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/inet.h>
50 #include <linux/in6.h>
51 #include <linux/netdevice.h>
52 #include <linux/if_addr.h>
53 #include <linux/if_arp.h>
54 #include <linux/if_arcnet.h>
55 #include <linux/if_infiniband.h>
56 #include <linux/route.h>
57 #include <linux/inetdevice.h>
58 #include <linux/init.h>
59 #include <linux/slab.h>
61 #include <linux/sysctl.h>
63 #include <linux/capability.h>
64 #include <linux/delay.h>
65 #include <linux/notifier.h>
66 #include <linux/string.h>
67 #include <linux/hash.h>
69 #include <net/net_namespace.h>
73 #include <net/6lowpan.h>
74 #include <net/firewire.h>
76 #include <net/protocol.h>
77 #include <net/ndisc.h>
78 #include <net/ip6_route.h>
79 #include <net/addrconf.h>
82 #include <net/netlink.h>
83 #include <net/pkt_sched.h>
84 #include <net/l3mdev.h>
85 #include <linux/if_tunnel.h>
86 #include <linux/rtnetlink.h>
87 #include <linux/netconf.h>
88 #include <linux/random.h>
89 #include <linux/uaccess.h>
90 #include <asm/unaligned.h>
92 #include <linux/proc_fs.h>
93 #include <linux/seq_file.h>
94 #include <linux/export.h>
96 /* Set to 3 to get tracing... */
100 #define ADBG(fmt, ...) printk(fmt, ##__VA_ARGS__)
102 #define ADBG(fmt, ...) do { if (0) printk(fmt, ##__VA_ARGS__); } while (0)
105 #define INFINITY_LIFE_TIME 0xFFFFFFFF
107 #define IPV6_MAX_STRLEN \
108 sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255")
110 static inline u32
cstamp_delta(unsigned long cstamp
)
112 return (cstamp
- INITIAL_JIFFIES
) * 100UL / HZ
;
116 static int addrconf_sysctl_register(struct inet6_dev
*idev
);
117 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
);
119 static inline int addrconf_sysctl_register(struct inet6_dev
*idev
)
124 static inline void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
129 static void __ipv6_regen_rndid(struct inet6_dev
*idev
);
130 static void __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
131 static void ipv6_regen_rndid(unsigned long data
);
133 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
);
134 static int ipv6_count_addresses(struct inet6_dev
*idev
);
135 static int ipv6_generate_stable_address(struct in6_addr
*addr
,
137 const struct inet6_dev
*idev
);
140 * Configured unicast address hash table
142 static struct hlist_head inet6_addr_lst
[IN6_ADDR_HSIZE
];
143 static DEFINE_SPINLOCK(addrconf_hash_lock
);
145 static void addrconf_verify(void);
146 static void addrconf_verify_rtnl(void);
147 static void addrconf_verify_work(struct work_struct
*);
149 static struct workqueue_struct
*addrconf_wq
;
150 static DECLARE_DELAYED_WORK(addr_chk_work
, addrconf_verify_work
);
152 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
153 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
155 static void addrconf_type_change(struct net_device
*dev
,
156 unsigned long event
);
157 static int addrconf_ifdown(struct net_device
*dev
, int how
);
159 static struct rt6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
161 const struct net_device
*dev
,
162 u32 flags
, u32 noflags
);
164 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
);
165 static void addrconf_dad_work(struct work_struct
*w
);
166 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
);
167 static void addrconf_dad_run(struct inet6_dev
*idev
);
168 static void addrconf_rs_timer(unsigned long data
);
169 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
170 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
172 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
173 struct prefix_info
*pinfo
);
174 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
175 struct net_device
*dev
);
177 static struct ipv6_devconf ipv6_devconf __read_mostly
= {
179 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
180 .mtu6
= IPV6_MIN_MTU
,
182 .accept_redirects
= 1,
184 .force_mld_version
= 0,
185 .mldv1_unsolicited_report_interval
= 10 * HZ
,
186 .mldv2_unsolicited_report_interval
= HZ
,
188 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
189 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
190 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
192 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
193 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
194 .regen_max_retry
= REGEN_MAX_RETRY
,
195 .max_desync_factor
= MAX_DESYNC_FACTOR
,
196 .max_addresses
= IPV6_MAX_ADDRESSES
,
197 .accept_ra_defrtr
= 1,
198 .accept_ra_from_local
= 0,
199 .accept_ra_min_hop_limit
= 1,
200 .accept_ra_pinfo
= 1,
201 #ifdef CONFIG_IPV6_ROUTER_PREF
202 .accept_ra_rtr_pref
= 1,
203 .rtr_probe_interval
= 60 * HZ
,
204 #ifdef CONFIG_IPV6_ROUTE_INFO
205 .accept_ra_rt_info_max_plen
= 0,
209 .accept_source_route
= 0, /* we do not accept RH0 by default. */
212 .suppress_frag_ndisc
= 1,
215 .initialized
= false,
217 .use_oif_addrs_only
= 0,
218 .ignore_routes_with_linkdown
= 0,
219 .keep_addr_on_down
= 0,
222 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly
= {
224 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
225 .mtu6
= IPV6_MIN_MTU
,
227 .accept_redirects
= 1,
229 .force_mld_version
= 0,
230 .mldv1_unsolicited_report_interval
= 10 * HZ
,
231 .mldv2_unsolicited_report_interval
= HZ
,
233 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
234 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
235 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
237 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
238 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
239 .regen_max_retry
= REGEN_MAX_RETRY
,
240 .max_desync_factor
= MAX_DESYNC_FACTOR
,
241 .max_addresses
= IPV6_MAX_ADDRESSES
,
242 .accept_ra_defrtr
= 1,
243 .accept_ra_from_local
= 0,
244 .accept_ra_min_hop_limit
= 1,
245 .accept_ra_pinfo
= 1,
246 #ifdef CONFIG_IPV6_ROUTER_PREF
247 .accept_ra_rtr_pref
= 1,
248 .rtr_probe_interval
= 60 * HZ
,
249 #ifdef CONFIG_IPV6_ROUTE_INFO
250 .accept_ra_rt_info_max_plen
= 0,
254 .accept_source_route
= 0, /* we do not accept RH0 by default. */
257 .suppress_frag_ndisc
= 1,
260 .initialized
= false,
262 .use_oif_addrs_only
= 0,
263 .ignore_routes_with_linkdown
= 0,
264 .keep_addr_on_down
= 0,
267 /* Check if a valid qdisc is available */
268 static inline bool addrconf_qdisc_ok(const struct net_device
*dev
)
270 return !qdisc_tx_is_noop(dev
);
273 static void addrconf_del_rs_timer(struct inet6_dev
*idev
)
275 if (del_timer(&idev
->rs_timer
))
279 static void addrconf_del_dad_work(struct inet6_ifaddr
*ifp
)
281 if (cancel_delayed_work(&ifp
->dad_work
))
285 static void addrconf_mod_rs_timer(struct inet6_dev
*idev
,
288 if (!timer_pending(&idev
->rs_timer
))
290 mod_timer(&idev
->rs_timer
, jiffies
+ when
);
293 static void addrconf_mod_dad_work(struct inet6_ifaddr
*ifp
,
296 if (!delayed_work_pending(&ifp
->dad_work
))
298 mod_delayed_work(addrconf_wq
, &ifp
->dad_work
, delay
);
301 static int snmp6_alloc_dev(struct inet6_dev
*idev
)
305 idev
->stats
.ipv6
= alloc_percpu(struct ipstats_mib
);
306 if (!idev
->stats
.ipv6
)
309 for_each_possible_cpu(i
) {
310 struct ipstats_mib
*addrconf_stats
;
311 addrconf_stats
= per_cpu_ptr(idev
->stats
.ipv6
, i
);
312 u64_stats_init(&addrconf_stats
->syncp
);
316 idev
->stats
.icmpv6dev
= kzalloc(sizeof(struct icmpv6_mib_device
),
318 if (!idev
->stats
.icmpv6dev
)
320 idev
->stats
.icmpv6msgdev
= kzalloc(sizeof(struct icmpv6msg_mib_device
),
322 if (!idev
->stats
.icmpv6msgdev
)
328 kfree(idev
->stats
.icmpv6dev
);
330 free_percpu(idev
->stats
.ipv6
);
335 static struct inet6_dev
*ipv6_add_dev(struct net_device
*dev
)
337 struct inet6_dev
*ndev
;
342 if (dev
->mtu
< IPV6_MIN_MTU
)
343 return ERR_PTR(-EINVAL
);
345 ndev
= kzalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
349 rwlock_init(&ndev
->lock
);
351 INIT_LIST_HEAD(&ndev
->addr_list
);
352 setup_timer(&ndev
->rs_timer
, addrconf_rs_timer
,
353 (unsigned long)ndev
);
354 memcpy(&ndev
->cnf
, dev_net(dev
)->ipv6
.devconf_dflt
, sizeof(ndev
->cnf
));
356 if (ndev
->cnf
.stable_secret
.initialized
)
357 ndev
->addr_gen_mode
= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
359 ndev
->addr_gen_mode
= IN6_ADDR_GEN_MODE_EUI64
;
361 ndev
->cnf
.mtu6
= dev
->mtu
;
362 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
363 if (!ndev
->nd_parms
) {
367 if (ndev
->cnf
.forwarding
)
368 dev_disable_lro(dev
);
369 /* We refer to the device */
372 if (snmp6_alloc_dev(ndev
) < 0) {
374 "%s: cannot allocate memory for statistics; dev=%s.\n",
375 __func__
, dev
->name
);
376 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
382 if (snmp6_register_dev(ndev
) < 0) {
384 "%s: cannot create /proc/net/dev_snmp6/%s\n",
385 __func__
, dev
->name
);
389 /* One reference from device. We must do this before
390 * we invoke __ipv6_regen_rndid().
394 if (dev
->flags
& (IFF_NOARP
| IFF_LOOPBACK
))
395 ndev
->cnf
.accept_dad
= -1;
397 #if IS_ENABLED(CONFIG_IPV6_SIT)
398 if (dev
->type
== ARPHRD_SIT
&& (dev
->priv_flags
& IFF_ISATAP
)) {
399 pr_info("%s: Disabled Multicast RS\n", dev
->name
);
400 ndev
->cnf
.rtr_solicits
= 0;
404 INIT_LIST_HEAD(&ndev
->tempaddr_list
);
405 setup_timer(&ndev
->regen_timer
, ipv6_regen_rndid
, (unsigned long)ndev
);
406 if ((dev
->flags
&IFF_LOOPBACK
) ||
407 dev
->type
== ARPHRD_TUNNEL
||
408 dev
->type
== ARPHRD_TUNNEL6
||
409 dev
->type
== ARPHRD_SIT
||
410 dev
->type
== ARPHRD_NONE
) {
411 ndev
->cnf
.use_tempaddr
= -1;
414 ipv6_regen_rndid((unsigned long) ndev
);
417 ndev
->token
= in6addr_any
;
419 if (netif_running(dev
) && addrconf_qdisc_ok(dev
))
420 ndev
->if_flags
|= IF_READY
;
422 ipv6_mc_init_dev(ndev
);
423 ndev
->tstamp
= jiffies
;
424 err
= addrconf_sysctl_register(ndev
);
426 ipv6_mc_destroy_dev(ndev
);
427 del_timer(&ndev
->regen_timer
);
428 snmp6_unregister_dev(ndev
);
431 /* protected by rtnl_lock */
432 rcu_assign_pointer(dev
->ip6_ptr
, ndev
);
434 /* Join interface-local all-node multicast group */
435 ipv6_dev_mc_inc(dev
, &in6addr_interfacelocal_allnodes
);
437 /* Join all-node multicast group */
438 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allnodes
);
440 /* Join all-router multicast group if forwarding is set */
441 if (ndev
->cnf
.forwarding
&& (dev
->flags
& IFF_MULTICAST
))
442 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
447 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
449 in6_dev_finish_destroy(ndev
);
453 static struct inet6_dev
*ipv6_find_idev(struct net_device
*dev
)
455 struct inet6_dev
*idev
;
459 idev
= __in6_dev_get(dev
);
461 idev
= ipv6_add_dev(dev
);
466 if (dev
->flags
&IFF_UP
)
471 static int inet6_netconf_msgsize_devconf(int type
)
473 int size
= NLMSG_ALIGN(sizeof(struct netconfmsg
))
474 + nla_total_size(4); /* NETCONFA_IFINDEX */
477 if (type
== NETCONFA_ALL
)
480 if (all
|| type
== NETCONFA_FORWARDING
)
481 size
+= nla_total_size(4);
482 #ifdef CONFIG_IPV6_MROUTE
483 if (all
|| type
== NETCONFA_MC_FORWARDING
)
484 size
+= nla_total_size(4);
486 if (all
|| type
== NETCONFA_PROXY_NEIGH
)
487 size
+= nla_total_size(4);
489 if (all
|| type
== NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
)
490 size
+= nla_total_size(4);
495 static int inet6_netconf_fill_devconf(struct sk_buff
*skb
, int ifindex
,
496 struct ipv6_devconf
*devconf
, u32 portid
,
497 u32 seq
, int event
, unsigned int flags
,
500 struct nlmsghdr
*nlh
;
501 struct netconfmsg
*ncm
;
504 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct netconfmsg
),
509 if (type
== NETCONFA_ALL
)
512 ncm
= nlmsg_data(nlh
);
513 ncm
->ncm_family
= AF_INET6
;
515 if (nla_put_s32(skb
, NETCONFA_IFINDEX
, ifindex
) < 0)
516 goto nla_put_failure
;
518 if ((all
|| type
== NETCONFA_FORWARDING
) &&
519 nla_put_s32(skb
, NETCONFA_FORWARDING
, devconf
->forwarding
) < 0)
520 goto nla_put_failure
;
521 #ifdef CONFIG_IPV6_MROUTE
522 if ((all
|| type
== NETCONFA_MC_FORWARDING
) &&
523 nla_put_s32(skb
, NETCONFA_MC_FORWARDING
,
524 devconf
->mc_forwarding
) < 0)
525 goto nla_put_failure
;
527 if ((all
|| type
== NETCONFA_PROXY_NEIGH
) &&
528 nla_put_s32(skb
, NETCONFA_PROXY_NEIGH
, devconf
->proxy_ndp
) < 0)
529 goto nla_put_failure
;
531 if ((all
|| type
== NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
) &&
532 nla_put_s32(skb
, NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
,
533 devconf
->ignore_routes_with_linkdown
) < 0)
534 goto nla_put_failure
;
540 nlmsg_cancel(skb
, nlh
);
544 void inet6_netconf_notify_devconf(struct net
*net
, int type
, int ifindex
,
545 struct ipv6_devconf
*devconf
)
550 skb
= nlmsg_new(inet6_netconf_msgsize_devconf(type
), GFP_KERNEL
);
554 err
= inet6_netconf_fill_devconf(skb
, ifindex
, devconf
, 0, 0,
555 RTM_NEWNETCONF
, 0, type
);
557 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
558 WARN_ON(err
== -EMSGSIZE
);
562 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_NETCONF
, NULL
, GFP_KERNEL
);
565 rtnl_set_sk_err(net
, RTNLGRP_IPV6_NETCONF
, err
);
568 static const struct nla_policy devconf_ipv6_policy
[NETCONFA_MAX
+1] = {
569 [NETCONFA_IFINDEX
] = { .len
= sizeof(int) },
570 [NETCONFA_FORWARDING
] = { .len
= sizeof(int) },
571 [NETCONFA_PROXY_NEIGH
] = { .len
= sizeof(int) },
572 [NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
] = { .len
= sizeof(int) },
575 static int inet6_netconf_get_devconf(struct sk_buff
*in_skb
,
576 struct nlmsghdr
*nlh
)
578 struct net
*net
= sock_net(in_skb
->sk
);
579 struct nlattr
*tb
[NETCONFA_MAX
+1];
580 struct netconfmsg
*ncm
;
582 struct ipv6_devconf
*devconf
;
583 struct inet6_dev
*in6_dev
;
584 struct net_device
*dev
;
588 err
= nlmsg_parse(nlh
, sizeof(*ncm
), tb
, NETCONFA_MAX
,
589 devconf_ipv6_policy
);
594 if (!tb
[NETCONFA_IFINDEX
])
597 ifindex
= nla_get_s32(tb
[NETCONFA_IFINDEX
]);
599 case NETCONFA_IFINDEX_ALL
:
600 devconf
= net
->ipv6
.devconf_all
;
602 case NETCONFA_IFINDEX_DEFAULT
:
603 devconf
= net
->ipv6
.devconf_dflt
;
606 dev
= __dev_get_by_index(net
, ifindex
);
609 in6_dev
= __in6_dev_get(dev
);
612 devconf
= &in6_dev
->cnf
;
617 skb
= nlmsg_new(inet6_netconf_msgsize_devconf(NETCONFA_ALL
), GFP_ATOMIC
);
621 err
= inet6_netconf_fill_devconf(skb
, ifindex
, devconf
,
622 NETLINK_CB(in_skb
).portid
,
623 nlh
->nlmsg_seq
, RTM_NEWNETCONF
, 0,
626 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
627 WARN_ON(err
== -EMSGSIZE
);
631 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).portid
);
636 static int inet6_netconf_dump_devconf(struct sk_buff
*skb
,
637 struct netlink_callback
*cb
)
639 struct net
*net
= sock_net(skb
->sk
);
642 struct net_device
*dev
;
643 struct inet6_dev
*idev
;
644 struct hlist_head
*head
;
647 s_idx
= idx
= cb
->args
[1];
649 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
651 head
= &net
->dev_index_head
[h
];
653 cb
->seq
= atomic_read(&net
->ipv6
.dev_addr_genid
) ^
655 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
658 idev
= __in6_dev_get(dev
);
662 if (inet6_netconf_fill_devconf(skb
, dev
->ifindex
,
664 NETLINK_CB(cb
->skb
).portid
,
672 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
678 if (h
== NETDEV_HASHENTRIES
) {
679 if (inet6_netconf_fill_devconf(skb
, NETCONFA_IFINDEX_ALL
,
680 net
->ipv6
.devconf_all
,
681 NETLINK_CB(cb
->skb
).portid
,
683 RTM_NEWNETCONF
, NLM_F_MULTI
,
689 if (h
== NETDEV_HASHENTRIES
+ 1) {
690 if (inet6_netconf_fill_devconf(skb
, NETCONFA_IFINDEX_DEFAULT
,
691 net
->ipv6
.devconf_dflt
,
692 NETLINK_CB(cb
->skb
).portid
,
694 RTM_NEWNETCONF
, NLM_F_MULTI
,
708 static void dev_forward_change(struct inet6_dev
*idev
)
710 struct net_device
*dev
;
711 struct inet6_ifaddr
*ifa
;
716 if (idev
->cnf
.forwarding
)
717 dev_disable_lro(dev
);
718 if (dev
->flags
& IFF_MULTICAST
) {
719 if (idev
->cnf
.forwarding
) {
720 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
721 ipv6_dev_mc_inc(dev
, &in6addr_interfacelocal_allrouters
);
722 ipv6_dev_mc_inc(dev
, &in6addr_sitelocal_allrouters
);
724 ipv6_dev_mc_dec(dev
, &in6addr_linklocal_allrouters
);
725 ipv6_dev_mc_dec(dev
, &in6addr_interfacelocal_allrouters
);
726 ipv6_dev_mc_dec(dev
, &in6addr_sitelocal_allrouters
);
730 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
731 if (ifa
->flags
&IFA_F_TENTATIVE
)
733 if (idev
->cnf
.forwarding
)
734 addrconf_join_anycast(ifa
);
736 addrconf_leave_anycast(ifa
);
738 inet6_netconf_notify_devconf(dev_net(dev
), NETCONFA_FORWARDING
,
739 dev
->ifindex
, &idev
->cnf
);
743 static void addrconf_forward_change(struct net
*net
, __s32 newf
)
745 struct net_device
*dev
;
746 struct inet6_dev
*idev
;
748 for_each_netdev(net
, dev
) {
749 idev
= __in6_dev_get(dev
);
751 int changed
= (!idev
->cnf
.forwarding
) ^ (!newf
);
752 idev
->cnf
.forwarding
= newf
;
754 dev_forward_change(idev
);
759 static int addrconf_fixup_forwarding(struct ctl_table
*table
, int *p
, int newf
)
765 return restart_syscall();
767 net
= (struct net
*)table
->extra2
;
771 if (p
== &net
->ipv6
.devconf_dflt
->forwarding
) {
772 if ((!newf
) ^ (!old
))
773 inet6_netconf_notify_devconf(net
, NETCONFA_FORWARDING
,
774 NETCONFA_IFINDEX_DEFAULT
,
775 net
->ipv6
.devconf_dflt
);
780 if (p
== &net
->ipv6
.devconf_all
->forwarding
) {
781 net
->ipv6
.devconf_dflt
->forwarding
= newf
;
782 addrconf_forward_change(net
, newf
);
783 if ((!newf
) ^ (!old
))
784 inet6_netconf_notify_devconf(net
, NETCONFA_FORWARDING
,
785 NETCONFA_IFINDEX_ALL
,
786 net
->ipv6
.devconf_all
);
787 } else if ((!newf
) ^ (!old
))
788 dev_forward_change((struct inet6_dev
*)table
->extra1
);
792 rt6_purge_dflt_routers(net
);
796 static void addrconf_linkdown_change(struct net
*net
, __s32 newf
)
798 struct net_device
*dev
;
799 struct inet6_dev
*idev
;
801 for_each_netdev(net
, dev
) {
802 idev
= __in6_dev_get(dev
);
804 int changed
= (!idev
->cnf
.ignore_routes_with_linkdown
) ^ (!newf
);
806 idev
->cnf
.ignore_routes_with_linkdown
= newf
;
808 inet6_netconf_notify_devconf(dev_net(dev
),
809 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
,
816 static int addrconf_fixup_linkdown(struct ctl_table
*table
, int *p
, int newf
)
822 return restart_syscall();
824 net
= (struct net
*)table
->extra2
;
828 if (p
== &net
->ipv6
.devconf_dflt
->ignore_routes_with_linkdown
) {
829 if ((!newf
) ^ (!old
))
830 inet6_netconf_notify_devconf(net
,
831 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
,
832 NETCONFA_IFINDEX_DEFAULT
,
833 net
->ipv6
.devconf_dflt
);
838 if (p
== &net
->ipv6
.devconf_all
->ignore_routes_with_linkdown
) {
839 net
->ipv6
.devconf_dflt
->ignore_routes_with_linkdown
= newf
;
840 addrconf_linkdown_change(net
, newf
);
841 if ((!newf
) ^ (!old
))
842 inet6_netconf_notify_devconf(net
,
843 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
,
844 NETCONFA_IFINDEX_ALL
,
845 net
->ipv6
.devconf_all
);
854 /* Nobody refers to this ifaddr, destroy it */
855 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
857 WARN_ON(!hlist_unhashed(&ifp
->addr_lst
));
859 #ifdef NET_REFCNT_DEBUG
860 pr_debug("%s\n", __func__
);
863 in6_dev_put(ifp
->idev
);
865 if (cancel_delayed_work(&ifp
->dad_work
))
866 pr_notice("delayed DAD work was pending while freeing ifa=%p\n",
869 if (ifp
->state
!= INET6_IFADDR_STATE_DEAD
) {
870 pr_warn("Freeing alive inet6 address %p\n", ifp
);
879 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
882 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
885 * Each device address list is sorted in order of scope -
886 * global before linklocal.
888 list_for_each(p
, &idev
->addr_list
) {
889 struct inet6_ifaddr
*ifa
890 = list_entry(p
, struct inet6_ifaddr
, if_list
);
891 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
895 list_add_tail(&ifp
->if_list
, p
);
898 static u32
inet6_addr_hash(const struct in6_addr
*addr
)
900 return hash_32(ipv6_addr_hash(addr
), IN6_ADDR_HSIZE_SHIFT
);
903 /* On success it returns ifp with increased reference count */
905 static struct inet6_ifaddr
*
906 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
907 const struct in6_addr
*peer_addr
, int pfxlen
,
908 int scope
, u32 flags
, u32 valid_lft
, u32 prefered_lft
)
910 struct inet6_ifaddr
*ifa
= NULL
;
914 int addr_type
= ipv6_addr_type(addr
);
916 if (addr_type
== IPV6_ADDR_ANY
||
917 addr_type
& IPV6_ADDR_MULTICAST
||
918 (!(idev
->dev
->flags
& IFF_LOOPBACK
) &&
919 addr_type
& IPV6_ADDR_LOOPBACK
))
920 return ERR_PTR(-EADDRNOTAVAIL
);
924 err
= -ENODEV
; /*XXX*/
928 if (idev
->cnf
.disable_ipv6
) {
933 spin_lock(&addrconf_hash_lock
);
935 /* Ignore adding duplicate addresses on an interface */
936 if (ipv6_chk_same_addr(dev_net(idev
->dev
), addr
, idev
->dev
)) {
937 ADBG("ipv6_add_addr: already assigned\n");
942 ifa
= kzalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
945 ADBG("ipv6_add_addr: malloc failed\n");
950 rt
= addrconf_dst_alloc(idev
, addr
, false);
956 neigh_parms_data_state_setall(idev
->nd_parms
);
960 ifa
->peer_addr
= *peer_addr
;
962 spin_lock_init(&ifa
->lock
);
963 INIT_DELAYED_WORK(&ifa
->dad_work
, addrconf_dad_work
);
964 INIT_HLIST_NODE(&ifa
->addr_lst
);
966 ifa
->prefix_len
= pfxlen
;
967 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
968 ifa
->valid_lft
= valid_lft
;
969 ifa
->prefered_lft
= prefered_lft
;
970 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
971 ifa
->tokenized
= false;
980 /* Add to big hash table */
981 hash
= inet6_addr_hash(addr
);
983 hlist_add_head_rcu(&ifa
->addr_lst
, &inet6_addr_lst
[hash
]);
984 spin_unlock(&addrconf_hash_lock
);
986 write_lock(&idev
->lock
);
987 /* Add to inet6_dev unicast addr list. */
988 ipv6_link_dev_addr(idev
, ifa
);
990 if (ifa
->flags
&IFA_F_TEMPORARY
) {
991 list_add(&ifa
->tmp_list
, &idev
->tempaddr_list
);
996 write_unlock(&idev
->lock
);
998 rcu_read_unlock_bh();
1000 if (likely(err
== 0))
1001 inet6addr_notifier_call_chain(NETDEV_UP
, ifa
);
1009 spin_unlock(&addrconf_hash_lock
);
1013 enum cleanup_prefix_rt_t
{
1014 CLEANUP_PREFIX_RT_NOP
, /* no cleanup action for prefix route */
1015 CLEANUP_PREFIX_RT_DEL
, /* delete the prefix route */
1016 CLEANUP_PREFIX_RT_EXPIRE
, /* update the lifetime of the prefix route */
1020 * Check, whether the prefix for ifp would still need a prefix route
1021 * after deleting ifp. The function returns one of the CLEANUP_PREFIX_RT_*
1024 * 1) we don't purge prefix if address was not permanent.
1025 * prefix is managed by its own lifetime.
1026 * 2) we also don't purge, if the address was IFA_F_NOPREFIXROUTE.
1027 * 3) if there are no addresses, delete prefix.
1028 * 4) if there are still other permanent address(es),
1029 * corresponding prefix is still permanent.
1030 * 5) if there are still other addresses with IFA_F_NOPREFIXROUTE,
1031 * don't purge the prefix, assume user space is managing it.
1032 * 6) otherwise, update prefix lifetime to the
1033 * longest valid lifetime among the corresponding
1034 * addresses on the device.
1035 * Note: subsequent RA will update lifetime.
1037 static enum cleanup_prefix_rt_t
1038 check_cleanup_prefix_route(struct inet6_ifaddr
*ifp
, unsigned long *expires
)
1040 struct inet6_ifaddr
*ifa
;
1041 struct inet6_dev
*idev
= ifp
->idev
;
1042 unsigned long lifetime
;
1043 enum cleanup_prefix_rt_t action
= CLEANUP_PREFIX_RT_DEL
;
1047 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
1050 if (!ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
1053 if (ifa
->flags
& (IFA_F_PERMANENT
| IFA_F_NOPREFIXROUTE
))
1054 return CLEANUP_PREFIX_RT_NOP
;
1056 action
= CLEANUP_PREFIX_RT_EXPIRE
;
1058 spin_lock(&ifa
->lock
);
1060 lifetime
= addrconf_timeout_fixup(ifa
->valid_lft
, HZ
);
1062 * Note: Because this address is
1063 * not permanent, lifetime <
1064 * LONG_MAX / HZ here.
1066 if (time_before(*expires
, ifa
->tstamp
+ lifetime
* HZ
))
1067 *expires
= ifa
->tstamp
+ lifetime
* HZ
;
1068 spin_unlock(&ifa
->lock
);
1075 cleanup_prefix_route(struct inet6_ifaddr
*ifp
, unsigned long expires
, bool del_rt
)
1077 struct rt6_info
*rt
;
1079 rt
= addrconf_get_prefix_route(&ifp
->addr
,
1082 0, RTF_GATEWAY
| RTF_DEFAULT
);
1087 if (!(rt
->rt6i_flags
& RTF_EXPIRES
))
1088 rt6_set_expires(rt
, expires
);
1095 /* This function wants to get referenced ifp and releases it before return */
1097 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
1100 enum cleanup_prefix_rt_t action
= CLEANUP_PREFIX_RT_NOP
;
1101 unsigned long expires
;
1105 spin_lock_bh(&ifp
->lock
);
1107 ifp
->state
= INET6_IFADDR_STATE_DEAD
;
1108 spin_unlock_bh(&ifp
->lock
);
1110 if (state
== INET6_IFADDR_STATE_DEAD
)
1113 spin_lock_bh(&addrconf_hash_lock
);
1114 hlist_del_init_rcu(&ifp
->addr_lst
);
1115 spin_unlock_bh(&addrconf_hash_lock
);
1117 write_lock_bh(&ifp
->idev
->lock
);
1119 if (ifp
->flags
&IFA_F_TEMPORARY
) {
1120 list_del(&ifp
->tmp_list
);
1122 in6_ifa_put(ifp
->ifpub
);
1128 if (ifp
->flags
& IFA_F_PERMANENT
&& !(ifp
->flags
& IFA_F_NOPREFIXROUTE
))
1129 action
= check_cleanup_prefix_route(ifp
, &expires
);
1131 list_del_init(&ifp
->if_list
);
1134 write_unlock_bh(&ifp
->idev
->lock
);
1136 addrconf_del_dad_work(ifp
);
1138 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
1140 inet6addr_notifier_call_chain(NETDEV_DOWN
, ifp
);
1142 if (action
!= CLEANUP_PREFIX_RT_NOP
) {
1143 cleanup_prefix_route(ifp
, expires
,
1144 action
== CLEANUP_PREFIX_RT_DEL
);
1147 /* clean up prefsrc entries */
1148 rt6_remove_prefsrc(ifp
);
1153 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
1155 struct inet6_dev
*idev
= ifp
->idev
;
1156 struct in6_addr addr
, *tmpaddr
;
1157 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_tstamp
, age
;
1158 unsigned long regen_advance
;
1162 unsigned long now
= jiffies
;
1164 write_lock_bh(&idev
->lock
);
1166 spin_lock_bh(&ift
->lock
);
1167 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
1168 spin_unlock_bh(&ift
->lock
);
1175 if (idev
->cnf
.use_tempaddr
<= 0) {
1176 write_unlock_bh(&idev
->lock
);
1177 pr_info("%s: use_tempaddr is disabled\n", __func__
);
1182 spin_lock_bh(&ifp
->lock
);
1183 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
1184 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
1185 spin_unlock_bh(&ifp
->lock
);
1186 write_unlock_bh(&idev
->lock
);
1187 pr_warn("%s: regeneration time exceeded - disabled temporary address support\n",
1194 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
1195 __ipv6_try_regen_rndid(idev
, tmpaddr
);
1196 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
1197 age
= (now
- ifp
->tstamp
) / HZ
;
1198 tmp_valid_lft
= min_t(__u32
,
1200 idev
->cnf
.temp_valid_lft
+ age
);
1201 tmp_prefered_lft
= min_t(__u32
,
1203 idev
->cnf
.temp_prefered_lft
+ age
-
1204 idev
->cnf
.max_desync_factor
);
1205 tmp_plen
= ifp
->prefix_len
;
1206 tmp_tstamp
= ifp
->tstamp
;
1207 spin_unlock_bh(&ifp
->lock
);
1209 regen_advance
= idev
->cnf
.regen_max_retry
*
1210 idev
->cnf
.dad_transmits
*
1211 NEIGH_VAR(idev
->nd_parms
, RETRANS_TIME
) / HZ
;
1212 write_unlock_bh(&idev
->lock
);
1214 /* A temporary address is created only if this calculated Preferred
1215 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
1216 * an implementation must not create a temporary address with a zero
1217 * Preferred Lifetime.
1218 * Use age calculation as in addrconf_verify to avoid unnecessary
1219 * temporary addresses being generated.
1221 age
= (now
- tmp_tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
1222 if (tmp_prefered_lft
<= regen_advance
+ age
) {
1229 addr_flags
= IFA_F_TEMPORARY
;
1230 /* set in addrconf_prefix_rcv() */
1231 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
1232 addr_flags
|= IFA_F_OPTIMISTIC
;
1234 ift
= ipv6_add_addr(idev
, &addr
, NULL
, tmp_plen
,
1235 ipv6_addr_scope(&addr
), addr_flags
,
1236 tmp_valid_lft
, tmp_prefered_lft
);
1240 pr_info("%s: retry temporary address regeneration\n", __func__
);
1242 write_lock_bh(&idev
->lock
);
1246 spin_lock_bh(&ift
->lock
);
1249 ift
->tstamp
= tmp_tstamp
;
1250 spin_unlock_bh(&ift
->lock
);
1252 addrconf_dad_start(ift
);
1260 * Choose an appropriate source address (RFC3484)
1263 IPV6_SADDR_RULE_INIT
= 0,
1264 IPV6_SADDR_RULE_LOCAL
,
1265 IPV6_SADDR_RULE_SCOPE
,
1266 IPV6_SADDR_RULE_PREFERRED
,
1267 #ifdef CONFIG_IPV6_MIP6
1268 IPV6_SADDR_RULE_HOA
,
1270 IPV6_SADDR_RULE_OIF
,
1271 IPV6_SADDR_RULE_LABEL
,
1272 IPV6_SADDR_RULE_PRIVACY
,
1273 IPV6_SADDR_RULE_ORCHID
,
1274 IPV6_SADDR_RULE_PREFIX
,
1275 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1276 IPV6_SADDR_RULE_NOT_OPTIMISTIC
,
1281 struct ipv6_saddr_score
{
1284 struct inet6_ifaddr
*ifa
;
1285 DECLARE_BITMAP(scorebits
, IPV6_SADDR_RULE_MAX
);
1290 struct ipv6_saddr_dst
{
1291 const struct in6_addr
*addr
;
1298 static inline int ipv6_saddr_preferred(int type
)
1300 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|IPV6_ADDR_LOOPBACK
))
1305 static inline bool ipv6_use_optimistic_addr(struct inet6_dev
*idev
)
1307 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1308 return idev
&& idev
->cnf
.optimistic_dad
&& idev
->cnf
.use_optimistic
;
1314 static int ipv6_get_saddr_eval(struct net
*net
,
1315 struct ipv6_saddr_score
*score
,
1316 struct ipv6_saddr_dst
*dst
,
1321 if (i
<= score
->rule
) {
1323 case IPV6_SADDR_RULE_SCOPE
:
1324 ret
= score
->scopedist
;
1326 case IPV6_SADDR_RULE_PREFIX
:
1327 ret
= score
->matchlen
;
1330 ret
= !!test_bit(i
, score
->scorebits
);
1336 case IPV6_SADDR_RULE_INIT
:
1337 /* Rule 0: remember if hiscore is not ready yet */
1340 case IPV6_SADDR_RULE_LOCAL
:
1341 /* Rule 1: Prefer same address */
1342 ret
= ipv6_addr_equal(&score
->ifa
->addr
, dst
->addr
);
1344 case IPV6_SADDR_RULE_SCOPE
:
1345 /* Rule 2: Prefer appropriate scope
1350 * ---+--+-+---> scope
1352 * | d is scope of the destination.
1354 * | \ <- smaller scope is better if
1355 * B-15 | \ if scope is enough for destination.
1356 * | ret = B - scope (-1 <= scope >= d <= 15).
1358 * |/ <- greater is better
1359 * -C / if scope is not enough for destination.
1360 * /| ret = scope - C (-1 <= d < scope <= 15).
1362 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1363 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1364 * Assume B = 0 and we get C > 29.
1366 ret
= __ipv6_addr_src_scope(score
->addr_type
);
1367 if (ret
>= dst
->scope
)
1370 ret
-= 128; /* 30 is enough */
1371 score
->scopedist
= ret
;
1373 case IPV6_SADDR_RULE_PREFERRED
:
1375 /* Rule 3: Avoid deprecated and optimistic addresses */
1376 u8 avoid
= IFA_F_DEPRECATED
;
1378 if (!ipv6_use_optimistic_addr(score
->ifa
->idev
))
1379 avoid
|= IFA_F_OPTIMISTIC
;
1380 ret
= ipv6_saddr_preferred(score
->addr_type
) ||
1381 !(score
->ifa
->flags
& avoid
);
1384 #ifdef CONFIG_IPV6_MIP6
1385 case IPV6_SADDR_RULE_HOA
:
1387 /* Rule 4: Prefer home address */
1388 int prefhome
= !(dst
->prefs
& IPV6_PREFER_SRC_COA
);
1389 ret
= !(score
->ifa
->flags
& IFA_F_HOMEADDRESS
) ^ prefhome
;
1393 case IPV6_SADDR_RULE_OIF
:
1394 /* Rule 5: Prefer outgoing interface */
1395 ret
= (!dst
->ifindex
||
1396 dst
->ifindex
== score
->ifa
->idev
->dev
->ifindex
);
1398 case IPV6_SADDR_RULE_LABEL
:
1399 /* Rule 6: Prefer matching label */
1400 ret
= ipv6_addr_label(net
,
1401 &score
->ifa
->addr
, score
->addr_type
,
1402 score
->ifa
->idev
->dev
->ifindex
) == dst
->label
;
1404 case IPV6_SADDR_RULE_PRIVACY
:
1406 /* Rule 7: Prefer public address
1407 * Note: prefer temporary address if use_tempaddr >= 2
1409 int preftmp
= dst
->prefs
& (IPV6_PREFER_SRC_PUBLIC
|IPV6_PREFER_SRC_TMP
) ?
1410 !!(dst
->prefs
& IPV6_PREFER_SRC_TMP
) :
1411 score
->ifa
->idev
->cnf
.use_tempaddr
>= 2;
1412 ret
= (!(score
->ifa
->flags
& IFA_F_TEMPORARY
)) ^ preftmp
;
1415 case IPV6_SADDR_RULE_ORCHID
:
1416 /* Rule 8-: Prefer ORCHID vs ORCHID or
1417 * non-ORCHID vs non-ORCHID
1419 ret
= !(ipv6_addr_orchid(&score
->ifa
->addr
) ^
1420 ipv6_addr_orchid(dst
->addr
));
1422 case IPV6_SADDR_RULE_PREFIX
:
1423 /* Rule 8: Use longest matching prefix */
1424 ret
= ipv6_addr_diff(&score
->ifa
->addr
, dst
->addr
);
1425 if (ret
> score
->ifa
->prefix_len
)
1426 ret
= score
->ifa
->prefix_len
;
1427 score
->matchlen
= ret
;
1429 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1430 case IPV6_SADDR_RULE_NOT_OPTIMISTIC
:
1431 /* Optimistic addresses still have lower precedence than other
1432 * preferred addresses.
1434 ret
= !(score
->ifa
->flags
& IFA_F_OPTIMISTIC
);
1442 __set_bit(i
, score
->scorebits
);
1448 static int __ipv6_dev_get_saddr(struct net
*net
,
1449 struct ipv6_saddr_dst
*dst
,
1450 struct inet6_dev
*idev
,
1451 struct ipv6_saddr_score
*scores
,
1454 struct ipv6_saddr_score
*score
= &scores
[1 - hiscore_idx
], *hiscore
= &scores
[hiscore_idx
];
1456 read_lock_bh(&idev
->lock
);
1457 list_for_each_entry(score
->ifa
, &idev
->addr_list
, if_list
) {
1461 * - Tentative Address (RFC2462 section 5.4)
1462 * - A tentative address is not considered
1463 * "assigned to an interface" in the traditional
1464 * sense, unless it is also flagged as optimistic.
1465 * - Candidate Source Address (section 4)
1466 * - In any case, anycast addresses, multicast
1467 * addresses, and the unspecified address MUST
1468 * NOT be included in a candidate set.
1470 if ((score
->ifa
->flags
& IFA_F_TENTATIVE
) &&
1471 (!(score
->ifa
->flags
& IFA_F_OPTIMISTIC
)))
1474 score
->addr_type
= __ipv6_addr_type(&score
->ifa
->addr
);
1476 if (unlikely(score
->addr_type
== IPV6_ADDR_ANY
||
1477 score
->addr_type
& IPV6_ADDR_MULTICAST
)) {
1478 net_dbg_ratelimited("ADDRCONF: unspecified / multicast address assigned as unicast address on %s",
1484 bitmap_zero(score
->scorebits
, IPV6_SADDR_RULE_MAX
);
1486 for (i
= 0; i
< IPV6_SADDR_RULE_MAX
; i
++) {
1487 int minihiscore
, miniscore
;
1489 minihiscore
= ipv6_get_saddr_eval(net
, hiscore
, dst
, i
);
1490 miniscore
= ipv6_get_saddr_eval(net
, score
, dst
, i
);
1492 if (minihiscore
> miniscore
) {
1493 if (i
== IPV6_SADDR_RULE_SCOPE
&&
1494 score
->scopedist
> 0) {
1497 * each remaining entry
1498 * has too small (not enough)
1499 * scope, because ifa entries
1500 * are sorted by their scope
1506 } else if (minihiscore
< miniscore
) {
1508 in6_ifa_put(hiscore
->ifa
);
1510 in6_ifa_hold(score
->ifa
);
1512 swap(hiscore
, score
);
1513 hiscore_idx
= 1 - hiscore_idx
;
1515 /* restore our iterator */
1516 score
->ifa
= hiscore
->ifa
;
1523 read_unlock_bh(&idev
->lock
);
1527 static int ipv6_get_saddr_master(struct net
*net
,
1528 const struct net_device
*dst_dev
,
1529 const struct net_device
*master
,
1530 struct ipv6_saddr_dst
*dst
,
1531 struct ipv6_saddr_score
*scores
,
1534 struct inet6_dev
*idev
;
1536 idev
= __in6_dev_get(dst_dev
);
1538 hiscore_idx
= __ipv6_dev_get_saddr(net
, dst
, idev
,
1539 scores
, hiscore_idx
);
1541 idev
= __in6_dev_get(master
);
1543 hiscore_idx
= __ipv6_dev_get_saddr(net
, dst
, idev
,
1544 scores
, hiscore_idx
);
1549 int ipv6_dev_get_saddr(struct net
*net
, const struct net_device
*dst_dev
,
1550 const struct in6_addr
*daddr
, unsigned int prefs
,
1551 struct in6_addr
*saddr
)
1553 struct ipv6_saddr_score scores
[2], *hiscore
;
1554 struct ipv6_saddr_dst dst
;
1555 struct inet6_dev
*idev
;
1556 struct net_device
*dev
;
1558 bool use_oif_addr
= false;
1559 int hiscore_idx
= 0;
1561 dst_type
= __ipv6_addr_type(daddr
);
1563 dst
.ifindex
= dst_dev
? dst_dev
->ifindex
: 0;
1564 dst
.scope
= __ipv6_addr_src_scope(dst_type
);
1565 dst
.label
= ipv6_addr_label(net
, daddr
, dst_type
, dst
.ifindex
);
1568 scores
[hiscore_idx
].rule
= -1;
1569 scores
[hiscore_idx
].ifa
= NULL
;
1573 /* Candidate Source Address (section 4)
1574 * - multicast and link-local destination address,
1575 * the set of candidate source address MUST only
1576 * include addresses assigned to interfaces
1577 * belonging to the same link as the outgoing
1579 * (- For site-local destination addresses, the
1580 * set of candidate source addresses MUST only
1581 * include addresses assigned to interfaces
1582 * belonging to the same site as the outgoing
1584 * - "It is RECOMMENDED that the candidate source addresses
1585 * be the set of unicast addresses assigned to the
1586 * interface that will be used to send to the destination
1587 * (the 'outgoing' interface)." (RFC 6724)
1590 idev
= __in6_dev_get(dst_dev
);
1591 if ((dst_type
& IPV6_ADDR_MULTICAST
) ||
1592 dst
.scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
||
1593 (idev
&& idev
->cnf
.use_oif_addrs_only
)) {
1594 use_oif_addr
= true;
1600 hiscore_idx
= __ipv6_dev_get_saddr(net
, &dst
, idev
, scores
, hiscore_idx
);
1602 const struct net_device
*master
;
1605 /* if dst_dev exists and is enslaved to an L3 device, then
1606 * prefer addresses from dst_dev and then the master over
1607 * any other enslaved devices in the L3 domain.
1609 master
= l3mdev_master_dev_rcu(dst_dev
);
1611 master_idx
= master
->ifindex
;
1613 hiscore_idx
= ipv6_get_saddr_master(net
, dst_dev
,
1615 scores
, hiscore_idx
);
1617 if (scores
[hiscore_idx
].ifa
)
1621 for_each_netdev_rcu(net
, dev
) {
1622 /* only consider addresses on devices in the
1625 if (l3mdev_master_ifindex_rcu(dev
) != master_idx
)
1627 idev
= __in6_dev_get(dev
);
1630 hiscore_idx
= __ipv6_dev_get_saddr(net
, &dst
, idev
, scores
, hiscore_idx
);
1637 hiscore
= &scores
[hiscore_idx
];
1639 return -EADDRNOTAVAIL
;
1641 *saddr
= hiscore
->ifa
->addr
;
1642 in6_ifa_put(hiscore
->ifa
);
1645 EXPORT_SYMBOL(ipv6_dev_get_saddr
);
1647 int __ipv6_get_lladdr(struct inet6_dev
*idev
, struct in6_addr
*addr
,
1650 struct inet6_ifaddr
*ifp
;
1651 int err
= -EADDRNOTAVAIL
;
1653 list_for_each_entry_reverse(ifp
, &idev
->addr_list
, if_list
) {
1654 if (ifp
->scope
> IFA_LINK
)
1656 if (ifp
->scope
== IFA_LINK
&&
1657 !(ifp
->flags
& banned_flags
)) {
1666 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1669 struct inet6_dev
*idev
;
1670 int err
= -EADDRNOTAVAIL
;
1673 idev
= __in6_dev_get(dev
);
1675 read_lock_bh(&idev
->lock
);
1676 err
= __ipv6_get_lladdr(idev
, addr
, banned_flags
);
1677 read_unlock_bh(&idev
->lock
);
1683 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1686 struct inet6_ifaddr
*ifp
;
1688 read_lock_bh(&idev
->lock
);
1689 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
)
1691 read_unlock_bh(&idev
->lock
);
1695 int ipv6_chk_addr(struct net
*net
, const struct in6_addr
*addr
,
1696 const struct net_device
*dev
, int strict
)
1698 return ipv6_chk_addr_and_flags(net
, addr
, dev
, strict
, IFA_F_TENTATIVE
);
1700 EXPORT_SYMBOL(ipv6_chk_addr
);
1702 int ipv6_chk_addr_and_flags(struct net
*net
, const struct in6_addr
*addr
,
1703 const struct net_device
*dev
, int strict
,
1706 struct inet6_ifaddr
*ifp
;
1707 unsigned int hash
= inet6_addr_hash(addr
);
1711 hlist_for_each_entry_rcu(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1712 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1714 /* Decouple optimistic from tentative for evaluation here.
1715 * Ban optimistic addresses explicitly, when required.
1717 ifp_flags
= (ifp
->flags
&IFA_F_OPTIMISTIC
)
1718 ? (ifp
->flags
&~IFA_F_TENTATIVE
)
1720 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1721 !(ifp_flags
&banned_flags
) &&
1722 (!dev
|| ifp
->idev
->dev
== dev
||
1723 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))) {
1724 rcu_read_unlock_bh();
1729 rcu_read_unlock_bh();
1732 EXPORT_SYMBOL(ipv6_chk_addr_and_flags
);
1734 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
1735 struct net_device
*dev
)
1737 unsigned int hash
= inet6_addr_hash(addr
);
1738 struct inet6_ifaddr
*ifp
;
1740 hlist_for_each_entry(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1741 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1743 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1744 if (!dev
|| ifp
->idev
->dev
== dev
)
1751 /* Compares an address/prefix_len with addresses on device @dev.
1752 * If one is found it returns true.
1754 bool ipv6_chk_custom_prefix(const struct in6_addr
*addr
,
1755 const unsigned int prefix_len
, struct net_device
*dev
)
1757 struct inet6_dev
*idev
;
1758 struct inet6_ifaddr
*ifa
;
1762 idev
= __in6_dev_get(dev
);
1764 read_lock_bh(&idev
->lock
);
1765 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
1766 ret
= ipv6_prefix_equal(addr
, &ifa
->addr
, prefix_len
);
1770 read_unlock_bh(&idev
->lock
);
1776 EXPORT_SYMBOL(ipv6_chk_custom_prefix
);
1778 int ipv6_chk_prefix(const struct in6_addr
*addr
, struct net_device
*dev
)
1780 struct inet6_dev
*idev
;
1781 struct inet6_ifaddr
*ifa
;
1786 idev
= __in6_dev_get(dev
);
1788 read_lock_bh(&idev
->lock
);
1789 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
1790 onlink
= ipv6_prefix_equal(addr
, &ifa
->addr
,
1795 read_unlock_bh(&idev
->lock
);
1800 EXPORT_SYMBOL(ipv6_chk_prefix
);
1802 struct inet6_ifaddr
*ipv6_get_ifaddr(struct net
*net
, const struct in6_addr
*addr
,
1803 struct net_device
*dev
, int strict
)
1805 struct inet6_ifaddr
*ifp
, *result
= NULL
;
1806 unsigned int hash
= inet6_addr_hash(addr
);
1809 hlist_for_each_entry_rcu_bh(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1810 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1812 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1813 if (!dev
|| ifp
->idev
->dev
== dev
||
1814 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1821 rcu_read_unlock_bh();
1826 /* Gets referenced address, destroys ifaddr */
1828 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
, int dad_failed
)
1831 ifp
->flags
|= IFA_F_DADFAILED
;
1833 if (ifp
->flags
&IFA_F_PERMANENT
) {
1834 spin_lock_bh(&ifp
->lock
);
1835 addrconf_del_dad_work(ifp
);
1836 ifp
->flags
|= IFA_F_TENTATIVE
;
1837 spin_unlock_bh(&ifp
->lock
);
1839 ipv6_ifa_notify(0, ifp
);
1841 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1842 struct inet6_ifaddr
*ifpub
;
1843 spin_lock_bh(&ifp
->lock
);
1846 in6_ifa_hold(ifpub
);
1847 spin_unlock_bh(&ifp
->lock
);
1848 ipv6_create_tempaddr(ifpub
, ifp
);
1851 spin_unlock_bh(&ifp
->lock
);
1859 static int addrconf_dad_end(struct inet6_ifaddr
*ifp
)
1863 spin_lock_bh(&ifp
->lock
);
1864 if (ifp
->state
== INET6_IFADDR_STATE_DAD
) {
1865 ifp
->state
= INET6_IFADDR_STATE_POSTDAD
;
1868 spin_unlock_bh(&ifp
->lock
);
1873 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1875 struct in6_addr addr
;
1876 struct inet6_dev
*idev
= ifp
->idev
;
1877 struct net
*net
= dev_net(ifp
->idev
->dev
);
1879 if (addrconf_dad_end(ifp
)) {
1884 net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n",
1885 ifp
->idev
->dev
->name
, &ifp
->addr
);
1887 spin_lock_bh(&ifp
->lock
);
1889 if (ifp
->flags
& IFA_F_STABLE_PRIVACY
) {
1890 int scope
= ifp
->scope
;
1891 u32 flags
= ifp
->flags
;
1892 struct in6_addr new_addr
;
1893 struct inet6_ifaddr
*ifp2
;
1894 u32 valid_lft
, preferred_lft
;
1895 int pfxlen
= ifp
->prefix_len
;
1896 int retries
= ifp
->stable_privacy_retry
+ 1;
1898 if (retries
> net
->ipv6
.sysctl
.idgen_retries
) {
1899 net_info_ratelimited("%s: privacy stable address generation failed because of DAD conflicts!\n",
1900 ifp
->idev
->dev
->name
);
1904 new_addr
= ifp
->addr
;
1905 if (ipv6_generate_stable_address(&new_addr
, retries
,
1909 valid_lft
= ifp
->valid_lft
;
1910 preferred_lft
= ifp
->prefered_lft
;
1912 spin_unlock_bh(&ifp
->lock
);
1914 if (idev
->cnf
.max_addresses
&&
1915 ipv6_count_addresses(idev
) >=
1916 idev
->cnf
.max_addresses
)
1919 net_info_ratelimited("%s: generating new stable privacy address because of DAD conflict\n",
1920 ifp
->idev
->dev
->name
);
1922 ifp2
= ipv6_add_addr(idev
, &new_addr
, NULL
, pfxlen
,
1923 scope
, flags
, valid_lft
,
1928 spin_lock_bh(&ifp2
->lock
);
1929 ifp2
->stable_privacy_retry
= retries
;
1930 ifp2
->state
= INET6_IFADDR_STATE_PREDAD
;
1931 spin_unlock_bh(&ifp2
->lock
);
1933 addrconf_mod_dad_work(ifp2
, net
->ipv6
.sysctl
.idgen_delay
);
1936 spin_lock_bh(&ifp
->lock
);
1937 } else if (idev
->cnf
.accept_dad
> 1 && !idev
->cnf
.disable_ipv6
) {
1938 addr
.s6_addr32
[0] = htonl(0xfe800000);
1939 addr
.s6_addr32
[1] = 0;
1941 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) &&
1942 ipv6_addr_equal(&ifp
->addr
, &addr
)) {
1943 /* DAD failed for link-local based on MAC address */
1944 idev
->cnf
.disable_ipv6
= 1;
1946 pr_info("%s: IPv6 being disabled!\n",
1947 ifp
->idev
->dev
->name
);
1952 /* transition from _POSTDAD to _ERRDAD */
1953 ifp
->state
= INET6_IFADDR_STATE_ERRDAD
;
1954 spin_unlock_bh(&ifp
->lock
);
1956 addrconf_mod_dad_work(ifp
, 0);
1959 /* Join to solicited addr multicast group.
1960 * caller must hold RTNL */
1961 void addrconf_join_solict(struct net_device
*dev
, const struct in6_addr
*addr
)
1963 struct in6_addr maddr
;
1965 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1968 addrconf_addr_solict_mult(addr
, &maddr
);
1969 ipv6_dev_mc_inc(dev
, &maddr
);
1972 /* caller must hold RTNL */
1973 void addrconf_leave_solict(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
1975 struct in6_addr maddr
;
1977 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1980 addrconf_addr_solict_mult(addr
, &maddr
);
1981 __ipv6_dev_mc_dec(idev
, &maddr
);
1984 /* caller must hold RTNL */
1985 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1987 struct in6_addr addr
;
1989 if (ifp
->prefix_len
>= 127) /* RFC 6164 */
1991 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1992 if (ipv6_addr_any(&addr
))
1994 __ipv6_dev_ac_inc(ifp
->idev
, &addr
);
1997 /* caller must hold RTNL */
1998 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
2000 struct in6_addr addr
;
2002 if (ifp
->prefix_len
>= 127) /* RFC 6164 */
2004 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
2005 if (ipv6_addr_any(&addr
))
2007 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
2010 static int addrconf_ifid_eui64(u8
*eui
, struct net_device
*dev
)
2012 if (dev
->addr_len
!= EUI64_ADDR_LEN
)
2014 memcpy(eui
, dev
->dev_addr
, EUI64_ADDR_LEN
);
2019 static int addrconf_ifid_ieee1394(u8
*eui
, struct net_device
*dev
)
2021 union fwnet_hwaddr
*ha
;
2023 if (dev
->addr_len
!= FWNET_ALEN
)
2026 ha
= (union fwnet_hwaddr
*)dev
->dev_addr
;
2028 memcpy(eui
, &ha
->uc
.uniq_id
, sizeof(ha
->uc
.uniq_id
));
2033 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
2035 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
2036 if (dev
->addr_len
!= ARCNET_ALEN
)
2039 eui
[7] = *(u8
*)dev
->dev_addr
;
2043 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
2045 if (dev
->addr_len
!= INFINIBAND_ALEN
)
2047 memcpy(eui
, dev
->dev_addr
+ 12, 8);
2052 static int __ipv6_isatap_ifid(u8
*eui
, __be32 addr
)
2056 eui
[0] = (ipv4_is_zeronet(addr
) || ipv4_is_private_10(addr
) ||
2057 ipv4_is_loopback(addr
) || ipv4_is_linklocal_169(addr
) ||
2058 ipv4_is_private_172(addr
) || ipv4_is_test_192(addr
) ||
2059 ipv4_is_anycast_6to4(addr
) || ipv4_is_private_192(addr
) ||
2060 ipv4_is_test_198(addr
) || ipv4_is_multicast(addr
) ||
2061 ipv4_is_lbcast(addr
)) ? 0x00 : 0x02;
2065 memcpy(eui
+ 4, &addr
, 4);
2069 static int addrconf_ifid_sit(u8
*eui
, struct net_device
*dev
)
2071 if (dev
->priv_flags
& IFF_ISATAP
)
2072 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
2076 static int addrconf_ifid_gre(u8
*eui
, struct net_device
*dev
)
2078 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
2081 static int addrconf_ifid_ip6tnl(u8
*eui
, struct net_device
*dev
)
2083 memcpy(eui
, dev
->perm_addr
, 3);
2084 memcpy(eui
+ 5, dev
->perm_addr
+ 3, 3);
2091 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
2093 switch (dev
->type
) {
2096 return addrconf_ifid_eui48(eui
, dev
);
2098 return addrconf_ifid_arcnet(eui
, dev
);
2099 case ARPHRD_INFINIBAND
:
2100 return addrconf_ifid_infiniband(eui
, dev
);
2102 return addrconf_ifid_sit(eui
, dev
);
2104 return addrconf_ifid_gre(eui
, dev
);
2105 case ARPHRD_6LOWPAN
:
2106 return addrconf_ifid_eui64(eui
, dev
);
2107 case ARPHRD_IEEE1394
:
2108 return addrconf_ifid_ieee1394(eui
, dev
);
2109 case ARPHRD_TUNNEL6
:
2110 return addrconf_ifid_ip6tnl(eui
, dev
);
2115 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
2118 struct inet6_ifaddr
*ifp
;
2120 read_lock_bh(&idev
->lock
);
2121 list_for_each_entry_reverse(ifp
, &idev
->addr_list
, if_list
) {
2122 if (ifp
->scope
> IFA_LINK
)
2124 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2125 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
2130 read_unlock_bh(&idev
->lock
);
2134 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
2135 static void __ipv6_regen_rndid(struct inet6_dev
*idev
)
2138 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
2139 idev
->rndid
[0] &= ~0x02;
2142 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
2143 * check if generated address is not inappropriate
2145 * - Reserved subnet anycast (RFC 2526)
2146 * 11111101 11....11 1xxxxxxx
2147 * - ISATAP (RFC4214) 6.1
2148 * 00-00-5E-FE-xx-xx-xx-xx
2150 * - XXX: already assigned to an address on the device
2152 if (idev
->rndid
[0] == 0xfd &&
2153 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
2154 (idev
->rndid
[7]&0x80))
2156 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
2157 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
2159 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
2164 static void ipv6_regen_rndid(unsigned long data
)
2166 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
2167 unsigned long expires
;
2170 write_lock_bh(&idev
->lock
);
2175 __ipv6_regen_rndid(idev
);
2178 idev
->cnf
.temp_prefered_lft
* HZ
-
2179 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
*
2180 NEIGH_VAR(idev
->nd_parms
, RETRANS_TIME
) -
2181 idev
->cnf
.max_desync_factor
* HZ
;
2182 if (time_before(expires
, jiffies
)) {
2183 pr_warn("%s: too short regeneration interval; timer disabled for %s\n",
2184 __func__
, idev
->dev
->name
);
2188 if (!mod_timer(&idev
->regen_timer
, expires
))
2192 write_unlock_bh(&idev
->lock
);
2193 rcu_read_unlock_bh();
2197 static void __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
)
2199 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
2200 __ipv6_regen_rndid(idev
);
2208 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
2209 unsigned long expires
, u32 flags
)
2211 struct fib6_config cfg
= {
2212 .fc_table
= l3mdev_fib_table(dev
) ? : RT6_TABLE_PREFIX
,
2213 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
2214 .fc_ifindex
= dev
->ifindex
,
2215 .fc_expires
= expires
,
2217 .fc_flags
= RTF_UP
| flags
,
2218 .fc_nlinfo
.nl_net
= dev_net(dev
),
2219 .fc_protocol
= RTPROT_KERNEL
,
2224 /* Prevent useless cloning on PtP SIT.
2225 This thing is done here expecting that the whole
2226 class of non-broadcast devices need not cloning.
2228 #if IS_ENABLED(CONFIG_IPV6_SIT)
2229 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
2230 cfg
.fc_flags
|= RTF_NONEXTHOP
;
2233 ip6_route_add(&cfg
);
2237 static struct rt6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
2239 const struct net_device
*dev
,
2240 u32 flags
, u32 noflags
)
2242 struct fib6_node
*fn
;
2243 struct rt6_info
*rt
= NULL
;
2244 struct fib6_table
*table
;
2245 u32 tb_id
= l3mdev_fib_table(dev
) ? : RT6_TABLE_PREFIX
;
2247 table
= fib6_get_table(dev_net(dev
), tb_id
);
2251 read_lock_bh(&table
->tb6_lock
);
2252 fn
= fib6_locate(&table
->tb6_root
, pfx
, plen
, NULL
, 0);
2256 noflags
|= RTF_CACHE
;
2257 for (rt
= fn
->leaf
; rt
; rt
= rt
->dst
.rt6_next
) {
2258 if (rt
->dst
.dev
->ifindex
!= dev
->ifindex
)
2260 if ((rt
->rt6i_flags
& flags
) != flags
)
2262 if ((rt
->rt6i_flags
& noflags
) != 0)
2268 read_unlock_bh(&table
->tb6_lock
);
2273 /* Create "default" multicast route to the interface */
2275 static void addrconf_add_mroute(struct net_device
*dev
)
2277 struct fib6_config cfg
= {
2278 .fc_table
= l3mdev_fib_table(dev
) ? : RT6_TABLE_LOCAL
,
2279 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
2280 .fc_ifindex
= dev
->ifindex
,
2283 .fc_nlinfo
.nl_net
= dev_net(dev
),
2286 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
2288 ip6_route_add(&cfg
);
2291 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
2293 struct inet6_dev
*idev
;
2297 idev
= ipv6_find_idev(dev
);
2299 return ERR_PTR(-ENOBUFS
);
2301 if (idev
->cnf
.disable_ipv6
)
2302 return ERR_PTR(-EACCES
);
2304 /* Add default multicast route */
2305 if (!(dev
->flags
& IFF_LOOPBACK
) && !netif_is_l3_master(dev
))
2306 addrconf_add_mroute(dev
);
2311 static void manage_tempaddrs(struct inet6_dev
*idev
,
2312 struct inet6_ifaddr
*ifp
,
2313 __u32 valid_lft
, __u32 prefered_lft
,
2314 bool create
, unsigned long now
)
2317 struct inet6_ifaddr
*ift
;
2319 read_lock_bh(&idev
->lock
);
2320 /* update all temporary addresses in the list */
2321 list_for_each_entry(ift
, &idev
->tempaddr_list
, tmp_list
) {
2322 int age
, max_valid
, max_prefered
;
2324 if (ifp
!= ift
->ifpub
)
2327 /* RFC 4941 section 3.3:
2328 * If a received option will extend the lifetime of a public
2329 * address, the lifetimes of temporary addresses should
2330 * be extended, subject to the overall constraint that no
2331 * temporary addresses should ever remain "valid" or "preferred"
2332 * for a time longer than (TEMP_VALID_LIFETIME) or
2333 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), respectively.
2335 age
= (now
- ift
->cstamp
) / HZ
;
2336 max_valid
= idev
->cnf
.temp_valid_lft
- age
;
2340 max_prefered
= idev
->cnf
.temp_prefered_lft
-
2341 idev
->cnf
.max_desync_factor
- age
;
2342 if (max_prefered
< 0)
2345 if (valid_lft
> max_valid
)
2346 valid_lft
= max_valid
;
2348 if (prefered_lft
> max_prefered
)
2349 prefered_lft
= max_prefered
;
2351 spin_lock(&ift
->lock
);
2353 ift
->valid_lft
= valid_lft
;
2354 ift
->prefered_lft
= prefered_lft
;
2356 if (prefered_lft
> 0)
2357 ift
->flags
&= ~IFA_F_DEPRECATED
;
2359 spin_unlock(&ift
->lock
);
2360 if (!(flags
&IFA_F_TENTATIVE
))
2361 ipv6_ifa_notify(0, ift
);
2364 if ((create
|| list_empty(&idev
->tempaddr_list
)) &&
2365 idev
->cnf
.use_tempaddr
> 0) {
2366 /* When a new public address is created as described
2367 * in [ADDRCONF], also create a new temporary address.
2368 * Also create a temporary address if it's enabled but
2369 * no temporary address currently exists.
2371 read_unlock_bh(&idev
->lock
);
2372 ipv6_create_tempaddr(ifp
, NULL
);
2374 read_unlock_bh(&idev
->lock
);
2378 static bool is_addr_mode_generate_stable(struct inet6_dev
*idev
)
2380 return idev
->addr_gen_mode
== IN6_ADDR_GEN_MODE_STABLE_PRIVACY
||
2381 idev
->addr_gen_mode
== IN6_ADDR_GEN_MODE_RANDOM
;
2384 int addrconf_prefix_rcv_add_addr(struct net
*net
, struct net_device
*dev
,
2385 const struct prefix_info
*pinfo
,
2386 struct inet6_dev
*in6_dev
,
2387 const struct in6_addr
*addr
, int addr_type
,
2388 u32 addr_flags
, bool sllao
, bool tokenized
,
2389 __u32 valid_lft
, u32 prefered_lft
)
2391 struct inet6_ifaddr
*ifp
= ipv6_get_ifaddr(net
, addr
, dev
, 1);
2392 int create
= 0, update_lft
= 0;
2394 if (!ifp
&& valid_lft
) {
2395 int max_addresses
= in6_dev
->cnf
.max_addresses
;
2397 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2398 if (in6_dev
->cnf
.optimistic_dad
&&
2399 !net
->ipv6
.devconf_all
->forwarding
&& sllao
)
2400 addr_flags
|= IFA_F_OPTIMISTIC
;
2403 /* Do not allow to create too much of autoconfigured
2404 * addresses; this would be too easy way to crash kernel.
2406 if (!max_addresses
||
2407 ipv6_count_addresses(in6_dev
) < max_addresses
)
2408 ifp
= ipv6_add_addr(in6_dev
, addr
, NULL
,
2410 addr_type
&IPV6_ADDR_SCOPE_MASK
,
2411 addr_flags
, valid_lft
,
2414 if (IS_ERR_OR_NULL(ifp
))
2419 spin_lock_bh(&ifp
->lock
);
2420 ifp
->flags
|= IFA_F_MANAGETEMPADDR
;
2421 ifp
->cstamp
= jiffies
;
2422 ifp
->tokenized
= tokenized
;
2423 spin_unlock_bh(&ifp
->lock
);
2424 addrconf_dad_start(ifp
);
2432 /* update lifetime (RFC2462 5.5.3 e) */
2433 spin_lock_bh(&ifp
->lock
);
2435 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
2436 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
2439 if (!update_lft
&& !create
&& stored_lft
) {
2440 const u32 minimum_lft
= min_t(u32
,
2441 stored_lft
, MIN_VALID_LIFETIME
);
2442 valid_lft
= max(valid_lft
, minimum_lft
);
2444 /* RFC4862 Section 5.5.3e:
2445 * "Note that the preferred lifetime of the
2446 * corresponding address is always reset to
2447 * the Preferred Lifetime in the received
2448 * Prefix Information option, regardless of
2449 * whether the valid lifetime is also reset or
2452 * So we should always update prefered_lft here.
2458 ifp
->valid_lft
= valid_lft
;
2459 ifp
->prefered_lft
= prefered_lft
;
2462 ifp
->flags
&= ~IFA_F_DEPRECATED
;
2463 spin_unlock_bh(&ifp
->lock
);
2465 if (!(flags
&IFA_F_TENTATIVE
))
2466 ipv6_ifa_notify(0, ifp
);
2468 spin_unlock_bh(&ifp
->lock
);
2470 manage_tempaddrs(in6_dev
, ifp
, valid_lft
, prefered_lft
,
2479 EXPORT_SYMBOL_GPL(addrconf_prefix_rcv_add_addr
);
2481 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
, bool sllao
)
2483 struct prefix_info
*pinfo
;
2488 struct inet6_dev
*in6_dev
;
2489 struct net
*net
= dev_net(dev
);
2491 pinfo
= (struct prefix_info
*) opt
;
2493 if (len
< sizeof(struct prefix_info
)) {
2494 ADBG("addrconf: prefix option too short\n");
2499 * Validation checks ([ADDRCONF], page 19)
2502 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
2504 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
2507 valid_lft
= ntohl(pinfo
->valid
);
2508 prefered_lft
= ntohl(pinfo
->prefered
);
2510 if (prefered_lft
> valid_lft
) {
2511 net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n");
2515 in6_dev
= in6_dev_get(dev
);
2518 net_dbg_ratelimited("addrconf: device %s not configured\n",
2524 * Two things going on here:
2525 * 1) Add routes for on-link prefixes
2526 * 2) Configure prefixes with the auto flag set
2529 if (pinfo
->onlink
) {
2530 struct rt6_info
*rt
;
2531 unsigned long rt_expires
;
2533 /* Avoid arithmetic overflow. Really, we could
2534 * save rt_expires in seconds, likely valid_lft,
2535 * but it would require division in fib gc, that it
2539 rt_expires
= addrconf_timeout_fixup(valid_lft
, HZ
);
2541 rt_expires
= addrconf_timeout_fixup(valid_lft
, USER_HZ
);
2543 if (addrconf_finite_timeout(rt_expires
))
2546 rt
= addrconf_get_prefix_route(&pinfo
->prefix
,
2549 RTF_ADDRCONF
| RTF_PREFIX_RT
,
2550 RTF_GATEWAY
| RTF_DEFAULT
);
2553 /* Autoconf prefix route */
2554 if (valid_lft
== 0) {
2557 } else if (addrconf_finite_timeout(rt_expires
)) {
2559 rt6_set_expires(rt
, jiffies
+ rt_expires
);
2561 rt6_clean_expires(rt
);
2563 } else if (valid_lft
) {
2564 clock_t expires
= 0;
2565 int flags
= RTF_ADDRCONF
| RTF_PREFIX_RT
;
2566 if (addrconf_finite_timeout(rt_expires
)) {
2568 flags
|= RTF_EXPIRES
;
2569 expires
= jiffies_to_clock_t(rt_expires
);
2571 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
2572 dev
, expires
, flags
);
2577 /* Try to figure out our local address for this prefix */
2579 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
2580 struct in6_addr addr
;
2581 bool tokenized
= false, dev_addr_generated
= false;
2583 if (pinfo
->prefix_len
== 64) {
2584 memcpy(&addr
, &pinfo
->prefix
, 8);
2586 if (!ipv6_addr_any(&in6_dev
->token
)) {
2587 read_lock_bh(&in6_dev
->lock
);
2588 memcpy(addr
.s6_addr
+ 8,
2589 in6_dev
->token
.s6_addr
+ 8, 8);
2590 read_unlock_bh(&in6_dev
->lock
);
2592 } else if (is_addr_mode_generate_stable(in6_dev
) &&
2593 !ipv6_generate_stable_address(&addr
, 0,
2595 addr_flags
|= IFA_F_STABLE_PRIVACY
;
2597 } else if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
2598 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
2601 dev_addr_generated
= true;
2605 net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n",
2610 err
= addrconf_prefix_rcv_add_addr(net
, dev
, pinfo
, in6_dev
,
2613 tokenized
, valid_lft
,
2618 /* Ignore error case here because previous prefix add addr was
2619 * successful which will be notified.
2621 ndisc_ops_prefix_rcv_add_addr(net
, dev
, pinfo
, in6_dev
, &addr
,
2622 addr_type
, addr_flags
, sllao
,
2623 tokenized
, valid_lft
,
2625 dev_addr_generated
);
2627 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
2629 in6_dev_put(in6_dev
);
2633 * Set destination address.
2634 * Special case for SIT interfaces where we create a new "virtual"
2637 int addrconf_set_dstaddr(struct net
*net
, void __user
*arg
)
2639 struct in6_ifreq ireq
;
2640 struct net_device
*dev
;
2646 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2649 dev
= __dev_get_by_index(net
, ireq
.ifr6_ifindex
);
2655 #if IS_ENABLED(CONFIG_IPV6_SIT)
2656 if (dev
->type
== ARPHRD_SIT
) {
2657 const struct net_device_ops
*ops
= dev
->netdev_ops
;
2659 struct ip_tunnel_parm p
;
2661 err
= -EADDRNOTAVAIL
;
2662 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
2665 memset(&p
, 0, sizeof(p
));
2666 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
2670 p
.iph
.protocol
= IPPROTO_IPV6
;
2672 ifr
.ifr_ifru
.ifru_data
= (__force
void __user
*)&p
;
2674 if (ops
->ndo_do_ioctl
) {
2675 mm_segment_t oldfs
= get_fs();
2678 err
= ops
->ndo_do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
2685 dev
= __dev_get_by_name(net
, p
.name
);
2688 err
= dev_open(dev
);
2698 static int ipv6_mc_config(struct sock
*sk
, bool join
,
2699 const struct in6_addr
*addr
, int ifindex
)
2707 ret
= ipv6_sock_mc_join(sk
, ifindex
, addr
);
2709 ret
= ipv6_sock_mc_drop(sk
, ifindex
, addr
);
2716 * Manual configuration of address on an interface
2718 static int inet6_addr_add(struct net
*net
, int ifindex
,
2719 const struct in6_addr
*pfx
,
2720 const struct in6_addr
*peer_pfx
,
2721 unsigned int plen
, __u32 ifa_flags
,
2722 __u32 prefered_lft
, __u32 valid_lft
)
2724 struct inet6_ifaddr
*ifp
;
2725 struct inet6_dev
*idev
;
2726 struct net_device
*dev
;
2727 unsigned long timeout
;
2737 /* check the lifetime */
2738 if (!valid_lft
|| prefered_lft
> valid_lft
)
2741 if (ifa_flags
& IFA_F_MANAGETEMPADDR
&& plen
!= 64)
2744 dev
= __dev_get_by_index(net
, ifindex
);
2748 idev
= addrconf_add_dev(dev
);
2750 return PTR_ERR(idev
);
2752 if (ifa_flags
& IFA_F_MCAUTOJOIN
) {
2753 int ret
= ipv6_mc_config(net
->ipv6
.mc_autojoin_sk
,
2754 true, pfx
, ifindex
);
2760 scope
= ipv6_addr_scope(pfx
);
2762 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
2763 if (addrconf_finite_timeout(timeout
)) {
2764 expires
= jiffies_to_clock_t(timeout
* HZ
);
2765 valid_lft
= timeout
;
2766 flags
= RTF_EXPIRES
;
2770 ifa_flags
|= IFA_F_PERMANENT
;
2773 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
2774 if (addrconf_finite_timeout(timeout
)) {
2776 ifa_flags
|= IFA_F_DEPRECATED
;
2777 prefered_lft
= timeout
;
2780 ifp
= ipv6_add_addr(idev
, pfx
, peer_pfx
, plen
, scope
, ifa_flags
,
2781 valid_lft
, prefered_lft
);
2784 if (!(ifa_flags
& IFA_F_NOPREFIXROUTE
)) {
2785 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
2790 * Note that section 3.1 of RFC 4429 indicates
2791 * that the Optimistic flag should not be set for
2792 * manually configured addresses
2794 addrconf_dad_start(ifp
);
2795 if (ifa_flags
& IFA_F_MANAGETEMPADDR
)
2796 manage_tempaddrs(idev
, ifp
, valid_lft
, prefered_lft
,
2799 addrconf_verify_rtnl();
2801 } else if (ifa_flags
& IFA_F_MCAUTOJOIN
) {
2802 ipv6_mc_config(net
->ipv6
.mc_autojoin_sk
,
2803 false, pfx
, ifindex
);
2806 return PTR_ERR(ifp
);
2809 static int inet6_addr_del(struct net
*net
, int ifindex
, u32 ifa_flags
,
2810 const struct in6_addr
*pfx
, unsigned int plen
)
2812 struct inet6_ifaddr
*ifp
;
2813 struct inet6_dev
*idev
;
2814 struct net_device
*dev
;
2819 dev
= __dev_get_by_index(net
, ifindex
);
2823 idev
= __in6_dev_get(dev
);
2827 read_lock_bh(&idev
->lock
);
2828 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
2829 if (ifp
->prefix_len
== plen
&&
2830 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
2832 read_unlock_bh(&idev
->lock
);
2834 if (!(ifp
->flags
& IFA_F_TEMPORARY
) &&
2835 (ifa_flags
& IFA_F_MANAGETEMPADDR
))
2836 manage_tempaddrs(idev
, ifp
, 0, 0, false,
2839 addrconf_verify_rtnl();
2840 if (ipv6_addr_is_multicast(pfx
)) {
2841 ipv6_mc_config(net
->ipv6
.mc_autojoin_sk
,
2842 false, pfx
, dev
->ifindex
);
2847 read_unlock_bh(&idev
->lock
);
2848 return -EADDRNOTAVAIL
;
2852 int addrconf_add_ifaddr(struct net
*net
, void __user
*arg
)
2854 struct in6_ifreq ireq
;
2857 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
2860 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2864 err
= inet6_addr_add(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, NULL
,
2865 ireq
.ifr6_prefixlen
, IFA_F_PERMANENT
,
2866 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2871 int addrconf_del_ifaddr(struct net
*net
, void __user
*arg
)
2873 struct in6_ifreq ireq
;
2876 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
2879 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2883 err
= inet6_addr_del(net
, ireq
.ifr6_ifindex
, 0, &ireq
.ifr6_addr
,
2884 ireq
.ifr6_prefixlen
);
2889 static void add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
2890 int plen
, int scope
)
2892 struct inet6_ifaddr
*ifp
;
2894 ifp
= ipv6_add_addr(idev
, addr
, NULL
, plen
,
2895 scope
, IFA_F_PERMANENT
,
2896 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2898 spin_lock_bh(&ifp
->lock
);
2899 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2900 spin_unlock_bh(&ifp
->lock
);
2901 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2906 #if IS_ENABLED(CONFIG_IPV6_SIT)
2907 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
2909 struct in6_addr addr
;
2910 struct net_device
*dev
;
2911 struct net
*net
= dev_net(idev
->dev
);
2917 memset(&addr
, 0, sizeof(struct in6_addr
));
2918 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
2920 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
2921 addr
.s6_addr32
[0] = htonl(0xfe800000);
2925 scope
= IPV6_ADDR_COMPATv4
;
2927 pflags
|= RTF_NONEXTHOP
;
2930 if (addr
.s6_addr32
[3]) {
2931 add_addr(idev
, &addr
, plen
, scope
);
2932 addrconf_prefix_route(&addr
, plen
, idev
->dev
, 0, pflags
);
2936 for_each_netdev(net
, dev
) {
2937 struct in_device
*in_dev
= __in_dev_get_rtnl(dev
);
2938 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
2939 struct in_ifaddr
*ifa
;
2943 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
2945 addr
.s6_addr32
[3] = ifa
->ifa_local
;
2947 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
2949 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
2950 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2955 add_addr(idev
, &addr
, plen
, flag
);
2956 addrconf_prefix_route(&addr
, plen
, idev
->dev
, 0,
2964 static void init_loopback(struct net_device
*dev
)
2966 struct inet6_dev
*idev
;
2967 struct net_device
*sp_dev
;
2968 struct inet6_ifaddr
*sp_ifa
;
2969 struct rt6_info
*sp_rt
;
2975 idev
= ipv6_find_idev(dev
);
2977 pr_debug("%s: add_dev failed\n", __func__
);
2981 add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
);
2983 /* Add routes to other interface's IPv6 addresses */
2984 for_each_netdev(dev_net(dev
), sp_dev
) {
2985 if (!strcmp(sp_dev
->name
, dev
->name
))
2988 idev
= __in6_dev_get(sp_dev
);
2992 read_lock_bh(&idev
->lock
);
2993 list_for_each_entry(sp_ifa
, &idev
->addr_list
, if_list
) {
2995 if (sp_ifa
->flags
& (IFA_F_DADFAILED
| IFA_F_TENTATIVE
))
2999 /* This dst has been added to garbage list when
3000 * lo device down, release this obsolete dst and
3001 * reallocate a new router for ifa.
3003 if (sp_ifa
->rt
->dst
.obsolete
> 0) {
3004 ip6_rt_put(sp_ifa
->rt
);
3011 sp_rt
= addrconf_dst_alloc(idev
, &sp_ifa
->addr
, false);
3013 /* Failure cases are ignored */
3014 if (!IS_ERR(sp_rt
)) {
3019 read_unlock_bh(&idev
->lock
);
3023 void addrconf_add_linklocal(struct inet6_dev
*idev
,
3024 const struct in6_addr
*addr
, u32 flags
)
3026 struct inet6_ifaddr
*ifp
;
3027 u32 addr_flags
= flags
| IFA_F_PERMANENT
;
3029 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3030 if (idev
->cnf
.optimistic_dad
&&
3031 !dev_net(idev
->dev
)->ipv6
.devconf_all
->forwarding
)
3032 addr_flags
|= IFA_F_OPTIMISTIC
;
3035 ifp
= ipv6_add_addr(idev
, addr
, NULL
, 64, IFA_LINK
, addr_flags
,
3036 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
3038 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
3039 addrconf_dad_start(ifp
);
3043 EXPORT_SYMBOL_GPL(addrconf_add_linklocal
);
3045 static bool ipv6_reserved_interfaceid(struct in6_addr address
)
3047 if ((address
.s6_addr32
[2] | address
.s6_addr32
[3]) == 0)
3050 if (address
.s6_addr32
[2] == htonl(0x02005eff) &&
3051 ((address
.s6_addr32
[3] & htonl(0xfe000000)) == htonl(0xfe000000)))
3054 if (address
.s6_addr32
[2] == htonl(0xfdffffff) &&
3055 ((address
.s6_addr32
[3] & htonl(0xffffff80)) == htonl(0xffffff80)))
3061 static int ipv6_generate_stable_address(struct in6_addr
*address
,
3063 const struct inet6_dev
*idev
)
3065 static DEFINE_SPINLOCK(lock
);
3066 static __u32 digest
[SHA_DIGEST_WORDS
];
3067 static __u32 workspace
[SHA_WORKSPACE_WORDS
];
3070 char __data
[SHA_MESSAGE_BYTES
];
3072 struct in6_addr secret
;
3074 unsigned char hwaddr
[MAX_ADDR_LEN
];
3079 struct in6_addr secret
;
3080 struct in6_addr temp
;
3081 struct net
*net
= dev_net(idev
->dev
);
3083 BUILD_BUG_ON(sizeof(data
.__data
) != sizeof(data
));
3085 if (idev
->cnf
.stable_secret
.initialized
)
3086 secret
= idev
->cnf
.stable_secret
.secret
;
3087 else if (net
->ipv6
.devconf_dflt
->stable_secret
.initialized
)
3088 secret
= net
->ipv6
.devconf_dflt
->stable_secret
.secret
;
3093 spin_lock_bh(&lock
);
3096 memset(&data
, 0, sizeof(data
));
3097 memset(workspace
, 0, sizeof(workspace
));
3098 memcpy(data
.hwaddr
, idev
->dev
->perm_addr
, idev
->dev
->addr_len
);
3099 data
.prefix
[0] = address
->s6_addr32
[0];
3100 data
.prefix
[1] = address
->s6_addr32
[1];
3101 data
.secret
= secret
;
3102 data
.dad_count
= dad_count
;
3104 sha_transform(digest
, data
.__data
, workspace
);
3107 temp
.s6_addr32
[2] = (__force __be32
)digest
[0];
3108 temp
.s6_addr32
[3] = (__force __be32
)digest
[1];
3110 spin_unlock_bh(&lock
);
3112 if (ipv6_reserved_interfaceid(temp
)) {
3114 if (dad_count
> dev_net(idev
->dev
)->ipv6
.sysctl
.idgen_retries
)
3123 static void ipv6_gen_mode_random_init(struct inet6_dev
*idev
)
3125 struct ipv6_stable_secret
*s
= &idev
->cnf
.stable_secret
;
3129 s
= &idev
->cnf
.stable_secret
;
3130 get_random_bytes(&s
->secret
, sizeof(s
->secret
));
3131 s
->initialized
= true;
3134 static void addrconf_addr_gen(struct inet6_dev
*idev
, bool prefix_route
)
3136 struct in6_addr addr
;
3138 /* no link local addresses on L3 master devices */
3139 if (netif_is_l3_master(idev
->dev
))
3142 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
3144 switch (idev
->addr_gen_mode
) {
3145 case IN6_ADDR_GEN_MODE_RANDOM
:
3146 ipv6_gen_mode_random_init(idev
);
3148 case IN6_ADDR_GEN_MODE_STABLE_PRIVACY
:
3149 if (!ipv6_generate_stable_address(&addr
, 0, idev
))
3150 addrconf_add_linklocal(idev
, &addr
,
3151 IFA_F_STABLE_PRIVACY
);
3152 else if (prefix_route
)
3153 addrconf_prefix_route(&addr
, 64, idev
->dev
, 0, 0);
3155 case IN6_ADDR_GEN_MODE_EUI64
:
3156 /* addrconf_add_linklocal also adds a prefix_route and we
3157 * only need to care about prefix routes if ipv6_generate_eui64
3158 * couldn't generate one.
3160 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) == 0)
3161 addrconf_add_linklocal(idev
, &addr
, 0);
3162 else if (prefix_route
)
3163 addrconf_prefix_route(&addr
, 64, idev
->dev
, 0, 0);
3165 case IN6_ADDR_GEN_MODE_NONE
:
3167 /* will not add any link local address */
3172 static void addrconf_dev_config(struct net_device
*dev
)
3174 struct inet6_dev
*idev
;
3178 if ((dev
->type
!= ARPHRD_ETHER
) &&
3179 (dev
->type
!= ARPHRD_FDDI
) &&
3180 (dev
->type
!= ARPHRD_ARCNET
) &&
3181 (dev
->type
!= ARPHRD_INFINIBAND
) &&
3182 (dev
->type
!= ARPHRD_IEEE1394
) &&
3183 (dev
->type
!= ARPHRD_TUNNEL6
) &&
3184 (dev
->type
!= ARPHRD_6LOWPAN
) &&
3185 (dev
->type
!= ARPHRD_NONE
)) {
3186 /* Alas, we support only Ethernet autoconfiguration. */
3190 idev
= addrconf_add_dev(dev
);
3194 /* this device type has no EUI support */
3195 if (dev
->type
== ARPHRD_NONE
&&
3196 idev
->addr_gen_mode
== IN6_ADDR_GEN_MODE_EUI64
)
3197 idev
->addr_gen_mode
= IN6_ADDR_GEN_MODE_RANDOM
;
3199 addrconf_addr_gen(idev
, false);
3202 #if IS_ENABLED(CONFIG_IPV6_SIT)
3203 static void addrconf_sit_config(struct net_device
*dev
)
3205 struct inet6_dev
*idev
;
3210 * Configure the tunnel with one of our IPv4
3211 * addresses... we should configure all of
3212 * our v4 addrs in the tunnel
3215 idev
= ipv6_find_idev(dev
);
3217 pr_debug("%s: add_dev failed\n", __func__
);
3221 if (dev
->priv_flags
& IFF_ISATAP
) {
3222 addrconf_addr_gen(idev
, false);
3226 sit_add_v4_addrs(idev
);
3228 if (dev
->flags
&IFF_POINTOPOINT
)
3229 addrconf_add_mroute(dev
);
3233 #if IS_ENABLED(CONFIG_NET_IPGRE)
3234 static void addrconf_gre_config(struct net_device
*dev
)
3236 struct inet6_dev
*idev
;
3240 idev
= ipv6_find_idev(dev
);
3242 pr_debug("%s: add_dev failed\n", __func__
);
3246 addrconf_addr_gen(idev
, true);
3247 if (dev
->flags
& IFF_POINTOPOINT
)
3248 addrconf_add_mroute(dev
);
3252 static int fixup_permanent_addr(struct inet6_dev
*idev
,
3253 struct inet6_ifaddr
*ifp
)
3256 struct rt6_info
*rt
;
3258 rt
= addrconf_dst_alloc(idev
, &ifp
->addr
, false);
3259 if (unlikely(IS_ERR(rt
)))
3265 if (!(ifp
->flags
& IFA_F_NOPREFIXROUTE
)) {
3266 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
,
3270 addrconf_dad_start(ifp
);
3275 static void addrconf_permanent_addr(struct net_device
*dev
)
3277 struct inet6_ifaddr
*ifp
, *tmp
;
3278 struct inet6_dev
*idev
;
3280 idev
= __in6_dev_get(dev
);
3284 write_lock_bh(&idev
->lock
);
3286 list_for_each_entry_safe(ifp
, tmp
, &idev
->addr_list
, if_list
) {
3287 if ((ifp
->flags
& IFA_F_PERMANENT
) &&
3288 fixup_permanent_addr(idev
, ifp
) < 0) {
3289 write_unlock_bh(&idev
->lock
);
3291 write_lock_bh(&idev
->lock
);
3293 net_info_ratelimited("%s: Failed to add prefix route for address %pI6c; dropping\n",
3294 idev
->dev
->name
, &ifp
->addr
);
3298 write_unlock_bh(&idev
->lock
);
3301 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
3304 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
3305 struct netdev_notifier_changeupper_info
*info
;
3306 struct inet6_dev
*idev
= __in6_dev_get(dev
);
3307 int run_pending
= 0;
3311 case NETDEV_REGISTER
:
3312 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
3313 idev
= ipv6_add_dev(dev
);
3315 return notifier_from_errno(PTR_ERR(idev
));
3319 case NETDEV_CHANGEMTU
:
3320 /* if MTU under IPV6_MIN_MTU stop IPv6 on this interface. */
3321 if (dev
->mtu
< IPV6_MIN_MTU
) {
3322 addrconf_ifdown(dev
, 1);
3327 rt6_mtu_change(dev
, dev
->mtu
);
3328 idev
->cnf
.mtu6
= dev
->mtu
;
3332 /* allocate new idev */
3333 idev
= ipv6_add_dev(dev
);
3337 /* device is still not ready */
3338 if (!(idev
->if_flags
& IF_READY
))
3347 if (dev
->flags
& IFF_SLAVE
)
3350 if (idev
&& idev
->cnf
.disable_ipv6
)
3353 if (event
== NETDEV_UP
) {
3354 /* restore routes for permanent addresses */
3355 addrconf_permanent_addr(dev
);
3357 if (!addrconf_qdisc_ok(dev
)) {
3358 /* device is not ready yet. */
3359 pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n",
3364 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
3365 idev
= ipv6_add_dev(dev
);
3367 if (!IS_ERR_OR_NULL(idev
)) {
3368 idev
->if_flags
|= IF_READY
;
3371 } else if (event
== NETDEV_CHANGE
) {
3372 if (!addrconf_qdisc_ok(dev
)) {
3373 /* device is still not ready. */
3378 if (idev
->if_flags
& IF_READY
)
3379 /* device is already configured. */
3381 idev
->if_flags
|= IF_READY
;
3384 pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n",
3390 switch (dev
->type
) {
3391 #if IS_ENABLED(CONFIG_IPV6_SIT)
3393 addrconf_sit_config(dev
);
3396 #if IS_ENABLED(CONFIG_NET_IPGRE)
3398 addrconf_gre_config(dev
);
3401 case ARPHRD_LOOPBACK
:
3406 addrconf_dev_config(dev
);
3410 if (!IS_ERR_OR_NULL(idev
)) {
3412 addrconf_dad_run(idev
);
3415 * If the MTU changed during the interface down,
3416 * when the interface up, the changed MTU must be
3417 * reflected in the idev as well as routers.
3419 if (idev
->cnf
.mtu6
!= dev
->mtu
&&
3420 dev
->mtu
>= IPV6_MIN_MTU
) {
3421 rt6_mtu_change(dev
, dev
->mtu
);
3422 idev
->cnf
.mtu6
= dev
->mtu
;
3424 idev
->tstamp
= jiffies
;
3425 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
3428 * If the changed mtu during down is lower than
3429 * IPV6_MIN_MTU stop IPv6 on this interface.
3431 if (dev
->mtu
< IPV6_MIN_MTU
)
3432 addrconf_ifdown(dev
, 1);
3437 case NETDEV_UNREGISTER
:
3439 * Remove all addresses from this interface.
3441 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
3444 case NETDEV_CHANGENAME
:
3446 snmp6_unregister_dev(idev
);
3447 addrconf_sysctl_unregister(idev
);
3448 err
= addrconf_sysctl_register(idev
);
3450 return notifier_from_errno(err
);
3451 err
= snmp6_register_dev(idev
);
3453 addrconf_sysctl_unregister(idev
);
3454 return notifier_from_errno(err
);
3459 case NETDEV_PRE_TYPE_CHANGE
:
3460 case NETDEV_POST_TYPE_CHANGE
:
3462 addrconf_type_change(dev
, event
);
3465 case NETDEV_CHANGEUPPER
:
3468 /* flush all routes if dev is linked to or unlinked from
3469 * an L3 master device (e.g., VRF)
3471 if (info
->upper_dev
&& netif_is_l3_master(info
->upper_dev
))
3472 addrconf_ifdown(dev
, 0);
3479 * addrconf module should be notified of a device going up
3481 static struct notifier_block ipv6_dev_notf
= {
3482 .notifier_call
= addrconf_notify
,
3485 static void addrconf_type_change(struct net_device
*dev
, unsigned long event
)
3487 struct inet6_dev
*idev
;
3490 idev
= __in6_dev_get(dev
);
3492 if (event
== NETDEV_POST_TYPE_CHANGE
)
3493 ipv6_mc_remap(idev
);
3494 else if (event
== NETDEV_PRE_TYPE_CHANGE
)
3495 ipv6_mc_unmap(idev
);
3498 static bool addr_is_local(const struct in6_addr
*addr
)
3500 return ipv6_addr_type(addr
) &
3501 (IPV6_ADDR_LINKLOCAL
| IPV6_ADDR_LOOPBACK
);
3504 static int addrconf_ifdown(struct net_device
*dev
, int how
)
3506 struct net
*net
= dev_net(dev
);
3507 struct inet6_dev
*idev
;
3508 struct inet6_ifaddr
*ifa
, *tmp
;
3509 struct list_head del_list
;
3516 rt6_ifdown(net
, dev
);
3517 neigh_ifdown(&nd_tbl
, dev
);
3519 idev
= __in6_dev_get(dev
);
3524 * Step 1: remove reference to ipv6 device from parent device.
3530 /* protected by rtnl_lock */
3531 RCU_INIT_POINTER(dev
->ip6_ptr
, NULL
);
3533 /* Step 1.5: remove snmp6 entry */
3534 snmp6_unregister_dev(idev
);
3538 /* aggregate the system setting and interface setting */
3539 _keep_addr
= net
->ipv6
.devconf_all
->keep_addr_on_down
;
3541 _keep_addr
= idev
->cnf
.keep_addr_on_down
;
3543 /* combine the user config with event to determine if permanent
3544 * addresses are to be removed from address hash table
3546 keep_addr
= !(how
|| _keep_addr
<= 0);
3548 /* Step 2: clear hash table */
3549 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
3550 struct hlist_head
*h
= &inet6_addr_lst
[i
];
3552 spin_lock_bh(&addrconf_hash_lock
);
3554 hlist_for_each_entry_rcu(ifa
, h
, addr_lst
) {
3555 if (ifa
->idev
== idev
) {
3556 addrconf_del_dad_work(ifa
);
3557 /* combined flag + permanent flag decide if
3558 * address is retained on a down event
3561 !(ifa
->flags
& IFA_F_PERMANENT
) ||
3562 addr_is_local(&ifa
->addr
)) {
3563 hlist_del_init_rcu(&ifa
->addr_lst
);
3568 spin_unlock_bh(&addrconf_hash_lock
);
3571 write_lock_bh(&idev
->lock
);
3573 addrconf_del_rs_timer(idev
);
3575 /* Step 2: clear flags for stateless addrconf */
3577 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
3579 if (how
&& del_timer(&idev
->regen_timer
))
3582 /* Step 3: clear tempaddr list */
3583 while (!list_empty(&idev
->tempaddr_list
)) {
3584 ifa
= list_first_entry(&idev
->tempaddr_list
,
3585 struct inet6_ifaddr
, tmp_list
);
3586 list_del(&ifa
->tmp_list
);
3587 write_unlock_bh(&idev
->lock
);
3588 spin_lock_bh(&ifa
->lock
);
3591 in6_ifa_put(ifa
->ifpub
);
3594 spin_unlock_bh(&ifa
->lock
);
3596 write_lock_bh(&idev
->lock
);
3599 /* re-combine the user config with event to determine if permanent
3600 * addresses are to be removed from the interface list
3602 keep_addr
= (!how
&& _keep_addr
> 0);
3604 INIT_LIST_HEAD(&del_list
);
3605 list_for_each_entry_safe(ifa
, tmp
, &idev
->addr_list
, if_list
) {
3606 struct rt6_info
*rt
= NULL
;
3608 addrconf_del_dad_work(ifa
);
3610 write_unlock_bh(&idev
->lock
);
3611 spin_lock_bh(&ifa
->lock
);
3613 if (keep_addr
&& (ifa
->flags
& IFA_F_PERMANENT
) &&
3614 !addr_is_local(&ifa
->addr
)) {
3615 /* set state to skip the notifier below */
3616 state
= INET6_IFADDR_STATE_DEAD
;
3618 if (!(ifa
->flags
& IFA_F_NODAD
))
3619 ifa
->flags
|= IFA_F_TENTATIVE
;
3625 ifa
->state
= INET6_IFADDR_STATE_DEAD
;
3627 list_del(&ifa
->if_list
);
3628 list_add(&ifa
->if_list
, &del_list
);
3631 spin_unlock_bh(&ifa
->lock
);
3636 if (state
!= INET6_IFADDR_STATE_DEAD
) {
3637 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
3638 inet6addr_notifier_call_chain(NETDEV_DOWN
, ifa
);
3640 if (idev
->cnf
.forwarding
)
3641 addrconf_leave_anycast(ifa
);
3642 addrconf_leave_solict(ifa
->idev
, &ifa
->addr
);
3645 write_lock_bh(&idev
->lock
);
3648 write_unlock_bh(&idev
->lock
);
3650 /* now clean up addresses to be removed */
3651 while (!list_empty(&del_list
)) {
3652 ifa
= list_first_entry(&del_list
,
3653 struct inet6_ifaddr
, if_list
);
3654 list_del(&ifa
->if_list
);
3659 /* Step 5: Discard anycast and multicast list */
3661 ipv6_ac_destroy_dev(idev
);
3662 ipv6_mc_destroy_dev(idev
);
3667 idev
->tstamp
= jiffies
;
3669 /* Last: Shot the device (if unregistered) */
3671 addrconf_sysctl_unregister(idev
);
3672 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
3673 neigh_ifdown(&nd_tbl
, dev
);
3679 static void addrconf_rs_timer(unsigned long data
)
3681 struct inet6_dev
*idev
= (struct inet6_dev
*)data
;
3682 struct net_device
*dev
= idev
->dev
;
3683 struct in6_addr lladdr
;
3685 write_lock(&idev
->lock
);
3686 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
))
3689 if (!ipv6_accept_ra(idev
))
3692 /* Announcement received after solicitation was sent */
3693 if (idev
->if_flags
& IF_RA_RCVD
)
3696 if (idev
->rs_probes
++ < idev
->cnf
.rtr_solicits
) {
3697 write_unlock(&idev
->lock
);
3698 if (!ipv6_get_lladdr(dev
, &lladdr
, IFA_F_TENTATIVE
))
3699 ndisc_send_rs(dev
, &lladdr
,
3700 &in6addr_linklocal_allrouters
);
3704 write_lock(&idev
->lock
);
3705 /* The wait after the last probe can be shorter */
3706 addrconf_mod_rs_timer(idev
, (idev
->rs_probes
==
3707 idev
->cnf
.rtr_solicits
) ?
3708 idev
->cnf
.rtr_solicit_delay
:
3709 idev
->cnf
.rtr_solicit_interval
);
3712 * Note: we do not support deprecated "all on-link"
3713 * assumption any longer.
3715 pr_debug("%s: no IPv6 routers present\n", idev
->dev
->name
);
3719 write_unlock(&idev
->lock
);
3725 * Duplicate Address Detection
3727 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
3729 unsigned long rand_num
;
3730 struct inet6_dev
*idev
= ifp
->idev
;
3732 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
3735 rand_num
= prandom_u32() % (idev
->cnf
.rtr_solicit_delay
? : 1);
3737 ifp
->dad_probes
= idev
->cnf
.dad_transmits
;
3738 addrconf_mod_dad_work(ifp
, rand_num
);
3741 static void addrconf_dad_begin(struct inet6_ifaddr
*ifp
)
3743 struct inet6_dev
*idev
= ifp
->idev
;
3744 struct net_device
*dev
= idev
->dev
;
3745 bool notify
= false;
3747 addrconf_join_solict(dev
, &ifp
->addr
);
3749 prandom_seed((__force u32
) ifp
->addr
.s6_addr32
[3]);
3751 read_lock_bh(&idev
->lock
);
3752 spin_lock(&ifp
->lock
);
3753 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
)
3756 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
3757 idev
->cnf
.accept_dad
< 1 ||
3758 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
3759 ifp
->flags
& IFA_F_NODAD
) {
3760 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3761 spin_unlock(&ifp
->lock
);
3762 read_unlock_bh(&idev
->lock
);
3764 addrconf_dad_completed(ifp
);
3768 if (!(idev
->if_flags
& IF_READY
)) {
3769 spin_unlock(&ifp
->lock
);
3770 read_unlock_bh(&idev
->lock
);
3772 * If the device is not ready:
3773 * - keep it tentative if it is a permanent address.
3774 * - otherwise, kill it.
3777 addrconf_dad_stop(ifp
, 0);
3782 * Optimistic nodes can start receiving
3785 if (ifp
->flags
& IFA_F_OPTIMISTIC
) {
3786 ip6_ins_rt(ifp
->rt
);
3787 if (ipv6_use_optimistic_addr(idev
)) {
3788 /* Because optimistic nodes can use this address,
3789 * notify listeners. If DAD fails, RTM_DELADDR is sent.
3795 addrconf_dad_kick(ifp
);
3797 spin_unlock(&ifp
->lock
);
3798 read_unlock_bh(&idev
->lock
);
3800 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
3803 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
)
3805 bool begin_dad
= false;
3807 spin_lock_bh(&ifp
->lock
);
3808 if (ifp
->state
!= INET6_IFADDR_STATE_DEAD
) {
3809 ifp
->state
= INET6_IFADDR_STATE_PREDAD
;
3812 spin_unlock_bh(&ifp
->lock
);
3815 addrconf_mod_dad_work(ifp
, 0);
3818 static void addrconf_dad_work(struct work_struct
*w
)
3820 struct inet6_ifaddr
*ifp
= container_of(to_delayed_work(w
),
3821 struct inet6_ifaddr
,
3823 struct inet6_dev
*idev
= ifp
->idev
;
3824 struct in6_addr mcaddr
;
3830 } action
= DAD_PROCESS
;
3834 spin_lock_bh(&ifp
->lock
);
3835 if (ifp
->state
== INET6_IFADDR_STATE_PREDAD
) {
3837 ifp
->state
= INET6_IFADDR_STATE_DAD
;
3838 } else if (ifp
->state
== INET6_IFADDR_STATE_ERRDAD
) {
3840 ifp
->state
= INET6_IFADDR_STATE_POSTDAD
;
3842 spin_unlock_bh(&ifp
->lock
);
3844 if (action
== DAD_BEGIN
) {
3845 addrconf_dad_begin(ifp
);
3847 } else if (action
== DAD_ABORT
) {
3848 addrconf_dad_stop(ifp
, 1);
3852 if (!ifp
->dad_probes
&& addrconf_dad_end(ifp
))
3855 write_lock_bh(&idev
->lock
);
3856 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
)) {
3857 write_unlock_bh(&idev
->lock
);
3861 spin_lock(&ifp
->lock
);
3862 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
) {
3863 spin_unlock(&ifp
->lock
);
3864 write_unlock_bh(&idev
->lock
);
3868 if (ifp
->dad_probes
== 0) {
3870 * DAD was successful
3873 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3874 spin_unlock(&ifp
->lock
);
3875 write_unlock_bh(&idev
->lock
);
3877 addrconf_dad_completed(ifp
);
3883 addrconf_mod_dad_work(ifp
,
3884 NEIGH_VAR(ifp
->idev
->nd_parms
, RETRANS_TIME
));
3885 spin_unlock(&ifp
->lock
);
3886 write_unlock_bh(&idev
->lock
);
3888 /* send a neighbour solicitation for our addr */
3889 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
3890 ndisc_send_ns(ifp
->idev
->dev
, &ifp
->addr
, &mcaddr
, &in6addr_any
);
3896 /* ifp->idev must be at least read locked */
3897 static bool ipv6_lonely_lladdr(struct inet6_ifaddr
*ifp
)
3899 struct inet6_ifaddr
*ifpiter
;
3900 struct inet6_dev
*idev
= ifp
->idev
;
3902 list_for_each_entry_reverse(ifpiter
, &idev
->addr_list
, if_list
) {
3903 if (ifpiter
->scope
> IFA_LINK
)
3905 if (ifp
!= ifpiter
&& ifpiter
->scope
== IFA_LINK
&&
3906 (ifpiter
->flags
& (IFA_F_PERMANENT
|IFA_F_TENTATIVE
|
3907 IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
)) ==
3914 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
3916 struct net_device
*dev
= ifp
->idev
->dev
;
3917 struct in6_addr lladdr
;
3918 bool send_rs
, send_mld
;
3920 addrconf_del_dad_work(ifp
);
3923 * Configure the address for reception. Now it is valid.
3926 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
3928 /* If added prefix is link local and we are prepared to process
3929 router advertisements, start sending router solicitations.
3932 read_lock_bh(&ifp
->idev
->lock
);
3933 send_mld
= ifp
->scope
== IFA_LINK
&& ipv6_lonely_lladdr(ifp
);
3934 send_rs
= send_mld
&&
3935 ipv6_accept_ra(ifp
->idev
) &&
3936 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
3937 (dev
->flags
&IFF_LOOPBACK
) == 0;
3938 read_unlock_bh(&ifp
->idev
->lock
);
3940 /* While dad is in progress mld report's source address is in6_addrany.
3941 * Resend with proper ll now.
3944 ipv6_mc_dad_complete(ifp
->idev
);
3948 * If a host as already performed a random delay
3949 * [...] as part of DAD [...] there is no need
3950 * to delay again before sending the first RS
3952 if (ipv6_get_lladdr(dev
, &lladdr
, IFA_F_TENTATIVE
))
3954 ndisc_send_rs(dev
, &lladdr
, &in6addr_linklocal_allrouters
);
3956 write_lock_bh(&ifp
->idev
->lock
);
3957 spin_lock(&ifp
->lock
);
3958 ifp
->idev
->rs_probes
= 1;
3959 ifp
->idev
->if_flags
|= IF_RS_SENT
;
3960 addrconf_mod_rs_timer(ifp
->idev
,
3961 ifp
->idev
->cnf
.rtr_solicit_interval
);
3962 spin_unlock(&ifp
->lock
);
3963 write_unlock_bh(&ifp
->idev
->lock
);
3967 static void addrconf_dad_run(struct inet6_dev
*idev
)
3969 struct inet6_ifaddr
*ifp
;
3971 read_lock_bh(&idev
->lock
);
3972 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
3973 spin_lock(&ifp
->lock
);
3974 if (ifp
->flags
& IFA_F_TENTATIVE
&&
3975 ifp
->state
== INET6_IFADDR_STATE_DAD
)
3976 addrconf_dad_kick(ifp
);
3977 spin_unlock(&ifp
->lock
);
3979 read_unlock_bh(&idev
->lock
);
3982 #ifdef CONFIG_PROC_FS
3983 struct if6_iter_state
{
3984 struct seq_net_private p
;
3989 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
, loff_t pos
)
3991 struct inet6_ifaddr
*ifa
= NULL
;
3992 struct if6_iter_state
*state
= seq
->private;
3993 struct net
*net
= seq_file_net(seq
);
3996 /* initial bucket if pos is 0 */
4002 for (; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
4003 hlist_for_each_entry_rcu_bh(ifa
, &inet6_addr_lst
[state
->bucket
],
4005 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
4007 /* sync with offset */
4008 if (p
< state
->offset
) {
4016 /* prepare for next bucket */
4023 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
,
4024 struct inet6_ifaddr
*ifa
)
4026 struct if6_iter_state
*state
= seq
->private;
4027 struct net
*net
= seq_file_net(seq
);
4029 hlist_for_each_entry_continue_rcu_bh(ifa
, addr_lst
) {
4030 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
4036 while (++state
->bucket
< IN6_ADDR_HSIZE
) {
4038 hlist_for_each_entry_rcu_bh(ifa
,
4039 &inet6_addr_lst
[state
->bucket
], addr_lst
) {
4040 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
4050 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
4054 return if6_get_first(seq
, *pos
);
4057 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
4059 struct inet6_ifaddr
*ifa
;
4061 ifa
= if6_get_next(seq
, v
);
4066 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
4069 rcu_read_unlock_bh();
4072 static int if6_seq_show(struct seq_file
*seq
, void *v
)
4074 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
4075 seq_printf(seq
, "%pi6 %02x %02x %02x %02x %8s\n",
4077 ifp
->idev
->dev
->ifindex
,
4081 ifp
->idev
->dev
->name
);
4085 static const struct seq_operations if6_seq_ops
= {
4086 .start
= if6_seq_start
,
4087 .next
= if6_seq_next
,
4088 .show
= if6_seq_show
,
4089 .stop
= if6_seq_stop
,
4092 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
4094 return seq_open_net(inode
, file
, &if6_seq_ops
,
4095 sizeof(struct if6_iter_state
));
4098 static const struct file_operations if6_fops
= {
4099 .owner
= THIS_MODULE
,
4100 .open
= if6_seq_open
,
4102 .llseek
= seq_lseek
,
4103 .release
= seq_release_net
,
4106 static int __net_init
if6_proc_net_init(struct net
*net
)
4108 if (!proc_create("if_inet6", S_IRUGO
, net
->proc_net
, &if6_fops
))
4113 static void __net_exit
if6_proc_net_exit(struct net
*net
)
4115 remove_proc_entry("if_inet6", net
->proc_net
);
4118 static struct pernet_operations if6_proc_net_ops
= {
4119 .init
= if6_proc_net_init
,
4120 .exit
= if6_proc_net_exit
,
4123 int __init
if6_proc_init(void)
4125 return register_pernet_subsys(&if6_proc_net_ops
);
4128 void if6_proc_exit(void)
4130 unregister_pernet_subsys(&if6_proc_net_ops
);
4132 #endif /* CONFIG_PROC_FS */
4134 #if IS_ENABLED(CONFIG_IPV6_MIP6)
4135 /* Check if address is a home address configured on any interface. */
4136 int ipv6_chk_home_addr(struct net
*net
, const struct in6_addr
*addr
)
4139 struct inet6_ifaddr
*ifp
= NULL
;
4140 unsigned int hash
= inet6_addr_hash(addr
);
4143 hlist_for_each_entry_rcu_bh(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
4144 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
4146 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
4147 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
4152 rcu_read_unlock_bh();
4158 * Periodic address status verification
4161 static void addrconf_verify_rtnl(void)
4163 unsigned long now
, next
, next_sec
, next_sched
;
4164 struct inet6_ifaddr
*ifp
;
4171 next
= round_jiffies_up(now
+ ADDR_CHECK_FREQUENCY
);
4173 cancel_delayed_work(&addr_chk_work
);
4175 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
4177 hlist_for_each_entry_rcu_bh(ifp
, &inet6_addr_lst
[i
], addr_lst
) {
4180 /* When setting preferred_lft to a value not zero or
4181 * infinity, while valid_lft is infinity
4182 * IFA_F_PERMANENT has a non-infinity life time.
4184 if ((ifp
->flags
& IFA_F_PERMANENT
) &&
4185 (ifp
->prefered_lft
== INFINITY_LIFE_TIME
))
4188 spin_lock(&ifp
->lock
);
4189 /* We try to batch several events at once. */
4190 age
= (now
- ifp
->tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
4192 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
4193 age
>= ifp
->valid_lft
) {
4194 spin_unlock(&ifp
->lock
);
4198 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
4199 spin_unlock(&ifp
->lock
);
4201 } else if (age
>= ifp
->prefered_lft
) {
4202 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
4205 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
4207 ifp
->flags
|= IFA_F_DEPRECATED
;
4210 if ((ifp
->valid_lft
!= INFINITY_LIFE_TIME
) &&
4211 (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
)))
4212 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
4214 spin_unlock(&ifp
->lock
);
4219 ipv6_ifa_notify(0, ifp
);
4223 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
4224 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
4225 unsigned long regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
4226 ifp
->idev
->cnf
.dad_transmits
*
4227 NEIGH_VAR(ifp
->idev
->nd_parms
, RETRANS_TIME
) / HZ
;
4229 if (age
>= ifp
->prefered_lft
- regen_advance
) {
4230 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
4231 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
4232 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
4233 if (!ifp
->regen_count
&& ifpub
) {
4236 in6_ifa_hold(ifpub
);
4237 spin_unlock(&ifp
->lock
);
4239 spin_lock(&ifpub
->lock
);
4240 ifpub
->regen_count
= 0;
4241 spin_unlock(&ifpub
->lock
);
4242 ipv6_create_tempaddr(ifpub
, ifp
);
4247 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
4248 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
4249 spin_unlock(&ifp
->lock
);
4251 /* ifp->prefered_lft <= ifp->valid_lft */
4252 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
4253 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
4254 spin_unlock(&ifp
->lock
);
4259 next_sec
= round_jiffies_up(next
);
4262 /* If rounded timeout is accurate enough, accept it. */
4263 if (time_before(next_sec
, next
+ ADDRCONF_TIMER_FUZZ
))
4264 next_sched
= next_sec
;
4266 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
4267 if (time_before(next_sched
, jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
))
4268 next_sched
= jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
;
4270 ADBG(KERN_DEBUG
"now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
4271 now
, next
, next_sec
, next_sched
);
4272 mod_delayed_work(addrconf_wq
, &addr_chk_work
, next_sched
- now
);
4273 rcu_read_unlock_bh();
4276 static void addrconf_verify_work(struct work_struct
*w
)
4279 addrconf_verify_rtnl();
4283 static void addrconf_verify(void)
4285 mod_delayed_work(addrconf_wq
, &addr_chk_work
, 0);
4288 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
,
4289 struct in6_addr
**peer_pfx
)
4291 struct in6_addr
*pfx
= NULL
;
4296 pfx
= nla_data(addr
);
4299 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
4301 pfx
= nla_data(local
);
4307 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
4308 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
4309 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
4310 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
4311 [IFA_FLAGS
] = { .len
= sizeof(u32
) },
4315 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
4317 struct net
*net
= sock_net(skb
->sk
);
4318 struct ifaddrmsg
*ifm
;
4319 struct nlattr
*tb
[IFA_MAX
+1];
4320 struct in6_addr
*pfx
, *peer_pfx
;
4324 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
4328 ifm
= nlmsg_data(nlh
);
4329 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer_pfx
);
4333 ifa_flags
= tb
[IFA_FLAGS
] ? nla_get_u32(tb
[IFA_FLAGS
]) : ifm
->ifa_flags
;
4335 /* We ignore other flags so far. */
4336 ifa_flags
&= IFA_F_MANAGETEMPADDR
;
4338 return inet6_addr_del(net
, ifm
->ifa_index
, ifa_flags
, pfx
,
4339 ifm
->ifa_prefixlen
);
4342 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u32 ifa_flags
,
4343 u32 prefered_lft
, u32 valid_lft
)
4347 unsigned long timeout
;
4348 bool was_managetempaddr
;
4349 bool had_prefixroute
;
4353 if (!valid_lft
|| (prefered_lft
> valid_lft
))
4356 if (ifa_flags
& IFA_F_MANAGETEMPADDR
&&
4357 (ifp
->flags
& IFA_F_TEMPORARY
|| ifp
->prefix_len
!= 64))
4360 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
4361 if (addrconf_finite_timeout(timeout
)) {
4362 expires
= jiffies_to_clock_t(timeout
* HZ
);
4363 valid_lft
= timeout
;
4364 flags
= RTF_EXPIRES
;
4368 ifa_flags
|= IFA_F_PERMANENT
;
4371 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
4372 if (addrconf_finite_timeout(timeout
)) {
4374 ifa_flags
|= IFA_F_DEPRECATED
;
4375 prefered_lft
= timeout
;
4378 spin_lock_bh(&ifp
->lock
);
4379 was_managetempaddr
= ifp
->flags
& IFA_F_MANAGETEMPADDR
;
4380 had_prefixroute
= ifp
->flags
& IFA_F_PERMANENT
&&
4381 !(ifp
->flags
& IFA_F_NOPREFIXROUTE
);
4382 ifp
->flags
&= ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
|
4383 IFA_F_HOMEADDRESS
| IFA_F_MANAGETEMPADDR
|
4384 IFA_F_NOPREFIXROUTE
);
4385 ifp
->flags
|= ifa_flags
;
4386 ifp
->tstamp
= jiffies
;
4387 ifp
->valid_lft
= valid_lft
;
4388 ifp
->prefered_lft
= prefered_lft
;
4390 spin_unlock_bh(&ifp
->lock
);
4391 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
4392 ipv6_ifa_notify(0, ifp
);
4394 if (!(ifa_flags
& IFA_F_NOPREFIXROUTE
)) {
4395 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
4397 } else if (had_prefixroute
) {
4398 enum cleanup_prefix_rt_t action
;
4399 unsigned long rt_expires
;
4401 write_lock_bh(&ifp
->idev
->lock
);
4402 action
= check_cleanup_prefix_route(ifp
, &rt_expires
);
4403 write_unlock_bh(&ifp
->idev
->lock
);
4405 if (action
!= CLEANUP_PREFIX_RT_NOP
) {
4406 cleanup_prefix_route(ifp
, rt_expires
,
4407 action
== CLEANUP_PREFIX_RT_DEL
);
4411 if (was_managetempaddr
|| ifp
->flags
& IFA_F_MANAGETEMPADDR
) {
4412 if (was_managetempaddr
&& !(ifp
->flags
& IFA_F_MANAGETEMPADDR
))
4413 valid_lft
= prefered_lft
= 0;
4414 manage_tempaddrs(ifp
->idev
, ifp
, valid_lft
, prefered_lft
,
4415 !was_managetempaddr
, jiffies
);
4418 addrconf_verify_rtnl();
4424 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
4426 struct net
*net
= sock_net(skb
->sk
);
4427 struct ifaddrmsg
*ifm
;
4428 struct nlattr
*tb
[IFA_MAX
+1];
4429 struct in6_addr
*pfx
, *peer_pfx
;
4430 struct inet6_ifaddr
*ifa
;
4431 struct net_device
*dev
;
4432 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
4436 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
4440 ifm
= nlmsg_data(nlh
);
4441 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer_pfx
);
4445 if (tb
[IFA_CACHEINFO
]) {
4446 struct ifa_cacheinfo
*ci
;
4448 ci
= nla_data(tb
[IFA_CACHEINFO
]);
4449 valid_lft
= ci
->ifa_valid
;
4450 preferred_lft
= ci
->ifa_prefered
;
4452 preferred_lft
= INFINITY_LIFE_TIME
;
4453 valid_lft
= INFINITY_LIFE_TIME
;
4456 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
4460 ifa_flags
= tb
[IFA_FLAGS
] ? nla_get_u32(tb
[IFA_FLAGS
]) : ifm
->ifa_flags
;
4462 /* We ignore other flags so far. */
4463 ifa_flags
&= IFA_F_NODAD
| IFA_F_HOMEADDRESS
| IFA_F_MANAGETEMPADDR
|
4464 IFA_F_NOPREFIXROUTE
| IFA_F_MCAUTOJOIN
;
4466 ifa
= ipv6_get_ifaddr(net
, pfx
, dev
, 1);
4469 * It would be best to check for !NLM_F_CREATE here but
4470 * userspace already relies on not having to provide this.
4472 return inet6_addr_add(net
, ifm
->ifa_index
, pfx
, peer_pfx
,
4473 ifm
->ifa_prefixlen
, ifa_flags
,
4474 preferred_lft
, valid_lft
);
4477 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
4478 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
4481 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
4488 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u32 flags
,
4489 u8 scope
, int ifindex
)
4491 struct ifaddrmsg
*ifm
;
4493 ifm
= nlmsg_data(nlh
);
4494 ifm
->ifa_family
= AF_INET6
;
4495 ifm
->ifa_prefixlen
= prefixlen
;
4496 ifm
->ifa_flags
= flags
;
4497 ifm
->ifa_scope
= scope
;
4498 ifm
->ifa_index
= ifindex
;
4501 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
4502 unsigned long tstamp
, u32 preferred
, u32 valid
)
4504 struct ifa_cacheinfo ci
;
4506 ci
.cstamp
= cstamp_delta(cstamp
);
4507 ci
.tstamp
= cstamp_delta(tstamp
);
4508 ci
.ifa_prefered
= preferred
;
4509 ci
.ifa_valid
= valid
;
4511 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
4514 static inline int rt_scope(int ifa_scope
)
4516 if (ifa_scope
& IFA_HOST
)
4517 return RT_SCOPE_HOST
;
4518 else if (ifa_scope
& IFA_LINK
)
4519 return RT_SCOPE_LINK
;
4520 else if (ifa_scope
& IFA_SITE
)
4521 return RT_SCOPE_SITE
;
4523 return RT_SCOPE_UNIVERSE
;
4526 static inline int inet6_ifaddr_msgsize(void)
4528 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
4529 + nla_total_size(16) /* IFA_LOCAL */
4530 + nla_total_size(16) /* IFA_ADDRESS */
4531 + nla_total_size(sizeof(struct ifa_cacheinfo
))
4532 + nla_total_size(4) /* IFA_FLAGS */;
4535 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
4536 u32 portid
, u32 seq
, int event
, unsigned int flags
)
4538 struct nlmsghdr
*nlh
;
4539 u32 preferred
, valid
;
4541 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
4545 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
4546 ifa
->idev
->dev
->ifindex
);
4548 if (!((ifa
->flags
&IFA_F_PERMANENT
) &&
4549 (ifa
->prefered_lft
== INFINITY_LIFE_TIME
))) {
4550 preferred
= ifa
->prefered_lft
;
4551 valid
= ifa
->valid_lft
;
4552 if (preferred
!= INFINITY_LIFE_TIME
) {
4553 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
4554 if (preferred
> tval
)
4558 if (valid
!= INFINITY_LIFE_TIME
) {
4566 preferred
= INFINITY_LIFE_TIME
;
4567 valid
= INFINITY_LIFE_TIME
;
4570 if (!ipv6_addr_any(&ifa
->peer_addr
)) {
4571 if (nla_put_in6_addr(skb
, IFA_LOCAL
, &ifa
->addr
) < 0 ||
4572 nla_put_in6_addr(skb
, IFA_ADDRESS
, &ifa
->peer_addr
) < 0)
4575 if (nla_put_in6_addr(skb
, IFA_ADDRESS
, &ifa
->addr
) < 0)
4578 if (put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0)
4581 if (nla_put_u32(skb
, IFA_FLAGS
, ifa
->flags
) < 0)
4584 nlmsg_end(skb
, nlh
);
4588 nlmsg_cancel(skb
, nlh
);
4592 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
4593 u32 portid
, u32 seq
, int event
, u16 flags
)
4595 struct nlmsghdr
*nlh
;
4596 u8 scope
= RT_SCOPE_UNIVERSE
;
4597 int ifindex
= ifmca
->idev
->dev
->ifindex
;
4599 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
4600 scope
= RT_SCOPE_SITE
;
4602 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
4606 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
4607 if (nla_put_in6_addr(skb
, IFA_MULTICAST
, &ifmca
->mca_addr
) < 0 ||
4608 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
4609 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
4610 nlmsg_cancel(skb
, nlh
);
4614 nlmsg_end(skb
, nlh
);
4618 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
4619 u32 portid
, u32 seq
, int event
, unsigned int flags
)
4621 struct nlmsghdr
*nlh
;
4622 u8 scope
= RT_SCOPE_UNIVERSE
;
4623 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
4625 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
4626 scope
= RT_SCOPE_SITE
;
4628 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
4632 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
4633 if (nla_put_in6_addr(skb
, IFA_ANYCAST
, &ifaca
->aca_addr
) < 0 ||
4634 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
4635 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
4636 nlmsg_cancel(skb
, nlh
);
4640 nlmsg_end(skb
, nlh
);
4650 /* called with rcu_read_lock() */
4651 static int in6_dump_addrs(struct inet6_dev
*idev
, struct sk_buff
*skb
,
4652 struct netlink_callback
*cb
, enum addr_type_t type
,
4653 int s_ip_idx
, int *p_ip_idx
)
4655 struct ifmcaddr6
*ifmca
;
4656 struct ifacaddr6
*ifaca
;
4658 int ip_idx
= *p_ip_idx
;
4660 read_lock_bh(&idev
->lock
);
4662 case UNICAST_ADDR
: {
4663 struct inet6_ifaddr
*ifa
;
4665 /* unicast address incl. temp addr */
4666 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
4667 if (++ip_idx
< s_ip_idx
)
4669 err
= inet6_fill_ifaddr(skb
, ifa
,
4670 NETLINK_CB(cb
->skb
).portid
,
4676 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
4680 case MULTICAST_ADDR
:
4681 /* multicast address */
4682 for (ifmca
= idev
->mc_list
; ifmca
;
4683 ifmca
= ifmca
->next
, ip_idx
++) {
4684 if (ip_idx
< s_ip_idx
)
4686 err
= inet6_fill_ifmcaddr(skb
, ifmca
,
4687 NETLINK_CB(cb
->skb
).portid
,
4696 /* anycast address */
4697 for (ifaca
= idev
->ac_list
; ifaca
;
4698 ifaca
= ifaca
->aca_next
, ip_idx
++) {
4699 if (ip_idx
< s_ip_idx
)
4701 err
= inet6_fill_ifacaddr(skb
, ifaca
,
4702 NETLINK_CB(cb
->skb
).portid
,
4713 read_unlock_bh(&idev
->lock
);
4718 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
4719 enum addr_type_t type
)
4721 struct net
*net
= sock_net(skb
->sk
);
4724 int s_idx
, s_ip_idx
;
4725 struct net_device
*dev
;
4726 struct inet6_dev
*idev
;
4727 struct hlist_head
*head
;
4730 s_idx
= idx
= cb
->args
[1];
4731 s_ip_idx
= ip_idx
= cb
->args
[2];
4734 cb
->seq
= atomic_read(&net
->ipv6
.dev_addr_genid
) ^ net
->dev_base_seq
;
4735 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
4737 head
= &net
->dev_index_head
[h
];
4738 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
4741 if (h
> s_h
|| idx
> s_idx
)
4744 idev
= __in6_dev_get(dev
);
4748 if (in6_dump_addrs(idev
, skb
, cb
, type
,
4749 s_ip_idx
, &ip_idx
) < 0)
4759 cb
->args
[2] = ip_idx
;
4764 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4766 enum addr_type_t type
= UNICAST_ADDR
;
4768 return inet6_dump_addr(skb
, cb
, type
);
4771 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4773 enum addr_type_t type
= MULTICAST_ADDR
;
4775 return inet6_dump_addr(skb
, cb
, type
);
4779 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4781 enum addr_type_t type
= ANYCAST_ADDR
;
4783 return inet6_dump_addr(skb
, cb
, type
);
4786 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
*nlh
)
4788 struct net
*net
= sock_net(in_skb
->sk
);
4789 struct ifaddrmsg
*ifm
;
4790 struct nlattr
*tb
[IFA_MAX
+1];
4791 struct in6_addr
*addr
= NULL
, *peer
;
4792 struct net_device
*dev
= NULL
;
4793 struct inet6_ifaddr
*ifa
;
4794 struct sk_buff
*skb
;
4797 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
4801 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer
);
4807 ifm
= nlmsg_data(nlh
);
4809 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
4811 ifa
= ipv6_get_ifaddr(net
, addr
, dev
, 1);
4813 err
= -EADDRNOTAVAIL
;
4817 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
);
4823 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).portid
,
4824 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
4826 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4827 WARN_ON(err
== -EMSGSIZE
);
4831 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).portid
);
4838 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
4840 struct sk_buff
*skb
;
4841 struct net
*net
= dev_net(ifa
->idev
->dev
);
4844 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
4848 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
4850 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4851 WARN_ON(err
== -EMSGSIZE
);
4855 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
4859 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
4862 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
4863 __s32
*array
, int bytes
)
4865 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
4867 memset(array
, 0, bytes
);
4868 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
4869 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
4870 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
4871 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
4872 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
4873 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
4874 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
4875 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
4876 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] =
4877 jiffies_to_msecs(cnf
->rtr_solicit_interval
);
4878 array
[DEVCONF_RTR_SOLICIT_DELAY
] =
4879 jiffies_to_msecs(cnf
->rtr_solicit_delay
);
4880 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
4881 array
[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL
] =
4882 jiffies_to_msecs(cnf
->mldv1_unsolicited_report_interval
);
4883 array
[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL
] =
4884 jiffies_to_msecs(cnf
->mldv2_unsolicited_report_interval
);
4885 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
4886 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
4887 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
4888 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
4889 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
4890 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
4891 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
4892 array
[DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT
] = cnf
->accept_ra_min_hop_limit
;
4893 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
4894 #ifdef CONFIG_IPV6_ROUTER_PREF
4895 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
4896 array
[DEVCONF_RTR_PROBE_INTERVAL
] =
4897 jiffies_to_msecs(cnf
->rtr_probe_interval
);
4898 #ifdef CONFIG_IPV6_ROUTE_INFO
4899 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
4902 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
4903 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
4904 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4905 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
4906 array
[DEVCONF_USE_OPTIMISTIC
] = cnf
->use_optimistic
;
4908 #ifdef CONFIG_IPV6_MROUTE
4909 array
[DEVCONF_MC_FORWARDING
] = cnf
->mc_forwarding
;
4911 array
[DEVCONF_DISABLE_IPV6
] = cnf
->disable_ipv6
;
4912 array
[DEVCONF_ACCEPT_DAD
] = cnf
->accept_dad
;
4913 array
[DEVCONF_FORCE_TLLAO
] = cnf
->force_tllao
;
4914 array
[DEVCONF_NDISC_NOTIFY
] = cnf
->ndisc_notify
;
4915 array
[DEVCONF_SUPPRESS_FRAG_NDISC
] = cnf
->suppress_frag_ndisc
;
4916 array
[DEVCONF_ACCEPT_RA_FROM_LOCAL
] = cnf
->accept_ra_from_local
;
4917 array
[DEVCONF_ACCEPT_RA_MTU
] = cnf
->accept_ra_mtu
;
4918 array
[DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN
] = cnf
->ignore_routes_with_linkdown
;
4919 /* we omit DEVCONF_STABLE_SECRET for now */
4920 array
[DEVCONF_USE_OIF_ADDRS_ONLY
] = cnf
->use_oif_addrs_only
;
4921 array
[DEVCONF_DROP_UNICAST_IN_L2_MULTICAST
] = cnf
->drop_unicast_in_l2_multicast
;
4922 array
[DEVCONF_DROP_UNSOLICITED_NA
] = cnf
->drop_unsolicited_na
;
4923 array
[DEVCONF_KEEP_ADDR_ON_DOWN
] = cnf
->keep_addr_on_down
;
4926 static inline size_t inet6_ifla6_size(void)
4928 return nla_total_size(4) /* IFLA_INET6_FLAGS */
4929 + nla_total_size(sizeof(struct ifla_cacheinfo
))
4930 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
4931 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
4932 + nla_total_size(ICMP6_MIB_MAX
* 8) /* IFLA_INET6_ICMP6STATS */
4933 + nla_total_size(sizeof(struct in6_addr
)); /* IFLA_INET6_TOKEN */
4936 static inline size_t inet6_if_nlmsg_size(void)
4938 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
4939 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
4940 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
4941 + nla_total_size(4) /* IFLA_MTU */
4942 + nla_total_size(4) /* IFLA_LINK */
4943 + nla_total_size(1) /* IFLA_OPERSTATE */
4944 + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
4947 static inline void __snmp6_fill_statsdev(u64
*stats
, atomic_long_t
*mib
,
4948 int items
, int bytes
)
4951 int pad
= bytes
- sizeof(u64
) * items
;
4954 /* Use put_unaligned() because stats may not be aligned for u64. */
4955 put_unaligned(items
, &stats
[0]);
4956 for (i
= 1; i
< items
; i
++)
4957 put_unaligned(atomic_long_read(&mib
[i
]), &stats
[i
]);
4959 memset(&stats
[items
], 0, pad
);
4962 static inline void __snmp6_fill_stats64(u64
*stats
, void __percpu
*mib
,
4963 int bytes
, size_t syncpoff
)
4966 u64 buff
[IPSTATS_MIB_MAX
];
4967 int pad
= bytes
- sizeof(u64
) * IPSTATS_MIB_MAX
;
4971 memset(buff
, 0, sizeof(buff
));
4972 buff
[0] = IPSTATS_MIB_MAX
;
4974 for_each_possible_cpu(c
) {
4975 for (i
= 1; i
< IPSTATS_MIB_MAX
; i
++)
4976 buff
[i
] += snmp_get_cpu_field64(mib
, c
, i
, syncpoff
);
4979 memcpy(stats
, buff
, IPSTATS_MIB_MAX
* sizeof(u64
));
4980 memset(&stats
[IPSTATS_MIB_MAX
], 0, pad
);
4983 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
4987 case IFLA_INET6_STATS
:
4988 __snmp6_fill_stats64(stats
, idev
->stats
.ipv6
, bytes
,
4989 offsetof(struct ipstats_mib
, syncp
));
4991 case IFLA_INET6_ICMP6STATS
:
4992 __snmp6_fill_statsdev(stats
, idev
->stats
.icmpv6dev
->mibs
, ICMP6_MIB_MAX
, bytes
);
4997 static int inet6_fill_ifla6_attrs(struct sk_buff
*skb
, struct inet6_dev
*idev
,
4998 u32 ext_filter_mask
)
5001 struct ifla_cacheinfo ci
;
5003 if (nla_put_u32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
))
5004 goto nla_put_failure
;
5005 ci
.max_reasm_len
= IPV6_MAXPLEN
;
5006 ci
.tstamp
= cstamp_delta(idev
->tstamp
);
5007 ci
.reachable_time
= jiffies_to_msecs(idev
->nd_parms
->reachable_time
);
5008 ci
.retrans_time
= jiffies_to_msecs(NEIGH_VAR(idev
->nd_parms
, RETRANS_TIME
));
5009 if (nla_put(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
))
5010 goto nla_put_failure
;
5011 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
5013 goto nla_put_failure
;
5014 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
5016 /* XXX - MC not implemented */
5018 if (ext_filter_mask
& RTEXT_FILTER_SKIP_STATS
)
5021 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
5023 goto nla_put_failure
;
5024 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
5026 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
5028 goto nla_put_failure
;
5029 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
5031 nla
= nla_reserve(skb
, IFLA_INET6_TOKEN
, sizeof(struct in6_addr
));
5033 goto nla_put_failure
;
5035 if (nla_put_u8(skb
, IFLA_INET6_ADDR_GEN_MODE
, idev
->addr_gen_mode
))
5036 goto nla_put_failure
;
5038 read_lock_bh(&idev
->lock
);
5039 memcpy(nla_data(nla
), idev
->token
.s6_addr
, nla_len(nla
));
5040 read_unlock_bh(&idev
->lock
);
5048 static size_t inet6_get_link_af_size(const struct net_device
*dev
,
5049 u32 ext_filter_mask
)
5051 if (!__in6_dev_get(dev
))
5054 return inet6_ifla6_size();
5057 static int inet6_fill_link_af(struct sk_buff
*skb
, const struct net_device
*dev
,
5058 u32 ext_filter_mask
)
5060 struct inet6_dev
*idev
= __in6_dev_get(dev
);
5065 if (inet6_fill_ifla6_attrs(skb
, idev
, ext_filter_mask
) < 0)
5071 static int inet6_set_iftoken(struct inet6_dev
*idev
, struct in6_addr
*token
)
5073 struct inet6_ifaddr
*ifp
;
5074 struct net_device
*dev
= idev
->dev
;
5075 bool clear_token
, update_rs
= false;
5076 struct in6_addr ll_addr
;
5082 if (dev
->flags
& (IFF_LOOPBACK
| IFF_NOARP
))
5084 if (!ipv6_accept_ra(idev
))
5086 if (idev
->cnf
.rtr_solicits
<= 0)
5089 write_lock_bh(&idev
->lock
);
5091 BUILD_BUG_ON(sizeof(token
->s6_addr
) != 16);
5092 memcpy(idev
->token
.s6_addr
+ 8, token
->s6_addr
+ 8, 8);
5094 write_unlock_bh(&idev
->lock
);
5096 clear_token
= ipv6_addr_any(token
);
5100 if (!idev
->dead
&& (idev
->if_flags
& IF_READY
) &&
5101 !ipv6_get_lladdr(dev
, &ll_addr
, IFA_F_TENTATIVE
|
5102 IFA_F_OPTIMISTIC
)) {
5103 /* If we're not ready, then normal ifup will take care
5104 * of this. Otherwise, we need to request our rs here.
5106 ndisc_send_rs(dev
, &ll_addr
, &in6addr_linklocal_allrouters
);
5111 write_lock_bh(&idev
->lock
);
5114 idev
->if_flags
|= IF_RS_SENT
;
5115 idev
->rs_probes
= 1;
5116 addrconf_mod_rs_timer(idev
, idev
->cnf
.rtr_solicit_interval
);
5119 /* Well, that's kinda nasty ... */
5120 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
5121 spin_lock(&ifp
->lock
);
5122 if (ifp
->tokenized
) {
5124 ifp
->prefered_lft
= 0;
5126 spin_unlock(&ifp
->lock
);
5129 write_unlock_bh(&idev
->lock
);
5130 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
5131 addrconf_verify_rtnl();
5135 static const struct nla_policy inet6_af_policy
[IFLA_INET6_MAX
+ 1] = {
5136 [IFLA_INET6_ADDR_GEN_MODE
] = { .type
= NLA_U8
},
5137 [IFLA_INET6_TOKEN
] = { .len
= sizeof(struct in6_addr
) },
5140 static int inet6_validate_link_af(const struct net_device
*dev
,
5141 const struct nlattr
*nla
)
5143 struct nlattr
*tb
[IFLA_INET6_MAX
+ 1];
5145 if (dev
&& !__in6_dev_get(dev
))
5146 return -EAFNOSUPPORT
;
5148 return nla_parse_nested(tb
, IFLA_INET6_MAX
, nla
, inet6_af_policy
);
5151 static int inet6_set_link_af(struct net_device
*dev
, const struct nlattr
*nla
)
5154 struct inet6_dev
*idev
= __in6_dev_get(dev
);
5155 struct nlattr
*tb
[IFLA_INET6_MAX
+ 1];
5158 return -EAFNOSUPPORT
;
5160 if (nla_parse_nested(tb
, IFLA_INET6_MAX
, nla
, NULL
) < 0)
5163 if (tb
[IFLA_INET6_TOKEN
]) {
5164 err
= inet6_set_iftoken(idev
, nla_data(tb
[IFLA_INET6_TOKEN
]));
5169 if (tb
[IFLA_INET6_ADDR_GEN_MODE
]) {
5170 u8 mode
= nla_get_u8(tb
[IFLA_INET6_ADDR_GEN_MODE
]);
5172 if (mode
!= IN6_ADDR_GEN_MODE_EUI64
&&
5173 mode
!= IN6_ADDR_GEN_MODE_NONE
&&
5174 mode
!= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
&&
5175 mode
!= IN6_ADDR_GEN_MODE_RANDOM
)
5178 if (mode
== IN6_ADDR_GEN_MODE_STABLE_PRIVACY
&&
5179 !idev
->cnf
.stable_secret
.initialized
&&
5180 !dev_net(dev
)->ipv6
.devconf_dflt
->stable_secret
.initialized
)
5183 idev
->addr_gen_mode
= mode
;
5190 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
5191 u32 portid
, u32 seq
, int event
, unsigned int flags
)
5193 struct net_device
*dev
= idev
->dev
;
5194 struct ifinfomsg
*hdr
;
5195 struct nlmsghdr
*nlh
;
5198 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*hdr
), flags
);
5202 hdr
= nlmsg_data(nlh
);
5203 hdr
->ifi_family
= AF_INET6
;
5205 hdr
->ifi_type
= dev
->type
;
5206 hdr
->ifi_index
= dev
->ifindex
;
5207 hdr
->ifi_flags
= dev_get_flags(dev
);
5208 hdr
->ifi_change
= 0;
5210 if (nla_put_string(skb
, IFLA_IFNAME
, dev
->name
) ||
5212 nla_put(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
)) ||
5213 nla_put_u32(skb
, IFLA_MTU
, dev
->mtu
) ||
5214 (dev
->ifindex
!= dev_get_iflink(dev
) &&
5215 nla_put_u32(skb
, IFLA_LINK
, dev_get_iflink(dev
))) ||
5216 nla_put_u8(skb
, IFLA_OPERSTATE
,
5217 netif_running(dev
) ? dev
->operstate
: IF_OPER_DOWN
))
5218 goto nla_put_failure
;
5219 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
5221 goto nla_put_failure
;
5223 if (inet6_fill_ifla6_attrs(skb
, idev
, 0) < 0)
5224 goto nla_put_failure
;
5226 nla_nest_end(skb
, protoinfo
);
5227 nlmsg_end(skb
, nlh
);
5231 nlmsg_cancel(skb
, nlh
);
5235 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
5237 struct net
*net
= sock_net(skb
->sk
);
5240 struct net_device
*dev
;
5241 struct inet6_dev
*idev
;
5242 struct hlist_head
*head
;
5245 s_idx
= cb
->args
[1];
5248 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
5250 head
= &net
->dev_index_head
[h
];
5251 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
5254 idev
= __in6_dev_get(dev
);
5257 if (inet6_fill_ifinfo(skb
, idev
,
5258 NETLINK_CB(cb
->skb
).portid
,
5260 RTM_NEWLINK
, NLM_F_MULTI
) < 0)
5274 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
5276 struct sk_buff
*skb
;
5277 struct net
*net
= dev_net(idev
->dev
);
5280 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
5284 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
5286 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
5287 WARN_ON(err
== -EMSGSIZE
);
5291 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFINFO
, NULL
, GFP_ATOMIC
);
5295 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFINFO
, err
);
5298 static inline size_t inet6_prefix_nlmsg_size(void)
5300 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
5301 + nla_total_size(sizeof(struct in6_addr
))
5302 + nla_total_size(sizeof(struct prefix_cacheinfo
));
5305 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
5306 struct prefix_info
*pinfo
, u32 portid
, u32 seq
,
5307 int event
, unsigned int flags
)
5309 struct prefixmsg
*pmsg
;
5310 struct nlmsghdr
*nlh
;
5311 struct prefix_cacheinfo ci
;
5313 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*pmsg
), flags
);
5317 pmsg
= nlmsg_data(nlh
);
5318 pmsg
->prefix_family
= AF_INET6
;
5319 pmsg
->prefix_pad1
= 0;
5320 pmsg
->prefix_pad2
= 0;
5321 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
5322 pmsg
->prefix_len
= pinfo
->prefix_len
;
5323 pmsg
->prefix_type
= pinfo
->type
;
5324 pmsg
->prefix_pad3
= 0;
5325 pmsg
->prefix_flags
= 0;
5327 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
5328 if (pinfo
->autoconf
)
5329 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
5331 if (nla_put(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
))
5332 goto nla_put_failure
;
5333 ci
.preferred_time
= ntohl(pinfo
->prefered
);
5334 ci
.valid_time
= ntohl(pinfo
->valid
);
5335 if (nla_put(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
))
5336 goto nla_put_failure
;
5337 nlmsg_end(skb
, nlh
);
5341 nlmsg_cancel(skb
, nlh
);
5345 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
5346 struct prefix_info
*pinfo
)
5348 struct sk_buff
*skb
;
5349 struct net
*net
= dev_net(idev
->dev
);
5352 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
5356 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
5358 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
5359 WARN_ON(err
== -EMSGSIZE
);
5363 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
5367 rtnl_set_sk_err(net
, RTNLGRP_IPV6_PREFIX
, err
);
5370 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
5372 struct net
*net
= dev_net(ifp
->idev
->dev
);
5377 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
5382 * If the address was optimistic
5383 * we inserted the route at the start of
5384 * our DAD process, so we don't need
5387 if (!(ifp
->rt
->rt6i_node
))
5388 ip6_ins_rt(ifp
->rt
);
5389 if (ifp
->idev
->cnf
.forwarding
)
5390 addrconf_join_anycast(ifp
);
5391 if (!ipv6_addr_any(&ifp
->peer_addr
))
5392 addrconf_prefix_route(&ifp
->peer_addr
, 128,
5393 ifp
->idev
->dev
, 0, 0);
5396 if (ifp
->idev
->cnf
.forwarding
)
5397 addrconf_leave_anycast(ifp
);
5398 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
5399 if (!ipv6_addr_any(&ifp
->peer_addr
)) {
5400 struct rt6_info
*rt
;
5402 rt
= addrconf_get_prefix_route(&ifp
->peer_addr
, 128,
5403 ifp
->idev
->dev
, 0, 0);
5408 dst_hold(&ifp
->rt
->dst
);
5409 ip6_del_rt(ifp
->rt
);
5411 rt_genid_bump_ipv6(net
);
5414 atomic_inc(&net
->ipv6
.dev_addr_genid
);
5417 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
5420 if (likely(ifp
->idev
->dead
== 0))
5421 __ipv6_ifa_notify(event
, ifp
);
5422 rcu_read_unlock_bh();
5425 #ifdef CONFIG_SYSCTL
5428 int addrconf_sysctl_forward(struct ctl_table
*ctl
, int write
,
5429 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
5431 int *valp
= ctl
->data
;
5434 struct ctl_table lctl
;
5438 * ctl->data points to idev->cnf.forwarding, we should
5439 * not modify it until we get the rtnl lock.
5444 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
5447 ret
= addrconf_fixup_forwarding(ctl
, valp
, val
);
5454 int addrconf_sysctl_hop_limit(struct ctl_table
*ctl
, int write
,
5455 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
5457 struct ctl_table lctl
;
5458 int min_hl
= 1, max_hl
= 255;
5461 lctl
.extra1
= &min_hl
;
5462 lctl
.extra2
= &max_hl
;
5464 return proc_dointvec_minmax(&lctl
, write
, buffer
, lenp
, ppos
);
5468 int addrconf_sysctl_mtu(struct ctl_table
*ctl
, int write
,
5469 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
5471 struct inet6_dev
*idev
= ctl
->extra1
;
5472 int min_mtu
= IPV6_MIN_MTU
;
5473 struct ctl_table lctl
;
5476 lctl
.extra1
= &min_mtu
;
5477 lctl
.extra2
= idev
? &idev
->dev
->mtu
: NULL
;
5479 return proc_dointvec_minmax(&lctl
, write
, buffer
, lenp
, ppos
);
5482 static void dev_disable_change(struct inet6_dev
*idev
)
5484 struct netdev_notifier_info info
;
5486 if (!idev
|| !idev
->dev
)
5489 netdev_notifier_info_init(&info
, idev
->dev
);
5490 if (idev
->cnf
.disable_ipv6
)
5491 addrconf_notify(NULL
, NETDEV_DOWN
, &info
);
5493 addrconf_notify(NULL
, NETDEV_UP
, &info
);
5496 static void addrconf_disable_change(struct net
*net
, __s32 newf
)
5498 struct net_device
*dev
;
5499 struct inet6_dev
*idev
;
5502 for_each_netdev_rcu(net
, dev
) {
5503 idev
= __in6_dev_get(dev
);
5505 int changed
= (!idev
->cnf
.disable_ipv6
) ^ (!newf
);
5506 idev
->cnf
.disable_ipv6
= newf
;
5508 dev_disable_change(idev
);
5514 static int addrconf_disable_ipv6(struct ctl_table
*table
, int *p
, int newf
)
5519 if (!rtnl_trylock())
5520 return restart_syscall();
5522 net
= (struct net
*)table
->extra2
;
5526 if (p
== &net
->ipv6
.devconf_dflt
->disable_ipv6
) {
5531 if (p
== &net
->ipv6
.devconf_all
->disable_ipv6
) {
5532 net
->ipv6
.devconf_dflt
->disable_ipv6
= newf
;
5533 addrconf_disable_change(net
, newf
);
5534 } else if ((!newf
) ^ (!old
))
5535 dev_disable_change((struct inet6_dev
*)table
->extra1
);
5542 int addrconf_sysctl_disable(struct ctl_table
*ctl
, int write
,
5543 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
5545 int *valp
= ctl
->data
;
5548 struct ctl_table lctl
;
5552 * ctl->data points to idev->cnf.disable_ipv6, we should
5553 * not modify it until we get the rtnl lock.
5558 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
5561 ret
= addrconf_disable_ipv6(ctl
, valp
, val
);
5568 int addrconf_sysctl_proxy_ndp(struct ctl_table
*ctl
, int write
,
5569 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
5571 int *valp
= ctl
->data
;
5576 ret
= proc_dointvec(ctl
, write
, buffer
, lenp
, ppos
);
5579 if (write
&& old
!= new) {
5580 struct net
*net
= ctl
->extra2
;
5582 if (!rtnl_trylock())
5583 return restart_syscall();
5585 if (valp
== &net
->ipv6
.devconf_dflt
->proxy_ndp
)
5586 inet6_netconf_notify_devconf(net
, NETCONFA_PROXY_NEIGH
,
5587 NETCONFA_IFINDEX_DEFAULT
,
5588 net
->ipv6
.devconf_dflt
);
5589 else if (valp
== &net
->ipv6
.devconf_all
->proxy_ndp
)
5590 inet6_netconf_notify_devconf(net
, NETCONFA_PROXY_NEIGH
,
5591 NETCONFA_IFINDEX_ALL
,
5592 net
->ipv6
.devconf_all
);
5594 struct inet6_dev
*idev
= ctl
->extra1
;
5596 inet6_netconf_notify_devconf(net
, NETCONFA_PROXY_NEIGH
,
5606 static int addrconf_sysctl_stable_secret(struct ctl_table
*ctl
, int write
,
5607 void __user
*buffer
, size_t *lenp
,
5611 struct in6_addr addr
;
5612 char str
[IPV6_MAX_STRLEN
];
5613 struct ctl_table lctl
= *ctl
;
5614 struct net
*net
= ctl
->extra2
;
5615 struct ipv6_stable_secret
*secret
= ctl
->data
;
5617 if (&net
->ipv6
.devconf_all
->stable_secret
== ctl
->data
)
5620 lctl
.maxlen
= IPV6_MAX_STRLEN
;
5623 if (!rtnl_trylock())
5624 return restart_syscall();
5626 if (!write
&& !secret
->initialized
) {
5631 err
= snprintf(str
, sizeof(str
), "%pI6", &secret
->secret
);
5632 if (err
>= sizeof(str
)) {
5637 err
= proc_dostring(&lctl
, write
, buffer
, lenp
, ppos
);
5641 if (in6_pton(str
, -1, addr
.in6_u
.u6_addr8
, -1, NULL
) != 1) {
5646 secret
->initialized
= true;
5647 secret
->secret
= addr
;
5649 if (&net
->ipv6
.devconf_dflt
->stable_secret
== ctl
->data
) {
5650 struct net_device
*dev
;
5652 for_each_netdev(net
, dev
) {
5653 struct inet6_dev
*idev
= __in6_dev_get(dev
);
5656 idev
->addr_gen_mode
=
5657 IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
5661 struct inet6_dev
*idev
= ctl
->extra1
;
5663 idev
->addr_gen_mode
= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
5673 int addrconf_sysctl_ignore_routes_with_linkdown(struct ctl_table
*ctl
,
5675 void __user
*buffer
,
5679 int *valp
= ctl
->data
;
5682 struct ctl_table lctl
;
5685 /* ctl->data points to idev->cnf.ignore_routes_when_linkdown
5686 * we should not modify it until we get the rtnl lock.
5691 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
5694 ret
= addrconf_fixup_linkdown(ctl
, valp
, val
);
5700 static const struct ctl_table addrconf_sysctl
[] = {
5702 .procname
= "forwarding",
5703 .data
= &ipv6_devconf
.forwarding
,
5704 .maxlen
= sizeof(int),
5706 .proc_handler
= addrconf_sysctl_forward
,
5709 .procname
= "hop_limit",
5710 .data
= &ipv6_devconf
.hop_limit
,
5711 .maxlen
= sizeof(int),
5713 .proc_handler
= addrconf_sysctl_hop_limit
,
5717 .data
= &ipv6_devconf
.mtu6
,
5718 .maxlen
= sizeof(int),
5720 .proc_handler
= addrconf_sysctl_mtu
,
5723 .procname
= "accept_ra",
5724 .data
= &ipv6_devconf
.accept_ra
,
5725 .maxlen
= sizeof(int),
5727 .proc_handler
= proc_dointvec
,
5730 .procname
= "accept_redirects",
5731 .data
= &ipv6_devconf
.accept_redirects
,
5732 .maxlen
= sizeof(int),
5734 .proc_handler
= proc_dointvec
,
5737 .procname
= "autoconf",
5738 .data
= &ipv6_devconf
.autoconf
,
5739 .maxlen
= sizeof(int),
5741 .proc_handler
= proc_dointvec
,
5744 .procname
= "dad_transmits",
5745 .data
= &ipv6_devconf
.dad_transmits
,
5746 .maxlen
= sizeof(int),
5748 .proc_handler
= proc_dointvec
,
5751 .procname
= "router_solicitations",
5752 .data
= &ipv6_devconf
.rtr_solicits
,
5753 .maxlen
= sizeof(int),
5755 .proc_handler
= proc_dointvec
,
5758 .procname
= "router_solicitation_interval",
5759 .data
= &ipv6_devconf
.rtr_solicit_interval
,
5760 .maxlen
= sizeof(int),
5762 .proc_handler
= proc_dointvec_jiffies
,
5765 .procname
= "router_solicitation_delay",
5766 .data
= &ipv6_devconf
.rtr_solicit_delay
,
5767 .maxlen
= sizeof(int),
5769 .proc_handler
= proc_dointvec_jiffies
,
5772 .procname
= "force_mld_version",
5773 .data
= &ipv6_devconf
.force_mld_version
,
5774 .maxlen
= sizeof(int),
5776 .proc_handler
= proc_dointvec
,
5779 .procname
= "mldv1_unsolicited_report_interval",
5781 &ipv6_devconf
.mldv1_unsolicited_report_interval
,
5782 .maxlen
= sizeof(int),
5784 .proc_handler
= proc_dointvec_ms_jiffies
,
5787 .procname
= "mldv2_unsolicited_report_interval",
5789 &ipv6_devconf
.mldv2_unsolicited_report_interval
,
5790 .maxlen
= sizeof(int),
5792 .proc_handler
= proc_dointvec_ms_jiffies
,
5795 .procname
= "use_tempaddr",
5796 .data
= &ipv6_devconf
.use_tempaddr
,
5797 .maxlen
= sizeof(int),
5799 .proc_handler
= proc_dointvec
,
5802 .procname
= "temp_valid_lft",
5803 .data
= &ipv6_devconf
.temp_valid_lft
,
5804 .maxlen
= sizeof(int),
5806 .proc_handler
= proc_dointvec
,
5809 .procname
= "temp_prefered_lft",
5810 .data
= &ipv6_devconf
.temp_prefered_lft
,
5811 .maxlen
= sizeof(int),
5813 .proc_handler
= proc_dointvec
,
5816 .procname
= "regen_max_retry",
5817 .data
= &ipv6_devconf
.regen_max_retry
,
5818 .maxlen
= sizeof(int),
5820 .proc_handler
= proc_dointvec
,
5823 .procname
= "max_desync_factor",
5824 .data
= &ipv6_devconf
.max_desync_factor
,
5825 .maxlen
= sizeof(int),
5827 .proc_handler
= proc_dointvec
,
5830 .procname
= "max_addresses",
5831 .data
= &ipv6_devconf
.max_addresses
,
5832 .maxlen
= sizeof(int),
5834 .proc_handler
= proc_dointvec
,
5837 .procname
= "accept_ra_defrtr",
5838 .data
= &ipv6_devconf
.accept_ra_defrtr
,
5839 .maxlen
= sizeof(int),
5841 .proc_handler
= proc_dointvec
,
5844 .procname
= "accept_ra_min_hop_limit",
5845 .data
= &ipv6_devconf
.accept_ra_min_hop_limit
,
5846 .maxlen
= sizeof(int),
5848 .proc_handler
= proc_dointvec
,
5851 .procname
= "accept_ra_pinfo",
5852 .data
= &ipv6_devconf
.accept_ra_pinfo
,
5853 .maxlen
= sizeof(int),
5855 .proc_handler
= proc_dointvec
,
5857 #ifdef CONFIG_IPV6_ROUTER_PREF
5859 .procname
= "accept_ra_rtr_pref",
5860 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
5861 .maxlen
= sizeof(int),
5863 .proc_handler
= proc_dointvec
,
5866 .procname
= "router_probe_interval",
5867 .data
= &ipv6_devconf
.rtr_probe_interval
,
5868 .maxlen
= sizeof(int),
5870 .proc_handler
= proc_dointvec_jiffies
,
5872 #ifdef CONFIG_IPV6_ROUTE_INFO
5874 .procname
= "accept_ra_rt_info_max_plen",
5875 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
5876 .maxlen
= sizeof(int),
5878 .proc_handler
= proc_dointvec
,
5883 .procname
= "proxy_ndp",
5884 .data
= &ipv6_devconf
.proxy_ndp
,
5885 .maxlen
= sizeof(int),
5887 .proc_handler
= addrconf_sysctl_proxy_ndp
,
5890 .procname
= "accept_source_route",
5891 .data
= &ipv6_devconf
.accept_source_route
,
5892 .maxlen
= sizeof(int),
5894 .proc_handler
= proc_dointvec
,
5896 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
5898 .procname
= "optimistic_dad",
5899 .data
= &ipv6_devconf
.optimistic_dad
,
5900 .maxlen
= sizeof(int),
5902 .proc_handler
= proc_dointvec
,
5905 .procname
= "use_optimistic",
5906 .data
= &ipv6_devconf
.use_optimistic
,
5907 .maxlen
= sizeof(int),
5909 .proc_handler
= proc_dointvec
,
5912 #ifdef CONFIG_IPV6_MROUTE
5914 .procname
= "mc_forwarding",
5915 .data
= &ipv6_devconf
.mc_forwarding
,
5916 .maxlen
= sizeof(int),
5918 .proc_handler
= proc_dointvec
,
5922 .procname
= "disable_ipv6",
5923 .data
= &ipv6_devconf
.disable_ipv6
,
5924 .maxlen
= sizeof(int),
5926 .proc_handler
= addrconf_sysctl_disable
,
5929 .procname
= "accept_dad",
5930 .data
= &ipv6_devconf
.accept_dad
,
5931 .maxlen
= sizeof(int),
5933 .proc_handler
= proc_dointvec
,
5936 .procname
= "force_tllao",
5937 .data
= &ipv6_devconf
.force_tllao
,
5938 .maxlen
= sizeof(int),
5940 .proc_handler
= proc_dointvec
5943 .procname
= "ndisc_notify",
5944 .data
= &ipv6_devconf
.ndisc_notify
,
5945 .maxlen
= sizeof(int),
5947 .proc_handler
= proc_dointvec
5950 .procname
= "suppress_frag_ndisc",
5951 .data
= &ipv6_devconf
.suppress_frag_ndisc
,
5952 .maxlen
= sizeof(int),
5954 .proc_handler
= proc_dointvec
5957 .procname
= "accept_ra_from_local",
5958 .data
= &ipv6_devconf
.accept_ra_from_local
,
5959 .maxlen
= sizeof(int),
5961 .proc_handler
= proc_dointvec
,
5964 .procname
= "accept_ra_mtu",
5965 .data
= &ipv6_devconf
.accept_ra_mtu
,
5966 .maxlen
= sizeof(int),
5968 .proc_handler
= proc_dointvec
,
5971 .procname
= "stable_secret",
5972 .data
= &ipv6_devconf
.stable_secret
,
5973 .maxlen
= IPV6_MAX_STRLEN
,
5975 .proc_handler
= addrconf_sysctl_stable_secret
,
5978 .procname
= "use_oif_addrs_only",
5979 .data
= &ipv6_devconf
.use_oif_addrs_only
,
5980 .maxlen
= sizeof(int),
5982 .proc_handler
= proc_dointvec
,
5985 .procname
= "ignore_routes_with_linkdown",
5986 .data
= &ipv6_devconf
.ignore_routes_with_linkdown
,
5987 .maxlen
= sizeof(int),
5989 .proc_handler
= addrconf_sysctl_ignore_routes_with_linkdown
,
5992 .procname
= "drop_unicast_in_l2_multicast",
5993 .data
= &ipv6_devconf
.drop_unicast_in_l2_multicast
,
5994 .maxlen
= sizeof(int),
5996 .proc_handler
= proc_dointvec
,
5999 .procname
= "drop_unsolicited_na",
6000 .data
= &ipv6_devconf
.drop_unsolicited_na
,
6001 .maxlen
= sizeof(int),
6003 .proc_handler
= proc_dointvec
,
6006 .procname
= "keep_addr_on_down",
6007 .data
= &ipv6_devconf
.keep_addr_on_down
,
6008 .maxlen
= sizeof(int),
6010 .proc_handler
= proc_dointvec
,
6018 static int __addrconf_sysctl_register(struct net
*net
, char *dev_name
,
6019 struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
6022 struct ctl_table
*table
;
6023 char path
[sizeof("net/ipv6/conf/") + IFNAMSIZ
];
6025 table
= kmemdup(addrconf_sysctl
, sizeof(addrconf_sysctl
), GFP_KERNEL
);
6029 for (i
= 0; table
[i
].data
; i
++) {
6030 table
[i
].data
+= (char *)p
- (char *)&ipv6_devconf
;
6031 table
[i
].extra1
= idev
; /* embedded; no ref */
6032 table
[i
].extra2
= net
;
6035 snprintf(path
, sizeof(path
), "net/ipv6/conf/%s", dev_name
);
6037 p
->sysctl_header
= register_net_sysctl(net
, path
, table
);
6038 if (!p
->sysctl_header
)
6049 static void __addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
6051 struct ctl_table
*table
;
6053 if (!p
->sysctl_header
)
6056 table
= p
->sysctl_header
->ctl_table_arg
;
6057 unregister_net_sysctl_table(p
->sysctl_header
);
6058 p
->sysctl_header
= NULL
;
6062 static int addrconf_sysctl_register(struct inet6_dev
*idev
)
6066 if (!sysctl_dev_name_is_allowed(idev
->dev
->name
))
6069 err
= neigh_sysctl_register(idev
->dev
, idev
->nd_parms
,
6070 &ndisc_ifinfo_sysctl_change
);
6073 err
= __addrconf_sysctl_register(dev_net(idev
->dev
), idev
->dev
->name
,
6076 neigh_sysctl_unregister(idev
->nd_parms
);
6081 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
6083 __addrconf_sysctl_unregister(&idev
->cnf
);
6084 neigh_sysctl_unregister(idev
->nd_parms
);
6090 static int __net_init
addrconf_init_net(struct net
*net
)
6093 struct ipv6_devconf
*all
, *dflt
;
6095 all
= kmemdup(&ipv6_devconf
, sizeof(ipv6_devconf
), GFP_KERNEL
);
6099 dflt
= kmemdup(&ipv6_devconf_dflt
, sizeof(ipv6_devconf_dflt
), GFP_KERNEL
);
6101 goto err_alloc_dflt
;
6103 /* these will be inherited by all namespaces */
6104 dflt
->autoconf
= ipv6_defaults
.autoconf
;
6105 dflt
->disable_ipv6
= ipv6_defaults
.disable_ipv6
;
6107 dflt
->stable_secret
.initialized
= false;
6108 all
->stable_secret
.initialized
= false;
6110 net
->ipv6
.devconf_all
= all
;
6111 net
->ipv6
.devconf_dflt
= dflt
;
6113 #ifdef CONFIG_SYSCTL
6114 err
= __addrconf_sysctl_register(net
, "all", NULL
, all
);
6118 err
= __addrconf_sysctl_register(net
, "default", NULL
, dflt
);
6124 #ifdef CONFIG_SYSCTL
6126 __addrconf_sysctl_unregister(all
);
6136 static void __net_exit
addrconf_exit_net(struct net
*net
)
6138 #ifdef CONFIG_SYSCTL
6139 __addrconf_sysctl_unregister(net
->ipv6
.devconf_dflt
);
6140 __addrconf_sysctl_unregister(net
->ipv6
.devconf_all
);
6142 kfree(net
->ipv6
.devconf_dflt
);
6143 kfree(net
->ipv6
.devconf_all
);
6146 static struct pernet_operations addrconf_ops
= {
6147 .init
= addrconf_init_net
,
6148 .exit
= addrconf_exit_net
,
6151 static struct rtnl_af_ops inet6_ops __read_mostly
= {
6153 .fill_link_af
= inet6_fill_link_af
,
6154 .get_link_af_size
= inet6_get_link_af_size
,
6155 .validate_link_af
= inet6_validate_link_af
,
6156 .set_link_af
= inet6_set_link_af
,
6160 * Init / cleanup code
6163 int __init
addrconf_init(void)
6165 struct inet6_dev
*idev
;
6168 err
= ipv6_addr_label_init();
6170 pr_crit("%s: cannot initialize default policy table: %d\n",
6175 err
= register_pernet_subsys(&addrconf_ops
);
6179 addrconf_wq
= create_workqueue("ipv6_addrconf");
6185 /* The addrconf netdev notifier requires that loopback_dev
6186 * has it's ipv6 private information allocated and setup
6187 * before it can bring up and give link-local addresses
6188 * to other devices which are up.
6190 * Unfortunately, loopback_dev is not necessarily the first
6191 * entry in the global dev_base list of net devices. In fact,
6192 * it is likely to be the very last entry on that list.
6193 * So this causes the notifier registry below to try and
6194 * give link-local addresses to all devices besides loopback_dev
6195 * first, then loopback_dev, which cases all the non-loopback_dev
6196 * devices to fail to get a link-local address.
6198 * So, as a temporary fix, allocate the ipv6 structure for
6199 * loopback_dev first by hand.
6200 * Longer term, all of the dependencies ipv6 has upon the loopback
6201 * device and it being up should be removed.
6204 idev
= ipv6_add_dev(init_net
.loopback_dev
);
6207 err
= PTR_ERR(idev
);
6211 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
6212 INIT_HLIST_HEAD(&inet6_addr_lst
[i
]);
6214 register_netdevice_notifier(&ipv6_dev_notf
);
6218 rtnl_af_register(&inet6_ops
);
6220 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
,
6225 /* Only the first call to __rtnl_register can fail */
6226 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
, NULL
);
6227 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
, NULL
);
6228 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
,
6229 inet6_dump_ifaddr
, NULL
);
6230 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
,
6231 inet6_dump_ifmcaddr
, NULL
);
6232 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
,
6233 inet6_dump_ifacaddr
, NULL
);
6234 __rtnl_register(PF_INET6
, RTM_GETNETCONF
, inet6_netconf_get_devconf
,
6235 inet6_netconf_dump_devconf
, NULL
);
6237 ipv6_addr_label_rtnl_register();
6241 rtnl_af_unregister(&inet6_ops
);
6242 unregister_netdevice_notifier(&ipv6_dev_notf
);
6244 destroy_workqueue(addrconf_wq
);
6246 unregister_pernet_subsys(&addrconf_ops
);
6248 ipv6_addr_label_cleanup();
6253 void addrconf_cleanup(void)
6255 struct net_device
*dev
;
6258 unregister_netdevice_notifier(&ipv6_dev_notf
);
6259 unregister_pernet_subsys(&addrconf_ops
);
6260 ipv6_addr_label_cleanup();
6264 __rtnl_af_unregister(&inet6_ops
);
6266 /* clean dev list */
6267 for_each_netdev(&init_net
, dev
) {
6268 if (__in6_dev_get(dev
) == NULL
)
6270 addrconf_ifdown(dev
, 1);
6272 addrconf_ifdown(init_net
.loopback_dev
, 2);
6277 spin_lock_bh(&addrconf_hash_lock
);
6278 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
6279 WARN_ON(!hlist_empty(&inet6_addr_lst
[i
]));
6280 spin_unlock_bh(&addrconf_hash_lock
);
6281 cancel_delayed_work(&addr_chk_work
);
6284 destroy_workqueue(addrconf_wq
);