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/sched/signal.h>
47 #include <linux/socket.h>
48 #include <linux/sockios.h>
49 #include <linux/net.h>
50 #include <linux/inet.h>
51 #include <linux/in6.h>
52 #include <linux/netdevice.h>
53 #include <linux/if_addr.h>
54 #include <linux/if_arp.h>
55 #include <linux/if_arcnet.h>
56 #include <linux/if_infiniband.h>
57 #include <linux/route.h>
58 #include <linux/inetdevice.h>
59 #include <linux/init.h>
60 #include <linux/slab.h>
62 #include <linux/sysctl.h>
64 #include <linux/capability.h>
65 #include <linux/delay.h>
66 #include <linux/notifier.h>
67 #include <linux/string.h>
68 #include <linux/hash.h>
70 #include <net/net_namespace.h>
74 #include <net/6lowpan.h>
75 #include <net/firewire.h>
77 #include <net/protocol.h>
78 #include <net/ndisc.h>
79 #include <net/ip6_route.h>
80 #include <net/addrconf.h>
83 #include <net/netlink.h>
84 #include <net/pkt_sched.h>
85 #include <net/l3mdev.h>
86 #include <linux/if_tunnel.h>
87 #include <linux/rtnetlink.h>
88 #include <linux/netconf.h>
89 #include <linux/random.h>
90 #include <linux/uaccess.h>
91 #include <asm/unaligned.h>
93 #include <linux/proc_fs.h>
94 #include <linux/seq_file.h>
95 #include <linux/export.h>
97 #define INFINITY_LIFE_TIME 0xFFFFFFFF
99 #define IPV6_MAX_STRLEN \
100 sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255")
102 static inline u32
cstamp_delta(unsigned long cstamp
)
104 return (cstamp
- INITIAL_JIFFIES
) * 100UL / HZ
;
107 static inline s32
rfc3315_s14_backoff_init(s32 irt
)
109 /* multiply 'initial retransmission time' by 0.9 .. 1.1 */
110 u64 tmp
= (900000 + prandom_u32() % 200001) * (u64
)irt
;
111 do_div(tmp
, 1000000);
115 static inline s32
rfc3315_s14_backoff_update(s32 rt
, s32 mrt
)
117 /* multiply 'retransmission timeout' by 1.9 .. 2.1 */
118 u64 tmp
= (1900000 + prandom_u32() % 200001) * (u64
)rt
;
119 do_div(tmp
, 1000000);
120 if ((s32
)tmp
> mrt
) {
121 /* multiply 'maximum retransmission time' by 0.9 .. 1.1 */
122 tmp
= (900000 + prandom_u32() % 200001) * (u64
)mrt
;
123 do_div(tmp
, 1000000);
129 static int addrconf_sysctl_register(struct inet6_dev
*idev
);
130 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
);
132 static inline int addrconf_sysctl_register(struct inet6_dev
*idev
)
137 static inline void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
142 static void ipv6_regen_rndid(struct inet6_dev
*idev
);
143 static void ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
145 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
);
146 static int ipv6_count_addresses(const struct inet6_dev
*idev
);
147 static int ipv6_generate_stable_address(struct in6_addr
*addr
,
149 const struct inet6_dev
*idev
);
151 #define IN6_ADDR_HSIZE_SHIFT 8
152 #define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT)
154 * Configured unicast address hash table
156 static struct hlist_head inet6_addr_lst
[IN6_ADDR_HSIZE
];
157 static DEFINE_SPINLOCK(addrconf_hash_lock
);
159 static void addrconf_verify(void);
160 static void addrconf_verify_rtnl(void);
161 static void addrconf_verify_work(struct work_struct
*);
163 static struct workqueue_struct
*addrconf_wq
;
164 static DECLARE_DELAYED_WORK(addr_chk_work
, addrconf_verify_work
);
166 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
167 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
169 static void addrconf_type_change(struct net_device
*dev
,
170 unsigned long event
);
171 static int addrconf_ifdown(struct net_device
*dev
, int how
);
173 static struct fib6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
175 const struct net_device
*dev
,
176 u32 flags
, u32 noflags
,
179 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
);
180 static void addrconf_dad_work(struct work_struct
*w
);
181 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
, bool bump_id
,
183 static void addrconf_dad_run(struct inet6_dev
*idev
, bool restart
);
184 static void addrconf_rs_timer(struct timer_list
*t
);
185 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
186 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
188 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
189 struct prefix_info
*pinfo
);
191 static struct ipv6_devconf ipv6_devconf __read_mostly
= {
193 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
194 .mtu6
= IPV6_MIN_MTU
,
196 .accept_redirects
= 1,
198 .force_mld_version
= 0,
199 .mldv1_unsolicited_report_interval
= 10 * HZ
,
200 .mldv2_unsolicited_report_interval
= HZ
,
202 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
203 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
204 .rtr_solicit_max_interval
= RTR_SOLICITATION_MAX_INTERVAL
,
205 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
207 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
208 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
209 .regen_max_retry
= REGEN_MAX_RETRY
,
210 .max_desync_factor
= MAX_DESYNC_FACTOR
,
211 .max_addresses
= IPV6_MAX_ADDRESSES
,
212 .accept_ra_defrtr
= 1,
213 .accept_ra_from_local
= 0,
214 .accept_ra_min_hop_limit
= 1,
215 .accept_ra_pinfo
= 1,
216 #ifdef CONFIG_IPV6_ROUTER_PREF
217 .accept_ra_rtr_pref
= 1,
218 .rtr_probe_interval
= 60 * HZ
,
219 #ifdef CONFIG_IPV6_ROUTE_INFO
220 .accept_ra_rt_info_min_plen
= 0,
221 .accept_ra_rt_info_max_plen
= 0,
225 .accept_source_route
= 0, /* we do not accept RH0 by default. */
228 .suppress_frag_ndisc
= 1,
231 .initialized
= false,
233 .use_oif_addrs_only
= 0,
234 .ignore_routes_with_linkdown
= 0,
235 .keep_addr_on_down
= 0,
237 #ifdef CONFIG_IPV6_SEG6_HMAC
238 .seg6_require_hmac
= 0,
241 .addr_gen_mode
= IN6_ADDR_GEN_MODE_EUI64
,
245 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly
= {
247 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
248 .mtu6
= IPV6_MIN_MTU
,
250 .accept_redirects
= 1,
252 .force_mld_version
= 0,
253 .mldv1_unsolicited_report_interval
= 10 * HZ
,
254 .mldv2_unsolicited_report_interval
= HZ
,
256 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
257 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
258 .rtr_solicit_max_interval
= RTR_SOLICITATION_MAX_INTERVAL
,
259 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
261 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
262 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
263 .regen_max_retry
= REGEN_MAX_RETRY
,
264 .max_desync_factor
= MAX_DESYNC_FACTOR
,
265 .max_addresses
= IPV6_MAX_ADDRESSES
,
266 .accept_ra_defrtr
= 1,
267 .accept_ra_from_local
= 0,
268 .accept_ra_min_hop_limit
= 1,
269 .accept_ra_pinfo
= 1,
270 #ifdef CONFIG_IPV6_ROUTER_PREF
271 .accept_ra_rtr_pref
= 1,
272 .rtr_probe_interval
= 60 * HZ
,
273 #ifdef CONFIG_IPV6_ROUTE_INFO
274 .accept_ra_rt_info_min_plen
= 0,
275 .accept_ra_rt_info_max_plen
= 0,
279 .accept_source_route
= 0, /* we do not accept RH0 by default. */
282 .suppress_frag_ndisc
= 1,
285 .initialized
= false,
287 .use_oif_addrs_only
= 0,
288 .ignore_routes_with_linkdown
= 0,
289 .keep_addr_on_down
= 0,
291 #ifdef CONFIG_IPV6_SEG6_HMAC
292 .seg6_require_hmac
= 0,
295 .addr_gen_mode
= IN6_ADDR_GEN_MODE_EUI64
,
299 /* Check if link is ready: is it up and is a valid qdisc available */
300 static inline bool addrconf_link_ready(const struct net_device
*dev
)
302 return netif_oper_up(dev
) && !qdisc_tx_is_noop(dev
);
305 static void addrconf_del_rs_timer(struct inet6_dev
*idev
)
307 if (del_timer(&idev
->rs_timer
))
311 static void addrconf_del_dad_work(struct inet6_ifaddr
*ifp
)
313 if (cancel_delayed_work(&ifp
->dad_work
))
317 static void addrconf_mod_rs_timer(struct inet6_dev
*idev
,
320 if (!timer_pending(&idev
->rs_timer
))
322 mod_timer(&idev
->rs_timer
, jiffies
+ when
);
325 static void addrconf_mod_dad_work(struct inet6_ifaddr
*ifp
,
329 if (mod_delayed_work(addrconf_wq
, &ifp
->dad_work
, delay
))
333 static int snmp6_alloc_dev(struct inet6_dev
*idev
)
337 idev
->stats
.ipv6
= alloc_percpu(struct ipstats_mib
);
338 if (!idev
->stats
.ipv6
)
341 for_each_possible_cpu(i
) {
342 struct ipstats_mib
*addrconf_stats
;
343 addrconf_stats
= per_cpu_ptr(idev
->stats
.ipv6
, i
);
344 u64_stats_init(&addrconf_stats
->syncp
);
348 idev
->stats
.icmpv6dev
= kzalloc(sizeof(struct icmpv6_mib_device
),
350 if (!idev
->stats
.icmpv6dev
)
352 idev
->stats
.icmpv6msgdev
= kzalloc(sizeof(struct icmpv6msg_mib_device
),
354 if (!idev
->stats
.icmpv6msgdev
)
360 kfree(idev
->stats
.icmpv6dev
);
362 free_percpu(idev
->stats
.ipv6
);
367 static struct inet6_dev
*ipv6_add_dev(struct net_device
*dev
)
369 struct inet6_dev
*ndev
;
374 if (dev
->mtu
< IPV6_MIN_MTU
)
375 return ERR_PTR(-EINVAL
);
377 ndev
= kzalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
381 rwlock_init(&ndev
->lock
);
383 INIT_LIST_HEAD(&ndev
->addr_list
);
384 timer_setup(&ndev
->rs_timer
, addrconf_rs_timer
, 0);
385 memcpy(&ndev
->cnf
, dev_net(dev
)->ipv6
.devconf_dflt
, sizeof(ndev
->cnf
));
387 if (ndev
->cnf
.stable_secret
.initialized
)
388 ndev
->cnf
.addr_gen_mode
= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
390 ndev
->cnf
.mtu6
= dev
->mtu
;
391 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
392 if (!ndev
->nd_parms
) {
396 if (ndev
->cnf
.forwarding
)
397 dev_disable_lro(dev
);
398 /* We refer to the device */
401 if (snmp6_alloc_dev(ndev
) < 0) {
402 netdev_dbg(dev
, "%s: cannot allocate memory for statistics\n",
404 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
410 if (snmp6_register_dev(ndev
) < 0) {
411 netdev_dbg(dev
, "%s: cannot create /proc/net/dev_snmp6/%s\n",
412 __func__
, dev
->name
);
416 /* One reference from device. */
417 refcount_set(&ndev
->refcnt
, 1);
419 if (dev
->flags
& (IFF_NOARP
| IFF_LOOPBACK
))
420 ndev
->cnf
.accept_dad
= -1;
422 #if IS_ENABLED(CONFIG_IPV6_SIT)
423 if (dev
->type
== ARPHRD_SIT
&& (dev
->priv_flags
& IFF_ISATAP
)) {
424 pr_info("%s: Disabled Multicast RS\n", dev
->name
);
425 ndev
->cnf
.rtr_solicits
= 0;
429 INIT_LIST_HEAD(&ndev
->tempaddr_list
);
430 ndev
->desync_factor
= U32_MAX
;
431 if ((dev
->flags
&IFF_LOOPBACK
) ||
432 dev
->type
== ARPHRD_TUNNEL
||
433 dev
->type
== ARPHRD_TUNNEL6
||
434 dev
->type
== ARPHRD_SIT
||
435 dev
->type
== ARPHRD_NONE
) {
436 ndev
->cnf
.use_tempaddr
= -1;
438 ipv6_regen_rndid(ndev
);
440 ndev
->token
= in6addr_any
;
442 if (netif_running(dev
) && addrconf_link_ready(dev
))
443 ndev
->if_flags
|= IF_READY
;
445 ipv6_mc_init_dev(ndev
);
446 ndev
->tstamp
= jiffies
;
447 err
= addrconf_sysctl_register(ndev
);
449 ipv6_mc_destroy_dev(ndev
);
450 snmp6_unregister_dev(ndev
);
453 /* protected by rtnl_lock */
454 rcu_assign_pointer(dev
->ip6_ptr
, ndev
);
456 /* Join interface-local all-node multicast group */
457 ipv6_dev_mc_inc(dev
, &in6addr_interfacelocal_allnodes
);
459 /* Join all-node multicast group */
460 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allnodes
);
462 /* Join all-router multicast group if forwarding is set */
463 if (ndev
->cnf
.forwarding
&& (dev
->flags
& IFF_MULTICAST
))
464 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
469 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
471 in6_dev_finish_destroy(ndev
);
475 static struct inet6_dev
*ipv6_find_idev(struct net_device
*dev
)
477 struct inet6_dev
*idev
;
481 idev
= __in6_dev_get(dev
);
483 idev
= ipv6_add_dev(dev
);
488 if (dev
->flags
&IFF_UP
)
493 static int inet6_netconf_msgsize_devconf(int type
)
495 int size
= NLMSG_ALIGN(sizeof(struct netconfmsg
))
496 + nla_total_size(4); /* NETCONFA_IFINDEX */
499 if (type
== NETCONFA_ALL
)
502 if (all
|| type
== NETCONFA_FORWARDING
)
503 size
+= nla_total_size(4);
504 #ifdef CONFIG_IPV6_MROUTE
505 if (all
|| type
== NETCONFA_MC_FORWARDING
)
506 size
+= nla_total_size(4);
508 if (all
|| type
== NETCONFA_PROXY_NEIGH
)
509 size
+= nla_total_size(4);
511 if (all
|| type
== NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
)
512 size
+= nla_total_size(4);
517 static int inet6_netconf_fill_devconf(struct sk_buff
*skb
, int ifindex
,
518 struct ipv6_devconf
*devconf
, u32 portid
,
519 u32 seq
, int event
, unsigned int flags
,
522 struct nlmsghdr
*nlh
;
523 struct netconfmsg
*ncm
;
526 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct netconfmsg
),
531 if (type
== NETCONFA_ALL
)
534 ncm
= nlmsg_data(nlh
);
535 ncm
->ncm_family
= AF_INET6
;
537 if (nla_put_s32(skb
, NETCONFA_IFINDEX
, ifindex
) < 0)
538 goto nla_put_failure
;
543 if ((all
|| type
== NETCONFA_FORWARDING
) &&
544 nla_put_s32(skb
, NETCONFA_FORWARDING
, devconf
->forwarding
) < 0)
545 goto nla_put_failure
;
546 #ifdef CONFIG_IPV6_MROUTE
547 if ((all
|| type
== NETCONFA_MC_FORWARDING
) &&
548 nla_put_s32(skb
, NETCONFA_MC_FORWARDING
,
549 devconf
->mc_forwarding
) < 0)
550 goto nla_put_failure
;
552 if ((all
|| type
== NETCONFA_PROXY_NEIGH
) &&
553 nla_put_s32(skb
, NETCONFA_PROXY_NEIGH
, devconf
->proxy_ndp
) < 0)
554 goto nla_put_failure
;
556 if ((all
|| type
== NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
) &&
557 nla_put_s32(skb
, NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
,
558 devconf
->ignore_routes_with_linkdown
) < 0)
559 goto nla_put_failure
;
566 nlmsg_cancel(skb
, nlh
);
570 void inet6_netconf_notify_devconf(struct net
*net
, int event
, int type
,
571 int ifindex
, struct ipv6_devconf
*devconf
)
576 skb
= nlmsg_new(inet6_netconf_msgsize_devconf(type
), GFP_KERNEL
);
580 err
= inet6_netconf_fill_devconf(skb
, ifindex
, devconf
, 0, 0,
583 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
584 WARN_ON(err
== -EMSGSIZE
);
588 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_NETCONF
, NULL
, GFP_KERNEL
);
591 rtnl_set_sk_err(net
, RTNLGRP_IPV6_NETCONF
, err
);
594 static const struct nla_policy devconf_ipv6_policy
[NETCONFA_MAX
+1] = {
595 [NETCONFA_IFINDEX
] = { .len
= sizeof(int) },
596 [NETCONFA_FORWARDING
] = { .len
= sizeof(int) },
597 [NETCONFA_PROXY_NEIGH
] = { .len
= sizeof(int) },
598 [NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
] = { .len
= sizeof(int) },
601 static int inet6_netconf_valid_get_req(struct sk_buff
*skb
,
602 const struct nlmsghdr
*nlh
,
604 struct netlink_ext_ack
*extack
)
608 if (nlh
->nlmsg_len
< nlmsg_msg_size(sizeof(struct netconfmsg
))) {
609 NL_SET_ERR_MSG_MOD(extack
, "Invalid header for netconf get request");
613 if (!netlink_strict_get_check(skb
))
614 return nlmsg_parse_deprecated(nlh
, sizeof(struct netconfmsg
),
616 devconf_ipv6_policy
, extack
);
618 err
= nlmsg_parse_deprecated_strict(nlh
, sizeof(struct netconfmsg
),
620 devconf_ipv6_policy
, extack
);
624 for (i
= 0; i
<= NETCONFA_MAX
; i
++) {
629 case NETCONFA_IFINDEX
:
632 NL_SET_ERR_MSG_MOD(extack
, "Unsupported attribute in netconf get request");
640 static int inet6_netconf_get_devconf(struct sk_buff
*in_skb
,
641 struct nlmsghdr
*nlh
,
642 struct netlink_ext_ack
*extack
)
644 struct net
*net
= sock_net(in_skb
->sk
);
645 struct nlattr
*tb
[NETCONFA_MAX
+1];
646 struct inet6_dev
*in6_dev
= NULL
;
647 struct net_device
*dev
= NULL
;
649 struct ipv6_devconf
*devconf
;
653 err
= inet6_netconf_valid_get_req(in_skb
, nlh
, tb
, extack
);
657 if (!tb
[NETCONFA_IFINDEX
])
661 ifindex
= nla_get_s32(tb
[NETCONFA_IFINDEX
]);
663 case NETCONFA_IFINDEX_ALL
:
664 devconf
= net
->ipv6
.devconf_all
;
666 case NETCONFA_IFINDEX_DEFAULT
:
667 devconf
= net
->ipv6
.devconf_dflt
;
670 dev
= dev_get_by_index(net
, ifindex
);
673 in6_dev
= in6_dev_get(dev
);
676 devconf
= &in6_dev
->cnf
;
681 skb
= nlmsg_new(inet6_netconf_msgsize_devconf(NETCONFA_ALL
), GFP_KERNEL
);
685 err
= inet6_netconf_fill_devconf(skb
, ifindex
, devconf
,
686 NETLINK_CB(in_skb
).portid
,
687 nlh
->nlmsg_seq
, RTM_NEWNETCONF
, 0,
690 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
691 WARN_ON(err
== -EMSGSIZE
);
695 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).portid
);
698 in6_dev_put(in6_dev
);
704 static int inet6_netconf_dump_devconf(struct sk_buff
*skb
,
705 struct netlink_callback
*cb
)
707 const struct nlmsghdr
*nlh
= cb
->nlh
;
708 struct net
*net
= sock_net(skb
->sk
);
711 struct net_device
*dev
;
712 struct inet6_dev
*idev
;
713 struct hlist_head
*head
;
715 if (cb
->strict_check
) {
716 struct netlink_ext_ack
*extack
= cb
->extack
;
717 struct netconfmsg
*ncm
;
719 if (nlh
->nlmsg_len
< nlmsg_msg_size(sizeof(*ncm
))) {
720 NL_SET_ERR_MSG_MOD(extack
, "Invalid header for netconf dump request");
724 if (nlmsg_attrlen(nlh
, sizeof(*ncm
))) {
725 NL_SET_ERR_MSG_MOD(extack
, "Invalid data after header in netconf dump request");
731 s_idx
= idx
= cb
->args
[1];
733 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
735 head
= &net
->dev_index_head
[h
];
737 cb
->seq
= atomic_read(&net
->ipv6
.dev_addr_genid
) ^
739 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
742 idev
= __in6_dev_get(dev
);
746 if (inet6_netconf_fill_devconf(skb
, dev
->ifindex
,
748 NETLINK_CB(cb
->skb
).portid
,
756 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
762 if (h
== NETDEV_HASHENTRIES
) {
763 if (inet6_netconf_fill_devconf(skb
, NETCONFA_IFINDEX_ALL
,
764 net
->ipv6
.devconf_all
,
765 NETLINK_CB(cb
->skb
).portid
,
767 RTM_NEWNETCONF
, NLM_F_MULTI
,
773 if (h
== NETDEV_HASHENTRIES
+ 1) {
774 if (inet6_netconf_fill_devconf(skb
, NETCONFA_IFINDEX_DEFAULT
,
775 net
->ipv6
.devconf_dflt
,
776 NETLINK_CB(cb
->skb
).portid
,
778 RTM_NEWNETCONF
, NLM_F_MULTI
,
792 static void dev_forward_change(struct inet6_dev
*idev
)
794 struct net_device
*dev
;
795 struct inet6_ifaddr
*ifa
;
800 if (idev
->cnf
.forwarding
)
801 dev_disable_lro(dev
);
802 if (dev
->flags
& IFF_MULTICAST
) {
803 if (idev
->cnf
.forwarding
) {
804 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
805 ipv6_dev_mc_inc(dev
, &in6addr_interfacelocal_allrouters
);
806 ipv6_dev_mc_inc(dev
, &in6addr_sitelocal_allrouters
);
808 ipv6_dev_mc_dec(dev
, &in6addr_linklocal_allrouters
);
809 ipv6_dev_mc_dec(dev
, &in6addr_interfacelocal_allrouters
);
810 ipv6_dev_mc_dec(dev
, &in6addr_sitelocal_allrouters
);
814 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
815 if (ifa
->flags
&IFA_F_TENTATIVE
)
817 if (idev
->cnf
.forwarding
)
818 addrconf_join_anycast(ifa
);
820 addrconf_leave_anycast(ifa
);
822 inet6_netconf_notify_devconf(dev_net(dev
), RTM_NEWNETCONF
,
824 dev
->ifindex
, &idev
->cnf
);
828 static void addrconf_forward_change(struct net
*net
, __s32 newf
)
830 struct net_device
*dev
;
831 struct inet6_dev
*idev
;
833 for_each_netdev(net
, dev
) {
834 idev
= __in6_dev_get(dev
);
836 int changed
= (!idev
->cnf
.forwarding
) ^ (!newf
);
837 idev
->cnf
.forwarding
= newf
;
839 dev_forward_change(idev
);
844 static int addrconf_fixup_forwarding(struct ctl_table
*table
, int *p
, int newf
)
850 return restart_syscall();
852 net
= (struct net
*)table
->extra2
;
856 if (p
== &net
->ipv6
.devconf_dflt
->forwarding
) {
857 if ((!newf
) ^ (!old
))
858 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
860 NETCONFA_IFINDEX_DEFAULT
,
861 net
->ipv6
.devconf_dflt
);
866 if (p
== &net
->ipv6
.devconf_all
->forwarding
) {
867 int old_dflt
= net
->ipv6
.devconf_dflt
->forwarding
;
869 net
->ipv6
.devconf_dflt
->forwarding
= newf
;
870 if ((!newf
) ^ (!old_dflt
))
871 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
873 NETCONFA_IFINDEX_DEFAULT
,
874 net
->ipv6
.devconf_dflt
);
876 addrconf_forward_change(net
, newf
);
877 if ((!newf
) ^ (!old
))
878 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
880 NETCONFA_IFINDEX_ALL
,
881 net
->ipv6
.devconf_all
);
882 } else if ((!newf
) ^ (!old
))
883 dev_forward_change((struct inet6_dev
*)table
->extra1
);
887 rt6_purge_dflt_routers(net
);
891 static void addrconf_linkdown_change(struct net
*net
, __s32 newf
)
893 struct net_device
*dev
;
894 struct inet6_dev
*idev
;
896 for_each_netdev(net
, dev
) {
897 idev
= __in6_dev_get(dev
);
899 int changed
= (!idev
->cnf
.ignore_routes_with_linkdown
) ^ (!newf
);
901 idev
->cnf
.ignore_routes_with_linkdown
= newf
;
903 inet6_netconf_notify_devconf(dev_net(dev
),
905 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
,
912 static int addrconf_fixup_linkdown(struct ctl_table
*table
, int *p
, int newf
)
918 return restart_syscall();
920 net
= (struct net
*)table
->extra2
;
924 if (p
== &net
->ipv6
.devconf_dflt
->ignore_routes_with_linkdown
) {
925 if ((!newf
) ^ (!old
))
926 inet6_netconf_notify_devconf(net
,
928 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
,
929 NETCONFA_IFINDEX_DEFAULT
,
930 net
->ipv6
.devconf_dflt
);
935 if (p
== &net
->ipv6
.devconf_all
->ignore_routes_with_linkdown
) {
936 net
->ipv6
.devconf_dflt
->ignore_routes_with_linkdown
= newf
;
937 addrconf_linkdown_change(net
, newf
);
938 if ((!newf
) ^ (!old
))
939 inet6_netconf_notify_devconf(net
,
941 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
,
942 NETCONFA_IFINDEX_ALL
,
943 net
->ipv6
.devconf_all
);
952 /* Nobody refers to this ifaddr, destroy it */
953 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
955 WARN_ON(!hlist_unhashed(&ifp
->addr_lst
));
957 #ifdef NET_REFCNT_DEBUG
958 pr_debug("%s\n", __func__
);
961 in6_dev_put(ifp
->idev
);
963 if (cancel_delayed_work(&ifp
->dad_work
))
964 pr_notice("delayed DAD work was pending while freeing ifa=%p\n",
967 if (ifp
->state
!= INET6_IFADDR_STATE_DEAD
) {
968 pr_warn("Freeing alive inet6 address %p\n", ifp
);
976 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
979 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
982 * Each device address list is sorted in order of scope -
983 * global before linklocal.
985 list_for_each(p
, &idev
->addr_list
) {
986 struct inet6_ifaddr
*ifa
987 = list_entry(p
, struct inet6_ifaddr
, if_list
);
988 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
992 list_add_tail_rcu(&ifp
->if_list
, p
);
995 static u32
inet6_addr_hash(const struct net
*net
, const struct in6_addr
*addr
)
997 u32 val
= ipv6_addr_hash(addr
) ^ net_hash_mix(net
);
999 return hash_32(val
, IN6_ADDR_HSIZE_SHIFT
);
1002 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
1003 struct net_device
*dev
, unsigned int hash
)
1005 struct inet6_ifaddr
*ifp
;
1007 hlist_for_each_entry(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1008 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1010 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1011 if (!dev
|| ifp
->idev
->dev
== dev
)
1018 static int ipv6_add_addr_hash(struct net_device
*dev
, struct inet6_ifaddr
*ifa
)
1020 unsigned int hash
= inet6_addr_hash(dev_net(dev
), &ifa
->addr
);
1023 spin_lock(&addrconf_hash_lock
);
1025 /* Ignore adding duplicate addresses on an interface */
1026 if (ipv6_chk_same_addr(dev_net(dev
), &ifa
->addr
, dev
, hash
)) {
1027 netdev_dbg(dev
, "ipv6_add_addr: already assigned\n");
1030 hlist_add_head_rcu(&ifa
->addr_lst
, &inet6_addr_lst
[hash
]);
1033 spin_unlock(&addrconf_hash_lock
);
1038 /* On success it returns ifp with increased reference count */
1040 static struct inet6_ifaddr
*
1041 ipv6_add_addr(struct inet6_dev
*idev
, struct ifa6_config
*cfg
,
1042 bool can_block
, struct netlink_ext_ack
*extack
)
1044 gfp_t gfp_flags
= can_block
? GFP_KERNEL
: GFP_ATOMIC
;
1045 int addr_type
= ipv6_addr_type(cfg
->pfx
);
1046 struct net
*net
= dev_net(idev
->dev
);
1047 struct inet6_ifaddr
*ifa
= NULL
;
1048 struct fib6_info
*f6i
= NULL
;
1051 if (addr_type
== IPV6_ADDR_ANY
||
1052 addr_type
& IPV6_ADDR_MULTICAST
||
1053 (!(idev
->dev
->flags
& IFF_LOOPBACK
) &&
1054 !netif_is_l3_master(idev
->dev
) &&
1055 addr_type
& IPV6_ADDR_LOOPBACK
))
1056 return ERR_PTR(-EADDRNOTAVAIL
);
1059 err
= -ENODEV
; /*XXX*/
1063 if (idev
->cnf
.disable_ipv6
) {
1068 /* validator notifier needs to be blocking;
1069 * do not call in atomic context
1072 struct in6_validator_info i6vi
= {
1073 .i6vi_addr
= *cfg
->pfx
,
1078 err
= inet6addr_validator_notifier_call_chain(NETDEV_UP
, &i6vi
);
1079 err
= notifier_to_errno(err
);
1084 ifa
= kzalloc(sizeof(*ifa
), gfp_flags
);
1090 f6i
= addrconf_f6i_alloc(net
, idev
, cfg
->pfx
, false, gfp_flags
);
1097 if (net
->ipv6
.devconf_all
->disable_policy
||
1098 idev
->cnf
.disable_policy
)
1099 f6i
->dst_nopolicy
= true;
1101 neigh_parms_data_state_setall(idev
->nd_parms
);
1103 ifa
->addr
= *cfg
->pfx
;
1105 ifa
->peer_addr
= *cfg
->peer_pfx
;
1107 spin_lock_init(&ifa
->lock
);
1108 INIT_DELAYED_WORK(&ifa
->dad_work
, addrconf_dad_work
);
1109 INIT_HLIST_NODE(&ifa
->addr_lst
);
1110 ifa
->scope
= cfg
->scope
;
1111 ifa
->prefix_len
= cfg
->plen
;
1112 ifa
->rt_priority
= cfg
->rt_priority
;
1113 ifa
->flags
= cfg
->ifa_flags
;
1114 /* No need to add the TENTATIVE flag for addresses with NODAD */
1115 if (!(cfg
->ifa_flags
& IFA_F_NODAD
))
1116 ifa
->flags
|= IFA_F_TENTATIVE
;
1117 ifa
->valid_lft
= cfg
->valid_lft
;
1118 ifa
->prefered_lft
= cfg
->preferred_lft
;
1119 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
1120 ifa
->tokenized
= false;
1128 refcount_set(&ifa
->refcnt
, 1);
1132 err
= ipv6_add_addr_hash(idev
->dev
, ifa
);
1134 rcu_read_unlock_bh();
1138 write_lock(&idev
->lock
);
1140 /* Add to inet6_dev unicast addr list. */
1141 ipv6_link_dev_addr(idev
, ifa
);
1143 if (ifa
->flags
&IFA_F_TEMPORARY
) {
1144 list_add(&ifa
->tmp_list
, &idev
->tempaddr_list
);
1149 write_unlock(&idev
->lock
);
1151 rcu_read_unlock_bh();
1153 inet6addr_notifier_call_chain(NETDEV_UP
, ifa
);
1155 if (unlikely(err
< 0)) {
1156 fib6_info_release(f6i
);
1160 in6_dev_put(ifa
->idev
);
1169 enum cleanup_prefix_rt_t
{
1170 CLEANUP_PREFIX_RT_NOP
, /* no cleanup action for prefix route */
1171 CLEANUP_PREFIX_RT_DEL
, /* delete the prefix route */
1172 CLEANUP_PREFIX_RT_EXPIRE
, /* update the lifetime of the prefix route */
1176 * Check, whether the prefix for ifp would still need a prefix route
1177 * after deleting ifp. The function returns one of the CLEANUP_PREFIX_RT_*
1180 * 1) we don't purge prefix if address was not permanent.
1181 * prefix is managed by its own lifetime.
1182 * 2) we also don't purge, if the address was IFA_F_NOPREFIXROUTE.
1183 * 3) if there are no addresses, delete prefix.
1184 * 4) if there are still other permanent address(es),
1185 * corresponding prefix is still permanent.
1186 * 5) if there are still other addresses with IFA_F_NOPREFIXROUTE,
1187 * don't purge the prefix, assume user space is managing it.
1188 * 6) otherwise, update prefix lifetime to the
1189 * longest valid lifetime among the corresponding
1190 * addresses on the device.
1191 * Note: subsequent RA will update lifetime.
1193 static enum cleanup_prefix_rt_t
1194 check_cleanup_prefix_route(struct inet6_ifaddr
*ifp
, unsigned long *expires
)
1196 struct inet6_ifaddr
*ifa
;
1197 struct inet6_dev
*idev
= ifp
->idev
;
1198 unsigned long lifetime
;
1199 enum cleanup_prefix_rt_t action
= CLEANUP_PREFIX_RT_DEL
;
1203 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
1206 if (ifa
->prefix_len
!= ifp
->prefix_len
||
1207 !ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
1210 if (ifa
->flags
& (IFA_F_PERMANENT
| IFA_F_NOPREFIXROUTE
))
1211 return CLEANUP_PREFIX_RT_NOP
;
1213 action
= CLEANUP_PREFIX_RT_EXPIRE
;
1215 spin_lock(&ifa
->lock
);
1217 lifetime
= addrconf_timeout_fixup(ifa
->valid_lft
, HZ
);
1219 * Note: Because this address is
1220 * not permanent, lifetime <
1221 * LONG_MAX / HZ here.
1223 if (time_before(*expires
, ifa
->tstamp
+ lifetime
* HZ
))
1224 *expires
= ifa
->tstamp
+ lifetime
* HZ
;
1225 spin_unlock(&ifa
->lock
);
1232 cleanup_prefix_route(struct inet6_ifaddr
*ifp
, unsigned long expires
, bool del_rt
)
1234 struct fib6_info
*f6i
;
1236 f6i
= addrconf_get_prefix_route(&ifp
->addr
, ifp
->prefix_len
,
1237 ifp
->idev
->dev
, 0, RTF_DEFAULT
, true);
1240 ip6_del_rt(dev_net(ifp
->idev
->dev
), f6i
);
1242 if (!(f6i
->fib6_flags
& RTF_EXPIRES
))
1243 fib6_set_expires(f6i
, expires
);
1244 fib6_info_release(f6i
);
1250 /* This function wants to get referenced ifp and releases it before return */
1252 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
1255 enum cleanup_prefix_rt_t action
= CLEANUP_PREFIX_RT_NOP
;
1256 unsigned long expires
;
1260 spin_lock_bh(&ifp
->lock
);
1262 ifp
->state
= INET6_IFADDR_STATE_DEAD
;
1263 spin_unlock_bh(&ifp
->lock
);
1265 if (state
== INET6_IFADDR_STATE_DEAD
)
1268 spin_lock_bh(&addrconf_hash_lock
);
1269 hlist_del_init_rcu(&ifp
->addr_lst
);
1270 spin_unlock_bh(&addrconf_hash_lock
);
1272 write_lock_bh(&ifp
->idev
->lock
);
1274 if (ifp
->flags
&IFA_F_TEMPORARY
) {
1275 list_del(&ifp
->tmp_list
);
1277 in6_ifa_put(ifp
->ifpub
);
1283 if (ifp
->flags
& IFA_F_PERMANENT
&& !(ifp
->flags
& IFA_F_NOPREFIXROUTE
))
1284 action
= check_cleanup_prefix_route(ifp
, &expires
);
1286 list_del_rcu(&ifp
->if_list
);
1289 write_unlock_bh(&ifp
->idev
->lock
);
1291 addrconf_del_dad_work(ifp
);
1293 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
1295 inet6addr_notifier_call_chain(NETDEV_DOWN
, ifp
);
1297 if (action
!= CLEANUP_PREFIX_RT_NOP
) {
1298 cleanup_prefix_route(ifp
, expires
,
1299 action
== CLEANUP_PREFIX_RT_DEL
);
1302 /* clean up prefsrc entries */
1303 rt6_remove_prefsrc(ifp
);
1308 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
,
1309 struct inet6_ifaddr
*ift
,
1312 struct inet6_dev
*idev
= ifp
->idev
;
1313 struct in6_addr addr
, *tmpaddr
;
1314 unsigned long tmp_tstamp
, age
;
1315 unsigned long regen_advance
;
1316 struct ifa6_config cfg
;
1318 unsigned long now
= jiffies
;
1319 long max_desync_factor
;
1320 s32 cnf_temp_preferred_lft
;
1322 write_lock_bh(&idev
->lock
);
1324 spin_lock_bh(&ift
->lock
);
1325 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
1326 spin_unlock_bh(&ift
->lock
);
1333 if (idev
->cnf
.use_tempaddr
<= 0) {
1334 write_unlock_bh(&idev
->lock
);
1335 pr_info("%s: use_tempaddr is disabled\n", __func__
);
1340 spin_lock_bh(&ifp
->lock
);
1341 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
1342 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
1343 spin_unlock_bh(&ifp
->lock
);
1344 write_unlock_bh(&idev
->lock
);
1345 pr_warn("%s: regeneration time exceeded - disabled temporary address support\n",
1352 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
1353 ipv6_try_regen_rndid(idev
, tmpaddr
);
1354 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
1355 age
= (now
- ifp
->tstamp
) / HZ
;
1357 regen_advance
= idev
->cnf
.regen_max_retry
*
1358 idev
->cnf
.dad_transmits
*
1359 NEIGH_VAR(idev
->nd_parms
, RETRANS_TIME
) / HZ
;
1361 /* recalculate max_desync_factor each time and update
1362 * idev->desync_factor if it's larger
1364 cnf_temp_preferred_lft
= READ_ONCE(idev
->cnf
.temp_prefered_lft
);
1365 max_desync_factor
= min_t(__u32
,
1366 idev
->cnf
.max_desync_factor
,
1367 cnf_temp_preferred_lft
- regen_advance
);
1369 if (unlikely(idev
->desync_factor
> max_desync_factor
)) {
1370 if (max_desync_factor
> 0) {
1371 get_random_bytes(&idev
->desync_factor
,
1372 sizeof(idev
->desync_factor
));
1373 idev
->desync_factor
%= max_desync_factor
;
1375 idev
->desync_factor
= 0;
1379 memset(&cfg
, 0, sizeof(cfg
));
1380 cfg
.valid_lft
= min_t(__u32
, ifp
->valid_lft
,
1381 idev
->cnf
.temp_valid_lft
+ age
);
1382 cfg
.preferred_lft
= cnf_temp_preferred_lft
+ age
- idev
->desync_factor
;
1383 cfg
.preferred_lft
= min_t(__u32
, ifp
->prefered_lft
, cfg
.preferred_lft
);
1385 cfg
.plen
= ifp
->prefix_len
;
1386 tmp_tstamp
= ifp
->tstamp
;
1387 spin_unlock_bh(&ifp
->lock
);
1389 write_unlock_bh(&idev
->lock
);
1391 /* A temporary address is created only if this calculated Preferred
1392 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
1393 * an implementation must not create a temporary address with a zero
1394 * Preferred Lifetime.
1395 * Use age calculation as in addrconf_verify to avoid unnecessary
1396 * temporary addresses being generated.
1398 age
= (now
- tmp_tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
1399 if (cfg
.preferred_lft
<= regen_advance
+ age
) {
1406 cfg
.ifa_flags
= IFA_F_TEMPORARY
;
1407 /* set in addrconf_prefix_rcv() */
1408 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
1409 cfg
.ifa_flags
|= IFA_F_OPTIMISTIC
;
1412 cfg
.scope
= ipv6_addr_scope(cfg
.pfx
);
1414 ift
= ipv6_add_addr(idev
, &cfg
, block
, NULL
);
1418 pr_info("%s: retry temporary address regeneration\n", __func__
);
1420 write_lock_bh(&idev
->lock
);
1424 spin_lock_bh(&ift
->lock
);
1427 ift
->tstamp
= tmp_tstamp
;
1428 spin_unlock_bh(&ift
->lock
);
1430 addrconf_dad_start(ift
);
1438 * Choose an appropriate source address (RFC3484)
1441 IPV6_SADDR_RULE_INIT
= 0,
1442 IPV6_SADDR_RULE_LOCAL
,
1443 IPV6_SADDR_RULE_SCOPE
,
1444 IPV6_SADDR_RULE_PREFERRED
,
1445 #ifdef CONFIG_IPV6_MIP6
1446 IPV6_SADDR_RULE_HOA
,
1448 IPV6_SADDR_RULE_OIF
,
1449 IPV6_SADDR_RULE_LABEL
,
1450 IPV6_SADDR_RULE_PRIVACY
,
1451 IPV6_SADDR_RULE_ORCHID
,
1452 IPV6_SADDR_RULE_PREFIX
,
1453 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1454 IPV6_SADDR_RULE_NOT_OPTIMISTIC
,
1459 struct ipv6_saddr_score
{
1462 struct inet6_ifaddr
*ifa
;
1463 DECLARE_BITMAP(scorebits
, IPV6_SADDR_RULE_MAX
);
1468 struct ipv6_saddr_dst
{
1469 const struct in6_addr
*addr
;
1476 static inline int ipv6_saddr_preferred(int type
)
1478 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|IPV6_ADDR_LOOPBACK
))
1483 static bool ipv6_use_optimistic_addr(struct net
*net
,
1484 struct inet6_dev
*idev
)
1486 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1489 if (!net
->ipv6
.devconf_all
->optimistic_dad
&& !idev
->cnf
.optimistic_dad
)
1491 if (!net
->ipv6
.devconf_all
->use_optimistic
&& !idev
->cnf
.use_optimistic
)
1500 static bool ipv6_allow_optimistic_dad(struct net
*net
,
1501 struct inet6_dev
*idev
)
1503 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1506 if (!net
->ipv6
.devconf_all
->optimistic_dad
&& !idev
->cnf
.optimistic_dad
)
1515 static int ipv6_get_saddr_eval(struct net
*net
,
1516 struct ipv6_saddr_score
*score
,
1517 struct ipv6_saddr_dst
*dst
,
1522 if (i
<= score
->rule
) {
1524 case IPV6_SADDR_RULE_SCOPE
:
1525 ret
= score
->scopedist
;
1527 case IPV6_SADDR_RULE_PREFIX
:
1528 ret
= score
->matchlen
;
1531 ret
= !!test_bit(i
, score
->scorebits
);
1537 case IPV6_SADDR_RULE_INIT
:
1538 /* Rule 0: remember if hiscore is not ready yet */
1541 case IPV6_SADDR_RULE_LOCAL
:
1542 /* Rule 1: Prefer same address */
1543 ret
= ipv6_addr_equal(&score
->ifa
->addr
, dst
->addr
);
1545 case IPV6_SADDR_RULE_SCOPE
:
1546 /* Rule 2: Prefer appropriate scope
1551 * ---+--+-+---> scope
1553 * | d is scope of the destination.
1555 * | \ <- smaller scope is better if
1556 * B-15 | \ if scope is enough for destination.
1557 * | ret = B - scope (-1 <= scope >= d <= 15).
1559 * |/ <- greater is better
1560 * -C / if scope is not enough for destination.
1561 * /| ret = scope - C (-1 <= d < scope <= 15).
1563 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1564 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1565 * Assume B = 0 and we get C > 29.
1567 ret
= __ipv6_addr_src_scope(score
->addr_type
);
1568 if (ret
>= dst
->scope
)
1571 ret
-= 128; /* 30 is enough */
1572 score
->scopedist
= ret
;
1574 case IPV6_SADDR_RULE_PREFERRED
:
1576 /* Rule 3: Avoid deprecated and optimistic addresses */
1577 u8 avoid
= IFA_F_DEPRECATED
;
1579 if (!ipv6_use_optimistic_addr(net
, score
->ifa
->idev
))
1580 avoid
|= IFA_F_OPTIMISTIC
;
1581 ret
= ipv6_saddr_preferred(score
->addr_type
) ||
1582 !(score
->ifa
->flags
& avoid
);
1585 #ifdef CONFIG_IPV6_MIP6
1586 case IPV6_SADDR_RULE_HOA
:
1588 /* Rule 4: Prefer home address */
1589 int prefhome
= !(dst
->prefs
& IPV6_PREFER_SRC_COA
);
1590 ret
= !(score
->ifa
->flags
& IFA_F_HOMEADDRESS
) ^ prefhome
;
1594 case IPV6_SADDR_RULE_OIF
:
1595 /* Rule 5: Prefer outgoing interface */
1596 ret
= (!dst
->ifindex
||
1597 dst
->ifindex
== score
->ifa
->idev
->dev
->ifindex
);
1599 case IPV6_SADDR_RULE_LABEL
:
1600 /* Rule 6: Prefer matching label */
1601 ret
= ipv6_addr_label(net
,
1602 &score
->ifa
->addr
, score
->addr_type
,
1603 score
->ifa
->idev
->dev
->ifindex
) == dst
->label
;
1605 case IPV6_SADDR_RULE_PRIVACY
:
1607 /* Rule 7: Prefer public address
1608 * Note: prefer temporary address if use_tempaddr >= 2
1610 int preftmp
= dst
->prefs
& (IPV6_PREFER_SRC_PUBLIC
|IPV6_PREFER_SRC_TMP
) ?
1611 !!(dst
->prefs
& IPV6_PREFER_SRC_TMP
) :
1612 score
->ifa
->idev
->cnf
.use_tempaddr
>= 2;
1613 ret
= (!(score
->ifa
->flags
& IFA_F_TEMPORARY
)) ^ preftmp
;
1616 case IPV6_SADDR_RULE_ORCHID
:
1617 /* Rule 8-: Prefer ORCHID vs ORCHID or
1618 * non-ORCHID vs non-ORCHID
1620 ret
= !(ipv6_addr_orchid(&score
->ifa
->addr
) ^
1621 ipv6_addr_orchid(dst
->addr
));
1623 case IPV6_SADDR_RULE_PREFIX
:
1624 /* Rule 8: Use longest matching prefix */
1625 ret
= ipv6_addr_diff(&score
->ifa
->addr
, dst
->addr
);
1626 if (ret
> score
->ifa
->prefix_len
)
1627 ret
= score
->ifa
->prefix_len
;
1628 score
->matchlen
= ret
;
1630 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1631 case IPV6_SADDR_RULE_NOT_OPTIMISTIC
:
1632 /* Optimistic addresses still have lower precedence than other
1633 * preferred addresses.
1635 ret
= !(score
->ifa
->flags
& IFA_F_OPTIMISTIC
);
1643 __set_bit(i
, score
->scorebits
);
1649 static int __ipv6_dev_get_saddr(struct net
*net
,
1650 struct ipv6_saddr_dst
*dst
,
1651 struct inet6_dev
*idev
,
1652 struct ipv6_saddr_score
*scores
,
1655 struct ipv6_saddr_score
*score
= &scores
[1 - hiscore_idx
], *hiscore
= &scores
[hiscore_idx
];
1657 list_for_each_entry_rcu(score
->ifa
, &idev
->addr_list
, if_list
) {
1661 * - Tentative Address (RFC2462 section 5.4)
1662 * - A tentative address is not considered
1663 * "assigned to an interface" in the traditional
1664 * sense, unless it is also flagged as optimistic.
1665 * - Candidate Source Address (section 4)
1666 * - In any case, anycast addresses, multicast
1667 * addresses, and the unspecified address MUST
1668 * NOT be included in a candidate set.
1670 if ((score
->ifa
->flags
& IFA_F_TENTATIVE
) &&
1671 (!(score
->ifa
->flags
& IFA_F_OPTIMISTIC
)))
1674 score
->addr_type
= __ipv6_addr_type(&score
->ifa
->addr
);
1676 if (unlikely(score
->addr_type
== IPV6_ADDR_ANY
||
1677 score
->addr_type
& IPV6_ADDR_MULTICAST
)) {
1678 net_dbg_ratelimited("ADDRCONF: unspecified / multicast address assigned as unicast address on %s",
1684 bitmap_zero(score
->scorebits
, IPV6_SADDR_RULE_MAX
);
1686 for (i
= 0; i
< IPV6_SADDR_RULE_MAX
; i
++) {
1687 int minihiscore
, miniscore
;
1689 minihiscore
= ipv6_get_saddr_eval(net
, hiscore
, dst
, i
);
1690 miniscore
= ipv6_get_saddr_eval(net
, score
, dst
, i
);
1692 if (minihiscore
> miniscore
) {
1693 if (i
== IPV6_SADDR_RULE_SCOPE
&&
1694 score
->scopedist
> 0) {
1697 * each remaining entry
1698 * has too small (not enough)
1699 * scope, because ifa entries
1700 * are sorted by their scope
1706 } else if (minihiscore
< miniscore
) {
1707 swap(hiscore
, score
);
1708 hiscore_idx
= 1 - hiscore_idx
;
1710 /* restore our iterator */
1711 score
->ifa
= hiscore
->ifa
;
1721 static int ipv6_get_saddr_master(struct net
*net
,
1722 const struct net_device
*dst_dev
,
1723 const struct net_device
*master
,
1724 struct ipv6_saddr_dst
*dst
,
1725 struct ipv6_saddr_score
*scores
,
1728 struct inet6_dev
*idev
;
1730 idev
= __in6_dev_get(dst_dev
);
1732 hiscore_idx
= __ipv6_dev_get_saddr(net
, dst
, idev
,
1733 scores
, hiscore_idx
);
1735 idev
= __in6_dev_get(master
);
1737 hiscore_idx
= __ipv6_dev_get_saddr(net
, dst
, idev
,
1738 scores
, hiscore_idx
);
1743 int ipv6_dev_get_saddr(struct net
*net
, const struct net_device
*dst_dev
,
1744 const struct in6_addr
*daddr
, unsigned int prefs
,
1745 struct in6_addr
*saddr
)
1747 struct ipv6_saddr_score scores
[2], *hiscore
;
1748 struct ipv6_saddr_dst dst
;
1749 struct inet6_dev
*idev
;
1750 struct net_device
*dev
;
1752 bool use_oif_addr
= false;
1753 int hiscore_idx
= 0;
1756 dst_type
= __ipv6_addr_type(daddr
);
1758 dst
.ifindex
= dst_dev
? dst_dev
->ifindex
: 0;
1759 dst
.scope
= __ipv6_addr_src_scope(dst_type
);
1760 dst
.label
= ipv6_addr_label(net
, daddr
, dst_type
, dst
.ifindex
);
1763 scores
[hiscore_idx
].rule
= -1;
1764 scores
[hiscore_idx
].ifa
= NULL
;
1768 /* Candidate Source Address (section 4)
1769 * - multicast and link-local destination address,
1770 * the set of candidate source address MUST only
1771 * include addresses assigned to interfaces
1772 * belonging to the same link as the outgoing
1774 * (- For site-local destination addresses, the
1775 * set of candidate source addresses MUST only
1776 * include addresses assigned to interfaces
1777 * belonging to the same site as the outgoing
1779 * - "It is RECOMMENDED that the candidate source addresses
1780 * be the set of unicast addresses assigned to the
1781 * interface that will be used to send to the destination
1782 * (the 'outgoing' interface)." (RFC 6724)
1785 idev
= __in6_dev_get(dst_dev
);
1786 if ((dst_type
& IPV6_ADDR_MULTICAST
) ||
1787 dst
.scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
||
1788 (idev
&& idev
->cnf
.use_oif_addrs_only
)) {
1789 use_oif_addr
= true;
1795 hiscore_idx
= __ipv6_dev_get_saddr(net
, &dst
, idev
, scores
, hiscore_idx
);
1797 const struct net_device
*master
;
1800 /* if dst_dev exists and is enslaved to an L3 device, then
1801 * prefer addresses from dst_dev and then the master over
1802 * any other enslaved devices in the L3 domain.
1804 master
= l3mdev_master_dev_rcu(dst_dev
);
1806 master_idx
= master
->ifindex
;
1808 hiscore_idx
= ipv6_get_saddr_master(net
, dst_dev
,
1810 scores
, hiscore_idx
);
1812 if (scores
[hiscore_idx
].ifa
)
1816 for_each_netdev_rcu(net
, dev
) {
1817 /* only consider addresses on devices in the
1820 if (l3mdev_master_ifindex_rcu(dev
) != master_idx
)
1822 idev
= __in6_dev_get(dev
);
1825 hiscore_idx
= __ipv6_dev_get_saddr(net
, &dst
, idev
, scores
, hiscore_idx
);
1830 hiscore
= &scores
[hiscore_idx
];
1832 ret
= -EADDRNOTAVAIL
;
1834 *saddr
= hiscore
->ifa
->addr
;
1839 EXPORT_SYMBOL(ipv6_dev_get_saddr
);
1841 int __ipv6_get_lladdr(struct inet6_dev
*idev
, struct in6_addr
*addr
,
1844 struct inet6_ifaddr
*ifp
;
1845 int err
= -EADDRNOTAVAIL
;
1847 list_for_each_entry_reverse(ifp
, &idev
->addr_list
, if_list
) {
1848 if (ifp
->scope
> IFA_LINK
)
1850 if (ifp
->scope
== IFA_LINK
&&
1851 !(ifp
->flags
& banned_flags
)) {
1860 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1863 struct inet6_dev
*idev
;
1864 int err
= -EADDRNOTAVAIL
;
1867 idev
= __in6_dev_get(dev
);
1869 read_lock_bh(&idev
->lock
);
1870 err
= __ipv6_get_lladdr(idev
, addr
, banned_flags
);
1871 read_unlock_bh(&idev
->lock
);
1877 static int ipv6_count_addresses(const struct inet6_dev
*idev
)
1879 const struct inet6_ifaddr
*ifp
;
1883 list_for_each_entry_rcu(ifp
, &idev
->addr_list
, if_list
)
1889 int ipv6_chk_addr(struct net
*net
, const struct in6_addr
*addr
,
1890 const struct net_device
*dev
, int strict
)
1892 return ipv6_chk_addr_and_flags(net
, addr
, dev
, !dev
,
1893 strict
, IFA_F_TENTATIVE
);
1895 EXPORT_SYMBOL(ipv6_chk_addr
);
1897 /* device argument is used to find the L3 domain of interest. If
1898 * skip_dev_check is set, then the ifp device is not checked against
1899 * the passed in dev argument. So the 2 cases for addresses checks are:
1900 * 1. does the address exist in the L3 domain that dev is part of
1901 * (skip_dev_check = true), or
1903 * 2. does the address exist on the specific device
1904 * (skip_dev_check = false)
1906 int ipv6_chk_addr_and_flags(struct net
*net
, const struct in6_addr
*addr
,
1907 const struct net_device
*dev
, bool skip_dev_check
,
1908 int strict
, u32 banned_flags
)
1910 unsigned int hash
= inet6_addr_hash(net
, addr
);
1911 const struct net_device
*l3mdev
;
1912 struct inet6_ifaddr
*ifp
;
1917 l3mdev
= l3mdev_master_dev_rcu(dev
);
1921 hlist_for_each_entry_rcu(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1922 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1925 if (l3mdev_master_dev_rcu(ifp
->idev
->dev
) != l3mdev
)
1928 /* Decouple optimistic from tentative for evaluation here.
1929 * Ban optimistic addresses explicitly, when required.
1931 ifp_flags
= (ifp
->flags
&IFA_F_OPTIMISTIC
)
1932 ? (ifp
->flags
&~IFA_F_TENTATIVE
)
1934 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1935 !(ifp_flags
&banned_flags
) &&
1936 (!dev
|| ifp
->idev
->dev
== dev
||
1937 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))) {
1946 EXPORT_SYMBOL(ipv6_chk_addr_and_flags
);
1949 /* Compares an address/prefix_len with addresses on device @dev.
1950 * If one is found it returns true.
1952 bool ipv6_chk_custom_prefix(const struct in6_addr
*addr
,
1953 const unsigned int prefix_len
, struct net_device
*dev
)
1955 const struct inet6_ifaddr
*ifa
;
1956 const struct inet6_dev
*idev
;
1960 idev
= __in6_dev_get(dev
);
1962 list_for_each_entry_rcu(ifa
, &idev
->addr_list
, if_list
) {
1963 ret
= ipv6_prefix_equal(addr
, &ifa
->addr
, prefix_len
);
1972 EXPORT_SYMBOL(ipv6_chk_custom_prefix
);
1974 int ipv6_chk_prefix(const struct in6_addr
*addr
, struct net_device
*dev
)
1976 const struct inet6_ifaddr
*ifa
;
1977 const struct inet6_dev
*idev
;
1982 idev
= __in6_dev_get(dev
);
1984 list_for_each_entry_rcu(ifa
, &idev
->addr_list
, if_list
) {
1985 onlink
= ipv6_prefix_equal(addr
, &ifa
->addr
,
1994 EXPORT_SYMBOL(ipv6_chk_prefix
);
1996 struct inet6_ifaddr
*ipv6_get_ifaddr(struct net
*net
, const struct in6_addr
*addr
,
1997 struct net_device
*dev
, int strict
)
1999 unsigned int hash
= inet6_addr_hash(net
, addr
);
2000 struct inet6_ifaddr
*ifp
, *result
= NULL
;
2003 hlist_for_each_entry_rcu(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
2004 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
2006 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
2007 if (!dev
|| ifp
->idev
->dev
== dev
||
2008 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
2020 /* Gets referenced address, destroys ifaddr */
2022 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
, int dad_failed
)
2025 ifp
->flags
|= IFA_F_DADFAILED
;
2027 if (ifp
->flags
&IFA_F_TEMPORARY
) {
2028 struct inet6_ifaddr
*ifpub
;
2029 spin_lock_bh(&ifp
->lock
);
2032 in6_ifa_hold(ifpub
);
2033 spin_unlock_bh(&ifp
->lock
);
2034 ipv6_create_tempaddr(ifpub
, ifp
, true);
2037 spin_unlock_bh(&ifp
->lock
);
2040 } else if (ifp
->flags
&IFA_F_PERMANENT
|| !dad_failed
) {
2041 spin_lock_bh(&ifp
->lock
);
2042 addrconf_del_dad_work(ifp
);
2043 ifp
->flags
|= IFA_F_TENTATIVE
;
2045 ifp
->flags
&= ~IFA_F_OPTIMISTIC
;
2046 spin_unlock_bh(&ifp
->lock
);
2048 ipv6_ifa_notify(0, ifp
);
2055 static int addrconf_dad_end(struct inet6_ifaddr
*ifp
)
2059 spin_lock_bh(&ifp
->lock
);
2060 if (ifp
->state
== INET6_IFADDR_STATE_DAD
) {
2061 ifp
->state
= INET6_IFADDR_STATE_POSTDAD
;
2064 spin_unlock_bh(&ifp
->lock
);
2069 void addrconf_dad_failure(struct sk_buff
*skb
, struct inet6_ifaddr
*ifp
)
2071 struct inet6_dev
*idev
= ifp
->idev
;
2072 struct net
*net
= dev_net(ifp
->idev
->dev
);
2074 if (addrconf_dad_end(ifp
)) {
2079 net_info_ratelimited("%s: IPv6 duplicate address %pI6c used by %pM detected!\n",
2080 ifp
->idev
->dev
->name
, &ifp
->addr
, eth_hdr(skb
)->h_source
);
2082 spin_lock_bh(&ifp
->lock
);
2084 if (ifp
->flags
& IFA_F_STABLE_PRIVACY
) {
2085 struct in6_addr new_addr
;
2086 struct inet6_ifaddr
*ifp2
;
2087 int retries
= ifp
->stable_privacy_retry
+ 1;
2088 struct ifa6_config cfg
= {
2090 .plen
= ifp
->prefix_len
,
2091 .ifa_flags
= ifp
->flags
,
2092 .valid_lft
= ifp
->valid_lft
,
2093 .preferred_lft
= ifp
->prefered_lft
,
2094 .scope
= ifp
->scope
,
2097 if (retries
> net
->ipv6
.sysctl
.idgen_retries
) {
2098 net_info_ratelimited("%s: privacy stable address generation failed because of DAD conflicts!\n",
2099 ifp
->idev
->dev
->name
);
2103 new_addr
= ifp
->addr
;
2104 if (ipv6_generate_stable_address(&new_addr
, retries
,
2108 spin_unlock_bh(&ifp
->lock
);
2110 if (idev
->cnf
.max_addresses
&&
2111 ipv6_count_addresses(idev
) >=
2112 idev
->cnf
.max_addresses
)
2115 net_info_ratelimited("%s: generating new stable privacy address because of DAD conflict\n",
2116 ifp
->idev
->dev
->name
);
2118 ifp2
= ipv6_add_addr(idev
, &cfg
, false, NULL
);
2122 spin_lock_bh(&ifp2
->lock
);
2123 ifp2
->stable_privacy_retry
= retries
;
2124 ifp2
->state
= INET6_IFADDR_STATE_PREDAD
;
2125 spin_unlock_bh(&ifp2
->lock
);
2127 addrconf_mod_dad_work(ifp2
, net
->ipv6
.sysctl
.idgen_delay
);
2130 spin_lock_bh(&ifp
->lock
);
2134 /* transition from _POSTDAD to _ERRDAD */
2135 ifp
->state
= INET6_IFADDR_STATE_ERRDAD
;
2136 spin_unlock_bh(&ifp
->lock
);
2138 addrconf_mod_dad_work(ifp
, 0);
2142 /* Join to solicited addr multicast group.
2143 * caller must hold RTNL */
2144 void addrconf_join_solict(struct net_device
*dev
, const struct in6_addr
*addr
)
2146 struct in6_addr maddr
;
2148 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
2151 addrconf_addr_solict_mult(addr
, &maddr
);
2152 ipv6_dev_mc_inc(dev
, &maddr
);
2155 /* caller must hold RTNL */
2156 void addrconf_leave_solict(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
2158 struct in6_addr maddr
;
2160 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
2163 addrconf_addr_solict_mult(addr
, &maddr
);
2164 __ipv6_dev_mc_dec(idev
, &maddr
);
2167 /* caller must hold RTNL */
2168 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
2170 struct in6_addr addr
;
2172 if (ifp
->prefix_len
>= 127) /* RFC 6164 */
2174 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
2175 if (ipv6_addr_any(&addr
))
2177 __ipv6_dev_ac_inc(ifp
->idev
, &addr
);
2180 /* caller must hold RTNL */
2181 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
2183 struct in6_addr addr
;
2185 if (ifp
->prefix_len
>= 127) /* RFC 6164 */
2187 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
2188 if (ipv6_addr_any(&addr
))
2190 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
2193 static int addrconf_ifid_6lowpan(u8
*eui
, struct net_device
*dev
)
2195 switch (dev
->addr_len
) {
2197 memcpy(eui
, dev
->dev_addr
, 3);
2200 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
2202 case EUI64_ADDR_LEN
:
2203 memcpy(eui
, dev
->dev_addr
, EUI64_ADDR_LEN
);
2213 static int addrconf_ifid_ieee1394(u8
*eui
, struct net_device
*dev
)
2215 union fwnet_hwaddr
*ha
;
2217 if (dev
->addr_len
!= FWNET_ALEN
)
2220 ha
= (union fwnet_hwaddr
*)dev
->dev_addr
;
2222 memcpy(eui
, &ha
->uc
.uniq_id
, sizeof(ha
->uc
.uniq_id
));
2227 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
2229 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
2230 if (dev
->addr_len
!= ARCNET_ALEN
)
2233 eui
[7] = *(u8
*)dev
->dev_addr
;
2237 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
2239 if (dev
->addr_len
!= INFINIBAND_ALEN
)
2241 memcpy(eui
, dev
->dev_addr
+ 12, 8);
2246 static int __ipv6_isatap_ifid(u8
*eui
, __be32 addr
)
2250 eui
[0] = (ipv4_is_zeronet(addr
) || ipv4_is_private_10(addr
) ||
2251 ipv4_is_loopback(addr
) || ipv4_is_linklocal_169(addr
) ||
2252 ipv4_is_private_172(addr
) || ipv4_is_test_192(addr
) ||
2253 ipv4_is_anycast_6to4(addr
) || ipv4_is_private_192(addr
) ||
2254 ipv4_is_test_198(addr
) || ipv4_is_multicast(addr
) ||
2255 ipv4_is_lbcast(addr
)) ? 0x00 : 0x02;
2259 memcpy(eui
+ 4, &addr
, 4);
2263 static int addrconf_ifid_sit(u8
*eui
, struct net_device
*dev
)
2265 if (dev
->priv_flags
& IFF_ISATAP
)
2266 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
2270 static int addrconf_ifid_gre(u8
*eui
, struct net_device
*dev
)
2272 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
2275 static int addrconf_ifid_ip6tnl(u8
*eui
, struct net_device
*dev
)
2277 memcpy(eui
, dev
->perm_addr
, 3);
2278 memcpy(eui
+ 5, dev
->perm_addr
+ 3, 3);
2285 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
2287 switch (dev
->type
) {
2290 return addrconf_ifid_eui48(eui
, dev
);
2292 return addrconf_ifid_arcnet(eui
, dev
);
2293 case ARPHRD_INFINIBAND
:
2294 return addrconf_ifid_infiniband(eui
, dev
);
2296 return addrconf_ifid_sit(eui
, dev
);
2299 return addrconf_ifid_gre(eui
, dev
);
2300 case ARPHRD_6LOWPAN
:
2301 return addrconf_ifid_6lowpan(eui
, dev
);
2302 case ARPHRD_IEEE1394
:
2303 return addrconf_ifid_ieee1394(eui
, dev
);
2304 case ARPHRD_TUNNEL6
:
2307 return addrconf_ifid_ip6tnl(eui
, dev
);
2312 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
2315 struct inet6_ifaddr
*ifp
;
2317 read_lock_bh(&idev
->lock
);
2318 list_for_each_entry_reverse(ifp
, &idev
->addr_list
, if_list
) {
2319 if (ifp
->scope
> IFA_LINK
)
2321 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2322 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
2327 read_unlock_bh(&idev
->lock
);
2331 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
2332 static void ipv6_regen_rndid(struct inet6_dev
*idev
)
2335 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
2336 idev
->rndid
[0] &= ~0x02;
2339 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
2340 * check if generated address is not inappropriate
2342 * - Reserved subnet anycast (RFC 2526)
2343 * 11111101 11....11 1xxxxxxx
2344 * - ISATAP (RFC4214) 6.1
2345 * 00-00-5E-FE-xx-xx-xx-xx
2347 * - XXX: already assigned to an address on the device
2349 if (idev
->rndid
[0] == 0xfd &&
2350 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
2351 (idev
->rndid
[7]&0x80))
2353 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
2354 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
2356 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
2361 static void ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
)
2363 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
2364 ipv6_regen_rndid(idev
);
2372 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, u32 metric
,
2373 struct net_device
*dev
, unsigned long expires
,
2374 u32 flags
, gfp_t gfp_flags
)
2376 struct fib6_config cfg
= {
2377 .fc_table
= l3mdev_fib_table(dev
) ? : RT6_TABLE_PREFIX
,
2378 .fc_metric
= metric
? : IP6_RT_PRIO_ADDRCONF
,
2379 .fc_ifindex
= dev
->ifindex
,
2380 .fc_expires
= expires
,
2382 .fc_flags
= RTF_UP
| flags
,
2383 .fc_nlinfo
.nl_net
= dev_net(dev
),
2384 .fc_protocol
= RTPROT_KERNEL
,
2385 .fc_type
= RTN_UNICAST
,
2390 /* Prevent useless cloning on PtP SIT.
2391 This thing is done here expecting that the whole
2392 class of non-broadcast devices need not cloning.
2394 #if IS_ENABLED(CONFIG_IPV6_SIT)
2395 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
2396 cfg
.fc_flags
|= RTF_NONEXTHOP
;
2399 ip6_route_add(&cfg
, gfp_flags
, NULL
);
2403 static struct fib6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
2405 const struct net_device
*dev
,
2406 u32 flags
, u32 noflags
,
2409 struct fib6_node
*fn
;
2410 struct fib6_info
*rt
= NULL
;
2411 struct fib6_table
*table
;
2412 u32 tb_id
= l3mdev_fib_table(dev
) ? : RT6_TABLE_PREFIX
;
2414 table
= fib6_get_table(dev_net(dev
), tb_id
);
2419 fn
= fib6_locate(&table
->tb6_root
, pfx
, plen
, NULL
, 0, true);
2423 for_each_fib6_node_rt_rcu(fn
) {
2424 if (rt
->fib6_nh
.fib_nh_dev
->ifindex
!= dev
->ifindex
)
2426 if (no_gw
&& rt
->fib6_nh
.fib_nh_gw_family
)
2428 if ((rt
->fib6_flags
& flags
) != flags
)
2430 if ((rt
->fib6_flags
& noflags
) != 0)
2432 if (!fib6_info_hold_safe(rt
))
2442 /* Create "default" multicast route to the interface */
2444 static void addrconf_add_mroute(struct net_device
*dev
)
2446 struct fib6_config cfg
= {
2447 .fc_table
= l3mdev_fib_table(dev
) ? : RT6_TABLE_LOCAL
,
2448 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
2449 .fc_ifindex
= dev
->ifindex
,
2452 .fc_type
= RTN_UNICAST
,
2453 .fc_nlinfo
.nl_net
= dev_net(dev
),
2456 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
2458 ip6_route_add(&cfg
, GFP_KERNEL
, NULL
);
2461 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
2463 struct inet6_dev
*idev
;
2467 idev
= ipv6_find_idev(dev
);
2469 return ERR_PTR(-ENOBUFS
);
2471 if (idev
->cnf
.disable_ipv6
)
2472 return ERR_PTR(-EACCES
);
2474 /* Add default multicast route */
2475 if (!(dev
->flags
& IFF_LOOPBACK
) && !netif_is_l3_master(dev
))
2476 addrconf_add_mroute(dev
);
2481 static void manage_tempaddrs(struct inet6_dev
*idev
,
2482 struct inet6_ifaddr
*ifp
,
2483 __u32 valid_lft
, __u32 prefered_lft
,
2484 bool create
, unsigned long now
)
2487 struct inet6_ifaddr
*ift
;
2489 read_lock_bh(&idev
->lock
);
2490 /* update all temporary addresses in the list */
2491 list_for_each_entry(ift
, &idev
->tempaddr_list
, tmp_list
) {
2492 int age
, max_valid
, max_prefered
;
2494 if (ifp
!= ift
->ifpub
)
2497 /* RFC 4941 section 3.3:
2498 * If a received option will extend the lifetime of a public
2499 * address, the lifetimes of temporary addresses should
2500 * be extended, subject to the overall constraint that no
2501 * temporary addresses should ever remain "valid" or "preferred"
2502 * for a time longer than (TEMP_VALID_LIFETIME) or
2503 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), respectively.
2505 age
= (now
- ift
->cstamp
) / HZ
;
2506 max_valid
= idev
->cnf
.temp_valid_lft
- age
;
2510 max_prefered
= idev
->cnf
.temp_prefered_lft
-
2511 idev
->desync_factor
- age
;
2512 if (max_prefered
< 0)
2515 if (valid_lft
> max_valid
)
2516 valid_lft
= max_valid
;
2518 if (prefered_lft
> max_prefered
)
2519 prefered_lft
= max_prefered
;
2521 spin_lock(&ift
->lock
);
2523 ift
->valid_lft
= valid_lft
;
2524 ift
->prefered_lft
= prefered_lft
;
2526 if (prefered_lft
> 0)
2527 ift
->flags
&= ~IFA_F_DEPRECATED
;
2529 spin_unlock(&ift
->lock
);
2530 if (!(flags
&IFA_F_TENTATIVE
))
2531 ipv6_ifa_notify(0, ift
);
2534 if ((create
|| list_empty(&idev
->tempaddr_list
)) &&
2535 idev
->cnf
.use_tempaddr
> 0) {
2536 /* When a new public address is created as described
2537 * in [ADDRCONF], also create a new temporary address.
2538 * Also create a temporary address if it's enabled but
2539 * no temporary address currently exists.
2541 read_unlock_bh(&idev
->lock
);
2542 ipv6_create_tempaddr(ifp
, NULL
, false);
2544 read_unlock_bh(&idev
->lock
);
2548 static bool is_addr_mode_generate_stable(struct inet6_dev
*idev
)
2550 return idev
->cnf
.addr_gen_mode
== IN6_ADDR_GEN_MODE_STABLE_PRIVACY
||
2551 idev
->cnf
.addr_gen_mode
== IN6_ADDR_GEN_MODE_RANDOM
;
2554 int addrconf_prefix_rcv_add_addr(struct net
*net
, struct net_device
*dev
,
2555 const struct prefix_info
*pinfo
,
2556 struct inet6_dev
*in6_dev
,
2557 const struct in6_addr
*addr
, int addr_type
,
2558 u32 addr_flags
, bool sllao
, bool tokenized
,
2559 __u32 valid_lft
, u32 prefered_lft
)
2561 struct inet6_ifaddr
*ifp
= ipv6_get_ifaddr(net
, addr
, dev
, 1);
2562 int create
= 0, update_lft
= 0;
2564 if (!ifp
&& valid_lft
) {
2565 int max_addresses
= in6_dev
->cnf
.max_addresses
;
2566 struct ifa6_config cfg
= {
2568 .plen
= pinfo
->prefix_len
,
2569 .ifa_flags
= addr_flags
,
2570 .valid_lft
= valid_lft
,
2571 .preferred_lft
= prefered_lft
,
2572 .scope
= addr_type
& IPV6_ADDR_SCOPE_MASK
,
2575 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2576 if ((net
->ipv6
.devconf_all
->optimistic_dad
||
2577 in6_dev
->cnf
.optimistic_dad
) &&
2578 !net
->ipv6
.devconf_all
->forwarding
&& sllao
)
2579 cfg
.ifa_flags
|= IFA_F_OPTIMISTIC
;
2582 /* Do not allow to create too much of autoconfigured
2583 * addresses; this would be too easy way to crash kernel.
2585 if (!max_addresses
||
2586 ipv6_count_addresses(in6_dev
) < max_addresses
)
2587 ifp
= ipv6_add_addr(in6_dev
, &cfg
, false, NULL
);
2589 if (IS_ERR_OR_NULL(ifp
))
2593 spin_lock_bh(&ifp
->lock
);
2594 ifp
->flags
|= IFA_F_MANAGETEMPADDR
;
2595 ifp
->cstamp
= jiffies
;
2596 ifp
->tokenized
= tokenized
;
2597 spin_unlock_bh(&ifp
->lock
);
2598 addrconf_dad_start(ifp
);
2606 /* update lifetime (RFC2462 5.5.3 e) */
2607 spin_lock_bh(&ifp
->lock
);
2609 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
2610 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
2613 if (!create
&& stored_lft
) {
2614 const u32 minimum_lft
= min_t(u32
,
2615 stored_lft
, MIN_VALID_LIFETIME
);
2616 valid_lft
= max(valid_lft
, minimum_lft
);
2618 /* RFC4862 Section 5.5.3e:
2619 * "Note that the preferred lifetime of the
2620 * corresponding address is always reset to
2621 * the Preferred Lifetime in the received
2622 * Prefix Information option, regardless of
2623 * whether the valid lifetime is also reset or
2626 * So we should always update prefered_lft here.
2632 ifp
->valid_lft
= valid_lft
;
2633 ifp
->prefered_lft
= prefered_lft
;
2636 ifp
->flags
&= ~IFA_F_DEPRECATED
;
2637 spin_unlock_bh(&ifp
->lock
);
2639 if (!(flags
&IFA_F_TENTATIVE
))
2640 ipv6_ifa_notify(0, ifp
);
2642 spin_unlock_bh(&ifp
->lock
);
2644 manage_tempaddrs(in6_dev
, ifp
, valid_lft
, prefered_lft
,
2653 EXPORT_SYMBOL_GPL(addrconf_prefix_rcv_add_addr
);
2655 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
, bool sllao
)
2657 struct prefix_info
*pinfo
;
2662 struct inet6_dev
*in6_dev
;
2663 struct net
*net
= dev_net(dev
);
2665 pinfo
= (struct prefix_info
*) opt
;
2667 if (len
< sizeof(struct prefix_info
)) {
2668 netdev_dbg(dev
, "addrconf: prefix option too short\n");
2673 * Validation checks ([ADDRCONF], page 19)
2676 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
2678 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
2681 valid_lft
= ntohl(pinfo
->valid
);
2682 prefered_lft
= ntohl(pinfo
->prefered
);
2684 if (prefered_lft
> valid_lft
) {
2685 net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n");
2689 in6_dev
= in6_dev_get(dev
);
2692 net_dbg_ratelimited("addrconf: device %s not configured\n",
2698 * Two things going on here:
2699 * 1) Add routes for on-link prefixes
2700 * 2) Configure prefixes with the auto flag set
2703 if (pinfo
->onlink
) {
2704 struct fib6_info
*rt
;
2705 unsigned long rt_expires
;
2707 /* Avoid arithmetic overflow. Really, we could
2708 * save rt_expires in seconds, likely valid_lft,
2709 * but it would require division in fib gc, that it
2713 rt_expires
= addrconf_timeout_fixup(valid_lft
, HZ
);
2715 rt_expires
= addrconf_timeout_fixup(valid_lft
, USER_HZ
);
2717 if (addrconf_finite_timeout(rt_expires
))
2720 rt
= addrconf_get_prefix_route(&pinfo
->prefix
,
2723 RTF_ADDRCONF
| RTF_PREFIX_RT
,
2727 /* Autoconf prefix route */
2728 if (valid_lft
== 0) {
2729 ip6_del_rt(net
, rt
);
2731 } else if (addrconf_finite_timeout(rt_expires
)) {
2733 fib6_set_expires(rt
, jiffies
+ rt_expires
);
2735 fib6_clean_expires(rt
);
2737 } else if (valid_lft
) {
2738 clock_t expires
= 0;
2739 int flags
= RTF_ADDRCONF
| RTF_PREFIX_RT
;
2740 if (addrconf_finite_timeout(rt_expires
)) {
2742 flags
|= RTF_EXPIRES
;
2743 expires
= jiffies_to_clock_t(rt_expires
);
2745 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
2746 0, dev
, expires
, flags
,
2749 fib6_info_release(rt
);
2752 /* Try to figure out our local address for this prefix */
2754 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
2755 struct in6_addr addr
;
2756 bool tokenized
= false, dev_addr_generated
= false;
2758 if (pinfo
->prefix_len
== 64) {
2759 memcpy(&addr
, &pinfo
->prefix
, 8);
2761 if (!ipv6_addr_any(&in6_dev
->token
)) {
2762 read_lock_bh(&in6_dev
->lock
);
2763 memcpy(addr
.s6_addr
+ 8,
2764 in6_dev
->token
.s6_addr
+ 8, 8);
2765 read_unlock_bh(&in6_dev
->lock
);
2767 } else if (is_addr_mode_generate_stable(in6_dev
) &&
2768 !ipv6_generate_stable_address(&addr
, 0,
2770 addr_flags
|= IFA_F_STABLE_PRIVACY
;
2772 } else if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
2773 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
2776 dev_addr_generated
= true;
2780 net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n",
2785 err
= addrconf_prefix_rcv_add_addr(net
, dev
, pinfo
, in6_dev
,
2788 tokenized
, valid_lft
,
2793 /* Ignore error case here because previous prefix add addr was
2794 * successful which will be notified.
2796 ndisc_ops_prefix_rcv_add_addr(net
, dev
, pinfo
, in6_dev
, &addr
,
2797 addr_type
, addr_flags
, sllao
,
2798 tokenized
, valid_lft
,
2800 dev_addr_generated
);
2802 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
2804 in6_dev_put(in6_dev
);
2808 * Set destination address.
2809 * Special case for SIT interfaces where we create a new "virtual"
2812 int addrconf_set_dstaddr(struct net
*net
, void __user
*arg
)
2814 struct in6_ifreq ireq
;
2815 struct net_device
*dev
;
2821 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2824 dev
= __dev_get_by_index(net
, ireq
.ifr6_ifindex
);
2830 #if IS_ENABLED(CONFIG_IPV6_SIT)
2831 if (dev
->type
== ARPHRD_SIT
) {
2832 const struct net_device_ops
*ops
= dev
->netdev_ops
;
2834 struct ip_tunnel_parm p
;
2836 err
= -EADDRNOTAVAIL
;
2837 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
2840 memset(&p
, 0, sizeof(p
));
2841 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
2845 p
.iph
.protocol
= IPPROTO_IPV6
;
2847 ifr
.ifr_ifru
.ifru_data
= (__force
void __user
*)&p
;
2849 if (ops
->ndo_do_ioctl
) {
2850 mm_segment_t oldfs
= get_fs();
2853 err
= ops
->ndo_do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
2860 dev
= __dev_get_by_name(net
, p
.name
);
2863 err
= dev_open(dev
, NULL
);
2873 static int ipv6_mc_config(struct sock
*sk
, bool join
,
2874 const struct in6_addr
*addr
, int ifindex
)
2882 ret
= ipv6_sock_mc_join(sk
, ifindex
, addr
);
2884 ret
= ipv6_sock_mc_drop(sk
, ifindex
, addr
);
2891 * Manual configuration of address on an interface
2893 static int inet6_addr_add(struct net
*net
, int ifindex
,
2894 struct ifa6_config
*cfg
,
2895 struct netlink_ext_ack
*extack
)
2897 struct inet6_ifaddr
*ifp
;
2898 struct inet6_dev
*idev
;
2899 struct net_device
*dev
;
2900 unsigned long timeout
;
2906 if (cfg
->plen
> 128)
2909 /* check the lifetime */
2910 if (!cfg
->valid_lft
|| cfg
->preferred_lft
> cfg
->valid_lft
)
2913 if (cfg
->ifa_flags
& IFA_F_MANAGETEMPADDR
&& cfg
->plen
!= 64)
2916 dev
= __dev_get_by_index(net
, ifindex
);
2920 idev
= addrconf_add_dev(dev
);
2922 return PTR_ERR(idev
);
2924 if (cfg
->ifa_flags
& IFA_F_MCAUTOJOIN
) {
2925 int ret
= ipv6_mc_config(net
->ipv6
.mc_autojoin_sk
,
2926 true, cfg
->pfx
, ifindex
);
2932 cfg
->scope
= ipv6_addr_scope(cfg
->pfx
);
2934 timeout
= addrconf_timeout_fixup(cfg
->valid_lft
, HZ
);
2935 if (addrconf_finite_timeout(timeout
)) {
2936 expires
= jiffies_to_clock_t(timeout
* HZ
);
2937 cfg
->valid_lft
= timeout
;
2938 flags
= RTF_EXPIRES
;
2942 cfg
->ifa_flags
|= IFA_F_PERMANENT
;
2945 timeout
= addrconf_timeout_fixup(cfg
->preferred_lft
, HZ
);
2946 if (addrconf_finite_timeout(timeout
)) {
2948 cfg
->ifa_flags
|= IFA_F_DEPRECATED
;
2949 cfg
->preferred_lft
= timeout
;
2952 ifp
= ipv6_add_addr(idev
, cfg
, true, extack
);
2954 if (!(cfg
->ifa_flags
& IFA_F_NOPREFIXROUTE
)) {
2955 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
,
2956 ifp
->rt_priority
, dev
, expires
,
2960 /* Send a netlink notification if DAD is enabled and
2961 * optimistic flag is not set
2963 if (!(ifp
->flags
& (IFA_F_OPTIMISTIC
| IFA_F_NODAD
)))
2964 ipv6_ifa_notify(0, ifp
);
2966 * Note that section 3.1 of RFC 4429 indicates
2967 * that the Optimistic flag should not be set for
2968 * manually configured addresses
2970 addrconf_dad_start(ifp
);
2971 if (cfg
->ifa_flags
& IFA_F_MANAGETEMPADDR
)
2972 manage_tempaddrs(idev
, ifp
, cfg
->valid_lft
,
2973 cfg
->preferred_lft
, true, jiffies
);
2975 addrconf_verify_rtnl();
2977 } else if (cfg
->ifa_flags
& IFA_F_MCAUTOJOIN
) {
2978 ipv6_mc_config(net
->ipv6
.mc_autojoin_sk
, false,
2982 return PTR_ERR(ifp
);
2985 static int inet6_addr_del(struct net
*net
, int ifindex
, u32 ifa_flags
,
2986 const struct in6_addr
*pfx
, unsigned int plen
)
2988 struct inet6_ifaddr
*ifp
;
2989 struct inet6_dev
*idev
;
2990 struct net_device
*dev
;
2995 dev
= __dev_get_by_index(net
, ifindex
);
2999 idev
= __in6_dev_get(dev
);
3003 read_lock_bh(&idev
->lock
);
3004 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
3005 if (ifp
->prefix_len
== plen
&&
3006 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
3008 read_unlock_bh(&idev
->lock
);
3010 if (!(ifp
->flags
& IFA_F_TEMPORARY
) &&
3011 (ifa_flags
& IFA_F_MANAGETEMPADDR
))
3012 manage_tempaddrs(idev
, ifp
, 0, 0, false,
3015 addrconf_verify_rtnl();
3016 if (ipv6_addr_is_multicast(pfx
)) {
3017 ipv6_mc_config(net
->ipv6
.mc_autojoin_sk
,
3018 false, pfx
, dev
->ifindex
);
3023 read_unlock_bh(&idev
->lock
);
3024 return -EADDRNOTAVAIL
;
3028 int addrconf_add_ifaddr(struct net
*net
, void __user
*arg
)
3030 struct ifa6_config cfg
= {
3031 .ifa_flags
= IFA_F_PERMANENT
,
3032 .preferred_lft
= INFINITY_LIFE_TIME
,
3033 .valid_lft
= INFINITY_LIFE_TIME
,
3035 struct in6_ifreq ireq
;
3038 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
3041 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
3044 cfg
.pfx
= &ireq
.ifr6_addr
;
3045 cfg
.plen
= ireq
.ifr6_prefixlen
;
3048 err
= inet6_addr_add(net
, ireq
.ifr6_ifindex
, &cfg
, NULL
);
3053 int addrconf_del_ifaddr(struct net
*net
, void __user
*arg
)
3055 struct in6_ifreq ireq
;
3058 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
3061 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
3065 err
= inet6_addr_del(net
, ireq
.ifr6_ifindex
, 0, &ireq
.ifr6_addr
,
3066 ireq
.ifr6_prefixlen
);
3071 static void add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
3072 int plen
, int scope
)
3074 struct inet6_ifaddr
*ifp
;
3075 struct ifa6_config cfg
= {
3078 .ifa_flags
= IFA_F_PERMANENT
,
3079 .valid_lft
= INFINITY_LIFE_TIME
,
3080 .preferred_lft
= INFINITY_LIFE_TIME
,
3084 ifp
= ipv6_add_addr(idev
, &cfg
, true, NULL
);
3086 spin_lock_bh(&ifp
->lock
);
3087 ifp
->flags
&= ~IFA_F_TENTATIVE
;
3088 spin_unlock_bh(&ifp
->lock
);
3089 rt_genid_bump_ipv6(dev_net(idev
->dev
));
3090 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
3095 #if IS_ENABLED(CONFIG_IPV6_SIT)
3096 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
3098 struct in6_addr addr
;
3099 struct net_device
*dev
;
3100 struct net
*net
= dev_net(idev
->dev
);
3106 memset(&addr
, 0, sizeof(struct in6_addr
));
3107 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
3109 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
3110 addr
.s6_addr32
[0] = htonl(0xfe800000);
3114 scope
= IPV6_ADDR_COMPATv4
;
3116 pflags
|= RTF_NONEXTHOP
;
3119 if (addr
.s6_addr32
[3]) {
3120 add_addr(idev
, &addr
, plen
, scope
);
3121 addrconf_prefix_route(&addr
, plen
, 0, idev
->dev
, 0, pflags
,
3126 for_each_netdev(net
, dev
) {
3127 struct in_device
*in_dev
= __in_dev_get_rtnl(dev
);
3128 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
3129 struct in_ifaddr
*ifa
;
3133 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
3135 addr
.s6_addr32
[3] = ifa
->ifa_local
;
3137 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
3139 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
3140 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
3145 add_addr(idev
, &addr
, plen
, flag
);
3146 addrconf_prefix_route(&addr
, plen
, 0, idev
->dev
,
3147 0, pflags
, GFP_KERNEL
);
3154 static void init_loopback(struct net_device
*dev
)
3156 struct inet6_dev
*idev
;
3162 idev
= ipv6_find_idev(dev
);
3164 pr_debug("%s: add_dev failed\n", __func__
);
3168 add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
);
3171 void addrconf_add_linklocal(struct inet6_dev
*idev
,
3172 const struct in6_addr
*addr
, u32 flags
)
3174 struct ifa6_config cfg
= {
3177 .ifa_flags
= flags
| IFA_F_PERMANENT
,
3178 .valid_lft
= INFINITY_LIFE_TIME
,
3179 .preferred_lft
= INFINITY_LIFE_TIME
,
3182 struct inet6_ifaddr
*ifp
;
3184 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3185 if ((dev_net(idev
->dev
)->ipv6
.devconf_all
->optimistic_dad
||
3186 idev
->cnf
.optimistic_dad
) &&
3187 !dev_net(idev
->dev
)->ipv6
.devconf_all
->forwarding
)
3188 cfg
.ifa_flags
|= IFA_F_OPTIMISTIC
;
3191 ifp
= ipv6_add_addr(idev
, &cfg
, true, NULL
);
3193 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, 0, idev
->dev
,
3195 addrconf_dad_start(ifp
);
3199 EXPORT_SYMBOL_GPL(addrconf_add_linklocal
);
3201 static bool ipv6_reserved_interfaceid(struct in6_addr address
)
3203 if ((address
.s6_addr32
[2] | address
.s6_addr32
[3]) == 0)
3206 if (address
.s6_addr32
[2] == htonl(0x02005eff) &&
3207 ((address
.s6_addr32
[3] & htonl(0xfe000000)) == htonl(0xfe000000)))
3210 if (address
.s6_addr32
[2] == htonl(0xfdffffff) &&
3211 ((address
.s6_addr32
[3] & htonl(0xffffff80)) == htonl(0xffffff80)))
3217 static int ipv6_generate_stable_address(struct in6_addr
*address
,
3219 const struct inet6_dev
*idev
)
3221 static DEFINE_SPINLOCK(lock
);
3222 static __u32 digest
[SHA_DIGEST_WORDS
];
3223 static __u32 workspace
[SHA_WORKSPACE_WORDS
];
3226 char __data
[SHA_MESSAGE_BYTES
];
3228 struct in6_addr secret
;
3230 unsigned char hwaddr
[MAX_ADDR_LEN
];
3235 struct in6_addr secret
;
3236 struct in6_addr temp
;
3237 struct net
*net
= dev_net(idev
->dev
);
3239 BUILD_BUG_ON(sizeof(data
.__data
) != sizeof(data
));
3241 if (idev
->cnf
.stable_secret
.initialized
)
3242 secret
= idev
->cnf
.stable_secret
.secret
;
3243 else if (net
->ipv6
.devconf_dflt
->stable_secret
.initialized
)
3244 secret
= net
->ipv6
.devconf_dflt
->stable_secret
.secret
;
3249 spin_lock_bh(&lock
);
3252 memset(&data
, 0, sizeof(data
));
3253 memset(workspace
, 0, sizeof(workspace
));
3254 memcpy(data
.hwaddr
, idev
->dev
->perm_addr
, idev
->dev
->addr_len
);
3255 data
.prefix
[0] = address
->s6_addr32
[0];
3256 data
.prefix
[1] = address
->s6_addr32
[1];
3257 data
.secret
= secret
;
3258 data
.dad_count
= dad_count
;
3260 sha_transform(digest
, data
.__data
, workspace
);
3263 temp
.s6_addr32
[2] = (__force __be32
)digest
[0];
3264 temp
.s6_addr32
[3] = (__force __be32
)digest
[1];
3266 spin_unlock_bh(&lock
);
3268 if (ipv6_reserved_interfaceid(temp
)) {
3270 if (dad_count
> dev_net(idev
->dev
)->ipv6
.sysctl
.idgen_retries
)
3279 static void ipv6_gen_mode_random_init(struct inet6_dev
*idev
)
3281 struct ipv6_stable_secret
*s
= &idev
->cnf
.stable_secret
;
3285 s
= &idev
->cnf
.stable_secret
;
3286 get_random_bytes(&s
->secret
, sizeof(s
->secret
));
3287 s
->initialized
= true;
3290 static void addrconf_addr_gen(struct inet6_dev
*idev
, bool prefix_route
)
3292 struct in6_addr addr
;
3294 /* no link local addresses on L3 master devices */
3295 if (netif_is_l3_master(idev
->dev
))
3298 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
3300 switch (idev
->cnf
.addr_gen_mode
) {
3301 case IN6_ADDR_GEN_MODE_RANDOM
:
3302 ipv6_gen_mode_random_init(idev
);
3304 case IN6_ADDR_GEN_MODE_STABLE_PRIVACY
:
3305 if (!ipv6_generate_stable_address(&addr
, 0, idev
))
3306 addrconf_add_linklocal(idev
, &addr
,
3307 IFA_F_STABLE_PRIVACY
);
3308 else if (prefix_route
)
3309 addrconf_prefix_route(&addr
, 64, 0, idev
->dev
,
3312 case IN6_ADDR_GEN_MODE_EUI64
:
3313 /* addrconf_add_linklocal also adds a prefix_route and we
3314 * only need to care about prefix routes if ipv6_generate_eui64
3315 * couldn't generate one.
3317 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) == 0)
3318 addrconf_add_linklocal(idev
, &addr
, 0);
3319 else if (prefix_route
)
3320 addrconf_prefix_route(&addr
, 64, 0, idev
->dev
,
3323 case IN6_ADDR_GEN_MODE_NONE
:
3325 /* will not add any link local address */
3330 static void addrconf_dev_config(struct net_device
*dev
)
3332 struct inet6_dev
*idev
;
3336 if ((dev
->type
!= ARPHRD_ETHER
) &&
3337 (dev
->type
!= ARPHRD_FDDI
) &&
3338 (dev
->type
!= ARPHRD_ARCNET
) &&
3339 (dev
->type
!= ARPHRD_INFINIBAND
) &&
3340 (dev
->type
!= ARPHRD_IEEE1394
) &&
3341 (dev
->type
!= ARPHRD_TUNNEL6
) &&
3342 (dev
->type
!= ARPHRD_6LOWPAN
) &&
3343 (dev
->type
!= ARPHRD_IP6GRE
) &&
3344 (dev
->type
!= ARPHRD_IPGRE
) &&
3345 (dev
->type
!= ARPHRD_TUNNEL
) &&
3346 (dev
->type
!= ARPHRD_NONE
) &&
3347 (dev
->type
!= ARPHRD_RAWIP
)) {
3348 /* Alas, we support only Ethernet autoconfiguration. */
3352 idev
= addrconf_add_dev(dev
);
3356 /* this device type has no EUI support */
3357 if (dev
->type
== ARPHRD_NONE
&&
3358 idev
->cnf
.addr_gen_mode
== IN6_ADDR_GEN_MODE_EUI64
)
3359 idev
->cnf
.addr_gen_mode
= IN6_ADDR_GEN_MODE_RANDOM
;
3361 addrconf_addr_gen(idev
, false);
3364 #if IS_ENABLED(CONFIG_IPV6_SIT)
3365 static void addrconf_sit_config(struct net_device
*dev
)
3367 struct inet6_dev
*idev
;
3372 * Configure the tunnel with one of our IPv4
3373 * addresses... we should configure all of
3374 * our v4 addrs in the tunnel
3377 idev
= ipv6_find_idev(dev
);
3379 pr_debug("%s: add_dev failed\n", __func__
);
3383 if (dev
->priv_flags
& IFF_ISATAP
) {
3384 addrconf_addr_gen(idev
, false);
3388 sit_add_v4_addrs(idev
);
3390 if (dev
->flags
&IFF_POINTOPOINT
)
3391 addrconf_add_mroute(dev
);
3395 #if IS_ENABLED(CONFIG_NET_IPGRE)
3396 static void addrconf_gre_config(struct net_device
*dev
)
3398 struct inet6_dev
*idev
;
3402 idev
= ipv6_find_idev(dev
);
3404 pr_debug("%s: add_dev failed\n", __func__
);
3408 addrconf_addr_gen(idev
, true);
3409 if (dev
->flags
& IFF_POINTOPOINT
)
3410 addrconf_add_mroute(dev
);
3414 static int fixup_permanent_addr(struct net
*net
,
3415 struct inet6_dev
*idev
,
3416 struct inet6_ifaddr
*ifp
)
3418 /* !fib6_node means the host route was removed from the
3419 * FIB, for example, if 'lo' device is taken down. In that
3420 * case regenerate the host route.
3422 if (!ifp
->rt
|| !ifp
->rt
->fib6_node
) {
3423 struct fib6_info
*f6i
, *prev
;
3425 f6i
= addrconf_f6i_alloc(net
, idev
, &ifp
->addr
, false,
3428 return PTR_ERR(f6i
);
3430 /* ifp->rt can be accessed outside of rtnl */
3431 spin_lock(&ifp
->lock
);
3434 spin_unlock(&ifp
->lock
);
3436 fib6_info_release(prev
);
3439 if (!(ifp
->flags
& IFA_F_NOPREFIXROUTE
)) {
3440 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
,
3441 ifp
->rt_priority
, idev
->dev
, 0, 0,
3445 if (ifp
->state
== INET6_IFADDR_STATE_PREDAD
)
3446 addrconf_dad_start(ifp
);
3451 static void addrconf_permanent_addr(struct net
*net
, struct net_device
*dev
)
3453 struct inet6_ifaddr
*ifp
, *tmp
;
3454 struct inet6_dev
*idev
;
3456 idev
= __in6_dev_get(dev
);
3460 write_lock_bh(&idev
->lock
);
3462 list_for_each_entry_safe(ifp
, tmp
, &idev
->addr_list
, if_list
) {
3463 if ((ifp
->flags
& IFA_F_PERMANENT
) &&
3464 fixup_permanent_addr(net
, idev
, ifp
) < 0) {
3465 write_unlock_bh(&idev
->lock
);
3468 write_lock_bh(&idev
->lock
);
3470 net_info_ratelimited("%s: Failed to add prefix route for address %pI6c; dropping\n",
3471 idev
->dev
->name
, &ifp
->addr
);
3475 write_unlock_bh(&idev
->lock
);
3478 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
3481 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
3482 struct netdev_notifier_change_info
*change_info
;
3483 struct netdev_notifier_changeupper_info
*info
;
3484 struct inet6_dev
*idev
= __in6_dev_get(dev
);
3485 struct net
*net
= dev_net(dev
);
3486 int run_pending
= 0;
3490 case NETDEV_REGISTER
:
3491 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
3492 idev
= ipv6_add_dev(dev
);
3494 return notifier_from_errno(PTR_ERR(idev
));
3498 case NETDEV_CHANGEMTU
:
3499 /* if MTU under IPV6_MIN_MTU stop IPv6 on this interface. */
3500 if (dev
->mtu
< IPV6_MIN_MTU
) {
3501 addrconf_ifdown(dev
, dev
!= net
->loopback_dev
);
3506 rt6_mtu_change(dev
, dev
->mtu
);
3507 idev
->cnf
.mtu6
= dev
->mtu
;
3511 /* allocate new idev */
3512 idev
= ipv6_add_dev(dev
);
3516 /* device is still not ready */
3517 if (!(idev
->if_flags
& IF_READY
))
3526 if (dev
->flags
& IFF_SLAVE
)
3529 if (idev
&& idev
->cnf
.disable_ipv6
)
3532 if (event
== NETDEV_UP
) {
3533 /* restore routes for permanent addresses */
3534 addrconf_permanent_addr(net
, dev
);
3536 if (!addrconf_link_ready(dev
)) {
3537 /* device is not ready yet. */
3538 pr_debug("ADDRCONF(NETDEV_UP): %s: link is not ready\n",
3543 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
3544 idev
= ipv6_add_dev(dev
);
3546 if (!IS_ERR_OR_NULL(idev
)) {
3547 idev
->if_flags
|= IF_READY
;
3550 } else if (event
== NETDEV_CHANGE
) {
3551 if (!addrconf_link_ready(dev
)) {
3552 /* device is still not ready. */
3553 rt6_sync_down_dev(dev
, event
);
3557 if (!IS_ERR_OR_NULL(idev
)) {
3558 if (idev
->if_flags
& IF_READY
) {
3559 /* device is already configured -
3560 * but resend MLD reports, we might
3561 * have roamed and need to update
3562 * multicast snooping switches
3566 if (change_info
->flags_changed
& IFF_NOARP
)
3567 addrconf_dad_run(idev
, true);
3568 rt6_sync_up(dev
, RTNH_F_LINKDOWN
);
3571 idev
->if_flags
|= IF_READY
;
3574 pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n",
3580 switch (dev
->type
) {
3581 #if IS_ENABLED(CONFIG_IPV6_SIT)
3583 addrconf_sit_config(dev
);
3586 #if IS_ENABLED(CONFIG_NET_IPGRE)
3588 addrconf_gre_config(dev
);
3591 case ARPHRD_LOOPBACK
:
3596 addrconf_dev_config(dev
);
3600 if (!IS_ERR_OR_NULL(idev
)) {
3602 addrconf_dad_run(idev
, false);
3604 /* Device has an address by now */
3605 rt6_sync_up(dev
, RTNH_F_DEAD
);
3608 * If the MTU changed during the interface down,
3609 * when the interface up, the changed MTU must be
3610 * reflected in the idev as well as routers.
3612 if (idev
->cnf
.mtu6
!= dev
->mtu
&&
3613 dev
->mtu
>= IPV6_MIN_MTU
) {
3614 rt6_mtu_change(dev
, dev
->mtu
);
3615 idev
->cnf
.mtu6
= dev
->mtu
;
3617 idev
->tstamp
= jiffies
;
3618 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
3621 * If the changed mtu during down is lower than
3622 * IPV6_MIN_MTU stop IPv6 on this interface.
3624 if (dev
->mtu
< IPV6_MIN_MTU
)
3625 addrconf_ifdown(dev
, dev
!= net
->loopback_dev
);
3630 case NETDEV_UNREGISTER
:
3632 * Remove all addresses from this interface.
3634 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
3637 case NETDEV_CHANGENAME
:
3639 snmp6_unregister_dev(idev
);
3640 addrconf_sysctl_unregister(idev
);
3641 err
= addrconf_sysctl_register(idev
);
3643 return notifier_from_errno(err
);
3644 err
= snmp6_register_dev(idev
);
3646 addrconf_sysctl_unregister(idev
);
3647 return notifier_from_errno(err
);
3652 case NETDEV_PRE_TYPE_CHANGE
:
3653 case NETDEV_POST_TYPE_CHANGE
:
3655 addrconf_type_change(dev
, event
);
3658 case NETDEV_CHANGEUPPER
:
3661 /* flush all routes if dev is linked to or unlinked from
3662 * an L3 master device (e.g., VRF)
3664 if (info
->upper_dev
&& netif_is_l3_master(info
->upper_dev
))
3665 addrconf_ifdown(dev
, 0);
3672 * addrconf module should be notified of a device going up
3674 static struct notifier_block ipv6_dev_notf
= {
3675 .notifier_call
= addrconf_notify
,
3676 .priority
= ADDRCONF_NOTIFY_PRIORITY
,
3679 static void addrconf_type_change(struct net_device
*dev
, unsigned long event
)
3681 struct inet6_dev
*idev
;
3684 idev
= __in6_dev_get(dev
);
3686 if (event
== NETDEV_POST_TYPE_CHANGE
)
3687 ipv6_mc_remap(idev
);
3688 else if (event
== NETDEV_PRE_TYPE_CHANGE
)
3689 ipv6_mc_unmap(idev
);
3692 static bool addr_is_local(const struct in6_addr
*addr
)
3694 return ipv6_addr_type(addr
) &
3695 (IPV6_ADDR_LINKLOCAL
| IPV6_ADDR_LOOPBACK
);
3698 static int addrconf_ifdown(struct net_device
*dev
, int how
)
3700 unsigned long event
= how
? NETDEV_UNREGISTER
: NETDEV_DOWN
;
3701 struct net
*net
= dev_net(dev
);
3702 struct inet6_dev
*idev
;
3703 struct inet6_ifaddr
*ifa
, *tmp
;
3704 bool keep_addr
= false;
3709 rt6_disable_ip(dev
, event
);
3711 idev
= __in6_dev_get(dev
);
3716 * Step 1: remove reference to ipv6 device from parent device.
3722 /* protected by rtnl_lock */
3723 RCU_INIT_POINTER(dev
->ip6_ptr
, NULL
);
3725 /* Step 1.5: remove snmp6 entry */
3726 snmp6_unregister_dev(idev
);
3730 /* combine the user config with event to determine if permanent
3731 * addresses are to be removed from address hash table
3733 if (!how
&& !idev
->cnf
.disable_ipv6
) {
3734 /* aggregate the system setting and interface setting */
3735 int _keep_addr
= net
->ipv6
.devconf_all
->keep_addr_on_down
;
3738 _keep_addr
= idev
->cnf
.keep_addr_on_down
;
3740 keep_addr
= (_keep_addr
> 0);
3743 /* Step 2: clear hash table */
3744 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
3745 struct hlist_head
*h
= &inet6_addr_lst
[i
];
3747 spin_lock_bh(&addrconf_hash_lock
);
3749 hlist_for_each_entry_rcu(ifa
, h
, addr_lst
) {
3750 if (ifa
->idev
== idev
) {
3751 addrconf_del_dad_work(ifa
);
3752 /* combined flag + permanent flag decide if
3753 * address is retained on a down event
3756 !(ifa
->flags
& IFA_F_PERMANENT
) ||
3757 addr_is_local(&ifa
->addr
)) {
3758 hlist_del_init_rcu(&ifa
->addr_lst
);
3763 spin_unlock_bh(&addrconf_hash_lock
);
3766 write_lock_bh(&idev
->lock
);
3768 addrconf_del_rs_timer(idev
);
3770 /* Step 2: clear flags for stateless addrconf */
3772 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
3774 /* Step 3: clear tempaddr list */
3775 while (!list_empty(&idev
->tempaddr_list
)) {
3776 ifa
= list_first_entry(&idev
->tempaddr_list
,
3777 struct inet6_ifaddr
, tmp_list
);
3778 list_del(&ifa
->tmp_list
);
3779 write_unlock_bh(&idev
->lock
);
3780 spin_lock_bh(&ifa
->lock
);
3783 in6_ifa_put(ifa
->ifpub
);
3786 spin_unlock_bh(&ifa
->lock
);
3788 write_lock_bh(&idev
->lock
);
3791 list_for_each_entry_safe(ifa
, tmp
, &idev
->addr_list
, if_list
) {
3792 struct fib6_info
*rt
= NULL
;
3795 addrconf_del_dad_work(ifa
);
3797 keep
= keep_addr
&& (ifa
->flags
& IFA_F_PERMANENT
) &&
3798 !addr_is_local(&ifa
->addr
);
3800 write_unlock_bh(&idev
->lock
);
3801 spin_lock_bh(&ifa
->lock
);
3804 /* set state to skip the notifier below */
3805 state
= INET6_IFADDR_STATE_DEAD
;
3806 ifa
->state
= INET6_IFADDR_STATE_PREDAD
;
3807 if (!(ifa
->flags
& IFA_F_NODAD
))
3808 ifa
->flags
|= IFA_F_TENTATIVE
;
3814 ifa
->state
= INET6_IFADDR_STATE_DEAD
;
3817 spin_unlock_bh(&ifa
->lock
);
3820 ip6_del_rt(net
, rt
);
3822 if (state
!= INET6_IFADDR_STATE_DEAD
) {
3823 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
3824 inet6addr_notifier_call_chain(NETDEV_DOWN
, ifa
);
3826 if (idev
->cnf
.forwarding
)
3827 addrconf_leave_anycast(ifa
);
3828 addrconf_leave_solict(ifa
->idev
, &ifa
->addr
);
3831 write_lock_bh(&idev
->lock
);
3833 list_del_rcu(&ifa
->if_list
);
3838 write_unlock_bh(&idev
->lock
);
3840 /* Step 5: Discard anycast and multicast list */
3842 ipv6_ac_destroy_dev(idev
);
3843 ipv6_mc_destroy_dev(idev
);
3848 idev
->tstamp
= jiffies
;
3850 /* Last: Shot the device (if unregistered) */
3852 addrconf_sysctl_unregister(idev
);
3853 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
3854 neigh_ifdown(&nd_tbl
, dev
);
3860 static void addrconf_rs_timer(struct timer_list
*t
)
3862 struct inet6_dev
*idev
= from_timer(idev
, t
, rs_timer
);
3863 struct net_device
*dev
= idev
->dev
;
3864 struct in6_addr lladdr
;
3866 write_lock(&idev
->lock
);
3867 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
))
3870 if (!ipv6_accept_ra(idev
))
3873 /* Announcement received after solicitation was sent */
3874 if (idev
->if_flags
& IF_RA_RCVD
)
3877 if (idev
->rs_probes
++ < idev
->cnf
.rtr_solicits
|| idev
->cnf
.rtr_solicits
< 0) {
3878 write_unlock(&idev
->lock
);
3879 if (!ipv6_get_lladdr(dev
, &lladdr
, IFA_F_TENTATIVE
))
3880 ndisc_send_rs(dev
, &lladdr
,
3881 &in6addr_linklocal_allrouters
);
3885 write_lock(&idev
->lock
);
3886 idev
->rs_interval
= rfc3315_s14_backoff_update(
3887 idev
->rs_interval
, idev
->cnf
.rtr_solicit_max_interval
);
3888 /* The wait after the last probe can be shorter */
3889 addrconf_mod_rs_timer(idev
, (idev
->rs_probes
==
3890 idev
->cnf
.rtr_solicits
) ?
3891 idev
->cnf
.rtr_solicit_delay
:
3895 * Note: we do not support deprecated "all on-link"
3896 * assumption any longer.
3898 pr_debug("%s: no IPv6 routers present\n", idev
->dev
->name
);
3902 write_unlock(&idev
->lock
);
3908 * Duplicate Address Detection
3910 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
3912 unsigned long rand_num
;
3913 struct inet6_dev
*idev
= ifp
->idev
;
3916 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
3919 rand_num
= prandom_u32() % (idev
->cnf
.rtr_solicit_delay
? : 1);
3922 if (idev
->cnf
.enhanced_dad
||
3923 dev_net(idev
->dev
)->ipv6
.devconf_all
->enhanced_dad
) {
3925 get_random_bytes(&nonce
, 6);
3928 ifp
->dad_nonce
= nonce
;
3929 ifp
->dad_probes
= idev
->cnf
.dad_transmits
;
3930 addrconf_mod_dad_work(ifp
, rand_num
);
3933 static void addrconf_dad_begin(struct inet6_ifaddr
*ifp
)
3935 struct inet6_dev
*idev
= ifp
->idev
;
3936 struct net_device
*dev
= idev
->dev
;
3937 bool bump_id
, notify
= false;
3940 addrconf_join_solict(dev
, &ifp
->addr
);
3942 prandom_seed((__force u32
) ifp
->addr
.s6_addr32
[3]);
3944 read_lock_bh(&idev
->lock
);
3945 spin_lock(&ifp
->lock
);
3946 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
)
3950 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
3951 (net
->ipv6
.devconf_all
->accept_dad
< 1 &&
3952 idev
->cnf
.accept_dad
< 1) ||
3953 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
3954 ifp
->flags
& IFA_F_NODAD
) {
3955 bool send_na
= false;
3957 if (ifp
->flags
& IFA_F_TENTATIVE
&&
3958 !(ifp
->flags
& IFA_F_OPTIMISTIC
))
3960 bump_id
= ifp
->flags
& IFA_F_TENTATIVE
;
3961 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3962 spin_unlock(&ifp
->lock
);
3963 read_unlock_bh(&idev
->lock
);
3965 addrconf_dad_completed(ifp
, bump_id
, send_na
);
3969 if (!(idev
->if_flags
& IF_READY
)) {
3970 spin_unlock(&ifp
->lock
);
3971 read_unlock_bh(&idev
->lock
);
3973 * If the device is not ready:
3974 * - keep it tentative if it is a permanent address.
3975 * - otherwise, kill it.
3978 addrconf_dad_stop(ifp
, 0);
3983 * Optimistic nodes can start receiving
3986 if (ifp
->flags
& IFA_F_OPTIMISTIC
) {
3987 ip6_ins_rt(net
, ifp
->rt
);
3988 if (ipv6_use_optimistic_addr(net
, idev
)) {
3989 /* Because optimistic nodes can use this address,
3990 * notify listeners. If DAD fails, RTM_DELADDR is sent.
3996 addrconf_dad_kick(ifp
);
3998 spin_unlock(&ifp
->lock
);
3999 read_unlock_bh(&idev
->lock
);
4001 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
4004 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
)
4006 bool begin_dad
= false;
4008 spin_lock_bh(&ifp
->lock
);
4009 if (ifp
->state
!= INET6_IFADDR_STATE_DEAD
) {
4010 ifp
->state
= INET6_IFADDR_STATE_PREDAD
;
4013 spin_unlock_bh(&ifp
->lock
);
4016 addrconf_mod_dad_work(ifp
, 0);
4019 static void addrconf_dad_work(struct work_struct
*w
)
4021 struct inet6_ifaddr
*ifp
= container_of(to_delayed_work(w
),
4022 struct inet6_ifaddr
,
4024 struct inet6_dev
*idev
= ifp
->idev
;
4025 bool bump_id
, disable_ipv6
= false;
4026 struct in6_addr mcaddr
;
4032 } action
= DAD_PROCESS
;
4036 spin_lock_bh(&ifp
->lock
);
4037 if (ifp
->state
== INET6_IFADDR_STATE_PREDAD
) {
4039 ifp
->state
= INET6_IFADDR_STATE_DAD
;
4040 } else if (ifp
->state
== INET6_IFADDR_STATE_ERRDAD
) {
4042 ifp
->state
= INET6_IFADDR_STATE_POSTDAD
;
4044 if ((dev_net(idev
->dev
)->ipv6
.devconf_all
->accept_dad
> 1 ||
4045 idev
->cnf
.accept_dad
> 1) &&
4046 !idev
->cnf
.disable_ipv6
&&
4047 !(ifp
->flags
& IFA_F_STABLE_PRIVACY
)) {
4048 struct in6_addr addr
;
4050 addr
.s6_addr32
[0] = htonl(0xfe800000);
4051 addr
.s6_addr32
[1] = 0;
4053 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) &&
4054 ipv6_addr_equal(&ifp
->addr
, &addr
)) {
4055 /* DAD failed for link-local based on MAC */
4056 idev
->cnf
.disable_ipv6
= 1;
4058 pr_info("%s: IPv6 being disabled!\n",
4059 ifp
->idev
->dev
->name
);
4060 disable_ipv6
= true;
4064 spin_unlock_bh(&ifp
->lock
);
4066 if (action
== DAD_BEGIN
) {
4067 addrconf_dad_begin(ifp
);
4069 } else if (action
== DAD_ABORT
) {
4071 addrconf_dad_stop(ifp
, 1);
4073 addrconf_ifdown(idev
->dev
, 0);
4077 if (!ifp
->dad_probes
&& addrconf_dad_end(ifp
))
4080 write_lock_bh(&idev
->lock
);
4081 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
)) {
4082 write_unlock_bh(&idev
->lock
);
4086 spin_lock(&ifp
->lock
);
4087 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
) {
4088 spin_unlock(&ifp
->lock
);
4089 write_unlock_bh(&idev
->lock
);
4093 if (ifp
->dad_probes
== 0) {
4094 bool send_na
= false;
4097 * DAD was successful
4100 if (ifp
->flags
& IFA_F_TENTATIVE
&&
4101 !(ifp
->flags
& IFA_F_OPTIMISTIC
))
4103 bump_id
= ifp
->flags
& IFA_F_TENTATIVE
;
4104 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
4105 spin_unlock(&ifp
->lock
);
4106 write_unlock_bh(&idev
->lock
);
4108 addrconf_dad_completed(ifp
, bump_id
, send_na
);
4114 addrconf_mod_dad_work(ifp
,
4115 NEIGH_VAR(ifp
->idev
->nd_parms
, RETRANS_TIME
));
4116 spin_unlock(&ifp
->lock
);
4117 write_unlock_bh(&idev
->lock
);
4119 /* send a neighbour solicitation for our addr */
4120 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
4121 ndisc_send_ns(ifp
->idev
->dev
, &ifp
->addr
, &mcaddr
, &in6addr_any
,
4128 /* ifp->idev must be at least read locked */
4129 static bool ipv6_lonely_lladdr(struct inet6_ifaddr
*ifp
)
4131 struct inet6_ifaddr
*ifpiter
;
4132 struct inet6_dev
*idev
= ifp
->idev
;
4134 list_for_each_entry_reverse(ifpiter
, &idev
->addr_list
, if_list
) {
4135 if (ifpiter
->scope
> IFA_LINK
)
4137 if (ifp
!= ifpiter
&& ifpiter
->scope
== IFA_LINK
&&
4138 (ifpiter
->flags
& (IFA_F_PERMANENT
|IFA_F_TENTATIVE
|
4139 IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
)) ==
4146 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
, bool bump_id
,
4149 struct net_device
*dev
= ifp
->idev
->dev
;
4150 struct in6_addr lladdr
;
4151 bool send_rs
, send_mld
;
4153 addrconf_del_dad_work(ifp
);
4156 * Configure the address for reception. Now it is valid.
4159 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
4161 /* If added prefix is link local and we are prepared to process
4162 router advertisements, start sending router solicitations.
4165 read_lock_bh(&ifp
->idev
->lock
);
4166 send_mld
= ifp
->scope
== IFA_LINK
&& ipv6_lonely_lladdr(ifp
);
4167 send_rs
= send_mld
&&
4168 ipv6_accept_ra(ifp
->idev
) &&
4169 ifp
->idev
->cnf
.rtr_solicits
!= 0 &&
4170 (dev
->flags
&IFF_LOOPBACK
) == 0;
4171 read_unlock_bh(&ifp
->idev
->lock
);
4173 /* While dad is in progress mld report's source address is in6_addrany.
4174 * Resend with proper ll now.
4177 ipv6_mc_dad_complete(ifp
->idev
);
4179 /* send unsolicited NA if enabled */
4181 (ifp
->idev
->cnf
.ndisc_notify
||
4182 dev_net(dev
)->ipv6
.devconf_all
->ndisc_notify
)) {
4183 ndisc_send_na(dev
, &in6addr_linklocal_allnodes
, &ifp
->addr
,
4184 /*router=*/ !!ifp
->idev
->cnf
.forwarding
,
4185 /*solicited=*/ false, /*override=*/ true,
4191 * If a host as already performed a random delay
4192 * [...] as part of DAD [...] there is no need
4193 * to delay again before sending the first RS
4195 if (ipv6_get_lladdr(dev
, &lladdr
, IFA_F_TENTATIVE
))
4197 ndisc_send_rs(dev
, &lladdr
, &in6addr_linklocal_allrouters
);
4199 write_lock_bh(&ifp
->idev
->lock
);
4200 spin_lock(&ifp
->lock
);
4201 ifp
->idev
->rs_interval
= rfc3315_s14_backoff_init(
4202 ifp
->idev
->cnf
.rtr_solicit_interval
);
4203 ifp
->idev
->rs_probes
= 1;
4204 ifp
->idev
->if_flags
|= IF_RS_SENT
;
4205 addrconf_mod_rs_timer(ifp
->idev
, ifp
->idev
->rs_interval
);
4206 spin_unlock(&ifp
->lock
);
4207 write_unlock_bh(&ifp
->idev
->lock
);
4211 rt_genid_bump_ipv6(dev_net(dev
));
4213 /* Make sure that a new temporary address will be created
4214 * before this temporary address becomes deprecated.
4216 if (ifp
->flags
& IFA_F_TEMPORARY
)
4217 addrconf_verify_rtnl();
4220 static void addrconf_dad_run(struct inet6_dev
*idev
, bool restart
)
4222 struct inet6_ifaddr
*ifp
;
4224 read_lock_bh(&idev
->lock
);
4225 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
4226 spin_lock(&ifp
->lock
);
4227 if ((ifp
->flags
& IFA_F_TENTATIVE
&&
4228 ifp
->state
== INET6_IFADDR_STATE_DAD
) || restart
) {
4230 ifp
->state
= INET6_IFADDR_STATE_PREDAD
;
4231 addrconf_dad_kick(ifp
);
4233 spin_unlock(&ifp
->lock
);
4235 read_unlock_bh(&idev
->lock
);
4238 #ifdef CONFIG_PROC_FS
4239 struct if6_iter_state
{
4240 struct seq_net_private p
;
4245 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
, loff_t pos
)
4247 struct if6_iter_state
*state
= seq
->private;
4248 struct net
*net
= seq_file_net(seq
);
4249 struct inet6_ifaddr
*ifa
= NULL
;
4252 /* initial bucket if pos is 0 */
4258 for (; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
4259 hlist_for_each_entry_rcu(ifa
, &inet6_addr_lst
[state
->bucket
],
4261 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
4263 /* sync with offset */
4264 if (p
< state
->offset
) {
4271 /* prepare for next bucket */
4278 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
,
4279 struct inet6_ifaddr
*ifa
)
4281 struct if6_iter_state
*state
= seq
->private;
4282 struct net
*net
= seq_file_net(seq
);
4284 hlist_for_each_entry_continue_rcu(ifa
, addr_lst
) {
4285 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
4292 while (++state
->bucket
< IN6_ADDR_HSIZE
) {
4293 hlist_for_each_entry_rcu(ifa
,
4294 &inet6_addr_lst
[state
->bucket
], addr_lst
) {
4295 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
4304 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
4308 return if6_get_first(seq
, *pos
);
4311 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
4313 struct inet6_ifaddr
*ifa
;
4315 ifa
= if6_get_next(seq
, v
);
4320 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
4326 static int if6_seq_show(struct seq_file
*seq
, void *v
)
4328 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
4329 seq_printf(seq
, "%pi6 %02x %02x %02x %02x %8s\n",
4331 ifp
->idev
->dev
->ifindex
,
4335 ifp
->idev
->dev
->name
);
4339 static const struct seq_operations if6_seq_ops
= {
4340 .start
= if6_seq_start
,
4341 .next
= if6_seq_next
,
4342 .show
= if6_seq_show
,
4343 .stop
= if6_seq_stop
,
4346 static int __net_init
if6_proc_net_init(struct net
*net
)
4348 if (!proc_create_net("if_inet6", 0444, net
->proc_net
, &if6_seq_ops
,
4349 sizeof(struct if6_iter_state
)))
4354 static void __net_exit
if6_proc_net_exit(struct net
*net
)
4356 remove_proc_entry("if_inet6", net
->proc_net
);
4359 static struct pernet_operations if6_proc_net_ops
= {
4360 .init
= if6_proc_net_init
,
4361 .exit
= if6_proc_net_exit
,
4364 int __init
if6_proc_init(void)
4366 return register_pernet_subsys(&if6_proc_net_ops
);
4369 void if6_proc_exit(void)
4371 unregister_pernet_subsys(&if6_proc_net_ops
);
4373 #endif /* CONFIG_PROC_FS */
4375 #if IS_ENABLED(CONFIG_IPV6_MIP6)
4376 /* Check if address is a home address configured on any interface. */
4377 int ipv6_chk_home_addr(struct net
*net
, const struct in6_addr
*addr
)
4379 unsigned int hash
= inet6_addr_hash(net
, addr
);
4380 struct inet6_ifaddr
*ifp
= NULL
;
4384 hlist_for_each_entry_rcu(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
4385 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
4387 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
4388 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
4399 * Periodic address status verification
4402 static void addrconf_verify_rtnl(void)
4404 unsigned long now
, next
, next_sec
, next_sched
;
4405 struct inet6_ifaddr
*ifp
;
4412 next
= round_jiffies_up(now
+ ADDR_CHECK_FREQUENCY
);
4414 cancel_delayed_work(&addr_chk_work
);
4416 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
4418 hlist_for_each_entry_rcu_bh(ifp
, &inet6_addr_lst
[i
], addr_lst
) {
4421 /* When setting preferred_lft to a value not zero or
4422 * infinity, while valid_lft is infinity
4423 * IFA_F_PERMANENT has a non-infinity life time.
4425 if ((ifp
->flags
& IFA_F_PERMANENT
) &&
4426 (ifp
->prefered_lft
== INFINITY_LIFE_TIME
))
4429 spin_lock(&ifp
->lock
);
4430 /* We try to batch several events at once. */
4431 age
= (now
- ifp
->tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
4433 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
4434 age
>= ifp
->valid_lft
) {
4435 spin_unlock(&ifp
->lock
);
4439 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
4440 spin_unlock(&ifp
->lock
);
4442 } else if (age
>= ifp
->prefered_lft
) {
4443 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
4446 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
4448 ifp
->flags
|= IFA_F_DEPRECATED
;
4451 if ((ifp
->valid_lft
!= INFINITY_LIFE_TIME
) &&
4452 (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
)))
4453 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
4455 spin_unlock(&ifp
->lock
);
4460 ipv6_ifa_notify(0, ifp
);
4464 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
4465 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
4466 unsigned long regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
4467 ifp
->idev
->cnf
.dad_transmits
*
4468 NEIGH_VAR(ifp
->idev
->nd_parms
, RETRANS_TIME
) / HZ
;
4470 if (age
>= ifp
->prefered_lft
- regen_advance
) {
4471 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
4472 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
4473 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
4474 if (!ifp
->regen_count
&& ifpub
) {
4477 in6_ifa_hold(ifpub
);
4478 spin_unlock(&ifp
->lock
);
4480 spin_lock(&ifpub
->lock
);
4481 ifpub
->regen_count
= 0;
4482 spin_unlock(&ifpub
->lock
);
4483 rcu_read_unlock_bh();
4484 ipv6_create_tempaddr(ifpub
, ifp
, true);
4490 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
4491 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
4492 spin_unlock(&ifp
->lock
);
4494 /* ifp->prefered_lft <= ifp->valid_lft */
4495 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
4496 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
4497 spin_unlock(&ifp
->lock
);
4502 next_sec
= round_jiffies_up(next
);
4505 /* If rounded timeout is accurate enough, accept it. */
4506 if (time_before(next_sec
, next
+ ADDRCONF_TIMER_FUZZ
))
4507 next_sched
= next_sec
;
4509 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
4510 if (time_before(next_sched
, jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
))
4511 next_sched
= jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
;
4513 pr_debug("now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
4514 now
, next
, next_sec
, next_sched
);
4515 mod_delayed_work(addrconf_wq
, &addr_chk_work
, next_sched
- now
);
4516 rcu_read_unlock_bh();
4519 static void addrconf_verify_work(struct work_struct
*w
)
4522 addrconf_verify_rtnl();
4526 static void addrconf_verify(void)
4528 mod_delayed_work(addrconf_wq
, &addr_chk_work
, 0);
4531 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
,
4532 struct in6_addr
**peer_pfx
)
4534 struct in6_addr
*pfx
= NULL
;
4539 pfx
= nla_data(addr
);
4542 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
4544 pfx
= nla_data(local
);
4550 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
4551 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
4552 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
4553 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
4554 [IFA_FLAGS
] = { .len
= sizeof(u32
) },
4555 [IFA_RT_PRIORITY
] = { .len
= sizeof(u32
) },
4556 [IFA_TARGET_NETNSID
] = { .type
= NLA_S32
},
4560 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
4561 struct netlink_ext_ack
*extack
)
4563 struct net
*net
= sock_net(skb
->sk
);
4564 struct ifaddrmsg
*ifm
;
4565 struct nlattr
*tb
[IFA_MAX
+1];
4566 struct in6_addr
*pfx
, *peer_pfx
;
4570 err
= nlmsg_parse_deprecated(nlh
, sizeof(*ifm
), tb
, IFA_MAX
,
4571 ifa_ipv6_policy
, extack
);
4575 ifm
= nlmsg_data(nlh
);
4576 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer_pfx
);
4580 ifa_flags
= tb
[IFA_FLAGS
] ? nla_get_u32(tb
[IFA_FLAGS
]) : ifm
->ifa_flags
;
4582 /* We ignore other flags so far. */
4583 ifa_flags
&= IFA_F_MANAGETEMPADDR
;
4585 return inet6_addr_del(net
, ifm
->ifa_index
, ifa_flags
, pfx
,
4586 ifm
->ifa_prefixlen
);
4589 static int modify_prefix_route(struct inet6_ifaddr
*ifp
,
4590 unsigned long expires
, u32 flags
)
4592 struct fib6_info
*f6i
;
4595 f6i
= addrconf_get_prefix_route(&ifp
->addr
, ifp
->prefix_len
,
4596 ifp
->idev
->dev
, 0, RTF_DEFAULT
, true);
4600 prio
= ifp
->rt_priority
? : IP6_RT_PRIO_ADDRCONF
;
4601 if (f6i
->fib6_metric
!= prio
) {
4602 /* delete old one */
4603 ip6_del_rt(dev_net(ifp
->idev
->dev
), f6i
);
4606 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
,
4607 ifp
->rt_priority
, ifp
->idev
->dev
,
4608 expires
, flags
, GFP_KERNEL
);
4611 fib6_clean_expires(f6i
);
4613 fib6_set_expires(f6i
, expires
);
4615 fib6_info_release(f6i
);
4621 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, struct ifa6_config
*cfg
)
4625 unsigned long timeout
;
4626 bool was_managetempaddr
;
4627 bool had_prefixroute
;
4631 if (!cfg
->valid_lft
|| cfg
->preferred_lft
> cfg
->valid_lft
)
4634 if (cfg
->ifa_flags
& IFA_F_MANAGETEMPADDR
&&
4635 (ifp
->flags
& IFA_F_TEMPORARY
|| ifp
->prefix_len
!= 64))
4638 if (!(ifp
->flags
& IFA_F_TENTATIVE
) || ifp
->flags
& IFA_F_DADFAILED
)
4639 cfg
->ifa_flags
&= ~IFA_F_OPTIMISTIC
;
4641 timeout
= addrconf_timeout_fixup(cfg
->valid_lft
, HZ
);
4642 if (addrconf_finite_timeout(timeout
)) {
4643 expires
= jiffies_to_clock_t(timeout
* HZ
);
4644 cfg
->valid_lft
= timeout
;
4645 flags
= RTF_EXPIRES
;
4649 cfg
->ifa_flags
|= IFA_F_PERMANENT
;
4652 timeout
= addrconf_timeout_fixup(cfg
->preferred_lft
, HZ
);
4653 if (addrconf_finite_timeout(timeout
)) {
4655 cfg
->ifa_flags
|= IFA_F_DEPRECATED
;
4656 cfg
->preferred_lft
= timeout
;
4659 spin_lock_bh(&ifp
->lock
);
4660 was_managetempaddr
= ifp
->flags
& IFA_F_MANAGETEMPADDR
;
4661 had_prefixroute
= ifp
->flags
& IFA_F_PERMANENT
&&
4662 !(ifp
->flags
& IFA_F_NOPREFIXROUTE
);
4663 ifp
->flags
&= ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
|
4664 IFA_F_HOMEADDRESS
| IFA_F_MANAGETEMPADDR
|
4665 IFA_F_NOPREFIXROUTE
);
4666 ifp
->flags
|= cfg
->ifa_flags
;
4667 ifp
->tstamp
= jiffies
;
4668 ifp
->valid_lft
= cfg
->valid_lft
;
4669 ifp
->prefered_lft
= cfg
->preferred_lft
;
4671 if (cfg
->rt_priority
&& cfg
->rt_priority
!= ifp
->rt_priority
)
4672 ifp
->rt_priority
= cfg
->rt_priority
;
4674 spin_unlock_bh(&ifp
->lock
);
4675 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
4676 ipv6_ifa_notify(0, ifp
);
4678 if (!(cfg
->ifa_flags
& IFA_F_NOPREFIXROUTE
)) {
4681 if (had_prefixroute
)
4682 rc
= modify_prefix_route(ifp
, expires
, flags
);
4684 /* prefix route could have been deleted; if so restore it */
4685 if (rc
== -ENOENT
) {
4686 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
,
4687 ifp
->rt_priority
, ifp
->idev
->dev
,
4688 expires
, flags
, GFP_KERNEL
);
4690 } else if (had_prefixroute
) {
4691 enum cleanup_prefix_rt_t action
;
4692 unsigned long rt_expires
;
4694 write_lock_bh(&ifp
->idev
->lock
);
4695 action
= check_cleanup_prefix_route(ifp
, &rt_expires
);
4696 write_unlock_bh(&ifp
->idev
->lock
);
4698 if (action
!= CLEANUP_PREFIX_RT_NOP
) {
4699 cleanup_prefix_route(ifp
, rt_expires
,
4700 action
== CLEANUP_PREFIX_RT_DEL
);
4704 if (was_managetempaddr
|| ifp
->flags
& IFA_F_MANAGETEMPADDR
) {
4705 if (was_managetempaddr
&&
4706 !(ifp
->flags
& IFA_F_MANAGETEMPADDR
)) {
4708 cfg
->preferred_lft
= 0;
4710 manage_tempaddrs(ifp
->idev
, ifp
, cfg
->valid_lft
,
4711 cfg
->preferred_lft
, !was_managetempaddr
,
4715 addrconf_verify_rtnl();
4721 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
4722 struct netlink_ext_ack
*extack
)
4724 struct net
*net
= sock_net(skb
->sk
);
4725 struct ifaddrmsg
*ifm
;
4726 struct nlattr
*tb
[IFA_MAX
+1];
4727 struct in6_addr
*peer_pfx
;
4728 struct inet6_ifaddr
*ifa
;
4729 struct net_device
*dev
;
4730 struct inet6_dev
*idev
;
4731 struct ifa6_config cfg
;
4734 err
= nlmsg_parse_deprecated(nlh
, sizeof(*ifm
), tb
, IFA_MAX
,
4735 ifa_ipv6_policy
, extack
);
4739 memset(&cfg
, 0, sizeof(cfg
));
4741 ifm
= nlmsg_data(nlh
);
4742 cfg
.pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer_pfx
);
4746 cfg
.peer_pfx
= peer_pfx
;
4747 cfg
.plen
= ifm
->ifa_prefixlen
;
4748 if (tb
[IFA_RT_PRIORITY
])
4749 cfg
.rt_priority
= nla_get_u32(tb
[IFA_RT_PRIORITY
]);
4751 cfg
.valid_lft
= INFINITY_LIFE_TIME
;
4752 cfg
.preferred_lft
= INFINITY_LIFE_TIME
;
4754 if (tb
[IFA_CACHEINFO
]) {
4755 struct ifa_cacheinfo
*ci
;
4757 ci
= nla_data(tb
[IFA_CACHEINFO
]);
4758 cfg
.valid_lft
= ci
->ifa_valid
;
4759 cfg
.preferred_lft
= ci
->ifa_prefered
;
4762 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
4767 cfg
.ifa_flags
= nla_get_u32(tb
[IFA_FLAGS
]);
4769 cfg
.ifa_flags
= ifm
->ifa_flags
;
4771 /* We ignore other flags so far. */
4772 cfg
.ifa_flags
&= IFA_F_NODAD
| IFA_F_HOMEADDRESS
|
4773 IFA_F_MANAGETEMPADDR
| IFA_F_NOPREFIXROUTE
|
4774 IFA_F_MCAUTOJOIN
| IFA_F_OPTIMISTIC
;
4776 idev
= ipv6_find_idev(dev
);
4780 if (!ipv6_allow_optimistic_dad(net
, idev
))
4781 cfg
.ifa_flags
&= ~IFA_F_OPTIMISTIC
;
4783 if (cfg
.ifa_flags
& IFA_F_NODAD
&&
4784 cfg
.ifa_flags
& IFA_F_OPTIMISTIC
) {
4785 NL_SET_ERR_MSG(extack
, "IFA_F_NODAD and IFA_F_OPTIMISTIC are mutually exclusive");
4789 ifa
= ipv6_get_ifaddr(net
, cfg
.pfx
, dev
, 1);
4792 * It would be best to check for !NLM_F_CREATE here but
4793 * userspace already relies on not having to provide this.
4795 return inet6_addr_add(net
, ifm
->ifa_index
, &cfg
, extack
);
4798 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
4799 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
4802 err
= inet6_addr_modify(ifa
, &cfg
);
4809 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u32 flags
,
4810 u8 scope
, int ifindex
)
4812 struct ifaddrmsg
*ifm
;
4814 ifm
= nlmsg_data(nlh
);
4815 ifm
->ifa_family
= AF_INET6
;
4816 ifm
->ifa_prefixlen
= prefixlen
;
4817 ifm
->ifa_flags
= flags
;
4818 ifm
->ifa_scope
= scope
;
4819 ifm
->ifa_index
= ifindex
;
4822 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
4823 unsigned long tstamp
, u32 preferred
, u32 valid
)
4825 struct ifa_cacheinfo ci
;
4827 ci
.cstamp
= cstamp_delta(cstamp
);
4828 ci
.tstamp
= cstamp_delta(tstamp
);
4829 ci
.ifa_prefered
= preferred
;
4830 ci
.ifa_valid
= valid
;
4832 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
4835 static inline int rt_scope(int ifa_scope
)
4837 if (ifa_scope
& IFA_HOST
)
4838 return RT_SCOPE_HOST
;
4839 else if (ifa_scope
& IFA_LINK
)
4840 return RT_SCOPE_LINK
;
4841 else if (ifa_scope
& IFA_SITE
)
4842 return RT_SCOPE_SITE
;
4844 return RT_SCOPE_UNIVERSE
;
4847 static inline int inet6_ifaddr_msgsize(void)
4849 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
4850 + nla_total_size(16) /* IFA_LOCAL */
4851 + nla_total_size(16) /* IFA_ADDRESS */
4852 + nla_total_size(sizeof(struct ifa_cacheinfo
))
4853 + nla_total_size(4) /* IFA_FLAGS */
4854 + nla_total_size(4) /* IFA_RT_PRIORITY */;
4863 struct inet6_fill_args
{
4870 enum addr_type_t type
;
4873 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
4874 struct inet6_fill_args
*args
)
4876 struct nlmsghdr
*nlh
;
4877 u32 preferred
, valid
;
4879 nlh
= nlmsg_put(skb
, args
->portid
, args
->seq
, args
->event
,
4880 sizeof(struct ifaddrmsg
), args
->flags
);
4884 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
4885 ifa
->idev
->dev
->ifindex
);
4887 if (args
->netnsid
>= 0 &&
4888 nla_put_s32(skb
, IFA_TARGET_NETNSID
, args
->netnsid
))
4891 if (!((ifa
->flags
&IFA_F_PERMANENT
) &&
4892 (ifa
->prefered_lft
== INFINITY_LIFE_TIME
))) {
4893 preferred
= ifa
->prefered_lft
;
4894 valid
= ifa
->valid_lft
;
4895 if (preferred
!= INFINITY_LIFE_TIME
) {
4896 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
4897 if (preferred
> tval
)
4901 if (valid
!= INFINITY_LIFE_TIME
) {
4909 preferred
= INFINITY_LIFE_TIME
;
4910 valid
= INFINITY_LIFE_TIME
;
4913 if (!ipv6_addr_any(&ifa
->peer_addr
)) {
4914 if (nla_put_in6_addr(skb
, IFA_LOCAL
, &ifa
->addr
) < 0 ||
4915 nla_put_in6_addr(skb
, IFA_ADDRESS
, &ifa
->peer_addr
) < 0)
4918 if (nla_put_in6_addr(skb
, IFA_ADDRESS
, &ifa
->addr
) < 0)
4921 if (ifa
->rt_priority
&&
4922 nla_put_u32(skb
, IFA_RT_PRIORITY
, ifa
->rt_priority
))
4925 if (put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0)
4928 if (nla_put_u32(skb
, IFA_FLAGS
, ifa
->flags
) < 0)
4931 nlmsg_end(skb
, nlh
);
4935 nlmsg_cancel(skb
, nlh
);
4939 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
4940 struct inet6_fill_args
*args
)
4942 struct nlmsghdr
*nlh
;
4943 u8 scope
= RT_SCOPE_UNIVERSE
;
4944 int ifindex
= ifmca
->idev
->dev
->ifindex
;
4946 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
4947 scope
= RT_SCOPE_SITE
;
4949 nlh
= nlmsg_put(skb
, args
->portid
, args
->seq
, args
->event
,
4950 sizeof(struct ifaddrmsg
), args
->flags
);
4954 if (args
->netnsid
>= 0 &&
4955 nla_put_s32(skb
, IFA_TARGET_NETNSID
, args
->netnsid
))
4958 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
4959 if (nla_put_in6_addr(skb
, IFA_MULTICAST
, &ifmca
->mca_addr
) < 0 ||
4960 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
4961 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
4962 nlmsg_cancel(skb
, nlh
);
4966 nlmsg_end(skb
, nlh
);
4970 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
4971 struct inet6_fill_args
*args
)
4973 struct net_device
*dev
= fib6_info_nh_dev(ifaca
->aca_rt
);
4974 int ifindex
= dev
? dev
->ifindex
: 1;
4975 struct nlmsghdr
*nlh
;
4976 u8 scope
= RT_SCOPE_UNIVERSE
;
4978 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
4979 scope
= RT_SCOPE_SITE
;
4981 nlh
= nlmsg_put(skb
, args
->portid
, args
->seq
, args
->event
,
4982 sizeof(struct ifaddrmsg
), args
->flags
);
4986 if (args
->netnsid
>= 0 &&
4987 nla_put_s32(skb
, IFA_TARGET_NETNSID
, args
->netnsid
))
4990 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
4991 if (nla_put_in6_addr(skb
, IFA_ANYCAST
, &ifaca
->aca_addr
) < 0 ||
4992 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
4993 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
4994 nlmsg_cancel(skb
, nlh
);
4998 nlmsg_end(skb
, nlh
);
5002 /* called with rcu_read_lock() */
5003 static int in6_dump_addrs(struct inet6_dev
*idev
, struct sk_buff
*skb
,
5004 struct netlink_callback
*cb
, int s_ip_idx
,
5005 struct inet6_fill_args
*fillargs
)
5007 struct ifmcaddr6
*ifmca
;
5008 struct ifacaddr6
*ifaca
;
5012 read_lock_bh(&idev
->lock
);
5013 switch (fillargs
->type
) {
5014 case UNICAST_ADDR
: {
5015 struct inet6_ifaddr
*ifa
;
5016 fillargs
->event
= RTM_NEWADDR
;
5018 /* unicast address incl. temp addr */
5019 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
5020 if (ip_idx
< s_ip_idx
)
5022 err
= inet6_fill_ifaddr(skb
, ifa
, fillargs
);
5025 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
5031 case MULTICAST_ADDR
:
5032 fillargs
->event
= RTM_GETMULTICAST
;
5034 /* multicast address */
5035 for (ifmca
= idev
->mc_list
; ifmca
;
5036 ifmca
= ifmca
->next
, ip_idx
++) {
5037 if (ip_idx
< s_ip_idx
)
5039 err
= inet6_fill_ifmcaddr(skb
, ifmca
, fillargs
);
5045 fillargs
->event
= RTM_GETANYCAST
;
5046 /* anycast address */
5047 for (ifaca
= idev
->ac_list
; ifaca
;
5048 ifaca
= ifaca
->aca_next
, ip_idx
++) {
5049 if (ip_idx
< s_ip_idx
)
5051 err
= inet6_fill_ifacaddr(skb
, ifaca
, fillargs
);
5059 read_unlock_bh(&idev
->lock
);
5060 cb
->args
[2] = ip_idx
;
5064 static int inet6_valid_dump_ifaddr_req(const struct nlmsghdr
*nlh
,
5065 struct inet6_fill_args
*fillargs
,
5066 struct net
**tgt_net
, struct sock
*sk
,
5067 struct netlink_callback
*cb
)
5069 struct netlink_ext_ack
*extack
= cb
->extack
;
5070 struct nlattr
*tb
[IFA_MAX
+1];
5071 struct ifaddrmsg
*ifm
;
5074 if (nlh
->nlmsg_len
< nlmsg_msg_size(sizeof(*ifm
))) {
5075 NL_SET_ERR_MSG_MOD(extack
, "Invalid header for address dump request");
5079 ifm
= nlmsg_data(nlh
);
5080 if (ifm
->ifa_prefixlen
|| ifm
->ifa_flags
|| ifm
->ifa_scope
) {
5081 NL_SET_ERR_MSG_MOD(extack
, "Invalid values in header for address dump request");
5085 fillargs
->ifindex
= ifm
->ifa_index
;
5086 if (fillargs
->ifindex
) {
5087 cb
->answer_flags
|= NLM_F_DUMP_FILTERED
;
5088 fillargs
->flags
|= NLM_F_DUMP_FILTERED
;
5091 err
= nlmsg_parse_deprecated_strict(nlh
, sizeof(*ifm
), tb
, IFA_MAX
,
5092 ifa_ipv6_policy
, extack
);
5096 for (i
= 0; i
<= IFA_MAX
; ++i
) {
5100 if (i
== IFA_TARGET_NETNSID
) {
5103 fillargs
->netnsid
= nla_get_s32(tb
[i
]);
5104 net
= rtnl_get_net_ns_capable(sk
, fillargs
->netnsid
);
5106 fillargs
->netnsid
= -1;
5107 NL_SET_ERR_MSG_MOD(extack
, "Invalid target network namespace id");
5108 return PTR_ERR(net
);
5112 NL_SET_ERR_MSG_MOD(extack
, "Unsupported attribute in dump request");
5120 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
5121 enum addr_type_t type
)
5123 const struct nlmsghdr
*nlh
= cb
->nlh
;
5124 struct inet6_fill_args fillargs
= {
5125 .portid
= NETLINK_CB(cb
->skb
).portid
,
5126 .seq
= cb
->nlh
->nlmsg_seq
,
5127 .flags
= NLM_F_MULTI
,
5131 struct net
*net
= sock_net(skb
->sk
);
5132 struct net
*tgt_net
= net
;
5133 int idx
, s_idx
, s_ip_idx
;
5135 struct net_device
*dev
;
5136 struct inet6_dev
*idev
;
5137 struct hlist_head
*head
;
5141 s_idx
= idx
= cb
->args
[1];
5142 s_ip_idx
= cb
->args
[2];
5144 if (cb
->strict_check
) {
5145 err
= inet6_valid_dump_ifaddr_req(nlh
, &fillargs
, &tgt_net
,
5151 if (fillargs
.ifindex
) {
5152 dev
= __dev_get_by_index(tgt_net
, fillargs
.ifindex
);
5157 idev
= __in6_dev_get(dev
);
5159 err
= in6_dump_addrs(idev
, skb
, cb
, s_ip_idx
,
5169 cb
->seq
= atomic_read(&tgt_net
->ipv6
.dev_addr_genid
) ^ tgt_net
->dev_base_seq
;
5170 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
5172 head
= &tgt_net
->dev_index_head
[h
];
5173 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
5176 if (h
> s_h
|| idx
> s_idx
)
5178 idev
= __in6_dev_get(dev
);
5182 if (in6_dump_addrs(idev
, skb
, cb
, s_ip_idx
,
5194 if (fillargs
.netnsid
>= 0)
5197 return skb
->len
? : err
;
5200 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
5202 enum addr_type_t type
= UNICAST_ADDR
;
5204 return inet6_dump_addr(skb
, cb
, type
);
5207 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
5209 enum addr_type_t type
= MULTICAST_ADDR
;
5211 return inet6_dump_addr(skb
, cb
, type
);
5215 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
5217 enum addr_type_t type
= ANYCAST_ADDR
;
5219 return inet6_dump_addr(skb
, cb
, type
);
5222 static int inet6_rtm_valid_getaddr_req(struct sk_buff
*skb
,
5223 const struct nlmsghdr
*nlh
,
5225 struct netlink_ext_ack
*extack
)
5227 struct ifaddrmsg
*ifm
;
5230 if (nlh
->nlmsg_len
< nlmsg_msg_size(sizeof(*ifm
))) {
5231 NL_SET_ERR_MSG_MOD(extack
, "Invalid header for get address request");
5235 ifm
= nlmsg_data(nlh
);
5236 if (ifm
->ifa_prefixlen
|| ifm
->ifa_flags
|| ifm
->ifa_scope
) {
5237 NL_SET_ERR_MSG_MOD(extack
, "Invalid values in header for get address request");
5241 if (!netlink_strict_get_check(skb
))
5242 return nlmsg_parse_deprecated(nlh
, sizeof(*ifm
), tb
, IFA_MAX
,
5243 ifa_ipv6_policy
, extack
);
5245 err
= nlmsg_parse_deprecated_strict(nlh
, sizeof(*ifm
), tb
, IFA_MAX
,
5246 ifa_ipv6_policy
, extack
);
5250 for (i
= 0; i
<= IFA_MAX
; i
++) {
5255 case IFA_TARGET_NETNSID
:
5260 NL_SET_ERR_MSG_MOD(extack
, "Unsupported attribute in get address request");
5268 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
*nlh
,
5269 struct netlink_ext_ack
*extack
)
5271 struct net
*net
= sock_net(in_skb
->sk
);
5272 struct inet6_fill_args fillargs
= {
5273 .portid
= NETLINK_CB(in_skb
).portid
,
5274 .seq
= nlh
->nlmsg_seq
,
5275 .event
= RTM_NEWADDR
,
5279 struct net
*tgt_net
= net
;
5280 struct ifaddrmsg
*ifm
;
5281 struct nlattr
*tb
[IFA_MAX
+1];
5282 struct in6_addr
*addr
= NULL
, *peer
;
5283 struct net_device
*dev
= NULL
;
5284 struct inet6_ifaddr
*ifa
;
5285 struct sk_buff
*skb
;
5288 err
= inet6_rtm_valid_getaddr_req(in_skb
, nlh
, tb
, extack
);
5292 if (tb
[IFA_TARGET_NETNSID
]) {
5293 fillargs
.netnsid
= nla_get_s32(tb
[IFA_TARGET_NETNSID
]);
5295 tgt_net
= rtnl_get_net_ns_capable(NETLINK_CB(in_skb
).sk
,
5297 if (IS_ERR(tgt_net
))
5298 return PTR_ERR(tgt_net
);
5301 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer
);
5305 ifm
= nlmsg_data(nlh
);
5307 dev
= dev_get_by_index(tgt_net
, ifm
->ifa_index
);
5309 ifa
= ipv6_get_ifaddr(tgt_net
, addr
, dev
, 1);
5311 err
= -EADDRNOTAVAIL
;
5315 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
);
5321 err
= inet6_fill_ifaddr(skb
, ifa
, &fillargs
);
5323 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
5324 WARN_ON(err
== -EMSGSIZE
);
5328 err
= rtnl_unicast(skb
, tgt_net
, NETLINK_CB(in_skb
).portid
);
5334 if (fillargs
.netnsid
>= 0)
5340 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
5342 struct sk_buff
*skb
;
5343 struct net
*net
= dev_net(ifa
->idev
->dev
);
5344 struct inet6_fill_args fillargs
= {
5353 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
5357 err
= inet6_fill_ifaddr(skb
, ifa
, &fillargs
);
5359 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
5360 WARN_ON(err
== -EMSGSIZE
);
5364 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
5368 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
5371 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
5372 __s32
*array
, int bytes
)
5374 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
5376 memset(array
, 0, bytes
);
5377 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
5378 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
5379 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
5380 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
5381 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
5382 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
5383 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
5384 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
5385 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] =
5386 jiffies_to_msecs(cnf
->rtr_solicit_interval
);
5387 array
[DEVCONF_RTR_SOLICIT_MAX_INTERVAL
] =
5388 jiffies_to_msecs(cnf
->rtr_solicit_max_interval
);
5389 array
[DEVCONF_RTR_SOLICIT_DELAY
] =
5390 jiffies_to_msecs(cnf
->rtr_solicit_delay
);
5391 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
5392 array
[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL
] =
5393 jiffies_to_msecs(cnf
->mldv1_unsolicited_report_interval
);
5394 array
[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL
] =
5395 jiffies_to_msecs(cnf
->mldv2_unsolicited_report_interval
);
5396 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
5397 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
5398 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
5399 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
5400 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
5401 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
5402 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
5403 array
[DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT
] = cnf
->accept_ra_min_hop_limit
;
5404 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
5405 #ifdef CONFIG_IPV6_ROUTER_PREF
5406 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
5407 array
[DEVCONF_RTR_PROBE_INTERVAL
] =
5408 jiffies_to_msecs(cnf
->rtr_probe_interval
);
5409 #ifdef CONFIG_IPV6_ROUTE_INFO
5410 array
[DEVCONF_ACCEPT_RA_RT_INFO_MIN_PLEN
] = cnf
->accept_ra_rt_info_min_plen
;
5411 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
5414 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
5415 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
5416 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
5417 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
5418 array
[DEVCONF_USE_OPTIMISTIC
] = cnf
->use_optimistic
;
5420 #ifdef CONFIG_IPV6_MROUTE
5421 array
[DEVCONF_MC_FORWARDING
] = cnf
->mc_forwarding
;
5423 array
[DEVCONF_DISABLE_IPV6
] = cnf
->disable_ipv6
;
5424 array
[DEVCONF_ACCEPT_DAD
] = cnf
->accept_dad
;
5425 array
[DEVCONF_FORCE_TLLAO
] = cnf
->force_tllao
;
5426 array
[DEVCONF_NDISC_NOTIFY
] = cnf
->ndisc_notify
;
5427 array
[DEVCONF_SUPPRESS_FRAG_NDISC
] = cnf
->suppress_frag_ndisc
;
5428 array
[DEVCONF_ACCEPT_RA_FROM_LOCAL
] = cnf
->accept_ra_from_local
;
5429 array
[DEVCONF_ACCEPT_RA_MTU
] = cnf
->accept_ra_mtu
;
5430 array
[DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN
] = cnf
->ignore_routes_with_linkdown
;
5431 /* we omit DEVCONF_STABLE_SECRET for now */
5432 array
[DEVCONF_USE_OIF_ADDRS_ONLY
] = cnf
->use_oif_addrs_only
;
5433 array
[DEVCONF_DROP_UNICAST_IN_L2_MULTICAST
] = cnf
->drop_unicast_in_l2_multicast
;
5434 array
[DEVCONF_DROP_UNSOLICITED_NA
] = cnf
->drop_unsolicited_na
;
5435 array
[DEVCONF_KEEP_ADDR_ON_DOWN
] = cnf
->keep_addr_on_down
;
5436 array
[DEVCONF_SEG6_ENABLED
] = cnf
->seg6_enabled
;
5437 #ifdef CONFIG_IPV6_SEG6_HMAC
5438 array
[DEVCONF_SEG6_REQUIRE_HMAC
] = cnf
->seg6_require_hmac
;
5440 array
[DEVCONF_ENHANCED_DAD
] = cnf
->enhanced_dad
;
5441 array
[DEVCONF_ADDR_GEN_MODE
] = cnf
->addr_gen_mode
;
5442 array
[DEVCONF_DISABLE_POLICY
] = cnf
->disable_policy
;
5443 array
[DEVCONF_NDISC_TCLASS
] = cnf
->ndisc_tclass
;
5446 static inline size_t inet6_ifla6_size(void)
5448 return nla_total_size(4) /* IFLA_INET6_FLAGS */
5449 + nla_total_size(sizeof(struct ifla_cacheinfo
))
5450 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
5451 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
5452 + nla_total_size(ICMP6_MIB_MAX
* 8) /* IFLA_INET6_ICMP6STATS */
5453 + nla_total_size(sizeof(struct in6_addr
)) /* IFLA_INET6_TOKEN */
5454 + nla_total_size(1) /* IFLA_INET6_ADDR_GEN_MODE */
5458 static inline size_t inet6_if_nlmsg_size(void)
5460 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
5461 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
5462 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
5463 + nla_total_size(4) /* IFLA_MTU */
5464 + nla_total_size(4) /* IFLA_LINK */
5465 + nla_total_size(1) /* IFLA_OPERSTATE */
5466 + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
5469 static inline void __snmp6_fill_statsdev(u64
*stats
, atomic_long_t
*mib
,
5473 int pad
= bytes
- sizeof(u64
) * ICMP6_MIB_MAX
;
5476 /* Use put_unaligned() because stats may not be aligned for u64. */
5477 put_unaligned(ICMP6_MIB_MAX
, &stats
[0]);
5478 for (i
= 1; i
< ICMP6_MIB_MAX
; i
++)
5479 put_unaligned(atomic_long_read(&mib
[i
]), &stats
[i
]);
5481 memset(&stats
[ICMP6_MIB_MAX
], 0, pad
);
5484 static inline void __snmp6_fill_stats64(u64
*stats
, void __percpu
*mib
,
5485 int bytes
, size_t syncpoff
)
5488 u64 buff
[IPSTATS_MIB_MAX
];
5489 int pad
= bytes
- sizeof(u64
) * IPSTATS_MIB_MAX
;
5493 memset(buff
, 0, sizeof(buff
));
5494 buff
[0] = IPSTATS_MIB_MAX
;
5496 for_each_possible_cpu(c
) {
5497 for (i
= 1; i
< IPSTATS_MIB_MAX
; i
++)
5498 buff
[i
] += snmp_get_cpu_field64(mib
, c
, i
, syncpoff
);
5501 memcpy(stats
, buff
, IPSTATS_MIB_MAX
* sizeof(u64
));
5502 memset(&stats
[IPSTATS_MIB_MAX
], 0, pad
);
5505 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
5509 case IFLA_INET6_STATS
:
5510 __snmp6_fill_stats64(stats
, idev
->stats
.ipv6
, bytes
,
5511 offsetof(struct ipstats_mib
, syncp
));
5513 case IFLA_INET6_ICMP6STATS
:
5514 __snmp6_fill_statsdev(stats
, idev
->stats
.icmpv6dev
->mibs
, bytes
);
5519 static int inet6_fill_ifla6_attrs(struct sk_buff
*skb
, struct inet6_dev
*idev
,
5520 u32 ext_filter_mask
)
5523 struct ifla_cacheinfo ci
;
5525 if (nla_put_u32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
))
5526 goto nla_put_failure
;
5527 ci
.max_reasm_len
= IPV6_MAXPLEN
;
5528 ci
.tstamp
= cstamp_delta(idev
->tstamp
);
5529 ci
.reachable_time
= jiffies_to_msecs(idev
->nd_parms
->reachable_time
);
5530 ci
.retrans_time
= jiffies_to_msecs(NEIGH_VAR(idev
->nd_parms
, RETRANS_TIME
));
5531 if (nla_put(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
))
5532 goto nla_put_failure
;
5533 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
5535 goto nla_put_failure
;
5536 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
5538 /* XXX - MC not implemented */
5540 if (ext_filter_mask
& RTEXT_FILTER_SKIP_STATS
)
5543 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
5545 goto nla_put_failure
;
5546 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
5548 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
5550 goto nla_put_failure
;
5551 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
5553 nla
= nla_reserve(skb
, IFLA_INET6_TOKEN
, sizeof(struct in6_addr
));
5555 goto nla_put_failure
;
5557 if (nla_put_u8(skb
, IFLA_INET6_ADDR_GEN_MODE
, idev
->cnf
.addr_gen_mode
))
5558 goto nla_put_failure
;
5560 read_lock_bh(&idev
->lock
);
5561 memcpy(nla_data(nla
), idev
->token
.s6_addr
, nla_len(nla
));
5562 read_unlock_bh(&idev
->lock
);
5570 static size_t inet6_get_link_af_size(const struct net_device
*dev
,
5571 u32 ext_filter_mask
)
5573 if (!__in6_dev_get(dev
))
5576 return inet6_ifla6_size();
5579 static int inet6_fill_link_af(struct sk_buff
*skb
, const struct net_device
*dev
,
5580 u32 ext_filter_mask
)
5582 struct inet6_dev
*idev
= __in6_dev_get(dev
);
5587 if (inet6_fill_ifla6_attrs(skb
, idev
, ext_filter_mask
) < 0)
5593 static int inet6_set_iftoken(struct inet6_dev
*idev
, struct in6_addr
*token
)
5595 struct inet6_ifaddr
*ifp
;
5596 struct net_device
*dev
= idev
->dev
;
5597 bool clear_token
, update_rs
= false;
5598 struct in6_addr ll_addr
;
5604 if (dev
->flags
& (IFF_LOOPBACK
| IFF_NOARP
))
5606 if (!ipv6_accept_ra(idev
))
5608 if (idev
->cnf
.rtr_solicits
== 0)
5611 write_lock_bh(&idev
->lock
);
5613 BUILD_BUG_ON(sizeof(token
->s6_addr
) != 16);
5614 memcpy(idev
->token
.s6_addr
+ 8, token
->s6_addr
+ 8, 8);
5616 write_unlock_bh(&idev
->lock
);
5618 clear_token
= ipv6_addr_any(token
);
5622 if (!idev
->dead
&& (idev
->if_flags
& IF_READY
) &&
5623 !ipv6_get_lladdr(dev
, &ll_addr
, IFA_F_TENTATIVE
|
5624 IFA_F_OPTIMISTIC
)) {
5625 /* If we're not ready, then normal ifup will take care
5626 * of this. Otherwise, we need to request our rs here.
5628 ndisc_send_rs(dev
, &ll_addr
, &in6addr_linklocal_allrouters
);
5633 write_lock_bh(&idev
->lock
);
5636 idev
->if_flags
|= IF_RS_SENT
;
5637 idev
->rs_interval
= rfc3315_s14_backoff_init(
5638 idev
->cnf
.rtr_solicit_interval
);
5639 idev
->rs_probes
= 1;
5640 addrconf_mod_rs_timer(idev
, idev
->rs_interval
);
5643 /* Well, that's kinda nasty ... */
5644 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
5645 spin_lock(&ifp
->lock
);
5646 if (ifp
->tokenized
) {
5648 ifp
->prefered_lft
= 0;
5650 spin_unlock(&ifp
->lock
);
5653 write_unlock_bh(&idev
->lock
);
5654 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
5655 addrconf_verify_rtnl();
5659 static const struct nla_policy inet6_af_policy
[IFLA_INET6_MAX
+ 1] = {
5660 [IFLA_INET6_ADDR_GEN_MODE
] = { .type
= NLA_U8
},
5661 [IFLA_INET6_TOKEN
] = { .len
= sizeof(struct in6_addr
) },
5664 static int inet6_validate_link_af(const struct net_device
*dev
,
5665 const struct nlattr
*nla
)
5667 struct nlattr
*tb
[IFLA_INET6_MAX
+ 1];
5669 if (dev
&& !__in6_dev_get(dev
))
5670 return -EAFNOSUPPORT
;
5672 return nla_parse_nested_deprecated(tb
, IFLA_INET6_MAX
, nla
,
5673 inet6_af_policy
, NULL
);
5676 static int check_addr_gen_mode(int mode
)
5678 if (mode
!= IN6_ADDR_GEN_MODE_EUI64
&&
5679 mode
!= IN6_ADDR_GEN_MODE_NONE
&&
5680 mode
!= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
&&
5681 mode
!= IN6_ADDR_GEN_MODE_RANDOM
)
5686 static int check_stable_privacy(struct inet6_dev
*idev
, struct net
*net
,
5689 if (mode
== IN6_ADDR_GEN_MODE_STABLE_PRIVACY
&&
5690 !idev
->cnf
.stable_secret
.initialized
&&
5691 !net
->ipv6
.devconf_dflt
->stable_secret
.initialized
)
5696 static int inet6_set_link_af(struct net_device
*dev
, const struct nlattr
*nla
)
5699 struct inet6_dev
*idev
= __in6_dev_get(dev
);
5700 struct nlattr
*tb
[IFLA_INET6_MAX
+ 1];
5703 return -EAFNOSUPPORT
;
5705 if (nla_parse_nested_deprecated(tb
, IFLA_INET6_MAX
, nla
, NULL
, NULL
) < 0)
5708 if (tb
[IFLA_INET6_TOKEN
]) {
5709 err
= inet6_set_iftoken(idev
, nla_data(tb
[IFLA_INET6_TOKEN
]));
5714 if (tb
[IFLA_INET6_ADDR_GEN_MODE
]) {
5715 u8 mode
= nla_get_u8(tb
[IFLA_INET6_ADDR_GEN_MODE
]);
5717 if (check_addr_gen_mode(mode
) < 0 ||
5718 check_stable_privacy(idev
, dev_net(dev
), mode
) < 0)
5721 idev
->cnf
.addr_gen_mode
= mode
;
5728 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
5729 u32 portid
, u32 seq
, int event
, unsigned int flags
)
5731 struct net_device
*dev
= idev
->dev
;
5732 struct ifinfomsg
*hdr
;
5733 struct nlmsghdr
*nlh
;
5736 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*hdr
), flags
);
5740 hdr
= nlmsg_data(nlh
);
5741 hdr
->ifi_family
= AF_INET6
;
5743 hdr
->ifi_type
= dev
->type
;
5744 hdr
->ifi_index
= dev
->ifindex
;
5745 hdr
->ifi_flags
= dev_get_flags(dev
);
5746 hdr
->ifi_change
= 0;
5748 if (nla_put_string(skb
, IFLA_IFNAME
, dev
->name
) ||
5750 nla_put(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
)) ||
5751 nla_put_u32(skb
, IFLA_MTU
, dev
->mtu
) ||
5752 (dev
->ifindex
!= dev_get_iflink(dev
) &&
5753 nla_put_u32(skb
, IFLA_LINK
, dev_get_iflink(dev
))) ||
5754 nla_put_u8(skb
, IFLA_OPERSTATE
,
5755 netif_running(dev
) ? dev
->operstate
: IF_OPER_DOWN
))
5756 goto nla_put_failure
;
5757 protoinfo
= nla_nest_start_noflag(skb
, IFLA_PROTINFO
);
5759 goto nla_put_failure
;
5761 if (inet6_fill_ifla6_attrs(skb
, idev
, 0) < 0)
5762 goto nla_put_failure
;
5764 nla_nest_end(skb
, protoinfo
);
5765 nlmsg_end(skb
, nlh
);
5769 nlmsg_cancel(skb
, nlh
);
5773 static int inet6_valid_dump_ifinfo(const struct nlmsghdr
*nlh
,
5774 struct netlink_ext_ack
*extack
)
5776 struct ifinfomsg
*ifm
;
5778 if (nlh
->nlmsg_len
< nlmsg_msg_size(sizeof(*ifm
))) {
5779 NL_SET_ERR_MSG_MOD(extack
, "Invalid header for link dump request");
5783 if (nlmsg_attrlen(nlh
, sizeof(*ifm
))) {
5784 NL_SET_ERR_MSG_MOD(extack
, "Invalid data after header");
5788 ifm
= nlmsg_data(nlh
);
5789 if (ifm
->__ifi_pad
|| ifm
->ifi_type
|| ifm
->ifi_flags
||
5790 ifm
->ifi_change
|| ifm
->ifi_index
) {
5791 NL_SET_ERR_MSG_MOD(extack
, "Invalid values in header for dump request");
5798 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
5800 struct net
*net
= sock_net(skb
->sk
);
5803 struct net_device
*dev
;
5804 struct inet6_dev
*idev
;
5805 struct hlist_head
*head
;
5807 /* only requests using strict checking can pass data to
5808 * influence the dump
5810 if (cb
->strict_check
) {
5811 int err
= inet6_valid_dump_ifinfo(cb
->nlh
, cb
->extack
);
5818 s_idx
= cb
->args
[1];
5821 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
5823 head
= &net
->dev_index_head
[h
];
5824 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
5827 idev
= __in6_dev_get(dev
);
5830 if (inet6_fill_ifinfo(skb
, idev
,
5831 NETLINK_CB(cb
->skb
).portid
,
5833 RTM_NEWLINK
, NLM_F_MULTI
) < 0)
5847 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
5849 struct sk_buff
*skb
;
5850 struct net
*net
= dev_net(idev
->dev
);
5853 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
5857 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
5859 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
5860 WARN_ON(err
== -EMSGSIZE
);
5864 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFINFO
, NULL
, GFP_ATOMIC
);
5868 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFINFO
, err
);
5871 static inline size_t inet6_prefix_nlmsg_size(void)
5873 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
5874 + nla_total_size(sizeof(struct in6_addr
))
5875 + nla_total_size(sizeof(struct prefix_cacheinfo
));
5878 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
5879 struct prefix_info
*pinfo
, u32 portid
, u32 seq
,
5880 int event
, unsigned int flags
)
5882 struct prefixmsg
*pmsg
;
5883 struct nlmsghdr
*nlh
;
5884 struct prefix_cacheinfo ci
;
5886 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*pmsg
), flags
);
5890 pmsg
= nlmsg_data(nlh
);
5891 pmsg
->prefix_family
= AF_INET6
;
5892 pmsg
->prefix_pad1
= 0;
5893 pmsg
->prefix_pad2
= 0;
5894 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
5895 pmsg
->prefix_len
= pinfo
->prefix_len
;
5896 pmsg
->prefix_type
= pinfo
->type
;
5897 pmsg
->prefix_pad3
= 0;
5898 pmsg
->prefix_flags
= 0;
5900 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
5901 if (pinfo
->autoconf
)
5902 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
5904 if (nla_put(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
))
5905 goto nla_put_failure
;
5906 ci
.preferred_time
= ntohl(pinfo
->prefered
);
5907 ci
.valid_time
= ntohl(pinfo
->valid
);
5908 if (nla_put(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
))
5909 goto nla_put_failure
;
5910 nlmsg_end(skb
, nlh
);
5914 nlmsg_cancel(skb
, nlh
);
5918 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
5919 struct prefix_info
*pinfo
)
5921 struct sk_buff
*skb
;
5922 struct net
*net
= dev_net(idev
->dev
);
5925 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
5929 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
5931 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
5932 WARN_ON(err
== -EMSGSIZE
);
5936 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
5940 rtnl_set_sk_err(net
, RTNLGRP_IPV6_PREFIX
, err
);
5943 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
5945 struct net
*net
= dev_net(ifp
->idev
->dev
);
5950 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
5955 * If the address was optimistic
5956 * we inserted the route at the start of
5957 * our DAD process, so we don't need
5960 if (!rcu_access_pointer(ifp
->rt
->fib6_node
))
5961 ip6_ins_rt(net
, ifp
->rt
);
5962 if (ifp
->idev
->cnf
.forwarding
)
5963 addrconf_join_anycast(ifp
);
5964 if (!ipv6_addr_any(&ifp
->peer_addr
))
5965 addrconf_prefix_route(&ifp
->peer_addr
, 128, 0,
5966 ifp
->idev
->dev
, 0, 0,
5970 if (ifp
->idev
->cnf
.forwarding
)
5971 addrconf_leave_anycast(ifp
);
5972 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
5973 if (!ipv6_addr_any(&ifp
->peer_addr
)) {
5974 struct fib6_info
*rt
;
5976 rt
= addrconf_get_prefix_route(&ifp
->peer_addr
, 128,
5977 ifp
->idev
->dev
, 0, 0,
5980 ip6_del_rt(net
, rt
);
5983 ip6_del_rt(net
, ifp
->rt
);
5986 rt_genid_bump_ipv6(net
);
5989 atomic_inc(&net
->ipv6
.dev_addr_genid
);
5992 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
5995 if (likely(ifp
->idev
->dead
== 0))
5996 __ipv6_ifa_notify(event
, ifp
);
5997 rcu_read_unlock_bh();
6000 #ifdef CONFIG_SYSCTL
6003 int addrconf_sysctl_forward(struct ctl_table
*ctl
, int write
,
6004 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
6006 int *valp
= ctl
->data
;
6009 struct ctl_table lctl
;
6013 * ctl->data points to idev->cnf.forwarding, we should
6014 * not modify it until we get the rtnl lock.
6019 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
6022 ret
= addrconf_fixup_forwarding(ctl
, valp
, val
);
6029 int addrconf_sysctl_mtu(struct ctl_table
*ctl
, int write
,
6030 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
6032 struct inet6_dev
*idev
= ctl
->extra1
;
6033 int min_mtu
= IPV6_MIN_MTU
;
6034 struct ctl_table lctl
;
6037 lctl
.extra1
= &min_mtu
;
6038 lctl
.extra2
= idev
? &idev
->dev
->mtu
: NULL
;
6040 return proc_dointvec_minmax(&lctl
, write
, buffer
, lenp
, ppos
);
6043 static void dev_disable_change(struct inet6_dev
*idev
)
6045 struct netdev_notifier_info info
;
6047 if (!idev
|| !idev
->dev
)
6050 netdev_notifier_info_init(&info
, idev
->dev
);
6051 if (idev
->cnf
.disable_ipv6
)
6052 addrconf_notify(NULL
, NETDEV_DOWN
, &info
);
6054 addrconf_notify(NULL
, NETDEV_UP
, &info
);
6057 static void addrconf_disable_change(struct net
*net
, __s32 newf
)
6059 struct net_device
*dev
;
6060 struct inet6_dev
*idev
;
6062 for_each_netdev(net
, dev
) {
6063 idev
= __in6_dev_get(dev
);
6065 int changed
= (!idev
->cnf
.disable_ipv6
) ^ (!newf
);
6066 idev
->cnf
.disable_ipv6
= newf
;
6068 dev_disable_change(idev
);
6073 static int addrconf_disable_ipv6(struct ctl_table
*table
, int *p
, int newf
)
6078 if (!rtnl_trylock())
6079 return restart_syscall();
6081 net
= (struct net
*)table
->extra2
;
6085 if (p
== &net
->ipv6
.devconf_dflt
->disable_ipv6
) {
6090 if (p
== &net
->ipv6
.devconf_all
->disable_ipv6
) {
6091 net
->ipv6
.devconf_dflt
->disable_ipv6
= newf
;
6092 addrconf_disable_change(net
, newf
);
6093 } else if ((!newf
) ^ (!old
))
6094 dev_disable_change((struct inet6_dev
*)table
->extra1
);
6101 int addrconf_sysctl_disable(struct ctl_table
*ctl
, int write
,
6102 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
6104 int *valp
= ctl
->data
;
6107 struct ctl_table lctl
;
6111 * ctl->data points to idev->cnf.disable_ipv6, we should
6112 * not modify it until we get the rtnl lock.
6117 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
6120 ret
= addrconf_disable_ipv6(ctl
, valp
, val
);
6127 int addrconf_sysctl_proxy_ndp(struct ctl_table
*ctl
, int write
,
6128 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
6130 int *valp
= ctl
->data
;
6135 ret
= proc_dointvec(ctl
, write
, buffer
, lenp
, ppos
);
6138 if (write
&& old
!= new) {
6139 struct net
*net
= ctl
->extra2
;
6141 if (!rtnl_trylock())
6142 return restart_syscall();
6144 if (valp
== &net
->ipv6
.devconf_dflt
->proxy_ndp
)
6145 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
6146 NETCONFA_PROXY_NEIGH
,
6147 NETCONFA_IFINDEX_DEFAULT
,
6148 net
->ipv6
.devconf_dflt
);
6149 else if (valp
== &net
->ipv6
.devconf_all
->proxy_ndp
)
6150 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
6151 NETCONFA_PROXY_NEIGH
,
6152 NETCONFA_IFINDEX_ALL
,
6153 net
->ipv6
.devconf_all
);
6155 struct inet6_dev
*idev
= ctl
->extra1
;
6157 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
6158 NETCONFA_PROXY_NEIGH
,
6168 static int addrconf_sysctl_addr_gen_mode(struct ctl_table
*ctl
, int write
,
6169 void __user
*buffer
, size_t *lenp
,
6174 struct inet6_dev
*idev
= (struct inet6_dev
*)ctl
->extra1
;
6175 struct net
*net
= (struct net
*)ctl
->extra2
;
6176 struct ctl_table tmp
= {
6178 .maxlen
= sizeof(new_val
),
6182 if (!rtnl_trylock())
6183 return restart_syscall();
6185 new_val
= *((u32
*)ctl
->data
);
6187 ret
= proc_douintvec(&tmp
, write
, buffer
, lenp
, ppos
);
6192 if (check_addr_gen_mode(new_val
) < 0) {
6198 if (check_stable_privacy(idev
, net
, new_val
) < 0) {
6203 if (idev
->cnf
.addr_gen_mode
!= new_val
) {
6204 idev
->cnf
.addr_gen_mode
= new_val
;
6205 addrconf_dev_config(idev
->dev
);
6207 } else if (&net
->ipv6
.devconf_all
->addr_gen_mode
== ctl
->data
) {
6208 struct net_device
*dev
;
6210 net
->ipv6
.devconf_dflt
->addr_gen_mode
= new_val
;
6211 for_each_netdev(net
, dev
) {
6212 idev
= __in6_dev_get(dev
);
6214 idev
->cnf
.addr_gen_mode
!= new_val
) {
6215 idev
->cnf
.addr_gen_mode
= new_val
;
6216 addrconf_dev_config(idev
->dev
);
6221 *((u32
*)ctl
->data
) = new_val
;
6230 static int addrconf_sysctl_stable_secret(struct ctl_table
*ctl
, int write
,
6231 void __user
*buffer
, size_t *lenp
,
6235 struct in6_addr addr
;
6236 char str
[IPV6_MAX_STRLEN
];
6237 struct ctl_table lctl
= *ctl
;
6238 struct net
*net
= ctl
->extra2
;
6239 struct ipv6_stable_secret
*secret
= ctl
->data
;
6241 if (&net
->ipv6
.devconf_all
->stable_secret
== ctl
->data
)
6244 lctl
.maxlen
= IPV6_MAX_STRLEN
;
6247 if (!rtnl_trylock())
6248 return restart_syscall();
6250 if (!write
&& !secret
->initialized
) {
6255 err
= snprintf(str
, sizeof(str
), "%pI6", &secret
->secret
);
6256 if (err
>= sizeof(str
)) {
6261 err
= proc_dostring(&lctl
, write
, buffer
, lenp
, ppos
);
6265 if (in6_pton(str
, -1, addr
.in6_u
.u6_addr8
, -1, NULL
) != 1) {
6270 secret
->initialized
= true;
6271 secret
->secret
= addr
;
6273 if (&net
->ipv6
.devconf_dflt
->stable_secret
== ctl
->data
) {
6274 struct net_device
*dev
;
6276 for_each_netdev(net
, dev
) {
6277 struct inet6_dev
*idev
= __in6_dev_get(dev
);
6280 idev
->cnf
.addr_gen_mode
=
6281 IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
6285 struct inet6_dev
*idev
= ctl
->extra1
;
6287 idev
->cnf
.addr_gen_mode
= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
6297 int addrconf_sysctl_ignore_routes_with_linkdown(struct ctl_table
*ctl
,
6299 void __user
*buffer
,
6303 int *valp
= ctl
->data
;
6306 struct ctl_table lctl
;
6309 /* ctl->data points to idev->cnf.ignore_routes_when_linkdown
6310 * we should not modify it until we get the rtnl lock.
6315 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
6318 ret
= addrconf_fixup_linkdown(ctl
, valp
, val
);
6325 void addrconf_set_nopolicy(struct rt6_info
*rt
, int action
)
6329 rt
->dst
.flags
|= DST_NOPOLICY
;
6331 rt
->dst
.flags
&= ~DST_NOPOLICY
;
6336 void addrconf_disable_policy_idev(struct inet6_dev
*idev
, int val
)
6338 struct inet6_ifaddr
*ifa
;
6340 read_lock_bh(&idev
->lock
);
6341 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
6342 spin_lock(&ifa
->lock
);
6344 struct fib6_info
*rt
= ifa
->rt
;
6348 ifa
->rt
->dst_nopolicy
= val
? true : false;
6349 if (rt
->rt6i_pcpu
) {
6350 for_each_possible_cpu(cpu
) {
6351 struct rt6_info
**rtp
;
6353 rtp
= per_cpu_ptr(rt
->rt6i_pcpu
, cpu
);
6354 addrconf_set_nopolicy(*rtp
, val
);
6359 spin_unlock(&ifa
->lock
);
6361 read_unlock_bh(&idev
->lock
);
6365 int addrconf_disable_policy(struct ctl_table
*ctl
, int *valp
, int val
)
6367 struct inet6_dev
*idev
;
6370 if (!rtnl_trylock())
6371 return restart_syscall();
6375 net
= (struct net
*)ctl
->extra2
;
6376 if (valp
== &net
->ipv6
.devconf_dflt
->disable_policy
) {
6381 if (valp
== &net
->ipv6
.devconf_all
->disable_policy
) {
6382 struct net_device
*dev
;
6384 for_each_netdev(net
, dev
) {
6385 idev
= __in6_dev_get(dev
);
6387 addrconf_disable_policy_idev(idev
, val
);
6390 idev
= (struct inet6_dev
*)ctl
->extra1
;
6391 addrconf_disable_policy_idev(idev
, val
);
6399 int addrconf_sysctl_disable_policy(struct ctl_table
*ctl
, int write
,
6400 void __user
*buffer
, size_t *lenp
,
6403 int *valp
= ctl
->data
;
6406 struct ctl_table lctl
;
6411 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
6413 if (write
&& (*valp
!= val
))
6414 ret
= addrconf_disable_policy(ctl
, valp
, val
);
6422 static int minus_one
= -1;
6423 static const int zero
= 0;
6424 static const int one
= 1;
6425 static const int two_five_five
= 255;
6427 static const struct ctl_table addrconf_sysctl
[] = {
6429 .procname
= "forwarding",
6430 .data
= &ipv6_devconf
.forwarding
,
6431 .maxlen
= sizeof(int),
6433 .proc_handler
= addrconf_sysctl_forward
,
6436 .procname
= "hop_limit",
6437 .data
= &ipv6_devconf
.hop_limit
,
6438 .maxlen
= sizeof(int),
6440 .proc_handler
= proc_dointvec_minmax
,
6441 .extra1
= (void *)&one
,
6442 .extra2
= (void *)&two_five_five
,
6446 .data
= &ipv6_devconf
.mtu6
,
6447 .maxlen
= sizeof(int),
6449 .proc_handler
= addrconf_sysctl_mtu
,
6452 .procname
= "accept_ra",
6453 .data
= &ipv6_devconf
.accept_ra
,
6454 .maxlen
= sizeof(int),
6456 .proc_handler
= proc_dointvec
,
6459 .procname
= "accept_redirects",
6460 .data
= &ipv6_devconf
.accept_redirects
,
6461 .maxlen
= sizeof(int),
6463 .proc_handler
= proc_dointvec
,
6466 .procname
= "autoconf",
6467 .data
= &ipv6_devconf
.autoconf
,
6468 .maxlen
= sizeof(int),
6470 .proc_handler
= proc_dointvec
,
6473 .procname
= "dad_transmits",
6474 .data
= &ipv6_devconf
.dad_transmits
,
6475 .maxlen
= sizeof(int),
6477 .proc_handler
= proc_dointvec
,
6480 .procname
= "router_solicitations",
6481 .data
= &ipv6_devconf
.rtr_solicits
,
6482 .maxlen
= sizeof(int),
6484 .proc_handler
= proc_dointvec_minmax
,
6485 .extra1
= &minus_one
,
6488 .procname
= "router_solicitation_interval",
6489 .data
= &ipv6_devconf
.rtr_solicit_interval
,
6490 .maxlen
= sizeof(int),
6492 .proc_handler
= proc_dointvec_jiffies
,
6495 .procname
= "router_solicitation_max_interval",
6496 .data
= &ipv6_devconf
.rtr_solicit_max_interval
,
6497 .maxlen
= sizeof(int),
6499 .proc_handler
= proc_dointvec_jiffies
,
6502 .procname
= "router_solicitation_delay",
6503 .data
= &ipv6_devconf
.rtr_solicit_delay
,
6504 .maxlen
= sizeof(int),
6506 .proc_handler
= proc_dointvec_jiffies
,
6509 .procname
= "force_mld_version",
6510 .data
= &ipv6_devconf
.force_mld_version
,
6511 .maxlen
= sizeof(int),
6513 .proc_handler
= proc_dointvec
,
6516 .procname
= "mldv1_unsolicited_report_interval",
6518 &ipv6_devconf
.mldv1_unsolicited_report_interval
,
6519 .maxlen
= sizeof(int),
6521 .proc_handler
= proc_dointvec_ms_jiffies
,
6524 .procname
= "mldv2_unsolicited_report_interval",
6526 &ipv6_devconf
.mldv2_unsolicited_report_interval
,
6527 .maxlen
= sizeof(int),
6529 .proc_handler
= proc_dointvec_ms_jiffies
,
6532 .procname
= "use_tempaddr",
6533 .data
= &ipv6_devconf
.use_tempaddr
,
6534 .maxlen
= sizeof(int),
6536 .proc_handler
= proc_dointvec
,
6539 .procname
= "temp_valid_lft",
6540 .data
= &ipv6_devconf
.temp_valid_lft
,
6541 .maxlen
= sizeof(int),
6543 .proc_handler
= proc_dointvec
,
6546 .procname
= "temp_prefered_lft",
6547 .data
= &ipv6_devconf
.temp_prefered_lft
,
6548 .maxlen
= sizeof(int),
6550 .proc_handler
= proc_dointvec
,
6553 .procname
= "regen_max_retry",
6554 .data
= &ipv6_devconf
.regen_max_retry
,
6555 .maxlen
= sizeof(int),
6557 .proc_handler
= proc_dointvec
,
6560 .procname
= "max_desync_factor",
6561 .data
= &ipv6_devconf
.max_desync_factor
,
6562 .maxlen
= sizeof(int),
6564 .proc_handler
= proc_dointvec
,
6567 .procname
= "max_addresses",
6568 .data
= &ipv6_devconf
.max_addresses
,
6569 .maxlen
= sizeof(int),
6571 .proc_handler
= proc_dointvec
,
6574 .procname
= "accept_ra_defrtr",
6575 .data
= &ipv6_devconf
.accept_ra_defrtr
,
6576 .maxlen
= sizeof(int),
6578 .proc_handler
= proc_dointvec
,
6581 .procname
= "accept_ra_min_hop_limit",
6582 .data
= &ipv6_devconf
.accept_ra_min_hop_limit
,
6583 .maxlen
= sizeof(int),
6585 .proc_handler
= proc_dointvec
,
6588 .procname
= "accept_ra_pinfo",
6589 .data
= &ipv6_devconf
.accept_ra_pinfo
,
6590 .maxlen
= sizeof(int),
6592 .proc_handler
= proc_dointvec
,
6594 #ifdef CONFIG_IPV6_ROUTER_PREF
6596 .procname
= "accept_ra_rtr_pref",
6597 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
6598 .maxlen
= sizeof(int),
6600 .proc_handler
= proc_dointvec
,
6603 .procname
= "router_probe_interval",
6604 .data
= &ipv6_devconf
.rtr_probe_interval
,
6605 .maxlen
= sizeof(int),
6607 .proc_handler
= proc_dointvec_jiffies
,
6609 #ifdef CONFIG_IPV6_ROUTE_INFO
6611 .procname
= "accept_ra_rt_info_min_plen",
6612 .data
= &ipv6_devconf
.accept_ra_rt_info_min_plen
,
6613 .maxlen
= sizeof(int),
6615 .proc_handler
= proc_dointvec
,
6618 .procname
= "accept_ra_rt_info_max_plen",
6619 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
6620 .maxlen
= sizeof(int),
6622 .proc_handler
= proc_dointvec
,
6627 .procname
= "proxy_ndp",
6628 .data
= &ipv6_devconf
.proxy_ndp
,
6629 .maxlen
= sizeof(int),
6631 .proc_handler
= addrconf_sysctl_proxy_ndp
,
6634 .procname
= "accept_source_route",
6635 .data
= &ipv6_devconf
.accept_source_route
,
6636 .maxlen
= sizeof(int),
6638 .proc_handler
= proc_dointvec
,
6640 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
6642 .procname
= "optimistic_dad",
6643 .data
= &ipv6_devconf
.optimistic_dad
,
6644 .maxlen
= sizeof(int),
6646 .proc_handler
= proc_dointvec
,
6649 .procname
= "use_optimistic",
6650 .data
= &ipv6_devconf
.use_optimistic
,
6651 .maxlen
= sizeof(int),
6653 .proc_handler
= proc_dointvec
,
6656 #ifdef CONFIG_IPV6_MROUTE
6658 .procname
= "mc_forwarding",
6659 .data
= &ipv6_devconf
.mc_forwarding
,
6660 .maxlen
= sizeof(int),
6662 .proc_handler
= proc_dointvec
,
6666 .procname
= "disable_ipv6",
6667 .data
= &ipv6_devconf
.disable_ipv6
,
6668 .maxlen
= sizeof(int),
6670 .proc_handler
= addrconf_sysctl_disable
,
6673 .procname
= "accept_dad",
6674 .data
= &ipv6_devconf
.accept_dad
,
6675 .maxlen
= sizeof(int),
6677 .proc_handler
= proc_dointvec
,
6680 .procname
= "force_tllao",
6681 .data
= &ipv6_devconf
.force_tllao
,
6682 .maxlen
= sizeof(int),
6684 .proc_handler
= proc_dointvec
6687 .procname
= "ndisc_notify",
6688 .data
= &ipv6_devconf
.ndisc_notify
,
6689 .maxlen
= sizeof(int),
6691 .proc_handler
= proc_dointvec
6694 .procname
= "suppress_frag_ndisc",
6695 .data
= &ipv6_devconf
.suppress_frag_ndisc
,
6696 .maxlen
= sizeof(int),
6698 .proc_handler
= proc_dointvec
6701 .procname
= "accept_ra_from_local",
6702 .data
= &ipv6_devconf
.accept_ra_from_local
,
6703 .maxlen
= sizeof(int),
6705 .proc_handler
= proc_dointvec
,
6708 .procname
= "accept_ra_mtu",
6709 .data
= &ipv6_devconf
.accept_ra_mtu
,
6710 .maxlen
= sizeof(int),
6712 .proc_handler
= proc_dointvec
,
6715 .procname
= "stable_secret",
6716 .data
= &ipv6_devconf
.stable_secret
,
6717 .maxlen
= IPV6_MAX_STRLEN
,
6719 .proc_handler
= addrconf_sysctl_stable_secret
,
6722 .procname
= "use_oif_addrs_only",
6723 .data
= &ipv6_devconf
.use_oif_addrs_only
,
6724 .maxlen
= sizeof(int),
6726 .proc_handler
= proc_dointvec
,
6729 .procname
= "ignore_routes_with_linkdown",
6730 .data
= &ipv6_devconf
.ignore_routes_with_linkdown
,
6731 .maxlen
= sizeof(int),
6733 .proc_handler
= addrconf_sysctl_ignore_routes_with_linkdown
,
6736 .procname
= "drop_unicast_in_l2_multicast",
6737 .data
= &ipv6_devconf
.drop_unicast_in_l2_multicast
,
6738 .maxlen
= sizeof(int),
6740 .proc_handler
= proc_dointvec
,
6743 .procname
= "drop_unsolicited_na",
6744 .data
= &ipv6_devconf
.drop_unsolicited_na
,
6745 .maxlen
= sizeof(int),
6747 .proc_handler
= proc_dointvec
,
6750 .procname
= "keep_addr_on_down",
6751 .data
= &ipv6_devconf
.keep_addr_on_down
,
6752 .maxlen
= sizeof(int),
6754 .proc_handler
= proc_dointvec
,
6758 .procname
= "seg6_enabled",
6759 .data
= &ipv6_devconf
.seg6_enabled
,
6760 .maxlen
= sizeof(int),
6762 .proc_handler
= proc_dointvec
,
6764 #ifdef CONFIG_IPV6_SEG6_HMAC
6766 .procname
= "seg6_require_hmac",
6767 .data
= &ipv6_devconf
.seg6_require_hmac
,
6768 .maxlen
= sizeof(int),
6770 .proc_handler
= proc_dointvec
,
6774 .procname
= "enhanced_dad",
6775 .data
= &ipv6_devconf
.enhanced_dad
,
6776 .maxlen
= sizeof(int),
6778 .proc_handler
= proc_dointvec
,
6781 .procname
= "addr_gen_mode",
6782 .data
= &ipv6_devconf
.addr_gen_mode
,
6783 .maxlen
= sizeof(int),
6785 .proc_handler
= addrconf_sysctl_addr_gen_mode
,
6788 .procname
= "disable_policy",
6789 .data
= &ipv6_devconf
.disable_policy
,
6790 .maxlen
= sizeof(int),
6792 .proc_handler
= addrconf_sysctl_disable_policy
,
6795 .procname
= "ndisc_tclass",
6796 .data
= &ipv6_devconf
.ndisc_tclass
,
6797 .maxlen
= sizeof(int),
6799 .proc_handler
= proc_dointvec_minmax
,
6800 .extra1
= (void *)&zero
,
6801 .extra2
= (void *)&two_five_five
,
6808 static int __addrconf_sysctl_register(struct net
*net
, char *dev_name
,
6809 struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
6812 struct ctl_table
*table
;
6813 char path
[sizeof("net/ipv6/conf/") + IFNAMSIZ
];
6815 table
= kmemdup(addrconf_sysctl
, sizeof(addrconf_sysctl
), GFP_KERNEL
);
6819 for (i
= 0; table
[i
].data
; i
++) {
6820 table
[i
].data
+= (char *)p
- (char *)&ipv6_devconf
;
6821 /* If one of these is already set, then it is not safe to
6822 * overwrite either of them: this makes proc_dointvec_minmax
6825 if (!table
[i
].extra1
&& !table
[i
].extra2
) {
6826 table
[i
].extra1
= idev
; /* embedded; no ref */
6827 table
[i
].extra2
= net
;
6831 snprintf(path
, sizeof(path
), "net/ipv6/conf/%s", dev_name
);
6833 p
->sysctl_header
= register_net_sysctl(net
, path
, table
);
6834 if (!p
->sysctl_header
)
6837 if (!strcmp(dev_name
, "all"))
6838 ifindex
= NETCONFA_IFINDEX_ALL
;
6839 else if (!strcmp(dev_name
, "default"))
6840 ifindex
= NETCONFA_IFINDEX_DEFAULT
;
6842 ifindex
= idev
->dev
->ifindex
;
6843 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
, NETCONFA_ALL
,
6853 static void __addrconf_sysctl_unregister(struct net
*net
,
6854 struct ipv6_devconf
*p
, int ifindex
)
6856 struct ctl_table
*table
;
6858 if (!p
->sysctl_header
)
6861 table
= p
->sysctl_header
->ctl_table_arg
;
6862 unregister_net_sysctl_table(p
->sysctl_header
);
6863 p
->sysctl_header
= NULL
;
6866 inet6_netconf_notify_devconf(net
, RTM_DELNETCONF
, 0, ifindex
, NULL
);
6869 static int addrconf_sysctl_register(struct inet6_dev
*idev
)
6873 if (!sysctl_dev_name_is_allowed(idev
->dev
->name
))
6876 err
= neigh_sysctl_register(idev
->dev
, idev
->nd_parms
,
6877 &ndisc_ifinfo_sysctl_change
);
6880 err
= __addrconf_sysctl_register(dev_net(idev
->dev
), idev
->dev
->name
,
6883 neigh_sysctl_unregister(idev
->nd_parms
);
6888 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
6890 __addrconf_sysctl_unregister(dev_net(idev
->dev
), &idev
->cnf
,
6891 idev
->dev
->ifindex
);
6892 neigh_sysctl_unregister(idev
->nd_parms
);
6898 static int __net_init
addrconf_init_net(struct net
*net
)
6901 struct ipv6_devconf
*all
, *dflt
;
6903 all
= kmemdup(&ipv6_devconf
, sizeof(ipv6_devconf
), GFP_KERNEL
);
6907 dflt
= kmemdup(&ipv6_devconf_dflt
, sizeof(ipv6_devconf_dflt
), GFP_KERNEL
);
6909 goto err_alloc_dflt
;
6911 if (IS_ENABLED(CONFIG_SYSCTL
) &&
6912 sysctl_devconf_inherit_init_net
== 1 && !net_eq(net
, &init_net
)) {
6913 memcpy(all
, init_net
.ipv6
.devconf_all
, sizeof(ipv6_devconf
));
6914 memcpy(dflt
, init_net
.ipv6
.devconf_dflt
, sizeof(ipv6_devconf_dflt
));
6917 /* these will be inherited by all namespaces */
6918 dflt
->autoconf
= ipv6_defaults
.autoconf
;
6919 dflt
->disable_ipv6
= ipv6_defaults
.disable_ipv6
;
6921 dflt
->stable_secret
.initialized
= false;
6922 all
->stable_secret
.initialized
= false;
6924 net
->ipv6
.devconf_all
= all
;
6925 net
->ipv6
.devconf_dflt
= dflt
;
6927 #ifdef CONFIG_SYSCTL
6928 err
= __addrconf_sysctl_register(net
, "all", NULL
, all
);
6932 err
= __addrconf_sysctl_register(net
, "default", NULL
, dflt
);
6938 #ifdef CONFIG_SYSCTL
6940 __addrconf_sysctl_unregister(net
, all
, NETCONFA_IFINDEX_ALL
);
6950 static void __net_exit
addrconf_exit_net(struct net
*net
)
6952 #ifdef CONFIG_SYSCTL
6953 __addrconf_sysctl_unregister(net
, net
->ipv6
.devconf_dflt
,
6954 NETCONFA_IFINDEX_DEFAULT
);
6955 __addrconf_sysctl_unregister(net
, net
->ipv6
.devconf_all
,
6956 NETCONFA_IFINDEX_ALL
);
6958 kfree(net
->ipv6
.devconf_dflt
);
6959 kfree(net
->ipv6
.devconf_all
);
6962 static struct pernet_operations addrconf_ops
= {
6963 .init
= addrconf_init_net
,
6964 .exit
= addrconf_exit_net
,
6967 static struct rtnl_af_ops inet6_ops __read_mostly
= {
6969 .fill_link_af
= inet6_fill_link_af
,
6970 .get_link_af_size
= inet6_get_link_af_size
,
6971 .validate_link_af
= inet6_validate_link_af
,
6972 .set_link_af
= inet6_set_link_af
,
6976 * Init / cleanup code
6979 int __init
addrconf_init(void)
6981 struct inet6_dev
*idev
;
6984 err
= ipv6_addr_label_init();
6986 pr_crit("%s: cannot initialize default policy table: %d\n",
6991 err
= register_pernet_subsys(&addrconf_ops
);
6995 addrconf_wq
= create_workqueue("ipv6_addrconf");
7001 /* The addrconf netdev notifier requires that loopback_dev
7002 * has it's ipv6 private information allocated and setup
7003 * before it can bring up and give link-local addresses
7004 * to other devices which are up.
7006 * Unfortunately, loopback_dev is not necessarily the first
7007 * entry in the global dev_base list of net devices. In fact,
7008 * it is likely to be the very last entry on that list.
7009 * So this causes the notifier registry below to try and
7010 * give link-local addresses to all devices besides loopback_dev
7011 * first, then loopback_dev, which cases all the non-loopback_dev
7012 * devices to fail to get a link-local address.
7014 * So, as a temporary fix, allocate the ipv6 structure for
7015 * loopback_dev first by hand.
7016 * Longer term, all of the dependencies ipv6 has upon the loopback
7017 * device and it being up should be removed.
7020 idev
= ipv6_add_dev(init_net
.loopback_dev
);
7023 err
= PTR_ERR(idev
);
7027 ip6_route_init_special_entries();
7029 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
7030 INIT_HLIST_HEAD(&inet6_addr_lst
[i
]);
7032 register_netdevice_notifier(&ipv6_dev_notf
);
7036 rtnl_af_register(&inet6_ops
);
7038 err
= rtnl_register_module(THIS_MODULE
, PF_INET6
, RTM_GETLINK
,
7039 NULL
, inet6_dump_ifinfo
, 0);
7043 err
= rtnl_register_module(THIS_MODULE
, PF_INET6
, RTM_NEWADDR
,
7044 inet6_rtm_newaddr
, NULL
, 0);
7047 err
= rtnl_register_module(THIS_MODULE
, PF_INET6
, RTM_DELADDR
,
7048 inet6_rtm_deladdr
, NULL
, 0);
7051 err
= rtnl_register_module(THIS_MODULE
, PF_INET6
, RTM_GETADDR
,
7052 inet6_rtm_getaddr
, inet6_dump_ifaddr
,
7053 RTNL_FLAG_DOIT_UNLOCKED
);
7056 err
= rtnl_register_module(THIS_MODULE
, PF_INET6
, RTM_GETMULTICAST
,
7057 NULL
, inet6_dump_ifmcaddr
, 0);
7060 err
= rtnl_register_module(THIS_MODULE
, PF_INET6
, RTM_GETANYCAST
,
7061 NULL
, inet6_dump_ifacaddr
, 0);
7064 err
= rtnl_register_module(THIS_MODULE
, PF_INET6
, RTM_GETNETCONF
,
7065 inet6_netconf_get_devconf
,
7066 inet6_netconf_dump_devconf
,
7067 RTNL_FLAG_DOIT_UNLOCKED
);
7070 err
= ipv6_addr_label_rtnl_register();
7076 rtnl_unregister_all(PF_INET6
);
7077 rtnl_af_unregister(&inet6_ops
);
7078 unregister_netdevice_notifier(&ipv6_dev_notf
);
7080 destroy_workqueue(addrconf_wq
);
7082 unregister_pernet_subsys(&addrconf_ops
);
7084 ipv6_addr_label_cleanup();
7089 void addrconf_cleanup(void)
7091 struct net_device
*dev
;
7094 unregister_netdevice_notifier(&ipv6_dev_notf
);
7095 unregister_pernet_subsys(&addrconf_ops
);
7096 ipv6_addr_label_cleanup();
7098 rtnl_af_unregister(&inet6_ops
);
7102 /* clean dev list */
7103 for_each_netdev(&init_net
, dev
) {
7104 if (__in6_dev_get(dev
) == NULL
)
7106 addrconf_ifdown(dev
, 1);
7108 addrconf_ifdown(init_net
.loopback_dev
, 2);
7113 spin_lock_bh(&addrconf_hash_lock
);
7114 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
7115 WARN_ON(!hlist_empty(&inet6_addr_lst
[i
]));
7116 spin_unlock_bh(&addrconf_hash_lock
);
7117 cancel_delayed_work(&addr_chk_work
);
7120 destroy_workqueue(addrconf_wq
);