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 /* Set to 3 to get tracing... */
101 #define ADBG(fmt, ...) printk(fmt, ##__VA_ARGS__)
103 #define ADBG(fmt, ...) do { if (0) printk(fmt, ##__VA_ARGS__); } while (0)
106 #define INFINITY_LIFE_TIME 0xFFFFFFFF
108 #define IPV6_MAX_STRLEN \
109 sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255")
111 static inline u32
cstamp_delta(unsigned long cstamp
)
113 return (cstamp
- INITIAL_JIFFIES
) * 100UL / HZ
;
116 static inline s32
rfc3315_s14_backoff_init(s32 irt
)
118 /* multiply 'initial retransmission time' by 0.9 .. 1.1 */
119 u64 tmp
= (900000 + prandom_u32() % 200001) * (u64
)irt
;
120 do_div(tmp
, 1000000);
124 static inline s32
rfc3315_s14_backoff_update(s32 rt
, s32 mrt
)
126 /* multiply 'retransmission timeout' by 1.9 .. 2.1 */
127 u64 tmp
= (1900000 + prandom_u32() % 200001) * (u64
)rt
;
128 do_div(tmp
, 1000000);
129 if ((s32
)tmp
> mrt
) {
130 /* multiply 'maximum retransmission time' by 0.9 .. 1.1 */
131 tmp
= (900000 + prandom_u32() % 200001) * (u64
)mrt
;
132 do_div(tmp
, 1000000);
138 static int addrconf_sysctl_register(struct inet6_dev
*idev
);
139 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
);
141 static inline int addrconf_sysctl_register(struct inet6_dev
*idev
)
146 static inline void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
151 static void ipv6_regen_rndid(struct inet6_dev
*idev
);
152 static void ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
154 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
);
155 static int ipv6_count_addresses(const struct inet6_dev
*idev
);
156 static int ipv6_generate_stable_address(struct in6_addr
*addr
,
158 const struct inet6_dev
*idev
);
160 #define IN6_ADDR_HSIZE_SHIFT 8
161 #define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT)
163 * Configured unicast address hash table
165 static struct hlist_head inet6_addr_lst
[IN6_ADDR_HSIZE
];
166 static DEFINE_SPINLOCK(addrconf_hash_lock
);
168 static void addrconf_verify(void);
169 static void addrconf_verify_rtnl(void);
170 static void addrconf_verify_work(struct work_struct
*);
172 static struct workqueue_struct
*addrconf_wq
;
173 static DECLARE_DELAYED_WORK(addr_chk_work
, addrconf_verify_work
);
175 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
176 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
178 static void addrconf_type_change(struct net_device
*dev
,
179 unsigned long event
);
180 static int addrconf_ifdown(struct net_device
*dev
, int how
);
182 static struct rt6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
184 const struct net_device
*dev
,
185 u32 flags
, u32 noflags
);
187 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
);
188 static void addrconf_dad_work(struct work_struct
*w
);
189 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
, bool bump_id
);
190 static void addrconf_dad_run(struct inet6_dev
*idev
);
191 static void addrconf_rs_timer(unsigned long data
);
192 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
193 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
195 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
196 struct prefix_info
*pinfo
);
198 static struct ipv6_devconf ipv6_devconf __read_mostly
= {
200 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
201 .mtu6
= IPV6_MIN_MTU
,
203 .accept_redirects
= 1,
205 .force_mld_version
= 0,
206 .mldv1_unsolicited_report_interval
= 10 * HZ
,
207 .mldv2_unsolicited_report_interval
= HZ
,
209 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
210 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
211 .rtr_solicit_max_interval
= RTR_SOLICITATION_MAX_INTERVAL
,
212 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
214 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
215 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
216 .regen_max_retry
= REGEN_MAX_RETRY
,
217 .max_desync_factor
= MAX_DESYNC_FACTOR
,
218 .max_addresses
= IPV6_MAX_ADDRESSES
,
219 .accept_ra_defrtr
= 1,
220 .accept_ra_from_local
= 0,
221 .accept_ra_min_hop_limit
= 1,
222 .accept_ra_pinfo
= 1,
223 #ifdef CONFIG_IPV6_ROUTER_PREF
224 .accept_ra_rtr_pref
= 1,
225 .rtr_probe_interval
= 60 * HZ
,
226 #ifdef CONFIG_IPV6_ROUTE_INFO
227 .accept_ra_rt_info_min_plen
= 0,
228 .accept_ra_rt_info_max_plen
= 0,
232 .accept_source_route
= 0, /* we do not accept RH0 by default. */
235 .suppress_frag_ndisc
= 1,
238 .initialized
= false,
240 .use_oif_addrs_only
= 0,
241 .ignore_routes_with_linkdown
= 0,
242 .keep_addr_on_down
= 0,
244 #ifdef CONFIG_IPV6_SEG6_HMAC
245 .seg6_require_hmac
= 0,
248 .addr_gen_mode
= IN6_ADDR_GEN_MODE_EUI64
,
252 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly
= {
254 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
255 .mtu6
= IPV6_MIN_MTU
,
257 .accept_redirects
= 1,
259 .force_mld_version
= 0,
260 .mldv1_unsolicited_report_interval
= 10 * HZ
,
261 .mldv2_unsolicited_report_interval
= HZ
,
263 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
264 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
265 .rtr_solicit_max_interval
= RTR_SOLICITATION_MAX_INTERVAL
,
266 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
268 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
269 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
270 .regen_max_retry
= REGEN_MAX_RETRY
,
271 .max_desync_factor
= MAX_DESYNC_FACTOR
,
272 .max_addresses
= IPV6_MAX_ADDRESSES
,
273 .accept_ra_defrtr
= 1,
274 .accept_ra_from_local
= 0,
275 .accept_ra_min_hop_limit
= 1,
276 .accept_ra_pinfo
= 1,
277 #ifdef CONFIG_IPV6_ROUTER_PREF
278 .accept_ra_rtr_pref
= 1,
279 .rtr_probe_interval
= 60 * HZ
,
280 #ifdef CONFIG_IPV6_ROUTE_INFO
281 .accept_ra_rt_info_min_plen
= 0,
282 .accept_ra_rt_info_max_plen
= 0,
286 .accept_source_route
= 0, /* we do not accept RH0 by default. */
289 .suppress_frag_ndisc
= 1,
292 .initialized
= false,
294 .use_oif_addrs_only
= 0,
295 .ignore_routes_with_linkdown
= 0,
296 .keep_addr_on_down
= 0,
298 #ifdef CONFIG_IPV6_SEG6_HMAC
299 .seg6_require_hmac
= 0,
302 .addr_gen_mode
= IN6_ADDR_GEN_MODE_EUI64
,
306 /* Check if link is ready: is it up and is a valid qdisc available */
307 static inline bool addrconf_link_ready(const struct net_device
*dev
)
309 return netif_oper_up(dev
) && !qdisc_tx_is_noop(dev
);
312 static void addrconf_del_rs_timer(struct inet6_dev
*idev
)
314 if (del_timer(&idev
->rs_timer
))
318 static void addrconf_del_dad_work(struct inet6_ifaddr
*ifp
)
320 if (cancel_delayed_work(&ifp
->dad_work
))
324 static void addrconf_mod_rs_timer(struct inet6_dev
*idev
,
327 if (!timer_pending(&idev
->rs_timer
))
329 mod_timer(&idev
->rs_timer
, jiffies
+ when
);
332 static void addrconf_mod_dad_work(struct inet6_ifaddr
*ifp
,
336 if (mod_delayed_work(addrconf_wq
, &ifp
->dad_work
, delay
))
340 static int snmp6_alloc_dev(struct inet6_dev
*idev
)
344 idev
->stats
.ipv6
= alloc_percpu(struct ipstats_mib
);
345 if (!idev
->stats
.ipv6
)
348 for_each_possible_cpu(i
) {
349 struct ipstats_mib
*addrconf_stats
;
350 addrconf_stats
= per_cpu_ptr(idev
->stats
.ipv6
, i
);
351 u64_stats_init(&addrconf_stats
->syncp
);
355 idev
->stats
.icmpv6dev
= kzalloc(sizeof(struct icmpv6_mib_device
),
357 if (!idev
->stats
.icmpv6dev
)
359 idev
->stats
.icmpv6msgdev
= kzalloc(sizeof(struct icmpv6msg_mib_device
),
361 if (!idev
->stats
.icmpv6msgdev
)
367 kfree(idev
->stats
.icmpv6dev
);
369 free_percpu(idev
->stats
.ipv6
);
374 static struct inet6_dev
*ipv6_add_dev(struct net_device
*dev
)
376 struct inet6_dev
*ndev
;
381 if (dev
->mtu
< IPV6_MIN_MTU
)
382 return ERR_PTR(-EINVAL
);
384 ndev
= kzalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
388 rwlock_init(&ndev
->lock
);
390 INIT_LIST_HEAD(&ndev
->addr_list
);
391 setup_timer(&ndev
->rs_timer
, addrconf_rs_timer
,
392 (unsigned long)ndev
);
393 memcpy(&ndev
->cnf
, dev_net(dev
)->ipv6
.devconf_dflt
, sizeof(ndev
->cnf
));
395 if (ndev
->cnf
.stable_secret
.initialized
)
396 ndev
->cnf
.addr_gen_mode
= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
398 ndev
->cnf
.addr_gen_mode
= ipv6_devconf_dflt
.addr_gen_mode
;
400 ndev
->cnf
.mtu6
= dev
->mtu
;
401 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
402 if (!ndev
->nd_parms
) {
406 if (ndev
->cnf
.forwarding
)
407 dev_disable_lro(dev
);
408 /* We refer to the device */
411 if (snmp6_alloc_dev(ndev
) < 0) {
413 "%s: cannot allocate memory for statistics; dev=%s.\n",
414 __func__
, dev
->name
);
415 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
421 if (snmp6_register_dev(ndev
) < 0) {
423 "%s: cannot create /proc/net/dev_snmp6/%s\n",
424 __func__
, dev
->name
);
428 /* One reference from device. */
429 refcount_set(&ndev
->refcnt
, 1);
431 if (dev
->flags
& (IFF_NOARP
| IFF_LOOPBACK
))
432 ndev
->cnf
.accept_dad
= -1;
434 #if IS_ENABLED(CONFIG_IPV6_SIT)
435 if (dev
->type
== ARPHRD_SIT
&& (dev
->priv_flags
& IFF_ISATAP
)) {
436 pr_info("%s: Disabled Multicast RS\n", dev
->name
);
437 ndev
->cnf
.rtr_solicits
= 0;
441 INIT_LIST_HEAD(&ndev
->tempaddr_list
);
442 ndev
->desync_factor
= U32_MAX
;
443 if ((dev
->flags
&IFF_LOOPBACK
) ||
444 dev
->type
== ARPHRD_TUNNEL
||
445 dev
->type
== ARPHRD_TUNNEL6
||
446 dev
->type
== ARPHRD_SIT
||
447 dev
->type
== ARPHRD_NONE
) {
448 ndev
->cnf
.use_tempaddr
= -1;
450 ipv6_regen_rndid(ndev
);
452 ndev
->token
= in6addr_any
;
454 if (netif_running(dev
) && addrconf_link_ready(dev
))
455 ndev
->if_flags
|= IF_READY
;
457 ipv6_mc_init_dev(ndev
);
458 ndev
->tstamp
= jiffies
;
459 err
= addrconf_sysctl_register(ndev
);
461 ipv6_mc_destroy_dev(ndev
);
462 snmp6_unregister_dev(ndev
);
465 /* protected by rtnl_lock */
466 rcu_assign_pointer(dev
->ip6_ptr
, ndev
);
468 /* Join interface-local all-node multicast group */
469 ipv6_dev_mc_inc(dev
, &in6addr_interfacelocal_allnodes
);
471 /* Join all-node multicast group */
472 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allnodes
);
474 /* Join all-router multicast group if forwarding is set */
475 if (ndev
->cnf
.forwarding
&& (dev
->flags
& IFF_MULTICAST
))
476 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
481 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
483 in6_dev_finish_destroy(ndev
);
487 static struct inet6_dev
*ipv6_find_idev(struct net_device
*dev
)
489 struct inet6_dev
*idev
;
493 idev
= __in6_dev_get(dev
);
495 idev
= ipv6_add_dev(dev
);
500 if (dev
->flags
&IFF_UP
)
505 static int inet6_netconf_msgsize_devconf(int type
)
507 int size
= NLMSG_ALIGN(sizeof(struct netconfmsg
))
508 + nla_total_size(4); /* NETCONFA_IFINDEX */
511 if (type
== NETCONFA_ALL
)
514 if (all
|| type
== NETCONFA_FORWARDING
)
515 size
+= nla_total_size(4);
516 #ifdef CONFIG_IPV6_MROUTE
517 if (all
|| type
== NETCONFA_MC_FORWARDING
)
518 size
+= nla_total_size(4);
520 if (all
|| type
== NETCONFA_PROXY_NEIGH
)
521 size
+= nla_total_size(4);
523 if (all
|| type
== NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
)
524 size
+= nla_total_size(4);
529 static int inet6_netconf_fill_devconf(struct sk_buff
*skb
, int ifindex
,
530 struct ipv6_devconf
*devconf
, u32 portid
,
531 u32 seq
, int event
, unsigned int flags
,
534 struct nlmsghdr
*nlh
;
535 struct netconfmsg
*ncm
;
538 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct netconfmsg
),
543 if (type
== NETCONFA_ALL
)
546 ncm
= nlmsg_data(nlh
);
547 ncm
->ncm_family
= AF_INET6
;
549 if (nla_put_s32(skb
, NETCONFA_IFINDEX
, ifindex
) < 0)
550 goto nla_put_failure
;
555 if ((all
|| type
== NETCONFA_FORWARDING
) &&
556 nla_put_s32(skb
, NETCONFA_FORWARDING
, devconf
->forwarding
) < 0)
557 goto nla_put_failure
;
558 #ifdef CONFIG_IPV6_MROUTE
559 if ((all
|| type
== NETCONFA_MC_FORWARDING
) &&
560 nla_put_s32(skb
, NETCONFA_MC_FORWARDING
,
561 devconf
->mc_forwarding
) < 0)
562 goto nla_put_failure
;
564 if ((all
|| type
== NETCONFA_PROXY_NEIGH
) &&
565 nla_put_s32(skb
, NETCONFA_PROXY_NEIGH
, devconf
->proxy_ndp
) < 0)
566 goto nla_put_failure
;
568 if ((all
|| type
== NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
) &&
569 nla_put_s32(skb
, NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
,
570 devconf
->ignore_routes_with_linkdown
) < 0)
571 goto nla_put_failure
;
578 nlmsg_cancel(skb
, nlh
);
582 void inet6_netconf_notify_devconf(struct net
*net
, int event
, int type
,
583 int ifindex
, struct ipv6_devconf
*devconf
)
588 skb
= nlmsg_new(inet6_netconf_msgsize_devconf(type
), GFP_KERNEL
);
592 err
= inet6_netconf_fill_devconf(skb
, ifindex
, devconf
, 0, 0,
595 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
596 WARN_ON(err
== -EMSGSIZE
);
600 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_NETCONF
, NULL
, GFP_KERNEL
);
603 rtnl_set_sk_err(net
, RTNLGRP_IPV6_NETCONF
, err
);
606 static const struct nla_policy devconf_ipv6_policy
[NETCONFA_MAX
+1] = {
607 [NETCONFA_IFINDEX
] = { .len
= sizeof(int) },
608 [NETCONFA_FORWARDING
] = { .len
= sizeof(int) },
609 [NETCONFA_PROXY_NEIGH
] = { .len
= sizeof(int) },
610 [NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
] = { .len
= sizeof(int) },
613 static int inet6_netconf_get_devconf(struct sk_buff
*in_skb
,
614 struct nlmsghdr
*nlh
,
615 struct netlink_ext_ack
*extack
)
617 struct net
*net
= sock_net(in_skb
->sk
);
618 struct nlattr
*tb
[NETCONFA_MAX
+1];
619 struct inet6_dev
*in6_dev
= NULL
;
620 struct net_device
*dev
= NULL
;
621 struct netconfmsg
*ncm
;
623 struct ipv6_devconf
*devconf
;
627 err
= nlmsg_parse(nlh
, sizeof(*ncm
), tb
, NETCONFA_MAX
,
628 devconf_ipv6_policy
, extack
);
632 if (!tb
[NETCONFA_IFINDEX
])
636 ifindex
= nla_get_s32(tb
[NETCONFA_IFINDEX
]);
638 case NETCONFA_IFINDEX_ALL
:
639 devconf
= net
->ipv6
.devconf_all
;
641 case NETCONFA_IFINDEX_DEFAULT
:
642 devconf
= net
->ipv6
.devconf_dflt
;
645 dev
= dev_get_by_index(net
, ifindex
);
648 in6_dev
= in6_dev_get(dev
);
651 devconf
= &in6_dev
->cnf
;
656 skb
= nlmsg_new(inet6_netconf_msgsize_devconf(NETCONFA_ALL
), GFP_KERNEL
);
660 err
= inet6_netconf_fill_devconf(skb
, ifindex
, devconf
,
661 NETLINK_CB(in_skb
).portid
,
662 nlh
->nlmsg_seq
, RTM_NEWNETCONF
, 0,
665 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
666 WARN_ON(err
== -EMSGSIZE
);
670 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).portid
);
673 in6_dev_put(in6_dev
);
679 static int inet6_netconf_dump_devconf(struct sk_buff
*skb
,
680 struct netlink_callback
*cb
)
682 struct net
*net
= sock_net(skb
->sk
);
685 struct net_device
*dev
;
686 struct inet6_dev
*idev
;
687 struct hlist_head
*head
;
690 s_idx
= idx
= cb
->args
[1];
692 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
694 head
= &net
->dev_index_head
[h
];
696 cb
->seq
= atomic_read(&net
->ipv6
.dev_addr_genid
) ^
698 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
701 idev
= __in6_dev_get(dev
);
705 if (inet6_netconf_fill_devconf(skb
, dev
->ifindex
,
707 NETLINK_CB(cb
->skb
).portid
,
715 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
721 if (h
== NETDEV_HASHENTRIES
) {
722 if (inet6_netconf_fill_devconf(skb
, NETCONFA_IFINDEX_ALL
,
723 net
->ipv6
.devconf_all
,
724 NETLINK_CB(cb
->skb
).portid
,
726 RTM_NEWNETCONF
, NLM_F_MULTI
,
732 if (h
== NETDEV_HASHENTRIES
+ 1) {
733 if (inet6_netconf_fill_devconf(skb
, NETCONFA_IFINDEX_DEFAULT
,
734 net
->ipv6
.devconf_dflt
,
735 NETLINK_CB(cb
->skb
).portid
,
737 RTM_NEWNETCONF
, NLM_F_MULTI
,
751 static void dev_forward_change(struct inet6_dev
*idev
)
753 struct net_device
*dev
;
754 struct inet6_ifaddr
*ifa
;
759 if (idev
->cnf
.forwarding
)
760 dev_disable_lro(dev
);
761 if (dev
->flags
& IFF_MULTICAST
) {
762 if (idev
->cnf
.forwarding
) {
763 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
764 ipv6_dev_mc_inc(dev
, &in6addr_interfacelocal_allrouters
);
765 ipv6_dev_mc_inc(dev
, &in6addr_sitelocal_allrouters
);
767 ipv6_dev_mc_dec(dev
, &in6addr_linklocal_allrouters
);
768 ipv6_dev_mc_dec(dev
, &in6addr_interfacelocal_allrouters
);
769 ipv6_dev_mc_dec(dev
, &in6addr_sitelocal_allrouters
);
773 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
774 if (ifa
->flags
&IFA_F_TENTATIVE
)
776 if (idev
->cnf
.forwarding
)
777 addrconf_join_anycast(ifa
);
779 addrconf_leave_anycast(ifa
);
781 inet6_netconf_notify_devconf(dev_net(dev
), RTM_NEWNETCONF
,
783 dev
->ifindex
, &idev
->cnf
);
787 static void addrconf_forward_change(struct net
*net
, __s32 newf
)
789 struct net_device
*dev
;
790 struct inet6_dev
*idev
;
792 for_each_netdev(net
, dev
) {
793 idev
= __in6_dev_get(dev
);
795 int changed
= (!idev
->cnf
.forwarding
) ^ (!newf
);
796 idev
->cnf
.forwarding
= newf
;
798 dev_forward_change(idev
);
803 static int addrconf_fixup_forwarding(struct ctl_table
*table
, int *p
, int newf
)
809 return restart_syscall();
811 net
= (struct net
*)table
->extra2
;
815 if (p
== &net
->ipv6
.devconf_dflt
->forwarding
) {
816 if ((!newf
) ^ (!old
))
817 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
819 NETCONFA_IFINDEX_DEFAULT
,
820 net
->ipv6
.devconf_dflt
);
825 if (p
== &net
->ipv6
.devconf_all
->forwarding
) {
826 int old_dflt
= net
->ipv6
.devconf_dflt
->forwarding
;
828 net
->ipv6
.devconf_dflt
->forwarding
= newf
;
829 if ((!newf
) ^ (!old_dflt
))
830 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
832 NETCONFA_IFINDEX_DEFAULT
,
833 net
->ipv6
.devconf_dflt
);
835 addrconf_forward_change(net
, newf
);
836 if ((!newf
) ^ (!old
))
837 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
839 NETCONFA_IFINDEX_ALL
,
840 net
->ipv6
.devconf_all
);
841 } else if ((!newf
) ^ (!old
))
842 dev_forward_change((struct inet6_dev
*)table
->extra1
);
846 rt6_purge_dflt_routers(net
);
850 static void addrconf_linkdown_change(struct net
*net
, __s32 newf
)
852 struct net_device
*dev
;
853 struct inet6_dev
*idev
;
855 for_each_netdev(net
, dev
) {
856 idev
= __in6_dev_get(dev
);
858 int changed
= (!idev
->cnf
.ignore_routes_with_linkdown
) ^ (!newf
);
860 idev
->cnf
.ignore_routes_with_linkdown
= newf
;
862 inet6_netconf_notify_devconf(dev_net(dev
),
864 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
,
871 static int addrconf_fixup_linkdown(struct ctl_table
*table
, int *p
, int newf
)
877 return restart_syscall();
879 net
= (struct net
*)table
->extra2
;
883 if (p
== &net
->ipv6
.devconf_dflt
->ignore_routes_with_linkdown
) {
884 if ((!newf
) ^ (!old
))
885 inet6_netconf_notify_devconf(net
,
887 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
,
888 NETCONFA_IFINDEX_DEFAULT
,
889 net
->ipv6
.devconf_dflt
);
894 if (p
== &net
->ipv6
.devconf_all
->ignore_routes_with_linkdown
) {
895 net
->ipv6
.devconf_dflt
->ignore_routes_with_linkdown
= newf
;
896 addrconf_linkdown_change(net
, newf
);
897 if ((!newf
) ^ (!old
))
898 inet6_netconf_notify_devconf(net
,
900 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
,
901 NETCONFA_IFINDEX_ALL
,
902 net
->ipv6
.devconf_all
);
911 /* Nobody refers to this ifaddr, destroy it */
912 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
914 WARN_ON(!hlist_unhashed(&ifp
->addr_lst
));
916 #ifdef NET_REFCNT_DEBUG
917 pr_debug("%s\n", __func__
);
920 in6_dev_put(ifp
->idev
);
922 if (cancel_delayed_work(&ifp
->dad_work
))
923 pr_notice("delayed DAD work was pending while freeing ifa=%p\n",
926 if (ifp
->state
!= INET6_IFADDR_STATE_DEAD
) {
927 pr_warn("Freeing alive inet6 address %p\n", ifp
);
936 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
939 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
942 * Each device address list is sorted in order of scope -
943 * global before linklocal.
945 list_for_each(p
, &idev
->addr_list
) {
946 struct inet6_ifaddr
*ifa
947 = list_entry(p
, struct inet6_ifaddr
, if_list
);
948 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
952 list_add_tail_rcu(&ifp
->if_list
, p
);
955 static u32
inet6_addr_hash(const struct net
*net
, const struct in6_addr
*addr
)
957 u32 val
= ipv6_addr_hash(addr
) ^ net_hash_mix(net
);
959 return hash_32(val
, IN6_ADDR_HSIZE_SHIFT
);
962 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
963 struct net_device
*dev
, unsigned int hash
)
965 struct inet6_ifaddr
*ifp
;
967 hlist_for_each_entry(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
968 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
970 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
971 if (!dev
|| ifp
->idev
->dev
== dev
)
978 static int ipv6_add_addr_hash(struct net_device
*dev
, struct inet6_ifaddr
*ifa
)
980 unsigned int hash
= inet6_addr_hash(dev_net(dev
), &ifa
->addr
);
983 spin_lock(&addrconf_hash_lock
);
985 /* Ignore adding duplicate addresses on an interface */
986 if (ipv6_chk_same_addr(dev_net(dev
), &ifa
->addr
, dev
, hash
)) {
987 ADBG("ipv6_add_addr: already assigned\n");
990 hlist_add_head_rcu(&ifa
->addr_lst
, &inet6_addr_lst
[hash
]);
993 spin_unlock(&addrconf_hash_lock
);
998 /* On success it returns ifp with increased reference count */
1000 static struct inet6_ifaddr
*
1001 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
1002 const struct in6_addr
*peer_addr
, int pfxlen
,
1003 int scope
, u32 flags
, u32 valid_lft
, u32 prefered_lft
,
1004 bool can_block
, struct netlink_ext_ack
*extack
)
1006 gfp_t gfp_flags
= can_block
? GFP_KERNEL
: GFP_ATOMIC
;
1007 struct net
*net
= dev_net(idev
->dev
);
1008 struct inet6_ifaddr
*ifa
= NULL
;
1009 struct rt6_info
*rt
= NULL
;
1011 int addr_type
= ipv6_addr_type(addr
);
1013 if (addr_type
== IPV6_ADDR_ANY
||
1014 addr_type
& IPV6_ADDR_MULTICAST
||
1015 (!(idev
->dev
->flags
& IFF_LOOPBACK
) &&
1016 addr_type
& IPV6_ADDR_LOOPBACK
))
1017 return ERR_PTR(-EADDRNOTAVAIL
);
1020 err
= -ENODEV
; /*XXX*/
1024 if (idev
->cnf
.disable_ipv6
) {
1029 /* validator notifier needs to be blocking;
1030 * do not call in atomic context
1033 struct in6_validator_info i6vi
= {
1039 err
= inet6addr_validator_notifier_call_chain(NETDEV_UP
, &i6vi
);
1040 err
= notifier_to_errno(err
);
1045 ifa
= kzalloc(sizeof(*ifa
), gfp_flags
);
1047 ADBG("ipv6_add_addr: malloc failed\n");
1052 rt
= addrconf_dst_alloc(idev
, addr
, false);
1059 if (net
->ipv6
.devconf_all
->disable_policy
||
1060 idev
->cnf
.disable_policy
)
1061 rt
->dst
.flags
|= DST_NOPOLICY
;
1063 neigh_parms_data_state_setall(idev
->nd_parms
);
1067 ifa
->peer_addr
= *peer_addr
;
1069 spin_lock_init(&ifa
->lock
);
1070 INIT_DELAYED_WORK(&ifa
->dad_work
, addrconf_dad_work
);
1071 INIT_HLIST_NODE(&ifa
->addr_lst
);
1073 ifa
->prefix_len
= pfxlen
;
1075 /* No need to add the TENTATIVE flag for addresses with NODAD */
1076 if (!(flags
& IFA_F_NODAD
))
1077 ifa
->flags
|= IFA_F_TENTATIVE
;
1078 ifa
->valid_lft
= valid_lft
;
1079 ifa
->prefered_lft
= prefered_lft
;
1080 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
1081 ifa
->tokenized
= false;
1089 refcount_set(&ifa
->refcnt
, 1);
1093 err
= ipv6_add_addr_hash(idev
->dev
, ifa
);
1095 rcu_read_unlock_bh();
1099 write_lock(&idev
->lock
);
1101 /* Add to inet6_dev unicast addr list. */
1102 ipv6_link_dev_addr(idev
, ifa
);
1104 if (ifa
->flags
&IFA_F_TEMPORARY
) {
1105 list_add(&ifa
->tmp_list
, &idev
->tempaddr_list
);
1110 write_unlock(&idev
->lock
);
1112 rcu_read_unlock_bh();
1114 inet6addr_notifier_call_chain(NETDEV_UP
, ifa
);
1116 if (unlikely(err
< 0)) {
1121 in6_dev_put(ifa
->idev
);
1130 enum cleanup_prefix_rt_t
{
1131 CLEANUP_PREFIX_RT_NOP
, /* no cleanup action for prefix route */
1132 CLEANUP_PREFIX_RT_DEL
, /* delete the prefix route */
1133 CLEANUP_PREFIX_RT_EXPIRE
, /* update the lifetime of the prefix route */
1137 * Check, whether the prefix for ifp would still need a prefix route
1138 * after deleting ifp. The function returns one of the CLEANUP_PREFIX_RT_*
1141 * 1) we don't purge prefix if address was not permanent.
1142 * prefix is managed by its own lifetime.
1143 * 2) we also don't purge, if the address was IFA_F_NOPREFIXROUTE.
1144 * 3) if there are no addresses, delete prefix.
1145 * 4) if there are still other permanent address(es),
1146 * corresponding prefix is still permanent.
1147 * 5) if there are still other addresses with IFA_F_NOPREFIXROUTE,
1148 * don't purge the prefix, assume user space is managing it.
1149 * 6) otherwise, update prefix lifetime to the
1150 * longest valid lifetime among the corresponding
1151 * addresses on the device.
1152 * Note: subsequent RA will update lifetime.
1154 static enum cleanup_prefix_rt_t
1155 check_cleanup_prefix_route(struct inet6_ifaddr
*ifp
, unsigned long *expires
)
1157 struct inet6_ifaddr
*ifa
;
1158 struct inet6_dev
*idev
= ifp
->idev
;
1159 unsigned long lifetime
;
1160 enum cleanup_prefix_rt_t action
= CLEANUP_PREFIX_RT_DEL
;
1164 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
1167 if (!ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
1170 if (ifa
->flags
& (IFA_F_PERMANENT
| IFA_F_NOPREFIXROUTE
))
1171 return CLEANUP_PREFIX_RT_NOP
;
1173 action
= CLEANUP_PREFIX_RT_EXPIRE
;
1175 spin_lock(&ifa
->lock
);
1177 lifetime
= addrconf_timeout_fixup(ifa
->valid_lft
, HZ
);
1179 * Note: Because this address is
1180 * not permanent, lifetime <
1181 * LONG_MAX / HZ here.
1183 if (time_before(*expires
, ifa
->tstamp
+ lifetime
* HZ
))
1184 *expires
= ifa
->tstamp
+ lifetime
* HZ
;
1185 spin_unlock(&ifa
->lock
);
1192 cleanup_prefix_route(struct inet6_ifaddr
*ifp
, unsigned long expires
, bool del_rt
)
1194 struct rt6_info
*rt
;
1196 rt
= addrconf_get_prefix_route(&ifp
->addr
,
1199 0, RTF_GATEWAY
| RTF_DEFAULT
);
1204 if (!(rt
->rt6i_flags
& RTF_EXPIRES
))
1205 rt6_set_expires(rt
, expires
);
1212 /* This function wants to get referenced ifp and releases it before return */
1214 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
1217 enum cleanup_prefix_rt_t action
= CLEANUP_PREFIX_RT_NOP
;
1218 unsigned long expires
;
1222 spin_lock_bh(&ifp
->lock
);
1224 ifp
->state
= INET6_IFADDR_STATE_DEAD
;
1225 spin_unlock_bh(&ifp
->lock
);
1227 if (state
== INET6_IFADDR_STATE_DEAD
)
1230 spin_lock_bh(&addrconf_hash_lock
);
1231 hlist_del_init_rcu(&ifp
->addr_lst
);
1232 spin_unlock_bh(&addrconf_hash_lock
);
1234 write_lock_bh(&ifp
->idev
->lock
);
1236 if (ifp
->flags
&IFA_F_TEMPORARY
) {
1237 list_del(&ifp
->tmp_list
);
1239 in6_ifa_put(ifp
->ifpub
);
1245 if (ifp
->flags
& IFA_F_PERMANENT
&& !(ifp
->flags
& IFA_F_NOPREFIXROUTE
))
1246 action
= check_cleanup_prefix_route(ifp
, &expires
);
1248 list_del_rcu(&ifp
->if_list
);
1251 write_unlock_bh(&ifp
->idev
->lock
);
1253 addrconf_del_dad_work(ifp
);
1255 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
1257 inet6addr_notifier_call_chain(NETDEV_DOWN
, ifp
);
1259 if (action
!= CLEANUP_PREFIX_RT_NOP
) {
1260 cleanup_prefix_route(ifp
, expires
,
1261 action
== CLEANUP_PREFIX_RT_DEL
);
1264 /* clean up prefsrc entries */
1265 rt6_remove_prefsrc(ifp
);
1270 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
,
1271 struct inet6_ifaddr
*ift
,
1274 struct inet6_dev
*idev
= ifp
->idev
;
1275 struct in6_addr addr
, *tmpaddr
;
1276 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_tstamp
, age
;
1277 unsigned long regen_advance
;
1281 unsigned long now
= jiffies
;
1282 long max_desync_factor
;
1283 s32 cnf_temp_preferred_lft
;
1285 write_lock_bh(&idev
->lock
);
1287 spin_lock_bh(&ift
->lock
);
1288 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
1289 spin_unlock_bh(&ift
->lock
);
1296 if (idev
->cnf
.use_tempaddr
<= 0) {
1297 write_unlock_bh(&idev
->lock
);
1298 pr_info("%s: use_tempaddr is disabled\n", __func__
);
1303 spin_lock_bh(&ifp
->lock
);
1304 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
1305 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
1306 spin_unlock_bh(&ifp
->lock
);
1307 write_unlock_bh(&idev
->lock
);
1308 pr_warn("%s: regeneration time exceeded - disabled temporary address support\n",
1315 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
1316 ipv6_try_regen_rndid(idev
, tmpaddr
);
1317 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
1318 age
= (now
- ifp
->tstamp
) / HZ
;
1320 regen_advance
= idev
->cnf
.regen_max_retry
*
1321 idev
->cnf
.dad_transmits
*
1322 NEIGH_VAR(idev
->nd_parms
, RETRANS_TIME
) / HZ
;
1324 /* recalculate max_desync_factor each time and update
1325 * idev->desync_factor if it's larger
1327 cnf_temp_preferred_lft
= READ_ONCE(idev
->cnf
.temp_prefered_lft
);
1328 max_desync_factor
= min_t(__u32
,
1329 idev
->cnf
.max_desync_factor
,
1330 cnf_temp_preferred_lft
- regen_advance
);
1332 if (unlikely(idev
->desync_factor
> max_desync_factor
)) {
1333 if (max_desync_factor
> 0) {
1334 get_random_bytes(&idev
->desync_factor
,
1335 sizeof(idev
->desync_factor
));
1336 idev
->desync_factor
%= max_desync_factor
;
1338 idev
->desync_factor
= 0;
1342 tmp_valid_lft
= min_t(__u32
,
1344 idev
->cnf
.temp_valid_lft
+ age
);
1345 tmp_prefered_lft
= cnf_temp_preferred_lft
+ age
-
1346 idev
->desync_factor
;
1347 tmp_prefered_lft
= min_t(__u32
, ifp
->prefered_lft
, tmp_prefered_lft
);
1348 tmp_plen
= ifp
->prefix_len
;
1349 tmp_tstamp
= ifp
->tstamp
;
1350 spin_unlock_bh(&ifp
->lock
);
1352 write_unlock_bh(&idev
->lock
);
1354 /* A temporary address is created only if this calculated Preferred
1355 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
1356 * an implementation must not create a temporary address with a zero
1357 * Preferred Lifetime.
1358 * Use age calculation as in addrconf_verify to avoid unnecessary
1359 * temporary addresses being generated.
1361 age
= (now
- tmp_tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
1362 if (tmp_prefered_lft
<= regen_advance
+ age
) {
1369 addr_flags
= IFA_F_TEMPORARY
;
1370 /* set in addrconf_prefix_rcv() */
1371 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
1372 addr_flags
|= IFA_F_OPTIMISTIC
;
1374 ift
= ipv6_add_addr(idev
, &addr
, NULL
, tmp_plen
,
1375 ipv6_addr_scope(&addr
), addr_flags
,
1376 tmp_valid_lft
, tmp_prefered_lft
, block
, NULL
);
1380 pr_info("%s: retry temporary address regeneration\n", __func__
);
1382 write_lock_bh(&idev
->lock
);
1386 spin_lock_bh(&ift
->lock
);
1389 ift
->tstamp
= tmp_tstamp
;
1390 spin_unlock_bh(&ift
->lock
);
1392 addrconf_dad_start(ift
);
1400 * Choose an appropriate source address (RFC3484)
1403 IPV6_SADDR_RULE_INIT
= 0,
1404 IPV6_SADDR_RULE_LOCAL
,
1405 IPV6_SADDR_RULE_SCOPE
,
1406 IPV6_SADDR_RULE_PREFERRED
,
1407 #ifdef CONFIG_IPV6_MIP6
1408 IPV6_SADDR_RULE_HOA
,
1410 IPV6_SADDR_RULE_OIF
,
1411 IPV6_SADDR_RULE_LABEL
,
1412 IPV6_SADDR_RULE_PRIVACY
,
1413 IPV6_SADDR_RULE_ORCHID
,
1414 IPV6_SADDR_RULE_PREFIX
,
1415 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1416 IPV6_SADDR_RULE_NOT_OPTIMISTIC
,
1421 struct ipv6_saddr_score
{
1424 struct inet6_ifaddr
*ifa
;
1425 DECLARE_BITMAP(scorebits
, IPV6_SADDR_RULE_MAX
);
1430 struct ipv6_saddr_dst
{
1431 const struct in6_addr
*addr
;
1438 static inline int ipv6_saddr_preferred(int type
)
1440 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|IPV6_ADDR_LOOPBACK
))
1445 static bool ipv6_use_optimistic_addr(struct net
*net
,
1446 struct inet6_dev
*idev
)
1448 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1451 if (!net
->ipv6
.devconf_all
->optimistic_dad
&& !idev
->cnf
.optimistic_dad
)
1453 if (!net
->ipv6
.devconf_all
->use_optimistic
&& !idev
->cnf
.use_optimistic
)
1462 static int ipv6_get_saddr_eval(struct net
*net
,
1463 struct ipv6_saddr_score
*score
,
1464 struct ipv6_saddr_dst
*dst
,
1469 if (i
<= score
->rule
) {
1471 case IPV6_SADDR_RULE_SCOPE
:
1472 ret
= score
->scopedist
;
1474 case IPV6_SADDR_RULE_PREFIX
:
1475 ret
= score
->matchlen
;
1478 ret
= !!test_bit(i
, score
->scorebits
);
1484 case IPV6_SADDR_RULE_INIT
:
1485 /* Rule 0: remember if hiscore is not ready yet */
1488 case IPV6_SADDR_RULE_LOCAL
:
1489 /* Rule 1: Prefer same address */
1490 ret
= ipv6_addr_equal(&score
->ifa
->addr
, dst
->addr
);
1492 case IPV6_SADDR_RULE_SCOPE
:
1493 /* Rule 2: Prefer appropriate scope
1498 * ---+--+-+---> scope
1500 * | d is scope of the destination.
1502 * | \ <- smaller scope is better if
1503 * B-15 | \ if scope is enough for destination.
1504 * | ret = B - scope (-1 <= scope >= d <= 15).
1506 * |/ <- greater is better
1507 * -C / if scope is not enough for destination.
1508 * /| ret = scope - C (-1 <= d < scope <= 15).
1510 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1511 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1512 * Assume B = 0 and we get C > 29.
1514 ret
= __ipv6_addr_src_scope(score
->addr_type
);
1515 if (ret
>= dst
->scope
)
1518 ret
-= 128; /* 30 is enough */
1519 score
->scopedist
= ret
;
1521 case IPV6_SADDR_RULE_PREFERRED
:
1523 /* Rule 3: Avoid deprecated and optimistic addresses */
1524 u8 avoid
= IFA_F_DEPRECATED
;
1526 if (!ipv6_use_optimistic_addr(net
, score
->ifa
->idev
))
1527 avoid
|= IFA_F_OPTIMISTIC
;
1528 ret
= ipv6_saddr_preferred(score
->addr_type
) ||
1529 !(score
->ifa
->flags
& avoid
);
1532 #ifdef CONFIG_IPV6_MIP6
1533 case IPV6_SADDR_RULE_HOA
:
1535 /* Rule 4: Prefer home address */
1536 int prefhome
= !(dst
->prefs
& IPV6_PREFER_SRC_COA
);
1537 ret
= !(score
->ifa
->flags
& IFA_F_HOMEADDRESS
) ^ prefhome
;
1541 case IPV6_SADDR_RULE_OIF
:
1542 /* Rule 5: Prefer outgoing interface */
1543 ret
= (!dst
->ifindex
||
1544 dst
->ifindex
== score
->ifa
->idev
->dev
->ifindex
);
1546 case IPV6_SADDR_RULE_LABEL
:
1547 /* Rule 6: Prefer matching label */
1548 ret
= ipv6_addr_label(net
,
1549 &score
->ifa
->addr
, score
->addr_type
,
1550 score
->ifa
->idev
->dev
->ifindex
) == dst
->label
;
1552 case IPV6_SADDR_RULE_PRIVACY
:
1554 /* Rule 7: Prefer public address
1555 * Note: prefer temporary address if use_tempaddr >= 2
1557 int preftmp
= dst
->prefs
& (IPV6_PREFER_SRC_PUBLIC
|IPV6_PREFER_SRC_TMP
) ?
1558 !!(dst
->prefs
& IPV6_PREFER_SRC_TMP
) :
1559 score
->ifa
->idev
->cnf
.use_tempaddr
>= 2;
1560 ret
= (!(score
->ifa
->flags
& IFA_F_TEMPORARY
)) ^ preftmp
;
1563 case IPV6_SADDR_RULE_ORCHID
:
1564 /* Rule 8-: Prefer ORCHID vs ORCHID or
1565 * non-ORCHID vs non-ORCHID
1567 ret
= !(ipv6_addr_orchid(&score
->ifa
->addr
) ^
1568 ipv6_addr_orchid(dst
->addr
));
1570 case IPV6_SADDR_RULE_PREFIX
:
1571 /* Rule 8: Use longest matching prefix */
1572 ret
= ipv6_addr_diff(&score
->ifa
->addr
, dst
->addr
);
1573 if (ret
> score
->ifa
->prefix_len
)
1574 ret
= score
->ifa
->prefix_len
;
1575 score
->matchlen
= ret
;
1577 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1578 case IPV6_SADDR_RULE_NOT_OPTIMISTIC
:
1579 /* Optimistic addresses still have lower precedence than other
1580 * preferred addresses.
1582 ret
= !(score
->ifa
->flags
& IFA_F_OPTIMISTIC
);
1590 __set_bit(i
, score
->scorebits
);
1596 static int __ipv6_dev_get_saddr(struct net
*net
,
1597 struct ipv6_saddr_dst
*dst
,
1598 struct inet6_dev
*idev
,
1599 struct ipv6_saddr_score
*scores
,
1602 struct ipv6_saddr_score
*score
= &scores
[1 - hiscore_idx
], *hiscore
= &scores
[hiscore_idx
];
1604 list_for_each_entry_rcu(score
->ifa
, &idev
->addr_list
, if_list
) {
1608 * - Tentative Address (RFC2462 section 5.4)
1609 * - A tentative address is not considered
1610 * "assigned to an interface" in the traditional
1611 * sense, unless it is also flagged as optimistic.
1612 * - Candidate Source Address (section 4)
1613 * - In any case, anycast addresses, multicast
1614 * addresses, and the unspecified address MUST
1615 * NOT be included in a candidate set.
1617 if ((score
->ifa
->flags
& IFA_F_TENTATIVE
) &&
1618 (!(score
->ifa
->flags
& IFA_F_OPTIMISTIC
)))
1621 score
->addr_type
= __ipv6_addr_type(&score
->ifa
->addr
);
1623 if (unlikely(score
->addr_type
== IPV6_ADDR_ANY
||
1624 score
->addr_type
& IPV6_ADDR_MULTICAST
)) {
1625 net_dbg_ratelimited("ADDRCONF: unspecified / multicast address assigned as unicast address on %s",
1631 bitmap_zero(score
->scorebits
, IPV6_SADDR_RULE_MAX
);
1633 for (i
= 0; i
< IPV6_SADDR_RULE_MAX
; i
++) {
1634 int minihiscore
, miniscore
;
1636 minihiscore
= ipv6_get_saddr_eval(net
, hiscore
, dst
, i
);
1637 miniscore
= ipv6_get_saddr_eval(net
, score
, dst
, i
);
1639 if (minihiscore
> miniscore
) {
1640 if (i
== IPV6_SADDR_RULE_SCOPE
&&
1641 score
->scopedist
> 0) {
1644 * each remaining entry
1645 * has too small (not enough)
1646 * scope, because ifa entries
1647 * are sorted by their scope
1653 } else if (minihiscore
< miniscore
) {
1654 swap(hiscore
, score
);
1655 hiscore_idx
= 1 - hiscore_idx
;
1657 /* restore our iterator */
1658 score
->ifa
= hiscore
->ifa
;
1668 static int ipv6_get_saddr_master(struct net
*net
,
1669 const struct net_device
*dst_dev
,
1670 const struct net_device
*master
,
1671 struct ipv6_saddr_dst
*dst
,
1672 struct ipv6_saddr_score
*scores
,
1675 struct inet6_dev
*idev
;
1677 idev
= __in6_dev_get(dst_dev
);
1679 hiscore_idx
= __ipv6_dev_get_saddr(net
, dst
, idev
,
1680 scores
, hiscore_idx
);
1682 idev
= __in6_dev_get(master
);
1684 hiscore_idx
= __ipv6_dev_get_saddr(net
, dst
, idev
,
1685 scores
, hiscore_idx
);
1690 int ipv6_dev_get_saddr(struct net
*net
, const struct net_device
*dst_dev
,
1691 const struct in6_addr
*daddr
, unsigned int prefs
,
1692 struct in6_addr
*saddr
)
1694 struct ipv6_saddr_score scores
[2], *hiscore
;
1695 struct ipv6_saddr_dst dst
;
1696 struct inet6_dev
*idev
;
1697 struct net_device
*dev
;
1699 bool use_oif_addr
= false;
1700 int hiscore_idx
= 0;
1703 dst_type
= __ipv6_addr_type(daddr
);
1705 dst
.ifindex
= dst_dev
? dst_dev
->ifindex
: 0;
1706 dst
.scope
= __ipv6_addr_src_scope(dst_type
);
1707 dst
.label
= ipv6_addr_label(net
, daddr
, dst_type
, dst
.ifindex
);
1710 scores
[hiscore_idx
].rule
= -1;
1711 scores
[hiscore_idx
].ifa
= NULL
;
1715 /* Candidate Source Address (section 4)
1716 * - multicast and link-local destination address,
1717 * the set of candidate source address MUST only
1718 * include addresses assigned to interfaces
1719 * belonging to the same link as the outgoing
1721 * (- For site-local destination addresses, the
1722 * set of candidate source addresses MUST only
1723 * include addresses assigned to interfaces
1724 * belonging to the same site as the outgoing
1726 * - "It is RECOMMENDED that the candidate source addresses
1727 * be the set of unicast addresses assigned to the
1728 * interface that will be used to send to the destination
1729 * (the 'outgoing' interface)." (RFC 6724)
1732 idev
= __in6_dev_get(dst_dev
);
1733 if ((dst_type
& IPV6_ADDR_MULTICAST
) ||
1734 dst
.scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
||
1735 (idev
&& idev
->cnf
.use_oif_addrs_only
)) {
1736 use_oif_addr
= true;
1742 hiscore_idx
= __ipv6_dev_get_saddr(net
, &dst
, idev
, scores
, hiscore_idx
);
1744 const struct net_device
*master
;
1747 /* if dst_dev exists and is enslaved to an L3 device, then
1748 * prefer addresses from dst_dev and then the master over
1749 * any other enslaved devices in the L3 domain.
1751 master
= l3mdev_master_dev_rcu(dst_dev
);
1753 master_idx
= master
->ifindex
;
1755 hiscore_idx
= ipv6_get_saddr_master(net
, dst_dev
,
1757 scores
, hiscore_idx
);
1759 if (scores
[hiscore_idx
].ifa
)
1763 for_each_netdev_rcu(net
, dev
) {
1764 /* only consider addresses on devices in the
1767 if (l3mdev_master_ifindex_rcu(dev
) != master_idx
)
1769 idev
= __in6_dev_get(dev
);
1772 hiscore_idx
= __ipv6_dev_get_saddr(net
, &dst
, idev
, scores
, hiscore_idx
);
1777 hiscore
= &scores
[hiscore_idx
];
1779 ret
= -EADDRNOTAVAIL
;
1781 *saddr
= hiscore
->ifa
->addr
;
1786 EXPORT_SYMBOL(ipv6_dev_get_saddr
);
1788 int __ipv6_get_lladdr(struct inet6_dev
*idev
, struct in6_addr
*addr
,
1791 struct inet6_ifaddr
*ifp
;
1792 int err
= -EADDRNOTAVAIL
;
1794 list_for_each_entry_reverse(ifp
, &idev
->addr_list
, if_list
) {
1795 if (ifp
->scope
> IFA_LINK
)
1797 if (ifp
->scope
== IFA_LINK
&&
1798 !(ifp
->flags
& banned_flags
)) {
1807 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1810 struct inet6_dev
*idev
;
1811 int err
= -EADDRNOTAVAIL
;
1814 idev
= __in6_dev_get(dev
);
1816 read_lock_bh(&idev
->lock
);
1817 err
= __ipv6_get_lladdr(idev
, addr
, banned_flags
);
1818 read_unlock_bh(&idev
->lock
);
1824 static int ipv6_count_addresses(const struct inet6_dev
*idev
)
1826 const struct inet6_ifaddr
*ifp
;
1830 list_for_each_entry_rcu(ifp
, &idev
->addr_list
, if_list
)
1836 int ipv6_chk_addr(struct net
*net
, const struct in6_addr
*addr
,
1837 const struct net_device
*dev
, int strict
)
1839 return ipv6_chk_addr_and_flags(net
, addr
, dev
, strict
, IFA_F_TENTATIVE
);
1841 EXPORT_SYMBOL(ipv6_chk_addr
);
1843 int ipv6_chk_addr_and_flags(struct net
*net
, const struct in6_addr
*addr
,
1844 const struct net_device
*dev
, int strict
,
1847 unsigned int hash
= inet6_addr_hash(net
, addr
);
1848 struct inet6_ifaddr
*ifp
;
1852 hlist_for_each_entry_rcu(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1853 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1855 /* Decouple optimistic from tentative for evaluation here.
1856 * Ban optimistic addresses explicitly, when required.
1858 ifp_flags
= (ifp
->flags
&IFA_F_OPTIMISTIC
)
1859 ? (ifp
->flags
&~IFA_F_TENTATIVE
)
1861 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1862 !(ifp_flags
&banned_flags
) &&
1863 (!dev
|| ifp
->idev
->dev
== dev
||
1864 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))) {
1873 EXPORT_SYMBOL(ipv6_chk_addr_and_flags
);
1876 /* Compares an address/prefix_len with addresses on device @dev.
1877 * If one is found it returns true.
1879 bool ipv6_chk_custom_prefix(const struct in6_addr
*addr
,
1880 const unsigned int prefix_len
, struct net_device
*dev
)
1882 const struct inet6_ifaddr
*ifa
;
1883 const struct inet6_dev
*idev
;
1887 idev
= __in6_dev_get(dev
);
1889 list_for_each_entry_rcu(ifa
, &idev
->addr_list
, if_list
) {
1890 ret
= ipv6_prefix_equal(addr
, &ifa
->addr
, prefix_len
);
1899 EXPORT_SYMBOL(ipv6_chk_custom_prefix
);
1901 int ipv6_chk_prefix(const struct in6_addr
*addr
, struct net_device
*dev
)
1903 const struct inet6_ifaddr
*ifa
;
1904 const struct inet6_dev
*idev
;
1909 idev
= __in6_dev_get(dev
);
1911 list_for_each_entry_rcu(ifa
, &idev
->addr_list
, if_list
) {
1912 onlink
= ipv6_prefix_equal(addr
, &ifa
->addr
,
1921 EXPORT_SYMBOL(ipv6_chk_prefix
);
1923 struct inet6_ifaddr
*ipv6_get_ifaddr(struct net
*net
, const struct in6_addr
*addr
,
1924 struct net_device
*dev
, int strict
)
1926 unsigned int hash
= inet6_addr_hash(net
, addr
);
1927 struct inet6_ifaddr
*ifp
, *result
= NULL
;
1930 hlist_for_each_entry_rcu(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1931 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1933 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1934 if (!dev
|| ifp
->idev
->dev
== dev
||
1935 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1947 /* Gets referenced address, destroys ifaddr */
1949 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
, int dad_failed
)
1952 ifp
->flags
|= IFA_F_DADFAILED
;
1954 if (ifp
->flags
&IFA_F_TEMPORARY
) {
1955 struct inet6_ifaddr
*ifpub
;
1956 spin_lock_bh(&ifp
->lock
);
1959 in6_ifa_hold(ifpub
);
1960 spin_unlock_bh(&ifp
->lock
);
1961 ipv6_create_tempaddr(ifpub
, ifp
, true);
1964 spin_unlock_bh(&ifp
->lock
);
1967 } else if (ifp
->flags
&IFA_F_PERMANENT
|| !dad_failed
) {
1968 spin_lock_bh(&ifp
->lock
);
1969 addrconf_del_dad_work(ifp
);
1970 ifp
->flags
|= IFA_F_TENTATIVE
;
1971 spin_unlock_bh(&ifp
->lock
);
1973 ipv6_ifa_notify(0, ifp
);
1980 static int addrconf_dad_end(struct inet6_ifaddr
*ifp
)
1984 spin_lock_bh(&ifp
->lock
);
1985 if (ifp
->state
== INET6_IFADDR_STATE_DAD
) {
1986 ifp
->state
= INET6_IFADDR_STATE_POSTDAD
;
1989 spin_unlock_bh(&ifp
->lock
);
1994 void addrconf_dad_failure(struct sk_buff
*skb
, struct inet6_ifaddr
*ifp
)
1996 struct inet6_dev
*idev
= ifp
->idev
;
1997 struct net
*net
= dev_net(ifp
->idev
->dev
);
1999 if (addrconf_dad_end(ifp
)) {
2004 net_info_ratelimited("%s: IPv6 duplicate address %pI6c used by %pM detected!\n",
2005 ifp
->idev
->dev
->name
, &ifp
->addr
, eth_hdr(skb
)->h_source
);
2007 spin_lock_bh(&ifp
->lock
);
2009 if (ifp
->flags
& IFA_F_STABLE_PRIVACY
) {
2010 int scope
= ifp
->scope
;
2011 u32 flags
= ifp
->flags
;
2012 struct in6_addr new_addr
;
2013 struct inet6_ifaddr
*ifp2
;
2014 u32 valid_lft
, preferred_lft
;
2015 int pfxlen
= ifp
->prefix_len
;
2016 int retries
= ifp
->stable_privacy_retry
+ 1;
2018 if (retries
> net
->ipv6
.sysctl
.idgen_retries
) {
2019 net_info_ratelimited("%s: privacy stable address generation failed because of DAD conflicts!\n",
2020 ifp
->idev
->dev
->name
);
2024 new_addr
= ifp
->addr
;
2025 if (ipv6_generate_stable_address(&new_addr
, retries
,
2029 valid_lft
= ifp
->valid_lft
;
2030 preferred_lft
= ifp
->prefered_lft
;
2032 spin_unlock_bh(&ifp
->lock
);
2034 if (idev
->cnf
.max_addresses
&&
2035 ipv6_count_addresses(idev
) >=
2036 idev
->cnf
.max_addresses
)
2039 net_info_ratelimited("%s: generating new stable privacy address because of DAD conflict\n",
2040 ifp
->idev
->dev
->name
);
2042 ifp2
= ipv6_add_addr(idev
, &new_addr
, NULL
, pfxlen
,
2043 scope
, flags
, valid_lft
,
2044 preferred_lft
, false, NULL
);
2048 spin_lock_bh(&ifp2
->lock
);
2049 ifp2
->stable_privacy_retry
= retries
;
2050 ifp2
->state
= INET6_IFADDR_STATE_PREDAD
;
2051 spin_unlock_bh(&ifp2
->lock
);
2053 addrconf_mod_dad_work(ifp2
, net
->ipv6
.sysctl
.idgen_delay
);
2056 spin_lock_bh(&ifp
->lock
);
2060 /* transition from _POSTDAD to _ERRDAD */
2061 ifp
->state
= INET6_IFADDR_STATE_ERRDAD
;
2062 spin_unlock_bh(&ifp
->lock
);
2064 addrconf_mod_dad_work(ifp
, 0);
2068 /* Join to solicited addr multicast group.
2069 * caller must hold RTNL */
2070 void addrconf_join_solict(struct net_device
*dev
, const struct in6_addr
*addr
)
2072 struct in6_addr maddr
;
2074 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
2077 addrconf_addr_solict_mult(addr
, &maddr
);
2078 ipv6_dev_mc_inc(dev
, &maddr
);
2081 /* caller must hold RTNL */
2082 void addrconf_leave_solict(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
2084 struct in6_addr maddr
;
2086 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
2089 addrconf_addr_solict_mult(addr
, &maddr
);
2090 __ipv6_dev_mc_dec(idev
, &maddr
);
2093 /* caller must hold RTNL */
2094 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
2096 struct in6_addr addr
;
2098 if (ifp
->prefix_len
>= 127) /* RFC 6164 */
2100 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
2101 if (ipv6_addr_any(&addr
))
2103 __ipv6_dev_ac_inc(ifp
->idev
, &addr
);
2106 /* caller must hold RTNL */
2107 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
2109 struct in6_addr addr
;
2111 if (ifp
->prefix_len
>= 127) /* RFC 6164 */
2113 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
2114 if (ipv6_addr_any(&addr
))
2116 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
2119 static int addrconf_ifid_6lowpan(u8
*eui
, struct net_device
*dev
)
2121 switch (dev
->addr_len
) {
2123 memcpy(eui
, dev
->dev_addr
, 3);
2126 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
2128 case EUI64_ADDR_LEN
:
2129 memcpy(eui
, dev
->dev_addr
, EUI64_ADDR_LEN
);
2139 static int addrconf_ifid_ieee1394(u8
*eui
, struct net_device
*dev
)
2141 union fwnet_hwaddr
*ha
;
2143 if (dev
->addr_len
!= FWNET_ALEN
)
2146 ha
= (union fwnet_hwaddr
*)dev
->dev_addr
;
2148 memcpy(eui
, &ha
->uc
.uniq_id
, sizeof(ha
->uc
.uniq_id
));
2153 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
2155 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
2156 if (dev
->addr_len
!= ARCNET_ALEN
)
2159 eui
[7] = *(u8
*)dev
->dev_addr
;
2163 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
2165 if (dev
->addr_len
!= INFINIBAND_ALEN
)
2167 memcpy(eui
, dev
->dev_addr
+ 12, 8);
2172 static int __ipv6_isatap_ifid(u8
*eui
, __be32 addr
)
2176 eui
[0] = (ipv4_is_zeronet(addr
) || ipv4_is_private_10(addr
) ||
2177 ipv4_is_loopback(addr
) || ipv4_is_linklocal_169(addr
) ||
2178 ipv4_is_private_172(addr
) || ipv4_is_test_192(addr
) ||
2179 ipv4_is_anycast_6to4(addr
) || ipv4_is_private_192(addr
) ||
2180 ipv4_is_test_198(addr
) || ipv4_is_multicast(addr
) ||
2181 ipv4_is_lbcast(addr
)) ? 0x00 : 0x02;
2185 memcpy(eui
+ 4, &addr
, 4);
2189 static int addrconf_ifid_sit(u8
*eui
, struct net_device
*dev
)
2191 if (dev
->priv_flags
& IFF_ISATAP
)
2192 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
2196 static int addrconf_ifid_gre(u8
*eui
, struct net_device
*dev
)
2198 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
2201 static int addrconf_ifid_ip6tnl(u8
*eui
, struct net_device
*dev
)
2203 memcpy(eui
, dev
->perm_addr
, 3);
2204 memcpy(eui
+ 5, dev
->perm_addr
+ 3, 3);
2211 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
2213 switch (dev
->type
) {
2216 return addrconf_ifid_eui48(eui
, dev
);
2218 return addrconf_ifid_arcnet(eui
, dev
);
2219 case ARPHRD_INFINIBAND
:
2220 return addrconf_ifid_infiniband(eui
, dev
);
2222 return addrconf_ifid_sit(eui
, dev
);
2225 return addrconf_ifid_gre(eui
, dev
);
2226 case ARPHRD_6LOWPAN
:
2227 return addrconf_ifid_6lowpan(eui
, dev
);
2228 case ARPHRD_IEEE1394
:
2229 return addrconf_ifid_ieee1394(eui
, dev
);
2230 case ARPHRD_TUNNEL6
:
2232 return addrconf_ifid_ip6tnl(eui
, dev
);
2237 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
2240 struct inet6_ifaddr
*ifp
;
2242 read_lock_bh(&idev
->lock
);
2243 list_for_each_entry_reverse(ifp
, &idev
->addr_list
, if_list
) {
2244 if (ifp
->scope
> IFA_LINK
)
2246 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2247 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
2252 read_unlock_bh(&idev
->lock
);
2256 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
2257 static void ipv6_regen_rndid(struct inet6_dev
*idev
)
2260 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
2261 idev
->rndid
[0] &= ~0x02;
2264 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
2265 * check if generated address is not inappropriate
2267 * - Reserved subnet anycast (RFC 2526)
2268 * 11111101 11....11 1xxxxxxx
2269 * - ISATAP (RFC4214) 6.1
2270 * 00-00-5E-FE-xx-xx-xx-xx
2272 * - XXX: already assigned to an address on the device
2274 if (idev
->rndid
[0] == 0xfd &&
2275 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
2276 (idev
->rndid
[7]&0x80))
2278 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
2279 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
2281 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
2286 static void ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
)
2288 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
2289 ipv6_regen_rndid(idev
);
2297 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
2298 unsigned long expires
, u32 flags
)
2300 struct fib6_config cfg
= {
2301 .fc_table
= l3mdev_fib_table(dev
) ? : RT6_TABLE_PREFIX
,
2302 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
2303 .fc_ifindex
= dev
->ifindex
,
2304 .fc_expires
= expires
,
2306 .fc_flags
= RTF_UP
| flags
,
2307 .fc_nlinfo
.nl_net
= dev_net(dev
),
2308 .fc_protocol
= RTPROT_KERNEL
,
2313 /* Prevent useless cloning on PtP SIT.
2314 This thing is done here expecting that the whole
2315 class of non-broadcast devices need not cloning.
2317 #if IS_ENABLED(CONFIG_IPV6_SIT)
2318 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
2319 cfg
.fc_flags
|= RTF_NONEXTHOP
;
2322 ip6_route_add(&cfg
, NULL
);
2326 static struct rt6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
2328 const struct net_device
*dev
,
2329 u32 flags
, u32 noflags
)
2331 struct fib6_node
*fn
;
2332 struct rt6_info
*rt
= NULL
;
2333 struct fib6_table
*table
;
2334 u32 tb_id
= l3mdev_fib_table(dev
) ? : RT6_TABLE_PREFIX
;
2336 table
= fib6_get_table(dev_net(dev
), tb_id
);
2341 fn
= fib6_locate(&table
->tb6_root
, pfx
, plen
, NULL
, 0, true);
2345 for_each_fib6_node_rt_rcu(fn
) {
2346 if (rt
->dst
.dev
->ifindex
!= dev
->ifindex
)
2348 if ((rt
->rt6i_flags
& flags
) != flags
)
2350 if ((rt
->rt6i_flags
& noflags
) != 0)
2352 if (!dst_hold_safe(&rt
->dst
))
2362 /* Create "default" multicast route to the interface */
2364 static void addrconf_add_mroute(struct net_device
*dev
)
2366 struct fib6_config cfg
= {
2367 .fc_table
= l3mdev_fib_table(dev
) ? : RT6_TABLE_LOCAL
,
2368 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
2369 .fc_ifindex
= dev
->ifindex
,
2372 .fc_nlinfo
.nl_net
= dev_net(dev
),
2375 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
2377 ip6_route_add(&cfg
, NULL
);
2380 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
2382 struct inet6_dev
*idev
;
2386 idev
= ipv6_find_idev(dev
);
2388 return ERR_PTR(-ENOBUFS
);
2390 if (idev
->cnf
.disable_ipv6
)
2391 return ERR_PTR(-EACCES
);
2393 /* Add default multicast route */
2394 if (!(dev
->flags
& IFF_LOOPBACK
) && !netif_is_l3_master(dev
))
2395 addrconf_add_mroute(dev
);
2400 static void manage_tempaddrs(struct inet6_dev
*idev
,
2401 struct inet6_ifaddr
*ifp
,
2402 __u32 valid_lft
, __u32 prefered_lft
,
2403 bool create
, unsigned long now
)
2406 struct inet6_ifaddr
*ift
;
2408 read_lock_bh(&idev
->lock
);
2409 /* update all temporary addresses in the list */
2410 list_for_each_entry(ift
, &idev
->tempaddr_list
, tmp_list
) {
2411 int age
, max_valid
, max_prefered
;
2413 if (ifp
!= ift
->ifpub
)
2416 /* RFC 4941 section 3.3:
2417 * If a received option will extend the lifetime of a public
2418 * address, the lifetimes of temporary addresses should
2419 * be extended, subject to the overall constraint that no
2420 * temporary addresses should ever remain "valid" or "preferred"
2421 * for a time longer than (TEMP_VALID_LIFETIME) or
2422 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), respectively.
2424 age
= (now
- ift
->cstamp
) / HZ
;
2425 max_valid
= idev
->cnf
.temp_valid_lft
- age
;
2429 max_prefered
= idev
->cnf
.temp_prefered_lft
-
2430 idev
->desync_factor
- age
;
2431 if (max_prefered
< 0)
2434 if (valid_lft
> max_valid
)
2435 valid_lft
= max_valid
;
2437 if (prefered_lft
> max_prefered
)
2438 prefered_lft
= max_prefered
;
2440 spin_lock(&ift
->lock
);
2442 ift
->valid_lft
= valid_lft
;
2443 ift
->prefered_lft
= prefered_lft
;
2445 if (prefered_lft
> 0)
2446 ift
->flags
&= ~IFA_F_DEPRECATED
;
2448 spin_unlock(&ift
->lock
);
2449 if (!(flags
&IFA_F_TENTATIVE
))
2450 ipv6_ifa_notify(0, ift
);
2453 if ((create
|| list_empty(&idev
->tempaddr_list
)) &&
2454 idev
->cnf
.use_tempaddr
> 0) {
2455 /* When a new public address is created as described
2456 * in [ADDRCONF], also create a new temporary address.
2457 * Also create a temporary address if it's enabled but
2458 * no temporary address currently exists.
2460 read_unlock_bh(&idev
->lock
);
2461 ipv6_create_tempaddr(ifp
, NULL
, false);
2463 read_unlock_bh(&idev
->lock
);
2467 static bool is_addr_mode_generate_stable(struct inet6_dev
*idev
)
2469 return idev
->cnf
.addr_gen_mode
== IN6_ADDR_GEN_MODE_STABLE_PRIVACY
||
2470 idev
->cnf
.addr_gen_mode
== IN6_ADDR_GEN_MODE_RANDOM
;
2473 int addrconf_prefix_rcv_add_addr(struct net
*net
, struct net_device
*dev
,
2474 const struct prefix_info
*pinfo
,
2475 struct inet6_dev
*in6_dev
,
2476 const struct in6_addr
*addr
, int addr_type
,
2477 u32 addr_flags
, bool sllao
, bool tokenized
,
2478 __u32 valid_lft
, u32 prefered_lft
)
2480 struct inet6_ifaddr
*ifp
= ipv6_get_ifaddr(net
, addr
, dev
, 1);
2481 int create
= 0, update_lft
= 0;
2483 if (!ifp
&& valid_lft
) {
2484 int max_addresses
= in6_dev
->cnf
.max_addresses
;
2486 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2487 if ((net
->ipv6
.devconf_all
->optimistic_dad
||
2488 in6_dev
->cnf
.optimistic_dad
) &&
2489 !net
->ipv6
.devconf_all
->forwarding
&& sllao
)
2490 addr_flags
|= IFA_F_OPTIMISTIC
;
2493 /* Do not allow to create too much of autoconfigured
2494 * addresses; this would be too easy way to crash kernel.
2496 if (!max_addresses
||
2497 ipv6_count_addresses(in6_dev
) < max_addresses
)
2498 ifp
= ipv6_add_addr(in6_dev
, addr
, NULL
,
2500 addr_type
&IPV6_ADDR_SCOPE_MASK
,
2501 addr_flags
, valid_lft
,
2502 prefered_lft
, false, NULL
);
2504 if (IS_ERR_OR_NULL(ifp
))
2509 spin_lock_bh(&ifp
->lock
);
2510 ifp
->flags
|= IFA_F_MANAGETEMPADDR
;
2511 ifp
->cstamp
= jiffies
;
2512 ifp
->tokenized
= tokenized
;
2513 spin_unlock_bh(&ifp
->lock
);
2514 addrconf_dad_start(ifp
);
2522 /* update lifetime (RFC2462 5.5.3 e) */
2523 spin_lock_bh(&ifp
->lock
);
2525 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
2526 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
2529 if (!update_lft
&& !create
&& stored_lft
) {
2530 const u32 minimum_lft
= min_t(u32
,
2531 stored_lft
, MIN_VALID_LIFETIME
);
2532 valid_lft
= max(valid_lft
, minimum_lft
);
2534 /* RFC4862 Section 5.5.3e:
2535 * "Note that the preferred lifetime of the
2536 * corresponding address is always reset to
2537 * the Preferred Lifetime in the received
2538 * Prefix Information option, regardless of
2539 * whether the valid lifetime is also reset or
2542 * So we should always update prefered_lft here.
2548 ifp
->valid_lft
= valid_lft
;
2549 ifp
->prefered_lft
= prefered_lft
;
2552 ifp
->flags
&= ~IFA_F_DEPRECATED
;
2553 spin_unlock_bh(&ifp
->lock
);
2555 if (!(flags
&IFA_F_TENTATIVE
))
2556 ipv6_ifa_notify(0, ifp
);
2558 spin_unlock_bh(&ifp
->lock
);
2560 manage_tempaddrs(in6_dev
, ifp
, valid_lft
, prefered_lft
,
2569 EXPORT_SYMBOL_GPL(addrconf_prefix_rcv_add_addr
);
2571 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
, bool sllao
)
2573 struct prefix_info
*pinfo
;
2578 struct inet6_dev
*in6_dev
;
2579 struct net
*net
= dev_net(dev
);
2581 pinfo
= (struct prefix_info
*) opt
;
2583 if (len
< sizeof(struct prefix_info
)) {
2584 ADBG("addrconf: prefix option too short\n");
2589 * Validation checks ([ADDRCONF], page 19)
2592 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
2594 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
2597 valid_lft
= ntohl(pinfo
->valid
);
2598 prefered_lft
= ntohl(pinfo
->prefered
);
2600 if (prefered_lft
> valid_lft
) {
2601 net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n");
2605 in6_dev
= in6_dev_get(dev
);
2608 net_dbg_ratelimited("addrconf: device %s not configured\n",
2614 * Two things going on here:
2615 * 1) Add routes for on-link prefixes
2616 * 2) Configure prefixes with the auto flag set
2619 if (pinfo
->onlink
) {
2620 struct rt6_info
*rt
;
2621 unsigned long rt_expires
;
2623 /* Avoid arithmetic overflow. Really, we could
2624 * save rt_expires in seconds, likely valid_lft,
2625 * but it would require division in fib gc, that it
2629 rt_expires
= addrconf_timeout_fixup(valid_lft
, HZ
);
2631 rt_expires
= addrconf_timeout_fixup(valid_lft
, USER_HZ
);
2633 if (addrconf_finite_timeout(rt_expires
))
2636 rt
= addrconf_get_prefix_route(&pinfo
->prefix
,
2639 RTF_ADDRCONF
| RTF_PREFIX_RT
,
2640 RTF_GATEWAY
| RTF_DEFAULT
);
2643 /* Autoconf prefix route */
2644 if (valid_lft
== 0) {
2647 } else if (addrconf_finite_timeout(rt_expires
)) {
2649 rt6_set_expires(rt
, jiffies
+ rt_expires
);
2651 rt6_clean_expires(rt
);
2653 } else if (valid_lft
) {
2654 clock_t expires
= 0;
2655 int flags
= RTF_ADDRCONF
| RTF_PREFIX_RT
;
2656 if (addrconf_finite_timeout(rt_expires
)) {
2658 flags
|= RTF_EXPIRES
;
2659 expires
= jiffies_to_clock_t(rt_expires
);
2661 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
2662 dev
, expires
, flags
);
2667 /* Try to figure out our local address for this prefix */
2669 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
2670 struct in6_addr addr
;
2671 bool tokenized
= false, dev_addr_generated
= false;
2673 if (pinfo
->prefix_len
== 64) {
2674 memcpy(&addr
, &pinfo
->prefix
, 8);
2676 if (!ipv6_addr_any(&in6_dev
->token
)) {
2677 read_lock_bh(&in6_dev
->lock
);
2678 memcpy(addr
.s6_addr
+ 8,
2679 in6_dev
->token
.s6_addr
+ 8, 8);
2680 read_unlock_bh(&in6_dev
->lock
);
2682 } else if (is_addr_mode_generate_stable(in6_dev
) &&
2683 !ipv6_generate_stable_address(&addr
, 0,
2685 addr_flags
|= IFA_F_STABLE_PRIVACY
;
2687 } else if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
2688 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
2691 dev_addr_generated
= true;
2695 net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n",
2700 err
= addrconf_prefix_rcv_add_addr(net
, dev
, pinfo
, in6_dev
,
2703 tokenized
, valid_lft
,
2708 /* Ignore error case here because previous prefix add addr was
2709 * successful which will be notified.
2711 ndisc_ops_prefix_rcv_add_addr(net
, dev
, pinfo
, in6_dev
, &addr
,
2712 addr_type
, addr_flags
, sllao
,
2713 tokenized
, valid_lft
,
2715 dev_addr_generated
);
2717 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
2719 in6_dev_put(in6_dev
);
2723 * Set destination address.
2724 * Special case for SIT interfaces where we create a new "virtual"
2727 int addrconf_set_dstaddr(struct net
*net
, void __user
*arg
)
2729 struct in6_ifreq ireq
;
2730 struct net_device
*dev
;
2736 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2739 dev
= __dev_get_by_index(net
, ireq
.ifr6_ifindex
);
2745 #if IS_ENABLED(CONFIG_IPV6_SIT)
2746 if (dev
->type
== ARPHRD_SIT
) {
2747 const struct net_device_ops
*ops
= dev
->netdev_ops
;
2749 struct ip_tunnel_parm p
;
2751 err
= -EADDRNOTAVAIL
;
2752 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
2755 memset(&p
, 0, sizeof(p
));
2756 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
2760 p
.iph
.protocol
= IPPROTO_IPV6
;
2762 ifr
.ifr_ifru
.ifru_data
= (__force
void __user
*)&p
;
2764 if (ops
->ndo_do_ioctl
) {
2765 mm_segment_t oldfs
= get_fs();
2768 err
= ops
->ndo_do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
2775 dev
= __dev_get_by_name(net
, p
.name
);
2778 err
= dev_open(dev
);
2788 static int ipv6_mc_config(struct sock
*sk
, bool join
,
2789 const struct in6_addr
*addr
, int ifindex
)
2797 ret
= ipv6_sock_mc_join(sk
, ifindex
, addr
);
2799 ret
= ipv6_sock_mc_drop(sk
, ifindex
, addr
);
2806 * Manual configuration of address on an interface
2808 static int inet6_addr_add(struct net
*net
, int ifindex
,
2809 const struct in6_addr
*pfx
,
2810 const struct in6_addr
*peer_pfx
,
2811 unsigned int plen
, __u32 ifa_flags
,
2812 __u32 prefered_lft
, __u32 valid_lft
,
2813 struct netlink_ext_ack
*extack
)
2815 struct inet6_ifaddr
*ifp
;
2816 struct inet6_dev
*idev
;
2817 struct net_device
*dev
;
2818 unsigned long timeout
;
2828 /* check the lifetime */
2829 if (!valid_lft
|| prefered_lft
> valid_lft
)
2832 if (ifa_flags
& IFA_F_MANAGETEMPADDR
&& plen
!= 64)
2835 dev
= __dev_get_by_index(net
, ifindex
);
2839 idev
= addrconf_add_dev(dev
);
2841 return PTR_ERR(idev
);
2843 if (ifa_flags
& IFA_F_MCAUTOJOIN
) {
2844 int ret
= ipv6_mc_config(net
->ipv6
.mc_autojoin_sk
,
2845 true, pfx
, ifindex
);
2851 scope
= ipv6_addr_scope(pfx
);
2853 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
2854 if (addrconf_finite_timeout(timeout
)) {
2855 expires
= jiffies_to_clock_t(timeout
* HZ
);
2856 valid_lft
= timeout
;
2857 flags
= RTF_EXPIRES
;
2861 ifa_flags
|= IFA_F_PERMANENT
;
2864 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
2865 if (addrconf_finite_timeout(timeout
)) {
2867 ifa_flags
|= IFA_F_DEPRECATED
;
2868 prefered_lft
= timeout
;
2871 ifp
= ipv6_add_addr(idev
, pfx
, peer_pfx
, plen
, scope
, ifa_flags
,
2872 valid_lft
, prefered_lft
, true, extack
);
2875 if (!(ifa_flags
& IFA_F_NOPREFIXROUTE
)) {
2876 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
2881 * Note that section 3.1 of RFC 4429 indicates
2882 * that the Optimistic flag should not be set for
2883 * manually configured addresses
2885 addrconf_dad_start(ifp
);
2886 if (ifa_flags
& IFA_F_MANAGETEMPADDR
)
2887 manage_tempaddrs(idev
, ifp
, valid_lft
, prefered_lft
,
2890 addrconf_verify_rtnl();
2892 } else if (ifa_flags
& IFA_F_MCAUTOJOIN
) {
2893 ipv6_mc_config(net
->ipv6
.mc_autojoin_sk
,
2894 false, pfx
, ifindex
);
2897 return PTR_ERR(ifp
);
2900 static int inet6_addr_del(struct net
*net
, int ifindex
, u32 ifa_flags
,
2901 const struct in6_addr
*pfx
, unsigned int plen
)
2903 struct inet6_ifaddr
*ifp
;
2904 struct inet6_dev
*idev
;
2905 struct net_device
*dev
;
2910 dev
= __dev_get_by_index(net
, ifindex
);
2914 idev
= __in6_dev_get(dev
);
2918 read_lock_bh(&idev
->lock
);
2919 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
2920 if (ifp
->prefix_len
== plen
&&
2921 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
2923 read_unlock_bh(&idev
->lock
);
2925 if (!(ifp
->flags
& IFA_F_TEMPORARY
) &&
2926 (ifa_flags
& IFA_F_MANAGETEMPADDR
))
2927 manage_tempaddrs(idev
, ifp
, 0, 0, false,
2930 addrconf_verify_rtnl();
2931 if (ipv6_addr_is_multicast(pfx
)) {
2932 ipv6_mc_config(net
->ipv6
.mc_autojoin_sk
,
2933 false, pfx
, dev
->ifindex
);
2938 read_unlock_bh(&idev
->lock
);
2939 return -EADDRNOTAVAIL
;
2943 int addrconf_add_ifaddr(struct net
*net
, void __user
*arg
)
2945 struct in6_ifreq ireq
;
2948 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
2951 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2955 err
= inet6_addr_add(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, NULL
,
2956 ireq
.ifr6_prefixlen
, IFA_F_PERMANENT
,
2957 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
, NULL
);
2962 int addrconf_del_ifaddr(struct net
*net
, void __user
*arg
)
2964 struct in6_ifreq ireq
;
2967 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
2970 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2974 err
= inet6_addr_del(net
, ireq
.ifr6_ifindex
, 0, &ireq
.ifr6_addr
,
2975 ireq
.ifr6_prefixlen
);
2980 static void add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
2981 int plen
, int scope
)
2983 struct inet6_ifaddr
*ifp
;
2985 ifp
= ipv6_add_addr(idev
, addr
, NULL
, plen
,
2986 scope
, IFA_F_PERMANENT
,
2987 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
,
2990 spin_lock_bh(&ifp
->lock
);
2991 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2992 spin_unlock_bh(&ifp
->lock
);
2993 rt_genid_bump_ipv6(dev_net(idev
->dev
));
2994 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2999 #if IS_ENABLED(CONFIG_IPV6_SIT)
3000 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
3002 struct in6_addr addr
;
3003 struct net_device
*dev
;
3004 struct net
*net
= dev_net(idev
->dev
);
3010 memset(&addr
, 0, sizeof(struct in6_addr
));
3011 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
3013 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
3014 addr
.s6_addr32
[0] = htonl(0xfe800000);
3018 scope
= IPV6_ADDR_COMPATv4
;
3020 pflags
|= RTF_NONEXTHOP
;
3023 if (addr
.s6_addr32
[3]) {
3024 add_addr(idev
, &addr
, plen
, scope
);
3025 addrconf_prefix_route(&addr
, plen
, idev
->dev
, 0, pflags
);
3029 for_each_netdev(net
, dev
) {
3030 struct in_device
*in_dev
= __in_dev_get_rtnl(dev
);
3031 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
3032 struct in_ifaddr
*ifa
;
3036 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
3038 addr
.s6_addr32
[3] = ifa
->ifa_local
;
3040 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
3042 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
3043 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
3048 add_addr(idev
, &addr
, plen
, flag
);
3049 addrconf_prefix_route(&addr
, plen
, idev
->dev
, 0,
3057 static void init_loopback(struct net_device
*dev
)
3059 struct inet6_dev
*idev
;
3065 idev
= ipv6_find_idev(dev
);
3067 pr_debug("%s: add_dev failed\n", __func__
);
3071 add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
);
3074 void addrconf_add_linklocal(struct inet6_dev
*idev
,
3075 const struct in6_addr
*addr
, u32 flags
)
3077 struct inet6_ifaddr
*ifp
;
3078 u32 addr_flags
= flags
| IFA_F_PERMANENT
;
3080 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3081 if ((dev_net(idev
->dev
)->ipv6
.devconf_all
->optimistic_dad
||
3082 idev
->cnf
.optimistic_dad
) &&
3083 !dev_net(idev
->dev
)->ipv6
.devconf_all
->forwarding
)
3084 addr_flags
|= IFA_F_OPTIMISTIC
;
3087 ifp
= ipv6_add_addr(idev
, addr
, NULL
, 64, IFA_LINK
, addr_flags
,
3088 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
, true, NULL
);
3090 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
3091 addrconf_dad_start(ifp
);
3095 EXPORT_SYMBOL_GPL(addrconf_add_linklocal
);
3097 static bool ipv6_reserved_interfaceid(struct in6_addr address
)
3099 if ((address
.s6_addr32
[2] | address
.s6_addr32
[3]) == 0)
3102 if (address
.s6_addr32
[2] == htonl(0x02005eff) &&
3103 ((address
.s6_addr32
[3] & htonl(0xfe000000)) == htonl(0xfe000000)))
3106 if (address
.s6_addr32
[2] == htonl(0xfdffffff) &&
3107 ((address
.s6_addr32
[3] & htonl(0xffffff80)) == htonl(0xffffff80)))
3113 static int ipv6_generate_stable_address(struct in6_addr
*address
,
3115 const struct inet6_dev
*idev
)
3117 static DEFINE_SPINLOCK(lock
);
3118 static __u32 digest
[SHA_DIGEST_WORDS
];
3119 static __u32 workspace
[SHA_WORKSPACE_WORDS
];
3122 char __data
[SHA_MESSAGE_BYTES
];
3124 struct in6_addr secret
;
3126 unsigned char hwaddr
[MAX_ADDR_LEN
];
3131 struct in6_addr secret
;
3132 struct in6_addr temp
;
3133 struct net
*net
= dev_net(idev
->dev
);
3135 BUILD_BUG_ON(sizeof(data
.__data
) != sizeof(data
));
3137 if (idev
->cnf
.stable_secret
.initialized
)
3138 secret
= idev
->cnf
.stable_secret
.secret
;
3139 else if (net
->ipv6
.devconf_dflt
->stable_secret
.initialized
)
3140 secret
= net
->ipv6
.devconf_dflt
->stable_secret
.secret
;
3145 spin_lock_bh(&lock
);
3148 memset(&data
, 0, sizeof(data
));
3149 memset(workspace
, 0, sizeof(workspace
));
3150 memcpy(data
.hwaddr
, idev
->dev
->perm_addr
, idev
->dev
->addr_len
);
3151 data
.prefix
[0] = address
->s6_addr32
[0];
3152 data
.prefix
[1] = address
->s6_addr32
[1];
3153 data
.secret
= secret
;
3154 data
.dad_count
= dad_count
;
3156 sha_transform(digest
, data
.__data
, workspace
);
3159 temp
.s6_addr32
[2] = (__force __be32
)digest
[0];
3160 temp
.s6_addr32
[3] = (__force __be32
)digest
[1];
3162 spin_unlock_bh(&lock
);
3164 if (ipv6_reserved_interfaceid(temp
)) {
3166 if (dad_count
> dev_net(idev
->dev
)->ipv6
.sysctl
.idgen_retries
)
3175 static void ipv6_gen_mode_random_init(struct inet6_dev
*idev
)
3177 struct ipv6_stable_secret
*s
= &idev
->cnf
.stable_secret
;
3181 s
= &idev
->cnf
.stable_secret
;
3182 get_random_bytes(&s
->secret
, sizeof(s
->secret
));
3183 s
->initialized
= true;
3186 static void addrconf_addr_gen(struct inet6_dev
*idev
, bool prefix_route
)
3188 struct in6_addr addr
;
3190 /* no link local addresses on L3 master devices */
3191 if (netif_is_l3_master(idev
->dev
))
3194 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
3196 switch (idev
->cnf
.addr_gen_mode
) {
3197 case IN6_ADDR_GEN_MODE_RANDOM
:
3198 ipv6_gen_mode_random_init(idev
);
3200 case IN6_ADDR_GEN_MODE_STABLE_PRIVACY
:
3201 if (!ipv6_generate_stable_address(&addr
, 0, idev
))
3202 addrconf_add_linklocal(idev
, &addr
,
3203 IFA_F_STABLE_PRIVACY
);
3204 else if (prefix_route
)
3205 addrconf_prefix_route(&addr
, 64, idev
->dev
, 0, 0);
3207 case IN6_ADDR_GEN_MODE_EUI64
:
3208 /* addrconf_add_linklocal also adds a prefix_route and we
3209 * only need to care about prefix routes if ipv6_generate_eui64
3210 * couldn't generate one.
3212 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) == 0)
3213 addrconf_add_linklocal(idev
, &addr
, 0);
3214 else if (prefix_route
)
3215 addrconf_prefix_route(&addr
, 64, idev
->dev
, 0, 0);
3217 case IN6_ADDR_GEN_MODE_NONE
:
3219 /* will not add any link local address */
3224 static void addrconf_dev_config(struct net_device
*dev
)
3226 struct inet6_dev
*idev
;
3230 if ((dev
->type
!= ARPHRD_ETHER
) &&
3231 (dev
->type
!= ARPHRD_FDDI
) &&
3232 (dev
->type
!= ARPHRD_ARCNET
) &&
3233 (dev
->type
!= ARPHRD_INFINIBAND
) &&
3234 (dev
->type
!= ARPHRD_IEEE1394
) &&
3235 (dev
->type
!= ARPHRD_TUNNEL6
) &&
3236 (dev
->type
!= ARPHRD_6LOWPAN
) &&
3237 (dev
->type
!= ARPHRD_IP6GRE
) &&
3238 (dev
->type
!= ARPHRD_IPGRE
) &&
3239 (dev
->type
!= ARPHRD_TUNNEL
) &&
3240 (dev
->type
!= ARPHRD_NONE
)) {
3241 /* Alas, we support only Ethernet autoconfiguration. */
3245 idev
= addrconf_add_dev(dev
);
3249 /* this device type has no EUI support */
3250 if (dev
->type
== ARPHRD_NONE
&&
3251 idev
->cnf
.addr_gen_mode
== IN6_ADDR_GEN_MODE_EUI64
)
3252 idev
->cnf
.addr_gen_mode
= IN6_ADDR_GEN_MODE_RANDOM
;
3254 addrconf_addr_gen(idev
, false);
3257 #if IS_ENABLED(CONFIG_IPV6_SIT)
3258 static void addrconf_sit_config(struct net_device
*dev
)
3260 struct inet6_dev
*idev
;
3265 * Configure the tunnel with one of our IPv4
3266 * addresses... we should configure all of
3267 * our v4 addrs in the tunnel
3270 idev
= ipv6_find_idev(dev
);
3272 pr_debug("%s: add_dev failed\n", __func__
);
3276 if (dev
->priv_flags
& IFF_ISATAP
) {
3277 addrconf_addr_gen(idev
, false);
3281 sit_add_v4_addrs(idev
);
3283 if (dev
->flags
&IFF_POINTOPOINT
)
3284 addrconf_add_mroute(dev
);
3288 #if IS_ENABLED(CONFIG_NET_IPGRE)
3289 static void addrconf_gre_config(struct net_device
*dev
)
3291 struct inet6_dev
*idev
;
3295 idev
= ipv6_find_idev(dev
);
3297 pr_debug("%s: add_dev failed\n", __func__
);
3301 addrconf_addr_gen(idev
, true);
3302 if (dev
->flags
& IFF_POINTOPOINT
)
3303 addrconf_add_mroute(dev
);
3307 static int fixup_permanent_addr(struct inet6_dev
*idev
,
3308 struct inet6_ifaddr
*ifp
)
3310 /* !rt6i_node means the host route was removed from the
3311 * FIB, for example, if 'lo' device is taken down. In that
3312 * case regenerate the host route.
3314 if (!ifp
->rt
|| !ifp
->rt
->rt6i_node
) {
3315 struct rt6_info
*rt
, *prev
;
3317 rt
= addrconf_dst_alloc(idev
, &ifp
->addr
, false);
3321 /* ifp->rt can be accessed outside of rtnl */
3322 spin_lock(&ifp
->lock
);
3325 spin_unlock(&ifp
->lock
);
3330 if (!(ifp
->flags
& IFA_F_NOPREFIXROUTE
)) {
3331 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
,
3335 if (ifp
->state
== INET6_IFADDR_STATE_PREDAD
)
3336 addrconf_dad_start(ifp
);
3341 static void addrconf_permanent_addr(struct net_device
*dev
)
3343 struct inet6_ifaddr
*ifp
, *tmp
;
3344 struct inet6_dev
*idev
;
3346 idev
= __in6_dev_get(dev
);
3350 write_lock_bh(&idev
->lock
);
3352 list_for_each_entry_safe(ifp
, tmp
, &idev
->addr_list
, if_list
) {
3353 if ((ifp
->flags
& IFA_F_PERMANENT
) &&
3354 fixup_permanent_addr(idev
, ifp
) < 0) {
3355 write_unlock_bh(&idev
->lock
);
3358 write_lock_bh(&idev
->lock
);
3360 net_info_ratelimited("%s: Failed to add prefix route for address %pI6c; dropping\n",
3361 idev
->dev
->name
, &ifp
->addr
);
3365 write_unlock_bh(&idev
->lock
);
3368 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
3371 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
3372 struct netdev_notifier_changeupper_info
*info
;
3373 struct inet6_dev
*idev
= __in6_dev_get(dev
);
3374 struct net
*net
= dev_net(dev
);
3375 int run_pending
= 0;
3379 case NETDEV_REGISTER
:
3380 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
3381 idev
= ipv6_add_dev(dev
);
3383 return notifier_from_errno(PTR_ERR(idev
));
3387 case NETDEV_CHANGEMTU
:
3388 /* if MTU under IPV6_MIN_MTU stop IPv6 on this interface. */
3389 if (dev
->mtu
< IPV6_MIN_MTU
) {
3390 addrconf_ifdown(dev
, dev
!= net
->loopback_dev
);
3395 rt6_mtu_change(dev
, dev
->mtu
);
3396 idev
->cnf
.mtu6
= dev
->mtu
;
3400 /* allocate new idev */
3401 idev
= ipv6_add_dev(dev
);
3405 /* device is still not ready */
3406 if (!(idev
->if_flags
& IF_READY
))
3415 if (dev
->flags
& IFF_SLAVE
)
3418 if (idev
&& idev
->cnf
.disable_ipv6
)
3421 if (event
== NETDEV_UP
) {
3422 /* restore routes for permanent addresses */
3423 addrconf_permanent_addr(dev
);
3425 if (!addrconf_link_ready(dev
)) {
3426 /* device is not ready yet. */
3427 pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n",
3432 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
3433 idev
= ipv6_add_dev(dev
);
3435 if (!IS_ERR_OR_NULL(idev
)) {
3436 idev
->if_flags
|= IF_READY
;
3439 } else if (event
== NETDEV_CHANGE
) {
3440 if (!addrconf_link_ready(dev
)) {
3441 /* device is still not ready. */
3446 if (idev
->if_flags
& IF_READY
) {
3447 /* device is already configured -
3448 * but resend MLD reports, we might
3449 * have roamed and need to update
3450 * multicast snooping switches
3455 idev
->if_flags
|= IF_READY
;
3458 pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n",
3464 switch (dev
->type
) {
3465 #if IS_ENABLED(CONFIG_IPV6_SIT)
3467 addrconf_sit_config(dev
);
3470 #if IS_ENABLED(CONFIG_NET_IPGRE)
3472 addrconf_gre_config(dev
);
3475 case ARPHRD_LOOPBACK
:
3480 addrconf_dev_config(dev
);
3484 if (!IS_ERR_OR_NULL(idev
)) {
3486 addrconf_dad_run(idev
);
3489 * If the MTU changed during the interface down,
3490 * when the interface up, the changed MTU must be
3491 * reflected in the idev as well as routers.
3493 if (idev
->cnf
.mtu6
!= dev
->mtu
&&
3494 dev
->mtu
>= IPV6_MIN_MTU
) {
3495 rt6_mtu_change(dev
, dev
->mtu
);
3496 idev
->cnf
.mtu6
= dev
->mtu
;
3498 idev
->tstamp
= jiffies
;
3499 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
3502 * If the changed mtu during down is lower than
3503 * IPV6_MIN_MTU stop IPv6 on this interface.
3505 if (dev
->mtu
< IPV6_MIN_MTU
)
3506 addrconf_ifdown(dev
, dev
!= net
->loopback_dev
);
3511 case NETDEV_UNREGISTER
:
3513 * Remove all addresses from this interface.
3515 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
3518 case NETDEV_CHANGENAME
:
3520 snmp6_unregister_dev(idev
);
3521 addrconf_sysctl_unregister(idev
);
3522 err
= addrconf_sysctl_register(idev
);
3524 return notifier_from_errno(err
);
3525 err
= snmp6_register_dev(idev
);
3527 addrconf_sysctl_unregister(idev
);
3528 return notifier_from_errno(err
);
3533 case NETDEV_PRE_TYPE_CHANGE
:
3534 case NETDEV_POST_TYPE_CHANGE
:
3536 addrconf_type_change(dev
, event
);
3539 case NETDEV_CHANGEUPPER
:
3542 /* flush all routes if dev is linked to or unlinked from
3543 * an L3 master device (e.g., VRF)
3545 if (info
->upper_dev
&& netif_is_l3_master(info
->upper_dev
))
3546 addrconf_ifdown(dev
, 0);
3553 * addrconf module should be notified of a device going up
3555 static struct notifier_block ipv6_dev_notf
= {
3556 .notifier_call
= addrconf_notify
,
3557 .priority
= ADDRCONF_NOTIFY_PRIORITY
,
3560 static void addrconf_type_change(struct net_device
*dev
, unsigned long event
)
3562 struct inet6_dev
*idev
;
3565 idev
= __in6_dev_get(dev
);
3567 if (event
== NETDEV_POST_TYPE_CHANGE
)
3568 ipv6_mc_remap(idev
);
3569 else if (event
== NETDEV_PRE_TYPE_CHANGE
)
3570 ipv6_mc_unmap(idev
);
3573 static bool addr_is_local(const struct in6_addr
*addr
)
3575 return ipv6_addr_type(addr
) &
3576 (IPV6_ADDR_LINKLOCAL
| IPV6_ADDR_LOOPBACK
);
3579 static int addrconf_ifdown(struct net_device
*dev
, int how
)
3581 struct net
*net
= dev_net(dev
);
3582 struct inet6_dev
*idev
;
3583 struct inet6_ifaddr
*ifa
, *tmp
;
3590 rt6_ifdown(net
, dev
);
3591 neigh_ifdown(&nd_tbl
, dev
);
3593 idev
= __in6_dev_get(dev
);
3598 * Step 1: remove reference to ipv6 device from parent device.
3604 /* protected by rtnl_lock */
3605 RCU_INIT_POINTER(dev
->ip6_ptr
, NULL
);
3607 /* Step 1.5: remove snmp6 entry */
3608 snmp6_unregister_dev(idev
);
3612 /* aggregate the system setting and interface setting */
3613 _keep_addr
= net
->ipv6
.devconf_all
->keep_addr_on_down
;
3615 _keep_addr
= idev
->cnf
.keep_addr_on_down
;
3617 /* combine the user config with event to determine if permanent
3618 * addresses are to be removed from address hash table
3620 keep_addr
= !(how
|| _keep_addr
<= 0 || idev
->cnf
.disable_ipv6
);
3622 /* Step 2: clear hash table */
3623 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
3624 struct hlist_head
*h
= &inet6_addr_lst
[i
];
3626 spin_lock_bh(&addrconf_hash_lock
);
3628 hlist_for_each_entry_rcu(ifa
, h
, addr_lst
) {
3629 if (ifa
->idev
== idev
) {
3630 addrconf_del_dad_work(ifa
);
3631 /* combined flag + permanent flag decide if
3632 * address is retained on a down event
3635 !(ifa
->flags
& IFA_F_PERMANENT
) ||
3636 addr_is_local(&ifa
->addr
)) {
3637 hlist_del_init_rcu(&ifa
->addr_lst
);
3642 spin_unlock_bh(&addrconf_hash_lock
);
3645 write_lock_bh(&idev
->lock
);
3647 addrconf_del_rs_timer(idev
);
3649 /* Step 2: clear flags for stateless addrconf */
3651 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
3653 /* Step 3: clear tempaddr list */
3654 while (!list_empty(&idev
->tempaddr_list
)) {
3655 ifa
= list_first_entry(&idev
->tempaddr_list
,
3656 struct inet6_ifaddr
, tmp_list
);
3657 list_del(&ifa
->tmp_list
);
3658 write_unlock_bh(&idev
->lock
);
3659 spin_lock_bh(&ifa
->lock
);
3662 in6_ifa_put(ifa
->ifpub
);
3665 spin_unlock_bh(&ifa
->lock
);
3667 write_lock_bh(&idev
->lock
);
3670 /* re-combine the user config with event to determine if permanent
3671 * addresses are to be removed from the interface list
3673 keep_addr
= (!how
&& _keep_addr
> 0 && !idev
->cnf
.disable_ipv6
);
3675 list_for_each_entry_safe(ifa
, tmp
, &idev
->addr_list
, if_list
) {
3676 struct rt6_info
*rt
= NULL
;
3679 addrconf_del_dad_work(ifa
);
3681 keep
= keep_addr
&& (ifa
->flags
& IFA_F_PERMANENT
) &&
3682 !addr_is_local(&ifa
->addr
);
3684 write_unlock_bh(&idev
->lock
);
3685 spin_lock_bh(&ifa
->lock
);
3688 /* set state to skip the notifier below */
3689 state
= INET6_IFADDR_STATE_DEAD
;
3690 ifa
->state
= INET6_IFADDR_STATE_PREDAD
;
3691 if (!(ifa
->flags
& IFA_F_NODAD
))
3692 ifa
->flags
|= IFA_F_TENTATIVE
;
3698 ifa
->state
= INET6_IFADDR_STATE_DEAD
;
3701 spin_unlock_bh(&ifa
->lock
);
3706 if (state
!= INET6_IFADDR_STATE_DEAD
) {
3707 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
3708 inet6addr_notifier_call_chain(NETDEV_DOWN
, ifa
);
3710 if (idev
->cnf
.forwarding
)
3711 addrconf_leave_anycast(ifa
);
3712 addrconf_leave_solict(ifa
->idev
, &ifa
->addr
);
3715 write_lock_bh(&idev
->lock
);
3717 list_del_rcu(&ifa
->if_list
);
3722 write_unlock_bh(&idev
->lock
);
3724 /* Step 5: Discard anycast and multicast list */
3726 ipv6_ac_destroy_dev(idev
);
3727 ipv6_mc_destroy_dev(idev
);
3732 idev
->tstamp
= jiffies
;
3734 /* Last: Shot the device (if unregistered) */
3736 addrconf_sysctl_unregister(idev
);
3737 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
3738 neigh_ifdown(&nd_tbl
, dev
);
3744 static void addrconf_rs_timer(unsigned long data
)
3746 struct inet6_dev
*idev
= (struct inet6_dev
*)data
;
3747 struct net_device
*dev
= idev
->dev
;
3748 struct in6_addr lladdr
;
3750 write_lock(&idev
->lock
);
3751 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
))
3754 if (!ipv6_accept_ra(idev
))
3757 /* Announcement received after solicitation was sent */
3758 if (idev
->if_flags
& IF_RA_RCVD
)
3761 if (idev
->rs_probes
++ < idev
->cnf
.rtr_solicits
|| idev
->cnf
.rtr_solicits
< 0) {
3762 write_unlock(&idev
->lock
);
3763 if (!ipv6_get_lladdr(dev
, &lladdr
, IFA_F_TENTATIVE
))
3764 ndisc_send_rs(dev
, &lladdr
,
3765 &in6addr_linklocal_allrouters
);
3769 write_lock(&idev
->lock
);
3770 idev
->rs_interval
= rfc3315_s14_backoff_update(
3771 idev
->rs_interval
, idev
->cnf
.rtr_solicit_max_interval
);
3772 /* The wait after the last probe can be shorter */
3773 addrconf_mod_rs_timer(idev
, (idev
->rs_probes
==
3774 idev
->cnf
.rtr_solicits
) ?
3775 idev
->cnf
.rtr_solicit_delay
:
3779 * Note: we do not support deprecated "all on-link"
3780 * assumption any longer.
3782 pr_debug("%s: no IPv6 routers present\n", idev
->dev
->name
);
3786 write_unlock(&idev
->lock
);
3792 * Duplicate Address Detection
3794 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
3796 unsigned long rand_num
;
3797 struct inet6_dev
*idev
= ifp
->idev
;
3800 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
3803 rand_num
= prandom_u32() % (idev
->cnf
.rtr_solicit_delay
? : 1);
3806 if (idev
->cnf
.enhanced_dad
||
3807 dev_net(idev
->dev
)->ipv6
.devconf_all
->enhanced_dad
) {
3809 get_random_bytes(&nonce
, 6);
3812 ifp
->dad_nonce
= nonce
;
3813 ifp
->dad_probes
= idev
->cnf
.dad_transmits
;
3814 addrconf_mod_dad_work(ifp
, rand_num
);
3817 static void addrconf_dad_begin(struct inet6_ifaddr
*ifp
)
3819 struct inet6_dev
*idev
= ifp
->idev
;
3820 struct net_device
*dev
= idev
->dev
;
3821 bool bump_id
, notify
= false;
3823 addrconf_join_solict(dev
, &ifp
->addr
);
3825 prandom_seed((__force u32
) ifp
->addr
.s6_addr32
[3]);
3827 read_lock_bh(&idev
->lock
);
3828 spin_lock(&ifp
->lock
);
3829 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
)
3832 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
3833 (dev_net(dev
)->ipv6
.devconf_all
->accept_dad
< 1 &&
3834 idev
->cnf
.accept_dad
< 1) ||
3835 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
3836 ifp
->flags
& IFA_F_NODAD
) {
3837 bump_id
= ifp
->flags
& IFA_F_TENTATIVE
;
3838 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3839 spin_unlock(&ifp
->lock
);
3840 read_unlock_bh(&idev
->lock
);
3842 addrconf_dad_completed(ifp
, bump_id
);
3846 if (!(idev
->if_flags
& IF_READY
)) {
3847 spin_unlock(&ifp
->lock
);
3848 read_unlock_bh(&idev
->lock
);
3850 * If the device is not ready:
3851 * - keep it tentative if it is a permanent address.
3852 * - otherwise, kill it.
3855 addrconf_dad_stop(ifp
, 0);
3860 * Optimistic nodes can start receiving
3863 if (ifp
->flags
& IFA_F_OPTIMISTIC
) {
3864 ip6_ins_rt(ifp
->rt
);
3865 if (ipv6_use_optimistic_addr(dev_net(dev
), idev
)) {
3866 /* Because optimistic nodes can use this address,
3867 * notify listeners. If DAD fails, RTM_DELADDR is sent.
3873 addrconf_dad_kick(ifp
);
3875 spin_unlock(&ifp
->lock
);
3876 read_unlock_bh(&idev
->lock
);
3878 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
3881 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
)
3883 bool begin_dad
= false;
3885 spin_lock_bh(&ifp
->lock
);
3886 if (ifp
->state
!= INET6_IFADDR_STATE_DEAD
) {
3887 ifp
->state
= INET6_IFADDR_STATE_PREDAD
;
3890 spin_unlock_bh(&ifp
->lock
);
3893 addrconf_mod_dad_work(ifp
, 0);
3896 static void addrconf_dad_work(struct work_struct
*w
)
3898 struct inet6_ifaddr
*ifp
= container_of(to_delayed_work(w
),
3899 struct inet6_ifaddr
,
3901 struct inet6_dev
*idev
= ifp
->idev
;
3902 bool bump_id
, disable_ipv6
= false;
3903 struct in6_addr mcaddr
;
3909 } action
= DAD_PROCESS
;
3913 spin_lock_bh(&ifp
->lock
);
3914 if (ifp
->state
== INET6_IFADDR_STATE_PREDAD
) {
3916 ifp
->state
= INET6_IFADDR_STATE_DAD
;
3917 } else if (ifp
->state
== INET6_IFADDR_STATE_ERRDAD
) {
3919 ifp
->state
= INET6_IFADDR_STATE_POSTDAD
;
3921 if ((dev_net(idev
->dev
)->ipv6
.devconf_all
->accept_dad
> 1 ||
3922 idev
->cnf
.accept_dad
> 1) &&
3923 !idev
->cnf
.disable_ipv6
&&
3924 !(ifp
->flags
& IFA_F_STABLE_PRIVACY
)) {
3925 struct in6_addr addr
;
3927 addr
.s6_addr32
[0] = htonl(0xfe800000);
3928 addr
.s6_addr32
[1] = 0;
3930 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) &&
3931 ipv6_addr_equal(&ifp
->addr
, &addr
)) {
3932 /* DAD failed for link-local based on MAC */
3933 idev
->cnf
.disable_ipv6
= 1;
3935 pr_info("%s: IPv6 being disabled!\n",
3936 ifp
->idev
->dev
->name
);
3937 disable_ipv6
= true;
3941 spin_unlock_bh(&ifp
->lock
);
3943 if (action
== DAD_BEGIN
) {
3944 addrconf_dad_begin(ifp
);
3946 } else if (action
== DAD_ABORT
) {
3948 addrconf_dad_stop(ifp
, 1);
3950 addrconf_ifdown(idev
->dev
, 0);
3954 if (!ifp
->dad_probes
&& addrconf_dad_end(ifp
))
3957 write_lock_bh(&idev
->lock
);
3958 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
)) {
3959 write_unlock_bh(&idev
->lock
);
3963 spin_lock(&ifp
->lock
);
3964 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
) {
3965 spin_unlock(&ifp
->lock
);
3966 write_unlock_bh(&idev
->lock
);
3970 if (ifp
->dad_probes
== 0) {
3972 * DAD was successful
3975 bump_id
= ifp
->flags
& IFA_F_TENTATIVE
;
3976 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3977 spin_unlock(&ifp
->lock
);
3978 write_unlock_bh(&idev
->lock
);
3980 addrconf_dad_completed(ifp
, bump_id
);
3986 addrconf_mod_dad_work(ifp
,
3987 NEIGH_VAR(ifp
->idev
->nd_parms
, RETRANS_TIME
));
3988 spin_unlock(&ifp
->lock
);
3989 write_unlock_bh(&idev
->lock
);
3991 /* send a neighbour solicitation for our addr */
3992 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
3993 ndisc_send_ns(ifp
->idev
->dev
, &ifp
->addr
, &mcaddr
, &in6addr_any
,
4000 /* ifp->idev must be at least read locked */
4001 static bool ipv6_lonely_lladdr(struct inet6_ifaddr
*ifp
)
4003 struct inet6_ifaddr
*ifpiter
;
4004 struct inet6_dev
*idev
= ifp
->idev
;
4006 list_for_each_entry_reverse(ifpiter
, &idev
->addr_list
, if_list
) {
4007 if (ifpiter
->scope
> IFA_LINK
)
4009 if (ifp
!= ifpiter
&& ifpiter
->scope
== IFA_LINK
&&
4010 (ifpiter
->flags
& (IFA_F_PERMANENT
|IFA_F_TENTATIVE
|
4011 IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
)) ==
4018 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
, bool bump_id
)
4020 struct net_device
*dev
= ifp
->idev
->dev
;
4021 struct in6_addr lladdr
;
4022 bool send_rs
, send_mld
;
4024 addrconf_del_dad_work(ifp
);
4027 * Configure the address for reception. Now it is valid.
4030 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
4032 /* If added prefix is link local and we are prepared to process
4033 router advertisements, start sending router solicitations.
4036 read_lock_bh(&ifp
->idev
->lock
);
4037 send_mld
= ifp
->scope
== IFA_LINK
&& ipv6_lonely_lladdr(ifp
);
4038 send_rs
= send_mld
&&
4039 ipv6_accept_ra(ifp
->idev
) &&
4040 ifp
->idev
->cnf
.rtr_solicits
!= 0 &&
4041 (dev
->flags
&IFF_LOOPBACK
) == 0;
4042 read_unlock_bh(&ifp
->idev
->lock
);
4044 /* While dad is in progress mld report's source address is in6_addrany.
4045 * Resend with proper ll now.
4048 ipv6_mc_dad_complete(ifp
->idev
);
4052 * If a host as already performed a random delay
4053 * [...] as part of DAD [...] there is no need
4054 * to delay again before sending the first RS
4056 if (ipv6_get_lladdr(dev
, &lladdr
, IFA_F_TENTATIVE
))
4058 ndisc_send_rs(dev
, &lladdr
, &in6addr_linklocal_allrouters
);
4060 write_lock_bh(&ifp
->idev
->lock
);
4061 spin_lock(&ifp
->lock
);
4062 ifp
->idev
->rs_interval
= rfc3315_s14_backoff_init(
4063 ifp
->idev
->cnf
.rtr_solicit_interval
);
4064 ifp
->idev
->rs_probes
= 1;
4065 ifp
->idev
->if_flags
|= IF_RS_SENT
;
4066 addrconf_mod_rs_timer(ifp
->idev
, ifp
->idev
->rs_interval
);
4067 spin_unlock(&ifp
->lock
);
4068 write_unlock_bh(&ifp
->idev
->lock
);
4072 rt_genid_bump_ipv6(dev_net(dev
));
4074 /* Make sure that a new temporary address will be created
4075 * before this temporary address becomes deprecated.
4077 if (ifp
->flags
& IFA_F_TEMPORARY
)
4078 addrconf_verify_rtnl();
4081 static void addrconf_dad_run(struct inet6_dev
*idev
)
4083 struct inet6_ifaddr
*ifp
;
4085 read_lock_bh(&idev
->lock
);
4086 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
4087 spin_lock(&ifp
->lock
);
4088 if (ifp
->flags
& IFA_F_TENTATIVE
&&
4089 ifp
->state
== INET6_IFADDR_STATE_DAD
)
4090 addrconf_dad_kick(ifp
);
4091 spin_unlock(&ifp
->lock
);
4093 read_unlock_bh(&idev
->lock
);
4096 #ifdef CONFIG_PROC_FS
4097 struct if6_iter_state
{
4098 struct seq_net_private p
;
4103 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
, loff_t pos
)
4105 struct if6_iter_state
*state
= seq
->private;
4106 struct net
*net
= seq_file_net(seq
);
4107 struct inet6_ifaddr
*ifa
= NULL
;
4110 /* initial bucket if pos is 0 */
4116 for (; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
4117 hlist_for_each_entry_rcu(ifa
, &inet6_addr_lst
[state
->bucket
],
4119 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
4121 /* sync with offset */
4122 if (p
< state
->offset
) {
4130 /* prepare for next bucket */
4137 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
,
4138 struct inet6_ifaddr
*ifa
)
4140 struct if6_iter_state
*state
= seq
->private;
4141 struct net
*net
= seq_file_net(seq
);
4143 hlist_for_each_entry_continue_rcu(ifa
, addr_lst
) {
4144 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
4150 while (++state
->bucket
< IN6_ADDR_HSIZE
) {
4152 hlist_for_each_entry_rcu(ifa
,
4153 &inet6_addr_lst
[state
->bucket
], addr_lst
) {
4154 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
4164 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
4168 return if6_get_first(seq
, *pos
);
4171 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
4173 struct inet6_ifaddr
*ifa
;
4175 ifa
= if6_get_next(seq
, v
);
4180 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
4186 static int if6_seq_show(struct seq_file
*seq
, void *v
)
4188 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
4189 seq_printf(seq
, "%pi6 %02x %02x %02x %02x %8s\n",
4191 ifp
->idev
->dev
->ifindex
,
4195 ifp
->idev
->dev
->name
);
4199 static const struct seq_operations if6_seq_ops
= {
4200 .start
= if6_seq_start
,
4201 .next
= if6_seq_next
,
4202 .show
= if6_seq_show
,
4203 .stop
= if6_seq_stop
,
4206 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
4208 return seq_open_net(inode
, file
, &if6_seq_ops
,
4209 sizeof(struct if6_iter_state
));
4212 static const struct file_operations if6_fops
= {
4213 .owner
= THIS_MODULE
,
4214 .open
= if6_seq_open
,
4216 .llseek
= seq_lseek
,
4217 .release
= seq_release_net
,
4220 static int __net_init
if6_proc_net_init(struct net
*net
)
4222 if (!proc_create("if_inet6", S_IRUGO
, net
->proc_net
, &if6_fops
))
4227 static void __net_exit
if6_proc_net_exit(struct net
*net
)
4229 remove_proc_entry("if_inet6", net
->proc_net
);
4232 static struct pernet_operations if6_proc_net_ops
= {
4233 .init
= if6_proc_net_init
,
4234 .exit
= if6_proc_net_exit
,
4237 int __init
if6_proc_init(void)
4239 return register_pernet_subsys(&if6_proc_net_ops
);
4242 void if6_proc_exit(void)
4244 unregister_pernet_subsys(&if6_proc_net_ops
);
4246 #endif /* CONFIG_PROC_FS */
4248 #if IS_ENABLED(CONFIG_IPV6_MIP6)
4249 /* Check if address is a home address configured on any interface. */
4250 int ipv6_chk_home_addr(struct net
*net
, const struct in6_addr
*addr
)
4252 unsigned int hash
= inet6_addr_hash(net
, addr
);
4253 struct inet6_ifaddr
*ifp
= NULL
;
4257 hlist_for_each_entry_rcu(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
4258 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
4260 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
4261 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
4272 * Periodic address status verification
4275 static void addrconf_verify_rtnl(void)
4277 unsigned long now
, next
, next_sec
, next_sched
;
4278 struct inet6_ifaddr
*ifp
;
4285 next
= round_jiffies_up(now
+ ADDR_CHECK_FREQUENCY
);
4287 cancel_delayed_work(&addr_chk_work
);
4289 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
4291 hlist_for_each_entry_rcu_bh(ifp
, &inet6_addr_lst
[i
], addr_lst
) {
4294 /* When setting preferred_lft to a value not zero or
4295 * infinity, while valid_lft is infinity
4296 * IFA_F_PERMANENT has a non-infinity life time.
4298 if ((ifp
->flags
& IFA_F_PERMANENT
) &&
4299 (ifp
->prefered_lft
== INFINITY_LIFE_TIME
))
4302 spin_lock(&ifp
->lock
);
4303 /* We try to batch several events at once. */
4304 age
= (now
- ifp
->tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
4306 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
4307 age
>= ifp
->valid_lft
) {
4308 spin_unlock(&ifp
->lock
);
4312 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
4313 spin_unlock(&ifp
->lock
);
4315 } else if (age
>= ifp
->prefered_lft
) {
4316 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
4319 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
4321 ifp
->flags
|= IFA_F_DEPRECATED
;
4324 if ((ifp
->valid_lft
!= INFINITY_LIFE_TIME
) &&
4325 (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
)))
4326 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
4328 spin_unlock(&ifp
->lock
);
4333 ipv6_ifa_notify(0, ifp
);
4337 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
4338 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
4339 unsigned long regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
4340 ifp
->idev
->cnf
.dad_transmits
*
4341 NEIGH_VAR(ifp
->idev
->nd_parms
, RETRANS_TIME
) / HZ
;
4343 if (age
>= ifp
->prefered_lft
- regen_advance
) {
4344 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
4345 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
4346 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
4347 if (!ifp
->regen_count
&& ifpub
) {
4350 in6_ifa_hold(ifpub
);
4351 spin_unlock(&ifp
->lock
);
4353 spin_lock(&ifpub
->lock
);
4354 ifpub
->regen_count
= 0;
4355 spin_unlock(&ifpub
->lock
);
4356 ipv6_create_tempaddr(ifpub
, ifp
, true);
4361 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
4362 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
4363 spin_unlock(&ifp
->lock
);
4365 /* ifp->prefered_lft <= ifp->valid_lft */
4366 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
4367 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
4368 spin_unlock(&ifp
->lock
);
4373 next_sec
= round_jiffies_up(next
);
4376 /* If rounded timeout is accurate enough, accept it. */
4377 if (time_before(next_sec
, next
+ ADDRCONF_TIMER_FUZZ
))
4378 next_sched
= next_sec
;
4380 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
4381 if (time_before(next_sched
, jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
))
4382 next_sched
= jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
;
4384 ADBG(KERN_DEBUG
"now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
4385 now
, next
, next_sec
, next_sched
);
4386 mod_delayed_work(addrconf_wq
, &addr_chk_work
, next_sched
- now
);
4387 rcu_read_unlock_bh();
4390 static void addrconf_verify_work(struct work_struct
*w
)
4393 addrconf_verify_rtnl();
4397 static void addrconf_verify(void)
4399 mod_delayed_work(addrconf_wq
, &addr_chk_work
, 0);
4402 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
,
4403 struct in6_addr
**peer_pfx
)
4405 struct in6_addr
*pfx
= NULL
;
4410 pfx
= nla_data(addr
);
4413 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
4415 pfx
= nla_data(local
);
4421 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
4422 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
4423 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
4424 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
4425 [IFA_FLAGS
] = { .len
= sizeof(u32
) },
4429 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
4430 struct netlink_ext_ack
*extack
)
4432 struct net
*net
= sock_net(skb
->sk
);
4433 struct ifaddrmsg
*ifm
;
4434 struct nlattr
*tb
[IFA_MAX
+1];
4435 struct in6_addr
*pfx
, *peer_pfx
;
4439 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
,
4444 ifm
= nlmsg_data(nlh
);
4445 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer_pfx
);
4449 ifa_flags
= tb
[IFA_FLAGS
] ? nla_get_u32(tb
[IFA_FLAGS
]) : ifm
->ifa_flags
;
4451 /* We ignore other flags so far. */
4452 ifa_flags
&= IFA_F_MANAGETEMPADDR
;
4454 return inet6_addr_del(net
, ifm
->ifa_index
, ifa_flags
, pfx
,
4455 ifm
->ifa_prefixlen
);
4458 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u32 ifa_flags
,
4459 u32 prefered_lft
, u32 valid_lft
)
4463 unsigned long timeout
;
4464 bool was_managetempaddr
;
4465 bool had_prefixroute
;
4469 if (!valid_lft
|| (prefered_lft
> valid_lft
))
4472 if (ifa_flags
& IFA_F_MANAGETEMPADDR
&&
4473 (ifp
->flags
& IFA_F_TEMPORARY
|| ifp
->prefix_len
!= 64))
4476 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
4477 if (addrconf_finite_timeout(timeout
)) {
4478 expires
= jiffies_to_clock_t(timeout
* HZ
);
4479 valid_lft
= timeout
;
4480 flags
= RTF_EXPIRES
;
4484 ifa_flags
|= IFA_F_PERMANENT
;
4487 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
4488 if (addrconf_finite_timeout(timeout
)) {
4490 ifa_flags
|= IFA_F_DEPRECATED
;
4491 prefered_lft
= timeout
;
4494 spin_lock_bh(&ifp
->lock
);
4495 was_managetempaddr
= ifp
->flags
& IFA_F_MANAGETEMPADDR
;
4496 had_prefixroute
= ifp
->flags
& IFA_F_PERMANENT
&&
4497 !(ifp
->flags
& IFA_F_NOPREFIXROUTE
);
4498 ifp
->flags
&= ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
|
4499 IFA_F_HOMEADDRESS
| IFA_F_MANAGETEMPADDR
|
4500 IFA_F_NOPREFIXROUTE
);
4501 ifp
->flags
|= ifa_flags
;
4502 ifp
->tstamp
= jiffies
;
4503 ifp
->valid_lft
= valid_lft
;
4504 ifp
->prefered_lft
= prefered_lft
;
4506 spin_unlock_bh(&ifp
->lock
);
4507 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
4508 ipv6_ifa_notify(0, ifp
);
4510 if (!(ifa_flags
& IFA_F_NOPREFIXROUTE
)) {
4511 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
4513 } else if (had_prefixroute
) {
4514 enum cleanup_prefix_rt_t action
;
4515 unsigned long rt_expires
;
4517 write_lock_bh(&ifp
->idev
->lock
);
4518 action
= check_cleanup_prefix_route(ifp
, &rt_expires
);
4519 write_unlock_bh(&ifp
->idev
->lock
);
4521 if (action
!= CLEANUP_PREFIX_RT_NOP
) {
4522 cleanup_prefix_route(ifp
, rt_expires
,
4523 action
== CLEANUP_PREFIX_RT_DEL
);
4527 if (was_managetempaddr
|| ifp
->flags
& IFA_F_MANAGETEMPADDR
) {
4528 if (was_managetempaddr
&& !(ifp
->flags
& IFA_F_MANAGETEMPADDR
))
4529 valid_lft
= prefered_lft
= 0;
4530 manage_tempaddrs(ifp
->idev
, ifp
, valid_lft
, prefered_lft
,
4531 !was_managetempaddr
, jiffies
);
4534 addrconf_verify_rtnl();
4540 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
4541 struct netlink_ext_ack
*extack
)
4543 struct net
*net
= sock_net(skb
->sk
);
4544 struct ifaddrmsg
*ifm
;
4545 struct nlattr
*tb
[IFA_MAX
+1];
4546 struct in6_addr
*pfx
, *peer_pfx
;
4547 struct inet6_ifaddr
*ifa
;
4548 struct net_device
*dev
;
4549 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
4553 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
,
4558 ifm
= nlmsg_data(nlh
);
4559 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer_pfx
);
4563 if (tb
[IFA_CACHEINFO
]) {
4564 struct ifa_cacheinfo
*ci
;
4566 ci
= nla_data(tb
[IFA_CACHEINFO
]);
4567 valid_lft
= ci
->ifa_valid
;
4568 preferred_lft
= ci
->ifa_prefered
;
4570 preferred_lft
= INFINITY_LIFE_TIME
;
4571 valid_lft
= INFINITY_LIFE_TIME
;
4574 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
4578 ifa_flags
= tb
[IFA_FLAGS
] ? nla_get_u32(tb
[IFA_FLAGS
]) : ifm
->ifa_flags
;
4580 /* We ignore other flags so far. */
4581 ifa_flags
&= IFA_F_NODAD
| IFA_F_HOMEADDRESS
| IFA_F_MANAGETEMPADDR
|
4582 IFA_F_NOPREFIXROUTE
| IFA_F_MCAUTOJOIN
;
4584 ifa
= ipv6_get_ifaddr(net
, pfx
, dev
, 1);
4587 * It would be best to check for !NLM_F_CREATE here but
4588 * userspace already relies on not having to provide this.
4590 return inet6_addr_add(net
, ifm
->ifa_index
, pfx
, peer_pfx
,
4591 ifm
->ifa_prefixlen
, ifa_flags
,
4592 preferred_lft
, valid_lft
, extack
);
4595 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
4596 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
4599 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
4606 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u32 flags
,
4607 u8 scope
, int ifindex
)
4609 struct ifaddrmsg
*ifm
;
4611 ifm
= nlmsg_data(nlh
);
4612 ifm
->ifa_family
= AF_INET6
;
4613 ifm
->ifa_prefixlen
= prefixlen
;
4614 ifm
->ifa_flags
= flags
;
4615 ifm
->ifa_scope
= scope
;
4616 ifm
->ifa_index
= ifindex
;
4619 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
4620 unsigned long tstamp
, u32 preferred
, u32 valid
)
4622 struct ifa_cacheinfo ci
;
4624 ci
.cstamp
= cstamp_delta(cstamp
);
4625 ci
.tstamp
= cstamp_delta(tstamp
);
4626 ci
.ifa_prefered
= preferred
;
4627 ci
.ifa_valid
= valid
;
4629 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
4632 static inline int rt_scope(int ifa_scope
)
4634 if (ifa_scope
& IFA_HOST
)
4635 return RT_SCOPE_HOST
;
4636 else if (ifa_scope
& IFA_LINK
)
4637 return RT_SCOPE_LINK
;
4638 else if (ifa_scope
& IFA_SITE
)
4639 return RT_SCOPE_SITE
;
4641 return RT_SCOPE_UNIVERSE
;
4644 static inline int inet6_ifaddr_msgsize(void)
4646 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
4647 + nla_total_size(16) /* IFA_LOCAL */
4648 + nla_total_size(16) /* IFA_ADDRESS */
4649 + nla_total_size(sizeof(struct ifa_cacheinfo
))
4650 + nla_total_size(4) /* IFA_FLAGS */;
4653 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
4654 u32 portid
, u32 seq
, int event
, unsigned int flags
)
4656 struct nlmsghdr
*nlh
;
4657 u32 preferred
, valid
;
4659 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
4663 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
4664 ifa
->idev
->dev
->ifindex
);
4666 if (!((ifa
->flags
&IFA_F_PERMANENT
) &&
4667 (ifa
->prefered_lft
== INFINITY_LIFE_TIME
))) {
4668 preferred
= ifa
->prefered_lft
;
4669 valid
= ifa
->valid_lft
;
4670 if (preferred
!= INFINITY_LIFE_TIME
) {
4671 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
4672 if (preferred
> tval
)
4676 if (valid
!= INFINITY_LIFE_TIME
) {
4684 preferred
= INFINITY_LIFE_TIME
;
4685 valid
= INFINITY_LIFE_TIME
;
4688 if (!ipv6_addr_any(&ifa
->peer_addr
)) {
4689 if (nla_put_in6_addr(skb
, IFA_LOCAL
, &ifa
->addr
) < 0 ||
4690 nla_put_in6_addr(skb
, IFA_ADDRESS
, &ifa
->peer_addr
) < 0)
4693 if (nla_put_in6_addr(skb
, IFA_ADDRESS
, &ifa
->addr
) < 0)
4696 if (put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0)
4699 if (nla_put_u32(skb
, IFA_FLAGS
, ifa
->flags
) < 0)
4702 nlmsg_end(skb
, nlh
);
4706 nlmsg_cancel(skb
, nlh
);
4710 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
4711 u32 portid
, u32 seq
, int event
, u16 flags
)
4713 struct nlmsghdr
*nlh
;
4714 u8 scope
= RT_SCOPE_UNIVERSE
;
4715 int ifindex
= ifmca
->idev
->dev
->ifindex
;
4717 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
4718 scope
= RT_SCOPE_SITE
;
4720 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
4724 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
4725 if (nla_put_in6_addr(skb
, IFA_MULTICAST
, &ifmca
->mca_addr
) < 0 ||
4726 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
4727 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
4728 nlmsg_cancel(skb
, nlh
);
4732 nlmsg_end(skb
, nlh
);
4736 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
4737 u32 portid
, u32 seq
, int event
, unsigned int flags
)
4739 struct nlmsghdr
*nlh
;
4740 u8 scope
= RT_SCOPE_UNIVERSE
;
4741 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
4743 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
4744 scope
= RT_SCOPE_SITE
;
4746 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
4750 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
4751 if (nla_put_in6_addr(skb
, IFA_ANYCAST
, &ifaca
->aca_addr
) < 0 ||
4752 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
4753 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
4754 nlmsg_cancel(skb
, nlh
);
4758 nlmsg_end(skb
, nlh
);
4768 /* called with rcu_read_lock() */
4769 static int in6_dump_addrs(struct inet6_dev
*idev
, struct sk_buff
*skb
,
4770 struct netlink_callback
*cb
, enum addr_type_t type
,
4771 int s_ip_idx
, int *p_ip_idx
)
4773 struct ifmcaddr6
*ifmca
;
4774 struct ifacaddr6
*ifaca
;
4776 int ip_idx
= *p_ip_idx
;
4778 read_lock_bh(&idev
->lock
);
4780 case UNICAST_ADDR
: {
4781 struct inet6_ifaddr
*ifa
;
4783 /* unicast address incl. temp addr */
4784 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
4785 if (++ip_idx
< s_ip_idx
)
4787 err
= inet6_fill_ifaddr(skb
, ifa
,
4788 NETLINK_CB(cb
->skb
).portid
,
4794 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
4798 case MULTICAST_ADDR
:
4799 /* multicast address */
4800 for (ifmca
= idev
->mc_list
; ifmca
;
4801 ifmca
= ifmca
->next
, ip_idx
++) {
4802 if (ip_idx
< s_ip_idx
)
4804 err
= inet6_fill_ifmcaddr(skb
, ifmca
,
4805 NETLINK_CB(cb
->skb
).portid
,
4814 /* anycast address */
4815 for (ifaca
= idev
->ac_list
; ifaca
;
4816 ifaca
= ifaca
->aca_next
, ip_idx
++) {
4817 if (ip_idx
< s_ip_idx
)
4819 err
= inet6_fill_ifacaddr(skb
, ifaca
,
4820 NETLINK_CB(cb
->skb
).portid
,
4831 read_unlock_bh(&idev
->lock
);
4836 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
4837 enum addr_type_t type
)
4839 struct net
*net
= sock_net(skb
->sk
);
4842 int s_idx
, s_ip_idx
;
4843 struct net_device
*dev
;
4844 struct inet6_dev
*idev
;
4845 struct hlist_head
*head
;
4848 s_idx
= idx
= cb
->args
[1];
4849 s_ip_idx
= ip_idx
= cb
->args
[2];
4852 cb
->seq
= atomic_read(&net
->ipv6
.dev_addr_genid
) ^ net
->dev_base_seq
;
4853 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
4855 head
= &net
->dev_index_head
[h
];
4856 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
4859 if (h
> s_h
|| idx
> s_idx
)
4862 idev
= __in6_dev_get(dev
);
4866 if (in6_dump_addrs(idev
, skb
, cb
, type
,
4867 s_ip_idx
, &ip_idx
) < 0)
4877 cb
->args
[2] = ip_idx
;
4882 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4884 enum addr_type_t type
= UNICAST_ADDR
;
4886 return inet6_dump_addr(skb
, cb
, type
);
4889 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4891 enum addr_type_t type
= MULTICAST_ADDR
;
4893 return inet6_dump_addr(skb
, cb
, type
);
4897 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4899 enum addr_type_t type
= ANYCAST_ADDR
;
4901 return inet6_dump_addr(skb
, cb
, type
);
4904 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
*nlh
,
4905 struct netlink_ext_ack
*extack
)
4907 struct net
*net
= sock_net(in_skb
->sk
);
4908 struct ifaddrmsg
*ifm
;
4909 struct nlattr
*tb
[IFA_MAX
+1];
4910 struct in6_addr
*addr
= NULL
, *peer
;
4911 struct net_device
*dev
= NULL
;
4912 struct inet6_ifaddr
*ifa
;
4913 struct sk_buff
*skb
;
4916 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
,
4921 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer
);
4925 ifm
= nlmsg_data(nlh
);
4927 dev
= dev_get_by_index(net
, ifm
->ifa_index
);
4929 ifa
= ipv6_get_ifaddr(net
, addr
, dev
, 1);
4931 err
= -EADDRNOTAVAIL
;
4935 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
);
4941 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).portid
,
4942 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
4944 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4945 WARN_ON(err
== -EMSGSIZE
);
4949 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).portid
);
4958 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
4960 struct sk_buff
*skb
;
4961 struct net
*net
= dev_net(ifa
->idev
->dev
);
4964 /* Don't send DELADDR notification for TENTATIVE address,
4965 * since NEWADDR notification is sent only after removing
4966 * TENTATIVE flag, if DAD has not failed.
4968 if (ifa
->flags
& IFA_F_TENTATIVE
&& !(ifa
->flags
& IFA_F_DADFAILED
) &&
4969 event
== RTM_DELADDR
)
4972 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
4976 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
4978 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4979 WARN_ON(err
== -EMSGSIZE
);
4983 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
4987 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
4990 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
4991 __s32
*array
, int bytes
)
4993 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
4995 memset(array
, 0, bytes
);
4996 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
4997 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
4998 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
4999 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
5000 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
5001 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
5002 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
5003 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
5004 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] =
5005 jiffies_to_msecs(cnf
->rtr_solicit_interval
);
5006 array
[DEVCONF_RTR_SOLICIT_MAX_INTERVAL
] =
5007 jiffies_to_msecs(cnf
->rtr_solicit_max_interval
);
5008 array
[DEVCONF_RTR_SOLICIT_DELAY
] =
5009 jiffies_to_msecs(cnf
->rtr_solicit_delay
);
5010 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
5011 array
[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL
] =
5012 jiffies_to_msecs(cnf
->mldv1_unsolicited_report_interval
);
5013 array
[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL
] =
5014 jiffies_to_msecs(cnf
->mldv2_unsolicited_report_interval
);
5015 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
5016 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
5017 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
5018 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
5019 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
5020 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
5021 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
5022 array
[DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT
] = cnf
->accept_ra_min_hop_limit
;
5023 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
5024 #ifdef CONFIG_IPV6_ROUTER_PREF
5025 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
5026 array
[DEVCONF_RTR_PROBE_INTERVAL
] =
5027 jiffies_to_msecs(cnf
->rtr_probe_interval
);
5028 #ifdef CONFIG_IPV6_ROUTE_INFO
5029 array
[DEVCONF_ACCEPT_RA_RT_INFO_MIN_PLEN
] = cnf
->accept_ra_rt_info_min_plen
;
5030 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
5033 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
5034 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
5035 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
5036 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
5037 array
[DEVCONF_USE_OPTIMISTIC
] = cnf
->use_optimistic
;
5039 #ifdef CONFIG_IPV6_MROUTE
5040 array
[DEVCONF_MC_FORWARDING
] = cnf
->mc_forwarding
;
5042 array
[DEVCONF_DISABLE_IPV6
] = cnf
->disable_ipv6
;
5043 array
[DEVCONF_ACCEPT_DAD
] = cnf
->accept_dad
;
5044 array
[DEVCONF_FORCE_TLLAO
] = cnf
->force_tllao
;
5045 array
[DEVCONF_NDISC_NOTIFY
] = cnf
->ndisc_notify
;
5046 array
[DEVCONF_SUPPRESS_FRAG_NDISC
] = cnf
->suppress_frag_ndisc
;
5047 array
[DEVCONF_ACCEPT_RA_FROM_LOCAL
] = cnf
->accept_ra_from_local
;
5048 array
[DEVCONF_ACCEPT_RA_MTU
] = cnf
->accept_ra_mtu
;
5049 array
[DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN
] = cnf
->ignore_routes_with_linkdown
;
5050 /* we omit DEVCONF_STABLE_SECRET for now */
5051 array
[DEVCONF_USE_OIF_ADDRS_ONLY
] = cnf
->use_oif_addrs_only
;
5052 array
[DEVCONF_DROP_UNICAST_IN_L2_MULTICAST
] = cnf
->drop_unicast_in_l2_multicast
;
5053 array
[DEVCONF_DROP_UNSOLICITED_NA
] = cnf
->drop_unsolicited_na
;
5054 array
[DEVCONF_KEEP_ADDR_ON_DOWN
] = cnf
->keep_addr_on_down
;
5055 array
[DEVCONF_SEG6_ENABLED
] = cnf
->seg6_enabled
;
5056 #ifdef CONFIG_IPV6_SEG6_HMAC
5057 array
[DEVCONF_SEG6_REQUIRE_HMAC
] = cnf
->seg6_require_hmac
;
5059 array
[DEVCONF_ENHANCED_DAD
] = cnf
->enhanced_dad
;
5060 array
[DEVCONF_ADDR_GEN_MODE
] = cnf
->addr_gen_mode
;
5061 array
[DEVCONF_DISABLE_POLICY
] = cnf
->disable_policy
;
5062 array
[DEVCONF_NDISC_TCLASS
] = cnf
->ndisc_tclass
;
5065 static inline size_t inet6_ifla6_size(void)
5067 return nla_total_size(4) /* IFLA_INET6_FLAGS */
5068 + nla_total_size(sizeof(struct ifla_cacheinfo
))
5069 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
5070 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
5071 + nla_total_size(ICMP6_MIB_MAX
* 8) /* IFLA_INET6_ICMP6STATS */
5072 + nla_total_size(sizeof(struct in6_addr
)); /* IFLA_INET6_TOKEN */
5075 static inline size_t inet6_if_nlmsg_size(void)
5077 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
5078 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
5079 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
5080 + nla_total_size(4) /* IFLA_MTU */
5081 + nla_total_size(4) /* IFLA_LINK */
5082 + nla_total_size(1) /* IFLA_OPERSTATE */
5083 + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
5086 static inline void __snmp6_fill_statsdev(u64
*stats
, atomic_long_t
*mib
,
5090 int pad
= bytes
- sizeof(u64
) * ICMP6_MIB_MAX
;
5093 /* Use put_unaligned() because stats may not be aligned for u64. */
5094 put_unaligned(ICMP6_MIB_MAX
, &stats
[0]);
5095 for (i
= 1; i
< ICMP6_MIB_MAX
; i
++)
5096 put_unaligned(atomic_long_read(&mib
[i
]), &stats
[i
]);
5098 memset(&stats
[ICMP6_MIB_MAX
], 0, pad
);
5101 static inline void __snmp6_fill_stats64(u64
*stats
, void __percpu
*mib
,
5102 int bytes
, size_t syncpoff
)
5105 u64 buff
[IPSTATS_MIB_MAX
];
5106 int pad
= bytes
- sizeof(u64
) * IPSTATS_MIB_MAX
;
5110 memset(buff
, 0, sizeof(buff
));
5111 buff
[0] = IPSTATS_MIB_MAX
;
5113 for_each_possible_cpu(c
) {
5114 for (i
= 1; i
< IPSTATS_MIB_MAX
; i
++)
5115 buff
[i
] += snmp_get_cpu_field64(mib
, c
, i
, syncpoff
);
5118 memcpy(stats
, buff
, IPSTATS_MIB_MAX
* sizeof(u64
));
5119 memset(&stats
[IPSTATS_MIB_MAX
], 0, pad
);
5122 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
5126 case IFLA_INET6_STATS
:
5127 __snmp6_fill_stats64(stats
, idev
->stats
.ipv6
, bytes
,
5128 offsetof(struct ipstats_mib
, syncp
));
5130 case IFLA_INET6_ICMP6STATS
:
5131 __snmp6_fill_statsdev(stats
, idev
->stats
.icmpv6dev
->mibs
, bytes
);
5136 static int inet6_fill_ifla6_attrs(struct sk_buff
*skb
, struct inet6_dev
*idev
,
5137 u32 ext_filter_mask
)
5140 struct ifla_cacheinfo ci
;
5142 if (nla_put_u32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
))
5143 goto nla_put_failure
;
5144 ci
.max_reasm_len
= IPV6_MAXPLEN
;
5145 ci
.tstamp
= cstamp_delta(idev
->tstamp
);
5146 ci
.reachable_time
= jiffies_to_msecs(idev
->nd_parms
->reachable_time
);
5147 ci
.retrans_time
= jiffies_to_msecs(NEIGH_VAR(idev
->nd_parms
, RETRANS_TIME
));
5148 if (nla_put(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
))
5149 goto nla_put_failure
;
5150 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
5152 goto nla_put_failure
;
5153 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
5155 /* XXX - MC not implemented */
5157 if (ext_filter_mask
& RTEXT_FILTER_SKIP_STATS
)
5160 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
5162 goto nla_put_failure
;
5163 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
5165 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
5167 goto nla_put_failure
;
5168 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
5170 nla
= nla_reserve(skb
, IFLA_INET6_TOKEN
, sizeof(struct in6_addr
));
5172 goto nla_put_failure
;
5174 if (nla_put_u8(skb
, IFLA_INET6_ADDR_GEN_MODE
, idev
->cnf
.addr_gen_mode
))
5175 goto nla_put_failure
;
5177 read_lock_bh(&idev
->lock
);
5178 memcpy(nla_data(nla
), idev
->token
.s6_addr
, nla_len(nla
));
5179 read_unlock_bh(&idev
->lock
);
5187 static size_t inet6_get_link_af_size(const struct net_device
*dev
,
5188 u32 ext_filter_mask
)
5190 if (!__in6_dev_get(dev
))
5193 return inet6_ifla6_size();
5196 static int inet6_fill_link_af(struct sk_buff
*skb
, const struct net_device
*dev
,
5197 u32 ext_filter_mask
)
5199 struct inet6_dev
*idev
= __in6_dev_get(dev
);
5204 if (inet6_fill_ifla6_attrs(skb
, idev
, ext_filter_mask
) < 0)
5210 static int inet6_set_iftoken(struct inet6_dev
*idev
, struct in6_addr
*token
)
5212 struct inet6_ifaddr
*ifp
;
5213 struct net_device
*dev
= idev
->dev
;
5214 bool clear_token
, update_rs
= false;
5215 struct in6_addr ll_addr
;
5221 if (dev
->flags
& (IFF_LOOPBACK
| IFF_NOARP
))
5223 if (!ipv6_accept_ra(idev
))
5225 if (idev
->cnf
.rtr_solicits
== 0)
5228 write_lock_bh(&idev
->lock
);
5230 BUILD_BUG_ON(sizeof(token
->s6_addr
) != 16);
5231 memcpy(idev
->token
.s6_addr
+ 8, token
->s6_addr
+ 8, 8);
5233 write_unlock_bh(&idev
->lock
);
5235 clear_token
= ipv6_addr_any(token
);
5239 if (!idev
->dead
&& (idev
->if_flags
& IF_READY
) &&
5240 !ipv6_get_lladdr(dev
, &ll_addr
, IFA_F_TENTATIVE
|
5241 IFA_F_OPTIMISTIC
)) {
5242 /* If we're not ready, then normal ifup will take care
5243 * of this. Otherwise, we need to request our rs here.
5245 ndisc_send_rs(dev
, &ll_addr
, &in6addr_linklocal_allrouters
);
5250 write_lock_bh(&idev
->lock
);
5253 idev
->if_flags
|= IF_RS_SENT
;
5254 idev
->rs_interval
= rfc3315_s14_backoff_init(
5255 idev
->cnf
.rtr_solicit_interval
);
5256 idev
->rs_probes
= 1;
5257 addrconf_mod_rs_timer(idev
, idev
->rs_interval
);
5260 /* Well, that's kinda nasty ... */
5261 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
5262 spin_lock(&ifp
->lock
);
5263 if (ifp
->tokenized
) {
5265 ifp
->prefered_lft
= 0;
5267 spin_unlock(&ifp
->lock
);
5270 write_unlock_bh(&idev
->lock
);
5271 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
5272 addrconf_verify_rtnl();
5276 static const struct nla_policy inet6_af_policy
[IFLA_INET6_MAX
+ 1] = {
5277 [IFLA_INET6_ADDR_GEN_MODE
] = { .type
= NLA_U8
},
5278 [IFLA_INET6_TOKEN
] = { .len
= sizeof(struct in6_addr
) },
5281 static int inet6_validate_link_af(const struct net_device
*dev
,
5282 const struct nlattr
*nla
)
5284 struct nlattr
*tb
[IFLA_INET6_MAX
+ 1];
5286 if (dev
&& !__in6_dev_get(dev
))
5287 return -EAFNOSUPPORT
;
5289 return nla_parse_nested(tb
, IFLA_INET6_MAX
, nla
, inet6_af_policy
,
5293 static int check_addr_gen_mode(int mode
)
5295 if (mode
!= IN6_ADDR_GEN_MODE_EUI64
&&
5296 mode
!= IN6_ADDR_GEN_MODE_NONE
&&
5297 mode
!= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
&&
5298 mode
!= IN6_ADDR_GEN_MODE_RANDOM
)
5303 static int check_stable_privacy(struct inet6_dev
*idev
, struct net
*net
,
5306 if (mode
== IN6_ADDR_GEN_MODE_STABLE_PRIVACY
&&
5307 !idev
->cnf
.stable_secret
.initialized
&&
5308 !net
->ipv6
.devconf_dflt
->stable_secret
.initialized
)
5313 static int inet6_set_link_af(struct net_device
*dev
, const struct nlattr
*nla
)
5316 struct inet6_dev
*idev
= __in6_dev_get(dev
);
5317 struct nlattr
*tb
[IFLA_INET6_MAX
+ 1];
5320 return -EAFNOSUPPORT
;
5322 if (nla_parse_nested(tb
, IFLA_INET6_MAX
, nla
, NULL
, NULL
) < 0)
5325 if (tb
[IFLA_INET6_TOKEN
]) {
5326 err
= inet6_set_iftoken(idev
, nla_data(tb
[IFLA_INET6_TOKEN
]));
5331 if (tb
[IFLA_INET6_ADDR_GEN_MODE
]) {
5332 u8 mode
= nla_get_u8(tb
[IFLA_INET6_ADDR_GEN_MODE
]);
5334 if (check_addr_gen_mode(mode
) < 0 ||
5335 check_stable_privacy(idev
, dev_net(dev
), mode
) < 0)
5338 idev
->cnf
.addr_gen_mode
= mode
;
5345 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
5346 u32 portid
, u32 seq
, int event
, unsigned int flags
)
5348 struct net_device
*dev
= idev
->dev
;
5349 struct ifinfomsg
*hdr
;
5350 struct nlmsghdr
*nlh
;
5353 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*hdr
), flags
);
5357 hdr
= nlmsg_data(nlh
);
5358 hdr
->ifi_family
= AF_INET6
;
5360 hdr
->ifi_type
= dev
->type
;
5361 hdr
->ifi_index
= dev
->ifindex
;
5362 hdr
->ifi_flags
= dev_get_flags(dev
);
5363 hdr
->ifi_change
= 0;
5365 if (nla_put_string(skb
, IFLA_IFNAME
, dev
->name
) ||
5367 nla_put(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
)) ||
5368 nla_put_u32(skb
, IFLA_MTU
, dev
->mtu
) ||
5369 (dev
->ifindex
!= dev_get_iflink(dev
) &&
5370 nla_put_u32(skb
, IFLA_LINK
, dev_get_iflink(dev
))) ||
5371 nla_put_u8(skb
, IFLA_OPERSTATE
,
5372 netif_running(dev
) ? dev
->operstate
: IF_OPER_DOWN
))
5373 goto nla_put_failure
;
5374 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
5376 goto nla_put_failure
;
5378 if (inet6_fill_ifla6_attrs(skb
, idev
, 0) < 0)
5379 goto nla_put_failure
;
5381 nla_nest_end(skb
, protoinfo
);
5382 nlmsg_end(skb
, nlh
);
5386 nlmsg_cancel(skb
, nlh
);
5390 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
5392 struct net
*net
= sock_net(skb
->sk
);
5395 struct net_device
*dev
;
5396 struct inet6_dev
*idev
;
5397 struct hlist_head
*head
;
5400 s_idx
= cb
->args
[1];
5403 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
5405 head
= &net
->dev_index_head
[h
];
5406 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
5409 idev
= __in6_dev_get(dev
);
5412 if (inet6_fill_ifinfo(skb
, idev
,
5413 NETLINK_CB(cb
->skb
).portid
,
5415 RTM_NEWLINK
, NLM_F_MULTI
) < 0)
5429 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
5431 struct sk_buff
*skb
;
5432 struct net
*net
= dev_net(idev
->dev
);
5435 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
5439 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
5441 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
5442 WARN_ON(err
== -EMSGSIZE
);
5446 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFINFO
, NULL
, GFP_ATOMIC
);
5450 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFINFO
, err
);
5453 static inline size_t inet6_prefix_nlmsg_size(void)
5455 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
5456 + nla_total_size(sizeof(struct in6_addr
))
5457 + nla_total_size(sizeof(struct prefix_cacheinfo
));
5460 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
5461 struct prefix_info
*pinfo
, u32 portid
, u32 seq
,
5462 int event
, unsigned int flags
)
5464 struct prefixmsg
*pmsg
;
5465 struct nlmsghdr
*nlh
;
5466 struct prefix_cacheinfo ci
;
5468 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*pmsg
), flags
);
5472 pmsg
= nlmsg_data(nlh
);
5473 pmsg
->prefix_family
= AF_INET6
;
5474 pmsg
->prefix_pad1
= 0;
5475 pmsg
->prefix_pad2
= 0;
5476 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
5477 pmsg
->prefix_len
= pinfo
->prefix_len
;
5478 pmsg
->prefix_type
= pinfo
->type
;
5479 pmsg
->prefix_pad3
= 0;
5480 pmsg
->prefix_flags
= 0;
5482 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
5483 if (pinfo
->autoconf
)
5484 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
5486 if (nla_put(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
))
5487 goto nla_put_failure
;
5488 ci
.preferred_time
= ntohl(pinfo
->prefered
);
5489 ci
.valid_time
= ntohl(pinfo
->valid
);
5490 if (nla_put(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
))
5491 goto nla_put_failure
;
5492 nlmsg_end(skb
, nlh
);
5496 nlmsg_cancel(skb
, nlh
);
5500 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
5501 struct prefix_info
*pinfo
)
5503 struct sk_buff
*skb
;
5504 struct net
*net
= dev_net(idev
->dev
);
5507 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
5511 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
5513 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
5514 WARN_ON(err
== -EMSGSIZE
);
5518 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
5522 rtnl_set_sk_err(net
, RTNLGRP_IPV6_PREFIX
, err
);
5525 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
5527 struct net
*net
= dev_net(ifp
->idev
->dev
);
5532 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
5537 * If the address was optimistic
5538 * we inserted the route at the start of
5539 * our DAD process, so we don't need
5542 if (!rcu_access_pointer(ifp
->rt
->rt6i_node
))
5543 ip6_ins_rt(ifp
->rt
);
5544 if (ifp
->idev
->cnf
.forwarding
)
5545 addrconf_join_anycast(ifp
);
5546 if (!ipv6_addr_any(&ifp
->peer_addr
))
5547 addrconf_prefix_route(&ifp
->peer_addr
, 128,
5548 ifp
->idev
->dev
, 0, 0);
5551 if (ifp
->idev
->cnf
.forwarding
)
5552 addrconf_leave_anycast(ifp
);
5553 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
5554 if (!ipv6_addr_any(&ifp
->peer_addr
)) {
5555 struct rt6_info
*rt
;
5557 rt
= addrconf_get_prefix_route(&ifp
->peer_addr
, 128,
5558 ifp
->idev
->dev
, 0, 0);
5563 if (dst_hold_safe(&ifp
->rt
->dst
))
5564 ip6_del_rt(ifp
->rt
);
5566 rt_genid_bump_ipv6(net
);
5569 atomic_inc(&net
->ipv6
.dev_addr_genid
);
5572 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
5575 if (likely(ifp
->idev
->dead
== 0))
5576 __ipv6_ifa_notify(event
, ifp
);
5577 rcu_read_unlock_bh();
5580 #ifdef CONFIG_SYSCTL
5583 int addrconf_sysctl_forward(struct ctl_table
*ctl
, int write
,
5584 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
5586 int *valp
= ctl
->data
;
5589 struct ctl_table lctl
;
5593 * ctl->data points to idev->cnf.forwarding, we should
5594 * not modify it until we get the rtnl lock.
5599 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
5602 ret
= addrconf_fixup_forwarding(ctl
, valp
, val
);
5609 int addrconf_sysctl_mtu(struct ctl_table
*ctl
, int write
,
5610 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
5612 struct inet6_dev
*idev
= ctl
->extra1
;
5613 int min_mtu
= IPV6_MIN_MTU
;
5614 struct ctl_table lctl
;
5617 lctl
.extra1
= &min_mtu
;
5618 lctl
.extra2
= idev
? &idev
->dev
->mtu
: NULL
;
5620 return proc_dointvec_minmax(&lctl
, write
, buffer
, lenp
, ppos
);
5623 static void dev_disable_change(struct inet6_dev
*idev
)
5625 struct netdev_notifier_info info
;
5627 if (!idev
|| !idev
->dev
)
5630 netdev_notifier_info_init(&info
, idev
->dev
);
5631 if (idev
->cnf
.disable_ipv6
)
5632 addrconf_notify(NULL
, NETDEV_DOWN
, &info
);
5634 addrconf_notify(NULL
, NETDEV_UP
, &info
);
5637 static void addrconf_disable_change(struct net
*net
, __s32 newf
)
5639 struct net_device
*dev
;
5640 struct inet6_dev
*idev
;
5642 for_each_netdev(net
, dev
) {
5643 idev
= __in6_dev_get(dev
);
5645 int changed
= (!idev
->cnf
.disable_ipv6
) ^ (!newf
);
5646 idev
->cnf
.disable_ipv6
= newf
;
5648 dev_disable_change(idev
);
5653 static int addrconf_disable_ipv6(struct ctl_table
*table
, int *p
, int newf
)
5658 if (!rtnl_trylock())
5659 return restart_syscall();
5661 net
= (struct net
*)table
->extra2
;
5665 if (p
== &net
->ipv6
.devconf_dflt
->disable_ipv6
) {
5670 if (p
== &net
->ipv6
.devconf_all
->disable_ipv6
) {
5671 net
->ipv6
.devconf_dflt
->disable_ipv6
= newf
;
5672 addrconf_disable_change(net
, newf
);
5673 } else if ((!newf
) ^ (!old
))
5674 dev_disable_change((struct inet6_dev
*)table
->extra1
);
5681 int addrconf_sysctl_disable(struct ctl_table
*ctl
, int write
,
5682 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
5684 int *valp
= ctl
->data
;
5687 struct ctl_table lctl
;
5691 * ctl->data points to idev->cnf.disable_ipv6, we should
5692 * not modify it until we get the rtnl lock.
5697 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
5700 ret
= addrconf_disable_ipv6(ctl
, valp
, val
);
5707 int addrconf_sysctl_proxy_ndp(struct ctl_table
*ctl
, int write
,
5708 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
5710 int *valp
= ctl
->data
;
5715 ret
= proc_dointvec(ctl
, write
, buffer
, lenp
, ppos
);
5718 if (write
&& old
!= new) {
5719 struct net
*net
= ctl
->extra2
;
5721 if (!rtnl_trylock())
5722 return restart_syscall();
5724 if (valp
== &net
->ipv6
.devconf_dflt
->proxy_ndp
)
5725 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
5726 NETCONFA_PROXY_NEIGH
,
5727 NETCONFA_IFINDEX_DEFAULT
,
5728 net
->ipv6
.devconf_dflt
);
5729 else if (valp
== &net
->ipv6
.devconf_all
->proxy_ndp
)
5730 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
5731 NETCONFA_PROXY_NEIGH
,
5732 NETCONFA_IFINDEX_ALL
,
5733 net
->ipv6
.devconf_all
);
5735 struct inet6_dev
*idev
= ctl
->extra1
;
5737 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
5738 NETCONFA_PROXY_NEIGH
,
5748 static int addrconf_sysctl_addr_gen_mode(struct ctl_table
*ctl
, int write
,
5749 void __user
*buffer
, size_t *lenp
,
5754 struct inet6_dev
*idev
= (struct inet6_dev
*)ctl
->extra1
;
5755 struct net
*net
= (struct net
*)ctl
->extra2
;
5757 if (!rtnl_trylock())
5758 return restart_syscall();
5760 ret
= proc_dointvec(ctl
, write
, buffer
, lenp
, ppos
);
5763 new_val
= *((int *)ctl
->data
);
5765 if (check_addr_gen_mode(new_val
) < 0) {
5770 /* request for default */
5771 if (&net
->ipv6
.devconf_dflt
->addr_gen_mode
== ctl
->data
) {
5772 ipv6_devconf_dflt
.addr_gen_mode
= new_val
;
5774 /* request for individual net device */
5779 if (check_stable_privacy(idev
, net
, new_val
) < 0) {
5784 if (idev
->cnf
.addr_gen_mode
!= new_val
) {
5785 idev
->cnf
.addr_gen_mode
= new_val
;
5786 addrconf_dev_config(idev
->dev
);
5797 static int addrconf_sysctl_stable_secret(struct ctl_table
*ctl
, int write
,
5798 void __user
*buffer
, size_t *lenp
,
5802 struct in6_addr addr
;
5803 char str
[IPV6_MAX_STRLEN
];
5804 struct ctl_table lctl
= *ctl
;
5805 struct net
*net
= ctl
->extra2
;
5806 struct ipv6_stable_secret
*secret
= ctl
->data
;
5808 if (&net
->ipv6
.devconf_all
->stable_secret
== ctl
->data
)
5811 lctl
.maxlen
= IPV6_MAX_STRLEN
;
5814 if (!rtnl_trylock())
5815 return restart_syscall();
5817 if (!write
&& !secret
->initialized
) {
5822 err
= snprintf(str
, sizeof(str
), "%pI6", &secret
->secret
);
5823 if (err
>= sizeof(str
)) {
5828 err
= proc_dostring(&lctl
, write
, buffer
, lenp
, ppos
);
5832 if (in6_pton(str
, -1, addr
.in6_u
.u6_addr8
, -1, NULL
) != 1) {
5837 secret
->initialized
= true;
5838 secret
->secret
= addr
;
5840 if (&net
->ipv6
.devconf_dflt
->stable_secret
== ctl
->data
) {
5841 struct net_device
*dev
;
5843 for_each_netdev(net
, dev
) {
5844 struct inet6_dev
*idev
= __in6_dev_get(dev
);
5847 idev
->cnf
.addr_gen_mode
=
5848 IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
5852 struct inet6_dev
*idev
= ctl
->extra1
;
5854 idev
->cnf
.addr_gen_mode
= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
5864 int addrconf_sysctl_ignore_routes_with_linkdown(struct ctl_table
*ctl
,
5866 void __user
*buffer
,
5870 int *valp
= ctl
->data
;
5873 struct ctl_table lctl
;
5876 /* ctl->data points to idev->cnf.ignore_routes_when_linkdown
5877 * we should not modify it until we get the rtnl lock.
5882 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
5885 ret
= addrconf_fixup_linkdown(ctl
, valp
, val
);
5892 void addrconf_set_nopolicy(struct rt6_info
*rt
, int action
)
5896 rt
->dst
.flags
|= DST_NOPOLICY
;
5898 rt
->dst
.flags
&= ~DST_NOPOLICY
;
5903 void addrconf_disable_policy_idev(struct inet6_dev
*idev
, int val
)
5905 struct inet6_ifaddr
*ifa
;
5907 read_lock_bh(&idev
->lock
);
5908 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
5909 spin_lock(&ifa
->lock
);
5911 struct rt6_info
*rt
= ifa
->rt
;
5915 addrconf_set_nopolicy(ifa
->rt
, val
);
5916 if (rt
->rt6i_pcpu
) {
5917 for_each_possible_cpu(cpu
) {
5918 struct rt6_info
**rtp
;
5920 rtp
= per_cpu_ptr(rt
->rt6i_pcpu
, cpu
);
5921 addrconf_set_nopolicy(*rtp
, val
);
5926 spin_unlock(&ifa
->lock
);
5928 read_unlock_bh(&idev
->lock
);
5932 int addrconf_disable_policy(struct ctl_table
*ctl
, int *valp
, int val
)
5934 struct inet6_dev
*idev
;
5937 if (!rtnl_trylock())
5938 return restart_syscall();
5942 net
= (struct net
*)ctl
->extra2
;
5943 if (valp
== &net
->ipv6
.devconf_dflt
->disable_policy
) {
5948 if (valp
== &net
->ipv6
.devconf_all
->disable_policy
) {
5949 struct net_device
*dev
;
5951 for_each_netdev(net
, dev
) {
5952 idev
= __in6_dev_get(dev
);
5954 addrconf_disable_policy_idev(idev
, val
);
5957 idev
= (struct inet6_dev
*)ctl
->extra1
;
5958 addrconf_disable_policy_idev(idev
, val
);
5966 int addrconf_sysctl_disable_policy(struct ctl_table
*ctl
, int write
,
5967 void __user
*buffer
, size_t *lenp
,
5970 int *valp
= ctl
->data
;
5973 struct ctl_table lctl
;
5978 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
5980 if (write
&& (*valp
!= val
))
5981 ret
= addrconf_disable_policy(ctl
, valp
, val
);
5989 static int minus_one
= -1;
5990 static const int zero
= 0;
5991 static const int one
= 1;
5992 static const int two_five_five
= 255;
5994 static const struct ctl_table addrconf_sysctl
[] = {
5996 .procname
= "forwarding",
5997 .data
= &ipv6_devconf
.forwarding
,
5998 .maxlen
= sizeof(int),
6000 .proc_handler
= addrconf_sysctl_forward
,
6003 .procname
= "hop_limit",
6004 .data
= &ipv6_devconf
.hop_limit
,
6005 .maxlen
= sizeof(int),
6007 .proc_handler
= proc_dointvec_minmax
,
6008 .extra1
= (void *)&one
,
6009 .extra2
= (void *)&two_five_five
,
6013 .data
= &ipv6_devconf
.mtu6
,
6014 .maxlen
= sizeof(int),
6016 .proc_handler
= addrconf_sysctl_mtu
,
6019 .procname
= "accept_ra",
6020 .data
= &ipv6_devconf
.accept_ra
,
6021 .maxlen
= sizeof(int),
6023 .proc_handler
= proc_dointvec
,
6026 .procname
= "accept_redirects",
6027 .data
= &ipv6_devconf
.accept_redirects
,
6028 .maxlen
= sizeof(int),
6030 .proc_handler
= proc_dointvec
,
6033 .procname
= "autoconf",
6034 .data
= &ipv6_devconf
.autoconf
,
6035 .maxlen
= sizeof(int),
6037 .proc_handler
= proc_dointvec
,
6040 .procname
= "dad_transmits",
6041 .data
= &ipv6_devconf
.dad_transmits
,
6042 .maxlen
= sizeof(int),
6044 .proc_handler
= proc_dointvec
,
6047 .procname
= "router_solicitations",
6048 .data
= &ipv6_devconf
.rtr_solicits
,
6049 .maxlen
= sizeof(int),
6051 .proc_handler
= proc_dointvec_minmax
,
6052 .extra1
= &minus_one
,
6055 .procname
= "router_solicitation_interval",
6056 .data
= &ipv6_devconf
.rtr_solicit_interval
,
6057 .maxlen
= sizeof(int),
6059 .proc_handler
= proc_dointvec_jiffies
,
6062 .procname
= "router_solicitation_max_interval",
6063 .data
= &ipv6_devconf
.rtr_solicit_max_interval
,
6064 .maxlen
= sizeof(int),
6066 .proc_handler
= proc_dointvec_jiffies
,
6069 .procname
= "router_solicitation_delay",
6070 .data
= &ipv6_devconf
.rtr_solicit_delay
,
6071 .maxlen
= sizeof(int),
6073 .proc_handler
= proc_dointvec_jiffies
,
6076 .procname
= "force_mld_version",
6077 .data
= &ipv6_devconf
.force_mld_version
,
6078 .maxlen
= sizeof(int),
6080 .proc_handler
= proc_dointvec
,
6083 .procname
= "mldv1_unsolicited_report_interval",
6085 &ipv6_devconf
.mldv1_unsolicited_report_interval
,
6086 .maxlen
= sizeof(int),
6088 .proc_handler
= proc_dointvec_ms_jiffies
,
6091 .procname
= "mldv2_unsolicited_report_interval",
6093 &ipv6_devconf
.mldv2_unsolicited_report_interval
,
6094 .maxlen
= sizeof(int),
6096 .proc_handler
= proc_dointvec_ms_jiffies
,
6099 .procname
= "use_tempaddr",
6100 .data
= &ipv6_devconf
.use_tempaddr
,
6101 .maxlen
= sizeof(int),
6103 .proc_handler
= proc_dointvec
,
6106 .procname
= "temp_valid_lft",
6107 .data
= &ipv6_devconf
.temp_valid_lft
,
6108 .maxlen
= sizeof(int),
6110 .proc_handler
= proc_dointvec
,
6113 .procname
= "temp_prefered_lft",
6114 .data
= &ipv6_devconf
.temp_prefered_lft
,
6115 .maxlen
= sizeof(int),
6117 .proc_handler
= proc_dointvec
,
6120 .procname
= "regen_max_retry",
6121 .data
= &ipv6_devconf
.regen_max_retry
,
6122 .maxlen
= sizeof(int),
6124 .proc_handler
= proc_dointvec
,
6127 .procname
= "max_desync_factor",
6128 .data
= &ipv6_devconf
.max_desync_factor
,
6129 .maxlen
= sizeof(int),
6131 .proc_handler
= proc_dointvec
,
6134 .procname
= "max_addresses",
6135 .data
= &ipv6_devconf
.max_addresses
,
6136 .maxlen
= sizeof(int),
6138 .proc_handler
= proc_dointvec
,
6141 .procname
= "accept_ra_defrtr",
6142 .data
= &ipv6_devconf
.accept_ra_defrtr
,
6143 .maxlen
= sizeof(int),
6145 .proc_handler
= proc_dointvec
,
6148 .procname
= "accept_ra_min_hop_limit",
6149 .data
= &ipv6_devconf
.accept_ra_min_hop_limit
,
6150 .maxlen
= sizeof(int),
6152 .proc_handler
= proc_dointvec
,
6155 .procname
= "accept_ra_pinfo",
6156 .data
= &ipv6_devconf
.accept_ra_pinfo
,
6157 .maxlen
= sizeof(int),
6159 .proc_handler
= proc_dointvec
,
6161 #ifdef CONFIG_IPV6_ROUTER_PREF
6163 .procname
= "accept_ra_rtr_pref",
6164 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
6165 .maxlen
= sizeof(int),
6167 .proc_handler
= proc_dointvec
,
6170 .procname
= "router_probe_interval",
6171 .data
= &ipv6_devconf
.rtr_probe_interval
,
6172 .maxlen
= sizeof(int),
6174 .proc_handler
= proc_dointvec_jiffies
,
6176 #ifdef CONFIG_IPV6_ROUTE_INFO
6178 .procname
= "accept_ra_rt_info_min_plen",
6179 .data
= &ipv6_devconf
.accept_ra_rt_info_min_plen
,
6180 .maxlen
= sizeof(int),
6182 .proc_handler
= proc_dointvec
,
6185 .procname
= "accept_ra_rt_info_max_plen",
6186 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
6187 .maxlen
= sizeof(int),
6189 .proc_handler
= proc_dointvec
,
6194 .procname
= "proxy_ndp",
6195 .data
= &ipv6_devconf
.proxy_ndp
,
6196 .maxlen
= sizeof(int),
6198 .proc_handler
= addrconf_sysctl_proxy_ndp
,
6201 .procname
= "accept_source_route",
6202 .data
= &ipv6_devconf
.accept_source_route
,
6203 .maxlen
= sizeof(int),
6205 .proc_handler
= proc_dointvec
,
6207 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
6209 .procname
= "optimistic_dad",
6210 .data
= &ipv6_devconf
.optimistic_dad
,
6211 .maxlen
= sizeof(int),
6213 .proc_handler
= proc_dointvec
,
6216 .procname
= "use_optimistic",
6217 .data
= &ipv6_devconf
.use_optimistic
,
6218 .maxlen
= sizeof(int),
6220 .proc_handler
= proc_dointvec
,
6223 #ifdef CONFIG_IPV6_MROUTE
6225 .procname
= "mc_forwarding",
6226 .data
= &ipv6_devconf
.mc_forwarding
,
6227 .maxlen
= sizeof(int),
6229 .proc_handler
= proc_dointvec
,
6233 .procname
= "disable_ipv6",
6234 .data
= &ipv6_devconf
.disable_ipv6
,
6235 .maxlen
= sizeof(int),
6237 .proc_handler
= addrconf_sysctl_disable
,
6240 .procname
= "accept_dad",
6241 .data
= &ipv6_devconf
.accept_dad
,
6242 .maxlen
= sizeof(int),
6244 .proc_handler
= proc_dointvec
,
6247 .procname
= "force_tllao",
6248 .data
= &ipv6_devconf
.force_tllao
,
6249 .maxlen
= sizeof(int),
6251 .proc_handler
= proc_dointvec
6254 .procname
= "ndisc_notify",
6255 .data
= &ipv6_devconf
.ndisc_notify
,
6256 .maxlen
= sizeof(int),
6258 .proc_handler
= proc_dointvec
6261 .procname
= "suppress_frag_ndisc",
6262 .data
= &ipv6_devconf
.suppress_frag_ndisc
,
6263 .maxlen
= sizeof(int),
6265 .proc_handler
= proc_dointvec
6268 .procname
= "accept_ra_from_local",
6269 .data
= &ipv6_devconf
.accept_ra_from_local
,
6270 .maxlen
= sizeof(int),
6272 .proc_handler
= proc_dointvec
,
6275 .procname
= "accept_ra_mtu",
6276 .data
= &ipv6_devconf
.accept_ra_mtu
,
6277 .maxlen
= sizeof(int),
6279 .proc_handler
= proc_dointvec
,
6282 .procname
= "stable_secret",
6283 .data
= &ipv6_devconf
.stable_secret
,
6284 .maxlen
= IPV6_MAX_STRLEN
,
6286 .proc_handler
= addrconf_sysctl_stable_secret
,
6289 .procname
= "use_oif_addrs_only",
6290 .data
= &ipv6_devconf
.use_oif_addrs_only
,
6291 .maxlen
= sizeof(int),
6293 .proc_handler
= proc_dointvec
,
6296 .procname
= "ignore_routes_with_linkdown",
6297 .data
= &ipv6_devconf
.ignore_routes_with_linkdown
,
6298 .maxlen
= sizeof(int),
6300 .proc_handler
= addrconf_sysctl_ignore_routes_with_linkdown
,
6303 .procname
= "drop_unicast_in_l2_multicast",
6304 .data
= &ipv6_devconf
.drop_unicast_in_l2_multicast
,
6305 .maxlen
= sizeof(int),
6307 .proc_handler
= proc_dointvec
,
6310 .procname
= "drop_unsolicited_na",
6311 .data
= &ipv6_devconf
.drop_unsolicited_na
,
6312 .maxlen
= sizeof(int),
6314 .proc_handler
= proc_dointvec
,
6317 .procname
= "keep_addr_on_down",
6318 .data
= &ipv6_devconf
.keep_addr_on_down
,
6319 .maxlen
= sizeof(int),
6321 .proc_handler
= proc_dointvec
,
6325 .procname
= "seg6_enabled",
6326 .data
= &ipv6_devconf
.seg6_enabled
,
6327 .maxlen
= sizeof(int),
6329 .proc_handler
= proc_dointvec
,
6331 #ifdef CONFIG_IPV6_SEG6_HMAC
6333 .procname
= "seg6_require_hmac",
6334 .data
= &ipv6_devconf
.seg6_require_hmac
,
6335 .maxlen
= sizeof(int),
6337 .proc_handler
= proc_dointvec
,
6341 .procname
= "enhanced_dad",
6342 .data
= &ipv6_devconf
.enhanced_dad
,
6343 .maxlen
= sizeof(int),
6345 .proc_handler
= proc_dointvec
,
6348 .procname
= "addr_gen_mode",
6349 .data
= &ipv6_devconf
.addr_gen_mode
,
6350 .maxlen
= sizeof(int),
6352 .proc_handler
= addrconf_sysctl_addr_gen_mode
,
6355 .procname
= "disable_policy",
6356 .data
= &ipv6_devconf
.disable_policy
,
6357 .maxlen
= sizeof(int),
6359 .proc_handler
= addrconf_sysctl_disable_policy
,
6362 .procname
= "ndisc_tclass",
6363 .data
= &ipv6_devconf
.ndisc_tclass
,
6364 .maxlen
= sizeof(int),
6366 .proc_handler
= proc_dointvec_minmax
,
6367 .extra1
= (void *)&zero
,
6368 .extra2
= (void *)&two_five_five
,
6375 static int __addrconf_sysctl_register(struct net
*net
, char *dev_name
,
6376 struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
6379 struct ctl_table
*table
;
6380 char path
[sizeof("net/ipv6/conf/") + IFNAMSIZ
];
6382 table
= kmemdup(addrconf_sysctl
, sizeof(addrconf_sysctl
), GFP_KERNEL
);
6386 for (i
= 0; table
[i
].data
; i
++) {
6387 table
[i
].data
+= (char *)p
- (char *)&ipv6_devconf
;
6388 /* If one of these is already set, then it is not safe to
6389 * overwrite either of them: this makes proc_dointvec_minmax
6392 if (!table
[i
].extra1
&& !table
[i
].extra2
) {
6393 table
[i
].extra1
= idev
; /* embedded; no ref */
6394 table
[i
].extra2
= net
;
6398 snprintf(path
, sizeof(path
), "net/ipv6/conf/%s", dev_name
);
6400 p
->sysctl_header
= register_net_sysctl(net
, path
, table
);
6401 if (!p
->sysctl_header
)
6404 if (!strcmp(dev_name
, "all"))
6405 ifindex
= NETCONFA_IFINDEX_ALL
;
6406 else if (!strcmp(dev_name
, "default"))
6407 ifindex
= NETCONFA_IFINDEX_DEFAULT
;
6409 ifindex
= idev
->dev
->ifindex
;
6410 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
, NETCONFA_ALL
,
6420 static void __addrconf_sysctl_unregister(struct net
*net
,
6421 struct ipv6_devconf
*p
, int ifindex
)
6423 struct ctl_table
*table
;
6425 if (!p
->sysctl_header
)
6428 table
= p
->sysctl_header
->ctl_table_arg
;
6429 unregister_net_sysctl_table(p
->sysctl_header
);
6430 p
->sysctl_header
= NULL
;
6433 inet6_netconf_notify_devconf(net
, RTM_DELNETCONF
, 0, ifindex
, NULL
);
6436 static int addrconf_sysctl_register(struct inet6_dev
*idev
)
6440 if (!sysctl_dev_name_is_allowed(idev
->dev
->name
))
6443 err
= neigh_sysctl_register(idev
->dev
, idev
->nd_parms
,
6444 &ndisc_ifinfo_sysctl_change
);
6447 err
= __addrconf_sysctl_register(dev_net(idev
->dev
), idev
->dev
->name
,
6450 neigh_sysctl_unregister(idev
->nd_parms
);
6455 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
6457 __addrconf_sysctl_unregister(dev_net(idev
->dev
), &idev
->cnf
,
6458 idev
->dev
->ifindex
);
6459 neigh_sysctl_unregister(idev
->nd_parms
);
6465 static int __net_init
addrconf_init_net(struct net
*net
)
6468 struct ipv6_devconf
*all
, *dflt
;
6470 all
= kmemdup(&ipv6_devconf
, sizeof(ipv6_devconf
), GFP_KERNEL
);
6474 dflt
= kmemdup(&ipv6_devconf_dflt
, sizeof(ipv6_devconf_dflt
), GFP_KERNEL
);
6476 goto err_alloc_dflt
;
6478 /* these will be inherited by all namespaces */
6479 dflt
->autoconf
= ipv6_defaults
.autoconf
;
6480 dflt
->disable_ipv6
= ipv6_defaults
.disable_ipv6
;
6482 dflt
->stable_secret
.initialized
= false;
6483 all
->stable_secret
.initialized
= false;
6485 net
->ipv6
.devconf_all
= all
;
6486 net
->ipv6
.devconf_dflt
= dflt
;
6488 #ifdef CONFIG_SYSCTL
6489 err
= __addrconf_sysctl_register(net
, "all", NULL
, all
);
6493 err
= __addrconf_sysctl_register(net
, "default", NULL
, dflt
);
6499 #ifdef CONFIG_SYSCTL
6501 __addrconf_sysctl_unregister(net
, all
, NETCONFA_IFINDEX_ALL
);
6511 static void __net_exit
addrconf_exit_net(struct net
*net
)
6513 #ifdef CONFIG_SYSCTL
6514 __addrconf_sysctl_unregister(net
, net
->ipv6
.devconf_dflt
,
6515 NETCONFA_IFINDEX_DEFAULT
);
6516 __addrconf_sysctl_unregister(net
, net
->ipv6
.devconf_all
,
6517 NETCONFA_IFINDEX_ALL
);
6519 kfree(net
->ipv6
.devconf_dflt
);
6520 kfree(net
->ipv6
.devconf_all
);
6523 static struct pernet_operations addrconf_ops
= {
6524 .init
= addrconf_init_net
,
6525 .exit
= addrconf_exit_net
,
6528 static struct rtnl_af_ops inet6_ops __read_mostly
= {
6530 .fill_link_af
= inet6_fill_link_af
,
6531 .get_link_af_size
= inet6_get_link_af_size
,
6532 .validate_link_af
= inet6_validate_link_af
,
6533 .set_link_af
= inet6_set_link_af
,
6537 * Init / cleanup code
6540 int __init
addrconf_init(void)
6542 struct inet6_dev
*idev
;
6545 err
= ipv6_addr_label_init();
6547 pr_crit("%s: cannot initialize default policy table: %d\n",
6552 err
= register_pernet_subsys(&addrconf_ops
);
6556 addrconf_wq
= create_workqueue("ipv6_addrconf");
6562 /* The addrconf netdev notifier requires that loopback_dev
6563 * has it's ipv6 private information allocated and setup
6564 * before it can bring up and give link-local addresses
6565 * to other devices which are up.
6567 * Unfortunately, loopback_dev is not necessarily the first
6568 * entry in the global dev_base list of net devices. In fact,
6569 * it is likely to be the very last entry on that list.
6570 * So this causes the notifier registry below to try and
6571 * give link-local addresses to all devices besides loopback_dev
6572 * first, then loopback_dev, which cases all the non-loopback_dev
6573 * devices to fail to get a link-local address.
6575 * So, as a temporary fix, allocate the ipv6 structure for
6576 * loopback_dev first by hand.
6577 * Longer term, all of the dependencies ipv6 has upon the loopback
6578 * device and it being up should be removed.
6581 idev
= ipv6_add_dev(init_net
.loopback_dev
);
6584 err
= PTR_ERR(idev
);
6588 ip6_route_init_special_entries();
6590 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
6591 INIT_HLIST_HEAD(&inet6_addr_lst
[i
]);
6593 register_netdevice_notifier(&ipv6_dev_notf
);
6597 rtnl_af_register(&inet6_ops
);
6599 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
,
6604 /* Only the first call to __rtnl_register can fail */
6605 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
, 0);
6606 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
, 0);
6607 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
,
6608 inet6_dump_ifaddr
, RTNL_FLAG_DOIT_UNLOCKED
);
6609 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
,
6610 inet6_dump_ifmcaddr
, 0);
6611 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
,
6612 inet6_dump_ifacaddr
, 0);
6613 __rtnl_register(PF_INET6
, RTM_GETNETCONF
, inet6_netconf_get_devconf
,
6614 inet6_netconf_dump_devconf
, RTNL_FLAG_DOIT_UNLOCKED
);
6616 ipv6_addr_label_rtnl_register();
6620 rtnl_af_unregister(&inet6_ops
);
6621 unregister_netdevice_notifier(&ipv6_dev_notf
);
6623 destroy_workqueue(addrconf_wq
);
6625 unregister_pernet_subsys(&addrconf_ops
);
6627 ipv6_addr_label_cleanup();
6632 void addrconf_cleanup(void)
6634 struct net_device
*dev
;
6637 unregister_netdevice_notifier(&ipv6_dev_notf
);
6638 unregister_pernet_subsys(&addrconf_ops
);
6639 ipv6_addr_label_cleanup();
6641 rtnl_af_unregister(&inet6_ops
);
6645 /* clean dev list */
6646 for_each_netdev(&init_net
, dev
) {
6647 if (__in6_dev_get(dev
) == NULL
)
6649 addrconf_ifdown(dev
, 1);
6651 addrconf_ifdown(init_net
.loopback_dev
, 2);
6656 spin_lock_bh(&addrconf_hash_lock
);
6657 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
6658 WARN_ON(!hlist_empty(&inet6_addr_lst
[i
]));
6659 spin_unlock_bh(&addrconf_hash_lock
);
6660 cancel_delayed_work(&addr_chk_work
);
6663 destroy_workqueue(addrconf_wq
);