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(struct timer_list
*t
);
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 timer_setup(&ndev
->rs_timer
, addrconf_rs_timer
, 0);
392 memcpy(&ndev
->cnf
, dev_net(dev
)->ipv6
.devconf_dflt
, sizeof(ndev
->cnf
));
394 if (ndev
->cnf
.stable_secret
.initialized
)
395 ndev
->cnf
.addr_gen_mode
= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
397 ndev
->cnf
.addr_gen_mode
= ipv6_devconf_dflt
.addr_gen_mode
;
399 ndev
->cnf
.mtu6
= dev
->mtu
;
400 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
401 if (!ndev
->nd_parms
) {
405 if (ndev
->cnf
.forwarding
)
406 dev_disable_lro(dev
);
407 /* We refer to the device */
410 if (snmp6_alloc_dev(ndev
) < 0) {
412 "%s: cannot allocate memory for statistics; dev=%s.\n",
413 __func__
, dev
->name
);
414 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
420 if (snmp6_register_dev(ndev
) < 0) {
422 "%s: cannot create /proc/net/dev_snmp6/%s\n",
423 __func__
, dev
->name
);
427 /* One reference from device. */
428 refcount_set(&ndev
->refcnt
, 1);
430 if (dev
->flags
& (IFF_NOARP
| IFF_LOOPBACK
))
431 ndev
->cnf
.accept_dad
= -1;
433 #if IS_ENABLED(CONFIG_IPV6_SIT)
434 if (dev
->type
== ARPHRD_SIT
&& (dev
->priv_flags
& IFF_ISATAP
)) {
435 pr_info("%s: Disabled Multicast RS\n", dev
->name
);
436 ndev
->cnf
.rtr_solicits
= 0;
440 INIT_LIST_HEAD(&ndev
->tempaddr_list
);
441 ndev
->desync_factor
= U32_MAX
;
442 if ((dev
->flags
&IFF_LOOPBACK
) ||
443 dev
->type
== ARPHRD_TUNNEL
||
444 dev
->type
== ARPHRD_TUNNEL6
||
445 dev
->type
== ARPHRD_SIT
||
446 dev
->type
== ARPHRD_NONE
) {
447 ndev
->cnf
.use_tempaddr
= -1;
449 ipv6_regen_rndid(ndev
);
451 ndev
->token
= in6addr_any
;
453 if (netif_running(dev
) && addrconf_link_ready(dev
))
454 ndev
->if_flags
|= IF_READY
;
456 ipv6_mc_init_dev(ndev
);
457 ndev
->tstamp
= jiffies
;
458 err
= addrconf_sysctl_register(ndev
);
460 ipv6_mc_destroy_dev(ndev
);
461 snmp6_unregister_dev(ndev
);
464 /* protected by rtnl_lock */
465 rcu_assign_pointer(dev
->ip6_ptr
, ndev
);
467 /* Join interface-local all-node multicast group */
468 ipv6_dev_mc_inc(dev
, &in6addr_interfacelocal_allnodes
);
470 /* Join all-node multicast group */
471 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allnodes
);
473 /* Join all-router multicast group if forwarding is set */
474 if (ndev
->cnf
.forwarding
&& (dev
->flags
& IFF_MULTICAST
))
475 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
480 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
482 in6_dev_finish_destroy(ndev
);
486 static struct inet6_dev
*ipv6_find_idev(struct net_device
*dev
)
488 struct inet6_dev
*idev
;
492 idev
= __in6_dev_get(dev
);
494 idev
= ipv6_add_dev(dev
);
499 if (dev
->flags
&IFF_UP
)
504 static int inet6_netconf_msgsize_devconf(int type
)
506 int size
= NLMSG_ALIGN(sizeof(struct netconfmsg
))
507 + nla_total_size(4); /* NETCONFA_IFINDEX */
510 if (type
== NETCONFA_ALL
)
513 if (all
|| type
== NETCONFA_FORWARDING
)
514 size
+= nla_total_size(4);
515 #ifdef CONFIG_IPV6_MROUTE
516 if (all
|| type
== NETCONFA_MC_FORWARDING
)
517 size
+= nla_total_size(4);
519 if (all
|| type
== NETCONFA_PROXY_NEIGH
)
520 size
+= nla_total_size(4);
522 if (all
|| type
== NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
)
523 size
+= nla_total_size(4);
528 static int inet6_netconf_fill_devconf(struct sk_buff
*skb
, int ifindex
,
529 struct ipv6_devconf
*devconf
, u32 portid
,
530 u32 seq
, int event
, unsigned int flags
,
533 struct nlmsghdr
*nlh
;
534 struct netconfmsg
*ncm
;
537 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct netconfmsg
),
542 if (type
== NETCONFA_ALL
)
545 ncm
= nlmsg_data(nlh
);
546 ncm
->ncm_family
= AF_INET6
;
548 if (nla_put_s32(skb
, NETCONFA_IFINDEX
, ifindex
) < 0)
549 goto nla_put_failure
;
554 if ((all
|| type
== NETCONFA_FORWARDING
) &&
555 nla_put_s32(skb
, NETCONFA_FORWARDING
, devconf
->forwarding
) < 0)
556 goto nla_put_failure
;
557 #ifdef CONFIG_IPV6_MROUTE
558 if ((all
|| type
== NETCONFA_MC_FORWARDING
) &&
559 nla_put_s32(skb
, NETCONFA_MC_FORWARDING
,
560 devconf
->mc_forwarding
) < 0)
561 goto nla_put_failure
;
563 if ((all
|| type
== NETCONFA_PROXY_NEIGH
) &&
564 nla_put_s32(skb
, NETCONFA_PROXY_NEIGH
, devconf
->proxy_ndp
) < 0)
565 goto nla_put_failure
;
567 if ((all
|| type
== NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
) &&
568 nla_put_s32(skb
, NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
,
569 devconf
->ignore_routes_with_linkdown
) < 0)
570 goto nla_put_failure
;
577 nlmsg_cancel(skb
, nlh
);
581 void inet6_netconf_notify_devconf(struct net
*net
, int event
, int type
,
582 int ifindex
, struct ipv6_devconf
*devconf
)
587 skb
= nlmsg_new(inet6_netconf_msgsize_devconf(type
), GFP_KERNEL
);
591 err
= inet6_netconf_fill_devconf(skb
, ifindex
, devconf
, 0, 0,
594 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
595 WARN_ON(err
== -EMSGSIZE
);
599 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_NETCONF
, NULL
, GFP_KERNEL
);
602 rtnl_set_sk_err(net
, RTNLGRP_IPV6_NETCONF
, err
);
605 static const struct nla_policy devconf_ipv6_policy
[NETCONFA_MAX
+1] = {
606 [NETCONFA_IFINDEX
] = { .len
= sizeof(int) },
607 [NETCONFA_FORWARDING
] = { .len
= sizeof(int) },
608 [NETCONFA_PROXY_NEIGH
] = { .len
= sizeof(int) },
609 [NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
] = { .len
= sizeof(int) },
612 static int inet6_netconf_get_devconf(struct sk_buff
*in_skb
,
613 struct nlmsghdr
*nlh
,
614 struct netlink_ext_ack
*extack
)
616 struct net
*net
= sock_net(in_skb
->sk
);
617 struct nlattr
*tb
[NETCONFA_MAX
+1];
618 struct inet6_dev
*in6_dev
= NULL
;
619 struct net_device
*dev
= NULL
;
620 struct netconfmsg
*ncm
;
622 struct ipv6_devconf
*devconf
;
626 err
= nlmsg_parse(nlh
, sizeof(*ncm
), tb
, NETCONFA_MAX
,
627 devconf_ipv6_policy
, extack
);
631 if (!tb
[NETCONFA_IFINDEX
])
635 ifindex
= nla_get_s32(tb
[NETCONFA_IFINDEX
]);
637 case NETCONFA_IFINDEX_ALL
:
638 devconf
= net
->ipv6
.devconf_all
;
640 case NETCONFA_IFINDEX_DEFAULT
:
641 devconf
= net
->ipv6
.devconf_dflt
;
644 dev
= dev_get_by_index(net
, ifindex
);
647 in6_dev
= in6_dev_get(dev
);
650 devconf
= &in6_dev
->cnf
;
655 skb
= nlmsg_new(inet6_netconf_msgsize_devconf(NETCONFA_ALL
), GFP_KERNEL
);
659 err
= inet6_netconf_fill_devconf(skb
, ifindex
, devconf
,
660 NETLINK_CB(in_skb
).portid
,
661 nlh
->nlmsg_seq
, RTM_NEWNETCONF
, 0,
664 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
665 WARN_ON(err
== -EMSGSIZE
);
669 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).portid
);
672 in6_dev_put(in6_dev
);
678 static int inet6_netconf_dump_devconf(struct sk_buff
*skb
,
679 struct netlink_callback
*cb
)
681 struct net
*net
= sock_net(skb
->sk
);
684 struct net_device
*dev
;
685 struct inet6_dev
*idev
;
686 struct hlist_head
*head
;
689 s_idx
= idx
= cb
->args
[1];
691 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
693 head
= &net
->dev_index_head
[h
];
695 cb
->seq
= atomic_read(&net
->ipv6
.dev_addr_genid
) ^
697 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
700 idev
= __in6_dev_get(dev
);
704 if (inet6_netconf_fill_devconf(skb
, dev
->ifindex
,
706 NETLINK_CB(cb
->skb
).portid
,
714 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
720 if (h
== NETDEV_HASHENTRIES
) {
721 if (inet6_netconf_fill_devconf(skb
, NETCONFA_IFINDEX_ALL
,
722 net
->ipv6
.devconf_all
,
723 NETLINK_CB(cb
->skb
).portid
,
725 RTM_NEWNETCONF
, NLM_F_MULTI
,
731 if (h
== NETDEV_HASHENTRIES
+ 1) {
732 if (inet6_netconf_fill_devconf(skb
, NETCONFA_IFINDEX_DEFAULT
,
733 net
->ipv6
.devconf_dflt
,
734 NETLINK_CB(cb
->skb
).portid
,
736 RTM_NEWNETCONF
, NLM_F_MULTI
,
750 static void dev_forward_change(struct inet6_dev
*idev
)
752 struct net_device
*dev
;
753 struct inet6_ifaddr
*ifa
;
758 if (idev
->cnf
.forwarding
)
759 dev_disable_lro(dev
);
760 if (dev
->flags
& IFF_MULTICAST
) {
761 if (idev
->cnf
.forwarding
) {
762 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
763 ipv6_dev_mc_inc(dev
, &in6addr_interfacelocal_allrouters
);
764 ipv6_dev_mc_inc(dev
, &in6addr_sitelocal_allrouters
);
766 ipv6_dev_mc_dec(dev
, &in6addr_linklocal_allrouters
);
767 ipv6_dev_mc_dec(dev
, &in6addr_interfacelocal_allrouters
);
768 ipv6_dev_mc_dec(dev
, &in6addr_sitelocal_allrouters
);
772 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
773 if (ifa
->flags
&IFA_F_TENTATIVE
)
775 if (idev
->cnf
.forwarding
)
776 addrconf_join_anycast(ifa
);
778 addrconf_leave_anycast(ifa
);
780 inet6_netconf_notify_devconf(dev_net(dev
), RTM_NEWNETCONF
,
782 dev
->ifindex
, &idev
->cnf
);
786 static void addrconf_forward_change(struct net
*net
, __s32 newf
)
788 struct net_device
*dev
;
789 struct inet6_dev
*idev
;
791 for_each_netdev(net
, dev
) {
792 idev
= __in6_dev_get(dev
);
794 int changed
= (!idev
->cnf
.forwarding
) ^ (!newf
);
795 idev
->cnf
.forwarding
= newf
;
797 dev_forward_change(idev
);
802 static int addrconf_fixup_forwarding(struct ctl_table
*table
, int *p
, int newf
)
808 return restart_syscall();
810 net
= (struct net
*)table
->extra2
;
814 if (p
== &net
->ipv6
.devconf_dflt
->forwarding
) {
815 if ((!newf
) ^ (!old
))
816 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
818 NETCONFA_IFINDEX_DEFAULT
,
819 net
->ipv6
.devconf_dflt
);
824 if (p
== &net
->ipv6
.devconf_all
->forwarding
) {
825 int old_dflt
= net
->ipv6
.devconf_dflt
->forwarding
;
827 net
->ipv6
.devconf_dflt
->forwarding
= newf
;
828 if ((!newf
) ^ (!old_dflt
))
829 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
831 NETCONFA_IFINDEX_DEFAULT
,
832 net
->ipv6
.devconf_dflt
);
834 addrconf_forward_change(net
, newf
);
835 if ((!newf
) ^ (!old
))
836 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
838 NETCONFA_IFINDEX_ALL
,
839 net
->ipv6
.devconf_all
);
840 } else if ((!newf
) ^ (!old
))
841 dev_forward_change((struct inet6_dev
*)table
->extra1
);
845 rt6_purge_dflt_routers(net
);
849 static void addrconf_linkdown_change(struct net
*net
, __s32 newf
)
851 struct net_device
*dev
;
852 struct inet6_dev
*idev
;
854 for_each_netdev(net
, dev
) {
855 idev
= __in6_dev_get(dev
);
857 int changed
= (!idev
->cnf
.ignore_routes_with_linkdown
) ^ (!newf
);
859 idev
->cnf
.ignore_routes_with_linkdown
= newf
;
861 inet6_netconf_notify_devconf(dev_net(dev
),
863 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
,
870 static int addrconf_fixup_linkdown(struct ctl_table
*table
, int *p
, int newf
)
876 return restart_syscall();
878 net
= (struct net
*)table
->extra2
;
882 if (p
== &net
->ipv6
.devconf_dflt
->ignore_routes_with_linkdown
) {
883 if ((!newf
) ^ (!old
))
884 inet6_netconf_notify_devconf(net
,
886 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
,
887 NETCONFA_IFINDEX_DEFAULT
,
888 net
->ipv6
.devconf_dflt
);
893 if (p
== &net
->ipv6
.devconf_all
->ignore_routes_with_linkdown
) {
894 net
->ipv6
.devconf_dflt
->ignore_routes_with_linkdown
= newf
;
895 addrconf_linkdown_change(net
, newf
);
896 if ((!newf
) ^ (!old
))
897 inet6_netconf_notify_devconf(net
,
899 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
,
900 NETCONFA_IFINDEX_ALL
,
901 net
->ipv6
.devconf_all
);
910 /* Nobody refers to this ifaddr, destroy it */
911 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
913 WARN_ON(!hlist_unhashed(&ifp
->addr_lst
));
915 #ifdef NET_REFCNT_DEBUG
916 pr_debug("%s\n", __func__
);
919 in6_dev_put(ifp
->idev
);
921 if (cancel_delayed_work(&ifp
->dad_work
))
922 pr_notice("delayed DAD work was pending while freeing ifa=%p\n",
925 if (ifp
->state
!= INET6_IFADDR_STATE_DEAD
) {
926 pr_warn("Freeing alive inet6 address %p\n", ifp
);
935 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
938 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
941 * Each device address list is sorted in order of scope -
942 * global before linklocal.
944 list_for_each(p
, &idev
->addr_list
) {
945 struct inet6_ifaddr
*ifa
946 = list_entry(p
, struct inet6_ifaddr
, if_list
);
947 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
951 list_add_tail_rcu(&ifp
->if_list
, p
);
954 static u32
inet6_addr_hash(const struct net
*net
, const struct in6_addr
*addr
)
956 u32 val
= ipv6_addr_hash(addr
) ^ net_hash_mix(net
);
958 return hash_32(val
, IN6_ADDR_HSIZE_SHIFT
);
961 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
962 struct net_device
*dev
, unsigned int hash
)
964 struct inet6_ifaddr
*ifp
;
966 hlist_for_each_entry(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
967 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
969 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
970 if (!dev
|| ifp
->idev
->dev
== dev
)
977 static int ipv6_add_addr_hash(struct net_device
*dev
, struct inet6_ifaddr
*ifa
)
979 unsigned int hash
= inet6_addr_hash(dev_net(dev
), &ifa
->addr
);
982 spin_lock(&addrconf_hash_lock
);
984 /* Ignore adding duplicate addresses on an interface */
985 if (ipv6_chk_same_addr(dev_net(dev
), &ifa
->addr
, dev
, hash
)) {
986 ADBG("ipv6_add_addr: already assigned\n");
989 hlist_add_head_rcu(&ifa
->addr_lst
, &inet6_addr_lst
[hash
]);
992 spin_unlock(&addrconf_hash_lock
);
997 /* On success it returns ifp with increased reference count */
999 static struct inet6_ifaddr
*
1000 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
1001 const struct in6_addr
*peer_addr
, int pfxlen
,
1002 int scope
, u32 flags
, u32 valid_lft
, u32 prefered_lft
,
1003 bool can_block
, struct netlink_ext_ack
*extack
)
1005 gfp_t gfp_flags
= can_block
? GFP_KERNEL
: GFP_ATOMIC
;
1006 struct net
*net
= dev_net(idev
->dev
);
1007 struct inet6_ifaddr
*ifa
= NULL
;
1008 struct rt6_info
*rt
= NULL
;
1010 int addr_type
= ipv6_addr_type(addr
);
1012 if (addr_type
== IPV6_ADDR_ANY
||
1013 addr_type
& IPV6_ADDR_MULTICAST
||
1014 (!(idev
->dev
->flags
& IFF_LOOPBACK
) &&
1015 addr_type
& IPV6_ADDR_LOOPBACK
))
1016 return ERR_PTR(-EADDRNOTAVAIL
);
1019 err
= -ENODEV
; /*XXX*/
1023 if (idev
->cnf
.disable_ipv6
) {
1028 /* validator notifier needs to be blocking;
1029 * do not call in atomic context
1032 struct in6_validator_info i6vi
= {
1038 err
= inet6addr_validator_notifier_call_chain(NETDEV_UP
, &i6vi
);
1039 err
= notifier_to_errno(err
);
1044 ifa
= kzalloc(sizeof(*ifa
), gfp_flags
);
1046 ADBG("ipv6_add_addr: malloc failed\n");
1051 rt
= addrconf_dst_alloc(idev
, addr
, false);
1058 if (net
->ipv6
.devconf_all
->disable_policy
||
1059 idev
->cnf
.disable_policy
)
1060 rt
->dst
.flags
|= DST_NOPOLICY
;
1062 neigh_parms_data_state_setall(idev
->nd_parms
);
1066 ifa
->peer_addr
= *peer_addr
;
1068 spin_lock_init(&ifa
->lock
);
1069 INIT_DELAYED_WORK(&ifa
->dad_work
, addrconf_dad_work
);
1070 INIT_HLIST_NODE(&ifa
->addr_lst
);
1072 ifa
->prefix_len
= pfxlen
;
1074 /* No need to add the TENTATIVE flag for addresses with NODAD */
1075 if (!(flags
& IFA_F_NODAD
))
1076 ifa
->flags
|= IFA_F_TENTATIVE
;
1077 ifa
->valid_lft
= valid_lft
;
1078 ifa
->prefered_lft
= prefered_lft
;
1079 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
1080 ifa
->tokenized
= false;
1088 refcount_set(&ifa
->refcnt
, 1);
1092 err
= ipv6_add_addr_hash(idev
->dev
, ifa
);
1094 rcu_read_unlock_bh();
1098 write_lock(&idev
->lock
);
1100 /* Add to inet6_dev unicast addr list. */
1101 ipv6_link_dev_addr(idev
, ifa
);
1103 if (ifa
->flags
&IFA_F_TEMPORARY
) {
1104 list_add(&ifa
->tmp_list
, &idev
->tempaddr_list
);
1109 write_unlock(&idev
->lock
);
1111 rcu_read_unlock_bh();
1113 inet6addr_notifier_call_chain(NETDEV_UP
, ifa
);
1115 if (unlikely(err
< 0)) {
1120 in6_dev_put(ifa
->idev
);
1129 enum cleanup_prefix_rt_t
{
1130 CLEANUP_PREFIX_RT_NOP
, /* no cleanup action for prefix route */
1131 CLEANUP_PREFIX_RT_DEL
, /* delete the prefix route */
1132 CLEANUP_PREFIX_RT_EXPIRE
, /* update the lifetime of the prefix route */
1136 * Check, whether the prefix for ifp would still need a prefix route
1137 * after deleting ifp. The function returns one of the CLEANUP_PREFIX_RT_*
1140 * 1) we don't purge prefix if address was not permanent.
1141 * prefix is managed by its own lifetime.
1142 * 2) we also don't purge, if the address was IFA_F_NOPREFIXROUTE.
1143 * 3) if there are no addresses, delete prefix.
1144 * 4) if there are still other permanent address(es),
1145 * corresponding prefix is still permanent.
1146 * 5) if there are still other addresses with IFA_F_NOPREFIXROUTE,
1147 * don't purge the prefix, assume user space is managing it.
1148 * 6) otherwise, update prefix lifetime to the
1149 * longest valid lifetime among the corresponding
1150 * addresses on the device.
1151 * Note: subsequent RA will update lifetime.
1153 static enum cleanup_prefix_rt_t
1154 check_cleanup_prefix_route(struct inet6_ifaddr
*ifp
, unsigned long *expires
)
1156 struct inet6_ifaddr
*ifa
;
1157 struct inet6_dev
*idev
= ifp
->idev
;
1158 unsigned long lifetime
;
1159 enum cleanup_prefix_rt_t action
= CLEANUP_PREFIX_RT_DEL
;
1163 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
1166 if (!ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
1169 if (ifa
->flags
& (IFA_F_PERMANENT
| IFA_F_NOPREFIXROUTE
))
1170 return CLEANUP_PREFIX_RT_NOP
;
1172 action
= CLEANUP_PREFIX_RT_EXPIRE
;
1174 spin_lock(&ifa
->lock
);
1176 lifetime
= addrconf_timeout_fixup(ifa
->valid_lft
, HZ
);
1178 * Note: Because this address is
1179 * not permanent, lifetime <
1180 * LONG_MAX / HZ here.
1182 if (time_before(*expires
, ifa
->tstamp
+ lifetime
* HZ
))
1183 *expires
= ifa
->tstamp
+ lifetime
* HZ
;
1184 spin_unlock(&ifa
->lock
);
1191 cleanup_prefix_route(struct inet6_ifaddr
*ifp
, unsigned long expires
, bool del_rt
)
1193 struct rt6_info
*rt
;
1195 rt
= addrconf_get_prefix_route(&ifp
->addr
,
1198 0, RTF_GATEWAY
| RTF_DEFAULT
);
1203 if (!(rt
->rt6i_flags
& RTF_EXPIRES
))
1204 rt6_set_expires(rt
, expires
);
1211 /* This function wants to get referenced ifp and releases it before return */
1213 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
1216 enum cleanup_prefix_rt_t action
= CLEANUP_PREFIX_RT_NOP
;
1217 unsigned long expires
;
1221 spin_lock_bh(&ifp
->lock
);
1223 ifp
->state
= INET6_IFADDR_STATE_DEAD
;
1224 spin_unlock_bh(&ifp
->lock
);
1226 if (state
== INET6_IFADDR_STATE_DEAD
)
1229 spin_lock_bh(&addrconf_hash_lock
);
1230 hlist_del_init_rcu(&ifp
->addr_lst
);
1231 spin_unlock_bh(&addrconf_hash_lock
);
1233 write_lock_bh(&ifp
->idev
->lock
);
1235 if (ifp
->flags
&IFA_F_TEMPORARY
) {
1236 list_del(&ifp
->tmp_list
);
1238 in6_ifa_put(ifp
->ifpub
);
1244 if (ifp
->flags
& IFA_F_PERMANENT
&& !(ifp
->flags
& IFA_F_NOPREFIXROUTE
))
1245 action
= check_cleanup_prefix_route(ifp
, &expires
);
1247 list_del_rcu(&ifp
->if_list
);
1250 write_unlock_bh(&ifp
->idev
->lock
);
1252 addrconf_del_dad_work(ifp
);
1254 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
1256 inet6addr_notifier_call_chain(NETDEV_DOWN
, ifp
);
1258 if (action
!= CLEANUP_PREFIX_RT_NOP
) {
1259 cleanup_prefix_route(ifp
, expires
,
1260 action
== CLEANUP_PREFIX_RT_DEL
);
1263 /* clean up prefsrc entries */
1264 rt6_remove_prefsrc(ifp
);
1269 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
,
1270 struct inet6_ifaddr
*ift
,
1273 struct inet6_dev
*idev
= ifp
->idev
;
1274 struct in6_addr addr
, *tmpaddr
;
1275 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_tstamp
, age
;
1276 unsigned long regen_advance
;
1280 unsigned long now
= jiffies
;
1281 long max_desync_factor
;
1282 s32 cnf_temp_preferred_lft
;
1284 write_lock_bh(&idev
->lock
);
1286 spin_lock_bh(&ift
->lock
);
1287 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
1288 spin_unlock_bh(&ift
->lock
);
1295 if (idev
->cnf
.use_tempaddr
<= 0) {
1296 write_unlock_bh(&idev
->lock
);
1297 pr_info("%s: use_tempaddr is disabled\n", __func__
);
1302 spin_lock_bh(&ifp
->lock
);
1303 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
1304 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
1305 spin_unlock_bh(&ifp
->lock
);
1306 write_unlock_bh(&idev
->lock
);
1307 pr_warn("%s: regeneration time exceeded - disabled temporary address support\n",
1314 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
1315 ipv6_try_regen_rndid(idev
, tmpaddr
);
1316 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
1317 age
= (now
- ifp
->tstamp
) / HZ
;
1319 regen_advance
= idev
->cnf
.regen_max_retry
*
1320 idev
->cnf
.dad_transmits
*
1321 NEIGH_VAR(idev
->nd_parms
, RETRANS_TIME
) / HZ
;
1323 /* recalculate max_desync_factor each time and update
1324 * idev->desync_factor if it's larger
1326 cnf_temp_preferred_lft
= READ_ONCE(idev
->cnf
.temp_prefered_lft
);
1327 max_desync_factor
= min_t(__u32
,
1328 idev
->cnf
.max_desync_factor
,
1329 cnf_temp_preferred_lft
- regen_advance
);
1331 if (unlikely(idev
->desync_factor
> max_desync_factor
)) {
1332 if (max_desync_factor
> 0) {
1333 get_random_bytes(&idev
->desync_factor
,
1334 sizeof(idev
->desync_factor
));
1335 idev
->desync_factor
%= max_desync_factor
;
1337 idev
->desync_factor
= 0;
1341 tmp_valid_lft
= min_t(__u32
,
1343 idev
->cnf
.temp_valid_lft
+ age
);
1344 tmp_prefered_lft
= cnf_temp_preferred_lft
+ age
-
1345 idev
->desync_factor
;
1346 tmp_prefered_lft
= min_t(__u32
, ifp
->prefered_lft
, tmp_prefered_lft
);
1347 tmp_plen
= ifp
->prefix_len
;
1348 tmp_tstamp
= ifp
->tstamp
;
1349 spin_unlock_bh(&ifp
->lock
);
1351 write_unlock_bh(&idev
->lock
);
1353 /* A temporary address is created only if this calculated Preferred
1354 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
1355 * an implementation must not create a temporary address with a zero
1356 * Preferred Lifetime.
1357 * Use age calculation as in addrconf_verify to avoid unnecessary
1358 * temporary addresses being generated.
1360 age
= (now
- tmp_tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
1361 if (tmp_prefered_lft
<= regen_advance
+ age
) {
1368 addr_flags
= IFA_F_TEMPORARY
;
1369 /* set in addrconf_prefix_rcv() */
1370 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
1371 addr_flags
|= IFA_F_OPTIMISTIC
;
1373 ift
= ipv6_add_addr(idev
, &addr
, NULL
, tmp_plen
,
1374 ipv6_addr_scope(&addr
), addr_flags
,
1375 tmp_valid_lft
, tmp_prefered_lft
, block
, NULL
);
1379 pr_info("%s: retry temporary address regeneration\n", __func__
);
1381 write_lock_bh(&idev
->lock
);
1385 spin_lock_bh(&ift
->lock
);
1388 ift
->tstamp
= tmp_tstamp
;
1389 spin_unlock_bh(&ift
->lock
);
1391 addrconf_dad_start(ift
);
1399 * Choose an appropriate source address (RFC3484)
1402 IPV6_SADDR_RULE_INIT
= 0,
1403 IPV6_SADDR_RULE_LOCAL
,
1404 IPV6_SADDR_RULE_SCOPE
,
1405 IPV6_SADDR_RULE_PREFERRED
,
1406 #ifdef CONFIG_IPV6_MIP6
1407 IPV6_SADDR_RULE_HOA
,
1409 IPV6_SADDR_RULE_OIF
,
1410 IPV6_SADDR_RULE_LABEL
,
1411 IPV6_SADDR_RULE_PRIVACY
,
1412 IPV6_SADDR_RULE_ORCHID
,
1413 IPV6_SADDR_RULE_PREFIX
,
1414 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1415 IPV6_SADDR_RULE_NOT_OPTIMISTIC
,
1420 struct ipv6_saddr_score
{
1423 struct inet6_ifaddr
*ifa
;
1424 DECLARE_BITMAP(scorebits
, IPV6_SADDR_RULE_MAX
);
1429 struct ipv6_saddr_dst
{
1430 const struct in6_addr
*addr
;
1437 static inline int ipv6_saddr_preferred(int type
)
1439 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|IPV6_ADDR_LOOPBACK
))
1444 static bool ipv6_use_optimistic_addr(struct net
*net
,
1445 struct inet6_dev
*idev
)
1447 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1450 if (!net
->ipv6
.devconf_all
->optimistic_dad
&& !idev
->cnf
.optimistic_dad
)
1452 if (!net
->ipv6
.devconf_all
->use_optimistic
&& !idev
->cnf
.use_optimistic
)
1461 static int ipv6_get_saddr_eval(struct net
*net
,
1462 struct ipv6_saddr_score
*score
,
1463 struct ipv6_saddr_dst
*dst
,
1468 if (i
<= score
->rule
) {
1470 case IPV6_SADDR_RULE_SCOPE
:
1471 ret
= score
->scopedist
;
1473 case IPV6_SADDR_RULE_PREFIX
:
1474 ret
= score
->matchlen
;
1477 ret
= !!test_bit(i
, score
->scorebits
);
1483 case IPV6_SADDR_RULE_INIT
:
1484 /* Rule 0: remember if hiscore is not ready yet */
1487 case IPV6_SADDR_RULE_LOCAL
:
1488 /* Rule 1: Prefer same address */
1489 ret
= ipv6_addr_equal(&score
->ifa
->addr
, dst
->addr
);
1491 case IPV6_SADDR_RULE_SCOPE
:
1492 /* Rule 2: Prefer appropriate scope
1497 * ---+--+-+---> scope
1499 * | d is scope of the destination.
1501 * | \ <- smaller scope is better if
1502 * B-15 | \ if scope is enough for destination.
1503 * | ret = B - scope (-1 <= scope >= d <= 15).
1505 * |/ <- greater is better
1506 * -C / if scope is not enough for destination.
1507 * /| ret = scope - C (-1 <= d < scope <= 15).
1509 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1510 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1511 * Assume B = 0 and we get C > 29.
1513 ret
= __ipv6_addr_src_scope(score
->addr_type
);
1514 if (ret
>= dst
->scope
)
1517 ret
-= 128; /* 30 is enough */
1518 score
->scopedist
= ret
;
1520 case IPV6_SADDR_RULE_PREFERRED
:
1522 /* Rule 3: Avoid deprecated and optimistic addresses */
1523 u8 avoid
= IFA_F_DEPRECATED
;
1525 if (!ipv6_use_optimistic_addr(net
, score
->ifa
->idev
))
1526 avoid
|= IFA_F_OPTIMISTIC
;
1527 ret
= ipv6_saddr_preferred(score
->addr_type
) ||
1528 !(score
->ifa
->flags
& avoid
);
1531 #ifdef CONFIG_IPV6_MIP6
1532 case IPV6_SADDR_RULE_HOA
:
1534 /* Rule 4: Prefer home address */
1535 int prefhome
= !(dst
->prefs
& IPV6_PREFER_SRC_COA
);
1536 ret
= !(score
->ifa
->flags
& IFA_F_HOMEADDRESS
) ^ prefhome
;
1540 case IPV6_SADDR_RULE_OIF
:
1541 /* Rule 5: Prefer outgoing interface */
1542 ret
= (!dst
->ifindex
||
1543 dst
->ifindex
== score
->ifa
->idev
->dev
->ifindex
);
1545 case IPV6_SADDR_RULE_LABEL
:
1546 /* Rule 6: Prefer matching label */
1547 ret
= ipv6_addr_label(net
,
1548 &score
->ifa
->addr
, score
->addr_type
,
1549 score
->ifa
->idev
->dev
->ifindex
) == dst
->label
;
1551 case IPV6_SADDR_RULE_PRIVACY
:
1553 /* Rule 7: Prefer public address
1554 * Note: prefer temporary address if use_tempaddr >= 2
1556 int preftmp
= dst
->prefs
& (IPV6_PREFER_SRC_PUBLIC
|IPV6_PREFER_SRC_TMP
) ?
1557 !!(dst
->prefs
& IPV6_PREFER_SRC_TMP
) :
1558 score
->ifa
->idev
->cnf
.use_tempaddr
>= 2;
1559 ret
= (!(score
->ifa
->flags
& IFA_F_TEMPORARY
)) ^ preftmp
;
1562 case IPV6_SADDR_RULE_ORCHID
:
1563 /* Rule 8-: Prefer ORCHID vs ORCHID or
1564 * non-ORCHID vs non-ORCHID
1566 ret
= !(ipv6_addr_orchid(&score
->ifa
->addr
) ^
1567 ipv6_addr_orchid(dst
->addr
));
1569 case IPV6_SADDR_RULE_PREFIX
:
1570 /* Rule 8: Use longest matching prefix */
1571 ret
= ipv6_addr_diff(&score
->ifa
->addr
, dst
->addr
);
1572 if (ret
> score
->ifa
->prefix_len
)
1573 ret
= score
->ifa
->prefix_len
;
1574 score
->matchlen
= ret
;
1576 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1577 case IPV6_SADDR_RULE_NOT_OPTIMISTIC
:
1578 /* Optimistic addresses still have lower precedence than other
1579 * preferred addresses.
1581 ret
= !(score
->ifa
->flags
& IFA_F_OPTIMISTIC
);
1589 __set_bit(i
, score
->scorebits
);
1595 static int __ipv6_dev_get_saddr(struct net
*net
,
1596 struct ipv6_saddr_dst
*dst
,
1597 struct inet6_dev
*idev
,
1598 struct ipv6_saddr_score
*scores
,
1601 struct ipv6_saddr_score
*score
= &scores
[1 - hiscore_idx
], *hiscore
= &scores
[hiscore_idx
];
1603 list_for_each_entry_rcu(score
->ifa
, &idev
->addr_list
, if_list
) {
1607 * - Tentative Address (RFC2462 section 5.4)
1608 * - A tentative address is not considered
1609 * "assigned to an interface" in the traditional
1610 * sense, unless it is also flagged as optimistic.
1611 * - Candidate Source Address (section 4)
1612 * - In any case, anycast addresses, multicast
1613 * addresses, and the unspecified address MUST
1614 * NOT be included in a candidate set.
1616 if ((score
->ifa
->flags
& IFA_F_TENTATIVE
) &&
1617 (!(score
->ifa
->flags
& IFA_F_OPTIMISTIC
)))
1620 score
->addr_type
= __ipv6_addr_type(&score
->ifa
->addr
);
1622 if (unlikely(score
->addr_type
== IPV6_ADDR_ANY
||
1623 score
->addr_type
& IPV6_ADDR_MULTICAST
)) {
1624 net_dbg_ratelimited("ADDRCONF: unspecified / multicast address assigned as unicast address on %s",
1630 bitmap_zero(score
->scorebits
, IPV6_SADDR_RULE_MAX
);
1632 for (i
= 0; i
< IPV6_SADDR_RULE_MAX
; i
++) {
1633 int minihiscore
, miniscore
;
1635 minihiscore
= ipv6_get_saddr_eval(net
, hiscore
, dst
, i
);
1636 miniscore
= ipv6_get_saddr_eval(net
, score
, dst
, i
);
1638 if (minihiscore
> miniscore
) {
1639 if (i
== IPV6_SADDR_RULE_SCOPE
&&
1640 score
->scopedist
> 0) {
1643 * each remaining entry
1644 * has too small (not enough)
1645 * scope, because ifa entries
1646 * are sorted by their scope
1652 } else if (minihiscore
< miniscore
) {
1653 swap(hiscore
, score
);
1654 hiscore_idx
= 1 - hiscore_idx
;
1656 /* restore our iterator */
1657 score
->ifa
= hiscore
->ifa
;
1667 static int ipv6_get_saddr_master(struct net
*net
,
1668 const struct net_device
*dst_dev
,
1669 const struct net_device
*master
,
1670 struct ipv6_saddr_dst
*dst
,
1671 struct ipv6_saddr_score
*scores
,
1674 struct inet6_dev
*idev
;
1676 idev
= __in6_dev_get(dst_dev
);
1678 hiscore_idx
= __ipv6_dev_get_saddr(net
, dst
, idev
,
1679 scores
, hiscore_idx
);
1681 idev
= __in6_dev_get(master
);
1683 hiscore_idx
= __ipv6_dev_get_saddr(net
, dst
, idev
,
1684 scores
, hiscore_idx
);
1689 int ipv6_dev_get_saddr(struct net
*net
, const struct net_device
*dst_dev
,
1690 const struct in6_addr
*daddr
, unsigned int prefs
,
1691 struct in6_addr
*saddr
)
1693 struct ipv6_saddr_score scores
[2], *hiscore
;
1694 struct ipv6_saddr_dst dst
;
1695 struct inet6_dev
*idev
;
1696 struct net_device
*dev
;
1698 bool use_oif_addr
= false;
1699 int hiscore_idx
= 0;
1702 dst_type
= __ipv6_addr_type(daddr
);
1704 dst
.ifindex
= dst_dev
? dst_dev
->ifindex
: 0;
1705 dst
.scope
= __ipv6_addr_src_scope(dst_type
);
1706 dst
.label
= ipv6_addr_label(net
, daddr
, dst_type
, dst
.ifindex
);
1709 scores
[hiscore_idx
].rule
= -1;
1710 scores
[hiscore_idx
].ifa
= NULL
;
1714 /* Candidate Source Address (section 4)
1715 * - multicast and link-local destination address,
1716 * the set of candidate source address MUST only
1717 * include addresses assigned to interfaces
1718 * belonging to the same link as the outgoing
1720 * (- For site-local destination addresses, the
1721 * set of candidate source addresses MUST only
1722 * include addresses assigned to interfaces
1723 * belonging to the same site as the outgoing
1725 * - "It is RECOMMENDED that the candidate source addresses
1726 * be the set of unicast addresses assigned to the
1727 * interface that will be used to send to the destination
1728 * (the 'outgoing' interface)." (RFC 6724)
1731 idev
= __in6_dev_get(dst_dev
);
1732 if ((dst_type
& IPV6_ADDR_MULTICAST
) ||
1733 dst
.scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
||
1734 (idev
&& idev
->cnf
.use_oif_addrs_only
)) {
1735 use_oif_addr
= true;
1741 hiscore_idx
= __ipv6_dev_get_saddr(net
, &dst
, idev
, scores
, hiscore_idx
);
1743 const struct net_device
*master
;
1746 /* if dst_dev exists and is enslaved to an L3 device, then
1747 * prefer addresses from dst_dev and then the master over
1748 * any other enslaved devices in the L3 domain.
1750 master
= l3mdev_master_dev_rcu(dst_dev
);
1752 master_idx
= master
->ifindex
;
1754 hiscore_idx
= ipv6_get_saddr_master(net
, dst_dev
,
1756 scores
, hiscore_idx
);
1758 if (scores
[hiscore_idx
].ifa
)
1762 for_each_netdev_rcu(net
, dev
) {
1763 /* only consider addresses on devices in the
1766 if (l3mdev_master_ifindex_rcu(dev
) != master_idx
)
1768 idev
= __in6_dev_get(dev
);
1771 hiscore_idx
= __ipv6_dev_get_saddr(net
, &dst
, idev
, scores
, hiscore_idx
);
1776 hiscore
= &scores
[hiscore_idx
];
1778 ret
= -EADDRNOTAVAIL
;
1780 *saddr
= hiscore
->ifa
->addr
;
1785 EXPORT_SYMBOL(ipv6_dev_get_saddr
);
1787 int __ipv6_get_lladdr(struct inet6_dev
*idev
, struct in6_addr
*addr
,
1790 struct inet6_ifaddr
*ifp
;
1791 int err
= -EADDRNOTAVAIL
;
1793 list_for_each_entry_reverse(ifp
, &idev
->addr_list
, if_list
) {
1794 if (ifp
->scope
> IFA_LINK
)
1796 if (ifp
->scope
== IFA_LINK
&&
1797 !(ifp
->flags
& banned_flags
)) {
1806 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1809 struct inet6_dev
*idev
;
1810 int err
= -EADDRNOTAVAIL
;
1813 idev
= __in6_dev_get(dev
);
1815 read_lock_bh(&idev
->lock
);
1816 err
= __ipv6_get_lladdr(idev
, addr
, banned_flags
);
1817 read_unlock_bh(&idev
->lock
);
1823 static int ipv6_count_addresses(const struct inet6_dev
*idev
)
1825 const struct inet6_ifaddr
*ifp
;
1829 list_for_each_entry_rcu(ifp
, &idev
->addr_list
, if_list
)
1835 int ipv6_chk_addr(struct net
*net
, const struct in6_addr
*addr
,
1836 const struct net_device
*dev
, int strict
)
1838 return ipv6_chk_addr_and_flags(net
, addr
, dev
, strict
, IFA_F_TENTATIVE
);
1840 EXPORT_SYMBOL(ipv6_chk_addr
);
1842 int ipv6_chk_addr_and_flags(struct net
*net
, const struct in6_addr
*addr
,
1843 const struct net_device
*dev
, int strict
,
1846 unsigned int hash
= inet6_addr_hash(net
, addr
);
1847 struct inet6_ifaddr
*ifp
;
1851 hlist_for_each_entry_rcu(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1852 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1854 /* Decouple optimistic from tentative for evaluation here.
1855 * Ban optimistic addresses explicitly, when required.
1857 ifp_flags
= (ifp
->flags
&IFA_F_OPTIMISTIC
)
1858 ? (ifp
->flags
&~IFA_F_TENTATIVE
)
1860 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1861 !(ifp_flags
&banned_flags
) &&
1862 (!dev
|| ifp
->idev
->dev
== dev
||
1863 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))) {
1872 EXPORT_SYMBOL(ipv6_chk_addr_and_flags
);
1875 /* Compares an address/prefix_len with addresses on device @dev.
1876 * If one is found it returns true.
1878 bool ipv6_chk_custom_prefix(const struct in6_addr
*addr
,
1879 const unsigned int prefix_len
, struct net_device
*dev
)
1881 const struct inet6_ifaddr
*ifa
;
1882 const struct inet6_dev
*idev
;
1886 idev
= __in6_dev_get(dev
);
1888 list_for_each_entry_rcu(ifa
, &idev
->addr_list
, if_list
) {
1889 ret
= ipv6_prefix_equal(addr
, &ifa
->addr
, prefix_len
);
1898 EXPORT_SYMBOL(ipv6_chk_custom_prefix
);
1900 int ipv6_chk_prefix(const struct in6_addr
*addr
, struct net_device
*dev
)
1902 const struct inet6_ifaddr
*ifa
;
1903 const struct inet6_dev
*idev
;
1908 idev
= __in6_dev_get(dev
);
1910 list_for_each_entry_rcu(ifa
, &idev
->addr_list
, if_list
) {
1911 onlink
= ipv6_prefix_equal(addr
, &ifa
->addr
,
1920 EXPORT_SYMBOL(ipv6_chk_prefix
);
1922 struct inet6_ifaddr
*ipv6_get_ifaddr(struct net
*net
, const struct in6_addr
*addr
,
1923 struct net_device
*dev
, int strict
)
1925 unsigned int hash
= inet6_addr_hash(net
, addr
);
1926 struct inet6_ifaddr
*ifp
, *result
= NULL
;
1929 hlist_for_each_entry_rcu(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1930 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1932 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1933 if (!dev
|| ifp
->idev
->dev
== dev
||
1934 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1946 /* Gets referenced address, destroys ifaddr */
1948 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
, int dad_failed
)
1951 ifp
->flags
|= IFA_F_DADFAILED
;
1953 if (ifp
->flags
&IFA_F_TEMPORARY
) {
1954 struct inet6_ifaddr
*ifpub
;
1955 spin_lock_bh(&ifp
->lock
);
1958 in6_ifa_hold(ifpub
);
1959 spin_unlock_bh(&ifp
->lock
);
1960 ipv6_create_tempaddr(ifpub
, ifp
, true);
1963 spin_unlock_bh(&ifp
->lock
);
1966 } else if (ifp
->flags
&IFA_F_PERMANENT
|| !dad_failed
) {
1967 spin_lock_bh(&ifp
->lock
);
1968 addrconf_del_dad_work(ifp
);
1969 ifp
->flags
|= IFA_F_TENTATIVE
;
1970 spin_unlock_bh(&ifp
->lock
);
1972 ipv6_ifa_notify(0, ifp
);
1979 static int addrconf_dad_end(struct inet6_ifaddr
*ifp
)
1983 spin_lock_bh(&ifp
->lock
);
1984 if (ifp
->state
== INET6_IFADDR_STATE_DAD
) {
1985 ifp
->state
= INET6_IFADDR_STATE_POSTDAD
;
1988 spin_unlock_bh(&ifp
->lock
);
1993 void addrconf_dad_failure(struct sk_buff
*skb
, struct inet6_ifaddr
*ifp
)
1995 struct inet6_dev
*idev
= ifp
->idev
;
1996 struct net
*net
= dev_net(ifp
->idev
->dev
);
1998 if (addrconf_dad_end(ifp
)) {
2003 net_info_ratelimited("%s: IPv6 duplicate address %pI6c used by %pM detected!\n",
2004 ifp
->idev
->dev
->name
, &ifp
->addr
, eth_hdr(skb
)->h_source
);
2006 spin_lock_bh(&ifp
->lock
);
2008 if (ifp
->flags
& IFA_F_STABLE_PRIVACY
) {
2009 int scope
= ifp
->scope
;
2010 u32 flags
= ifp
->flags
;
2011 struct in6_addr new_addr
;
2012 struct inet6_ifaddr
*ifp2
;
2013 u32 valid_lft
, preferred_lft
;
2014 int pfxlen
= ifp
->prefix_len
;
2015 int retries
= ifp
->stable_privacy_retry
+ 1;
2017 if (retries
> net
->ipv6
.sysctl
.idgen_retries
) {
2018 net_info_ratelimited("%s: privacy stable address generation failed because of DAD conflicts!\n",
2019 ifp
->idev
->dev
->name
);
2023 new_addr
= ifp
->addr
;
2024 if (ipv6_generate_stable_address(&new_addr
, retries
,
2028 valid_lft
= ifp
->valid_lft
;
2029 preferred_lft
= ifp
->prefered_lft
;
2031 spin_unlock_bh(&ifp
->lock
);
2033 if (idev
->cnf
.max_addresses
&&
2034 ipv6_count_addresses(idev
) >=
2035 idev
->cnf
.max_addresses
)
2038 net_info_ratelimited("%s: generating new stable privacy address because of DAD conflict\n",
2039 ifp
->idev
->dev
->name
);
2041 ifp2
= ipv6_add_addr(idev
, &new_addr
, NULL
, pfxlen
,
2042 scope
, flags
, valid_lft
,
2043 preferred_lft
, false, NULL
);
2047 spin_lock_bh(&ifp2
->lock
);
2048 ifp2
->stable_privacy_retry
= retries
;
2049 ifp2
->state
= INET6_IFADDR_STATE_PREDAD
;
2050 spin_unlock_bh(&ifp2
->lock
);
2052 addrconf_mod_dad_work(ifp2
, net
->ipv6
.sysctl
.idgen_delay
);
2055 spin_lock_bh(&ifp
->lock
);
2059 /* transition from _POSTDAD to _ERRDAD */
2060 ifp
->state
= INET6_IFADDR_STATE_ERRDAD
;
2061 spin_unlock_bh(&ifp
->lock
);
2063 addrconf_mod_dad_work(ifp
, 0);
2067 /* Join to solicited addr multicast group.
2068 * caller must hold RTNL */
2069 void addrconf_join_solict(struct net_device
*dev
, const struct in6_addr
*addr
)
2071 struct in6_addr maddr
;
2073 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
2076 addrconf_addr_solict_mult(addr
, &maddr
);
2077 ipv6_dev_mc_inc(dev
, &maddr
);
2080 /* caller must hold RTNL */
2081 void addrconf_leave_solict(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
2083 struct in6_addr maddr
;
2085 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
2088 addrconf_addr_solict_mult(addr
, &maddr
);
2089 __ipv6_dev_mc_dec(idev
, &maddr
);
2092 /* caller must hold RTNL */
2093 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
2095 struct in6_addr addr
;
2097 if (ifp
->prefix_len
>= 127) /* RFC 6164 */
2099 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
2100 if (ipv6_addr_any(&addr
))
2102 __ipv6_dev_ac_inc(ifp
->idev
, &addr
);
2105 /* caller must hold RTNL */
2106 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
2108 struct in6_addr addr
;
2110 if (ifp
->prefix_len
>= 127) /* RFC 6164 */
2112 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
2113 if (ipv6_addr_any(&addr
))
2115 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
2118 static int addrconf_ifid_6lowpan(u8
*eui
, struct net_device
*dev
)
2120 switch (dev
->addr_len
) {
2122 memcpy(eui
, dev
->dev_addr
, 3);
2125 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
2127 case EUI64_ADDR_LEN
:
2128 memcpy(eui
, dev
->dev_addr
, EUI64_ADDR_LEN
);
2138 static int addrconf_ifid_ieee1394(u8
*eui
, struct net_device
*dev
)
2140 union fwnet_hwaddr
*ha
;
2142 if (dev
->addr_len
!= FWNET_ALEN
)
2145 ha
= (union fwnet_hwaddr
*)dev
->dev_addr
;
2147 memcpy(eui
, &ha
->uc
.uniq_id
, sizeof(ha
->uc
.uniq_id
));
2152 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
2154 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
2155 if (dev
->addr_len
!= ARCNET_ALEN
)
2158 eui
[7] = *(u8
*)dev
->dev_addr
;
2162 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
2164 if (dev
->addr_len
!= INFINIBAND_ALEN
)
2166 memcpy(eui
, dev
->dev_addr
+ 12, 8);
2171 static int __ipv6_isatap_ifid(u8
*eui
, __be32 addr
)
2175 eui
[0] = (ipv4_is_zeronet(addr
) || ipv4_is_private_10(addr
) ||
2176 ipv4_is_loopback(addr
) || ipv4_is_linklocal_169(addr
) ||
2177 ipv4_is_private_172(addr
) || ipv4_is_test_192(addr
) ||
2178 ipv4_is_anycast_6to4(addr
) || ipv4_is_private_192(addr
) ||
2179 ipv4_is_test_198(addr
) || ipv4_is_multicast(addr
) ||
2180 ipv4_is_lbcast(addr
)) ? 0x00 : 0x02;
2184 memcpy(eui
+ 4, &addr
, 4);
2188 static int addrconf_ifid_sit(u8
*eui
, struct net_device
*dev
)
2190 if (dev
->priv_flags
& IFF_ISATAP
)
2191 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
2195 static int addrconf_ifid_gre(u8
*eui
, struct net_device
*dev
)
2197 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
2200 static int addrconf_ifid_ip6tnl(u8
*eui
, struct net_device
*dev
)
2202 memcpy(eui
, dev
->perm_addr
, 3);
2203 memcpy(eui
+ 5, dev
->perm_addr
+ 3, 3);
2210 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
2212 switch (dev
->type
) {
2215 return addrconf_ifid_eui48(eui
, dev
);
2217 return addrconf_ifid_arcnet(eui
, dev
);
2218 case ARPHRD_INFINIBAND
:
2219 return addrconf_ifid_infiniband(eui
, dev
);
2221 return addrconf_ifid_sit(eui
, dev
);
2224 return addrconf_ifid_gre(eui
, dev
);
2225 case ARPHRD_6LOWPAN
:
2226 return addrconf_ifid_6lowpan(eui
, dev
);
2227 case ARPHRD_IEEE1394
:
2228 return addrconf_ifid_ieee1394(eui
, dev
);
2229 case ARPHRD_TUNNEL6
:
2231 return addrconf_ifid_ip6tnl(eui
, dev
);
2236 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
2239 struct inet6_ifaddr
*ifp
;
2241 read_lock_bh(&idev
->lock
);
2242 list_for_each_entry_reverse(ifp
, &idev
->addr_list
, if_list
) {
2243 if (ifp
->scope
> IFA_LINK
)
2245 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2246 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
2251 read_unlock_bh(&idev
->lock
);
2255 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
2256 static void ipv6_regen_rndid(struct inet6_dev
*idev
)
2259 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
2260 idev
->rndid
[0] &= ~0x02;
2263 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
2264 * check if generated address is not inappropriate
2266 * - Reserved subnet anycast (RFC 2526)
2267 * 11111101 11....11 1xxxxxxx
2268 * - ISATAP (RFC4214) 6.1
2269 * 00-00-5E-FE-xx-xx-xx-xx
2271 * - XXX: already assigned to an address on the device
2273 if (idev
->rndid
[0] == 0xfd &&
2274 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
2275 (idev
->rndid
[7]&0x80))
2277 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
2278 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
2280 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
2285 static void ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
)
2287 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
2288 ipv6_regen_rndid(idev
);
2296 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
2297 unsigned long expires
, u32 flags
)
2299 struct fib6_config cfg
= {
2300 .fc_table
= l3mdev_fib_table(dev
) ? : RT6_TABLE_PREFIX
,
2301 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
2302 .fc_ifindex
= dev
->ifindex
,
2303 .fc_expires
= expires
,
2305 .fc_flags
= RTF_UP
| flags
,
2306 .fc_nlinfo
.nl_net
= dev_net(dev
),
2307 .fc_protocol
= RTPROT_KERNEL
,
2312 /* Prevent useless cloning on PtP SIT.
2313 This thing is done here expecting that the whole
2314 class of non-broadcast devices need not cloning.
2316 #if IS_ENABLED(CONFIG_IPV6_SIT)
2317 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
2318 cfg
.fc_flags
|= RTF_NONEXTHOP
;
2321 ip6_route_add(&cfg
, NULL
);
2325 static struct rt6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
2327 const struct net_device
*dev
,
2328 u32 flags
, u32 noflags
)
2330 struct fib6_node
*fn
;
2331 struct rt6_info
*rt
= NULL
;
2332 struct fib6_table
*table
;
2333 u32 tb_id
= l3mdev_fib_table(dev
) ? : RT6_TABLE_PREFIX
;
2335 table
= fib6_get_table(dev_net(dev
), tb_id
);
2340 fn
= fib6_locate(&table
->tb6_root
, pfx
, plen
, NULL
, 0, true);
2344 for_each_fib6_node_rt_rcu(fn
) {
2345 if (rt
->dst
.dev
->ifindex
!= dev
->ifindex
)
2347 if ((rt
->rt6i_flags
& flags
) != flags
)
2349 if ((rt
->rt6i_flags
& noflags
) != 0)
2351 if (!dst_hold_safe(&rt
->dst
))
2361 /* Create "default" multicast route to the interface */
2363 static void addrconf_add_mroute(struct net_device
*dev
)
2365 struct fib6_config cfg
= {
2366 .fc_table
= l3mdev_fib_table(dev
) ? : RT6_TABLE_LOCAL
,
2367 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
2368 .fc_ifindex
= dev
->ifindex
,
2371 .fc_nlinfo
.nl_net
= dev_net(dev
),
2374 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
2376 ip6_route_add(&cfg
, NULL
);
2379 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
2381 struct inet6_dev
*idev
;
2385 idev
= ipv6_find_idev(dev
);
2387 return ERR_PTR(-ENOBUFS
);
2389 if (idev
->cnf
.disable_ipv6
)
2390 return ERR_PTR(-EACCES
);
2392 /* Add default multicast route */
2393 if (!(dev
->flags
& IFF_LOOPBACK
) && !netif_is_l3_master(dev
))
2394 addrconf_add_mroute(dev
);
2399 static void manage_tempaddrs(struct inet6_dev
*idev
,
2400 struct inet6_ifaddr
*ifp
,
2401 __u32 valid_lft
, __u32 prefered_lft
,
2402 bool create
, unsigned long now
)
2405 struct inet6_ifaddr
*ift
;
2407 read_lock_bh(&idev
->lock
);
2408 /* update all temporary addresses in the list */
2409 list_for_each_entry(ift
, &idev
->tempaddr_list
, tmp_list
) {
2410 int age
, max_valid
, max_prefered
;
2412 if (ifp
!= ift
->ifpub
)
2415 /* RFC 4941 section 3.3:
2416 * If a received option will extend the lifetime of a public
2417 * address, the lifetimes of temporary addresses should
2418 * be extended, subject to the overall constraint that no
2419 * temporary addresses should ever remain "valid" or "preferred"
2420 * for a time longer than (TEMP_VALID_LIFETIME) or
2421 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), respectively.
2423 age
= (now
- ift
->cstamp
) / HZ
;
2424 max_valid
= idev
->cnf
.temp_valid_lft
- age
;
2428 max_prefered
= idev
->cnf
.temp_prefered_lft
-
2429 idev
->desync_factor
- age
;
2430 if (max_prefered
< 0)
2433 if (valid_lft
> max_valid
)
2434 valid_lft
= max_valid
;
2436 if (prefered_lft
> max_prefered
)
2437 prefered_lft
= max_prefered
;
2439 spin_lock(&ift
->lock
);
2441 ift
->valid_lft
= valid_lft
;
2442 ift
->prefered_lft
= prefered_lft
;
2444 if (prefered_lft
> 0)
2445 ift
->flags
&= ~IFA_F_DEPRECATED
;
2447 spin_unlock(&ift
->lock
);
2448 if (!(flags
&IFA_F_TENTATIVE
))
2449 ipv6_ifa_notify(0, ift
);
2452 if ((create
|| list_empty(&idev
->tempaddr_list
)) &&
2453 idev
->cnf
.use_tempaddr
> 0) {
2454 /* When a new public address is created as described
2455 * in [ADDRCONF], also create a new temporary address.
2456 * Also create a temporary address if it's enabled but
2457 * no temporary address currently exists.
2459 read_unlock_bh(&idev
->lock
);
2460 ipv6_create_tempaddr(ifp
, NULL
, false);
2462 read_unlock_bh(&idev
->lock
);
2466 static bool is_addr_mode_generate_stable(struct inet6_dev
*idev
)
2468 return idev
->cnf
.addr_gen_mode
== IN6_ADDR_GEN_MODE_STABLE_PRIVACY
||
2469 idev
->cnf
.addr_gen_mode
== IN6_ADDR_GEN_MODE_RANDOM
;
2472 int addrconf_prefix_rcv_add_addr(struct net
*net
, struct net_device
*dev
,
2473 const struct prefix_info
*pinfo
,
2474 struct inet6_dev
*in6_dev
,
2475 const struct in6_addr
*addr
, int addr_type
,
2476 u32 addr_flags
, bool sllao
, bool tokenized
,
2477 __u32 valid_lft
, u32 prefered_lft
)
2479 struct inet6_ifaddr
*ifp
= ipv6_get_ifaddr(net
, addr
, dev
, 1);
2480 int create
= 0, update_lft
= 0;
2482 if (!ifp
&& valid_lft
) {
2483 int max_addresses
= in6_dev
->cnf
.max_addresses
;
2485 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2486 if ((net
->ipv6
.devconf_all
->optimistic_dad
||
2487 in6_dev
->cnf
.optimistic_dad
) &&
2488 !net
->ipv6
.devconf_all
->forwarding
&& sllao
)
2489 addr_flags
|= IFA_F_OPTIMISTIC
;
2492 /* Do not allow to create too much of autoconfigured
2493 * addresses; this would be too easy way to crash kernel.
2495 if (!max_addresses
||
2496 ipv6_count_addresses(in6_dev
) < max_addresses
)
2497 ifp
= ipv6_add_addr(in6_dev
, addr
, NULL
,
2499 addr_type
&IPV6_ADDR_SCOPE_MASK
,
2500 addr_flags
, valid_lft
,
2501 prefered_lft
, false, NULL
);
2503 if (IS_ERR_OR_NULL(ifp
))
2508 spin_lock_bh(&ifp
->lock
);
2509 ifp
->flags
|= IFA_F_MANAGETEMPADDR
;
2510 ifp
->cstamp
= jiffies
;
2511 ifp
->tokenized
= tokenized
;
2512 spin_unlock_bh(&ifp
->lock
);
2513 addrconf_dad_start(ifp
);
2521 /* update lifetime (RFC2462 5.5.3 e) */
2522 spin_lock_bh(&ifp
->lock
);
2524 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
2525 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
2528 if (!update_lft
&& !create
&& stored_lft
) {
2529 const u32 minimum_lft
= min_t(u32
,
2530 stored_lft
, MIN_VALID_LIFETIME
);
2531 valid_lft
= max(valid_lft
, minimum_lft
);
2533 /* RFC4862 Section 5.5.3e:
2534 * "Note that the preferred lifetime of the
2535 * corresponding address is always reset to
2536 * the Preferred Lifetime in the received
2537 * Prefix Information option, regardless of
2538 * whether the valid lifetime is also reset or
2541 * So we should always update prefered_lft here.
2547 ifp
->valid_lft
= valid_lft
;
2548 ifp
->prefered_lft
= prefered_lft
;
2551 ifp
->flags
&= ~IFA_F_DEPRECATED
;
2552 spin_unlock_bh(&ifp
->lock
);
2554 if (!(flags
&IFA_F_TENTATIVE
))
2555 ipv6_ifa_notify(0, ifp
);
2557 spin_unlock_bh(&ifp
->lock
);
2559 manage_tempaddrs(in6_dev
, ifp
, valid_lft
, prefered_lft
,
2568 EXPORT_SYMBOL_GPL(addrconf_prefix_rcv_add_addr
);
2570 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
, bool sllao
)
2572 struct prefix_info
*pinfo
;
2577 struct inet6_dev
*in6_dev
;
2578 struct net
*net
= dev_net(dev
);
2580 pinfo
= (struct prefix_info
*) opt
;
2582 if (len
< sizeof(struct prefix_info
)) {
2583 ADBG("addrconf: prefix option too short\n");
2588 * Validation checks ([ADDRCONF], page 19)
2591 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
2593 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
2596 valid_lft
= ntohl(pinfo
->valid
);
2597 prefered_lft
= ntohl(pinfo
->prefered
);
2599 if (prefered_lft
> valid_lft
) {
2600 net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n");
2604 in6_dev
= in6_dev_get(dev
);
2607 net_dbg_ratelimited("addrconf: device %s not configured\n",
2613 * Two things going on here:
2614 * 1) Add routes for on-link prefixes
2615 * 2) Configure prefixes with the auto flag set
2618 if (pinfo
->onlink
) {
2619 struct rt6_info
*rt
;
2620 unsigned long rt_expires
;
2622 /* Avoid arithmetic overflow. Really, we could
2623 * save rt_expires in seconds, likely valid_lft,
2624 * but it would require division in fib gc, that it
2628 rt_expires
= addrconf_timeout_fixup(valid_lft
, HZ
);
2630 rt_expires
= addrconf_timeout_fixup(valid_lft
, USER_HZ
);
2632 if (addrconf_finite_timeout(rt_expires
))
2635 rt
= addrconf_get_prefix_route(&pinfo
->prefix
,
2638 RTF_ADDRCONF
| RTF_PREFIX_RT
,
2639 RTF_GATEWAY
| RTF_DEFAULT
);
2642 /* Autoconf prefix route */
2643 if (valid_lft
== 0) {
2646 } else if (addrconf_finite_timeout(rt_expires
)) {
2648 rt6_set_expires(rt
, jiffies
+ rt_expires
);
2650 rt6_clean_expires(rt
);
2652 } else if (valid_lft
) {
2653 clock_t expires
= 0;
2654 int flags
= RTF_ADDRCONF
| RTF_PREFIX_RT
;
2655 if (addrconf_finite_timeout(rt_expires
)) {
2657 flags
|= RTF_EXPIRES
;
2658 expires
= jiffies_to_clock_t(rt_expires
);
2660 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
2661 dev
, expires
, flags
);
2666 /* Try to figure out our local address for this prefix */
2668 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
2669 struct in6_addr addr
;
2670 bool tokenized
= false, dev_addr_generated
= false;
2672 if (pinfo
->prefix_len
== 64) {
2673 memcpy(&addr
, &pinfo
->prefix
, 8);
2675 if (!ipv6_addr_any(&in6_dev
->token
)) {
2676 read_lock_bh(&in6_dev
->lock
);
2677 memcpy(addr
.s6_addr
+ 8,
2678 in6_dev
->token
.s6_addr
+ 8, 8);
2679 read_unlock_bh(&in6_dev
->lock
);
2681 } else if (is_addr_mode_generate_stable(in6_dev
) &&
2682 !ipv6_generate_stable_address(&addr
, 0,
2684 addr_flags
|= IFA_F_STABLE_PRIVACY
;
2686 } else if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
2687 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
2690 dev_addr_generated
= true;
2694 net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n",
2699 err
= addrconf_prefix_rcv_add_addr(net
, dev
, pinfo
, in6_dev
,
2702 tokenized
, valid_lft
,
2707 /* Ignore error case here because previous prefix add addr was
2708 * successful which will be notified.
2710 ndisc_ops_prefix_rcv_add_addr(net
, dev
, pinfo
, in6_dev
, &addr
,
2711 addr_type
, addr_flags
, sllao
,
2712 tokenized
, valid_lft
,
2714 dev_addr_generated
);
2716 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
2718 in6_dev_put(in6_dev
);
2722 * Set destination address.
2723 * Special case for SIT interfaces where we create a new "virtual"
2726 int addrconf_set_dstaddr(struct net
*net
, void __user
*arg
)
2728 struct in6_ifreq ireq
;
2729 struct net_device
*dev
;
2735 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2738 dev
= __dev_get_by_index(net
, ireq
.ifr6_ifindex
);
2744 #if IS_ENABLED(CONFIG_IPV6_SIT)
2745 if (dev
->type
== ARPHRD_SIT
) {
2746 const struct net_device_ops
*ops
= dev
->netdev_ops
;
2748 struct ip_tunnel_parm p
;
2750 err
= -EADDRNOTAVAIL
;
2751 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
2754 memset(&p
, 0, sizeof(p
));
2755 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
2759 p
.iph
.protocol
= IPPROTO_IPV6
;
2761 ifr
.ifr_ifru
.ifru_data
= (__force
void __user
*)&p
;
2763 if (ops
->ndo_do_ioctl
) {
2764 mm_segment_t oldfs
= get_fs();
2767 err
= ops
->ndo_do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
2774 dev
= __dev_get_by_name(net
, p
.name
);
2777 err
= dev_open(dev
);
2787 static int ipv6_mc_config(struct sock
*sk
, bool join
,
2788 const struct in6_addr
*addr
, int ifindex
)
2796 ret
= ipv6_sock_mc_join(sk
, ifindex
, addr
);
2798 ret
= ipv6_sock_mc_drop(sk
, ifindex
, addr
);
2805 * Manual configuration of address on an interface
2807 static int inet6_addr_add(struct net
*net
, int ifindex
,
2808 const struct in6_addr
*pfx
,
2809 const struct in6_addr
*peer_pfx
,
2810 unsigned int plen
, __u32 ifa_flags
,
2811 __u32 prefered_lft
, __u32 valid_lft
,
2812 struct netlink_ext_ack
*extack
)
2814 struct inet6_ifaddr
*ifp
;
2815 struct inet6_dev
*idev
;
2816 struct net_device
*dev
;
2817 unsigned long timeout
;
2827 /* check the lifetime */
2828 if (!valid_lft
|| prefered_lft
> valid_lft
)
2831 if (ifa_flags
& IFA_F_MANAGETEMPADDR
&& plen
!= 64)
2834 dev
= __dev_get_by_index(net
, ifindex
);
2838 idev
= addrconf_add_dev(dev
);
2840 return PTR_ERR(idev
);
2842 if (ifa_flags
& IFA_F_MCAUTOJOIN
) {
2843 int ret
= ipv6_mc_config(net
->ipv6
.mc_autojoin_sk
,
2844 true, pfx
, ifindex
);
2850 scope
= ipv6_addr_scope(pfx
);
2852 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
2853 if (addrconf_finite_timeout(timeout
)) {
2854 expires
= jiffies_to_clock_t(timeout
* HZ
);
2855 valid_lft
= timeout
;
2856 flags
= RTF_EXPIRES
;
2860 ifa_flags
|= IFA_F_PERMANENT
;
2863 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
2864 if (addrconf_finite_timeout(timeout
)) {
2866 ifa_flags
|= IFA_F_DEPRECATED
;
2867 prefered_lft
= timeout
;
2870 ifp
= ipv6_add_addr(idev
, pfx
, peer_pfx
, plen
, scope
, ifa_flags
,
2871 valid_lft
, prefered_lft
, true, extack
);
2874 if (!(ifa_flags
& IFA_F_NOPREFIXROUTE
)) {
2875 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
2880 * Note that section 3.1 of RFC 4429 indicates
2881 * that the Optimistic flag should not be set for
2882 * manually configured addresses
2884 addrconf_dad_start(ifp
);
2885 if (ifa_flags
& IFA_F_MANAGETEMPADDR
)
2886 manage_tempaddrs(idev
, ifp
, valid_lft
, prefered_lft
,
2889 addrconf_verify_rtnl();
2891 } else if (ifa_flags
& IFA_F_MCAUTOJOIN
) {
2892 ipv6_mc_config(net
->ipv6
.mc_autojoin_sk
,
2893 false, pfx
, ifindex
);
2896 return PTR_ERR(ifp
);
2899 static int inet6_addr_del(struct net
*net
, int ifindex
, u32 ifa_flags
,
2900 const struct in6_addr
*pfx
, unsigned int plen
)
2902 struct inet6_ifaddr
*ifp
;
2903 struct inet6_dev
*idev
;
2904 struct net_device
*dev
;
2909 dev
= __dev_get_by_index(net
, ifindex
);
2913 idev
= __in6_dev_get(dev
);
2917 read_lock_bh(&idev
->lock
);
2918 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
2919 if (ifp
->prefix_len
== plen
&&
2920 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
2922 read_unlock_bh(&idev
->lock
);
2924 if (!(ifp
->flags
& IFA_F_TEMPORARY
) &&
2925 (ifa_flags
& IFA_F_MANAGETEMPADDR
))
2926 manage_tempaddrs(idev
, ifp
, 0, 0, false,
2929 addrconf_verify_rtnl();
2930 if (ipv6_addr_is_multicast(pfx
)) {
2931 ipv6_mc_config(net
->ipv6
.mc_autojoin_sk
,
2932 false, pfx
, dev
->ifindex
);
2937 read_unlock_bh(&idev
->lock
);
2938 return -EADDRNOTAVAIL
;
2942 int addrconf_add_ifaddr(struct net
*net
, void __user
*arg
)
2944 struct in6_ifreq ireq
;
2947 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
2950 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2954 err
= inet6_addr_add(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, NULL
,
2955 ireq
.ifr6_prefixlen
, IFA_F_PERMANENT
,
2956 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
, NULL
);
2961 int addrconf_del_ifaddr(struct net
*net
, void __user
*arg
)
2963 struct in6_ifreq ireq
;
2966 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
2969 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2973 err
= inet6_addr_del(net
, ireq
.ifr6_ifindex
, 0, &ireq
.ifr6_addr
,
2974 ireq
.ifr6_prefixlen
);
2979 static void add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
2980 int plen
, int scope
)
2982 struct inet6_ifaddr
*ifp
;
2984 ifp
= ipv6_add_addr(idev
, addr
, NULL
, plen
,
2985 scope
, IFA_F_PERMANENT
,
2986 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
,
2989 spin_lock_bh(&ifp
->lock
);
2990 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2991 spin_unlock_bh(&ifp
->lock
);
2992 rt_genid_bump_ipv6(dev_net(idev
->dev
));
2993 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2998 #if IS_ENABLED(CONFIG_IPV6_SIT)
2999 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
3001 struct in6_addr addr
;
3002 struct net_device
*dev
;
3003 struct net
*net
= dev_net(idev
->dev
);
3009 memset(&addr
, 0, sizeof(struct in6_addr
));
3010 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
3012 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
3013 addr
.s6_addr32
[0] = htonl(0xfe800000);
3017 scope
= IPV6_ADDR_COMPATv4
;
3019 pflags
|= RTF_NONEXTHOP
;
3022 if (addr
.s6_addr32
[3]) {
3023 add_addr(idev
, &addr
, plen
, scope
);
3024 addrconf_prefix_route(&addr
, plen
, idev
->dev
, 0, pflags
);
3028 for_each_netdev(net
, dev
) {
3029 struct in_device
*in_dev
= __in_dev_get_rtnl(dev
);
3030 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
3031 struct in_ifaddr
*ifa
;
3035 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
3037 addr
.s6_addr32
[3] = ifa
->ifa_local
;
3039 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
3041 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
3042 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
3047 add_addr(idev
, &addr
, plen
, flag
);
3048 addrconf_prefix_route(&addr
, plen
, idev
->dev
, 0,
3056 static void init_loopback(struct net_device
*dev
)
3058 struct inet6_dev
*idev
;
3064 idev
= ipv6_find_idev(dev
);
3066 pr_debug("%s: add_dev failed\n", __func__
);
3070 add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
);
3073 void addrconf_add_linklocal(struct inet6_dev
*idev
,
3074 const struct in6_addr
*addr
, u32 flags
)
3076 struct inet6_ifaddr
*ifp
;
3077 u32 addr_flags
= flags
| IFA_F_PERMANENT
;
3079 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3080 if ((dev_net(idev
->dev
)->ipv6
.devconf_all
->optimistic_dad
||
3081 idev
->cnf
.optimistic_dad
) &&
3082 !dev_net(idev
->dev
)->ipv6
.devconf_all
->forwarding
)
3083 addr_flags
|= IFA_F_OPTIMISTIC
;
3086 ifp
= ipv6_add_addr(idev
, addr
, NULL
, 64, IFA_LINK
, addr_flags
,
3087 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
, true, NULL
);
3089 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
3090 addrconf_dad_start(ifp
);
3094 EXPORT_SYMBOL_GPL(addrconf_add_linklocal
);
3096 static bool ipv6_reserved_interfaceid(struct in6_addr address
)
3098 if ((address
.s6_addr32
[2] | address
.s6_addr32
[3]) == 0)
3101 if (address
.s6_addr32
[2] == htonl(0x02005eff) &&
3102 ((address
.s6_addr32
[3] & htonl(0xfe000000)) == htonl(0xfe000000)))
3105 if (address
.s6_addr32
[2] == htonl(0xfdffffff) &&
3106 ((address
.s6_addr32
[3] & htonl(0xffffff80)) == htonl(0xffffff80)))
3112 static int ipv6_generate_stable_address(struct in6_addr
*address
,
3114 const struct inet6_dev
*idev
)
3116 static DEFINE_SPINLOCK(lock
);
3117 static __u32 digest
[SHA_DIGEST_WORDS
];
3118 static __u32 workspace
[SHA_WORKSPACE_WORDS
];
3121 char __data
[SHA_MESSAGE_BYTES
];
3123 struct in6_addr secret
;
3125 unsigned char hwaddr
[MAX_ADDR_LEN
];
3130 struct in6_addr secret
;
3131 struct in6_addr temp
;
3132 struct net
*net
= dev_net(idev
->dev
);
3134 BUILD_BUG_ON(sizeof(data
.__data
) != sizeof(data
));
3136 if (idev
->cnf
.stable_secret
.initialized
)
3137 secret
= idev
->cnf
.stable_secret
.secret
;
3138 else if (net
->ipv6
.devconf_dflt
->stable_secret
.initialized
)
3139 secret
= net
->ipv6
.devconf_dflt
->stable_secret
.secret
;
3144 spin_lock_bh(&lock
);
3147 memset(&data
, 0, sizeof(data
));
3148 memset(workspace
, 0, sizeof(workspace
));
3149 memcpy(data
.hwaddr
, idev
->dev
->perm_addr
, idev
->dev
->addr_len
);
3150 data
.prefix
[0] = address
->s6_addr32
[0];
3151 data
.prefix
[1] = address
->s6_addr32
[1];
3152 data
.secret
= secret
;
3153 data
.dad_count
= dad_count
;
3155 sha_transform(digest
, data
.__data
, workspace
);
3158 temp
.s6_addr32
[2] = (__force __be32
)digest
[0];
3159 temp
.s6_addr32
[3] = (__force __be32
)digest
[1];
3161 spin_unlock_bh(&lock
);
3163 if (ipv6_reserved_interfaceid(temp
)) {
3165 if (dad_count
> dev_net(idev
->dev
)->ipv6
.sysctl
.idgen_retries
)
3174 static void ipv6_gen_mode_random_init(struct inet6_dev
*idev
)
3176 struct ipv6_stable_secret
*s
= &idev
->cnf
.stable_secret
;
3180 s
= &idev
->cnf
.stable_secret
;
3181 get_random_bytes(&s
->secret
, sizeof(s
->secret
));
3182 s
->initialized
= true;
3185 static void addrconf_addr_gen(struct inet6_dev
*idev
, bool prefix_route
)
3187 struct in6_addr addr
;
3189 /* no link local addresses on L3 master devices */
3190 if (netif_is_l3_master(idev
->dev
))
3193 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
3195 switch (idev
->cnf
.addr_gen_mode
) {
3196 case IN6_ADDR_GEN_MODE_RANDOM
:
3197 ipv6_gen_mode_random_init(idev
);
3199 case IN6_ADDR_GEN_MODE_STABLE_PRIVACY
:
3200 if (!ipv6_generate_stable_address(&addr
, 0, idev
))
3201 addrconf_add_linklocal(idev
, &addr
,
3202 IFA_F_STABLE_PRIVACY
);
3203 else if (prefix_route
)
3204 addrconf_prefix_route(&addr
, 64, idev
->dev
, 0, 0);
3206 case IN6_ADDR_GEN_MODE_EUI64
:
3207 /* addrconf_add_linklocal also adds a prefix_route and we
3208 * only need to care about prefix routes if ipv6_generate_eui64
3209 * couldn't generate one.
3211 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) == 0)
3212 addrconf_add_linklocal(idev
, &addr
, 0);
3213 else if (prefix_route
)
3214 addrconf_prefix_route(&addr
, 64, idev
->dev
, 0, 0);
3216 case IN6_ADDR_GEN_MODE_NONE
:
3218 /* will not add any link local address */
3223 static void addrconf_dev_config(struct net_device
*dev
)
3225 struct inet6_dev
*idev
;
3229 if ((dev
->type
!= ARPHRD_ETHER
) &&
3230 (dev
->type
!= ARPHRD_FDDI
) &&
3231 (dev
->type
!= ARPHRD_ARCNET
) &&
3232 (dev
->type
!= ARPHRD_INFINIBAND
) &&
3233 (dev
->type
!= ARPHRD_IEEE1394
) &&
3234 (dev
->type
!= ARPHRD_TUNNEL6
) &&
3235 (dev
->type
!= ARPHRD_6LOWPAN
) &&
3236 (dev
->type
!= ARPHRD_IP6GRE
) &&
3237 (dev
->type
!= ARPHRD_IPGRE
) &&
3238 (dev
->type
!= ARPHRD_TUNNEL
) &&
3239 (dev
->type
!= ARPHRD_NONE
)) {
3240 /* Alas, we support only Ethernet autoconfiguration. */
3244 idev
= addrconf_add_dev(dev
);
3248 /* this device type has no EUI support */
3249 if (dev
->type
== ARPHRD_NONE
&&
3250 idev
->cnf
.addr_gen_mode
== IN6_ADDR_GEN_MODE_EUI64
)
3251 idev
->cnf
.addr_gen_mode
= IN6_ADDR_GEN_MODE_RANDOM
;
3253 addrconf_addr_gen(idev
, false);
3256 #if IS_ENABLED(CONFIG_IPV6_SIT)
3257 static void addrconf_sit_config(struct net_device
*dev
)
3259 struct inet6_dev
*idev
;
3264 * Configure the tunnel with one of our IPv4
3265 * addresses... we should configure all of
3266 * our v4 addrs in the tunnel
3269 idev
= ipv6_find_idev(dev
);
3271 pr_debug("%s: add_dev failed\n", __func__
);
3275 if (dev
->priv_flags
& IFF_ISATAP
) {
3276 addrconf_addr_gen(idev
, false);
3280 sit_add_v4_addrs(idev
);
3282 if (dev
->flags
&IFF_POINTOPOINT
)
3283 addrconf_add_mroute(dev
);
3287 #if IS_ENABLED(CONFIG_NET_IPGRE)
3288 static void addrconf_gre_config(struct net_device
*dev
)
3290 struct inet6_dev
*idev
;
3294 idev
= ipv6_find_idev(dev
);
3296 pr_debug("%s: add_dev failed\n", __func__
);
3300 addrconf_addr_gen(idev
, true);
3301 if (dev
->flags
& IFF_POINTOPOINT
)
3302 addrconf_add_mroute(dev
);
3306 static int fixup_permanent_addr(struct inet6_dev
*idev
,
3307 struct inet6_ifaddr
*ifp
)
3309 /* !rt6i_node means the host route was removed from the
3310 * FIB, for example, if 'lo' device is taken down. In that
3311 * case regenerate the host route.
3313 if (!ifp
->rt
|| !ifp
->rt
->rt6i_node
) {
3314 struct rt6_info
*rt
, *prev
;
3316 rt
= addrconf_dst_alloc(idev
, &ifp
->addr
, false);
3320 /* ifp->rt can be accessed outside of rtnl */
3321 spin_lock(&ifp
->lock
);
3324 spin_unlock(&ifp
->lock
);
3329 if (!(ifp
->flags
& IFA_F_NOPREFIXROUTE
)) {
3330 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
,
3334 if (ifp
->state
== INET6_IFADDR_STATE_PREDAD
)
3335 addrconf_dad_start(ifp
);
3340 static void addrconf_permanent_addr(struct net_device
*dev
)
3342 struct inet6_ifaddr
*ifp
, *tmp
;
3343 struct inet6_dev
*idev
;
3345 idev
= __in6_dev_get(dev
);
3349 write_lock_bh(&idev
->lock
);
3351 list_for_each_entry_safe(ifp
, tmp
, &idev
->addr_list
, if_list
) {
3352 if ((ifp
->flags
& IFA_F_PERMANENT
) &&
3353 fixup_permanent_addr(idev
, ifp
) < 0) {
3354 write_unlock_bh(&idev
->lock
);
3357 write_lock_bh(&idev
->lock
);
3359 net_info_ratelimited("%s: Failed to add prefix route for address %pI6c; dropping\n",
3360 idev
->dev
->name
, &ifp
->addr
);
3364 write_unlock_bh(&idev
->lock
);
3367 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
3370 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
3371 struct netdev_notifier_changeupper_info
*info
;
3372 struct inet6_dev
*idev
= __in6_dev_get(dev
);
3373 struct net
*net
= dev_net(dev
);
3374 int run_pending
= 0;
3378 case NETDEV_REGISTER
:
3379 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
3380 idev
= ipv6_add_dev(dev
);
3382 return notifier_from_errno(PTR_ERR(idev
));
3386 case NETDEV_CHANGEMTU
:
3387 /* if MTU under IPV6_MIN_MTU stop IPv6 on this interface. */
3388 if (dev
->mtu
< IPV6_MIN_MTU
) {
3389 addrconf_ifdown(dev
, dev
!= net
->loopback_dev
);
3394 rt6_mtu_change(dev
, dev
->mtu
);
3395 idev
->cnf
.mtu6
= dev
->mtu
;
3399 /* allocate new idev */
3400 idev
= ipv6_add_dev(dev
);
3404 /* device is still not ready */
3405 if (!(idev
->if_flags
& IF_READY
))
3414 if (dev
->flags
& IFF_SLAVE
)
3417 if (idev
&& idev
->cnf
.disable_ipv6
)
3420 if (event
== NETDEV_UP
) {
3421 /* restore routes for permanent addresses */
3422 addrconf_permanent_addr(dev
);
3424 if (!addrconf_link_ready(dev
)) {
3425 /* device is not ready yet. */
3426 pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n",
3431 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
3432 idev
= ipv6_add_dev(dev
);
3434 if (!IS_ERR_OR_NULL(idev
)) {
3435 idev
->if_flags
|= IF_READY
;
3438 } else if (event
== NETDEV_CHANGE
) {
3439 if (!addrconf_link_ready(dev
)) {
3440 /* device is still not ready. */
3445 if (idev
->if_flags
& IF_READY
) {
3446 /* device is already configured -
3447 * but resend MLD reports, we might
3448 * have roamed and need to update
3449 * multicast snooping switches
3454 idev
->if_flags
|= IF_READY
;
3457 pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n",
3463 switch (dev
->type
) {
3464 #if IS_ENABLED(CONFIG_IPV6_SIT)
3466 addrconf_sit_config(dev
);
3469 #if IS_ENABLED(CONFIG_NET_IPGRE)
3471 addrconf_gre_config(dev
);
3474 case ARPHRD_LOOPBACK
:
3479 addrconf_dev_config(dev
);
3483 if (!IS_ERR_OR_NULL(idev
)) {
3485 addrconf_dad_run(idev
);
3488 * If the MTU changed during the interface down,
3489 * when the interface up, the changed MTU must be
3490 * reflected in the idev as well as routers.
3492 if (idev
->cnf
.mtu6
!= dev
->mtu
&&
3493 dev
->mtu
>= IPV6_MIN_MTU
) {
3494 rt6_mtu_change(dev
, dev
->mtu
);
3495 idev
->cnf
.mtu6
= dev
->mtu
;
3497 idev
->tstamp
= jiffies
;
3498 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
3501 * If the changed mtu during down is lower than
3502 * IPV6_MIN_MTU stop IPv6 on this interface.
3504 if (dev
->mtu
< IPV6_MIN_MTU
)
3505 addrconf_ifdown(dev
, dev
!= net
->loopback_dev
);
3510 case NETDEV_UNREGISTER
:
3512 * Remove all addresses from this interface.
3514 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
3517 case NETDEV_CHANGENAME
:
3519 snmp6_unregister_dev(idev
);
3520 addrconf_sysctl_unregister(idev
);
3521 err
= addrconf_sysctl_register(idev
);
3523 return notifier_from_errno(err
);
3524 err
= snmp6_register_dev(idev
);
3526 addrconf_sysctl_unregister(idev
);
3527 return notifier_from_errno(err
);
3532 case NETDEV_PRE_TYPE_CHANGE
:
3533 case NETDEV_POST_TYPE_CHANGE
:
3535 addrconf_type_change(dev
, event
);
3538 case NETDEV_CHANGEUPPER
:
3541 /* flush all routes if dev is linked to or unlinked from
3542 * an L3 master device (e.g., VRF)
3544 if (info
->upper_dev
&& netif_is_l3_master(info
->upper_dev
))
3545 addrconf_ifdown(dev
, 0);
3552 * addrconf module should be notified of a device going up
3554 static struct notifier_block ipv6_dev_notf
= {
3555 .notifier_call
= addrconf_notify
,
3556 .priority
= ADDRCONF_NOTIFY_PRIORITY
,
3559 static void addrconf_type_change(struct net_device
*dev
, unsigned long event
)
3561 struct inet6_dev
*idev
;
3564 idev
= __in6_dev_get(dev
);
3566 if (event
== NETDEV_POST_TYPE_CHANGE
)
3567 ipv6_mc_remap(idev
);
3568 else if (event
== NETDEV_PRE_TYPE_CHANGE
)
3569 ipv6_mc_unmap(idev
);
3572 static bool addr_is_local(const struct in6_addr
*addr
)
3574 return ipv6_addr_type(addr
) &
3575 (IPV6_ADDR_LINKLOCAL
| IPV6_ADDR_LOOPBACK
);
3578 static int addrconf_ifdown(struct net_device
*dev
, int how
)
3580 struct net
*net
= dev_net(dev
);
3581 struct inet6_dev
*idev
;
3582 struct inet6_ifaddr
*ifa
, *tmp
;
3589 rt6_ifdown(net
, dev
);
3590 neigh_ifdown(&nd_tbl
, dev
);
3592 idev
= __in6_dev_get(dev
);
3597 * Step 1: remove reference to ipv6 device from parent device.
3603 /* protected by rtnl_lock */
3604 RCU_INIT_POINTER(dev
->ip6_ptr
, NULL
);
3606 /* Step 1.5: remove snmp6 entry */
3607 snmp6_unregister_dev(idev
);
3611 /* aggregate the system setting and interface setting */
3612 _keep_addr
= net
->ipv6
.devconf_all
->keep_addr_on_down
;
3614 _keep_addr
= idev
->cnf
.keep_addr_on_down
;
3616 /* combine the user config with event to determine if permanent
3617 * addresses are to be removed from address hash table
3619 keep_addr
= !(how
|| _keep_addr
<= 0 || idev
->cnf
.disable_ipv6
);
3621 /* Step 2: clear hash table */
3622 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
3623 struct hlist_head
*h
= &inet6_addr_lst
[i
];
3625 spin_lock_bh(&addrconf_hash_lock
);
3627 hlist_for_each_entry_rcu(ifa
, h
, addr_lst
) {
3628 if (ifa
->idev
== idev
) {
3629 addrconf_del_dad_work(ifa
);
3630 /* combined flag + permanent flag decide if
3631 * address is retained on a down event
3634 !(ifa
->flags
& IFA_F_PERMANENT
) ||
3635 addr_is_local(&ifa
->addr
)) {
3636 hlist_del_init_rcu(&ifa
->addr_lst
);
3641 spin_unlock_bh(&addrconf_hash_lock
);
3644 write_lock_bh(&idev
->lock
);
3646 addrconf_del_rs_timer(idev
);
3648 /* Step 2: clear flags for stateless addrconf */
3650 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
3652 /* Step 3: clear tempaddr list */
3653 while (!list_empty(&idev
->tempaddr_list
)) {
3654 ifa
= list_first_entry(&idev
->tempaddr_list
,
3655 struct inet6_ifaddr
, tmp_list
);
3656 list_del(&ifa
->tmp_list
);
3657 write_unlock_bh(&idev
->lock
);
3658 spin_lock_bh(&ifa
->lock
);
3661 in6_ifa_put(ifa
->ifpub
);
3664 spin_unlock_bh(&ifa
->lock
);
3666 write_lock_bh(&idev
->lock
);
3669 /* re-combine the user config with event to determine if permanent
3670 * addresses are to be removed from the interface list
3672 keep_addr
= (!how
&& _keep_addr
> 0 && !idev
->cnf
.disable_ipv6
);
3674 list_for_each_entry_safe(ifa
, tmp
, &idev
->addr_list
, if_list
) {
3675 struct rt6_info
*rt
= NULL
;
3678 addrconf_del_dad_work(ifa
);
3680 keep
= keep_addr
&& (ifa
->flags
& IFA_F_PERMANENT
) &&
3681 !addr_is_local(&ifa
->addr
);
3683 write_unlock_bh(&idev
->lock
);
3684 spin_lock_bh(&ifa
->lock
);
3687 /* set state to skip the notifier below */
3688 state
= INET6_IFADDR_STATE_DEAD
;
3689 ifa
->state
= INET6_IFADDR_STATE_PREDAD
;
3690 if (!(ifa
->flags
& IFA_F_NODAD
))
3691 ifa
->flags
|= IFA_F_TENTATIVE
;
3697 ifa
->state
= INET6_IFADDR_STATE_DEAD
;
3700 spin_unlock_bh(&ifa
->lock
);
3705 if (state
!= INET6_IFADDR_STATE_DEAD
) {
3706 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
3707 inet6addr_notifier_call_chain(NETDEV_DOWN
, ifa
);
3709 if (idev
->cnf
.forwarding
)
3710 addrconf_leave_anycast(ifa
);
3711 addrconf_leave_solict(ifa
->idev
, &ifa
->addr
);
3714 write_lock_bh(&idev
->lock
);
3716 list_del_rcu(&ifa
->if_list
);
3721 write_unlock_bh(&idev
->lock
);
3723 /* Step 5: Discard anycast and multicast list */
3725 ipv6_ac_destroy_dev(idev
);
3726 ipv6_mc_destroy_dev(idev
);
3731 idev
->tstamp
= jiffies
;
3733 /* Last: Shot the device (if unregistered) */
3735 addrconf_sysctl_unregister(idev
);
3736 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
3737 neigh_ifdown(&nd_tbl
, dev
);
3743 static void addrconf_rs_timer(struct timer_list
*t
)
3745 struct inet6_dev
*idev
= from_timer(idev
, t
, rs_timer
);
3746 struct net_device
*dev
= idev
->dev
;
3747 struct in6_addr lladdr
;
3749 write_lock(&idev
->lock
);
3750 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
))
3753 if (!ipv6_accept_ra(idev
))
3756 /* Announcement received after solicitation was sent */
3757 if (idev
->if_flags
& IF_RA_RCVD
)
3760 if (idev
->rs_probes
++ < idev
->cnf
.rtr_solicits
|| idev
->cnf
.rtr_solicits
< 0) {
3761 write_unlock(&idev
->lock
);
3762 if (!ipv6_get_lladdr(dev
, &lladdr
, IFA_F_TENTATIVE
))
3763 ndisc_send_rs(dev
, &lladdr
,
3764 &in6addr_linklocal_allrouters
);
3768 write_lock(&idev
->lock
);
3769 idev
->rs_interval
= rfc3315_s14_backoff_update(
3770 idev
->rs_interval
, idev
->cnf
.rtr_solicit_max_interval
);
3771 /* The wait after the last probe can be shorter */
3772 addrconf_mod_rs_timer(idev
, (idev
->rs_probes
==
3773 idev
->cnf
.rtr_solicits
) ?
3774 idev
->cnf
.rtr_solicit_delay
:
3778 * Note: we do not support deprecated "all on-link"
3779 * assumption any longer.
3781 pr_debug("%s: no IPv6 routers present\n", idev
->dev
->name
);
3785 write_unlock(&idev
->lock
);
3791 * Duplicate Address Detection
3793 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
3795 unsigned long rand_num
;
3796 struct inet6_dev
*idev
= ifp
->idev
;
3799 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
3802 rand_num
= prandom_u32() % (idev
->cnf
.rtr_solicit_delay
? : 1);
3805 if (idev
->cnf
.enhanced_dad
||
3806 dev_net(idev
->dev
)->ipv6
.devconf_all
->enhanced_dad
) {
3808 get_random_bytes(&nonce
, 6);
3811 ifp
->dad_nonce
= nonce
;
3812 ifp
->dad_probes
= idev
->cnf
.dad_transmits
;
3813 addrconf_mod_dad_work(ifp
, rand_num
);
3816 static void addrconf_dad_begin(struct inet6_ifaddr
*ifp
)
3818 struct inet6_dev
*idev
= ifp
->idev
;
3819 struct net_device
*dev
= idev
->dev
;
3820 bool bump_id
, notify
= false;
3822 addrconf_join_solict(dev
, &ifp
->addr
);
3824 prandom_seed((__force u32
) ifp
->addr
.s6_addr32
[3]);
3826 read_lock_bh(&idev
->lock
);
3827 spin_lock(&ifp
->lock
);
3828 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
)
3831 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
3832 (dev_net(dev
)->ipv6
.devconf_all
->accept_dad
< 1 &&
3833 idev
->cnf
.accept_dad
< 1) ||
3834 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
3835 ifp
->flags
& IFA_F_NODAD
) {
3836 bump_id
= ifp
->flags
& IFA_F_TENTATIVE
;
3837 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3838 spin_unlock(&ifp
->lock
);
3839 read_unlock_bh(&idev
->lock
);
3841 addrconf_dad_completed(ifp
, bump_id
);
3845 if (!(idev
->if_flags
& IF_READY
)) {
3846 spin_unlock(&ifp
->lock
);
3847 read_unlock_bh(&idev
->lock
);
3849 * If the device is not ready:
3850 * - keep it tentative if it is a permanent address.
3851 * - otherwise, kill it.
3854 addrconf_dad_stop(ifp
, 0);
3859 * Optimistic nodes can start receiving
3862 if (ifp
->flags
& IFA_F_OPTIMISTIC
) {
3863 ip6_ins_rt(ifp
->rt
);
3864 if (ipv6_use_optimistic_addr(dev_net(dev
), idev
)) {
3865 /* Because optimistic nodes can use this address,
3866 * notify listeners. If DAD fails, RTM_DELADDR is sent.
3872 addrconf_dad_kick(ifp
);
3874 spin_unlock(&ifp
->lock
);
3875 read_unlock_bh(&idev
->lock
);
3877 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
3880 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
)
3882 bool begin_dad
= false;
3884 spin_lock_bh(&ifp
->lock
);
3885 if (ifp
->state
!= INET6_IFADDR_STATE_DEAD
) {
3886 ifp
->state
= INET6_IFADDR_STATE_PREDAD
;
3889 spin_unlock_bh(&ifp
->lock
);
3892 addrconf_mod_dad_work(ifp
, 0);
3895 static void addrconf_dad_work(struct work_struct
*w
)
3897 struct inet6_ifaddr
*ifp
= container_of(to_delayed_work(w
),
3898 struct inet6_ifaddr
,
3900 struct inet6_dev
*idev
= ifp
->idev
;
3901 bool bump_id
, disable_ipv6
= false;
3902 struct in6_addr mcaddr
;
3908 } action
= DAD_PROCESS
;
3912 spin_lock_bh(&ifp
->lock
);
3913 if (ifp
->state
== INET6_IFADDR_STATE_PREDAD
) {
3915 ifp
->state
= INET6_IFADDR_STATE_DAD
;
3916 } else if (ifp
->state
== INET6_IFADDR_STATE_ERRDAD
) {
3918 ifp
->state
= INET6_IFADDR_STATE_POSTDAD
;
3920 if ((dev_net(idev
->dev
)->ipv6
.devconf_all
->accept_dad
> 1 ||
3921 idev
->cnf
.accept_dad
> 1) &&
3922 !idev
->cnf
.disable_ipv6
&&
3923 !(ifp
->flags
& IFA_F_STABLE_PRIVACY
)) {
3924 struct in6_addr addr
;
3926 addr
.s6_addr32
[0] = htonl(0xfe800000);
3927 addr
.s6_addr32
[1] = 0;
3929 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) &&
3930 ipv6_addr_equal(&ifp
->addr
, &addr
)) {
3931 /* DAD failed for link-local based on MAC */
3932 idev
->cnf
.disable_ipv6
= 1;
3934 pr_info("%s: IPv6 being disabled!\n",
3935 ifp
->idev
->dev
->name
);
3936 disable_ipv6
= true;
3940 spin_unlock_bh(&ifp
->lock
);
3942 if (action
== DAD_BEGIN
) {
3943 addrconf_dad_begin(ifp
);
3945 } else if (action
== DAD_ABORT
) {
3947 addrconf_dad_stop(ifp
, 1);
3949 addrconf_ifdown(idev
->dev
, 0);
3953 if (!ifp
->dad_probes
&& addrconf_dad_end(ifp
))
3956 write_lock_bh(&idev
->lock
);
3957 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
)) {
3958 write_unlock_bh(&idev
->lock
);
3962 spin_lock(&ifp
->lock
);
3963 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
) {
3964 spin_unlock(&ifp
->lock
);
3965 write_unlock_bh(&idev
->lock
);
3969 if (ifp
->dad_probes
== 0) {
3971 * DAD was successful
3974 bump_id
= ifp
->flags
& IFA_F_TENTATIVE
;
3975 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3976 spin_unlock(&ifp
->lock
);
3977 write_unlock_bh(&idev
->lock
);
3979 addrconf_dad_completed(ifp
, bump_id
);
3985 addrconf_mod_dad_work(ifp
,
3986 NEIGH_VAR(ifp
->idev
->nd_parms
, RETRANS_TIME
));
3987 spin_unlock(&ifp
->lock
);
3988 write_unlock_bh(&idev
->lock
);
3990 /* send a neighbour solicitation for our addr */
3991 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
3992 ndisc_send_ns(ifp
->idev
->dev
, &ifp
->addr
, &mcaddr
, &in6addr_any
,
3999 /* ifp->idev must be at least read locked */
4000 static bool ipv6_lonely_lladdr(struct inet6_ifaddr
*ifp
)
4002 struct inet6_ifaddr
*ifpiter
;
4003 struct inet6_dev
*idev
= ifp
->idev
;
4005 list_for_each_entry_reverse(ifpiter
, &idev
->addr_list
, if_list
) {
4006 if (ifpiter
->scope
> IFA_LINK
)
4008 if (ifp
!= ifpiter
&& ifpiter
->scope
== IFA_LINK
&&
4009 (ifpiter
->flags
& (IFA_F_PERMANENT
|IFA_F_TENTATIVE
|
4010 IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
)) ==
4017 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
, bool bump_id
)
4019 struct net_device
*dev
= ifp
->idev
->dev
;
4020 struct in6_addr lladdr
;
4021 bool send_rs
, send_mld
;
4023 addrconf_del_dad_work(ifp
);
4026 * Configure the address for reception. Now it is valid.
4029 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
4031 /* If added prefix is link local and we are prepared to process
4032 router advertisements, start sending router solicitations.
4035 read_lock_bh(&ifp
->idev
->lock
);
4036 send_mld
= ifp
->scope
== IFA_LINK
&& ipv6_lonely_lladdr(ifp
);
4037 send_rs
= send_mld
&&
4038 ipv6_accept_ra(ifp
->idev
) &&
4039 ifp
->idev
->cnf
.rtr_solicits
!= 0 &&
4040 (dev
->flags
&IFF_LOOPBACK
) == 0;
4041 read_unlock_bh(&ifp
->idev
->lock
);
4043 /* While dad is in progress mld report's source address is in6_addrany.
4044 * Resend with proper ll now.
4047 ipv6_mc_dad_complete(ifp
->idev
);
4051 * If a host as already performed a random delay
4052 * [...] as part of DAD [...] there is no need
4053 * to delay again before sending the first RS
4055 if (ipv6_get_lladdr(dev
, &lladdr
, IFA_F_TENTATIVE
))
4057 ndisc_send_rs(dev
, &lladdr
, &in6addr_linklocal_allrouters
);
4059 write_lock_bh(&ifp
->idev
->lock
);
4060 spin_lock(&ifp
->lock
);
4061 ifp
->idev
->rs_interval
= rfc3315_s14_backoff_init(
4062 ifp
->idev
->cnf
.rtr_solicit_interval
);
4063 ifp
->idev
->rs_probes
= 1;
4064 ifp
->idev
->if_flags
|= IF_RS_SENT
;
4065 addrconf_mod_rs_timer(ifp
->idev
, ifp
->idev
->rs_interval
);
4066 spin_unlock(&ifp
->lock
);
4067 write_unlock_bh(&ifp
->idev
->lock
);
4071 rt_genid_bump_ipv6(dev_net(dev
));
4073 /* Make sure that a new temporary address will be created
4074 * before this temporary address becomes deprecated.
4076 if (ifp
->flags
& IFA_F_TEMPORARY
)
4077 addrconf_verify_rtnl();
4080 static void addrconf_dad_run(struct inet6_dev
*idev
)
4082 struct inet6_ifaddr
*ifp
;
4084 read_lock_bh(&idev
->lock
);
4085 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
4086 spin_lock(&ifp
->lock
);
4087 if (ifp
->flags
& IFA_F_TENTATIVE
&&
4088 ifp
->state
== INET6_IFADDR_STATE_DAD
)
4089 addrconf_dad_kick(ifp
);
4090 spin_unlock(&ifp
->lock
);
4092 read_unlock_bh(&idev
->lock
);
4095 #ifdef CONFIG_PROC_FS
4096 struct if6_iter_state
{
4097 struct seq_net_private p
;
4102 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
, loff_t pos
)
4104 struct if6_iter_state
*state
= seq
->private;
4105 struct net
*net
= seq_file_net(seq
);
4106 struct inet6_ifaddr
*ifa
= NULL
;
4109 /* initial bucket if pos is 0 */
4115 for (; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
4116 hlist_for_each_entry_rcu(ifa
, &inet6_addr_lst
[state
->bucket
],
4118 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
4120 /* sync with offset */
4121 if (p
< state
->offset
) {
4129 /* prepare for next bucket */
4136 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
,
4137 struct inet6_ifaddr
*ifa
)
4139 struct if6_iter_state
*state
= seq
->private;
4140 struct net
*net
= seq_file_net(seq
);
4142 hlist_for_each_entry_continue_rcu(ifa
, addr_lst
) {
4143 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
4149 while (++state
->bucket
< IN6_ADDR_HSIZE
) {
4151 hlist_for_each_entry_rcu(ifa
,
4152 &inet6_addr_lst
[state
->bucket
], addr_lst
) {
4153 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
4163 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
4167 return if6_get_first(seq
, *pos
);
4170 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
4172 struct inet6_ifaddr
*ifa
;
4174 ifa
= if6_get_next(seq
, v
);
4179 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
4185 static int if6_seq_show(struct seq_file
*seq
, void *v
)
4187 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
4188 seq_printf(seq
, "%pi6 %02x %02x %02x %02x %8s\n",
4190 ifp
->idev
->dev
->ifindex
,
4194 ifp
->idev
->dev
->name
);
4198 static const struct seq_operations if6_seq_ops
= {
4199 .start
= if6_seq_start
,
4200 .next
= if6_seq_next
,
4201 .show
= if6_seq_show
,
4202 .stop
= if6_seq_stop
,
4205 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
4207 return seq_open_net(inode
, file
, &if6_seq_ops
,
4208 sizeof(struct if6_iter_state
));
4211 static const struct file_operations if6_fops
= {
4212 .owner
= THIS_MODULE
,
4213 .open
= if6_seq_open
,
4215 .llseek
= seq_lseek
,
4216 .release
= seq_release_net
,
4219 static int __net_init
if6_proc_net_init(struct net
*net
)
4221 if (!proc_create("if_inet6", S_IRUGO
, net
->proc_net
, &if6_fops
))
4226 static void __net_exit
if6_proc_net_exit(struct net
*net
)
4228 remove_proc_entry("if_inet6", net
->proc_net
);
4231 static struct pernet_operations if6_proc_net_ops
= {
4232 .init
= if6_proc_net_init
,
4233 .exit
= if6_proc_net_exit
,
4236 int __init
if6_proc_init(void)
4238 return register_pernet_subsys(&if6_proc_net_ops
);
4241 void if6_proc_exit(void)
4243 unregister_pernet_subsys(&if6_proc_net_ops
);
4245 #endif /* CONFIG_PROC_FS */
4247 #if IS_ENABLED(CONFIG_IPV6_MIP6)
4248 /* Check if address is a home address configured on any interface. */
4249 int ipv6_chk_home_addr(struct net
*net
, const struct in6_addr
*addr
)
4251 unsigned int hash
= inet6_addr_hash(net
, addr
);
4252 struct inet6_ifaddr
*ifp
= NULL
;
4256 hlist_for_each_entry_rcu(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
4257 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
4259 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
4260 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
4271 * Periodic address status verification
4274 static void addrconf_verify_rtnl(void)
4276 unsigned long now
, next
, next_sec
, next_sched
;
4277 struct inet6_ifaddr
*ifp
;
4284 next
= round_jiffies_up(now
+ ADDR_CHECK_FREQUENCY
);
4286 cancel_delayed_work(&addr_chk_work
);
4288 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
4290 hlist_for_each_entry_rcu_bh(ifp
, &inet6_addr_lst
[i
], addr_lst
) {
4293 /* When setting preferred_lft to a value not zero or
4294 * infinity, while valid_lft is infinity
4295 * IFA_F_PERMANENT has a non-infinity life time.
4297 if ((ifp
->flags
& IFA_F_PERMANENT
) &&
4298 (ifp
->prefered_lft
== INFINITY_LIFE_TIME
))
4301 spin_lock(&ifp
->lock
);
4302 /* We try to batch several events at once. */
4303 age
= (now
- ifp
->tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
4305 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
4306 age
>= ifp
->valid_lft
) {
4307 spin_unlock(&ifp
->lock
);
4311 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
4312 spin_unlock(&ifp
->lock
);
4314 } else if (age
>= ifp
->prefered_lft
) {
4315 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
4318 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
4320 ifp
->flags
|= IFA_F_DEPRECATED
;
4323 if ((ifp
->valid_lft
!= INFINITY_LIFE_TIME
) &&
4324 (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
)))
4325 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
4327 spin_unlock(&ifp
->lock
);
4332 ipv6_ifa_notify(0, ifp
);
4336 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
4337 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
4338 unsigned long regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
4339 ifp
->idev
->cnf
.dad_transmits
*
4340 NEIGH_VAR(ifp
->idev
->nd_parms
, RETRANS_TIME
) / HZ
;
4342 if (age
>= ifp
->prefered_lft
- regen_advance
) {
4343 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
4344 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
4345 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
4346 if (!ifp
->regen_count
&& ifpub
) {
4349 in6_ifa_hold(ifpub
);
4350 spin_unlock(&ifp
->lock
);
4352 spin_lock(&ifpub
->lock
);
4353 ifpub
->regen_count
= 0;
4354 spin_unlock(&ifpub
->lock
);
4355 ipv6_create_tempaddr(ifpub
, ifp
, true);
4360 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
4361 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
4362 spin_unlock(&ifp
->lock
);
4364 /* ifp->prefered_lft <= ifp->valid_lft */
4365 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
4366 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
4367 spin_unlock(&ifp
->lock
);
4372 next_sec
= round_jiffies_up(next
);
4375 /* If rounded timeout is accurate enough, accept it. */
4376 if (time_before(next_sec
, next
+ ADDRCONF_TIMER_FUZZ
))
4377 next_sched
= next_sec
;
4379 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
4380 if (time_before(next_sched
, jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
))
4381 next_sched
= jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
;
4383 ADBG(KERN_DEBUG
"now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
4384 now
, next
, next_sec
, next_sched
);
4385 mod_delayed_work(addrconf_wq
, &addr_chk_work
, next_sched
- now
);
4386 rcu_read_unlock_bh();
4389 static void addrconf_verify_work(struct work_struct
*w
)
4392 addrconf_verify_rtnl();
4396 static void addrconf_verify(void)
4398 mod_delayed_work(addrconf_wq
, &addr_chk_work
, 0);
4401 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
,
4402 struct in6_addr
**peer_pfx
)
4404 struct in6_addr
*pfx
= NULL
;
4409 pfx
= nla_data(addr
);
4412 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
4414 pfx
= nla_data(local
);
4420 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
4421 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
4422 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
4423 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
4424 [IFA_FLAGS
] = { .len
= sizeof(u32
) },
4428 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
4429 struct netlink_ext_ack
*extack
)
4431 struct net
*net
= sock_net(skb
->sk
);
4432 struct ifaddrmsg
*ifm
;
4433 struct nlattr
*tb
[IFA_MAX
+1];
4434 struct in6_addr
*pfx
, *peer_pfx
;
4438 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
,
4443 ifm
= nlmsg_data(nlh
);
4444 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer_pfx
);
4448 ifa_flags
= tb
[IFA_FLAGS
] ? nla_get_u32(tb
[IFA_FLAGS
]) : ifm
->ifa_flags
;
4450 /* We ignore other flags so far. */
4451 ifa_flags
&= IFA_F_MANAGETEMPADDR
;
4453 return inet6_addr_del(net
, ifm
->ifa_index
, ifa_flags
, pfx
,
4454 ifm
->ifa_prefixlen
);
4457 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u32 ifa_flags
,
4458 u32 prefered_lft
, u32 valid_lft
)
4462 unsigned long timeout
;
4463 bool was_managetempaddr
;
4464 bool had_prefixroute
;
4468 if (!valid_lft
|| (prefered_lft
> valid_lft
))
4471 if (ifa_flags
& IFA_F_MANAGETEMPADDR
&&
4472 (ifp
->flags
& IFA_F_TEMPORARY
|| ifp
->prefix_len
!= 64))
4475 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
4476 if (addrconf_finite_timeout(timeout
)) {
4477 expires
= jiffies_to_clock_t(timeout
* HZ
);
4478 valid_lft
= timeout
;
4479 flags
= RTF_EXPIRES
;
4483 ifa_flags
|= IFA_F_PERMANENT
;
4486 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
4487 if (addrconf_finite_timeout(timeout
)) {
4489 ifa_flags
|= IFA_F_DEPRECATED
;
4490 prefered_lft
= timeout
;
4493 spin_lock_bh(&ifp
->lock
);
4494 was_managetempaddr
= ifp
->flags
& IFA_F_MANAGETEMPADDR
;
4495 had_prefixroute
= ifp
->flags
& IFA_F_PERMANENT
&&
4496 !(ifp
->flags
& IFA_F_NOPREFIXROUTE
);
4497 ifp
->flags
&= ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
|
4498 IFA_F_HOMEADDRESS
| IFA_F_MANAGETEMPADDR
|
4499 IFA_F_NOPREFIXROUTE
);
4500 ifp
->flags
|= ifa_flags
;
4501 ifp
->tstamp
= jiffies
;
4502 ifp
->valid_lft
= valid_lft
;
4503 ifp
->prefered_lft
= prefered_lft
;
4505 spin_unlock_bh(&ifp
->lock
);
4506 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
4507 ipv6_ifa_notify(0, ifp
);
4509 if (!(ifa_flags
& IFA_F_NOPREFIXROUTE
)) {
4510 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
4512 } else if (had_prefixroute
) {
4513 enum cleanup_prefix_rt_t action
;
4514 unsigned long rt_expires
;
4516 write_lock_bh(&ifp
->idev
->lock
);
4517 action
= check_cleanup_prefix_route(ifp
, &rt_expires
);
4518 write_unlock_bh(&ifp
->idev
->lock
);
4520 if (action
!= CLEANUP_PREFIX_RT_NOP
) {
4521 cleanup_prefix_route(ifp
, rt_expires
,
4522 action
== CLEANUP_PREFIX_RT_DEL
);
4526 if (was_managetempaddr
|| ifp
->flags
& IFA_F_MANAGETEMPADDR
) {
4527 if (was_managetempaddr
&& !(ifp
->flags
& IFA_F_MANAGETEMPADDR
))
4528 valid_lft
= prefered_lft
= 0;
4529 manage_tempaddrs(ifp
->idev
, ifp
, valid_lft
, prefered_lft
,
4530 !was_managetempaddr
, jiffies
);
4533 addrconf_verify_rtnl();
4539 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
4540 struct netlink_ext_ack
*extack
)
4542 struct net
*net
= sock_net(skb
->sk
);
4543 struct ifaddrmsg
*ifm
;
4544 struct nlattr
*tb
[IFA_MAX
+1];
4545 struct in6_addr
*pfx
, *peer_pfx
;
4546 struct inet6_ifaddr
*ifa
;
4547 struct net_device
*dev
;
4548 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
4552 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
,
4557 ifm
= nlmsg_data(nlh
);
4558 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer_pfx
);
4562 if (tb
[IFA_CACHEINFO
]) {
4563 struct ifa_cacheinfo
*ci
;
4565 ci
= nla_data(tb
[IFA_CACHEINFO
]);
4566 valid_lft
= ci
->ifa_valid
;
4567 preferred_lft
= ci
->ifa_prefered
;
4569 preferred_lft
= INFINITY_LIFE_TIME
;
4570 valid_lft
= INFINITY_LIFE_TIME
;
4573 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
4577 ifa_flags
= tb
[IFA_FLAGS
] ? nla_get_u32(tb
[IFA_FLAGS
]) : ifm
->ifa_flags
;
4579 /* We ignore other flags so far. */
4580 ifa_flags
&= IFA_F_NODAD
| IFA_F_HOMEADDRESS
| IFA_F_MANAGETEMPADDR
|
4581 IFA_F_NOPREFIXROUTE
| IFA_F_MCAUTOJOIN
;
4583 ifa
= ipv6_get_ifaddr(net
, pfx
, dev
, 1);
4586 * It would be best to check for !NLM_F_CREATE here but
4587 * userspace already relies on not having to provide this.
4589 return inet6_addr_add(net
, ifm
->ifa_index
, pfx
, peer_pfx
,
4590 ifm
->ifa_prefixlen
, ifa_flags
,
4591 preferred_lft
, valid_lft
, extack
);
4594 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
4595 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
4598 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
4605 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u32 flags
,
4606 u8 scope
, int ifindex
)
4608 struct ifaddrmsg
*ifm
;
4610 ifm
= nlmsg_data(nlh
);
4611 ifm
->ifa_family
= AF_INET6
;
4612 ifm
->ifa_prefixlen
= prefixlen
;
4613 ifm
->ifa_flags
= flags
;
4614 ifm
->ifa_scope
= scope
;
4615 ifm
->ifa_index
= ifindex
;
4618 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
4619 unsigned long tstamp
, u32 preferred
, u32 valid
)
4621 struct ifa_cacheinfo ci
;
4623 ci
.cstamp
= cstamp_delta(cstamp
);
4624 ci
.tstamp
= cstamp_delta(tstamp
);
4625 ci
.ifa_prefered
= preferred
;
4626 ci
.ifa_valid
= valid
;
4628 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
4631 static inline int rt_scope(int ifa_scope
)
4633 if (ifa_scope
& IFA_HOST
)
4634 return RT_SCOPE_HOST
;
4635 else if (ifa_scope
& IFA_LINK
)
4636 return RT_SCOPE_LINK
;
4637 else if (ifa_scope
& IFA_SITE
)
4638 return RT_SCOPE_SITE
;
4640 return RT_SCOPE_UNIVERSE
;
4643 static inline int inet6_ifaddr_msgsize(void)
4645 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
4646 + nla_total_size(16) /* IFA_LOCAL */
4647 + nla_total_size(16) /* IFA_ADDRESS */
4648 + nla_total_size(sizeof(struct ifa_cacheinfo
))
4649 + nla_total_size(4) /* IFA_FLAGS */;
4652 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
4653 u32 portid
, u32 seq
, int event
, unsigned int flags
)
4655 struct nlmsghdr
*nlh
;
4656 u32 preferred
, valid
;
4658 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
4662 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
4663 ifa
->idev
->dev
->ifindex
);
4665 if (!((ifa
->flags
&IFA_F_PERMANENT
) &&
4666 (ifa
->prefered_lft
== INFINITY_LIFE_TIME
))) {
4667 preferred
= ifa
->prefered_lft
;
4668 valid
= ifa
->valid_lft
;
4669 if (preferred
!= INFINITY_LIFE_TIME
) {
4670 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
4671 if (preferred
> tval
)
4675 if (valid
!= INFINITY_LIFE_TIME
) {
4683 preferred
= INFINITY_LIFE_TIME
;
4684 valid
= INFINITY_LIFE_TIME
;
4687 if (!ipv6_addr_any(&ifa
->peer_addr
)) {
4688 if (nla_put_in6_addr(skb
, IFA_LOCAL
, &ifa
->addr
) < 0 ||
4689 nla_put_in6_addr(skb
, IFA_ADDRESS
, &ifa
->peer_addr
) < 0)
4692 if (nla_put_in6_addr(skb
, IFA_ADDRESS
, &ifa
->addr
) < 0)
4695 if (put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0)
4698 if (nla_put_u32(skb
, IFA_FLAGS
, ifa
->flags
) < 0)
4701 nlmsg_end(skb
, nlh
);
4705 nlmsg_cancel(skb
, nlh
);
4709 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
4710 u32 portid
, u32 seq
, int event
, u16 flags
)
4712 struct nlmsghdr
*nlh
;
4713 u8 scope
= RT_SCOPE_UNIVERSE
;
4714 int ifindex
= ifmca
->idev
->dev
->ifindex
;
4716 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
4717 scope
= RT_SCOPE_SITE
;
4719 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
4723 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
4724 if (nla_put_in6_addr(skb
, IFA_MULTICAST
, &ifmca
->mca_addr
) < 0 ||
4725 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
4726 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
4727 nlmsg_cancel(skb
, nlh
);
4731 nlmsg_end(skb
, nlh
);
4735 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
4736 u32 portid
, u32 seq
, int event
, unsigned int flags
)
4738 struct nlmsghdr
*nlh
;
4739 u8 scope
= RT_SCOPE_UNIVERSE
;
4740 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
4742 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
4743 scope
= RT_SCOPE_SITE
;
4745 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
4749 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
4750 if (nla_put_in6_addr(skb
, IFA_ANYCAST
, &ifaca
->aca_addr
) < 0 ||
4751 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
4752 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
4753 nlmsg_cancel(skb
, nlh
);
4757 nlmsg_end(skb
, nlh
);
4767 /* called with rcu_read_lock() */
4768 static int in6_dump_addrs(struct inet6_dev
*idev
, struct sk_buff
*skb
,
4769 struct netlink_callback
*cb
, enum addr_type_t type
,
4770 int s_ip_idx
, int *p_ip_idx
)
4772 struct ifmcaddr6
*ifmca
;
4773 struct ifacaddr6
*ifaca
;
4775 int ip_idx
= *p_ip_idx
;
4777 read_lock_bh(&idev
->lock
);
4779 case UNICAST_ADDR
: {
4780 struct inet6_ifaddr
*ifa
;
4782 /* unicast address incl. temp addr */
4783 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
4784 if (++ip_idx
< s_ip_idx
)
4786 err
= inet6_fill_ifaddr(skb
, ifa
,
4787 NETLINK_CB(cb
->skb
).portid
,
4793 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
4797 case MULTICAST_ADDR
:
4798 /* multicast address */
4799 for (ifmca
= idev
->mc_list
; ifmca
;
4800 ifmca
= ifmca
->next
, ip_idx
++) {
4801 if (ip_idx
< s_ip_idx
)
4803 err
= inet6_fill_ifmcaddr(skb
, ifmca
,
4804 NETLINK_CB(cb
->skb
).portid
,
4813 /* anycast address */
4814 for (ifaca
= idev
->ac_list
; ifaca
;
4815 ifaca
= ifaca
->aca_next
, ip_idx
++) {
4816 if (ip_idx
< s_ip_idx
)
4818 err
= inet6_fill_ifacaddr(skb
, ifaca
,
4819 NETLINK_CB(cb
->skb
).portid
,
4830 read_unlock_bh(&idev
->lock
);
4835 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
4836 enum addr_type_t type
)
4838 struct net
*net
= sock_net(skb
->sk
);
4841 int s_idx
, s_ip_idx
;
4842 struct net_device
*dev
;
4843 struct inet6_dev
*idev
;
4844 struct hlist_head
*head
;
4847 s_idx
= idx
= cb
->args
[1];
4848 s_ip_idx
= ip_idx
= cb
->args
[2];
4851 cb
->seq
= atomic_read(&net
->ipv6
.dev_addr_genid
) ^ net
->dev_base_seq
;
4852 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
4854 head
= &net
->dev_index_head
[h
];
4855 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
4858 if (h
> s_h
|| idx
> s_idx
)
4861 idev
= __in6_dev_get(dev
);
4865 if (in6_dump_addrs(idev
, skb
, cb
, type
,
4866 s_ip_idx
, &ip_idx
) < 0)
4876 cb
->args
[2] = ip_idx
;
4881 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4883 enum addr_type_t type
= UNICAST_ADDR
;
4885 return inet6_dump_addr(skb
, cb
, type
);
4888 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4890 enum addr_type_t type
= MULTICAST_ADDR
;
4892 return inet6_dump_addr(skb
, cb
, type
);
4896 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4898 enum addr_type_t type
= ANYCAST_ADDR
;
4900 return inet6_dump_addr(skb
, cb
, type
);
4903 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
*nlh
,
4904 struct netlink_ext_ack
*extack
)
4906 struct net
*net
= sock_net(in_skb
->sk
);
4907 struct ifaddrmsg
*ifm
;
4908 struct nlattr
*tb
[IFA_MAX
+1];
4909 struct in6_addr
*addr
= NULL
, *peer
;
4910 struct net_device
*dev
= NULL
;
4911 struct inet6_ifaddr
*ifa
;
4912 struct sk_buff
*skb
;
4915 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
,
4920 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer
);
4924 ifm
= nlmsg_data(nlh
);
4926 dev
= dev_get_by_index(net
, ifm
->ifa_index
);
4928 ifa
= ipv6_get_ifaddr(net
, addr
, dev
, 1);
4930 err
= -EADDRNOTAVAIL
;
4934 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
);
4940 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).portid
,
4941 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
4943 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4944 WARN_ON(err
== -EMSGSIZE
);
4948 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).portid
);
4957 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
4959 struct sk_buff
*skb
;
4960 struct net
*net
= dev_net(ifa
->idev
->dev
);
4963 /* Don't send DELADDR notification for TENTATIVE address,
4964 * since NEWADDR notification is sent only after removing
4965 * TENTATIVE flag, if DAD has not failed.
4967 if (ifa
->flags
& IFA_F_TENTATIVE
&& !(ifa
->flags
& IFA_F_DADFAILED
) &&
4968 event
== RTM_DELADDR
)
4971 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
4975 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
4977 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4978 WARN_ON(err
== -EMSGSIZE
);
4982 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
4986 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
4989 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
4990 __s32
*array
, int bytes
)
4992 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
4994 memset(array
, 0, bytes
);
4995 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
4996 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
4997 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
4998 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
4999 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
5000 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
5001 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
5002 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
5003 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] =
5004 jiffies_to_msecs(cnf
->rtr_solicit_interval
);
5005 array
[DEVCONF_RTR_SOLICIT_MAX_INTERVAL
] =
5006 jiffies_to_msecs(cnf
->rtr_solicit_max_interval
);
5007 array
[DEVCONF_RTR_SOLICIT_DELAY
] =
5008 jiffies_to_msecs(cnf
->rtr_solicit_delay
);
5009 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
5010 array
[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL
] =
5011 jiffies_to_msecs(cnf
->mldv1_unsolicited_report_interval
);
5012 array
[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL
] =
5013 jiffies_to_msecs(cnf
->mldv2_unsolicited_report_interval
);
5014 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
5015 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
5016 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
5017 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
5018 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
5019 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
5020 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
5021 array
[DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT
] = cnf
->accept_ra_min_hop_limit
;
5022 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
5023 #ifdef CONFIG_IPV6_ROUTER_PREF
5024 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
5025 array
[DEVCONF_RTR_PROBE_INTERVAL
] =
5026 jiffies_to_msecs(cnf
->rtr_probe_interval
);
5027 #ifdef CONFIG_IPV6_ROUTE_INFO
5028 array
[DEVCONF_ACCEPT_RA_RT_INFO_MIN_PLEN
] = cnf
->accept_ra_rt_info_min_plen
;
5029 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
5032 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
5033 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
5034 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
5035 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
5036 array
[DEVCONF_USE_OPTIMISTIC
] = cnf
->use_optimistic
;
5038 #ifdef CONFIG_IPV6_MROUTE
5039 array
[DEVCONF_MC_FORWARDING
] = cnf
->mc_forwarding
;
5041 array
[DEVCONF_DISABLE_IPV6
] = cnf
->disable_ipv6
;
5042 array
[DEVCONF_ACCEPT_DAD
] = cnf
->accept_dad
;
5043 array
[DEVCONF_FORCE_TLLAO
] = cnf
->force_tllao
;
5044 array
[DEVCONF_NDISC_NOTIFY
] = cnf
->ndisc_notify
;
5045 array
[DEVCONF_SUPPRESS_FRAG_NDISC
] = cnf
->suppress_frag_ndisc
;
5046 array
[DEVCONF_ACCEPT_RA_FROM_LOCAL
] = cnf
->accept_ra_from_local
;
5047 array
[DEVCONF_ACCEPT_RA_MTU
] = cnf
->accept_ra_mtu
;
5048 array
[DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN
] = cnf
->ignore_routes_with_linkdown
;
5049 /* we omit DEVCONF_STABLE_SECRET for now */
5050 array
[DEVCONF_USE_OIF_ADDRS_ONLY
] = cnf
->use_oif_addrs_only
;
5051 array
[DEVCONF_DROP_UNICAST_IN_L2_MULTICAST
] = cnf
->drop_unicast_in_l2_multicast
;
5052 array
[DEVCONF_DROP_UNSOLICITED_NA
] = cnf
->drop_unsolicited_na
;
5053 array
[DEVCONF_KEEP_ADDR_ON_DOWN
] = cnf
->keep_addr_on_down
;
5054 array
[DEVCONF_SEG6_ENABLED
] = cnf
->seg6_enabled
;
5055 #ifdef CONFIG_IPV6_SEG6_HMAC
5056 array
[DEVCONF_SEG6_REQUIRE_HMAC
] = cnf
->seg6_require_hmac
;
5058 array
[DEVCONF_ENHANCED_DAD
] = cnf
->enhanced_dad
;
5059 array
[DEVCONF_ADDR_GEN_MODE
] = cnf
->addr_gen_mode
;
5060 array
[DEVCONF_DISABLE_POLICY
] = cnf
->disable_policy
;
5061 array
[DEVCONF_NDISC_TCLASS
] = cnf
->ndisc_tclass
;
5064 static inline size_t inet6_ifla6_size(void)
5066 return nla_total_size(4) /* IFLA_INET6_FLAGS */
5067 + nla_total_size(sizeof(struct ifla_cacheinfo
))
5068 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
5069 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
5070 + nla_total_size(ICMP6_MIB_MAX
* 8) /* IFLA_INET6_ICMP6STATS */
5071 + nla_total_size(sizeof(struct in6_addr
)); /* IFLA_INET6_TOKEN */
5074 static inline size_t inet6_if_nlmsg_size(void)
5076 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
5077 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
5078 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
5079 + nla_total_size(4) /* IFLA_MTU */
5080 + nla_total_size(4) /* IFLA_LINK */
5081 + nla_total_size(1) /* IFLA_OPERSTATE */
5082 + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
5085 static inline void __snmp6_fill_statsdev(u64
*stats
, atomic_long_t
*mib
,
5089 int pad
= bytes
- sizeof(u64
) * ICMP6_MIB_MAX
;
5092 /* Use put_unaligned() because stats may not be aligned for u64. */
5093 put_unaligned(ICMP6_MIB_MAX
, &stats
[0]);
5094 for (i
= 1; i
< ICMP6_MIB_MAX
; i
++)
5095 put_unaligned(atomic_long_read(&mib
[i
]), &stats
[i
]);
5097 memset(&stats
[ICMP6_MIB_MAX
], 0, pad
);
5100 static inline void __snmp6_fill_stats64(u64
*stats
, void __percpu
*mib
,
5101 int bytes
, size_t syncpoff
)
5104 u64 buff
[IPSTATS_MIB_MAX
];
5105 int pad
= bytes
- sizeof(u64
) * IPSTATS_MIB_MAX
;
5109 memset(buff
, 0, sizeof(buff
));
5110 buff
[0] = IPSTATS_MIB_MAX
;
5112 for_each_possible_cpu(c
) {
5113 for (i
= 1; i
< IPSTATS_MIB_MAX
; i
++)
5114 buff
[i
] += snmp_get_cpu_field64(mib
, c
, i
, syncpoff
);
5117 memcpy(stats
, buff
, IPSTATS_MIB_MAX
* sizeof(u64
));
5118 memset(&stats
[IPSTATS_MIB_MAX
], 0, pad
);
5121 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
5125 case IFLA_INET6_STATS
:
5126 __snmp6_fill_stats64(stats
, idev
->stats
.ipv6
, bytes
,
5127 offsetof(struct ipstats_mib
, syncp
));
5129 case IFLA_INET6_ICMP6STATS
:
5130 __snmp6_fill_statsdev(stats
, idev
->stats
.icmpv6dev
->mibs
, bytes
);
5135 static int inet6_fill_ifla6_attrs(struct sk_buff
*skb
, struct inet6_dev
*idev
,
5136 u32 ext_filter_mask
)
5139 struct ifla_cacheinfo ci
;
5141 if (nla_put_u32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
))
5142 goto nla_put_failure
;
5143 ci
.max_reasm_len
= IPV6_MAXPLEN
;
5144 ci
.tstamp
= cstamp_delta(idev
->tstamp
);
5145 ci
.reachable_time
= jiffies_to_msecs(idev
->nd_parms
->reachable_time
);
5146 ci
.retrans_time
= jiffies_to_msecs(NEIGH_VAR(idev
->nd_parms
, RETRANS_TIME
));
5147 if (nla_put(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
))
5148 goto nla_put_failure
;
5149 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
5151 goto nla_put_failure
;
5152 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
5154 /* XXX - MC not implemented */
5156 if (ext_filter_mask
& RTEXT_FILTER_SKIP_STATS
)
5159 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
5161 goto nla_put_failure
;
5162 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
5164 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
5166 goto nla_put_failure
;
5167 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
5169 nla
= nla_reserve(skb
, IFLA_INET6_TOKEN
, sizeof(struct in6_addr
));
5171 goto nla_put_failure
;
5173 if (nla_put_u8(skb
, IFLA_INET6_ADDR_GEN_MODE
, idev
->cnf
.addr_gen_mode
))
5174 goto nla_put_failure
;
5176 read_lock_bh(&idev
->lock
);
5177 memcpy(nla_data(nla
), idev
->token
.s6_addr
, nla_len(nla
));
5178 read_unlock_bh(&idev
->lock
);
5186 static size_t inet6_get_link_af_size(const struct net_device
*dev
,
5187 u32 ext_filter_mask
)
5189 if (!__in6_dev_get(dev
))
5192 return inet6_ifla6_size();
5195 static int inet6_fill_link_af(struct sk_buff
*skb
, const struct net_device
*dev
,
5196 u32 ext_filter_mask
)
5198 struct inet6_dev
*idev
= __in6_dev_get(dev
);
5203 if (inet6_fill_ifla6_attrs(skb
, idev
, ext_filter_mask
) < 0)
5209 static int inet6_set_iftoken(struct inet6_dev
*idev
, struct in6_addr
*token
)
5211 struct inet6_ifaddr
*ifp
;
5212 struct net_device
*dev
= idev
->dev
;
5213 bool clear_token
, update_rs
= false;
5214 struct in6_addr ll_addr
;
5220 if (dev
->flags
& (IFF_LOOPBACK
| IFF_NOARP
))
5222 if (!ipv6_accept_ra(idev
))
5224 if (idev
->cnf
.rtr_solicits
== 0)
5227 write_lock_bh(&idev
->lock
);
5229 BUILD_BUG_ON(sizeof(token
->s6_addr
) != 16);
5230 memcpy(idev
->token
.s6_addr
+ 8, token
->s6_addr
+ 8, 8);
5232 write_unlock_bh(&idev
->lock
);
5234 clear_token
= ipv6_addr_any(token
);
5238 if (!idev
->dead
&& (idev
->if_flags
& IF_READY
) &&
5239 !ipv6_get_lladdr(dev
, &ll_addr
, IFA_F_TENTATIVE
|
5240 IFA_F_OPTIMISTIC
)) {
5241 /* If we're not ready, then normal ifup will take care
5242 * of this. Otherwise, we need to request our rs here.
5244 ndisc_send_rs(dev
, &ll_addr
, &in6addr_linklocal_allrouters
);
5249 write_lock_bh(&idev
->lock
);
5252 idev
->if_flags
|= IF_RS_SENT
;
5253 idev
->rs_interval
= rfc3315_s14_backoff_init(
5254 idev
->cnf
.rtr_solicit_interval
);
5255 idev
->rs_probes
= 1;
5256 addrconf_mod_rs_timer(idev
, idev
->rs_interval
);
5259 /* Well, that's kinda nasty ... */
5260 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
5261 spin_lock(&ifp
->lock
);
5262 if (ifp
->tokenized
) {
5264 ifp
->prefered_lft
= 0;
5266 spin_unlock(&ifp
->lock
);
5269 write_unlock_bh(&idev
->lock
);
5270 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
5271 addrconf_verify_rtnl();
5275 static const struct nla_policy inet6_af_policy
[IFLA_INET6_MAX
+ 1] = {
5276 [IFLA_INET6_ADDR_GEN_MODE
] = { .type
= NLA_U8
},
5277 [IFLA_INET6_TOKEN
] = { .len
= sizeof(struct in6_addr
) },
5280 static int inet6_validate_link_af(const struct net_device
*dev
,
5281 const struct nlattr
*nla
)
5283 struct nlattr
*tb
[IFLA_INET6_MAX
+ 1];
5285 if (dev
&& !__in6_dev_get(dev
))
5286 return -EAFNOSUPPORT
;
5288 return nla_parse_nested(tb
, IFLA_INET6_MAX
, nla
, inet6_af_policy
,
5292 static int check_addr_gen_mode(int mode
)
5294 if (mode
!= IN6_ADDR_GEN_MODE_EUI64
&&
5295 mode
!= IN6_ADDR_GEN_MODE_NONE
&&
5296 mode
!= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
&&
5297 mode
!= IN6_ADDR_GEN_MODE_RANDOM
)
5302 static int check_stable_privacy(struct inet6_dev
*idev
, struct net
*net
,
5305 if (mode
== IN6_ADDR_GEN_MODE_STABLE_PRIVACY
&&
5306 !idev
->cnf
.stable_secret
.initialized
&&
5307 !net
->ipv6
.devconf_dflt
->stable_secret
.initialized
)
5312 static int inet6_set_link_af(struct net_device
*dev
, const struct nlattr
*nla
)
5315 struct inet6_dev
*idev
= __in6_dev_get(dev
);
5316 struct nlattr
*tb
[IFLA_INET6_MAX
+ 1];
5319 return -EAFNOSUPPORT
;
5321 if (nla_parse_nested(tb
, IFLA_INET6_MAX
, nla
, NULL
, NULL
) < 0)
5324 if (tb
[IFLA_INET6_TOKEN
]) {
5325 err
= inet6_set_iftoken(idev
, nla_data(tb
[IFLA_INET6_TOKEN
]));
5330 if (tb
[IFLA_INET6_ADDR_GEN_MODE
]) {
5331 u8 mode
= nla_get_u8(tb
[IFLA_INET6_ADDR_GEN_MODE
]);
5333 if (check_addr_gen_mode(mode
) < 0 ||
5334 check_stable_privacy(idev
, dev_net(dev
), mode
) < 0)
5337 idev
->cnf
.addr_gen_mode
= mode
;
5344 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
5345 u32 portid
, u32 seq
, int event
, unsigned int flags
)
5347 struct net_device
*dev
= idev
->dev
;
5348 struct ifinfomsg
*hdr
;
5349 struct nlmsghdr
*nlh
;
5352 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*hdr
), flags
);
5356 hdr
= nlmsg_data(nlh
);
5357 hdr
->ifi_family
= AF_INET6
;
5359 hdr
->ifi_type
= dev
->type
;
5360 hdr
->ifi_index
= dev
->ifindex
;
5361 hdr
->ifi_flags
= dev_get_flags(dev
);
5362 hdr
->ifi_change
= 0;
5364 if (nla_put_string(skb
, IFLA_IFNAME
, dev
->name
) ||
5366 nla_put(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
)) ||
5367 nla_put_u32(skb
, IFLA_MTU
, dev
->mtu
) ||
5368 (dev
->ifindex
!= dev_get_iflink(dev
) &&
5369 nla_put_u32(skb
, IFLA_LINK
, dev_get_iflink(dev
))) ||
5370 nla_put_u8(skb
, IFLA_OPERSTATE
,
5371 netif_running(dev
) ? dev
->operstate
: IF_OPER_DOWN
))
5372 goto nla_put_failure
;
5373 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
5375 goto nla_put_failure
;
5377 if (inet6_fill_ifla6_attrs(skb
, idev
, 0) < 0)
5378 goto nla_put_failure
;
5380 nla_nest_end(skb
, protoinfo
);
5381 nlmsg_end(skb
, nlh
);
5385 nlmsg_cancel(skb
, nlh
);
5389 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
5391 struct net
*net
= sock_net(skb
->sk
);
5394 struct net_device
*dev
;
5395 struct inet6_dev
*idev
;
5396 struct hlist_head
*head
;
5399 s_idx
= cb
->args
[1];
5402 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
5404 head
= &net
->dev_index_head
[h
];
5405 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
5408 idev
= __in6_dev_get(dev
);
5411 if (inet6_fill_ifinfo(skb
, idev
,
5412 NETLINK_CB(cb
->skb
).portid
,
5414 RTM_NEWLINK
, NLM_F_MULTI
) < 0)
5428 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
5430 struct sk_buff
*skb
;
5431 struct net
*net
= dev_net(idev
->dev
);
5434 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
5438 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
5440 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
5441 WARN_ON(err
== -EMSGSIZE
);
5445 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFINFO
, NULL
, GFP_ATOMIC
);
5449 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFINFO
, err
);
5452 static inline size_t inet6_prefix_nlmsg_size(void)
5454 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
5455 + nla_total_size(sizeof(struct in6_addr
))
5456 + nla_total_size(sizeof(struct prefix_cacheinfo
));
5459 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
5460 struct prefix_info
*pinfo
, u32 portid
, u32 seq
,
5461 int event
, unsigned int flags
)
5463 struct prefixmsg
*pmsg
;
5464 struct nlmsghdr
*nlh
;
5465 struct prefix_cacheinfo ci
;
5467 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*pmsg
), flags
);
5471 pmsg
= nlmsg_data(nlh
);
5472 pmsg
->prefix_family
= AF_INET6
;
5473 pmsg
->prefix_pad1
= 0;
5474 pmsg
->prefix_pad2
= 0;
5475 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
5476 pmsg
->prefix_len
= pinfo
->prefix_len
;
5477 pmsg
->prefix_type
= pinfo
->type
;
5478 pmsg
->prefix_pad3
= 0;
5479 pmsg
->prefix_flags
= 0;
5481 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
5482 if (pinfo
->autoconf
)
5483 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
5485 if (nla_put(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
))
5486 goto nla_put_failure
;
5487 ci
.preferred_time
= ntohl(pinfo
->prefered
);
5488 ci
.valid_time
= ntohl(pinfo
->valid
);
5489 if (nla_put(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
))
5490 goto nla_put_failure
;
5491 nlmsg_end(skb
, nlh
);
5495 nlmsg_cancel(skb
, nlh
);
5499 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
5500 struct prefix_info
*pinfo
)
5502 struct sk_buff
*skb
;
5503 struct net
*net
= dev_net(idev
->dev
);
5506 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
5510 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
5512 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
5513 WARN_ON(err
== -EMSGSIZE
);
5517 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
5521 rtnl_set_sk_err(net
, RTNLGRP_IPV6_PREFIX
, err
);
5524 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
5526 struct net
*net
= dev_net(ifp
->idev
->dev
);
5531 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
5536 * If the address was optimistic
5537 * we inserted the route at the start of
5538 * our DAD process, so we don't need
5541 if (!rcu_access_pointer(ifp
->rt
->rt6i_node
))
5542 ip6_ins_rt(ifp
->rt
);
5543 if (ifp
->idev
->cnf
.forwarding
)
5544 addrconf_join_anycast(ifp
);
5545 if (!ipv6_addr_any(&ifp
->peer_addr
))
5546 addrconf_prefix_route(&ifp
->peer_addr
, 128,
5547 ifp
->idev
->dev
, 0, 0);
5550 if (ifp
->idev
->cnf
.forwarding
)
5551 addrconf_leave_anycast(ifp
);
5552 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
5553 if (!ipv6_addr_any(&ifp
->peer_addr
)) {
5554 struct rt6_info
*rt
;
5556 rt
= addrconf_get_prefix_route(&ifp
->peer_addr
, 128,
5557 ifp
->idev
->dev
, 0, 0);
5562 if (dst_hold_safe(&ifp
->rt
->dst
))
5563 ip6_del_rt(ifp
->rt
);
5565 rt_genid_bump_ipv6(net
);
5568 atomic_inc(&net
->ipv6
.dev_addr_genid
);
5571 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
5574 if (likely(ifp
->idev
->dead
== 0))
5575 __ipv6_ifa_notify(event
, ifp
);
5576 rcu_read_unlock_bh();
5579 #ifdef CONFIG_SYSCTL
5582 int addrconf_sysctl_forward(struct ctl_table
*ctl
, int write
,
5583 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
5585 int *valp
= ctl
->data
;
5588 struct ctl_table lctl
;
5592 * ctl->data points to idev->cnf.forwarding, we should
5593 * not modify it until we get the rtnl lock.
5598 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
5601 ret
= addrconf_fixup_forwarding(ctl
, valp
, val
);
5608 int addrconf_sysctl_mtu(struct ctl_table
*ctl
, int write
,
5609 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
5611 struct inet6_dev
*idev
= ctl
->extra1
;
5612 int min_mtu
= IPV6_MIN_MTU
;
5613 struct ctl_table lctl
;
5616 lctl
.extra1
= &min_mtu
;
5617 lctl
.extra2
= idev
? &idev
->dev
->mtu
: NULL
;
5619 return proc_dointvec_minmax(&lctl
, write
, buffer
, lenp
, ppos
);
5622 static void dev_disable_change(struct inet6_dev
*idev
)
5624 struct netdev_notifier_info info
;
5626 if (!idev
|| !idev
->dev
)
5629 netdev_notifier_info_init(&info
, idev
->dev
);
5630 if (idev
->cnf
.disable_ipv6
)
5631 addrconf_notify(NULL
, NETDEV_DOWN
, &info
);
5633 addrconf_notify(NULL
, NETDEV_UP
, &info
);
5636 static void addrconf_disable_change(struct net
*net
, __s32 newf
)
5638 struct net_device
*dev
;
5639 struct inet6_dev
*idev
;
5641 for_each_netdev(net
, dev
) {
5642 idev
= __in6_dev_get(dev
);
5644 int changed
= (!idev
->cnf
.disable_ipv6
) ^ (!newf
);
5645 idev
->cnf
.disable_ipv6
= newf
;
5647 dev_disable_change(idev
);
5652 static int addrconf_disable_ipv6(struct ctl_table
*table
, int *p
, int newf
)
5657 if (!rtnl_trylock())
5658 return restart_syscall();
5660 net
= (struct net
*)table
->extra2
;
5664 if (p
== &net
->ipv6
.devconf_dflt
->disable_ipv6
) {
5669 if (p
== &net
->ipv6
.devconf_all
->disable_ipv6
) {
5670 net
->ipv6
.devconf_dflt
->disable_ipv6
= newf
;
5671 addrconf_disable_change(net
, newf
);
5672 } else if ((!newf
) ^ (!old
))
5673 dev_disable_change((struct inet6_dev
*)table
->extra1
);
5680 int addrconf_sysctl_disable(struct ctl_table
*ctl
, int write
,
5681 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
5683 int *valp
= ctl
->data
;
5686 struct ctl_table lctl
;
5690 * ctl->data points to idev->cnf.disable_ipv6, we should
5691 * not modify it until we get the rtnl lock.
5696 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
5699 ret
= addrconf_disable_ipv6(ctl
, valp
, val
);
5706 int addrconf_sysctl_proxy_ndp(struct ctl_table
*ctl
, int write
,
5707 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
5709 int *valp
= ctl
->data
;
5714 ret
= proc_dointvec(ctl
, write
, buffer
, lenp
, ppos
);
5717 if (write
&& old
!= new) {
5718 struct net
*net
= ctl
->extra2
;
5720 if (!rtnl_trylock())
5721 return restart_syscall();
5723 if (valp
== &net
->ipv6
.devconf_dflt
->proxy_ndp
)
5724 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
5725 NETCONFA_PROXY_NEIGH
,
5726 NETCONFA_IFINDEX_DEFAULT
,
5727 net
->ipv6
.devconf_dflt
);
5728 else if (valp
== &net
->ipv6
.devconf_all
->proxy_ndp
)
5729 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
5730 NETCONFA_PROXY_NEIGH
,
5731 NETCONFA_IFINDEX_ALL
,
5732 net
->ipv6
.devconf_all
);
5734 struct inet6_dev
*idev
= ctl
->extra1
;
5736 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
5737 NETCONFA_PROXY_NEIGH
,
5747 static int addrconf_sysctl_addr_gen_mode(struct ctl_table
*ctl
, int write
,
5748 void __user
*buffer
, size_t *lenp
,
5753 struct inet6_dev
*idev
= (struct inet6_dev
*)ctl
->extra1
;
5754 struct net
*net
= (struct net
*)ctl
->extra2
;
5756 if (!rtnl_trylock())
5757 return restart_syscall();
5759 ret
= proc_dointvec(ctl
, write
, buffer
, lenp
, ppos
);
5762 new_val
= *((int *)ctl
->data
);
5764 if (check_addr_gen_mode(new_val
) < 0) {
5769 /* request for default */
5770 if (&net
->ipv6
.devconf_dflt
->addr_gen_mode
== ctl
->data
) {
5771 ipv6_devconf_dflt
.addr_gen_mode
= new_val
;
5773 /* request for individual net device */
5778 if (check_stable_privacy(idev
, net
, new_val
) < 0) {
5783 if (idev
->cnf
.addr_gen_mode
!= new_val
) {
5784 idev
->cnf
.addr_gen_mode
= new_val
;
5785 addrconf_dev_config(idev
->dev
);
5796 static int addrconf_sysctl_stable_secret(struct ctl_table
*ctl
, int write
,
5797 void __user
*buffer
, size_t *lenp
,
5801 struct in6_addr addr
;
5802 char str
[IPV6_MAX_STRLEN
];
5803 struct ctl_table lctl
= *ctl
;
5804 struct net
*net
= ctl
->extra2
;
5805 struct ipv6_stable_secret
*secret
= ctl
->data
;
5807 if (&net
->ipv6
.devconf_all
->stable_secret
== ctl
->data
)
5810 lctl
.maxlen
= IPV6_MAX_STRLEN
;
5813 if (!rtnl_trylock())
5814 return restart_syscall();
5816 if (!write
&& !secret
->initialized
) {
5821 err
= snprintf(str
, sizeof(str
), "%pI6", &secret
->secret
);
5822 if (err
>= sizeof(str
)) {
5827 err
= proc_dostring(&lctl
, write
, buffer
, lenp
, ppos
);
5831 if (in6_pton(str
, -1, addr
.in6_u
.u6_addr8
, -1, NULL
) != 1) {
5836 secret
->initialized
= true;
5837 secret
->secret
= addr
;
5839 if (&net
->ipv6
.devconf_dflt
->stable_secret
== ctl
->data
) {
5840 struct net_device
*dev
;
5842 for_each_netdev(net
, dev
) {
5843 struct inet6_dev
*idev
= __in6_dev_get(dev
);
5846 idev
->cnf
.addr_gen_mode
=
5847 IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
5851 struct inet6_dev
*idev
= ctl
->extra1
;
5853 idev
->cnf
.addr_gen_mode
= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
5863 int addrconf_sysctl_ignore_routes_with_linkdown(struct ctl_table
*ctl
,
5865 void __user
*buffer
,
5869 int *valp
= ctl
->data
;
5872 struct ctl_table lctl
;
5875 /* ctl->data points to idev->cnf.ignore_routes_when_linkdown
5876 * we should not modify it until we get the rtnl lock.
5881 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
5884 ret
= addrconf_fixup_linkdown(ctl
, valp
, val
);
5891 void addrconf_set_nopolicy(struct rt6_info
*rt
, int action
)
5895 rt
->dst
.flags
|= DST_NOPOLICY
;
5897 rt
->dst
.flags
&= ~DST_NOPOLICY
;
5902 void addrconf_disable_policy_idev(struct inet6_dev
*idev
, int val
)
5904 struct inet6_ifaddr
*ifa
;
5906 read_lock_bh(&idev
->lock
);
5907 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
5908 spin_lock(&ifa
->lock
);
5910 struct rt6_info
*rt
= ifa
->rt
;
5914 addrconf_set_nopolicy(ifa
->rt
, val
);
5915 if (rt
->rt6i_pcpu
) {
5916 for_each_possible_cpu(cpu
) {
5917 struct rt6_info
**rtp
;
5919 rtp
= per_cpu_ptr(rt
->rt6i_pcpu
, cpu
);
5920 addrconf_set_nopolicy(*rtp
, val
);
5925 spin_unlock(&ifa
->lock
);
5927 read_unlock_bh(&idev
->lock
);
5931 int addrconf_disable_policy(struct ctl_table
*ctl
, int *valp
, int val
)
5933 struct inet6_dev
*idev
;
5936 if (!rtnl_trylock())
5937 return restart_syscall();
5941 net
= (struct net
*)ctl
->extra2
;
5942 if (valp
== &net
->ipv6
.devconf_dflt
->disable_policy
) {
5947 if (valp
== &net
->ipv6
.devconf_all
->disable_policy
) {
5948 struct net_device
*dev
;
5950 for_each_netdev(net
, dev
) {
5951 idev
= __in6_dev_get(dev
);
5953 addrconf_disable_policy_idev(idev
, val
);
5956 idev
= (struct inet6_dev
*)ctl
->extra1
;
5957 addrconf_disable_policy_idev(idev
, val
);
5965 int addrconf_sysctl_disable_policy(struct ctl_table
*ctl
, int write
,
5966 void __user
*buffer
, size_t *lenp
,
5969 int *valp
= ctl
->data
;
5972 struct ctl_table lctl
;
5977 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
5979 if (write
&& (*valp
!= val
))
5980 ret
= addrconf_disable_policy(ctl
, valp
, val
);
5988 static int minus_one
= -1;
5989 static const int zero
= 0;
5990 static const int one
= 1;
5991 static const int two_five_five
= 255;
5993 static const struct ctl_table addrconf_sysctl
[] = {
5995 .procname
= "forwarding",
5996 .data
= &ipv6_devconf
.forwarding
,
5997 .maxlen
= sizeof(int),
5999 .proc_handler
= addrconf_sysctl_forward
,
6002 .procname
= "hop_limit",
6003 .data
= &ipv6_devconf
.hop_limit
,
6004 .maxlen
= sizeof(int),
6006 .proc_handler
= proc_dointvec_minmax
,
6007 .extra1
= (void *)&one
,
6008 .extra2
= (void *)&two_five_five
,
6012 .data
= &ipv6_devconf
.mtu6
,
6013 .maxlen
= sizeof(int),
6015 .proc_handler
= addrconf_sysctl_mtu
,
6018 .procname
= "accept_ra",
6019 .data
= &ipv6_devconf
.accept_ra
,
6020 .maxlen
= sizeof(int),
6022 .proc_handler
= proc_dointvec
,
6025 .procname
= "accept_redirects",
6026 .data
= &ipv6_devconf
.accept_redirects
,
6027 .maxlen
= sizeof(int),
6029 .proc_handler
= proc_dointvec
,
6032 .procname
= "autoconf",
6033 .data
= &ipv6_devconf
.autoconf
,
6034 .maxlen
= sizeof(int),
6036 .proc_handler
= proc_dointvec
,
6039 .procname
= "dad_transmits",
6040 .data
= &ipv6_devconf
.dad_transmits
,
6041 .maxlen
= sizeof(int),
6043 .proc_handler
= proc_dointvec
,
6046 .procname
= "router_solicitations",
6047 .data
= &ipv6_devconf
.rtr_solicits
,
6048 .maxlen
= sizeof(int),
6050 .proc_handler
= proc_dointvec_minmax
,
6051 .extra1
= &minus_one
,
6054 .procname
= "router_solicitation_interval",
6055 .data
= &ipv6_devconf
.rtr_solicit_interval
,
6056 .maxlen
= sizeof(int),
6058 .proc_handler
= proc_dointvec_jiffies
,
6061 .procname
= "router_solicitation_max_interval",
6062 .data
= &ipv6_devconf
.rtr_solicit_max_interval
,
6063 .maxlen
= sizeof(int),
6065 .proc_handler
= proc_dointvec_jiffies
,
6068 .procname
= "router_solicitation_delay",
6069 .data
= &ipv6_devconf
.rtr_solicit_delay
,
6070 .maxlen
= sizeof(int),
6072 .proc_handler
= proc_dointvec_jiffies
,
6075 .procname
= "force_mld_version",
6076 .data
= &ipv6_devconf
.force_mld_version
,
6077 .maxlen
= sizeof(int),
6079 .proc_handler
= proc_dointvec
,
6082 .procname
= "mldv1_unsolicited_report_interval",
6084 &ipv6_devconf
.mldv1_unsolicited_report_interval
,
6085 .maxlen
= sizeof(int),
6087 .proc_handler
= proc_dointvec_ms_jiffies
,
6090 .procname
= "mldv2_unsolicited_report_interval",
6092 &ipv6_devconf
.mldv2_unsolicited_report_interval
,
6093 .maxlen
= sizeof(int),
6095 .proc_handler
= proc_dointvec_ms_jiffies
,
6098 .procname
= "use_tempaddr",
6099 .data
= &ipv6_devconf
.use_tempaddr
,
6100 .maxlen
= sizeof(int),
6102 .proc_handler
= proc_dointvec
,
6105 .procname
= "temp_valid_lft",
6106 .data
= &ipv6_devconf
.temp_valid_lft
,
6107 .maxlen
= sizeof(int),
6109 .proc_handler
= proc_dointvec
,
6112 .procname
= "temp_prefered_lft",
6113 .data
= &ipv6_devconf
.temp_prefered_lft
,
6114 .maxlen
= sizeof(int),
6116 .proc_handler
= proc_dointvec
,
6119 .procname
= "regen_max_retry",
6120 .data
= &ipv6_devconf
.regen_max_retry
,
6121 .maxlen
= sizeof(int),
6123 .proc_handler
= proc_dointvec
,
6126 .procname
= "max_desync_factor",
6127 .data
= &ipv6_devconf
.max_desync_factor
,
6128 .maxlen
= sizeof(int),
6130 .proc_handler
= proc_dointvec
,
6133 .procname
= "max_addresses",
6134 .data
= &ipv6_devconf
.max_addresses
,
6135 .maxlen
= sizeof(int),
6137 .proc_handler
= proc_dointvec
,
6140 .procname
= "accept_ra_defrtr",
6141 .data
= &ipv6_devconf
.accept_ra_defrtr
,
6142 .maxlen
= sizeof(int),
6144 .proc_handler
= proc_dointvec
,
6147 .procname
= "accept_ra_min_hop_limit",
6148 .data
= &ipv6_devconf
.accept_ra_min_hop_limit
,
6149 .maxlen
= sizeof(int),
6151 .proc_handler
= proc_dointvec
,
6154 .procname
= "accept_ra_pinfo",
6155 .data
= &ipv6_devconf
.accept_ra_pinfo
,
6156 .maxlen
= sizeof(int),
6158 .proc_handler
= proc_dointvec
,
6160 #ifdef CONFIG_IPV6_ROUTER_PREF
6162 .procname
= "accept_ra_rtr_pref",
6163 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
6164 .maxlen
= sizeof(int),
6166 .proc_handler
= proc_dointvec
,
6169 .procname
= "router_probe_interval",
6170 .data
= &ipv6_devconf
.rtr_probe_interval
,
6171 .maxlen
= sizeof(int),
6173 .proc_handler
= proc_dointvec_jiffies
,
6175 #ifdef CONFIG_IPV6_ROUTE_INFO
6177 .procname
= "accept_ra_rt_info_min_plen",
6178 .data
= &ipv6_devconf
.accept_ra_rt_info_min_plen
,
6179 .maxlen
= sizeof(int),
6181 .proc_handler
= proc_dointvec
,
6184 .procname
= "accept_ra_rt_info_max_plen",
6185 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
6186 .maxlen
= sizeof(int),
6188 .proc_handler
= proc_dointvec
,
6193 .procname
= "proxy_ndp",
6194 .data
= &ipv6_devconf
.proxy_ndp
,
6195 .maxlen
= sizeof(int),
6197 .proc_handler
= addrconf_sysctl_proxy_ndp
,
6200 .procname
= "accept_source_route",
6201 .data
= &ipv6_devconf
.accept_source_route
,
6202 .maxlen
= sizeof(int),
6204 .proc_handler
= proc_dointvec
,
6206 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
6208 .procname
= "optimistic_dad",
6209 .data
= &ipv6_devconf
.optimistic_dad
,
6210 .maxlen
= sizeof(int),
6212 .proc_handler
= proc_dointvec
,
6215 .procname
= "use_optimistic",
6216 .data
= &ipv6_devconf
.use_optimistic
,
6217 .maxlen
= sizeof(int),
6219 .proc_handler
= proc_dointvec
,
6222 #ifdef CONFIG_IPV6_MROUTE
6224 .procname
= "mc_forwarding",
6225 .data
= &ipv6_devconf
.mc_forwarding
,
6226 .maxlen
= sizeof(int),
6228 .proc_handler
= proc_dointvec
,
6232 .procname
= "disable_ipv6",
6233 .data
= &ipv6_devconf
.disable_ipv6
,
6234 .maxlen
= sizeof(int),
6236 .proc_handler
= addrconf_sysctl_disable
,
6239 .procname
= "accept_dad",
6240 .data
= &ipv6_devconf
.accept_dad
,
6241 .maxlen
= sizeof(int),
6243 .proc_handler
= proc_dointvec
,
6246 .procname
= "force_tllao",
6247 .data
= &ipv6_devconf
.force_tllao
,
6248 .maxlen
= sizeof(int),
6250 .proc_handler
= proc_dointvec
6253 .procname
= "ndisc_notify",
6254 .data
= &ipv6_devconf
.ndisc_notify
,
6255 .maxlen
= sizeof(int),
6257 .proc_handler
= proc_dointvec
6260 .procname
= "suppress_frag_ndisc",
6261 .data
= &ipv6_devconf
.suppress_frag_ndisc
,
6262 .maxlen
= sizeof(int),
6264 .proc_handler
= proc_dointvec
6267 .procname
= "accept_ra_from_local",
6268 .data
= &ipv6_devconf
.accept_ra_from_local
,
6269 .maxlen
= sizeof(int),
6271 .proc_handler
= proc_dointvec
,
6274 .procname
= "accept_ra_mtu",
6275 .data
= &ipv6_devconf
.accept_ra_mtu
,
6276 .maxlen
= sizeof(int),
6278 .proc_handler
= proc_dointvec
,
6281 .procname
= "stable_secret",
6282 .data
= &ipv6_devconf
.stable_secret
,
6283 .maxlen
= IPV6_MAX_STRLEN
,
6285 .proc_handler
= addrconf_sysctl_stable_secret
,
6288 .procname
= "use_oif_addrs_only",
6289 .data
= &ipv6_devconf
.use_oif_addrs_only
,
6290 .maxlen
= sizeof(int),
6292 .proc_handler
= proc_dointvec
,
6295 .procname
= "ignore_routes_with_linkdown",
6296 .data
= &ipv6_devconf
.ignore_routes_with_linkdown
,
6297 .maxlen
= sizeof(int),
6299 .proc_handler
= addrconf_sysctl_ignore_routes_with_linkdown
,
6302 .procname
= "drop_unicast_in_l2_multicast",
6303 .data
= &ipv6_devconf
.drop_unicast_in_l2_multicast
,
6304 .maxlen
= sizeof(int),
6306 .proc_handler
= proc_dointvec
,
6309 .procname
= "drop_unsolicited_na",
6310 .data
= &ipv6_devconf
.drop_unsolicited_na
,
6311 .maxlen
= sizeof(int),
6313 .proc_handler
= proc_dointvec
,
6316 .procname
= "keep_addr_on_down",
6317 .data
= &ipv6_devconf
.keep_addr_on_down
,
6318 .maxlen
= sizeof(int),
6320 .proc_handler
= proc_dointvec
,
6324 .procname
= "seg6_enabled",
6325 .data
= &ipv6_devconf
.seg6_enabled
,
6326 .maxlen
= sizeof(int),
6328 .proc_handler
= proc_dointvec
,
6330 #ifdef CONFIG_IPV6_SEG6_HMAC
6332 .procname
= "seg6_require_hmac",
6333 .data
= &ipv6_devconf
.seg6_require_hmac
,
6334 .maxlen
= sizeof(int),
6336 .proc_handler
= proc_dointvec
,
6340 .procname
= "enhanced_dad",
6341 .data
= &ipv6_devconf
.enhanced_dad
,
6342 .maxlen
= sizeof(int),
6344 .proc_handler
= proc_dointvec
,
6347 .procname
= "addr_gen_mode",
6348 .data
= &ipv6_devconf
.addr_gen_mode
,
6349 .maxlen
= sizeof(int),
6351 .proc_handler
= addrconf_sysctl_addr_gen_mode
,
6354 .procname
= "disable_policy",
6355 .data
= &ipv6_devconf
.disable_policy
,
6356 .maxlen
= sizeof(int),
6358 .proc_handler
= addrconf_sysctl_disable_policy
,
6361 .procname
= "ndisc_tclass",
6362 .data
= &ipv6_devconf
.ndisc_tclass
,
6363 .maxlen
= sizeof(int),
6365 .proc_handler
= proc_dointvec_minmax
,
6366 .extra1
= (void *)&zero
,
6367 .extra2
= (void *)&two_five_five
,
6374 static int __addrconf_sysctl_register(struct net
*net
, char *dev_name
,
6375 struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
6378 struct ctl_table
*table
;
6379 char path
[sizeof("net/ipv6/conf/") + IFNAMSIZ
];
6381 table
= kmemdup(addrconf_sysctl
, sizeof(addrconf_sysctl
), GFP_KERNEL
);
6385 for (i
= 0; table
[i
].data
; i
++) {
6386 table
[i
].data
+= (char *)p
- (char *)&ipv6_devconf
;
6387 /* If one of these is already set, then it is not safe to
6388 * overwrite either of them: this makes proc_dointvec_minmax
6391 if (!table
[i
].extra1
&& !table
[i
].extra2
) {
6392 table
[i
].extra1
= idev
; /* embedded; no ref */
6393 table
[i
].extra2
= net
;
6397 snprintf(path
, sizeof(path
), "net/ipv6/conf/%s", dev_name
);
6399 p
->sysctl_header
= register_net_sysctl(net
, path
, table
);
6400 if (!p
->sysctl_header
)
6403 if (!strcmp(dev_name
, "all"))
6404 ifindex
= NETCONFA_IFINDEX_ALL
;
6405 else if (!strcmp(dev_name
, "default"))
6406 ifindex
= NETCONFA_IFINDEX_DEFAULT
;
6408 ifindex
= idev
->dev
->ifindex
;
6409 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
, NETCONFA_ALL
,
6419 static void __addrconf_sysctl_unregister(struct net
*net
,
6420 struct ipv6_devconf
*p
, int ifindex
)
6422 struct ctl_table
*table
;
6424 if (!p
->sysctl_header
)
6427 table
= p
->sysctl_header
->ctl_table_arg
;
6428 unregister_net_sysctl_table(p
->sysctl_header
);
6429 p
->sysctl_header
= NULL
;
6432 inet6_netconf_notify_devconf(net
, RTM_DELNETCONF
, 0, ifindex
, NULL
);
6435 static int addrconf_sysctl_register(struct inet6_dev
*idev
)
6439 if (!sysctl_dev_name_is_allowed(idev
->dev
->name
))
6442 err
= neigh_sysctl_register(idev
->dev
, idev
->nd_parms
,
6443 &ndisc_ifinfo_sysctl_change
);
6446 err
= __addrconf_sysctl_register(dev_net(idev
->dev
), idev
->dev
->name
,
6449 neigh_sysctl_unregister(idev
->nd_parms
);
6454 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
6456 __addrconf_sysctl_unregister(dev_net(idev
->dev
), &idev
->cnf
,
6457 idev
->dev
->ifindex
);
6458 neigh_sysctl_unregister(idev
->nd_parms
);
6464 static int __net_init
addrconf_init_net(struct net
*net
)
6467 struct ipv6_devconf
*all
, *dflt
;
6469 all
= kmemdup(&ipv6_devconf
, sizeof(ipv6_devconf
), GFP_KERNEL
);
6473 dflt
= kmemdup(&ipv6_devconf_dflt
, sizeof(ipv6_devconf_dflt
), GFP_KERNEL
);
6475 goto err_alloc_dflt
;
6477 /* these will be inherited by all namespaces */
6478 dflt
->autoconf
= ipv6_defaults
.autoconf
;
6479 dflt
->disable_ipv6
= ipv6_defaults
.disable_ipv6
;
6481 dflt
->stable_secret
.initialized
= false;
6482 all
->stable_secret
.initialized
= false;
6484 net
->ipv6
.devconf_all
= all
;
6485 net
->ipv6
.devconf_dflt
= dflt
;
6487 #ifdef CONFIG_SYSCTL
6488 err
= __addrconf_sysctl_register(net
, "all", NULL
, all
);
6492 err
= __addrconf_sysctl_register(net
, "default", NULL
, dflt
);
6498 #ifdef CONFIG_SYSCTL
6500 __addrconf_sysctl_unregister(net
, all
, NETCONFA_IFINDEX_ALL
);
6510 static void __net_exit
addrconf_exit_net(struct net
*net
)
6512 #ifdef CONFIG_SYSCTL
6513 __addrconf_sysctl_unregister(net
, net
->ipv6
.devconf_dflt
,
6514 NETCONFA_IFINDEX_DEFAULT
);
6515 __addrconf_sysctl_unregister(net
, net
->ipv6
.devconf_all
,
6516 NETCONFA_IFINDEX_ALL
);
6518 kfree(net
->ipv6
.devconf_dflt
);
6519 kfree(net
->ipv6
.devconf_all
);
6522 static struct pernet_operations addrconf_ops
= {
6523 .init
= addrconf_init_net
,
6524 .exit
= addrconf_exit_net
,
6527 static struct rtnl_af_ops inet6_ops __read_mostly
= {
6529 .fill_link_af
= inet6_fill_link_af
,
6530 .get_link_af_size
= inet6_get_link_af_size
,
6531 .validate_link_af
= inet6_validate_link_af
,
6532 .set_link_af
= inet6_set_link_af
,
6536 * Init / cleanup code
6539 int __init
addrconf_init(void)
6541 struct inet6_dev
*idev
;
6544 err
= ipv6_addr_label_init();
6546 pr_crit("%s: cannot initialize default policy table: %d\n",
6551 err
= register_pernet_subsys(&addrconf_ops
);
6555 addrconf_wq
= create_workqueue("ipv6_addrconf");
6561 /* The addrconf netdev notifier requires that loopback_dev
6562 * has it's ipv6 private information allocated and setup
6563 * before it can bring up and give link-local addresses
6564 * to other devices which are up.
6566 * Unfortunately, loopback_dev is not necessarily the first
6567 * entry in the global dev_base list of net devices. In fact,
6568 * it is likely to be the very last entry on that list.
6569 * So this causes the notifier registry below to try and
6570 * give link-local addresses to all devices besides loopback_dev
6571 * first, then loopback_dev, which cases all the non-loopback_dev
6572 * devices to fail to get a link-local address.
6574 * So, as a temporary fix, allocate the ipv6 structure for
6575 * loopback_dev first by hand.
6576 * Longer term, all of the dependencies ipv6 has upon the loopback
6577 * device and it being up should be removed.
6580 idev
= ipv6_add_dev(init_net
.loopback_dev
);
6583 err
= PTR_ERR(idev
);
6587 ip6_route_init_special_entries();
6589 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
6590 INIT_HLIST_HEAD(&inet6_addr_lst
[i
]);
6592 register_netdevice_notifier(&ipv6_dev_notf
);
6596 rtnl_af_register(&inet6_ops
);
6598 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
,
6603 /* Only the first call to __rtnl_register can fail */
6604 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
, 0);
6605 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
, 0);
6606 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
,
6607 inet6_dump_ifaddr
, RTNL_FLAG_DOIT_UNLOCKED
);
6608 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
,
6609 inet6_dump_ifmcaddr
, 0);
6610 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
,
6611 inet6_dump_ifacaddr
, 0);
6612 __rtnl_register(PF_INET6
, RTM_GETNETCONF
, inet6_netconf_get_devconf
,
6613 inet6_netconf_dump_devconf
, RTNL_FLAG_DOIT_UNLOCKED
);
6615 ipv6_addr_label_rtnl_register();
6619 rtnl_af_unregister(&inet6_ops
);
6620 unregister_netdevice_notifier(&ipv6_dev_notf
);
6622 destroy_workqueue(addrconf_wq
);
6624 unregister_pernet_subsys(&addrconf_ops
);
6626 ipv6_addr_label_cleanup();
6631 void addrconf_cleanup(void)
6633 struct net_device
*dev
;
6636 unregister_netdevice_notifier(&ipv6_dev_notf
);
6637 unregister_pernet_subsys(&addrconf_ops
);
6638 ipv6_addr_label_cleanup();
6640 rtnl_af_unregister(&inet6_ops
);
6644 /* clean dev list */
6645 for_each_netdev(&init_net
, dev
) {
6646 if (__in6_dev_get(dev
) == NULL
)
6648 addrconf_ifdown(dev
, 1);
6650 addrconf_ifdown(init_net
.loopback_dev
, 2);
6655 spin_lock_bh(&addrconf_hash_lock
);
6656 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
6657 WARN_ON(!hlist_empty(&inet6_addr_lst
[i
]));
6658 spin_unlock_bh(&addrconf_hash_lock
);
6659 cancel_delayed_work(&addr_chk_work
);
6662 destroy_workqueue(addrconf_wq
);