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(struct inet6_dev
*idev
);
156 static int ipv6_generate_stable_address(struct in6_addr
*addr
,
158 const struct inet6_dev
*idev
);
161 * Configured unicast address hash table
163 static struct hlist_head inet6_addr_lst
[IN6_ADDR_HSIZE
];
164 static DEFINE_SPINLOCK(addrconf_hash_lock
);
166 static void addrconf_verify(void);
167 static void addrconf_verify_rtnl(void);
168 static void addrconf_verify_work(struct work_struct
*);
170 static struct workqueue_struct
*addrconf_wq
;
171 static DECLARE_DELAYED_WORK(addr_chk_work
, addrconf_verify_work
);
173 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
174 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
176 static void addrconf_type_change(struct net_device
*dev
,
177 unsigned long event
);
178 static int addrconf_ifdown(struct net_device
*dev
, int how
);
180 static struct rt6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
182 const struct net_device
*dev
,
183 u32 flags
, u32 noflags
);
185 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
);
186 static void addrconf_dad_work(struct work_struct
*w
);
187 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
, bool bump_id
);
188 static void addrconf_dad_run(struct inet6_dev
*idev
);
189 static void addrconf_rs_timer(unsigned long data
);
190 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
191 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
193 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
194 struct prefix_info
*pinfo
);
195 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
196 struct net_device
*dev
);
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 a valid qdisc is available */
307 static inline bool addrconf_qdisc_ok(const struct net_device
*dev
)
309 return !qdisc_tx_is_noop(dev
);
312 static void addrconf_del_rs_timer(struct inet6_dev
*idev
)
314 if (del_timer(&idev
->rs_timer
))
318 static void addrconf_del_dad_work(struct inet6_ifaddr
*ifp
)
320 if (cancel_delayed_work(&ifp
->dad_work
))
324 static void addrconf_mod_rs_timer(struct inet6_dev
*idev
,
327 if (!timer_pending(&idev
->rs_timer
))
329 mod_timer(&idev
->rs_timer
, jiffies
+ when
);
332 static void addrconf_mod_dad_work(struct inet6_ifaddr
*ifp
,
336 if (mod_delayed_work(addrconf_wq
, &ifp
->dad_work
, delay
))
340 static int snmp6_alloc_dev(struct inet6_dev
*idev
)
344 idev
->stats
.ipv6
= alloc_percpu(struct ipstats_mib
);
345 if (!idev
->stats
.ipv6
)
348 for_each_possible_cpu(i
) {
349 struct ipstats_mib
*addrconf_stats
;
350 addrconf_stats
= per_cpu_ptr(idev
->stats
.ipv6
, i
);
351 u64_stats_init(&addrconf_stats
->syncp
);
355 idev
->stats
.icmpv6dev
= kzalloc(sizeof(struct icmpv6_mib_device
),
357 if (!idev
->stats
.icmpv6dev
)
359 idev
->stats
.icmpv6msgdev
= kzalloc(sizeof(struct icmpv6msg_mib_device
),
361 if (!idev
->stats
.icmpv6msgdev
)
367 kfree(idev
->stats
.icmpv6dev
);
369 free_percpu(idev
->stats
.ipv6
);
374 static struct inet6_dev
*ipv6_add_dev(struct net_device
*dev
)
376 struct inet6_dev
*ndev
;
381 if (dev
->mtu
< IPV6_MIN_MTU
)
382 return ERR_PTR(-EINVAL
);
384 ndev
= kzalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
388 rwlock_init(&ndev
->lock
);
390 INIT_LIST_HEAD(&ndev
->addr_list
);
391 setup_timer(&ndev
->rs_timer
, addrconf_rs_timer
,
392 (unsigned long)ndev
);
393 memcpy(&ndev
->cnf
, dev_net(dev
)->ipv6
.devconf_dflt
, sizeof(ndev
->cnf
));
395 if (ndev
->cnf
.stable_secret
.initialized
)
396 ndev
->cnf
.addr_gen_mode
= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
398 ndev
->cnf
.addr_gen_mode
= ipv6_devconf_dflt
.addr_gen_mode
;
400 ndev
->cnf
.mtu6
= dev
->mtu
;
401 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
402 if (!ndev
->nd_parms
) {
406 if (ndev
->cnf
.forwarding
)
407 dev_disable_lro(dev
);
408 /* We refer to the device */
411 if (snmp6_alloc_dev(ndev
) < 0) {
413 "%s: cannot allocate memory for statistics; dev=%s.\n",
414 __func__
, dev
->name
);
415 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
421 if (snmp6_register_dev(ndev
) < 0) {
423 "%s: cannot create /proc/net/dev_snmp6/%s\n",
424 __func__
, dev
->name
);
428 /* One reference from device. */
429 refcount_set(&ndev
->refcnt
, 1);
431 if (dev
->flags
& (IFF_NOARP
| IFF_LOOPBACK
))
432 ndev
->cnf
.accept_dad
= -1;
434 #if IS_ENABLED(CONFIG_IPV6_SIT)
435 if (dev
->type
== ARPHRD_SIT
&& (dev
->priv_flags
& IFF_ISATAP
)) {
436 pr_info("%s: Disabled Multicast RS\n", dev
->name
);
437 ndev
->cnf
.rtr_solicits
= 0;
441 INIT_LIST_HEAD(&ndev
->tempaddr_list
);
442 ndev
->desync_factor
= U32_MAX
;
443 if ((dev
->flags
&IFF_LOOPBACK
) ||
444 dev
->type
== ARPHRD_TUNNEL
||
445 dev
->type
== ARPHRD_TUNNEL6
||
446 dev
->type
== ARPHRD_SIT
||
447 dev
->type
== ARPHRD_NONE
) {
448 ndev
->cnf
.use_tempaddr
= -1;
450 ipv6_regen_rndid(ndev
);
452 ndev
->token
= in6addr_any
;
454 if (netif_running(dev
) && addrconf_qdisc_ok(dev
))
455 ndev
->if_flags
|= IF_READY
;
457 ipv6_mc_init_dev(ndev
);
458 ndev
->tstamp
= jiffies
;
459 err
= addrconf_sysctl_register(ndev
);
461 ipv6_mc_destroy_dev(ndev
);
462 snmp6_unregister_dev(ndev
);
465 /* protected by rtnl_lock */
466 rcu_assign_pointer(dev
->ip6_ptr
, ndev
);
468 /* Join interface-local all-node multicast group */
469 ipv6_dev_mc_inc(dev
, &in6addr_interfacelocal_allnodes
);
471 /* Join all-node multicast group */
472 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allnodes
);
474 /* Join all-router multicast group if forwarding is set */
475 if (ndev
->cnf
.forwarding
&& (dev
->flags
& IFF_MULTICAST
))
476 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
481 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
483 in6_dev_finish_destroy(ndev
);
487 static struct inet6_dev
*ipv6_find_idev(struct net_device
*dev
)
489 struct inet6_dev
*idev
;
493 idev
= __in6_dev_get(dev
);
495 idev
= ipv6_add_dev(dev
);
500 if (dev
->flags
&IFF_UP
)
505 static int inet6_netconf_msgsize_devconf(int type
)
507 int size
= NLMSG_ALIGN(sizeof(struct netconfmsg
))
508 + nla_total_size(4); /* NETCONFA_IFINDEX */
511 if (type
== NETCONFA_ALL
)
514 if (all
|| type
== NETCONFA_FORWARDING
)
515 size
+= nla_total_size(4);
516 #ifdef CONFIG_IPV6_MROUTE
517 if (all
|| type
== NETCONFA_MC_FORWARDING
)
518 size
+= nla_total_size(4);
520 if (all
|| type
== NETCONFA_PROXY_NEIGH
)
521 size
+= nla_total_size(4);
523 if (all
|| type
== NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
)
524 size
+= nla_total_size(4);
529 static int inet6_netconf_fill_devconf(struct sk_buff
*skb
, int ifindex
,
530 struct ipv6_devconf
*devconf
, u32 portid
,
531 u32 seq
, int event
, unsigned int flags
,
534 struct nlmsghdr
*nlh
;
535 struct netconfmsg
*ncm
;
538 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct netconfmsg
),
543 if (type
== NETCONFA_ALL
)
546 ncm
= nlmsg_data(nlh
);
547 ncm
->ncm_family
= AF_INET6
;
549 if (nla_put_s32(skb
, NETCONFA_IFINDEX
, ifindex
) < 0)
550 goto nla_put_failure
;
555 if ((all
|| type
== NETCONFA_FORWARDING
) &&
556 nla_put_s32(skb
, NETCONFA_FORWARDING
, devconf
->forwarding
) < 0)
557 goto nla_put_failure
;
558 #ifdef CONFIG_IPV6_MROUTE
559 if ((all
|| type
== NETCONFA_MC_FORWARDING
) &&
560 nla_put_s32(skb
, NETCONFA_MC_FORWARDING
,
561 devconf
->mc_forwarding
) < 0)
562 goto nla_put_failure
;
564 if ((all
|| type
== NETCONFA_PROXY_NEIGH
) &&
565 nla_put_s32(skb
, NETCONFA_PROXY_NEIGH
, devconf
->proxy_ndp
) < 0)
566 goto nla_put_failure
;
568 if ((all
|| type
== NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
) &&
569 nla_put_s32(skb
, NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
,
570 devconf
->ignore_routes_with_linkdown
) < 0)
571 goto nla_put_failure
;
578 nlmsg_cancel(skb
, nlh
);
582 void inet6_netconf_notify_devconf(struct net
*net
, int event
, int type
,
583 int ifindex
, struct ipv6_devconf
*devconf
)
588 skb
= nlmsg_new(inet6_netconf_msgsize_devconf(type
), GFP_KERNEL
);
592 err
= inet6_netconf_fill_devconf(skb
, ifindex
, devconf
, 0, 0,
595 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
596 WARN_ON(err
== -EMSGSIZE
);
600 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_NETCONF
, NULL
, GFP_KERNEL
);
603 rtnl_set_sk_err(net
, RTNLGRP_IPV6_NETCONF
, err
);
606 static const struct nla_policy devconf_ipv6_policy
[NETCONFA_MAX
+1] = {
607 [NETCONFA_IFINDEX
] = { .len
= sizeof(int) },
608 [NETCONFA_FORWARDING
] = { .len
= sizeof(int) },
609 [NETCONFA_PROXY_NEIGH
] = { .len
= sizeof(int) },
610 [NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
] = { .len
= sizeof(int) },
613 static int inet6_netconf_get_devconf(struct sk_buff
*in_skb
,
614 struct nlmsghdr
*nlh
,
615 struct netlink_ext_ack
*extack
)
617 struct net
*net
= sock_net(in_skb
->sk
);
618 struct nlattr
*tb
[NETCONFA_MAX
+1];
619 struct netconfmsg
*ncm
;
621 struct ipv6_devconf
*devconf
;
622 struct inet6_dev
*in6_dev
;
623 struct net_device
*dev
;
627 err
= nlmsg_parse(nlh
, sizeof(*ncm
), tb
, NETCONFA_MAX
,
628 devconf_ipv6_policy
, extack
);
633 if (!tb
[NETCONFA_IFINDEX
])
636 ifindex
= nla_get_s32(tb
[NETCONFA_IFINDEX
]);
638 case NETCONFA_IFINDEX_ALL
:
639 devconf
= net
->ipv6
.devconf_all
;
641 case NETCONFA_IFINDEX_DEFAULT
:
642 devconf
= net
->ipv6
.devconf_dflt
;
645 dev
= __dev_get_by_index(net
, ifindex
);
648 in6_dev
= __in6_dev_get(dev
);
651 devconf
= &in6_dev
->cnf
;
656 skb
= nlmsg_new(inet6_netconf_msgsize_devconf(NETCONFA_ALL
), GFP_ATOMIC
);
660 err
= inet6_netconf_fill_devconf(skb
, ifindex
, devconf
,
661 NETLINK_CB(in_skb
).portid
,
662 nlh
->nlmsg_seq
, RTM_NEWNETCONF
, 0,
665 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
666 WARN_ON(err
== -EMSGSIZE
);
670 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).portid
);
675 static int inet6_netconf_dump_devconf(struct sk_buff
*skb
,
676 struct netlink_callback
*cb
)
678 struct net
*net
= sock_net(skb
->sk
);
681 struct net_device
*dev
;
682 struct inet6_dev
*idev
;
683 struct hlist_head
*head
;
686 s_idx
= idx
= cb
->args
[1];
688 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
690 head
= &net
->dev_index_head
[h
];
692 cb
->seq
= atomic_read(&net
->ipv6
.dev_addr_genid
) ^
694 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
697 idev
= __in6_dev_get(dev
);
701 if (inet6_netconf_fill_devconf(skb
, dev
->ifindex
,
703 NETLINK_CB(cb
->skb
).portid
,
711 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
717 if (h
== NETDEV_HASHENTRIES
) {
718 if (inet6_netconf_fill_devconf(skb
, NETCONFA_IFINDEX_ALL
,
719 net
->ipv6
.devconf_all
,
720 NETLINK_CB(cb
->skb
).portid
,
722 RTM_NEWNETCONF
, NLM_F_MULTI
,
728 if (h
== NETDEV_HASHENTRIES
+ 1) {
729 if (inet6_netconf_fill_devconf(skb
, NETCONFA_IFINDEX_DEFAULT
,
730 net
->ipv6
.devconf_dflt
,
731 NETLINK_CB(cb
->skb
).portid
,
733 RTM_NEWNETCONF
, NLM_F_MULTI
,
747 static void dev_forward_change(struct inet6_dev
*idev
)
749 struct net_device
*dev
;
750 struct inet6_ifaddr
*ifa
;
755 if (idev
->cnf
.forwarding
)
756 dev_disable_lro(dev
);
757 if (dev
->flags
& IFF_MULTICAST
) {
758 if (idev
->cnf
.forwarding
) {
759 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
760 ipv6_dev_mc_inc(dev
, &in6addr_interfacelocal_allrouters
);
761 ipv6_dev_mc_inc(dev
, &in6addr_sitelocal_allrouters
);
763 ipv6_dev_mc_dec(dev
, &in6addr_linklocal_allrouters
);
764 ipv6_dev_mc_dec(dev
, &in6addr_interfacelocal_allrouters
);
765 ipv6_dev_mc_dec(dev
, &in6addr_sitelocal_allrouters
);
769 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
770 if (ifa
->flags
&IFA_F_TENTATIVE
)
772 if (idev
->cnf
.forwarding
)
773 addrconf_join_anycast(ifa
);
775 addrconf_leave_anycast(ifa
);
777 inet6_netconf_notify_devconf(dev_net(dev
), RTM_NEWNETCONF
,
779 dev
->ifindex
, &idev
->cnf
);
783 static void addrconf_forward_change(struct net
*net
, __s32 newf
)
785 struct net_device
*dev
;
786 struct inet6_dev
*idev
;
788 for_each_netdev(net
, dev
) {
789 idev
= __in6_dev_get(dev
);
791 int changed
= (!idev
->cnf
.forwarding
) ^ (!newf
);
792 idev
->cnf
.forwarding
= newf
;
794 dev_forward_change(idev
);
799 static int addrconf_fixup_forwarding(struct ctl_table
*table
, int *p
, int newf
)
805 return restart_syscall();
807 net
= (struct net
*)table
->extra2
;
811 if (p
== &net
->ipv6
.devconf_dflt
->forwarding
) {
812 if ((!newf
) ^ (!old
))
813 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
815 NETCONFA_IFINDEX_DEFAULT
,
816 net
->ipv6
.devconf_dflt
);
821 if (p
== &net
->ipv6
.devconf_all
->forwarding
) {
822 int old_dflt
= net
->ipv6
.devconf_dflt
->forwarding
;
824 net
->ipv6
.devconf_dflt
->forwarding
= newf
;
825 if ((!newf
) ^ (!old_dflt
))
826 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
828 NETCONFA_IFINDEX_DEFAULT
,
829 net
->ipv6
.devconf_dflt
);
831 addrconf_forward_change(net
, newf
);
832 if ((!newf
) ^ (!old
))
833 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
835 NETCONFA_IFINDEX_ALL
,
836 net
->ipv6
.devconf_all
);
837 } else if ((!newf
) ^ (!old
))
838 dev_forward_change((struct inet6_dev
*)table
->extra1
);
842 rt6_purge_dflt_routers(net
);
846 static void addrconf_linkdown_change(struct net
*net
, __s32 newf
)
848 struct net_device
*dev
;
849 struct inet6_dev
*idev
;
851 for_each_netdev(net
, dev
) {
852 idev
= __in6_dev_get(dev
);
854 int changed
= (!idev
->cnf
.ignore_routes_with_linkdown
) ^ (!newf
);
856 idev
->cnf
.ignore_routes_with_linkdown
= newf
;
858 inet6_netconf_notify_devconf(dev_net(dev
),
860 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
,
867 static int addrconf_fixup_linkdown(struct ctl_table
*table
, int *p
, int newf
)
873 return restart_syscall();
875 net
= (struct net
*)table
->extra2
;
879 if (p
== &net
->ipv6
.devconf_dflt
->ignore_routes_with_linkdown
) {
880 if ((!newf
) ^ (!old
))
881 inet6_netconf_notify_devconf(net
,
883 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
,
884 NETCONFA_IFINDEX_DEFAULT
,
885 net
->ipv6
.devconf_dflt
);
890 if (p
== &net
->ipv6
.devconf_all
->ignore_routes_with_linkdown
) {
891 net
->ipv6
.devconf_dflt
->ignore_routes_with_linkdown
= newf
;
892 addrconf_linkdown_change(net
, newf
);
893 if ((!newf
) ^ (!old
))
894 inet6_netconf_notify_devconf(net
,
896 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
,
897 NETCONFA_IFINDEX_ALL
,
898 net
->ipv6
.devconf_all
);
907 /* Nobody refers to this ifaddr, destroy it */
908 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
910 WARN_ON(!hlist_unhashed(&ifp
->addr_lst
));
912 #ifdef NET_REFCNT_DEBUG
913 pr_debug("%s\n", __func__
);
916 in6_dev_put(ifp
->idev
);
918 if (cancel_delayed_work(&ifp
->dad_work
))
919 pr_notice("delayed DAD work was pending while freeing ifa=%p\n",
922 if (ifp
->state
!= INET6_IFADDR_STATE_DEAD
) {
923 pr_warn("Freeing alive inet6 address %p\n", ifp
);
932 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
935 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
938 * Each device address list is sorted in order of scope -
939 * global before linklocal.
941 list_for_each(p
, &idev
->addr_list
) {
942 struct inet6_ifaddr
*ifa
943 = list_entry(p
, struct inet6_ifaddr
, if_list
);
944 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
948 list_add_tail(&ifp
->if_list
, p
);
951 static u32
inet6_addr_hash(const struct in6_addr
*addr
)
953 return hash_32(ipv6_addr_hash(addr
), IN6_ADDR_HSIZE_SHIFT
);
956 /* On success it returns ifp with increased reference count */
958 static struct inet6_ifaddr
*
959 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
960 const struct in6_addr
*peer_addr
, int pfxlen
,
961 int scope
, u32 flags
, u32 valid_lft
, u32 prefered_lft
)
963 struct net
*net
= dev_net(idev
->dev
);
964 struct inet6_ifaddr
*ifa
= NULL
;
966 struct in6_validator_info i6vi
;
969 int addr_type
= ipv6_addr_type(addr
);
971 if (addr_type
== IPV6_ADDR_ANY
||
972 addr_type
& IPV6_ADDR_MULTICAST
||
973 (!(idev
->dev
->flags
& IFF_LOOPBACK
) &&
974 addr_type
& IPV6_ADDR_LOOPBACK
))
975 return ERR_PTR(-EADDRNOTAVAIL
);
982 err
= -ENODEV
; /*XXX*/
986 if (idev
->cnf
.disable_ipv6
) {
991 i6vi
.i6vi_addr
= *addr
;
992 i6vi
.i6vi_dev
= idev
;
993 rcu_read_unlock_bh();
995 err
= inet6addr_validator_notifier_call_chain(NETDEV_UP
, &i6vi
);
998 err
= notifier_to_errno(err
);
1002 spin_lock(&addrconf_hash_lock
);
1004 /* Ignore adding duplicate addresses on an interface */
1005 if (ipv6_chk_same_addr(dev_net(idev
->dev
), addr
, idev
->dev
)) {
1006 ADBG("ipv6_add_addr: already assigned\n");
1011 ifa
= kzalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
1014 ADBG("ipv6_add_addr: malloc failed\n");
1019 rt
= addrconf_dst_alloc(idev
, addr
, false);
1025 if (net
->ipv6
.devconf_all
->disable_policy
||
1026 idev
->cnf
.disable_policy
)
1027 rt
->dst
.flags
|= DST_NOPOLICY
;
1029 neigh_parms_data_state_setall(idev
->nd_parms
);
1033 ifa
->peer_addr
= *peer_addr
;
1035 spin_lock_init(&ifa
->lock
);
1036 INIT_DELAYED_WORK(&ifa
->dad_work
, addrconf_dad_work
);
1037 INIT_HLIST_NODE(&ifa
->addr_lst
);
1039 ifa
->prefix_len
= pfxlen
;
1041 /* No need to add the TENTATIVE flag for addresses with NODAD */
1042 if (!(flags
& IFA_F_NODAD
))
1043 ifa
->flags
|= IFA_F_TENTATIVE
;
1044 ifa
->valid_lft
= valid_lft
;
1045 ifa
->prefered_lft
= prefered_lft
;
1046 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
1047 ifa
->tokenized
= false;
1053 refcount_set(&ifa
->refcnt
, 1);
1055 /* Add to big hash table */
1056 hash
= inet6_addr_hash(addr
);
1058 hlist_add_head_rcu(&ifa
->addr_lst
, &inet6_addr_lst
[hash
]);
1059 spin_unlock(&addrconf_hash_lock
);
1061 write_lock(&idev
->lock
);
1062 /* Add to inet6_dev unicast addr list. */
1063 ipv6_link_dev_addr(idev
, ifa
);
1065 if (ifa
->flags
&IFA_F_TEMPORARY
) {
1066 list_add(&ifa
->tmp_list
, &idev
->tempaddr_list
);
1071 write_unlock(&idev
->lock
);
1073 rcu_read_unlock_bh();
1075 if (likely(err
== 0))
1076 inet6addr_notifier_call_chain(NETDEV_UP
, ifa
);
1085 spin_unlock(&addrconf_hash_lock
);
1089 enum cleanup_prefix_rt_t
{
1090 CLEANUP_PREFIX_RT_NOP
, /* no cleanup action for prefix route */
1091 CLEANUP_PREFIX_RT_DEL
, /* delete the prefix route */
1092 CLEANUP_PREFIX_RT_EXPIRE
, /* update the lifetime of the prefix route */
1096 * Check, whether the prefix for ifp would still need a prefix route
1097 * after deleting ifp. The function returns one of the CLEANUP_PREFIX_RT_*
1100 * 1) we don't purge prefix if address was not permanent.
1101 * prefix is managed by its own lifetime.
1102 * 2) we also don't purge, if the address was IFA_F_NOPREFIXROUTE.
1103 * 3) if there are no addresses, delete prefix.
1104 * 4) if there are still other permanent address(es),
1105 * corresponding prefix is still permanent.
1106 * 5) if there are still other addresses with IFA_F_NOPREFIXROUTE,
1107 * don't purge the prefix, assume user space is managing it.
1108 * 6) otherwise, update prefix lifetime to the
1109 * longest valid lifetime among the corresponding
1110 * addresses on the device.
1111 * Note: subsequent RA will update lifetime.
1113 static enum cleanup_prefix_rt_t
1114 check_cleanup_prefix_route(struct inet6_ifaddr
*ifp
, unsigned long *expires
)
1116 struct inet6_ifaddr
*ifa
;
1117 struct inet6_dev
*idev
= ifp
->idev
;
1118 unsigned long lifetime
;
1119 enum cleanup_prefix_rt_t action
= CLEANUP_PREFIX_RT_DEL
;
1123 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
1126 if (!ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
1129 if (ifa
->flags
& (IFA_F_PERMANENT
| IFA_F_NOPREFIXROUTE
))
1130 return CLEANUP_PREFIX_RT_NOP
;
1132 action
= CLEANUP_PREFIX_RT_EXPIRE
;
1134 spin_lock(&ifa
->lock
);
1136 lifetime
= addrconf_timeout_fixup(ifa
->valid_lft
, HZ
);
1138 * Note: Because this address is
1139 * not permanent, lifetime <
1140 * LONG_MAX / HZ here.
1142 if (time_before(*expires
, ifa
->tstamp
+ lifetime
* HZ
))
1143 *expires
= ifa
->tstamp
+ lifetime
* HZ
;
1144 spin_unlock(&ifa
->lock
);
1151 cleanup_prefix_route(struct inet6_ifaddr
*ifp
, unsigned long expires
, bool del_rt
)
1153 struct rt6_info
*rt
;
1155 rt
= addrconf_get_prefix_route(&ifp
->addr
,
1158 0, RTF_GATEWAY
| RTF_DEFAULT
);
1163 if (!(rt
->rt6i_flags
& RTF_EXPIRES
))
1164 rt6_set_expires(rt
, expires
);
1171 /* This function wants to get referenced ifp and releases it before return */
1173 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
1176 enum cleanup_prefix_rt_t action
= CLEANUP_PREFIX_RT_NOP
;
1177 unsigned long expires
;
1181 spin_lock_bh(&ifp
->lock
);
1183 ifp
->state
= INET6_IFADDR_STATE_DEAD
;
1184 spin_unlock_bh(&ifp
->lock
);
1186 if (state
== INET6_IFADDR_STATE_DEAD
)
1189 spin_lock_bh(&addrconf_hash_lock
);
1190 hlist_del_init_rcu(&ifp
->addr_lst
);
1191 spin_unlock_bh(&addrconf_hash_lock
);
1193 write_lock_bh(&ifp
->idev
->lock
);
1195 if (ifp
->flags
&IFA_F_TEMPORARY
) {
1196 list_del(&ifp
->tmp_list
);
1198 in6_ifa_put(ifp
->ifpub
);
1204 if (ifp
->flags
& IFA_F_PERMANENT
&& !(ifp
->flags
& IFA_F_NOPREFIXROUTE
))
1205 action
= check_cleanup_prefix_route(ifp
, &expires
);
1207 list_del_init(&ifp
->if_list
);
1210 write_unlock_bh(&ifp
->idev
->lock
);
1212 addrconf_del_dad_work(ifp
);
1214 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
1216 inet6addr_notifier_call_chain(NETDEV_DOWN
, ifp
);
1218 if (action
!= CLEANUP_PREFIX_RT_NOP
) {
1219 cleanup_prefix_route(ifp
, expires
,
1220 action
== CLEANUP_PREFIX_RT_DEL
);
1223 /* clean up prefsrc entries */
1224 rt6_remove_prefsrc(ifp
);
1229 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
1231 struct inet6_dev
*idev
= ifp
->idev
;
1232 struct in6_addr addr
, *tmpaddr
;
1233 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_tstamp
, age
;
1234 unsigned long regen_advance
;
1238 unsigned long now
= jiffies
;
1239 long max_desync_factor
;
1240 s32 cnf_temp_preferred_lft
;
1242 write_lock_bh(&idev
->lock
);
1244 spin_lock_bh(&ift
->lock
);
1245 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
1246 spin_unlock_bh(&ift
->lock
);
1253 if (idev
->cnf
.use_tempaddr
<= 0) {
1254 write_unlock_bh(&idev
->lock
);
1255 pr_info("%s: use_tempaddr is disabled\n", __func__
);
1260 spin_lock_bh(&ifp
->lock
);
1261 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
1262 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
1263 spin_unlock_bh(&ifp
->lock
);
1264 write_unlock_bh(&idev
->lock
);
1265 pr_warn("%s: regeneration time exceeded - disabled temporary address support\n",
1272 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
1273 ipv6_try_regen_rndid(idev
, tmpaddr
);
1274 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
1275 age
= (now
- ifp
->tstamp
) / HZ
;
1277 regen_advance
= idev
->cnf
.regen_max_retry
*
1278 idev
->cnf
.dad_transmits
*
1279 NEIGH_VAR(idev
->nd_parms
, RETRANS_TIME
) / HZ
;
1281 /* recalculate max_desync_factor each time and update
1282 * idev->desync_factor if it's larger
1284 cnf_temp_preferred_lft
= READ_ONCE(idev
->cnf
.temp_prefered_lft
);
1285 max_desync_factor
= min_t(__u32
,
1286 idev
->cnf
.max_desync_factor
,
1287 cnf_temp_preferred_lft
- regen_advance
);
1289 if (unlikely(idev
->desync_factor
> max_desync_factor
)) {
1290 if (max_desync_factor
> 0) {
1291 get_random_bytes(&idev
->desync_factor
,
1292 sizeof(idev
->desync_factor
));
1293 idev
->desync_factor
%= max_desync_factor
;
1295 idev
->desync_factor
= 0;
1299 tmp_valid_lft
= min_t(__u32
,
1301 idev
->cnf
.temp_valid_lft
+ age
);
1302 tmp_prefered_lft
= cnf_temp_preferred_lft
+ age
-
1303 idev
->desync_factor
;
1304 tmp_prefered_lft
= min_t(__u32
, ifp
->prefered_lft
, tmp_prefered_lft
);
1305 tmp_plen
= ifp
->prefix_len
;
1306 tmp_tstamp
= ifp
->tstamp
;
1307 spin_unlock_bh(&ifp
->lock
);
1309 write_unlock_bh(&idev
->lock
);
1311 /* A temporary address is created only if this calculated Preferred
1312 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
1313 * an implementation must not create a temporary address with a zero
1314 * Preferred Lifetime.
1315 * Use age calculation as in addrconf_verify to avoid unnecessary
1316 * temporary addresses being generated.
1318 age
= (now
- tmp_tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
1319 if (tmp_prefered_lft
<= regen_advance
+ age
) {
1326 addr_flags
= IFA_F_TEMPORARY
;
1327 /* set in addrconf_prefix_rcv() */
1328 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
1329 addr_flags
|= IFA_F_OPTIMISTIC
;
1331 ift
= ipv6_add_addr(idev
, &addr
, NULL
, tmp_plen
,
1332 ipv6_addr_scope(&addr
), addr_flags
,
1333 tmp_valid_lft
, tmp_prefered_lft
);
1337 pr_info("%s: retry temporary address regeneration\n", __func__
);
1339 write_lock_bh(&idev
->lock
);
1343 spin_lock_bh(&ift
->lock
);
1346 ift
->tstamp
= tmp_tstamp
;
1347 spin_unlock_bh(&ift
->lock
);
1349 addrconf_dad_start(ift
);
1357 * Choose an appropriate source address (RFC3484)
1360 IPV6_SADDR_RULE_INIT
= 0,
1361 IPV6_SADDR_RULE_LOCAL
,
1362 IPV6_SADDR_RULE_SCOPE
,
1363 IPV6_SADDR_RULE_PREFERRED
,
1364 #ifdef CONFIG_IPV6_MIP6
1365 IPV6_SADDR_RULE_HOA
,
1367 IPV6_SADDR_RULE_OIF
,
1368 IPV6_SADDR_RULE_LABEL
,
1369 IPV6_SADDR_RULE_PRIVACY
,
1370 IPV6_SADDR_RULE_ORCHID
,
1371 IPV6_SADDR_RULE_PREFIX
,
1372 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1373 IPV6_SADDR_RULE_NOT_OPTIMISTIC
,
1378 struct ipv6_saddr_score
{
1381 struct inet6_ifaddr
*ifa
;
1382 DECLARE_BITMAP(scorebits
, IPV6_SADDR_RULE_MAX
);
1387 struct ipv6_saddr_dst
{
1388 const struct in6_addr
*addr
;
1395 static inline int ipv6_saddr_preferred(int type
)
1397 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|IPV6_ADDR_LOOPBACK
))
1402 static bool ipv6_use_optimistic_addr(struct net
*net
,
1403 struct inet6_dev
*idev
)
1405 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1408 if (!net
->ipv6
.devconf_all
->optimistic_dad
&& !idev
->cnf
.optimistic_dad
)
1410 if (!net
->ipv6
.devconf_all
->use_optimistic
&& !idev
->cnf
.use_optimistic
)
1419 static int ipv6_get_saddr_eval(struct net
*net
,
1420 struct ipv6_saddr_score
*score
,
1421 struct ipv6_saddr_dst
*dst
,
1426 if (i
<= score
->rule
) {
1428 case IPV6_SADDR_RULE_SCOPE
:
1429 ret
= score
->scopedist
;
1431 case IPV6_SADDR_RULE_PREFIX
:
1432 ret
= score
->matchlen
;
1435 ret
= !!test_bit(i
, score
->scorebits
);
1441 case IPV6_SADDR_RULE_INIT
:
1442 /* Rule 0: remember if hiscore is not ready yet */
1445 case IPV6_SADDR_RULE_LOCAL
:
1446 /* Rule 1: Prefer same address */
1447 ret
= ipv6_addr_equal(&score
->ifa
->addr
, dst
->addr
);
1449 case IPV6_SADDR_RULE_SCOPE
:
1450 /* Rule 2: Prefer appropriate scope
1455 * ---+--+-+---> scope
1457 * | d is scope of the destination.
1459 * | \ <- smaller scope is better if
1460 * B-15 | \ if scope is enough for destination.
1461 * | ret = B - scope (-1 <= scope >= d <= 15).
1463 * |/ <- greater is better
1464 * -C / if scope is not enough for destination.
1465 * /| ret = scope - C (-1 <= d < scope <= 15).
1467 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1468 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1469 * Assume B = 0 and we get C > 29.
1471 ret
= __ipv6_addr_src_scope(score
->addr_type
);
1472 if (ret
>= dst
->scope
)
1475 ret
-= 128; /* 30 is enough */
1476 score
->scopedist
= ret
;
1478 case IPV6_SADDR_RULE_PREFERRED
:
1480 /* Rule 3: Avoid deprecated and optimistic addresses */
1481 u8 avoid
= IFA_F_DEPRECATED
;
1483 if (!ipv6_use_optimistic_addr(net
, score
->ifa
->idev
))
1484 avoid
|= IFA_F_OPTIMISTIC
;
1485 ret
= ipv6_saddr_preferred(score
->addr_type
) ||
1486 !(score
->ifa
->flags
& avoid
);
1489 #ifdef CONFIG_IPV6_MIP6
1490 case IPV6_SADDR_RULE_HOA
:
1492 /* Rule 4: Prefer home address */
1493 int prefhome
= !(dst
->prefs
& IPV6_PREFER_SRC_COA
);
1494 ret
= !(score
->ifa
->flags
& IFA_F_HOMEADDRESS
) ^ prefhome
;
1498 case IPV6_SADDR_RULE_OIF
:
1499 /* Rule 5: Prefer outgoing interface */
1500 ret
= (!dst
->ifindex
||
1501 dst
->ifindex
== score
->ifa
->idev
->dev
->ifindex
);
1503 case IPV6_SADDR_RULE_LABEL
:
1504 /* Rule 6: Prefer matching label */
1505 ret
= ipv6_addr_label(net
,
1506 &score
->ifa
->addr
, score
->addr_type
,
1507 score
->ifa
->idev
->dev
->ifindex
) == dst
->label
;
1509 case IPV6_SADDR_RULE_PRIVACY
:
1511 /* Rule 7: Prefer public address
1512 * Note: prefer temporary address if use_tempaddr >= 2
1514 int preftmp
= dst
->prefs
& (IPV6_PREFER_SRC_PUBLIC
|IPV6_PREFER_SRC_TMP
) ?
1515 !!(dst
->prefs
& IPV6_PREFER_SRC_TMP
) :
1516 score
->ifa
->idev
->cnf
.use_tempaddr
>= 2;
1517 ret
= (!(score
->ifa
->flags
& IFA_F_TEMPORARY
)) ^ preftmp
;
1520 case IPV6_SADDR_RULE_ORCHID
:
1521 /* Rule 8-: Prefer ORCHID vs ORCHID or
1522 * non-ORCHID vs non-ORCHID
1524 ret
= !(ipv6_addr_orchid(&score
->ifa
->addr
) ^
1525 ipv6_addr_orchid(dst
->addr
));
1527 case IPV6_SADDR_RULE_PREFIX
:
1528 /* Rule 8: Use longest matching prefix */
1529 ret
= ipv6_addr_diff(&score
->ifa
->addr
, dst
->addr
);
1530 if (ret
> score
->ifa
->prefix_len
)
1531 ret
= score
->ifa
->prefix_len
;
1532 score
->matchlen
= ret
;
1534 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1535 case IPV6_SADDR_RULE_NOT_OPTIMISTIC
:
1536 /* Optimistic addresses still have lower precedence than other
1537 * preferred addresses.
1539 ret
= !(score
->ifa
->flags
& IFA_F_OPTIMISTIC
);
1547 __set_bit(i
, score
->scorebits
);
1553 static int __ipv6_dev_get_saddr(struct net
*net
,
1554 struct ipv6_saddr_dst
*dst
,
1555 struct inet6_dev
*idev
,
1556 struct ipv6_saddr_score
*scores
,
1559 struct ipv6_saddr_score
*score
= &scores
[1 - hiscore_idx
], *hiscore
= &scores
[hiscore_idx
];
1561 read_lock_bh(&idev
->lock
);
1562 list_for_each_entry(score
->ifa
, &idev
->addr_list
, if_list
) {
1566 * - Tentative Address (RFC2462 section 5.4)
1567 * - A tentative address is not considered
1568 * "assigned to an interface" in the traditional
1569 * sense, unless it is also flagged as optimistic.
1570 * - Candidate Source Address (section 4)
1571 * - In any case, anycast addresses, multicast
1572 * addresses, and the unspecified address MUST
1573 * NOT be included in a candidate set.
1575 if ((score
->ifa
->flags
& IFA_F_TENTATIVE
) &&
1576 (!(score
->ifa
->flags
& IFA_F_OPTIMISTIC
)))
1579 score
->addr_type
= __ipv6_addr_type(&score
->ifa
->addr
);
1581 if (unlikely(score
->addr_type
== IPV6_ADDR_ANY
||
1582 score
->addr_type
& IPV6_ADDR_MULTICAST
)) {
1583 net_dbg_ratelimited("ADDRCONF: unspecified / multicast address assigned as unicast address on %s",
1589 bitmap_zero(score
->scorebits
, IPV6_SADDR_RULE_MAX
);
1591 for (i
= 0; i
< IPV6_SADDR_RULE_MAX
; i
++) {
1592 int minihiscore
, miniscore
;
1594 minihiscore
= ipv6_get_saddr_eval(net
, hiscore
, dst
, i
);
1595 miniscore
= ipv6_get_saddr_eval(net
, score
, dst
, i
);
1597 if (minihiscore
> miniscore
) {
1598 if (i
== IPV6_SADDR_RULE_SCOPE
&&
1599 score
->scopedist
> 0) {
1602 * each remaining entry
1603 * has too small (not enough)
1604 * scope, because ifa entries
1605 * are sorted by their scope
1611 } else if (minihiscore
< miniscore
) {
1613 in6_ifa_put(hiscore
->ifa
);
1615 in6_ifa_hold(score
->ifa
);
1617 swap(hiscore
, score
);
1618 hiscore_idx
= 1 - hiscore_idx
;
1620 /* restore our iterator */
1621 score
->ifa
= hiscore
->ifa
;
1628 read_unlock_bh(&idev
->lock
);
1632 static int ipv6_get_saddr_master(struct net
*net
,
1633 const struct net_device
*dst_dev
,
1634 const struct net_device
*master
,
1635 struct ipv6_saddr_dst
*dst
,
1636 struct ipv6_saddr_score
*scores
,
1639 struct inet6_dev
*idev
;
1641 idev
= __in6_dev_get(dst_dev
);
1643 hiscore_idx
= __ipv6_dev_get_saddr(net
, dst
, idev
,
1644 scores
, hiscore_idx
);
1646 idev
= __in6_dev_get(master
);
1648 hiscore_idx
= __ipv6_dev_get_saddr(net
, dst
, idev
,
1649 scores
, hiscore_idx
);
1654 int ipv6_dev_get_saddr(struct net
*net
, const struct net_device
*dst_dev
,
1655 const struct in6_addr
*daddr
, unsigned int prefs
,
1656 struct in6_addr
*saddr
)
1658 struct ipv6_saddr_score scores
[2], *hiscore
;
1659 struct ipv6_saddr_dst dst
;
1660 struct inet6_dev
*idev
;
1661 struct net_device
*dev
;
1663 bool use_oif_addr
= false;
1664 int hiscore_idx
= 0;
1666 dst_type
= __ipv6_addr_type(daddr
);
1668 dst
.ifindex
= dst_dev
? dst_dev
->ifindex
: 0;
1669 dst
.scope
= __ipv6_addr_src_scope(dst_type
);
1670 dst
.label
= ipv6_addr_label(net
, daddr
, dst_type
, dst
.ifindex
);
1673 scores
[hiscore_idx
].rule
= -1;
1674 scores
[hiscore_idx
].ifa
= NULL
;
1678 /* Candidate Source Address (section 4)
1679 * - multicast and link-local destination address,
1680 * the set of candidate source address MUST only
1681 * include addresses assigned to interfaces
1682 * belonging to the same link as the outgoing
1684 * (- For site-local destination addresses, the
1685 * set of candidate source addresses MUST only
1686 * include addresses assigned to interfaces
1687 * belonging to the same site as the outgoing
1689 * - "It is RECOMMENDED that the candidate source addresses
1690 * be the set of unicast addresses assigned to the
1691 * interface that will be used to send to the destination
1692 * (the 'outgoing' interface)." (RFC 6724)
1695 idev
= __in6_dev_get(dst_dev
);
1696 if ((dst_type
& IPV6_ADDR_MULTICAST
) ||
1697 dst
.scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
||
1698 (idev
&& idev
->cnf
.use_oif_addrs_only
)) {
1699 use_oif_addr
= true;
1705 hiscore_idx
= __ipv6_dev_get_saddr(net
, &dst
, idev
, scores
, hiscore_idx
);
1707 const struct net_device
*master
;
1710 /* if dst_dev exists and is enslaved to an L3 device, then
1711 * prefer addresses from dst_dev and then the master over
1712 * any other enslaved devices in the L3 domain.
1714 master
= l3mdev_master_dev_rcu(dst_dev
);
1716 master_idx
= master
->ifindex
;
1718 hiscore_idx
= ipv6_get_saddr_master(net
, dst_dev
,
1720 scores
, hiscore_idx
);
1722 if (scores
[hiscore_idx
].ifa
)
1726 for_each_netdev_rcu(net
, dev
) {
1727 /* only consider addresses on devices in the
1730 if (l3mdev_master_ifindex_rcu(dev
) != master_idx
)
1732 idev
= __in6_dev_get(dev
);
1735 hiscore_idx
= __ipv6_dev_get_saddr(net
, &dst
, idev
, scores
, hiscore_idx
);
1742 hiscore
= &scores
[hiscore_idx
];
1744 return -EADDRNOTAVAIL
;
1746 *saddr
= hiscore
->ifa
->addr
;
1747 in6_ifa_put(hiscore
->ifa
);
1750 EXPORT_SYMBOL(ipv6_dev_get_saddr
);
1752 int __ipv6_get_lladdr(struct inet6_dev
*idev
, struct in6_addr
*addr
,
1755 struct inet6_ifaddr
*ifp
;
1756 int err
= -EADDRNOTAVAIL
;
1758 list_for_each_entry_reverse(ifp
, &idev
->addr_list
, if_list
) {
1759 if (ifp
->scope
> IFA_LINK
)
1761 if (ifp
->scope
== IFA_LINK
&&
1762 !(ifp
->flags
& banned_flags
)) {
1771 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1774 struct inet6_dev
*idev
;
1775 int err
= -EADDRNOTAVAIL
;
1778 idev
= __in6_dev_get(dev
);
1780 read_lock_bh(&idev
->lock
);
1781 err
= __ipv6_get_lladdr(idev
, addr
, banned_flags
);
1782 read_unlock_bh(&idev
->lock
);
1788 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1791 struct inet6_ifaddr
*ifp
;
1793 read_lock_bh(&idev
->lock
);
1794 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
)
1796 read_unlock_bh(&idev
->lock
);
1800 int ipv6_chk_addr(struct net
*net
, const struct in6_addr
*addr
,
1801 const struct net_device
*dev
, int strict
)
1803 return ipv6_chk_addr_and_flags(net
, addr
, dev
, strict
, IFA_F_TENTATIVE
);
1805 EXPORT_SYMBOL(ipv6_chk_addr
);
1807 int ipv6_chk_addr_and_flags(struct net
*net
, const struct in6_addr
*addr
,
1808 const struct net_device
*dev
, int strict
,
1811 struct inet6_ifaddr
*ifp
;
1812 unsigned int hash
= inet6_addr_hash(addr
);
1816 hlist_for_each_entry_rcu(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1817 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1819 /* Decouple optimistic from tentative for evaluation here.
1820 * Ban optimistic addresses explicitly, when required.
1822 ifp_flags
= (ifp
->flags
&IFA_F_OPTIMISTIC
)
1823 ? (ifp
->flags
&~IFA_F_TENTATIVE
)
1825 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1826 !(ifp_flags
&banned_flags
) &&
1827 (!dev
|| ifp
->idev
->dev
== dev
||
1828 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))) {
1829 rcu_read_unlock_bh();
1834 rcu_read_unlock_bh();
1837 EXPORT_SYMBOL(ipv6_chk_addr_and_flags
);
1839 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
1840 struct net_device
*dev
)
1842 unsigned int hash
= inet6_addr_hash(addr
);
1843 struct inet6_ifaddr
*ifp
;
1845 hlist_for_each_entry(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1846 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1848 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1849 if (!dev
|| ifp
->idev
->dev
== dev
)
1856 /* Compares an address/prefix_len with addresses on device @dev.
1857 * If one is found it returns true.
1859 bool ipv6_chk_custom_prefix(const struct in6_addr
*addr
,
1860 const unsigned int prefix_len
, struct net_device
*dev
)
1862 struct inet6_dev
*idev
;
1863 struct inet6_ifaddr
*ifa
;
1867 idev
= __in6_dev_get(dev
);
1869 read_lock_bh(&idev
->lock
);
1870 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
1871 ret
= ipv6_prefix_equal(addr
, &ifa
->addr
, prefix_len
);
1875 read_unlock_bh(&idev
->lock
);
1881 EXPORT_SYMBOL(ipv6_chk_custom_prefix
);
1883 int ipv6_chk_prefix(const struct in6_addr
*addr
, struct net_device
*dev
)
1885 struct inet6_dev
*idev
;
1886 struct inet6_ifaddr
*ifa
;
1891 idev
= __in6_dev_get(dev
);
1893 read_lock_bh(&idev
->lock
);
1894 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
1895 onlink
= ipv6_prefix_equal(addr
, &ifa
->addr
,
1900 read_unlock_bh(&idev
->lock
);
1905 EXPORT_SYMBOL(ipv6_chk_prefix
);
1907 struct inet6_ifaddr
*ipv6_get_ifaddr(struct net
*net
, const struct in6_addr
*addr
,
1908 struct net_device
*dev
, int strict
)
1910 struct inet6_ifaddr
*ifp
, *result
= NULL
;
1911 unsigned int hash
= inet6_addr_hash(addr
);
1914 hlist_for_each_entry_rcu_bh(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1915 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1917 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1918 if (!dev
|| ifp
->idev
->dev
== dev
||
1919 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1926 rcu_read_unlock_bh();
1931 /* Gets referenced address, destroys ifaddr */
1933 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
, int dad_failed
)
1936 ifp
->flags
|= IFA_F_DADFAILED
;
1938 if (ifp
->flags
&IFA_F_TEMPORARY
) {
1939 struct inet6_ifaddr
*ifpub
;
1940 spin_lock_bh(&ifp
->lock
);
1943 in6_ifa_hold(ifpub
);
1944 spin_unlock_bh(&ifp
->lock
);
1945 ipv6_create_tempaddr(ifpub
, ifp
);
1948 spin_unlock_bh(&ifp
->lock
);
1951 } else if (ifp
->flags
&IFA_F_PERMANENT
|| !dad_failed
) {
1952 spin_lock_bh(&ifp
->lock
);
1953 addrconf_del_dad_work(ifp
);
1954 ifp
->flags
|= IFA_F_TENTATIVE
;
1955 spin_unlock_bh(&ifp
->lock
);
1957 ipv6_ifa_notify(0, ifp
);
1964 static int addrconf_dad_end(struct inet6_ifaddr
*ifp
)
1968 spin_lock_bh(&ifp
->lock
);
1969 if (ifp
->state
== INET6_IFADDR_STATE_DAD
) {
1970 ifp
->state
= INET6_IFADDR_STATE_POSTDAD
;
1973 spin_unlock_bh(&ifp
->lock
);
1978 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1980 struct inet6_dev
*idev
= ifp
->idev
;
1981 struct net
*net
= dev_net(ifp
->idev
->dev
);
1983 if (addrconf_dad_end(ifp
)) {
1988 net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n",
1989 ifp
->idev
->dev
->name
, &ifp
->addr
);
1991 spin_lock_bh(&ifp
->lock
);
1993 if (ifp
->flags
& IFA_F_STABLE_PRIVACY
) {
1994 int scope
= ifp
->scope
;
1995 u32 flags
= ifp
->flags
;
1996 struct in6_addr new_addr
;
1997 struct inet6_ifaddr
*ifp2
;
1998 u32 valid_lft
, preferred_lft
;
1999 int pfxlen
= ifp
->prefix_len
;
2000 int retries
= ifp
->stable_privacy_retry
+ 1;
2002 if (retries
> net
->ipv6
.sysctl
.idgen_retries
) {
2003 net_info_ratelimited("%s: privacy stable address generation failed because of DAD conflicts!\n",
2004 ifp
->idev
->dev
->name
);
2008 new_addr
= ifp
->addr
;
2009 if (ipv6_generate_stable_address(&new_addr
, retries
,
2013 valid_lft
= ifp
->valid_lft
;
2014 preferred_lft
= ifp
->prefered_lft
;
2016 spin_unlock_bh(&ifp
->lock
);
2018 if (idev
->cnf
.max_addresses
&&
2019 ipv6_count_addresses(idev
) >=
2020 idev
->cnf
.max_addresses
)
2023 net_info_ratelimited("%s: generating new stable privacy address because of DAD conflict\n",
2024 ifp
->idev
->dev
->name
);
2026 ifp2
= ipv6_add_addr(idev
, &new_addr
, NULL
, pfxlen
,
2027 scope
, flags
, valid_lft
,
2032 spin_lock_bh(&ifp2
->lock
);
2033 ifp2
->stable_privacy_retry
= retries
;
2034 ifp2
->state
= INET6_IFADDR_STATE_PREDAD
;
2035 spin_unlock_bh(&ifp2
->lock
);
2037 addrconf_mod_dad_work(ifp2
, net
->ipv6
.sysctl
.idgen_delay
);
2040 spin_lock_bh(&ifp
->lock
);
2044 /* transition from _POSTDAD to _ERRDAD */
2045 ifp
->state
= INET6_IFADDR_STATE_ERRDAD
;
2046 spin_unlock_bh(&ifp
->lock
);
2048 addrconf_mod_dad_work(ifp
, 0);
2052 /* Join to solicited addr multicast group.
2053 * caller must hold RTNL */
2054 void addrconf_join_solict(struct net_device
*dev
, const struct in6_addr
*addr
)
2056 struct in6_addr maddr
;
2058 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
2061 addrconf_addr_solict_mult(addr
, &maddr
);
2062 ipv6_dev_mc_inc(dev
, &maddr
);
2065 /* caller must hold RTNL */
2066 void addrconf_leave_solict(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
2068 struct in6_addr maddr
;
2070 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
2073 addrconf_addr_solict_mult(addr
, &maddr
);
2074 __ipv6_dev_mc_dec(idev
, &maddr
);
2077 /* caller must hold RTNL */
2078 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
2080 struct in6_addr addr
;
2082 if (ifp
->prefix_len
>= 127) /* RFC 6164 */
2084 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
2085 if (ipv6_addr_any(&addr
))
2087 __ipv6_dev_ac_inc(ifp
->idev
, &addr
);
2090 /* caller must hold RTNL */
2091 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
2093 struct in6_addr addr
;
2095 if (ifp
->prefix_len
>= 127) /* RFC 6164 */
2097 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
2098 if (ipv6_addr_any(&addr
))
2100 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
2103 static int addrconf_ifid_6lowpan(u8
*eui
, struct net_device
*dev
)
2105 switch (dev
->addr_len
) {
2107 memcpy(eui
, dev
->dev_addr
, 3);
2110 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
2112 case EUI64_ADDR_LEN
:
2113 memcpy(eui
, dev
->dev_addr
, EUI64_ADDR_LEN
);
2123 static int addrconf_ifid_ieee1394(u8
*eui
, struct net_device
*dev
)
2125 union fwnet_hwaddr
*ha
;
2127 if (dev
->addr_len
!= FWNET_ALEN
)
2130 ha
= (union fwnet_hwaddr
*)dev
->dev_addr
;
2132 memcpy(eui
, &ha
->uc
.uniq_id
, sizeof(ha
->uc
.uniq_id
));
2137 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
2139 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
2140 if (dev
->addr_len
!= ARCNET_ALEN
)
2143 eui
[7] = *(u8
*)dev
->dev_addr
;
2147 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
2149 if (dev
->addr_len
!= INFINIBAND_ALEN
)
2151 memcpy(eui
, dev
->dev_addr
+ 12, 8);
2156 static int __ipv6_isatap_ifid(u8
*eui
, __be32 addr
)
2160 eui
[0] = (ipv4_is_zeronet(addr
) || ipv4_is_private_10(addr
) ||
2161 ipv4_is_loopback(addr
) || ipv4_is_linklocal_169(addr
) ||
2162 ipv4_is_private_172(addr
) || ipv4_is_test_192(addr
) ||
2163 ipv4_is_anycast_6to4(addr
) || ipv4_is_private_192(addr
) ||
2164 ipv4_is_test_198(addr
) || ipv4_is_multicast(addr
) ||
2165 ipv4_is_lbcast(addr
)) ? 0x00 : 0x02;
2169 memcpy(eui
+ 4, &addr
, 4);
2173 static int addrconf_ifid_sit(u8
*eui
, struct net_device
*dev
)
2175 if (dev
->priv_flags
& IFF_ISATAP
)
2176 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
2180 static int addrconf_ifid_gre(u8
*eui
, struct net_device
*dev
)
2182 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
2185 static int addrconf_ifid_ip6tnl(u8
*eui
, struct net_device
*dev
)
2187 memcpy(eui
, dev
->perm_addr
, 3);
2188 memcpy(eui
+ 5, dev
->perm_addr
+ 3, 3);
2195 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
2197 switch (dev
->type
) {
2200 return addrconf_ifid_eui48(eui
, dev
);
2202 return addrconf_ifid_arcnet(eui
, dev
);
2203 case ARPHRD_INFINIBAND
:
2204 return addrconf_ifid_infiniband(eui
, dev
);
2206 return addrconf_ifid_sit(eui
, dev
);
2209 return addrconf_ifid_gre(eui
, dev
);
2210 case ARPHRD_6LOWPAN
:
2211 return addrconf_ifid_6lowpan(eui
, dev
);
2212 case ARPHRD_IEEE1394
:
2213 return addrconf_ifid_ieee1394(eui
, dev
);
2214 case ARPHRD_TUNNEL6
:
2216 return addrconf_ifid_ip6tnl(eui
, dev
);
2221 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
2224 struct inet6_ifaddr
*ifp
;
2226 read_lock_bh(&idev
->lock
);
2227 list_for_each_entry_reverse(ifp
, &idev
->addr_list
, if_list
) {
2228 if (ifp
->scope
> IFA_LINK
)
2230 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2231 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
2236 read_unlock_bh(&idev
->lock
);
2240 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
2241 static void ipv6_regen_rndid(struct inet6_dev
*idev
)
2244 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
2245 idev
->rndid
[0] &= ~0x02;
2248 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
2249 * check if generated address is not inappropriate
2251 * - Reserved subnet anycast (RFC 2526)
2252 * 11111101 11....11 1xxxxxxx
2253 * - ISATAP (RFC4214) 6.1
2254 * 00-00-5E-FE-xx-xx-xx-xx
2256 * - XXX: already assigned to an address on the device
2258 if (idev
->rndid
[0] == 0xfd &&
2259 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
2260 (idev
->rndid
[7]&0x80))
2262 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
2263 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
2265 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
2270 static void ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
)
2272 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
2273 ipv6_regen_rndid(idev
);
2281 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
2282 unsigned long expires
, u32 flags
)
2284 struct fib6_config cfg
= {
2285 .fc_table
= l3mdev_fib_table(dev
) ? : RT6_TABLE_PREFIX
,
2286 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
2287 .fc_ifindex
= dev
->ifindex
,
2288 .fc_expires
= expires
,
2290 .fc_flags
= RTF_UP
| flags
,
2291 .fc_nlinfo
.nl_net
= dev_net(dev
),
2292 .fc_protocol
= RTPROT_KERNEL
,
2297 /* Prevent useless cloning on PtP SIT.
2298 This thing is done here expecting that the whole
2299 class of non-broadcast devices need not cloning.
2301 #if IS_ENABLED(CONFIG_IPV6_SIT)
2302 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
2303 cfg
.fc_flags
|= RTF_NONEXTHOP
;
2306 ip6_route_add(&cfg
, NULL
);
2310 static struct rt6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
2312 const struct net_device
*dev
,
2313 u32 flags
, u32 noflags
)
2315 struct fib6_node
*fn
;
2316 struct rt6_info
*rt
= NULL
;
2317 struct fib6_table
*table
;
2318 u32 tb_id
= l3mdev_fib_table(dev
) ? : RT6_TABLE_PREFIX
;
2320 table
= fib6_get_table(dev_net(dev
), tb_id
);
2324 read_lock_bh(&table
->tb6_lock
);
2325 fn
= fib6_locate(&table
->tb6_root
, pfx
, plen
, NULL
, 0);
2329 noflags
|= RTF_CACHE
;
2330 for (rt
= fn
->leaf
; rt
; rt
= rt
->dst
.rt6_next
) {
2331 if (rt
->dst
.dev
->ifindex
!= dev
->ifindex
)
2333 if ((rt
->rt6i_flags
& flags
) != flags
)
2335 if ((rt
->rt6i_flags
& noflags
) != 0)
2341 read_unlock_bh(&table
->tb6_lock
);
2346 /* Create "default" multicast route to the interface */
2348 static void addrconf_add_mroute(struct net_device
*dev
)
2350 struct fib6_config cfg
= {
2351 .fc_table
= l3mdev_fib_table(dev
) ? : RT6_TABLE_LOCAL
,
2352 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
2353 .fc_ifindex
= dev
->ifindex
,
2356 .fc_nlinfo
.nl_net
= dev_net(dev
),
2359 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
2361 ip6_route_add(&cfg
, NULL
);
2364 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
2366 struct inet6_dev
*idev
;
2370 idev
= ipv6_find_idev(dev
);
2372 return ERR_PTR(-ENOBUFS
);
2374 if (idev
->cnf
.disable_ipv6
)
2375 return ERR_PTR(-EACCES
);
2377 /* Add default multicast route */
2378 if (!(dev
->flags
& IFF_LOOPBACK
) && !netif_is_l3_master(dev
))
2379 addrconf_add_mroute(dev
);
2384 static void manage_tempaddrs(struct inet6_dev
*idev
,
2385 struct inet6_ifaddr
*ifp
,
2386 __u32 valid_lft
, __u32 prefered_lft
,
2387 bool create
, unsigned long now
)
2390 struct inet6_ifaddr
*ift
;
2392 read_lock_bh(&idev
->lock
);
2393 /* update all temporary addresses in the list */
2394 list_for_each_entry(ift
, &idev
->tempaddr_list
, tmp_list
) {
2395 int age
, max_valid
, max_prefered
;
2397 if (ifp
!= ift
->ifpub
)
2400 /* RFC 4941 section 3.3:
2401 * If a received option will extend the lifetime of a public
2402 * address, the lifetimes of temporary addresses should
2403 * be extended, subject to the overall constraint that no
2404 * temporary addresses should ever remain "valid" or "preferred"
2405 * for a time longer than (TEMP_VALID_LIFETIME) or
2406 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), respectively.
2408 age
= (now
- ift
->cstamp
) / HZ
;
2409 max_valid
= idev
->cnf
.temp_valid_lft
- age
;
2413 max_prefered
= idev
->cnf
.temp_prefered_lft
-
2414 idev
->desync_factor
- age
;
2415 if (max_prefered
< 0)
2418 if (valid_lft
> max_valid
)
2419 valid_lft
= max_valid
;
2421 if (prefered_lft
> max_prefered
)
2422 prefered_lft
= max_prefered
;
2424 spin_lock(&ift
->lock
);
2426 ift
->valid_lft
= valid_lft
;
2427 ift
->prefered_lft
= prefered_lft
;
2429 if (prefered_lft
> 0)
2430 ift
->flags
&= ~IFA_F_DEPRECATED
;
2432 spin_unlock(&ift
->lock
);
2433 if (!(flags
&IFA_F_TENTATIVE
))
2434 ipv6_ifa_notify(0, ift
);
2437 if ((create
|| list_empty(&idev
->tempaddr_list
)) &&
2438 idev
->cnf
.use_tempaddr
> 0) {
2439 /* When a new public address is created as described
2440 * in [ADDRCONF], also create a new temporary address.
2441 * Also create a temporary address if it's enabled but
2442 * no temporary address currently exists.
2444 read_unlock_bh(&idev
->lock
);
2445 ipv6_create_tempaddr(ifp
, NULL
);
2447 read_unlock_bh(&idev
->lock
);
2451 static bool is_addr_mode_generate_stable(struct inet6_dev
*idev
)
2453 return idev
->cnf
.addr_gen_mode
== IN6_ADDR_GEN_MODE_STABLE_PRIVACY
||
2454 idev
->cnf
.addr_gen_mode
== IN6_ADDR_GEN_MODE_RANDOM
;
2457 int addrconf_prefix_rcv_add_addr(struct net
*net
, struct net_device
*dev
,
2458 const struct prefix_info
*pinfo
,
2459 struct inet6_dev
*in6_dev
,
2460 const struct in6_addr
*addr
, int addr_type
,
2461 u32 addr_flags
, bool sllao
, bool tokenized
,
2462 __u32 valid_lft
, u32 prefered_lft
)
2464 struct inet6_ifaddr
*ifp
= ipv6_get_ifaddr(net
, addr
, dev
, 1);
2465 int create
= 0, update_lft
= 0;
2467 if (!ifp
&& valid_lft
) {
2468 int max_addresses
= in6_dev
->cnf
.max_addresses
;
2470 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2471 if ((net
->ipv6
.devconf_all
->optimistic_dad
||
2472 in6_dev
->cnf
.optimistic_dad
) &&
2473 !net
->ipv6
.devconf_all
->forwarding
&& sllao
)
2474 addr_flags
|= IFA_F_OPTIMISTIC
;
2477 /* Do not allow to create too much of autoconfigured
2478 * addresses; this would be too easy way to crash kernel.
2480 if (!max_addresses
||
2481 ipv6_count_addresses(in6_dev
) < max_addresses
)
2482 ifp
= ipv6_add_addr(in6_dev
, addr
, NULL
,
2484 addr_type
&IPV6_ADDR_SCOPE_MASK
,
2485 addr_flags
, valid_lft
,
2488 if (IS_ERR_OR_NULL(ifp
))
2493 spin_lock_bh(&ifp
->lock
);
2494 ifp
->flags
|= IFA_F_MANAGETEMPADDR
;
2495 ifp
->cstamp
= jiffies
;
2496 ifp
->tokenized
= tokenized
;
2497 spin_unlock_bh(&ifp
->lock
);
2498 addrconf_dad_start(ifp
);
2506 /* update lifetime (RFC2462 5.5.3 e) */
2507 spin_lock_bh(&ifp
->lock
);
2509 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
2510 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
2513 if (!update_lft
&& !create
&& stored_lft
) {
2514 const u32 minimum_lft
= min_t(u32
,
2515 stored_lft
, MIN_VALID_LIFETIME
);
2516 valid_lft
= max(valid_lft
, minimum_lft
);
2518 /* RFC4862 Section 5.5.3e:
2519 * "Note that the preferred lifetime of the
2520 * corresponding address is always reset to
2521 * the Preferred Lifetime in the received
2522 * Prefix Information option, regardless of
2523 * whether the valid lifetime is also reset or
2526 * So we should always update prefered_lft here.
2532 ifp
->valid_lft
= valid_lft
;
2533 ifp
->prefered_lft
= prefered_lft
;
2536 ifp
->flags
&= ~IFA_F_DEPRECATED
;
2537 spin_unlock_bh(&ifp
->lock
);
2539 if (!(flags
&IFA_F_TENTATIVE
))
2540 ipv6_ifa_notify(0, ifp
);
2542 spin_unlock_bh(&ifp
->lock
);
2544 manage_tempaddrs(in6_dev
, ifp
, valid_lft
, prefered_lft
,
2553 EXPORT_SYMBOL_GPL(addrconf_prefix_rcv_add_addr
);
2555 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
, bool sllao
)
2557 struct prefix_info
*pinfo
;
2562 struct inet6_dev
*in6_dev
;
2563 struct net
*net
= dev_net(dev
);
2565 pinfo
= (struct prefix_info
*) opt
;
2567 if (len
< sizeof(struct prefix_info
)) {
2568 ADBG("addrconf: prefix option too short\n");
2573 * Validation checks ([ADDRCONF], page 19)
2576 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
2578 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
2581 valid_lft
= ntohl(pinfo
->valid
);
2582 prefered_lft
= ntohl(pinfo
->prefered
);
2584 if (prefered_lft
> valid_lft
) {
2585 net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n");
2589 in6_dev
= in6_dev_get(dev
);
2592 net_dbg_ratelimited("addrconf: device %s not configured\n",
2598 * Two things going on here:
2599 * 1) Add routes for on-link prefixes
2600 * 2) Configure prefixes with the auto flag set
2603 if (pinfo
->onlink
) {
2604 struct rt6_info
*rt
;
2605 unsigned long rt_expires
;
2607 /* Avoid arithmetic overflow. Really, we could
2608 * save rt_expires in seconds, likely valid_lft,
2609 * but it would require division in fib gc, that it
2613 rt_expires
= addrconf_timeout_fixup(valid_lft
, HZ
);
2615 rt_expires
= addrconf_timeout_fixup(valid_lft
, USER_HZ
);
2617 if (addrconf_finite_timeout(rt_expires
))
2620 rt
= addrconf_get_prefix_route(&pinfo
->prefix
,
2623 RTF_ADDRCONF
| RTF_PREFIX_RT
,
2624 RTF_GATEWAY
| RTF_DEFAULT
);
2627 /* Autoconf prefix route */
2628 if (valid_lft
== 0) {
2631 } else if (addrconf_finite_timeout(rt_expires
)) {
2633 rt6_set_expires(rt
, jiffies
+ rt_expires
);
2635 rt6_clean_expires(rt
);
2637 } else if (valid_lft
) {
2638 clock_t expires
= 0;
2639 int flags
= RTF_ADDRCONF
| RTF_PREFIX_RT
;
2640 if (addrconf_finite_timeout(rt_expires
)) {
2642 flags
|= RTF_EXPIRES
;
2643 expires
= jiffies_to_clock_t(rt_expires
);
2645 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
2646 dev
, expires
, flags
);
2651 /* Try to figure out our local address for this prefix */
2653 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
2654 struct in6_addr addr
;
2655 bool tokenized
= false, dev_addr_generated
= false;
2657 if (pinfo
->prefix_len
== 64) {
2658 memcpy(&addr
, &pinfo
->prefix
, 8);
2660 if (!ipv6_addr_any(&in6_dev
->token
)) {
2661 read_lock_bh(&in6_dev
->lock
);
2662 memcpy(addr
.s6_addr
+ 8,
2663 in6_dev
->token
.s6_addr
+ 8, 8);
2664 read_unlock_bh(&in6_dev
->lock
);
2666 } else if (is_addr_mode_generate_stable(in6_dev
) &&
2667 !ipv6_generate_stable_address(&addr
, 0,
2669 addr_flags
|= IFA_F_STABLE_PRIVACY
;
2671 } else if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
2672 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
2675 dev_addr_generated
= true;
2679 net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n",
2684 err
= addrconf_prefix_rcv_add_addr(net
, dev
, pinfo
, in6_dev
,
2687 tokenized
, valid_lft
,
2692 /* Ignore error case here because previous prefix add addr was
2693 * successful which will be notified.
2695 ndisc_ops_prefix_rcv_add_addr(net
, dev
, pinfo
, in6_dev
, &addr
,
2696 addr_type
, addr_flags
, sllao
,
2697 tokenized
, valid_lft
,
2699 dev_addr_generated
);
2701 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
2703 in6_dev_put(in6_dev
);
2707 * Set destination address.
2708 * Special case for SIT interfaces where we create a new "virtual"
2711 int addrconf_set_dstaddr(struct net
*net
, void __user
*arg
)
2713 struct in6_ifreq ireq
;
2714 struct net_device
*dev
;
2720 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2723 dev
= __dev_get_by_index(net
, ireq
.ifr6_ifindex
);
2729 #if IS_ENABLED(CONFIG_IPV6_SIT)
2730 if (dev
->type
== ARPHRD_SIT
) {
2731 const struct net_device_ops
*ops
= dev
->netdev_ops
;
2733 struct ip_tunnel_parm p
;
2735 err
= -EADDRNOTAVAIL
;
2736 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
2739 memset(&p
, 0, sizeof(p
));
2740 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
2744 p
.iph
.protocol
= IPPROTO_IPV6
;
2746 ifr
.ifr_ifru
.ifru_data
= (__force
void __user
*)&p
;
2748 if (ops
->ndo_do_ioctl
) {
2749 mm_segment_t oldfs
= get_fs();
2752 err
= ops
->ndo_do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
2759 dev
= __dev_get_by_name(net
, p
.name
);
2762 err
= dev_open(dev
);
2772 static int ipv6_mc_config(struct sock
*sk
, bool join
,
2773 const struct in6_addr
*addr
, int ifindex
)
2781 ret
= ipv6_sock_mc_join(sk
, ifindex
, addr
);
2783 ret
= ipv6_sock_mc_drop(sk
, ifindex
, addr
);
2790 * Manual configuration of address on an interface
2792 static int inet6_addr_add(struct net
*net
, int ifindex
,
2793 const struct in6_addr
*pfx
,
2794 const struct in6_addr
*peer_pfx
,
2795 unsigned int plen
, __u32 ifa_flags
,
2796 __u32 prefered_lft
, __u32 valid_lft
)
2798 struct inet6_ifaddr
*ifp
;
2799 struct inet6_dev
*idev
;
2800 struct net_device
*dev
;
2801 unsigned long timeout
;
2811 /* check the lifetime */
2812 if (!valid_lft
|| prefered_lft
> valid_lft
)
2815 if (ifa_flags
& IFA_F_MANAGETEMPADDR
&& plen
!= 64)
2818 dev
= __dev_get_by_index(net
, ifindex
);
2822 idev
= addrconf_add_dev(dev
);
2824 return PTR_ERR(idev
);
2826 if (ifa_flags
& IFA_F_MCAUTOJOIN
) {
2827 int ret
= ipv6_mc_config(net
->ipv6
.mc_autojoin_sk
,
2828 true, pfx
, ifindex
);
2834 scope
= ipv6_addr_scope(pfx
);
2836 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
2837 if (addrconf_finite_timeout(timeout
)) {
2838 expires
= jiffies_to_clock_t(timeout
* HZ
);
2839 valid_lft
= timeout
;
2840 flags
= RTF_EXPIRES
;
2844 ifa_flags
|= IFA_F_PERMANENT
;
2847 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
2848 if (addrconf_finite_timeout(timeout
)) {
2850 ifa_flags
|= IFA_F_DEPRECATED
;
2851 prefered_lft
= timeout
;
2854 ifp
= ipv6_add_addr(idev
, pfx
, peer_pfx
, plen
, scope
, ifa_flags
,
2855 valid_lft
, prefered_lft
);
2858 if (!(ifa_flags
& IFA_F_NOPREFIXROUTE
)) {
2859 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
2864 * Note that section 3.1 of RFC 4429 indicates
2865 * that the Optimistic flag should not be set for
2866 * manually configured addresses
2868 addrconf_dad_start(ifp
);
2869 if (ifa_flags
& IFA_F_MANAGETEMPADDR
)
2870 manage_tempaddrs(idev
, ifp
, valid_lft
, prefered_lft
,
2873 addrconf_verify_rtnl();
2875 } else if (ifa_flags
& IFA_F_MCAUTOJOIN
) {
2876 ipv6_mc_config(net
->ipv6
.mc_autojoin_sk
,
2877 false, pfx
, ifindex
);
2880 return PTR_ERR(ifp
);
2883 static int inet6_addr_del(struct net
*net
, int ifindex
, u32 ifa_flags
,
2884 const struct in6_addr
*pfx
, unsigned int plen
)
2886 struct inet6_ifaddr
*ifp
;
2887 struct inet6_dev
*idev
;
2888 struct net_device
*dev
;
2893 dev
= __dev_get_by_index(net
, ifindex
);
2897 idev
= __in6_dev_get(dev
);
2901 read_lock_bh(&idev
->lock
);
2902 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
2903 if (ifp
->prefix_len
== plen
&&
2904 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
2906 read_unlock_bh(&idev
->lock
);
2908 if (!(ifp
->flags
& IFA_F_TEMPORARY
) &&
2909 (ifa_flags
& IFA_F_MANAGETEMPADDR
))
2910 manage_tempaddrs(idev
, ifp
, 0, 0, false,
2913 addrconf_verify_rtnl();
2914 if (ipv6_addr_is_multicast(pfx
)) {
2915 ipv6_mc_config(net
->ipv6
.mc_autojoin_sk
,
2916 false, pfx
, dev
->ifindex
);
2921 read_unlock_bh(&idev
->lock
);
2922 return -EADDRNOTAVAIL
;
2926 int addrconf_add_ifaddr(struct net
*net
, void __user
*arg
)
2928 struct in6_ifreq ireq
;
2931 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
2934 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2938 err
= inet6_addr_add(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, NULL
,
2939 ireq
.ifr6_prefixlen
, IFA_F_PERMANENT
,
2940 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2945 int addrconf_del_ifaddr(struct net
*net
, void __user
*arg
)
2947 struct in6_ifreq ireq
;
2950 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
2953 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2957 err
= inet6_addr_del(net
, ireq
.ifr6_ifindex
, 0, &ireq
.ifr6_addr
,
2958 ireq
.ifr6_prefixlen
);
2963 static void add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
2964 int plen
, int scope
)
2966 struct inet6_ifaddr
*ifp
;
2968 ifp
= ipv6_add_addr(idev
, addr
, NULL
, plen
,
2969 scope
, IFA_F_PERMANENT
,
2970 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2972 spin_lock_bh(&ifp
->lock
);
2973 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2974 spin_unlock_bh(&ifp
->lock
);
2975 rt_genid_bump_ipv6(dev_net(idev
->dev
));
2976 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2981 #if IS_ENABLED(CONFIG_IPV6_SIT)
2982 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
2984 struct in6_addr addr
;
2985 struct net_device
*dev
;
2986 struct net
*net
= dev_net(idev
->dev
);
2992 memset(&addr
, 0, sizeof(struct in6_addr
));
2993 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
2995 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
2996 addr
.s6_addr32
[0] = htonl(0xfe800000);
3000 scope
= IPV6_ADDR_COMPATv4
;
3002 pflags
|= RTF_NONEXTHOP
;
3005 if (addr
.s6_addr32
[3]) {
3006 add_addr(idev
, &addr
, plen
, scope
);
3007 addrconf_prefix_route(&addr
, plen
, idev
->dev
, 0, pflags
);
3011 for_each_netdev(net
, dev
) {
3012 struct in_device
*in_dev
= __in_dev_get_rtnl(dev
);
3013 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
3014 struct in_ifaddr
*ifa
;
3018 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
3020 addr
.s6_addr32
[3] = ifa
->ifa_local
;
3022 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
3024 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
3025 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
3030 add_addr(idev
, &addr
, plen
, flag
);
3031 addrconf_prefix_route(&addr
, plen
, idev
->dev
, 0,
3039 static void init_loopback(struct net_device
*dev
)
3041 struct inet6_dev
*idev
;
3047 idev
= ipv6_find_idev(dev
);
3049 pr_debug("%s: add_dev failed\n", __func__
);
3053 add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
);
3056 void addrconf_add_linklocal(struct inet6_dev
*idev
,
3057 const struct in6_addr
*addr
, u32 flags
)
3059 struct inet6_ifaddr
*ifp
;
3060 u32 addr_flags
= flags
| IFA_F_PERMANENT
;
3062 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3063 if ((dev_net(idev
->dev
)->ipv6
.devconf_all
->optimistic_dad
||
3064 idev
->cnf
.optimistic_dad
) &&
3065 !dev_net(idev
->dev
)->ipv6
.devconf_all
->forwarding
)
3066 addr_flags
|= IFA_F_OPTIMISTIC
;
3069 ifp
= ipv6_add_addr(idev
, addr
, NULL
, 64, IFA_LINK
, addr_flags
,
3070 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
3072 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
3073 addrconf_dad_start(ifp
);
3077 EXPORT_SYMBOL_GPL(addrconf_add_linklocal
);
3079 static bool ipv6_reserved_interfaceid(struct in6_addr address
)
3081 if ((address
.s6_addr32
[2] | address
.s6_addr32
[3]) == 0)
3084 if (address
.s6_addr32
[2] == htonl(0x02005eff) &&
3085 ((address
.s6_addr32
[3] & htonl(0xfe000000)) == htonl(0xfe000000)))
3088 if (address
.s6_addr32
[2] == htonl(0xfdffffff) &&
3089 ((address
.s6_addr32
[3] & htonl(0xffffff80)) == htonl(0xffffff80)))
3095 static int ipv6_generate_stable_address(struct in6_addr
*address
,
3097 const struct inet6_dev
*idev
)
3099 static DEFINE_SPINLOCK(lock
);
3100 static __u32 digest
[SHA_DIGEST_WORDS
];
3101 static __u32 workspace
[SHA_WORKSPACE_WORDS
];
3104 char __data
[SHA_MESSAGE_BYTES
];
3106 struct in6_addr secret
;
3108 unsigned char hwaddr
[MAX_ADDR_LEN
];
3113 struct in6_addr secret
;
3114 struct in6_addr temp
;
3115 struct net
*net
= dev_net(idev
->dev
);
3117 BUILD_BUG_ON(sizeof(data
.__data
) != sizeof(data
));
3119 if (idev
->cnf
.stable_secret
.initialized
)
3120 secret
= idev
->cnf
.stable_secret
.secret
;
3121 else if (net
->ipv6
.devconf_dflt
->stable_secret
.initialized
)
3122 secret
= net
->ipv6
.devconf_dflt
->stable_secret
.secret
;
3127 spin_lock_bh(&lock
);
3130 memset(&data
, 0, sizeof(data
));
3131 memset(workspace
, 0, sizeof(workspace
));
3132 memcpy(data
.hwaddr
, idev
->dev
->perm_addr
, idev
->dev
->addr_len
);
3133 data
.prefix
[0] = address
->s6_addr32
[0];
3134 data
.prefix
[1] = address
->s6_addr32
[1];
3135 data
.secret
= secret
;
3136 data
.dad_count
= dad_count
;
3138 sha_transform(digest
, data
.__data
, workspace
);
3141 temp
.s6_addr32
[2] = (__force __be32
)digest
[0];
3142 temp
.s6_addr32
[3] = (__force __be32
)digest
[1];
3144 spin_unlock_bh(&lock
);
3146 if (ipv6_reserved_interfaceid(temp
)) {
3148 if (dad_count
> dev_net(idev
->dev
)->ipv6
.sysctl
.idgen_retries
)
3157 static void ipv6_gen_mode_random_init(struct inet6_dev
*idev
)
3159 struct ipv6_stable_secret
*s
= &idev
->cnf
.stable_secret
;
3163 s
= &idev
->cnf
.stable_secret
;
3164 get_random_bytes(&s
->secret
, sizeof(s
->secret
));
3165 s
->initialized
= true;
3168 static void addrconf_addr_gen(struct inet6_dev
*idev
, bool prefix_route
)
3170 struct in6_addr addr
;
3172 /* no link local addresses on L3 master devices */
3173 if (netif_is_l3_master(idev
->dev
))
3176 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
3178 switch (idev
->cnf
.addr_gen_mode
) {
3179 case IN6_ADDR_GEN_MODE_RANDOM
:
3180 ipv6_gen_mode_random_init(idev
);
3182 case IN6_ADDR_GEN_MODE_STABLE_PRIVACY
:
3183 if (!ipv6_generate_stable_address(&addr
, 0, idev
))
3184 addrconf_add_linklocal(idev
, &addr
,
3185 IFA_F_STABLE_PRIVACY
);
3186 else if (prefix_route
)
3187 addrconf_prefix_route(&addr
, 64, idev
->dev
, 0, 0);
3189 case IN6_ADDR_GEN_MODE_EUI64
:
3190 /* addrconf_add_linklocal also adds a prefix_route and we
3191 * only need to care about prefix routes if ipv6_generate_eui64
3192 * couldn't generate one.
3194 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) == 0)
3195 addrconf_add_linklocal(idev
, &addr
, 0);
3196 else if (prefix_route
)
3197 addrconf_prefix_route(&addr
, 64, idev
->dev
, 0, 0);
3199 case IN6_ADDR_GEN_MODE_NONE
:
3201 /* will not add any link local address */
3206 static void addrconf_dev_config(struct net_device
*dev
)
3208 struct inet6_dev
*idev
;
3212 if ((dev
->type
!= ARPHRD_ETHER
) &&
3213 (dev
->type
!= ARPHRD_FDDI
) &&
3214 (dev
->type
!= ARPHRD_ARCNET
) &&
3215 (dev
->type
!= ARPHRD_INFINIBAND
) &&
3216 (dev
->type
!= ARPHRD_IEEE1394
) &&
3217 (dev
->type
!= ARPHRD_TUNNEL6
) &&
3218 (dev
->type
!= ARPHRD_6LOWPAN
) &&
3219 (dev
->type
!= ARPHRD_IP6GRE
) &&
3220 (dev
->type
!= ARPHRD_IPGRE
) &&
3221 (dev
->type
!= ARPHRD_TUNNEL
) &&
3222 (dev
->type
!= ARPHRD_NONE
)) {
3223 /* Alas, we support only Ethernet autoconfiguration. */
3227 idev
= addrconf_add_dev(dev
);
3231 /* this device type has no EUI support */
3232 if (dev
->type
== ARPHRD_NONE
&&
3233 idev
->cnf
.addr_gen_mode
== IN6_ADDR_GEN_MODE_EUI64
)
3234 idev
->cnf
.addr_gen_mode
= IN6_ADDR_GEN_MODE_RANDOM
;
3236 addrconf_addr_gen(idev
, false);
3239 #if IS_ENABLED(CONFIG_IPV6_SIT)
3240 static void addrconf_sit_config(struct net_device
*dev
)
3242 struct inet6_dev
*idev
;
3247 * Configure the tunnel with one of our IPv4
3248 * addresses... we should configure all of
3249 * our v4 addrs in the tunnel
3252 idev
= ipv6_find_idev(dev
);
3254 pr_debug("%s: add_dev failed\n", __func__
);
3258 if (dev
->priv_flags
& IFF_ISATAP
) {
3259 addrconf_addr_gen(idev
, false);
3263 sit_add_v4_addrs(idev
);
3265 if (dev
->flags
&IFF_POINTOPOINT
)
3266 addrconf_add_mroute(dev
);
3270 #if IS_ENABLED(CONFIG_NET_IPGRE)
3271 static void addrconf_gre_config(struct net_device
*dev
)
3273 struct inet6_dev
*idev
;
3277 idev
= ipv6_find_idev(dev
);
3279 pr_debug("%s: add_dev failed\n", __func__
);
3283 addrconf_addr_gen(idev
, true);
3284 if (dev
->flags
& IFF_POINTOPOINT
)
3285 addrconf_add_mroute(dev
);
3289 static int fixup_permanent_addr(struct inet6_dev
*idev
,
3290 struct inet6_ifaddr
*ifp
)
3292 /* !rt6i_node means the host route was removed from the
3293 * FIB, for example, if 'lo' device is taken down. In that
3294 * case regenerate the host route.
3296 if (!ifp
->rt
|| !ifp
->rt
->rt6i_node
) {
3297 struct rt6_info
*rt
, *prev
;
3299 rt
= addrconf_dst_alloc(idev
, &ifp
->addr
, false);
3300 if (unlikely(IS_ERR(rt
)))
3303 /* ifp->rt can be accessed outside of rtnl */
3304 spin_lock(&ifp
->lock
);
3307 spin_unlock(&ifp
->lock
);
3312 if (!(ifp
->flags
& IFA_F_NOPREFIXROUTE
)) {
3313 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
,
3317 if (ifp
->state
== INET6_IFADDR_STATE_PREDAD
)
3318 addrconf_dad_start(ifp
);
3323 static void addrconf_permanent_addr(struct net_device
*dev
)
3325 struct inet6_ifaddr
*ifp
, *tmp
;
3326 struct inet6_dev
*idev
;
3328 idev
= __in6_dev_get(dev
);
3332 write_lock_bh(&idev
->lock
);
3334 list_for_each_entry_safe(ifp
, tmp
, &idev
->addr_list
, if_list
) {
3335 if ((ifp
->flags
& IFA_F_PERMANENT
) &&
3336 fixup_permanent_addr(idev
, ifp
) < 0) {
3337 write_unlock_bh(&idev
->lock
);
3340 write_lock_bh(&idev
->lock
);
3342 net_info_ratelimited("%s: Failed to add prefix route for address %pI6c; dropping\n",
3343 idev
->dev
->name
, &ifp
->addr
);
3347 write_unlock_bh(&idev
->lock
);
3350 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
3353 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
3354 struct netdev_notifier_changeupper_info
*info
;
3355 struct inet6_dev
*idev
= __in6_dev_get(dev
);
3356 struct net
*net
= dev_net(dev
);
3357 int run_pending
= 0;
3361 case NETDEV_REGISTER
:
3362 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
3363 idev
= ipv6_add_dev(dev
);
3365 return notifier_from_errno(PTR_ERR(idev
));
3369 case NETDEV_CHANGEMTU
:
3370 /* if MTU under IPV6_MIN_MTU stop IPv6 on this interface. */
3371 if (dev
->mtu
< IPV6_MIN_MTU
) {
3372 addrconf_ifdown(dev
, dev
!= net
->loopback_dev
);
3377 rt6_mtu_change(dev
, dev
->mtu
);
3378 idev
->cnf
.mtu6
= dev
->mtu
;
3382 /* allocate new idev */
3383 idev
= ipv6_add_dev(dev
);
3387 /* device is still not ready */
3388 if (!(idev
->if_flags
& IF_READY
))
3397 if (dev
->flags
& IFF_SLAVE
)
3400 if (idev
&& idev
->cnf
.disable_ipv6
)
3403 if (event
== NETDEV_UP
) {
3404 /* restore routes for permanent addresses */
3405 addrconf_permanent_addr(dev
);
3407 if (!addrconf_qdisc_ok(dev
)) {
3408 /* device is not ready yet. */
3409 pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n",
3414 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
3415 idev
= ipv6_add_dev(dev
);
3417 if (!IS_ERR_OR_NULL(idev
)) {
3418 idev
->if_flags
|= IF_READY
;
3421 } else if (event
== NETDEV_CHANGE
) {
3422 if (!addrconf_qdisc_ok(dev
)) {
3423 /* device is still not ready. */
3428 if (idev
->if_flags
& IF_READY
) {
3429 /* device is already configured -
3430 * but resend MLD reports, we might
3431 * have roamed and need to update
3432 * multicast snooping switches
3437 idev
->if_flags
|= IF_READY
;
3440 pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n",
3446 switch (dev
->type
) {
3447 #if IS_ENABLED(CONFIG_IPV6_SIT)
3449 addrconf_sit_config(dev
);
3452 #if IS_ENABLED(CONFIG_NET_IPGRE)
3454 addrconf_gre_config(dev
);
3457 case ARPHRD_LOOPBACK
:
3462 addrconf_dev_config(dev
);
3466 if (!IS_ERR_OR_NULL(idev
)) {
3468 addrconf_dad_run(idev
);
3471 * If the MTU changed during the interface down,
3472 * when the interface up, the changed MTU must be
3473 * reflected in the idev as well as routers.
3475 if (idev
->cnf
.mtu6
!= dev
->mtu
&&
3476 dev
->mtu
>= IPV6_MIN_MTU
) {
3477 rt6_mtu_change(dev
, dev
->mtu
);
3478 idev
->cnf
.mtu6
= dev
->mtu
;
3480 idev
->tstamp
= jiffies
;
3481 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
3484 * If the changed mtu during down is lower than
3485 * IPV6_MIN_MTU stop IPv6 on this interface.
3487 if (dev
->mtu
< IPV6_MIN_MTU
)
3488 addrconf_ifdown(dev
, dev
!= net
->loopback_dev
);
3493 case NETDEV_UNREGISTER
:
3495 * Remove all addresses from this interface.
3497 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
3500 case NETDEV_CHANGENAME
:
3502 snmp6_unregister_dev(idev
);
3503 addrconf_sysctl_unregister(idev
);
3504 err
= addrconf_sysctl_register(idev
);
3506 return notifier_from_errno(err
);
3507 err
= snmp6_register_dev(idev
);
3509 addrconf_sysctl_unregister(idev
);
3510 return notifier_from_errno(err
);
3515 case NETDEV_PRE_TYPE_CHANGE
:
3516 case NETDEV_POST_TYPE_CHANGE
:
3518 addrconf_type_change(dev
, event
);
3521 case NETDEV_CHANGEUPPER
:
3524 /* flush all routes if dev is linked to or unlinked from
3525 * an L3 master device (e.g., VRF)
3527 if (info
->upper_dev
&& netif_is_l3_master(info
->upper_dev
))
3528 addrconf_ifdown(dev
, 0);
3535 * addrconf module should be notified of a device going up
3537 static struct notifier_block ipv6_dev_notf
= {
3538 .notifier_call
= addrconf_notify
,
3539 .priority
= ADDRCONF_NOTIFY_PRIORITY
,
3542 static void addrconf_type_change(struct net_device
*dev
, unsigned long event
)
3544 struct inet6_dev
*idev
;
3547 idev
= __in6_dev_get(dev
);
3549 if (event
== NETDEV_POST_TYPE_CHANGE
)
3550 ipv6_mc_remap(idev
);
3551 else if (event
== NETDEV_PRE_TYPE_CHANGE
)
3552 ipv6_mc_unmap(idev
);
3555 static bool addr_is_local(const struct in6_addr
*addr
)
3557 return ipv6_addr_type(addr
) &
3558 (IPV6_ADDR_LINKLOCAL
| IPV6_ADDR_LOOPBACK
);
3561 static int addrconf_ifdown(struct net_device
*dev
, int how
)
3563 struct net
*net
= dev_net(dev
);
3564 struct inet6_dev
*idev
;
3565 struct inet6_ifaddr
*ifa
, *tmp
;
3566 struct list_head del_list
;
3573 rt6_ifdown(net
, dev
);
3574 neigh_ifdown(&nd_tbl
, dev
);
3576 idev
= __in6_dev_get(dev
);
3581 * Step 1: remove reference to ipv6 device from parent device.
3587 /* protected by rtnl_lock */
3588 RCU_INIT_POINTER(dev
->ip6_ptr
, NULL
);
3590 /* Step 1.5: remove snmp6 entry */
3591 snmp6_unregister_dev(idev
);
3595 /* aggregate the system setting and interface setting */
3596 _keep_addr
= net
->ipv6
.devconf_all
->keep_addr_on_down
;
3598 _keep_addr
= idev
->cnf
.keep_addr_on_down
;
3600 /* combine the user config with event to determine if permanent
3601 * addresses are to be removed from address hash table
3603 keep_addr
= !(how
|| _keep_addr
<= 0 || idev
->cnf
.disable_ipv6
);
3605 /* Step 2: clear hash table */
3606 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
3607 struct hlist_head
*h
= &inet6_addr_lst
[i
];
3609 spin_lock_bh(&addrconf_hash_lock
);
3611 hlist_for_each_entry_rcu(ifa
, h
, addr_lst
) {
3612 if (ifa
->idev
== idev
) {
3613 addrconf_del_dad_work(ifa
);
3614 /* combined flag + permanent flag decide if
3615 * address is retained on a down event
3618 !(ifa
->flags
& IFA_F_PERMANENT
) ||
3619 addr_is_local(&ifa
->addr
)) {
3620 hlist_del_init_rcu(&ifa
->addr_lst
);
3625 spin_unlock_bh(&addrconf_hash_lock
);
3628 write_lock_bh(&idev
->lock
);
3630 addrconf_del_rs_timer(idev
);
3632 /* Step 2: clear flags for stateless addrconf */
3634 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
3636 /* Step 3: clear tempaddr list */
3637 while (!list_empty(&idev
->tempaddr_list
)) {
3638 ifa
= list_first_entry(&idev
->tempaddr_list
,
3639 struct inet6_ifaddr
, tmp_list
);
3640 list_del(&ifa
->tmp_list
);
3641 write_unlock_bh(&idev
->lock
);
3642 spin_lock_bh(&ifa
->lock
);
3645 in6_ifa_put(ifa
->ifpub
);
3648 spin_unlock_bh(&ifa
->lock
);
3650 write_lock_bh(&idev
->lock
);
3653 /* re-combine the user config with event to determine if permanent
3654 * addresses are to be removed from the interface list
3656 keep_addr
= (!how
&& _keep_addr
> 0 && !idev
->cnf
.disable_ipv6
);
3658 INIT_LIST_HEAD(&del_list
);
3659 list_for_each_entry_safe(ifa
, tmp
, &idev
->addr_list
, if_list
) {
3660 struct rt6_info
*rt
= NULL
;
3663 addrconf_del_dad_work(ifa
);
3665 keep
= keep_addr
&& (ifa
->flags
& IFA_F_PERMANENT
) &&
3666 !addr_is_local(&ifa
->addr
);
3668 list_move(&ifa
->if_list
, &del_list
);
3670 write_unlock_bh(&idev
->lock
);
3671 spin_lock_bh(&ifa
->lock
);
3674 /* set state to skip the notifier below */
3675 state
= INET6_IFADDR_STATE_DEAD
;
3676 ifa
->state
= INET6_IFADDR_STATE_PREDAD
;
3677 if (!(ifa
->flags
& IFA_F_NODAD
))
3678 ifa
->flags
|= IFA_F_TENTATIVE
;
3684 ifa
->state
= INET6_IFADDR_STATE_DEAD
;
3687 spin_unlock_bh(&ifa
->lock
);
3692 if (state
!= INET6_IFADDR_STATE_DEAD
) {
3693 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
3694 inet6addr_notifier_call_chain(NETDEV_DOWN
, ifa
);
3696 if (idev
->cnf
.forwarding
)
3697 addrconf_leave_anycast(ifa
);
3698 addrconf_leave_solict(ifa
->idev
, &ifa
->addr
);
3701 write_lock_bh(&idev
->lock
);
3704 write_unlock_bh(&idev
->lock
);
3706 /* now clean up addresses to be removed */
3707 while (!list_empty(&del_list
)) {
3708 ifa
= list_first_entry(&del_list
,
3709 struct inet6_ifaddr
, if_list
);
3710 list_del(&ifa
->if_list
);
3715 /* Step 5: Discard anycast and multicast list */
3717 ipv6_ac_destroy_dev(idev
);
3718 ipv6_mc_destroy_dev(idev
);
3723 idev
->tstamp
= jiffies
;
3725 /* Last: Shot the device (if unregistered) */
3727 addrconf_sysctl_unregister(idev
);
3728 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
3729 neigh_ifdown(&nd_tbl
, dev
);
3735 static void addrconf_rs_timer(unsigned long data
)
3737 struct inet6_dev
*idev
= (struct inet6_dev
*)data
;
3738 struct net_device
*dev
= idev
->dev
;
3739 struct in6_addr lladdr
;
3741 write_lock(&idev
->lock
);
3742 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
))
3745 if (!ipv6_accept_ra(idev
))
3748 /* Announcement received after solicitation was sent */
3749 if (idev
->if_flags
& IF_RA_RCVD
)
3752 if (idev
->rs_probes
++ < idev
->cnf
.rtr_solicits
|| idev
->cnf
.rtr_solicits
< 0) {
3753 write_unlock(&idev
->lock
);
3754 if (!ipv6_get_lladdr(dev
, &lladdr
, IFA_F_TENTATIVE
))
3755 ndisc_send_rs(dev
, &lladdr
,
3756 &in6addr_linklocal_allrouters
);
3760 write_lock(&idev
->lock
);
3761 idev
->rs_interval
= rfc3315_s14_backoff_update(
3762 idev
->rs_interval
, idev
->cnf
.rtr_solicit_max_interval
);
3763 /* The wait after the last probe can be shorter */
3764 addrconf_mod_rs_timer(idev
, (idev
->rs_probes
==
3765 idev
->cnf
.rtr_solicits
) ?
3766 idev
->cnf
.rtr_solicit_delay
:
3770 * Note: we do not support deprecated "all on-link"
3771 * assumption any longer.
3773 pr_debug("%s: no IPv6 routers present\n", idev
->dev
->name
);
3777 write_unlock(&idev
->lock
);
3783 * Duplicate Address Detection
3785 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
3787 unsigned long rand_num
;
3788 struct inet6_dev
*idev
= ifp
->idev
;
3791 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
3794 rand_num
= prandom_u32() % (idev
->cnf
.rtr_solicit_delay
? : 1);
3797 if (idev
->cnf
.enhanced_dad
||
3798 dev_net(idev
->dev
)->ipv6
.devconf_all
->enhanced_dad
) {
3800 get_random_bytes(&nonce
, 6);
3803 ifp
->dad_nonce
= nonce
;
3804 ifp
->dad_probes
= idev
->cnf
.dad_transmits
;
3805 addrconf_mod_dad_work(ifp
, rand_num
);
3808 static void addrconf_dad_begin(struct inet6_ifaddr
*ifp
)
3810 struct inet6_dev
*idev
= ifp
->idev
;
3811 struct net_device
*dev
= idev
->dev
;
3812 bool bump_id
, notify
= false;
3814 addrconf_join_solict(dev
, &ifp
->addr
);
3816 prandom_seed((__force u32
) ifp
->addr
.s6_addr32
[3]);
3818 read_lock_bh(&idev
->lock
);
3819 spin_lock(&ifp
->lock
);
3820 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
)
3823 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
3824 (dev_net(dev
)->ipv6
.devconf_all
->accept_dad
< 1 &&
3825 idev
->cnf
.accept_dad
< 1) ||
3826 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
3827 ifp
->flags
& IFA_F_NODAD
) {
3828 bump_id
= ifp
->flags
& IFA_F_TENTATIVE
;
3829 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3830 spin_unlock(&ifp
->lock
);
3831 read_unlock_bh(&idev
->lock
);
3833 addrconf_dad_completed(ifp
, bump_id
);
3837 if (!(idev
->if_flags
& IF_READY
)) {
3838 spin_unlock(&ifp
->lock
);
3839 read_unlock_bh(&idev
->lock
);
3841 * If the device is not ready:
3842 * - keep it tentative if it is a permanent address.
3843 * - otherwise, kill it.
3846 addrconf_dad_stop(ifp
, 0);
3851 * Optimistic nodes can start receiving
3854 if (ifp
->flags
& IFA_F_OPTIMISTIC
) {
3855 ip6_ins_rt(ifp
->rt
);
3856 if (ipv6_use_optimistic_addr(dev_net(dev
), idev
)) {
3857 /* Because optimistic nodes can use this address,
3858 * notify listeners. If DAD fails, RTM_DELADDR is sent.
3864 addrconf_dad_kick(ifp
);
3866 spin_unlock(&ifp
->lock
);
3867 read_unlock_bh(&idev
->lock
);
3869 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
3872 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
)
3874 bool begin_dad
= false;
3876 spin_lock_bh(&ifp
->lock
);
3877 if (ifp
->state
!= INET6_IFADDR_STATE_DEAD
) {
3878 ifp
->state
= INET6_IFADDR_STATE_PREDAD
;
3881 spin_unlock_bh(&ifp
->lock
);
3884 addrconf_mod_dad_work(ifp
, 0);
3887 static void addrconf_dad_work(struct work_struct
*w
)
3889 struct inet6_ifaddr
*ifp
= container_of(to_delayed_work(w
),
3890 struct inet6_ifaddr
,
3892 struct inet6_dev
*idev
= ifp
->idev
;
3893 bool bump_id
, disable_ipv6
= false;
3894 struct in6_addr mcaddr
;
3900 } action
= DAD_PROCESS
;
3904 spin_lock_bh(&ifp
->lock
);
3905 if (ifp
->state
== INET6_IFADDR_STATE_PREDAD
) {
3907 ifp
->state
= INET6_IFADDR_STATE_DAD
;
3908 } else if (ifp
->state
== INET6_IFADDR_STATE_ERRDAD
) {
3910 ifp
->state
= INET6_IFADDR_STATE_POSTDAD
;
3912 if ((dev_net(idev
->dev
)->ipv6
.devconf_all
->accept_dad
> 1 ||
3913 idev
->cnf
.accept_dad
> 1) &&
3914 !idev
->cnf
.disable_ipv6
&&
3915 !(ifp
->flags
& IFA_F_STABLE_PRIVACY
)) {
3916 struct in6_addr addr
;
3918 addr
.s6_addr32
[0] = htonl(0xfe800000);
3919 addr
.s6_addr32
[1] = 0;
3921 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) &&
3922 ipv6_addr_equal(&ifp
->addr
, &addr
)) {
3923 /* DAD failed for link-local based on MAC */
3924 idev
->cnf
.disable_ipv6
= 1;
3926 pr_info("%s: IPv6 being disabled!\n",
3927 ifp
->idev
->dev
->name
);
3928 disable_ipv6
= true;
3932 spin_unlock_bh(&ifp
->lock
);
3934 if (action
== DAD_BEGIN
) {
3935 addrconf_dad_begin(ifp
);
3937 } else if (action
== DAD_ABORT
) {
3939 addrconf_dad_stop(ifp
, 1);
3941 addrconf_ifdown(idev
->dev
, 0);
3945 if (!ifp
->dad_probes
&& addrconf_dad_end(ifp
))
3948 write_lock_bh(&idev
->lock
);
3949 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
)) {
3950 write_unlock_bh(&idev
->lock
);
3954 spin_lock(&ifp
->lock
);
3955 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
) {
3956 spin_unlock(&ifp
->lock
);
3957 write_unlock_bh(&idev
->lock
);
3961 if (ifp
->dad_probes
== 0) {
3963 * DAD was successful
3966 bump_id
= ifp
->flags
& IFA_F_TENTATIVE
;
3967 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3968 spin_unlock(&ifp
->lock
);
3969 write_unlock_bh(&idev
->lock
);
3971 addrconf_dad_completed(ifp
, bump_id
);
3977 addrconf_mod_dad_work(ifp
,
3978 NEIGH_VAR(ifp
->idev
->nd_parms
, RETRANS_TIME
));
3979 spin_unlock(&ifp
->lock
);
3980 write_unlock_bh(&idev
->lock
);
3982 /* send a neighbour solicitation for our addr */
3983 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
3984 ndisc_send_ns(ifp
->idev
->dev
, &ifp
->addr
, &mcaddr
, &in6addr_any
,
3991 /* ifp->idev must be at least read locked */
3992 static bool ipv6_lonely_lladdr(struct inet6_ifaddr
*ifp
)
3994 struct inet6_ifaddr
*ifpiter
;
3995 struct inet6_dev
*idev
= ifp
->idev
;
3997 list_for_each_entry_reverse(ifpiter
, &idev
->addr_list
, if_list
) {
3998 if (ifpiter
->scope
> IFA_LINK
)
4000 if (ifp
!= ifpiter
&& ifpiter
->scope
== IFA_LINK
&&
4001 (ifpiter
->flags
& (IFA_F_PERMANENT
|IFA_F_TENTATIVE
|
4002 IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
)) ==
4009 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
, bool bump_id
)
4011 struct net_device
*dev
= ifp
->idev
->dev
;
4012 struct in6_addr lladdr
;
4013 bool send_rs
, send_mld
;
4015 addrconf_del_dad_work(ifp
);
4018 * Configure the address for reception. Now it is valid.
4021 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
4023 /* If added prefix is link local and we are prepared to process
4024 router advertisements, start sending router solicitations.
4027 read_lock_bh(&ifp
->idev
->lock
);
4028 send_mld
= ifp
->scope
== IFA_LINK
&& ipv6_lonely_lladdr(ifp
);
4029 send_rs
= send_mld
&&
4030 ipv6_accept_ra(ifp
->idev
) &&
4031 ifp
->idev
->cnf
.rtr_solicits
!= 0 &&
4032 (dev
->flags
&IFF_LOOPBACK
) == 0;
4033 read_unlock_bh(&ifp
->idev
->lock
);
4035 /* While dad is in progress mld report's source address is in6_addrany.
4036 * Resend with proper ll now.
4039 ipv6_mc_dad_complete(ifp
->idev
);
4043 * If a host as already performed a random delay
4044 * [...] as part of DAD [...] there is no need
4045 * to delay again before sending the first RS
4047 if (ipv6_get_lladdr(dev
, &lladdr
, IFA_F_TENTATIVE
))
4049 ndisc_send_rs(dev
, &lladdr
, &in6addr_linklocal_allrouters
);
4051 write_lock_bh(&ifp
->idev
->lock
);
4052 spin_lock(&ifp
->lock
);
4053 ifp
->idev
->rs_interval
= rfc3315_s14_backoff_init(
4054 ifp
->idev
->cnf
.rtr_solicit_interval
);
4055 ifp
->idev
->rs_probes
= 1;
4056 ifp
->idev
->if_flags
|= IF_RS_SENT
;
4057 addrconf_mod_rs_timer(ifp
->idev
, ifp
->idev
->rs_interval
);
4058 spin_unlock(&ifp
->lock
);
4059 write_unlock_bh(&ifp
->idev
->lock
);
4063 rt_genid_bump_ipv6(dev_net(dev
));
4065 /* Make sure that a new temporary address will be created
4066 * before this temporary address becomes deprecated.
4068 if (ifp
->flags
& IFA_F_TEMPORARY
)
4069 addrconf_verify_rtnl();
4072 static void addrconf_dad_run(struct inet6_dev
*idev
)
4074 struct inet6_ifaddr
*ifp
;
4076 read_lock_bh(&idev
->lock
);
4077 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
4078 spin_lock(&ifp
->lock
);
4079 if (ifp
->flags
& IFA_F_TENTATIVE
&&
4080 ifp
->state
== INET6_IFADDR_STATE_DAD
)
4081 addrconf_dad_kick(ifp
);
4082 spin_unlock(&ifp
->lock
);
4084 read_unlock_bh(&idev
->lock
);
4087 #ifdef CONFIG_PROC_FS
4088 struct if6_iter_state
{
4089 struct seq_net_private p
;
4094 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
, loff_t pos
)
4096 struct inet6_ifaddr
*ifa
= NULL
;
4097 struct if6_iter_state
*state
= seq
->private;
4098 struct net
*net
= seq_file_net(seq
);
4101 /* initial bucket if pos is 0 */
4107 for (; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
4108 hlist_for_each_entry_rcu_bh(ifa
, &inet6_addr_lst
[state
->bucket
],
4110 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
4112 /* sync with offset */
4113 if (p
< state
->offset
) {
4121 /* prepare for next bucket */
4128 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
,
4129 struct inet6_ifaddr
*ifa
)
4131 struct if6_iter_state
*state
= seq
->private;
4132 struct net
*net
= seq_file_net(seq
);
4134 hlist_for_each_entry_continue_rcu_bh(ifa
, addr_lst
) {
4135 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
4141 while (++state
->bucket
< IN6_ADDR_HSIZE
) {
4143 hlist_for_each_entry_rcu_bh(ifa
,
4144 &inet6_addr_lst
[state
->bucket
], addr_lst
) {
4145 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
4155 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
4159 return if6_get_first(seq
, *pos
);
4162 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
4164 struct inet6_ifaddr
*ifa
;
4166 ifa
= if6_get_next(seq
, v
);
4171 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
4174 rcu_read_unlock_bh();
4177 static int if6_seq_show(struct seq_file
*seq
, void *v
)
4179 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
4180 seq_printf(seq
, "%pi6 %02x %02x %02x %02x %8s\n",
4182 ifp
->idev
->dev
->ifindex
,
4186 ifp
->idev
->dev
->name
);
4190 static const struct seq_operations if6_seq_ops
= {
4191 .start
= if6_seq_start
,
4192 .next
= if6_seq_next
,
4193 .show
= if6_seq_show
,
4194 .stop
= if6_seq_stop
,
4197 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
4199 return seq_open_net(inode
, file
, &if6_seq_ops
,
4200 sizeof(struct if6_iter_state
));
4203 static const struct file_operations if6_fops
= {
4204 .owner
= THIS_MODULE
,
4205 .open
= if6_seq_open
,
4207 .llseek
= seq_lseek
,
4208 .release
= seq_release_net
,
4211 static int __net_init
if6_proc_net_init(struct net
*net
)
4213 if (!proc_create("if_inet6", S_IRUGO
, net
->proc_net
, &if6_fops
))
4218 static void __net_exit
if6_proc_net_exit(struct net
*net
)
4220 remove_proc_entry("if_inet6", net
->proc_net
);
4223 static struct pernet_operations if6_proc_net_ops
= {
4224 .init
= if6_proc_net_init
,
4225 .exit
= if6_proc_net_exit
,
4228 int __init
if6_proc_init(void)
4230 return register_pernet_subsys(&if6_proc_net_ops
);
4233 void if6_proc_exit(void)
4235 unregister_pernet_subsys(&if6_proc_net_ops
);
4237 #endif /* CONFIG_PROC_FS */
4239 #if IS_ENABLED(CONFIG_IPV6_MIP6)
4240 /* Check if address is a home address configured on any interface. */
4241 int ipv6_chk_home_addr(struct net
*net
, const struct in6_addr
*addr
)
4244 struct inet6_ifaddr
*ifp
= NULL
;
4245 unsigned int hash
= inet6_addr_hash(addr
);
4248 hlist_for_each_entry_rcu_bh(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
4249 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
4251 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
4252 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
4257 rcu_read_unlock_bh();
4263 * Periodic address status verification
4266 static void addrconf_verify_rtnl(void)
4268 unsigned long now
, next
, next_sec
, next_sched
;
4269 struct inet6_ifaddr
*ifp
;
4276 next
= round_jiffies_up(now
+ ADDR_CHECK_FREQUENCY
);
4278 cancel_delayed_work(&addr_chk_work
);
4280 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
4282 hlist_for_each_entry_rcu_bh(ifp
, &inet6_addr_lst
[i
], addr_lst
) {
4285 /* When setting preferred_lft to a value not zero or
4286 * infinity, while valid_lft is infinity
4287 * IFA_F_PERMANENT has a non-infinity life time.
4289 if ((ifp
->flags
& IFA_F_PERMANENT
) &&
4290 (ifp
->prefered_lft
== INFINITY_LIFE_TIME
))
4293 spin_lock(&ifp
->lock
);
4294 /* We try to batch several events at once. */
4295 age
= (now
- ifp
->tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
4297 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
4298 age
>= ifp
->valid_lft
) {
4299 spin_unlock(&ifp
->lock
);
4303 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
4304 spin_unlock(&ifp
->lock
);
4306 } else if (age
>= ifp
->prefered_lft
) {
4307 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
4310 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
4312 ifp
->flags
|= IFA_F_DEPRECATED
;
4315 if ((ifp
->valid_lft
!= INFINITY_LIFE_TIME
) &&
4316 (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
)))
4317 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
4319 spin_unlock(&ifp
->lock
);
4324 ipv6_ifa_notify(0, ifp
);
4328 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
4329 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
4330 unsigned long regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
4331 ifp
->idev
->cnf
.dad_transmits
*
4332 NEIGH_VAR(ifp
->idev
->nd_parms
, RETRANS_TIME
) / HZ
;
4334 if (age
>= ifp
->prefered_lft
- regen_advance
) {
4335 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
4336 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
4337 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
4338 if (!ifp
->regen_count
&& ifpub
) {
4341 in6_ifa_hold(ifpub
);
4342 spin_unlock(&ifp
->lock
);
4344 spin_lock(&ifpub
->lock
);
4345 ifpub
->regen_count
= 0;
4346 spin_unlock(&ifpub
->lock
);
4347 ipv6_create_tempaddr(ifpub
, ifp
);
4352 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
4353 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
4354 spin_unlock(&ifp
->lock
);
4356 /* ifp->prefered_lft <= ifp->valid_lft */
4357 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
4358 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
4359 spin_unlock(&ifp
->lock
);
4364 next_sec
= round_jiffies_up(next
);
4367 /* If rounded timeout is accurate enough, accept it. */
4368 if (time_before(next_sec
, next
+ ADDRCONF_TIMER_FUZZ
))
4369 next_sched
= next_sec
;
4371 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
4372 if (time_before(next_sched
, jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
))
4373 next_sched
= jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
;
4375 ADBG(KERN_DEBUG
"now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
4376 now
, next
, next_sec
, next_sched
);
4377 mod_delayed_work(addrconf_wq
, &addr_chk_work
, next_sched
- now
);
4378 rcu_read_unlock_bh();
4381 static void addrconf_verify_work(struct work_struct
*w
)
4384 addrconf_verify_rtnl();
4388 static void addrconf_verify(void)
4390 mod_delayed_work(addrconf_wq
, &addr_chk_work
, 0);
4393 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
,
4394 struct in6_addr
**peer_pfx
)
4396 struct in6_addr
*pfx
= NULL
;
4401 pfx
= nla_data(addr
);
4404 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
4406 pfx
= nla_data(local
);
4412 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
4413 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
4414 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
4415 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
4416 [IFA_FLAGS
] = { .len
= sizeof(u32
) },
4420 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
4421 struct netlink_ext_ack
*extack
)
4423 struct net
*net
= sock_net(skb
->sk
);
4424 struct ifaddrmsg
*ifm
;
4425 struct nlattr
*tb
[IFA_MAX
+1];
4426 struct in6_addr
*pfx
, *peer_pfx
;
4430 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
,
4435 ifm
= nlmsg_data(nlh
);
4436 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer_pfx
);
4440 ifa_flags
= tb
[IFA_FLAGS
] ? nla_get_u32(tb
[IFA_FLAGS
]) : ifm
->ifa_flags
;
4442 /* We ignore other flags so far. */
4443 ifa_flags
&= IFA_F_MANAGETEMPADDR
;
4445 return inet6_addr_del(net
, ifm
->ifa_index
, ifa_flags
, pfx
,
4446 ifm
->ifa_prefixlen
);
4449 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u32 ifa_flags
,
4450 u32 prefered_lft
, u32 valid_lft
)
4454 unsigned long timeout
;
4455 bool was_managetempaddr
;
4456 bool had_prefixroute
;
4460 if (!valid_lft
|| (prefered_lft
> valid_lft
))
4463 if (ifa_flags
& IFA_F_MANAGETEMPADDR
&&
4464 (ifp
->flags
& IFA_F_TEMPORARY
|| ifp
->prefix_len
!= 64))
4467 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
4468 if (addrconf_finite_timeout(timeout
)) {
4469 expires
= jiffies_to_clock_t(timeout
* HZ
);
4470 valid_lft
= timeout
;
4471 flags
= RTF_EXPIRES
;
4475 ifa_flags
|= IFA_F_PERMANENT
;
4478 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
4479 if (addrconf_finite_timeout(timeout
)) {
4481 ifa_flags
|= IFA_F_DEPRECATED
;
4482 prefered_lft
= timeout
;
4485 spin_lock_bh(&ifp
->lock
);
4486 was_managetempaddr
= ifp
->flags
& IFA_F_MANAGETEMPADDR
;
4487 had_prefixroute
= ifp
->flags
& IFA_F_PERMANENT
&&
4488 !(ifp
->flags
& IFA_F_NOPREFIXROUTE
);
4489 ifp
->flags
&= ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
|
4490 IFA_F_HOMEADDRESS
| IFA_F_MANAGETEMPADDR
|
4491 IFA_F_NOPREFIXROUTE
);
4492 ifp
->flags
|= ifa_flags
;
4493 ifp
->tstamp
= jiffies
;
4494 ifp
->valid_lft
= valid_lft
;
4495 ifp
->prefered_lft
= prefered_lft
;
4497 spin_unlock_bh(&ifp
->lock
);
4498 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
4499 ipv6_ifa_notify(0, ifp
);
4501 if (!(ifa_flags
& IFA_F_NOPREFIXROUTE
)) {
4502 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
4504 } else if (had_prefixroute
) {
4505 enum cleanup_prefix_rt_t action
;
4506 unsigned long rt_expires
;
4508 write_lock_bh(&ifp
->idev
->lock
);
4509 action
= check_cleanup_prefix_route(ifp
, &rt_expires
);
4510 write_unlock_bh(&ifp
->idev
->lock
);
4512 if (action
!= CLEANUP_PREFIX_RT_NOP
) {
4513 cleanup_prefix_route(ifp
, rt_expires
,
4514 action
== CLEANUP_PREFIX_RT_DEL
);
4518 if (was_managetempaddr
|| ifp
->flags
& IFA_F_MANAGETEMPADDR
) {
4519 if (was_managetempaddr
&& !(ifp
->flags
& IFA_F_MANAGETEMPADDR
))
4520 valid_lft
= prefered_lft
= 0;
4521 manage_tempaddrs(ifp
->idev
, ifp
, valid_lft
, prefered_lft
,
4522 !was_managetempaddr
, jiffies
);
4525 addrconf_verify_rtnl();
4531 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
4532 struct netlink_ext_ack
*extack
)
4534 struct net
*net
= sock_net(skb
->sk
);
4535 struct ifaddrmsg
*ifm
;
4536 struct nlattr
*tb
[IFA_MAX
+1];
4537 struct in6_addr
*pfx
, *peer_pfx
;
4538 struct inet6_ifaddr
*ifa
;
4539 struct net_device
*dev
;
4540 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
4544 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
,
4549 ifm
= nlmsg_data(nlh
);
4550 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer_pfx
);
4554 if (tb
[IFA_CACHEINFO
]) {
4555 struct ifa_cacheinfo
*ci
;
4557 ci
= nla_data(tb
[IFA_CACHEINFO
]);
4558 valid_lft
= ci
->ifa_valid
;
4559 preferred_lft
= ci
->ifa_prefered
;
4561 preferred_lft
= INFINITY_LIFE_TIME
;
4562 valid_lft
= INFINITY_LIFE_TIME
;
4565 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
4569 ifa_flags
= tb
[IFA_FLAGS
] ? nla_get_u32(tb
[IFA_FLAGS
]) : ifm
->ifa_flags
;
4571 /* We ignore other flags so far. */
4572 ifa_flags
&= IFA_F_NODAD
| IFA_F_HOMEADDRESS
| IFA_F_MANAGETEMPADDR
|
4573 IFA_F_NOPREFIXROUTE
| IFA_F_MCAUTOJOIN
;
4575 ifa
= ipv6_get_ifaddr(net
, pfx
, dev
, 1);
4578 * It would be best to check for !NLM_F_CREATE here but
4579 * userspace already relies on not having to provide this.
4581 return inet6_addr_add(net
, ifm
->ifa_index
, pfx
, peer_pfx
,
4582 ifm
->ifa_prefixlen
, ifa_flags
,
4583 preferred_lft
, valid_lft
);
4586 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
4587 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
4590 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
4597 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u32 flags
,
4598 u8 scope
, int ifindex
)
4600 struct ifaddrmsg
*ifm
;
4602 ifm
= nlmsg_data(nlh
);
4603 ifm
->ifa_family
= AF_INET6
;
4604 ifm
->ifa_prefixlen
= prefixlen
;
4605 ifm
->ifa_flags
= flags
;
4606 ifm
->ifa_scope
= scope
;
4607 ifm
->ifa_index
= ifindex
;
4610 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
4611 unsigned long tstamp
, u32 preferred
, u32 valid
)
4613 struct ifa_cacheinfo ci
;
4615 ci
.cstamp
= cstamp_delta(cstamp
);
4616 ci
.tstamp
= cstamp_delta(tstamp
);
4617 ci
.ifa_prefered
= preferred
;
4618 ci
.ifa_valid
= valid
;
4620 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
4623 static inline int rt_scope(int ifa_scope
)
4625 if (ifa_scope
& IFA_HOST
)
4626 return RT_SCOPE_HOST
;
4627 else if (ifa_scope
& IFA_LINK
)
4628 return RT_SCOPE_LINK
;
4629 else if (ifa_scope
& IFA_SITE
)
4630 return RT_SCOPE_SITE
;
4632 return RT_SCOPE_UNIVERSE
;
4635 static inline int inet6_ifaddr_msgsize(void)
4637 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
4638 + nla_total_size(16) /* IFA_LOCAL */
4639 + nla_total_size(16) /* IFA_ADDRESS */
4640 + nla_total_size(sizeof(struct ifa_cacheinfo
))
4641 + nla_total_size(4) /* IFA_FLAGS */;
4644 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
4645 u32 portid
, u32 seq
, int event
, unsigned int flags
)
4647 struct nlmsghdr
*nlh
;
4648 u32 preferred
, valid
;
4650 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
4654 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
4655 ifa
->idev
->dev
->ifindex
);
4657 if (!((ifa
->flags
&IFA_F_PERMANENT
) &&
4658 (ifa
->prefered_lft
== INFINITY_LIFE_TIME
))) {
4659 preferred
= ifa
->prefered_lft
;
4660 valid
= ifa
->valid_lft
;
4661 if (preferred
!= INFINITY_LIFE_TIME
) {
4662 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
4663 if (preferred
> tval
)
4667 if (valid
!= INFINITY_LIFE_TIME
) {
4675 preferred
= INFINITY_LIFE_TIME
;
4676 valid
= INFINITY_LIFE_TIME
;
4679 if (!ipv6_addr_any(&ifa
->peer_addr
)) {
4680 if (nla_put_in6_addr(skb
, IFA_LOCAL
, &ifa
->addr
) < 0 ||
4681 nla_put_in6_addr(skb
, IFA_ADDRESS
, &ifa
->peer_addr
) < 0)
4684 if (nla_put_in6_addr(skb
, IFA_ADDRESS
, &ifa
->addr
) < 0)
4687 if (put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0)
4690 if (nla_put_u32(skb
, IFA_FLAGS
, ifa
->flags
) < 0)
4693 nlmsg_end(skb
, nlh
);
4697 nlmsg_cancel(skb
, nlh
);
4701 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
4702 u32 portid
, u32 seq
, int event
, u16 flags
)
4704 struct nlmsghdr
*nlh
;
4705 u8 scope
= RT_SCOPE_UNIVERSE
;
4706 int ifindex
= ifmca
->idev
->dev
->ifindex
;
4708 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
4709 scope
= RT_SCOPE_SITE
;
4711 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
4715 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
4716 if (nla_put_in6_addr(skb
, IFA_MULTICAST
, &ifmca
->mca_addr
) < 0 ||
4717 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
4718 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
4719 nlmsg_cancel(skb
, nlh
);
4723 nlmsg_end(skb
, nlh
);
4727 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
4728 u32 portid
, u32 seq
, int event
, unsigned int flags
)
4730 struct nlmsghdr
*nlh
;
4731 u8 scope
= RT_SCOPE_UNIVERSE
;
4732 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
4734 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
4735 scope
= RT_SCOPE_SITE
;
4737 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
4741 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
4742 if (nla_put_in6_addr(skb
, IFA_ANYCAST
, &ifaca
->aca_addr
) < 0 ||
4743 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
4744 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
4745 nlmsg_cancel(skb
, nlh
);
4749 nlmsg_end(skb
, nlh
);
4759 /* called with rcu_read_lock() */
4760 static int in6_dump_addrs(struct inet6_dev
*idev
, struct sk_buff
*skb
,
4761 struct netlink_callback
*cb
, enum addr_type_t type
,
4762 int s_ip_idx
, int *p_ip_idx
)
4764 struct ifmcaddr6
*ifmca
;
4765 struct ifacaddr6
*ifaca
;
4767 int ip_idx
= *p_ip_idx
;
4769 read_lock_bh(&idev
->lock
);
4771 case UNICAST_ADDR
: {
4772 struct inet6_ifaddr
*ifa
;
4774 /* unicast address incl. temp addr */
4775 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
4776 if (++ip_idx
< s_ip_idx
)
4778 err
= inet6_fill_ifaddr(skb
, ifa
,
4779 NETLINK_CB(cb
->skb
).portid
,
4785 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
4789 case MULTICAST_ADDR
:
4790 /* multicast address */
4791 for (ifmca
= idev
->mc_list
; ifmca
;
4792 ifmca
= ifmca
->next
, ip_idx
++) {
4793 if (ip_idx
< s_ip_idx
)
4795 err
= inet6_fill_ifmcaddr(skb
, ifmca
,
4796 NETLINK_CB(cb
->skb
).portid
,
4805 /* anycast address */
4806 for (ifaca
= idev
->ac_list
; ifaca
;
4807 ifaca
= ifaca
->aca_next
, ip_idx
++) {
4808 if (ip_idx
< s_ip_idx
)
4810 err
= inet6_fill_ifacaddr(skb
, ifaca
,
4811 NETLINK_CB(cb
->skb
).portid
,
4822 read_unlock_bh(&idev
->lock
);
4827 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
4828 enum addr_type_t type
)
4830 struct net
*net
= sock_net(skb
->sk
);
4833 int s_idx
, s_ip_idx
;
4834 struct net_device
*dev
;
4835 struct inet6_dev
*idev
;
4836 struct hlist_head
*head
;
4839 s_idx
= idx
= cb
->args
[1];
4840 s_ip_idx
= ip_idx
= cb
->args
[2];
4843 cb
->seq
= atomic_read(&net
->ipv6
.dev_addr_genid
) ^ net
->dev_base_seq
;
4844 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
4846 head
= &net
->dev_index_head
[h
];
4847 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
4850 if (h
> s_h
|| idx
> s_idx
)
4853 idev
= __in6_dev_get(dev
);
4857 if (in6_dump_addrs(idev
, skb
, cb
, type
,
4858 s_ip_idx
, &ip_idx
) < 0)
4868 cb
->args
[2] = ip_idx
;
4873 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4875 enum addr_type_t type
= UNICAST_ADDR
;
4877 return inet6_dump_addr(skb
, cb
, type
);
4880 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4882 enum addr_type_t type
= MULTICAST_ADDR
;
4884 return inet6_dump_addr(skb
, cb
, type
);
4888 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4890 enum addr_type_t type
= ANYCAST_ADDR
;
4892 return inet6_dump_addr(skb
, cb
, type
);
4895 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
*nlh
,
4896 struct netlink_ext_ack
*extack
)
4898 struct net
*net
= sock_net(in_skb
->sk
);
4899 struct ifaddrmsg
*ifm
;
4900 struct nlattr
*tb
[IFA_MAX
+1];
4901 struct in6_addr
*addr
= NULL
, *peer
;
4902 struct net_device
*dev
= NULL
;
4903 struct inet6_ifaddr
*ifa
;
4904 struct sk_buff
*skb
;
4907 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
,
4912 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer
);
4918 ifm
= nlmsg_data(nlh
);
4920 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
4922 ifa
= ipv6_get_ifaddr(net
, addr
, dev
, 1);
4924 err
= -EADDRNOTAVAIL
;
4928 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
);
4934 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).portid
,
4935 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
4937 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4938 WARN_ON(err
== -EMSGSIZE
);
4942 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).portid
);
4949 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
4951 struct sk_buff
*skb
;
4952 struct net
*net
= dev_net(ifa
->idev
->dev
);
4955 /* Don't send DELADDR notification for TENTATIVE address,
4956 * since NEWADDR notification is sent only after removing
4957 * TENTATIVE flag, if DAD has not failed.
4959 if (ifa
->flags
& IFA_F_TENTATIVE
&& !(ifa
->flags
& IFA_F_DADFAILED
) &&
4960 event
== RTM_DELADDR
)
4963 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
4967 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
4969 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4970 WARN_ON(err
== -EMSGSIZE
);
4974 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
4978 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
4981 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
4982 __s32
*array
, int bytes
)
4984 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
4986 memset(array
, 0, bytes
);
4987 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
4988 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
4989 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
4990 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
4991 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
4992 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
4993 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
4994 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
4995 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] =
4996 jiffies_to_msecs(cnf
->rtr_solicit_interval
);
4997 array
[DEVCONF_RTR_SOLICIT_MAX_INTERVAL
] =
4998 jiffies_to_msecs(cnf
->rtr_solicit_max_interval
);
4999 array
[DEVCONF_RTR_SOLICIT_DELAY
] =
5000 jiffies_to_msecs(cnf
->rtr_solicit_delay
);
5001 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
5002 array
[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL
] =
5003 jiffies_to_msecs(cnf
->mldv1_unsolicited_report_interval
);
5004 array
[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL
] =
5005 jiffies_to_msecs(cnf
->mldv2_unsolicited_report_interval
);
5006 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
5007 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
5008 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
5009 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
5010 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
5011 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
5012 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
5013 array
[DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT
] = cnf
->accept_ra_min_hop_limit
;
5014 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
5015 #ifdef CONFIG_IPV6_ROUTER_PREF
5016 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
5017 array
[DEVCONF_RTR_PROBE_INTERVAL
] =
5018 jiffies_to_msecs(cnf
->rtr_probe_interval
);
5019 #ifdef CONFIG_IPV6_ROUTE_INFO
5020 array
[DEVCONF_ACCEPT_RA_RT_INFO_MIN_PLEN
] = cnf
->accept_ra_rt_info_min_plen
;
5021 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
5024 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
5025 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
5026 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
5027 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
5028 array
[DEVCONF_USE_OPTIMISTIC
] = cnf
->use_optimistic
;
5030 #ifdef CONFIG_IPV6_MROUTE
5031 array
[DEVCONF_MC_FORWARDING
] = cnf
->mc_forwarding
;
5033 array
[DEVCONF_DISABLE_IPV6
] = cnf
->disable_ipv6
;
5034 array
[DEVCONF_ACCEPT_DAD
] = cnf
->accept_dad
;
5035 array
[DEVCONF_FORCE_TLLAO
] = cnf
->force_tllao
;
5036 array
[DEVCONF_NDISC_NOTIFY
] = cnf
->ndisc_notify
;
5037 array
[DEVCONF_SUPPRESS_FRAG_NDISC
] = cnf
->suppress_frag_ndisc
;
5038 array
[DEVCONF_ACCEPT_RA_FROM_LOCAL
] = cnf
->accept_ra_from_local
;
5039 array
[DEVCONF_ACCEPT_RA_MTU
] = cnf
->accept_ra_mtu
;
5040 array
[DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN
] = cnf
->ignore_routes_with_linkdown
;
5041 /* we omit DEVCONF_STABLE_SECRET for now */
5042 array
[DEVCONF_USE_OIF_ADDRS_ONLY
] = cnf
->use_oif_addrs_only
;
5043 array
[DEVCONF_DROP_UNICAST_IN_L2_MULTICAST
] = cnf
->drop_unicast_in_l2_multicast
;
5044 array
[DEVCONF_DROP_UNSOLICITED_NA
] = cnf
->drop_unsolicited_na
;
5045 array
[DEVCONF_KEEP_ADDR_ON_DOWN
] = cnf
->keep_addr_on_down
;
5046 array
[DEVCONF_SEG6_ENABLED
] = cnf
->seg6_enabled
;
5047 #ifdef CONFIG_IPV6_SEG6_HMAC
5048 array
[DEVCONF_SEG6_REQUIRE_HMAC
] = cnf
->seg6_require_hmac
;
5050 array
[DEVCONF_ENHANCED_DAD
] = cnf
->enhanced_dad
;
5051 array
[DEVCONF_ADDR_GEN_MODE
] = cnf
->addr_gen_mode
;
5052 array
[DEVCONF_DISABLE_POLICY
] = cnf
->disable_policy
;
5055 static inline size_t inet6_ifla6_size(void)
5057 return nla_total_size(4) /* IFLA_INET6_FLAGS */
5058 + nla_total_size(sizeof(struct ifla_cacheinfo
))
5059 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
5060 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
5061 + nla_total_size(ICMP6_MIB_MAX
* 8) /* IFLA_INET6_ICMP6STATS */
5062 + nla_total_size(sizeof(struct in6_addr
)); /* IFLA_INET6_TOKEN */
5065 static inline size_t inet6_if_nlmsg_size(void)
5067 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
5068 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
5069 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
5070 + nla_total_size(4) /* IFLA_MTU */
5071 + nla_total_size(4) /* IFLA_LINK */
5072 + nla_total_size(1) /* IFLA_OPERSTATE */
5073 + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
5076 static inline void __snmp6_fill_statsdev(u64
*stats
, atomic_long_t
*mib
,
5080 int pad
= bytes
- sizeof(u64
) * ICMP6_MIB_MAX
;
5083 /* Use put_unaligned() because stats may not be aligned for u64. */
5084 put_unaligned(ICMP6_MIB_MAX
, &stats
[0]);
5085 for (i
= 1; i
< ICMP6_MIB_MAX
; i
++)
5086 put_unaligned(atomic_long_read(&mib
[i
]), &stats
[i
]);
5088 memset(&stats
[ICMP6_MIB_MAX
], 0, pad
);
5091 static inline void __snmp6_fill_stats64(u64
*stats
, void __percpu
*mib
,
5092 int bytes
, size_t syncpoff
)
5095 u64 buff
[IPSTATS_MIB_MAX
];
5096 int pad
= bytes
- sizeof(u64
) * IPSTATS_MIB_MAX
;
5100 memset(buff
, 0, sizeof(buff
));
5101 buff
[0] = IPSTATS_MIB_MAX
;
5103 for_each_possible_cpu(c
) {
5104 for (i
= 1; i
< IPSTATS_MIB_MAX
; i
++)
5105 buff
[i
] += snmp_get_cpu_field64(mib
, c
, i
, syncpoff
);
5108 memcpy(stats
, buff
, IPSTATS_MIB_MAX
* sizeof(u64
));
5109 memset(&stats
[IPSTATS_MIB_MAX
], 0, pad
);
5112 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
5116 case IFLA_INET6_STATS
:
5117 __snmp6_fill_stats64(stats
, idev
->stats
.ipv6
, bytes
,
5118 offsetof(struct ipstats_mib
, syncp
));
5120 case IFLA_INET6_ICMP6STATS
:
5121 __snmp6_fill_statsdev(stats
, idev
->stats
.icmpv6dev
->mibs
, bytes
);
5126 static int inet6_fill_ifla6_attrs(struct sk_buff
*skb
, struct inet6_dev
*idev
,
5127 u32 ext_filter_mask
)
5130 struct ifla_cacheinfo ci
;
5132 if (nla_put_u32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
))
5133 goto nla_put_failure
;
5134 ci
.max_reasm_len
= IPV6_MAXPLEN
;
5135 ci
.tstamp
= cstamp_delta(idev
->tstamp
);
5136 ci
.reachable_time
= jiffies_to_msecs(idev
->nd_parms
->reachable_time
);
5137 ci
.retrans_time
= jiffies_to_msecs(NEIGH_VAR(idev
->nd_parms
, RETRANS_TIME
));
5138 if (nla_put(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
))
5139 goto nla_put_failure
;
5140 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
5142 goto nla_put_failure
;
5143 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
5145 /* XXX - MC not implemented */
5147 if (ext_filter_mask
& RTEXT_FILTER_SKIP_STATS
)
5150 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
5152 goto nla_put_failure
;
5153 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
5155 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
5157 goto nla_put_failure
;
5158 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
5160 nla
= nla_reserve(skb
, IFLA_INET6_TOKEN
, sizeof(struct in6_addr
));
5162 goto nla_put_failure
;
5164 if (nla_put_u8(skb
, IFLA_INET6_ADDR_GEN_MODE
, idev
->cnf
.addr_gen_mode
))
5165 goto nla_put_failure
;
5167 read_lock_bh(&idev
->lock
);
5168 memcpy(nla_data(nla
), idev
->token
.s6_addr
, nla_len(nla
));
5169 read_unlock_bh(&idev
->lock
);
5177 static size_t inet6_get_link_af_size(const struct net_device
*dev
,
5178 u32 ext_filter_mask
)
5180 if (!__in6_dev_get(dev
))
5183 return inet6_ifla6_size();
5186 static int inet6_fill_link_af(struct sk_buff
*skb
, const struct net_device
*dev
,
5187 u32 ext_filter_mask
)
5189 struct inet6_dev
*idev
= __in6_dev_get(dev
);
5194 if (inet6_fill_ifla6_attrs(skb
, idev
, ext_filter_mask
) < 0)
5200 static int inet6_set_iftoken(struct inet6_dev
*idev
, struct in6_addr
*token
)
5202 struct inet6_ifaddr
*ifp
;
5203 struct net_device
*dev
= idev
->dev
;
5204 bool clear_token
, update_rs
= false;
5205 struct in6_addr ll_addr
;
5211 if (dev
->flags
& (IFF_LOOPBACK
| IFF_NOARP
))
5213 if (!ipv6_accept_ra(idev
))
5215 if (idev
->cnf
.rtr_solicits
== 0)
5218 write_lock_bh(&idev
->lock
);
5220 BUILD_BUG_ON(sizeof(token
->s6_addr
) != 16);
5221 memcpy(idev
->token
.s6_addr
+ 8, token
->s6_addr
+ 8, 8);
5223 write_unlock_bh(&idev
->lock
);
5225 clear_token
= ipv6_addr_any(token
);
5229 if (!idev
->dead
&& (idev
->if_flags
& IF_READY
) &&
5230 !ipv6_get_lladdr(dev
, &ll_addr
, IFA_F_TENTATIVE
|
5231 IFA_F_OPTIMISTIC
)) {
5232 /* If we're not ready, then normal ifup will take care
5233 * of this. Otherwise, we need to request our rs here.
5235 ndisc_send_rs(dev
, &ll_addr
, &in6addr_linklocal_allrouters
);
5240 write_lock_bh(&idev
->lock
);
5243 idev
->if_flags
|= IF_RS_SENT
;
5244 idev
->rs_interval
= rfc3315_s14_backoff_init(
5245 idev
->cnf
.rtr_solicit_interval
);
5246 idev
->rs_probes
= 1;
5247 addrconf_mod_rs_timer(idev
, idev
->rs_interval
);
5250 /* Well, that's kinda nasty ... */
5251 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
5252 spin_lock(&ifp
->lock
);
5253 if (ifp
->tokenized
) {
5255 ifp
->prefered_lft
= 0;
5257 spin_unlock(&ifp
->lock
);
5260 write_unlock_bh(&idev
->lock
);
5261 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
5262 addrconf_verify_rtnl();
5266 static const struct nla_policy inet6_af_policy
[IFLA_INET6_MAX
+ 1] = {
5267 [IFLA_INET6_ADDR_GEN_MODE
] = { .type
= NLA_U8
},
5268 [IFLA_INET6_TOKEN
] = { .len
= sizeof(struct in6_addr
) },
5271 static int inet6_validate_link_af(const struct net_device
*dev
,
5272 const struct nlattr
*nla
)
5274 struct nlattr
*tb
[IFLA_INET6_MAX
+ 1];
5276 if (dev
&& !__in6_dev_get(dev
))
5277 return -EAFNOSUPPORT
;
5279 return nla_parse_nested(tb
, IFLA_INET6_MAX
, nla
, inet6_af_policy
,
5283 static int check_addr_gen_mode(int mode
)
5285 if (mode
!= IN6_ADDR_GEN_MODE_EUI64
&&
5286 mode
!= IN6_ADDR_GEN_MODE_NONE
&&
5287 mode
!= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
&&
5288 mode
!= IN6_ADDR_GEN_MODE_RANDOM
)
5293 static int check_stable_privacy(struct inet6_dev
*idev
, struct net
*net
,
5296 if (mode
== IN6_ADDR_GEN_MODE_STABLE_PRIVACY
&&
5297 !idev
->cnf
.stable_secret
.initialized
&&
5298 !net
->ipv6
.devconf_dflt
->stable_secret
.initialized
)
5303 static int inet6_set_link_af(struct net_device
*dev
, const struct nlattr
*nla
)
5306 struct inet6_dev
*idev
= __in6_dev_get(dev
);
5307 struct nlattr
*tb
[IFLA_INET6_MAX
+ 1];
5310 return -EAFNOSUPPORT
;
5312 if (nla_parse_nested(tb
, IFLA_INET6_MAX
, nla
, NULL
, NULL
) < 0)
5315 if (tb
[IFLA_INET6_TOKEN
]) {
5316 err
= inet6_set_iftoken(idev
, nla_data(tb
[IFLA_INET6_TOKEN
]));
5321 if (tb
[IFLA_INET6_ADDR_GEN_MODE
]) {
5322 u8 mode
= nla_get_u8(tb
[IFLA_INET6_ADDR_GEN_MODE
]);
5324 if (check_addr_gen_mode(mode
) < 0 ||
5325 check_stable_privacy(idev
, dev_net(dev
), mode
) < 0)
5328 idev
->cnf
.addr_gen_mode
= mode
;
5335 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
5336 u32 portid
, u32 seq
, int event
, unsigned int flags
)
5338 struct net_device
*dev
= idev
->dev
;
5339 struct ifinfomsg
*hdr
;
5340 struct nlmsghdr
*nlh
;
5343 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*hdr
), flags
);
5347 hdr
= nlmsg_data(nlh
);
5348 hdr
->ifi_family
= AF_INET6
;
5350 hdr
->ifi_type
= dev
->type
;
5351 hdr
->ifi_index
= dev
->ifindex
;
5352 hdr
->ifi_flags
= dev_get_flags(dev
);
5353 hdr
->ifi_change
= 0;
5355 if (nla_put_string(skb
, IFLA_IFNAME
, dev
->name
) ||
5357 nla_put(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
)) ||
5358 nla_put_u32(skb
, IFLA_MTU
, dev
->mtu
) ||
5359 (dev
->ifindex
!= dev_get_iflink(dev
) &&
5360 nla_put_u32(skb
, IFLA_LINK
, dev_get_iflink(dev
))) ||
5361 nla_put_u8(skb
, IFLA_OPERSTATE
,
5362 netif_running(dev
) ? dev
->operstate
: IF_OPER_DOWN
))
5363 goto nla_put_failure
;
5364 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
5366 goto nla_put_failure
;
5368 if (inet6_fill_ifla6_attrs(skb
, idev
, 0) < 0)
5369 goto nla_put_failure
;
5371 nla_nest_end(skb
, protoinfo
);
5372 nlmsg_end(skb
, nlh
);
5376 nlmsg_cancel(skb
, nlh
);
5380 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
5382 struct net
*net
= sock_net(skb
->sk
);
5385 struct net_device
*dev
;
5386 struct inet6_dev
*idev
;
5387 struct hlist_head
*head
;
5390 s_idx
= cb
->args
[1];
5393 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
5395 head
= &net
->dev_index_head
[h
];
5396 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
5399 idev
= __in6_dev_get(dev
);
5402 if (inet6_fill_ifinfo(skb
, idev
,
5403 NETLINK_CB(cb
->skb
).portid
,
5405 RTM_NEWLINK
, NLM_F_MULTI
) < 0)
5419 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
5421 struct sk_buff
*skb
;
5422 struct net
*net
= dev_net(idev
->dev
);
5425 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
5429 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
5431 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
5432 WARN_ON(err
== -EMSGSIZE
);
5436 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFINFO
, NULL
, GFP_ATOMIC
);
5440 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFINFO
, err
);
5443 static inline size_t inet6_prefix_nlmsg_size(void)
5445 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
5446 + nla_total_size(sizeof(struct in6_addr
))
5447 + nla_total_size(sizeof(struct prefix_cacheinfo
));
5450 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
5451 struct prefix_info
*pinfo
, u32 portid
, u32 seq
,
5452 int event
, unsigned int flags
)
5454 struct prefixmsg
*pmsg
;
5455 struct nlmsghdr
*nlh
;
5456 struct prefix_cacheinfo ci
;
5458 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*pmsg
), flags
);
5462 pmsg
= nlmsg_data(nlh
);
5463 pmsg
->prefix_family
= AF_INET6
;
5464 pmsg
->prefix_pad1
= 0;
5465 pmsg
->prefix_pad2
= 0;
5466 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
5467 pmsg
->prefix_len
= pinfo
->prefix_len
;
5468 pmsg
->prefix_type
= pinfo
->type
;
5469 pmsg
->prefix_pad3
= 0;
5470 pmsg
->prefix_flags
= 0;
5472 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
5473 if (pinfo
->autoconf
)
5474 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
5476 if (nla_put(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
))
5477 goto nla_put_failure
;
5478 ci
.preferred_time
= ntohl(pinfo
->prefered
);
5479 ci
.valid_time
= ntohl(pinfo
->valid
);
5480 if (nla_put(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
))
5481 goto nla_put_failure
;
5482 nlmsg_end(skb
, nlh
);
5486 nlmsg_cancel(skb
, nlh
);
5490 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
5491 struct prefix_info
*pinfo
)
5493 struct sk_buff
*skb
;
5494 struct net
*net
= dev_net(idev
->dev
);
5497 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
5501 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
5503 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
5504 WARN_ON(err
== -EMSGSIZE
);
5508 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
5512 rtnl_set_sk_err(net
, RTNLGRP_IPV6_PREFIX
, err
);
5515 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
5517 struct net
*net
= dev_net(ifp
->idev
->dev
);
5522 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
5527 * If the address was optimistic
5528 * we inserted the route at the start of
5529 * our DAD process, so we don't need
5532 if (!rcu_access_pointer(ifp
->rt
->rt6i_node
))
5533 ip6_ins_rt(ifp
->rt
);
5534 if (ifp
->idev
->cnf
.forwarding
)
5535 addrconf_join_anycast(ifp
);
5536 if (!ipv6_addr_any(&ifp
->peer_addr
))
5537 addrconf_prefix_route(&ifp
->peer_addr
, 128,
5538 ifp
->idev
->dev
, 0, 0);
5541 if (ifp
->idev
->cnf
.forwarding
)
5542 addrconf_leave_anycast(ifp
);
5543 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
5544 if (!ipv6_addr_any(&ifp
->peer_addr
)) {
5545 struct rt6_info
*rt
;
5547 rt
= addrconf_get_prefix_route(&ifp
->peer_addr
, 128,
5548 ifp
->idev
->dev
, 0, 0);
5553 if (dst_hold_safe(&ifp
->rt
->dst
))
5554 ip6_del_rt(ifp
->rt
);
5556 rt_genid_bump_ipv6(net
);
5559 atomic_inc(&net
->ipv6
.dev_addr_genid
);
5562 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
5565 if (likely(ifp
->idev
->dead
== 0))
5566 __ipv6_ifa_notify(event
, ifp
);
5567 rcu_read_unlock_bh();
5570 #ifdef CONFIG_SYSCTL
5573 int addrconf_sysctl_forward(struct ctl_table
*ctl
, int write
,
5574 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
5576 int *valp
= ctl
->data
;
5579 struct ctl_table lctl
;
5583 * ctl->data points to idev->cnf.forwarding, we should
5584 * not modify it until we get the rtnl lock.
5589 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
5592 ret
= addrconf_fixup_forwarding(ctl
, valp
, val
);
5599 int addrconf_sysctl_mtu(struct ctl_table
*ctl
, int write
,
5600 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
5602 struct inet6_dev
*idev
= ctl
->extra1
;
5603 int min_mtu
= IPV6_MIN_MTU
;
5604 struct ctl_table lctl
;
5607 lctl
.extra1
= &min_mtu
;
5608 lctl
.extra2
= idev
? &idev
->dev
->mtu
: NULL
;
5610 return proc_dointvec_minmax(&lctl
, write
, buffer
, lenp
, ppos
);
5613 static void dev_disable_change(struct inet6_dev
*idev
)
5615 struct netdev_notifier_info info
;
5617 if (!idev
|| !idev
->dev
)
5620 netdev_notifier_info_init(&info
, idev
->dev
);
5621 if (idev
->cnf
.disable_ipv6
)
5622 addrconf_notify(NULL
, NETDEV_DOWN
, &info
);
5624 addrconf_notify(NULL
, NETDEV_UP
, &info
);
5627 static void addrconf_disable_change(struct net
*net
, __s32 newf
)
5629 struct net_device
*dev
;
5630 struct inet6_dev
*idev
;
5632 for_each_netdev(net
, dev
) {
5633 idev
= __in6_dev_get(dev
);
5635 int changed
= (!idev
->cnf
.disable_ipv6
) ^ (!newf
);
5636 idev
->cnf
.disable_ipv6
= newf
;
5638 dev_disable_change(idev
);
5643 static int addrconf_disable_ipv6(struct ctl_table
*table
, int *p
, int newf
)
5648 if (!rtnl_trylock())
5649 return restart_syscall();
5651 net
= (struct net
*)table
->extra2
;
5655 if (p
== &net
->ipv6
.devconf_dflt
->disable_ipv6
) {
5660 if (p
== &net
->ipv6
.devconf_all
->disable_ipv6
) {
5661 net
->ipv6
.devconf_dflt
->disable_ipv6
= newf
;
5662 addrconf_disable_change(net
, newf
);
5663 } else if ((!newf
) ^ (!old
))
5664 dev_disable_change((struct inet6_dev
*)table
->extra1
);
5671 int addrconf_sysctl_disable(struct ctl_table
*ctl
, int write
,
5672 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
5674 int *valp
= ctl
->data
;
5677 struct ctl_table lctl
;
5681 * ctl->data points to idev->cnf.disable_ipv6, we should
5682 * not modify it until we get the rtnl lock.
5687 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
5690 ret
= addrconf_disable_ipv6(ctl
, valp
, val
);
5697 int addrconf_sysctl_proxy_ndp(struct ctl_table
*ctl
, int write
,
5698 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
5700 int *valp
= ctl
->data
;
5705 ret
= proc_dointvec(ctl
, write
, buffer
, lenp
, ppos
);
5708 if (write
&& old
!= new) {
5709 struct net
*net
= ctl
->extra2
;
5711 if (!rtnl_trylock())
5712 return restart_syscall();
5714 if (valp
== &net
->ipv6
.devconf_dflt
->proxy_ndp
)
5715 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
5716 NETCONFA_PROXY_NEIGH
,
5717 NETCONFA_IFINDEX_DEFAULT
,
5718 net
->ipv6
.devconf_dflt
);
5719 else if (valp
== &net
->ipv6
.devconf_all
->proxy_ndp
)
5720 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
5721 NETCONFA_PROXY_NEIGH
,
5722 NETCONFA_IFINDEX_ALL
,
5723 net
->ipv6
.devconf_all
);
5725 struct inet6_dev
*idev
= ctl
->extra1
;
5727 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
5728 NETCONFA_PROXY_NEIGH
,
5738 static int addrconf_sysctl_addr_gen_mode(struct ctl_table
*ctl
, int write
,
5739 void __user
*buffer
, size_t *lenp
,
5744 struct inet6_dev
*idev
= (struct inet6_dev
*)ctl
->extra1
;
5745 struct net
*net
= (struct net
*)ctl
->extra2
;
5747 if (!rtnl_trylock())
5748 return restart_syscall();
5750 ret
= proc_dointvec(ctl
, write
, buffer
, lenp
, ppos
);
5753 new_val
= *((int *)ctl
->data
);
5755 if (check_addr_gen_mode(new_val
) < 0) {
5760 /* request for default */
5761 if (&net
->ipv6
.devconf_dflt
->addr_gen_mode
== ctl
->data
) {
5762 ipv6_devconf_dflt
.addr_gen_mode
= new_val
;
5764 /* request for individual net device */
5769 if (check_stable_privacy(idev
, net
, new_val
) < 0) {
5774 if (idev
->cnf
.addr_gen_mode
!= new_val
) {
5775 idev
->cnf
.addr_gen_mode
= new_val
;
5776 addrconf_dev_config(idev
->dev
);
5787 static int addrconf_sysctl_stable_secret(struct ctl_table
*ctl
, int write
,
5788 void __user
*buffer
, size_t *lenp
,
5792 struct in6_addr addr
;
5793 char str
[IPV6_MAX_STRLEN
];
5794 struct ctl_table lctl
= *ctl
;
5795 struct net
*net
= ctl
->extra2
;
5796 struct ipv6_stable_secret
*secret
= ctl
->data
;
5798 if (&net
->ipv6
.devconf_all
->stable_secret
== ctl
->data
)
5801 lctl
.maxlen
= IPV6_MAX_STRLEN
;
5804 if (!rtnl_trylock())
5805 return restart_syscall();
5807 if (!write
&& !secret
->initialized
) {
5812 err
= snprintf(str
, sizeof(str
), "%pI6", &secret
->secret
);
5813 if (err
>= sizeof(str
)) {
5818 err
= proc_dostring(&lctl
, write
, buffer
, lenp
, ppos
);
5822 if (in6_pton(str
, -1, addr
.in6_u
.u6_addr8
, -1, NULL
) != 1) {
5827 secret
->initialized
= true;
5828 secret
->secret
= addr
;
5830 if (&net
->ipv6
.devconf_dflt
->stable_secret
== ctl
->data
) {
5831 struct net_device
*dev
;
5833 for_each_netdev(net
, dev
) {
5834 struct inet6_dev
*idev
= __in6_dev_get(dev
);
5837 idev
->cnf
.addr_gen_mode
=
5838 IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
5842 struct inet6_dev
*idev
= ctl
->extra1
;
5844 idev
->cnf
.addr_gen_mode
= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
5854 int addrconf_sysctl_ignore_routes_with_linkdown(struct ctl_table
*ctl
,
5856 void __user
*buffer
,
5860 int *valp
= ctl
->data
;
5863 struct ctl_table lctl
;
5866 /* ctl->data points to idev->cnf.ignore_routes_when_linkdown
5867 * we should not modify it until we get the rtnl lock.
5872 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
5875 ret
= addrconf_fixup_linkdown(ctl
, valp
, val
);
5882 void addrconf_set_nopolicy(struct rt6_info
*rt
, int action
)
5886 rt
->dst
.flags
|= DST_NOPOLICY
;
5888 rt
->dst
.flags
&= ~DST_NOPOLICY
;
5893 void addrconf_disable_policy_idev(struct inet6_dev
*idev
, int val
)
5895 struct inet6_ifaddr
*ifa
;
5897 read_lock_bh(&idev
->lock
);
5898 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
5899 spin_lock(&ifa
->lock
);
5901 struct rt6_info
*rt
= ifa
->rt
;
5902 struct fib6_table
*table
= rt
->rt6i_table
;
5905 read_lock(&table
->tb6_lock
);
5906 addrconf_set_nopolicy(ifa
->rt
, val
);
5907 if (rt
->rt6i_pcpu
) {
5908 for_each_possible_cpu(cpu
) {
5909 struct rt6_info
**rtp
;
5911 rtp
= per_cpu_ptr(rt
->rt6i_pcpu
, cpu
);
5912 addrconf_set_nopolicy(*rtp
, val
);
5915 read_unlock(&table
->tb6_lock
);
5917 spin_unlock(&ifa
->lock
);
5919 read_unlock_bh(&idev
->lock
);
5923 int addrconf_disable_policy(struct ctl_table
*ctl
, int *valp
, int val
)
5925 struct inet6_dev
*idev
;
5928 if (!rtnl_trylock())
5929 return restart_syscall();
5933 net
= (struct net
*)ctl
->extra2
;
5934 if (valp
== &net
->ipv6
.devconf_dflt
->disable_policy
) {
5939 if (valp
== &net
->ipv6
.devconf_all
->disable_policy
) {
5940 struct net_device
*dev
;
5942 for_each_netdev(net
, dev
) {
5943 idev
= __in6_dev_get(dev
);
5945 addrconf_disable_policy_idev(idev
, val
);
5948 idev
= (struct inet6_dev
*)ctl
->extra1
;
5949 addrconf_disable_policy_idev(idev
, val
);
5957 int addrconf_sysctl_disable_policy(struct ctl_table
*ctl
, int write
,
5958 void __user
*buffer
, size_t *lenp
,
5961 int *valp
= ctl
->data
;
5964 struct ctl_table lctl
;
5969 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
5971 if (write
&& (*valp
!= val
))
5972 ret
= addrconf_disable_policy(ctl
, valp
, val
);
5980 static int minus_one
= -1;
5981 static const int one
= 1;
5982 static const int two_five_five
= 255;
5984 static const struct ctl_table addrconf_sysctl
[] = {
5986 .procname
= "forwarding",
5987 .data
= &ipv6_devconf
.forwarding
,
5988 .maxlen
= sizeof(int),
5990 .proc_handler
= addrconf_sysctl_forward
,
5993 .procname
= "hop_limit",
5994 .data
= &ipv6_devconf
.hop_limit
,
5995 .maxlen
= sizeof(int),
5997 .proc_handler
= proc_dointvec_minmax
,
5998 .extra1
= (void *)&one
,
5999 .extra2
= (void *)&two_five_five
,
6003 .data
= &ipv6_devconf
.mtu6
,
6004 .maxlen
= sizeof(int),
6006 .proc_handler
= addrconf_sysctl_mtu
,
6009 .procname
= "accept_ra",
6010 .data
= &ipv6_devconf
.accept_ra
,
6011 .maxlen
= sizeof(int),
6013 .proc_handler
= proc_dointvec
,
6016 .procname
= "accept_redirects",
6017 .data
= &ipv6_devconf
.accept_redirects
,
6018 .maxlen
= sizeof(int),
6020 .proc_handler
= proc_dointvec
,
6023 .procname
= "autoconf",
6024 .data
= &ipv6_devconf
.autoconf
,
6025 .maxlen
= sizeof(int),
6027 .proc_handler
= proc_dointvec
,
6030 .procname
= "dad_transmits",
6031 .data
= &ipv6_devconf
.dad_transmits
,
6032 .maxlen
= sizeof(int),
6034 .proc_handler
= proc_dointvec
,
6037 .procname
= "router_solicitations",
6038 .data
= &ipv6_devconf
.rtr_solicits
,
6039 .maxlen
= sizeof(int),
6041 .proc_handler
= proc_dointvec_minmax
,
6042 .extra1
= &minus_one
,
6045 .procname
= "router_solicitation_interval",
6046 .data
= &ipv6_devconf
.rtr_solicit_interval
,
6047 .maxlen
= sizeof(int),
6049 .proc_handler
= proc_dointvec_jiffies
,
6052 .procname
= "router_solicitation_max_interval",
6053 .data
= &ipv6_devconf
.rtr_solicit_max_interval
,
6054 .maxlen
= sizeof(int),
6056 .proc_handler
= proc_dointvec_jiffies
,
6059 .procname
= "router_solicitation_delay",
6060 .data
= &ipv6_devconf
.rtr_solicit_delay
,
6061 .maxlen
= sizeof(int),
6063 .proc_handler
= proc_dointvec_jiffies
,
6066 .procname
= "force_mld_version",
6067 .data
= &ipv6_devconf
.force_mld_version
,
6068 .maxlen
= sizeof(int),
6070 .proc_handler
= proc_dointvec
,
6073 .procname
= "mldv1_unsolicited_report_interval",
6075 &ipv6_devconf
.mldv1_unsolicited_report_interval
,
6076 .maxlen
= sizeof(int),
6078 .proc_handler
= proc_dointvec_ms_jiffies
,
6081 .procname
= "mldv2_unsolicited_report_interval",
6083 &ipv6_devconf
.mldv2_unsolicited_report_interval
,
6084 .maxlen
= sizeof(int),
6086 .proc_handler
= proc_dointvec_ms_jiffies
,
6089 .procname
= "use_tempaddr",
6090 .data
= &ipv6_devconf
.use_tempaddr
,
6091 .maxlen
= sizeof(int),
6093 .proc_handler
= proc_dointvec
,
6096 .procname
= "temp_valid_lft",
6097 .data
= &ipv6_devconf
.temp_valid_lft
,
6098 .maxlen
= sizeof(int),
6100 .proc_handler
= proc_dointvec
,
6103 .procname
= "temp_prefered_lft",
6104 .data
= &ipv6_devconf
.temp_prefered_lft
,
6105 .maxlen
= sizeof(int),
6107 .proc_handler
= proc_dointvec
,
6110 .procname
= "regen_max_retry",
6111 .data
= &ipv6_devconf
.regen_max_retry
,
6112 .maxlen
= sizeof(int),
6114 .proc_handler
= proc_dointvec
,
6117 .procname
= "max_desync_factor",
6118 .data
= &ipv6_devconf
.max_desync_factor
,
6119 .maxlen
= sizeof(int),
6121 .proc_handler
= proc_dointvec
,
6124 .procname
= "max_addresses",
6125 .data
= &ipv6_devconf
.max_addresses
,
6126 .maxlen
= sizeof(int),
6128 .proc_handler
= proc_dointvec
,
6131 .procname
= "accept_ra_defrtr",
6132 .data
= &ipv6_devconf
.accept_ra_defrtr
,
6133 .maxlen
= sizeof(int),
6135 .proc_handler
= proc_dointvec
,
6138 .procname
= "accept_ra_min_hop_limit",
6139 .data
= &ipv6_devconf
.accept_ra_min_hop_limit
,
6140 .maxlen
= sizeof(int),
6142 .proc_handler
= proc_dointvec
,
6145 .procname
= "accept_ra_pinfo",
6146 .data
= &ipv6_devconf
.accept_ra_pinfo
,
6147 .maxlen
= sizeof(int),
6149 .proc_handler
= proc_dointvec
,
6151 #ifdef CONFIG_IPV6_ROUTER_PREF
6153 .procname
= "accept_ra_rtr_pref",
6154 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
6155 .maxlen
= sizeof(int),
6157 .proc_handler
= proc_dointvec
,
6160 .procname
= "router_probe_interval",
6161 .data
= &ipv6_devconf
.rtr_probe_interval
,
6162 .maxlen
= sizeof(int),
6164 .proc_handler
= proc_dointvec_jiffies
,
6166 #ifdef CONFIG_IPV6_ROUTE_INFO
6168 .procname
= "accept_ra_rt_info_min_plen",
6169 .data
= &ipv6_devconf
.accept_ra_rt_info_min_plen
,
6170 .maxlen
= sizeof(int),
6172 .proc_handler
= proc_dointvec
,
6175 .procname
= "accept_ra_rt_info_max_plen",
6176 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
6177 .maxlen
= sizeof(int),
6179 .proc_handler
= proc_dointvec
,
6184 .procname
= "proxy_ndp",
6185 .data
= &ipv6_devconf
.proxy_ndp
,
6186 .maxlen
= sizeof(int),
6188 .proc_handler
= addrconf_sysctl_proxy_ndp
,
6191 .procname
= "accept_source_route",
6192 .data
= &ipv6_devconf
.accept_source_route
,
6193 .maxlen
= sizeof(int),
6195 .proc_handler
= proc_dointvec
,
6197 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
6199 .procname
= "optimistic_dad",
6200 .data
= &ipv6_devconf
.optimistic_dad
,
6201 .maxlen
= sizeof(int),
6203 .proc_handler
= proc_dointvec
,
6206 .procname
= "use_optimistic",
6207 .data
= &ipv6_devconf
.use_optimistic
,
6208 .maxlen
= sizeof(int),
6210 .proc_handler
= proc_dointvec
,
6213 #ifdef CONFIG_IPV6_MROUTE
6215 .procname
= "mc_forwarding",
6216 .data
= &ipv6_devconf
.mc_forwarding
,
6217 .maxlen
= sizeof(int),
6219 .proc_handler
= proc_dointvec
,
6223 .procname
= "disable_ipv6",
6224 .data
= &ipv6_devconf
.disable_ipv6
,
6225 .maxlen
= sizeof(int),
6227 .proc_handler
= addrconf_sysctl_disable
,
6230 .procname
= "accept_dad",
6231 .data
= &ipv6_devconf
.accept_dad
,
6232 .maxlen
= sizeof(int),
6234 .proc_handler
= proc_dointvec
,
6237 .procname
= "force_tllao",
6238 .data
= &ipv6_devconf
.force_tllao
,
6239 .maxlen
= sizeof(int),
6241 .proc_handler
= proc_dointvec
6244 .procname
= "ndisc_notify",
6245 .data
= &ipv6_devconf
.ndisc_notify
,
6246 .maxlen
= sizeof(int),
6248 .proc_handler
= proc_dointvec
6251 .procname
= "suppress_frag_ndisc",
6252 .data
= &ipv6_devconf
.suppress_frag_ndisc
,
6253 .maxlen
= sizeof(int),
6255 .proc_handler
= proc_dointvec
6258 .procname
= "accept_ra_from_local",
6259 .data
= &ipv6_devconf
.accept_ra_from_local
,
6260 .maxlen
= sizeof(int),
6262 .proc_handler
= proc_dointvec
,
6265 .procname
= "accept_ra_mtu",
6266 .data
= &ipv6_devconf
.accept_ra_mtu
,
6267 .maxlen
= sizeof(int),
6269 .proc_handler
= proc_dointvec
,
6272 .procname
= "stable_secret",
6273 .data
= &ipv6_devconf
.stable_secret
,
6274 .maxlen
= IPV6_MAX_STRLEN
,
6276 .proc_handler
= addrconf_sysctl_stable_secret
,
6279 .procname
= "use_oif_addrs_only",
6280 .data
= &ipv6_devconf
.use_oif_addrs_only
,
6281 .maxlen
= sizeof(int),
6283 .proc_handler
= proc_dointvec
,
6286 .procname
= "ignore_routes_with_linkdown",
6287 .data
= &ipv6_devconf
.ignore_routes_with_linkdown
,
6288 .maxlen
= sizeof(int),
6290 .proc_handler
= addrconf_sysctl_ignore_routes_with_linkdown
,
6293 .procname
= "drop_unicast_in_l2_multicast",
6294 .data
= &ipv6_devconf
.drop_unicast_in_l2_multicast
,
6295 .maxlen
= sizeof(int),
6297 .proc_handler
= proc_dointvec
,
6300 .procname
= "drop_unsolicited_na",
6301 .data
= &ipv6_devconf
.drop_unsolicited_na
,
6302 .maxlen
= sizeof(int),
6304 .proc_handler
= proc_dointvec
,
6307 .procname
= "keep_addr_on_down",
6308 .data
= &ipv6_devconf
.keep_addr_on_down
,
6309 .maxlen
= sizeof(int),
6311 .proc_handler
= proc_dointvec
,
6315 .procname
= "seg6_enabled",
6316 .data
= &ipv6_devconf
.seg6_enabled
,
6317 .maxlen
= sizeof(int),
6319 .proc_handler
= proc_dointvec
,
6321 #ifdef CONFIG_IPV6_SEG6_HMAC
6323 .procname
= "seg6_require_hmac",
6324 .data
= &ipv6_devconf
.seg6_require_hmac
,
6325 .maxlen
= sizeof(int),
6327 .proc_handler
= proc_dointvec
,
6331 .procname
= "enhanced_dad",
6332 .data
= &ipv6_devconf
.enhanced_dad
,
6333 .maxlen
= sizeof(int),
6335 .proc_handler
= proc_dointvec
,
6338 .procname
= "addr_gen_mode",
6339 .data
= &ipv6_devconf
.addr_gen_mode
,
6340 .maxlen
= sizeof(int),
6342 .proc_handler
= addrconf_sysctl_addr_gen_mode
,
6345 .procname
= "disable_policy",
6346 .data
= &ipv6_devconf
.disable_policy
,
6347 .maxlen
= sizeof(int),
6349 .proc_handler
= addrconf_sysctl_disable_policy
,
6356 static int __addrconf_sysctl_register(struct net
*net
, char *dev_name
,
6357 struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
6360 struct ctl_table
*table
;
6361 char path
[sizeof("net/ipv6/conf/") + IFNAMSIZ
];
6363 table
= kmemdup(addrconf_sysctl
, sizeof(addrconf_sysctl
), GFP_KERNEL
);
6367 for (i
= 0; table
[i
].data
; i
++) {
6368 table
[i
].data
+= (char *)p
- (char *)&ipv6_devconf
;
6369 /* If one of these is already set, then it is not safe to
6370 * overwrite either of them: this makes proc_dointvec_minmax
6373 if (!table
[i
].extra1
&& !table
[i
].extra2
) {
6374 table
[i
].extra1
= idev
; /* embedded; no ref */
6375 table
[i
].extra2
= net
;
6379 snprintf(path
, sizeof(path
), "net/ipv6/conf/%s", dev_name
);
6381 p
->sysctl_header
= register_net_sysctl(net
, path
, table
);
6382 if (!p
->sysctl_header
)
6385 if (!strcmp(dev_name
, "all"))
6386 ifindex
= NETCONFA_IFINDEX_ALL
;
6387 else if (!strcmp(dev_name
, "default"))
6388 ifindex
= NETCONFA_IFINDEX_DEFAULT
;
6390 ifindex
= idev
->dev
->ifindex
;
6391 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
, NETCONFA_ALL
,
6401 static void __addrconf_sysctl_unregister(struct net
*net
,
6402 struct ipv6_devconf
*p
, int ifindex
)
6404 struct ctl_table
*table
;
6406 if (!p
->sysctl_header
)
6409 table
= p
->sysctl_header
->ctl_table_arg
;
6410 unregister_net_sysctl_table(p
->sysctl_header
);
6411 p
->sysctl_header
= NULL
;
6414 inet6_netconf_notify_devconf(net
, RTM_DELNETCONF
, 0, ifindex
, NULL
);
6417 static int addrconf_sysctl_register(struct inet6_dev
*idev
)
6421 if (!sysctl_dev_name_is_allowed(idev
->dev
->name
))
6424 err
= neigh_sysctl_register(idev
->dev
, idev
->nd_parms
,
6425 &ndisc_ifinfo_sysctl_change
);
6428 err
= __addrconf_sysctl_register(dev_net(idev
->dev
), idev
->dev
->name
,
6431 neigh_sysctl_unregister(idev
->nd_parms
);
6436 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
6438 __addrconf_sysctl_unregister(dev_net(idev
->dev
), &idev
->cnf
,
6439 idev
->dev
->ifindex
);
6440 neigh_sysctl_unregister(idev
->nd_parms
);
6446 static int __net_init
addrconf_init_net(struct net
*net
)
6449 struct ipv6_devconf
*all
, *dflt
;
6451 all
= kmemdup(&ipv6_devconf
, sizeof(ipv6_devconf
), GFP_KERNEL
);
6455 dflt
= kmemdup(&ipv6_devconf_dflt
, sizeof(ipv6_devconf_dflt
), GFP_KERNEL
);
6457 goto err_alloc_dflt
;
6459 /* these will be inherited by all namespaces */
6460 dflt
->autoconf
= ipv6_defaults
.autoconf
;
6461 dflt
->disable_ipv6
= ipv6_defaults
.disable_ipv6
;
6463 dflt
->stable_secret
.initialized
= false;
6464 all
->stable_secret
.initialized
= false;
6466 net
->ipv6
.devconf_all
= all
;
6467 net
->ipv6
.devconf_dflt
= dflt
;
6469 #ifdef CONFIG_SYSCTL
6470 err
= __addrconf_sysctl_register(net
, "all", NULL
, all
);
6474 err
= __addrconf_sysctl_register(net
, "default", NULL
, dflt
);
6480 #ifdef CONFIG_SYSCTL
6482 __addrconf_sysctl_unregister(net
, all
, NETCONFA_IFINDEX_ALL
);
6492 static void __net_exit
addrconf_exit_net(struct net
*net
)
6494 #ifdef CONFIG_SYSCTL
6495 __addrconf_sysctl_unregister(net
, net
->ipv6
.devconf_dflt
,
6496 NETCONFA_IFINDEX_DEFAULT
);
6497 __addrconf_sysctl_unregister(net
, net
->ipv6
.devconf_all
,
6498 NETCONFA_IFINDEX_ALL
);
6500 kfree(net
->ipv6
.devconf_dflt
);
6501 kfree(net
->ipv6
.devconf_all
);
6504 static struct pernet_operations addrconf_ops
= {
6505 .init
= addrconf_init_net
,
6506 .exit
= addrconf_exit_net
,
6509 static struct rtnl_af_ops inet6_ops __read_mostly
= {
6511 .fill_link_af
= inet6_fill_link_af
,
6512 .get_link_af_size
= inet6_get_link_af_size
,
6513 .validate_link_af
= inet6_validate_link_af
,
6514 .set_link_af
= inet6_set_link_af
,
6518 * Init / cleanup code
6521 int __init
addrconf_init(void)
6523 struct inet6_dev
*idev
;
6526 err
= ipv6_addr_label_init();
6528 pr_crit("%s: cannot initialize default policy table: %d\n",
6533 err
= register_pernet_subsys(&addrconf_ops
);
6537 addrconf_wq
= create_workqueue("ipv6_addrconf");
6543 /* The addrconf netdev notifier requires that loopback_dev
6544 * has it's ipv6 private information allocated and setup
6545 * before it can bring up and give link-local addresses
6546 * to other devices which are up.
6548 * Unfortunately, loopback_dev is not necessarily the first
6549 * entry in the global dev_base list of net devices. In fact,
6550 * it is likely to be the very last entry on that list.
6551 * So this causes the notifier registry below to try and
6552 * give link-local addresses to all devices besides loopback_dev
6553 * first, then loopback_dev, which cases all the non-loopback_dev
6554 * devices to fail to get a link-local address.
6556 * So, as a temporary fix, allocate the ipv6 structure for
6557 * loopback_dev first by hand.
6558 * Longer term, all of the dependencies ipv6 has upon the loopback
6559 * device and it being up should be removed.
6562 idev
= ipv6_add_dev(init_net
.loopback_dev
);
6565 err
= PTR_ERR(idev
);
6569 ip6_route_init_special_entries();
6571 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
6572 INIT_HLIST_HEAD(&inet6_addr_lst
[i
]);
6574 register_netdevice_notifier(&ipv6_dev_notf
);
6578 rtnl_af_register(&inet6_ops
);
6580 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
,
6585 /* Only the first call to __rtnl_register can fail */
6586 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
, 0);
6587 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
, 0);
6588 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
,
6589 inet6_dump_ifaddr
, 0);
6590 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
,
6591 inet6_dump_ifmcaddr
, 0);
6592 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
,
6593 inet6_dump_ifacaddr
, 0);
6594 __rtnl_register(PF_INET6
, RTM_GETNETCONF
, inet6_netconf_get_devconf
,
6595 inet6_netconf_dump_devconf
, 0);
6597 ipv6_addr_label_rtnl_register();
6601 rtnl_af_unregister(&inet6_ops
);
6602 unregister_netdevice_notifier(&ipv6_dev_notf
);
6604 destroy_workqueue(addrconf_wq
);
6606 unregister_pernet_subsys(&addrconf_ops
);
6608 ipv6_addr_label_cleanup();
6613 void addrconf_cleanup(void)
6615 struct net_device
*dev
;
6618 unregister_netdevice_notifier(&ipv6_dev_notf
);
6619 unregister_pernet_subsys(&addrconf_ops
);
6620 ipv6_addr_label_cleanup();
6624 __rtnl_af_unregister(&inet6_ops
);
6626 /* clean dev list */
6627 for_each_netdev(&init_net
, dev
) {
6628 if (__in6_dev_get(dev
) == NULL
)
6630 addrconf_ifdown(dev
, 1);
6632 addrconf_ifdown(init_net
.loopback_dev
, 2);
6637 spin_lock_bh(&addrconf_hash_lock
);
6638 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
6639 WARN_ON(!hlist_empty(&inet6_addr_lst
[i
]));
6640 spin_unlock_bh(&addrconf_hash_lock
);
6641 cancel_delayed_work(&addr_chk_work
);
6644 destroy_workqueue(addrconf_wq
);