1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * IPv6 Address [auto]configuration
4 * Linux INET6 implementation
7 * Pedro Roque <roque@di.fc.ul.pt>
8 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
14 * Janos Farkas : delete timer on ifdown
15 * <chexum@bankinf.banki.hu>
16 * Andi Kleen : kill double kfree on module
18 * Maciej W. Rozycki : FDDI support
19 * sekiya@USAGI : Don't send too many RS
21 * yoshfuji@USAGI : Fixed interval between DAD
23 * YOSHIFUJI Hideaki @USAGI : improved accuracy of
24 * address validation timer.
25 * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
27 * Yuji SEKIYA @USAGI : Don't assign a same IPv6
28 * address on a same interface.
29 * YOSHIFUJI Hideaki @USAGI : ARCnet support
30 * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
32 * YOSHIFUJI Hideaki @USAGI : improved source address
33 * selection; consider scope,
37 #define pr_fmt(fmt) "IPv6: " fmt
39 #include <linux/errno.h>
40 #include <linux/types.h>
41 #include <linux/kernel.h>
42 #include <linux/sched/signal.h>
43 #include <linux/socket.h>
44 #include <linux/sockios.h>
45 #include <linux/net.h>
46 #include <linux/inet.h>
47 #include <linux/in6.h>
48 #include <linux/netdevice.h>
49 #include <linux/if_addr.h>
50 #include <linux/if_arp.h>
51 #include <linux/if_arcnet.h>
52 #include <linux/if_infiniband.h>
53 #include <linux/route.h>
54 #include <linux/inetdevice.h>
55 #include <linux/init.h>
56 #include <linux/slab.h>
58 #include <linux/sysctl.h>
60 #include <linux/capability.h>
61 #include <linux/delay.h>
62 #include <linux/notifier.h>
63 #include <linux/string.h>
64 #include <linux/hash.h>
66 #include <net/net_namespace.h>
70 #include <net/6lowpan.h>
71 #include <net/firewire.h>
73 #include <net/protocol.h>
74 #include <net/ndisc.h>
75 #include <net/ip6_route.h>
76 #include <net/addrconf.h>
79 #include <net/netlink.h>
80 #include <net/pkt_sched.h>
81 #include <net/l3mdev.h>
82 #include <linux/if_tunnel.h>
83 #include <linux/rtnetlink.h>
84 #include <linux/netconf.h>
85 #include <linux/random.h>
86 #include <linux/uaccess.h>
87 #include <asm/unaligned.h>
89 #include <linux/proc_fs.h>
90 #include <linux/seq_file.h>
91 #include <linux/export.h>
93 #define INFINITY_LIFE_TIME 0xFFFFFFFF
95 #define IPV6_MAX_STRLEN \
96 sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255")
98 static inline u32
cstamp_delta(unsigned long cstamp
)
100 return (cstamp
- INITIAL_JIFFIES
) * 100UL / HZ
;
103 static inline s32
rfc3315_s14_backoff_init(s32 irt
)
105 /* multiply 'initial retransmission time' by 0.9 .. 1.1 */
106 u64 tmp
= (900000 + prandom_u32() % 200001) * (u64
)irt
;
107 do_div(tmp
, 1000000);
111 static inline s32
rfc3315_s14_backoff_update(s32 rt
, s32 mrt
)
113 /* multiply 'retransmission timeout' by 1.9 .. 2.1 */
114 u64 tmp
= (1900000 + prandom_u32() % 200001) * (u64
)rt
;
115 do_div(tmp
, 1000000);
116 if ((s32
)tmp
> mrt
) {
117 /* multiply 'maximum retransmission time' by 0.9 .. 1.1 */
118 tmp
= (900000 + prandom_u32() % 200001) * (u64
)mrt
;
119 do_div(tmp
, 1000000);
125 static int addrconf_sysctl_register(struct inet6_dev
*idev
);
126 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
);
128 static inline int addrconf_sysctl_register(struct inet6_dev
*idev
)
133 static inline void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
138 static void ipv6_regen_rndid(struct inet6_dev
*idev
);
139 static void ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
141 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
);
142 static int ipv6_count_addresses(const struct inet6_dev
*idev
);
143 static int ipv6_generate_stable_address(struct in6_addr
*addr
,
145 const struct inet6_dev
*idev
);
147 #define IN6_ADDR_HSIZE_SHIFT 8
148 #define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT)
150 * Configured unicast address hash table
152 static struct hlist_head inet6_addr_lst
[IN6_ADDR_HSIZE
];
153 static DEFINE_SPINLOCK(addrconf_hash_lock
);
155 static void addrconf_verify(void);
156 static void addrconf_verify_rtnl(void);
157 static void addrconf_verify_work(struct work_struct
*);
159 static struct workqueue_struct
*addrconf_wq
;
160 static DECLARE_DELAYED_WORK(addr_chk_work
, addrconf_verify_work
);
162 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
163 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
165 static void addrconf_type_change(struct net_device
*dev
,
166 unsigned long event
);
167 static int addrconf_ifdown(struct net_device
*dev
, int how
);
169 static struct fib6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
171 const struct net_device
*dev
,
172 u32 flags
, u32 noflags
,
175 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
);
176 static void addrconf_dad_work(struct work_struct
*w
);
177 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
, bool bump_id
,
179 static void addrconf_dad_run(struct inet6_dev
*idev
, bool restart
);
180 static void addrconf_rs_timer(struct timer_list
*t
);
181 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
182 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
184 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
185 struct prefix_info
*pinfo
);
187 static struct ipv6_devconf ipv6_devconf __read_mostly
= {
189 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
190 .mtu6
= IPV6_MIN_MTU
,
192 .accept_redirects
= 1,
194 .force_mld_version
= 0,
195 .mldv1_unsolicited_report_interval
= 10 * HZ
,
196 .mldv2_unsolicited_report_interval
= HZ
,
198 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
199 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
200 .rtr_solicit_max_interval
= RTR_SOLICITATION_MAX_INTERVAL
,
201 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
203 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
204 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
205 .regen_max_retry
= REGEN_MAX_RETRY
,
206 .max_desync_factor
= MAX_DESYNC_FACTOR
,
207 .max_addresses
= IPV6_MAX_ADDRESSES
,
208 .accept_ra_defrtr
= 1,
209 .accept_ra_from_local
= 0,
210 .accept_ra_min_hop_limit
= 1,
211 .accept_ra_pinfo
= 1,
212 #ifdef CONFIG_IPV6_ROUTER_PREF
213 .accept_ra_rtr_pref
= 1,
214 .rtr_probe_interval
= 60 * HZ
,
215 #ifdef CONFIG_IPV6_ROUTE_INFO
216 .accept_ra_rt_info_min_plen
= 0,
217 .accept_ra_rt_info_max_plen
= 0,
221 .accept_source_route
= 0, /* we do not accept RH0 by default. */
224 .suppress_frag_ndisc
= 1,
227 .initialized
= false,
229 .use_oif_addrs_only
= 0,
230 .ignore_routes_with_linkdown
= 0,
231 .keep_addr_on_down
= 0,
233 #ifdef CONFIG_IPV6_SEG6_HMAC
234 .seg6_require_hmac
= 0,
237 .addr_gen_mode
= IN6_ADDR_GEN_MODE_EUI64
,
241 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly
= {
243 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
244 .mtu6
= IPV6_MIN_MTU
,
246 .accept_redirects
= 1,
248 .force_mld_version
= 0,
249 .mldv1_unsolicited_report_interval
= 10 * HZ
,
250 .mldv2_unsolicited_report_interval
= HZ
,
252 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
253 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
254 .rtr_solicit_max_interval
= RTR_SOLICITATION_MAX_INTERVAL
,
255 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
257 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
258 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
259 .regen_max_retry
= REGEN_MAX_RETRY
,
260 .max_desync_factor
= MAX_DESYNC_FACTOR
,
261 .max_addresses
= IPV6_MAX_ADDRESSES
,
262 .accept_ra_defrtr
= 1,
263 .accept_ra_from_local
= 0,
264 .accept_ra_min_hop_limit
= 1,
265 .accept_ra_pinfo
= 1,
266 #ifdef CONFIG_IPV6_ROUTER_PREF
267 .accept_ra_rtr_pref
= 1,
268 .rtr_probe_interval
= 60 * HZ
,
269 #ifdef CONFIG_IPV6_ROUTE_INFO
270 .accept_ra_rt_info_min_plen
= 0,
271 .accept_ra_rt_info_max_plen
= 0,
275 .accept_source_route
= 0, /* we do not accept RH0 by default. */
278 .suppress_frag_ndisc
= 1,
281 .initialized
= false,
283 .use_oif_addrs_only
= 0,
284 .ignore_routes_with_linkdown
= 0,
285 .keep_addr_on_down
= 0,
287 #ifdef CONFIG_IPV6_SEG6_HMAC
288 .seg6_require_hmac
= 0,
291 .addr_gen_mode
= IN6_ADDR_GEN_MODE_EUI64
,
295 /* Check if link is ready: is it up and is a valid qdisc available */
296 static inline bool addrconf_link_ready(const struct net_device
*dev
)
298 return netif_oper_up(dev
) && !qdisc_tx_is_noop(dev
);
301 static void addrconf_del_rs_timer(struct inet6_dev
*idev
)
303 if (del_timer(&idev
->rs_timer
))
307 static void addrconf_del_dad_work(struct inet6_ifaddr
*ifp
)
309 if (cancel_delayed_work(&ifp
->dad_work
))
313 static void addrconf_mod_rs_timer(struct inet6_dev
*idev
,
316 if (!timer_pending(&idev
->rs_timer
))
318 mod_timer(&idev
->rs_timer
, jiffies
+ when
);
321 static void addrconf_mod_dad_work(struct inet6_ifaddr
*ifp
,
325 if (mod_delayed_work(addrconf_wq
, &ifp
->dad_work
, delay
))
329 static int snmp6_alloc_dev(struct inet6_dev
*idev
)
333 idev
->stats
.ipv6
= alloc_percpu(struct ipstats_mib
);
334 if (!idev
->stats
.ipv6
)
337 for_each_possible_cpu(i
) {
338 struct ipstats_mib
*addrconf_stats
;
339 addrconf_stats
= per_cpu_ptr(idev
->stats
.ipv6
, i
);
340 u64_stats_init(&addrconf_stats
->syncp
);
344 idev
->stats
.icmpv6dev
= kzalloc(sizeof(struct icmpv6_mib_device
),
346 if (!idev
->stats
.icmpv6dev
)
348 idev
->stats
.icmpv6msgdev
= kzalloc(sizeof(struct icmpv6msg_mib_device
),
350 if (!idev
->stats
.icmpv6msgdev
)
356 kfree(idev
->stats
.icmpv6dev
);
358 free_percpu(idev
->stats
.ipv6
);
363 static struct inet6_dev
*ipv6_add_dev(struct net_device
*dev
)
365 struct inet6_dev
*ndev
;
370 if (dev
->mtu
< IPV6_MIN_MTU
)
371 return ERR_PTR(-EINVAL
);
373 ndev
= kzalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
377 rwlock_init(&ndev
->lock
);
379 INIT_LIST_HEAD(&ndev
->addr_list
);
380 timer_setup(&ndev
->rs_timer
, addrconf_rs_timer
, 0);
381 memcpy(&ndev
->cnf
, dev_net(dev
)->ipv6
.devconf_dflt
, sizeof(ndev
->cnf
));
383 if (ndev
->cnf
.stable_secret
.initialized
)
384 ndev
->cnf
.addr_gen_mode
= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
386 ndev
->cnf
.mtu6
= dev
->mtu
;
387 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
388 if (!ndev
->nd_parms
) {
392 if (ndev
->cnf
.forwarding
)
393 dev_disable_lro(dev
);
394 /* We refer to the device */
397 if (snmp6_alloc_dev(ndev
) < 0) {
398 netdev_dbg(dev
, "%s: cannot allocate memory for statistics\n",
400 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
406 if (snmp6_register_dev(ndev
) < 0) {
407 netdev_dbg(dev
, "%s: cannot create /proc/net/dev_snmp6/%s\n",
408 __func__
, dev
->name
);
412 /* One reference from device. */
413 refcount_set(&ndev
->refcnt
, 1);
415 if (dev
->flags
& (IFF_NOARP
| IFF_LOOPBACK
))
416 ndev
->cnf
.accept_dad
= -1;
418 #if IS_ENABLED(CONFIG_IPV6_SIT)
419 if (dev
->type
== ARPHRD_SIT
&& (dev
->priv_flags
& IFF_ISATAP
)) {
420 pr_info("%s: Disabled Multicast RS\n", dev
->name
);
421 ndev
->cnf
.rtr_solicits
= 0;
425 INIT_LIST_HEAD(&ndev
->tempaddr_list
);
426 ndev
->desync_factor
= U32_MAX
;
427 if ((dev
->flags
&IFF_LOOPBACK
) ||
428 dev
->type
== ARPHRD_TUNNEL
||
429 dev
->type
== ARPHRD_TUNNEL6
||
430 dev
->type
== ARPHRD_SIT
||
431 dev
->type
== ARPHRD_NONE
) {
432 ndev
->cnf
.use_tempaddr
= -1;
434 ipv6_regen_rndid(ndev
);
436 ndev
->token
= in6addr_any
;
438 if (netif_running(dev
) && addrconf_link_ready(dev
))
439 ndev
->if_flags
|= IF_READY
;
441 ipv6_mc_init_dev(ndev
);
442 ndev
->tstamp
= jiffies
;
443 err
= addrconf_sysctl_register(ndev
);
445 ipv6_mc_destroy_dev(ndev
);
446 snmp6_unregister_dev(ndev
);
449 /* protected by rtnl_lock */
450 rcu_assign_pointer(dev
->ip6_ptr
, ndev
);
452 /* Join interface-local all-node multicast group */
453 ipv6_dev_mc_inc(dev
, &in6addr_interfacelocal_allnodes
);
455 /* Join all-node multicast group */
456 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allnodes
);
458 /* Join all-router multicast group if forwarding is set */
459 if (ndev
->cnf
.forwarding
&& (dev
->flags
& IFF_MULTICAST
))
460 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
465 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
467 in6_dev_finish_destroy(ndev
);
471 static struct inet6_dev
*ipv6_find_idev(struct net_device
*dev
)
473 struct inet6_dev
*idev
;
477 idev
= __in6_dev_get(dev
);
479 idev
= ipv6_add_dev(dev
);
484 if (dev
->flags
&IFF_UP
)
489 static int inet6_netconf_msgsize_devconf(int type
)
491 int size
= NLMSG_ALIGN(sizeof(struct netconfmsg
))
492 + nla_total_size(4); /* NETCONFA_IFINDEX */
495 if (type
== NETCONFA_ALL
)
498 if (all
|| type
== NETCONFA_FORWARDING
)
499 size
+= nla_total_size(4);
500 #ifdef CONFIG_IPV6_MROUTE
501 if (all
|| type
== NETCONFA_MC_FORWARDING
)
502 size
+= nla_total_size(4);
504 if (all
|| type
== NETCONFA_PROXY_NEIGH
)
505 size
+= nla_total_size(4);
507 if (all
|| type
== NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
)
508 size
+= nla_total_size(4);
513 static int inet6_netconf_fill_devconf(struct sk_buff
*skb
, int ifindex
,
514 struct ipv6_devconf
*devconf
, u32 portid
,
515 u32 seq
, int event
, unsigned int flags
,
518 struct nlmsghdr
*nlh
;
519 struct netconfmsg
*ncm
;
522 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct netconfmsg
),
527 if (type
== NETCONFA_ALL
)
530 ncm
= nlmsg_data(nlh
);
531 ncm
->ncm_family
= AF_INET6
;
533 if (nla_put_s32(skb
, NETCONFA_IFINDEX
, ifindex
) < 0)
534 goto nla_put_failure
;
539 if ((all
|| type
== NETCONFA_FORWARDING
) &&
540 nla_put_s32(skb
, NETCONFA_FORWARDING
, devconf
->forwarding
) < 0)
541 goto nla_put_failure
;
542 #ifdef CONFIG_IPV6_MROUTE
543 if ((all
|| type
== NETCONFA_MC_FORWARDING
) &&
544 nla_put_s32(skb
, NETCONFA_MC_FORWARDING
,
545 devconf
->mc_forwarding
) < 0)
546 goto nla_put_failure
;
548 if ((all
|| type
== NETCONFA_PROXY_NEIGH
) &&
549 nla_put_s32(skb
, NETCONFA_PROXY_NEIGH
, devconf
->proxy_ndp
) < 0)
550 goto nla_put_failure
;
552 if ((all
|| type
== NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
) &&
553 nla_put_s32(skb
, NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
,
554 devconf
->ignore_routes_with_linkdown
) < 0)
555 goto nla_put_failure
;
562 nlmsg_cancel(skb
, nlh
);
566 void inet6_netconf_notify_devconf(struct net
*net
, int event
, int type
,
567 int ifindex
, struct ipv6_devconf
*devconf
)
572 skb
= nlmsg_new(inet6_netconf_msgsize_devconf(type
), GFP_KERNEL
);
576 err
= inet6_netconf_fill_devconf(skb
, ifindex
, devconf
, 0, 0,
579 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
580 WARN_ON(err
== -EMSGSIZE
);
584 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_NETCONF
, NULL
, GFP_KERNEL
);
587 rtnl_set_sk_err(net
, RTNLGRP_IPV6_NETCONF
, err
);
590 static const struct nla_policy devconf_ipv6_policy
[NETCONFA_MAX
+1] = {
591 [NETCONFA_IFINDEX
] = { .len
= sizeof(int) },
592 [NETCONFA_FORWARDING
] = { .len
= sizeof(int) },
593 [NETCONFA_PROXY_NEIGH
] = { .len
= sizeof(int) },
594 [NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
] = { .len
= sizeof(int) },
597 static int inet6_netconf_valid_get_req(struct sk_buff
*skb
,
598 const struct nlmsghdr
*nlh
,
600 struct netlink_ext_ack
*extack
)
604 if (nlh
->nlmsg_len
< nlmsg_msg_size(sizeof(struct netconfmsg
))) {
605 NL_SET_ERR_MSG_MOD(extack
, "Invalid header for netconf get request");
609 if (!netlink_strict_get_check(skb
))
610 return nlmsg_parse_deprecated(nlh
, sizeof(struct netconfmsg
),
612 devconf_ipv6_policy
, extack
);
614 err
= nlmsg_parse_deprecated_strict(nlh
, sizeof(struct netconfmsg
),
616 devconf_ipv6_policy
, extack
);
620 for (i
= 0; i
<= NETCONFA_MAX
; i
++) {
625 case NETCONFA_IFINDEX
:
628 NL_SET_ERR_MSG_MOD(extack
, "Unsupported attribute in netconf get request");
636 static int inet6_netconf_get_devconf(struct sk_buff
*in_skb
,
637 struct nlmsghdr
*nlh
,
638 struct netlink_ext_ack
*extack
)
640 struct net
*net
= sock_net(in_skb
->sk
);
641 struct nlattr
*tb
[NETCONFA_MAX
+1];
642 struct inet6_dev
*in6_dev
= NULL
;
643 struct net_device
*dev
= NULL
;
645 struct ipv6_devconf
*devconf
;
649 err
= inet6_netconf_valid_get_req(in_skb
, nlh
, tb
, extack
);
653 if (!tb
[NETCONFA_IFINDEX
])
657 ifindex
= nla_get_s32(tb
[NETCONFA_IFINDEX
]);
659 case NETCONFA_IFINDEX_ALL
:
660 devconf
= net
->ipv6
.devconf_all
;
662 case NETCONFA_IFINDEX_DEFAULT
:
663 devconf
= net
->ipv6
.devconf_dflt
;
666 dev
= dev_get_by_index(net
, ifindex
);
669 in6_dev
= in6_dev_get(dev
);
672 devconf
= &in6_dev
->cnf
;
677 skb
= nlmsg_new(inet6_netconf_msgsize_devconf(NETCONFA_ALL
), GFP_KERNEL
);
681 err
= inet6_netconf_fill_devconf(skb
, ifindex
, devconf
,
682 NETLINK_CB(in_skb
).portid
,
683 nlh
->nlmsg_seq
, RTM_NEWNETCONF
, 0,
686 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
687 WARN_ON(err
== -EMSGSIZE
);
691 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).portid
);
694 in6_dev_put(in6_dev
);
700 static int inet6_netconf_dump_devconf(struct sk_buff
*skb
,
701 struct netlink_callback
*cb
)
703 const struct nlmsghdr
*nlh
= cb
->nlh
;
704 struct net
*net
= sock_net(skb
->sk
);
707 struct net_device
*dev
;
708 struct inet6_dev
*idev
;
709 struct hlist_head
*head
;
711 if (cb
->strict_check
) {
712 struct netlink_ext_ack
*extack
= cb
->extack
;
713 struct netconfmsg
*ncm
;
715 if (nlh
->nlmsg_len
< nlmsg_msg_size(sizeof(*ncm
))) {
716 NL_SET_ERR_MSG_MOD(extack
, "Invalid header for netconf dump request");
720 if (nlmsg_attrlen(nlh
, sizeof(*ncm
))) {
721 NL_SET_ERR_MSG_MOD(extack
, "Invalid data after header in netconf dump request");
727 s_idx
= idx
= cb
->args
[1];
729 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
731 head
= &net
->dev_index_head
[h
];
733 cb
->seq
= atomic_read(&net
->ipv6
.dev_addr_genid
) ^
735 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
738 idev
= __in6_dev_get(dev
);
742 if (inet6_netconf_fill_devconf(skb
, dev
->ifindex
,
744 NETLINK_CB(cb
->skb
).portid
,
752 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
758 if (h
== NETDEV_HASHENTRIES
) {
759 if (inet6_netconf_fill_devconf(skb
, NETCONFA_IFINDEX_ALL
,
760 net
->ipv6
.devconf_all
,
761 NETLINK_CB(cb
->skb
).portid
,
763 RTM_NEWNETCONF
, NLM_F_MULTI
,
769 if (h
== NETDEV_HASHENTRIES
+ 1) {
770 if (inet6_netconf_fill_devconf(skb
, NETCONFA_IFINDEX_DEFAULT
,
771 net
->ipv6
.devconf_dflt
,
772 NETLINK_CB(cb
->skb
).portid
,
774 RTM_NEWNETCONF
, NLM_F_MULTI
,
788 static void dev_forward_change(struct inet6_dev
*idev
)
790 struct net_device
*dev
;
791 struct inet6_ifaddr
*ifa
;
796 if (idev
->cnf
.forwarding
)
797 dev_disable_lro(dev
);
798 if (dev
->flags
& IFF_MULTICAST
) {
799 if (idev
->cnf
.forwarding
) {
800 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
801 ipv6_dev_mc_inc(dev
, &in6addr_interfacelocal_allrouters
);
802 ipv6_dev_mc_inc(dev
, &in6addr_sitelocal_allrouters
);
804 ipv6_dev_mc_dec(dev
, &in6addr_linklocal_allrouters
);
805 ipv6_dev_mc_dec(dev
, &in6addr_interfacelocal_allrouters
);
806 ipv6_dev_mc_dec(dev
, &in6addr_sitelocal_allrouters
);
810 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
811 if (ifa
->flags
&IFA_F_TENTATIVE
)
813 if (idev
->cnf
.forwarding
)
814 addrconf_join_anycast(ifa
);
816 addrconf_leave_anycast(ifa
);
818 inet6_netconf_notify_devconf(dev_net(dev
), RTM_NEWNETCONF
,
820 dev
->ifindex
, &idev
->cnf
);
824 static void addrconf_forward_change(struct net
*net
, __s32 newf
)
826 struct net_device
*dev
;
827 struct inet6_dev
*idev
;
829 for_each_netdev(net
, dev
) {
830 idev
= __in6_dev_get(dev
);
832 int changed
= (!idev
->cnf
.forwarding
) ^ (!newf
);
833 idev
->cnf
.forwarding
= newf
;
835 dev_forward_change(idev
);
840 static int addrconf_fixup_forwarding(struct ctl_table
*table
, int *p
, int newf
)
846 return restart_syscall();
848 net
= (struct net
*)table
->extra2
;
852 if (p
== &net
->ipv6
.devconf_dflt
->forwarding
) {
853 if ((!newf
) ^ (!old
))
854 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
856 NETCONFA_IFINDEX_DEFAULT
,
857 net
->ipv6
.devconf_dflt
);
862 if (p
== &net
->ipv6
.devconf_all
->forwarding
) {
863 int old_dflt
= net
->ipv6
.devconf_dflt
->forwarding
;
865 net
->ipv6
.devconf_dflt
->forwarding
= newf
;
866 if ((!newf
) ^ (!old_dflt
))
867 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
869 NETCONFA_IFINDEX_DEFAULT
,
870 net
->ipv6
.devconf_dflt
);
872 addrconf_forward_change(net
, newf
);
873 if ((!newf
) ^ (!old
))
874 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
876 NETCONFA_IFINDEX_ALL
,
877 net
->ipv6
.devconf_all
);
878 } else if ((!newf
) ^ (!old
))
879 dev_forward_change((struct inet6_dev
*)table
->extra1
);
883 rt6_purge_dflt_routers(net
);
887 static void addrconf_linkdown_change(struct net
*net
, __s32 newf
)
889 struct net_device
*dev
;
890 struct inet6_dev
*idev
;
892 for_each_netdev(net
, dev
) {
893 idev
= __in6_dev_get(dev
);
895 int changed
= (!idev
->cnf
.ignore_routes_with_linkdown
) ^ (!newf
);
897 idev
->cnf
.ignore_routes_with_linkdown
= newf
;
899 inet6_netconf_notify_devconf(dev_net(dev
),
901 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
,
908 static int addrconf_fixup_linkdown(struct ctl_table
*table
, int *p
, int newf
)
914 return restart_syscall();
916 net
= (struct net
*)table
->extra2
;
920 if (p
== &net
->ipv6
.devconf_dflt
->ignore_routes_with_linkdown
) {
921 if ((!newf
) ^ (!old
))
922 inet6_netconf_notify_devconf(net
,
924 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
,
925 NETCONFA_IFINDEX_DEFAULT
,
926 net
->ipv6
.devconf_dflt
);
931 if (p
== &net
->ipv6
.devconf_all
->ignore_routes_with_linkdown
) {
932 net
->ipv6
.devconf_dflt
->ignore_routes_with_linkdown
= newf
;
933 addrconf_linkdown_change(net
, newf
);
934 if ((!newf
) ^ (!old
))
935 inet6_netconf_notify_devconf(net
,
937 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
,
938 NETCONFA_IFINDEX_ALL
,
939 net
->ipv6
.devconf_all
);
948 /* Nobody refers to this ifaddr, destroy it */
949 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
951 WARN_ON(!hlist_unhashed(&ifp
->addr_lst
));
953 #ifdef NET_REFCNT_DEBUG
954 pr_debug("%s\n", __func__
);
957 in6_dev_put(ifp
->idev
);
959 if (cancel_delayed_work(&ifp
->dad_work
))
960 pr_notice("delayed DAD work was pending while freeing ifa=%p\n",
963 if (ifp
->state
!= INET6_IFADDR_STATE_DEAD
) {
964 pr_warn("Freeing alive inet6 address %p\n", ifp
);
972 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
975 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
978 * Each device address list is sorted in order of scope -
979 * global before linklocal.
981 list_for_each(p
, &idev
->addr_list
) {
982 struct inet6_ifaddr
*ifa
983 = list_entry(p
, struct inet6_ifaddr
, if_list
);
984 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
988 list_add_tail_rcu(&ifp
->if_list
, p
);
991 static u32
inet6_addr_hash(const struct net
*net
, const struct in6_addr
*addr
)
993 u32 val
= ipv6_addr_hash(addr
) ^ net_hash_mix(net
);
995 return hash_32(val
, IN6_ADDR_HSIZE_SHIFT
);
998 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
999 struct net_device
*dev
, unsigned int hash
)
1001 struct inet6_ifaddr
*ifp
;
1003 hlist_for_each_entry(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1004 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1006 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1007 if (!dev
|| ifp
->idev
->dev
== dev
)
1014 static int ipv6_add_addr_hash(struct net_device
*dev
, struct inet6_ifaddr
*ifa
)
1016 unsigned int hash
= inet6_addr_hash(dev_net(dev
), &ifa
->addr
);
1019 spin_lock(&addrconf_hash_lock
);
1021 /* Ignore adding duplicate addresses on an interface */
1022 if (ipv6_chk_same_addr(dev_net(dev
), &ifa
->addr
, dev
, hash
)) {
1023 netdev_dbg(dev
, "ipv6_add_addr: already assigned\n");
1026 hlist_add_head_rcu(&ifa
->addr_lst
, &inet6_addr_lst
[hash
]);
1029 spin_unlock(&addrconf_hash_lock
);
1034 /* On success it returns ifp with increased reference count */
1036 static struct inet6_ifaddr
*
1037 ipv6_add_addr(struct inet6_dev
*idev
, struct ifa6_config
*cfg
,
1038 bool can_block
, struct netlink_ext_ack
*extack
)
1040 gfp_t gfp_flags
= can_block
? GFP_KERNEL
: GFP_ATOMIC
;
1041 int addr_type
= ipv6_addr_type(cfg
->pfx
);
1042 struct net
*net
= dev_net(idev
->dev
);
1043 struct inet6_ifaddr
*ifa
= NULL
;
1044 struct fib6_info
*f6i
= NULL
;
1047 if (addr_type
== IPV6_ADDR_ANY
||
1048 (addr_type
& IPV6_ADDR_MULTICAST
&&
1049 !(cfg
->ifa_flags
& IFA_F_MCAUTOJOIN
)) ||
1050 (!(idev
->dev
->flags
& IFF_LOOPBACK
) &&
1051 !netif_is_l3_master(idev
->dev
) &&
1052 addr_type
& IPV6_ADDR_LOOPBACK
))
1053 return ERR_PTR(-EADDRNOTAVAIL
);
1056 err
= -ENODEV
; /*XXX*/
1060 if (idev
->cnf
.disable_ipv6
) {
1065 /* validator notifier needs to be blocking;
1066 * do not call in atomic context
1069 struct in6_validator_info i6vi
= {
1070 .i6vi_addr
= *cfg
->pfx
,
1075 err
= inet6addr_validator_notifier_call_chain(NETDEV_UP
, &i6vi
);
1076 err
= notifier_to_errno(err
);
1081 ifa
= kzalloc(sizeof(*ifa
), gfp_flags
);
1087 f6i
= addrconf_f6i_alloc(net
, idev
, cfg
->pfx
, false, gfp_flags
);
1094 if (net
->ipv6
.devconf_all
->disable_policy
||
1095 idev
->cnf
.disable_policy
)
1096 f6i
->dst_nopolicy
= true;
1098 neigh_parms_data_state_setall(idev
->nd_parms
);
1100 ifa
->addr
= *cfg
->pfx
;
1102 ifa
->peer_addr
= *cfg
->peer_pfx
;
1104 spin_lock_init(&ifa
->lock
);
1105 INIT_DELAYED_WORK(&ifa
->dad_work
, addrconf_dad_work
);
1106 INIT_HLIST_NODE(&ifa
->addr_lst
);
1107 ifa
->scope
= cfg
->scope
;
1108 ifa
->prefix_len
= cfg
->plen
;
1109 ifa
->rt_priority
= cfg
->rt_priority
;
1110 ifa
->flags
= cfg
->ifa_flags
;
1111 /* No need to add the TENTATIVE flag for addresses with NODAD */
1112 if (!(cfg
->ifa_flags
& IFA_F_NODAD
))
1113 ifa
->flags
|= IFA_F_TENTATIVE
;
1114 ifa
->valid_lft
= cfg
->valid_lft
;
1115 ifa
->prefered_lft
= cfg
->preferred_lft
;
1116 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
1117 ifa
->tokenized
= false;
1125 refcount_set(&ifa
->refcnt
, 1);
1129 err
= ipv6_add_addr_hash(idev
->dev
, ifa
);
1131 rcu_read_unlock_bh();
1135 write_lock(&idev
->lock
);
1137 /* Add to inet6_dev unicast addr list. */
1138 ipv6_link_dev_addr(idev
, ifa
);
1140 if (ifa
->flags
&IFA_F_TEMPORARY
) {
1141 list_add(&ifa
->tmp_list
, &idev
->tempaddr_list
);
1146 write_unlock(&idev
->lock
);
1148 rcu_read_unlock_bh();
1150 inet6addr_notifier_call_chain(NETDEV_UP
, ifa
);
1152 if (unlikely(err
< 0)) {
1153 fib6_info_release(f6i
);
1157 in6_dev_put(ifa
->idev
);
1166 enum cleanup_prefix_rt_t
{
1167 CLEANUP_PREFIX_RT_NOP
, /* no cleanup action for prefix route */
1168 CLEANUP_PREFIX_RT_DEL
, /* delete the prefix route */
1169 CLEANUP_PREFIX_RT_EXPIRE
, /* update the lifetime of the prefix route */
1173 * Check, whether the prefix for ifp would still need a prefix route
1174 * after deleting ifp. The function returns one of the CLEANUP_PREFIX_RT_*
1177 * 1) we don't purge prefix if address was not permanent.
1178 * prefix is managed by its own lifetime.
1179 * 2) we also don't purge, if the address was IFA_F_NOPREFIXROUTE.
1180 * 3) if there are no addresses, delete prefix.
1181 * 4) if there are still other permanent address(es),
1182 * corresponding prefix is still permanent.
1183 * 5) if there are still other addresses with IFA_F_NOPREFIXROUTE,
1184 * don't purge the prefix, assume user space is managing it.
1185 * 6) otherwise, update prefix lifetime to the
1186 * longest valid lifetime among the corresponding
1187 * addresses on the device.
1188 * Note: subsequent RA will update lifetime.
1190 static enum cleanup_prefix_rt_t
1191 check_cleanup_prefix_route(struct inet6_ifaddr
*ifp
, unsigned long *expires
)
1193 struct inet6_ifaddr
*ifa
;
1194 struct inet6_dev
*idev
= ifp
->idev
;
1195 unsigned long lifetime
;
1196 enum cleanup_prefix_rt_t action
= CLEANUP_PREFIX_RT_DEL
;
1200 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
1203 if (ifa
->prefix_len
!= ifp
->prefix_len
||
1204 !ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
1207 if (ifa
->flags
& (IFA_F_PERMANENT
| IFA_F_NOPREFIXROUTE
))
1208 return CLEANUP_PREFIX_RT_NOP
;
1210 action
= CLEANUP_PREFIX_RT_EXPIRE
;
1212 spin_lock(&ifa
->lock
);
1214 lifetime
= addrconf_timeout_fixup(ifa
->valid_lft
, HZ
);
1216 * Note: Because this address is
1217 * not permanent, lifetime <
1218 * LONG_MAX / HZ here.
1220 if (time_before(*expires
, ifa
->tstamp
+ lifetime
* HZ
))
1221 *expires
= ifa
->tstamp
+ lifetime
* HZ
;
1222 spin_unlock(&ifa
->lock
);
1229 cleanup_prefix_route(struct inet6_ifaddr
*ifp
, unsigned long expires
,
1230 bool del_rt
, bool del_peer
)
1232 struct fib6_info
*f6i
;
1234 f6i
= addrconf_get_prefix_route(del_peer
? &ifp
->peer_addr
: &ifp
->addr
,
1236 ifp
->idev
->dev
, 0, RTF_DEFAULT
, true);
1239 ip6_del_rt(dev_net(ifp
->idev
->dev
), f6i
);
1241 if (!(f6i
->fib6_flags
& RTF_EXPIRES
))
1242 fib6_set_expires(f6i
, expires
);
1243 fib6_info_release(f6i
);
1249 /* This function wants to get referenced ifp and releases it before return */
1251 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
1254 enum cleanup_prefix_rt_t action
= CLEANUP_PREFIX_RT_NOP
;
1255 unsigned long expires
;
1259 spin_lock_bh(&ifp
->lock
);
1261 ifp
->state
= INET6_IFADDR_STATE_DEAD
;
1262 spin_unlock_bh(&ifp
->lock
);
1264 if (state
== INET6_IFADDR_STATE_DEAD
)
1267 spin_lock_bh(&addrconf_hash_lock
);
1268 hlist_del_init_rcu(&ifp
->addr_lst
);
1269 spin_unlock_bh(&addrconf_hash_lock
);
1271 write_lock_bh(&ifp
->idev
->lock
);
1273 if (ifp
->flags
&IFA_F_TEMPORARY
) {
1274 list_del(&ifp
->tmp_list
);
1276 in6_ifa_put(ifp
->ifpub
);
1282 if (ifp
->flags
& IFA_F_PERMANENT
&& !(ifp
->flags
& IFA_F_NOPREFIXROUTE
))
1283 action
= check_cleanup_prefix_route(ifp
, &expires
);
1285 list_del_rcu(&ifp
->if_list
);
1288 write_unlock_bh(&ifp
->idev
->lock
);
1290 addrconf_del_dad_work(ifp
);
1292 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
1294 inet6addr_notifier_call_chain(NETDEV_DOWN
, ifp
);
1296 if (action
!= CLEANUP_PREFIX_RT_NOP
) {
1297 cleanup_prefix_route(ifp
, expires
,
1298 action
== CLEANUP_PREFIX_RT_DEL
, false);
1301 /* clean up prefsrc entries */
1302 rt6_remove_prefsrc(ifp
);
1307 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
,
1308 struct inet6_ifaddr
*ift
,
1311 struct inet6_dev
*idev
= ifp
->idev
;
1312 struct in6_addr addr
, *tmpaddr
;
1313 unsigned long tmp_tstamp
, age
;
1314 unsigned long regen_advance
;
1315 struct ifa6_config cfg
;
1317 unsigned long now
= jiffies
;
1318 long max_desync_factor
;
1319 s32 cnf_temp_preferred_lft
;
1321 write_lock_bh(&idev
->lock
);
1323 spin_lock_bh(&ift
->lock
);
1324 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
1325 spin_unlock_bh(&ift
->lock
);
1332 if (idev
->cnf
.use_tempaddr
<= 0) {
1333 write_unlock_bh(&idev
->lock
);
1334 pr_info("%s: use_tempaddr is disabled\n", __func__
);
1339 spin_lock_bh(&ifp
->lock
);
1340 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
1341 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
1342 spin_unlock_bh(&ifp
->lock
);
1343 write_unlock_bh(&idev
->lock
);
1344 pr_warn("%s: regeneration time exceeded - disabled temporary address support\n",
1351 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
1352 ipv6_try_regen_rndid(idev
, tmpaddr
);
1353 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
1354 age
= (now
- ifp
->tstamp
) / HZ
;
1356 regen_advance
= idev
->cnf
.regen_max_retry
*
1357 idev
->cnf
.dad_transmits
*
1358 NEIGH_VAR(idev
->nd_parms
, RETRANS_TIME
) / HZ
;
1360 /* recalculate max_desync_factor each time and update
1361 * idev->desync_factor if it's larger
1363 cnf_temp_preferred_lft
= READ_ONCE(idev
->cnf
.temp_prefered_lft
);
1364 max_desync_factor
= min_t(__u32
,
1365 idev
->cnf
.max_desync_factor
,
1366 cnf_temp_preferred_lft
- regen_advance
);
1368 if (unlikely(idev
->desync_factor
> max_desync_factor
)) {
1369 if (max_desync_factor
> 0) {
1370 get_random_bytes(&idev
->desync_factor
,
1371 sizeof(idev
->desync_factor
));
1372 idev
->desync_factor
%= max_desync_factor
;
1374 idev
->desync_factor
= 0;
1378 memset(&cfg
, 0, sizeof(cfg
));
1379 cfg
.valid_lft
= min_t(__u32
, ifp
->valid_lft
,
1380 idev
->cnf
.temp_valid_lft
+ age
);
1381 cfg
.preferred_lft
= cnf_temp_preferred_lft
+ age
- idev
->desync_factor
;
1382 cfg
.preferred_lft
= min_t(__u32
, ifp
->prefered_lft
, cfg
.preferred_lft
);
1384 cfg
.plen
= ifp
->prefix_len
;
1385 tmp_tstamp
= ifp
->tstamp
;
1386 spin_unlock_bh(&ifp
->lock
);
1388 write_unlock_bh(&idev
->lock
);
1390 /* A temporary address is created only if this calculated Preferred
1391 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
1392 * an implementation must not create a temporary address with a zero
1393 * Preferred Lifetime.
1394 * Use age calculation as in addrconf_verify to avoid unnecessary
1395 * temporary addresses being generated.
1397 age
= (now
- tmp_tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
1398 if (cfg
.preferred_lft
<= regen_advance
+ age
) {
1405 cfg
.ifa_flags
= IFA_F_TEMPORARY
;
1406 /* set in addrconf_prefix_rcv() */
1407 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
1408 cfg
.ifa_flags
|= IFA_F_OPTIMISTIC
;
1411 cfg
.scope
= ipv6_addr_scope(cfg
.pfx
);
1413 ift
= ipv6_add_addr(idev
, &cfg
, block
, NULL
);
1417 pr_info("%s: retry temporary address regeneration\n", __func__
);
1419 write_lock_bh(&idev
->lock
);
1423 spin_lock_bh(&ift
->lock
);
1426 ift
->tstamp
= tmp_tstamp
;
1427 spin_unlock_bh(&ift
->lock
);
1429 addrconf_dad_start(ift
);
1437 * Choose an appropriate source address (RFC3484)
1440 IPV6_SADDR_RULE_INIT
= 0,
1441 IPV6_SADDR_RULE_LOCAL
,
1442 IPV6_SADDR_RULE_SCOPE
,
1443 IPV6_SADDR_RULE_PREFERRED
,
1444 #ifdef CONFIG_IPV6_MIP6
1445 IPV6_SADDR_RULE_HOA
,
1447 IPV6_SADDR_RULE_OIF
,
1448 IPV6_SADDR_RULE_LABEL
,
1449 IPV6_SADDR_RULE_PRIVACY
,
1450 IPV6_SADDR_RULE_ORCHID
,
1451 IPV6_SADDR_RULE_PREFIX
,
1452 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1453 IPV6_SADDR_RULE_NOT_OPTIMISTIC
,
1458 struct ipv6_saddr_score
{
1461 struct inet6_ifaddr
*ifa
;
1462 DECLARE_BITMAP(scorebits
, IPV6_SADDR_RULE_MAX
);
1467 struct ipv6_saddr_dst
{
1468 const struct in6_addr
*addr
;
1475 static inline int ipv6_saddr_preferred(int type
)
1477 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|IPV6_ADDR_LOOPBACK
))
1482 static bool ipv6_use_optimistic_addr(struct net
*net
,
1483 struct inet6_dev
*idev
)
1485 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1488 if (!net
->ipv6
.devconf_all
->optimistic_dad
&& !idev
->cnf
.optimistic_dad
)
1490 if (!net
->ipv6
.devconf_all
->use_optimistic
&& !idev
->cnf
.use_optimistic
)
1499 static bool ipv6_allow_optimistic_dad(struct net
*net
,
1500 struct inet6_dev
*idev
)
1502 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1505 if (!net
->ipv6
.devconf_all
->optimistic_dad
&& !idev
->cnf
.optimistic_dad
)
1514 static int ipv6_get_saddr_eval(struct net
*net
,
1515 struct ipv6_saddr_score
*score
,
1516 struct ipv6_saddr_dst
*dst
,
1521 if (i
<= score
->rule
) {
1523 case IPV6_SADDR_RULE_SCOPE
:
1524 ret
= score
->scopedist
;
1526 case IPV6_SADDR_RULE_PREFIX
:
1527 ret
= score
->matchlen
;
1530 ret
= !!test_bit(i
, score
->scorebits
);
1536 case IPV6_SADDR_RULE_INIT
:
1537 /* Rule 0: remember if hiscore is not ready yet */
1540 case IPV6_SADDR_RULE_LOCAL
:
1541 /* Rule 1: Prefer same address */
1542 ret
= ipv6_addr_equal(&score
->ifa
->addr
, dst
->addr
);
1544 case IPV6_SADDR_RULE_SCOPE
:
1545 /* Rule 2: Prefer appropriate scope
1550 * ---+--+-+---> scope
1552 * | d is scope of the destination.
1554 * | \ <- smaller scope is better if
1555 * B-15 | \ if scope is enough for destination.
1556 * | ret = B - scope (-1 <= scope >= d <= 15).
1558 * |/ <- greater is better
1559 * -C / if scope is not enough for destination.
1560 * /| ret = scope - C (-1 <= d < scope <= 15).
1562 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1563 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1564 * Assume B = 0 and we get C > 29.
1566 ret
= __ipv6_addr_src_scope(score
->addr_type
);
1567 if (ret
>= dst
->scope
)
1570 ret
-= 128; /* 30 is enough */
1571 score
->scopedist
= ret
;
1573 case IPV6_SADDR_RULE_PREFERRED
:
1575 /* Rule 3: Avoid deprecated and optimistic addresses */
1576 u8 avoid
= IFA_F_DEPRECATED
;
1578 if (!ipv6_use_optimistic_addr(net
, score
->ifa
->idev
))
1579 avoid
|= IFA_F_OPTIMISTIC
;
1580 ret
= ipv6_saddr_preferred(score
->addr_type
) ||
1581 !(score
->ifa
->flags
& avoid
);
1584 #ifdef CONFIG_IPV6_MIP6
1585 case IPV6_SADDR_RULE_HOA
:
1587 /* Rule 4: Prefer home address */
1588 int prefhome
= !(dst
->prefs
& IPV6_PREFER_SRC_COA
);
1589 ret
= !(score
->ifa
->flags
& IFA_F_HOMEADDRESS
) ^ prefhome
;
1593 case IPV6_SADDR_RULE_OIF
:
1594 /* Rule 5: Prefer outgoing interface */
1595 ret
= (!dst
->ifindex
||
1596 dst
->ifindex
== score
->ifa
->idev
->dev
->ifindex
);
1598 case IPV6_SADDR_RULE_LABEL
:
1599 /* Rule 6: Prefer matching label */
1600 ret
= ipv6_addr_label(net
,
1601 &score
->ifa
->addr
, score
->addr_type
,
1602 score
->ifa
->idev
->dev
->ifindex
) == dst
->label
;
1604 case IPV6_SADDR_RULE_PRIVACY
:
1606 /* Rule 7: Prefer public address
1607 * Note: prefer temporary address if use_tempaddr >= 2
1609 int preftmp
= dst
->prefs
& (IPV6_PREFER_SRC_PUBLIC
|IPV6_PREFER_SRC_TMP
) ?
1610 !!(dst
->prefs
& IPV6_PREFER_SRC_TMP
) :
1611 score
->ifa
->idev
->cnf
.use_tempaddr
>= 2;
1612 ret
= (!(score
->ifa
->flags
& IFA_F_TEMPORARY
)) ^ preftmp
;
1615 case IPV6_SADDR_RULE_ORCHID
:
1616 /* Rule 8-: Prefer ORCHID vs ORCHID or
1617 * non-ORCHID vs non-ORCHID
1619 ret
= !(ipv6_addr_orchid(&score
->ifa
->addr
) ^
1620 ipv6_addr_orchid(dst
->addr
));
1622 case IPV6_SADDR_RULE_PREFIX
:
1623 /* Rule 8: Use longest matching prefix */
1624 ret
= ipv6_addr_diff(&score
->ifa
->addr
, dst
->addr
);
1625 if (ret
> score
->ifa
->prefix_len
)
1626 ret
= score
->ifa
->prefix_len
;
1627 score
->matchlen
= ret
;
1629 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1630 case IPV6_SADDR_RULE_NOT_OPTIMISTIC
:
1631 /* Optimistic addresses still have lower precedence than other
1632 * preferred addresses.
1634 ret
= !(score
->ifa
->flags
& IFA_F_OPTIMISTIC
);
1642 __set_bit(i
, score
->scorebits
);
1648 static int __ipv6_dev_get_saddr(struct net
*net
,
1649 struct ipv6_saddr_dst
*dst
,
1650 struct inet6_dev
*idev
,
1651 struct ipv6_saddr_score
*scores
,
1654 struct ipv6_saddr_score
*score
= &scores
[1 - hiscore_idx
], *hiscore
= &scores
[hiscore_idx
];
1656 list_for_each_entry_rcu(score
->ifa
, &idev
->addr_list
, if_list
) {
1660 * - Tentative Address (RFC2462 section 5.4)
1661 * - A tentative address is not considered
1662 * "assigned to an interface" in the traditional
1663 * sense, unless it is also flagged as optimistic.
1664 * - Candidate Source Address (section 4)
1665 * - In any case, anycast addresses, multicast
1666 * addresses, and the unspecified address MUST
1667 * NOT be included in a candidate set.
1669 if ((score
->ifa
->flags
& IFA_F_TENTATIVE
) &&
1670 (!(score
->ifa
->flags
& IFA_F_OPTIMISTIC
)))
1673 score
->addr_type
= __ipv6_addr_type(&score
->ifa
->addr
);
1675 if (unlikely(score
->addr_type
== IPV6_ADDR_ANY
||
1676 score
->addr_type
& IPV6_ADDR_MULTICAST
)) {
1677 net_dbg_ratelimited("ADDRCONF: unspecified / multicast address assigned as unicast address on %s",
1683 bitmap_zero(score
->scorebits
, IPV6_SADDR_RULE_MAX
);
1685 for (i
= 0; i
< IPV6_SADDR_RULE_MAX
; i
++) {
1686 int minihiscore
, miniscore
;
1688 minihiscore
= ipv6_get_saddr_eval(net
, hiscore
, dst
, i
);
1689 miniscore
= ipv6_get_saddr_eval(net
, score
, dst
, i
);
1691 if (minihiscore
> miniscore
) {
1692 if (i
== IPV6_SADDR_RULE_SCOPE
&&
1693 score
->scopedist
> 0) {
1696 * each remaining entry
1697 * has too small (not enough)
1698 * scope, because ifa entries
1699 * are sorted by their scope
1705 } else if (minihiscore
< miniscore
) {
1706 swap(hiscore
, score
);
1707 hiscore_idx
= 1 - hiscore_idx
;
1709 /* restore our iterator */
1710 score
->ifa
= hiscore
->ifa
;
1720 static int ipv6_get_saddr_master(struct net
*net
,
1721 const struct net_device
*dst_dev
,
1722 const struct net_device
*master
,
1723 struct ipv6_saddr_dst
*dst
,
1724 struct ipv6_saddr_score
*scores
,
1727 struct inet6_dev
*idev
;
1729 idev
= __in6_dev_get(dst_dev
);
1731 hiscore_idx
= __ipv6_dev_get_saddr(net
, dst
, idev
,
1732 scores
, hiscore_idx
);
1734 idev
= __in6_dev_get(master
);
1736 hiscore_idx
= __ipv6_dev_get_saddr(net
, dst
, idev
,
1737 scores
, hiscore_idx
);
1742 int ipv6_dev_get_saddr(struct net
*net
, const struct net_device
*dst_dev
,
1743 const struct in6_addr
*daddr
, unsigned int prefs
,
1744 struct in6_addr
*saddr
)
1746 struct ipv6_saddr_score scores
[2], *hiscore
;
1747 struct ipv6_saddr_dst dst
;
1748 struct inet6_dev
*idev
;
1749 struct net_device
*dev
;
1751 bool use_oif_addr
= false;
1752 int hiscore_idx
= 0;
1755 dst_type
= __ipv6_addr_type(daddr
);
1757 dst
.ifindex
= dst_dev
? dst_dev
->ifindex
: 0;
1758 dst
.scope
= __ipv6_addr_src_scope(dst_type
);
1759 dst
.label
= ipv6_addr_label(net
, daddr
, dst_type
, dst
.ifindex
);
1762 scores
[hiscore_idx
].rule
= -1;
1763 scores
[hiscore_idx
].ifa
= NULL
;
1767 /* Candidate Source Address (section 4)
1768 * - multicast and link-local destination address,
1769 * the set of candidate source address MUST only
1770 * include addresses assigned to interfaces
1771 * belonging to the same link as the outgoing
1773 * (- For site-local destination addresses, the
1774 * set of candidate source addresses MUST only
1775 * include addresses assigned to interfaces
1776 * belonging to the same site as the outgoing
1778 * - "It is RECOMMENDED that the candidate source addresses
1779 * be the set of unicast addresses assigned to the
1780 * interface that will be used to send to the destination
1781 * (the 'outgoing' interface)." (RFC 6724)
1784 idev
= __in6_dev_get(dst_dev
);
1785 if ((dst_type
& IPV6_ADDR_MULTICAST
) ||
1786 dst
.scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
||
1787 (idev
&& idev
->cnf
.use_oif_addrs_only
)) {
1788 use_oif_addr
= true;
1794 hiscore_idx
= __ipv6_dev_get_saddr(net
, &dst
, idev
, scores
, hiscore_idx
);
1796 const struct net_device
*master
;
1799 /* if dst_dev exists and is enslaved to an L3 device, then
1800 * prefer addresses from dst_dev and then the master over
1801 * any other enslaved devices in the L3 domain.
1803 master
= l3mdev_master_dev_rcu(dst_dev
);
1805 master_idx
= master
->ifindex
;
1807 hiscore_idx
= ipv6_get_saddr_master(net
, dst_dev
,
1809 scores
, hiscore_idx
);
1811 if (scores
[hiscore_idx
].ifa
)
1815 for_each_netdev_rcu(net
, dev
) {
1816 /* only consider addresses on devices in the
1819 if (l3mdev_master_ifindex_rcu(dev
) != master_idx
)
1821 idev
= __in6_dev_get(dev
);
1824 hiscore_idx
= __ipv6_dev_get_saddr(net
, &dst
, idev
, scores
, hiscore_idx
);
1829 hiscore
= &scores
[hiscore_idx
];
1831 ret
= -EADDRNOTAVAIL
;
1833 *saddr
= hiscore
->ifa
->addr
;
1838 EXPORT_SYMBOL(ipv6_dev_get_saddr
);
1840 int __ipv6_get_lladdr(struct inet6_dev
*idev
, struct in6_addr
*addr
,
1843 struct inet6_ifaddr
*ifp
;
1844 int err
= -EADDRNOTAVAIL
;
1846 list_for_each_entry_reverse(ifp
, &idev
->addr_list
, if_list
) {
1847 if (ifp
->scope
> IFA_LINK
)
1849 if (ifp
->scope
== IFA_LINK
&&
1850 !(ifp
->flags
& banned_flags
)) {
1859 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1862 struct inet6_dev
*idev
;
1863 int err
= -EADDRNOTAVAIL
;
1866 idev
= __in6_dev_get(dev
);
1868 read_lock_bh(&idev
->lock
);
1869 err
= __ipv6_get_lladdr(idev
, addr
, banned_flags
);
1870 read_unlock_bh(&idev
->lock
);
1876 static int ipv6_count_addresses(const struct inet6_dev
*idev
)
1878 const struct inet6_ifaddr
*ifp
;
1882 list_for_each_entry_rcu(ifp
, &idev
->addr_list
, if_list
)
1888 int ipv6_chk_addr(struct net
*net
, const struct in6_addr
*addr
,
1889 const struct net_device
*dev
, int strict
)
1891 return ipv6_chk_addr_and_flags(net
, addr
, dev
, !dev
,
1892 strict
, IFA_F_TENTATIVE
);
1894 EXPORT_SYMBOL(ipv6_chk_addr
);
1896 /* device argument is used to find the L3 domain of interest. If
1897 * skip_dev_check is set, then the ifp device is not checked against
1898 * the passed in dev argument. So the 2 cases for addresses checks are:
1899 * 1. does the address exist in the L3 domain that dev is part of
1900 * (skip_dev_check = true), or
1902 * 2. does the address exist on the specific device
1903 * (skip_dev_check = false)
1905 int ipv6_chk_addr_and_flags(struct net
*net
, const struct in6_addr
*addr
,
1906 const struct net_device
*dev
, bool skip_dev_check
,
1907 int strict
, u32 banned_flags
)
1909 unsigned int hash
= inet6_addr_hash(net
, addr
);
1910 const struct net_device
*l3mdev
;
1911 struct inet6_ifaddr
*ifp
;
1916 l3mdev
= l3mdev_master_dev_rcu(dev
);
1920 hlist_for_each_entry_rcu(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1921 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1924 if (l3mdev_master_dev_rcu(ifp
->idev
->dev
) != l3mdev
)
1927 /* Decouple optimistic from tentative for evaluation here.
1928 * Ban optimistic addresses explicitly, when required.
1930 ifp_flags
= (ifp
->flags
&IFA_F_OPTIMISTIC
)
1931 ? (ifp
->flags
&~IFA_F_TENTATIVE
)
1933 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1934 !(ifp_flags
&banned_flags
) &&
1935 (!dev
|| ifp
->idev
->dev
== dev
||
1936 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))) {
1945 EXPORT_SYMBOL(ipv6_chk_addr_and_flags
);
1948 /* Compares an address/prefix_len with addresses on device @dev.
1949 * If one is found it returns true.
1951 bool ipv6_chk_custom_prefix(const struct in6_addr
*addr
,
1952 const unsigned int prefix_len
, struct net_device
*dev
)
1954 const struct inet6_ifaddr
*ifa
;
1955 const struct inet6_dev
*idev
;
1959 idev
= __in6_dev_get(dev
);
1961 list_for_each_entry_rcu(ifa
, &idev
->addr_list
, if_list
) {
1962 ret
= ipv6_prefix_equal(addr
, &ifa
->addr
, prefix_len
);
1971 EXPORT_SYMBOL(ipv6_chk_custom_prefix
);
1973 int ipv6_chk_prefix(const struct in6_addr
*addr
, struct net_device
*dev
)
1975 const struct inet6_ifaddr
*ifa
;
1976 const struct inet6_dev
*idev
;
1981 idev
= __in6_dev_get(dev
);
1983 list_for_each_entry_rcu(ifa
, &idev
->addr_list
, if_list
) {
1984 onlink
= ipv6_prefix_equal(addr
, &ifa
->addr
,
1993 EXPORT_SYMBOL(ipv6_chk_prefix
);
1995 struct inet6_ifaddr
*ipv6_get_ifaddr(struct net
*net
, const struct in6_addr
*addr
,
1996 struct net_device
*dev
, int strict
)
1998 unsigned int hash
= inet6_addr_hash(net
, addr
);
1999 struct inet6_ifaddr
*ifp
, *result
= NULL
;
2002 hlist_for_each_entry_rcu(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
2003 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
2005 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
2006 if (!dev
|| ifp
->idev
->dev
== dev
||
2007 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
2019 /* Gets referenced address, destroys ifaddr */
2021 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
, int dad_failed
)
2024 ifp
->flags
|= IFA_F_DADFAILED
;
2026 if (ifp
->flags
&IFA_F_TEMPORARY
) {
2027 struct inet6_ifaddr
*ifpub
;
2028 spin_lock_bh(&ifp
->lock
);
2031 in6_ifa_hold(ifpub
);
2032 spin_unlock_bh(&ifp
->lock
);
2033 ipv6_create_tempaddr(ifpub
, ifp
, true);
2036 spin_unlock_bh(&ifp
->lock
);
2039 } else if (ifp
->flags
&IFA_F_PERMANENT
|| !dad_failed
) {
2040 spin_lock_bh(&ifp
->lock
);
2041 addrconf_del_dad_work(ifp
);
2042 ifp
->flags
|= IFA_F_TENTATIVE
;
2044 ifp
->flags
&= ~IFA_F_OPTIMISTIC
;
2045 spin_unlock_bh(&ifp
->lock
);
2047 ipv6_ifa_notify(0, ifp
);
2054 static int addrconf_dad_end(struct inet6_ifaddr
*ifp
)
2058 spin_lock_bh(&ifp
->lock
);
2059 if (ifp
->state
== INET6_IFADDR_STATE_DAD
) {
2060 ifp
->state
= INET6_IFADDR_STATE_POSTDAD
;
2063 spin_unlock_bh(&ifp
->lock
);
2068 void addrconf_dad_failure(struct sk_buff
*skb
, struct inet6_ifaddr
*ifp
)
2070 struct inet6_dev
*idev
= ifp
->idev
;
2071 struct net
*net
= dev_net(ifp
->idev
->dev
);
2073 if (addrconf_dad_end(ifp
)) {
2078 net_info_ratelimited("%s: IPv6 duplicate address %pI6c used by %pM detected!\n",
2079 ifp
->idev
->dev
->name
, &ifp
->addr
, eth_hdr(skb
)->h_source
);
2081 spin_lock_bh(&ifp
->lock
);
2083 if (ifp
->flags
& IFA_F_STABLE_PRIVACY
) {
2084 struct in6_addr new_addr
;
2085 struct inet6_ifaddr
*ifp2
;
2086 int retries
= ifp
->stable_privacy_retry
+ 1;
2087 struct ifa6_config cfg
= {
2089 .plen
= ifp
->prefix_len
,
2090 .ifa_flags
= ifp
->flags
,
2091 .valid_lft
= ifp
->valid_lft
,
2092 .preferred_lft
= ifp
->prefered_lft
,
2093 .scope
= ifp
->scope
,
2096 if (retries
> net
->ipv6
.sysctl
.idgen_retries
) {
2097 net_info_ratelimited("%s: privacy stable address generation failed because of DAD conflicts!\n",
2098 ifp
->idev
->dev
->name
);
2102 new_addr
= ifp
->addr
;
2103 if (ipv6_generate_stable_address(&new_addr
, retries
,
2107 spin_unlock_bh(&ifp
->lock
);
2109 if (idev
->cnf
.max_addresses
&&
2110 ipv6_count_addresses(idev
) >=
2111 idev
->cnf
.max_addresses
)
2114 net_info_ratelimited("%s: generating new stable privacy address because of DAD conflict\n",
2115 ifp
->idev
->dev
->name
);
2117 ifp2
= ipv6_add_addr(idev
, &cfg
, false, NULL
);
2121 spin_lock_bh(&ifp2
->lock
);
2122 ifp2
->stable_privacy_retry
= retries
;
2123 ifp2
->state
= INET6_IFADDR_STATE_PREDAD
;
2124 spin_unlock_bh(&ifp2
->lock
);
2126 addrconf_mod_dad_work(ifp2
, net
->ipv6
.sysctl
.idgen_delay
);
2129 spin_lock_bh(&ifp
->lock
);
2133 /* transition from _POSTDAD to _ERRDAD */
2134 ifp
->state
= INET6_IFADDR_STATE_ERRDAD
;
2135 spin_unlock_bh(&ifp
->lock
);
2137 addrconf_mod_dad_work(ifp
, 0);
2141 /* Join to solicited addr multicast group.
2142 * caller must hold RTNL */
2143 void addrconf_join_solict(struct net_device
*dev
, const struct in6_addr
*addr
)
2145 struct in6_addr maddr
;
2147 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
2150 addrconf_addr_solict_mult(addr
, &maddr
);
2151 ipv6_dev_mc_inc(dev
, &maddr
);
2154 /* caller must hold RTNL */
2155 void addrconf_leave_solict(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
2157 struct in6_addr maddr
;
2159 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
2162 addrconf_addr_solict_mult(addr
, &maddr
);
2163 __ipv6_dev_mc_dec(idev
, &maddr
);
2166 /* caller must hold RTNL */
2167 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
2169 struct in6_addr addr
;
2171 if (ifp
->prefix_len
>= 127) /* RFC 6164 */
2173 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
2174 if (ipv6_addr_any(&addr
))
2176 __ipv6_dev_ac_inc(ifp
->idev
, &addr
);
2179 /* caller must hold RTNL */
2180 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
2182 struct in6_addr addr
;
2184 if (ifp
->prefix_len
>= 127) /* RFC 6164 */
2186 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
2187 if (ipv6_addr_any(&addr
))
2189 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
2192 static int addrconf_ifid_6lowpan(u8
*eui
, struct net_device
*dev
)
2194 switch (dev
->addr_len
) {
2196 memcpy(eui
, dev
->dev_addr
, 3);
2199 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
2201 case EUI64_ADDR_LEN
:
2202 memcpy(eui
, dev
->dev_addr
, EUI64_ADDR_LEN
);
2212 static int addrconf_ifid_ieee1394(u8
*eui
, struct net_device
*dev
)
2214 union fwnet_hwaddr
*ha
;
2216 if (dev
->addr_len
!= FWNET_ALEN
)
2219 ha
= (union fwnet_hwaddr
*)dev
->dev_addr
;
2221 memcpy(eui
, &ha
->uc
.uniq_id
, sizeof(ha
->uc
.uniq_id
));
2226 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
2228 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
2229 if (dev
->addr_len
!= ARCNET_ALEN
)
2232 eui
[7] = *(u8
*)dev
->dev_addr
;
2236 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
2238 if (dev
->addr_len
!= INFINIBAND_ALEN
)
2240 memcpy(eui
, dev
->dev_addr
+ 12, 8);
2245 static int __ipv6_isatap_ifid(u8
*eui
, __be32 addr
)
2249 eui
[0] = (ipv4_is_zeronet(addr
) || ipv4_is_private_10(addr
) ||
2250 ipv4_is_loopback(addr
) || ipv4_is_linklocal_169(addr
) ||
2251 ipv4_is_private_172(addr
) || ipv4_is_test_192(addr
) ||
2252 ipv4_is_anycast_6to4(addr
) || ipv4_is_private_192(addr
) ||
2253 ipv4_is_test_198(addr
) || ipv4_is_multicast(addr
) ||
2254 ipv4_is_lbcast(addr
)) ? 0x00 : 0x02;
2258 memcpy(eui
+ 4, &addr
, 4);
2262 static int addrconf_ifid_sit(u8
*eui
, struct net_device
*dev
)
2264 if (dev
->priv_flags
& IFF_ISATAP
)
2265 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
2269 static int addrconf_ifid_gre(u8
*eui
, struct net_device
*dev
)
2271 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
2274 static int addrconf_ifid_ip6tnl(u8
*eui
, struct net_device
*dev
)
2276 memcpy(eui
, dev
->perm_addr
, 3);
2277 memcpy(eui
+ 5, dev
->perm_addr
+ 3, 3);
2284 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
2286 switch (dev
->type
) {
2289 return addrconf_ifid_eui48(eui
, dev
);
2291 return addrconf_ifid_arcnet(eui
, dev
);
2292 case ARPHRD_INFINIBAND
:
2293 return addrconf_ifid_infiniband(eui
, dev
);
2295 return addrconf_ifid_sit(eui
, dev
);
2298 return addrconf_ifid_gre(eui
, dev
);
2299 case ARPHRD_6LOWPAN
:
2300 return addrconf_ifid_6lowpan(eui
, dev
);
2301 case ARPHRD_IEEE1394
:
2302 return addrconf_ifid_ieee1394(eui
, dev
);
2303 case ARPHRD_TUNNEL6
:
2306 return addrconf_ifid_ip6tnl(eui
, dev
);
2311 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
2314 struct inet6_ifaddr
*ifp
;
2316 read_lock_bh(&idev
->lock
);
2317 list_for_each_entry_reverse(ifp
, &idev
->addr_list
, if_list
) {
2318 if (ifp
->scope
> IFA_LINK
)
2320 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2321 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
2326 read_unlock_bh(&idev
->lock
);
2330 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
2331 static void ipv6_regen_rndid(struct inet6_dev
*idev
)
2334 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
2335 idev
->rndid
[0] &= ~0x02;
2338 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
2339 * check if generated address is not inappropriate
2341 * - Reserved subnet anycast (RFC 2526)
2342 * 11111101 11....11 1xxxxxxx
2343 * - ISATAP (RFC4214) 6.1
2344 * 00-00-5E-FE-xx-xx-xx-xx
2346 * - XXX: already assigned to an address on the device
2348 if (idev
->rndid
[0] == 0xfd &&
2349 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
2350 (idev
->rndid
[7]&0x80))
2352 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
2353 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
2355 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
2360 static void ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
)
2362 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
2363 ipv6_regen_rndid(idev
);
2371 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, u32 metric
,
2372 struct net_device
*dev
, unsigned long expires
,
2373 u32 flags
, gfp_t gfp_flags
)
2375 struct fib6_config cfg
= {
2376 .fc_table
= l3mdev_fib_table(dev
) ? : RT6_TABLE_PREFIX
,
2377 .fc_metric
= metric
? : IP6_RT_PRIO_ADDRCONF
,
2378 .fc_ifindex
= dev
->ifindex
,
2379 .fc_expires
= expires
,
2381 .fc_flags
= RTF_UP
| flags
,
2382 .fc_nlinfo
.nl_net
= dev_net(dev
),
2383 .fc_protocol
= RTPROT_KERNEL
,
2384 .fc_type
= RTN_UNICAST
,
2389 /* Prevent useless cloning on PtP SIT.
2390 This thing is done here expecting that the whole
2391 class of non-broadcast devices need not cloning.
2393 #if IS_ENABLED(CONFIG_IPV6_SIT)
2394 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
2395 cfg
.fc_flags
|= RTF_NONEXTHOP
;
2398 ip6_route_add(&cfg
, gfp_flags
, NULL
);
2402 static struct fib6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
2404 const struct net_device
*dev
,
2405 u32 flags
, u32 noflags
,
2408 struct fib6_node
*fn
;
2409 struct fib6_info
*rt
= NULL
;
2410 struct fib6_table
*table
;
2411 u32 tb_id
= l3mdev_fib_table(dev
) ? : RT6_TABLE_PREFIX
;
2413 table
= fib6_get_table(dev_net(dev
), tb_id
);
2418 fn
= fib6_locate(&table
->tb6_root
, pfx
, plen
, NULL
, 0, true);
2422 for_each_fib6_node_rt_rcu(fn
) {
2423 /* prefix routes only use builtin fib6_nh */
2427 if (rt
->fib6_nh
->fib_nh_dev
->ifindex
!= dev
->ifindex
)
2429 if (no_gw
&& rt
->fib6_nh
->fib_nh_gw_family
)
2431 if ((rt
->fib6_flags
& flags
) != flags
)
2433 if ((rt
->fib6_flags
& noflags
) != 0)
2435 if (!fib6_info_hold_safe(rt
))
2445 /* Create "default" multicast route to the interface */
2447 static void addrconf_add_mroute(struct net_device
*dev
)
2449 struct fib6_config cfg
= {
2450 .fc_table
= l3mdev_fib_table(dev
) ? : RT6_TABLE_LOCAL
,
2451 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
2452 .fc_ifindex
= dev
->ifindex
,
2455 .fc_type
= RTN_UNICAST
,
2456 .fc_nlinfo
.nl_net
= dev_net(dev
),
2459 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
2461 ip6_route_add(&cfg
, GFP_KERNEL
, NULL
);
2464 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
2466 struct inet6_dev
*idev
;
2470 idev
= ipv6_find_idev(dev
);
2474 if (idev
->cnf
.disable_ipv6
)
2475 return ERR_PTR(-EACCES
);
2477 /* Add default multicast route */
2478 if (!(dev
->flags
& IFF_LOOPBACK
) && !netif_is_l3_master(dev
))
2479 addrconf_add_mroute(dev
);
2484 static void manage_tempaddrs(struct inet6_dev
*idev
,
2485 struct inet6_ifaddr
*ifp
,
2486 __u32 valid_lft
, __u32 prefered_lft
,
2487 bool create
, unsigned long now
)
2490 struct inet6_ifaddr
*ift
;
2492 read_lock_bh(&idev
->lock
);
2493 /* update all temporary addresses in the list */
2494 list_for_each_entry(ift
, &idev
->tempaddr_list
, tmp_list
) {
2495 int age
, max_valid
, max_prefered
;
2497 if (ifp
!= ift
->ifpub
)
2500 /* RFC 4941 section 3.3:
2501 * If a received option will extend the lifetime of a public
2502 * address, the lifetimes of temporary addresses should
2503 * be extended, subject to the overall constraint that no
2504 * temporary addresses should ever remain "valid" or "preferred"
2505 * for a time longer than (TEMP_VALID_LIFETIME) or
2506 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), respectively.
2508 age
= (now
- ift
->cstamp
) / HZ
;
2509 max_valid
= idev
->cnf
.temp_valid_lft
- age
;
2513 max_prefered
= idev
->cnf
.temp_prefered_lft
-
2514 idev
->desync_factor
- age
;
2515 if (max_prefered
< 0)
2518 if (valid_lft
> max_valid
)
2519 valid_lft
= max_valid
;
2521 if (prefered_lft
> max_prefered
)
2522 prefered_lft
= max_prefered
;
2524 spin_lock(&ift
->lock
);
2526 ift
->valid_lft
= valid_lft
;
2527 ift
->prefered_lft
= prefered_lft
;
2529 if (prefered_lft
> 0)
2530 ift
->flags
&= ~IFA_F_DEPRECATED
;
2532 spin_unlock(&ift
->lock
);
2533 if (!(flags
&IFA_F_TENTATIVE
))
2534 ipv6_ifa_notify(0, ift
);
2537 if ((create
|| list_empty(&idev
->tempaddr_list
)) &&
2538 idev
->cnf
.use_tempaddr
> 0) {
2539 /* When a new public address is created as described
2540 * in [ADDRCONF], also create a new temporary address.
2541 * Also create a temporary address if it's enabled but
2542 * no temporary address currently exists.
2544 read_unlock_bh(&idev
->lock
);
2545 ipv6_create_tempaddr(ifp
, NULL
, false);
2547 read_unlock_bh(&idev
->lock
);
2551 static bool is_addr_mode_generate_stable(struct inet6_dev
*idev
)
2553 return idev
->cnf
.addr_gen_mode
== IN6_ADDR_GEN_MODE_STABLE_PRIVACY
||
2554 idev
->cnf
.addr_gen_mode
== IN6_ADDR_GEN_MODE_RANDOM
;
2557 int addrconf_prefix_rcv_add_addr(struct net
*net
, struct net_device
*dev
,
2558 const struct prefix_info
*pinfo
,
2559 struct inet6_dev
*in6_dev
,
2560 const struct in6_addr
*addr
, int addr_type
,
2561 u32 addr_flags
, bool sllao
, bool tokenized
,
2562 __u32 valid_lft
, u32 prefered_lft
)
2564 struct inet6_ifaddr
*ifp
= ipv6_get_ifaddr(net
, addr
, dev
, 1);
2565 int create
= 0, update_lft
= 0;
2567 if (!ifp
&& valid_lft
) {
2568 int max_addresses
= in6_dev
->cnf
.max_addresses
;
2569 struct ifa6_config cfg
= {
2571 .plen
= pinfo
->prefix_len
,
2572 .ifa_flags
= addr_flags
,
2573 .valid_lft
= valid_lft
,
2574 .preferred_lft
= prefered_lft
,
2575 .scope
= addr_type
& IPV6_ADDR_SCOPE_MASK
,
2578 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2579 if ((net
->ipv6
.devconf_all
->optimistic_dad
||
2580 in6_dev
->cnf
.optimistic_dad
) &&
2581 !net
->ipv6
.devconf_all
->forwarding
&& sllao
)
2582 cfg
.ifa_flags
|= IFA_F_OPTIMISTIC
;
2585 /* Do not allow to create too much of autoconfigured
2586 * addresses; this would be too easy way to crash kernel.
2588 if (!max_addresses
||
2589 ipv6_count_addresses(in6_dev
) < max_addresses
)
2590 ifp
= ipv6_add_addr(in6_dev
, &cfg
, false, NULL
);
2592 if (IS_ERR_OR_NULL(ifp
))
2596 spin_lock_bh(&ifp
->lock
);
2597 ifp
->flags
|= IFA_F_MANAGETEMPADDR
;
2598 ifp
->cstamp
= jiffies
;
2599 ifp
->tokenized
= tokenized
;
2600 spin_unlock_bh(&ifp
->lock
);
2601 addrconf_dad_start(ifp
);
2609 /* update lifetime (RFC2462 5.5.3 e) */
2610 spin_lock_bh(&ifp
->lock
);
2612 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
2613 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
2616 if (!create
&& stored_lft
) {
2617 const u32 minimum_lft
= min_t(u32
,
2618 stored_lft
, MIN_VALID_LIFETIME
);
2619 valid_lft
= max(valid_lft
, minimum_lft
);
2621 /* RFC4862 Section 5.5.3e:
2622 * "Note that the preferred lifetime of the
2623 * corresponding address is always reset to
2624 * the Preferred Lifetime in the received
2625 * Prefix Information option, regardless of
2626 * whether the valid lifetime is also reset or
2629 * So we should always update prefered_lft here.
2635 ifp
->valid_lft
= valid_lft
;
2636 ifp
->prefered_lft
= prefered_lft
;
2639 ifp
->flags
&= ~IFA_F_DEPRECATED
;
2640 spin_unlock_bh(&ifp
->lock
);
2642 if (!(flags
&IFA_F_TENTATIVE
))
2643 ipv6_ifa_notify(0, ifp
);
2645 spin_unlock_bh(&ifp
->lock
);
2647 manage_tempaddrs(in6_dev
, ifp
, valid_lft
, prefered_lft
,
2656 EXPORT_SYMBOL_GPL(addrconf_prefix_rcv_add_addr
);
2658 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
, bool sllao
)
2660 struct prefix_info
*pinfo
;
2665 struct inet6_dev
*in6_dev
;
2666 struct net
*net
= dev_net(dev
);
2668 pinfo
= (struct prefix_info
*) opt
;
2670 if (len
< sizeof(struct prefix_info
)) {
2671 netdev_dbg(dev
, "addrconf: prefix option too short\n");
2676 * Validation checks ([ADDRCONF], page 19)
2679 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
2681 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
2684 valid_lft
= ntohl(pinfo
->valid
);
2685 prefered_lft
= ntohl(pinfo
->prefered
);
2687 if (prefered_lft
> valid_lft
) {
2688 net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n");
2692 in6_dev
= in6_dev_get(dev
);
2695 net_dbg_ratelimited("addrconf: device %s not configured\n",
2701 * Two things going on here:
2702 * 1) Add routes for on-link prefixes
2703 * 2) Configure prefixes with the auto flag set
2706 if (pinfo
->onlink
) {
2707 struct fib6_info
*rt
;
2708 unsigned long rt_expires
;
2710 /* Avoid arithmetic overflow. Really, we could
2711 * save rt_expires in seconds, likely valid_lft,
2712 * but it would require division in fib gc, that it
2716 rt_expires
= addrconf_timeout_fixup(valid_lft
, HZ
);
2718 rt_expires
= addrconf_timeout_fixup(valid_lft
, USER_HZ
);
2720 if (addrconf_finite_timeout(rt_expires
))
2723 rt
= addrconf_get_prefix_route(&pinfo
->prefix
,
2726 RTF_ADDRCONF
| RTF_PREFIX_RT
,
2730 /* Autoconf prefix route */
2731 if (valid_lft
== 0) {
2732 ip6_del_rt(net
, rt
);
2734 } else if (addrconf_finite_timeout(rt_expires
)) {
2736 fib6_set_expires(rt
, jiffies
+ rt_expires
);
2738 fib6_clean_expires(rt
);
2740 } else if (valid_lft
) {
2741 clock_t expires
= 0;
2742 int flags
= RTF_ADDRCONF
| RTF_PREFIX_RT
;
2743 if (addrconf_finite_timeout(rt_expires
)) {
2745 flags
|= RTF_EXPIRES
;
2746 expires
= jiffies_to_clock_t(rt_expires
);
2748 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
2749 0, dev
, expires
, flags
,
2752 fib6_info_release(rt
);
2755 /* Try to figure out our local address for this prefix */
2757 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
2758 struct in6_addr addr
;
2759 bool tokenized
= false, dev_addr_generated
= false;
2761 if (pinfo
->prefix_len
== 64) {
2762 memcpy(&addr
, &pinfo
->prefix
, 8);
2764 if (!ipv6_addr_any(&in6_dev
->token
)) {
2765 read_lock_bh(&in6_dev
->lock
);
2766 memcpy(addr
.s6_addr
+ 8,
2767 in6_dev
->token
.s6_addr
+ 8, 8);
2768 read_unlock_bh(&in6_dev
->lock
);
2770 } else if (is_addr_mode_generate_stable(in6_dev
) &&
2771 !ipv6_generate_stable_address(&addr
, 0,
2773 addr_flags
|= IFA_F_STABLE_PRIVACY
;
2775 } else if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
2776 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
2779 dev_addr_generated
= true;
2783 net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n",
2788 err
= addrconf_prefix_rcv_add_addr(net
, dev
, pinfo
, in6_dev
,
2791 tokenized
, valid_lft
,
2796 /* Ignore error case here because previous prefix add addr was
2797 * successful which will be notified.
2799 ndisc_ops_prefix_rcv_add_addr(net
, dev
, pinfo
, in6_dev
, &addr
,
2800 addr_type
, addr_flags
, sllao
,
2801 tokenized
, valid_lft
,
2803 dev_addr_generated
);
2805 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
2807 in6_dev_put(in6_dev
);
2811 * Set destination address.
2812 * Special case for SIT interfaces where we create a new "virtual"
2815 int addrconf_set_dstaddr(struct net
*net
, void __user
*arg
)
2817 struct in6_ifreq ireq
;
2818 struct net_device
*dev
;
2824 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2827 dev
= __dev_get_by_index(net
, ireq
.ifr6_ifindex
);
2833 #if IS_ENABLED(CONFIG_IPV6_SIT)
2834 if (dev
->type
== ARPHRD_SIT
) {
2835 const struct net_device_ops
*ops
= dev
->netdev_ops
;
2837 struct ip_tunnel_parm p
;
2839 err
= -EADDRNOTAVAIL
;
2840 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
2843 memset(&p
, 0, sizeof(p
));
2844 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
2848 p
.iph
.protocol
= IPPROTO_IPV6
;
2850 ifr
.ifr_ifru
.ifru_data
= (__force
void __user
*)&p
;
2852 if (ops
->ndo_do_ioctl
) {
2853 mm_segment_t oldfs
= get_fs();
2856 err
= ops
->ndo_do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
2863 dev
= __dev_get_by_name(net
, p
.name
);
2866 err
= dev_open(dev
, NULL
);
2876 static int ipv6_mc_config(struct sock
*sk
, bool join
,
2877 const struct in6_addr
*addr
, int ifindex
)
2885 ret
= ipv6_sock_mc_join(sk
, ifindex
, addr
);
2887 ret
= ipv6_sock_mc_drop(sk
, ifindex
, addr
);
2894 * Manual configuration of address on an interface
2896 static int inet6_addr_add(struct net
*net
, int ifindex
,
2897 struct ifa6_config
*cfg
,
2898 struct netlink_ext_ack
*extack
)
2900 struct inet6_ifaddr
*ifp
;
2901 struct inet6_dev
*idev
;
2902 struct net_device
*dev
;
2903 unsigned long timeout
;
2909 if (cfg
->plen
> 128)
2912 /* check the lifetime */
2913 if (!cfg
->valid_lft
|| cfg
->preferred_lft
> cfg
->valid_lft
)
2916 if (cfg
->ifa_flags
& IFA_F_MANAGETEMPADDR
&& cfg
->plen
!= 64)
2919 dev
= __dev_get_by_index(net
, ifindex
);
2923 idev
= addrconf_add_dev(dev
);
2925 return PTR_ERR(idev
);
2927 if (cfg
->ifa_flags
& IFA_F_MCAUTOJOIN
) {
2928 int ret
= ipv6_mc_config(net
->ipv6
.mc_autojoin_sk
,
2929 true, cfg
->pfx
, ifindex
);
2935 cfg
->scope
= ipv6_addr_scope(cfg
->pfx
);
2937 timeout
= addrconf_timeout_fixup(cfg
->valid_lft
, HZ
);
2938 if (addrconf_finite_timeout(timeout
)) {
2939 expires
= jiffies_to_clock_t(timeout
* HZ
);
2940 cfg
->valid_lft
= timeout
;
2941 flags
= RTF_EXPIRES
;
2945 cfg
->ifa_flags
|= IFA_F_PERMANENT
;
2948 timeout
= addrconf_timeout_fixup(cfg
->preferred_lft
, HZ
);
2949 if (addrconf_finite_timeout(timeout
)) {
2951 cfg
->ifa_flags
|= IFA_F_DEPRECATED
;
2952 cfg
->preferred_lft
= timeout
;
2955 ifp
= ipv6_add_addr(idev
, cfg
, true, extack
);
2957 if (!(cfg
->ifa_flags
& IFA_F_NOPREFIXROUTE
)) {
2958 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
,
2959 ifp
->rt_priority
, dev
, expires
,
2963 /* Send a netlink notification if DAD is enabled and
2964 * optimistic flag is not set
2966 if (!(ifp
->flags
& (IFA_F_OPTIMISTIC
| IFA_F_NODAD
)))
2967 ipv6_ifa_notify(0, ifp
);
2969 * Note that section 3.1 of RFC 4429 indicates
2970 * that the Optimistic flag should not be set for
2971 * manually configured addresses
2973 addrconf_dad_start(ifp
);
2974 if (cfg
->ifa_flags
& IFA_F_MANAGETEMPADDR
)
2975 manage_tempaddrs(idev
, ifp
, cfg
->valid_lft
,
2976 cfg
->preferred_lft
, true, jiffies
);
2978 addrconf_verify_rtnl();
2980 } else if (cfg
->ifa_flags
& IFA_F_MCAUTOJOIN
) {
2981 ipv6_mc_config(net
->ipv6
.mc_autojoin_sk
, false,
2985 return PTR_ERR(ifp
);
2988 static int inet6_addr_del(struct net
*net
, int ifindex
, u32 ifa_flags
,
2989 const struct in6_addr
*pfx
, unsigned int plen
)
2991 struct inet6_ifaddr
*ifp
;
2992 struct inet6_dev
*idev
;
2993 struct net_device
*dev
;
2998 dev
= __dev_get_by_index(net
, ifindex
);
3002 idev
= __in6_dev_get(dev
);
3006 read_lock_bh(&idev
->lock
);
3007 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
3008 if (ifp
->prefix_len
== plen
&&
3009 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
3011 read_unlock_bh(&idev
->lock
);
3013 if (!(ifp
->flags
& IFA_F_TEMPORARY
) &&
3014 (ifa_flags
& IFA_F_MANAGETEMPADDR
))
3015 manage_tempaddrs(idev
, ifp
, 0, 0, false,
3018 addrconf_verify_rtnl();
3019 if (ipv6_addr_is_multicast(pfx
)) {
3020 ipv6_mc_config(net
->ipv6
.mc_autojoin_sk
,
3021 false, pfx
, dev
->ifindex
);
3026 read_unlock_bh(&idev
->lock
);
3027 return -EADDRNOTAVAIL
;
3031 int addrconf_add_ifaddr(struct net
*net
, void __user
*arg
)
3033 struct ifa6_config cfg
= {
3034 .ifa_flags
= IFA_F_PERMANENT
,
3035 .preferred_lft
= INFINITY_LIFE_TIME
,
3036 .valid_lft
= INFINITY_LIFE_TIME
,
3038 struct in6_ifreq ireq
;
3041 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
3044 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
3047 cfg
.pfx
= &ireq
.ifr6_addr
;
3048 cfg
.plen
= ireq
.ifr6_prefixlen
;
3051 err
= inet6_addr_add(net
, ireq
.ifr6_ifindex
, &cfg
, NULL
);
3056 int addrconf_del_ifaddr(struct net
*net
, void __user
*arg
)
3058 struct in6_ifreq ireq
;
3061 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
3064 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
3068 err
= inet6_addr_del(net
, ireq
.ifr6_ifindex
, 0, &ireq
.ifr6_addr
,
3069 ireq
.ifr6_prefixlen
);
3074 static void add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
3075 int plen
, int scope
)
3077 struct inet6_ifaddr
*ifp
;
3078 struct ifa6_config cfg
= {
3081 .ifa_flags
= IFA_F_PERMANENT
,
3082 .valid_lft
= INFINITY_LIFE_TIME
,
3083 .preferred_lft
= INFINITY_LIFE_TIME
,
3087 ifp
= ipv6_add_addr(idev
, &cfg
, true, NULL
);
3089 spin_lock_bh(&ifp
->lock
);
3090 ifp
->flags
&= ~IFA_F_TENTATIVE
;
3091 spin_unlock_bh(&ifp
->lock
);
3092 rt_genid_bump_ipv6(dev_net(idev
->dev
));
3093 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
3098 #if IS_ENABLED(CONFIG_IPV6_SIT)
3099 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
3101 struct in6_addr addr
;
3102 struct net_device
*dev
;
3103 struct net
*net
= dev_net(idev
->dev
);
3109 memset(&addr
, 0, sizeof(struct in6_addr
));
3110 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
3112 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
3113 addr
.s6_addr32
[0] = htonl(0xfe800000);
3117 scope
= IPV6_ADDR_COMPATv4
;
3119 pflags
|= RTF_NONEXTHOP
;
3122 if (addr
.s6_addr32
[3]) {
3123 add_addr(idev
, &addr
, plen
, scope
);
3124 addrconf_prefix_route(&addr
, plen
, 0, idev
->dev
, 0, pflags
,
3129 for_each_netdev(net
, dev
) {
3130 struct in_device
*in_dev
= __in_dev_get_rtnl(dev
);
3131 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
3132 struct in_ifaddr
*ifa
;
3135 in_dev_for_each_ifa_rtnl(ifa
, in_dev
) {
3136 addr
.s6_addr32
[3] = ifa
->ifa_local
;
3138 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
3140 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
3141 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
3146 add_addr(idev
, &addr
, plen
, flag
);
3147 addrconf_prefix_route(&addr
, plen
, 0, idev
->dev
,
3148 0, pflags
, GFP_KERNEL
);
3155 static void init_loopback(struct net_device
*dev
)
3157 struct inet6_dev
*idev
;
3163 idev
= ipv6_find_idev(dev
);
3165 pr_debug("%s: add_dev failed\n", __func__
);
3169 add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
);
3172 void addrconf_add_linklocal(struct inet6_dev
*idev
,
3173 const struct in6_addr
*addr
, u32 flags
)
3175 struct ifa6_config cfg
= {
3178 .ifa_flags
= flags
| IFA_F_PERMANENT
,
3179 .valid_lft
= INFINITY_LIFE_TIME
,
3180 .preferred_lft
= INFINITY_LIFE_TIME
,
3183 struct inet6_ifaddr
*ifp
;
3185 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3186 if ((dev_net(idev
->dev
)->ipv6
.devconf_all
->optimistic_dad
||
3187 idev
->cnf
.optimistic_dad
) &&
3188 !dev_net(idev
->dev
)->ipv6
.devconf_all
->forwarding
)
3189 cfg
.ifa_flags
|= IFA_F_OPTIMISTIC
;
3192 ifp
= ipv6_add_addr(idev
, &cfg
, true, NULL
);
3194 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, 0, idev
->dev
,
3196 addrconf_dad_start(ifp
);
3200 EXPORT_SYMBOL_GPL(addrconf_add_linklocal
);
3202 static bool ipv6_reserved_interfaceid(struct in6_addr address
)
3204 if ((address
.s6_addr32
[2] | address
.s6_addr32
[3]) == 0)
3207 if (address
.s6_addr32
[2] == htonl(0x02005eff) &&
3208 ((address
.s6_addr32
[3] & htonl(0xfe000000)) == htonl(0xfe000000)))
3211 if (address
.s6_addr32
[2] == htonl(0xfdffffff) &&
3212 ((address
.s6_addr32
[3] & htonl(0xffffff80)) == htonl(0xffffff80)))
3218 static int ipv6_generate_stable_address(struct in6_addr
*address
,
3220 const struct inet6_dev
*idev
)
3222 static DEFINE_SPINLOCK(lock
);
3223 static __u32 digest
[SHA_DIGEST_WORDS
];
3224 static __u32 workspace
[SHA_WORKSPACE_WORDS
];
3227 char __data
[SHA_MESSAGE_BYTES
];
3229 struct in6_addr secret
;
3231 unsigned char hwaddr
[MAX_ADDR_LEN
];
3236 struct in6_addr secret
;
3237 struct in6_addr temp
;
3238 struct net
*net
= dev_net(idev
->dev
);
3240 BUILD_BUG_ON(sizeof(data
.__data
) != sizeof(data
));
3242 if (idev
->cnf
.stable_secret
.initialized
)
3243 secret
= idev
->cnf
.stable_secret
.secret
;
3244 else if (net
->ipv6
.devconf_dflt
->stable_secret
.initialized
)
3245 secret
= net
->ipv6
.devconf_dflt
->stable_secret
.secret
;
3250 spin_lock_bh(&lock
);
3253 memset(&data
, 0, sizeof(data
));
3254 memset(workspace
, 0, sizeof(workspace
));
3255 memcpy(data
.hwaddr
, idev
->dev
->perm_addr
, idev
->dev
->addr_len
);
3256 data
.prefix
[0] = address
->s6_addr32
[0];
3257 data
.prefix
[1] = address
->s6_addr32
[1];
3258 data
.secret
= secret
;
3259 data
.dad_count
= dad_count
;
3261 sha_transform(digest
, data
.__data
, workspace
);
3264 temp
.s6_addr32
[2] = (__force __be32
)digest
[0];
3265 temp
.s6_addr32
[3] = (__force __be32
)digest
[1];
3267 spin_unlock_bh(&lock
);
3269 if (ipv6_reserved_interfaceid(temp
)) {
3271 if (dad_count
> dev_net(idev
->dev
)->ipv6
.sysctl
.idgen_retries
)
3280 static void ipv6_gen_mode_random_init(struct inet6_dev
*idev
)
3282 struct ipv6_stable_secret
*s
= &idev
->cnf
.stable_secret
;
3286 s
= &idev
->cnf
.stable_secret
;
3287 get_random_bytes(&s
->secret
, sizeof(s
->secret
));
3288 s
->initialized
= true;
3291 static void addrconf_addr_gen(struct inet6_dev
*idev
, bool prefix_route
)
3293 struct in6_addr addr
;
3295 /* no link local addresses on L3 master devices */
3296 if (netif_is_l3_master(idev
->dev
))
3299 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
3301 switch (idev
->cnf
.addr_gen_mode
) {
3302 case IN6_ADDR_GEN_MODE_RANDOM
:
3303 ipv6_gen_mode_random_init(idev
);
3305 case IN6_ADDR_GEN_MODE_STABLE_PRIVACY
:
3306 if (!ipv6_generate_stable_address(&addr
, 0, idev
))
3307 addrconf_add_linklocal(idev
, &addr
,
3308 IFA_F_STABLE_PRIVACY
);
3309 else if (prefix_route
)
3310 addrconf_prefix_route(&addr
, 64, 0, idev
->dev
,
3313 case IN6_ADDR_GEN_MODE_EUI64
:
3314 /* addrconf_add_linklocal also adds a prefix_route and we
3315 * only need to care about prefix routes if ipv6_generate_eui64
3316 * couldn't generate one.
3318 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) == 0)
3319 addrconf_add_linklocal(idev
, &addr
, 0);
3320 else if (prefix_route
)
3321 addrconf_prefix_route(&addr
, 64, 0, idev
->dev
,
3324 case IN6_ADDR_GEN_MODE_NONE
:
3326 /* will not add any link local address */
3331 static void addrconf_dev_config(struct net_device
*dev
)
3333 struct inet6_dev
*idev
;
3337 if ((dev
->type
!= ARPHRD_ETHER
) &&
3338 (dev
->type
!= ARPHRD_FDDI
) &&
3339 (dev
->type
!= ARPHRD_ARCNET
) &&
3340 (dev
->type
!= ARPHRD_INFINIBAND
) &&
3341 (dev
->type
!= ARPHRD_IEEE1394
) &&
3342 (dev
->type
!= ARPHRD_TUNNEL6
) &&
3343 (dev
->type
!= ARPHRD_6LOWPAN
) &&
3344 (dev
->type
!= ARPHRD_IP6GRE
) &&
3345 (dev
->type
!= ARPHRD_IPGRE
) &&
3346 (dev
->type
!= ARPHRD_TUNNEL
) &&
3347 (dev
->type
!= ARPHRD_NONE
) &&
3348 (dev
->type
!= ARPHRD_RAWIP
)) {
3349 /* Alas, we support only Ethernet autoconfiguration. */
3350 idev
= __in6_dev_get(dev
);
3351 if (!IS_ERR_OR_NULL(idev
) && dev
->flags
& IFF_UP
&&
3352 dev
->flags
& IFF_MULTICAST
)
3357 idev
= addrconf_add_dev(dev
);
3361 /* this device type has no EUI support */
3362 if (dev
->type
== ARPHRD_NONE
&&
3363 idev
->cnf
.addr_gen_mode
== IN6_ADDR_GEN_MODE_EUI64
)
3364 idev
->cnf
.addr_gen_mode
= IN6_ADDR_GEN_MODE_RANDOM
;
3366 addrconf_addr_gen(idev
, false);
3369 #if IS_ENABLED(CONFIG_IPV6_SIT)
3370 static void addrconf_sit_config(struct net_device
*dev
)
3372 struct inet6_dev
*idev
;
3377 * Configure the tunnel with one of our IPv4
3378 * addresses... we should configure all of
3379 * our v4 addrs in the tunnel
3382 idev
= ipv6_find_idev(dev
);
3384 pr_debug("%s: add_dev failed\n", __func__
);
3388 if (dev
->priv_flags
& IFF_ISATAP
) {
3389 addrconf_addr_gen(idev
, false);
3393 sit_add_v4_addrs(idev
);
3395 if (dev
->flags
&IFF_POINTOPOINT
)
3396 addrconf_add_mroute(dev
);
3400 #if IS_ENABLED(CONFIG_NET_IPGRE)
3401 static void addrconf_gre_config(struct net_device
*dev
)
3403 struct inet6_dev
*idev
;
3407 idev
= ipv6_find_idev(dev
);
3409 pr_debug("%s: add_dev failed\n", __func__
);
3413 addrconf_addr_gen(idev
, true);
3414 if (dev
->flags
& IFF_POINTOPOINT
)
3415 addrconf_add_mroute(dev
);
3419 static int fixup_permanent_addr(struct net
*net
,
3420 struct inet6_dev
*idev
,
3421 struct inet6_ifaddr
*ifp
)
3423 /* !fib6_node means the host route was removed from the
3424 * FIB, for example, if 'lo' device is taken down. In that
3425 * case regenerate the host route.
3427 if (!ifp
->rt
|| !ifp
->rt
->fib6_node
) {
3428 struct fib6_info
*f6i
, *prev
;
3430 f6i
= addrconf_f6i_alloc(net
, idev
, &ifp
->addr
, false,
3433 return PTR_ERR(f6i
);
3435 /* ifp->rt can be accessed outside of rtnl */
3436 spin_lock(&ifp
->lock
);
3439 spin_unlock(&ifp
->lock
);
3441 fib6_info_release(prev
);
3444 if (!(ifp
->flags
& IFA_F_NOPREFIXROUTE
)) {
3445 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
,
3446 ifp
->rt_priority
, idev
->dev
, 0, 0,
3450 if (ifp
->state
== INET6_IFADDR_STATE_PREDAD
)
3451 addrconf_dad_start(ifp
);
3456 static void addrconf_permanent_addr(struct net
*net
, struct net_device
*dev
)
3458 struct inet6_ifaddr
*ifp
, *tmp
;
3459 struct inet6_dev
*idev
;
3461 idev
= __in6_dev_get(dev
);
3465 write_lock_bh(&idev
->lock
);
3467 list_for_each_entry_safe(ifp
, tmp
, &idev
->addr_list
, if_list
) {
3468 if ((ifp
->flags
& IFA_F_PERMANENT
) &&
3469 fixup_permanent_addr(net
, idev
, ifp
) < 0) {
3470 write_unlock_bh(&idev
->lock
);
3473 write_lock_bh(&idev
->lock
);
3475 net_info_ratelimited("%s: Failed to add prefix route for address %pI6c; dropping\n",
3476 idev
->dev
->name
, &ifp
->addr
);
3480 write_unlock_bh(&idev
->lock
);
3483 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
3486 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
3487 struct netdev_notifier_change_info
*change_info
;
3488 struct netdev_notifier_changeupper_info
*info
;
3489 struct inet6_dev
*idev
= __in6_dev_get(dev
);
3490 struct net
*net
= dev_net(dev
);
3491 int run_pending
= 0;
3495 case NETDEV_REGISTER
:
3496 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
3497 idev
= ipv6_add_dev(dev
);
3499 return notifier_from_errno(PTR_ERR(idev
));
3503 case NETDEV_CHANGEMTU
:
3504 /* if MTU under IPV6_MIN_MTU stop IPv6 on this interface. */
3505 if (dev
->mtu
< IPV6_MIN_MTU
) {
3506 addrconf_ifdown(dev
, dev
!= net
->loopback_dev
);
3511 rt6_mtu_change(dev
, dev
->mtu
);
3512 idev
->cnf
.mtu6
= dev
->mtu
;
3516 /* allocate new idev */
3517 idev
= ipv6_add_dev(dev
);
3521 /* device is still not ready */
3522 if (!(idev
->if_flags
& IF_READY
))
3531 if (dev
->flags
& IFF_SLAVE
)
3534 if (idev
&& idev
->cnf
.disable_ipv6
)
3537 if (event
== NETDEV_UP
) {
3538 /* restore routes for permanent addresses */
3539 addrconf_permanent_addr(net
, dev
);
3541 if (!addrconf_link_ready(dev
)) {
3542 /* device is not ready yet. */
3543 pr_debug("ADDRCONF(NETDEV_UP): %s: link is not ready\n",
3548 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
3549 idev
= ipv6_add_dev(dev
);
3551 if (!IS_ERR_OR_NULL(idev
)) {
3552 idev
->if_flags
|= IF_READY
;
3555 } else if (event
== NETDEV_CHANGE
) {
3556 if (!addrconf_link_ready(dev
)) {
3557 /* device is still not ready. */
3558 rt6_sync_down_dev(dev
, event
);
3562 if (!IS_ERR_OR_NULL(idev
)) {
3563 if (idev
->if_flags
& IF_READY
) {
3564 /* device is already configured -
3565 * but resend MLD reports, we might
3566 * have roamed and need to update
3567 * multicast snooping switches
3571 if (change_info
->flags_changed
& IFF_NOARP
)
3572 addrconf_dad_run(idev
, true);
3573 rt6_sync_up(dev
, RTNH_F_LINKDOWN
);
3576 idev
->if_flags
|= IF_READY
;
3579 pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n",
3585 switch (dev
->type
) {
3586 #if IS_ENABLED(CONFIG_IPV6_SIT)
3588 addrconf_sit_config(dev
);
3591 #if IS_ENABLED(CONFIG_NET_IPGRE)
3593 addrconf_gre_config(dev
);
3596 case ARPHRD_LOOPBACK
:
3601 addrconf_dev_config(dev
);
3605 if (!IS_ERR_OR_NULL(idev
)) {
3607 addrconf_dad_run(idev
, false);
3609 /* Device has an address by now */
3610 rt6_sync_up(dev
, RTNH_F_DEAD
);
3613 * If the MTU changed during the interface down,
3614 * when the interface up, the changed MTU must be
3615 * reflected in the idev as well as routers.
3617 if (idev
->cnf
.mtu6
!= dev
->mtu
&&
3618 dev
->mtu
>= IPV6_MIN_MTU
) {
3619 rt6_mtu_change(dev
, dev
->mtu
);
3620 idev
->cnf
.mtu6
= dev
->mtu
;
3622 idev
->tstamp
= jiffies
;
3623 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
3626 * If the changed mtu during down is lower than
3627 * IPV6_MIN_MTU stop IPv6 on this interface.
3629 if (dev
->mtu
< IPV6_MIN_MTU
)
3630 addrconf_ifdown(dev
, dev
!= net
->loopback_dev
);
3635 case NETDEV_UNREGISTER
:
3637 * Remove all addresses from this interface.
3639 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
3642 case NETDEV_CHANGENAME
:
3644 snmp6_unregister_dev(idev
);
3645 addrconf_sysctl_unregister(idev
);
3646 err
= addrconf_sysctl_register(idev
);
3648 return notifier_from_errno(err
);
3649 err
= snmp6_register_dev(idev
);
3651 addrconf_sysctl_unregister(idev
);
3652 return notifier_from_errno(err
);
3657 case NETDEV_PRE_TYPE_CHANGE
:
3658 case NETDEV_POST_TYPE_CHANGE
:
3660 addrconf_type_change(dev
, event
);
3663 case NETDEV_CHANGEUPPER
:
3666 /* flush all routes if dev is linked to or unlinked from
3667 * an L3 master device (e.g., VRF)
3669 if (info
->upper_dev
&& netif_is_l3_master(info
->upper_dev
))
3670 addrconf_ifdown(dev
, 0);
3677 * addrconf module should be notified of a device going up
3679 static struct notifier_block ipv6_dev_notf
= {
3680 .notifier_call
= addrconf_notify
,
3681 .priority
= ADDRCONF_NOTIFY_PRIORITY
,
3684 static void addrconf_type_change(struct net_device
*dev
, unsigned long event
)
3686 struct inet6_dev
*idev
;
3689 idev
= __in6_dev_get(dev
);
3691 if (event
== NETDEV_POST_TYPE_CHANGE
)
3692 ipv6_mc_remap(idev
);
3693 else if (event
== NETDEV_PRE_TYPE_CHANGE
)
3694 ipv6_mc_unmap(idev
);
3697 static bool addr_is_local(const struct in6_addr
*addr
)
3699 return ipv6_addr_type(addr
) &
3700 (IPV6_ADDR_LINKLOCAL
| IPV6_ADDR_LOOPBACK
);
3703 static int addrconf_ifdown(struct net_device
*dev
, int how
)
3705 unsigned long event
= how
? NETDEV_UNREGISTER
: NETDEV_DOWN
;
3706 struct net
*net
= dev_net(dev
);
3707 struct inet6_dev
*idev
;
3708 struct inet6_ifaddr
*ifa
, *tmp
;
3709 bool keep_addr
= false;
3714 rt6_disable_ip(dev
, event
);
3716 idev
= __in6_dev_get(dev
);
3721 * Step 1: remove reference to ipv6 device from parent device.
3727 /* protected by rtnl_lock */
3728 RCU_INIT_POINTER(dev
->ip6_ptr
, NULL
);
3730 /* Step 1.5: remove snmp6 entry */
3731 snmp6_unregister_dev(idev
);
3735 /* combine the user config with event to determine if permanent
3736 * addresses are to be removed from address hash table
3738 if (!how
&& !idev
->cnf
.disable_ipv6
) {
3739 /* aggregate the system setting and interface setting */
3740 int _keep_addr
= net
->ipv6
.devconf_all
->keep_addr_on_down
;
3743 _keep_addr
= idev
->cnf
.keep_addr_on_down
;
3745 keep_addr
= (_keep_addr
> 0);
3748 /* Step 2: clear hash table */
3749 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
3750 struct hlist_head
*h
= &inet6_addr_lst
[i
];
3752 spin_lock_bh(&addrconf_hash_lock
);
3754 hlist_for_each_entry_rcu(ifa
, h
, addr_lst
) {
3755 if (ifa
->idev
== idev
) {
3756 addrconf_del_dad_work(ifa
);
3757 /* combined flag + permanent flag decide if
3758 * address is retained on a down event
3761 !(ifa
->flags
& IFA_F_PERMANENT
) ||
3762 addr_is_local(&ifa
->addr
)) {
3763 hlist_del_init_rcu(&ifa
->addr_lst
);
3768 spin_unlock_bh(&addrconf_hash_lock
);
3771 write_lock_bh(&idev
->lock
);
3773 addrconf_del_rs_timer(idev
);
3775 /* Step 2: clear flags for stateless addrconf */
3777 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
3779 /* Step 3: clear tempaddr list */
3780 while (!list_empty(&idev
->tempaddr_list
)) {
3781 ifa
= list_first_entry(&idev
->tempaddr_list
,
3782 struct inet6_ifaddr
, tmp_list
);
3783 list_del(&ifa
->tmp_list
);
3784 write_unlock_bh(&idev
->lock
);
3785 spin_lock_bh(&ifa
->lock
);
3788 in6_ifa_put(ifa
->ifpub
);
3791 spin_unlock_bh(&ifa
->lock
);
3793 write_lock_bh(&idev
->lock
);
3796 list_for_each_entry_safe(ifa
, tmp
, &idev
->addr_list
, if_list
) {
3797 struct fib6_info
*rt
= NULL
;
3800 addrconf_del_dad_work(ifa
);
3802 keep
= keep_addr
&& (ifa
->flags
& IFA_F_PERMANENT
) &&
3803 !addr_is_local(&ifa
->addr
);
3805 write_unlock_bh(&idev
->lock
);
3806 spin_lock_bh(&ifa
->lock
);
3809 /* set state to skip the notifier below */
3810 state
= INET6_IFADDR_STATE_DEAD
;
3811 ifa
->state
= INET6_IFADDR_STATE_PREDAD
;
3812 if (!(ifa
->flags
& IFA_F_NODAD
))
3813 ifa
->flags
|= IFA_F_TENTATIVE
;
3819 ifa
->state
= INET6_IFADDR_STATE_DEAD
;
3822 spin_unlock_bh(&ifa
->lock
);
3825 ip6_del_rt(net
, rt
);
3827 if (state
!= INET6_IFADDR_STATE_DEAD
) {
3828 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
3829 inet6addr_notifier_call_chain(NETDEV_DOWN
, ifa
);
3831 if (idev
->cnf
.forwarding
)
3832 addrconf_leave_anycast(ifa
);
3833 addrconf_leave_solict(ifa
->idev
, &ifa
->addr
);
3836 write_lock_bh(&idev
->lock
);
3838 list_del_rcu(&ifa
->if_list
);
3843 write_unlock_bh(&idev
->lock
);
3845 /* Step 5: Discard anycast and multicast list */
3847 ipv6_ac_destroy_dev(idev
);
3848 ipv6_mc_destroy_dev(idev
);
3853 idev
->tstamp
= jiffies
;
3855 /* Last: Shot the device (if unregistered) */
3857 addrconf_sysctl_unregister(idev
);
3858 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
3859 neigh_ifdown(&nd_tbl
, dev
);
3865 static void addrconf_rs_timer(struct timer_list
*t
)
3867 struct inet6_dev
*idev
= from_timer(idev
, t
, rs_timer
);
3868 struct net_device
*dev
= idev
->dev
;
3869 struct in6_addr lladdr
;
3871 write_lock(&idev
->lock
);
3872 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
))
3875 if (!ipv6_accept_ra(idev
))
3878 /* Announcement received after solicitation was sent */
3879 if (idev
->if_flags
& IF_RA_RCVD
)
3882 if (idev
->rs_probes
++ < idev
->cnf
.rtr_solicits
|| idev
->cnf
.rtr_solicits
< 0) {
3883 write_unlock(&idev
->lock
);
3884 if (!ipv6_get_lladdr(dev
, &lladdr
, IFA_F_TENTATIVE
))
3885 ndisc_send_rs(dev
, &lladdr
,
3886 &in6addr_linklocal_allrouters
);
3890 write_lock(&idev
->lock
);
3891 idev
->rs_interval
= rfc3315_s14_backoff_update(
3892 idev
->rs_interval
, idev
->cnf
.rtr_solicit_max_interval
);
3893 /* The wait after the last probe can be shorter */
3894 addrconf_mod_rs_timer(idev
, (idev
->rs_probes
==
3895 idev
->cnf
.rtr_solicits
) ?
3896 idev
->cnf
.rtr_solicit_delay
:
3900 * Note: we do not support deprecated "all on-link"
3901 * assumption any longer.
3903 pr_debug("%s: no IPv6 routers present\n", idev
->dev
->name
);
3907 write_unlock(&idev
->lock
);
3913 * Duplicate Address Detection
3915 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
3917 unsigned long rand_num
;
3918 struct inet6_dev
*idev
= ifp
->idev
;
3921 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
3924 rand_num
= prandom_u32() % (idev
->cnf
.rtr_solicit_delay
? : 1);
3927 if (idev
->cnf
.enhanced_dad
||
3928 dev_net(idev
->dev
)->ipv6
.devconf_all
->enhanced_dad
) {
3930 get_random_bytes(&nonce
, 6);
3933 ifp
->dad_nonce
= nonce
;
3934 ifp
->dad_probes
= idev
->cnf
.dad_transmits
;
3935 addrconf_mod_dad_work(ifp
, rand_num
);
3938 static void addrconf_dad_begin(struct inet6_ifaddr
*ifp
)
3940 struct inet6_dev
*idev
= ifp
->idev
;
3941 struct net_device
*dev
= idev
->dev
;
3942 bool bump_id
, notify
= false;
3945 addrconf_join_solict(dev
, &ifp
->addr
);
3947 prandom_seed((__force u32
) ifp
->addr
.s6_addr32
[3]);
3949 read_lock_bh(&idev
->lock
);
3950 spin_lock(&ifp
->lock
);
3951 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
)
3955 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
3956 (net
->ipv6
.devconf_all
->accept_dad
< 1 &&
3957 idev
->cnf
.accept_dad
< 1) ||
3958 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
3959 ifp
->flags
& IFA_F_NODAD
) {
3960 bool send_na
= false;
3962 if (ifp
->flags
& IFA_F_TENTATIVE
&&
3963 !(ifp
->flags
& IFA_F_OPTIMISTIC
))
3965 bump_id
= ifp
->flags
& IFA_F_TENTATIVE
;
3966 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3967 spin_unlock(&ifp
->lock
);
3968 read_unlock_bh(&idev
->lock
);
3970 addrconf_dad_completed(ifp
, bump_id
, send_na
);
3974 if (!(idev
->if_flags
& IF_READY
)) {
3975 spin_unlock(&ifp
->lock
);
3976 read_unlock_bh(&idev
->lock
);
3978 * If the device is not ready:
3979 * - keep it tentative if it is a permanent address.
3980 * - otherwise, kill it.
3983 addrconf_dad_stop(ifp
, 0);
3988 * Optimistic nodes can start receiving
3991 if (ifp
->flags
& IFA_F_OPTIMISTIC
) {
3992 ip6_ins_rt(net
, ifp
->rt
);
3993 if (ipv6_use_optimistic_addr(net
, idev
)) {
3994 /* Because optimistic nodes can use this address,
3995 * notify listeners. If DAD fails, RTM_DELADDR is sent.
4001 addrconf_dad_kick(ifp
);
4003 spin_unlock(&ifp
->lock
);
4004 read_unlock_bh(&idev
->lock
);
4006 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
4009 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
)
4011 bool begin_dad
= false;
4013 spin_lock_bh(&ifp
->lock
);
4014 if (ifp
->state
!= INET6_IFADDR_STATE_DEAD
) {
4015 ifp
->state
= INET6_IFADDR_STATE_PREDAD
;
4018 spin_unlock_bh(&ifp
->lock
);
4021 addrconf_mod_dad_work(ifp
, 0);
4024 static void addrconf_dad_work(struct work_struct
*w
)
4026 struct inet6_ifaddr
*ifp
= container_of(to_delayed_work(w
),
4027 struct inet6_ifaddr
,
4029 struct inet6_dev
*idev
= ifp
->idev
;
4030 bool bump_id
, disable_ipv6
= false;
4031 struct in6_addr mcaddr
;
4037 } action
= DAD_PROCESS
;
4041 spin_lock_bh(&ifp
->lock
);
4042 if (ifp
->state
== INET6_IFADDR_STATE_PREDAD
) {
4044 ifp
->state
= INET6_IFADDR_STATE_DAD
;
4045 } else if (ifp
->state
== INET6_IFADDR_STATE_ERRDAD
) {
4047 ifp
->state
= INET6_IFADDR_STATE_POSTDAD
;
4049 if ((dev_net(idev
->dev
)->ipv6
.devconf_all
->accept_dad
> 1 ||
4050 idev
->cnf
.accept_dad
> 1) &&
4051 !idev
->cnf
.disable_ipv6
&&
4052 !(ifp
->flags
& IFA_F_STABLE_PRIVACY
)) {
4053 struct in6_addr addr
;
4055 addr
.s6_addr32
[0] = htonl(0xfe800000);
4056 addr
.s6_addr32
[1] = 0;
4058 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) &&
4059 ipv6_addr_equal(&ifp
->addr
, &addr
)) {
4060 /* DAD failed for link-local based on MAC */
4061 idev
->cnf
.disable_ipv6
= 1;
4063 pr_info("%s: IPv6 being disabled!\n",
4064 ifp
->idev
->dev
->name
);
4065 disable_ipv6
= true;
4069 spin_unlock_bh(&ifp
->lock
);
4071 if (action
== DAD_BEGIN
) {
4072 addrconf_dad_begin(ifp
);
4074 } else if (action
== DAD_ABORT
) {
4076 addrconf_dad_stop(ifp
, 1);
4078 addrconf_ifdown(idev
->dev
, 0);
4082 if (!ifp
->dad_probes
&& addrconf_dad_end(ifp
))
4085 write_lock_bh(&idev
->lock
);
4086 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
)) {
4087 write_unlock_bh(&idev
->lock
);
4091 spin_lock(&ifp
->lock
);
4092 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
) {
4093 spin_unlock(&ifp
->lock
);
4094 write_unlock_bh(&idev
->lock
);
4098 if (ifp
->dad_probes
== 0) {
4099 bool send_na
= false;
4102 * DAD was successful
4105 if (ifp
->flags
& IFA_F_TENTATIVE
&&
4106 !(ifp
->flags
& IFA_F_OPTIMISTIC
))
4108 bump_id
= ifp
->flags
& IFA_F_TENTATIVE
;
4109 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
4110 spin_unlock(&ifp
->lock
);
4111 write_unlock_bh(&idev
->lock
);
4113 addrconf_dad_completed(ifp
, bump_id
, send_na
);
4119 addrconf_mod_dad_work(ifp
,
4120 NEIGH_VAR(ifp
->idev
->nd_parms
, RETRANS_TIME
));
4121 spin_unlock(&ifp
->lock
);
4122 write_unlock_bh(&idev
->lock
);
4124 /* send a neighbour solicitation for our addr */
4125 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
4126 ndisc_send_ns(ifp
->idev
->dev
, &ifp
->addr
, &mcaddr
, &in6addr_any
,
4133 /* ifp->idev must be at least read locked */
4134 static bool ipv6_lonely_lladdr(struct inet6_ifaddr
*ifp
)
4136 struct inet6_ifaddr
*ifpiter
;
4137 struct inet6_dev
*idev
= ifp
->idev
;
4139 list_for_each_entry_reverse(ifpiter
, &idev
->addr_list
, if_list
) {
4140 if (ifpiter
->scope
> IFA_LINK
)
4142 if (ifp
!= ifpiter
&& ifpiter
->scope
== IFA_LINK
&&
4143 (ifpiter
->flags
& (IFA_F_PERMANENT
|IFA_F_TENTATIVE
|
4144 IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
)) ==
4151 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
, bool bump_id
,
4154 struct net_device
*dev
= ifp
->idev
->dev
;
4155 struct in6_addr lladdr
;
4156 bool send_rs
, send_mld
;
4158 addrconf_del_dad_work(ifp
);
4161 * Configure the address for reception. Now it is valid.
4164 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
4166 /* If added prefix is link local and we are prepared to process
4167 router advertisements, start sending router solicitations.
4170 read_lock_bh(&ifp
->idev
->lock
);
4171 send_mld
= ifp
->scope
== IFA_LINK
&& ipv6_lonely_lladdr(ifp
);
4172 send_rs
= send_mld
&&
4173 ipv6_accept_ra(ifp
->idev
) &&
4174 ifp
->idev
->cnf
.rtr_solicits
!= 0 &&
4175 (dev
->flags
&IFF_LOOPBACK
) == 0;
4176 read_unlock_bh(&ifp
->idev
->lock
);
4178 /* While dad is in progress mld report's source address is in6_addrany.
4179 * Resend with proper ll now.
4182 ipv6_mc_dad_complete(ifp
->idev
);
4184 /* send unsolicited NA if enabled */
4186 (ifp
->idev
->cnf
.ndisc_notify
||
4187 dev_net(dev
)->ipv6
.devconf_all
->ndisc_notify
)) {
4188 ndisc_send_na(dev
, &in6addr_linklocal_allnodes
, &ifp
->addr
,
4189 /*router=*/ !!ifp
->idev
->cnf
.forwarding
,
4190 /*solicited=*/ false, /*override=*/ true,
4196 * If a host as already performed a random delay
4197 * [...] as part of DAD [...] there is no need
4198 * to delay again before sending the first RS
4200 if (ipv6_get_lladdr(dev
, &lladdr
, IFA_F_TENTATIVE
))
4202 ndisc_send_rs(dev
, &lladdr
, &in6addr_linklocal_allrouters
);
4204 write_lock_bh(&ifp
->idev
->lock
);
4205 spin_lock(&ifp
->lock
);
4206 ifp
->idev
->rs_interval
= rfc3315_s14_backoff_init(
4207 ifp
->idev
->cnf
.rtr_solicit_interval
);
4208 ifp
->idev
->rs_probes
= 1;
4209 ifp
->idev
->if_flags
|= IF_RS_SENT
;
4210 addrconf_mod_rs_timer(ifp
->idev
, ifp
->idev
->rs_interval
);
4211 spin_unlock(&ifp
->lock
);
4212 write_unlock_bh(&ifp
->idev
->lock
);
4216 rt_genid_bump_ipv6(dev_net(dev
));
4218 /* Make sure that a new temporary address will be created
4219 * before this temporary address becomes deprecated.
4221 if (ifp
->flags
& IFA_F_TEMPORARY
)
4222 addrconf_verify_rtnl();
4225 static void addrconf_dad_run(struct inet6_dev
*idev
, bool restart
)
4227 struct inet6_ifaddr
*ifp
;
4229 read_lock_bh(&idev
->lock
);
4230 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
4231 spin_lock(&ifp
->lock
);
4232 if ((ifp
->flags
& IFA_F_TENTATIVE
&&
4233 ifp
->state
== INET6_IFADDR_STATE_DAD
) || restart
) {
4235 ifp
->state
= INET6_IFADDR_STATE_PREDAD
;
4236 addrconf_dad_kick(ifp
);
4238 spin_unlock(&ifp
->lock
);
4240 read_unlock_bh(&idev
->lock
);
4243 #ifdef CONFIG_PROC_FS
4244 struct if6_iter_state
{
4245 struct seq_net_private p
;
4250 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
, loff_t pos
)
4252 struct if6_iter_state
*state
= seq
->private;
4253 struct net
*net
= seq_file_net(seq
);
4254 struct inet6_ifaddr
*ifa
= NULL
;
4257 /* initial bucket if pos is 0 */
4263 for (; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
4264 hlist_for_each_entry_rcu(ifa
, &inet6_addr_lst
[state
->bucket
],
4266 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
4268 /* sync with offset */
4269 if (p
< state
->offset
) {
4276 /* prepare for next bucket */
4283 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
,
4284 struct inet6_ifaddr
*ifa
)
4286 struct if6_iter_state
*state
= seq
->private;
4287 struct net
*net
= seq_file_net(seq
);
4289 hlist_for_each_entry_continue_rcu(ifa
, addr_lst
) {
4290 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
4297 while (++state
->bucket
< IN6_ADDR_HSIZE
) {
4298 hlist_for_each_entry_rcu(ifa
,
4299 &inet6_addr_lst
[state
->bucket
], addr_lst
) {
4300 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
4309 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
4313 return if6_get_first(seq
, *pos
);
4316 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
4318 struct inet6_ifaddr
*ifa
;
4320 ifa
= if6_get_next(seq
, v
);
4325 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
4331 static int if6_seq_show(struct seq_file
*seq
, void *v
)
4333 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
4334 seq_printf(seq
, "%pi6 %02x %02x %02x %02x %8s\n",
4336 ifp
->idev
->dev
->ifindex
,
4340 ifp
->idev
->dev
->name
);
4344 static const struct seq_operations if6_seq_ops
= {
4345 .start
= if6_seq_start
,
4346 .next
= if6_seq_next
,
4347 .show
= if6_seq_show
,
4348 .stop
= if6_seq_stop
,
4351 static int __net_init
if6_proc_net_init(struct net
*net
)
4353 if (!proc_create_net("if_inet6", 0444, net
->proc_net
, &if6_seq_ops
,
4354 sizeof(struct if6_iter_state
)))
4359 static void __net_exit
if6_proc_net_exit(struct net
*net
)
4361 remove_proc_entry("if_inet6", net
->proc_net
);
4364 static struct pernet_operations if6_proc_net_ops
= {
4365 .init
= if6_proc_net_init
,
4366 .exit
= if6_proc_net_exit
,
4369 int __init
if6_proc_init(void)
4371 return register_pernet_subsys(&if6_proc_net_ops
);
4374 void if6_proc_exit(void)
4376 unregister_pernet_subsys(&if6_proc_net_ops
);
4378 #endif /* CONFIG_PROC_FS */
4380 #if IS_ENABLED(CONFIG_IPV6_MIP6)
4381 /* Check if address is a home address configured on any interface. */
4382 int ipv6_chk_home_addr(struct net
*net
, const struct in6_addr
*addr
)
4384 unsigned int hash
= inet6_addr_hash(net
, addr
);
4385 struct inet6_ifaddr
*ifp
= NULL
;
4389 hlist_for_each_entry_rcu(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
4390 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
4392 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
4393 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
4404 * Periodic address status verification
4407 static void addrconf_verify_rtnl(void)
4409 unsigned long now
, next
, next_sec
, next_sched
;
4410 struct inet6_ifaddr
*ifp
;
4417 next
= round_jiffies_up(now
+ ADDR_CHECK_FREQUENCY
);
4419 cancel_delayed_work(&addr_chk_work
);
4421 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
4423 hlist_for_each_entry_rcu_bh(ifp
, &inet6_addr_lst
[i
], addr_lst
) {
4426 /* When setting preferred_lft to a value not zero or
4427 * infinity, while valid_lft is infinity
4428 * IFA_F_PERMANENT has a non-infinity life time.
4430 if ((ifp
->flags
& IFA_F_PERMANENT
) &&
4431 (ifp
->prefered_lft
== INFINITY_LIFE_TIME
))
4434 spin_lock(&ifp
->lock
);
4435 /* We try to batch several events at once. */
4436 age
= (now
- ifp
->tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
4438 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
4439 age
>= ifp
->valid_lft
) {
4440 spin_unlock(&ifp
->lock
);
4444 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
4445 spin_unlock(&ifp
->lock
);
4447 } else if (age
>= ifp
->prefered_lft
) {
4448 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
4451 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
4453 ifp
->flags
|= IFA_F_DEPRECATED
;
4456 if ((ifp
->valid_lft
!= INFINITY_LIFE_TIME
) &&
4457 (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
)))
4458 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
4460 spin_unlock(&ifp
->lock
);
4465 ipv6_ifa_notify(0, ifp
);
4469 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
4470 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
4471 unsigned long regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
4472 ifp
->idev
->cnf
.dad_transmits
*
4473 NEIGH_VAR(ifp
->idev
->nd_parms
, RETRANS_TIME
) / HZ
;
4475 if (age
>= ifp
->prefered_lft
- regen_advance
) {
4476 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
4477 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
4478 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
4479 if (!ifp
->regen_count
&& ifpub
) {
4482 in6_ifa_hold(ifpub
);
4483 spin_unlock(&ifp
->lock
);
4485 spin_lock(&ifpub
->lock
);
4486 ifpub
->regen_count
= 0;
4487 spin_unlock(&ifpub
->lock
);
4488 rcu_read_unlock_bh();
4489 ipv6_create_tempaddr(ifpub
, ifp
, true);
4495 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
4496 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
4497 spin_unlock(&ifp
->lock
);
4499 /* ifp->prefered_lft <= ifp->valid_lft */
4500 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
4501 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
4502 spin_unlock(&ifp
->lock
);
4507 next_sec
= round_jiffies_up(next
);
4510 /* If rounded timeout is accurate enough, accept it. */
4511 if (time_before(next_sec
, next
+ ADDRCONF_TIMER_FUZZ
))
4512 next_sched
= next_sec
;
4514 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
4515 if (time_before(next_sched
, jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
))
4516 next_sched
= jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
;
4518 pr_debug("now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
4519 now
, next
, next_sec
, next_sched
);
4520 mod_delayed_work(addrconf_wq
, &addr_chk_work
, next_sched
- now
);
4521 rcu_read_unlock_bh();
4524 static void addrconf_verify_work(struct work_struct
*w
)
4527 addrconf_verify_rtnl();
4531 static void addrconf_verify(void)
4533 mod_delayed_work(addrconf_wq
, &addr_chk_work
, 0);
4536 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
,
4537 struct in6_addr
**peer_pfx
)
4539 struct in6_addr
*pfx
= NULL
;
4544 pfx
= nla_data(addr
);
4547 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
4549 pfx
= nla_data(local
);
4555 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
4556 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
4557 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
4558 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
4559 [IFA_FLAGS
] = { .len
= sizeof(u32
) },
4560 [IFA_RT_PRIORITY
] = { .len
= sizeof(u32
) },
4561 [IFA_TARGET_NETNSID
] = { .type
= NLA_S32
},
4565 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
4566 struct netlink_ext_ack
*extack
)
4568 struct net
*net
= sock_net(skb
->sk
);
4569 struct ifaddrmsg
*ifm
;
4570 struct nlattr
*tb
[IFA_MAX
+1];
4571 struct in6_addr
*pfx
, *peer_pfx
;
4575 err
= nlmsg_parse_deprecated(nlh
, sizeof(*ifm
), tb
, IFA_MAX
,
4576 ifa_ipv6_policy
, extack
);
4580 ifm
= nlmsg_data(nlh
);
4581 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer_pfx
);
4585 ifa_flags
= tb
[IFA_FLAGS
] ? nla_get_u32(tb
[IFA_FLAGS
]) : ifm
->ifa_flags
;
4587 /* We ignore other flags so far. */
4588 ifa_flags
&= IFA_F_MANAGETEMPADDR
;
4590 return inet6_addr_del(net
, ifm
->ifa_index
, ifa_flags
, pfx
,
4591 ifm
->ifa_prefixlen
);
4594 static int modify_prefix_route(struct inet6_ifaddr
*ifp
,
4595 unsigned long expires
, u32 flags
,
4598 struct fib6_info
*f6i
;
4601 f6i
= addrconf_get_prefix_route(modify_peer
? &ifp
->peer_addr
: &ifp
->addr
,
4603 ifp
->idev
->dev
, 0, RTF_DEFAULT
, true);
4607 prio
= ifp
->rt_priority
? : IP6_RT_PRIO_ADDRCONF
;
4608 if (f6i
->fib6_metric
!= prio
) {
4609 /* delete old one */
4610 ip6_del_rt(dev_net(ifp
->idev
->dev
), f6i
);
4613 addrconf_prefix_route(modify_peer
? &ifp
->peer_addr
: &ifp
->addr
,
4615 ifp
->rt_priority
, ifp
->idev
->dev
,
4616 expires
, flags
, GFP_KERNEL
);
4619 fib6_clean_expires(f6i
);
4621 fib6_set_expires(f6i
, expires
);
4623 fib6_info_release(f6i
);
4629 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, struct ifa6_config
*cfg
)
4633 unsigned long timeout
;
4634 bool was_managetempaddr
;
4635 bool had_prefixroute
;
4636 bool new_peer
= false;
4640 if (!cfg
->valid_lft
|| cfg
->preferred_lft
> cfg
->valid_lft
)
4643 if (cfg
->ifa_flags
& IFA_F_MANAGETEMPADDR
&&
4644 (ifp
->flags
& IFA_F_TEMPORARY
|| ifp
->prefix_len
!= 64))
4647 if (!(ifp
->flags
& IFA_F_TENTATIVE
) || ifp
->flags
& IFA_F_DADFAILED
)
4648 cfg
->ifa_flags
&= ~IFA_F_OPTIMISTIC
;
4650 timeout
= addrconf_timeout_fixup(cfg
->valid_lft
, HZ
);
4651 if (addrconf_finite_timeout(timeout
)) {
4652 expires
= jiffies_to_clock_t(timeout
* HZ
);
4653 cfg
->valid_lft
= timeout
;
4654 flags
= RTF_EXPIRES
;
4658 cfg
->ifa_flags
|= IFA_F_PERMANENT
;
4661 timeout
= addrconf_timeout_fixup(cfg
->preferred_lft
, HZ
);
4662 if (addrconf_finite_timeout(timeout
)) {
4664 cfg
->ifa_flags
|= IFA_F_DEPRECATED
;
4665 cfg
->preferred_lft
= timeout
;
4668 if (cfg
->peer_pfx
&&
4669 memcmp(&ifp
->peer_addr
, cfg
->peer_pfx
, sizeof(struct in6_addr
))) {
4670 if (!ipv6_addr_any(&ifp
->peer_addr
))
4671 cleanup_prefix_route(ifp
, expires
, true, true);
4675 spin_lock_bh(&ifp
->lock
);
4676 was_managetempaddr
= ifp
->flags
& IFA_F_MANAGETEMPADDR
;
4677 had_prefixroute
= ifp
->flags
& IFA_F_PERMANENT
&&
4678 !(ifp
->flags
& IFA_F_NOPREFIXROUTE
);
4679 ifp
->flags
&= ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
|
4680 IFA_F_HOMEADDRESS
| IFA_F_MANAGETEMPADDR
|
4681 IFA_F_NOPREFIXROUTE
);
4682 ifp
->flags
|= cfg
->ifa_flags
;
4683 ifp
->tstamp
= jiffies
;
4684 ifp
->valid_lft
= cfg
->valid_lft
;
4685 ifp
->prefered_lft
= cfg
->preferred_lft
;
4687 if (cfg
->rt_priority
&& cfg
->rt_priority
!= ifp
->rt_priority
)
4688 ifp
->rt_priority
= cfg
->rt_priority
;
4691 ifp
->peer_addr
= *cfg
->peer_pfx
;
4693 spin_unlock_bh(&ifp
->lock
);
4694 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
4695 ipv6_ifa_notify(0, ifp
);
4697 if (!(cfg
->ifa_flags
& IFA_F_NOPREFIXROUTE
)) {
4700 if (had_prefixroute
)
4701 rc
= modify_prefix_route(ifp
, expires
, flags
, false);
4703 /* prefix route could have been deleted; if so restore it */
4704 if (rc
== -ENOENT
) {
4705 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
,
4706 ifp
->rt_priority
, ifp
->idev
->dev
,
4707 expires
, flags
, GFP_KERNEL
);
4710 if (had_prefixroute
&& !ipv6_addr_any(&ifp
->peer_addr
))
4711 rc
= modify_prefix_route(ifp
, expires
, flags
, true);
4713 if (rc
== -ENOENT
&& !ipv6_addr_any(&ifp
->peer_addr
)) {
4714 addrconf_prefix_route(&ifp
->peer_addr
, ifp
->prefix_len
,
4715 ifp
->rt_priority
, ifp
->idev
->dev
,
4716 expires
, flags
, GFP_KERNEL
);
4718 } else if (had_prefixroute
) {
4719 enum cleanup_prefix_rt_t action
;
4720 unsigned long rt_expires
;
4722 write_lock_bh(&ifp
->idev
->lock
);
4723 action
= check_cleanup_prefix_route(ifp
, &rt_expires
);
4724 write_unlock_bh(&ifp
->idev
->lock
);
4726 if (action
!= CLEANUP_PREFIX_RT_NOP
) {
4727 cleanup_prefix_route(ifp
, rt_expires
,
4728 action
== CLEANUP_PREFIX_RT_DEL
, false);
4732 if (was_managetempaddr
|| ifp
->flags
& IFA_F_MANAGETEMPADDR
) {
4733 if (was_managetempaddr
&&
4734 !(ifp
->flags
& IFA_F_MANAGETEMPADDR
)) {
4736 cfg
->preferred_lft
= 0;
4738 manage_tempaddrs(ifp
->idev
, ifp
, cfg
->valid_lft
,
4739 cfg
->preferred_lft
, !was_managetempaddr
,
4743 addrconf_verify_rtnl();
4749 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
4750 struct netlink_ext_ack
*extack
)
4752 struct net
*net
= sock_net(skb
->sk
);
4753 struct ifaddrmsg
*ifm
;
4754 struct nlattr
*tb
[IFA_MAX
+1];
4755 struct in6_addr
*peer_pfx
;
4756 struct inet6_ifaddr
*ifa
;
4757 struct net_device
*dev
;
4758 struct inet6_dev
*idev
;
4759 struct ifa6_config cfg
;
4762 err
= nlmsg_parse_deprecated(nlh
, sizeof(*ifm
), tb
, IFA_MAX
,
4763 ifa_ipv6_policy
, extack
);
4767 memset(&cfg
, 0, sizeof(cfg
));
4769 ifm
= nlmsg_data(nlh
);
4770 cfg
.pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer_pfx
);
4774 cfg
.peer_pfx
= peer_pfx
;
4775 cfg
.plen
= ifm
->ifa_prefixlen
;
4776 if (tb
[IFA_RT_PRIORITY
])
4777 cfg
.rt_priority
= nla_get_u32(tb
[IFA_RT_PRIORITY
]);
4779 cfg
.valid_lft
= INFINITY_LIFE_TIME
;
4780 cfg
.preferred_lft
= INFINITY_LIFE_TIME
;
4782 if (tb
[IFA_CACHEINFO
]) {
4783 struct ifa_cacheinfo
*ci
;
4785 ci
= nla_data(tb
[IFA_CACHEINFO
]);
4786 cfg
.valid_lft
= ci
->ifa_valid
;
4787 cfg
.preferred_lft
= ci
->ifa_prefered
;
4790 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
4795 cfg
.ifa_flags
= nla_get_u32(tb
[IFA_FLAGS
]);
4797 cfg
.ifa_flags
= ifm
->ifa_flags
;
4799 /* We ignore other flags so far. */
4800 cfg
.ifa_flags
&= IFA_F_NODAD
| IFA_F_HOMEADDRESS
|
4801 IFA_F_MANAGETEMPADDR
| IFA_F_NOPREFIXROUTE
|
4802 IFA_F_MCAUTOJOIN
| IFA_F_OPTIMISTIC
;
4804 idev
= ipv6_find_idev(dev
);
4806 return PTR_ERR(idev
);
4808 if (!ipv6_allow_optimistic_dad(net
, idev
))
4809 cfg
.ifa_flags
&= ~IFA_F_OPTIMISTIC
;
4811 if (cfg
.ifa_flags
& IFA_F_NODAD
&&
4812 cfg
.ifa_flags
& IFA_F_OPTIMISTIC
) {
4813 NL_SET_ERR_MSG(extack
, "IFA_F_NODAD and IFA_F_OPTIMISTIC are mutually exclusive");
4817 ifa
= ipv6_get_ifaddr(net
, cfg
.pfx
, dev
, 1);
4820 * It would be best to check for !NLM_F_CREATE here but
4821 * userspace already relies on not having to provide this.
4823 return inet6_addr_add(net
, ifm
->ifa_index
, &cfg
, extack
);
4826 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
4827 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
4830 err
= inet6_addr_modify(ifa
, &cfg
);
4837 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u32 flags
,
4838 u8 scope
, int ifindex
)
4840 struct ifaddrmsg
*ifm
;
4842 ifm
= nlmsg_data(nlh
);
4843 ifm
->ifa_family
= AF_INET6
;
4844 ifm
->ifa_prefixlen
= prefixlen
;
4845 ifm
->ifa_flags
= flags
;
4846 ifm
->ifa_scope
= scope
;
4847 ifm
->ifa_index
= ifindex
;
4850 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
4851 unsigned long tstamp
, u32 preferred
, u32 valid
)
4853 struct ifa_cacheinfo ci
;
4855 ci
.cstamp
= cstamp_delta(cstamp
);
4856 ci
.tstamp
= cstamp_delta(tstamp
);
4857 ci
.ifa_prefered
= preferred
;
4858 ci
.ifa_valid
= valid
;
4860 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
4863 static inline int rt_scope(int ifa_scope
)
4865 if (ifa_scope
& IFA_HOST
)
4866 return RT_SCOPE_HOST
;
4867 else if (ifa_scope
& IFA_LINK
)
4868 return RT_SCOPE_LINK
;
4869 else if (ifa_scope
& IFA_SITE
)
4870 return RT_SCOPE_SITE
;
4872 return RT_SCOPE_UNIVERSE
;
4875 static inline int inet6_ifaddr_msgsize(void)
4877 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
4878 + nla_total_size(16) /* IFA_LOCAL */
4879 + nla_total_size(16) /* IFA_ADDRESS */
4880 + nla_total_size(sizeof(struct ifa_cacheinfo
))
4881 + nla_total_size(4) /* IFA_FLAGS */
4882 + nla_total_size(4) /* IFA_RT_PRIORITY */;
4891 struct inet6_fill_args
{
4898 enum addr_type_t type
;
4901 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
4902 struct inet6_fill_args
*args
)
4904 struct nlmsghdr
*nlh
;
4905 u32 preferred
, valid
;
4907 nlh
= nlmsg_put(skb
, args
->portid
, args
->seq
, args
->event
,
4908 sizeof(struct ifaddrmsg
), args
->flags
);
4912 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
4913 ifa
->idev
->dev
->ifindex
);
4915 if (args
->netnsid
>= 0 &&
4916 nla_put_s32(skb
, IFA_TARGET_NETNSID
, args
->netnsid
))
4919 if (!((ifa
->flags
&IFA_F_PERMANENT
) &&
4920 (ifa
->prefered_lft
== INFINITY_LIFE_TIME
))) {
4921 preferred
= ifa
->prefered_lft
;
4922 valid
= ifa
->valid_lft
;
4923 if (preferred
!= INFINITY_LIFE_TIME
) {
4924 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
4925 if (preferred
> tval
)
4929 if (valid
!= INFINITY_LIFE_TIME
) {
4937 preferred
= INFINITY_LIFE_TIME
;
4938 valid
= INFINITY_LIFE_TIME
;
4941 if (!ipv6_addr_any(&ifa
->peer_addr
)) {
4942 if (nla_put_in6_addr(skb
, IFA_LOCAL
, &ifa
->addr
) < 0 ||
4943 nla_put_in6_addr(skb
, IFA_ADDRESS
, &ifa
->peer_addr
) < 0)
4946 if (nla_put_in6_addr(skb
, IFA_ADDRESS
, &ifa
->addr
) < 0)
4949 if (ifa
->rt_priority
&&
4950 nla_put_u32(skb
, IFA_RT_PRIORITY
, ifa
->rt_priority
))
4953 if (put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0)
4956 if (nla_put_u32(skb
, IFA_FLAGS
, ifa
->flags
) < 0)
4959 nlmsg_end(skb
, nlh
);
4963 nlmsg_cancel(skb
, nlh
);
4967 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
4968 struct inet6_fill_args
*args
)
4970 struct nlmsghdr
*nlh
;
4971 u8 scope
= RT_SCOPE_UNIVERSE
;
4972 int ifindex
= ifmca
->idev
->dev
->ifindex
;
4974 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
4975 scope
= RT_SCOPE_SITE
;
4977 nlh
= nlmsg_put(skb
, args
->portid
, args
->seq
, args
->event
,
4978 sizeof(struct ifaddrmsg
), args
->flags
);
4982 if (args
->netnsid
>= 0 &&
4983 nla_put_s32(skb
, IFA_TARGET_NETNSID
, args
->netnsid
))
4986 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
4987 if (nla_put_in6_addr(skb
, IFA_MULTICAST
, &ifmca
->mca_addr
) < 0 ||
4988 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
4989 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
4990 nlmsg_cancel(skb
, nlh
);
4994 nlmsg_end(skb
, nlh
);
4998 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
4999 struct inet6_fill_args
*args
)
5001 struct net_device
*dev
= fib6_info_nh_dev(ifaca
->aca_rt
);
5002 int ifindex
= dev
? dev
->ifindex
: 1;
5003 struct nlmsghdr
*nlh
;
5004 u8 scope
= RT_SCOPE_UNIVERSE
;
5006 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
5007 scope
= RT_SCOPE_SITE
;
5009 nlh
= nlmsg_put(skb
, args
->portid
, args
->seq
, args
->event
,
5010 sizeof(struct ifaddrmsg
), args
->flags
);
5014 if (args
->netnsid
>= 0 &&
5015 nla_put_s32(skb
, IFA_TARGET_NETNSID
, args
->netnsid
))
5018 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
5019 if (nla_put_in6_addr(skb
, IFA_ANYCAST
, &ifaca
->aca_addr
) < 0 ||
5020 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
5021 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
5022 nlmsg_cancel(skb
, nlh
);
5026 nlmsg_end(skb
, nlh
);
5030 /* called with rcu_read_lock() */
5031 static int in6_dump_addrs(struct inet6_dev
*idev
, struct sk_buff
*skb
,
5032 struct netlink_callback
*cb
, int s_ip_idx
,
5033 struct inet6_fill_args
*fillargs
)
5035 struct ifmcaddr6
*ifmca
;
5036 struct ifacaddr6
*ifaca
;
5040 read_lock_bh(&idev
->lock
);
5041 switch (fillargs
->type
) {
5042 case UNICAST_ADDR
: {
5043 struct inet6_ifaddr
*ifa
;
5044 fillargs
->event
= RTM_NEWADDR
;
5046 /* unicast address incl. temp addr */
5047 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
5048 if (ip_idx
< s_ip_idx
)
5050 err
= inet6_fill_ifaddr(skb
, ifa
, fillargs
);
5053 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
5059 case MULTICAST_ADDR
:
5060 fillargs
->event
= RTM_GETMULTICAST
;
5062 /* multicast address */
5063 for (ifmca
= idev
->mc_list
; ifmca
;
5064 ifmca
= ifmca
->next
, ip_idx
++) {
5065 if (ip_idx
< s_ip_idx
)
5067 err
= inet6_fill_ifmcaddr(skb
, ifmca
, fillargs
);
5073 fillargs
->event
= RTM_GETANYCAST
;
5074 /* anycast address */
5075 for (ifaca
= idev
->ac_list
; ifaca
;
5076 ifaca
= ifaca
->aca_next
, ip_idx
++) {
5077 if (ip_idx
< s_ip_idx
)
5079 err
= inet6_fill_ifacaddr(skb
, ifaca
, fillargs
);
5087 read_unlock_bh(&idev
->lock
);
5088 cb
->args
[2] = ip_idx
;
5092 static int inet6_valid_dump_ifaddr_req(const struct nlmsghdr
*nlh
,
5093 struct inet6_fill_args
*fillargs
,
5094 struct net
**tgt_net
, struct sock
*sk
,
5095 struct netlink_callback
*cb
)
5097 struct netlink_ext_ack
*extack
= cb
->extack
;
5098 struct nlattr
*tb
[IFA_MAX
+1];
5099 struct ifaddrmsg
*ifm
;
5102 if (nlh
->nlmsg_len
< nlmsg_msg_size(sizeof(*ifm
))) {
5103 NL_SET_ERR_MSG_MOD(extack
, "Invalid header for address dump request");
5107 ifm
= nlmsg_data(nlh
);
5108 if (ifm
->ifa_prefixlen
|| ifm
->ifa_flags
|| ifm
->ifa_scope
) {
5109 NL_SET_ERR_MSG_MOD(extack
, "Invalid values in header for address dump request");
5113 fillargs
->ifindex
= ifm
->ifa_index
;
5114 if (fillargs
->ifindex
) {
5115 cb
->answer_flags
|= NLM_F_DUMP_FILTERED
;
5116 fillargs
->flags
|= NLM_F_DUMP_FILTERED
;
5119 err
= nlmsg_parse_deprecated_strict(nlh
, sizeof(*ifm
), tb
, IFA_MAX
,
5120 ifa_ipv6_policy
, extack
);
5124 for (i
= 0; i
<= IFA_MAX
; ++i
) {
5128 if (i
== IFA_TARGET_NETNSID
) {
5131 fillargs
->netnsid
= nla_get_s32(tb
[i
]);
5132 net
= rtnl_get_net_ns_capable(sk
, fillargs
->netnsid
);
5134 fillargs
->netnsid
= -1;
5135 NL_SET_ERR_MSG_MOD(extack
, "Invalid target network namespace id");
5136 return PTR_ERR(net
);
5140 NL_SET_ERR_MSG_MOD(extack
, "Unsupported attribute in dump request");
5148 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
5149 enum addr_type_t type
)
5151 const struct nlmsghdr
*nlh
= cb
->nlh
;
5152 struct inet6_fill_args fillargs
= {
5153 .portid
= NETLINK_CB(cb
->skb
).portid
,
5154 .seq
= cb
->nlh
->nlmsg_seq
,
5155 .flags
= NLM_F_MULTI
,
5159 struct net
*net
= sock_net(skb
->sk
);
5160 struct net
*tgt_net
= net
;
5161 int idx
, s_idx
, s_ip_idx
;
5163 struct net_device
*dev
;
5164 struct inet6_dev
*idev
;
5165 struct hlist_head
*head
;
5169 s_idx
= idx
= cb
->args
[1];
5170 s_ip_idx
= cb
->args
[2];
5172 if (cb
->strict_check
) {
5173 err
= inet6_valid_dump_ifaddr_req(nlh
, &fillargs
, &tgt_net
,
5179 if (fillargs
.ifindex
) {
5180 dev
= __dev_get_by_index(tgt_net
, fillargs
.ifindex
);
5185 idev
= __in6_dev_get(dev
);
5187 err
= in6_dump_addrs(idev
, skb
, cb
, s_ip_idx
,
5197 cb
->seq
= atomic_read(&tgt_net
->ipv6
.dev_addr_genid
) ^ tgt_net
->dev_base_seq
;
5198 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
5200 head
= &tgt_net
->dev_index_head
[h
];
5201 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
5204 if (h
> s_h
|| idx
> s_idx
)
5206 idev
= __in6_dev_get(dev
);
5210 if (in6_dump_addrs(idev
, skb
, cb
, s_ip_idx
,
5222 if (fillargs
.netnsid
>= 0)
5225 return skb
->len
? : err
;
5228 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
5230 enum addr_type_t type
= UNICAST_ADDR
;
5232 return inet6_dump_addr(skb
, cb
, type
);
5235 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
5237 enum addr_type_t type
= MULTICAST_ADDR
;
5239 return inet6_dump_addr(skb
, cb
, type
);
5243 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
5245 enum addr_type_t type
= ANYCAST_ADDR
;
5247 return inet6_dump_addr(skb
, cb
, type
);
5250 static int inet6_rtm_valid_getaddr_req(struct sk_buff
*skb
,
5251 const struct nlmsghdr
*nlh
,
5253 struct netlink_ext_ack
*extack
)
5255 struct ifaddrmsg
*ifm
;
5258 if (nlh
->nlmsg_len
< nlmsg_msg_size(sizeof(*ifm
))) {
5259 NL_SET_ERR_MSG_MOD(extack
, "Invalid header for get address request");
5263 if (!netlink_strict_get_check(skb
))
5264 return nlmsg_parse_deprecated(nlh
, sizeof(*ifm
), tb
, IFA_MAX
,
5265 ifa_ipv6_policy
, extack
);
5267 ifm
= nlmsg_data(nlh
);
5268 if (ifm
->ifa_prefixlen
|| ifm
->ifa_flags
|| ifm
->ifa_scope
) {
5269 NL_SET_ERR_MSG_MOD(extack
, "Invalid values in header for get address request");
5273 err
= nlmsg_parse_deprecated_strict(nlh
, sizeof(*ifm
), tb
, IFA_MAX
,
5274 ifa_ipv6_policy
, extack
);
5278 for (i
= 0; i
<= IFA_MAX
; i
++) {
5283 case IFA_TARGET_NETNSID
:
5288 NL_SET_ERR_MSG_MOD(extack
, "Unsupported attribute in get address request");
5296 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
*nlh
,
5297 struct netlink_ext_ack
*extack
)
5299 struct net
*net
= sock_net(in_skb
->sk
);
5300 struct inet6_fill_args fillargs
= {
5301 .portid
= NETLINK_CB(in_skb
).portid
,
5302 .seq
= nlh
->nlmsg_seq
,
5303 .event
= RTM_NEWADDR
,
5307 struct net
*tgt_net
= net
;
5308 struct ifaddrmsg
*ifm
;
5309 struct nlattr
*tb
[IFA_MAX
+1];
5310 struct in6_addr
*addr
= NULL
, *peer
;
5311 struct net_device
*dev
= NULL
;
5312 struct inet6_ifaddr
*ifa
;
5313 struct sk_buff
*skb
;
5316 err
= inet6_rtm_valid_getaddr_req(in_skb
, nlh
, tb
, extack
);
5320 if (tb
[IFA_TARGET_NETNSID
]) {
5321 fillargs
.netnsid
= nla_get_s32(tb
[IFA_TARGET_NETNSID
]);
5323 tgt_net
= rtnl_get_net_ns_capable(NETLINK_CB(in_skb
).sk
,
5325 if (IS_ERR(tgt_net
))
5326 return PTR_ERR(tgt_net
);
5329 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer
);
5333 ifm
= nlmsg_data(nlh
);
5335 dev
= dev_get_by_index(tgt_net
, ifm
->ifa_index
);
5337 ifa
= ipv6_get_ifaddr(tgt_net
, addr
, dev
, 1);
5339 err
= -EADDRNOTAVAIL
;
5343 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
);
5349 err
= inet6_fill_ifaddr(skb
, ifa
, &fillargs
);
5351 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
5352 WARN_ON(err
== -EMSGSIZE
);
5356 err
= rtnl_unicast(skb
, tgt_net
, NETLINK_CB(in_skb
).portid
);
5362 if (fillargs
.netnsid
>= 0)
5368 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
5370 struct sk_buff
*skb
;
5371 struct net
*net
= dev_net(ifa
->idev
->dev
);
5372 struct inet6_fill_args fillargs
= {
5381 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
5385 err
= inet6_fill_ifaddr(skb
, ifa
, &fillargs
);
5387 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
5388 WARN_ON(err
== -EMSGSIZE
);
5392 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
5396 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
5399 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
5400 __s32
*array
, int bytes
)
5402 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
5404 memset(array
, 0, bytes
);
5405 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
5406 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
5407 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
5408 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
5409 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
5410 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
5411 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
5412 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
5413 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] =
5414 jiffies_to_msecs(cnf
->rtr_solicit_interval
);
5415 array
[DEVCONF_RTR_SOLICIT_MAX_INTERVAL
] =
5416 jiffies_to_msecs(cnf
->rtr_solicit_max_interval
);
5417 array
[DEVCONF_RTR_SOLICIT_DELAY
] =
5418 jiffies_to_msecs(cnf
->rtr_solicit_delay
);
5419 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
5420 array
[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL
] =
5421 jiffies_to_msecs(cnf
->mldv1_unsolicited_report_interval
);
5422 array
[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL
] =
5423 jiffies_to_msecs(cnf
->mldv2_unsolicited_report_interval
);
5424 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
5425 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
5426 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
5427 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
5428 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
5429 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
5430 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
5431 array
[DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT
] = cnf
->accept_ra_min_hop_limit
;
5432 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
5433 #ifdef CONFIG_IPV6_ROUTER_PREF
5434 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
5435 array
[DEVCONF_RTR_PROBE_INTERVAL
] =
5436 jiffies_to_msecs(cnf
->rtr_probe_interval
);
5437 #ifdef CONFIG_IPV6_ROUTE_INFO
5438 array
[DEVCONF_ACCEPT_RA_RT_INFO_MIN_PLEN
] = cnf
->accept_ra_rt_info_min_plen
;
5439 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
5442 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
5443 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
5444 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
5445 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
5446 array
[DEVCONF_USE_OPTIMISTIC
] = cnf
->use_optimistic
;
5448 #ifdef CONFIG_IPV6_MROUTE
5449 array
[DEVCONF_MC_FORWARDING
] = cnf
->mc_forwarding
;
5451 array
[DEVCONF_DISABLE_IPV6
] = cnf
->disable_ipv6
;
5452 array
[DEVCONF_ACCEPT_DAD
] = cnf
->accept_dad
;
5453 array
[DEVCONF_FORCE_TLLAO
] = cnf
->force_tllao
;
5454 array
[DEVCONF_NDISC_NOTIFY
] = cnf
->ndisc_notify
;
5455 array
[DEVCONF_SUPPRESS_FRAG_NDISC
] = cnf
->suppress_frag_ndisc
;
5456 array
[DEVCONF_ACCEPT_RA_FROM_LOCAL
] = cnf
->accept_ra_from_local
;
5457 array
[DEVCONF_ACCEPT_RA_MTU
] = cnf
->accept_ra_mtu
;
5458 array
[DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN
] = cnf
->ignore_routes_with_linkdown
;
5459 /* we omit DEVCONF_STABLE_SECRET for now */
5460 array
[DEVCONF_USE_OIF_ADDRS_ONLY
] = cnf
->use_oif_addrs_only
;
5461 array
[DEVCONF_DROP_UNICAST_IN_L2_MULTICAST
] = cnf
->drop_unicast_in_l2_multicast
;
5462 array
[DEVCONF_DROP_UNSOLICITED_NA
] = cnf
->drop_unsolicited_na
;
5463 array
[DEVCONF_KEEP_ADDR_ON_DOWN
] = cnf
->keep_addr_on_down
;
5464 array
[DEVCONF_SEG6_ENABLED
] = cnf
->seg6_enabled
;
5465 #ifdef CONFIG_IPV6_SEG6_HMAC
5466 array
[DEVCONF_SEG6_REQUIRE_HMAC
] = cnf
->seg6_require_hmac
;
5468 array
[DEVCONF_ENHANCED_DAD
] = cnf
->enhanced_dad
;
5469 array
[DEVCONF_ADDR_GEN_MODE
] = cnf
->addr_gen_mode
;
5470 array
[DEVCONF_DISABLE_POLICY
] = cnf
->disable_policy
;
5471 array
[DEVCONF_NDISC_TCLASS
] = cnf
->ndisc_tclass
;
5474 static inline size_t inet6_ifla6_size(void)
5476 return nla_total_size(4) /* IFLA_INET6_FLAGS */
5477 + nla_total_size(sizeof(struct ifla_cacheinfo
))
5478 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
5479 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
5480 + nla_total_size(ICMP6_MIB_MAX
* 8) /* IFLA_INET6_ICMP6STATS */
5481 + nla_total_size(sizeof(struct in6_addr
)) /* IFLA_INET6_TOKEN */
5482 + nla_total_size(1) /* IFLA_INET6_ADDR_GEN_MODE */
5486 static inline size_t inet6_if_nlmsg_size(void)
5488 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
5489 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
5490 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
5491 + nla_total_size(4) /* IFLA_MTU */
5492 + nla_total_size(4) /* IFLA_LINK */
5493 + nla_total_size(1) /* IFLA_OPERSTATE */
5494 + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
5497 static inline void __snmp6_fill_statsdev(u64
*stats
, atomic_long_t
*mib
,
5501 int pad
= bytes
- sizeof(u64
) * ICMP6_MIB_MAX
;
5504 /* Use put_unaligned() because stats may not be aligned for u64. */
5505 put_unaligned(ICMP6_MIB_MAX
, &stats
[0]);
5506 for (i
= 1; i
< ICMP6_MIB_MAX
; i
++)
5507 put_unaligned(atomic_long_read(&mib
[i
]), &stats
[i
]);
5509 memset(&stats
[ICMP6_MIB_MAX
], 0, pad
);
5512 static inline void __snmp6_fill_stats64(u64
*stats
, void __percpu
*mib
,
5513 int bytes
, size_t syncpoff
)
5516 u64 buff
[IPSTATS_MIB_MAX
];
5517 int pad
= bytes
- sizeof(u64
) * IPSTATS_MIB_MAX
;
5521 memset(buff
, 0, sizeof(buff
));
5522 buff
[0] = IPSTATS_MIB_MAX
;
5524 for_each_possible_cpu(c
) {
5525 for (i
= 1; i
< IPSTATS_MIB_MAX
; i
++)
5526 buff
[i
] += snmp_get_cpu_field64(mib
, c
, i
, syncpoff
);
5529 memcpy(stats
, buff
, IPSTATS_MIB_MAX
* sizeof(u64
));
5530 memset(&stats
[IPSTATS_MIB_MAX
], 0, pad
);
5533 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
5537 case IFLA_INET6_STATS
:
5538 __snmp6_fill_stats64(stats
, idev
->stats
.ipv6
, bytes
,
5539 offsetof(struct ipstats_mib
, syncp
));
5541 case IFLA_INET6_ICMP6STATS
:
5542 __snmp6_fill_statsdev(stats
, idev
->stats
.icmpv6dev
->mibs
, bytes
);
5547 static int inet6_fill_ifla6_attrs(struct sk_buff
*skb
, struct inet6_dev
*idev
,
5548 u32 ext_filter_mask
)
5551 struct ifla_cacheinfo ci
;
5553 if (nla_put_u32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
))
5554 goto nla_put_failure
;
5555 ci
.max_reasm_len
= IPV6_MAXPLEN
;
5556 ci
.tstamp
= cstamp_delta(idev
->tstamp
);
5557 ci
.reachable_time
= jiffies_to_msecs(idev
->nd_parms
->reachable_time
);
5558 ci
.retrans_time
= jiffies_to_msecs(NEIGH_VAR(idev
->nd_parms
, RETRANS_TIME
));
5559 if (nla_put(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
))
5560 goto nla_put_failure
;
5561 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
5563 goto nla_put_failure
;
5564 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
5566 /* XXX - MC not implemented */
5568 if (ext_filter_mask
& RTEXT_FILTER_SKIP_STATS
)
5571 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
5573 goto nla_put_failure
;
5574 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
5576 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
5578 goto nla_put_failure
;
5579 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
5581 nla
= nla_reserve(skb
, IFLA_INET6_TOKEN
, sizeof(struct in6_addr
));
5583 goto nla_put_failure
;
5584 read_lock_bh(&idev
->lock
);
5585 memcpy(nla_data(nla
), idev
->token
.s6_addr
, nla_len(nla
));
5586 read_unlock_bh(&idev
->lock
);
5588 if (nla_put_u8(skb
, IFLA_INET6_ADDR_GEN_MODE
, idev
->cnf
.addr_gen_mode
))
5589 goto nla_put_failure
;
5597 static size_t inet6_get_link_af_size(const struct net_device
*dev
,
5598 u32 ext_filter_mask
)
5600 if (!__in6_dev_get(dev
))
5603 return inet6_ifla6_size();
5606 static int inet6_fill_link_af(struct sk_buff
*skb
, const struct net_device
*dev
,
5607 u32 ext_filter_mask
)
5609 struct inet6_dev
*idev
= __in6_dev_get(dev
);
5614 if (inet6_fill_ifla6_attrs(skb
, idev
, ext_filter_mask
) < 0)
5620 static int inet6_set_iftoken(struct inet6_dev
*idev
, struct in6_addr
*token
)
5622 struct inet6_ifaddr
*ifp
;
5623 struct net_device
*dev
= idev
->dev
;
5624 bool clear_token
, update_rs
= false;
5625 struct in6_addr ll_addr
;
5631 if (dev
->flags
& (IFF_LOOPBACK
| IFF_NOARP
))
5633 if (!ipv6_accept_ra(idev
))
5635 if (idev
->cnf
.rtr_solicits
== 0)
5638 write_lock_bh(&idev
->lock
);
5640 BUILD_BUG_ON(sizeof(token
->s6_addr
) != 16);
5641 memcpy(idev
->token
.s6_addr
+ 8, token
->s6_addr
+ 8, 8);
5643 write_unlock_bh(&idev
->lock
);
5645 clear_token
= ipv6_addr_any(token
);
5649 if (!idev
->dead
&& (idev
->if_flags
& IF_READY
) &&
5650 !ipv6_get_lladdr(dev
, &ll_addr
, IFA_F_TENTATIVE
|
5651 IFA_F_OPTIMISTIC
)) {
5652 /* If we're not ready, then normal ifup will take care
5653 * of this. Otherwise, we need to request our rs here.
5655 ndisc_send_rs(dev
, &ll_addr
, &in6addr_linklocal_allrouters
);
5660 write_lock_bh(&idev
->lock
);
5663 idev
->if_flags
|= IF_RS_SENT
;
5664 idev
->rs_interval
= rfc3315_s14_backoff_init(
5665 idev
->cnf
.rtr_solicit_interval
);
5666 idev
->rs_probes
= 1;
5667 addrconf_mod_rs_timer(idev
, idev
->rs_interval
);
5670 /* Well, that's kinda nasty ... */
5671 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
5672 spin_lock(&ifp
->lock
);
5673 if (ifp
->tokenized
) {
5675 ifp
->prefered_lft
= 0;
5677 spin_unlock(&ifp
->lock
);
5680 write_unlock_bh(&idev
->lock
);
5681 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
5682 addrconf_verify_rtnl();
5686 static const struct nla_policy inet6_af_policy
[IFLA_INET6_MAX
+ 1] = {
5687 [IFLA_INET6_ADDR_GEN_MODE
] = { .type
= NLA_U8
},
5688 [IFLA_INET6_TOKEN
] = { .len
= sizeof(struct in6_addr
) },
5691 static int check_addr_gen_mode(int mode
)
5693 if (mode
!= IN6_ADDR_GEN_MODE_EUI64
&&
5694 mode
!= IN6_ADDR_GEN_MODE_NONE
&&
5695 mode
!= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
&&
5696 mode
!= IN6_ADDR_GEN_MODE_RANDOM
)
5701 static int check_stable_privacy(struct inet6_dev
*idev
, struct net
*net
,
5704 if (mode
== IN6_ADDR_GEN_MODE_STABLE_PRIVACY
&&
5705 !idev
->cnf
.stable_secret
.initialized
&&
5706 !net
->ipv6
.devconf_dflt
->stable_secret
.initialized
)
5711 static int inet6_validate_link_af(const struct net_device
*dev
,
5712 const struct nlattr
*nla
)
5714 struct nlattr
*tb
[IFLA_INET6_MAX
+ 1];
5715 struct inet6_dev
*idev
= NULL
;
5719 idev
= __in6_dev_get(dev
);
5721 return -EAFNOSUPPORT
;
5724 err
= nla_parse_nested_deprecated(tb
, IFLA_INET6_MAX
, nla
,
5725 inet6_af_policy
, NULL
);
5729 if (!tb
[IFLA_INET6_TOKEN
] && !tb
[IFLA_INET6_ADDR_GEN_MODE
])
5732 if (tb
[IFLA_INET6_ADDR_GEN_MODE
]) {
5733 u8 mode
= nla_get_u8(tb
[IFLA_INET6_ADDR_GEN_MODE
]);
5735 if (check_addr_gen_mode(mode
) < 0)
5737 if (dev
&& check_stable_privacy(idev
, dev_net(dev
), mode
) < 0)
5744 static int inet6_set_link_af(struct net_device
*dev
, const struct nlattr
*nla
)
5746 struct inet6_dev
*idev
= __in6_dev_get(dev
);
5747 struct nlattr
*tb
[IFLA_INET6_MAX
+ 1];
5751 return -EAFNOSUPPORT
;
5753 if (nla_parse_nested_deprecated(tb
, IFLA_INET6_MAX
, nla
, NULL
, NULL
) < 0)
5756 if (tb
[IFLA_INET6_TOKEN
]) {
5757 err
= inet6_set_iftoken(idev
, nla_data(tb
[IFLA_INET6_TOKEN
]));
5762 if (tb
[IFLA_INET6_ADDR_GEN_MODE
]) {
5763 u8 mode
= nla_get_u8(tb
[IFLA_INET6_ADDR_GEN_MODE
]);
5765 idev
->cnf
.addr_gen_mode
= mode
;
5771 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
5772 u32 portid
, u32 seq
, int event
, unsigned int flags
)
5774 struct net_device
*dev
= idev
->dev
;
5775 struct ifinfomsg
*hdr
;
5776 struct nlmsghdr
*nlh
;
5779 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*hdr
), flags
);
5783 hdr
= nlmsg_data(nlh
);
5784 hdr
->ifi_family
= AF_INET6
;
5786 hdr
->ifi_type
= dev
->type
;
5787 hdr
->ifi_index
= dev
->ifindex
;
5788 hdr
->ifi_flags
= dev_get_flags(dev
);
5789 hdr
->ifi_change
= 0;
5791 if (nla_put_string(skb
, IFLA_IFNAME
, dev
->name
) ||
5793 nla_put(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
)) ||
5794 nla_put_u32(skb
, IFLA_MTU
, dev
->mtu
) ||
5795 (dev
->ifindex
!= dev_get_iflink(dev
) &&
5796 nla_put_u32(skb
, IFLA_LINK
, dev_get_iflink(dev
))) ||
5797 nla_put_u8(skb
, IFLA_OPERSTATE
,
5798 netif_running(dev
) ? dev
->operstate
: IF_OPER_DOWN
))
5799 goto nla_put_failure
;
5800 protoinfo
= nla_nest_start_noflag(skb
, IFLA_PROTINFO
);
5802 goto nla_put_failure
;
5804 if (inet6_fill_ifla6_attrs(skb
, idev
, 0) < 0)
5805 goto nla_put_failure
;
5807 nla_nest_end(skb
, protoinfo
);
5808 nlmsg_end(skb
, nlh
);
5812 nlmsg_cancel(skb
, nlh
);
5816 static int inet6_valid_dump_ifinfo(const struct nlmsghdr
*nlh
,
5817 struct netlink_ext_ack
*extack
)
5819 struct ifinfomsg
*ifm
;
5821 if (nlh
->nlmsg_len
< nlmsg_msg_size(sizeof(*ifm
))) {
5822 NL_SET_ERR_MSG_MOD(extack
, "Invalid header for link dump request");
5826 if (nlmsg_attrlen(nlh
, sizeof(*ifm
))) {
5827 NL_SET_ERR_MSG_MOD(extack
, "Invalid data after header");
5831 ifm
= nlmsg_data(nlh
);
5832 if (ifm
->__ifi_pad
|| ifm
->ifi_type
|| ifm
->ifi_flags
||
5833 ifm
->ifi_change
|| ifm
->ifi_index
) {
5834 NL_SET_ERR_MSG_MOD(extack
, "Invalid values in header for dump request");
5841 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
5843 struct net
*net
= sock_net(skb
->sk
);
5846 struct net_device
*dev
;
5847 struct inet6_dev
*idev
;
5848 struct hlist_head
*head
;
5850 /* only requests using strict checking can pass data to
5851 * influence the dump
5853 if (cb
->strict_check
) {
5854 int err
= inet6_valid_dump_ifinfo(cb
->nlh
, cb
->extack
);
5861 s_idx
= cb
->args
[1];
5864 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
5866 head
= &net
->dev_index_head
[h
];
5867 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
5870 idev
= __in6_dev_get(dev
);
5873 if (inet6_fill_ifinfo(skb
, idev
,
5874 NETLINK_CB(cb
->skb
).portid
,
5876 RTM_NEWLINK
, NLM_F_MULTI
) < 0)
5890 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
5892 struct sk_buff
*skb
;
5893 struct net
*net
= dev_net(idev
->dev
);
5896 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
5900 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
5902 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
5903 WARN_ON(err
== -EMSGSIZE
);
5907 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFINFO
, NULL
, GFP_ATOMIC
);
5911 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFINFO
, err
);
5914 static inline size_t inet6_prefix_nlmsg_size(void)
5916 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
5917 + nla_total_size(sizeof(struct in6_addr
))
5918 + nla_total_size(sizeof(struct prefix_cacheinfo
));
5921 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
5922 struct prefix_info
*pinfo
, u32 portid
, u32 seq
,
5923 int event
, unsigned int flags
)
5925 struct prefixmsg
*pmsg
;
5926 struct nlmsghdr
*nlh
;
5927 struct prefix_cacheinfo ci
;
5929 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*pmsg
), flags
);
5933 pmsg
= nlmsg_data(nlh
);
5934 pmsg
->prefix_family
= AF_INET6
;
5935 pmsg
->prefix_pad1
= 0;
5936 pmsg
->prefix_pad2
= 0;
5937 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
5938 pmsg
->prefix_len
= pinfo
->prefix_len
;
5939 pmsg
->prefix_type
= pinfo
->type
;
5940 pmsg
->prefix_pad3
= 0;
5941 pmsg
->prefix_flags
= 0;
5943 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
5944 if (pinfo
->autoconf
)
5945 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
5947 if (nla_put(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
))
5948 goto nla_put_failure
;
5949 ci
.preferred_time
= ntohl(pinfo
->prefered
);
5950 ci
.valid_time
= ntohl(pinfo
->valid
);
5951 if (nla_put(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
))
5952 goto nla_put_failure
;
5953 nlmsg_end(skb
, nlh
);
5957 nlmsg_cancel(skb
, nlh
);
5961 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
5962 struct prefix_info
*pinfo
)
5964 struct sk_buff
*skb
;
5965 struct net
*net
= dev_net(idev
->dev
);
5968 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
5972 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
5974 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
5975 WARN_ON(err
== -EMSGSIZE
);
5979 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
5983 rtnl_set_sk_err(net
, RTNLGRP_IPV6_PREFIX
, err
);
5986 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
5988 struct net
*net
= dev_net(ifp
->idev
->dev
);
5993 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
5998 * If the address was optimistic we inserted the route at the
5999 * start of our DAD process, so we don't need to do it again.
6000 * If the device was taken down in the middle of the DAD
6001 * cycle there is a race where we could get here without a
6002 * host route, so nothing to insert. That will be fixed when
6003 * the device is brought up.
6005 if (ifp
->rt
&& !rcu_access_pointer(ifp
->rt
->fib6_node
)) {
6006 ip6_ins_rt(net
, ifp
->rt
);
6007 } else if (!ifp
->rt
&& (ifp
->idev
->dev
->flags
& IFF_UP
)) {
6008 pr_warn("BUG: Address %pI6c on device %s is missing its host route.\n",
6009 &ifp
->addr
, ifp
->idev
->dev
->name
);
6012 if (ifp
->idev
->cnf
.forwarding
)
6013 addrconf_join_anycast(ifp
);
6014 if (!ipv6_addr_any(&ifp
->peer_addr
))
6015 addrconf_prefix_route(&ifp
->peer_addr
, 128,
6016 ifp
->rt_priority
, ifp
->idev
->dev
,
6020 if (ifp
->idev
->cnf
.forwarding
)
6021 addrconf_leave_anycast(ifp
);
6022 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
6023 if (!ipv6_addr_any(&ifp
->peer_addr
)) {
6024 struct fib6_info
*rt
;
6026 rt
= addrconf_get_prefix_route(&ifp
->peer_addr
, 128,
6027 ifp
->idev
->dev
, 0, 0,
6030 ip6_del_rt(net
, rt
);
6033 ip6_del_rt(net
, ifp
->rt
);
6036 rt_genid_bump_ipv6(net
);
6039 atomic_inc(&net
->ipv6
.dev_addr_genid
);
6042 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
6045 if (likely(ifp
->idev
->dead
== 0))
6046 __ipv6_ifa_notify(event
, ifp
);
6047 rcu_read_unlock_bh();
6050 #ifdef CONFIG_SYSCTL
6053 int addrconf_sysctl_forward(struct ctl_table
*ctl
, int write
,
6054 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
6056 int *valp
= ctl
->data
;
6059 struct ctl_table lctl
;
6063 * ctl->data points to idev->cnf.forwarding, we should
6064 * not modify it until we get the rtnl lock.
6069 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
6072 ret
= addrconf_fixup_forwarding(ctl
, valp
, val
);
6079 int addrconf_sysctl_mtu(struct ctl_table
*ctl
, int write
,
6080 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
6082 struct inet6_dev
*idev
= ctl
->extra1
;
6083 int min_mtu
= IPV6_MIN_MTU
;
6084 struct ctl_table lctl
;
6087 lctl
.extra1
= &min_mtu
;
6088 lctl
.extra2
= idev
? &idev
->dev
->mtu
: NULL
;
6090 return proc_dointvec_minmax(&lctl
, write
, buffer
, lenp
, ppos
);
6093 static void dev_disable_change(struct inet6_dev
*idev
)
6095 struct netdev_notifier_info info
;
6097 if (!idev
|| !idev
->dev
)
6100 netdev_notifier_info_init(&info
, idev
->dev
);
6101 if (idev
->cnf
.disable_ipv6
)
6102 addrconf_notify(NULL
, NETDEV_DOWN
, &info
);
6104 addrconf_notify(NULL
, NETDEV_UP
, &info
);
6107 static void addrconf_disable_change(struct net
*net
, __s32 newf
)
6109 struct net_device
*dev
;
6110 struct inet6_dev
*idev
;
6112 for_each_netdev(net
, dev
) {
6113 idev
= __in6_dev_get(dev
);
6115 int changed
= (!idev
->cnf
.disable_ipv6
) ^ (!newf
);
6116 idev
->cnf
.disable_ipv6
= newf
;
6118 dev_disable_change(idev
);
6123 static int addrconf_disable_ipv6(struct ctl_table
*table
, int *p
, int newf
)
6128 if (!rtnl_trylock())
6129 return restart_syscall();
6131 net
= (struct net
*)table
->extra2
;
6135 if (p
== &net
->ipv6
.devconf_dflt
->disable_ipv6
) {
6140 if (p
== &net
->ipv6
.devconf_all
->disable_ipv6
) {
6141 net
->ipv6
.devconf_dflt
->disable_ipv6
= newf
;
6142 addrconf_disable_change(net
, newf
);
6143 } else if ((!newf
) ^ (!old
))
6144 dev_disable_change((struct inet6_dev
*)table
->extra1
);
6151 int addrconf_sysctl_disable(struct ctl_table
*ctl
, int write
,
6152 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
6154 int *valp
= ctl
->data
;
6157 struct ctl_table lctl
;
6161 * ctl->data points to idev->cnf.disable_ipv6, we should
6162 * not modify it until we get the rtnl lock.
6167 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
6170 ret
= addrconf_disable_ipv6(ctl
, valp
, val
);
6177 int addrconf_sysctl_proxy_ndp(struct ctl_table
*ctl
, int write
,
6178 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
6180 int *valp
= ctl
->data
;
6185 ret
= proc_dointvec(ctl
, write
, buffer
, lenp
, ppos
);
6188 if (write
&& old
!= new) {
6189 struct net
*net
= ctl
->extra2
;
6191 if (!rtnl_trylock())
6192 return restart_syscall();
6194 if (valp
== &net
->ipv6
.devconf_dflt
->proxy_ndp
)
6195 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
6196 NETCONFA_PROXY_NEIGH
,
6197 NETCONFA_IFINDEX_DEFAULT
,
6198 net
->ipv6
.devconf_dflt
);
6199 else if (valp
== &net
->ipv6
.devconf_all
->proxy_ndp
)
6200 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
6201 NETCONFA_PROXY_NEIGH
,
6202 NETCONFA_IFINDEX_ALL
,
6203 net
->ipv6
.devconf_all
);
6205 struct inet6_dev
*idev
= ctl
->extra1
;
6207 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
6208 NETCONFA_PROXY_NEIGH
,
6218 static int addrconf_sysctl_addr_gen_mode(struct ctl_table
*ctl
, int write
,
6219 void __user
*buffer
, size_t *lenp
,
6224 struct inet6_dev
*idev
= (struct inet6_dev
*)ctl
->extra1
;
6225 struct net
*net
= (struct net
*)ctl
->extra2
;
6226 struct ctl_table tmp
= {
6228 .maxlen
= sizeof(new_val
),
6232 if (!rtnl_trylock())
6233 return restart_syscall();
6235 new_val
= *((u32
*)ctl
->data
);
6237 ret
= proc_douintvec(&tmp
, write
, buffer
, lenp
, ppos
);
6242 if (check_addr_gen_mode(new_val
) < 0) {
6248 if (check_stable_privacy(idev
, net
, new_val
) < 0) {
6253 if (idev
->cnf
.addr_gen_mode
!= new_val
) {
6254 idev
->cnf
.addr_gen_mode
= new_val
;
6255 addrconf_dev_config(idev
->dev
);
6257 } else if (&net
->ipv6
.devconf_all
->addr_gen_mode
== ctl
->data
) {
6258 struct net_device
*dev
;
6260 net
->ipv6
.devconf_dflt
->addr_gen_mode
= new_val
;
6261 for_each_netdev(net
, dev
) {
6262 idev
= __in6_dev_get(dev
);
6264 idev
->cnf
.addr_gen_mode
!= new_val
) {
6265 idev
->cnf
.addr_gen_mode
= new_val
;
6266 addrconf_dev_config(idev
->dev
);
6271 *((u32
*)ctl
->data
) = new_val
;
6280 static int addrconf_sysctl_stable_secret(struct ctl_table
*ctl
, int write
,
6281 void __user
*buffer
, size_t *lenp
,
6285 struct in6_addr addr
;
6286 char str
[IPV6_MAX_STRLEN
];
6287 struct ctl_table lctl
= *ctl
;
6288 struct net
*net
= ctl
->extra2
;
6289 struct ipv6_stable_secret
*secret
= ctl
->data
;
6291 if (&net
->ipv6
.devconf_all
->stable_secret
== ctl
->data
)
6294 lctl
.maxlen
= IPV6_MAX_STRLEN
;
6297 if (!rtnl_trylock())
6298 return restart_syscall();
6300 if (!write
&& !secret
->initialized
) {
6305 err
= snprintf(str
, sizeof(str
), "%pI6", &secret
->secret
);
6306 if (err
>= sizeof(str
)) {
6311 err
= proc_dostring(&lctl
, write
, buffer
, lenp
, ppos
);
6315 if (in6_pton(str
, -1, addr
.in6_u
.u6_addr8
, -1, NULL
) != 1) {
6320 secret
->initialized
= true;
6321 secret
->secret
= addr
;
6323 if (&net
->ipv6
.devconf_dflt
->stable_secret
== ctl
->data
) {
6324 struct net_device
*dev
;
6326 for_each_netdev(net
, dev
) {
6327 struct inet6_dev
*idev
= __in6_dev_get(dev
);
6330 idev
->cnf
.addr_gen_mode
=
6331 IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
6335 struct inet6_dev
*idev
= ctl
->extra1
;
6337 idev
->cnf
.addr_gen_mode
= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
6347 int addrconf_sysctl_ignore_routes_with_linkdown(struct ctl_table
*ctl
,
6349 void __user
*buffer
,
6353 int *valp
= ctl
->data
;
6356 struct ctl_table lctl
;
6359 /* ctl->data points to idev->cnf.ignore_routes_when_linkdown
6360 * we should not modify it until we get the rtnl lock.
6365 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
6368 ret
= addrconf_fixup_linkdown(ctl
, valp
, val
);
6375 void addrconf_set_nopolicy(struct rt6_info
*rt
, int action
)
6379 rt
->dst
.flags
|= DST_NOPOLICY
;
6381 rt
->dst
.flags
&= ~DST_NOPOLICY
;
6386 void addrconf_disable_policy_idev(struct inet6_dev
*idev
, int val
)
6388 struct inet6_ifaddr
*ifa
;
6390 read_lock_bh(&idev
->lock
);
6391 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
6392 spin_lock(&ifa
->lock
);
6394 /* host routes only use builtin fib6_nh */
6395 struct fib6_nh
*nh
= ifa
->rt
->fib6_nh
;
6399 ifa
->rt
->dst_nopolicy
= val
? true : false;
6400 if (nh
->rt6i_pcpu
) {
6401 for_each_possible_cpu(cpu
) {
6402 struct rt6_info
**rtp
;
6404 rtp
= per_cpu_ptr(nh
->rt6i_pcpu
, cpu
);
6405 addrconf_set_nopolicy(*rtp
, val
);
6410 spin_unlock(&ifa
->lock
);
6412 read_unlock_bh(&idev
->lock
);
6416 int addrconf_disable_policy(struct ctl_table
*ctl
, int *valp
, int val
)
6418 struct inet6_dev
*idev
;
6421 if (!rtnl_trylock())
6422 return restart_syscall();
6426 net
= (struct net
*)ctl
->extra2
;
6427 if (valp
== &net
->ipv6
.devconf_dflt
->disable_policy
) {
6432 if (valp
== &net
->ipv6
.devconf_all
->disable_policy
) {
6433 struct net_device
*dev
;
6435 for_each_netdev(net
, dev
) {
6436 idev
= __in6_dev_get(dev
);
6438 addrconf_disable_policy_idev(idev
, val
);
6441 idev
= (struct inet6_dev
*)ctl
->extra1
;
6442 addrconf_disable_policy_idev(idev
, val
);
6450 int addrconf_sysctl_disable_policy(struct ctl_table
*ctl
, int write
,
6451 void __user
*buffer
, size_t *lenp
,
6454 int *valp
= ctl
->data
;
6457 struct ctl_table lctl
;
6462 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
6464 if (write
&& (*valp
!= val
))
6465 ret
= addrconf_disable_policy(ctl
, valp
, val
);
6473 static int minus_one
= -1;
6474 static const int two_five_five
= 255;
6476 static const struct ctl_table addrconf_sysctl
[] = {
6478 .procname
= "forwarding",
6479 .data
= &ipv6_devconf
.forwarding
,
6480 .maxlen
= sizeof(int),
6482 .proc_handler
= addrconf_sysctl_forward
,
6485 .procname
= "hop_limit",
6486 .data
= &ipv6_devconf
.hop_limit
,
6487 .maxlen
= sizeof(int),
6489 .proc_handler
= proc_dointvec_minmax
,
6490 .extra1
= (void *)SYSCTL_ONE
,
6491 .extra2
= (void *)&two_five_five
,
6495 .data
= &ipv6_devconf
.mtu6
,
6496 .maxlen
= sizeof(int),
6498 .proc_handler
= addrconf_sysctl_mtu
,
6501 .procname
= "accept_ra",
6502 .data
= &ipv6_devconf
.accept_ra
,
6503 .maxlen
= sizeof(int),
6505 .proc_handler
= proc_dointvec
,
6508 .procname
= "accept_redirects",
6509 .data
= &ipv6_devconf
.accept_redirects
,
6510 .maxlen
= sizeof(int),
6512 .proc_handler
= proc_dointvec
,
6515 .procname
= "autoconf",
6516 .data
= &ipv6_devconf
.autoconf
,
6517 .maxlen
= sizeof(int),
6519 .proc_handler
= proc_dointvec
,
6522 .procname
= "dad_transmits",
6523 .data
= &ipv6_devconf
.dad_transmits
,
6524 .maxlen
= sizeof(int),
6526 .proc_handler
= proc_dointvec
,
6529 .procname
= "router_solicitations",
6530 .data
= &ipv6_devconf
.rtr_solicits
,
6531 .maxlen
= sizeof(int),
6533 .proc_handler
= proc_dointvec_minmax
,
6534 .extra1
= &minus_one
,
6537 .procname
= "router_solicitation_interval",
6538 .data
= &ipv6_devconf
.rtr_solicit_interval
,
6539 .maxlen
= sizeof(int),
6541 .proc_handler
= proc_dointvec_jiffies
,
6544 .procname
= "router_solicitation_max_interval",
6545 .data
= &ipv6_devconf
.rtr_solicit_max_interval
,
6546 .maxlen
= sizeof(int),
6548 .proc_handler
= proc_dointvec_jiffies
,
6551 .procname
= "router_solicitation_delay",
6552 .data
= &ipv6_devconf
.rtr_solicit_delay
,
6553 .maxlen
= sizeof(int),
6555 .proc_handler
= proc_dointvec_jiffies
,
6558 .procname
= "force_mld_version",
6559 .data
= &ipv6_devconf
.force_mld_version
,
6560 .maxlen
= sizeof(int),
6562 .proc_handler
= proc_dointvec
,
6565 .procname
= "mldv1_unsolicited_report_interval",
6567 &ipv6_devconf
.mldv1_unsolicited_report_interval
,
6568 .maxlen
= sizeof(int),
6570 .proc_handler
= proc_dointvec_ms_jiffies
,
6573 .procname
= "mldv2_unsolicited_report_interval",
6575 &ipv6_devconf
.mldv2_unsolicited_report_interval
,
6576 .maxlen
= sizeof(int),
6578 .proc_handler
= proc_dointvec_ms_jiffies
,
6581 .procname
= "use_tempaddr",
6582 .data
= &ipv6_devconf
.use_tempaddr
,
6583 .maxlen
= sizeof(int),
6585 .proc_handler
= proc_dointvec
,
6588 .procname
= "temp_valid_lft",
6589 .data
= &ipv6_devconf
.temp_valid_lft
,
6590 .maxlen
= sizeof(int),
6592 .proc_handler
= proc_dointvec
,
6595 .procname
= "temp_prefered_lft",
6596 .data
= &ipv6_devconf
.temp_prefered_lft
,
6597 .maxlen
= sizeof(int),
6599 .proc_handler
= proc_dointvec
,
6602 .procname
= "regen_max_retry",
6603 .data
= &ipv6_devconf
.regen_max_retry
,
6604 .maxlen
= sizeof(int),
6606 .proc_handler
= proc_dointvec
,
6609 .procname
= "max_desync_factor",
6610 .data
= &ipv6_devconf
.max_desync_factor
,
6611 .maxlen
= sizeof(int),
6613 .proc_handler
= proc_dointvec
,
6616 .procname
= "max_addresses",
6617 .data
= &ipv6_devconf
.max_addresses
,
6618 .maxlen
= sizeof(int),
6620 .proc_handler
= proc_dointvec
,
6623 .procname
= "accept_ra_defrtr",
6624 .data
= &ipv6_devconf
.accept_ra_defrtr
,
6625 .maxlen
= sizeof(int),
6627 .proc_handler
= proc_dointvec
,
6630 .procname
= "accept_ra_min_hop_limit",
6631 .data
= &ipv6_devconf
.accept_ra_min_hop_limit
,
6632 .maxlen
= sizeof(int),
6634 .proc_handler
= proc_dointvec
,
6637 .procname
= "accept_ra_pinfo",
6638 .data
= &ipv6_devconf
.accept_ra_pinfo
,
6639 .maxlen
= sizeof(int),
6641 .proc_handler
= proc_dointvec
,
6643 #ifdef CONFIG_IPV6_ROUTER_PREF
6645 .procname
= "accept_ra_rtr_pref",
6646 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
6647 .maxlen
= sizeof(int),
6649 .proc_handler
= proc_dointvec
,
6652 .procname
= "router_probe_interval",
6653 .data
= &ipv6_devconf
.rtr_probe_interval
,
6654 .maxlen
= sizeof(int),
6656 .proc_handler
= proc_dointvec_jiffies
,
6658 #ifdef CONFIG_IPV6_ROUTE_INFO
6660 .procname
= "accept_ra_rt_info_min_plen",
6661 .data
= &ipv6_devconf
.accept_ra_rt_info_min_plen
,
6662 .maxlen
= sizeof(int),
6664 .proc_handler
= proc_dointvec
,
6667 .procname
= "accept_ra_rt_info_max_plen",
6668 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
6669 .maxlen
= sizeof(int),
6671 .proc_handler
= proc_dointvec
,
6676 .procname
= "proxy_ndp",
6677 .data
= &ipv6_devconf
.proxy_ndp
,
6678 .maxlen
= sizeof(int),
6680 .proc_handler
= addrconf_sysctl_proxy_ndp
,
6683 .procname
= "accept_source_route",
6684 .data
= &ipv6_devconf
.accept_source_route
,
6685 .maxlen
= sizeof(int),
6687 .proc_handler
= proc_dointvec
,
6689 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
6691 .procname
= "optimistic_dad",
6692 .data
= &ipv6_devconf
.optimistic_dad
,
6693 .maxlen
= sizeof(int),
6695 .proc_handler
= proc_dointvec
,
6698 .procname
= "use_optimistic",
6699 .data
= &ipv6_devconf
.use_optimistic
,
6700 .maxlen
= sizeof(int),
6702 .proc_handler
= proc_dointvec
,
6705 #ifdef CONFIG_IPV6_MROUTE
6707 .procname
= "mc_forwarding",
6708 .data
= &ipv6_devconf
.mc_forwarding
,
6709 .maxlen
= sizeof(int),
6711 .proc_handler
= proc_dointvec
,
6715 .procname
= "disable_ipv6",
6716 .data
= &ipv6_devconf
.disable_ipv6
,
6717 .maxlen
= sizeof(int),
6719 .proc_handler
= addrconf_sysctl_disable
,
6722 .procname
= "accept_dad",
6723 .data
= &ipv6_devconf
.accept_dad
,
6724 .maxlen
= sizeof(int),
6726 .proc_handler
= proc_dointvec
,
6729 .procname
= "force_tllao",
6730 .data
= &ipv6_devconf
.force_tllao
,
6731 .maxlen
= sizeof(int),
6733 .proc_handler
= proc_dointvec
6736 .procname
= "ndisc_notify",
6737 .data
= &ipv6_devconf
.ndisc_notify
,
6738 .maxlen
= sizeof(int),
6740 .proc_handler
= proc_dointvec
6743 .procname
= "suppress_frag_ndisc",
6744 .data
= &ipv6_devconf
.suppress_frag_ndisc
,
6745 .maxlen
= sizeof(int),
6747 .proc_handler
= proc_dointvec
6750 .procname
= "accept_ra_from_local",
6751 .data
= &ipv6_devconf
.accept_ra_from_local
,
6752 .maxlen
= sizeof(int),
6754 .proc_handler
= proc_dointvec
,
6757 .procname
= "accept_ra_mtu",
6758 .data
= &ipv6_devconf
.accept_ra_mtu
,
6759 .maxlen
= sizeof(int),
6761 .proc_handler
= proc_dointvec
,
6764 .procname
= "stable_secret",
6765 .data
= &ipv6_devconf
.stable_secret
,
6766 .maxlen
= IPV6_MAX_STRLEN
,
6768 .proc_handler
= addrconf_sysctl_stable_secret
,
6771 .procname
= "use_oif_addrs_only",
6772 .data
= &ipv6_devconf
.use_oif_addrs_only
,
6773 .maxlen
= sizeof(int),
6775 .proc_handler
= proc_dointvec
,
6778 .procname
= "ignore_routes_with_linkdown",
6779 .data
= &ipv6_devconf
.ignore_routes_with_linkdown
,
6780 .maxlen
= sizeof(int),
6782 .proc_handler
= addrconf_sysctl_ignore_routes_with_linkdown
,
6785 .procname
= "drop_unicast_in_l2_multicast",
6786 .data
= &ipv6_devconf
.drop_unicast_in_l2_multicast
,
6787 .maxlen
= sizeof(int),
6789 .proc_handler
= proc_dointvec
,
6792 .procname
= "drop_unsolicited_na",
6793 .data
= &ipv6_devconf
.drop_unsolicited_na
,
6794 .maxlen
= sizeof(int),
6796 .proc_handler
= proc_dointvec
,
6799 .procname
= "keep_addr_on_down",
6800 .data
= &ipv6_devconf
.keep_addr_on_down
,
6801 .maxlen
= sizeof(int),
6803 .proc_handler
= proc_dointvec
,
6807 .procname
= "seg6_enabled",
6808 .data
= &ipv6_devconf
.seg6_enabled
,
6809 .maxlen
= sizeof(int),
6811 .proc_handler
= proc_dointvec
,
6813 #ifdef CONFIG_IPV6_SEG6_HMAC
6815 .procname
= "seg6_require_hmac",
6816 .data
= &ipv6_devconf
.seg6_require_hmac
,
6817 .maxlen
= sizeof(int),
6819 .proc_handler
= proc_dointvec
,
6823 .procname
= "enhanced_dad",
6824 .data
= &ipv6_devconf
.enhanced_dad
,
6825 .maxlen
= sizeof(int),
6827 .proc_handler
= proc_dointvec
,
6830 .procname
= "addr_gen_mode",
6831 .data
= &ipv6_devconf
.addr_gen_mode
,
6832 .maxlen
= sizeof(int),
6834 .proc_handler
= addrconf_sysctl_addr_gen_mode
,
6837 .procname
= "disable_policy",
6838 .data
= &ipv6_devconf
.disable_policy
,
6839 .maxlen
= sizeof(int),
6841 .proc_handler
= addrconf_sysctl_disable_policy
,
6844 .procname
= "ndisc_tclass",
6845 .data
= &ipv6_devconf
.ndisc_tclass
,
6846 .maxlen
= sizeof(int),
6848 .proc_handler
= proc_dointvec_minmax
,
6849 .extra1
= (void *)SYSCTL_ZERO
,
6850 .extra2
= (void *)&two_five_five
,
6857 static int __addrconf_sysctl_register(struct net
*net
, char *dev_name
,
6858 struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
6861 struct ctl_table
*table
;
6862 char path
[sizeof("net/ipv6/conf/") + IFNAMSIZ
];
6864 table
= kmemdup(addrconf_sysctl
, sizeof(addrconf_sysctl
), GFP_KERNEL
);
6868 for (i
= 0; table
[i
].data
; i
++) {
6869 table
[i
].data
+= (char *)p
- (char *)&ipv6_devconf
;
6870 /* If one of these is already set, then it is not safe to
6871 * overwrite either of them: this makes proc_dointvec_minmax
6874 if (!table
[i
].extra1
&& !table
[i
].extra2
) {
6875 table
[i
].extra1
= idev
; /* embedded; no ref */
6876 table
[i
].extra2
= net
;
6880 snprintf(path
, sizeof(path
), "net/ipv6/conf/%s", dev_name
);
6882 p
->sysctl_header
= register_net_sysctl(net
, path
, table
);
6883 if (!p
->sysctl_header
)
6886 if (!strcmp(dev_name
, "all"))
6887 ifindex
= NETCONFA_IFINDEX_ALL
;
6888 else if (!strcmp(dev_name
, "default"))
6889 ifindex
= NETCONFA_IFINDEX_DEFAULT
;
6891 ifindex
= idev
->dev
->ifindex
;
6892 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
, NETCONFA_ALL
,
6902 static void __addrconf_sysctl_unregister(struct net
*net
,
6903 struct ipv6_devconf
*p
, int ifindex
)
6905 struct ctl_table
*table
;
6907 if (!p
->sysctl_header
)
6910 table
= p
->sysctl_header
->ctl_table_arg
;
6911 unregister_net_sysctl_table(p
->sysctl_header
);
6912 p
->sysctl_header
= NULL
;
6915 inet6_netconf_notify_devconf(net
, RTM_DELNETCONF
, 0, ifindex
, NULL
);
6918 static int addrconf_sysctl_register(struct inet6_dev
*idev
)
6922 if (!sysctl_dev_name_is_allowed(idev
->dev
->name
))
6925 err
= neigh_sysctl_register(idev
->dev
, idev
->nd_parms
,
6926 &ndisc_ifinfo_sysctl_change
);
6929 err
= __addrconf_sysctl_register(dev_net(idev
->dev
), idev
->dev
->name
,
6932 neigh_sysctl_unregister(idev
->nd_parms
);
6937 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
6939 __addrconf_sysctl_unregister(dev_net(idev
->dev
), &idev
->cnf
,
6940 idev
->dev
->ifindex
);
6941 neigh_sysctl_unregister(idev
->nd_parms
);
6947 static int __net_init
addrconf_init_net(struct net
*net
)
6950 struct ipv6_devconf
*all
, *dflt
;
6952 all
= kmemdup(&ipv6_devconf
, sizeof(ipv6_devconf
), GFP_KERNEL
);
6956 dflt
= kmemdup(&ipv6_devconf_dflt
, sizeof(ipv6_devconf_dflt
), GFP_KERNEL
);
6958 goto err_alloc_dflt
;
6960 if (IS_ENABLED(CONFIG_SYSCTL
) &&
6961 sysctl_devconf_inherit_init_net
== 1 && !net_eq(net
, &init_net
)) {
6962 memcpy(all
, init_net
.ipv6
.devconf_all
, sizeof(ipv6_devconf
));
6963 memcpy(dflt
, init_net
.ipv6
.devconf_dflt
, sizeof(ipv6_devconf_dflt
));
6966 /* these will be inherited by all namespaces */
6967 dflt
->autoconf
= ipv6_defaults
.autoconf
;
6968 dflt
->disable_ipv6
= ipv6_defaults
.disable_ipv6
;
6970 dflt
->stable_secret
.initialized
= false;
6971 all
->stable_secret
.initialized
= false;
6973 net
->ipv6
.devconf_all
= all
;
6974 net
->ipv6
.devconf_dflt
= dflt
;
6976 #ifdef CONFIG_SYSCTL
6977 err
= __addrconf_sysctl_register(net
, "all", NULL
, all
);
6981 err
= __addrconf_sysctl_register(net
, "default", NULL
, dflt
);
6987 #ifdef CONFIG_SYSCTL
6989 __addrconf_sysctl_unregister(net
, all
, NETCONFA_IFINDEX_ALL
);
6999 static void __net_exit
addrconf_exit_net(struct net
*net
)
7001 #ifdef CONFIG_SYSCTL
7002 __addrconf_sysctl_unregister(net
, net
->ipv6
.devconf_dflt
,
7003 NETCONFA_IFINDEX_DEFAULT
);
7004 __addrconf_sysctl_unregister(net
, net
->ipv6
.devconf_all
,
7005 NETCONFA_IFINDEX_ALL
);
7007 kfree(net
->ipv6
.devconf_dflt
);
7008 kfree(net
->ipv6
.devconf_all
);
7011 static struct pernet_operations addrconf_ops
= {
7012 .init
= addrconf_init_net
,
7013 .exit
= addrconf_exit_net
,
7016 static struct rtnl_af_ops inet6_ops __read_mostly
= {
7018 .fill_link_af
= inet6_fill_link_af
,
7019 .get_link_af_size
= inet6_get_link_af_size
,
7020 .validate_link_af
= inet6_validate_link_af
,
7021 .set_link_af
= inet6_set_link_af
,
7025 * Init / cleanup code
7028 int __init
addrconf_init(void)
7030 struct inet6_dev
*idev
;
7033 err
= ipv6_addr_label_init();
7035 pr_crit("%s: cannot initialize default policy table: %d\n",
7040 err
= register_pernet_subsys(&addrconf_ops
);
7044 addrconf_wq
= create_workqueue("ipv6_addrconf");
7050 /* The addrconf netdev notifier requires that loopback_dev
7051 * has it's ipv6 private information allocated and setup
7052 * before it can bring up and give link-local addresses
7053 * to other devices which are up.
7055 * Unfortunately, loopback_dev is not necessarily the first
7056 * entry in the global dev_base list of net devices. In fact,
7057 * it is likely to be the very last entry on that list.
7058 * So this causes the notifier registry below to try and
7059 * give link-local addresses to all devices besides loopback_dev
7060 * first, then loopback_dev, which cases all the non-loopback_dev
7061 * devices to fail to get a link-local address.
7063 * So, as a temporary fix, allocate the ipv6 structure for
7064 * loopback_dev first by hand.
7065 * Longer term, all of the dependencies ipv6 has upon the loopback
7066 * device and it being up should be removed.
7069 idev
= ipv6_add_dev(init_net
.loopback_dev
);
7072 err
= PTR_ERR(idev
);
7076 ip6_route_init_special_entries();
7078 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
7079 INIT_HLIST_HEAD(&inet6_addr_lst
[i
]);
7081 register_netdevice_notifier(&ipv6_dev_notf
);
7085 rtnl_af_register(&inet6_ops
);
7087 err
= rtnl_register_module(THIS_MODULE
, PF_INET6
, RTM_GETLINK
,
7088 NULL
, inet6_dump_ifinfo
, 0);
7092 err
= rtnl_register_module(THIS_MODULE
, PF_INET6
, RTM_NEWADDR
,
7093 inet6_rtm_newaddr
, NULL
, 0);
7096 err
= rtnl_register_module(THIS_MODULE
, PF_INET6
, RTM_DELADDR
,
7097 inet6_rtm_deladdr
, NULL
, 0);
7100 err
= rtnl_register_module(THIS_MODULE
, PF_INET6
, RTM_GETADDR
,
7101 inet6_rtm_getaddr
, inet6_dump_ifaddr
,
7102 RTNL_FLAG_DOIT_UNLOCKED
);
7105 err
= rtnl_register_module(THIS_MODULE
, PF_INET6
, RTM_GETMULTICAST
,
7106 NULL
, inet6_dump_ifmcaddr
, 0);
7109 err
= rtnl_register_module(THIS_MODULE
, PF_INET6
, RTM_GETANYCAST
,
7110 NULL
, inet6_dump_ifacaddr
, 0);
7113 err
= rtnl_register_module(THIS_MODULE
, PF_INET6
, RTM_GETNETCONF
,
7114 inet6_netconf_get_devconf
,
7115 inet6_netconf_dump_devconf
,
7116 RTNL_FLAG_DOIT_UNLOCKED
);
7119 err
= ipv6_addr_label_rtnl_register();
7125 rtnl_unregister_all(PF_INET6
);
7126 rtnl_af_unregister(&inet6_ops
);
7127 unregister_netdevice_notifier(&ipv6_dev_notf
);
7129 destroy_workqueue(addrconf_wq
);
7131 unregister_pernet_subsys(&addrconf_ops
);
7133 ipv6_addr_label_cleanup();
7138 void addrconf_cleanup(void)
7140 struct net_device
*dev
;
7143 unregister_netdevice_notifier(&ipv6_dev_notf
);
7144 unregister_pernet_subsys(&addrconf_ops
);
7145 ipv6_addr_label_cleanup();
7147 rtnl_af_unregister(&inet6_ops
);
7151 /* clean dev list */
7152 for_each_netdev(&init_net
, dev
) {
7153 if (__in6_dev_get(dev
) == NULL
)
7155 addrconf_ifdown(dev
, 1);
7157 addrconf_ifdown(init_net
.loopback_dev
, 2);
7162 spin_lock_bh(&addrconf_hash_lock
);
7163 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
7164 WARN_ON(!hlist_empty(&inet6_addr_lst
[i
]));
7165 spin_unlock_bh(&addrconf_hash_lock
);
7166 cancel_delayed_work(&addr_chk_work
);
7169 destroy_workqueue(addrconf_wq
);