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
, bool del_rt
)
1231 struct fib6_info
*f6i
;
1233 f6i
= addrconf_get_prefix_route(&ifp
->addr
, ifp
->prefix_len
,
1234 ifp
->idev
->dev
, 0, RTF_DEFAULT
, true);
1237 ip6_del_rt(dev_net(ifp
->idev
->dev
), f6i
);
1239 if (!(f6i
->fib6_flags
& RTF_EXPIRES
))
1240 fib6_set_expires(f6i
, expires
);
1241 fib6_info_release(f6i
);
1247 /* This function wants to get referenced ifp and releases it before return */
1249 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
1252 enum cleanup_prefix_rt_t action
= CLEANUP_PREFIX_RT_NOP
;
1253 unsigned long expires
;
1257 spin_lock_bh(&ifp
->lock
);
1259 ifp
->state
= INET6_IFADDR_STATE_DEAD
;
1260 spin_unlock_bh(&ifp
->lock
);
1262 if (state
== INET6_IFADDR_STATE_DEAD
)
1265 spin_lock_bh(&addrconf_hash_lock
);
1266 hlist_del_init_rcu(&ifp
->addr_lst
);
1267 spin_unlock_bh(&addrconf_hash_lock
);
1269 write_lock_bh(&ifp
->idev
->lock
);
1271 if (ifp
->flags
&IFA_F_TEMPORARY
) {
1272 list_del(&ifp
->tmp_list
);
1274 in6_ifa_put(ifp
->ifpub
);
1280 if (ifp
->flags
& IFA_F_PERMANENT
&& !(ifp
->flags
& IFA_F_NOPREFIXROUTE
))
1281 action
= check_cleanup_prefix_route(ifp
, &expires
);
1283 list_del_rcu(&ifp
->if_list
);
1286 write_unlock_bh(&ifp
->idev
->lock
);
1288 addrconf_del_dad_work(ifp
);
1290 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
1292 inet6addr_notifier_call_chain(NETDEV_DOWN
, ifp
);
1294 if (action
!= CLEANUP_PREFIX_RT_NOP
) {
1295 cleanup_prefix_route(ifp
, expires
,
1296 action
== CLEANUP_PREFIX_RT_DEL
);
1299 /* clean up prefsrc entries */
1300 rt6_remove_prefsrc(ifp
);
1305 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
,
1306 struct inet6_ifaddr
*ift
,
1309 struct inet6_dev
*idev
= ifp
->idev
;
1310 struct in6_addr addr
, *tmpaddr
;
1311 unsigned long tmp_tstamp
, age
;
1312 unsigned long regen_advance
;
1313 struct ifa6_config cfg
;
1315 unsigned long now
= jiffies
;
1316 long max_desync_factor
;
1317 s32 cnf_temp_preferred_lft
;
1319 write_lock_bh(&idev
->lock
);
1321 spin_lock_bh(&ift
->lock
);
1322 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
1323 spin_unlock_bh(&ift
->lock
);
1330 if (idev
->cnf
.use_tempaddr
<= 0) {
1331 write_unlock_bh(&idev
->lock
);
1332 pr_info("%s: use_tempaddr is disabled\n", __func__
);
1337 spin_lock_bh(&ifp
->lock
);
1338 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
1339 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
1340 spin_unlock_bh(&ifp
->lock
);
1341 write_unlock_bh(&idev
->lock
);
1342 pr_warn("%s: regeneration time exceeded - disabled temporary address support\n",
1349 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
1350 ipv6_try_regen_rndid(idev
, tmpaddr
);
1351 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
1352 age
= (now
- ifp
->tstamp
) / HZ
;
1354 regen_advance
= idev
->cnf
.regen_max_retry
*
1355 idev
->cnf
.dad_transmits
*
1356 NEIGH_VAR(idev
->nd_parms
, RETRANS_TIME
) / HZ
;
1358 /* recalculate max_desync_factor each time and update
1359 * idev->desync_factor if it's larger
1361 cnf_temp_preferred_lft
= READ_ONCE(idev
->cnf
.temp_prefered_lft
);
1362 max_desync_factor
= min_t(__u32
,
1363 idev
->cnf
.max_desync_factor
,
1364 cnf_temp_preferred_lft
- regen_advance
);
1366 if (unlikely(idev
->desync_factor
> max_desync_factor
)) {
1367 if (max_desync_factor
> 0) {
1368 get_random_bytes(&idev
->desync_factor
,
1369 sizeof(idev
->desync_factor
));
1370 idev
->desync_factor
%= max_desync_factor
;
1372 idev
->desync_factor
= 0;
1376 memset(&cfg
, 0, sizeof(cfg
));
1377 cfg
.valid_lft
= min_t(__u32
, ifp
->valid_lft
,
1378 idev
->cnf
.temp_valid_lft
+ age
);
1379 cfg
.preferred_lft
= cnf_temp_preferred_lft
+ age
- idev
->desync_factor
;
1380 cfg
.preferred_lft
= min_t(__u32
, ifp
->prefered_lft
, cfg
.preferred_lft
);
1382 cfg
.plen
= ifp
->prefix_len
;
1383 tmp_tstamp
= ifp
->tstamp
;
1384 spin_unlock_bh(&ifp
->lock
);
1386 write_unlock_bh(&idev
->lock
);
1388 /* A temporary address is created only if this calculated Preferred
1389 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
1390 * an implementation must not create a temporary address with a zero
1391 * Preferred Lifetime.
1392 * Use age calculation as in addrconf_verify to avoid unnecessary
1393 * temporary addresses being generated.
1395 age
= (now
- tmp_tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
1396 if (cfg
.preferred_lft
<= regen_advance
+ age
) {
1403 cfg
.ifa_flags
= IFA_F_TEMPORARY
;
1404 /* set in addrconf_prefix_rcv() */
1405 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
1406 cfg
.ifa_flags
|= IFA_F_OPTIMISTIC
;
1409 cfg
.scope
= ipv6_addr_scope(cfg
.pfx
);
1411 ift
= ipv6_add_addr(idev
, &cfg
, block
, NULL
);
1415 pr_info("%s: retry temporary address regeneration\n", __func__
);
1417 write_lock_bh(&idev
->lock
);
1421 spin_lock_bh(&ift
->lock
);
1424 ift
->tstamp
= tmp_tstamp
;
1425 spin_unlock_bh(&ift
->lock
);
1427 addrconf_dad_start(ift
);
1435 * Choose an appropriate source address (RFC3484)
1438 IPV6_SADDR_RULE_INIT
= 0,
1439 IPV6_SADDR_RULE_LOCAL
,
1440 IPV6_SADDR_RULE_SCOPE
,
1441 IPV6_SADDR_RULE_PREFERRED
,
1442 #ifdef CONFIG_IPV6_MIP6
1443 IPV6_SADDR_RULE_HOA
,
1445 IPV6_SADDR_RULE_OIF
,
1446 IPV6_SADDR_RULE_LABEL
,
1447 IPV6_SADDR_RULE_PRIVACY
,
1448 IPV6_SADDR_RULE_ORCHID
,
1449 IPV6_SADDR_RULE_PREFIX
,
1450 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1451 IPV6_SADDR_RULE_NOT_OPTIMISTIC
,
1456 struct ipv6_saddr_score
{
1459 struct inet6_ifaddr
*ifa
;
1460 DECLARE_BITMAP(scorebits
, IPV6_SADDR_RULE_MAX
);
1465 struct ipv6_saddr_dst
{
1466 const struct in6_addr
*addr
;
1473 static inline int ipv6_saddr_preferred(int type
)
1475 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|IPV6_ADDR_LOOPBACK
))
1480 static bool ipv6_use_optimistic_addr(struct net
*net
,
1481 struct inet6_dev
*idev
)
1483 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1486 if (!net
->ipv6
.devconf_all
->optimistic_dad
&& !idev
->cnf
.optimistic_dad
)
1488 if (!net
->ipv6
.devconf_all
->use_optimistic
&& !idev
->cnf
.use_optimistic
)
1497 static bool ipv6_allow_optimistic_dad(struct net
*net
,
1498 struct inet6_dev
*idev
)
1500 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1503 if (!net
->ipv6
.devconf_all
->optimistic_dad
&& !idev
->cnf
.optimistic_dad
)
1512 static int ipv6_get_saddr_eval(struct net
*net
,
1513 struct ipv6_saddr_score
*score
,
1514 struct ipv6_saddr_dst
*dst
,
1519 if (i
<= score
->rule
) {
1521 case IPV6_SADDR_RULE_SCOPE
:
1522 ret
= score
->scopedist
;
1524 case IPV6_SADDR_RULE_PREFIX
:
1525 ret
= score
->matchlen
;
1528 ret
= !!test_bit(i
, score
->scorebits
);
1534 case IPV6_SADDR_RULE_INIT
:
1535 /* Rule 0: remember if hiscore is not ready yet */
1538 case IPV6_SADDR_RULE_LOCAL
:
1539 /* Rule 1: Prefer same address */
1540 ret
= ipv6_addr_equal(&score
->ifa
->addr
, dst
->addr
);
1542 case IPV6_SADDR_RULE_SCOPE
:
1543 /* Rule 2: Prefer appropriate scope
1548 * ---+--+-+---> scope
1550 * | d is scope of the destination.
1552 * | \ <- smaller scope is better if
1553 * B-15 | \ if scope is enough for destination.
1554 * | ret = B - scope (-1 <= scope >= d <= 15).
1556 * |/ <- greater is better
1557 * -C / if scope is not enough for destination.
1558 * /| ret = scope - C (-1 <= d < scope <= 15).
1560 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1561 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1562 * Assume B = 0 and we get C > 29.
1564 ret
= __ipv6_addr_src_scope(score
->addr_type
);
1565 if (ret
>= dst
->scope
)
1568 ret
-= 128; /* 30 is enough */
1569 score
->scopedist
= ret
;
1571 case IPV6_SADDR_RULE_PREFERRED
:
1573 /* Rule 3: Avoid deprecated and optimistic addresses */
1574 u8 avoid
= IFA_F_DEPRECATED
;
1576 if (!ipv6_use_optimistic_addr(net
, score
->ifa
->idev
))
1577 avoid
|= IFA_F_OPTIMISTIC
;
1578 ret
= ipv6_saddr_preferred(score
->addr_type
) ||
1579 !(score
->ifa
->flags
& avoid
);
1582 #ifdef CONFIG_IPV6_MIP6
1583 case IPV6_SADDR_RULE_HOA
:
1585 /* Rule 4: Prefer home address */
1586 int prefhome
= !(dst
->prefs
& IPV6_PREFER_SRC_COA
);
1587 ret
= !(score
->ifa
->flags
& IFA_F_HOMEADDRESS
) ^ prefhome
;
1591 case IPV6_SADDR_RULE_OIF
:
1592 /* Rule 5: Prefer outgoing interface */
1593 ret
= (!dst
->ifindex
||
1594 dst
->ifindex
== score
->ifa
->idev
->dev
->ifindex
);
1596 case IPV6_SADDR_RULE_LABEL
:
1597 /* Rule 6: Prefer matching label */
1598 ret
= ipv6_addr_label(net
,
1599 &score
->ifa
->addr
, score
->addr_type
,
1600 score
->ifa
->idev
->dev
->ifindex
) == dst
->label
;
1602 case IPV6_SADDR_RULE_PRIVACY
:
1604 /* Rule 7: Prefer public address
1605 * Note: prefer temporary address if use_tempaddr >= 2
1607 int preftmp
= dst
->prefs
& (IPV6_PREFER_SRC_PUBLIC
|IPV6_PREFER_SRC_TMP
) ?
1608 !!(dst
->prefs
& IPV6_PREFER_SRC_TMP
) :
1609 score
->ifa
->idev
->cnf
.use_tempaddr
>= 2;
1610 ret
= (!(score
->ifa
->flags
& IFA_F_TEMPORARY
)) ^ preftmp
;
1613 case IPV6_SADDR_RULE_ORCHID
:
1614 /* Rule 8-: Prefer ORCHID vs ORCHID or
1615 * non-ORCHID vs non-ORCHID
1617 ret
= !(ipv6_addr_orchid(&score
->ifa
->addr
) ^
1618 ipv6_addr_orchid(dst
->addr
));
1620 case IPV6_SADDR_RULE_PREFIX
:
1621 /* Rule 8: Use longest matching prefix */
1622 ret
= ipv6_addr_diff(&score
->ifa
->addr
, dst
->addr
);
1623 if (ret
> score
->ifa
->prefix_len
)
1624 ret
= score
->ifa
->prefix_len
;
1625 score
->matchlen
= ret
;
1627 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1628 case IPV6_SADDR_RULE_NOT_OPTIMISTIC
:
1629 /* Optimistic addresses still have lower precedence than other
1630 * preferred addresses.
1632 ret
= !(score
->ifa
->flags
& IFA_F_OPTIMISTIC
);
1640 __set_bit(i
, score
->scorebits
);
1646 static int __ipv6_dev_get_saddr(struct net
*net
,
1647 struct ipv6_saddr_dst
*dst
,
1648 struct inet6_dev
*idev
,
1649 struct ipv6_saddr_score
*scores
,
1652 struct ipv6_saddr_score
*score
= &scores
[1 - hiscore_idx
], *hiscore
= &scores
[hiscore_idx
];
1654 list_for_each_entry_rcu(score
->ifa
, &idev
->addr_list
, if_list
) {
1658 * - Tentative Address (RFC2462 section 5.4)
1659 * - A tentative address is not considered
1660 * "assigned to an interface" in the traditional
1661 * sense, unless it is also flagged as optimistic.
1662 * - Candidate Source Address (section 4)
1663 * - In any case, anycast addresses, multicast
1664 * addresses, and the unspecified address MUST
1665 * NOT be included in a candidate set.
1667 if ((score
->ifa
->flags
& IFA_F_TENTATIVE
) &&
1668 (!(score
->ifa
->flags
& IFA_F_OPTIMISTIC
)))
1671 score
->addr_type
= __ipv6_addr_type(&score
->ifa
->addr
);
1673 if (unlikely(score
->addr_type
== IPV6_ADDR_ANY
||
1674 score
->addr_type
& IPV6_ADDR_MULTICAST
)) {
1675 net_dbg_ratelimited("ADDRCONF: unspecified / multicast address assigned as unicast address on %s",
1681 bitmap_zero(score
->scorebits
, IPV6_SADDR_RULE_MAX
);
1683 for (i
= 0; i
< IPV6_SADDR_RULE_MAX
; i
++) {
1684 int minihiscore
, miniscore
;
1686 minihiscore
= ipv6_get_saddr_eval(net
, hiscore
, dst
, i
);
1687 miniscore
= ipv6_get_saddr_eval(net
, score
, dst
, i
);
1689 if (minihiscore
> miniscore
) {
1690 if (i
== IPV6_SADDR_RULE_SCOPE
&&
1691 score
->scopedist
> 0) {
1694 * each remaining entry
1695 * has too small (not enough)
1696 * scope, because ifa entries
1697 * are sorted by their scope
1703 } else if (minihiscore
< miniscore
) {
1704 swap(hiscore
, score
);
1705 hiscore_idx
= 1 - hiscore_idx
;
1707 /* restore our iterator */
1708 score
->ifa
= hiscore
->ifa
;
1718 static int ipv6_get_saddr_master(struct net
*net
,
1719 const struct net_device
*dst_dev
,
1720 const struct net_device
*master
,
1721 struct ipv6_saddr_dst
*dst
,
1722 struct ipv6_saddr_score
*scores
,
1725 struct inet6_dev
*idev
;
1727 idev
= __in6_dev_get(dst_dev
);
1729 hiscore_idx
= __ipv6_dev_get_saddr(net
, dst
, idev
,
1730 scores
, hiscore_idx
);
1732 idev
= __in6_dev_get(master
);
1734 hiscore_idx
= __ipv6_dev_get_saddr(net
, dst
, idev
,
1735 scores
, hiscore_idx
);
1740 int ipv6_dev_get_saddr(struct net
*net
, const struct net_device
*dst_dev
,
1741 const struct in6_addr
*daddr
, unsigned int prefs
,
1742 struct in6_addr
*saddr
)
1744 struct ipv6_saddr_score scores
[2], *hiscore
;
1745 struct ipv6_saddr_dst dst
;
1746 struct inet6_dev
*idev
;
1747 struct net_device
*dev
;
1749 bool use_oif_addr
= false;
1750 int hiscore_idx
= 0;
1753 dst_type
= __ipv6_addr_type(daddr
);
1755 dst
.ifindex
= dst_dev
? dst_dev
->ifindex
: 0;
1756 dst
.scope
= __ipv6_addr_src_scope(dst_type
);
1757 dst
.label
= ipv6_addr_label(net
, daddr
, dst_type
, dst
.ifindex
);
1760 scores
[hiscore_idx
].rule
= -1;
1761 scores
[hiscore_idx
].ifa
= NULL
;
1765 /* Candidate Source Address (section 4)
1766 * - multicast and link-local destination address,
1767 * the set of candidate source address MUST only
1768 * include addresses assigned to interfaces
1769 * belonging to the same link as the outgoing
1771 * (- For site-local destination addresses, the
1772 * set of candidate source addresses MUST only
1773 * include addresses assigned to interfaces
1774 * belonging to the same site as the outgoing
1776 * - "It is RECOMMENDED that the candidate source addresses
1777 * be the set of unicast addresses assigned to the
1778 * interface that will be used to send to the destination
1779 * (the 'outgoing' interface)." (RFC 6724)
1782 idev
= __in6_dev_get(dst_dev
);
1783 if ((dst_type
& IPV6_ADDR_MULTICAST
) ||
1784 dst
.scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
||
1785 (idev
&& idev
->cnf
.use_oif_addrs_only
)) {
1786 use_oif_addr
= true;
1792 hiscore_idx
= __ipv6_dev_get_saddr(net
, &dst
, idev
, scores
, hiscore_idx
);
1794 const struct net_device
*master
;
1797 /* if dst_dev exists and is enslaved to an L3 device, then
1798 * prefer addresses from dst_dev and then the master over
1799 * any other enslaved devices in the L3 domain.
1801 master
= l3mdev_master_dev_rcu(dst_dev
);
1803 master_idx
= master
->ifindex
;
1805 hiscore_idx
= ipv6_get_saddr_master(net
, dst_dev
,
1807 scores
, hiscore_idx
);
1809 if (scores
[hiscore_idx
].ifa
)
1813 for_each_netdev_rcu(net
, dev
) {
1814 /* only consider addresses on devices in the
1817 if (l3mdev_master_ifindex_rcu(dev
) != master_idx
)
1819 idev
= __in6_dev_get(dev
);
1822 hiscore_idx
= __ipv6_dev_get_saddr(net
, &dst
, idev
, scores
, hiscore_idx
);
1827 hiscore
= &scores
[hiscore_idx
];
1829 ret
= -EADDRNOTAVAIL
;
1831 *saddr
= hiscore
->ifa
->addr
;
1836 EXPORT_SYMBOL(ipv6_dev_get_saddr
);
1838 int __ipv6_get_lladdr(struct inet6_dev
*idev
, struct in6_addr
*addr
,
1841 struct inet6_ifaddr
*ifp
;
1842 int err
= -EADDRNOTAVAIL
;
1844 list_for_each_entry_reverse(ifp
, &idev
->addr_list
, if_list
) {
1845 if (ifp
->scope
> IFA_LINK
)
1847 if (ifp
->scope
== IFA_LINK
&&
1848 !(ifp
->flags
& banned_flags
)) {
1857 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1860 struct inet6_dev
*idev
;
1861 int err
= -EADDRNOTAVAIL
;
1864 idev
= __in6_dev_get(dev
);
1866 read_lock_bh(&idev
->lock
);
1867 err
= __ipv6_get_lladdr(idev
, addr
, banned_flags
);
1868 read_unlock_bh(&idev
->lock
);
1874 static int ipv6_count_addresses(const struct inet6_dev
*idev
)
1876 const struct inet6_ifaddr
*ifp
;
1880 list_for_each_entry_rcu(ifp
, &idev
->addr_list
, if_list
)
1886 int ipv6_chk_addr(struct net
*net
, const struct in6_addr
*addr
,
1887 const struct net_device
*dev
, int strict
)
1889 return ipv6_chk_addr_and_flags(net
, addr
, dev
, !dev
,
1890 strict
, IFA_F_TENTATIVE
);
1892 EXPORT_SYMBOL(ipv6_chk_addr
);
1894 /* device argument is used to find the L3 domain of interest. If
1895 * skip_dev_check is set, then the ifp device is not checked against
1896 * the passed in dev argument. So the 2 cases for addresses checks are:
1897 * 1. does the address exist in the L3 domain that dev is part of
1898 * (skip_dev_check = true), or
1900 * 2. does the address exist on the specific device
1901 * (skip_dev_check = false)
1903 int ipv6_chk_addr_and_flags(struct net
*net
, const struct in6_addr
*addr
,
1904 const struct net_device
*dev
, bool skip_dev_check
,
1905 int strict
, u32 banned_flags
)
1907 unsigned int hash
= inet6_addr_hash(net
, addr
);
1908 const struct net_device
*l3mdev
;
1909 struct inet6_ifaddr
*ifp
;
1914 l3mdev
= l3mdev_master_dev_rcu(dev
);
1918 hlist_for_each_entry_rcu(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1919 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1922 if (l3mdev_master_dev_rcu(ifp
->idev
->dev
) != l3mdev
)
1925 /* Decouple optimistic from tentative for evaluation here.
1926 * Ban optimistic addresses explicitly, when required.
1928 ifp_flags
= (ifp
->flags
&IFA_F_OPTIMISTIC
)
1929 ? (ifp
->flags
&~IFA_F_TENTATIVE
)
1931 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1932 !(ifp_flags
&banned_flags
) &&
1933 (!dev
|| ifp
->idev
->dev
== dev
||
1934 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))) {
1943 EXPORT_SYMBOL(ipv6_chk_addr_and_flags
);
1946 /* Compares an address/prefix_len with addresses on device @dev.
1947 * If one is found it returns true.
1949 bool ipv6_chk_custom_prefix(const struct in6_addr
*addr
,
1950 const unsigned int prefix_len
, struct net_device
*dev
)
1952 const struct inet6_ifaddr
*ifa
;
1953 const struct inet6_dev
*idev
;
1957 idev
= __in6_dev_get(dev
);
1959 list_for_each_entry_rcu(ifa
, &idev
->addr_list
, if_list
) {
1960 ret
= ipv6_prefix_equal(addr
, &ifa
->addr
, prefix_len
);
1969 EXPORT_SYMBOL(ipv6_chk_custom_prefix
);
1971 int ipv6_chk_prefix(const struct in6_addr
*addr
, struct net_device
*dev
)
1973 const struct inet6_ifaddr
*ifa
;
1974 const struct inet6_dev
*idev
;
1979 idev
= __in6_dev_get(dev
);
1981 list_for_each_entry_rcu(ifa
, &idev
->addr_list
, if_list
) {
1982 onlink
= ipv6_prefix_equal(addr
, &ifa
->addr
,
1991 EXPORT_SYMBOL(ipv6_chk_prefix
);
1993 struct inet6_ifaddr
*ipv6_get_ifaddr(struct net
*net
, const struct in6_addr
*addr
,
1994 struct net_device
*dev
, int strict
)
1996 unsigned int hash
= inet6_addr_hash(net
, addr
);
1997 struct inet6_ifaddr
*ifp
, *result
= NULL
;
2000 hlist_for_each_entry_rcu(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
2001 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
2003 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
2004 if (!dev
|| ifp
->idev
->dev
== dev
||
2005 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
2017 /* Gets referenced address, destroys ifaddr */
2019 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
, int dad_failed
)
2022 ifp
->flags
|= IFA_F_DADFAILED
;
2024 if (ifp
->flags
&IFA_F_TEMPORARY
) {
2025 struct inet6_ifaddr
*ifpub
;
2026 spin_lock_bh(&ifp
->lock
);
2029 in6_ifa_hold(ifpub
);
2030 spin_unlock_bh(&ifp
->lock
);
2031 ipv6_create_tempaddr(ifpub
, ifp
, true);
2034 spin_unlock_bh(&ifp
->lock
);
2037 } else if (ifp
->flags
&IFA_F_PERMANENT
|| !dad_failed
) {
2038 spin_lock_bh(&ifp
->lock
);
2039 addrconf_del_dad_work(ifp
);
2040 ifp
->flags
|= IFA_F_TENTATIVE
;
2042 ifp
->flags
&= ~IFA_F_OPTIMISTIC
;
2043 spin_unlock_bh(&ifp
->lock
);
2045 ipv6_ifa_notify(0, ifp
);
2052 static int addrconf_dad_end(struct inet6_ifaddr
*ifp
)
2056 spin_lock_bh(&ifp
->lock
);
2057 if (ifp
->state
== INET6_IFADDR_STATE_DAD
) {
2058 ifp
->state
= INET6_IFADDR_STATE_POSTDAD
;
2061 spin_unlock_bh(&ifp
->lock
);
2066 void addrconf_dad_failure(struct sk_buff
*skb
, struct inet6_ifaddr
*ifp
)
2068 struct inet6_dev
*idev
= ifp
->idev
;
2069 struct net
*net
= dev_net(ifp
->idev
->dev
);
2071 if (addrconf_dad_end(ifp
)) {
2076 net_info_ratelimited("%s: IPv6 duplicate address %pI6c used by %pM detected!\n",
2077 ifp
->idev
->dev
->name
, &ifp
->addr
, eth_hdr(skb
)->h_source
);
2079 spin_lock_bh(&ifp
->lock
);
2081 if (ifp
->flags
& IFA_F_STABLE_PRIVACY
) {
2082 struct in6_addr new_addr
;
2083 struct inet6_ifaddr
*ifp2
;
2084 int retries
= ifp
->stable_privacy_retry
+ 1;
2085 struct ifa6_config cfg
= {
2087 .plen
= ifp
->prefix_len
,
2088 .ifa_flags
= ifp
->flags
,
2089 .valid_lft
= ifp
->valid_lft
,
2090 .preferred_lft
= ifp
->prefered_lft
,
2091 .scope
= ifp
->scope
,
2094 if (retries
> net
->ipv6
.sysctl
.idgen_retries
) {
2095 net_info_ratelimited("%s: privacy stable address generation failed because of DAD conflicts!\n",
2096 ifp
->idev
->dev
->name
);
2100 new_addr
= ifp
->addr
;
2101 if (ipv6_generate_stable_address(&new_addr
, retries
,
2105 spin_unlock_bh(&ifp
->lock
);
2107 if (idev
->cnf
.max_addresses
&&
2108 ipv6_count_addresses(idev
) >=
2109 idev
->cnf
.max_addresses
)
2112 net_info_ratelimited("%s: generating new stable privacy address because of DAD conflict\n",
2113 ifp
->idev
->dev
->name
);
2115 ifp2
= ipv6_add_addr(idev
, &cfg
, false, NULL
);
2119 spin_lock_bh(&ifp2
->lock
);
2120 ifp2
->stable_privacy_retry
= retries
;
2121 ifp2
->state
= INET6_IFADDR_STATE_PREDAD
;
2122 spin_unlock_bh(&ifp2
->lock
);
2124 addrconf_mod_dad_work(ifp2
, net
->ipv6
.sysctl
.idgen_delay
);
2127 spin_lock_bh(&ifp
->lock
);
2131 /* transition from _POSTDAD to _ERRDAD */
2132 ifp
->state
= INET6_IFADDR_STATE_ERRDAD
;
2133 spin_unlock_bh(&ifp
->lock
);
2135 addrconf_mod_dad_work(ifp
, 0);
2139 /* Join to solicited addr multicast group.
2140 * caller must hold RTNL */
2141 void addrconf_join_solict(struct net_device
*dev
, const struct in6_addr
*addr
)
2143 struct in6_addr maddr
;
2145 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
2148 addrconf_addr_solict_mult(addr
, &maddr
);
2149 ipv6_dev_mc_inc(dev
, &maddr
);
2152 /* caller must hold RTNL */
2153 void addrconf_leave_solict(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
2155 struct in6_addr maddr
;
2157 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
2160 addrconf_addr_solict_mult(addr
, &maddr
);
2161 __ipv6_dev_mc_dec(idev
, &maddr
);
2164 /* caller must hold RTNL */
2165 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
2167 struct in6_addr addr
;
2169 if (ifp
->prefix_len
>= 127) /* RFC 6164 */
2171 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
2172 if (ipv6_addr_any(&addr
))
2174 __ipv6_dev_ac_inc(ifp
->idev
, &addr
);
2177 /* caller must hold RTNL */
2178 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
2180 struct in6_addr addr
;
2182 if (ifp
->prefix_len
>= 127) /* RFC 6164 */
2184 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
2185 if (ipv6_addr_any(&addr
))
2187 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
2190 static int addrconf_ifid_6lowpan(u8
*eui
, struct net_device
*dev
)
2192 switch (dev
->addr_len
) {
2194 memcpy(eui
, dev
->dev_addr
, 3);
2197 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
2199 case EUI64_ADDR_LEN
:
2200 memcpy(eui
, dev
->dev_addr
, EUI64_ADDR_LEN
);
2210 static int addrconf_ifid_ieee1394(u8
*eui
, struct net_device
*dev
)
2212 union fwnet_hwaddr
*ha
;
2214 if (dev
->addr_len
!= FWNET_ALEN
)
2217 ha
= (union fwnet_hwaddr
*)dev
->dev_addr
;
2219 memcpy(eui
, &ha
->uc
.uniq_id
, sizeof(ha
->uc
.uniq_id
));
2224 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
2226 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
2227 if (dev
->addr_len
!= ARCNET_ALEN
)
2230 eui
[7] = *(u8
*)dev
->dev_addr
;
2234 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
2236 if (dev
->addr_len
!= INFINIBAND_ALEN
)
2238 memcpy(eui
, dev
->dev_addr
+ 12, 8);
2243 static int __ipv6_isatap_ifid(u8
*eui
, __be32 addr
)
2247 eui
[0] = (ipv4_is_zeronet(addr
) || ipv4_is_private_10(addr
) ||
2248 ipv4_is_loopback(addr
) || ipv4_is_linklocal_169(addr
) ||
2249 ipv4_is_private_172(addr
) || ipv4_is_test_192(addr
) ||
2250 ipv4_is_anycast_6to4(addr
) || ipv4_is_private_192(addr
) ||
2251 ipv4_is_test_198(addr
) || ipv4_is_multicast(addr
) ||
2252 ipv4_is_lbcast(addr
)) ? 0x00 : 0x02;
2256 memcpy(eui
+ 4, &addr
, 4);
2260 static int addrconf_ifid_sit(u8
*eui
, struct net_device
*dev
)
2262 if (dev
->priv_flags
& IFF_ISATAP
)
2263 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
2267 static int addrconf_ifid_gre(u8
*eui
, struct net_device
*dev
)
2269 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
2272 static int addrconf_ifid_ip6tnl(u8
*eui
, struct net_device
*dev
)
2274 memcpy(eui
, dev
->perm_addr
, 3);
2275 memcpy(eui
+ 5, dev
->perm_addr
+ 3, 3);
2282 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
2284 switch (dev
->type
) {
2287 return addrconf_ifid_eui48(eui
, dev
);
2289 return addrconf_ifid_arcnet(eui
, dev
);
2290 case ARPHRD_INFINIBAND
:
2291 return addrconf_ifid_infiniband(eui
, dev
);
2293 return addrconf_ifid_sit(eui
, dev
);
2296 return addrconf_ifid_gre(eui
, dev
);
2297 case ARPHRD_6LOWPAN
:
2298 return addrconf_ifid_6lowpan(eui
, dev
);
2299 case ARPHRD_IEEE1394
:
2300 return addrconf_ifid_ieee1394(eui
, dev
);
2301 case ARPHRD_TUNNEL6
:
2304 return addrconf_ifid_ip6tnl(eui
, dev
);
2309 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
2312 struct inet6_ifaddr
*ifp
;
2314 read_lock_bh(&idev
->lock
);
2315 list_for_each_entry_reverse(ifp
, &idev
->addr_list
, if_list
) {
2316 if (ifp
->scope
> IFA_LINK
)
2318 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2319 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
2324 read_unlock_bh(&idev
->lock
);
2328 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
2329 static void ipv6_regen_rndid(struct inet6_dev
*idev
)
2332 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
2333 idev
->rndid
[0] &= ~0x02;
2336 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
2337 * check if generated address is not inappropriate
2339 * - Reserved subnet anycast (RFC 2526)
2340 * 11111101 11....11 1xxxxxxx
2341 * - ISATAP (RFC4214) 6.1
2342 * 00-00-5E-FE-xx-xx-xx-xx
2344 * - XXX: already assigned to an address on the device
2346 if (idev
->rndid
[0] == 0xfd &&
2347 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
2348 (idev
->rndid
[7]&0x80))
2350 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
2351 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
2353 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
2358 static void ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
)
2360 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
2361 ipv6_regen_rndid(idev
);
2369 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, u32 metric
,
2370 struct net_device
*dev
, unsigned long expires
,
2371 u32 flags
, gfp_t gfp_flags
)
2373 struct fib6_config cfg
= {
2374 .fc_table
= l3mdev_fib_table(dev
) ? : RT6_TABLE_PREFIX
,
2375 .fc_metric
= metric
? : IP6_RT_PRIO_ADDRCONF
,
2376 .fc_ifindex
= dev
->ifindex
,
2377 .fc_expires
= expires
,
2379 .fc_flags
= RTF_UP
| flags
,
2380 .fc_nlinfo
.nl_net
= dev_net(dev
),
2381 .fc_protocol
= RTPROT_KERNEL
,
2382 .fc_type
= RTN_UNICAST
,
2387 /* Prevent useless cloning on PtP SIT.
2388 This thing is done here expecting that the whole
2389 class of non-broadcast devices need not cloning.
2391 #if IS_ENABLED(CONFIG_IPV6_SIT)
2392 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
2393 cfg
.fc_flags
|= RTF_NONEXTHOP
;
2396 ip6_route_add(&cfg
, gfp_flags
, NULL
);
2400 static struct fib6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
2402 const struct net_device
*dev
,
2403 u32 flags
, u32 noflags
,
2406 struct fib6_node
*fn
;
2407 struct fib6_info
*rt
= NULL
;
2408 struct fib6_table
*table
;
2409 u32 tb_id
= l3mdev_fib_table(dev
) ? : RT6_TABLE_PREFIX
;
2411 table
= fib6_get_table(dev_net(dev
), tb_id
);
2416 fn
= fib6_locate(&table
->tb6_root
, pfx
, plen
, NULL
, 0, true);
2420 for_each_fib6_node_rt_rcu(fn
) {
2421 /* prefix routes only use builtin fib6_nh */
2425 if (rt
->fib6_nh
->fib_nh_dev
->ifindex
!= dev
->ifindex
)
2427 if (no_gw
&& rt
->fib6_nh
->fib_nh_gw_family
)
2429 if ((rt
->fib6_flags
& flags
) != flags
)
2431 if ((rt
->fib6_flags
& noflags
) != 0)
2433 if (!fib6_info_hold_safe(rt
))
2443 /* Create "default" multicast route to the interface */
2445 static void addrconf_add_mroute(struct net_device
*dev
)
2447 struct fib6_config cfg
= {
2448 .fc_table
= l3mdev_fib_table(dev
) ? : RT6_TABLE_LOCAL
,
2449 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
2450 .fc_ifindex
= dev
->ifindex
,
2453 .fc_type
= RTN_UNICAST
,
2454 .fc_nlinfo
.nl_net
= dev_net(dev
),
2457 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
2459 ip6_route_add(&cfg
, GFP_KERNEL
, NULL
);
2462 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
2464 struct inet6_dev
*idev
;
2468 idev
= ipv6_find_idev(dev
);
2472 if (idev
->cnf
.disable_ipv6
)
2473 return ERR_PTR(-EACCES
);
2475 /* Add default multicast route */
2476 if (!(dev
->flags
& IFF_LOOPBACK
) && !netif_is_l3_master(dev
))
2477 addrconf_add_mroute(dev
);
2482 static void manage_tempaddrs(struct inet6_dev
*idev
,
2483 struct inet6_ifaddr
*ifp
,
2484 __u32 valid_lft
, __u32 prefered_lft
,
2485 bool create
, unsigned long now
)
2488 struct inet6_ifaddr
*ift
;
2490 read_lock_bh(&idev
->lock
);
2491 /* update all temporary addresses in the list */
2492 list_for_each_entry(ift
, &idev
->tempaddr_list
, tmp_list
) {
2493 int age
, max_valid
, max_prefered
;
2495 if (ifp
!= ift
->ifpub
)
2498 /* RFC 4941 section 3.3:
2499 * If a received option will extend the lifetime of a public
2500 * address, the lifetimes of temporary addresses should
2501 * be extended, subject to the overall constraint that no
2502 * temporary addresses should ever remain "valid" or "preferred"
2503 * for a time longer than (TEMP_VALID_LIFETIME) or
2504 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), respectively.
2506 age
= (now
- ift
->cstamp
) / HZ
;
2507 max_valid
= idev
->cnf
.temp_valid_lft
- age
;
2511 max_prefered
= idev
->cnf
.temp_prefered_lft
-
2512 idev
->desync_factor
- age
;
2513 if (max_prefered
< 0)
2516 if (valid_lft
> max_valid
)
2517 valid_lft
= max_valid
;
2519 if (prefered_lft
> max_prefered
)
2520 prefered_lft
= max_prefered
;
2522 spin_lock(&ift
->lock
);
2524 ift
->valid_lft
= valid_lft
;
2525 ift
->prefered_lft
= prefered_lft
;
2527 if (prefered_lft
> 0)
2528 ift
->flags
&= ~IFA_F_DEPRECATED
;
2530 spin_unlock(&ift
->lock
);
2531 if (!(flags
&IFA_F_TENTATIVE
))
2532 ipv6_ifa_notify(0, ift
);
2535 if ((create
|| list_empty(&idev
->tempaddr_list
)) &&
2536 idev
->cnf
.use_tempaddr
> 0) {
2537 /* When a new public address is created as described
2538 * in [ADDRCONF], also create a new temporary address.
2539 * Also create a temporary address if it's enabled but
2540 * no temporary address currently exists.
2542 read_unlock_bh(&idev
->lock
);
2543 ipv6_create_tempaddr(ifp
, NULL
, false);
2545 read_unlock_bh(&idev
->lock
);
2549 static bool is_addr_mode_generate_stable(struct inet6_dev
*idev
)
2551 return idev
->cnf
.addr_gen_mode
== IN6_ADDR_GEN_MODE_STABLE_PRIVACY
||
2552 idev
->cnf
.addr_gen_mode
== IN6_ADDR_GEN_MODE_RANDOM
;
2555 int addrconf_prefix_rcv_add_addr(struct net
*net
, struct net_device
*dev
,
2556 const struct prefix_info
*pinfo
,
2557 struct inet6_dev
*in6_dev
,
2558 const struct in6_addr
*addr
, int addr_type
,
2559 u32 addr_flags
, bool sllao
, bool tokenized
,
2560 __u32 valid_lft
, u32 prefered_lft
)
2562 struct inet6_ifaddr
*ifp
= ipv6_get_ifaddr(net
, addr
, dev
, 1);
2563 int create
= 0, update_lft
= 0;
2565 if (!ifp
&& valid_lft
) {
2566 int max_addresses
= in6_dev
->cnf
.max_addresses
;
2567 struct ifa6_config cfg
= {
2569 .plen
= pinfo
->prefix_len
,
2570 .ifa_flags
= addr_flags
,
2571 .valid_lft
= valid_lft
,
2572 .preferred_lft
= prefered_lft
,
2573 .scope
= addr_type
& IPV6_ADDR_SCOPE_MASK
,
2576 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2577 if ((net
->ipv6
.devconf_all
->optimistic_dad
||
2578 in6_dev
->cnf
.optimistic_dad
) &&
2579 !net
->ipv6
.devconf_all
->forwarding
&& sllao
)
2580 cfg
.ifa_flags
|= IFA_F_OPTIMISTIC
;
2583 /* Do not allow to create too much of autoconfigured
2584 * addresses; this would be too easy way to crash kernel.
2586 if (!max_addresses
||
2587 ipv6_count_addresses(in6_dev
) < max_addresses
)
2588 ifp
= ipv6_add_addr(in6_dev
, &cfg
, false, NULL
);
2590 if (IS_ERR_OR_NULL(ifp
))
2594 spin_lock_bh(&ifp
->lock
);
2595 ifp
->flags
|= IFA_F_MANAGETEMPADDR
;
2596 ifp
->cstamp
= jiffies
;
2597 ifp
->tokenized
= tokenized
;
2598 spin_unlock_bh(&ifp
->lock
);
2599 addrconf_dad_start(ifp
);
2607 /* update lifetime (RFC2462 5.5.3 e) */
2608 spin_lock_bh(&ifp
->lock
);
2610 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
2611 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
2614 if (!create
&& stored_lft
) {
2615 const u32 minimum_lft
= min_t(u32
,
2616 stored_lft
, MIN_VALID_LIFETIME
);
2617 valid_lft
= max(valid_lft
, minimum_lft
);
2619 /* RFC4862 Section 5.5.3e:
2620 * "Note that the preferred lifetime of the
2621 * corresponding address is always reset to
2622 * the Preferred Lifetime in the received
2623 * Prefix Information option, regardless of
2624 * whether the valid lifetime is also reset or
2627 * So we should always update prefered_lft here.
2633 ifp
->valid_lft
= valid_lft
;
2634 ifp
->prefered_lft
= prefered_lft
;
2637 ifp
->flags
&= ~IFA_F_DEPRECATED
;
2638 spin_unlock_bh(&ifp
->lock
);
2640 if (!(flags
&IFA_F_TENTATIVE
))
2641 ipv6_ifa_notify(0, ifp
);
2643 spin_unlock_bh(&ifp
->lock
);
2645 manage_tempaddrs(in6_dev
, ifp
, valid_lft
, prefered_lft
,
2654 EXPORT_SYMBOL_GPL(addrconf_prefix_rcv_add_addr
);
2656 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
, bool sllao
)
2658 struct prefix_info
*pinfo
;
2663 struct inet6_dev
*in6_dev
;
2664 struct net
*net
= dev_net(dev
);
2666 pinfo
= (struct prefix_info
*) opt
;
2668 if (len
< sizeof(struct prefix_info
)) {
2669 netdev_dbg(dev
, "addrconf: prefix option too short\n");
2674 * Validation checks ([ADDRCONF], page 19)
2677 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
2679 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
2682 valid_lft
= ntohl(pinfo
->valid
);
2683 prefered_lft
= ntohl(pinfo
->prefered
);
2685 if (prefered_lft
> valid_lft
) {
2686 net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n");
2690 in6_dev
= in6_dev_get(dev
);
2693 net_dbg_ratelimited("addrconf: device %s not configured\n",
2699 * Two things going on here:
2700 * 1) Add routes for on-link prefixes
2701 * 2) Configure prefixes with the auto flag set
2704 if (pinfo
->onlink
) {
2705 struct fib6_info
*rt
;
2706 unsigned long rt_expires
;
2708 /* Avoid arithmetic overflow. Really, we could
2709 * save rt_expires in seconds, likely valid_lft,
2710 * but it would require division in fib gc, that it
2714 rt_expires
= addrconf_timeout_fixup(valid_lft
, HZ
);
2716 rt_expires
= addrconf_timeout_fixup(valid_lft
, USER_HZ
);
2718 if (addrconf_finite_timeout(rt_expires
))
2721 rt
= addrconf_get_prefix_route(&pinfo
->prefix
,
2724 RTF_ADDRCONF
| RTF_PREFIX_RT
,
2728 /* Autoconf prefix route */
2729 if (valid_lft
== 0) {
2730 ip6_del_rt(net
, rt
);
2732 } else if (addrconf_finite_timeout(rt_expires
)) {
2734 fib6_set_expires(rt
, jiffies
+ rt_expires
);
2736 fib6_clean_expires(rt
);
2738 } else if (valid_lft
) {
2739 clock_t expires
= 0;
2740 int flags
= RTF_ADDRCONF
| RTF_PREFIX_RT
;
2741 if (addrconf_finite_timeout(rt_expires
)) {
2743 flags
|= RTF_EXPIRES
;
2744 expires
= jiffies_to_clock_t(rt_expires
);
2746 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
2747 0, dev
, expires
, flags
,
2750 fib6_info_release(rt
);
2753 /* Try to figure out our local address for this prefix */
2755 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
2756 struct in6_addr addr
;
2757 bool tokenized
= false, dev_addr_generated
= false;
2759 if (pinfo
->prefix_len
== 64) {
2760 memcpy(&addr
, &pinfo
->prefix
, 8);
2762 if (!ipv6_addr_any(&in6_dev
->token
)) {
2763 read_lock_bh(&in6_dev
->lock
);
2764 memcpy(addr
.s6_addr
+ 8,
2765 in6_dev
->token
.s6_addr
+ 8, 8);
2766 read_unlock_bh(&in6_dev
->lock
);
2768 } else if (is_addr_mode_generate_stable(in6_dev
) &&
2769 !ipv6_generate_stable_address(&addr
, 0,
2771 addr_flags
|= IFA_F_STABLE_PRIVACY
;
2773 } else if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
2774 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
2777 dev_addr_generated
= true;
2781 net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n",
2786 err
= addrconf_prefix_rcv_add_addr(net
, dev
, pinfo
, in6_dev
,
2789 tokenized
, valid_lft
,
2794 /* Ignore error case here because previous prefix add addr was
2795 * successful which will be notified.
2797 ndisc_ops_prefix_rcv_add_addr(net
, dev
, pinfo
, in6_dev
, &addr
,
2798 addr_type
, addr_flags
, sllao
,
2799 tokenized
, valid_lft
,
2801 dev_addr_generated
);
2803 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
2805 in6_dev_put(in6_dev
);
2809 * Set destination address.
2810 * Special case for SIT interfaces where we create a new "virtual"
2813 int addrconf_set_dstaddr(struct net
*net
, void __user
*arg
)
2815 struct in6_ifreq ireq
;
2816 struct net_device
*dev
;
2822 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2825 dev
= __dev_get_by_index(net
, ireq
.ifr6_ifindex
);
2831 #if IS_ENABLED(CONFIG_IPV6_SIT)
2832 if (dev
->type
== ARPHRD_SIT
) {
2833 const struct net_device_ops
*ops
= dev
->netdev_ops
;
2835 struct ip_tunnel_parm p
;
2837 err
= -EADDRNOTAVAIL
;
2838 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
2841 memset(&p
, 0, sizeof(p
));
2842 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
2846 p
.iph
.protocol
= IPPROTO_IPV6
;
2848 ifr
.ifr_ifru
.ifru_data
= (__force
void __user
*)&p
;
2850 if (ops
->ndo_do_ioctl
) {
2851 mm_segment_t oldfs
= get_fs();
2854 err
= ops
->ndo_do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
2861 dev
= __dev_get_by_name(net
, p
.name
);
2864 err
= dev_open(dev
, NULL
);
2874 static int ipv6_mc_config(struct sock
*sk
, bool join
,
2875 const struct in6_addr
*addr
, int ifindex
)
2883 ret
= ipv6_sock_mc_join(sk
, ifindex
, addr
);
2885 ret
= ipv6_sock_mc_drop(sk
, ifindex
, addr
);
2892 * Manual configuration of address on an interface
2894 static int inet6_addr_add(struct net
*net
, int ifindex
,
2895 struct ifa6_config
*cfg
,
2896 struct netlink_ext_ack
*extack
)
2898 struct inet6_ifaddr
*ifp
;
2899 struct inet6_dev
*idev
;
2900 struct net_device
*dev
;
2901 unsigned long timeout
;
2907 if (cfg
->plen
> 128)
2910 /* check the lifetime */
2911 if (!cfg
->valid_lft
|| cfg
->preferred_lft
> cfg
->valid_lft
)
2914 if (cfg
->ifa_flags
& IFA_F_MANAGETEMPADDR
&& cfg
->plen
!= 64)
2917 dev
= __dev_get_by_index(net
, ifindex
);
2921 idev
= addrconf_add_dev(dev
);
2923 return PTR_ERR(idev
);
2925 if (cfg
->ifa_flags
& IFA_F_MCAUTOJOIN
) {
2926 int ret
= ipv6_mc_config(net
->ipv6
.mc_autojoin_sk
,
2927 true, cfg
->pfx
, ifindex
);
2933 cfg
->scope
= ipv6_addr_scope(cfg
->pfx
);
2935 timeout
= addrconf_timeout_fixup(cfg
->valid_lft
, HZ
);
2936 if (addrconf_finite_timeout(timeout
)) {
2937 expires
= jiffies_to_clock_t(timeout
* HZ
);
2938 cfg
->valid_lft
= timeout
;
2939 flags
= RTF_EXPIRES
;
2943 cfg
->ifa_flags
|= IFA_F_PERMANENT
;
2946 timeout
= addrconf_timeout_fixup(cfg
->preferred_lft
, HZ
);
2947 if (addrconf_finite_timeout(timeout
)) {
2949 cfg
->ifa_flags
|= IFA_F_DEPRECATED
;
2950 cfg
->preferred_lft
= timeout
;
2953 ifp
= ipv6_add_addr(idev
, cfg
, true, extack
);
2955 if (!(cfg
->ifa_flags
& IFA_F_NOPREFIXROUTE
)) {
2956 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
,
2957 ifp
->rt_priority
, dev
, expires
,
2961 /* Send a netlink notification if DAD is enabled and
2962 * optimistic flag is not set
2964 if (!(ifp
->flags
& (IFA_F_OPTIMISTIC
| IFA_F_NODAD
)))
2965 ipv6_ifa_notify(0, ifp
);
2967 * Note that section 3.1 of RFC 4429 indicates
2968 * that the Optimistic flag should not be set for
2969 * manually configured addresses
2971 addrconf_dad_start(ifp
);
2972 if (cfg
->ifa_flags
& IFA_F_MANAGETEMPADDR
)
2973 manage_tempaddrs(idev
, ifp
, cfg
->valid_lft
,
2974 cfg
->preferred_lft
, true, jiffies
);
2976 addrconf_verify_rtnl();
2978 } else if (cfg
->ifa_flags
& IFA_F_MCAUTOJOIN
) {
2979 ipv6_mc_config(net
->ipv6
.mc_autojoin_sk
, false,
2983 return PTR_ERR(ifp
);
2986 static int inet6_addr_del(struct net
*net
, int ifindex
, u32 ifa_flags
,
2987 const struct in6_addr
*pfx
, unsigned int plen
)
2989 struct inet6_ifaddr
*ifp
;
2990 struct inet6_dev
*idev
;
2991 struct net_device
*dev
;
2996 dev
= __dev_get_by_index(net
, ifindex
);
3000 idev
= __in6_dev_get(dev
);
3004 read_lock_bh(&idev
->lock
);
3005 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
3006 if (ifp
->prefix_len
== plen
&&
3007 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
3009 read_unlock_bh(&idev
->lock
);
3011 if (!(ifp
->flags
& IFA_F_TEMPORARY
) &&
3012 (ifa_flags
& IFA_F_MANAGETEMPADDR
))
3013 manage_tempaddrs(idev
, ifp
, 0, 0, false,
3016 addrconf_verify_rtnl();
3017 if (ipv6_addr_is_multicast(pfx
)) {
3018 ipv6_mc_config(net
->ipv6
.mc_autojoin_sk
,
3019 false, pfx
, dev
->ifindex
);
3024 read_unlock_bh(&idev
->lock
);
3025 return -EADDRNOTAVAIL
;
3029 int addrconf_add_ifaddr(struct net
*net
, void __user
*arg
)
3031 struct ifa6_config cfg
= {
3032 .ifa_flags
= IFA_F_PERMANENT
,
3033 .preferred_lft
= INFINITY_LIFE_TIME
,
3034 .valid_lft
= INFINITY_LIFE_TIME
,
3036 struct in6_ifreq ireq
;
3039 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
3042 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
3045 cfg
.pfx
= &ireq
.ifr6_addr
;
3046 cfg
.plen
= ireq
.ifr6_prefixlen
;
3049 err
= inet6_addr_add(net
, ireq
.ifr6_ifindex
, &cfg
, NULL
);
3054 int addrconf_del_ifaddr(struct net
*net
, void __user
*arg
)
3056 struct in6_ifreq ireq
;
3059 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
3062 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
3066 err
= inet6_addr_del(net
, ireq
.ifr6_ifindex
, 0, &ireq
.ifr6_addr
,
3067 ireq
.ifr6_prefixlen
);
3072 static void add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
3073 int plen
, int scope
)
3075 struct inet6_ifaddr
*ifp
;
3076 struct ifa6_config cfg
= {
3079 .ifa_flags
= IFA_F_PERMANENT
,
3080 .valid_lft
= INFINITY_LIFE_TIME
,
3081 .preferred_lft
= INFINITY_LIFE_TIME
,
3085 ifp
= ipv6_add_addr(idev
, &cfg
, true, NULL
);
3087 spin_lock_bh(&ifp
->lock
);
3088 ifp
->flags
&= ~IFA_F_TENTATIVE
;
3089 spin_unlock_bh(&ifp
->lock
);
3090 rt_genid_bump_ipv6(dev_net(idev
->dev
));
3091 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
3096 #if IS_ENABLED(CONFIG_IPV6_SIT)
3097 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
3099 struct in6_addr addr
;
3100 struct net_device
*dev
;
3101 struct net
*net
= dev_net(idev
->dev
);
3107 memset(&addr
, 0, sizeof(struct in6_addr
));
3108 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
3110 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
3111 addr
.s6_addr32
[0] = htonl(0xfe800000);
3115 scope
= IPV6_ADDR_COMPATv4
;
3117 pflags
|= RTF_NONEXTHOP
;
3120 if (addr
.s6_addr32
[3]) {
3121 add_addr(idev
, &addr
, plen
, scope
);
3122 addrconf_prefix_route(&addr
, plen
, 0, idev
->dev
, 0, pflags
,
3127 for_each_netdev(net
, dev
) {
3128 struct in_device
*in_dev
= __in_dev_get_rtnl(dev
);
3129 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
3130 struct in_ifaddr
*ifa
;
3133 in_dev_for_each_ifa_rtnl(ifa
, in_dev
) {
3134 addr
.s6_addr32
[3] = ifa
->ifa_local
;
3136 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
3138 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
3139 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
3144 add_addr(idev
, &addr
, plen
, flag
);
3145 addrconf_prefix_route(&addr
, plen
, 0, idev
->dev
,
3146 0, pflags
, GFP_KERNEL
);
3153 static void init_loopback(struct net_device
*dev
)
3155 struct inet6_dev
*idev
;
3161 idev
= ipv6_find_idev(dev
);
3163 pr_debug("%s: add_dev failed\n", __func__
);
3167 add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
);
3170 void addrconf_add_linklocal(struct inet6_dev
*idev
,
3171 const struct in6_addr
*addr
, u32 flags
)
3173 struct ifa6_config cfg
= {
3176 .ifa_flags
= flags
| IFA_F_PERMANENT
,
3177 .valid_lft
= INFINITY_LIFE_TIME
,
3178 .preferred_lft
= INFINITY_LIFE_TIME
,
3181 struct inet6_ifaddr
*ifp
;
3183 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3184 if ((dev_net(idev
->dev
)->ipv6
.devconf_all
->optimistic_dad
||
3185 idev
->cnf
.optimistic_dad
) &&
3186 !dev_net(idev
->dev
)->ipv6
.devconf_all
->forwarding
)
3187 cfg
.ifa_flags
|= IFA_F_OPTIMISTIC
;
3190 ifp
= ipv6_add_addr(idev
, &cfg
, true, NULL
);
3192 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, 0, idev
->dev
,
3194 addrconf_dad_start(ifp
);
3198 EXPORT_SYMBOL_GPL(addrconf_add_linklocal
);
3200 static bool ipv6_reserved_interfaceid(struct in6_addr address
)
3202 if ((address
.s6_addr32
[2] | address
.s6_addr32
[3]) == 0)
3205 if (address
.s6_addr32
[2] == htonl(0x02005eff) &&
3206 ((address
.s6_addr32
[3] & htonl(0xfe000000)) == htonl(0xfe000000)))
3209 if (address
.s6_addr32
[2] == htonl(0xfdffffff) &&
3210 ((address
.s6_addr32
[3] & htonl(0xffffff80)) == htonl(0xffffff80)))
3216 static int ipv6_generate_stable_address(struct in6_addr
*address
,
3218 const struct inet6_dev
*idev
)
3220 static DEFINE_SPINLOCK(lock
);
3221 static __u32 digest
[SHA_DIGEST_WORDS
];
3222 static __u32 workspace
[SHA_WORKSPACE_WORDS
];
3225 char __data
[SHA_MESSAGE_BYTES
];
3227 struct in6_addr secret
;
3229 unsigned char hwaddr
[MAX_ADDR_LEN
];
3234 struct in6_addr secret
;
3235 struct in6_addr temp
;
3236 struct net
*net
= dev_net(idev
->dev
);
3238 BUILD_BUG_ON(sizeof(data
.__data
) != sizeof(data
));
3240 if (idev
->cnf
.stable_secret
.initialized
)
3241 secret
= idev
->cnf
.stable_secret
.secret
;
3242 else if (net
->ipv6
.devconf_dflt
->stable_secret
.initialized
)
3243 secret
= net
->ipv6
.devconf_dflt
->stable_secret
.secret
;
3248 spin_lock_bh(&lock
);
3251 memset(&data
, 0, sizeof(data
));
3252 memset(workspace
, 0, sizeof(workspace
));
3253 memcpy(data
.hwaddr
, idev
->dev
->perm_addr
, idev
->dev
->addr_len
);
3254 data
.prefix
[0] = address
->s6_addr32
[0];
3255 data
.prefix
[1] = address
->s6_addr32
[1];
3256 data
.secret
= secret
;
3257 data
.dad_count
= dad_count
;
3259 sha_transform(digest
, data
.__data
, workspace
);
3262 temp
.s6_addr32
[2] = (__force __be32
)digest
[0];
3263 temp
.s6_addr32
[3] = (__force __be32
)digest
[1];
3265 spin_unlock_bh(&lock
);
3267 if (ipv6_reserved_interfaceid(temp
)) {
3269 if (dad_count
> dev_net(idev
->dev
)->ipv6
.sysctl
.idgen_retries
)
3278 static void ipv6_gen_mode_random_init(struct inet6_dev
*idev
)
3280 struct ipv6_stable_secret
*s
= &idev
->cnf
.stable_secret
;
3284 s
= &idev
->cnf
.stable_secret
;
3285 get_random_bytes(&s
->secret
, sizeof(s
->secret
));
3286 s
->initialized
= true;
3289 static void addrconf_addr_gen(struct inet6_dev
*idev
, bool prefix_route
)
3291 struct in6_addr addr
;
3293 /* no link local addresses on L3 master devices */
3294 if (netif_is_l3_master(idev
->dev
))
3297 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
3299 switch (idev
->cnf
.addr_gen_mode
) {
3300 case IN6_ADDR_GEN_MODE_RANDOM
:
3301 ipv6_gen_mode_random_init(idev
);
3303 case IN6_ADDR_GEN_MODE_STABLE_PRIVACY
:
3304 if (!ipv6_generate_stable_address(&addr
, 0, idev
))
3305 addrconf_add_linklocal(idev
, &addr
,
3306 IFA_F_STABLE_PRIVACY
);
3307 else if (prefix_route
)
3308 addrconf_prefix_route(&addr
, 64, 0, idev
->dev
,
3311 case IN6_ADDR_GEN_MODE_EUI64
:
3312 /* addrconf_add_linklocal also adds a prefix_route and we
3313 * only need to care about prefix routes if ipv6_generate_eui64
3314 * couldn't generate one.
3316 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) == 0)
3317 addrconf_add_linklocal(idev
, &addr
, 0);
3318 else if (prefix_route
)
3319 addrconf_prefix_route(&addr
, 64, 0, idev
->dev
,
3322 case IN6_ADDR_GEN_MODE_NONE
:
3324 /* will not add any link local address */
3329 static void addrconf_dev_config(struct net_device
*dev
)
3331 struct inet6_dev
*idev
;
3335 if ((dev
->type
!= ARPHRD_ETHER
) &&
3336 (dev
->type
!= ARPHRD_FDDI
) &&
3337 (dev
->type
!= ARPHRD_ARCNET
) &&
3338 (dev
->type
!= ARPHRD_INFINIBAND
) &&
3339 (dev
->type
!= ARPHRD_IEEE1394
) &&
3340 (dev
->type
!= ARPHRD_TUNNEL6
) &&
3341 (dev
->type
!= ARPHRD_6LOWPAN
) &&
3342 (dev
->type
!= ARPHRD_IP6GRE
) &&
3343 (dev
->type
!= ARPHRD_IPGRE
) &&
3344 (dev
->type
!= ARPHRD_TUNNEL
) &&
3345 (dev
->type
!= ARPHRD_NONE
) &&
3346 (dev
->type
!= ARPHRD_RAWIP
)) {
3347 /* Alas, we support only Ethernet autoconfiguration. */
3351 idev
= addrconf_add_dev(dev
);
3355 /* this device type has no EUI support */
3356 if (dev
->type
== ARPHRD_NONE
&&
3357 idev
->cnf
.addr_gen_mode
== IN6_ADDR_GEN_MODE_EUI64
)
3358 idev
->cnf
.addr_gen_mode
= IN6_ADDR_GEN_MODE_RANDOM
;
3360 addrconf_addr_gen(idev
, false);
3363 #if IS_ENABLED(CONFIG_IPV6_SIT)
3364 static void addrconf_sit_config(struct net_device
*dev
)
3366 struct inet6_dev
*idev
;
3371 * Configure the tunnel with one of our IPv4
3372 * addresses... we should configure all of
3373 * our v4 addrs in the tunnel
3376 idev
= ipv6_find_idev(dev
);
3378 pr_debug("%s: add_dev failed\n", __func__
);
3382 if (dev
->priv_flags
& IFF_ISATAP
) {
3383 addrconf_addr_gen(idev
, false);
3387 sit_add_v4_addrs(idev
);
3389 if (dev
->flags
&IFF_POINTOPOINT
)
3390 addrconf_add_mroute(dev
);
3394 #if IS_ENABLED(CONFIG_NET_IPGRE)
3395 static void addrconf_gre_config(struct net_device
*dev
)
3397 struct inet6_dev
*idev
;
3401 idev
= ipv6_find_idev(dev
);
3403 pr_debug("%s: add_dev failed\n", __func__
);
3407 addrconf_addr_gen(idev
, true);
3408 if (dev
->flags
& IFF_POINTOPOINT
)
3409 addrconf_add_mroute(dev
);
3413 static int fixup_permanent_addr(struct net
*net
,
3414 struct inet6_dev
*idev
,
3415 struct inet6_ifaddr
*ifp
)
3417 /* !fib6_node means the host route was removed from the
3418 * FIB, for example, if 'lo' device is taken down. In that
3419 * case regenerate the host route.
3421 if (!ifp
->rt
|| !ifp
->rt
->fib6_node
) {
3422 struct fib6_info
*f6i
, *prev
;
3424 f6i
= addrconf_f6i_alloc(net
, idev
, &ifp
->addr
, false,
3427 return PTR_ERR(f6i
);
3429 /* ifp->rt can be accessed outside of rtnl */
3430 spin_lock(&ifp
->lock
);
3433 spin_unlock(&ifp
->lock
);
3435 fib6_info_release(prev
);
3438 if (!(ifp
->flags
& IFA_F_NOPREFIXROUTE
)) {
3439 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
,
3440 ifp
->rt_priority
, idev
->dev
, 0, 0,
3444 if (ifp
->state
== INET6_IFADDR_STATE_PREDAD
)
3445 addrconf_dad_start(ifp
);
3450 static void addrconf_permanent_addr(struct net
*net
, struct net_device
*dev
)
3452 struct inet6_ifaddr
*ifp
, *tmp
;
3453 struct inet6_dev
*idev
;
3455 idev
= __in6_dev_get(dev
);
3459 write_lock_bh(&idev
->lock
);
3461 list_for_each_entry_safe(ifp
, tmp
, &idev
->addr_list
, if_list
) {
3462 if ((ifp
->flags
& IFA_F_PERMANENT
) &&
3463 fixup_permanent_addr(net
, idev
, ifp
) < 0) {
3464 write_unlock_bh(&idev
->lock
);
3467 write_lock_bh(&idev
->lock
);
3469 net_info_ratelimited("%s: Failed to add prefix route for address %pI6c; dropping\n",
3470 idev
->dev
->name
, &ifp
->addr
);
3474 write_unlock_bh(&idev
->lock
);
3477 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
3480 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
3481 struct netdev_notifier_change_info
*change_info
;
3482 struct netdev_notifier_changeupper_info
*info
;
3483 struct inet6_dev
*idev
= __in6_dev_get(dev
);
3484 struct net
*net
= dev_net(dev
);
3485 int run_pending
= 0;
3489 case NETDEV_REGISTER
:
3490 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
3491 idev
= ipv6_add_dev(dev
);
3493 return notifier_from_errno(PTR_ERR(idev
));
3497 case NETDEV_CHANGEMTU
:
3498 /* if MTU under IPV6_MIN_MTU stop IPv6 on this interface. */
3499 if (dev
->mtu
< IPV6_MIN_MTU
) {
3500 addrconf_ifdown(dev
, dev
!= net
->loopback_dev
);
3505 rt6_mtu_change(dev
, dev
->mtu
);
3506 idev
->cnf
.mtu6
= dev
->mtu
;
3510 /* allocate new idev */
3511 idev
= ipv6_add_dev(dev
);
3515 /* device is still not ready */
3516 if (!(idev
->if_flags
& IF_READY
))
3525 if (dev
->flags
& IFF_SLAVE
)
3528 if (idev
&& idev
->cnf
.disable_ipv6
)
3531 if (event
== NETDEV_UP
) {
3532 /* restore routes for permanent addresses */
3533 addrconf_permanent_addr(net
, dev
);
3535 if (!addrconf_link_ready(dev
)) {
3536 /* device is not ready yet. */
3537 pr_debug("ADDRCONF(NETDEV_UP): %s: link is not ready\n",
3542 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
3543 idev
= ipv6_add_dev(dev
);
3545 if (!IS_ERR_OR_NULL(idev
)) {
3546 idev
->if_flags
|= IF_READY
;
3549 } else if (event
== NETDEV_CHANGE
) {
3550 if (!addrconf_link_ready(dev
)) {
3551 /* device is still not ready. */
3552 rt6_sync_down_dev(dev
, event
);
3556 if (!IS_ERR_OR_NULL(idev
)) {
3557 if (idev
->if_flags
& IF_READY
) {
3558 /* device is already configured -
3559 * but resend MLD reports, we might
3560 * have roamed and need to update
3561 * multicast snooping switches
3565 if (change_info
->flags_changed
& IFF_NOARP
)
3566 addrconf_dad_run(idev
, true);
3567 rt6_sync_up(dev
, RTNH_F_LINKDOWN
);
3570 idev
->if_flags
|= IF_READY
;
3573 pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n",
3579 switch (dev
->type
) {
3580 #if IS_ENABLED(CONFIG_IPV6_SIT)
3582 addrconf_sit_config(dev
);
3585 #if IS_ENABLED(CONFIG_NET_IPGRE)
3587 addrconf_gre_config(dev
);
3590 case ARPHRD_LOOPBACK
:
3595 addrconf_dev_config(dev
);
3599 if (!IS_ERR_OR_NULL(idev
)) {
3601 addrconf_dad_run(idev
, false);
3603 /* Device has an address by now */
3604 rt6_sync_up(dev
, RTNH_F_DEAD
);
3607 * If the MTU changed during the interface down,
3608 * when the interface up, the changed MTU must be
3609 * reflected in the idev as well as routers.
3611 if (idev
->cnf
.mtu6
!= dev
->mtu
&&
3612 dev
->mtu
>= IPV6_MIN_MTU
) {
3613 rt6_mtu_change(dev
, dev
->mtu
);
3614 idev
->cnf
.mtu6
= dev
->mtu
;
3616 idev
->tstamp
= jiffies
;
3617 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
3620 * If the changed mtu during down is lower than
3621 * IPV6_MIN_MTU stop IPv6 on this interface.
3623 if (dev
->mtu
< IPV6_MIN_MTU
)
3624 addrconf_ifdown(dev
, dev
!= net
->loopback_dev
);
3629 case NETDEV_UNREGISTER
:
3631 * Remove all addresses from this interface.
3633 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
3636 case NETDEV_CHANGENAME
:
3638 snmp6_unregister_dev(idev
);
3639 addrconf_sysctl_unregister(idev
);
3640 err
= addrconf_sysctl_register(idev
);
3642 return notifier_from_errno(err
);
3643 err
= snmp6_register_dev(idev
);
3645 addrconf_sysctl_unregister(idev
);
3646 return notifier_from_errno(err
);
3651 case NETDEV_PRE_TYPE_CHANGE
:
3652 case NETDEV_POST_TYPE_CHANGE
:
3654 addrconf_type_change(dev
, event
);
3657 case NETDEV_CHANGEUPPER
:
3660 /* flush all routes if dev is linked to or unlinked from
3661 * an L3 master device (e.g., VRF)
3663 if (info
->upper_dev
&& netif_is_l3_master(info
->upper_dev
))
3664 addrconf_ifdown(dev
, 0);
3671 * addrconf module should be notified of a device going up
3673 static struct notifier_block ipv6_dev_notf
= {
3674 .notifier_call
= addrconf_notify
,
3675 .priority
= ADDRCONF_NOTIFY_PRIORITY
,
3678 static void addrconf_type_change(struct net_device
*dev
, unsigned long event
)
3680 struct inet6_dev
*idev
;
3683 idev
= __in6_dev_get(dev
);
3685 if (event
== NETDEV_POST_TYPE_CHANGE
)
3686 ipv6_mc_remap(idev
);
3687 else if (event
== NETDEV_PRE_TYPE_CHANGE
)
3688 ipv6_mc_unmap(idev
);
3691 static bool addr_is_local(const struct in6_addr
*addr
)
3693 return ipv6_addr_type(addr
) &
3694 (IPV6_ADDR_LINKLOCAL
| IPV6_ADDR_LOOPBACK
);
3697 static int addrconf_ifdown(struct net_device
*dev
, int how
)
3699 unsigned long event
= how
? NETDEV_UNREGISTER
: NETDEV_DOWN
;
3700 struct net
*net
= dev_net(dev
);
3701 struct inet6_dev
*idev
;
3702 struct inet6_ifaddr
*ifa
, *tmp
;
3703 bool keep_addr
= false;
3708 rt6_disable_ip(dev
, event
);
3710 idev
= __in6_dev_get(dev
);
3715 * Step 1: remove reference to ipv6 device from parent device.
3721 /* protected by rtnl_lock */
3722 RCU_INIT_POINTER(dev
->ip6_ptr
, NULL
);
3724 /* Step 1.5: remove snmp6 entry */
3725 snmp6_unregister_dev(idev
);
3729 /* combine the user config with event to determine if permanent
3730 * addresses are to be removed from address hash table
3732 if (!how
&& !idev
->cnf
.disable_ipv6
) {
3733 /* aggregate the system setting and interface setting */
3734 int _keep_addr
= net
->ipv6
.devconf_all
->keep_addr_on_down
;
3737 _keep_addr
= idev
->cnf
.keep_addr_on_down
;
3739 keep_addr
= (_keep_addr
> 0);
3742 /* Step 2: clear hash table */
3743 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
3744 struct hlist_head
*h
= &inet6_addr_lst
[i
];
3746 spin_lock_bh(&addrconf_hash_lock
);
3748 hlist_for_each_entry_rcu(ifa
, h
, addr_lst
) {
3749 if (ifa
->idev
== idev
) {
3750 addrconf_del_dad_work(ifa
);
3751 /* combined flag + permanent flag decide if
3752 * address is retained on a down event
3755 !(ifa
->flags
& IFA_F_PERMANENT
) ||
3756 addr_is_local(&ifa
->addr
)) {
3757 hlist_del_init_rcu(&ifa
->addr_lst
);
3762 spin_unlock_bh(&addrconf_hash_lock
);
3765 write_lock_bh(&idev
->lock
);
3767 addrconf_del_rs_timer(idev
);
3769 /* Step 2: clear flags for stateless addrconf */
3771 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
3773 /* Step 3: clear tempaddr list */
3774 while (!list_empty(&idev
->tempaddr_list
)) {
3775 ifa
= list_first_entry(&idev
->tempaddr_list
,
3776 struct inet6_ifaddr
, tmp_list
);
3777 list_del(&ifa
->tmp_list
);
3778 write_unlock_bh(&idev
->lock
);
3779 spin_lock_bh(&ifa
->lock
);
3782 in6_ifa_put(ifa
->ifpub
);
3785 spin_unlock_bh(&ifa
->lock
);
3787 write_lock_bh(&idev
->lock
);
3790 list_for_each_entry_safe(ifa
, tmp
, &idev
->addr_list
, if_list
) {
3791 struct fib6_info
*rt
= NULL
;
3794 addrconf_del_dad_work(ifa
);
3796 keep
= keep_addr
&& (ifa
->flags
& IFA_F_PERMANENT
) &&
3797 !addr_is_local(&ifa
->addr
);
3799 write_unlock_bh(&idev
->lock
);
3800 spin_lock_bh(&ifa
->lock
);
3803 /* set state to skip the notifier below */
3804 state
= INET6_IFADDR_STATE_DEAD
;
3805 ifa
->state
= INET6_IFADDR_STATE_PREDAD
;
3806 if (!(ifa
->flags
& IFA_F_NODAD
))
3807 ifa
->flags
|= IFA_F_TENTATIVE
;
3813 ifa
->state
= INET6_IFADDR_STATE_DEAD
;
3816 spin_unlock_bh(&ifa
->lock
);
3819 ip6_del_rt(net
, rt
);
3821 if (state
!= INET6_IFADDR_STATE_DEAD
) {
3822 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
3823 inet6addr_notifier_call_chain(NETDEV_DOWN
, ifa
);
3825 if (idev
->cnf
.forwarding
)
3826 addrconf_leave_anycast(ifa
);
3827 addrconf_leave_solict(ifa
->idev
, &ifa
->addr
);
3830 write_lock_bh(&idev
->lock
);
3832 list_del_rcu(&ifa
->if_list
);
3837 write_unlock_bh(&idev
->lock
);
3839 /* Step 5: Discard anycast and multicast list */
3841 ipv6_ac_destroy_dev(idev
);
3842 ipv6_mc_destroy_dev(idev
);
3847 idev
->tstamp
= jiffies
;
3849 /* Last: Shot the device (if unregistered) */
3851 addrconf_sysctl_unregister(idev
);
3852 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
3853 neigh_ifdown(&nd_tbl
, dev
);
3859 static void addrconf_rs_timer(struct timer_list
*t
)
3861 struct inet6_dev
*idev
= from_timer(idev
, t
, rs_timer
);
3862 struct net_device
*dev
= idev
->dev
;
3863 struct in6_addr lladdr
;
3865 write_lock(&idev
->lock
);
3866 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
))
3869 if (!ipv6_accept_ra(idev
))
3872 /* Announcement received after solicitation was sent */
3873 if (idev
->if_flags
& IF_RA_RCVD
)
3876 if (idev
->rs_probes
++ < idev
->cnf
.rtr_solicits
|| idev
->cnf
.rtr_solicits
< 0) {
3877 write_unlock(&idev
->lock
);
3878 if (!ipv6_get_lladdr(dev
, &lladdr
, IFA_F_TENTATIVE
))
3879 ndisc_send_rs(dev
, &lladdr
,
3880 &in6addr_linklocal_allrouters
);
3884 write_lock(&idev
->lock
);
3885 idev
->rs_interval
= rfc3315_s14_backoff_update(
3886 idev
->rs_interval
, idev
->cnf
.rtr_solicit_max_interval
);
3887 /* The wait after the last probe can be shorter */
3888 addrconf_mod_rs_timer(idev
, (idev
->rs_probes
==
3889 idev
->cnf
.rtr_solicits
) ?
3890 idev
->cnf
.rtr_solicit_delay
:
3894 * Note: we do not support deprecated "all on-link"
3895 * assumption any longer.
3897 pr_debug("%s: no IPv6 routers present\n", idev
->dev
->name
);
3901 write_unlock(&idev
->lock
);
3907 * Duplicate Address Detection
3909 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
3911 unsigned long rand_num
;
3912 struct inet6_dev
*idev
= ifp
->idev
;
3915 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
3918 rand_num
= prandom_u32() % (idev
->cnf
.rtr_solicit_delay
? : 1);
3921 if (idev
->cnf
.enhanced_dad
||
3922 dev_net(idev
->dev
)->ipv6
.devconf_all
->enhanced_dad
) {
3924 get_random_bytes(&nonce
, 6);
3927 ifp
->dad_nonce
= nonce
;
3928 ifp
->dad_probes
= idev
->cnf
.dad_transmits
;
3929 addrconf_mod_dad_work(ifp
, rand_num
);
3932 static void addrconf_dad_begin(struct inet6_ifaddr
*ifp
)
3934 struct inet6_dev
*idev
= ifp
->idev
;
3935 struct net_device
*dev
= idev
->dev
;
3936 bool bump_id
, notify
= false;
3939 addrconf_join_solict(dev
, &ifp
->addr
);
3941 prandom_seed((__force u32
) ifp
->addr
.s6_addr32
[3]);
3943 read_lock_bh(&idev
->lock
);
3944 spin_lock(&ifp
->lock
);
3945 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
)
3949 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
3950 (net
->ipv6
.devconf_all
->accept_dad
< 1 &&
3951 idev
->cnf
.accept_dad
< 1) ||
3952 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
3953 ifp
->flags
& IFA_F_NODAD
) {
3954 bool send_na
= false;
3956 if (ifp
->flags
& IFA_F_TENTATIVE
&&
3957 !(ifp
->flags
& IFA_F_OPTIMISTIC
))
3959 bump_id
= ifp
->flags
& IFA_F_TENTATIVE
;
3960 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3961 spin_unlock(&ifp
->lock
);
3962 read_unlock_bh(&idev
->lock
);
3964 addrconf_dad_completed(ifp
, bump_id
, send_na
);
3968 if (!(idev
->if_flags
& IF_READY
)) {
3969 spin_unlock(&ifp
->lock
);
3970 read_unlock_bh(&idev
->lock
);
3972 * If the device is not ready:
3973 * - keep it tentative if it is a permanent address.
3974 * - otherwise, kill it.
3977 addrconf_dad_stop(ifp
, 0);
3982 * Optimistic nodes can start receiving
3985 if (ifp
->flags
& IFA_F_OPTIMISTIC
) {
3986 ip6_ins_rt(net
, ifp
->rt
);
3987 if (ipv6_use_optimistic_addr(net
, idev
)) {
3988 /* Because optimistic nodes can use this address,
3989 * notify listeners. If DAD fails, RTM_DELADDR is sent.
3995 addrconf_dad_kick(ifp
);
3997 spin_unlock(&ifp
->lock
);
3998 read_unlock_bh(&idev
->lock
);
4000 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
4003 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
)
4005 bool begin_dad
= false;
4007 spin_lock_bh(&ifp
->lock
);
4008 if (ifp
->state
!= INET6_IFADDR_STATE_DEAD
) {
4009 ifp
->state
= INET6_IFADDR_STATE_PREDAD
;
4012 spin_unlock_bh(&ifp
->lock
);
4015 addrconf_mod_dad_work(ifp
, 0);
4018 static void addrconf_dad_work(struct work_struct
*w
)
4020 struct inet6_ifaddr
*ifp
= container_of(to_delayed_work(w
),
4021 struct inet6_ifaddr
,
4023 struct inet6_dev
*idev
= ifp
->idev
;
4024 bool bump_id
, disable_ipv6
= false;
4025 struct in6_addr mcaddr
;
4031 } action
= DAD_PROCESS
;
4035 spin_lock_bh(&ifp
->lock
);
4036 if (ifp
->state
== INET6_IFADDR_STATE_PREDAD
) {
4038 ifp
->state
= INET6_IFADDR_STATE_DAD
;
4039 } else if (ifp
->state
== INET6_IFADDR_STATE_ERRDAD
) {
4041 ifp
->state
= INET6_IFADDR_STATE_POSTDAD
;
4043 if ((dev_net(idev
->dev
)->ipv6
.devconf_all
->accept_dad
> 1 ||
4044 idev
->cnf
.accept_dad
> 1) &&
4045 !idev
->cnf
.disable_ipv6
&&
4046 !(ifp
->flags
& IFA_F_STABLE_PRIVACY
)) {
4047 struct in6_addr addr
;
4049 addr
.s6_addr32
[0] = htonl(0xfe800000);
4050 addr
.s6_addr32
[1] = 0;
4052 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) &&
4053 ipv6_addr_equal(&ifp
->addr
, &addr
)) {
4054 /* DAD failed for link-local based on MAC */
4055 idev
->cnf
.disable_ipv6
= 1;
4057 pr_info("%s: IPv6 being disabled!\n",
4058 ifp
->idev
->dev
->name
);
4059 disable_ipv6
= true;
4063 spin_unlock_bh(&ifp
->lock
);
4065 if (action
== DAD_BEGIN
) {
4066 addrconf_dad_begin(ifp
);
4068 } else if (action
== DAD_ABORT
) {
4070 addrconf_dad_stop(ifp
, 1);
4072 addrconf_ifdown(idev
->dev
, 0);
4076 if (!ifp
->dad_probes
&& addrconf_dad_end(ifp
))
4079 write_lock_bh(&idev
->lock
);
4080 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
)) {
4081 write_unlock_bh(&idev
->lock
);
4085 spin_lock(&ifp
->lock
);
4086 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
) {
4087 spin_unlock(&ifp
->lock
);
4088 write_unlock_bh(&idev
->lock
);
4092 if (ifp
->dad_probes
== 0) {
4093 bool send_na
= false;
4096 * DAD was successful
4099 if (ifp
->flags
& IFA_F_TENTATIVE
&&
4100 !(ifp
->flags
& IFA_F_OPTIMISTIC
))
4102 bump_id
= ifp
->flags
& IFA_F_TENTATIVE
;
4103 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
4104 spin_unlock(&ifp
->lock
);
4105 write_unlock_bh(&idev
->lock
);
4107 addrconf_dad_completed(ifp
, bump_id
, send_na
);
4113 addrconf_mod_dad_work(ifp
,
4114 NEIGH_VAR(ifp
->idev
->nd_parms
, RETRANS_TIME
));
4115 spin_unlock(&ifp
->lock
);
4116 write_unlock_bh(&idev
->lock
);
4118 /* send a neighbour solicitation for our addr */
4119 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
4120 ndisc_send_ns(ifp
->idev
->dev
, &ifp
->addr
, &mcaddr
, &in6addr_any
,
4127 /* ifp->idev must be at least read locked */
4128 static bool ipv6_lonely_lladdr(struct inet6_ifaddr
*ifp
)
4130 struct inet6_ifaddr
*ifpiter
;
4131 struct inet6_dev
*idev
= ifp
->idev
;
4133 list_for_each_entry_reverse(ifpiter
, &idev
->addr_list
, if_list
) {
4134 if (ifpiter
->scope
> IFA_LINK
)
4136 if (ifp
!= ifpiter
&& ifpiter
->scope
== IFA_LINK
&&
4137 (ifpiter
->flags
& (IFA_F_PERMANENT
|IFA_F_TENTATIVE
|
4138 IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
)) ==
4145 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
, bool bump_id
,
4148 struct net_device
*dev
= ifp
->idev
->dev
;
4149 struct in6_addr lladdr
;
4150 bool send_rs
, send_mld
;
4152 addrconf_del_dad_work(ifp
);
4155 * Configure the address for reception. Now it is valid.
4158 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
4160 /* If added prefix is link local and we are prepared to process
4161 router advertisements, start sending router solicitations.
4164 read_lock_bh(&ifp
->idev
->lock
);
4165 send_mld
= ifp
->scope
== IFA_LINK
&& ipv6_lonely_lladdr(ifp
);
4166 send_rs
= send_mld
&&
4167 ipv6_accept_ra(ifp
->idev
) &&
4168 ifp
->idev
->cnf
.rtr_solicits
!= 0 &&
4169 (dev
->flags
&IFF_LOOPBACK
) == 0;
4170 read_unlock_bh(&ifp
->idev
->lock
);
4172 /* While dad is in progress mld report's source address is in6_addrany.
4173 * Resend with proper ll now.
4176 ipv6_mc_dad_complete(ifp
->idev
);
4178 /* send unsolicited NA if enabled */
4180 (ifp
->idev
->cnf
.ndisc_notify
||
4181 dev_net(dev
)->ipv6
.devconf_all
->ndisc_notify
)) {
4182 ndisc_send_na(dev
, &in6addr_linklocal_allnodes
, &ifp
->addr
,
4183 /*router=*/ !!ifp
->idev
->cnf
.forwarding
,
4184 /*solicited=*/ false, /*override=*/ true,
4190 * If a host as already performed a random delay
4191 * [...] as part of DAD [...] there is no need
4192 * to delay again before sending the first RS
4194 if (ipv6_get_lladdr(dev
, &lladdr
, IFA_F_TENTATIVE
))
4196 ndisc_send_rs(dev
, &lladdr
, &in6addr_linklocal_allrouters
);
4198 write_lock_bh(&ifp
->idev
->lock
);
4199 spin_lock(&ifp
->lock
);
4200 ifp
->idev
->rs_interval
= rfc3315_s14_backoff_init(
4201 ifp
->idev
->cnf
.rtr_solicit_interval
);
4202 ifp
->idev
->rs_probes
= 1;
4203 ifp
->idev
->if_flags
|= IF_RS_SENT
;
4204 addrconf_mod_rs_timer(ifp
->idev
, ifp
->idev
->rs_interval
);
4205 spin_unlock(&ifp
->lock
);
4206 write_unlock_bh(&ifp
->idev
->lock
);
4210 rt_genid_bump_ipv6(dev_net(dev
));
4212 /* Make sure that a new temporary address will be created
4213 * before this temporary address becomes deprecated.
4215 if (ifp
->flags
& IFA_F_TEMPORARY
)
4216 addrconf_verify_rtnl();
4219 static void addrconf_dad_run(struct inet6_dev
*idev
, bool restart
)
4221 struct inet6_ifaddr
*ifp
;
4223 read_lock_bh(&idev
->lock
);
4224 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
4225 spin_lock(&ifp
->lock
);
4226 if ((ifp
->flags
& IFA_F_TENTATIVE
&&
4227 ifp
->state
== INET6_IFADDR_STATE_DAD
) || restart
) {
4229 ifp
->state
= INET6_IFADDR_STATE_PREDAD
;
4230 addrconf_dad_kick(ifp
);
4232 spin_unlock(&ifp
->lock
);
4234 read_unlock_bh(&idev
->lock
);
4237 #ifdef CONFIG_PROC_FS
4238 struct if6_iter_state
{
4239 struct seq_net_private p
;
4244 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
, loff_t pos
)
4246 struct if6_iter_state
*state
= seq
->private;
4247 struct net
*net
= seq_file_net(seq
);
4248 struct inet6_ifaddr
*ifa
= NULL
;
4251 /* initial bucket if pos is 0 */
4257 for (; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
4258 hlist_for_each_entry_rcu(ifa
, &inet6_addr_lst
[state
->bucket
],
4260 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
4262 /* sync with offset */
4263 if (p
< state
->offset
) {
4270 /* prepare for next bucket */
4277 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
,
4278 struct inet6_ifaddr
*ifa
)
4280 struct if6_iter_state
*state
= seq
->private;
4281 struct net
*net
= seq_file_net(seq
);
4283 hlist_for_each_entry_continue_rcu(ifa
, addr_lst
) {
4284 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
4291 while (++state
->bucket
< IN6_ADDR_HSIZE
) {
4292 hlist_for_each_entry_rcu(ifa
,
4293 &inet6_addr_lst
[state
->bucket
], addr_lst
) {
4294 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
4303 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
4307 return if6_get_first(seq
, *pos
);
4310 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
4312 struct inet6_ifaddr
*ifa
;
4314 ifa
= if6_get_next(seq
, v
);
4319 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
4325 static int if6_seq_show(struct seq_file
*seq
, void *v
)
4327 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
4328 seq_printf(seq
, "%pi6 %02x %02x %02x %02x %8s\n",
4330 ifp
->idev
->dev
->ifindex
,
4334 ifp
->idev
->dev
->name
);
4338 static const struct seq_operations if6_seq_ops
= {
4339 .start
= if6_seq_start
,
4340 .next
= if6_seq_next
,
4341 .show
= if6_seq_show
,
4342 .stop
= if6_seq_stop
,
4345 static int __net_init
if6_proc_net_init(struct net
*net
)
4347 if (!proc_create_net("if_inet6", 0444, net
->proc_net
, &if6_seq_ops
,
4348 sizeof(struct if6_iter_state
)))
4353 static void __net_exit
if6_proc_net_exit(struct net
*net
)
4355 remove_proc_entry("if_inet6", net
->proc_net
);
4358 static struct pernet_operations if6_proc_net_ops
= {
4359 .init
= if6_proc_net_init
,
4360 .exit
= if6_proc_net_exit
,
4363 int __init
if6_proc_init(void)
4365 return register_pernet_subsys(&if6_proc_net_ops
);
4368 void if6_proc_exit(void)
4370 unregister_pernet_subsys(&if6_proc_net_ops
);
4372 #endif /* CONFIG_PROC_FS */
4374 #if IS_ENABLED(CONFIG_IPV6_MIP6)
4375 /* Check if address is a home address configured on any interface. */
4376 int ipv6_chk_home_addr(struct net
*net
, const struct in6_addr
*addr
)
4378 unsigned int hash
= inet6_addr_hash(net
, addr
);
4379 struct inet6_ifaddr
*ifp
= NULL
;
4383 hlist_for_each_entry_rcu(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
4384 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
4386 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
4387 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
4398 * Periodic address status verification
4401 static void addrconf_verify_rtnl(void)
4403 unsigned long now
, next
, next_sec
, next_sched
;
4404 struct inet6_ifaddr
*ifp
;
4411 next
= round_jiffies_up(now
+ ADDR_CHECK_FREQUENCY
);
4413 cancel_delayed_work(&addr_chk_work
);
4415 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
4417 hlist_for_each_entry_rcu_bh(ifp
, &inet6_addr_lst
[i
], addr_lst
) {
4420 /* When setting preferred_lft to a value not zero or
4421 * infinity, while valid_lft is infinity
4422 * IFA_F_PERMANENT has a non-infinity life time.
4424 if ((ifp
->flags
& IFA_F_PERMANENT
) &&
4425 (ifp
->prefered_lft
== INFINITY_LIFE_TIME
))
4428 spin_lock(&ifp
->lock
);
4429 /* We try to batch several events at once. */
4430 age
= (now
- ifp
->tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
4432 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
4433 age
>= ifp
->valid_lft
) {
4434 spin_unlock(&ifp
->lock
);
4438 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
4439 spin_unlock(&ifp
->lock
);
4441 } else if (age
>= ifp
->prefered_lft
) {
4442 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
4445 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
4447 ifp
->flags
|= IFA_F_DEPRECATED
;
4450 if ((ifp
->valid_lft
!= INFINITY_LIFE_TIME
) &&
4451 (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
)))
4452 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
4454 spin_unlock(&ifp
->lock
);
4459 ipv6_ifa_notify(0, ifp
);
4463 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
4464 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
4465 unsigned long regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
4466 ifp
->idev
->cnf
.dad_transmits
*
4467 NEIGH_VAR(ifp
->idev
->nd_parms
, RETRANS_TIME
) / HZ
;
4469 if (age
>= ifp
->prefered_lft
- regen_advance
) {
4470 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
4471 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
4472 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
4473 if (!ifp
->regen_count
&& ifpub
) {
4476 in6_ifa_hold(ifpub
);
4477 spin_unlock(&ifp
->lock
);
4479 spin_lock(&ifpub
->lock
);
4480 ifpub
->regen_count
= 0;
4481 spin_unlock(&ifpub
->lock
);
4482 rcu_read_unlock_bh();
4483 ipv6_create_tempaddr(ifpub
, ifp
, true);
4489 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
4490 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
4491 spin_unlock(&ifp
->lock
);
4493 /* ifp->prefered_lft <= ifp->valid_lft */
4494 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
4495 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
4496 spin_unlock(&ifp
->lock
);
4501 next_sec
= round_jiffies_up(next
);
4504 /* If rounded timeout is accurate enough, accept it. */
4505 if (time_before(next_sec
, next
+ ADDRCONF_TIMER_FUZZ
))
4506 next_sched
= next_sec
;
4508 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
4509 if (time_before(next_sched
, jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
))
4510 next_sched
= jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
;
4512 pr_debug("now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
4513 now
, next
, next_sec
, next_sched
);
4514 mod_delayed_work(addrconf_wq
, &addr_chk_work
, next_sched
- now
);
4515 rcu_read_unlock_bh();
4518 static void addrconf_verify_work(struct work_struct
*w
)
4521 addrconf_verify_rtnl();
4525 static void addrconf_verify(void)
4527 mod_delayed_work(addrconf_wq
, &addr_chk_work
, 0);
4530 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
,
4531 struct in6_addr
**peer_pfx
)
4533 struct in6_addr
*pfx
= NULL
;
4538 pfx
= nla_data(addr
);
4541 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
4543 pfx
= nla_data(local
);
4549 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
4550 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
4551 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
4552 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
4553 [IFA_FLAGS
] = { .len
= sizeof(u32
) },
4554 [IFA_RT_PRIORITY
] = { .len
= sizeof(u32
) },
4555 [IFA_TARGET_NETNSID
] = { .type
= NLA_S32
},
4559 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
4560 struct netlink_ext_ack
*extack
)
4562 struct net
*net
= sock_net(skb
->sk
);
4563 struct ifaddrmsg
*ifm
;
4564 struct nlattr
*tb
[IFA_MAX
+1];
4565 struct in6_addr
*pfx
, *peer_pfx
;
4569 err
= nlmsg_parse_deprecated(nlh
, sizeof(*ifm
), tb
, IFA_MAX
,
4570 ifa_ipv6_policy
, extack
);
4574 ifm
= nlmsg_data(nlh
);
4575 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer_pfx
);
4579 ifa_flags
= tb
[IFA_FLAGS
] ? nla_get_u32(tb
[IFA_FLAGS
]) : ifm
->ifa_flags
;
4581 /* We ignore other flags so far. */
4582 ifa_flags
&= IFA_F_MANAGETEMPADDR
;
4584 return inet6_addr_del(net
, ifm
->ifa_index
, ifa_flags
, pfx
,
4585 ifm
->ifa_prefixlen
);
4588 static int modify_prefix_route(struct inet6_ifaddr
*ifp
,
4589 unsigned long expires
, u32 flags
)
4591 struct fib6_info
*f6i
;
4594 f6i
= addrconf_get_prefix_route(&ifp
->addr
, ifp
->prefix_len
,
4595 ifp
->idev
->dev
, 0, RTF_DEFAULT
, true);
4599 prio
= ifp
->rt_priority
? : IP6_RT_PRIO_ADDRCONF
;
4600 if (f6i
->fib6_metric
!= prio
) {
4601 /* delete old one */
4602 ip6_del_rt(dev_net(ifp
->idev
->dev
), f6i
);
4605 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
,
4606 ifp
->rt_priority
, ifp
->idev
->dev
,
4607 expires
, flags
, GFP_KERNEL
);
4610 fib6_clean_expires(f6i
);
4612 fib6_set_expires(f6i
, expires
);
4614 fib6_info_release(f6i
);
4620 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, struct ifa6_config
*cfg
)
4624 unsigned long timeout
;
4625 bool was_managetempaddr
;
4626 bool had_prefixroute
;
4630 if (!cfg
->valid_lft
|| cfg
->preferred_lft
> cfg
->valid_lft
)
4633 if (cfg
->ifa_flags
& IFA_F_MANAGETEMPADDR
&&
4634 (ifp
->flags
& IFA_F_TEMPORARY
|| ifp
->prefix_len
!= 64))
4637 if (!(ifp
->flags
& IFA_F_TENTATIVE
) || ifp
->flags
& IFA_F_DADFAILED
)
4638 cfg
->ifa_flags
&= ~IFA_F_OPTIMISTIC
;
4640 timeout
= addrconf_timeout_fixup(cfg
->valid_lft
, HZ
);
4641 if (addrconf_finite_timeout(timeout
)) {
4642 expires
= jiffies_to_clock_t(timeout
* HZ
);
4643 cfg
->valid_lft
= timeout
;
4644 flags
= RTF_EXPIRES
;
4648 cfg
->ifa_flags
|= IFA_F_PERMANENT
;
4651 timeout
= addrconf_timeout_fixup(cfg
->preferred_lft
, HZ
);
4652 if (addrconf_finite_timeout(timeout
)) {
4654 cfg
->ifa_flags
|= IFA_F_DEPRECATED
;
4655 cfg
->preferred_lft
= timeout
;
4658 spin_lock_bh(&ifp
->lock
);
4659 was_managetempaddr
= ifp
->flags
& IFA_F_MANAGETEMPADDR
;
4660 had_prefixroute
= ifp
->flags
& IFA_F_PERMANENT
&&
4661 !(ifp
->flags
& IFA_F_NOPREFIXROUTE
);
4662 ifp
->flags
&= ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
|
4663 IFA_F_HOMEADDRESS
| IFA_F_MANAGETEMPADDR
|
4664 IFA_F_NOPREFIXROUTE
);
4665 ifp
->flags
|= cfg
->ifa_flags
;
4666 ifp
->tstamp
= jiffies
;
4667 ifp
->valid_lft
= cfg
->valid_lft
;
4668 ifp
->prefered_lft
= cfg
->preferred_lft
;
4670 if (cfg
->rt_priority
&& cfg
->rt_priority
!= ifp
->rt_priority
)
4671 ifp
->rt_priority
= cfg
->rt_priority
;
4673 spin_unlock_bh(&ifp
->lock
);
4674 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
4675 ipv6_ifa_notify(0, ifp
);
4677 if (!(cfg
->ifa_flags
& IFA_F_NOPREFIXROUTE
)) {
4680 if (had_prefixroute
)
4681 rc
= modify_prefix_route(ifp
, expires
, flags
);
4683 /* prefix route could have been deleted; if so restore it */
4684 if (rc
== -ENOENT
) {
4685 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
,
4686 ifp
->rt_priority
, ifp
->idev
->dev
,
4687 expires
, flags
, GFP_KERNEL
);
4689 } else if (had_prefixroute
) {
4690 enum cleanup_prefix_rt_t action
;
4691 unsigned long rt_expires
;
4693 write_lock_bh(&ifp
->idev
->lock
);
4694 action
= check_cleanup_prefix_route(ifp
, &rt_expires
);
4695 write_unlock_bh(&ifp
->idev
->lock
);
4697 if (action
!= CLEANUP_PREFIX_RT_NOP
) {
4698 cleanup_prefix_route(ifp
, rt_expires
,
4699 action
== CLEANUP_PREFIX_RT_DEL
);
4703 if (was_managetempaddr
|| ifp
->flags
& IFA_F_MANAGETEMPADDR
) {
4704 if (was_managetempaddr
&&
4705 !(ifp
->flags
& IFA_F_MANAGETEMPADDR
)) {
4707 cfg
->preferred_lft
= 0;
4709 manage_tempaddrs(ifp
->idev
, ifp
, cfg
->valid_lft
,
4710 cfg
->preferred_lft
, !was_managetempaddr
,
4714 addrconf_verify_rtnl();
4720 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
4721 struct netlink_ext_ack
*extack
)
4723 struct net
*net
= sock_net(skb
->sk
);
4724 struct ifaddrmsg
*ifm
;
4725 struct nlattr
*tb
[IFA_MAX
+1];
4726 struct in6_addr
*peer_pfx
;
4727 struct inet6_ifaddr
*ifa
;
4728 struct net_device
*dev
;
4729 struct inet6_dev
*idev
;
4730 struct ifa6_config cfg
;
4733 err
= nlmsg_parse_deprecated(nlh
, sizeof(*ifm
), tb
, IFA_MAX
,
4734 ifa_ipv6_policy
, extack
);
4738 memset(&cfg
, 0, sizeof(cfg
));
4740 ifm
= nlmsg_data(nlh
);
4741 cfg
.pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer_pfx
);
4745 cfg
.peer_pfx
= peer_pfx
;
4746 cfg
.plen
= ifm
->ifa_prefixlen
;
4747 if (tb
[IFA_RT_PRIORITY
])
4748 cfg
.rt_priority
= nla_get_u32(tb
[IFA_RT_PRIORITY
]);
4750 cfg
.valid_lft
= INFINITY_LIFE_TIME
;
4751 cfg
.preferred_lft
= INFINITY_LIFE_TIME
;
4753 if (tb
[IFA_CACHEINFO
]) {
4754 struct ifa_cacheinfo
*ci
;
4756 ci
= nla_data(tb
[IFA_CACHEINFO
]);
4757 cfg
.valid_lft
= ci
->ifa_valid
;
4758 cfg
.preferred_lft
= ci
->ifa_prefered
;
4761 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
4766 cfg
.ifa_flags
= nla_get_u32(tb
[IFA_FLAGS
]);
4768 cfg
.ifa_flags
= ifm
->ifa_flags
;
4770 /* We ignore other flags so far. */
4771 cfg
.ifa_flags
&= IFA_F_NODAD
| IFA_F_HOMEADDRESS
|
4772 IFA_F_MANAGETEMPADDR
| IFA_F_NOPREFIXROUTE
|
4773 IFA_F_MCAUTOJOIN
| IFA_F_OPTIMISTIC
;
4775 idev
= ipv6_find_idev(dev
);
4777 return PTR_ERR(idev
);
4779 if (!ipv6_allow_optimistic_dad(net
, idev
))
4780 cfg
.ifa_flags
&= ~IFA_F_OPTIMISTIC
;
4782 if (cfg
.ifa_flags
& IFA_F_NODAD
&&
4783 cfg
.ifa_flags
& IFA_F_OPTIMISTIC
) {
4784 NL_SET_ERR_MSG(extack
, "IFA_F_NODAD and IFA_F_OPTIMISTIC are mutually exclusive");
4788 ifa
= ipv6_get_ifaddr(net
, cfg
.pfx
, dev
, 1);
4791 * It would be best to check for !NLM_F_CREATE here but
4792 * userspace already relies on not having to provide this.
4794 return inet6_addr_add(net
, ifm
->ifa_index
, &cfg
, extack
);
4797 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
4798 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
4801 err
= inet6_addr_modify(ifa
, &cfg
);
4808 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u32 flags
,
4809 u8 scope
, int ifindex
)
4811 struct ifaddrmsg
*ifm
;
4813 ifm
= nlmsg_data(nlh
);
4814 ifm
->ifa_family
= AF_INET6
;
4815 ifm
->ifa_prefixlen
= prefixlen
;
4816 ifm
->ifa_flags
= flags
;
4817 ifm
->ifa_scope
= scope
;
4818 ifm
->ifa_index
= ifindex
;
4821 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
4822 unsigned long tstamp
, u32 preferred
, u32 valid
)
4824 struct ifa_cacheinfo ci
;
4826 ci
.cstamp
= cstamp_delta(cstamp
);
4827 ci
.tstamp
= cstamp_delta(tstamp
);
4828 ci
.ifa_prefered
= preferred
;
4829 ci
.ifa_valid
= valid
;
4831 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
4834 static inline int rt_scope(int ifa_scope
)
4836 if (ifa_scope
& IFA_HOST
)
4837 return RT_SCOPE_HOST
;
4838 else if (ifa_scope
& IFA_LINK
)
4839 return RT_SCOPE_LINK
;
4840 else if (ifa_scope
& IFA_SITE
)
4841 return RT_SCOPE_SITE
;
4843 return RT_SCOPE_UNIVERSE
;
4846 static inline int inet6_ifaddr_msgsize(void)
4848 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
4849 + nla_total_size(16) /* IFA_LOCAL */
4850 + nla_total_size(16) /* IFA_ADDRESS */
4851 + nla_total_size(sizeof(struct ifa_cacheinfo
))
4852 + nla_total_size(4) /* IFA_FLAGS */
4853 + nla_total_size(4) /* IFA_RT_PRIORITY */;
4862 struct inet6_fill_args
{
4869 enum addr_type_t type
;
4872 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
4873 struct inet6_fill_args
*args
)
4875 struct nlmsghdr
*nlh
;
4876 u32 preferred
, valid
;
4878 nlh
= nlmsg_put(skb
, args
->portid
, args
->seq
, args
->event
,
4879 sizeof(struct ifaddrmsg
), args
->flags
);
4883 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
4884 ifa
->idev
->dev
->ifindex
);
4886 if (args
->netnsid
>= 0 &&
4887 nla_put_s32(skb
, IFA_TARGET_NETNSID
, args
->netnsid
))
4890 if (!((ifa
->flags
&IFA_F_PERMANENT
) &&
4891 (ifa
->prefered_lft
== INFINITY_LIFE_TIME
))) {
4892 preferred
= ifa
->prefered_lft
;
4893 valid
= ifa
->valid_lft
;
4894 if (preferred
!= INFINITY_LIFE_TIME
) {
4895 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
4896 if (preferred
> tval
)
4900 if (valid
!= INFINITY_LIFE_TIME
) {
4908 preferred
= INFINITY_LIFE_TIME
;
4909 valid
= INFINITY_LIFE_TIME
;
4912 if (!ipv6_addr_any(&ifa
->peer_addr
)) {
4913 if (nla_put_in6_addr(skb
, IFA_LOCAL
, &ifa
->addr
) < 0 ||
4914 nla_put_in6_addr(skb
, IFA_ADDRESS
, &ifa
->peer_addr
) < 0)
4917 if (nla_put_in6_addr(skb
, IFA_ADDRESS
, &ifa
->addr
) < 0)
4920 if (ifa
->rt_priority
&&
4921 nla_put_u32(skb
, IFA_RT_PRIORITY
, ifa
->rt_priority
))
4924 if (put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0)
4927 if (nla_put_u32(skb
, IFA_FLAGS
, ifa
->flags
) < 0)
4930 nlmsg_end(skb
, nlh
);
4934 nlmsg_cancel(skb
, nlh
);
4938 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
4939 struct inet6_fill_args
*args
)
4941 struct nlmsghdr
*nlh
;
4942 u8 scope
= RT_SCOPE_UNIVERSE
;
4943 int ifindex
= ifmca
->idev
->dev
->ifindex
;
4945 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
4946 scope
= RT_SCOPE_SITE
;
4948 nlh
= nlmsg_put(skb
, args
->portid
, args
->seq
, args
->event
,
4949 sizeof(struct ifaddrmsg
), args
->flags
);
4953 if (args
->netnsid
>= 0 &&
4954 nla_put_s32(skb
, IFA_TARGET_NETNSID
, args
->netnsid
))
4957 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
4958 if (nla_put_in6_addr(skb
, IFA_MULTICAST
, &ifmca
->mca_addr
) < 0 ||
4959 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
4960 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
4961 nlmsg_cancel(skb
, nlh
);
4965 nlmsg_end(skb
, nlh
);
4969 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
4970 struct inet6_fill_args
*args
)
4972 struct net_device
*dev
= fib6_info_nh_dev(ifaca
->aca_rt
);
4973 int ifindex
= dev
? dev
->ifindex
: 1;
4974 struct nlmsghdr
*nlh
;
4975 u8 scope
= RT_SCOPE_UNIVERSE
;
4977 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
4978 scope
= RT_SCOPE_SITE
;
4980 nlh
= nlmsg_put(skb
, args
->portid
, args
->seq
, args
->event
,
4981 sizeof(struct ifaddrmsg
), args
->flags
);
4985 if (args
->netnsid
>= 0 &&
4986 nla_put_s32(skb
, IFA_TARGET_NETNSID
, args
->netnsid
))
4989 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
4990 if (nla_put_in6_addr(skb
, IFA_ANYCAST
, &ifaca
->aca_addr
) < 0 ||
4991 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
4992 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
4993 nlmsg_cancel(skb
, nlh
);
4997 nlmsg_end(skb
, nlh
);
5001 /* called with rcu_read_lock() */
5002 static int in6_dump_addrs(struct inet6_dev
*idev
, struct sk_buff
*skb
,
5003 struct netlink_callback
*cb
, int s_ip_idx
,
5004 struct inet6_fill_args
*fillargs
)
5006 struct ifmcaddr6
*ifmca
;
5007 struct ifacaddr6
*ifaca
;
5011 read_lock_bh(&idev
->lock
);
5012 switch (fillargs
->type
) {
5013 case UNICAST_ADDR
: {
5014 struct inet6_ifaddr
*ifa
;
5015 fillargs
->event
= RTM_NEWADDR
;
5017 /* unicast address incl. temp addr */
5018 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
5019 if (ip_idx
< s_ip_idx
)
5021 err
= inet6_fill_ifaddr(skb
, ifa
, fillargs
);
5024 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
5030 case MULTICAST_ADDR
:
5031 fillargs
->event
= RTM_GETMULTICAST
;
5033 /* multicast address */
5034 for (ifmca
= idev
->mc_list
; ifmca
;
5035 ifmca
= ifmca
->next
, ip_idx
++) {
5036 if (ip_idx
< s_ip_idx
)
5038 err
= inet6_fill_ifmcaddr(skb
, ifmca
, fillargs
);
5044 fillargs
->event
= RTM_GETANYCAST
;
5045 /* anycast address */
5046 for (ifaca
= idev
->ac_list
; ifaca
;
5047 ifaca
= ifaca
->aca_next
, ip_idx
++) {
5048 if (ip_idx
< s_ip_idx
)
5050 err
= inet6_fill_ifacaddr(skb
, ifaca
, fillargs
);
5058 read_unlock_bh(&idev
->lock
);
5059 cb
->args
[2] = ip_idx
;
5063 static int inet6_valid_dump_ifaddr_req(const struct nlmsghdr
*nlh
,
5064 struct inet6_fill_args
*fillargs
,
5065 struct net
**tgt_net
, struct sock
*sk
,
5066 struct netlink_callback
*cb
)
5068 struct netlink_ext_ack
*extack
= cb
->extack
;
5069 struct nlattr
*tb
[IFA_MAX
+1];
5070 struct ifaddrmsg
*ifm
;
5073 if (nlh
->nlmsg_len
< nlmsg_msg_size(sizeof(*ifm
))) {
5074 NL_SET_ERR_MSG_MOD(extack
, "Invalid header for address dump request");
5078 ifm
= nlmsg_data(nlh
);
5079 if (ifm
->ifa_prefixlen
|| ifm
->ifa_flags
|| ifm
->ifa_scope
) {
5080 NL_SET_ERR_MSG_MOD(extack
, "Invalid values in header for address dump request");
5084 fillargs
->ifindex
= ifm
->ifa_index
;
5085 if (fillargs
->ifindex
) {
5086 cb
->answer_flags
|= NLM_F_DUMP_FILTERED
;
5087 fillargs
->flags
|= NLM_F_DUMP_FILTERED
;
5090 err
= nlmsg_parse_deprecated_strict(nlh
, sizeof(*ifm
), tb
, IFA_MAX
,
5091 ifa_ipv6_policy
, extack
);
5095 for (i
= 0; i
<= IFA_MAX
; ++i
) {
5099 if (i
== IFA_TARGET_NETNSID
) {
5102 fillargs
->netnsid
= nla_get_s32(tb
[i
]);
5103 net
= rtnl_get_net_ns_capable(sk
, fillargs
->netnsid
);
5105 fillargs
->netnsid
= -1;
5106 NL_SET_ERR_MSG_MOD(extack
, "Invalid target network namespace id");
5107 return PTR_ERR(net
);
5111 NL_SET_ERR_MSG_MOD(extack
, "Unsupported attribute in dump request");
5119 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
5120 enum addr_type_t type
)
5122 const struct nlmsghdr
*nlh
= cb
->nlh
;
5123 struct inet6_fill_args fillargs
= {
5124 .portid
= NETLINK_CB(cb
->skb
).portid
,
5125 .seq
= cb
->nlh
->nlmsg_seq
,
5126 .flags
= NLM_F_MULTI
,
5130 struct net
*net
= sock_net(skb
->sk
);
5131 struct net
*tgt_net
= net
;
5132 int idx
, s_idx
, s_ip_idx
;
5134 struct net_device
*dev
;
5135 struct inet6_dev
*idev
;
5136 struct hlist_head
*head
;
5140 s_idx
= idx
= cb
->args
[1];
5141 s_ip_idx
= cb
->args
[2];
5143 if (cb
->strict_check
) {
5144 err
= inet6_valid_dump_ifaddr_req(nlh
, &fillargs
, &tgt_net
,
5150 if (fillargs
.ifindex
) {
5151 dev
= __dev_get_by_index(tgt_net
, fillargs
.ifindex
);
5156 idev
= __in6_dev_get(dev
);
5158 err
= in6_dump_addrs(idev
, skb
, cb
, s_ip_idx
,
5168 cb
->seq
= atomic_read(&tgt_net
->ipv6
.dev_addr_genid
) ^ tgt_net
->dev_base_seq
;
5169 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
5171 head
= &tgt_net
->dev_index_head
[h
];
5172 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
5175 if (h
> s_h
|| idx
> s_idx
)
5177 idev
= __in6_dev_get(dev
);
5181 if (in6_dump_addrs(idev
, skb
, cb
, s_ip_idx
,
5193 if (fillargs
.netnsid
>= 0)
5196 return skb
->len
? : err
;
5199 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
5201 enum addr_type_t type
= UNICAST_ADDR
;
5203 return inet6_dump_addr(skb
, cb
, type
);
5206 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
5208 enum addr_type_t type
= MULTICAST_ADDR
;
5210 return inet6_dump_addr(skb
, cb
, type
);
5214 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
5216 enum addr_type_t type
= ANYCAST_ADDR
;
5218 return inet6_dump_addr(skb
, cb
, type
);
5221 static int inet6_rtm_valid_getaddr_req(struct sk_buff
*skb
,
5222 const struct nlmsghdr
*nlh
,
5224 struct netlink_ext_ack
*extack
)
5226 struct ifaddrmsg
*ifm
;
5229 if (nlh
->nlmsg_len
< nlmsg_msg_size(sizeof(*ifm
))) {
5230 NL_SET_ERR_MSG_MOD(extack
, "Invalid header for get address request");
5234 if (!netlink_strict_get_check(skb
))
5235 return nlmsg_parse_deprecated(nlh
, sizeof(*ifm
), tb
, IFA_MAX
,
5236 ifa_ipv6_policy
, extack
);
5238 ifm
= nlmsg_data(nlh
);
5239 if (ifm
->ifa_prefixlen
|| ifm
->ifa_flags
|| ifm
->ifa_scope
) {
5240 NL_SET_ERR_MSG_MOD(extack
, "Invalid values in header for get address request");
5244 err
= nlmsg_parse_deprecated_strict(nlh
, sizeof(*ifm
), tb
, IFA_MAX
,
5245 ifa_ipv6_policy
, extack
);
5249 for (i
= 0; i
<= IFA_MAX
; i
++) {
5254 case IFA_TARGET_NETNSID
:
5259 NL_SET_ERR_MSG_MOD(extack
, "Unsupported attribute in get address request");
5267 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
*nlh
,
5268 struct netlink_ext_ack
*extack
)
5270 struct net
*net
= sock_net(in_skb
->sk
);
5271 struct inet6_fill_args fillargs
= {
5272 .portid
= NETLINK_CB(in_skb
).portid
,
5273 .seq
= nlh
->nlmsg_seq
,
5274 .event
= RTM_NEWADDR
,
5278 struct net
*tgt_net
= net
;
5279 struct ifaddrmsg
*ifm
;
5280 struct nlattr
*tb
[IFA_MAX
+1];
5281 struct in6_addr
*addr
= NULL
, *peer
;
5282 struct net_device
*dev
= NULL
;
5283 struct inet6_ifaddr
*ifa
;
5284 struct sk_buff
*skb
;
5287 err
= inet6_rtm_valid_getaddr_req(in_skb
, nlh
, tb
, extack
);
5291 if (tb
[IFA_TARGET_NETNSID
]) {
5292 fillargs
.netnsid
= nla_get_s32(tb
[IFA_TARGET_NETNSID
]);
5294 tgt_net
= rtnl_get_net_ns_capable(NETLINK_CB(in_skb
).sk
,
5296 if (IS_ERR(tgt_net
))
5297 return PTR_ERR(tgt_net
);
5300 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer
);
5304 ifm
= nlmsg_data(nlh
);
5306 dev
= dev_get_by_index(tgt_net
, ifm
->ifa_index
);
5308 ifa
= ipv6_get_ifaddr(tgt_net
, addr
, dev
, 1);
5310 err
= -EADDRNOTAVAIL
;
5314 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
);
5320 err
= inet6_fill_ifaddr(skb
, ifa
, &fillargs
);
5322 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
5323 WARN_ON(err
== -EMSGSIZE
);
5327 err
= rtnl_unicast(skb
, tgt_net
, NETLINK_CB(in_skb
).portid
);
5333 if (fillargs
.netnsid
>= 0)
5339 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
5341 struct sk_buff
*skb
;
5342 struct net
*net
= dev_net(ifa
->idev
->dev
);
5343 struct inet6_fill_args fillargs
= {
5352 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
5356 err
= inet6_fill_ifaddr(skb
, ifa
, &fillargs
);
5358 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
5359 WARN_ON(err
== -EMSGSIZE
);
5363 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
5367 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
5370 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
5371 __s32
*array
, int bytes
)
5373 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
5375 memset(array
, 0, bytes
);
5376 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
5377 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
5378 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
5379 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
5380 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
5381 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
5382 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
5383 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
5384 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] =
5385 jiffies_to_msecs(cnf
->rtr_solicit_interval
);
5386 array
[DEVCONF_RTR_SOLICIT_MAX_INTERVAL
] =
5387 jiffies_to_msecs(cnf
->rtr_solicit_max_interval
);
5388 array
[DEVCONF_RTR_SOLICIT_DELAY
] =
5389 jiffies_to_msecs(cnf
->rtr_solicit_delay
);
5390 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
5391 array
[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL
] =
5392 jiffies_to_msecs(cnf
->mldv1_unsolicited_report_interval
);
5393 array
[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL
] =
5394 jiffies_to_msecs(cnf
->mldv2_unsolicited_report_interval
);
5395 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
5396 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
5397 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
5398 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
5399 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
5400 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
5401 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
5402 array
[DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT
] = cnf
->accept_ra_min_hop_limit
;
5403 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
5404 #ifdef CONFIG_IPV6_ROUTER_PREF
5405 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
5406 array
[DEVCONF_RTR_PROBE_INTERVAL
] =
5407 jiffies_to_msecs(cnf
->rtr_probe_interval
);
5408 #ifdef CONFIG_IPV6_ROUTE_INFO
5409 array
[DEVCONF_ACCEPT_RA_RT_INFO_MIN_PLEN
] = cnf
->accept_ra_rt_info_min_plen
;
5410 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
5413 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
5414 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
5415 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
5416 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
5417 array
[DEVCONF_USE_OPTIMISTIC
] = cnf
->use_optimistic
;
5419 #ifdef CONFIG_IPV6_MROUTE
5420 array
[DEVCONF_MC_FORWARDING
] = cnf
->mc_forwarding
;
5422 array
[DEVCONF_DISABLE_IPV6
] = cnf
->disable_ipv6
;
5423 array
[DEVCONF_ACCEPT_DAD
] = cnf
->accept_dad
;
5424 array
[DEVCONF_FORCE_TLLAO
] = cnf
->force_tllao
;
5425 array
[DEVCONF_NDISC_NOTIFY
] = cnf
->ndisc_notify
;
5426 array
[DEVCONF_SUPPRESS_FRAG_NDISC
] = cnf
->suppress_frag_ndisc
;
5427 array
[DEVCONF_ACCEPT_RA_FROM_LOCAL
] = cnf
->accept_ra_from_local
;
5428 array
[DEVCONF_ACCEPT_RA_MTU
] = cnf
->accept_ra_mtu
;
5429 array
[DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN
] = cnf
->ignore_routes_with_linkdown
;
5430 /* we omit DEVCONF_STABLE_SECRET for now */
5431 array
[DEVCONF_USE_OIF_ADDRS_ONLY
] = cnf
->use_oif_addrs_only
;
5432 array
[DEVCONF_DROP_UNICAST_IN_L2_MULTICAST
] = cnf
->drop_unicast_in_l2_multicast
;
5433 array
[DEVCONF_DROP_UNSOLICITED_NA
] = cnf
->drop_unsolicited_na
;
5434 array
[DEVCONF_KEEP_ADDR_ON_DOWN
] = cnf
->keep_addr_on_down
;
5435 array
[DEVCONF_SEG6_ENABLED
] = cnf
->seg6_enabled
;
5436 #ifdef CONFIG_IPV6_SEG6_HMAC
5437 array
[DEVCONF_SEG6_REQUIRE_HMAC
] = cnf
->seg6_require_hmac
;
5439 array
[DEVCONF_ENHANCED_DAD
] = cnf
->enhanced_dad
;
5440 array
[DEVCONF_ADDR_GEN_MODE
] = cnf
->addr_gen_mode
;
5441 array
[DEVCONF_DISABLE_POLICY
] = cnf
->disable_policy
;
5442 array
[DEVCONF_NDISC_TCLASS
] = cnf
->ndisc_tclass
;
5445 static inline size_t inet6_ifla6_size(void)
5447 return nla_total_size(4) /* IFLA_INET6_FLAGS */
5448 + nla_total_size(sizeof(struct ifla_cacheinfo
))
5449 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
5450 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
5451 + nla_total_size(ICMP6_MIB_MAX
* 8) /* IFLA_INET6_ICMP6STATS */
5452 + nla_total_size(sizeof(struct in6_addr
)) /* IFLA_INET6_TOKEN */
5453 + nla_total_size(1) /* IFLA_INET6_ADDR_GEN_MODE */
5457 static inline size_t inet6_if_nlmsg_size(void)
5459 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
5460 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
5461 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
5462 + nla_total_size(4) /* IFLA_MTU */
5463 + nla_total_size(4) /* IFLA_LINK */
5464 + nla_total_size(1) /* IFLA_OPERSTATE */
5465 + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
5468 static inline void __snmp6_fill_statsdev(u64
*stats
, atomic_long_t
*mib
,
5472 int pad
= bytes
- sizeof(u64
) * ICMP6_MIB_MAX
;
5475 /* Use put_unaligned() because stats may not be aligned for u64. */
5476 put_unaligned(ICMP6_MIB_MAX
, &stats
[0]);
5477 for (i
= 1; i
< ICMP6_MIB_MAX
; i
++)
5478 put_unaligned(atomic_long_read(&mib
[i
]), &stats
[i
]);
5480 memset(&stats
[ICMP6_MIB_MAX
], 0, pad
);
5483 static inline void __snmp6_fill_stats64(u64
*stats
, void __percpu
*mib
,
5484 int bytes
, size_t syncpoff
)
5487 u64 buff
[IPSTATS_MIB_MAX
];
5488 int pad
= bytes
- sizeof(u64
) * IPSTATS_MIB_MAX
;
5492 memset(buff
, 0, sizeof(buff
));
5493 buff
[0] = IPSTATS_MIB_MAX
;
5495 for_each_possible_cpu(c
) {
5496 for (i
= 1; i
< IPSTATS_MIB_MAX
; i
++)
5497 buff
[i
] += snmp_get_cpu_field64(mib
, c
, i
, syncpoff
);
5500 memcpy(stats
, buff
, IPSTATS_MIB_MAX
* sizeof(u64
));
5501 memset(&stats
[IPSTATS_MIB_MAX
], 0, pad
);
5504 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
5508 case IFLA_INET6_STATS
:
5509 __snmp6_fill_stats64(stats
, idev
->stats
.ipv6
, bytes
,
5510 offsetof(struct ipstats_mib
, syncp
));
5512 case IFLA_INET6_ICMP6STATS
:
5513 __snmp6_fill_statsdev(stats
, idev
->stats
.icmpv6dev
->mibs
, bytes
);
5518 static int inet6_fill_ifla6_attrs(struct sk_buff
*skb
, struct inet6_dev
*idev
,
5519 u32 ext_filter_mask
)
5522 struct ifla_cacheinfo ci
;
5524 if (nla_put_u32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
))
5525 goto nla_put_failure
;
5526 ci
.max_reasm_len
= IPV6_MAXPLEN
;
5527 ci
.tstamp
= cstamp_delta(idev
->tstamp
);
5528 ci
.reachable_time
= jiffies_to_msecs(idev
->nd_parms
->reachable_time
);
5529 ci
.retrans_time
= jiffies_to_msecs(NEIGH_VAR(idev
->nd_parms
, RETRANS_TIME
));
5530 if (nla_put(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
))
5531 goto nla_put_failure
;
5532 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
5534 goto nla_put_failure
;
5535 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
5537 /* XXX - MC not implemented */
5539 if (ext_filter_mask
& RTEXT_FILTER_SKIP_STATS
)
5542 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
5544 goto nla_put_failure
;
5545 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
5547 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
5549 goto nla_put_failure
;
5550 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
5552 nla
= nla_reserve(skb
, IFLA_INET6_TOKEN
, sizeof(struct in6_addr
));
5554 goto nla_put_failure
;
5555 read_lock_bh(&idev
->lock
);
5556 memcpy(nla_data(nla
), idev
->token
.s6_addr
, nla_len(nla
));
5557 read_unlock_bh(&idev
->lock
);
5559 if (nla_put_u8(skb
, IFLA_INET6_ADDR_GEN_MODE
, idev
->cnf
.addr_gen_mode
))
5560 goto nla_put_failure
;
5568 static size_t inet6_get_link_af_size(const struct net_device
*dev
,
5569 u32 ext_filter_mask
)
5571 if (!__in6_dev_get(dev
))
5574 return inet6_ifla6_size();
5577 static int inet6_fill_link_af(struct sk_buff
*skb
, const struct net_device
*dev
,
5578 u32 ext_filter_mask
)
5580 struct inet6_dev
*idev
= __in6_dev_get(dev
);
5585 if (inet6_fill_ifla6_attrs(skb
, idev
, ext_filter_mask
) < 0)
5591 static int inet6_set_iftoken(struct inet6_dev
*idev
, struct in6_addr
*token
)
5593 struct inet6_ifaddr
*ifp
;
5594 struct net_device
*dev
= idev
->dev
;
5595 bool clear_token
, update_rs
= false;
5596 struct in6_addr ll_addr
;
5602 if (dev
->flags
& (IFF_LOOPBACK
| IFF_NOARP
))
5604 if (!ipv6_accept_ra(idev
))
5606 if (idev
->cnf
.rtr_solicits
== 0)
5609 write_lock_bh(&idev
->lock
);
5611 BUILD_BUG_ON(sizeof(token
->s6_addr
) != 16);
5612 memcpy(idev
->token
.s6_addr
+ 8, token
->s6_addr
+ 8, 8);
5614 write_unlock_bh(&idev
->lock
);
5616 clear_token
= ipv6_addr_any(token
);
5620 if (!idev
->dead
&& (idev
->if_flags
& IF_READY
) &&
5621 !ipv6_get_lladdr(dev
, &ll_addr
, IFA_F_TENTATIVE
|
5622 IFA_F_OPTIMISTIC
)) {
5623 /* If we're not ready, then normal ifup will take care
5624 * of this. Otherwise, we need to request our rs here.
5626 ndisc_send_rs(dev
, &ll_addr
, &in6addr_linklocal_allrouters
);
5631 write_lock_bh(&idev
->lock
);
5634 idev
->if_flags
|= IF_RS_SENT
;
5635 idev
->rs_interval
= rfc3315_s14_backoff_init(
5636 idev
->cnf
.rtr_solicit_interval
);
5637 idev
->rs_probes
= 1;
5638 addrconf_mod_rs_timer(idev
, idev
->rs_interval
);
5641 /* Well, that's kinda nasty ... */
5642 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
5643 spin_lock(&ifp
->lock
);
5644 if (ifp
->tokenized
) {
5646 ifp
->prefered_lft
= 0;
5648 spin_unlock(&ifp
->lock
);
5651 write_unlock_bh(&idev
->lock
);
5652 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
5653 addrconf_verify_rtnl();
5657 static const struct nla_policy inet6_af_policy
[IFLA_INET6_MAX
+ 1] = {
5658 [IFLA_INET6_ADDR_GEN_MODE
] = { .type
= NLA_U8
},
5659 [IFLA_INET6_TOKEN
] = { .len
= sizeof(struct in6_addr
) },
5662 static int check_addr_gen_mode(int mode
)
5664 if (mode
!= IN6_ADDR_GEN_MODE_EUI64
&&
5665 mode
!= IN6_ADDR_GEN_MODE_NONE
&&
5666 mode
!= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
&&
5667 mode
!= IN6_ADDR_GEN_MODE_RANDOM
)
5672 static int check_stable_privacy(struct inet6_dev
*idev
, struct net
*net
,
5675 if (mode
== IN6_ADDR_GEN_MODE_STABLE_PRIVACY
&&
5676 !idev
->cnf
.stable_secret
.initialized
&&
5677 !net
->ipv6
.devconf_dflt
->stable_secret
.initialized
)
5682 static int inet6_validate_link_af(const struct net_device
*dev
,
5683 const struct nlattr
*nla
)
5685 struct nlattr
*tb
[IFLA_INET6_MAX
+ 1];
5686 struct inet6_dev
*idev
= NULL
;
5690 idev
= __in6_dev_get(dev
);
5692 return -EAFNOSUPPORT
;
5695 err
= nla_parse_nested_deprecated(tb
, IFLA_INET6_MAX
, nla
,
5696 inet6_af_policy
, NULL
);
5700 if (!tb
[IFLA_INET6_TOKEN
] && !tb
[IFLA_INET6_ADDR_GEN_MODE
])
5703 if (tb
[IFLA_INET6_ADDR_GEN_MODE
]) {
5704 u8 mode
= nla_get_u8(tb
[IFLA_INET6_ADDR_GEN_MODE
]);
5706 if (check_addr_gen_mode(mode
) < 0)
5708 if (dev
&& check_stable_privacy(idev
, dev_net(dev
), mode
) < 0)
5715 static int inet6_set_link_af(struct net_device
*dev
, const struct nlattr
*nla
)
5717 struct inet6_dev
*idev
= __in6_dev_get(dev
);
5718 struct nlattr
*tb
[IFLA_INET6_MAX
+ 1];
5721 if (nla_parse_nested_deprecated(tb
, IFLA_INET6_MAX
, nla
, NULL
, NULL
) < 0)
5724 if (tb
[IFLA_INET6_TOKEN
]) {
5725 err
= inet6_set_iftoken(idev
, nla_data(tb
[IFLA_INET6_TOKEN
]));
5730 if (tb
[IFLA_INET6_ADDR_GEN_MODE
]) {
5731 u8 mode
= nla_get_u8(tb
[IFLA_INET6_ADDR_GEN_MODE
]);
5733 idev
->cnf
.addr_gen_mode
= mode
;
5739 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
5740 u32 portid
, u32 seq
, int event
, unsigned int flags
)
5742 struct net_device
*dev
= idev
->dev
;
5743 struct ifinfomsg
*hdr
;
5744 struct nlmsghdr
*nlh
;
5747 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*hdr
), flags
);
5751 hdr
= nlmsg_data(nlh
);
5752 hdr
->ifi_family
= AF_INET6
;
5754 hdr
->ifi_type
= dev
->type
;
5755 hdr
->ifi_index
= dev
->ifindex
;
5756 hdr
->ifi_flags
= dev_get_flags(dev
);
5757 hdr
->ifi_change
= 0;
5759 if (nla_put_string(skb
, IFLA_IFNAME
, dev
->name
) ||
5761 nla_put(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
)) ||
5762 nla_put_u32(skb
, IFLA_MTU
, dev
->mtu
) ||
5763 (dev
->ifindex
!= dev_get_iflink(dev
) &&
5764 nla_put_u32(skb
, IFLA_LINK
, dev_get_iflink(dev
))) ||
5765 nla_put_u8(skb
, IFLA_OPERSTATE
,
5766 netif_running(dev
) ? dev
->operstate
: IF_OPER_DOWN
))
5767 goto nla_put_failure
;
5768 protoinfo
= nla_nest_start_noflag(skb
, IFLA_PROTINFO
);
5770 goto nla_put_failure
;
5772 if (inet6_fill_ifla6_attrs(skb
, idev
, 0) < 0)
5773 goto nla_put_failure
;
5775 nla_nest_end(skb
, protoinfo
);
5776 nlmsg_end(skb
, nlh
);
5780 nlmsg_cancel(skb
, nlh
);
5784 static int inet6_valid_dump_ifinfo(const struct nlmsghdr
*nlh
,
5785 struct netlink_ext_ack
*extack
)
5787 struct ifinfomsg
*ifm
;
5789 if (nlh
->nlmsg_len
< nlmsg_msg_size(sizeof(*ifm
))) {
5790 NL_SET_ERR_MSG_MOD(extack
, "Invalid header for link dump request");
5794 if (nlmsg_attrlen(nlh
, sizeof(*ifm
))) {
5795 NL_SET_ERR_MSG_MOD(extack
, "Invalid data after header");
5799 ifm
= nlmsg_data(nlh
);
5800 if (ifm
->__ifi_pad
|| ifm
->ifi_type
|| ifm
->ifi_flags
||
5801 ifm
->ifi_change
|| ifm
->ifi_index
) {
5802 NL_SET_ERR_MSG_MOD(extack
, "Invalid values in header for dump request");
5809 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
5811 struct net
*net
= sock_net(skb
->sk
);
5814 struct net_device
*dev
;
5815 struct inet6_dev
*idev
;
5816 struct hlist_head
*head
;
5818 /* only requests using strict checking can pass data to
5819 * influence the dump
5821 if (cb
->strict_check
) {
5822 int err
= inet6_valid_dump_ifinfo(cb
->nlh
, cb
->extack
);
5829 s_idx
= cb
->args
[1];
5832 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
5834 head
= &net
->dev_index_head
[h
];
5835 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
5838 idev
= __in6_dev_get(dev
);
5841 if (inet6_fill_ifinfo(skb
, idev
,
5842 NETLINK_CB(cb
->skb
).portid
,
5844 RTM_NEWLINK
, NLM_F_MULTI
) < 0)
5858 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
5860 struct sk_buff
*skb
;
5861 struct net
*net
= dev_net(idev
->dev
);
5864 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
5868 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
5870 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
5871 WARN_ON(err
== -EMSGSIZE
);
5875 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFINFO
, NULL
, GFP_ATOMIC
);
5879 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFINFO
, err
);
5882 static inline size_t inet6_prefix_nlmsg_size(void)
5884 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
5885 + nla_total_size(sizeof(struct in6_addr
))
5886 + nla_total_size(sizeof(struct prefix_cacheinfo
));
5889 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
5890 struct prefix_info
*pinfo
, u32 portid
, u32 seq
,
5891 int event
, unsigned int flags
)
5893 struct prefixmsg
*pmsg
;
5894 struct nlmsghdr
*nlh
;
5895 struct prefix_cacheinfo ci
;
5897 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*pmsg
), flags
);
5901 pmsg
= nlmsg_data(nlh
);
5902 pmsg
->prefix_family
= AF_INET6
;
5903 pmsg
->prefix_pad1
= 0;
5904 pmsg
->prefix_pad2
= 0;
5905 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
5906 pmsg
->prefix_len
= pinfo
->prefix_len
;
5907 pmsg
->prefix_type
= pinfo
->type
;
5908 pmsg
->prefix_pad3
= 0;
5909 pmsg
->prefix_flags
= 0;
5911 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
5912 if (pinfo
->autoconf
)
5913 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
5915 if (nla_put(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
))
5916 goto nla_put_failure
;
5917 ci
.preferred_time
= ntohl(pinfo
->prefered
);
5918 ci
.valid_time
= ntohl(pinfo
->valid
);
5919 if (nla_put(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
))
5920 goto nla_put_failure
;
5921 nlmsg_end(skb
, nlh
);
5925 nlmsg_cancel(skb
, nlh
);
5929 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
5930 struct prefix_info
*pinfo
)
5932 struct sk_buff
*skb
;
5933 struct net
*net
= dev_net(idev
->dev
);
5936 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
5940 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
5942 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
5943 WARN_ON(err
== -EMSGSIZE
);
5947 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
5951 rtnl_set_sk_err(net
, RTNLGRP_IPV6_PREFIX
, err
);
5954 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
5956 struct net
*net
= dev_net(ifp
->idev
->dev
);
5961 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
5966 * If the address was optimistic we inserted the route at the
5967 * start of our DAD process, so we don't need to do it again.
5968 * If the device was taken down in the middle of the DAD
5969 * cycle there is a race where we could get here without a
5970 * host route, so nothing to insert. That will be fixed when
5971 * the device is brought up.
5973 if (ifp
->rt
&& !rcu_access_pointer(ifp
->rt
->fib6_node
)) {
5974 ip6_ins_rt(net
, ifp
->rt
);
5975 } else if (!ifp
->rt
&& (ifp
->idev
->dev
->flags
& IFF_UP
)) {
5976 pr_warn("BUG: Address %pI6c on device %s is missing its host route.\n",
5977 &ifp
->addr
, ifp
->idev
->dev
->name
);
5980 if (ifp
->idev
->cnf
.forwarding
)
5981 addrconf_join_anycast(ifp
);
5982 if (!ipv6_addr_any(&ifp
->peer_addr
))
5983 addrconf_prefix_route(&ifp
->peer_addr
, 128, 0,
5984 ifp
->idev
->dev
, 0, 0,
5988 if (ifp
->idev
->cnf
.forwarding
)
5989 addrconf_leave_anycast(ifp
);
5990 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
5991 if (!ipv6_addr_any(&ifp
->peer_addr
)) {
5992 struct fib6_info
*rt
;
5994 rt
= addrconf_get_prefix_route(&ifp
->peer_addr
, 128,
5995 ifp
->idev
->dev
, 0, 0,
5998 ip6_del_rt(net
, rt
);
6001 ip6_del_rt(net
, ifp
->rt
);
6004 rt_genid_bump_ipv6(net
);
6007 atomic_inc(&net
->ipv6
.dev_addr_genid
);
6010 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
6013 if (likely(ifp
->idev
->dead
== 0))
6014 __ipv6_ifa_notify(event
, ifp
);
6015 rcu_read_unlock_bh();
6018 #ifdef CONFIG_SYSCTL
6021 int addrconf_sysctl_forward(struct ctl_table
*ctl
, int write
,
6022 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
6024 int *valp
= ctl
->data
;
6027 struct ctl_table lctl
;
6031 * ctl->data points to idev->cnf.forwarding, we should
6032 * not modify it until we get the rtnl lock.
6037 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
6040 ret
= addrconf_fixup_forwarding(ctl
, valp
, val
);
6047 int addrconf_sysctl_mtu(struct ctl_table
*ctl
, int write
,
6048 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
6050 struct inet6_dev
*idev
= ctl
->extra1
;
6051 int min_mtu
= IPV6_MIN_MTU
;
6052 struct ctl_table lctl
;
6055 lctl
.extra1
= &min_mtu
;
6056 lctl
.extra2
= idev
? &idev
->dev
->mtu
: NULL
;
6058 return proc_dointvec_minmax(&lctl
, write
, buffer
, lenp
, ppos
);
6061 static void dev_disable_change(struct inet6_dev
*idev
)
6063 struct netdev_notifier_info info
;
6065 if (!idev
|| !idev
->dev
)
6068 netdev_notifier_info_init(&info
, idev
->dev
);
6069 if (idev
->cnf
.disable_ipv6
)
6070 addrconf_notify(NULL
, NETDEV_DOWN
, &info
);
6072 addrconf_notify(NULL
, NETDEV_UP
, &info
);
6075 static void addrconf_disable_change(struct net
*net
, __s32 newf
)
6077 struct net_device
*dev
;
6078 struct inet6_dev
*idev
;
6080 for_each_netdev(net
, dev
) {
6081 idev
= __in6_dev_get(dev
);
6083 int changed
= (!idev
->cnf
.disable_ipv6
) ^ (!newf
);
6084 idev
->cnf
.disable_ipv6
= newf
;
6086 dev_disable_change(idev
);
6091 static int addrconf_disable_ipv6(struct ctl_table
*table
, int *p
, int newf
)
6096 if (!rtnl_trylock())
6097 return restart_syscall();
6099 net
= (struct net
*)table
->extra2
;
6103 if (p
== &net
->ipv6
.devconf_dflt
->disable_ipv6
) {
6108 if (p
== &net
->ipv6
.devconf_all
->disable_ipv6
) {
6109 net
->ipv6
.devconf_dflt
->disable_ipv6
= newf
;
6110 addrconf_disable_change(net
, newf
);
6111 } else if ((!newf
) ^ (!old
))
6112 dev_disable_change((struct inet6_dev
*)table
->extra1
);
6119 int addrconf_sysctl_disable(struct ctl_table
*ctl
, int write
,
6120 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
6122 int *valp
= ctl
->data
;
6125 struct ctl_table lctl
;
6129 * ctl->data points to idev->cnf.disable_ipv6, we should
6130 * not modify it until we get the rtnl lock.
6135 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
6138 ret
= addrconf_disable_ipv6(ctl
, valp
, val
);
6145 int addrconf_sysctl_proxy_ndp(struct ctl_table
*ctl
, int write
,
6146 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
6148 int *valp
= ctl
->data
;
6153 ret
= proc_dointvec(ctl
, write
, buffer
, lenp
, ppos
);
6156 if (write
&& old
!= new) {
6157 struct net
*net
= ctl
->extra2
;
6159 if (!rtnl_trylock())
6160 return restart_syscall();
6162 if (valp
== &net
->ipv6
.devconf_dflt
->proxy_ndp
)
6163 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
6164 NETCONFA_PROXY_NEIGH
,
6165 NETCONFA_IFINDEX_DEFAULT
,
6166 net
->ipv6
.devconf_dflt
);
6167 else if (valp
== &net
->ipv6
.devconf_all
->proxy_ndp
)
6168 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
6169 NETCONFA_PROXY_NEIGH
,
6170 NETCONFA_IFINDEX_ALL
,
6171 net
->ipv6
.devconf_all
);
6173 struct inet6_dev
*idev
= ctl
->extra1
;
6175 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
6176 NETCONFA_PROXY_NEIGH
,
6186 static int addrconf_sysctl_addr_gen_mode(struct ctl_table
*ctl
, int write
,
6187 void __user
*buffer
, size_t *lenp
,
6192 struct inet6_dev
*idev
= (struct inet6_dev
*)ctl
->extra1
;
6193 struct net
*net
= (struct net
*)ctl
->extra2
;
6194 struct ctl_table tmp
= {
6196 .maxlen
= sizeof(new_val
),
6200 if (!rtnl_trylock())
6201 return restart_syscall();
6203 new_val
= *((u32
*)ctl
->data
);
6205 ret
= proc_douintvec(&tmp
, write
, buffer
, lenp
, ppos
);
6210 if (check_addr_gen_mode(new_val
) < 0) {
6216 if (check_stable_privacy(idev
, net
, new_val
) < 0) {
6221 if (idev
->cnf
.addr_gen_mode
!= new_val
) {
6222 idev
->cnf
.addr_gen_mode
= new_val
;
6223 addrconf_dev_config(idev
->dev
);
6225 } else if (&net
->ipv6
.devconf_all
->addr_gen_mode
== ctl
->data
) {
6226 struct net_device
*dev
;
6228 net
->ipv6
.devconf_dflt
->addr_gen_mode
= new_val
;
6229 for_each_netdev(net
, dev
) {
6230 idev
= __in6_dev_get(dev
);
6232 idev
->cnf
.addr_gen_mode
!= new_val
) {
6233 idev
->cnf
.addr_gen_mode
= new_val
;
6234 addrconf_dev_config(idev
->dev
);
6239 *((u32
*)ctl
->data
) = new_val
;
6248 static int addrconf_sysctl_stable_secret(struct ctl_table
*ctl
, int write
,
6249 void __user
*buffer
, size_t *lenp
,
6253 struct in6_addr addr
;
6254 char str
[IPV6_MAX_STRLEN
];
6255 struct ctl_table lctl
= *ctl
;
6256 struct net
*net
= ctl
->extra2
;
6257 struct ipv6_stable_secret
*secret
= ctl
->data
;
6259 if (&net
->ipv6
.devconf_all
->stable_secret
== ctl
->data
)
6262 lctl
.maxlen
= IPV6_MAX_STRLEN
;
6265 if (!rtnl_trylock())
6266 return restart_syscall();
6268 if (!write
&& !secret
->initialized
) {
6273 err
= snprintf(str
, sizeof(str
), "%pI6", &secret
->secret
);
6274 if (err
>= sizeof(str
)) {
6279 err
= proc_dostring(&lctl
, write
, buffer
, lenp
, ppos
);
6283 if (in6_pton(str
, -1, addr
.in6_u
.u6_addr8
, -1, NULL
) != 1) {
6288 secret
->initialized
= true;
6289 secret
->secret
= addr
;
6291 if (&net
->ipv6
.devconf_dflt
->stable_secret
== ctl
->data
) {
6292 struct net_device
*dev
;
6294 for_each_netdev(net
, dev
) {
6295 struct inet6_dev
*idev
= __in6_dev_get(dev
);
6298 idev
->cnf
.addr_gen_mode
=
6299 IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
6303 struct inet6_dev
*idev
= ctl
->extra1
;
6305 idev
->cnf
.addr_gen_mode
= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
6315 int addrconf_sysctl_ignore_routes_with_linkdown(struct ctl_table
*ctl
,
6317 void __user
*buffer
,
6321 int *valp
= ctl
->data
;
6324 struct ctl_table lctl
;
6327 /* ctl->data points to idev->cnf.ignore_routes_when_linkdown
6328 * we should not modify it until we get the rtnl lock.
6333 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
6336 ret
= addrconf_fixup_linkdown(ctl
, valp
, val
);
6343 void addrconf_set_nopolicy(struct rt6_info
*rt
, int action
)
6347 rt
->dst
.flags
|= DST_NOPOLICY
;
6349 rt
->dst
.flags
&= ~DST_NOPOLICY
;
6354 void addrconf_disable_policy_idev(struct inet6_dev
*idev
, int val
)
6356 struct inet6_ifaddr
*ifa
;
6358 read_lock_bh(&idev
->lock
);
6359 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
6360 spin_lock(&ifa
->lock
);
6362 /* host routes only use builtin fib6_nh */
6363 struct fib6_nh
*nh
= ifa
->rt
->fib6_nh
;
6367 ifa
->rt
->dst_nopolicy
= val
? true : false;
6368 if (nh
->rt6i_pcpu
) {
6369 for_each_possible_cpu(cpu
) {
6370 struct rt6_info
**rtp
;
6372 rtp
= per_cpu_ptr(nh
->rt6i_pcpu
, cpu
);
6373 addrconf_set_nopolicy(*rtp
, val
);
6378 spin_unlock(&ifa
->lock
);
6380 read_unlock_bh(&idev
->lock
);
6384 int addrconf_disable_policy(struct ctl_table
*ctl
, int *valp
, int val
)
6386 struct inet6_dev
*idev
;
6389 if (!rtnl_trylock())
6390 return restart_syscall();
6394 net
= (struct net
*)ctl
->extra2
;
6395 if (valp
== &net
->ipv6
.devconf_dflt
->disable_policy
) {
6400 if (valp
== &net
->ipv6
.devconf_all
->disable_policy
) {
6401 struct net_device
*dev
;
6403 for_each_netdev(net
, dev
) {
6404 idev
= __in6_dev_get(dev
);
6406 addrconf_disable_policy_idev(idev
, val
);
6409 idev
= (struct inet6_dev
*)ctl
->extra1
;
6410 addrconf_disable_policy_idev(idev
, val
);
6418 int addrconf_sysctl_disable_policy(struct ctl_table
*ctl
, int write
,
6419 void __user
*buffer
, size_t *lenp
,
6422 int *valp
= ctl
->data
;
6425 struct ctl_table lctl
;
6430 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
6432 if (write
&& (*valp
!= val
))
6433 ret
= addrconf_disable_policy(ctl
, valp
, val
);
6441 static int minus_one
= -1;
6442 static const int two_five_five
= 255;
6444 static const struct ctl_table addrconf_sysctl
[] = {
6446 .procname
= "forwarding",
6447 .data
= &ipv6_devconf
.forwarding
,
6448 .maxlen
= sizeof(int),
6450 .proc_handler
= addrconf_sysctl_forward
,
6453 .procname
= "hop_limit",
6454 .data
= &ipv6_devconf
.hop_limit
,
6455 .maxlen
= sizeof(int),
6457 .proc_handler
= proc_dointvec_minmax
,
6458 .extra1
= (void *)SYSCTL_ONE
,
6459 .extra2
= (void *)&two_five_five
,
6463 .data
= &ipv6_devconf
.mtu6
,
6464 .maxlen
= sizeof(int),
6466 .proc_handler
= addrconf_sysctl_mtu
,
6469 .procname
= "accept_ra",
6470 .data
= &ipv6_devconf
.accept_ra
,
6471 .maxlen
= sizeof(int),
6473 .proc_handler
= proc_dointvec
,
6476 .procname
= "accept_redirects",
6477 .data
= &ipv6_devconf
.accept_redirects
,
6478 .maxlen
= sizeof(int),
6480 .proc_handler
= proc_dointvec
,
6483 .procname
= "autoconf",
6484 .data
= &ipv6_devconf
.autoconf
,
6485 .maxlen
= sizeof(int),
6487 .proc_handler
= proc_dointvec
,
6490 .procname
= "dad_transmits",
6491 .data
= &ipv6_devconf
.dad_transmits
,
6492 .maxlen
= sizeof(int),
6494 .proc_handler
= proc_dointvec
,
6497 .procname
= "router_solicitations",
6498 .data
= &ipv6_devconf
.rtr_solicits
,
6499 .maxlen
= sizeof(int),
6501 .proc_handler
= proc_dointvec_minmax
,
6502 .extra1
= &minus_one
,
6505 .procname
= "router_solicitation_interval",
6506 .data
= &ipv6_devconf
.rtr_solicit_interval
,
6507 .maxlen
= sizeof(int),
6509 .proc_handler
= proc_dointvec_jiffies
,
6512 .procname
= "router_solicitation_max_interval",
6513 .data
= &ipv6_devconf
.rtr_solicit_max_interval
,
6514 .maxlen
= sizeof(int),
6516 .proc_handler
= proc_dointvec_jiffies
,
6519 .procname
= "router_solicitation_delay",
6520 .data
= &ipv6_devconf
.rtr_solicit_delay
,
6521 .maxlen
= sizeof(int),
6523 .proc_handler
= proc_dointvec_jiffies
,
6526 .procname
= "force_mld_version",
6527 .data
= &ipv6_devconf
.force_mld_version
,
6528 .maxlen
= sizeof(int),
6530 .proc_handler
= proc_dointvec
,
6533 .procname
= "mldv1_unsolicited_report_interval",
6535 &ipv6_devconf
.mldv1_unsolicited_report_interval
,
6536 .maxlen
= sizeof(int),
6538 .proc_handler
= proc_dointvec_ms_jiffies
,
6541 .procname
= "mldv2_unsolicited_report_interval",
6543 &ipv6_devconf
.mldv2_unsolicited_report_interval
,
6544 .maxlen
= sizeof(int),
6546 .proc_handler
= proc_dointvec_ms_jiffies
,
6549 .procname
= "use_tempaddr",
6550 .data
= &ipv6_devconf
.use_tempaddr
,
6551 .maxlen
= sizeof(int),
6553 .proc_handler
= proc_dointvec
,
6556 .procname
= "temp_valid_lft",
6557 .data
= &ipv6_devconf
.temp_valid_lft
,
6558 .maxlen
= sizeof(int),
6560 .proc_handler
= proc_dointvec
,
6563 .procname
= "temp_prefered_lft",
6564 .data
= &ipv6_devconf
.temp_prefered_lft
,
6565 .maxlen
= sizeof(int),
6567 .proc_handler
= proc_dointvec
,
6570 .procname
= "regen_max_retry",
6571 .data
= &ipv6_devconf
.regen_max_retry
,
6572 .maxlen
= sizeof(int),
6574 .proc_handler
= proc_dointvec
,
6577 .procname
= "max_desync_factor",
6578 .data
= &ipv6_devconf
.max_desync_factor
,
6579 .maxlen
= sizeof(int),
6581 .proc_handler
= proc_dointvec
,
6584 .procname
= "max_addresses",
6585 .data
= &ipv6_devconf
.max_addresses
,
6586 .maxlen
= sizeof(int),
6588 .proc_handler
= proc_dointvec
,
6591 .procname
= "accept_ra_defrtr",
6592 .data
= &ipv6_devconf
.accept_ra_defrtr
,
6593 .maxlen
= sizeof(int),
6595 .proc_handler
= proc_dointvec
,
6598 .procname
= "accept_ra_min_hop_limit",
6599 .data
= &ipv6_devconf
.accept_ra_min_hop_limit
,
6600 .maxlen
= sizeof(int),
6602 .proc_handler
= proc_dointvec
,
6605 .procname
= "accept_ra_pinfo",
6606 .data
= &ipv6_devconf
.accept_ra_pinfo
,
6607 .maxlen
= sizeof(int),
6609 .proc_handler
= proc_dointvec
,
6611 #ifdef CONFIG_IPV6_ROUTER_PREF
6613 .procname
= "accept_ra_rtr_pref",
6614 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
6615 .maxlen
= sizeof(int),
6617 .proc_handler
= proc_dointvec
,
6620 .procname
= "router_probe_interval",
6621 .data
= &ipv6_devconf
.rtr_probe_interval
,
6622 .maxlen
= sizeof(int),
6624 .proc_handler
= proc_dointvec_jiffies
,
6626 #ifdef CONFIG_IPV6_ROUTE_INFO
6628 .procname
= "accept_ra_rt_info_min_plen",
6629 .data
= &ipv6_devconf
.accept_ra_rt_info_min_plen
,
6630 .maxlen
= sizeof(int),
6632 .proc_handler
= proc_dointvec
,
6635 .procname
= "accept_ra_rt_info_max_plen",
6636 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
6637 .maxlen
= sizeof(int),
6639 .proc_handler
= proc_dointvec
,
6644 .procname
= "proxy_ndp",
6645 .data
= &ipv6_devconf
.proxy_ndp
,
6646 .maxlen
= sizeof(int),
6648 .proc_handler
= addrconf_sysctl_proxy_ndp
,
6651 .procname
= "accept_source_route",
6652 .data
= &ipv6_devconf
.accept_source_route
,
6653 .maxlen
= sizeof(int),
6655 .proc_handler
= proc_dointvec
,
6657 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
6659 .procname
= "optimistic_dad",
6660 .data
= &ipv6_devconf
.optimistic_dad
,
6661 .maxlen
= sizeof(int),
6663 .proc_handler
= proc_dointvec
,
6666 .procname
= "use_optimistic",
6667 .data
= &ipv6_devconf
.use_optimistic
,
6668 .maxlen
= sizeof(int),
6670 .proc_handler
= proc_dointvec
,
6673 #ifdef CONFIG_IPV6_MROUTE
6675 .procname
= "mc_forwarding",
6676 .data
= &ipv6_devconf
.mc_forwarding
,
6677 .maxlen
= sizeof(int),
6679 .proc_handler
= proc_dointvec
,
6683 .procname
= "disable_ipv6",
6684 .data
= &ipv6_devconf
.disable_ipv6
,
6685 .maxlen
= sizeof(int),
6687 .proc_handler
= addrconf_sysctl_disable
,
6690 .procname
= "accept_dad",
6691 .data
= &ipv6_devconf
.accept_dad
,
6692 .maxlen
= sizeof(int),
6694 .proc_handler
= proc_dointvec
,
6697 .procname
= "force_tllao",
6698 .data
= &ipv6_devconf
.force_tllao
,
6699 .maxlen
= sizeof(int),
6701 .proc_handler
= proc_dointvec
6704 .procname
= "ndisc_notify",
6705 .data
= &ipv6_devconf
.ndisc_notify
,
6706 .maxlen
= sizeof(int),
6708 .proc_handler
= proc_dointvec
6711 .procname
= "suppress_frag_ndisc",
6712 .data
= &ipv6_devconf
.suppress_frag_ndisc
,
6713 .maxlen
= sizeof(int),
6715 .proc_handler
= proc_dointvec
6718 .procname
= "accept_ra_from_local",
6719 .data
= &ipv6_devconf
.accept_ra_from_local
,
6720 .maxlen
= sizeof(int),
6722 .proc_handler
= proc_dointvec
,
6725 .procname
= "accept_ra_mtu",
6726 .data
= &ipv6_devconf
.accept_ra_mtu
,
6727 .maxlen
= sizeof(int),
6729 .proc_handler
= proc_dointvec
,
6732 .procname
= "stable_secret",
6733 .data
= &ipv6_devconf
.stable_secret
,
6734 .maxlen
= IPV6_MAX_STRLEN
,
6736 .proc_handler
= addrconf_sysctl_stable_secret
,
6739 .procname
= "use_oif_addrs_only",
6740 .data
= &ipv6_devconf
.use_oif_addrs_only
,
6741 .maxlen
= sizeof(int),
6743 .proc_handler
= proc_dointvec
,
6746 .procname
= "ignore_routes_with_linkdown",
6747 .data
= &ipv6_devconf
.ignore_routes_with_linkdown
,
6748 .maxlen
= sizeof(int),
6750 .proc_handler
= addrconf_sysctl_ignore_routes_with_linkdown
,
6753 .procname
= "drop_unicast_in_l2_multicast",
6754 .data
= &ipv6_devconf
.drop_unicast_in_l2_multicast
,
6755 .maxlen
= sizeof(int),
6757 .proc_handler
= proc_dointvec
,
6760 .procname
= "drop_unsolicited_na",
6761 .data
= &ipv6_devconf
.drop_unsolicited_na
,
6762 .maxlen
= sizeof(int),
6764 .proc_handler
= proc_dointvec
,
6767 .procname
= "keep_addr_on_down",
6768 .data
= &ipv6_devconf
.keep_addr_on_down
,
6769 .maxlen
= sizeof(int),
6771 .proc_handler
= proc_dointvec
,
6775 .procname
= "seg6_enabled",
6776 .data
= &ipv6_devconf
.seg6_enabled
,
6777 .maxlen
= sizeof(int),
6779 .proc_handler
= proc_dointvec
,
6781 #ifdef CONFIG_IPV6_SEG6_HMAC
6783 .procname
= "seg6_require_hmac",
6784 .data
= &ipv6_devconf
.seg6_require_hmac
,
6785 .maxlen
= sizeof(int),
6787 .proc_handler
= proc_dointvec
,
6791 .procname
= "enhanced_dad",
6792 .data
= &ipv6_devconf
.enhanced_dad
,
6793 .maxlen
= sizeof(int),
6795 .proc_handler
= proc_dointvec
,
6798 .procname
= "addr_gen_mode",
6799 .data
= &ipv6_devconf
.addr_gen_mode
,
6800 .maxlen
= sizeof(int),
6802 .proc_handler
= addrconf_sysctl_addr_gen_mode
,
6805 .procname
= "disable_policy",
6806 .data
= &ipv6_devconf
.disable_policy
,
6807 .maxlen
= sizeof(int),
6809 .proc_handler
= addrconf_sysctl_disable_policy
,
6812 .procname
= "ndisc_tclass",
6813 .data
= &ipv6_devconf
.ndisc_tclass
,
6814 .maxlen
= sizeof(int),
6816 .proc_handler
= proc_dointvec_minmax
,
6817 .extra1
= (void *)SYSCTL_ZERO
,
6818 .extra2
= (void *)&two_five_five
,
6825 static int __addrconf_sysctl_register(struct net
*net
, char *dev_name
,
6826 struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
6829 struct ctl_table
*table
;
6830 char path
[sizeof("net/ipv6/conf/") + IFNAMSIZ
];
6832 table
= kmemdup(addrconf_sysctl
, sizeof(addrconf_sysctl
), GFP_KERNEL
);
6836 for (i
= 0; table
[i
].data
; i
++) {
6837 table
[i
].data
+= (char *)p
- (char *)&ipv6_devconf
;
6838 /* If one of these is already set, then it is not safe to
6839 * overwrite either of them: this makes proc_dointvec_minmax
6842 if (!table
[i
].extra1
&& !table
[i
].extra2
) {
6843 table
[i
].extra1
= idev
; /* embedded; no ref */
6844 table
[i
].extra2
= net
;
6848 snprintf(path
, sizeof(path
), "net/ipv6/conf/%s", dev_name
);
6850 p
->sysctl_header
= register_net_sysctl(net
, path
, table
);
6851 if (!p
->sysctl_header
)
6854 if (!strcmp(dev_name
, "all"))
6855 ifindex
= NETCONFA_IFINDEX_ALL
;
6856 else if (!strcmp(dev_name
, "default"))
6857 ifindex
= NETCONFA_IFINDEX_DEFAULT
;
6859 ifindex
= idev
->dev
->ifindex
;
6860 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
, NETCONFA_ALL
,
6870 static void __addrconf_sysctl_unregister(struct net
*net
,
6871 struct ipv6_devconf
*p
, int ifindex
)
6873 struct ctl_table
*table
;
6875 if (!p
->sysctl_header
)
6878 table
= p
->sysctl_header
->ctl_table_arg
;
6879 unregister_net_sysctl_table(p
->sysctl_header
);
6880 p
->sysctl_header
= NULL
;
6883 inet6_netconf_notify_devconf(net
, RTM_DELNETCONF
, 0, ifindex
, NULL
);
6886 static int addrconf_sysctl_register(struct inet6_dev
*idev
)
6890 if (!sysctl_dev_name_is_allowed(idev
->dev
->name
))
6893 err
= neigh_sysctl_register(idev
->dev
, idev
->nd_parms
,
6894 &ndisc_ifinfo_sysctl_change
);
6897 err
= __addrconf_sysctl_register(dev_net(idev
->dev
), idev
->dev
->name
,
6900 neigh_sysctl_unregister(idev
->nd_parms
);
6905 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
6907 __addrconf_sysctl_unregister(dev_net(idev
->dev
), &idev
->cnf
,
6908 idev
->dev
->ifindex
);
6909 neigh_sysctl_unregister(idev
->nd_parms
);
6915 static int __net_init
addrconf_init_net(struct net
*net
)
6918 struct ipv6_devconf
*all
, *dflt
;
6920 all
= kmemdup(&ipv6_devconf
, sizeof(ipv6_devconf
), GFP_KERNEL
);
6924 dflt
= kmemdup(&ipv6_devconf_dflt
, sizeof(ipv6_devconf_dflt
), GFP_KERNEL
);
6926 goto err_alloc_dflt
;
6928 if (IS_ENABLED(CONFIG_SYSCTL
) &&
6929 sysctl_devconf_inherit_init_net
== 1 && !net_eq(net
, &init_net
)) {
6930 memcpy(all
, init_net
.ipv6
.devconf_all
, sizeof(ipv6_devconf
));
6931 memcpy(dflt
, init_net
.ipv6
.devconf_dflt
, sizeof(ipv6_devconf_dflt
));
6934 /* these will be inherited by all namespaces */
6935 dflt
->autoconf
= ipv6_defaults
.autoconf
;
6936 dflt
->disable_ipv6
= ipv6_defaults
.disable_ipv6
;
6938 dflt
->stable_secret
.initialized
= false;
6939 all
->stable_secret
.initialized
= false;
6941 net
->ipv6
.devconf_all
= all
;
6942 net
->ipv6
.devconf_dflt
= dflt
;
6944 #ifdef CONFIG_SYSCTL
6945 err
= __addrconf_sysctl_register(net
, "all", NULL
, all
);
6949 err
= __addrconf_sysctl_register(net
, "default", NULL
, dflt
);
6955 #ifdef CONFIG_SYSCTL
6957 __addrconf_sysctl_unregister(net
, all
, NETCONFA_IFINDEX_ALL
);
6967 static void __net_exit
addrconf_exit_net(struct net
*net
)
6969 #ifdef CONFIG_SYSCTL
6970 __addrconf_sysctl_unregister(net
, net
->ipv6
.devconf_dflt
,
6971 NETCONFA_IFINDEX_DEFAULT
);
6972 __addrconf_sysctl_unregister(net
, net
->ipv6
.devconf_all
,
6973 NETCONFA_IFINDEX_ALL
);
6975 kfree(net
->ipv6
.devconf_dflt
);
6976 kfree(net
->ipv6
.devconf_all
);
6979 static struct pernet_operations addrconf_ops
= {
6980 .init
= addrconf_init_net
,
6981 .exit
= addrconf_exit_net
,
6984 static struct rtnl_af_ops inet6_ops __read_mostly
= {
6986 .fill_link_af
= inet6_fill_link_af
,
6987 .get_link_af_size
= inet6_get_link_af_size
,
6988 .validate_link_af
= inet6_validate_link_af
,
6989 .set_link_af
= inet6_set_link_af
,
6993 * Init / cleanup code
6996 int __init
addrconf_init(void)
6998 struct inet6_dev
*idev
;
7001 err
= ipv6_addr_label_init();
7003 pr_crit("%s: cannot initialize default policy table: %d\n",
7008 err
= register_pernet_subsys(&addrconf_ops
);
7012 addrconf_wq
= create_workqueue("ipv6_addrconf");
7018 /* The addrconf netdev notifier requires that loopback_dev
7019 * has it's ipv6 private information allocated and setup
7020 * before it can bring up and give link-local addresses
7021 * to other devices which are up.
7023 * Unfortunately, loopback_dev is not necessarily the first
7024 * entry in the global dev_base list of net devices. In fact,
7025 * it is likely to be the very last entry on that list.
7026 * So this causes the notifier registry below to try and
7027 * give link-local addresses to all devices besides loopback_dev
7028 * first, then loopback_dev, which cases all the non-loopback_dev
7029 * devices to fail to get a link-local address.
7031 * So, as a temporary fix, allocate the ipv6 structure for
7032 * loopback_dev first by hand.
7033 * Longer term, all of the dependencies ipv6 has upon the loopback
7034 * device and it being up should be removed.
7037 idev
= ipv6_add_dev(init_net
.loopback_dev
);
7040 err
= PTR_ERR(idev
);
7044 ip6_route_init_special_entries();
7046 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
7047 INIT_HLIST_HEAD(&inet6_addr_lst
[i
]);
7049 register_netdevice_notifier(&ipv6_dev_notf
);
7053 rtnl_af_register(&inet6_ops
);
7055 err
= rtnl_register_module(THIS_MODULE
, PF_INET6
, RTM_GETLINK
,
7056 NULL
, inet6_dump_ifinfo
, 0);
7060 err
= rtnl_register_module(THIS_MODULE
, PF_INET6
, RTM_NEWADDR
,
7061 inet6_rtm_newaddr
, NULL
, 0);
7064 err
= rtnl_register_module(THIS_MODULE
, PF_INET6
, RTM_DELADDR
,
7065 inet6_rtm_deladdr
, NULL
, 0);
7068 err
= rtnl_register_module(THIS_MODULE
, PF_INET6
, RTM_GETADDR
,
7069 inet6_rtm_getaddr
, inet6_dump_ifaddr
,
7070 RTNL_FLAG_DOIT_UNLOCKED
);
7073 err
= rtnl_register_module(THIS_MODULE
, PF_INET6
, RTM_GETMULTICAST
,
7074 NULL
, inet6_dump_ifmcaddr
, 0);
7077 err
= rtnl_register_module(THIS_MODULE
, PF_INET6
, RTM_GETANYCAST
,
7078 NULL
, inet6_dump_ifacaddr
, 0);
7081 err
= rtnl_register_module(THIS_MODULE
, PF_INET6
, RTM_GETNETCONF
,
7082 inet6_netconf_get_devconf
,
7083 inet6_netconf_dump_devconf
,
7084 RTNL_FLAG_DOIT_UNLOCKED
);
7087 err
= ipv6_addr_label_rtnl_register();
7093 rtnl_unregister_all(PF_INET6
);
7094 rtnl_af_unregister(&inet6_ops
);
7095 unregister_netdevice_notifier(&ipv6_dev_notf
);
7097 destroy_workqueue(addrconf_wq
);
7099 unregister_pernet_subsys(&addrconf_ops
);
7101 ipv6_addr_label_cleanup();
7106 void addrconf_cleanup(void)
7108 struct net_device
*dev
;
7111 unregister_netdevice_notifier(&ipv6_dev_notf
);
7112 unregister_pernet_subsys(&addrconf_ops
);
7113 ipv6_addr_label_cleanup();
7115 rtnl_af_unregister(&inet6_ops
);
7119 /* clean dev list */
7120 for_each_netdev(&init_net
, dev
) {
7121 if (__in6_dev_get(dev
) == NULL
)
7123 addrconf_ifdown(dev
, 1);
7125 addrconf_ifdown(init_net
.loopback_dev
, 2);
7130 spin_lock_bh(&addrconf_hash_lock
);
7131 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
7132 WARN_ON(!hlist_empty(&inet6_addr_lst
[i
]));
7133 spin_unlock_bh(&addrconf_hash_lock
);
7134 cancel_delayed_work(&addr_chk_work
);
7137 destroy_workqueue(addrconf_wq
);