2 * IPv6 Address [auto]configuration
3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
18 * Janos Farkas : delete timer on ifdown
19 * <chexum@bankinf.banki.hu>
20 * Andi Kleen : kill double kfree on module
22 * Maciej W. Rozycki : FDDI support
23 * sekiya@USAGI : Don't send too many RS
25 * yoshfuji@USAGI : Fixed interval between DAD
27 * YOSHIFUJI Hideaki @USAGI : improved accuracy of
28 * address validation timer.
29 * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
31 * Yuji SEKIYA @USAGI : Don't assign a same IPv6
32 * address on a same interface.
33 * YOSHIFUJI Hideaki @USAGI : ARCnet support
34 * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
36 * YOSHIFUJI Hideaki @USAGI : improved source address
37 * selection; consider scope,
41 #define pr_fmt(fmt) "IPv6: " fmt
43 #include <linux/errno.h>
44 #include <linux/types.h>
45 #include <linux/kernel.h>
46 #include <linux/socket.h>
47 #include <linux/sockios.h>
48 #include <linux/net.h>
49 #include <linux/inet.h>
50 #include <linux/in6.h>
51 #include <linux/netdevice.h>
52 #include <linux/if_addr.h>
53 #include <linux/if_arp.h>
54 #include <linux/if_arcnet.h>
55 #include <linux/if_infiniband.h>
56 #include <linux/route.h>
57 #include <linux/inetdevice.h>
58 #include <linux/init.h>
59 #include <linux/slab.h>
61 #include <linux/sysctl.h>
63 #include <linux/capability.h>
64 #include <linux/delay.h>
65 #include <linux/notifier.h>
66 #include <linux/string.h>
67 #include <linux/hash.h>
69 #include <net/net_namespace.h>
73 #include <net/af_ieee802154.h>
74 #include <net/firewire.h>
76 #include <net/protocol.h>
77 #include <net/ndisc.h>
78 #include <net/ip6_route.h>
79 #include <net/addrconf.h>
82 #include <net/netlink.h>
83 #include <net/pkt_sched.h>
84 #include <linux/if_tunnel.h>
85 #include <linux/rtnetlink.h>
86 #include <linux/netconf.h>
87 #include <linux/random.h>
88 #include <linux/uaccess.h>
89 #include <asm/unaligned.h>
91 #include <linux/proc_fs.h>
92 #include <linux/seq_file.h>
93 #include <linux/export.h>
95 /* Set to 3 to get tracing... */
99 #define ADBG(fmt, ...) printk(fmt, ##__VA_ARGS__)
101 #define ADBG(fmt, ...) do { if (0) printk(fmt, ##__VA_ARGS__); } while (0)
104 #define INFINITY_LIFE_TIME 0xFFFFFFFF
106 #define IPV6_MAX_STRLEN \
107 sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255")
109 static inline u32
cstamp_delta(unsigned long cstamp
)
111 return (cstamp
- INITIAL_JIFFIES
) * 100UL / HZ
;
115 static int addrconf_sysctl_register(struct inet6_dev
*idev
);
116 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
);
118 static inline int addrconf_sysctl_register(struct inet6_dev
*idev
)
123 static inline void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
128 static void __ipv6_regen_rndid(struct inet6_dev
*idev
);
129 static void __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
130 static void ipv6_regen_rndid(unsigned long data
);
132 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
);
133 static int ipv6_count_addresses(struct inet6_dev
*idev
);
134 static int ipv6_generate_stable_address(struct in6_addr
*addr
,
136 const struct inet6_dev
*idev
);
139 * Configured unicast address hash table
141 static struct hlist_head inet6_addr_lst
[IN6_ADDR_HSIZE
];
142 static DEFINE_SPINLOCK(addrconf_hash_lock
);
144 static void addrconf_verify(void);
145 static void addrconf_verify_rtnl(void);
146 static void addrconf_verify_work(struct work_struct
*);
148 static struct workqueue_struct
*addrconf_wq
;
149 static DECLARE_DELAYED_WORK(addr_chk_work
, addrconf_verify_work
);
151 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
152 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
154 static void addrconf_type_change(struct net_device
*dev
,
155 unsigned long event
);
156 static int addrconf_ifdown(struct net_device
*dev
, int how
);
158 static struct rt6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
160 const struct net_device
*dev
,
161 u32 flags
, u32 noflags
);
163 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
);
164 static void addrconf_dad_work(struct work_struct
*w
);
165 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
);
166 static void addrconf_dad_run(struct inet6_dev
*idev
);
167 static void addrconf_rs_timer(unsigned long data
);
168 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
169 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
171 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
172 struct prefix_info
*pinfo
);
173 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
174 struct net_device
*dev
);
176 static struct ipv6_devconf ipv6_devconf __read_mostly
= {
178 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
179 .mtu6
= IPV6_MIN_MTU
,
181 .accept_redirects
= 1,
183 .force_mld_version
= 0,
184 .mldv1_unsolicited_report_interval
= 10 * HZ
,
185 .mldv2_unsolicited_report_interval
= HZ
,
187 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
188 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
189 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
191 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
192 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
193 .regen_max_retry
= REGEN_MAX_RETRY
,
194 .max_desync_factor
= MAX_DESYNC_FACTOR
,
195 .max_addresses
= IPV6_MAX_ADDRESSES
,
196 .accept_ra_defrtr
= 1,
197 .accept_ra_from_local
= 0,
198 .accept_ra_min_hop_limit
= 1,
199 .accept_ra_pinfo
= 1,
200 #ifdef CONFIG_IPV6_ROUTER_PREF
201 .accept_ra_rtr_pref
= 1,
202 .rtr_probe_interval
= 60 * HZ
,
203 #ifdef CONFIG_IPV6_ROUTE_INFO
204 .accept_ra_rt_info_max_plen
= 0,
208 .accept_source_route
= 0, /* we do not accept RH0 by default. */
211 .suppress_frag_ndisc
= 1,
214 .initialized
= false,
216 .use_oif_addrs_only
= 0,
219 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly
= {
221 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
222 .mtu6
= IPV6_MIN_MTU
,
224 .accept_redirects
= 1,
226 .force_mld_version
= 0,
227 .mldv1_unsolicited_report_interval
= 10 * HZ
,
228 .mldv2_unsolicited_report_interval
= HZ
,
230 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
231 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
232 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
234 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
235 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
236 .regen_max_retry
= REGEN_MAX_RETRY
,
237 .max_desync_factor
= MAX_DESYNC_FACTOR
,
238 .max_addresses
= IPV6_MAX_ADDRESSES
,
239 .accept_ra_defrtr
= 1,
240 .accept_ra_from_local
= 0,
241 .accept_ra_min_hop_limit
= 1,
242 .accept_ra_pinfo
= 1,
243 #ifdef CONFIG_IPV6_ROUTER_PREF
244 .accept_ra_rtr_pref
= 1,
245 .rtr_probe_interval
= 60 * HZ
,
246 #ifdef CONFIG_IPV6_ROUTE_INFO
247 .accept_ra_rt_info_max_plen
= 0,
251 .accept_source_route
= 0, /* we do not accept RH0 by default. */
254 .suppress_frag_ndisc
= 1,
257 .initialized
= false,
259 .use_oif_addrs_only
= 0,
262 /* Check if a valid qdisc is available */
263 static inline bool addrconf_qdisc_ok(const struct net_device
*dev
)
265 return !qdisc_tx_is_noop(dev
);
268 static void addrconf_del_rs_timer(struct inet6_dev
*idev
)
270 if (del_timer(&idev
->rs_timer
))
274 static void addrconf_del_dad_work(struct inet6_ifaddr
*ifp
)
276 if (cancel_delayed_work(&ifp
->dad_work
))
280 static void addrconf_mod_rs_timer(struct inet6_dev
*idev
,
283 if (!timer_pending(&idev
->rs_timer
))
285 mod_timer(&idev
->rs_timer
, jiffies
+ when
);
288 static void addrconf_mod_dad_work(struct inet6_ifaddr
*ifp
,
291 if (!delayed_work_pending(&ifp
->dad_work
))
293 mod_delayed_work(addrconf_wq
, &ifp
->dad_work
, delay
);
296 static int snmp6_alloc_dev(struct inet6_dev
*idev
)
300 idev
->stats
.ipv6
= alloc_percpu(struct ipstats_mib
);
301 if (!idev
->stats
.ipv6
)
304 for_each_possible_cpu(i
) {
305 struct ipstats_mib
*addrconf_stats
;
306 addrconf_stats
= per_cpu_ptr(idev
->stats
.ipv6
, i
);
307 u64_stats_init(&addrconf_stats
->syncp
);
311 idev
->stats
.icmpv6dev
= kzalloc(sizeof(struct icmpv6_mib_device
),
313 if (!idev
->stats
.icmpv6dev
)
315 idev
->stats
.icmpv6msgdev
= kzalloc(sizeof(struct icmpv6msg_mib_device
),
317 if (!idev
->stats
.icmpv6msgdev
)
323 kfree(idev
->stats
.icmpv6dev
);
325 free_percpu(idev
->stats
.ipv6
);
330 static struct inet6_dev
*ipv6_add_dev(struct net_device
*dev
)
332 struct inet6_dev
*ndev
;
337 if (dev
->mtu
< IPV6_MIN_MTU
)
338 return ERR_PTR(-EINVAL
);
340 ndev
= kzalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
344 rwlock_init(&ndev
->lock
);
346 INIT_LIST_HEAD(&ndev
->addr_list
);
347 setup_timer(&ndev
->rs_timer
, addrconf_rs_timer
,
348 (unsigned long)ndev
);
349 memcpy(&ndev
->cnf
, dev_net(dev
)->ipv6
.devconf_dflt
, sizeof(ndev
->cnf
));
350 ndev
->cnf
.mtu6
= dev
->mtu
;
351 ndev
->cnf
.sysctl
= NULL
;
352 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
353 if (!ndev
->nd_parms
) {
357 if (ndev
->cnf
.forwarding
)
358 dev_disable_lro(dev
);
359 /* We refer to the device */
362 if (snmp6_alloc_dev(ndev
) < 0) {
364 "%s: cannot allocate memory for statistics; dev=%s.\n",
365 __func__
, dev
->name
);
366 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
372 if (snmp6_register_dev(ndev
) < 0) {
374 "%s: cannot create /proc/net/dev_snmp6/%s\n",
375 __func__
, dev
->name
);
379 /* One reference from device. We must do this before
380 * we invoke __ipv6_regen_rndid().
384 if (dev
->flags
& (IFF_NOARP
| IFF_LOOPBACK
))
385 ndev
->cnf
.accept_dad
= -1;
387 #if IS_ENABLED(CONFIG_IPV6_SIT)
388 if (dev
->type
== ARPHRD_SIT
&& (dev
->priv_flags
& IFF_ISATAP
)) {
389 pr_info("%s: Disabled Multicast RS\n", dev
->name
);
390 ndev
->cnf
.rtr_solicits
= 0;
394 INIT_LIST_HEAD(&ndev
->tempaddr_list
);
395 setup_timer(&ndev
->regen_timer
, ipv6_regen_rndid
, (unsigned long)ndev
);
396 if ((dev
->flags
&IFF_LOOPBACK
) ||
397 dev
->type
== ARPHRD_TUNNEL
||
398 dev
->type
== ARPHRD_TUNNEL6
||
399 dev
->type
== ARPHRD_SIT
||
400 dev
->type
== ARPHRD_NONE
) {
401 ndev
->cnf
.use_tempaddr
= -1;
404 ipv6_regen_rndid((unsigned long) ndev
);
407 ndev
->token
= in6addr_any
;
409 if (netif_running(dev
) && addrconf_qdisc_ok(dev
))
410 ndev
->if_flags
|= IF_READY
;
412 ipv6_mc_init_dev(ndev
);
413 ndev
->tstamp
= jiffies
;
414 err
= addrconf_sysctl_register(ndev
);
416 ipv6_mc_destroy_dev(ndev
);
417 del_timer(&ndev
->regen_timer
);
420 /* protected by rtnl_lock */
421 rcu_assign_pointer(dev
->ip6_ptr
, ndev
);
423 /* Join interface-local all-node multicast group */
424 ipv6_dev_mc_inc(dev
, &in6addr_interfacelocal_allnodes
);
426 /* Join all-node multicast group */
427 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allnodes
);
429 /* Join all-router multicast group if forwarding is set */
430 if (ndev
->cnf
.forwarding
&& (dev
->flags
& IFF_MULTICAST
))
431 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
436 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
438 in6_dev_finish_destroy(ndev
);
442 static struct inet6_dev
*ipv6_find_idev(struct net_device
*dev
)
444 struct inet6_dev
*idev
;
448 idev
= __in6_dev_get(dev
);
450 idev
= ipv6_add_dev(dev
);
455 if (dev
->flags
&IFF_UP
)
460 static int inet6_netconf_msgsize_devconf(int type
)
462 int size
= NLMSG_ALIGN(sizeof(struct netconfmsg
))
463 + nla_total_size(4); /* NETCONFA_IFINDEX */
465 /* type -1 is used for ALL */
466 if (type
== -1 || type
== NETCONFA_FORWARDING
)
467 size
+= nla_total_size(4);
468 #ifdef CONFIG_IPV6_MROUTE
469 if (type
== -1 || type
== NETCONFA_MC_FORWARDING
)
470 size
+= nla_total_size(4);
472 if (type
== -1 || type
== NETCONFA_PROXY_NEIGH
)
473 size
+= nla_total_size(4);
478 static int inet6_netconf_fill_devconf(struct sk_buff
*skb
, int ifindex
,
479 struct ipv6_devconf
*devconf
, u32 portid
,
480 u32 seq
, int event
, unsigned int flags
,
483 struct nlmsghdr
*nlh
;
484 struct netconfmsg
*ncm
;
486 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct netconfmsg
),
491 ncm
= nlmsg_data(nlh
);
492 ncm
->ncm_family
= AF_INET6
;
494 if (nla_put_s32(skb
, NETCONFA_IFINDEX
, ifindex
) < 0)
495 goto nla_put_failure
;
497 /* type -1 is used for ALL */
498 if ((type
== -1 || type
== NETCONFA_FORWARDING
) &&
499 nla_put_s32(skb
, NETCONFA_FORWARDING
, devconf
->forwarding
) < 0)
500 goto nla_put_failure
;
501 #ifdef CONFIG_IPV6_MROUTE
502 if ((type
== -1 || type
== NETCONFA_MC_FORWARDING
) &&
503 nla_put_s32(skb
, NETCONFA_MC_FORWARDING
,
504 devconf
->mc_forwarding
) < 0)
505 goto nla_put_failure
;
507 if ((type
== -1 || type
== NETCONFA_PROXY_NEIGH
) &&
508 nla_put_s32(skb
, NETCONFA_PROXY_NEIGH
, devconf
->proxy_ndp
) < 0)
509 goto nla_put_failure
;
515 nlmsg_cancel(skb
, nlh
);
519 void inet6_netconf_notify_devconf(struct net
*net
, int type
, int ifindex
,
520 struct ipv6_devconf
*devconf
)
525 skb
= nlmsg_new(inet6_netconf_msgsize_devconf(type
), GFP_ATOMIC
);
529 err
= inet6_netconf_fill_devconf(skb
, ifindex
, devconf
, 0, 0,
530 RTM_NEWNETCONF
, 0, type
);
532 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
533 WARN_ON(err
== -EMSGSIZE
);
537 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_NETCONF
, NULL
, GFP_ATOMIC
);
540 rtnl_set_sk_err(net
, RTNLGRP_IPV6_NETCONF
, err
);
543 static const struct nla_policy devconf_ipv6_policy
[NETCONFA_MAX
+1] = {
544 [NETCONFA_IFINDEX
] = { .len
= sizeof(int) },
545 [NETCONFA_FORWARDING
] = { .len
= sizeof(int) },
546 [NETCONFA_PROXY_NEIGH
] = { .len
= sizeof(int) },
549 static int inet6_netconf_get_devconf(struct sk_buff
*in_skb
,
550 struct nlmsghdr
*nlh
)
552 struct net
*net
= sock_net(in_skb
->sk
);
553 struct nlattr
*tb
[NETCONFA_MAX
+1];
554 struct netconfmsg
*ncm
;
556 struct ipv6_devconf
*devconf
;
557 struct inet6_dev
*in6_dev
;
558 struct net_device
*dev
;
562 err
= nlmsg_parse(nlh
, sizeof(*ncm
), tb
, NETCONFA_MAX
,
563 devconf_ipv6_policy
);
568 if (!tb
[NETCONFA_IFINDEX
])
571 ifindex
= nla_get_s32(tb
[NETCONFA_IFINDEX
]);
573 case NETCONFA_IFINDEX_ALL
:
574 devconf
= net
->ipv6
.devconf_all
;
576 case NETCONFA_IFINDEX_DEFAULT
:
577 devconf
= net
->ipv6
.devconf_dflt
;
580 dev
= __dev_get_by_index(net
, ifindex
);
583 in6_dev
= __in6_dev_get(dev
);
586 devconf
= &in6_dev
->cnf
;
591 skb
= nlmsg_new(inet6_netconf_msgsize_devconf(-1), GFP_ATOMIC
);
595 err
= inet6_netconf_fill_devconf(skb
, ifindex
, devconf
,
596 NETLINK_CB(in_skb
).portid
,
597 nlh
->nlmsg_seq
, RTM_NEWNETCONF
, 0,
600 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
601 WARN_ON(err
== -EMSGSIZE
);
605 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).portid
);
610 static int inet6_netconf_dump_devconf(struct sk_buff
*skb
,
611 struct netlink_callback
*cb
)
613 struct net
*net
= sock_net(skb
->sk
);
616 struct net_device
*dev
;
617 struct inet6_dev
*idev
;
618 struct hlist_head
*head
;
621 s_idx
= idx
= cb
->args
[1];
623 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
625 head
= &net
->dev_index_head
[h
];
627 cb
->seq
= atomic_read(&net
->ipv6
.dev_addr_genid
) ^
629 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
632 idev
= __in6_dev_get(dev
);
636 if (inet6_netconf_fill_devconf(skb
, dev
->ifindex
,
638 NETLINK_CB(cb
->skb
).portid
,
646 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
652 if (h
== NETDEV_HASHENTRIES
) {
653 if (inet6_netconf_fill_devconf(skb
, NETCONFA_IFINDEX_ALL
,
654 net
->ipv6
.devconf_all
,
655 NETLINK_CB(cb
->skb
).portid
,
657 RTM_NEWNETCONF
, NLM_F_MULTI
,
663 if (h
== NETDEV_HASHENTRIES
+ 1) {
664 if (inet6_netconf_fill_devconf(skb
, NETCONFA_IFINDEX_DEFAULT
,
665 net
->ipv6
.devconf_dflt
,
666 NETLINK_CB(cb
->skb
).portid
,
668 RTM_NEWNETCONF
, NLM_F_MULTI
,
682 static void dev_forward_change(struct inet6_dev
*idev
)
684 struct net_device
*dev
;
685 struct inet6_ifaddr
*ifa
;
690 if (idev
->cnf
.forwarding
)
691 dev_disable_lro(dev
);
692 if (dev
->flags
& IFF_MULTICAST
) {
693 if (idev
->cnf
.forwarding
) {
694 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
695 ipv6_dev_mc_inc(dev
, &in6addr_interfacelocal_allrouters
);
696 ipv6_dev_mc_inc(dev
, &in6addr_sitelocal_allrouters
);
698 ipv6_dev_mc_dec(dev
, &in6addr_linklocal_allrouters
);
699 ipv6_dev_mc_dec(dev
, &in6addr_interfacelocal_allrouters
);
700 ipv6_dev_mc_dec(dev
, &in6addr_sitelocal_allrouters
);
704 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
705 if (ifa
->flags
&IFA_F_TENTATIVE
)
707 if (idev
->cnf
.forwarding
)
708 addrconf_join_anycast(ifa
);
710 addrconf_leave_anycast(ifa
);
712 inet6_netconf_notify_devconf(dev_net(dev
), NETCONFA_FORWARDING
,
713 dev
->ifindex
, &idev
->cnf
);
717 static void addrconf_forward_change(struct net
*net
, __s32 newf
)
719 struct net_device
*dev
;
720 struct inet6_dev
*idev
;
722 for_each_netdev(net
, dev
) {
723 idev
= __in6_dev_get(dev
);
725 int changed
= (!idev
->cnf
.forwarding
) ^ (!newf
);
726 idev
->cnf
.forwarding
= newf
;
728 dev_forward_change(idev
);
733 static int addrconf_fixup_forwarding(struct ctl_table
*table
, int *p
, int newf
)
739 return restart_syscall();
741 net
= (struct net
*)table
->extra2
;
745 if (p
== &net
->ipv6
.devconf_dflt
->forwarding
) {
746 if ((!newf
) ^ (!old
))
747 inet6_netconf_notify_devconf(net
, NETCONFA_FORWARDING
,
748 NETCONFA_IFINDEX_DEFAULT
,
749 net
->ipv6
.devconf_dflt
);
754 if (p
== &net
->ipv6
.devconf_all
->forwarding
) {
755 net
->ipv6
.devconf_dflt
->forwarding
= newf
;
756 addrconf_forward_change(net
, newf
);
757 if ((!newf
) ^ (!old
))
758 inet6_netconf_notify_devconf(net
, NETCONFA_FORWARDING
,
759 NETCONFA_IFINDEX_ALL
,
760 net
->ipv6
.devconf_all
);
761 } else if ((!newf
) ^ (!old
))
762 dev_forward_change((struct inet6_dev
*)table
->extra1
);
766 rt6_purge_dflt_routers(net
);
771 /* Nobody refers to this ifaddr, destroy it */
772 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
774 WARN_ON(!hlist_unhashed(&ifp
->addr_lst
));
776 #ifdef NET_REFCNT_DEBUG
777 pr_debug("%s\n", __func__
);
780 in6_dev_put(ifp
->idev
);
782 if (cancel_delayed_work(&ifp
->dad_work
))
783 pr_notice("delayed DAD work was pending while freeing ifa=%p\n",
786 if (ifp
->state
!= INET6_IFADDR_STATE_DEAD
) {
787 pr_warn("Freeing alive inet6 address %p\n", ifp
);
796 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
799 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
802 * Each device address list is sorted in order of scope -
803 * global before linklocal.
805 list_for_each(p
, &idev
->addr_list
) {
806 struct inet6_ifaddr
*ifa
807 = list_entry(p
, struct inet6_ifaddr
, if_list
);
808 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
812 list_add_tail(&ifp
->if_list
, p
);
815 static u32
inet6_addr_hash(const struct in6_addr
*addr
)
817 return hash_32(ipv6_addr_hash(addr
), IN6_ADDR_HSIZE_SHIFT
);
820 /* On success it returns ifp with increased reference count */
822 static struct inet6_ifaddr
*
823 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
824 const struct in6_addr
*peer_addr
, int pfxlen
,
825 int scope
, u32 flags
, u32 valid_lft
, u32 prefered_lft
)
827 struct inet6_ifaddr
*ifa
= NULL
;
831 int addr_type
= ipv6_addr_type(addr
);
833 if (addr_type
== IPV6_ADDR_ANY
||
834 addr_type
& IPV6_ADDR_MULTICAST
||
835 (!(idev
->dev
->flags
& IFF_LOOPBACK
) &&
836 addr_type
& IPV6_ADDR_LOOPBACK
))
837 return ERR_PTR(-EADDRNOTAVAIL
);
841 err
= -ENODEV
; /*XXX*/
845 if (idev
->cnf
.disable_ipv6
) {
850 spin_lock(&addrconf_hash_lock
);
852 /* Ignore adding duplicate addresses on an interface */
853 if (ipv6_chk_same_addr(dev_net(idev
->dev
), addr
, idev
->dev
)) {
854 ADBG("ipv6_add_addr: already assigned\n");
859 ifa
= kzalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
862 ADBG("ipv6_add_addr: malloc failed\n");
867 rt
= addrconf_dst_alloc(idev
, addr
, false);
873 neigh_parms_data_state_setall(idev
->nd_parms
);
877 ifa
->peer_addr
= *peer_addr
;
879 spin_lock_init(&ifa
->lock
);
880 INIT_DELAYED_WORK(&ifa
->dad_work
, addrconf_dad_work
);
881 INIT_HLIST_NODE(&ifa
->addr_lst
);
883 ifa
->prefix_len
= pfxlen
;
884 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
885 ifa
->valid_lft
= valid_lft
;
886 ifa
->prefered_lft
= prefered_lft
;
887 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
888 ifa
->tokenized
= false;
897 /* Add to big hash table */
898 hash
= inet6_addr_hash(addr
);
900 hlist_add_head_rcu(&ifa
->addr_lst
, &inet6_addr_lst
[hash
]);
901 spin_unlock(&addrconf_hash_lock
);
903 write_lock(&idev
->lock
);
904 /* Add to inet6_dev unicast addr list. */
905 ipv6_link_dev_addr(idev
, ifa
);
907 if (ifa
->flags
&IFA_F_TEMPORARY
) {
908 list_add(&ifa
->tmp_list
, &idev
->tempaddr_list
);
913 write_unlock(&idev
->lock
);
915 rcu_read_unlock_bh();
917 if (likely(err
== 0))
918 inet6addr_notifier_call_chain(NETDEV_UP
, ifa
);
926 spin_unlock(&addrconf_hash_lock
);
930 enum cleanup_prefix_rt_t
{
931 CLEANUP_PREFIX_RT_NOP
, /* no cleanup action for prefix route */
932 CLEANUP_PREFIX_RT_DEL
, /* delete the prefix route */
933 CLEANUP_PREFIX_RT_EXPIRE
, /* update the lifetime of the prefix route */
937 * Check, whether the prefix for ifp would still need a prefix route
938 * after deleting ifp. The function returns one of the CLEANUP_PREFIX_RT_*
941 * 1) we don't purge prefix if address was not permanent.
942 * prefix is managed by its own lifetime.
943 * 2) we also don't purge, if the address was IFA_F_NOPREFIXROUTE.
944 * 3) if there are no addresses, delete prefix.
945 * 4) if there are still other permanent address(es),
946 * corresponding prefix is still permanent.
947 * 5) if there are still other addresses with IFA_F_NOPREFIXROUTE,
948 * don't purge the prefix, assume user space is managing it.
949 * 6) otherwise, update prefix lifetime to the
950 * longest valid lifetime among the corresponding
951 * addresses on the device.
952 * Note: subsequent RA will update lifetime.
954 static enum cleanup_prefix_rt_t
955 check_cleanup_prefix_route(struct inet6_ifaddr
*ifp
, unsigned long *expires
)
957 struct inet6_ifaddr
*ifa
;
958 struct inet6_dev
*idev
= ifp
->idev
;
959 unsigned long lifetime
;
960 enum cleanup_prefix_rt_t action
= CLEANUP_PREFIX_RT_DEL
;
964 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
967 if (!ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
970 if (ifa
->flags
& (IFA_F_PERMANENT
| IFA_F_NOPREFIXROUTE
))
971 return CLEANUP_PREFIX_RT_NOP
;
973 action
= CLEANUP_PREFIX_RT_EXPIRE
;
975 spin_lock(&ifa
->lock
);
977 lifetime
= addrconf_timeout_fixup(ifa
->valid_lft
, HZ
);
979 * Note: Because this address is
980 * not permanent, lifetime <
981 * LONG_MAX / HZ here.
983 if (time_before(*expires
, ifa
->tstamp
+ lifetime
* HZ
))
984 *expires
= ifa
->tstamp
+ lifetime
* HZ
;
985 spin_unlock(&ifa
->lock
);
992 cleanup_prefix_route(struct inet6_ifaddr
*ifp
, unsigned long expires
, bool del_rt
)
996 rt
= addrconf_get_prefix_route(&ifp
->addr
,
999 0, RTF_GATEWAY
| RTF_DEFAULT
);
1004 if (!(rt
->rt6i_flags
& RTF_EXPIRES
))
1005 rt6_set_expires(rt
, expires
);
1012 /* This function wants to get referenced ifp and releases it before return */
1014 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
1017 enum cleanup_prefix_rt_t action
= CLEANUP_PREFIX_RT_NOP
;
1018 unsigned long expires
;
1022 spin_lock_bh(&ifp
->lock
);
1024 ifp
->state
= INET6_IFADDR_STATE_DEAD
;
1025 spin_unlock_bh(&ifp
->lock
);
1027 if (state
== INET6_IFADDR_STATE_DEAD
)
1030 spin_lock_bh(&addrconf_hash_lock
);
1031 hlist_del_init_rcu(&ifp
->addr_lst
);
1032 spin_unlock_bh(&addrconf_hash_lock
);
1034 write_lock_bh(&ifp
->idev
->lock
);
1036 if (ifp
->flags
&IFA_F_TEMPORARY
) {
1037 list_del(&ifp
->tmp_list
);
1039 in6_ifa_put(ifp
->ifpub
);
1045 if (ifp
->flags
& IFA_F_PERMANENT
&& !(ifp
->flags
& IFA_F_NOPREFIXROUTE
))
1046 action
= check_cleanup_prefix_route(ifp
, &expires
);
1048 list_del_init(&ifp
->if_list
);
1051 write_unlock_bh(&ifp
->idev
->lock
);
1053 addrconf_del_dad_work(ifp
);
1055 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
1057 inet6addr_notifier_call_chain(NETDEV_DOWN
, ifp
);
1059 if (action
!= CLEANUP_PREFIX_RT_NOP
) {
1060 cleanup_prefix_route(ifp
, expires
,
1061 action
== CLEANUP_PREFIX_RT_DEL
);
1064 /* clean up prefsrc entries */
1065 rt6_remove_prefsrc(ifp
);
1070 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
1072 struct inet6_dev
*idev
= ifp
->idev
;
1073 struct in6_addr addr
, *tmpaddr
;
1074 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_tstamp
, age
;
1075 unsigned long regen_advance
;
1079 unsigned long now
= jiffies
;
1081 write_lock_bh(&idev
->lock
);
1083 spin_lock_bh(&ift
->lock
);
1084 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
1085 spin_unlock_bh(&ift
->lock
);
1092 if (idev
->cnf
.use_tempaddr
<= 0) {
1093 write_unlock_bh(&idev
->lock
);
1094 pr_info("%s: use_tempaddr is disabled\n", __func__
);
1099 spin_lock_bh(&ifp
->lock
);
1100 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
1101 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
1102 spin_unlock_bh(&ifp
->lock
);
1103 write_unlock_bh(&idev
->lock
);
1104 pr_warn("%s: regeneration time exceeded - disabled temporary address support\n",
1111 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
1112 __ipv6_try_regen_rndid(idev
, tmpaddr
);
1113 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
1114 age
= (now
- ifp
->tstamp
) / HZ
;
1115 tmp_valid_lft
= min_t(__u32
,
1117 idev
->cnf
.temp_valid_lft
+ age
);
1118 tmp_prefered_lft
= min_t(__u32
,
1120 idev
->cnf
.temp_prefered_lft
+ age
-
1121 idev
->cnf
.max_desync_factor
);
1122 tmp_plen
= ifp
->prefix_len
;
1123 tmp_tstamp
= ifp
->tstamp
;
1124 spin_unlock_bh(&ifp
->lock
);
1126 regen_advance
= idev
->cnf
.regen_max_retry
*
1127 idev
->cnf
.dad_transmits
*
1128 NEIGH_VAR(idev
->nd_parms
, RETRANS_TIME
) / HZ
;
1129 write_unlock_bh(&idev
->lock
);
1131 /* A temporary address is created only if this calculated Preferred
1132 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
1133 * an implementation must not create a temporary address with a zero
1134 * Preferred Lifetime.
1135 * Use age calculation as in addrconf_verify to avoid unnecessary
1136 * temporary addresses being generated.
1138 age
= (now
- tmp_tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
1139 if (tmp_prefered_lft
<= regen_advance
+ age
) {
1146 addr_flags
= IFA_F_TEMPORARY
;
1147 /* set in addrconf_prefix_rcv() */
1148 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
1149 addr_flags
|= IFA_F_OPTIMISTIC
;
1151 ift
= ipv6_add_addr(idev
, &addr
, NULL
, tmp_plen
,
1152 ipv6_addr_scope(&addr
), addr_flags
,
1153 tmp_valid_lft
, tmp_prefered_lft
);
1157 pr_info("%s: retry temporary address regeneration\n", __func__
);
1159 write_lock_bh(&idev
->lock
);
1163 spin_lock_bh(&ift
->lock
);
1166 ift
->tstamp
= tmp_tstamp
;
1167 spin_unlock_bh(&ift
->lock
);
1169 addrconf_dad_start(ift
);
1177 * Choose an appropriate source address (RFC3484)
1180 IPV6_SADDR_RULE_INIT
= 0,
1181 IPV6_SADDR_RULE_LOCAL
,
1182 IPV6_SADDR_RULE_SCOPE
,
1183 IPV6_SADDR_RULE_PREFERRED
,
1184 #ifdef CONFIG_IPV6_MIP6
1185 IPV6_SADDR_RULE_HOA
,
1187 IPV6_SADDR_RULE_OIF
,
1188 IPV6_SADDR_RULE_LABEL
,
1189 IPV6_SADDR_RULE_PRIVACY
,
1190 IPV6_SADDR_RULE_ORCHID
,
1191 IPV6_SADDR_RULE_PREFIX
,
1192 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1193 IPV6_SADDR_RULE_NOT_OPTIMISTIC
,
1198 struct ipv6_saddr_score
{
1201 struct inet6_ifaddr
*ifa
;
1202 DECLARE_BITMAP(scorebits
, IPV6_SADDR_RULE_MAX
);
1207 struct ipv6_saddr_dst
{
1208 const struct in6_addr
*addr
;
1215 static inline int ipv6_saddr_preferred(int type
)
1217 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|IPV6_ADDR_LOOPBACK
))
1222 static inline bool ipv6_use_optimistic_addr(struct inet6_dev
*idev
)
1224 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1225 return idev
&& idev
->cnf
.optimistic_dad
&& idev
->cnf
.use_optimistic
;
1231 static int ipv6_get_saddr_eval(struct net
*net
,
1232 struct ipv6_saddr_score
*score
,
1233 struct ipv6_saddr_dst
*dst
,
1238 if (i
<= score
->rule
) {
1240 case IPV6_SADDR_RULE_SCOPE
:
1241 ret
= score
->scopedist
;
1243 case IPV6_SADDR_RULE_PREFIX
:
1244 ret
= score
->matchlen
;
1247 ret
= !!test_bit(i
, score
->scorebits
);
1253 case IPV6_SADDR_RULE_INIT
:
1254 /* Rule 0: remember if hiscore is not ready yet */
1257 case IPV6_SADDR_RULE_LOCAL
:
1258 /* Rule 1: Prefer same address */
1259 ret
= ipv6_addr_equal(&score
->ifa
->addr
, dst
->addr
);
1261 case IPV6_SADDR_RULE_SCOPE
:
1262 /* Rule 2: Prefer appropriate scope
1267 * ---+--+-+---> scope
1269 * | d is scope of the destination.
1271 * | \ <- smaller scope is better if
1272 * B-15 | \ if scope is enough for destination.
1273 * | ret = B - scope (-1 <= scope >= d <= 15).
1275 * |/ <- greater is better
1276 * -C / if scope is not enough for destination.
1277 * /| ret = scope - C (-1 <= d < scope <= 15).
1279 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1280 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1281 * Assume B = 0 and we get C > 29.
1283 ret
= __ipv6_addr_src_scope(score
->addr_type
);
1284 if (ret
>= dst
->scope
)
1287 ret
-= 128; /* 30 is enough */
1288 score
->scopedist
= ret
;
1290 case IPV6_SADDR_RULE_PREFERRED
:
1292 /* Rule 3: Avoid deprecated and optimistic addresses */
1293 u8 avoid
= IFA_F_DEPRECATED
;
1295 if (!ipv6_use_optimistic_addr(score
->ifa
->idev
))
1296 avoid
|= IFA_F_OPTIMISTIC
;
1297 ret
= ipv6_saddr_preferred(score
->addr_type
) ||
1298 !(score
->ifa
->flags
& avoid
);
1301 #ifdef CONFIG_IPV6_MIP6
1302 case IPV6_SADDR_RULE_HOA
:
1304 /* Rule 4: Prefer home address */
1305 int prefhome
= !(dst
->prefs
& IPV6_PREFER_SRC_COA
);
1306 ret
= !(score
->ifa
->flags
& IFA_F_HOMEADDRESS
) ^ prefhome
;
1310 case IPV6_SADDR_RULE_OIF
:
1311 /* Rule 5: Prefer outgoing interface */
1312 ret
= (!dst
->ifindex
||
1313 dst
->ifindex
== score
->ifa
->idev
->dev
->ifindex
);
1315 case IPV6_SADDR_RULE_LABEL
:
1316 /* Rule 6: Prefer matching label */
1317 ret
= ipv6_addr_label(net
,
1318 &score
->ifa
->addr
, score
->addr_type
,
1319 score
->ifa
->idev
->dev
->ifindex
) == dst
->label
;
1321 case IPV6_SADDR_RULE_PRIVACY
:
1323 /* Rule 7: Prefer public address
1324 * Note: prefer temporary address if use_tempaddr >= 2
1326 int preftmp
= dst
->prefs
& (IPV6_PREFER_SRC_PUBLIC
|IPV6_PREFER_SRC_TMP
) ?
1327 !!(dst
->prefs
& IPV6_PREFER_SRC_TMP
) :
1328 score
->ifa
->idev
->cnf
.use_tempaddr
>= 2;
1329 ret
= (!(score
->ifa
->flags
& IFA_F_TEMPORARY
)) ^ preftmp
;
1332 case IPV6_SADDR_RULE_ORCHID
:
1333 /* Rule 8-: Prefer ORCHID vs ORCHID or
1334 * non-ORCHID vs non-ORCHID
1336 ret
= !(ipv6_addr_orchid(&score
->ifa
->addr
) ^
1337 ipv6_addr_orchid(dst
->addr
));
1339 case IPV6_SADDR_RULE_PREFIX
:
1340 /* Rule 8: Use longest matching prefix */
1341 ret
= ipv6_addr_diff(&score
->ifa
->addr
, dst
->addr
);
1342 if (ret
> score
->ifa
->prefix_len
)
1343 ret
= score
->ifa
->prefix_len
;
1344 score
->matchlen
= ret
;
1346 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1347 case IPV6_SADDR_RULE_NOT_OPTIMISTIC
:
1348 /* Optimistic addresses still have lower precedence than other
1349 * preferred addresses.
1351 ret
= !(score
->ifa
->flags
& IFA_F_OPTIMISTIC
);
1359 __set_bit(i
, score
->scorebits
);
1365 static int __ipv6_dev_get_saddr(struct net
*net
,
1366 struct ipv6_saddr_dst
*dst
,
1367 struct inet6_dev
*idev
,
1368 struct ipv6_saddr_score
*scores
,
1371 struct ipv6_saddr_score
*score
= &scores
[1 - hiscore_idx
], *hiscore
= &scores
[hiscore_idx
];
1373 read_lock_bh(&idev
->lock
);
1374 list_for_each_entry(score
->ifa
, &idev
->addr_list
, if_list
) {
1378 * - Tentative Address (RFC2462 section 5.4)
1379 * - A tentative address is not considered
1380 * "assigned to an interface" in the traditional
1381 * sense, unless it is also flagged as optimistic.
1382 * - Candidate Source Address (section 4)
1383 * - In any case, anycast addresses, multicast
1384 * addresses, and the unspecified address MUST
1385 * NOT be included in a candidate set.
1387 if ((score
->ifa
->flags
& IFA_F_TENTATIVE
) &&
1388 (!(score
->ifa
->flags
& IFA_F_OPTIMISTIC
)))
1391 score
->addr_type
= __ipv6_addr_type(&score
->ifa
->addr
);
1393 if (unlikely(score
->addr_type
== IPV6_ADDR_ANY
||
1394 score
->addr_type
& IPV6_ADDR_MULTICAST
)) {
1395 net_dbg_ratelimited("ADDRCONF: unspecified / multicast address assigned as unicast address on %s",
1401 bitmap_zero(score
->scorebits
, IPV6_SADDR_RULE_MAX
);
1403 for (i
= 0; i
< IPV6_SADDR_RULE_MAX
; i
++) {
1404 int minihiscore
, miniscore
;
1406 minihiscore
= ipv6_get_saddr_eval(net
, hiscore
, dst
, i
);
1407 miniscore
= ipv6_get_saddr_eval(net
, score
, dst
, i
);
1409 if (minihiscore
> miniscore
) {
1410 if (i
== IPV6_SADDR_RULE_SCOPE
&&
1411 score
->scopedist
> 0) {
1414 * each remaining entry
1415 * has too small (not enough)
1416 * scope, because ifa entries
1417 * are sorted by their scope
1423 } else if (minihiscore
< miniscore
) {
1425 in6_ifa_put(hiscore
->ifa
);
1427 in6_ifa_hold(score
->ifa
);
1429 swap(hiscore
, score
);
1430 hiscore_idx
= 1 - hiscore_idx
;
1432 /* restore our iterator */
1433 score
->ifa
= hiscore
->ifa
;
1440 read_unlock_bh(&idev
->lock
);
1444 int ipv6_dev_get_saddr(struct net
*net
, const struct net_device
*dst_dev
,
1445 const struct in6_addr
*daddr
, unsigned int prefs
,
1446 struct in6_addr
*saddr
)
1448 struct ipv6_saddr_score scores
[2], *hiscore
;
1449 struct ipv6_saddr_dst dst
;
1450 struct inet6_dev
*idev
;
1451 struct net_device
*dev
;
1453 bool use_oif_addr
= false;
1454 int hiscore_idx
= 0;
1456 dst_type
= __ipv6_addr_type(daddr
);
1458 dst
.ifindex
= dst_dev
? dst_dev
->ifindex
: 0;
1459 dst
.scope
= __ipv6_addr_src_scope(dst_type
);
1460 dst
.label
= ipv6_addr_label(net
, daddr
, dst_type
, dst
.ifindex
);
1463 scores
[hiscore_idx
].rule
= -1;
1464 scores
[hiscore_idx
].ifa
= NULL
;
1468 /* Candidate Source Address (section 4)
1469 * - multicast and link-local destination address,
1470 * the set of candidate source address MUST only
1471 * include addresses assigned to interfaces
1472 * belonging to the same link as the outgoing
1474 * (- For site-local destination addresses, the
1475 * set of candidate source addresses MUST only
1476 * include addresses assigned to interfaces
1477 * belonging to the same site as the outgoing
1479 * - "It is RECOMMENDED that the candidate source addresses
1480 * be the set of unicast addresses assigned to the
1481 * interface that will be used to send to the destination
1482 * (the 'outgoing' interface)." (RFC 6724)
1485 idev
= __in6_dev_get(dst_dev
);
1486 if ((dst_type
& IPV6_ADDR_MULTICAST
) ||
1487 dst
.scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
||
1488 (idev
&& idev
->cnf
.use_oif_addrs_only
)) {
1489 use_oif_addr
= true;
1495 hiscore_idx
= __ipv6_dev_get_saddr(net
, &dst
, idev
, scores
, hiscore_idx
);
1497 for_each_netdev_rcu(net
, dev
) {
1498 idev
= __in6_dev_get(dev
);
1501 hiscore_idx
= __ipv6_dev_get_saddr(net
, &dst
, idev
, scores
, hiscore_idx
);
1506 hiscore
= &scores
[hiscore_idx
];
1508 return -EADDRNOTAVAIL
;
1510 *saddr
= hiscore
->ifa
->addr
;
1511 in6_ifa_put(hiscore
->ifa
);
1514 EXPORT_SYMBOL(ipv6_dev_get_saddr
);
1516 int __ipv6_get_lladdr(struct inet6_dev
*idev
, struct in6_addr
*addr
,
1519 struct inet6_ifaddr
*ifp
;
1520 int err
= -EADDRNOTAVAIL
;
1522 list_for_each_entry_reverse(ifp
, &idev
->addr_list
, if_list
) {
1523 if (ifp
->scope
> IFA_LINK
)
1525 if (ifp
->scope
== IFA_LINK
&&
1526 !(ifp
->flags
& banned_flags
)) {
1535 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1538 struct inet6_dev
*idev
;
1539 int err
= -EADDRNOTAVAIL
;
1542 idev
= __in6_dev_get(dev
);
1544 read_lock_bh(&idev
->lock
);
1545 err
= __ipv6_get_lladdr(idev
, addr
, banned_flags
);
1546 read_unlock_bh(&idev
->lock
);
1552 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1555 struct inet6_ifaddr
*ifp
;
1557 read_lock_bh(&idev
->lock
);
1558 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
)
1560 read_unlock_bh(&idev
->lock
);
1564 int ipv6_chk_addr(struct net
*net
, const struct in6_addr
*addr
,
1565 const struct net_device
*dev
, int strict
)
1567 return ipv6_chk_addr_and_flags(net
, addr
, dev
, strict
, IFA_F_TENTATIVE
);
1569 EXPORT_SYMBOL(ipv6_chk_addr
);
1571 int ipv6_chk_addr_and_flags(struct net
*net
, const struct in6_addr
*addr
,
1572 const struct net_device
*dev
, int strict
,
1575 struct inet6_ifaddr
*ifp
;
1576 unsigned int hash
= inet6_addr_hash(addr
);
1580 hlist_for_each_entry_rcu(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1581 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1583 /* Decouple optimistic from tentative for evaluation here.
1584 * Ban optimistic addresses explicitly, when required.
1586 ifp_flags
= (ifp
->flags
&IFA_F_OPTIMISTIC
)
1587 ? (ifp
->flags
&~IFA_F_TENTATIVE
)
1589 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1590 !(ifp_flags
&banned_flags
) &&
1591 (!dev
|| ifp
->idev
->dev
== dev
||
1592 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))) {
1593 rcu_read_unlock_bh();
1598 rcu_read_unlock_bh();
1601 EXPORT_SYMBOL(ipv6_chk_addr_and_flags
);
1603 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
1604 struct net_device
*dev
)
1606 unsigned int hash
= inet6_addr_hash(addr
);
1607 struct inet6_ifaddr
*ifp
;
1609 hlist_for_each_entry(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1610 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1612 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1613 if (!dev
|| ifp
->idev
->dev
== dev
)
1620 /* Compares an address/prefix_len with addresses on device @dev.
1621 * If one is found it returns true.
1623 bool ipv6_chk_custom_prefix(const struct in6_addr
*addr
,
1624 const unsigned int prefix_len
, struct net_device
*dev
)
1626 struct inet6_dev
*idev
;
1627 struct inet6_ifaddr
*ifa
;
1631 idev
= __in6_dev_get(dev
);
1633 read_lock_bh(&idev
->lock
);
1634 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
1635 ret
= ipv6_prefix_equal(addr
, &ifa
->addr
, prefix_len
);
1639 read_unlock_bh(&idev
->lock
);
1645 EXPORT_SYMBOL(ipv6_chk_custom_prefix
);
1647 int ipv6_chk_prefix(const struct in6_addr
*addr
, struct net_device
*dev
)
1649 struct inet6_dev
*idev
;
1650 struct inet6_ifaddr
*ifa
;
1655 idev
= __in6_dev_get(dev
);
1657 read_lock_bh(&idev
->lock
);
1658 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
1659 onlink
= ipv6_prefix_equal(addr
, &ifa
->addr
,
1664 read_unlock_bh(&idev
->lock
);
1669 EXPORT_SYMBOL(ipv6_chk_prefix
);
1671 struct inet6_ifaddr
*ipv6_get_ifaddr(struct net
*net
, const struct in6_addr
*addr
,
1672 struct net_device
*dev
, int strict
)
1674 struct inet6_ifaddr
*ifp
, *result
= NULL
;
1675 unsigned int hash
= inet6_addr_hash(addr
);
1678 hlist_for_each_entry_rcu_bh(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1679 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1681 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1682 if (!dev
|| ifp
->idev
->dev
== dev
||
1683 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1690 rcu_read_unlock_bh();
1695 /* Gets referenced address, destroys ifaddr */
1697 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
, int dad_failed
)
1699 if (ifp
->flags
&IFA_F_PERMANENT
) {
1700 spin_lock_bh(&ifp
->lock
);
1701 addrconf_del_dad_work(ifp
);
1702 ifp
->flags
|= IFA_F_TENTATIVE
;
1704 ifp
->flags
|= IFA_F_DADFAILED
;
1705 spin_unlock_bh(&ifp
->lock
);
1707 ipv6_ifa_notify(0, ifp
);
1709 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1710 struct inet6_ifaddr
*ifpub
;
1711 spin_lock_bh(&ifp
->lock
);
1714 in6_ifa_hold(ifpub
);
1715 spin_unlock_bh(&ifp
->lock
);
1716 ipv6_create_tempaddr(ifpub
, ifp
);
1719 spin_unlock_bh(&ifp
->lock
);
1727 static int addrconf_dad_end(struct inet6_ifaddr
*ifp
)
1731 spin_lock_bh(&ifp
->lock
);
1732 if (ifp
->state
== INET6_IFADDR_STATE_DAD
) {
1733 ifp
->state
= INET6_IFADDR_STATE_POSTDAD
;
1736 spin_unlock_bh(&ifp
->lock
);
1741 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1743 struct in6_addr addr
;
1744 struct inet6_dev
*idev
= ifp
->idev
;
1745 struct net
*net
= dev_net(ifp
->idev
->dev
);
1747 if (addrconf_dad_end(ifp
)) {
1752 net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n",
1753 ifp
->idev
->dev
->name
, &ifp
->addr
);
1755 spin_lock_bh(&ifp
->lock
);
1757 if (ifp
->flags
& IFA_F_STABLE_PRIVACY
) {
1758 int scope
= ifp
->scope
;
1759 u32 flags
= ifp
->flags
;
1760 struct in6_addr new_addr
;
1761 struct inet6_ifaddr
*ifp2
;
1762 u32 valid_lft
, preferred_lft
;
1763 int pfxlen
= ifp
->prefix_len
;
1764 int retries
= ifp
->stable_privacy_retry
+ 1;
1766 if (retries
> net
->ipv6
.sysctl
.idgen_retries
) {
1767 net_info_ratelimited("%s: privacy stable address generation failed because of DAD conflicts!\n",
1768 ifp
->idev
->dev
->name
);
1772 new_addr
= ifp
->addr
;
1773 if (ipv6_generate_stable_address(&new_addr
, retries
,
1777 valid_lft
= ifp
->valid_lft
;
1778 preferred_lft
= ifp
->prefered_lft
;
1780 spin_unlock_bh(&ifp
->lock
);
1782 if (idev
->cnf
.max_addresses
&&
1783 ipv6_count_addresses(idev
) >=
1784 idev
->cnf
.max_addresses
)
1787 net_info_ratelimited("%s: generating new stable privacy address because of DAD conflict\n",
1788 ifp
->idev
->dev
->name
);
1790 ifp2
= ipv6_add_addr(idev
, &new_addr
, NULL
, pfxlen
,
1791 scope
, flags
, valid_lft
,
1796 spin_lock_bh(&ifp2
->lock
);
1797 ifp2
->stable_privacy_retry
= retries
;
1798 ifp2
->state
= INET6_IFADDR_STATE_PREDAD
;
1799 spin_unlock_bh(&ifp2
->lock
);
1801 addrconf_mod_dad_work(ifp2
, net
->ipv6
.sysctl
.idgen_delay
);
1804 spin_lock_bh(&ifp
->lock
);
1805 } else if (idev
->cnf
.accept_dad
> 1 && !idev
->cnf
.disable_ipv6
) {
1806 addr
.s6_addr32
[0] = htonl(0xfe800000);
1807 addr
.s6_addr32
[1] = 0;
1809 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) &&
1810 ipv6_addr_equal(&ifp
->addr
, &addr
)) {
1811 /* DAD failed for link-local based on MAC address */
1812 idev
->cnf
.disable_ipv6
= 1;
1814 pr_info("%s: IPv6 being disabled!\n",
1815 ifp
->idev
->dev
->name
);
1820 /* transition from _POSTDAD to _ERRDAD */
1821 ifp
->state
= INET6_IFADDR_STATE_ERRDAD
;
1822 spin_unlock_bh(&ifp
->lock
);
1824 addrconf_mod_dad_work(ifp
, 0);
1827 /* Join to solicited addr multicast group.
1828 * caller must hold RTNL */
1829 void addrconf_join_solict(struct net_device
*dev
, const struct in6_addr
*addr
)
1831 struct in6_addr maddr
;
1833 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1836 addrconf_addr_solict_mult(addr
, &maddr
);
1837 ipv6_dev_mc_inc(dev
, &maddr
);
1840 /* caller must hold RTNL */
1841 void addrconf_leave_solict(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
1843 struct in6_addr maddr
;
1845 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1848 addrconf_addr_solict_mult(addr
, &maddr
);
1849 __ipv6_dev_mc_dec(idev
, &maddr
);
1852 /* caller must hold RTNL */
1853 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1855 struct in6_addr addr
;
1857 if (ifp
->prefix_len
>= 127) /* RFC 6164 */
1859 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1860 if (ipv6_addr_any(&addr
))
1862 __ipv6_dev_ac_inc(ifp
->idev
, &addr
);
1865 /* caller must hold RTNL */
1866 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1868 struct in6_addr addr
;
1870 if (ifp
->prefix_len
>= 127) /* RFC 6164 */
1872 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1873 if (ipv6_addr_any(&addr
))
1875 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1878 static int addrconf_ifid_eui48(u8
*eui
, struct net_device
*dev
)
1880 if (dev
->addr_len
!= ETH_ALEN
)
1882 memcpy(eui
, dev
->dev_addr
, 3);
1883 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1886 * The zSeries OSA network cards can be shared among various
1887 * OS instances, but the OSA cards have only one MAC address.
1888 * This leads to duplicate address conflicts in conjunction
1889 * with IPv6 if more than one instance uses the same card.
1891 * The driver for these cards can deliver a unique 16-bit
1892 * identifier for each instance sharing the same card. It is
1893 * placed instead of 0xFFFE in the interface identifier. The
1894 * "u" bit of the interface identifier is not inverted in this
1895 * case. Hence the resulting interface identifier has local
1896 * scope according to RFC2373.
1899 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1900 eui
[4] = dev
->dev_id
& 0xFF;
1909 static int addrconf_ifid_eui64(u8
*eui
, struct net_device
*dev
)
1911 if (dev
->addr_len
!= IEEE802154_ADDR_LEN
)
1913 memcpy(eui
, dev
->dev_addr
, 8);
1918 static int addrconf_ifid_ieee1394(u8
*eui
, struct net_device
*dev
)
1920 union fwnet_hwaddr
*ha
;
1922 if (dev
->addr_len
!= FWNET_ALEN
)
1925 ha
= (union fwnet_hwaddr
*)dev
->dev_addr
;
1927 memcpy(eui
, &ha
->uc
.uniq_id
, sizeof(ha
->uc
.uniq_id
));
1932 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1934 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1935 if (dev
->addr_len
!= ARCNET_ALEN
)
1938 eui
[7] = *(u8
*)dev
->dev_addr
;
1942 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1944 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1946 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1951 static int __ipv6_isatap_ifid(u8
*eui
, __be32 addr
)
1955 eui
[0] = (ipv4_is_zeronet(addr
) || ipv4_is_private_10(addr
) ||
1956 ipv4_is_loopback(addr
) || ipv4_is_linklocal_169(addr
) ||
1957 ipv4_is_private_172(addr
) || ipv4_is_test_192(addr
) ||
1958 ipv4_is_anycast_6to4(addr
) || ipv4_is_private_192(addr
) ||
1959 ipv4_is_test_198(addr
) || ipv4_is_multicast(addr
) ||
1960 ipv4_is_lbcast(addr
)) ? 0x00 : 0x02;
1964 memcpy(eui
+ 4, &addr
, 4);
1968 static int addrconf_ifid_sit(u8
*eui
, struct net_device
*dev
)
1970 if (dev
->priv_flags
& IFF_ISATAP
)
1971 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
1975 static int addrconf_ifid_gre(u8
*eui
, struct net_device
*dev
)
1977 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
1980 static int addrconf_ifid_ip6tnl(u8
*eui
, struct net_device
*dev
)
1982 memcpy(eui
, dev
->perm_addr
, 3);
1983 memcpy(eui
+ 5, dev
->perm_addr
+ 3, 3);
1990 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1992 switch (dev
->type
) {
1995 return addrconf_ifid_eui48(eui
, dev
);
1997 return addrconf_ifid_arcnet(eui
, dev
);
1998 case ARPHRD_INFINIBAND
:
1999 return addrconf_ifid_infiniband(eui
, dev
);
2001 return addrconf_ifid_sit(eui
, dev
);
2003 return addrconf_ifid_gre(eui
, dev
);
2004 case ARPHRD_6LOWPAN
:
2005 case ARPHRD_IEEE802154
:
2006 return addrconf_ifid_eui64(eui
, dev
);
2007 case ARPHRD_IEEE1394
:
2008 return addrconf_ifid_ieee1394(eui
, dev
);
2009 case ARPHRD_TUNNEL6
:
2010 return addrconf_ifid_ip6tnl(eui
, dev
);
2015 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
2018 struct inet6_ifaddr
*ifp
;
2020 read_lock_bh(&idev
->lock
);
2021 list_for_each_entry_reverse(ifp
, &idev
->addr_list
, if_list
) {
2022 if (ifp
->scope
> IFA_LINK
)
2024 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2025 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
2030 read_unlock_bh(&idev
->lock
);
2034 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
2035 static void __ipv6_regen_rndid(struct inet6_dev
*idev
)
2038 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
2039 idev
->rndid
[0] &= ~0x02;
2042 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
2043 * check if generated address is not inappropriate
2045 * - Reserved subnet anycast (RFC 2526)
2046 * 11111101 11....11 1xxxxxxx
2047 * - ISATAP (RFC4214) 6.1
2048 * 00-00-5E-FE-xx-xx-xx-xx
2050 * - XXX: already assigned to an address on the device
2052 if (idev
->rndid
[0] == 0xfd &&
2053 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
2054 (idev
->rndid
[7]&0x80))
2056 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
2057 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
2059 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
2064 static void ipv6_regen_rndid(unsigned long data
)
2066 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
2067 unsigned long expires
;
2070 write_lock_bh(&idev
->lock
);
2075 __ipv6_regen_rndid(idev
);
2078 idev
->cnf
.temp_prefered_lft
* HZ
-
2079 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
*
2080 NEIGH_VAR(idev
->nd_parms
, RETRANS_TIME
) -
2081 idev
->cnf
.max_desync_factor
* HZ
;
2082 if (time_before(expires
, jiffies
)) {
2083 pr_warn("%s: too short regeneration interval; timer disabled for %s\n",
2084 __func__
, idev
->dev
->name
);
2088 if (!mod_timer(&idev
->regen_timer
, expires
))
2092 write_unlock_bh(&idev
->lock
);
2093 rcu_read_unlock_bh();
2097 static void __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
)
2099 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
2100 __ipv6_regen_rndid(idev
);
2108 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
2109 unsigned long expires
, u32 flags
)
2111 struct fib6_config cfg
= {
2112 .fc_table
= RT6_TABLE_PREFIX
,
2113 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
2114 .fc_ifindex
= dev
->ifindex
,
2115 .fc_expires
= expires
,
2117 .fc_flags
= RTF_UP
| flags
,
2118 .fc_nlinfo
.nl_net
= dev_net(dev
),
2119 .fc_protocol
= RTPROT_KERNEL
,
2124 /* Prevent useless cloning on PtP SIT.
2125 This thing is done here expecting that the whole
2126 class of non-broadcast devices need not cloning.
2128 #if IS_ENABLED(CONFIG_IPV6_SIT)
2129 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
2130 cfg
.fc_flags
|= RTF_NONEXTHOP
;
2133 ip6_route_add(&cfg
);
2137 static struct rt6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
2139 const struct net_device
*dev
,
2140 u32 flags
, u32 noflags
)
2142 struct fib6_node
*fn
;
2143 struct rt6_info
*rt
= NULL
;
2144 struct fib6_table
*table
;
2146 table
= fib6_get_table(dev_net(dev
), RT6_TABLE_PREFIX
);
2150 read_lock_bh(&table
->tb6_lock
);
2151 fn
= fib6_locate(&table
->tb6_root
, pfx
, plen
, NULL
, 0);
2155 noflags
|= RTF_CACHE
;
2156 for (rt
= fn
->leaf
; rt
; rt
= rt
->dst
.rt6_next
) {
2157 if (rt
->dst
.dev
->ifindex
!= dev
->ifindex
)
2159 if ((rt
->rt6i_flags
& flags
) != flags
)
2161 if ((rt
->rt6i_flags
& noflags
) != 0)
2167 read_unlock_bh(&table
->tb6_lock
);
2172 /* Create "default" multicast route to the interface */
2174 static void addrconf_add_mroute(struct net_device
*dev
)
2176 struct fib6_config cfg
= {
2177 .fc_table
= RT6_TABLE_LOCAL
,
2178 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
2179 .fc_ifindex
= dev
->ifindex
,
2182 .fc_nlinfo
.nl_net
= dev_net(dev
),
2185 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
2187 ip6_route_add(&cfg
);
2190 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
2192 struct inet6_dev
*idev
;
2196 idev
= ipv6_find_idev(dev
);
2198 return ERR_PTR(-ENOBUFS
);
2200 if (idev
->cnf
.disable_ipv6
)
2201 return ERR_PTR(-EACCES
);
2203 /* Add default multicast route */
2204 if (!(dev
->flags
& IFF_LOOPBACK
))
2205 addrconf_add_mroute(dev
);
2210 static void manage_tempaddrs(struct inet6_dev
*idev
,
2211 struct inet6_ifaddr
*ifp
,
2212 __u32 valid_lft
, __u32 prefered_lft
,
2213 bool create
, unsigned long now
)
2216 struct inet6_ifaddr
*ift
;
2218 read_lock_bh(&idev
->lock
);
2219 /* update all temporary addresses in the list */
2220 list_for_each_entry(ift
, &idev
->tempaddr_list
, tmp_list
) {
2221 int age
, max_valid
, max_prefered
;
2223 if (ifp
!= ift
->ifpub
)
2226 /* RFC 4941 section 3.3:
2227 * If a received option will extend the lifetime of a public
2228 * address, the lifetimes of temporary addresses should
2229 * be extended, subject to the overall constraint that no
2230 * temporary addresses should ever remain "valid" or "preferred"
2231 * for a time longer than (TEMP_VALID_LIFETIME) or
2232 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), respectively.
2234 age
= (now
- ift
->cstamp
) / HZ
;
2235 max_valid
= idev
->cnf
.temp_valid_lft
- age
;
2239 max_prefered
= idev
->cnf
.temp_prefered_lft
-
2240 idev
->cnf
.max_desync_factor
- age
;
2241 if (max_prefered
< 0)
2244 if (valid_lft
> max_valid
)
2245 valid_lft
= max_valid
;
2247 if (prefered_lft
> max_prefered
)
2248 prefered_lft
= max_prefered
;
2250 spin_lock(&ift
->lock
);
2252 ift
->valid_lft
= valid_lft
;
2253 ift
->prefered_lft
= prefered_lft
;
2255 if (prefered_lft
> 0)
2256 ift
->flags
&= ~IFA_F_DEPRECATED
;
2258 spin_unlock(&ift
->lock
);
2259 if (!(flags
&IFA_F_TENTATIVE
))
2260 ipv6_ifa_notify(0, ift
);
2263 if ((create
|| list_empty(&idev
->tempaddr_list
)) &&
2264 idev
->cnf
.use_tempaddr
> 0) {
2265 /* When a new public address is created as described
2266 * in [ADDRCONF], also create a new temporary address.
2267 * Also create a temporary address if it's enabled but
2268 * no temporary address currently exists.
2270 read_unlock_bh(&idev
->lock
);
2271 ipv6_create_tempaddr(ifp
, NULL
);
2273 read_unlock_bh(&idev
->lock
);
2277 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
, bool sllao
)
2279 struct prefix_info
*pinfo
;
2284 struct inet6_dev
*in6_dev
;
2285 struct net
*net
= dev_net(dev
);
2287 pinfo
= (struct prefix_info
*) opt
;
2289 if (len
< sizeof(struct prefix_info
)) {
2290 ADBG("addrconf: prefix option too short\n");
2295 * Validation checks ([ADDRCONF], page 19)
2298 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
2300 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
2303 valid_lft
= ntohl(pinfo
->valid
);
2304 prefered_lft
= ntohl(pinfo
->prefered
);
2306 if (prefered_lft
> valid_lft
) {
2307 net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n");
2311 in6_dev
= in6_dev_get(dev
);
2314 net_dbg_ratelimited("addrconf: device %s not configured\n",
2320 * Two things going on here:
2321 * 1) Add routes for on-link prefixes
2322 * 2) Configure prefixes with the auto flag set
2325 if (pinfo
->onlink
) {
2326 struct rt6_info
*rt
;
2327 unsigned long rt_expires
;
2329 /* Avoid arithmetic overflow. Really, we could
2330 * save rt_expires in seconds, likely valid_lft,
2331 * but it would require division in fib gc, that it
2335 rt_expires
= addrconf_timeout_fixup(valid_lft
, HZ
);
2337 rt_expires
= addrconf_timeout_fixup(valid_lft
, USER_HZ
);
2339 if (addrconf_finite_timeout(rt_expires
))
2342 rt
= addrconf_get_prefix_route(&pinfo
->prefix
,
2345 RTF_ADDRCONF
| RTF_PREFIX_RT
,
2346 RTF_GATEWAY
| RTF_DEFAULT
);
2349 /* Autoconf prefix route */
2350 if (valid_lft
== 0) {
2353 } else if (addrconf_finite_timeout(rt_expires
)) {
2355 rt6_set_expires(rt
, jiffies
+ rt_expires
);
2357 rt6_clean_expires(rt
);
2359 } else if (valid_lft
) {
2360 clock_t expires
= 0;
2361 int flags
= RTF_ADDRCONF
| RTF_PREFIX_RT
;
2362 if (addrconf_finite_timeout(rt_expires
)) {
2364 flags
|= RTF_EXPIRES
;
2365 expires
= jiffies_to_clock_t(rt_expires
);
2367 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
2368 dev
, expires
, flags
);
2373 /* Try to figure out our local address for this prefix */
2375 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
2376 struct inet6_ifaddr
*ifp
;
2377 struct in6_addr addr
;
2378 int create
= 0, update_lft
= 0;
2379 bool tokenized
= false;
2381 if (pinfo
->prefix_len
== 64) {
2382 memcpy(&addr
, &pinfo
->prefix
, 8);
2384 if (!ipv6_addr_any(&in6_dev
->token
)) {
2385 read_lock_bh(&in6_dev
->lock
);
2386 memcpy(addr
.s6_addr
+ 8,
2387 in6_dev
->token
.s6_addr
+ 8, 8);
2388 read_unlock_bh(&in6_dev
->lock
);
2390 } else if (in6_dev
->addr_gen_mode
==
2391 IN6_ADDR_GEN_MODE_STABLE_PRIVACY
&&
2392 !ipv6_generate_stable_address(&addr
, 0,
2394 addr_flags
|= IFA_F_STABLE_PRIVACY
;
2396 } else if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
2397 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
2398 in6_dev_put(in6_dev
);
2403 net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n",
2405 in6_dev_put(in6_dev
);
2410 ifp
= ipv6_get_ifaddr(net
, &addr
, dev
, 1);
2412 if (!ifp
&& valid_lft
) {
2413 int max_addresses
= in6_dev
->cnf
.max_addresses
;
2415 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2416 if (in6_dev
->cnf
.optimistic_dad
&&
2417 !net
->ipv6
.devconf_all
->forwarding
&& sllao
)
2418 addr_flags
= IFA_F_OPTIMISTIC
;
2421 /* Do not allow to create too much of autoconfigured
2422 * addresses; this would be too easy way to crash kernel.
2424 if (!max_addresses
||
2425 ipv6_count_addresses(in6_dev
) < max_addresses
)
2426 ifp
= ipv6_add_addr(in6_dev
, &addr
, NULL
,
2428 addr_type
&IPV6_ADDR_SCOPE_MASK
,
2429 addr_flags
, valid_lft
,
2432 if (IS_ERR_OR_NULL(ifp
)) {
2433 in6_dev_put(in6_dev
);
2439 spin_lock_bh(&ifp
->lock
);
2440 ifp
->flags
|= IFA_F_MANAGETEMPADDR
;
2441 ifp
->cstamp
= jiffies
;
2442 ifp
->tokenized
= tokenized
;
2443 spin_unlock_bh(&ifp
->lock
);
2444 addrconf_dad_start(ifp
);
2452 /* update lifetime (RFC2462 5.5.3 e) */
2453 spin_lock_bh(&ifp
->lock
);
2455 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
2456 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
2459 if (!update_lft
&& !create
&& stored_lft
) {
2460 const u32 minimum_lft
= min_t(u32
,
2461 stored_lft
, MIN_VALID_LIFETIME
);
2462 valid_lft
= max(valid_lft
, minimum_lft
);
2464 /* RFC4862 Section 5.5.3e:
2465 * "Note that the preferred lifetime of the
2466 * corresponding address is always reset to
2467 * the Preferred Lifetime in the received
2468 * Prefix Information option, regardless of
2469 * whether the valid lifetime is also reset or
2472 * So we should always update prefered_lft here.
2478 ifp
->valid_lft
= valid_lft
;
2479 ifp
->prefered_lft
= prefered_lft
;
2482 ifp
->flags
&= ~IFA_F_DEPRECATED
;
2483 spin_unlock_bh(&ifp
->lock
);
2485 if (!(flags
&IFA_F_TENTATIVE
))
2486 ipv6_ifa_notify(0, ifp
);
2488 spin_unlock_bh(&ifp
->lock
);
2490 manage_tempaddrs(in6_dev
, ifp
, valid_lft
, prefered_lft
,
2497 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
2498 in6_dev_put(in6_dev
);
2502 * Set destination address.
2503 * Special case for SIT interfaces where we create a new "virtual"
2506 int addrconf_set_dstaddr(struct net
*net
, void __user
*arg
)
2508 struct in6_ifreq ireq
;
2509 struct net_device
*dev
;
2515 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2518 dev
= __dev_get_by_index(net
, ireq
.ifr6_ifindex
);
2524 #if IS_ENABLED(CONFIG_IPV6_SIT)
2525 if (dev
->type
== ARPHRD_SIT
) {
2526 const struct net_device_ops
*ops
= dev
->netdev_ops
;
2528 struct ip_tunnel_parm p
;
2530 err
= -EADDRNOTAVAIL
;
2531 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
2534 memset(&p
, 0, sizeof(p
));
2535 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
2539 p
.iph
.protocol
= IPPROTO_IPV6
;
2541 ifr
.ifr_ifru
.ifru_data
= (__force
void __user
*)&p
;
2543 if (ops
->ndo_do_ioctl
) {
2544 mm_segment_t oldfs
= get_fs();
2547 err
= ops
->ndo_do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
2554 dev
= __dev_get_by_name(net
, p
.name
);
2557 err
= dev_open(dev
);
2567 static int ipv6_mc_config(struct sock
*sk
, bool join
,
2568 const struct in6_addr
*addr
, int ifindex
)
2576 ret
= ipv6_sock_mc_join(sk
, ifindex
, addr
);
2578 ret
= ipv6_sock_mc_drop(sk
, ifindex
, addr
);
2585 * Manual configuration of address on an interface
2587 static int inet6_addr_add(struct net
*net
, int ifindex
,
2588 const struct in6_addr
*pfx
,
2589 const struct in6_addr
*peer_pfx
,
2590 unsigned int plen
, __u32 ifa_flags
,
2591 __u32 prefered_lft
, __u32 valid_lft
)
2593 struct inet6_ifaddr
*ifp
;
2594 struct inet6_dev
*idev
;
2595 struct net_device
*dev
;
2596 unsigned long timeout
;
2606 /* check the lifetime */
2607 if (!valid_lft
|| prefered_lft
> valid_lft
)
2610 if (ifa_flags
& IFA_F_MANAGETEMPADDR
&& plen
!= 64)
2613 dev
= __dev_get_by_index(net
, ifindex
);
2617 idev
= addrconf_add_dev(dev
);
2619 return PTR_ERR(idev
);
2621 if (ifa_flags
& IFA_F_MCAUTOJOIN
) {
2622 int ret
= ipv6_mc_config(net
->ipv6
.mc_autojoin_sk
,
2623 true, pfx
, ifindex
);
2629 scope
= ipv6_addr_scope(pfx
);
2631 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
2632 if (addrconf_finite_timeout(timeout
)) {
2633 expires
= jiffies_to_clock_t(timeout
* HZ
);
2634 valid_lft
= timeout
;
2635 flags
= RTF_EXPIRES
;
2639 ifa_flags
|= IFA_F_PERMANENT
;
2642 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
2643 if (addrconf_finite_timeout(timeout
)) {
2645 ifa_flags
|= IFA_F_DEPRECATED
;
2646 prefered_lft
= timeout
;
2649 ifp
= ipv6_add_addr(idev
, pfx
, peer_pfx
, plen
, scope
, ifa_flags
,
2650 valid_lft
, prefered_lft
);
2653 if (!(ifa_flags
& IFA_F_NOPREFIXROUTE
)) {
2654 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
2659 * Note that section 3.1 of RFC 4429 indicates
2660 * that the Optimistic flag should not be set for
2661 * manually configured addresses
2663 addrconf_dad_start(ifp
);
2664 if (ifa_flags
& IFA_F_MANAGETEMPADDR
)
2665 manage_tempaddrs(idev
, ifp
, valid_lft
, prefered_lft
,
2668 addrconf_verify_rtnl();
2670 } else if (ifa_flags
& IFA_F_MCAUTOJOIN
) {
2671 ipv6_mc_config(net
->ipv6
.mc_autojoin_sk
,
2672 false, pfx
, ifindex
);
2675 return PTR_ERR(ifp
);
2678 static int inet6_addr_del(struct net
*net
, int ifindex
, u32 ifa_flags
,
2679 const struct in6_addr
*pfx
, unsigned int plen
)
2681 struct inet6_ifaddr
*ifp
;
2682 struct inet6_dev
*idev
;
2683 struct net_device
*dev
;
2688 dev
= __dev_get_by_index(net
, ifindex
);
2692 idev
= __in6_dev_get(dev
);
2696 read_lock_bh(&idev
->lock
);
2697 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
2698 if (ifp
->prefix_len
== plen
&&
2699 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
2701 read_unlock_bh(&idev
->lock
);
2703 if (!(ifp
->flags
& IFA_F_TEMPORARY
) &&
2704 (ifa_flags
& IFA_F_MANAGETEMPADDR
))
2705 manage_tempaddrs(idev
, ifp
, 0, 0, false,
2708 addrconf_verify_rtnl();
2709 if (ipv6_addr_is_multicast(pfx
)) {
2710 ipv6_mc_config(net
->ipv6
.mc_autojoin_sk
,
2711 false, pfx
, dev
->ifindex
);
2716 read_unlock_bh(&idev
->lock
);
2717 return -EADDRNOTAVAIL
;
2721 int addrconf_add_ifaddr(struct net
*net
, void __user
*arg
)
2723 struct in6_ifreq ireq
;
2726 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
2729 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2733 err
= inet6_addr_add(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, NULL
,
2734 ireq
.ifr6_prefixlen
, IFA_F_PERMANENT
,
2735 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2740 int addrconf_del_ifaddr(struct net
*net
, void __user
*arg
)
2742 struct in6_ifreq ireq
;
2745 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
2748 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2752 err
= inet6_addr_del(net
, ireq
.ifr6_ifindex
, 0, &ireq
.ifr6_addr
,
2753 ireq
.ifr6_prefixlen
);
2758 static void add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
2759 int plen
, int scope
)
2761 struct inet6_ifaddr
*ifp
;
2763 ifp
= ipv6_add_addr(idev
, addr
, NULL
, plen
,
2764 scope
, IFA_F_PERMANENT
,
2765 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2767 spin_lock_bh(&ifp
->lock
);
2768 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2769 spin_unlock_bh(&ifp
->lock
);
2770 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2775 #if IS_ENABLED(CONFIG_IPV6_SIT)
2776 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
2778 struct in6_addr addr
;
2779 struct net_device
*dev
;
2780 struct net
*net
= dev_net(idev
->dev
);
2786 memset(&addr
, 0, sizeof(struct in6_addr
));
2787 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
2789 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
2790 addr
.s6_addr32
[0] = htonl(0xfe800000);
2794 scope
= IPV6_ADDR_COMPATv4
;
2796 pflags
|= RTF_NONEXTHOP
;
2799 if (addr
.s6_addr32
[3]) {
2800 add_addr(idev
, &addr
, plen
, scope
);
2801 addrconf_prefix_route(&addr
, plen
, idev
->dev
, 0, pflags
);
2805 for_each_netdev(net
, dev
) {
2806 struct in_device
*in_dev
= __in_dev_get_rtnl(dev
);
2807 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
2808 struct in_ifaddr
*ifa
;
2812 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
2814 addr
.s6_addr32
[3] = ifa
->ifa_local
;
2816 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
2818 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
2819 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2824 add_addr(idev
, &addr
, plen
, flag
);
2825 addrconf_prefix_route(&addr
, plen
, idev
->dev
, 0,
2833 static void init_loopback(struct net_device
*dev
)
2835 struct inet6_dev
*idev
;
2836 struct net_device
*sp_dev
;
2837 struct inet6_ifaddr
*sp_ifa
;
2838 struct rt6_info
*sp_rt
;
2844 idev
= ipv6_find_idev(dev
);
2846 pr_debug("%s: add_dev failed\n", __func__
);
2850 add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
);
2852 /* Add routes to other interface's IPv6 addresses */
2853 for_each_netdev(dev_net(dev
), sp_dev
) {
2854 if (!strcmp(sp_dev
->name
, dev
->name
))
2857 idev
= __in6_dev_get(sp_dev
);
2861 read_lock_bh(&idev
->lock
);
2862 list_for_each_entry(sp_ifa
, &idev
->addr_list
, if_list
) {
2864 if (sp_ifa
->flags
& (IFA_F_DADFAILED
| IFA_F_TENTATIVE
))
2868 /* This dst has been added to garbage list when
2869 * lo device down, release this obsolete dst and
2870 * reallocate a new router for ifa.
2872 if (sp_ifa
->rt
->dst
.obsolete
> 0) {
2873 ip6_rt_put(sp_ifa
->rt
);
2880 sp_rt
= addrconf_dst_alloc(idev
, &sp_ifa
->addr
, false);
2882 /* Failure cases are ignored */
2883 if (!IS_ERR(sp_rt
)) {
2888 read_unlock_bh(&idev
->lock
);
2892 static void addrconf_add_linklocal(struct inet6_dev
*idev
,
2893 const struct in6_addr
*addr
, u32 flags
)
2895 struct inet6_ifaddr
*ifp
;
2896 u32 addr_flags
= flags
| IFA_F_PERMANENT
;
2898 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2899 if (idev
->cnf
.optimistic_dad
&&
2900 !dev_net(idev
->dev
)->ipv6
.devconf_all
->forwarding
)
2901 addr_flags
|= IFA_F_OPTIMISTIC
;
2904 ifp
= ipv6_add_addr(idev
, addr
, NULL
, 64, IFA_LINK
, addr_flags
,
2905 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2907 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
2908 addrconf_dad_start(ifp
);
2913 static bool ipv6_reserved_interfaceid(struct in6_addr address
)
2915 if ((address
.s6_addr32
[2] | address
.s6_addr32
[3]) == 0)
2918 if (address
.s6_addr32
[2] == htonl(0x02005eff) &&
2919 ((address
.s6_addr32
[3] & htonl(0xfe000000)) == htonl(0xfe000000)))
2922 if (address
.s6_addr32
[2] == htonl(0xfdffffff) &&
2923 ((address
.s6_addr32
[3] & htonl(0xffffff80)) == htonl(0xffffff80)))
2929 static int ipv6_generate_stable_address(struct in6_addr
*address
,
2931 const struct inet6_dev
*idev
)
2933 static DEFINE_SPINLOCK(lock
);
2934 static __u32 digest
[SHA_DIGEST_WORDS
];
2935 static __u32 workspace
[SHA_WORKSPACE_WORDS
];
2938 char __data
[SHA_MESSAGE_BYTES
];
2940 struct in6_addr secret
;
2942 unsigned char hwaddr
[MAX_ADDR_LEN
];
2947 struct in6_addr secret
;
2948 struct in6_addr temp
;
2949 struct net
*net
= dev_net(idev
->dev
);
2951 BUILD_BUG_ON(sizeof(data
.__data
) != sizeof(data
));
2953 if (idev
->cnf
.stable_secret
.initialized
)
2954 secret
= idev
->cnf
.stable_secret
.secret
;
2955 else if (net
->ipv6
.devconf_dflt
->stable_secret
.initialized
)
2956 secret
= net
->ipv6
.devconf_dflt
->stable_secret
.secret
;
2961 spin_lock_bh(&lock
);
2964 memset(&data
, 0, sizeof(data
));
2965 memset(workspace
, 0, sizeof(workspace
));
2966 memcpy(data
.hwaddr
, idev
->dev
->perm_addr
, idev
->dev
->addr_len
);
2967 data
.prefix
[0] = address
->s6_addr32
[0];
2968 data
.prefix
[1] = address
->s6_addr32
[1];
2969 data
.secret
= secret
;
2970 data
.dad_count
= dad_count
;
2972 sha_transform(digest
, data
.__data
, workspace
);
2975 temp
.s6_addr32
[2] = (__force __be32
)digest
[0];
2976 temp
.s6_addr32
[3] = (__force __be32
)digest
[1];
2978 spin_unlock_bh(&lock
);
2980 if (ipv6_reserved_interfaceid(temp
)) {
2982 if (dad_count
> dev_net(idev
->dev
)->ipv6
.sysctl
.idgen_retries
)
2991 static void addrconf_addr_gen(struct inet6_dev
*idev
, bool prefix_route
)
2993 struct in6_addr addr
;
2995 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2997 if (idev
->addr_gen_mode
== IN6_ADDR_GEN_MODE_STABLE_PRIVACY
) {
2998 if (!ipv6_generate_stable_address(&addr
, 0, idev
))
2999 addrconf_add_linklocal(idev
, &addr
,
3000 IFA_F_STABLE_PRIVACY
);
3001 else if (prefix_route
)
3002 addrconf_prefix_route(&addr
, 64, idev
->dev
, 0, 0);
3003 } else if (idev
->addr_gen_mode
== IN6_ADDR_GEN_MODE_EUI64
) {
3004 /* addrconf_add_linklocal also adds a prefix_route and we
3005 * only need to care about prefix routes if ipv6_generate_eui64
3006 * couldn't generate one.
3008 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) == 0)
3009 addrconf_add_linklocal(idev
, &addr
, 0);
3010 else if (prefix_route
)
3011 addrconf_prefix_route(&addr
, 64, idev
->dev
, 0, 0);
3015 static void addrconf_dev_config(struct net_device
*dev
)
3017 struct inet6_dev
*idev
;
3021 if ((dev
->type
!= ARPHRD_ETHER
) &&
3022 (dev
->type
!= ARPHRD_FDDI
) &&
3023 (dev
->type
!= ARPHRD_ARCNET
) &&
3024 (dev
->type
!= ARPHRD_INFINIBAND
) &&
3025 (dev
->type
!= ARPHRD_IEEE802154
) &&
3026 (dev
->type
!= ARPHRD_IEEE1394
) &&
3027 (dev
->type
!= ARPHRD_TUNNEL6
) &&
3028 (dev
->type
!= ARPHRD_6LOWPAN
)) {
3029 /* Alas, we support only Ethernet autoconfiguration. */
3033 idev
= addrconf_add_dev(dev
);
3037 addrconf_addr_gen(idev
, false);
3040 #if IS_ENABLED(CONFIG_IPV6_SIT)
3041 static void addrconf_sit_config(struct net_device
*dev
)
3043 struct inet6_dev
*idev
;
3048 * Configure the tunnel with one of our IPv4
3049 * addresses... we should configure all of
3050 * our v4 addrs in the tunnel
3053 idev
= ipv6_find_idev(dev
);
3055 pr_debug("%s: add_dev failed\n", __func__
);
3059 if (dev
->priv_flags
& IFF_ISATAP
) {
3060 addrconf_addr_gen(idev
, false);
3064 sit_add_v4_addrs(idev
);
3066 if (dev
->flags
&IFF_POINTOPOINT
)
3067 addrconf_add_mroute(dev
);
3071 #if IS_ENABLED(CONFIG_NET_IPGRE)
3072 static void addrconf_gre_config(struct net_device
*dev
)
3074 struct inet6_dev
*idev
;
3078 idev
= ipv6_find_idev(dev
);
3080 pr_debug("%s: add_dev failed\n", __func__
);
3084 addrconf_addr_gen(idev
, true);
3088 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
3091 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
3092 struct inet6_dev
*idev
= __in6_dev_get(dev
);
3093 int run_pending
= 0;
3097 case NETDEV_REGISTER
:
3098 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
3099 idev
= ipv6_add_dev(dev
);
3101 return notifier_from_errno(PTR_ERR(idev
));
3107 if (dev
->flags
& IFF_SLAVE
)
3110 if (idev
&& idev
->cnf
.disable_ipv6
)
3113 if (event
== NETDEV_UP
) {
3114 if (!addrconf_qdisc_ok(dev
)) {
3115 /* device is not ready yet. */
3116 pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n",
3121 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
3122 idev
= ipv6_add_dev(dev
);
3124 if (!IS_ERR_OR_NULL(idev
)) {
3125 idev
->if_flags
|= IF_READY
;
3129 if (!addrconf_qdisc_ok(dev
)) {
3130 /* device is still not ready. */
3135 if (idev
->if_flags
& IF_READY
)
3136 /* device is already configured. */
3138 idev
->if_flags
|= IF_READY
;
3141 pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n",
3147 switch (dev
->type
) {
3148 #if IS_ENABLED(CONFIG_IPV6_SIT)
3150 addrconf_sit_config(dev
);
3153 #if IS_ENABLED(CONFIG_NET_IPGRE)
3155 addrconf_gre_config(dev
);
3158 case ARPHRD_LOOPBACK
:
3163 addrconf_dev_config(dev
);
3167 if (!IS_ERR_OR_NULL(idev
)) {
3169 addrconf_dad_run(idev
);
3172 * If the MTU changed during the interface down,
3173 * when the interface up, the changed MTU must be
3174 * reflected in the idev as well as routers.
3176 if (idev
->cnf
.mtu6
!= dev
->mtu
&&
3177 dev
->mtu
>= IPV6_MIN_MTU
) {
3178 rt6_mtu_change(dev
, dev
->mtu
);
3179 idev
->cnf
.mtu6
= dev
->mtu
;
3181 idev
->tstamp
= jiffies
;
3182 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
3185 * If the changed mtu during down is lower than
3186 * IPV6_MIN_MTU stop IPv6 on this interface.
3188 if (dev
->mtu
< IPV6_MIN_MTU
)
3189 addrconf_ifdown(dev
, 1);
3193 case NETDEV_CHANGEMTU
:
3194 if (idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
3195 rt6_mtu_change(dev
, dev
->mtu
);
3196 idev
->cnf
.mtu6
= dev
->mtu
;
3200 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
3201 idev
= ipv6_add_dev(dev
);
3207 * if MTU under IPV6_MIN_MTU.
3208 * Stop IPv6 on this interface.
3212 case NETDEV_UNREGISTER
:
3214 * Remove all addresses from this interface.
3216 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
3219 case NETDEV_CHANGENAME
:
3221 snmp6_unregister_dev(idev
);
3222 addrconf_sysctl_unregister(idev
);
3223 err
= addrconf_sysctl_register(idev
);
3225 return notifier_from_errno(err
);
3226 err
= snmp6_register_dev(idev
);
3228 addrconf_sysctl_unregister(idev
);
3229 return notifier_from_errno(err
);
3234 case NETDEV_PRE_TYPE_CHANGE
:
3235 case NETDEV_POST_TYPE_CHANGE
:
3236 addrconf_type_change(dev
, event
);
3244 * addrconf module should be notified of a device going up
3246 static struct notifier_block ipv6_dev_notf
= {
3247 .notifier_call
= addrconf_notify
,
3250 static void addrconf_type_change(struct net_device
*dev
, unsigned long event
)
3252 struct inet6_dev
*idev
;
3255 idev
= __in6_dev_get(dev
);
3257 if (event
== NETDEV_POST_TYPE_CHANGE
)
3258 ipv6_mc_remap(idev
);
3259 else if (event
== NETDEV_PRE_TYPE_CHANGE
)
3260 ipv6_mc_unmap(idev
);
3263 static int addrconf_ifdown(struct net_device
*dev
, int how
)
3265 struct net
*net
= dev_net(dev
);
3266 struct inet6_dev
*idev
;
3267 struct inet6_ifaddr
*ifa
;
3272 rt6_ifdown(net
, dev
);
3273 neigh_ifdown(&nd_tbl
, dev
);
3275 idev
= __in6_dev_get(dev
);
3280 * Step 1: remove reference to ipv6 device from parent device.
3286 /* protected by rtnl_lock */
3287 RCU_INIT_POINTER(dev
->ip6_ptr
, NULL
);
3289 /* Step 1.5: remove snmp6 entry */
3290 snmp6_unregister_dev(idev
);
3294 /* Step 2: clear hash table */
3295 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
3296 struct hlist_head
*h
= &inet6_addr_lst
[i
];
3298 spin_lock_bh(&addrconf_hash_lock
);
3300 hlist_for_each_entry_rcu(ifa
, h
, addr_lst
) {
3301 if (ifa
->idev
== idev
) {
3302 hlist_del_init_rcu(&ifa
->addr_lst
);
3303 addrconf_del_dad_work(ifa
);
3307 spin_unlock_bh(&addrconf_hash_lock
);
3310 write_lock_bh(&idev
->lock
);
3312 addrconf_del_rs_timer(idev
);
3314 /* Step 2: clear flags for stateless addrconf */
3316 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
3318 if (how
&& del_timer(&idev
->regen_timer
))
3321 /* Step 3: clear tempaddr list */
3322 while (!list_empty(&idev
->tempaddr_list
)) {
3323 ifa
= list_first_entry(&idev
->tempaddr_list
,
3324 struct inet6_ifaddr
, tmp_list
);
3325 list_del(&ifa
->tmp_list
);
3326 write_unlock_bh(&idev
->lock
);
3327 spin_lock_bh(&ifa
->lock
);
3330 in6_ifa_put(ifa
->ifpub
);
3333 spin_unlock_bh(&ifa
->lock
);
3335 write_lock_bh(&idev
->lock
);
3338 while (!list_empty(&idev
->addr_list
)) {
3339 ifa
= list_first_entry(&idev
->addr_list
,
3340 struct inet6_ifaddr
, if_list
);
3341 addrconf_del_dad_work(ifa
);
3343 list_del(&ifa
->if_list
);
3345 write_unlock_bh(&idev
->lock
);
3347 spin_lock_bh(&ifa
->lock
);
3349 ifa
->state
= INET6_IFADDR_STATE_DEAD
;
3350 spin_unlock_bh(&ifa
->lock
);
3352 if (state
!= INET6_IFADDR_STATE_DEAD
) {
3353 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
3354 inet6addr_notifier_call_chain(NETDEV_DOWN
, ifa
);
3358 write_lock_bh(&idev
->lock
);
3361 write_unlock_bh(&idev
->lock
);
3363 /* Step 5: Discard anycast and multicast list */
3365 ipv6_ac_destroy_dev(idev
);
3366 ipv6_mc_destroy_dev(idev
);
3371 idev
->tstamp
= jiffies
;
3373 /* Last: Shot the device (if unregistered) */
3375 addrconf_sysctl_unregister(idev
);
3376 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
3377 neigh_ifdown(&nd_tbl
, dev
);
3383 static void addrconf_rs_timer(unsigned long data
)
3385 struct inet6_dev
*idev
= (struct inet6_dev
*)data
;
3386 struct net_device
*dev
= idev
->dev
;
3387 struct in6_addr lladdr
;
3389 write_lock(&idev
->lock
);
3390 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
))
3393 if (!ipv6_accept_ra(idev
))
3396 /* Announcement received after solicitation was sent */
3397 if (idev
->if_flags
& IF_RA_RCVD
)
3400 if (idev
->rs_probes
++ < idev
->cnf
.rtr_solicits
) {
3401 write_unlock(&idev
->lock
);
3402 if (!ipv6_get_lladdr(dev
, &lladdr
, IFA_F_TENTATIVE
))
3403 ndisc_send_rs(dev
, &lladdr
,
3404 &in6addr_linklocal_allrouters
);
3408 write_lock(&idev
->lock
);
3409 /* The wait after the last probe can be shorter */
3410 addrconf_mod_rs_timer(idev
, (idev
->rs_probes
==
3411 idev
->cnf
.rtr_solicits
) ?
3412 idev
->cnf
.rtr_solicit_delay
:
3413 idev
->cnf
.rtr_solicit_interval
);
3416 * Note: we do not support deprecated "all on-link"
3417 * assumption any longer.
3419 pr_debug("%s: no IPv6 routers present\n", idev
->dev
->name
);
3423 write_unlock(&idev
->lock
);
3429 * Duplicate Address Detection
3431 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
3433 unsigned long rand_num
;
3434 struct inet6_dev
*idev
= ifp
->idev
;
3436 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
3439 rand_num
= prandom_u32() % (idev
->cnf
.rtr_solicit_delay
? : 1);
3441 ifp
->dad_probes
= idev
->cnf
.dad_transmits
;
3442 addrconf_mod_dad_work(ifp
, rand_num
);
3445 static void addrconf_dad_begin(struct inet6_ifaddr
*ifp
)
3447 struct inet6_dev
*idev
= ifp
->idev
;
3448 struct net_device
*dev
= idev
->dev
;
3450 addrconf_join_solict(dev
, &ifp
->addr
);
3452 prandom_seed((__force u32
) ifp
->addr
.s6_addr32
[3]);
3454 read_lock_bh(&idev
->lock
);
3455 spin_lock(&ifp
->lock
);
3456 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
)
3459 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
3460 idev
->cnf
.accept_dad
< 1 ||
3461 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
3462 ifp
->flags
& IFA_F_NODAD
) {
3463 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3464 spin_unlock(&ifp
->lock
);
3465 read_unlock_bh(&idev
->lock
);
3467 addrconf_dad_completed(ifp
);
3471 if (!(idev
->if_flags
& IF_READY
)) {
3472 spin_unlock(&ifp
->lock
);
3473 read_unlock_bh(&idev
->lock
);
3475 * If the device is not ready:
3476 * - keep it tentative if it is a permanent address.
3477 * - otherwise, kill it.
3480 addrconf_dad_stop(ifp
, 0);
3485 * Optimistic nodes can start receiving
3488 if (ifp
->flags
& IFA_F_OPTIMISTIC
) {
3489 ip6_ins_rt(ifp
->rt
);
3490 if (ipv6_use_optimistic_addr(idev
)) {
3491 /* Because optimistic nodes can use this address,
3492 * notify listeners. If DAD fails, RTM_DELADDR is sent.
3494 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
3498 addrconf_dad_kick(ifp
);
3500 spin_unlock(&ifp
->lock
);
3501 read_unlock_bh(&idev
->lock
);
3504 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
)
3506 bool begin_dad
= false;
3508 spin_lock_bh(&ifp
->lock
);
3509 if (ifp
->state
!= INET6_IFADDR_STATE_DEAD
) {
3510 ifp
->state
= INET6_IFADDR_STATE_PREDAD
;
3513 spin_unlock_bh(&ifp
->lock
);
3516 addrconf_mod_dad_work(ifp
, 0);
3519 static void addrconf_dad_work(struct work_struct
*w
)
3521 struct inet6_ifaddr
*ifp
= container_of(to_delayed_work(w
),
3522 struct inet6_ifaddr
,
3524 struct inet6_dev
*idev
= ifp
->idev
;
3525 struct in6_addr mcaddr
;
3531 } action
= DAD_PROCESS
;
3535 spin_lock_bh(&ifp
->lock
);
3536 if (ifp
->state
== INET6_IFADDR_STATE_PREDAD
) {
3538 ifp
->state
= INET6_IFADDR_STATE_DAD
;
3539 } else if (ifp
->state
== INET6_IFADDR_STATE_ERRDAD
) {
3541 ifp
->state
= INET6_IFADDR_STATE_POSTDAD
;
3543 spin_unlock_bh(&ifp
->lock
);
3545 if (action
== DAD_BEGIN
) {
3546 addrconf_dad_begin(ifp
);
3548 } else if (action
== DAD_ABORT
) {
3549 addrconf_dad_stop(ifp
, 1);
3553 if (!ifp
->dad_probes
&& addrconf_dad_end(ifp
))
3556 write_lock_bh(&idev
->lock
);
3557 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
)) {
3558 write_unlock_bh(&idev
->lock
);
3562 spin_lock(&ifp
->lock
);
3563 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
) {
3564 spin_unlock(&ifp
->lock
);
3565 write_unlock_bh(&idev
->lock
);
3569 if (ifp
->dad_probes
== 0) {
3571 * DAD was successful
3574 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3575 spin_unlock(&ifp
->lock
);
3576 write_unlock_bh(&idev
->lock
);
3578 addrconf_dad_completed(ifp
);
3584 addrconf_mod_dad_work(ifp
,
3585 NEIGH_VAR(ifp
->idev
->nd_parms
, RETRANS_TIME
));
3586 spin_unlock(&ifp
->lock
);
3587 write_unlock_bh(&idev
->lock
);
3589 /* send a neighbour solicitation for our addr */
3590 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
3591 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &in6addr_any
);
3597 /* ifp->idev must be at least read locked */
3598 static bool ipv6_lonely_lladdr(struct inet6_ifaddr
*ifp
)
3600 struct inet6_ifaddr
*ifpiter
;
3601 struct inet6_dev
*idev
= ifp
->idev
;
3603 list_for_each_entry_reverse(ifpiter
, &idev
->addr_list
, if_list
) {
3604 if (ifpiter
->scope
> IFA_LINK
)
3606 if (ifp
!= ifpiter
&& ifpiter
->scope
== IFA_LINK
&&
3607 (ifpiter
->flags
& (IFA_F_PERMANENT
|IFA_F_TENTATIVE
|
3608 IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
)) ==
3615 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
3617 struct net_device
*dev
= ifp
->idev
->dev
;
3618 struct in6_addr lladdr
;
3619 bool send_rs
, send_mld
;
3621 addrconf_del_dad_work(ifp
);
3624 * Configure the address for reception. Now it is valid.
3627 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
3629 /* If added prefix is link local and we are prepared to process
3630 router advertisements, start sending router solicitations.
3633 read_lock_bh(&ifp
->idev
->lock
);
3634 send_mld
= ifp
->scope
== IFA_LINK
&& ipv6_lonely_lladdr(ifp
);
3635 send_rs
= send_mld
&&
3636 ipv6_accept_ra(ifp
->idev
) &&
3637 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
3638 (dev
->flags
&IFF_LOOPBACK
) == 0;
3639 read_unlock_bh(&ifp
->idev
->lock
);
3641 /* While dad is in progress mld report's source address is in6_addrany.
3642 * Resend with proper ll now.
3645 ipv6_mc_dad_complete(ifp
->idev
);
3649 * If a host as already performed a random delay
3650 * [...] as part of DAD [...] there is no need
3651 * to delay again before sending the first RS
3653 if (ipv6_get_lladdr(dev
, &lladdr
, IFA_F_TENTATIVE
))
3655 ndisc_send_rs(dev
, &lladdr
, &in6addr_linklocal_allrouters
);
3657 write_lock_bh(&ifp
->idev
->lock
);
3658 spin_lock(&ifp
->lock
);
3659 ifp
->idev
->rs_probes
= 1;
3660 ifp
->idev
->if_flags
|= IF_RS_SENT
;
3661 addrconf_mod_rs_timer(ifp
->idev
,
3662 ifp
->idev
->cnf
.rtr_solicit_interval
);
3663 spin_unlock(&ifp
->lock
);
3664 write_unlock_bh(&ifp
->idev
->lock
);
3668 static void addrconf_dad_run(struct inet6_dev
*idev
)
3670 struct inet6_ifaddr
*ifp
;
3672 read_lock_bh(&idev
->lock
);
3673 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
3674 spin_lock(&ifp
->lock
);
3675 if (ifp
->flags
& IFA_F_TENTATIVE
&&
3676 ifp
->state
== INET6_IFADDR_STATE_DAD
)
3677 addrconf_dad_kick(ifp
);
3678 spin_unlock(&ifp
->lock
);
3680 read_unlock_bh(&idev
->lock
);
3683 #ifdef CONFIG_PROC_FS
3684 struct if6_iter_state
{
3685 struct seq_net_private p
;
3690 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
, loff_t pos
)
3692 struct inet6_ifaddr
*ifa
= NULL
;
3693 struct if6_iter_state
*state
= seq
->private;
3694 struct net
*net
= seq_file_net(seq
);
3697 /* initial bucket if pos is 0 */
3703 for (; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
3704 hlist_for_each_entry_rcu_bh(ifa
, &inet6_addr_lst
[state
->bucket
],
3706 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
3708 /* sync with offset */
3709 if (p
< state
->offset
) {
3717 /* prepare for next bucket */
3724 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
,
3725 struct inet6_ifaddr
*ifa
)
3727 struct if6_iter_state
*state
= seq
->private;
3728 struct net
*net
= seq_file_net(seq
);
3730 hlist_for_each_entry_continue_rcu_bh(ifa
, addr_lst
) {
3731 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
3737 while (++state
->bucket
< IN6_ADDR_HSIZE
) {
3739 hlist_for_each_entry_rcu_bh(ifa
,
3740 &inet6_addr_lst
[state
->bucket
], addr_lst
) {
3741 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
3751 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
3755 return if6_get_first(seq
, *pos
);
3758 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
3760 struct inet6_ifaddr
*ifa
;
3762 ifa
= if6_get_next(seq
, v
);
3767 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
3770 rcu_read_unlock_bh();
3773 static int if6_seq_show(struct seq_file
*seq
, void *v
)
3775 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
3776 seq_printf(seq
, "%pi6 %02x %02x %02x %02x %8s\n",
3778 ifp
->idev
->dev
->ifindex
,
3782 ifp
->idev
->dev
->name
);
3786 static const struct seq_operations if6_seq_ops
= {
3787 .start
= if6_seq_start
,
3788 .next
= if6_seq_next
,
3789 .show
= if6_seq_show
,
3790 .stop
= if6_seq_stop
,
3793 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
3795 return seq_open_net(inode
, file
, &if6_seq_ops
,
3796 sizeof(struct if6_iter_state
));
3799 static const struct file_operations if6_fops
= {
3800 .owner
= THIS_MODULE
,
3801 .open
= if6_seq_open
,
3803 .llseek
= seq_lseek
,
3804 .release
= seq_release_net
,
3807 static int __net_init
if6_proc_net_init(struct net
*net
)
3809 if (!proc_create("if_inet6", S_IRUGO
, net
->proc_net
, &if6_fops
))
3814 static void __net_exit
if6_proc_net_exit(struct net
*net
)
3816 remove_proc_entry("if_inet6", net
->proc_net
);
3819 static struct pernet_operations if6_proc_net_ops
= {
3820 .init
= if6_proc_net_init
,
3821 .exit
= if6_proc_net_exit
,
3824 int __init
if6_proc_init(void)
3826 return register_pernet_subsys(&if6_proc_net_ops
);
3829 void if6_proc_exit(void)
3831 unregister_pernet_subsys(&if6_proc_net_ops
);
3833 #endif /* CONFIG_PROC_FS */
3835 #if IS_ENABLED(CONFIG_IPV6_MIP6)
3836 /* Check if address is a home address configured on any interface. */
3837 int ipv6_chk_home_addr(struct net
*net
, const struct in6_addr
*addr
)
3840 struct inet6_ifaddr
*ifp
= NULL
;
3841 unsigned int hash
= inet6_addr_hash(addr
);
3844 hlist_for_each_entry_rcu_bh(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
3845 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
3847 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
3848 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
3853 rcu_read_unlock_bh();
3859 * Periodic address status verification
3862 static void addrconf_verify_rtnl(void)
3864 unsigned long now
, next
, next_sec
, next_sched
;
3865 struct inet6_ifaddr
*ifp
;
3872 next
= round_jiffies_up(now
+ ADDR_CHECK_FREQUENCY
);
3874 cancel_delayed_work(&addr_chk_work
);
3876 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
3878 hlist_for_each_entry_rcu_bh(ifp
, &inet6_addr_lst
[i
], addr_lst
) {
3881 /* When setting preferred_lft to a value not zero or
3882 * infinity, while valid_lft is infinity
3883 * IFA_F_PERMANENT has a non-infinity life time.
3885 if ((ifp
->flags
& IFA_F_PERMANENT
) &&
3886 (ifp
->prefered_lft
== INFINITY_LIFE_TIME
))
3889 spin_lock(&ifp
->lock
);
3890 /* We try to batch several events at once. */
3891 age
= (now
- ifp
->tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
3893 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
3894 age
>= ifp
->valid_lft
) {
3895 spin_unlock(&ifp
->lock
);
3899 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
3900 spin_unlock(&ifp
->lock
);
3902 } else if (age
>= ifp
->prefered_lft
) {
3903 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
3906 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
3908 ifp
->flags
|= IFA_F_DEPRECATED
;
3911 if ((ifp
->valid_lft
!= INFINITY_LIFE_TIME
) &&
3912 (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
)))
3913 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
3915 spin_unlock(&ifp
->lock
);
3920 ipv6_ifa_notify(0, ifp
);
3924 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
3925 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
3926 unsigned long regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
3927 ifp
->idev
->cnf
.dad_transmits
*
3928 NEIGH_VAR(ifp
->idev
->nd_parms
, RETRANS_TIME
) / HZ
;
3930 if (age
>= ifp
->prefered_lft
- regen_advance
) {
3931 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
3932 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3933 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3934 if (!ifp
->regen_count
&& ifpub
) {
3937 in6_ifa_hold(ifpub
);
3938 spin_unlock(&ifp
->lock
);
3940 spin_lock(&ifpub
->lock
);
3941 ifpub
->regen_count
= 0;
3942 spin_unlock(&ifpub
->lock
);
3943 ipv6_create_tempaddr(ifpub
, ifp
);
3948 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
3949 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
3950 spin_unlock(&ifp
->lock
);
3952 /* ifp->prefered_lft <= ifp->valid_lft */
3953 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3954 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3955 spin_unlock(&ifp
->lock
);
3960 next_sec
= round_jiffies_up(next
);
3963 /* If rounded timeout is accurate enough, accept it. */
3964 if (time_before(next_sec
, next
+ ADDRCONF_TIMER_FUZZ
))
3965 next_sched
= next_sec
;
3967 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
3968 if (time_before(next_sched
, jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
))
3969 next_sched
= jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
;
3971 ADBG(KERN_DEBUG
"now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
3972 now
, next
, next_sec
, next_sched
);
3973 mod_delayed_work(addrconf_wq
, &addr_chk_work
, next_sched
- now
);
3974 rcu_read_unlock_bh();
3977 static void addrconf_verify_work(struct work_struct
*w
)
3980 addrconf_verify_rtnl();
3984 static void addrconf_verify(void)
3986 mod_delayed_work(addrconf_wq
, &addr_chk_work
, 0);
3989 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
,
3990 struct in6_addr
**peer_pfx
)
3992 struct in6_addr
*pfx
= NULL
;
3997 pfx
= nla_data(addr
);
4000 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
4002 pfx
= nla_data(local
);
4008 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
4009 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
4010 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
4011 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
4012 [IFA_FLAGS
] = { .len
= sizeof(u32
) },
4016 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
4018 struct net
*net
= sock_net(skb
->sk
);
4019 struct ifaddrmsg
*ifm
;
4020 struct nlattr
*tb
[IFA_MAX
+1];
4021 struct in6_addr
*pfx
, *peer_pfx
;
4025 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
4029 ifm
= nlmsg_data(nlh
);
4030 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer_pfx
);
4034 ifa_flags
= tb
[IFA_FLAGS
] ? nla_get_u32(tb
[IFA_FLAGS
]) : ifm
->ifa_flags
;
4036 /* We ignore other flags so far. */
4037 ifa_flags
&= IFA_F_MANAGETEMPADDR
;
4039 return inet6_addr_del(net
, ifm
->ifa_index
, ifa_flags
, pfx
,
4040 ifm
->ifa_prefixlen
);
4043 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u32 ifa_flags
,
4044 u32 prefered_lft
, u32 valid_lft
)
4048 unsigned long timeout
;
4049 bool was_managetempaddr
;
4050 bool had_prefixroute
;
4054 if (!valid_lft
|| (prefered_lft
> valid_lft
))
4057 if (ifa_flags
& IFA_F_MANAGETEMPADDR
&&
4058 (ifp
->flags
& IFA_F_TEMPORARY
|| ifp
->prefix_len
!= 64))
4061 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
4062 if (addrconf_finite_timeout(timeout
)) {
4063 expires
= jiffies_to_clock_t(timeout
* HZ
);
4064 valid_lft
= timeout
;
4065 flags
= RTF_EXPIRES
;
4069 ifa_flags
|= IFA_F_PERMANENT
;
4072 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
4073 if (addrconf_finite_timeout(timeout
)) {
4075 ifa_flags
|= IFA_F_DEPRECATED
;
4076 prefered_lft
= timeout
;
4079 spin_lock_bh(&ifp
->lock
);
4080 was_managetempaddr
= ifp
->flags
& IFA_F_MANAGETEMPADDR
;
4081 had_prefixroute
= ifp
->flags
& IFA_F_PERMANENT
&&
4082 !(ifp
->flags
& IFA_F_NOPREFIXROUTE
);
4083 ifp
->flags
&= ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
|
4084 IFA_F_HOMEADDRESS
| IFA_F_MANAGETEMPADDR
|
4085 IFA_F_NOPREFIXROUTE
);
4086 ifp
->flags
|= ifa_flags
;
4087 ifp
->tstamp
= jiffies
;
4088 ifp
->valid_lft
= valid_lft
;
4089 ifp
->prefered_lft
= prefered_lft
;
4091 spin_unlock_bh(&ifp
->lock
);
4092 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
4093 ipv6_ifa_notify(0, ifp
);
4095 if (!(ifa_flags
& IFA_F_NOPREFIXROUTE
)) {
4096 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
4098 } else if (had_prefixroute
) {
4099 enum cleanup_prefix_rt_t action
;
4100 unsigned long rt_expires
;
4102 write_lock_bh(&ifp
->idev
->lock
);
4103 action
= check_cleanup_prefix_route(ifp
, &rt_expires
);
4104 write_unlock_bh(&ifp
->idev
->lock
);
4106 if (action
!= CLEANUP_PREFIX_RT_NOP
) {
4107 cleanup_prefix_route(ifp
, rt_expires
,
4108 action
== CLEANUP_PREFIX_RT_DEL
);
4112 if (was_managetempaddr
|| ifp
->flags
& IFA_F_MANAGETEMPADDR
) {
4113 if (was_managetempaddr
&& !(ifp
->flags
& IFA_F_MANAGETEMPADDR
))
4114 valid_lft
= prefered_lft
= 0;
4115 manage_tempaddrs(ifp
->idev
, ifp
, valid_lft
, prefered_lft
,
4116 !was_managetempaddr
, jiffies
);
4119 addrconf_verify_rtnl();
4125 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
4127 struct net
*net
= sock_net(skb
->sk
);
4128 struct ifaddrmsg
*ifm
;
4129 struct nlattr
*tb
[IFA_MAX
+1];
4130 struct in6_addr
*pfx
, *peer_pfx
;
4131 struct inet6_ifaddr
*ifa
;
4132 struct net_device
*dev
;
4133 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
4137 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
4141 ifm
= nlmsg_data(nlh
);
4142 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer_pfx
);
4146 if (tb
[IFA_CACHEINFO
]) {
4147 struct ifa_cacheinfo
*ci
;
4149 ci
= nla_data(tb
[IFA_CACHEINFO
]);
4150 valid_lft
= ci
->ifa_valid
;
4151 preferred_lft
= ci
->ifa_prefered
;
4153 preferred_lft
= INFINITY_LIFE_TIME
;
4154 valid_lft
= INFINITY_LIFE_TIME
;
4157 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
4161 ifa_flags
= tb
[IFA_FLAGS
] ? nla_get_u32(tb
[IFA_FLAGS
]) : ifm
->ifa_flags
;
4163 /* We ignore other flags so far. */
4164 ifa_flags
&= IFA_F_NODAD
| IFA_F_HOMEADDRESS
| IFA_F_MANAGETEMPADDR
|
4165 IFA_F_NOPREFIXROUTE
| IFA_F_MCAUTOJOIN
;
4167 ifa
= ipv6_get_ifaddr(net
, pfx
, dev
, 1);
4170 * It would be best to check for !NLM_F_CREATE here but
4171 * userspace already relies on not having to provide this.
4173 return inet6_addr_add(net
, ifm
->ifa_index
, pfx
, peer_pfx
,
4174 ifm
->ifa_prefixlen
, ifa_flags
,
4175 preferred_lft
, valid_lft
);
4178 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
4179 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
4182 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
4189 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u32 flags
,
4190 u8 scope
, int ifindex
)
4192 struct ifaddrmsg
*ifm
;
4194 ifm
= nlmsg_data(nlh
);
4195 ifm
->ifa_family
= AF_INET6
;
4196 ifm
->ifa_prefixlen
= prefixlen
;
4197 ifm
->ifa_flags
= flags
;
4198 ifm
->ifa_scope
= scope
;
4199 ifm
->ifa_index
= ifindex
;
4202 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
4203 unsigned long tstamp
, u32 preferred
, u32 valid
)
4205 struct ifa_cacheinfo ci
;
4207 ci
.cstamp
= cstamp_delta(cstamp
);
4208 ci
.tstamp
= cstamp_delta(tstamp
);
4209 ci
.ifa_prefered
= preferred
;
4210 ci
.ifa_valid
= valid
;
4212 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
4215 static inline int rt_scope(int ifa_scope
)
4217 if (ifa_scope
& IFA_HOST
)
4218 return RT_SCOPE_HOST
;
4219 else if (ifa_scope
& IFA_LINK
)
4220 return RT_SCOPE_LINK
;
4221 else if (ifa_scope
& IFA_SITE
)
4222 return RT_SCOPE_SITE
;
4224 return RT_SCOPE_UNIVERSE
;
4227 static inline int inet6_ifaddr_msgsize(void)
4229 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
4230 + nla_total_size(16) /* IFA_LOCAL */
4231 + nla_total_size(16) /* IFA_ADDRESS */
4232 + nla_total_size(sizeof(struct ifa_cacheinfo
))
4233 + nla_total_size(4) /* IFA_FLAGS */;
4236 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
4237 u32 portid
, u32 seq
, int event
, unsigned int flags
)
4239 struct nlmsghdr
*nlh
;
4240 u32 preferred
, valid
;
4242 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
4246 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
4247 ifa
->idev
->dev
->ifindex
);
4249 if (!((ifa
->flags
&IFA_F_PERMANENT
) &&
4250 (ifa
->prefered_lft
== INFINITY_LIFE_TIME
))) {
4251 preferred
= ifa
->prefered_lft
;
4252 valid
= ifa
->valid_lft
;
4253 if (preferred
!= INFINITY_LIFE_TIME
) {
4254 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
4255 if (preferred
> tval
)
4259 if (valid
!= INFINITY_LIFE_TIME
) {
4267 preferred
= INFINITY_LIFE_TIME
;
4268 valid
= INFINITY_LIFE_TIME
;
4271 if (!ipv6_addr_any(&ifa
->peer_addr
)) {
4272 if (nla_put_in6_addr(skb
, IFA_LOCAL
, &ifa
->addr
) < 0 ||
4273 nla_put_in6_addr(skb
, IFA_ADDRESS
, &ifa
->peer_addr
) < 0)
4276 if (nla_put_in6_addr(skb
, IFA_ADDRESS
, &ifa
->addr
) < 0)
4279 if (put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0)
4282 if (nla_put_u32(skb
, IFA_FLAGS
, ifa
->flags
) < 0)
4285 nlmsg_end(skb
, nlh
);
4289 nlmsg_cancel(skb
, nlh
);
4293 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
4294 u32 portid
, u32 seq
, int event
, u16 flags
)
4296 struct nlmsghdr
*nlh
;
4297 u8 scope
= RT_SCOPE_UNIVERSE
;
4298 int ifindex
= ifmca
->idev
->dev
->ifindex
;
4300 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
4301 scope
= RT_SCOPE_SITE
;
4303 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
4307 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
4308 if (nla_put_in6_addr(skb
, IFA_MULTICAST
, &ifmca
->mca_addr
) < 0 ||
4309 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
4310 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
4311 nlmsg_cancel(skb
, nlh
);
4315 nlmsg_end(skb
, nlh
);
4319 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
4320 u32 portid
, u32 seq
, int event
, unsigned int flags
)
4322 struct nlmsghdr
*nlh
;
4323 u8 scope
= RT_SCOPE_UNIVERSE
;
4324 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
4326 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
4327 scope
= RT_SCOPE_SITE
;
4329 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
4333 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
4334 if (nla_put_in6_addr(skb
, IFA_ANYCAST
, &ifaca
->aca_addr
) < 0 ||
4335 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
4336 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
4337 nlmsg_cancel(skb
, nlh
);
4341 nlmsg_end(skb
, nlh
);
4351 /* called with rcu_read_lock() */
4352 static int in6_dump_addrs(struct inet6_dev
*idev
, struct sk_buff
*skb
,
4353 struct netlink_callback
*cb
, enum addr_type_t type
,
4354 int s_ip_idx
, int *p_ip_idx
)
4356 struct ifmcaddr6
*ifmca
;
4357 struct ifacaddr6
*ifaca
;
4359 int ip_idx
= *p_ip_idx
;
4361 read_lock_bh(&idev
->lock
);
4363 case UNICAST_ADDR
: {
4364 struct inet6_ifaddr
*ifa
;
4366 /* unicast address incl. temp addr */
4367 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
4368 if (++ip_idx
< s_ip_idx
)
4370 err
= inet6_fill_ifaddr(skb
, ifa
,
4371 NETLINK_CB(cb
->skb
).portid
,
4377 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
4381 case MULTICAST_ADDR
:
4382 /* multicast address */
4383 for (ifmca
= idev
->mc_list
; ifmca
;
4384 ifmca
= ifmca
->next
, ip_idx
++) {
4385 if (ip_idx
< s_ip_idx
)
4387 err
= inet6_fill_ifmcaddr(skb
, ifmca
,
4388 NETLINK_CB(cb
->skb
).portid
,
4397 /* anycast address */
4398 for (ifaca
= idev
->ac_list
; ifaca
;
4399 ifaca
= ifaca
->aca_next
, ip_idx
++) {
4400 if (ip_idx
< s_ip_idx
)
4402 err
= inet6_fill_ifacaddr(skb
, ifaca
,
4403 NETLINK_CB(cb
->skb
).portid
,
4414 read_unlock_bh(&idev
->lock
);
4419 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
4420 enum addr_type_t type
)
4422 struct net
*net
= sock_net(skb
->sk
);
4425 int s_idx
, s_ip_idx
;
4426 struct net_device
*dev
;
4427 struct inet6_dev
*idev
;
4428 struct hlist_head
*head
;
4431 s_idx
= idx
= cb
->args
[1];
4432 s_ip_idx
= ip_idx
= cb
->args
[2];
4435 cb
->seq
= atomic_read(&net
->ipv6
.dev_addr_genid
) ^ net
->dev_base_seq
;
4436 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
4438 head
= &net
->dev_index_head
[h
];
4439 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
4442 if (h
> s_h
|| idx
> s_idx
)
4445 idev
= __in6_dev_get(dev
);
4449 if (in6_dump_addrs(idev
, skb
, cb
, type
,
4450 s_ip_idx
, &ip_idx
) < 0)
4460 cb
->args
[2] = ip_idx
;
4465 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4467 enum addr_type_t type
= UNICAST_ADDR
;
4469 return inet6_dump_addr(skb
, cb
, type
);
4472 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4474 enum addr_type_t type
= MULTICAST_ADDR
;
4476 return inet6_dump_addr(skb
, cb
, type
);
4480 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4482 enum addr_type_t type
= ANYCAST_ADDR
;
4484 return inet6_dump_addr(skb
, cb
, type
);
4487 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
*nlh
)
4489 struct net
*net
= sock_net(in_skb
->sk
);
4490 struct ifaddrmsg
*ifm
;
4491 struct nlattr
*tb
[IFA_MAX
+1];
4492 struct in6_addr
*addr
= NULL
, *peer
;
4493 struct net_device
*dev
= NULL
;
4494 struct inet6_ifaddr
*ifa
;
4495 struct sk_buff
*skb
;
4498 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
4502 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer
);
4508 ifm
= nlmsg_data(nlh
);
4510 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
4512 ifa
= ipv6_get_ifaddr(net
, addr
, dev
, 1);
4514 err
= -EADDRNOTAVAIL
;
4518 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
);
4524 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).portid
,
4525 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
4527 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4528 WARN_ON(err
== -EMSGSIZE
);
4532 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).portid
);
4539 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
4541 struct sk_buff
*skb
;
4542 struct net
*net
= dev_net(ifa
->idev
->dev
);
4545 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
4549 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
4551 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4552 WARN_ON(err
== -EMSGSIZE
);
4556 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
4560 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
4563 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
4564 __s32
*array
, int bytes
)
4566 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
4568 memset(array
, 0, bytes
);
4569 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
4570 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
4571 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
4572 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
4573 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
4574 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
4575 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
4576 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
4577 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] =
4578 jiffies_to_msecs(cnf
->rtr_solicit_interval
);
4579 array
[DEVCONF_RTR_SOLICIT_DELAY
] =
4580 jiffies_to_msecs(cnf
->rtr_solicit_delay
);
4581 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
4582 array
[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL
] =
4583 jiffies_to_msecs(cnf
->mldv1_unsolicited_report_interval
);
4584 array
[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL
] =
4585 jiffies_to_msecs(cnf
->mldv2_unsolicited_report_interval
);
4586 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
4587 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
4588 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
4589 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
4590 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
4591 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
4592 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
4593 array
[DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT
] = cnf
->accept_ra_min_hop_limit
;
4594 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
4595 #ifdef CONFIG_IPV6_ROUTER_PREF
4596 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
4597 array
[DEVCONF_RTR_PROBE_INTERVAL
] =
4598 jiffies_to_msecs(cnf
->rtr_probe_interval
);
4599 #ifdef CONFIG_IPV6_ROUTE_INFO
4600 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
4603 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
4604 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
4605 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4606 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
4607 array
[DEVCONF_USE_OPTIMISTIC
] = cnf
->use_optimistic
;
4609 #ifdef CONFIG_IPV6_MROUTE
4610 array
[DEVCONF_MC_FORWARDING
] = cnf
->mc_forwarding
;
4612 array
[DEVCONF_DISABLE_IPV6
] = cnf
->disable_ipv6
;
4613 array
[DEVCONF_ACCEPT_DAD
] = cnf
->accept_dad
;
4614 array
[DEVCONF_FORCE_TLLAO
] = cnf
->force_tllao
;
4615 array
[DEVCONF_NDISC_NOTIFY
] = cnf
->ndisc_notify
;
4616 array
[DEVCONF_SUPPRESS_FRAG_NDISC
] = cnf
->suppress_frag_ndisc
;
4617 array
[DEVCONF_ACCEPT_RA_FROM_LOCAL
] = cnf
->accept_ra_from_local
;
4618 array
[DEVCONF_ACCEPT_RA_MTU
] = cnf
->accept_ra_mtu
;
4619 /* we omit DEVCONF_STABLE_SECRET for now */
4620 array
[DEVCONF_USE_OIF_ADDRS_ONLY
] = cnf
->use_oif_addrs_only
;
4623 static inline size_t inet6_ifla6_size(void)
4625 return nla_total_size(4) /* IFLA_INET6_FLAGS */
4626 + nla_total_size(sizeof(struct ifla_cacheinfo
))
4627 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
4628 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
4629 + nla_total_size(ICMP6_MIB_MAX
* 8) /* IFLA_INET6_ICMP6STATS */
4630 + nla_total_size(sizeof(struct in6_addr
)); /* IFLA_INET6_TOKEN */
4633 static inline size_t inet6_if_nlmsg_size(void)
4635 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
4636 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
4637 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
4638 + nla_total_size(4) /* IFLA_MTU */
4639 + nla_total_size(4) /* IFLA_LINK */
4640 + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
4643 static inline void __snmp6_fill_statsdev(u64
*stats
, atomic_long_t
*mib
,
4644 int items
, int bytes
)
4647 int pad
= bytes
- sizeof(u64
) * items
;
4650 /* Use put_unaligned() because stats may not be aligned for u64. */
4651 put_unaligned(items
, &stats
[0]);
4652 for (i
= 1; i
< items
; i
++)
4653 put_unaligned(atomic_long_read(&mib
[i
]), &stats
[i
]);
4655 memset(&stats
[items
], 0, pad
);
4658 static inline void __snmp6_fill_stats64(u64
*stats
, void __percpu
*mib
,
4659 int items
, int bytes
, size_t syncpoff
)
4662 int pad
= bytes
- sizeof(u64
) * items
;
4665 /* Use put_unaligned() because stats may not be aligned for u64. */
4666 put_unaligned(items
, &stats
[0]);
4667 for (i
= 1; i
< items
; i
++)
4668 put_unaligned(snmp_fold_field64(mib
, i
, syncpoff
), &stats
[i
]);
4670 memset(&stats
[items
], 0, pad
);
4673 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
4677 case IFLA_INET6_STATS
:
4678 __snmp6_fill_stats64(stats
, idev
->stats
.ipv6
,
4679 IPSTATS_MIB_MAX
, bytes
, offsetof(struct ipstats_mib
, syncp
));
4681 case IFLA_INET6_ICMP6STATS
:
4682 __snmp6_fill_statsdev(stats
, idev
->stats
.icmpv6dev
->mibs
, ICMP6_MIB_MAX
, bytes
);
4687 static int inet6_fill_ifla6_attrs(struct sk_buff
*skb
, struct inet6_dev
*idev
)
4690 struct ifla_cacheinfo ci
;
4692 if (nla_put_u32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
))
4693 goto nla_put_failure
;
4694 ci
.max_reasm_len
= IPV6_MAXPLEN
;
4695 ci
.tstamp
= cstamp_delta(idev
->tstamp
);
4696 ci
.reachable_time
= jiffies_to_msecs(idev
->nd_parms
->reachable_time
);
4697 ci
.retrans_time
= jiffies_to_msecs(NEIGH_VAR(idev
->nd_parms
, RETRANS_TIME
));
4698 if (nla_put(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
))
4699 goto nla_put_failure
;
4700 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
4702 goto nla_put_failure
;
4703 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
4705 /* XXX - MC not implemented */
4707 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
4709 goto nla_put_failure
;
4710 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
4712 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
4714 goto nla_put_failure
;
4715 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
4717 nla
= nla_reserve(skb
, IFLA_INET6_TOKEN
, sizeof(struct in6_addr
));
4719 goto nla_put_failure
;
4721 if (nla_put_u8(skb
, IFLA_INET6_ADDR_GEN_MODE
, idev
->addr_gen_mode
))
4722 goto nla_put_failure
;
4724 read_lock_bh(&idev
->lock
);
4725 memcpy(nla_data(nla
), idev
->token
.s6_addr
, nla_len(nla
));
4726 read_unlock_bh(&idev
->lock
);
4734 static size_t inet6_get_link_af_size(const struct net_device
*dev
)
4736 if (!__in6_dev_get(dev
))
4739 return inet6_ifla6_size();
4742 static int inet6_fill_link_af(struct sk_buff
*skb
, const struct net_device
*dev
)
4744 struct inet6_dev
*idev
= __in6_dev_get(dev
);
4749 if (inet6_fill_ifla6_attrs(skb
, idev
) < 0)
4755 static int inet6_set_iftoken(struct inet6_dev
*idev
, struct in6_addr
*token
)
4757 struct inet6_ifaddr
*ifp
;
4758 struct net_device
*dev
= idev
->dev
;
4759 bool update_rs
= false;
4760 struct in6_addr ll_addr
;
4766 if (ipv6_addr_any(token
))
4768 if (dev
->flags
& (IFF_LOOPBACK
| IFF_NOARP
))
4770 if (!ipv6_accept_ra(idev
))
4772 if (idev
->cnf
.rtr_solicits
<= 0)
4775 write_lock_bh(&idev
->lock
);
4777 BUILD_BUG_ON(sizeof(token
->s6_addr
) != 16);
4778 memcpy(idev
->token
.s6_addr
+ 8, token
->s6_addr
+ 8, 8);
4780 write_unlock_bh(&idev
->lock
);
4782 if (!idev
->dead
&& (idev
->if_flags
& IF_READY
) &&
4783 !ipv6_get_lladdr(dev
, &ll_addr
, IFA_F_TENTATIVE
|
4784 IFA_F_OPTIMISTIC
)) {
4786 /* If we're not ready, then normal ifup will take care
4787 * of this. Otherwise, we need to request our rs here.
4789 ndisc_send_rs(dev
, &ll_addr
, &in6addr_linklocal_allrouters
);
4793 write_lock_bh(&idev
->lock
);
4796 idev
->if_flags
|= IF_RS_SENT
;
4797 idev
->rs_probes
= 1;
4798 addrconf_mod_rs_timer(idev
, idev
->cnf
.rtr_solicit_interval
);
4801 /* Well, that's kinda nasty ... */
4802 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
4803 spin_lock(&ifp
->lock
);
4804 if (ifp
->tokenized
) {
4806 ifp
->prefered_lft
= 0;
4808 spin_unlock(&ifp
->lock
);
4811 write_unlock_bh(&idev
->lock
);
4812 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
4813 addrconf_verify_rtnl();
4817 static const struct nla_policy inet6_af_policy
[IFLA_INET6_MAX
+ 1] = {
4818 [IFLA_INET6_ADDR_GEN_MODE
] = { .type
= NLA_U8
},
4819 [IFLA_INET6_TOKEN
] = { .len
= sizeof(struct in6_addr
) },
4822 static int inet6_validate_link_af(const struct net_device
*dev
,
4823 const struct nlattr
*nla
)
4825 struct nlattr
*tb
[IFLA_INET6_MAX
+ 1];
4827 if (dev
&& !__in6_dev_get(dev
))
4828 return -EAFNOSUPPORT
;
4830 return nla_parse_nested(tb
, IFLA_INET6_MAX
, nla
, inet6_af_policy
);
4833 static int inet6_set_link_af(struct net_device
*dev
, const struct nlattr
*nla
)
4836 struct inet6_dev
*idev
= __in6_dev_get(dev
);
4837 struct nlattr
*tb
[IFLA_INET6_MAX
+ 1];
4840 return -EAFNOSUPPORT
;
4842 if (nla_parse_nested(tb
, IFLA_INET6_MAX
, nla
, NULL
) < 0)
4845 if (tb
[IFLA_INET6_TOKEN
]) {
4846 err
= inet6_set_iftoken(idev
, nla_data(tb
[IFLA_INET6_TOKEN
]));
4851 if (tb
[IFLA_INET6_ADDR_GEN_MODE
]) {
4852 u8 mode
= nla_get_u8(tb
[IFLA_INET6_ADDR_GEN_MODE
]);
4854 if (mode
!= IN6_ADDR_GEN_MODE_EUI64
&&
4855 mode
!= IN6_ADDR_GEN_MODE_NONE
&&
4856 mode
!= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
)
4859 if (mode
== IN6_ADDR_GEN_MODE_STABLE_PRIVACY
&&
4860 !idev
->cnf
.stable_secret
.initialized
&&
4861 !dev_net(dev
)->ipv6
.devconf_dflt
->stable_secret
.initialized
)
4864 idev
->addr_gen_mode
= mode
;
4871 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
4872 u32 portid
, u32 seq
, int event
, unsigned int flags
)
4874 struct net_device
*dev
= idev
->dev
;
4875 struct ifinfomsg
*hdr
;
4876 struct nlmsghdr
*nlh
;
4879 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*hdr
), flags
);
4883 hdr
= nlmsg_data(nlh
);
4884 hdr
->ifi_family
= AF_INET6
;
4886 hdr
->ifi_type
= dev
->type
;
4887 hdr
->ifi_index
= dev
->ifindex
;
4888 hdr
->ifi_flags
= dev_get_flags(dev
);
4889 hdr
->ifi_change
= 0;
4891 if (nla_put_string(skb
, IFLA_IFNAME
, dev
->name
) ||
4893 nla_put(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
)) ||
4894 nla_put_u32(skb
, IFLA_MTU
, dev
->mtu
) ||
4895 (dev
->ifindex
!= dev_get_iflink(dev
) &&
4896 nla_put_u32(skb
, IFLA_LINK
, dev_get_iflink(dev
))))
4897 goto nla_put_failure
;
4898 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
4900 goto nla_put_failure
;
4902 if (inet6_fill_ifla6_attrs(skb
, idev
) < 0)
4903 goto nla_put_failure
;
4905 nla_nest_end(skb
, protoinfo
);
4906 nlmsg_end(skb
, nlh
);
4910 nlmsg_cancel(skb
, nlh
);
4914 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4916 struct net
*net
= sock_net(skb
->sk
);
4919 struct net_device
*dev
;
4920 struct inet6_dev
*idev
;
4921 struct hlist_head
*head
;
4924 s_idx
= cb
->args
[1];
4927 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
4929 head
= &net
->dev_index_head
[h
];
4930 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
4933 idev
= __in6_dev_get(dev
);
4936 if (inet6_fill_ifinfo(skb
, idev
,
4937 NETLINK_CB(cb
->skb
).portid
,
4939 RTM_NEWLINK
, NLM_F_MULTI
) < 0)
4953 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
4955 struct sk_buff
*skb
;
4956 struct net
*net
= dev_net(idev
->dev
);
4959 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
4963 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
4965 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
4966 WARN_ON(err
== -EMSGSIZE
);
4970 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFINFO
, NULL
, GFP_ATOMIC
);
4974 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFINFO
, err
);
4977 static inline size_t inet6_prefix_nlmsg_size(void)
4979 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
4980 + nla_total_size(sizeof(struct in6_addr
))
4981 + nla_total_size(sizeof(struct prefix_cacheinfo
));
4984 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
4985 struct prefix_info
*pinfo
, u32 portid
, u32 seq
,
4986 int event
, unsigned int flags
)
4988 struct prefixmsg
*pmsg
;
4989 struct nlmsghdr
*nlh
;
4990 struct prefix_cacheinfo ci
;
4992 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*pmsg
), flags
);
4996 pmsg
= nlmsg_data(nlh
);
4997 pmsg
->prefix_family
= AF_INET6
;
4998 pmsg
->prefix_pad1
= 0;
4999 pmsg
->prefix_pad2
= 0;
5000 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
5001 pmsg
->prefix_len
= pinfo
->prefix_len
;
5002 pmsg
->prefix_type
= pinfo
->type
;
5003 pmsg
->prefix_pad3
= 0;
5004 pmsg
->prefix_flags
= 0;
5006 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
5007 if (pinfo
->autoconf
)
5008 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
5010 if (nla_put(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
))
5011 goto nla_put_failure
;
5012 ci
.preferred_time
= ntohl(pinfo
->prefered
);
5013 ci
.valid_time
= ntohl(pinfo
->valid
);
5014 if (nla_put(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
))
5015 goto nla_put_failure
;
5016 nlmsg_end(skb
, nlh
);
5020 nlmsg_cancel(skb
, nlh
);
5024 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
5025 struct prefix_info
*pinfo
)
5027 struct sk_buff
*skb
;
5028 struct net
*net
= dev_net(idev
->dev
);
5031 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
5035 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
5037 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
5038 WARN_ON(err
== -EMSGSIZE
);
5042 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
5046 rtnl_set_sk_err(net
, RTNLGRP_IPV6_PREFIX
, err
);
5049 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
5051 struct net
*net
= dev_net(ifp
->idev
->dev
);
5056 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
5061 * If the address was optimistic
5062 * we inserted the route at the start of
5063 * our DAD process, so we don't need
5066 if (!(ifp
->rt
->rt6i_node
))
5067 ip6_ins_rt(ifp
->rt
);
5068 if (ifp
->idev
->cnf
.forwarding
)
5069 addrconf_join_anycast(ifp
);
5070 if (!ipv6_addr_any(&ifp
->peer_addr
))
5071 addrconf_prefix_route(&ifp
->peer_addr
, 128,
5072 ifp
->idev
->dev
, 0, 0);
5075 if (ifp
->idev
->cnf
.forwarding
)
5076 addrconf_leave_anycast(ifp
);
5077 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
5078 if (!ipv6_addr_any(&ifp
->peer_addr
)) {
5079 struct rt6_info
*rt
;
5081 rt
= addrconf_get_prefix_route(&ifp
->peer_addr
, 128,
5082 ifp
->idev
->dev
, 0, 0);
5083 if (rt
&& ip6_del_rt(rt
))
5086 dst_hold(&ifp
->rt
->dst
);
5088 if (ip6_del_rt(ifp
->rt
))
5089 dst_free(&ifp
->rt
->dst
);
5091 rt_genid_bump_ipv6(net
);
5094 atomic_inc(&net
->ipv6
.dev_addr_genid
);
5097 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
5100 if (likely(ifp
->idev
->dead
== 0))
5101 __ipv6_ifa_notify(event
, ifp
);
5102 rcu_read_unlock_bh();
5105 #ifdef CONFIG_SYSCTL
5108 int addrconf_sysctl_forward(struct ctl_table
*ctl
, int write
,
5109 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
5111 int *valp
= ctl
->data
;
5114 struct ctl_table lctl
;
5118 * ctl->data points to idev->cnf.forwarding, we should
5119 * not modify it until we get the rtnl lock.
5124 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
5127 ret
= addrconf_fixup_forwarding(ctl
, valp
, val
);
5134 int addrconf_sysctl_mtu(struct ctl_table
*ctl
, int write
,
5135 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
5137 struct inet6_dev
*idev
= ctl
->extra1
;
5138 int min_mtu
= IPV6_MIN_MTU
;
5139 struct ctl_table lctl
;
5142 lctl
.extra1
= &min_mtu
;
5143 lctl
.extra2
= idev
? &idev
->dev
->mtu
: NULL
;
5145 return proc_dointvec_minmax(&lctl
, write
, buffer
, lenp
, ppos
);
5148 static void dev_disable_change(struct inet6_dev
*idev
)
5150 struct netdev_notifier_info info
;
5152 if (!idev
|| !idev
->dev
)
5155 netdev_notifier_info_init(&info
, idev
->dev
);
5156 if (idev
->cnf
.disable_ipv6
)
5157 addrconf_notify(NULL
, NETDEV_DOWN
, &info
);
5159 addrconf_notify(NULL
, NETDEV_UP
, &info
);
5162 static void addrconf_disable_change(struct net
*net
, __s32 newf
)
5164 struct net_device
*dev
;
5165 struct inet6_dev
*idev
;
5168 for_each_netdev_rcu(net
, dev
) {
5169 idev
= __in6_dev_get(dev
);
5171 int changed
= (!idev
->cnf
.disable_ipv6
) ^ (!newf
);
5172 idev
->cnf
.disable_ipv6
= newf
;
5174 dev_disable_change(idev
);
5180 static int addrconf_disable_ipv6(struct ctl_table
*table
, int *p
, int newf
)
5185 if (!rtnl_trylock())
5186 return restart_syscall();
5188 net
= (struct net
*)table
->extra2
;
5192 if (p
== &net
->ipv6
.devconf_dflt
->disable_ipv6
) {
5197 if (p
== &net
->ipv6
.devconf_all
->disable_ipv6
) {
5198 net
->ipv6
.devconf_dflt
->disable_ipv6
= newf
;
5199 addrconf_disable_change(net
, newf
);
5200 } else if ((!newf
) ^ (!old
))
5201 dev_disable_change((struct inet6_dev
*)table
->extra1
);
5208 int addrconf_sysctl_disable(struct ctl_table
*ctl
, int write
,
5209 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
5211 int *valp
= ctl
->data
;
5214 struct ctl_table lctl
;
5218 * ctl->data points to idev->cnf.disable_ipv6, we should
5219 * not modify it until we get the rtnl lock.
5224 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
5227 ret
= addrconf_disable_ipv6(ctl
, valp
, val
);
5234 int addrconf_sysctl_proxy_ndp(struct ctl_table
*ctl
, int write
,
5235 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
5237 int *valp
= ctl
->data
;
5242 ret
= proc_dointvec(ctl
, write
, buffer
, lenp
, ppos
);
5245 if (write
&& old
!= new) {
5246 struct net
*net
= ctl
->extra2
;
5248 if (!rtnl_trylock())
5249 return restart_syscall();
5251 if (valp
== &net
->ipv6
.devconf_dflt
->proxy_ndp
)
5252 inet6_netconf_notify_devconf(net
, NETCONFA_PROXY_NEIGH
,
5253 NETCONFA_IFINDEX_DEFAULT
,
5254 net
->ipv6
.devconf_dflt
);
5255 else if (valp
== &net
->ipv6
.devconf_all
->proxy_ndp
)
5256 inet6_netconf_notify_devconf(net
, NETCONFA_PROXY_NEIGH
,
5257 NETCONFA_IFINDEX_ALL
,
5258 net
->ipv6
.devconf_all
);
5260 struct inet6_dev
*idev
= ctl
->extra1
;
5262 inet6_netconf_notify_devconf(net
, NETCONFA_PROXY_NEIGH
,
5272 static int addrconf_sysctl_stable_secret(struct ctl_table
*ctl
, int write
,
5273 void __user
*buffer
, size_t *lenp
,
5277 struct in6_addr addr
;
5278 char str
[IPV6_MAX_STRLEN
];
5279 struct ctl_table lctl
= *ctl
;
5280 struct net
*net
= ctl
->extra2
;
5281 struct ipv6_stable_secret
*secret
= ctl
->data
;
5283 if (&net
->ipv6
.devconf_all
->stable_secret
== ctl
->data
)
5286 lctl
.maxlen
= IPV6_MAX_STRLEN
;
5289 if (!rtnl_trylock())
5290 return restart_syscall();
5292 if (!write
&& !secret
->initialized
) {
5298 err
= snprintf(str
, sizeof(str
), "%pI6",
5300 if (err
>= sizeof(str
)) {
5306 err
= proc_dostring(&lctl
, write
, buffer
, lenp
, ppos
);
5310 if (in6_pton(str
, -1, addr
.in6_u
.u6_addr8
, -1, NULL
) != 1) {
5315 secret
->initialized
= true;
5316 secret
->secret
= addr
;
5318 if (&net
->ipv6
.devconf_dflt
->stable_secret
== ctl
->data
) {
5319 struct net_device
*dev
;
5321 for_each_netdev(net
, dev
) {
5322 struct inet6_dev
*idev
= __in6_dev_get(dev
);
5325 idev
->addr_gen_mode
=
5326 IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
5330 struct inet6_dev
*idev
= ctl
->extra1
;
5332 idev
->addr_gen_mode
= IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
5341 static struct addrconf_sysctl_table
5343 struct ctl_table_header
*sysctl_header
;
5344 struct ctl_table addrconf_vars
[DEVCONF_MAX
+1];
5345 } addrconf_sysctl __read_mostly
= {
5346 .sysctl_header
= NULL
,
5349 .procname
= "forwarding",
5350 .data
= &ipv6_devconf
.forwarding
,
5351 .maxlen
= sizeof(int),
5353 .proc_handler
= addrconf_sysctl_forward
,
5356 .procname
= "hop_limit",
5357 .data
= &ipv6_devconf
.hop_limit
,
5358 .maxlen
= sizeof(int),
5360 .proc_handler
= proc_dointvec
,
5364 .data
= &ipv6_devconf
.mtu6
,
5365 .maxlen
= sizeof(int),
5367 .proc_handler
= addrconf_sysctl_mtu
,
5370 .procname
= "accept_ra",
5371 .data
= &ipv6_devconf
.accept_ra
,
5372 .maxlen
= sizeof(int),
5374 .proc_handler
= proc_dointvec
,
5377 .procname
= "accept_redirects",
5378 .data
= &ipv6_devconf
.accept_redirects
,
5379 .maxlen
= sizeof(int),
5381 .proc_handler
= proc_dointvec
,
5384 .procname
= "autoconf",
5385 .data
= &ipv6_devconf
.autoconf
,
5386 .maxlen
= sizeof(int),
5388 .proc_handler
= proc_dointvec
,
5391 .procname
= "dad_transmits",
5392 .data
= &ipv6_devconf
.dad_transmits
,
5393 .maxlen
= sizeof(int),
5395 .proc_handler
= proc_dointvec
,
5398 .procname
= "router_solicitations",
5399 .data
= &ipv6_devconf
.rtr_solicits
,
5400 .maxlen
= sizeof(int),
5402 .proc_handler
= proc_dointvec
,
5405 .procname
= "router_solicitation_interval",
5406 .data
= &ipv6_devconf
.rtr_solicit_interval
,
5407 .maxlen
= sizeof(int),
5409 .proc_handler
= proc_dointvec_jiffies
,
5412 .procname
= "router_solicitation_delay",
5413 .data
= &ipv6_devconf
.rtr_solicit_delay
,
5414 .maxlen
= sizeof(int),
5416 .proc_handler
= proc_dointvec_jiffies
,
5419 .procname
= "force_mld_version",
5420 .data
= &ipv6_devconf
.force_mld_version
,
5421 .maxlen
= sizeof(int),
5423 .proc_handler
= proc_dointvec
,
5426 .procname
= "mldv1_unsolicited_report_interval",
5428 &ipv6_devconf
.mldv1_unsolicited_report_interval
,
5429 .maxlen
= sizeof(int),
5431 .proc_handler
= proc_dointvec_ms_jiffies
,
5434 .procname
= "mldv2_unsolicited_report_interval",
5436 &ipv6_devconf
.mldv2_unsolicited_report_interval
,
5437 .maxlen
= sizeof(int),
5439 .proc_handler
= proc_dointvec_ms_jiffies
,
5442 .procname
= "use_tempaddr",
5443 .data
= &ipv6_devconf
.use_tempaddr
,
5444 .maxlen
= sizeof(int),
5446 .proc_handler
= proc_dointvec
,
5449 .procname
= "temp_valid_lft",
5450 .data
= &ipv6_devconf
.temp_valid_lft
,
5451 .maxlen
= sizeof(int),
5453 .proc_handler
= proc_dointvec
,
5456 .procname
= "temp_prefered_lft",
5457 .data
= &ipv6_devconf
.temp_prefered_lft
,
5458 .maxlen
= sizeof(int),
5460 .proc_handler
= proc_dointvec
,
5463 .procname
= "regen_max_retry",
5464 .data
= &ipv6_devconf
.regen_max_retry
,
5465 .maxlen
= sizeof(int),
5467 .proc_handler
= proc_dointvec
,
5470 .procname
= "max_desync_factor",
5471 .data
= &ipv6_devconf
.max_desync_factor
,
5472 .maxlen
= sizeof(int),
5474 .proc_handler
= proc_dointvec
,
5477 .procname
= "max_addresses",
5478 .data
= &ipv6_devconf
.max_addresses
,
5479 .maxlen
= sizeof(int),
5481 .proc_handler
= proc_dointvec
,
5484 .procname
= "accept_ra_defrtr",
5485 .data
= &ipv6_devconf
.accept_ra_defrtr
,
5486 .maxlen
= sizeof(int),
5488 .proc_handler
= proc_dointvec
,
5491 .procname
= "accept_ra_min_hop_limit",
5492 .data
= &ipv6_devconf
.accept_ra_min_hop_limit
,
5493 .maxlen
= sizeof(int),
5495 .proc_handler
= proc_dointvec
,
5498 .procname
= "accept_ra_pinfo",
5499 .data
= &ipv6_devconf
.accept_ra_pinfo
,
5500 .maxlen
= sizeof(int),
5502 .proc_handler
= proc_dointvec
,
5504 #ifdef CONFIG_IPV6_ROUTER_PREF
5506 .procname
= "accept_ra_rtr_pref",
5507 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
5508 .maxlen
= sizeof(int),
5510 .proc_handler
= proc_dointvec
,
5513 .procname
= "router_probe_interval",
5514 .data
= &ipv6_devconf
.rtr_probe_interval
,
5515 .maxlen
= sizeof(int),
5517 .proc_handler
= proc_dointvec_jiffies
,
5519 #ifdef CONFIG_IPV6_ROUTE_INFO
5521 .procname
= "accept_ra_rt_info_max_plen",
5522 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
5523 .maxlen
= sizeof(int),
5525 .proc_handler
= proc_dointvec
,
5530 .procname
= "proxy_ndp",
5531 .data
= &ipv6_devconf
.proxy_ndp
,
5532 .maxlen
= sizeof(int),
5534 .proc_handler
= addrconf_sysctl_proxy_ndp
,
5537 .procname
= "accept_source_route",
5538 .data
= &ipv6_devconf
.accept_source_route
,
5539 .maxlen
= sizeof(int),
5541 .proc_handler
= proc_dointvec
,
5543 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
5545 .procname
= "optimistic_dad",
5546 .data
= &ipv6_devconf
.optimistic_dad
,
5547 .maxlen
= sizeof(int),
5549 .proc_handler
= proc_dointvec
,
5553 .procname
= "use_optimistic",
5554 .data
= &ipv6_devconf
.use_optimistic
,
5555 .maxlen
= sizeof(int),
5557 .proc_handler
= proc_dointvec
,
5561 #ifdef CONFIG_IPV6_MROUTE
5563 .procname
= "mc_forwarding",
5564 .data
= &ipv6_devconf
.mc_forwarding
,
5565 .maxlen
= sizeof(int),
5567 .proc_handler
= proc_dointvec
,
5571 .procname
= "disable_ipv6",
5572 .data
= &ipv6_devconf
.disable_ipv6
,
5573 .maxlen
= sizeof(int),
5575 .proc_handler
= addrconf_sysctl_disable
,
5578 .procname
= "accept_dad",
5579 .data
= &ipv6_devconf
.accept_dad
,
5580 .maxlen
= sizeof(int),
5582 .proc_handler
= proc_dointvec
,
5585 .procname
= "force_tllao",
5586 .data
= &ipv6_devconf
.force_tllao
,
5587 .maxlen
= sizeof(int),
5589 .proc_handler
= proc_dointvec
5592 .procname
= "ndisc_notify",
5593 .data
= &ipv6_devconf
.ndisc_notify
,
5594 .maxlen
= sizeof(int),
5596 .proc_handler
= proc_dointvec
5599 .procname
= "suppress_frag_ndisc",
5600 .data
= &ipv6_devconf
.suppress_frag_ndisc
,
5601 .maxlen
= sizeof(int),
5603 .proc_handler
= proc_dointvec
5606 .procname
= "accept_ra_from_local",
5607 .data
= &ipv6_devconf
.accept_ra_from_local
,
5608 .maxlen
= sizeof(int),
5610 .proc_handler
= proc_dointvec
,
5613 .procname
= "accept_ra_mtu",
5614 .data
= &ipv6_devconf
.accept_ra_mtu
,
5615 .maxlen
= sizeof(int),
5617 .proc_handler
= proc_dointvec
,
5620 .procname
= "stable_secret",
5621 .data
= &ipv6_devconf
.stable_secret
,
5622 .maxlen
= IPV6_MAX_STRLEN
,
5624 .proc_handler
= addrconf_sysctl_stable_secret
,
5627 .procname
= "use_oif_addrs_only",
5628 .data
= &ipv6_devconf
.use_oif_addrs_only
,
5629 .maxlen
= sizeof(int),
5631 .proc_handler
= proc_dointvec
,
5640 static int __addrconf_sysctl_register(struct net
*net
, char *dev_name
,
5641 struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
5644 struct addrconf_sysctl_table
*t
;
5645 char path
[sizeof("net/ipv6/conf/") + IFNAMSIZ
];
5647 t
= kmemdup(&addrconf_sysctl
, sizeof(*t
), GFP_KERNEL
);
5651 for (i
= 0; t
->addrconf_vars
[i
].data
; i
++) {
5652 t
->addrconf_vars
[i
].data
+= (char *)p
- (char *)&ipv6_devconf
;
5653 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
5654 t
->addrconf_vars
[i
].extra2
= net
;
5657 snprintf(path
, sizeof(path
), "net/ipv6/conf/%s", dev_name
);
5659 t
->sysctl_header
= register_net_sysctl(net
, path
, t
->addrconf_vars
);
5660 if (!t
->sysctl_header
)
5672 static void __addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
5674 struct addrconf_sysctl_table
*t
;
5681 unregister_net_sysctl_table(t
->sysctl_header
);
5685 static int addrconf_sysctl_register(struct inet6_dev
*idev
)
5689 if (!sysctl_dev_name_is_allowed(idev
->dev
->name
))
5692 err
= neigh_sysctl_register(idev
->dev
, idev
->nd_parms
,
5693 &ndisc_ifinfo_sysctl_change
);
5696 err
= __addrconf_sysctl_register(dev_net(idev
->dev
), idev
->dev
->name
,
5699 neigh_sysctl_unregister(idev
->nd_parms
);
5704 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
5706 __addrconf_sysctl_unregister(&idev
->cnf
);
5707 neigh_sysctl_unregister(idev
->nd_parms
);
5713 static int __net_init
addrconf_init_net(struct net
*net
)
5716 struct ipv6_devconf
*all
, *dflt
;
5718 all
= kmemdup(&ipv6_devconf
, sizeof(ipv6_devconf
), GFP_KERNEL
);
5722 dflt
= kmemdup(&ipv6_devconf_dflt
, sizeof(ipv6_devconf_dflt
), GFP_KERNEL
);
5724 goto err_alloc_dflt
;
5726 /* these will be inherited by all namespaces */
5727 dflt
->autoconf
= ipv6_defaults
.autoconf
;
5728 dflt
->disable_ipv6
= ipv6_defaults
.disable_ipv6
;
5730 dflt
->stable_secret
.initialized
= false;
5731 all
->stable_secret
.initialized
= false;
5733 net
->ipv6
.devconf_all
= all
;
5734 net
->ipv6
.devconf_dflt
= dflt
;
5736 #ifdef CONFIG_SYSCTL
5737 err
= __addrconf_sysctl_register(net
, "all", NULL
, all
);
5741 err
= __addrconf_sysctl_register(net
, "default", NULL
, dflt
);
5747 #ifdef CONFIG_SYSCTL
5749 __addrconf_sysctl_unregister(all
);
5759 static void __net_exit
addrconf_exit_net(struct net
*net
)
5761 #ifdef CONFIG_SYSCTL
5762 __addrconf_sysctl_unregister(net
->ipv6
.devconf_dflt
);
5763 __addrconf_sysctl_unregister(net
->ipv6
.devconf_all
);
5765 kfree(net
->ipv6
.devconf_dflt
);
5766 kfree(net
->ipv6
.devconf_all
);
5769 static struct pernet_operations addrconf_ops
= {
5770 .init
= addrconf_init_net
,
5771 .exit
= addrconf_exit_net
,
5774 static struct rtnl_af_ops inet6_ops __read_mostly
= {
5776 .fill_link_af
= inet6_fill_link_af
,
5777 .get_link_af_size
= inet6_get_link_af_size
,
5778 .validate_link_af
= inet6_validate_link_af
,
5779 .set_link_af
= inet6_set_link_af
,
5783 * Init / cleanup code
5786 int __init
addrconf_init(void)
5788 struct inet6_dev
*idev
;
5791 err
= ipv6_addr_label_init();
5793 pr_crit("%s: cannot initialize default policy table: %d\n",
5798 err
= register_pernet_subsys(&addrconf_ops
);
5802 addrconf_wq
= create_workqueue("ipv6_addrconf");
5808 /* The addrconf netdev notifier requires that loopback_dev
5809 * has it's ipv6 private information allocated and setup
5810 * before it can bring up and give link-local addresses
5811 * to other devices which are up.
5813 * Unfortunately, loopback_dev is not necessarily the first
5814 * entry in the global dev_base list of net devices. In fact,
5815 * it is likely to be the very last entry on that list.
5816 * So this causes the notifier registry below to try and
5817 * give link-local addresses to all devices besides loopback_dev
5818 * first, then loopback_dev, which cases all the non-loopback_dev
5819 * devices to fail to get a link-local address.
5821 * So, as a temporary fix, allocate the ipv6 structure for
5822 * loopback_dev first by hand.
5823 * Longer term, all of the dependencies ipv6 has upon the loopback
5824 * device and it being up should be removed.
5827 idev
= ipv6_add_dev(init_net
.loopback_dev
);
5830 err
= PTR_ERR(idev
);
5834 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
5835 INIT_HLIST_HEAD(&inet6_addr_lst
[i
]);
5837 register_netdevice_notifier(&ipv6_dev_notf
);
5841 rtnl_af_register(&inet6_ops
);
5843 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
,
5848 /* Only the first call to __rtnl_register can fail */
5849 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
, NULL
);
5850 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
, NULL
);
5851 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
,
5852 inet6_dump_ifaddr
, NULL
);
5853 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
,
5854 inet6_dump_ifmcaddr
, NULL
);
5855 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
,
5856 inet6_dump_ifacaddr
, NULL
);
5857 __rtnl_register(PF_INET6
, RTM_GETNETCONF
, inet6_netconf_get_devconf
,
5858 inet6_netconf_dump_devconf
, NULL
);
5860 ipv6_addr_label_rtnl_register();
5864 rtnl_af_unregister(&inet6_ops
);
5865 unregister_netdevice_notifier(&ipv6_dev_notf
);
5867 destroy_workqueue(addrconf_wq
);
5869 unregister_pernet_subsys(&addrconf_ops
);
5871 ipv6_addr_label_cleanup();
5876 void addrconf_cleanup(void)
5878 struct net_device
*dev
;
5881 unregister_netdevice_notifier(&ipv6_dev_notf
);
5882 unregister_pernet_subsys(&addrconf_ops
);
5883 ipv6_addr_label_cleanup();
5887 __rtnl_af_unregister(&inet6_ops
);
5889 /* clean dev list */
5890 for_each_netdev(&init_net
, dev
) {
5891 if (__in6_dev_get(dev
) == NULL
)
5893 addrconf_ifdown(dev
, 1);
5895 addrconf_ifdown(init_net
.loopback_dev
, 2);
5900 spin_lock_bh(&addrconf_hash_lock
);
5901 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
5902 WARN_ON(!hlist_empty(&inet6_addr_lst
[i
]));
5903 spin_unlock_bh(&addrconf_hash_lock
);
5904 cancel_delayed_work(&addr_chk_work
);
5907 destroy_workqueue(addrconf_wq
);