xref: /openbmc/linux/net/ipv6/addrconf.c (revision 853dc2e03ddd0c49885ed55c48755d2b1073122a)
11da177e4SLinus Torvalds /*
21da177e4SLinus Torvalds  *	IPv6 Address [auto]configuration
31da177e4SLinus Torvalds  *	Linux INET6 implementation
41da177e4SLinus Torvalds  *
51da177e4SLinus Torvalds  *	Authors:
61da177e4SLinus Torvalds  *	Pedro Roque		<roque@di.fc.ul.pt>
71da177e4SLinus Torvalds  *	Alexey Kuznetsov	<kuznet@ms2.inr.ac.ru>
81da177e4SLinus Torvalds  *
91da177e4SLinus Torvalds  *	This program is free software; you can redistribute it and/or
101da177e4SLinus Torvalds  *      modify it under the terms of the GNU General Public License
111da177e4SLinus Torvalds  *      as published by the Free Software Foundation; either version
121da177e4SLinus Torvalds  *      2 of the License, or (at your option) any later version.
131da177e4SLinus Torvalds  */
141da177e4SLinus Torvalds 
151da177e4SLinus Torvalds /*
161da177e4SLinus Torvalds  *	Changes:
171da177e4SLinus Torvalds  *
181da177e4SLinus Torvalds  *	Janos Farkas			:	delete timer on ifdown
191da177e4SLinus Torvalds  *	<chexum@bankinf.banki.hu>
201da177e4SLinus Torvalds  *	Andi Kleen			:	kill double kfree on module
211da177e4SLinus Torvalds  *						unload.
221da177e4SLinus Torvalds  *	Maciej W. Rozycki		:	FDDI support
231da177e4SLinus Torvalds  *	sekiya@USAGI			:	Don't send too many RS
241da177e4SLinus Torvalds  *						packets.
251da177e4SLinus Torvalds  *	yoshfuji@USAGI			:       Fixed interval between DAD
261da177e4SLinus Torvalds  *						packets.
271da177e4SLinus Torvalds  *	YOSHIFUJI Hideaki @USAGI	:	improved accuracy of
281da177e4SLinus Torvalds  *						address validation timer.
291da177e4SLinus Torvalds  *	YOSHIFUJI Hideaki @USAGI	:	Privacy Extensions (RFC3041)
301da177e4SLinus Torvalds  *						support.
311da177e4SLinus Torvalds  *	Yuji SEKIYA @USAGI		:	Don't assign a same IPv6
321da177e4SLinus Torvalds  *						address on a same interface.
331da177e4SLinus Torvalds  *	YOSHIFUJI Hideaki @USAGI	:	ARCnet support
341da177e4SLinus Torvalds  *	YOSHIFUJI Hideaki @USAGI	:	convert /proc/net/if_inet6 to
351da177e4SLinus Torvalds  *						seq_file.
36b1cacb68SYOSHIFUJI Hideaki  *	YOSHIFUJI Hideaki @USAGI	:	improved source address
37b1cacb68SYOSHIFUJI Hideaki  *						selection; consider scope,
38b1cacb68SYOSHIFUJI Hideaki  *						status etc.
391da177e4SLinus Torvalds  */
401da177e4SLinus Torvalds 
411da177e4SLinus Torvalds #include <linux/errno.h>
421da177e4SLinus Torvalds #include <linux/types.h>
43a0bffffcSIlpo Järvinen #include <linux/kernel.h>
441da177e4SLinus Torvalds #include <linux/socket.h>
451da177e4SLinus Torvalds #include <linux/sockios.h>
461da177e4SLinus Torvalds #include <linux/net.h>
471da177e4SLinus Torvalds #include <linux/in6.h>
481da177e4SLinus Torvalds #include <linux/netdevice.h>
491823730fSThomas Graf #include <linux/if_addr.h>
501da177e4SLinus Torvalds #include <linux/if_arp.h>
511da177e4SLinus Torvalds #include <linux/if_arcnet.h>
521da177e4SLinus Torvalds #include <linux/if_infiniband.h>
531da177e4SLinus Torvalds #include <linux/route.h>
541da177e4SLinus Torvalds #include <linux/inetdevice.h>
551da177e4SLinus Torvalds #include <linux/init.h>
565a0e3ad6STejun Heo #include <linux/slab.h>
571da177e4SLinus Torvalds #ifdef CONFIG_SYSCTL
581da177e4SLinus Torvalds #include <linux/sysctl.h>
591da177e4SLinus Torvalds #endif
604fc268d2SRandy Dunlap #include <linux/capability.h>
611da177e4SLinus Torvalds #include <linux/delay.h>
621da177e4SLinus Torvalds #include <linux/notifier.h>
63543537bdSPaulo Marques #include <linux/string.h>
641da177e4SLinus Torvalds 
65457c4cbcSEric W. Biederman #include <net/net_namespace.h>
661da177e4SLinus Torvalds #include <net/sock.h>
671da177e4SLinus Torvalds #include <net/snmp.h>
681da177e4SLinus Torvalds 
691da177e4SLinus Torvalds #include <net/ipv6.h>
701da177e4SLinus Torvalds #include <net/protocol.h>
711da177e4SLinus Torvalds #include <net/ndisc.h>
721da177e4SLinus Torvalds #include <net/ip6_route.h>
731da177e4SLinus Torvalds #include <net/addrconf.h>
741da177e4SLinus Torvalds #include <net/tcp.h>
751da177e4SLinus Torvalds #include <net/ip.h>
765d620266SThomas Graf #include <net/netlink.h>
77f24e3d65SMitsuru Chinen #include <net/pkt_sched.h>
781da177e4SLinus Torvalds #include <linux/if_tunnel.h>
791da177e4SLinus Torvalds #include <linux/rtnetlink.h>
801da177e4SLinus Torvalds 
811da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY
821da177e4SLinus Torvalds #include <linux/random.h>
831da177e4SLinus Torvalds #endif
841da177e4SLinus Torvalds 
85e21e8467SStephen Hemminger #include <linux/uaccess.h>
867f7d9a6bSHerbert Xu #include <asm/unaligned.h>
871da177e4SLinus Torvalds 
881da177e4SLinus Torvalds #include <linux/proc_fs.h>
891da177e4SLinus Torvalds #include <linux/seq_file.h>
901da177e4SLinus Torvalds 
911da177e4SLinus Torvalds /* Set to 3 to get tracing... */
921da177e4SLinus Torvalds #define ACONF_DEBUG 2
931da177e4SLinus Torvalds 
941da177e4SLinus Torvalds #if ACONF_DEBUG >= 3
951da177e4SLinus Torvalds #define ADBG(x) printk x
961da177e4SLinus Torvalds #else
971da177e4SLinus Torvalds #define ADBG(x)
981da177e4SLinus Torvalds #endif
991da177e4SLinus Torvalds 
1001da177e4SLinus Torvalds #define	INFINITY_LIFE_TIME	0xFFFFFFFF
1011da177e4SLinus Torvalds #define TIME_DELTA(a, b) ((unsigned long)((long)(a) - (long)(b)))
1021da177e4SLinus Torvalds 
103b2db7564SYOSHIFUJI Hideaki #define ADDRCONF_TIMER_FUZZ_MINUS	(HZ > 50 ? HZ/50 : 1)
104b2db7564SYOSHIFUJI Hideaki #define ADDRCONF_TIMER_FUZZ		(HZ / 4)
105b2db7564SYOSHIFUJI Hideaki #define ADDRCONF_TIMER_FUZZ_MAX		(HZ)
106b2db7564SYOSHIFUJI Hideaki 
1071da177e4SLinus Torvalds #ifdef CONFIG_SYSCTL
108f52295a9SPavel Emelyanov static void addrconf_sysctl_register(struct inet6_dev *idev);
109408c4768SPavel Emelyanov static void addrconf_sysctl_unregister(struct inet6_dev *idev);
110408c4768SPavel Emelyanov #else
111408c4768SPavel Emelyanov static inline void addrconf_sysctl_register(struct inet6_dev *idev)
112408c4768SPavel Emelyanov {
113408c4768SPavel Emelyanov }
114408c4768SPavel Emelyanov 
115408c4768SPavel Emelyanov static inline void addrconf_sysctl_unregister(struct inet6_dev *idev)
116408c4768SPavel Emelyanov {
117408c4768SPavel Emelyanov }
1181da177e4SLinus Torvalds #endif
1191da177e4SLinus Torvalds 
1201da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY
1211da177e4SLinus Torvalds static int __ipv6_regen_rndid(struct inet6_dev *idev);
1221da177e4SLinus Torvalds static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
1231da177e4SLinus Torvalds static void ipv6_regen_rndid(unsigned long data);
1241da177e4SLinus Torvalds #endif
1251da177e4SLinus Torvalds 
1261b34be74SYOSHIFUJI Hideaki static int ipv6_generate_eui64(u8 *eui, struct net_device *dev);
1271da177e4SLinus Torvalds static int ipv6_count_addresses(struct inet6_dev *idev);
1281da177e4SLinus Torvalds 
1291da177e4SLinus Torvalds /*
1301da177e4SLinus Torvalds  *	Configured unicast address hash table
1311da177e4SLinus Torvalds  */
132c2e21293Sstephen hemminger static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE];
1335c578aedSstephen hemminger static DEFINE_SPINLOCK(addrconf_hash_lock);
1341da177e4SLinus Torvalds 
1351da177e4SLinus Torvalds static void addrconf_verify(unsigned long);
1361da177e4SLinus Torvalds 
1378d06afabSIngo Molnar static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
1381da177e4SLinus Torvalds static DEFINE_SPINLOCK(addrconf_verify_lock);
1391da177e4SLinus Torvalds 
1401da177e4SLinus Torvalds static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
1411da177e4SLinus Torvalds static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
1421da177e4SLinus Torvalds 
14393d9b7d7SJiri Pirko static void addrconf_type_change(struct net_device *dev,
14475c78500SMoni Shoua 				 unsigned long event);
1451da177e4SLinus Torvalds static int addrconf_ifdown(struct net_device *dev, int how);
1461da177e4SLinus Torvalds 
147e431b8c0SJamal Hadi Salim static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
1481da177e4SLinus Torvalds static void addrconf_dad_timer(unsigned long data);
1491da177e4SLinus Torvalds static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
150c5e33bddSYOSHIFUJI Hideaki static void addrconf_dad_run(struct inet6_dev *idev);
1511da177e4SLinus Torvalds static void addrconf_rs_timer(unsigned long data);
1521da177e4SLinus Torvalds static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
1531da177e4SLinus Torvalds static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
1541da177e4SLinus Torvalds 
1551da177e4SLinus Torvalds static void inet6_prefix_notify(int event, struct inet6_dev *idev,
1561da177e4SLinus Torvalds 				struct prefix_info *pinfo);
1573e81c6daSDavid S. Miller static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
15806bfe655SDaniel Lezcano 			       struct net_device *dev);
1591da177e4SLinus Torvalds 
160e041c683SAlan Stern static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
1611da177e4SLinus Torvalds 
162888c848eSAdrian Bunk static struct ipv6_devconf ipv6_devconf __read_mostly = {
1631da177e4SLinus Torvalds 	.forwarding		= 0,
1641da177e4SLinus Torvalds 	.hop_limit		= IPV6_DEFAULT_HOPLIMIT,
1651da177e4SLinus Torvalds 	.mtu6			= IPV6_MIN_MTU,
1661da177e4SLinus Torvalds 	.accept_ra		= 1,
1671da177e4SLinus Torvalds 	.accept_redirects	= 1,
1681da177e4SLinus Torvalds 	.autoconf		= 1,
1691da177e4SLinus Torvalds 	.force_mld_version	= 0,
1701da177e4SLinus Torvalds 	.dad_transmits		= 1,
1711da177e4SLinus Torvalds 	.rtr_solicits		= MAX_RTR_SOLICITATIONS,
1721da177e4SLinus Torvalds 	.rtr_solicit_interval	= RTR_SOLICITATION_INTERVAL,
1731da177e4SLinus Torvalds 	.rtr_solicit_delay	= MAX_RTR_SOLICITATION_DELAY,
1741da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY
1751da177e4SLinus Torvalds 	.use_tempaddr 		= 0,
1761da177e4SLinus Torvalds 	.temp_valid_lft		= TEMP_VALID_LIFETIME,
1771da177e4SLinus Torvalds 	.temp_prefered_lft	= TEMP_PREFERRED_LIFETIME,
1781da177e4SLinus Torvalds 	.regen_max_retry	= REGEN_MAX_RETRY,
1791da177e4SLinus Torvalds 	.max_desync_factor	= MAX_DESYNC_FACTOR,
1801da177e4SLinus Torvalds #endif
1811da177e4SLinus Torvalds 	.max_addresses		= IPV6_MAX_ADDRESSES,
18265f5c7c1SYOSHIFUJI Hideaki 	.accept_ra_defrtr	= 1,
183c4fd30ebSYOSHIFUJI Hideaki 	.accept_ra_pinfo	= 1,
184930d6ff2SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_ROUTER_PREF
185930d6ff2SYOSHIFUJI Hideaki 	.accept_ra_rtr_pref	= 1,
18652e16356SYOSHIFUJI Hideaki 	.rtr_probe_interval	= 60 * HZ,
18709c884d4SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_ROUTE_INFO
18809c884d4SYOSHIFUJI Hideaki 	.accept_ra_rt_info_max_plen = 0,
18909c884d4SYOSHIFUJI Hideaki #endif
190930d6ff2SYOSHIFUJI Hideaki #endif
191fbea49e1SYOSHIFUJI Hideaki 	.proxy_ndp		= 0,
1920bcbc926SYOSHIFUJI Hideaki 	.accept_source_route	= 0,	/* we do not accept RH0 by default. */
193778d80beSYOSHIFUJI Hideaki 	.disable_ipv6		= 0,
1941b34be74SYOSHIFUJI Hideaki 	.accept_dad		= 1,
1951da177e4SLinus Torvalds };
1961da177e4SLinus Torvalds 
197ab32ea5dSBrian Haley static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
1981da177e4SLinus Torvalds 	.forwarding		= 0,
1991da177e4SLinus Torvalds 	.hop_limit		= IPV6_DEFAULT_HOPLIMIT,
2001da177e4SLinus Torvalds 	.mtu6			= IPV6_MIN_MTU,
2011da177e4SLinus Torvalds 	.accept_ra		= 1,
2021da177e4SLinus Torvalds 	.accept_redirects	= 1,
2031da177e4SLinus Torvalds 	.autoconf		= 1,
2041da177e4SLinus Torvalds 	.dad_transmits		= 1,
2051da177e4SLinus Torvalds 	.rtr_solicits		= MAX_RTR_SOLICITATIONS,
2061da177e4SLinus Torvalds 	.rtr_solicit_interval	= RTR_SOLICITATION_INTERVAL,
2071da177e4SLinus Torvalds 	.rtr_solicit_delay	= MAX_RTR_SOLICITATION_DELAY,
2081da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY
2091da177e4SLinus Torvalds 	.use_tempaddr		= 0,
2101da177e4SLinus Torvalds 	.temp_valid_lft		= TEMP_VALID_LIFETIME,
2111da177e4SLinus Torvalds 	.temp_prefered_lft	= TEMP_PREFERRED_LIFETIME,
2121da177e4SLinus Torvalds 	.regen_max_retry	= REGEN_MAX_RETRY,
2131da177e4SLinus Torvalds 	.max_desync_factor	= MAX_DESYNC_FACTOR,
2141da177e4SLinus Torvalds #endif
2151da177e4SLinus Torvalds 	.max_addresses		= IPV6_MAX_ADDRESSES,
21665f5c7c1SYOSHIFUJI Hideaki 	.accept_ra_defrtr	= 1,
217c4fd30ebSYOSHIFUJI Hideaki 	.accept_ra_pinfo	= 1,
218930d6ff2SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_ROUTER_PREF
219930d6ff2SYOSHIFUJI Hideaki 	.accept_ra_rtr_pref	= 1,
22052e16356SYOSHIFUJI Hideaki 	.rtr_probe_interval	= 60 * HZ,
22109c884d4SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_ROUTE_INFO
22209c884d4SYOSHIFUJI Hideaki 	.accept_ra_rt_info_max_plen = 0,
22309c884d4SYOSHIFUJI Hideaki #endif
224930d6ff2SYOSHIFUJI Hideaki #endif
225fbea49e1SYOSHIFUJI Hideaki 	.proxy_ndp		= 0,
2260bcbc926SYOSHIFUJI Hideaki 	.accept_source_route	= 0,	/* we do not accept RH0 by default. */
227778d80beSYOSHIFUJI Hideaki 	.disable_ipv6		= 0,
2281b34be74SYOSHIFUJI Hideaki 	.accept_dad		= 1,
2291da177e4SLinus Torvalds };
2301da177e4SLinus Torvalds 
2311da177e4SLinus Torvalds /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
2321da177e4SLinus Torvalds const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
2331da177e4SLinus Torvalds const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
234f3ee4010SYOSHIFUJI Hideaki const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT;
235f3ee4010SYOSHIFUJI Hideaki const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
2361da177e4SLinus Torvalds 
237f24e3d65SMitsuru Chinen /* Check if a valid qdisc is available */
23805297949SDavid S. Miller static inline bool addrconf_qdisc_ok(const struct net_device *dev)
239f24e3d65SMitsuru Chinen {
24005297949SDavid S. Miller 	return !qdisc_tx_is_noop(dev);
241f24e3d65SMitsuru Chinen }
242f24e3d65SMitsuru Chinen 
2432b5ead46SYOSHIFUJI Hideaki /* Check if a route is valid prefix route */
2442b5ead46SYOSHIFUJI Hideaki static inline int addrconf_is_prefix_route(const struct rt6_info *rt)
2452b5ead46SYOSHIFUJI Hideaki {
246a02cec21SEric Dumazet 	return (rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0;
2472b5ead46SYOSHIFUJI Hideaki }
2482b5ead46SYOSHIFUJI Hideaki 
2491da177e4SLinus Torvalds static void addrconf_del_timer(struct inet6_ifaddr *ifp)
2501da177e4SLinus Torvalds {
2511da177e4SLinus Torvalds 	if (del_timer(&ifp->timer))
2521da177e4SLinus Torvalds 		__in6_ifa_put(ifp);
2531da177e4SLinus Torvalds }
2541da177e4SLinus Torvalds 
255e21e8467SStephen Hemminger enum addrconf_timer_t {
2561da177e4SLinus Torvalds 	AC_NONE,
2571da177e4SLinus Torvalds 	AC_DAD,
2581da177e4SLinus Torvalds 	AC_RS,
2591da177e4SLinus Torvalds };
2601da177e4SLinus Torvalds 
2611da177e4SLinus Torvalds static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
2621da177e4SLinus Torvalds 			       enum addrconf_timer_t what,
2631da177e4SLinus Torvalds 			       unsigned long when)
2641da177e4SLinus Torvalds {
2651da177e4SLinus Torvalds 	if (!del_timer(&ifp->timer))
2661da177e4SLinus Torvalds 		in6_ifa_hold(ifp);
2671da177e4SLinus Torvalds 
2681da177e4SLinus Torvalds 	switch (what) {
2691da177e4SLinus Torvalds 	case AC_DAD:
2701da177e4SLinus Torvalds 		ifp->timer.function = addrconf_dad_timer;
2711da177e4SLinus Torvalds 		break;
2721da177e4SLinus Torvalds 	case AC_RS:
2731da177e4SLinus Torvalds 		ifp->timer.function = addrconf_rs_timer;
2741da177e4SLinus Torvalds 		break;
275e21e8467SStephen Hemminger 	default:
276e21e8467SStephen Hemminger 		break;
2771da177e4SLinus Torvalds 	}
2781da177e4SLinus Torvalds 	ifp->timer.expires = jiffies + when;
2791da177e4SLinus Torvalds 	add_timer(&ifp->timer);
2801da177e4SLinus Torvalds }
2811da177e4SLinus Torvalds 
2827f7d9a6bSHerbert Xu static int snmp6_alloc_dev(struct inet6_dev *idev)
2837f7d9a6bSHerbert Xu {
2847d720c3eSTejun Heo 	if (snmp_mib_init((void __percpu **)idev->stats.ipv6,
2851823e4c8SEric Dumazet 			  sizeof(struct ipstats_mib),
2861823e4c8SEric Dumazet 			  __alignof__(struct ipstats_mib)) < 0)
2877f7d9a6bSHerbert Xu 		goto err_ip;
2887d720c3eSTejun Heo 	if (snmp_mib_init((void __percpu **)idev->stats.icmpv6,
2891823e4c8SEric Dumazet 			  sizeof(struct icmpv6_mib),
2901823e4c8SEric Dumazet 			  __alignof__(struct icmpv6_mib)) < 0)
2917f7d9a6bSHerbert Xu 		goto err_icmp;
2927d720c3eSTejun Heo 	if (snmp_mib_init((void __percpu **)idev->stats.icmpv6msg,
2931823e4c8SEric Dumazet 			  sizeof(struct icmpv6msg_mib),
2941823e4c8SEric Dumazet 			  __alignof__(struct icmpv6msg_mib)) < 0)
29514878f75SDavid L Stevens 		goto err_icmpmsg;
2967f7d9a6bSHerbert Xu 
2977f7d9a6bSHerbert Xu 	return 0;
2987f7d9a6bSHerbert Xu 
29914878f75SDavid L Stevens err_icmpmsg:
3007d720c3eSTejun Heo 	snmp_mib_free((void __percpu **)idev->stats.icmpv6);
3017f7d9a6bSHerbert Xu err_icmp:
3027d720c3eSTejun Heo 	snmp_mib_free((void __percpu **)idev->stats.ipv6);
3037f7d9a6bSHerbert Xu err_ip:
304aaf70ec7SPavel Emelyanov 	return -ENOMEM;
3057f7d9a6bSHerbert Xu }
3067f7d9a6bSHerbert Xu 
30716910b98SPavel Emelyanov static void snmp6_free_dev(struct inet6_dev *idev)
3087f7d9a6bSHerbert Xu {
3097d720c3eSTejun Heo 	snmp_mib_free((void __percpu **)idev->stats.icmpv6msg);
3107d720c3eSTejun Heo 	snmp_mib_free((void __percpu **)idev->stats.icmpv6);
3117d720c3eSTejun Heo 	snmp_mib_free((void __percpu **)idev->stats.ipv6);
3127f7d9a6bSHerbert Xu }
3137f7d9a6bSHerbert Xu 
3141da177e4SLinus Torvalds /* Nobody refers to this device, we may destroy it. */
3151da177e4SLinus Torvalds 
3168814c4b5SYOSHIFUJI Hideaki static void in6_dev_finish_destroy_rcu(struct rcu_head *head)
3178814c4b5SYOSHIFUJI Hideaki {
3188814c4b5SYOSHIFUJI Hideaki 	struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu);
3198814c4b5SYOSHIFUJI Hideaki 	kfree(idev);
3208814c4b5SYOSHIFUJI Hideaki }
3218814c4b5SYOSHIFUJI Hideaki 
3221da177e4SLinus Torvalds void in6_dev_finish_destroy(struct inet6_dev *idev)
3231da177e4SLinus Torvalds {
3241da177e4SLinus Torvalds 	struct net_device *dev = idev->dev;
325547b792cSIlpo Järvinen 
326502a2ffdSstephen hemminger 	WARN_ON(!list_empty(&idev->addr_list));
327547b792cSIlpo Järvinen 	WARN_ON(idev->mc_list != NULL);
328547b792cSIlpo Järvinen 
3291da177e4SLinus Torvalds #ifdef NET_REFCNT_DEBUG
3301da177e4SLinus Torvalds 	printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
3311da177e4SLinus Torvalds #endif
3321da177e4SLinus Torvalds 	dev_put(dev);
3331da177e4SLinus Torvalds 	if (!idev->dead) {
334e21e8467SStephen Hemminger 		pr_warning("Freeing alive inet6 device %p\n", idev);
3351da177e4SLinus Torvalds 		return;
3361da177e4SLinus Torvalds 	}
3371da177e4SLinus Torvalds 	snmp6_free_dev(idev);
3388814c4b5SYOSHIFUJI Hideaki 	call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu);
3391da177e4SLinus Torvalds }
3401da177e4SLinus Torvalds 
3417159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(in6_dev_finish_destroy);
3427159039aSYOSHIFUJI Hideaki 
3431da177e4SLinus Torvalds static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
3441da177e4SLinus Torvalds {
3451da177e4SLinus Torvalds 	struct inet6_dev *ndev;
3461da177e4SLinus Torvalds 
3471da177e4SLinus Torvalds 	ASSERT_RTNL();
3481da177e4SLinus Torvalds 
3491da177e4SLinus Torvalds 	if (dev->mtu < IPV6_MIN_MTU)
3501da177e4SLinus Torvalds 		return NULL;
3511da177e4SLinus Torvalds 
352322f74a4SIngo Oeser 	ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
3531da177e4SLinus Torvalds 
354322f74a4SIngo Oeser 	if (ndev == NULL)
355322f74a4SIngo Oeser 		return NULL;
3561da177e4SLinus Torvalds 
3571da177e4SLinus Torvalds 	rwlock_init(&ndev->lock);
3581da177e4SLinus Torvalds 	ndev->dev = dev;
359502a2ffdSstephen hemminger 	INIT_LIST_HEAD(&ndev->addr_list);
360502a2ffdSstephen hemminger 
361c346dca1SYOSHIFUJI Hideaki 	memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf));
3621da177e4SLinus Torvalds 	ndev->cnf.mtu6 = dev->mtu;
3631da177e4SLinus Torvalds 	ndev->cnf.sysctl = NULL;
3641da177e4SLinus Torvalds 	ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
3651da177e4SLinus Torvalds 	if (ndev->nd_parms == NULL) {
3661da177e4SLinus Torvalds 		kfree(ndev);
3671da177e4SLinus Torvalds 		return NULL;
3681da177e4SLinus Torvalds 	}
3690187bdfbSBen Hutchings 	if (ndev->cnf.forwarding)
3700187bdfbSBen Hutchings 		dev_disable_lro(dev);
3711da177e4SLinus Torvalds 	/* We refer to the device */
3721da177e4SLinus Torvalds 	dev_hold(dev);
3731da177e4SLinus Torvalds 
3741da177e4SLinus Torvalds 	if (snmp6_alloc_dev(ndev) < 0) {
3751da177e4SLinus Torvalds 		ADBG((KERN_WARNING
3761da177e4SLinus Torvalds 			"%s(): cannot allocate memory for statistics; dev=%s.\n",
3770dc47877SHarvey Harrison 			__func__, dev->name));
3781da177e4SLinus Torvalds 		neigh_parms_release(&nd_tbl, ndev->nd_parms);
3791da177e4SLinus Torvalds 		ndev->dead = 1;
3801da177e4SLinus Torvalds 		in6_dev_finish_destroy(ndev);
3811da177e4SLinus Torvalds 		return NULL;
3821da177e4SLinus Torvalds 	}
3831da177e4SLinus Torvalds 
3841da177e4SLinus Torvalds 	if (snmp6_register_dev(ndev) < 0) {
3851da177e4SLinus Torvalds 		ADBG((KERN_WARNING
3861da177e4SLinus Torvalds 			"%s(): cannot create /proc/net/dev_snmp6/%s\n",
3870dc47877SHarvey Harrison 			__func__, dev->name));
3881da177e4SLinus Torvalds 		neigh_parms_release(&nd_tbl, ndev->nd_parms);
3891da177e4SLinus Torvalds 		ndev->dead = 1;
3901da177e4SLinus Torvalds 		in6_dev_finish_destroy(ndev);
3911da177e4SLinus Torvalds 		return NULL;
3921da177e4SLinus Torvalds 	}
3931da177e4SLinus Torvalds 
3941da177e4SLinus Torvalds 	/* One reference from device.  We must do this before
3951da177e4SLinus Torvalds 	 * we invoke __ipv6_regen_rndid().
3961da177e4SLinus Torvalds 	 */
3971da177e4SLinus Torvalds 	in6_dev_hold(ndev);
3981da177e4SLinus Torvalds 
3991b34be74SYOSHIFUJI Hideaki 	if (dev->flags & (IFF_NOARP | IFF_LOOPBACK))
4001b34be74SYOSHIFUJI Hideaki 		ndev->cnf.accept_dad = -1;
4011b34be74SYOSHIFUJI Hideaki 
4020be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
403c7dc89c0SFred L. Templin 	if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) {
404c7dc89c0SFred L. Templin 		printk(KERN_INFO
405c7dc89c0SFred L. Templin 		       "%s: Disabled Multicast RS\n",
406c7dc89c0SFred L. Templin 		       dev->name);
407c7dc89c0SFred L. Templin 		ndev->cnf.rtr_solicits = 0;
408c7dc89c0SFred L. Templin 	}
409b077d7abSYOSHIFUJI Hideaki #endif
410b077d7abSYOSHIFUJI Hideaki 
4111da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY
412372e6c8fSstephen hemminger 	INIT_LIST_HEAD(&ndev->tempaddr_list);
4131da177e4SLinus Torvalds 	setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev);
4141da177e4SLinus Torvalds 	if ((dev->flags&IFF_LOOPBACK) ||
4151da177e4SLinus Torvalds 	    dev->type == ARPHRD_TUNNEL ||
4169625ed72SYOSHIFUJI Hideaki 	    dev->type == ARPHRD_TUNNEL6 ||
4171da177e4SLinus Torvalds 	    dev->type == ARPHRD_SIT ||
4181da177e4SLinus Torvalds 	    dev->type == ARPHRD_NONE) {
4191da177e4SLinus Torvalds 		printk(KERN_INFO
4201da177e4SLinus Torvalds 		       "%s: Disabled Privacy Extensions\n",
4211da177e4SLinus Torvalds 		       dev->name);
4221da177e4SLinus Torvalds 		ndev->cnf.use_tempaddr = -1;
4231da177e4SLinus Torvalds 	} else {
4241da177e4SLinus Torvalds 		in6_dev_hold(ndev);
4251da177e4SLinus Torvalds 		ipv6_regen_rndid((unsigned long) ndev);
4261da177e4SLinus Torvalds 	}
4271da177e4SLinus Torvalds #endif
4281da177e4SLinus Torvalds 
429f24e3d65SMitsuru Chinen 	if (netif_running(dev) && addrconf_qdisc_ok(dev))
43053aadcc9SHerbert Xu 		ndev->if_flags |= IF_READY;
43153aadcc9SHerbert Xu 
4321da177e4SLinus Torvalds 	ipv6_mc_init_dev(ndev);
4331da177e4SLinus Torvalds 	ndev->tstamp = jiffies;
434f52295a9SPavel Emelyanov 	addrconf_sysctl_register(ndev);
43530c4cf57SDavid L Stevens 	/* protected by rtnl_lock */
43630c4cf57SDavid L Stevens 	rcu_assign_pointer(dev->ip6_ptr, ndev);
437d88ae4ccSYOSHIFUJI Hideaki 
438d88ae4ccSYOSHIFUJI Hideaki 	/* Join all-node multicast group */
439f3ee4010SYOSHIFUJI Hideaki 	ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
440d88ae4ccSYOSHIFUJI Hideaki 
4411da177e4SLinus Torvalds 	return ndev;
4421da177e4SLinus Torvalds }
4431da177e4SLinus Torvalds 
444cee89473SYOSHIFUJI Hideaki static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
4451da177e4SLinus Torvalds {
4461da177e4SLinus Torvalds 	struct inet6_dev *idev;
4471da177e4SLinus Torvalds 
4481da177e4SLinus Torvalds 	ASSERT_RTNL();
4491da177e4SLinus Torvalds 
450e21e8467SStephen Hemminger 	idev = __in6_dev_get(dev);
451e21e8467SStephen Hemminger 	if (!idev) {
452e21e8467SStephen Hemminger 		idev = ipv6_add_dev(dev);
453e21e8467SStephen Hemminger 		if (!idev)
4541da177e4SLinus Torvalds 			return NULL;
4551da177e4SLinus Torvalds 	}
456c5e33bddSYOSHIFUJI Hideaki 
4571da177e4SLinus Torvalds 	if (dev->flags&IFF_UP)
4581da177e4SLinus Torvalds 		ipv6_mc_up(idev);
4591da177e4SLinus Torvalds 	return idev;
4601da177e4SLinus Torvalds }
4611da177e4SLinus Torvalds 
4621da177e4SLinus Torvalds #ifdef CONFIG_SYSCTL
4631da177e4SLinus Torvalds static void dev_forward_change(struct inet6_dev *idev)
4641da177e4SLinus Torvalds {
4651da177e4SLinus Torvalds 	struct net_device *dev;
4661da177e4SLinus Torvalds 	struct inet6_ifaddr *ifa;
4671da177e4SLinus Torvalds 
4681da177e4SLinus Torvalds 	if (!idev)
4691da177e4SLinus Torvalds 		return;
4701da177e4SLinus Torvalds 	dev = idev->dev;
4710187bdfbSBen Hutchings 	if (idev->cnf.forwarding)
4720187bdfbSBen Hutchings 		dev_disable_lro(dev);
4731da177e4SLinus Torvalds 	if (dev && (dev->flags & IFF_MULTICAST)) {
4741da177e4SLinus Torvalds 		if (idev->cnf.forwarding)
475f3ee4010SYOSHIFUJI Hideaki 			ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
4761da177e4SLinus Torvalds 		else
477f3ee4010SYOSHIFUJI Hideaki 			ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters);
4781da177e4SLinus Torvalds 	}
479502a2ffdSstephen hemminger 
480502a2ffdSstephen hemminger 	list_for_each_entry(ifa, &idev->addr_list, if_list) {
4812c12a74cSMichal Wrobel 		if (ifa->flags&IFA_F_TENTATIVE)
4822c12a74cSMichal Wrobel 			continue;
4831da177e4SLinus Torvalds 		if (idev->cnf.forwarding)
4841da177e4SLinus Torvalds 			addrconf_join_anycast(ifa);
4851da177e4SLinus Torvalds 		else
4861da177e4SLinus Torvalds 			addrconf_leave_anycast(ifa);
4871da177e4SLinus Torvalds 	}
4881da177e4SLinus Torvalds }
4891da177e4SLinus Torvalds 
4901da177e4SLinus Torvalds 
491e186932bSPavel Emelyanov static void addrconf_forward_change(struct net *net, __s32 newf)
4921da177e4SLinus Torvalds {
4931da177e4SLinus Torvalds 	struct net_device *dev;
4941da177e4SLinus Torvalds 	struct inet6_dev *idev;
4951da177e4SLinus Torvalds 
4968814c4b5SYOSHIFUJI Hideaki 	rcu_read_lock();
497c6d14c84SEric Dumazet 	for_each_netdev_rcu(net, dev) {
4981da177e4SLinus Torvalds 		idev = __in6_dev_get(dev);
4991da177e4SLinus Torvalds 		if (idev) {
500e186932bSPavel Emelyanov 			int changed = (!idev->cnf.forwarding) ^ (!newf);
501e186932bSPavel Emelyanov 			idev->cnf.forwarding = newf;
5021da177e4SLinus Torvalds 			if (changed)
5031da177e4SLinus Torvalds 				dev_forward_change(idev);
5041da177e4SLinus Torvalds 		}
5051da177e4SLinus Torvalds 	}
506c6d14c84SEric Dumazet 	rcu_read_unlock();
5071da177e4SLinus Torvalds }
508c8fecf22SPavel Emelyanov 
509b325fddbSStephen Hemminger static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old)
510c8fecf22SPavel Emelyanov {
511bff16c2fSPavel Emelyanov 	struct net *net;
512bff16c2fSPavel Emelyanov 
513bff16c2fSPavel Emelyanov 	net = (struct net *)table->extra2;
514441fc2a2SPavel Emelyanov 	if (p == &net->ipv6.devconf_dflt->forwarding)
515b325fddbSStephen Hemminger 		return 0;
516c8fecf22SPavel Emelyanov 
51788af182eSEric W. Biederman 	if (!rtnl_trylock()) {
51888af182eSEric W. Biederman 		/* Restore the original values before restarting */
51988af182eSEric W. Biederman 		*p = old;
5205007392dSEric W. Biederman 		return restart_syscall();
52188af182eSEric W. Biederman 	}
522b325fddbSStephen Hemminger 
523e186932bSPavel Emelyanov 	if (p == &net->ipv6.devconf_all->forwarding) {
524e186932bSPavel Emelyanov 		__s32 newf = net->ipv6.devconf_all->forwarding;
525e186932bSPavel Emelyanov 		net->ipv6.devconf_dflt->forwarding = newf;
526e186932bSPavel Emelyanov 		addrconf_forward_change(net, newf);
527c8fecf22SPavel Emelyanov 	} else if ((!*p) ^ (!old))
528c8fecf22SPavel Emelyanov 		dev_forward_change((struct inet6_dev *)table->extra1);
5290187bdfbSBen Hutchings 	rtnl_unlock();
530c8fecf22SPavel Emelyanov 
531c8fecf22SPavel Emelyanov 	if (*p)
5327b4da532SDaniel Lezcano 		rt6_purge_dflt_routers(net);
533b325fddbSStephen Hemminger 	return 1;
534c8fecf22SPavel Emelyanov }
5351da177e4SLinus Torvalds #endif
5361da177e4SLinus Torvalds 
5375c578aedSstephen hemminger static void inet6_ifa_finish_destroy_rcu(struct rcu_head *head)
5385c578aedSstephen hemminger {
5395c578aedSstephen hemminger 	struct inet6_ifaddr *ifp = container_of(head, struct inet6_ifaddr, rcu);
5405c578aedSstephen hemminger 	kfree(ifp);
5415c578aedSstephen hemminger }
5421da177e4SLinus Torvalds 
5435c578aedSstephen hemminger /* Nobody refers to this ifaddr, destroy it */
5441da177e4SLinus Torvalds void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
5451da177e4SLinus Torvalds {
546c2e21293Sstephen hemminger 	WARN_ON(!hlist_unhashed(&ifp->addr_lst));
547547b792cSIlpo Järvinen 
5481da177e4SLinus Torvalds #ifdef NET_REFCNT_DEBUG
5491da177e4SLinus Torvalds 	printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
5501da177e4SLinus Torvalds #endif
5511da177e4SLinus Torvalds 
5521da177e4SLinus Torvalds 	in6_dev_put(ifp->idev);
5531da177e4SLinus Torvalds 
5541da177e4SLinus Torvalds 	if (del_timer(&ifp->timer))
555e21e8467SStephen Hemminger 		pr_notice("Timer is still running, when freeing ifa=%p\n", ifp);
5561da177e4SLinus Torvalds 
557e9d3e084SHerbert Xu 	if (ifp->state != INET6_IFADDR_STATE_DEAD) {
558e21e8467SStephen Hemminger 		pr_warning("Freeing alive inet6 address %p\n", ifp);
5591da177e4SLinus Torvalds 		return;
5601da177e4SLinus Torvalds 	}
561d8d1f30bSChangli Gao 	dst_release(&ifp->rt->dst);
5621da177e4SLinus Torvalds 
5635c578aedSstephen hemminger 	call_rcu(&ifp->rcu, inet6_ifa_finish_destroy_rcu);
5641da177e4SLinus Torvalds }
5651da177e4SLinus Torvalds 
566e55ffac6SBrian Haley static void
567e55ffac6SBrian Haley ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
568e55ffac6SBrian Haley {
569502a2ffdSstephen hemminger 	struct list_head *p;
5708a6ce0c0SYOSHIFUJI Hideaki 	int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
571e55ffac6SBrian Haley 
572e55ffac6SBrian Haley 	/*
573e55ffac6SBrian Haley 	 * Each device address list is sorted in order of scope -
574e55ffac6SBrian Haley 	 * global before linklocal.
575e55ffac6SBrian Haley 	 */
576502a2ffdSstephen hemminger 	list_for_each(p, &idev->addr_list) {
577502a2ffdSstephen hemminger 		struct inet6_ifaddr *ifa
578502a2ffdSstephen hemminger 			= list_entry(p, struct inet6_ifaddr, if_list);
5798a6ce0c0SYOSHIFUJI Hideaki 		if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
580e55ffac6SBrian Haley 			break;
581e55ffac6SBrian Haley 	}
582e55ffac6SBrian Haley 
583b54c9b98SDavid S. Miller 	list_add_tail(&ifp->if_list, p);
584e55ffac6SBrian Haley }
585e55ffac6SBrian Haley 
5863a88a81dSstephen hemminger static u32 ipv6_addr_hash(const struct in6_addr *addr)
5873eb84f49SYOSHIFUJI Hideaki {
5883eb84f49SYOSHIFUJI Hideaki 	/*
5893eb84f49SYOSHIFUJI Hideaki 	 * We perform the hash function over the last 64 bits of the address
5903eb84f49SYOSHIFUJI Hideaki 	 * This will include the IEEE address token on links that support it.
5913eb84f49SYOSHIFUJI Hideaki 	 */
5920eae88f3SEric Dumazet 	return jhash_2words((__force u32)addr->s6_addr32[2],
5930eae88f3SEric Dumazet 			    (__force u32)addr->s6_addr32[3], 0)
5943a88a81dSstephen hemminger 		& (IN6_ADDR_HSIZE - 1);
5953eb84f49SYOSHIFUJI Hideaki }
5963eb84f49SYOSHIFUJI Hideaki 
5971da177e4SLinus Torvalds /* On success it returns ifp with increased reference count */
5981da177e4SLinus Torvalds 
5991da177e4SLinus Torvalds static struct inet6_ifaddr *
6001da177e4SLinus Torvalds ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
601e431b8c0SJamal Hadi Salim 	      int scope, u32 flags)
6021da177e4SLinus Torvalds {
6031da177e4SLinus Torvalds 	struct inet6_ifaddr *ifa = NULL;
6041da177e4SLinus Torvalds 	struct rt6_info *rt;
6053a88a81dSstephen hemminger 	unsigned int hash;
6061da177e4SLinus Torvalds 	int err = 0;
607d68b8270SYOSHIFUJI Hideaki 	int addr_type = ipv6_addr_type(addr);
608d68b8270SYOSHIFUJI Hideaki 
609d68b8270SYOSHIFUJI Hideaki 	if (addr_type == IPV6_ADDR_ANY ||
610d68b8270SYOSHIFUJI Hideaki 	    addr_type & IPV6_ADDR_MULTICAST ||
611d68b8270SYOSHIFUJI Hideaki 	    (!(idev->dev->flags & IFF_LOOPBACK) &&
612d68b8270SYOSHIFUJI Hideaki 	     addr_type & IPV6_ADDR_LOOPBACK))
613d68b8270SYOSHIFUJI Hideaki 		return ERR_PTR(-EADDRNOTAVAIL);
6141da177e4SLinus Torvalds 
6158814c4b5SYOSHIFUJI Hideaki 	rcu_read_lock_bh();
6161da177e4SLinus Torvalds 	if (idev->dead) {
6171da177e4SLinus Torvalds 		err = -ENODEV;			/*XXX*/
6181da177e4SLinus Torvalds 		goto out2;
6191da177e4SLinus Torvalds 	}
6201da177e4SLinus Torvalds 
62156d417b1SBrian Haley 	if (idev->cnf.disable_ipv6) {
6229bdd8d40SBrian Haley 		err = -EACCES;
6239bdd8d40SBrian Haley 		goto out2;
6249bdd8d40SBrian Haley 	}
6259bdd8d40SBrian Haley 
6265c578aedSstephen hemminger 	spin_lock(&addrconf_hash_lock);
6271da177e4SLinus Torvalds 
6281da177e4SLinus Torvalds 	/* Ignore adding duplicate addresses on an interface */
629c346dca1SYOSHIFUJI Hideaki 	if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) {
6301da177e4SLinus Torvalds 		ADBG(("ipv6_add_addr: already assigned\n"));
6311da177e4SLinus Torvalds 		err = -EEXIST;
6321da177e4SLinus Torvalds 		goto out;
6331da177e4SLinus Torvalds 	}
6341da177e4SLinus Torvalds 
635322f74a4SIngo Oeser 	ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
6361da177e4SLinus Torvalds 
6371da177e4SLinus Torvalds 	if (ifa == NULL) {
6381da177e4SLinus Torvalds 		ADBG(("ipv6_add_addr: malloc failed\n"));
6391da177e4SLinus Torvalds 		err = -ENOBUFS;
6401da177e4SLinus Torvalds 		goto out;
6411da177e4SLinus Torvalds 	}
6421da177e4SLinus Torvalds 
6431da177e4SLinus Torvalds 	rt = addrconf_dst_alloc(idev, addr, 0);
6441da177e4SLinus Torvalds 	if (IS_ERR(rt)) {
6451da177e4SLinus Torvalds 		err = PTR_ERR(rt);
6461da177e4SLinus Torvalds 		goto out;
6471da177e4SLinus Torvalds 	}
6481da177e4SLinus Torvalds 
6491da177e4SLinus Torvalds 	ipv6_addr_copy(&ifa->addr, addr);
6501da177e4SLinus Torvalds 
6511da177e4SLinus Torvalds 	spin_lock_init(&ifa->lock);
652e9d3e084SHerbert Xu 	spin_lock_init(&ifa->state_lock);
6531da177e4SLinus Torvalds 	init_timer(&ifa->timer);
654c2e21293Sstephen hemminger 	INIT_HLIST_NODE(&ifa->addr_lst);
6551da177e4SLinus Torvalds 	ifa->timer.data = (unsigned long) ifa;
6561da177e4SLinus Torvalds 	ifa->scope = scope;
6571da177e4SLinus Torvalds 	ifa->prefix_len = pfxlen;
6581da177e4SLinus Torvalds 	ifa->flags = flags | IFA_F_TENTATIVE;
6591da177e4SLinus Torvalds 	ifa->cstamp = ifa->tstamp = jiffies;
6601da177e4SLinus Torvalds 
66157f5f544SKeir Fraser 	ifa->rt = rt;
66257f5f544SKeir Fraser 
66395c385b4SNeil Horman 	/*
66495c385b4SNeil Horman 	 * part one of RFC 4429, section 3.3
66595c385b4SNeil Horman 	 * We should not configure an address as
66695c385b4SNeil Horman 	 * optimistic if we do not yet know the link
66795c385b4SNeil Horman 	 * layer address of our nexhop router
66895c385b4SNeil Horman 	 */
66995c385b4SNeil Horman 
67095c385b4SNeil Horman 	if (rt->rt6i_nexthop == NULL)
67195c385b4SNeil Horman 		ifa->flags &= ~IFA_F_OPTIMISTIC;
67295c385b4SNeil Horman 
6731da177e4SLinus Torvalds 	ifa->idev = idev;
6741da177e4SLinus Torvalds 	in6_dev_hold(idev);
6751da177e4SLinus Torvalds 	/* For caller */
6761da177e4SLinus Torvalds 	in6_ifa_hold(ifa);
6771da177e4SLinus Torvalds 
6781da177e4SLinus Torvalds 	/* Add to big hash table */
6791da177e4SLinus Torvalds 	hash = ipv6_addr_hash(addr);
6801da177e4SLinus Torvalds 
6815c578aedSstephen hemminger 	hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]);
6825c578aedSstephen hemminger 	spin_unlock(&addrconf_hash_lock);
6831da177e4SLinus Torvalds 
6841da177e4SLinus Torvalds 	write_lock(&idev->lock);
6851da177e4SLinus Torvalds 	/* Add to inet6_dev unicast addr list. */
686e55ffac6SBrian Haley 	ipv6_link_dev_addr(idev, ifa);
6871da177e4SLinus Torvalds 
6881da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY
6891da177e4SLinus Torvalds 	if (ifa->flags&IFA_F_TEMPORARY) {
690372e6c8fSstephen hemminger 		list_add(&ifa->tmp_list, &idev->tempaddr_list);
6911da177e4SLinus Torvalds 		in6_ifa_hold(ifa);
6921da177e4SLinus Torvalds 	}
6931da177e4SLinus Torvalds #endif
6941da177e4SLinus Torvalds 
6951da177e4SLinus Torvalds 	in6_ifa_hold(ifa);
6961da177e4SLinus Torvalds 	write_unlock(&idev->lock);
6971da177e4SLinus Torvalds out2:
6988814c4b5SYOSHIFUJI Hideaki 	rcu_read_unlock_bh();
6991da177e4SLinus Torvalds 
700fd92833aSYOSHIFUJI Hideaki 	if (likely(err == 0))
701e041c683SAlan Stern 		atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
7021da177e4SLinus Torvalds 	else {
7031da177e4SLinus Torvalds 		kfree(ifa);
7041da177e4SLinus Torvalds 		ifa = ERR_PTR(err);
7051da177e4SLinus Torvalds 	}
7061da177e4SLinus Torvalds 
7071da177e4SLinus Torvalds 	return ifa;
7081da177e4SLinus Torvalds out:
7095c578aedSstephen hemminger 	spin_unlock(&addrconf_hash_lock);
7101da177e4SLinus Torvalds 	goto out2;
7111da177e4SLinus Torvalds }
7121da177e4SLinus Torvalds 
7131da177e4SLinus Torvalds /* This function wants to get referenced ifp and releases it before return */
7141da177e4SLinus Torvalds 
7151da177e4SLinus Torvalds static void ipv6_del_addr(struct inet6_ifaddr *ifp)
7161da177e4SLinus Torvalds {
717502a2ffdSstephen hemminger 	struct inet6_ifaddr *ifa, *ifn;
7181da177e4SLinus Torvalds 	struct inet6_dev *idev = ifp->idev;
7194c5ff6a6SHerbert Xu 	int state;
7201da177e4SLinus Torvalds 	int hash;
7211da177e4SLinus Torvalds 	int deleted = 0, onlink = 0;
7221da177e4SLinus Torvalds 	unsigned long expires = jiffies;
7231da177e4SLinus Torvalds 
7241da177e4SLinus Torvalds 	hash = ipv6_addr_hash(&ifp->addr);
7251da177e4SLinus Torvalds 
7264c5ff6a6SHerbert Xu 	spin_lock_bh(&ifp->state_lock);
7274c5ff6a6SHerbert Xu 	state = ifp->state;
728e9d3e084SHerbert Xu 	ifp->state = INET6_IFADDR_STATE_DEAD;
7294c5ff6a6SHerbert Xu 	spin_unlock_bh(&ifp->state_lock);
7304c5ff6a6SHerbert Xu 
7314c5ff6a6SHerbert Xu 	if (state == INET6_IFADDR_STATE_DEAD)
7324c5ff6a6SHerbert Xu 		goto out;
7331da177e4SLinus Torvalds 
7345c578aedSstephen hemminger 	spin_lock_bh(&addrconf_hash_lock);
7355c578aedSstephen hemminger 	hlist_del_init_rcu(&ifp->addr_lst);
7365c578aedSstephen hemminger 	spin_unlock_bh(&addrconf_hash_lock);
7371da177e4SLinus Torvalds 
7381da177e4SLinus Torvalds 	write_lock_bh(&idev->lock);
7391da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY
7401da177e4SLinus Torvalds 	if (ifp->flags&IFA_F_TEMPORARY) {
741372e6c8fSstephen hemminger 		list_del(&ifp->tmp_list);
7421da177e4SLinus Torvalds 		if (ifp->ifpub) {
7431da177e4SLinus Torvalds 			in6_ifa_put(ifp->ifpub);
7441da177e4SLinus Torvalds 			ifp->ifpub = NULL;
7451da177e4SLinus Torvalds 		}
7461da177e4SLinus Torvalds 		__in6_ifa_put(ifp);
7471da177e4SLinus Torvalds 	}
7481da177e4SLinus Torvalds #endif
7491da177e4SLinus Torvalds 
750502a2ffdSstephen hemminger 	list_for_each_entry_safe(ifa, ifn, &idev->addr_list, if_list) {
7511da177e4SLinus Torvalds 		if (ifa == ifp) {
752502a2ffdSstephen hemminger 			list_del_init(&ifp->if_list);
7531da177e4SLinus Torvalds 			__in6_ifa_put(ifp);
754502a2ffdSstephen hemminger 
7551da177e4SLinus Torvalds 			if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
7561da177e4SLinus Torvalds 				break;
7571da177e4SLinus Torvalds 			deleted = 1;
7581d142804SKristian Slavov 			continue;
7591da177e4SLinus Torvalds 		} else if (ifp->flags & IFA_F_PERMANENT) {
7601da177e4SLinus Torvalds 			if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
7611da177e4SLinus Torvalds 					      ifp->prefix_len)) {
7621da177e4SLinus Torvalds 				if (ifa->flags & IFA_F_PERMANENT) {
7631da177e4SLinus Torvalds 					onlink = 1;
7641da177e4SLinus Torvalds 					if (deleted)
7651da177e4SLinus Torvalds 						break;
7661da177e4SLinus Torvalds 				} else {
7671da177e4SLinus Torvalds 					unsigned long lifetime;
7681da177e4SLinus Torvalds 
7691da177e4SLinus Torvalds 					if (!onlink)
7701da177e4SLinus Torvalds 						onlink = -1;
7711da177e4SLinus Torvalds 
7721da177e4SLinus Torvalds 					spin_lock(&ifa->lock);
7734bed72e4SYOSHIFUJI Hideaki 
7744bed72e4SYOSHIFUJI Hideaki 					lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ);
7754bed72e4SYOSHIFUJI Hideaki 					/*
7764bed72e4SYOSHIFUJI Hideaki 					 * Note: Because this address is
7774bed72e4SYOSHIFUJI Hideaki 					 * not permanent, lifetime <
7784bed72e4SYOSHIFUJI Hideaki 					 * LONG_MAX / HZ here.
7794bed72e4SYOSHIFUJI Hideaki 					 */
7801da177e4SLinus Torvalds 					if (time_before(expires,
7811da177e4SLinus Torvalds 							ifa->tstamp + lifetime * HZ))
7821da177e4SLinus Torvalds 						expires = ifa->tstamp + lifetime * HZ;
7831da177e4SLinus Torvalds 					spin_unlock(&ifa->lock);
7841da177e4SLinus Torvalds 				}
7851da177e4SLinus Torvalds 			}
7861da177e4SLinus Torvalds 		}
7871da177e4SLinus Torvalds 	}
7881da177e4SLinus Torvalds 	write_unlock_bh(&idev->lock);
7891da177e4SLinus Torvalds 
790b2238566SAndrey Vagin 	addrconf_del_timer(ifp);
791b2238566SAndrey Vagin 
7921da177e4SLinus Torvalds 	ipv6_ifa_notify(RTM_DELADDR, ifp);
7931da177e4SLinus Torvalds 
794e041c683SAlan Stern 	atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
7951da177e4SLinus Torvalds 
7961da177e4SLinus Torvalds 	/*
7971da177e4SLinus Torvalds 	 * Purge or update corresponding prefix
7981da177e4SLinus Torvalds 	 *
7991da177e4SLinus Torvalds 	 * 1) we don't purge prefix here if address was not permanent.
8001da177e4SLinus Torvalds 	 *    prefix is managed by its own lifetime.
8011da177e4SLinus Torvalds 	 * 2) if there're no addresses, delete prefix.
8021da177e4SLinus Torvalds 	 * 3) if there're still other permanent address(es),
8031da177e4SLinus Torvalds 	 *    corresponding prefix is still permanent.
8041da177e4SLinus Torvalds 	 * 4) otherwise, update prefix lifetime to the
8051da177e4SLinus Torvalds 	 *    longest valid lifetime among the corresponding
8061da177e4SLinus Torvalds 	 *    addresses on the device.
8071da177e4SLinus Torvalds 	 *    Note: subsequent RA will update lifetime.
8081da177e4SLinus Torvalds 	 *
8091da177e4SLinus Torvalds 	 * --yoshfuji
8101da177e4SLinus Torvalds 	 */
8111da177e4SLinus Torvalds 	if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
8121da177e4SLinus Torvalds 		struct in6_addr prefix;
8131da177e4SLinus Torvalds 		struct rt6_info *rt;
814c346dca1SYOSHIFUJI Hideaki 		struct net *net = dev_net(ifp->idev->dev);
8151da177e4SLinus Torvalds 		ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
8166fda7350SBenjamin Thery 		rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1);
8171da177e4SLinus Torvalds 
8182b5ead46SYOSHIFUJI Hideaki 		if (rt && addrconf_is_prefix_route(rt)) {
8191da177e4SLinus Torvalds 			if (onlink == 0) {
820e0a1ad73SThomas Graf 				ip6_del_rt(rt);
8211da177e4SLinus Torvalds 				rt = NULL;
8221da177e4SLinus Torvalds 			} else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
8231da177e4SLinus Torvalds 				rt->rt6i_expires = expires;
8241da177e4SLinus Torvalds 				rt->rt6i_flags |= RTF_EXPIRES;
8251da177e4SLinus Torvalds 			}
8261da177e4SLinus Torvalds 		}
827d8d1f30bSChangli Gao 		dst_release(&rt->dst);
8281da177e4SLinus Torvalds 	}
8291da177e4SLinus Torvalds 
8304c5ff6a6SHerbert Xu out:
8311da177e4SLinus Torvalds 	in6_ifa_put(ifp);
8321da177e4SLinus Torvalds }
8331da177e4SLinus Torvalds 
8341da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY
8351da177e4SLinus Torvalds static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
8361da177e4SLinus Torvalds {
8371da177e4SLinus Torvalds 	struct inet6_dev *idev = ifp->idev;
8381da177e4SLinus Torvalds 	struct in6_addr addr, *tmpaddr;
8397a876b0eSGlenn Wurster 	unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp, age;
840eac55bf9SBenoit Boissinot 	unsigned long regen_advance;
8411da177e4SLinus Torvalds 	int tmp_plen;
8421da177e4SLinus Torvalds 	int ret = 0;
8431da177e4SLinus Torvalds 	int max_addresses;
84495c385b4SNeil Horman 	u32 addr_flags;
8451da177e4SLinus Torvalds 
8461da177e4SLinus Torvalds 	write_lock(&idev->lock);
8471da177e4SLinus Torvalds 	if (ift) {
8481da177e4SLinus Torvalds 		spin_lock_bh(&ift->lock);
8491da177e4SLinus Torvalds 		memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
8501da177e4SLinus Torvalds 		spin_unlock_bh(&ift->lock);
8511da177e4SLinus Torvalds 		tmpaddr = &addr;
8521da177e4SLinus Torvalds 	} else {
8531da177e4SLinus Torvalds 		tmpaddr = NULL;
8541da177e4SLinus Torvalds 	}
8551da177e4SLinus Torvalds retry:
8561da177e4SLinus Torvalds 	in6_dev_hold(idev);
8571da177e4SLinus Torvalds 	if (idev->cnf.use_tempaddr <= 0) {
8581da177e4SLinus Torvalds 		write_unlock(&idev->lock);
8591da177e4SLinus Torvalds 		printk(KERN_INFO
8601da177e4SLinus Torvalds 			"ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
8611da177e4SLinus Torvalds 		in6_dev_put(idev);
8621da177e4SLinus Torvalds 		ret = -1;
8631da177e4SLinus Torvalds 		goto out;
8641da177e4SLinus Torvalds 	}
8651da177e4SLinus Torvalds 	spin_lock_bh(&ifp->lock);
8661da177e4SLinus Torvalds 	if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
8671da177e4SLinus Torvalds 		idev->cnf.use_tempaddr = -1;	/*XXX*/
8681da177e4SLinus Torvalds 		spin_unlock_bh(&ifp->lock);
8691da177e4SLinus Torvalds 		write_unlock(&idev->lock);
8701da177e4SLinus Torvalds 		printk(KERN_WARNING
8711da177e4SLinus Torvalds 			"ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
8721da177e4SLinus Torvalds 		in6_dev_put(idev);
8731da177e4SLinus Torvalds 		ret = -1;
8741da177e4SLinus Torvalds 		goto out;
8751da177e4SLinus Torvalds 	}
8761da177e4SLinus Torvalds 	in6_ifa_hold(ifp);
8771da177e4SLinus Torvalds 	memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
8781da177e4SLinus Torvalds 	if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
8791da177e4SLinus Torvalds 		spin_unlock_bh(&ifp->lock);
8801da177e4SLinus Torvalds 		write_unlock(&idev->lock);
8811da177e4SLinus Torvalds 		printk(KERN_WARNING
8821da177e4SLinus Torvalds 			"ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
8831da177e4SLinus Torvalds 		in6_ifa_put(ifp);
8841da177e4SLinus Torvalds 		in6_dev_put(idev);
8851da177e4SLinus Torvalds 		ret = -1;
8861da177e4SLinus Torvalds 		goto out;
8871da177e4SLinus Torvalds 	}
8881da177e4SLinus Torvalds 	memcpy(&addr.s6_addr[8], idev->rndid, 8);
8897a876b0eSGlenn Wurster 	age = (jiffies - ifp->tstamp) / HZ;
8901da177e4SLinus Torvalds 	tmp_valid_lft = min_t(__u32,
8911da177e4SLinus Torvalds 			      ifp->valid_lft,
8927a876b0eSGlenn Wurster 			      idev->cnf.temp_valid_lft + age);
8931da177e4SLinus Torvalds 	tmp_prefered_lft = min_t(__u32,
8941da177e4SLinus Torvalds 				 ifp->prefered_lft,
8957a876b0eSGlenn Wurster 				 idev->cnf.temp_prefered_lft + age -
896784e2710SBen Hutchings 				 idev->cnf.max_desync_factor);
8971da177e4SLinus Torvalds 	tmp_plen = ifp->prefix_len;
8981da177e4SLinus Torvalds 	max_addresses = idev->cnf.max_addresses;
8991da177e4SLinus Torvalds 	tmp_cstamp = ifp->cstamp;
9001da177e4SLinus Torvalds 	tmp_tstamp = ifp->tstamp;
9011da177e4SLinus Torvalds 	spin_unlock_bh(&ifp->lock);
9021da177e4SLinus Torvalds 
903eac55bf9SBenoit Boissinot 	regen_advance = idev->cnf.regen_max_retry *
904eac55bf9SBenoit Boissinot 	                idev->cnf.dad_transmits *
905eac55bf9SBenoit Boissinot 	                idev->nd_parms->retrans_time / HZ;
9061da177e4SLinus Torvalds 	write_unlock(&idev->lock);
90795c385b4SNeil Horman 
908eac55bf9SBenoit Boissinot 	/* A temporary address is created only if this calculated Preferred
909eac55bf9SBenoit Boissinot 	 * Lifetime is greater than REGEN_ADVANCE time units.  In particular,
910eac55bf9SBenoit Boissinot 	 * an implementation must not create a temporary address with a zero
911eac55bf9SBenoit Boissinot 	 * Preferred Lifetime.
912eac55bf9SBenoit Boissinot 	 */
913eac55bf9SBenoit Boissinot 	if (tmp_prefered_lft <= regen_advance) {
914eac55bf9SBenoit Boissinot 		in6_ifa_put(ifp);
915eac55bf9SBenoit Boissinot 		in6_dev_put(idev);
916eac55bf9SBenoit Boissinot 		ret = -1;
917eac55bf9SBenoit Boissinot 		goto out;
918eac55bf9SBenoit Boissinot 	}
919eac55bf9SBenoit Boissinot 
92095c385b4SNeil Horman 	addr_flags = IFA_F_TEMPORARY;
92195c385b4SNeil Horman 	/* set in addrconf_prefix_rcv() */
92295c385b4SNeil Horman 	if (ifp->flags & IFA_F_OPTIMISTIC)
92395c385b4SNeil Horman 		addr_flags |= IFA_F_OPTIMISTIC;
92495c385b4SNeil Horman 
9251da177e4SLinus Torvalds 	ift = !max_addresses ||
9261da177e4SLinus Torvalds 	      ipv6_count_addresses(idev) < max_addresses ?
9271da177e4SLinus Torvalds 		ipv6_add_addr(idev, &addr, tmp_plen,
92895c385b4SNeil Horman 			      ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK,
92995c385b4SNeil Horman 			      addr_flags) : NULL;
9301da177e4SLinus Torvalds 	if (!ift || IS_ERR(ift)) {
9311da177e4SLinus Torvalds 		in6_ifa_put(ifp);
9321da177e4SLinus Torvalds 		in6_dev_put(idev);
9331da177e4SLinus Torvalds 		printk(KERN_INFO
9341da177e4SLinus Torvalds 			"ipv6_create_tempaddr(): retry temporary address regeneration.\n");
9351da177e4SLinus Torvalds 		tmpaddr = &addr;
9361da177e4SLinus Torvalds 		write_lock(&idev->lock);
9371da177e4SLinus Torvalds 		goto retry;
9381da177e4SLinus Torvalds 	}
9391da177e4SLinus Torvalds 
9401da177e4SLinus Torvalds 	spin_lock_bh(&ift->lock);
9411da177e4SLinus Torvalds 	ift->ifpub = ifp;
9421da177e4SLinus Torvalds 	ift->valid_lft = tmp_valid_lft;
9431da177e4SLinus Torvalds 	ift->prefered_lft = tmp_prefered_lft;
9441da177e4SLinus Torvalds 	ift->cstamp = tmp_cstamp;
9451da177e4SLinus Torvalds 	ift->tstamp = tmp_tstamp;
9461da177e4SLinus Torvalds 	spin_unlock_bh(&ift->lock);
9471da177e4SLinus Torvalds 
9481da177e4SLinus Torvalds 	addrconf_dad_start(ift, 0);
9491da177e4SLinus Torvalds 	in6_ifa_put(ift);
9501da177e4SLinus Torvalds 	in6_dev_put(idev);
9511da177e4SLinus Torvalds out:
9521da177e4SLinus Torvalds 	return ret;
9531da177e4SLinus Torvalds }
9541da177e4SLinus Torvalds #endif
9551da177e4SLinus Torvalds 
9561da177e4SLinus Torvalds /*
957072047e4SYOSHIFUJI Hideaki  *	Choose an appropriate source address (RFC3484)
9581da177e4SLinus Torvalds  */
959a9b05723SYOSHIFUJI Hideaki enum {
960a9b05723SYOSHIFUJI Hideaki 	IPV6_SADDR_RULE_INIT = 0,
961a9b05723SYOSHIFUJI Hideaki 	IPV6_SADDR_RULE_LOCAL,
962a9b05723SYOSHIFUJI Hideaki 	IPV6_SADDR_RULE_SCOPE,
963a9b05723SYOSHIFUJI Hideaki 	IPV6_SADDR_RULE_PREFERRED,
964a9b05723SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_MIP6
965a9b05723SYOSHIFUJI Hideaki 	IPV6_SADDR_RULE_HOA,
966a9b05723SYOSHIFUJI Hideaki #endif
967a9b05723SYOSHIFUJI Hideaki 	IPV6_SADDR_RULE_OIF,
968a9b05723SYOSHIFUJI Hideaki 	IPV6_SADDR_RULE_LABEL,
969a9b05723SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_PRIVACY
970a9b05723SYOSHIFUJI Hideaki 	IPV6_SADDR_RULE_PRIVACY,
971a9b05723SYOSHIFUJI Hideaki #endif
972a9b05723SYOSHIFUJI Hideaki 	IPV6_SADDR_RULE_ORCHID,
973a9b05723SYOSHIFUJI Hideaki 	IPV6_SADDR_RULE_PREFIX,
974a9b05723SYOSHIFUJI Hideaki 	IPV6_SADDR_RULE_MAX
975072047e4SYOSHIFUJI Hideaki };
976072047e4SYOSHIFUJI Hideaki 
977a9b05723SYOSHIFUJI Hideaki struct ipv6_saddr_score {
978a9b05723SYOSHIFUJI Hideaki 	int			rule;
979a9b05723SYOSHIFUJI Hideaki 	int			addr_type;
980a9b05723SYOSHIFUJI Hideaki 	struct inet6_ifaddr	*ifa;
981a9b05723SYOSHIFUJI Hideaki 	DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX);
982a9b05723SYOSHIFUJI Hideaki 	int			scopedist;
983a9b05723SYOSHIFUJI Hideaki 	int			matchlen;
984a9b05723SYOSHIFUJI Hideaki };
985a9b05723SYOSHIFUJI Hideaki 
986a9b05723SYOSHIFUJI Hideaki struct ipv6_saddr_dst {
9879acd9f3aSYOSHIFUJI Hideaki 	const struct in6_addr *addr;
988a9b05723SYOSHIFUJI Hideaki 	int ifindex;
989a9b05723SYOSHIFUJI Hideaki 	int scope;
990a9b05723SYOSHIFUJI Hideaki 	int label;
9917cbca67cSYOSHIFUJI Hideaki 	unsigned int prefs;
992a9b05723SYOSHIFUJI Hideaki };
993072047e4SYOSHIFUJI Hideaki 
994b6f99a21SDave Jones static inline int ipv6_saddr_preferred(int type)
9951da177e4SLinus Torvalds {
99645bb0060SUlrich Weber 	if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK))
997072047e4SYOSHIFUJI Hideaki 		return 1;
998072047e4SYOSHIFUJI Hideaki 	return 0;
9991da177e4SLinus Torvalds }
10001da177e4SLinus Torvalds 
10013de23255SBenjamin Thery static int ipv6_get_saddr_eval(struct net *net,
10023de23255SBenjamin Thery 			       struct ipv6_saddr_score *score,
1003a9b05723SYOSHIFUJI Hideaki 			       struct ipv6_saddr_dst *dst,
1004a9b05723SYOSHIFUJI Hideaki 			       int i)
1005a9b05723SYOSHIFUJI Hideaki {
1006a9b05723SYOSHIFUJI Hideaki 	int ret;
1007a9b05723SYOSHIFUJI Hideaki 
1008a9b05723SYOSHIFUJI Hideaki 	if (i <= score->rule) {
1009a9b05723SYOSHIFUJI Hideaki 		switch (i) {
1010a9b05723SYOSHIFUJI Hideaki 		case IPV6_SADDR_RULE_SCOPE:
1011a9b05723SYOSHIFUJI Hideaki 			ret = score->scopedist;
1012a9b05723SYOSHIFUJI Hideaki 			break;
1013a9b05723SYOSHIFUJI Hideaki 		case IPV6_SADDR_RULE_PREFIX:
1014a9b05723SYOSHIFUJI Hideaki 			ret = score->matchlen;
1015a9b05723SYOSHIFUJI Hideaki 			break;
1016a9b05723SYOSHIFUJI Hideaki 		default:
1017a9b05723SYOSHIFUJI Hideaki 			ret = !!test_bit(i, score->scorebits);
1018a9b05723SYOSHIFUJI Hideaki 		}
1019a9b05723SYOSHIFUJI Hideaki 		goto out;
1020a9b05723SYOSHIFUJI Hideaki 	}
1021a9b05723SYOSHIFUJI Hideaki 
1022a9b05723SYOSHIFUJI Hideaki 	switch (i) {
1023a9b05723SYOSHIFUJI Hideaki 	case IPV6_SADDR_RULE_INIT:
1024a9b05723SYOSHIFUJI Hideaki 		/* Rule 0: remember if hiscore is not ready yet */
1025a9b05723SYOSHIFUJI Hideaki 		ret = !!score->ifa;
1026a9b05723SYOSHIFUJI Hideaki 		break;
1027a9b05723SYOSHIFUJI Hideaki 	case IPV6_SADDR_RULE_LOCAL:
1028a9b05723SYOSHIFUJI Hideaki 		/* Rule 1: Prefer same address */
1029a9b05723SYOSHIFUJI Hideaki 		ret = ipv6_addr_equal(&score->ifa->addr, dst->addr);
1030a9b05723SYOSHIFUJI Hideaki 		break;
1031a9b05723SYOSHIFUJI Hideaki 	case IPV6_SADDR_RULE_SCOPE:
1032a9b05723SYOSHIFUJI Hideaki 		/* Rule 2: Prefer appropriate scope
1033a9b05723SYOSHIFUJI Hideaki 		 *
1034a9b05723SYOSHIFUJI Hideaki 		 *      ret
1035a9b05723SYOSHIFUJI Hideaki 		 *       ^
1036a9b05723SYOSHIFUJI Hideaki 		 *    -1 |  d 15
1037a9b05723SYOSHIFUJI Hideaki 		 *    ---+--+-+---> scope
1038a9b05723SYOSHIFUJI Hideaki 		 *       |
1039a9b05723SYOSHIFUJI Hideaki 		 *       |             d is scope of the destination.
1040a9b05723SYOSHIFUJI Hideaki 		 *  B-d  |  \
1041a9b05723SYOSHIFUJI Hideaki 		 *       |   \      <- smaller scope is better if
1042a9b05723SYOSHIFUJI Hideaki 		 *  B-15 |    \        if scope is enough for destinaion.
1043a9b05723SYOSHIFUJI Hideaki 		 *       |             ret = B - scope (-1 <= scope >= d <= 15).
1044a9b05723SYOSHIFUJI Hideaki 		 * d-C-1 | /
1045a9b05723SYOSHIFUJI Hideaki 		 *       |/         <- greater is better
1046a9b05723SYOSHIFUJI Hideaki 		 *   -C  /             if scope is not enough for destination.
1047a9b05723SYOSHIFUJI Hideaki 		 *      /|             ret = scope - C (-1 <= d < scope <= 15).
1048a9b05723SYOSHIFUJI Hideaki 		 *
1049a9b05723SYOSHIFUJI Hideaki 		 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1050a9b05723SYOSHIFUJI Hideaki 		 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1051a9b05723SYOSHIFUJI Hideaki 		 * Assume B = 0 and we get C > 29.
1052a9b05723SYOSHIFUJI Hideaki 		 */
1053a9b05723SYOSHIFUJI Hideaki 		ret = __ipv6_addr_src_scope(score->addr_type);
1054a9b05723SYOSHIFUJI Hideaki 		if (ret >= dst->scope)
1055a9b05723SYOSHIFUJI Hideaki 			ret = -ret;
1056a9b05723SYOSHIFUJI Hideaki 		else
1057a9b05723SYOSHIFUJI Hideaki 			ret -= 128;	/* 30 is enough */
1058a9b05723SYOSHIFUJI Hideaki 		score->scopedist = ret;
1059a9b05723SYOSHIFUJI Hideaki 		break;
1060a9b05723SYOSHIFUJI Hideaki 	case IPV6_SADDR_RULE_PREFERRED:
1061a9b05723SYOSHIFUJI Hideaki 		/* Rule 3: Avoid deprecated and optimistic addresses */
1062a9b05723SYOSHIFUJI Hideaki 		ret = ipv6_saddr_preferred(score->addr_type) ||
1063a9b05723SYOSHIFUJI Hideaki 		      !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC));
1064a9b05723SYOSHIFUJI Hideaki 		break;
1065a9b05723SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_MIP6
1066a9b05723SYOSHIFUJI Hideaki 	case IPV6_SADDR_RULE_HOA:
10677cbca67cSYOSHIFUJI Hideaki 	    {
1068a9b05723SYOSHIFUJI Hideaki 		/* Rule 4: Prefer home address */
10697cbca67cSYOSHIFUJI Hideaki 		int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA);
10707cbca67cSYOSHIFUJI Hideaki 		ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome;
1071a9b05723SYOSHIFUJI Hideaki 		break;
10727cbca67cSYOSHIFUJI Hideaki 	    }
1073a9b05723SYOSHIFUJI Hideaki #endif
1074a9b05723SYOSHIFUJI Hideaki 	case IPV6_SADDR_RULE_OIF:
1075a9b05723SYOSHIFUJI Hideaki 		/* Rule 5: Prefer outgoing interface */
1076a9b05723SYOSHIFUJI Hideaki 		ret = (!dst->ifindex ||
1077a9b05723SYOSHIFUJI Hideaki 		       dst->ifindex == score->ifa->idev->dev->ifindex);
1078a9b05723SYOSHIFUJI Hideaki 		break;
1079a9b05723SYOSHIFUJI Hideaki 	case IPV6_SADDR_RULE_LABEL:
1080a9b05723SYOSHIFUJI Hideaki 		/* Rule 6: Prefer matching label */
10813de23255SBenjamin Thery 		ret = ipv6_addr_label(net,
10823de23255SBenjamin Thery 				      &score->ifa->addr, score->addr_type,
1083a9b05723SYOSHIFUJI Hideaki 				      score->ifa->idev->dev->ifindex) == dst->label;
1084a9b05723SYOSHIFUJI Hideaki 		break;
1085a9b05723SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_PRIVACY
1086a9b05723SYOSHIFUJI Hideaki 	case IPV6_SADDR_RULE_PRIVACY:
10877cbca67cSYOSHIFUJI Hideaki 	    {
1088a9b05723SYOSHIFUJI Hideaki 		/* Rule 7: Prefer public address
1089a9b05723SYOSHIFUJI Hideaki 		 * Note: prefer temprary address if use_tempaddr >= 2
1090a9b05723SYOSHIFUJI Hideaki 		 */
10917cbca67cSYOSHIFUJI Hideaki 		int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ?
10927cbca67cSYOSHIFUJI Hideaki 				!!(dst->prefs & IPV6_PREFER_SRC_TMP) :
10937cbca67cSYOSHIFUJI Hideaki 				score->ifa->idev->cnf.use_tempaddr >= 2;
10947cbca67cSYOSHIFUJI Hideaki 		ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp;
1095a9b05723SYOSHIFUJI Hideaki 		break;
10967cbca67cSYOSHIFUJI Hideaki 	    }
1097a9b05723SYOSHIFUJI Hideaki #endif
1098a9b05723SYOSHIFUJI Hideaki 	case IPV6_SADDR_RULE_ORCHID:
1099a9b05723SYOSHIFUJI Hideaki 		/* Rule 8-: Prefer ORCHID vs ORCHID or
1100a9b05723SYOSHIFUJI Hideaki 		 *	    non-ORCHID vs non-ORCHID
1101a9b05723SYOSHIFUJI Hideaki 		 */
1102a9b05723SYOSHIFUJI Hideaki 		ret = !(ipv6_addr_orchid(&score->ifa->addr) ^
1103a9b05723SYOSHIFUJI Hideaki 			ipv6_addr_orchid(dst->addr));
1104a9b05723SYOSHIFUJI Hideaki 		break;
1105a9b05723SYOSHIFUJI Hideaki 	case IPV6_SADDR_RULE_PREFIX:
1106a9b05723SYOSHIFUJI Hideaki 		/* Rule 8: Use longest matching prefix */
1107a9b05723SYOSHIFUJI Hideaki 		score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr,
1108a9b05723SYOSHIFUJI Hideaki 						       dst->addr);
1109a9b05723SYOSHIFUJI Hideaki 		break;
1110a9b05723SYOSHIFUJI Hideaki 	default:
1111a9b05723SYOSHIFUJI Hideaki 		ret = 0;
1112a9b05723SYOSHIFUJI Hideaki 	}
1113a9b05723SYOSHIFUJI Hideaki 
1114a9b05723SYOSHIFUJI Hideaki 	if (ret)
1115a9b05723SYOSHIFUJI Hideaki 		__set_bit(i, score->scorebits);
1116a9b05723SYOSHIFUJI Hideaki 	score->rule = i;
1117a9b05723SYOSHIFUJI Hideaki out:
1118a9b05723SYOSHIFUJI Hideaki 	return ret;
1119a9b05723SYOSHIFUJI Hideaki }
1120a9b05723SYOSHIFUJI Hideaki 
1121191cd582SBrian Haley int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev,
11229acd9f3aSYOSHIFUJI Hideaki 		       const struct in6_addr *daddr, unsigned int prefs,
11237cbca67cSYOSHIFUJI Hideaki 		       struct in6_addr *saddr)
11241da177e4SLinus Torvalds {
1125a9b05723SYOSHIFUJI Hideaki 	struct ipv6_saddr_score scores[2],
1126a9b05723SYOSHIFUJI Hideaki 				*score = &scores[0], *hiscore = &scores[1];
1127a9b05723SYOSHIFUJI Hideaki 	struct ipv6_saddr_dst dst;
1128072047e4SYOSHIFUJI Hideaki 	struct net_device *dev;
1129a9b05723SYOSHIFUJI Hideaki 	int dst_type;
11301da177e4SLinus Torvalds 
1131a9b05723SYOSHIFUJI Hideaki 	dst_type = __ipv6_addr_type(daddr);
1132a9b05723SYOSHIFUJI Hideaki 	dst.addr = daddr;
1133a9b05723SYOSHIFUJI Hideaki 	dst.ifindex = dst_dev ? dst_dev->ifindex : 0;
1134a9b05723SYOSHIFUJI Hideaki 	dst.scope = __ipv6_addr_src_scope(dst_type);
11353de23255SBenjamin Thery 	dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex);
11367cbca67cSYOSHIFUJI Hideaki 	dst.prefs = prefs;
1137a9b05723SYOSHIFUJI Hideaki 
1138a9b05723SYOSHIFUJI Hideaki 	hiscore->rule = -1;
1139a9b05723SYOSHIFUJI Hideaki 	hiscore->ifa = NULL;
11401da177e4SLinus Torvalds 
11418814c4b5SYOSHIFUJI Hideaki 	rcu_read_lock();
1142072047e4SYOSHIFUJI Hideaki 
1143c6d14c84SEric Dumazet 	for_each_netdev_rcu(net, dev) {
1144072047e4SYOSHIFUJI Hideaki 		struct inet6_dev *idev;
1145072047e4SYOSHIFUJI Hideaki 
1146a9b05723SYOSHIFUJI Hideaki 		/* Candidate Source Address (section 4)
1147072047e4SYOSHIFUJI Hideaki 		 *  - multicast and link-local destination address,
1148072047e4SYOSHIFUJI Hideaki 		 *    the set of candidate source address MUST only
1149072047e4SYOSHIFUJI Hideaki 		 *    include addresses assigned to interfaces
1150072047e4SYOSHIFUJI Hideaki 		 *    belonging to the same link as the outgoing
1151072047e4SYOSHIFUJI Hideaki 		 *    interface.
1152072047e4SYOSHIFUJI Hideaki 		 * (- For site-local destination addresses, the
1153072047e4SYOSHIFUJI Hideaki 		 *    set of candidate source addresses MUST only
1154072047e4SYOSHIFUJI Hideaki 		 *    include addresses assigned to interfaces
1155072047e4SYOSHIFUJI Hideaki 		 *    belonging to the same site as the outgoing
1156072047e4SYOSHIFUJI Hideaki 		 *    interface.)
1157072047e4SYOSHIFUJI Hideaki 		 */
1158a9b05723SYOSHIFUJI Hideaki 		if (((dst_type & IPV6_ADDR_MULTICAST) ||
1159a9b05723SYOSHIFUJI Hideaki 		     dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
1160a9b05723SYOSHIFUJI Hideaki 		    dst.ifindex && dev->ifindex != dst.ifindex)
1161072047e4SYOSHIFUJI Hideaki 			continue;
1162072047e4SYOSHIFUJI Hideaki 
11631da177e4SLinus Torvalds 		idev = __in6_dev_get(dev);
1164072047e4SYOSHIFUJI Hideaki 		if (!idev)
1165072047e4SYOSHIFUJI Hideaki 			continue;
1166072047e4SYOSHIFUJI Hideaki 
11671da177e4SLinus Torvalds 		read_lock_bh(&idev->lock);
1168502a2ffdSstephen hemminger 		list_for_each_entry(score->ifa, &idev->addr_list, if_list) {
1169a9b05723SYOSHIFUJI Hideaki 			int i;
1170072047e4SYOSHIFUJI Hideaki 
1171a9b05723SYOSHIFUJI Hideaki 			/*
11726b3ae80aSYOSHIFUJI Hideaki 			 * - Tentative Address (RFC2462 section 5.4)
11736b3ae80aSYOSHIFUJI Hideaki 			 *  - A tentative address is not considered
11746b3ae80aSYOSHIFUJI Hideaki 			 *    "assigned to an interface" in the traditional
117595c385b4SNeil Horman 			 *    sense, unless it is also flagged as optimistic.
11766b3ae80aSYOSHIFUJI Hideaki 			 * - Candidate Source Address (section 4)
1177072047e4SYOSHIFUJI Hideaki 			 *  - In any case, anycast addresses, multicast
1178072047e4SYOSHIFUJI Hideaki 			 *    addresses, and the unspecified address MUST
1179072047e4SYOSHIFUJI Hideaki 			 *    NOT be included in a candidate set.
1180072047e4SYOSHIFUJI Hideaki 			 */
1181a9b05723SYOSHIFUJI Hideaki 			if ((score->ifa->flags & IFA_F_TENTATIVE) &&
1182a9b05723SYOSHIFUJI Hideaki 			    (!(score->ifa->flags & IFA_F_OPTIMISTIC)))
11836b3ae80aSYOSHIFUJI Hideaki 				continue;
1184a9b05723SYOSHIFUJI Hideaki 
1185a9b05723SYOSHIFUJI Hideaki 			score->addr_type = __ipv6_addr_type(&score->ifa->addr);
1186a9b05723SYOSHIFUJI Hideaki 
1187a9b05723SYOSHIFUJI Hideaki 			if (unlikely(score->addr_type == IPV6_ADDR_ANY ||
1188a9b05723SYOSHIFUJI Hideaki 				     score->addr_type & IPV6_ADDR_MULTICAST)) {
1189072047e4SYOSHIFUJI Hideaki 				LIMIT_NETDEBUG(KERN_DEBUG
1190072047e4SYOSHIFUJI Hideaki 					       "ADDRCONF: unspecified / multicast address "
1191072047e4SYOSHIFUJI Hideaki 					       "assigned as unicast address on %s",
1192072047e4SYOSHIFUJI Hideaki 					       dev->name);
11931da177e4SLinus Torvalds 				continue;
1194072047e4SYOSHIFUJI Hideaki 			}
1195072047e4SYOSHIFUJI Hideaki 
1196a9b05723SYOSHIFUJI Hideaki 			score->rule = -1;
1197a9b05723SYOSHIFUJI Hideaki 			bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX);
1198072047e4SYOSHIFUJI Hideaki 
1199a9b05723SYOSHIFUJI Hideaki 			for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) {
1200a9b05723SYOSHIFUJI Hideaki 				int minihiscore, miniscore;
1201072047e4SYOSHIFUJI Hideaki 
12023de23255SBenjamin Thery 				minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i);
12033de23255SBenjamin Thery 				miniscore = ipv6_get_saddr_eval(net, score, &dst, i);
1204072047e4SYOSHIFUJI Hideaki 
1205a9b05723SYOSHIFUJI Hideaki 				if (minihiscore > miniscore) {
1206a9b05723SYOSHIFUJI Hideaki 					if (i == IPV6_SADDR_RULE_SCOPE &&
1207a9b05723SYOSHIFUJI Hideaki 					    score->scopedist > 0) {
1208a9b05723SYOSHIFUJI Hideaki 						/*
1209a9b05723SYOSHIFUJI Hideaki 						 * special case:
1210a9b05723SYOSHIFUJI Hideaki 						 * each remaining entry
1211a9b05723SYOSHIFUJI Hideaki 						 * has too small (not enough)
1212a9b05723SYOSHIFUJI Hideaki 						 * scope, because ifa entries
1213a9b05723SYOSHIFUJI Hideaki 						 * are sorted by their scope
1214a9b05723SYOSHIFUJI Hideaki 						 * values.
1215072047e4SYOSHIFUJI Hideaki 						 */
1216a9b05723SYOSHIFUJI Hideaki 						goto try_nextdev;
1217072047e4SYOSHIFUJI Hideaki 					}
1218a9b05723SYOSHIFUJI Hideaki 					break;
1219a9b05723SYOSHIFUJI Hideaki 				} else if (minihiscore < miniscore) {
1220a9b05723SYOSHIFUJI Hideaki 					if (hiscore->ifa)
1221a9b05723SYOSHIFUJI Hideaki 						in6_ifa_put(hiscore->ifa);
122299cd07a5SJuha-Matti Tapio 
1223a9b05723SYOSHIFUJI Hideaki 					in6_ifa_hold(score->ifa);
1224072047e4SYOSHIFUJI Hideaki 
1225a0bffffcSIlpo Järvinen 					swap(hiscore, score);
1226a9b05723SYOSHIFUJI Hideaki 
1227a9b05723SYOSHIFUJI Hideaki 					/* restore our iterator */
1228a9b05723SYOSHIFUJI Hideaki 					score->ifa = hiscore->ifa;
1229a9b05723SYOSHIFUJI Hideaki 
1230a9b05723SYOSHIFUJI Hideaki 					break;
12311da177e4SLinus Torvalds 				}
1232a9b05723SYOSHIFUJI Hideaki 			}
1233a9b05723SYOSHIFUJI Hideaki 		}
1234a9b05723SYOSHIFUJI Hideaki try_nextdev:
12351da177e4SLinus Torvalds 		read_unlock_bh(&idev->lock);
12361da177e4SLinus Torvalds 	}
12378814c4b5SYOSHIFUJI Hideaki 	rcu_read_unlock();
12381da177e4SLinus Torvalds 
1239a9b05723SYOSHIFUJI Hideaki 	if (!hiscore->ifa)
1240072047e4SYOSHIFUJI Hideaki 		return -EADDRNOTAVAIL;
12411da177e4SLinus Torvalds 
1242a9b05723SYOSHIFUJI Hideaki 	ipv6_addr_copy(saddr, &hiscore->ifa->addr);
1243a9b05723SYOSHIFUJI Hideaki 	in6_ifa_put(hiscore->ifa);
1244072047e4SYOSHIFUJI Hideaki 	return 0;
12451da177e4SLinus Torvalds }
12465e5f3f0fSYOSHIFUJI Hideaki EXPORT_SYMBOL(ipv6_dev_get_saddr);
12471da177e4SLinus Torvalds 
124895c385b4SNeil Horman int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
124995c385b4SNeil Horman 		    unsigned char banned_flags)
12501da177e4SLinus Torvalds {
12511da177e4SLinus Torvalds 	struct inet6_dev *idev;
12521da177e4SLinus Torvalds 	int err = -EADDRNOTAVAIL;
12531da177e4SLinus Torvalds 
12548814c4b5SYOSHIFUJI Hideaki 	rcu_read_lock();
1255e21e8467SStephen Hemminger 	idev = __in6_dev_get(dev);
1256e21e8467SStephen Hemminger 	if (idev) {
12571da177e4SLinus Torvalds 		struct inet6_ifaddr *ifp;
12581da177e4SLinus Torvalds 
12591da177e4SLinus Torvalds 		read_lock_bh(&idev->lock);
1260502a2ffdSstephen hemminger 		list_for_each_entry(ifp, &idev->addr_list, if_list) {
1261502a2ffdSstephen hemminger 			if (ifp->scope == IFA_LINK &&
1262502a2ffdSstephen hemminger 			    !(ifp->flags & banned_flags)) {
12631da177e4SLinus Torvalds 				ipv6_addr_copy(addr, &ifp->addr);
12641da177e4SLinus Torvalds 				err = 0;
12651da177e4SLinus Torvalds 				break;
12661da177e4SLinus Torvalds 			}
12671da177e4SLinus Torvalds 		}
12681da177e4SLinus Torvalds 		read_unlock_bh(&idev->lock);
12691da177e4SLinus Torvalds 	}
12708814c4b5SYOSHIFUJI Hideaki 	rcu_read_unlock();
12711da177e4SLinus Torvalds 	return err;
12721da177e4SLinus Torvalds }
12731da177e4SLinus Torvalds 
12741da177e4SLinus Torvalds static int ipv6_count_addresses(struct inet6_dev *idev)
12751da177e4SLinus Torvalds {
12761da177e4SLinus Torvalds 	int cnt = 0;
12771da177e4SLinus Torvalds 	struct inet6_ifaddr *ifp;
12781da177e4SLinus Torvalds 
12791da177e4SLinus Torvalds 	read_lock_bh(&idev->lock);
1280502a2ffdSstephen hemminger 	list_for_each_entry(ifp, &idev->addr_list, if_list)
12811da177e4SLinus Torvalds 		cnt++;
12821da177e4SLinus Torvalds 	read_unlock_bh(&idev->lock);
12831da177e4SLinus Torvalds 	return cnt;
12841da177e4SLinus Torvalds }
12851da177e4SLinus Torvalds 
1286bfeade08SDaniel Lezcano int ipv6_chk_addr(struct net *net, struct in6_addr *addr,
1287bfeade08SDaniel Lezcano 		  struct net_device *dev, int strict)
12881da177e4SLinus Torvalds {
1289eedf042aSStephen Hemminger 	struct inet6_ifaddr *ifp;
1290c2e21293Sstephen hemminger 	struct hlist_node *node;
12913a88a81dSstephen hemminger 	unsigned int hash = ipv6_addr_hash(addr);
12921da177e4SLinus Torvalds 
12935c578aedSstephen hemminger 	rcu_read_lock_bh();
12945c578aedSstephen hemminger 	hlist_for_each_entry_rcu(ifp, node, &inet6_addr_lst[hash], addr_lst) {
1295878628fbSYOSHIFUJI Hideaki 		if (!net_eq(dev_net(ifp->idev->dev), net))
1296bfeade08SDaniel Lezcano 			continue;
12971da177e4SLinus Torvalds 		if (ipv6_addr_equal(&ifp->addr, addr) &&
1298eedf042aSStephen Hemminger 		    !(ifp->flags&IFA_F_TENTATIVE) &&
1299eedf042aSStephen Hemminger 		    (dev == NULL || ifp->idev->dev == dev ||
1300eedf042aSStephen Hemminger 		     !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) {
13015c578aedSstephen hemminger 			rcu_read_unlock_bh();
1302eedf042aSStephen Hemminger 			return 1;
1303eedf042aSStephen Hemminger 		}
1304eedf042aSStephen Hemminger 	}
13055c578aedSstephen hemminger 
1306eedf042aSStephen Hemminger 	rcu_read_unlock_bh();
1307eedf042aSStephen Hemminger 	return 0;
13081da177e4SLinus Torvalds }
13097159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(ipv6_chk_addr);
13107159039aSYOSHIFUJI Hideaki 
13113e81c6daSDavid S. Miller static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
131206bfe655SDaniel Lezcano 			       struct net_device *dev)
13131da177e4SLinus Torvalds {
13143e81c6daSDavid S. Miller 	unsigned int hash = ipv6_addr_hash(addr);
13151da177e4SLinus Torvalds 	struct inet6_ifaddr *ifp;
1316c2e21293Sstephen hemminger 	struct hlist_node *node;
13171da177e4SLinus Torvalds 
1318c2e21293Sstephen hemminger 	hlist_for_each_entry(ifp, node, &inet6_addr_lst[hash], addr_lst) {
1319878628fbSYOSHIFUJI Hideaki 		if (!net_eq(dev_net(ifp->idev->dev), net))
132006bfe655SDaniel Lezcano 			continue;
13211da177e4SLinus Torvalds 		if (ipv6_addr_equal(&ifp->addr, addr)) {
13221da177e4SLinus Torvalds 			if (dev == NULL || ifp->idev->dev == dev)
13233e81c6daSDavid S. Miller 				return true;
13241da177e4SLinus Torvalds 		}
13251da177e4SLinus Torvalds 	}
13263e81c6daSDavid S. Miller 	return false;
13271da177e4SLinus Torvalds }
13281da177e4SLinus Torvalds 
132952eeeb84SYOSHIFUJI Hideaki int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev)
133052eeeb84SYOSHIFUJI Hideaki {
133152eeeb84SYOSHIFUJI Hideaki 	struct inet6_dev *idev;
133252eeeb84SYOSHIFUJI Hideaki 	struct inet6_ifaddr *ifa;
133352eeeb84SYOSHIFUJI Hideaki 	int	onlink;
133452eeeb84SYOSHIFUJI Hideaki 
133552eeeb84SYOSHIFUJI Hideaki 	onlink = 0;
133652eeeb84SYOSHIFUJI Hideaki 	rcu_read_lock();
133752eeeb84SYOSHIFUJI Hideaki 	idev = __in6_dev_get(dev);
133852eeeb84SYOSHIFUJI Hideaki 	if (idev) {
133952eeeb84SYOSHIFUJI Hideaki 		read_lock_bh(&idev->lock);
1340502a2ffdSstephen hemminger 		list_for_each_entry(ifa, &idev->addr_list, if_list) {
134152eeeb84SYOSHIFUJI Hideaki 			onlink = ipv6_prefix_equal(addr, &ifa->addr,
134252eeeb84SYOSHIFUJI Hideaki 						   ifa->prefix_len);
134352eeeb84SYOSHIFUJI Hideaki 			if (onlink)
134452eeeb84SYOSHIFUJI Hideaki 				break;
134552eeeb84SYOSHIFUJI Hideaki 		}
134652eeeb84SYOSHIFUJI Hideaki 		read_unlock_bh(&idev->lock);
134752eeeb84SYOSHIFUJI Hideaki 	}
134852eeeb84SYOSHIFUJI Hideaki 	rcu_read_unlock();
134952eeeb84SYOSHIFUJI Hideaki 	return onlink;
135052eeeb84SYOSHIFUJI Hideaki }
135152eeeb84SYOSHIFUJI Hideaki 
135252eeeb84SYOSHIFUJI Hideaki EXPORT_SYMBOL(ipv6_chk_prefix);
135352eeeb84SYOSHIFUJI Hideaki 
13549acd9f3aSYOSHIFUJI Hideaki struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr,
13551cab3da6SDaniel Lezcano 				     struct net_device *dev, int strict)
13561da177e4SLinus Torvalds {
1357b79d1d54SDavid S. Miller 	struct inet6_ifaddr *ifp, *result = NULL;
13583a88a81dSstephen hemminger 	unsigned int hash = ipv6_addr_hash(addr);
1359b79d1d54SDavid S. Miller 	struct hlist_node *node;
13601da177e4SLinus Torvalds 
13615c578aedSstephen hemminger 	rcu_read_lock_bh();
13624f70eccaSEric Dumazet 	hlist_for_each_entry_rcu_bh(ifp, node, &inet6_addr_lst[hash], addr_lst) {
1363878628fbSYOSHIFUJI Hideaki 		if (!net_eq(dev_net(ifp->idev->dev), net))
13641cab3da6SDaniel Lezcano 			continue;
13651da177e4SLinus Torvalds 		if (ipv6_addr_equal(&ifp->addr, addr)) {
13661da177e4SLinus Torvalds 			if (dev == NULL || ifp->idev->dev == dev ||
13671da177e4SLinus Torvalds 			    !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1368b79d1d54SDavid S. Miller 				result = ifp;
13691da177e4SLinus Torvalds 				in6_ifa_hold(ifp);
13701da177e4SLinus Torvalds 				break;
13711da177e4SLinus Torvalds 			}
13721da177e4SLinus Torvalds 		}
13731da177e4SLinus Torvalds 	}
13745c578aedSstephen hemminger 	rcu_read_unlock_bh();
13751da177e4SLinus Torvalds 
1376b79d1d54SDavid S. Miller 	return result;
13771da177e4SLinus Torvalds }
13781da177e4SLinus Torvalds 
13791da177e4SLinus Torvalds /* Gets referenced address, destroys ifaddr */
13801da177e4SLinus Torvalds 
1381cc411d0bSBrian Haley static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed)
13821da177e4SLinus Torvalds {
13831da177e4SLinus Torvalds 	if (ifp->flags&IFA_F_PERMANENT) {
13841da177e4SLinus Torvalds 		spin_lock_bh(&ifp->lock);
13851da177e4SLinus Torvalds 		addrconf_del_timer(ifp);
13861da177e4SLinus Torvalds 		ifp->flags |= IFA_F_TENTATIVE;
1387cc411d0bSBrian Haley 		if (dad_failed)
1388cc411d0bSBrian Haley 			ifp->flags |= IFA_F_DADFAILED;
13891da177e4SLinus Torvalds 		spin_unlock_bh(&ifp->lock);
1390e2577a06SHerbert Xu 		if (dad_failed)
1391e2577a06SHerbert Xu 			ipv6_ifa_notify(0, ifp);
13921da177e4SLinus Torvalds 		in6_ifa_put(ifp);
13931da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY
13941da177e4SLinus Torvalds 	} else if (ifp->flags&IFA_F_TEMPORARY) {
13951da177e4SLinus Torvalds 		struct inet6_ifaddr *ifpub;
13961da177e4SLinus Torvalds 		spin_lock_bh(&ifp->lock);
13971da177e4SLinus Torvalds 		ifpub = ifp->ifpub;
13981da177e4SLinus Torvalds 		if (ifpub) {
13991da177e4SLinus Torvalds 			in6_ifa_hold(ifpub);
14001da177e4SLinus Torvalds 			spin_unlock_bh(&ifp->lock);
14011da177e4SLinus Torvalds 			ipv6_create_tempaddr(ifpub, ifp);
14021da177e4SLinus Torvalds 			in6_ifa_put(ifpub);
14031da177e4SLinus Torvalds 		} else {
14041da177e4SLinus Torvalds 			spin_unlock_bh(&ifp->lock);
14051da177e4SLinus Torvalds 		}
14061da177e4SLinus Torvalds 		ipv6_del_addr(ifp);
14071da177e4SLinus Torvalds #endif
14081da177e4SLinus Torvalds 	} else
14091da177e4SLinus Torvalds 		ipv6_del_addr(ifp);
14101da177e4SLinus Torvalds }
14111da177e4SLinus Torvalds 
1412f2344a13SHerbert Xu static int addrconf_dad_end(struct inet6_ifaddr *ifp)
1413f2344a13SHerbert Xu {
1414f2344a13SHerbert Xu 	int err = -ENOENT;
1415f2344a13SHerbert Xu 
1416f2344a13SHerbert Xu 	spin_lock(&ifp->state_lock);
1417f2344a13SHerbert Xu 	if (ifp->state == INET6_IFADDR_STATE_DAD) {
1418f2344a13SHerbert Xu 		ifp->state = INET6_IFADDR_STATE_POSTDAD;
1419f2344a13SHerbert Xu 		err = 0;
1420f2344a13SHerbert Xu 	}
1421f2344a13SHerbert Xu 	spin_unlock(&ifp->state_lock);
1422f2344a13SHerbert Xu 
1423f2344a13SHerbert Xu 	return err;
1424f2344a13SHerbert Xu }
1425f2344a13SHerbert Xu 
14263c21edbdSYOSHIFUJI Hideaki void addrconf_dad_failure(struct inet6_ifaddr *ifp)
14273c21edbdSYOSHIFUJI Hideaki {
14281b34be74SYOSHIFUJI Hideaki 	struct inet6_dev *idev = ifp->idev;
14299bdd8d40SBrian Haley 
1430*853dc2e0SUrsula Braun 	if (addrconf_dad_end(ifp)) {
1431*853dc2e0SUrsula Braun 		in6_ifa_put(ifp);
1432f2344a13SHerbert Xu 		return;
1433*853dc2e0SUrsula Braun 	}
1434f2344a13SHerbert Xu 
14359bdd8d40SBrian Haley 	if (net_ratelimit())
14360522fea6SJens Rosenboom 		printk(KERN_INFO "%s: IPv6 duplicate address %pI6c detected!\n",
14370522fea6SJens Rosenboom 			ifp->idev->dev->name, &ifp->addr);
14389bdd8d40SBrian Haley 
14391b34be74SYOSHIFUJI Hideaki 	if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) {
14401b34be74SYOSHIFUJI Hideaki 		struct in6_addr addr;
14411b34be74SYOSHIFUJI Hideaki 
14421b34be74SYOSHIFUJI Hideaki 		addr.s6_addr32[0] = htonl(0xfe800000);
14431b34be74SYOSHIFUJI Hideaki 		addr.s6_addr32[1] = 0;
14441b34be74SYOSHIFUJI Hideaki 
14451b34be74SYOSHIFUJI Hideaki 		if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) &&
14461b34be74SYOSHIFUJI Hideaki 		    ipv6_addr_equal(&ifp->addr, &addr)) {
14471b34be74SYOSHIFUJI Hideaki 			/* DAD failed for link-local based on MAC address */
14481b34be74SYOSHIFUJI Hideaki 			idev->cnf.disable_ipv6 = 1;
14499bdd8d40SBrian Haley 
14509bdd8d40SBrian Haley 			printk(KERN_INFO "%s: IPv6 being disabled!\n",
14519bdd8d40SBrian Haley 				ifp->idev->dev->name);
14521b34be74SYOSHIFUJI Hideaki 		}
14531b34be74SYOSHIFUJI Hideaki 	}
14541b34be74SYOSHIFUJI Hideaki 
1455cc411d0bSBrian Haley 	addrconf_dad_stop(ifp, 1);
14563c21edbdSYOSHIFUJI Hideaki }
14571da177e4SLinus Torvalds 
14581da177e4SLinus Torvalds /* Join to solicited addr multicast group. */
14591da177e4SLinus Torvalds 
14601da177e4SLinus Torvalds void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
14611da177e4SLinus Torvalds {
14621da177e4SLinus Torvalds 	struct in6_addr maddr;
14631da177e4SLinus Torvalds 
14641da177e4SLinus Torvalds 	if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
14651da177e4SLinus Torvalds 		return;
14661da177e4SLinus Torvalds 
14671da177e4SLinus Torvalds 	addrconf_addr_solict_mult(addr, &maddr);
14681da177e4SLinus Torvalds 	ipv6_dev_mc_inc(dev, &maddr);
14691da177e4SLinus Torvalds }
14701da177e4SLinus Torvalds 
14711da177e4SLinus Torvalds void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
14721da177e4SLinus Torvalds {
14731da177e4SLinus Torvalds 	struct in6_addr maddr;
14741da177e4SLinus Torvalds 
14751da177e4SLinus Torvalds 	if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
14761da177e4SLinus Torvalds 		return;
14771da177e4SLinus Torvalds 
14781da177e4SLinus Torvalds 	addrconf_addr_solict_mult(addr, &maddr);
14791da177e4SLinus Torvalds 	__ipv6_dev_mc_dec(idev, &maddr);
14801da177e4SLinus Torvalds }
14811da177e4SLinus Torvalds 
148220380731SArnaldo Carvalho de Melo static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
14831da177e4SLinus Torvalds {
14841da177e4SLinus Torvalds 	struct in6_addr addr;
14851da177e4SLinus Torvalds 	ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
14861da177e4SLinus Torvalds 	if (ipv6_addr_any(&addr))
14871da177e4SLinus Torvalds 		return;
14881da177e4SLinus Torvalds 	ipv6_dev_ac_inc(ifp->idev->dev, &addr);
14891da177e4SLinus Torvalds }
14901da177e4SLinus Torvalds 
149120380731SArnaldo Carvalho de Melo static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
14921da177e4SLinus Torvalds {
14931da177e4SLinus Torvalds 	struct in6_addr addr;
14941da177e4SLinus Torvalds 	ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
14951da177e4SLinus Torvalds 	if (ipv6_addr_any(&addr))
14961da177e4SLinus Torvalds 		return;
14971da177e4SLinus Torvalds 	__ipv6_dev_ac_dec(ifp->idev, &addr);
14981da177e4SLinus Torvalds }
14991da177e4SLinus Torvalds 
1500073a8e0eSYOSHIFUJI Hideaki static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
15011da177e4SLinus Torvalds {
15021da177e4SLinus Torvalds 	if (dev->addr_len != ETH_ALEN)
15031da177e4SLinus Torvalds 		return -1;
15041da177e4SLinus Torvalds 	memcpy(eui, dev->dev_addr, 3);
15051da177e4SLinus Torvalds 	memcpy(eui + 5, dev->dev_addr + 3, 3);
15061da177e4SLinus Torvalds 
15071da177e4SLinus Torvalds 	/*
15081da177e4SLinus Torvalds 	 * The zSeries OSA network cards can be shared among various
15091da177e4SLinus Torvalds 	 * OS instances, but the OSA cards have only one MAC address.
15101da177e4SLinus Torvalds 	 * This leads to duplicate address conflicts in conjunction
15111da177e4SLinus Torvalds 	 * with IPv6 if more than one instance uses the same card.
15121da177e4SLinus Torvalds 	 *
15131da177e4SLinus Torvalds 	 * The driver for these cards can deliver a unique 16-bit
15141da177e4SLinus Torvalds 	 * identifier for each instance sharing the same card.  It is
15151da177e4SLinus Torvalds 	 * placed instead of 0xFFFE in the interface identifier.  The
15161da177e4SLinus Torvalds 	 * "u" bit of the interface identifier is not inverted in this
15171da177e4SLinus Torvalds 	 * case.  Hence the resulting interface identifier has local
15181da177e4SLinus Torvalds 	 * scope according to RFC2373.
15191da177e4SLinus Torvalds 	 */
15201da177e4SLinus Torvalds 	if (dev->dev_id) {
15211da177e4SLinus Torvalds 		eui[3] = (dev->dev_id >> 8) & 0xFF;
15221da177e4SLinus Torvalds 		eui[4] = dev->dev_id & 0xFF;
15231da177e4SLinus Torvalds 	} else {
15241da177e4SLinus Torvalds 		eui[3] = 0xFF;
15251da177e4SLinus Torvalds 		eui[4] = 0xFE;
15261da177e4SLinus Torvalds 		eui[0] ^= 2;
15271da177e4SLinus Torvalds 	}
15281da177e4SLinus Torvalds 	return 0;
1529073a8e0eSYOSHIFUJI Hideaki }
1530073a8e0eSYOSHIFUJI Hideaki 
1531073a8e0eSYOSHIFUJI Hideaki static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1532073a8e0eSYOSHIFUJI Hideaki {
15331da177e4SLinus Torvalds 	/* XXX: inherit EUI-64 from other interface -- yoshfuji */
15341da177e4SLinus Torvalds 	if (dev->addr_len != ARCNET_ALEN)
15351da177e4SLinus Torvalds 		return -1;
15361da177e4SLinus Torvalds 	memset(eui, 0, 7);
15371da177e4SLinus Torvalds 	eui[7] = *(u8*)dev->dev_addr;
15381da177e4SLinus Torvalds 	return 0;
1539073a8e0eSYOSHIFUJI Hideaki }
1540073a8e0eSYOSHIFUJI Hideaki 
1541073a8e0eSYOSHIFUJI Hideaki static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1542073a8e0eSYOSHIFUJI Hideaki {
15431da177e4SLinus Torvalds 	if (dev->addr_len != INFINIBAND_ALEN)
15441da177e4SLinus Torvalds 		return -1;
15451da177e4SLinus Torvalds 	memcpy(eui, dev->dev_addr + 12, 8);
15461da177e4SLinus Torvalds 	eui[0] |= 2;
15471da177e4SLinus Torvalds 	return 0;
15481da177e4SLinus Torvalds }
1549073a8e0eSYOSHIFUJI Hideaki 
1550c61393eaSstephen hemminger static int __ipv6_isatap_ifid(u8 *eui, __be32 addr)
1551dfd982baSYOSHIFUJI Hideaki {
15529af28511SSascha Hlusiak 	if (addr == 0)
15539af28511SSascha Hlusiak 		return -1;
1554dfd982baSYOSHIFUJI Hideaki 	eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
1555dfd982baSYOSHIFUJI Hideaki 		  ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
1556dfd982baSYOSHIFUJI Hideaki 		  ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
1557dfd982baSYOSHIFUJI Hideaki 		  ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
1558dfd982baSYOSHIFUJI Hideaki 		  ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
1559dfd982baSYOSHIFUJI Hideaki 		  ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
1560dfd982baSYOSHIFUJI Hideaki 	eui[1] = 0;
1561dfd982baSYOSHIFUJI Hideaki 	eui[2] = 0x5E;
1562dfd982baSYOSHIFUJI Hideaki 	eui[3] = 0xFE;
1563dfd982baSYOSHIFUJI Hideaki 	memcpy(eui + 4, &addr, 4);
1564dfd982baSYOSHIFUJI Hideaki 	return 0;
1565dfd982baSYOSHIFUJI Hideaki }
1566dfd982baSYOSHIFUJI Hideaki 
1567dfd982baSYOSHIFUJI Hideaki static int addrconf_ifid_sit(u8 *eui, struct net_device *dev)
1568dfd982baSYOSHIFUJI Hideaki {
1569dfd982baSYOSHIFUJI Hideaki 	if (dev->priv_flags & IFF_ISATAP)
1570dfd982baSYOSHIFUJI Hideaki 		return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
1571dfd982baSYOSHIFUJI Hideaki 	return -1;
1572dfd982baSYOSHIFUJI Hideaki }
1573dfd982baSYOSHIFUJI Hideaki 
1574073a8e0eSYOSHIFUJI Hideaki static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1575073a8e0eSYOSHIFUJI Hideaki {
1576073a8e0eSYOSHIFUJI Hideaki 	switch (dev->type) {
1577073a8e0eSYOSHIFUJI Hideaki 	case ARPHRD_ETHER:
1578073a8e0eSYOSHIFUJI Hideaki 	case ARPHRD_FDDI:
1579073a8e0eSYOSHIFUJI Hideaki 	case ARPHRD_IEEE802_TR:
1580073a8e0eSYOSHIFUJI Hideaki 		return addrconf_ifid_eui48(eui, dev);
1581073a8e0eSYOSHIFUJI Hideaki 	case ARPHRD_ARCNET:
1582073a8e0eSYOSHIFUJI Hideaki 		return addrconf_ifid_arcnet(eui, dev);
1583073a8e0eSYOSHIFUJI Hideaki 	case ARPHRD_INFINIBAND:
1584073a8e0eSYOSHIFUJI Hideaki 		return addrconf_ifid_infiniband(eui, dev);
1585c7dc89c0SFred L. Templin 	case ARPHRD_SIT:
1586dfd982baSYOSHIFUJI Hideaki 		return addrconf_ifid_sit(eui, dev);
1587073a8e0eSYOSHIFUJI Hideaki 	}
15881da177e4SLinus Torvalds 	return -1;
15891da177e4SLinus Torvalds }
15901da177e4SLinus Torvalds 
15911da177e4SLinus Torvalds static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
15921da177e4SLinus Torvalds {
15931da177e4SLinus Torvalds 	int err = -1;
15941da177e4SLinus Torvalds 	struct inet6_ifaddr *ifp;
15951da177e4SLinus Torvalds 
15961da177e4SLinus Torvalds 	read_lock_bh(&idev->lock);
1597502a2ffdSstephen hemminger 	list_for_each_entry(ifp, &idev->addr_list, if_list) {
15981da177e4SLinus Torvalds 		if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
15991da177e4SLinus Torvalds 			memcpy(eui, ifp->addr.s6_addr+8, 8);
16001da177e4SLinus Torvalds 			err = 0;
16011da177e4SLinus Torvalds 			break;
16021da177e4SLinus Torvalds 		}
16031da177e4SLinus Torvalds 	}
16041da177e4SLinus Torvalds 	read_unlock_bh(&idev->lock);
16051da177e4SLinus Torvalds 	return err;
16061da177e4SLinus Torvalds }
16071da177e4SLinus Torvalds 
16081da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY
16091da177e4SLinus Torvalds /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
16101da177e4SLinus Torvalds static int __ipv6_regen_rndid(struct inet6_dev *idev)
16111da177e4SLinus Torvalds {
16121da177e4SLinus Torvalds regen:
1613955189efSYOSHIFUJI Hideaki 	get_random_bytes(idev->rndid, sizeof(idev->rndid));
16141da177e4SLinus Torvalds 	idev->rndid[0] &= ~0x02;
16151da177e4SLinus Torvalds 
16161da177e4SLinus Torvalds 	/*
16171da177e4SLinus Torvalds 	 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
16181da177e4SLinus Torvalds 	 * check if generated address is not inappropriate
16191da177e4SLinus Torvalds 	 *
16201da177e4SLinus Torvalds 	 *  - Reserved subnet anycast (RFC 2526)
16211da177e4SLinus Torvalds 	 *	11111101 11....11 1xxxxxxx
1622c7dc89c0SFred L. Templin 	 *  - ISATAP (RFC4214) 6.1
16231da177e4SLinus Torvalds 	 *	00-00-5E-FE-xx-xx-xx-xx
16241da177e4SLinus Torvalds 	 *  - value 0
16251da177e4SLinus Torvalds 	 *  - XXX: already assigned to an address on the device
16261da177e4SLinus Torvalds 	 */
16271da177e4SLinus Torvalds 	if (idev->rndid[0] == 0xfd &&
16281da177e4SLinus Torvalds 	    (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
16291da177e4SLinus Torvalds 	    (idev->rndid[7]&0x80))
16301da177e4SLinus Torvalds 		goto regen;
16311da177e4SLinus Torvalds 	if ((idev->rndid[0]|idev->rndid[1]) == 0) {
16321da177e4SLinus Torvalds 		if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
16331da177e4SLinus Torvalds 			goto regen;
16341da177e4SLinus Torvalds 		if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
16351da177e4SLinus Torvalds 			goto regen;
16361da177e4SLinus Torvalds 	}
16371da177e4SLinus Torvalds 
16381da177e4SLinus Torvalds 	return 0;
16391da177e4SLinus Torvalds }
16401da177e4SLinus Torvalds 
16411da177e4SLinus Torvalds static void ipv6_regen_rndid(unsigned long data)
16421da177e4SLinus Torvalds {
16431da177e4SLinus Torvalds 	struct inet6_dev *idev = (struct inet6_dev *) data;
16441da177e4SLinus Torvalds 	unsigned long expires;
16451da177e4SLinus Torvalds 
16468814c4b5SYOSHIFUJI Hideaki 	rcu_read_lock_bh();
16471da177e4SLinus Torvalds 	write_lock_bh(&idev->lock);
16481da177e4SLinus Torvalds 
16491da177e4SLinus Torvalds 	if (idev->dead)
16501da177e4SLinus Torvalds 		goto out;
16511da177e4SLinus Torvalds 
16521da177e4SLinus Torvalds 	if (__ipv6_regen_rndid(idev) < 0)
16531da177e4SLinus Torvalds 		goto out;
16541da177e4SLinus Torvalds 
16551da177e4SLinus Torvalds 	expires = jiffies +
16561da177e4SLinus Torvalds 		idev->cnf.temp_prefered_lft * HZ -
1657784e2710SBen Hutchings 		idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time -
1658784e2710SBen Hutchings 		idev->cnf.max_desync_factor * HZ;
16591da177e4SLinus Torvalds 	if (time_before(expires, jiffies)) {
16601da177e4SLinus Torvalds 		printk(KERN_WARNING
16611da177e4SLinus Torvalds 			"ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
16621da177e4SLinus Torvalds 			idev->dev->name);
16631da177e4SLinus Torvalds 		goto out;
16641da177e4SLinus Torvalds 	}
16651da177e4SLinus Torvalds 
16661da177e4SLinus Torvalds 	if (!mod_timer(&idev->regen_timer, expires))
16671da177e4SLinus Torvalds 		in6_dev_hold(idev);
16681da177e4SLinus Torvalds 
16691da177e4SLinus Torvalds out:
16701da177e4SLinus Torvalds 	write_unlock_bh(&idev->lock);
16718814c4b5SYOSHIFUJI Hideaki 	rcu_read_unlock_bh();
16721da177e4SLinus Torvalds 	in6_dev_put(idev);
16731da177e4SLinus Torvalds }
16741da177e4SLinus Torvalds 
16751da177e4SLinus Torvalds static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
16761da177e4SLinus Torvalds 	int ret = 0;
16771da177e4SLinus Torvalds 
16781da177e4SLinus Torvalds 	if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
16791da177e4SLinus Torvalds 		ret = __ipv6_regen_rndid(idev);
16801da177e4SLinus Torvalds 	return ret;
16811da177e4SLinus Torvalds }
16821da177e4SLinus Torvalds #endif
16831da177e4SLinus Torvalds 
16841da177e4SLinus Torvalds /*
16851da177e4SLinus Torvalds  *	Add prefix route.
16861da177e4SLinus Torvalds  */
16871da177e4SLinus Torvalds 
16881da177e4SLinus Torvalds static void
16891da177e4SLinus Torvalds addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
1690e431b8c0SJamal Hadi Salim 		      unsigned long expires, u32 flags)
16911da177e4SLinus Torvalds {
169286872cb5SThomas Graf 	struct fib6_config cfg = {
169386872cb5SThomas Graf 		.fc_table = RT6_TABLE_PREFIX,
169486872cb5SThomas Graf 		.fc_metric = IP6_RT_PRIO_ADDRCONF,
169586872cb5SThomas Graf 		.fc_ifindex = dev->ifindex,
169686872cb5SThomas Graf 		.fc_expires = expires,
169786872cb5SThomas Graf 		.fc_dst_len = plen,
169886872cb5SThomas Graf 		.fc_flags = RTF_UP | flags,
1699c346dca1SYOSHIFUJI Hideaki 		.fc_nlinfo.nl_net = dev_net(dev),
1700f410a1fbSStephen Hemminger 		.fc_protocol = RTPROT_KERNEL,
170186872cb5SThomas Graf 	};
17021da177e4SLinus Torvalds 
170386872cb5SThomas Graf 	ipv6_addr_copy(&cfg.fc_dst, pfx);
17041da177e4SLinus Torvalds 
17051da177e4SLinus Torvalds 	/* Prevent useless cloning on PtP SIT.
17061da177e4SLinus Torvalds 	   This thing is done here expecting that the whole
17071da177e4SLinus Torvalds 	   class of non-broadcast devices need not cloning.
17081da177e4SLinus Torvalds 	 */
17090be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
17101da177e4SLinus Torvalds 	if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
171186872cb5SThomas Graf 		cfg.fc_flags |= RTF_NONEXTHOP;
17120be669bbSJoerg Roedel #endif
17131da177e4SLinus Torvalds 
171486872cb5SThomas Graf 	ip6_route_add(&cfg);
17151da177e4SLinus Torvalds }
17161da177e4SLinus Torvalds 
17171da177e4SLinus Torvalds /* Create "default" multicast route to the interface */
17181da177e4SLinus Torvalds 
17191da177e4SLinus Torvalds static void addrconf_add_mroute(struct net_device *dev)
17201da177e4SLinus Torvalds {
172186872cb5SThomas Graf 	struct fib6_config cfg = {
172286872cb5SThomas Graf 		.fc_table = RT6_TABLE_LOCAL,
172386872cb5SThomas Graf 		.fc_metric = IP6_RT_PRIO_ADDRCONF,
172486872cb5SThomas Graf 		.fc_ifindex = dev->ifindex,
172586872cb5SThomas Graf 		.fc_dst_len = 8,
172686872cb5SThomas Graf 		.fc_flags = RTF_UP,
1727c346dca1SYOSHIFUJI Hideaki 		.fc_nlinfo.nl_net = dev_net(dev),
172886872cb5SThomas Graf 	};
17291da177e4SLinus Torvalds 
173086872cb5SThomas Graf 	ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
173186872cb5SThomas Graf 
173286872cb5SThomas Graf 	ip6_route_add(&cfg);
17331da177e4SLinus Torvalds }
17341da177e4SLinus Torvalds 
17350be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
17361da177e4SLinus Torvalds static void sit_route_add(struct net_device *dev)
17371da177e4SLinus Torvalds {
173886872cb5SThomas Graf 	struct fib6_config cfg = {
173986872cb5SThomas Graf 		.fc_table = RT6_TABLE_MAIN,
174086872cb5SThomas Graf 		.fc_metric = IP6_RT_PRIO_ADDRCONF,
174186872cb5SThomas Graf 		.fc_ifindex = dev->ifindex,
174286872cb5SThomas Graf 		.fc_dst_len = 96,
174386872cb5SThomas Graf 		.fc_flags = RTF_UP | RTF_NONEXTHOP,
1744c346dca1SYOSHIFUJI Hideaki 		.fc_nlinfo.nl_net = dev_net(dev),
174586872cb5SThomas Graf 	};
17461da177e4SLinus Torvalds 
17471da177e4SLinus Torvalds 	/* prefix length - 96 bits "::d.d.d.d" */
174886872cb5SThomas Graf 	ip6_route_add(&cfg);
17491da177e4SLinus Torvalds }
17500be669bbSJoerg Roedel #endif
17511da177e4SLinus Torvalds 
17521da177e4SLinus Torvalds static void addrconf_add_lroute(struct net_device *dev)
17531da177e4SLinus Torvalds {
17541da177e4SLinus Torvalds 	struct in6_addr addr;
17551da177e4SLinus Torvalds 
17561da177e4SLinus Torvalds 	ipv6_addr_set(&addr,  htonl(0xFE800000), 0, 0, 0);
17571da177e4SLinus Torvalds 	addrconf_prefix_route(&addr, 64, dev, 0, 0);
17581da177e4SLinus Torvalds }
17591da177e4SLinus Torvalds 
17601da177e4SLinus Torvalds static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
17611da177e4SLinus Torvalds {
17621da177e4SLinus Torvalds 	struct inet6_dev *idev;
17631da177e4SLinus Torvalds 
17641da177e4SLinus Torvalds 	ASSERT_RTNL();
17651da177e4SLinus Torvalds 
1766e21e8467SStephen Hemminger 	idev = ipv6_find_idev(dev);
1767e21e8467SStephen Hemminger 	if (!idev)
176864e724f6SBrian Haley 		return ERR_PTR(-ENOBUFS);
176964e724f6SBrian Haley 
177064e724f6SBrian Haley 	if (idev->cnf.disable_ipv6)
177164e724f6SBrian Haley 		return ERR_PTR(-EACCES);
17721da177e4SLinus Torvalds 
17731da177e4SLinus Torvalds 	/* Add default multicast route */
17741da177e4SLinus Torvalds 	addrconf_add_mroute(dev);
17751da177e4SLinus Torvalds 
17761da177e4SLinus Torvalds 	/* Add link local route */
17771da177e4SLinus Torvalds 	addrconf_add_lroute(dev);
17781da177e4SLinus Torvalds 	return idev;
17791da177e4SLinus Torvalds }
17801da177e4SLinus Torvalds 
17811da177e4SLinus Torvalds void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
17821da177e4SLinus Torvalds {
17831da177e4SLinus Torvalds 	struct prefix_info *pinfo;
17841da177e4SLinus Torvalds 	__u32 valid_lft;
17851da177e4SLinus Torvalds 	__u32 prefered_lft;
17861da177e4SLinus Torvalds 	int addr_type;
17871da177e4SLinus Torvalds 	struct inet6_dev *in6_dev;
178856d417b1SBrian Haley 	struct net *net = dev_net(dev);
17891da177e4SLinus Torvalds 
17901da177e4SLinus Torvalds 	pinfo = (struct prefix_info *) opt;
17911da177e4SLinus Torvalds 
17921da177e4SLinus Torvalds 	if (len < sizeof(struct prefix_info)) {
17931da177e4SLinus Torvalds 		ADBG(("addrconf: prefix option too short\n"));
17941da177e4SLinus Torvalds 		return;
17951da177e4SLinus Torvalds 	}
17961da177e4SLinus Torvalds 
17971da177e4SLinus Torvalds 	/*
17981da177e4SLinus Torvalds 	 *	Validation checks ([ADDRCONF], page 19)
17991da177e4SLinus Torvalds 	 */
18001da177e4SLinus Torvalds 
18011da177e4SLinus Torvalds 	addr_type = ipv6_addr_type(&pinfo->prefix);
18021da177e4SLinus Torvalds 
18031da177e4SLinus Torvalds 	if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
18041da177e4SLinus Torvalds 		return;
18051da177e4SLinus Torvalds 
18061da177e4SLinus Torvalds 	valid_lft = ntohl(pinfo->valid);
18071da177e4SLinus Torvalds 	prefered_lft = ntohl(pinfo->prefered);
18081da177e4SLinus Torvalds 
18091da177e4SLinus Torvalds 	if (prefered_lft > valid_lft) {
18101da177e4SLinus Torvalds 		if (net_ratelimit())
18111da177e4SLinus Torvalds 			printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
18121da177e4SLinus Torvalds 		return;
18131da177e4SLinus Torvalds 	}
18141da177e4SLinus Torvalds 
18151da177e4SLinus Torvalds 	in6_dev = in6_dev_get(dev);
18161da177e4SLinus Torvalds 
18171da177e4SLinus Torvalds 	if (in6_dev == NULL) {
18181da177e4SLinus Torvalds 		if (net_ratelimit())
18191da177e4SLinus Torvalds 			printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
18201da177e4SLinus Torvalds 		return;
18211da177e4SLinus Torvalds 	}
18221da177e4SLinus Torvalds 
18231da177e4SLinus Torvalds 	/*
18241da177e4SLinus Torvalds 	 *	Two things going on here:
18251da177e4SLinus Torvalds 	 *	1) Add routes for on-link prefixes
18261da177e4SLinus Torvalds 	 *	2) Configure prefixes with the auto flag set
18271da177e4SLinus Torvalds 	 */
18281da177e4SLinus Torvalds 
18294bed72e4SYOSHIFUJI Hideaki 	if (pinfo->onlink) {
18304bed72e4SYOSHIFUJI Hideaki 		struct rt6_info *rt;
18314bed72e4SYOSHIFUJI Hideaki 		unsigned long rt_expires;
18324bed72e4SYOSHIFUJI Hideaki 
18331da177e4SLinus Torvalds 		/* Avoid arithmetic overflow. Really, we could
18346f704992SYOSHIFUJI Hideaki 		 * save rt_expires in seconds, likely valid_lft,
18356f704992SYOSHIFUJI Hideaki 		 * but it would require division in fib gc, that it
18366f704992SYOSHIFUJI Hideaki 		 * not good.
18371da177e4SLinus Torvalds 		 */
18384bed72e4SYOSHIFUJI Hideaki 		if (HZ > USER_HZ)
18394bed72e4SYOSHIFUJI Hideaki 			rt_expires = addrconf_timeout_fixup(valid_lft, HZ);
18404bed72e4SYOSHIFUJI Hideaki 		else
18414bed72e4SYOSHIFUJI Hideaki 			rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ);
18423dd4bc68SYOSHIFUJI Hideaki 
18434bed72e4SYOSHIFUJI Hideaki 		if (addrconf_finite_timeout(rt_expires))
18444bed72e4SYOSHIFUJI Hideaki 			rt_expires *= HZ;
18451da177e4SLinus Torvalds 
184656d417b1SBrian Haley 		rt = rt6_lookup(net, &pinfo->prefix, NULL,
18476fda7350SBenjamin Thery 				dev->ifindex, 1);
18481da177e4SLinus Torvalds 
18492b5ead46SYOSHIFUJI Hideaki 		if (rt && addrconf_is_prefix_route(rt)) {
18506f704992SYOSHIFUJI Hideaki 			/* Autoconf prefix route */
18511da177e4SLinus Torvalds 			if (valid_lft == 0) {
1852e0a1ad73SThomas Graf 				ip6_del_rt(rt);
18531da177e4SLinus Torvalds 				rt = NULL;
18544bed72e4SYOSHIFUJI Hideaki 			} else if (addrconf_finite_timeout(rt_expires)) {
18556f704992SYOSHIFUJI Hideaki 				/* not infinity */
18563dd4bc68SYOSHIFUJI Hideaki 				rt->rt6i_expires = jiffies + rt_expires;
18576f704992SYOSHIFUJI Hideaki 				rt->rt6i_flags |= RTF_EXPIRES;
18586f704992SYOSHIFUJI Hideaki 			} else {
18596f704992SYOSHIFUJI Hideaki 				rt->rt6i_flags &= ~RTF_EXPIRES;
18606f704992SYOSHIFUJI Hideaki 				rt->rt6i_expires = 0;
18611da177e4SLinus Torvalds 			}
18621da177e4SLinus Torvalds 		} else if (valid_lft) {
18636f704992SYOSHIFUJI Hideaki 			clock_t expires = 0;
18644bed72e4SYOSHIFUJI Hideaki 			int flags = RTF_ADDRCONF | RTF_PREFIX_RT;
18654bed72e4SYOSHIFUJI Hideaki 			if (addrconf_finite_timeout(rt_expires)) {
18666f704992SYOSHIFUJI Hideaki 				/* not infinity */
18676f704992SYOSHIFUJI Hideaki 				flags |= RTF_EXPIRES;
18686f704992SYOSHIFUJI Hideaki 				expires = jiffies_to_clock_t(rt_expires);
18696f704992SYOSHIFUJI Hideaki 			}
18701da177e4SLinus Torvalds 			addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
18716f704992SYOSHIFUJI Hideaki 					      dev, expires, flags);
18721da177e4SLinus Torvalds 		}
18731da177e4SLinus Torvalds 		if (rt)
1874d8d1f30bSChangli Gao 			dst_release(&rt->dst);
18751da177e4SLinus Torvalds 	}
18761da177e4SLinus Torvalds 
18771da177e4SLinus Torvalds 	/* Try to figure out our local address for this prefix */
18781da177e4SLinus Torvalds 
18791da177e4SLinus Torvalds 	if (pinfo->autoconf && in6_dev->cnf.autoconf) {
18801da177e4SLinus Torvalds 		struct inet6_ifaddr * ifp;
18811da177e4SLinus Torvalds 		struct in6_addr addr;
18821da177e4SLinus Torvalds 		int create = 0, update_lft = 0;
18831da177e4SLinus Torvalds 
18841da177e4SLinus Torvalds 		if (pinfo->prefix_len == 64) {
18851da177e4SLinus Torvalds 			memcpy(&addr, &pinfo->prefix, 8);
18861da177e4SLinus Torvalds 			if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
18871da177e4SLinus Torvalds 			    ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
18881da177e4SLinus Torvalds 				in6_dev_put(in6_dev);
18891da177e4SLinus Torvalds 				return;
18901da177e4SLinus Torvalds 			}
18911da177e4SLinus Torvalds 			goto ok;
18921da177e4SLinus Torvalds 		}
18931da177e4SLinus Torvalds 		if (net_ratelimit())
18941da177e4SLinus Torvalds 			printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
18951da177e4SLinus Torvalds 			       pinfo->prefix_len);
18961da177e4SLinus Torvalds 		in6_dev_put(in6_dev);
18971da177e4SLinus Torvalds 		return;
18981da177e4SLinus Torvalds 
18991da177e4SLinus Torvalds ok:
19001da177e4SLinus Torvalds 
190153b7997fSYOSHIFUJI Hideaki 		ifp = ipv6_get_ifaddr(net, &addr, dev, 1);
19021da177e4SLinus Torvalds 
19031da177e4SLinus Torvalds 		if (ifp == NULL && valid_lft) {
19041da177e4SLinus Torvalds 			int max_addresses = in6_dev->cnf.max_addresses;
190595c385b4SNeil Horman 			u32 addr_flags = 0;
190695c385b4SNeil Horman 
190795c385b4SNeil Horman #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
190895c385b4SNeil Horman 			if (in6_dev->cnf.optimistic_dad &&
190953b7997fSYOSHIFUJI Hideaki 			    !net->ipv6.devconf_all->forwarding)
191095c385b4SNeil Horman 				addr_flags = IFA_F_OPTIMISTIC;
191195c385b4SNeil Horman #endif
19121da177e4SLinus Torvalds 
19131da177e4SLinus Torvalds 			/* Do not allow to create too much of autoconfigured
19141da177e4SLinus Torvalds 			 * addresses; this would be too easy way to crash kernel.
19151da177e4SLinus Torvalds 			 */
19161da177e4SLinus Torvalds 			if (!max_addresses ||
19171da177e4SLinus Torvalds 			    ipv6_count_addresses(in6_dev) < max_addresses)
19181da177e4SLinus Torvalds 				ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
191995c385b4SNeil Horman 						    addr_type&IPV6_ADDR_SCOPE_MASK,
192095c385b4SNeil Horman 						    addr_flags);
19211da177e4SLinus Torvalds 
19221da177e4SLinus Torvalds 			if (!ifp || IS_ERR(ifp)) {
19231da177e4SLinus Torvalds 				in6_dev_put(in6_dev);
19241da177e4SLinus Torvalds 				return;
19251da177e4SLinus Torvalds 			}
19261da177e4SLinus Torvalds 
19271da177e4SLinus Torvalds 			update_lft = create = 1;
19281da177e4SLinus Torvalds 			ifp->cstamp = jiffies;
19291da177e4SLinus Torvalds 			addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
19301da177e4SLinus Torvalds 		}
19311da177e4SLinus Torvalds 
19321da177e4SLinus Torvalds 		if (ifp) {
19331da177e4SLinus Torvalds 			int flags;
19341da177e4SLinus Torvalds 			unsigned long now;
19351da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY
19361da177e4SLinus Torvalds 			struct inet6_ifaddr *ift;
19371da177e4SLinus Torvalds #endif
19381da177e4SLinus Torvalds 			u32 stored_lft;
19391da177e4SLinus Torvalds 
19401da177e4SLinus Torvalds 			/* update lifetime (RFC2462 5.5.3 e) */
19411da177e4SLinus Torvalds 			spin_lock(&ifp->lock);
19421da177e4SLinus Torvalds 			now = jiffies;
19431da177e4SLinus Torvalds 			if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
19441da177e4SLinus Torvalds 				stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
19451da177e4SLinus Torvalds 			else
19461da177e4SLinus Torvalds 				stored_lft = 0;
19471da177e4SLinus Torvalds 			if (!update_lft && stored_lft) {
19481da177e4SLinus Torvalds 				if (valid_lft > MIN_VALID_LIFETIME ||
19491da177e4SLinus Torvalds 				    valid_lft > stored_lft)
19501da177e4SLinus Torvalds 					update_lft = 1;
19511da177e4SLinus Torvalds 				else if (stored_lft <= MIN_VALID_LIFETIME) {
19521da177e4SLinus Torvalds 					/* valid_lft <= stored_lft is always true */
1953a1ed0526SBrian Haley 					/*
1954a1ed0526SBrian Haley 					 * RFC 4862 Section 5.5.3e:
1955a1ed0526SBrian Haley 					 * "Note that the preferred lifetime of
1956a1ed0526SBrian Haley 					 *  the corresponding address is always
1957a1ed0526SBrian Haley 					 *  reset to the Preferred Lifetime in
1958a1ed0526SBrian Haley 					 *  the received Prefix Information
1959a1ed0526SBrian Haley 					 *  option, regardless of whether the
1960a1ed0526SBrian Haley 					 *  valid lifetime is also reset or
1961a1ed0526SBrian Haley 					 *  ignored."
1962a1ed0526SBrian Haley 					 *
1963a1ed0526SBrian Haley 					 *  So if the preferred lifetime in
1964a1ed0526SBrian Haley 					 *  this advertisement is different
1965a1ed0526SBrian Haley 					 *  than what we have stored, but the
1966a1ed0526SBrian Haley 					 *  valid lifetime is invalid, just
1967a1ed0526SBrian Haley 					 *  reset prefered_lft.
1968a1ed0526SBrian Haley 					 *
1969a1ed0526SBrian Haley 					 *  We must set the valid lifetime
1970a1ed0526SBrian Haley 					 *  to the stored lifetime since we'll
1971a1ed0526SBrian Haley 					 *  be updating the timestamp below,
1972a1ed0526SBrian Haley 					 *  else we'll set it back to the
1973a1ed0526SBrian Haley 					 *  minumum.
1974a1ed0526SBrian Haley 					 */
1975a1ed0526SBrian Haley 					if (prefered_lft != ifp->prefered_lft) {
1976a1ed0526SBrian Haley 						valid_lft = stored_lft;
1977a1ed0526SBrian Haley 						update_lft = 1;
1978a1ed0526SBrian Haley 					}
19791da177e4SLinus Torvalds 				} else {
19801da177e4SLinus Torvalds 					valid_lft = MIN_VALID_LIFETIME;
19811da177e4SLinus Torvalds 					if (valid_lft < prefered_lft)
19821da177e4SLinus Torvalds 						prefered_lft = valid_lft;
19831da177e4SLinus Torvalds 					update_lft = 1;
19841da177e4SLinus Torvalds 				}
19851da177e4SLinus Torvalds 			}
19861da177e4SLinus Torvalds 
19871da177e4SLinus Torvalds 			if (update_lft) {
19881da177e4SLinus Torvalds 				ifp->valid_lft = valid_lft;
19891da177e4SLinus Torvalds 				ifp->prefered_lft = prefered_lft;
19901da177e4SLinus Torvalds 				ifp->tstamp = now;
19911da177e4SLinus Torvalds 				flags = ifp->flags;
19921da177e4SLinus Torvalds 				ifp->flags &= ~IFA_F_DEPRECATED;
19931da177e4SLinus Torvalds 				spin_unlock(&ifp->lock);
19941da177e4SLinus Torvalds 
19951da177e4SLinus Torvalds 				if (!(flags&IFA_F_TENTATIVE))
19961da177e4SLinus Torvalds 					ipv6_ifa_notify(0, ifp);
19971da177e4SLinus Torvalds 			} else
19981da177e4SLinus Torvalds 				spin_unlock(&ifp->lock);
19991da177e4SLinus Torvalds 
20001da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY
20011da177e4SLinus Torvalds 			read_lock_bh(&in6_dev->lock);
20021da177e4SLinus Torvalds 			/* update all temporary addresses in the list */
2003372e6c8fSstephen hemminger 			list_for_each_entry(ift, &in6_dev->tempaddr_list, tmp_list) {
20041da177e4SLinus Torvalds 				/*
20051da177e4SLinus Torvalds 				 * When adjusting the lifetimes of an existing
20061da177e4SLinus Torvalds 				 * temporary address, only lower the lifetimes.
20071da177e4SLinus Torvalds 				 * Implementations must not increase the
20081da177e4SLinus Torvalds 				 * lifetimes of an existing temporary address
20091da177e4SLinus Torvalds 				 * when processing a Prefix Information Option.
20101da177e4SLinus Torvalds 				 */
2011c6fbfac2SBenoit Boissinot 				if (ifp != ift->ifpub)
2012c6fbfac2SBenoit Boissinot 					continue;
2013c6fbfac2SBenoit Boissinot 
20141da177e4SLinus Torvalds 				spin_lock(&ift->lock);
20151da177e4SLinus Torvalds 				flags = ift->flags;
20161da177e4SLinus Torvalds 				if (ift->valid_lft > valid_lft &&
20171da177e4SLinus Torvalds 				    ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
20181da177e4SLinus Torvalds 					ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
20191da177e4SLinus Torvalds 				if (ift->prefered_lft > prefered_lft &&
20201da177e4SLinus Torvalds 				    ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
20211da177e4SLinus Torvalds 					ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
20221da177e4SLinus Torvalds 				spin_unlock(&ift->lock);
20231da177e4SLinus Torvalds 				if (!(flags&IFA_F_TENTATIVE))
20241da177e4SLinus Torvalds 					ipv6_ifa_notify(0, ift);
20251da177e4SLinus Torvalds 			}
20261da177e4SLinus Torvalds 
2027aed65501SGlenn Wurster 			if ((create || list_empty(&in6_dev->tempaddr_list)) && in6_dev->cnf.use_tempaddr > 0) {
20281da177e4SLinus Torvalds 				/*
20291da177e4SLinus Torvalds 				 * When a new public address is created as described in [ADDRCONF],
2030aed65501SGlenn Wurster 				 * also create a new temporary address. Also create a temporary
2031aed65501SGlenn Wurster 				 * address if it's enabled but no temporary address currently exists.
20321da177e4SLinus Torvalds 				 */
20331da177e4SLinus Torvalds 				read_unlock_bh(&in6_dev->lock);
20341da177e4SLinus Torvalds 				ipv6_create_tempaddr(ifp, NULL);
20351da177e4SLinus Torvalds 			} else {
20361da177e4SLinus Torvalds 				read_unlock_bh(&in6_dev->lock);
20371da177e4SLinus Torvalds 			}
20381da177e4SLinus Torvalds #endif
20391da177e4SLinus Torvalds 			in6_ifa_put(ifp);
20401da177e4SLinus Torvalds 			addrconf_verify(0);
20411da177e4SLinus Torvalds 		}
20421da177e4SLinus Torvalds 	}
20431da177e4SLinus Torvalds 	inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
20441da177e4SLinus Torvalds 	in6_dev_put(in6_dev);
20451da177e4SLinus Torvalds }
20461da177e4SLinus Torvalds 
20471da177e4SLinus Torvalds /*
20481da177e4SLinus Torvalds  *	Set destination address.
20491da177e4SLinus Torvalds  *	Special case for SIT interfaces where we create a new "virtual"
20501da177e4SLinus Torvalds  *	device.
20511da177e4SLinus Torvalds  */
2052af284937SDaniel Lezcano int addrconf_set_dstaddr(struct net *net, void __user *arg)
20531da177e4SLinus Torvalds {
20541da177e4SLinus Torvalds 	struct in6_ifreq ireq;
20551da177e4SLinus Torvalds 	struct net_device *dev;
20561da177e4SLinus Torvalds 	int err = -EINVAL;
20571da177e4SLinus Torvalds 
20581da177e4SLinus Torvalds 	rtnl_lock();
20591da177e4SLinus Torvalds 
20601da177e4SLinus Torvalds 	err = -EFAULT;
20611da177e4SLinus Torvalds 	if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
20621da177e4SLinus Torvalds 		goto err_exit;
20631da177e4SLinus Torvalds 
2064af284937SDaniel Lezcano 	dev = __dev_get_by_index(net, ireq.ifr6_ifindex);
20651da177e4SLinus Torvalds 
20661da177e4SLinus Torvalds 	err = -ENODEV;
20671da177e4SLinus Torvalds 	if (dev == NULL)
20681da177e4SLinus Torvalds 		goto err_exit;
20691da177e4SLinus Torvalds 
20700be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
20711da177e4SLinus Torvalds 	if (dev->type == ARPHRD_SIT) {
20725bc3eb7eSStephen Hemminger 		const struct net_device_ops *ops = dev->netdev_ops;
20731da177e4SLinus Torvalds 		struct ifreq ifr;
20741da177e4SLinus Torvalds 		struct ip_tunnel_parm p;
20751da177e4SLinus Torvalds 
20761da177e4SLinus Torvalds 		err = -EADDRNOTAVAIL;
20771da177e4SLinus Torvalds 		if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
20781da177e4SLinus Torvalds 			goto err_exit;
20791da177e4SLinus Torvalds 
20801da177e4SLinus Torvalds 		memset(&p, 0, sizeof(p));
20811da177e4SLinus Torvalds 		p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
20821da177e4SLinus Torvalds 		p.iph.saddr = 0;
20831da177e4SLinus Torvalds 		p.iph.version = 4;
20841da177e4SLinus Torvalds 		p.iph.ihl = 5;
20851da177e4SLinus Torvalds 		p.iph.protocol = IPPROTO_IPV6;
20861da177e4SLinus Torvalds 		p.iph.ttl = 64;
2087d20b3109SStephen Hemminger 		ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
20881da177e4SLinus Torvalds 
20895bc3eb7eSStephen Hemminger 		if (ops->ndo_do_ioctl) {
20905bc3eb7eSStephen Hemminger 			mm_segment_t oldfs = get_fs();
20915bc3eb7eSStephen Hemminger 
20925bc3eb7eSStephen Hemminger 			set_fs(KERNEL_DS);
20935bc3eb7eSStephen Hemminger 			err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL);
20941da177e4SLinus Torvalds 			set_fs(oldfs);
20955bc3eb7eSStephen Hemminger 		} else
20965bc3eb7eSStephen Hemminger 			err = -EOPNOTSUPP;
20971da177e4SLinus Torvalds 
20981da177e4SLinus Torvalds 		if (err == 0) {
20991da177e4SLinus Torvalds 			err = -ENOBUFS;
2100af284937SDaniel Lezcano 			dev = __dev_get_by_name(net, p.name);
2101af284937SDaniel Lezcano 			if (!dev)
21021da177e4SLinus Torvalds 				goto err_exit;
21031da177e4SLinus Torvalds 			err = dev_open(dev);
21041da177e4SLinus Torvalds 		}
21051da177e4SLinus Torvalds 	}
21060be669bbSJoerg Roedel #endif
21071da177e4SLinus Torvalds 
21081da177e4SLinus Torvalds err_exit:
21091da177e4SLinus Torvalds 	rtnl_unlock();
21101da177e4SLinus Torvalds 	return err;
21111da177e4SLinus Torvalds }
21121da177e4SLinus Torvalds 
21131da177e4SLinus Torvalds /*
21141da177e4SLinus Torvalds  *	Manual configuration of address on an interface
21151da177e4SLinus Torvalds  */
2116af284937SDaniel Lezcano static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx,
211724ef0da7SThomas Graf 			  unsigned int plen, __u8 ifa_flags, __u32 prefered_lft,
2118af284937SDaniel Lezcano 			  __u32 valid_lft)
21191da177e4SLinus Torvalds {
21201da177e4SLinus Torvalds 	struct inet6_ifaddr *ifp;
21211da177e4SLinus Torvalds 	struct inet6_dev *idev;
21221da177e4SLinus Torvalds 	struct net_device *dev;
21231da177e4SLinus Torvalds 	int scope;
21246f704992SYOSHIFUJI Hideaki 	u32 flags;
21256f704992SYOSHIFUJI Hideaki 	clock_t expires;
21264bed72e4SYOSHIFUJI Hideaki 	unsigned long timeout;
21271da177e4SLinus Torvalds 
21281da177e4SLinus Torvalds 	ASSERT_RTNL();
21291da177e4SLinus Torvalds 
213024ef0da7SThomas Graf 	if (plen > 128)
213124ef0da7SThomas Graf 		return -EINVAL;
213224ef0da7SThomas Graf 
21330778769dSNoriaki TAKAMIYA 	/* check the lifetime */
21340778769dSNoriaki TAKAMIYA 	if (!valid_lft || prefered_lft > valid_lft)
21350778769dSNoriaki TAKAMIYA 		return -EINVAL;
21360778769dSNoriaki TAKAMIYA 
2137af284937SDaniel Lezcano 	dev = __dev_get_by_index(net, ifindex);
2138af284937SDaniel Lezcano 	if (!dev)
21391da177e4SLinus Torvalds 		return -ENODEV;
21401da177e4SLinus Torvalds 
214164e724f6SBrian Haley 	idev = addrconf_add_dev(dev);
214264e724f6SBrian Haley 	if (IS_ERR(idev))
214364e724f6SBrian Haley 		return PTR_ERR(idev);
21441da177e4SLinus Torvalds 
21451da177e4SLinus Torvalds 	scope = ipv6_addr_scope(pfx);
21461da177e4SLinus Torvalds 
21474bed72e4SYOSHIFUJI Hideaki 	timeout = addrconf_timeout_fixup(valid_lft, HZ);
21484bed72e4SYOSHIFUJI Hideaki 	if (addrconf_finite_timeout(timeout)) {
21494bed72e4SYOSHIFUJI Hideaki 		expires = jiffies_to_clock_t(timeout * HZ);
21504bed72e4SYOSHIFUJI Hideaki 		valid_lft = timeout;
21516f704992SYOSHIFUJI Hideaki 		flags = RTF_EXPIRES;
21524bed72e4SYOSHIFUJI Hideaki 	} else {
21534bed72e4SYOSHIFUJI Hideaki 		expires = 0;
21544bed72e4SYOSHIFUJI Hideaki 		flags = 0;
21554bed72e4SYOSHIFUJI Hideaki 		ifa_flags |= IFA_F_PERMANENT;
21566f704992SYOSHIFUJI Hideaki 	}
21570778769dSNoriaki TAKAMIYA 
21584bed72e4SYOSHIFUJI Hideaki 	timeout = addrconf_timeout_fixup(prefered_lft, HZ);
21594bed72e4SYOSHIFUJI Hideaki 	if (addrconf_finite_timeout(timeout)) {
21604bed72e4SYOSHIFUJI Hideaki 		if (timeout == 0)
21610778769dSNoriaki TAKAMIYA 			ifa_flags |= IFA_F_DEPRECATED;
21624bed72e4SYOSHIFUJI Hideaki 		prefered_lft = timeout;
21634bed72e4SYOSHIFUJI Hideaki 	}
21640778769dSNoriaki TAKAMIYA 
21650778769dSNoriaki TAKAMIYA 	ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
21660778769dSNoriaki TAKAMIYA 
21671da177e4SLinus Torvalds 	if (!IS_ERR(ifp)) {
216806aebfb7SHerbert Xu 		spin_lock_bh(&ifp->lock);
21690778769dSNoriaki TAKAMIYA 		ifp->valid_lft = valid_lft;
21700778769dSNoriaki TAKAMIYA 		ifp->prefered_lft = prefered_lft;
21710778769dSNoriaki TAKAMIYA 		ifp->tstamp = jiffies;
217206aebfb7SHerbert Xu 		spin_unlock_bh(&ifp->lock);
21730778769dSNoriaki TAKAMIYA 
217446d48046SYOSHIFUJI Hideaki 		addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
21756f704992SYOSHIFUJI Hideaki 				      expires, flags);
217695c385b4SNeil Horman 		/*
217795c385b4SNeil Horman 		 * Note that section 3.1 of RFC 4429 indicates
217895c385b4SNeil Horman 		 * that the Optimistic flag should not be set for
217995c385b4SNeil Horman 		 * manually configured addresses
218095c385b4SNeil Horman 		 */
21811da177e4SLinus Torvalds 		addrconf_dad_start(ifp, 0);
21821da177e4SLinus Torvalds 		in6_ifa_put(ifp);
21830778769dSNoriaki TAKAMIYA 		addrconf_verify(0);
21841da177e4SLinus Torvalds 		return 0;
21851da177e4SLinus Torvalds 	}
21861da177e4SLinus Torvalds 
21871da177e4SLinus Torvalds 	return PTR_ERR(ifp);
21881da177e4SLinus Torvalds }
21891da177e4SLinus Torvalds 
2190af284937SDaniel Lezcano static int inet6_addr_del(struct net *net, int ifindex, struct in6_addr *pfx,
219124ef0da7SThomas Graf 			  unsigned int plen)
21921da177e4SLinus Torvalds {
21931da177e4SLinus Torvalds 	struct inet6_ifaddr *ifp;
21941da177e4SLinus Torvalds 	struct inet6_dev *idev;
21951da177e4SLinus Torvalds 	struct net_device *dev;
21961da177e4SLinus Torvalds 
219724ef0da7SThomas Graf 	if (plen > 128)
219824ef0da7SThomas Graf 		return -EINVAL;
219924ef0da7SThomas Graf 
2200af284937SDaniel Lezcano 	dev = __dev_get_by_index(net, ifindex);
2201af284937SDaniel Lezcano 	if (!dev)
22021da177e4SLinus Torvalds 		return -ENODEV;
22031da177e4SLinus Torvalds 
22041da177e4SLinus Torvalds 	if ((idev = __in6_dev_get(dev)) == NULL)
22051da177e4SLinus Torvalds 		return -ENXIO;
22061da177e4SLinus Torvalds 
22071da177e4SLinus Torvalds 	read_lock_bh(&idev->lock);
2208502a2ffdSstephen hemminger 	list_for_each_entry(ifp, &idev->addr_list, if_list) {
22091da177e4SLinus Torvalds 		if (ifp->prefix_len == plen &&
22101da177e4SLinus Torvalds 		    ipv6_addr_equal(pfx, &ifp->addr)) {
22111da177e4SLinus Torvalds 			in6_ifa_hold(ifp);
22121da177e4SLinus Torvalds 			read_unlock_bh(&idev->lock);
22131da177e4SLinus Torvalds 
22141da177e4SLinus Torvalds 			ipv6_del_addr(ifp);
22151da177e4SLinus Torvalds 
22161da177e4SLinus Torvalds 			/* If the last address is deleted administratively,
22171da177e4SLinus Torvalds 			   disable IPv6 on this interface.
22181da177e4SLinus Torvalds 			 */
2219502a2ffdSstephen hemminger 			if (list_empty(&idev->addr_list))
22201da177e4SLinus Torvalds 				addrconf_ifdown(idev->dev, 1);
22211da177e4SLinus Torvalds 			return 0;
22221da177e4SLinus Torvalds 		}
22231da177e4SLinus Torvalds 	}
22241da177e4SLinus Torvalds 	read_unlock_bh(&idev->lock);
22251da177e4SLinus Torvalds 	return -EADDRNOTAVAIL;
22261da177e4SLinus Torvalds }
22271da177e4SLinus Torvalds 
22281da177e4SLinus Torvalds 
2229af284937SDaniel Lezcano int addrconf_add_ifaddr(struct net *net, void __user *arg)
22301da177e4SLinus Torvalds {
22311da177e4SLinus Torvalds 	struct in6_ifreq ireq;
22321da177e4SLinus Torvalds 	int err;
22331da177e4SLinus Torvalds 
22341da177e4SLinus Torvalds 	if (!capable(CAP_NET_ADMIN))
22351da177e4SLinus Torvalds 		return -EPERM;
22361da177e4SLinus Torvalds 
22371da177e4SLinus Torvalds 	if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
22381da177e4SLinus Torvalds 		return -EFAULT;
22391da177e4SLinus Torvalds 
22401da177e4SLinus Torvalds 	rtnl_lock();
2241af284937SDaniel Lezcano 	err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2242af284937SDaniel Lezcano 			     ireq.ifr6_prefixlen, IFA_F_PERMANENT,
2243af284937SDaniel Lezcano 			     INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
22441da177e4SLinus Torvalds 	rtnl_unlock();
22451da177e4SLinus Torvalds 	return err;
22461da177e4SLinus Torvalds }
22471da177e4SLinus Torvalds 
2248af284937SDaniel Lezcano int addrconf_del_ifaddr(struct net *net, void __user *arg)
22491da177e4SLinus Torvalds {
22501da177e4SLinus Torvalds 	struct in6_ifreq ireq;
22511da177e4SLinus Torvalds 	int err;
22521da177e4SLinus Torvalds 
22531da177e4SLinus Torvalds 	if (!capable(CAP_NET_ADMIN))
22541da177e4SLinus Torvalds 		return -EPERM;
22551da177e4SLinus Torvalds 
22561da177e4SLinus Torvalds 	if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
22571da177e4SLinus Torvalds 		return -EFAULT;
22581da177e4SLinus Torvalds 
22591da177e4SLinus Torvalds 	rtnl_lock();
2260af284937SDaniel Lezcano 	err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2261af284937SDaniel Lezcano 			     ireq.ifr6_prefixlen);
22621da177e4SLinus Torvalds 	rtnl_unlock();
22631da177e4SLinus Torvalds 	return err;
22641da177e4SLinus Torvalds }
22651da177e4SLinus Torvalds 
2266b5f348e5SIlpo Järvinen static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
2267b5f348e5SIlpo Järvinen 		     int plen, int scope)
2268b5f348e5SIlpo Järvinen {
2269b5f348e5SIlpo Järvinen 	struct inet6_ifaddr *ifp;
2270b5f348e5SIlpo Järvinen 
2271b5f348e5SIlpo Järvinen 	ifp = ipv6_add_addr(idev, addr, plen, scope, IFA_F_PERMANENT);
2272b5f348e5SIlpo Järvinen 	if (!IS_ERR(ifp)) {
2273b5f348e5SIlpo Järvinen 		spin_lock_bh(&ifp->lock);
2274b5f348e5SIlpo Järvinen 		ifp->flags &= ~IFA_F_TENTATIVE;
2275b5f348e5SIlpo Järvinen 		spin_unlock_bh(&ifp->lock);
2276b5f348e5SIlpo Järvinen 		ipv6_ifa_notify(RTM_NEWADDR, ifp);
2277b5f348e5SIlpo Järvinen 		in6_ifa_put(ifp);
2278b5f348e5SIlpo Järvinen 	}
2279b5f348e5SIlpo Järvinen }
2280b5f348e5SIlpo Järvinen 
22810be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
22821da177e4SLinus Torvalds static void sit_add_v4_addrs(struct inet6_dev *idev)
22831da177e4SLinus Torvalds {
22841da177e4SLinus Torvalds 	struct in6_addr addr;
22851da177e4SLinus Torvalds 	struct net_device *dev;
2286c346dca1SYOSHIFUJI Hideaki 	struct net *net = dev_net(idev->dev);
22871da177e4SLinus Torvalds 	int scope;
22881da177e4SLinus Torvalds 
22891da177e4SLinus Torvalds 	ASSERT_RTNL();
22901da177e4SLinus Torvalds 
22911da177e4SLinus Torvalds 	memset(&addr, 0, sizeof(struct in6_addr));
22921da177e4SLinus Torvalds 	memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
22931da177e4SLinus Torvalds 
22941da177e4SLinus Torvalds 	if (idev->dev->flags&IFF_POINTOPOINT) {
22951da177e4SLinus Torvalds 		addr.s6_addr32[0] = htonl(0xfe800000);
22961da177e4SLinus Torvalds 		scope = IFA_LINK;
22971da177e4SLinus Torvalds 	} else {
22981da177e4SLinus Torvalds 		scope = IPV6_ADDR_COMPATv4;
22991da177e4SLinus Torvalds 	}
23001da177e4SLinus Torvalds 
23011da177e4SLinus Torvalds 	if (addr.s6_addr32[3]) {
2302b5f348e5SIlpo Järvinen 		add_addr(idev, &addr, 128, scope);
23031da177e4SLinus Torvalds 		return;
23041da177e4SLinus Torvalds 	}
23051da177e4SLinus Torvalds 
23066fda7350SBenjamin Thery 	for_each_netdev(net, dev) {
2307e5ed6399SHerbert Xu 		struct in_device * in_dev = __in_dev_get_rtnl(dev);
23081da177e4SLinus Torvalds 		if (in_dev && (dev->flags & IFF_UP)) {
23091da177e4SLinus Torvalds 			struct in_ifaddr * ifa;
23101da177e4SLinus Torvalds 
23111da177e4SLinus Torvalds 			int flag = scope;
23121da177e4SLinus Torvalds 
23131da177e4SLinus Torvalds 			for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
23141da177e4SLinus Torvalds 				int plen;
23151da177e4SLinus Torvalds 
23161da177e4SLinus Torvalds 				addr.s6_addr32[3] = ifa->ifa_local;
23171da177e4SLinus Torvalds 
23181da177e4SLinus Torvalds 				if (ifa->ifa_scope == RT_SCOPE_LINK)
23191da177e4SLinus Torvalds 					continue;
23201da177e4SLinus Torvalds 				if (ifa->ifa_scope >= RT_SCOPE_HOST) {
23211da177e4SLinus Torvalds 					if (idev->dev->flags&IFF_POINTOPOINT)
23221da177e4SLinus Torvalds 						continue;
23231da177e4SLinus Torvalds 					flag |= IFA_HOST;
23241da177e4SLinus Torvalds 				}
23251da177e4SLinus Torvalds 				if (idev->dev->flags&IFF_POINTOPOINT)
23261da177e4SLinus Torvalds 					plen = 64;
23271da177e4SLinus Torvalds 				else
23281da177e4SLinus Torvalds 					plen = 96;
23291da177e4SLinus Torvalds 
2330b5f348e5SIlpo Järvinen 				add_addr(idev, &addr, plen, flag);
23311da177e4SLinus Torvalds 			}
23321da177e4SLinus Torvalds 		}
23331da177e4SLinus Torvalds 	}
23341da177e4SLinus Torvalds }
23350be669bbSJoerg Roedel #endif
23361da177e4SLinus Torvalds 
23371da177e4SLinus Torvalds static void init_loopback(struct net_device *dev)
23381da177e4SLinus Torvalds {
23391da177e4SLinus Torvalds 	struct inet6_dev  *idev;
23401da177e4SLinus Torvalds 
23411da177e4SLinus Torvalds 	/* ::1 */
23421da177e4SLinus Torvalds 
23431da177e4SLinus Torvalds 	ASSERT_RTNL();
23441da177e4SLinus Torvalds 
23451da177e4SLinus Torvalds 	if ((idev = ipv6_find_idev(dev)) == NULL) {
23461da177e4SLinus Torvalds 		printk(KERN_DEBUG "init loopback: add_dev failed\n");
23471da177e4SLinus Torvalds 		return;
23481da177e4SLinus Torvalds 	}
23491da177e4SLinus Torvalds 
2350b5f348e5SIlpo Järvinen 	add_addr(idev, &in6addr_loopback, 128, IFA_HOST);
23511da177e4SLinus Torvalds }
23521da177e4SLinus Torvalds 
23531da177e4SLinus Torvalds static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
23541da177e4SLinus Torvalds {
23551da177e4SLinus Torvalds 	struct inet6_ifaddr * ifp;
235695c385b4SNeil Horman 	u32 addr_flags = IFA_F_PERMANENT;
23571da177e4SLinus Torvalds 
235895c385b4SNeil Horman #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
235995c385b4SNeil Horman 	if (idev->cnf.optimistic_dad &&
2360702beb87SDavid Miller 	    !dev_net(idev->dev)->ipv6.devconf_all->forwarding)
236195c385b4SNeil Horman 		addr_flags |= IFA_F_OPTIMISTIC;
236295c385b4SNeil Horman #endif
236395c385b4SNeil Horman 
236495c385b4SNeil Horman 
236595c385b4SNeil Horman 	ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags);
23661da177e4SLinus Torvalds 	if (!IS_ERR(ifp)) {
236746d48046SYOSHIFUJI Hideaki 		addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
23681da177e4SLinus Torvalds 		addrconf_dad_start(ifp, 0);
23691da177e4SLinus Torvalds 		in6_ifa_put(ifp);
23701da177e4SLinus Torvalds 	}
23711da177e4SLinus Torvalds }
23721da177e4SLinus Torvalds 
23731da177e4SLinus Torvalds static void addrconf_dev_config(struct net_device *dev)
23741da177e4SLinus Torvalds {
23751da177e4SLinus Torvalds 	struct in6_addr addr;
23761da177e4SLinus Torvalds 	struct inet6_dev    * idev;
23771da177e4SLinus Torvalds 
23781da177e4SLinus Torvalds 	ASSERT_RTNL();
23791da177e4SLinus Torvalds 
238074235a25SHerbert Xu 	if ((dev->type != ARPHRD_ETHER) &&
238174235a25SHerbert Xu 	    (dev->type != ARPHRD_FDDI) &&
238274235a25SHerbert Xu 	    (dev->type != ARPHRD_IEEE802_TR) &&
238374235a25SHerbert Xu 	    (dev->type != ARPHRD_ARCNET) &&
238474235a25SHerbert Xu 	    (dev->type != ARPHRD_INFINIBAND)) {
238574235a25SHerbert Xu 		/* Alas, we support only Ethernet autoconfiguration. */
238674235a25SHerbert Xu 		return;
238774235a25SHerbert Xu 	}
238874235a25SHerbert Xu 
23891da177e4SLinus Torvalds 	idev = addrconf_add_dev(dev);
239064e724f6SBrian Haley 	if (IS_ERR(idev))
23911da177e4SLinus Torvalds 		return;
23921da177e4SLinus Torvalds 
23931da177e4SLinus Torvalds 	memset(&addr, 0, sizeof(struct in6_addr));
23941da177e4SLinus Torvalds 	addr.s6_addr32[0] = htonl(0xFE800000);
23951da177e4SLinus Torvalds 
23961da177e4SLinus Torvalds 	if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
23971da177e4SLinus Torvalds 		addrconf_add_linklocal(idev, &addr);
23981da177e4SLinus Torvalds }
23991da177e4SLinus Torvalds 
24000be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
24011da177e4SLinus Torvalds static void addrconf_sit_config(struct net_device *dev)
24021da177e4SLinus Torvalds {
24031da177e4SLinus Torvalds 	struct inet6_dev *idev;
24041da177e4SLinus Torvalds 
24051da177e4SLinus Torvalds 	ASSERT_RTNL();
24061da177e4SLinus Torvalds 
24071da177e4SLinus Torvalds 	/*
24081da177e4SLinus Torvalds 	 * Configure the tunnel with one of our IPv4
24091da177e4SLinus Torvalds 	 * addresses... we should configure all of
24101da177e4SLinus Torvalds 	 * our v4 addrs in the tunnel
24111da177e4SLinus Torvalds 	 */
24121da177e4SLinus Torvalds 
24131da177e4SLinus Torvalds 	if ((idev = ipv6_find_idev(dev)) == NULL) {
24141da177e4SLinus Torvalds 		printk(KERN_DEBUG "init sit: add_dev failed\n");
24151da177e4SLinus Torvalds 		return;
24161da177e4SLinus Torvalds 	}
24171da177e4SLinus Torvalds 
2418c7dc89c0SFred L. Templin 	if (dev->priv_flags & IFF_ISATAP) {
2419c7dc89c0SFred L. Templin 		struct in6_addr addr;
2420c7dc89c0SFred L. Templin 
2421c7dc89c0SFred L. Templin 		ipv6_addr_set(&addr,  htonl(0xFE800000), 0, 0, 0);
2422c7dc89c0SFred L. Templin 		addrconf_prefix_route(&addr, 64, dev, 0, 0);
2423c7dc89c0SFred L. Templin 		if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
2424c7dc89c0SFred L. Templin 			addrconf_add_linklocal(idev, &addr);
2425c7dc89c0SFred L. Templin 		return;
2426c7dc89c0SFred L. Templin 	}
2427c7dc89c0SFred L. Templin 
24281da177e4SLinus Torvalds 	sit_add_v4_addrs(idev);
24291da177e4SLinus Torvalds 
24301da177e4SLinus Torvalds 	if (dev->flags&IFF_POINTOPOINT) {
24311da177e4SLinus Torvalds 		addrconf_add_mroute(dev);
24321da177e4SLinus Torvalds 		addrconf_add_lroute(dev);
24331da177e4SLinus Torvalds 	} else
24341da177e4SLinus Torvalds 		sit_route_add(dev);
24351da177e4SLinus Torvalds }
24360be669bbSJoerg Roedel #endif
24371da177e4SLinus Torvalds 
24381da177e4SLinus Torvalds static inline int
24391da177e4SLinus Torvalds ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
24401da177e4SLinus Torvalds {
24411da177e4SLinus Torvalds 	struct in6_addr lladdr;
24421da177e4SLinus Torvalds 
244395c385b4SNeil Horman 	if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) {
24441da177e4SLinus Torvalds 		addrconf_add_linklocal(idev, &lladdr);
24451da177e4SLinus Torvalds 		return 0;
24461da177e4SLinus Torvalds 	}
24471da177e4SLinus Torvalds 	return -1;
24481da177e4SLinus Torvalds }
24491da177e4SLinus Torvalds 
24501da177e4SLinus Torvalds static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
24511da177e4SLinus Torvalds {
24521da177e4SLinus Torvalds 	struct net_device *link_dev;
2453c346dca1SYOSHIFUJI Hideaki 	struct net *net = dev_net(idev->dev);
24541da177e4SLinus Torvalds 
24551da177e4SLinus Torvalds 	/* first try to inherit the link-local address from the link device */
24561da177e4SLinus Torvalds 	if (idev->dev->iflink &&
24576fda7350SBenjamin Thery 	    (link_dev = __dev_get_by_index(net, idev->dev->iflink))) {
24581da177e4SLinus Torvalds 		if (!ipv6_inherit_linklocal(idev, link_dev))
24591da177e4SLinus Torvalds 			return;
24601da177e4SLinus Torvalds 	}
24611da177e4SLinus Torvalds 	/* then try to inherit it from any device */
24626fda7350SBenjamin Thery 	for_each_netdev(net, link_dev) {
24631da177e4SLinus Torvalds 		if (!ipv6_inherit_linklocal(idev, link_dev))
24641da177e4SLinus Torvalds 			return;
24651da177e4SLinus Torvalds 	}
24661da177e4SLinus Torvalds 	printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
24671da177e4SLinus Torvalds }
24681da177e4SLinus Torvalds 
24691da177e4SLinus Torvalds /*
24701da177e4SLinus Torvalds  * Autoconfigure tunnel with a link-local address so routing protocols,
24711da177e4SLinus Torvalds  * DHCPv6, MLD etc. can be run over the virtual link
24721da177e4SLinus Torvalds  */
24731da177e4SLinus Torvalds 
24741da177e4SLinus Torvalds static void addrconf_ip6_tnl_config(struct net_device *dev)
24751da177e4SLinus Torvalds {
24761da177e4SLinus Torvalds 	struct inet6_dev *idev;
24771da177e4SLinus Torvalds 
24781da177e4SLinus Torvalds 	ASSERT_RTNL();
24791da177e4SLinus Torvalds 
2480e21e8467SStephen Hemminger 	idev = addrconf_add_dev(dev);
248164e724f6SBrian Haley 	if (IS_ERR(idev)) {
24821da177e4SLinus Torvalds 		printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
24831da177e4SLinus Torvalds 		return;
24841da177e4SLinus Torvalds 	}
24851da177e4SLinus Torvalds 	ip6_tnl_add_linklocal(idev);
24861da177e4SLinus Torvalds }
24871da177e4SLinus Torvalds 
24881da177e4SLinus Torvalds static int addrconf_notify(struct notifier_block *this, unsigned long event,
24891da177e4SLinus Torvalds 			   void * data)
24901da177e4SLinus Torvalds {
24911da177e4SLinus Torvalds 	struct net_device *dev = (struct net_device *) data;
249274235a25SHerbert Xu 	struct inet6_dev *idev = __in6_dev_get(dev);
2493c5e33bddSYOSHIFUJI Hideaki 	int run_pending = 0;
2494b217d616SHerbert Xu 	int err;
24951da177e4SLinus Torvalds 
24961da177e4SLinus Torvalds 	switch (event) {
249745ba9dd2SYOSHIFUJI Hideaki 	case NETDEV_REGISTER:
249874235a25SHerbert Xu 		if (!idev && dev->mtu >= IPV6_MIN_MTU) {
249945ba9dd2SYOSHIFUJI Hideaki 			idev = ipv6_add_dev(dev);
250045ba9dd2SYOSHIFUJI Hideaki 			if (!idev)
2501b217d616SHerbert Xu 				return notifier_from_errno(-ENOMEM);
250245ba9dd2SYOSHIFUJI Hideaki 		}
250345ba9dd2SYOSHIFUJI Hideaki 		break;
2504bcdd553fSStephen Hemminger 
25051da177e4SLinus Torvalds 	case NETDEV_UP:
25063c21edbdSYOSHIFUJI Hideaki 	case NETDEV_CHANGE:
2507c2edacf8SJay Vosburgh 		if (dev->flags & IFF_SLAVE)
2508c2edacf8SJay Vosburgh 			break;
2509c2edacf8SJay Vosburgh 
25103c21edbdSYOSHIFUJI Hideaki 		if (event == NETDEV_UP) {
2511f24e3d65SMitsuru Chinen 			if (!addrconf_qdisc_ok(dev)) {
25123c21edbdSYOSHIFUJI Hideaki 				/* device is not ready yet. */
25133c21edbdSYOSHIFUJI Hideaki 				printk(KERN_INFO
25143c21edbdSYOSHIFUJI Hideaki 					"ADDRCONF(NETDEV_UP): %s: "
25153c21edbdSYOSHIFUJI Hideaki 					"link is not ready\n",
25163c21edbdSYOSHIFUJI Hideaki 					dev->name);
25173c21edbdSYOSHIFUJI Hideaki 				break;
25183c21edbdSYOSHIFUJI Hideaki 			}
251999081049SKristian Slavov 
2520d31c7b8fSEvgeniy Polyakov 			if (!idev && dev->mtu >= IPV6_MIN_MTU)
2521d31c7b8fSEvgeniy Polyakov 				idev = ipv6_add_dev(dev);
2522d31c7b8fSEvgeniy Polyakov 
2523e3ec6cfcSBenjamin Thery 			if (idev) {
252499081049SKristian Slavov 				idev->if_flags |= IF_READY;
2525e3ec6cfcSBenjamin Thery 				run_pending = 1;
2526e3ec6cfcSBenjamin Thery 			}
25273c21edbdSYOSHIFUJI Hideaki 		} else {
2528f24e3d65SMitsuru Chinen 			if (!addrconf_qdisc_ok(dev)) {
25293c21edbdSYOSHIFUJI Hideaki 				/* device is still not ready. */
25303c21edbdSYOSHIFUJI Hideaki 				break;
25313c21edbdSYOSHIFUJI Hideaki 			}
25323c21edbdSYOSHIFUJI Hideaki 
25333c21edbdSYOSHIFUJI Hideaki 			if (idev) {
2534bcdd553fSStephen Hemminger 				if (idev->if_flags & IF_READY)
25353c21edbdSYOSHIFUJI Hideaki 					/* device is already configured. */
25363c21edbdSYOSHIFUJI Hideaki 					break;
25373c21edbdSYOSHIFUJI Hideaki 				idev->if_flags |= IF_READY;
25383c21edbdSYOSHIFUJI Hideaki 			}
25393c21edbdSYOSHIFUJI Hideaki 
25403c21edbdSYOSHIFUJI Hideaki 			printk(KERN_INFO
25413c21edbdSYOSHIFUJI Hideaki 					"ADDRCONF(NETDEV_CHANGE): %s: "
25423c21edbdSYOSHIFUJI Hideaki 					"link becomes ready\n",
25433c21edbdSYOSHIFUJI Hideaki 					dev->name);
25443c21edbdSYOSHIFUJI Hideaki 
2545c5e33bddSYOSHIFUJI Hideaki 			run_pending = 1;
25463c21edbdSYOSHIFUJI Hideaki 		}
25473c21edbdSYOSHIFUJI Hideaki 
25481da177e4SLinus Torvalds 		switch (dev->type) {
25490be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
25501da177e4SLinus Torvalds 		case ARPHRD_SIT:
25511da177e4SLinus Torvalds 			addrconf_sit_config(dev);
25521da177e4SLinus Torvalds 			break;
25530be669bbSJoerg Roedel #endif
25541da177e4SLinus Torvalds 		case ARPHRD_TUNNEL6:
25551da177e4SLinus Torvalds 			addrconf_ip6_tnl_config(dev);
25561da177e4SLinus Torvalds 			break;
25571da177e4SLinus Torvalds 		case ARPHRD_LOOPBACK:
25581da177e4SLinus Torvalds 			init_loopback(dev);
25591da177e4SLinus Torvalds 			break;
25601da177e4SLinus Torvalds 
25611da177e4SLinus Torvalds 		default:
25621da177e4SLinus Torvalds 			addrconf_dev_config(dev);
25631da177e4SLinus Torvalds 			break;
25643ff50b79SStephen Hemminger 		}
2565bcdd553fSStephen Hemminger 
25661da177e4SLinus Torvalds 		if (idev) {
2567c5e33bddSYOSHIFUJI Hideaki 			if (run_pending)
2568c5e33bddSYOSHIFUJI Hideaki 				addrconf_dad_run(idev);
2569c5e33bddSYOSHIFUJI Hideaki 
2570bcdd553fSStephen Hemminger 			/*
2571bcdd553fSStephen Hemminger 			 * If the MTU changed during the interface down,
2572bcdd553fSStephen Hemminger 			 * when the interface up, the changed MTU must be
2573bcdd553fSStephen Hemminger 			 * reflected in the idev as well as routers.
25741da177e4SLinus Torvalds 			 */
2575bcdd553fSStephen Hemminger 			if (idev->cnf.mtu6 != dev->mtu &&
2576bcdd553fSStephen Hemminger 			    dev->mtu >= IPV6_MIN_MTU) {
25771da177e4SLinus Torvalds 				rt6_mtu_change(dev, dev->mtu);
25781da177e4SLinus Torvalds 				idev->cnf.mtu6 = dev->mtu;
25791da177e4SLinus Torvalds 			}
25801da177e4SLinus Torvalds 			idev->tstamp = jiffies;
25811da177e4SLinus Torvalds 			inet6_ifinfo_notify(RTM_NEWLINK, idev);
2582bcdd553fSStephen Hemminger 
2583bcdd553fSStephen Hemminger 			/*
2584bcdd553fSStephen Hemminger 			 * If the changed mtu during down is lower than
2585bcdd553fSStephen Hemminger 			 * IPV6_MIN_MTU stop IPv6 on this interface.
25861da177e4SLinus Torvalds 			 */
25871da177e4SLinus Torvalds 			if (dev->mtu < IPV6_MIN_MTU)
2588bcdd553fSStephen Hemminger 				addrconf_ifdown(dev, 1);
25891da177e4SLinus Torvalds 		}
25901da177e4SLinus Torvalds 		break;
25911da177e4SLinus Torvalds 
25921da177e4SLinus Torvalds 	case NETDEV_CHANGEMTU:
25931da177e4SLinus Torvalds 		if (idev && dev->mtu >= IPV6_MIN_MTU) {
25941da177e4SLinus Torvalds 			rt6_mtu_change(dev, dev->mtu);
25951da177e4SLinus Torvalds 			idev->cnf.mtu6 = dev->mtu;
25961da177e4SLinus Torvalds 			break;
25971da177e4SLinus Torvalds 		}
25981da177e4SLinus Torvalds 
2599d31c7b8fSEvgeniy Polyakov 		if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2600d31c7b8fSEvgeniy Polyakov 			idev = ipv6_add_dev(dev);
2601d31c7b8fSEvgeniy Polyakov 			if (idev)
2602d31c7b8fSEvgeniy Polyakov 				break;
2603d31c7b8fSEvgeniy Polyakov 		}
2604d31c7b8fSEvgeniy Polyakov 
2605bcdd553fSStephen Hemminger 		/*
2606bcdd553fSStephen Hemminger 		 * MTU falled under IPV6_MIN_MTU.
2607bcdd553fSStephen Hemminger 		 * Stop IPv6 on this interface.
2608bcdd553fSStephen Hemminger 		 */
26091da177e4SLinus Torvalds 
26101da177e4SLinus Torvalds 	case NETDEV_DOWN:
26111da177e4SLinus Torvalds 	case NETDEV_UNREGISTER:
26121da177e4SLinus Torvalds 		/*
26131da177e4SLinus Torvalds 		 *	Remove all addresses from this interface.
26141da177e4SLinus Torvalds 		 */
26151da177e4SLinus Torvalds 		addrconf_ifdown(dev, event != NETDEV_DOWN);
26161da177e4SLinus Torvalds 		break;
26173c21edbdSYOSHIFUJI Hideaki 
26181da177e4SLinus Torvalds 	case NETDEV_CHANGENAME:
26191da177e4SLinus Torvalds 		if (idev) {
26205632c515SStephen Hemminger 			snmp6_unregister_dev(idev);
2621408c4768SPavel Emelyanov 			addrconf_sysctl_unregister(idev);
2622f52295a9SPavel Emelyanov 			addrconf_sysctl_register(idev);
2623b217d616SHerbert Xu 			err = snmp6_register_dev(idev);
2624b217d616SHerbert Xu 			if (err)
2625b217d616SHerbert Xu 				return notifier_from_errno(err);
26265632c515SStephen Hemminger 		}
26271da177e4SLinus Torvalds 		break;
2628bcdd553fSStephen Hemminger 
262993d9b7d7SJiri Pirko 	case NETDEV_PRE_TYPE_CHANGE:
263093d9b7d7SJiri Pirko 	case NETDEV_POST_TYPE_CHANGE:
263193d9b7d7SJiri Pirko 		addrconf_type_change(dev, event);
263275c78500SMoni Shoua 		break;
26333ff50b79SStephen Hemminger 	}
26341da177e4SLinus Torvalds 
26351da177e4SLinus Torvalds 	return NOTIFY_OK;
26361da177e4SLinus Torvalds }
26371da177e4SLinus Torvalds 
26381da177e4SLinus Torvalds /*
26391da177e4SLinus Torvalds  *	addrconf module should be notified of a device going up
26401da177e4SLinus Torvalds  */
26411da177e4SLinus Torvalds static struct notifier_block ipv6_dev_notf = {
26421da177e4SLinus Torvalds 	.notifier_call = addrconf_notify,
26431da177e4SLinus Torvalds };
26441da177e4SLinus Torvalds 
264593d9b7d7SJiri Pirko static void addrconf_type_change(struct net_device *dev, unsigned long event)
264675c78500SMoni Shoua {
264775c78500SMoni Shoua 	struct inet6_dev *idev;
264875c78500SMoni Shoua 	ASSERT_RTNL();
264975c78500SMoni Shoua 
265075c78500SMoni Shoua 	idev = __in6_dev_get(dev);
265175c78500SMoni Shoua 
265293d9b7d7SJiri Pirko 	if (event == NETDEV_POST_TYPE_CHANGE)
265375c78500SMoni Shoua 		ipv6_mc_remap(idev);
265493d9b7d7SJiri Pirko 	else if (event == NETDEV_PRE_TYPE_CHANGE)
265575c78500SMoni Shoua 		ipv6_mc_unmap(idev);
265675c78500SMoni Shoua }
265775c78500SMoni Shoua 
26581da177e4SLinus Torvalds static int addrconf_ifdown(struct net_device *dev, int how)
26591da177e4SLinus Torvalds {
2660c346dca1SYOSHIFUJI Hideaki 	struct net *net = dev_net(dev);
2661502a2ffdSstephen hemminger 	struct inet6_dev *idev;
2662502a2ffdSstephen hemminger 	struct inet6_ifaddr *ifa;
2663502a2ffdSstephen hemminger 	LIST_HEAD(keep_list);
26644c5ff6a6SHerbert Xu 	int state;
26651da177e4SLinus Torvalds 
26661da177e4SLinus Torvalds 	ASSERT_RTNL();
26671da177e4SLinus Torvalds 
2668f3db4851SDaniel Lezcano 	rt6_ifdown(net, dev);
26691da177e4SLinus Torvalds 	neigh_ifdown(&nd_tbl, dev);
26701da177e4SLinus Torvalds 
26711da177e4SLinus Torvalds 	idev = __in6_dev_get(dev);
26721da177e4SLinus Torvalds 	if (idev == NULL)
26731da177e4SLinus Torvalds 		return -ENODEV;
26741da177e4SLinus Torvalds 
2675bcdd553fSStephen Hemminger 	/*
2676bcdd553fSStephen Hemminger 	 * Step 1: remove reference to ipv6 device from parent device.
2677bcdd553fSStephen Hemminger 	 *	   Do not dev_put!
26781da177e4SLinus Torvalds 	 */
2679439e2385SDenis V. Lunev 	if (how) {
26801da177e4SLinus Torvalds 		idev->dead = 1;
26818814c4b5SYOSHIFUJI Hideaki 
26828814c4b5SYOSHIFUJI Hideaki 		/* protected by rtnl_lock */
26838814c4b5SYOSHIFUJI Hideaki 		rcu_assign_pointer(dev->ip6_ptr, NULL);
26841da177e4SLinus Torvalds 
26851da177e4SLinus Torvalds 		/* Step 1.5: remove snmp6 entry */
26861da177e4SLinus Torvalds 		snmp6_unregister_dev(idev);
26871da177e4SLinus Torvalds 
26881da177e4SLinus Torvalds 	}
26891da177e4SLinus Torvalds 
26901da177e4SLinus Torvalds 	write_lock_bh(&idev->lock);
26911da177e4SLinus Torvalds 
2692bcdd553fSStephen Hemminger 	/* Step 2: clear flags for stateless addrconf */
2693439e2385SDenis V. Lunev 	if (!how)
26943c21edbdSYOSHIFUJI Hideaki 		idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
26951da177e4SLinus Torvalds 
26961da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY
2697439e2385SDenis V. Lunev 	if (how && del_timer(&idev->regen_timer))
26981da177e4SLinus Torvalds 		in6_dev_put(idev);
26991da177e4SLinus Torvalds 
2700bcdd553fSStephen Hemminger 	/* Step 3: clear tempaddr list */
2701372e6c8fSstephen hemminger 	while (!list_empty(&idev->tempaddr_list)) {
2702372e6c8fSstephen hemminger 		ifa = list_first_entry(&idev->tempaddr_list,
2703372e6c8fSstephen hemminger 				       struct inet6_ifaddr, tmp_list);
2704372e6c8fSstephen hemminger 		list_del(&ifa->tmp_list);
27051da177e4SLinus Torvalds 		write_unlock_bh(&idev->lock);
27061da177e4SLinus Torvalds 		spin_lock_bh(&ifa->lock);
27071da177e4SLinus Torvalds 
27081da177e4SLinus Torvalds 		if (ifa->ifpub) {
27091da177e4SLinus Torvalds 			in6_ifa_put(ifa->ifpub);
27101da177e4SLinus Torvalds 			ifa->ifpub = NULL;
27111da177e4SLinus Torvalds 		}
27121da177e4SLinus Torvalds 		spin_unlock_bh(&ifa->lock);
27131da177e4SLinus Torvalds 		in6_ifa_put(ifa);
27141da177e4SLinus Torvalds 		write_lock_bh(&idev->lock);
27151da177e4SLinus Torvalds 	}
27161da177e4SLinus Torvalds #endif
27178f37ada5Sstephen hemminger 
2718502a2ffdSstephen hemminger 	while (!list_empty(&idev->addr_list)) {
2719502a2ffdSstephen hemminger 		ifa = list_first_entry(&idev->addr_list,
2720502a2ffdSstephen hemminger 				       struct inet6_ifaddr, if_list);
272184e8b803Sstephen hemminger 		addrconf_del_timer(ifa);
272284e8b803Sstephen hemminger 
272384e8b803Sstephen hemminger 		/* If just doing link down, and address is permanent
272484e8b803Sstephen hemminger 		   and not link-local, then retain it. */
2725bcdd553fSStephen Hemminger 		if (!how &&
272684e8b803Sstephen hemminger 		    (ifa->flags&IFA_F_PERMANENT) &&
272784e8b803Sstephen hemminger 		    !(ipv6_addr_type(&ifa->addr) & IPV6_ADDR_LINKLOCAL)) {
2728502a2ffdSstephen hemminger 			list_move_tail(&ifa->if_list, &keep_list);
2729dc2b99f7Sstephen hemminger 
273084e8b803Sstephen hemminger 			/* If not doing DAD on this address, just keep it. */
273184e8b803Sstephen hemminger 			if ((dev->flags&(IFF_NOARP|IFF_LOOPBACK)) ||
2732dc2b99f7Sstephen hemminger 			    idev->cnf.accept_dad <= 0 ||
273384e8b803Sstephen hemminger 			    (ifa->flags & IFA_F_NODAD))
273484e8b803Sstephen hemminger 				continue;
273584e8b803Sstephen hemminger 
273684e8b803Sstephen hemminger 			/* If it was tentative already, no need to notify */
273784e8b803Sstephen hemminger 			if (ifa->flags & IFA_F_TENTATIVE)
273884e8b803Sstephen hemminger 				continue;
273984e8b803Sstephen hemminger 
274084e8b803Sstephen hemminger 			/* Flag it for later restoration when link comes up */
2741dc2b99f7Sstephen hemminger 			ifa->flags |= IFA_F_TENTATIVE;
2742f2344a13SHerbert Xu 			ifa->state = INET6_IFADDR_STATE_DAD;
27434c5ff6a6SHerbert Xu 
274427bdb2abSstephen hemminger 			write_unlock_bh(&idev->lock);
27454c5ff6a6SHerbert Xu 
27464c5ff6a6SHerbert Xu 			in6_ifa_hold(ifa);
2747dc2b99f7Sstephen hemminger 		} else {
2748502a2ffdSstephen hemminger 			list_del(&ifa->if_list);
27491da177e4SLinus Torvalds 
2750c2e21293Sstephen hemminger 			/* clear hash table */
27515c578aedSstephen hemminger 			spin_lock_bh(&addrconf_hash_lock);
27525c578aedSstephen hemminger 			hlist_del_init_rcu(&ifa->addr_lst);
27535c578aedSstephen hemminger 			spin_unlock_bh(&addrconf_hash_lock);
27544c5ff6a6SHerbert Xu 
27554c5ff6a6SHerbert Xu 			write_unlock_bh(&idev->lock);
27564c5ff6a6SHerbert Xu 			spin_lock_bh(&ifa->state_lock);
27574c5ff6a6SHerbert Xu 			state = ifa->state;
27584c5ff6a6SHerbert Xu 			ifa->state = INET6_IFADDR_STATE_DEAD;
27594c5ff6a6SHerbert Xu 			spin_unlock_bh(&ifa->state_lock);
27604c5ff6a6SHerbert Xu 
27614c5ff6a6SHerbert Xu 			if (state == INET6_IFADDR_STATE_DEAD)
27624c5ff6a6SHerbert Xu 				goto put_ifa;
276327bdb2abSstephen hemminger 		}
2764c2e21293Sstephen hemminger 
27651da177e4SLinus Torvalds 		__ipv6_ifa_notify(RTM_DELADDR, ifa);
2766e9d3e084SHerbert Xu 		if (ifa->state == INET6_IFADDR_STATE_DEAD)
27678595805aSstephen hemminger 			atomic_notifier_call_chain(&inet6addr_chain,
27688595805aSstephen hemminger 						   NETDEV_DOWN, ifa);
27694c5ff6a6SHerbert Xu 
27704c5ff6a6SHerbert Xu put_ifa:
27711da177e4SLinus Torvalds 		in6_ifa_put(ifa);
27721da177e4SLinus Torvalds 
27731da177e4SLinus Torvalds 		write_lock_bh(&idev->lock);
27741da177e4SLinus Torvalds 	}
27758f37ada5Sstephen hemminger 
2776502a2ffdSstephen hemminger 	list_splice(&keep_list, &idev->addr_list);
27778f37ada5Sstephen hemminger 
27781da177e4SLinus Torvalds 	write_unlock_bh(&idev->lock);
27791da177e4SLinus Torvalds 
27801da177e4SLinus Torvalds 	/* Step 5: Discard multicast list */
2781439e2385SDenis V. Lunev 	if (how)
27821da177e4SLinus Torvalds 		ipv6_mc_destroy_dev(idev);
27831da177e4SLinus Torvalds 	else
27841da177e4SLinus Torvalds 		ipv6_mc_down(idev);
27851da177e4SLinus Torvalds 
27861da177e4SLinus Torvalds 	idev->tstamp = jiffies;
27871da177e4SLinus Torvalds 
2788bcdd553fSStephen Hemminger 	/* Last: Shot the device (if unregistered) */
2789439e2385SDenis V. Lunev 	if (how) {
2790408c4768SPavel Emelyanov 		addrconf_sysctl_unregister(idev);
27911da177e4SLinus Torvalds 		neigh_parms_release(&nd_tbl, idev->nd_parms);
27921da177e4SLinus Torvalds 		neigh_ifdown(&nd_tbl, dev);
27931da177e4SLinus Torvalds 		in6_dev_put(idev);
27941da177e4SLinus Torvalds 	}
27951da177e4SLinus Torvalds 	return 0;
27961da177e4SLinus Torvalds }
27971da177e4SLinus Torvalds 
27981da177e4SLinus Torvalds static void addrconf_rs_timer(unsigned long data)
27991da177e4SLinus Torvalds {
28001da177e4SLinus Torvalds 	struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
28015b2a1953Sstephen hemminger 	struct inet6_dev *idev = ifp->idev;
28021da177e4SLinus Torvalds 
28035b2a1953Sstephen hemminger 	read_lock(&idev->lock);
28045b2a1953Sstephen hemminger 	if (idev->dead || !(idev->if_flags & IF_READY))
28051da177e4SLinus Torvalds 		goto out;
28061da177e4SLinus Torvalds 
28075b2a1953Sstephen hemminger 	if (idev->cnf.forwarding)
28081da177e4SLinus Torvalds 		goto out;
28095b2a1953Sstephen hemminger 
28105b2a1953Sstephen hemminger 	/* Announcement received after solicitation was sent */
28115b2a1953Sstephen hemminger 	if (idev->if_flags & IF_RA_RCVD)
28125b2a1953Sstephen hemminger 		goto out;
28131da177e4SLinus Torvalds 
28141da177e4SLinus Torvalds 	spin_lock(&ifp->lock);
28155b2a1953Sstephen hemminger 	if (ifp->probes++ < idev->cnf.rtr_solicits) {
28161da177e4SLinus Torvalds 		/* The wait after the last probe can be shorter */
28171da177e4SLinus Torvalds 		addrconf_mod_timer(ifp, AC_RS,
28185b2a1953Sstephen hemminger 				   (ifp->probes == idev->cnf.rtr_solicits) ?
28195b2a1953Sstephen hemminger 				   idev->cnf.rtr_solicit_delay :
28205b2a1953Sstephen hemminger 				   idev->cnf.rtr_solicit_interval);
28211da177e4SLinus Torvalds 		spin_unlock(&ifp->lock);
28221da177e4SLinus Torvalds 
28235b2a1953Sstephen hemminger 		ndisc_send_rs(idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
28241da177e4SLinus Torvalds 	} else {
28251da177e4SLinus Torvalds 		spin_unlock(&ifp->lock);
28261da177e4SLinus Torvalds 		/*
28271da177e4SLinus Torvalds 		 * Note: we do not support deprecated "all on-link"
28281da177e4SLinus Torvalds 		 * assumption any longer.
28291da177e4SLinus Torvalds 		 */
28301da177e4SLinus Torvalds 		printk(KERN_DEBUG "%s: no IPv6 routers present\n",
28315b2a1953Sstephen hemminger 		       idev->dev->name);
28321da177e4SLinus Torvalds 	}
28331da177e4SLinus Torvalds 
28341da177e4SLinus Torvalds out:
28355b2a1953Sstephen hemminger 	read_unlock(&idev->lock);
28361da177e4SLinus Torvalds 	in6_ifa_put(ifp);
28371da177e4SLinus Torvalds }
28381da177e4SLinus Torvalds 
28391da177e4SLinus Torvalds /*
28401da177e4SLinus Torvalds  *	Duplicate Address Detection
28411da177e4SLinus Torvalds  */
28423c21edbdSYOSHIFUJI Hideaki static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
28433c21edbdSYOSHIFUJI Hideaki {
28443c21edbdSYOSHIFUJI Hideaki 	unsigned long rand_num;
28453c21edbdSYOSHIFUJI Hideaki 	struct inet6_dev *idev = ifp->idev;
28463c21edbdSYOSHIFUJI Hideaki 
284795c385b4SNeil Horman 	if (ifp->flags & IFA_F_OPTIMISTIC)
284895c385b4SNeil Horman 		rand_num = 0;
284995c385b4SNeil Horman 	else
28503c21edbdSYOSHIFUJI Hideaki 		rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
285195c385b4SNeil Horman 
28523c21edbdSYOSHIFUJI Hideaki 	ifp->probes = idev->cnf.dad_transmits;
28533c21edbdSYOSHIFUJI Hideaki 	addrconf_mod_timer(ifp, AC_DAD, rand_num);
28543c21edbdSYOSHIFUJI Hideaki }
28553c21edbdSYOSHIFUJI Hideaki 
2856e431b8c0SJamal Hadi Salim static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
28571da177e4SLinus Torvalds {
28581da177e4SLinus Torvalds 	struct inet6_dev *idev = ifp->idev;
28591da177e4SLinus Torvalds 	struct net_device *dev = idev->dev;
28601da177e4SLinus Torvalds 
28611da177e4SLinus Torvalds 	addrconf_join_solict(dev, &ifp->addr);
28621da177e4SLinus Torvalds 
28631da177e4SLinus Torvalds 	net_srandom(ifp->addr.s6_addr32[3]);
28641da177e4SLinus Torvalds 
28651da177e4SLinus Torvalds 	read_lock_bh(&idev->lock);
2866622ccdf1SHerbert Xu 	spin_lock(&ifp->lock);
2867e9d3e084SHerbert Xu 	if (ifp->state == INET6_IFADDR_STATE_DEAD)
28681da177e4SLinus Torvalds 		goto out;
28691da177e4SLinus Torvalds 
28701da177e4SLinus Torvalds 	if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
28711b34be74SYOSHIFUJI Hideaki 	    idev->cnf.accept_dad < 1 ||
287255ebaef1SNoriaki TAKAMIYA 	    !(ifp->flags&IFA_F_TENTATIVE) ||
287355ebaef1SNoriaki TAKAMIYA 	    ifp->flags & IFA_F_NODAD) {
2874cc411d0bSBrian Haley 		ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED);
287521809fafSstephen hemminger 		spin_unlock(&ifp->lock);
28761da177e4SLinus Torvalds 		read_unlock_bh(&idev->lock);
28771da177e4SLinus Torvalds 
28781da177e4SLinus Torvalds 		addrconf_dad_completed(ifp);
28791da177e4SLinus Torvalds 		return;
28801da177e4SLinus Torvalds 	}
28811da177e4SLinus Torvalds 
28826732badeSYOSHIFUJI Hideaki 	if (!(idev->if_flags & IF_READY)) {
288321809fafSstephen hemminger 		spin_unlock(&ifp->lock);
28846732badeSYOSHIFUJI Hideaki 		read_unlock_bh(&idev->lock);
28853c21edbdSYOSHIFUJI Hideaki 		/*
2886590a9887SMasatake YAMATO 		 * If the device is not ready:
28873c21edbdSYOSHIFUJI Hideaki 		 * - keep it tentative if it is a permanent address.
28883c21edbdSYOSHIFUJI Hideaki 		 * - otherwise, kill it.
28893c21edbdSYOSHIFUJI Hideaki 		 */
28903c21edbdSYOSHIFUJI Hideaki 		in6_ifa_hold(ifp);
2891cc411d0bSBrian Haley 		addrconf_dad_stop(ifp, 0);
28926732badeSYOSHIFUJI Hideaki 		return;
28933c21edbdSYOSHIFUJI Hideaki 	}
289495c385b4SNeil Horman 
289595c385b4SNeil Horman 	/*
289695c385b4SNeil Horman 	 * Optimistic nodes can start receiving
289795c385b4SNeil Horman 	 * Frames right away
289895c385b4SNeil Horman 	 */
289995c385b4SNeil Horman 	if (ifp->flags & IFA_F_OPTIMISTIC)
290095c385b4SNeil Horman 		ip6_ins_rt(ifp->rt);
290195c385b4SNeil Horman 
29026732badeSYOSHIFUJI Hideaki 	addrconf_dad_kick(ifp);
29031da177e4SLinus Torvalds out:
2904622ccdf1SHerbert Xu 	spin_unlock(&ifp->lock);
29051da177e4SLinus Torvalds 	read_unlock_bh(&idev->lock);
29061da177e4SLinus Torvalds }
29071da177e4SLinus Torvalds 
29081da177e4SLinus Torvalds static void addrconf_dad_timer(unsigned long data)
29091da177e4SLinus Torvalds {
29101da177e4SLinus Torvalds 	struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
29111da177e4SLinus Torvalds 	struct inet6_dev *idev = ifp->idev;
29121da177e4SLinus Torvalds 	struct in6_addr mcaddr;
29131da177e4SLinus Torvalds 
2914f2344a13SHerbert Xu 	if (!ifp->probes && addrconf_dad_end(ifp))
2915f2344a13SHerbert Xu 		goto out;
2916f2344a13SHerbert Xu 
2917122e4519Sstephen hemminger 	read_lock(&idev->lock);
2918122e4519Sstephen hemminger 	if (idev->dead || !(idev->if_flags & IF_READY)) {
2919122e4519Sstephen hemminger 		read_unlock(&idev->lock);
29201da177e4SLinus Torvalds 		goto out;
29211da177e4SLinus Torvalds 	}
292221809fafSstephen hemminger 
292321809fafSstephen hemminger 	spin_lock(&ifp->lock);
2924622ccdf1SHerbert Xu 	if (ifp->state == INET6_IFADDR_STATE_DEAD) {
2925622ccdf1SHerbert Xu 		spin_unlock(&ifp->lock);
2926622ccdf1SHerbert Xu 		read_unlock(&idev->lock);
2927622ccdf1SHerbert Xu 		goto out;
2928622ccdf1SHerbert Xu 	}
2929622ccdf1SHerbert Xu 
29301da177e4SLinus Torvalds 	if (ifp->probes == 0) {
29311da177e4SLinus Torvalds 		/*
29321da177e4SLinus Torvalds 		 * DAD was successful
29331da177e4SLinus Torvalds 		 */
29341da177e4SLinus Torvalds 
2935cc411d0bSBrian Haley 		ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED);
293621809fafSstephen hemminger 		spin_unlock(&ifp->lock);
2937122e4519Sstephen hemminger 		read_unlock(&idev->lock);
29381da177e4SLinus Torvalds 
29391da177e4SLinus Torvalds 		addrconf_dad_completed(ifp);
29401da177e4SLinus Torvalds 
29411da177e4SLinus Torvalds 		goto out;
29421da177e4SLinus Torvalds 	}
29431da177e4SLinus Torvalds 
29441da177e4SLinus Torvalds 	ifp->probes--;
29451da177e4SLinus Torvalds 	addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
294621809fafSstephen hemminger 	spin_unlock(&ifp->lock);
2947122e4519Sstephen hemminger 	read_unlock(&idev->lock);
29481da177e4SLinus Torvalds 
29491da177e4SLinus Torvalds 	/* send a neighbour solicitation for our addr */
29501da177e4SLinus Torvalds 	addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
2951d7aabf22SYOSHIFUJI Hideaki 	ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any);
29521da177e4SLinus Torvalds out:
29531da177e4SLinus Torvalds 	in6_ifa_put(ifp);
29541da177e4SLinus Torvalds }
29551da177e4SLinus Torvalds 
29561da177e4SLinus Torvalds static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
29571da177e4SLinus Torvalds {
29581da177e4SLinus Torvalds 	struct net_device *dev = ifp->idev->dev;
29591da177e4SLinus Torvalds 
29601da177e4SLinus Torvalds 	/*
29611da177e4SLinus Torvalds 	 *	Configure the address for reception. Now it is valid.
29621da177e4SLinus Torvalds 	 */
29631da177e4SLinus Torvalds 
29641da177e4SLinus Torvalds 	ipv6_ifa_notify(RTM_NEWADDR, ifp);
29651da177e4SLinus Torvalds 
29661da177e4SLinus Torvalds 	/* If added prefix is link local and forwarding is off,
29671da177e4SLinus Torvalds 	   start sending router solicitations.
29681da177e4SLinus Torvalds 	 */
29691da177e4SLinus Torvalds 
2970c3bccac2SThomas Graf 	if ((ifp->idev->cnf.forwarding == 0 ||
2971c3bccac2SThomas Graf 	     ifp->idev->cnf.forwarding == 2) &&
29721da177e4SLinus Torvalds 	    ifp->idev->cnf.rtr_solicits > 0 &&
29731da177e4SLinus Torvalds 	    (dev->flags&IFF_LOOPBACK) == 0 &&
29741da177e4SLinus Torvalds 	    (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
29751da177e4SLinus Torvalds 		/*
29761da177e4SLinus Torvalds 		 *	If a host as already performed a random delay
29771da177e4SLinus Torvalds 		 *	[...] as part of DAD [...] there is no need
29781da177e4SLinus Torvalds 		 *	to delay again before sending the first RS
29791da177e4SLinus Torvalds 		 */
2980f3ee4010SYOSHIFUJI Hideaki 		ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
29811da177e4SLinus Torvalds 
29821da177e4SLinus Torvalds 		spin_lock_bh(&ifp->lock);
29831da177e4SLinus Torvalds 		ifp->probes = 1;
29841da177e4SLinus Torvalds 		ifp->idev->if_flags |= IF_RS_SENT;
29851da177e4SLinus Torvalds 		addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
29861da177e4SLinus Torvalds 		spin_unlock_bh(&ifp->lock);
29871da177e4SLinus Torvalds 	}
29881da177e4SLinus Torvalds }
29891da177e4SLinus Torvalds 
2990e21e8467SStephen Hemminger static void addrconf_dad_run(struct inet6_dev *idev)
2991e21e8467SStephen Hemminger {
2992c5e33bddSYOSHIFUJI Hideaki 	struct inet6_ifaddr *ifp;
2993c5e33bddSYOSHIFUJI Hideaki 
2994c5e33bddSYOSHIFUJI Hideaki 	read_lock_bh(&idev->lock);
2995502a2ffdSstephen hemminger 	list_for_each_entry(ifp, &idev->addr_list, if_list) {
299621809fafSstephen hemminger 		spin_lock(&ifp->lock);
2997f2344a13SHerbert Xu 		if (ifp->flags & IFA_F_TENTATIVE &&
2998f2344a13SHerbert Xu 		    ifp->state == INET6_IFADDR_STATE_DAD)
2999c5e33bddSYOSHIFUJI Hideaki 			addrconf_dad_kick(ifp);
3000f2344a13SHerbert Xu 		spin_unlock(&ifp->lock);
3001c5e33bddSYOSHIFUJI Hideaki 	}
3002c5e33bddSYOSHIFUJI Hideaki 	read_unlock_bh(&idev->lock);
3003c5e33bddSYOSHIFUJI Hideaki }
3004c5e33bddSYOSHIFUJI Hideaki 
30051da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS
30061da177e4SLinus Torvalds struct if6_iter_state {
30073c40090aSDaniel Lezcano 	struct seq_net_private p;
30081da177e4SLinus Torvalds 	int bucket;
30091da177e4SLinus Torvalds };
30101da177e4SLinus Torvalds 
30111da177e4SLinus Torvalds static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
30121da177e4SLinus Torvalds {
30131da177e4SLinus Torvalds 	struct inet6_ifaddr *ifa = NULL;
30141da177e4SLinus Torvalds 	struct if6_iter_state *state = seq->private;
30151218854aSYOSHIFUJI Hideaki 	struct net *net = seq_file_net(seq);
30161da177e4SLinus Torvalds 
30171da177e4SLinus Torvalds 	for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
3018c2e21293Sstephen hemminger 		struct hlist_node *n;
30194f70eccaSEric Dumazet 		hlist_for_each_entry_rcu_bh(ifa, n, &inet6_addr_lst[state->bucket],
30205c578aedSstephen hemminger 					 addr_lst)
3021c2e21293Sstephen hemminger 			if (net_eq(dev_net(ifa->idev->dev), net))
30221da177e4SLinus Torvalds 				return ifa;
30231da177e4SLinus Torvalds 	}
3024c2e21293Sstephen hemminger 	return NULL;
3025c2e21293Sstephen hemminger }
30261da177e4SLinus Torvalds 
3027c2e21293Sstephen hemminger static struct inet6_ifaddr *if6_get_next(struct seq_file *seq,
3028c2e21293Sstephen hemminger 					 struct inet6_ifaddr *ifa)
30291da177e4SLinus Torvalds {
30301da177e4SLinus Torvalds 	struct if6_iter_state *state = seq->private;
30311218854aSYOSHIFUJI Hideaki 	struct net *net = seq_file_net(seq);
3032c2e21293Sstephen hemminger 	struct hlist_node *n = &ifa->addr_lst;
30331da177e4SLinus Torvalds 
30344f70eccaSEric Dumazet 	hlist_for_each_entry_continue_rcu_bh(ifa, n, addr_lst)
3035c2e21293Sstephen hemminger 		if (net_eq(dev_net(ifa->idev->dev), net))
30361da177e4SLinus Torvalds 			return ifa;
30371da177e4SLinus Torvalds 
3038c2e21293Sstephen hemminger 	while (++state->bucket < IN6_ADDR_HSIZE) {
30394f70eccaSEric Dumazet 		hlist_for_each_entry_rcu_bh(ifa, n,
3040c2e21293Sstephen hemminger 				     &inet6_addr_lst[state->bucket], addr_lst) {
3041c2e21293Sstephen hemminger 			if (net_eq(dev_net(ifa->idev->dev), net))
3042c2e21293Sstephen hemminger 				return ifa;
3043c2e21293Sstephen hemminger 		}
3044c2e21293Sstephen hemminger 	}
3045c2e21293Sstephen hemminger 
3046c2e21293Sstephen hemminger 	return NULL;
3047c2e21293Sstephen hemminger }
3048c2e21293Sstephen hemminger 
30491da177e4SLinus Torvalds static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
30501da177e4SLinus Torvalds {
30511da177e4SLinus Torvalds 	struct inet6_ifaddr *ifa = if6_get_first(seq);
30521da177e4SLinus Torvalds 
30531da177e4SLinus Torvalds 	if (ifa)
30541da177e4SLinus Torvalds 		while (pos && (ifa = if6_get_next(seq, ifa)) != NULL)
30551da177e4SLinus Torvalds 			--pos;
30561da177e4SLinus Torvalds 	return pos ? NULL : ifa;
30571da177e4SLinus Torvalds }
30581da177e4SLinus Torvalds 
30591da177e4SLinus Torvalds static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
30604f70eccaSEric Dumazet 	__acquires(rcu_bh)
30611da177e4SLinus Torvalds {
30625c578aedSstephen hemminger 	rcu_read_lock_bh();
30631da177e4SLinus Torvalds 	return if6_get_idx(seq, *pos);
30641da177e4SLinus Torvalds }
30651da177e4SLinus Torvalds 
30661da177e4SLinus Torvalds static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
30671da177e4SLinus Torvalds {
30681da177e4SLinus Torvalds 	struct inet6_ifaddr *ifa;
30691da177e4SLinus Torvalds 
30701da177e4SLinus Torvalds 	ifa = if6_get_next(seq, v);
30711da177e4SLinus Torvalds 	++*pos;
30721da177e4SLinus Torvalds 	return ifa;
30731da177e4SLinus Torvalds }
30741da177e4SLinus Torvalds 
30751da177e4SLinus Torvalds static void if6_seq_stop(struct seq_file *seq, void *v)
30764f70eccaSEric Dumazet 	__releases(rcu_bh)
30771da177e4SLinus Torvalds {
30785c578aedSstephen hemminger 	rcu_read_unlock_bh();
30791da177e4SLinus Torvalds }
30801da177e4SLinus Torvalds 
30811da177e4SLinus Torvalds static int if6_seq_show(struct seq_file *seq, void *v)
30821da177e4SLinus Torvalds {
30831da177e4SLinus Torvalds 	struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
30844b7a4274SHarvey Harrison 	seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n",
3085b071195dSHarvey Harrison 		   &ifp->addr,
30861da177e4SLinus Torvalds 		   ifp->idev->dev->ifindex,
30871da177e4SLinus Torvalds 		   ifp->prefix_len,
30881da177e4SLinus Torvalds 		   ifp->scope,
30891da177e4SLinus Torvalds 		   ifp->flags,
30901da177e4SLinus Torvalds 		   ifp->idev->dev->name);
30911da177e4SLinus Torvalds 	return 0;
30921da177e4SLinus Torvalds }
30931da177e4SLinus Torvalds 
309456b3d975SPhilippe De Muyter static const struct seq_operations if6_seq_ops = {
30951da177e4SLinus Torvalds 	.start	= if6_seq_start,
30961da177e4SLinus Torvalds 	.next	= if6_seq_next,
30971da177e4SLinus Torvalds 	.show	= if6_seq_show,
30981da177e4SLinus Torvalds 	.stop	= if6_seq_stop,
30991da177e4SLinus Torvalds };
31001da177e4SLinus Torvalds 
31011da177e4SLinus Torvalds static int if6_seq_open(struct inode *inode, struct file *file)
31021da177e4SLinus Torvalds {
31033c40090aSDaniel Lezcano 	return seq_open_net(inode, file, &if6_seq_ops,
3104cf7732e4SPavel Emelyanov 			    sizeof(struct if6_iter_state));
31051da177e4SLinus Torvalds }
31061da177e4SLinus Torvalds 
31079a32144eSArjan van de Ven static const struct file_operations if6_fops = {
31081da177e4SLinus Torvalds 	.owner		= THIS_MODULE,
31091da177e4SLinus Torvalds 	.open		= if6_seq_open,
31101da177e4SLinus Torvalds 	.read		= seq_read,
31111da177e4SLinus Torvalds 	.llseek		= seq_lseek,
31123c40090aSDaniel Lezcano 	.release	= seq_release_net,
31131da177e4SLinus Torvalds };
31141da177e4SLinus Torvalds 
31152c8c1e72SAlexey Dobriyan static int __net_init if6_proc_net_init(struct net *net)
31161da177e4SLinus Torvalds {
31173c40090aSDaniel Lezcano 	if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops))
31181da177e4SLinus Torvalds 		return -ENOMEM;
31191da177e4SLinus Torvalds 	return 0;
31201da177e4SLinus Torvalds }
31211da177e4SLinus Torvalds 
31222c8c1e72SAlexey Dobriyan static void __net_exit if6_proc_net_exit(struct net *net)
31233c40090aSDaniel Lezcano {
31243c40090aSDaniel Lezcano        proc_net_remove(net, "if_inet6");
31253c40090aSDaniel Lezcano }
31263c40090aSDaniel Lezcano 
31273c40090aSDaniel Lezcano static struct pernet_operations if6_proc_net_ops = {
31283c40090aSDaniel Lezcano        .init = if6_proc_net_init,
31293c40090aSDaniel Lezcano        .exit = if6_proc_net_exit,
31303c40090aSDaniel Lezcano };
31313c40090aSDaniel Lezcano 
31323c40090aSDaniel Lezcano int __init if6_proc_init(void)
31333c40090aSDaniel Lezcano {
31343c40090aSDaniel Lezcano 	return register_pernet_subsys(&if6_proc_net_ops);
31353c40090aSDaniel Lezcano }
31363c40090aSDaniel Lezcano 
31371da177e4SLinus Torvalds void if6_proc_exit(void)
31381da177e4SLinus Torvalds {
31393c40090aSDaniel Lezcano 	unregister_pernet_subsys(&if6_proc_net_ops);
31401da177e4SLinus Torvalds }
31411da177e4SLinus Torvalds #endif	/* CONFIG_PROC_FS */
31421da177e4SLinus Torvalds 
314359fbb3a6SMasahide NAKAMURA #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
31443b9f9a1cSNoriaki TAKAMIYA /* Check if address is a home address configured on any interface. */
3145389f6612SDaniel Lezcano int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr)
31463b9f9a1cSNoriaki TAKAMIYA {
31473b9f9a1cSNoriaki TAKAMIYA 	int ret = 0;
3148c2e21293Sstephen hemminger 	struct inet6_ifaddr *ifp = NULL;
3149c2e21293Sstephen hemminger 	struct hlist_node *n;
31503a88a81dSstephen hemminger 	unsigned int hash = ipv6_addr_hash(addr);
3151c2e21293Sstephen hemminger 
31525c578aedSstephen hemminger 	rcu_read_lock_bh();
31534f70eccaSEric Dumazet 	hlist_for_each_entry_rcu_bh(ifp, n, &inet6_addr_lst[hash], addr_lst) {
3154878628fbSYOSHIFUJI Hideaki 		if (!net_eq(dev_net(ifp->idev->dev), net))
3155389f6612SDaniel Lezcano 			continue;
3156caad295fSYOSHIFUJI Hideaki 		if (ipv6_addr_equal(&ifp->addr, addr) &&
31573b9f9a1cSNoriaki TAKAMIYA 		    (ifp->flags & IFA_F_HOMEADDRESS)) {
31583b9f9a1cSNoriaki TAKAMIYA 			ret = 1;
31593b9f9a1cSNoriaki TAKAMIYA 			break;
31603b9f9a1cSNoriaki TAKAMIYA 		}
31613b9f9a1cSNoriaki TAKAMIYA 	}
31625c578aedSstephen hemminger 	rcu_read_unlock_bh();
31633b9f9a1cSNoriaki TAKAMIYA 	return ret;
31643b9f9a1cSNoriaki TAKAMIYA }
31653b9f9a1cSNoriaki TAKAMIYA #endif
31663b9f9a1cSNoriaki TAKAMIYA 
31671da177e4SLinus Torvalds /*
31681da177e4SLinus Torvalds  *	Periodic address status verification
31691da177e4SLinus Torvalds  */
31701da177e4SLinus Torvalds 
31711da177e4SLinus Torvalds static void addrconf_verify(unsigned long foo)
31721da177e4SLinus Torvalds {
3173b2db7564SYOSHIFUJI Hideaki 	unsigned long now, next, next_sec, next_sched;
31741da177e4SLinus Torvalds 	struct inet6_ifaddr *ifp;
3175c2e21293Sstephen hemminger 	struct hlist_node *node;
31761da177e4SLinus Torvalds 	int i;
31771da177e4SLinus Torvalds 
31785c578aedSstephen hemminger 	rcu_read_lock_bh();
31795c578aedSstephen hemminger 	spin_lock(&addrconf_verify_lock);
31801da177e4SLinus Torvalds 	now = jiffies;
3181b2db7564SYOSHIFUJI Hideaki 	next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY);
31821da177e4SLinus Torvalds 
31831da177e4SLinus Torvalds 	del_timer(&addr_chk_timer);
31841da177e4SLinus Torvalds 
31851da177e4SLinus Torvalds 	for (i = 0; i < IN6_ADDR_HSIZE; i++) {
31861da177e4SLinus Torvalds restart:
31874f70eccaSEric Dumazet 		hlist_for_each_entry_rcu_bh(ifp, node,
31885c578aedSstephen hemminger 					 &inet6_addr_lst[i], addr_lst) {
31891da177e4SLinus Torvalds 			unsigned long age;
31901da177e4SLinus Torvalds 
31911da177e4SLinus Torvalds 			if (ifp->flags & IFA_F_PERMANENT)
31921da177e4SLinus Torvalds 				continue;
31931da177e4SLinus Torvalds 
31941da177e4SLinus Torvalds 			spin_lock(&ifp->lock);
3195b2db7564SYOSHIFUJI Hideaki 			/* We try to batch several events at once. */
3196b2db7564SYOSHIFUJI Hideaki 			age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ;
31971da177e4SLinus Torvalds 
31988f27ebb9SYOSHIFUJI Hideaki 			if (ifp->valid_lft != INFINITY_LIFE_TIME &&
31998f27ebb9SYOSHIFUJI Hideaki 			    age >= ifp->valid_lft) {
32001da177e4SLinus Torvalds 				spin_unlock(&ifp->lock);
32011da177e4SLinus Torvalds 				in6_ifa_hold(ifp);
32021da177e4SLinus Torvalds 				ipv6_del_addr(ifp);
32031da177e4SLinus Torvalds 				goto restart;
32048f27ebb9SYOSHIFUJI Hideaki 			} else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
32058f27ebb9SYOSHIFUJI Hideaki 				spin_unlock(&ifp->lock);
32068f27ebb9SYOSHIFUJI Hideaki 				continue;
32071da177e4SLinus Torvalds 			} else if (age >= ifp->prefered_lft) {
3208a1ed0526SBrian Haley 				/* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
32091da177e4SLinus Torvalds 				int deprecate = 0;
32101da177e4SLinus Torvalds 
32111da177e4SLinus Torvalds 				if (!(ifp->flags&IFA_F_DEPRECATED)) {
32121da177e4SLinus Torvalds 					deprecate = 1;
32131da177e4SLinus Torvalds 					ifp->flags |= IFA_F_DEPRECATED;
32141da177e4SLinus Torvalds 				}
32151da177e4SLinus Torvalds 
32161da177e4SLinus Torvalds 				if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
32171da177e4SLinus Torvalds 					next = ifp->tstamp + ifp->valid_lft * HZ;
32181da177e4SLinus Torvalds 
32191da177e4SLinus Torvalds 				spin_unlock(&ifp->lock);
32201da177e4SLinus Torvalds 
32211da177e4SLinus Torvalds 				if (deprecate) {
32221da177e4SLinus Torvalds 					in6_ifa_hold(ifp);
32231da177e4SLinus Torvalds 
32241da177e4SLinus Torvalds 					ipv6_ifa_notify(0, ifp);
32251da177e4SLinus Torvalds 					in6_ifa_put(ifp);
32261da177e4SLinus Torvalds 					goto restart;
32271da177e4SLinus Torvalds 				}
32281da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY
32291da177e4SLinus Torvalds 			} else if ((ifp->flags&IFA_F_TEMPORARY) &&
32301da177e4SLinus Torvalds 				   !(ifp->flags&IFA_F_TENTATIVE)) {
323188949cf4Sstephen hemminger 				unsigned long regen_advance = ifp->idev->cnf.regen_max_retry *
323288949cf4Sstephen hemminger 					ifp->idev->cnf.dad_transmits *
323388949cf4Sstephen hemminger 					ifp->idev->nd_parms->retrans_time / HZ;
323488949cf4Sstephen hemminger 
32351da177e4SLinus Torvalds 				if (age >= ifp->prefered_lft - regen_advance) {
32361da177e4SLinus Torvalds 					struct inet6_ifaddr *ifpub = ifp->ifpub;
32371da177e4SLinus Torvalds 					if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
32381da177e4SLinus Torvalds 						next = ifp->tstamp + ifp->prefered_lft * HZ;
32391da177e4SLinus Torvalds 					if (!ifp->regen_count && ifpub) {
32401da177e4SLinus Torvalds 						ifp->regen_count++;
32411da177e4SLinus Torvalds 						in6_ifa_hold(ifp);
32421da177e4SLinus Torvalds 						in6_ifa_hold(ifpub);
32431da177e4SLinus Torvalds 						spin_unlock(&ifp->lock);
32445c578aedSstephen hemminger 
3245291d809bSHiroyuki YAMAMORI 						spin_lock(&ifpub->lock);
3246291d809bSHiroyuki YAMAMORI 						ifpub->regen_count = 0;
3247291d809bSHiroyuki YAMAMORI 						spin_unlock(&ifpub->lock);
32481da177e4SLinus Torvalds 						ipv6_create_tempaddr(ifpub, ifp);
32491da177e4SLinus Torvalds 						in6_ifa_put(ifpub);
32501da177e4SLinus Torvalds 						in6_ifa_put(ifp);
32511da177e4SLinus Torvalds 						goto restart;
32521da177e4SLinus Torvalds 					}
32531da177e4SLinus Torvalds 				} else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
32541da177e4SLinus Torvalds 					next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
32551da177e4SLinus Torvalds 				spin_unlock(&ifp->lock);
32561da177e4SLinus Torvalds #endif
32571da177e4SLinus Torvalds 			} else {
32581da177e4SLinus Torvalds 				/* ifp->prefered_lft <= ifp->valid_lft */
32591da177e4SLinus Torvalds 				if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
32601da177e4SLinus Torvalds 					next = ifp->tstamp + ifp->prefered_lft * HZ;
32611da177e4SLinus Torvalds 				spin_unlock(&ifp->lock);
32621da177e4SLinus Torvalds 			}
32631da177e4SLinus Torvalds 		}
32641da177e4SLinus Torvalds 	}
32651da177e4SLinus Torvalds 
3266b2db7564SYOSHIFUJI Hideaki 	next_sec = round_jiffies_up(next);
3267b2db7564SYOSHIFUJI Hideaki 	next_sched = next;
3268b2db7564SYOSHIFUJI Hideaki 
3269b2db7564SYOSHIFUJI Hideaki 	/* If rounded timeout is accurate enough, accept it. */
3270b2db7564SYOSHIFUJI Hideaki 	if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ))
3271b2db7564SYOSHIFUJI Hideaki 		next_sched = next_sec;
3272b2db7564SYOSHIFUJI Hideaki 
3273b2db7564SYOSHIFUJI Hideaki 	/* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
3274b2db7564SYOSHIFUJI Hideaki 	if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX))
3275b2db7564SYOSHIFUJI Hideaki 		next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX;
3276b2db7564SYOSHIFUJI Hideaki 
3277b2db7564SYOSHIFUJI Hideaki 	ADBG((KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
3278b2db7564SYOSHIFUJI Hideaki 	      now, next, next_sec, next_sched));
3279b2db7564SYOSHIFUJI Hideaki 
3280b2db7564SYOSHIFUJI Hideaki 	addr_chk_timer.expires = next_sched;
32811da177e4SLinus Torvalds 	add_timer(&addr_chk_timer);
32825c578aedSstephen hemminger 	spin_unlock(&addrconf_verify_lock);
32835c578aedSstephen hemminger 	rcu_read_unlock_bh();
32841da177e4SLinus Torvalds }
32851da177e4SLinus Torvalds 
3286461d8837SThomas Graf static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
3287461d8837SThomas Graf {
3288461d8837SThomas Graf 	struct in6_addr *pfx = NULL;
3289461d8837SThomas Graf 
3290461d8837SThomas Graf 	if (addr)
3291461d8837SThomas Graf 		pfx = nla_data(addr);
3292461d8837SThomas Graf 
3293461d8837SThomas Graf 	if (local) {
3294461d8837SThomas Graf 		if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
3295461d8837SThomas Graf 			pfx = NULL;
3296461d8837SThomas Graf 		else
3297461d8837SThomas Graf 			pfx = nla_data(local);
3298461d8837SThomas Graf 	}
3299461d8837SThomas Graf 
3300461d8837SThomas Graf 	return pfx;
3301461d8837SThomas Graf }
3302461d8837SThomas Graf 
3303ef7c79edSPatrick McHardy static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
3304461d8837SThomas Graf 	[IFA_ADDRESS]		= { .len = sizeof(struct in6_addr) },
3305461d8837SThomas Graf 	[IFA_LOCAL]		= { .len = sizeof(struct in6_addr) },
3306461d8837SThomas Graf 	[IFA_CACHEINFO]		= { .len = sizeof(struct ifa_cacheinfo) },
3307461d8837SThomas Graf };
3308461d8837SThomas Graf 
33091da177e4SLinus Torvalds static int
33101da177e4SLinus Torvalds inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
33111da177e4SLinus Torvalds {
33123b1e0a65SYOSHIFUJI Hideaki 	struct net *net = sock_net(skb->sk);
3313b933f716SThomas Graf 	struct ifaddrmsg *ifm;
3314b933f716SThomas Graf 	struct nlattr *tb[IFA_MAX+1];
33151da177e4SLinus Torvalds 	struct in6_addr *pfx;
3316b933f716SThomas Graf 	int err;
33171da177e4SLinus Torvalds 
3318b933f716SThomas Graf 	err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3319b933f716SThomas Graf 	if (err < 0)
3320b933f716SThomas Graf 		return err;
3321b933f716SThomas Graf 
3322b933f716SThomas Graf 	ifm = nlmsg_data(nlh);
3323b933f716SThomas Graf 	pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
33241da177e4SLinus Torvalds 	if (pfx == NULL)
33251da177e4SLinus Torvalds 		return -EINVAL;
33261da177e4SLinus Torvalds 
3327af284937SDaniel Lezcano 	return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen);
33281da177e4SLinus Torvalds }
33291da177e4SLinus Torvalds 
333055ebaef1SNoriaki TAKAMIYA static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
333155ebaef1SNoriaki TAKAMIYA 			     u32 prefered_lft, u32 valid_lft)
3332081bba5bSNoriaki TAKAMIYA {
33336f704992SYOSHIFUJI Hideaki 	u32 flags;
33346f704992SYOSHIFUJI Hideaki 	clock_t expires;
33354bed72e4SYOSHIFUJI Hideaki 	unsigned long timeout;
333646d48046SYOSHIFUJI Hideaki 
3337081bba5bSNoriaki TAKAMIYA 	if (!valid_lft || (prefered_lft > valid_lft))
3338081bba5bSNoriaki TAKAMIYA 		return -EINVAL;
3339081bba5bSNoriaki TAKAMIYA 
33404bed72e4SYOSHIFUJI Hideaki 	timeout = addrconf_timeout_fixup(valid_lft, HZ);
33414bed72e4SYOSHIFUJI Hideaki 	if (addrconf_finite_timeout(timeout)) {
33424bed72e4SYOSHIFUJI Hideaki 		expires = jiffies_to_clock_t(timeout * HZ);
33434bed72e4SYOSHIFUJI Hideaki 		valid_lft = timeout;
33446f704992SYOSHIFUJI Hideaki 		flags = RTF_EXPIRES;
33454bed72e4SYOSHIFUJI Hideaki 	} else {
33464bed72e4SYOSHIFUJI Hideaki 		expires = 0;
33474bed72e4SYOSHIFUJI Hideaki 		flags = 0;
33484bed72e4SYOSHIFUJI Hideaki 		ifa_flags |= IFA_F_PERMANENT;
33496f704992SYOSHIFUJI Hideaki 	}
3350081bba5bSNoriaki TAKAMIYA 
33514bed72e4SYOSHIFUJI Hideaki 	timeout = addrconf_timeout_fixup(prefered_lft, HZ);
33524bed72e4SYOSHIFUJI Hideaki 	if (addrconf_finite_timeout(timeout)) {
33534bed72e4SYOSHIFUJI Hideaki 		if (timeout == 0)
335455ebaef1SNoriaki TAKAMIYA 			ifa_flags |= IFA_F_DEPRECATED;
33554bed72e4SYOSHIFUJI Hideaki 		prefered_lft = timeout;
33564bed72e4SYOSHIFUJI Hideaki 	}
3357081bba5bSNoriaki TAKAMIYA 
3358081bba5bSNoriaki TAKAMIYA 	spin_lock_bh(&ifp->lock);
33593b9f9a1cSNoriaki TAKAMIYA 	ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
3360081bba5bSNoriaki TAKAMIYA 	ifp->tstamp = jiffies;
3361081bba5bSNoriaki TAKAMIYA 	ifp->valid_lft = valid_lft;
3362081bba5bSNoriaki TAKAMIYA 	ifp->prefered_lft = prefered_lft;
3363081bba5bSNoriaki TAKAMIYA 
3364081bba5bSNoriaki TAKAMIYA 	spin_unlock_bh(&ifp->lock);
3365081bba5bSNoriaki TAKAMIYA 	if (!(ifp->flags&IFA_F_TENTATIVE))
3366081bba5bSNoriaki TAKAMIYA 		ipv6_ifa_notify(0, ifp);
3367081bba5bSNoriaki TAKAMIYA 
336846d48046SYOSHIFUJI Hideaki 	addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
33696f704992SYOSHIFUJI Hideaki 			      expires, flags);
3370081bba5bSNoriaki TAKAMIYA 	addrconf_verify(0);
3371081bba5bSNoriaki TAKAMIYA 
3372081bba5bSNoriaki TAKAMIYA 	return 0;
3373081bba5bSNoriaki TAKAMIYA }
3374081bba5bSNoriaki TAKAMIYA 
3375081bba5bSNoriaki TAKAMIYA static int
33761da177e4SLinus Torvalds inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
33771da177e4SLinus Torvalds {
33783b1e0a65SYOSHIFUJI Hideaki 	struct net *net = sock_net(skb->sk);
3379461d8837SThomas Graf 	struct ifaddrmsg *ifm;
3380461d8837SThomas Graf 	struct nlattr *tb[IFA_MAX+1];
33811da177e4SLinus Torvalds 	struct in6_addr *pfx;
33827198f8ceSThomas Graf 	struct inet6_ifaddr *ifa;
33837198f8ceSThomas Graf 	struct net_device *dev;
338455ebaef1SNoriaki TAKAMIYA 	u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
338555ebaef1SNoriaki TAKAMIYA 	u8 ifa_flags;
3386461d8837SThomas Graf 	int err;
33871da177e4SLinus Torvalds 
3388461d8837SThomas Graf 	err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3389461d8837SThomas Graf 	if (err < 0)
3390461d8837SThomas Graf 		return err;
3391461d8837SThomas Graf 
3392461d8837SThomas Graf 	ifm = nlmsg_data(nlh);
3393461d8837SThomas Graf 	pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
33941da177e4SLinus Torvalds 	if (pfx == NULL)
33951da177e4SLinus Torvalds 		return -EINVAL;
33961da177e4SLinus Torvalds 
3397461d8837SThomas Graf 	if (tb[IFA_CACHEINFO]) {
33980778769dSNoriaki TAKAMIYA 		struct ifa_cacheinfo *ci;
3399461d8837SThomas Graf 
3400461d8837SThomas Graf 		ci = nla_data(tb[IFA_CACHEINFO]);
34010778769dSNoriaki TAKAMIYA 		valid_lft = ci->ifa_valid;
3402461d8837SThomas Graf 		preferred_lft = ci->ifa_prefered;
3403461d8837SThomas Graf 	} else {
3404461d8837SThomas Graf 		preferred_lft = INFINITY_LIFE_TIME;
3405461d8837SThomas Graf 		valid_lft = INFINITY_LIFE_TIME;
34060778769dSNoriaki TAKAMIYA 	}
34070778769dSNoriaki TAKAMIYA 
3408af284937SDaniel Lezcano 	dev =  __dev_get_by_index(net, ifm->ifa_index);
34097198f8ceSThomas Graf 	if (dev == NULL)
34107198f8ceSThomas Graf 		return -ENODEV;
3411081bba5bSNoriaki TAKAMIYA 
341255ebaef1SNoriaki TAKAMIYA 	/* We ignore other flags so far. */
34133b9f9a1cSNoriaki TAKAMIYA 	ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
341455ebaef1SNoriaki TAKAMIYA 
34151cab3da6SDaniel Lezcano 	ifa = ipv6_get_ifaddr(net, pfx, dev, 1);
34167198f8ceSThomas Graf 	if (ifa == NULL) {
34177198f8ceSThomas Graf 		/*
34187198f8ceSThomas Graf 		 * It would be best to check for !NLM_F_CREATE here but
34197198f8ceSThomas Graf 		 * userspace alreay relies on not having to provide this.
34207198f8ceSThomas Graf 		 */
3421af284937SDaniel Lezcano 		return inet6_addr_add(net, ifm->ifa_index, pfx,
3422af284937SDaniel Lezcano 				      ifm->ifa_prefixlen, ifa_flags,
3423af284937SDaniel Lezcano 				      preferred_lft, valid_lft);
34241da177e4SLinus Torvalds 	}
34251da177e4SLinus Torvalds 
34267198f8ceSThomas Graf 	if (nlh->nlmsg_flags & NLM_F_EXCL ||
34277198f8ceSThomas Graf 	    !(nlh->nlmsg_flags & NLM_F_REPLACE))
34287198f8ceSThomas Graf 		err = -EEXIST;
34297198f8ceSThomas Graf 	else
343055ebaef1SNoriaki TAKAMIYA 		err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
34317198f8ceSThomas Graf 
34327198f8ceSThomas Graf 	in6_ifa_put(ifa);
34337198f8ceSThomas Graf 
34347198f8ceSThomas Graf 	return err;
34357198f8ceSThomas Graf }
34367198f8ceSThomas Graf 
3437101bb229SThomas Graf static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3438101bb229SThomas Graf 			  u8 scope, int ifindex)
3439101bb229SThomas Graf {
3440101bb229SThomas Graf 	struct ifaddrmsg *ifm;
3441101bb229SThomas Graf 
3442101bb229SThomas Graf 	ifm = nlmsg_data(nlh);
3443101bb229SThomas Graf 	ifm->ifa_family = AF_INET6;
3444101bb229SThomas Graf 	ifm->ifa_prefixlen = prefixlen;
3445101bb229SThomas Graf 	ifm->ifa_flags = flags;
3446101bb229SThomas Graf 	ifm->ifa_scope = scope;
3447101bb229SThomas Graf 	ifm->ifa_index = ifindex;
3448101bb229SThomas Graf }
3449101bb229SThomas Graf 
345085486af0SThomas Graf static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
345185486af0SThomas Graf 			 unsigned long tstamp, u32 preferred, u32 valid)
345285486af0SThomas Graf {
345385486af0SThomas Graf 	struct ifa_cacheinfo ci;
345485486af0SThomas Graf 
345585486af0SThomas Graf 	ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100
345685486af0SThomas Graf 			+ TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
345785486af0SThomas Graf 	ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100
345885486af0SThomas Graf 			+ TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
345985486af0SThomas Graf 	ci.ifa_prefered = preferred;
346085486af0SThomas Graf 	ci.ifa_valid = valid;
346185486af0SThomas Graf 
346285486af0SThomas Graf 	return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
346385486af0SThomas Graf }
346485486af0SThomas Graf 
3465101bb229SThomas Graf static inline int rt_scope(int ifa_scope)
3466101bb229SThomas Graf {
3467101bb229SThomas Graf 	if (ifa_scope & IFA_HOST)
3468101bb229SThomas Graf 		return RT_SCOPE_HOST;
3469101bb229SThomas Graf 	else if (ifa_scope & IFA_LINK)
3470101bb229SThomas Graf 		return RT_SCOPE_LINK;
3471101bb229SThomas Graf 	else if (ifa_scope & IFA_SITE)
3472101bb229SThomas Graf 		return RT_SCOPE_SITE;
3473101bb229SThomas Graf 	else
3474101bb229SThomas Graf 		return RT_SCOPE_UNIVERSE;
3475101bb229SThomas Graf }
3476101bb229SThomas Graf 
34770ab6803bSThomas Graf static inline int inet6_ifaddr_msgsize(void)
34780ab6803bSThomas Graf {
3479339bf98fSThomas Graf 	return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3480339bf98fSThomas Graf 	       + nla_total_size(16) /* IFA_ADDRESS */
3481339bf98fSThomas Graf 	       + nla_total_size(sizeof(struct ifa_cacheinfo));
34820ab6803bSThomas Graf }
3483c5396a31SYOSHIFUJI Hideaki 
34841da177e4SLinus Torvalds static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
3485b6544c0bSJamal Hadi Salim 			     u32 pid, u32 seq, int event, unsigned int flags)
34861da177e4SLinus Torvalds {
34871da177e4SLinus Torvalds 	struct nlmsghdr  *nlh;
348885486af0SThomas Graf 	u32 preferred, valid;
34891da177e4SLinus Torvalds 
34900ab6803bSThomas Graf 	nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
34910ab6803bSThomas Graf 	if (nlh == NULL)
349226932566SPatrick McHardy 		return -EMSGSIZE;
34930ab6803bSThomas Graf 
3494101bb229SThomas Graf 	put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3495101bb229SThomas Graf 		      ifa->idev->dev->ifindex);
3496101bb229SThomas Graf 
34971da177e4SLinus Torvalds 	if (!(ifa->flags&IFA_F_PERMANENT)) {
349885486af0SThomas Graf 		preferred = ifa->prefered_lft;
349985486af0SThomas Graf 		valid = ifa->valid_lft;
350085486af0SThomas Graf 		if (preferred != INFINITY_LIFE_TIME) {
35011da177e4SLinus Torvalds 			long tval = (jiffies - ifa->tstamp)/HZ;
3502a1faa698SJens Rosenboom 			if (preferred > tval)
350385486af0SThomas Graf 				preferred -= tval;
3504a1faa698SJens Rosenboom 			else
3505a1faa698SJens Rosenboom 				preferred = 0;
3506f56619fcSBen Hutchings 			if (valid != INFINITY_LIFE_TIME) {
3507f56619fcSBen Hutchings 				if (valid > tval)
350885486af0SThomas Graf 					valid -= tval;
3509f56619fcSBen Hutchings 				else
3510f56619fcSBen Hutchings 					valid = 0;
3511f56619fcSBen Hutchings 			}
35121da177e4SLinus Torvalds 		}
35131da177e4SLinus Torvalds 	} else {
351485486af0SThomas Graf 		preferred = INFINITY_LIFE_TIME;
351585486af0SThomas Graf 		valid = INFINITY_LIFE_TIME;
35161da177e4SLinus Torvalds 	}
351785486af0SThomas Graf 
35180ab6803bSThomas Graf 	if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
351926932566SPatrick McHardy 	    put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
352026932566SPatrick McHardy 		nlmsg_cancel(skb, nlh);
352126932566SPatrick McHardy 		return -EMSGSIZE;
352226932566SPatrick McHardy 	}
352385486af0SThomas Graf 
35240ab6803bSThomas Graf 	return nlmsg_end(skb, nlh);
35251da177e4SLinus Torvalds }
35261da177e4SLinus Torvalds 
35271da177e4SLinus Torvalds static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
3528e431b8c0SJamal Hadi Salim 				u32 pid, u32 seq, int event, u16 flags)
35291da177e4SLinus Torvalds {
35301da177e4SLinus Torvalds 	struct nlmsghdr  *nlh;
3531101bb229SThomas Graf 	u8 scope = RT_SCOPE_UNIVERSE;
3532101bb229SThomas Graf 	int ifindex = ifmca->idev->dev->ifindex;
35331da177e4SLinus Torvalds 
35341da177e4SLinus Torvalds 	if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3535101bb229SThomas Graf 		scope = RT_SCOPE_SITE;
3536101bb229SThomas Graf 
35370ab6803bSThomas Graf 	nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
35380ab6803bSThomas Graf 	if (nlh == NULL)
353926932566SPatrick McHardy 		return -EMSGSIZE;
35400ab6803bSThomas Graf 
3541101bb229SThomas Graf 	put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
35420ab6803bSThomas Graf 	if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
35430ab6803bSThomas Graf 	    put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
354426932566SPatrick McHardy 			  INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
354526932566SPatrick McHardy 		nlmsg_cancel(skb, nlh);
354626932566SPatrick McHardy 		return -EMSGSIZE;
354726932566SPatrick McHardy 	}
354885486af0SThomas Graf 
35490ab6803bSThomas Graf 	return nlmsg_end(skb, nlh);
35501da177e4SLinus Torvalds }
35511da177e4SLinus Torvalds 
35521da177e4SLinus Torvalds static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
3553b6544c0bSJamal Hadi Salim 				u32 pid, u32 seq, int event, unsigned int flags)
35541da177e4SLinus Torvalds {
35551da177e4SLinus Torvalds 	struct nlmsghdr  *nlh;
3556101bb229SThomas Graf 	u8 scope = RT_SCOPE_UNIVERSE;
3557101bb229SThomas Graf 	int ifindex = ifaca->aca_idev->dev->ifindex;
35581da177e4SLinus Torvalds 
35591da177e4SLinus Torvalds 	if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3560101bb229SThomas Graf 		scope = RT_SCOPE_SITE;
3561101bb229SThomas Graf 
35620ab6803bSThomas Graf 	nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
35630ab6803bSThomas Graf 	if (nlh == NULL)
356426932566SPatrick McHardy 		return -EMSGSIZE;
35650ab6803bSThomas Graf 
3566101bb229SThomas Graf 	put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
35670ab6803bSThomas Graf 	if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
35680ab6803bSThomas Graf 	    put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
356926932566SPatrick McHardy 			  INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
357026932566SPatrick McHardy 		nlmsg_cancel(skb, nlh);
357126932566SPatrick McHardy 		return -EMSGSIZE;
357226932566SPatrick McHardy 	}
357385486af0SThomas Graf 
35740ab6803bSThomas Graf 	return nlmsg_end(skb, nlh);
35751da177e4SLinus Torvalds }
35761da177e4SLinus Torvalds 
3577e21e8467SStephen Hemminger enum addr_type_t {
35781da177e4SLinus Torvalds 	UNICAST_ADDR,
35791da177e4SLinus Torvalds 	MULTICAST_ADDR,
35801da177e4SLinus Torvalds 	ANYCAST_ADDR,
35811da177e4SLinus Torvalds };
35821da177e4SLinus Torvalds 
3583234b27c3SEric Dumazet /* called with rcu_read_lock() */
3584234b27c3SEric Dumazet static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb,
3585234b27c3SEric Dumazet 			  struct netlink_callback *cb, enum addr_type_t type,
3586234b27c3SEric Dumazet 			  int s_ip_idx, int *p_ip_idx)
35871da177e4SLinus Torvalds {
35881da177e4SLinus Torvalds 	struct ifmcaddr6 *ifmca;
35891da177e4SLinus Torvalds 	struct ifacaddr6 *ifaca;
3590234b27c3SEric Dumazet 	int err = 1;
3591234b27c3SEric Dumazet 	int ip_idx = *p_ip_idx;
35921da177e4SLinus Torvalds 
35931da177e4SLinus Torvalds 	read_lock_bh(&idev->lock);
35941da177e4SLinus Torvalds 	switch (type) {
3595502a2ffdSstephen hemminger 	case UNICAST_ADDR: {
3596502a2ffdSstephen hemminger 		struct inet6_ifaddr *ifa;
3597502a2ffdSstephen hemminger 
3598ae9cda5dSYOSHIFUJI Hideaki 		/* unicast address incl. temp addr */
3599502a2ffdSstephen hemminger 		list_for_each_entry(ifa, &idev->addr_list, if_list) {
3600502a2ffdSstephen hemminger 			if (++ip_idx < s_ip_idx)
36011da177e4SLinus Torvalds 				continue;
36025d5619b4SYOSHIFUJI Hideaki 			err = inet6_fill_ifaddr(skb, ifa,
36031da177e4SLinus Torvalds 						NETLINK_CB(cb->skb).pid,
36045d5619b4SYOSHIFUJI Hideaki 						cb->nlh->nlmsg_seq,
36055d5619b4SYOSHIFUJI Hideaki 						RTM_NEWADDR,
36065d5619b4SYOSHIFUJI Hideaki 						NLM_F_MULTI);
3607bcd32326SEric Dumazet 			if (err <= 0)
3608bcd32326SEric Dumazet 				break;
36091da177e4SLinus Torvalds 		}
36101da177e4SLinus Torvalds 		break;
3611502a2ffdSstephen hemminger 	}
36121da177e4SLinus Torvalds 	case MULTICAST_ADDR:
36131da177e4SLinus Torvalds 		/* multicast address */
36141da177e4SLinus Torvalds 		for (ifmca = idev->mc_list; ifmca;
36151da177e4SLinus Torvalds 		     ifmca = ifmca->next, ip_idx++) {
36161da177e4SLinus Torvalds 			if (ip_idx < s_ip_idx)
36171da177e4SLinus Torvalds 				continue;
36185d5619b4SYOSHIFUJI Hideaki 			err = inet6_fill_ifmcaddr(skb, ifmca,
36191da177e4SLinus Torvalds 						  NETLINK_CB(cb->skb).pid,
36205d5619b4SYOSHIFUJI Hideaki 						  cb->nlh->nlmsg_seq,
36215d5619b4SYOSHIFUJI Hideaki 						  RTM_GETMULTICAST,
36225d5619b4SYOSHIFUJI Hideaki 						  NLM_F_MULTI);
3623bcd32326SEric Dumazet 			if (err <= 0)
3624bcd32326SEric Dumazet 				break;
36251da177e4SLinus Torvalds 		}
36261da177e4SLinus Torvalds 		break;
36271da177e4SLinus Torvalds 	case ANYCAST_ADDR:
36281da177e4SLinus Torvalds 		/* anycast address */
36291da177e4SLinus Torvalds 		for (ifaca = idev->ac_list; ifaca;
36301da177e4SLinus Torvalds 		     ifaca = ifaca->aca_next, ip_idx++) {
36311da177e4SLinus Torvalds 			if (ip_idx < s_ip_idx)
36321da177e4SLinus Torvalds 				continue;
36335d5619b4SYOSHIFUJI Hideaki 			err = inet6_fill_ifacaddr(skb, ifaca,
36341da177e4SLinus Torvalds 						  NETLINK_CB(cb->skb).pid,
36355d5619b4SYOSHIFUJI Hideaki 						  cb->nlh->nlmsg_seq,
36365d5619b4SYOSHIFUJI Hideaki 						  RTM_GETANYCAST,
36375d5619b4SYOSHIFUJI Hideaki 						  NLM_F_MULTI);
3638bcd32326SEric Dumazet 			if (err <= 0)
3639bcd32326SEric Dumazet 				break;
36401da177e4SLinus Torvalds 		}
36411da177e4SLinus Torvalds 		break;
36421da177e4SLinus Torvalds 	default:
36431da177e4SLinus Torvalds 		break;
36441da177e4SLinus Torvalds 	}
36451da177e4SLinus Torvalds 	read_unlock_bh(&idev->lock);
3646234b27c3SEric Dumazet 	*p_ip_idx = ip_idx;
3647234b27c3SEric Dumazet 	return err;
3648234b27c3SEric Dumazet }
36495d5619b4SYOSHIFUJI Hideaki 
3650234b27c3SEric Dumazet static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3651234b27c3SEric Dumazet 			   enum addr_type_t type)
3652234b27c3SEric Dumazet {
3653234b27c3SEric Dumazet 	struct net *net = sock_net(skb->sk);
3654234b27c3SEric Dumazet 	int h, s_h;
3655234b27c3SEric Dumazet 	int idx, ip_idx;
3656234b27c3SEric Dumazet 	int s_idx, s_ip_idx;
3657234b27c3SEric Dumazet 	struct net_device *dev;
3658234b27c3SEric Dumazet 	struct inet6_dev *idev;
3659234b27c3SEric Dumazet 	struct hlist_head *head;
3660234b27c3SEric Dumazet 	struct hlist_node *node;
3661234b27c3SEric Dumazet 
3662234b27c3SEric Dumazet 	s_h = cb->args[0];
3663234b27c3SEric Dumazet 	s_idx = idx = cb->args[1];
3664234b27c3SEric Dumazet 	s_ip_idx = ip_idx = cb->args[2];
3665234b27c3SEric Dumazet 
3666234b27c3SEric Dumazet 	rcu_read_lock();
3667234b27c3SEric Dumazet 	for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3668234b27c3SEric Dumazet 		idx = 0;
3669234b27c3SEric Dumazet 		head = &net->dev_index_head[h];
3670234b27c3SEric Dumazet 		hlist_for_each_entry_rcu(dev, node, head, index_hlist) {
3671234b27c3SEric Dumazet 			if (idx < s_idx)
3672234b27c3SEric Dumazet 				goto cont;
36734b97efdfSPatrick McHardy 			if (h > s_h || idx > s_idx)
3674234b27c3SEric Dumazet 				s_ip_idx = 0;
3675234b27c3SEric Dumazet 			ip_idx = 0;
3676e21e8467SStephen Hemminger 			idev = __in6_dev_get(dev);
3677e21e8467SStephen Hemminger 			if (!idev)
3678234b27c3SEric Dumazet 				goto cont;
3679234b27c3SEric Dumazet 
3680234b27c3SEric Dumazet 			if (in6_dump_addrs(idev, skb, cb, type,
3681234b27c3SEric Dumazet 					   s_ip_idx, &ip_idx) <= 0)
3682234b27c3SEric Dumazet 				goto done;
36837562f876SPavel Emelianov cont:
36847562f876SPavel Emelianov 			idx++;
36851da177e4SLinus Torvalds 		}
3686234b27c3SEric Dumazet 	}
3687234b27c3SEric Dumazet done:
3688234b27c3SEric Dumazet 	rcu_read_unlock();
3689234b27c3SEric Dumazet 	cb->args[0] = h;
3690234b27c3SEric Dumazet 	cb->args[1] = idx;
3691234b27c3SEric Dumazet 	cb->args[2] = ip_idx;
3692234b27c3SEric Dumazet 
36931da177e4SLinus Torvalds 	return skb->len;
36941da177e4SLinus Torvalds }
36951da177e4SLinus Torvalds 
36961da177e4SLinus Torvalds static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
36971da177e4SLinus Torvalds {
36981da177e4SLinus Torvalds 	enum addr_type_t type = UNICAST_ADDR;
3699b854272bSDenis V. Lunev 
37001da177e4SLinus Torvalds 	return inet6_dump_addr(skb, cb, type);
37011da177e4SLinus Torvalds }
37021da177e4SLinus Torvalds 
37031da177e4SLinus Torvalds static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
37041da177e4SLinus Torvalds {
37051da177e4SLinus Torvalds 	enum addr_type_t type = MULTICAST_ADDR;
3706b854272bSDenis V. Lunev 
37071da177e4SLinus Torvalds 	return inet6_dump_addr(skb, cb, type);
37081da177e4SLinus Torvalds }
37091da177e4SLinus Torvalds 
37101da177e4SLinus Torvalds 
37111da177e4SLinus Torvalds static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
37121da177e4SLinus Torvalds {
37131da177e4SLinus Torvalds 	enum addr_type_t type = ANYCAST_ADDR;
3714b854272bSDenis V. Lunev 
37151da177e4SLinus Torvalds 	return inet6_dump_addr(skb, cb, type);
37161da177e4SLinus Torvalds }
37171da177e4SLinus Torvalds 
37181b29fc2cSThomas Graf static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
37191b29fc2cSThomas Graf 			     void *arg)
37206c223828SNoriaki TAKAMIYA {
37213b1e0a65SYOSHIFUJI Hideaki 	struct net *net = sock_net(in_skb->sk);
37221b29fc2cSThomas Graf 	struct ifaddrmsg *ifm;
37231b29fc2cSThomas Graf 	struct nlattr *tb[IFA_MAX+1];
37246c223828SNoriaki TAKAMIYA 	struct in6_addr *addr = NULL;
37256c223828SNoriaki TAKAMIYA 	struct net_device *dev = NULL;
37266c223828SNoriaki TAKAMIYA 	struct inet6_ifaddr *ifa;
37276c223828SNoriaki TAKAMIYA 	struct sk_buff *skb;
37286c223828SNoriaki TAKAMIYA 	int err;
37296c223828SNoriaki TAKAMIYA 
37301b29fc2cSThomas Graf 	err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
37311b29fc2cSThomas Graf 	if (err < 0)
37321b29fc2cSThomas Graf 		goto errout;
37336c223828SNoriaki TAKAMIYA 
37341b29fc2cSThomas Graf 	addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
37351b29fc2cSThomas Graf 	if (addr == NULL) {
37361b29fc2cSThomas Graf 		err = -EINVAL;
37371b29fc2cSThomas Graf 		goto errout;
37381b29fc2cSThomas Graf 	}
37391b29fc2cSThomas Graf 
37401b29fc2cSThomas Graf 	ifm = nlmsg_data(nlh);
37416c223828SNoriaki TAKAMIYA 	if (ifm->ifa_index)
37426fda7350SBenjamin Thery 		dev = __dev_get_by_index(net, ifm->ifa_index);
37436c223828SNoriaki TAKAMIYA 
3744e21e8467SStephen Hemminger 	ifa = ipv6_get_ifaddr(net, addr, dev, 1);
3745e21e8467SStephen Hemminger 	if (!ifa) {
37461b29fc2cSThomas Graf 		err = -EADDRNOTAVAIL;
37471b29fc2cSThomas Graf 		goto errout;
37486c223828SNoriaki TAKAMIYA 	}
37496c223828SNoriaki TAKAMIYA 
3750e21e8467SStephen Hemminger 	skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL);
3751e21e8467SStephen Hemminger 	if (!skb) {
37521b29fc2cSThomas Graf 		err = -ENOBUFS;
37531b29fc2cSThomas Graf 		goto errout_ifa;
37541b29fc2cSThomas Graf 	}
37551b29fc2cSThomas Graf 
37566c223828SNoriaki TAKAMIYA 	err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
37576c223828SNoriaki TAKAMIYA 				nlh->nlmsg_seq, RTM_NEWADDR, 0);
375826932566SPatrick McHardy 	if (err < 0) {
375926932566SPatrick McHardy 		/* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
376026932566SPatrick McHardy 		WARN_ON(err == -EMSGSIZE);
376126932566SPatrick McHardy 		kfree_skb(skb);
376226932566SPatrick McHardy 		goto errout_ifa;
376326932566SPatrick McHardy 	}
37646fda7350SBenjamin Thery 	err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid);
37651b29fc2cSThomas Graf errout_ifa:
37666c223828SNoriaki TAKAMIYA 	in6_ifa_put(ifa);
37671b29fc2cSThomas Graf errout:
37686c223828SNoriaki TAKAMIYA 	return err;
37696c223828SNoriaki TAKAMIYA }
37706c223828SNoriaki TAKAMIYA 
37711da177e4SLinus Torvalds static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
37721da177e4SLinus Torvalds {
37731da177e4SLinus Torvalds 	struct sk_buff *skb;
3774c346dca1SYOSHIFUJI Hideaki 	struct net *net = dev_net(ifa->idev->dev);
37755d620266SThomas Graf 	int err = -ENOBUFS;
37761da177e4SLinus Torvalds 
37770ab6803bSThomas Graf 	skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
37785d620266SThomas Graf 	if (skb == NULL)
37795d620266SThomas Graf 		goto errout;
37805d620266SThomas Graf 
37815d620266SThomas Graf 	err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
378226932566SPatrick McHardy 	if (err < 0) {
378326932566SPatrick McHardy 		/* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
378426932566SPatrick McHardy 		WARN_ON(err == -EMSGSIZE);
378526932566SPatrick McHardy 		kfree_skb(skb);
378626932566SPatrick McHardy 		goto errout;
378726932566SPatrick McHardy 	}
37881ce85fe4SPablo Neira Ayuso 	rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
37891ce85fe4SPablo Neira Ayuso 	return;
37905d620266SThomas Graf errout:
37915d620266SThomas Graf 	if (err < 0)
37926fda7350SBenjamin Thery 		rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
37931da177e4SLinus Torvalds }
37941da177e4SLinus Torvalds 
3795b6f99a21SDave Jones static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
37961da177e4SLinus Torvalds 				__s32 *array, int bytes)
37971da177e4SLinus Torvalds {
379804561c1fSThomas Graf 	BUG_ON(bytes < (DEVCONF_MAX * 4));
379904561c1fSThomas Graf 
38001da177e4SLinus Torvalds 	memset(array, 0, bytes);
38011da177e4SLinus Torvalds 	array[DEVCONF_FORWARDING] = cnf->forwarding;
38021da177e4SLinus Torvalds 	array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
38031da177e4SLinus Torvalds 	array[DEVCONF_MTU6] = cnf->mtu6;
38041da177e4SLinus Torvalds 	array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
38051da177e4SLinus Torvalds 	array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
38061da177e4SLinus Torvalds 	array[DEVCONF_AUTOCONF] = cnf->autoconf;
38071da177e4SLinus Torvalds 	array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
38081da177e4SLinus Torvalds 	array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
38091da177e4SLinus Torvalds 	array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
38101da177e4SLinus Torvalds 	array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
38111da177e4SLinus Torvalds 	array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
38121da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY
38131da177e4SLinus Torvalds 	array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
38141da177e4SLinus Torvalds 	array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
38151da177e4SLinus Torvalds 	array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
38161da177e4SLinus Torvalds 	array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
38171da177e4SLinus Torvalds 	array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
38181da177e4SLinus Torvalds #endif
38191da177e4SLinus Torvalds 	array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
382065f5c7c1SYOSHIFUJI Hideaki 	array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
3821c4fd30ebSYOSHIFUJI Hideaki 	array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
3822930d6ff2SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_ROUTER_PREF
3823930d6ff2SYOSHIFUJI Hideaki 	array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
382452e16356SYOSHIFUJI Hideaki 	array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
3825fa03ef38SNeil Horman #ifdef CONFIG_IPV6_ROUTE_INFO
382609c884d4SYOSHIFUJI Hideaki 	array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
382709c884d4SYOSHIFUJI Hideaki #endif
3828930d6ff2SYOSHIFUJI Hideaki #endif
3829fbea49e1SYOSHIFUJI Hideaki 	array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
38300bcbc926SYOSHIFUJI Hideaki 	array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
383195c385b4SNeil Horman #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
383295c385b4SNeil Horman 	array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
383395c385b4SNeil Horman #endif
38347bc570c8SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_MROUTE
38357bc570c8SYOSHIFUJI Hideaki 	array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding;
38367bc570c8SYOSHIFUJI Hideaki #endif
3837778d80beSYOSHIFUJI Hideaki 	array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6;
38381b34be74SYOSHIFUJI Hideaki 	array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad;
3839c3faca05SCosmin Ratiu 	array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao;
38401da177e4SLinus Torvalds }
38411da177e4SLinus Torvalds 
3842339bf98fSThomas Graf static inline size_t inet6_if_nlmsg_size(void)
3843339bf98fSThomas Graf {
3844339bf98fSThomas Graf 	return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3845339bf98fSThomas Graf 	       + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3846339bf98fSThomas Graf 	       + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3847339bf98fSThomas Graf 	       + nla_total_size(4) /* IFLA_MTU */
3848339bf98fSThomas Graf 	       + nla_total_size(4) /* IFLA_LINK */
3849339bf98fSThomas Graf 	       + nla_total_size( /* IFLA_PROTINFO */
3850339bf98fSThomas Graf 			nla_total_size(4) /* IFLA_INET6_FLAGS */
3851339bf98fSThomas Graf 			+ nla_total_size(sizeof(struct ifla_cacheinfo))
3852339bf98fSThomas Graf 			+ nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
3853bf99f1bdSYOSHIFUJI Hideaki 			+ nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
3854bf99f1bdSYOSHIFUJI Hideaki 			+ nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
3855339bf98fSThomas Graf 		 );
3856339bf98fSThomas Graf }
3857c5396a31SYOSHIFUJI Hideaki 
38587d720c3eSTejun Heo static inline void __snmp6_fill_stats(u64 *stats, void __percpu **mib,
38597d720c3eSTejun Heo 				      int items, int bytes)
38607f7d9a6bSHerbert Xu {
38617f7d9a6bSHerbert Xu 	int i;
38627f7d9a6bSHerbert Xu 	int pad = bytes - sizeof(u64) * items;
38637f7d9a6bSHerbert Xu 	BUG_ON(pad < 0);
38647f7d9a6bSHerbert Xu 
38657f7d9a6bSHerbert Xu 	/* Use put_unaligned() because stats may not be aligned for u64. */
38667f7d9a6bSHerbert Xu 	put_unaligned(items, &stats[0]);
38677f7d9a6bSHerbert Xu 	for (i = 1; i < items; i++)
38687f7d9a6bSHerbert Xu 		put_unaligned(snmp_fold_field(mib, i), &stats[i]);
38697f7d9a6bSHerbert Xu 
38707f7d9a6bSHerbert Xu 	memset(&stats[items], 0, pad);
38717f7d9a6bSHerbert Xu }
38727f7d9a6bSHerbert Xu 
38734ce3c183SEric Dumazet static inline void __snmp6_fill_stats64(u64 *stats, void __percpu **mib,
38744ce3c183SEric Dumazet 				      int items, int bytes, size_t syncpoff)
38754ce3c183SEric Dumazet {
38764ce3c183SEric Dumazet 	int i;
38774ce3c183SEric Dumazet 	int pad = bytes - sizeof(u64) * items;
38784ce3c183SEric Dumazet 	BUG_ON(pad < 0);
38794ce3c183SEric Dumazet 
38804ce3c183SEric Dumazet 	/* Use put_unaligned() because stats may not be aligned for u64. */
38814ce3c183SEric Dumazet 	put_unaligned(items, &stats[0]);
38824ce3c183SEric Dumazet 	for (i = 1; i < items; i++)
38834ce3c183SEric Dumazet 		put_unaligned(snmp_fold_field64(mib, i, syncpoff), &stats[i]);
38844ce3c183SEric Dumazet 
38854ce3c183SEric Dumazet 	memset(&stats[items], 0, pad);
38864ce3c183SEric Dumazet }
38874ce3c183SEric Dumazet 
38887f7d9a6bSHerbert Xu static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
38897f7d9a6bSHerbert Xu 			     int bytes)
38907f7d9a6bSHerbert Xu {
38917f7d9a6bSHerbert Xu 	switch (attrtype) {
38927f7d9a6bSHerbert Xu 	case IFLA_INET6_STATS:
38934ce3c183SEric Dumazet 		__snmp6_fill_stats64(stats, (void __percpu **)idev->stats.ipv6,
38944ce3c183SEric Dumazet 				     IPSTATS_MIB_MAX, bytes, offsetof(struct ipstats_mib, syncp));
38957f7d9a6bSHerbert Xu 		break;
38967f7d9a6bSHerbert Xu 	case IFLA_INET6_ICMP6STATS:
38977d720c3eSTejun Heo 		__snmp6_fill_stats(stats, (void __percpu **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes);
38987f7d9a6bSHerbert Xu 		break;
38997f7d9a6bSHerbert Xu 	}
39007f7d9a6bSHerbert Xu }
39017f7d9a6bSHerbert Xu 
39021da177e4SLinus Torvalds static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
3903b6544c0bSJamal Hadi Salim 			     u32 pid, u32 seq, int event, unsigned int flags)
39041da177e4SLinus Torvalds {
39051da177e4SLinus Torvalds 	struct net_device *dev = idev->dev;
3906bf99f1bdSYOSHIFUJI Hideaki 	struct nlattr *nla;
390704561c1fSThomas Graf 	struct ifinfomsg *hdr;
39081da177e4SLinus Torvalds 	struct nlmsghdr *nlh;
390904561c1fSThomas Graf 	void *protoinfo;
39101da177e4SLinus Torvalds 	struct ifla_cacheinfo ci;
39111da177e4SLinus Torvalds 
391204561c1fSThomas Graf 	nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
391304561c1fSThomas Graf 	if (nlh == NULL)
391426932566SPatrick McHardy 		return -EMSGSIZE;
39151da177e4SLinus Torvalds 
391604561c1fSThomas Graf 	hdr = nlmsg_data(nlh);
391704561c1fSThomas Graf 	hdr->ifi_family = AF_INET6;
391804561c1fSThomas Graf 	hdr->__ifi_pad = 0;
391904561c1fSThomas Graf 	hdr->ifi_type = dev->type;
392004561c1fSThomas Graf 	hdr->ifi_index = dev->ifindex;
392104561c1fSThomas Graf 	hdr->ifi_flags = dev_get_flags(dev);
392204561c1fSThomas Graf 	hdr->ifi_change = 0;
392304561c1fSThomas Graf 
392404561c1fSThomas Graf 	NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
39251da177e4SLinus Torvalds 
39261da177e4SLinus Torvalds 	if (dev->addr_len)
392704561c1fSThomas Graf 		NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
39281da177e4SLinus Torvalds 
392904561c1fSThomas Graf 	NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
39301da177e4SLinus Torvalds 	if (dev->ifindex != dev->iflink)
393104561c1fSThomas Graf 		NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
39321da177e4SLinus Torvalds 
393304561c1fSThomas Graf 	protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
393404561c1fSThomas Graf 	if (protoinfo == NULL)
393504561c1fSThomas Graf 		goto nla_put_failure;
39361da177e4SLinus Torvalds 
393704561c1fSThomas Graf 	NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags);
39381da177e4SLinus Torvalds 
39391da177e4SLinus Torvalds 	ci.max_reasm_len = IPV6_MAXPLEN;
39401da177e4SLinus Torvalds 	ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
39411da177e4SLinus Torvalds 		    + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
39421da177e4SLinus Torvalds 	ci.reachable_time = idev->nd_parms->reachable_time;
39431da177e4SLinus Torvalds 	ci.retrans_time = idev->nd_parms->retrans_time;
394404561c1fSThomas Graf 	NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
39451da177e4SLinus Torvalds 
3946bf99f1bdSYOSHIFUJI Hideaki 	nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
3947bf99f1bdSYOSHIFUJI Hideaki 	if (nla == NULL)
394804561c1fSThomas Graf 		goto nla_put_failure;
3949bf99f1bdSYOSHIFUJI Hideaki 	ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
39501da177e4SLinus Torvalds 
3951bf99f1bdSYOSHIFUJI Hideaki 	/* XXX - MC not implemented */
3952bf99f1bdSYOSHIFUJI Hideaki 
3953bf99f1bdSYOSHIFUJI Hideaki 	nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
3954bf99f1bdSYOSHIFUJI Hideaki 	if (nla == NULL)
3955bf99f1bdSYOSHIFUJI Hideaki 		goto nla_put_failure;
3956bf99f1bdSYOSHIFUJI Hideaki 	snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
3957bf99f1bdSYOSHIFUJI Hideaki 
3958bf99f1bdSYOSHIFUJI Hideaki 	nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
3959bf99f1bdSYOSHIFUJI Hideaki 	if (nla == NULL)
3960bf99f1bdSYOSHIFUJI Hideaki 		goto nla_put_failure;
3961bf99f1bdSYOSHIFUJI Hideaki 	snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
39621da177e4SLinus Torvalds 
396304561c1fSThomas Graf 	nla_nest_end(skb, protoinfo);
396404561c1fSThomas Graf 	return nlmsg_end(skb, nlh);
39651da177e4SLinus Torvalds 
396604561c1fSThomas Graf nla_put_failure:
396726932566SPatrick McHardy 	nlmsg_cancel(skb, nlh);
396826932566SPatrick McHardy 	return -EMSGSIZE;
39691da177e4SLinus Torvalds }
39701da177e4SLinus Torvalds 
39711da177e4SLinus Torvalds static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
39721da177e4SLinus Torvalds {
39733b1e0a65SYOSHIFUJI Hideaki 	struct net *net = sock_net(skb->sk);
397484d2697dSEric Dumazet 	int h, s_h;
3975434a8a58SDavid S. Miller 	int idx = 0, s_idx;
39761da177e4SLinus Torvalds 	struct net_device *dev;
39771da177e4SLinus Torvalds 	struct inet6_dev *idev;
397884d2697dSEric Dumazet 	struct hlist_head *head;
397984d2697dSEric Dumazet 	struct hlist_node *node;
39801da177e4SLinus Torvalds 
398184d2697dSEric Dumazet 	s_h = cb->args[0];
398284d2697dSEric Dumazet 	s_idx = cb->args[1];
398384d2697dSEric Dumazet 
398484d2697dSEric Dumazet 	rcu_read_lock();
398584d2697dSEric Dumazet 	for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
39867562f876SPavel Emelianov 		idx = 0;
398784d2697dSEric Dumazet 		head = &net->dev_index_head[h];
398884d2697dSEric Dumazet 		hlist_for_each_entry_rcu(dev, node, head, index_hlist) {
39891da177e4SLinus Torvalds 			if (idx < s_idx)
39907562f876SPavel Emelianov 				goto cont;
399184d2697dSEric Dumazet 			idev = __in6_dev_get(dev);
399284d2697dSEric Dumazet 			if (!idev)
39937562f876SPavel Emelianov 				goto cont;
399484d2697dSEric Dumazet 			if (inet6_fill_ifinfo(skb, idev,
399584d2697dSEric Dumazet 					      NETLINK_CB(cb->skb).pid,
399684d2697dSEric Dumazet 					      cb->nlh->nlmsg_seq,
399784d2697dSEric Dumazet 					      RTM_NEWLINK, NLM_F_MULTI) <= 0)
399884d2697dSEric Dumazet 				goto out;
39997562f876SPavel Emelianov cont:
40007562f876SPavel Emelianov 			idx++;
40011da177e4SLinus Torvalds 		}
400284d2697dSEric Dumazet 	}
400384d2697dSEric Dumazet out:
400484d2697dSEric Dumazet 	rcu_read_unlock();
400584d2697dSEric Dumazet 	cb->args[1] = idx;
400684d2697dSEric Dumazet 	cb->args[0] = h;
40071da177e4SLinus Torvalds 
40081da177e4SLinus Torvalds 	return skb->len;
40091da177e4SLinus Torvalds }
40101da177e4SLinus Torvalds 
40111da177e4SLinus Torvalds void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
40121da177e4SLinus Torvalds {
40131da177e4SLinus Torvalds 	struct sk_buff *skb;
4014c346dca1SYOSHIFUJI Hideaki 	struct net *net = dev_net(idev->dev);
40158d7a76c9SThomas Graf 	int err = -ENOBUFS;
40161da177e4SLinus Torvalds 
4017339bf98fSThomas Graf 	skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
40188d7a76c9SThomas Graf 	if (skb == NULL)
40198d7a76c9SThomas Graf 		goto errout;
40208d7a76c9SThomas Graf 
40218d7a76c9SThomas Graf 	err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
402226932566SPatrick McHardy 	if (err < 0) {
402326932566SPatrick McHardy 		/* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
402426932566SPatrick McHardy 		WARN_ON(err == -EMSGSIZE);
402526932566SPatrick McHardy 		kfree_skb(skb);
402626932566SPatrick McHardy 		goto errout;
402726932566SPatrick McHardy 	}
40281ce85fe4SPablo Neira Ayuso 	rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
40291ce85fe4SPablo Neira Ayuso 	return;
40308d7a76c9SThomas Graf errout:
40318d7a76c9SThomas Graf 	if (err < 0)
40326fda7350SBenjamin Thery 		rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
40331da177e4SLinus Torvalds }
40341da177e4SLinus Torvalds 
4035339bf98fSThomas Graf static inline size_t inet6_prefix_nlmsg_size(void)
4036339bf98fSThomas Graf {
4037339bf98fSThomas Graf 	return NLMSG_ALIGN(sizeof(struct prefixmsg))
4038339bf98fSThomas Graf 	       + nla_total_size(sizeof(struct in6_addr))
4039339bf98fSThomas Graf 	       + nla_total_size(sizeof(struct prefix_cacheinfo));
4040339bf98fSThomas Graf }
4041c5396a31SYOSHIFUJI Hideaki 
40421da177e4SLinus Torvalds static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
4043b6544c0bSJamal Hadi Salim 			     struct prefix_info *pinfo, u32 pid, u32 seq,
4044b6544c0bSJamal Hadi Salim 			     int event, unsigned int flags)
40451da177e4SLinus Torvalds {
40461da177e4SLinus Torvalds 	struct prefixmsg *pmsg;
40471da177e4SLinus Torvalds 	struct nlmsghdr *nlh;
40481da177e4SLinus Torvalds 	struct prefix_cacheinfo	ci;
40491da177e4SLinus Torvalds 
40506051e2f4SThomas Graf 	nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags);
40516051e2f4SThomas Graf 	if (nlh == NULL)
405226932566SPatrick McHardy 		return -EMSGSIZE;
40536051e2f4SThomas Graf 
40546051e2f4SThomas Graf 	pmsg = nlmsg_data(nlh);
40551da177e4SLinus Torvalds 	pmsg->prefix_family = AF_INET6;
40568a47077aSPatrick McHardy 	pmsg->prefix_pad1 = 0;
40578a47077aSPatrick McHardy 	pmsg->prefix_pad2 = 0;
40581da177e4SLinus Torvalds 	pmsg->prefix_ifindex = idev->dev->ifindex;
40591da177e4SLinus Torvalds 	pmsg->prefix_len = pinfo->prefix_len;
40601da177e4SLinus Torvalds 	pmsg->prefix_type = pinfo->type;
40618a47077aSPatrick McHardy 	pmsg->prefix_pad3 = 0;
40621da177e4SLinus Torvalds 	pmsg->prefix_flags = 0;
40631da177e4SLinus Torvalds 	if (pinfo->onlink)
40641da177e4SLinus Torvalds 		pmsg->prefix_flags |= IF_PREFIX_ONLINK;
40651da177e4SLinus Torvalds 	if (pinfo->autoconf)
40661da177e4SLinus Torvalds 		pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
40671da177e4SLinus Torvalds 
40686051e2f4SThomas Graf 	NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
40691da177e4SLinus Torvalds 
40701da177e4SLinus Torvalds 	ci.preferred_time = ntohl(pinfo->prefered);
40711da177e4SLinus Torvalds 	ci.valid_time = ntohl(pinfo->valid);
40726051e2f4SThomas Graf 	NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
40731da177e4SLinus Torvalds 
40746051e2f4SThomas Graf 	return nlmsg_end(skb, nlh);
40751da177e4SLinus Torvalds 
40766051e2f4SThomas Graf nla_put_failure:
407726932566SPatrick McHardy 	nlmsg_cancel(skb, nlh);
407826932566SPatrick McHardy 	return -EMSGSIZE;
40791da177e4SLinus Torvalds }
40801da177e4SLinus Torvalds 
40811da177e4SLinus Torvalds static void inet6_prefix_notify(int event, struct inet6_dev *idev,
40821da177e4SLinus Torvalds 			 struct prefix_info *pinfo)
40831da177e4SLinus Torvalds {
40841da177e4SLinus Torvalds 	struct sk_buff *skb;
4085c346dca1SYOSHIFUJI Hideaki 	struct net *net = dev_net(idev->dev);
40868c384bfaSThomas Graf 	int err = -ENOBUFS;
40871da177e4SLinus Torvalds 
4088339bf98fSThomas Graf 	skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
40898c384bfaSThomas Graf 	if (skb == NULL)
40908c384bfaSThomas Graf 		goto errout;
40918c384bfaSThomas Graf 
40928c384bfaSThomas Graf 	err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
409326932566SPatrick McHardy 	if (err < 0) {
409426932566SPatrick McHardy 		/* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
409526932566SPatrick McHardy 		WARN_ON(err == -EMSGSIZE);
409626932566SPatrick McHardy 		kfree_skb(skb);
409726932566SPatrick McHardy 		goto errout;
409826932566SPatrick McHardy 	}
40991ce85fe4SPablo Neira Ayuso 	rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
41001ce85fe4SPablo Neira Ayuso 	return;
41018c384bfaSThomas Graf errout:
41028c384bfaSThomas Graf 	if (err < 0)
41036fda7350SBenjamin Thery 		rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err);
41041da177e4SLinus Torvalds }
41051da177e4SLinus Torvalds 
41061da177e4SLinus Torvalds static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
41071da177e4SLinus Torvalds {
41081da177e4SLinus Torvalds 	inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
41091da177e4SLinus Torvalds 
41101da177e4SLinus Torvalds 	switch (event) {
41111da177e4SLinus Torvalds 	case RTM_NEWADDR:
411295c385b4SNeil Horman 		/*
411395c385b4SNeil Horman 		 * If the address was optimistic
411495c385b4SNeil Horman 		 * we inserted the route at the start of
411595c385b4SNeil Horman 		 * our DAD process, so we don't need
411695c385b4SNeil Horman 		 * to do it again
411795c385b4SNeil Horman 		 */
411895c385b4SNeil Horman 		if (!(ifp->rt->rt6i_node))
411940e22e8fSThomas Graf 			ip6_ins_rt(ifp->rt);
41201da177e4SLinus Torvalds 		if (ifp->idev->cnf.forwarding)
41211da177e4SLinus Torvalds 			addrconf_join_anycast(ifp);
41221da177e4SLinus Torvalds 		break;
41231da177e4SLinus Torvalds 	case RTM_DELADDR:
41241da177e4SLinus Torvalds 		if (ifp->idev->cnf.forwarding)
41251da177e4SLinus Torvalds 			addrconf_leave_anycast(ifp);
41261da177e4SLinus Torvalds 		addrconf_leave_solict(ifp->idev, &ifp->addr);
4127d8d1f30bSChangli Gao 		dst_hold(&ifp->rt->dst);
412893fa159aSstephen hemminger 
4129e9d3e084SHerbert Xu 		if (ifp->state == INET6_IFADDR_STATE_DEAD &&
4130e9d3e084SHerbert Xu 		    ip6_del_rt(ifp->rt))
4131d8d1f30bSChangli Gao 			dst_free(&ifp->rt->dst);
41321da177e4SLinus Torvalds 		break;
41331da177e4SLinus Torvalds 	}
41341da177e4SLinus Torvalds }
41351da177e4SLinus Torvalds 
41361da177e4SLinus Torvalds static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
41371da177e4SLinus Torvalds {
41388814c4b5SYOSHIFUJI Hideaki 	rcu_read_lock_bh();
41391da177e4SLinus Torvalds 	if (likely(ifp->idev->dead == 0))
41401da177e4SLinus Torvalds 		__ipv6_ifa_notify(event, ifp);
41418814c4b5SYOSHIFUJI Hideaki 	rcu_read_unlock_bh();
41421da177e4SLinus Torvalds }
41431da177e4SLinus Torvalds 
41441da177e4SLinus Torvalds #ifdef CONFIG_SYSCTL
41451da177e4SLinus Torvalds 
41461da177e4SLinus Torvalds static
41478d65af78SAlexey Dobriyan int addrconf_sysctl_forward(ctl_table *ctl, int write,
41481da177e4SLinus Torvalds 			   void __user *buffer, size_t *lenp, loff_t *ppos)
41491da177e4SLinus Torvalds {
41501da177e4SLinus Torvalds 	int *valp = ctl->data;
41511da177e4SLinus Torvalds 	int val = *valp;
415288af182eSEric W. Biederman 	loff_t pos = *ppos;
41531da177e4SLinus Torvalds 	int ret;
41541da177e4SLinus Torvalds 
41558d65af78SAlexey Dobriyan 	ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
41561da177e4SLinus Torvalds 
4157c8fecf22SPavel Emelyanov 	if (write)
4158b325fddbSStephen Hemminger 		ret = addrconf_fixup_forwarding(ctl, valp, val);
415988af182eSEric W. Biederman 	if (ret)
416088af182eSEric W. Biederman 		*ppos = pos;
41611da177e4SLinus Torvalds 	return ret;
41621da177e4SLinus Torvalds }
41631da177e4SLinus Torvalds 
416456d417b1SBrian Haley static void dev_disable_change(struct inet6_dev *idev)
416556d417b1SBrian Haley {
416656d417b1SBrian Haley 	if (!idev || !idev->dev)
416756d417b1SBrian Haley 		return;
416856d417b1SBrian Haley 
416956d417b1SBrian Haley 	if (idev->cnf.disable_ipv6)
417056d417b1SBrian Haley 		addrconf_notify(NULL, NETDEV_DOWN, idev->dev);
417156d417b1SBrian Haley 	else
417256d417b1SBrian Haley 		addrconf_notify(NULL, NETDEV_UP, idev->dev);
417356d417b1SBrian Haley }
417456d417b1SBrian Haley 
417556d417b1SBrian Haley static void addrconf_disable_change(struct net *net, __s32 newf)
417656d417b1SBrian Haley {
417756d417b1SBrian Haley 	struct net_device *dev;
417856d417b1SBrian Haley 	struct inet6_dev *idev;
417956d417b1SBrian Haley 
418056d417b1SBrian Haley 	rcu_read_lock();
4181c6d14c84SEric Dumazet 	for_each_netdev_rcu(net, dev) {
418256d417b1SBrian Haley 		idev = __in6_dev_get(dev);
418356d417b1SBrian Haley 		if (idev) {
418456d417b1SBrian Haley 			int changed = (!idev->cnf.disable_ipv6) ^ (!newf);
418556d417b1SBrian Haley 			idev->cnf.disable_ipv6 = newf;
418656d417b1SBrian Haley 			if (changed)
418756d417b1SBrian Haley 				dev_disable_change(idev);
418856d417b1SBrian Haley 		}
418956d417b1SBrian Haley 	}
4190c6d14c84SEric Dumazet 	rcu_read_unlock();
419156d417b1SBrian Haley }
419256d417b1SBrian Haley 
419356d417b1SBrian Haley static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int old)
419456d417b1SBrian Haley {
419556d417b1SBrian Haley 	struct net *net;
419656d417b1SBrian Haley 
419756d417b1SBrian Haley 	net = (struct net *)table->extra2;
419856d417b1SBrian Haley 
419956d417b1SBrian Haley 	if (p == &net->ipv6.devconf_dflt->disable_ipv6)
420056d417b1SBrian Haley 		return 0;
420156d417b1SBrian Haley 
420288af182eSEric W. Biederman 	if (!rtnl_trylock()) {
420388af182eSEric W. Biederman 		/* Restore the original values before restarting */
420488af182eSEric W. Biederman 		*p = old;
420556d417b1SBrian Haley 		return restart_syscall();
420688af182eSEric W. Biederman 	}
420756d417b1SBrian Haley 
420856d417b1SBrian Haley 	if (p == &net->ipv6.devconf_all->disable_ipv6) {
420956d417b1SBrian Haley 		__s32 newf = net->ipv6.devconf_all->disable_ipv6;
421056d417b1SBrian Haley 		net->ipv6.devconf_dflt->disable_ipv6 = newf;
421156d417b1SBrian Haley 		addrconf_disable_change(net, newf);
421256d417b1SBrian Haley 	} else if ((!*p) ^ (!old))
421356d417b1SBrian Haley 		dev_disable_change((struct inet6_dev *)table->extra1);
421456d417b1SBrian Haley 
421556d417b1SBrian Haley 	rtnl_unlock();
421656d417b1SBrian Haley 	return 0;
421756d417b1SBrian Haley }
421856d417b1SBrian Haley 
421956d417b1SBrian Haley static
42208d65af78SAlexey Dobriyan int addrconf_sysctl_disable(ctl_table *ctl, int write,
422156d417b1SBrian Haley 			    void __user *buffer, size_t *lenp, loff_t *ppos)
422256d417b1SBrian Haley {
422356d417b1SBrian Haley 	int *valp = ctl->data;
422456d417b1SBrian Haley 	int val = *valp;
422588af182eSEric W. Biederman 	loff_t pos = *ppos;
422656d417b1SBrian Haley 	int ret;
422756d417b1SBrian Haley 
42288d65af78SAlexey Dobriyan 	ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
422956d417b1SBrian Haley 
423056d417b1SBrian Haley 	if (write)
423156d417b1SBrian Haley 		ret = addrconf_disable_ipv6(ctl, valp, val);
423288af182eSEric W. Biederman 	if (ret)
423388af182eSEric W. Biederman 		*ppos = pos;
423456d417b1SBrian Haley 	return ret;
423556d417b1SBrian Haley }
423656d417b1SBrian Haley 
42371da177e4SLinus Torvalds static struct addrconf_sysctl_table
42381da177e4SLinus Torvalds {
42391da177e4SLinus Torvalds 	struct ctl_table_header *sysctl_header;
4240f6a07b29SYOSHIFUJI Hideaki 	ctl_table addrconf_vars[DEVCONF_MAX+1];
42411dab6222SPavel Emelyanov 	char *dev_name;
4242ab32ea5dSBrian Haley } addrconf_sysctl __read_mostly = {
42431da177e4SLinus Torvalds 	.sysctl_header = NULL,
42441da177e4SLinus Torvalds 	.addrconf_vars = {
42451da177e4SLinus Torvalds 		{
42461da177e4SLinus Torvalds 			.procname	= "forwarding",
42471da177e4SLinus Torvalds 			.data		= &ipv6_devconf.forwarding,
42481da177e4SLinus Torvalds 			.maxlen		= sizeof(int),
42491da177e4SLinus Torvalds 			.mode		= 0644,
42506d9f239aSAlexey Dobriyan 			.proc_handler	= addrconf_sysctl_forward,
42511da177e4SLinus Torvalds 		},
42521da177e4SLinus Torvalds 		{
42531da177e4SLinus Torvalds 			.procname	= "hop_limit",
42541da177e4SLinus Torvalds 			.data		= &ipv6_devconf.hop_limit,
42551da177e4SLinus Torvalds 			.maxlen		= sizeof(int),
42561da177e4SLinus Torvalds 			.mode		= 0644,
42571da177e4SLinus Torvalds 			.proc_handler	= proc_dointvec,
42581da177e4SLinus Torvalds 		},
42591da177e4SLinus Torvalds 		{
42601da177e4SLinus Torvalds 			.procname	= "mtu",
42611da177e4SLinus Torvalds 			.data		= &ipv6_devconf.mtu6,
42621da177e4SLinus Torvalds 			.maxlen		= sizeof(int),
42631da177e4SLinus Torvalds 			.mode		= 0644,
42646d9f239aSAlexey Dobriyan 			.proc_handler	= proc_dointvec,
42651da177e4SLinus Torvalds 		},
42661da177e4SLinus Torvalds 		{
42671da177e4SLinus Torvalds 			.procname	= "accept_ra",
42681da177e4SLinus Torvalds 			.data		= &ipv6_devconf.accept_ra,
42691da177e4SLinus Torvalds 			.maxlen		= sizeof(int),
42701da177e4SLinus Torvalds 			.mode		= 0644,
42716d9f239aSAlexey Dobriyan 			.proc_handler	= proc_dointvec,
42721da177e4SLinus Torvalds 		},
42731da177e4SLinus Torvalds 		{
42741da177e4SLinus Torvalds 			.procname	= "accept_redirects",
42751da177e4SLinus Torvalds 			.data		= &ipv6_devconf.accept_redirects,
42761da177e4SLinus Torvalds 			.maxlen		= sizeof(int),
42771da177e4SLinus Torvalds 			.mode		= 0644,
42786d9f239aSAlexey Dobriyan 			.proc_handler	= proc_dointvec,
42791da177e4SLinus Torvalds 		},
42801da177e4SLinus Torvalds 		{
42811da177e4SLinus Torvalds 			.procname	= "autoconf",
42821da177e4SLinus Torvalds 			.data		= &ipv6_devconf.autoconf,
42831da177e4SLinus Torvalds 			.maxlen		= sizeof(int),
42841da177e4SLinus Torvalds 			.mode		= 0644,
42856d9f239aSAlexey Dobriyan 			.proc_handler	= proc_dointvec,
42861da177e4SLinus Torvalds 		},
42871da177e4SLinus Torvalds 		{
42881da177e4SLinus Torvalds 			.procname	= "dad_transmits",
42891da177e4SLinus Torvalds 			.data		= &ipv6_devconf.dad_transmits,
42901da177e4SLinus Torvalds 			.maxlen		= sizeof(int),
42911da177e4SLinus Torvalds 			.mode		= 0644,
42926d9f239aSAlexey Dobriyan 			.proc_handler	= proc_dointvec,
42931da177e4SLinus Torvalds 		},
42941da177e4SLinus Torvalds 		{
42951da177e4SLinus Torvalds 			.procname	= "router_solicitations",
42961da177e4SLinus Torvalds 			.data		= &ipv6_devconf.rtr_solicits,
42971da177e4SLinus Torvalds 			.maxlen		= sizeof(int),
42981da177e4SLinus Torvalds 			.mode		= 0644,
42996d9f239aSAlexey Dobriyan 			.proc_handler	= proc_dointvec,
43001da177e4SLinus Torvalds 		},
43011da177e4SLinus Torvalds 		{
43021da177e4SLinus Torvalds 			.procname	= "router_solicitation_interval",
43031da177e4SLinus Torvalds 			.data		= &ipv6_devconf.rtr_solicit_interval,
43041da177e4SLinus Torvalds 			.maxlen		= sizeof(int),
43051da177e4SLinus Torvalds 			.mode		= 0644,
43066d9f239aSAlexey Dobriyan 			.proc_handler	= proc_dointvec_jiffies,
43071da177e4SLinus Torvalds 		},
43081da177e4SLinus Torvalds 		{
43091da177e4SLinus Torvalds 			.procname	= "router_solicitation_delay",
43101da177e4SLinus Torvalds 			.data		= &ipv6_devconf.rtr_solicit_delay,
43111da177e4SLinus Torvalds 			.maxlen		= sizeof(int),
43121da177e4SLinus Torvalds 			.mode		= 0644,
43136d9f239aSAlexey Dobriyan 			.proc_handler	= proc_dointvec_jiffies,
43141da177e4SLinus Torvalds 		},
43151da177e4SLinus Torvalds 		{
43161da177e4SLinus Torvalds 			.procname	= "force_mld_version",
43171da177e4SLinus Torvalds 			.data		= &ipv6_devconf.force_mld_version,
43181da177e4SLinus Torvalds 			.maxlen		= sizeof(int),
43191da177e4SLinus Torvalds 			.mode		= 0644,
43206d9f239aSAlexey Dobriyan 			.proc_handler	= proc_dointvec,
43211da177e4SLinus Torvalds 		},
43221da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY
43231da177e4SLinus Torvalds 		{
43241da177e4SLinus Torvalds 			.procname	= "use_tempaddr",
43251da177e4SLinus Torvalds 			.data		= &ipv6_devconf.use_tempaddr,
43261da177e4SLinus Torvalds 			.maxlen		= sizeof(int),
43271da177e4SLinus Torvalds 			.mode		= 0644,
43286d9f239aSAlexey Dobriyan 			.proc_handler	= proc_dointvec,
43291da177e4SLinus Torvalds 		},
43301da177e4SLinus Torvalds 		{
43311da177e4SLinus Torvalds 			.procname	= "temp_valid_lft",
43321da177e4SLinus Torvalds 			.data		= &ipv6_devconf.temp_valid_lft,
43331da177e4SLinus Torvalds 			.maxlen		= sizeof(int),
43341da177e4SLinus Torvalds 			.mode		= 0644,
43356d9f239aSAlexey Dobriyan 			.proc_handler	= proc_dointvec,
43361da177e4SLinus Torvalds 		},
43371da177e4SLinus Torvalds 		{
43381da177e4SLinus Torvalds 			.procname	= "temp_prefered_lft",
43391da177e4SLinus Torvalds 			.data		= &ipv6_devconf.temp_prefered_lft,
43401da177e4SLinus Torvalds 			.maxlen		= sizeof(int),
43411da177e4SLinus Torvalds 			.mode		= 0644,
43426d9f239aSAlexey Dobriyan 			.proc_handler	= proc_dointvec,
43431da177e4SLinus Torvalds 		},
43441da177e4SLinus Torvalds 		{
43451da177e4SLinus Torvalds 			.procname	= "regen_max_retry",
43461da177e4SLinus Torvalds 			.data		= &ipv6_devconf.regen_max_retry,
43471da177e4SLinus Torvalds 			.maxlen		= sizeof(int),
43481da177e4SLinus Torvalds 			.mode		= 0644,
43496d9f239aSAlexey Dobriyan 			.proc_handler	= proc_dointvec,
43501da177e4SLinus Torvalds 		},
43511da177e4SLinus Torvalds 		{
43521da177e4SLinus Torvalds 			.procname	= "max_desync_factor",
43531da177e4SLinus Torvalds 			.data		= &ipv6_devconf.max_desync_factor,
43541da177e4SLinus Torvalds 			.maxlen		= sizeof(int),
43551da177e4SLinus Torvalds 			.mode		= 0644,
43566d9f239aSAlexey Dobriyan 			.proc_handler	= proc_dointvec,
43571da177e4SLinus Torvalds 		},
43581da177e4SLinus Torvalds #endif
43591da177e4SLinus Torvalds 		{
43601da177e4SLinus Torvalds 			.procname	= "max_addresses",
43611da177e4SLinus Torvalds 			.data		= &ipv6_devconf.max_addresses,
43621da177e4SLinus Torvalds 			.maxlen		= sizeof(int),
43631da177e4SLinus Torvalds 			.mode		= 0644,
43646d9f239aSAlexey Dobriyan 			.proc_handler	= proc_dointvec,
43651da177e4SLinus Torvalds 		},
43661da177e4SLinus Torvalds 		{
436765f5c7c1SYOSHIFUJI Hideaki 			.procname	= "accept_ra_defrtr",
436865f5c7c1SYOSHIFUJI Hideaki 			.data		= &ipv6_devconf.accept_ra_defrtr,
436965f5c7c1SYOSHIFUJI Hideaki 			.maxlen		= sizeof(int),
437065f5c7c1SYOSHIFUJI Hideaki 			.mode		= 0644,
43716d9f239aSAlexey Dobriyan 			.proc_handler	= proc_dointvec,
437265f5c7c1SYOSHIFUJI Hideaki 		},
437365f5c7c1SYOSHIFUJI Hideaki 		{
4374c4fd30ebSYOSHIFUJI Hideaki 			.procname	= "accept_ra_pinfo",
4375c4fd30ebSYOSHIFUJI Hideaki 			.data		= &ipv6_devconf.accept_ra_pinfo,
4376c4fd30ebSYOSHIFUJI Hideaki 			.maxlen		= sizeof(int),
4377c4fd30ebSYOSHIFUJI Hideaki 			.mode		= 0644,
43786d9f239aSAlexey Dobriyan 			.proc_handler	= proc_dointvec,
4379c4fd30ebSYOSHIFUJI Hideaki 		},
4380930d6ff2SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_ROUTER_PREF
4381930d6ff2SYOSHIFUJI Hideaki 		{
4382930d6ff2SYOSHIFUJI Hideaki 			.procname	= "accept_ra_rtr_pref",
4383930d6ff2SYOSHIFUJI Hideaki 			.data		= &ipv6_devconf.accept_ra_rtr_pref,
4384930d6ff2SYOSHIFUJI Hideaki 			.maxlen		= sizeof(int),
4385930d6ff2SYOSHIFUJI Hideaki 			.mode		= 0644,
43866d9f239aSAlexey Dobriyan 			.proc_handler	= proc_dointvec,
4387930d6ff2SYOSHIFUJI Hideaki 		},
438852e16356SYOSHIFUJI Hideaki 		{
438952e16356SYOSHIFUJI Hideaki 			.procname	= "router_probe_interval",
439052e16356SYOSHIFUJI Hideaki 			.data		= &ipv6_devconf.rtr_probe_interval,
439152e16356SYOSHIFUJI Hideaki 			.maxlen		= sizeof(int),
439252e16356SYOSHIFUJI Hideaki 			.mode		= 0644,
43936d9f239aSAlexey Dobriyan 			.proc_handler	= proc_dointvec_jiffies,
439452e16356SYOSHIFUJI Hideaki 		},
4395fa03ef38SNeil Horman #ifdef CONFIG_IPV6_ROUTE_INFO
439609c884d4SYOSHIFUJI Hideaki 		{
439709c884d4SYOSHIFUJI Hideaki 			.procname	= "accept_ra_rt_info_max_plen",
439809c884d4SYOSHIFUJI Hideaki 			.data		= &ipv6_devconf.accept_ra_rt_info_max_plen,
439909c884d4SYOSHIFUJI Hideaki 			.maxlen		= sizeof(int),
440009c884d4SYOSHIFUJI Hideaki 			.mode		= 0644,
44016d9f239aSAlexey Dobriyan 			.proc_handler	= proc_dointvec,
440209c884d4SYOSHIFUJI Hideaki 		},
440309c884d4SYOSHIFUJI Hideaki #endif
4404930d6ff2SYOSHIFUJI Hideaki #endif
4405c4fd30ebSYOSHIFUJI Hideaki 		{
4406fbea49e1SYOSHIFUJI Hideaki 			.procname	= "proxy_ndp",
4407fbea49e1SYOSHIFUJI Hideaki 			.data		= &ipv6_devconf.proxy_ndp,
4408fbea49e1SYOSHIFUJI Hideaki 			.maxlen		= sizeof(int),
4409fbea49e1SYOSHIFUJI Hideaki 			.mode		= 0644,
44106d9f239aSAlexey Dobriyan 			.proc_handler	= proc_dointvec,
4411fbea49e1SYOSHIFUJI Hideaki 		},
4412fbea49e1SYOSHIFUJI Hideaki 		{
44130bcbc926SYOSHIFUJI Hideaki 			.procname	= "accept_source_route",
44140bcbc926SYOSHIFUJI Hideaki 			.data		= &ipv6_devconf.accept_source_route,
44150bcbc926SYOSHIFUJI Hideaki 			.maxlen		= sizeof(int),
44160bcbc926SYOSHIFUJI Hideaki 			.mode		= 0644,
44176d9f239aSAlexey Dobriyan 			.proc_handler	= proc_dointvec,
44180bcbc926SYOSHIFUJI Hideaki 		},
441995c385b4SNeil Horman #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
442095c385b4SNeil Horman 		{
442195c385b4SNeil Horman 			.procname       = "optimistic_dad",
442295c385b4SNeil Horman 			.data           = &ipv6_devconf.optimistic_dad,
442395c385b4SNeil Horman 			.maxlen         = sizeof(int),
442495c385b4SNeil Horman 			.mode           = 0644,
44256d9f239aSAlexey Dobriyan 			.proc_handler   = proc_dointvec,
442695c385b4SNeil Horman 
442795c385b4SNeil Horman 		},
442895c385b4SNeil Horman #endif
44297bc570c8SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_MROUTE
44307bc570c8SYOSHIFUJI Hideaki 		{
44317bc570c8SYOSHIFUJI Hideaki 			.procname	= "mc_forwarding",
44327bc570c8SYOSHIFUJI Hideaki 			.data		= &ipv6_devconf.mc_forwarding,
44337bc570c8SYOSHIFUJI Hideaki 			.maxlen		= sizeof(int),
4434a4e6db07SDavid S. Miller 			.mode		= 0444,
44356d9f239aSAlexey Dobriyan 			.proc_handler	= proc_dointvec,
44367bc570c8SYOSHIFUJI Hideaki 		},
44377bc570c8SYOSHIFUJI Hideaki #endif
44380bcbc926SYOSHIFUJI Hideaki 		{
4439778d80beSYOSHIFUJI Hideaki 			.procname	= "disable_ipv6",
4440778d80beSYOSHIFUJI Hideaki 			.data		= &ipv6_devconf.disable_ipv6,
4441778d80beSYOSHIFUJI Hideaki 			.maxlen		= sizeof(int),
4442778d80beSYOSHIFUJI Hideaki 			.mode		= 0644,
444356d417b1SBrian Haley 			.proc_handler	= addrconf_sysctl_disable,
4444778d80beSYOSHIFUJI Hideaki 		},
4445778d80beSYOSHIFUJI Hideaki 		{
44461b34be74SYOSHIFUJI Hideaki 			.procname	= "accept_dad",
44471b34be74SYOSHIFUJI Hideaki 			.data		= &ipv6_devconf.accept_dad,
44481b34be74SYOSHIFUJI Hideaki 			.maxlen		= sizeof(int),
44491b34be74SYOSHIFUJI Hideaki 			.mode		= 0644,
44506d9f239aSAlexey Dobriyan 			.proc_handler	= proc_dointvec,
44511b34be74SYOSHIFUJI Hideaki 		},
44521b34be74SYOSHIFUJI Hideaki 		{
4453f7734fdfSOctavian Purdila 			.procname       = "force_tllao",
4454f7734fdfSOctavian Purdila 			.data           = &ipv6_devconf.force_tllao,
4455f7734fdfSOctavian Purdila 			.maxlen         = sizeof(int),
4456f7734fdfSOctavian Purdila 			.mode           = 0644,
4457f7734fdfSOctavian Purdila 			.proc_handler   = proc_dointvec
4458f7734fdfSOctavian Purdila 		},
4459f7734fdfSOctavian Purdila 		{
4460f8572d8fSEric W. Biederman 			/* sentinel */
44611da177e4SLinus Torvalds 		}
44621da177e4SLinus Torvalds 	},
44631da177e4SLinus Torvalds };
44641da177e4SLinus Torvalds 
4465bff16c2fSPavel Emelyanov static int __addrconf_sysctl_register(struct net *net, char *dev_name,
4466f8572d8fSEric W. Biederman 		struct inet6_dev *idev, struct ipv6_devconf *p)
44671da177e4SLinus Torvalds {
44681da177e4SLinus Torvalds 	int i;
44691da177e4SLinus Torvalds 	struct addrconf_sysctl_table *t;
44701da177e4SLinus Torvalds 
44711dab6222SPavel Emelyanov #define ADDRCONF_CTL_PATH_DEV	3
44721dab6222SPavel Emelyanov 
44731dab6222SPavel Emelyanov 	struct ctl_path addrconf_ctl_path[] = {
4474f8572d8fSEric W. Biederman 		{ .procname = "net", },
4475f8572d8fSEric W. Biederman 		{ .procname = "ipv6", },
4476f8572d8fSEric W. Biederman 		{ .procname = "conf", },
44771dab6222SPavel Emelyanov 		{ /* to be set */ },
44781dab6222SPavel Emelyanov 		{ },
44791dab6222SPavel Emelyanov 	};
44801dab6222SPavel Emelyanov 
44811dab6222SPavel Emelyanov 
4482af879cc7SArnaldo Carvalho de Melo 	t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
44831da177e4SLinus Torvalds 	if (t == NULL)
4484f68635e6SPavel Emelyanov 		goto out;
4485f68635e6SPavel Emelyanov 
44861da177e4SLinus Torvalds 	for (i = 0; t->addrconf_vars[i].data; i++) {
44871da177e4SLinus Torvalds 		t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf;
44881da177e4SLinus Torvalds 		t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
4489bff16c2fSPavel Emelyanov 		t->addrconf_vars[i].extra2 = net;
44901da177e4SLinus Torvalds 	}
44911da177e4SLinus Torvalds 
44921da177e4SLinus Torvalds 	/*
44931da177e4SLinus Torvalds 	 * Make a copy of dev_name, because '.procname' is regarded as const
44941da177e4SLinus Torvalds 	 * by sysctl and we wouldn't want anyone to change it under our feet
44951da177e4SLinus Torvalds 	 * (see SIOCSIFNAME).
44961da177e4SLinus Torvalds 	 */
44971dab6222SPavel Emelyanov 	t->dev_name = kstrdup(dev_name, GFP_KERNEL);
44981dab6222SPavel Emelyanov 	if (!t->dev_name)
44991da177e4SLinus Torvalds 		goto free;
45001da177e4SLinus Torvalds 
45011dab6222SPavel Emelyanov 	addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name;
45021da177e4SLinus Torvalds 
4503bff16c2fSPavel Emelyanov 	t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path,
45041dab6222SPavel Emelyanov 			t->addrconf_vars);
45051da177e4SLinus Torvalds 	if (t->sysctl_header == NULL)
45061da177e4SLinus Torvalds 		goto free_procname;
4507f68635e6SPavel Emelyanov 
45081da177e4SLinus Torvalds 	p->sysctl = t;
450995897312SPavel Emelyanov 	return 0;
45101da177e4SLinus Torvalds 
45111da177e4SLinus Torvalds free_procname:
45121dab6222SPavel Emelyanov 	kfree(t->dev_name);
45131da177e4SLinus Torvalds free:
45141da177e4SLinus Torvalds 	kfree(t);
4515f68635e6SPavel Emelyanov out:
451695897312SPavel Emelyanov 	return -ENOBUFS;
45171da177e4SLinus Torvalds }
45181da177e4SLinus Torvalds 
4519408c4768SPavel Emelyanov static void __addrconf_sysctl_unregister(struct ipv6_devconf *p)
4520f52295a9SPavel Emelyanov {
4521408c4768SPavel Emelyanov 	struct addrconf_sysctl_table *t;
4522f52295a9SPavel Emelyanov 
4523408c4768SPavel Emelyanov 	if (p->sysctl == NULL)
4524408c4768SPavel Emelyanov 		return;
4525408c4768SPavel Emelyanov 
4526408c4768SPavel Emelyanov 	t = p->sysctl;
45271da177e4SLinus Torvalds 	p->sysctl = NULL;
45281da177e4SLinus Torvalds 	unregister_sysctl_table(t->sysctl_header);
45291dab6222SPavel Emelyanov 	kfree(t->dev_name);
45301da177e4SLinus Torvalds 	kfree(t);
45311da177e4SLinus Torvalds }
4532408c4768SPavel Emelyanov 
4533408c4768SPavel Emelyanov static void addrconf_sysctl_register(struct inet6_dev *idev)
4534408c4768SPavel Emelyanov {
453554716e3bSEric W. Biederman 	neigh_sysctl_register(idev->dev, idev->nd_parms, "ipv6",
4536f8572d8fSEric W. Biederman 			      &ndisc_ifinfo_sysctl_change);
4537c346dca1SYOSHIFUJI Hideaki 	__addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name,
4538f8572d8fSEric W. Biederman 					idev, &idev->cnf);
4539408c4768SPavel Emelyanov }
4540408c4768SPavel Emelyanov 
4541408c4768SPavel Emelyanov static void addrconf_sysctl_unregister(struct inet6_dev *idev)
4542408c4768SPavel Emelyanov {
4543408c4768SPavel Emelyanov 	__addrconf_sysctl_unregister(&idev->cnf);
4544408c4768SPavel Emelyanov 	neigh_sysctl_unregister(idev->nd_parms);
45451da177e4SLinus Torvalds }
45461da177e4SLinus Torvalds 
45471da177e4SLinus Torvalds 
45481da177e4SLinus Torvalds #endif
45491da177e4SLinus Torvalds 
45502c8c1e72SAlexey Dobriyan static int __net_init addrconf_init_net(struct net *net)
4551e0da5a48SPavel Emelyanov {
4552e0da5a48SPavel Emelyanov 	int err;
4553e0da5a48SPavel Emelyanov 	struct ipv6_devconf *all, *dflt;
4554e0da5a48SPavel Emelyanov 
4555e0da5a48SPavel Emelyanov 	err = -ENOMEM;
4556e0da5a48SPavel Emelyanov 	all = &ipv6_devconf;
4557e0da5a48SPavel Emelyanov 	dflt = &ipv6_devconf_dflt;
4558e0da5a48SPavel Emelyanov 
455909ad9bc7SOctavian Purdila 	if (!net_eq(net, &init_net)) {
4560e0da5a48SPavel Emelyanov 		all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL);
4561e0da5a48SPavel Emelyanov 		if (all == NULL)
4562e0da5a48SPavel Emelyanov 			goto err_alloc_all;
4563e0da5a48SPavel Emelyanov 
4564e0da5a48SPavel Emelyanov 		dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL);
4565e0da5a48SPavel Emelyanov 		if (dflt == NULL)
4566e0da5a48SPavel Emelyanov 			goto err_alloc_dflt;
456756d417b1SBrian Haley 	} else {
456856d417b1SBrian Haley 		/* these will be inherited by all namespaces */
456956d417b1SBrian Haley 		dflt->autoconf = ipv6_defaults.autoconf;
457056d417b1SBrian Haley 		dflt->disable_ipv6 = ipv6_defaults.disable_ipv6;
4571e0da5a48SPavel Emelyanov 	}
4572e0da5a48SPavel Emelyanov 
4573e0da5a48SPavel Emelyanov 	net->ipv6.devconf_all = all;
4574e0da5a48SPavel Emelyanov 	net->ipv6.devconf_dflt = dflt;
4575e0da5a48SPavel Emelyanov 
4576e0da5a48SPavel Emelyanov #ifdef CONFIG_SYSCTL
4577f8572d8fSEric W. Biederman 	err = __addrconf_sysctl_register(net, "all", NULL, all);
4578e0da5a48SPavel Emelyanov 	if (err < 0)
4579e0da5a48SPavel Emelyanov 		goto err_reg_all;
4580e0da5a48SPavel Emelyanov 
4581f8572d8fSEric W. Biederman 	err = __addrconf_sysctl_register(net, "default", NULL, dflt);
4582e0da5a48SPavel Emelyanov 	if (err < 0)
4583e0da5a48SPavel Emelyanov 		goto err_reg_dflt;
4584e0da5a48SPavel Emelyanov #endif
4585e0da5a48SPavel Emelyanov 	return 0;
4586e0da5a48SPavel Emelyanov 
4587e0da5a48SPavel Emelyanov #ifdef CONFIG_SYSCTL
4588e0da5a48SPavel Emelyanov err_reg_dflt:
4589e0da5a48SPavel Emelyanov 	__addrconf_sysctl_unregister(all);
4590e0da5a48SPavel Emelyanov err_reg_all:
4591e0da5a48SPavel Emelyanov 	kfree(dflt);
4592e0da5a48SPavel Emelyanov #endif
4593e0da5a48SPavel Emelyanov err_alloc_dflt:
4594e0da5a48SPavel Emelyanov 	kfree(all);
4595e0da5a48SPavel Emelyanov err_alloc_all:
4596e0da5a48SPavel Emelyanov 	return err;
4597e0da5a48SPavel Emelyanov }
4598e0da5a48SPavel Emelyanov 
45992c8c1e72SAlexey Dobriyan static void __net_exit addrconf_exit_net(struct net *net)
4600e0da5a48SPavel Emelyanov {
4601e0da5a48SPavel Emelyanov #ifdef CONFIG_SYSCTL
4602e0da5a48SPavel Emelyanov 	__addrconf_sysctl_unregister(net->ipv6.devconf_dflt);
4603e0da5a48SPavel Emelyanov 	__addrconf_sysctl_unregister(net->ipv6.devconf_all);
4604e0da5a48SPavel Emelyanov #endif
460509ad9bc7SOctavian Purdila 	if (!net_eq(net, &init_net)) {
4606e0da5a48SPavel Emelyanov 		kfree(net->ipv6.devconf_dflt);
4607e0da5a48SPavel Emelyanov 		kfree(net->ipv6.devconf_all);
4608e0da5a48SPavel Emelyanov 	}
4609e0da5a48SPavel Emelyanov }
4610e0da5a48SPavel Emelyanov 
4611e0da5a48SPavel Emelyanov static struct pernet_operations addrconf_ops = {
4612e0da5a48SPavel Emelyanov 	.init = addrconf_init_net,
4613e0da5a48SPavel Emelyanov 	.exit = addrconf_exit_net,
4614e0da5a48SPavel Emelyanov };
4615e0da5a48SPavel Emelyanov 
46161da177e4SLinus Torvalds /*
46171da177e4SLinus Torvalds  *      Device notifier
46181da177e4SLinus Torvalds  */
46191da177e4SLinus Torvalds 
46201da177e4SLinus Torvalds int register_inet6addr_notifier(struct notifier_block *nb)
46211da177e4SLinus Torvalds {
4622e041c683SAlan Stern 	return atomic_notifier_chain_register(&inet6addr_chain, nb);
46231da177e4SLinus Torvalds }
46247159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(register_inet6addr_notifier);
46257159039aSYOSHIFUJI Hideaki 
46261da177e4SLinus Torvalds int unregister_inet6addr_notifier(struct notifier_block *nb)
46271da177e4SLinus Torvalds {
4628e041c683SAlan Stern 	return atomic_notifier_chain_unregister(&inet6addr_chain, nb);
46291da177e4SLinus Torvalds }
46307159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(unregister_inet6addr_notifier);
46317159039aSYOSHIFUJI Hideaki 
46321da177e4SLinus Torvalds /*
46331da177e4SLinus Torvalds  *	Init / cleanup code
46341da177e4SLinus Torvalds  */
46351da177e4SLinus Torvalds 
46361da177e4SLinus Torvalds int __init addrconf_init(void)
46371da177e4SLinus Torvalds {
4638c2e21293Sstephen hemminger 	int i, err;
46392a8cc6c8SYOSHIFUJI Hideaki 
4640e21e8467SStephen Hemminger 	err = ipv6_addr_label_init();
4641e21e8467SStephen Hemminger 	if (err < 0) {
4642e21e8467SStephen Hemminger 		printk(KERN_CRIT "IPv6 Addrconf:"
4643e21e8467SStephen Hemminger 		       " cannot initialize default policy table: %d.\n", err);
46442cc6d2bfSNeil Horman 		goto out;
46452a8cc6c8SYOSHIFUJI Hideaki 	}
46461da177e4SLinus Torvalds 
46472cc6d2bfSNeil Horman 	err = register_pernet_subsys(&addrconf_ops);
46482cc6d2bfSNeil Horman 	if (err < 0)
46492cc6d2bfSNeil Horman 		goto out_addrlabel;
4650e0da5a48SPavel Emelyanov 
46511da177e4SLinus Torvalds 	/* The addrconf netdev notifier requires that loopback_dev
46521da177e4SLinus Torvalds 	 * has it's ipv6 private information allocated and setup
46531da177e4SLinus Torvalds 	 * before it can bring up and give link-local addresses
46541da177e4SLinus Torvalds 	 * to other devices which are up.
46551da177e4SLinus Torvalds 	 *
46561da177e4SLinus Torvalds 	 * Unfortunately, loopback_dev is not necessarily the first
46571da177e4SLinus Torvalds 	 * entry in the global dev_base list of net devices.  In fact,
46581da177e4SLinus Torvalds 	 * it is likely to be the very last entry on that list.
46591da177e4SLinus Torvalds 	 * So this causes the notifier registry below to try and
46601da177e4SLinus Torvalds 	 * give link-local addresses to all devices besides loopback_dev
46611da177e4SLinus Torvalds 	 * first, then loopback_dev, which cases all the non-loopback_dev
46621da177e4SLinus Torvalds 	 * devices to fail to get a link-local address.
46631da177e4SLinus Torvalds 	 *
46641da177e4SLinus Torvalds 	 * So, as a temporary fix, allocate the ipv6 structure for
46651da177e4SLinus Torvalds 	 * loopback_dev first by hand.
46661da177e4SLinus Torvalds 	 * Longer term, all of the dependencies ipv6 has upon the loopback
46671da177e4SLinus Torvalds 	 * device and it being up should be removed.
46681da177e4SLinus Torvalds 	 */
46691da177e4SLinus Torvalds 	rtnl_lock();
46702774c7abSEric W. Biederman 	if (!ipv6_add_dev(init_net.loopback_dev))
46711da177e4SLinus Torvalds 		err = -ENOMEM;
46721da177e4SLinus Torvalds 	rtnl_unlock();
46731da177e4SLinus Torvalds 	if (err)
4674e0da5a48SPavel Emelyanov 		goto errlo;
46751da177e4SLinus Torvalds 
4676c2e21293Sstephen hemminger 	for (i = 0; i < IN6_ADDR_HSIZE; i++)
4677c2e21293Sstephen hemminger 		INIT_HLIST_HEAD(&inet6_addr_lst[i]);
4678c2e21293Sstephen hemminger 
46791da177e4SLinus Torvalds 	register_netdevice_notifier(&ipv6_dev_notf);
46801da177e4SLinus Torvalds 
46811da177e4SLinus Torvalds 	addrconf_verify(0);
4682c127ea2cSThomas Graf 
4683c127ea2cSThomas Graf 	err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo);
4684c127ea2cSThomas Graf 	if (err < 0)
4685c127ea2cSThomas Graf 		goto errout;
4686c127ea2cSThomas Graf 
4687c127ea2cSThomas Graf 	/* Only the first call to __rtnl_register can fail */
4688c127ea2cSThomas Graf 	__rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL);
4689c127ea2cSThomas Graf 	__rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL);
4690c127ea2cSThomas Graf 	__rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr);
4691c127ea2cSThomas Graf 	__rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr);
4692c127ea2cSThomas Graf 	__rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr);
4693c127ea2cSThomas Graf 
46942a8cc6c8SYOSHIFUJI Hideaki 	ipv6_addr_label_rtnl_register();
46952a8cc6c8SYOSHIFUJI Hideaki 
46961da177e4SLinus Torvalds 	return 0;
4697c127ea2cSThomas Graf errout:
4698c127ea2cSThomas Graf 	unregister_netdevice_notifier(&ipv6_dev_notf);
4699e0da5a48SPavel Emelyanov errlo:
4700e0da5a48SPavel Emelyanov 	unregister_pernet_subsys(&addrconf_ops);
47012cc6d2bfSNeil Horman out_addrlabel:
47022cc6d2bfSNeil Horman 	ipv6_addr_label_cleanup();
47032cc6d2bfSNeil Horman out:
4704c127ea2cSThomas Graf 	return err;
47051da177e4SLinus Torvalds }
47061da177e4SLinus Torvalds 
470709f7709fSDaniel Lezcano void addrconf_cleanup(void)
47081da177e4SLinus Torvalds {
4709176c39afSDaniel Lezcano 	struct net_device *dev;
47101da177e4SLinus Torvalds 	int i;
47111da177e4SLinus Torvalds 
47121da177e4SLinus Torvalds 	unregister_netdevice_notifier(&ipv6_dev_notf);
4713e0da5a48SPavel Emelyanov 	unregister_pernet_subsys(&addrconf_ops);
47142cc6d2bfSNeil Horman 	ipv6_addr_label_cleanup();
47151da177e4SLinus Torvalds 
47161da177e4SLinus Torvalds 	rtnl_lock();
47171da177e4SLinus Torvalds 
4718176c39afSDaniel Lezcano 	/* clean dev list */
4719176c39afSDaniel Lezcano 	for_each_netdev(&init_net, dev) {
4720176c39afSDaniel Lezcano 		if (__in6_dev_get(dev) == NULL)
4721176c39afSDaniel Lezcano 			continue;
4722176c39afSDaniel Lezcano 		addrconf_ifdown(dev, 1);
4723176c39afSDaniel Lezcano 	}
4724176c39afSDaniel Lezcano 	addrconf_ifdown(init_net.loopback_dev, 2);
4725176c39afSDaniel Lezcano 
47261da177e4SLinus Torvalds 	/*
47271da177e4SLinus Torvalds 	 *	Check hash table.
47281da177e4SLinus Torvalds 	 */
47295c578aedSstephen hemminger 	spin_lock_bh(&addrconf_hash_lock);
4730c2e21293Sstephen hemminger 	for (i = 0; i < IN6_ADDR_HSIZE; i++)
4731c2e21293Sstephen hemminger 		WARN_ON(!hlist_empty(&inet6_addr_lst[i]));
47325c578aedSstephen hemminger 	spin_unlock_bh(&addrconf_hash_lock);
47331da177e4SLinus Torvalds 
47341da177e4SLinus Torvalds 	del_timer(&addr_chk_timer);
47351da177e4SLinus Torvalds 	rtnl_unlock();
47361da177e4SLinus Torvalds }
4737