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 1251da177e4SLinus Torvalds static int desync_factor = MAX_DESYNC_FACTOR * HZ; 1261da177e4SLinus Torvalds #endif 1271da177e4SLinus Torvalds 1281b34be74SYOSHIFUJI Hideaki static int ipv6_generate_eui64(u8 *eui, struct net_device *dev); 1291da177e4SLinus Torvalds static int ipv6_count_addresses(struct inet6_dev *idev); 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds /* 1321da177e4SLinus Torvalds * Configured unicast address hash table 1331da177e4SLinus Torvalds */ 134c2e21293Sstephen hemminger static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE]; 1355c578aedSstephen hemminger static DEFINE_SPINLOCK(addrconf_hash_lock); 1361da177e4SLinus Torvalds 1371da177e4SLinus Torvalds static void addrconf_verify(unsigned long); 1381da177e4SLinus Torvalds 1398d06afabSIngo Molnar static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0); 1401da177e4SLinus Torvalds static DEFINE_SPINLOCK(addrconf_verify_lock); 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds static void addrconf_join_anycast(struct inet6_ifaddr *ifp); 1431da177e4SLinus Torvalds static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); 1441da177e4SLinus Torvalds 14593d9b7d7SJiri Pirko static void addrconf_type_change(struct net_device *dev, 14675c78500SMoni Shoua unsigned long event); 1471da177e4SLinus Torvalds static int addrconf_ifdown(struct net_device *dev, int how); 1481da177e4SLinus Torvalds 149e431b8c0SJamal Hadi Salim static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags); 1501da177e4SLinus Torvalds static void addrconf_dad_timer(unsigned long data); 1511da177e4SLinus Torvalds static void addrconf_dad_completed(struct inet6_ifaddr *ifp); 152c5e33bddSYOSHIFUJI Hideaki static void addrconf_dad_run(struct inet6_dev *idev); 1531da177e4SLinus Torvalds static void addrconf_rs_timer(unsigned long data); 1541da177e4SLinus Torvalds static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); 1551da177e4SLinus Torvalds static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); 1561da177e4SLinus Torvalds 1571da177e4SLinus Torvalds static void inet6_prefix_notify(int event, struct inet6_dev *idev, 1581da177e4SLinus Torvalds struct prefix_info *pinfo); 1593e81c6daSDavid S. Miller static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, 16006bfe655SDaniel Lezcano struct net_device *dev); 1611da177e4SLinus Torvalds 162e041c683SAlan Stern static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); 1631da177e4SLinus Torvalds 164888c848eSAdrian Bunk static struct ipv6_devconf ipv6_devconf __read_mostly = { 1651da177e4SLinus Torvalds .forwarding = 0, 1661da177e4SLinus Torvalds .hop_limit = IPV6_DEFAULT_HOPLIMIT, 1671da177e4SLinus Torvalds .mtu6 = IPV6_MIN_MTU, 1681da177e4SLinus Torvalds .accept_ra = 1, 1691da177e4SLinus Torvalds .accept_redirects = 1, 1701da177e4SLinus Torvalds .autoconf = 1, 1711da177e4SLinus Torvalds .force_mld_version = 0, 1721da177e4SLinus Torvalds .dad_transmits = 1, 1731da177e4SLinus Torvalds .rtr_solicits = MAX_RTR_SOLICITATIONS, 1741da177e4SLinus Torvalds .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, 1751da177e4SLinus Torvalds .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, 1761da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 1771da177e4SLinus Torvalds .use_tempaddr = 0, 1781da177e4SLinus Torvalds .temp_valid_lft = TEMP_VALID_LIFETIME, 1791da177e4SLinus Torvalds .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, 1801da177e4SLinus Torvalds .regen_max_retry = REGEN_MAX_RETRY, 1811da177e4SLinus Torvalds .max_desync_factor = MAX_DESYNC_FACTOR, 1821da177e4SLinus Torvalds #endif 1831da177e4SLinus Torvalds .max_addresses = IPV6_MAX_ADDRESSES, 18465f5c7c1SYOSHIFUJI Hideaki .accept_ra_defrtr = 1, 185c4fd30ebSYOSHIFUJI Hideaki .accept_ra_pinfo = 1, 186930d6ff2SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_ROUTER_PREF 187930d6ff2SYOSHIFUJI Hideaki .accept_ra_rtr_pref = 1, 18852e16356SYOSHIFUJI Hideaki .rtr_probe_interval = 60 * HZ, 18909c884d4SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_ROUTE_INFO 19009c884d4SYOSHIFUJI Hideaki .accept_ra_rt_info_max_plen = 0, 19109c884d4SYOSHIFUJI Hideaki #endif 192930d6ff2SYOSHIFUJI Hideaki #endif 193fbea49e1SYOSHIFUJI Hideaki .proxy_ndp = 0, 1940bcbc926SYOSHIFUJI Hideaki .accept_source_route = 0, /* we do not accept RH0 by default. */ 195778d80beSYOSHIFUJI Hideaki .disable_ipv6 = 0, 1961b34be74SYOSHIFUJI Hideaki .accept_dad = 1, 1971da177e4SLinus Torvalds }; 1981da177e4SLinus Torvalds 199ab32ea5dSBrian Haley static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { 2001da177e4SLinus Torvalds .forwarding = 0, 2011da177e4SLinus Torvalds .hop_limit = IPV6_DEFAULT_HOPLIMIT, 2021da177e4SLinus Torvalds .mtu6 = IPV6_MIN_MTU, 2031da177e4SLinus Torvalds .accept_ra = 1, 2041da177e4SLinus Torvalds .accept_redirects = 1, 2051da177e4SLinus Torvalds .autoconf = 1, 2061da177e4SLinus Torvalds .dad_transmits = 1, 2071da177e4SLinus Torvalds .rtr_solicits = MAX_RTR_SOLICITATIONS, 2081da177e4SLinus Torvalds .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, 2091da177e4SLinus Torvalds .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, 2101da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 2111da177e4SLinus Torvalds .use_tempaddr = 0, 2121da177e4SLinus Torvalds .temp_valid_lft = TEMP_VALID_LIFETIME, 2131da177e4SLinus Torvalds .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, 2141da177e4SLinus Torvalds .regen_max_retry = REGEN_MAX_RETRY, 2151da177e4SLinus Torvalds .max_desync_factor = MAX_DESYNC_FACTOR, 2161da177e4SLinus Torvalds #endif 2171da177e4SLinus Torvalds .max_addresses = IPV6_MAX_ADDRESSES, 21865f5c7c1SYOSHIFUJI Hideaki .accept_ra_defrtr = 1, 219c4fd30ebSYOSHIFUJI Hideaki .accept_ra_pinfo = 1, 220930d6ff2SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_ROUTER_PREF 221930d6ff2SYOSHIFUJI Hideaki .accept_ra_rtr_pref = 1, 22252e16356SYOSHIFUJI Hideaki .rtr_probe_interval = 60 * HZ, 22309c884d4SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_ROUTE_INFO 22409c884d4SYOSHIFUJI Hideaki .accept_ra_rt_info_max_plen = 0, 22509c884d4SYOSHIFUJI Hideaki #endif 226930d6ff2SYOSHIFUJI Hideaki #endif 227fbea49e1SYOSHIFUJI Hideaki .proxy_ndp = 0, 2280bcbc926SYOSHIFUJI Hideaki .accept_source_route = 0, /* we do not accept RH0 by default. */ 229778d80beSYOSHIFUJI Hideaki .disable_ipv6 = 0, 2301b34be74SYOSHIFUJI Hideaki .accept_dad = 1, 2311da177e4SLinus Torvalds }; 2321da177e4SLinus Torvalds 2331da177e4SLinus Torvalds /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ 2341da177e4SLinus Torvalds const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; 2351da177e4SLinus Torvalds const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; 236f3ee4010SYOSHIFUJI Hideaki const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT; 237f3ee4010SYOSHIFUJI Hideaki const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; 2381da177e4SLinus Torvalds 239f24e3d65SMitsuru Chinen /* Check if a valid qdisc is available */ 24005297949SDavid S. Miller static inline bool addrconf_qdisc_ok(const struct net_device *dev) 241f24e3d65SMitsuru Chinen { 24205297949SDavid S. Miller return !qdisc_tx_is_noop(dev); 243f24e3d65SMitsuru Chinen } 244f24e3d65SMitsuru Chinen 2452b5ead46SYOSHIFUJI Hideaki /* Check if a route is valid prefix route */ 2462b5ead46SYOSHIFUJI Hideaki static inline int addrconf_is_prefix_route(const struct rt6_info *rt) 2472b5ead46SYOSHIFUJI Hideaki { 2482b5ead46SYOSHIFUJI Hideaki return ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0); 2492b5ead46SYOSHIFUJI Hideaki } 2502b5ead46SYOSHIFUJI Hideaki 2511da177e4SLinus Torvalds static void addrconf_del_timer(struct inet6_ifaddr *ifp) 2521da177e4SLinus Torvalds { 2531da177e4SLinus Torvalds if (del_timer(&ifp->timer)) 2541da177e4SLinus Torvalds __in6_ifa_put(ifp); 2551da177e4SLinus Torvalds } 2561da177e4SLinus Torvalds 257e21e8467SStephen Hemminger enum addrconf_timer_t { 2581da177e4SLinus Torvalds AC_NONE, 2591da177e4SLinus Torvalds AC_DAD, 2601da177e4SLinus Torvalds AC_RS, 2611da177e4SLinus Torvalds }; 2621da177e4SLinus Torvalds 2631da177e4SLinus Torvalds static void addrconf_mod_timer(struct inet6_ifaddr *ifp, 2641da177e4SLinus Torvalds enum addrconf_timer_t what, 2651da177e4SLinus Torvalds unsigned long when) 2661da177e4SLinus Torvalds { 2671da177e4SLinus Torvalds if (!del_timer(&ifp->timer)) 2681da177e4SLinus Torvalds in6_ifa_hold(ifp); 2691da177e4SLinus Torvalds 2701da177e4SLinus Torvalds switch (what) { 2711da177e4SLinus Torvalds case AC_DAD: 2721da177e4SLinus Torvalds ifp->timer.function = addrconf_dad_timer; 2731da177e4SLinus Torvalds break; 2741da177e4SLinus Torvalds case AC_RS: 2751da177e4SLinus Torvalds ifp->timer.function = addrconf_rs_timer; 2761da177e4SLinus Torvalds break; 277e21e8467SStephen Hemminger default: 278e21e8467SStephen Hemminger break; 2791da177e4SLinus Torvalds } 2801da177e4SLinus Torvalds ifp->timer.expires = jiffies + when; 2811da177e4SLinus Torvalds add_timer(&ifp->timer); 2821da177e4SLinus Torvalds } 2831da177e4SLinus Torvalds 2847f7d9a6bSHerbert Xu static int snmp6_alloc_dev(struct inet6_dev *idev) 2857f7d9a6bSHerbert Xu { 2867d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)idev->stats.ipv6, 287c69bce20SYOSHIFUJI Hideaki sizeof(struct ipstats_mib)) < 0) 2887f7d9a6bSHerbert Xu goto err_ip; 2897d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)idev->stats.icmpv6, 290c69bce20SYOSHIFUJI Hideaki sizeof(struct icmpv6_mib)) < 0) 2917f7d9a6bSHerbert Xu goto err_icmp; 2927d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)idev->stats.icmpv6msg, 293c69bce20SYOSHIFUJI Hideaki sizeof(struct icmpv6msg_mib)) < 0) 29414878f75SDavid L Stevens goto err_icmpmsg; 2957f7d9a6bSHerbert Xu 2967f7d9a6bSHerbert Xu return 0; 2977f7d9a6bSHerbert Xu 29814878f75SDavid L Stevens err_icmpmsg: 2997d720c3eSTejun Heo snmp_mib_free((void __percpu **)idev->stats.icmpv6); 3007f7d9a6bSHerbert Xu err_icmp: 3017d720c3eSTejun Heo snmp_mib_free((void __percpu **)idev->stats.ipv6); 3027f7d9a6bSHerbert Xu err_ip: 303aaf70ec7SPavel Emelyanov return -ENOMEM; 3047f7d9a6bSHerbert Xu } 3057f7d9a6bSHerbert Xu 30616910b98SPavel Emelyanov static void snmp6_free_dev(struct inet6_dev *idev) 3077f7d9a6bSHerbert Xu { 3087d720c3eSTejun Heo snmp_mib_free((void __percpu **)idev->stats.icmpv6msg); 3097d720c3eSTejun Heo snmp_mib_free((void __percpu **)idev->stats.icmpv6); 3107d720c3eSTejun Heo snmp_mib_free((void __percpu **)idev->stats.ipv6); 3117f7d9a6bSHerbert Xu } 3127f7d9a6bSHerbert Xu 3131da177e4SLinus Torvalds /* Nobody refers to this device, we may destroy it. */ 3141da177e4SLinus Torvalds 3158814c4b5SYOSHIFUJI Hideaki static void in6_dev_finish_destroy_rcu(struct rcu_head *head) 3168814c4b5SYOSHIFUJI Hideaki { 3178814c4b5SYOSHIFUJI Hideaki struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu); 3188814c4b5SYOSHIFUJI Hideaki kfree(idev); 3198814c4b5SYOSHIFUJI Hideaki } 3208814c4b5SYOSHIFUJI Hideaki 3211da177e4SLinus Torvalds void in6_dev_finish_destroy(struct inet6_dev *idev) 3221da177e4SLinus Torvalds { 3231da177e4SLinus Torvalds struct net_device *dev = idev->dev; 324547b792cSIlpo Järvinen 325502a2ffdSstephen hemminger WARN_ON(!list_empty(&idev->addr_list)); 326547b792cSIlpo Järvinen WARN_ON(idev->mc_list != NULL); 327547b792cSIlpo Järvinen 3281da177e4SLinus Torvalds #ifdef NET_REFCNT_DEBUG 3291da177e4SLinus Torvalds printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL"); 3301da177e4SLinus Torvalds #endif 3311da177e4SLinus Torvalds dev_put(dev); 3321da177e4SLinus Torvalds if (!idev->dead) { 333e21e8467SStephen Hemminger pr_warning("Freeing alive inet6 device %p\n", idev); 3341da177e4SLinus Torvalds return; 3351da177e4SLinus Torvalds } 3361da177e4SLinus Torvalds snmp6_free_dev(idev); 3378814c4b5SYOSHIFUJI Hideaki call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu); 3381da177e4SLinus Torvalds } 3391da177e4SLinus Torvalds 3407159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(in6_dev_finish_destroy); 3417159039aSYOSHIFUJI Hideaki 3421da177e4SLinus Torvalds static struct inet6_dev * ipv6_add_dev(struct net_device *dev) 3431da177e4SLinus Torvalds { 3441da177e4SLinus Torvalds struct inet6_dev *ndev; 3451da177e4SLinus Torvalds 3461da177e4SLinus Torvalds ASSERT_RTNL(); 3471da177e4SLinus Torvalds 3481da177e4SLinus Torvalds if (dev->mtu < IPV6_MIN_MTU) 3491da177e4SLinus Torvalds return NULL; 3501da177e4SLinus Torvalds 351322f74a4SIngo Oeser ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); 3521da177e4SLinus Torvalds 353322f74a4SIngo Oeser if (ndev == NULL) 354322f74a4SIngo Oeser return NULL; 3551da177e4SLinus Torvalds 3561da177e4SLinus Torvalds rwlock_init(&ndev->lock); 3571da177e4SLinus Torvalds ndev->dev = dev; 358502a2ffdSstephen hemminger INIT_LIST_HEAD(&ndev->addr_list); 359502a2ffdSstephen hemminger 360c346dca1SYOSHIFUJI Hideaki memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); 3611da177e4SLinus Torvalds ndev->cnf.mtu6 = dev->mtu; 3621da177e4SLinus Torvalds ndev->cnf.sysctl = NULL; 3631da177e4SLinus Torvalds ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); 3641da177e4SLinus Torvalds if (ndev->nd_parms == NULL) { 3651da177e4SLinus Torvalds kfree(ndev); 3661da177e4SLinus Torvalds return NULL; 3671da177e4SLinus Torvalds } 3680187bdfbSBen Hutchings if (ndev->cnf.forwarding) 3690187bdfbSBen Hutchings dev_disable_lro(dev); 3701da177e4SLinus Torvalds /* We refer to the device */ 3711da177e4SLinus Torvalds dev_hold(dev); 3721da177e4SLinus Torvalds 3731da177e4SLinus Torvalds if (snmp6_alloc_dev(ndev) < 0) { 3741da177e4SLinus Torvalds ADBG((KERN_WARNING 3751da177e4SLinus Torvalds "%s(): cannot allocate memory for statistics; dev=%s.\n", 3760dc47877SHarvey Harrison __func__, dev->name)); 3771da177e4SLinus Torvalds neigh_parms_release(&nd_tbl, ndev->nd_parms); 3781da177e4SLinus Torvalds ndev->dead = 1; 3791da177e4SLinus Torvalds in6_dev_finish_destroy(ndev); 3801da177e4SLinus Torvalds return NULL; 3811da177e4SLinus Torvalds } 3821da177e4SLinus Torvalds 3831da177e4SLinus Torvalds if (snmp6_register_dev(ndev) < 0) { 3841da177e4SLinus Torvalds ADBG((KERN_WARNING 3851da177e4SLinus Torvalds "%s(): cannot create /proc/net/dev_snmp6/%s\n", 3860dc47877SHarvey Harrison __func__, dev->name)); 3871da177e4SLinus Torvalds neigh_parms_release(&nd_tbl, ndev->nd_parms); 3881da177e4SLinus Torvalds ndev->dead = 1; 3891da177e4SLinus Torvalds in6_dev_finish_destroy(ndev); 3901da177e4SLinus Torvalds return NULL; 3911da177e4SLinus Torvalds } 3921da177e4SLinus Torvalds 3931da177e4SLinus Torvalds /* One reference from device. We must do this before 3941da177e4SLinus Torvalds * we invoke __ipv6_regen_rndid(). 3951da177e4SLinus Torvalds */ 3961da177e4SLinus Torvalds in6_dev_hold(ndev); 3971da177e4SLinus Torvalds 3981b34be74SYOSHIFUJI Hideaki if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) 3991b34be74SYOSHIFUJI Hideaki ndev->cnf.accept_dad = -1; 4001b34be74SYOSHIFUJI Hideaki 4010be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) 402c7dc89c0SFred L. Templin if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { 403c7dc89c0SFred L. Templin printk(KERN_INFO 404c7dc89c0SFred L. Templin "%s: Disabled Multicast RS\n", 405c7dc89c0SFred L. Templin dev->name); 406c7dc89c0SFred L. Templin ndev->cnf.rtr_solicits = 0; 407c7dc89c0SFred L. Templin } 408b077d7abSYOSHIFUJI Hideaki #endif 409b077d7abSYOSHIFUJI Hideaki 4101da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 411372e6c8fSstephen hemminger INIT_LIST_HEAD(&ndev->tempaddr_list); 4121da177e4SLinus Torvalds setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); 4131da177e4SLinus Torvalds if ((dev->flags&IFF_LOOPBACK) || 4141da177e4SLinus Torvalds dev->type == ARPHRD_TUNNEL || 4159625ed72SYOSHIFUJI Hideaki dev->type == ARPHRD_TUNNEL6 || 4161da177e4SLinus Torvalds dev->type == ARPHRD_SIT || 4171da177e4SLinus Torvalds dev->type == ARPHRD_NONE) { 4181da177e4SLinus Torvalds printk(KERN_INFO 4191da177e4SLinus Torvalds "%s: Disabled Privacy Extensions\n", 4201da177e4SLinus Torvalds dev->name); 4211da177e4SLinus Torvalds ndev->cnf.use_tempaddr = -1; 4221da177e4SLinus Torvalds } else { 4231da177e4SLinus Torvalds in6_dev_hold(ndev); 4241da177e4SLinus Torvalds ipv6_regen_rndid((unsigned long) ndev); 4251da177e4SLinus Torvalds } 4261da177e4SLinus Torvalds #endif 4271da177e4SLinus Torvalds 428f24e3d65SMitsuru Chinen if (netif_running(dev) && addrconf_qdisc_ok(dev)) 42953aadcc9SHerbert Xu ndev->if_flags |= IF_READY; 43053aadcc9SHerbert Xu 4311da177e4SLinus Torvalds ipv6_mc_init_dev(ndev); 4321da177e4SLinus Torvalds ndev->tstamp = jiffies; 433f52295a9SPavel Emelyanov addrconf_sysctl_register(ndev); 43430c4cf57SDavid L Stevens /* protected by rtnl_lock */ 43530c4cf57SDavid L Stevens rcu_assign_pointer(dev->ip6_ptr, ndev); 436d88ae4ccSYOSHIFUJI Hideaki 437d88ae4ccSYOSHIFUJI Hideaki /* Join all-node multicast group */ 438f3ee4010SYOSHIFUJI Hideaki ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); 439d88ae4ccSYOSHIFUJI Hideaki 4401da177e4SLinus Torvalds return ndev; 4411da177e4SLinus Torvalds } 4421da177e4SLinus Torvalds 443cee89473SYOSHIFUJI Hideaki static struct inet6_dev * ipv6_find_idev(struct net_device *dev) 4441da177e4SLinus Torvalds { 4451da177e4SLinus Torvalds struct inet6_dev *idev; 4461da177e4SLinus Torvalds 4471da177e4SLinus Torvalds ASSERT_RTNL(); 4481da177e4SLinus Torvalds 449e21e8467SStephen Hemminger idev = __in6_dev_get(dev); 450e21e8467SStephen Hemminger if (!idev) { 451e21e8467SStephen Hemminger idev = ipv6_add_dev(dev); 452e21e8467SStephen Hemminger if (!idev) 4531da177e4SLinus Torvalds return NULL; 4541da177e4SLinus Torvalds } 455c5e33bddSYOSHIFUJI Hideaki 4561da177e4SLinus Torvalds if (dev->flags&IFF_UP) 4571da177e4SLinus Torvalds ipv6_mc_up(idev); 4581da177e4SLinus Torvalds return idev; 4591da177e4SLinus Torvalds } 4601da177e4SLinus Torvalds 4611da177e4SLinus Torvalds #ifdef CONFIG_SYSCTL 4621da177e4SLinus Torvalds static void dev_forward_change(struct inet6_dev *idev) 4631da177e4SLinus Torvalds { 4641da177e4SLinus Torvalds struct net_device *dev; 4651da177e4SLinus Torvalds struct inet6_ifaddr *ifa; 4661da177e4SLinus Torvalds 4671da177e4SLinus Torvalds if (!idev) 4681da177e4SLinus Torvalds return; 4691da177e4SLinus Torvalds dev = idev->dev; 4700187bdfbSBen Hutchings if (idev->cnf.forwarding) 4710187bdfbSBen Hutchings dev_disable_lro(dev); 4721da177e4SLinus Torvalds if (dev && (dev->flags & IFF_MULTICAST)) { 4731da177e4SLinus Torvalds if (idev->cnf.forwarding) 474f3ee4010SYOSHIFUJI Hideaki ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); 4751da177e4SLinus Torvalds else 476f3ee4010SYOSHIFUJI Hideaki ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); 4771da177e4SLinus Torvalds } 478502a2ffdSstephen hemminger 479502a2ffdSstephen hemminger list_for_each_entry(ifa, &idev->addr_list, if_list) { 4802c12a74cSMichal Wrobel if (ifa->flags&IFA_F_TENTATIVE) 4812c12a74cSMichal Wrobel continue; 4821da177e4SLinus Torvalds if (idev->cnf.forwarding) 4831da177e4SLinus Torvalds addrconf_join_anycast(ifa); 4841da177e4SLinus Torvalds else 4851da177e4SLinus Torvalds addrconf_leave_anycast(ifa); 4861da177e4SLinus Torvalds } 4871da177e4SLinus Torvalds } 4881da177e4SLinus Torvalds 4891da177e4SLinus Torvalds 490e186932bSPavel Emelyanov static void addrconf_forward_change(struct net *net, __s32 newf) 4911da177e4SLinus Torvalds { 4921da177e4SLinus Torvalds struct net_device *dev; 4931da177e4SLinus Torvalds struct inet6_dev *idev; 4941da177e4SLinus Torvalds 4958814c4b5SYOSHIFUJI Hideaki rcu_read_lock(); 496c6d14c84SEric Dumazet for_each_netdev_rcu(net, dev) { 4971da177e4SLinus Torvalds idev = __in6_dev_get(dev); 4981da177e4SLinus Torvalds if (idev) { 499e186932bSPavel Emelyanov int changed = (!idev->cnf.forwarding) ^ (!newf); 500e186932bSPavel Emelyanov idev->cnf.forwarding = newf; 5011da177e4SLinus Torvalds if (changed) 5021da177e4SLinus Torvalds dev_forward_change(idev); 5031da177e4SLinus Torvalds } 5041da177e4SLinus Torvalds } 505c6d14c84SEric Dumazet rcu_read_unlock(); 5061da177e4SLinus Torvalds } 507c8fecf22SPavel Emelyanov 508b325fddbSStephen Hemminger static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old) 509c8fecf22SPavel Emelyanov { 510bff16c2fSPavel Emelyanov struct net *net; 511bff16c2fSPavel Emelyanov 512bff16c2fSPavel Emelyanov net = (struct net *)table->extra2; 513441fc2a2SPavel Emelyanov if (p == &net->ipv6.devconf_dflt->forwarding) 514b325fddbSStephen Hemminger return 0; 515c8fecf22SPavel Emelyanov 51688af182eSEric W. Biederman if (!rtnl_trylock()) { 51788af182eSEric W. Biederman /* Restore the original values before restarting */ 51888af182eSEric W. Biederman *p = old; 5195007392dSEric W. Biederman return restart_syscall(); 52088af182eSEric W. Biederman } 521b325fddbSStephen Hemminger 522e186932bSPavel Emelyanov if (p == &net->ipv6.devconf_all->forwarding) { 523e186932bSPavel Emelyanov __s32 newf = net->ipv6.devconf_all->forwarding; 524e186932bSPavel Emelyanov net->ipv6.devconf_dflt->forwarding = newf; 525e186932bSPavel Emelyanov addrconf_forward_change(net, newf); 526c8fecf22SPavel Emelyanov } else if ((!*p) ^ (!old)) 527c8fecf22SPavel Emelyanov dev_forward_change((struct inet6_dev *)table->extra1); 5280187bdfbSBen Hutchings rtnl_unlock(); 529c8fecf22SPavel Emelyanov 530c8fecf22SPavel Emelyanov if (*p) 5317b4da532SDaniel Lezcano rt6_purge_dflt_routers(net); 532b325fddbSStephen Hemminger return 1; 533c8fecf22SPavel Emelyanov } 5341da177e4SLinus Torvalds #endif 5351da177e4SLinus Torvalds 5365c578aedSstephen hemminger static void inet6_ifa_finish_destroy_rcu(struct rcu_head *head) 5375c578aedSstephen hemminger { 5385c578aedSstephen hemminger struct inet6_ifaddr *ifp = container_of(head, struct inet6_ifaddr, rcu); 5395c578aedSstephen hemminger kfree(ifp); 5405c578aedSstephen hemminger } 5411da177e4SLinus Torvalds 5425c578aedSstephen hemminger /* Nobody refers to this ifaddr, destroy it */ 5431da177e4SLinus Torvalds void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) 5441da177e4SLinus Torvalds { 545c2e21293Sstephen hemminger WARN_ON(!hlist_unhashed(&ifp->addr_lst)); 546547b792cSIlpo Järvinen 5471da177e4SLinus Torvalds #ifdef NET_REFCNT_DEBUG 5481da177e4SLinus Torvalds printk(KERN_DEBUG "inet6_ifa_finish_destroy\n"); 5491da177e4SLinus Torvalds #endif 5501da177e4SLinus Torvalds 5511da177e4SLinus Torvalds in6_dev_put(ifp->idev); 5521da177e4SLinus Torvalds 5531da177e4SLinus Torvalds if (del_timer(&ifp->timer)) 554e21e8467SStephen Hemminger pr_notice("Timer is still running, when freeing ifa=%p\n", ifp); 5551da177e4SLinus Torvalds 556e9d3e084SHerbert Xu if (ifp->state != INET6_IFADDR_STATE_DEAD) { 557e21e8467SStephen Hemminger pr_warning("Freeing alive inet6 address %p\n", ifp); 5581da177e4SLinus Torvalds return; 5591da177e4SLinus Torvalds } 5601da177e4SLinus Torvalds dst_release(&ifp->rt->u.dst); 5611da177e4SLinus Torvalds 5625c578aedSstephen hemminger call_rcu(&ifp->rcu, inet6_ifa_finish_destroy_rcu); 5631da177e4SLinus Torvalds } 5641da177e4SLinus Torvalds 565e55ffac6SBrian Haley static void 566e55ffac6SBrian Haley ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) 567e55ffac6SBrian Haley { 568502a2ffdSstephen hemminger struct list_head *p; 5698a6ce0c0SYOSHIFUJI Hideaki int ifp_scope = ipv6_addr_src_scope(&ifp->addr); 570e55ffac6SBrian Haley 571e55ffac6SBrian Haley /* 572e55ffac6SBrian Haley * Each device address list is sorted in order of scope - 573e55ffac6SBrian Haley * global before linklocal. 574e55ffac6SBrian Haley */ 575502a2ffdSstephen hemminger list_for_each(p, &idev->addr_list) { 576502a2ffdSstephen hemminger struct inet6_ifaddr *ifa 577502a2ffdSstephen hemminger = list_entry(p, struct inet6_ifaddr, if_list); 5788a6ce0c0SYOSHIFUJI Hideaki if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) 579e55ffac6SBrian Haley break; 580e55ffac6SBrian Haley } 581e55ffac6SBrian Haley 582b54c9b98SDavid S. Miller list_add_tail(&ifp->if_list, p); 583e55ffac6SBrian Haley } 584e55ffac6SBrian Haley 5853a88a81dSstephen hemminger static u32 ipv6_addr_hash(const struct in6_addr *addr) 5863eb84f49SYOSHIFUJI Hideaki { 5873eb84f49SYOSHIFUJI Hideaki /* 5883eb84f49SYOSHIFUJI Hideaki * We perform the hash function over the last 64 bits of the address 5893eb84f49SYOSHIFUJI Hideaki * This will include the IEEE address token on links that support it. 5903eb84f49SYOSHIFUJI Hideaki */ 5910eae88f3SEric Dumazet return jhash_2words((__force u32)addr->s6_addr32[2], 5920eae88f3SEric Dumazet (__force u32)addr->s6_addr32[3], 0) 5933a88a81dSstephen hemminger & (IN6_ADDR_HSIZE - 1); 5943eb84f49SYOSHIFUJI Hideaki } 5953eb84f49SYOSHIFUJI Hideaki 5961da177e4SLinus Torvalds /* On success it returns ifp with increased reference count */ 5971da177e4SLinus Torvalds 5981da177e4SLinus Torvalds static struct inet6_ifaddr * 5991da177e4SLinus Torvalds ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, 600e431b8c0SJamal Hadi Salim int scope, u32 flags) 6011da177e4SLinus Torvalds { 6021da177e4SLinus Torvalds struct inet6_ifaddr *ifa = NULL; 6031da177e4SLinus Torvalds struct rt6_info *rt; 6043a88a81dSstephen hemminger unsigned int hash; 6051da177e4SLinus Torvalds int err = 0; 606d68b8270SYOSHIFUJI Hideaki int addr_type = ipv6_addr_type(addr); 607d68b8270SYOSHIFUJI Hideaki 608d68b8270SYOSHIFUJI Hideaki if (addr_type == IPV6_ADDR_ANY || 609d68b8270SYOSHIFUJI Hideaki addr_type & IPV6_ADDR_MULTICAST || 610d68b8270SYOSHIFUJI Hideaki (!(idev->dev->flags & IFF_LOOPBACK) && 611d68b8270SYOSHIFUJI Hideaki addr_type & IPV6_ADDR_LOOPBACK)) 612d68b8270SYOSHIFUJI Hideaki return ERR_PTR(-EADDRNOTAVAIL); 6131da177e4SLinus Torvalds 6148814c4b5SYOSHIFUJI Hideaki rcu_read_lock_bh(); 6151da177e4SLinus Torvalds if (idev->dead) { 6161da177e4SLinus Torvalds err = -ENODEV; /*XXX*/ 6171da177e4SLinus Torvalds goto out2; 6181da177e4SLinus Torvalds } 6191da177e4SLinus Torvalds 62056d417b1SBrian Haley if (idev->cnf.disable_ipv6) { 6219bdd8d40SBrian Haley err = -EACCES; 6229bdd8d40SBrian Haley goto out2; 6239bdd8d40SBrian Haley } 6249bdd8d40SBrian Haley 6255c578aedSstephen hemminger spin_lock(&addrconf_hash_lock); 6261da177e4SLinus Torvalds 6271da177e4SLinus Torvalds /* Ignore adding duplicate addresses on an interface */ 628c346dca1SYOSHIFUJI Hideaki if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { 6291da177e4SLinus Torvalds ADBG(("ipv6_add_addr: already assigned\n")); 6301da177e4SLinus Torvalds err = -EEXIST; 6311da177e4SLinus Torvalds goto out; 6321da177e4SLinus Torvalds } 6331da177e4SLinus Torvalds 634322f74a4SIngo Oeser ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); 6351da177e4SLinus Torvalds 6361da177e4SLinus Torvalds if (ifa == NULL) { 6371da177e4SLinus Torvalds ADBG(("ipv6_add_addr: malloc failed\n")); 6381da177e4SLinus Torvalds err = -ENOBUFS; 6391da177e4SLinus Torvalds goto out; 6401da177e4SLinus Torvalds } 6411da177e4SLinus Torvalds 6421da177e4SLinus Torvalds rt = addrconf_dst_alloc(idev, addr, 0); 6431da177e4SLinus Torvalds if (IS_ERR(rt)) { 6441da177e4SLinus Torvalds err = PTR_ERR(rt); 6451da177e4SLinus Torvalds goto out; 6461da177e4SLinus Torvalds } 6471da177e4SLinus Torvalds 6481da177e4SLinus Torvalds ipv6_addr_copy(&ifa->addr, addr); 6491da177e4SLinus Torvalds 6501da177e4SLinus Torvalds spin_lock_init(&ifa->lock); 651e9d3e084SHerbert Xu spin_lock_init(&ifa->state_lock); 6521da177e4SLinus Torvalds init_timer(&ifa->timer); 653c2e21293Sstephen hemminger INIT_HLIST_NODE(&ifa->addr_lst); 6541da177e4SLinus Torvalds ifa->timer.data = (unsigned long) ifa; 6551da177e4SLinus Torvalds ifa->scope = scope; 6561da177e4SLinus Torvalds ifa->prefix_len = pfxlen; 6571da177e4SLinus Torvalds ifa->flags = flags | IFA_F_TENTATIVE; 6581da177e4SLinus Torvalds ifa->cstamp = ifa->tstamp = jiffies; 6591da177e4SLinus Torvalds 66057f5f544SKeir Fraser ifa->rt = rt; 66157f5f544SKeir Fraser 66295c385b4SNeil Horman /* 66395c385b4SNeil Horman * part one of RFC 4429, section 3.3 66495c385b4SNeil Horman * We should not configure an address as 66595c385b4SNeil Horman * optimistic if we do not yet know the link 66695c385b4SNeil Horman * layer address of our nexhop router 66795c385b4SNeil Horman */ 66895c385b4SNeil Horman 66995c385b4SNeil Horman if (rt->rt6i_nexthop == NULL) 67095c385b4SNeil Horman ifa->flags &= ~IFA_F_OPTIMISTIC; 67195c385b4SNeil Horman 6721da177e4SLinus Torvalds ifa->idev = idev; 6731da177e4SLinus Torvalds in6_dev_hold(idev); 6741da177e4SLinus Torvalds /* For caller */ 6751da177e4SLinus Torvalds in6_ifa_hold(ifa); 6761da177e4SLinus Torvalds 6771da177e4SLinus Torvalds /* Add to big hash table */ 6781da177e4SLinus Torvalds hash = ipv6_addr_hash(addr); 6791da177e4SLinus Torvalds 6805c578aedSstephen hemminger hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]); 6815c578aedSstephen hemminger spin_unlock(&addrconf_hash_lock); 6821da177e4SLinus Torvalds 6831da177e4SLinus Torvalds write_lock(&idev->lock); 6841da177e4SLinus Torvalds /* Add to inet6_dev unicast addr list. */ 685e55ffac6SBrian Haley ipv6_link_dev_addr(idev, ifa); 6861da177e4SLinus Torvalds 6871da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 6881da177e4SLinus Torvalds if (ifa->flags&IFA_F_TEMPORARY) { 689372e6c8fSstephen hemminger list_add(&ifa->tmp_list, &idev->tempaddr_list); 6901da177e4SLinus Torvalds in6_ifa_hold(ifa); 6911da177e4SLinus Torvalds } 6921da177e4SLinus Torvalds #endif 6931da177e4SLinus Torvalds 6941da177e4SLinus Torvalds in6_ifa_hold(ifa); 6951da177e4SLinus Torvalds write_unlock(&idev->lock); 6961da177e4SLinus Torvalds out2: 6978814c4b5SYOSHIFUJI Hideaki rcu_read_unlock_bh(); 6981da177e4SLinus Torvalds 699fd92833aSYOSHIFUJI Hideaki if (likely(err == 0)) 700e041c683SAlan Stern atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); 7011da177e4SLinus Torvalds else { 7021da177e4SLinus Torvalds kfree(ifa); 7031da177e4SLinus Torvalds ifa = ERR_PTR(err); 7041da177e4SLinus Torvalds } 7051da177e4SLinus Torvalds 7061da177e4SLinus Torvalds return ifa; 7071da177e4SLinus Torvalds out: 7085c578aedSstephen hemminger spin_unlock(&addrconf_hash_lock); 7091da177e4SLinus Torvalds goto out2; 7101da177e4SLinus Torvalds } 7111da177e4SLinus Torvalds 7121da177e4SLinus Torvalds /* This function wants to get referenced ifp and releases it before return */ 7131da177e4SLinus Torvalds 7141da177e4SLinus Torvalds static void ipv6_del_addr(struct inet6_ifaddr *ifp) 7151da177e4SLinus Torvalds { 716502a2ffdSstephen hemminger struct inet6_ifaddr *ifa, *ifn; 7171da177e4SLinus Torvalds struct inet6_dev *idev = ifp->idev; 7184c5ff6a6SHerbert Xu int state; 7191da177e4SLinus Torvalds int hash; 7201da177e4SLinus Torvalds int deleted = 0, onlink = 0; 7211da177e4SLinus Torvalds unsigned long expires = jiffies; 7221da177e4SLinus Torvalds 7231da177e4SLinus Torvalds hash = ipv6_addr_hash(&ifp->addr); 7241da177e4SLinus Torvalds 7254c5ff6a6SHerbert Xu spin_lock_bh(&ifp->state_lock); 7264c5ff6a6SHerbert Xu state = ifp->state; 727e9d3e084SHerbert Xu ifp->state = INET6_IFADDR_STATE_DEAD; 7284c5ff6a6SHerbert Xu spin_unlock_bh(&ifp->state_lock); 7294c5ff6a6SHerbert Xu 7304c5ff6a6SHerbert Xu if (state == INET6_IFADDR_STATE_DEAD) 7314c5ff6a6SHerbert Xu goto out; 7321da177e4SLinus Torvalds 7335c578aedSstephen hemminger spin_lock_bh(&addrconf_hash_lock); 7345c578aedSstephen hemminger hlist_del_init_rcu(&ifp->addr_lst); 7355c578aedSstephen hemminger spin_unlock_bh(&addrconf_hash_lock); 7361da177e4SLinus Torvalds 7371da177e4SLinus Torvalds write_lock_bh(&idev->lock); 7381da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 7391da177e4SLinus Torvalds if (ifp->flags&IFA_F_TEMPORARY) { 740372e6c8fSstephen hemminger list_del(&ifp->tmp_list); 7411da177e4SLinus Torvalds if (ifp->ifpub) { 7421da177e4SLinus Torvalds in6_ifa_put(ifp->ifpub); 7431da177e4SLinus Torvalds ifp->ifpub = NULL; 7441da177e4SLinus Torvalds } 7451da177e4SLinus Torvalds __in6_ifa_put(ifp); 7461da177e4SLinus Torvalds } 7471da177e4SLinus Torvalds #endif 7481da177e4SLinus Torvalds 749502a2ffdSstephen hemminger list_for_each_entry_safe(ifa, ifn, &idev->addr_list, if_list) { 7501da177e4SLinus Torvalds if (ifa == ifp) { 751502a2ffdSstephen hemminger list_del_init(&ifp->if_list); 7521da177e4SLinus Torvalds __in6_ifa_put(ifp); 753502a2ffdSstephen hemminger 7541da177e4SLinus Torvalds if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) 7551da177e4SLinus Torvalds break; 7561da177e4SLinus Torvalds deleted = 1; 7571d142804SKristian Slavov continue; 7581da177e4SLinus Torvalds } else if (ifp->flags & IFA_F_PERMANENT) { 7591da177e4SLinus Torvalds if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, 7601da177e4SLinus Torvalds ifp->prefix_len)) { 7611da177e4SLinus Torvalds if (ifa->flags & IFA_F_PERMANENT) { 7621da177e4SLinus Torvalds onlink = 1; 7631da177e4SLinus Torvalds if (deleted) 7641da177e4SLinus Torvalds break; 7651da177e4SLinus Torvalds } else { 7661da177e4SLinus Torvalds unsigned long lifetime; 7671da177e4SLinus Torvalds 7681da177e4SLinus Torvalds if (!onlink) 7691da177e4SLinus Torvalds onlink = -1; 7701da177e4SLinus Torvalds 7711da177e4SLinus Torvalds spin_lock(&ifa->lock); 7724bed72e4SYOSHIFUJI Hideaki 7734bed72e4SYOSHIFUJI Hideaki lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); 7744bed72e4SYOSHIFUJI Hideaki /* 7754bed72e4SYOSHIFUJI Hideaki * Note: Because this address is 7764bed72e4SYOSHIFUJI Hideaki * not permanent, lifetime < 7774bed72e4SYOSHIFUJI Hideaki * LONG_MAX / HZ here. 7784bed72e4SYOSHIFUJI Hideaki */ 7791da177e4SLinus Torvalds if (time_before(expires, 7801da177e4SLinus Torvalds ifa->tstamp + lifetime * HZ)) 7811da177e4SLinus Torvalds expires = ifa->tstamp + lifetime * HZ; 7821da177e4SLinus Torvalds spin_unlock(&ifa->lock); 7831da177e4SLinus Torvalds } 7841da177e4SLinus Torvalds } 7851da177e4SLinus Torvalds } 7861da177e4SLinus Torvalds } 7871da177e4SLinus Torvalds write_unlock_bh(&idev->lock); 7881da177e4SLinus Torvalds 789b2238566SAndrey Vagin addrconf_del_timer(ifp); 790b2238566SAndrey Vagin 7911da177e4SLinus Torvalds ipv6_ifa_notify(RTM_DELADDR, ifp); 7921da177e4SLinus Torvalds 793e041c683SAlan Stern atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); 7941da177e4SLinus Torvalds 7951da177e4SLinus Torvalds /* 7961da177e4SLinus Torvalds * Purge or update corresponding prefix 7971da177e4SLinus Torvalds * 7981da177e4SLinus Torvalds * 1) we don't purge prefix here if address was not permanent. 7991da177e4SLinus Torvalds * prefix is managed by its own lifetime. 8001da177e4SLinus Torvalds * 2) if there're no addresses, delete prefix. 8011da177e4SLinus Torvalds * 3) if there're still other permanent address(es), 8021da177e4SLinus Torvalds * corresponding prefix is still permanent. 8031da177e4SLinus Torvalds * 4) otherwise, update prefix lifetime to the 8041da177e4SLinus Torvalds * longest valid lifetime among the corresponding 8051da177e4SLinus Torvalds * addresses on the device. 8061da177e4SLinus Torvalds * Note: subsequent RA will update lifetime. 8071da177e4SLinus Torvalds * 8081da177e4SLinus Torvalds * --yoshfuji 8091da177e4SLinus Torvalds */ 8101da177e4SLinus Torvalds if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { 8111da177e4SLinus Torvalds struct in6_addr prefix; 8121da177e4SLinus Torvalds struct rt6_info *rt; 813c346dca1SYOSHIFUJI Hideaki struct net *net = dev_net(ifp->idev->dev); 8141da177e4SLinus Torvalds ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); 8156fda7350SBenjamin Thery rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1); 8161da177e4SLinus Torvalds 8172b5ead46SYOSHIFUJI Hideaki if (rt && addrconf_is_prefix_route(rt)) { 8181da177e4SLinus Torvalds if (onlink == 0) { 819e0a1ad73SThomas Graf ip6_del_rt(rt); 8201da177e4SLinus Torvalds rt = NULL; 8211da177e4SLinus Torvalds } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { 8221da177e4SLinus Torvalds rt->rt6i_expires = expires; 8231da177e4SLinus Torvalds rt->rt6i_flags |= RTF_EXPIRES; 8241da177e4SLinus Torvalds } 8251da177e4SLinus Torvalds } 8261da177e4SLinus Torvalds dst_release(&rt->u.dst); 8271da177e4SLinus Torvalds } 8281da177e4SLinus Torvalds 8294c5ff6a6SHerbert Xu out: 8301da177e4SLinus Torvalds in6_ifa_put(ifp); 8311da177e4SLinus Torvalds } 8321da177e4SLinus Torvalds 8331da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 8341da177e4SLinus Torvalds static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) 8351da177e4SLinus Torvalds { 8361da177e4SLinus Torvalds struct inet6_dev *idev = ifp->idev; 8371da177e4SLinus Torvalds struct in6_addr addr, *tmpaddr; 8381da177e4SLinus Torvalds unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp; 839eac55bf9SBenoit Boissinot unsigned long regen_advance; 8401da177e4SLinus Torvalds int tmp_plen; 8411da177e4SLinus Torvalds int ret = 0; 8421da177e4SLinus Torvalds int max_addresses; 84395c385b4SNeil Horman u32 addr_flags; 8441da177e4SLinus Torvalds 8451da177e4SLinus Torvalds write_lock(&idev->lock); 8461da177e4SLinus Torvalds if (ift) { 8471da177e4SLinus Torvalds spin_lock_bh(&ift->lock); 8481da177e4SLinus Torvalds memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); 8491da177e4SLinus Torvalds spin_unlock_bh(&ift->lock); 8501da177e4SLinus Torvalds tmpaddr = &addr; 8511da177e4SLinus Torvalds } else { 8521da177e4SLinus Torvalds tmpaddr = NULL; 8531da177e4SLinus Torvalds } 8541da177e4SLinus Torvalds retry: 8551da177e4SLinus Torvalds in6_dev_hold(idev); 8561da177e4SLinus Torvalds if (idev->cnf.use_tempaddr <= 0) { 8571da177e4SLinus Torvalds write_unlock(&idev->lock); 8581da177e4SLinus Torvalds printk(KERN_INFO 8591da177e4SLinus Torvalds "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); 8601da177e4SLinus Torvalds in6_dev_put(idev); 8611da177e4SLinus Torvalds ret = -1; 8621da177e4SLinus Torvalds goto out; 8631da177e4SLinus Torvalds } 8641da177e4SLinus Torvalds spin_lock_bh(&ifp->lock); 8651da177e4SLinus Torvalds if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { 8661da177e4SLinus Torvalds idev->cnf.use_tempaddr = -1; /*XXX*/ 8671da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 8681da177e4SLinus Torvalds write_unlock(&idev->lock); 8691da177e4SLinus Torvalds printk(KERN_WARNING 8701da177e4SLinus Torvalds "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); 8711da177e4SLinus Torvalds in6_dev_put(idev); 8721da177e4SLinus Torvalds ret = -1; 8731da177e4SLinus Torvalds goto out; 8741da177e4SLinus Torvalds } 8751da177e4SLinus Torvalds in6_ifa_hold(ifp); 8761da177e4SLinus Torvalds memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); 8771da177e4SLinus Torvalds if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { 8781da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 8791da177e4SLinus Torvalds write_unlock(&idev->lock); 8801da177e4SLinus Torvalds printk(KERN_WARNING 8811da177e4SLinus Torvalds "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); 8821da177e4SLinus Torvalds in6_ifa_put(ifp); 8831da177e4SLinus Torvalds in6_dev_put(idev); 8841da177e4SLinus Torvalds ret = -1; 8851da177e4SLinus Torvalds goto out; 8861da177e4SLinus Torvalds } 8871da177e4SLinus Torvalds memcpy(&addr.s6_addr[8], idev->rndid, 8); 8881da177e4SLinus Torvalds tmp_valid_lft = min_t(__u32, 8891da177e4SLinus Torvalds ifp->valid_lft, 8901da177e4SLinus Torvalds idev->cnf.temp_valid_lft); 8911da177e4SLinus Torvalds tmp_prefered_lft = min_t(__u32, 8921da177e4SLinus Torvalds ifp->prefered_lft, 8931da177e4SLinus Torvalds idev->cnf.temp_prefered_lft - desync_factor / HZ); 8941da177e4SLinus Torvalds tmp_plen = ifp->prefix_len; 8951da177e4SLinus Torvalds max_addresses = idev->cnf.max_addresses; 8961da177e4SLinus Torvalds tmp_cstamp = ifp->cstamp; 8971da177e4SLinus Torvalds tmp_tstamp = ifp->tstamp; 8981da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 8991da177e4SLinus Torvalds 900eac55bf9SBenoit Boissinot regen_advance = idev->cnf.regen_max_retry * 901eac55bf9SBenoit Boissinot idev->cnf.dad_transmits * 902eac55bf9SBenoit Boissinot idev->nd_parms->retrans_time / HZ; 9031da177e4SLinus Torvalds write_unlock(&idev->lock); 90495c385b4SNeil Horman 905eac55bf9SBenoit Boissinot /* A temporary address is created only if this calculated Preferred 906eac55bf9SBenoit Boissinot * Lifetime is greater than REGEN_ADVANCE time units. In particular, 907eac55bf9SBenoit Boissinot * an implementation must not create a temporary address with a zero 908eac55bf9SBenoit Boissinot * Preferred Lifetime. 909eac55bf9SBenoit Boissinot */ 910eac55bf9SBenoit Boissinot if (tmp_prefered_lft <= regen_advance) { 911eac55bf9SBenoit Boissinot in6_ifa_put(ifp); 912eac55bf9SBenoit Boissinot in6_dev_put(idev); 913eac55bf9SBenoit Boissinot ret = -1; 914eac55bf9SBenoit Boissinot goto out; 915eac55bf9SBenoit Boissinot } 916eac55bf9SBenoit Boissinot 91795c385b4SNeil Horman addr_flags = IFA_F_TEMPORARY; 91895c385b4SNeil Horman /* set in addrconf_prefix_rcv() */ 91995c385b4SNeil Horman if (ifp->flags & IFA_F_OPTIMISTIC) 92095c385b4SNeil Horman addr_flags |= IFA_F_OPTIMISTIC; 92195c385b4SNeil Horman 9221da177e4SLinus Torvalds ift = !max_addresses || 9231da177e4SLinus Torvalds ipv6_count_addresses(idev) < max_addresses ? 9241da177e4SLinus Torvalds ipv6_add_addr(idev, &addr, tmp_plen, 92595c385b4SNeil Horman ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, 92695c385b4SNeil Horman addr_flags) : NULL; 9271da177e4SLinus Torvalds if (!ift || IS_ERR(ift)) { 9281da177e4SLinus Torvalds in6_ifa_put(ifp); 9291da177e4SLinus Torvalds in6_dev_put(idev); 9301da177e4SLinus Torvalds printk(KERN_INFO 9311da177e4SLinus Torvalds "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); 9321da177e4SLinus Torvalds tmpaddr = &addr; 9331da177e4SLinus Torvalds write_lock(&idev->lock); 9341da177e4SLinus Torvalds goto retry; 9351da177e4SLinus Torvalds } 9361da177e4SLinus Torvalds 9371da177e4SLinus Torvalds spin_lock_bh(&ift->lock); 9381da177e4SLinus Torvalds ift->ifpub = ifp; 9391da177e4SLinus Torvalds ift->valid_lft = tmp_valid_lft; 9401da177e4SLinus Torvalds ift->prefered_lft = tmp_prefered_lft; 9411da177e4SLinus Torvalds ift->cstamp = tmp_cstamp; 9421da177e4SLinus Torvalds ift->tstamp = tmp_tstamp; 9431da177e4SLinus Torvalds spin_unlock_bh(&ift->lock); 9441da177e4SLinus Torvalds 9451da177e4SLinus Torvalds addrconf_dad_start(ift, 0); 9461da177e4SLinus Torvalds in6_ifa_put(ift); 9471da177e4SLinus Torvalds in6_dev_put(idev); 9481da177e4SLinus Torvalds out: 9491da177e4SLinus Torvalds return ret; 9501da177e4SLinus Torvalds } 9511da177e4SLinus Torvalds #endif 9521da177e4SLinus Torvalds 9531da177e4SLinus Torvalds /* 954072047e4SYOSHIFUJI Hideaki * Choose an appropriate source address (RFC3484) 9551da177e4SLinus Torvalds */ 956a9b05723SYOSHIFUJI Hideaki enum { 957a9b05723SYOSHIFUJI Hideaki IPV6_SADDR_RULE_INIT = 0, 958a9b05723SYOSHIFUJI Hideaki IPV6_SADDR_RULE_LOCAL, 959a9b05723SYOSHIFUJI Hideaki IPV6_SADDR_RULE_SCOPE, 960a9b05723SYOSHIFUJI Hideaki IPV6_SADDR_RULE_PREFERRED, 961a9b05723SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_MIP6 962a9b05723SYOSHIFUJI Hideaki IPV6_SADDR_RULE_HOA, 963a9b05723SYOSHIFUJI Hideaki #endif 964a9b05723SYOSHIFUJI Hideaki IPV6_SADDR_RULE_OIF, 965a9b05723SYOSHIFUJI Hideaki IPV6_SADDR_RULE_LABEL, 966a9b05723SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_PRIVACY 967a9b05723SYOSHIFUJI Hideaki IPV6_SADDR_RULE_PRIVACY, 968a9b05723SYOSHIFUJI Hideaki #endif 969a9b05723SYOSHIFUJI Hideaki IPV6_SADDR_RULE_ORCHID, 970a9b05723SYOSHIFUJI Hideaki IPV6_SADDR_RULE_PREFIX, 971a9b05723SYOSHIFUJI Hideaki IPV6_SADDR_RULE_MAX 972072047e4SYOSHIFUJI Hideaki }; 973072047e4SYOSHIFUJI Hideaki 974a9b05723SYOSHIFUJI Hideaki struct ipv6_saddr_score { 975a9b05723SYOSHIFUJI Hideaki int rule; 976a9b05723SYOSHIFUJI Hideaki int addr_type; 977a9b05723SYOSHIFUJI Hideaki struct inet6_ifaddr *ifa; 978a9b05723SYOSHIFUJI Hideaki DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); 979a9b05723SYOSHIFUJI Hideaki int scopedist; 980a9b05723SYOSHIFUJI Hideaki int matchlen; 981a9b05723SYOSHIFUJI Hideaki }; 982a9b05723SYOSHIFUJI Hideaki 983a9b05723SYOSHIFUJI Hideaki struct ipv6_saddr_dst { 9849acd9f3aSYOSHIFUJI Hideaki const struct in6_addr *addr; 985a9b05723SYOSHIFUJI Hideaki int ifindex; 986a9b05723SYOSHIFUJI Hideaki int scope; 987a9b05723SYOSHIFUJI Hideaki int label; 9887cbca67cSYOSHIFUJI Hideaki unsigned int prefs; 989a9b05723SYOSHIFUJI Hideaki }; 990072047e4SYOSHIFUJI Hideaki 991b6f99a21SDave Jones static inline int ipv6_saddr_preferred(int type) 9921da177e4SLinus Torvalds { 99345bb0060SUlrich Weber if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK)) 994072047e4SYOSHIFUJI Hideaki return 1; 995072047e4SYOSHIFUJI Hideaki return 0; 9961da177e4SLinus Torvalds } 9971da177e4SLinus Torvalds 9983de23255SBenjamin Thery static int ipv6_get_saddr_eval(struct net *net, 9993de23255SBenjamin Thery struct ipv6_saddr_score *score, 1000a9b05723SYOSHIFUJI Hideaki struct ipv6_saddr_dst *dst, 1001a9b05723SYOSHIFUJI Hideaki int i) 1002a9b05723SYOSHIFUJI Hideaki { 1003a9b05723SYOSHIFUJI Hideaki int ret; 1004a9b05723SYOSHIFUJI Hideaki 1005a9b05723SYOSHIFUJI Hideaki if (i <= score->rule) { 1006a9b05723SYOSHIFUJI Hideaki switch (i) { 1007a9b05723SYOSHIFUJI Hideaki case IPV6_SADDR_RULE_SCOPE: 1008a9b05723SYOSHIFUJI Hideaki ret = score->scopedist; 1009a9b05723SYOSHIFUJI Hideaki break; 1010a9b05723SYOSHIFUJI Hideaki case IPV6_SADDR_RULE_PREFIX: 1011a9b05723SYOSHIFUJI Hideaki ret = score->matchlen; 1012a9b05723SYOSHIFUJI Hideaki break; 1013a9b05723SYOSHIFUJI Hideaki default: 1014a9b05723SYOSHIFUJI Hideaki ret = !!test_bit(i, score->scorebits); 1015a9b05723SYOSHIFUJI Hideaki } 1016a9b05723SYOSHIFUJI Hideaki goto out; 1017a9b05723SYOSHIFUJI Hideaki } 1018a9b05723SYOSHIFUJI Hideaki 1019a9b05723SYOSHIFUJI Hideaki switch (i) { 1020a9b05723SYOSHIFUJI Hideaki case IPV6_SADDR_RULE_INIT: 1021a9b05723SYOSHIFUJI Hideaki /* Rule 0: remember if hiscore is not ready yet */ 1022a9b05723SYOSHIFUJI Hideaki ret = !!score->ifa; 1023a9b05723SYOSHIFUJI Hideaki break; 1024a9b05723SYOSHIFUJI Hideaki case IPV6_SADDR_RULE_LOCAL: 1025a9b05723SYOSHIFUJI Hideaki /* Rule 1: Prefer same address */ 1026a9b05723SYOSHIFUJI Hideaki ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); 1027a9b05723SYOSHIFUJI Hideaki break; 1028a9b05723SYOSHIFUJI Hideaki case IPV6_SADDR_RULE_SCOPE: 1029a9b05723SYOSHIFUJI Hideaki /* Rule 2: Prefer appropriate scope 1030a9b05723SYOSHIFUJI Hideaki * 1031a9b05723SYOSHIFUJI Hideaki * ret 1032a9b05723SYOSHIFUJI Hideaki * ^ 1033a9b05723SYOSHIFUJI Hideaki * -1 | d 15 1034a9b05723SYOSHIFUJI Hideaki * ---+--+-+---> scope 1035a9b05723SYOSHIFUJI Hideaki * | 1036a9b05723SYOSHIFUJI Hideaki * | d is scope of the destination. 1037a9b05723SYOSHIFUJI Hideaki * B-d | \ 1038a9b05723SYOSHIFUJI Hideaki * | \ <- smaller scope is better if 1039a9b05723SYOSHIFUJI Hideaki * B-15 | \ if scope is enough for destinaion. 1040a9b05723SYOSHIFUJI Hideaki * | ret = B - scope (-1 <= scope >= d <= 15). 1041a9b05723SYOSHIFUJI Hideaki * d-C-1 | / 1042a9b05723SYOSHIFUJI Hideaki * |/ <- greater is better 1043a9b05723SYOSHIFUJI Hideaki * -C / if scope is not enough for destination. 1044a9b05723SYOSHIFUJI Hideaki * /| ret = scope - C (-1 <= d < scope <= 15). 1045a9b05723SYOSHIFUJI Hideaki * 1046a9b05723SYOSHIFUJI Hideaki * d - C - 1 < B -15 (for all -1 <= d <= 15). 1047a9b05723SYOSHIFUJI Hideaki * C > d + 14 - B >= 15 + 14 - B = 29 - B. 1048a9b05723SYOSHIFUJI Hideaki * Assume B = 0 and we get C > 29. 1049a9b05723SYOSHIFUJI Hideaki */ 1050a9b05723SYOSHIFUJI Hideaki ret = __ipv6_addr_src_scope(score->addr_type); 1051a9b05723SYOSHIFUJI Hideaki if (ret >= dst->scope) 1052a9b05723SYOSHIFUJI Hideaki ret = -ret; 1053a9b05723SYOSHIFUJI Hideaki else 1054a9b05723SYOSHIFUJI Hideaki ret -= 128; /* 30 is enough */ 1055a9b05723SYOSHIFUJI Hideaki score->scopedist = ret; 1056a9b05723SYOSHIFUJI Hideaki break; 1057a9b05723SYOSHIFUJI Hideaki case IPV6_SADDR_RULE_PREFERRED: 1058a9b05723SYOSHIFUJI Hideaki /* Rule 3: Avoid deprecated and optimistic addresses */ 1059a9b05723SYOSHIFUJI Hideaki ret = ipv6_saddr_preferred(score->addr_type) || 1060a9b05723SYOSHIFUJI Hideaki !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)); 1061a9b05723SYOSHIFUJI Hideaki break; 1062a9b05723SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_MIP6 1063a9b05723SYOSHIFUJI Hideaki case IPV6_SADDR_RULE_HOA: 10647cbca67cSYOSHIFUJI Hideaki { 1065a9b05723SYOSHIFUJI Hideaki /* Rule 4: Prefer home address */ 10667cbca67cSYOSHIFUJI Hideaki int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); 10677cbca67cSYOSHIFUJI Hideaki ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; 1068a9b05723SYOSHIFUJI Hideaki break; 10697cbca67cSYOSHIFUJI Hideaki } 1070a9b05723SYOSHIFUJI Hideaki #endif 1071a9b05723SYOSHIFUJI Hideaki case IPV6_SADDR_RULE_OIF: 1072a9b05723SYOSHIFUJI Hideaki /* Rule 5: Prefer outgoing interface */ 1073a9b05723SYOSHIFUJI Hideaki ret = (!dst->ifindex || 1074a9b05723SYOSHIFUJI Hideaki dst->ifindex == score->ifa->idev->dev->ifindex); 1075a9b05723SYOSHIFUJI Hideaki break; 1076a9b05723SYOSHIFUJI Hideaki case IPV6_SADDR_RULE_LABEL: 1077a9b05723SYOSHIFUJI Hideaki /* Rule 6: Prefer matching label */ 10783de23255SBenjamin Thery ret = ipv6_addr_label(net, 10793de23255SBenjamin Thery &score->ifa->addr, score->addr_type, 1080a9b05723SYOSHIFUJI Hideaki score->ifa->idev->dev->ifindex) == dst->label; 1081a9b05723SYOSHIFUJI Hideaki break; 1082a9b05723SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_PRIVACY 1083a9b05723SYOSHIFUJI Hideaki case IPV6_SADDR_RULE_PRIVACY: 10847cbca67cSYOSHIFUJI Hideaki { 1085a9b05723SYOSHIFUJI Hideaki /* Rule 7: Prefer public address 1086a9b05723SYOSHIFUJI Hideaki * Note: prefer temprary address if use_tempaddr >= 2 1087a9b05723SYOSHIFUJI Hideaki */ 10887cbca67cSYOSHIFUJI Hideaki int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? 10897cbca67cSYOSHIFUJI Hideaki !!(dst->prefs & IPV6_PREFER_SRC_TMP) : 10907cbca67cSYOSHIFUJI Hideaki score->ifa->idev->cnf.use_tempaddr >= 2; 10917cbca67cSYOSHIFUJI Hideaki ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; 1092a9b05723SYOSHIFUJI Hideaki break; 10937cbca67cSYOSHIFUJI Hideaki } 1094a9b05723SYOSHIFUJI Hideaki #endif 1095a9b05723SYOSHIFUJI Hideaki case IPV6_SADDR_RULE_ORCHID: 1096a9b05723SYOSHIFUJI Hideaki /* Rule 8-: Prefer ORCHID vs ORCHID or 1097a9b05723SYOSHIFUJI Hideaki * non-ORCHID vs non-ORCHID 1098a9b05723SYOSHIFUJI Hideaki */ 1099a9b05723SYOSHIFUJI Hideaki ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ 1100a9b05723SYOSHIFUJI Hideaki ipv6_addr_orchid(dst->addr)); 1101a9b05723SYOSHIFUJI Hideaki break; 1102a9b05723SYOSHIFUJI Hideaki case IPV6_SADDR_RULE_PREFIX: 1103a9b05723SYOSHIFUJI Hideaki /* Rule 8: Use longest matching prefix */ 1104a9b05723SYOSHIFUJI Hideaki score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr, 1105a9b05723SYOSHIFUJI Hideaki dst->addr); 1106a9b05723SYOSHIFUJI Hideaki break; 1107a9b05723SYOSHIFUJI Hideaki default: 1108a9b05723SYOSHIFUJI Hideaki ret = 0; 1109a9b05723SYOSHIFUJI Hideaki } 1110a9b05723SYOSHIFUJI Hideaki 1111a9b05723SYOSHIFUJI Hideaki if (ret) 1112a9b05723SYOSHIFUJI Hideaki __set_bit(i, score->scorebits); 1113a9b05723SYOSHIFUJI Hideaki score->rule = i; 1114a9b05723SYOSHIFUJI Hideaki out: 1115a9b05723SYOSHIFUJI Hideaki return ret; 1116a9b05723SYOSHIFUJI Hideaki } 1117a9b05723SYOSHIFUJI Hideaki 1118191cd582SBrian Haley int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev, 11199acd9f3aSYOSHIFUJI Hideaki const struct in6_addr *daddr, unsigned int prefs, 11207cbca67cSYOSHIFUJI Hideaki struct in6_addr *saddr) 11211da177e4SLinus Torvalds { 1122a9b05723SYOSHIFUJI Hideaki struct ipv6_saddr_score scores[2], 1123a9b05723SYOSHIFUJI Hideaki *score = &scores[0], *hiscore = &scores[1]; 1124a9b05723SYOSHIFUJI Hideaki struct ipv6_saddr_dst dst; 1125072047e4SYOSHIFUJI Hideaki struct net_device *dev; 1126a9b05723SYOSHIFUJI Hideaki int dst_type; 11271da177e4SLinus Torvalds 1128a9b05723SYOSHIFUJI Hideaki dst_type = __ipv6_addr_type(daddr); 1129a9b05723SYOSHIFUJI Hideaki dst.addr = daddr; 1130a9b05723SYOSHIFUJI Hideaki dst.ifindex = dst_dev ? dst_dev->ifindex : 0; 1131a9b05723SYOSHIFUJI Hideaki dst.scope = __ipv6_addr_src_scope(dst_type); 11323de23255SBenjamin Thery dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); 11337cbca67cSYOSHIFUJI Hideaki dst.prefs = prefs; 1134a9b05723SYOSHIFUJI Hideaki 1135a9b05723SYOSHIFUJI Hideaki hiscore->rule = -1; 1136a9b05723SYOSHIFUJI Hideaki hiscore->ifa = NULL; 11371da177e4SLinus Torvalds 11388814c4b5SYOSHIFUJI Hideaki rcu_read_lock(); 1139072047e4SYOSHIFUJI Hideaki 1140c6d14c84SEric Dumazet for_each_netdev_rcu(net, dev) { 1141072047e4SYOSHIFUJI Hideaki struct inet6_dev *idev; 1142072047e4SYOSHIFUJI Hideaki 1143a9b05723SYOSHIFUJI Hideaki /* Candidate Source Address (section 4) 1144072047e4SYOSHIFUJI Hideaki * - multicast and link-local destination address, 1145072047e4SYOSHIFUJI Hideaki * the set of candidate source address MUST only 1146072047e4SYOSHIFUJI Hideaki * include addresses assigned to interfaces 1147072047e4SYOSHIFUJI Hideaki * belonging to the same link as the outgoing 1148072047e4SYOSHIFUJI Hideaki * interface. 1149072047e4SYOSHIFUJI Hideaki * (- For site-local destination addresses, the 1150072047e4SYOSHIFUJI Hideaki * set of candidate source addresses MUST only 1151072047e4SYOSHIFUJI Hideaki * include addresses assigned to interfaces 1152072047e4SYOSHIFUJI Hideaki * belonging to the same site as the outgoing 1153072047e4SYOSHIFUJI Hideaki * interface.) 1154072047e4SYOSHIFUJI Hideaki */ 1155a9b05723SYOSHIFUJI Hideaki if (((dst_type & IPV6_ADDR_MULTICAST) || 1156a9b05723SYOSHIFUJI Hideaki dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && 1157a9b05723SYOSHIFUJI Hideaki dst.ifindex && dev->ifindex != dst.ifindex) 1158072047e4SYOSHIFUJI Hideaki continue; 1159072047e4SYOSHIFUJI Hideaki 11601da177e4SLinus Torvalds idev = __in6_dev_get(dev); 1161072047e4SYOSHIFUJI Hideaki if (!idev) 1162072047e4SYOSHIFUJI Hideaki continue; 1163072047e4SYOSHIFUJI Hideaki 11641da177e4SLinus Torvalds read_lock_bh(&idev->lock); 1165502a2ffdSstephen hemminger list_for_each_entry(score->ifa, &idev->addr_list, if_list) { 1166a9b05723SYOSHIFUJI Hideaki int i; 1167072047e4SYOSHIFUJI Hideaki 1168a9b05723SYOSHIFUJI Hideaki /* 11696b3ae80aSYOSHIFUJI Hideaki * - Tentative Address (RFC2462 section 5.4) 11706b3ae80aSYOSHIFUJI Hideaki * - A tentative address is not considered 11716b3ae80aSYOSHIFUJI Hideaki * "assigned to an interface" in the traditional 117295c385b4SNeil Horman * sense, unless it is also flagged as optimistic. 11736b3ae80aSYOSHIFUJI Hideaki * - Candidate Source Address (section 4) 1174072047e4SYOSHIFUJI Hideaki * - In any case, anycast addresses, multicast 1175072047e4SYOSHIFUJI Hideaki * addresses, and the unspecified address MUST 1176072047e4SYOSHIFUJI Hideaki * NOT be included in a candidate set. 1177072047e4SYOSHIFUJI Hideaki */ 1178a9b05723SYOSHIFUJI Hideaki if ((score->ifa->flags & IFA_F_TENTATIVE) && 1179a9b05723SYOSHIFUJI Hideaki (!(score->ifa->flags & IFA_F_OPTIMISTIC))) 11806b3ae80aSYOSHIFUJI Hideaki continue; 1181a9b05723SYOSHIFUJI Hideaki 1182a9b05723SYOSHIFUJI Hideaki score->addr_type = __ipv6_addr_type(&score->ifa->addr); 1183a9b05723SYOSHIFUJI Hideaki 1184a9b05723SYOSHIFUJI Hideaki if (unlikely(score->addr_type == IPV6_ADDR_ANY || 1185a9b05723SYOSHIFUJI Hideaki score->addr_type & IPV6_ADDR_MULTICAST)) { 1186072047e4SYOSHIFUJI Hideaki LIMIT_NETDEBUG(KERN_DEBUG 1187072047e4SYOSHIFUJI Hideaki "ADDRCONF: unspecified / multicast address " 1188072047e4SYOSHIFUJI Hideaki "assigned as unicast address on %s", 1189072047e4SYOSHIFUJI Hideaki dev->name); 11901da177e4SLinus Torvalds continue; 1191072047e4SYOSHIFUJI Hideaki } 1192072047e4SYOSHIFUJI Hideaki 1193a9b05723SYOSHIFUJI Hideaki score->rule = -1; 1194a9b05723SYOSHIFUJI Hideaki bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); 1195072047e4SYOSHIFUJI Hideaki 1196a9b05723SYOSHIFUJI Hideaki for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { 1197a9b05723SYOSHIFUJI Hideaki int minihiscore, miniscore; 1198072047e4SYOSHIFUJI Hideaki 11993de23255SBenjamin Thery minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i); 12003de23255SBenjamin Thery miniscore = ipv6_get_saddr_eval(net, score, &dst, i); 1201072047e4SYOSHIFUJI Hideaki 1202a9b05723SYOSHIFUJI Hideaki if (minihiscore > miniscore) { 1203a9b05723SYOSHIFUJI Hideaki if (i == IPV6_SADDR_RULE_SCOPE && 1204a9b05723SYOSHIFUJI Hideaki score->scopedist > 0) { 1205a9b05723SYOSHIFUJI Hideaki /* 1206a9b05723SYOSHIFUJI Hideaki * special case: 1207a9b05723SYOSHIFUJI Hideaki * each remaining entry 1208a9b05723SYOSHIFUJI Hideaki * has too small (not enough) 1209a9b05723SYOSHIFUJI Hideaki * scope, because ifa entries 1210a9b05723SYOSHIFUJI Hideaki * are sorted by their scope 1211a9b05723SYOSHIFUJI Hideaki * values. 1212072047e4SYOSHIFUJI Hideaki */ 1213a9b05723SYOSHIFUJI Hideaki goto try_nextdev; 1214072047e4SYOSHIFUJI Hideaki } 1215a9b05723SYOSHIFUJI Hideaki break; 1216a9b05723SYOSHIFUJI Hideaki } else if (minihiscore < miniscore) { 1217a9b05723SYOSHIFUJI Hideaki if (hiscore->ifa) 1218a9b05723SYOSHIFUJI Hideaki in6_ifa_put(hiscore->ifa); 121999cd07a5SJuha-Matti Tapio 1220a9b05723SYOSHIFUJI Hideaki in6_ifa_hold(score->ifa); 1221072047e4SYOSHIFUJI Hideaki 1222a0bffffcSIlpo Järvinen swap(hiscore, score); 1223a9b05723SYOSHIFUJI Hideaki 1224a9b05723SYOSHIFUJI Hideaki /* restore our iterator */ 1225a9b05723SYOSHIFUJI Hideaki score->ifa = hiscore->ifa; 1226a9b05723SYOSHIFUJI Hideaki 1227a9b05723SYOSHIFUJI Hideaki break; 12281da177e4SLinus Torvalds } 1229a9b05723SYOSHIFUJI Hideaki } 1230a9b05723SYOSHIFUJI Hideaki } 1231a9b05723SYOSHIFUJI Hideaki try_nextdev: 12321da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 12331da177e4SLinus Torvalds } 12348814c4b5SYOSHIFUJI Hideaki rcu_read_unlock(); 12351da177e4SLinus Torvalds 1236a9b05723SYOSHIFUJI Hideaki if (!hiscore->ifa) 1237072047e4SYOSHIFUJI Hideaki return -EADDRNOTAVAIL; 12381da177e4SLinus Torvalds 1239a9b05723SYOSHIFUJI Hideaki ipv6_addr_copy(saddr, &hiscore->ifa->addr); 1240a9b05723SYOSHIFUJI Hideaki in6_ifa_put(hiscore->ifa); 1241072047e4SYOSHIFUJI Hideaki return 0; 12421da177e4SLinus Torvalds } 12435e5f3f0fSYOSHIFUJI Hideaki EXPORT_SYMBOL(ipv6_dev_get_saddr); 12441da177e4SLinus Torvalds 124595c385b4SNeil Horman int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, 124695c385b4SNeil Horman unsigned char banned_flags) 12471da177e4SLinus Torvalds { 12481da177e4SLinus Torvalds struct inet6_dev *idev; 12491da177e4SLinus Torvalds int err = -EADDRNOTAVAIL; 12501da177e4SLinus Torvalds 12518814c4b5SYOSHIFUJI Hideaki rcu_read_lock(); 1252e21e8467SStephen Hemminger idev = __in6_dev_get(dev); 1253e21e8467SStephen Hemminger if (idev) { 12541da177e4SLinus Torvalds struct inet6_ifaddr *ifp; 12551da177e4SLinus Torvalds 12561da177e4SLinus Torvalds read_lock_bh(&idev->lock); 1257502a2ffdSstephen hemminger list_for_each_entry(ifp, &idev->addr_list, if_list) { 1258502a2ffdSstephen hemminger if (ifp->scope == IFA_LINK && 1259502a2ffdSstephen hemminger !(ifp->flags & banned_flags)) { 12601da177e4SLinus Torvalds ipv6_addr_copy(addr, &ifp->addr); 12611da177e4SLinus Torvalds err = 0; 12621da177e4SLinus Torvalds break; 12631da177e4SLinus Torvalds } 12641da177e4SLinus Torvalds } 12651da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 12661da177e4SLinus Torvalds } 12678814c4b5SYOSHIFUJI Hideaki rcu_read_unlock(); 12681da177e4SLinus Torvalds return err; 12691da177e4SLinus Torvalds } 12701da177e4SLinus Torvalds 12711da177e4SLinus Torvalds static int ipv6_count_addresses(struct inet6_dev *idev) 12721da177e4SLinus Torvalds { 12731da177e4SLinus Torvalds int cnt = 0; 12741da177e4SLinus Torvalds struct inet6_ifaddr *ifp; 12751da177e4SLinus Torvalds 12761da177e4SLinus Torvalds read_lock_bh(&idev->lock); 1277502a2ffdSstephen hemminger list_for_each_entry(ifp, &idev->addr_list, if_list) 12781da177e4SLinus Torvalds cnt++; 12791da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 12801da177e4SLinus Torvalds return cnt; 12811da177e4SLinus Torvalds } 12821da177e4SLinus Torvalds 1283bfeade08SDaniel Lezcano int ipv6_chk_addr(struct net *net, struct in6_addr *addr, 1284bfeade08SDaniel Lezcano struct net_device *dev, int strict) 12851da177e4SLinus Torvalds { 1286eedf042aSStephen Hemminger struct inet6_ifaddr *ifp; 1287c2e21293Sstephen hemminger struct hlist_node *node; 12883a88a81dSstephen hemminger unsigned int hash = ipv6_addr_hash(addr); 12891da177e4SLinus Torvalds 12905c578aedSstephen hemminger rcu_read_lock_bh(); 12915c578aedSstephen hemminger hlist_for_each_entry_rcu(ifp, node, &inet6_addr_lst[hash], addr_lst) { 1292878628fbSYOSHIFUJI Hideaki if (!net_eq(dev_net(ifp->idev->dev), net)) 1293bfeade08SDaniel Lezcano continue; 12941da177e4SLinus Torvalds if (ipv6_addr_equal(&ifp->addr, addr) && 1295eedf042aSStephen Hemminger !(ifp->flags&IFA_F_TENTATIVE) && 1296eedf042aSStephen Hemminger (dev == NULL || ifp->idev->dev == dev || 1297eedf042aSStephen Hemminger !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) { 12985c578aedSstephen hemminger rcu_read_unlock_bh(); 1299eedf042aSStephen Hemminger return 1; 1300eedf042aSStephen Hemminger } 1301eedf042aSStephen Hemminger } 13025c578aedSstephen hemminger 1303eedf042aSStephen Hemminger rcu_read_unlock_bh(); 1304eedf042aSStephen Hemminger return 0; 13051da177e4SLinus Torvalds } 13067159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(ipv6_chk_addr); 13077159039aSYOSHIFUJI Hideaki 13083e81c6daSDavid S. Miller static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, 130906bfe655SDaniel Lezcano struct net_device *dev) 13101da177e4SLinus Torvalds { 13113e81c6daSDavid S. Miller unsigned int hash = ipv6_addr_hash(addr); 13121da177e4SLinus Torvalds struct inet6_ifaddr *ifp; 1313c2e21293Sstephen hemminger struct hlist_node *node; 13141da177e4SLinus Torvalds 1315c2e21293Sstephen hemminger hlist_for_each_entry(ifp, node, &inet6_addr_lst[hash], addr_lst) { 1316878628fbSYOSHIFUJI Hideaki if (!net_eq(dev_net(ifp->idev->dev), net)) 131706bfe655SDaniel Lezcano continue; 13181da177e4SLinus Torvalds if (ipv6_addr_equal(&ifp->addr, addr)) { 13191da177e4SLinus Torvalds if (dev == NULL || ifp->idev->dev == dev) 13203e81c6daSDavid S. Miller return true; 13211da177e4SLinus Torvalds } 13221da177e4SLinus Torvalds } 13233e81c6daSDavid S. Miller return false; 13241da177e4SLinus Torvalds } 13251da177e4SLinus Torvalds 132652eeeb84SYOSHIFUJI Hideaki int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev) 132752eeeb84SYOSHIFUJI Hideaki { 132852eeeb84SYOSHIFUJI Hideaki struct inet6_dev *idev; 132952eeeb84SYOSHIFUJI Hideaki struct inet6_ifaddr *ifa; 133052eeeb84SYOSHIFUJI Hideaki int onlink; 133152eeeb84SYOSHIFUJI Hideaki 133252eeeb84SYOSHIFUJI Hideaki onlink = 0; 133352eeeb84SYOSHIFUJI Hideaki rcu_read_lock(); 133452eeeb84SYOSHIFUJI Hideaki idev = __in6_dev_get(dev); 133552eeeb84SYOSHIFUJI Hideaki if (idev) { 133652eeeb84SYOSHIFUJI Hideaki read_lock_bh(&idev->lock); 1337502a2ffdSstephen hemminger list_for_each_entry(ifa, &idev->addr_list, if_list) { 133852eeeb84SYOSHIFUJI Hideaki onlink = ipv6_prefix_equal(addr, &ifa->addr, 133952eeeb84SYOSHIFUJI Hideaki ifa->prefix_len); 134052eeeb84SYOSHIFUJI Hideaki if (onlink) 134152eeeb84SYOSHIFUJI Hideaki break; 134252eeeb84SYOSHIFUJI Hideaki } 134352eeeb84SYOSHIFUJI Hideaki read_unlock_bh(&idev->lock); 134452eeeb84SYOSHIFUJI Hideaki } 134552eeeb84SYOSHIFUJI Hideaki rcu_read_unlock(); 134652eeeb84SYOSHIFUJI Hideaki return onlink; 134752eeeb84SYOSHIFUJI Hideaki } 134852eeeb84SYOSHIFUJI Hideaki 134952eeeb84SYOSHIFUJI Hideaki EXPORT_SYMBOL(ipv6_chk_prefix); 135052eeeb84SYOSHIFUJI Hideaki 13519acd9f3aSYOSHIFUJI Hideaki struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, 13521cab3da6SDaniel Lezcano struct net_device *dev, int strict) 13531da177e4SLinus Torvalds { 1354b79d1d54SDavid S. Miller struct inet6_ifaddr *ifp, *result = NULL; 13553a88a81dSstephen hemminger unsigned int hash = ipv6_addr_hash(addr); 1356b79d1d54SDavid S. Miller struct hlist_node *node; 13571da177e4SLinus Torvalds 13585c578aedSstephen hemminger rcu_read_lock_bh(); 13594f70eccaSEric Dumazet hlist_for_each_entry_rcu_bh(ifp, node, &inet6_addr_lst[hash], addr_lst) { 1360878628fbSYOSHIFUJI Hideaki if (!net_eq(dev_net(ifp->idev->dev), net)) 13611cab3da6SDaniel Lezcano continue; 13621da177e4SLinus Torvalds if (ipv6_addr_equal(&ifp->addr, addr)) { 13631da177e4SLinus Torvalds if (dev == NULL || ifp->idev->dev == dev || 13641da177e4SLinus Torvalds !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { 1365b79d1d54SDavid S. Miller result = ifp; 13661da177e4SLinus Torvalds in6_ifa_hold(ifp); 13671da177e4SLinus Torvalds break; 13681da177e4SLinus Torvalds } 13691da177e4SLinus Torvalds } 13701da177e4SLinus Torvalds } 13715c578aedSstephen hemminger rcu_read_unlock_bh(); 13721da177e4SLinus Torvalds 1373b79d1d54SDavid S. Miller return result; 13741da177e4SLinus Torvalds } 13751da177e4SLinus Torvalds 13761da177e4SLinus Torvalds /* Gets referenced address, destroys ifaddr */ 13771da177e4SLinus Torvalds 1378cc411d0bSBrian Haley static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) 13791da177e4SLinus Torvalds { 13801da177e4SLinus Torvalds if (ifp->flags&IFA_F_PERMANENT) { 13811da177e4SLinus Torvalds spin_lock_bh(&ifp->lock); 13821da177e4SLinus Torvalds addrconf_del_timer(ifp); 13831da177e4SLinus Torvalds ifp->flags |= IFA_F_TENTATIVE; 1384cc411d0bSBrian Haley if (dad_failed) 1385cc411d0bSBrian Haley ifp->flags |= IFA_F_DADFAILED; 13861da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 1387e2577a06SHerbert Xu if (dad_failed) 1388e2577a06SHerbert Xu ipv6_ifa_notify(0, ifp); 13891da177e4SLinus Torvalds in6_ifa_put(ifp); 13901da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 13911da177e4SLinus Torvalds } else if (ifp->flags&IFA_F_TEMPORARY) { 13921da177e4SLinus Torvalds struct inet6_ifaddr *ifpub; 13931da177e4SLinus Torvalds spin_lock_bh(&ifp->lock); 13941da177e4SLinus Torvalds ifpub = ifp->ifpub; 13951da177e4SLinus Torvalds if (ifpub) { 13961da177e4SLinus Torvalds in6_ifa_hold(ifpub); 13971da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 13981da177e4SLinus Torvalds ipv6_create_tempaddr(ifpub, ifp); 13991da177e4SLinus Torvalds in6_ifa_put(ifpub); 14001da177e4SLinus Torvalds } else { 14011da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 14021da177e4SLinus Torvalds } 14031da177e4SLinus Torvalds ipv6_del_addr(ifp); 14041da177e4SLinus Torvalds #endif 14051da177e4SLinus Torvalds } else 14061da177e4SLinus Torvalds ipv6_del_addr(ifp); 14071da177e4SLinus Torvalds } 14081da177e4SLinus Torvalds 1409f2344a13SHerbert Xu static int addrconf_dad_end(struct inet6_ifaddr *ifp) 1410f2344a13SHerbert Xu { 1411f2344a13SHerbert Xu int err = -ENOENT; 1412f2344a13SHerbert Xu 1413f2344a13SHerbert Xu spin_lock(&ifp->state_lock); 1414f2344a13SHerbert Xu if (ifp->state == INET6_IFADDR_STATE_DAD) { 1415f2344a13SHerbert Xu ifp->state = INET6_IFADDR_STATE_POSTDAD; 1416f2344a13SHerbert Xu err = 0; 1417f2344a13SHerbert Xu } 1418f2344a13SHerbert Xu spin_unlock(&ifp->state_lock); 1419f2344a13SHerbert Xu 1420f2344a13SHerbert Xu return err; 1421f2344a13SHerbert Xu } 1422f2344a13SHerbert Xu 14233c21edbdSYOSHIFUJI Hideaki void addrconf_dad_failure(struct inet6_ifaddr *ifp) 14243c21edbdSYOSHIFUJI Hideaki { 14251b34be74SYOSHIFUJI Hideaki struct inet6_dev *idev = ifp->idev; 14269bdd8d40SBrian Haley 1427f2344a13SHerbert Xu if (addrconf_dad_end(ifp)) 1428f2344a13SHerbert Xu return; 1429f2344a13SHerbert Xu 14309bdd8d40SBrian Haley if (net_ratelimit()) 14310522fea6SJens Rosenboom printk(KERN_INFO "%s: IPv6 duplicate address %pI6c detected!\n", 14320522fea6SJens Rosenboom ifp->idev->dev->name, &ifp->addr); 14339bdd8d40SBrian Haley 14341b34be74SYOSHIFUJI Hideaki if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) { 14351b34be74SYOSHIFUJI Hideaki struct in6_addr addr; 14361b34be74SYOSHIFUJI Hideaki 14371b34be74SYOSHIFUJI Hideaki addr.s6_addr32[0] = htonl(0xfe800000); 14381b34be74SYOSHIFUJI Hideaki addr.s6_addr32[1] = 0; 14391b34be74SYOSHIFUJI Hideaki 14401b34be74SYOSHIFUJI Hideaki if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && 14411b34be74SYOSHIFUJI Hideaki ipv6_addr_equal(&ifp->addr, &addr)) { 14421b34be74SYOSHIFUJI Hideaki /* DAD failed for link-local based on MAC address */ 14431b34be74SYOSHIFUJI Hideaki idev->cnf.disable_ipv6 = 1; 14449bdd8d40SBrian Haley 14459bdd8d40SBrian Haley printk(KERN_INFO "%s: IPv6 being disabled!\n", 14469bdd8d40SBrian Haley ifp->idev->dev->name); 14471b34be74SYOSHIFUJI Hideaki } 14481b34be74SYOSHIFUJI Hideaki } 14491b34be74SYOSHIFUJI Hideaki 1450cc411d0bSBrian Haley addrconf_dad_stop(ifp, 1); 14513c21edbdSYOSHIFUJI Hideaki } 14521da177e4SLinus Torvalds 14531da177e4SLinus Torvalds /* Join to solicited addr multicast group. */ 14541da177e4SLinus Torvalds 14551da177e4SLinus Torvalds void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) 14561da177e4SLinus Torvalds { 14571da177e4SLinus Torvalds struct in6_addr maddr; 14581da177e4SLinus Torvalds 14591da177e4SLinus Torvalds if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) 14601da177e4SLinus Torvalds return; 14611da177e4SLinus Torvalds 14621da177e4SLinus Torvalds addrconf_addr_solict_mult(addr, &maddr); 14631da177e4SLinus Torvalds ipv6_dev_mc_inc(dev, &maddr); 14641da177e4SLinus Torvalds } 14651da177e4SLinus Torvalds 14661da177e4SLinus Torvalds void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) 14671da177e4SLinus Torvalds { 14681da177e4SLinus Torvalds struct in6_addr maddr; 14691da177e4SLinus Torvalds 14701da177e4SLinus Torvalds if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) 14711da177e4SLinus Torvalds return; 14721da177e4SLinus Torvalds 14731da177e4SLinus Torvalds addrconf_addr_solict_mult(addr, &maddr); 14741da177e4SLinus Torvalds __ipv6_dev_mc_dec(idev, &maddr); 14751da177e4SLinus Torvalds } 14761da177e4SLinus Torvalds 147720380731SArnaldo Carvalho de Melo static void addrconf_join_anycast(struct inet6_ifaddr *ifp) 14781da177e4SLinus Torvalds { 14791da177e4SLinus Torvalds struct in6_addr addr; 14801da177e4SLinus Torvalds ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); 14811da177e4SLinus Torvalds if (ipv6_addr_any(&addr)) 14821da177e4SLinus Torvalds return; 14831da177e4SLinus Torvalds ipv6_dev_ac_inc(ifp->idev->dev, &addr); 14841da177e4SLinus Torvalds } 14851da177e4SLinus Torvalds 148620380731SArnaldo Carvalho de Melo static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) 14871da177e4SLinus Torvalds { 14881da177e4SLinus Torvalds struct in6_addr addr; 14891da177e4SLinus Torvalds ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); 14901da177e4SLinus Torvalds if (ipv6_addr_any(&addr)) 14911da177e4SLinus Torvalds return; 14921da177e4SLinus Torvalds __ipv6_dev_ac_dec(ifp->idev, &addr); 14931da177e4SLinus Torvalds } 14941da177e4SLinus Torvalds 1495073a8e0eSYOSHIFUJI Hideaki static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) 14961da177e4SLinus Torvalds { 14971da177e4SLinus Torvalds if (dev->addr_len != ETH_ALEN) 14981da177e4SLinus Torvalds return -1; 14991da177e4SLinus Torvalds memcpy(eui, dev->dev_addr, 3); 15001da177e4SLinus Torvalds memcpy(eui + 5, dev->dev_addr + 3, 3); 15011da177e4SLinus Torvalds 15021da177e4SLinus Torvalds /* 15031da177e4SLinus Torvalds * The zSeries OSA network cards can be shared among various 15041da177e4SLinus Torvalds * OS instances, but the OSA cards have only one MAC address. 15051da177e4SLinus Torvalds * This leads to duplicate address conflicts in conjunction 15061da177e4SLinus Torvalds * with IPv6 if more than one instance uses the same card. 15071da177e4SLinus Torvalds * 15081da177e4SLinus Torvalds * The driver for these cards can deliver a unique 16-bit 15091da177e4SLinus Torvalds * identifier for each instance sharing the same card. It is 15101da177e4SLinus Torvalds * placed instead of 0xFFFE in the interface identifier. The 15111da177e4SLinus Torvalds * "u" bit of the interface identifier is not inverted in this 15121da177e4SLinus Torvalds * case. Hence the resulting interface identifier has local 15131da177e4SLinus Torvalds * scope according to RFC2373. 15141da177e4SLinus Torvalds */ 15151da177e4SLinus Torvalds if (dev->dev_id) { 15161da177e4SLinus Torvalds eui[3] = (dev->dev_id >> 8) & 0xFF; 15171da177e4SLinus Torvalds eui[4] = dev->dev_id & 0xFF; 15181da177e4SLinus Torvalds } else { 15191da177e4SLinus Torvalds eui[3] = 0xFF; 15201da177e4SLinus Torvalds eui[4] = 0xFE; 15211da177e4SLinus Torvalds eui[0] ^= 2; 15221da177e4SLinus Torvalds } 15231da177e4SLinus Torvalds return 0; 1524073a8e0eSYOSHIFUJI Hideaki } 1525073a8e0eSYOSHIFUJI Hideaki 1526073a8e0eSYOSHIFUJI Hideaki static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) 1527073a8e0eSYOSHIFUJI Hideaki { 15281da177e4SLinus Torvalds /* XXX: inherit EUI-64 from other interface -- yoshfuji */ 15291da177e4SLinus Torvalds if (dev->addr_len != ARCNET_ALEN) 15301da177e4SLinus Torvalds return -1; 15311da177e4SLinus Torvalds memset(eui, 0, 7); 15321da177e4SLinus Torvalds eui[7] = *(u8*)dev->dev_addr; 15331da177e4SLinus Torvalds return 0; 1534073a8e0eSYOSHIFUJI Hideaki } 1535073a8e0eSYOSHIFUJI Hideaki 1536073a8e0eSYOSHIFUJI Hideaki static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) 1537073a8e0eSYOSHIFUJI Hideaki { 15381da177e4SLinus Torvalds if (dev->addr_len != INFINIBAND_ALEN) 15391da177e4SLinus Torvalds return -1; 15401da177e4SLinus Torvalds memcpy(eui, dev->dev_addr + 12, 8); 15411da177e4SLinus Torvalds eui[0] |= 2; 15421da177e4SLinus Torvalds return 0; 15431da177e4SLinus Torvalds } 1544073a8e0eSYOSHIFUJI Hideaki 1545dfd982baSYOSHIFUJI Hideaki int __ipv6_isatap_ifid(u8 *eui, __be32 addr) 1546dfd982baSYOSHIFUJI Hideaki { 15479af28511SSascha Hlusiak if (addr == 0) 15489af28511SSascha Hlusiak return -1; 1549dfd982baSYOSHIFUJI Hideaki eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || 1550dfd982baSYOSHIFUJI Hideaki ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || 1551dfd982baSYOSHIFUJI Hideaki ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || 1552dfd982baSYOSHIFUJI Hideaki ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || 1553dfd982baSYOSHIFUJI Hideaki ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || 1554dfd982baSYOSHIFUJI Hideaki ipv4_is_lbcast(addr)) ? 0x00 : 0x02; 1555dfd982baSYOSHIFUJI Hideaki eui[1] = 0; 1556dfd982baSYOSHIFUJI Hideaki eui[2] = 0x5E; 1557dfd982baSYOSHIFUJI Hideaki eui[3] = 0xFE; 1558dfd982baSYOSHIFUJI Hideaki memcpy(eui + 4, &addr, 4); 1559dfd982baSYOSHIFUJI Hideaki return 0; 1560dfd982baSYOSHIFUJI Hideaki } 1561dfd982baSYOSHIFUJI Hideaki EXPORT_SYMBOL(__ipv6_isatap_ifid); 1562dfd982baSYOSHIFUJI Hideaki 1563dfd982baSYOSHIFUJI Hideaki static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) 1564dfd982baSYOSHIFUJI Hideaki { 1565dfd982baSYOSHIFUJI Hideaki if (dev->priv_flags & IFF_ISATAP) 1566dfd982baSYOSHIFUJI Hideaki return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); 1567dfd982baSYOSHIFUJI Hideaki return -1; 1568dfd982baSYOSHIFUJI Hideaki } 1569dfd982baSYOSHIFUJI Hideaki 1570073a8e0eSYOSHIFUJI Hideaki static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) 1571073a8e0eSYOSHIFUJI Hideaki { 1572073a8e0eSYOSHIFUJI Hideaki switch (dev->type) { 1573073a8e0eSYOSHIFUJI Hideaki case ARPHRD_ETHER: 1574073a8e0eSYOSHIFUJI Hideaki case ARPHRD_FDDI: 1575073a8e0eSYOSHIFUJI Hideaki case ARPHRD_IEEE802_TR: 1576073a8e0eSYOSHIFUJI Hideaki return addrconf_ifid_eui48(eui, dev); 1577073a8e0eSYOSHIFUJI Hideaki case ARPHRD_ARCNET: 1578073a8e0eSYOSHIFUJI Hideaki return addrconf_ifid_arcnet(eui, dev); 1579073a8e0eSYOSHIFUJI Hideaki case ARPHRD_INFINIBAND: 1580073a8e0eSYOSHIFUJI Hideaki return addrconf_ifid_infiniband(eui, dev); 1581c7dc89c0SFred L. Templin case ARPHRD_SIT: 1582dfd982baSYOSHIFUJI Hideaki return addrconf_ifid_sit(eui, dev); 1583073a8e0eSYOSHIFUJI Hideaki } 15841da177e4SLinus Torvalds return -1; 15851da177e4SLinus Torvalds } 15861da177e4SLinus Torvalds 15871da177e4SLinus Torvalds static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) 15881da177e4SLinus Torvalds { 15891da177e4SLinus Torvalds int err = -1; 15901da177e4SLinus Torvalds struct inet6_ifaddr *ifp; 15911da177e4SLinus Torvalds 15921da177e4SLinus Torvalds read_lock_bh(&idev->lock); 1593502a2ffdSstephen hemminger list_for_each_entry(ifp, &idev->addr_list, if_list) { 15941da177e4SLinus Torvalds if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { 15951da177e4SLinus Torvalds memcpy(eui, ifp->addr.s6_addr+8, 8); 15961da177e4SLinus Torvalds err = 0; 15971da177e4SLinus Torvalds break; 15981da177e4SLinus Torvalds } 15991da177e4SLinus Torvalds } 16001da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 16011da177e4SLinus Torvalds return err; 16021da177e4SLinus Torvalds } 16031da177e4SLinus Torvalds 16041da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 16051da177e4SLinus Torvalds /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ 16061da177e4SLinus Torvalds static int __ipv6_regen_rndid(struct inet6_dev *idev) 16071da177e4SLinus Torvalds { 16081da177e4SLinus Torvalds regen: 1609955189efSYOSHIFUJI Hideaki get_random_bytes(idev->rndid, sizeof(idev->rndid)); 16101da177e4SLinus Torvalds idev->rndid[0] &= ~0x02; 16111da177e4SLinus Torvalds 16121da177e4SLinus Torvalds /* 16131da177e4SLinus Torvalds * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: 16141da177e4SLinus Torvalds * check if generated address is not inappropriate 16151da177e4SLinus Torvalds * 16161da177e4SLinus Torvalds * - Reserved subnet anycast (RFC 2526) 16171da177e4SLinus Torvalds * 11111101 11....11 1xxxxxxx 1618c7dc89c0SFred L. Templin * - ISATAP (RFC4214) 6.1 16191da177e4SLinus Torvalds * 00-00-5E-FE-xx-xx-xx-xx 16201da177e4SLinus Torvalds * - value 0 16211da177e4SLinus Torvalds * - XXX: already assigned to an address on the device 16221da177e4SLinus Torvalds */ 16231da177e4SLinus Torvalds if (idev->rndid[0] == 0xfd && 16241da177e4SLinus Torvalds (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && 16251da177e4SLinus Torvalds (idev->rndid[7]&0x80)) 16261da177e4SLinus Torvalds goto regen; 16271da177e4SLinus Torvalds if ((idev->rndid[0]|idev->rndid[1]) == 0) { 16281da177e4SLinus Torvalds if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) 16291da177e4SLinus Torvalds goto regen; 16301da177e4SLinus Torvalds if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) 16311da177e4SLinus Torvalds goto regen; 16321da177e4SLinus Torvalds } 16331da177e4SLinus Torvalds 16341da177e4SLinus Torvalds return 0; 16351da177e4SLinus Torvalds } 16361da177e4SLinus Torvalds 16371da177e4SLinus Torvalds static void ipv6_regen_rndid(unsigned long data) 16381da177e4SLinus Torvalds { 16391da177e4SLinus Torvalds struct inet6_dev *idev = (struct inet6_dev *) data; 16401da177e4SLinus Torvalds unsigned long expires; 16411da177e4SLinus Torvalds 16428814c4b5SYOSHIFUJI Hideaki rcu_read_lock_bh(); 16431da177e4SLinus Torvalds write_lock_bh(&idev->lock); 16441da177e4SLinus Torvalds 16451da177e4SLinus Torvalds if (idev->dead) 16461da177e4SLinus Torvalds goto out; 16471da177e4SLinus Torvalds 16481da177e4SLinus Torvalds if (__ipv6_regen_rndid(idev) < 0) 16491da177e4SLinus Torvalds goto out; 16501da177e4SLinus Torvalds 16511da177e4SLinus Torvalds expires = jiffies + 16521da177e4SLinus Torvalds idev->cnf.temp_prefered_lft * HZ - 16531da177e4SLinus Torvalds idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; 16541da177e4SLinus Torvalds if (time_before(expires, jiffies)) { 16551da177e4SLinus Torvalds printk(KERN_WARNING 16561da177e4SLinus Torvalds "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", 16571da177e4SLinus Torvalds idev->dev->name); 16581da177e4SLinus Torvalds goto out; 16591da177e4SLinus Torvalds } 16601da177e4SLinus Torvalds 16611da177e4SLinus Torvalds if (!mod_timer(&idev->regen_timer, expires)) 16621da177e4SLinus Torvalds in6_dev_hold(idev); 16631da177e4SLinus Torvalds 16641da177e4SLinus Torvalds out: 16651da177e4SLinus Torvalds write_unlock_bh(&idev->lock); 16668814c4b5SYOSHIFUJI Hideaki rcu_read_unlock_bh(); 16671da177e4SLinus Torvalds in6_dev_put(idev); 16681da177e4SLinus Torvalds } 16691da177e4SLinus Torvalds 16701da177e4SLinus Torvalds static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { 16711da177e4SLinus Torvalds int ret = 0; 16721da177e4SLinus Torvalds 16731da177e4SLinus Torvalds if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) 16741da177e4SLinus Torvalds ret = __ipv6_regen_rndid(idev); 16751da177e4SLinus Torvalds return ret; 16761da177e4SLinus Torvalds } 16771da177e4SLinus Torvalds #endif 16781da177e4SLinus Torvalds 16791da177e4SLinus Torvalds /* 16801da177e4SLinus Torvalds * Add prefix route. 16811da177e4SLinus Torvalds */ 16821da177e4SLinus Torvalds 16831da177e4SLinus Torvalds static void 16841da177e4SLinus Torvalds addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, 1685e431b8c0SJamal Hadi Salim unsigned long expires, u32 flags) 16861da177e4SLinus Torvalds { 168786872cb5SThomas Graf struct fib6_config cfg = { 168886872cb5SThomas Graf .fc_table = RT6_TABLE_PREFIX, 168986872cb5SThomas Graf .fc_metric = IP6_RT_PRIO_ADDRCONF, 169086872cb5SThomas Graf .fc_ifindex = dev->ifindex, 169186872cb5SThomas Graf .fc_expires = expires, 169286872cb5SThomas Graf .fc_dst_len = plen, 169386872cb5SThomas Graf .fc_flags = RTF_UP | flags, 1694c346dca1SYOSHIFUJI Hideaki .fc_nlinfo.nl_net = dev_net(dev), 1695f410a1fbSStephen Hemminger .fc_protocol = RTPROT_KERNEL, 169686872cb5SThomas Graf }; 16971da177e4SLinus Torvalds 169886872cb5SThomas Graf ipv6_addr_copy(&cfg.fc_dst, pfx); 16991da177e4SLinus Torvalds 17001da177e4SLinus Torvalds /* Prevent useless cloning on PtP SIT. 17011da177e4SLinus Torvalds This thing is done here expecting that the whole 17021da177e4SLinus Torvalds class of non-broadcast devices need not cloning. 17031da177e4SLinus Torvalds */ 17040be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) 17051da177e4SLinus Torvalds if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) 170686872cb5SThomas Graf cfg.fc_flags |= RTF_NONEXTHOP; 17070be669bbSJoerg Roedel #endif 17081da177e4SLinus Torvalds 170986872cb5SThomas Graf ip6_route_add(&cfg); 17101da177e4SLinus Torvalds } 17111da177e4SLinus Torvalds 17121da177e4SLinus Torvalds /* Create "default" multicast route to the interface */ 17131da177e4SLinus Torvalds 17141da177e4SLinus Torvalds static void addrconf_add_mroute(struct net_device *dev) 17151da177e4SLinus Torvalds { 171686872cb5SThomas Graf struct fib6_config cfg = { 171786872cb5SThomas Graf .fc_table = RT6_TABLE_LOCAL, 171886872cb5SThomas Graf .fc_metric = IP6_RT_PRIO_ADDRCONF, 171986872cb5SThomas Graf .fc_ifindex = dev->ifindex, 172086872cb5SThomas Graf .fc_dst_len = 8, 172186872cb5SThomas Graf .fc_flags = RTF_UP, 1722c346dca1SYOSHIFUJI Hideaki .fc_nlinfo.nl_net = dev_net(dev), 172386872cb5SThomas Graf }; 17241da177e4SLinus Torvalds 172586872cb5SThomas Graf ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); 172686872cb5SThomas Graf 172786872cb5SThomas Graf ip6_route_add(&cfg); 17281da177e4SLinus Torvalds } 17291da177e4SLinus Torvalds 17300be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) 17311da177e4SLinus Torvalds static void sit_route_add(struct net_device *dev) 17321da177e4SLinus Torvalds { 173386872cb5SThomas Graf struct fib6_config cfg = { 173486872cb5SThomas Graf .fc_table = RT6_TABLE_MAIN, 173586872cb5SThomas Graf .fc_metric = IP6_RT_PRIO_ADDRCONF, 173686872cb5SThomas Graf .fc_ifindex = dev->ifindex, 173786872cb5SThomas Graf .fc_dst_len = 96, 173886872cb5SThomas Graf .fc_flags = RTF_UP | RTF_NONEXTHOP, 1739c346dca1SYOSHIFUJI Hideaki .fc_nlinfo.nl_net = dev_net(dev), 174086872cb5SThomas Graf }; 17411da177e4SLinus Torvalds 17421da177e4SLinus Torvalds /* prefix length - 96 bits "::d.d.d.d" */ 174386872cb5SThomas Graf ip6_route_add(&cfg); 17441da177e4SLinus Torvalds } 17450be669bbSJoerg Roedel #endif 17461da177e4SLinus Torvalds 17471da177e4SLinus Torvalds static void addrconf_add_lroute(struct net_device *dev) 17481da177e4SLinus Torvalds { 17491da177e4SLinus Torvalds struct in6_addr addr; 17501da177e4SLinus Torvalds 17511da177e4SLinus Torvalds ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); 17521da177e4SLinus Torvalds addrconf_prefix_route(&addr, 64, dev, 0, 0); 17531da177e4SLinus Torvalds } 17541da177e4SLinus Torvalds 17551da177e4SLinus Torvalds static struct inet6_dev *addrconf_add_dev(struct net_device *dev) 17561da177e4SLinus Torvalds { 17571da177e4SLinus Torvalds struct inet6_dev *idev; 17581da177e4SLinus Torvalds 17591da177e4SLinus Torvalds ASSERT_RTNL(); 17601da177e4SLinus Torvalds 1761e21e8467SStephen Hemminger idev = ipv6_find_idev(dev); 1762e21e8467SStephen Hemminger if (!idev) 1763*64e724f6SBrian Haley return ERR_PTR(-ENOBUFS); 1764*64e724f6SBrian Haley 1765*64e724f6SBrian Haley if (idev->cnf.disable_ipv6) 1766*64e724f6SBrian Haley return ERR_PTR(-EACCES); 17671da177e4SLinus Torvalds 17681da177e4SLinus Torvalds /* Add default multicast route */ 17691da177e4SLinus Torvalds addrconf_add_mroute(dev); 17701da177e4SLinus Torvalds 17711da177e4SLinus Torvalds /* Add link local route */ 17721da177e4SLinus Torvalds addrconf_add_lroute(dev); 17731da177e4SLinus Torvalds return idev; 17741da177e4SLinus Torvalds } 17751da177e4SLinus Torvalds 17761da177e4SLinus Torvalds void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) 17771da177e4SLinus Torvalds { 17781da177e4SLinus Torvalds struct prefix_info *pinfo; 17791da177e4SLinus Torvalds __u32 valid_lft; 17801da177e4SLinus Torvalds __u32 prefered_lft; 17811da177e4SLinus Torvalds int addr_type; 17821da177e4SLinus Torvalds struct inet6_dev *in6_dev; 178356d417b1SBrian Haley struct net *net = dev_net(dev); 17841da177e4SLinus Torvalds 17851da177e4SLinus Torvalds pinfo = (struct prefix_info *) opt; 17861da177e4SLinus Torvalds 17871da177e4SLinus Torvalds if (len < sizeof(struct prefix_info)) { 17881da177e4SLinus Torvalds ADBG(("addrconf: prefix option too short\n")); 17891da177e4SLinus Torvalds return; 17901da177e4SLinus Torvalds } 17911da177e4SLinus Torvalds 17921da177e4SLinus Torvalds /* 17931da177e4SLinus Torvalds * Validation checks ([ADDRCONF], page 19) 17941da177e4SLinus Torvalds */ 17951da177e4SLinus Torvalds 17961da177e4SLinus Torvalds addr_type = ipv6_addr_type(&pinfo->prefix); 17971da177e4SLinus Torvalds 17981da177e4SLinus Torvalds if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) 17991da177e4SLinus Torvalds return; 18001da177e4SLinus Torvalds 18011da177e4SLinus Torvalds valid_lft = ntohl(pinfo->valid); 18021da177e4SLinus Torvalds prefered_lft = ntohl(pinfo->prefered); 18031da177e4SLinus Torvalds 18041da177e4SLinus Torvalds if (prefered_lft > valid_lft) { 18051da177e4SLinus Torvalds if (net_ratelimit()) 18061da177e4SLinus Torvalds printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); 18071da177e4SLinus Torvalds return; 18081da177e4SLinus Torvalds } 18091da177e4SLinus Torvalds 18101da177e4SLinus Torvalds in6_dev = in6_dev_get(dev); 18111da177e4SLinus Torvalds 18121da177e4SLinus Torvalds if (in6_dev == NULL) { 18131da177e4SLinus Torvalds if (net_ratelimit()) 18141da177e4SLinus Torvalds printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); 18151da177e4SLinus Torvalds return; 18161da177e4SLinus Torvalds } 18171da177e4SLinus Torvalds 18181da177e4SLinus Torvalds /* 18191da177e4SLinus Torvalds * Two things going on here: 18201da177e4SLinus Torvalds * 1) Add routes for on-link prefixes 18211da177e4SLinus Torvalds * 2) Configure prefixes with the auto flag set 18221da177e4SLinus Torvalds */ 18231da177e4SLinus Torvalds 18244bed72e4SYOSHIFUJI Hideaki if (pinfo->onlink) { 18254bed72e4SYOSHIFUJI Hideaki struct rt6_info *rt; 18264bed72e4SYOSHIFUJI Hideaki unsigned long rt_expires; 18274bed72e4SYOSHIFUJI Hideaki 18281da177e4SLinus Torvalds /* Avoid arithmetic overflow. Really, we could 18296f704992SYOSHIFUJI Hideaki * save rt_expires in seconds, likely valid_lft, 18306f704992SYOSHIFUJI Hideaki * but it would require division in fib gc, that it 18316f704992SYOSHIFUJI Hideaki * not good. 18321da177e4SLinus Torvalds */ 18334bed72e4SYOSHIFUJI Hideaki if (HZ > USER_HZ) 18344bed72e4SYOSHIFUJI Hideaki rt_expires = addrconf_timeout_fixup(valid_lft, HZ); 18354bed72e4SYOSHIFUJI Hideaki else 18364bed72e4SYOSHIFUJI Hideaki rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); 18373dd4bc68SYOSHIFUJI Hideaki 18384bed72e4SYOSHIFUJI Hideaki if (addrconf_finite_timeout(rt_expires)) 18394bed72e4SYOSHIFUJI Hideaki rt_expires *= HZ; 18401da177e4SLinus Torvalds 184156d417b1SBrian Haley rt = rt6_lookup(net, &pinfo->prefix, NULL, 18426fda7350SBenjamin Thery dev->ifindex, 1); 18431da177e4SLinus Torvalds 18442b5ead46SYOSHIFUJI Hideaki if (rt && addrconf_is_prefix_route(rt)) { 18456f704992SYOSHIFUJI Hideaki /* Autoconf prefix route */ 18461da177e4SLinus Torvalds if (valid_lft == 0) { 1847e0a1ad73SThomas Graf ip6_del_rt(rt); 18481da177e4SLinus Torvalds rt = NULL; 18494bed72e4SYOSHIFUJI Hideaki } else if (addrconf_finite_timeout(rt_expires)) { 18506f704992SYOSHIFUJI Hideaki /* not infinity */ 18513dd4bc68SYOSHIFUJI Hideaki rt->rt6i_expires = jiffies + rt_expires; 18526f704992SYOSHIFUJI Hideaki rt->rt6i_flags |= RTF_EXPIRES; 18536f704992SYOSHIFUJI Hideaki } else { 18546f704992SYOSHIFUJI Hideaki rt->rt6i_flags &= ~RTF_EXPIRES; 18556f704992SYOSHIFUJI Hideaki rt->rt6i_expires = 0; 18561da177e4SLinus Torvalds } 18571da177e4SLinus Torvalds } else if (valid_lft) { 18586f704992SYOSHIFUJI Hideaki clock_t expires = 0; 18594bed72e4SYOSHIFUJI Hideaki int flags = RTF_ADDRCONF | RTF_PREFIX_RT; 18604bed72e4SYOSHIFUJI Hideaki if (addrconf_finite_timeout(rt_expires)) { 18616f704992SYOSHIFUJI Hideaki /* not infinity */ 18626f704992SYOSHIFUJI Hideaki flags |= RTF_EXPIRES; 18636f704992SYOSHIFUJI Hideaki expires = jiffies_to_clock_t(rt_expires); 18646f704992SYOSHIFUJI Hideaki } 18651da177e4SLinus Torvalds addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, 18666f704992SYOSHIFUJI Hideaki dev, expires, flags); 18671da177e4SLinus Torvalds } 18681da177e4SLinus Torvalds if (rt) 18691da177e4SLinus Torvalds dst_release(&rt->u.dst); 18701da177e4SLinus Torvalds } 18711da177e4SLinus Torvalds 18721da177e4SLinus Torvalds /* Try to figure out our local address for this prefix */ 18731da177e4SLinus Torvalds 18741da177e4SLinus Torvalds if (pinfo->autoconf && in6_dev->cnf.autoconf) { 18751da177e4SLinus Torvalds struct inet6_ifaddr * ifp; 18761da177e4SLinus Torvalds struct in6_addr addr; 18771da177e4SLinus Torvalds int create = 0, update_lft = 0; 18781da177e4SLinus Torvalds 18791da177e4SLinus Torvalds if (pinfo->prefix_len == 64) { 18801da177e4SLinus Torvalds memcpy(&addr, &pinfo->prefix, 8); 18811da177e4SLinus Torvalds if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && 18821da177e4SLinus Torvalds ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { 18831da177e4SLinus Torvalds in6_dev_put(in6_dev); 18841da177e4SLinus Torvalds return; 18851da177e4SLinus Torvalds } 18861da177e4SLinus Torvalds goto ok; 18871da177e4SLinus Torvalds } 18881da177e4SLinus Torvalds if (net_ratelimit()) 18891da177e4SLinus Torvalds printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", 18901da177e4SLinus Torvalds pinfo->prefix_len); 18911da177e4SLinus Torvalds in6_dev_put(in6_dev); 18921da177e4SLinus Torvalds return; 18931da177e4SLinus Torvalds 18941da177e4SLinus Torvalds ok: 18951da177e4SLinus Torvalds 189653b7997fSYOSHIFUJI Hideaki ifp = ipv6_get_ifaddr(net, &addr, dev, 1); 18971da177e4SLinus Torvalds 18981da177e4SLinus Torvalds if (ifp == NULL && valid_lft) { 18991da177e4SLinus Torvalds int max_addresses = in6_dev->cnf.max_addresses; 190095c385b4SNeil Horman u32 addr_flags = 0; 190195c385b4SNeil Horman 190295c385b4SNeil Horman #ifdef CONFIG_IPV6_OPTIMISTIC_DAD 190395c385b4SNeil Horman if (in6_dev->cnf.optimistic_dad && 190453b7997fSYOSHIFUJI Hideaki !net->ipv6.devconf_all->forwarding) 190595c385b4SNeil Horman addr_flags = IFA_F_OPTIMISTIC; 190695c385b4SNeil Horman #endif 19071da177e4SLinus Torvalds 19081da177e4SLinus Torvalds /* Do not allow to create too much of autoconfigured 19091da177e4SLinus Torvalds * addresses; this would be too easy way to crash kernel. 19101da177e4SLinus Torvalds */ 19111da177e4SLinus Torvalds if (!max_addresses || 19121da177e4SLinus Torvalds ipv6_count_addresses(in6_dev) < max_addresses) 19131da177e4SLinus Torvalds ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, 191495c385b4SNeil Horman addr_type&IPV6_ADDR_SCOPE_MASK, 191595c385b4SNeil Horman addr_flags); 19161da177e4SLinus Torvalds 19171da177e4SLinus Torvalds if (!ifp || IS_ERR(ifp)) { 19181da177e4SLinus Torvalds in6_dev_put(in6_dev); 19191da177e4SLinus Torvalds return; 19201da177e4SLinus Torvalds } 19211da177e4SLinus Torvalds 19221da177e4SLinus Torvalds update_lft = create = 1; 19231da177e4SLinus Torvalds ifp->cstamp = jiffies; 19241da177e4SLinus Torvalds addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); 19251da177e4SLinus Torvalds } 19261da177e4SLinus Torvalds 19271da177e4SLinus Torvalds if (ifp) { 19281da177e4SLinus Torvalds int flags; 19291da177e4SLinus Torvalds unsigned long now; 19301da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 19311da177e4SLinus Torvalds struct inet6_ifaddr *ift; 19321da177e4SLinus Torvalds #endif 19331da177e4SLinus Torvalds u32 stored_lft; 19341da177e4SLinus Torvalds 19351da177e4SLinus Torvalds /* update lifetime (RFC2462 5.5.3 e) */ 19361da177e4SLinus Torvalds spin_lock(&ifp->lock); 19371da177e4SLinus Torvalds now = jiffies; 19381da177e4SLinus Torvalds if (ifp->valid_lft > (now - ifp->tstamp) / HZ) 19391da177e4SLinus Torvalds stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; 19401da177e4SLinus Torvalds else 19411da177e4SLinus Torvalds stored_lft = 0; 19421da177e4SLinus Torvalds if (!update_lft && stored_lft) { 19431da177e4SLinus Torvalds if (valid_lft > MIN_VALID_LIFETIME || 19441da177e4SLinus Torvalds valid_lft > stored_lft) 19451da177e4SLinus Torvalds update_lft = 1; 19461da177e4SLinus Torvalds else if (stored_lft <= MIN_VALID_LIFETIME) { 19471da177e4SLinus Torvalds /* valid_lft <= stored_lft is always true */ 1948a1ed0526SBrian Haley /* 1949a1ed0526SBrian Haley * RFC 4862 Section 5.5.3e: 1950a1ed0526SBrian Haley * "Note that the preferred lifetime of 1951a1ed0526SBrian Haley * the corresponding address is always 1952a1ed0526SBrian Haley * reset to the Preferred Lifetime in 1953a1ed0526SBrian Haley * the received Prefix Information 1954a1ed0526SBrian Haley * option, regardless of whether the 1955a1ed0526SBrian Haley * valid lifetime is also reset or 1956a1ed0526SBrian Haley * ignored." 1957a1ed0526SBrian Haley * 1958a1ed0526SBrian Haley * So if the preferred lifetime in 1959a1ed0526SBrian Haley * this advertisement is different 1960a1ed0526SBrian Haley * than what we have stored, but the 1961a1ed0526SBrian Haley * valid lifetime is invalid, just 1962a1ed0526SBrian Haley * reset prefered_lft. 1963a1ed0526SBrian Haley * 1964a1ed0526SBrian Haley * We must set the valid lifetime 1965a1ed0526SBrian Haley * to the stored lifetime since we'll 1966a1ed0526SBrian Haley * be updating the timestamp below, 1967a1ed0526SBrian Haley * else we'll set it back to the 1968a1ed0526SBrian Haley * minumum. 1969a1ed0526SBrian Haley */ 1970a1ed0526SBrian Haley if (prefered_lft != ifp->prefered_lft) { 1971a1ed0526SBrian Haley valid_lft = stored_lft; 1972a1ed0526SBrian Haley update_lft = 1; 1973a1ed0526SBrian Haley } 19741da177e4SLinus Torvalds } else { 19751da177e4SLinus Torvalds valid_lft = MIN_VALID_LIFETIME; 19761da177e4SLinus Torvalds if (valid_lft < prefered_lft) 19771da177e4SLinus Torvalds prefered_lft = valid_lft; 19781da177e4SLinus Torvalds update_lft = 1; 19791da177e4SLinus Torvalds } 19801da177e4SLinus Torvalds } 19811da177e4SLinus Torvalds 19821da177e4SLinus Torvalds if (update_lft) { 19831da177e4SLinus Torvalds ifp->valid_lft = valid_lft; 19841da177e4SLinus Torvalds ifp->prefered_lft = prefered_lft; 19851da177e4SLinus Torvalds ifp->tstamp = now; 19861da177e4SLinus Torvalds flags = ifp->flags; 19871da177e4SLinus Torvalds ifp->flags &= ~IFA_F_DEPRECATED; 19881da177e4SLinus Torvalds spin_unlock(&ifp->lock); 19891da177e4SLinus Torvalds 19901da177e4SLinus Torvalds if (!(flags&IFA_F_TENTATIVE)) 19911da177e4SLinus Torvalds ipv6_ifa_notify(0, ifp); 19921da177e4SLinus Torvalds } else 19931da177e4SLinus Torvalds spin_unlock(&ifp->lock); 19941da177e4SLinus Torvalds 19951da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 19961da177e4SLinus Torvalds read_lock_bh(&in6_dev->lock); 19971da177e4SLinus Torvalds /* update all temporary addresses in the list */ 1998372e6c8fSstephen hemminger list_for_each_entry(ift, &in6_dev->tempaddr_list, tmp_list) { 19991da177e4SLinus Torvalds /* 20001da177e4SLinus Torvalds * When adjusting the lifetimes of an existing 20011da177e4SLinus Torvalds * temporary address, only lower the lifetimes. 20021da177e4SLinus Torvalds * Implementations must not increase the 20031da177e4SLinus Torvalds * lifetimes of an existing temporary address 20041da177e4SLinus Torvalds * when processing a Prefix Information Option. 20051da177e4SLinus Torvalds */ 2006c6fbfac2SBenoit Boissinot if (ifp != ift->ifpub) 2007c6fbfac2SBenoit Boissinot continue; 2008c6fbfac2SBenoit Boissinot 20091da177e4SLinus Torvalds spin_lock(&ift->lock); 20101da177e4SLinus Torvalds flags = ift->flags; 20111da177e4SLinus Torvalds if (ift->valid_lft > valid_lft && 20121da177e4SLinus Torvalds ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) 20131da177e4SLinus Torvalds ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; 20141da177e4SLinus Torvalds if (ift->prefered_lft > prefered_lft && 20151da177e4SLinus Torvalds ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) 20161da177e4SLinus Torvalds ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; 20171da177e4SLinus Torvalds spin_unlock(&ift->lock); 20181da177e4SLinus Torvalds if (!(flags&IFA_F_TENTATIVE)) 20191da177e4SLinus Torvalds ipv6_ifa_notify(0, ift); 20201da177e4SLinus Torvalds } 20211da177e4SLinus Torvalds 20221da177e4SLinus Torvalds if (create && in6_dev->cnf.use_tempaddr > 0) { 20231da177e4SLinus Torvalds /* 20241da177e4SLinus Torvalds * When a new public address is created as described in [ADDRCONF], 20251da177e4SLinus Torvalds * also create a new temporary address. 20261da177e4SLinus Torvalds */ 20271da177e4SLinus Torvalds read_unlock_bh(&in6_dev->lock); 20281da177e4SLinus Torvalds ipv6_create_tempaddr(ifp, NULL); 20291da177e4SLinus Torvalds } else { 20301da177e4SLinus Torvalds read_unlock_bh(&in6_dev->lock); 20311da177e4SLinus Torvalds } 20321da177e4SLinus Torvalds #endif 20331da177e4SLinus Torvalds in6_ifa_put(ifp); 20341da177e4SLinus Torvalds addrconf_verify(0); 20351da177e4SLinus Torvalds } 20361da177e4SLinus Torvalds } 20371da177e4SLinus Torvalds inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); 20381da177e4SLinus Torvalds in6_dev_put(in6_dev); 20391da177e4SLinus Torvalds } 20401da177e4SLinus Torvalds 20411da177e4SLinus Torvalds /* 20421da177e4SLinus Torvalds * Set destination address. 20431da177e4SLinus Torvalds * Special case for SIT interfaces where we create a new "virtual" 20441da177e4SLinus Torvalds * device. 20451da177e4SLinus Torvalds */ 2046af284937SDaniel Lezcano int addrconf_set_dstaddr(struct net *net, void __user *arg) 20471da177e4SLinus Torvalds { 20481da177e4SLinus Torvalds struct in6_ifreq ireq; 20491da177e4SLinus Torvalds struct net_device *dev; 20501da177e4SLinus Torvalds int err = -EINVAL; 20511da177e4SLinus Torvalds 20521da177e4SLinus Torvalds rtnl_lock(); 20531da177e4SLinus Torvalds 20541da177e4SLinus Torvalds err = -EFAULT; 20551da177e4SLinus Torvalds if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) 20561da177e4SLinus Torvalds goto err_exit; 20571da177e4SLinus Torvalds 2058af284937SDaniel Lezcano dev = __dev_get_by_index(net, ireq.ifr6_ifindex); 20591da177e4SLinus Torvalds 20601da177e4SLinus Torvalds err = -ENODEV; 20611da177e4SLinus Torvalds if (dev == NULL) 20621da177e4SLinus Torvalds goto err_exit; 20631da177e4SLinus Torvalds 20640be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) 20651da177e4SLinus Torvalds if (dev->type == ARPHRD_SIT) { 20665bc3eb7eSStephen Hemminger const struct net_device_ops *ops = dev->netdev_ops; 20671da177e4SLinus Torvalds struct ifreq ifr; 20681da177e4SLinus Torvalds struct ip_tunnel_parm p; 20691da177e4SLinus Torvalds 20701da177e4SLinus Torvalds err = -EADDRNOTAVAIL; 20711da177e4SLinus Torvalds if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) 20721da177e4SLinus Torvalds goto err_exit; 20731da177e4SLinus Torvalds 20741da177e4SLinus Torvalds memset(&p, 0, sizeof(p)); 20751da177e4SLinus Torvalds p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; 20761da177e4SLinus Torvalds p.iph.saddr = 0; 20771da177e4SLinus Torvalds p.iph.version = 4; 20781da177e4SLinus Torvalds p.iph.ihl = 5; 20791da177e4SLinus Torvalds p.iph.protocol = IPPROTO_IPV6; 20801da177e4SLinus Torvalds p.iph.ttl = 64; 2081d20b3109SStephen Hemminger ifr.ifr_ifru.ifru_data = (__force void __user *)&p; 20821da177e4SLinus Torvalds 20835bc3eb7eSStephen Hemminger if (ops->ndo_do_ioctl) { 20845bc3eb7eSStephen Hemminger mm_segment_t oldfs = get_fs(); 20855bc3eb7eSStephen Hemminger 20865bc3eb7eSStephen Hemminger set_fs(KERNEL_DS); 20875bc3eb7eSStephen Hemminger err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); 20881da177e4SLinus Torvalds set_fs(oldfs); 20895bc3eb7eSStephen Hemminger } else 20905bc3eb7eSStephen Hemminger err = -EOPNOTSUPP; 20911da177e4SLinus Torvalds 20921da177e4SLinus Torvalds if (err == 0) { 20931da177e4SLinus Torvalds err = -ENOBUFS; 2094af284937SDaniel Lezcano dev = __dev_get_by_name(net, p.name); 2095af284937SDaniel Lezcano if (!dev) 20961da177e4SLinus Torvalds goto err_exit; 20971da177e4SLinus Torvalds err = dev_open(dev); 20981da177e4SLinus Torvalds } 20991da177e4SLinus Torvalds } 21000be669bbSJoerg Roedel #endif 21011da177e4SLinus Torvalds 21021da177e4SLinus Torvalds err_exit: 21031da177e4SLinus Torvalds rtnl_unlock(); 21041da177e4SLinus Torvalds return err; 21051da177e4SLinus Torvalds } 21061da177e4SLinus Torvalds 21071da177e4SLinus Torvalds /* 21081da177e4SLinus Torvalds * Manual configuration of address on an interface 21091da177e4SLinus Torvalds */ 2110af284937SDaniel Lezcano static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx, 211124ef0da7SThomas Graf unsigned int plen, __u8 ifa_flags, __u32 prefered_lft, 2112af284937SDaniel Lezcano __u32 valid_lft) 21131da177e4SLinus Torvalds { 21141da177e4SLinus Torvalds struct inet6_ifaddr *ifp; 21151da177e4SLinus Torvalds struct inet6_dev *idev; 21161da177e4SLinus Torvalds struct net_device *dev; 21171da177e4SLinus Torvalds int scope; 21186f704992SYOSHIFUJI Hideaki u32 flags; 21196f704992SYOSHIFUJI Hideaki clock_t expires; 21204bed72e4SYOSHIFUJI Hideaki unsigned long timeout; 21211da177e4SLinus Torvalds 21221da177e4SLinus Torvalds ASSERT_RTNL(); 21231da177e4SLinus Torvalds 212424ef0da7SThomas Graf if (plen > 128) 212524ef0da7SThomas Graf return -EINVAL; 212624ef0da7SThomas Graf 21270778769dSNoriaki TAKAMIYA /* check the lifetime */ 21280778769dSNoriaki TAKAMIYA if (!valid_lft || prefered_lft > valid_lft) 21290778769dSNoriaki TAKAMIYA return -EINVAL; 21300778769dSNoriaki TAKAMIYA 2131af284937SDaniel Lezcano dev = __dev_get_by_index(net, ifindex); 2132af284937SDaniel Lezcano if (!dev) 21331da177e4SLinus Torvalds return -ENODEV; 21341da177e4SLinus Torvalds 2135*64e724f6SBrian Haley idev = addrconf_add_dev(dev); 2136*64e724f6SBrian Haley if (IS_ERR(idev)) 2137*64e724f6SBrian Haley return PTR_ERR(idev); 21381da177e4SLinus Torvalds 21391da177e4SLinus Torvalds scope = ipv6_addr_scope(pfx); 21401da177e4SLinus Torvalds 21414bed72e4SYOSHIFUJI Hideaki timeout = addrconf_timeout_fixup(valid_lft, HZ); 21424bed72e4SYOSHIFUJI Hideaki if (addrconf_finite_timeout(timeout)) { 21434bed72e4SYOSHIFUJI Hideaki expires = jiffies_to_clock_t(timeout * HZ); 21444bed72e4SYOSHIFUJI Hideaki valid_lft = timeout; 21456f704992SYOSHIFUJI Hideaki flags = RTF_EXPIRES; 21464bed72e4SYOSHIFUJI Hideaki } else { 21474bed72e4SYOSHIFUJI Hideaki expires = 0; 21484bed72e4SYOSHIFUJI Hideaki flags = 0; 21494bed72e4SYOSHIFUJI Hideaki ifa_flags |= IFA_F_PERMANENT; 21506f704992SYOSHIFUJI Hideaki } 21510778769dSNoriaki TAKAMIYA 21524bed72e4SYOSHIFUJI Hideaki timeout = addrconf_timeout_fixup(prefered_lft, HZ); 21534bed72e4SYOSHIFUJI Hideaki if (addrconf_finite_timeout(timeout)) { 21544bed72e4SYOSHIFUJI Hideaki if (timeout == 0) 21550778769dSNoriaki TAKAMIYA ifa_flags |= IFA_F_DEPRECATED; 21564bed72e4SYOSHIFUJI Hideaki prefered_lft = timeout; 21574bed72e4SYOSHIFUJI Hideaki } 21580778769dSNoriaki TAKAMIYA 21590778769dSNoriaki TAKAMIYA ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); 21600778769dSNoriaki TAKAMIYA 21611da177e4SLinus Torvalds if (!IS_ERR(ifp)) { 216206aebfb7SHerbert Xu spin_lock_bh(&ifp->lock); 21630778769dSNoriaki TAKAMIYA ifp->valid_lft = valid_lft; 21640778769dSNoriaki TAKAMIYA ifp->prefered_lft = prefered_lft; 21650778769dSNoriaki TAKAMIYA ifp->tstamp = jiffies; 216606aebfb7SHerbert Xu spin_unlock_bh(&ifp->lock); 21670778769dSNoriaki TAKAMIYA 216846d48046SYOSHIFUJI Hideaki addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, 21696f704992SYOSHIFUJI Hideaki expires, flags); 217095c385b4SNeil Horman /* 217195c385b4SNeil Horman * Note that section 3.1 of RFC 4429 indicates 217295c385b4SNeil Horman * that the Optimistic flag should not be set for 217395c385b4SNeil Horman * manually configured addresses 217495c385b4SNeil Horman */ 21751da177e4SLinus Torvalds addrconf_dad_start(ifp, 0); 21761da177e4SLinus Torvalds in6_ifa_put(ifp); 21770778769dSNoriaki TAKAMIYA addrconf_verify(0); 21781da177e4SLinus Torvalds return 0; 21791da177e4SLinus Torvalds } 21801da177e4SLinus Torvalds 21811da177e4SLinus Torvalds return PTR_ERR(ifp); 21821da177e4SLinus Torvalds } 21831da177e4SLinus Torvalds 2184af284937SDaniel Lezcano static int inet6_addr_del(struct net *net, int ifindex, struct in6_addr *pfx, 218524ef0da7SThomas Graf unsigned int plen) 21861da177e4SLinus Torvalds { 21871da177e4SLinus Torvalds struct inet6_ifaddr *ifp; 21881da177e4SLinus Torvalds struct inet6_dev *idev; 21891da177e4SLinus Torvalds struct net_device *dev; 21901da177e4SLinus Torvalds 219124ef0da7SThomas Graf if (plen > 128) 219224ef0da7SThomas Graf return -EINVAL; 219324ef0da7SThomas Graf 2194af284937SDaniel Lezcano dev = __dev_get_by_index(net, ifindex); 2195af284937SDaniel Lezcano if (!dev) 21961da177e4SLinus Torvalds return -ENODEV; 21971da177e4SLinus Torvalds 21981da177e4SLinus Torvalds if ((idev = __in6_dev_get(dev)) == NULL) 21991da177e4SLinus Torvalds return -ENXIO; 22001da177e4SLinus Torvalds 22011da177e4SLinus Torvalds read_lock_bh(&idev->lock); 2202502a2ffdSstephen hemminger list_for_each_entry(ifp, &idev->addr_list, if_list) { 22031da177e4SLinus Torvalds if (ifp->prefix_len == plen && 22041da177e4SLinus Torvalds ipv6_addr_equal(pfx, &ifp->addr)) { 22051da177e4SLinus Torvalds in6_ifa_hold(ifp); 22061da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 22071da177e4SLinus Torvalds 22081da177e4SLinus Torvalds ipv6_del_addr(ifp); 22091da177e4SLinus Torvalds 22101da177e4SLinus Torvalds /* If the last address is deleted administratively, 22111da177e4SLinus Torvalds disable IPv6 on this interface. 22121da177e4SLinus Torvalds */ 2213502a2ffdSstephen hemminger if (list_empty(&idev->addr_list)) 22141da177e4SLinus Torvalds addrconf_ifdown(idev->dev, 1); 22151da177e4SLinus Torvalds return 0; 22161da177e4SLinus Torvalds } 22171da177e4SLinus Torvalds } 22181da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 22191da177e4SLinus Torvalds return -EADDRNOTAVAIL; 22201da177e4SLinus Torvalds } 22211da177e4SLinus Torvalds 22221da177e4SLinus Torvalds 2223af284937SDaniel Lezcano int addrconf_add_ifaddr(struct net *net, void __user *arg) 22241da177e4SLinus Torvalds { 22251da177e4SLinus Torvalds struct in6_ifreq ireq; 22261da177e4SLinus Torvalds int err; 22271da177e4SLinus Torvalds 22281da177e4SLinus Torvalds if (!capable(CAP_NET_ADMIN)) 22291da177e4SLinus Torvalds return -EPERM; 22301da177e4SLinus Torvalds 22311da177e4SLinus Torvalds if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) 22321da177e4SLinus Torvalds return -EFAULT; 22331da177e4SLinus Torvalds 22341da177e4SLinus Torvalds rtnl_lock(); 2235af284937SDaniel Lezcano err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, 2236af284937SDaniel Lezcano ireq.ifr6_prefixlen, IFA_F_PERMANENT, 2237af284937SDaniel Lezcano INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); 22381da177e4SLinus Torvalds rtnl_unlock(); 22391da177e4SLinus Torvalds return err; 22401da177e4SLinus Torvalds } 22411da177e4SLinus Torvalds 2242af284937SDaniel Lezcano int addrconf_del_ifaddr(struct net *net, void __user *arg) 22431da177e4SLinus Torvalds { 22441da177e4SLinus Torvalds struct in6_ifreq ireq; 22451da177e4SLinus Torvalds int err; 22461da177e4SLinus Torvalds 22471da177e4SLinus Torvalds if (!capable(CAP_NET_ADMIN)) 22481da177e4SLinus Torvalds return -EPERM; 22491da177e4SLinus Torvalds 22501da177e4SLinus Torvalds if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) 22511da177e4SLinus Torvalds return -EFAULT; 22521da177e4SLinus Torvalds 22531da177e4SLinus Torvalds rtnl_lock(); 2254af284937SDaniel Lezcano err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, 2255af284937SDaniel Lezcano ireq.ifr6_prefixlen); 22561da177e4SLinus Torvalds rtnl_unlock(); 22571da177e4SLinus Torvalds return err; 22581da177e4SLinus Torvalds } 22591da177e4SLinus Torvalds 2260b5f348e5SIlpo Järvinen static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, 2261b5f348e5SIlpo Järvinen int plen, int scope) 2262b5f348e5SIlpo Järvinen { 2263b5f348e5SIlpo Järvinen struct inet6_ifaddr *ifp; 2264b5f348e5SIlpo Järvinen 2265b5f348e5SIlpo Järvinen ifp = ipv6_add_addr(idev, addr, plen, scope, IFA_F_PERMANENT); 2266b5f348e5SIlpo Järvinen if (!IS_ERR(ifp)) { 2267b5f348e5SIlpo Järvinen spin_lock_bh(&ifp->lock); 2268b5f348e5SIlpo Järvinen ifp->flags &= ~IFA_F_TENTATIVE; 2269b5f348e5SIlpo Järvinen spin_unlock_bh(&ifp->lock); 2270b5f348e5SIlpo Järvinen ipv6_ifa_notify(RTM_NEWADDR, ifp); 2271b5f348e5SIlpo Järvinen in6_ifa_put(ifp); 2272b5f348e5SIlpo Järvinen } 2273b5f348e5SIlpo Järvinen } 2274b5f348e5SIlpo Järvinen 22750be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) 22761da177e4SLinus Torvalds static void sit_add_v4_addrs(struct inet6_dev *idev) 22771da177e4SLinus Torvalds { 22781da177e4SLinus Torvalds struct in6_addr addr; 22791da177e4SLinus Torvalds struct net_device *dev; 2280c346dca1SYOSHIFUJI Hideaki struct net *net = dev_net(idev->dev); 22811da177e4SLinus Torvalds int scope; 22821da177e4SLinus Torvalds 22831da177e4SLinus Torvalds ASSERT_RTNL(); 22841da177e4SLinus Torvalds 22851da177e4SLinus Torvalds memset(&addr, 0, sizeof(struct in6_addr)); 22861da177e4SLinus Torvalds memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); 22871da177e4SLinus Torvalds 22881da177e4SLinus Torvalds if (idev->dev->flags&IFF_POINTOPOINT) { 22891da177e4SLinus Torvalds addr.s6_addr32[0] = htonl(0xfe800000); 22901da177e4SLinus Torvalds scope = IFA_LINK; 22911da177e4SLinus Torvalds } else { 22921da177e4SLinus Torvalds scope = IPV6_ADDR_COMPATv4; 22931da177e4SLinus Torvalds } 22941da177e4SLinus Torvalds 22951da177e4SLinus Torvalds if (addr.s6_addr32[3]) { 2296b5f348e5SIlpo Järvinen add_addr(idev, &addr, 128, scope); 22971da177e4SLinus Torvalds return; 22981da177e4SLinus Torvalds } 22991da177e4SLinus Torvalds 23006fda7350SBenjamin Thery for_each_netdev(net, dev) { 2301e5ed6399SHerbert Xu struct in_device * in_dev = __in_dev_get_rtnl(dev); 23021da177e4SLinus Torvalds if (in_dev && (dev->flags & IFF_UP)) { 23031da177e4SLinus Torvalds struct in_ifaddr * ifa; 23041da177e4SLinus Torvalds 23051da177e4SLinus Torvalds int flag = scope; 23061da177e4SLinus Torvalds 23071da177e4SLinus Torvalds for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { 23081da177e4SLinus Torvalds int plen; 23091da177e4SLinus Torvalds 23101da177e4SLinus Torvalds addr.s6_addr32[3] = ifa->ifa_local; 23111da177e4SLinus Torvalds 23121da177e4SLinus Torvalds if (ifa->ifa_scope == RT_SCOPE_LINK) 23131da177e4SLinus Torvalds continue; 23141da177e4SLinus Torvalds if (ifa->ifa_scope >= RT_SCOPE_HOST) { 23151da177e4SLinus Torvalds if (idev->dev->flags&IFF_POINTOPOINT) 23161da177e4SLinus Torvalds continue; 23171da177e4SLinus Torvalds flag |= IFA_HOST; 23181da177e4SLinus Torvalds } 23191da177e4SLinus Torvalds if (idev->dev->flags&IFF_POINTOPOINT) 23201da177e4SLinus Torvalds plen = 64; 23211da177e4SLinus Torvalds else 23221da177e4SLinus Torvalds plen = 96; 23231da177e4SLinus Torvalds 2324b5f348e5SIlpo Järvinen add_addr(idev, &addr, plen, flag); 23251da177e4SLinus Torvalds } 23261da177e4SLinus Torvalds } 23271da177e4SLinus Torvalds } 23281da177e4SLinus Torvalds } 23290be669bbSJoerg Roedel #endif 23301da177e4SLinus Torvalds 23311da177e4SLinus Torvalds static void init_loopback(struct net_device *dev) 23321da177e4SLinus Torvalds { 23331da177e4SLinus Torvalds struct inet6_dev *idev; 23341da177e4SLinus Torvalds 23351da177e4SLinus Torvalds /* ::1 */ 23361da177e4SLinus Torvalds 23371da177e4SLinus Torvalds ASSERT_RTNL(); 23381da177e4SLinus Torvalds 23391da177e4SLinus Torvalds if ((idev = ipv6_find_idev(dev)) == NULL) { 23401da177e4SLinus Torvalds printk(KERN_DEBUG "init loopback: add_dev failed\n"); 23411da177e4SLinus Torvalds return; 23421da177e4SLinus Torvalds } 23431da177e4SLinus Torvalds 2344b5f348e5SIlpo Järvinen add_addr(idev, &in6addr_loopback, 128, IFA_HOST); 23451da177e4SLinus Torvalds } 23461da177e4SLinus Torvalds 23471da177e4SLinus Torvalds static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) 23481da177e4SLinus Torvalds { 23491da177e4SLinus Torvalds struct inet6_ifaddr * ifp; 235095c385b4SNeil Horman u32 addr_flags = IFA_F_PERMANENT; 23511da177e4SLinus Torvalds 235295c385b4SNeil Horman #ifdef CONFIG_IPV6_OPTIMISTIC_DAD 235395c385b4SNeil Horman if (idev->cnf.optimistic_dad && 2354702beb87SDavid Miller !dev_net(idev->dev)->ipv6.devconf_all->forwarding) 235595c385b4SNeil Horman addr_flags |= IFA_F_OPTIMISTIC; 235695c385b4SNeil Horman #endif 235795c385b4SNeil Horman 235895c385b4SNeil Horman 235995c385b4SNeil Horman ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags); 23601da177e4SLinus Torvalds if (!IS_ERR(ifp)) { 236146d48046SYOSHIFUJI Hideaki addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); 23621da177e4SLinus Torvalds addrconf_dad_start(ifp, 0); 23631da177e4SLinus Torvalds in6_ifa_put(ifp); 23641da177e4SLinus Torvalds } 23651da177e4SLinus Torvalds } 23661da177e4SLinus Torvalds 23671da177e4SLinus Torvalds static void addrconf_dev_config(struct net_device *dev) 23681da177e4SLinus Torvalds { 23691da177e4SLinus Torvalds struct in6_addr addr; 23701da177e4SLinus Torvalds struct inet6_dev * idev; 23711da177e4SLinus Torvalds 23721da177e4SLinus Torvalds ASSERT_RTNL(); 23731da177e4SLinus Torvalds 237474235a25SHerbert Xu if ((dev->type != ARPHRD_ETHER) && 237574235a25SHerbert Xu (dev->type != ARPHRD_FDDI) && 237674235a25SHerbert Xu (dev->type != ARPHRD_IEEE802_TR) && 237774235a25SHerbert Xu (dev->type != ARPHRD_ARCNET) && 237874235a25SHerbert Xu (dev->type != ARPHRD_INFINIBAND)) { 237974235a25SHerbert Xu /* Alas, we support only Ethernet autoconfiguration. */ 238074235a25SHerbert Xu return; 238174235a25SHerbert Xu } 238274235a25SHerbert Xu 23831da177e4SLinus Torvalds idev = addrconf_add_dev(dev); 2384*64e724f6SBrian Haley if (IS_ERR(idev)) 23851da177e4SLinus Torvalds return; 23861da177e4SLinus Torvalds 23871da177e4SLinus Torvalds memset(&addr, 0, sizeof(struct in6_addr)); 23881da177e4SLinus Torvalds addr.s6_addr32[0] = htonl(0xFE800000); 23891da177e4SLinus Torvalds 23901da177e4SLinus Torvalds if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) 23911da177e4SLinus Torvalds addrconf_add_linklocal(idev, &addr); 23921da177e4SLinus Torvalds } 23931da177e4SLinus Torvalds 23940be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) 23951da177e4SLinus Torvalds static void addrconf_sit_config(struct net_device *dev) 23961da177e4SLinus Torvalds { 23971da177e4SLinus Torvalds struct inet6_dev *idev; 23981da177e4SLinus Torvalds 23991da177e4SLinus Torvalds ASSERT_RTNL(); 24001da177e4SLinus Torvalds 24011da177e4SLinus Torvalds /* 24021da177e4SLinus Torvalds * Configure the tunnel with one of our IPv4 24031da177e4SLinus Torvalds * addresses... we should configure all of 24041da177e4SLinus Torvalds * our v4 addrs in the tunnel 24051da177e4SLinus Torvalds */ 24061da177e4SLinus Torvalds 24071da177e4SLinus Torvalds if ((idev = ipv6_find_idev(dev)) == NULL) { 24081da177e4SLinus Torvalds printk(KERN_DEBUG "init sit: add_dev failed\n"); 24091da177e4SLinus Torvalds return; 24101da177e4SLinus Torvalds } 24111da177e4SLinus Torvalds 2412c7dc89c0SFred L. Templin if (dev->priv_flags & IFF_ISATAP) { 2413c7dc89c0SFred L. Templin struct in6_addr addr; 2414c7dc89c0SFred L. Templin 2415c7dc89c0SFred L. Templin ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); 2416c7dc89c0SFred L. Templin addrconf_prefix_route(&addr, 64, dev, 0, 0); 2417c7dc89c0SFred L. Templin if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) 2418c7dc89c0SFred L. Templin addrconf_add_linklocal(idev, &addr); 2419c7dc89c0SFred L. Templin return; 2420c7dc89c0SFred L. Templin } 2421c7dc89c0SFred L. Templin 24221da177e4SLinus Torvalds sit_add_v4_addrs(idev); 24231da177e4SLinus Torvalds 24241da177e4SLinus Torvalds if (dev->flags&IFF_POINTOPOINT) { 24251da177e4SLinus Torvalds addrconf_add_mroute(dev); 24261da177e4SLinus Torvalds addrconf_add_lroute(dev); 24271da177e4SLinus Torvalds } else 24281da177e4SLinus Torvalds sit_route_add(dev); 24291da177e4SLinus Torvalds } 24300be669bbSJoerg Roedel #endif 24311da177e4SLinus Torvalds 24321da177e4SLinus Torvalds static inline int 24331da177e4SLinus Torvalds ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) 24341da177e4SLinus Torvalds { 24351da177e4SLinus Torvalds struct in6_addr lladdr; 24361da177e4SLinus Torvalds 243795c385b4SNeil Horman if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { 24381da177e4SLinus Torvalds addrconf_add_linklocal(idev, &lladdr); 24391da177e4SLinus Torvalds return 0; 24401da177e4SLinus Torvalds } 24411da177e4SLinus Torvalds return -1; 24421da177e4SLinus Torvalds } 24431da177e4SLinus Torvalds 24441da177e4SLinus Torvalds static void ip6_tnl_add_linklocal(struct inet6_dev *idev) 24451da177e4SLinus Torvalds { 24461da177e4SLinus Torvalds struct net_device *link_dev; 2447c346dca1SYOSHIFUJI Hideaki struct net *net = dev_net(idev->dev); 24481da177e4SLinus Torvalds 24491da177e4SLinus Torvalds /* first try to inherit the link-local address from the link device */ 24501da177e4SLinus Torvalds if (idev->dev->iflink && 24516fda7350SBenjamin Thery (link_dev = __dev_get_by_index(net, idev->dev->iflink))) { 24521da177e4SLinus Torvalds if (!ipv6_inherit_linklocal(idev, link_dev)) 24531da177e4SLinus Torvalds return; 24541da177e4SLinus Torvalds } 24551da177e4SLinus Torvalds /* then try to inherit it from any device */ 24566fda7350SBenjamin Thery for_each_netdev(net, link_dev) { 24571da177e4SLinus Torvalds if (!ipv6_inherit_linklocal(idev, link_dev)) 24581da177e4SLinus Torvalds return; 24591da177e4SLinus Torvalds } 24601da177e4SLinus Torvalds printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); 24611da177e4SLinus Torvalds } 24621da177e4SLinus Torvalds 24631da177e4SLinus Torvalds /* 24641da177e4SLinus Torvalds * Autoconfigure tunnel with a link-local address so routing protocols, 24651da177e4SLinus Torvalds * DHCPv6, MLD etc. can be run over the virtual link 24661da177e4SLinus Torvalds */ 24671da177e4SLinus Torvalds 24681da177e4SLinus Torvalds static void addrconf_ip6_tnl_config(struct net_device *dev) 24691da177e4SLinus Torvalds { 24701da177e4SLinus Torvalds struct inet6_dev *idev; 24711da177e4SLinus Torvalds 24721da177e4SLinus Torvalds ASSERT_RTNL(); 24731da177e4SLinus Torvalds 2474e21e8467SStephen Hemminger idev = addrconf_add_dev(dev); 2475*64e724f6SBrian Haley if (IS_ERR(idev)) { 24761da177e4SLinus Torvalds printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); 24771da177e4SLinus Torvalds return; 24781da177e4SLinus Torvalds } 24791da177e4SLinus Torvalds ip6_tnl_add_linklocal(idev); 24801da177e4SLinus Torvalds } 24811da177e4SLinus Torvalds 24821da177e4SLinus Torvalds static int addrconf_notify(struct notifier_block *this, unsigned long event, 24831da177e4SLinus Torvalds void * data) 24841da177e4SLinus Torvalds { 24851da177e4SLinus Torvalds struct net_device *dev = (struct net_device *) data; 248674235a25SHerbert Xu struct inet6_dev *idev = __in6_dev_get(dev); 2487c5e33bddSYOSHIFUJI Hideaki int run_pending = 0; 2488b217d616SHerbert Xu int err; 24891da177e4SLinus Torvalds 24901da177e4SLinus Torvalds switch (event) { 249145ba9dd2SYOSHIFUJI Hideaki case NETDEV_REGISTER: 249274235a25SHerbert Xu if (!idev && dev->mtu >= IPV6_MIN_MTU) { 249345ba9dd2SYOSHIFUJI Hideaki idev = ipv6_add_dev(dev); 249445ba9dd2SYOSHIFUJI Hideaki if (!idev) 2495b217d616SHerbert Xu return notifier_from_errno(-ENOMEM); 249645ba9dd2SYOSHIFUJI Hideaki } 249745ba9dd2SYOSHIFUJI Hideaki break; 2498bcdd553fSStephen Hemminger 24991da177e4SLinus Torvalds case NETDEV_UP: 25003c21edbdSYOSHIFUJI Hideaki case NETDEV_CHANGE: 2501c2edacf8SJay Vosburgh if (dev->flags & IFF_SLAVE) 2502c2edacf8SJay Vosburgh break; 2503c2edacf8SJay Vosburgh 25043c21edbdSYOSHIFUJI Hideaki if (event == NETDEV_UP) { 2505f24e3d65SMitsuru Chinen if (!addrconf_qdisc_ok(dev)) { 25063c21edbdSYOSHIFUJI Hideaki /* device is not ready yet. */ 25073c21edbdSYOSHIFUJI Hideaki printk(KERN_INFO 25083c21edbdSYOSHIFUJI Hideaki "ADDRCONF(NETDEV_UP): %s: " 25093c21edbdSYOSHIFUJI Hideaki "link is not ready\n", 25103c21edbdSYOSHIFUJI Hideaki dev->name); 25113c21edbdSYOSHIFUJI Hideaki break; 25123c21edbdSYOSHIFUJI Hideaki } 251399081049SKristian Slavov 2514d31c7b8fSEvgeniy Polyakov if (!idev && dev->mtu >= IPV6_MIN_MTU) 2515d31c7b8fSEvgeniy Polyakov idev = ipv6_add_dev(dev); 2516d31c7b8fSEvgeniy Polyakov 2517e3ec6cfcSBenjamin Thery if (idev) { 251899081049SKristian Slavov idev->if_flags |= IF_READY; 2519e3ec6cfcSBenjamin Thery run_pending = 1; 2520e3ec6cfcSBenjamin Thery } 25213c21edbdSYOSHIFUJI Hideaki } else { 2522f24e3d65SMitsuru Chinen if (!addrconf_qdisc_ok(dev)) { 25233c21edbdSYOSHIFUJI Hideaki /* device is still not ready. */ 25243c21edbdSYOSHIFUJI Hideaki break; 25253c21edbdSYOSHIFUJI Hideaki } 25263c21edbdSYOSHIFUJI Hideaki 25273c21edbdSYOSHIFUJI Hideaki if (idev) { 2528bcdd553fSStephen Hemminger if (idev->if_flags & IF_READY) 25293c21edbdSYOSHIFUJI Hideaki /* device is already configured. */ 25303c21edbdSYOSHIFUJI Hideaki break; 25313c21edbdSYOSHIFUJI Hideaki idev->if_flags |= IF_READY; 25323c21edbdSYOSHIFUJI Hideaki } 25333c21edbdSYOSHIFUJI Hideaki 25343c21edbdSYOSHIFUJI Hideaki printk(KERN_INFO 25353c21edbdSYOSHIFUJI Hideaki "ADDRCONF(NETDEV_CHANGE): %s: " 25363c21edbdSYOSHIFUJI Hideaki "link becomes ready\n", 25373c21edbdSYOSHIFUJI Hideaki dev->name); 25383c21edbdSYOSHIFUJI Hideaki 2539c5e33bddSYOSHIFUJI Hideaki run_pending = 1; 25403c21edbdSYOSHIFUJI Hideaki } 25413c21edbdSYOSHIFUJI Hideaki 25421da177e4SLinus Torvalds switch (dev->type) { 25430be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) 25441da177e4SLinus Torvalds case ARPHRD_SIT: 25451da177e4SLinus Torvalds addrconf_sit_config(dev); 25461da177e4SLinus Torvalds break; 25470be669bbSJoerg Roedel #endif 25481da177e4SLinus Torvalds case ARPHRD_TUNNEL6: 25491da177e4SLinus Torvalds addrconf_ip6_tnl_config(dev); 25501da177e4SLinus Torvalds break; 25511da177e4SLinus Torvalds case ARPHRD_LOOPBACK: 25521da177e4SLinus Torvalds init_loopback(dev); 25531da177e4SLinus Torvalds break; 25541da177e4SLinus Torvalds 25551da177e4SLinus Torvalds default: 25561da177e4SLinus Torvalds addrconf_dev_config(dev); 25571da177e4SLinus Torvalds break; 25583ff50b79SStephen Hemminger } 2559bcdd553fSStephen Hemminger 25601da177e4SLinus Torvalds if (idev) { 2561c5e33bddSYOSHIFUJI Hideaki if (run_pending) 2562c5e33bddSYOSHIFUJI Hideaki addrconf_dad_run(idev); 2563c5e33bddSYOSHIFUJI Hideaki 2564bcdd553fSStephen Hemminger /* 2565bcdd553fSStephen Hemminger * If the MTU changed during the interface down, 2566bcdd553fSStephen Hemminger * when the interface up, the changed MTU must be 2567bcdd553fSStephen Hemminger * reflected in the idev as well as routers. 25681da177e4SLinus Torvalds */ 2569bcdd553fSStephen Hemminger if (idev->cnf.mtu6 != dev->mtu && 2570bcdd553fSStephen Hemminger dev->mtu >= IPV6_MIN_MTU) { 25711da177e4SLinus Torvalds rt6_mtu_change(dev, dev->mtu); 25721da177e4SLinus Torvalds idev->cnf.mtu6 = dev->mtu; 25731da177e4SLinus Torvalds } 25741da177e4SLinus Torvalds idev->tstamp = jiffies; 25751da177e4SLinus Torvalds inet6_ifinfo_notify(RTM_NEWLINK, idev); 2576bcdd553fSStephen Hemminger 2577bcdd553fSStephen Hemminger /* 2578bcdd553fSStephen Hemminger * If the changed mtu during down is lower than 2579bcdd553fSStephen Hemminger * IPV6_MIN_MTU stop IPv6 on this interface. 25801da177e4SLinus Torvalds */ 25811da177e4SLinus Torvalds if (dev->mtu < IPV6_MIN_MTU) 2582bcdd553fSStephen Hemminger addrconf_ifdown(dev, 1); 25831da177e4SLinus Torvalds } 25841da177e4SLinus Torvalds break; 25851da177e4SLinus Torvalds 25861da177e4SLinus Torvalds case NETDEV_CHANGEMTU: 25871da177e4SLinus Torvalds if (idev && dev->mtu >= IPV6_MIN_MTU) { 25881da177e4SLinus Torvalds rt6_mtu_change(dev, dev->mtu); 25891da177e4SLinus Torvalds idev->cnf.mtu6 = dev->mtu; 25901da177e4SLinus Torvalds break; 25911da177e4SLinus Torvalds } 25921da177e4SLinus Torvalds 2593d31c7b8fSEvgeniy Polyakov if (!idev && dev->mtu >= IPV6_MIN_MTU) { 2594d31c7b8fSEvgeniy Polyakov idev = ipv6_add_dev(dev); 2595d31c7b8fSEvgeniy Polyakov if (idev) 2596d31c7b8fSEvgeniy Polyakov break; 2597d31c7b8fSEvgeniy Polyakov } 2598d31c7b8fSEvgeniy Polyakov 2599bcdd553fSStephen Hemminger /* 2600bcdd553fSStephen Hemminger * MTU falled under IPV6_MIN_MTU. 2601bcdd553fSStephen Hemminger * Stop IPv6 on this interface. 2602bcdd553fSStephen Hemminger */ 26031da177e4SLinus Torvalds 26041da177e4SLinus Torvalds case NETDEV_DOWN: 26051da177e4SLinus Torvalds case NETDEV_UNREGISTER: 26061da177e4SLinus Torvalds /* 26071da177e4SLinus Torvalds * Remove all addresses from this interface. 26081da177e4SLinus Torvalds */ 26091da177e4SLinus Torvalds addrconf_ifdown(dev, event != NETDEV_DOWN); 26101da177e4SLinus Torvalds break; 26113c21edbdSYOSHIFUJI Hideaki 26121da177e4SLinus Torvalds case NETDEV_CHANGENAME: 26131da177e4SLinus Torvalds if (idev) { 26145632c515SStephen Hemminger snmp6_unregister_dev(idev); 2615408c4768SPavel Emelyanov addrconf_sysctl_unregister(idev); 2616f52295a9SPavel Emelyanov addrconf_sysctl_register(idev); 2617b217d616SHerbert Xu err = snmp6_register_dev(idev); 2618b217d616SHerbert Xu if (err) 2619b217d616SHerbert Xu return notifier_from_errno(err); 26205632c515SStephen Hemminger } 26211da177e4SLinus Torvalds break; 2622bcdd553fSStephen Hemminger 262393d9b7d7SJiri Pirko case NETDEV_PRE_TYPE_CHANGE: 262493d9b7d7SJiri Pirko case NETDEV_POST_TYPE_CHANGE: 262593d9b7d7SJiri Pirko addrconf_type_change(dev, event); 262675c78500SMoni Shoua break; 26273ff50b79SStephen Hemminger } 26281da177e4SLinus Torvalds 26291da177e4SLinus Torvalds return NOTIFY_OK; 26301da177e4SLinus Torvalds } 26311da177e4SLinus Torvalds 26321da177e4SLinus Torvalds /* 26331da177e4SLinus Torvalds * addrconf module should be notified of a device going up 26341da177e4SLinus Torvalds */ 26351da177e4SLinus Torvalds static struct notifier_block ipv6_dev_notf = { 26361da177e4SLinus Torvalds .notifier_call = addrconf_notify, 26371da177e4SLinus Torvalds }; 26381da177e4SLinus Torvalds 263993d9b7d7SJiri Pirko static void addrconf_type_change(struct net_device *dev, unsigned long event) 264075c78500SMoni Shoua { 264175c78500SMoni Shoua struct inet6_dev *idev; 264275c78500SMoni Shoua ASSERT_RTNL(); 264375c78500SMoni Shoua 264475c78500SMoni Shoua idev = __in6_dev_get(dev); 264575c78500SMoni Shoua 264693d9b7d7SJiri Pirko if (event == NETDEV_POST_TYPE_CHANGE) 264775c78500SMoni Shoua ipv6_mc_remap(idev); 264893d9b7d7SJiri Pirko else if (event == NETDEV_PRE_TYPE_CHANGE) 264975c78500SMoni Shoua ipv6_mc_unmap(idev); 265075c78500SMoni Shoua } 265175c78500SMoni Shoua 26521da177e4SLinus Torvalds static int addrconf_ifdown(struct net_device *dev, int how) 26531da177e4SLinus Torvalds { 2654c346dca1SYOSHIFUJI Hideaki struct net *net = dev_net(dev); 2655502a2ffdSstephen hemminger struct inet6_dev *idev; 2656502a2ffdSstephen hemminger struct inet6_ifaddr *ifa; 2657502a2ffdSstephen hemminger LIST_HEAD(keep_list); 26584c5ff6a6SHerbert Xu int state; 26591da177e4SLinus Torvalds 26601da177e4SLinus Torvalds ASSERT_RTNL(); 26611da177e4SLinus Torvalds 2662f3db4851SDaniel Lezcano rt6_ifdown(net, dev); 26631da177e4SLinus Torvalds neigh_ifdown(&nd_tbl, dev); 26641da177e4SLinus Torvalds 26651da177e4SLinus Torvalds idev = __in6_dev_get(dev); 26661da177e4SLinus Torvalds if (idev == NULL) 26671da177e4SLinus Torvalds return -ENODEV; 26681da177e4SLinus Torvalds 2669bcdd553fSStephen Hemminger /* 2670bcdd553fSStephen Hemminger * Step 1: remove reference to ipv6 device from parent device. 2671bcdd553fSStephen Hemminger * Do not dev_put! 26721da177e4SLinus Torvalds */ 2673439e2385SDenis V. Lunev if (how) { 26741da177e4SLinus Torvalds idev->dead = 1; 26758814c4b5SYOSHIFUJI Hideaki 26768814c4b5SYOSHIFUJI Hideaki /* protected by rtnl_lock */ 26778814c4b5SYOSHIFUJI Hideaki rcu_assign_pointer(dev->ip6_ptr, NULL); 26781da177e4SLinus Torvalds 26791da177e4SLinus Torvalds /* Step 1.5: remove snmp6 entry */ 26801da177e4SLinus Torvalds snmp6_unregister_dev(idev); 26811da177e4SLinus Torvalds 26821da177e4SLinus Torvalds } 26831da177e4SLinus Torvalds 26841da177e4SLinus Torvalds write_lock_bh(&idev->lock); 26851da177e4SLinus Torvalds 2686bcdd553fSStephen Hemminger /* Step 2: clear flags for stateless addrconf */ 2687439e2385SDenis V. Lunev if (!how) 26883c21edbdSYOSHIFUJI Hideaki idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); 26891da177e4SLinus Torvalds 26901da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 2691439e2385SDenis V. Lunev if (how && del_timer(&idev->regen_timer)) 26921da177e4SLinus Torvalds in6_dev_put(idev); 26931da177e4SLinus Torvalds 2694bcdd553fSStephen Hemminger /* Step 3: clear tempaddr list */ 2695372e6c8fSstephen hemminger while (!list_empty(&idev->tempaddr_list)) { 2696372e6c8fSstephen hemminger ifa = list_first_entry(&idev->tempaddr_list, 2697372e6c8fSstephen hemminger struct inet6_ifaddr, tmp_list); 2698372e6c8fSstephen hemminger list_del(&ifa->tmp_list); 26991da177e4SLinus Torvalds write_unlock_bh(&idev->lock); 27001da177e4SLinus Torvalds spin_lock_bh(&ifa->lock); 27011da177e4SLinus Torvalds 27021da177e4SLinus Torvalds if (ifa->ifpub) { 27031da177e4SLinus Torvalds in6_ifa_put(ifa->ifpub); 27041da177e4SLinus Torvalds ifa->ifpub = NULL; 27051da177e4SLinus Torvalds } 27061da177e4SLinus Torvalds spin_unlock_bh(&ifa->lock); 27071da177e4SLinus Torvalds in6_ifa_put(ifa); 27081da177e4SLinus Torvalds write_lock_bh(&idev->lock); 27091da177e4SLinus Torvalds } 27101da177e4SLinus Torvalds #endif 27118f37ada5Sstephen hemminger 2712502a2ffdSstephen hemminger while (!list_empty(&idev->addr_list)) { 2713502a2ffdSstephen hemminger ifa = list_first_entry(&idev->addr_list, 2714502a2ffdSstephen hemminger struct inet6_ifaddr, if_list); 271584e8b803Sstephen hemminger addrconf_del_timer(ifa); 271684e8b803Sstephen hemminger 271784e8b803Sstephen hemminger /* If just doing link down, and address is permanent 271884e8b803Sstephen hemminger and not link-local, then retain it. */ 2719bcdd553fSStephen Hemminger if (!how && 272084e8b803Sstephen hemminger (ifa->flags&IFA_F_PERMANENT) && 272184e8b803Sstephen hemminger !(ipv6_addr_type(&ifa->addr) & IPV6_ADDR_LINKLOCAL)) { 2722502a2ffdSstephen hemminger list_move_tail(&ifa->if_list, &keep_list); 2723dc2b99f7Sstephen hemminger 272484e8b803Sstephen hemminger /* If not doing DAD on this address, just keep it. */ 272584e8b803Sstephen hemminger if ((dev->flags&(IFF_NOARP|IFF_LOOPBACK)) || 2726dc2b99f7Sstephen hemminger idev->cnf.accept_dad <= 0 || 272784e8b803Sstephen hemminger (ifa->flags & IFA_F_NODAD)) 272884e8b803Sstephen hemminger continue; 272984e8b803Sstephen hemminger 273084e8b803Sstephen hemminger /* If it was tentative already, no need to notify */ 273184e8b803Sstephen hemminger if (ifa->flags & IFA_F_TENTATIVE) 273284e8b803Sstephen hemminger continue; 273384e8b803Sstephen hemminger 273484e8b803Sstephen hemminger /* Flag it for later restoration when link comes up */ 2735dc2b99f7Sstephen hemminger ifa->flags |= IFA_F_TENTATIVE; 2736f2344a13SHerbert Xu ifa->state = INET6_IFADDR_STATE_DAD; 27374c5ff6a6SHerbert Xu 273827bdb2abSstephen hemminger write_unlock_bh(&idev->lock); 27394c5ff6a6SHerbert Xu 27404c5ff6a6SHerbert Xu in6_ifa_hold(ifa); 2741dc2b99f7Sstephen hemminger } else { 2742502a2ffdSstephen hemminger list_del(&ifa->if_list); 27431da177e4SLinus Torvalds 2744c2e21293Sstephen hemminger /* clear hash table */ 27455c578aedSstephen hemminger spin_lock_bh(&addrconf_hash_lock); 27465c578aedSstephen hemminger hlist_del_init_rcu(&ifa->addr_lst); 27475c578aedSstephen hemminger spin_unlock_bh(&addrconf_hash_lock); 27484c5ff6a6SHerbert Xu 27494c5ff6a6SHerbert Xu write_unlock_bh(&idev->lock); 27504c5ff6a6SHerbert Xu spin_lock_bh(&ifa->state_lock); 27514c5ff6a6SHerbert Xu state = ifa->state; 27524c5ff6a6SHerbert Xu ifa->state = INET6_IFADDR_STATE_DEAD; 27534c5ff6a6SHerbert Xu spin_unlock_bh(&ifa->state_lock); 27544c5ff6a6SHerbert Xu 27554c5ff6a6SHerbert Xu if (state == INET6_IFADDR_STATE_DEAD) 27564c5ff6a6SHerbert Xu goto put_ifa; 275727bdb2abSstephen hemminger } 2758c2e21293Sstephen hemminger 27591da177e4SLinus Torvalds __ipv6_ifa_notify(RTM_DELADDR, ifa); 2760e9d3e084SHerbert Xu if (ifa->state == INET6_IFADDR_STATE_DEAD) 27618595805aSstephen hemminger atomic_notifier_call_chain(&inet6addr_chain, 27628595805aSstephen hemminger NETDEV_DOWN, ifa); 27634c5ff6a6SHerbert Xu 27644c5ff6a6SHerbert Xu put_ifa: 27651da177e4SLinus Torvalds in6_ifa_put(ifa); 27661da177e4SLinus Torvalds 27671da177e4SLinus Torvalds write_lock_bh(&idev->lock); 27681da177e4SLinus Torvalds } 27698f37ada5Sstephen hemminger 2770502a2ffdSstephen hemminger list_splice(&keep_list, &idev->addr_list); 27718f37ada5Sstephen hemminger 27721da177e4SLinus Torvalds write_unlock_bh(&idev->lock); 27731da177e4SLinus Torvalds 27741da177e4SLinus Torvalds /* Step 5: Discard multicast list */ 2775439e2385SDenis V. Lunev if (how) 27761da177e4SLinus Torvalds ipv6_mc_destroy_dev(idev); 27771da177e4SLinus Torvalds else 27781da177e4SLinus Torvalds ipv6_mc_down(idev); 27791da177e4SLinus Torvalds 27801da177e4SLinus Torvalds idev->tstamp = jiffies; 27811da177e4SLinus Torvalds 2782bcdd553fSStephen Hemminger /* Last: Shot the device (if unregistered) */ 2783439e2385SDenis V. Lunev if (how) { 2784408c4768SPavel Emelyanov addrconf_sysctl_unregister(idev); 27851da177e4SLinus Torvalds neigh_parms_release(&nd_tbl, idev->nd_parms); 27861da177e4SLinus Torvalds neigh_ifdown(&nd_tbl, dev); 27871da177e4SLinus Torvalds in6_dev_put(idev); 27881da177e4SLinus Torvalds } 27891da177e4SLinus Torvalds return 0; 27901da177e4SLinus Torvalds } 27911da177e4SLinus Torvalds 27921da177e4SLinus Torvalds static void addrconf_rs_timer(unsigned long data) 27931da177e4SLinus Torvalds { 27941da177e4SLinus Torvalds struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; 27955b2a1953Sstephen hemminger struct inet6_dev *idev = ifp->idev; 27961da177e4SLinus Torvalds 27975b2a1953Sstephen hemminger read_lock(&idev->lock); 27985b2a1953Sstephen hemminger if (idev->dead || !(idev->if_flags & IF_READY)) 27991da177e4SLinus Torvalds goto out; 28001da177e4SLinus Torvalds 28015b2a1953Sstephen hemminger if (idev->cnf.forwarding) 28021da177e4SLinus Torvalds goto out; 28035b2a1953Sstephen hemminger 28045b2a1953Sstephen hemminger /* Announcement received after solicitation was sent */ 28055b2a1953Sstephen hemminger if (idev->if_flags & IF_RA_RCVD) 28065b2a1953Sstephen hemminger goto out; 28071da177e4SLinus Torvalds 28081da177e4SLinus Torvalds spin_lock(&ifp->lock); 28095b2a1953Sstephen hemminger if (ifp->probes++ < idev->cnf.rtr_solicits) { 28101da177e4SLinus Torvalds /* The wait after the last probe can be shorter */ 28111da177e4SLinus Torvalds addrconf_mod_timer(ifp, AC_RS, 28125b2a1953Sstephen hemminger (ifp->probes == idev->cnf.rtr_solicits) ? 28135b2a1953Sstephen hemminger idev->cnf.rtr_solicit_delay : 28145b2a1953Sstephen hemminger idev->cnf.rtr_solicit_interval); 28151da177e4SLinus Torvalds spin_unlock(&ifp->lock); 28161da177e4SLinus Torvalds 28175b2a1953Sstephen hemminger ndisc_send_rs(idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); 28181da177e4SLinus Torvalds } else { 28191da177e4SLinus Torvalds spin_unlock(&ifp->lock); 28201da177e4SLinus Torvalds /* 28211da177e4SLinus Torvalds * Note: we do not support deprecated "all on-link" 28221da177e4SLinus Torvalds * assumption any longer. 28231da177e4SLinus Torvalds */ 28241da177e4SLinus Torvalds printk(KERN_DEBUG "%s: no IPv6 routers present\n", 28255b2a1953Sstephen hemminger idev->dev->name); 28261da177e4SLinus Torvalds } 28271da177e4SLinus Torvalds 28281da177e4SLinus Torvalds out: 28295b2a1953Sstephen hemminger read_unlock(&idev->lock); 28301da177e4SLinus Torvalds in6_ifa_put(ifp); 28311da177e4SLinus Torvalds } 28321da177e4SLinus Torvalds 28331da177e4SLinus Torvalds /* 28341da177e4SLinus Torvalds * Duplicate Address Detection 28351da177e4SLinus Torvalds */ 28363c21edbdSYOSHIFUJI Hideaki static void addrconf_dad_kick(struct inet6_ifaddr *ifp) 28373c21edbdSYOSHIFUJI Hideaki { 28383c21edbdSYOSHIFUJI Hideaki unsigned long rand_num; 28393c21edbdSYOSHIFUJI Hideaki struct inet6_dev *idev = ifp->idev; 28403c21edbdSYOSHIFUJI Hideaki 284195c385b4SNeil Horman if (ifp->flags & IFA_F_OPTIMISTIC) 284295c385b4SNeil Horman rand_num = 0; 284395c385b4SNeil Horman else 28443c21edbdSYOSHIFUJI Hideaki rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); 284595c385b4SNeil Horman 28463c21edbdSYOSHIFUJI Hideaki ifp->probes = idev->cnf.dad_transmits; 28473c21edbdSYOSHIFUJI Hideaki addrconf_mod_timer(ifp, AC_DAD, rand_num); 28483c21edbdSYOSHIFUJI Hideaki } 28493c21edbdSYOSHIFUJI Hideaki 2850e431b8c0SJamal Hadi Salim static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) 28511da177e4SLinus Torvalds { 28521da177e4SLinus Torvalds struct inet6_dev *idev = ifp->idev; 28531da177e4SLinus Torvalds struct net_device *dev = idev->dev; 28541da177e4SLinus Torvalds 28551da177e4SLinus Torvalds addrconf_join_solict(dev, &ifp->addr); 28561da177e4SLinus Torvalds 28571da177e4SLinus Torvalds net_srandom(ifp->addr.s6_addr32[3]); 28581da177e4SLinus Torvalds 28591da177e4SLinus Torvalds read_lock_bh(&idev->lock); 2860622ccdf1SHerbert Xu spin_lock(&ifp->lock); 2861e9d3e084SHerbert Xu if (ifp->state == INET6_IFADDR_STATE_DEAD) 28621da177e4SLinus Torvalds goto out; 28631da177e4SLinus Torvalds 28641da177e4SLinus Torvalds if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || 28651b34be74SYOSHIFUJI Hideaki idev->cnf.accept_dad < 1 || 286655ebaef1SNoriaki TAKAMIYA !(ifp->flags&IFA_F_TENTATIVE) || 286755ebaef1SNoriaki TAKAMIYA ifp->flags & IFA_F_NODAD) { 2868cc411d0bSBrian Haley ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); 286921809fafSstephen hemminger spin_unlock(&ifp->lock); 28701da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 28711da177e4SLinus Torvalds 28721da177e4SLinus Torvalds addrconf_dad_completed(ifp); 28731da177e4SLinus Torvalds return; 28741da177e4SLinus Torvalds } 28751da177e4SLinus Torvalds 28766732badeSYOSHIFUJI Hideaki if (!(idev->if_flags & IF_READY)) { 287721809fafSstephen hemminger spin_unlock(&ifp->lock); 28786732badeSYOSHIFUJI Hideaki read_unlock_bh(&idev->lock); 28793c21edbdSYOSHIFUJI Hideaki /* 2880590a9887SMasatake YAMATO * If the device is not ready: 28813c21edbdSYOSHIFUJI Hideaki * - keep it tentative if it is a permanent address. 28823c21edbdSYOSHIFUJI Hideaki * - otherwise, kill it. 28833c21edbdSYOSHIFUJI Hideaki */ 28843c21edbdSYOSHIFUJI Hideaki in6_ifa_hold(ifp); 2885cc411d0bSBrian Haley addrconf_dad_stop(ifp, 0); 28866732badeSYOSHIFUJI Hideaki return; 28873c21edbdSYOSHIFUJI Hideaki } 288895c385b4SNeil Horman 288995c385b4SNeil Horman /* 289095c385b4SNeil Horman * Optimistic nodes can start receiving 289195c385b4SNeil Horman * Frames right away 289295c385b4SNeil Horman */ 289395c385b4SNeil Horman if (ifp->flags & IFA_F_OPTIMISTIC) 289495c385b4SNeil Horman ip6_ins_rt(ifp->rt); 289595c385b4SNeil Horman 28966732badeSYOSHIFUJI Hideaki addrconf_dad_kick(ifp); 28971da177e4SLinus Torvalds out: 2898622ccdf1SHerbert Xu spin_unlock(&ifp->lock); 28991da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 29001da177e4SLinus Torvalds } 29011da177e4SLinus Torvalds 29021da177e4SLinus Torvalds static void addrconf_dad_timer(unsigned long data) 29031da177e4SLinus Torvalds { 29041da177e4SLinus Torvalds struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; 29051da177e4SLinus Torvalds struct inet6_dev *idev = ifp->idev; 29061da177e4SLinus Torvalds struct in6_addr mcaddr; 29071da177e4SLinus Torvalds 2908f2344a13SHerbert Xu if (!ifp->probes && addrconf_dad_end(ifp)) 2909f2344a13SHerbert Xu goto out; 2910f2344a13SHerbert Xu 2911122e4519Sstephen hemminger read_lock(&idev->lock); 2912122e4519Sstephen hemminger if (idev->dead || !(idev->if_flags & IF_READY)) { 2913122e4519Sstephen hemminger read_unlock(&idev->lock); 29141da177e4SLinus Torvalds goto out; 29151da177e4SLinus Torvalds } 291621809fafSstephen hemminger 291721809fafSstephen hemminger spin_lock(&ifp->lock); 2918622ccdf1SHerbert Xu if (ifp->state == INET6_IFADDR_STATE_DEAD) { 2919622ccdf1SHerbert Xu spin_unlock(&ifp->lock); 2920622ccdf1SHerbert Xu read_unlock(&idev->lock); 2921622ccdf1SHerbert Xu goto out; 2922622ccdf1SHerbert Xu } 2923622ccdf1SHerbert Xu 29241da177e4SLinus Torvalds if (ifp->probes == 0) { 29251da177e4SLinus Torvalds /* 29261da177e4SLinus Torvalds * DAD was successful 29271da177e4SLinus Torvalds */ 29281da177e4SLinus Torvalds 2929cc411d0bSBrian Haley ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); 293021809fafSstephen hemminger spin_unlock(&ifp->lock); 2931122e4519Sstephen hemminger read_unlock(&idev->lock); 29321da177e4SLinus Torvalds 29331da177e4SLinus Torvalds addrconf_dad_completed(ifp); 29341da177e4SLinus Torvalds 29351da177e4SLinus Torvalds goto out; 29361da177e4SLinus Torvalds } 29371da177e4SLinus Torvalds 29381da177e4SLinus Torvalds ifp->probes--; 29391da177e4SLinus Torvalds addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); 294021809fafSstephen hemminger spin_unlock(&ifp->lock); 2941122e4519Sstephen hemminger read_unlock(&idev->lock); 29421da177e4SLinus Torvalds 29431da177e4SLinus Torvalds /* send a neighbour solicitation for our addr */ 29441da177e4SLinus Torvalds addrconf_addr_solict_mult(&ifp->addr, &mcaddr); 2945d7aabf22SYOSHIFUJI Hideaki ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any); 29461da177e4SLinus Torvalds out: 29471da177e4SLinus Torvalds in6_ifa_put(ifp); 29481da177e4SLinus Torvalds } 29491da177e4SLinus Torvalds 29501da177e4SLinus Torvalds static void addrconf_dad_completed(struct inet6_ifaddr *ifp) 29511da177e4SLinus Torvalds { 29521da177e4SLinus Torvalds struct net_device *dev = ifp->idev->dev; 29531da177e4SLinus Torvalds 29541da177e4SLinus Torvalds /* 29551da177e4SLinus Torvalds * Configure the address for reception. Now it is valid. 29561da177e4SLinus Torvalds */ 29571da177e4SLinus Torvalds 29581da177e4SLinus Torvalds ipv6_ifa_notify(RTM_NEWADDR, ifp); 29591da177e4SLinus Torvalds 29601da177e4SLinus Torvalds /* If added prefix is link local and forwarding is off, 29611da177e4SLinus Torvalds start sending router solicitations. 29621da177e4SLinus Torvalds */ 29631da177e4SLinus Torvalds 29641da177e4SLinus Torvalds if (ifp->idev->cnf.forwarding == 0 && 29651da177e4SLinus Torvalds ifp->idev->cnf.rtr_solicits > 0 && 29661da177e4SLinus Torvalds (dev->flags&IFF_LOOPBACK) == 0 && 29671da177e4SLinus Torvalds (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { 29681da177e4SLinus Torvalds /* 29691da177e4SLinus Torvalds * If a host as already performed a random delay 29701da177e4SLinus Torvalds * [...] as part of DAD [...] there is no need 29711da177e4SLinus Torvalds * to delay again before sending the first RS 29721da177e4SLinus Torvalds */ 2973f3ee4010SYOSHIFUJI Hideaki ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); 29741da177e4SLinus Torvalds 29751da177e4SLinus Torvalds spin_lock_bh(&ifp->lock); 29761da177e4SLinus Torvalds ifp->probes = 1; 29771da177e4SLinus Torvalds ifp->idev->if_flags |= IF_RS_SENT; 29781da177e4SLinus Torvalds addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); 29791da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 29801da177e4SLinus Torvalds } 29811da177e4SLinus Torvalds } 29821da177e4SLinus Torvalds 2983e21e8467SStephen Hemminger static void addrconf_dad_run(struct inet6_dev *idev) 2984e21e8467SStephen Hemminger { 2985c5e33bddSYOSHIFUJI Hideaki struct inet6_ifaddr *ifp; 2986c5e33bddSYOSHIFUJI Hideaki 2987c5e33bddSYOSHIFUJI Hideaki read_lock_bh(&idev->lock); 2988502a2ffdSstephen hemminger list_for_each_entry(ifp, &idev->addr_list, if_list) { 298921809fafSstephen hemminger spin_lock(&ifp->lock); 2990f2344a13SHerbert Xu if (ifp->flags & IFA_F_TENTATIVE && 2991f2344a13SHerbert Xu ifp->state == INET6_IFADDR_STATE_DAD) 2992c5e33bddSYOSHIFUJI Hideaki addrconf_dad_kick(ifp); 2993f2344a13SHerbert Xu spin_unlock(&ifp->lock); 2994c5e33bddSYOSHIFUJI Hideaki } 2995c5e33bddSYOSHIFUJI Hideaki read_unlock_bh(&idev->lock); 2996c5e33bddSYOSHIFUJI Hideaki } 2997c5e33bddSYOSHIFUJI Hideaki 29981da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 29991da177e4SLinus Torvalds struct if6_iter_state { 30003c40090aSDaniel Lezcano struct seq_net_private p; 30011da177e4SLinus Torvalds int bucket; 30021da177e4SLinus Torvalds }; 30031da177e4SLinus Torvalds 30041da177e4SLinus Torvalds static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) 30051da177e4SLinus Torvalds { 30061da177e4SLinus Torvalds struct inet6_ifaddr *ifa = NULL; 30071da177e4SLinus Torvalds struct if6_iter_state *state = seq->private; 30081218854aSYOSHIFUJI Hideaki struct net *net = seq_file_net(seq); 30091da177e4SLinus Torvalds 30101da177e4SLinus Torvalds for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { 3011c2e21293Sstephen hemminger struct hlist_node *n; 30124f70eccaSEric Dumazet hlist_for_each_entry_rcu_bh(ifa, n, &inet6_addr_lst[state->bucket], 30135c578aedSstephen hemminger addr_lst) 3014c2e21293Sstephen hemminger if (net_eq(dev_net(ifa->idev->dev), net)) 30151da177e4SLinus Torvalds return ifa; 30161da177e4SLinus Torvalds } 3017c2e21293Sstephen hemminger return NULL; 3018c2e21293Sstephen hemminger } 30191da177e4SLinus Torvalds 3020c2e21293Sstephen hemminger static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, 3021c2e21293Sstephen hemminger struct inet6_ifaddr *ifa) 30221da177e4SLinus Torvalds { 30231da177e4SLinus Torvalds struct if6_iter_state *state = seq->private; 30241218854aSYOSHIFUJI Hideaki struct net *net = seq_file_net(seq); 3025c2e21293Sstephen hemminger struct hlist_node *n = &ifa->addr_lst; 30261da177e4SLinus Torvalds 30274f70eccaSEric Dumazet hlist_for_each_entry_continue_rcu_bh(ifa, n, addr_lst) 3028c2e21293Sstephen hemminger if (net_eq(dev_net(ifa->idev->dev), net)) 30291da177e4SLinus Torvalds return ifa; 30301da177e4SLinus Torvalds 3031c2e21293Sstephen hemminger while (++state->bucket < IN6_ADDR_HSIZE) { 30324f70eccaSEric Dumazet hlist_for_each_entry_rcu_bh(ifa, n, 3033c2e21293Sstephen hemminger &inet6_addr_lst[state->bucket], addr_lst) { 3034c2e21293Sstephen hemminger if (net_eq(dev_net(ifa->idev->dev), net)) 3035c2e21293Sstephen hemminger return ifa; 3036c2e21293Sstephen hemminger } 3037c2e21293Sstephen hemminger } 3038c2e21293Sstephen hemminger 3039c2e21293Sstephen hemminger return NULL; 3040c2e21293Sstephen hemminger } 3041c2e21293Sstephen hemminger 30421da177e4SLinus Torvalds static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) 30431da177e4SLinus Torvalds { 30441da177e4SLinus Torvalds struct inet6_ifaddr *ifa = if6_get_first(seq); 30451da177e4SLinus Torvalds 30461da177e4SLinus Torvalds if (ifa) 30471da177e4SLinus Torvalds while (pos && (ifa = if6_get_next(seq, ifa)) != NULL) 30481da177e4SLinus Torvalds --pos; 30491da177e4SLinus Torvalds return pos ? NULL : ifa; 30501da177e4SLinus Torvalds } 30511da177e4SLinus Torvalds 30521da177e4SLinus Torvalds static void *if6_seq_start(struct seq_file *seq, loff_t *pos) 30534f70eccaSEric Dumazet __acquires(rcu_bh) 30541da177e4SLinus Torvalds { 30555c578aedSstephen hemminger rcu_read_lock_bh(); 30561da177e4SLinus Torvalds return if6_get_idx(seq, *pos); 30571da177e4SLinus Torvalds } 30581da177e4SLinus Torvalds 30591da177e4SLinus Torvalds static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) 30601da177e4SLinus Torvalds { 30611da177e4SLinus Torvalds struct inet6_ifaddr *ifa; 30621da177e4SLinus Torvalds 30631da177e4SLinus Torvalds ifa = if6_get_next(seq, v); 30641da177e4SLinus Torvalds ++*pos; 30651da177e4SLinus Torvalds return ifa; 30661da177e4SLinus Torvalds } 30671da177e4SLinus Torvalds 30681da177e4SLinus Torvalds static void if6_seq_stop(struct seq_file *seq, void *v) 30694f70eccaSEric Dumazet __releases(rcu_bh) 30701da177e4SLinus Torvalds { 30715c578aedSstephen hemminger rcu_read_unlock_bh(); 30721da177e4SLinus Torvalds } 30731da177e4SLinus Torvalds 30741da177e4SLinus Torvalds static int if6_seq_show(struct seq_file *seq, void *v) 30751da177e4SLinus Torvalds { 30761da177e4SLinus Torvalds struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; 30774b7a4274SHarvey Harrison seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", 3078b071195dSHarvey Harrison &ifp->addr, 30791da177e4SLinus Torvalds ifp->idev->dev->ifindex, 30801da177e4SLinus Torvalds ifp->prefix_len, 30811da177e4SLinus Torvalds ifp->scope, 30821da177e4SLinus Torvalds ifp->flags, 30831da177e4SLinus Torvalds ifp->idev->dev->name); 30841da177e4SLinus Torvalds return 0; 30851da177e4SLinus Torvalds } 30861da177e4SLinus Torvalds 308756b3d975SPhilippe De Muyter static const struct seq_operations if6_seq_ops = { 30881da177e4SLinus Torvalds .start = if6_seq_start, 30891da177e4SLinus Torvalds .next = if6_seq_next, 30901da177e4SLinus Torvalds .show = if6_seq_show, 30911da177e4SLinus Torvalds .stop = if6_seq_stop, 30921da177e4SLinus Torvalds }; 30931da177e4SLinus Torvalds 30941da177e4SLinus Torvalds static int if6_seq_open(struct inode *inode, struct file *file) 30951da177e4SLinus Torvalds { 30963c40090aSDaniel Lezcano return seq_open_net(inode, file, &if6_seq_ops, 3097cf7732e4SPavel Emelyanov sizeof(struct if6_iter_state)); 30981da177e4SLinus Torvalds } 30991da177e4SLinus Torvalds 31009a32144eSArjan van de Ven static const struct file_operations if6_fops = { 31011da177e4SLinus Torvalds .owner = THIS_MODULE, 31021da177e4SLinus Torvalds .open = if6_seq_open, 31031da177e4SLinus Torvalds .read = seq_read, 31041da177e4SLinus Torvalds .llseek = seq_lseek, 31053c40090aSDaniel Lezcano .release = seq_release_net, 31061da177e4SLinus Torvalds }; 31071da177e4SLinus Torvalds 31082c8c1e72SAlexey Dobriyan static int __net_init if6_proc_net_init(struct net *net) 31091da177e4SLinus Torvalds { 31103c40090aSDaniel Lezcano if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops)) 31111da177e4SLinus Torvalds return -ENOMEM; 31121da177e4SLinus Torvalds return 0; 31131da177e4SLinus Torvalds } 31141da177e4SLinus Torvalds 31152c8c1e72SAlexey Dobriyan static void __net_exit if6_proc_net_exit(struct net *net) 31163c40090aSDaniel Lezcano { 31173c40090aSDaniel Lezcano proc_net_remove(net, "if_inet6"); 31183c40090aSDaniel Lezcano } 31193c40090aSDaniel Lezcano 31203c40090aSDaniel Lezcano static struct pernet_operations if6_proc_net_ops = { 31213c40090aSDaniel Lezcano .init = if6_proc_net_init, 31223c40090aSDaniel Lezcano .exit = if6_proc_net_exit, 31233c40090aSDaniel Lezcano }; 31243c40090aSDaniel Lezcano 31253c40090aSDaniel Lezcano int __init if6_proc_init(void) 31263c40090aSDaniel Lezcano { 31273c40090aSDaniel Lezcano return register_pernet_subsys(&if6_proc_net_ops); 31283c40090aSDaniel Lezcano } 31293c40090aSDaniel Lezcano 31301da177e4SLinus Torvalds void if6_proc_exit(void) 31311da177e4SLinus Torvalds { 31323c40090aSDaniel Lezcano unregister_pernet_subsys(&if6_proc_net_ops); 31331da177e4SLinus Torvalds } 31341da177e4SLinus Torvalds #endif /* CONFIG_PROC_FS */ 31351da177e4SLinus Torvalds 313659fbb3a6SMasahide NAKAMURA #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) 31373b9f9a1cSNoriaki TAKAMIYA /* Check if address is a home address configured on any interface. */ 3138389f6612SDaniel Lezcano int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr) 31393b9f9a1cSNoriaki TAKAMIYA { 31403b9f9a1cSNoriaki TAKAMIYA int ret = 0; 3141c2e21293Sstephen hemminger struct inet6_ifaddr *ifp = NULL; 3142c2e21293Sstephen hemminger struct hlist_node *n; 31433a88a81dSstephen hemminger unsigned int hash = ipv6_addr_hash(addr); 3144c2e21293Sstephen hemminger 31455c578aedSstephen hemminger rcu_read_lock_bh(); 31464f70eccaSEric Dumazet hlist_for_each_entry_rcu_bh(ifp, n, &inet6_addr_lst[hash], addr_lst) { 3147878628fbSYOSHIFUJI Hideaki if (!net_eq(dev_net(ifp->idev->dev), net)) 3148389f6612SDaniel Lezcano continue; 3149caad295fSYOSHIFUJI Hideaki if (ipv6_addr_equal(&ifp->addr, addr) && 31503b9f9a1cSNoriaki TAKAMIYA (ifp->flags & IFA_F_HOMEADDRESS)) { 31513b9f9a1cSNoriaki TAKAMIYA ret = 1; 31523b9f9a1cSNoriaki TAKAMIYA break; 31533b9f9a1cSNoriaki TAKAMIYA } 31543b9f9a1cSNoriaki TAKAMIYA } 31555c578aedSstephen hemminger rcu_read_unlock_bh(); 31563b9f9a1cSNoriaki TAKAMIYA return ret; 31573b9f9a1cSNoriaki TAKAMIYA } 31583b9f9a1cSNoriaki TAKAMIYA #endif 31593b9f9a1cSNoriaki TAKAMIYA 31601da177e4SLinus Torvalds /* 31611da177e4SLinus Torvalds * Periodic address status verification 31621da177e4SLinus Torvalds */ 31631da177e4SLinus Torvalds 31641da177e4SLinus Torvalds static void addrconf_verify(unsigned long foo) 31651da177e4SLinus Torvalds { 3166b2db7564SYOSHIFUJI Hideaki unsigned long now, next, next_sec, next_sched; 31671da177e4SLinus Torvalds struct inet6_ifaddr *ifp; 3168c2e21293Sstephen hemminger struct hlist_node *node; 31691da177e4SLinus Torvalds int i; 31701da177e4SLinus Torvalds 31715c578aedSstephen hemminger rcu_read_lock_bh(); 31725c578aedSstephen hemminger spin_lock(&addrconf_verify_lock); 31731da177e4SLinus Torvalds now = jiffies; 3174b2db7564SYOSHIFUJI Hideaki next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); 31751da177e4SLinus Torvalds 31761da177e4SLinus Torvalds del_timer(&addr_chk_timer); 31771da177e4SLinus Torvalds 31781da177e4SLinus Torvalds for (i = 0; i < IN6_ADDR_HSIZE; i++) { 31791da177e4SLinus Torvalds restart: 31804f70eccaSEric Dumazet hlist_for_each_entry_rcu_bh(ifp, node, 31815c578aedSstephen hemminger &inet6_addr_lst[i], addr_lst) { 31821da177e4SLinus Torvalds unsigned long age; 31831da177e4SLinus Torvalds 31841da177e4SLinus Torvalds if (ifp->flags & IFA_F_PERMANENT) 31851da177e4SLinus Torvalds continue; 31861da177e4SLinus Torvalds 31871da177e4SLinus Torvalds spin_lock(&ifp->lock); 3188b2db7564SYOSHIFUJI Hideaki /* We try to batch several events at once. */ 3189b2db7564SYOSHIFUJI Hideaki age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; 31901da177e4SLinus Torvalds 31918f27ebb9SYOSHIFUJI Hideaki if (ifp->valid_lft != INFINITY_LIFE_TIME && 31928f27ebb9SYOSHIFUJI Hideaki age >= ifp->valid_lft) { 31931da177e4SLinus Torvalds spin_unlock(&ifp->lock); 31941da177e4SLinus Torvalds in6_ifa_hold(ifp); 31951da177e4SLinus Torvalds ipv6_del_addr(ifp); 31961da177e4SLinus Torvalds goto restart; 31978f27ebb9SYOSHIFUJI Hideaki } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { 31988f27ebb9SYOSHIFUJI Hideaki spin_unlock(&ifp->lock); 31998f27ebb9SYOSHIFUJI Hideaki continue; 32001da177e4SLinus Torvalds } else if (age >= ifp->prefered_lft) { 3201a1ed0526SBrian Haley /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ 32021da177e4SLinus Torvalds int deprecate = 0; 32031da177e4SLinus Torvalds 32041da177e4SLinus Torvalds if (!(ifp->flags&IFA_F_DEPRECATED)) { 32051da177e4SLinus Torvalds deprecate = 1; 32061da177e4SLinus Torvalds ifp->flags |= IFA_F_DEPRECATED; 32071da177e4SLinus Torvalds } 32081da177e4SLinus Torvalds 32091da177e4SLinus Torvalds if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) 32101da177e4SLinus Torvalds next = ifp->tstamp + ifp->valid_lft * HZ; 32111da177e4SLinus Torvalds 32121da177e4SLinus Torvalds spin_unlock(&ifp->lock); 32131da177e4SLinus Torvalds 32141da177e4SLinus Torvalds if (deprecate) { 32151da177e4SLinus Torvalds in6_ifa_hold(ifp); 32161da177e4SLinus Torvalds 32171da177e4SLinus Torvalds ipv6_ifa_notify(0, ifp); 32181da177e4SLinus Torvalds in6_ifa_put(ifp); 32191da177e4SLinus Torvalds goto restart; 32201da177e4SLinus Torvalds } 32211da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 32221da177e4SLinus Torvalds } else if ((ifp->flags&IFA_F_TEMPORARY) && 32231da177e4SLinus Torvalds !(ifp->flags&IFA_F_TENTATIVE)) { 322488949cf4Sstephen hemminger unsigned long regen_advance = ifp->idev->cnf.regen_max_retry * 322588949cf4Sstephen hemminger ifp->idev->cnf.dad_transmits * 322688949cf4Sstephen hemminger ifp->idev->nd_parms->retrans_time / HZ; 322788949cf4Sstephen hemminger 32281da177e4SLinus Torvalds if (age >= ifp->prefered_lft - regen_advance) { 32291da177e4SLinus Torvalds struct inet6_ifaddr *ifpub = ifp->ifpub; 32301da177e4SLinus Torvalds if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) 32311da177e4SLinus Torvalds next = ifp->tstamp + ifp->prefered_lft * HZ; 32321da177e4SLinus Torvalds if (!ifp->regen_count && ifpub) { 32331da177e4SLinus Torvalds ifp->regen_count++; 32341da177e4SLinus Torvalds in6_ifa_hold(ifp); 32351da177e4SLinus Torvalds in6_ifa_hold(ifpub); 32361da177e4SLinus Torvalds spin_unlock(&ifp->lock); 32375c578aedSstephen hemminger 3238291d809bSHiroyuki YAMAMORI spin_lock(&ifpub->lock); 3239291d809bSHiroyuki YAMAMORI ifpub->regen_count = 0; 3240291d809bSHiroyuki YAMAMORI spin_unlock(&ifpub->lock); 32411da177e4SLinus Torvalds ipv6_create_tempaddr(ifpub, ifp); 32421da177e4SLinus Torvalds in6_ifa_put(ifpub); 32431da177e4SLinus Torvalds in6_ifa_put(ifp); 32441da177e4SLinus Torvalds goto restart; 32451da177e4SLinus Torvalds } 32461da177e4SLinus Torvalds } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) 32471da177e4SLinus Torvalds next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; 32481da177e4SLinus Torvalds spin_unlock(&ifp->lock); 32491da177e4SLinus Torvalds #endif 32501da177e4SLinus Torvalds } else { 32511da177e4SLinus Torvalds /* ifp->prefered_lft <= ifp->valid_lft */ 32521da177e4SLinus Torvalds if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) 32531da177e4SLinus Torvalds next = ifp->tstamp + ifp->prefered_lft * HZ; 32541da177e4SLinus Torvalds spin_unlock(&ifp->lock); 32551da177e4SLinus Torvalds } 32561da177e4SLinus Torvalds } 32571da177e4SLinus Torvalds } 32581da177e4SLinus Torvalds 3259b2db7564SYOSHIFUJI Hideaki next_sec = round_jiffies_up(next); 3260b2db7564SYOSHIFUJI Hideaki next_sched = next; 3261b2db7564SYOSHIFUJI Hideaki 3262b2db7564SYOSHIFUJI Hideaki /* If rounded timeout is accurate enough, accept it. */ 3263b2db7564SYOSHIFUJI Hideaki if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) 3264b2db7564SYOSHIFUJI Hideaki next_sched = next_sec; 3265b2db7564SYOSHIFUJI Hideaki 3266b2db7564SYOSHIFUJI Hideaki /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ 3267b2db7564SYOSHIFUJI Hideaki if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX)) 3268b2db7564SYOSHIFUJI Hideaki next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX; 3269b2db7564SYOSHIFUJI Hideaki 3270b2db7564SYOSHIFUJI Hideaki ADBG((KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n", 3271b2db7564SYOSHIFUJI Hideaki now, next, next_sec, next_sched)); 3272b2db7564SYOSHIFUJI Hideaki 3273b2db7564SYOSHIFUJI Hideaki addr_chk_timer.expires = next_sched; 32741da177e4SLinus Torvalds add_timer(&addr_chk_timer); 32755c578aedSstephen hemminger spin_unlock(&addrconf_verify_lock); 32765c578aedSstephen hemminger rcu_read_unlock_bh(); 32771da177e4SLinus Torvalds } 32781da177e4SLinus Torvalds 3279461d8837SThomas Graf static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) 3280461d8837SThomas Graf { 3281461d8837SThomas Graf struct in6_addr *pfx = NULL; 3282461d8837SThomas Graf 3283461d8837SThomas Graf if (addr) 3284461d8837SThomas Graf pfx = nla_data(addr); 3285461d8837SThomas Graf 3286461d8837SThomas Graf if (local) { 3287461d8837SThomas Graf if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) 3288461d8837SThomas Graf pfx = NULL; 3289461d8837SThomas Graf else 3290461d8837SThomas Graf pfx = nla_data(local); 3291461d8837SThomas Graf } 3292461d8837SThomas Graf 3293461d8837SThomas Graf return pfx; 3294461d8837SThomas Graf } 3295461d8837SThomas Graf 3296ef7c79edSPatrick McHardy static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { 3297461d8837SThomas Graf [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, 3298461d8837SThomas Graf [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, 3299461d8837SThomas Graf [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, 3300461d8837SThomas Graf }; 3301461d8837SThomas Graf 33021da177e4SLinus Torvalds static int 33031da177e4SLinus Torvalds inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 33041da177e4SLinus Torvalds { 33053b1e0a65SYOSHIFUJI Hideaki struct net *net = sock_net(skb->sk); 3306b933f716SThomas Graf struct ifaddrmsg *ifm; 3307b933f716SThomas Graf struct nlattr *tb[IFA_MAX+1]; 33081da177e4SLinus Torvalds struct in6_addr *pfx; 3309b933f716SThomas Graf int err; 33101da177e4SLinus Torvalds 3311b933f716SThomas Graf err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); 3312b933f716SThomas Graf if (err < 0) 3313b933f716SThomas Graf return err; 3314b933f716SThomas Graf 3315b933f716SThomas Graf ifm = nlmsg_data(nlh); 3316b933f716SThomas Graf pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); 33171da177e4SLinus Torvalds if (pfx == NULL) 33181da177e4SLinus Torvalds return -EINVAL; 33191da177e4SLinus Torvalds 3320af284937SDaniel Lezcano return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen); 33211da177e4SLinus Torvalds } 33221da177e4SLinus Torvalds 332355ebaef1SNoriaki TAKAMIYA static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, 332455ebaef1SNoriaki TAKAMIYA u32 prefered_lft, u32 valid_lft) 3325081bba5bSNoriaki TAKAMIYA { 33266f704992SYOSHIFUJI Hideaki u32 flags; 33276f704992SYOSHIFUJI Hideaki clock_t expires; 33284bed72e4SYOSHIFUJI Hideaki unsigned long timeout; 332946d48046SYOSHIFUJI Hideaki 3330081bba5bSNoriaki TAKAMIYA if (!valid_lft || (prefered_lft > valid_lft)) 3331081bba5bSNoriaki TAKAMIYA return -EINVAL; 3332081bba5bSNoriaki TAKAMIYA 33334bed72e4SYOSHIFUJI Hideaki timeout = addrconf_timeout_fixup(valid_lft, HZ); 33344bed72e4SYOSHIFUJI Hideaki if (addrconf_finite_timeout(timeout)) { 33354bed72e4SYOSHIFUJI Hideaki expires = jiffies_to_clock_t(timeout * HZ); 33364bed72e4SYOSHIFUJI Hideaki valid_lft = timeout; 33376f704992SYOSHIFUJI Hideaki flags = RTF_EXPIRES; 33384bed72e4SYOSHIFUJI Hideaki } else { 33394bed72e4SYOSHIFUJI Hideaki expires = 0; 33404bed72e4SYOSHIFUJI Hideaki flags = 0; 33414bed72e4SYOSHIFUJI Hideaki ifa_flags |= IFA_F_PERMANENT; 33426f704992SYOSHIFUJI Hideaki } 3343081bba5bSNoriaki TAKAMIYA 33444bed72e4SYOSHIFUJI Hideaki timeout = addrconf_timeout_fixup(prefered_lft, HZ); 33454bed72e4SYOSHIFUJI Hideaki if (addrconf_finite_timeout(timeout)) { 33464bed72e4SYOSHIFUJI Hideaki if (timeout == 0) 334755ebaef1SNoriaki TAKAMIYA ifa_flags |= IFA_F_DEPRECATED; 33484bed72e4SYOSHIFUJI Hideaki prefered_lft = timeout; 33494bed72e4SYOSHIFUJI Hideaki } 3350081bba5bSNoriaki TAKAMIYA 3351081bba5bSNoriaki TAKAMIYA spin_lock_bh(&ifp->lock); 33523b9f9a1cSNoriaki TAKAMIYA ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; 3353081bba5bSNoriaki TAKAMIYA ifp->tstamp = jiffies; 3354081bba5bSNoriaki TAKAMIYA ifp->valid_lft = valid_lft; 3355081bba5bSNoriaki TAKAMIYA ifp->prefered_lft = prefered_lft; 3356081bba5bSNoriaki TAKAMIYA 3357081bba5bSNoriaki TAKAMIYA spin_unlock_bh(&ifp->lock); 3358081bba5bSNoriaki TAKAMIYA if (!(ifp->flags&IFA_F_TENTATIVE)) 3359081bba5bSNoriaki TAKAMIYA ipv6_ifa_notify(0, ifp); 3360081bba5bSNoriaki TAKAMIYA 336146d48046SYOSHIFUJI Hideaki addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, 33626f704992SYOSHIFUJI Hideaki expires, flags); 3363081bba5bSNoriaki TAKAMIYA addrconf_verify(0); 3364081bba5bSNoriaki TAKAMIYA 3365081bba5bSNoriaki TAKAMIYA return 0; 3366081bba5bSNoriaki TAKAMIYA } 3367081bba5bSNoriaki TAKAMIYA 3368081bba5bSNoriaki TAKAMIYA static int 33691da177e4SLinus Torvalds inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 33701da177e4SLinus Torvalds { 33713b1e0a65SYOSHIFUJI Hideaki struct net *net = sock_net(skb->sk); 3372461d8837SThomas Graf struct ifaddrmsg *ifm; 3373461d8837SThomas Graf struct nlattr *tb[IFA_MAX+1]; 33741da177e4SLinus Torvalds struct in6_addr *pfx; 33757198f8ceSThomas Graf struct inet6_ifaddr *ifa; 33767198f8ceSThomas Graf struct net_device *dev; 337755ebaef1SNoriaki TAKAMIYA u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; 337855ebaef1SNoriaki TAKAMIYA u8 ifa_flags; 3379461d8837SThomas Graf int err; 33801da177e4SLinus Torvalds 3381461d8837SThomas Graf err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); 3382461d8837SThomas Graf if (err < 0) 3383461d8837SThomas Graf return err; 3384461d8837SThomas Graf 3385461d8837SThomas Graf ifm = nlmsg_data(nlh); 3386461d8837SThomas Graf pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); 33871da177e4SLinus Torvalds if (pfx == NULL) 33881da177e4SLinus Torvalds return -EINVAL; 33891da177e4SLinus Torvalds 3390461d8837SThomas Graf if (tb[IFA_CACHEINFO]) { 33910778769dSNoriaki TAKAMIYA struct ifa_cacheinfo *ci; 3392461d8837SThomas Graf 3393461d8837SThomas Graf ci = nla_data(tb[IFA_CACHEINFO]); 33940778769dSNoriaki TAKAMIYA valid_lft = ci->ifa_valid; 3395461d8837SThomas Graf preferred_lft = ci->ifa_prefered; 3396461d8837SThomas Graf } else { 3397461d8837SThomas Graf preferred_lft = INFINITY_LIFE_TIME; 3398461d8837SThomas Graf valid_lft = INFINITY_LIFE_TIME; 33990778769dSNoriaki TAKAMIYA } 34000778769dSNoriaki TAKAMIYA 3401af284937SDaniel Lezcano dev = __dev_get_by_index(net, ifm->ifa_index); 34027198f8ceSThomas Graf if (dev == NULL) 34037198f8ceSThomas Graf return -ENODEV; 3404081bba5bSNoriaki TAKAMIYA 340555ebaef1SNoriaki TAKAMIYA /* We ignore other flags so far. */ 34063b9f9a1cSNoriaki TAKAMIYA ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); 340755ebaef1SNoriaki TAKAMIYA 34081cab3da6SDaniel Lezcano ifa = ipv6_get_ifaddr(net, pfx, dev, 1); 34097198f8ceSThomas Graf if (ifa == NULL) { 34107198f8ceSThomas Graf /* 34117198f8ceSThomas Graf * It would be best to check for !NLM_F_CREATE here but 34127198f8ceSThomas Graf * userspace alreay relies on not having to provide this. 34137198f8ceSThomas Graf */ 3414af284937SDaniel Lezcano return inet6_addr_add(net, ifm->ifa_index, pfx, 3415af284937SDaniel Lezcano ifm->ifa_prefixlen, ifa_flags, 3416af284937SDaniel Lezcano preferred_lft, valid_lft); 34171da177e4SLinus Torvalds } 34181da177e4SLinus Torvalds 34197198f8ceSThomas Graf if (nlh->nlmsg_flags & NLM_F_EXCL || 34207198f8ceSThomas Graf !(nlh->nlmsg_flags & NLM_F_REPLACE)) 34217198f8ceSThomas Graf err = -EEXIST; 34227198f8ceSThomas Graf else 342355ebaef1SNoriaki TAKAMIYA err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); 34247198f8ceSThomas Graf 34257198f8ceSThomas Graf in6_ifa_put(ifa); 34267198f8ceSThomas Graf 34277198f8ceSThomas Graf return err; 34287198f8ceSThomas Graf } 34297198f8ceSThomas Graf 3430101bb229SThomas Graf static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, 3431101bb229SThomas Graf u8 scope, int ifindex) 3432101bb229SThomas Graf { 3433101bb229SThomas Graf struct ifaddrmsg *ifm; 3434101bb229SThomas Graf 3435101bb229SThomas Graf ifm = nlmsg_data(nlh); 3436101bb229SThomas Graf ifm->ifa_family = AF_INET6; 3437101bb229SThomas Graf ifm->ifa_prefixlen = prefixlen; 3438101bb229SThomas Graf ifm->ifa_flags = flags; 3439101bb229SThomas Graf ifm->ifa_scope = scope; 3440101bb229SThomas Graf ifm->ifa_index = ifindex; 3441101bb229SThomas Graf } 3442101bb229SThomas Graf 344385486af0SThomas Graf static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, 344485486af0SThomas Graf unsigned long tstamp, u32 preferred, u32 valid) 344585486af0SThomas Graf { 344685486af0SThomas Graf struct ifa_cacheinfo ci; 344785486af0SThomas Graf 344885486af0SThomas Graf ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100 344985486af0SThomas Graf + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); 345085486af0SThomas Graf ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100 345185486af0SThomas Graf + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); 345285486af0SThomas Graf ci.ifa_prefered = preferred; 345385486af0SThomas Graf ci.ifa_valid = valid; 345485486af0SThomas Graf 345585486af0SThomas Graf return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); 345685486af0SThomas Graf } 345785486af0SThomas Graf 3458101bb229SThomas Graf static inline int rt_scope(int ifa_scope) 3459101bb229SThomas Graf { 3460101bb229SThomas Graf if (ifa_scope & IFA_HOST) 3461101bb229SThomas Graf return RT_SCOPE_HOST; 3462101bb229SThomas Graf else if (ifa_scope & IFA_LINK) 3463101bb229SThomas Graf return RT_SCOPE_LINK; 3464101bb229SThomas Graf else if (ifa_scope & IFA_SITE) 3465101bb229SThomas Graf return RT_SCOPE_SITE; 3466101bb229SThomas Graf else 3467101bb229SThomas Graf return RT_SCOPE_UNIVERSE; 3468101bb229SThomas Graf } 3469101bb229SThomas Graf 34700ab6803bSThomas Graf static inline int inet6_ifaddr_msgsize(void) 34710ab6803bSThomas Graf { 3472339bf98fSThomas Graf return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) 3473339bf98fSThomas Graf + nla_total_size(16) /* IFA_ADDRESS */ 3474339bf98fSThomas Graf + nla_total_size(sizeof(struct ifa_cacheinfo)); 34750ab6803bSThomas Graf } 3476c5396a31SYOSHIFUJI Hideaki 34771da177e4SLinus Torvalds static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, 3478b6544c0bSJamal Hadi Salim u32 pid, u32 seq, int event, unsigned int flags) 34791da177e4SLinus Torvalds { 34801da177e4SLinus Torvalds struct nlmsghdr *nlh; 348185486af0SThomas Graf u32 preferred, valid; 34821da177e4SLinus Torvalds 34830ab6803bSThomas Graf nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); 34840ab6803bSThomas Graf if (nlh == NULL) 348526932566SPatrick McHardy return -EMSGSIZE; 34860ab6803bSThomas Graf 3487101bb229SThomas Graf put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), 3488101bb229SThomas Graf ifa->idev->dev->ifindex); 3489101bb229SThomas Graf 34901da177e4SLinus Torvalds if (!(ifa->flags&IFA_F_PERMANENT)) { 349185486af0SThomas Graf preferred = ifa->prefered_lft; 349285486af0SThomas Graf valid = ifa->valid_lft; 349385486af0SThomas Graf if (preferred != INFINITY_LIFE_TIME) { 34941da177e4SLinus Torvalds long tval = (jiffies - ifa->tstamp)/HZ; 3495a1faa698SJens Rosenboom if (preferred > tval) 349685486af0SThomas Graf preferred -= tval; 3497a1faa698SJens Rosenboom else 3498a1faa698SJens Rosenboom preferred = 0; 349985486af0SThomas Graf if (valid != INFINITY_LIFE_TIME) 350085486af0SThomas Graf valid -= tval; 35011da177e4SLinus Torvalds } 35021da177e4SLinus Torvalds } else { 350385486af0SThomas Graf preferred = INFINITY_LIFE_TIME; 350485486af0SThomas Graf valid = INFINITY_LIFE_TIME; 35051da177e4SLinus Torvalds } 350685486af0SThomas Graf 35070ab6803bSThomas Graf if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || 350826932566SPatrick McHardy put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { 350926932566SPatrick McHardy nlmsg_cancel(skb, nlh); 351026932566SPatrick McHardy return -EMSGSIZE; 351126932566SPatrick McHardy } 351285486af0SThomas Graf 35130ab6803bSThomas Graf return nlmsg_end(skb, nlh); 35141da177e4SLinus Torvalds } 35151da177e4SLinus Torvalds 35161da177e4SLinus Torvalds static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, 3517e431b8c0SJamal Hadi Salim u32 pid, u32 seq, int event, u16 flags) 35181da177e4SLinus Torvalds { 35191da177e4SLinus Torvalds struct nlmsghdr *nlh; 3520101bb229SThomas Graf u8 scope = RT_SCOPE_UNIVERSE; 3521101bb229SThomas Graf int ifindex = ifmca->idev->dev->ifindex; 35221da177e4SLinus Torvalds 35231da177e4SLinus Torvalds if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) 3524101bb229SThomas Graf scope = RT_SCOPE_SITE; 3525101bb229SThomas Graf 35260ab6803bSThomas Graf nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); 35270ab6803bSThomas Graf if (nlh == NULL) 352826932566SPatrick McHardy return -EMSGSIZE; 35290ab6803bSThomas Graf 3530101bb229SThomas Graf put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); 35310ab6803bSThomas Graf if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || 35320ab6803bSThomas Graf put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, 353326932566SPatrick McHardy INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { 353426932566SPatrick McHardy nlmsg_cancel(skb, nlh); 353526932566SPatrick McHardy return -EMSGSIZE; 353626932566SPatrick McHardy } 353785486af0SThomas Graf 35380ab6803bSThomas Graf return nlmsg_end(skb, nlh); 35391da177e4SLinus Torvalds } 35401da177e4SLinus Torvalds 35411da177e4SLinus Torvalds static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, 3542b6544c0bSJamal Hadi Salim u32 pid, u32 seq, int event, unsigned int flags) 35431da177e4SLinus Torvalds { 35441da177e4SLinus Torvalds struct nlmsghdr *nlh; 3545101bb229SThomas Graf u8 scope = RT_SCOPE_UNIVERSE; 3546101bb229SThomas Graf int ifindex = ifaca->aca_idev->dev->ifindex; 35471da177e4SLinus Torvalds 35481da177e4SLinus Torvalds if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) 3549101bb229SThomas Graf scope = RT_SCOPE_SITE; 3550101bb229SThomas Graf 35510ab6803bSThomas Graf nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); 35520ab6803bSThomas Graf if (nlh == NULL) 355326932566SPatrick McHardy return -EMSGSIZE; 35540ab6803bSThomas Graf 3555101bb229SThomas Graf put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); 35560ab6803bSThomas Graf if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || 35570ab6803bSThomas Graf put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, 355826932566SPatrick McHardy INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { 355926932566SPatrick McHardy nlmsg_cancel(skb, nlh); 356026932566SPatrick McHardy return -EMSGSIZE; 356126932566SPatrick McHardy } 356285486af0SThomas Graf 35630ab6803bSThomas Graf return nlmsg_end(skb, nlh); 35641da177e4SLinus Torvalds } 35651da177e4SLinus Torvalds 3566e21e8467SStephen Hemminger enum addr_type_t { 35671da177e4SLinus Torvalds UNICAST_ADDR, 35681da177e4SLinus Torvalds MULTICAST_ADDR, 35691da177e4SLinus Torvalds ANYCAST_ADDR, 35701da177e4SLinus Torvalds }; 35711da177e4SLinus Torvalds 3572234b27c3SEric Dumazet /* called with rcu_read_lock() */ 3573234b27c3SEric Dumazet static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb, 3574234b27c3SEric Dumazet struct netlink_callback *cb, enum addr_type_t type, 3575234b27c3SEric Dumazet int s_ip_idx, int *p_ip_idx) 35761da177e4SLinus Torvalds { 35771da177e4SLinus Torvalds struct ifmcaddr6 *ifmca; 35781da177e4SLinus Torvalds struct ifacaddr6 *ifaca; 3579234b27c3SEric Dumazet int err = 1; 3580234b27c3SEric Dumazet int ip_idx = *p_ip_idx; 35811da177e4SLinus Torvalds 35821da177e4SLinus Torvalds read_lock_bh(&idev->lock); 35831da177e4SLinus Torvalds switch (type) { 3584502a2ffdSstephen hemminger case UNICAST_ADDR: { 3585502a2ffdSstephen hemminger struct inet6_ifaddr *ifa; 3586502a2ffdSstephen hemminger 3587ae9cda5dSYOSHIFUJI Hideaki /* unicast address incl. temp addr */ 3588502a2ffdSstephen hemminger list_for_each_entry(ifa, &idev->addr_list, if_list) { 3589502a2ffdSstephen hemminger if (++ip_idx < s_ip_idx) 35901da177e4SLinus Torvalds continue; 35915d5619b4SYOSHIFUJI Hideaki err = inet6_fill_ifaddr(skb, ifa, 35921da177e4SLinus Torvalds NETLINK_CB(cb->skb).pid, 35935d5619b4SYOSHIFUJI Hideaki cb->nlh->nlmsg_seq, 35945d5619b4SYOSHIFUJI Hideaki RTM_NEWADDR, 35955d5619b4SYOSHIFUJI Hideaki NLM_F_MULTI); 3596bcd32326SEric Dumazet if (err <= 0) 3597bcd32326SEric Dumazet break; 35981da177e4SLinus Torvalds } 35991da177e4SLinus Torvalds break; 3600502a2ffdSstephen hemminger } 36011da177e4SLinus Torvalds case MULTICAST_ADDR: 36021da177e4SLinus Torvalds /* multicast address */ 36031da177e4SLinus Torvalds for (ifmca = idev->mc_list; ifmca; 36041da177e4SLinus Torvalds ifmca = ifmca->next, ip_idx++) { 36051da177e4SLinus Torvalds if (ip_idx < s_ip_idx) 36061da177e4SLinus Torvalds continue; 36075d5619b4SYOSHIFUJI Hideaki err = inet6_fill_ifmcaddr(skb, ifmca, 36081da177e4SLinus Torvalds NETLINK_CB(cb->skb).pid, 36095d5619b4SYOSHIFUJI Hideaki cb->nlh->nlmsg_seq, 36105d5619b4SYOSHIFUJI Hideaki RTM_GETMULTICAST, 36115d5619b4SYOSHIFUJI Hideaki NLM_F_MULTI); 3612bcd32326SEric Dumazet if (err <= 0) 3613bcd32326SEric Dumazet break; 36141da177e4SLinus Torvalds } 36151da177e4SLinus Torvalds break; 36161da177e4SLinus Torvalds case ANYCAST_ADDR: 36171da177e4SLinus Torvalds /* anycast address */ 36181da177e4SLinus Torvalds for (ifaca = idev->ac_list; ifaca; 36191da177e4SLinus Torvalds ifaca = ifaca->aca_next, ip_idx++) { 36201da177e4SLinus Torvalds if (ip_idx < s_ip_idx) 36211da177e4SLinus Torvalds continue; 36225d5619b4SYOSHIFUJI Hideaki err = inet6_fill_ifacaddr(skb, ifaca, 36231da177e4SLinus Torvalds NETLINK_CB(cb->skb).pid, 36245d5619b4SYOSHIFUJI Hideaki cb->nlh->nlmsg_seq, 36255d5619b4SYOSHIFUJI Hideaki RTM_GETANYCAST, 36265d5619b4SYOSHIFUJI Hideaki NLM_F_MULTI); 3627bcd32326SEric Dumazet if (err <= 0) 3628bcd32326SEric Dumazet break; 36291da177e4SLinus Torvalds } 36301da177e4SLinus Torvalds break; 36311da177e4SLinus Torvalds default: 36321da177e4SLinus Torvalds break; 36331da177e4SLinus Torvalds } 36341da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 3635234b27c3SEric Dumazet *p_ip_idx = ip_idx; 3636234b27c3SEric Dumazet return err; 3637234b27c3SEric Dumazet } 36385d5619b4SYOSHIFUJI Hideaki 3639234b27c3SEric Dumazet static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, 3640234b27c3SEric Dumazet enum addr_type_t type) 3641234b27c3SEric Dumazet { 3642234b27c3SEric Dumazet struct net *net = sock_net(skb->sk); 3643234b27c3SEric Dumazet int h, s_h; 3644234b27c3SEric Dumazet int idx, ip_idx; 3645234b27c3SEric Dumazet int s_idx, s_ip_idx; 3646234b27c3SEric Dumazet struct net_device *dev; 3647234b27c3SEric Dumazet struct inet6_dev *idev; 3648234b27c3SEric Dumazet struct hlist_head *head; 3649234b27c3SEric Dumazet struct hlist_node *node; 3650234b27c3SEric Dumazet 3651234b27c3SEric Dumazet s_h = cb->args[0]; 3652234b27c3SEric Dumazet s_idx = idx = cb->args[1]; 3653234b27c3SEric Dumazet s_ip_idx = ip_idx = cb->args[2]; 3654234b27c3SEric Dumazet 3655234b27c3SEric Dumazet rcu_read_lock(); 3656234b27c3SEric Dumazet for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 3657234b27c3SEric Dumazet idx = 0; 3658234b27c3SEric Dumazet head = &net->dev_index_head[h]; 3659234b27c3SEric Dumazet hlist_for_each_entry_rcu(dev, node, head, index_hlist) { 3660234b27c3SEric Dumazet if (idx < s_idx) 3661234b27c3SEric Dumazet goto cont; 36624b97efdfSPatrick McHardy if (h > s_h || idx > s_idx) 3663234b27c3SEric Dumazet s_ip_idx = 0; 3664234b27c3SEric Dumazet ip_idx = 0; 3665e21e8467SStephen Hemminger idev = __in6_dev_get(dev); 3666e21e8467SStephen Hemminger if (!idev) 3667234b27c3SEric Dumazet goto cont; 3668234b27c3SEric Dumazet 3669234b27c3SEric Dumazet if (in6_dump_addrs(idev, skb, cb, type, 3670234b27c3SEric Dumazet s_ip_idx, &ip_idx) <= 0) 3671234b27c3SEric Dumazet goto done; 36727562f876SPavel Emelianov cont: 36737562f876SPavel Emelianov idx++; 36741da177e4SLinus Torvalds } 3675234b27c3SEric Dumazet } 3676234b27c3SEric Dumazet done: 3677234b27c3SEric Dumazet rcu_read_unlock(); 3678234b27c3SEric Dumazet cb->args[0] = h; 3679234b27c3SEric Dumazet cb->args[1] = idx; 3680234b27c3SEric Dumazet cb->args[2] = ip_idx; 3681234b27c3SEric Dumazet 36821da177e4SLinus Torvalds return skb->len; 36831da177e4SLinus Torvalds } 36841da177e4SLinus Torvalds 36851da177e4SLinus Torvalds static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) 36861da177e4SLinus Torvalds { 36871da177e4SLinus Torvalds enum addr_type_t type = UNICAST_ADDR; 3688b854272bSDenis V. Lunev 36891da177e4SLinus Torvalds return inet6_dump_addr(skb, cb, type); 36901da177e4SLinus Torvalds } 36911da177e4SLinus Torvalds 36921da177e4SLinus Torvalds static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) 36931da177e4SLinus Torvalds { 36941da177e4SLinus Torvalds enum addr_type_t type = MULTICAST_ADDR; 3695b854272bSDenis V. Lunev 36961da177e4SLinus Torvalds return inet6_dump_addr(skb, cb, type); 36971da177e4SLinus Torvalds } 36981da177e4SLinus Torvalds 36991da177e4SLinus Torvalds 37001da177e4SLinus Torvalds static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) 37011da177e4SLinus Torvalds { 37021da177e4SLinus Torvalds enum addr_type_t type = ANYCAST_ADDR; 3703b854272bSDenis V. Lunev 37041da177e4SLinus Torvalds return inet6_dump_addr(skb, cb, type); 37051da177e4SLinus Torvalds } 37061da177e4SLinus Torvalds 37071b29fc2cSThomas Graf static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh, 37081b29fc2cSThomas Graf void *arg) 37096c223828SNoriaki TAKAMIYA { 37103b1e0a65SYOSHIFUJI Hideaki struct net *net = sock_net(in_skb->sk); 37111b29fc2cSThomas Graf struct ifaddrmsg *ifm; 37121b29fc2cSThomas Graf struct nlattr *tb[IFA_MAX+1]; 37136c223828SNoriaki TAKAMIYA struct in6_addr *addr = NULL; 37146c223828SNoriaki TAKAMIYA struct net_device *dev = NULL; 37156c223828SNoriaki TAKAMIYA struct inet6_ifaddr *ifa; 37166c223828SNoriaki TAKAMIYA struct sk_buff *skb; 37176c223828SNoriaki TAKAMIYA int err; 37186c223828SNoriaki TAKAMIYA 37191b29fc2cSThomas Graf err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); 37201b29fc2cSThomas Graf if (err < 0) 37211b29fc2cSThomas Graf goto errout; 37226c223828SNoriaki TAKAMIYA 37231b29fc2cSThomas Graf addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); 37241b29fc2cSThomas Graf if (addr == NULL) { 37251b29fc2cSThomas Graf err = -EINVAL; 37261b29fc2cSThomas Graf goto errout; 37271b29fc2cSThomas Graf } 37281b29fc2cSThomas Graf 37291b29fc2cSThomas Graf ifm = nlmsg_data(nlh); 37306c223828SNoriaki TAKAMIYA if (ifm->ifa_index) 37316fda7350SBenjamin Thery dev = __dev_get_by_index(net, ifm->ifa_index); 37326c223828SNoriaki TAKAMIYA 3733e21e8467SStephen Hemminger ifa = ipv6_get_ifaddr(net, addr, dev, 1); 3734e21e8467SStephen Hemminger if (!ifa) { 37351b29fc2cSThomas Graf err = -EADDRNOTAVAIL; 37361b29fc2cSThomas Graf goto errout; 37376c223828SNoriaki TAKAMIYA } 37386c223828SNoriaki TAKAMIYA 3739e21e8467SStephen Hemminger skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL); 3740e21e8467SStephen Hemminger if (!skb) { 37411b29fc2cSThomas Graf err = -ENOBUFS; 37421b29fc2cSThomas Graf goto errout_ifa; 37431b29fc2cSThomas Graf } 37441b29fc2cSThomas Graf 37456c223828SNoriaki TAKAMIYA err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, 37466c223828SNoriaki TAKAMIYA nlh->nlmsg_seq, RTM_NEWADDR, 0); 374726932566SPatrick McHardy if (err < 0) { 374826932566SPatrick McHardy /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ 374926932566SPatrick McHardy WARN_ON(err == -EMSGSIZE); 375026932566SPatrick McHardy kfree_skb(skb); 375126932566SPatrick McHardy goto errout_ifa; 375226932566SPatrick McHardy } 37536fda7350SBenjamin Thery err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid); 37541b29fc2cSThomas Graf errout_ifa: 37556c223828SNoriaki TAKAMIYA in6_ifa_put(ifa); 37561b29fc2cSThomas Graf errout: 37576c223828SNoriaki TAKAMIYA return err; 37586c223828SNoriaki TAKAMIYA } 37596c223828SNoriaki TAKAMIYA 37601da177e4SLinus Torvalds static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) 37611da177e4SLinus Torvalds { 37621da177e4SLinus Torvalds struct sk_buff *skb; 3763c346dca1SYOSHIFUJI Hideaki struct net *net = dev_net(ifa->idev->dev); 37645d620266SThomas Graf int err = -ENOBUFS; 37651da177e4SLinus Torvalds 37660ab6803bSThomas Graf skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); 37675d620266SThomas Graf if (skb == NULL) 37685d620266SThomas Graf goto errout; 37695d620266SThomas Graf 37705d620266SThomas Graf err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); 377126932566SPatrick McHardy if (err < 0) { 377226932566SPatrick McHardy /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ 377326932566SPatrick McHardy WARN_ON(err == -EMSGSIZE); 377426932566SPatrick McHardy kfree_skb(skb); 377526932566SPatrick McHardy goto errout; 377626932566SPatrick McHardy } 37771ce85fe4SPablo Neira Ayuso rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); 37781ce85fe4SPablo Neira Ayuso return; 37795d620266SThomas Graf errout: 37805d620266SThomas Graf if (err < 0) 37816fda7350SBenjamin Thery rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); 37821da177e4SLinus Torvalds } 37831da177e4SLinus Torvalds 3784b6f99a21SDave Jones static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, 37851da177e4SLinus Torvalds __s32 *array, int bytes) 37861da177e4SLinus Torvalds { 378704561c1fSThomas Graf BUG_ON(bytes < (DEVCONF_MAX * 4)); 378804561c1fSThomas Graf 37891da177e4SLinus Torvalds memset(array, 0, bytes); 37901da177e4SLinus Torvalds array[DEVCONF_FORWARDING] = cnf->forwarding; 37911da177e4SLinus Torvalds array[DEVCONF_HOPLIMIT] = cnf->hop_limit; 37921da177e4SLinus Torvalds array[DEVCONF_MTU6] = cnf->mtu6; 37931da177e4SLinus Torvalds array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; 37941da177e4SLinus Torvalds array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; 37951da177e4SLinus Torvalds array[DEVCONF_AUTOCONF] = cnf->autoconf; 37961da177e4SLinus Torvalds array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; 37971da177e4SLinus Torvalds array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; 37981da177e4SLinus Torvalds array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; 37991da177e4SLinus Torvalds array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; 38001da177e4SLinus Torvalds array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; 38011da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 38021da177e4SLinus Torvalds array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; 38031da177e4SLinus Torvalds array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; 38041da177e4SLinus Torvalds array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; 38051da177e4SLinus Torvalds array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; 38061da177e4SLinus Torvalds array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; 38071da177e4SLinus Torvalds #endif 38081da177e4SLinus Torvalds array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; 380965f5c7c1SYOSHIFUJI Hideaki array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; 3810c4fd30ebSYOSHIFUJI Hideaki array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; 3811930d6ff2SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_ROUTER_PREF 3812930d6ff2SYOSHIFUJI Hideaki array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; 381352e16356SYOSHIFUJI Hideaki array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval; 3814fa03ef38SNeil Horman #ifdef CONFIG_IPV6_ROUTE_INFO 381509c884d4SYOSHIFUJI Hideaki array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; 381609c884d4SYOSHIFUJI Hideaki #endif 3817930d6ff2SYOSHIFUJI Hideaki #endif 3818fbea49e1SYOSHIFUJI Hideaki array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; 38190bcbc926SYOSHIFUJI Hideaki array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; 382095c385b4SNeil Horman #ifdef CONFIG_IPV6_OPTIMISTIC_DAD 382195c385b4SNeil Horman array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; 382295c385b4SNeil Horman #endif 38237bc570c8SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_MROUTE 38247bc570c8SYOSHIFUJI Hideaki array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; 38257bc570c8SYOSHIFUJI Hideaki #endif 3826778d80beSYOSHIFUJI Hideaki array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; 38271b34be74SYOSHIFUJI Hideaki array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; 3828c3faca05SCosmin Ratiu array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao; 38291da177e4SLinus Torvalds } 38301da177e4SLinus Torvalds 3831339bf98fSThomas Graf static inline size_t inet6_if_nlmsg_size(void) 3832339bf98fSThomas Graf { 3833339bf98fSThomas Graf return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 3834339bf98fSThomas Graf + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 3835339bf98fSThomas Graf + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 3836339bf98fSThomas Graf + nla_total_size(4) /* IFLA_MTU */ 3837339bf98fSThomas Graf + nla_total_size(4) /* IFLA_LINK */ 3838339bf98fSThomas Graf + nla_total_size( /* IFLA_PROTINFO */ 3839339bf98fSThomas Graf nla_total_size(4) /* IFLA_INET6_FLAGS */ 3840339bf98fSThomas Graf + nla_total_size(sizeof(struct ifla_cacheinfo)) 3841339bf98fSThomas Graf + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ 3842bf99f1bdSYOSHIFUJI Hideaki + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ 3843bf99f1bdSYOSHIFUJI Hideaki + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ 3844339bf98fSThomas Graf ); 3845339bf98fSThomas Graf } 3846c5396a31SYOSHIFUJI Hideaki 38477d720c3eSTejun Heo static inline void __snmp6_fill_stats(u64 *stats, void __percpu **mib, 38487d720c3eSTejun Heo int items, int bytes) 38497f7d9a6bSHerbert Xu { 38507f7d9a6bSHerbert Xu int i; 38517f7d9a6bSHerbert Xu int pad = bytes - sizeof(u64) * items; 38527f7d9a6bSHerbert Xu BUG_ON(pad < 0); 38537f7d9a6bSHerbert Xu 38547f7d9a6bSHerbert Xu /* Use put_unaligned() because stats may not be aligned for u64. */ 38557f7d9a6bSHerbert Xu put_unaligned(items, &stats[0]); 38567f7d9a6bSHerbert Xu for (i = 1; i < items; i++) 38577f7d9a6bSHerbert Xu put_unaligned(snmp_fold_field(mib, i), &stats[i]); 38587f7d9a6bSHerbert Xu 38597f7d9a6bSHerbert Xu memset(&stats[items], 0, pad); 38607f7d9a6bSHerbert Xu } 38617f7d9a6bSHerbert Xu 38627f7d9a6bSHerbert Xu static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, 38637f7d9a6bSHerbert Xu int bytes) 38647f7d9a6bSHerbert Xu { 38657f7d9a6bSHerbert Xu switch (attrtype) { 38667f7d9a6bSHerbert Xu case IFLA_INET6_STATS: 38677d720c3eSTejun Heo __snmp6_fill_stats(stats, (void __percpu **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes); 38687f7d9a6bSHerbert Xu break; 38697f7d9a6bSHerbert Xu case IFLA_INET6_ICMP6STATS: 38707d720c3eSTejun Heo __snmp6_fill_stats(stats, (void __percpu **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes); 38717f7d9a6bSHerbert Xu break; 38727f7d9a6bSHerbert Xu } 38737f7d9a6bSHerbert Xu } 38747f7d9a6bSHerbert Xu 38751da177e4SLinus Torvalds static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, 3876b6544c0bSJamal Hadi Salim u32 pid, u32 seq, int event, unsigned int flags) 38771da177e4SLinus Torvalds { 38781da177e4SLinus Torvalds struct net_device *dev = idev->dev; 3879bf99f1bdSYOSHIFUJI Hideaki struct nlattr *nla; 388004561c1fSThomas Graf struct ifinfomsg *hdr; 38811da177e4SLinus Torvalds struct nlmsghdr *nlh; 388204561c1fSThomas Graf void *protoinfo; 38831da177e4SLinus Torvalds struct ifla_cacheinfo ci; 38841da177e4SLinus Torvalds 388504561c1fSThomas Graf nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); 388604561c1fSThomas Graf if (nlh == NULL) 388726932566SPatrick McHardy return -EMSGSIZE; 38881da177e4SLinus Torvalds 388904561c1fSThomas Graf hdr = nlmsg_data(nlh); 389004561c1fSThomas Graf hdr->ifi_family = AF_INET6; 389104561c1fSThomas Graf hdr->__ifi_pad = 0; 389204561c1fSThomas Graf hdr->ifi_type = dev->type; 389304561c1fSThomas Graf hdr->ifi_index = dev->ifindex; 389404561c1fSThomas Graf hdr->ifi_flags = dev_get_flags(dev); 389504561c1fSThomas Graf hdr->ifi_change = 0; 389604561c1fSThomas Graf 389704561c1fSThomas Graf NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); 38981da177e4SLinus Torvalds 38991da177e4SLinus Torvalds if (dev->addr_len) 390004561c1fSThomas Graf NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); 39011da177e4SLinus Torvalds 390204561c1fSThomas Graf NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); 39031da177e4SLinus Torvalds if (dev->ifindex != dev->iflink) 390404561c1fSThomas Graf NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); 39051da177e4SLinus Torvalds 390604561c1fSThomas Graf protoinfo = nla_nest_start(skb, IFLA_PROTINFO); 390704561c1fSThomas Graf if (protoinfo == NULL) 390804561c1fSThomas Graf goto nla_put_failure; 39091da177e4SLinus Torvalds 391004561c1fSThomas Graf NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags); 39111da177e4SLinus Torvalds 39121da177e4SLinus Torvalds ci.max_reasm_len = IPV6_MAXPLEN; 39131da177e4SLinus Torvalds ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 39141da177e4SLinus Torvalds + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); 39151da177e4SLinus Torvalds ci.reachable_time = idev->nd_parms->reachable_time; 39161da177e4SLinus Torvalds ci.retrans_time = idev->nd_parms->retrans_time; 391704561c1fSThomas Graf NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); 39181da177e4SLinus Torvalds 3919bf99f1bdSYOSHIFUJI Hideaki nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); 3920bf99f1bdSYOSHIFUJI Hideaki if (nla == NULL) 392104561c1fSThomas Graf goto nla_put_failure; 3922bf99f1bdSYOSHIFUJI Hideaki ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); 39231da177e4SLinus Torvalds 3924bf99f1bdSYOSHIFUJI Hideaki /* XXX - MC not implemented */ 3925bf99f1bdSYOSHIFUJI Hideaki 3926bf99f1bdSYOSHIFUJI Hideaki nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); 3927bf99f1bdSYOSHIFUJI Hideaki if (nla == NULL) 3928bf99f1bdSYOSHIFUJI Hideaki goto nla_put_failure; 3929bf99f1bdSYOSHIFUJI Hideaki snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); 3930bf99f1bdSYOSHIFUJI Hideaki 3931bf99f1bdSYOSHIFUJI Hideaki nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); 3932bf99f1bdSYOSHIFUJI Hideaki if (nla == NULL) 3933bf99f1bdSYOSHIFUJI Hideaki goto nla_put_failure; 3934bf99f1bdSYOSHIFUJI Hideaki snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); 39351da177e4SLinus Torvalds 393604561c1fSThomas Graf nla_nest_end(skb, protoinfo); 393704561c1fSThomas Graf return nlmsg_end(skb, nlh); 39381da177e4SLinus Torvalds 393904561c1fSThomas Graf nla_put_failure: 394026932566SPatrick McHardy nlmsg_cancel(skb, nlh); 394126932566SPatrick McHardy return -EMSGSIZE; 39421da177e4SLinus Torvalds } 39431da177e4SLinus Torvalds 39441da177e4SLinus Torvalds static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) 39451da177e4SLinus Torvalds { 39463b1e0a65SYOSHIFUJI Hideaki struct net *net = sock_net(skb->sk); 394784d2697dSEric Dumazet int h, s_h; 3948434a8a58SDavid S. Miller int idx = 0, s_idx; 39491da177e4SLinus Torvalds struct net_device *dev; 39501da177e4SLinus Torvalds struct inet6_dev *idev; 395184d2697dSEric Dumazet struct hlist_head *head; 395284d2697dSEric Dumazet struct hlist_node *node; 39531da177e4SLinus Torvalds 395484d2697dSEric Dumazet s_h = cb->args[0]; 395584d2697dSEric Dumazet s_idx = cb->args[1]; 395684d2697dSEric Dumazet 395784d2697dSEric Dumazet rcu_read_lock(); 395884d2697dSEric Dumazet for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 39597562f876SPavel Emelianov idx = 0; 396084d2697dSEric Dumazet head = &net->dev_index_head[h]; 396184d2697dSEric Dumazet hlist_for_each_entry_rcu(dev, node, head, index_hlist) { 39621da177e4SLinus Torvalds if (idx < s_idx) 39637562f876SPavel Emelianov goto cont; 396484d2697dSEric Dumazet idev = __in6_dev_get(dev); 396584d2697dSEric Dumazet if (!idev) 39667562f876SPavel Emelianov goto cont; 396784d2697dSEric Dumazet if (inet6_fill_ifinfo(skb, idev, 396884d2697dSEric Dumazet NETLINK_CB(cb->skb).pid, 396984d2697dSEric Dumazet cb->nlh->nlmsg_seq, 397084d2697dSEric Dumazet RTM_NEWLINK, NLM_F_MULTI) <= 0) 397184d2697dSEric Dumazet goto out; 39727562f876SPavel Emelianov cont: 39737562f876SPavel Emelianov idx++; 39741da177e4SLinus Torvalds } 397584d2697dSEric Dumazet } 397684d2697dSEric Dumazet out: 397784d2697dSEric Dumazet rcu_read_unlock(); 397884d2697dSEric Dumazet cb->args[1] = idx; 397984d2697dSEric Dumazet cb->args[0] = h; 39801da177e4SLinus Torvalds 39811da177e4SLinus Torvalds return skb->len; 39821da177e4SLinus Torvalds } 39831da177e4SLinus Torvalds 39841da177e4SLinus Torvalds void inet6_ifinfo_notify(int event, struct inet6_dev *idev) 39851da177e4SLinus Torvalds { 39861da177e4SLinus Torvalds struct sk_buff *skb; 3987c346dca1SYOSHIFUJI Hideaki struct net *net = dev_net(idev->dev); 39888d7a76c9SThomas Graf int err = -ENOBUFS; 39891da177e4SLinus Torvalds 3990339bf98fSThomas Graf skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); 39918d7a76c9SThomas Graf if (skb == NULL) 39928d7a76c9SThomas Graf goto errout; 39938d7a76c9SThomas Graf 39948d7a76c9SThomas Graf err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); 399526932566SPatrick McHardy if (err < 0) { 399626932566SPatrick McHardy /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ 399726932566SPatrick McHardy WARN_ON(err == -EMSGSIZE); 399826932566SPatrick McHardy kfree_skb(skb); 399926932566SPatrick McHardy goto errout; 400026932566SPatrick McHardy } 40011ce85fe4SPablo Neira Ayuso rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); 40021ce85fe4SPablo Neira Ayuso return; 40038d7a76c9SThomas Graf errout: 40048d7a76c9SThomas Graf if (err < 0) 40056fda7350SBenjamin Thery rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); 40061da177e4SLinus Torvalds } 40071da177e4SLinus Torvalds 4008339bf98fSThomas Graf static inline size_t inet6_prefix_nlmsg_size(void) 4009339bf98fSThomas Graf { 4010339bf98fSThomas Graf return NLMSG_ALIGN(sizeof(struct prefixmsg)) 4011339bf98fSThomas Graf + nla_total_size(sizeof(struct in6_addr)) 4012339bf98fSThomas Graf + nla_total_size(sizeof(struct prefix_cacheinfo)); 4013339bf98fSThomas Graf } 4014c5396a31SYOSHIFUJI Hideaki 40151da177e4SLinus Torvalds static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, 4016b6544c0bSJamal Hadi Salim struct prefix_info *pinfo, u32 pid, u32 seq, 4017b6544c0bSJamal Hadi Salim int event, unsigned int flags) 40181da177e4SLinus Torvalds { 40191da177e4SLinus Torvalds struct prefixmsg *pmsg; 40201da177e4SLinus Torvalds struct nlmsghdr *nlh; 40211da177e4SLinus Torvalds struct prefix_cacheinfo ci; 40221da177e4SLinus Torvalds 40236051e2f4SThomas Graf nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags); 40246051e2f4SThomas Graf if (nlh == NULL) 402526932566SPatrick McHardy return -EMSGSIZE; 40266051e2f4SThomas Graf 40276051e2f4SThomas Graf pmsg = nlmsg_data(nlh); 40281da177e4SLinus Torvalds pmsg->prefix_family = AF_INET6; 40298a47077aSPatrick McHardy pmsg->prefix_pad1 = 0; 40308a47077aSPatrick McHardy pmsg->prefix_pad2 = 0; 40311da177e4SLinus Torvalds pmsg->prefix_ifindex = idev->dev->ifindex; 40321da177e4SLinus Torvalds pmsg->prefix_len = pinfo->prefix_len; 40331da177e4SLinus Torvalds pmsg->prefix_type = pinfo->type; 40348a47077aSPatrick McHardy pmsg->prefix_pad3 = 0; 40351da177e4SLinus Torvalds pmsg->prefix_flags = 0; 40361da177e4SLinus Torvalds if (pinfo->onlink) 40371da177e4SLinus Torvalds pmsg->prefix_flags |= IF_PREFIX_ONLINK; 40381da177e4SLinus Torvalds if (pinfo->autoconf) 40391da177e4SLinus Torvalds pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; 40401da177e4SLinus Torvalds 40416051e2f4SThomas Graf NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); 40421da177e4SLinus Torvalds 40431da177e4SLinus Torvalds ci.preferred_time = ntohl(pinfo->prefered); 40441da177e4SLinus Torvalds ci.valid_time = ntohl(pinfo->valid); 40456051e2f4SThomas Graf NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); 40461da177e4SLinus Torvalds 40476051e2f4SThomas Graf return nlmsg_end(skb, nlh); 40481da177e4SLinus Torvalds 40496051e2f4SThomas Graf nla_put_failure: 405026932566SPatrick McHardy nlmsg_cancel(skb, nlh); 405126932566SPatrick McHardy return -EMSGSIZE; 40521da177e4SLinus Torvalds } 40531da177e4SLinus Torvalds 40541da177e4SLinus Torvalds static void inet6_prefix_notify(int event, struct inet6_dev *idev, 40551da177e4SLinus Torvalds struct prefix_info *pinfo) 40561da177e4SLinus Torvalds { 40571da177e4SLinus Torvalds struct sk_buff *skb; 4058c346dca1SYOSHIFUJI Hideaki struct net *net = dev_net(idev->dev); 40598c384bfaSThomas Graf int err = -ENOBUFS; 40601da177e4SLinus Torvalds 4061339bf98fSThomas Graf skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); 40628c384bfaSThomas Graf if (skb == NULL) 40638c384bfaSThomas Graf goto errout; 40648c384bfaSThomas Graf 40658c384bfaSThomas Graf err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); 406626932566SPatrick McHardy if (err < 0) { 406726932566SPatrick McHardy /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ 406826932566SPatrick McHardy WARN_ON(err == -EMSGSIZE); 406926932566SPatrick McHardy kfree_skb(skb); 407026932566SPatrick McHardy goto errout; 407126932566SPatrick McHardy } 40721ce85fe4SPablo Neira Ayuso rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); 40731ce85fe4SPablo Neira Ayuso return; 40748c384bfaSThomas Graf errout: 40758c384bfaSThomas Graf if (err < 0) 40766fda7350SBenjamin Thery rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); 40771da177e4SLinus Torvalds } 40781da177e4SLinus Torvalds 40791da177e4SLinus Torvalds static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) 40801da177e4SLinus Torvalds { 40811da177e4SLinus Torvalds inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); 40821da177e4SLinus Torvalds 40831da177e4SLinus Torvalds switch (event) { 40841da177e4SLinus Torvalds case RTM_NEWADDR: 408595c385b4SNeil Horman /* 408695c385b4SNeil Horman * If the address was optimistic 408795c385b4SNeil Horman * we inserted the route at the start of 408895c385b4SNeil Horman * our DAD process, so we don't need 408995c385b4SNeil Horman * to do it again 409095c385b4SNeil Horman */ 409195c385b4SNeil Horman if (!(ifp->rt->rt6i_node)) 409240e22e8fSThomas Graf ip6_ins_rt(ifp->rt); 40931da177e4SLinus Torvalds if (ifp->idev->cnf.forwarding) 40941da177e4SLinus Torvalds addrconf_join_anycast(ifp); 40951da177e4SLinus Torvalds break; 40961da177e4SLinus Torvalds case RTM_DELADDR: 40971da177e4SLinus Torvalds if (ifp->idev->cnf.forwarding) 40981da177e4SLinus Torvalds addrconf_leave_anycast(ifp); 40991da177e4SLinus Torvalds addrconf_leave_solict(ifp->idev, &ifp->addr); 41001da177e4SLinus Torvalds dst_hold(&ifp->rt->u.dst); 410193fa159aSstephen hemminger 4102e9d3e084SHerbert Xu if (ifp->state == INET6_IFADDR_STATE_DEAD && 4103e9d3e084SHerbert Xu ip6_del_rt(ifp->rt)) 41041da177e4SLinus Torvalds dst_free(&ifp->rt->u.dst); 41051da177e4SLinus Torvalds break; 41061da177e4SLinus Torvalds } 41071da177e4SLinus Torvalds } 41081da177e4SLinus Torvalds 41091da177e4SLinus Torvalds static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) 41101da177e4SLinus Torvalds { 41118814c4b5SYOSHIFUJI Hideaki rcu_read_lock_bh(); 41121da177e4SLinus Torvalds if (likely(ifp->idev->dead == 0)) 41131da177e4SLinus Torvalds __ipv6_ifa_notify(event, ifp); 41148814c4b5SYOSHIFUJI Hideaki rcu_read_unlock_bh(); 41151da177e4SLinus Torvalds } 41161da177e4SLinus Torvalds 41171da177e4SLinus Torvalds #ifdef CONFIG_SYSCTL 41181da177e4SLinus Torvalds 41191da177e4SLinus Torvalds static 41208d65af78SAlexey Dobriyan int addrconf_sysctl_forward(ctl_table *ctl, int write, 41211da177e4SLinus Torvalds void __user *buffer, size_t *lenp, loff_t *ppos) 41221da177e4SLinus Torvalds { 41231da177e4SLinus Torvalds int *valp = ctl->data; 41241da177e4SLinus Torvalds int val = *valp; 412588af182eSEric W. Biederman loff_t pos = *ppos; 41261da177e4SLinus Torvalds int ret; 41271da177e4SLinus Torvalds 41288d65af78SAlexey Dobriyan ret = proc_dointvec(ctl, write, buffer, lenp, ppos); 41291da177e4SLinus Torvalds 4130c8fecf22SPavel Emelyanov if (write) 4131b325fddbSStephen Hemminger ret = addrconf_fixup_forwarding(ctl, valp, val); 413288af182eSEric W. Biederman if (ret) 413388af182eSEric W. Biederman *ppos = pos; 41341da177e4SLinus Torvalds return ret; 41351da177e4SLinus Torvalds } 41361da177e4SLinus Torvalds 413756d417b1SBrian Haley static void dev_disable_change(struct inet6_dev *idev) 413856d417b1SBrian Haley { 413956d417b1SBrian Haley if (!idev || !idev->dev) 414056d417b1SBrian Haley return; 414156d417b1SBrian Haley 414256d417b1SBrian Haley if (idev->cnf.disable_ipv6) 414356d417b1SBrian Haley addrconf_notify(NULL, NETDEV_DOWN, idev->dev); 414456d417b1SBrian Haley else 414556d417b1SBrian Haley addrconf_notify(NULL, NETDEV_UP, idev->dev); 414656d417b1SBrian Haley } 414756d417b1SBrian Haley 414856d417b1SBrian Haley static void addrconf_disable_change(struct net *net, __s32 newf) 414956d417b1SBrian Haley { 415056d417b1SBrian Haley struct net_device *dev; 415156d417b1SBrian Haley struct inet6_dev *idev; 415256d417b1SBrian Haley 415356d417b1SBrian Haley rcu_read_lock(); 4154c6d14c84SEric Dumazet for_each_netdev_rcu(net, dev) { 415556d417b1SBrian Haley idev = __in6_dev_get(dev); 415656d417b1SBrian Haley if (idev) { 415756d417b1SBrian Haley int changed = (!idev->cnf.disable_ipv6) ^ (!newf); 415856d417b1SBrian Haley idev->cnf.disable_ipv6 = newf; 415956d417b1SBrian Haley if (changed) 416056d417b1SBrian Haley dev_disable_change(idev); 416156d417b1SBrian Haley } 416256d417b1SBrian Haley } 4163c6d14c84SEric Dumazet rcu_read_unlock(); 416456d417b1SBrian Haley } 416556d417b1SBrian Haley 416656d417b1SBrian Haley static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int old) 416756d417b1SBrian Haley { 416856d417b1SBrian Haley struct net *net; 416956d417b1SBrian Haley 417056d417b1SBrian Haley net = (struct net *)table->extra2; 417156d417b1SBrian Haley 417256d417b1SBrian Haley if (p == &net->ipv6.devconf_dflt->disable_ipv6) 417356d417b1SBrian Haley return 0; 417456d417b1SBrian Haley 417588af182eSEric W. Biederman if (!rtnl_trylock()) { 417688af182eSEric W. Biederman /* Restore the original values before restarting */ 417788af182eSEric W. Biederman *p = old; 417856d417b1SBrian Haley return restart_syscall(); 417988af182eSEric W. Biederman } 418056d417b1SBrian Haley 418156d417b1SBrian Haley if (p == &net->ipv6.devconf_all->disable_ipv6) { 418256d417b1SBrian Haley __s32 newf = net->ipv6.devconf_all->disable_ipv6; 418356d417b1SBrian Haley net->ipv6.devconf_dflt->disable_ipv6 = newf; 418456d417b1SBrian Haley addrconf_disable_change(net, newf); 418556d417b1SBrian Haley } else if ((!*p) ^ (!old)) 418656d417b1SBrian Haley dev_disable_change((struct inet6_dev *)table->extra1); 418756d417b1SBrian Haley 418856d417b1SBrian Haley rtnl_unlock(); 418956d417b1SBrian Haley return 0; 419056d417b1SBrian Haley } 419156d417b1SBrian Haley 419256d417b1SBrian Haley static 41938d65af78SAlexey Dobriyan int addrconf_sysctl_disable(ctl_table *ctl, int write, 419456d417b1SBrian Haley void __user *buffer, size_t *lenp, loff_t *ppos) 419556d417b1SBrian Haley { 419656d417b1SBrian Haley int *valp = ctl->data; 419756d417b1SBrian Haley int val = *valp; 419888af182eSEric W. Biederman loff_t pos = *ppos; 419956d417b1SBrian Haley int ret; 420056d417b1SBrian Haley 42018d65af78SAlexey Dobriyan ret = proc_dointvec(ctl, write, buffer, lenp, ppos); 420256d417b1SBrian Haley 420356d417b1SBrian Haley if (write) 420456d417b1SBrian Haley ret = addrconf_disable_ipv6(ctl, valp, val); 420588af182eSEric W. Biederman if (ret) 420688af182eSEric W. Biederman *ppos = pos; 420756d417b1SBrian Haley return ret; 420856d417b1SBrian Haley } 420956d417b1SBrian Haley 42101da177e4SLinus Torvalds static struct addrconf_sysctl_table 42111da177e4SLinus Torvalds { 42121da177e4SLinus Torvalds struct ctl_table_header *sysctl_header; 4213f6a07b29SYOSHIFUJI Hideaki ctl_table addrconf_vars[DEVCONF_MAX+1]; 42141dab6222SPavel Emelyanov char *dev_name; 4215ab32ea5dSBrian Haley } addrconf_sysctl __read_mostly = { 42161da177e4SLinus Torvalds .sysctl_header = NULL, 42171da177e4SLinus Torvalds .addrconf_vars = { 42181da177e4SLinus Torvalds { 42191da177e4SLinus Torvalds .procname = "forwarding", 42201da177e4SLinus Torvalds .data = &ipv6_devconf.forwarding, 42211da177e4SLinus Torvalds .maxlen = sizeof(int), 42221da177e4SLinus Torvalds .mode = 0644, 42236d9f239aSAlexey Dobriyan .proc_handler = addrconf_sysctl_forward, 42241da177e4SLinus Torvalds }, 42251da177e4SLinus Torvalds { 42261da177e4SLinus Torvalds .procname = "hop_limit", 42271da177e4SLinus Torvalds .data = &ipv6_devconf.hop_limit, 42281da177e4SLinus Torvalds .maxlen = sizeof(int), 42291da177e4SLinus Torvalds .mode = 0644, 42301da177e4SLinus Torvalds .proc_handler = proc_dointvec, 42311da177e4SLinus Torvalds }, 42321da177e4SLinus Torvalds { 42331da177e4SLinus Torvalds .procname = "mtu", 42341da177e4SLinus Torvalds .data = &ipv6_devconf.mtu6, 42351da177e4SLinus Torvalds .maxlen = sizeof(int), 42361da177e4SLinus Torvalds .mode = 0644, 42376d9f239aSAlexey Dobriyan .proc_handler = proc_dointvec, 42381da177e4SLinus Torvalds }, 42391da177e4SLinus Torvalds { 42401da177e4SLinus Torvalds .procname = "accept_ra", 42411da177e4SLinus Torvalds .data = &ipv6_devconf.accept_ra, 42421da177e4SLinus Torvalds .maxlen = sizeof(int), 42431da177e4SLinus Torvalds .mode = 0644, 42446d9f239aSAlexey Dobriyan .proc_handler = proc_dointvec, 42451da177e4SLinus Torvalds }, 42461da177e4SLinus Torvalds { 42471da177e4SLinus Torvalds .procname = "accept_redirects", 42481da177e4SLinus Torvalds .data = &ipv6_devconf.accept_redirects, 42491da177e4SLinus Torvalds .maxlen = sizeof(int), 42501da177e4SLinus Torvalds .mode = 0644, 42516d9f239aSAlexey Dobriyan .proc_handler = proc_dointvec, 42521da177e4SLinus Torvalds }, 42531da177e4SLinus Torvalds { 42541da177e4SLinus Torvalds .procname = "autoconf", 42551da177e4SLinus Torvalds .data = &ipv6_devconf.autoconf, 42561da177e4SLinus Torvalds .maxlen = sizeof(int), 42571da177e4SLinus Torvalds .mode = 0644, 42586d9f239aSAlexey Dobriyan .proc_handler = proc_dointvec, 42591da177e4SLinus Torvalds }, 42601da177e4SLinus Torvalds { 42611da177e4SLinus Torvalds .procname = "dad_transmits", 42621da177e4SLinus Torvalds .data = &ipv6_devconf.dad_transmits, 42631da177e4SLinus Torvalds .maxlen = sizeof(int), 42641da177e4SLinus Torvalds .mode = 0644, 42656d9f239aSAlexey Dobriyan .proc_handler = proc_dointvec, 42661da177e4SLinus Torvalds }, 42671da177e4SLinus Torvalds { 42681da177e4SLinus Torvalds .procname = "router_solicitations", 42691da177e4SLinus Torvalds .data = &ipv6_devconf.rtr_solicits, 42701da177e4SLinus Torvalds .maxlen = sizeof(int), 42711da177e4SLinus Torvalds .mode = 0644, 42726d9f239aSAlexey Dobriyan .proc_handler = proc_dointvec, 42731da177e4SLinus Torvalds }, 42741da177e4SLinus Torvalds { 42751da177e4SLinus Torvalds .procname = "router_solicitation_interval", 42761da177e4SLinus Torvalds .data = &ipv6_devconf.rtr_solicit_interval, 42771da177e4SLinus Torvalds .maxlen = sizeof(int), 42781da177e4SLinus Torvalds .mode = 0644, 42796d9f239aSAlexey Dobriyan .proc_handler = proc_dointvec_jiffies, 42801da177e4SLinus Torvalds }, 42811da177e4SLinus Torvalds { 42821da177e4SLinus Torvalds .procname = "router_solicitation_delay", 42831da177e4SLinus Torvalds .data = &ipv6_devconf.rtr_solicit_delay, 42841da177e4SLinus Torvalds .maxlen = sizeof(int), 42851da177e4SLinus Torvalds .mode = 0644, 42866d9f239aSAlexey Dobriyan .proc_handler = proc_dointvec_jiffies, 42871da177e4SLinus Torvalds }, 42881da177e4SLinus Torvalds { 42891da177e4SLinus Torvalds .procname = "force_mld_version", 42901da177e4SLinus Torvalds .data = &ipv6_devconf.force_mld_version, 42911da177e4SLinus Torvalds .maxlen = sizeof(int), 42921da177e4SLinus Torvalds .mode = 0644, 42936d9f239aSAlexey Dobriyan .proc_handler = proc_dointvec, 42941da177e4SLinus Torvalds }, 42951da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 42961da177e4SLinus Torvalds { 42971da177e4SLinus Torvalds .procname = "use_tempaddr", 42981da177e4SLinus Torvalds .data = &ipv6_devconf.use_tempaddr, 42991da177e4SLinus Torvalds .maxlen = sizeof(int), 43001da177e4SLinus Torvalds .mode = 0644, 43016d9f239aSAlexey Dobriyan .proc_handler = proc_dointvec, 43021da177e4SLinus Torvalds }, 43031da177e4SLinus Torvalds { 43041da177e4SLinus Torvalds .procname = "temp_valid_lft", 43051da177e4SLinus Torvalds .data = &ipv6_devconf.temp_valid_lft, 43061da177e4SLinus Torvalds .maxlen = sizeof(int), 43071da177e4SLinus Torvalds .mode = 0644, 43086d9f239aSAlexey Dobriyan .proc_handler = proc_dointvec, 43091da177e4SLinus Torvalds }, 43101da177e4SLinus Torvalds { 43111da177e4SLinus Torvalds .procname = "temp_prefered_lft", 43121da177e4SLinus Torvalds .data = &ipv6_devconf.temp_prefered_lft, 43131da177e4SLinus Torvalds .maxlen = sizeof(int), 43141da177e4SLinus Torvalds .mode = 0644, 43156d9f239aSAlexey Dobriyan .proc_handler = proc_dointvec, 43161da177e4SLinus Torvalds }, 43171da177e4SLinus Torvalds { 43181da177e4SLinus Torvalds .procname = "regen_max_retry", 43191da177e4SLinus Torvalds .data = &ipv6_devconf.regen_max_retry, 43201da177e4SLinus Torvalds .maxlen = sizeof(int), 43211da177e4SLinus Torvalds .mode = 0644, 43226d9f239aSAlexey Dobriyan .proc_handler = proc_dointvec, 43231da177e4SLinus Torvalds }, 43241da177e4SLinus Torvalds { 43251da177e4SLinus Torvalds .procname = "max_desync_factor", 43261da177e4SLinus Torvalds .data = &ipv6_devconf.max_desync_factor, 43271da177e4SLinus Torvalds .maxlen = sizeof(int), 43281da177e4SLinus Torvalds .mode = 0644, 43296d9f239aSAlexey Dobriyan .proc_handler = proc_dointvec, 43301da177e4SLinus Torvalds }, 43311da177e4SLinus Torvalds #endif 43321da177e4SLinus Torvalds { 43331da177e4SLinus Torvalds .procname = "max_addresses", 43341da177e4SLinus Torvalds .data = &ipv6_devconf.max_addresses, 43351da177e4SLinus Torvalds .maxlen = sizeof(int), 43361da177e4SLinus Torvalds .mode = 0644, 43376d9f239aSAlexey Dobriyan .proc_handler = proc_dointvec, 43381da177e4SLinus Torvalds }, 43391da177e4SLinus Torvalds { 434065f5c7c1SYOSHIFUJI Hideaki .procname = "accept_ra_defrtr", 434165f5c7c1SYOSHIFUJI Hideaki .data = &ipv6_devconf.accept_ra_defrtr, 434265f5c7c1SYOSHIFUJI Hideaki .maxlen = sizeof(int), 434365f5c7c1SYOSHIFUJI Hideaki .mode = 0644, 43446d9f239aSAlexey Dobriyan .proc_handler = proc_dointvec, 434565f5c7c1SYOSHIFUJI Hideaki }, 434665f5c7c1SYOSHIFUJI Hideaki { 4347c4fd30ebSYOSHIFUJI Hideaki .procname = "accept_ra_pinfo", 4348c4fd30ebSYOSHIFUJI Hideaki .data = &ipv6_devconf.accept_ra_pinfo, 4349c4fd30ebSYOSHIFUJI Hideaki .maxlen = sizeof(int), 4350c4fd30ebSYOSHIFUJI Hideaki .mode = 0644, 43516d9f239aSAlexey Dobriyan .proc_handler = proc_dointvec, 4352c4fd30ebSYOSHIFUJI Hideaki }, 4353930d6ff2SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_ROUTER_PREF 4354930d6ff2SYOSHIFUJI Hideaki { 4355930d6ff2SYOSHIFUJI Hideaki .procname = "accept_ra_rtr_pref", 4356930d6ff2SYOSHIFUJI Hideaki .data = &ipv6_devconf.accept_ra_rtr_pref, 4357930d6ff2SYOSHIFUJI Hideaki .maxlen = sizeof(int), 4358930d6ff2SYOSHIFUJI Hideaki .mode = 0644, 43596d9f239aSAlexey Dobriyan .proc_handler = proc_dointvec, 4360930d6ff2SYOSHIFUJI Hideaki }, 436152e16356SYOSHIFUJI Hideaki { 436252e16356SYOSHIFUJI Hideaki .procname = "router_probe_interval", 436352e16356SYOSHIFUJI Hideaki .data = &ipv6_devconf.rtr_probe_interval, 436452e16356SYOSHIFUJI Hideaki .maxlen = sizeof(int), 436552e16356SYOSHIFUJI Hideaki .mode = 0644, 43666d9f239aSAlexey Dobriyan .proc_handler = proc_dointvec_jiffies, 436752e16356SYOSHIFUJI Hideaki }, 4368fa03ef38SNeil Horman #ifdef CONFIG_IPV6_ROUTE_INFO 436909c884d4SYOSHIFUJI Hideaki { 437009c884d4SYOSHIFUJI Hideaki .procname = "accept_ra_rt_info_max_plen", 437109c884d4SYOSHIFUJI Hideaki .data = &ipv6_devconf.accept_ra_rt_info_max_plen, 437209c884d4SYOSHIFUJI Hideaki .maxlen = sizeof(int), 437309c884d4SYOSHIFUJI Hideaki .mode = 0644, 43746d9f239aSAlexey Dobriyan .proc_handler = proc_dointvec, 437509c884d4SYOSHIFUJI Hideaki }, 437609c884d4SYOSHIFUJI Hideaki #endif 4377930d6ff2SYOSHIFUJI Hideaki #endif 4378c4fd30ebSYOSHIFUJI Hideaki { 4379fbea49e1SYOSHIFUJI Hideaki .procname = "proxy_ndp", 4380fbea49e1SYOSHIFUJI Hideaki .data = &ipv6_devconf.proxy_ndp, 4381fbea49e1SYOSHIFUJI Hideaki .maxlen = sizeof(int), 4382fbea49e1SYOSHIFUJI Hideaki .mode = 0644, 43836d9f239aSAlexey Dobriyan .proc_handler = proc_dointvec, 4384fbea49e1SYOSHIFUJI Hideaki }, 4385fbea49e1SYOSHIFUJI Hideaki { 43860bcbc926SYOSHIFUJI Hideaki .procname = "accept_source_route", 43870bcbc926SYOSHIFUJI Hideaki .data = &ipv6_devconf.accept_source_route, 43880bcbc926SYOSHIFUJI Hideaki .maxlen = sizeof(int), 43890bcbc926SYOSHIFUJI Hideaki .mode = 0644, 43906d9f239aSAlexey Dobriyan .proc_handler = proc_dointvec, 43910bcbc926SYOSHIFUJI Hideaki }, 439295c385b4SNeil Horman #ifdef CONFIG_IPV6_OPTIMISTIC_DAD 439395c385b4SNeil Horman { 439495c385b4SNeil Horman .procname = "optimistic_dad", 439595c385b4SNeil Horman .data = &ipv6_devconf.optimistic_dad, 439695c385b4SNeil Horman .maxlen = sizeof(int), 439795c385b4SNeil Horman .mode = 0644, 43986d9f239aSAlexey Dobriyan .proc_handler = proc_dointvec, 439995c385b4SNeil Horman 440095c385b4SNeil Horman }, 440195c385b4SNeil Horman #endif 44027bc570c8SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_MROUTE 44037bc570c8SYOSHIFUJI Hideaki { 44047bc570c8SYOSHIFUJI Hideaki .procname = "mc_forwarding", 44057bc570c8SYOSHIFUJI Hideaki .data = &ipv6_devconf.mc_forwarding, 44067bc570c8SYOSHIFUJI Hideaki .maxlen = sizeof(int), 4407a4e6db07SDavid S. Miller .mode = 0444, 44086d9f239aSAlexey Dobriyan .proc_handler = proc_dointvec, 44097bc570c8SYOSHIFUJI Hideaki }, 44107bc570c8SYOSHIFUJI Hideaki #endif 44110bcbc926SYOSHIFUJI Hideaki { 4412778d80beSYOSHIFUJI Hideaki .procname = "disable_ipv6", 4413778d80beSYOSHIFUJI Hideaki .data = &ipv6_devconf.disable_ipv6, 4414778d80beSYOSHIFUJI Hideaki .maxlen = sizeof(int), 4415778d80beSYOSHIFUJI Hideaki .mode = 0644, 441656d417b1SBrian Haley .proc_handler = addrconf_sysctl_disable, 4417778d80beSYOSHIFUJI Hideaki }, 4418778d80beSYOSHIFUJI Hideaki { 44191b34be74SYOSHIFUJI Hideaki .procname = "accept_dad", 44201b34be74SYOSHIFUJI Hideaki .data = &ipv6_devconf.accept_dad, 44211b34be74SYOSHIFUJI Hideaki .maxlen = sizeof(int), 44221b34be74SYOSHIFUJI Hideaki .mode = 0644, 44236d9f239aSAlexey Dobriyan .proc_handler = proc_dointvec, 44241b34be74SYOSHIFUJI Hideaki }, 44251b34be74SYOSHIFUJI Hideaki { 4426f7734fdfSOctavian Purdila .procname = "force_tllao", 4427f7734fdfSOctavian Purdila .data = &ipv6_devconf.force_tllao, 4428f7734fdfSOctavian Purdila .maxlen = sizeof(int), 4429f7734fdfSOctavian Purdila .mode = 0644, 4430f7734fdfSOctavian Purdila .proc_handler = proc_dointvec 4431f7734fdfSOctavian Purdila }, 4432f7734fdfSOctavian Purdila { 4433f8572d8fSEric W. Biederman /* sentinel */ 44341da177e4SLinus Torvalds } 44351da177e4SLinus Torvalds }, 44361da177e4SLinus Torvalds }; 44371da177e4SLinus Torvalds 4438bff16c2fSPavel Emelyanov static int __addrconf_sysctl_register(struct net *net, char *dev_name, 4439f8572d8fSEric W. Biederman struct inet6_dev *idev, struct ipv6_devconf *p) 44401da177e4SLinus Torvalds { 44411da177e4SLinus Torvalds int i; 44421da177e4SLinus Torvalds struct addrconf_sysctl_table *t; 44431da177e4SLinus Torvalds 44441dab6222SPavel Emelyanov #define ADDRCONF_CTL_PATH_DEV 3 44451dab6222SPavel Emelyanov 44461dab6222SPavel Emelyanov struct ctl_path addrconf_ctl_path[] = { 4447f8572d8fSEric W. Biederman { .procname = "net", }, 4448f8572d8fSEric W. Biederman { .procname = "ipv6", }, 4449f8572d8fSEric W. Biederman { .procname = "conf", }, 44501dab6222SPavel Emelyanov { /* to be set */ }, 44511dab6222SPavel Emelyanov { }, 44521dab6222SPavel Emelyanov }; 44531dab6222SPavel Emelyanov 44541dab6222SPavel Emelyanov 4455af879cc7SArnaldo Carvalho de Melo t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); 44561da177e4SLinus Torvalds if (t == NULL) 4457f68635e6SPavel Emelyanov goto out; 4458f68635e6SPavel Emelyanov 44591da177e4SLinus Torvalds for (i = 0; t->addrconf_vars[i].data; i++) { 44601da177e4SLinus Torvalds t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf; 44611da177e4SLinus Torvalds t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ 4462bff16c2fSPavel Emelyanov t->addrconf_vars[i].extra2 = net; 44631da177e4SLinus Torvalds } 44641da177e4SLinus Torvalds 44651da177e4SLinus Torvalds /* 44661da177e4SLinus Torvalds * Make a copy of dev_name, because '.procname' is regarded as const 44671da177e4SLinus Torvalds * by sysctl and we wouldn't want anyone to change it under our feet 44681da177e4SLinus Torvalds * (see SIOCSIFNAME). 44691da177e4SLinus Torvalds */ 44701dab6222SPavel Emelyanov t->dev_name = kstrdup(dev_name, GFP_KERNEL); 44711dab6222SPavel Emelyanov if (!t->dev_name) 44721da177e4SLinus Torvalds goto free; 44731da177e4SLinus Torvalds 44741dab6222SPavel Emelyanov addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name; 44751da177e4SLinus Torvalds 4476bff16c2fSPavel Emelyanov t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path, 44771dab6222SPavel Emelyanov t->addrconf_vars); 44781da177e4SLinus Torvalds if (t->sysctl_header == NULL) 44791da177e4SLinus Torvalds goto free_procname; 4480f68635e6SPavel Emelyanov 44811da177e4SLinus Torvalds p->sysctl = t; 448295897312SPavel Emelyanov return 0; 44831da177e4SLinus Torvalds 44841da177e4SLinus Torvalds free_procname: 44851dab6222SPavel Emelyanov kfree(t->dev_name); 44861da177e4SLinus Torvalds free: 44871da177e4SLinus Torvalds kfree(t); 4488f68635e6SPavel Emelyanov out: 448995897312SPavel Emelyanov return -ENOBUFS; 44901da177e4SLinus Torvalds } 44911da177e4SLinus Torvalds 4492408c4768SPavel Emelyanov static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) 4493f52295a9SPavel Emelyanov { 4494408c4768SPavel Emelyanov struct addrconf_sysctl_table *t; 4495f52295a9SPavel Emelyanov 4496408c4768SPavel Emelyanov if (p->sysctl == NULL) 4497408c4768SPavel Emelyanov return; 4498408c4768SPavel Emelyanov 4499408c4768SPavel Emelyanov t = p->sysctl; 45001da177e4SLinus Torvalds p->sysctl = NULL; 45011da177e4SLinus Torvalds unregister_sysctl_table(t->sysctl_header); 45021dab6222SPavel Emelyanov kfree(t->dev_name); 45031da177e4SLinus Torvalds kfree(t); 45041da177e4SLinus Torvalds } 4505408c4768SPavel Emelyanov 4506408c4768SPavel Emelyanov static void addrconf_sysctl_register(struct inet6_dev *idev) 4507408c4768SPavel Emelyanov { 450854716e3bSEric W. Biederman neigh_sysctl_register(idev->dev, idev->nd_parms, "ipv6", 4509f8572d8fSEric W. Biederman &ndisc_ifinfo_sysctl_change); 4510c346dca1SYOSHIFUJI Hideaki __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, 4511f8572d8fSEric W. Biederman idev, &idev->cnf); 4512408c4768SPavel Emelyanov } 4513408c4768SPavel Emelyanov 4514408c4768SPavel Emelyanov static void addrconf_sysctl_unregister(struct inet6_dev *idev) 4515408c4768SPavel Emelyanov { 4516408c4768SPavel Emelyanov __addrconf_sysctl_unregister(&idev->cnf); 4517408c4768SPavel Emelyanov neigh_sysctl_unregister(idev->nd_parms); 45181da177e4SLinus Torvalds } 45191da177e4SLinus Torvalds 45201da177e4SLinus Torvalds 45211da177e4SLinus Torvalds #endif 45221da177e4SLinus Torvalds 45232c8c1e72SAlexey Dobriyan static int __net_init addrconf_init_net(struct net *net) 4524e0da5a48SPavel Emelyanov { 4525e0da5a48SPavel Emelyanov int err; 4526e0da5a48SPavel Emelyanov struct ipv6_devconf *all, *dflt; 4527e0da5a48SPavel Emelyanov 4528e0da5a48SPavel Emelyanov err = -ENOMEM; 4529e0da5a48SPavel Emelyanov all = &ipv6_devconf; 4530e0da5a48SPavel Emelyanov dflt = &ipv6_devconf_dflt; 4531e0da5a48SPavel Emelyanov 453209ad9bc7SOctavian Purdila if (!net_eq(net, &init_net)) { 4533e0da5a48SPavel Emelyanov all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL); 4534e0da5a48SPavel Emelyanov if (all == NULL) 4535e0da5a48SPavel Emelyanov goto err_alloc_all; 4536e0da5a48SPavel Emelyanov 4537e0da5a48SPavel Emelyanov dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); 4538e0da5a48SPavel Emelyanov if (dflt == NULL) 4539e0da5a48SPavel Emelyanov goto err_alloc_dflt; 454056d417b1SBrian Haley } else { 454156d417b1SBrian Haley /* these will be inherited by all namespaces */ 454256d417b1SBrian Haley dflt->autoconf = ipv6_defaults.autoconf; 454356d417b1SBrian Haley dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; 4544e0da5a48SPavel Emelyanov } 4545e0da5a48SPavel Emelyanov 4546e0da5a48SPavel Emelyanov net->ipv6.devconf_all = all; 4547e0da5a48SPavel Emelyanov net->ipv6.devconf_dflt = dflt; 4548e0da5a48SPavel Emelyanov 4549e0da5a48SPavel Emelyanov #ifdef CONFIG_SYSCTL 4550f8572d8fSEric W. Biederman err = __addrconf_sysctl_register(net, "all", NULL, all); 4551e0da5a48SPavel Emelyanov if (err < 0) 4552e0da5a48SPavel Emelyanov goto err_reg_all; 4553e0da5a48SPavel Emelyanov 4554f8572d8fSEric W. Biederman err = __addrconf_sysctl_register(net, "default", NULL, dflt); 4555e0da5a48SPavel Emelyanov if (err < 0) 4556e0da5a48SPavel Emelyanov goto err_reg_dflt; 4557e0da5a48SPavel Emelyanov #endif 4558e0da5a48SPavel Emelyanov return 0; 4559e0da5a48SPavel Emelyanov 4560e0da5a48SPavel Emelyanov #ifdef CONFIG_SYSCTL 4561e0da5a48SPavel Emelyanov err_reg_dflt: 4562e0da5a48SPavel Emelyanov __addrconf_sysctl_unregister(all); 4563e0da5a48SPavel Emelyanov err_reg_all: 4564e0da5a48SPavel Emelyanov kfree(dflt); 4565e0da5a48SPavel Emelyanov #endif 4566e0da5a48SPavel Emelyanov err_alloc_dflt: 4567e0da5a48SPavel Emelyanov kfree(all); 4568e0da5a48SPavel Emelyanov err_alloc_all: 4569e0da5a48SPavel Emelyanov return err; 4570e0da5a48SPavel Emelyanov } 4571e0da5a48SPavel Emelyanov 45722c8c1e72SAlexey Dobriyan static void __net_exit addrconf_exit_net(struct net *net) 4573e0da5a48SPavel Emelyanov { 4574e0da5a48SPavel Emelyanov #ifdef CONFIG_SYSCTL 4575e0da5a48SPavel Emelyanov __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); 4576e0da5a48SPavel Emelyanov __addrconf_sysctl_unregister(net->ipv6.devconf_all); 4577e0da5a48SPavel Emelyanov #endif 457809ad9bc7SOctavian Purdila if (!net_eq(net, &init_net)) { 4579e0da5a48SPavel Emelyanov kfree(net->ipv6.devconf_dflt); 4580e0da5a48SPavel Emelyanov kfree(net->ipv6.devconf_all); 4581e0da5a48SPavel Emelyanov } 4582e0da5a48SPavel Emelyanov } 4583e0da5a48SPavel Emelyanov 4584e0da5a48SPavel Emelyanov static struct pernet_operations addrconf_ops = { 4585e0da5a48SPavel Emelyanov .init = addrconf_init_net, 4586e0da5a48SPavel Emelyanov .exit = addrconf_exit_net, 4587e0da5a48SPavel Emelyanov }; 4588e0da5a48SPavel Emelyanov 45891da177e4SLinus Torvalds /* 45901da177e4SLinus Torvalds * Device notifier 45911da177e4SLinus Torvalds */ 45921da177e4SLinus Torvalds 45931da177e4SLinus Torvalds int register_inet6addr_notifier(struct notifier_block *nb) 45941da177e4SLinus Torvalds { 4595e041c683SAlan Stern return atomic_notifier_chain_register(&inet6addr_chain, nb); 45961da177e4SLinus Torvalds } 45977159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(register_inet6addr_notifier); 45987159039aSYOSHIFUJI Hideaki 45991da177e4SLinus Torvalds int unregister_inet6addr_notifier(struct notifier_block *nb) 46001da177e4SLinus Torvalds { 4601e041c683SAlan Stern return atomic_notifier_chain_unregister(&inet6addr_chain, nb); 46021da177e4SLinus Torvalds } 46037159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(unregister_inet6addr_notifier); 46047159039aSYOSHIFUJI Hideaki 46051da177e4SLinus Torvalds /* 46061da177e4SLinus Torvalds * Init / cleanup code 46071da177e4SLinus Torvalds */ 46081da177e4SLinus Torvalds 46091da177e4SLinus Torvalds int __init addrconf_init(void) 46101da177e4SLinus Torvalds { 4611c2e21293Sstephen hemminger int i, err; 46122a8cc6c8SYOSHIFUJI Hideaki 4613e21e8467SStephen Hemminger err = ipv6_addr_label_init(); 4614e21e8467SStephen Hemminger if (err < 0) { 4615e21e8467SStephen Hemminger printk(KERN_CRIT "IPv6 Addrconf:" 4616e21e8467SStephen Hemminger " cannot initialize default policy table: %d.\n", err); 46172a8cc6c8SYOSHIFUJI Hideaki return err; 46182a8cc6c8SYOSHIFUJI Hideaki } 46191da177e4SLinus Torvalds 4620e0da5a48SPavel Emelyanov register_pernet_subsys(&addrconf_ops); 4621e0da5a48SPavel Emelyanov 46221da177e4SLinus Torvalds /* The addrconf netdev notifier requires that loopback_dev 46231da177e4SLinus Torvalds * has it's ipv6 private information allocated and setup 46241da177e4SLinus Torvalds * before it can bring up and give link-local addresses 46251da177e4SLinus Torvalds * to other devices which are up. 46261da177e4SLinus Torvalds * 46271da177e4SLinus Torvalds * Unfortunately, loopback_dev is not necessarily the first 46281da177e4SLinus Torvalds * entry in the global dev_base list of net devices. In fact, 46291da177e4SLinus Torvalds * it is likely to be the very last entry on that list. 46301da177e4SLinus Torvalds * So this causes the notifier registry below to try and 46311da177e4SLinus Torvalds * give link-local addresses to all devices besides loopback_dev 46321da177e4SLinus Torvalds * first, then loopback_dev, which cases all the non-loopback_dev 46331da177e4SLinus Torvalds * devices to fail to get a link-local address. 46341da177e4SLinus Torvalds * 46351da177e4SLinus Torvalds * So, as a temporary fix, allocate the ipv6 structure for 46361da177e4SLinus Torvalds * loopback_dev first by hand. 46371da177e4SLinus Torvalds * Longer term, all of the dependencies ipv6 has upon the loopback 46381da177e4SLinus Torvalds * device and it being up should be removed. 46391da177e4SLinus Torvalds */ 46401da177e4SLinus Torvalds rtnl_lock(); 46412774c7abSEric W. Biederman if (!ipv6_add_dev(init_net.loopback_dev)) 46421da177e4SLinus Torvalds err = -ENOMEM; 46431da177e4SLinus Torvalds rtnl_unlock(); 46441da177e4SLinus Torvalds if (err) 4645e0da5a48SPavel Emelyanov goto errlo; 46461da177e4SLinus Torvalds 4647c2e21293Sstephen hemminger for (i = 0; i < IN6_ADDR_HSIZE; i++) 4648c2e21293Sstephen hemminger INIT_HLIST_HEAD(&inet6_addr_lst[i]); 4649c2e21293Sstephen hemminger 46501da177e4SLinus Torvalds register_netdevice_notifier(&ipv6_dev_notf); 46511da177e4SLinus Torvalds 46521da177e4SLinus Torvalds addrconf_verify(0); 4653c127ea2cSThomas Graf 4654c127ea2cSThomas Graf err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo); 4655c127ea2cSThomas Graf if (err < 0) 4656c127ea2cSThomas Graf goto errout; 4657c127ea2cSThomas Graf 4658c127ea2cSThomas Graf /* Only the first call to __rtnl_register can fail */ 4659c127ea2cSThomas Graf __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL); 4660c127ea2cSThomas Graf __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL); 4661c127ea2cSThomas Graf __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr); 4662c127ea2cSThomas Graf __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr); 4663c127ea2cSThomas Graf __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr); 4664c127ea2cSThomas Graf 46652a8cc6c8SYOSHIFUJI Hideaki ipv6_addr_label_rtnl_register(); 46662a8cc6c8SYOSHIFUJI Hideaki 46671da177e4SLinus Torvalds return 0; 4668c127ea2cSThomas Graf errout: 4669c127ea2cSThomas Graf unregister_netdevice_notifier(&ipv6_dev_notf); 4670e0da5a48SPavel Emelyanov errlo: 4671e0da5a48SPavel Emelyanov unregister_pernet_subsys(&addrconf_ops); 4672c127ea2cSThomas Graf 4673c127ea2cSThomas Graf return err; 46741da177e4SLinus Torvalds } 46751da177e4SLinus Torvalds 467609f7709fSDaniel Lezcano void addrconf_cleanup(void) 46771da177e4SLinus Torvalds { 4678176c39afSDaniel Lezcano struct net_device *dev; 46791da177e4SLinus Torvalds int i; 46801da177e4SLinus Torvalds 46811da177e4SLinus Torvalds unregister_netdevice_notifier(&ipv6_dev_notf); 4682e0da5a48SPavel Emelyanov unregister_pernet_subsys(&addrconf_ops); 46831da177e4SLinus Torvalds 46841da177e4SLinus Torvalds rtnl_lock(); 46851da177e4SLinus Torvalds 4686176c39afSDaniel Lezcano /* clean dev list */ 4687176c39afSDaniel Lezcano for_each_netdev(&init_net, dev) { 4688176c39afSDaniel Lezcano if (__in6_dev_get(dev) == NULL) 4689176c39afSDaniel Lezcano continue; 4690176c39afSDaniel Lezcano addrconf_ifdown(dev, 1); 4691176c39afSDaniel Lezcano } 4692176c39afSDaniel Lezcano addrconf_ifdown(init_net.loopback_dev, 2); 4693176c39afSDaniel Lezcano 46941da177e4SLinus Torvalds /* 46951da177e4SLinus Torvalds * Check hash table. 46961da177e4SLinus Torvalds */ 46975c578aedSstephen hemminger spin_lock_bh(&addrconf_hash_lock); 4698c2e21293Sstephen hemminger for (i = 0; i < IN6_ADDR_HSIZE; i++) 4699c2e21293Sstephen hemminger WARN_ON(!hlist_empty(&inet6_addr_lst[i])); 47005c578aedSstephen hemminger spin_unlock_bh(&addrconf_hash_lock); 47011da177e4SLinus Torvalds 47021da177e4SLinus Torvalds del_timer(&addr_chk_timer); 47031da177e4SLinus Torvalds rtnl_unlock(); 47041da177e4SLinus Torvalds } 4705