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 * $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $ 101da177e4SLinus Torvalds * 111da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or 121da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License 131da177e4SLinus Torvalds * as published by the Free Software Foundation; either version 141da177e4SLinus Torvalds * 2 of the License, or (at your option) any later version. 151da177e4SLinus Torvalds */ 161da177e4SLinus Torvalds 171da177e4SLinus Torvalds /* 181da177e4SLinus Torvalds * Changes: 191da177e4SLinus Torvalds * 201da177e4SLinus Torvalds * Janos Farkas : delete timer on ifdown 211da177e4SLinus Torvalds * <chexum@bankinf.banki.hu> 221da177e4SLinus Torvalds * Andi Kleen : kill double kfree on module 231da177e4SLinus Torvalds * unload. 241da177e4SLinus Torvalds * Maciej W. Rozycki : FDDI support 251da177e4SLinus Torvalds * sekiya@USAGI : Don't send too many RS 261da177e4SLinus Torvalds * packets. 271da177e4SLinus Torvalds * yoshfuji@USAGI : Fixed interval between DAD 281da177e4SLinus Torvalds * packets. 291da177e4SLinus Torvalds * YOSHIFUJI Hideaki @USAGI : improved accuracy of 301da177e4SLinus Torvalds * address validation timer. 311da177e4SLinus Torvalds * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041) 321da177e4SLinus Torvalds * support. 331da177e4SLinus Torvalds * Yuji SEKIYA @USAGI : Don't assign a same IPv6 341da177e4SLinus Torvalds * address on a same interface. 351da177e4SLinus Torvalds * YOSHIFUJI Hideaki @USAGI : ARCnet support 361da177e4SLinus Torvalds * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to 371da177e4SLinus Torvalds * seq_file. 38b1cacb68SYOSHIFUJI Hideaki * YOSHIFUJI Hideaki @USAGI : improved source address 39b1cacb68SYOSHIFUJI Hideaki * selection; consider scope, 40b1cacb68SYOSHIFUJI Hideaki * status etc. 411da177e4SLinus Torvalds */ 421da177e4SLinus Torvalds 431da177e4SLinus Torvalds #include <linux/errno.h> 441da177e4SLinus Torvalds #include <linux/types.h> 451da177e4SLinus Torvalds #include <linux/socket.h> 461da177e4SLinus Torvalds #include <linux/sockios.h> 471da177e4SLinus Torvalds #include <linux/net.h> 481da177e4SLinus Torvalds #include <linux/in6.h> 491da177e4SLinus Torvalds #include <linux/netdevice.h> 501823730fSThomas Graf #include <linux/if_addr.h> 511da177e4SLinus Torvalds #include <linux/if_arp.h> 521da177e4SLinus Torvalds #include <linux/if_arcnet.h> 531da177e4SLinus Torvalds #include <linux/if_infiniband.h> 541da177e4SLinus Torvalds #include <linux/route.h> 551da177e4SLinus Torvalds #include <linux/inetdevice.h> 561da177e4SLinus Torvalds #include <linux/init.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 851da177e4SLinus Torvalds #include <asm/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 1031da177e4SLinus Torvalds #ifdef CONFIG_SYSCTL 1041da177e4SLinus Torvalds static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p); 1051da177e4SLinus Torvalds static void addrconf_sysctl_unregister(struct ipv6_devconf *p); 1061da177e4SLinus Torvalds #endif 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 1091da177e4SLinus Torvalds static int __ipv6_regen_rndid(struct inet6_dev *idev); 1101da177e4SLinus Torvalds static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); 1111da177e4SLinus Torvalds static void ipv6_regen_rndid(unsigned long data); 1121da177e4SLinus Torvalds 1131da177e4SLinus Torvalds static int desync_factor = MAX_DESYNC_FACTOR * HZ; 1141da177e4SLinus Torvalds #endif 1151da177e4SLinus Torvalds 1161da177e4SLinus Torvalds static int ipv6_count_addresses(struct inet6_dev *idev); 1171da177e4SLinus Torvalds 1181da177e4SLinus Torvalds /* 1191da177e4SLinus Torvalds * Configured unicast address hash table 1201da177e4SLinus Torvalds */ 1211da177e4SLinus Torvalds static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE]; 1221da177e4SLinus Torvalds static DEFINE_RWLOCK(addrconf_hash_lock); 1231da177e4SLinus Torvalds 1241da177e4SLinus Torvalds static void addrconf_verify(unsigned long); 1251da177e4SLinus Torvalds 1268d06afabSIngo Molnar static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0); 1271da177e4SLinus Torvalds static DEFINE_SPINLOCK(addrconf_verify_lock); 1281da177e4SLinus Torvalds 1291da177e4SLinus Torvalds static void addrconf_join_anycast(struct inet6_ifaddr *ifp); 1301da177e4SLinus Torvalds static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); 1311da177e4SLinus Torvalds 1321da177e4SLinus Torvalds static int addrconf_ifdown(struct net_device *dev, int how); 1331da177e4SLinus Torvalds 134e431b8c0SJamal Hadi Salim static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags); 1351da177e4SLinus Torvalds static void addrconf_dad_timer(unsigned long data); 1361da177e4SLinus Torvalds static void addrconf_dad_completed(struct inet6_ifaddr *ifp); 137c5e33bddSYOSHIFUJI Hideaki static void addrconf_dad_run(struct inet6_dev *idev); 1381da177e4SLinus Torvalds static void addrconf_rs_timer(unsigned long data); 1391da177e4SLinus Torvalds static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); 1401da177e4SLinus Torvalds static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds static void inet6_prefix_notify(int event, struct inet6_dev *idev, 1431da177e4SLinus Torvalds struct prefix_info *pinfo); 1441da177e4SLinus Torvalds static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev); 1451da177e4SLinus Torvalds 146e041c683SAlan Stern static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); 1471da177e4SLinus Torvalds 148ab32ea5dSBrian Haley struct ipv6_devconf ipv6_devconf __read_mostly = { 1491da177e4SLinus Torvalds .forwarding = 0, 1501da177e4SLinus Torvalds .hop_limit = IPV6_DEFAULT_HOPLIMIT, 1511da177e4SLinus Torvalds .mtu6 = IPV6_MIN_MTU, 1521da177e4SLinus Torvalds .accept_ra = 1, 1531da177e4SLinus Torvalds .accept_redirects = 1, 1541da177e4SLinus Torvalds .autoconf = 1, 1551da177e4SLinus Torvalds .force_mld_version = 0, 1561da177e4SLinus Torvalds .dad_transmits = 1, 1571da177e4SLinus Torvalds .rtr_solicits = MAX_RTR_SOLICITATIONS, 1581da177e4SLinus Torvalds .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, 1591da177e4SLinus Torvalds .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, 1601da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 1611da177e4SLinus Torvalds .use_tempaddr = 0, 1621da177e4SLinus Torvalds .temp_valid_lft = TEMP_VALID_LIFETIME, 1631da177e4SLinus Torvalds .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, 1641da177e4SLinus Torvalds .regen_max_retry = REGEN_MAX_RETRY, 1651da177e4SLinus Torvalds .max_desync_factor = MAX_DESYNC_FACTOR, 1661da177e4SLinus Torvalds #endif 1671da177e4SLinus Torvalds .max_addresses = IPV6_MAX_ADDRESSES, 16865f5c7c1SYOSHIFUJI Hideaki .accept_ra_defrtr = 1, 169c4fd30ebSYOSHIFUJI Hideaki .accept_ra_pinfo = 1, 170930d6ff2SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_ROUTER_PREF 171930d6ff2SYOSHIFUJI Hideaki .accept_ra_rtr_pref = 1, 17252e16356SYOSHIFUJI Hideaki .rtr_probe_interval = 60 * HZ, 17309c884d4SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_ROUTE_INFO 17409c884d4SYOSHIFUJI Hideaki .accept_ra_rt_info_max_plen = 0, 17509c884d4SYOSHIFUJI Hideaki #endif 176930d6ff2SYOSHIFUJI Hideaki #endif 177fbea49e1SYOSHIFUJI Hideaki .proxy_ndp = 0, 1780bcbc926SYOSHIFUJI Hideaki .accept_source_route = 0, /* we do not accept RH0 by default. */ 1791da177e4SLinus Torvalds }; 1801da177e4SLinus Torvalds 181ab32ea5dSBrian Haley static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { 1821da177e4SLinus Torvalds .forwarding = 0, 1831da177e4SLinus Torvalds .hop_limit = IPV6_DEFAULT_HOPLIMIT, 1841da177e4SLinus Torvalds .mtu6 = IPV6_MIN_MTU, 1851da177e4SLinus Torvalds .accept_ra = 1, 1861da177e4SLinus Torvalds .accept_redirects = 1, 1871da177e4SLinus Torvalds .autoconf = 1, 1881da177e4SLinus Torvalds .dad_transmits = 1, 1891da177e4SLinus Torvalds .rtr_solicits = MAX_RTR_SOLICITATIONS, 1901da177e4SLinus Torvalds .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, 1911da177e4SLinus Torvalds .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, 1921da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 1931da177e4SLinus Torvalds .use_tempaddr = 0, 1941da177e4SLinus Torvalds .temp_valid_lft = TEMP_VALID_LIFETIME, 1951da177e4SLinus Torvalds .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, 1961da177e4SLinus Torvalds .regen_max_retry = REGEN_MAX_RETRY, 1971da177e4SLinus Torvalds .max_desync_factor = MAX_DESYNC_FACTOR, 1981da177e4SLinus Torvalds #endif 1991da177e4SLinus Torvalds .max_addresses = IPV6_MAX_ADDRESSES, 20065f5c7c1SYOSHIFUJI Hideaki .accept_ra_defrtr = 1, 201c4fd30ebSYOSHIFUJI Hideaki .accept_ra_pinfo = 1, 202930d6ff2SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_ROUTER_PREF 203930d6ff2SYOSHIFUJI Hideaki .accept_ra_rtr_pref = 1, 20452e16356SYOSHIFUJI Hideaki .rtr_probe_interval = 60 * HZ, 20509c884d4SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_ROUTE_INFO 20609c884d4SYOSHIFUJI Hideaki .accept_ra_rt_info_max_plen = 0, 20709c884d4SYOSHIFUJI Hideaki #endif 208930d6ff2SYOSHIFUJI Hideaki #endif 209fbea49e1SYOSHIFUJI Hideaki .proxy_ndp = 0, 2100bcbc926SYOSHIFUJI Hideaki .accept_source_route = 0, /* we do not accept RH0 by default. */ 2111da177e4SLinus Torvalds }; 2121da177e4SLinus Torvalds 2131da177e4SLinus Torvalds /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ 2141da177e4SLinus Torvalds const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; 2151da177e4SLinus Torvalds const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; 2161da177e4SLinus Torvalds 217f24e3d65SMitsuru Chinen /* Check if a valid qdisc is available */ 218f24e3d65SMitsuru Chinen static inline int addrconf_qdisc_ok(struct net_device *dev) 219f24e3d65SMitsuru Chinen { 220f24e3d65SMitsuru Chinen return (dev->qdisc != &noop_qdisc); 221f24e3d65SMitsuru Chinen } 222f24e3d65SMitsuru Chinen 2231da177e4SLinus Torvalds static void addrconf_del_timer(struct inet6_ifaddr *ifp) 2241da177e4SLinus Torvalds { 2251da177e4SLinus Torvalds if (del_timer(&ifp->timer)) 2261da177e4SLinus Torvalds __in6_ifa_put(ifp); 2271da177e4SLinus Torvalds } 2281da177e4SLinus Torvalds 2291da177e4SLinus Torvalds enum addrconf_timer_t 2301da177e4SLinus Torvalds { 2311da177e4SLinus Torvalds AC_NONE, 2321da177e4SLinus Torvalds AC_DAD, 2331da177e4SLinus Torvalds AC_RS, 2341da177e4SLinus Torvalds }; 2351da177e4SLinus Torvalds 2361da177e4SLinus Torvalds static void addrconf_mod_timer(struct inet6_ifaddr *ifp, 2371da177e4SLinus Torvalds enum addrconf_timer_t what, 2381da177e4SLinus Torvalds unsigned long when) 2391da177e4SLinus Torvalds { 2401da177e4SLinus Torvalds if (!del_timer(&ifp->timer)) 2411da177e4SLinus Torvalds in6_ifa_hold(ifp); 2421da177e4SLinus Torvalds 2431da177e4SLinus Torvalds switch (what) { 2441da177e4SLinus Torvalds case AC_DAD: 2451da177e4SLinus Torvalds ifp->timer.function = addrconf_dad_timer; 2461da177e4SLinus Torvalds break; 2471da177e4SLinus Torvalds case AC_RS: 2481da177e4SLinus Torvalds ifp->timer.function = addrconf_rs_timer; 2491da177e4SLinus Torvalds break; 2501da177e4SLinus Torvalds default:; 2511da177e4SLinus Torvalds } 2521da177e4SLinus Torvalds ifp->timer.expires = jiffies + when; 2531da177e4SLinus Torvalds add_timer(&ifp->timer); 2541da177e4SLinus Torvalds } 2551da177e4SLinus Torvalds 2567f7d9a6bSHerbert Xu static int snmp6_alloc_dev(struct inet6_dev *idev) 2577f7d9a6bSHerbert Xu { 2587f7d9a6bSHerbert Xu int err = -ENOMEM; 2597f7d9a6bSHerbert Xu 2607f7d9a6bSHerbert Xu if (!idev || !idev->dev) 2617f7d9a6bSHerbert Xu return -EINVAL; 2627f7d9a6bSHerbert Xu 2637f7d9a6bSHerbert Xu if (snmp_mib_init((void **)idev->stats.ipv6, 2647f7d9a6bSHerbert Xu sizeof(struct ipstats_mib), 2657f7d9a6bSHerbert Xu __alignof__(struct ipstats_mib)) < 0) 2667f7d9a6bSHerbert Xu goto err_ip; 2677f7d9a6bSHerbert Xu if (snmp_mib_init((void **)idev->stats.icmpv6, 2687f7d9a6bSHerbert Xu sizeof(struct icmpv6_mib), 2697f7d9a6bSHerbert Xu __alignof__(struct icmpv6_mib)) < 0) 2707f7d9a6bSHerbert Xu goto err_icmp; 27114878f75SDavid L Stevens if (snmp_mib_init((void **)idev->stats.icmpv6msg, 27214878f75SDavid L Stevens sizeof(struct icmpv6msg_mib), 27314878f75SDavid L Stevens __alignof__(struct icmpv6msg_mib)) < 0) 27414878f75SDavid L Stevens goto err_icmpmsg; 2757f7d9a6bSHerbert Xu 2767f7d9a6bSHerbert Xu return 0; 2777f7d9a6bSHerbert Xu 27814878f75SDavid L Stevens err_icmpmsg: 27914878f75SDavid L Stevens snmp_mib_free((void **)idev->stats.icmpv6); 2807f7d9a6bSHerbert Xu err_icmp: 2817f7d9a6bSHerbert Xu snmp_mib_free((void **)idev->stats.ipv6); 2827f7d9a6bSHerbert Xu err_ip: 2837f7d9a6bSHerbert Xu return err; 2847f7d9a6bSHerbert Xu } 2857f7d9a6bSHerbert Xu 28616910b98SPavel Emelyanov static void snmp6_free_dev(struct inet6_dev *idev) 2877f7d9a6bSHerbert Xu { 28814878f75SDavid L Stevens snmp_mib_free((void **)idev->stats.icmpv6msg); 2897f7d9a6bSHerbert Xu snmp_mib_free((void **)idev->stats.icmpv6); 2907f7d9a6bSHerbert Xu snmp_mib_free((void **)idev->stats.ipv6); 2917f7d9a6bSHerbert Xu } 2927f7d9a6bSHerbert Xu 2931da177e4SLinus Torvalds /* Nobody refers to this device, we may destroy it. */ 2941da177e4SLinus Torvalds 2958814c4b5SYOSHIFUJI Hideaki static void in6_dev_finish_destroy_rcu(struct rcu_head *head) 2968814c4b5SYOSHIFUJI Hideaki { 2978814c4b5SYOSHIFUJI Hideaki struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu); 2988814c4b5SYOSHIFUJI Hideaki kfree(idev); 2998814c4b5SYOSHIFUJI Hideaki } 3008814c4b5SYOSHIFUJI Hideaki 3011da177e4SLinus Torvalds void in6_dev_finish_destroy(struct inet6_dev *idev) 3021da177e4SLinus Torvalds { 3031da177e4SLinus Torvalds struct net_device *dev = idev->dev; 3041da177e4SLinus Torvalds BUG_TRAP(idev->addr_list==NULL); 3051da177e4SLinus Torvalds BUG_TRAP(idev->mc_list==NULL); 3061da177e4SLinus Torvalds #ifdef NET_REFCNT_DEBUG 3071da177e4SLinus Torvalds printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL"); 3081da177e4SLinus Torvalds #endif 3091da177e4SLinus Torvalds dev_put(dev); 3101da177e4SLinus Torvalds if (!idev->dead) { 3111da177e4SLinus Torvalds printk("Freeing alive inet6 device %p\n", idev); 3121da177e4SLinus Torvalds return; 3131da177e4SLinus Torvalds } 3141da177e4SLinus Torvalds snmp6_free_dev(idev); 3158814c4b5SYOSHIFUJI Hideaki call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu); 3161da177e4SLinus Torvalds } 3171da177e4SLinus Torvalds 3187159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(in6_dev_finish_destroy); 3197159039aSYOSHIFUJI Hideaki 3201da177e4SLinus Torvalds static struct inet6_dev * ipv6_add_dev(struct net_device *dev) 3211da177e4SLinus Torvalds { 3221da177e4SLinus Torvalds struct inet6_dev *ndev; 323d88ae4ccSYOSHIFUJI Hideaki struct in6_addr maddr; 3241da177e4SLinus Torvalds 3251da177e4SLinus Torvalds ASSERT_RTNL(); 3261da177e4SLinus Torvalds 3271da177e4SLinus Torvalds if (dev->mtu < IPV6_MIN_MTU) 3281da177e4SLinus Torvalds return NULL; 3291da177e4SLinus Torvalds 330322f74a4SIngo Oeser ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); 3311da177e4SLinus Torvalds 332322f74a4SIngo Oeser if (ndev == NULL) 333322f74a4SIngo Oeser return NULL; 3341da177e4SLinus Torvalds 3351da177e4SLinus Torvalds rwlock_init(&ndev->lock); 3361da177e4SLinus Torvalds ndev->dev = dev; 3371da177e4SLinus Torvalds memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf)); 3381da177e4SLinus Torvalds ndev->cnf.mtu6 = dev->mtu; 3391da177e4SLinus Torvalds ndev->cnf.sysctl = NULL; 3401da177e4SLinus Torvalds ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); 3411da177e4SLinus Torvalds if (ndev->nd_parms == NULL) { 3421da177e4SLinus Torvalds kfree(ndev); 3431da177e4SLinus Torvalds return NULL; 3441da177e4SLinus Torvalds } 3451da177e4SLinus Torvalds /* We refer to the device */ 3461da177e4SLinus Torvalds dev_hold(dev); 3471da177e4SLinus Torvalds 3481da177e4SLinus Torvalds if (snmp6_alloc_dev(ndev) < 0) { 3491da177e4SLinus Torvalds ADBG((KERN_WARNING 3501da177e4SLinus Torvalds "%s(): cannot allocate memory for statistics; dev=%s.\n", 3511da177e4SLinus Torvalds __FUNCTION__, dev->name)); 3521da177e4SLinus Torvalds neigh_parms_release(&nd_tbl, ndev->nd_parms); 3531da177e4SLinus Torvalds ndev->dead = 1; 3541da177e4SLinus Torvalds in6_dev_finish_destroy(ndev); 3551da177e4SLinus Torvalds return NULL; 3561da177e4SLinus Torvalds } 3571da177e4SLinus Torvalds 3581da177e4SLinus Torvalds if (snmp6_register_dev(ndev) < 0) { 3591da177e4SLinus Torvalds ADBG((KERN_WARNING 3601da177e4SLinus Torvalds "%s(): cannot create /proc/net/dev_snmp6/%s\n", 3611da177e4SLinus Torvalds __FUNCTION__, dev->name)); 3621da177e4SLinus Torvalds neigh_parms_release(&nd_tbl, ndev->nd_parms); 3631da177e4SLinus Torvalds ndev->dead = 1; 3641da177e4SLinus Torvalds in6_dev_finish_destroy(ndev); 3651da177e4SLinus Torvalds return NULL; 3661da177e4SLinus Torvalds } 3671da177e4SLinus Torvalds 3681da177e4SLinus Torvalds /* One reference from device. We must do this before 3691da177e4SLinus Torvalds * we invoke __ipv6_regen_rndid(). 3701da177e4SLinus Torvalds */ 3711da177e4SLinus Torvalds in6_dev_hold(ndev); 3721da177e4SLinus Torvalds 3731da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 3741da177e4SLinus Torvalds init_timer(&ndev->regen_timer); 3751da177e4SLinus Torvalds ndev->regen_timer.function = ipv6_regen_rndid; 3761da177e4SLinus Torvalds ndev->regen_timer.data = (unsigned long) ndev; 3771da177e4SLinus Torvalds if ((dev->flags&IFF_LOOPBACK) || 3781da177e4SLinus Torvalds dev->type == ARPHRD_TUNNEL || 3790be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) 3800be669bbSJoerg Roedel dev->type == ARPHRD_SIT || 3810be669bbSJoerg Roedel #endif 3820be669bbSJoerg Roedel dev->type == ARPHRD_NONE) { 3831da177e4SLinus Torvalds printk(KERN_INFO 384a1493d9cSDavid S. Miller "%s: Disabled Privacy Extensions\n", 385a1493d9cSDavid S. Miller dev->name); 3861da177e4SLinus Torvalds ndev->cnf.use_tempaddr = -1; 3871da177e4SLinus Torvalds } else { 3881da177e4SLinus Torvalds in6_dev_hold(ndev); 3891da177e4SLinus Torvalds ipv6_regen_rndid((unsigned long) ndev); 3901da177e4SLinus Torvalds } 3911da177e4SLinus Torvalds #endif 3921da177e4SLinus Torvalds 393f24e3d65SMitsuru Chinen if (netif_running(dev) && addrconf_qdisc_ok(dev)) 39453aadcc9SHerbert Xu ndev->if_flags |= IF_READY; 39553aadcc9SHerbert Xu 3961da177e4SLinus Torvalds ipv6_mc_init_dev(ndev); 3971da177e4SLinus Torvalds ndev->tstamp = jiffies; 3981da177e4SLinus Torvalds #ifdef CONFIG_SYSCTL 3991da177e4SLinus Torvalds neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6, 4001da177e4SLinus Torvalds NET_IPV6_NEIGH, "ipv6", 4011da177e4SLinus Torvalds &ndisc_ifinfo_sysctl_change, 4021da177e4SLinus Torvalds NULL); 4031da177e4SLinus Torvalds addrconf_sysctl_register(ndev, &ndev->cnf); 4041da177e4SLinus Torvalds #endif 40530c4cf57SDavid L Stevens /* protected by rtnl_lock */ 40630c4cf57SDavid L Stevens rcu_assign_pointer(dev->ip6_ptr, ndev); 407d88ae4ccSYOSHIFUJI Hideaki 408d88ae4ccSYOSHIFUJI Hideaki /* Join all-node multicast group */ 409d88ae4ccSYOSHIFUJI Hideaki ipv6_addr_all_nodes(&maddr); 410d88ae4ccSYOSHIFUJI Hideaki ipv6_dev_mc_inc(dev, &maddr); 411d88ae4ccSYOSHIFUJI Hideaki 4121da177e4SLinus Torvalds return ndev; 4131da177e4SLinus Torvalds } 4141da177e4SLinus Torvalds 4151da177e4SLinus Torvalds static struct inet6_dev * ipv6_find_idev(struct net_device *dev) 4161da177e4SLinus Torvalds { 4171da177e4SLinus Torvalds struct inet6_dev *idev; 4181da177e4SLinus Torvalds 4191da177e4SLinus Torvalds ASSERT_RTNL(); 4201da177e4SLinus Torvalds 4211da177e4SLinus Torvalds if ((idev = __in6_dev_get(dev)) == NULL) { 4221da177e4SLinus Torvalds if ((idev = ipv6_add_dev(dev)) == NULL) 4231da177e4SLinus Torvalds return NULL; 4241da177e4SLinus Torvalds } 425c5e33bddSYOSHIFUJI Hideaki 4261da177e4SLinus Torvalds if (dev->flags&IFF_UP) 4271da177e4SLinus Torvalds ipv6_mc_up(idev); 4281da177e4SLinus Torvalds return idev; 4291da177e4SLinus Torvalds } 4301da177e4SLinus Torvalds 4311da177e4SLinus Torvalds #ifdef CONFIG_SYSCTL 4321da177e4SLinus Torvalds static void dev_forward_change(struct inet6_dev *idev) 4331da177e4SLinus Torvalds { 4341da177e4SLinus Torvalds struct net_device *dev; 4351da177e4SLinus Torvalds struct inet6_ifaddr *ifa; 4361da177e4SLinus Torvalds struct in6_addr addr; 4371da177e4SLinus Torvalds 4381da177e4SLinus Torvalds if (!idev) 4391da177e4SLinus Torvalds return; 4401da177e4SLinus Torvalds dev = idev->dev; 4411da177e4SLinus Torvalds if (dev && (dev->flags & IFF_MULTICAST)) { 4421da177e4SLinus Torvalds ipv6_addr_all_routers(&addr); 4431da177e4SLinus Torvalds 4441da177e4SLinus Torvalds if (idev->cnf.forwarding) 4451da177e4SLinus Torvalds ipv6_dev_mc_inc(dev, &addr); 4461da177e4SLinus Torvalds else 4471da177e4SLinus Torvalds ipv6_dev_mc_dec(dev, &addr); 4481da177e4SLinus Torvalds } 4491da177e4SLinus Torvalds for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) { 4502c12a74cSMichal Wrobel if (ifa->flags&IFA_F_TENTATIVE) 4512c12a74cSMichal Wrobel continue; 4521da177e4SLinus Torvalds if (idev->cnf.forwarding) 4531da177e4SLinus Torvalds addrconf_join_anycast(ifa); 4541da177e4SLinus Torvalds else 4551da177e4SLinus Torvalds addrconf_leave_anycast(ifa); 4561da177e4SLinus Torvalds } 4571da177e4SLinus Torvalds } 4581da177e4SLinus Torvalds 4591da177e4SLinus Torvalds 4601da177e4SLinus Torvalds static void addrconf_forward_change(void) 4611da177e4SLinus Torvalds { 4621da177e4SLinus Torvalds struct net_device *dev; 4631da177e4SLinus Torvalds struct inet6_dev *idev; 4641da177e4SLinus Torvalds 4651da177e4SLinus Torvalds read_lock(&dev_base_lock); 466881d966bSEric W. Biederman for_each_netdev(&init_net, dev) { 4678814c4b5SYOSHIFUJI Hideaki rcu_read_lock(); 4681da177e4SLinus Torvalds idev = __in6_dev_get(dev); 4691da177e4SLinus Torvalds if (idev) { 4701da177e4SLinus Torvalds int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding); 4711da177e4SLinus Torvalds idev->cnf.forwarding = ipv6_devconf.forwarding; 4721da177e4SLinus Torvalds if (changed) 4731da177e4SLinus Torvalds dev_forward_change(idev); 4741da177e4SLinus Torvalds } 4758814c4b5SYOSHIFUJI Hideaki rcu_read_unlock(); 4761da177e4SLinus Torvalds } 4771da177e4SLinus Torvalds read_unlock(&dev_base_lock); 4781da177e4SLinus Torvalds } 4791da177e4SLinus Torvalds #endif 4801da177e4SLinus Torvalds 4811da177e4SLinus Torvalds /* Nobody refers to this ifaddr, destroy it */ 4821da177e4SLinus Torvalds 4831da177e4SLinus Torvalds void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) 4841da177e4SLinus Torvalds { 4851da177e4SLinus Torvalds BUG_TRAP(ifp->if_next==NULL); 4861da177e4SLinus Torvalds BUG_TRAP(ifp->lst_next==NULL); 4871da177e4SLinus Torvalds #ifdef NET_REFCNT_DEBUG 4881da177e4SLinus Torvalds printk(KERN_DEBUG "inet6_ifa_finish_destroy\n"); 4891da177e4SLinus Torvalds #endif 4901da177e4SLinus Torvalds 4911da177e4SLinus Torvalds in6_dev_put(ifp->idev); 4921da177e4SLinus Torvalds 4931da177e4SLinus Torvalds if (del_timer(&ifp->timer)) 4941da177e4SLinus Torvalds printk("Timer is still running, when freeing ifa=%p\n", ifp); 4951da177e4SLinus Torvalds 4961da177e4SLinus Torvalds if (!ifp->dead) { 4971da177e4SLinus Torvalds printk("Freeing alive inet6 address %p\n", ifp); 4981da177e4SLinus Torvalds return; 4991da177e4SLinus Torvalds } 5001da177e4SLinus Torvalds dst_release(&ifp->rt->u.dst); 5011da177e4SLinus Torvalds 5021da177e4SLinus Torvalds kfree(ifp); 5031da177e4SLinus Torvalds } 5041da177e4SLinus Torvalds 505e55ffac6SBrian Haley static void 506e55ffac6SBrian Haley ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) 507e55ffac6SBrian Haley { 508e55ffac6SBrian Haley struct inet6_ifaddr *ifa, **ifap; 5098a6ce0c0SYOSHIFUJI Hideaki int ifp_scope = ipv6_addr_src_scope(&ifp->addr); 510e55ffac6SBrian Haley 511e55ffac6SBrian Haley /* 512e55ffac6SBrian Haley * Each device address list is sorted in order of scope - 513e55ffac6SBrian Haley * global before linklocal. 514e55ffac6SBrian Haley */ 515e55ffac6SBrian Haley for (ifap = &idev->addr_list; (ifa = *ifap) != NULL; 516e55ffac6SBrian Haley ifap = &ifa->if_next) { 5178a6ce0c0SYOSHIFUJI Hideaki if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) 518e55ffac6SBrian Haley break; 519e55ffac6SBrian Haley } 520e55ffac6SBrian Haley 521e55ffac6SBrian Haley ifp->if_next = *ifap; 522e55ffac6SBrian Haley *ifap = ifp; 523e55ffac6SBrian Haley } 524e55ffac6SBrian Haley 5251da177e4SLinus Torvalds /* On success it returns ifp with increased reference count */ 5261da177e4SLinus Torvalds 5271da177e4SLinus Torvalds static struct inet6_ifaddr * 5281da177e4SLinus Torvalds ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, 529e431b8c0SJamal Hadi Salim int scope, u32 flags) 5301da177e4SLinus Torvalds { 5311da177e4SLinus Torvalds struct inet6_ifaddr *ifa = NULL; 5321da177e4SLinus Torvalds struct rt6_info *rt; 5331da177e4SLinus Torvalds int hash; 5341da177e4SLinus Torvalds int err = 0; 5351da177e4SLinus Torvalds 5368814c4b5SYOSHIFUJI Hideaki rcu_read_lock_bh(); 5371da177e4SLinus Torvalds if (idev->dead) { 5381da177e4SLinus Torvalds err = -ENODEV; /*XXX*/ 5391da177e4SLinus Torvalds goto out2; 5401da177e4SLinus Torvalds } 5411da177e4SLinus Torvalds 5421da177e4SLinus Torvalds write_lock(&addrconf_hash_lock); 5431da177e4SLinus Torvalds 5441da177e4SLinus Torvalds /* Ignore adding duplicate addresses on an interface */ 5451da177e4SLinus Torvalds if (ipv6_chk_same_addr(addr, idev->dev)) { 5461da177e4SLinus Torvalds ADBG(("ipv6_add_addr: already assigned\n")); 5471da177e4SLinus Torvalds err = -EEXIST; 5481da177e4SLinus Torvalds goto out; 5491da177e4SLinus Torvalds } 5501da177e4SLinus Torvalds 551322f74a4SIngo Oeser ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); 5521da177e4SLinus Torvalds 5531da177e4SLinus Torvalds if (ifa == NULL) { 5541da177e4SLinus Torvalds ADBG(("ipv6_add_addr: malloc failed\n")); 5551da177e4SLinus Torvalds err = -ENOBUFS; 5561da177e4SLinus Torvalds goto out; 5571da177e4SLinus Torvalds } 5581da177e4SLinus Torvalds 5591da177e4SLinus Torvalds rt = addrconf_dst_alloc(idev, addr, 0); 5601da177e4SLinus Torvalds if (IS_ERR(rt)) { 5611da177e4SLinus Torvalds err = PTR_ERR(rt); 5621da177e4SLinus Torvalds goto out; 5631da177e4SLinus Torvalds } 5641da177e4SLinus Torvalds 5651da177e4SLinus Torvalds ipv6_addr_copy(&ifa->addr, addr); 5661da177e4SLinus Torvalds 5671da177e4SLinus Torvalds spin_lock_init(&ifa->lock); 5681da177e4SLinus Torvalds init_timer(&ifa->timer); 5691da177e4SLinus Torvalds ifa->timer.data = (unsigned long) ifa; 5701da177e4SLinus Torvalds ifa->scope = scope; 5711da177e4SLinus Torvalds ifa->prefix_len = pfxlen; 5721da177e4SLinus Torvalds ifa->flags = flags | IFA_F_TENTATIVE; 5731da177e4SLinus Torvalds ifa->cstamp = ifa->tstamp = jiffies; 5741da177e4SLinus Torvalds 57557f5f544SKeir Fraser ifa->rt = rt; 57657f5f544SKeir Fraser 57795c385b4SNeil Horman /* 57895c385b4SNeil Horman * part one of RFC 4429, section 3.3 57995c385b4SNeil Horman * We should not configure an address as 58095c385b4SNeil Horman * optimistic if we do not yet know the link 58195c385b4SNeil Horman * layer address of our nexhop router 58295c385b4SNeil Horman */ 58395c385b4SNeil Horman 58495c385b4SNeil Horman if (rt->rt6i_nexthop == NULL) 58595c385b4SNeil Horman ifa->flags &= ~IFA_F_OPTIMISTIC; 58695c385b4SNeil Horman 5871da177e4SLinus Torvalds ifa->idev = idev; 5881da177e4SLinus Torvalds in6_dev_hold(idev); 5891da177e4SLinus Torvalds /* For caller */ 5901da177e4SLinus Torvalds in6_ifa_hold(ifa); 5911da177e4SLinus Torvalds 5921da177e4SLinus Torvalds /* Add to big hash table */ 5931da177e4SLinus Torvalds hash = ipv6_addr_hash(addr); 5941da177e4SLinus Torvalds 5951da177e4SLinus Torvalds ifa->lst_next = inet6_addr_lst[hash]; 5961da177e4SLinus Torvalds inet6_addr_lst[hash] = ifa; 5971da177e4SLinus Torvalds in6_ifa_hold(ifa); 5981da177e4SLinus Torvalds write_unlock(&addrconf_hash_lock); 5991da177e4SLinus Torvalds 6001da177e4SLinus Torvalds write_lock(&idev->lock); 6011da177e4SLinus Torvalds /* Add to inet6_dev unicast addr list. */ 602e55ffac6SBrian Haley ipv6_link_dev_addr(idev, ifa); 6031da177e4SLinus Torvalds 6041da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 6051da177e4SLinus Torvalds if (ifa->flags&IFA_F_TEMPORARY) { 6061da177e4SLinus Torvalds ifa->tmp_next = idev->tempaddr_list; 6071da177e4SLinus Torvalds idev->tempaddr_list = ifa; 6081da177e4SLinus Torvalds in6_ifa_hold(ifa); 6091da177e4SLinus Torvalds } 6101da177e4SLinus Torvalds #endif 6111da177e4SLinus Torvalds 6121da177e4SLinus Torvalds in6_ifa_hold(ifa); 6131da177e4SLinus Torvalds write_unlock(&idev->lock); 6141da177e4SLinus Torvalds out2: 6158814c4b5SYOSHIFUJI Hideaki rcu_read_unlock_bh(); 6161da177e4SLinus Torvalds 617fd92833aSYOSHIFUJI Hideaki if (likely(err == 0)) 618e041c683SAlan Stern atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); 6191da177e4SLinus Torvalds else { 6201da177e4SLinus Torvalds kfree(ifa); 6211da177e4SLinus Torvalds ifa = ERR_PTR(err); 6221da177e4SLinus Torvalds } 6231da177e4SLinus Torvalds 6241da177e4SLinus Torvalds return ifa; 6251da177e4SLinus Torvalds out: 6261da177e4SLinus Torvalds write_unlock(&addrconf_hash_lock); 6271da177e4SLinus Torvalds goto out2; 6281da177e4SLinus Torvalds } 6291da177e4SLinus Torvalds 6301da177e4SLinus Torvalds /* This function wants to get referenced ifp and releases it before return */ 6311da177e4SLinus Torvalds 6321da177e4SLinus Torvalds static void ipv6_del_addr(struct inet6_ifaddr *ifp) 6331da177e4SLinus Torvalds { 6341da177e4SLinus Torvalds struct inet6_ifaddr *ifa, **ifap; 6351da177e4SLinus Torvalds struct inet6_dev *idev = ifp->idev; 6361da177e4SLinus Torvalds int hash; 6371da177e4SLinus Torvalds int deleted = 0, onlink = 0; 6381da177e4SLinus Torvalds unsigned long expires = jiffies; 6391da177e4SLinus Torvalds 6401da177e4SLinus Torvalds hash = ipv6_addr_hash(&ifp->addr); 6411da177e4SLinus Torvalds 6421da177e4SLinus Torvalds ifp->dead = 1; 6431da177e4SLinus Torvalds 6441da177e4SLinus Torvalds write_lock_bh(&addrconf_hash_lock); 6451da177e4SLinus Torvalds for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL; 6461da177e4SLinus Torvalds ifap = &ifa->lst_next) { 6471da177e4SLinus Torvalds if (ifa == ifp) { 6481da177e4SLinus Torvalds *ifap = ifa->lst_next; 6491da177e4SLinus Torvalds __in6_ifa_put(ifp); 6501da177e4SLinus Torvalds ifa->lst_next = NULL; 6511da177e4SLinus Torvalds break; 6521da177e4SLinus Torvalds } 6531da177e4SLinus Torvalds } 6541da177e4SLinus Torvalds write_unlock_bh(&addrconf_hash_lock); 6551da177e4SLinus Torvalds 6561da177e4SLinus Torvalds write_lock_bh(&idev->lock); 6571da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 6581da177e4SLinus Torvalds if (ifp->flags&IFA_F_TEMPORARY) { 6591da177e4SLinus Torvalds for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL; 6601da177e4SLinus Torvalds ifap = &ifa->tmp_next) { 6611da177e4SLinus Torvalds if (ifa == ifp) { 6621da177e4SLinus Torvalds *ifap = ifa->tmp_next; 6631da177e4SLinus Torvalds if (ifp->ifpub) { 6641da177e4SLinus Torvalds in6_ifa_put(ifp->ifpub); 6651da177e4SLinus Torvalds ifp->ifpub = NULL; 6661da177e4SLinus Torvalds } 6671da177e4SLinus Torvalds __in6_ifa_put(ifp); 6681da177e4SLinus Torvalds ifa->tmp_next = NULL; 6691da177e4SLinus Torvalds break; 6701da177e4SLinus Torvalds } 6711da177e4SLinus Torvalds } 6721da177e4SLinus Torvalds } 6731da177e4SLinus Torvalds #endif 6741da177e4SLinus Torvalds 6751d142804SKristian Slavov for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) { 6761da177e4SLinus Torvalds if (ifa == ifp) { 6771da177e4SLinus Torvalds *ifap = ifa->if_next; 6781da177e4SLinus Torvalds __in6_ifa_put(ifp); 6791da177e4SLinus Torvalds ifa->if_next = NULL; 6801da177e4SLinus Torvalds if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) 6811da177e4SLinus Torvalds break; 6821da177e4SLinus Torvalds deleted = 1; 6831d142804SKristian Slavov continue; 6841da177e4SLinus Torvalds } else if (ifp->flags & IFA_F_PERMANENT) { 6851da177e4SLinus Torvalds if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, 6861da177e4SLinus Torvalds ifp->prefix_len)) { 6871da177e4SLinus Torvalds if (ifa->flags & IFA_F_PERMANENT) { 6881da177e4SLinus Torvalds onlink = 1; 6891da177e4SLinus Torvalds if (deleted) 6901da177e4SLinus Torvalds break; 6911da177e4SLinus Torvalds } else { 6921da177e4SLinus Torvalds unsigned long lifetime; 6931da177e4SLinus Torvalds 6941da177e4SLinus Torvalds if (!onlink) 6951da177e4SLinus Torvalds onlink = -1; 6961da177e4SLinus Torvalds 6971da177e4SLinus Torvalds spin_lock(&ifa->lock); 6981da177e4SLinus Torvalds lifetime = min_t(unsigned long, 6991da177e4SLinus Torvalds ifa->valid_lft, 0x7fffffffUL/HZ); 7001da177e4SLinus Torvalds if (time_before(expires, 7011da177e4SLinus Torvalds ifa->tstamp + lifetime * HZ)) 7021da177e4SLinus Torvalds expires = ifa->tstamp + lifetime * HZ; 7031da177e4SLinus Torvalds spin_unlock(&ifa->lock); 7041da177e4SLinus Torvalds } 7051da177e4SLinus Torvalds } 7061da177e4SLinus Torvalds } 7071d142804SKristian Slavov ifap = &ifa->if_next; 7081da177e4SLinus Torvalds } 7091da177e4SLinus Torvalds write_unlock_bh(&idev->lock); 7101da177e4SLinus Torvalds 7111da177e4SLinus Torvalds ipv6_ifa_notify(RTM_DELADDR, ifp); 7121da177e4SLinus Torvalds 713e041c683SAlan Stern atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); 7141da177e4SLinus Torvalds 7151da177e4SLinus Torvalds addrconf_del_timer(ifp); 7161da177e4SLinus Torvalds 7171da177e4SLinus Torvalds /* 7181da177e4SLinus Torvalds * Purge or update corresponding prefix 7191da177e4SLinus Torvalds * 7201da177e4SLinus Torvalds * 1) we don't purge prefix here if address was not permanent. 7211da177e4SLinus Torvalds * prefix is managed by its own lifetime. 7221da177e4SLinus Torvalds * 2) if there're no addresses, delete prefix. 7231da177e4SLinus Torvalds * 3) if there're still other permanent address(es), 7241da177e4SLinus Torvalds * corresponding prefix is still permanent. 7251da177e4SLinus Torvalds * 4) otherwise, update prefix lifetime to the 7261da177e4SLinus Torvalds * longest valid lifetime among the corresponding 7271da177e4SLinus Torvalds * addresses on the device. 7281da177e4SLinus Torvalds * Note: subsequent RA will update lifetime. 7291da177e4SLinus Torvalds * 7301da177e4SLinus Torvalds * --yoshfuji 7311da177e4SLinus Torvalds */ 7321da177e4SLinus Torvalds if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { 7331da177e4SLinus Torvalds struct in6_addr prefix; 7341da177e4SLinus Torvalds struct rt6_info *rt; 7351da177e4SLinus Torvalds 7361da177e4SLinus Torvalds ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); 7371da177e4SLinus Torvalds rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1); 7381da177e4SLinus Torvalds 7391da177e4SLinus Torvalds if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { 7401da177e4SLinus Torvalds if (onlink == 0) { 741e0a1ad73SThomas Graf ip6_del_rt(rt); 7421da177e4SLinus Torvalds rt = NULL; 7431da177e4SLinus Torvalds } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { 7441da177e4SLinus Torvalds rt->rt6i_expires = expires; 7451da177e4SLinus Torvalds rt->rt6i_flags |= RTF_EXPIRES; 7461da177e4SLinus Torvalds } 7471da177e4SLinus Torvalds } 7481da177e4SLinus Torvalds dst_release(&rt->u.dst); 7491da177e4SLinus Torvalds } 7501da177e4SLinus Torvalds 7511da177e4SLinus Torvalds in6_ifa_put(ifp); 7521da177e4SLinus Torvalds } 7531da177e4SLinus Torvalds 7541da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 7551da177e4SLinus Torvalds static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) 7561da177e4SLinus Torvalds { 7571da177e4SLinus Torvalds struct inet6_dev *idev = ifp->idev; 7581da177e4SLinus Torvalds struct in6_addr addr, *tmpaddr; 7591da177e4SLinus Torvalds unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp; 7601da177e4SLinus Torvalds int tmp_plen; 7611da177e4SLinus Torvalds int ret = 0; 7621da177e4SLinus Torvalds int max_addresses; 76395c385b4SNeil Horman u32 addr_flags; 7641da177e4SLinus Torvalds 7651da177e4SLinus Torvalds write_lock(&idev->lock); 7661da177e4SLinus Torvalds if (ift) { 7671da177e4SLinus Torvalds spin_lock_bh(&ift->lock); 7681da177e4SLinus Torvalds memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); 7691da177e4SLinus Torvalds spin_unlock_bh(&ift->lock); 7701da177e4SLinus Torvalds tmpaddr = &addr; 7711da177e4SLinus Torvalds } else { 7721da177e4SLinus Torvalds tmpaddr = NULL; 7731da177e4SLinus Torvalds } 7741da177e4SLinus Torvalds retry: 7751da177e4SLinus Torvalds in6_dev_hold(idev); 7761da177e4SLinus Torvalds if (idev->cnf.use_tempaddr <= 0) { 7771da177e4SLinus Torvalds write_unlock(&idev->lock); 7781da177e4SLinus Torvalds printk(KERN_INFO 7791da177e4SLinus Torvalds "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); 7801da177e4SLinus Torvalds in6_dev_put(idev); 7811da177e4SLinus Torvalds ret = -1; 7821da177e4SLinus Torvalds goto out; 7831da177e4SLinus Torvalds } 7841da177e4SLinus Torvalds spin_lock_bh(&ifp->lock); 7851da177e4SLinus Torvalds if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { 7861da177e4SLinus Torvalds idev->cnf.use_tempaddr = -1; /*XXX*/ 7871da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 7881da177e4SLinus Torvalds write_unlock(&idev->lock); 7891da177e4SLinus Torvalds printk(KERN_WARNING 7901da177e4SLinus Torvalds "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); 7911da177e4SLinus Torvalds in6_dev_put(idev); 7921da177e4SLinus Torvalds ret = -1; 7931da177e4SLinus Torvalds goto out; 7941da177e4SLinus Torvalds } 7951da177e4SLinus Torvalds in6_ifa_hold(ifp); 7961da177e4SLinus Torvalds memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); 7971da177e4SLinus Torvalds if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { 7981da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 7991da177e4SLinus Torvalds write_unlock(&idev->lock); 8001da177e4SLinus Torvalds printk(KERN_WARNING 8011da177e4SLinus Torvalds "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); 8021da177e4SLinus Torvalds in6_ifa_put(ifp); 8031da177e4SLinus Torvalds in6_dev_put(idev); 8041da177e4SLinus Torvalds ret = -1; 8051da177e4SLinus Torvalds goto out; 8061da177e4SLinus Torvalds } 8071da177e4SLinus Torvalds memcpy(&addr.s6_addr[8], idev->rndid, 8); 8081da177e4SLinus Torvalds tmp_valid_lft = min_t(__u32, 8091da177e4SLinus Torvalds ifp->valid_lft, 8101da177e4SLinus Torvalds idev->cnf.temp_valid_lft); 8111da177e4SLinus Torvalds tmp_prefered_lft = min_t(__u32, 8121da177e4SLinus Torvalds ifp->prefered_lft, 8131da177e4SLinus Torvalds idev->cnf.temp_prefered_lft - desync_factor / HZ); 8141da177e4SLinus Torvalds tmp_plen = ifp->prefix_len; 8151da177e4SLinus Torvalds max_addresses = idev->cnf.max_addresses; 8161da177e4SLinus Torvalds tmp_cstamp = ifp->cstamp; 8171da177e4SLinus Torvalds tmp_tstamp = ifp->tstamp; 8181da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 8191da177e4SLinus Torvalds 8201da177e4SLinus Torvalds write_unlock(&idev->lock); 82195c385b4SNeil Horman 82295c385b4SNeil Horman addr_flags = IFA_F_TEMPORARY; 82395c385b4SNeil Horman /* set in addrconf_prefix_rcv() */ 82495c385b4SNeil Horman if (ifp->flags & IFA_F_OPTIMISTIC) 82595c385b4SNeil Horman addr_flags |= IFA_F_OPTIMISTIC; 82695c385b4SNeil Horman 8271da177e4SLinus Torvalds ift = !max_addresses || 8281da177e4SLinus Torvalds ipv6_count_addresses(idev) < max_addresses ? 8291da177e4SLinus Torvalds ipv6_add_addr(idev, &addr, tmp_plen, 83095c385b4SNeil Horman ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, 83195c385b4SNeil Horman addr_flags) : NULL; 8321da177e4SLinus Torvalds if (!ift || IS_ERR(ift)) { 8331da177e4SLinus Torvalds in6_ifa_put(ifp); 8341da177e4SLinus Torvalds in6_dev_put(idev); 8351da177e4SLinus Torvalds printk(KERN_INFO 8361da177e4SLinus Torvalds "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); 8371da177e4SLinus Torvalds tmpaddr = &addr; 8381da177e4SLinus Torvalds write_lock(&idev->lock); 8391da177e4SLinus Torvalds goto retry; 8401da177e4SLinus Torvalds } 8411da177e4SLinus Torvalds 8421da177e4SLinus Torvalds spin_lock_bh(&ift->lock); 8431da177e4SLinus Torvalds ift->ifpub = ifp; 8441da177e4SLinus Torvalds ift->valid_lft = tmp_valid_lft; 8451da177e4SLinus Torvalds ift->prefered_lft = tmp_prefered_lft; 8461da177e4SLinus Torvalds ift->cstamp = tmp_cstamp; 8471da177e4SLinus Torvalds ift->tstamp = tmp_tstamp; 8481da177e4SLinus Torvalds spin_unlock_bh(&ift->lock); 8491da177e4SLinus Torvalds 8501da177e4SLinus Torvalds addrconf_dad_start(ift, 0); 8511da177e4SLinus Torvalds in6_ifa_put(ift); 8521da177e4SLinus Torvalds in6_dev_put(idev); 8531da177e4SLinus Torvalds out: 8541da177e4SLinus Torvalds return ret; 8551da177e4SLinus Torvalds } 8561da177e4SLinus Torvalds #endif 8571da177e4SLinus Torvalds 8581da177e4SLinus Torvalds /* 859072047e4SYOSHIFUJI Hideaki * Choose an appropriate source address (RFC3484) 8601da177e4SLinus Torvalds */ 861072047e4SYOSHIFUJI Hideaki struct ipv6_saddr_score { 862072047e4SYOSHIFUJI Hideaki int addr_type; 863072047e4SYOSHIFUJI Hideaki unsigned int attrs; 864072047e4SYOSHIFUJI Hideaki int matchlen; 8650d27b427SBrian Haley int scope; 866072047e4SYOSHIFUJI Hideaki unsigned int rule; 867072047e4SYOSHIFUJI Hideaki }; 868072047e4SYOSHIFUJI Hideaki 869072047e4SYOSHIFUJI Hideaki #define IPV6_SADDR_SCORE_LOCAL 0x0001 870072047e4SYOSHIFUJI Hideaki #define IPV6_SADDR_SCORE_PREFERRED 0x0004 871072047e4SYOSHIFUJI Hideaki #define IPV6_SADDR_SCORE_HOA 0x0008 872072047e4SYOSHIFUJI Hideaki #define IPV6_SADDR_SCORE_OIF 0x0010 873072047e4SYOSHIFUJI Hideaki #define IPV6_SADDR_SCORE_LABEL 0x0020 874072047e4SYOSHIFUJI Hideaki #define IPV6_SADDR_SCORE_PRIVACY 0x0040 875072047e4SYOSHIFUJI Hideaki 876b6f99a21SDave Jones static inline int ipv6_saddr_preferred(int type) 8771da177e4SLinus Torvalds { 878072047e4SYOSHIFUJI Hideaki if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4| 879072047e4SYOSHIFUJI Hideaki IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED)) 880072047e4SYOSHIFUJI Hideaki return 1; 881072047e4SYOSHIFUJI Hideaki return 0; 8821da177e4SLinus Torvalds } 8831da177e4SLinus Torvalds 884072047e4SYOSHIFUJI Hideaki /* static matching label */ 885b6f99a21SDave Jones static inline int ipv6_saddr_label(const struct in6_addr *addr, int type) 886072047e4SYOSHIFUJI Hideaki { 887072047e4SYOSHIFUJI Hideaki /* 888072047e4SYOSHIFUJI Hideaki * prefix (longest match) label 889072047e4SYOSHIFUJI Hideaki * ----------------------------- 890072047e4SYOSHIFUJI Hideaki * ::1/128 0 891072047e4SYOSHIFUJI Hideaki * ::/0 1 892072047e4SYOSHIFUJI Hideaki * 2002::/16 2 893072047e4SYOSHIFUJI Hideaki * ::/96 3 894072047e4SYOSHIFUJI Hideaki * ::ffff:0:0/96 4 895102128e3SŁukasz Stelmach * fc00::/7 5 896102128e3SŁukasz Stelmach * 2001::/32 6 897072047e4SYOSHIFUJI Hideaki */ 898072047e4SYOSHIFUJI Hideaki if (type & IPV6_ADDR_LOOPBACK) 899072047e4SYOSHIFUJI Hideaki return 0; 900072047e4SYOSHIFUJI Hideaki else if (type & IPV6_ADDR_COMPATv4) 901072047e4SYOSHIFUJI Hideaki return 3; 902072047e4SYOSHIFUJI Hideaki else if (type & IPV6_ADDR_MAPPED) 903072047e4SYOSHIFUJI Hideaki return 4; 904102128e3SŁukasz Stelmach else if (addr->s6_addr32[0] == htonl(0x20010000)) 905102128e3SŁukasz Stelmach return 6; 906072047e4SYOSHIFUJI Hideaki else if (addr->s6_addr16[0] == htons(0x2002)) 907072047e4SYOSHIFUJI Hideaki return 2; 908102128e3SŁukasz Stelmach else if ((addr->s6_addr[0] & 0xfe) == 0xfc) 909102128e3SŁukasz Stelmach return 5; 910072047e4SYOSHIFUJI Hideaki return 1; 911072047e4SYOSHIFUJI Hideaki } 9121da177e4SLinus Torvalds 913072047e4SYOSHIFUJI Hideaki int ipv6_dev_get_saddr(struct net_device *daddr_dev, 9141da177e4SLinus Torvalds struct in6_addr *daddr, struct in6_addr *saddr) 9151da177e4SLinus Torvalds { 916072047e4SYOSHIFUJI Hideaki struct ipv6_saddr_score hiscore; 917072047e4SYOSHIFUJI Hideaki struct inet6_ifaddr *ifa_result = NULL; 918072047e4SYOSHIFUJI Hideaki int daddr_type = __ipv6_addr_type(daddr); 919072047e4SYOSHIFUJI Hideaki int daddr_scope = __ipv6_addr_src_scope(daddr_type); 920072047e4SYOSHIFUJI Hideaki u32 daddr_label = ipv6_saddr_label(daddr, daddr_type); 921072047e4SYOSHIFUJI Hideaki struct net_device *dev; 9221da177e4SLinus Torvalds 923072047e4SYOSHIFUJI Hideaki memset(&hiscore, 0, sizeof(hiscore)); 9241da177e4SLinus Torvalds 9251da177e4SLinus Torvalds read_lock(&dev_base_lock); 9268814c4b5SYOSHIFUJI Hideaki rcu_read_lock(); 927072047e4SYOSHIFUJI Hideaki 928881d966bSEric W. Biederman for_each_netdev(&init_net, dev) { 929072047e4SYOSHIFUJI Hideaki struct inet6_dev *idev; 930072047e4SYOSHIFUJI Hideaki struct inet6_ifaddr *ifa; 931072047e4SYOSHIFUJI Hideaki 932072047e4SYOSHIFUJI Hideaki /* Rule 0: Candidate Source Address (section 4) 933072047e4SYOSHIFUJI Hideaki * - multicast and link-local destination address, 934072047e4SYOSHIFUJI Hideaki * the set of candidate source address MUST only 935072047e4SYOSHIFUJI Hideaki * include addresses assigned to interfaces 936072047e4SYOSHIFUJI Hideaki * belonging to the same link as the outgoing 937072047e4SYOSHIFUJI Hideaki * interface. 938072047e4SYOSHIFUJI Hideaki * (- For site-local destination addresses, the 939072047e4SYOSHIFUJI Hideaki * set of candidate source addresses MUST only 940072047e4SYOSHIFUJI Hideaki * include addresses assigned to interfaces 941072047e4SYOSHIFUJI Hideaki * belonging to the same site as the outgoing 942072047e4SYOSHIFUJI Hideaki * interface.) 943072047e4SYOSHIFUJI Hideaki */ 944072047e4SYOSHIFUJI Hideaki if ((daddr_type & IPV6_ADDR_MULTICAST || 945072047e4SYOSHIFUJI Hideaki daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && 946072047e4SYOSHIFUJI Hideaki daddr_dev && dev != daddr_dev) 947072047e4SYOSHIFUJI Hideaki continue; 948072047e4SYOSHIFUJI Hideaki 9491da177e4SLinus Torvalds idev = __in6_dev_get(dev); 950072047e4SYOSHIFUJI Hideaki if (!idev) 951072047e4SYOSHIFUJI Hideaki continue; 952072047e4SYOSHIFUJI Hideaki 9531da177e4SLinus Torvalds read_lock_bh(&idev->lock); 954072047e4SYOSHIFUJI Hideaki for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) { 955072047e4SYOSHIFUJI Hideaki struct ipv6_saddr_score score; 956072047e4SYOSHIFUJI Hideaki 957072047e4SYOSHIFUJI Hideaki score.addr_type = __ipv6_addr_type(&ifa->addr); 958072047e4SYOSHIFUJI Hideaki 9596b3ae80aSYOSHIFUJI Hideaki /* Rule 0: 9606b3ae80aSYOSHIFUJI Hideaki * - Tentative Address (RFC2462 section 5.4) 9616b3ae80aSYOSHIFUJI Hideaki * - A tentative address is not considered 9626b3ae80aSYOSHIFUJI Hideaki * "assigned to an interface" in the traditional 96395c385b4SNeil Horman * sense, unless it is also flagged as optimistic. 9646b3ae80aSYOSHIFUJI Hideaki * - Candidate Source Address (section 4) 965072047e4SYOSHIFUJI Hideaki * - In any case, anycast addresses, multicast 966072047e4SYOSHIFUJI Hideaki * addresses, and the unspecified address MUST 967072047e4SYOSHIFUJI Hideaki * NOT be included in a candidate set. 968072047e4SYOSHIFUJI Hideaki */ 96995c385b4SNeil Horman if ((ifa->flags & IFA_F_TENTATIVE) && 97095c385b4SNeil Horman (!(ifa->flags & IFA_F_OPTIMISTIC))) 9716b3ae80aSYOSHIFUJI Hideaki continue; 972072047e4SYOSHIFUJI Hideaki if (unlikely(score.addr_type == IPV6_ADDR_ANY || 973072047e4SYOSHIFUJI Hideaki score.addr_type & IPV6_ADDR_MULTICAST)) { 974072047e4SYOSHIFUJI Hideaki LIMIT_NETDEBUG(KERN_DEBUG 975072047e4SYOSHIFUJI Hideaki "ADDRCONF: unspecified / multicast address" 976072047e4SYOSHIFUJI Hideaki "assigned as unicast address on %s", 977072047e4SYOSHIFUJI Hideaki dev->name); 9781da177e4SLinus Torvalds continue; 979072047e4SYOSHIFUJI Hideaki } 980072047e4SYOSHIFUJI Hideaki 981072047e4SYOSHIFUJI Hideaki score.attrs = 0; 982072047e4SYOSHIFUJI Hideaki score.matchlen = 0; 983072047e4SYOSHIFUJI Hideaki score.scope = 0; 984072047e4SYOSHIFUJI Hideaki score.rule = 0; 985072047e4SYOSHIFUJI Hideaki 986072047e4SYOSHIFUJI Hideaki if (ifa_result == NULL) { 987072047e4SYOSHIFUJI Hideaki /* record it if the first available entry */ 988072047e4SYOSHIFUJI Hideaki goto record_it; 989072047e4SYOSHIFUJI Hideaki } 990072047e4SYOSHIFUJI Hideaki 991072047e4SYOSHIFUJI Hideaki /* Rule 1: Prefer same address */ 992072047e4SYOSHIFUJI Hideaki if (hiscore.rule < 1) { 993072047e4SYOSHIFUJI Hideaki if (ipv6_addr_equal(&ifa_result->addr, daddr)) 994072047e4SYOSHIFUJI Hideaki hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL; 995072047e4SYOSHIFUJI Hideaki hiscore.rule++; 996072047e4SYOSHIFUJI Hideaki } 997072047e4SYOSHIFUJI Hideaki if (ipv6_addr_equal(&ifa->addr, daddr)) { 998072047e4SYOSHIFUJI Hideaki score.attrs |= IPV6_SADDR_SCORE_LOCAL; 999072047e4SYOSHIFUJI Hideaki if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) { 1000072047e4SYOSHIFUJI Hideaki score.rule = 1; 1001072047e4SYOSHIFUJI Hideaki goto record_it; 1002072047e4SYOSHIFUJI Hideaki } 1003072047e4SYOSHIFUJI Hideaki } else { 1004072047e4SYOSHIFUJI Hideaki if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL) 1005072047e4SYOSHIFUJI Hideaki continue; 1006072047e4SYOSHIFUJI Hideaki } 1007072047e4SYOSHIFUJI Hideaki 1008072047e4SYOSHIFUJI Hideaki /* Rule 2: Prefer appropriate scope */ 1009072047e4SYOSHIFUJI Hideaki if (hiscore.rule < 2) { 1010072047e4SYOSHIFUJI Hideaki hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type); 1011072047e4SYOSHIFUJI Hideaki hiscore.rule++; 1012072047e4SYOSHIFUJI Hideaki } 1013072047e4SYOSHIFUJI Hideaki score.scope = __ipv6_addr_src_scope(score.addr_type); 1014072047e4SYOSHIFUJI Hideaki if (hiscore.scope < score.scope) { 1015072047e4SYOSHIFUJI Hideaki if (hiscore.scope < daddr_scope) { 1016072047e4SYOSHIFUJI Hideaki score.rule = 2; 1017072047e4SYOSHIFUJI Hideaki goto record_it; 1018072047e4SYOSHIFUJI Hideaki } else 1019072047e4SYOSHIFUJI Hideaki continue; 1020072047e4SYOSHIFUJI Hideaki } else if (score.scope < hiscore.scope) { 1021072047e4SYOSHIFUJI Hideaki if (score.scope < daddr_scope) 1022e55ffac6SBrian Haley break; /* addresses sorted by scope */ 1023072047e4SYOSHIFUJI Hideaki else { 1024072047e4SYOSHIFUJI Hideaki score.rule = 2; 1025072047e4SYOSHIFUJI Hideaki goto record_it; 1026072047e4SYOSHIFUJI Hideaki } 1027072047e4SYOSHIFUJI Hideaki } 1028072047e4SYOSHIFUJI Hideaki 102995c385b4SNeil Horman /* Rule 3: Avoid deprecated and optimistic addresses */ 1030072047e4SYOSHIFUJI Hideaki if (hiscore.rule < 3) { 1031072047e4SYOSHIFUJI Hideaki if (ipv6_saddr_preferred(hiscore.addr_type) || 103295c385b4SNeil Horman (((ifa_result->flags & 103395c385b4SNeil Horman (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0))) 1034072047e4SYOSHIFUJI Hideaki hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED; 1035072047e4SYOSHIFUJI Hideaki hiscore.rule++; 1036072047e4SYOSHIFUJI Hideaki } 1037072047e4SYOSHIFUJI Hideaki if (ipv6_saddr_preferred(score.addr_type) || 10386ae5f983SJiri Kosina (((ifa->flags & 103995c385b4SNeil Horman (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0))) { 1040072047e4SYOSHIFUJI Hideaki score.attrs |= IPV6_SADDR_SCORE_PREFERRED; 1041072047e4SYOSHIFUJI Hideaki if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) { 1042072047e4SYOSHIFUJI Hideaki score.rule = 3; 1043072047e4SYOSHIFUJI Hideaki goto record_it; 1044072047e4SYOSHIFUJI Hideaki } 1045072047e4SYOSHIFUJI Hideaki } else { 1046072047e4SYOSHIFUJI Hideaki if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED) 1047072047e4SYOSHIFUJI Hideaki continue; 1048072047e4SYOSHIFUJI Hideaki } 1049072047e4SYOSHIFUJI Hideaki 10503b9f9a1cSNoriaki TAKAMIYA /* Rule 4: Prefer home address */ 105159fbb3a6SMasahide NAKAMURA #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) 10523b9f9a1cSNoriaki TAKAMIYA if (hiscore.rule < 4) { 10533b9f9a1cSNoriaki TAKAMIYA if (ifa_result->flags & IFA_F_HOMEADDRESS) 10543b9f9a1cSNoriaki TAKAMIYA hiscore.attrs |= IPV6_SADDR_SCORE_HOA; 10553b9f9a1cSNoriaki TAKAMIYA hiscore.rule++; 10563b9f9a1cSNoriaki TAKAMIYA } 10573b9f9a1cSNoriaki TAKAMIYA if (ifa->flags & IFA_F_HOMEADDRESS) { 10583b9f9a1cSNoriaki TAKAMIYA score.attrs |= IPV6_SADDR_SCORE_HOA; 10593b9f9a1cSNoriaki TAKAMIYA if (!(ifa_result->flags & IFA_F_HOMEADDRESS)) { 10603b9f9a1cSNoriaki TAKAMIYA score.rule = 4; 10613b9f9a1cSNoriaki TAKAMIYA goto record_it; 10623b9f9a1cSNoriaki TAKAMIYA } 10633b9f9a1cSNoriaki TAKAMIYA } else { 10643b9f9a1cSNoriaki TAKAMIYA if (hiscore.attrs & IPV6_SADDR_SCORE_HOA) 10653b9f9a1cSNoriaki TAKAMIYA continue; 10663b9f9a1cSNoriaki TAKAMIYA } 10673b9f9a1cSNoriaki TAKAMIYA #else 1068220bbd74SYOSHIFUJI Hideaki if (hiscore.rule < 4) 1069220bbd74SYOSHIFUJI Hideaki hiscore.rule++; 10703b9f9a1cSNoriaki TAKAMIYA #endif 1071072047e4SYOSHIFUJI Hideaki 1072072047e4SYOSHIFUJI Hideaki /* Rule 5: Prefer outgoing interface */ 1073072047e4SYOSHIFUJI Hideaki if (hiscore.rule < 5) { 1074072047e4SYOSHIFUJI Hideaki if (daddr_dev == NULL || 1075072047e4SYOSHIFUJI Hideaki daddr_dev == ifa_result->idev->dev) 1076072047e4SYOSHIFUJI Hideaki hiscore.attrs |= IPV6_SADDR_SCORE_OIF; 1077072047e4SYOSHIFUJI Hideaki hiscore.rule++; 1078072047e4SYOSHIFUJI Hideaki } 1079072047e4SYOSHIFUJI Hideaki if (daddr_dev == NULL || 1080072047e4SYOSHIFUJI Hideaki daddr_dev == ifa->idev->dev) { 1081072047e4SYOSHIFUJI Hideaki score.attrs |= IPV6_SADDR_SCORE_OIF; 1082072047e4SYOSHIFUJI Hideaki if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) { 1083072047e4SYOSHIFUJI Hideaki score.rule = 5; 1084072047e4SYOSHIFUJI Hideaki goto record_it; 1085072047e4SYOSHIFUJI Hideaki } 1086072047e4SYOSHIFUJI Hideaki } else { 1087072047e4SYOSHIFUJI Hideaki if (hiscore.attrs & IPV6_SADDR_SCORE_OIF) 1088072047e4SYOSHIFUJI Hideaki continue; 1089072047e4SYOSHIFUJI Hideaki } 1090072047e4SYOSHIFUJI Hideaki 1091072047e4SYOSHIFUJI Hideaki /* Rule 6: Prefer matching label */ 1092072047e4SYOSHIFUJI Hideaki if (hiscore.rule < 6) { 1093072047e4SYOSHIFUJI Hideaki if (ipv6_saddr_label(&ifa_result->addr, hiscore.addr_type) == daddr_label) 1094072047e4SYOSHIFUJI Hideaki hiscore.attrs |= IPV6_SADDR_SCORE_LABEL; 1095072047e4SYOSHIFUJI Hideaki hiscore.rule++; 1096072047e4SYOSHIFUJI Hideaki } 1097072047e4SYOSHIFUJI Hideaki if (ipv6_saddr_label(&ifa->addr, score.addr_type) == daddr_label) { 1098072047e4SYOSHIFUJI Hideaki score.attrs |= IPV6_SADDR_SCORE_LABEL; 1099072047e4SYOSHIFUJI Hideaki if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) { 1100072047e4SYOSHIFUJI Hideaki score.rule = 6; 1101072047e4SYOSHIFUJI Hideaki goto record_it; 1102072047e4SYOSHIFUJI Hideaki } 1103072047e4SYOSHIFUJI Hideaki } else { 1104072047e4SYOSHIFUJI Hideaki if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL) 1105072047e4SYOSHIFUJI Hideaki continue; 1106072047e4SYOSHIFUJI Hideaki } 1107072047e4SYOSHIFUJI Hideaki 110844fd0261SPeter Chubb #ifdef CONFIG_IPV6_PRIVACY 1109072047e4SYOSHIFUJI Hideaki /* Rule 7: Prefer public address 1110072047e4SYOSHIFUJI Hideaki * Note: prefer temprary address if use_tempaddr >= 2 1111072047e4SYOSHIFUJI Hideaki */ 1112072047e4SYOSHIFUJI Hideaki if (hiscore.rule < 7) { 1113072047e4SYOSHIFUJI Hideaki if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^ 1114072047e4SYOSHIFUJI Hideaki (ifa_result->idev->cnf.use_tempaddr >= 2)) 1115072047e4SYOSHIFUJI Hideaki hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY; 1116072047e4SYOSHIFUJI Hideaki hiscore.rule++; 1117072047e4SYOSHIFUJI Hideaki } 1118072047e4SYOSHIFUJI Hideaki if ((!(ifa->flags & IFA_F_TEMPORARY)) ^ 1119072047e4SYOSHIFUJI Hideaki (ifa->idev->cnf.use_tempaddr >= 2)) { 1120072047e4SYOSHIFUJI Hideaki score.attrs |= IPV6_SADDR_SCORE_PRIVACY; 1121072047e4SYOSHIFUJI Hideaki if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) { 1122072047e4SYOSHIFUJI Hideaki score.rule = 7; 1123072047e4SYOSHIFUJI Hideaki goto record_it; 1124072047e4SYOSHIFUJI Hideaki } 1125072047e4SYOSHIFUJI Hideaki } else { 1126072047e4SYOSHIFUJI Hideaki if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY) 1127072047e4SYOSHIFUJI Hideaki continue; 1128072047e4SYOSHIFUJI Hideaki } 11295e2707faSYOSHIFUJI Hideaki #else 11305e2707faSYOSHIFUJI Hideaki if (hiscore.rule < 7) 11315e2707faSYOSHIFUJI Hideaki hiscore.rule++; 113244fd0261SPeter Chubb #endif 1133072047e4SYOSHIFUJI Hideaki /* Rule 8: Use longest matching prefix */ 113412da2a43SYan Zheng if (hiscore.rule < 8) { 1135072047e4SYOSHIFUJI Hideaki hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr); 113612da2a43SYan Zheng hiscore.rule++; 113712da2a43SYan Zheng } 1138072047e4SYOSHIFUJI Hideaki score.matchlen = ipv6_addr_diff(&ifa->addr, daddr); 1139072047e4SYOSHIFUJI Hideaki if (score.matchlen > hiscore.matchlen) { 1140072047e4SYOSHIFUJI Hideaki score.rule = 8; 1141072047e4SYOSHIFUJI Hideaki goto record_it; 1142072047e4SYOSHIFUJI Hideaki } 1143072047e4SYOSHIFUJI Hideaki #if 0 1144072047e4SYOSHIFUJI Hideaki else if (score.matchlen < hiscore.matchlen) 1145072047e4SYOSHIFUJI Hideaki continue; 11461da177e4SLinus Torvalds #endif 1147072047e4SYOSHIFUJI Hideaki 1148072047e4SYOSHIFUJI Hideaki /* Final Rule: choose first available one */ 11491da177e4SLinus Torvalds continue; 1150072047e4SYOSHIFUJI Hideaki record_it: 1151072047e4SYOSHIFUJI Hideaki if (ifa_result) 1152072047e4SYOSHIFUJI Hideaki in6_ifa_put(ifa_result); 1153072047e4SYOSHIFUJI Hideaki in6_ifa_hold(ifa); 1154072047e4SYOSHIFUJI Hideaki ifa_result = ifa; 11551da177e4SLinus Torvalds hiscore = score; 11561da177e4SLinus Torvalds } 11571da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 11581da177e4SLinus Torvalds } 11598814c4b5SYOSHIFUJI Hideaki rcu_read_unlock(); 11601da177e4SLinus Torvalds read_unlock(&dev_base_lock); 11611da177e4SLinus Torvalds 1162072047e4SYOSHIFUJI Hideaki if (!ifa_result) 1163072047e4SYOSHIFUJI Hideaki return -EADDRNOTAVAIL; 11641da177e4SLinus Torvalds 1165072047e4SYOSHIFUJI Hideaki ipv6_addr_copy(saddr, &ifa_result->addr); 1166072047e4SYOSHIFUJI Hideaki in6_ifa_put(ifa_result); 1167072047e4SYOSHIFUJI Hideaki return 0; 11681da177e4SLinus Torvalds } 11691da177e4SLinus Torvalds 11701da177e4SLinus Torvalds 11711da177e4SLinus Torvalds int ipv6_get_saddr(struct dst_entry *dst, 11721da177e4SLinus Torvalds struct in6_addr *daddr, struct in6_addr *saddr) 11731da177e4SLinus Torvalds { 11747a3025b1SYOSHIFUJI Hideaki return ipv6_dev_get_saddr(dst ? ip6_dst_idev(dst)->dev : NULL, daddr, saddr); 11751da177e4SLinus Torvalds } 11761da177e4SLinus Torvalds 11777159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(ipv6_get_saddr); 11781da177e4SLinus Torvalds 117995c385b4SNeil Horman int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, 118095c385b4SNeil Horman unsigned char banned_flags) 11811da177e4SLinus Torvalds { 11821da177e4SLinus Torvalds struct inet6_dev *idev; 11831da177e4SLinus Torvalds int err = -EADDRNOTAVAIL; 11841da177e4SLinus Torvalds 11858814c4b5SYOSHIFUJI Hideaki rcu_read_lock(); 11861da177e4SLinus Torvalds if ((idev = __in6_dev_get(dev)) != NULL) { 11871da177e4SLinus Torvalds struct inet6_ifaddr *ifp; 11881da177e4SLinus Torvalds 11891da177e4SLinus Torvalds read_lock_bh(&idev->lock); 11901da177e4SLinus Torvalds for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { 119195c385b4SNeil Horman if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) { 11921da177e4SLinus Torvalds ipv6_addr_copy(addr, &ifp->addr); 11931da177e4SLinus Torvalds err = 0; 11941da177e4SLinus Torvalds break; 11951da177e4SLinus Torvalds } 11961da177e4SLinus Torvalds } 11971da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 11981da177e4SLinus Torvalds } 11998814c4b5SYOSHIFUJI Hideaki rcu_read_unlock(); 12001da177e4SLinus Torvalds return err; 12011da177e4SLinus Torvalds } 12021da177e4SLinus Torvalds 12031da177e4SLinus Torvalds static int ipv6_count_addresses(struct inet6_dev *idev) 12041da177e4SLinus Torvalds { 12051da177e4SLinus Torvalds int cnt = 0; 12061da177e4SLinus Torvalds struct inet6_ifaddr *ifp; 12071da177e4SLinus Torvalds 12081da177e4SLinus Torvalds read_lock_bh(&idev->lock); 12091da177e4SLinus Torvalds for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) 12101da177e4SLinus Torvalds cnt++; 12111da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 12121da177e4SLinus Torvalds return cnt; 12131da177e4SLinus Torvalds } 12141da177e4SLinus Torvalds 12151da177e4SLinus Torvalds int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict) 12161da177e4SLinus Torvalds { 12171da177e4SLinus Torvalds struct inet6_ifaddr * ifp; 12181da177e4SLinus Torvalds u8 hash = ipv6_addr_hash(addr); 12191da177e4SLinus Torvalds 12201da177e4SLinus Torvalds read_lock_bh(&addrconf_hash_lock); 12211da177e4SLinus Torvalds for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { 12221da177e4SLinus Torvalds if (ipv6_addr_equal(&ifp->addr, addr) && 12231da177e4SLinus Torvalds !(ifp->flags&IFA_F_TENTATIVE)) { 12241da177e4SLinus Torvalds if (dev == NULL || ifp->idev->dev == dev || 12251da177e4SLinus Torvalds !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) 12261da177e4SLinus Torvalds break; 12271da177e4SLinus Torvalds } 12281da177e4SLinus Torvalds } 12291da177e4SLinus Torvalds read_unlock_bh(&addrconf_hash_lock); 12301da177e4SLinus Torvalds return ifp != NULL; 12311da177e4SLinus Torvalds } 12321da177e4SLinus Torvalds 12337159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(ipv6_chk_addr); 12347159039aSYOSHIFUJI Hideaki 12351da177e4SLinus Torvalds static 12361da177e4SLinus Torvalds int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev) 12371da177e4SLinus Torvalds { 12381da177e4SLinus Torvalds struct inet6_ifaddr * ifp; 12391da177e4SLinus Torvalds u8 hash = ipv6_addr_hash(addr); 12401da177e4SLinus Torvalds 12411da177e4SLinus Torvalds for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { 12421da177e4SLinus Torvalds if (ipv6_addr_equal(&ifp->addr, addr)) { 12431da177e4SLinus Torvalds if (dev == NULL || ifp->idev->dev == dev) 12441da177e4SLinus Torvalds break; 12451da177e4SLinus Torvalds } 12461da177e4SLinus Torvalds } 12471da177e4SLinus Torvalds return ifp != NULL; 12481da177e4SLinus Torvalds } 12491da177e4SLinus Torvalds 12501da177e4SLinus Torvalds struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict) 12511da177e4SLinus Torvalds { 12521da177e4SLinus Torvalds struct inet6_ifaddr * ifp; 12531da177e4SLinus Torvalds u8 hash = ipv6_addr_hash(addr); 12541da177e4SLinus Torvalds 12551da177e4SLinus Torvalds read_lock_bh(&addrconf_hash_lock); 12561da177e4SLinus Torvalds for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { 12571da177e4SLinus Torvalds if (ipv6_addr_equal(&ifp->addr, addr)) { 12581da177e4SLinus Torvalds if (dev == NULL || ifp->idev->dev == dev || 12591da177e4SLinus Torvalds !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { 12601da177e4SLinus Torvalds in6_ifa_hold(ifp); 12611da177e4SLinus Torvalds break; 12621da177e4SLinus Torvalds } 12631da177e4SLinus Torvalds } 12641da177e4SLinus Torvalds } 12651da177e4SLinus Torvalds read_unlock_bh(&addrconf_hash_lock); 12661da177e4SLinus Torvalds 12671da177e4SLinus Torvalds return ifp; 12681da177e4SLinus Torvalds } 12691da177e4SLinus Torvalds 12701da177e4SLinus Torvalds int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) 12711da177e4SLinus Torvalds { 12721da177e4SLinus Torvalds const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; 12730fa1a53eSArnaldo Carvalho de Melo const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); 127482103232SAl Viro __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr; 127582103232SAl Viro __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2); 12761da177e4SLinus Torvalds int sk_ipv6only = ipv6_only_sock(sk); 1277463c84b9SArnaldo Carvalho de Melo int sk2_ipv6only = inet_v6_ipv6only(sk2); 12781da177e4SLinus Torvalds int addr_type = ipv6_addr_type(sk_rcv_saddr6); 12791da177e4SLinus Torvalds int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; 12801da177e4SLinus Torvalds 12811da177e4SLinus Torvalds if (!sk2_rcv_saddr && !sk_ipv6only) 12821da177e4SLinus Torvalds return 1; 12831da177e4SLinus Torvalds 12841da177e4SLinus Torvalds if (addr_type2 == IPV6_ADDR_ANY && 12851da177e4SLinus Torvalds !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) 12861da177e4SLinus Torvalds return 1; 12871da177e4SLinus Torvalds 12881da177e4SLinus Torvalds if (addr_type == IPV6_ADDR_ANY && 12891da177e4SLinus Torvalds !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) 12901da177e4SLinus Torvalds return 1; 12911da177e4SLinus Torvalds 12921da177e4SLinus Torvalds if (sk2_rcv_saddr6 && 12931da177e4SLinus Torvalds ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) 12941da177e4SLinus Torvalds return 1; 12951da177e4SLinus Torvalds 12961da177e4SLinus Torvalds if (addr_type == IPV6_ADDR_MAPPED && 12971da177e4SLinus Torvalds !sk2_ipv6only && 12981da177e4SLinus Torvalds (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr)) 12991da177e4SLinus Torvalds return 1; 13001da177e4SLinus Torvalds 13011da177e4SLinus Torvalds return 0; 13021da177e4SLinus Torvalds } 13031da177e4SLinus Torvalds 13041da177e4SLinus Torvalds /* Gets referenced address, destroys ifaddr */ 13051da177e4SLinus Torvalds 13069f5336e2SAdrian Bunk static void addrconf_dad_stop(struct inet6_ifaddr *ifp) 13071da177e4SLinus Torvalds { 13081da177e4SLinus Torvalds if (ifp->flags&IFA_F_PERMANENT) { 13091da177e4SLinus Torvalds spin_lock_bh(&ifp->lock); 13101da177e4SLinus Torvalds addrconf_del_timer(ifp); 13111da177e4SLinus Torvalds ifp->flags |= IFA_F_TENTATIVE; 13121da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 13131da177e4SLinus Torvalds in6_ifa_put(ifp); 13141da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 13151da177e4SLinus Torvalds } else if (ifp->flags&IFA_F_TEMPORARY) { 13161da177e4SLinus Torvalds struct inet6_ifaddr *ifpub; 13171da177e4SLinus Torvalds spin_lock_bh(&ifp->lock); 13181da177e4SLinus Torvalds ifpub = ifp->ifpub; 13191da177e4SLinus Torvalds if (ifpub) { 13201da177e4SLinus Torvalds in6_ifa_hold(ifpub); 13211da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 13221da177e4SLinus Torvalds ipv6_create_tempaddr(ifpub, ifp); 13231da177e4SLinus Torvalds in6_ifa_put(ifpub); 13241da177e4SLinus Torvalds } else { 13251da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 13261da177e4SLinus Torvalds } 13271da177e4SLinus Torvalds ipv6_del_addr(ifp); 13281da177e4SLinus Torvalds #endif 13291da177e4SLinus Torvalds } else 13301da177e4SLinus Torvalds ipv6_del_addr(ifp); 13311da177e4SLinus Torvalds } 13321da177e4SLinus Torvalds 13333c21edbdSYOSHIFUJI Hideaki void addrconf_dad_failure(struct inet6_ifaddr *ifp) 13343c21edbdSYOSHIFUJI Hideaki { 13353c21edbdSYOSHIFUJI Hideaki if (net_ratelimit()) 13363c21edbdSYOSHIFUJI Hideaki printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name); 13373c21edbdSYOSHIFUJI Hideaki addrconf_dad_stop(ifp); 13383c21edbdSYOSHIFUJI Hideaki } 13391da177e4SLinus Torvalds 13401da177e4SLinus Torvalds /* Join to solicited addr multicast group. */ 13411da177e4SLinus Torvalds 13421da177e4SLinus Torvalds void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) 13431da177e4SLinus Torvalds { 13441da177e4SLinus Torvalds struct in6_addr maddr; 13451da177e4SLinus Torvalds 13461da177e4SLinus Torvalds if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) 13471da177e4SLinus Torvalds return; 13481da177e4SLinus Torvalds 13491da177e4SLinus Torvalds addrconf_addr_solict_mult(addr, &maddr); 13501da177e4SLinus Torvalds ipv6_dev_mc_inc(dev, &maddr); 13511da177e4SLinus Torvalds } 13521da177e4SLinus Torvalds 13531da177e4SLinus Torvalds void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) 13541da177e4SLinus Torvalds { 13551da177e4SLinus Torvalds struct in6_addr maddr; 13561da177e4SLinus Torvalds 13571da177e4SLinus Torvalds if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) 13581da177e4SLinus Torvalds return; 13591da177e4SLinus Torvalds 13601da177e4SLinus Torvalds addrconf_addr_solict_mult(addr, &maddr); 13611da177e4SLinus Torvalds __ipv6_dev_mc_dec(idev, &maddr); 13621da177e4SLinus Torvalds } 13631da177e4SLinus Torvalds 136420380731SArnaldo Carvalho de Melo static void addrconf_join_anycast(struct inet6_ifaddr *ifp) 13651da177e4SLinus Torvalds { 13661da177e4SLinus Torvalds struct in6_addr addr; 13671da177e4SLinus Torvalds ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); 13681da177e4SLinus Torvalds if (ipv6_addr_any(&addr)) 13691da177e4SLinus Torvalds return; 13701da177e4SLinus Torvalds ipv6_dev_ac_inc(ifp->idev->dev, &addr); 13711da177e4SLinus Torvalds } 13721da177e4SLinus Torvalds 137320380731SArnaldo Carvalho de Melo static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) 13741da177e4SLinus Torvalds { 13751da177e4SLinus Torvalds struct in6_addr addr; 13761da177e4SLinus Torvalds ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); 13771da177e4SLinus Torvalds if (ipv6_addr_any(&addr)) 13781da177e4SLinus Torvalds return; 13791da177e4SLinus Torvalds __ipv6_dev_ac_dec(ifp->idev, &addr); 13801da177e4SLinus Torvalds } 13811da177e4SLinus Torvalds 1382073a8e0eSYOSHIFUJI Hideaki static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) 13831da177e4SLinus Torvalds { 13841da177e4SLinus Torvalds if (dev->addr_len != ETH_ALEN) 13851da177e4SLinus Torvalds return -1; 13861da177e4SLinus Torvalds memcpy(eui, dev->dev_addr, 3); 13871da177e4SLinus Torvalds memcpy(eui + 5, dev->dev_addr + 3, 3); 13881da177e4SLinus Torvalds 13891da177e4SLinus Torvalds /* 13901da177e4SLinus Torvalds * The zSeries OSA network cards can be shared among various 13911da177e4SLinus Torvalds * OS instances, but the OSA cards have only one MAC address. 13921da177e4SLinus Torvalds * This leads to duplicate address conflicts in conjunction 13931da177e4SLinus Torvalds * with IPv6 if more than one instance uses the same card. 13941da177e4SLinus Torvalds * 13951da177e4SLinus Torvalds * The driver for these cards can deliver a unique 16-bit 13961da177e4SLinus Torvalds * identifier for each instance sharing the same card. It is 13971da177e4SLinus Torvalds * placed instead of 0xFFFE in the interface identifier. The 13981da177e4SLinus Torvalds * "u" bit of the interface identifier is not inverted in this 13991da177e4SLinus Torvalds * case. Hence the resulting interface identifier has local 14001da177e4SLinus Torvalds * scope according to RFC2373. 14011da177e4SLinus Torvalds */ 14021da177e4SLinus Torvalds if (dev->dev_id) { 14031da177e4SLinus Torvalds eui[3] = (dev->dev_id >> 8) & 0xFF; 14041da177e4SLinus Torvalds eui[4] = dev->dev_id & 0xFF; 14051da177e4SLinus Torvalds } else { 14061da177e4SLinus Torvalds eui[3] = 0xFF; 14071da177e4SLinus Torvalds eui[4] = 0xFE; 14081da177e4SLinus Torvalds eui[0] ^= 2; 14091da177e4SLinus Torvalds } 14101da177e4SLinus Torvalds return 0; 1411073a8e0eSYOSHIFUJI Hideaki } 1412073a8e0eSYOSHIFUJI Hideaki 1413073a8e0eSYOSHIFUJI Hideaki static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) 1414073a8e0eSYOSHIFUJI Hideaki { 14151da177e4SLinus Torvalds /* XXX: inherit EUI-64 from other interface -- yoshfuji */ 14161da177e4SLinus Torvalds if (dev->addr_len != ARCNET_ALEN) 14171da177e4SLinus Torvalds return -1; 14181da177e4SLinus Torvalds memset(eui, 0, 7); 14191da177e4SLinus Torvalds eui[7] = *(u8*)dev->dev_addr; 14201da177e4SLinus Torvalds return 0; 1421073a8e0eSYOSHIFUJI Hideaki } 1422073a8e0eSYOSHIFUJI Hideaki 1423073a8e0eSYOSHIFUJI Hideaki static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) 1424073a8e0eSYOSHIFUJI Hideaki { 14251da177e4SLinus Torvalds if (dev->addr_len != INFINIBAND_ALEN) 14261da177e4SLinus Torvalds return -1; 14271da177e4SLinus Torvalds memcpy(eui, dev->dev_addr + 12, 8); 14281da177e4SLinus Torvalds eui[0] |= 2; 14291da177e4SLinus Torvalds return 0; 14301da177e4SLinus Torvalds } 1431073a8e0eSYOSHIFUJI Hideaki 1432073a8e0eSYOSHIFUJI Hideaki static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) 1433073a8e0eSYOSHIFUJI Hideaki { 1434073a8e0eSYOSHIFUJI Hideaki switch (dev->type) { 1435073a8e0eSYOSHIFUJI Hideaki case ARPHRD_ETHER: 1436073a8e0eSYOSHIFUJI Hideaki case ARPHRD_FDDI: 1437073a8e0eSYOSHIFUJI Hideaki case ARPHRD_IEEE802_TR: 1438073a8e0eSYOSHIFUJI Hideaki return addrconf_ifid_eui48(eui, dev); 1439073a8e0eSYOSHIFUJI Hideaki case ARPHRD_ARCNET: 1440073a8e0eSYOSHIFUJI Hideaki return addrconf_ifid_arcnet(eui, dev); 1441073a8e0eSYOSHIFUJI Hideaki case ARPHRD_INFINIBAND: 1442073a8e0eSYOSHIFUJI Hideaki return addrconf_ifid_infiniband(eui, dev); 1443073a8e0eSYOSHIFUJI Hideaki } 14441da177e4SLinus Torvalds return -1; 14451da177e4SLinus Torvalds } 14461da177e4SLinus Torvalds 14471da177e4SLinus Torvalds static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) 14481da177e4SLinus Torvalds { 14491da177e4SLinus Torvalds int err = -1; 14501da177e4SLinus Torvalds struct inet6_ifaddr *ifp; 14511da177e4SLinus Torvalds 14521da177e4SLinus Torvalds read_lock_bh(&idev->lock); 14531da177e4SLinus Torvalds for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { 14541da177e4SLinus Torvalds if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { 14551da177e4SLinus Torvalds memcpy(eui, ifp->addr.s6_addr+8, 8); 14561da177e4SLinus Torvalds err = 0; 14571da177e4SLinus Torvalds break; 14581da177e4SLinus Torvalds } 14591da177e4SLinus Torvalds } 14601da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 14611da177e4SLinus Torvalds return err; 14621da177e4SLinus Torvalds } 14631da177e4SLinus Torvalds 14641da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 14651da177e4SLinus Torvalds /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ 14661da177e4SLinus Torvalds static int __ipv6_regen_rndid(struct inet6_dev *idev) 14671da177e4SLinus Torvalds { 14681da177e4SLinus Torvalds regen: 1469955189efSYOSHIFUJI Hideaki get_random_bytes(idev->rndid, sizeof(idev->rndid)); 14701da177e4SLinus Torvalds idev->rndid[0] &= ~0x02; 14711da177e4SLinus Torvalds 14721da177e4SLinus Torvalds /* 14731da177e4SLinus Torvalds * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: 14741da177e4SLinus Torvalds * check if generated address is not inappropriate 14751da177e4SLinus Torvalds * 14761da177e4SLinus Torvalds * - Reserved subnet anycast (RFC 2526) 14771da177e4SLinus Torvalds * 11111101 11....11 1xxxxxxx 14781da177e4SLinus Torvalds * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1 14791da177e4SLinus Torvalds * 00-00-5E-FE-xx-xx-xx-xx 14801da177e4SLinus Torvalds * - value 0 14811da177e4SLinus Torvalds * - XXX: already assigned to an address on the device 14821da177e4SLinus Torvalds */ 14831da177e4SLinus Torvalds if (idev->rndid[0] == 0xfd && 14841da177e4SLinus Torvalds (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && 14851da177e4SLinus Torvalds (idev->rndid[7]&0x80)) 14861da177e4SLinus Torvalds goto regen; 14871da177e4SLinus Torvalds if ((idev->rndid[0]|idev->rndid[1]) == 0) { 14881da177e4SLinus Torvalds if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) 14891da177e4SLinus Torvalds goto regen; 14901da177e4SLinus Torvalds if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) 14911da177e4SLinus Torvalds goto regen; 14921da177e4SLinus Torvalds } 14931da177e4SLinus Torvalds 14941da177e4SLinus Torvalds return 0; 14951da177e4SLinus Torvalds } 14961da177e4SLinus Torvalds 14971da177e4SLinus Torvalds static void ipv6_regen_rndid(unsigned long data) 14981da177e4SLinus Torvalds { 14991da177e4SLinus Torvalds struct inet6_dev *idev = (struct inet6_dev *) data; 15001da177e4SLinus Torvalds unsigned long expires; 15011da177e4SLinus Torvalds 15028814c4b5SYOSHIFUJI Hideaki rcu_read_lock_bh(); 15031da177e4SLinus Torvalds write_lock_bh(&idev->lock); 15041da177e4SLinus Torvalds 15051da177e4SLinus Torvalds if (idev->dead) 15061da177e4SLinus Torvalds goto out; 15071da177e4SLinus Torvalds 15081da177e4SLinus Torvalds if (__ipv6_regen_rndid(idev) < 0) 15091da177e4SLinus Torvalds goto out; 15101da177e4SLinus Torvalds 15111da177e4SLinus Torvalds expires = jiffies + 15121da177e4SLinus Torvalds idev->cnf.temp_prefered_lft * HZ - 15131da177e4SLinus Torvalds idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; 15141da177e4SLinus Torvalds if (time_before(expires, jiffies)) { 15151da177e4SLinus Torvalds printk(KERN_WARNING 15161da177e4SLinus Torvalds "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", 15171da177e4SLinus Torvalds idev->dev->name); 15181da177e4SLinus Torvalds goto out; 15191da177e4SLinus Torvalds } 15201da177e4SLinus Torvalds 15211da177e4SLinus Torvalds if (!mod_timer(&idev->regen_timer, expires)) 15221da177e4SLinus Torvalds in6_dev_hold(idev); 15231da177e4SLinus Torvalds 15241da177e4SLinus Torvalds out: 15251da177e4SLinus Torvalds write_unlock_bh(&idev->lock); 15268814c4b5SYOSHIFUJI Hideaki rcu_read_unlock_bh(); 15271da177e4SLinus Torvalds in6_dev_put(idev); 15281da177e4SLinus Torvalds } 15291da177e4SLinus Torvalds 15301da177e4SLinus Torvalds static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { 15311da177e4SLinus Torvalds int ret = 0; 15321da177e4SLinus Torvalds 15331da177e4SLinus Torvalds if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) 15341da177e4SLinus Torvalds ret = __ipv6_regen_rndid(idev); 15351da177e4SLinus Torvalds return ret; 15361da177e4SLinus Torvalds } 15371da177e4SLinus Torvalds #endif 15381da177e4SLinus Torvalds 15391da177e4SLinus Torvalds /* 15401da177e4SLinus Torvalds * Add prefix route. 15411da177e4SLinus Torvalds */ 15421da177e4SLinus Torvalds 15431da177e4SLinus Torvalds static void 15441da177e4SLinus Torvalds addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, 1545e431b8c0SJamal Hadi Salim unsigned long expires, u32 flags) 15461da177e4SLinus Torvalds { 154786872cb5SThomas Graf struct fib6_config cfg = { 154886872cb5SThomas Graf .fc_table = RT6_TABLE_PREFIX, 154986872cb5SThomas Graf .fc_metric = IP6_RT_PRIO_ADDRCONF, 155086872cb5SThomas Graf .fc_ifindex = dev->ifindex, 155186872cb5SThomas Graf .fc_expires = expires, 155286872cb5SThomas Graf .fc_dst_len = plen, 155386872cb5SThomas Graf .fc_flags = RTF_UP | flags, 155486872cb5SThomas Graf }; 15551da177e4SLinus Torvalds 155686872cb5SThomas Graf ipv6_addr_copy(&cfg.fc_dst, pfx); 15571da177e4SLinus Torvalds 15581da177e4SLinus Torvalds /* Prevent useless cloning on PtP SIT. 15591da177e4SLinus Torvalds This thing is done here expecting that the whole 15601da177e4SLinus Torvalds class of non-broadcast devices need not cloning. 15611da177e4SLinus Torvalds */ 15620be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) 15631da177e4SLinus Torvalds if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) 156486872cb5SThomas Graf cfg.fc_flags |= RTF_NONEXTHOP; 15650be669bbSJoerg Roedel #endif 15661da177e4SLinus Torvalds 156786872cb5SThomas Graf ip6_route_add(&cfg); 15681da177e4SLinus Torvalds } 15691da177e4SLinus Torvalds 15701da177e4SLinus Torvalds /* Create "default" multicast route to the interface */ 15711da177e4SLinus Torvalds 15721da177e4SLinus Torvalds static void addrconf_add_mroute(struct net_device *dev) 15731da177e4SLinus Torvalds { 157486872cb5SThomas Graf struct fib6_config cfg = { 157586872cb5SThomas Graf .fc_table = RT6_TABLE_LOCAL, 157686872cb5SThomas Graf .fc_metric = IP6_RT_PRIO_ADDRCONF, 157786872cb5SThomas Graf .fc_ifindex = dev->ifindex, 157886872cb5SThomas Graf .fc_dst_len = 8, 157986872cb5SThomas Graf .fc_flags = RTF_UP, 158086872cb5SThomas Graf }; 15811da177e4SLinus Torvalds 158286872cb5SThomas Graf ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); 158386872cb5SThomas Graf 158486872cb5SThomas Graf ip6_route_add(&cfg); 15851da177e4SLinus Torvalds } 15861da177e4SLinus Torvalds 15870be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) 15881da177e4SLinus Torvalds static void sit_route_add(struct net_device *dev) 15891da177e4SLinus Torvalds { 159086872cb5SThomas Graf struct fib6_config cfg = { 159186872cb5SThomas Graf .fc_table = RT6_TABLE_MAIN, 159286872cb5SThomas Graf .fc_metric = IP6_RT_PRIO_ADDRCONF, 159386872cb5SThomas Graf .fc_ifindex = dev->ifindex, 159486872cb5SThomas Graf .fc_dst_len = 96, 159586872cb5SThomas Graf .fc_flags = RTF_UP | RTF_NONEXTHOP, 159686872cb5SThomas Graf }; 15971da177e4SLinus Torvalds 15981da177e4SLinus Torvalds /* prefix length - 96 bits "::d.d.d.d" */ 159986872cb5SThomas Graf ip6_route_add(&cfg); 16001da177e4SLinus Torvalds } 16010be669bbSJoerg Roedel #endif 16021da177e4SLinus Torvalds 16031da177e4SLinus Torvalds static void addrconf_add_lroute(struct net_device *dev) 16041da177e4SLinus Torvalds { 16051da177e4SLinus Torvalds struct in6_addr addr; 16061da177e4SLinus Torvalds 16071da177e4SLinus Torvalds ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); 16081da177e4SLinus Torvalds addrconf_prefix_route(&addr, 64, dev, 0, 0); 16091da177e4SLinus Torvalds } 16101da177e4SLinus Torvalds 16111da177e4SLinus Torvalds static struct inet6_dev *addrconf_add_dev(struct net_device *dev) 16121da177e4SLinus Torvalds { 16131da177e4SLinus Torvalds struct inet6_dev *idev; 16141da177e4SLinus Torvalds 16151da177e4SLinus Torvalds ASSERT_RTNL(); 16161da177e4SLinus Torvalds 16171da177e4SLinus Torvalds if ((idev = ipv6_find_idev(dev)) == NULL) 16181da177e4SLinus Torvalds return NULL; 16191da177e4SLinus Torvalds 16201da177e4SLinus Torvalds /* Add default multicast route */ 16211da177e4SLinus Torvalds addrconf_add_mroute(dev); 16221da177e4SLinus Torvalds 16231da177e4SLinus Torvalds /* Add link local route */ 16241da177e4SLinus Torvalds addrconf_add_lroute(dev); 16251da177e4SLinus Torvalds return idev; 16261da177e4SLinus Torvalds } 16271da177e4SLinus Torvalds 16281da177e4SLinus Torvalds void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) 16291da177e4SLinus Torvalds { 16301da177e4SLinus Torvalds struct prefix_info *pinfo; 16311da177e4SLinus Torvalds __u32 valid_lft; 16321da177e4SLinus Torvalds __u32 prefered_lft; 16331da177e4SLinus Torvalds int addr_type; 16341da177e4SLinus Torvalds unsigned long rt_expires; 16351da177e4SLinus Torvalds struct inet6_dev *in6_dev; 16361da177e4SLinus Torvalds 16371da177e4SLinus Torvalds pinfo = (struct prefix_info *) opt; 16381da177e4SLinus Torvalds 16391da177e4SLinus Torvalds if (len < sizeof(struct prefix_info)) { 16401da177e4SLinus Torvalds ADBG(("addrconf: prefix option too short\n")); 16411da177e4SLinus Torvalds return; 16421da177e4SLinus Torvalds } 16431da177e4SLinus Torvalds 16441da177e4SLinus Torvalds /* 16451da177e4SLinus Torvalds * Validation checks ([ADDRCONF], page 19) 16461da177e4SLinus Torvalds */ 16471da177e4SLinus Torvalds 16481da177e4SLinus Torvalds addr_type = ipv6_addr_type(&pinfo->prefix); 16491da177e4SLinus Torvalds 16501da177e4SLinus Torvalds if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) 16511da177e4SLinus Torvalds return; 16521da177e4SLinus Torvalds 16531da177e4SLinus Torvalds valid_lft = ntohl(pinfo->valid); 16541da177e4SLinus Torvalds prefered_lft = ntohl(pinfo->prefered); 16551da177e4SLinus Torvalds 16561da177e4SLinus Torvalds if (prefered_lft > valid_lft) { 16571da177e4SLinus Torvalds if (net_ratelimit()) 16581da177e4SLinus Torvalds printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); 16591da177e4SLinus Torvalds return; 16601da177e4SLinus Torvalds } 16611da177e4SLinus Torvalds 16621da177e4SLinus Torvalds in6_dev = in6_dev_get(dev); 16631da177e4SLinus Torvalds 16641da177e4SLinus Torvalds if (in6_dev == NULL) { 16651da177e4SLinus Torvalds if (net_ratelimit()) 16661da177e4SLinus Torvalds printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); 16671da177e4SLinus Torvalds return; 16681da177e4SLinus Torvalds } 16691da177e4SLinus Torvalds 16701da177e4SLinus Torvalds /* 16711da177e4SLinus Torvalds * Two things going on here: 16721da177e4SLinus Torvalds * 1) Add routes for on-link prefixes 16731da177e4SLinus Torvalds * 2) Configure prefixes with the auto flag set 16741da177e4SLinus Torvalds */ 16751da177e4SLinus Torvalds 16761da177e4SLinus Torvalds /* Avoid arithmetic overflow. Really, we could 16771da177e4SLinus Torvalds save rt_expires in seconds, likely valid_lft, 16781da177e4SLinus Torvalds but it would require division in fib gc, that it 16791da177e4SLinus Torvalds not good. 16801da177e4SLinus Torvalds */ 16811da177e4SLinus Torvalds if (valid_lft >= 0x7FFFFFFF/HZ) 16823dd4bc68SYOSHIFUJI Hideaki rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ); 16831da177e4SLinus Torvalds else 16843dd4bc68SYOSHIFUJI Hideaki rt_expires = valid_lft * HZ; 16853dd4bc68SYOSHIFUJI Hideaki 16863dd4bc68SYOSHIFUJI Hideaki /* 16873dd4bc68SYOSHIFUJI Hideaki * We convert this (in jiffies) to clock_t later. 16883dd4bc68SYOSHIFUJI Hideaki * Avoid arithmetic overflow there as well. 16893dd4bc68SYOSHIFUJI Hideaki * Overflow can happen only if HZ < USER_HZ. 16903dd4bc68SYOSHIFUJI Hideaki */ 16913dd4bc68SYOSHIFUJI Hideaki if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ) 16923dd4bc68SYOSHIFUJI Hideaki rt_expires = 0x7FFFFFFF / USER_HZ; 16931da177e4SLinus Torvalds 16941da177e4SLinus Torvalds if (pinfo->onlink) { 16951da177e4SLinus Torvalds struct rt6_info *rt; 16961da177e4SLinus Torvalds rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1); 16971da177e4SLinus Torvalds 16981da177e4SLinus Torvalds if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { 16991da177e4SLinus Torvalds if (rt->rt6i_flags&RTF_EXPIRES) { 17001da177e4SLinus Torvalds if (valid_lft == 0) { 1701e0a1ad73SThomas Graf ip6_del_rt(rt); 17021da177e4SLinus Torvalds rt = NULL; 17031da177e4SLinus Torvalds } else { 17043dd4bc68SYOSHIFUJI Hideaki rt->rt6i_expires = jiffies + rt_expires; 17051da177e4SLinus Torvalds } 17061da177e4SLinus Torvalds } 17071da177e4SLinus Torvalds } else if (valid_lft) { 17081da177e4SLinus Torvalds addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, 17093dd4bc68SYOSHIFUJI Hideaki dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT); 17101da177e4SLinus Torvalds } 17111da177e4SLinus Torvalds if (rt) 17121da177e4SLinus Torvalds dst_release(&rt->u.dst); 17131da177e4SLinus Torvalds } 17141da177e4SLinus Torvalds 17151da177e4SLinus Torvalds /* Try to figure out our local address for this prefix */ 17161da177e4SLinus Torvalds 17171da177e4SLinus Torvalds if (pinfo->autoconf && in6_dev->cnf.autoconf) { 17181da177e4SLinus Torvalds struct inet6_ifaddr * ifp; 17191da177e4SLinus Torvalds struct in6_addr addr; 17201da177e4SLinus Torvalds int create = 0, update_lft = 0; 17211da177e4SLinus Torvalds 17221da177e4SLinus Torvalds if (pinfo->prefix_len == 64) { 17231da177e4SLinus Torvalds memcpy(&addr, &pinfo->prefix, 8); 17241da177e4SLinus Torvalds if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && 17251da177e4SLinus Torvalds ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { 17261da177e4SLinus Torvalds in6_dev_put(in6_dev); 17271da177e4SLinus Torvalds return; 17281da177e4SLinus Torvalds } 17291da177e4SLinus Torvalds goto ok; 17301da177e4SLinus Torvalds } 17311da177e4SLinus Torvalds if (net_ratelimit()) 17321da177e4SLinus Torvalds printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", 17331da177e4SLinus Torvalds pinfo->prefix_len); 17341da177e4SLinus Torvalds in6_dev_put(in6_dev); 17351da177e4SLinus Torvalds return; 17361da177e4SLinus Torvalds 17371da177e4SLinus Torvalds ok: 17381da177e4SLinus Torvalds 17391da177e4SLinus Torvalds ifp = ipv6_get_ifaddr(&addr, dev, 1); 17401da177e4SLinus Torvalds 17411da177e4SLinus Torvalds if (ifp == NULL && valid_lft) { 17421da177e4SLinus Torvalds int max_addresses = in6_dev->cnf.max_addresses; 174395c385b4SNeil Horman u32 addr_flags = 0; 174495c385b4SNeil Horman 174595c385b4SNeil Horman #ifdef CONFIG_IPV6_OPTIMISTIC_DAD 174695c385b4SNeil Horman if (in6_dev->cnf.optimistic_dad && 174795c385b4SNeil Horman !ipv6_devconf.forwarding) 174895c385b4SNeil Horman addr_flags = IFA_F_OPTIMISTIC; 174995c385b4SNeil Horman #endif 17501da177e4SLinus Torvalds 17511da177e4SLinus Torvalds /* Do not allow to create too much of autoconfigured 17521da177e4SLinus Torvalds * addresses; this would be too easy way to crash kernel. 17531da177e4SLinus Torvalds */ 17541da177e4SLinus Torvalds if (!max_addresses || 17551da177e4SLinus Torvalds ipv6_count_addresses(in6_dev) < max_addresses) 17561da177e4SLinus Torvalds ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, 175795c385b4SNeil Horman addr_type&IPV6_ADDR_SCOPE_MASK, 175895c385b4SNeil Horman addr_flags); 17591da177e4SLinus Torvalds 17601da177e4SLinus Torvalds if (!ifp || IS_ERR(ifp)) { 17611da177e4SLinus Torvalds in6_dev_put(in6_dev); 17621da177e4SLinus Torvalds return; 17631da177e4SLinus Torvalds } 17641da177e4SLinus Torvalds 17651da177e4SLinus Torvalds update_lft = create = 1; 17661da177e4SLinus Torvalds ifp->cstamp = jiffies; 17671da177e4SLinus Torvalds addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); 17681da177e4SLinus Torvalds } 17691da177e4SLinus Torvalds 17701da177e4SLinus Torvalds if (ifp) { 17711da177e4SLinus Torvalds int flags; 17721da177e4SLinus Torvalds unsigned long now; 17731da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 17741da177e4SLinus Torvalds struct inet6_ifaddr *ift; 17751da177e4SLinus Torvalds #endif 17761da177e4SLinus Torvalds u32 stored_lft; 17771da177e4SLinus Torvalds 17781da177e4SLinus Torvalds /* update lifetime (RFC2462 5.5.3 e) */ 17791da177e4SLinus Torvalds spin_lock(&ifp->lock); 17801da177e4SLinus Torvalds now = jiffies; 17811da177e4SLinus Torvalds if (ifp->valid_lft > (now - ifp->tstamp) / HZ) 17821da177e4SLinus Torvalds stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; 17831da177e4SLinus Torvalds else 17841da177e4SLinus Torvalds stored_lft = 0; 17851da177e4SLinus Torvalds if (!update_lft && stored_lft) { 17861da177e4SLinus Torvalds if (valid_lft > MIN_VALID_LIFETIME || 17871da177e4SLinus Torvalds valid_lft > stored_lft) 17881da177e4SLinus Torvalds update_lft = 1; 17891da177e4SLinus Torvalds else if (stored_lft <= MIN_VALID_LIFETIME) { 17901da177e4SLinus Torvalds /* valid_lft <= stored_lft is always true */ 17911da177e4SLinus Torvalds /* XXX: IPsec */ 17921da177e4SLinus Torvalds update_lft = 0; 17931da177e4SLinus Torvalds } else { 17941da177e4SLinus Torvalds valid_lft = MIN_VALID_LIFETIME; 17951da177e4SLinus Torvalds if (valid_lft < prefered_lft) 17961da177e4SLinus Torvalds prefered_lft = valid_lft; 17971da177e4SLinus Torvalds update_lft = 1; 17981da177e4SLinus Torvalds } 17991da177e4SLinus Torvalds } 18001da177e4SLinus Torvalds 18011da177e4SLinus Torvalds if (update_lft) { 18021da177e4SLinus Torvalds ifp->valid_lft = valid_lft; 18031da177e4SLinus Torvalds ifp->prefered_lft = prefered_lft; 18041da177e4SLinus Torvalds ifp->tstamp = now; 18051da177e4SLinus Torvalds flags = ifp->flags; 18061da177e4SLinus Torvalds ifp->flags &= ~IFA_F_DEPRECATED; 18071da177e4SLinus Torvalds spin_unlock(&ifp->lock); 18081da177e4SLinus Torvalds 18091da177e4SLinus Torvalds if (!(flags&IFA_F_TENTATIVE)) 18101da177e4SLinus Torvalds ipv6_ifa_notify(0, ifp); 18111da177e4SLinus Torvalds } else 18121da177e4SLinus Torvalds spin_unlock(&ifp->lock); 18131da177e4SLinus Torvalds 18141da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 18151da177e4SLinus Torvalds read_lock_bh(&in6_dev->lock); 18161da177e4SLinus Torvalds /* update all temporary addresses in the list */ 18171da177e4SLinus Torvalds for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) { 18181da177e4SLinus Torvalds /* 18191da177e4SLinus Torvalds * When adjusting the lifetimes of an existing 18201da177e4SLinus Torvalds * temporary address, only lower the lifetimes. 18211da177e4SLinus Torvalds * Implementations must not increase the 18221da177e4SLinus Torvalds * lifetimes of an existing temporary address 18231da177e4SLinus Torvalds * when processing a Prefix Information Option. 18241da177e4SLinus Torvalds */ 18251da177e4SLinus Torvalds spin_lock(&ift->lock); 18261da177e4SLinus Torvalds flags = ift->flags; 18271da177e4SLinus Torvalds if (ift->valid_lft > valid_lft && 18281da177e4SLinus Torvalds ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) 18291da177e4SLinus Torvalds ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; 18301da177e4SLinus Torvalds if (ift->prefered_lft > prefered_lft && 18311da177e4SLinus Torvalds ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) 18321da177e4SLinus Torvalds ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; 18331da177e4SLinus Torvalds spin_unlock(&ift->lock); 18341da177e4SLinus Torvalds if (!(flags&IFA_F_TENTATIVE)) 18351da177e4SLinus Torvalds ipv6_ifa_notify(0, ift); 18361da177e4SLinus Torvalds } 18371da177e4SLinus Torvalds 18381da177e4SLinus Torvalds if (create && in6_dev->cnf.use_tempaddr > 0) { 18391da177e4SLinus Torvalds /* 18401da177e4SLinus Torvalds * When a new public address is created as described in [ADDRCONF], 18411da177e4SLinus Torvalds * also create a new temporary address. 18421da177e4SLinus Torvalds */ 18431da177e4SLinus Torvalds read_unlock_bh(&in6_dev->lock); 18441da177e4SLinus Torvalds ipv6_create_tempaddr(ifp, NULL); 18451da177e4SLinus Torvalds } else { 18461da177e4SLinus Torvalds read_unlock_bh(&in6_dev->lock); 18471da177e4SLinus Torvalds } 18481da177e4SLinus Torvalds #endif 18491da177e4SLinus Torvalds in6_ifa_put(ifp); 18501da177e4SLinus Torvalds addrconf_verify(0); 18511da177e4SLinus Torvalds } 18521da177e4SLinus Torvalds } 18531da177e4SLinus Torvalds inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); 18541da177e4SLinus Torvalds in6_dev_put(in6_dev); 18551da177e4SLinus Torvalds } 18561da177e4SLinus Torvalds 18571da177e4SLinus Torvalds /* 18581da177e4SLinus Torvalds * Set destination address. 18591da177e4SLinus Torvalds * Special case for SIT interfaces where we create a new "virtual" 18601da177e4SLinus Torvalds * device. 18611da177e4SLinus Torvalds */ 18621da177e4SLinus Torvalds int addrconf_set_dstaddr(void __user *arg) 18631da177e4SLinus Torvalds { 18641da177e4SLinus Torvalds struct in6_ifreq ireq; 18651da177e4SLinus Torvalds struct net_device *dev; 18661da177e4SLinus Torvalds int err = -EINVAL; 18671da177e4SLinus Torvalds 18681da177e4SLinus Torvalds rtnl_lock(); 18691da177e4SLinus Torvalds 18701da177e4SLinus Torvalds err = -EFAULT; 18711da177e4SLinus Torvalds if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) 18721da177e4SLinus Torvalds goto err_exit; 18731da177e4SLinus Torvalds 1874881d966bSEric W. Biederman dev = __dev_get_by_index(&init_net, ireq.ifr6_ifindex); 18751da177e4SLinus Torvalds 18761da177e4SLinus Torvalds err = -ENODEV; 18771da177e4SLinus Torvalds if (dev == NULL) 18781da177e4SLinus Torvalds goto err_exit; 18791da177e4SLinus Torvalds 18800be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) 18811da177e4SLinus Torvalds if (dev->type == ARPHRD_SIT) { 18821da177e4SLinus Torvalds struct ifreq ifr; 18831da177e4SLinus Torvalds mm_segment_t oldfs; 18841da177e4SLinus Torvalds struct ip_tunnel_parm p; 18851da177e4SLinus Torvalds 18861da177e4SLinus Torvalds err = -EADDRNOTAVAIL; 18871da177e4SLinus Torvalds if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) 18881da177e4SLinus Torvalds goto err_exit; 18891da177e4SLinus Torvalds 18901da177e4SLinus Torvalds memset(&p, 0, sizeof(p)); 18911da177e4SLinus Torvalds p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; 18921da177e4SLinus Torvalds p.iph.saddr = 0; 18931da177e4SLinus Torvalds p.iph.version = 4; 18941da177e4SLinus Torvalds p.iph.ihl = 5; 18951da177e4SLinus Torvalds p.iph.protocol = IPPROTO_IPV6; 18961da177e4SLinus Torvalds p.iph.ttl = 64; 18971da177e4SLinus Torvalds ifr.ifr_ifru.ifru_data = (void __user *)&p; 18981da177e4SLinus Torvalds 18991da177e4SLinus Torvalds oldfs = get_fs(); set_fs(KERNEL_DS); 19001da177e4SLinus Torvalds err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL); 19011da177e4SLinus Torvalds set_fs(oldfs); 19021da177e4SLinus Torvalds 19031da177e4SLinus Torvalds if (err == 0) { 19041da177e4SLinus Torvalds err = -ENOBUFS; 1905881d966bSEric W. Biederman if ((dev = __dev_get_by_name(&init_net, p.name)) == NULL) 19061da177e4SLinus Torvalds goto err_exit; 19071da177e4SLinus Torvalds err = dev_open(dev); 19081da177e4SLinus Torvalds } 19091da177e4SLinus Torvalds } 19100be669bbSJoerg Roedel #endif 19111da177e4SLinus Torvalds 19121da177e4SLinus Torvalds err_exit: 19131da177e4SLinus Torvalds rtnl_unlock(); 19141da177e4SLinus Torvalds return err; 19151da177e4SLinus Torvalds } 19161da177e4SLinus Torvalds 19171da177e4SLinus Torvalds /* 19181da177e4SLinus Torvalds * Manual configuration of address on an interface 19191da177e4SLinus Torvalds */ 19200778769dSNoriaki TAKAMIYA static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen, 192155ebaef1SNoriaki TAKAMIYA __u8 ifa_flags, __u32 prefered_lft, __u32 valid_lft) 19221da177e4SLinus Torvalds { 19231da177e4SLinus Torvalds struct inet6_ifaddr *ifp; 19241da177e4SLinus Torvalds struct inet6_dev *idev; 19251da177e4SLinus Torvalds struct net_device *dev; 19261da177e4SLinus Torvalds int scope; 192746d48046SYOSHIFUJI Hideaki u32 flags = RTF_EXPIRES; 19281da177e4SLinus Torvalds 19291da177e4SLinus Torvalds ASSERT_RTNL(); 19301da177e4SLinus Torvalds 19310778769dSNoriaki TAKAMIYA /* check the lifetime */ 19320778769dSNoriaki TAKAMIYA if (!valid_lft || prefered_lft > valid_lft) 19330778769dSNoriaki TAKAMIYA return -EINVAL; 19340778769dSNoriaki TAKAMIYA 1935881d966bSEric W. Biederman if ((dev = __dev_get_by_index(&init_net, ifindex)) == NULL) 19361da177e4SLinus Torvalds return -ENODEV; 19371da177e4SLinus Torvalds 19381da177e4SLinus Torvalds if ((idev = addrconf_add_dev(dev)) == NULL) 19391da177e4SLinus Torvalds return -ENOBUFS; 19401da177e4SLinus Torvalds 19411da177e4SLinus Torvalds scope = ipv6_addr_scope(pfx); 19421da177e4SLinus Torvalds 194346d48046SYOSHIFUJI Hideaki if (valid_lft == INFINITY_LIFE_TIME) { 19440778769dSNoriaki TAKAMIYA ifa_flags |= IFA_F_PERMANENT; 194546d48046SYOSHIFUJI Hideaki flags = 0; 194646d48046SYOSHIFUJI Hideaki } else if (valid_lft >= 0x7FFFFFFF/HZ) 19470778769dSNoriaki TAKAMIYA valid_lft = 0x7FFFFFFF/HZ; 19480778769dSNoriaki TAKAMIYA 19490778769dSNoriaki TAKAMIYA if (prefered_lft == 0) 19500778769dSNoriaki TAKAMIYA ifa_flags |= IFA_F_DEPRECATED; 19510778769dSNoriaki TAKAMIYA else if ((prefered_lft >= 0x7FFFFFFF/HZ) && 19520778769dSNoriaki TAKAMIYA (prefered_lft != INFINITY_LIFE_TIME)) 19530778769dSNoriaki TAKAMIYA prefered_lft = 0x7FFFFFFF/HZ; 19540778769dSNoriaki TAKAMIYA 19550778769dSNoriaki TAKAMIYA ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); 19560778769dSNoriaki TAKAMIYA 19571da177e4SLinus Torvalds if (!IS_ERR(ifp)) { 195806aebfb7SHerbert Xu spin_lock_bh(&ifp->lock); 19590778769dSNoriaki TAKAMIYA ifp->valid_lft = valid_lft; 19600778769dSNoriaki TAKAMIYA ifp->prefered_lft = prefered_lft; 19610778769dSNoriaki TAKAMIYA ifp->tstamp = jiffies; 196206aebfb7SHerbert Xu spin_unlock_bh(&ifp->lock); 19630778769dSNoriaki TAKAMIYA 196446d48046SYOSHIFUJI Hideaki addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, 196546d48046SYOSHIFUJI Hideaki jiffies_to_clock_t(valid_lft * HZ), flags); 196695c385b4SNeil Horman /* 196795c385b4SNeil Horman * Note that section 3.1 of RFC 4429 indicates 196895c385b4SNeil Horman * that the Optimistic flag should not be set for 196995c385b4SNeil Horman * manually configured addresses 197095c385b4SNeil Horman */ 19711da177e4SLinus Torvalds addrconf_dad_start(ifp, 0); 19721da177e4SLinus Torvalds in6_ifa_put(ifp); 19730778769dSNoriaki TAKAMIYA addrconf_verify(0); 19741da177e4SLinus Torvalds return 0; 19751da177e4SLinus Torvalds } 19761da177e4SLinus Torvalds 19771da177e4SLinus Torvalds return PTR_ERR(ifp); 19781da177e4SLinus Torvalds } 19791da177e4SLinus Torvalds 19801da177e4SLinus Torvalds static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen) 19811da177e4SLinus Torvalds { 19821da177e4SLinus Torvalds struct inet6_ifaddr *ifp; 19831da177e4SLinus Torvalds struct inet6_dev *idev; 19841da177e4SLinus Torvalds struct net_device *dev; 19851da177e4SLinus Torvalds 1986881d966bSEric W. Biederman if ((dev = __dev_get_by_index(&init_net, ifindex)) == NULL) 19871da177e4SLinus Torvalds return -ENODEV; 19881da177e4SLinus Torvalds 19891da177e4SLinus Torvalds if ((idev = __in6_dev_get(dev)) == NULL) 19901da177e4SLinus Torvalds return -ENXIO; 19911da177e4SLinus Torvalds 19921da177e4SLinus Torvalds read_lock_bh(&idev->lock); 19931da177e4SLinus Torvalds for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) { 19941da177e4SLinus Torvalds if (ifp->prefix_len == plen && 19951da177e4SLinus Torvalds ipv6_addr_equal(pfx, &ifp->addr)) { 19961da177e4SLinus Torvalds in6_ifa_hold(ifp); 19971da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 19981da177e4SLinus Torvalds 19991da177e4SLinus Torvalds ipv6_del_addr(ifp); 20001da177e4SLinus Torvalds 20011da177e4SLinus Torvalds /* If the last address is deleted administratively, 20021da177e4SLinus Torvalds disable IPv6 on this interface. 20031da177e4SLinus Torvalds */ 20041da177e4SLinus Torvalds if (idev->addr_list == NULL) 20051da177e4SLinus Torvalds addrconf_ifdown(idev->dev, 1); 20061da177e4SLinus Torvalds return 0; 20071da177e4SLinus Torvalds } 20081da177e4SLinus Torvalds } 20091da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 20101da177e4SLinus Torvalds return -EADDRNOTAVAIL; 20111da177e4SLinus Torvalds } 20121da177e4SLinus Torvalds 20131da177e4SLinus Torvalds 20141da177e4SLinus Torvalds int addrconf_add_ifaddr(void __user *arg) 20151da177e4SLinus Torvalds { 20161da177e4SLinus Torvalds struct in6_ifreq ireq; 20171da177e4SLinus Torvalds int err; 20181da177e4SLinus Torvalds 20191da177e4SLinus Torvalds if (!capable(CAP_NET_ADMIN)) 20201da177e4SLinus Torvalds return -EPERM; 20211da177e4SLinus Torvalds 20221da177e4SLinus Torvalds if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) 20231da177e4SLinus Torvalds return -EFAULT; 20241da177e4SLinus Torvalds 20251da177e4SLinus Torvalds rtnl_lock(); 20260778769dSNoriaki TAKAMIYA err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen, 202755ebaef1SNoriaki TAKAMIYA IFA_F_PERMANENT, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); 20281da177e4SLinus Torvalds rtnl_unlock(); 20291da177e4SLinus Torvalds return err; 20301da177e4SLinus Torvalds } 20311da177e4SLinus Torvalds 20321da177e4SLinus Torvalds int addrconf_del_ifaddr(void __user *arg) 20331da177e4SLinus Torvalds { 20341da177e4SLinus Torvalds struct in6_ifreq ireq; 20351da177e4SLinus Torvalds int err; 20361da177e4SLinus Torvalds 20371da177e4SLinus Torvalds if (!capable(CAP_NET_ADMIN)) 20381da177e4SLinus Torvalds return -EPERM; 20391da177e4SLinus Torvalds 20401da177e4SLinus Torvalds if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) 20411da177e4SLinus Torvalds return -EFAULT; 20421da177e4SLinus Torvalds 20431da177e4SLinus Torvalds rtnl_lock(); 20441da177e4SLinus Torvalds err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen); 20451da177e4SLinus Torvalds rtnl_unlock(); 20461da177e4SLinus Torvalds return err; 20471da177e4SLinus Torvalds } 20481da177e4SLinus Torvalds 20490be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) 20501da177e4SLinus Torvalds static void sit_add_v4_addrs(struct inet6_dev *idev) 20511da177e4SLinus Torvalds { 20521da177e4SLinus Torvalds struct inet6_ifaddr * ifp; 20531da177e4SLinus Torvalds struct in6_addr addr; 20541da177e4SLinus Torvalds struct net_device *dev; 20551da177e4SLinus Torvalds int scope; 20561da177e4SLinus Torvalds 20571da177e4SLinus Torvalds ASSERT_RTNL(); 20581da177e4SLinus Torvalds 20591da177e4SLinus Torvalds memset(&addr, 0, sizeof(struct in6_addr)); 20601da177e4SLinus Torvalds memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); 20611da177e4SLinus Torvalds 20621da177e4SLinus Torvalds if (idev->dev->flags&IFF_POINTOPOINT) { 20631da177e4SLinus Torvalds addr.s6_addr32[0] = htonl(0xfe800000); 20641da177e4SLinus Torvalds scope = IFA_LINK; 20651da177e4SLinus Torvalds } else { 20661da177e4SLinus Torvalds scope = IPV6_ADDR_COMPATv4; 20671da177e4SLinus Torvalds } 20681da177e4SLinus Torvalds 20691da177e4SLinus Torvalds if (addr.s6_addr32[3]) { 20701da177e4SLinus Torvalds ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT); 20711da177e4SLinus Torvalds if (!IS_ERR(ifp)) { 20721da177e4SLinus Torvalds spin_lock_bh(&ifp->lock); 20731da177e4SLinus Torvalds ifp->flags &= ~IFA_F_TENTATIVE; 20741da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 20751da177e4SLinus Torvalds ipv6_ifa_notify(RTM_NEWADDR, ifp); 20761da177e4SLinus Torvalds in6_ifa_put(ifp); 20771da177e4SLinus Torvalds } 20781da177e4SLinus Torvalds return; 20791da177e4SLinus Torvalds } 20801da177e4SLinus Torvalds 2081881d966bSEric W. Biederman for_each_netdev(&init_net, dev) { 2082e5ed6399SHerbert Xu struct in_device * in_dev = __in_dev_get_rtnl(dev); 20831da177e4SLinus Torvalds if (in_dev && (dev->flags & IFF_UP)) { 20841da177e4SLinus Torvalds struct in_ifaddr * ifa; 20851da177e4SLinus Torvalds 20861da177e4SLinus Torvalds int flag = scope; 20871da177e4SLinus Torvalds 20881da177e4SLinus Torvalds for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { 20891da177e4SLinus Torvalds int plen; 20901da177e4SLinus Torvalds 20911da177e4SLinus Torvalds addr.s6_addr32[3] = ifa->ifa_local; 20921da177e4SLinus Torvalds 20931da177e4SLinus Torvalds if (ifa->ifa_scope == RT_SCOPE_LINK) 20941da177e4SLinus Torvalds continue; 20951da177e4SLinus Torvalds if (ifa->ifa_scope >= RT_SCOPE_HOST) { 20961da177e4SLinus Torvalds if (idev->dev->flags&IFF_POINTOPOINT) 20971da177e4SLinus Torvalds continue; 20981da177e4SLinus Torvalds flag |= IFA_HOST; 20991da177e4SLinus Torvalds } 21001da177e4SLinus Torvalds if (idev->dev->flags&IFF_POINTOPOINT) 21011da177e4SLinus Torvalds plen = 64; 21021da177e4SLinus Torvalds else 21031da177e4SLinus Torvalds plen = 96; 21041da177e4SLinus Torvalds 21051da177e4SLinus Torvalds ifp = ipv6_add_addr(idev, &addr, plen, flag, 21061da177e4SLinus Torvalds IFA_F_PERMANENT); 21071da177e4SLinus Torvalds if (!IS_ERR(ifp)) { 21081da177e4SLinus Torvalds spin_lock_bh(&ifp->lock); 21091da177e4SLinus Torvalds ifp->flags &= ~IFA_F_TENTATIVE; 21101da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 21111da177e4SLinus Torvalds ipv6_ifa_notify(RTM_NEWADDR, ifp); 21121da177e4SLinus Torvalds in6_ifa_put(ifp); 21131da177e4SLinus Torvalds } 21141da177e4SLinus Torvalds } 21151da177e4SLinus Torvalds } 21161da177e4SLinus Torvalds } 21171da177e4SLinus Torvalds } 21180be669bbSJoerg Roedel #endif 21191da177e4SLinus Torvalds 21201da177e4SLinus Torvalds static void init_loopback(struct net_device *dev) 21211da177e4SLinus Torvalds { 21221da177e4SLinus Torvalds struct inet6_dev *idev; 21231da177e4SLinus Torvalds struct inet6_ifaddr * ifp; 21241da177e4SLinus Torvalds 21251da177e4SLinus Torvalds /* ::1 */ 21261da177e4SLinus Torvalds 21271da177e4SLinus Torvalds ASSERT_RTNL(); 21281da177e4SLinus Torvalds 21291da177e4SLinus Torvalds if ((idev = ipv6_find_idev(dev)) == NULL) { 21301da177e4SLinus Torvalds printk(KERN_DEBUG "init loopback: add_dev failed\n"); 21311da177e4SLinus Torvalds return; 21321da177e4SLinus Torvalds } 21331da177e4SLinus Torvalds 21341da177e4SLinus Torvalds ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT); 21351da177e4SLinus Torvalds if (!IS_ERR(ifp)) { 21361da177e4SLinus Torvalds spin_lock_bh(&ifp->lock); 21371da177e4SLinus Torvalds ifp->flags &= ~IFA_F_TENTATIVE; 21381da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 21391da177e4SLinus Torvalds ipv6_ifa_notify(RTM_NEWADDR, ifp); 21401da177e4SLinus Torvalds in6_ifa_put(ifp); 21411da177e4SLinus Torvalds } 21421da177e4SLinus Torvalds } 21431da177e4SLinus Torvalds 21441da177e4SLinus Torvalds static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) 21451da177e4SLinus Torvalds { 21461da177e4SLinus Torvalds struct inet6_ifaddr * ifp; 214795c385b4SNeil Horman u32 addr_flags = IFA_F_PERMANENT; 21481da177e4SLinus Torvalds 214995c385b4SNeil Horman #ifdef CONFIG_IPV6_OPTIMISTIC_DAD 215095c385b4SNeil Horman if (idev->cnf.optimistic_dad && 215195c385b4SNeil Horman !ipv6_devconf.forwarding) 215295c385b4SNeil Horman addr_flags |= IFA_F_OPTIMISTIC; 215395c385b4SNeil Horman #endif 215495c385b4SNeil Horman 215595c385b4SNeil Horman 215695c385b4SNeil Horman ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags); 21571da177e4SLinus Torvalds if (!IS_ERR(ifp)) { 215846d48046SYOSHIFUJI Hideaki addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); 21591da177e4SLinus Torvalds addrconf_dad_start(ifp, 0); 21601da177e4SLinus Torvalds in6_ifa_put(ifp); 21611da177e4SLinus Torvalds } 21621da177e4SLinus Torvalds } 21631da177e4SLinus Torvalds 21641da177e4SLinus Torvalds static void addrconf_dev_config(struct net_device *dev) 21651da177e4SLinus Torvalds { 21661da177e4SLinus Torvalds struct in6_addr addr; 21671da177e4SLinus Torvalds struct inet6_dev * idev; 21681da177e4SLinus Torvalds 21691da177e4SLinus Torvalds ASSERT_RTNL(); 21701da177e4SLinus Torvalds 217174235a25SHerbert Xu if ((dev->type != ARPHRD_ETHER) && 217274235a25SHerbert Xu (dev->type != ARPHRD_FDDI) && 217374235a25SHerbert Xu (dev->type != ARPHRD_IEEE802_TR) && 217474235a25SHerbert Xu (dev->type != ARPHRD_ARCNET) && 217574235a25SHerbert Xu (dev->type != ARPHRD_INFINIBAND)) { 217674235a25SHerbert Xu /* Alas, we support only Ethernet autoconfiguration. */ 217774235a25SHerbert Xu return; 217874235a25SHerbert Xu } 217974235a25SHerbert Xu 21801da177e4SLinus Torvalds idev = addrconf_add_dev(dev); 21811da177e4SLinus Torvalds if (idev == NULL) 21821da177e4SLinus Torvalds return; 21831da177e4SLinus Torvalds 21841da177e4SLinus Torvalds memset(&addr, 0, sizeof(struct in6_addr)); 21851da177e4SLinus Torvalds addr.s6_addr32[0] = htonl(0xFE800000); 21861da177e4SLinus Torvalds 21871da177e4SLinus Torvalds if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) 21881da177e4SLinus Torvalds addrconf_add_linklocal(idev, &addr); 21891da177e4SLinus Torvalds } 21901da177e4SLinus Torvalds 21910be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) 21921da177e4SLinus Torvalds static void addrconf_sit_config(struct net_device *dev) 21931da177e4SLinus Torvalds { 21941da177e4SLinus Torvalds struct inet6_dev *idev; 21951da177e4SLinus Torvalds 21961da177e4SLinus Torvalds ASSERT_RTNL(); 21971da177e4SLinus Torvalds 21981da177e4SLinus Torvalds /* 21991da177e4SLinus Torvalds * Configure the tunnel with one of our IPv4 22001da177e4SLinus Torvalds * addresses... we should configure all of 22011da177e4SLinus Torvalds * our v4 addrs in the tunnel 22021da177e4SLinus Torvalds */ 22031da177e4SLinus Torvalds 22041da177e4SLinus Torvalds if ((idev = ipv6_find_idev(dev)) == NULL) { 22051da177e4SLinus Torvalds printk(KERN_DEBUG "init sit: add_dev failed\n"); 22061da177e4SLinus Torvalds return; 22071da177e4SLinus Torvalds } 22081da177e4SLinus Torvalds 22091da177e4SLinus Torvalds sit_add_v4_addrs(idev); 22101da177e4SLinus Torvalds 22111da177e4SLinus Torvalds if (dev->flags&IFF_POINTOPOINT) { 22121da177e4SLinus Torvalds addrconf_add_mroute(dev); 22131da177e4SLinus Torvalds addrconf_add_lroute(dev); 22141da177e4SLinus Torvalds } else 22151da177e4SLinus Torvalds sit_route_add(dev); 22161da177e4SLinus Torvalds } 22170be669bbSJoerg Roedel #endif 22181da177e4SLinus Torvalds 22191da177e4SLinus Torvalds static inline int 22201da177e4SLinus Torvalds ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) 22211da177e4SLinus Torvalds { 22221da177e4SLinus Torvalds struct in6_addr lladdr; 22231da177e4SLinus Torvalds 222495c385b4SNeil Horman if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { 22251da177e4SLinus Torvalds addrconf_add_linklocal(idev, &lladdr); 22261da177e4SLinus Torvalds return 0; 22271da177e4SLinus Torvalds } 22281da177e4SLinus Torvalds return -1; 22291da177e4SLinus Torvalds } 22301da177e4SLinus Torvalds 22311da177e4SLinus Torvalds static void ip6_tnl_add_linklocal(struct inet6_dev *idev) 22321da177e4SLinus Torvalds { 22331da177e4SLinus Torvalds struct net_device *link_dev; 22341da177e4SLinus Torvalds 22351da177e4SLinus Torvalds /* first try to inherit the link-local address from the link device */ 22361da177e4SLinus Torvalds if (idev->dev->iflink && 2237881d966bSEric W. Biederman (link_dev = __dev_get_by_index(&init_net, idev->dev->iflink))) { 22381da177e4SLinus Torvalds if (!ipv6_inherit_linklocal(idev, link_dev)) 22391da177e4SLinus Torvalds return; 22401da177e4SLinus Torvalds } 22411da177e4SLinus Torvalds /* then try to inherit it from any device */ 2242881d966bSEric W. Biederman for_each_netdev(&init_net, link_dev) { 22431da177e4SLinus Torvalds if (!ipv6_inherit_linklocal(idev, link_dev)) 22441da177e4SLinus Torvalds return; 22451da177e4SLinus Torvalds } 22461da177e4SLinus Torvalds printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); 22471da177e4SLinus Torvalds } 22481da177e4SLinus Torvalds 22491da177e4SLinus Torvalds /* 22501da177e4SLinus Torvalds * Autoconfigure tunnel with a link-local address so routing protocols, 22511da177e4SLinus Torvalds * DHCPv6, MLD etc. can be run over the virtual link 22521da177e4SLinus Torvalds */ 22531da177e4SLinus Torvalds 22541da177e4SLinus Torvalds static void addrconf_ip6_tnl_config(struct net_device *dev) 22551da177e4SLinus Torvalds { 22561da177e4SLinus Torvalds struct inet6_dev *idev; 22571da177e4SLinus Torvalds 22581da177e4SLinus Torvalds ASSERT_RTNL(); 22591da177e4SLinus Torvalds 22601da177e4SLinus Torvalds if ((idev = addrconf_add_dev(dev)) == NULL) { 22611da177e4SLinus Torvalds printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); 22621da177e4SLinus Torvalds return; 22631da177e4SLinus Torvalds } 22641da177e4SLinus Torvalds ip6_tnl_add_linklocal(idev); 22651da177e4SLinus Torvalds } 22661da177e4SLinus Torvalds 22671da177e4SLinus Torvalds static int addrconf_notify(struct notifier_block *this, unsigned long event, 22681da177e4SLinus Torvalds void * data) 22691da177e4SLinus Torvalds { 22701da177e4SLinus Torvalds struct net_device *dev = (struct net_device *) data; 227174235a25SHerbert Xu struct inet6_dev *idev = __in6_dev_get(dev); 2272c5e33bddSYOSHIFUJI Hideaki int run_pending = 0; 2273b217d616SHerbert Xu int err; 22741da177e4SLinus Torvalds 2275e9dc8653SEric W. Biederman if (dev->nd_net != &init_net) 2276e9dc8653SEric W. Biederman return NOTIFY_DONE; 2277e9dc8653SEric W. Biederman 22781da177e4SLinus Torvalds switch(event) { 227945ba9dd2SYOSHIFUJI Hideaki case NETDEV_REGISTER: 228074235a25SHerbert Xu if (!idev && dev->mtu >= IPV6_MIN_MTU) { 228145ba9dd2SYOSHIFUJI Hideaki idev = ipv6_add_dev(dev); 228245ba9dd2SYOSHIFUJI Hideaki if (!idev) 2283b217d616SHerbert Xu return notifier_from_errno(-ENOMEM); 228445ba9dd2SYOSHIFUJI Hideaki } 228545ba9dd2SYOSHIFUJI Hideaki break; 22861da177e4SLinus Torvalds case NETDEV_UP: 22873c21edbdSYOSHIFUJI Hideaki case NETDEV_CHANGE: 2288c2edacf8SJay Vosburgh if (dev->flags & IFF_SLAVE) 2289c2edacf8SJay Vosburgh break; 2290c2edacf8SJay Vosburgh 22913c21edbdSYOSHIFUJI Hideaki if (event == NETDEV_UP) { 2292f24e3d65SMitsuru Chinen if (!addrconf_qdisc_ok(dev)) { 22933c21edbdSYOSHIFUJI Hideaki /* device is not ready yet. */ 22943c21edbdSYOSHIFUJI Hideaki printk(KERN_INFO 22953c21edbdSYOSHIFUJI Hideaki "ADDRCONF(NETDEV_UP): %s: " 22963c21edbdSYOSHIFUJI Hideaki "link is not ready\n", 22973c21edbdSYOSHIFUJI Hideaki dev->name); 22983c21edbdSYOSHIFUJI Hideaki break; 22993c21edbdSYOSHIFUJI Hideaki } 230099081049SKristian Slavov 230199081049SKristian Slavov if (idev) 230299081049SKristian Slavov idev->if_flags |= IF_READY; 23033c21edbdSYOSHIFUJI Hideaki } else { 2304f24e3d65SMitsuru Chinen if (!addrconf_qdisc_ok(dev)) { 23053c21edbdSYOSHIFUJI Hideaki /* device is still not ready. */ 23063c21edbdSYOSHIFUJI Hideaki break; 23073c21edbdSYOSHIFUJI Hideaki } 23083c21edbdSYOSHIFUJI Hideaki 23093c21edbdSYOSHIFUJI Hideaki if (idev) { 23103c21edbdSYOSHIFUJI Hideaki if (idev->if_flags & IF_READY) { 23113c21edbdSYOSHIFUJI Hideaki /* device is already configured. */ 23123c21edbdSYOSHIFUJI Hideaki break; 23133c21edbdSYOSHIFUJI Hideaki } 23143c21edbdSYOSHIFUJI Hideaki idev->if_flags |= IF_READY; 23153c21edbdSYOSHIFUJI Hideaki } 23163c21edbdSYOSHIFUJI Hideaki 23173c21edbdSYOSHIFUJI Hideaki printk(KERN_INFO 23183c21edbdSYOSHIFUJI Hideaki "ADDRCONF(NETDEV_CHANGE): %s: " 23193c21edbdSYOSHIFUJI Hideaki "link becomes ready\n", 23203c21edbdSYOSHIFUJI Hideaki dev->name); 23213c21edbdSYOSHIFUJI Hideaki 2322c5e33bddSYOSHIFUJI Hideaki run_pending = 1; 23233c21edbdSYOSHIFUJI Hideaki } 23243c21edbdSYOSHIFUJI Hideaki 23251da177e4SLinus Torvalds switch(dev->type) { 23260be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) 23271da177e4SLinus Torvalds case ARPHRD_SIT: 23281da177e4SLinus Torvalds addrconf_sit_config(dev); 23291da177e4SLinus Torvalds break; 23300be669bbSJoerg Roedel #endif 23311da177e4SLinus Torvalds case ARPHRD_TUNNEL6: 23321da177e4SLinus Torvalds addrconf_ip6_tnl_config(dev); 23331da177e4SLinus Torvalds break; 23341da177e4SLinus Torvalds case ARPHRD_LOOPBACK: 23351da177e4SLinus Torvalds init_loopback(dev); 23361da177e4SLinus Torvalds break; 23371da177e4SLinus Torvalds 23381da177e4SLinus Torvalds default: 23391da177e4SLinus Torvalds addrconf_dev_config(dev); 23401da177e4SLinus Torvalds break; 23413ff50b79SStephen Hemminger } 23421da177e4SLinus Torvalds if (idev) { 2343c5e33bddSYOSHIFUJI Hideaki if (run_pending) 2344c5e33bddSYOSHIFUJI Hideaki addrconf_dad_run(idev); 2345c5e33bddSYOSHIFUJI Hideaki 23461da177e4SLinus Torvalds /* If the MTU changed during the interface down, when the 23471da177e4SLinus Torvalds interface up, the changed MTU must be reflected in the 23481da177e4SLinus Torvalds idev as well as routers. 23491da177e4SLinus Torvalds */ 23501da177e4SLinus Torvalds if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) { 23511da177e4SLinus Torvalds rt6_mtu_change(dev, dev->mtu); 23521da177e4SLinus Torvalds idev->cnf.mtu6 = dev->mtu; 23531da177e4SLinus Torvalds } 23541da177e4SLinus Torvalds idev->tstamp = jiffies; 23551da177e4SLinus Torvalds inet6_ifinfo_notify(RTM_NEWLINK, idev); 23561da177e4SLinus Torvalds /* If the changed mtu during down is lower than IPV6_MIN_MTU 23571da177e4SLinus Torvalds stop IPv6 on this interface. 23581da177e4SLinus Torvalds */ 23591da177e4SLinus Torvalds if (dev->mtu < IPV6_MIN_MTU) 23601da177e4SLinus Torvalds addrconf_ifdown(dev, event != NETDEV_DOWN); 23611da177e4SLinus Torvalds } 23621da177e4SLinus Torvalds break; 23631da177e4SLinus Torvalds 23641da177e4SLinus Torvalds case NETDEV_CHANGEMTU: 23651da177e4SLinus Torvalds if ( idev && dev->mtu >= IPV6_MIN_MTU) { 23661da177e4SLinus Torvalds rt6_mtu_change(dev, dev->mtu); 23671da177e4SLinus Torvalds idev->cnf.mtu6 = dev->mtu; 23681da177e4SLinus Torvalds break; 23691da177e4SLinus Torvalds } 23701da177e4SLinus Torvalds 23711da177e4SLinus Torvalds /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */ 23721da177e4SLinus Torvalds 23731da177e4SLinus Torvalds case NETDEV_DOWN: 23741da177e4SLinus Torvalds case NETDEV_UNREGISTER: 23751da177e4SLinus Torvalds /* 23761da177e4SLinus Torvalds * Remove all addresses from this interface. 23771da177e4SLinus Torvalds */ 23781da177e4SLinus Torvalds addrconf_ifdown(dev, event != NETDEV_DOWN); 23791da177e4SLinus Torvalds break; 23803c21edbdSYOSHIFUJI Hideaki 23811da177e4SLinus Torvalds case NETDEV_CHANGENAME: 23821da177e4SLinus Torvalds if (idev) { 23835632c515SStephen Hemminger snmp6_unregister_dev(idev); 23845632c515SStephen Hemminger #ifdef CONFIG_SYSCTL 23851da177e4SLinus Torvalds addrconf_sysctl_unregister(&idev->cnf); 23861da177e4SLinus Torvalds neigh_sysctl_unregister(idev->nd_parms); 23871da177e4SLinus Torvalds neigh_sysctl_register(dev, idev->nd_parms, 23881da177e4SLinus Torvalds NET_IPV6, NET_IPV6_NEIGH, "ipv6", 23891da177e4SLinus Torvalds &ndisc_ifinfo_sysctl_change, 23901da177e4SLinus Torvalds NULL); 23911da177e4SLinus Torvalds addrconf_sysctl_register(idev, &idev->cnf); 23921da177e4SLinus Torvalds #endif 2393b217d616SHerbert Xu err = snmp6_register_dev(idev); 2394b217d616SHerbert Xu if (err) 2395b217d616SHerbert Xu return notifier_from_errno(err); 23965632c515SStephen Hemminger } 23971da177e4SLinus Torvalds break; 23983ff50b79SStephen Hemminger } 23991da177e4SLinus Torvalds 24001da177e4SLinus Torvalds return NOTIFY_OK; 24011da177e4SLinus Torvalds } 24021da177e4SLinus Torvalds 24031da177e4SLinus Torvalds /* 24041da177e4SLinus Torvalds * addrconf module should be notified of a device going up 24051da177e4SLinus Torvalds */ 24061da177e4SLinus Torvalds static struct notifier_block ipv6_dev_notf = { 24071da177e4SLinus Torvalds .notifier_call = addrconf_notify, 24081da177e4SLinus Torvalds .priority = 0 24091da177e4SLinus Torvalds }; 24101da177e4SLinus Torvalds 24111da177e4SLinus Torvalds static int addrconf_ifdown(struct net_device *dev, int how) 24121da177e4SLinus Torvalds { 24131da177e4SLinus Torvalds struct inet6_dev *idev; 24141da177e4SLinus Torvalds struct inet6_ifaddr *ifa, **bifa; 24151da177e4SLinus Torvalds int i; 24161da177e4SLinus Torvalds 24171da177e4SLinus Torvalds ASSERT_RTNL(); 24181da177e4SLinus Torvalds 24192774c7abSEric W. Biederman if (dev == init_net.loopback_dev && how == 1) 24201da177e4SLinus Torvalds how = 0; 24211da177e4SLinus Torvalds 24221da177e4SLinus Torvalds rt6_ifdown(dev); 24231da177e4SLinus Torvalds neigh_ifdown(&nd_tbl, dev); 24241da177e4SLinus Torvalds 24251da177e4SLinus Torvalds idev = __in6_dev_get(dev); 24261da177e4SLinus Torvalds if (idev == NULL) 24271da177e4SLinus Torvalds return -ENODEV; 24281da177e4SLinus Torvalds 24291da177e4SLinus Torvalds /* Step 1: remove reference to ipv6 device from parent device. 24301da177e4SLinus Torvalds Do not dev_put! 24311da177e4SLinus Torvalds */ 24321da177e4SLinus Torvalds if (how == 1) { 24331da177e4SLinus Torvalds idev->dead = 1; 24348814c4b5SYOSHIFUJI Hideaki 24358814c4b5SYOSHIFUJI Hideaki /* protected by rtnl_lock */ 24368814c4b5SYOSHIFUJI Hideaki rcu_assign_pointer(dev->ip6_ptr, NULL); 24371da177e4SLinus Torvalds 24381da177e4SLinus Torvalds /* Step 1.5: remove snmp6 entry */ 24391da177e4SLinus Torvalds snmp6_unregister_dev(idev); 24401da177e4SLinus Torvalds 24411da177e4SLinus Torvalds } 24421da177e4SLinus Torvalds 24431da177e4SLinus Torvalds /* Step 2: clear hash table */ 24441da177e4SLinus Torvalds for (i=0; i<IN6_ADDR_HSIZE; i++) { 24451da177e4SLinus Torvalds bifa = &inet6_addr_lst[i]; 24461da177e4SLinus Torvalds 24471da177e4SLinus Torvalds write_lock_bh(&addrconf_hash_lock); 24481da177e4SLinus Torvalds while ((ifa = *bifa) != NULL) { 24491da177e4SLinus Torvalds if (ifa->idev == idev) { 24501da177e4SLinus Torvalds *bifa = ifa->lst_next; 24511da177e4SLinus Torvalds ifa->lst_next = NULL; 24521da177e4SLinus Torvalds addrconf_del_timer(ifa); 24531da177e4SLinus Torvalds in6_ifa_put(ifa); 24541da177e4SLinus Torvalds continue; 24551da177e4SLinus Torvalds } 24561da177e4SLinus Torvalds bifa = &ifa->lst_next; 24571da177e4SLinus Torvalds } 24581da177e4SLinus Torvalds write_unlock_bh(&addrconf_hash_lock); 24591da177e4SLinus Torvalds } 24601da177e4SLinus Torvalds 24611da177e4SLinus Torvalds write_lock_bh(&idev->lock); 24621da177e4SLinus Torvalds 24631da177e4SLinus Torvalds /* Step 3: clear flags for stateless addrconf */ 24641da177e4SLinus Torvalds if (how != 1) 24653c21edbdSYOSHIFUJI Hideaki idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); 24661da177e4SLinus Torvalds 24671da177e4SLinus Torvalds /* Step 4: clear address list */ 24681da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 24691da177e4SLinus Torvalds if (how == 1 && del_timer(&idev->regen_timer)) 24701da177e4SLinus Torvalds in6_dev_put(idev); 24711da177e4SLinus Torvalds 24721da177e4SLinus Torvalds /* clear tempaddr list */ 24731da177e4SLinus Torvalds while ((ifa = idev->tempaddr_list) != NULL) { 24741da177e4SLinus Torvalds idev->tempaddr_list = ifa->tmp_next; 24751da177e4SLinus Torvalds ifa->tmp_next = NULL; 24761da177e4SLinus Torvalds ifa->dead = 1; 24771da177e4SLinus Torvalds write_unlock_bh(&idev->lock); 24781da177e4SLinus Torvalds spin_lock_bh(&ifa->lock); 24791da177e4SLinus Torvalds 24801da177e4SLinus Torvalds if (ifa->ifpub) { 24811da177e4SLinus Torvalds in6_ifa_put(ifa->ifpub); 24821da177e4SLinus Torvalds ifa->ifpub = NULL; 24831da177e4SLinus Torvalds } 24841da177e4SLinus Torvalds spin_unlock_bh(&ifa->lock); 24851da177e4SLinus Torvalds in6_ifa_put(ifa); 24861da177e4SLinus Torvalds write_lock_bh(&idev->lock); 24871da177e4SLinus Torvalds } 24881da177e4SLinus Torvalds #endif 24891da177e4SLinus Torvalds while ((ifa = idev->addr_list) != NULL) { 24901da177e4SLinus Torvalds idev->addr_list = ifa->if_next; 24911da177e4SLinus Torvalds ifa->if_next = NULL; 24921da177e4SLinus Torvalds ifa->dead = 1; 24931da177e4SLinus Torvalds addrconf_del_timer(ifa); 24941da177e4SLinus Torvalds write_unlock_bh(&idev->lock); 24951da177e4SLinus Torvalds 24961da177e4SLinus Torvalds __ipv6_ifa_notify(RTM_DELADDR, ifa); 2497063ed369SVlad Yasevich atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa); 24981da177e4SLinus Torvalds in6_ifa_put(ifa); 24991da177e4SLinus Torvalds 25001da177e4SLinus Torvalds write_lock_bh(&idev->lock); 25011da177e4SLinus Torvalds } 25021da177e4SLinus Torvalds write_unlock_bh(&idev->lock); 25031da177e4SLinus Torvalds 25041da177e4SLinus Torvalds /* Step 5: Discard multicast list */ 25051da177e4SLinus Torvalds 25061da177e4SLinus Torvalds if (how == 1) 25071da177e4SLinus Torvalds ipv6_mc_destroy_dev(idev); 25081da177e4SLinus Torvalds else 25091da177e4SLinus Torvalds ipv6_mc_down(idev); 25101da177e4SLinus Torvalds 25111da177e4SLinus Torvalds idev->tstamp = jiffies; 25121da177e4SLinus Torvalds 25131da177e4SLinus Torvalds /* Shot the device (if unregistered) */ 25141da177e4SLinus Torvalds 25151da177e4SLinus Torvalds if (how == 1) { 25161da177e4SLinus Torvalds #ifdef CONFIG_SYSCTL 25171da177e4SLinus Torvalds addrconf_sysctl_unregister(&idev->cnf); 25181da177e4SLinus Torvalds neigh_sysctl_unregister(idev->nd_parms); 25191da177e4SLinus Torvalds #endif 25201da177e4SLinus Torvalds neigh_parms_release(&nd_tbl, idev->nd_parms); 25211da177e4SLinus Torvalds neigh_ifdown(&nd_tbl, dev); 25221da177e4SLinus Torvalds in6_dev_put(idev); 25231da177e4SLinus Torvalds } 25241da177e4SLinus Torvalds return 0; 25251da177e4SLinus Torvalds } 25261da177e4SLinus Torvalds 25271da177e4SLinus Torvalds static void addrconf_rs_timer(unsigned long data) 25281da177e4SLinus Torvalds { 25291da177e4SLinus Torvalds struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; 25301da177e4SLinus Torvalds 25311da177e4SLinus Torvalds if (ifp->idev->cnf.forwarding) 25321da177e4SLinus Torvalds goto out; 25331da177e4SLinus Torvalds 25341da177e4SLinus Torvalds if (ifp->idev->if_flags & IF_RA_RCVD) { 25351da177e4SLinus Torvalds /* 25361da177e4SLinus Torvalds * Announcement received after solicitation 25371da177e4SLinus Torvalds * was sent 25381da177e4SLinus Torvalds */ 25391da177e4SLinus Torvalds goto out; 25401da177e4SLinus Torvalds } 25411da177e4SLinus Torvalds 25421da177e4SLinus Torvalds spin_lock(&ifp->lock); 25431da177e4SLinus Torvalds if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) { 25441da177e4SLinus Torvalds struct in6_addr all_routers; 25451da177e4SLinus Torvalds 25461da177e4SLinus Torvalds /* The wait after the last probe can be shorter */ 25471da177e4SLinus Torvalds addrconf_mod_timer(ifp, AC_RS, 25481da177e4SLinus Torvalds (ifp->probes == ifp->idev->cnf.rtr_solicits) ? 25491da177e4SLinus Torvalds ifp->idev->cnf.rtr_solicit_delay : 25501da177e4SLinus Torvalds ifp->idev->cnf.rtr_solicit_interval); 25511da177e4SLinus Torvalds spin_unlock(&ifp->lock); 25521da177e4SLinus Torvalds 25531da177e4SLinus Torvalds ipv6_addr_all_routers(&all_routers); 25541da177e4SLinus Torvalds 25551da177e4SLinus Torvalds ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); 25561da177e4SLinus Torvalds } else { 25571da177e4SLinus Torvalds spin_unlock(&ifp->lock); 25581da177e4SLinus Torvalds /* 25591da177e4SLinus Torvalds * Note: we do not support deprecated "all on-link" 25601da177e4SLinus Torvalds * assumption any longer. 25611da177e4SLinus Torvalds */ 25621da177e4SLinus Torvalds printk(KERN_DEBUG "%s: no IPv6 routers present\n", 25631da177e4SLinus Torvalds ifp->idev->dev->name); 25641da177e4SLinus Torvalds } 25651da177e4SLinus Torvalds 25661da177e4SLinus Torvalds out: 25671da177e4SLinus Torvalds in6_ifa_put(ifp); 25681da177e4SLinus Torvalds } 25691da177e4SLinus Torvalds 25701da177e4SLinus Torvalds /* 25711da177e4SLinus Torvalds * Duplicate Address Detection 25721da177e4SLinus Torvalds */ 25733c21edbdSYOSHIFUJI Hideaki static void addrconf_dad_kick(struct inet6_ifaddr *ifp) 25743c21edbdSYOSHIFUJI Hideaki { 25753c21edbdSYOSHIFUJI Hideaki unsigned long rand_num; 25763c21edbdSYOSHIFUJI Hideaki struct inet6_dev *idev = ifp->idev; 25773c21edbdSYOSHIFUJI Hideaki 257895c385b4SNeil Horman if (ifp->flags & IFA_F_OPTIMISTIC) 257995c385b4SNeil Horman rand_num = 0; 258095c385b4SNeil Horman else 25813c21edbdSYOSHIFUJI Hideaki rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); 258295c385b4SNeil Horman 25833c21edbdSYOSHIFUJI Hideaki ifp->probes = idev->cnf.dad_transmits; 25843c21edbdSYOSHIFUJI Hideaki addrconf_mod_timer(ifp, AC_DAD, rand_num); 25853c21edbdSYOSHIFUJI Hideaki } 25863c21edbdSYOSHIFUJI Hideaki 2587e431b8c0SJamal Hadi Salim static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) 25881da177e4SLinus Torvalds { 25891da177e4SLinus Torvalds struct inet6_dev *idev = ifp->idev; 25901da177e4SLinus Torvalds struct net_device *dev = idev->dev; 25911da177e4SLinus Torvalds 25921da177e4SLinus Torvalds addrconf_join_solict(dev, &ifp->addr); 25931da177e4SLinus Torvalds 25941da177e4SLinus Torvalds net_srandom(ifp->addr.s6_addr32[3]); 25951da177e4SLinus Torvalds 25961da177e4SLinus Torvalds read_lock_bh(&idev->lock); 25971da177e4SLinus Torvalds if (ifp->dead) 25981da177e4SLinus Torvalds goto out; 25991da177e4SLinus Torvalds spin_lock_bh(&ifp->lock); 26001da177e4SLinus Torvalds 26011da177e4SLinus Torvalds if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || 260255ebaef1SNoriaki TAKAMIYA !(ifp->flags&IFA_F_TENTATIVE) || 260355ebaef1SNoriaki TAKAMIYA ifp->flags & IFA_F_NODAD) { 260495c385b4SNeil Horman ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC); 26051da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 26061da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 26071da177e4SLinus Torvalds 26081da177e4SLinus Torvalds addrconf_dad_completed(ifp); 26091da177e4SLinus Torvalds return; 26101da177e4SLinus Torvalds } 26111da177e4SLinus Torvalds 26126732badeSYOSHIFUJI Hideaki if (!(idev->if_flags & IF_READY)) { 26133dd3bf83SYOSHIFUJI Hideaki spin_unlock_bh(&ifp->lock); 26146732badeSYOSHIFUJI Hideaki read_unlock_bh(&idev->lock); 26153c21edbdSYOSHIFUJI Hideaki /* 26163c21edbdSYOSHIFUJI Hideaki * If the defice is not ready: 26173c21edbdSYOSHIFUJI Hideaki * - keep it tentative if it is a permanent address. 26183c21edbdSYOSHIFUJI Hideaki * - otherwise, kill it. 26193c21edbdSYOSHIFUJI Hideaki */ 26203c21edbdSYOSHIFUJI Hideaki in6_ifa_hold(ifp); 26213c21edbdSYOSHIFUJI Hideaki addrconf_dad_stop(ifp); 26226732badeSYOSHIFUJI Hideaki return; 26233c21edbdSYOSHIFUJI Hideaki } 262495c385b4SNeil Horman 262595c385b4SNeil Horman /* 262695c385b4SNeil Horman * Optimistic nodes can start receiving 262795c385b4SNeil Horman * Frames right away 262895c385b4SNeil Horman */ 262995c385b4SNeil Horman if(ifp->flags & IFA_F_OPTIMISTIC) 263095c385b4SNeil Horman ip6_ins_rt(ifp->rt); 263195c385b4SNeil Horman 26326732badeSYOSHIFUJI Hideaki addrconf_dad_kick(ifp); 26336732badeSYOSHIFUJI Hideaki spin_unlock_bh(&ifp->lock); 26341da177e4SLinus Torvalds out: 26351da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 26361da177e4SLinus Torvalds } 26371da177e4SLinus Torvalds 26381da177e4SLinus Torvalds static void addrconf_dad_timer(unsigned long data) 26391da177e4SLinus Torvalds { 26401da177e4SLinus Torvalds struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; 26411da177e4SLinus Torvalds struct inet6_dev *idev = ifp->idev; 26421da177e4SLinus Torvalds struct in6_addr unspec; 26431da177e4SLinus Torvalds struct in6_addr mcaddr; 26441da177e4SLinus Torvalds 26451da177e4SLinus Torvalds read_lock_bh(&idev->lock); 26461da177e4SLinus Torvalds if (idev->dead) { 26471da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 26481da177e4SLinus Torvalds goto out; 26491da177e4SLinus Torvalds } 26501da177e4SLinus Torvalds spin_lock_bh(&ifp->lock); 26511da177e4SLinus Torvalds if (ifp->probes == 0) { 26521da177e4SLinus Torvalds /* 26531da177e4SLinus Torvalds * DAD was successful 26541da177e4SLinus Torvalds */ 26551da177e4SLinus Torvalds 265695c385b4SNeil Horman ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC); 26571da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 26581da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 26591da177e4SLinus Torvalds 26601da177e4SLinus Torvalds addrconf_dad_completed(ifp); 26611da177e4SLinus Torvalds 26621da177e4SLinus Torvalds goto out; 26631da177e4SLinus Torvalds } 26641da177e4SLinus Torvalds 26651da177e4SLinus Torvalds ifp->probes--; 26661da177e4SLinus Torvalds addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); 26671da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 26681da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 26691da177e4SLinus Torvalds 26701da177e4SLinus Torvalds /* send a neighbour solicitation for our addr */ 26711da177e4SLinus Torvalds memset(&unspec, 0, sizeof(unspec)); 26721da177e4SLinus Torvalds addrconf_addr_solict_mult(&ifp->addr, &mcaddr); 26731da177e4SLinus Torvalds ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec); 26741da177e4SLinus Torvalds out: 26751da177e4SLinus Torvalds in6_ifa_put(ifp); 26761da177e4SLinus Torvalds } 26771da177e4SLinus Torvalds 26781da177e4SLinus Torvalds static void addrconf_dad_completed(struct inet6_ifaddr *ifp) 26791da177e4SLinus Torvalds { 26801da177e4SLinus Torvalds struct net_device * dev = ifp->idev->dev; 26811da177e4SLinus Torvalds 26821da177e4SLinus Torvalds /* 26831da177e4SLinus Torvalds * Configure the address for reception. Now it is valid. 26841da177e4SLinus Torvalds */ 26851da177e4SLinus Torvalds 26861da177e4SLinus Torvalds ipv6_ifa_notify(RTM_NEWADDR, ifp); 26871da177e4SLinus Torvalds 26881da177e4SLinus Torvalds /* If added prefix is link local and forwarding is off, 26891da177e4SLinus Torvalds start sending router solicitations. 26901da177e4SLinus Torvalds */ 26911da177e4SLinus Torvalds 26921da177e4SLinus Torvalds if (ifp->idev->cnf.forwarding == 0 && 26931da177e4SLinus Torvalds ifp->idev->cnf.rtr_solicits > 0 && 26941da177e4SLinus Torvalds (dev->flags&IFF_LOOPBACK) == 0 && 26951da177e4SLinus Torvalds (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { 26961da177e4SLinus Torvalds struct in6_addr all_routers; 26971da177e4SLinus Torvalds 26981da177e4SLinus Torvalds ipv6_addr_all_routers(&all_routers); 26991da177e4SLinus Torvalds 27001da177e4SLinus Torvalds /* 27011da177e4SLinus Torvalds * If a host as already performed a random delay 27021da177e4SLinus Torvalds * [...] as part of DAD [...] there is no need 27031da177e4SLinus Torvalds * to delay again before sending the first RS 27041da177e4SLinus Torvalds */ 27051da177e4SLinus Torvalds ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); 27061da177e4SLinus Torvalds 27071da177e4SLinus Torvalds spin_lock_bh(&ifp->lock); 27081da177e4SLinus Torvalds ifp->probes = 1; 27091da177e4SLinus Torvalds ifp->idev->if_flags |= IF_RS_SENT; 27101da177e4SLinus Torvalds addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); 27111da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 27121da177e4SLinus Torvalds } 27131da177e4SLinus Torvalds } 27141da177e4SLinus Torvalds 2715c5e33bddSYOSHIFUJI Hideaki static void addrconf_dad_run(struct inet6_dev *idev) { 2716c5e33bddSYOSHIFUJI Hideaki struct inet6_ifaddr *ifp; 2717c5e33bddSYOSHIFUJI Hideaki 2718c5e33bddSYOSHIFUJI Hideaki read_lock_bh(&idev->lock); 2719c5e33bddSYOSHIFUJI Hideaki for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) { 2720c5e33bddSYOSHIFUJI Hideaki spin_lock_bh(&ifp->lock); 2721c5e33bddSYOSHIFUJI Hideaki if (!(ifp->flags & IFA_F_TENTATIVE)) { 2722c5e33bddSYOSHIFUJI Hideaki spin_unlock_bh(&ifp->lock); 2723c5e33bddSYOSHIFUJI Hideaki continue; 2724c5e33bddSYOSHIFUJI Hideaki } 2725c5e33bddSYOSHIFUJI Hideaki spin_unlock_bh(&ifp->lock); 2726c5e33bddSYOSHIFUJI Hideaki addrconf_dad_kick(ifp); 2727c5e33bddSYOSHIFUJI Hideaki } 2728c5e33bddSYOSHIFUJI Hideaki read_unlock_bh(&idev->lock); 2729c5e33bddSYOSHIFUJI Hideaki } 2730c5e33bddSYOSHIFUJI Hideaki 27311da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 27321da177e4SLinus Torvalds struct if6_iter_state { 27331da177e4SLinus Torvalds int bucket; 27341da177e4SLinus Torvalds }; 27351da177e4SLinus Torvalds 27361da177e4SLinus Torvalds static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) 27371da177e4SLinus Torvalds { 27381da177e4SLinus Torvalds struct inet6_ifaddr *ifa = NULL; 27391da177e4SLinus Torvalds struct if6_iter_state *state = seq->private; 27401da177e4SLinus Torvalds 27411da177e4SLinus Torvalds for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { 27421da177e4SLinus Torvalds ifa = inet6_addr_lst[state->bucket]; 27431da177e4SLinus Torvalds if (ifa) 27441da177e4SLinus Torvalds break; 27451da177e4SLinus Torvalds } 27461da177e4SLinus Torvalds return ifa; 27471da177e4SLinus Torvalds } 27481da177e4SLinus Torvalds 27491da177e4SLinus Torvalds static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa) 27501da177e4SLinus Torvalds { 27511da177e4SLinus Torvalds struct if6_iter_state *state = seq->private; 27521da177e4SLinus Torvalds 27531da177e4SLinus Torvalds ifa = ifa->lst_next; 27541da177e4SLinus Torvalds try_again: 27551da177e4SLinus Torvalds if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) { 27561da177e4SLinus Torvalds ifa = inet6_addr_lst[state->bucket]; 27571da177e4SLinus Torvalds goto try_again; 27581da177e4SLinus Torvalds } 27591da177e4SLinus Torvalds return ifa; 27601da177e4SLinus Torvalds } 27611da177e4SLinus Torvalds 27621da177e4SLinus Torvalds static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) 27631da177e4SLinus Torvalds { 27641da177e4SLinus Torvalds struct inet6_ifaddr *ifa = if6_get_first(seq); 27651da177e4SLinus Torvalds 27661da177e4SLinus Torvalds if (ifa) 27671da177e4SLinus Torvalds while(pos && (ifa = if6_get_next(seq, ifa)) != NULL) 27681da177e4SLinus Torvalds --pos; 27691da177e4SLinus Torvalds return pos ? NULL : ifa; 27701da177e4SLinus Torvalds } 27711da177e4SLinus Torvalds 27721da177e4SLinus Torvalds static void *if6_seq_start(struct seq_file *seq, loff_t *pos) 27731da177e4SLinus Torvalds { 27741da177e4SLinus Torvalds read_lock_bh(&addrconf_hash_lock); 27751da177e4SLinus Torvalds return if6_get_idx(seq, *pos); 27761da177e4SLinus Torvalds } 27771da177e4SLinus Torvalds 27781da177e4SLinus Torvalds static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) 27791da177e4SLinus Torvalds { 27801da177e4SLinus Torvalds struct inet6_ifaddr *ifa; 27811da177e4SLinus Torvalds 27821da177e4SLinus Torvalds ifa = if6_get_next(seq, v); 27831da177e4SLinus Torvalds ++*pos; 27841da177e4SLinus Torvalds return ifa; 27851da177e4SLinus Torvalds } 27861da177e4SLinus Torvalds 27871da177e4SLinus Torvalds static void if6_seq_stop(struct seq_file *seq, void *v) 27881da177e4SLinus Torvalds { 27891da177e4SLinus Torvalds read_unlock_bh(&addrconf_hash_lock); 27901da177e4SLinus Torvalds } 27911da177e4SLinus Torvalds 27921da177e4SLinus Torvalds static int if6_seq_show(struct seq_file *seq, void *v) 27931da177e4SLinus Torvalds { 27941da177e4SLinus Torvalds struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; 27951da177e4SLinus Torvalds seq_printf(seq, 27969343e79aSYOSHIFUJI Hideaki NIP6_SEQFMT " %02x %02x %02x %02x %8s\n", 27971da177e4SLinus Torvalds NIP6(ifp->addr), 27981da177e4SLinus Torvalds ifp->idev->dev->ifindex, 27991da177e4SLinus Torvalds ifp->prefix_len, 28001da177e4SLinus Torvalds ifp->scope, 28011da177e4SLinus Torvalds ifp->flags, 28021da177e4SLinus Torvalds ifp->idev->dev->name); 28031da177e4SLinus Torvalds return 0; 28041da177e4SLinus Torvalds } 28051da177e4SLinus Torvalds 280656b3d975SPhilippe De Muyter static const struct seq_operations if6_seq_ops = { 28071da177e4SLinus Torvalds .start = if6_seq_start, 28081da177e4SLinus Torvalds .next = if6_seq_next, 28091da177e4SLinus Torvalds .show = if6_seq_show, 28101da177e4SLinus Torvalds .stop = if6_seq_stop, 28111da177e4SLinus Torvalds }; 28121da177e4SLinus Torvalds 28131da177e4SLinus Torvalds static int if6_seq_open(struct inode *inode, struct file *file) 28141da177e4SLinus Torvalds { 2815cf7732e4SPavel Emelyanov return seq_open_private(file, &if6_seq_ops, 2816cf7732e4SPavel Emelyanov sizeof(struct if6_iter_state)); 28171da177e4SLinus Torvalds } 28181da177e4SLinus Torvalds 28199a32144eSArjan van de Ven static const struct file_operations if6_fops = { 28201da177e4SLinus Torvalds .owner = THIS_MODULE, 28211da177e4SLinus Torvalds .open = if6_seq_open, 28221da177e4SLinus Torvalds .read = seq_read, 28231da177e4SLinus Torvalds .llseek = seq_lseek, 28241da177e4SLinus Torvalds .release = seq_release_private, 28251da177e4SLinus Torvalds }; 28261da177e4SLinus Torvalds 28271da177e4SLinus Torvalds int __init if6_proc_init(void) 28281da177e4SLinus Torvalds { 2829457c4cbcSEric W. Biederman if (!proc_net_fops_create(&init_net, "if_inet6", S_IRUGO, &if6_fops)) 28301da177e4SLinus Torvalds return -ENOMEM; 28311da177e4SLinus Torvalds return 0; 28321da177e4SLinus Torvalds } 28331da177e4SLinus Torvalds 28341da177e4SLinus Torvalds void if6_proc_exit(void) 28351da177e4SLinus Torvalds { 2836457c4cbcSEric W. Biederman proc_net_remove(&init_net, "if_inet6"); 28371da177e4SLinus Torvalds } 28381da177e4SLinus Torvalds #endif /* CONFIG_PROC_FS */ 28391da177e4SLinus Torvalds 284059fbb3a6SMasahide NAKAMURA #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) 28413b9f9a1cSNoriaki TAKAMIYA /* Check if address is a home address configured on any interface. */ 28423b9f9a1cSNoriaki TAKAMIYA int ipv6_chk_home_addr(struct in6_addr *addr) 28433b9f9a1cSNoriaki TAKAMIYA { 28443b9f9a1cSNoriaki TAKAMIYA int ret = 0; 28453b9f9a1cSNoriaki TAKAMIYA struct inet6_ifaddr * ifp; 28463b9f9a1cSNoriaki TAKAMIYA u8 hash = ipv6_addr_hash(addr); 28473b9f9a1cSNoriaki TAKAMIYA read_lock_bh(&addrconf_hash_lock); 28483b9f9a1cSNoriaki TAKAMIYA for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) { 28493b9f9a1cSNoriaki TAKAMIYA if (ipv6_addr_cmp(&ifp->addr, addr) == 0 && 28503b9f9a1cSNoriaki TAKAMIYA (ifp->flags & IFA_F_HOMEADDRESS)) { 28513b9f9a1cSNoriaki TAKAMIYA ret = 1; 28523b9f9a1cSNoriaki TAKAMIYA break; 28533b9f9a1cSNoriaki TAKAMIYA } 28543b9f9a1cSNoriaki TAKAMIYA } 28553b9f9a1cSNoriaki TAKAMIYA read_unlock_bh(&addrconf_hash_lock); 28563b9f9a1cSNoriaki TAKAMIYA return ret; 28573b9f9a1cSNoriaki TAKAMIYA } 28583b9f9a1cSNoriaki TAKAMIYA #endif 28593b9f9a1cSNoriaki TAKAMIYA 28601da177e4SLinus Torvalds /* 28611da177e4SLinus Torvalds * Periodic address status verification 28621da177e4SLinus Torvalds */ 28631da177e4SLinus Torvalds 28641da177e4SLinus Torvalds static void addrconf_verify(unsigned long foo) 28651da177e4SLinus Torvalds { 28661da177e4SLinus Torvalds struct inet6_ifaddr *ifp; 28671da177e4SLinus Torvalds unsigned long now, next; 28681da177e4SLinus Torvalds int i; 28691da177e4SLinus Torvalds 28701da177e4SLinus Torvalds spin_lock_bh(&addrconf_verify_lock); 28711da177e4SLinus Torvalds now = jiffies; 28721da177e4SLinus Torvalds next = now + ADDR_CHECK_FREQUENCY; 28731da177e4SLinus Torvalds 28741da177e4SLinus Torvalds del_timer(&addr_chk_timer); 28751da177e4SLinus Torvalds 28761da177e4SLinus Torvalds for (i=0; i < IN6_ADDR_HSIZE; i++) { 28771da177e4SLinus Torvalds 28781da177e4SLinus Torvalds restart: 28795d5780dfSYan Zheng read_lock(&addrconf_hash_lock); 28801da177e4SLinus Torvalds for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) { 28811da177e4SLinus Torvalds unsigned long age; 28821da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 28831da177e4SLinus Torvalds unsigned long regen_advance; 28841da177e4SLinus Torvalds #endif 28851da177e4SLinus Torvalds 28861da177e4SLinus Torvalds if (ifp->flags & IFA_F_PERMANENT) 28871da177e4SLinus Torvalds continue; 28881da177e4SLinus Torvalds 28891da177e4SLinus Torvalds spin_lock(&ifp->lock); 28901da177e4SLinus Torvalds age = (now - ifp->tstamp) / HZ; 28911da177e4SLinus Torvalds 28921da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 28931da177e4SLinus Torvalds regen_advance = ifp->idev->cnf.regen_max_retry * 28941da177e4SLinus Torvalds ifp->idev->cnf.dad_transmits * 28951da177e4SLinus Torvalds ifp->idev->nd_parms->retrans_time / HZ; 28961da177e4SLinus Torvalds #endif 28971da177e4SLinus Torvalds 28988f27ebb9SYOSHIFUJI Hideaki if (ifp->valid_lft != INFINITY_LIFE_TIME && 28998f27ebb9SYOSHIFUJI Hideaki age >= ifp->valid_lft) { 29001da177e4SLinus Torvalds spin_unlock(&ifp->lock); 29011da177e4SLinus Torvalds in6_ifa_hold(ifp); 29025d5780dfSYan Zheng read_unlock(&addrconf_hash_lock); 29031da177e4SLinus Torvalds ipv6_del_addr(ifp); 29041da177e4SLinus Torvalds goto restart; 29058f27ebb9SYOSHIFUJI Hideaki } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { 29068f27ebb9SYOSHIFUJI Hideaki spin_unlock(&ifp->lock); 29078f27ebb9SYOSHIFUJI Hideaki continue; 29081da177e4SLinus Torvalds } else if (age >= ifp->prefered_lft) { 29091da177e4SLinus Torvalds /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */ 29101da177e4SLinus Torvalds int deprecate = 0; 29111da177e4SLinus Torvalds 29121da177e4SLinus Torvalds if (!(ifp->flags&IFA_F_DEPRECATED)) { 29131da177e4SLinus Torvalds deprecate = 1; 29141da177e4SLinus Torvalds ifp->flags |= IFA_F_DEPRECATED; 29151da177e4SLinus Torvalds } 29161da177e4SLinus Torvalds 29171da177e4SLinus Torvalds if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) 29181da177e4SLinus Torvalds next = ifp->tstamp + ifp->valid_lft * HZ; 29191da177e4SLinus Torvalds 29201da177e4SLinus Torvalds spin_unlock(&ifp->lock); 29211da177e4SLinus Torvalds 29221da177e4SLinus Torvalds if (deprecate) { 29231da177e4SLinus Torvalds in6_ifa_hold(ifp); 29245d5780dfSYan Zheng read_unlock(&addrconf_hash_lock); 29251da177e4SLinus Torvalds 29261da177e4SLinus Torvalds ipv6_ifa_notify(0, ifp); 29271da177e4SLinus Torvalds in6_ifa_put(ifp); 29281da177e4SLinus Torvalds goto restart; 29291da177e4SLinus Torvalds } 29301da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 29311da177e4SLinus Torvalds } else if ((ifp->flags&IFA_F_TEMPORARY) && 29321da177e4SLinus Torvalds !(ifp->flags&IFA_F_TENTATIVE)) { 29331da177e4SLinus Torvalds if (age >= ifp->prefered_lft - regen_advance) { 29341da177e4SLinus Torvalds struct inet6_ifaddr *ifpub = ifp->ifpub; 29351da177e4SLinus Torvalds if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) 29361da177e4SLinus Torvalds next = ifp->tstamp + ifp->prefered_lft * HZ; 29371da177e4SLinus Torvalds if (!ifp->regen_count && ifpub) { 29381da177e4SLinus Torvalds ifp->regen_count++; 29391da177e4SLinus Torvalds in6_ifa_hold(ifp); 29401da177e4SLinus Torvalds in6_ifa_hold(ifpub); 29411da177e4SLinus Torvalds spin_unlock(&ifp->lock); 29425d5780dfSYan Zheng read_unlock(&addrconf_hash_lock); 2943291d809bSHiroyuki YAMAMORI spin_lock(&ifpub->lock); 2944291d809bSHiroyuki YAMAMORI ifpub->regen_count = 0; 2945291d809bSHiroyuki YAMAMORI spin_unlock(&ifpub->lock); 29461da177e4SLinus Torvalds ipv6_create_tempaddr(ifpub, ifp); 29471da177e4SLinus Torvalds in6_ifa_put(ifpub); 29481da177e4SLinus Torvalds in6_ifa_put(ifp); 29491da177e4SLinus Torvalds goto restart; 29501da177e4SLinus Torvalds } 29511da177e4SLinus Torvalds } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) 29521da177e4SLinus Torvalds next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; 29531da177e4SLinus Torvalds spin_unlock(&ifp->lock); 29541da177e4SLinus Torvalds #endif 29551da177e4SLinus Torvalds } else { 29561da177e4SLinus Torvalds /* ifp->prefered_lft <= ifp->valid_lft */ 29571da177e4SLinus Torvalds if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) 29581da177e4SLinus Torvalds next = ifp->tstamp + ifp->prefered_lft * HZ; 29591da177e4SLinus Torvalds spin_unlock(&ifp->lock); 29601da177e4SLinus Torvalds } 29611da177e4SLinus Torvalds } 29625d5780dfSYan Zheng read_unlock(&addrconf_hash_lock); 29631da177e4SLinus Torvalds } 29641da177e4SLinus Torvalds 29651da177e4SLinus Torvalds addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next; 29661da177e4SLinus Torvalds add_timer(&addr_chk_timer); 29671da177e4SLinus Torvalds spin_unlock_bh(&addrconf_verify_lock); 29681da177e4SLinus Torvalds } 29691da177e4SLinus Torvalds 2970461d8837SThomas Graf static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) 2971461d8837SThomas Graf { 2972461d8837SThomas Graf struct in6_addr *pfx = NULL; 2973461d8837SThomas Graf 2974461d8837SThomas Graf if (addr) 2975461d8837SThomas Graf pfx = nla_data(addr); 2976461d8837SThomas Graf 2977461d8837SThomas Graf if (local) { 2978461d8837SThomas Graf if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) 2979461d8837SThomas Graf pfx = NULL; 2980461d8837SThomas Graf else 2981461d8837SThomas Graf pfx = nla_data(local); 2982461d8837SThomas Graf } 2983461d8837SThomas Graf 2984461d8837SThomas Graf return pfx; 2985461d8837SThomas Graf } 2986461d8837SThomas Graf 2987ef7c79edSPatrick McHardy static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { 2988461d8837SThomas Graf [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, 2989461d8837SThomas Graf [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, 2990461d8837SThomas Graf [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, 2991461d8837SThomas Graf }; 2992461d8837SThomas Graf 29931da177e4SLinus Torvalds static int 29941da177e4SLinus Torvalds inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 29951da177e4SLinus Torvalds { 2996b933f716SThomas Graf struct ifaddrmsg *ifm; 2997b933f716SThomas Graf struct nlattr *tb[IFA_MAX+1]; 29981da177e4SLinus Torvalds struct in6_addr *pfx; 2999b933f716SThomas Graf int err; 30001da177e4SLinus Torvalds 3001b933f716SThomas Graf err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); 3002b933f716SThomas Graf if (err < 0) 3003b933f716SThomas Graf return err; 3004b933f716SThomas Graf 3005b933f716SThomas Graf ifm = nlmsg_data(nlh); 3006b933f716SThomas Graf pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); 30071da177e4SLinus Torvalds if (pfx == NULL) 30081da177e4SLinus Torvalds return -EINVAL; 30091da177e4SLinus Torvalds 30101da177e4SLinus Torvalds return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen); 30111da177e4SLinus Torvalds } 30121da177e4SLinus Torvalds 301355ebaef1SNoriaki TAKAMIYA static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, 301455ebaef1SNoriaki TAKAMIYA u32 prefered_lft, u32 valid_lft) 3015081bba5bSNoriaki TAKAMIYA { 301646d48046SYOSHIFUJI Hideaki u32 flags = RTF_EXPIRES; 301746d48046SYOSHIFUJI Hideaki 3018081bba5bSNoriaki TAKAMIYA if (!valid_lft || (prefered_lft > valid_lft)) 3019081bba5bSNoriaki TAKAMIYA return -EINVAL; 3020081bba5bSNoriaki TAKAMIYA 302146d48046SYOSHIFUJI Hideaki if (valid_lft == INFINITY_LIFE_TIME) { 302255ebaef1SNoriaki TAKAMIYA ifa_flags |= IFA_F_PERMANENT; 302346d48046SYOSHIFUJI Hideaki flags = 0; 302446d48046SYOSHIFUJI Hideaki } else if (valid_lft >= 0x7FFFFFFF/HZ) 3025081bba5bSNoriaki TAKAMIYA valid_lft = 0x7FFFFFFF/HZ; 3026081bba5bSNoriaki TAKAMIYA 3027081bba5bSNoriaki TAKAMIYA if (prefered_lft == 0) 302855ebaef1SNoriaki TAKAMIYA ifa_flags |= IFA_F_DEPRECATED; 3029081bba5bSNoriaki TAKAMIYA else if ((prefered_lft >= 0x7FFFFFFF/HZ) && 3030081bba5bSNoriaki TAKAMIYA (prefered_lft != INFINITY_LIFE_TIME)) 3031081bba5bSNoriaki TAKAMIYA prefered_lft = 0x7FFFFFFF/HZ; 3032081bba5bSNoriaki TAKAMIYA 3033081bba5bSNoriaki TAKAMIYA spin_lock_bh(&ifp->lock); 30343b9f9a1cSNoriaki TAKAMIYA ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; 3035081bba5bSNoriaki TAKAMIYA ifp->tstamp = jiffies; 3036081bba5bSNoriaki TAKAMIYA ifp->valid_lft = valid_lft; 3037081bba5bSNoriaki TAKAMIYA ifp->prefered_lft = prefered_lft; 3038081bba5bSNoriaki TAKAMIYA 3039081bba5bSNoriaki TAKAMIYA spin_unlock_bh(&ifp->lock); 3040081bba5bSNoriaki TAKAMIYA if (!(ifp->flags&IFA_F_TENTATIVE)) 3041081bba5bSNoriaki TAKAMIYA ipv6_ifa_notify(0, ifp); 3042081bba5bSNoriaki TAKAMIYA 304346d48046SYOSHIFUJI Hideaki addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, 304446d48046SYOSHIFUJI Hideaki jiffies_to_clock_t(valid_lft * HZ), flags); 3045081bba5bSNoriaki TAKAMIYA addrconf_verify(0); 3046081bba5bSNoriaki TAKAMIYA 3047081bba5bSNoriaki TAKAMIYA return 0; 3048081bba5bSNoriaki TAKAMIYA } 3049081bba5bSNoriaki TAKAMIYA 3050081bba5bSNoriaki TAKAMIYA static int 30511da177e4SLinus Torvalds inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 30521da177e4SLinus Torvalds { 3053461d8837SThomas Graf struct ifaddrmsg *ifm; 3054461d8837SThomas Graf struct nlattr *tb[IFA_MAX+1]; 30551da177e4SLinus Torvalds struct in6_addr *pfx; 30567198f8ceSThomas Graf struct inet6_ifaddr *ifa; 30577198f8ceSThomas Graf struct net_device *dev; 305855ebaef1SNoriaki TAKAMIYA u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; 305955ebaef1SNoriaki TAKAMIYA u8 ifa_flags; 3060461d8837SThomas Graf int err; 30611da177e4SLinus Torvalds 3062461d8837SThomas Graf err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); 3063461d8837SThomas Graf if (err < 0) 3064461d8837SThomas Graf return err; 3065461d8837SThomas Graf 3066461d8837SThomas Graf ifm = nlmsg_data(nlh); 3067461d8837SThomas Graf pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); 30681da177e4SLinus Torvalds if (pfx == NULL) 30691da177e4SLinus Torvalds return -EINVAL; 30701da177e4SLinus Torvalds 3071461d8837SThomas Graf if (tb[IFA_CACHEINFO]) { 30720778769dSNoriaki TAKAMIYA struct ifa_cacheinfo *ci; 3073461d8837SThomas Graf 3074461d8837SThomas Graf ci = nla_data(tb[IFA_CACHEINFO]); 30750778769dSNoriaki TAKAMIYA valid_lft = ci->ifa_valid; 3076461d8837SThomas Graf preferred_lft = ci->ifa_prefered; 3077461d8837SThomas Graf } else { 3078461d8837SThomas Graf preferred_lft = INFINITY_LIFE_TIME; 3079461d8837SThomas Graf valid_lft = INFINITY_LIFE_TIME; 30800778769dSNoriaki TAKAMIYA } 30810778769dSNoriaki TAKAMIYA 3082881d966bSEric W. Biederman dev = __dev_get_by_index(&init_net, ifm->ifa_index); 30837198f8ceSThomas Graf if (dev == NULL) 30847198f8ceSThomas Graf return -ENODEV; 3085081bba5bSNoriaki TAKAMIYA 308655ebaef1SNoriaki TAKAMIYA /* We ignore other flags so far. */ 30873b9f9a1cSNoriaki TAKAMIYA ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); 308855ebaef1SNoriaki TAKAMIYA 30897198f8ceSThomas Graf ifa = ipv6_get_ifaddr(pfx, dev, 1); 30907198f8ceSThomas Graf if (ifa == NULL) { 30917198f8ceSThomas Graf /* 30927198f8ceSThomas Graf * It would be best to check for !NLM_F_CREATE here but 30937198f8ceSThomas Graf * userspace alreay relies on not having to provide this. 30947198f8ceSThomas Graf */ 30950778769dSNoriaki TAKAMIYA return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen, 309655ebaef1SNoriaki TAKAMIYA ifa_flags, preferred_lft, valid_lft); 30971da177e4SLinus Torvalds } 30981da177e4SLinus Torvalds 30997198f8ceSThomas Graf if (nlh->nlmsg_flags & NLM_F_EXCL || 31007198f8ceSThomas Graf !(nlh->nlmsg_flags & NLM_F_REPLACE)) 31017198f8ceSThomas Graf err = -EEXIST; 31027198f8ceSThomas Graf else 310355ebaef1SNoriaki TAKAMIYA err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); 31047198f8ceSThomas Graf 31057198f8ceSThomas Graf in6_ifa_put(ifa); 31067198f8ceSThomas Graf 31077198f8ceSThomas Graf return err; 31087198f8ceSThomas Graf } 31097198f8ceSThomas Graf 3110101bb229SThomas Graf static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, 3111101bb229SThomas Graf u8 scope, int ifindex) 3112101bb229SThomas Graf { 3113101bb229SThomas Graf struct ifaddrmsg *ifm; 3114101bb229SThomas Graf 3115101bb229SThomas Graf ifm = nlmsg_data(nlh); 3116101bb229SThomas Graf ifm->ifa_family = AF_INET6; 3117101bb229SThomas Graf ifm->ifa_prefixlen = prefixlen; 3118101bb229SThomas Graf ifm->ifa_flags = flags; 3119101bb229SThomas Graf ifm->ifa_scope = scope; 3120101bb229SThomas Graf ifm->ifa_index = ifindex; 3121101bb229SThomas Graf } 3122101bb229SThomas Graf 312385486af0SThomas Graf static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, 312485486af0SThomas Graf unsigned long tstamp, u32 preferred, u32 valid) 312585486af0SThomas Graf { 312685486af0SThomas Graf struct ifa_cacheinfo ci; 312785486af0SThomas Graf 312885486af0SThomas Graf ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100 312985486af0SThomas Graf + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); 313085486af0SThomas Graf ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100 313185486af0SThomas Graf + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); 313285486af0SThomas Graf ci.ifa_prefered = preferred; 313385486af0SThomas Graf ci.ifa_valid = valid; 313485486af0SThomas Graf 313585486af0SThomas Graf return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); 313685486af0SThomas Graf } 313785486af0SThomas Graf 3138101bb229SThomas Graf static inline int rt_scope(int ifa_scope) 3139101bb229SThomas Graf { 3140101bb229SThomas Graf if (ifa_scope & IFA_HOST) 3141101bb229SThomas Graf return RT_SCOPE_HOST; 3142101bb229SThomas Graf else if (ifa_scope & IFA_LINK) 3143101bb229SThomas Graf return RT_SCOPE_LINK; 3144101bb229SThomas Graf else if (ifa_scope & IFA_SITE) 3145101bb229SThomas Graf return RT_SCOPE_SITE; 3146101bb229SThomas Graf else 3147101bb229SThomas Graf return RT_SCOPE_UNIVERSE; 3148101bb229SThomas Graf } 3149101bb229SThomas Graf 31500ab6803bSThomas Graf static inline int inet6_ifaddr_msgsize(void) 31510ab6803bSThomas Graf { 3152339bf98fSThomas Graf return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) 3153339bf98fSThomas Graf + nla_total_size(16) /* IFA_ADDRESS */ 3154339bf98fSThomas Graf + nla_total_size(sizeof(struct ifa_cacheinfo)); 31550ab6803bSThomas Graf } 3156c5396a31SYOSHIFUJI Hideaki 31571da177e4SLinus Torvalds static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, 3158b6544c0bSJamal Hadi Salim u32 pid, u32 seq, int event, unsigned int flags) 31591da177e4SLinus Torvalds { 31601da177e4SLinus Torvalds struct nlmsghdr *nlh; 316185486af0SThomas Graf u32 preferred, valid; 31621da177e4SLinus Torvalds 31630ab6803bSThomas Graf nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); 31640ab6803bSThomas Graf if (nlh == NULL) 316526932566SPatrick McHardy return -EMSGSIZE; 31660ab6803bSThomas Graf 3167101bb229SThomas Graf put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), 3168101bb229SThomas Graf ifa->idev->dev->ifindex); 3169101bb229SThomas Graf 31701da177e4SLinus Torvalds if (!(ifa->flags&IFA_F_PERMANENT)) { 317185486af0SThomas Graf preferred = ifa->prefered_lft; 317285486af0SThomas Graf valid = ifa->valid_lft; 317385486af0SThomas Graf if (preferred != INFINITY_LIFE_TIME) { 31741da177e4SLinus Torvalds long tval = (jiffies - ifa->tstamp)/HZ; 317585486af0SThomas Graf preferred -= tval; 317685486af0SThomas Graf if (valid != INFINITY_LIFE_TIME) 317785486af0SThomas Graf valid -= tval; 31781da177e4SLinus Torvalds } 31791da177e4SLinus Torvalds } else { 318085486af0SThomas Graf preferred = INFINITY_LIFE_TIME; 318185486af0SThomas Graf valid = INFINITY_LIFE_TIME; 31821da177e4SLinus Torvalds } 318385486af0SThomas Graf 31840ab6803bSThomas Graf if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || 318526932566SPatrick McHardy put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { 318626932566SPatrick McHardy nlmsg_cancel(skb, nlh); 318726932566SPatrick McHardy return -EMSGSIZE; 318826932566SPatrick McHardy } 318985486af0SThomas Graf 31900ab6803bSThomas Graf return nlmsg_end(skb, nlh); 31911da177e4SLinus Torvalds } 31921da177e4SLinus Torvalds 31931da177e4SLinus Torvalds static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, 3194e431b8c0SJamal Hadi Salim u32 pid, u32 seq, int event, u16 flags) 31951da177e4SLinus Torvalds { 31961da177e4SLinus Torvalds struct nlmsghdr *nlh; 3197101bb229SThomas Graf u8 scope = RT_SCOPE_UNIVERSE; 3198101bb229SThomas Graf int ifindex = ifmca->idev->dev->ifindex; 31991da177e4SLinus Torvalds 32001da177e4SLinus Torvalds if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) 3201101bb229SThomas Graf scope = RT_SCOPE_SITE; 3202101bb229SThomas Graf 32030ab6803bSThomas Graf nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); 32040ab6803bSThomas Graf if (nlh == NULL) 320526932566SPatrick McHardy return -EMSGSIZE; 32060ab6803bSThomas Graf 3207101bb229SThomas Graf put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); 32080ab6803bSThomas Graf if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || 32090ab6803bSThomas Graf put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, 321026932566SPatrick McHardy INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { 321126932566SPatrick McHardy nlmsg_cancel(skb, nlh); 321226932566SPatrick McHardy return -EMSGSIZE; 321326932566SPatrick McHardy } 321485486af0SThomas Graf 32150ab6803bSThomas Graf return nlmsg_end(skb, nlh); 32161da177e4SLinus Torvalds } 32171da177e4SLinus Torvalds 32181da177e4SLinus Torvalds static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, 3219b6544c0bSJamal Hadi Salim u32 pid, u32 seq, int event, unsigned int flags) 32201da177e4SLinus Torvalds { 32211da177e4SLinus Torvalds struct nlmsghdr *nlh; 3222101bb229SThomas Graf u8 scope = RT_SCOPE_UNIVERSE; 3223101bb229SThomas Graf int ifindex = ifaca->aca_idev->dev->ifindex; 32241da177e4SLinus Torvalds 32251da177e4SLinus Torvalds if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) 3226101bb229SThomas Graf scope = RT_SCOPE_SITE; 3227101bb229SThomas Graf 32280ab6803bSThomas Graf nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); 32290ab6803bSThomas Graf if (nlh == NULL) 323026932566SPatrick McHardy return -EMSGSIZE; 32310ab6803bSThomas Graf 3232101bb229SThomas Graf put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); 32330ab6803bSThomas Graf if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || 32340ab6803bSThomas Graf put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, 323526932566SPatrick McHardy INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { 323626932566SPatrick McHardy nlmsg_cancel(skb, nlh); 323726932566SPatrick McHardy return -EMSGSIZE; 323826932566SPatrick McHardy } 323985486af0SThomas Graf 32400ab6803bSThomas Graf return nlmsg_end(skb, nlh); 32411da177e4SLinus Torvalds } 32421da177e4SLinus Torvalds 32431da177e4SLinus Torvalds enum addr_type_t 32441da177e4SLinus Torvalds { 32451da177e4SLinus Torvalds UNICAST_ADDR, 32461da177e4SLinus Torvalds MULTICAST_ADDR, 32471da177e4SLinus Torvalds ANYCAST_ADDR, 32481da177e4SLinus Torvalds }; 32491da177e4SLinus Torvalds 32501da177e4SLinus Torvalds static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, 32511da177e4SLinus Torvalds enum addr_type_t type) 32521da177e4SLinus Torvalds { 32531da177e4SLinus Torvalds int idx, ip_idx; 32541da177e4SLinus Torvalds int s_idx, s_ip_idx; 32551da177e4SLinus Torvalds int err = 1; 32561da177e4SLinus Torvalds struct net_device *dev; 32571da177e4SLinus Torvalds struct inet6_dev *idev = NULL; 32581da177e4SLinus Torvalds struct inet6_ifaddr *ifa; 32591da177e4SLinus Torvalds struct ifmcaddr6 *ifmca; 32601da177e4SLinus Torvalds struct ifacaddr6 *ifaca; 32611da177e4SLinus Torvalds 32621da177e4SLinus Torvalds s_idx = cb->args[0]; 32631da177e4SLinus Torvalds s_ip_idx = ip_idx = cb->args[1]; 32641da177e4SLinus Torvalds 32657562f876SPavel Emelianov idx = 0; 3266881d966bSEric W. Biederman for_each_netdev(&init_net, dev) { 32671da177e4SLinus Torvalds if (idx < s_idx) 32687562f876SPavel Emelianov goto cont; 32691da177e4SLinus Torvalds if (idx > s_idx) 32701da177e4SLinus Torvalds s_ip_idx = 0; 32711da177e4SLinus Torvalds ip_idx = 0; 32721da177e4SLinus Torvalds if ((idev = in6_dev_get(dev)) == NULL) 32737562f876SPavel Emelianov goto cont; 32741da177e4SLinus Torvalds read_lock_bh(&idev->lock); 32751da177e4SLinus Torvalds switch (type) { 32761da177e4SLinus Torvalds case UNICAST_ADDR: 3277ae9cda5dSYOSHIFUJI Hideaki /* unicast address incl. temp addr */ 32781da177e4SLinus Torvalds for (ifa = idev->addr_list; ifa; 32791da177e4SLinus Torvalds ifa = ifa->if_next, ip_idx++) { 32801da177e4SLinus Torvalds if (ip_idx < s_ip_idx) 32811da177e4SLinus Torvalds continue; 32821da177e4SLinus Torvalds if ((err = inet6_fill_ifaddr(skb, ifa, 32831da177e4SLinus Torvalds NETLINK_CB(cb->skb).pid, 3284b6544c0bSJamal Hadi Salim cb->nlh->nlmsg_seq, RTM_NEWADDR, 3285b6544c0bSJamal Hadi Salim NLM_F_MULTI)) <= 0) 32861da177e4SLinus Torvalds goto done; 32871da177e4SLinus Torvalds } 32881da177e4SLinus Torvalds break; 32891da177e4SLinus Torvalds case MULTICAST_ADDR: 32901da177e4SLinus Torvalds /* multicast address */ 32911da177e4SLinus Torvalds for (ifmca = idev->mc_list; ifmca; 32921da177e4SLinus Torvalds ifmca = ifmca->next, ip_idx++) { 32931da177e4SLinus Torvalds if (ip_idx < s_ip_idx) 32941da177e4SLinus Torvalds continue; 32951da177e4SLinus Torvalds if ((err = inet6_fill_ifmcaddr(skb, ifmca, 32961da177e4SLinus Torvalds NETLINK_CB(cb->skb).pid, 3297b6544c0bSJamal Hadi Salim cb->nlh->nlmsg_seq, RTM_GETMULTICAST, 3298b6544c0bSJamal Hadi Salim NLM_F_MULTI)) <= 0) 32991da177e4SLinus Torvalds goto done; 33001da177e4SLinus Torvalds } 33011da177e4SLinus Torvalds break; 33021da177e4SLinus Torvalds case ANYCAST_ADDR: 33031da177e4SLinus Torvalds /* anycast address */ 33041da177e4SLinus Torvalds for (ifaca = idev->ac_list; ifaca; 33051da177e4SLinus Torvalds ifaca = ifaca->aca_next, ip_idx++) { 33061da177e4SLinus Torvalds if (ip_idx < s_ip_idx) 33071da177e4SLinus Torvalds continue; 33081da177e4SLinus Torvalds if ((err = inet6_fill_ifacaddr(skb, ifaca, 33091da177e4SLinus Torvalds NETLINK_CB(cb->skb).pid, 3310b6544c0bSJamal Hadi Salim cb->nlh->nlmsg_seq, RTM_GETANYCAST, 3311b6544c0bSJamal Hadi Salim NLM_F_MULTI)) <= 0) 33121da177e4SLinus Torvalds goto done; 33131da177e4SLinus Torvalds } 33141da177e4SLinus Torvalds break; 33151da177e4SLinus Torvalds default: 33161da177e4SLinus Torvalds break; 33171da177e4SLinus Torvalds } 33181da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 33191da177e4SLinus Torvalds in6_dev_put(idev); 33207562f876SPavel Emelianov cont: 33217562f876SPavel Emelianov idx++; 33221da177e4SLinus Torvalds } 33231da177e4SLinus Torvalds done: 33241da177e4SLinus Torvalds if (err <= 0) { 33251da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 33261da177e4SLinus Torvalds in6_dev_put(idev); 33271da177e4SLinus Torvalds } 33281da177e4SLinus Torvalds cb->args[0] = idx; 33291da177e4SLinus Torvalds cb->args[1] = ip_idx; 33301da177e4SLinus Torvalds return skb->len; 33311da177e4SLinus Torvalds } 33321da177e4SLinus Torvalds 33331da177e4SLinus Torvalds static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) 33341da177e4SLinus Torvalds { 33351da177e4SLinus Torvalds enum addr_type_t type = UNICAST_ADDR; 33361da177e4SLinus Torvalds return inet6_dump_addr(skb, cb, type); 33371da177e4SLinus Torvalds } 33381da177e4SLinus Torvalds 33391da177e4SLinus Torvalds static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) 33401da177e4SLinus Torvalds { 33411da177e4SLinus Torvalds enum addr_type_t type = MULTICAST_ADDR; 33421da177e4SLinus Torvalds return inet6_dump_addr(skb, cb, type); 33431da177e4SLinus Torvalds } 33441da177e4SLinus Torvalds 33451da177e4SLinus Torvalds 33461da177e4SLinus Torvalds static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) 33471da177e4SLinus Torvalds { 33481da177e4SLinus Torvalds enum addr_type_t type = ANYCAST_ADDR; 33491da177e4SLinus Torvalds return inet6_dump_addr(skb, cb, type); 33501da177e4SLinus Torvalds } 33511da177e4SLinus Torvalds 33521b29fc2cSThomas Graf static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh, 33531b29fc2cSThomas Graf void *arg) 33546c223828SNoriaki TAKAMIYA { 33551b29fc2cSThomas Graf struct ifaddrmsg *ifm; 33561b29fc2cSThomas Graf struct nlattr *tb[IFA_MAX+1]; 33576c223828SNoriaki TAKAMIYA struct in6_addr *addr = NULL; 33586c223828SNoriaki TAKAMIYA struct net_device *dev = NULL; 33596c223828SNoriaki TAKAMIYA struct inet6_ifaddr *ifa; 33606c223828SNoriaki TAKAMIYA struct sk_buff *skb; 33616c223828SNoriaki TAKAMIYA int err; 33626c223828SNoriaki TAKAMIYA 33631b29fc2cSThomas Graf err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); 33641b29fc2cSThomas Graf if (err < 0) 33651b29fc2cSThomas Graf goto errout; 33666c223828SNoriaki TAKAMIYA 33671b29fc2cSThomas Graf addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); 33681b29fc2cSThomas Graf if (addr == NULL) { 33691b29fc2cSThomas Graf err = -EINVAL; 33701b29fc2cSThomas Graf goto errout; 33711b29fc2cSThomas Graf } 33721b29fc2cSThomas Graf 33731b29fc2cSThomas Graf ifm = nlmsg_data(nlh); 33746c223828SNoriaki TAKAMIYA if (ifm->ifa_index) 3375881d966bSEric W. Biederman dev = __dev_get_by_index(&init_net, ifm->ifa_index); 33766c223828SNoriaki TAKAMIYA 33771b29fc2cSThomas Graf if ((ifa = ipv6_get_ifaddr(addr, dev, 1)) == NULL) { 33781b29fc2cSThomas Graf err = -EADDRNOTAVAIL; 33791b29fc2cSThomas Graf goto errout; 33806c223828SNoriaki TAKAMIYA } 33816c223828SNoriaki TAKAMIYA 33820ab6803bSThomas Graf if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) { 33831b29fc2cSThomas Graf err = -ENOBUFS; 33841b29fc2cSThomas Graf goto errout_ifa; 33851b29fc2cSThomas Graf } 33861b29fc2cSThomas Graf 33876c223828SNoriaki TAKAMIYA err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, 33886c223828SNoriaki TAKAMIYA nlh->nlmsg_seq, RTM_NEWADDR, 0); 338926932566SPatrick McHardy if (err < 0) { 339026932566SPatrick McHardy /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ 339126932566SPatrick McHardy WARN_ON(err == -EMSGSIZE); 339226932566SPatrick McHardy kfree_skb(skb); 339326932566SPatrick McHardy goto errout_ifa; 339426932566SPatrick McHardy } 33952942e900SThomas Graf err = rtnl_unicast(skb, NETLINK_CB(in_skb).pid); 33961b29fc2cSThomas Graf errout_ifa: 33976c223828SNoriaki TAKAMIYA in6_ifa_put(ifa); 33981b29fc2cSThomas Graf errout: 33996c223828SNoriaki TAKAMIYA return err; 34006c223828SNoriaki TAKAMIYA } 34016c223828SNoriaki TAKAMIYA 34021da177e4SLinus Torvalds static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) 34031da177e4SLinus Torvalds { 34041da177e4SLinus Torvalds struct sk_buff *skb; 34055d620266SThomas Graf int err = -ENOBUFS; 34061da177e4SLinus Torvalds 34070ab6803bSThomas Graf skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); 34085d620266SThomas Graf if (skb == NULL) 34095d620266SThomas Graf goto errout; 34105d620266SThomas Graf 34115d620266SThomas Graf err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); 341226932566SPatrick McHardy if (err < 0) { 341326932566SPatrick McHardy /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ 341426932566SPatrick McHardy WARN_ON(err == -EMSGSIZE); 341526932566SPatrick McHardy kfree_skb(skb); 341626932566SPatrick McHardy goto errout; 341726932566SPatrick McHardy } 34185d620266SThomas Graf err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); 34195d620266SThomas Graf errout: 34205d620266SThomas Graf if (err < 0) 34215d620266SThomas Graf rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err); 34221da177e4SLinus Torvalds } 34231da177e4SLinus Torvalds 3424b6f99a21SDave Jones static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, 34251da177e4SLinus Torvalds __s32 *array, int bytes) 34261da177e4SLinus Torvalds { 342704561c1fSThomas Graf BUG_ON(bytes < (DEVCONF_MAX * 4)); 342804561c1fSThomas Graf 34291da177e4SLinus Torvalds memset(array, 0, bytes); 34301da177e4SLinus Torvalds array[DEVCONF_FORWARDING] = cnf->forwarding; 34311da177e4SLinus Torvalds array[DEVCONF_HOPLIMIT] = cnf->hop_limit; 34321da177e4SLinus Torvalds array[DEVCONF_MTU6] = cnf->mtu6; 34331da177e4SLinus Torvalds array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; 34341da177e4SLinus Torvalds array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; 34351da177e4SLinus Torvalds array[DEVCONF_AUTOCONF] = cnf->autoconf; 34361da177e4SLinus Torvalds array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; 34371da177e4SLinus Torvalds array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; 34381da177e4SLinus Torvalds array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; 34391da177e4SLinus Torvalds array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; 34401da177e4SLinus Torvalds array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; 34411da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 34421da177e4SLinus Torvalds array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; 34431da177e4SLinus Torvalds array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; 34441da177e4SLinus Torvalds array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; 34451da177e4SLinus Torvalds array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; 34461da177e4SLinus Torvalds array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; 34471da177e4SLinus Torvalds #endif 34481da177e4SLinus Torvalds array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; 344965f5c7c1SYOSHIFUJI Hideaki array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; 3450c4fd30ebSYOSHIFUJI Hideaki array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; 3451930d6ff2SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_ROUTER_PREF 3452930d6ff2SYOSHIFUJI Hideaki array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; 345352e16356SYOSHIFUJI Hideaki array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval; 3454fa03ef38SNeil Horman #ifdef CONFIG_IPV6_ROUTE_INFO 345509c884d4SYOSHIFUJI Hideaki array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; 345609c884d4SYOSHIFUJI Hideaki #endif 3457930d6ff2SYOSHIFUJI Hideaki #endif 3458fbea49e1SYOSHIFUJI Hideaki array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; 34590bcbc926SYOSHIFUJI Hideaki array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; 346095c385b4SNeil Horman #ifdef CONFIG_IPV6_OPTIMISTIC_DAD 346195c385b4SNeil Horman array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; 346295c385b4SNeil Horman #endif 34631da177e4SLinus Torvalds } 34641da177e4SLinus Torvalds 3465339bf98fSThomas Graf static inline size_t inet6_if_nlmsg_size(void) 3466339bf98fSThomas Graf { 3467339bf98fSThomas Graf return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 3468339bf98fSThomas Graf + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 3469339bf98fSThomas Graf + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 3470339bf98fSThomas Graf + nla_total_size(4) /* IFLA_MTU */ 3471339bf98fSThomas Graf + nla_total_size(4) /* IFLA_LINK */ 3472339bf98fSThomas Graf + nla_total_size( /* IFLA_PROTINFO */ 3473339bf98fSThomas Graf nla_total_size(4) /* IFLA_INET6_FLAGS */ 3474339bf98fSThomas Graf + nla_total_size(sizeof(struct ifla_cacheinfo)) 3475339bf98fSThomas Graf + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ 3476bf99f1bdSYOSHIFUJI Hideaki + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ 3477bf99f1bdSYOSHIFUJI Hideaki + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ 3478339bf98fSThomas Graf ); 3479339bf98fSThomas Graf } 3480c5396a31SYOSHIFUJI Hideaki 34817f7d9a6bSHerbert Xu static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items, 34827f7d9a6bSHerbert Xu int bytes) 34837f7d9a6bSHerbert Xu { 34847f7d9a6bSHerbert Xu int i; 34857f7d9a6bSHerbert Xu int pad = bytes - sizeof(u64) * items; 34867f7d9a6bSHerbert Xu BUG_ON(pad < 0); 34877f7d9a6bSHerbert Xu 34887f7d9a6bSHerbert Xu /* Use put_unaligned() because stats may not be aligned for u64. */ 34897f7d9a6bSHerbert Xu put_unaligned(items, &stats[0]); 34907f7d9a6bSHerbert Xu for (i = 1; i < items; i++) 34917f7d9a6bSHerbert Xu put_unaligned(snmp_fold_field(mib, i), &stats[i]); 34927f7d9a6bSHerbert Xu 34937f7d9a6bSHerbert Xu memset(&stats[items], 0, pad); 34947f7d9a6bSHerbert Xu } 34957f7d9a6bSHerbert Xu 34967f7d9a6bSHerbert Xu static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, 34977f7d9a6bSHerbert Xu int bytes) 34987f7d9a6bSHerbert Xu { 34997f7d9a6bSHerbert Xu switch(attrtype) { 35007f7d9a6bSHerbert Xu case IFLA_INET6_STATS: 35017f7d9a6bSHerbert Xu __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes); 35027f7d9a6bSHerbert Xu break; 35037f7d9a6bSHerbert Xu case IFLA_INET6_ICMP6STATS: 35047f7d9a6bSHerbert Xu __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes); 35057f7d9a6bSHerbert Xu break; 35067f7d9a6bSHerbert Xu } 35077f7d9a6bSHerbert Xu } 35087f7d9a6bSHerbert Xu 35091da177e4SLinus Torvalds static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, 3510b6544c0bSJamal Hadi Salim u32 pid, u32 seq, int event, unsigned int flags) 35111da177e4SLinus Torvalds { 35121da177e4SLinus Torvalds struct net_device *dev = idev->dev; 3513bf99f1bdSYOSHIFUJI Hideaki struct nlattr *nla; 351404561c1fSThomas Graf struct ifinfomsg *hdr; 35151da177e4SLinus Torvalds struct nlmsghdr *nlh; 351604561c1fSThomas Graf void *protoinfo; 35171da177e4SLinus Torvalds struct ifla_cacheinfo ci; 35181da177e4SLinus Torvalds 351904561c1fSThomas Graf nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); 352004561c1fSThomas Graf if (nlh == NULL) 352126932566SPatrick McHardy return -EMSGSIZE; 35221da177e4SLinus Torvalds 352304561c1fSThomas Graf hdr = nlmsg_data(nlh); 352404561c1fSThomas Graf hdr->ifi_family = AF_INET6; 352504561c1fSThomas Graf hdr->__ifi_pad = 0; 352604561c1fSThomas Graf hdr->ifi_type = dev->type; 352704561c1fSThomas Graf hdr->ifi_index = dev->ifindex; 352804561c1fSThomas Graf hdr->ifi_flags = dev_get_flags(dev); 352904561c1fSThomas Graf hdr->ifi_change = 0; 353004561c1fSThomas Graf 353104561c1fSThomas Graf NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); 35321da177e4SLinus Torvalds 35331da177e4SLinus Torvalds if (dev->addr_len) 353404561c1fSThomas Graf NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); 35351da177e4SLinus Torvalds 353604561c1fSThomas Graf NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); 35371da177e4SLinus Torvalds if (dev->ifindex != dev->iflink) 353804561c1fSThomas Graf NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); 35391da177e4SLinus Torvalds 354004561c1fSThomas Graf protoinfo = nla_nest_start(skb, IFLA_PROTINFO); 354104561c1fSThomas Graf if (protoinfo == NULL) 354204561c1fSThomas Graf goto nla_put_failure; 35431da177e4SLinus Torvalds 354404561c1fSThomas Graf NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags); 35451da177e4SLinus Torvalds 35461da177e4SLinus Torvalds ci.max_reasm_len = IPV6_MAXPLEN; 35471da177e4SLinus Torvalds ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 35481da177e4SLinus Torvalds + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); 35491da177e4SLinus Torvalds ci.reachable_time = idev->nd_parms->reachable_time; 35501da177e4SLinus Torvalds ci.retrans_time = idev->nd_parms->retrans_time; 355104561c1fSThomas Graf NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); 35521da177e4SLinus Torvalds 3553bf99f1bdSYOSHIFUJI Hideaki nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); 3554bf99f1bdSYOSHIFUJI Hideaki if (nla == NULL) 355504561c1fSThomas Graf goto nla_put_failure; 3556bf99f1bdSYOSHIFUJI Hideaki ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); 35571da177e4SLinus Torvalds 3558bf99f1bdSYOSHIFUJI Hideaki /* XXX - MC not implemented */ 3559bf99f1bdSYOSHIFUJI Hideaki 3560bf99f1bdSYOSHIFUJI Hideaki nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); 3561bf99f1bdSYOSHIFUJI Hideaki if (nla == NULL) 3562bf99f1bdSYOSHIFUJI Hideaki goto nla_put_failure; 3563bf99f1bdSYOSHIFUJI Hideaki snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); 3564bf99f1bdSYOSHIFUJI Hideaki 3565bf99f1bdSYOSHIFUJI Hideaki nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); 3566bf99f1bdSYOSHIFUJI Hideaki if (nla == NULL) 3567bf99f1bdSYOSHIFUJI Hideaki goto nla_put_failure; 3568bf99f1bdSYOSHIFUJI Hideaki snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); 35691da177e4SLinus Torvalds 357004561c1fSThomas Graf nla_nest_end(skb, protoinfo); 357104561c1fSThomas Graf return nlmsg_end(skb, nlh); 35721da177e4SLinus Torvalds 357304561c1fSThomas Graf nla_put_failure: 357426932566SPatrick McHardy nlmsg_cancel(skb, nlh); 357526932566SPatrick McHardy return -EMSGSIZE; 35761da177e4SLinus Torvalds } 35771da177e4SLinus Torvalds 35781da177e4SLinus Torvalds static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) 35791da177e4SLinus Torvalds { 35801da177e4SLinus Torvalds int idx, err; 35811da177e4SLinus Torvalds int s_idx = cb->args[0]; 35821da177e4SLinus Torvalds struct net_device *dev; 35831da177e4SLinus Torvalds struct inet6_dev *idev; 35841da177e4SLinus Torvalds 35851da177e4SLinus Torvalds read_lock(&dev_base_lock); 35867562f876SPavel Emelianov idx = 0; 3587881d966bSEric W. Biederman for_each_netdev(&init_net, dev) { 35881da177e4SLinus Torvalds if (idx < s_idx) 35897562f876SPavel Emelianov goto cont; 35901da177e4SLinus Torvalds if ((idev = in6_dev_get(dev)) == NULL) 35917562f876SPavel Emelianov goto cont; 35921da177e4SLinus Torvalds err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid, 3593b6544c0bSJamal Hadi Salim cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI); 35941da177e4SLinus Torvalds in6_dev_put(idev); 35951da177e4SLinus Torvalds if (err <= 0) 35961da177e4SLinus Torvalds break; 35977562f876SPavel Emelianov cont: 35987562f876SPavel Emelianov idx++; 35991da177e4SLinus Torvalds } 36001da177e4SLinus Torvalds read_unlock(&dev_base_lock); 36011da177e4SLinus Torvalds cb->args[0] = idx; 36021da177e4SLinus Torvalds 36031da177e4SLinus Torvalds return skb->len; 36041da177e4SLinus Torvalds } 36051da177e4SLinus Torvalds 36061da177e4SLinus Torvalds void inet6_ifinfo_notify(int event, struct inet6_dev *idev) 36071da177e4SLinus Torvalds { 36081da177e4SLinus Torvalds struct sk_buff *skb; 36098d7a76c9SThomas Graf int err = -ENOBUFS; 36101da177e4SLinus Torvalds 3611339bf98fSThomas Graf skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); 36128d7a76c9SThomas Graf if (skb == NULL) 36138d7a76c9SThomas Graf goto errout; 36148d7a76c9SThomas Graf 36158d7a76c9SThomas Graf err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); 361626932566SPatrick McHardy if (err < 0) { 361726932566SPatrick McHardy /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ 361826932566SPatrick McHardy WARN_ON(err == -EMSGSIZE); 361926932566SPatrick McHardy kfree_skb(skb); 362026932566SPatrick McHardy goto errout; 362126932566SPatrick McHardy } 36228d7a76c9SThomas Graf err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); 36238d7a76c9SThomas Graf errout: 36248d7a76c9SThomas Graf if (err < 0) 36258d7a76c9SThomas Graf rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err); 36261da177e4SLinus Torvalds } 36271da177e4SLinus Torvalds 3628339bf98fSThomas Graf static inline size_t inet6_prefix_nlmsg_size(void) 3629339bf98fSThomas Graf { 3630339bf98fSThomas Graf return NLMSG_ALIGN(sizeof(struct prefixmsg)) 3631339bf98fSThomas Graf + nla_total_size(sizeof(struct in6_addr)) 3632339bf98fSThomas Graf + nla_total_size(sizeof(struct prefix_cacheinfo)); 3633339bf98fSThomas Graf } 3634c5396a31SYOSHIFUJI Hideaki 36351da177e4SLinus Torvalds static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, 3636b6544c0bSJamal Hadi Salim struct prefix_info *pinfo, u32 pid, u32 seq, 3637b6544c0bSJamal Hadi Salim int event, unsigned int flags) 36381da177e4SLinus Torvalds { 36391da177e4SLinus Torvalds struct prefixmsg *pmsg; 36401da177e4SLinus Torvalds struct nlmsghdr *nlh; 36411da177e4SLinus Torvalds struct prefix_cacheinfo ci; 36421da177e4SLinus Torvalds 36436051e2f4SThomas Graf nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags); 36446051e2f4SThomas Graf if (nlh == NULL) 364526932566SPatrick McHardy return -EMSGSIZE; 36466051e2f4SThomas Graf 36476051e2f4SThomas Graf pmsg = nlmsg_data(nlh); 36481da177e4SLinus Torvalds pmsg->prefix_family = AF_INET6; 36498a47077aSPatrick McHardy pmsg->prefix_pad1 = 0; 36508a47077aSPatrick McHardy pmsg->prefix_pad2 = 0; 36511da177e4SLinus Torvalds pmsg->prefix_ifindex = idev->dev->ifindex; 36521da177e4SLinus Torvalds pmsg->prefix_len = pinfo->prefix_len; 36531da177e4SLinus Torvalds pmsg->prefix_type = pinfo->type; 36548a47077aSPatrick McHardy pmsg->prefix_pad3 = 0; 36551da177e4SLinus Torvalds pmsg->prefix_flags = 0; 36561da177e4SLinus Torvalds if (pinfo->onlink) 36571da177e4SLinus Torvalds pmsg->prefix_flags |= IF_PREFIX_ONLINK; 36581da177e4SLinus Torvalds if (pinfo->autoconf) 36591da177e4SLinus Torvalds pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; 36601da177e4SLinus Torvalds 36616051e2f4SThomas Graf NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); 36621da177e4SLinus Torvalds 36631da177e4SLinus Torvalds ci.preferred_time = ntohl(pinfo->prefered); 36641da177e4SLinus Torvalds ci.valid_time = ntohl(pinfo->valid); 36656051e2f4SThomas Graf NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); 36661da177e4SLinus Torvalds 36676051e2f4SThomas Graf return nlmsg_end(skb, nlh); 36681da177e4SLinus Torvalds 36696051e2f4SThomas Graf nla_put_failure: 367026932566SPatrick McHardy nlmsg_cancel(skb, nlh); 367126932566SPatrick McHardy return -EMSGSIZE; 36721da177e4SLinus Torvalds } 36731da177e4SLinus Torvalds 36741da177e4SLinus Torvalds static void inet6_prefix_notify(int event, struct inet6_dev *idev, 36751da177e4SLinus Torvalds struct prefix_info *pinfo) 36761da177e4SLinus Torvalds { 36771da177e4SLinus Torvalds struct sk_buff *skb; 36788c384bfaSThomas Graf int err = -ENOBUFS; 36791da177e4SLinus Torvalds 3680339bf98fSThomas Graf skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); 36818c384bfaSThomas Graf if (skb == NULL) 36828c384bfaSThomas Graf goto errout; 36838c384bfaSThomas Graf 36848c384bfaSThomas Graf err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); 368526932566SPatrick McHardy if (err < 0) { 368626932566SPatrick McHardy /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ 368726932566SPatrick McHardy WARN_ON(err == -EMSGSIZE); 368826932566SPatrick McHardy kfree_skb(skb); 368926932566SPatrick McHardy goto errout; 369026932566SPatrick McHardy } 36918c384bfaSThomas Graf err = rtnl_notify(skb, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); 36928c384bfaSThomas Graf errout: 36938c384bfaSThomas Graf if (err < 0) 36948c384bfaSThomas Graf rtnl_set_sk_err(RTNLGRP_IPV6_PREFIX, err); 36951da177e4SLinus Torvalds } 36961da177e4SLinus Torvalds 36971da177e4SLinus Torvalds static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) 36981da177e4SLinus Torvalds { 36991da177e4SLinus Torvalds inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); 37001da177e4SLinus Torvalds 37011da177e4SLinus Torvalds switch (event) { 37021da177e4SLinus Torvalds case RTM_NEWADDR: 370395c385b4SNeil Horman /* 370495c385b4SNeil Horman * If the address was optimistic 370595c385b4SNeil Horman * we inserted the route at the start of 370695c385b4SNeil Horman * our DAD process, so we don't need 370795c385b4SNeil Horman * to do it again 370895c385b4SNeil Horman */ 370995c385b4SNeil Horman if (!(ifp->rt->rt6i_node)) 371040e22e8fSThomas Graf ip6_ins_rt(ifp->rt); 37111da177e4SLinus Torvalds if (ifp->idev->cnf.forwarding) 37121da177e4SLinus Torvalds addrconf_join_anycast(ifp); 37131da177e4SLinus Torvalds break; 37141da177e4SLinus Torvalds case RTM_DELADDR: 37151da177e4SLinus Torvalds if (ifp->idev->cnf.forwarding) 37161da177e4SLinus Torvalds addrconf_leave_anycast(ifp); 37171da177e4SLinus Torvalds addrconf_leave_solict(ifp->idev, &ifp->addr); 37181da177e4SLinus Torvalds dst_hold(&ifp->rt->u.dst); 3719e0a1ad73SThomas Graf if (ip6_del_rt(ifp->rt)) 37201da177e4SLinus Torvalds dst_free(&ifp->rt->u.dst); 37211da177e4SLinus Torvalds break; 37221da177e4SLinus Torvalds } 37231da177e4SLinus Torvalds } 37241da177e4SLinus Torvalds 37251da177e4SLinus Torvalds static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) 37261da177e4SLinus Torvalds { 37278814c4b5SYOSHIFUJI Hideaki rcu_read_lock_bh(); 37281da177e4SLinus Torvalds if (likely(ifp->idev->dead == 0)) 37291da177e4SLinus Torvalds __ipv6_ifa_notify(event, ifp); 37308814c4b5SYOSHIFUJI Hideaki rcu_read_unlock_bh(); 37311da177e4SLinus Torvalds } 37321da177e4SLinus Torvalds 37331da177e4SLinus Torvalds #ifdef CONFIG_SYSCTL 37341da177e4SLinus Torvalds 37351da177e4SLinus Torvalds static 37361da177e4SLinus Torvalds int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp, 37371da177e4SLinus Torvalds void __user *buffer, size_t *lenp, loff_t *ppos) 37381da177e4SLinus Torvalds { 37391da177e4SLinus Torvalds int *valp = ctl->data; 37401da177e4SLinus Torvalds int val = *valp; 37411da177e4SLinus Torvalds int ret; 37421da177e4SLinus Torvalds 37431da177e4SLinus Torvalds ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); 37441da177e4SLinus Torvalds 37451da177e4SLinus Torvalds if (write && valp != &ipv6_devconf_dflt.forwarding) { 37461da177e4SLinus Torvalds if (valp != &ipv6_devconf.forwarding) { 37471da177e4SLinus Torvalds if ((!*valp) ^ (!val)) { 37481da177e4SLinus Torvalds struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1; 37491da177e4SLinus Torvalds if (idev == NULL) 37501da177e4SLinus Torvalds return ret; 37511da177e4SLinus Torvalds dev_forward_change(idev); 37521da177e4SLinus Torvalds } 37531da177e4SLinus Torvalds } else { 37541da177e4SLinus Torvalds ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding; 37551da177e4SLinus Torvalds addrconf_forward_change(); 37561da177e4SLinus Torvalds } 37571da177e4SLinus Torvalds if (*valp) 37581da177e4SLinus Torvalds rt6_purge_dflt_routers(); 37591da177e4SLinus Torvalds } 37601da177e4SLinus Torvalds 37611da177e4SLinus Torvalds return ret; 37621da177e4SLinus Torvalds } 37631da177e4SLinus Torvalds 37641da177e4SLinus Torvalds static int addrconf_sysctl_forward_strategy(ctl_table *table, 37651da177e4SLinus Torvalds int __user *name, int nlen, 37661da177e4SLinus Torvalds void __user *oldval, 37671da177e4SLinus Torvalds size_t __user *oldlenp, 37681f29bcd7SAlexey Dobriyan void __user *newval, size_t newlen) 37691da177e4SLinus Torvalds { 37701da177e4SLinus Torvalds int *valp = table->data; 37711da177e4SLinus Torvalds int new; 37721da177e4SLinus Torvalds 37731da177e4SLinus Torvalds if (!newval || !newlen) 37741da177e4SLinus Torvalds return 0; 37751da177e4SLinus Torvalds if (newlen != sizeof(int)) 37761da177e4SLinus Torvalds return -EINVAL; 37771da177e4SLinus Torvalds if (get_user(new, (int __user *)newval)) 37781da177e4SLinus Torvalds return -EFAULT; 37791da177e4SLinus Torvalds if (new == *valp) 37801da177e4SLinus Torvalds return 0; 37811da177e4SLinus Torvalds if (oldval && oldlenp) { 37821da177e4SLinus Torvalds size_t len; 37831da177e4SLinus Torvalds if (get_user(len, oldlenp)) 37841da177e4SLinus Torvalds return -EFAULT; 37851da177e4SLinus Torvalds if (len) { 37861da177e4SLinus Torvalds if (len > table->maxlen) 37871da177e4SLinus Torvalds len = table->maxlen; 37881da177e4SLinus Torvalds if (copy_to_user(oldval, valp, len)) 37891da177e4SLinus Torvalds return -EFAULT; 37901da177e4SLinus Torvalds if (put_user(len, oldlenp)) 37911da177e4SLinus Torvalds return -EFAULT; 37921da177e4SLinus Torvalds } 37931da177e4SLinus Torvalds } 37941da177e4SLinus Torvalds 37951da177e4SLinus Torvalds if (valp != &ipv6_devconf_dflt.forwarding) { 37961da177e4SLinus Torvalds if (valp != &ipv6_devconf.forwarding) { 37971da177e4SLinus Torvalds struct inet6_dev *idev = (struct inet6_dev *)table->extra1; 37981da177e4SLinus Torvalds int changed; 37991da177e4SLinus Torvalds if (unlikely(idev == NULL)) 38001da177e4SLinus Torvalds return -ENODEV; 38011da177e4SLinus Torvalds changed = (!*valp) ^ (!new); 38021da177e4SLinus Torvalds *valp = new; 38031da177e4SLinus Torvalds if (changed) 38041da177e4SLinus Torvalds dev_forward_change(idev); 38051da177e4SLinus Torvalds } else { 38061da177e4SLinus Torvalds *valp = new; 38071da177e4SLinus Torvalds addrconf_forward_change(); 38081da177e4SLinus Torvalds } 38091da177e4SLinus Torvalds 38101da177e4SLinus Torvalds if (*valp) 38111da177e4SLinus Torvalds rt6_purge_dflt_routers(); 38121da177e4SLinus Torvalds } else 38131da177e4SLinus Torvalds *valp = new; 38141da177e4SLinus Torvalds 38151da177e4SLinus Torvalds return 1; 38161da177e4SLinus Torvalds } 38171da177e4SLinus Torvalds 38181da177e4SLinus Torvalds static struct addrconf_sysctl_table 38191da177e4SLinus Torvalds { 38201da177e4SLinus Torvalds struct ctl_table_header *sysctl_header; 38211da177e4SLinus Torvalds ctl_table addrconf_vars[__NET_IPV6_MAX]; 38221da177e4SLinus Torvalds ctl_table addrconf_dev[2]; 38231da177e4SLinus Torvalds ctl_table addrconf_conf_dir[2]; 38241da177e4SLinus Torvalds ctl_table addrconf_proto_dir[2]; 38251da177e4SLinus Torvalds ctl_table addrconf_root_dir[2]; 3826ab32ea5dSBrian Haley } addrconf_sysctl __read_mostly = { 38271da177e4SLinus Torvalds .sysctl_header = NULL, 38281da177e4SLinus Torvalds .addrconf_vars = { 38291da177e4SLinus Torvalds { 38301da177e4SLinus Torvalds .ctl_name = NET_IPV6_FORWARDING, 38311da177e4SLinus Torvalds .procname = "forwarding", 38321da177e4SLinus Torvalds .data = &ipv6_devconf.forwarding, 38331da177e4SLinus Torvalds .maxlen = sizeof(int), 38341da177e4SLinus Torvalds .mode = 0644, 38351da177e4SLinus Torvalds .proc_handler = &addrconf_sysctl_forward, 38361da177e4SLinus Torvalds .strategy = &addrconf_sysctl_forward_strategy, 38371da177e4SLinus Torvalds }, 38381da177e4SLinus Torvalds { 38391da177e4SLinus Torvalds .ctl_name = NET_IPV6_HOP_LIMIT, 38401da177e4SLinus Torvalds .procname = "hop_limit", 38411da177e4SLinus Torvalds .data = &ipv6_devconf.hop_limit, 38421da177e4SLinus Torvalds .maxlen = sizeof(int), 38431da177e4SLinus Torvalds .mode = 0644, 38441da177e4SLinus Torvalds .proc_handler = proc_dointvec, 38451da177e4SLinus Torvalds }, 38461da177e4SLinus Torvalds { 38471da177e4SLinus Torvalds .ctl_name = NET_IPV6_MTU, 38481da177e4SLinus Torvalds .procname = "mtu", 38491da177e4SLinus Torvalds .data = &ipv6_devconf.mtu6, 38501da177e4SLinus Torvalds .maxlen = sizeof(int), 38511da177e4SLinus Torvalds .mode = 0644, 38521da177e4SLinus Torvalds .proc_handler = &proc_dointvec, 38531da177e4SLinus Torvalds }, 38541da177e4SLinus Torvalds { 38551da177e4SLinus Torvalds .ctl_name = NET_IPV6_ACCEPT_RA, 38561da177e4SLinus Torvalds .procname = "accept_ra", 38571da177e4SLinus Torvalds .data = &ipv6_devconf.accept_ra, 38581da177e4SLinus Torvalds .maxlen = sizeof(int), 38591da177e4SLinus Torvalds .mode = 0644, 38601da177e4SLinus Torvalds .proc_handler = &proc_dointvec, 38611da177e4SLinus Torvalds }, 38621da177e4SLinus Torvalds { 38631da177e4SLinus Torvalds .ctl_name = NET_IPV6_ACCEPT_REDIRECTS, 38641da177e4SLinus Torvalds .procname = "accept_redirects", 38651da177e4SLinus Torvalds .data = &ipv6_devconf.accept_redirects, 38661da177e4SLinus Torvalds .maxlen = sizeof(int), 38671da177e4SLinus Torvalds .mode = 0644, 38681da177e4SLinus Torvalds .proc_handler = &proc_dointvec, 38691da177e4SLinus Torvalds }, 38701da177e4SLinus Torvalds { 38711da177e4SLinus Torvalds .ctl_name = NET_IPV6_AUTOCONF, 38721da177e4SLinus Torvalds .procname = "autoconf", 38731da177e4SLinus Torvalds .data = &ipv6_devconf.autoconf, 38741da177e4SLinus Torvalds .maxlen = sizeof(int), 38751da177e4SLinus Torvalds .mode = 0644, 38761da177e4SLinus Torvalds .proc_handler = &proc_dointvec, 38771da177e4SLinus Torvalds }, 38781da177e4SLinus Torvalds { 38791da177e4SLinus Torvalds .ctl_name = NET_IPV6_DAD_TRANSMITS, 38801da177e4SLinus Torvalds .procname = "dad_transmits", 38811da177e4SLinus Torvalds .data = &ipv6_devconf.dad_transmits, 38821da177e4SLinus Torvalds .maxlen = sizeof(int), 38831da177e4SLinus Torvalds .mode = 0644, 38841da177e4SLinus Torvalds .proc_handler = &proc_dointvec, 38851da177e4SLinus Torvalds }, 38861da177e4SLinus Torvalds { 38871da177e4SLinus Torvalds .ctl_name = NET_IPV6_RTR_SOLICITS, 38881da177e4SLinus Torvalds .procname = "router_solicitations", 38891da177e4SLinus Torvalds .data = &ipv6_devconf.rtr_solicits, 38901da177e4SLinus Torvalds .maxlen = sizeof(int), 38911da177e4SLinus Torvalds .mode = 0644, 38921da177e4SLinus Torvalds .proc_handler = &proc_dointvec, 38931da177e4SLinus Torvalds }, 38941da177e4SLinus Torvalds { 38951da177e4SLinus Torvalds .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL, 38961da177e4SLinus Torvalds .procname = "router_solicitation_interval", 38971da177e4SLinus Torvalds .data = &ipv6_devconf.rtr_solicit_interval, 38981da177e4SLinus Torvalds .maxlen = sizeof(int), 38991da177e4SLinus Torvalds .mode = 0644, 39001da177e4SLinus Torvalds .proc_handler = &proc_dointvec_jiffies, 39011da177e4SLinus Torvalds .strategy = &sysctl_jiffies, 39021da177e4SLinus Torvalds }, 39031da177e4SLinus Torvalds { 39041da177e4SLinus Torvalds .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY, 39051da177e4SLinus Torvalds .procname = "router_solicitation_delay", 39061da177e4SLinus Torvalds .data = &ipv6_devconf.rtr_solicit_delay, 39071da177e4SLinus Torvalds .maxlen = sizeof(int), 39081da177e4SLinus Torvalds .mode = 0644, 39091da177e4SLinus Torvalds .proc_handler = &proc_dointvec_jiffies, 39101da177e4SLinus Torvalds .strategy = &sysctl_jiffies, 39111da177e4SLinus Torvalds }, 39121da177e4SLinus Torvalds { 39131da177e4SLinus Torvalds .ctl_name = NET_IPV6_FORCE_MLD_VERSION, 39141da177e4SLinus Torvalds .procname = "force_mld_version", 39151da177e4SLinus Torvalds .data = &ipv6_devconf.force_mld_version, 39161da177e4SLinus Torvalds .maxlen = sizeof(int), 39171da177e4SLinus Torvalds .mode = 0644, 39181da177e4SLinus Torvalds .proc_handler = &proc_dointvec, 39191da177e4SLinus Torvalds }, 39201da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 39211da177e4SLinus Torvalds { 39221da177e4SLinus Torvalds .ctl_name = NET_IPV6_USE_TEMPADDR, 39231da177e4SLinus Torvalds .procname = "use_tempaddr", 39241da177e4SLinus Torvalds .data = &ipv6_devconf.use_tempaddr, 39251da177e4SLinus Torvalds .maxlen = sizeof(int), 39261da177e4SLinus Torvalds .mode = 0644, 39271da177e4SLinus Torvalds .proc_handler = &proc_dointvec, 39281da177e4SLinus Torvalds }, 39291da177e4SLinus Torvalds { 39301da177e4SLinus Torvalds .ctl_name = NET_IPV6_TEMP_VALID_LFT, 39311da177e4SLinus Torvalds .procname = "temp_valid_lft", 39321da177e4SLinus Torvalds .data = &ipv6_devconf.temp_valid_lft, 39331da177e4SLinus Torvalds .maxlen = sizeof(int), 39341da177e4SLinus Torvalds .mode = 0644, 39351da177e4SLinus Torvalds .proc_handler = &proc_dointvec, 39361da177e4SLinus Torvalds }, 39371da177e4SLinus Torvalds { 39381da177e4SLinus Torvalds .ctl_name = NET_IPV6_TEMP_PREFERED_LFT, 39391da177e4SLinus Torvalds .procname = "temp_prefered_lft", 39401da177e4SLinus Torvalds .data = &ipv6_devconf.temp_prefered_lft, 39411da177e4SLinus Torvalds .maxlen = sizeof(int), 39421da177e4SLinus Torvalds .mode = 0644, 39431da177e4SLinus Torvalds .proc_handler = &proc_dointvec, 39441da177e4SLinus Torvalds }, 39451da177e4SLinus Torvalds { 39461da177e4SLinus Torvalds .ctl_name = NET_IPV6_REGEN_MAX_RETRY, 39471da177e4SLinus Torvalds .procname = "regen_max_retry", 39481da177e4SLinus Torvalds .data = &ipv6_devconf.regen_max_retry, 39491da177e4SLinus Torvalds .maxlen = sizeof(int), 39501da177e4SLinus Torvalds .mode = 0644, 39511da177e4SLinus Torvalds .proc_handler = &proc_dointvec, 39521da177e4SLinus Torvalds }, 39531da177e4SLinus Torvalds { 39541da177e4SLinus Torvalds .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR, 39551da177e4SLinus Torvalds .procname = "max_desync_factor", 39561da177e4SLinus Torvalds .data = &ipv6_devconf.max_desync_factor, 39571da177e4SLinus Torvalds .maxlen = sizeof(int), 39581da177e4SLinus Torvalds .mode = 0644, 39591da177e4SLinus Torvalds .proc_handler = &proc_dointvec, 39601da177e4SLinus Torvalds }, 39611da177e4SLinus Torvalds #endif 39621da177e4SLinus Torvalds { 39631da177e4SLinus Torvalds .ctl_name = NET_IPV6_MAX_ADDRESSES, 39641da177e4SLinus Torvalds .procname = "max_addresses", 39651da177e4SLinus Torvalds .data = &ipv6_devconf.max_addresses, 39661da177e4SLinus Torvalds .maxlen = sizeof(int), 39671da177e4SLinus Torvalds .mode = 0644, 39681da177e4SLinus Torvalds .proc_handler = &proc_dointvec, 39691da177e4SLinus Torvalds }, 39701da177e4SLinus Torvalds { 397165f5c7c1SYOSHIFUJI Hideaki .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR, 397265f5c7c1SYOSHIFUJI Hideaki .procname = "accept_ra_defrtr", 397365f5c7c1SYOSHIFUJI Hideaki .data = &ipv6_devconf.accept_ra_defrtr, 397465f5c7c1SYOSHIFUJI Hideaki .maxlen = sizeof(int), 397565f5c7c1SYOSHIFUJI Hideaki .mode = 0644, 397665f5c7c1SYOSHIFUJI Hideaki .proc_handler = &proc_dointvec, 397765f5c7c1SYOSHIFUJI Hideaki }, 397865f5c7c1SYOSHIFUJI Hideaki { 3979c4fd30ebSYOSHIFUJI Hideaki .ctl_name = NET_IPV6_ACCEPT_RA_PINFO, 3980c4fd30ebSYOSHIFUJI Hideaki .procname = "accept_ra_pinfo", 3981c4fd30ebSYOSHIFUJI Hideaki .data = &ipv6_devconf.accept_ra_pinfo, 3982c4fd30ebSYOSHIFUJI Hideaki .maxlen = sizeof(int), 3983c4fd30ebSYOSHIFUJI Hideaki .mode = 0644, 3984c4fd30ebSYOSHIFUJI Hideaki .proc_handler = &proc_dointvec, 3985c4fd30ebSYOSHIFUJI Hideaki }, 3986930d6ff2SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_ROUTER_PREF 3987930d6ff2SYOSHIFUJI Hideaki { 3988930d6ff2SYOSHIFUJI Hideaki .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF, 3989930d6ff2SYOSHIFUJI Hideaki .procname = "accept_ra_rtr_pref", 3990930d6ff2SYOSHIFUJI Hideaki .data = &ipv6_devconf.accept_ra_rtr_pref, 3991930d6ff2SYOSHIFUJI Hideaki .maxlen = sizeof(int), 3992930d6ff2SYOSHIFUJI Hideaki .mode = 0644, 3993930d6ff2SYOSHIFUJI Hideaki .proc_handler = &proc_dointvec, 3994930d6ff2SYOSHIFUJI Hideaki }, 399552e16356SYOSHIFUJI Hideaki { 399652e16356SYOSHIFUJI Hideaki .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL, 399752e16356SYOSHIFUJI Hideaki .procname = "router_probe_interval", 399852e16356SYOSHIFUJI Hideaki .data = &ipv6_devconf.rtr_probe_interval, 399952e16356SYOSHIFUJI Hideaki .maxlen = sizeof(int), 400052e16356SYOSHIFUJI Hideaki .mode = 0644, 400152e16356SYOSHIFUJI Hideaki .proc_handler = &proc_dointvec_jiffies, 400252e16356SYOSHIFUJI Hideaki .strategy = &sysctl_jiffies, 400352e16356SYOSHIFUJI Hideaki }, 4004fa03ef38SNeil Horman #ifdef CONFIG_IPV6_ROUTE_INFO 400509c884d4SYOSHIFUJI Hideaki { 400609c884d4SYOSHIFUJI Hideaki .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN, 400709c884d4SYOSHIFUJI Hideaki .procname = "accept_ra_rt_info_max_plen", 400809c884d4SYOSHIFUJI Hideaki .data = &ipv6_devconf.accept_ra_rt_info_max_plen, 400909c884d4SYOSHIFUJI Hideaki .maxlen = sizeof(int), 401009c884d4SYOSHIFUJI Hideaki .mode = 0644, 401109c884d4SYOSHIFUJI Hideaki .proc_handler = &proc_dointvec, 401209c884d4SYOSHIFUJI Hideaki }, 401309c884d4SYOSHIFUJI Hideaki #endif 4014930d6ff2SYOSHIFUJI Hideaki #endif 4015c4fd30ebSYOSHIFUJI Hideaki { 4016fbea49e1SYOSHIFUJI Hideaki .ctl_name = NET_IPV6_PROXY_NDP, 4017fbea49e1SYOSHIFUJI Hideaki .procname = "proxy_ndp", 4018fbea49e1SYOSHIFUJI Hideaki .data = &ipv6_devconf.proxy_ndp, 4019fbea49e1SYOSHIFUJI Hideaki .maxlen = sizeof(int), 4020fbea49e1SYOSHIFUJI Hideaki .mode = 0644, 4021fbea49e1SYOSHIFUJI Hideaki .proc_handler = &proc_dointvec, 4022fbea49e1SYOSHIFUJI Hideaki }, 4023fbea49e1SYOSHIFUJI Hideaki { 40240bcbc926SYOSHIFUJI Hideaki .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE, 40250bcbc926SYOSHIFUJI Hideaki .procname = "accept_source_route", 40260bcbc926SYOSHIFUJI Hideaki .data = &ipv6_devconf.accept_source_route, 40270bcbc926SYOSHIFUJI Hideaki .maxlen = sizeof(int), 40280bcbc926SYOSHIFUJI Hideaki .mode = 0644, 40290bcbc926SYOSHIFUJI Hideaki .proc_handler = &proc_dointvec, 40300bcbc926SYOSHIFUJI Hideaki }, 403195c385b4SNeil Horman #ifdef CONFIG_IPV6_OPTIMISTIC_DAD 403295c385b4SNeil Horman { 403395c385b4SNeil Horman .ctl_name = CTL_UNNUMBERED, 403495c385b4SNeil Horman .procname = "optimistic_dad", 403595c385b4SNeil Horman .data = &ipv6_devconf.optimistic_dad, 403695c385b4SNeil Horman .maxlen = sizeof(int), 403795c385b4SNeil Horman .mode = 0644, 403895c385b4SNeil Horman .proc_handler = &proc_dointvec, 403995c385b4SNeil Horman 404095c385b4SNeil Horman }, 404195c385b4SNeil Horman #endif 40420bcbc926SYOSHIFUJI Hideaki { 40431da177e4SLinus Torvalds .ctl_name = 0, /* sentinel */ 40441da177e4SLinus Torvalds } 40451da177e4SLinus Torvalds }, 40461da177e4SLinus Torvalds .addrconf_dev = { 40471da177e4SLinus Torvalds { 40481da177e4SLinus Torvalds .ctl_name = NET_PROTO_CONF_ALL, 40491da177e4SLinus Torvalds .procname = "all", 40501da177e4SLinus Torvalds .mode = 0555, 40511da177e4SLinus Torvalds .child = addrconf_sysctl.addrconf_vars, 40521da177e4SLinus Torvalds }, 40531da177e4SLinus Torvalds { 40541da177e4SLinus Torvalds .ctl_name = 0, /* sentinel */ 40551da177e4SLinus Torvalds } 40561da177e4SLinus Torvalds }, 40571da177e4SLinus Torvalds .addrconf_conf_dir = { 40581da177e4SLinus Torvalds { 40591da177e4SLinus Torvalds .ctl_name = NET_IPV6_CONF, 40601da177e4SLinus Torvalds .procname = "conf", 40611da177e4SLinus Torvalds .mode = 0555, 40621da177e4SLinus Torvalds .child = addrconf_sysctl.addrconf_dev, 40631da177e4SLinus Torvalds }, 40641da177e4SLinus Torvalds { 40651da177e4SLinus Torvalds .ctl_name = 0, /* sentinel */ 40661da177e4SLinus Torvalds } 40671da177e4SLinus Torvalds }, 40681da177e4SLinus Torvalds .addrconf_proto_dir = { 40691da177e4SLinus Torvalds { 40701da177e4SLinus Torvalds .ctl_name = NET_IPV6, 40711da177e4SLinus Torvalds .procname = "ipv6", 40721da177e4SLinus Torvalds .mode = 0555, 40731da177e4SLinus Torvalds .child = addrconf_sysctl.addrconf_conf_dir, 40741da177e4SLinus Torvalds }, 40751da177e4SLinus Torvalds { 40761da177e4SLinus Torvalds .ctl_name = 0, /* sentinel */ 40771da177e4SLinus Torvalds } 40781da177e4SLinus Torvalds }, 40791da177e4SLinus Torvalds .addrconf_root_dir = { 40801da177e4SLinus Torvalds { 40811da177e4SLinus Torvalds .ctl_name = CTL_NET, 40821da177e4SLinus Torvalds .procname = "net", 40831da177e4SLinus Torvalds .mode = 0555, 40841da177e4SLinus Torvalds .child = addrconf_sysctl.addrconf_proto_dir, 40851da177e4SLinus Torvalds }, 40861da177e4SLinus Torvalds { 40871da177e4SLinus Torvalds .ctl_name = 0, /* sentinel */ 40881da177e4SLinus Torvalds } 40891da177e4SLinus Torvalds }, 40901da177e4SLinus Torvalds }; 40911da177e4SLinus Torvalds 40921da177e4SLinus Torvalds static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p) 40931da177e4SLinus Torvalds { 40941da177e4SLinus Torvalds int i; 40951da177e4SLinus Torvalds struct net_device *dev = idev ? idev->dev : NULL; 40961da177e4SLinus Torvalds struct addrconf_sysctl_table *t; 40971da177e4SLinus Torvalds char *dev_name = NULL; 40981da177e4SLinus Torvalds 4099af879cc7SArnaldo Carvalho de Melo t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); 41001da177e4SLinus Torvalds if (t == NULL) 41011da177e4SLinus Torvalds return; 41021da177e4SLinus Torvalds for (i=0; t->addrconf_vars[i].data; i++) { 41031da177e4SLinus Torvalds t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf; 41041da177e4SLinus Torvalds t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ 41051da177e4SLinus Torvalds } 41061da177e4SLinus Torvalds if (dev) { 41071da177e4SLinus Torvalds dev_name = dev->name; 41081da177e4SLinus Torvalds t->addrconf_dev[0].ctl_name = dev->ifindex; 41091da177e4SLinus Torvalds } else { 41101da177e4SLinus Torvalds dev_name = "default"; 41111da177e4SLinus Torvalds t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT; 41121da177e4SLinus Torvalds } 41131da177e4SLinus Torvalds 41141da177e4SLinus Torvalds /* 41151da177e4SLinus Torvalds * Make a copy of dev_name, because '.procname' is regarded as const 41161da177e4SLinus Torvalds * by sysctl and we wouldn't want anyone to change it under our feet 41171da177e4SLinus Torvalds * (see SIOCSIFNAME). 41181da177e4SLinus Torvalds */ 4119543537bdSPaulo Marques dev_name = kstrdup(dev_name, GFP_KERNEL); 41201da177e4SLinus Torvalds if (!dev_name) 41211da177e4SLinus Torvalds goto free; 41221da177e4SLinus Torvalds 41231da177e4SLinus Torvalds t->addrconf_dev[0].procname = dev_name; 41241da177e4SLinus Torvalds 41251da177e4SLinus Torvalds t->addrconf_dev[0].child = t->addrconf_vars; 41261da177e4SLinus Torvalds t->addrconf_conf_dir[0].child = t->addrconf_dev; 41271da177e4SLinus Torvalds t->addrconf_proto_dir[0].child = t->addrconf_conf_dir; 41281da177e4SLinus Torvalds t->addrconf_root_dir[0].child = t->addrconf_proto_dir; 41291da177e4SLinus Torvalds 41300b4d4147SEric W. Biederman t->sysctl_header = register_sysctl_table(t->addrconf_root_dir); 41311da177e4SLinus Torvalds if (t->sysctl_header == NULL) 41321da177e4SLinus Torvalds goto free_procname; 41331da177e4SLinus Torvalds else 41341da177e4SLinus Torvalds p->sysctl = t; 41351da177e4SLinus Torvalds return; 41361da177e4SLinus Torvalds 41371da177e4SLinus Torvalds /* error path */ 41381da177e4SLinus Torvalds free_procname: 41391da177e4SLinus Torvalds kfree(dev_name); 41401da177e4SLinus Torvalds free: 41411da177e4SLinus Torvalds kfree(t); 41421da177e4SLinus Torvalds 41431da177e4SLinus Torvalds return; 41441da177e4SLinus Torvalds } 41451da177e4SLinus Torvalds 41461da177e4SLinus Torvalds static void addrconf_sysctl_unregister(struct ipv6_devconf *p) 41471da177e4SLinus Torvalds { 41481da177e4SLinus Torvalds if (p->sysctl) { 41491da177e4SLinus Torvalds struct addrconf_sysctl_table *t = p->sysctl; 41501da177e4SLinus Torvalds p->sysctl = NULL; 41511da177e4SLinus Torvalds unregister_sysctl_table(t->sysctl_header); 41521da177e4SLinus Torvalds kfree(t->addrconf_dev[0].procname); 41531da177e4SLinus Torvalds kfree(t); 41541da177e4SLinus Torvalds } 41551da177e4SLinus Torvalds } 41561da177e4SLinus Torvalds 41571da177e4SLinus Torvalds 41581da177e4SLinus Torvalds #endif 41591da177e4SLinus Torvalds 41601da177e4SLinus Torvalds /* 41611da177e4SLinus Torvalds * Device notifier 41621da177e4SLinus Torvalds */ 41631da177e4SLinus Torvalds 41641da177e4SLinus Torvalds int register_inet6addr_notifier(struct notifier_block *nb) 41651da177e4SLinus Torvalds { 4166e041c683SAlan Stern return atomic_notifier_chain_register(&inet6addr_chain, nb); 41671da177e4SLinus Torvalds } 41681da177e4SLinus Torvalds 41697159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(register_inet6addr_notifier); 41707159039aSYOSHIFUJI Hideaki 41711da177e4SLinus Torvalds int unregister_inet6addr_notifier(struct notifier_block *nb) 41721da177e4SLinus Torvalds { 4173e041c683SAlan Stern return atomic_notifier_chain_unregister(&inet6addr_chain,nb); 41741da177e4SLinus Torvalds } 41751da177e4SLinus Torvalds 41767159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(unregister_inet6addr_notifier); 41777159039aSYOSHIFUJI Hideaki 41781da177e4SLinus Torvalds /* 41791da177e4SLinus Torvalds * Init / cleanup code 41801da177e4SLinus Torvalds */ 41811da177e4SLinus Torvalds 41821da177e4SLinus Torvalds int __init addrconf_init(void) 41831da177e4SLinus Torvalds { 41841da177e4SLinus Torvalds int err = 0; 41851da177e4SLinus Torvalds 41861da177e4SLinus Torvalds /* The addrconf netdev notifier requires that loopback_dev 41871da177e4SLinus Torvalds * has it's ipv6 private information allocated and setup 41881da177e4SLinus Torvalds * before it can bring up and give link-local addresses 41891da177e4SLinus Torvalds * to other devices which are up. 41901da177e4SLinus Torvalds * 41911da177e4SLinus Torvalds * Unfortunately, loopback_dev is not necessarily the first 41921da177e4SLinus Torvalds * entry in the global dev_base list of net devices. In fact, 41931da177e4SLinus Torvalds * it is likely to be the very last entry on that list. 41941da177e4SLinus Torvalds * So this causes the notifier registry below to try and 41951da177e4SLinus Torvalds * give link-local addresses to all devices besides loopback_dev 41961da177e4SLinus Torvalds * first, then loopback_dev, which cases all the non-loopback_dev 41971da177e4SLinus Torvalds * devices to fail to get a link-local address. 41981da177e4SLinus Torvalds * 41991da177e4SLinus Torvalds * So, as a temporary fix, allocate the ipv6 structure for 42001da177e4SLinus Torvalds * loopback_dev first by hand. 42011da177e4SLinus Torvalds * Longer term, all of the dependencies ipv6 has upon the loopback 42021da177e4SLinus Torvalds * device and it being up should be removed. 42031da177e4SLinus Torvalds */ 42041da177e4SLinus Torvalds rtnl_lock(); 42052774c7abSEric W. Biederman if (!ipv6_add_dev(init_net.loopback_dev)) 42061da177e4SLinus Torvalds err = -ENOMEM; 42071da177e4SLinus Torvalds rtnl_unlock(); 42081da177e4SLinus Torvalds if (err) 42091da177e4SLinus Torvalds return err; 42101da177e4SLinus Torvalds 42112774c7abSEric W. Biederman ip6_null_entry.u.dst.dev = init_net.loopback_dev; 42122774c7abSEric W. Biederman ip6_null_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev); 42139a6bf6feSYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_MULTIPLE_TABLES 42142774c7abSEric W. Biederman ip6_prohibit_entry.u.dst.dev = init_net.loopback_dev; 42152774c7abSEric W. Biederman ip6_prohibit_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev); 42162774c7abSEric W. Biederman ip6_blk_hole_entry.u.dst.dev = init_net.loopback_dev; 42172774c7abSEric W. Biederman ip6_blk_hole_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev); 42189a6bf6feSYOSHIFUJI Hideaki #endif 4219c62dba90SHerbert Xu 42201da177e4SLinus Torvalds register_netdevice_notifier(&ipv6_dev_notf); 42211da177e4SLinus Torvalds 42221da177e4SLinus Torvalds addrconf_verify(0); 4223c127ea2cSThomas Graf 4224c127ea2cSThomas Graf err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo); 4225c127ea2cSThomas Graf if (err < 0) 4226c127ea2cSThomas Graf goto errout; 4227c127ea2cSThomas Graf 4228c127ea2cSThomas Graf /* Only the first call to __rtnl_register can fail */ 4229c127ea2cSThomas Graf __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL); 4230c127ea2cSThomas Graf __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL); 4231c127ea2cSThomas Graf __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr); 4232c127ea2cSThomas Graf __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr); 4233c127ea2cSThomas Graf __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr); 4234c127ea2cSThomas Graf 42351da177e4SLinus Torvalds #ifdef CONFIG_SYSCTL 42361da177e4SLinus Torvalds addrconf_sysctl.sysctl_header = 42370b4d4147SEric W. Biederman register_sysctl_table(addrconf_sysctl.addrconf_root_dir); 42381da177e4SLinus Torvalds addrconf_sysctl_register(NULL, &ipv6_devconf_dflt); 42391da177e4SLinus Torvalds #endif 42401da177e4SLinus Torvalds 42411da177e4SLinus Torvalds return 0; 4242c127ea2cSThomas Graf errout: 4243c127ea2cSThomas Graf unregister_netdevice_notifier(&ipv6_dev_notf); 4244c127ea2cSThomas Graf 4245c127ea2cSThomas Graf return err; 42461da177e4SLinus Torvalds } 42471da177e4SLinus Torvalds 42481da177e4SLinus Torvalds void __exit addrconf_cleanup(void) 42491da177e4SLinus Torvalds { 42501da177e4SLinus Torvalds struct net_device *dev; 42511da177e4SLinus Torvalds struct inet6_ifaddr *ifa; 42521da177e4SLinus Torvalds int i; 42531da177e4SLinus Torvalds 42541da177e4SLinus Torvalds unregister_netdevice_notifier(&ipv6_dev_notf); 42551da177e4SLinus Torvalds 42561da177e4SLinus Torvalds #ifdef CONFIG_SYSCTL 42571da177e4SLinus Torvalds addrconf_sysctl_unregister(&ipv6_devconf_dflt); 42581da177e4SLinus Torvalds addrconf_sysctl_unregister(&ipv6_devconf); 42591da177e4SLinus Torvalds #endif 42601da177e4SLinus Torvalds 42611da177e4SLinus Torvalds rtnl_lock(); 42621da177e4SLinus Torvalds 42631da177e4SLinus Torvalds /* 42641da177e4SLinus Torvalds * clean dev list. 42651da177e4SLinus Torvalds */ 42661da177e4SLinus Torvalds 4267881d966bSEric W. Biederman for_each_netdev(&init_net, dev) { 4268dffe4f04SMicah Gruber if (__in6_dev_get(dev) == NULL) 42691da177e4SLinus Torvalds continue; 42701da177e4SLinus Torvalds addrconf_ifdown(dev, 1); 42711da177e4SLinus Torvalds } 42722774c7abSEric W. Biederman addrconf_ifdown(init_net.loopback_dev, 2); 42731da177e4SLinus Torvalds 42741da177e4SLinus Torvalds /* 42751da177e4SLinus Torvalds * Check hash table. 42761da177e4SLinus Torvalds */ 42771da177e4SLinus Torvalds 42781da177e4SLinus Torvalds write_lock_bh(&addrconf_hash_lock); 42791da177e4SLinus Torvalds for (i=0; i < IN6_ADDR_HSIZE; i++) { 42801da177e4SLinus Torvalds for (ifa=inet6_addr_lst[i]; ifa; ) { 42811da177e4SLinus Torvalds struct inet6_ifaddr *bifa; 42821da177e4SLinus Torvalds 42831da177e4SLinus Torvalds bifa = ifa; 42841da177e4SLinus Torvalds ifa = ifa->lst_next; 42851da177e4SLinus Torvalds printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa); 42861da177e4SLinus Torvalds /* Do not free it; something is wrong. 42871da177e4SLinus Torvalds Now we can investigate it with debugger. 42881da177e4SLinus Torvalds */ 42891da177e4SLinus Torvalds } 42901da177e4SLinus Torvalds } 42911da177e4SLinus Torvalds write_unlock_bh(&addrconf_hash_lock); 42921da177e4SLinus Torvalds 42931da177e4SLinus Torvalds del_timer(&addr_chk_timer); 42941da177e4SLinus Torvalds 42951da177e4SLinus Torvalds rtnl_unlock(); 42961da177e4SLinus Torvalds 42971da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 4298457c4cbcSEric W. Biederman proc_net_remove(&init_net, "if_inet6"); 42991da177e4SLinus Torvalds #endif 43001da177e4SLinus Torvalds } 4301