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 if (snmp_mib_init((void **)idev->stats.ipv6, 2597f7d9a6bSHerbert Xu sizeof(struct ipstats_mib), 2607f7d9a6bSHerbert Xu __alignof__(struct ipstats_mib)) < 0) 2617f7d9a6bSHerbert Xu goto err_ip; 2627f7d9a6bSHerbert Xu if (snmp_mib_init((void **)idev->stats.icmpv6, 2637f7d9a6bSHerbert Xu sizeof(struct icmpv6_mib), 2647f7d9a6bSHerbert Xu __alignof__(struct icmpv6_mib)) < 0) 2657f7d9a6bSHerbert Xu goto err_icmp; 26614878f75SDavid L Stevens if (snmp_mib_init((void **)idev->stats.icmpv6msg, 26714878f75SDavid L Stevens sizeof(struct icmpv6msg_mib), 26814878f75SDavid L Stevens __alignof__(struct icmpv6msg_mib)) < 0) 26914878f75SDavid L Stevens goto err_icmpmsg; 2707f7d9a6bSHerbert Xu 2717f7d9a6bSHerbert Xu return 0; 2727f7d9a6bSHerbert Xu 27314878f75SDavid L Stevens err_icmpmsg: 27414878f75SDavid L Stevens snmp_mib_free((void **)idev->stats.icmpv6); 2757f7d9a6bSHerbert Xu err_icmp: 2767f7d9a6bSHerbert Xu snmp_mib_free((void **)idev->stats.ipv6); 2777f7d9a6bSHerbert Xu err_ip: 278aaf70ec7SPavel Emelyanov return -ENOMEM; 2797f7d9a6bSHerbert Xu } 2807f7d9a6bSHerbert Xu 28116910b98SPavel Emelyanov static void snmp6_free_dev(struct inet6_dev *idev) 2827f7d9a6bSHerbert Xu { 28314878f75SDavid L Stevens snmp_mib_free((void **)idev->stats.icmpv6msg); 2847f7d9a6bSHerbert Xu snmp_mib_free((void **)idev->stats.icmpv6); 2857f7d9a6bSHerbert Xu snmp_mib_free((void **)idev->stats.ipv6); 2867f7d9a6bSHerbert Xu } 2877f7d9a6bSHerbert Xu 2881da177e4SLinus Torvalds /* Nobody refers to this device, we may destroy it. */ 2891da177e4SLinus Torvalds 2908814c4b5SYOSHIFUJI Hideaki static void in6_dev_finish_destroy_rcu(struct rcu_head *head) 2918814c4b5SYOSHIFUJI Hideaki { 2928814c4b5SYOSHIFUJI Hideaki struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu); 2938814c4b5SYOSHIFUJI Hideaki kfree(idev); 2948814c4b5SYOSHIFUJI Hideaki } 2958814c4b5SYOSHIFUJI Hideaki 2961da177e4SLinus Torvalds void in6_dev_finish_destroy(struct inet6_dev *idev) 2971da177e4SLinus Torvalds { 2981da177e4SLinus Torvalds struct net_device *dev = idev->dev; 2991da177e4SLinus Torvalds BUG_TRAP(idev->addr_list==NULL); 3001da177e4SLinus Torvalds BUG_TRAP(idev->mc_list==NULL); 3011da177e4SLinus Torvalds #ifdef NET_REFCNT_DEBUG 3021da177e4SLinus Torvalds printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL"); 3031da177e4SLinus Torvalds #endif 3041da177e4SLinus Torvalds dev_put(dev); 3051da177e4SLinus Torvalds if (!idev->dead) { 3061da177e4SLinus Torvalds printk("Freeing alive inet6 device %p\n", idev); 3071da177e4SLinus Torvalds return; 3081da177e4SLinus Torvalds } 3091da177e4SLinus Torvalds snmp6_free_dev(idev); 3108814c4b5SYOSHIFUJI Hideaki call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu); 3111da177e4SLinus Torvalds } 3121da177e4SLinus Torvalds 3137159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(in6_dev_finish_destroy); 3147159039aSYOSHIFUJI Hideaki 3151da177e4SLinus Torvalds static struct inet6_dev * ipv6_add_dev(struct net_device *dev) 3161da177e4SLinus Torvalds { 3171da177e4SLinus Torvalds struct inet6_dev *ndev; 318d88ae4ccSYOSHIFUJI Hideaki struct in6_addr maddr; 3191da177e4SLinus Torvalds 3201da177e4SLinus Torvalds ASSERT_RTNL(); 3211da177e4SLinus Torvalds 3221da177e4SLinus Torvalds if (dev->mtu < IPV6_MIN_MTU) 3231da177e4SLinus Torvalds return NULL; 3241da177e4SLinus Torvalds 325322f74a4SIngo Oeser ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); 3261da177e4SLinus Torvalds 327322f74a4SIngo Oeser if (ndev == NULL) 328322f74a4SIngo Oeser return NULL; 3291da177e4SLinus Torvalds 3301da177e4SLinus Torvalds rwlock_init(&ndev->lock); 3311da177e4SLinus Torvalds ndev->dev = dev; 3321da177e4SLinus Torvalds memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf)); 3331da177e4SLinus Torvalds ndev->cnf.mtu6 = dev->mtu; 3341da177e4SLinus Torvalds ndev->cnf.sysctl = NULL; 3351da177e4SLinus Torvalds ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); 3361da177e4SLinus Torvalds if (ndev->nd_parms == NULL) { 3371da177e4SLinus Torvalds kfree(ndev); 3381da177e4SLinus Torvalds return NULL; 3391da177e4SLinus Torvalds } 3401da177e4SLinus Torvalds /* We refer to the device */ 3411da177e4SLinus Torvalds dev_hold(dev); 3421da177e4SLinus Torvalds 3431da177e4SLinus Torvalds if (snmp6_alloc_dev(ndev) < 0) { 3441da177e4SLinus Torvalds ADBG((KERN_WARNING 3451da177e4SLinus Torvalds "%s(): cannot allocate memory for statistics; dev=%s.\n", 3461da177e4SLinus Torvalds __FUNCTION__, dev->name)); 3471da177e4SLinus Torvalds neigh_parms_release(&nd_tbl, ndev->nd_parms); 3481da177e4SLinus Torvalds ndev->dead = 1; 3491da177e4SLinus Torvalds in6_dev_finish_destroy(ndev); 3501da177e4SLinus Torvalds return NULL; 3511da177e4SLinus Torvalds } 3521da177e4SLinus Torvalds 3531da177e4SLinus Torvalds if (snmp6_register_dev(ndev) < 0) { 3541da177e4SLinus Torvalds ADBG((KERN_WARNING 3551da177e4SLinus Torvalds "%s(): cannot create /proc/net/dev_snmp6/%s\n", 3561da177e4SLinus Torvalds __FUNCTION__, dev->name)); 3571da177e4SLinus Torvalds neigh_parms_release(&nd_tbl, ndev->nd_parms); 3581da177e4SLinus Torvalds ndev->dead = 1; 3591da177e4SLinus Torvalds in6_dev_finish_destroy(ndev); 3601da177e4SLinus Torvalds return NULL; 3611da177e4SLinus Torvalds } 3621da177e4SLinus Torvalds 3631da177e4SLinus Torvalds /* One reference from device. We must do this before 3641da177e4SLinus Torvalds * we invoke __ipv6_regen_rndid(). 3651da177e4SLinus Torvalds */ 3661da177e4SLinus Torvalds in6_dev_hold(ndev); 3671da177e4SLinus Torvalds 3681da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 369b24b8a24SPavel Emelyanov setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); 3701da177e4SLinus Torvalds if ((dev->flags&IFF_LOOPBACK) || 3711da177e4SLinus Torvalds dev->type == ARPHRD_TUNNEL || 3720be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) 3730be669bbSJoerg Roedel dev->type == ARPHRD_SIT || 3740be669bbSJoerg Roedel #endif 3750be669bbSJoerg Roedel dev->type == ARPHRD_NONE) { 3761da177e4SLinus Torvalds printk(KERN_INFO 377a1493d9cSDavid S. Miller "%s: Disabled Privacy Extensions\n", 378a1493d9cSDavid S. Miller dev->name); 3791da177e4SLinus Torvalds ndev->cnf.use_tempaddr = -1; 380c7dc89c0SFred L. Templin 381c7dc89c0SFred L. Templin if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { 382c7dc89c0SFred L. Templin printk(KERN_INFO 383c7dc89c0SFred L. Templin "%s: Disabled Multicast RS\n", 384c7dc89c0SFred L. Templin dev->name); 385c7dc89c0SFred L. Templin ndev->cnf.rtr_solicits = 0; 386c7dc89c0SFred L. Templin } 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 int ipv6_dev_get_saddr(struct net_device *daddr_dev, 8851da177e4SLinus Torvalds struct in6_addr *daddr, struct in6_addr *saddr) 8861da177e4SLinus Torvalds { 887072047e4SYOSHIFUJI Hideaki struct ipv6_saddr_score hiscore; 888072047e4SYOSHIFUJI Hideaki struct inet6_ifaddr *ifa_result = NULL; 889072047e4SYOSHIFUJI Hideaki int daddr_type = __ipv6_addr_type(daddr); 890072047e4SYOSHIFUJI Hideaki int daddr_scope = __ipv6_addr_src_scope(daddr_type); 891303065a8SYOSHIFUJI Hideaki int daddr_ifindex = daddr_dev ? daddr_dev->ifindex : 0; 892303065a8SYOSHIFUJI Hideaki u32 daddr_label = ipv6_addr_label(daddr, daddr_type, daddr_ifindex); 893072047e4SYOSHIFUJI Hideaki struct net_device *dev; 8941da177e4SLinus Torvalds 895072047e4SYOSHIFUJI Hideaki memset(&hiscore, 0, sizeof(hiscore)); 8961da177e4SLinus Torvalds 8971da177e4SLinus Torvalds read_lock(&dev_base_lock); 8988814c4b5SYOSHIFUJI Hideaki rcu_read_lock(); 899072047e4SYOSHIFUJI Hideaki 900881d966bSEric W. Biederman for_each_netdev(&init_net, dev) { 901072047e4SYOSHIFUJI Hideaki struct inet6_dev *idev; 902072047e4SYOSHIFUJI Hideaki struct inet6_ifaddr *ifa; 903072047e4SYOSHIFUJI Hideaki 904072047e4SYOSHIFUJI Hideaki /* Rule 0: Candidate Source Address (section 4) 905072047e4SYOSHIFUJI Hideaki * - multicast and link-local destination address, 906072047e4SYOSHIFUJI Hideaki * the set of candidate source address MUST only 907072047e4SYOSHIFUJI Hideaki * include addresses assigned to interfaces 908072047e4SYOSHIFUJI Hideaki * belonging to the same link as the outgoing 909072047e4SYOSHIFUJI Hideaki * interface. 910072047e4SYOSHIFUJI Hideaki * (- For site-local destination addresses, the 911072047e4SYOSHIFUJI Hideaki * set of candidate source addresses MUST only 912072047e4SYOSHIFUJI Hideaki * include addresses assigned to interfaces 913072047e4SYOSHIFUJI Hideaki * belonging to the same site as the outgoing 914072047e4SYOSHIFUJI Hideaki * interface.) 915072047e4SYOSHIFUJI Hideaki */ 916072047e4SYOSHIFUJI Hideaki if ((daddr_type & IPV6_ADDR_MULTICAST || 917072047e4SYOSHIFUJI Hideaki daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && 918072047e4SYOSHIFUJI Hideaki daddr_dev && dev != daddr_dev) 919072047e4SYOSHIFUJI Hideaki continue; 920072047e4SYOSHIFUJI Hideaki 9211da177e4SLinus Torvalds idev = __in6_dev_get(dev); 922072047e4SYOSHIFUJI Hideaki if (!idev) 923072047e4SYOSHIFUJI Hideaki continue; 924072047e4SYOSHIFUJI Hideaki 9251da177e4SLinus Torvalds read_lock_bh(&idev->lock); 926072047e4SYOSHIFUJI Hideaki for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) { 927072047e4SYOSHIFUJI Hideaki struct ipv6_saddr_score score; 928072047e4SYOSHIFUJI Hideaki 929072047e4SYOSHIFUJI Hideaki score.addr_type = __ipv6_addr_type(&ifa->addr); 930072047e4SYOSHIFUJI Hideaki 9316b3ae80aSYOSHIFUJI Hideaki /* Rule 0: 9326b3ae80aSYOSHIFUJI Hideaki * - Tentative Address (RFC2462 section 5.4) 9336b3ae80aSYOSHIFUJI Hideaki * - A tentative address is not considered 9346b3ae80aSYOSHIFUJI Hideaki * "assigned to an interface" in the traditional 93595c385b4SNeil Horman * sense, unless it is also flagged as optimistic. 9366b3ae80aSYOSHIFUJI Hideaki * - Candidate Source Address (section 4) 937072047e4SYOSHIFUJI Hideaki * - In any case, anycast addresses, multicast 938072047e4SYOSHIFUJI Hideaki * addresses, and the unspecified address MUST 939072047e4SYOSHIFUJI Hideaki * NOT be included in a candidate set. 940072047e4SYOSHIFUJI Hideaki */ 94195c385b4SNeil Horman if ((ifa->flags & IFA_F_TENTATIVE) && 94295c385b4SNeil Horman (!(ifa->flags & IFA_F_OPTIMISTIC))) 9436b3ae80aSYOSHIFUJI Hideaki continue; 944072047e4SYOSHIFUJI Hideaki if (unlikely(score.addr_type == IPV6_ADDR_ANY || 945072047e4SYOSHIFUJI Hideaki score.addr_type & IPV6_ADDR_MULTICAST)) { 946072047e4SYOSHIFUJI Hideaki LIMIT_NETDEBUG(KERN_DEBUG 947072047e4SYOSHIFUJI Hideaki "ADDRCONF: unspecified / multicast address " 948072047e4SYOSHIFUJI Hideaki "assigned as unicast address on %s", 949072047e4SYOSHIFUJI Hideaki dev->name); 9501da177e4SLinus Torvalds continue; 951072047e4SYOSHIFUJI Hideaki } 952072047e4SYOSHIFUJI Hideaki 953072047e4SYOSHIFUJI Hideaki score.attrs = 0; 954072047e4SYOSHIFUJI Hideaki score.matchlen = 0; 955072047e4SYOSHIFUJI Hideaki score.scope = 0; 956072047e4SYOSHIFUJI Hideaki score.rule = 0; 957072047e4SYOSHIFUJI Hideaki 958072047e4SYOSHIFUJI Hideaki if (ifa_result == NULL) { 959072047e4SYOSHIFUJI Hideaki /* record it if the first available entry */ 960072047e4SYOSHIFUJI Hideaki goto record_it; 961072047e4SYOSHIFUJI Hideaki } 962072047e4SYOSHIFUJI Hideaki 963072047e4SYOSHIFUJI Hideaki /* Rule 1: Prefer same address */ 964072047e4SYOSHIFUJI Hideaki if (hiscore.rule < 1) { 965072047e4SYOSHIFUJI Hideaki if (ipv6_addr_equal(&ifa_result->addr, daddr)) 966072047e4SYOSHIFUJI Hideaki hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL; 967072047e4SYOSHIFUJI Hideaki hiscore.rule++; 968072047e4SYOSHIFUJI Hideaki } 969072047e4SYOSHIFUJI Hideaki if (ipv6_addr_equal(&ifa->addr, daddr)) { 970072047e4SYOSHIFUJI Hideaki score.attrs |= IPV6_SADDR_SCORE_LOCAL; 971072047e4SYOSHIFUJI Hideaki if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) { 972072047e4SYOSHIFUJI Hideaki score.rule = 1; 973072047e4SYOSHIFUJI Hideaki goto record_it; 974072047e4SYOSHIFUJI Hideaki } 975072047e4SYOSHIFUJI Hideaki } else { 976072047e4SYOSHIFUJI Hideaki if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL) 977072047e4SYOSHIFUJI Hideaki continue; 978072047e4SYOSHIFUJI Hideaki } 979072047e4SYOSHIFUJI Hideaki 980072047e4SYOSHIFUJI Hideaki /* Rule 2: Prefer appropriate scope */ 981072047e4SYOSHIFUJI Hideaki if (hiscore.rule < 2) { 982072047e4SYOSHIFUJI Hideaki hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type); 983072047e4SYOSHIFUJI Hideaki hiscore.rule++; 984072047e4SYOSHIFUJI Hideaki } 985072047e4SYOSHIFUJI Hideaki score.scope = __ipv6_addr_src_scope(score.addr_type); 986072047e4SYOSHIFUJI Hideaki if (hiscore.scope < score.scope) { 987072047e4SYOSHIFUJI Hideaki if (hiscore.scope < daddr_scope) { 988072047e4SYOSHIFUJI Hideaki score.rule = 2; 989072047e4SYOSHIFUJI Hideaki goto record_it; 990072047e4SYOSHIFUJI Hideaki } else 991072047e4SYOSHIFUJI Hideaki continue; 992072047e4SYOSHIFUJI Hideaki } else if (score.scope < hiscore.scope) { 993072047e4SYOSHIFUJI Hideaki if (score.scope < daddr_scope) 994e55ffac6SBrian Haley break; /* addresses sorted by scope */ 995072047e4SYOSHIFUJI Hideaki else { 996072047e4SYOSHIFUJI Hideaki score.rule = 2; 997072047e4SYOSHIFUJI Hideaki goto record_it; 998072047e4SYOSHIFUJI Hideaki } 999072047e4SYOSHIFUJI Hideaki } 1000072047e4SYOSHIFUJI Hideaki 100195c385b4SNeil Horman /* Rule 3: Avoid deprecated and optimistic addresses */ 1002072047e4SYOSHIFUJI Hideaki if (hiscore.rule < 3) { 1003072047e4SYOSHIFUJI Hideaki if (ipv6_saddr_preferred(hiscore.addr_type) || 100495c385b4SNeil Horman (((ifa_result->flags & 100595c385b4SNeil Horman (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0))) 1006072047e4SYOSHIFUJI Hideaki hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED; 1007072047e4SYOSHIFUJI Hideaki hiscore.rule++; 1008072047e4SYOSHIFUJI Hideaki } 1009072047e4SYOSHIFUJI Hideaki if (ipv6_saddr_preferred(score.addr_type) || 10106ae5f983SJiri Kosina (((ifa->flags & 101195c385b4SNeil Horman (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0))) { 1012072047e4SYOSHIFUJI Hideaki score.attrs |= IPV6_SADDR_SCORE_PREFERRED; 1013072047e4SYOSHIFUJI Hideaki if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) { 1014072047e4SYOSHIFUJI Hideaki score.rule = 3; 1015072047e4SYOSHIFUJI Hideaki goto record_it; 1016072047e4SYOSHIFUJI Hideaki } 1017072047e4SYOSHIFUJI Hideaki } else { 1018072047e4SYOSHIFUJI Hideaki if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED) 1019072047e4SYOSHIFUJI Hideaki continue; 1020072047e4SYOSHIFUJI Hideaki } 1021072047e4SYOSHIFUJI Hideaki 10223b9f9a1cSNoriaki TAKAMIYA /* Rule 4: Prefer home address */ 102359fbb3a6SMasahide NAKAMURA #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) 10243b9f9a1cSNoriaki TAKAMIYA if (hiscore.rule < 4) { 10253b9f9a1cSNoriaki TAKAMIYA if (ifa_result->flags & IFA_F_HOMEADDRESS) 10263b9f9a1cSNoriaki TAKAMIYA hiscore.attrs |= IPV6_SADDR_SCORE_HOA; 10273b9f9a1cSNoriaki TAKAMIYA hiscore.rule++; 10283b9f9a1cSNoriaki TAKAMIYA } 10293b9f9a1cSNoriaki TAKAMIYA if (ifa->flags & IFA_F_HOMEADDRESS) { 10303b9f9a1cSNoriaki TAKAMIYA score.attrs |= IPV6_SADDR_SCORE_HOA; 10313b9f9a1cSNoriaki TAKAMIYA if (!(ifa_result->flags & IFA_F_HOMEADDRESS)) { 10323b9f9a1cSNoriaki TAKAMIYA score.rule = 4; 10333b9f9a1cSNoriaki TAKAMIYA goto record_it; 10343b9f9a1cSNoriaki TAKAMIYA } 10353b9f9a1cSNoriaki TAKAMIYA } else { 10363b9f9a1cSNoriaki TAKAMIYA if (hiscore.attrs & IPV6_SADDR_SCORE_HOA) 10373b9f9a1cSNoriaki TAKAMIYA continue; 10383b9f9a1cSNoriaki TAKAMIYA } 10393b9f9a1cSNoriaki TAKAMIYA #else 1040220bbd74SYOSHIFUJI Hideaki if (hiscore.rule < 4) 1041220bbd74SYOSHIFUJI Hideaki hiscore.rule++; 10423b9f9a1cSNoriaki TAKAMIYA #endif 1043072047e4SYOSHIFUJI Hideaki 1044072047e4SYOSHIFUJI Hideaki /* Rule 5: Prefer outgoing interface */ 1045072047e4SYOSHIFUJI Hideaki if (hiscore.rule < 5) { 1046072047e4SYOSHIFUJI Hideaki if (daddr_dev == NULL || 1047072047e4SYOSHIFUJI Hideaki daddr_dev == ifa_result->idev->dev) 1048072047e4SYOSHIFUJI Hideaki hiscore.attrs |= IPV6_SADDR_SCORE_OIF; 1049072047e4SYOSHIFUJI Hideaki hiscore.rule++; 1050072047e4SYOSHIFUJI Hideaki } 1051072047e4SYOSHIFUJI Hideaki if (daddr_dev == NULL || 1052072047e4SYOSHIFUJI Hideaki daddr_dev == ifa->idev->dev) { 1053072047e4SYOSHIFUJI Hideaki score.attrs |= IPV6_SADDR_SCORE_OIF; 1054072047e4SYOSHIFUJI Hideaki if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) { 1055072047e4SYOSHIFUJI Hideaki score.rule = 5; 1056072047e4SYOSHIFUJI Hideaki goto record_it; 1057072047e4SYOSHIFUJI Hideaki } 1058072047e4SYOSHIFUJI Hideaki } else { 1059072047e4SYOSHIFUJI Hideaki if (hiscore.attrs & IPV6_SADDR_SCORE_OIF) 1060072047e4SYOSHIFUJI Hideaki continue; 1061072047e4SYOSHIFUJI Hideaki } 1062072047e4SYOSHIFUJI Hideaki 1063072047e4SYOSHIFUJI Hideaki /* Rule 6: Prefer matching label */ 1064072047e4SYOSHIFUJI Hideaki if (hiscore.rule < 6) { 1065c1ee656cSYOSHIFUJI Hideaki if (ipv6_addr_label(&ifa_result->addr, 1066303065a8SYOSHIFUJI Hideaki hiscore.addr_type, 1067303065a8SYOSHIFUJI Hideaki ifa_result->idev->dev->ifindex) == daddr_label) 1068072047e4SYOSHIFUJI Hideaki hiscore.attrs |= IPV6_SADDR_SCORE_LABEL; 1069072047e4SYOSHIFUJI Hideaki hiscore.rule++; 1070072047e4SYOSHIFUJI Hideaki } 1071c1ee656cSYOSHIFUJI Hideaki if (ipv6_addr_label(&ifa->addr, 1072303065a8SYOSHIFUJI Hideaki score.addr_type, 1073303065a8SYOSHIFUJI Hideaki ifa->idev->dev->ifindex) == daddr_label) { 1074072047e4SYOSHIFUJI Hideaki score.attrs |= IPV6_SADDR_SCORE_LABEL; 1075072047e4SYOSHIFUJI Hideaki if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) { 1076072047e4SYOSHIFUJI Hideaki score.rule = 6; 1077072047e4SYOSHIFUJI Hideaki goto record_it; 1078072047e4SYOSHIFUJI Hideaki } 1079072047e4SYOSHIFUJI Hideaki } else { 1080072047e4SYOSHIFUJI Hideaki if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL) 1081072047e4SYOSHIFUJI Hideaki continue; 1082072047e4SYOSHIFUJI Hideaki } 1083072047e4SYOSHIFUJI Hideaki 108444fd0261SPeter Chubb #ifdef CONFIG_IPV6_PRIVACY 1085072047e4SYOSHIFUJI Hideaki /* Rule 7: Prefer public address 1086072047e4SYOSHIFUJI Hideaki * Note: prefer temprary address if use_tempaddr >= 2 1087072047e4SYOSHIFUJI Hideaki */ 1088072047e4SYOSHIFUJI Hideaki if (hiscore.rule < 7) { 1089072047e4SYOSHIFUJI Hideaki if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^ 1090072047e4SYOSHIFUJI Hideaki (ifa_result->idev->cnf.use_tempaddr >= 2)) 1091072047e4SYOSHIFUJI Hideaki hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY; 1092072047e4SYOSHIFUJI Hideaki hiscore.rule++; 1093072047e4SYOSHIFUJI Hideaki } 1094072047e4SYOSHIFUJI Hideaki if ((!(ifa->flags & IFA_F_TEMPORARY)) ^ 1095072047e4SYOSHIFUJI Hideaki (ifa->idev->cnf.use_tempaddr >= 2)) { 1096072047e4SYOSHIFUJI Hideaki score.attrs |= IPV6_SADDR_SCORE_PRIVACY; 1097072047e4SYOSHIFUJI Hideaki if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) { 1098072047e4SYOSHIFUJI Hideaki score.rule = 7; 1099072047e4SYOSHIFUJI Hideaki goto record_it; 1100072047e4SYOSHIFUJI Hideaki } 1101072047e4SYOSHIFUJI Hideaki } else { 1102072047e4SYOSHIFUJI Hideaki if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY) 1103072047e4SYOSHIFUJI Hideaki continue; 1104072047e4SYOSHIFUJI Hideaki } 11055e2707faSYOSHIFUJI Hideaki #else 11065e2707faSYOSHIFUJI Hideaki if (hiscore.rule < 7) 11075e2707faSYOSHIFUJI Hideaki hiscore.rule++; 110844fd0261SPeter Chubb #endif 1109072047e4SYOSHIFUJI Hideaki /* Rule 8: Use longest matching prefix */ 111012da2a43SYan Zheng if (hiscore.rule < 8) { 1111072047e4SYOSHIFUJI Hideaki hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr); 111212da2a43SYan Zheng hiscore.rule++; 111312da2a43SYan Zheng } 1114072047e4SYOSHIFUJI Hideaki score.matchlen = ipv6_addr_diff(&ifa->addr, daddr); 1115072047e4SYOSHIFUJI Hideaki if (score.matchlen > hiscore.matchlen) { 1116072047e4SYOSHIFUJI Hideaki score.rule = 8; 1117072047e4SYOSHIFUJI Hideaki goto record_it; 1118072047e4SYOSHIFUJI Hideaki } 1119072047e4SYOSHIFUJI Hideaki #if 0 1120072047e4SYOSHIFUJI Hideaki else if (score.matchlen < hiscore.matchlen) 1121072047e4SYOSHIFUJI Hideaki continue; 11221da177e4SLinus Torvalds #endif 1123072047e4SYOSHIFUJI Hideaki 1124072047e4SYOSHIFUJI Hideaki /* Final Rule: choose first available one */ 11251da177e4SLinus Torvalds continue; 1126072047e4SYOSHIFUJI Hideaki record_it: 1127072047e4SYOSHIFUJI Hideaki if (ifa_result) 1128072047e4SYOSHIFUJI Hideaki in6_ifa_put(ifa_result); 1129072047e4SYOSHIFUJI Hideaki in6_ifa_hold(ifa); 1130072047e4SYOSHIFUJI Hideaki ifa_result = ifa; 11311da177e4SLinus Torvalds hiscore = score; 11321da177e4SLinus Torvalds } 11331da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 11341da177e4SLinus Torvalds } 11358814c4b5SYOSHIFUJI Hideaki rcu_read_unlock(); 11361da177e4SLinus Torvalds read_unlock(&dev_base_lock); 11371da177e4SLinus Torvalds 1138072047e4SYOSHIFUJI Hideaki if (!ifa_result) 1139072047e4SYOSHIFUJI Hideaki return -EADDRNOTAVAIL; 11401da177e4SLinus Torvalds 1141072047e4SYOSHIFUJI Hideaki ipv6_addr_copy(saddr, &ifa_result->addr); 1142072047e4SYOSHIFUJI Hideaki in6_ifa_put(ifa_result); 1143072047e4SYOSHIFUJI Hideaki return 0; 11441da177e4SLinus Torvalds } 11451da177e4SLinus Torvalds 11461da177e4SLinus Torvalds 11471da177e4SLinus Torvalds int ipv6_get_saddr(struct dst_entry *dst, 11481da177e4SLinus Torvalds struct in6_addr *daddr, struct in6_addr *saddr) 11491da177e4SLinus Torvalds { 11507a3025b1SYOSHIFUJI Hideaki return ipv6_dev_get_saddr(dst ? ip6_dst_idev(dst)->dev : NULL, daddr, saddr); 11511da177e4SLinus Torvalds } 11521da177e4SLinus Torvalds 11537159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(ipv6_get_saddr); 11541da177e4SLinus Torvalds 115595c385b4SNeil Horman int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, 115695c385b4SNeil Horman unsigned char banned_flags) 11571da177e4SLinus Torvalds { 11581da177e4SLinus Torvalds struct inet6_dev *idev; 11591da177e4SLinus Torvalds int err = -EADDRNOTAVAIL; 11601da177e4SLinus Torvalds 11618814c4b5SYOSHIFUJI Hideaki rcu_read_lock(); 11621da177e4SLinus Torvalds if ((idev = __in6_dev_get(dev)) != NULL) { 11631da177e4SLinus Torvalds struct inet6_ifaddr *ifp; 11641da177e4SLinus Torvalds 11651da177e4SLinus Torvalds read_lock_bh(&idev->lock); 11661da177e4SLinus Torvalds for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { 116795c385b4SNeil Horman if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) { 11681da177e4SLinus Torvalds ipv6_addr_copy(addr, &ifp->addr); 11691da177e4SLinus Torvalds err = 0; 11701da177e4SLinus Torvalds break; 11711da177e4SLinus Torvalds } 11721da177e4SLinus Torvalds } 11731da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 11741da177e4SLinus Torvalds } 11758814c4b5SYOSHIFUJI Hideaki rcu_read_unlock(); 11761da177e4SLinus Torvalds return err; 11771da177e4SLinus Torvalds } 11781da177e4SLinus Torvalds 11791da177e4SLinus Torvalds static int ipv6_count_addresses(struct inet6_dev *idev) 11801da177e4SLinus Torvalds { 11811da177e4SLinus Torvalds int cnt = 0; 11821da177e4SLinus Torvalds struct inet6_ifaddr *ifp; 11831da177e4SLinus Torvalds 11841da177e4SLinus Torvalds read_lock_bh(&idev->lock); 11851da177e4SLinus Torvalds for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) 11861da177e4SLinus Torvalds cnt++; 11871da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 11881da177e4SLinus Torvalds return cnt; 11891da177e4SLinus Torvalds } 11901da177e4SLinus Torvalds 11911da177e4SLinus Torvalds int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict) 11921da177e4SLinus Torvalds { 11931da177e4SLinus Torvalds struct inet6_ifaddr * ifp; 11941da177e4SLinus Torvalds u8 hash = ipv6_addr_hash(addr); 11951da177e4SLinus Torvalds 11961da177e4SLinus Torvalds read_lock_bh(&addrconf_hash_lock); 11971da177e4SLinus Torvalds for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { 11981da177e4SLinus Torvalds if (ipv6_addr_equal(&ifp->addr, addr) && 11991da177e4SLinus Torvalds !(ifp->flags&IFA_F_TENTATIVE)) { 12001da177e4SLinus Torvalds if (dev == NULL || ifp->idev->dev == dev || 12011da177e4SLinus Torvalds !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) 12021da177e4SLinus Torvalds break; 12031da177e4SLinus Torvalds } 12041da177e4SLinus Torvalds } 12051da177e4SLinus Torvalds read_unlock_bh(&addrconf_hash_lock); 12061da177e4SLinus Torvalds return ifp != NULL; 12071da177e4SLinus Torvalds } 12081da177e4SLinus Torvalds 12097159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(ipv6_chk_addr); 12107159039aSYOSHIFUJI Hideaki 12111da177e4SLinus Torvalds static 12121da177e4SLinus Torvalds int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev) 12131da177e4SLinus Torvalds { 12141da177e4SLinus Torvalds struct inet6_ifaddr * ifp; 12151da177e4SLinus Torvalds u8 hash = ipv6_addr_hash(addr); 12161da177e4SLinus Torvalds 12171da177e4SLinus Torvalds for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { 12181da177e4SLinus Torvalds if (ipv6_addr_equal(&ifp->addr, addr)) { 12191da177e4SLinus Torvalds if (dev == NULL || ifp->idev->dev == dev) 12201da177e4SLinus Torvalds break; 12211da177e4SLinus Torvalds } 12221da177e4SLinus Torvalds } 12231da177e4SLinus Torvalds return ifp != NULL; 12241da177e4SLinus Torvalds } 12251da177e4SLinus Torvalds 12261da177e4SLinus Torvalds struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict) 12271da177e4SLinus Torvalds { 12281da177e4SLinus Torvalds struct inet6_ifaddr * ifp; 12291da177e4SLinus Torvalds u8 hash = ipv6_addr_hash(addr); 12301da177e4SLinus Torvalds 12311da177e4SLinus Torvalds read_lock_bh(&addrconf_hash_lock); 12321da177e4SLinus Torvalds for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { 12331da177e4SLinus Torvalds if (ipv6_addr_equal(&ifp->addr, addr)) { 12341da177e4SLinus Torvalds if (dev == NULL || ifp->idev->dev == dev || 12351da177e4SLinus Torvalds !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { 12361da177e4SLinus Torvalds in6_ifa_hold(ifp); 12371da177e4SLinus Torvalds break; 12381da177e4SLinus Torvalds } 12391da177e4SLinus Torvalds } 12401da177e4SLinus Torvalds } 12411da177e4SLinus Torvalds read_unlock_bh(&addrconf_hash_lock); 12421da177e4SLinus Torvalds 12431da177e4SLinus Torvalds return ifp; 12441da177e4SLinus Torvalds } 12451da177e4SLinus Torvalds 12461da177e4SLinus Torvalds int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) 12471da177e4SLinus Torvalds { 12481da177e4SLinus Torvalds const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; 12490fa1a53eSArnaldo Carvalho de Melo const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); 125082103232SAl Viro __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr; 125182103232SAl Viro __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2); 12521da177e4SLinus Torvalds int sk_ipv6only = ipv6_only_sock(sk); 1253463c84b9SArnaldo Carvalho de Melo int sk2_ipv6only = inet_v6_ipv6only(sk2); 12541da177e4SLinus Torvalds int addr_type = ipv6_addr_type(sk_rcv_saddr6); 12551da177e4SLinus Torvalds int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; 12561da177e4SLinus Torvalds 12571da177e4SLinus Torvalds if (!sk2_rcv_saddr && !sk_ipv6only) 12581da177e4SLinus Torvalds return 1; 12591da177e4SLinus Torvalds 12601da177e4SLinus Torvalds if (addr_type2 == IPV6_ADDR_ANY && 12611da177e4SLinus Torvalds !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) 12621da177e4SLinus Torvalds return 1; 12631da177e4SLinus Torvalds 12641da177e4SLinus Torvalds if (addr_type == IPV6_ADDR_ANY && 12651da177e4SLinus Torvalds !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) 12661da177e4SLinus Torvalds return 1; 12671da177e4SLinus Torvalds 12681da177e4SLinus Torvalds if (sk2_rcv_saddr6 && 12691da177e4SLinus Torvalds ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) 12701da177e4SLinus Torvalds return 1; 12711da177e4SLinus Torvalds 12721da177e4SLinus Torvalds if (addr_type == IPV6_ADDR_MAPPED && 12731da177e4SLinus Torvalds !sk2_ipv6only && 12741da177e4SLinus Torvalds (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr)) 12751da177e4SLinus Torvalds return 1; 12761da177e4SLinus Torvalds 12771da177e4SLinus Torvalds return 0; 12781da177e4SLinus Torvalds } 12791da177e4SLinus Torvalds 12801da177e4SLinus Torvalds /* Gets referenced address, destroys ifaddr */ 12811da177e4SLinus Torvalds 12829f5336e2SAdrian Bunk static void addrconf_dad_stop(struct inet6_ifaddr *ifp) 12831da177e4SLinus Torvalds { 12841da177e4SLinus Torvalds if (ifp->flags&IFA_F_PERMANENT) { 12851da177e4SLinus Torvalds spin_lock_bh(&ifp->lock); 12861da177e4SLinus Torvalds addrconf_del_timer(ifp); 12871da177e4SLinus Torvalds ifp->flags |= IFA_F_TENTATIVE; 12881da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 12891da177e4SLinus Torvalds in6_ifa_put(ifp); 12901da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 12911da177e4SLinus Torvalds } else if (ifp->flags&IFA_F_TEMPORARY) { 12921da177e4SLinus Torvalds struct inet6_ifaddr *ifpub; 12931da177e4SLinus Torvalds spin_lock_bh(&ifp->lock); 12941da177e4SLinus Torvalds ifpub = ifp->ifpub; 12951da177e4SLinus Torvalds if (ifpub) { 12961da177e4SLinus Torvalds in6_ifa_hold(ifpub); 12971da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 12981da177e4SLinus Torvalds ipv6_create_tempaddr(ifpub, ifp); 12991da177e4SLinus Torvalds in6_ifa_put(ifpub); 13001da177e4SLinus Torvalds } else { 13011da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 13021da177e4SLinus Torvalds } 13031da177e4SLinus Torvalds ipv6_del_addr(ifp); 13041da177e4SLinus Torvalds #endif 13051da177e4SLinus Torvalds } else 13061da177e4SLinus Torvalds ipv6_del_addr(ifp); 13071da177e4SLinus Torvalds } 13081da177e4SLinus Torvalds 13093c21edbdSYOSHIFUJI Hideaki void addrconf_dad_failure(struct inet6_ifaddr *ifp) 13103c21edbdSYOSHIFUJI Hideaki { 13113c21edbdSYOSHIFUJI Hideaki if (net_ratelimit()) 13123c21edbdSYOSHIFUJI Hideaki printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name); 13133c21edbdSYOSHIFUJI Hideaki addrconf_dad_stop(ifp); 13143c21edbdSYOSHIFUJI Hideaki } 13151da177e4SLinus Torvalds 13161da177e4SLinus Torvalds /* Join to solicited addr multicast group. */ 13171da177e4SLinus Torvalds 13181da177e4SLinus Torvalds void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) 13191da177e4SLinus Torvalds { 13201da177e4SLinus Torvalds struct in6_addr maddr; 13211da177e4SLinus Torvalds 13221da177e4SLinus Torvalds if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) 13231da177e4SLinus Torvalds return; 13241da177e4SLinus Torvalds 13251da177e4SLinus Torvalds addrconf_addr_solict_mult(addr, &maddr); 13261da177e4SLinus Torvalds ipv6_dev_mc_inc(dev, &maddr); 13271da177e4SLinus Torvalds } 13281da177e4SLinus Torvalds 13291da177e4SLinus Torvalds void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) 13301da177e4SLinus Torvalds { 13311da177e4SLinus Torvalds struct in6_addr maddr; 13321da177e4SLinus Torvalds 13331da177e4SLinus Torvalds if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) 13341da177e4SLinus Torvalds return; 13351da177e4SLinus Torvalds 13361da177e4SLinus Torvalds addrconf_addr_solict_mult(addr, &maddr); 13371da177e4SLinus Torvalds __ipv6_dev_mc_dec(idev, &maddr); 13381da177e4SLinus Torvalds } 13391da177e4SLinus Torvalds 134020380731SArnaldo Carvalho de Melo static void addrconf_join_anycast(struct inet6_ifaddr *ifp) 13411da177e4SLinus Torvalds { 13421da177e4SLinus Torvalds struct in6_addr addr; 13431da177e4SLinus Torvalds ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); 13441da177e4SLinus Torvalds if (ipv6_addr_any(&addr)) 13451da177e4SLinus Torvalds return; 13461da177e4SLinus Torvalds ipv6_dev_ac_inc(ifp->idev->dev, &addr); 13471da177e4SLinus Torvalds } 13481da177e4SLinus Torvalds 134920380731SArnaldo Carvalho de Melo static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) 13501da177e4SLinus Torvalds { 13511da177e4SLinus Torvalds struct in6_addr addr; 13521da177e4SLinus Torvalds ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); 13531da177e4SLinus Torvalds if (ipv6_addr_any(&addr)) 13541da177e4SLinus Torvalds return; 13551da177e4SLinus Torvalds __ipv6_dev_ac_dec(ifp->idev, &addr); 13561da177e4SLinus Torvalds } 13571da177e4SLinus Torvalds 1358073a8e0eSYOSHIFUJI Hideaki static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) 13591da177e4SLinus Torvalds { 13601da177e4SLinus Torvalds if (dev->addr_len != ETH_ALEN) 13611da177e4SLinus Torvalds return -1; 13621da177e4SLinus Torvalds memcpy(eui, dev->dev_addr, 3); 13631da177e4SLinus Torvalds memcpy(eui + 5, dev->dev_addr + 3, 3); 13641da177e4SLinus Torvalds 13651da177e4SLinus Torvalds /* 13661da177e4SLinus Torvalds * The zSeries OSA network cards can be shared among various 13671da177e4SLinus Torvalds * OS instances, but the OSA cards have only one MAC address. 13681da177e4SLinus Torvalds * This leads to duplicate address conflicts in conjunction 13691da177e4SLinus Torvalds * with IPv6 if more than one instance uses the same card. 13701da177e4SLinus Torvalds * 13711da177e4SLinus Torvalds * The driver for these cards can deliver a unique 16-bit 13721da177e4SLinus Torvalds * identifier for each instance sharing the same card. It is 13731da177e4SLinus Torvalds * placed instead of 0xFFFE in the interface identifier. The 13741da177e4SLinus Torvalds * "u" bit of the interface identifier is not inverted in this 13751da177e4SLinus Torvalds * case. Hence the resulting interface identifier has local 13761da177e4SLinus Torvalds * scope according to RFC2373. 13771da177e4SLinus Torvalds */ 13781da177e4SLinus Torvalds if (dev->dev_id) { 13791da177e4SLinus Torvalds eui[3] = (dev->dev_id >> 8) & 0xFF; 13801da177e4SLinus Torvalds eui[4] = dev->dev_id & 0xFF; 13811da177e4SLinus Torvalds } else { 13821da177e4SLinus Torvalds eui[3] = 0xFF; 13831da177e4SLinus Torvalds eui[4] = 0xFE; 13841da177e4SLinus Torvalds eui[0] ^= 2; 13851da177e4SLinus Torvalds } 13861da177e4SLinus Torvalds return 0; 1387073a8e0eSYOSHIFUJI Hideaki } 1388073a8e0eSYOSHIFUJI Hideaki 1389073a8e0eSYOSHIFUJI Hideaki static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) 1390073a8e0eSYOSHIFUJI Hideaki { 13911da177e4SLinus Torvalds /* XXX: inherit EUI-64 from other interface -- yoshfuji */ 13921da177e4SLinus Torvalds if (dev->addr_len != ARCNET_ALEN) 13931da177e4SLinus Torvalds return -1; 13941da177e4SLinus Torvalds memset(eui, 0, 7); 13951da177e4SLinus Torvalds eui[7] = *(u8*)dev->dev_addr; 13961da177e4SLinus Torvalds return 0; 1397073a8e0eSYOSHIFUJI Hideaki } 1398073a8e0eSYOSHIFUJI Hideaki 1399073a8e0eSYOSHIFUJI Hideaki static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) 1400073a8e0eSYOSHIFUJI Hideaki { 14011da177e4SLinus Torvalds if (dev->addr_len != INFINIBAND_ALEN) 14021da177e4SLinus Torvalds return -1; 14031da177e4SLinus Torvalds memcpy(eui, dev->dev_addr + 12, 8); 14041da177e4SLinus Torvalds eui[0] |= 2; 14051da177e4SLinus Torvalds return 0; 14061da177e4SLinus Torvalds } 1407073a8e0eSYOSHIFUJI Hideaki 1408073a8e0eSYOSHIFUJI Hideaki static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) 1409073a8e0eSYOSHIFUJI Hideaki { 1410073a8e0eSYOSHIFUJI Hideaki switch (dev->type) { 1411073a8e0eSYOSHIFUJI Hideaki case ARPHRD_ETHER: 1412073a8e0eSYOSHIFUJI Hideaki case ARPHRD_FDDI: 1413073a8e0eSYOSHIFUJI Hideaki case ARPHRD_IEEE802_TR: 1414073a8e0eSYOSHIFUJI Hideaki return addrconf_ifid_eui48(eui, dev); 1415073a8e0eSYOSHIFUJI Hideaki case ARPHRD_ARCNET: 1416073a8e0eSYOSHIFUJI Hideaki return addrconf_ifid_arcnet(eui, dev); 1417073a8e0eSYOSHIFUJI Hideaki case ARPHRD_INFINIBAND: 1418073a8e0eSYOSHIFUJI Hideaki return addrconf_ifid_infiniband(eui, dev); 1419c7dc89c0SFred L. Templin case ARPHRD_SIT: 1420c7dc89c0SFred L. Templin if (dev->priv_flags & IFF_ISATAP) 1421c7dc89c0SFred L. Templin return ipv6_isatap_eui64(eui, *(__be32 *)dev->dev_addr); 1422073a8e0eSYOSHIFUJI Hideaki } 14231da177e4SLinus Torvalds return -1; 14241da177e4SLinus Torvalds } 14251da177e4SLinus Torvalds 14261da177e4SLinus Torvalds static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) 14271da177e4SLinus Torvalds { 14281da177e4SLinus Torvalds int err = -1; 14291da177e4SLinus Torvalds struct inet6_ifaddr *ifp; 14301da177e4SLinus Torvalds 14311da177e4SLinus Torvalds read_lock_bh(&idev->lock); 14321da177e4SLinus Torvalds for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { 14331da177e4SLinus Torvalds if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { 14341da177e4SLinus Torvalds memcpy(eui, ifp->addr.s6_addr+8, 8); 14351da177e4SLinus Torvalds err = 0; 14361da177e4SLinus Torvalds break; 14371da177e4SLinus Torvalds } 14381da177e4SLinus Torvalds } 14391da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 14401da177e4SLinus Torvalds return err; 14411da177e4SLinus Torvalds } 14421da177e4SLinus Torvalds 14431da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 14441da177e4SLinus Torvalds /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ 14451da177e4SLinus Torvalds static int __ipv6_regen_rndid(struct inet6_dev *idev) 14461da177e4SLinus Torvalds { 14471da177e4SLinus Torvalds regen: 1448955189efSYOSHIFUJI Hideaki get_random_bytes(idev->rndid, sizeof(idev->rndid)); 14491da177e4SLinus Torvalds idev->rndid[0] &= ~0x02; 14501da177e4SLinus Torvalds 14511da177e4SLinus Torvalds /* 14521da177e4SLinus Torvalds * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: 14531da177e4SLinus Torvalds * check if generated address is not inappropriate 14541da177e4SLinus Torvalds * 14551da177e4SLinus Torvalds * - Reserved subnet anycast (RFC 2526) 14561da177e4SLinus Torvalds * 11111101 11....11 1xxxxxxx 1457c7dc89c0SFred L. Templin * - ISATAP (RFC4214) 6.1 14581da177e4SLinus Torvalds * 00-00-5E-FE-xx-xx-xx-xx 14591da177e4SLinus Torvalds * - value 0 14601da177e4SLinus Torvalds * - XXX: already assigned to an address on the device 14611da177e4SLinus Torvalds */ 14621da177e4SLinus Torvalds if (idev->rndid[0] == 0xfd && 14631da177e4SLinus Torvalds (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && 14641da177e4SLinus Torvalds (idev->rndid[7]&0x80)) 14651da177e4SLinus Torvalds goto regen; 14661da177e4SLinus Torvalds if ((idev->rndid[0]|idev->rndid[1]) == 0) { 14671da177e4SLinus Torvalds if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) 14681da177e4SLinus Torvalds goto regen; 14691da177e4SLinus Torvalds if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) 14701da177e4SLinus Torvalds goto regen; 14711da177e4SLinus Torvalds } 14721da177e4SLinus Torvalds 14731da177e4SLinus Torvalds return 0; 14741da177e4SLinus Torvalds } 14751da177e4SLinus Torvalds 14761da177e4SLinus Torvalds static void ipv6_regen_rndid(unsigned long data) 14771da177e4SLinus Torvalds { 14781da177e4SLinus Torvalds struct inet6_dev *idev = (struct inet6_dev *) data; 14791da177e4SLinus Torvalds unsigned long expires; 14801da177e4SLinus Torvalds 14818814c4b5SYOSHIFUJI Hideaki rcu_read_lock_bh(); 14821da177e4SLinus Torvalds write_lock_bh(&idev->lock); 14831da177e4SLinus Torvalds 14841da177e4SLinus Torvalds if (idev->dead) 14851da177e4SLinus Torvalds goto out; 14861da177e4SLinus Torvalds 14871da177e4SLinus Torvalds if (__ipv6_regen_rndid(idev) < 0) 14881da177e4SLinus Torvalds goto out; 14891da177e4SLinus Torvalds 14901da177e4SLinus Torvalds expires = jiffies + 14911da177e4SLinus Torvalds idev->cnf.temp_prefered_lft * HZ - 14921da177e4SLinus Torvalds idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; 14931da177e4SLinus Torvalds if (time_before(expires, jiffies)) { 14941da177e4SLinus Torvalds printk(KERN_WARNING 14951da177e4SLinus Torvalds "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", 14961da177e4SLinus Torvalds idev->dev->name); 14971da177e4SLinus Torvalds goto out; 14981da177e4SLinus Torvalds } 14991da177e4SLinus Torvalds 15001da177e4SLinus Torvalds if (!mod_timer(&idev->regen_timer, expires)) 15011da177e4SLinus Torvalds in6_dev_hold(idev); 15021da177e4SLinus Torvalds 15031da177e4SLinus Torvalds out: 15041da177e4SLinus Torvalds write_unlock_bh(&idev->lock); 15058814c4b5SYOSHIFUJI Hideaki rcu_read_unlock_bh(); 15061da177e4SLinus Torvalds in6_dev_put(idev); 15071da177e4SLinus Torvalds } 15081da177e4SLinus Torvalds 15091da177e4SLinus Torvalds static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { 15101da177e4SLinus Torvalds int ret = 0; 15111da177e4SLinus Torvalds 15121da177e4SLinus Torvalds if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) 15131da177e4SLinus Torvalds ret = __ipv6_regen_rndid(idev); 15141da177e4SLinus Torvalds return ret; 15151da177e4SLinus Torvalds } 15161da177e4SLinus Torvalds #endif 15171da177e4SLinus Torvalds 15181da177e4SLinus Torvalds /* 15191da177e4SLinus Torvalds * Add prefix route. 15201da177e4SLinus Torvalds */ 15211da177e4SLinus Torvalds 15221da177e4SLinus Torvalds static void 15231da177e4SLinus Torvalds addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, 1524e431b8c0SJamal Hadi Salim unsigned long expires, u32 flags) 15251da177e4SLinus Torvalds { 152686872cb5SThomas Graf struct fib6_config cfg = { 152786872cb5SThomas Graf .fc_table = RT6_TABLE_PREFIX, 152886872cb5SThomas Graf .fc_metric = IP6_RT_PRIO_ADDRCONF, 152986872cb5SThomas Graf .fc_ifindex = dev->ifindex, 153086872cb5SThomas Graf .fc_expires = expires, 153186872cb5SThomas Graf .fc_dst_len = plen, 153286872cb5SThomas Graf .fc_flags = RTF_UP | flags, 153386872cb5SThomas Graf }; 15341da177e4SLinus Torvalds 153586872cb5SThomas Graf ipv6_addr_copy(&cfg.fc_dst, pfx); 15361da177e4SLinus Torvalds 15371da177e4SLinus Torvalds /* Prevent useless cloning on PtP SIT. 15381da177e4SLinus Torvalds This thing is done here expecting that the whole 15391da177e4SLinus Torvalds class of non-broadcast devices need not cloning. 15401da177e4SLinus Torvalds */ 15410be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) 15421da177e4SLinus Torvalds if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) 154386872cb5SThomas Graf cfg.fc_flags |= RTF_NONEXTHOP; 15440be669bbSJoerg Roedel #endif 15451da177e4SLinus Torvalds 154686872cb5SThomas Graf ip6_route_add(&cfg); 15471da177e4SLinus Torvalds } 15481da177e4SLinus Torvalds 15491da177e4SLinus Torvalds /* Create "default" multicast route to the interface */ 15501da177e4SLinus Torvalds 15511da177e4SLinus Torvalds static void addrconf_add_mroute(struct net_device *dev) 15521da177e4SLinus Torvalds { 155386872cb5SThomas Graf struct fib6_config cfg = { 155486872cb5SThomas Graf .fc_table = RT6_TABLE_LOCAL, 155586872cb5SThomas Graf .fc_metric = IP6_RT_PRIO_ADDRCONF, 155686872cb5SThomas Graf .fc_ifindex = dev->ifindex, 155786872cb5SThomas Graf .fc_dst_len = 8, 155886872cb5SThomas Graf .fc_flags = RTF_UP, 155986872cb5SThomas Graf }; 15601da177e4SLinus Torvalds 156186872cb5SThomas Graf ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); 156286872cb5SThomas Graf 156386872cb5SThomas Graf ip6_route_add(&cfg); 15641da177e4SLinus Torvalds } 15651da177e4SLinus Torvalds 15660be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) 15671da177e4SLinus Torvalds static void sit_route_add(struct net_device *dev) 15681da177e4SLinus Torvalds { 156986872cb5SThomas Graf struct fib6_config cfg = { 157086872cb5SThomas Graf .fc_table = RT6_TABLE_MAIN, 157186872cb5SThomas Graf .fc_metric = IP6_RT_PRIO_ADDRCONF, 157286872cb5SThomas Graf .fc_ifindex = dev->ifindex, 157386872cb5SThomas Graf .fc_dst_len = 96, 157486872cb5SThomas Graf .fc_flags = RTF_UP | RTF_NONEXTHOP, 157586872cb5SThomas Graf }; 15761da177e4SLinus Torvalds 15771da177e4SLinus Torvalds /* prefix length - 96 bits "::d.d.d.d" */ 157886872cb5SThomas Graf ip6_route_add(&cfg); 15791da177e4SLinus Torvalds } 15800be669bbSJoerg Roedel #endif 15811da177e4SLinus Torvalds 15821da177e4SLinus Torvalds static void addrconf_add_lroute(struct net_device *dev) 15831da177e4SLinus Torvalds { 15841da177e4SLinus Torvalds struct in6_addr addr; 15851da177e4SLinus Torvalds 15861da177e4SLinus Torvalds ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); 15871da177e4SLinus Torvalds addrconf_prefix_route(&addr, 64, dev, 0, 0); 15881da177e4SLinus Torvalds } 15891da177e4SLinus Torvalds 15901da177e4SLinus Torvalds static struct inet6_dev *addrconf_add_dev(struct net_device *dev) 15911da177e4SLinus Torvalds { 15921da177e4SLinus Torvalds struct inet6_dev *idev; 15931da177e4SLinus Torvalds 15941da177e4SLinus Torvalds ASSERT_RTNL(); 15951da177e4SLinus Torvalds 15961da177e4SLinus Torvalds if ((idev = ipv6_find_idev(dev)) == NULL) 15971da177e4SLinus Torvalds return NULL; 15981da177e4SLinus Torvalds 15991da177e4SLinus Torvalds /* Add default multicast route */ 16001da177e4SLinus Torvalds addrconf_add_mroute(dev); 16011da177e4SLinus Torvalds 16021da177e4SLinus Torvalds /* Add link local route */ 16031da177e4SLinus Torvalds addrconf_add_lroute(dev); 16041da177e4SLinus Torvalds return idev; 16051da177e4SLinus Torvalds } 16061da177e4SLinus Torvalds 16071da177e4SLinus Torvalds void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) 16081da177e4SLinus Torvalds { 16091da177e4SLinus Torvalds struct prefix_info *pinfo; 16101da177e4SLinus Torvalds __u32 valid_lft; 16111da177e4SLinus Torvalds __u32 prefered_lft; 16121da177e4SLinus Torvalds int addr_type; 16131da177e4SLinus Torvalds unsigned long rt_expires; 16141da177e4SLinus Torvalds struct inet6_dev *in6_dev; 16151da177e4SLinus Torvalds 16161da177e4SLinus Torvalds pinfo = (struct prefix_info *) opt; 16171da177e4SLinus Torvalds 16181da177e4SLinus Torvalds if (len < sizeof(struct prefix_info)) { 16191da177e4SLinus Torvalds ADBG(("addrconf: prefix option too short\n")); 16201da177e4SLinus Torvalds return; 16211da177e4SLinus Torvalds } 16221da177e4SLinus Torvalds 16231da177e4SLinus Torvalds /* 16241da177e4SLinus Torvalds * Validation checks ([ADDRCONF], page 19) 16251da177e4SLinus Torvalds */ 16261da177e4SLinus Torvalds 16271da177e4SLinus Torvalds addr_type = ipv6_addr_type(&pinfo->prefix); 16281da177e4SLinus Torvalds 16291da177e4SLinus Torvalds if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) 16301da177e4SLinus Torvalds return; 16311da177e4SLinus Torvalds 16321da177e4SLinus Torvalds valid_lft = ntohl(pinfo->valid); 16331da177e4SLinus Torvalds prefered_lft = ntohl(pinfo->prefered); 16341da177e4SLinus Torvalds 16351da177e4SLinus Torvalds if (prefered_lft > valid_lft) { 16361da177e4SLinus Torvalds if (net_ratelimit()) 16371da177e4SLinus Torvalds printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); 16381da177e4SLinus Torvalds return; 16391da177e4SLinus Torvalds } 16401da177e4SLinus Torvalds 16411da177e4SLinus Torvalds in6_dev = in6_dev_get(dev); 16421da177e4SLinus Torvalds 16431da177e4SLinus Torvalds if (in6_dev == NULL) { 16441da177e4SLinus Torvalds if (net_ratelimit()) 16451da177e4SLinus Torvalds printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); 16461da177e4SLinus Torvalds return; 16471da177e4SLinus Torvalds } 16481da177e4SLinus Torvalds 16491da177e4SLinus Torvalds /* 16501da177e4SLinus Torvalds * Two things going on here: 16511da177e4SLinus Torvalds * 1) Add routes for on-link prefixes 16521da177e4SLinus Torvalds * 2) Configure prefixes with the auto flag set 16531da177e4SLinus Torvalds */ 16541da177e4SLinus Torvalds 16551da177e4SLinus Torvalds /* Avoid arithmetic overflow. Really, we could 16561da177e4SLinus Torvalds save rt_expires in seconds, likely valid_lft, 16571da177e4SLinus Torvalds but it would require division in fib gc, that it 16581da177e4SLinus Torvalds not good. 16591da177e4SLinus Torvalds */ 16601da177e4SLinus Torvalds if (valid_lft >= 0x7FFFFFFF/HZ) 16613dd4bc68SYOSHIFUJI Hideaki rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ); 16621da177e4SLinus Torvalds else 16633dd4bc68SYOSHIFUJI Hideaki rt_expires = valid_lft * HZ; 16643dd4bc68SYOSHIFUJI Hideaki 16653dd4bc68SYOSHIFUJI Hideaki /* 16663dd4bc68SYOSHIFUJI Hideaki * We convert this (in jiffies) to clock_t later. 16673dd4bc68SYOSHIFUJI Hideaki * Avoid arithmetic overflow there as well. 16683dd4bc68SYOSHIFUJI Hideaki * Overflow can happen only if HZ < USER_HZ. 16693dd4bc68SYOSHIFUJI Hideaki */ 16703dd4bc68SYOSHIFUJI Hideaki if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ) 16713dd4bc68SYOSHIFUJI Hideaki rt_expires = 0x7FFFFFFF / USER_HZ; 16721da177e4SLinus Torvalds 16731da177e4SLinus Torvalds if (pinfo->onlink) { 16741da177e4SLinus Torvalds struct rt6_info *rt; 16751da177e4SLinus Torvalds rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1); 16761da177e4SLinus Torvalds 16771da177e4SLinus Torvalds if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { 16781da177e4SLinus Torvalds if (rt->rt6i_flags&RTF_EXPIRES) { 16791da177e4SLinus Torvalds if (valid_lft == 0) { 1680e0a1ad73SThomas Graf ip6_del_rt(rt); 16811da177e4SLinus Torvalds rt = NULL; 16821da177e4SLinus Torvalds } else { 16833dd4bc68SYOSHIFUJI Hideaki rt->rt6i_expires = jiffies + rt_expires; 16841da177e4SLinus Torvalds } 16851da177e4SLinus Torvalds } 16861da177e4SLinus Torvalds } else if (valid_lft) { 16871da177e4SLinus Torvalds addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, 16883dd4bc68SYOSHIFUJI Hideaki dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT); 16891da177e4SLinus Torvalds } 16901da177e4SLinus Torvalds if (rt) 16911da177e4SLinus Torvalds dst_release(&rt->u.dst); 16921da177e4SLinus Torvalds } 16931da177e4SLinus Torvalds 16941da177e4SLinus Torvalds /* Try to figure out our local address for this prefix */ 16951da177e4SLinus Torvalds 16961da177e4SLinus Torvalds if (pinfo->autoconf && in6_dev->cnf.autoconf) { 16971da177e4SLinus Torvalds struct inet6_ifaddr * ifp; 16981da177e4SLinus Torvalds struct in6_addr addr; 16991da177e4SLinus Torvalds int create = 0, update_lft = 0; 17001da177e4SLinus Torvalds 17011da177e4SLinus Torvalds if (pinfo->prefix_len == 64) { 17021da177e4SLinus Torvalds memcpy(&addr, &pinfo->prefix, 8); 17031da177e4SLinus Torvalds if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && 17041da177e4SLinus Torvalds ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { 17051da177e4SLinus Torvalds in6_dev_put(in6_dev); 17061da177e4SLinus Torvalds return; 17071da177e4SLinus Torvalds } 17081da177e4SLinus Torvalds goto ok; 17091da177e4SLinus Torvalds } 17101da177e4SLinus Torvalds if (net_ratelimit()) 17111da177e4SLinus Torvalds printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", 17121da177e4SLinus Torvalds pinfo->prefix_len); 17131da177e4SLinus Torvalds in6_dev_put(in6_dev); 17141da177e4SLinus Torvalds return; 17151da177e4SLinus Torvalds 17161da177e4SLinus Torvalds ok: 17171da177e4SLinus Torvalds 17181da177e4SLinus Torvalds ifp = ipv6_get_ifaddr(&addr, dev, 1); 17191da177e4SLinus Torvalds 17201da177e4SLinus Torvalds if (ifp == NULL && valid_lft) { 17211da177e4SLinus Torvalds int max_addresses = in6_dev->cnf.max_addresses; 172295c385b4SNeil Horman u32 addr_flags = 0; 172395c385b4SNeil Horman 172495c385b4SNeil Horman #ifdef CONFIG_IPV6_OPTIMISTIC_DAD 172595c385b4SNeil Horman if (in6_dev->cnf.optimistic_dad && 172695c385b4SNeil Horman !ipv6_devconf.forwarding) 172795c385b4SNeil Horman addr_flags = IFA_F_OPTIMISTIC; 172895c385b4SNeil Horman #endif 17291da177e4SLinus Torvalds 17301da177e4SLinus Torvalds /* Do not allow to create too much of autoconfigured 17311da177e4SLinus Torvalds * addresses; this would be too easy way to crash kernel. 17321da177e4SLinus Torvalds */ 17331da177e4SLinus Torvalds if (!max_addresses || 17341da177e4SLinus Torvalds ipv6_count_addresses(in6_dev) < max_addresses) 17351da177e4SLinus Torvalds ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, 173695c385b4SNeil Horman addr_type&IPV6_ADDR_SCOPE_MASK, 173795c385b4SNeil Horman addr_flags); 17381da177e4SLinus Torvalds 17391da177e4SLinus Torvalds if (!ifp || IS_ERR(ifp)) { 17401da177e4SLinus Torvalds in6_dev_put(in6_dev); 17411da177e4SLinus Torvalds return; 17421da177e4SLinus Torvalds } 17431da177e4SLinus Torvalds 17441da177e4SLinus Torvalds update_lft = create = 1; 17451da177e4SLinus Torvalds ifp->cstamp = jiffies; 17461da177e4SLinus Torvalds addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); 17471da177e4SLinus Torvalds } 17481da177e4SLinus Torvalds 17491da177e4SLinus Torvalds if (ifp) { 17501da177e4SLinus Torvalds int flags; 17511da177e4SLinus Torvalds unsigned long now; 17521da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 17531da177e4SLinus Torvalds struct inet6_ifaddr *ift; 17541da177e4SLinus Torvalds #endif 17551da177e4SLinus Torvalds u32 stored_lft; 17561da177e4SLinus Torvalds 17571da177e4SLinus Torvalds /* update lifetime (RFC2462 5.5.3 e) */ 17581da177e4SLinus Torvalds spin_lock(&ifp->lock); 17591da177e4SLinus Torvalds now = jiffies; 17601da177e4SLinus Torvalds if (ifp->valid_lft > (now - ifp->tstamp) / HZ) 17611da177e4SLinus Torvalds stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; 17621da177e4SLinus Torvalds else 17631da177e4SLinus Torvalds stored_lft = 0; 17641da177e4SLinus Torvalds if (!update_lft && stored_lft) { 17651da177e4SLinus Torvalds if (valid_lft > MIN_VALID_LIFETIME || 17661da177e4SLinus Torvalds valid_lft > stored_lft) 17671da177e4SLinus Torvalds update_lft = 1; 17681da177e4SLinus Torvalds else if (stored_lft <= MIN_VALID_LIFETIME) { 17691da177e4SLinus Torvalds /* valid_lft <= stored_lft is always true */ 17701da177e4SLinus Torvalds /* XXX: IPsec */ 17711da177e4SLinus Torvalds update_lft = 0; 17721da177e4SLinus Torvalds } else { 17731da177e4SLinus Torvalds valid_lft = MIN_VALID_LIFETIME; 17741da177e4SLinus Torvalds if (valid_lft < prefered_lft) 17751da177e4SLinus Torvalds prefered_lft = valid_lft; 17761da177e4SLinus Torvalds update_lft = 1; 17771da177e4SLinus Torvalds } 17781da177e4SLinus Torvalds } 17791da177e4SLinus Torvalds 17801da177e4SLinus Torvalds if (update_lft) { 17811da177e4SLinus Torvalds ifp->valid_lft = valid_lft; 17821da177e4SLinus Torvalds ifp->prefered_lft = prefered_lft; 17831da177e4SLinus Torvalds ifp->tstamp = now; 17841da177e4SLinus Torvalds flags = ifp->flags; 17851da177e4SLinus Torvalds ifp->flags &= ~IFA_F_DEPRECATED; 17861da177e4SLinus Torvalds spin_unlock(&ifp->lock); 17871da177e4SLinus Torvalds 17881da177e4SLinus Torvalds if (!(flags&IFA_F_TENTATIVE)) 17891da177e4SLinus Torvalds ipv6_ifa_notify(0, ifp); 17901da177e4SLinus Torvalds } else 17911da177e4SLinus Torvalds spin_unlock(&ifp->lock); 17921da177e4SLinus Torvalds 17931da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 17941da177e4SLinus Torvalds read_lock_bh(&in6_dev->lock); 17951da177e4SLinus Torvalds /* update all temporary addresses in the list */ 17961da177e4SLinus Torvalds for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) { 17971da177e4SLinus Torvalds /* 17981da177e4SLinus Torvalds * When adjusting the lifetimes of an existing 17991da177e4SLinus Torvalds * temporary address, only lower the lifetimes. 18001da177e4SLinus Torvalds * Implementations must not increase the 18011da177e4SLinus Torvalds * lifetimes of an existing temporary address 18021da177e4SLinus Torvalds * when processing a Prefix Information Option. 18031da177e4SLinus Torvalds */ 18041da177e4SLinus Torvalds spin_lock(&ift->lock); 18051da177e4SLinus Torvalds flags = ift->flags; 18061da177e4SLinus Torvalds if (ift->valid_lft > valid_lft && 18071da177e4SLinus Torvalds ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) 18081da177e4SLinus Torvalds ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; 18091da177e4SLinus Torvalds if (ift->prefered_lft > prefered_lft && 18101da177e4SLinus Torvalds ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) 18111da177e4SLinus Torvalds ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; 18121da177e4SLinus Torvalds spin_unlock(&ift->lock); 18131da177e4SLinus Torvalds if (!(flags&IFA_F_TENTATIVE)) 18141da177e4SLinus Torvalds ipv6_ifa_notify(0, ift); 18151da177e4SLinus Torvalds } 18161da177e4SLinus Torvalds 18171da177e4SLinus Torvalds if (create && in6_dev->cnf.use_tempaddr > 0) { 18181da177e4SLinus Torvalds /* 18191da177e4SLinus Torvalds * When a new public address is created as described in [ADDRCONF], 18201da177e4SLinus Torvalds * also create a new temporary address. 18211da177e4SLinus Torvalds */ 18221da177e4SLinus Torvalds read_unlock_bh(&in6_dev->lock); 18231da177e4SLinus Torvalds ipv6_create_tempaddr(ifp, NULL); 18241da177e4SLinus Torvalds } else { 18251da177e4SLinus Torvalds read_unlock_bh(&in6_dev->lock); 18261da177e4SLinus Torvalds } 18271da177e4SLinus Torvalds #endif 18281da177e4SLinus Torvalds in6_ifa_put(ifp); 18291da177e4SLinus Torvalds addrconf_verify(0); 18301da177e4SLinus Torvalds } 18311da177e4SLinus Torvalds } 18321da177e4SLinus Torvalds inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); 18331da177e4SLinus Torvalds in6_dev_put(in6_dev); 18341da177e4SLinus Torvalds } 18351da177e4SLinus Torvalds 18361da177e4SLinus Torvalds /* 18371da177e4SLinus Torvalds * Set destination address. 18381da177e4SLinus Torvalds * Special case for SIT interfaces where we create a new "virtual" 18391da177e4SLinus Torvalds * device. 18401da177e4SLinus Torvalds */ 18411da177e4SLinus Torvalds int addrconf_set_dstaddr(void __user *arg) 18421da177e4SLinus Torvalds { 18431da177e4SLinus Torvalds struct in6_ifreq ireq; 18441da177e4SLinus Torvalds struct net_device *dev; 18451da177e4SLinus Torvalds int err = -EINVAL; 18461da177e4SLinus Torvalds 18471da177e4SLinus Torvalds rtnl_lock(); 18481da177e4SLinus Torvalds 18491da177e4SLinus Torvalds err = -EFAULT; 18501da177e4SLinus Torvalds if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) 18511da177e4SLinus Torvalds goto err_exit; 18521da177e4SLinus Torvalds 1853881d966bSEric W. Biederman dev = __dev_get_by_index(&init_net, ireq.ifr6_ifindex); 18541da177e4SLinus Torvalds 18551da177e4SLinus Torvalds err = -ENODEV; 18561da177e4SLinus Torvalds if (dev == NULL) 18571da177e4SLinus Torvalds goto err_exit; 18581da177e4SLinus Torvalds 18590be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) 18601da177e4SLinus Torvalds if (dev->type == ARPHRD_SIT) { 18611da177e4SLinus Torvalds struct ifreq ifr; 18621da177e4SLinus Torvalds mm_segment_t oldfs; 18631da177e4SLinus Torvalds struct ip_tunnel_parm p; 18641da177e4SLinus Torvalds 18651da177e4SLinus Torvalds err = -EADDRNOTAVAIL; 18661da177e4SLinus Torvalds if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) 18671da177e4SLinus Torvalds goto err_exit; 18681da177e4SLinus Torvalds 18691da177e4SLinus Torvalds memset(&p, 0, sizeof(p)); 18701da177e4SLinus Torvalds p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; 18711da177e4SLinus Torvalds p.iph.saddr = 0; 18721da177e4SLinus Torvalds p.iph.version = 4; 18731da177e4SLinus Torvalds p.iph.ihl = 5; 18741da177e4SLinus Torvalds p.iph.protocol = IPPROTO_IPV6; 18751da177e4SLinus Torvalds p.iph.ttl = 64; 18761da177e4SLinus Torvalds ifr.ifr_ifru.ifru_data = (void __user *)&p; 18771da177e4SLinus Torvalds 18781da177e4SLinus Torvalds oldfs = get_fs(); set_fs(KERNEL_DS); 18791da177e4SLinus Torvalds err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL); 18801da177e4SLinus Torvalds set_fs(oldfs); 18811da177e4SLinus Torvalds 18821da177e4SLinus Torvalds if (err == 0) { 18831da177e4SLinus Torvalds err = -ENOBUFS; 1884881d966bSEric W. Biederman if ((dev = __dev_get_by_name(&init_net, p.name)) == NULL) 18851da177e4SLinus Torvalds goto err_exit; 18861da177e4SLinus Torvalds err = dev_open(dev); 18871da177e4SLinus Torvalds } 18881da177e4SLinus Torvalds } 18890be669bbSJoerg Roedel #endif 18901da177e4SLinus Torvalds 18911da177e4SLinus Torvalds err_exit: 18921da177e4SLinus Torvalds rtnl_unlock(); 18931da177e4SLinus Torvalds return err; 18941da177e4SLinus Torvalds } 18951da177e4SLinus Torvalds 18961da177e4SLinus Torvalds /* 18971da177e4SLinus Torvalds * Manual configuration of address on an interface 18981da177e4SLinus Torvalds */ 18990778769dSNoriaki TAKAMIYA static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen, 190055ebaef1SNoriaki TAKAMIYA __u8 ifa_flags, __u32 prefered_lft, __u32 valid_lft) 19011da177e4SLinus Torvalds { 19021da177e4SLinus Torvalds struct inet6_ifaddr *ifp; 19031da177e4SLinus Torvalds struct inet6_dev *idev; 19041da177e4SLinus Torvalds struct net_device *dev; 19051da177e4SLinus Torvalds int scope; 190646d48046SYOSHIFUJI Hideaki u32 flags = RTF_EXPIRES; 19071da177e4SLinus Torvalds 19081da177e4SLinus Torvalds ASSERT_RTNL(); 19091da177e4SLinus Torvalds 19100778769dSNoriaki TAKAMIYA /* check the lifetime */ 19110778769dSNoriaki TAKAMIYA if (!valid_lft || prefered_lft > valid_lft) 19120778769dSNoriaki TAKAMIYA return -EINVAL; 19130778769dSNoriaki TAKAMIYA 1914881d966bSEric W. Biederman if ((dev = __dev_get_by_index(&init_net, ifindex)) == NULL) 19151da177e4SLinus Torvalds return -ENODEV; 19161da177e4SLinus Torvalds 19171da177e4SLinus Torvalds if ((idev = addrconf_add_dev(dev)) == NULL) 19181da177e4SLinus Torvalds return -ENOBUFS; 19191da177e4SLinus Torvalds 19201da177e4SLinus Torvalds scope = ipv6_addr_scope(pfx); 19211da177e4SLinus Torvalds 192246d48046SYOSHIFUJI Hideaki if (valid_lft == INFINITY_LIFE_TIME) { 19230778769dSNoriaki TAKAMIYA ifa_flags |= IFA_F_PERMANENT; 192446d48046SYOSHIFUJI Hideaki flags = 0; 192546d48046SYOSHIFUJI Hideaki } else if (valid_lft >= 0x7FFFFFFF/HZ) 19260778769dSNoriaki TAKAMIYA valid_lft = 0x7FFFFFFF/HZ; 19270778769dSNoriaki TAKAMIYA 19280778769dSNoriaki TAKAMIYA if (prefered_lft == 0) 19290778769dSNoriaki TAKAMIYA ifa_flags |= IFA_F_DEPRECATED; 19300778769dSNoriaki TAKAMIYA else if ((prefered_lft >= 0x7FFFFFFF/HZ) && 19310778769dSNoriaki TAKAMIYA (prefered_lft != INFINITY_LIFE_TIME)) 19320778769dSNoriaki TAKAMIYA prefered_lft = 0x7FFFFFFF/HZ; 19330778769dSNoriaki TAKAMIYA 19340778769dSNoriaki TAKAMIYA ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); 19350778769dSNoriaki TAKAMIYA 19361da177e4SLinus Torvalds if (!IS_ERR(ifp)) { 193706aebfb7SHerbert Xu spin_lock_bh(&ifp->lock); 19380778769dSNoriaki TAKAMIYA ifp->valid_lft = valid_lft; 19390778769dSNoriaki TAKAMIYA ifp->prefered_lft = prefered_lft; 19400778769dSNoriaki TAKAMIYA ifp->tstamp = jiffies; 194106aebfb7SHerbert Xu spin_unlock_bh(&ifp->lock); 19420778769dSNoriaki TAKAMIYA 194346d48046SYOSHIFUJI Hideaki addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, 194446d48046SYOSHIFUJI Hideaki jiffies_to_clock_t(valid_lft * HZ), flags); 194595c385b4SNeil Horman /* 194695c385b4SNeil Horman * Note that section 3.1 of RFC 4429 indicates 194795c385b4SNeil Horman * that the Optimistic flag should not be set for 194895c385b4SNeil Horman * manually configured addresses 194995c385b4SNeil Horman */ 19501da177e4SLinus Torvalds addrconf_dad_start(ifp, 0); 19511da177e4SLinus Torvalds in6_ifa_put(ifp); 19520778769dSNoriaki TAKAMIYA addrconf_verify(0); 19531da177e4SLinus Torvalds return 0; 19541da177e4SLinus Torvalds } 19551da177e4SLinus Torvalds 19561da177e4SLinus Torvalds return PTR_ERR(ifp); 19571da177e4SLinus Torvalds } 19581da177e4SLinus Torvalds 19591da177e4SLinus Torvalds static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen) 19601da177e4SLinus Torvalds { 19611da177e4SLinus Torvalds struct inet6_ifaddr *ifp; 19621da177e4SLinus Torvalds struct inet6_dev *idev; 19631da177e4SLinus Torvalds struct net_device *dev; 19641da177e4SLinus Torvalds 1965881d966bSEric W. Biederman if ((dev = __dev_get_by_index(&init_net, ifindex)) == NULL) 19661da177e4SLinus Torvalds return -ENODEV; 19671da177e4SLinus Torvalds 19681da177e4SLinus Torvalds if ((idev = __in6_dev_get(dev)) == NULL) 19691da177e4SLinus Torvalds return -ENXIO; 19701da177e4SLinus Torvalds 19711da177e4SLinus Torvalds read_lock_bh(&idev->lock); 19721da177e4SLinus Torvalds for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) { 19731da177e4SLinus Torvalds if (ifp->prefix_len == plen && 19741da177e4SLinus Torvalds ipv6_addr_equal(pfx, &ifp->addr)) { 19751da177e4SLinus Torvalds in6_ifa_hold(ifp); 19761da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 19771da177e4SLinus Torvalds 19781da177e4SLinus Torvalds ipv6_del_addr(ifp); 19791da177e4SLinus Torvalds 19801da177e4SLinus Torvalds /* If the last address is deleted administratively, 19811da177e4SLinus Torvalds disable IPv6 on this interface. 19821da177e4SLinus Torvalds */ 19831da177e4SLinus Torvalds if (idev->addr_list == NULL) 19841da177e4SLinus Torvalds addrconf_ifdown(idev->dev, 1); 19851da177e4SLinus Torvalds return 0; 19861da177e4SLinus Torvalds } 19871da177e4SLinus Torvalds } 19881da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 19891da177e4SLinus Torvalds return -EADDRNOTAVAIL; 19901da177e4SLinus Torvalds } 19911da177e4SLinus Torvalds 19921da177e4SLinus Torvalds 19931da177e4SLinus Torvalds int addrconf_add_ifaddr(void __user *arg) 19941da177e4SLinus Torvalds { 19951da177e4SLinus Torvalds struct in6_ifreq ireq; 19961da177e4SLinus Torvalds int err; 19971da177e4SLinus Torvalds 19981da177e4SLinus Torvalds if (!capable(CAP_NET_ADMIN)) 19991da177e4SLinus Torvalds return -EPERM; 20001da177e4SLinus Torvalds 20011da177e4SLinus Torvalds if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) 20021da177e4SLinus Torvalds return -EFAULT; 20031da177e4SLinus Torvalds 20041da177e4SLinus Torvalds rtnl_lock(); 20050778769dSNoriaki TAKAMIYA err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen, 200655ebaef1SNoriaki TAKAMIYA IFA_F_PERMANENT, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); 20071da177e4SLinus Torvalds rtnl_unlock(); 20081da177e4SLinus Torvalds return err; 20091da177e4SLinus Torvalds } 20101da177e4SLinus Torvalds 20111da177e4SLinus Torvalds int addrconf_del_ifaddr(void __user *arg) 20121da177e4SLinus Torvalds { 20131da177e4SLinus Torvalds struct in6_ifreq ireq; 20141da177e4SLinus Torvalds int err; 20151da177e4SLinus Torvalds 20161da177e4SLinus Torvalds if (!capable(CAP_NET_ADMIN)) 20171da177e4SLinus Torvalds return -EPERM; 20181da177e4SLinus Torvalds 20191da177e4SLinus Torvalds if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) 20201da177e4SLinus Torvalds return -EFAULT; 20211da177e4SLinus Torvalds 20221da177e4SLinus Torvalds rtnl_lock(); 20231da177e4SLinus Torvalds err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen); 20241da177e4SLinus Torvalds rtnl_unlock(); 20251da177e4SLinus Torvalds return err; 20261da177e4SLinus Torvalds } 20271da177e4SLinus Torvalds 20280be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) 20291da177e4SLinus Torvalds static void sit_add_v4_addrs(struct inet6_dev *idev) 20301da177e4SLinus Torvalds { 20311da177e4SLinus Torvalds struct inet6_ifaddr * ifp; 20321da177e4SLinus Torvalds struct in6_addr addr; 20331da177e4SLinus Torvalds struct net_device *dev; 20341da177e4SLinus Torvalds int scope; 20351da177e4SLinus Torvalds 20361da177e4SLinus Torvalds ASSERT_RTNL(); 20371da177e4SLinus Torvalds 20381da177e4SLinus Torvalds memset(&addr, 0, sizeof(struct in6_addr)); 20391da177e4SLinus Torvalds memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); 20401da177e4SLinus Torvalds 20411da177e4SLinus Torvalds if (idev->dev->flags&IFF_POINTOPOINT) { 20421da177e4SLinus Torvalds addr.s6_addr32[0] = htonl(0xfe800000); 20431da177e4SLinus Torvalds scope = IFA_LINK; 20441da177e4SLinus Torvalds } else { 20451da177e4SLinus Torvalds scope = IPV6_ADDR_COMPATv4; 20461da177e4SLinus Torvalds } 20471da177e4SLinus Torvalds 20481da177e4SLinus Torvalds if (addr.s6_addr32[3]) { 20491da177e4SLinus Torvalds ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT); 20501da177e4SLinus Torvalds if (!IS_ERR(ifp)) { 20511da177e4SLinus Torvalds spin_lock_bh(&ifp->lock); 20521da177e4SLinus Torvalds ifp->flags &= ~IFA_F_TENTATIVE; 20531da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 20541da177e4SLinus Torvalds ipv6_ifa_notify(RTM_NEWADDR, ifp); 20551da177e4SLinus Torvalds in6_ifa_put(ifp); 20561da177e4SLinus Torvalds } 20571da177e4SLinus Torvalds return; 20581da177e4SLinus Torvalds } 20591da177e4SLinus Torvalds 2060881d966bSEric W. Biederman for_each_netdev(&init_net, dev) { 2061e5ed6399SHerbert Xu struct in_device * in_dev = __in_dev_get_rtnl(dev); 20621da177e4SLinus Torvalds if (in_dev && (dev->flags & IFF_UP)) { 20631da177e4SLinus Torvalds struct in_ifaddr * ifa; 20641da177e4SLinus Torvalds 20651da177e4SLinus Torvalds int flag = scope; 20661da177e4SLinus Torvalds 20671da177e4SLinus Torvalds for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { 20681da177e4SLinus Torvalds int plen; 20691da177e4SLinus Torvalds 20701da177e4SLinus Torvalds addr.s6_addr32[3] = ifa->ifa_local; 20711da177e4SLinus Torvalds 20721da177e4SLinus Torvalds if (ifa->ifa_scope == RT_SCOPE_LINK) 20731da177e4SLinus Torvalds continue; 20741da177e4SLinus Torvalds if (ifa->ifa_scope >= RT_SCOPE_HOST) { 20751da177e4SLinus Torvalds if (idev->dev->flags&IFF_POINTOPOINT) 20761da177e4SLinus Torvalds continue; 20771da177e4SLinus Torvalds flag |= IFA_HOST; 20781da177e4SLinus Torvalds } 20791da177e4SLinus Torvalds if (idev->dev->flags&IFF_POINTOPOINT) 20801da177e4SLinus Torvalds plen = 64; 20811da177e4SLinus Torvalds else 20821da177e4SLinus Torvalds plen = 96; 20831da177e4SLinus Torvalds 20841da177e4SLinus Torvalds ifp = ipv6_add_addr(idev, &addr, plen, flag, 20851da177e4SLinus Torvalds IFA_F_PERMANENT); 20861da177e4SLinus Torvalds if (!IS_ERR(ifp)) { 20871da177e4SLinus Torvalds spin_lock_bh(&ifp->lock); 20881da177e4SLinus Torvalds ifp->flags &= ~IFA_F_TENTATIVE; 20891da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 20901da177e4SLinus Torvalds ipv6_ifa_notify(RTM_NEWADDR, ifp); 20911da177e4SLinus Torvalds in6_ifa_put(ifp); 20921da177e4SLinus Torvalds } 20931da177e4SLinus Torvalds } 20941da177e4SLinus Torvalds } 20951da177e4SLinus Torvalds } 20961da177e4SLinus Torvalds } 20970be669bbSJoerg Roedel #endif 20981da177e4SLinus Torvalds 20991da177e4SLinus Torvalds static void init_loopback(struct net_device *dev) 21001da177e4SLinus Torvalds { 21011da177e4SLinus Torvalds struct inet6_dev *idev; 21021da177e4SLinus Torvalds struct inet6_ifaddr * ifp; 21031da177e4SLinus Torvalds 21041da177e4SLinus Torvalds /* ::1 */ 21051da177e4SLinus Torvalds 21061da177e4SLinus Torvalds ASSERT_RTNL(); 21071da177e4SLinus Torvalds 21081da177e4SLinus Torvalds if ((idev = ipv6_find_idev(dev)) == NULL) { 21091da177e4SLinus Torvalds printk(KERN_DEBUG "init loopback: add_dev failed\n"); 21101da177e4SLinus Torvalds return; 21111da177e4SLinus Torvalds } 21121da177e4SLinus Torvalds 21131da177e4SLinus Torvalds ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT); 21141da177e4SLinus Torvalds if (!IS_ERR(ifp)) { 21151da177e4SLinus Torvalds spin_lock_bh(&ifp->lock); 21161da177e4SLinus Torvalds ifp->flags &= ~IFA_F_TENTATIVE; 21171da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 21181da177e4SLinus Torvalds ipv6_ifa_notify(RTM_NEWADDR, ifp); 21191da177e4SLinus Torvalds in6_ifa_put(ifp); 21201da177e4SLinus Torvalds } 21211da177e4SLinus Torvalds } 21221da177e4SLinus Torvalds 21231da177e4SLinus Torvalds static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) 21241da177e4SLinus Torvalds { 21251da177e4SLinus Torvalds struct inet6_ifaddr * ifp; 212695c385b4SNeil Horman u32 addr_flags = IFA_F_PERMANENT; 21271da177e4SLinus Torvalds 212895c385b4SNeil Horman #ifdef CONFIG_IPV6_OPTIMISTIC_DAD 212995c385b4SNeil Horman if (idev->cnf.optimistic_dad && 213095c385b4SNeil Horman !ipv6_devconf.forwarding) 213195c385b4SNeil Horman addr_flags |= IFA_F_OPTIMISTIC; 213295c385b4SNeil Horman #endif 213395c385b4SNeil Horman 213495c385b4SNeil Horman 213595c385b4SNeil Horman ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags); 21361da177e4SLinus Torvalds if (!IS_ERR(ifp)) { 213746d48046SYOSHIFUJI Hideaki addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); 21381da177e4SLinus Torvalds addrconf_dad_start(ifp, 0); 21391da177e4SLinus Torvalds in6_ifa_put(ifp); 21401da177e4SLinus Torvalds } 21411da177e4SLinus Torvalds } 21421da177e4SLinus Torvalds 21431da177e4SLinus Torvalds static void addrconf_dev_config(struct net_device *dev) 21441da177e4SLinus Torvalds { 21451da177e4SLinus Torvalds struct in6_addr addr; 21461da177e4SLinus Torvalds struct inet6_dev * idev; 21471da177e4SLinus Torvalds 21481da177e4SLinus Torvalds ASSERT_RTNL(); 21491da177e4SLinus Torvalds 215074235a25SHerbert Xu if ((dev->type != ARPHRD_ETHER) && 215174235a25SHerbert Xu (dev->type != ARPHRD_FDDI) && 215274235a25SHerbert Xu (dev->type != ARPHRD_IEEE802_TR) && 215374235a25SHerbert Xu (dev->type != ARPHRD_ARCNET) && 215474235a25SHerbert Xu (dev->type != ARPHRD_INFINIBAND)) { 215574235a25SHerbert Xu /* Alas, we support only Ethernet autoconfiguration. */ 215674235a25SHerbert Xu return; 215774235a25SHerbert Xu } 215874235a25SHerbert Xu 21591da177e4SLinus Torvalds idev = addrconf_add_dev(dev); 21601da177e4SLinus Torvalds if (idev == NULL) 21611da177e4SLinus Torvalds return; 21621da177e4SLinus Torvalds 21631da177e4SLinus Torvalds memset(&addr, 0, sizeof(struct in6_addr)); 21641da177e4SLinus Torvalds addr.s6_addr32[0] = htonl(0xFE800000); 21651da177e4SLinus Torvalds 21661da177e4SLinus Torvalds if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) 21671da177e4SLinus Torvalds addrconf_add_linklocal(idev, &addr); 21681da177e4SLinus Torvalds } 21691da177e4SLinus Torvalds 21700be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) 21711da177e4SLinus Torvalds static void addrconf_sit_config(struct net_device *dev) 21721da177e4SLinus Torvalds { 21731da177e4SLinus Torvalds struct inet6_dev *idev; 21741da177e4SLinus Torvalds 21751da177e4SLinus Torvalds ASSERT_RTNL(); 21761da177e4SLinus Torvalds 21771da177e4SLinus Torvalds /* 21781da177e4SLinus Torvalds * Configure the tunnel with one of our IPv4 21791da177e4SLinus Torvalds * addresses... we should configure all of 21801da177e4SLinus Torvalds * our v4 addrs in the tunnel 21811da177e4SLinus Torvalds */ 21821da177e4SLinus Torvalds 21831da177e4SLinus Torvalds if ((idev = ipv6_find_idev(dev)) == NULL) { 21841da177e4SLinus Torvalds printk(KERN_DEBUG "init sit: add_dev failed\n"); 21851da177e4SLinus Torvalds return; 21861da177e4SLinus Torvalds } 21871da177e4SLinus Torvalds 2188c7dc89c0SFred L. Templin if (dev->priv_flags & IFF_ISATAP) { 2189c7dc89c0SFred L. Templin struct in6_addr addr; 2190c7dc89c0SFred L. Templin 2191c7dc89c0SFred L. Templin ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); 2192c7dc89c0SFred L. Templin addrconf_prefix_route(&addr, 64, dev, 0, 0); 2193c7dc89c0SFred L. Templin if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) 2194c7dc89c0SFred L. Templin addrconf_add_linklocal(idev, &addr); 2195c7dc89c0SFred L. Templin return; 2196c7dc89c0SFred L. Templin } 2197c7dc89c0SFred L. Templin 21981da177e4SLinus Torvalds sit_add_v4_addrs(idev); 21991da177e4SLinus Torvalds 22001da177e4SLinus Torvalds if (dev->flags&IFF_POINTOPOINT) { 22011da177e4SLinus Torvalds addrconf_add_mroute(dev); 22021da177e4SLinus Torvalds addrconf_add_lroute(dev); 22031da177e4SLinus Torvalds } else 22041da177e4SLinus Torvalds sit_route_add(dev); 22051da177e4SLinus Torvalds } 22060be669bbSJoerg Roedel #endif 22071da177e4SLinus Torvalds 22081da177e4SLinus Torvalds static inline int 22091da177e4SLinus Torvalds ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) 22101da177e4SLinus Torvalds { 22111da177e4SLinus Torvalds struct in6_addr lladdr; 22121da177e4SLinus Torvalds 221395c385b4SNeil Horman if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { 22141da177e4SLinus Torvalds addrconf_add_linklocal(idev, &lladdr); 22151da177e4SLinus Torvalds return 0; 22161da177e4SLinus Torvalds } 22171da177e4SLinus Torvalds return -1; 22181da177e4SLinus Torvalds } 22191da177e4SLinus Torvalds 22201da177e4SLinus Torvalds static void ip6_tnl_add_linklocal(struct inet6_dev *idev) 22211da177e4SLinus Torvalds { 22221da177e4SLinus Torvalds struct net_device *link_dev; 22231da177e4SLinus Torvalds 22241da177e4SLinus Torvalds /* first try to inherit the link-local address from the link device */ 22251da177e4SLinus Torvalds if (idev->dev->iflink && 2226881d966bSEric W. Biederman (link_dev = __dev_get_by_index(&init_net, idev->dev->iflink))) { 22271da177e4SLinus Torvalds if (!ipv6_inherit_linklocal(idev, link_dev)) 22281da177e4SLinus Torvalds return; 22291da177e4SLinus Torvalds } 22301da177e4SLinus Torvalds /* then try to inherit it from any device */ 2231881d966bSEric W. Biederman for_each_netdev(&init_net, link_dev) { 22321da177e4SLinus Torvalds if (!ipv6_inherit_linklocal(idev, link_dev)) 22331da177e4SLinus Torvalds return; 22341da177e4SLinus Torvalds } 22351da177e4SLinus Torvalds printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); 22361da177e4SLinus Torvalds } 22371da177e4SLinus Torvalds 22381da177e4SLinus Torvalds /* 22391da177e4SLinus Torvalds * Autoconfigure tunnel with a link-local address so routing protocols, 22401da177e4SLinus Torvalds * DHCPv6, MLD etc. can be run over the virtual link 22411da177e4SLinus Torvalds */ 22421da177e4SLinus Torvalds 22431da177e4SLinus Torvalds static void addrconf_ip6_tnl_config(struct net_device *dev) 22441da177e4SLinus Torvalds { 22451da177e4SLinus Torvalds struct inet6_dev *idev; 22461da177e4SLinus Torvalds 22471da177e4SLinus Torvalds ASSERT_RTNL(); 22481da177e4SLinus Torvalds 22491da177e4SLinus Torvalds if ((idev = addrconf_add_dev(dev)) == NULL) { 22501da177e4SLinus Torvalds printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); 22511da177e4SLinus Torvalds return; 22521da177e4SLinus Torvalds } 22531da177e4SLinus Torvalds ip6_tnl_add_linklocal(idev); 22541da177e4SLinus Torvalds } 22551da177e4SLinus Torvalds 22561da177e4SLinus Torvalds static int addrconf_notify(struct notifier_block *this, unsigned long event, 22571da177e4SLinus Torvalds void * data) 22581da177e4SLinus Torvalds { 22591da177e4SLinus Torvalds struct net_device *dev = (struct net_device *) data; 226074235a25SHerbert Xu struct inet6_dev *idev = __in6_dev_get(dev); 2261c5e33bddSYOSHIFUJI Hideaki int run_pending = 0; 2262b217d616SHerbert Xu int err; 22631da177e4SLinus Torvalds 2264e9dc8653SEric W. Biederman if (dev->nd_net != &init_net) 2265e9dc8653SEric W. Biederman return NOTIFY_DONE; 2266e9dc8653SEric W. Biederman 22671da177e4SLinus Torvalds switch(event) { 226845ba9dd2SYOSHIFUJI Hideaki case NETDEV_REGISTER: 226974235a25SHerbert Xu if (!idev && dev->mtu >= IPV6_MIN_MTU) { 227045ba9dd2SYOSHIFUJI Hideaki idev = ipv6_add_dev(dev); 227145ba9dd2SYOSHIFUJI Hideaki if (!idev) 2272b217d616SHerbert Xu return notifier_from_errno(-ENOMEM); 227345ba9dd2SYOSHIFUJI Hideaki } 227445ba9dd2SYOSHIFUJI Hideaki break; 22751da177e4SLinus Torvalds case NETDEV_UP: 22763c21edbdSYOSHIFUJI Hideaki case NETDEV_CHANGE: 2277c2edacf8SJay Vosburgh if (dev->flags & IFF_SLAVE) 2278c2edacf8SJay Vosburgh break; 2279c2edacf8SJay Vosburgh 22803c21edbdSYOSHIFUJI Hideaki if (event == NETDEV_UP) { 2281f24e3d65SMitsuru Chinen if (!addrconf_qdisc_ok(dev)) { 22823c21edbdSYOSHIFUJI Hideaki /* device is not ready yet. */ 22833c21edbdSYOSHIFUJI Hideaki printk(KERN_INFO 22843c21edbdSYOSHIFUJI Hideaki "ADDRCONF(NETDEV_UP): %s: " 22853c21edbdSYOSHIFUJI Hideaki "link is not ready\n", 22863c21edbdSYOSHIFUJI Hideaki dev->name); 22873c21edbdSYOSHIFUJI Hideaki break; 22883c21edbdSYOSHIFUJI Hideaki } 228999081049SKristian Slavov 2290d31c7b8fSEvgeniy Polyakov if (!idev && dev->mtu >= IPV6_MIN_MTU) 2291d31c7b8fSEvgeniy Polyakov idev = ipv6_add_dev(dev); 2292d31c7b8fSEvgeniy Polyakov 229399081049SKristian Slavov if (idev) 229499081049SKristian Slavov idev->if_flags |= IF_READY; 22953c21edbdSYOSHIFUJI Hideaki } else { 2296f24e3d65SMitsuru Chinen if (!addrconf_qdisc_ok(dev)) { 22973c21edbdSYOSHIFUJI Hideaki /* device is still not ready. */ 22983c21edbdSYOSHIFUJI Hideaki break; 22993c21edbdSYOSHIFUJI Hideaki } 23003c21edbdSYOSHIFUJI Hideaki 23013c21edbdSYOSHIFUJI Hideaki if (idev) { 23023c21edbdSYOSHIFUJI Hideaki if (idev->if_flags & IF_READY) { 23033c21edbdSYOSHIFUJI Hideaki /* device is already configured. */ 23043c21edbdSYOSHIFUJI Hideaki break; 23053c21edbdSYOSHIFUJI Hideaki } 23063c21edbdSYOSHIFUJI Hideaki idev->if_flags |= IF_READY; 23073c21edbdSYOSHIFUJI Hideaki } 23083c21edbdSYOSHIFUJI Hideaki 23093c21edbdSYOSHIFUJI Hideaki printk(KERN_INFO 23103c21edbdSYOSHIFUJI Hideaki "ADDRCONF(NETDEV_CHANGE): %s: " 23113c21edbdSYOSHIFUJI Hideaki "link becomes ready\n", 23123c21edbdSYOSHIFUJI Hideaki dev->name); 23133c21edbdSYOSHIFUJI Hideaki 2314c5e33bddSYOSHIFUJI Hideaki run_pending = 1; 23153c21edbdSYOSHIFUJI Hideaki } 23163c21edbdSYOSHIFUJI Hideaki 23171da177e4SLinus Torvalds switch(dev->type) { 23180be669bbSJoerg Roedel #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) 23191da177e4SLinus Torvalds case ARPHRD_SIT: 23201da177e4SLinus Torvalds addrconf_sit_config(dev); 23211da177e4SLinus Torvalds break; 23220be669bbSJoerg Roedel #endif 23231da177e4SLinus Torvalds case ARPHRD_TUNNEL6: 23241da177e4SLinus Torvalds addrconf_ip6_tnl_config(dev); 23251da177e4SLinus Torvalds break; 23261da177e4SLinus Torvalds case ARPHRD_LOOPBACK: 23271da177e4SLinus Torvalds init_loopback(dev); 23281da177e4SLinus Torvalds break; 23291da177e4SLinus Torvalds 23301da177e4SLinus Torvalds default: 23311da177e4SLinus Torvalds addrconf_dev_config(dev); 23321da177e4SLinus Torvalds break; 23333ff50b79SStephen Hemminger } 23341da177e4SLinus Torvalds if (idev) { 2335c5e33bddSYOSHIFUJI Hideaki if (run_pending) 2336c5e33bddSYOSHIFUJI Hideaki addrconf_dad_run(idev); 2337c5e33bddSYOSHIFUJI Hideaki 23381da177e4SLinus Torvalds /* If the MTU changed during the interface down, when the 23391da177e4SLinus Torvalds interface up, the changed MTU must be reflected in the 23401da177e4SLinus Torvalds idev as well as routers. 23411da177e4SLinus Torvalds */ 23421da177e4SLinus Torvalds if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) { 23431da177e4SLinus Torvalds rt6_mtu_change(dev, dev->mtu); 23441da177e4SLinus Torvalds idev->cnf.mtu6 = dev->mtu; 23451da177e4SLinus Torvalds } 23461da177e4SLinus Torvalds idev->tstamp = jiffies; 23471da177e4SLinus Torvalds inet6_ifinfo_notify(RTM_NEWLINK, idev); 23481da177e4SLinus Torvalds /* If the changed mtu during down is lower than IPV6_MIN_MTU 23491da177e4SLinus Torvalds stop IPv6 on this interface. 23501da177e4SLinus Torvalds */ 23511da177e4SLinus Torvalds if (dev->mtu < IPV6_MIN_MTU) 23521da177e4SLinus Torvalds addrconf_ifdown(dev, event != NETDEV_DOWN); 23531da177e4SLinus Torvalds } 23541da177e4SLinus Torvalds break; 23551da177e4SLinus Torvalds 23561da177e4SLinus Torvalds case NETDEV_CHANGEMTU: 23571da177e4SLinus Torvalds if (idev && dev->mtu >= IPV6_MIN_MTU) { 23581da177e4SLinus Torvalds rt6_mtu_change(dev, dev->mtu); 23591da177e4SLinus Torvalds idev->cnf.mtu6 = dev->mtu; 23601da177e4SLinus Torvalds break; 23611da177e4SLinus Torvalds } 23621da177e4SLinus Torvalds 2363d31c7b8fSEvgeniy Polyakov if (!idev && dev->mtu >= IPV6_MIN_MTU) { 2364d31c7b8fSEvgeniy Polyakov idev = ipv6_add_dev(dev); 2365d31c7b8fSEvgeniy Polyakov if (idev) 2366d31c7b8fSEvgeniy Polyakov break; 2367d31c7b8fSEvgeniy Polyakov } 2368d31c7b8fSEvgeniy Polyakov 23691da177e4SLinus Torvalds /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */ 23701da177e4SLinus Torvalds 23711da177e4SLinus Torvalds case NETDEV_DOWN: 23721da177e4SLinus Torvalds case NETDEV_UNREGISTER: 23731da177e4SLinus Torvalds /* 23741da177e4SLinus Torvalds * Remove all addresses from this interface. 23751da177e4SLinus Torvalds */ 23761da177e4SLinus Torvalds addrconf_ifdown(dev, event != NETDEV_DOWN); 23771da177e4SLinus Torvalds break; 23783c21edbdSYOSHIFUJI Hideaki 23791da177e4SLinus Torvalds case NETDEV_CHANGENAME: 23801da177e4SLinus Torvalds if (idev) { 23815632c515SStephen Hemminger snmp6_unregister_dev(idev); 23825632c515SStephen Hemminger #ifdef CONFIG_SYSCTL 23831da177e4SLinus Torvalds addrconf_sysctl_unregister(&idev->cnf); 23841da177e4SLinus Torvalds neigh_sysctl_unregister(idev->nd_parms); 23851da177e4SLinus Torvalds neigh_sysctl_register(dev, idev->nd_parms, 23861da177e4SLinus Torvalds NET_IPV6, NET_IPV6_NEIGH, "ipv6", 23871da177e4SLinus Torvalds &ndisc_ifinfo_sysctl_change, 23881da177e4SLinus Torvalds NULL); 23891da177e4SLinus Torvalds addrconf_sysctl_register(idev, &idev->cnf); 23901da177e4SLinus Torvalds #endif 2391b217d616SHerbert Xu err = snmp6_register_dev(idev); 2392b217d616SHerbert Xu if (err) 2393b217d616SHerbert Xu return notifier_from_errno(err); 23945632c515SStephen Hemminger } 23951da177e4SLinus Torvalds break; 23963ff50b79SStephen Hemminger } 23971da177e4SLinus Torvalds 23981da177e4SLinus Torvalds return NOTIFY_OK; 23991da177e4SLinus Torvalds } 24001da177e4SLinus Torvalds 24011da177e4SLinus Torvalds /* 24021da177e4SLinus Torvalds * addrconf module should be notified of a device going up 24031da177e4SLinus Torvalds */ 24041da177e4SLinus Torvalds static struct notifier_block ipv6_dev_notf = { 24051da177e4SLinus Torvalds .notifier_call = addrconf_notify, 24061da177e4SLinus Torvalds .priority = 0 24071da177e4SLinus Torvalds }; 24081da177e4SLinus Torvalds 24091da177e4SLinus Torvalds static int addrconf_ifdown(struct net_device *dev, int how) 24101da177e4SLinus Torvalds { 24111da177e4SLinus Torvalds struct inet6_dev *idev; 24121da177e4SLinus Torvalds struct inet6_ifaddr *ifa, **bifa; 24131da177e4SLinus Torvalds int i; 24141da177e4SLinus Torvalds 24151da177e4SLinus Torvalds ASSERT_RTNL(); 24161da177e4SLinus Torvalds 24172774c7abSEric W. Biederman if (dev == init_net.loopback_dev && how == 1) 24181da177e4SLinus Torvalds how = 0; 24191da177e4SLinus Torvalds 24201da177e4SLinus Torvalds rt6_ifdown(dev); 24211da177e4SLinus Torvalds neigh_ifdown(&nd_tbl, dev); 24221da177e4SLinus Torvalds 24231da177e4SLinus Torvalds idev = __in6_dev_get(dev); 24241da177e4SLinus Torvalds if (idev == NULL) 24251da177e4SLinus Torvalds return -ENODEV; 24261da177e4SLinus Torvalds 24271da177e4SLinus Torvalds /* Step 1: remove reference to ipv6 device from parent device. 24281da177e4SLinus Torvalds Do not dev_put! 24291da177e4SLinus Torvalds */ 24301da177e4SLinus Torvalds if (how == 1) { 24311da177e4SLinus Torvalds idev->dead = 1; 24328814c4b5SYOSHIFUJI Hideaki 24338814c4b5SYOSHIFUJI Hideaki /* protected by rtnl_lock */ 24348814c4b5SYOSHIFUJI Hideaki rcu_assign_pointer(dev->ip6_ptr, NULL); 24351da177e4SLinus Torvalds 24361da177e4SLinus Torvalds /* Step 1.5: remove snmp6 entry */ 24371da177e4SLinus Torvalds snmp6_unregister_dev(idev); 24381da177e4SLinus Torvalds 24391da177e4SLinus Torvalds } 24401da177e4SLinus Torvalds 24411da177e4SLinus Torvalds /* Step 2: clear hash table */ 24421da177e4SLinus Torvalds for (i=0; i<IN6_ADDR_HSIZE; i++) { 24431da177e4SLinus Torvalds bifa = &inet6_addr_lst[i]; 24441da177e4SLinus Torvalds 24451da177e4SLinus Torvalds write_lock_bh(&addrconf_hash_lock); 24461da177e4SLinus Torvalds while ((ifa = *bifa) != NULL) { 24471da177e4SLinus Torvalds if (ifa->idev == idev) { 24481da177e4SLinus Torvalds *bifa = ifa->lst_next; 24491da177e4SLinus Torvalds ifa->lst_next = NULL; 24501da177e4SLinus Torvalds addrconf_del_timer(ifa); 24511da177e4SLinus Torvalds in6_ifa_put(ifa); 24521da177e4SLinus Torvalds continue; 24531da177e4SLinus Torvalds } 24541da177e4SLinus Torvalds bifa = &ifa->lst_next; 24551da177e4SLinus Torvalds } 24561da177e4SLinus Torvalds write_unlock_bh(&addrconf_hash_lock); 24571da177e4SLinus Torvalds } 24581da177e4SLinus Torvalds 24591da177e4SLinus Torvalds write_lock_bh(&idev->lock); 24601da177e4SLinus Torvalds 24611da177e4SLinus Torvalds /* Step 3: clear flags for stateless addrconf */ 24621da177e4SLinus Torvalds if (how != 1) 24633c21edbdSYOSHIFUJI Hideaki idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); 24641da177e4SLinus Torvalds 24651da177e4SLinus Torvalds /* Step 4: clear address list */ 24661da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 24671da177e4SLinus Torvalds if (how == 1 && del_timer(&idev->regen_timer)) 24681da177e4SLinus Torvalds in6_dev_put(idev); 24691da177e4SLinus Torvalds 24701da177e4SLinus Torvalds /* clear tempaddr list */ 24711da177e4SLinus Torvalds while ((ifa = idev->tempaddr_list) != NULL) { 24721da177e4SLinus Torvalds idev->tempaddr_list = ifa->tmp_next; 24731da177e4SLinus Torvalds ifa->tmp_next = NULL; 24741da177e4SLinus Torvalds ifa->dead = 1; 24751da177e4SLinus Torvalds write_unlock_bh(&idev->lock); 24761da177e4SLinus Torvalds spin_lock_bh(&ifa->lock); 24771da177e4SLinus Torvalds 24781da177e4SLinus Torvalds if (ifa->ifpub) { 24791da177e4SLinus Torvalds in6_ifa_put(ifa->ifpub); 24801da177e4SLinus Torvalds ifa->ifpub = NULL; 24811da177e4SLinus Torvalds } 24821da177e4SLinus Torvalds spin_unlock_bh(&ifa->lock); 24831da177e4SLinus Torvalds in6_ifa_put(ifa); 24841da177e4SLinus Torvalds write_lock_bh(&idev->lock); 24851da177e4SLinus Torvalds } 24861da177e4SLinus Torvalds #endif 24871da177e4SLinus Torvalds while ((ifa = idev->addr_list) != NULL) { 24881da177e4SLinus Torvalds idev->addr_list = ifa->if_next; 24891da177e4SLinus Torvalds ifa->if_next = NULL; 24901da177e4SLinus Torvalds ifa->dead = 1; 24911da177e4SLinus Torvalds addrconf_del_timer(ifa); 24921da177e4SLinus Torvalds write_unlock_bh(&idev->lock); 24931da177e4SLinus Torvalds 24941da177e4SLinus Torvalds __ipv6_ifa_notify(RTM_DELADDR, ifa); 2495063ed369SVlad Yasevich atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa); 24961da177e4SLinus Torvalds in6_ifa_put(ifa); 24971da177e4SLinus Torvalds 24981da177e4SLinus Torvalds write_lock_bh(&idev->lock); 24991da177e4SLinus Torvalds } 25001da177e4SLinus Torvalds write_unlock_bh(&idev->lock); 25011da177e4SLinus Torvalds 25021da177e4SLinus Torvalds /* Step 5: Discard multicast list */ 25031da177e4SLinus Torvalds 25041da177e4SLinus Torvalds if (how == 1) 25051da177e4SLinus Torvalds ipv6_mc_destroy_dev(idev); 25061da177e4SLinus Torvalds else 25071da177e4SLinus Torvalds ipv6_mc_down(idev); 25081da177e4SLinus Torvalds 25091da177e4SLinus Torvalds idev->tstamp = jiffies; 25101da177e4SLinus Torvalds 25111da177e4SLinus Torvalds /* Shot the device (if unregistered) */ 25121da177e4SLinus Torvalds 25131da177e4SLinus Torvalds if (how == 1) { 25141da177e4SLinus Torvalds #ifdef CONFIG_SYSCTL 25151da177e4SLinus Torvalds addrconf_sysctl_unregister(&idev->cnf); 25161da177e4SLinus Torvalds neigh_sysctl_unregister(idev->nd_parms); 25171da177e4SLinus Torvalds #endif 25181da177e4SLinus Torvalds neigh_parms_release(&nd_tbl, idev->nd_parms); 25191da177e4SLinus Torvalds neigh_ifdown(&nd_tbl, dev); 25201da177e4SLinus Torvalds in6_dev_put(idev); 25211da177e4SLinus Torvalds } 25221da177e4SLinus Torvalds return 0; 25231da177e4SLinus Torvalds } 25241da177e4SLinus Torvalds 25251da177e4SLinus Torvalds static void addrconf_rs_timer(unsigned long data) 25261da177e4SLinus Torvalds { 25271da177e4SLinus Torvalds struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; 25281da177e4SLinus Torvalds 25291da177e4SLinus Torvalds if (ifp->idev->cnf.forwarding) 25301da177e4SLinus Torvalds goto out; 25311da177e4SLinus Torvalds 25321da177e4SLinus Torvalds if (ifp->idev->if_flags & IF_RA_RCVD) { 25331da177e4SLinus Torvalds /* 25341da177e4SLinus Torvalds * Announcement received after solicitation 25351da177e4SLinus Torvalds * was sent 25361da177e4SLinus Torvalds */ 25371da177e4SLinus Torvalds goto out; 25381da177e4SLinus Torvalds } 25391da177e4SLinus Torvalds 25401da177e4SLinus Torvalds spin_lock(&ifp->lock); 25411da177e4SLinus Torvalds if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) { 25421da177e4SLinus Torvalds struct in6_addr all_routers; 25431da177e4SLinus Torvalds 25441da177e4SLinus Torvalds /* The wait after the last probe can be shorter */ 25451da177e4SLinus Torvalds addrconf_mod_timer(ifp, AC_RS, 25461da177e4SLinus Torvalds (ifp->probes == ifp->idev->cnf.rtr_solicits) ? 25471da177e4SLinus Torvalds ifp->idev->cnf.rtr_solicit_delay : 25481da177e4SLinus Torvalds ifp->idev->cnf.rtr_solicit_interval); 25491da177e4SLinus Torvalds spin_unlock(&ifp->lock); 25501da177e4SLinus Torvalds 25511da177e4SLinus Torvalds ipv6_addr_all_routers(&all_routers); 25521da177e4SLinus Torvalds 25531da177e4SLinus Torvalds ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); 25541da177e4SLinus Torvalds } else { 25551da177e4SLinus Torvalds spin_unlock(&ifp->lock); 25561da177e4SLinus Torvalds /* 25571da177e4SLinus Torvalds * Note: we do not support deprecated "all on-link" 25581da177e4SLinus Torvalds * assumption any longer. 25591da177e4SLinus Torvalds */ 25601da177e4SLinus Torvalds printk(KERN_DEBUG "%s: no IPv6 routers present\n", 25611da177e4SLinus Torvalds ifp->idev->dev->name); 25621da177e4SLinus Torvalds } 25631da177e4SLinus Torvalds 25641da177e4SLinus Torvalds out: 25651da177e4SLinus Torvalds in6_ifa_put(ifp); 25661da177e4SLinus Torvalds } 25671da177e4SLinus Torvalds 25681da177e4SLinus Torvalds /* 25691da177e4SLinus Torvalds * Duplicate Address Detection 25701da177e4SLinus Torvalds */ 25713c21edbdSYOSHIFUJI Hideaki static void addrconf_dad_kick(struct inet6_ifaddr *ifp) 25723c21edbdSYOSHIFUJI Hideaki { 25733c21edbdSYOSHIFUJI Hideaki unsigned long rand_num; 25743c21edbdSYOSHIFUJI Hideaki struct inet6_dev *idev = ifp->idev; 25753c21edbdSYOSHIFUJI Hideaki 257695c385b4SNeil Horman if (ifp->flags & IFA_F_OPTIMISTIC) 257795c385b4SNeil Horman rand_num = 0; 257895c385b4SNeil Horman else 25793c21edbdSYOSHIFUJI Hideaki rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); 258095c385b4SNeil Horman 25813c21edbdSYOSHIFUJI Hideaki ifp->probes = idev->cnf.dad_transmits; 25823c21edbdSYOSHIFUJI Hideaki addrconf_mod_timer(ifp, AC_DAD, rand_num); 25833c21edbdSYOSHIFUJI Hideaki } 25843c21edbdSYOSHIFUJI Hideaki 2585e431b8c0SJamal Hadi Salim static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) 25861da177e4SLinus Torvalds { 25871da177e4SLinus Torvalds struct inet6_dev *idev = ifp->idev; 25881da177e4SLinus Torvalds struct net_device *dev = idev->dev; 25891da177e4SLinus Torvalds 25901da177e4SLinus Torvalds addrconf_join_solict(dev, &ifp->addr); 25911da177e4SLinus Torvalds 25921da177e4SLinus Torvalds net_srandom(ifp->addr.s6_addr32[3]); 25931da177e4SLinus Torvalds 25941da177e4SLinus Torvalds read_lock_bh(&idev->lock); 25951da177e4SLinus Torvalds if (ifp->dead) 25961da177e4SLinus Torvalds goto out; 25971da177e4SLinus Torvalds spin_lock_bh(&ifp->lock); 25981da177e4SLinus Torvalds 25991da177e4SLinus Torvalds if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || 260055ebaef1SNoriaki TAKAMIYA !(ifp->flags&IFA_F_TENTATIVE) || 260155ebaef1SNoriaki TAKAMIYA ifp->flags & IFA_F_NODAD) { 260295c385b4SNeil Horman ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC); 26031da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 26041da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 26051da177e4SLinus Torvalds 26061da177e4SLinus Torvalds addrconf_dad_completed(ifp); 26071da177e4SLinus Torvalds return; 26081da177e4SLinus Torvalds } 26091da177e4SLinus Torvalds 26106732badeSYOSHIFUJI Hideaki if (!(idev->if_flags & IF_READY)) { 26113dd3bf83SYOSHIFUJI Hideaki spin_unlock_bh(&ifp->lock); 26126732badeSYOSHIFUJI Hideaki read_unlock_bh(&idev->lock); 26133c21edbdSYOSHIFUJI Hideaki /* 26143c21edbdSYOSHIFUJI Hideaki * If the defice is not ready: 26153c21edbdSYOSHIFUJI Hideaki * - keep it tentative if it is a permanent address. 26163c21edbdSYOSHIFUJI Hideaki * - otherwise, kill it. 26173c21edbdSYOSHIFUJI Hideaki */ 26183c21edbdSYOSHIFUJI Hideaki in6_ifa_hold(ifp); 26193c21edbdSYOSHIFUJI Hideaki addrconf_dad_stop(ifp); 26206732badeSYOSHIFUJI Hideaki return; 26213c21edbdSYOSHIFUJI Hideaki } 262295c385b4SNeil Horman 262395c385b4SNeil Horman /* 262495c385b4SNeil Horman * Optimistic nodes can start receiving 262595c385b4SNeil Horman * Frames right away 262695c385b4SNeil Horman */ 262795c385b4SNeil Horman if(ifp->flags & IFA_F_OPTIMISTIC) 262895c385b4SNeil Horman ip6_ins_rt(ifp->rt); 262995c385b4SNeil Horman 26306732badeSYOSHIFUJI Hideaki addrconf_dad_kick(ifp); 26316732badeSYOSHIFUJI Hideaki spin_unlock_bh(&ifp->lock); 26321da177e4SLinus Torvalds out: 26331da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 26341da177e4SLinus Torvalds } 26351da177e4SLinus Torvalds 26361da177e4SLinus Torvalds static void addrconf_dad_timer(unsigned long data) 26371da177e4SLinus Torvalds { 26381da177e4SLinus Torvalds struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; 26391da177e4SLinus Torvalds struct inet6_dev *idev = ifp->idev; 26401da177e4SLinus Torvalds struct in6_addr unspec; 26411da177e4SLinus Torvalds struct in6_addr mcaddr; 26421da177e4SLinus Torvalds 26431da177e4SLinus Torvalds read_lock_bh(&idev->lock); 26441da177e4SLinus Torvalds if (idev->dead) { 26451da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 26461da177e4SLinus Torvalds goto out; 26471da177e4SLinus Torvalds } 26481da177e4SLinus Torvalds spin_lock_bh(&ifp->lock); 26491da177e4SLinus Torvalds if (ifp->probes == 0) { 26501da177e4SLinus Torvalds /* 26511da177e4SLinus Torvalds * DAD was successful 26521da177e4SLinus Torvalds */ 26531da177e4SLinus Torvalds 265495c385b4SNeil Horman ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC); 26551da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 26561da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 26571da177e4SLinus Torvalds 26581da177e4SLinus Torvalds addrconf_dad_completed(ifp); 26591da177e4SLinus Torvalds 26601da177e4SLinus Torvalds goto out; 26611da177e4SLinus Torvalds } 26621da177e4SLinus Torvalds 26631da177e4SLinus Torvalds ifp->probes--; 26641da177e4SLinus Torvalds addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); 26651da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 26661da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 26671da177e4SLinus Torvalds 26681da177e4SLinus Torvalds /* send a neighbour solicitation for our addr */ 26691da177e4SLinus Torvalds memset(&unspec, 0, sizeof(unspec)); 26701da177e4SLinus Torvalds addrconf_addr_solict_mult(&ifp->addr, &mcaddr); 26711da177e4SLinus Torvalds ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec); 26721da177e4SLinus Torvalds out: 26731da177e4SLinus Torvalds in6_ifa_put(ifp); 26741da177e4SLinus Torvalds } 26751da177e4SLinus Torvalds 26761da177e4SLinus Torvalds static void addrconf_dad_completed(struct inet6_ifaddr *ifp) 26771da177e4SLinus Torvalds { 26781da177e4SLinus Torvalds struct net_device * dev = ifp->idev->dev; 26791da177e4SLinus Torvalds 26801da177e4SLinus Torvalds /* 26811da177e4SLinus Torvalds * Configure the address for reception. Now it is valid. 26821da177e4SLinus Torvalds */ 26831da177e4SLinus Torvalds 26841da177e4SLinus Torvalds ipv6_ifa_notify(RTM_NEWADDR, ifp); 26851da177e4SLinus Torvalds 26861da177e4SLinus Torvalds /* If added prefix is link local and forwarding is off, 26871da177e4SLinus Torvalds start sending router solicitations. 26881da177e4SLinus Torvalds */ 26891da177e4SLinus Torvalds 26901da177e4SLinus Torvalds if (ifp->idev->cnf.forwarding == 0 && 26911da177e4SLinus Torvalds ifp->idev->cnf.rtr_solicits > 0 && 26921da177e4SLinus Torvalds (dev->flags&IFF_LOOPBACK) == 0 && 26931da177e4SLinus Torvalds (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { 26941da177e4SLinus Torvalds struct in6_addr all_routers; 26951da177e4SLinus Torvalds 26961da177e4SLinus Torvalds ipv6_addr_all_routers(&all_routers); 26971da177e4SLinus Torvalds 26981da177e4SLinus Torvalds /* 26991da177e4SLinus Torvalds * If a host as already performed a random delay 27001da177e4SLinus Torvalds * [...] as part of DAD [...] there is no need 27011da177e4SLinus Torvalds * to delay again before sending the first RS 27021da177e4SLinus Torvalds */ 27031da177e4SLinus Torvalds ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); 27041da177e4SLinus Torvalds 27051da177e4SLinus Torvalds spin_lock_bh(&ifp->lock); 27061da177e4SLinus Torvalds ifp->probes = 1; 27071da177e4SLinus Torvalds ifp->idev->if_flags |= IF_RS_SENT; 27081da177e4SLinus Torvalds addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); 27091da177e4SLinus Torvalds spin_unlock_bh(&ifp->lock); 27101da177e4SLinus Torvalds } 27111da177e4SLinus Torvalds } 27121da177e4SLinus Torvalds 2713c5e33bddSYOSHIFUJI Hideaki static void addrconf_dad_run(struct inet6_dev *idev) { 2714c5e33bddSYOSHIFUJI Hideaki struct inet6_ifaddr *ifp; 2715c5e33bddSYOSHIFUJI Hideaki 2716c5e33bddSYOSHIFUJI Hideaki read_lock_bh(&idev->lock); 2717c5e33bddSYOSHIFUJI Hideaki for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) { 2718c5e33bddSYOSHIFUJI Hideaki spin_lock_bh(&ifp->lock); 2719c5e33bddSYOSHIFUJI Hideaki if (!(ifp->flags & IFA_F_TENTATIVE)) { 2720c5e33bddSYOSHIFUJI Hideaki spin_unlock_bh(&ifp->lock); 2721c5e33bddSYOSHIFUJI Hideaki continue; 2722c5e33bddSYOSHIFUJI Hideaki } 2723c5e33bddSYOSHIFUJI Hideaki spin_unlock_bh(&ifp->lock); 2724c5e33bddSYOSHIFUJI Hideaki addrconf_dad_kick(ifp); 2725c5e33bddSYOSHIFUJI Hideaki } 2726c5e33bddSYOSHIFUJI Hideaki read_unlock_bh(&idev->lock); 2727c5e33bddSYOSHIFUJI Hideaki } 2728c5e33bddSYOSHIFUJI Hideaki 27291da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 27301da177e4SLinus Torvalds struct if6_iter_state { 27311da177e4SLinus Torvalds int bucket; 27321da177e4SLinus Torvalds }; 27331da177e4SLinus Torvalds 27341da177e4SLinus Torvalds static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) 27351da177e4SLinus Torvalds { 27361da177e4SLinus Torvalds struct inet6_ifaddr *ifa = NULL; 27371da177e4SLinus Torvalds struct if6_iter_state *state = seq->private; 27381da177e4SLinus Torvalds 27391da177e4SLinus Torvalds for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { 27401da177e4SLinus Torvalds ifa = inet6_addr_lst[state->bucket]; 27411da177e4SLinus Torvalds if (ifa) 27421da177e4SLinus Torvalds break; 27431da177e4SLinus Torvalds } 27441da177e4SLinus Torvalds return ifa; 27451da177e4SLinus Torvalds } 27461da177e4SLinus Torvalds 27471da177e4SLinus Torvalds static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa) 27481da177e4SLinus Torvalds { 27491da177e4SLinus Torvalds struct if6_iter_state *state = seq->private; 27501da177e4SLinus Torvalds 27511da177e4SLinus Torvalds ifa = ifa->lst_next; 27521da177e4SLinus Torvalds try_again: 27531da177e4SLinus Torvalds if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) { 27541da177e4SLinus Torvalds ifa = inet6_addr_lst[state->bucket]; 27551da177e4SLinus Torvalds goto try_again; 27561da177e4SLinus Torvalds } 27571da177e4SLinus Torvalds return ifa; 27581da177e4SLinus Torvalds } 27591da177e4SLinus Torvalds 27601da177e4SLinus Torvalds static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) 27611da177e4SLinus Torvalds { 27621da177e4SLinus Torvalds struct inet6_ifaddr *ifa = if6_get_first(seq); 27631da177e4SLinus Torvalds 27641da177e4SLinus Torvalds if (ifa) 27651da177e4SLinus Torvalds while(pos && (ifa = if6_get_next(seq, ifa)) != NULL) 27661da177e4SLinus Torvalds --pos; 27671da177e4SLinus Torvalds return pos ? NULL : ifa; 27681da177e4SLinus Torvalds } 27691da177e4SLinus Torvalds 27701da177e4SLinus Torvalds static void *if6_seq_start(struct seq_file *seq, loff_t *pos) 27711da177e4SLinus Torvalds { 27721da177e4SLinus Torvalds read_lock_bh(&addrconf_hash_lock); 27731da177e4SLinus Torvalds return if6_get_idx(seq, *pos); 27741da177e4SLinus Torvalds } 27751da177e4SLinus Torvalds 27761da177e4SLinus Torvalds static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) 27771da177e4SLinus Torvalds { 27781da177e4SLinus Torvalds struct inet6_ifaddr *ifa; 27791da177e4SLinus Torvalds 27801da177e4SLinus Torvalds ifa = if6_get_next(seq, v); 27811da177e4SLinus Torvalds ++*pos; 27821da177e4SLinus Torvalds return ifa; 27831da177e4SLinus Torvalds } 27841da177e4SLinus Torvalds 27851da177e4SLinus Torvalds static void if6_seq_stop(struct seq_file *seq, void *v) 27861da177e4SLinus Torvalds { 27871da177e4SLinus Torvalds read_unlock_bh(&addrconf_hash_lock); 27881da177e4SLinus Torvalds } 27891da177e4SLinus Torvalds 27901da177e4SLinus Torvalds static int if6_seq_show(struct seq_file *seq, void *v) 27911da177e4SLinus Torvalds { 27921da177e4SLinus Torvalds struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; 27931da177e4SLinus Torvalds seq_printf(seq, 27949343e79aSYOSHIFUJI Hideaki NIP6_SEQFMT " %02x %02x %02x %02x %8s\n", 27951da177e4SLinus Torvalds NIP6(ifp->addr), 27961da177e4SLinus Torvalds ifp->idev->dev->ifindex, 27971da177e4SLinus Torvalds ifp->prefix_len, 27981da177e4SLinus Torvalds ifp->scope, 27991da177e4SLinus Torvalds ifp->flags, 28001da177e4SLinus Torvalds ifp->idev->dev->name); 28011da177e4SLinus Torvalds return 0; 28021da177e4SLinus Torvalds } 28031da177e4SLinus Torvalds 280456b3d975SPhilippe De Muyter static const struct seq_operations if6_seq_ops = { 28051da177e4SLinus Torvalds .start = if6_seq_start, 28061da177e4SLinus Torvalds .next = if6_seq_next, 28071da177e4SLinus Torvalds .show = if6_seq_show, 28081da177e4SLinus Torvalds .stop = if6_seq_stop, 28091da177e4SLinus Torvalds }; 28101da177e4SLinus Torvalds 28111da177e4SLinus Torvalds static int if6_seq_open(struct inode *inode, struct file *file) 28121da177e4SLinus Torvalds { 2813cf7732e4SPavel Emelyanov return seq_open_private(file, &if6_seq_ops, 2814cf7732e4SPavel Emelyanov sizeof(struct if6_iter_state)); 28151da177e4SLinus Torvalds } 28161da177e4SLinus Torvalds 28179a32144eSArjan van de Ven static const struct file_operations if6_fops = { 28181da177e4SLinus Torvalds .owner = THIS_MODULE, 28191da177e4SLinus Torvalds .open = if6_seq_open, 28201da177e4SLinus Torvalds .read = seq_read, 28211da177e4SLinus Torvalds .llseek = seq_lseek, 28221da177e4SLinus Torvalds .release = seq_release_private, 28231da177e4SLinus Torvalds }; 28241da177e4SLinus Torvalds 28251da177e4SLinus Torvalds int __init if6_proc_init(void) 28261da177e4SLinus Torvalds { 2827457c4cbcSEric W. Biederman if (!proc_net_fops_create(&init_net, "if_inet6", S_IRUGO, &if6_fops)) 28281da177e4SLinus Torvalds return -ENOMEM; 28291da177e4SLinus Torvalds return 0; 28301da177e4SLinus Torvalds } 28311da177e4SLinus Torvalds 28321da177e4SLinus Torvalds void if6_proc_exit(void) 28331da177e4SLinus Torvalds { 2834457c4cbcSEric W. Biederman proc_net_remove(&init_net, "if_inet6"); 28351da177e4SLinus Torvalds } 28361da177e4SLinus Torvalds #endif /* CONFIG_PROC_FS */ 28371da177e4SLinus Torvalds 283859fbb3a6SMasahide NAKAMURA #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) 28393b9f9a1cSNoriaki TAKAMIYA /* Check if address is a home address configured on any interface. */ 28403b9f9a1cSNoriaki TAKAMIYA int ipv6_chk_home_addr(struct in6_addr *addr) 28413b9f9a1cSNoriaki TAKAMIYA { 28423b9f9a1cSNoriaki TAKAMIYA int ret = 0; 28433b9f9a1cSNoriaki TAKAMIYA struct inet6_ifaddr * ifp; 28443b9f9a1cSNoriaki TAKAMIYA u8 hash = ipv6_addr_hash(addr); 28453b9f9a1cSNoriaki TAKAMIYA read_lock_bh(&addrconf_hash_lock); 28463b9f9a1cSNoriaki TAKAMIYA for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) { 28473b9f9a1cSNoriaki TAKAMIYA if (ipv6_addr_cmp(&ifp->addr, addr) == 0 && 28483b9f9a1cSNoriaki TAKAMIYA (ifp->flags & IFA_F_HOMEADDRESS)) { 28493b9f9a1cSNoriaki TAKAMIYA ret = 1; 28503b9f9a1cSNoriaki TAKAMIYA break; 28513b9f9a1cSNoriaki TAKAMIYA } 28523b9f9a1cSNoriaki TAKAMIYA } 28533b9f9a1cSNoriaki TAKAMIYA read_unlock_bh(&addrconf_hash_lock); 28543b9f9a1cSNoriaki TAKAMIYA return ret; 28553b9f9a1cSNoriaki TAKAMIYA } 28563b9f9a1cSNoriaki TAKAMIYA #endif 28573b9f9a1cSNoriaki TAKAMIYA 28581da177e4SLinus Torvalds /* 28591da177e4SLinus Torvalds * Periodic address status verification 28601da177e4SLinus Torvalds */ 28611da177e4SLinus Torvalds 28621da177e4SLinus Torvalds static void addrconf_verify(unsigned long foo) 28631da177e4SLinus Torvalds { 28641da177e4SLinus Torvalds struct inet6_ifaddr *ifp; 28651da177e4SLinus Torvalds unsigned long now, next; 28661da177e4SLinus Torvalds int i; 28671da177e4SLinus Torvalds 28681da177e4SLinus Torvalds spin_lock_bh(&addrconf_verify_lock); 28691da177e4SLinus Torvalds now = jiffies; 28701da177e4SLinus Torvalds next = now + ADDR_CHECK_FREQUENCY; 28711da177e4SLinus Torvalds 28721da177e4SLinus Torvalds del_timer(&addr_chk_timer); 28731da177e4SLinus Torvalds 28741da177e4SLinus Torvalds for (i=0; i < IN6_ADDR_HSIZE; i++) { 28751da177e4SLinus Torvalds 28761da177e4SLinus Torvalds restart: 28775d5780dfSYan Zheng read_lock(&addrconf_hash_lock); 28781da177e4SLinus Torvalds for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) { 28791da177e4SLinus Torvalds unsigned long age; 28801da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 28811da177e4SLinus Torvalds unsigned long regen_advance; 28821da177e4SLinus Torvalds #endif 28831da177e4SLinus Torvalds 28841da177e4SLinus Torvalds if (ifp->flags & IFA_F_PERMANENT) 28851da177e4SLinus Torvalds continue; 28861da177e4SLinus Torvalds 28871da177e4SLinus Torvalds spin_lock(&ifp->lock); 28881da177e4SLinus Torvalds age = (now - ifp->tstamp) / HZ; 28891da177e4SLinus Torvalds 28901da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 28911da177e4SLinus Torvalds regen_advance = ifp->idev->cnf.regen_max_retry * 28921da177e4SLinus Torvalds ifp->idev->cnf.dad_transmits * 28931da177e4SLinus Torvalds ifp->idev->nd_parms->retrans_time / HZ; 28941da177e4SLinus Torvalds #endif 28951da177e4SLinus Torvalds 28968f27ebb9SYOSHIFUJI Hideaki if (ifp->valid_lft != INFINITY_LIFE_TIME && 28978f27ebb9SYOSHIFUJI Hideaki age >= ifp->valid_lft) { 28981da177e4SLinus Torvalds spin_unlock(&ifp->lock); 28991da177e4SLinus Torvalds in6_ifa_hold(ifp); 29005d5780dfSYan Zheng read_unlock(&addrconf_hash_lock); 29011da177e4SLinus Torvalds ipv6_del_addr(ifp); 29021da177e4SLinus Torvalds goto restart; 29038f27ebb9SYOSHIFUJI Hideaki } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { 29048f27ebb9SYOSHIFUJI Hideaki spin_unlock(&ifp->lock); 29058f27ebb9SYOSHIFUJI Hideaki continue; 29061da177e4SLinus Torvalds } else if (age >= ifp->prefered_lft) { 29071da177e4SLinus Torvalds /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */ 29081da177e4SLinus Torvalds int deprecate = 0; 29091da177e4SLinus Torvalds 29101da177e4SLinus Torvalds if (!(ifp->flags&IFA_F_DEPRECATED)) { 29111da177e4SLinus Torvalds deprecate = 1; 29121da177e4SLinus Torvalds ifp->flags |= IFA_F_DEPRECATED; 29131da177e4SLinus Torvalds } 29141da177e4SLinus Torvalds 29151da177e4SLinus Torvalds if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) 29161da177e4SLinus Torvalds next = ifp->tstamp + ifp->valid_lft * HZ; 29171da177e4SLinus Torvalds 29181da177e4SLinus Torvalds spin_unlock(&ifp->lock); 29191da177e4SLinus Torvalds 29201da177e4SLinus Torvalds if (deprecate) { 29211da177e4SLinus Torvalds in6_ifa_hold(ifp); 29225d5780dfSYan Zheng read_unlock(&addrconf_hash_lock); 29231da177e4SLinus Torvalds 29241da177e4SLinus Torvalds ipv6_ifa_notify(0, ifp); 29251da177e4SLinus Torvalds in6_ifa_put(ifp); 29261da177e4SLinus Torvalds goto restart; 29271da177e4SLinus Torvalds } 29281da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 29291da177e4SLinus Torvalds } else if ((ifp->flags&IFA_F_TEMPORARY) && 29301da177e4SLinus Torvalds !(ifp->flags&IFA_F_TENTATIVE)) { 29311da177e4SLinus Torvalds if (age >= ifp->prefered_lft - regen_advance) { 29321da177e4SLinus Torvalds struct inet6_ifaddr *ifpub = ifp->ifpub; 29331da177e4SLinus Torvalds if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) 29341da177e4SLinus Torvalds next = ifp->tstamp + ifp->prefered_lft * HZ; 29351da177e4SLinus Torvalds if (!ifp->regen_count && ifpub) { 29361da177e4SLinus Torvalds ifp->regen_count++; 29371da177e4SLinus Torvalds in6_ifa_hold(ifp); 29381da177e4SLinus Torvalds in6_ifa_hold(ifpub); 29391da177e4SLinus Torvalds spin_unlock(&ifp->lock); 29405d5780dfSYan Zheng read_unlock(&addrconf_hash_lock); 2941291d809bSHiroyuki YAMAMORI spin_lock(&ifpub->lock); 2942291d809bSHiroyuki YAMAMORI ifpub->regen_count = 0; 2943291d809bSHiroyuki YAMAMORI spin_unlock(&ifpub->lock); 29441da177e4SLinus Torvalds ipv6_create_tempaddr(ifpub, ifp); 29451da177e4SLinus Torvalds in6_ifa_put(ifpub); 29461da177e4SLinus Torvalds in6_ifa_put(ifp); 29471da177e4SLinus Torvalds goto restart; 29481da177e4SLinus Torvalds } 29491da177e4SLinus Torvalds } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) 29501da177e4SLinus Torvalds next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; 29511da177e4SLinus Torvalds spin_unlock(&ifp->lock); 29521da177e4SLinus Torvalds #endif 29531da177e4SLinus Torvalds } else { 29541da177e4SLinus Torvalds /* ifp->prefered_lft <= ifp->valid_lft */ 29551da177e4SLinus Torvalds if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) 29561da177e4SLinus Torvalds next = ifp->tstamp + ifp->prefered_lft * HZ; 29571da177e4SLinus Torvalds spin_unlock(&ifp->lock); 29581da177e4SLinus Torvalds } 29591da177e4SLinus Torvalds } 29605d5780dfSYan Zheng read_unlock(&addrconf_hash_lock); 29611da177e4SLinus Torvalds } 29621da177e4SLinus Torvalds 29631da177e4SLinus Torvalds addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next; 29641da177e4SLinus Torvalds add_timer(&addr_chk_timer); 29651da177e4SLinus Torvalds spin_unlock_bh(&addrconf_verify_lock); 29661da177e4SLinus Torvalds } 29671da177e4SLinus Torvalds 2968461d8837SThomas Graf static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) 2969461d8837SThomas Graf { 2970461d8837SThomas Graf struct in6_addr *pfx = NULL; 2971461d8837SThomas Graf 2972461d8837SThomas Graf if (addr) 2973461d8837SThomas Graf pfx = nla_data(addr); 2974461d8837SThomas Graf 2975461d8837SThomas Graf if (local) { 2976461d8837SThomas Graf if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) 2977461d8837SThomas Graf pfx = NULL; 2978461d8837SThomas Graf else 2979461d8837SThomas Graf pfx = nla_data(local); 2980461d8837SThomas Graf } 2981461d8837SThomas Graf 2982461d8837SThomas Graf return pfx; 2983461d8837SThomas Graf } 2984461d8837SThomas Graf 2985ef7c79edSPatrick McHardy static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { 2986461d8837SThomas Graf [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, 2987461d8837SThomas Graf [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, 2988461d8837SThomas Graf [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, 2989461d8837SThomas Graf }; 2990461d8837SThomas Graf 29911da177e4SLinus Torvalds static int 29921da177e4SLinus Torvalds inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 29931da177e4SLinus Torvalds { 2994b854272bSDenis V. Lunev struct net *net = skb->sk->sk_net; 2995b933f716SThomas Graf struct ifaddrmsg *ifm; 2996b933f716SThomas Graf struct nlattr *tb[IFA_MAX+1]; 29971da177e4SLinus Torvalds struct in6_addr *pfx; 2998b933f716SThomas Graf int err; 29991da177e4SLinus Torvalds 3000b854272bSDenis V. Lunev if (net != &init_net) 3001b854272bSDenis V. Lunev return -EINVAL; 3002b854272bSDenis V. Lunev 3003b933f716SThomas Graf err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); 3004b933f716SThomas Graf if (err < 0) 3005b933f716SThomas Graf return err; 3006b933f716SThomas Graf 3007b933f716SThomas Graf ifm = nlmsg_data(nlh); 3008b933f716SThomas Graf pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); 30091da177e4SLinus Torvalds if (pfx == NULL) 30101da177e4SLinus Torvalds return -EINVAL; 30111da177e4SLinus Torvalds 30121da177e4SLinus Torvalds return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen); 30131da177e4SLinus Torvalds } 30141da177e4SLinus Torvalds 301555ebaef1SNoriaki TAKAMIYA static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, 301655ebaef1SNoriaki TAKAMIYA u32 prefered_lft, u32 valid_lft) 3017081bba5bSNoriaki TAKAMIYA { 301846d48046SYOSHIFUJI Hideaki u32 flags = RTF_EXPIRES; 301946d48046SYOSHIFUJI Hideaki 3020081bba5bSNoriaki TAKAMIYA if (!valid_lft || (prefered_lft > valid_lft)) 3021081bba5bSNoriaki TAKAMIYA return -EINVAL; 3022081bba5bSNoriaki TAKAMIYA 302346d48046SYOSHIFUJI Hideaki if (valid_lft == INFINITY_LIFE_TIME) { 302455ebaef1SNoriaki TAKAMIYA ifa_flags |= IFA_F_PERMANENT; 302546d48046SYOSHIFUJI Hideaki flags = 0; 302646d48046SYOSHIFUJI Hideaki } else if (valid_lft >= 0x7FFFFFFF/HZ) 3027081bba5bSNoriaki TAKAMIYA valid_lft = 0x7FFFFFFF/HZ; 3028081bba5bSNoriaki TAKAMIYA 3029081bba5bSNoriaki TAKAMIYA if (prefered_lft == 0) 303055ebaef1SNoriaki TAKAMIYA ifa_flags |= IFA_F_DEPRECATED; 3031081bba5bSNoriaki TAKAMIYA else if ((prefered_lft >= 0x7FFFFFFF/HZ) && 3032081bba5bSNoriaki TAKAMIYA (prefered_lft != INFINITY_LIFE_TIME)) 3033081bba5bSNoriaki TAKAMIYA prefered_lft = 0x7FFFFFFF/HZ; 3034081bba5bSNoriaki TAKAMIYA 3035081bba5bSNoriaki TAKAMIYA spin_lock_bh(&ifp->lock); 30363b9f9a1cSNoriaki TAKAMIYA ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; 3037081bba5bSNoriaki TAKAMIYA ifp->tstamp = jiffies; 3038081bba5bSNoriaki TAKAMIYA ifp->valid_lft = valid_lft; 3039081bba5bSNoriaki TAKAMIYA ifp->prefered_lft = prefered_lft; 3040081bba5bSNoriaki TAKAMIYA 3041081bba5bSNoriaki TAKAMIYA spin_unlock_bh(&ifp->lock); 3042081bba5bSNoriaki TAKAMIYA if (!(ifp->flags&IFA_F_TENTATIVE)) 3043081bba5bSNoriaki TAKAMIYA ipv6_ifa_notify(0, ifp); 3044081bba5bSNoriaki TAKAMIYA 304546d48046SYOSHIFUJI Hideaki addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, 304646d48046SYOSHIFUJI Hideaki jiffies_to_clock_t(valid_lft * HZ), flags); 3047081bba5bSNoriaki TAKAMIYA addrconf_verify(0); 3048081bba5bSNoriaki TAKAMIYA 3049081bba5bSNoriaki TAKAMIYA return 0; 3050081bba5bSNoriaki TAKAMIYA } 3051081bba5bSNoriaki TAKAMIYA 3052081bba5bSNoriaki TAKAMIYA static int 30531da177e4SLinus Torvalds inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 30541da177e4SLinus Torvalds { 3055b854272bSDenis V. Lunev struct net *net = skb->sk->sk_net; 3056461d8837SThomas Graf struct ifaddrmsg *ifm; 3057461d8837SThomas Graf struct nlattr *tb[IFA_MAX+1]; 30581da177e4SLinus Torvalds struct in6_addr *pfx; 30597198f8ceSThomas Graf struct inet6_ifaddr *ifa; 30607198f8ceSThomas Graf struct net_device *dev; 306155ebaef1SNoriaki TAKAMIYA u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; 306255ebaef1SNoriaki TAKAMIYA u8 ifa_flags; 3063461d8837SThomas Graf int err; 30641da177e4SLinus Torvalds 3065b854272bSDenis V. Lunev if (net != &init_net) 3066b854272bSDenis V. Lunev return -EINVAL; 3067b854272bSDenis V. Lunev 3068461d8837SThomas Graf err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); 3069461d8837SThomas Graf if (err < 0) 3070461d8837SThomas Graf return err; 3071461d8837SThomas Graf 3072461d8837SThomas Graf ifm = nlmsg_data(nlh); 3073461d8837SThomas Graf pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); 30741da177e4SLinus Torvalds if (pfx == NULL) 30751da177e4SLinus Torvalds return -EINVAL; 30761da177e4SLinus Torvalds 3077461d8837SThomas Graf if (tb[IFA_CACHEINFO]) { 30780778769dSNoriaki TAKAMIYA struct ifa_cacheinfo *ci; 3079461d8837SThomas Graf 3080461d8837SThomas Graf ci = nla_data(tb[IFA_CACHEINFO]); 30810778769dSNoriaki TAKAMIYA valid_lft = ci->ifa_valid; 3082461d8837SThomas Graf preferred_lft = ci->ifa_prefered; 3083461d8837SThomas Graf } else { 3084461d8837SThomas Graf preferred_lft = INFINITY_LIFE_TIME; 3085461d8837SThomas Graf valid_lft = INFINITY_LIFE_TIME; 30860778769dSNoriaki TAKAMIYA } 30870778769dSNoriaki TAKAMIYA 3088881d966bSEric W. Biederman dev = __dev_get_by_index(&init_net, ifm->ifa_index); 30897198f8ceSThomas Graf if (dev == NULL) 30907198f8ceSThomas Graf return -ENODEV; 3091081bba5bSNoriaki TAKAMIYA 309255ebaef1SNoriaki TAKAMIYA /* We ignore other flags so far. */ 30933b9f9a1cSNoriaki TAKAMIYA ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); 309455ebaef1SNoriaki TAKAMIYA 30957198f8ceSThomas Graf ifa = ipv6_get_ifaddr(pfx, dev, 1); 30967198f8ceSThomas Graf if (ifa == NULL) { 30977198f8ceSThomas Graf /* 30987198f8ceSThomas Graf * It would be best to check for !NLM_F_CREATE here but 30997198f8ceSThomas Graf * userspace alreay relies on not having to provide this. 31007198f8ceSThomas Graf */ 31010778769dSNoriaki TAKAMIYA return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen, 310255ebaef1SNoriaki TAKAMIYA ifa_flags, preferred_lft, valid_lft); 31031da177e4SLinus Torvalds } 31041da177e4SLinus Torvalds 31057198f8ceSThomas Graf if (nlh->nlmsg_flags & NLM_F_EXCL || 31067198f8ceSThomas Graf !(nlh->nlmsg_flags & NLM_F_REPLACE)) 31077198f8ceSThomas Graf err = -EEXIST; 31087198f8ceSThomas Graf else 310955ebaef1SNoriaki TAKAMIYA err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); 31107198f8ceSThomas Graf 31117198f8ceSThomas Graf in6_ifa_put(ifa); 31127198f8ceSThomas Graf 31137198f8ceSThomas Graf return err; 31147198f8ceSThomas Graf } 31157198f8ceSThomas Graf 3116101bb229SThomas Graf static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, 3117101bb229SThomas Graf u8 scope, int ifindex) 3118101bb229SThomas Graf { 3119101bb229SThomas Graf struct ifaddrmsg *ifm; 3120101bb229SThomas Graf 3121101bb229SThomas Graf ifm = nlmsg_data(nlh); 3122101bb229SThomas Graf ifm->ifa_family = AF_INET6; 3123101bb229SThomas Graf ifm->ifa_prefixlen = prefixlen; 3124101bb229SThomas Graf ifm->ifa_flags = flags; 3125101bb229SThomas Graf ifm->ifa_scope = scope; 3126101bb229SThomas Graf ifm->ifa_index = ifindex; 3127101bb229SThomas Graf } 3128101bb229SThomas Graf 312985486af0SThomas Graf static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, 313085486af0SThomas Graf unsigned long tstamp, u32 preferred, u32 valid) 313185486af0SThomas Graf { 313285486af0SThomas Graf struct ifa_cacheinfo ci; 313385486af0SThomas Graf 313485486af0SThomas Graf ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100 313585486af0SThomas Graf + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); 313685486af0SThomas Graf ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100 313785486af0SThomas Graf + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); 313885486af0SThomas Graf ci.ifa_prefered = preferred; 313985486af0SThomas Graf ci.ifa_valid = valid; 314085486af0SThomas Graf 314185486af0SThomas Graf return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); 314285486af0SThomas Graf } 314385486af0SThomas Graf 3144101bb229SThomas Graf static inline int rt_scope(int ifa_scope) 3145101bb229SThomas Graf { 3146101bb229SThomas Graf if (ifa_scope & IFA_HOST) 3147101bb229SThomas Graf return RT_SCOPE_HOST; 3148101bb229SThomas Graf else if (ifa_scope & IFA_LINK) 3149101bb229SThomas Graf return RT_SCOPE_LINK; 3150101bb229SThomas Graf else if (ifa_scope & IFA_SITE) 3151101bb229SThomas Graf return RT_SCOPE_SITE; 3152101bb229SThomas Graf else 3153101bb229SThomas Graf return RT_SCOPE_UNIVERSE; 3154101bb229SThomas Graf } 3155101bb229SThomas Graf 31560ab6803bSThomas Graf static inline int inet6_ifaddr_msgsize(void) 31570ab6803bSThomas Graf { 3158339bf98fSThomas Graf return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) 3159339bf98fSThomas Graf + nla_total_size(16) /* IFA_ADDRESS */ 3160339bf98fSThomas Graf + nla_total_size(sizeof(struct ifa_cacheinfo)); 31610ab6803bSThomas Graf } 3162c5396a31SYOSHIFUJI Hideaki 31631da177e4SLinus Torvalds static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, 3164b6544c0bSJamal Hadi Salim u32 pid, u32 seq, int event, unsigned int flags) 31651da177e4SLinus Torvalds { 31661da177e4SLinus Torvalds struct nlmsghdr *nlh; 316785486af0SThomas Graf u32 preferred, valid; 31681da177e4SLinus Torvalds 31690ab6803bSThomas Graf nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); 31700ab6803bSThomas Graf if (nlh == NULL) 317126932566SPatrick McHardy return -EMSGSIZE; 31720ab6803bSThomas Graf 3173101bb229SThomas Graf put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), 3174101bb229SThomas Graf ifa->idev->dev->ifindex); 3175101bb229SThomas Graf 31761da177e4SLinus Torvalds if (!(ifa->flags&IFA_F_PERMANENT)) { 317785486af0SThomas Graf preferred = ifa->prefered_lft; 317885486af0SThomas Graf valid = ifa->valid_lft; 317985486af0SThomas Graf if (preferred != INFINITY_LIFE_TIME) { 31801da177e4SLinus Torvalds long tval = (jiffies - ifa->tstamp)/HZ; 318185486af0SThomas Graf preferred -= tval; 318285486af0SThomas Graf if (valid != INFINITY_LIFE_TIME) 318385486af0SThomas Graf valid -= tval; 31841da177e4SLinus Torvalds } 31851da177e4SLinus Torvalds } else { 318685486af0SThomas Graf preferred = INFINITY_LIFE_TIME; 318785486af0SThomas Graf valid = INFINITY_LIFE_TIME; 31881da177e4SLinus Torvalds } 318985486af0SThomas Graf 31900ab6803bSThomas Graf if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || 319126932566SPatrick McHardy put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { 319226932566SPatrick McHardy nlmsg_cancel(skb, nlh); 319326932566SPatrick McHardy return -EMSGSIZE; 319426932566SPatrick McHardy } 319585486af0SThomas Graf 31960ab6803bSThomas Graf return nlmsg_end(skb, nlh); 31971da177e4SLinus Torvalds } 31981da177e4SLinus Torvalds 31991da177e4SLinus Torvalds static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, 3200e431b8c0SJamal Hadi Salim u32 pid, u32 seq, int event, u16 flags) 32011da177e4SLinus Torvalds { 32021da177e4SLinus Torvalds struct nlmsghdr *nlh; 3203101bb229SThomas Graf u8 scope = RT_SCOPE_UNIVERSE; 3204101bb229SThomas Graf int ifindex = ifmca->idev->dev->ifindex; 32051da177e4SLinus Torvalds 32061da177e4SLinus Torvalds if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) 3207101bb229SThomas Graf scope = RT_SCOPE_SITE; 3208101bb229SThomas Graf 32090ab6803bSThomas Graf nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); 32100ab6803bSThomas Graf if (nlh == NULL) 321126932566SPatrick McHardy return -EMSGSIZE; 32120ab6803bSThomas Graf 3213101bb229SThomas Graf put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); 32140ab6803bSThomas Graf if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || 32150ab6803bSThomas Graf put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, 321626932566SPatrick McHardy INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { 321726932566SPatrick McHardy nlmsg_cancel(skb, nlh); 321826932566SPatrick McHardy return -EMSGSIZE; 321926932566SPatrick McHardy } 322085486af0SThomas Graf 32210ab6803bSThomas Graf return nlmsg_end(skb, nlh); 32221da177e4SLinus Torvalds } 32231da177e4SLinus Torvalds 32241da177e4SLinus Torvalds static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, 3225b6544c0bSJamal Hadi Salim u32 pid, u32 seq, int event, unsigned int flags) 32261da177e4SLinus Torvalds { 32271da177e4SLinus Torvalds struct nlmsghdr *nlh; 3228101bb229SThomas Graf u8 scope = RT_SCOPE_UNIVERSE; 3229101bb229SThomas Graf int ifindex = ifaca->aca_idev->dev->ifindex; 32301da177e4SLinus Torvalds 32311da177e4SLinus Torvalds if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) 3232101bb229SThomas Graf scope = RT_SCOPE_SITE; 3233101bb229SThomas Graf 32340ab6803bSThomas Graf nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); 32350ab6803bSThomas Graf if (nlh == NULL) 323626932566SPatrick McHardy return -EMSGSIZE; 32370ab6803bSThomas Graf 3238101bb229SThomas Graf put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); 32390ab6803bSThomas Graf if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || 32400ab6803bSThomas Graf put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, 324126932566SPatrick McHardy INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { 324226932566SPatrick McHardy nlmsg_cancel(skb, nlh); 324326932566SPatrick McHardy return -EMSGSIZE; 324426932566SPatrick McHardy } 324585486af0SThomas Graf 32460ab6803bSThomas Graf return nlmsg_end(skb, nlh); 32471da177e4SLinus Torvalds } 32481da177e4SLinus Torvalds 32491da177e4SLinus Torvalds enum addr_type_t 32501da177e4SLinus Torvalds { 32511da177e4SLinus Torvalds UNICAST_ADDR, 32521da177e4SLinus Torvalds MULTICAST_ADDR, 32531da177e4SLinus Torvalds ANYCAST_ADDR, 32541da177e4SLinus Torvalds }; 32551da177e4SLinus Torvalds 32561da177e4SLinus Torvalds static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, 32571da177e4SLinus Torvalds enum addr_type_t type) 32581da177e4SLinus Torvalds { 32591da177e4SLinus Torvalds int idx, ip_idx; 32601da177e4SLinus Torvalds int s_idx, s_ip_idx; 32611da177e4SLinus Torvalds int err = 1; 32621da177e4SLinus Torvalds struct net_device *dev; 32631da177e4SLinus Torvalds struct inet6_dev *idev = NULL; 32641da177e4SLinus Torvalds struct inet6_ifaddr *ifa; 32651da177e4SLinus Torvalds struct ifmcaddr6 *ifmca; 32661da177e4SLinus Torvalds struct ifacaddr6 *ifaca; 32671da177e4SLinus Torvalds 32681da177e4SLinus Torvalds s_idx = cb->args[0]; 32691da177e4SLinus Torvalds s_ip_idx = ip_idx = cb->args[1]; 32701da177e4SLinus Torvalds 32717562f876SPavel Emelianov idx = 0; 3272881d966bSEric W. Biederman for_each_netdev(&init_net, dev) { 32731da177e4SLinus Torvalds if (idx < s_idx) 32747562f876SPavel Emelianov goto cont; 32751da177e4SLinus Torvalds if (idx > s_idx) 32761da177e4SLinus Torvalds s_ip_idx = 0; 32771da177e4SLinus Torvalds ip_idx = 0; 32781da177e4SLinus Torvalds if ((idev = in6_dev_get(dev)) == NULL) 32797562f876SPavel Emelianov goto cont; 32801da177e4SLinus Torvalds read_lock_bh(&idev->lock); 32811da177e4SLinus Torvalds switch (type) { 32821da177e4SLinus Torvalds case UNICAST_ADDR: 3283ae9cda5dSYOSHIFUJI Hideaki /* unicast address incl. temp addr */ 32841da177e4SLinus Torvalds for (ifa = idev->addr_list; ifa; 32851da177e4SLinus Torvalds ifa = ifa->if_next, ip_idx++) { 32861da177e4SLinus Torvalds if (ip_idx < s_ip_idx) 32871da177e4SLinus Torvalds continue; 32881da177e4SLinus Torvalds if ((err = inet6_fill_ifaddr(skb, ifa, 32891da177e4SLinus Torvalds NETLINK_CB(cb->skb).pid, 3290b6544c0bSJamal Hadi Salim cb->nlh->nlmsg_seq, RTM_NEWADDR, 3291b6544c0bSJamal Hadi Salim NLM_F_MULTI)) <= 0) 32921da177e4SLinus Torvalds goto done; 32931da177e4SLinus Torvalds } 32941da177e4SLinus Torvalds break; 32951da177e4SLinus Torvalds case MULTICAST_ADDR: 32961da177e4SLinus Torvalds /* multicast address */ 32971da177e4SLinus Torvalds for (ifmca = idev->mc_list; ifmca; 32981da177e4SLinus Torvalds ifmca = ifmca->next, ip_idx++) { 32991da177e4SLinus Torvalds if (ip_idx < s_ip_idx) 33001da177e4SLinus Torvalds continue; 33011da177e4SLinus Torvalds if ((err = inet6_fill_ifmcaddr(skb, ifmca, 33021da177e4SLinus Torvalds NETLINK_CB(cb->skb).pid, 3303b6544c0bSJamal Hadi Salim cb->nlh->nlmsg_seq, RTM_GETMULTICAST, 3304b6544c0bSJamal Hadi Salim NLM_F_MULTI)) <= 0) 33051da177e4SLinus Torvalds goto done; 33061da177e4SLinus Torvalds } 33071da177e4SLinus Torvalds break; 33081da177e4SLinus Torvalds case ANYCAST_ADDR: 33091da177e4SLinus Torvalds /* anycast address */ 33101da177e4SLinus Torvalds for (ifaca = idev->ac_list; ifaca; 33111da177e4SLinus Torvalds ifaca = ifaca->aca_next, ip_idx++) { 33121da177e4SLinus Torvalds if (ip_idx < s_ip_idx) 33131da177e4SLinus Torvalds continue; 33141da177e4SLinus Torvalds if ((err = inet6_fill_ifacaddr(skb, ifaca, 33151da177e4SLinus Torvalds NETLINK_CB(cb->skb).pid, 3316b6544c0bSJamal Hadi Salim cb->nlh->nlmsg_seq, RTM_GETANYCAST, 3317b6544c0bSJamal Hadi Salim NLM_F_MULTI)) <= 0) 33181da177e4SLinus Torvalds goto done; 33191da177e4SLinus Torvalds } 33201da177e4SLinus Torvalds break; 33211da177e4SLinus Torvalds default: 33221da177e4SLinus Torvalds break; 33231da177e4SLinus Torvalds } 33241da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 33251da177e4SLinus Torvalds in6_dev_put(idev); 33267562f876SPavel Emelianov cont: 33277562f876SPavel Emelianov idx++; 33281da177e4SLinus Torvalds } 33291da177e4SLinus Torvalds done: 33301da177e4SLinus Torvalds if (err <= 0) { 33311da177e4SLinus Torvalds read_unlock_bh(&idev->lock); 33321da177e4SLinus Torvalds in6_dev_put(idev); 33331da177e4SLinus Torvalds } 33341da177e4SLinus Torvalds cb->args[0] = idx; 33351da177e4SLinus Torvalds cb->args[1] = ip_idx; 33361da177e4SLinus Torvalds return skb->len; 33371da177e4SLinus Torvalds } 33381da177e4SLinus Torvalds 33391da177e4SLinus Torvalds static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) 33401da177e4SLinus Torvalds { 3341b854272bSDenis V. Lunev struct net *net = skb->sk->sk_net; 33421da177e4SLinus Torvalds enum addr_type_t type = UNICAST_ADDR; 3343b854272bSDenis V. Lunev 3344b854272bSDenis V. Lunev if (net != &init_net) 3345b854272bSDenis V. Lunev return 0; 3346b854272bSDenis V. Lunev 33471da177e4SLinus Torvalds return inet6_dump_addr(skb, cb, type); 33481da177e4SLinus Torvalds } 33491da177e4SLinus Torvalds 33501da177e4SLinus Torvalds static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) 33511da177e4SLinus Torvalds { 3352b854272bSDenis V. Lunev struct net *net = skb->sk->sk_net; 33531da177e4SLinus Torvalds enum addr_type_t type = MULTICAST_ADDR; 3354b854272bSDenis V. Lunev 3355b854272bSDenis V. Lunev if (net != &init_net) 3356b854272bSDenis V. Lunev return 0; 3357b854272bSDenis V. Lunev 33581da177e4SLinus Torvalds return inet6_dump_addr(skb, cb, type); 33591da177e4SLinus Torvalds } 33601da177e4SLinus Torvalds 33611da177e4SLinus Torvalds 33621da177e4SLinus Torvalds static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) 33631da177e4SLinus Torvalds { 3364b854272bSDenis V. Lunev struct net *net = skb->sk->sk_net; 33651da177e4SLinus Torvalds enum addr_type_t type = ANYCAST_ADDR; 3366b854272bSDenis V. Lunev 3367b854272bSDenis V. Lunev if (net != &init_net) 3368b854272bSDenis V. Lunev return 0; 3369b854272bSDenis V. Lunev 33701da177e4SLinus Torvalds return inet6_dump_addr(skb, cb, type); 33711da177e4SLinus Torvalds } 33721da177e4SLinus Torvalds 33731b29fc2cSThomas Graf static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh, 33741b29fc2cSThomas Graf void *arg) 33756c223828SNoriaki TAKAMIYA { 3376b854272bSDenis V. Lunev struct net *net = in_skb->sk->sk_net; 33771b29fc2cSThomas Graf struct ifaddrmsg *ifm; 33781b29fc2cSThomas Graf struct nlattr *tb[IFA_MAX+1]; 33796c223828SNoriaki TAKAMIYA struct in6_addr *addr = NULL; 33806c223828SNoriaki TAKAMIYA struct net_device *dev = NULL; 33816c223828SNoriaki TAKAMIYA struct inet6_ifaddr *ifa; 33826c223828SNoriaki TAKAMIYA struct sk_buff *skb; 33836c223828SNoriaki TAKAMIYA int err; 33846c223828SNoriaki TAKAMIYA 3385b854272bSDenis V. Lunev if (net != &init_net) 3386b854272bSDenis V. Lunev return -EINVAL; 3387b854272bSDenis V. Lunev 33881b29fc2cSThomas Graf err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); 33891b29fc2cSThomas Graf if (err < 0) 33901b29fc2cSThomas Graf goto errout; 33916c223828SNoriaki TAKAMIYA 33921b29fc2cSThomas Graf addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); 33931b29fc2cSThomas Graf if (addr == NULL) { 33941b29fc2cSThomas Graf err = -EINVAL; 33951b29fc2cSThomas Graf goto errout; 33961b29fc2cSThomas Graf } 33971b29fc2cSThomas Graf 33981b29fc2cSThomas Graf ifm = nlmsg_data(nlh); 33996c223828SNoriaki TAKAMIYA if (ifm->ifa_index) 3400881d966bSEric W. Biederman dev = __dev_get_by_index(&init_net, ifm->ifa_index); 34016c223828SNoriaki TAKAMIYA 34021b29fc2cSThomas Graf if ((ifa = ipv6_get_ifaddr(addr, dev, 1)) == NULL) { 34031b29fc2cSThomas Graf err = -EADDRNOTAVAIL; 34041b29fc2cSThomas Graf goto errout; 34056c223828SNoriaki TAKAMIYA } 34066c223828SNoriaki TAKAMIYA 34070ab6803bSThomas Graf if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) { 34081b29fc2cSThomas Graf err = -ENOBUFS; 34091b29fc2cSThomas Graf goto errout_ifa; 34101b29fc2cSThomas Graf } 34111b29fc2cSThomas Graf 34126c223828SNoriaki TAKAMIYA err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, 34136c223828SNoriaki TAKAMIYA nlh->nlmsg_seq, RTM_NEWADDR, 0); 341426932566SPatrick McHardy if (err < 0) { 341526932566SPatrick McHardy /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ 341626932566SPatrick McHardy WARN_ON(err == -EMSGSIZE); 341726932566SPatrick McHardy kfree_skb(skb); 341826932566SPatrick McHardy goto errout_ifa; 341926932566SPatrick McHardy } 342097c53cacSDenis V. Lunev err = rtnl_unicast(skb, &init_net, NETLINK_CB(in_skb).pid); 34211b29fc2cSThomas Graf errout_ifa: 34226c223828SNoriaki TAKAMIYA in6_ifa_put(ifa); 34231b29fc2cSThomas Graf errout: 34246c223828SNoriaki TAKAMIYA return err; 34256c223828SNoriaki TAKAMIYA } 34266c223828SNoriaki TAKAMIYA 34271da177e4SLinus Torvalds static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) 34281da177e4SLinus Torvalds { 34291da177e4SLinus Torvalds struct sk_buff *skb; 34305d620266SThomas Graf int err = -ENOBUFS; 34311da177e4SLinus Torvalds 34320ab6803bSThomas Graf skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); 34335d620266SThomas Graf if (skb == NULL) 34345d620266SThomas Graf goto errout; 34355d620266SThomas Graf 34365d620266SThomas Graf err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); 343726932566SPatrick McHardy if (err < 0) { 343826932566SPatrick McHardy /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ 343926932566SPatrick McHardy WARN_ON(err == -EMSGSIZE); 344026932566SPatrick McHardy kfree_skb(skb); 344126932566SPatrick McHardy goto errout; 344226932566SPatrick McHardy } 344397c53cacSDenis V. Lunev err = rtnl_notify(skb, &init_net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); 34445d620266SThomas Graf errout: 34455d620266SThomas Graf if (err < 0) 344697c53cacSDenis V. Lunev rtnl_set_sk_err(&init_net, RTNLGRP_IPV6_IFADDR, err); 34471da177e4SLinus Torvalds } 34481da177e4SLinus Torvalds 3449b6f99a21SDave Jones static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, 34501da177e4SLinus Torvalds __s32 *array, int bytes) 34511da177e4SLinus Torvalds { 345204561c1fSThomas Graf BUG_ON(bytes < (DEVCONF_MAX * 4)); 345304561c1fSThomas Graf 34541da177e4SLinus Torvalds memset(array, 0, bytes); 34551da177e4SLinus Torvalds array[DEVCONF_FORWARDING] = cnf->forwarding; 34561da177e4SLinus Torvalds array[DEVCONF_HOPLIMIT] = cnf->hop_limit; 34571da177e4SLinus Torvalds array[DEVCONF_MTU6] = cnf->mtu6; 34581da177e4SLinus Torvalds array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; 34591da177e4SLinus Torvalds array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; 34601da177e4SLinus Torvalds array[DEVCONF_AUTOCONF] = cnf->autoconf; 34611da177e4SLinus Torvalds array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; 34621da177e4SLinus Torvalds array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; 34631da177e4SLinus Torvalds array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; 34641da177e4SLinus Torvalds array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; 34651da177e4SLinus Torvalds array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; 34661da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 34671da177e4SLinus Torvalds array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; 34681da177e4SLinus Torvalds array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; 34691da177e4SLinus Torvalds array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; 34701da177e4SLinus Torvalds array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; 34711da177e4SLinus Torvalds array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; 34721da177e4SLinus Torvalds #endif 34731da177e4SLinus Torvalds array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; 347465f5c7c1SYOSHIFUJI Hideaki array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; 3475c4fd30ebSYOSHIFUJI Hideaki array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; 3476930d6ff2SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_ROUTER_PREF 3477930d6ff2SYOSHIFUJI Hideaki array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; 347852e16356SYOSHIFUJI Hideaki array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval; 3479fa03ef38SNeil Horman #ifdef CONFIG_IPV6_ROUTE_INFO 348009c884d4SYOSHIFUJI Hideaki array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; 348109c884d4SYOSHIFUJI Hideaki #endif 3482930d6ff2SYOSHIFUJI Hideaki #endif 3483fbea49e1SYOSHIFUJI Hideaki array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; 34840bcbc926SYOSHIFUJI Hideaki array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; 348595c385b4SNeil Horman #ifdef CONFIG_IPV6_OPTIMISTIC_DAD 348695c385b4SNeil Horman array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; 348795c385b4SNeil Horman #endif 34881da177e4SLinus Torvalds } 34891da177e4SLinus Torvalds 3490339bf98fSThomas Graf static inline size_t inet6_if_nlmsg_size(void) 3491339bf98fSThomas Graf { 3492339bf98fSThomas Graf return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 3493339bf98fSThomas Graf + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 3494339bf98fSThomas Graf + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 3495339bf98fSThomas Graf + nla_total_size(4) /* IFLA_MTU */ 3496339bf98fSThomas Graf + nla_total_size(4) /* IFLA_LINK */ 3497339bf98fSThomas Graf + nla_total_size( /* IFLA_PROTINFO */ 3498339bf98fSThomas Graf nla_total_size(4) /* IFLA_INET6_FLAGS */ 3499339bf98fSThomas Graf + nla_total_size(sizeof(struct ifla_cacheinfo)) 3500339bf98fSThomas Graf + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ 3501bf99f1bdSYOSHIFUJI Hideaki + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ 3502bf99f1bdSYOSHIFUJI Hideaki + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ 3503339bf98fSThomas Graf ); 3504339bf98fSThomas Graf } 3505c5396a31SYOSHIFUJI Hideaki 35067f7d9a6bSHerbert Xu static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items, 35077f7d9a6bSHerbert Xu int bytes) 35087f7d9a6bSHerbert Xu { 35097f7d9a6bSHerbert Xu int i; 35107f7d9a6bSHerbert Xu int pad = bytes - sizeof(u64) * items; 35117f7d9a6bSHerbert Xu BUG_ON(pad < 0); 35127f7d9a6bSHerbert Xu 35137f7d9a6bSHerbert Xu /* Use put_unaligned() because stats may not be aligned for u64. */ 35147f7d9a6bSHerbert Xu put_unaligned(items, &stats[0]); 35157f7d9a6bSHerbert Xu for (i = 1; i < items; i++) 35167f7d9a6bSHerbert Xu put_unaligned(snmp_fold_field(mib, i), &stats[i]); 35177f7d9a6bSHerbert Xu 35187f7d9a6bSHerbert Xu memset(&stats[items], 0, pad); 35197f7d9a6bSHerbert Xu } 35207f7d9a6bSHerbert Xu 35217f7d9a6bSHerbert Xu static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, 35227f7d9a6bSHerbert Xu int bytes) 35237f7d9a6bSHerbert Xu { 35247f7d9a6bSHerbert Xu switch(attrtype) { 35257f7d9a6bSHerbert Xu case IFLA_INET6_STATS: 35267f7d9a6bSHerbert Xu __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes); 35277f7d9a6bSHerbert Xu break; 35287f7d9a6bSHerbert Xu case IFLA_INET6_ICMP6STATS: 35297f7d9a6bSHerbert Xu __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes); 35307f7d9a6bSHerbert Xu break; 35317f7d9a6bSHerbert Xu } 35327f7d9a6bSHerbert Xu } 35337f7d9a6bSHerbert Xu 35341da177e4SLinus Torvalds static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, 3535b6544c0bSJamal Hadi Salim u32 pid, u32 seq, int event, unsigned int flags) 35361da177e4SLinus Torvalds { 35371da177e4SLinus Torvalds struct net_device *dev = idev->dev; 3538bf99f1bdSYOSHIFUJI Hideaki struct nlattr *nla; 353904561c1fSThomas Graf struct ifinfomsg *hdr; 35401da177e4SLinus Torvalds struct nlmsghdr *nlh; 354104561c1fSThomas Graf void *protoinfo; 35421da177e4SLinus Torvalds struct ifla_cacheinfo ci; 35431da177e4SLinus Torvalds 354404561c1fSThomas Graf nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); 354504561c1fSThomas Graf if (nlh == NULL) 354626932566SPatrick McHardy return -EMSGSIZE; 35471da177e4SLinus Torvalds 354804561c1fSThomas Graf hdr = nlmsg_data(nlh); 354904561c1fSThomas Graf hdr->ifi_family = AF_INET6; 355004561c1fSThomas Graf hdr->__ifi_pad = 0; 355104561c1fSThomas Graf hdr->ifi_type = dev->type; 355204561c1fSThomas Graf hdr->ifi_index = dev->ifindex; 355304561c1fSThomas Graf hdr->ifi_flags = dev_get_flags(dev); 355404561c1fSThomas Graf hdr->ifi_change = 0; 355504561c1fSThomas Graf 355604561c1fSThomas Graf NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); 35571da177e4SLinus Torvalds 35581da177e4SLinus Torvalds if (dev->addr_len) 355904561c1fSThomas Graf NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); 35601da177e4SLinus Torvalds 356104561c1fSThomas Graf NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); 35621da177e4SLinus Torvalds if (dev->ifindex != dev->iflink) 356304561c1fSThomas Graf NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); 35641da177e4SLinus Torvalds 356504561c1fSThomas Graf protoinfo = nla_nest_start(skb, IFLA_PROTINFO); 356604561c1fSThomas Graf if (protoinfo == NULL) 356704561c1fSThomas Graf goto nla_put_failure; 35681da177e4SLinus Torvalds 356904561c1fSThomas Graf NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags); 35701da177e4SLinus Torvalds 35711da177e4SLinus Torvalds ci.max_reasm_len = IPV6_MAXPLEN; 35721da177e4SLinus Torvalds ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 35731da177e4SLinus Torvalds + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); 35741da177e4SLinus Torvalds ci.reachable_time = idev->nd_parms->reachable_time; 35751da177e4SLinus Torvalds ci.retrans_time = idev->nd_parms->retrans_time; 357604561c1fSThomas Graf NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); 35771da177e4SLinus Torvalds 3578bf99f1bdSYOSHIFUJI Hideaki nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); 3579bf99f1bdSYOSHIFUJI Hideaki if (nla == NULL) 358004561c1fSThomas Graf goto nla_put_failure; 3581bf99f1bdSYOSHIFUJI Hideaki ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); 35821da177e4SLinus Torvalds 3583bf99f1bdSYOSHIFUJI Hideaki /* XXX - MC not implemented */ 3584bf99f1bdSYOSHIFUJI Hideaki 3585bf99f1bdSYOSHIFUJI Hideaki nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); 3586bf99f1bdSYOSHIFUJI Hideaki if (nla == NULL) 3587bf99f1bdSYOSHIFUJI Hideaki goto nla_put_failure; 3588bf99f1bdSYOSHIFUJI Hideaki snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); 3589bf99f1bdSYOSHIFUJI Hideaki 3590bf99f1bdSYOSHIFUJI Hideaki nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); 3591bf99f1bdSYOSHIFUJI Hideaki if (nla == NULL) 3592bf99f1bdSYOSHIFUJI Hideaki goto nla_put_failure; 3593bf99f1bdSYOSHIFUJI Hideaki snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); 35941da177e4SLinus Torvalds 359504561c1fSThomas Graf nla_nest_end(skb, protoinfo); 359604561c1fSThomas Graf return nlmsg_end(skb, nlh); 35971da177e4SLinus Torvalds 359804561c1fSThomas Graf nla_put_failure: 359926932566SPatrick McHardy nlmsg_cancel(skb, nlh); 360026932566SPatrick McHardy return -EMSGSIZE; 36011da177e4SLinus Torvalds } 36021da177e4SLinus Torvalds 36031da177e4SLinus Torvalds static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) 36041da177e4SLinus Torvalds { 3605b854272bSDenis V. Lunev struct net *net = skb->sk->sk_net; 36061da177e4SLinus Torvalds int idx, err; 36071da177e4SLinus Torvalds int s_idx = cb->args[0]; 36081da177e4SLinus Torvalds struct net_device *dev; 36091da177e4SLinus Torvalds struct inet6_dev *idev; 36101da177e4SLinus Torvalds 3611b854272bSDenis V. Lunev if (net != &init_net) 3612b854272bSDenis V. Lunev return 0; 3613b854272bSDenis V. Lunev 36141da177e4SLinus Torvalds read_lock(&dev_base_lock); 36157562f876SPavel Emelianov idx = 0; 3616881d966bSEric W. Biederman for_each_netdev(&init_net, dev) { 36171da177e4SLinus Torvalds if (idx < s_idx) 36187562f876SPavel Emelianov goto cont; 36191da177e4SLinus Torvalds if ((idev = in6_dev_get(dev)) == NULL) 36207562f876SPavel Emelianov goto cont; 36211da177e4SLinus Torvalds err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid, 3622b6544c0bSJamal Hadi Salim cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI); 36231da177e4SLinus Torvalds in6_dev_put(idev); 36241da177e4SLinus Torvalds if (err <= 0) 36251da177e4SLinus Torvalds break; 36267562f876SPavel Emelianov cont: 36277562f876SPavel Emelianov idx++; 36281da177e4SLinus Torvalds } 36291da177e4SLinus Torvalds read_unlock(&dev_base_lock); 36301da177e4SLinus Torvalds cb->args[0] = idx; 36311da177e4SLinus Torvalds 36321da177e4SLinus Torvalds return skb->len; 36331da177e4SLinus Torvalds } 36341da177e4SLinus Torvalds 36351da177e4SLinus Torvalds void inet6_ifinfo_notify(int event, struct inet6_dev *idev) 36361da177e4SLinus Torvalds { 36371da177e4SLinus Torvalds struct sk_buff *skb; 36388d7a76c9SThomas Graf int err = -ENOBUFS; 36391da177e4SLinus Torvalds 3640339bf98fSThomas Graf skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); 36418d7a76c9SThomas Graf if (skb == NULL) 36428d7a76c9SThomas Graf goto errout; 36438d7a76c9SThomas Graf 36448d7a76c9SThomas Graf err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); 364526932566SPatrick McHardy if (err < 0) { 364626932566SPatrick McHardy /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ 364726932566SPatrick McHardy WARN_ON(err == -EMSGSIZE); 364826932566SPatrick McHardy kfree_skb(skb); 364926932566SPatrick McHardy goto errout; 365026932566SPatrick McHardy } 365197c53cacSDenis V. Lunev err = rtnl_notify(skb, &init_net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); 36528d7a76c9SThomas Graf errout: 36538d7a76c9SThomas Graf if (err < 0) 365497c53cacSDenis V. Lunev rtnl_set_sk_err(&init_net, RTNLGRP_IPV6_IFADDR, err); 36551da177e4SLinus Torvalds } 36561da177e4SLinus Torvalds 3657339bf98fSThomas Graf static inline size_t inet6_prefix_nlmsg_size(void) 3658339bf98fSThomas Graf { 3659339bf98fSThomas Graf return NLMSG_ALIGN(sizeof(struct prefixmsg)) 3660339bf98fSThomas Graf + nla_total_size(sizeof(struct in6_addr)) 3661339bf98fSThomas Graf + nla_total_size(sizeof(struct prefix_cacheinfo)); 3662339bf98fSThomas Graf } 3663c5396a31SYOSHIFUJI Hideaki 36641da177e4SLinus Torvalds static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, 3665b6544c0bSJamal Hadi Salim struct prefix_info *pinfo, u32 pid, u32 seq, 3666b6544c0bSJamal Hadi Salim int event, unsigned int flags) 36671da177e4SLinus Torvalds { 36681da177e4SLinus Torvalds struct prefixmsg *pmsg; 36691da177e4SLinus Torvalds struct nlmsghdr *nlh; 36701da177e4SLinus Torvalds struct prefix_cacheinfo ci; 36711da177e4SLinus Torvalds 36726051e2f4SThomas Graf nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags); 36736051e2f4SThomas Graf if (nlh == NULL) 367426932566SPatrick McHardy return -EMSGSIZE; 36756051e2f4SThomas Graf 36766051e2f4SThomas Graf pmsg = nlmsg_data(nlh); 36771da177e4SLinus Torvalds pmsg->prefix_family = AF_INET6; 36788a47077aSPatrick McHardy pmsg->prefix_pad1 = 0; 36798a47077aSPatrick McHardy pmsg->prefix_pad2 = 0; 36801da177e4SLinus Torvalds pmsg->prefix_ifindex = idev->dev->ifindex; 36811da177e4SLinus Torvalds pmsg->prefix_len = pinfo->prefix_len; 36821da177e4SLinus Torvalds pmsg->prefix_type = pinfo->type; 36838a47077aSPatrick McHardy pmsg->prefix_pad3 = 0; 36841da177e4SLinus Torvalds pmsg->prefix_flags = 0; 36851da177e4SLinus Torvalds if (pinfo->onlink) 36861da177e4SLinus Torvalds pmsg->prefix_flags |= IF_PREFIX_ONLINK; 36871da177e4SLinus Torvalds if (pinfo->autoconf) 36881da177e4SLinus Torvalds pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; 36891da177e4SLinus Torvalds 36906051e2f4SThomas Graf NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); 36911da177e4SLinus Torvalds 36921da177e4SLinus Torvalds ci.preferred_time = ntohl(pinfo->prefered); 36931da177e4SLinus Torvalds ci.valid_time = ntohl(pinfo->valid); 36946051e2f4SThomas Graf NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); 36951da177e4SLinus Torvalds 36966051e2f4SThomas Graf return nlmsg_end(skb, nlh); 36971da177e4SLinus Torvalds 36986051e2f4SThomas Graf nla_put_failure: 369926932566SPatrick McHardy nlmsg_cancel(skb, nlh); 370026932566SPatrick McHardy return -EMSGSIZE; 37011da177e4SLinus Torvalds } 37021da177e4SLinus Torvalds 37031da177e4SLinus Torvalds static void inet6_prefix_notify(int event, struct inet6_dev *idev, 37041da177e4SLinus Torvalds struct prefix_info *pinfo) 37051da177e4SLinus Torvalds { 37061da177e4SLinus Torvalds struct sk_buff *skb; 37078c384bfaSThomas Graf int err = -ENOBUFS; 37081da177e4SLinus Torvalds 3709339bf98fSThomas Graf skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); 37108c384bfaSThomas Graf if (skb == NULL) 37118c384bfaSThomas Graf goto errout; 37128c384bfaSThomas Graf 37138c384bfaSThomas Graf err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); 371426932566SPatrick McHardy if (err < 0) { 371526932566SPatrick McHardy /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ 371626932566SPatrick McHardy WARN_ON(err == -EMSGSIZE); 371726932566SPatrick McHardy kfree_skb(skb); 371826932566SPatrick McHardy goto errout; 371926932566SPatrick McHardy } 372097c53cacSDenis V. Lunev err = rtnl_notify(skb, &init_net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); 37218c384bfaSThomas Graf errout: 37228c384bfaSThomas Graf if (err < 0) 372397c53cacSDenis V. Lunev rtnl_set_sk_err(&init_net, RTNLGRP_IPV6_PREFIX, err); 37241da177e4SLinus Torvalds } 37251da177e4SLinus Torvalds 37261da177e4SLinus Torvalds static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) 37271da177e4SLinus Torvalds { 37281da177e4SLinus Torvalds inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); 37291da177e4SLinus Torvalds 37301da177e4SLinus Torvalds switch (event) { 37311da177e4SLinus Torvalds case RTM_NEWADDR: 373295c385b4SNeil Horman /* 373395c385b4SNeil Horman * If the address was optimistic 373495c385b4SNeil Horman * we inserted the route at the start of 373595c385b4SNeil Horman * our DAD process, so we don't need 373695c385b4SNeil Horman * to do it again 373795c385b4SNeil Horman */ 373895c385b4SNeil Horman if (!(ifp->rt->rt6i_node)) 373940e22e8fSThomas Graf ip6_ins_rt(ifp->rt); 37401da177e4SLinus Torvalds if (ifp->idev->cnf.forwarding) 37411da177e4SLinus Torvalds addrconf_join_anycast(ifp); 37421da177e4SLinus Torvalds break; 37431da177e4SLinus Torvalds case RTM_DELADDR: 37441da177e4SLinus Torvalds if (ifp->idev->cnf.forwarding) 37451da177e4SLinus Torvalds addrconf_leave_anycast(ifp); 37461da177e4SLinus Torvalds addrconf_leave_solict(ifp->idev, &ifp->addr); 37471da177e4SLinus Torvalds dst_hold(&ifp->rt->u.dst); 3748e0a1ad73SThomas Graf if (ip6_del_rt(ifp->rt)) 37491da177e4SLinus Torvalds dst_free(&ifp->rt->u.dst); 37501da177e4SLinus Torvalds break; 37511da177e4SLinus Torvalds } 37521da177e4SLinus Torvalds } 37531da177e4SLinus Torvalds 37541da177e4SLinus Torvalds static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) 37551da177e4SLinus Torvalds { 37568814c4b5SYOSHIFUJI Hideaki rcu_read_lock_bh(); 37571da177e4SLinus Torvalds if (likely(ifp->idev->dead == 0)) 37581da177e4SLinus Torvalds __ipv6_ifa_notify(event, ifp); 37598814c4b5SYOSHIFUJI Hideaki rcu_read_unlock_bh(); 37601da177e4SLinus Torvalds } 37611da177e4SLinus Torvalds 37621da177e4SLinus Torvalds #ifdef CONFIG_SYSCTL 37631da177e4SLinus Torvalds 37641da177e4SLinus Torvalds static 37651da177e4SLinus Torvalds int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp, 37661da177e4SLinus Torvalds void __user *buffer, size_t *lenp, loff_t *ppos) 37671da177e4SLinus Torvalds { 37681da177e4SLinus Torvalds int *valp = ctl->data; 37691da177e4SLinus Torvalds int val = *valp; 37701da177e4SLinus Torvalds int ret; 37711da177e4SLinus Torvalds 37721da177e4SLinus Torvalds ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); 37731da177e4SLinus Torvalds 37741da177e4SLinus Torvalds if (write && valp != &ipv6_devconf_dflt.forwarding) { 37751da177e4SLinus Torvalds if (valp != &ipv6_devconf.forwarding) { 37761da177e4SLinus Torvalds if ((!*valp) ^ (!val)) { 37771da177e4SLinus Torvalds struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1; 37781da177e4SLinus Torvalds if (idev == NULL) 37791da177e4SLinus Torvalds return ret; 37801da177e4SLinus Torvalds dev_forward_change(idev); 37811da177e4SLinus Torvalds } 37821da177e4SLinus Torvalds } else { 37831da177e4SLinus Torvalds ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding; 37841da177e4SLinus Torvalds addrconf_forward_change(); 37851da177e4SLinus Torvalds } 37861da177e4SLinus Torvalds if (*valp) 37871da177e4SLinus Torvalds rt6_purge_dflt_routers(); 37881da177e4SLinus Torvalds } 37891da177e4SLinus Torvalds 37901da177e4SLinus Torvalds return ret; 37911da177e4SLinus Torvalds } 37921da177e4SLinus Torvalds 37931da177e4SLinus Torvalds static int addrconf_sysctl_forward_strategy(ctl_table *table, 37941da177e4SLinus Torvalds int __user *name, int nlen, 37951da177e4SLinus Torvalds void __user *oldval, 37961da177e4SLinus Torvalds size_t __user *oldlenp, 37971f29bcd7SAlexey Dobriyan void __user *newval, size_t newlen) 37981da177e4SLinus Torvalds { 37991da177e4SLinus Torvalds int *valp = table->data; 38001da177e4SLinus Torvalds int new; 38011da177e4SLinus Torvalds 38021da177e4SLinus Torvalds if (!newval || !newlen) 38031da177e4SLinus Torvalds return 0; 38041da177e4SLinus Torvalds if (newlen != sizeof(int)) 38051da177e4SLinus Torvalds return -EINVAL; 38061da177e4SLinus Torvalds if (get_user(new, (int __user *)newval)) 38071da177e4SLinus Torvalds return -EFAULT; 38081da177e4SLinus Torvalds if (new == *valp) 38091da177e4SLinus Torvalds return 0; 38101da177e4SLinus Torvalds if (oldval && oldlenp) { 38111da177e4SLinus Torvalds size_t len; 38121da177e4SLinus Torvalds if (get_user(len, oldlenp)) 38131da177e4SLinus Torvalds return -EFAULT; 38141da177e4SLinus Torvalds if (len) { 38151da177e4SLinus Torvalds if (len > table->maxlen) 38161da177e4SLinus Torvalds len = table->maxlen; 38171da177e4SLinus Torvalds if (copy_to_user(oldval, valp, len)) 38181da177e4SLinus Torvalds return -EFAULT; 38191da177e4SLinus Torvalds if (put_user(len, oldlenp)) 38201da177e4SLinus Torvalds return -EFAULT; 38211da177e4SLinus Torvalds } 38221da177e4SLinus Torvalds } 38231da177e4SLinus Torvalds 38241da177e4SLinus Torvalds if (valp != &ipv6_devconf_dflt.forwarding) { 38251da177e4SLinus Torvalds if (valp != &ipv6_devconf.forwarding) { 38261da177e4SLinus Torvalds struct inet6_dev *idev = (struct inet6_dev *)table->extra1; 38271da177e4SLinus Torvalds int changed; 38281da177e4SLinus Torvalds if (unlikely(idev == NULL)) 38291da177e4SLinus Torvalds return -ENODEV; 38301da177e4SLinus Torvalds changed = (!*valp) ^ (!new); 38311da177e4SLinus Torvalds *valp = new; 38321da177e4SLinus Torvalds if (changed) 38331da177e4SLinus Torvalds dev_forward_change(idev); 38341da177e4SLinus Torvalds } else { 38351da177e4SLinus Torvalds *valp = new; 38361da177e4SLinus Torvalds addrconf_forward_change(); 38371da177e4SLinus Torvalds } 38381da177e4SLinus Torvalds 38391da177e4SLinus Torvalds if (*valp) 38401da177e4SLinus Torvalds rt6_purge_dflt_routers(); 38411da177e4SLinus Torvalds } else 38421da177e4SLinus Torvalds *valp = new; 38431da177e4SLinus Torvalds 38441da177e4SLinus Torvalds return 1; 38451da177e4SLinus Torvalds } 38461da177e4SLinus Torvalds 38471da177e4SLinus Torvalds static struct addrconf_sysctl_table 38481da177e4SLinus Torvalds { 38491da177e4SLinus Torvalds struct ctl_table_header *sysctl_header; 38501da177e4SLinus Torvalds ctl_table addrconf_vars[__NET_IPV6_MAX]; 38511da177e4SLinus Torvalds ctl_table addrconf_dev[2]; 38521da177e4SLinus Torvalds ctl_table addrconf_conf_dir[2]; 38531da177e4SLinus Torvalds ctl_table addrconf_proto_dir[2]; 38541da177e4SLinus Torvalds ctl_table addrconf_root_dir[2]; 3855ab32ea5dSBrian Haley } addrconf_sysctl __read_mostly = { 38561da177e4SLinus Torvalds .sysctl_header = NULL, 38571da177e4SLinus Torvalds .addrconf_vars = { 38581da177e4SLinus Torvalds { 38591da177e4SLinus Torvalds .ctl_name = NET_IPV6_FORWARDING, 38601da177e4SLinus Torvalds .procname = "forwarding", 38611da177e4SLinus Torvalds .data = &ipv6_devconf.forwarding, 38621da177e4SLinus Torvalds .maxlen = sizeof(int), 38631da177e4SLinus Torvalds .mode = 0644, 38641da177e4SLinus Torvalds .proc_handler = &addrconf_sysctl_forward, 38651da177e4SLinus Torvalds .strategy = &addrconf_sysctl_forward_strategy, 38661da177e4SLinus Torvalds }, 38671da177e4SLinus Torvalds { 38681da177e4SLinus Torvalds .ctl_name = NET_IPV6_HOP_LIMIT, 38691da177e4SLinus Torvalds .procname = "hop_limit", 38701da177e4SLinus Torvalds .data = &ipv6_devconf.hop_limit, 38711da177e4SLinus Torvalds .maxlen = sizeof(int), 38721da177e4SLinus Torvalds .mode = 0644, 38731da177e4SLinus Torvalds .proc_handler = proc_dointvec, 38741da177e4SLinus Torvalds }, 38751da177e4SLinus Torvalds { 38761da177e4SLinus Torvalds .ctl_name = NET_IPV6_MTU, 38771da177e4SLinus Torvalds .procname = "mtu", 38781da177e4SLinus Torvalds .data = &ipv6_devconf.mtu6, 38791da177e4SLinus Torvalds .maxlen = sizeof(int), 38801da177e4SLinus Torvalds .mode = 0644, 38811da177e4SLinus Torvalds .proc_handler = &proc_dointvec, 38821da177e4SLinus Torvalds }, 38831da177e4SLinus Torvalds { 38841da177e4SLinus Torvalds .ctl_name = NET_IPV6_ACCEPT_RA, 38851da177e4SLinus Torvalds .procname = "accept_ra", 38861da177e4SLinus Torvalds .data = &ipv6_devconf.accept_ra, 38871da177e4SLinus Torvalds .maxlen = sizeof(int), 38881da177e4SLinus Torvalds .mode = 0644, 38891da177e4SLinus Torvalds .proc_handler = &proc_dointvec, 38901da177e4SLinus Torvalds }, 38911da177e4SLinus Torvalds { 38921da177e4SLinus Torvalds .ctl_name = NET_IPV6_ACCEPT_REDIRECTS, 38931da177e4SLinus Torvalds .procname = "accept_redirects", 38941da177e4SLinus Torvalds .data = &ipv6_devconf.accept_redirects, 38951da177e4SLinus Torvalds .maxlen = sizeof(int), 38961da177e4SLinus Torvalds .mode = 0644, 38971da177e4SLinus Torvalds .proc_handler = &proc_dointvec, 38981da177e4SLinus Torvalds }, 38991da177e4SLinus Torvalds { 39001da177e4SLinus Torvalds .ctl_name = NET_IPV6_AUTOCONF, 39011da177e4SLinus Torvalds .procname = "autoconf", 39021da177e4SLinus Torvalds .data = &ipv6_devconf.autoconf, 39031da177e4SLinus Torvalds .maxlen = sizeof(int), 39041da177e4SLinus Torvalds .mode = 0644, 39051da177e4SLinus Torvalds .proc_handler = &proc_dointvec, 39061da177e4SLinus Torvalds }, 39071da177e4SLinus Torvalds { 39081da177e4SLinus Torvalds .ctl_name = NET_IPV6_DAD_TRANSMITS, 39091da177e4SLinus Torvalds .procname = "dad_transmits", 39101da177e4SLinus Torvalds .data = &ipv6_devconf.dad_transmits, 39111da177e4SLinus Torvalds .maxlen = sizeof(int), 39121da177e4SLinus Torvalds .mode = 0644, 39131da177e4SLinus Torvalds .proc_handler = &proc_dointvec, 39141da177e4SLinus Torvalds }, 39151da177e4SLinus Torvalds { 39161da177e4SLinus Torvalds .ctl_name = NET_IPV6_RTR_SOLICITS, 39171da177e4SLinus Torvalds .procname = "router_solicitations", 39181da177e4SLinus Torvalds .data = &ipv6_devconf.rtr_solicits, 39191da177e4SLinus Torvalds .maxlen = sizeof(int), 39201da177e4SLinus Torvalds .mode = 0644, 39211da177e4SLinus Torvalds .proc_handler = &proc_dointvec, 39221da177e4SLinus Torvalds }, 39231da177e4SLinus Torvalds { 39241da177e4SLinus Torvalds .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL, 39251da177e4SLinus Torvalds .procname = "router_solicitation_interval", 39261da177e4SLinus Torvalds .data = &ipv6_devconf.rtr_solicit_interval, 39271da177e4SLinus Torvalds .maxlen = sizeof(int), 39281da177e4SLinus Torvalds .mode = 0644, 39291da177e4SLinus Torvalds .proc_handler = &proc_dointvec_jiffies, 39301da177e4SLinus Torvalds .strategy = &sysctl_jiffies, 39311da177e4SLinus Torvalds }, 39321da177e4SLinus Torvalds { 39331da177e4SLinus Torvalds .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY, 39341da177e4SLinus Torvalds .procname = "router_solicitation_delay", 39351da177e4SLinus Torvalds .data = &ipv6_devconf.rtr_solicit_delay, 39361da177e4SLinus Torvalds .maxlen = sizeof(int), 39371da177e4SLinus Torvalds .mode = 0644, 39381da177e4SLinus Torvalds .proc_handler = &proc_dointvec_jiffies, 39391da177e4SLinus Torvalds .strategy = &sysctl_jiffies, 39401da177e4SLinus Torvalds }, 39411da177e4SLinus Torvalds { 39421da177e4SLinus Torvalds .ctl_name = NET_IPV6_FORCE_MLD_VERSION, 39431da177e4SLinus Torvalds .procname = "force_mld_version", 39441da177e4SLinus Torvalds .data = &ipv6_devconf.force_mld_version, 39451da177e4SLinus Torvalds .maxlen = sizeof(int), 39461da177e4SLinus Torvalds .mode = 0644, 39471da177e4SLinus Torvalds .proc_handler = &proc_dointvec, 39481da177e4SLinus Torvalds }, 39491da177e4SLinus Torvalds #ifdef CONFIG_IPV6_PRIVACY 39501da177e4SLinus Torvalds { 39511da177e4SLinus Torvalds .ctl_name = NET_IPV6_USE_TEMPADDR, 39521da177e4SLinus Torvalds .procname = "use_tempaddr", 39531da177e4SLinus Torvalds .data = &ipv6_devconf.use_tempaddr, 39541da177e4SLinus Torvalds .maxlen = sizeof(int), 39551da177e4SLinus Torvalds .mode = 0644, 39561da177e4SLinus Torvalds .proc_handler = &proc_dointvec, 39571da177e4SLinus Torvalds }, 39581da177e4SLinus Torvalds { 39591da177e4SLinus Torvalds .ctl_name = NET_IPV6_TEMP_VALID_LFT, 39601da177e4SLinus Torvalds .procname = "temp_valid_lft", 39611da177e4SLinus Torvalds .data = &ipv6_devconf.temp_valid_lft, 39621da177e4SLinus Torvalds .maxlen = sizeof(int), 39631da177e4SLinus Torvalds .mode = 0644, 39641da177e4SLinus Torvalds .proc_handler = &proc_dointvec, 39651da177e4SLinus Torvalds }, 39661da177e4SLinus Torvalds { 39671da177e4SLinus Torvalds .ctl_name = NET_IPV6_TEMP_PREFERED_LFT, 39681da177e4SLinus Torvalds .procname = "temp_prefered_lft", 39691da177e4SLinus Torvalds .data = &ipv6_devconf.temp_prefered_lft, 39701da177e4SLinus Torvalds .maxlen = sizeof(int), 39711da177e4SLinus Torvalds .mode = 0644, 39721da177e4SLinus Torvalds .proc_handler = &proc_dointvec, 39731da177e4SLinus Torvalds }, 39741da177e4SLinus Torvalds { 39751da177e4SLinus Torvalds .ctl_name = NET_IPV6_REGEN_MAX_RETRY, 39761da177e4SLinus Torvalds .procname = "regen_max_retry", 39771da177e4SLinus Torvalds .data = &ipv6_devconf.regen_max_retry, 39781da177e4SLinus Torvalds .maxlen = sizeof(int), 39791da177e4SLinus Torvalds .mode = 0644, 39801da177e4SLinus Torvalds .proc_handler = &proc_dointvec, 39811da177e4SLinus Torvalds }, 39821da177e4SLinus Torvalds { 39831da177e4SLinus Torvalds .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR, 39841da177e4SLinus Torvalds .procname = "max_desync_factor", 39851da177e4SLinus Torvalds .data = &ipv6_devconf.max_desync_factor, 39861da177e4SLinus Torvalds .maxlen = sizeof(int), 39871da177e4SLinus Torvalds .mode = 0644, 39881da177e4SLinus Torvalds .proc_handler = &proc_dointvec, 39891da177e4SLinus Torvalds }, 39901da177e4SLinus Torvalds #endif 39911da177e4SLinus Torvalds { 39921da177e4SLinus Torvalds .ctl_name = NET_IPV6_MAX_ADDRESSES, 39931da177e4SLinus Torvalds .procname = "max_addresses", 39941da177e4SLinus Torvalds .data = &ipv6_devconf.max_addresses, 39951da177e4SLinus Torvalds .maxlen = sizeof(int), 39961da177e4SLinus Torvalds .mode = 0644, 39971da177e4SLinus Torvalds .proc_handler = &proc_dointvec, 39981da177e4SLinus Torvalds }, 39991da177e4SLinus Torvalds { 400065f5c7c1SYOSHIFUJI Hideaki .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR, 400165f5c7c1SYOSHIFUJI Hideaki .procname = "accept_ra_defrtr", 400265f5c7c1SYOSHIFUJI Hideaki .data = &ipv6_devconf.accept_ra_defrtr, 400365f5c7c1SYOSHIFUJI Hideaki .maxlen = sizeof(int), 400465f5c7c1SYOSHIFUJI Hideaki .mode = 0644, 400565f5c7c1SYOSHIFUJI Hideaki .proc_handler = &proc_dointvec, 400665f5c7c1SYOSHIFUJI Hideaki }, 400765f5c7c1SYOSHIFUJI Hideaki { 4008c4fd30ebSYOSHIFUJI Hideaki .ctl_name = NET_IPV6_ACCEPT_RA_PINFO, 4009c4fd30ebSYOSHIFUJI Hideaki .procname = "accept_ra_pinfo", 4010c4fd30ebSYOSHIFUJI Hideaki .data = &ipv6_devconf.accept_ra_pinfo, 4011c4fd30ebSYOSHIFUJI Hideaki .maxlen = sizeof(int), 4012c4fd30ebSYOSHIFUJI Hideaki .mode = 0644, 4013c4fd30ebSYOSHIFUJI Hideaki .proc_handler = &proc_dointvec, 4014c4fd30ebSYOSHIFUJI Hideaki }, 4015930d6ff2SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_ROUTER_PREF 4016930d6ff2SYOSHIFUJI Hideaki { 4017930d6ff2SYOSHIFUJI Hideaki .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF, 4018930d6ff2SYOSHIFUJI Hideaki .procname = "accept_ra_rtr_pref", 4019930d6ff2SYOSHIFUJI Hideaki .data = &ipv6_devconf.accept_ra_rtr_pref, 4020930d6ff2SYOSHIFUJI Hideaki .maxlen = sizeof(int), 4021930d6ff2SYOSHIFUJI Hideaki .mode = 0644, 4022930d6ff2SYOSHIFUJI Hideaki .proc_handler = &proc_dointvec, 4023930d6ff2SYOSHIFUJI Hideaki }, 402452e16356SYOSHIFUJI Hideaki { 402552e16356SYOSHIFUJI Hideaki .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL, 402652e16356SYOSHIFUJI Hideaki .procname = "router_probe_interval", 402752e16356SYOSHIFUJI Hideaki .data = &ipv6_devconf.rtr_probe_interval, 402852e16356SYOSHIFUJI Hideaki .maxlen = sizeof(int), 402952e16356SYOSHIFUJI Hideaki .mode = 0644, 403052e16356SYOSHIFUJI Hideaki .proc_handler = &proc_dointvec_jiffies, 403152e16356SYOSHIFUJI Hideaki .strategy = &sysctl_jiffies, 403252e16356SYOSHIFUJI Hideaki }, 4033fa03ef38SNeil Horman #ifdef CONFIG_IPV6_ROUTE_INFO 403409c884d4SYOSHIFUJI Hideaki { 403509c884d4SYOSHIFUJI Hideaki .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN, 403609c884d4SYOSHIFUJI Hideaki .procname = "accept_ra_rt_info_max_plen", 403709c884d4SYOSHIFUJI Hideaki .data = &ipv6_devconf.accept_ra_rt_info_max_plen, 403809c884d4SYOSHIFUJI Hideaki .maxlen = sizeof(int), 403909c884d4SYOSHIFUJI Hideaki .mode = 0644, 404009c884d4SYOSHIFUJI Hideaki .proc_handler = &proc_dointvec, 404109c884d4SYOSHIFUJI Hideaki }, 404209c884d4SYOSHIFUJI Hideaki #endif 4043930d6ff2SYOSHIFUJI Hideaki #endif 4044c4fd30ebSYOSHIFUJI Hideaki { 4045fbea49e1SYOSHIFUJI Hideaki .ctl_name = NET_IPV6_PROXY_NDP, 4046fbea49e1SYOSHIFUJI Hideaki .procname = "proxy_ndp", 4047fbea49e1SYOSHIFUJI Hideaki .data = &ipv6_devconf.proxy_ndp, 4048fbea49e1SYOSHIFUJI Hideaki .maxlen = sizeof(int), 4049fbea49e1SYOSHIFUJI Hideaki .mode = 0644, 4050fbea49e1SYOSHIFUJI Hideaki .proc_handler = &proc_dointvec, 4051fbea49e1SYOSHIFUJI Hideaki }, 4052fbea49e1SYOSHIFUJI Hideaki { 40530bcbc926SYOSHIFUJI Hideaki .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE, 40540bcbc926SYOSHIFUJI Hideaki .procname = "accept_source_route", 40550bcbc926SYOSHIFUJI Hideaki .data = &ipv6_devconf.accept_source_route, 40560bcbc926SYOSHIFUJI Hideaki .maxlen = sizeof(int), 40570bcbc926SYOSHIFUJI Hideaki .mode = 0644, 40580bcbc926SYOSHIFUJI Hideaki .proc_handler = &proc_dointvec, 40590bcbc926SYOSHIFUJI Hideaki }, 406095c385b4SNeil Horman #ifdef CONFIG_IPV6_OPTIMISTIC_DAD 406195c385b4SNeil Horman { 406295c385b4SNeil Horman .ctl_name = CTL_UNNUMBERED, 406395c385b4SNeil Horman .procname = "optimistic_dad", 406495c385b4SNeil Horman .data = &ipv6_devconf.optimistic_dad, 406595c385b4SNeil Horman .maxlen = sizeof(int), 406695c385b4SNeil Horman .mode = 0644, 406795c385b4SNeil Horman .proc_handler = &proc_dointvec, 406895c385b4SNeil Horman 406995c385b4SNeil Horman }, 407095c385b4SNeil Horman #endif 40710bcbc926SYOSHIFUJI Hideaki { 40721da177e4SLinus Torvalds .ctl_name = 0, /* sentinel */ 40731da177e4SLinus Torvalds } 40741da177e4SLinus Torvalds }, 40751da177e4SLinus Torvalds .addrconf_dev = { 40761da177e4SLinus Torvalds { 40771da177e4SLinus Torvalds .ctl_name = NET_PROTO_CONF_ALL, 40781da177e4SLinus Torvalds .procname = "all", 40791da177e4SLinus Torvalds .mode = 0555, 40801da177e4SLinus Torvalds .child = addrconf_sysctl.addrconf_vars, 40811da177e4SLinus Torvalds }, 40821da177e4SLinus Torvalds { 40831da177e4SLinus Torvalds .ctl_name = 0, /* sentinel */ 40841da177e4SLinus Torvalds } 40851da177e4SLinus Torvalds }, 40861da177e4SLinus Torvalds .addrconf_conf_dir = { 40871da177e4SLinus Torvalds { 40881da177e4SLinus Torvalds .ctl_name = NET_IPV6_CONF, 40891da177e4SLinus Torvalds .procname = "conf", 40901da177e4SLinus Torvalds .mode = 0555, 40911da177e4SLinus Torvalds .child = addrconf_sysctl.addrconf_dev, 40921da177e4SLinus Torvalds }, 40931da177e4SLinus Torvalds { 40941da177e4SLinus Torvalds .ctl_name = 0, /* sentinel */ 40951da177e4SLinus Torvalds } 40961da177e4SLinus Torvalds }, 40971da177e4SLinus Torvalds .addrconf_proto_dir = { 40981da177e4SLinus Torvalds { 40991da177e4SLinus Torvalds .ctl_name = NET_IPV6, 41001da177e4SLinus Torvalds .procname = "ipv6", 41011da177e4SLinus Torvalds .mode = 0555, 41021da177e4SLinus Torvalds .child = addrconf_sysctl.addrconf_conf_dir, 41031da177e4SLinus Torvalds }, 41041da177e4SLinus Torvalds { 41051da177e4SLinus Torvalds .ctl_name = 0, /* sentinel */ 41061da177e4SLinus Torvalds } 41071da177e4SLinus Torvalds }, 41081da177e4SLinus Torvalds .addrconf_root_dir = { 41091da177e4SLinus Torvalds { 41101da177e4SLinus Torvalds .ctl_name = CTL_NET, 41111da177e4SLinus Torvalds .procname = "net", 41121da177e4SLinus Torvalds .mode = 0555, 41131da177e4SLinus Torvalds .child = addrconf_sysctl.addrconf_proto_dir, 41141da177e4SLinus Torvalds }, 41151da177e4SLinus Torvalds { 41161da177e4SLinus Torvalds .ctl_name = 0, /* sentinel */ 41171da177e4SLinus Torvalds } 41181da177e4SLinus Torvalds }, 41191da177e4SLinus Torvalds }; 41201da177e4SLinus Torvalds 41211da177e4SLinus Torvalds static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p) 41221da177e4SLinus Torvalds { 41231da177e4SLinus Torvalds int i; 41241da177e4SLinus Torvalds struct net_device *dev = idev ? idev->dev : NULL; 41251da177e4SLinus Torvalds struct addrconf_sysctl_table *t; 41261da177e4SLinus Torvalds char *dev_name = NULL; 41271da177e4SLinus Torvalds 4128af879cc7SArnaldo Carvalho de Melo t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); 41291da177e4SLinus Torvalds if (t == NULL) 41301da177e4SLinus Torvalds return; 41311da177e4SLinus Torvalds for (i=0; t->addrconf_vars[i].data; i++) { 41321da177e4SLinus Torvalds t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf; 41331da177e4SLinus Torvalds t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ 41341da177e4SLinus Torvalds } 41351da177e4SLinus Torvalds if (dev) { 41361da177e4SLinus Torvalds dev_name = dev->name; 41371da177e4SLinus Torvalds t->addrconf_dev[0].ctl_name = dev->ifindex; 41381da177e4SLinus Torvalds } else { 41391da177e4SLinus Torvalds dev_name = "default"; 41401da177e4SLinus Torvalds t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT; 41411da177e4SLinus Torvalds } 41421da177e4SLinus Torvalds 41431da177e4SLinus Torvalds /* 41441da177e4SLinus Torvalds * Make a copy of dev_name, because '.procname' is regarded as const 41451da177e4SLinus Torvalds * by sysctl and we wouldn't want anyone to change it under our feet 41461da177e4SLinus Torvalds * (see SIOCSIFNAME). 41471da177e4SLinus Torvalds */ 4148543537bdSPaulo Marques dev_name = kstrdup(dev_name, GFP_KERNEL); 41491da177e4SLinus Torvalds if (!dev_name) 41501da177e4SLinus Torvalds goto free; 41511da177e4SLinus Torvalds 41521da177e4SLinus Torvalds t->addrconf_dev[0].procname = dev_name; 41531da177e4SLinus Torvalds 41541da177e4SLinus Torvalds t->addrconf_dev[0].child = t->addrconf_vars; 41551da177e4SLinus Torvalds t->addrconf_conf_dir[0].child = t->addrconf_dev; 41561da177e4SLinus Torvalds t->addrconf_proto_dir[0].child = t->addrconf_conf_dir; 41571da177e4SLinus Torvalds t->addrconf_root_dir[0].child = t->addrconf_proto_dir; 41581da177e4SLinus Torvalds 41590b4d4147SEric W. Biederman t->sysctl_header = register_sysctl_table(t->addrconf_root_dir); 41601da177e4SLinus Torvalds if (t->sysctl_header == NULL) 41611da177e4SLinus Torvalds goto free_procname; 41621da177e4SLinus Torvalds else 41631da177e4SLinus Torvalds p->sysctl = t; 41641da177e4SLinus Torvalds return; 41651da177e4SLinus Torvalds 41661da177e4SLinus Torvalds /* error path */ 41671da177e4SLinus Torvalds free_procname: 41681da177e4SLinus Torvalds kfree(dev_name); 41691da177e4SLinus Torvalds free: 41701da177e4SLinus Torvalds kfree(t); 41711da177e4SLinus Torvalds 41721da177e4SLinus Torvalds return; 41731da177e4SLinus Torvalds } 41741da177e4SLinus Torvalds 41751da177e4SLinus Torvalds static void addrconf_sysctl_unregister(struct ipv6_devconf *p) 41761da177e4SLinus Torvalds { 41771da177e4SLinus Torvalds if (p->sysctl) { 41781da177e4SLinus Torvalds struct addrconf_sysctl_table *t = p->sysctl; 41791da177e4SLinus Torvalds p->sysctl = NULL; 41801da177e4SLinus Torvalds unregister_sysctl_table(t->sysctl_header); 41811da177e4SLinus Torvalds kfree(t->addrconf_dev[0].procname); 41821da177e4SLinus Torvalds kfree(t); 41831da177e4SLinus Torvalds } 41841da177e4SLinus Torvalds } 41851da177e4SLinus Torvalds 41861da177e4SLinus Torvalds 41871da177e4SLinus Torvalds #endif 41881da177e4SLinus Torvalds 41891da177e4SLinus Torvalds /* 41901da177e4SLinus Torvalds * Device notifier 41911da177e4SLinus Torvalds */ 41921da177e4SLinus Torvalds 41931da177e4SLinus Torvalds int register_inet6addr_notifier(struct notifier_block *nb) 41941da177e4SLinus Torvalds { 4195e041c683SAlan Stern return atomic_notifier_chain_register(&inet6addr_chain, nb); 41961da177e4SLinus Torvalds } 41971da177e4SLinus Torvalds 41987159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(register_inet6addr_notifier); 41997159039aSYOSHIFUJI Hideaki 42001da177e4SLinus Torvalds int unregister_inet6addr_notifier(struct notifier_block *nb) 42011da177e4SLinus Torvalds { 4202e041c683SAlan Stern return atomic_notifier_chain_unregister(&inet6addr_chain,nb); 42031da177e4SLinus Torvalds } 42041da177e4SLinus Torvalds 42057159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(unregister_inet6addr_notifier); 42067159039aSYOSHIFUJI Hideaki 42071da177e4SLinus Torvalds /* 42081da177e4SLinus Torvalds * Init / cleanup code 42091da177e4SLinus Torvalds */ 42101da177e4SLinus Torvalds 42111da177e4SLinus Torvalds int __init addrconf_init(void) 42121da177e4SLinus Torvalds { 42132a8cc6c8SYOSHIFUJI Hideaki int err; 42142a8cc6c8SYOSHIFUJI Hideaki 42152a8cc6c8SYOSHIFUJI Hideaki if ((err = ipv6_addr_label_init()) < 0) { 42162a8cc6c8SYOSHIFUJI Hideaki printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n", 42172a8cc6c8SYOSHIFUJI Hideaki err); 42182a8cc6c8SYOSHIFUJI Hideaki return err; 42192a8cc6c8SYOSHIFUJI Hideaki } 42201da177e4SLinus Torvalds 42211da177e4SLinus Torvalds /* The addrconf netdev notifier requires that loopback_dev 42221da177e4SLinus Torvalds * has it's ipv6 private information allocated and setup 42231da177e4SLinus Torvalds * before it can bring up and give link-local addresses 42241da177e4SLinus Torvalds * to other devices which are up. 42251da177e4SLinus Torvalds * 42261da177e4SLinus Torvalds * Unfortunately, loopback_dev is not necessarily the first 42271da177e4SLinus Torvalds * entry in the global dev_base list of net devices. In fact, 42281da177e4SLinus Torvalds * it is likely to be the very last entry on that list. 42291da177e4SLinus Torvalds * So this causes the notifier registry below to try and 42301da177e4SLinus Torvalds * give link-local addresses to all devices besides loopback_dev 42311da177e4SLinus Torvalds * first, then loopback_dev, which cases all the non-loopback_dev 42321da177e4SLinus Torvalds * devices to fail to get a link-local address. 42331da177e4SLinus Torvalds * 42341da177e4SLinus Torvalds * So, as a temporary fix, allocate the ipv6 structure for 42351da177e4SLinus Torvalds * loopback_dev first by hand. 42361da177e4SLinus Torvalds * Longer term, all of the dependencies ipv6 has upon the loopback 42371da177e4SLinus Torvalds * device and it being up should be removed. 42381da177e4SLinus Torvalds */ 42391da177e4SLinus Torvalds rtnl_lock(); 42402774c7abSEric W. Biederman if (!ipv6_add_dev(init_net.loopback_dev)) 42411da177e4SLinus Torvalds err = -ENOMEM; 42421da177e4SLinus Torvalds rtnl_unlock(); 42431da177e4SLinus Torvalds if (err) 42441da177e4SLinus Torvalds return err; 42451da177e4SLinus Torvalds 42462774c7abSEric W. Biederman ip6_null_entry.u.dst.dev = init_net.loopback_dev; 42472774c7abSEric W. Biederman ip6_null_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev); 42489a6bf6feSYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_MULTIPLE_TABLES 42492774c7abSEric W. Biederman ip6_prohibit_entry.u.dst.dev = init_net.loopback_dev; 42502774c7abSEric W. Biederman ip6_prohibit_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev); 42512774c7abSEric W. Biederman ip6_blk_hole_entry.u.dst.dev = init_net.loopback_dev; 42522774c7abSEric W. Biederman ip6_blk_hole_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev); 42539a6bf6feSYOSHIFUJI Hideaki #endif 4254c62dba90SHerbert Xu 42551da177e4SLinus Torvalds register_netdevice_notifier(&ipv6_dev_notf); 42561da177e4SLinus Torvalds 42571da177e4SLinus Torvalds addrconf_verify(0); 4258c127ea2cSThomas Graf 4259c127ea2cSThomas Graf err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo); 4260c127ea2cSThomas Graf if (err < 0) 4261c127ea2cSThomas Graf goto errout; 4262c127ea2cSThomas Graf 4263c127ea2cSThomas Graf /* Only the first call to __rtnl_register can fail */ 4264c127ea2cSThomas Graf __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL); 4265c127ea2cSThomas Graf __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL); 4266c127ea2cSThomas Graf __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr); 4267c127ea2cSThomas Graf __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr); 4268c127ea2cSThomas Graf __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr); 4269c127ea2cSThomas Graf 42702a8cc6c8SYOSHIFUJI Hideaki ipv6_addr_label_rtnl_register(); 42712a8cc6c8SYOSHIFUJI Hideaki 42721da177e4SLinus Torvalds #ifdef CONFIG_SYSCTL 42731da177e4SLinus Torvalds addrconf_sysctl.sysctl_header = 42740b4d4147SEric W. Biederman register_sysctl_table(addrconf_sysctl.addrconf_root_dir); 42751da177e4SLinus Torvalds addrconf_sysctl_register(NULL, &ipv6_devconf_dflt); 42761da177e4SLinus Torvalds #endif 42771da177e4SLinus Torvalds 42781da177e4SLinus Torvalds return 0; 4279c127ea2cSThomas Graf errout: 4280c127ea2cSThomas Graf unregister_netdevice_notifier(&ipv6_dev_notf); 4281c127ea2cSThomas Graf 4282c127ea2cSThomas Graf return err; 42831da177e4SLinus Torvalds } 42841da177e4SLinus Torvalds 42851da177e4SLinus Torvalds void __exit addrconf_cleanup(void) 42861da177e4SLinus Torvalds { 42871da177e4SLinus Torvalds struct net_device *dev; 42881da177e4SLinus Torvalds struct inet6_ifaddr *ifa; 42891da177e4SLinus Torvalds int i; 42901da177e4SLinus Torvalds 42911da177e4SLinus Torvalds unregister_netdevice_notifier(&ipv6_dev_notf); 42921da177e4SLinus Torvalds 42931da177e4SLinus Torvalds #ifdef CONFIG_SYSCTL 42941da177e4SLinus Torvalds addrconf_sysctl_unregister(&ipv6_devconf_dflt); 42951da177e4SLinus Torvalds addrconf_sysctl_unregister(&ipv6_devconf); 42961da177e4SLinus Torvalds #endif 42971da177e4SLinus Torvalds 42981da177e4SLinus Torvalds rtnl_lock(); 42991da177e4SLinus Torvalds 43001da177e4SLinus Torvalds /* 43011da177e4SLinus Torvalds * clean dev list. 43021da177e4SLinus Torvalds */ 43031da177e4SLinus Torvalds 4304881d966bSEric W. Biederman for_each_netdev(&init_net, dev) { 4305dffe4f04SMicah Gruber if (__in6_dev_get(dev) == NULL) 43061da177e4SLinus Torvalds continue; 43071da177e4SLinus Torvalds addrconf_ifdown(dev, 1); 43081da177e4SLinus Torvalds } 43092774c7abSEric W. Biederman addrconf_ifdown(init_net.loopback_dev, 2); 43101da177e4SLinus Torvalds 43111da177e4SLinus Torvalds /* 43121da177e4SLinus Torvalds * Check hash table. 43131da177e4SLinus Torvalds */ 43141da177e4SLinus Torvalds 43151da177e4SLinus Torvalds write_lock_bh(&addrconf_hash_lock); 43161da177e4SLinus Torvalds for (i=0; i < IN6_ADDR_HSIZE; i++) { 43171da177e4SLinus Torvalds for (ifa=inet6_addr_lst[i]; ifa; ) { 43181da177e4SLinus Torvalds struct inet6_ifaddr *bifa; 43191da177e4SLinus Torvalds 43201da177e4SLinus Torvalds bifa = ifa; 43211da177e4SLinus Torvalds ifa = ifa->lst_next; 43221da177e4SLinus Torvalds printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa); 43231da177e4SLinus Torvalds /* Do not free it; something is wrong. 43241da177e4SLinus Torvalds Now we can investigate it with debugger. 43251da177e4SLinus Torvalds */ 43261da177e4SLinus Torvalds } 43271da177e4SLinus Torvalds } 43281da177e4SLinus Torvalds write_unlock_bh(&addrconf_hash_lock); 43291da177e4SLinus Torvalds 43301da177e4SLinus Torvalds del_timer(&addr_chk_timer); 43311da177e4SLinus Torvalds 43321da177e4SLinus Torvalds rtnl_unlock(); 43331da177e4SLinus Torvalds } 4334