blob: d1ab6ab29a55c11e0570bb9854c524d9f21369fc [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * IPv6 Address [auto]configuration
3 * Linux INET6 implementation
4 *
5 * Authors:
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09006 * Pedro Roque <roque@di.fc.ul.pt>
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
13 */
14
15/*
16 * Changes:
17 *
18 * Janos Farkas : delete timer on ifdown
19 * <chexum@bankinf.banki.hu>
20 * Andi Kleen : kill double kfree on module
21 * unload.
22 * Maciej W. Rozycki : FDDI support
23 * sekiya@USAGI : Don't send too many RS
24 * packets.
25 * yoshfuji@USAGI : Fixed interval between DAD
26 * packets.
27 * YOSHIFUJI Hideaki @USAGI : improved accuracy of
28 * address validation timer.
29 * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
30 * support.
31 * Yuji SEKIYA @USAGI : Don't assign a same IPv6
32 * address on a same interface.
33 * YOSHIFUJI Hideaki @USAGI : ARCnet support
34 * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
35 * seq_file.
YOSHIFUJI Hideakib1cacb62005-11-08 09:38:12 -080036 * YOSHIFUJI Hideaki @USAGI : improved source address
37 * selection; consider scope,
38 * status etc.
Linus Torvalds1da177e2005-04-16 15:20:36 -070039 */
40
Joe Perchesf3213832012-05-15 14:11:53 +000041#define pr_fmt(fmt) "IPv6: " fmt
42
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#include <linux/errno.h>
44#include <linux/types.h>
Ilpo Järvinena0bffff2009-03-21 13:36:17 -070045#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#include <linux/socket.h>
47#include <linux/sockios.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070048#include <linux/net.h>
49#include <linux/in6.h>
50#include <linux/netdevice.h>
Thomas Graf18237302006-08-04 23:04:54 -070051#include <linux/if_addr.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070052#include <linux/if_arp.h>
53#include <linux/if_arcnet.h>
54#include <linux/if_infiniband.h>
55#include <linux/route.h>
56#include <linux/inetdevice.h>
57#include <linux/init.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090058#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070059#ifdef CONFIG_SYSCTL
60#include <linux/sysctl.h>
61#endif
Randy Dunlap4fc268d2006-01-11 12:17:47 -080062#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070063#include <linux/delay.h>
64#include <linux/notifier.h>
Paulo Marques543537b2005-06-23 00:09:02 -070065#include <linux/string.h>
Eric Dumazetddbe5032012-07-18 08:11:12 +000066#include <linux/hash.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
Eric W. Biederman457c4cb2007-09-12 12:01:34 +020068#include <net/net_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070069#include <net/sock.h>
70#include <net/snmp.h>
71
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +000072#include <net/af_ieee802154.h>
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +000073#include <net/firewire.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070074#include <net/ipv6.h>
75#include <net/protocol.h>
76#include <net/ndisc.h>
77#include <net/ip6_route.h>
78#include <net/addrconf.h>
79#include <net/tcp.h>
80#include <net/ip.h>
Thomas Graf5d620262006-08-15 00:35:02 -070081#include <net/netlink.h>
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -070082#include <net/pkt_sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070083#include <linux/if_tunnel.h>
84#include <linux/rtnetlink.h>
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +000085#include <linux/netconf.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070086
87#ifdef CONFIG_IPV6_PRIVACY
88#include <linux/random.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070089#endif
90
Stephen Hemmingere21e8462010-03-20 16:09:01 -070091#include <linux/uaccess.h>
Herbert Xu7f7d9a62007-04-24 21:54:09 -070092#include <asm/unaligned.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
94#include <linux/proc_fs.h>
95#include <linux/seq_file.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040096#include <linux/export.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070097
98/* Set to 3 to get tracing... */
99#define ACONF_DEBUG 2
100
101#if ACONF_DEBUG >= 3
102#define ADBG(x) printk x
103#else
104#define ADBG(x)
105#endif
106
107#define INFINITY_LIFE_TIME 0xFFFFFFFF
Thomas Graf18a31e12010-11-17 04:12:02 +0000108
109static inline u32 cstamp_delta(unsigned long cstamp)
110{
111 return (cstamp - INITIAL_JIFFIES) * 100UL / HZ;
112}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
114#ifdef CONFIG_SYSCTL
Pavel Emelyanovf52295a2007-12-02 00:58:37 +1100115static void addrconf_sysctl_register(struct inet6_dev *idev);
Pavel Emelyanov408c4762008-01-10 17:41:21 -0800116static void addrconf_sysctl_unregister(struct inet6_dev *idev);
117#else
118static inline void addrconf_sysctl_register(struct inet6_dev *idev)
119{
120}
121
122static inline void addrconf_sysctl_unregister(struct inet6_dev *idev)
123{
124}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125#endif
126
127#ifdef CONFIG_IPV6_PRIVACY
Sorin Dumitrueb7e0572012-08-30 02:01:45 +0000128static void __ipv6_regen_rndid(struct inet6_dev *idev);
129static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130static void ipv6_regen_rndid(unsigned long data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131#endif
132
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900133static int ipv6_generate_eui64(u8 *eui, struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134static int ipv6_count_addresses(struct inet6_dev *idev);
135
136/*
137 * Configured unicast address hash table
138 */
stephen hemmingerc2e21292010-03-17 20:31:10 +0000139static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE];
stephen hemminger5c578ae2010-03-17 20:31:11 +0000140static DEFINE_SPINLOCK(addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142static void addrconf_verify(unsigned long);
143
Ingo Molnar8d06afa2005-09-09 13:10:40 -0700144static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145static DEFINE_SPINLOCK(addrconf_verify_lock);
146
147static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
148static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
149
Jiri Pirko93d9b7d2010-03-10 10:28:56 +0000150static void addrconf_type_change(struct net_device *dev,
151 unsigned long event);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152static int addrconf_ifdown(struct net_device *dev, int how);
153
Romain Kuntz21caa662013-01-09 21:06:03 +0000154static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx,
155 int plen,
156 const struct net_device *dev,
157 u32 flags, u32 noflags);
158
David S. Millercf22f9a2012-04-14 21:37:40 -0400159static void addrconf_dad_start(struct inet6_ifaddr *ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160static void addrconf_dad_timer(unsigned long data);
161static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +0900162static void addrconf_dad_run(struct inet6_dev *idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163static void addrconf_rs_timer(unsigned long data);
164static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
165static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
166
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900167static void inet6_prefix_notify(int event, struct inet6_dev *idev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 struct prefix_info *pinfo);
David S. Miller3e81c6d2010-03-20 16:18:00 -0700169static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
170 struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171
Adrian Bunk888c8482008-07-22 14:21:58 -0700172static struct ipv6_devconf ipv6_devconf __read_mostly = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 .forwarding = 0,
174 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
175 .mtu6 = IPV6_MIN_MTU,
176 .accept_ra = 1,
177 .accept_redirects = 1,
178 .autoconf = 1,
179 .force_mld_version = 0,
180 .dad_transmits = 1,
181 .rtr_solicits = MAX_RTR_SOLICITATIONS,
182 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
183 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
184#ifdef CONFIG_IPV6_PRIVACY
185 .use_tempaddr = 0,
186 .temp_valid_lft = TEMP_VALID_LIFETIME,
187 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
188 .regen_max_retry = REGEN_MAX_RETRY,
189 .max_desync_factor = MAX_DESYNC_FACTOR,
190#endif
191 .max_addresses = IPV6_MAX_ADDRESSES,
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -0800192 .accept_ra_defrtr = 1,
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -0800193 .accept_ra_pinfo = 1,
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800194#ifdef CONFIG_IPV6_ROUTER_PREF
195 .accept_ra_rtr_pref = 1,
YOSHIFUJI Hideaki52e16352006-03-20 17:05:47 -0800196 .rtr_probe_interval = 60 * HZ,
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -0800197#ifdef CONFIG_IPV6_ROUTE_INFO
198 .accept_ra_rt_info_max_plen = 0,
199#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800200#endif
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -0700201 .proxy_ndp = 0,
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -0700202 .accept_source_route = 0, /* we do not accept RH0 by default. */
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +0900203 .disable_ipv6 = 0,
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900204 .accept_dad = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205};
206
Brian Haleyab32ea52006-09-22 14:15:41 -0700207static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 .forwarding = 0,
209 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
210 .mtu6 = IPV6_MIN_MTU,
211 .accept_ra = 1,
212 .accept_redirects = 1,
213 .autoconf = 1,
214 .dad_transmits = 1,
215 .rtr_solicits = MAX_RTR_SOLICITATIONS,
216 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
217 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
218#ifdef CONFIG_IPV6_PRIVACY
219 .use_tempaddr = 0,
220 .temp_valid_lft = TEMP_VALID_LIFETIME,
221 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
222 .regen_max_retry = REGEN_MAX_RETRY,
223 .max_desync_factor = MAX_DESYNC_FACTOR,
224#endif
225 .max_addresses = IPV6_MAX_ADDRESSES,
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -0800226 .accept_ra_defrtr = 1,
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -0800227 .accept_ra_pinfo = 1,
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800228#ifdef CONFIG_IPV6_ROUTER_PREF
229 .accept_ra_rtr_pref = 1,
YOSHIFUJI Hideaki52e16352006-03-20 17:05:47 -0800230 .rtr_probe_interval = 60 * HZ,
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -0800231#ifdef CONFIG_IPV6_ROUTE_INFO
232 .accept_ra_rt_info_max_plen = 0,
233#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800234#endif
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -0700235 .proxy_ndp = 0,
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -0700236 .accept_source_route = 0, /* we do not accept RH0 by default. */
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +0900237 .disable_ipv6 = 0,
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900238 .accept_dad = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239};
240
241/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +0900244const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT;
245const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
Hannes Frederic Sowa2c5e8932013-02-10 03:50:18 +0000246const struct in6_addr in6addr_interfacelocal_allnodes = IN6ADDR_INTERFACELOCAL_ALLNODES_INIT;
247const struct in6_addr in6addr_interfacelocal_allrouters = IN6ADDR_INTERFACELOCAL_ALLROUTERS_INIT;
248const struct in6_addr in6addr_sitelocal_allrouters = IN6ADDR_SITELOCAL_ALLROUTERS_INIT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -0700250/* Check if a valid qdisc is available */
David S. Miller05297942008-07-08 23:01:27 -0700251static inline bool addrconf_qdisc_ok(const struct net_device *dev)
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -0700252{
David S. Miller05297942008-07-08 23:01:27 -0700253 return !qdisc_tx_is_noop(dev);
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -0700254}
255
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256static void addrconf_del_timer(struct inet6_ifaddr *ifp)
257{
258 if (del_timer(&ifp->timer))
259 __in6_ifa_put(ifp);
260}
261
Stephen Hemmingere21e8462010-03-20 16:09:01 -0700262enum addrconf_timer_t {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 AC_NONE,
264 AC_DAD,
265 AC_RS,
266};
267
268static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
269 enum addrconf_timer_t what,
270 unsigned long when)
271{
272 if (!del_timer(&ifp->timer))
273 in6_ifa_hold(ifp);
274
275 switch (what) {
276 case AC_DAD:
277 ifp->timer.function = addrconf_dad_timer;
278 break;
279 case AC_RS:
280 ifp->timer.function = addrconf_rs_timer;
281 break;
Stephen Hemmingere21e8462010-03-20 16:09:01 -0700282 default:
283 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 }
285 ifp->timer.expires = jiffies + when;
286 add_timer(&ifp->timer);
287}
288
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700289static int snmp6_alloc_dev(struct inet6_dev *idev)
290{
Tejun Heo7d720c32010-02-16 15:20:26 +0000291 if (snmp_mib_init((void __percpu **)idev->stats.ipv6,
Eric Dumazet1823e4c82010-06-22 20:58:41 +0000292 sizeof(struct ipstats_mib),
293 __alignof__(struct ipstats_mib)) < 0)
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700294 goto err_ip;
Eric Dumazetbe281e52011-05-19 01:14:23 +0000295 idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device),
296 GFP_KERNEL);
297 if (!idev->stats.icmpv6dev)
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700298 goto err_icmp;
Eric Dumazetbe281e52011-05-19 01:14:23 +0000299 idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device),
300 GFP_KERNEL);
301 if (!idev->stats.icmpv6msgdev)
David L Stevens14878f72007-09-16 16:52:35 -0700302 goto err_icmpmsg;
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700303
304 return 0;
305
David L Stevens14878f72007-09-16 16:52:35 -0700306err_icmpmsg:
Eric Dumazetbe281e52011-05-19 01:14:23 +0000307 kfree(idev->stats.icmpv6dev);
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700308err_icmp:
Tejun Heo7d720c32010-02-16 15:20:26 +0000309 snmp_mib_free((void __percpu **)idev->stats.ipv6);
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700310err_ip:
Pavel Emelyanovaaf70ec2007-10-17 21:25:32 -0700311 return -ENOMEM;
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700312}
313
Pavel Emelyanov16910b92007-10-17 21:23:43 -0700314static void snmp6_free_dev(struct inet6_dev *idev)
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700315{
Eric Dumazetbe281e52011-05-19 01:14:23 +0000316 kfree(idev->stats.icmpv6msgdev);
317 kfree(idev->stats.icmpv6dev);
Tejun Heo7d720c32010-02-16 15:20:26 +0000318 snmp_mib_free((void __percpu **)idev->stats.ipv6);
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700319}
320
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321/* Nobody refers to this device, we may destroy it. */
322
323void in6_dev_finish_destroy(struct inet6_dev *idev)
324{
325 struct net_device *dev = idev->dev;
Ilpo Järvinen547b7922008-07-25 21:43:18 -0700326
stephen hemminger502a2ff2010-03-17 20:31:13 +0000327 WARN_ON(!list_empty(&idev->addr_list));
Ilpo Järvinen547b7922008-07-25 21:43:18 -0700328 WARN_ON(idev->mc_list != NULL);
329
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330#ifdef NET_REFCNT_DEBUG
Joe Perches91df42b2012-05-15 14:11:54 +0000331 pr_debug("%s: %s\n", __func__, dev ? dev->name : "NIL");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332#endif
333 dev_put(dev);
334 if (!idev->dead) {
Joe Perchesf3213832012-05-15 14:11:53 +0000335 pr_warn("Freeing alive inet6 device %p\n", idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 return;
337 }
338 snmp6_free_dev(idev);
Lai Jiangshan38f57d12011-03-15 17:59:14 +0800339 kfree_rcu(idev, rcu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340}
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900341EXPORT_SYMBOL(in6_dev_finish_destroy);
342
Eldad Zack8e5e8f32012-04-01 07:49:08 +0000343static struct inet6_dev *ipv6_add_dev(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344{
345 struct inet6_dev *ndev;
346
347 ASSERT_RTNL();
348
349 if (dev->mtu < IPV6_MIN_MTU)
350 return NULL;
351
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900352 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900354 if (ndev == NULL)
355 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356
Ingo Oeser322f74a2006-03-20 23:01:47 -0800357 rwlock_init(&ndev->lock);
358 ndev->dev = dev;
stephen hemminger502a2ff2010-03-17 20:31:13 +0000359 INIT_LIST_HEAD(&ndev->addr_list);
360
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900361 memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf));
Ingo Oeser322f74a2006-03-20 23:01:47 -0800362 ndev->cnf.mtu6 = dev->mtu;
363 ndev->cnf.sysctl = NULL;
364 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
365 if (ndev->nd_parms == NULL) {
366 kfree(ndev);
367 return NULL;
368 }
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700369 if (ndev->cnf.forwarding)
370 dev_disable_lro(dev);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800371 /* We refer to the device */
372 dev_hold(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373
Ingo Oeser322f74a2006-03-20 23:01:47 -0800374 if (snmp6_alloc_dev(ndev) < 0) {
375 ADBG((KERN_WARNING
Joe Perchesf3213832012-05-15 14:11:53 +0000376 "%s: cannot allocate memory for statistics; dev=%s.\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800377 __func__, dev->name));
Ingo Oeser322f74a2006-03-20 23:01:47 -0800378 neigh_parms_release(&nd_tbl, ndev->nd_parms);
Roy Li8603e332011-09-20 15:10:16 -0400379 dev_put(dev);
380 kfree(ndev);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800381 return NULL;
382 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383
Ingo Oeser322f74a2006-03-20 23:01:47 -0800384 if (snmp6_register_dev(ndev) < 0) {
385 ADBG((KERN_WARNING
Joe Perchesf3213832012-05-15 14:11:53 +0000386 "%s: cannot create /proc/net/dev_snmp6/%s\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800387 __func__, dev->name));
Ingo Oeser322f74a2006-03-20 23:01:47 -0800388 neigh_parms_release(&nd_tbl, ndev->nd_parms);
389 ndev->dead = 1;
390 in6_dev_finish_destroy(ndev);
391 return NULL;
392 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393
Ingo Oeser322f74a2006-03-20 23:01:47 -0800394 /* One reference from device. We must do this before
395 * we invoke __ipv6_regen_rndid().
396 */
397 in6_dev_hold(ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900399 if (dev->flags & (IFF_NOARP | IFF_LOOPBACK))
400 ndev->cnf.accept_dad = -1;
401
Amerigo Wang07a93622012-10-29 16:23:10 +0000402#if IS_ENABLED(CONFIG_IPV6_SIT)
YOSHIFUJI Hideakib077d7a2008-04-13 23:42:18 -0700403 if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) {
Joe Perchesf3213832012-05-15 14:11:53 +0000404 pr_info("%s: Disabled Multicast RS\n", dev->name);
YOSHIFUJI Hideakib077d7a2008-04-13 23:42:18 -0700405 ndev->cnf.rtr_solicits = 0;
406 }
407#endif
408
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409#ifdef CONFIG_IPV6_PRIVACY
stephen hemminger372e6c82010-03-17 20:31:09 +0000410 INIT_LIST_HEAD(&ndev->tempaddr_list);
Pavel Emelyanovb24b8a22008-01-23 21:20:07 -0800411 setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800412 if ((dev->flags&IFF_LOOPBACK) ||
413 dev->type == ARPHRD_TUNNEL ||
YOSHIFUJI Hideaki9625ed72008-04-13 23:47:11 -0700414 dev->type == ARPHRD_TUNNEL6 ||
Joerg Roedel0be669b2006-10-10 14:49:53 -0700415 dev->type == ARPHRD_SIT ||
Joerg Roedel0be669b2006-10-10 14:49:53 -0700416 dev->type == ARPHRD_NONE) {
Ingo Oeser322f74a2006-03-20 23:01:47 -0800417 ndev->cnf.use_tempaddr = -1;
418 } else {
419 in6_dev_hold(ndev);
420 ipv6_regen_rndid((unsigned long) ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 }
Ingo Oeser322f74a2006-03-20 23:01:47 -0800422#endif
Daniel Borkmann914faa12013-04-09 03:47:14 +0000423 ndev->token = in6addr_any;
Ingo Oeser322f74a2006-03-20 23:01:47 -0800424
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -0700425 if (netif_running(dev) && addrconf_qdisc_ok(dev))
Herbert Xu53aadcc2007-03-27 14:31:52 -0700426 ndev->if_flags |= IF_READY;
427
Ingo Oeser322f74a2006-03-20 23:01:47 -0800428 ipv6_mc_init_dev(ndev);
429 ndev->tstamp = jiffies;
Pavel Emelyanovf52295a2007-12-02 00:58:37 +1100430 addrconf_sysctl_register(ndev);
David L Stevens30c4cf52007-01-04 12:31:14 -0800431 /* protected by rtnl_lock */
Eric Dumazetcf778b02012-01-12 04:41:32 +0000432 rcu_assign_pointer(dev->ip6_ptr, ndev);
YOSHIFUJI Hideakid88ae4c2007-01-14 21:48:40 -0800433
Hannes Frederic Sowa2c5e8932013-02-10 03:50:18 +0000434 /* Join interface-local all-node multicast group */
435 ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allnodes);
436
YOSHIFUJI Hideakid88ae4c2007-01-14 21:48:40 -0800437 /* Join all-node multicast group */
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +0900438 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
YOSHIFUJI Hideakid88ae4c2007-01-14 21:48:40 -0800439
Li Weid6ddef92012-03-05 14:45:17 +0000440 /* Join all-router multicast group if forwarding is set */
Li Wei8b2aaed2012-03-07 14:58:07 +0000441 if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST))
Li Weid6ddef92012-03-05 14:45:17 +0000442 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
443
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 return ndev;
445}
446
Eldad Zack8e5e8f32012-04-01 07:49:08 +0000447static struct inet6_dev *ipv6_find_idev(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448{
449 struct inet6_dev *idev;
450
451 ASSERT_RTNL();
452
Stephen Hemmingere21e8462010-03-20 16:09:01 -0700453 idev = __in6_dev_get(dev);
454 if (!idev) {
455 idev = ipv6_add_dev(dev);
456 if (!idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 return NULL;
458 }
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +0900459
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 if (dev->flags&IFF_UP)
461 ipv6_mc_up(idev);
462 return idev;
463}
464
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000465static int inet6_netconf_msgsize_devconf(int type)
466{
467 int size = NLMSG_ALIGN(sizeof(struct netconfmsg))
468 + nla_total_size(4); /* NETCONFA_IFINDEX */
469
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000470 /* type -1 is used for ALL */
471 if (type == -1 || type == NETCONFA_FORWARDING)
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000472 size += nla_total_size(4);
David S. Millerb1afce92012-12-04 14:46:34 -0500473#ifdef CONFIG_IPV6_MROUTE
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000474 if (type == -1 || type == NETCONFA_MC_FORWARDING)
475 size += nla_total_size(4);
David S. Millerb1afce92012-12-04 14:46:34 -0500476#endif
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000477
478 return size;
479}
480
481static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex,
482 struct ipv6_devconf *devconf, u32 portid,
483 u32 seq, int event, unsigned int flags,
484 int type)
485{
486 struct nlmsghdr *nlh;
487 struct netconfmsg *ncm;
488
489 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg),
490 flags);
491 if (nlh == NULL)
492 return -EMSGSIZE;
493
494 ncm = nlmsg_data(nlh);
495 ncm->ncm_family = AF_INET6;
496
497 if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0)
498 goto nla_put_failure;
499
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000500 /* type -1 is used for ALL */
501 if ((type == -1 || type == NETCONFA_FORWARDING) &&
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000502 nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0)
503 goto nla_put_failure;
David S. Millerb1afce92012-12-04 14:46:34 -0500504#ifdef CONFIG_IPV6_MROUTE
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000505 if ((type == -1 || type == NETCONFA_MC_FORWARDING) &&
506 nla_put_s32(skb, NETCONFA_MC_FORWARDING,
507 devconf->mc_forwarding) < 0)
508 goto nla_put_failure;
David S. Millerb1afce92012-12-04 14:46:34 -0500509#endif
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000510 return nlmsg_end(skb, nlh);
511
512nla_put_failure:
513 nlmsg_cancel(skb, nlh);
514 return -EMSGSIZE;
515}
516
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000517void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
518 struct ipv6_devconf *devconf)
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000519{
520 struct sk_buff *skb;
521 int err = -ENOBUFS;
522
523 skb = nlmsg_new(inet6_netconf_msgsize_devconf(type), GFP_ATOMIC);
524 if (skb == NULL)
525 goto errout;
526
527 err = inet6_netconf_fill_devconf(skb, ifindex, devconf, 0, 0,
528 RTM_NEWNETCONF, 0, type);
529 if (err < 0) {
530 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
531 WARN_ON(err == -EMSGSIZE);
532 kfree_skb(skb);
533 goto errout;
534 }
535 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_NETCONF, NULL, GFP_ATOMIC);
536 return;
537errout:
Cong Dingbd779022012-12-18 12:08:56 +0000538 rtnl_set_sk_err(net, RTNLGRP_IPV6_NETCONF, err);
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000539}
540
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000541static const struct nla_policy devconf_ipv6_policy[NETCONFA_MAX+1] = {
542 [NETCONFA_IFINDEX] = { .len = sizeof(int) },
543 [NETCONFA_FORWARDING] = { .len = sizeof(int) },
544};
545
546static int inet6_netconf_get_devconf(struct sk_buff *in_skb,
Thomas Graf661d2962013-03-21 07:45:29 +0000547 struct nlmsghdr *nlh)
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000548{
549 struct net *net = sock_net(in_skb->sk);
550 struct nlattr *tb[NETCONFA_MAX+1];
551 struct netconfmsg *ncm;
552 struct sk_buff *skb;
553 struct ipv6_devconf *devconf;
554 struct inet6_dev *in6_dev;
555 struct net_device *dev;
556 int ifindex;
557 int err;
558
559 err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX,
560 devconf_ipv6_policy);
561 if (err < 0)
562 goto errout;
563
564 err = EINVAL;
565 if (!tb[NETCONFA_IFINDEX])
566 goto errout;
567
568 ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]);
569 switch (ifindex) {
570 case NETCONFA_IFINDEX_ALL:
571 devconf = net->ipv6.devconf_all;
572 break;
573 case NETCONFA_IFINDEX_DEFAULT:
574 devconf = net->ipv6.devconf_dflt;
575 break;
576 default:
577 dev = __dev_get_by_index(net, ifindex);
578 if (dev == NULL)
579 goto errout;
580 in6_dev = __in6_dev_get(dev);
581 if (in6_dev == NULL)
582 goto errout;
583 devconf = &in6_dev->cnf;
584 break;
585 }
586
587 err = -ENOBUFS;
588 skb = nlmsg_new(inet6_netconf_msgsize_devconf(-1), GFP_ATOMIC);
589 if (skb == NULL)
590 goto errout;
591
592 err = inet6_netconf_fill_devconf(skb, ifindex, devconf,
593 NETLINK_CB(in_skb).portid,
594 nlh->nlmsg_seq, RTM_NEWNETCONF, 0,
595 -1);
596 if (err < 0) {
597 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
598 WARN_ON(err == -EMSGSIZE);
599 kfree_skb(skb);
600 goto errout;
601 }
602 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
603errout:
604 return err;
605}
606
Nicolas Dichtel7a674202013-03-05 23:42:06 +0000607static int inet6_netconf_dump_devconf(struct sk_buff *skb,
608 struct netlink_callback *cb)
609{
610 struct net *net = sock_net(skb->sk);
611 int h, s_h;
612 int idx, s_idx;
613 struct net_device *dev;
614 struct inet6_dev *idev;
615 struct hlist_head *head;
616
617 s_h = cb->args[0];
618 s_idx = idx = cb->args[1];
619
620 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
621 idx = 0;
622 head = &net->dev_index_head[h];
623 rcu_read_lock();
Nicolas Dichtel63998ac2013-03-22 06:28:43 +0000624 cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^
625 net->dev_base_seq;
Nicolas Dichtel7a674202013-03-05 23:42:06 +0000626 hlist_for_each_entry_rcu(dev, head, index_hlist) {
627 if (idx < s_idx)
628 goto cont;
629 idev = __in6_dev_get(dev);
630 if (!idev)
631 goto cont;
632
633 if (inet6_netconf_fill_devconf(skb, dev->ifindex,
634 &idev->cnf,
635 NETLINK_CB(cb->skb).portid,
636 cb->nlh->nlmsg_seq,
637 RTM_NEWNETCONF,
638 NLM_F_MULTI,
639 -1) <= 0) {
640 rcu_read_unlock();
641 goto done;
642 }
Nicolas Dichtel63998ac2013-03-22 06:28:43 +0000643 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
Nicolas Dichtel7a674202013-03-05 23:42:06 +0000644cont:
645 idx++;
646 }
647 rcu_read_unlock();
648 }
649 if (h == NETDEV_HASHENTRIES) {
650 if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL,
651 net->ipv6.devconf_all,
652 NETLINK_CB(cb->skb).portid,
653 cb->nlh->nlmsg_seq,
654 RTM_NEWNETCONF, NLM_F_MULTI,
655 -1) <= 0)
656 goto done;
657 else
658 h++;
659 }
660 if (h == NETDEV_HASHENTRIES + 1) {
661 if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT,
662 net->ipv6.devconf_dflt,
663 NETLINK_CB(cb->skb).portid,
664 cb->nlh->nlmsg_seq,
665 RTM_NEWNETCONF, NLM_F_MULTI,
666 -1) <= 0)
667 goto done;
668 else
669 h++;
670 }
671done:
672 cb->args[0] = h;
673 cb->args[1] = idx;
674
675 return skb->len;
676}
677
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678#ifdef CONFIG_SYSCTL
679static void dev_forward_change(struct inet6_dev *idev)
680{
681 struct net_device *dev;
682 struct inet6_ifaddr *ifa;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683
684 if (!idev)
685 return;
686 dev = idev->dev;
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700687 if (idev->cnf.forwarding)
688 dev_disable_lro(dev);
Amerigo Wang1a940832012-10-28 17:43:53 +0000689 if (dev->flags & IFF_MULTICAST) {
Hannes Frederic Sowa2c5e8932013-02-10 03:50:18 +0000690 if (idev->cnf.forwarding) {
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +0900691 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
Hannes Frederic Sowa2c5e8932013-02-10 03:50:18 +0000692 ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allrouters);
693 ipv6_dev_mc_inc(dev, &in6addr_sitelocal_allrouters);
694 } else {
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +0900695 ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters);
Hannes Frederic Sowa2c5e8932013-02-10 03:50:18 +0000696 ipv6_dev_mc_dec(dev, &in6addr_interfacelocal_allrouters);
697 ipv6_dev_mc_dec(dev, &in6addr_sitelocal_allrouters);
698 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699 }
stephen hemminger502a2ff2010-03-17 20:31:13 +0000700
701 list_for_each_entry(ifa, &idev->addr_list, if_list) {
Michal Wrobel2c12a742007-02-26 15:36:10 -0800702 if (ifa->flags&IFA_F_TENTATIVE)
703 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704 if (idev->cnf.forwarding)
705 addrconf_join_anycast(ifa);
706 else
707 addrconf_leave_anycast(ifa);
708 }
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000709 inet6_netconf_notify_devconf(dev_net(dev), NETCONFA_FORWARDING,
710 dev->ifindex, &idev->cnf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711}
712
713
Pavel Emelyanove1869322008-01-10 17:43:50 -0800714static void addrconf_forward_change(struct net *net, __s32 newf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715{
716 struct net_device *dev;
717 struct inet6_dev *idev;
718
Ben Hutchings4acd4942012-08-14 08:54:51 +0000719 for_each_netdev(net, dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720 idev = __in6_dev_get(dev);
721 if (idev) {
Pavel Emelyanove1869322008-01-10 17:43:50 -0800722 int changed = (!idev->cnf.forwarding) ^ (!newf);
723 idev->cnf.forwarding = newf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724 if (changed)
725 dev_forward_change(idev);
726 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728}
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800729
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000730static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf)
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800731{
Pavel Emelyanovbff16c22008-01-10 17:42:13 -0800732 struct net *net;
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000733 int old;
734
735 if (!rtnl_trylock())
736 return restart_syscall();
Pavel Emelyanovbff16c22008-01-10 17:42:13 -0800737
738 net = (struct net *)table->extra2;
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000739 old = *p;
740 *p = newf;
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800741
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000742 if (p == &net->ipv6.devconf_dflt->forwarding) {
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000743 if ((!newf) ^ (!old))
744 inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING,
745 NETCONFA_IFINDEX_DEFAULT,
746 net->ipv6.devconf_dflt);
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000747 rtnl_unlock();
748 return 0;
Eric W. Biederman88af1822010-02-19 13:22:59 +0000749 }
Stephen Hemmingerb325fdd2009-02-26 06:55:31 +0000750
Pavel Emelyanove1869322008-01-10 17:43:50 -0800751 if (p == &net->ipv6.devconf_all->forwarding) {
Pavel Emelyanove1869322008-01-10 17:43:50 -0800752 net->ipv6.devconf_dflt->forwarding = newf;
753 addrconf_forward_change(net, newf);
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000754 if ((!newf) ^ (!old))
755 inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING,
756 NETCONFA_IFINDEX_ALL,
757 net->ipv6.devconf_all);
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000758 } else if ((!newf) ^ (!old))
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800759 dev_forward_change((struct inet6_dev *)table->extra1);
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700760 rtnl_unlock();
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800761
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000762 if (newf)
Daniel Lezcano7b4da532008-03-04 13:47:14 -0800763 rt6_purge_dflt_routers(net);
Stephen Hemmingerb325fdd2009-02-26 06:55:31 +0000764 return 1;
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800765}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766#endif
767
stephen hemminger5c578ae2010-03-17 20:31:11 +0000768/* Nobody refers to this ifaddr, destroy it */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
770{
stephen hemmingerc2e21292010-03-17 20:31:10 +0000771 WARN_ON(!hlist_unhashed(&ifp->addr_lst));
Ilpo Järvinen547b7922008-07-25 21:43:18 -0700772
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773#ifdef NET_REFCNT_DEBUG
Joe Perches91df42b2012-05-15 14:11:54 +0000774 pr_debug("%s\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775#endif
776
777 in6_dev_put(ifp->idev);
778
779 if (del_timer(&ifp->timer))
Stephen Hemmingere21e8462010-03-20 16:09:01 -0700780 pr_notice("Timer is still running, when freeing ifa=%p\n", ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781
Herbert Xue9d3e082010-05-18 15:36:06 -0700782 if (ifp->state != INET6_IFADDR_STATE_DEAD) {
Joe Perchesf3213832012-05-15 14:11:53 +0000783 pr_warn("Freeing alive inet6 address %p\n", ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784 return;
785 }
Amerigo Wang94e187c2012-10-29 00:13:19 +0000786 ip6_rt_put(ifp->rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787
Lai Jiangshane5785982011-03-15 18:00:14 +0800788 kfree_rcu(ifp, rcu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789}
790
Brian Haleye55ffac2006-07-10 15:25:51 -0700791static void
792ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
793{
stephen hemminger502a2ff2010-03-17 20:31:13 +0000794 struct list_head *p;
YOSHIFUJI Hideaki8a6ce0c2006-07-11 13:05:30 -0700795 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
Brian Haleye55ffac2006-07-10 15:25:51 -0700796
797 /*
798 * Each device address list is sorted in order of scope -
799 * global before linklocal.
800 */
stephen hemminger502a2ff2010-03-17 20:31:13 +0000801 list_for_each(p, &idev->addr_list) {
802 struct inet6_ifaddr *ifa
803 = list_entry(p, struct inet6_ifaddr, if_list);
YOSHIFUJI Hideaki8a6ce0c2006-07-11 13:05:30 -0700804 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
Brian Haleye55ffac2006-07-10 15:25:51 -0700805 break;
806 }
807
David S. Millerb54c9b92010-03-25 21:25:30 -0700808 list_add_tail(&ifp->if_list, p);
Brian Haleye55ffac2006-07-10 15:25:51 -0700809}
810
Eric Dumazetddbe5032012-07-18 08:11:12 +0000811static u32 inet6_addr_hash(const struct in6_addr *addr)
YOSHIFUJI Hideaki3eb84f42008-04-10 15:42:08 +0900812{
Eric Dumazetddbe5032012-07-18 08:11:12 +0000813 return hash_32(ipv6_addr_hash(addr), IN6_ADDR_HSIZE_SHIFT);
YOSHIFUJI Hideaki3eb84f42008-04-10 15:42:08 +0900814}
815
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816/* On success it returns ifp with increased reference count */
817
818static struct inet6_ifaddr *
819ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
Jamal Hadi Salime431b8c2005-06-18 22:55:31 -0700820 int scope, u32 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821{
822 struct inet6_ifaddr *ifa = NULL;
823 struct rt6_info *rt;
stephen hemminger3a88a812010-03-17 20:31:12 +0000824 unsigned int hash;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825 int err = 0;
YOSHIFUJI Hideakid68b8272008-06-25 16:26:47 +0900826 int addr_type = ipv6_addr_type(addr);
827
828 if (addr_type == IPV6_ADDR_ANY ||
829 addr_type & IPV6_ADDR_MULTICAST ||
830 (!(idev->dev->flags & IFF_LOOPBACK) &&
831 addr_type & IPV6_ADDR_LOOPBACK))
832 return ERR_PTR(-EADDRNOTAVAIL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700834 rcu_read_lock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 if (idev->dead) {
836 err = -ENODEV; /*XXX*/
837 goto out2;
838 }
839
Brian Haley56d417b2009-06-01 03:07:33 -0700840 if (idev->cnf.disable_ipv6) {
Brian Haley9bdd8d42009-03-18 18:22:48 -0700841 err = -EACCES;
842 goto out2;
843 }
844
stephen hemminger5c578ae2010-03-17 20:31:11 +0000845 spin_lock(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846
847 /* Ignore adding duplicate addresses on an interface */
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900848 if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849 ADBG(("ipv6_add_addr: already assigned\n"));
850 err = -EEXIST;
851 goto out;
852 }
853
Ingo Oeser322f74a2006-03-20 23:01:47 -0800854 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855
856 if (ifa == NULL) {
857 ADBG(("ipv6_add_addr: malloc failed\n"));
858 err = -ENOBUFS;
859 goto out;
860 }
861
David S. Miller8f031512011-12-06 16:48:14 -0500862 rt = addrconf_dst_alloc(idev, addr, false);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863 if (IS_ERR(rt)) {
864 err = PTR_ERR(rt);
865 goto out;
866 }
867
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000868 ifa->addr = *addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869
870 spin_lock_init(&ifa->lock);
Herbert Xue9d3e082010-05-18 15:36:06 -0700871 spin_lock_init(&ifa->state_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872 init_timer(&ifa->timer);
stephen hemmingerc2e21292010-03-17 20:31:10 +0000873 INIT_HLIST_NODE(&ifa->addr_lst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874 ifa->timer.data = (unsigned long) ifa;
875 ifa->scope = scope;
876 ifa->prefix_len = pfxlen;
877 ifa->flags = flags | IFA_F_TENTATIVE;
878 ifa->cstamp = ifa->tstamp = jiffies;
Daniel Borkmann617fe292013-04-09 03:47:16 +0000879 ifa->tokenized = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880
Keir Fraser57f5f542006-08-29 02:43:49 -0700881 ifa->rt = rt;
882
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883 ifa->idev = idev;
884 in6_dev_hold(idev);
885 /* For caller */
886 in6_ifa_hold(ifa);
887
888 /* Add to big hash table */
Eric Dumazetddbe5032012-07-18 08:11:12 +0000889 hash = inet6_addr_hash(addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890
stephen hemminger5c578ae2010-03-17 20:31:11 +0000891 hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]);
stephen hemminger5c578ae2010-03-17 20:31:11 +0000892 spin_unlock(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893
894 write_lock(&idev->lock);
895 /* Add to inet6_dev unicast addr list. */
Brian Haleye55ffac2006-07-10 15:25:51 -0700896 ipv6_link_dev_addr(idev, ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897
898#ifdef CONFIG_IPV6_PRIVACY
899 if (ifa->flags&IFA_F_TEMPORARY) {
stephen hemminger372e6c82010-03-17 20:31:09 +0000900 list_add(&ifa->tmp_list, &idev->tempaddr_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901 in6_ifa_hold(ifa);
902 }
903#endif
904
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 in6_ifa_hold(ifa);
906 write_unlock(&idev->lock);
907out2:
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700908 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909
YOSHIFUJI Hideakifd928332005-04-19 22:27:09 -0700910 if (likely(err == 0))
Cong Wangf88c91d2013-04-14 23:18:43 +0800911 inet6addr_notifier_call_chain(NETDEV_UP, ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912 else {
913 kfree(ifa);
914 ifa = ERR_PTR(err);
915 }
916
917 return ifa;
918out:
stephen hemminger5c578ae2010-03-17 20:31:11 +0000919 spin_unlock(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 goto out2;
921}
922
923/* This function wants to get referenced ifp and releases it before return */
924
925static void ipv6_del_addr(struct inet6_ifaddr *ifp)
926{
stephen hemminger502a2ff2010-03-17 20:31:13 +0000927 struct inet6_ifaddr *ifa, *ifn;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928 struct inet6_dev *idev = ifp->idev;
Herbert Xu4c5ff6a2010-05-18 15:54:18 -0700929 int state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930 int deleted = 0, onlink = 0;
931 unsigned long expires = jiffies;
932
Herbert Xu4c5ff6a2010-05-18 15:54:18 -0700933 spin_lock_bh(&ifp->state_lock);
934 state = ifp->state;
Herbert Xue9d3e082010-05-18 15:36:06 -0700935 ifp->state = INET6_IFADDR_STATE_DEAD;
Herbert Xu4c5ff6a2010-05-18 15:54:18 -0700936 spin_unlock_bh(&ifp->state_lock);
937
938 if (state == INET6_IFADDR_STATE_DEAD)
939 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940
stephen hemminger5c578ae2010-03-17 20:31:11 +0000941 spin_lock_bh(&addrconf_hash_lock);
942 hlist_del_init_rcu(&ifp->addr_lst);
stephen hemminger5c578ae2010-03-17 20:31:11 +0000943 spin_unlock_bh(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944
945 write_lock_bh(&idev->lock);
946#ifdef CONFIG_IPV6_PRIVACY
947 if (ifp->flags&IFA_F_TEMPORARY) {
stephen hemminger372e6c82010-03-17 20:31:09 +0000948 list_del(&ifp->tmp_list);
949 if (ifp->ifpub) {
950 in6_ifa_put(ifp->ifpub);
951 ifp->ifpub = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952 }
stephen hemminger372e6c82010-03-17 20:31:09 +0000953 __in6_ifa_put(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954 }
955#endif
956
stephen hemminger502a2ff2010-03-17 20:31:13 +0000957 list_for_each_entry_safe(ifa, ifn, &idev->addr_list, if_list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958 if (ifa == ifp) {
stephen hemminger502a2ff2010-03-17 20:31:13 +0000959 list_del_init(&ifp->if_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960 __in6_ifa_put(ifp);
stephen hemminger502a2ff2010-03-17 20:31:13 +0000961
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
963 break;
964 deleted = 1;
Kristian Slavov1d142802005-12-21 18:47:24 -0800965 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966 } else if (ifp->flags & IFA_F_PERMANENT) {
967 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
968 ifp->prefix_len)) {
969 if (ifa->flags & IFA_F_PERMANENT) {
970 onlink = 1;
971 if (deleted)
972 break;
973 } else {
974 unsigned long lifetime;
975
976 if (!onlink)
977 onlink = -1;
978
979 spin_lock(&ifa->lock);
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +0900980
981 lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ);
982 /*
983 * Note: Because this address is
984 * not permanent, lifetime <
985 * LONG_MAX / HZ here.
986 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987 if (time_before(expires,
988 ifa->tstamp + lifetime * HZ))
989 expires = ifa->tstamp + lifetime * HZ;
990 spin_unlock(&ifa->lock);
991 }
992 }
993 }
994 }
995 write_unlock_bh(&idev->lock);
996
Andrey Vaginb2238562008-07-08 15:13:31 -0700997 addrconf_del_timer(ifp);
998
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999 ipv6_ifa_notify(RTM_DELADDR, ifp);
1000
Cong Wangf88c91d2013-04-14 23:18:43 +08001001 inet6addr_notifier_call_chain(NETDEV_DOWN, ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001002
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003 /*
1004 * Purge or update corresponding prefix
1005 *
1006 * 1) we don't purge prefix here if address was not permanent.
1007 * prefix is managed by its own lifetime.
1008 * 2) if there're no addresses, delete prefix.
1009 * 3) if there're still other permanent address(es),
1010 * corresponding prefix is still permanent.
1011 * 4) otherwise, update prefix lifetime to the
1012 * longest valid lifetime among the corresponding
1013 * addresses on the device.
1014 * Note: subsequent RA will update lifetime.
1015 *
1016 * --yoshfuji
1017 */
1018 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
1019 struct in6_addr prefix;
1020 struct rt6_info *rt;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021
Nicolas Dichtel64c6d082012-09-26 00:04:55 +00001022 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
Nicolas Dichtel64c6d082012-09-26 00:04:55 +00001023
Romain Kuntz21caa662013-01-09 21:06:03 +00001024 rt = addrconf_get_prefix_route(&prefix,
1025 ifp->prefix_len,
1026 ifp->idev->dev,
1027 0, RTF_GATEWAY | RTF_DEFAULT);
1028
1029 if (rt) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030 if (onlink == 0) {
Thomas Grafe0a1ad732006-08-22 00:00:21 -07001031 ip6_del_rt(rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032 rt = NULL;
1033 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
Gao feng1716a962012-04-06 00:13:10 +00001034 rt6_set_expires(rt, expires);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 }
1036 }
Amerigo Wang94e187c2012-10-29 00:13:19 +00001037 ip6_rt_put(rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 }
1039
Daniel Walterc3968a82011-04-13 21:10:57 +00001040 /* clean up prefsrc entries */
1041 rt6_remove_prefsrc(ifp);
Herbert Xu4c5ff6a2010-05-18 15:54:18 -07001042out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043 in6_ifa_put(ifp);
1044}
1045
1046#ifdef CONFIG_IPV6_PRIVACY
1047static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
1048{
1049 struct inet6_dev *idev = ifp->idev;
1050 struct in6_addr addr, *tmpaddr;
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00001051 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age;
Benoit Boissinoteac55bf2008-04-02 00:01:35 -07001052 unsigned long regen_advance;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053 int tmp_plen;
1054 int ret = 0;
1055 int max_addresses;
Neil Horman95c385b2007-04-25 17:08:10 -07001056 u32 addr_flags;
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00001057 unsigned long now = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058
1059 write_lock(&idev->lock);
1060 if (ift) {
1061 spin_lock_bh(&ift->lock);
1062 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
1063 spin_unlock_bh(&ift->lock);
1064 tmpaddr = &addr;
1065 } else {
1066 tmpaddr = NULL;
1067 }
1068retry:
1069 in6_dev_hold(idev);
1070 if (idev->cnf.use_tempaddr <= 0) {
1071 write_unlock(&idev->lock);
Joe Perchesf3213832012-05-15 14:11:53 +00001072 pr_info("%s: use_tempaddr is disabled\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073 in6_dev_put(idev);
1074 ret = -1;
1075 goto out;
1076 }
1077 spin_lock_bh(&ifp->lock);
1078 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
1079 idev->cnf.use_tempaddr = -1; /*XXX*/
1080 spin_unlock_bh(&ifp->lock);
1081 write_unlock(&idev->lock);
Joe Perchesf3213832012-05-15 14:11:53 +00001082 pr_warn("%s: regeneration time exceeded - disabled temporary address support\n",
1083 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084 in6_dev_put(idev);
1085 ret = -1;
1086 goto out;
1087 }
1088 in6_ifa_hold(ifp);
1089 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00001090 __ipv6_try_regen_rndid(idev, tmpaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 memcpy(&addr.s6_addr[8], idev->rndid, 8);
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00001092 age = (now - ifp->tstamp) / HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093 tmp_valid_lft = min_t(__u32,
1094 ifp->valid_lft,
Glenn Wurster7a876b02010-09-27 07:10:10 +00001095 idev->cnf.temp_valid_lft + age);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001096 tmp_prefered_lft = min_t(__u32,
1097 ifp->prefered_lft,
Glenn Wurster7a876b02010-09-27 07:10:10 +00001098 idev->cnf.temp_prefered_lft + age -
Ben Hutchings784e2712010-06-26 11:42:55 +00001099 idev->cnf.max_desync_factor);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100 tmp_plen = ifp->prefix_len;
1101 max_addresses = idev->cnf.max_addresses;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102 tmp_tstamp = ifp->tstamp;
1103 spin_unlock_bh(&ifp->lock);
1104
Benoit Boissinoteac55bf2008-04-02 00:01:35 -07001105 regen_advance = idev->cnf.regen_max_retry *
1106 idev->cnf.dad_transmits *
1107 idev->nd_parms->retrans_time / HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108 write_unlock(&idev->lock);
Neil Horman95c385b2007-04-25 17:08:10 -07001109
Benoit Boissinoteac55bf2008-04-02 00:01:35 -07001110 /* A temporary address is created only if this calculated Preferred
1111 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
1112 * an implementation must not create a temporary address with a zero
1113 * Preferred Lifetime.
1114 */
1115 if (tmp_prefered_lft <= regen_advance) {
1116 in6_ifa_put(ifp);
1117 in6_dev_put(idev);
1118 ret = -1;
1119 goto out;
1120 }
1121
Neil Horman95c385b2007-04-25 17:08:10 -07001122 addr_flags = IFA_F_TEMPORARY;
1123 /* set in addrconf_prefix_rcv() */
1124 if (ifp->flags & IFA_F_OPTIMISTIC)
1125 addr_flags |= IFA_F_OPTIMISTIC;
1126
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127 ift = !max_addresses ||
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001128 ipv6_count_addresses(idev) < max_addresses ?
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129 ipv6_add_addr(idev, &addr, tmp_plen,
Neil Horman95c385b2007-04-25 17:08:10 -07001130 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK,
1131 addr_flags) : NULL;
YOSHIFUJI Hideaki / 吉藤英明3f0d2ba2013-01-22 06:32:54 +00001132 if (IS_ERR_OR_NULL(ift)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133 in6_ifa_put(ifp);
1134 in6_dev_put(idev);
Joe Perchesf3213832012-05-15 14:11:53 +00001135 pr_info("%s: retry temporary address regeneration\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136 tmpaddr = &addr;
1137 write_lock(&idev->lock);
1138 goto retry;
1139 }
1140
1141 spin_lock_bh(&ift->lock);
1142 ift->ifpub = ifp;
1143 ift->valid_lft = tmp_valid_lft;
1144 ift->prefered_lft = tmp_prefered_lft;
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00001145 ift->cstamp = now;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146 ift->tstamp = tmp_tstamp;
1147 spin_unlock_bh(&ift->lock);
1148
David S. Millercf22f9a2012-04-14 21:37:40 -04001149 addrconf_dad_start(ift);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150 in6_ifa_put(ift);
1151 in6_dev_put(idev);
1152out:
1153 return ret;
1154}
1155#endif
1156
1157/*
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001158 * Choose an appropriate source address (RFC3484)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159 */
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001160enum {
1161 IPV6_SADDR_RULE_INIT = 0,
1162 IPV6_SADDR_RULE_LOCAL,
1163 IPV6_SADDR_RULE_SCOPE,
1164 IPV6_SADDR_RULE_PREFERRED,
1165#ifdef CONFIG_IPV6_MIP6
1166 IPV6_SADDR_RULE_HOA,
1167#endif
1168 IPV6_SADDR_RULE_OIF,
1169 IPV6_SADDR_RULE_LABEL,
1170#ifdef CONFIG_IPV6_PRIVACY
1171 IPV6_SADDR_RULE_PRIVACY,
1172#endif
1173 IPV6_SADDR_RULE_ORCHID,
1174 IPV6_SADDR_RULE_PREFIX,
1175 IPV6_SADDR_RULE_MAX
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001176};
1177
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001178struct ipv6_saddr_score {
1179 int rule;
1180 int addr_type;
1181 struct inet6_ifaddr *ifa;
1182 DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX);
1183 int scopedist;
1184 int matchlen;
1185};
1186
1187struct ipv6_saddr_dst {
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +09001188 const struct in6_addr *addr;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001189 int ifindex;
1190 int scope;
1191 int label;
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001192 unsigned int prefs;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001193};
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001194
Dave Jonesb6f99a22007-03-22 12:27:49 -07001195static inline int ipv6_saddr_preferred(int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196{
Ulrich Weber45bb0062010-02-25 23:28:58 +00001197 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK))
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001198 return 1;
1199 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200}
1201
Benjamin Thery3de23252008-05-28 14:51:24 +02001202static int ipv6_get_saddr_eval(struct net *net,
1203 struct ipv6_saddr_score *score,
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001204 struct ipv6_saddr_dst *dst,
1205 int i)
1206{
1207 int ret;
1208
1209 if (i <= score->rule) {
1210 switch (i) {
1211 case IPV6_SADDR_RULE_SCOPE:
1212 ret = score->scopedist;
1213 break;
1214 case IPV6_SADDR_RULE_PREFIX:
1215 ret = score->matchlen;
1216 break;
1217 default:
1218 ret = !!test_bit(i, score->scorebits);
1219 }
1220 goto out;
1221 }
1222
1223 switch (i) {
1224 case IPV6_SADDR_RULE_INIT:
1225 /* Rule 0: remember if hiscore is not ready yet */
1226 ret = !!score->ifa;
1227 break;
1228 case IPV6_SADDR_RULE_LOCAL:
1229 /* Rule 1: Prefer same address */
1230 ret = ipv6_addr_equal(&score->ifa->addr, dst->addr);
1231 break;
1232 case IPV6_SADDR_RULE_SCOPE:
1233 /* Rule 2: Prefer appropriate scope
1234 *
1235 * ret
1236 * ^
1237 * -1 | d 15
1238 * ---+--+-+---> scope
1239 * |
1240 * | d is scope of the destination.
1241 * B-d | \
1242 * | \ <- smaller scope is better if
1243 * B-15 | \ if scope is enough for destinaion.
1244 * | ret = B - scope (-1 <= scope >= d <= 15).
1245 * d-C-1 | /
1246 * |/ <- greater is better
1247 * -C / if scope is not enough for destination.
1248 * /| ret = scope - C (-1 <= d < scope <= 15).
1249 *
1250 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1251 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1252 * Assume B = 0 and we get C > 29.
1253 */
1254 ret = __ipv6_addr_src_scope(score->addr_type);
1255 if (ret >= dst->scope)
1256 ret = -ret;
1257 else
1258 ret -= 128; /* 30 is enough */
1259 score->scopedist = ret;
1260 break;
1261 case IPV6_SADDR_RULE_PREFERRED:
1262 /* Rule 3: Avoid deprecated and optimistic addresses */
1263 ret = ipv6_saddr_preferred(score->addr_type) ||
1264 !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC));
1265 break;
1266#ifdef CONFIG_IPV6_MIP6
1267 case IPV6_SADDR_RULE_HOA:
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001268 {
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001269 /* Rule 4: Prefer home address */
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001270 int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA);
1271 ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001272 break;
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001273 }
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001274#endif
1275 case IPV6_SADDR_RULE_OIF:
1276 /* Rule 5: Prefer outgoing interface */
1277 ret = (!dst->ifindex ||
1278 dst->ifindex == score->ifa->idev->dev->ifindex);
1279 break;
1280 case IPV6_SADDR_RULE_LABEL:
1281 /* Rule 6: Prefer matching label */
Benjamin Thery3de23252008-05-28 14:51:24 +02001282 ret = ipv6_addr_label(net,
1283 &score->ifa->addr, score->addr_type,
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001284 score->ifa->idev->dev->ifindex) == dst->label;
1285 break;
1286#ifdef CONFIG_IPV6_PRIVACY
1287 case IPV6_SADDR_RULE_PRIVACY:
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001288 {
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001289 /* Rule 7: Prefer public address
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001290 * Note: prefer temporary address if use_tempaddr >= 2
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001291 */
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001292 int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ?
1293 !!(dst->prefs & IPV6_PREFER_SRC_TMP) :
1294 score->ifa->idev->cnf.use_tempaddr >= 2;
1295 ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001296 break;
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001297 }
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001298#endif
1299 case IPV6_SADDR_RULE_ORCHID:
1300 /* Rule 8-: Prefer ORCHID vs ORCHID or
1301 * non-ORCHID vs non-ORCHID
1302 */
1303 ret = !(ipv6_addr_orchid(&score->ifa->addr) ^
1304 ipv6_addr_orchid(dst->addr));
1305 break;
1306 case IPV6_SADDR_RULE_PREFIX:
1307 /* Rule 8: Use longest matching prefix */
YOSHIFUJI Hideaki / 吉藤英明91b4b042012-09-10 18:41:07 +00001308 ret = ipv6_addr_diff(&score->ifa->addr, dst->addr);
1309 if (ret > score->ifa->prefix_len)
1310 ret = score->ifa->prefix_len;
1311 score->matchlen = ret;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001312 break;
1313 default:
1314 ret = 0;
1315 }
1316
1317 if (ret)
1318 __set_bit(i, score->scorebits);
1319 score->rule = i;
1320out:
1321 return ret;
1322}
1323
Patrick McHardyb3f644f2012-08-26 19:14:14 +02001324int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +09001325 const struct in6_addr *daddr, unsigned int prefs,
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001326 struct in6_addr *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327{
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001328 struct ipv6_saddr_score scores[2],
1329 *score = &scores[0], *hiscore = &scores[1];
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001330 struct ipv6_saddr_dst dst;
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001331 struct net_device *dev;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001332 int dst_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001334 dst_type = __ipv6_addr_type(daddr);
1335 dst.addr = daddr;
1336 dst.ifindex = dst_dev ? dst_dev->ifindex : 0;
1337 dst.scope = __ipv6_addr_src_scope(dst_type);
Benjamin Thery3de23252008-05-28 14:51:24 +02001338 dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex);
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001339 dst.prefs = prefs;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001340
1341 hiscore->rule = -1;
1342 hiscore->ifa = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001343
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001344 rcu_read_lock();
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001345
Eric Dumazetc6d14c82009-11-04 05:43:23 -08001346 for_each_netdev_rcu(net, dev) {
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001347 struct inet6_dev *idev;
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001348
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001349 /* Candidate Source Address (section 4)
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001350 * - multicast and link-local destination address,
1351 * the set of candidate source address MUST only
1352 * include addresses assigned to interfaces
1353 * belonging to the same link as the outgoing
1354 * interface.
1355 * (- For site-local destination addresses, the
1356 * set of candidate source addresses MUST only
1357 * include addresses assigned to interfaces
1358 * belonging to the same site as the outgoing
1359 * interface.)
1360 */
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001361 if (((dst_type & IPV6_ADDR_MULTICAST) ||
1362 dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
1363 dst.ifindex && dev->ifindex != dst.ifindex)
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001364 continue;
1365
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366 idev = __in6_dev_get(dev);
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001367 if (!idev)
1368 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001370 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00001371 list_for_each_entry(score->ifa, &idev->addr_list, if_list) {
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001372 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001374 /*
YOSHIFUJI Hideaki6b3ae802005-12-21 22:58:01 +09001375 * - Tentative Address (RFC2462 section 5.4)
1376 * - A tentative address is not considered
1377 * "assigned to an interface" in the traditional
Neil Horman95c385b2007-04-25 17:08:10 -07001378 * sense, unless it is also flagged as optimistic.
YOSHIFUJI Hideaki6b3ae802005-12-21 22:58:01 +09001379 * - Candidate Source Address (section 4)
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001380 * - In any case, anycast addresses, multicast
1381 * addresses, and the unspecified address MUST
1382 * NOT be included in a candidate set.
1383 */
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001384 if ((score->ifa->flags & IFA_F_TENTATIVE) &&
1385 (!(score->ifa->flags & IFA_F_OPTIMISTIC)))
YOSHIFUJI Hideaki6b3ae802005-12-21 22:58:01 +09001386 continue;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001387
1388 score->addr_type = __ipv6_addr_type(&score->ifa->addr);
1389
1390 if (unlikely(score->addr_type == IPV6_ADDR_ANY ||
1391 score->addr_type & IPV6_ADDR_MULTICAST)) {
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001392 LIMIT_NETDEBUG(KERN_DEBUG
Joe Perches3b6d821c2007-11-19 23:47:25 -08001393 "ADDRCONF: unspecified / multicast address "
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001394 "assigned as unicast address on %s",
1395 dev->name);
1396 continue;
1397 }
1398
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001399 score->rule = -1;
1400 bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX);
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001401
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001402 for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) {
1403 int minihiscore, miniscore;
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001404
Benjamin Thery3de23252008-05-28 14:51:24 +02001405 minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i);
1406 miniscore = ipv6_get_saddr_eval(net, score, &dst, i);
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001407
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001408 if (minihiscore > miniscore) {
1409 if (i == IPV6_SADDR_RULE_SCOPE &&
1410 score->scopedist > 0) {
1411 /*
1412 * special case:
1413 * each remaining entry
1414 * has too small (not enough)
1415 * scope, because ifa entries
1416 * are sorted by their scope
1417 * values.
1418 */
1419 goto try_nextdev;
1420 }
1421 break;
1422 } else if (minihiscore < miniscore) {
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001423 if (hiscore->ifa)
1424 in6_ifa_put(hiscore->ifa);
1425
1426 in6_ifa_hold(score->ifa);
1427
Ilpo Järvinena0bffff2009-03-21 13:36:17 -07001428 swap(hiscore, score);
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001429
1430 /* restore our iterator */
1431 score->ifa = hiscore->ifa;
1432
1433 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001434 }
1435 }
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001436 }
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001437try_nextdev:
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001438 read_unlock_bh(&idev->lock);
1439 }
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001440 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001442 if (!hiscore->ifa)
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001443 return -EADDRNOTAVAIL;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001444
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +00001445 *saddr = hiscore->ifa->addr;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001446 in6_ifa_put(hiscore->ifa);
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001447 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448}
YOSHIFUJI Hideaki5e5f3f02008-03-03 21:44:34 +09001449EXPORT_SYMBOL(ipv6_dev_get_saddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450
Neil Horman95c385b2007-04-25 17:08:10 -07001451int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
1452 unsigned char banned_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001453{
1454 struct inet6_dev *idev;
1455 int err = -EADDRNOTAVAIL;
1456
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001457 rcu_read_lock();
Stephen Hemmingere21e8462010-03-20 16:09:01 -07001458 idev = __in6_dev_get(dev);
1459 if (idev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460 struct inet6_ifaddr *ifp;
1461
1462 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00001463 list_for_each_entry(ifp, &idev->addr_list, if_list) {
1464 if (ifp->scope == IFA_LINK &&
1465 !(ifp->flags & banned_flags)) {
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +00001466 *addr = ifp->addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001467 err = 0;
1468 break;
1469 }
1470 }
1471 read_unlock_bh(&idev->lock);
1472 }
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001473 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001474 return err;
1475}
1476
1477static int ipv6_count_addresses(struct inet6_dev *idev)
1478{
1479 int cnt = 0;
1480 struct inet6_ifaddr *ifp;
1481
1482 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00001483 list_for_each_entry(ifp, &idev->addr_list, if_list)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001484 cnt++;
1485 read_unlock_bh(&idev->lock);
1486 return cnt;
1487}
1488
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001489int ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
Daniel Lezcanobfeade02008-01-10 22:43:18 -08001490 struct net_device *dev, int strict)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001491{
Stephen Hemmingereedf0422010-05-17 22:27:12 -07001492 struct inet6_ifaddr *ifp;
Eric Dumazetddbe5032012-07-18 08:11:12 +00001493 unsigned int hash = inet6_addr_hash(addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001494
stephen hemminger5c578ae2010-03-17 20:31:11 +00001495 rcu_read_lock_bh();
Sasha Levinb67bfe02013-02-27 17:06:00 -08001496 hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09001497 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcanobfeade02008-01-10 22:43:18 -08001498 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001499 if (ipv6_addr_equal(&ifp->addr, addr) &&
Stephen Hemmingereedf0422010-05-17 22:27:12 -07001500 !(ifp->flags&IFA_F_TENTATIVE) &&
1501 (dev == NULL || ifp->idev->dev == dev ||
1502 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) {
1503 rcu_read_unlock_bh();
1504 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001505 }
1506 }
stephen hemminger5c578ae2010-03-17 20:31:11 +00001507
Stephen Hemmingereedf0422010-05-17 22:27:12 -07001508 rcu_read_unlock_bh();
1509 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001510}
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +09001511EXPORT_SYMBOL(ipv6_chk_addr);
1512
David S. Miller3e81c6d2010-03-20 16:18:00 -07001513static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
1514 struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515{
Eric Dumazetddbe5032012-07-18 08:11:12 +00001516 unsigned int hash = inet6_addr_hash(addr);
stephen hemmingerc2e21292010-03-17 20:31:10 +00001517 struct inet6_ifaddr *ifp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001518
Sasha Levinb67bfe02013-02-27 17:06:00 -08001519 hlist_for_each_entry(ifp, &inet6_addr_lst[hash], addr_lst) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09001520 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcano06bfe652008-01-10 22:43:42 -08001521 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001522 if (ipv6_addr_equal(&ifp->addr, addr)) {
1523 if (dev == NULL || ifp->idev->dev == dev)
David S. Miller3e81c6d2010-03-20 16:18:00 -07001524 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001525 }
1526 }
David S. Miller3e81c6d2010-03-20 16:18:00 -07001527 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528}
1529
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001530int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev)
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -04001531{
1532 struct inet6_dev *idev;
1533 struct inet6_ifaddr *ifa;
1534 int onlink;
1535
1536 onlink = 0;
1537 rcu_read_lock();
1538 idev = __in6_dev_get(dev);
1539 if (idev) {
1540 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00001541 list_for_each_entry(ifa, &idev->addr_list, if_list) {
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -04001542 onlink = ipv6_prefix_equal(addr, &ifa->addr,
1543 ifa->prefix_len);
1544 if (onlink)
1545 break;
1546 }
1547 read_unlock_bh(&idev->lock);
1548 }
1549 rcu_read_unlock();
1550 return onlink;
1551}
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -04001552EXPORT_SYMBOL(ipv6_chk_prefix);
1553
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +09001554struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr,
Daniel Lezcano1cab3da2008-01-10 22:44:09 -08001555 struct net_device *dev, int strict)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001556{
David S. Millerb79d1d52010-03-25 21:39:21 -07001557 struct inet6_ifaddr *ifp, *result = NULL;
Eric Dumazetddbe5032012-07-18 08:11:12 +00001558 unsigned int hash = inet6_addr_hash(addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001559
stephen hemminger5c578ae2010-03-17 20:31:11 +00001560 rcu_read_lock_bh();
Sasha Levinb67bfe02013-02-27 17:06:00 -08001561 hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09001562 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcano1cab3da2008-01-10 22:44:09 -08001563 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001564 if (ipv6_addr_equal(&ifp->addr, addr)) {
1565 if (dev == NULL || ifp->idev->dev == dev ||
1566 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
David S. Millerb79d1d52010-03-25 21:39:21 -07001567 result = ifp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001568 in6_ifa_hold(ifp);
1569 break;
1570 }
1571 }
1572 }
stephen hemminger5c578ae2010-03-17 20:31:11 +00001573 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001574
David S. Millerb79d1d52010-03-25 21:39:21 -07001575 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001576}
1577
Linus Torvalds1da177e2005-04-16 15:20:36 -07001578/* Gets referenced address, destroys ifaddr */
1579
Brian Haleycc411d02009-09-09 14:41:32 +00001580static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001581{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001582 if (ifp->flags&IFA_F_PERMANENT) {
1583 spin_lock_bh(&ifp->lock);
1584 addrconf_del_timer(ifp);
1585 ifp->flags |= IFA_F_TENTATIVE;
Brian Haleycc411d02009-09-09 14:41:32 +00001586 if (dad_failed)
1587 ifp->flags |= IFA_F_DADFAILED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001588 spin_unlock_bh(&ifp->lock);
Herbert Xue2577a02010-03-13 12:23:29 -08001589 if (dad_failed)
1590 ipv6_ifa_notify(0, ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001591 in6_ifa_put(ifp);
1592#ifdef CONFIG_IPV6_PRIVACY
1593 } else if (ifp->flags&IFA_F_TEMPORARY) {
1594 struct inet6_ifaddr *ifpub;
1595 spin_lock_bh(&ifp->lock);
1596 ifpub = ifp->ifpub;
1597 if (ifpub) {
1598 in6_ifa_hold(ifpub);
1599 spin_unlock_bh(&ifp->lock);
1600 ipv6_create_tempaddr(ifpub, ifp);
1601 in6_ifa_put(ifpub);
1602 } else {
1603 spin_unlock_bh(&ifp->lock);
1604 }
1605 ipv6_del_addr(ifp);
1606#endif
1607 } else
1608 ipv6_del_addr(ifp);
1609}
1610
Herbert Xuf2344a12010-05-18 15:55:27 -07001611static int addrconf_dad_end(struct inet6_ifaddr *ifp)
1612{
1613 int err = -ENOENT;
1614
1615 spin_lock(&ifp->state_lock);
1616 if (ifp->state == INET6_IFADDR_STATE_DAD) {
1617 ifp->state = INET6_IFADDR_STATE_POSTDAD;
1618 err = 0;
1619 }
1620 spin_unlock(&ifp->state_lock);
1621
1622 return err;
1623}
1624
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09001625void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1626{
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09001627 struct inet6_dev *idev = ifp->idev;
Brian Haley9bdd8d42009-03-18 18:22:48 -07001628
Ursula Braun853dc2e2010-10-24 23:06:43 +00001629 if (addrconf_dad_end(ifp)) {
1630 in6_ifa_put(ifp);
Herbert Xuf2344a12010-05-18 15:55:27 -07001631 return;
Ursula Braun853dc2e2010-10-24 23:06:43 +00001632 }
Herbert Xuf2344a12010-05-18 15:55:27 -07001633
Joe Perchese87cc472012-05-13 21:56:26 +00001634 net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n",
1635 ifp->idev->dev->name, &ifp->addr);
Brian Haley9bdd8d42009-03-18 18:22:48 -07001636
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09001637 if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) {
1638 struct in6_addr addr;
1639
1640 addr.s6_addr32[0] = htonl(0xfe800000);
1641 addr.s6_addr32[1] = 0;
1642
1643 if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) &&
1644 ipv6_addr_equal(&ifp->addr, &addr)) {
1645 /* DAD failed for link-local based on MAC address */
1646 idev->cnf.disable_ipv6 = 1;
Brian Haley9bdd8d42009-03-18 18:22:48 -07001647
Joe Perchesf3213832012-05-15 14:11:53 +00001648 pr_info("%s: IPv6 being disabled!\n",
Brian Haley9bdd8d42009-03-18 18:22:48 -07001649 ifp->idev->dev->name);
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09001650 }
1651 }
1652
Brian Haleycc411d02009-09-09 14:41:32 +00001653 addrconf_dad_stop(ifp, 1);
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09001654}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001655
1656/* Join to solicited addr multicast group. */
1657
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001658void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001659{
1660 struct in6_addr maddr;
1661
1662 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1663 return;
1664
1665 addrconf_addr_solict_mult(addr, &maddr);
1666 ipv6_dev_mc_inc(dev, &maddr);
1667}
1668
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001669void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001670{
1671 struct in6_addr maddr;
1672
1673 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1674 return;
1675
1676 addrconf_addr_solict_mult(addr, &maddr);
1677 __ipv6_dev_mc_dec(idev, &maddr);
1678}
1679
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03001680static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001681{
1682 struct in6_addr addr;
Bjørn Mork2bda8a02011-07-05 23:04:13 +00001683 if (ifp->prefix_len == 127) /* RFC 6164 */
1684 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001685 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1686 if (ipv6_addr_any(&addr))
1687 return;
1688 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1689}
1690
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03001691static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001692{
1693 struct in6_addr addr;
YOSHIFUJI Hideaki32019e62011-07-24 11:44:34 +00001694 if (ifp->prefix_len == 127) /* RFC 6164 */
1695 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001696 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1697 if (ipv6_addr_any(&addr))
1698 return;
1699 __ipv6_dev_ac_dec(ifp->idev, &addr);
1700}
1701
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001702static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1703{
1704 if (dev->addr_len != ETH_ALEN)
1705 return -1;
1706 memcpy(eui, dev->dev_addr, 3);
1707 memcpy(eui + 5, dev->dev_addr + 3, 3);
1708
1709 /*
1710 * The zSeries OSA network cards can be shared among various
1711 * OS instances, but the OSA cards have only one MAC address.
1712 * This leads to duplicate address conflicts in conjunction
1713 * with IPv6 if more than one instance uses the same card.
1714 *
1715 * The driver for these cards can deliver a unique 16-bit
1716 * identifier for each instance sharing the same card. It is
1717 * placed instead of 0xFFFE in the interface identifier. The
1718 * "u" bit of the interface identifier is not inverted in this
1719 * case. Hence the resulting interface identifier has local
1720 * scope according to RFC2373.
1721 */
1722 if (dev->dev_id) {
1723 eui[3] = (dev->dev_id >> 8) & 0xFF;
1724 eui[4] = dev->dev_id & 0xFF;
1725 } else {
1726 eui[3] = 0xFF;
1727 eui[4] = 0xFE;
1728 eui[0] ^= 2;
1729 }
1730 return 0;
1731}
1732
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +00001733static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev)
1734{
1735 if (dev->addr_len != IEEE802154_ADDR_LEN)
1736 return -1;
1737 memcpy(eui, dev->dev_addr, 8);
YOSHIFUJI Hideaki / 吉藤英明5e98a362013-01-28 10:44:29 +00001738 eui[0] ^= 2;
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +00001739 return 0;
1740}
1741
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001742static int addrconf_ifid_ieee1394(u8 *eui, struct net_device *dev)
1743{
1744 union fwnet_hwaddr *ha;
1745
1746 if (dev->addr_len != FWNET_ALEN)
1747 return -1;
1748
1749 ha = (union fwnet_hwaddr *)dev->dev_addr;
1750
1751 memcpy(eui, &ha->uc.uniq_id, sizeof(ha->uc.uniq_id));
1752 eui[0] ^= 2;
1753 return 0;
1754}
1755
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001756static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1757{
1758 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1759 if (dev->addr_len != ARCNET_ALEN)
1760 return -1;
1761 memset(eui, 0, 7);
Eldad Zack8e5e8f32012-04-01 07:49:08 +00001762 eui[7] = *(u8 *)dev->dev_addr;
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001763 return 0;
1764}
1765
1766static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1767{
1768 if (dev->addr_len != INFINIBAND_ALEN)
1769 return -1;
1770 memcpy(eui, dev->dev_addr + 12, 8);
1771 eui[0] |= 2;
1772 return 0;
1773}
1774
stephen hemmingerc61393e2010-10-04 20:17:53 +00001775static int __ipv6_isatap_ifid(u8 *eui, __be32 addr)
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09001776{
Sascha Hlusiak9af28512009-05-19 12:56:51 +00001777 if (addr == 0)
1778 return -1;
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09001779 eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
1780 ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
1781 ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
1782 ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
1783 ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
1784 ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
1785 eui[1] = 0;
1786 eui[2] = 0x5E;
1787 eui[3] = 0xFE;
1788 memcpy(eui + 4, &addr, 4);
1789 return 0;
1790}
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09001791
1792static int addrconf_ifid_sit(u8 *eui, struct net_device *dev)
1793{
1794 if (dev->priv_flags & IFF_ISATAP)
1795 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
1796 return -1;
1797}
1798
stephen hemmingeraee80b52011-06-08 10:44:30 +00001799static int addrconf_ifid_gre(u8 *eui, struct net_device *dev)
1800{
1801 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
1802}
1803
Linus Torvalds1da177e2005-04-16 15:20:36 -07001804static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1805{
1806 switch (dev->type) {
1807 case ARPHRD_ETHER:
1808 case ARPHRD_FDDI:
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001809 return addrconf_ifid_eui48(eui, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001810 case ARPHRD_ARCNET:
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001811 return addrconf_ifid_arcnet(eui, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001812 case ARPHRD_INFINIBAND:
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001813 return addrconf_ifid_infiniband(eui, dev);
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11001814 case ARPHRD_SIT:
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09001815 return addrconf_ifid_sit(eui, dev);
stephen hemmingeraee80b52011-06-08 10:44:30 +00001816 case ARPHRD_IPGRE:
1817 return addrconf_ifid_gre(eui, dev);
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +00001818 case ARPHRD_IEEE802154:
1819 return addrconf_ifid_eui64(eui, dev);
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001820 case ARPHRD_IEEE1394:
1821 return addrconf_ifid_ieee1394(eui, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001822 }
1823 return -1;
1824}
1825
1826static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1827{
1828 int err = -1;
1829 struct inet6_ifaddr *ifp;
1830
1831 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00001832 list_for_each_entry(ifp, &idev->addr_list, if_list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001833 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1834 memcpy(eui, ifp->addr.s6_addr+8, 8);
1835 err = 0;
1836 break;
1837 }
1838 }
1839 read_unlock_bh(&idev->lock);
1840 return err;
1841}
1842
1843#ifdef CONFIG_IPV6_PRIVACY
1844/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00001845static void __ipv6_regen_rndid(struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001846{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001847regen:
YOSHIFUJI Hideaki955189e2006-03-20 16:54:09 -08001848 get_random_bytes(idev->rndid, sizeof(idev->rndid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001849 idev->rndid[0] &= ~0x02;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001850
1851 /*
1852 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1853 * check if generated address is not inappropriate
1854 *
1855 * - Reserved subnet anycast (RFC 2526)
1856 * 11111101 11....11 1xxxxxxx
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11001857 * - ISATAP (RFC4214) 6.1
Linus Torvalds1da177e2005-04-16 15:20:36 -07001858 * 00-00-5E-FE-xx-xx-xx-xx
1859 * - value 0
1860 * - XXX: already assigned to an address on the device
1861 */
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001862 if (idev->rndid[0] == 0xfd &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07001863 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1864 (idev->rndid[7]&0x80))
1865 goto regen;
1866 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1867 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1868 goto regen;
1869 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1870 goto regen;
1871 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001872}
1873
1874static void ipv6_regen_rndid(unsigned long data)
1875{
1876 struct inet6_dev *idev = (struct inet6_dev *) data;
1877 unsigned long expires;
1878
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001879 rcu_read_lock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001880 write_lock_bh(&idev->lock);
1881
1882 if (idev->dead)
1883 goto out;
1884
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00001885 __ipv6_regen_rndid(idev);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001886
Linus Torvalds1da177e2005-04-16 15:20:36 -07001887 expires = jiffies +
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001888 idev->cnf.temp_prefered_lft * HZ -
Ben Hutchings784e2712010-06-26 11:42:55 +00001889 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time -
1890 idev->cnf.max_desync_factor * HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001891 if (time_before(expires, jiffies)) {
Joe Perchesf3213832012-05-15 14:11:53 +00001892 pr_warn("%s: too short regeneration interval; timer disabled for %s\n",
1893 __func__, idev->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001894 goto out;
1895 }
1896
1897 if (!mod_timer(&idev->regen_timer, expires))
1898 in6_dev_hold(idev);
1899
1900out:
1901 write_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001902 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001903 in6_dev_put(idev);
1904}
1905
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00001906static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr)
Eldad Zack8e5e8f32012-04-01 07:49:08 +00001907{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001908 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00001909 __ipv6_regen_rndid(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001910}
1911#endif
1912
1913/*
1914 * Add prefix route.
1915 */
1916
1917static void
1918addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
Jamal Hadi Salime431b8c2005-06-18 22:55:31 -07001919 unsigned long expires, u32 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001920{
Thomas Graf86872cb2006-08-22 00:01:08 -07001921 struct fib6_config cfg = {
1922 .fc_table = RT6_TABLE_PREFIX,
1923 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1924 .fc_ifindex = dev->ifindex,
1925 .fc_expires = expires,
1926 .fc_dst_len = plen,
1927 .fc_flags = RTF_UP | flags,
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001928 .fc_nlinfo.nl_net = dev_net(dev),
Stephen Hemmingerf410a1f2008-08-23 05:16:46 -07001929 .fc_protocol = RTPROT_KERNEL,
Thomas Graf86872cb2006-08-22 00:01:08 -07001930 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001931
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +00001932 cfg.fc_dst = *pfx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001933
1934 /* Prevent useless cloning on PtP SIT.
1935 This thing is done here expecting that the whole
1936 class of non-broadcast devices need not cloning.
1937 */
Amerigo Wang07a93622012-10-29 16:23:10 +00001938#if IS_ENABLED(CONFIG_IPV6_SIT)
Thomas Graf86872cb2006-08-22 00:01:08 -07001939 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1940 cfg.fc_flags |= RTF_NONEXTHOP;
Joerg Roedel0be669b2006-10-10 14:49:53 -07001941#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001942
Thomas Graf86872cb2006-08-22 00:01:08 -07001943 ip6_route_add(&cfg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001944}
1945
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00001946
1947static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx,
1948 int plen,
1949 const struct net_device *dev,
1950 u32 flags, u32 noflags)
1951{
1952 struct fib6_node *fn;
1953 struct rt6_info *rt = NULL;
1954 struct fib6_table *table;
1955
1956 table = fib6_get_table(dev_net(dev), RT6_TABLE_PREFIX);
1957 if (table == NULL)
1958 return NULL;
1959
Li RongQing5744dd92012-09-11 21:59:01 +00001960 read_lock_bh(&table->tb6_lock);
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00001961 fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0);
1962 if (!fn)
1963 goto out;
1964 for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) {
David S. Millerd1918542011-12-28 20:19:20 -05001965 if (rt->dst.dev->ifindex != dev->ifindex)
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00001966 continue;
1967 if ((rt->rt6i_flags & flags) != flags)
1968 continue;
Romain Kuntz85da53b2013-01-09 15:02:26 +01001969 if ((rt->rt6i_flags & noflags) != 0)
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00001970 continue;
1971 dst_hold(&rt->dst);
1972 break;
1973 }
1974out:
Li RongQing5744dd92012-09-11 21:59:01 +00001975 read_unlock_bh(&table->tb6_lock);
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00001976 return rt;
1977}
1978
1979
Linus Torvalds1da177e2005-04-16 15:20:36 -07001980/* Create "default" multicast route to the interface */
1981
1982static void addrconf_add_mroute(struct net_device *dev)
1983{
Thomas Graf86872cb2006-08-22 00:01:08 -07001984 struct fib6_config cfg = {
1985 .fc_table = RT6_TABLE_LOCAL,
1986 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1987 .fc_ifindex = dev->ifindex,
1988 .fc_dst_len = 8,
1989 .fc_flags = RTF_UP,
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001990 .fc_nlinfo.nl_net = dev_net(dev),
Thomas Graf86872cb2006-08-22 00:01:08 -07001991 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001992
Thomas Graf86872cb2006-08-22 00:01:08 -07001993 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1994
1995 ip6_route_add(&cfg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001996}
1997
Amerigo Wang07a93622012-10-29 16:23:10 +00001998#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001999static void sit_route_add(struct net_device *dev)
2000{
Thomas Graf86872cb2006-08-22 00:01:08 -07002001 struct fib6_config cfg = {
2002 .fc_table = RT6_TABLE_MAIN,
2003 .fc_metric = IP6_RT_PRIO_ADDRCONF,
2004 .fc_ifindex = dev->ifindex,
2005 .fc_dst_len = 96,
2006 .fc_flags = RTF_UP | RTF_NONEXTHOP,
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09002007 .fc_nlinfo.nl_net = dev_net(dev),
Thomas Graf86872cb2006-08-22 00:01:08 -07002008 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07002009
2010 /* prefix length - 96 bits "::d.d.d.d" */
Thomas Graf86872cb2006-08-22 00:01:08 -07002011 ip6_route_add(&cfg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002012}
Joerg Roedel0be669b2006-10-10 14:49:53 -07002013#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002014
Linus Torvalds1da177e2005-04-16 15:20:36 -07002015static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
2016{
2017 struct inet6_dev *idev;
2018
2019 ASSERT_RTNL();
2020
Stephen Hemmingere21e8462010-03-20 16:09:01 -07002021 idev = ipv6_find_idev(dev);
2022 if (!idev)
Brian Haley64e724f2010-07-20 10:34:30 +00002023 return ERR_PTR(-ENOBUFS);
2024
2025 if (idev->cnf.disable_ipv6)
2026 return ERR_PTR(-EACCES);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002027
2028 /* Add default multicast route */
Li Wei4af04ab2011-12-06 21:23:45 +00002029 if (!(dev->flags & IFF_LOOPBACK))
2030 addrconf_add_mroute(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002031
Linus Torvalds1da177e2005-04-16 15:20:36 -07002032 return idev;
2033}
2034
Neil Hormane6bff992012-01-04 10:49:15 +00002035void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002036{
2037 struct prefix_info *pinfo;
2038 __u32 valid_lft;
2039 __u32 prefered_lft;
2040 int addr_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002041 struct inet6_dev *in6_dev;
Brian Haley56d417b2009-06-01 03:07:33 -07002042 struct net *net = dev_net(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002043
2044 pinfo = (struct prefix_info *) opt;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002045
Linus Torvalds1da177e2005-04-16 15:20:36 -07002046 if (len < sizeof(struct prefix_info)) {
2047 ADBG(("addrconf: prefix option too short\n"));
2048 return;
2049 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002050
Linus Torvalds1da177e2005-04-16 15:20:36 -07002051 /*
2052 * Validation checks ([ADDRCONF], page 19)
2053 */
2054
2055 addr_type = ipv6_addr_type(&pinfo->prefix);
2056
2057 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
2058 return;
2059
2060 valid_lft = ntohl(pinfo->valid);
2061 prefered_lft = ntohl(pinfo->prefered);
2062
2063 if (prefered_lft > valid_lft) {
Joe Perchese87cc472012-05-13 21:56:26 +00002064 net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002065 return;
2066 }
2067
2068 in6_dev = in6_dev_get(dev);
2069
2070 if (in6_dev == NULL) {
Joe Perchese87cc472012-05-13 21:56:26 +00002071 net_dbg_ratelimited("addrconf: device %s not configured\n",
2072 dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002073 return;
2074 }
2075
2076 /*
2077 * Two things going on here:
2078 * 1) Add routes for on-link prefixes
2079 * 2) Configure prefixes with the auto flag set
2080 */
2081
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002082 if (pinfo->onlink) {
2083 struct rt6_info *rt;
2084 unsigned long rt_expires;
2085
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002086 /* Avoid arithmetic overflow. Really, we could
2087 * save rt_expires in seconds, likely valid_lft,
2088 * but it would require division in fib gc, that it
2089 * not good.
2090 */
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002091 if (HZ > USER_HZ)
2092 rt_expires = addrconf_timeout_fixup(valid_lft, HZ);
2093 else
2094 rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ);
YOSHIFUJI Hideaki3dd4bc62005-12-19 14:02:45 -08002095
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002096 if (addrconf_finite_timeout(rt_expires))
2097 rt_expires *= HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002098
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002099 rt = addrconf_get_prefix_route(&pinfo->prefix,
2100 pinfo->prefix_len,
2101 dev,
2102 RTF_ADDRCONF | RTF_PREFIX_RT,
2103 RTF_GATEWAY | RTF_DEFAULT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002104
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002105 if (rt) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002106 /* Autoconf prefix route */
2107 if (valid_lft == 0) {
2108 ip6_del_rt(rt);
2109 rt = NULL;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002110 } else if (addrconf_finite_timeout(rt_expires)) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002111 /* not infinity */
Gao feng1716a962012-04-06 00:13:10 +00002112 rt6_set_expires(rt, jiffies + rt_expires);
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002113 } else {
Gao feng1716a962012-04-06 00:13:10 +00002114 rt6_clean_expires(rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002115 }
2116 } else if (valid_lft) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002117 clock_t expires = 0;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002118 int flags = RTF_ADDRCONF | RTF_PREFIX_RT;
2119 if (addrconf_finite_timeout(rt_expires)) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002120 /* not infinity */
2121 flags |= RTF_EXPIRES;
2122 expires = jiffies_to_clock_t(rt_expires);
2123 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002124 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002125 dev, expires, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002126 }
Amerigo Wang94e187c2012-10-29 00:13:19 +00002127 ip6_rt_put(rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002128 }
2129
2130 /* Try to figure out our local address for this prefix */
2131
2132 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002133 struct inet6_ifaddr *ifp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002134 struct in6_addr addr;
2135 int create = 0, update_lft = 0;
Daniel Borkmann617fe292013-04-09 03:47:16 +00002136 bool tokenized = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002137
2138 if (pinfo->prefix_len == 64) {
2139 memcpy(&addr, &pinfo->prefix, 8);
Daniel Borkmannf53adae2013-04-08 04:01:30 +00002140
2141 if (!ipv6_addr_any(&in6_dev->token)) {
2142 read_lock_bh(&in6_dev->lock);
2143 memcpy(addr.s6_addr + 8,
2144 in6_dev->token.s6_addr + 8, 8);
2145 read_unlock_bh(&in6_dev->lock);
Daniel Borkmann617fe292013-04-09 03:47:16 +00002146 tokenized = true;
Daniel Borkmannf53adae2013-04-08 04:01:30 +00002147 } else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
2148 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002149 in6_dev_put(in6_dev);
2150 return;
2151 }
2152 goto ok;
2153 }
Joe Perchese87cc472012-05-13 21:56:26 +00002154 net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n",
2155 pinfo->prefix_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002156 in6_dev_put(in6_dev);
2157 return;
2158
2159ok:
2160
YOSHIFUJI Hideaki53b79972008-07-19 22:35:03 -07002161 ifp = ipv6_get_ifaddr(net, &addr, dev, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002162
2163 if (ifp == NULL && valid_lft) {
2164 int max_addresses = in6_dev->cnf.max_addresses;
Neil Horman95c385b2007-04-25 17:08:10 -07002165 u32 addr_flags = 0;
2166
2167#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2168 if (in6_dev->cnf.optimistic_dad &&
Neil Hormane6bff992012-01-04 10:49:15 +00002169 !net->ipv6.devconf_all->forwarding && sllao)
Neil Horman95c385b2007-04-25 17:08:10 -07002170 addr_flags = IFA_F_OPTIMISTIC;
2171#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002172
2173 /* Do not allow to create too much of autoconfigured
2174 * addresses; this would be too easy way to crash kernel.
2175 */
2176 if (!max_addresses ||
2177 ipv6_count_addresses(in6_dev) < max_addresses)
2178 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
Neil Horman95c385b2007-04-25 17:08:10 -07002179 addr_type&IPV6_ADDR_SCOPE_MASK,
2180 addr_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002181
YOSHIFUJI Hideaki / 吉藤英明3f0d2ba2013-01-22 06:32:54 +00002182 if (IS_ERR_OR_NULL(ifp)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002183 in6_dev_put(in6_dev);
2184 return;
2185 }
2186
2187 update_lft = create = 1;
2188 ifp->cstamp = jiffies;
Daniel Borkmann617fe292013-04-09 03:47:16 +00002189 ifp->tokenized = tokenized;
David S. Millercf22f9a2012-04-14 21:37:40 -04002190 addrconf_dad_start(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002191 }
2192
2193 if (ifp) {
2194 int flags;
2195 unsigned long now;
2196#ifdef CONFIG_IPV6_PRIVACY
2197 struct inet6_ifaddr *ift;
2198#endif
2199 u32 stored_lft;
2200
2201 /* update lifetime (RFC2462 5.5.3 e) */
2202 spin_lock(&ifp->lock);
2203 now = jiffies;
2204 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
2205 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
2206 else
2207 stored_lft = 0;
2208 if (!update_lft && stored_lft) {
2209 if (valid_lft > MIN_VALID_LIFETIME ||
2210 valid_lft > stored_lft)
2211 update_lft = 1;
2212 else if (stored_lft <= MIN_VALID_LIFETIME) {
2213 /* valid_lft <= stored_lft is always true */
Brian Haleya1ed0522009-07-02 07:10:52 +00002214 /*
2215 * RFC 4862 Section 5.5.3e:
2216 * "Note that the preferred lifetime of
2217 * the corresponding address is always
2218 * reset to the Preferred Lifetime in
2219 * the received Prefix Information
2220 * option, regardless of whether the
2221 * valid lifetime is also reset or
2222 * ignored."
2223 *
2224 * So if the preferred lifetime in
2225 * this advertisement is different
2226 * than what we have stored, but the
2227 * valid lifetime is invalid, just
2228 * reset prefered_lft.
2229 *
2230 * We must set the valid lifetime
2231 * to the stored lifetime since we'll
2232 * be updating the timestamp below,
2233 * else we'll set it back to the
Lucas De Marchi25985ed2011-03-30 22:57:33 -03002234 * minimum.
Brian Haleya1ed0522009-07-02 07:10:52 +00002235 */
2236 if (prefered_lft != ifp->prefered_lft) {
2237 valid_lft = stored_lft;
2238 update_lft = 1;
2239 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002240 } else {
2241 valid_lft = MIN_VALID_LIFETIME;
2242 if (valid_lft < prefered_lft)
2243 prefered_lft = valid_lft;
2244 update_lft = 1;
2245 }
2246 }
2247
2248 if (update_lft) {
2249 ifp->valid_lft = valid_lft;
2250 ifp->prefered_lft = prefered_lft;
2251 ifp->tstamp = now;
2252 flags = ifp->flags;
2253 ifp->flags &= ~IFA_F_DEPRECATED;
2254 spin_unlock(&ifp->lock);
2255
2256 if (!(flags&IFA_F_TENTATIVE))
2257 ipv6_ifa_notify(0, ifp);
2258 } else
2259 spin_unlock(&ifp->lock);
2260
2261#ifdef CONFIG_IPV6_PRIVACY
2262 read_lock_bh(&in6_dev->lock);
2263 /* update all temporary addresses in the list */
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00002264 list_for_each_entry(ift, &in6_dev->tempaddr_list,
2265 tmp_list) {
2266 int age, max_valid, max_prefered;
2267
Benoit Boissinotc6fbfac2008-04-02 00:00:58 -07002268 if (ifp != ift->ifpub)
2269 continue;
2270
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00002271 /*
2272 * RFC 4941 section 3.3:
2273 * If a received option will extend the lifetime
2274 * of a public address, the lifetimes of
2275 * temporary addresses should be extended,
2276 * subject to the overall constraint that no
2277 * temporary addresses should ever remain
2278 * "valid" or "preferred" for a time longer than
2279 * (TEMP_VALID_LIFETIME) or
2280 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR),
2281 * respectively.
2282 */
2283 age = (now - ift->cstamp) / HZ;
2284 max_valid = in6_dev->cnf.temp_valid_lft - age;
2285 if (max_valid < 0)
2286 max_valid = 0;
2287
2288 max_prefered = in6_dev->cnf.temp_prefered_lft -
2289 in6_dev->cnf.max_desync_factor -
2290 age;
2291 if (max_prefered < 0)
2292 max_prefered = 0;
2293
2294 if (valid_lft > max_valid)
2295 valid_lft = max_valid;
2296
2297 if (prefered_lft > max_prefered)
2298 prefered_lft = max_prefered;
2299
Linus Torvalds1da177e2005-04-16 15:20:36 -07002300 spin_lock(&ift->lock);
2301 flags = ift->flags;
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00002302 ift->valid_lft = valid_lft;
2303 ift->prefered_lft = prefered_lft;
2304 ift->tstamp = now;
2305 if (prefered_lft > 0)
2306 ift->flags &= ~IFA_F_DEPRECATED;
2307
Linus Torvalds1da177e2005-04-16 15:20:36 -07002308 spin_unlock(&ift->lock);
2309 if (!(flags&IFA_F_TENTATIVE))
2310 ipv6_ifa_notify(0, ift);
2311 }
2312
Glenn Wursteraed65502010-09-27 07:04:30 +00002313 if ((create || list_empty(&in6_dev->tempaddr_list)) && in6_dev->cnf.use_tempaddr > 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002314 /*
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00002315 * When a new public address is created as
2316 * described in [ADDRCONF], also create a new
2317 * temporary address. Also create a temporary
2318 * address if it's enabled but no temporary
2319 * address currently exists.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002320 */
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002321 read_unlock_bh(&in6_dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002322 ipv6_create_tempaddr(ifp, NULL);
2323 } else {
2324 read_unlock_bh(&in6_dev->lock);
2325 }
2326#endif
2327 in6_ifa_put(ifp);
2328 addrconf_verify(0);
2329 }
2330 }
2331 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
2332 in6_dev_put(in6_dev);
2333}
2334
2335/*
2336 * Set destination address.
2337 * Special case for SIT interfaces where we create a new "virtual"
2338 * device.
2339 */
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002340int addrconf_set_dstaddr(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002341{
2342 struct in6_ifreq ireq;
2343 struct net_device *dev;
2344 int err = -EINVAL;
2345
2346 rtnl_lock();
2347
2348 err = -EFAULT;
2349 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2350 goto err_exit;
2351
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002352 dev = __dev_get_by_index(net, ireq.ifr6_ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002353
2354 err = -ENODEV;
2355 if (dev == NULL)
2356 goto err_exit;
2357
Amerigo Wang07a93622012-10-29 16:23:10 +00002358#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002359 if (dev->type == ARPHRD_SIT) {
Stephen Hemminger5bc3eb72008-11-19 21:52:05 -08002360 const struct net_device_ops *ops = dev->netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002361 struct ifreq ifr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002362 struct ip_tunnel_parm p;
2363
2364 err = -EADDRNOTAVAIL;
2365 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
2366 goto err_exit;
2367
2368 memset(&p, 0, sizeof(p));
2369 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
2370 p.iph.saddr = 0;
2371 p.iph.version = 4;
2372 p.iph.ihl = 5;
2373 p.iph.protocol = IPPROTO_IPV6;
2374 p.iph.ttl = 64;
Stephen Hemmingerd20b3102008-01-21 00:48:43 -08002375 ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002376
Stephen Hemminger5bc3eb72008-11-19 21:52:05 -08002377 if (ops->ndo_do_ioctl) {
2378 mm_segment_t oldfs = get_fs();
2379
2380 set_fs(KERNEL_DS);
2381 err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL);
2382 set_fs(oldfs);
2383 } else
2384 err = -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002385
2386 if (err == 0) {
2387 err = -ENOBUFS;
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002388 dev = __dev_get_by_name(net, p.name);
2389 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002390 goto err_exit;
2391 err = dev_open(dev);
2392 }
2393 }
Joerg Roedel0be669b2006-10-10 14:49:53 -07002394#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002395
2396err_exit:
2397 rtnl_unlock();
2398 return err;
2399}
2400
2401/*
2402 * Manual configuration of address on an interface
2403 */
Eric Dumazetb71d1d42011-04-22 04:53:02 +00002404static int inet6_addr_add(struct net *net, int ifindex, const struct in6_addr *pfx,
Thomas Graf24ef0da2008-05-28 16:54:22 +02002405 unsigned int plen, __u8 ifa_flags, __u32 prefered_lft,
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002406 __u32 valid_lft)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002407{
2408 struct inet6_ifaddr *ifp;
2409 struct inet6_dev *idev;
2410 struct net_device *dev;
2411 int scope;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002412 u32 flags;
2413 clock_t expires;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002414 unsigned long timeout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002415
2416 ASSERT_RTNL();
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002417
Thomas Graf24ef0da2008-05-28 16:54:22 +02002418 if (plen > 128)
2419 return -EINVAL;
2420
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002421 /* check the lifetime */
2422 if (!valid_lft || prefered_lft > valid_lft)
2423 return -EINVAL;
2424
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002425 dev = __dev_get_by_index(net, ifindex);
2426 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002427 return -ENODEV;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002428
Brian Haley64e724f2010-07-20 10:34:30 +00002429 idev = addrconf_add_dev(dev);
2430 if (IS_ERR(idev))
2431 return PTR_ERR(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002432
2433 scope = ipv6_addr_scope(pfx);
2434
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002435 timeout = addrconf_timeout_fixup(valid_lft, HZ);
2436 if (addrconf_finite_timeout(timeout)) {
2437 expires = jiffies_to_clock_t(timeout * HZ);
2438 valid_lft = timeout;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002439 flags = RTF_EXPIRES;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002440 } else {
2441 expires = 0;
2442 flags = 0;
2443 ifa_flags |= IFA_F_PERMANENT;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002444 }
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002445
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002446 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
2447 if (addrconf_finite_timeout(timeout)) {
2448 if (timeout == 0)
2449 ifa_flags |= IFA_F_DEPRECATED;
2450 prefered_lft = timeout;
2451 }
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002452
2453 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
2454
Linus Torvalds1da177e2005-04-16 15:20:36 -07002455 if (!IS_ERR(ifp)) {
Herbert Xu06aebfb2006-08-09 16:52:04 -07002456 spin_lock_bh(&ifp->lock);
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002457 ifp->valid_lft = valid_lft;
2458 ifp->prefered_lft = prefered_lft;
2459 ifp->tstamp = jiffies;
Herbert Xu06aebfb2006-08-09 16:52:04 -07002460 spin_unlock_bh(&ifp->lock);
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002461
YOSHIFUJI Hideaki46d48042007-02-07 20:36:26 +09002462 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002463 expires, flags);
Neil Horman95c385b2007-04-25 17:08:10 -07002464 /*
2465 * Note that section 3.1 of RFC 4429 indicates
2466 * that the Optimistic flag should not be set for
2467 * manually configured addresses
2468 */
David S. Millercf22f9a2012-04-14 21:37:40 -04002469 addrconf_dad_start(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002470 in6_ifa_put(ifp);
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002471 addrconf_verify(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002472 return 0;
2473 }
2474
2475 return PTR_ERR(ifp);
2476}
2477
Eric Dumazetb71d1d42011-04-22 04:53:02 +00002478static int inet6_addr_del(struct net *net, int ifindex, const struct in6_addr *pfx,
Thomas Graf24ef0da2008-05-28 16:54:22 +02002479 unsigned int plen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002480{
2481 struct inet6_ifaddr *ifp;
2482 struct inet6_dev *idev;
2483 struct net_device *dev;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002484
Thomas Graf24ef0da2008-05-28 16:54:22 +02002485 if (plen > 128)
2486 return -EINVAL;
2487
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002488 dev = __dev_get_by_index(net, ifindex);
2489 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002490 return -ENODEV;
2491
2492 if ((idev = __in6_dev_get(dev)) == NULL)
2493 return -ENXIO;
2494
2495 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00002496 list_for_each_entry(ifp, &idev->addr_list, if_list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002497 if (ifp->prefix_len == plen &&
2498 ipv6_addr_equal(pfx, &ifp->addr)) {
2499 in6_ifa_hold(ifp);
2500 read_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002501
Linus Torvalds1da177e2005-04-16 15:20:36 -07002502 ipv6_del_addr(ifp);
2503
2504 /* If the last address is deleted administratively,
2505 disable IPv6 on this interface.
2506 */
stephen hemminger502a2ff2010-03-17 20:31:13 +00002507 if (list_empty(&idev->addr_list))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002508 addrconf_ifdown(idev->dev, 1);
2509 return 0;
2510 }
2511 }
2512 read_unlock_bh(&idev->lock);
2513 return -EADDRNOTAVAIL;
2514}
2515
2516
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002517int addrconf_add_ifaddr(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002518{
2519 struct in6_ifreq ireq;
2520 int err;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002521
Eric W. Biedermanaf31f412012-11-16 03:03:06 +00002522 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002523 return -EPERM;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002524
Linus Torvalds1da177e2005-04-16 15:20:36 -07002525 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2526 return -EFAULT;
2527
2528 rtnl_lock();
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002529 err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2530 ireq.ifr6_prefixlen, IFA_F_PERMANENT,
2531 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002532 rtnl_unlock();
2533 return err;
2534}
2535
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002536int addrconf_del_ifaddr(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002537{
2538 struct in6_ifreq ireq;
2539 int err;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002540
Eric W. Biedermanaf31f412012-11-16 03:03:06 +00002541 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002542 return -EPERM;
2543
2544 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2545 return -EFAULT;
2546
2547 rtnl_lock();
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002548 err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2549 ireq.ifr6_prefixlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002550 rtnl_unlock();
2551 return err;
2552}
2553
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002554static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
2555 int plen, int scope)
2556{
2557 struct inet6_ifaddr *ifp;
2558
2559 ifp = ipv6_add_addr(idev, addr, plen, scope, IFA_F_PERMANENT);
2560 if (!IS_ERR(ifp)) {
2561 spin_lock_bh(&ifp->lock);
2562 ifp->flags &= ~IFA_F_TENTATIVE;
2563 spin_unlock_bh(&ifp->lock);
2564 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2565 in6_ifa_put(ifp);
2566 }
2567}
2568
Amerigo Wang07a93622012-10-29 16:23:10 +00002569#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002570static void sit_add_v4_addrs(struct inet6_dev *idev)
2571{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002572 struct in6_addr addr;
2573 struct net_device *dev;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09002574 struct net *net = dev_net(idev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002575 int scope;
2576
2577 ASSERT_RTNL();
2578
2579 memset(&addr, 0, sizeof(struct in6_addr));
2580 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2581
2582 if (idev->dev->flags&IFF_POINTOPOINT) {
2583 addr.s6_addr32[0] = htonl(0xfe800000);
2584 scope = IFA_LINK;
2585 } else {
2586 scope = IPV6_ADDR_COMPATv4;
2587 }
2588
2589 if (addr.s6_addr32[3]) {
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002590 add_addr(idev, &addr, 128, scope);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002591 return;
2592 }
2593
Benjamin Thery6fda7352008-03-05 10:47:47 -08002594 for_each_netdev(net, dev) {
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002595 struct in_device *in_dev = __in_dev_get_rtnl(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002596 if (in_dev && (dev->flags & IFF_UP)) {
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002597 struct in_ifaddr *ifa;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002598
2599 int flag = scope;
2600
2601 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2602 int plen;
2603
2604 addr.s6_addr32[3] = ifa->ifa_local;
2605
2606 if (ifa->ifa_scope == RT_SCOPE_LINK)
2607 continue;
2608 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2609 if (idev->dev->flags&IFF_POINTOPOINT)
2610 continue;
2611 flag |= IFA_HOST;
2612 }
2613 if (idev->dev->flags&IFF_POINTOPOINT)
2614 plen = 64;
2615 else
2616 plen = 96;
2617
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002618 add_addr(idev, &addr, plen, flag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002619 }
2620 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002621 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002622}
Joerg Roedel0be669b2006-10-10 14:49:53 -07002623#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002624
2625static void init_loopback(struct net_device *dev)
2626{
2627 struct inet6_dev *idev;
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05302628 struct net_device *sp_dev;
2629 struct inet6_ifaddr *sp_ifa;
2630 struct rt6_info *sp_rt;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002631
2632 /* ::1 */
2633
2634 ASSERT_RTNL();
2635
2636 if ((idev = ipv6_find_idev(dev)) == NULL) {
Joe Perches91df42b2012-05-15 14:11:54 +00002637 pr_debug("%s: add_dev failed\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002638 return;
2639 }
2640
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002641 add_addr(idev, &in6addr_loopback, 128, IFA_HOST);
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05302642
2643 /* Add routes to other interface's IPv6 addresses */
2644 for_each_netdev(dev_net(dev), sp_dev) {
2645 if (!strcmp(sp_dev->name, dev->name))
2646 continue;
2647
2648 idev = __in6_dev_get(sp_dev);
2649 if (!idev)
2650 continue;
2651
2652 read_lock_bh(&idev->lock);
2653 list_for_each_entry(sp_ifa, &idev->addr_list, if_list) {
2654
2655 if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE))
2656 continue;
2657
2658 sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, 0);
2659
2660 /* Failure cases are ignored */
2661 if (!IS_ERR(sp_rt))
2662 ip6_ins_rt(sp_rt);
2663 }
2664 read_unlock_bh(&idev->lock);
2665 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002666}
2667
Eric Dumazetb71d1d42011-04-22 04:53:02 +00002668static void addrconf_add_linklocal(struct inet6_dev *idev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002669{
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002670 struct inet6_ifaddr *ifp;
Neil Horman95c385b2007-04-25 17:08:10 -07002671 u32 addr_flags = IFA_F_PERMANENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002672
Neil Horman95c385b2007-04-25 17:08:10 -07002673#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2674 if (idev->cnf.optimistic_dad &&
David Miller702beb82008-07-20 18:17:02 -07002675 !dev_net(idev->dev)->ipv6.devconf_all->forwarding)
Neil Horman95c385b2007-04-25 17:08:10 -07002676 addr_flags |= IFA_F_OPTIMISTIC;
2677#endif
2678
2679
2680 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002681 if (!IS_ERR(ifp)) {
YOSHIFUJI Hideaki46d48042007-02-07 20:36:26 +09002682 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
David S. Millercf22f9a2012-04-14 21:37:40 -04002683 addrconf_dad_start(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002684 in6_ifa_put(ifp);
2685 }
2686}
2687
2688static void addrconf_dev_config(struct net_device *dev)
2689{
2690 struct in6_addr addr;
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002691 struct inet6_dev *idev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002692
2693 ASSERT_RTNL();
2694
Herbert Xu74235a22007-06-14 13:02:55 -07002695 if ((dev->type != ARPHRD_ETHER) &&
2696 (dev->type != ARPHRD_FDDI) &&
Herbert Xu74235a22007-06-14 13:02:55 -07002697 (dev->type != ARPHRD_ARCNET) &&
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +00002698 (dev->type != ARPHRD_INFINIBAND) &&
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00002699 (dev->type != ARPHRD_IEEE802154) &&
2700 (dev->type != ARPHRD_IEEE1394)) {
Herbert Xu74235a22007-06-14 13:02:55 -07002701 /* Alas, we support only Ethernet autoconfiguration. */
2702 return;
2703 }
2704
Linus Torvalds1da177e2005-04-16 15:20:36 -07002705 idev = addrconf_add_dev(dev);
Brian Haley64e724f2010-07-20 10:34:30 +00002706 if (IS_ERR(idev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002707 return;
2708
2709 memset(&addr, 0, sizeof(struct in6_addr));
2710 addr.s6_addr32[0] = htonl(0xFE800000);
2711
2712 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2713 addrconf_add_linklocal(idev, &addr);
2714}
2715
Amerigo Wang07a93622012-10-29 16:23:10 +00002716#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002717static void addrconf_sit_config(struct net_device *dev)
2718{
2719 struct inet6_dev *idev;
2720
2721 ASSERT_RTNL();
2722
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002723 /*
2724 * Configure the tunnel with one of our IPv4
2725 * addresses... we should configure all of
Linus Torvalds1da177e2005-04-16 15:20:36 -07002726 * our v4 addrs in the tunnel
2727 */
2728
2729 if ((idev = ipv6_find_idev(dev)) == NULL) {
Joe Perches91df42b2012-05-15 14:11:54 +00002730 pr_debug("%s: add_dev failed\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002731 return;
2732 }
2733
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11002734 if (dev->priv_flags & IFF_ISATAP) {
2735 struct in6_addr addr;
2736
2737 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
2738 addrconf_prefix_route(&addr, 64, dev, 0, 0);
2739 if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
2740 addrconf_add_linklocal(idev, &addr);
2741 return;
2742 }
2743
Linus Torvalds1da177e2005-04-16 15:20:36 -07002744 sit_add_v4_addrs(idev);
2745
Nicolas Dichtel62b54dd2012-10-01 23:19:14 +00002746 if (dev->flags&IFF_POINTOPOINT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002747 addrconf_add_mroute(dev);
Nicolas Dichtel62b54dd2012-10-01 23:19:14 +00002748 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07002749 sit_route_add(dev);
2750}
Joerg Roedel0be669b2006-10-10 14:49:53 -07002751#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002752
Amerigo Wang07a93622012-10-29 16:23:10 +00002753#if IS_ENABLED(CONFIG_NET_IPGRE)
stephen hemmingeraee80b52011-06-08 10:44:30 +00002754static void addrconf_gre_config(struct net_device *dev)
2755{
2756 struct inet6_dev *idev;
2757 struct in6_addr addr;
2758
Joe Perchesf3213832012-05-15 14:11:53 +00002759 pr_info("%s(%s)\n", __func__, dev->name);
stephen hemmingeraee80b52011-06-08 10:44:30 +00002760
2761 ASSERT_RTNL();
2762
2763 if ((idev = ipv6_find_idev(dev)) == NULL) {
Joe Perches91df42b2012-05-15 14:11:54 +00002764 pr_debug("%s: add_dev failed\n", __func__);
stephen hemmingeraee80b52011-06-08 10:44:30 +00002765 return;
2766 }
2767
2768 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
2769 addrconf_prefix_route(&addr, 64, dev, 0, 0);
2770
2771 if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
2772 addrconf_add_linklocal(idev, &addr);
2773}
2774#endif
2775
Linus Torvalds1da177e2005-04-16 15:20:36 -07002776static inline int
2777ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2778{
2779 struct in6_addr lladdr;
2780
Neil Horman95c385b2007-04-25 17:08:10 -07002781 if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002782 addrconf_add_linklocal(idev, &lladdr);
2783 return 0;
2784 }
2785 return -1;
2786}
2787
2788static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2789{
2790 struct net_device *link_dev;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09002791 struct net *net = dev_net(idev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002792
2793 /* first try to inherit the link-local address from the link device */
2794 if (idev->dev->iflink &&
Benjamin Thery6fda7352008-03-05 10:47:47 -08002795 (link_dev = __dev_get_by_index(net, idev->dev->iflink))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002796 if (!ipv6_inherit_linklocal(idev, link_dev))
2797 return;
2798 }
2799 /* then try to inherit it from any device */
Benjamin Thery6fda7352008-03-05 10:47:47 -08002800 for_each_netdev(net, link_dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002801 if (!ipv6_inherit_linklocal(idev, link_dev))
2802 return;
2803 }
Joe Perches91df42b2012-05-15 14:11:54 +00002804 pr_debug("init ip6-ip6: add_linklocal failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002805}
2806
2807/*
2808 * Autoconfigure tunnel with a link-local address so routing protocols,
2809 * DHCPv6, MLD etc. can be run over the virtual link
2810 */
2811
2812static void addrconf_ip6_tnl_config(struct net_device *dev)
2813{
2814 struct inet6_dev *idev;
2815
2816 ASSERT_RTNL();
2817
Stephen Hemmingere21e8462010-03-20 16:09:01 -07002818 idev = addrconf_add_dev(dev);
Brian Haley64e724f2010-07-20 10:34:30 +00002819 if (IS_ERR(idev)) {
Joe Perches91df42b2012-05-15 14:11:54 +00002820 pr_debug("init ip6-ip6: add_dev failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002821 return;
2822 }
2823 ip6_tnl_add_linklocal(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002824}
2825
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002826static int addrconf_notify(struct notifier_block *this, unsigned long event,
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002827 void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002828{
2829 struct net_device *dev = (struct net_device *) data;
Eric Dumazet748e2d92012-08-22 21:50:59 +00002830 struct inet6_dev *idev = __in6_dev_get(dev);
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09002831 int run_pending = 0;
Herbert Xub217d612007-07-30 17:04:52 -07002832 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002833
Stephen Hemmingere21e8462010-03-20 16:09:01 -07002834 switch (event) {
YOSHIFUJI Hideaki45ba9dd2007-02-15 02:07:27 +09002835 case NETDEV_REGISTER:
Herbert Xu74235a22007-06-14 13:02:55 -07002836 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
YOSHIFUJI Hideaki45ba9dd2007-02-15 02:07:27 +09002837 idev = ipv6_add_dev(dev);
2838 if (!idev)
Herbert Xub217d612007-07-30 17:04:52 -07002839 return notifier_from_errno(-ENOMEM);
YOSHIFUJI Hideaki45ba9dd2007-02-15 02:07:27 +09002840 }
2841 break;
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002842
Linus Torvalds1da177e2005-04-16 15:20:36 -07002843 case NETDEV_UP:
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002844 case NETDEV_CHANGE:
Jay Vosburghc2edacf2007-07-09 10:42:47 -07002845 if (dev->flags & IFF_SLAVE)
2846 break;
2847
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002848 if (event == NETDEV_UP) {
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -07002849 if (!addrconf_qdisc_ok(dev)) {
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002850 /* device is not ready yet. */
Joe Perchesf3213832012-05-15 14:11:53 +00002851 pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n",
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002852 dev->name);
2853 break;
2854 }
Kristian Slavov99081042006-02-08 16:10:53 -08002855
Evgeniy Polyakovd31c7b82007-11-30 23:36:08 +11002856 if (!idev && dev->mtu >= IPV6_MIN_MTU)
2857 idev = ipv6_add_dev(dev);
2858
Benjamin Therye3ec6cf2008-11-05 01:43:57 -08002859 if (idev) {
Kristian Slavov99081042006-02-08 16:10:53 -08002860 idev->if_flags |= IF_READY;
Benjamin Therye3ec6cf2008-11-05 01:43:57 -08002861 run_pending = 1;
2862 }
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002863 } else {
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -07002864 if (!addrconf_qdisc_ok(dev)) {
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002865 /* device is still not ready. */
2866 break;
2867 }
2868
2869 if (idev) {
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002870 if (idev->if_flags & IF_READY)
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002871 /* device is already configured. */
2872 break;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002873 idev->if_flags |= IF_READY;
2874 }
2875
Joe Perchesf3213832012-05-15 14:11:53 +00002876 pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n",
2877 dev->name);
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002878
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09002879 run_pending = 1;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002880 }
2881
Stephen Hemmingere21e8462010-03-20 16:09:01 -07002882 switch (dev->type) {
Amerigo Wang07a93622012-10-29 16:23:10 +00002883#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002884 case ARPHRD_SIT:
2885 addrconf_sit_config(dev);
2886 break;
Joerg Roedel0be669b2006-10-10 14:49:53 -07002887#endif
Amerigo Wang07a93622012-10-29 16:23:10 +00002888#if IS_ENABLED(CONFIG_NET_IPGRE)
stephen hemmingeraee80b52011-06-08 10:44:30 +00002889 case ARPHRD_IPGRE:
2890 addrconf_gre_config(dev);
2891 break;
2892#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002893 case ARPHRD_TUNNEL6:
2894 addrconf_ip6_tnl_config(dev);
2895 break;
2896 case ARPHRD_LOOPBACK:
2897 init_loopback(dev);
2898 break;
2899
2900 default:
2901 addrconf_dev_config(dev);
2902 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07002903 }
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002904
Linus Torvalds1da177e2005-04-16 15:20:36 -07002905 if (idev) {
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09002906 if (run_pending)
2907 addrconf_dad_run(idev);
2908
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002909 /*
2910 * If the MTU changed during the interface down,
2911 * when the interface up, the changed MTU must be
2912 * reflected in the idev as well as routers.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002913 */
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002914 if (idev->cnf.mtu6 != dev->mtu &&
2915 dev->mtu >= IPV6_MIN_MTU) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002916 rt6_mtu_change(dev, dev->mtu);
2917 idev->cnf.mtu6 = dev->mtu;
2918 }
2919 idev->tstamp = jiffies;
2920 inet6_ifinfo_notify(RTM_NEWLINK, idev);
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002921
2922 /*
2923 * If the changed mtu during down is lower than
2924 * IPV6_MIN_MTU stop IPv6 on this interface.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002925 */
2926 if (dev->mtu < IPV6_MIN_MTU)
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002927 addrconf_ifdown(dev, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002928 }
2929 break;
2930
2931 case NETDEV_CHANGEMTU:
Evgeniy Polyakovd31c7b82007-11-30 23:36:08 +11002932 if (idev && dev->mtu >= IPV6_MIN_MTU) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002933 rt6_mtu_change(dev, dev->mtu);
2934 idev->cnf.mtu6 = dev->mtu;
2935 break;
2936 }
2937
Evgeniy Polyakovd31c7b82007-11-30 23:36:08 +11002938 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2939 idev = ipv6_add_dev(dev);
2940 if (idev)
2941 break;
2942 }
2943
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002944 /*
2945 * MTU falled under IPV6_MIN_MTU.
2946 * Stop IPv6 on this interface.
2947 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002948
2949 case NETDEV_DOWN:
2950 case NETDEV_UNREGISTER:
2951 /*
2952 * Remove all addresses from this interface.
2953 */
2954 addrconf_ifdown(dev, event != NETDEV_DOWN);
2955 break;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002956
Linus Torvalds1da177e2005-04-16 15:20:36 -07002957 case NETDEV_CHANGENAME:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002958 if (idev) {
Stephen Hemminger5632c512007-04-28 21:16:39 -07002959 snmp6_unregister_dev(idev);
Pavel Emelyanov408c4762008-01-10 17:41:21 -08002960 addrconf_sysctl_unregister(idev);
Pavel Emelyanovf52295a2007-12-02 00:58:37 +11002961 addrconf_sysctl_register(idev);
Herbert Xub217d612007-07-30 17:04:52 -07002962 err = snmp6_register_dev(idev);
2963 if (err)
2964 return notifier_from_errno(err);
Stephen Hemminger5632c512007-04-28 21:16:39 -07002965 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002966 break;
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002967
Jiri Pirko93d9b7d2010-03-10 10:28:56 +00002968 case NETDEV_PRE_TYPE_CHANGE:
2969 case NETDEV_POST_TYPE_CHANGE:
2970 addrconf_type_change(dev, event);
Moni Shoua75c78502009-09-15 02:37:40 -07002971 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07002972 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002973
2974 return NOTIFY_OK;
2975}
2976
2977/*
2978 * addrconf module should be notified of a device going up
2979 */
2980static struct notifier_block ipv6_dev_notf = {
2981 .notifier_call = addrconf_notify,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002982};
2983
Jiri Pirko93d9b7d2010-03-10 10:28:56 +00002984static void addrconf_type_change(struct net_device *dev, unsigned long event)
Moni Shoua75c78502009-09-15 02:37:40 -07002985{
2986 struct inet6_dev *idev;
2987 ASSERT_RTNL();
2988
2989 idev = __in6_dev_get(dev);
2990
Jiri Pirko93d9b7d2010-03-10 10:28:56 +00002991 if (event == NETDEV_POST_TYPE_CHANGE)
Moni Shoua75c78502009-09-15 02:37:40 -07002992 ipv6_mc_remap(idev);
Jiri Pirko93d9b7d2010-03-10 10:28:56 +00002993 else if (event == NETDEV_PRE_TYPE_CHANGE)
Moni Shoua75c78502009-09-15 02:37:40 -07002994 ipv6_mc_unmap(idev);
2995}
2996
Linus Torvalds1da177e2005-04-16 15:20:36 -07002997static int addrconf_ifdown(struct net_device *dev, int how)
2998{
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09002999 struct net *net = dev_net(dev);
stephen hemminger502a2ff2010-03-17 20:31:13 +00003000 struct inet6_dev *idev;
3001 struct inet6_ifaddr *ifa;
David S. Miller73a8bd72011-01-23 23:27:15 -08003002 int state, i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003003
3004 ASSERT_RTNL();
3005
David S. Miller73a8bd72011-01-23 23:27:15 -08003006 rt6_ifdown(net, dev);
3007 neigh_ifdown(&nd_tbl, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003008
3009 idev = __in6_dev_get(dev);
3010 if (idev == NULL)
3011 return -ENODEV;
3012
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003013 /*
3014 * Step 1: remove reference to ipv6 device from parent device.
3015 * Do not dev_put!
Linus Torvalds1da177e2005-04-16 15:20:36 -07003016 */
Denis V. Lunev439e2382008-04-03 13:30:17 -07003017 if (how) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003018 idev->dead = 1;
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07003019
3020 /* protected by rtnl_lock */
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +00003021 RCU_INIT_POINTER(dev->ip6_ptr, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003022
3023 /* Step 1.5: remove snmp6 entry */
3024 snmp6_unregister_dev(idev);
3025
3026 }
3027
David S. Miller73a8bd72011-01-23 23:27:15 -08003028 /* Step 2: clear hash table */
3029 for (i = 0; i < IN6_ADDR_HSIZE; i++) {
3030 struct hlist_head *h = &inet6_addr_lst[i];
David S. Miller73a8bd72011-01-23 23:27:15 -08003031
3032 spin_lock_bh(&addrconf_hash_lock);
3033 restart:
Sasha Levinb67bfe02013-02-27 17:06:00 -08003034 hlist_for_each_entry_rcu(ifa, h, addr_lst) {
David S. Miller73a8bd72011-01-23 23:27:15 -08003035 if (ifa->idev == idev) {
3036 hlist_del_init_rcu(&ifa->addr_lst);
3037 addrconf_del_timer(ifa);
3038 goto restart;
3039 }
3040 }
3041 spin_unlock_bh(&addrconf_hash_lock);
3042 }
3043
Linus Torvalds1da177e2005-04-16 15:20:36 -07003044 write_lock_bh(&idev->lock);
3045
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003046 /* Step 2: clear flags for stateless addrconf */
Denis V. Lunev439e2382008-04-03 13:30:17 -07003047 if (!how)
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003048 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003049
Linus Torvalds1da177e2005-04-16 15:20:36 -07003050#ifdef CONFIG_IPV6_PRIVACY
Denis V. Lunev439e2382008-04-03 13:30:17 -07003051 if (how && del_timer(&idev->regen_timer))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003052 in6_dev_put(idev);
3053
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003054 /* Step 3: clear tempaddr list */
stephen hemminger372e6c82010-03-17 20:31:09 +00003055 while (!list_empty(&idev->tempaddr_list)) {
3056 ifa = list_first_entry(&idev->tempaddr_list,
3057 struct inet6_ifaddr, tmp_list);
3058 list_del(&ifa->tmp_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003059 write_unlock_bh(&idev->lock);
3060 spin_lock_bh(&ifa->lock);
3061
3062 if (ifa->ifpub) {
3063 in6_ifa_put(ifa->ifpub);
3064 ifa->ifpub = NULL;
3065 }
3066 spin_unlock_bh(&ifa->lock);
3067 in6_ifa_put(ifa);
3068 write_lock_bh(&idev->lock);
3069 }
3070#endif
stephen hemminger8f37ada2010-03-03 08:19:59 +00003071
stephen hemminger502a2ff2010-03-17 20:31:13 +00003072 while (!list_empty(&idev->addr_list)) {
3073 ifa = list_first_entry(&idev->addr_list,
3074 struct inet6_ifaddr, if_list);
stephen hemminger84e8b802010-03-02 13:32:46 +00003075 addrconf_del_timer(ifa);
3076
David S. Miller73a8bd72011-01-23 23:27:15 -08003077 list_del(&ifa->if_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003078
David S. Miller73a8bd72011-01-23 23:27:15 -08003079 write_unlock_bh(&idev->lock);
stephen hemminger84e8b802010-03-02 13:32:46 +00003080
David S. Miller73a8bd72011-01-23 23:27:15 -08003081 spin_lock_bh(&ifa->state_lock);
3082 state = ifa->state;
3083 ifa->state = INET6_IFADDR_STATE_DEAD;
3084 spin_unlock_bh(&ifa->state_lock);
stephen hemminger84e8b802010-03-02 13:32:46 +00003085
David S. Miller73a8bd72011-01-23 23:27:15 -08003086 if (state != INET6_IFADDR_STATE_DEAD) {
3087 __ipv6_ifa_notify(RTM_DELADDR, ifa);
Cong Wangf88c91d2013-04-14 23:18:43 +08003088 inet6addr_notifier_call_chain(NETDEV_DOWN, ifa);
stephen hemminger27bdb2a2010-04-12 05:41:32 +00003089 }
David S. Miller73a8bd72011-01-23 23:27:15 -08003090 in6_ifa_put(ifa);
stephen hemminger8f37ada2010-03-03 08:19:59 +00003091
David S. Miller73a8bd72011-01-23 23:27:15 -08003092 write_lock_bh(&idev->lock);
3093 }
stephen hemminger8f37ada2010-03-03 08:19:59 +00003094
Linus Torvalds1da177e2005-04-16 15:20:36 -07003095 write_unlock_bh(&idev->lock);
3096
3097 /* Step 5: Discard multicast list */
Denis V. Lunev439e2382008-04-03 13:30:17 -07003098 if (how)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003099 ipv6_mc_destroy_dev(idev);
3100 else
3101 ipv6_mc_down(idev);
3102
Linus Torvalds1da177e2005-04-16 15:20:36 -07003103 idev->tstamp = jiffies;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003104
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003105 /* Last: Shot the device (if unregistered) */
Denis V. Lunev439e2382008-04-03 13:30:17 -07003106 if (how) {
Pavel Emelyanov408c4762008-01-10 17:41:21 -08003107 addrconf_sysctl_unregister(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003108 neigh_parms_release(&nd_tbl, idev->nd_parms);
3109 neigh_ifdown(&nd_tbl, dev);
3110 in6_dev_put(idev);
3111 }
3112 return 0;
3113}
3114
3115static void addrconf_rs_timer(unsigned long data)
3116{
3117 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
stephen hemminger5b2a1952010-03-02 13:32:45 +00003118 struct inet6_dev *idev = ifp->idev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003119
stephen hemminger5b2a1952010-03-02 13:32:45 +00003120 read_lock(&idev->lock);
3121 if (idev->dead || !(idev->if_flags & IF_READY))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003122 goto out;
3123
Shmulik Ladkani9ba2add2012-12-02 01:44:53 +00003124 if (!ipv6_accept_ra(idev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003125 goto out;
stephen hemminger5b2a1952010-03-02 13:32:45 +00003126
3127 /* Announcement received after solicitation was sent */
3128 if (idev->if_flags & IF_RA_RCVD)
3129 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003130
3131 spin_lock(&ifp->lock);
stephen hemminger5b2a1952010-03-02 13:32:45 +00003132 if (ifp->probes++ < idev->cnf.rtr_solicits) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003133 /* The wait after the last probe can be shorter */
3134 addrconf_mod_timer(ifp, AC_RS,
stephen hemminger5b2a1952010-03-02 13:32:45 +00003135 (ifp->probes == idev->cnf.rtr_solicits) ?
3136 idev->cnf.rtr_solicit_delay :
3137 idev->cnf.rtr_solicit_interval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003138 spin_unlock(&ifp->lock);
3139
stephen hemminger5b2a1952010-03-02 13:32:45 +00003140 ndisc_send_rs(idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003141 } else {
3142 spin_unlock(&ifp->lock);
3143 /*
3144 * Note: we do not support deprecated "all on-link"
3145 * assumption any longer.
3146 */
Joe Perches91df42b2012-05-15 14:11:54 +00003147 pr_debug("%s: no IPv6 routers present\n", idev->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003148 }
3149
3150out:
stephen hemminger5b2a1952010-03-02 13:32:45 +00003151 read_unlock(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003152 in6_ifa_put(ifp);
3153}
3154
3155/*
3156 * Duplicate Address Detection
3157 */
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003158static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
3159{
3160 unsigned long rand_num;
3161 struct inet6_dev *idev = ifp->idev;
3162
Neil Horman95c385b2007-04-25 17:08:10 -07003163 if (ifp->flags & IFA_F_OPTIMISTIC)
3164 rand_num = 0;
3165 else
3166 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
3167
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003168 ifp->probes = idev->cnf.dad_transmits;
3169 addrconf_mod_timer(ifp, AC_DAD, rand_num);
3170}
3171
David S. Millercf22f9a2012-04-14 21:37:40 -04003172static void addrconf_dad_start(struct inet6_ifaddr *ifp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003173{
3174 struct inet6_dev *idev = ifp->idev;
3175 struct net_device *dev = idev->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003176
3177 addrconf_join_solict(dev, &ifp->addr);
3178
Linus Torvalds1da177e2005-04-16 15:20:36 -07003179 net_srandom(ifp->addr.s6_addr32[3]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003180
3181 read_lock_bh(&idev->lock);
Herbert Xu622ccdf2010-05-18 15:56:06 -07003182 spin_lock(&ifp->lock);
Herbert Xue9d3e082010-05-18 15:36:06 -07003183 if (ifp->state == INET6_IFADDR_STATE_DEAD)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003184 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003185
3186 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09003187 idev->cnf.accept_dad < 1 ||
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003188 !(ifp->flags&IFA_F_TENTATIVE) ||
3189 ifp->flags & IFA_F_NODAD) {
Brian Haleycc411d02009-09-09 14:41:32 +00003190 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED);
stephen hemminger21809fa2010-02-08 19:48:52 +00003191 spin_unlock(&ifp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003192 read_unlock_bh(&idev->lock);
3193
3194 addrconf_dad_completed(ifp);
3195 return;
3196 }
3197
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08003198 if (!(idev->if_flags & IF_READY)) {
stephen hemminger21809fa2010-02-08 19:48:52 +00003199 spin_unlock(&ifp->lock);
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08003200 read_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003201 /*
Masatake YAMATO590a9882009-06-09 10:41:12 +09003202 * If the device is not ready:
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003203 * - keep it tentative if it is a permanent address.
3204 * - otherwise, kill it.
3205 */
3206 in6_ifa_hold(ifp);
Brian Haleycc411d02009-09-09 14:41:32 +00003207 addrconf_dad_stop(ifp, 0);
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08003208 return;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003209 }
Neil Horman95c385b2007-04-25 17:08:10 -07003210
3211 /*
3212 * Optimistic nodes can start receiving
3213 * Frames right away
3214 */
Stephen Hemmingere21e8462010-03-20 16:09:01 -07003215 if (ifp->flags & IFA_F_OPTIMISTIC)
Neil Horman95c385b2007-04-25 17:08:10 -07003216 ip6_ins_rt(ifp->rt);
3217
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08003218 addrconf_dad_kick(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003219out:
Herbert Xu622ccdf2010-05-18 15:56:06 -07003220 spin_unlock(&ifp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003221 read_unlock_bh(&idev->lock);
3222}
3223
3224static void addrconf_dad_timer(unsigned long data)
3225{
3226 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
3227 struct inet6_dev *idev = ifp->idev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003228 struct in6_addr mcaddr;
3229
Herbert Xuf2344a12010-05-18 15:55:27 -07003230 if (!ifp->probes && addrconf_dad_end(ifp))
3231 goto out;
3232
stephen hemminger122e4512010-03-02 13:32:44 +00003233 read_lock(&idev->lock);
3234 if (idev->dead || !(idev->if_flags & IF_READY)) {
3235 read_unlock(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003236 goto out;
3237 }
stephen hemminger21809fa2010-02-08 19:48:52 +00003238
3239 spin_lock(&ifp->lock);
Herbert Xu622ccdf2010-05-18 15:56:06 -07003240 if (ifp->state == INET6_IFADDR_STATE_DEAD) {
3241 spin_unlock(&ifp->lock);
3242 read_unlock(&idev->lock);
3243 goto out;
3244 }
3245
Linus Torvalds1da177e2005-04-16 15:20:36 -07003246 if (ifp->probes == 0) {
3247 /*
3248 * DAD was successful
3249 */
3250
Brian Haleycc411d02009-09-09 14:41:32 +00003251 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED);
stephen hemminger21809fa2010-02-08 19:48:52 +00003252 spin_unlock(&ifp->lock);
stephen hemminger122e4512010-03-02 13:32:44 +00003253 read_unlock(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003254
3255 addrconf_dad_completed(ifp);
3256
3257 goto out;
3258 }
3259
3260 ifp->probes--;
3261 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
stephen hemminger21809fa2010-02-08 19:48:52 +00003262 spin_unlock(&ifp->lock);
stephen hemminger122e4512010-03-02 13:32:44 +00003263 read_unlock(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003264
3265 /* send a neighbour solicitation for our addr */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003266 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
YOSHIFUJI Hideakid7aabf22008-04-10 15:42:11 +09003267 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003268out:
3269 in6_ifa_put(ifp);
3270}
3271
3272static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
3273{
Stephen Hemmingere21e8462010-03-20 16:09:01 -07003274 struct net_device *dev = ifp->idev->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003275
3276 /*
3277 * Configure the address for reception. Now it is valid.
3278 */
3279
3280 ipv6_ifa_notify(RTM_NEWADDR, ifp);
3281
Tore Anderson026359b2011-08-28 23:47:33 +00003282 /* If added prefix is link local and we are prepared to process
3283 router advertisements, start sending router solicitations.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003284 */
3285
Shmulik Ladkaniaeaf6e92012-11-30 10:25:59 +00003286 if (ipv6_accept_ra(ifp->idev) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07003287 ifp->idev->cnf.rtr_solicits > 0 &&
3288 (dev->flags&IFF_LOOPBACK) == 0 &&
3289 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003290 /*
3291 * If a host as already performed a random delay
3292 * [...] as part of DAD [...] there is no need
3293 * to delay again before sending the first RS
3294 */
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +09003295 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003296
3297 spin_lock_bh(&ifp->lock);
3298 ifp->probes = 1;
3299 ifp->idev->if_flags |= IF_RS_SENT;
3300 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
3301 spin_unlock_bh(&ifp->lock);
3302 }
3303}
3304
Stephen Hemmingere21e8462010-03-20 16:09:01 -07003305static void addrconf_dad_run(struct inet6_dev *idev)
3306{
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09003307 struct inet6_ifaddr *ifp;
3308
3309 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00003310 list_for_each_entry(ifp, &idev->addr_list, if_list) {
stephen hemminger21809fa2010-02-08 19:48:52 +00003311 spin_lock(&ifp->lock);
Herbert Xuf2344a12010-05-18 15:55:27 -07003312 if (ifp->flags & IFA_F_TENTATIVE &&
3313 ifp->state == INET6_IFADDR_STATE_DAD)
3314 addrconf_dad_kick(ifp);
stephen hemminger21809fa2010-02-08 19:48:52 +00003315 spin_unlock(&ifp->lock);
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09003316 }
3317 read_unlock_bh(&idev->lock);
3318}
3319
Linus Torvalds1da177e2005-04-16 15:20:36 -07003320#ifdef CONFIG_PROC_FS
3321struct if6_iter_state {
Daniel Lezcano3c400902008-01-10 22:42:49 -08003322 struct seq_net_private p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003323 int bucket;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003324 int offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003325};
3326
Mihai Maruseac1d578302012-01-03 23:31:35 +00003327static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003328{
3329 struct inet6_ifaddr *ifa = NULL;
3330 struct if6_iter_state *state = seq->private;
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +09003331 struct net *net = seq_file_net(seq);
Mihai Maruseac1d578302012-01-03 23:31:35 +00003332 int p = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003333
Mihai Maruseac1d578302012-01-03 23:31:35 +00003334 /* initial bucket if pos is 0 */
3335 if (pos == 0) {
3336 state->bucket = 0;
3337 state->offset = 0;
3338 }
3339
3340 for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
Sasha Levinb67bfe02013-02-27 17:06:00 -08003341 hlist_for_each_entry_rcu_bh(ifa, &inet6_addr_lst[state->bucket],
Mihai Maruseac1d578302012-01-03 23:31:35 +00003342 addr_lst) {
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003343 if (!net_eq(dev_net(ifa->idev->dev), net))
3344 continue;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003345 /* sync with offset */
3346 if (p < state->offset) {
3347 p++;
3348 continue;
3349 }
3350 state->offset++;
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003351 return ifa;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003352 }
3353
3354 /* prepare for next bucket */
3355 state->offset = 0;
3356 p = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003357 }
stephen hemmingerc2e21292010-03-17 20:31:10 +00003358 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003359}
3360
stephen hemmingerc2e21292010-03-17 20:31:10 +00003361static struct inet6_ifaddr *if6_get_next(struct seq_file *seq,
3362 struct inet6_ifaddr *ifa)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003363{
3364 struct if6_iter_state *state = seq->private;
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +09003365 struct net *net = seq_file_net(seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003366
Sasha Levinb67bfe02013-02-27 17:06:00 -08003367 hlist_for_each_entry_continue_rcu_bh(ifa, addr_lst) {
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003368 if (!net_eq(dev_net(ifa->idev->dev), net))
3369 continue;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003370 state->offset++;
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003371 return ifa;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003372 }
stephen hemmingerc2e21292010-03-17 20:31:10 +00003373
3374 while (++state->bucket < IN6_ADDR_HSIZE) {
Mihai Maruseac1d578302012-01-03 23:31:35 +00003375 state->offset = 0;
Sasha Levinb67bfe02013-02-27 17:06:00 -08003376 hlist_for_each_entry_rcu_bh(ifa,
stephen hemmingerc2e21292010-03-17 20:31:10 +00003377 &inet6_addr_lst[state->bucket], addr_lst) {
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003378 if (!net_eq(dev_net(ifa->idev->dev), net))
3379 continue;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003380 state->offset++;
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003381 return ifa;
Daniel Lezcano3c400902008-01-10 22:42:49 -08003382 }
3383 }
3384
stephen hemmingerc2e21292010-03-17 20:31:10 +00003385 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003386}
3387
Linus Torvalds1da177e2005-04-16 15:20:36 -07003388static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
Eric Dumazet4f70ecc2010-05-03 10:50:14 +00003389 __acquires(rcu_bh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003390{
stephen hemminger5c578ae2010-03-17 20:31:11 +00003391 rcu_read_lock_bh();
Mihai Maruseac1d578302012-01-03 23:31:35 +00003392 return if6_get_first(seq, *pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003393}
3394
3395static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
3396{
3397 struct inet6_ifaddr *ifa;
3398
3399 ifa = if6_get_next(seq, v);
3400 ++*pos;
3401 return ifa;
3402}
3403
3404static void if6_seq_stop(struct seq_file *seq, void *v)
Eric Dumazet4f70ecc2010-05-03 10:50:14 +00003405 __releases(rcu_bh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003406{
stephen hemminger5c578ae2010-03-17 20:31:11 +00003407 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003408}
3409
3410static int if6_seq_show(struct seq_file *seq, void *v)
3411{
3412 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
Harvey Harrison4b7a4272008-10-29 12:50:24 -07003413 seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n",
Harvey Harrisonb0711952008-10-28 16:05:40 -07003414 &ifp->addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003415 ifp->idev->dev->ifindex,
3416 ifp->prefix_len,
3417 ifp->scope,
3418 ifp->flags,
3419 ifp->idev->dev->name);
3420 return 0;
3421}
3422
Philippe De Muyter56b3d972007-07-10 23:07:31 -07003423static const struct seq_operations if6_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003424 .start = if6_seq_start,
3425 .next = if6_seq_next,
3426 .show = if6_seq_show,
3427 .stop = if6_seq_stop,
3428};
3429
3430static int if6_seq_open(struct inode *inode, struct file *file)
3431{
Daniel Lezcano3c400902008-01-10 22:42:49 -08003432 return seq_open_net(inode, file, &if6_seq_ops,
3433 sizeof(struct if6_iter_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003434}
3435
Arjan van de Ven9a321442007-02-12 00:55:35 -08003436static const struct file_operations if6_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003437 .owner = THIS_MODULE,
3438 .open = if6_seq_open,
3439 .read = seq_read,
3440 .llseek = seq_lseek,
Daniel Lezcano3c400902008-01-10 22:42:49 -08003441 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003442};
3443
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00003444static int __net_init if6_proc_net_init(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003445{
Gao fengd4beaa62013-02-18 01:34:54 +00003446 if (!proc_create("if_inet6", S_IRUGO, net->proc_net, &if6_fops))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003447 return -ENOMEM;
3448 return 0;
3449}
3450
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00003451static void __net_exit if6_proc_net_exit(struct net *net)
Daniel Lezcano3c400902008-01-10 22:42:49 -08003452{
Gao fengece31ff2013-02-18 01:34:56 +00003453 remove_proc_entry("if_inet6", net->proc_net);
Daniel Lezcano3c400902008-01-10 22:42:49 -08003454}
3455
3456static struct pernet_operations if6_proc_net_ops = {
3457 .init = if6_proc_net_init,
3458 .exit = if6_proc_net_exit,
3459};
3460
3461int __init if6_proc_init(void)
3462{
3463 return register_pernet_subsys(&if6_proc_net_ops);
3464}
3465
Linus Torvalds1da177e2005-04-16 15:20:36 -07003466void if6_proc_exit(void)
3467{
Daniel Lezcano3c400902008-01-10 22:42:49 -08003468 unregister_pernet_subsys(&if6_proc_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003469}
3470#endif /* CONFIG_PROC_FS */
3471
Amerigo Wang07a93622012-10-29 16:23:10 +00003472#if IS_ENABLED(CONFIG_IPV6_MIP6)
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003473/* Check if address is a home address configured on any interface. */
Eric Dumazetb71d1d42011-04-22 04:53:02 +00003474int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr)
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003475{
3476 int ret = 0;
stephen hemmingerc2e21292010-03-17 20:31:10 +00003477 struct inet6_ifaddr *ifp = NULL;
Eric Dumazetddbe5032012-07-18 08:11:12 +00003478 unsigned int hash = inet6_addr_hash(addr);
stephen hemmingerc2e21292010-03-17 20:31:10 +00003479
stephen hemminger5c578ae2010-03-17 20:31:11 +00003480 rcu_read_lock_bh();
Sasha Levinb67bfe02013-02-27 17:06:00 -08003481 hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09003482 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcano389f6612008-01-10 22:44:40 -08003483 continue;
YOSHIFUJI Hideakicaad2952008-04-10 15:42:07 +09003484 if (ipv6_addr_equal(&ifp->addr, addr) &&
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003485 (ifp->flags & IFA_F_HOMEADDRESS)) {
3486 ret = 1;
3487 break;
3488 }
3489 }
stephen hemminger5c578ae2010-03-17 20:31:11 +00003490 rcu_read_unlock_bh();
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003491 return ret;
3492}
3493#endif
3494
Linus Torvalds1da177e2005-04-16 15:20:36 -07003495/*
3496 * Periodic address status verification
3497 */
3498
3499static void addrconf_verify(unsigned long foo)
3500{
YOSHIFUJI Hideakib2db7562010-03-20 16:11:12 -07003501 unsigned long now, next, next_sec, next_sched;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003502 struct inet6_ifaddr *ifp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003503 int i;
3504
stephen hemminger5c578ae2010-03-17 20:31:11 +00003505 rcu_read_lock_bh();
3506 spin_lock(&addrconf_verify_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003507 now = jiffies;
YOSHIFUJI Hideakib2db7562010-03-20 16:11:12 -07003508 next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003509
3510 del_timer(&addr_chk_timer);
3511
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003512 for (i = 0; i < IN6_ADDR_HSIZE; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003513restart:
Sasha Levinb67bfe02013-02-27 17:06:00 -08003514 hlist_for_each_entry_rcu_bh(ifp,
stephen hemminger5c578ae2010-03-17 20:31:11 +00003515 &inet6_addr_lst[i], addr_lst) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003516 unsigned long age;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003517
3518 if (ifp->flags & IFA_F_PERMANENT)
3519 continue;
3520
3521 spin_lock(&ifp->lock);
YOSHIFUJI Hideakib2db7562010-03-20 16:11:12 -07003522 /* We try to batch several events at once. */
3523 age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003524
YOSHIFUJI Hideaki8f27ebb2006-07-28 18:12:11 +09003525 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
3526 age >= ifp->valid_lft) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003527 spin_unlock(&ifp->lock);
3528 in6_ifa_hold(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003529 ipv6_del_addr(ifp);
3530 goto restart;
YOSHIFUJI Hideaki8f27ebb2006-07-28 18:12:11 +09003531 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
3532 spin_unlock(&ifp->lock);
3533 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003534 } else if (age >= ifp->prefered_lft) {
Brian Haleya1ed0522009-07-02 07:10:52 +00003535 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003536 int deprecate = 0;
3537
3538 if (!(ifp->flags&IFA_F_DEPRECATED)) {
3539 deprecate = 1;
3540 ifp->flags |= IFA_F_DEPRECATED;
3541 }
3542
3543 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
3544 next = ifp->tstamp + ifp->valid_lft * HZ;
3545
3546 spin_unlock(&ifp->lock);
3547
3548 if (deprecate) {
3549 in6_ifa_hold(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003550
3551 ipv6_ifa_notify(0, ifp);
3552 in6_ifa_put(ifp);
3553 goto restart;
3554 }
3555#ifdef CONFIG_IPV6_PRIVACY
3556 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
3557 !(ifp->flags&IFA_F_TENTATIVE)) {
stephen hemminger88949cf2010-03-17 20:31:17 +00003558 unsigned long regen_advance = ifp->idev->cnf.regen_max_retry *
3559 ifp->idev->cnf.dad_transmits *
3560 ifp->idev->nd_parms->retrans_time / HZ;
3561
Linus Torvalds1da177e2005-04-16 15:20:36 -07003562 if (age >= ifp->prefered_lft - regen_advance) {
3563 struct inet6_ifaddr *ifpub = ifp->ifpub;
3564 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3565 next = ifp->tstamp + ifp->prefered_lft * HZ;
3566 if (!ifp->regen_count && ifpub) {
3567 ifp->regen_count++;
3568 in6_ifa_hold(ifp);
3569 in6_ifa_hold(ifpub);
3570 spin_unlock(&ifp->lock);
stephen hemminger5c578ae2010-03-17 20:31:11 +00003571
Hiroyuki YAMAMORI291d8092005-12-23 11:24:05 -08003572 spin_lock(&ifpub->lock);
3573 ifpub->regen_count = 0;
3574 spin_unlock(&ifpub->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003575 ipv6_create_tempaddr(ifpub, ifp);
3576 in6_ifa_put(ifpub);
3577 in6_ifa_put(ifp);
3578 goto restart;
3579 }
3580 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
3581 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
3582 spin_unlock(&ifp->lock);
3583#endif
3584 } else {
3585 /* ifp->prefered_lft <= ifp->valid_lft */
3586 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3587 next = ifp->tstamp + ifp->prefered_lft * HZ;
3588 spin_unlock(&ifp->lock);
3589 }
3590 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003591 }
3592
YOSHIFUJI Hideakib2db7562010-03-20 16:11:12 -07003593 next_sec = round_jiffies_up(next);
3594 next_sched = next;
3595
3596 /* If rounded timeout is accurate enough, accept it. */
3597 if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ))
3598 next_sched = next_sec;
3599
3600 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
3601 if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX))
3602 next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX;
3603
3604 ADBG((KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
3605 now, next, next_sec, next_sched));
3606
3607 addr_chk_timer.expires = next_sched;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003608 add_timer(&addr_chk_timer);
stephen hemminger5c578ae2010-03-17 20:31:11 +00003609 spin_unlock(&addrconf_verify_lock);
3610 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003611}
3612
Thomas Graf461d8832006-09-18 00:09:49 -07003613static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
3614{
3615 struct in6_addr *pfx = NULL;
3616
3617 if (addr)
3618 pfx = nla_data(addr);
3619
3620 if (local) {
3621 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
3622 pfx = NULL;
3623 else
3624 pfx = nla_data(local);
3625 }
3626
3627 return pfx;
3628}
3629
Patrick McHardyef7c79e2007-06-05 12:38:30 -07003630static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
Thomas Graf461d8832006-09-18 00:09:49 -07003631 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
3632 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
3633 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
3634};
3635
Linus Torvalds1da177e2005-04-16 15:20:36 -07003636static int
Thomas Graf661d2962013-03-21 07:45:29 +00003637inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003638{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09003639 struct net *net = sock_net(skb->sk);
Thomas Grafb933f712006-09-18 00:10:19 -07003640 struct ifaddrmsg *ifm;
3641 struct nlattr *tb[IFA_MAX+1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07003642 struct in6_addr *pfx;
Thomas Grafb933f712006-09-18 00:10:19 -07003643 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003644
Thomas Grafb933f712006-09-18 00:10:19 -07003645 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3646 if (err < 0)
3647 return err;
3648
3649 ifm = nlmsg_data(nlh);
3650 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003651 if (pfx == NULL)
3652 return -EINVAL;
3653
Daniel Lezcanoaf284932008-03-05 10:46:57 -08003654 return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003655}
3656
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003657static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
3658 u32 prefered_lft, u32 valid_lft)
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003659{
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07003660 u32 flags;
3661 clock_t expires;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09003662 unsigned long timeout;
YOSHIFUJI Hideaki46d48042007-02-07 20:36:26 +09003663
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003664 if (!valid_lft || (prefered_lft > valid_lft))
3665 return -EINVAL;
3666
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09003667 timeout = addrconf_timeout_fixup(valid_lft, HZ);
3668 if (addrconf_finite_timeout(timeout)) {
3669 expires = jiffies_to_clock_t(timeout * HZ);
3670 valid_lft = timeout;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07003671 flags = RTF_EXPIRES;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09003672 } else {
3673 expires = 0;
3674 flags = 0;
3675 ifa_flags |= IFA_F_PERMANENT;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07003676 }
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003677
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09003678 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
3679 if (addrconf_finite_timeout(timeout)) {
3680 if (timeout == 0)
3681 ifa_flags |= IFA_F_DEPRECATED;
3682 prefered_lft = timeout;
3683 }
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003684
3685 spin_lock_bh(&ifp->lock);
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003686 ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003687 ifp->tstamp = jiffies;
3688 ifp->valid_lft = valid_lft;
3689 ifp->prefered_lft = prefered_lft;
3690
3691 spin_unlock_bh(&ifp->lock);
3692 if (!(ifp->flags&IFA_F_TENTATIVE))
3693 ipv6_ifa_notify(0, ifp);
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003694
YOSHIFUJI Hideaki46d48042007-02-07 20:36:26 +09003695 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07003696 expires, flags);
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003697 addrconf_verify(0);
3698
3699 return 0;
3700}
3701
3702static int
Thomas Graf661d2962013-03-21 07:45:29 +00003703inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003704{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09003705 struct net *net = sock_net(skb->sk);
Thomas Graf461d8832006-09-18 00:09:49 -07003706 struct ifaddrmsg *ifm;
3707 struct nlattr *tb[IFA_MAX+1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07003708 struct in6_addr *pfx;
Thomas Graf7198f8c2006-09-18 00:13:46 -07003709 struct inet6_ifaddr *ifa;
3710 struct net_device *dev;
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003711 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
3712 u8 ifa_flags;
Thomas Graf461d8832006-09-18 00:09:49 -07003713 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003714
Thomas Graf461d8832006-09-18 00:09:49 -07003715 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3716 if (err < 0)
3717 return err;
3718
3719 ifm = nlmsg_data(nlh);
3720 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003721 if (pfx == NULL)
3722 return -EINVAL;
3723
Thomas Graf461d8832006-09-18 00:09:49 -07003724 if (tb[IFA_CACHEINFO]) {
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09003725 struct ifa_cacheinfo *ci;
Thomas Graf461d8832006-09-18 00:09:49 -07003726
3727 ci = nla_data(tb[IFA_CACHEINFO]);
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09003728 valid_lft = ci->ifa_valid;
Thomas Graf461d8832006-09-18 00:09:49 -07003729 preferred_lft = ci->ifa_prefered;
3730 } else {
3731 preferred_lft = INFINITY_LIFE_TIME;
3732 valid_lft = INFINITY_LIFE_TIME;
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09003733 }
3734
Daniel Lezcanoaf284932008-03-05 10:46:57 -08003735 dev = __dev_get_by_index(net, ifm->ifa_index);
Thomas Graf7198f8c2006-09-18 00:13:46 -07003736 if (dev == NULL)
3737 return -ENODEV;
3738
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003739 /* We ignore other flags so far. */
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003740 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003741
Daniel Lezcano1cab3da2008-01-10 22:44:09 -08003742 ifa = ipv6_get_ifaddr(net, pfx, dev, 1);
Thomas Graf7198f8c2006-09-18 00:13:46 -07003743 if (ifa == NULL) {
3744 /*
3745 * It would be best to check for !NLM_F_CREATE here but
3746 * userspace alreay relies on not having to provide this.
3747 */
Daniel Lezcanoaf284932008-03-05 10:46:57 -08003748 return inet6_addr_add(net, ifm->ifa_index, pfx,
3749 ifm->ifa_prefixlen, ifa_flags,
3750 preferred_lft, valid_lft);
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003751 }
3752
Thomas Graf7198f8c2006-09-18 00:13:46 -07003753 if (nlh->nlmsg_flags & NLM_F_EXCL ||
3754 !(nlh->nlmsg_flags & NLM_F_REPLACE))
3755 err = -EEXIST;
3756 else
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003757 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
Thomas Graf7198f8c2006-09-18 00:13:46 -07003758
3759 in6_ifa_put(ifa);
3760
3761 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003762}
3763
Thomas Graf101bb222006-09-18 00:11:52 -07003764static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3765 u8 scope, int ifindex)
3766{
3767 struct ifaddrmsg *ifm;
3768
3769 ifm = nlmsg_data(nlh);
3770 ifm->ifa_family = AF_INET6;
3771 ifm->ifa_prefixlen = prefixlen;
3772 ifm->ifa_flags = flags;
3773 ifm->ifa_scope = scope;
3774 ifm->ifa_index = ifindex;
3775}
3776
Thomas Graf85486af2006-09-18 00:11:24 -07003777static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3778 unsigned long tstamp, u32 preferred, u32 valid)
3779{
3780 struct ifa_cacheinfo ci;
3781
Thomas Graf18a31e12010-11-17 04:12:02 +00003782 ci.cstamp = cstamp_delta(cstamp);
3783 ci.tstamp = cstamp_delta(tstamp);
Thomas Graf85486af2006-09-18 00:11:24 -07003784 ci.ifa_prefered = preferred;
3785 ci.ifa_valid = valid;
3786
3787 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3788}
3789
Thomas Graf101bb222006-09-18 00:11:52 -07003790static inline int rt_scope(int ifa_scope)
3791{
3792 if (ifa_scope & IFA_HOST)
3793 return RT_SCOPE_HOST;
3794 else if (ifa_scope & IFA_LINK)
3795 return RT_SCOPE_LINK;
3796 else if (ifa_scope & IFA_SITE)
3797 return RT_SCOPE_SITE;
3798 else
3799 return RT_SCOPE_UNIVERSE;
3800}
3801
Thomas Graf0ab68032006-09-18 00:12:35 -07003802static inline int inet6_ifaddr_msgsize(void)
3803{
Thomas Graf339bf982006-11-10 14:10:15 -08003804 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3805 + nla_total_size(16) /* IFA_ADDRESS */
3806 + nla_total_size(sizeof(struct ifa_cacheinfo));
Thomas Graf0ab68032006-09-18 00:12:35 -07003807}
YOSHIFUJI Hideakic5396a32006-06-17 22:48:48 -07003808
Linus Torvalds1da177e2005-04-16 15:20:36 -07003809static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
Eric W. Biederman15e47302012-09-07 20:12:54 +00003810 u32 portid, u32 seq, int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003811{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003812 struct nlmsghdr *nlh;
Thomas Graf85486af2006-09-18 00:11:24 -07003813 u32 preferred, valid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003814
Eric W. Biederman15e47302012-09-07 20:12:54 +00003815 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags);
Thomas Graf0ab68032006-09-18 00:12:35 -07003816 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -08003817 return -EMSGSIZE;
Thomas Graf0ab68032006-09-18 00:12:35 -07003818
Thomas Graf101bb222006-09-18 00:11:52 -07003819 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3820 ifa->idev->dev->ifindex);
3821
Linus Torvalds1da177e2005-04-16 15:20:36 -07003822 if (!(ifa->flags&IFA_F_PERMANENT)) {
Thomas Graf85486af2006-09-18 00:11:24 -07003823 preferred = ifa->prefered_lft;
3824 valid = ifa->valid_lft;
3825 if (preferred != INFINITY_LIFE_TIME) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003826 long tval = (jiffies - ifa->tstamp)/HZ;
Jens Rosenbooma1faa692009-06-25 04:55:50 +00003827 if (preferred > tval)
3828 preferred -= tval;
3829 else
3830 preferred = 0;
Ben Hutchingsf56619f2010-06-26 11:37:47 +00003831 if (valid != INFINITY_LIFE_TIME) {
3832 if (valid > tval)
3833 valid -= tval;
3834 else
3835 valid = 0;
3836 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003837 }
3838 } else {
Thomas Graf85486af2006-09-18 00:11:24 -07003839 preferred = INFINITY_LIFE_TIME;
3840 valid = INFINITY_LIFE_TIME;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003841 }
Thomas Graf85486af2006-09-18 00:11:24 -07003842
Thomas Graf0ab68032006-09-18 00:12:35 -07003843 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
Patrick McHardy26932562007-01-31 23:16:40 -08003844 put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
3845 nlmsg_cancel(skb, nlh);
3846 return -EMSGSIZE;
3847 }
Thomas Graf85486af2006-09-18 00:11:24 -07003848
Thomas Graf0ab68032006-09-18 00:12:35 -07003849 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003850}
3851
3852static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
Eric W. Biederman15e47302012-09-07 20:12:54 +00003853 u32 portid, u32 seq, int event, u16 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003854{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003855 struct nlmsghdr *nlh;
Thomas Graf101bb222006-09-18 00:11:52 -07003856 u8 scope = RT_SCOPE_UNIVERSE;
3857 int ifindex = ifmca->idev->dev->ifindex;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003858
Thomas Graf101bb222006-09-18 00:11:52 -07003859 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3860 scope = RT_SCOPE_SITE;
3861
Eric W. Biederman15e47302012-09-07 20:12:54 +00003862 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags);
Thomas Graf0ab68032006-09-18 00:12:35 -07003863 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -08003864 return -EMSGSIZE;
Thomas Graf0ab68032006-09-18 00:12:35 -07003865
Thomas Graf101bb222006-09-18 00:11:52 -07003866 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
Thomas Graf0ab68032006-09-18 00:12:35 -07003867 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3868 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
Patrick McHardy26932562007-01-31 23:16:40 -08003869 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3870 nlmsg_cancel(skb, nlh);
3871 return -EMSGSIZE;
3872 }
Thomas Graf85486af2006-09-18 00:11:24 -07003873
Thomas Graf0ab68032006-09-18 00:12:35 -07003874 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003875}
3876
3877static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
Eric W. Biederman15e47302012-09-07 20:12:54 +00003878 u32 portid, u32 seq, int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003879{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003880 struct nlmsghdr *nlh;
Thomas Graf101bb222006-09-18 00:11:52 -07003881 u8 scope = RT_SCOPE_UNIVERSE;
3882 int ifindex = ifaca->aca_idev->dev->ifindex;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003883
Thomas Graf101bb222006-09-18 00:11:52 -07003884 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3885 scope = RT_SCOPE_SITE;
3886
Eric W. Biederman15e47302012-09-07 20:12:54 +00003887 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags);
Thomas Graf0ab68032006-09-18 00:12:35 -07003888 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -08003889 return -EMSGSIZE;
Thomas Graf0ab68032006-09-18 00:12:35 -07003890
Thomas Graf101bb222006-09-18 00:11:52 -07003891 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
Thomas Graf0ab68032006-09-18 00:12:35 -07003892 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3893 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
Patrick McHardy26932562007-01-31 23:16:40 -08003894 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3895 nlmsg_cancel(skb, nlh);
3896 return -EMSGSIZE;
3897 }
Thomas Graf85486af2006-09-18 00:11:24 -07003898
Thomas Graf0ab68032006-09-18 00:12:35 -07003899 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003900}
3901
Stephen Hemmingere21e8462010-03-20 16:09:01 -07003902enum addr_type_t {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003903 UNICAST_ADDR,
3904 MULTICAST_ADDR,
3905 ANYCAST_ADDR,
3906};
3907
Eric Dumazet234b27c2009-11-12 04:11:50 +00003908/* called with rcu_read_lock() */
3909static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb,
3910 struct netlink_callback *cb, enum addr_type_t type,
3911 int s_ip_idx, int *p_ip_idx)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003912{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003913 struct ifmcaddr6 *ifmca;
3914 struct ifacaddr6 *ifaca;
Eric Dumazet234b27c2009-11-12 04:11:50 +00003915 int err = 1;
3916 int ip_idx = *p_ip_idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003917
Eric Dumazet234b27c2009-11-12 04:11:50 +00003918 read_lock_bh(&idev->lock);
3919 switch (type) {
stephen hemminger502a2ff2010-03-17 20:31:13 +00003920 case UNICAST_ADDR: {
3921 struct inet6_ifaddr *ifa;
3922
Eric Dumazet234b27c2009-11-12 04:11:50 +00003923 /* unicast address incl. temp addr */
stephen hemminger502a2ff2010-03-17 20:31:13 +00003924 list_for_each_entry(ifa, &idev->addr_list, if_list) {
3925 if (++ip_idx < s_ip_idx)
Eric Dumazet234b27c2009-11-12 04:11:50 +00003926 continue;
3927 err = inet6_fill_ifaddr(skb, ifa,
Eric W. Biederman15e47302012-09-07 20:12:54 +00003928 NETLINK_CB(cb->skb).portid,
Eric Dumazet234b27c2009-11-12 04:11:50 +00003929 cb->nlh->nlmsg_seq,
3930 RTM_NEWADDR,
3931 NLM_F_MULTI);
3932 if (err <= 0)
3933 break;
Nicolas Dichtel63998ac2013-03-22 06:28:43 +00003934 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003935 }
Eric Dumazet234b27c2009-11-12 04:11:50 +00003936 break;
stephen hemminger502a2ff2010-03-17 20:31:13 +00003937 }
Eric Dumazet234b27c2009-11-12 04:11:50 +00003938 case MULTICAST_ADDR:
3939 /* multicast address */
3940 for (ifmca = idev->mc_list; ifmca;
3941 ifmca = ifmca->next, ip_idx++) {
3942 if (ip_idx < s_ip_idx)
3943 continue;
3944 err = inet6_fill_ifmcaddr(skb, ifmca,
Eric W. Biederman15e47302012-09-07 20:12:54 +00003945 NETLINK_CB(cb->skb).portid,
Eric Dumazet234b27c2009-11-12 04:11:50 +00003946 cb->nlh->nlmsg_seq,
3947 RTM_GETMULTICAST,
3948 NLM_F_MULTI);
3949 if (err <= 0)
3950 break;
3951 }
3952 break;
3953 case ANYCAST_ADDR:
3954 /* anycast address */
3955 for (ifaca = idev->ac_list; ifaca;
3956 ifaca = ifaca->aca_next, ip_idx++) {
3957 if (ip_idx < s_ip_idx)
3958 continue;
3959 err = inet6_fill_ifacaddr(skb, ifaca,
Eric W. Biederman15e47302012-09-07 20:12:54 +00003960 NETLINK_CB(cb->skb).portid,
Eric Dumazet234b27c2009-11-12 04:11:50 +00003961 cb->nlh->nlmsg_seq,
3962 RTM_GETANYCAST,
3963 NLM_F_MULTI);
3964 if (err <= 0)
3965 break;
3966 }
3967 break;
3968 default:
3969 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003970 }
Eric Dumazet234b27c2009-11-12 04:11:50 +00003971 read_unlock_bh(&idev->lock);
3972 *p_ip_idx = ip_idx;
3973 return err;
3974}
3975
3976static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3977 enum addr_type_t type)
3978{
3979 struct net *net = sock_net(skb->sk);
3980 int h, s_h;
3981 int idx, ip_idx;
3982 int s_idx, s_ip_idx;
3983 struct net_device *dev;
3984 struct inet6_dev *idev;
3985 struct hlist_head *head;
Eric Dumazet234b27c2009-11-12 04:11:50 +00003986
3987 s_h = cb->args[0];
3988 s_idx = idx = cb->args[1];
3989 s_ip_idx = ip_idx = cb->args[2];
3990
3991 rcu_read_lock();
Nicolas Dichtel63998ac2013-03-22 06:28:43 +00003992 cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ net->dev_base_seq;
Eric Dumazet234b27c2009-11-12 04:11:50 +00003993 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3994 idx = 0;
3995 head = &net->dev_index_head[h];
Sasha Levinb67bfe02013-02-27 17:06:00 -08003996 hlist_for_each_entry_rcu(dev, head, index_hlist) {
Eric Dumazet234b27c2009-11-12 04:11:50 +00003997 if (idx < s_idx)
3998 goto cont;
Patrick McHardy4b97efd2010-03-26 20:27:49 -07003999 if (h > s_h || idx > s_idx)
Eric Dumazet234b27c2009-11-12 04:11:50 +00004000 s_ip_idx = 0;
4001 ip_idx = 0;
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004002 idev = __in6_dev_get(dev);
4003 if (!idev)
Eric Dumazet234b27c2009-11-12 04:11:50 +00004004 goto cont;
4005
4006 if (in6_dump_addrs(idev, skb, cb, type,
4007 s_ip_idx, &ip_idx) <= 0)
4008 goto done;
4009cont:
4010 idx++;
4011 }
4012 }
4013done:
4014 rcu_read_unlock();
4015 cb->args[0] = h;
4016 cb->args[1] = idx;
4017 cb->args[2] = ip_idx;
4018
Linus Torvalds1da177e2005-04-16 15:20:36 -07004019 return skb->len;
4020}
4021
4022static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
4023{
4024 enum addr_type_t type = UNICAST_ADDR;
Denis V. Lunevb8542722007-12-01 00:21:31 +11004025
Linus Torvalds1da177e2005-04-16 15:20:36 -07004026 return inet6_dump_addr(skb, cb, type);
4027}
4028
4029static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
4030{
4031 enum addr_type_t type = MULTICAST_ADDR;
Denis V. Lunevb8542722007-12-01 00:21:31 +11004032
Linus Torvalds1da177e2005-04-16 15:20:36 -07004033 return inet6_dump_addr(skb, cb, type);
4034}
4035
4036
4037static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
4038{
4039 enum addr_type_t type = ANYCAST_ADDR;
Denis V. Lunevb8542722007-12-01 00:21:31 +11004040
Linus Torvalds1da177e2005-04-16 15:20:36 -07004041 return inet6_dump_addr(skb, cb, type);
4042}
4043
Thomas Graf661d2962013-03-21 07:45:29 +00004044static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh)
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004045{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09004046 struct net *net = sock_net(in_skb->sk);
Thomas Graf1b29fc22006-09-18 00:10:50 -07004047 struct ifaddrmsg *ifm;
4048 struct nlattr *tb[IFA_MAX+1];
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004049 struct in6_addr *addr = NULL;
4050 struct net_device *dev = NULL;
4051 struct inet6_ifaddr *ifa;
4052 struct sk_buff *skb;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004053 int err;
4054
Thomas Graf1b29fc22006-09-18 00:10:50 -07004055 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
4056 if (err < 0)
4057 goto errout;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004058
Thomas Graf1b29fc22006-09-18 00:10:50 -07004059 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
4060 if (addr == NULL) {
4061 err = -EINVAL;
4062 goto errout;
4063 }
4064
4065 ifm = nlmsg_data(nlh);
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004066 if (ifm->ifa_index)
Benjamin Thery6fda7352008-03-05 10:47:47 -08004067 dev = __dev_get_by_index(net, ifm->ifa_index);
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004068
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004069 ifa = ipv6_get_ifaddr(net, addr, dev, 1);
4070 if (!ifa) {
Thomas Graf1b29fc22006-09-18 00:10:50 -07004071 err = -EADDRNOTAVAIL;
4072 goto errout;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004073 }
4074
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004075 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL);
4076 if (!skb) {
Thomas Graf1b29fc22006-09-18 00:10:50 -07004077 err = -ENOBUFS;
4078 goto errout_ifa;
4079 }
4080
Eric W. Biederman15e47302012-09-07 20:12:54 +00004081 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).portid,
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004082 nlh->nlmsg_seq, RTM_NEWADDR, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08004083 if (err < 0) {
4084 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4085 WARN_ON(err == -EMSGSIZE);
4086 kfree_skb(skb);
4087 goto errout_ifa;
4088 }
Eric W. Biederman15e47302012-09-07 20:12:54 +00004089 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
Thomas Graf1b29fc22006-09-18 00:10:50 -07004090errout_ifa:
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004091 in6_ifa_put(ifa);
Thomas Graf1b29fc22006-09-18 00:10:50 -07004092errout:
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004093 return err;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004094}
4095
Linus Torvalds1da177e2005-04-16 15:20:36 -07004096static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
4097{
4098 struct sk_buff *skb;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09004099 struct net *net = dev_net(ifa->idev->dev);
Thomas Graf5d620262006-08-15 00:35:02 -07004100 int err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004101
Thomas Graf0ab68032006-09-18 00:12:35 -07004102 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
Thomas Graf5d620262006-08-15 00:35:02 -07004103 if (skb == NULL)
4104 goto errout;
4105
4106 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08004107 if (err < 0) {
4108 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4109 WARN_ON(err == -EMSGSIZE);
4110 kfree_skb(skb);
4111 goto errout;
4112 }
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -08004113 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
4114 return;
Thomas Graf5d620262006-08-15 00:35:02 -07004115errout:
4116 if (err < 0)
Benjamin Thery6fda7352008-03-05 10:47:47 -08004117 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004118}
4119
Dave Jonesb6f99a22007-03-22 12:27:49 -07004120static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004121 __s32 *array, int bytes)
4122{
Thomas Graf04561c12006-11-14 19:53:58 -08004123 BUG_ON(bytes < (DEVCONF_MAX * 4));
4124
Linus Torvalds1da177e2005-04-16 15:20:36 -07004125 memset(array, 0, bytes);
4126 array[DEVCONF_FORWARDING] = cnf->forwarding;
4127 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
4128 array[DEVCONF_MTU6] = cnf->mtu6;
4129 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
4130 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
4131 array[DEVCONF_AUTOCONF] = cnf->autoconf;
4132 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
4133 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
Thomas Graf93908d12010-11-17 01:44:24 +00004134 array[DEVCONF_RTR_SOLICIT_INTERVAL] =
4135 jiffies_to_msecs(cnf->rtr_solicit_interval);
4136 array[DEVCONF_RTR_SOLICIT_DELAY] =
4137 jiffies_to_msecs(cnf->rtr_solicit_delay);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004138 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
4139#ifdef CONFIG_IPV6_PRIVACY
4140 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
4141 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
4142 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
4143 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
4144 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
4145#endif
4146 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -08004147 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -08004148 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08004149#ifdef CONFIG_IPV6_ROUTER_PREF
4150 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
Thomas Graf93908d12010-11-17 01:44:24 +00004151 array[DEVCONF_RTR_PROBE_INTERVAL] =
4152 jiffies_to_msecs(cnf->rtr_probe_interval);
Neil Hormanfa03ef32007-01-30 14:30:10 -08004153#ifdef CONFIG_IPV6_ROUTE_INFO
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -08004154 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
4155#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08004156#endif
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -07004157 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -07004158 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
Neil Horman95c385b2007-04-25 17:08:10 -07004159#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4160 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
4161#endif
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09004162#ifdef CONFIG_IPV6_MROUTE
4163 array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding;
4164#endif
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +09004165 array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6;
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09004166 array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad;
Cosmin Ratiuc3faca02009-10-09 03:11:14 +00004167 array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao;
Hannes Frederic Sowa5cb04432012-11-06 16:46:20 +00004168 array[DEVCONF_NDISC_NOTIFY] = cnf->ndisc_notify;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004169}
4170
Thomas Grafb382b192010-11-16 04:33:57 +00004171static inline size_t inet6_ifla6_size(void)
4172{
4173 return nla_total_size(4) /* IFLA_INET6_FLAGS */
4174 + nla_total_size(sizeof(struct ifla_cacheinfo))
4175 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
4176 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004177 + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
4178 + nla_total_size(sizeof(struct in6_addr)); /* IFLA_INET6_TOKEN */
Thomas Grafb382b192010-11-16 04:33:57 +00004179}
4180
Thomas Graf339bf982006-11-10 14:10:15 -08004181static inline size_t inet6_if_nlmsg_size(void)
4182{
4183 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
4184 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
4185 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
4186 + nla_total_size(4) /* IFLA_MTU */
4187 + nla_total_size(4) /* IFLA_LINK */
Thomas Grafb382b192010-11-16 04:33:57 +00004188 + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
Thomas Graf339bf982006-11-10 14:10:15 -08004189}
YOSHIFUJI Hideakic5396a32006-06-17 22:48:48 -07004190
Eric Dumazetbe281e52011-05-19 01:14:23 +00004191static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib,
Tejun Heo7d720c32010-02-16 15:20:26 +00004192 int items, int bytes)
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004193{
4194 int i;
4195 int pad = bytes - sizeof(u64) * items;
4196 BUG_ON(pad < 0);
4197
4198 /* Use put_unaligned() because stats may not be aligned for u64. */
4199 put_unaligned(items, &stats[0]);
4200 for (i = 1; i < items; i++)
Eric Dumazetbe281e52011-05-19 01:14:23 +00004201 put_unaligned(atomic_long_read(&mib[i]), &stats[i]);
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004202
4203 memset(&stats[items], 0, pad);
4204}
4205
Eric Dumazet4ce3c182010-06-30 13:31:19 -07004206static inline void __snmp6_fill_stats64(u64 *stats, void __percpu **mib,
4207 int items, int bytes, size_t syncpoff)
4208{
4209 int i;
4210 int pad = bytes - sizeof(u64) * items;
4211 BUG_ON(pad < 0);
4212
4213 /* Use put_unaligned() because stats may not be aligned for u64. */
4214 put_unaligned(items, &stats[0]);
4215 for (i = 1; i < items; i++)
4216 put_unaligned(snmp_fold_field64(mib, i, syncpoff), &stats[i]);
4217
4218 memset(&stats[items], 0, pad);
4219}
4220
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004221static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
4222 int bytes)
4223{
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004224 switch (attrtype) {
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004225 case IFLA_INET6_STATS:
Eric Dumazet4ce3c182010-06-30 13:31:19 -07004226 __snmp6_fill_stats64(stats, (void __percpu **)idev->stats.ipv6,
4227 IPSTATS_MIB_MAX, bytes, offsetof(struct ipstats_mib, syncp));
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004228 break;
4229 case IFLA_INET6_ICMP6STATS:
Eric Dumazetbe281e52011-05-19 01:14:23 +00004230 __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, ICMP6_MIB_MAX, bytes);
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004231 break;
4232 }
4233}
4234
Thomas Grafb382b192010-11-16 04:33:57 +00004235static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004236{
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07004237 struct nlattr *nla;
Thomas Graf04561c12006-11-14 19:53:58 -08004238 struct ifla_cacheinfo ci;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004239
David S. Millerc78679e2012-04-01 20:27:33 -04004240 if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags))
4241 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004242 ci.max_reasm_len = IPV6_MAXPLEN;
David S. Miller24912422010-11-19 13:13:47 -08004243 ci.tstamp = cstamp_delta(idev->tstamp);
4244 ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time);
4245 ci.retrans_time = jiffies_to_msecs(idev->nd_parms->retrans_time);
David S. Millerc78679e2012-04-01 20:27:33 -04004246 if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci))
4247 goto nla_put_failure;
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07004248 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
4249 if (nla == NULL)
Thomas Graf04561c12006-11-14 19:53:58 -08004250 goto nla_put_failure;
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07004251 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004252
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07004253 /* XXX - MC not implemented */
4254
4255 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
4256 if (nla == NULL)
4257 goto nla_put_failure;
4258 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
4259
4260 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
4261 if (nla == NULL)
4262 goto nla_put_failure;
4263 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004264
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004265 nla = nla_reserve(skb, IFLA_INET6_TOKEN, sizeof(struct in6_addr));
4266 if (nla == NULL)
4267 goto nla_put_failure;
4268 read_lock_bh(&idev->lock);
4269 memcpy(nla_data(nla), idev->token.s6_addr, nla_len(nla));
4270 read_unlock_bh(&idev->lock);
4271
Thomas Grafb382b192010-11-16 04:33:57 +00004272 return 0;
4273
4274nla_put_failure:
4275 return -EMSGSIZE;
4276}
4277
4278static size_t inet6_get_link_af_size(const struct net_device *dev)
4279{
4280 if (!__in6_dev_get(dev))
4281 return 0;
4282
4283 return inet6_ifla6_size();
4284}
4285
4286static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev)
4287{
4288 struct inet6_dev *idev = __in6_dev_get(dev);
4289
4290 if (!idev)
4291 return -ENODATA;
4292
4293 if (inet6_fill_ifla6_attrs(skb, idev) < 0)
4294 return -EMSGSIZE;
4295
4296 return 0;
4297}
4298
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004299static int inet6_set_iftoken(struct inet6_dev *idev, struct in6_addr *token)
4300{
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004301 struct inet6_ifaddr *ifp;
4302 struct net_device *dev = idev->dev;
Daniel Borkmannfc403832013-04-09 03:47:15 +00004303 bool update_rs = false;
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004304
4305 if (token == NULL)
4306 return -EINVAL;
4307 if (ipv6_addr_any(token))
4308 return -EINVAL;
4309 if (dev->flags & (IFF_LOOPBACK | IFF_NOARP))
4310 return -EINVAL;
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004311 if (!ipv6_accept_ra(idev))
4312 return -EINVAL;
4313 if (idev->cnf.rtr_solicits <= 0)
4314 return -EINVAL;
4315
4316 write_lock_bh(&idev->lock);
4317
4318 BUILD_BUG_ON(sizeof(token->s6_addr) != 16);
4319 memcpy(idev->token.s6_addr + 8, token->s6_addr + 8, 8);
4320
4321 write_unlock_bh(&idev->lock);
4322
Daniel Borkmannfc403832013-04-09 03:47:15 +00004323 if (!idev->dead && (idev->if_flags & IF_READY)) {
4324 struct in6_addr ll_addr;
4325
4326 ipv6_get_lladdr(dev, &ll_addr, IFA_F_TENTATIVE |
4327 IFA_F_OPTIMISTIC);
4328
4329 /* If we're not ready, then normal ifup will take care
4330 * of this. Otherwise, we need to request our rs here.
4331 */
4332 ndisc_send_rs(dev, &ll_addr, &in6addr_linklocal_allrouters);
4333 update_rs = true;
4334 }
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004335
4336 write_lock_bh(&idev->lock);
Daniel Borkmannfc403832013-04-09 03:47:15 +00004337
4338 if (update_rs)
4339 idev->if_flags |= IF_RS_SENT;
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004340
4341 /* Well, that's kinda nasty ... */
4342 list_for_each_entry(ifp, &idev->addr_list, if_list) {
4343 spin_lock(&ifp->lock);
Daniel Borkmann617fe292013-04-09 03:47:16 +00004344 if (ifp->tokenized) {
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004345 ifp->valid_lft = 0;
4346 ifp->prefered_lft = 0;
4347 }
4348 spin_unlock(&ifp->lock);
4349 }
4350
4351 write_unlock_bh(&idev->lock);
4352 return 0;
4353}
4354
4355static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla)
4356{
4357 int err = -EINVAL;
4358 struct inet6_dev *idev = __in6_dev_get(dev);
4359 struct nlattr *tb[IFLA_INET6_MAX + 1];
4360
4361 if (!idev)
4362 return -EAFNOSUPPORT;
4363
4364 if (nla_parse_nested(tb, IFLA_INET6_MAX, nla, NULL) < 0)
4365 BUG();
4366
4367 if (tb[IFLA_INET6_TOKEN])
4368 err = inet6_set_iftoken(idev, nla_data(tb[IFLA_INET6_TOKEN]));
4369
4370 return err;
4371}
4372
Thomas Grafb382b192010-11-16 04:33:57 +00004373static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004374 u32 portid, u32 seq, int event, unsigned int flags)
Thomas Grafb382b192010-11-16 04:33:57 +00004375{
4376 struct net_device *dev = idev->dev;
4377 struct ifinfomsg *hdr;
4378 struct nlmsghdr *nlh;
4379 void *protoinfo;
4380
Eric W. Biederman15e47302012-09-07 20:12:54 +00004381 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*hdr), flags);
Thomas Grafb382b192010-11-16 04:33:57 +00004382 if (nlh == NULL)
4383 return -EMSGSIZE;
4384
4385 hdr = nlmsg_data(nlh);
4386 hdr->ifi_family = AF_INET6;
4387 hdr->__ifi_pad = 0;
4388 hdr->ifi_type = dev->type;
4389 hdr->ifi_index = dev->ifindex;
4390 hdr->ifi_flags = dev_get_flags(dev);
4391 hdr->ifi_change = 0;
4392
David S. Millerc78679e2012-04-01 20:27:33 -04004393 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
4394 (dev->addr_len &&
4395 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
4396 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
4397 (dev->ifindex != dev->iflink &&
4398 nla_put_u32(skb, IFLA_LINK, dev->iflink)))
4399 goto nla_put_failure;
Thomas Grafb382b192010-11-16 04:33:57 +00004400 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
4401 if (protoinfo == NULL)
4402 goto nla_put_failure;
4403
4404 if (inet6_fill_ifla6_attrs(skb, idev) < 0)
4405 goto nla_put_failure;
4406
Thomas Graf04561c12006-11-14 19:53:58 -08004407 nla_nest_end(skb, protoinfo);
4408 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004409
Thomas Graf04561c12006-11-14 19:53:58 -08004410nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -08004411 nlmsg_cancel(skb, nlh);
4412 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004413}
4414
4415static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
4416{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09004417 struct net *net = sock_net(skb->sk);
Eric Dumazet84d26972009-11-09 12:11:28 +00004418 int h, s_h;
David S. Miller434a8a582009-11-11 18:53:00 -08004419 int idx = 0, s_idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004420 struct net_device *dev;
4421 struct inet6_dev *idev;
Eric Dumazet84d26972009-11-09 12:11:28 +00004422 struct hlist_head *head;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004423
Eric Dumazet84d26972009-11-09 12:11:28 +00004424 s_h = cb->args[0];
4425 s_idx = cb->args[1];
4426
4427 rcu_read_lock();
4428 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4429 idx = 0;
4430 head = &net->dev_index_head[h];
Sasha Levinb67bfe02013-02-27 17:06:00 -08004431 hlist_for_each_entry_rcu(dev, head, index_hlist) {
Eric Dumazet84d26972009-11-09 12:11:28 +00004432 if (idx < s_idx)
4433 goto cont;
4434 idev = __in6_dev_get(dev);
4435 if (!idev)
4436 goto cont;
4437 if (inet6_fill_ifinfo(skb, idev,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004438 NETLINK_CB(cb->skb).portid,
Eric Dumazet84d26972009-11-09 12:11:28 +00004439 cb->nlh->nlmsg_seq,
4440 RTM_NEWLINK, NLM_F_MULTI) <= 0)
4441 goto out;
Pavel Emelianov7562f872007-05-03 15:13:45 -07004442cont:
Eric Dumazet84d26972009-11-09 12:11:28 +00004443 idx++;
4444 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004445 }
Eric Dumazet84d26972009-11-09 12:11:28 +00004446out:
4447 rcu_read_unlock();
4448 cb->args[1] = idx;
4449 cb->args[0] = h;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004450
4451 return skb->len;
4452}
4453
4454void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
4455{
4456 struct sk_buff *skb;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09004457 struct net *net = dev_net(idev->dev);
Thomas Graf8d7a76c2006-08-15 00:35:47 -07004458 int err = -ENOBUFS;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004459
Thomas Graf339bf982006-11-10 14:10:15 -08004460 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
Thomas Graf8d7a76c2006-08-15 00:35:47 -07004461 if (skb == NULL)
4462 goto errout;
4463
4464 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08004465 if (err < 0) {
4466 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
4467 WARN_ON(err == -EMSGSIZE);
4468 kfree_skb(skb);
4469 goto errout;
4470 }
Nicolas Dichtel5f75a102010-12-07 23:38:31 +00004471 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC);
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -08004472 return;
Thomas Graf8d7a76c2006-08-15 00:35:47 -07004473errout:
4474 if (err < 0)
Nicolas Dichtel5f75a102010-12-07 23:38:31 +00004475 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004476}
4477
Thomas Graf339bf982006-11-10 14:10:15 -08004478static inline size_t inet6_prefix_nlmsg_size(void)
4479{
4480 return NLMSG_ALIGN(sizeof(struct prefixmsg))
4481 + nla_total_size(sizeof(struct in6_addr))
4482 + nla_total_size(sizeof(struct prefix_cacheinfo));
4483}
YOSHIFUJI Hideakic5396a32006-06-17 22:48:48 -07004484
Linus Torvalds1da177e2005-04-16 15:20:36 -07004485static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004486 struct prefix_info *pinfo, u32 portid, u32 seq,
Thomas Graf6051e2f2006-11-14 19:54:19 -08004487 int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004488{
Thomas Graf6051e2f2006-11-14 19:54:19 -08004489 struct prefixmsg *pmsg;
4490 struct nlmsghdr *nlh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004491 struct prefix_cacheinfo ci;
4492
Eric W. Biederman15e47302012-09-07 20:12:54 +00004493 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*pmsg), flags);
Thomas Graf6051e2f2006-11-14 19:54:19 -08004494 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -08004495 return -EMSGSIZE;
Thomas Graf6051e2f2006-11-14 19:54:19 -08004496
4497 pmsg = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004498 pmsg->prefix_family = AF_INET6;
Patrick McHardy8a470772005-06-28 12:56:45 -07004499 pmsg->prefix_pad1 = 0;
4500 pmsg->prefix_pad2 = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004501 pmsg->prefix_ifindex = idev->dev->ifindex;
4502 pmsg->prefix_len = pinfo->prefix_len;
4503 pmsg->prefix_type = pinfo->type;
Patrick McHardy8a470772005-06-28 12:56:45 -07004504 pmsg->prefix_pad3 = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004505 pmsg->prefix_flags = 0;
4506 if (pinfo->onlink)
4507 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
4508 if (pinfo->autoconf)
4509 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
4510
David S. Millerc78679e2012-04-01 20:27:33 -04004511 if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix))
4512 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004513 ci.preferred_time = ntohl(pinfo->prefered);
4514 ci.valid_time = ntohl(pinfo->valid);
David S. Millerc78679e2012-04-01 20:27:33 -04004515 if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci))
4516 goto nla_put_failure;
Thomas Graf6051e2f2006-11-14 19:54:19 -08004517 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004518
Thomas Graf6051e2f2006-11-14 19:54:19 -08004519nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -08004520 nlmsg_cancel(skb, nlh);
4521 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004522}
4523
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004524static void inet6_prefix_notify(int event, struct inet6_dev *idev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004525 struct prefix_info *pinfo)
4526{
4527 struct sk_buff *skb;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09004528 struct net *net = dev_net(idev->dev);
Thomas Graf8c384bfa2006-08-15 00:36:07 -07004529 int err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004530
Thomas Graf339bf982006-11-10 14:10:15 -08004531 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
Thomas Graf8c384bfa2006-08-15 00:36:07 -07004532 if (skb == NULL)
4533 goto errout;
4534
4535 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08004536 if (err < 0) {
4537 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
4538 WARN_ON(err == -EMSGSIZE);
4539 kfree_skb(skb);
4540 goto errout;
4541 }
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -08004542 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
4543 return;
Thomas Graf8c384bfa2006-08-15 00:36:07 -07004544errout:
4545 if (err < 0)
Benjamin Thery6fda7352008-03-05 10:47:47 -08004546 rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004547}
4548
Linus Torvalds1da177e2005-04-16 15:20:36 -07004549static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
4550{
Nicolas Dichtel63998ac2013-03-22 06:28:43 +00004551 struct net *net = dev_net(ifp->idev->dev);
4552
Linus Torvalds1da177e2005-04-16 15:20:36 -07004553 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
4554
4555 switch (event) {
4556 case RTM_NEWADDR:
Neil Horman95c385b2007-04-25 17:08:10 -07004557 /*
4558 * If the address was optimistic
4559 * we inserted the route at the start of
4560 * our DAD process, so we don't need
4561 * to do it again
4562 */
4563 if (!(ifp->rt->rt6i_node))
4564 ip6_ins_rt(ifp->rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004565 if (ifp->idev->cnf.forwarding)
4566 addrconf_join_anycast(ifp);
4567 break;
4568 case RTM_DELADDR:
4569 if (ifp->idev->cnf.forwarding)
4570 addrconf_leave_anycast(ifp);
4571 addrconf_leave_solict(ifp->idev, &ifp->addr);
Changli Gaod8d1f302010-06-10 23:31:35 -07004572 dst_hold(&ifp->rt->dst);
stephen hemminger93fa1592010-04-12 05:41:31 +00004573
David S. Miller73a8bd72011-01-23 23:27:15 -08004574 if (ip6_del_rt(ifp->rt))
Changli Gaod8d1f302010-06-10 23:31:35 -07004575 dst_free(&ifp->rt->dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004576 break;
4577 }
Nicolas Dichtel63998ac2013-03-22 06:28:43 +00004578 atomic_inc(&net->ipv6.dev_addr_genid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004579}
4580
4581static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
4582{
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07004583 rcu_read_lock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004584 if (likely(ifp->idev->dead == 0))
4585 __ipv6_ifa_notify(event, ifp);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07004586 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004587}
4588
4589#ifdef CONFIG_SYSCTL
4590
4591static
Alexey Dobriyan8d65af72009-09-23 15:57:19 -07004592int addrconf_sysctl_forward(ctl_table *ctl, int write,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004593 void __user *buffer, size_t *lenp, loff_t *ppos)
4594{
4595 int *valp = ctl->data;
4596 int val = *valp;
Eric W. Biederman88af1822010-02-19 13:22:59 +00004597 loff_t pos = *ppos;
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00004598 ctl_table lctl;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004599 int ret;
4600
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00004601 /*
4602 * ctl->data points to idev->cnf.forwarding, we should
4603 * not modify it until we get the rtnl lock.
4604 */
4605 lctl = *ctl;
4606 lctl.data = &val;
4607
4608 ret = proc_dointvec(&lctl, write, buffer, lenp, ppos);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004609
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -08004610 if (write)
Stephen Hemmingerb325fdd2009-02-26 06:55:31 +00004611 ret = addrconf_fixup_forwarding(ctl, valp, val);
Eric W. Biederman88af1822010-02-19 13:22:59 +00004612 if (ret)
4613 *ppos = pos;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004614 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004615}
4616
Brian Haley56d417b2009-06-01 03:07:33 -07004617static void dev_disable_change(struct inet6_dev *idev)
4618{
4619 if (!idev || !idev->dev)
4620 return;
4621
4622 if (idev->cnf.disable_ipv6)
4623 addrconf_notify(NULL, NETDEV_DOWN, idev->dev);
4624 else
4625 addrconf_notify(NULL, NETDEV_UP, idev->dev);
4626}
4627
4628static void addrconf_disable_change(struct net *net, __s32 newf)
4629{
4630 struct net_device *dev;
4631 struct inet6_dev *idev;
4632
Eric Dumazetc6d14c82009-11-04 05:43:23 -08004633 rcu_read_lock();
4634 for_each_netdev_rcu(net, dev) {
Brian Haley56d417b2009-06-01 03:07:33 -07004635 idev = __in6_dev_get(dev);
4636 if (idev) {
4637 int changed = (!idev->cnf.disable_ipv6) ^ (!newf);
4638 idev->cnf.disable_ipv6 = newf;
4639 if (changed)
4640 dev_disable_change(idev);
4641 }
Brian Haley56d417b2009-06-01 03:07:33 -07004642 }
Eric Dumazetc6d14c82009-11-04 05:43:23 -08004643 rcu_read_unlock();
Brian Haley56d417b2009-06-01 03:07:33 -07004644}
4645
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00004646static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf)
Brian Haley56d417b2009-06-01 03:07:33 -07004647{
4648 struct net *net;
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00004649 int old;
4650
4651 if (!rtnl_trylock())
4652 return restart_syscall();
Brian Haley56d417b2009-06-01 03:07:33 -07004653
4654 net = (struct net *)table->extra2;
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00004655 old = *p;
4656 *p = newf;
Brian Haley56d417b2009-06-01 03:07:33 -07004657
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00004658 if (p == &net->ipv6.devconf_dflt->disable_ipv6) {
4659 rtnl_unlock();
Brian Haley56d417b2009-06-01 03:07:33 -07004660 return 0;
Eric W. Biederman88af1822010-02-19 13:22:59 +00004661 }
Brian Haley56d417b2009-06-01 03:07:33 -07004662
4663 if (p == &net->ipv6.devconf_all->disable_ipv6) {
Brian Haley56d417b2009-06-01 03:07:33 -07004664 net->ipv6.devconf_dflt->disable_ipv6 = newf;
4665 addrconf_disable_change(net, newf);
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00004666 } else if ((!newf) ^ (!old))
Brian Haley56d417b2009-06-01 03:07:33 -07004667 dev_disable_change((struct inet6_dev *)table->extra1);
4668
4669 rtnl_unlock();
4670 return 0;
4671}
4672
4673static
Alexey Dobriyan8d65af72009-09-23 15:57:19 -07004674int addrconf_sysctl_disable(ctl_table *ctl, int write,
Brian Haley56d417b2009-06-01 03:07:33 -07004675 void __user *buffer, size_t *lenp, loff_t *ppos)
4676{
4677 int *valp = ctl->data;
4678 int val = *valp;
Eric W. Biederman88af1822010-02-19 13:22:59 +00004679 loff_t pos = *ppos;
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00004680 ctl_table lctl;
Brian Haley56d417b2009-06-01 03:07:33 -07004681 int ret;
4682
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00004683 /*
4684 * ctl->data points to idev->cnf.disable_ipv6, we should
4685 * not modify it until we get the rtnl lock.
4686 */
4687 lctl = *ctl;
4688 lctl.data = &val;
4689
4690 ret = proc_dointvec(&lctl, write, buffer, lenp, ppos);
Brian Haley56d417b2009-06-01 03:07:33 -07004691
4692 if (write)
4693 ret = addrconf_disable_ipv6(ctl, valp, val);
Eric W. Biederman88af1822010-02-19 13:22:59 +00004694 if (ret)
4695 *ppos = pos;
Brian Haley56d417b2009-06-01 03:07:33 -07004696 return ret;
4697}
4698
Linus Torvalds1da177e2005-04-16 15:20:36 -07004699static struct addrconf_sysctl_table
4700{
4701 struct ctl_table_header *sysctl_header;
YOSHIFUJI Hideakif6a07b22008-03-25 00:25:11 +09004702 ctl_table addrconf_vars[DEVCONF_MAX+1];
Brian Haleyab32ea52006-09-22 14:15:41 -07004703} addrconf_sysctl __read_mostly = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004704 .sysctl_header = NULL,
4705 .addrconf_vars = {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004706 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004707 .procname = "forwarding",
4708 .data = &ipv6_devconf.forwarding,
4709 .maxlen = sizeof(int),
4710 .mode = 0644,
4711 .proc_handler = addrconf_sysctl_forward,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004712 },
4713 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004714 .procname = "hop_limit",
4715 .data = &ipv6_devconf.hop_limit,
4716 .maxlen = sizeof(int),
4717 .mode = 0644,
4718 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004719 },
4720 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004721 .procname = "mtu",
4722 .data = &ipv6_devconf.mtu6,
4723 .maxlen = sizeof(int),
4724 .mode = 0644,
4725 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004726 },
4727 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004728 .procname = "accept_ra",
4729 .data = &ipv6_devconf.accept_ra,
4730 .maxlen = sizeof(int),
4731 .mode = 0644,
4732 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004733 },
4734 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004735 .procname = "accept_redirects",
4736 .data = &ipv6_devconf.accept_redirects,
4737 .maxlen = sizeof(int),
4738 .mode = 0644,
4739 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004740 },
4741 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004742 .procname = "autoconf",
4743 .data = &ipv6_devconf.autoconf,
4744 .maxlen = sizeof(int),
4745 .mode = 0644,
4746 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004747 },
4748 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004749 .procname = "dad_transmits",
4750 .data = &ipv6_devconf.dad_transmits,
4751 .maxlen = sizeof(int),
4752 .mode = 0644,
4753 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004754 },
4755 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004756 .procname = "router_solicitations",
4757 .data = &ipv6_devconf.rtr_solicits,
4758 .maxlen = sizeof(int),
4759 .mode = 0644,
4760 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004761 },
4762 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004763 .procname = "router_solicitation_interval",
4764 .data = &ipv6_devconf.rtr_solicit_interval,
4765 .maxlen = sizeof(int),
4766 .mode = 0644,
4767 .proc_handler = proc_dointvec_jiffies,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004768 },
4769 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004770 .procname = "router_solicitation_delay",
4771 .data = &ipv6_devconf.rtr_solicit_delay,
4772 .maxlen = sizeof(int),
4773 .mode = 0644,
4774 .proc_handler = proc_dointvec_jiffies,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004775 },
4776 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004777 .procname = "force_mld_version",
4778 .data = &ipv6_devconf.force_mld_version,
4779 .maxlen = sizeof(int),
4780 .mode = 0644,
4781 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004782 },
4783#ifdef CONFIG_IPV6_PRIVACY
4784 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004785 .procname = "use_tempaddr",
4786 .data = &ipv6_devconf.use_tempaddr,
4787 .maxlen = sizeof(int),
4788 .mode = 0644,
4789 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004790 },
4791 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004792 .procname = "temp_valid_lft",
4793 .data = &ipv6_devconf.temp_valid_lft,
4794 .maxlen = sizeof(int),
4795 .mode = 0644,
4796 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004797 },
4798 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004799 .procname = "temp_prefered_lft",
4800 .data = &ipv6_devconf.temp_prefered_lft,
4801 .maxlen = sizeof(int),
4802 .mode = 0644,
4803 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004804 },
4805 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004806 .procname = "regen_max_retry",
4807 .data = &ipv6_devconf.regen_max_retry,
4808 .maxlen = sizeof(int),
4809 .mode = 0644,
4810 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004811 },
4812 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004813 .procname = "max_desync_factor",
4814 .data = &ipv6_devconf.max_desync_factor,
4815 .maxlen = sizeof(int),
4816 .mode = 0644,
4817 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004818 },
4819#endif
4820 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004821 .procname = "max_addresses",
4822 .data = &ipv6_devconf.max_addresses,
4823 .maxlen = sizeof(int),
4824 .mode = 0644,
4825 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004826 },
4827 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004828 .procname = "accept_ra_defrtr",
4829 .data = &ipv6_devconf.accept_ra_defrtr,
4830 .maxlen = sizeof(int),
4831 .mode = 0644,
4832 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -08004833 },
4834 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004835 .procname = "accept_ra_pinfo",
4836 .data = &ipv6_devconf.accept_ra_pinfo,
4837 .maxlen = sizeof(int),
4838 .mode = 0644,
4839 .proc_handler = proc_dointvec,
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -08004840 },
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08004841#ifdef CONFIG_IPV6_ROUTER_PREF
4842 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004843 .procname = "accept_ra_rtr_pref",
4844 .data = &ipv6_devconf.accept_ra_rtr_pref,
4845 .maxlen = sizeof(int),
4846 .mode = 0644,
4847 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08004848 },
YOSHIFUJI Hideaki52e16352006-03-20 17:05:47 -08004849 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004850 .procname = "router_probe_interval",
4851 .data = &ipv6_devconf.rtr_probe_interval,
4852 .maxlen = sizeof(int),
4853 .mode = 0644,
4854 .proc_handler = proc_dointvec_jiffies,
YOSHIFUJI Hideaki52e16352006-03-20 17:05:47 -08004855 },
Neil Hormanfa03ef32007-01-30 14:30:10 -08004856#ifdef CONFIG_IPV6_ROUTE_INFO
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -08004857 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004858 .procname = "accept_ra_rt_info_max_plen",
4859 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
4860 .maxlen = sizeof(int),
4861 .mode = 0644,
4862 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -08004863 },
4864#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08004865#endif
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -08004866 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004867 .procname = "proxy_ndp",
4868 .data = &ipv6_devconf.proxy_ndp,
4869 .maxlen = sizeof(int),
4870 .mode = 0644,
4871 .proc_handler = proc_dointvec,
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -07004872 },
4873 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004874 .procname = "accept_source_route",
4875 .data = &ipv6_devconf.accept_source_route,
4876 .maxlen = sizeof(int),
4877 .mode = 0644,
4878 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -07004879 },
Neil Horman95c385b2007-04-25 17:08:10 -07004880#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4881 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004882 .procname = "optimistic_dad",
4883 .data = &ipv6_devconf.optimistic_dad,
4884 .maxlen = sizeof(int),
4885 .mode = 0644,
4886 .proc_handler = proc_dointvec,
Neil Horman95c385b2007-04-25 17:08:10 -07004887
4888 },
4889#endif
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09004890#ifdef CONFIG_IPV6_MROUTE
4891 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004892 .procname = "mc_forwarding",
4893 .data = &ipv6_devconf.mc_forwarding,
4894 .maxlen = sizeof(int),
4895 .mode = 0444,
4896 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09004897 },
4898#endif
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -07004899 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004900 .procname = "disable_ipv6",
4901 .data = &ipv6_devconf.disable_ipv6,
4902 .maxlen = sizeof(int),
4903 .mode = 0644,
4904 .proc_handler = addrconf_sysctl_disable,
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +09004905 },
4906 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004907 .procname = "accept_dad",
4908 .data = &ipv6_devconf.accept_dad,
4909 .maxlen = sizeof(int),
4910 .mode = 0644,
4911 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09004912 },
4913 {
Octavian Purdilaf7734fd2009-10-02 11:39:15 +00004914 .procname = "force_tllao",
4915 .data = &ipv6_devconf.force_tllao,
4916 .maxlen = sizeof(int),
4917 .mode = 0644,
4918 .proc_handler = proc_dointvec
4919 },
4920 {
Hannes Frederic Sowa5cb04432012-11-06 16:46:20 +00004921 .procname = "ndisc_notify",
4922 .data = &ipv6_devconf.ndisc_notify,
4923 .maxlen = sizeof(int),
4924 .mode = 0644,
4925 .proc_handler = proc_dointvec
4926 },
4927 {
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08004928 /* sentinel */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004929 }
4930 },
Linus Torvalds1da177e2005-04-16 15:20:36 -07004931};
4932
Pavel Emelyanovbff16c22008-01-10 17:42:13 -08004933static int __addrconf_sysctl_register(struct net *net, char *dev_name,
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08004934 struct inet6_dev *idev, struct ipv6_devconf *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004935{
4936 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004937 struct addrconf_sysctl_table *t;
Eric W. Biederman6105e292012-04-19 13:41:24 +00004938 char path[sizeof("net/ipv6/conf/") + IFNAMSIZ];
Pavel Emelyanov1dab6222007-12-02 00:59:38 +11004939
Arnaldo Carvalho de Meloaf879cc2006-11-17 12:14:37 -02004940 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004941 if (t == NULL)
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11004942 goto out;
4943
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07004944 for (i = 0; t->addrconf_vars[i].data; i++) {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004945 t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004946 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
Pavel Emelyanovbff16c22008-01-10 17:42:13 -08004947 t->addrconf_vars[i].extra2 = net;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004948 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004949
Eric W. Biederman6105e292012-04-19 13:41:24 +00004950 snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004951
Eric W. Biederman6105e292012-04-19 13:41:24 +00004952 t->sysctl_header = register_net_sysctl(net, path, t->addrconf_vars);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004953 if (t->sysctl_header == NULL)
Eric W. Biederman6105e292012-04-19 13:41:24 +00004954 goto free;
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11004955
4956 p->sysctl = t;
Pavel Emelyanov95897312008-01-10 17:41:45 -08004957 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004958
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11004959free:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004960 kfree(t);
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11004961out:
Pavel Emelyanov95897312008-01-10 17:41:45 -08004962 return -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004963}
4964
Pavel Emelyanov408c4762008-01-10 17:41:21 -08004965static void __addrconf_sysctl_unregister(struct ipv6_devconf *p)
4966{
4967 struct addrconf_sysctl_table *t;
4968
4969 if (p->sysctl == NULL)
4970 return;
4971
4972 t = p->sysctl;
4973 p->sysctl = NULL;
Lucian Adrian Grijincuff538812011-05-01 01:44:01 +00004974 unregister_net_sysctl_table(t->sysctl_header);
Pavel Emelyanov408c4762008-01-10 17:41:21 -08004975 kfree(t);
4976}
4977
Pavel Emelyanovf52295a2007-12-02 00:58:37 +11004978static void addrconf_sysctl_register(struct inet6_dev *idev)
4979{
Eric W. Biederman54716e32010-02-14 03:27:03 +00004980 neigh_sysctl_register(idev->dev, idev->nd_parms, "ipv6",
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08004981 &ndisc_ifinfo_sysctl_change);
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09004982 __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name,
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08004983 idev, &idev->cnf);
Pavel Emelyanovf52295a2007-12-02 00:58:37 +11004984}
4985
Pavel Emelyanov408c4762008-01-10 17:41:21 -08004986static void addrconf_sysctl_unregister(struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004987{
Pavel Emelyanov408c4762008-01-10 17:41:21 -08004988 __addrconf_sysctl_unregister(&idev->cnf);
4989 neigh_sysctl_unregister(idev->nd_parms);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004990}
4991
4992
4993#endif
4994
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00004995static int __net_init addrconf_init_net(struct net *net)
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08004996{
Hong Zhiguoa79ca222013-03-26 01:52:45 +08004997 int err = -ENOMEM;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08004998 struct ipv6_devconf *all, *dflt;
4999
Hong Zhiguoa79ca222013-03-26 01:52:45 +08005000 all = kmemdup(&ipv6_devconf, sizeof(ipv6_devconf), GFP_KERNEL);
5001 if (all == NULL)
5002 goto err_alloc_all;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005003
Hong Zhiguoa79ca222013-03-26 01:52:45 +08005004 dflt = kmemdup(&ipv6_devconf_dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL);
5005 if (dflt == NULL)
5006 goto err_alloc_dflt;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005007
Hong Zhiguoa79ca222013-03-26 01:52:45 +08005008 /* these will be inherited by all namespaces */
5009 dflt->autoconf = ipv6_defaults.autoconf;
5010 dflt->disable_ipv6 = ipv6_defaults.disable_ipv6;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005011
5012 net->ipv6.devconf_all = all;
5013 net->ipv6.devconf_dflt = dflt;
5014
5015#ifdef CONFIG_SYSCTL
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08005016 err = __addrconf_sysctl_register(net, "all", NULL, all);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005017 if (err < 0)
5018 goto err_reg_all;
5019
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08005020 err = __addrconf_sysctl_register(net, "default", NULL, dflt);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005021 if (err < 0)
5022 goto err_reg_dflt;
5023#endif
5024 return 0;
5025
5026#ifdef CONFIG_SYSCTL
5027err_reg_dflt:
5028 __addrconf_sysctl_unregister(all);
5029err_reg_all:
5030 kfree(dflt);
5031#endif
5032err_alloc_dflt:
5033 kfree(all);
5034err_alloc_all:
5035 return err;
5036}
5037
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00005038static void __net_exit addrconf_exit_net(struct net *net)
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005039{
5040#ifdef CONFIG_SYSCTL
5041 __addrconf_sysctl_unregister(net->ipv6.devconf_dflt);
5042 __addrconf_sysctl_unregister(net->ipv6.devconf_all);
5043#endif
Octavian Purdila09ad9bc2009-11-25 15:14:13 -08005044 if (!net_eq(net, &init_net)) {
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005045 kfree(net->ipv6.devconf_dflt);
5046 kfree(net->ipv6.devconf_all);
5047 }
5048}
5049
5050static struct pernet_operations addrconf_ops = {
5051 .init = addrconf_init_net,
5052 .exit = addrconf_exit_net,
5053};
5054
Thomas Grafb382b192010-11-16 04:33:57 +00005055static struct rtnl_af_ops inet6_ops = {
5056 .family = AF_INET6,
5057 .fill_link_af = inet6_fill_link_af,
5058 .get_link_af_size = inet6_get_link_af_size,
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005059 .set_link_af = inet6_set_link_af,
Thomas Grafb382b192010-11-16 04:33:57 +00005060};
5061
Linus Torvalds1da177e2005-04-16 15:20:36 -07005062/*
5063 * Init / cleanup code
5064 */
5065
5066int __init addrconf_init(void)
5067{
stephen hemmingerc2e21292010-03-17 20:31:10 +00005068 int i, err;
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +09005069
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005070 err = ipv6_addr_label_init();
5071 if (err < 0) {
Joe Perchesf3213832012-05-15 14:11:53 +00005072 pr_crit("%s: cannot initialize default policy table: %d\n",
5073 __func__, err);
Neil Horman2cc6d2b2010-09-24 09:55:52 +00005074 goto out;
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +09005075 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005076
Neil Horman2cc6d2b2010-09-24 09:55:52 +00005077 err = register_pernet_subsys(&addrconf_ops);
5078 if (err < 0)
5079 goto out_addrlabel;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005080
Linus Torvalds1da177e2005-04-16 15:20:36 -07005081 /* The addrconf netdev notifier requires that loopback_dev
5082 * has it's ipv6 private information allocated and setup
5083 * before it can bring up and give link-local addresses
5084 * to other devices which are up.
5085 *
5086 * Unfortunately, loopback_dev is not necessarily the first
5087 * entry in the global dev_base list of net devices. In fact,
5088 * it is likely to be the very last entry on that list.
5089 * So this causes the notifier registry below to try and
5090 * give link-local addresses to all devices besides loopback_dev
5091 * first, then loopback_dev, which cases all the non-loopback_dev
5092 * devices to fail to get a link-local address.
5093 *
5094 * So, as a temporary fix, allocate the ipv6 structure for
5095 * loopback_dev first by hand.
5096 * Longer term, all of the dependencies ipv6 has upon the loopback
5097 * device and it being up should be removed.
5098 */
5099 rtnl_lock();
Eric W. Biederman2774c7a2007-09-26 22:10:56 -07005100 if (!ipv6_add_dev(init_net.loopback_dev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07005101 err = -ENOMEM;
5102 rtnl_unlock();
5103 if (err)
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005104 goto errlo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005105
stephen hemmingerc2e21292010-03-17 20:31:10 +00005106 for (i = 0; i < IN6_ADDR_HSIZE; i++)
5107 INIT_HLIST_HEAD(&inet6_addr_lst[i]);
5108
Linus Torvalds1da177e2005-04-16 15:20:36 -07005109 register_netdevice_notifier(&ipv6_dev_notf);
5110
Linus Torvalds1da177e2005-04-16 15:20:36 -07005111 addrconf_verify(0);
Thomas Grafc127ea22007-03-22 11:58:32 -07005112
Thomas Grafb382b192010-11-16 04:33:57 +00005113 err = rtnl_af_register(&inet6_ops);
5114 if (err < 0)
5115 goto errout_af;
5116
Greg Rosec7ac8672011-06-10 01:27:09 +00005117 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo,
5118 NULL);
Thomas Grafc127ea22007-03-22 11:58:32 -07005119 if (err < 0)
5120 goto errout;
5121
5122 /* Only the first call to __rtnl_register can fail */
Greg Rosec7ac8672011-06-10 01:27:09 +00005123 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL);
5124 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL);
5125 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr,
5126 inet6_dump_ifaddr, NULL);
5127 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL,
5128 inet6_dump_ifmcaddr, NULL);
5129 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL,
5130 inet6_dump_ifacaddr, NULL);
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +00005131 __rtnl_register(PF_INET6, RTM_GETNETCONF, inet6_netconf_get_devconf,
Nicolas Dichtel7a674202013-03-05 23:42:06 +00005132 inet6_netconf_dump_devconf, NULL);
Thomas Grafc127ea22007-03-22 11:58:32 -07005133
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +09005134 ipv6_addr_label_rtnl_register();
5135
Linus Torvalds1da177e2005-04-16 15:20:36 -07005136 return 0;
Thomas Grafc127ea22007-03-22 11:58:32 -07005137errout:
Thomas Grafb382b192010-11-16 04:33:57 +00005138 rtnl_af_unregister(&inet6_ops);
5139errout_af:
Thomas Grafc127ea22007-03-22 11:58:32 -07005140 unregister_netdevice_notifier(&ipv6_dev_notf);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005141errlo:
5142 unregister_pernet_subsys(&addrconf_ops);
Neil Horman2cc6d2b2010-09-24 09:55:52 +00005143out_addrlabel:
5144 ipv6_addr_label_cleanup();
5145out:
Thomas Grafc127ea22007-03-22 11:58:32 -07005146 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005147}
5148
Daniel Lezcano09f77092007-12-13 05:34:58 -08005149void addrconf_cleanup(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005150{
Daniel Lezcano176c39a2009-03-03 01:06:45 -08005151 struct net_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005152 int i;
5153
5154 unregister_netdevice_notifier(&ipv6_dev_notf);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005155 unregister_pernet_subsys(&addrconf_ops);
Neil Horman2cc6d2b2010-09-24 09:55:52 +00005156 ipv6_addr_label_cleanup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07005157
5158 rtnl_lock();
5159
Thomas Grafb382b192010-11-16 04:33:57 +00005160 __rtnl_af_unregister(&inet6_ops);
5161
Daniel Lezcano176c39a2009-03-03 01:06:45 -08005162 /* clean dev list */
5163 for_each_netdev(&init_net, dev) {
5164 if (__in6_dev_get(dev) == NULL)
5165 continue;
5166 addrconf_ifdown(dev, 1);
5167 }
5168 addrconf_ifdown(init_net.loopback_dev, 2);
5169
Linus Torvalds1da177e2005-04-16 15:20:36 -07005170 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07005171 * Check hash table.
5172 */
stephen hemminger5c578ae2010-03-17 20:31:11 +00005173 spin_lock_bh(&addrconf_hash_lock);
stephen hemmingerc2e21292010-03-17 20:31:10 +00005174 for (i = 0; i < IN6_ADDR_HSIZE; i++)
5175 WARN_ON(!hlist_empty(&inet6_addr_lst[i]));
stephen hemminger5c578ae2010-03-17 20:31:11 +00005176 spin_unlock_bh(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005177
5178 del_timer(&addr_chk_timer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005179 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07005180}