blob: b78a3ee93d52b655426a07a4278c46c09f8e31be [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 hemminger5c578aed2010-03-17 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 Hideaki52e163562006-03-20 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 Hideaki52e163562006-03-20 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 Hideaki9625ed722008-04-13 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 hemminger5c578aed2010-03-17 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 hemminger5c578aed2010-03-17 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 hemminger5c578aed2010-03-17 20:31:11 +0000891 hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]);
stephen hemminger5c578aed2010-03-17 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 hemminger5c578aed2010-03-17 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 hemminger5c578aed2010-03-17 20:31:11 +0000941 spin_lock_bh(&addrconf_hash_lock);
942 hlist_del_init_rcu(&ifp->addr_lst);
stephen hemminger5c578aed2010-03-17 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
Hannes Frederic Sowaad558a22013-08-16 13:02:27 +02001127 ift = ipv6_add_addr(idev, &addr, tmp_plen,
1128 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK,
1129 addr_flags);
1130 if (IS_ERR(ift)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 in6_ifa_put(ifp);
1132 in6_dev_put(idev);
Joe Perchesf3213832012-05-15 14:11:53 +00001133 pr_info("%s: retry temporary address regeneration\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134 tmpaddr = &addr;
1135 write_lock(&idev->lock);
1136 goto retry;
1137 }
1138
1139 spin_lock_bh(&ift->lock);
1140 ift->ifpub = ifp;
1141 ift->valid_lft = tmp_valid_lft;
1142 ift->prefered_lft = tmp_prefered_lft;
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00001143 ift->cstamp = now;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144 ift->tstamp = tmp_tstamp;
1145 spin_unlock_bh(&ift->lock);
1146
David S. Millercf22f9a2012-04-14 21:37:40 -04001147 addrconf_dad_start(ift);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148 in6_ifa_put(ift);
1149 in6_dev_put(idev);
1150out:
1151 return ret;
1152}
1153#endif
1154
1155/*
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001156 * Choose an appropriate source address (RFC3484)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001157 */
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001158enum {
1159 IPV6_SADDR_RULE_INIT = 0,
1160 IPV6_SADDR_RULE_LOCAL,
1161 IPV6_SADDR_RULE_SCOPE,
1162 IPV6_SADDR_RULE_PREFERRED,
1163#ifdef CONFIG_IPV6_MIP6
1164 IPV6_SADDR_RULE_HOA,
1165#endif
1166 IPV6_SADDR_RULE_OIF,
1167 IPV6_SADDR_RULE_LABEL,
1168#ifdef CONFIG_IPV6_PRIVACY
1169 IPV6_SADDR_RULE_PRIVACY,
1170#endif
1171 IPV6_SADDR_RULE_ORCHID,
1172 IPV6_SADDR_RULE_PREFIX,
1173 IPV6_SADDR_RULE_MAX
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001174};
1175
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001176struct ipv6_saddr_score {
1177 int rule;
1178 int addr_type;
1179 struct inet6_ifaddr *ifa;
1180 DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX);
1181 int scopedist;
1182 int matchlen;
1183};
1184
1185struct ipv6_saddr_dst {
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +09001186 const struct in6_addr *addr;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001187 int ifindex;
1188 int scope;
1189 int label;
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001190 unsigned int prefs;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001191};
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001192
Dave Jonesb6f99a22007-03-22 12:27:49 -07001193static inline int ipv6_saddr_preferred(int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194{
Ulrich Weber45bb0062010-02-25 23:28:58 +00001195 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK))
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001196 return 1;
1197 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198}
1199
Benjamin Thery3de23252008-05-28 14:51:24 +02001200static int ipv6_get_saddr_eval(struct net *net,
1201 struct ipv6_saddr_score *score,
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001202 struct ipv6_saddr_dst *dst,
1203 int i)
1204{
1205 int ret;
1206
1207 if (i <= score->rule) {
1208 switch (i) {
1209 case IPV6_SADDR_RULE_SCOPE:
1210 ret = score->scopedist;
1211 break;
1212 case IPV6_SADDR_RULE_PREFIX:
1213 ret = score->matchlen;
1214 break;
1215 default:
1216 ret = !!test_bit(i, score->scorebits);
1217 }
1218 goto out;
1219 }
1220
1221 switch (i) {
1222 case IPV6_SADDR_RULE_INIT:
1223 /* Rule 0: remember if hiscore is not ready yet */
1224 ret = !!score->ifa;
1225 break;
1226 case IPV6_SADDR_RULE_LOCAL:
1227 /* Rule 1: Prefer same address */
1228 ret = ipv6_addr_equal(&score->ifa->addr, dst->addr);
1229 break;
1230 case IPV6_SADDR_RULE_SCOPE:
1231 /* Rule 2: Prefer appropriate scope
1232 *
1233 * ret
1234 * ^
1235 * -1 | d 15
1236 * ---+--+-+---> scope
1237 * |
1238 * | d is scope of the destination.
1239 * B-d | \
1240 * | \ <- smaller scope is better if
1241 * B-15 | \ if scope is enough for destinaion.
1242 * | ret = B - scope (-1 <= scope >= d <= 15).
1243 * d-C-1 | /
1244 * |/ <- greater is better
1245 * -C / if scope is not enough for destination.
1246 * /| ret = scope - C (-1 <= d < scope <= 15).
1247 *
1248 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1249 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1250 * Assume B = 0 and we get C > 29.
1251 */
1252 ret = __ipv6_addr_src_scope(score->addr_type);
1253 if (ret >= dst->scope)
1254 ret = -ret;
1255 else
1256 ret -= 128; /* 30 is enough */
1257 score->scopedist = ret;
1258 break;
1259 case IPV6_SADDR_RULE_PREFERRED:
1260 /* Rule 3: Avoid deprecated and optimistic addresses */
1261 ret = ipv6_saddr_preferred(score->addr_type) ||
1262 !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC));
1263 break;
1264#ifdef CONFIG_IPV6_MIP6
1265 case IPV6_SADDR_RULE_HOA:
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001266 {
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001267 /* Rule 4: Prefer home address */
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001268 int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA);
1269 ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001270 break;
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001271 }
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001272#endif
1273 case IPV6_SADDR_RULE_OIF:
1274 /* Rule 5: Prefer outgoing interface */
1275 ret = (!dst->ifindex ||
1276 dst->ifindex == score->ifa->idev->dev->ifindex);
1277 break;
1278 case IPV6_SADDR_RULE_LABEL:
1279 /* Rule 6: Prefer matching label */
Benjamin Thery3de23252008-05-28 14:51:24 +02001280 ret = ipv6_addr_label(net,
1281 &score->ifa->addr, score->addr_type,
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001282 score->ifa->idev->dev->ifindex) == dst->label;
1283 break;
1284#ifdef CONFIG_IPV6_PRIVACY
1285 case IPV6_SADDR_RULE_PRIVACY:
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001286 {
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001287 /* Rule 7: Prefer public address
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001288 * Note: prefer temporary address if use_tempaddr >= 2
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001289 */
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001290 int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ?
1291 !!(dst->prefs & IPV6_PREFER_SRC_TMP) :
1292 score->ifa->idev->cnf.use_tempaddr >= 2;
1293 ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001294 break;
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001295 }
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001296#endif
1297 case IPV6_SADDR_RULE_ORCHID:
1298 /* Rule 8-: Prefer ORCHID vs ORCHID or
1299 * non-ORCHID vs non-ORCHID
1300 */
1301 ret = !(ipv6_addr_orchid(&score->ifa->addr) ^
1302 ipv6_addr_orchid(dst->addr));
1303 break;
1304 case IPV6_SADDR_RULE_PREFIX:
1305 /* Rule 8: Use longest matching prefix */
YOSHIFUJI Hideaki / 吉藤英明91b4b042012-09-10 18:41:07 +00001306 ret = ipv6_addr_diff(&score->ifa->addr, dst->addr);
1307 if (ret > score->ifa->prefix_len)
1308 ret = score->ifa->prefix_len;
1309 score->matchlen = ret;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001310 break;
1311 default:
1312 ret = 0;
1313 }
1314
1315 if (ret)
1316 __set_bit(i, score->scorebits);
1317 score->rule = i;
1318out:
1319 return ret;
1320}
1321
Patrick McHardyb3f644f2012-08-26 19:14:14 +02001322int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +09001323 const struct in6_addr *daddr, unsigned int prefs,
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001324 struct in6_addr *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325{
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001326 struct ipv6_saddr_score scores[2],
1327 *score = &scores[0], *hiscore = &scores[1];
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001328 struct ipv6_saddr_dst dst;
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001329 struct net_device *dev;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001330 int dst_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001331
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001332 dst_type = __ipv6_addr_type(daddr);
1333 dst.addr = daddr;
1334 dst.ifindex = dst_dev ? dst_dev->ifindex : 0;
1335 dst.scope = __ipv6_addr_src_scope(dst_type);
Benjamin Thery3de23252008-05-28 14:51:24 +02001336 dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex);
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001337 dst.prefs = prefs;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001338
1339 hiscore->rule = -1;
1340 hiscore->ifa = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001341
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001342 rcu_read_lock();
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001343
Eric Dumazetc6d14c82009-11-04 05:43:23 -08001344 for_each_netdev_rcu(net, dev) {
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001345 struct inet6_dev *idev;
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001346
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001347 /* Candidate Source Address (section 4)
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001348 * - multicast and link-local destination address,
1349 * the set of candidate source address MUST only
1350 * include addresses assigned to interfaces
1351 * belonging to the same link as the outgoing
1352 * interface.
1353 * (- For site-local destination addresses, the
1354 * set of candidate source addresses MUST only
1355 * include addresses assigned to interfaces
1356 * belonging to the same site as the outgoing
1357 * interface.)
1358 */
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001359 if (((dst_type & IPV6_ADDR_MULTICAST) ||
1360 dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
1361 dst.ifindex && dev->ifindex != dst.ifindex)
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001362 continue;
1363
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364 idev = __in6_dev_get(dev);
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001365 if (!idev)
1366 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001367
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001368 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00001369 list_for_each_entry(score->ifa, &idev->addr_list, if_list) {
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001370 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001372 /*
YOSHIFUJI Hideaki6b3ae802005-12-21 22:58:01 +09001373 * - Tentative Address (RFC2462 section 5.4)
1374 * - A tentative address is not considered
1375 * "assigned to an interface" in the traditional
Neil Horman95c385b2007-04-25 17:08:10 -07001376 * sense, unless it is also flagged as optimistic.
YOSHIFUJI Hideaki6b3ae802005-12-21 22:58:01 +09001377 * - Candidate Source Address (section 4)
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001378 * - In any case, anycast addresses, multicast
1379 * addresses, and the unspecified address MUST
1380 * NOT be included in a candidate set.
1381 */
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001382 if ((score->ifa->flags & IFA_F_TENTATIVE) &&
1383 (!(score->ifa->flags & IFA_F_OPTIMISTIC)))
YOSHIFUJI Hideaki6b3ae802005-12-21 22:58:01 +09001384 continue;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001385
1386 score->addr_type = __ipv6_addr_type(&score->ifa->addr);
1387
1388 if (unlikely(score->addr_type == IPV6_ADDR_ANY ||
1389 score->addr_type & IPV6_ADDR_MULTICAST)) {
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001390 LIMIT_NETDEBUG(KERN_DEBUG
Joe Perches3b6d821c2007-11-19 23:47:25 -08001391 "ADDRCONF: unspecified / multicast address "
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001392 "assigned as unicast address on %s",
1393 dev->name);
1394 continue;
1395 }
1396
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001397 score->rule = -1;
1398 bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX);
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001399
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001400 for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) {
1401 int minihiscore, miniscore;
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001402
Benjamin Thery3de23252008-05-28 14:51:24 +02001403 minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i);
1404 miniscore = ipv6_get_saddr_eval(net, score, &dst, i);
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001405
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001406 if (minihiscore > miniscore) {
1407 if (i == IPV6_SADDR_RULE_SCOPE &&
1408 score->scopedist > 0) {
1409 /*
1410 * special case:
1411 * each remaining entry
1412 * has too small (not enough)
1413 * scope, because ifa entries
1414 * are sorted by their scope
1415 * values.
1416 */
1417 goto try_nextdev;
1418 }
1419 break;
1420 } else if (minihiscore < miniscore) {
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001421 if (hiscore->ifa)
1422 in6_ifa_put(hiscore->ifa);
1423
1424 in6_ifa_hold(score->ifa);
1425
Ilpo Järvinena0bffff2009-03-21 13:36:17 -07001426 swap(hiscore, score);
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001427
1428 /* restore our iterator */
1429 score->ifa = hiscore->ifa;
1430
1431 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001432 }
1433 }
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001434 }
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001435try_nextdev:
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001436 read_unlock_bh(&idev->lock);
1437 }
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001438 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001439
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001440 if (!hiscore->ifa)
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001441 return -EADDRNOTAVAIL;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001442
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +00001443 *saddr = hiscore->ifa->addr;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001444 in6_ifa_put(hiscore->ifa);
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001445 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446}
YOSHIFUJI Hideaki5e5f3f02008-03-03 21:44:34 +09001447EXPORT_SYMBOL(ipv6_dev_get_saddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448
Amerigo Wang36bddba2013-06-29 21:30:49 +08001449int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr,
1450 unsigned char banned_flags)
1451{
1452 struct inet6_ifaddr *ifp;
1453 int err = -EADDRNOTAVAIL;
1454
1455 list_for_each_entry(ifp, &idev->addr_list, if_list) {
1456 if (ifp->scope == IFA_LINK &&
1457 !(ifp->flags & banned_flags)) {
1458 *addr = ifp->addr;
1459 err = 0;
1460 break;
1461 }
1462 }
1463 return err;
1464}
1465
Neil Horman95c385b2007-04-25 17:08:10 -07001466int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
1467 unsigned char banned_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001468{
1469 struct inet6_dev *idev;
1470 int err = -EADDRNOTAVAIL;
1471
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001472 rcu_read_lock();
Stephen Hemmingere21e8462010-03-20 16:09:01 -07001473 idev = __in6_dev_get(dev);
1474 if (idev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001475 read_lock_bh(&idev->lock);
Amerigo Wang36bddba2013-06-29 21:30:49 +08001476 err = __ipv6_get_lladdr(idev, addr, banned_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001477 read_unlock_bh(&idev->lock);
1478 }
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001479 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480 return err;
1481}
1482
1483static int ipv6_count_addresses(struct inet6_dev *idev)
1484{
1485 int cnt = 0;
1486 struct inet6_ifaddr *ifp;
1487
1488 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00001489 list_for_each_entry(ifp, &idev->addr_list, if_list)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001490 cnt++;
1491 read_unlock_bh(&idev->lock);
1492 return cnt;
1493}
1494
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001495int ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
Florian Westphal2a7851b2013-05-17 03:56:10 +00001496 const struct net_device *dev, int strict)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497{
Stephen Hemmingereedf0422010-05-17 22:27:12 -07001498 struct inet6_ifaddr *ifp;
Eric Dumazetddbe5032012-07-18 08:11:12 +00001499 unsigned int hash = inet6_addr_hash(addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001500
stephen hemminger5c578aed2010-03-17 20:31:11 +00001501 rcu_read_lock_bh();
Sasha Levinb67bfe02013-02-27 17:06:00 -08001502 hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09001503 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcanobfeade02008-01-10 22:43:18 -08001504 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001505 if (ipv6_addr_equal(&ifp->addr, addr) &&
Stephen Hemmingereedf0422010-05-17 22:27:12 -07001506 !(ifp->flags&IFA_F_TENTATIVE) &&
1507 (dev == NULL || ifp->idev->dev == dev ||
1508 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) {
1509 rcu_read_unlock_bh();
1510 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001511 }
1512 }
stephen hemminger5c578aed2010-03-17 20:31:11 +00001513
Stephen Hemmingereedf0422010-05-17 22:27:12 -07001514 rcu_read_unlock_bh();
1515 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001516}
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +09001517EXPORT_SYMBOL(ipv6_chk_addr);
1518
David S. Miller3e81c6d2010-03-20 16:18:00 -07001519static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
1520 struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001521{
Eric Dumazetddbe5032012-07-18 08:11:12 +00001522 unsigned int hash = inet6_addr_hash(addr);
stephen hemmingerc2e21292010-03-17 20:31:10 +00001523 struct inet6_ifaddr *ifp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001524
Sasha Levinb67bfe02013-02-27 17:06:00 -08001525 hlist_for_each_entry(ifp, &inet6_addr_lst[hash], addr_lst) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09001526 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcano06bfe652008-01-10 22:43:42 -08001527 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528 if (ipv6_addr_equal(&ifp->addr, addr)) {
1529 if (dev == NULL || ifp->idev->dev == dev)
David S. Miller3e81c6d2010-03-20 16:18:00 -07001530 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001531 }
1532 }
David S. Miller3e81c6d2010-03-20 16:18:00 -07001533 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001534}
1535
Catalin(ux) M. BOIE6ea2edb2013-09-23 23:04:19 +03001536/* Compares an address/prefix_len with addresses on device @dev.
1537 * If one is found it returns true.
1538 */
1539bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
1540 const unsigned int prefix_len, struct net_device *dev)
1541{
1542 struct inet6_dev *idev;
1543 struct inet6_ifaddr *ifa;
1544 bool ret = false;
1545
1546 rcu_read_lock();
1547 idev = __in6_dev_get(dev);
1548 if (idev) {
1549 read_lock_bh(&idev->lock);
1550 list_for_each_entry(ifa, &idev->addr_list, if_list) {
1551 ret = ipv6_prefix_equal(addr, &ifa->addr, prefix_len);
1552 if (ret)
1553 break;
1554 }
1555 read_unlock_bh(&idev->lock);
1556 }
1557 rcu_read_unlock();
1558
1559 return ret;
1560}
1561EXPORT_SYMBOL(ipv6_chk_custom_prefix);
1562
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001563int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev)
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -04001564{
1565 struct inet6_dev *idev;
1566 struct inet6_ifaddr *ifa;
1567 int onlink;
1568
1569 onlink = 0;
1570 rcu_read_lock();
1571 idev = __in6_dev_get(dev);
1572 if (idev) {
1573 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00001574 list_for_each_entry(ifa, &idev->addr_list, if_list) {
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -04001575 onlink = ipv6_prefix_equal(addr, &ifa->addr,
1576 ifa->prefix_len);
1577 if (onlink)
1578 break;
1579 }
1580 read_unlock_bh(&idev->lock);
1581 }
1582 rcu_read_unlock();
1583 return onlink;
1584}
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -04001585EXPORT_SYMBOL(ipv6_chk_prefix);
1586
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +09001587struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr,
Daniel Lezcano1cab3da2008-01-10 22:44:09 -08001588 struct net_device *dev, int strict)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001589{
David S. Millerb79d1d52010-03-25 21:39:21 -07001590 struct inet6_ifaddr *ifp, *result = NULL;
Eric Dumazetddbe5032012-07-18 08:11:12 +00001591 unsigned int hash = inet6_addr_hash(addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001592
stephen hemminger5c578aed2010-03-17 20:31:11 +00001593 rcu_read_lock_bh();
Sasha Levinb67bfe02013-02-27 17:06:00 -08001594 hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09001595 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcano1cab3da2008-01-10 22:44:09 -08001596 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001597 if (ipv6_addr_equal(&ifp->addr, addr)) {
1598 if (dev == NULL || ifp->idev->dev == dev ||
1599 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
David S. Millerb79d1d52010-03-25 21:39:21 -07001600 result = ifp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001601 in6_ifa_hold(ifp);
1602 break;
1603 }
1604 }
1605 }
stephen hemminger5c578aed2010-03-17 20:31:11 +00001606 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001607
David S. Millerb79d1d52010-03-25 21:39:21 -07001608 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001609}
1610
Linus Torvalds1da177e2005-04-16 15:20:36 -07001611/* Gets referenced address, destroys ifaddr */
1612
Brian Haleycc411d02009-09-09 14:41:32 +00001613static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001614{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001615 if (ifp->flags&IFA_F_PERMANENT) {
1616 spin_lock_bh(&ifp->lock);
1617 addrconf_del_timer(ifp);
1618 ifp->flags |= IFA_F_TENTATIVE;
Brian Haleycc411d02009-09-09 14:41:32 +00001619 if (dad_failed)
1620 ifp->flags |= IFA_F_DADFAILED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621 spin_unlock_bh(&ifp->lock);
Herbert Xue2577a02010-03-13 12:23:29 -08001622 if (dad_failed)
1623 ipv6_ifa_notify(0, ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001624 in6_ifa_put(ifp);
1625#ifdef CONFIG_IPV6_PRIVACY
1626 } else if (ifp->flags&IFA_F_TEMPORARY) {
1627 struct inet6_ifaddr *ifpub;
1628 spin_lock_bh(&ifp->lock);
1629 ifpub = ifp->ifpub;
1630 if (ifpub) {
1631 in6_ifa_hold(ifpub);
1632 spin_unlock_bh(&ifp->lock);
1633 ipv6_create_tempaddr(ifpub, ifp);
1634 in6_ifa_put(ifpub);
1635 } else {
1636 spin_unlock_bh(&ifp->lock);
1637 }
1638 ipv6_del_addr(ifp);
1639#endif
1640 } else
1641 ipv6_del_addr(ifp);
1642}
1643
Herbert Xuf2344a12010-05-18 15:55:27 -07001644static int addrconf_dad_end(struct inet6_ifaddr *ifp)
1645{
1646 int err = -ENOENT;
1647
1648 spin_lock(&ifp->state_lock);
1649 if (ifp->state == INET6_IFADDR_STATE_DAD) {
1650 ifp->state = INET6_IFADDR_STATE_POSTDAD;
1651 err = 0;
1652 }
1653 spin_unlock(&ifp->state_lock);
1654
1655 return err;
1656}
1657
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09001658void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1659{
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09001660 struct inet6_dev *idev = ifp->idev;
Brian Haley9bdd8d42009-03-18 18:22:48 -07001661
Ursula Braun853dc2e2010-10-24 23:06:43 +00001662 if (addrconf_dad_end(ifp)) {
1663 in6_ifa_put(ifp);
Herbert Xuf2344a12010-05-18 15:55:27 -07001664 return;
Ursula Braun853dc2e2010-10-24 23:06:43 +00001665 }
Herbert Xuf2344a12010-05-18 15:55:27 -07001666
Joe Perchese87cc472012-05-13 21:56:26 +00001667 net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n",
1668 ifp->idev->dev->name, &ifp->addr);
Brian Haley9bdd8d42009-03-18 18:22:48 -07001669
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09001670 if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) {
1671 struct in6_addr addr;
1672
1673 addr.s6_addr32[0] = htonl(0xfe800000);
1674 addr.s6_addr32[1] = 0;
1675
1676 if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) &&
1677 ipv6_addr_equal(&ifp->addr, &addr)) {
1678 /* DAD failed for link-local based on MAC address */
1679 idev->cnf.disable_ipv6 = 1;
Brian Haley9bdd8d42009-03-18 18:22:48 -07001680
Joe Perchesf3213832012-05-15 14:11:53 +00001681 pr_info("%s: IPv6 being disabled!\n",
Brian Haley9bdd8d42009-03-18 18:22:48 -07001682 ifp->idev->dev->name);
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09001683 }
1684 }
1685
Brian Haleycc411d02009-09-09 14:41:32 +00001686 addrconf_dad_stop(ifp, 1);
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09001687}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001688
1689/* Join to solicited addr multicast group. */
1690
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001691void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001692{
1693 struct in6_addr maddr;
1694
1695 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1696 return;
1697
1698 addrconf_addr_solict_mult(addr, &maddr);
1699 ipv6_dev_mc_inc(dev, &maddr);
1700}
1701
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001702void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001703{
1704 struct in6_addr maddr;
1705
1706 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1707 return;
1708
1709 addrconf_addr_solict_mult(addr, &maddr);
1710 __ipv6_dev_mc_dec(idev, &maddr);
1711}
1712
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03001713static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001714{
1715 struct in6_addr addr;
Bjørn Mork2bda8a02011-07-05 23:04:13 +00001716 if (ifp->prefix_len == 127) /* RFC 6164 */
1717 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001718 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1719 if (ipv6_addr_any(&addr))
1720 return;
1721 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1722}
1723
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03001724static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001725{
1726 struct in6_addr addr;
YOSHIFUJI Hideaki32019e62011-07-24 11:44:34 +00001727 if (ifp->prefix_len == 127) /* RFC 6164 */
1728 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001729 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1730 if (ipv6_addr_any(&addr))
1731 return;
1732 __ipv6_dev_ac_dec(ifp->idev, &addr);
1733}
1734
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001735static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1736{
1737 if (dev->addr_len != ETH_ALEN)
1738 return -1;
1739 memcpy(eui, dev->dev_addr, 3);
1740 memcpy(eui + 5, dev->dev_addr + 3, 3);
1741
1742 /*
1743 * The zSeries OSA network cards can be shared among various
1744 * OS instances, but the OSA cards have only one MAC address.
1745 * This leads to duplicate address conflicts in conjunction
1746 * with IPv6 if more than one instance uses the same card.
1747 *
1748 * The driver for these cards can deliver a unique 16-bit
1749 * identifier for each instance sharing the same card. It is
1750 * placed instead of 0xFFFE in the interface identifier. The
1751 * "u" bit of the interface identifier is not inverted in this
1752 * case. Hence the resulting interface identifier has local
1753 * scope according to RFC2373.
1754 */
1755 if (dev->dev_id) {
1756 eui[3] = (dev->dev_id >> 8) & 0xFF;
1757 eui[4] = dev->dev_id & 0xFF;
1758 } else {
1759 eui[3] = 0xFF;
1760 eui[4] = 0xFE;
1761 eui[0] ^= 2;
1762 }
1763 return 0;
1764}
1765
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +00001766static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev)
1767{
1768 if (dev->addr_len != IEEE802154_ADDR_LEN)
1769 return -1;
1770 memcpy(eui, dev->dev_addr, 8);
YOSHIFUJI Hideaki / 吉藤英明5e98a362013-01-28 10:44:29 +00001771 eui[0] ^= 2;
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +00001772 return 0;
1773}
1774
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001775static int addrconf_ifid_ieee1394(u8 *eui, struct net_device *dev)
1776{
1777 union fwnet_hwaddr *ha;
1778
1779 if (dev->addr_len != FWNET_ALEN)
1780 return -1;
1781
1782 ha = (union fwnet_hwaddr *)dev->dev_addr;
1783
1784 memcpy(eui, &ha->uc.uniq_id, sizeof(ha->uc.uniq_id));
1785 eui[0] ^= 2;
1786 return 0;
1787}
1788
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001789static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1790{
1791 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1792 if (dev->addr_len != ARCNET_ALEN)
1793 return -1;
1794 memset(eui, 0, 7);
Eldad Zack8e5e8f32012-04-01 07:49:08 +00001795 eui[7] = *(u8 *)dev->dev_addr;
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001796 return 0;
1797}
1798
1799static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1800{
1801 if (dev->addr_len != INFINIBAND_ALEN)
1802 return -1;
1803 memcpy(eui, dev->dev_addr + 12, 8);
1804 eui[0] |= 2;
1805 return 0;
1806}
1807
stephen hemmingerc61393e2010-10-04 20:17:53 +00001808static int __ipv6_isatap_ifid(u8 *eui, __be32 addr)
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09001809{
Sascha Hlusiak9af28512009-05-19 12:56:51 +00001810 if (addr == 0)
1811 return -1;
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09001812 eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
1813 ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
1814 ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
1815 ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
1816 ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
1817 ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
1818 eui[1] = 0;
1819 eui[2] = 0x5E;
1820 eui[3] = 0xFE;
1821 memcpy(eui + 4, &addr, 4);
1822 return 0;
1823}
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09001824
1825static int addrconf_ifid_sit(u8 *eui, struct net_device *dev)
1826{
1827 if (dev->priv_flags & IFF_ISATAP)
1828 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
1829 return -1;
1830}
1831
stephen hemmingeraee80b52011-06-08 10:44:30 +00001832static int addrconf_ifid_gre(u8 *eui, struct net_device *dev)
1833{
1834 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
1835}
1836
Linus Torvalds1da177e2005-04-16 15:20:36 -07001837static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1838{
1839 switch (dev->type) {
1840 case ARPHRD_ETHER:
1841 case ARPHRD_FDDI:
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001842 return addrconf_ifid_eui48(eui, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001843 case ARPHRD_ARCNET:
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001844 return addrconf_ifid_arcnet(eui, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001845 case ARPHRD_INFINIBAND:
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001846 return addrconf_ifid_infiniband(eui, dev);
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11001847 case ARPHRD_SIT:
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09001848 return addrconf_ifid_sit(eui, dev);
stephen hemmingeraee80b52011-06-08 10:44:30 +00001849 case ARPHRD_IPGRE:
1850 return addrconf_ifid_gre(eui, dev);
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +00001851 case ARPHRD_IEEE802154:
1852 return addrconf_ifid_eui64(eui, dev);
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001853 case ARPHRD_IEEE1394:
1854 return addrconf_ifid_ieee1394(eui, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001855 }
1856 return -1;
1857}
1858
1859static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1860{
1861 int err = -1;
1862 struct inet6_ifaddr *ifp;
1863
1864 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00001865 list_for_each_entry(ifp, &idev->addr_list, if_list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001866 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1867 memcpy(eui, ifp->addr.s6_addr+8, 8);
1868 err = 0;
1869 break;
1870 }
1871 }
1872 read_unlock_bh(&idev->lock);
1873 return err;
1874}
1875
1876#ifdef CONFIG_IPV6_PRIVACY
1877/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00001878static void __ipv6_regen_rndid(struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001879{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001880regen:
YOSHIFUJI Hideaki955189e2006-03-20 16:54:09 -08001881 get_random_bytes(idev->rndid, sizeof(idev->rndid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001882 idev->rndid[0] &= ~0x02;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001883
1884 /*
1885 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1886 * check if generated address is not inappropriate
1887 *
1888 * - Reserved subnet anycast (RFC 2526)
1889 * 11111101 11....11 1xxxxxxx
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11001890 * - ISATAP (RFC4214) 6.1
Linus Torvalds1da177e2005-04-16 15:20:36 -07001891 * 00-00-5E-FE-xx-xx-xx-xx
1892 * - value 0
1893 * - XXX: already assigned to an address on the device
1894 */
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001895 if (idev->rndid[0] == 0xfd &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07001896 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1897 (idev->rndid[7]&0x80))
1898 goto regen;
1899 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1900 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1901 goto regen;
1902 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1903 goto regen;
1904 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001905}
1906
1907static void ipv6_regen_rndid(unsigned long data)
1908{
1909 struct inet6_dev *idev = (struct inet6_dev *) data;
1910 unsigned long expires;
1911
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001912 rcu_read_lock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001913 write_lock_bh(&idev->lock);
1914
1915 if (idev->dead)
1916 goto out;
1917
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00001918 __ipv6_regen_rndid(idev);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001919
Linus Torvalds1da177e2005-04-16 15:20:36 -07001920 expires = jiffies +
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001921 idev->cnf.temp_prefered_lft * HZ -
Ben Hutchings784e2712010-06-26 11:42:55 +00001922 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time -
1923 idev->cnf.max_desync_factor * HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001924 if (time_before(expires, jiffies)) {
Joe Perchesf3213832012-05-15 14:11:53 +00001925 pr_warn("%s: too short regeneration interval; timer disabled for %s\n",
1926 __func__, idev->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001927 goto out;
1928 }
1929
1930 if (!mod_timer(&idev->regen_timer, expires))
1931 in6_dev_hold(idev);
1932
1933out:
1934 write_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001935 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001936 in6_dev_put(idev);
1937}
1938
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00001939static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr)
Eldad Zack8e5e8f32012-04-01 07:49:08 +00001940{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001941 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00001942 __ipv6_regen_rndid(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001943}
1944#endif
1945
1946/*
1947 * Add prefix route.
1948 */
1949
1950static void
1951addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
Jamal Hadi Salime431b8c2005-06-18 22:55:31 -07001952 unsigned long expires, u32 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001953{
Thomas Graf86872cb2006-08-22 00:01:08 -07001954 struct fib6_config cfg = {
1955 .fc_table = RT6_TABLE_PREFIX,
1956 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1957 .fc_ifindex = dev->ifindex,
1958 .fc_expires = expires,
1959 .fc_dst_len = plen,
1960 .fc_flags = RTF_UP | flags,
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001961 .fc_nlinfo.nl_net = dev_net(dev),
Stephen Hemmingerf410a1f2008-08-23 05:16:46 -07001962 .fc_protocol = RTPROT_KERNEL,
Thomas Graf86872cb2006-08-22 00:01:08 -07001963 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001964
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +00001965 cfg.fc_dst = *pfx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001966
1967 /* Prevent useless cloning on PtP SIT.
1968 This thing is done here expecting that the whole
1969 class of non-broadcast devices need not cloning.
1970 */
Amerigo Wang07a93622012-10-29 16:23:10 +00001971#if IS_ENABLED(CONFIG_IPV6_SIT)
Thomas Graf86872cb2006-08-22 00:01:08 -07001972 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1973 cfg.fc_flags |= RTF_NONEXTHOP;
Joerg Roedel0be669b2006-10-10 14:49:53 -07001974#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001975
Thomas Graf86872cb2006-08-22 00:01:08 -07001976 ip6_route_add(&cfg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001977}
1978
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00001979
1980static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx,
1981 int plen,
1982 const struct net_device *dev,
1983 u32 flags, u32 noflags)
1984{
1985 struct fib6_node *fn;
1986 struct rt6_info *rt = NULL;
1987 struct fib6_table *table;
1988
1989 table = fib6_get_table(dev_net(dev), RT6_TABLE_PREFIX);
1990 if (table == NULL)
1991 return NULL;
1992
Li RongQing5744dd92012-09-11 21:59:01 +00001993 read_lock_bh(&table->tb6_lock);
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00001994 fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0);
1995 if (!fn)
1996 goto out;
1997 for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) {
David S. Millerd1918542011-12-28 20:19:20 -05001998 if (rt->dst.dev->ifindex != dev->ifindex)
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00001999 continue;
2000 if ((rt->rt6i_flags & flags) != flags)
2001 continue;
Romain Kuntz85da53b2013-01-09 15:02:26 +01002002 if ((rt->rt6i_flags & noflags) != 0)
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002003 continue;
2004 dst_hold(&rt->dst);
2005 break;
2006 }
2007out:
Li RongQing5744dd92012-09-11 21:59:01 +00002008 read_unlock_bh(&table->tb6_lock);
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002009 return rt;
2010}
2011
2012
Linus Torvalds1da177e2005-04-16 15:20:36 -07002013/* Create "default" multicast route to the interface */
2014
2015static void addrconf_add_mroute(struct net_device *dev)
2016{
Thomas Graf86872cb2006-08-22 00:01:08 -07002017 struct fib6_config cfg = {
2018 .fc_table = RT6_TABLE_LOCAL,
2019 .fc_metric = IP6_RT_PRIO_ADDRCONF,
2020 .fc_ifindex = dev->ifindex,
2021 .fc_dst_len = 8,
2022 .fc_flags = RTF_UP,
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09002023 .fc_nlinfo.nl_net = dev_net(dev),
Thomas Graf86872cb2006-08-22 00:01:08 -07002024 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07002025
Thomas Graf86872cb2006-08-22 00:01:08 -07002026 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
2027
2028 ip6_route_add(&cfg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002029}
2030
Amerigo Wang07a93622012-10-29 16:23:10 +00002031#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002032static void sit_route_add(struct net_device *dev)
2033{
Thomas Graf86872cb2006-08-22 00:01:08 -07002034 struct fib6_config cfg = {
2035 .fc_table = RT6_TABLE_MAIN,
2036 .fc_metric = IP6_RT_PRIO_ADDRCONF,
2037 .fc_ifindex = dev->ifindex,
2038 .fc_dst_len = 96,
2039 .fc_flags = RTF_UP | RTF_NONEXTHOP,
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09002040 .fc_nlinfo.nl_net = dev_net(dev),
Thomas Graf86872cb2006-08-22 00:01:08 -07002041 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07002042
2043 /* prefix length - 96 bits "::d.d.d.d" */
Thomas Graf86872cb2006-08-22 00:01:08 -07002044 ip6_route_add(&cfg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002045}
Joerg Roedel0be669b2006-10-10 14:49:53 -07002046#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002047
Linus Torvalds1da177e2005-04-16 15:20:36 -07002048static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
2049{
2050 struct inet6_dev *idev;
2051
2052 ASSERT_RTNL();
2053
Stephen Hemmingere21e8462010-03-20 16:09:01 -07002054 idev = ipv6_find_idev(dev);
2055 if (!idev)
Brian Haley64e724f2010-07-20 10:34:30 +00002056 return ERR_PTR(-ENOBUFS);
2057
2058 if (idev->cnf.disable_ipv6)
2059 return ERR_PTR(-EACCES);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002060
2061 /* Add default multicast route */
Li Wei4af04ab2011-12-06 21:23:45 +00002062 if (!(dev->flags & IFF_LOOPBACK))
2063 addrconf_add_mroute(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002064
Linus Torvalds1da177e2005-04-16 15:20:36 -07002065 return idev;
2066}
2067
Neil Hormane6bff992012-01-04 10:49:15 +00002068void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002069{
2070 struct prefix_info *pinfo;
2071 __u32 valid_lft;
2072 __u32 prefered_lft;
2073 int addr_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002074 struct inet6_dev *in6_dev;
Brian Haley56d417b2009-06-01 03:07:33 -07002075 struct net *net = dev_net(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002076
2077 pinfo = (struct prefix_info *) opt;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002078
Linus Torvalds1da177e2005-04-16 15:20:36 -07002079 if (len < sizeof(struct prefix_info)) {
2080 ADBG(("addrconf: prefix option too short\n"));
2081 return;
2082 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002083
Linus Torvalds1da177e2005-04-16 15:20:36 -07002084 /*
2085 * Validation checks ([ADDRCONF], page 19)
2086 */
2087
2088 addr_type = ipv6_addr_type(&pinfo->prefix);
2089
2090 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
2091 return;
2092
2093 valid_lft = ntohl(pinfo->valid);
2094 prefered_lft = ntohl(pinfo->prefered);
2095
2096 if (prefered_lft > valid_lft) {
Joe Perchese87cc472012-05-13 21:56:26 +00002097 net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002098 return;
2099 }
2100
2101 in6_dev = in6_dev_get(dev);
2102
2103 if (in6_dev == NULL) {
Joe Perchese87cc472012-05-13 21:56:26 +00002104 net_dbg_ratelimited("addrconf: device %s not configured\n",
2105 dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002106 return;
2107 }
2108
2109 /*
2110 * Two things going on here:
2111 * 1) Add routes for on-link prefixes
2112 * 2) Configure prefixes with the auto flag set
2113 */
2114
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002115 if (pinfo->onlink) {
2116 struct rt6_info *rt;
2117 unsigned long rt_expires;
2118
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002119 /* Avoid arithmetic overflow. Really, we could
2120 * save rt_expires in seconds, likely valid_lft,
2121 * but it would require division in fib gc, that it
2122 * not good.
2123 */
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002124 if (HZ > USER_HZ)
2125 rt_expires = addrconf_timeout_fixup(valid_lft, HZ);
2126 else
2127 rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ);
YOSHIFUJI Hideaki3dd4bc62005-12-19 14:02:45 -08002128
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002129 if (addrconf_finite_timeout(rt_expires))
2130 rt_expires *= HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002131
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002132 rt = addrconf_get_prefix_route(&pinfo->prefix,
2133 pinfo->prefix_len,
2134 dev,
2135 RTF_ADDRCONF | RTF_PREFIX_RT,
2136 RTF_GATEWAY | RTF_DEFAULT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002137
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002138 if (rt) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002139 /* Autoconf prefix route */
2140 if (valid_lft == 0) {
2141 ip6_del_rt(rt);
2142 rt = NULL;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002143 } else if (addrconf_finite_timeout(rt_expires)) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002144 /* not infinity */
Gao feng1716a962012-04-06 00:13:10 +00002145 rt6_set_expires(rt, jiffies + rt_expires);
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002146 } else {
Gao feng1716a962012-04-06 00:13:10 +00002147 rt6_clean_expires(rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002148 }
2149 } else if (valid_lft) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002150 clock_t expires = 0;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002151 int flags = RTF_ADDRCONF | RTF_PREFIX_RT;
2152 if (addrconf_finite_timeout(rt_expires)) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002153 /* not infinity */
2154 flags |= RTF_EXPIRES;
2155 expires = jiffies_to_clock_t(rt_expires);
2156 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002157 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002158 dev, expires, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002159 }
Amerigo Wang94e187c2012-10-29 00:13:19 +00002160 ip6_rt_put(rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002161 }
2162
2163 /* Try to figure out our local address for this prefix */
2164
2165 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002166 struct inet6_ifaddr *ifp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002167 struct in6_addr addr;
2168 int create = 0, update_lft = 0;
Daniel Borkmann617fe292013-04-09 03:47:16 +00002169 bool tokenized = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002170
2171 if (pinfo->prefix_len == 64) {
2172 memcpy(&addr, &pinfo->prefix, 8);
Daniel Borkmannf53adae2013-04-08 04:01:30 +00002173
2174 if (!ipv6_addr_any(&in6_dev->token)) {
2175 read_lock_bh(&in6_dev->lock);
2176 memcpy(addr.s6_addr + 8,
2177 in6_dev->token.s6_addr + 8, 8);
2178 read_unlock_bh(&in6_dev->lock);
Daniel Borkmann617fe292013-04-09 03:47:16 +00002179 tokenized = true;
Daniel Borkmannf53adae2013-04-08 04:01:30 +00002180 } else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
2181 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002182 in6_dev_put(in6_dev);
2183 return;
2184 }
2185 goto ok;
2186 }
Joe Perchese87cc472012-05-13 21:56:26 +00002187 net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n",
2188 pinfo->prefix_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002189 in6_dev_put(in6_dev);
2190 return;
2191
2192ok:
2193
YOSHIFUJI Hideaki53b79972008-07-19 22:35:03 -07002194 ifp = ipv6_get_ifaddr(net, &addr, dev, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002195
2196 if (ifp == NULL && valid_lft) {
2197 int max_addresses = in6_dev->cnf.max_addresses;
Neil Horman95c385b2007-04-25 17:08:10 -07002198 u32 addr_flags = 0;
2199
2200#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2201 if (in6_dev->cnf.optimistic_dad &&
Neil Hormane6bff992012-01-04 10:49:15 +00002202 !net->ipv6.devconf_all->forwarding && sllao)
Neil Horman95c385b2007-04-25 17:08:10 -07002203 addr_flags = IFA_F_OPTIMISTIC;
2204#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002205
2206 /* Do not allow to create too much of autoconfigured
2207 * addresses; this would be too easy way to crash kernel.
2208 */
2209 if (!max_addresses ||
2210 ipv6_count_addresses(in6_dev) < max_addresses)
2211 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
Neil Horman95c385b2007-04-25 17:08:10 -07002212 addr_type&IPV6_ADDR_SCOPE_MASK,
2213 addr_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002214
YOSHIFUJI Hideaki / 吉藤英明3f0d2ba2013-01-22 06:32:54 +00002215 if (IS_ERR_OR_NULL(ifp)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002216 in6_dev_put(in6_dev);
2217 return;
2218 }
2219
2220 update_lft = create = 1;
2221 ifp->cstamp = jiffies;
Daniel Borkmann617fe292013-04-09 03:47:16 +00002222 ifp->tokenized = tokenized;
David S. Millercf22f9a2012-04-14 21:37:40 -04002223 addrconf_dad_start(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002224 }
2225
2226 if (ifp) {
2227 int flags;
2228 unsigned long now;
2229#ifdef CONFIG_IPV6_PRIVACY
2230 struct inet6_ifaddr *ift;
2231#endif
2232 u32 stored_lft;
2233
2234 /* update lifetime (RFC2462 5.5.3 e) */
2235 spin_lock(&ifp->lock);
2236 now = jiffies;
2237 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
2238 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
2239 else
2240 stored_lft = 0;
2241 if (!update_lft && stored_lft) {
2242 if (valid_lft > MIN_VALID_LIFETIME ||
2243 valid_lft > stored_lft)
2244 update_lft = 1;
2245 else if (stored_lft <= MIN_VALID_LIFETIME) {
2246 /* valid_lft <= stored_lft is always true */
Brian Haleya1ed0522009-07-02 07:10:52 +00002247 /*
2248 * RFC 4862 Section 5.5.3e:
2249 * "Note that the preferred lifetime of
2250 * the corresponding address is always
2251 * reset to the Preferred Lifetime in
2252 * the received Prefix Information
2253 * option, regardless of whether the
2254 * valid lifetime is also reset or
2255 * ignored."
2256 *
2257 * So if the preferred lifetime in
2258 * this advertisement is different
2259 * than what we have stored, but the
2260 * valid lifetime is invalid, just
2261 * reset prefered_lft.
2262 *
2263 * We must set the valid lifetime
2264 * to the stored lifetime since we'll
2265 * be updating the timestamp below,
2266 * else we'll set it back to the
Lucas De Marchi25985ed2011-03-30 22:57:33 -03002267 * minimum.
Brian Haleya1ed0522009-07-02 07:10:52 +00002268 */
2269 if (prefered_lft != ifp->prefered_lft) {
2270 valid_lft = stored_lft;
2271 update_lft = 1;
2272 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002273 } else {
2274 valid_lft = MIN_VALID_LIFETIME;
2275 if (valid_lft < prefered_lft)
2276 prefered_lft = valid_lft;
2277 update_lft = 1;
2278 }
2279 }
2280
2281 if (update_lft) {
2282 ifp->valid_lft = valid_lft;
2283 ifp->prefered_lft = prefered_lft;
2284 ifp->tstamp = now;
2285 flags = ifp->flags;
2286 ifp->flags &= ~IFA_F_DEPRECATED;
2287 spin_unlock(&ifp->lock);
2288
2289 if (!(flags&IFA_F_TENTATIVE))
2290 ipv6_ifa_notify(0, ifp);
2291 } else
2292 spin_unlock(&ifp->lock);
2293
2294#ifdef CONFIG_IPV6_PRIVACY
2295 read_lock_bh(&in6_dev->lock);
2296 /* update all temporary addresses in the list */
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00002297 list_for_each_entry(ift, &in6_dev->tempaddr_list,
2298 tmp_list) {
2299 int age, max_valid, max_prefered;
2300
Benoit Boissinotc6fbfac2008-04-02 00:00:58 -07002301 if (ifp != ift->ifpub)
2302 continue;
2303
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00002304 /*
2305 * RFC 4941 section 3.3:
2306 * If a received option will extend the lifetime
2307 * of a public address, the lifetimes of
2308 * temporary addresses should be extended,
2309 * subject to the overall constraint that no
2310 * temporary addresses should ever remain
2311 * "valid" or "preferred" for a time longer than
2312 * (TEMP_VALID_LIFETIME) or
2313 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR),
2314 * respectively.
2315 */
2316 age = (now - ift->cstamp) / HZ;
2317 max_valid = in6_dev->cnf.temp_valid_lft - age;
2318 if (max_valid < 0)
2319 max_valid = 0;
2320
2321 max_prefered = in6_dev->cnf.temp_prefered_lft -
2322 in6_dev->cnf.max_desync_factor -
2323 age;
2324 if (max_prefered < 0)
2325 max_prefered = 0;
2326
2327 if (valid_lft > max_valid)
2328 valid_lft = max_valid;
2329
2330 if (prefered_lft > max_prefered)
2331 prefered_lft = max_prefered;
2332
Linus Torvalds1da177e2005-04-16 15:20:36 -07002333 spin_lock(&ift->lock);
2334 flags = ift->flags;
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00002335 ift->valid_lft = valid_lft;
2336 ift->prefered_lft = prefered_lft;
2337 ift->tstamp = now;
2338 if (prefered_lft > 0)
2339 ift->flags &= ~IFA_F_DEPRECATED;
2340
Linus Torvalds1da177e2005-04-16 15:20:36 -07002341 spin_unlock(&ift->lock);
2342 if (!(flags&IFA_F_TENTATIVE))
2343 ipv6_ifa_notify(0, ift);
2344 }
2345
Glenn Wursteraed65502010-09-27 07:04:30 +00002346 if ((create || list_empty(&in6_dev->tempaddr_list)) && in6_dev->cnf.use_tempaddr > 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002347 /*
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00002348 * When a new public address is created as
2349 * described in [ADDRCONF], also create a new
2350 * temporary address. Also create a temporary
2351 * address if it's enabled but no temporary
2352 * address currently exists.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002353 */
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002354 read_unlock_bh(&in6_dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002355 ipv6_create_tempaddr(ifp, NULL);
2356 } else {
2357 read_unlock_bh(&in6_dev->lock);
2358 }
2359#endif
2360 in6_ifa_put(ifp);
2361 addrconf_verify(0);
2362 }
2363 }
2364 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
2365 in6_dev_put(in6_dev);
2366}
2367
2368/*
2369 * Set destination address.
2370 * Special case for SIT interfaces where we create a new "virtual"
2371 * device.
2372 */
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002373int addrconf_set_dstaddr(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002374{
2375 struct in6_ifreq ireq;
2376 struct net_device *dev;
2377 int err = -EINVAL;
2378
2379 rtnl_lock();
2380
2381 err = -EFAULT;
2382 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2383 goto err_exit;
2384
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002385 dev = __dev_get_by_index(net, ireq.ifr6_ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002386
2387 err = -ENODEV;
2388 if (dev == NULL)
2389 goto err_exit;
2390
Amerigo Wang07a93622012-10-29 16:23:10 +00002391#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002392 if (dev->type == ARPHRD_SIT) {
Stephen Hemminger5bc3eb72008-11-19 21:52:05 -08002393 const struct net_device_ops *ops = dev->netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002394 struct ifreq ifr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002395 struct ip_tunnel_parm p;
2396
2397 err = -EADDRNOTAVAIL;
2398 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
2399 goto err_exit;
2400
2401 memset(&p, 0, sizeof(p));
2402 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
2403 p.iph.saddr = 0;
2404 p.iph.version = 4;
2405 p.iph.ihl = 5;
2406 p.iph.protocol = IPPROTO_IPV6;
2407 p.iph.ttl = 64;
Stephen Hemmingerd20b3102008-01-21 00:48:43 -08002408 ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002409
Stephen Hemminger5bc3eb72008-11-19 21:52:05 -08002410 if (ops->ndo_do_ioctl) {
2411 mm_segment_t oldfs = get_fs();
2412
2413 set_fs(KERNEL_DS);
2414 err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL);
2415 set_fs(oldfs);
2416 } else
2417 err = -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002418
2419 if (err == 0) {
2420 err = -ENOBUFS;
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002421 dev = __dev_get_by_name(net, p.name);
2422 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002423 goto err_exit;
2424 err = dev_open(dev);
2425 }
2426 }
Joerg Roedel0be669b2006-10-10 14:49:53 -07002427#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002428
2429err_exit:
2430 rtnl_unlock();
2431 return err;
2432}
2433
2434/*
2435 * Manual configuration of address on an interface
2436 */
Eric Dumazetb71d1d42011-04-22 04:53:02 +00002437static int inet6_addr_add(struct net *net, int ifindex, const struct in6_addr *pfx,
Thomas Graf24ef0da2008-05-28 16:54:22 +02002438 unsigned int plen, __u8 ifa_flags, __u32 prefered_lft,
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002439 __u32 valid_lft)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002440{
2441 struct inet6_ifaddr *ifp;
2442 struct inet6_dev *idev;
2443 struct net_device *dev;
2444 int scope;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002445 u32 flags;
2446 clock_t expires;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002447 unsigned long timeout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002448
2449 ASSERT_RTNL();
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002450
Thomas Graf24ef0da2008-05-28 16:54:22 +02002451 if (plen > 128)
2452 return -EINVAL;
2453
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002454 /* check the lifetime */
2455 if (!valid_lft || prefered_lft > valid_lft)
2456 return -EINVAL;
2457
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002458 dev = __dev_get_by_index(net, ifindex);
2459 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002460 return -ENODEV;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002461
Brian Haley64e724f2010-07-20 10:34:30 +00002462 idev = addrconf_add_dev(dev);
2463 if (IS_ERR(idev))
2464 return PTR_ERR(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002465
2466 scope = ipv6_addr_scope(pfx);
2467
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002468 timeout = addrconf_timeout_fixup(valid_lft, HZ);
2469 if (addrconf_finite_timeout(timeout)) {
2470 expires = jiffies_to_clock_t(timeout * HZ);
2471 valid_lft = timeout;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002472 flags = RTF_EXPIRES;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002473 } else {
2474 expires = 0;
2475 flags = 0;
2476 ifa_flags |= IFA_F_PERMANENT;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002477 }
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002478
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002479 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
2480 if (addrconf_finite_timeout(timeout)) {
2481 if (timeout == 0)
2482 ifa_flags |= IFA_F_DEPRECATED;
2483 prefered_lft = timeout;
2484 }
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002485
2486 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
2487
Linus Torvalds1da177e2005-04-16 15:20:36 -07002488 if (!IS_ERR(ifp)) {
Herbert Xu06aebfb2006-08-09 16:52:04 -07002489 spin_lock_bh(&ifp->lock);
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002490 ifp->valid_lft = valid_lft;
2491 ifp->prefered_lft = prefered_lft;
2492 ifp->tstamp = jiffies;
Herbert Xu06aebfb2006-08-09 16:52:04 -07002493 spin_unlock_bh(&ifp->lock);
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002494
YOSHIFUJI Hideaki46d48042007-02-07 20:36:26 +09002495 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002496 expires, flags);
Neil Horman95c385b2007-04-25 17:08:10 -07002497 /*
2498 * Note that section 3.1 of RFC 4429 indicates
2499 * that the Optimistic flag should not be set for
2500 * manually configured addresses
2501 */
David S. Millercf22f9a2012-04-14 21:37:40 -04002502 addrconf_dad_start(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002503 in6_ifa_put(ifp);
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002504 addrconf_verify(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002505 return 0;
2506 }
2507
2508 return PTR_ERR(ifp);
2509}
2510
Eric Dumazetb71d1d42011-04-22 04:53:02 +00002511static int inet6_addr_del(struct net *net, int ifindex, const struct in6_addr *pfx,
Thomas Graf24ef0da2008-05-28 16:54:22 +02002512 unsigned int plen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002513{
2514 struct inet6_ifaddr *ifp;
2515 struct inet6_dev *idev;
2516 struct net_device *dev;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002517
Thomas Graf24ef0da2008-05-28 16:54:22 +02002518 if (plen > 128)
2519 return -EINVAL;
2520
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002521 dev = __dev_get_by_index(net, ifindex);
2522 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002523 return -ENODEV;
2524
2525 if ((idev = __in6_dev_get(dev)) == NULL)
2526 return -ENXIO;
2527
2528 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00002529 list_for_each_entry(ifp, &idev->addr_list, if_list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002530 if (ifp->prefix_len == plen &&
2531 ipv6_addr_equal(pfx, &ifp->addr)) {
2532 in6_ifa_hold(ifp);
2533 read_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002534
Linus Torvalds1da177e2005-04-16 15:20:36 -07002535 ipv6_del_addr(ifp);
2536
2537 /* If the last address is deleted administratively,
2538 disable IPv6 on this interface.
2539 */
stephen hemminger502a2ff2010-03-17 20:31:13 +00002540 if (list_empty(&idev->addr_list))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002541 addrconf_ifdown(idev->dev, 1);
2542 return 0;
2543 }
2544 }
2545 read_unlock_bh(&idev->lock);
2546 return -EADDRNOTAVAIL;
2547}
2548
2549
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002550int addrconf_add_ifaddr(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002551{
2552 struct in6_ifreq ireq;
2553 int err;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002554
Eric W. Biedermanaf31f412012-11-16 03:03:06 +00002555 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002556 return -EPERM;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002557
Linus Torvalds1da177e2005-04-16 15:20:36 -07002558 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2559 return -EFAULT;
2560
2561 rtnl_lock();
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002562 err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2563 ireq.ifr6_prefixlen, IFA_F_PERMANENT,
2564 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002565 rtnl_unlock();
2566 return err;
2567}
2568
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002569int addrconf_del_ifaddr(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002570{
2571 struct in6_ifreq ireq;
2572 int err;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002573
Eric W. Biedermanaf31f412012-11-16 03:03:06 +00002574 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002575 return -EPERM;
2576
2577 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2578 return -EFAULT;
2579
2580 rtnl_lock();
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002581 err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2582 ireq.ifr6_prefixlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002583 rtnl_unlock();
2584 return err;
2585}
2586
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002587static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
2588 int plen, int scope)
2589{
2590 struct inet6_ifaddr *ifp;
2591
2592 ifp = ipv6_add_addr(idev, addr, plen, scope, IFA_F_PERMANENT);
2593 if (!IS_ERR(ifp)) {
2594 spin_lock_bh(&ifp->lock);
2595 ifp->flags &= ~IFA_F_TENTATIVE;
2596 spin_unlock_bh(&ifp->lock);
2597 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2598 in6_ifa_put(ifp);
2599 }
2600}
2601
Amerigo Wang07a93622012-10-29 16:23:10 +00002602#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002603static void sit_add_v4_addrs(struct inet6_dev *idev)
2604{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002605 struct in6_addr addr;
2606 struct net_device *dev;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09002607 struct net *net = dev_net(idev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002608 int scope;
2609
2610 ASSERT_RTNL();
2611
2612 memset(&addr, 0, sizeof(struct in6_addr));
2613 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2614
2615 if (idev->dev->flags&IFF_POINTOPOINT) {
2616 addr.s6_addr32[0] = htonl(0xfe800000);
2617 scope = IFA_LINK;
2618 } else {
2619 scope = IPV6_ADDR_COMPATv4;
2620 }
2621
2622 if (addr.s6_addr32[3]) {
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002623 add_addr(idev, &addr, 128, scope);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002624 return;
2625 }
2626
Benjamin Thery6fda7352008-03-05 10:47:47 -08002627 for_each_netdev(net, dev) {
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002628 struct in_device *in_dev = __in_dev_get_rtnl(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002629 if (in_dev && (dev->flags & IFF_UP)) {
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002630 struct in_ifaddr *ifa;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002631
2632 int flag = scope;
2633
2634 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2635 int plen;
2636
2637 addr.s6_addr32[3] = ifa->ifa_local;
2638
2639 if (ifa->ifa_scope == RT_SCOPE_LINK)
2640 continue;
2641 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2642 if (idev->dev->flags&IFF_POINTOPOINT)
2643 continue;
2644 flag |= IFA_HOST;
2645 }
2646 if (idev->dev->flags&IFF_POINTOPOINT)
2647 plen = 64;
2648 else
2649 plen = 96;
2650
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002651 add_addr(idev, &addr, plen, flag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002652 }
2653 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002654 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002655}
Joerg Roedel0be669b2006-10-10 14:49:53 -07002656#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002657
2658static void init_loopback(struct net_device *dev)
2659{
2660 struct inet6_dev *idev;
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05302661 struct net_device *sp_dev;
2662 struct inet6_ifaddr *sp_ifa;
2663 struct rt6_info *sp_rt;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002664
2665 /* ::1 */
2666
2667 ASSERT_RTNL();
2668
2669 if ((idev = ipv6_find_idev(dev)) == NULL) {
Joe Perches91df42b2012-05-15 14:11:54 +00002670 pr_debug("%s: add_dev failed\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002671 return;
2672 }
2673
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002674 add_addr(idev, &in6addr_loopback, 128, IFA_HOST);
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05302675
2676 /* Add routes to other interface's IPv6 addresses */
2677 for_each_netdev(dev_net(dev), sp_dev) {
2678 if (!strcmp(sp_dev->name, dev->name))
2679 continue;
2680
2681 idev = __in6_dev_get(sp_dev);
2682 if (!idev)
2683 continue;
2684
2685 read_lock_bh(&idev->lock);
2686 list_for_each_entry(sp_ifa, &idev->addr_list, if_list) {
2687
2688 if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE))
2689 continue;
2690
Gao fenga881ae12013-06-16 11:14:30 +08002691 if (sp_ifa->rt)
2692 continue;
2693
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05302694 sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, 0);
2695
2696 /* Failure cases are ignored */
Gao feng534c8772013-06-02 22:16:21 +00002697 if (!IS_ERR(sp_rt)) {
2698 sp_ifa->rt = sp_rt;
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05302699 ip6_ins_rt(sp_rt);
Gao feng534c8772013-06-02 22:16:21 +00002700 }
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05302701 }
2702 read_unlock_bh(&idev->lock);
2703 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002704}
2705
Eric Dumazetb71d1d42011-04-22 04:53:02 +00002706static void addrconf_add_linklocal(struct inet6_dev *idev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002707{
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002708 struct inet6_ifaddr *ifp;
Neil Horman95c385b2007-04-25 17:08:10 -07002709 u32 addr_flags = IFA_F_PERMANENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002710
Neil Horman95c385b2007-04-25 17:08:10 -07002711#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2712 if (idev->cnf.optimistic_dad &&
David Miller702beb82008-07-20 18:17:02 -07002713 !dev_net(idev->dev)->ipv6.devconf_all->forwarding)
Neil Horman95c385b2007-04-25 17:08:10 -07002714 addr_flags |= IFA_F_OPTIMISTIC;
2715#endif
2716
2717
2718 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002719 if (!IS_ERR(ifp)) {
YOSHIFUJI Hideaki46d48042007-02-07 20:36:26 +09002720 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
David S. Millercf22f9a2012-04-14 21:37:40 -04002721 addrconf_dad_start(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002722 in6_ifa_put(ifp);
2723 }
2724}
2725
2726static void addrconf_dev_config(struct net_device *dev)
2727{
2728 struct in6_addr addr;
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002729 struct inet6_dev *idev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002730
2731 ASSERT_RTNL();
2732
Herbert Xu74235a22007-06-14 13:02:55 -07002733 if ((dev->type != ARPHRD_ETHER) &&
2734 (dev->type != ARPHRD_FDDI) &&
Herbert Xu74235a22007-06-14 13:02:55 -07002735 (dev->type != ARPHRD_ARCNET) &&
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +00002736 (dev->type != ARPHRD_INFINIBAND) &&
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00002737 (dev->type != ARPHRD_IEEE802154) &&
2738 (dev->type != ARPHRD_IEEE1394)) {
Herbert Xu74235a22007-06-14 13:02:55 -07002739 /* Alas, we support only Ethernet autoconfiguration. */
2740 return;
2741 }
2742
Linus Torvalds1da177e2005-04-16 15:20:36 -07002743 idev = addrconf_add_dev(dev);
Brian Haley64e724f2010-07-20 10:34:30 +00002744 if (IS_ERR(idev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002745 return;
2746
2747 memset(&addr, 0, sizeof(struct in6_addr));
2748 addr.s6_addr32[0] = htonl(0xFE800000);
2749
2750 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2751 addrconf_add_linklocal(idev, &addr);
2752}
2753
Amerigo Wang07a93622012-10-29 16:23:10 +00002754#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002755static void addrconf_sit_config(struct net_device *dev)
2756{
2757 struct inet6_dev *idev;
2758
2759 ASSERT_RTNL();
2760
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002761 /*
2762 * Configure the tunnel with one of our IPv4
2763 * addresses... we should configure all of
Linus Torvalds1da177e2005-04-16 15:20:36 -07002764 * our v4 addrs in the tunnel
2765 */
2766
2767 if ((idev = ipv6_find_idev(dev)) == NULL) {
Joe Perches91df42b2012-05-15 14:11:54 +00002768 pr_debug("%s: add_dev failed\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002769 return;
2770 }
2771
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11002772 if (dev->priv_flags & IFF_ISATAP) {
2773 struct in6_addr addr;
2774
2775 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
2776 addrconf_prefix_route(&addr, 64, dev, 0, 0);
2777 if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
2778 addrconf_add_linklocal(idev, &addr);
2779 return;
2780 }
2781
Linus Torvalds1da177e2005-04-16 15:20:36 -07002782 sit_add_v4_addrs(idev);
2783
Nicolas Dichtel62b54dd2012-10-01 23:19:14 +00002784 if (dev->flags&IFF_POINTOPOINT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002785 addrconf_add_mroute(dev);
Nicolas Dichtel62b54dd2012-10-01 23:19:14 +00002786 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07002787 sit_route_add(dev);
2788}
Joerg Roedel0be669b2006-10-10 14:49:53 -07002789#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002790
Amerigo Wang07a93622012-10-29 16:23:10 +00002791#if IS_ENABLED(CONFIG_NET_IPGRE)
stephen hemmingeraee80b52011-06-08 10:44:30 +00002792static void addrconf_gre_config(struct net_device *dev)
2793{
2794 struct inet6_dev *idev;
2795 struct in6_addr addr;
2796
Joe Perchesf3213832012-05-15 14:11:53 +00002797 pr_info("%s(%s)\n", __func__, dev->name);
stephen hemmingeraee80b52011-06-08 10:44:30 +00002798
2799 ASSERT_RTNL();
2800
2801 if ((idev = ipv6_find_idev(dev)) == NULL) {
Joe Perches91df42b2012-05-15 14:11:54 +00002802 pr_debug("%s: add_dev failed\n", __func__);
stephen hemmingeraee80b52011-06-08 10:44:30 +00002803 return;
2804 }
2805
2806 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
2807 addrconf_prefix_route(&addr, 64, dev, 0, 0);
2808
2809 if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
2810 addrconf_add_linklocal(idev, &addr);
2811}
2812#endif
2813
Linus Torvalds1da177e2005-04-16 15:20:36 -07002814static inline int
2815ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2816{
2817 struct in6_addr lladdr;
2818
Neil Horman95c385b2007-04-25 17:08:10 -07002819 if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002820 addrconf_add_linklocal(idev, &lladdr);
2821 return 0;
2822 }
2823 return -1;
2824}
2825
2826static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2827{
2828 struct net_device *link_dev;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09002829 struct net *net = dev_net(idev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002830
2831 /* first try to inherit the link-local address from the link device */
2832 if (idev->dev->iflink &&
Benjamin Thery6fda7352008-03-05 10:47:47 -08002833 (link_dev = __dev_get_by_index(net, idev->dev->iflink))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002834 if (!ipv6_inherit_linklocal(idev, link_dev))
2835 return;
2836 }
2837 /* then try to inherit it from any device */
Benjamin Thery6fda7352008-03-05 10:47:47 -08002838 for_each_netdev(net, link_dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002839 if (!ipv6_inherit_linklocal(idev, link_dev))
2840 return;
2841 }
Joe Perches91df42b2012-05-15 14:11:54 +00002842 pr_debug("init ip6-ip6: add_linklocal failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002843}
2844
2845/*
2846 * Autoconfigure tunnel with a link-local address so routing protocols,
2847 * DHCPv6, MLD etc. can be run over the virtual link
2848 */
2849
2850static void addrconf_ip6_tnl_config(struct net_device *dev)
2851{
2852 struct inet6_dev *idev;
2853
2854 ASSERT_RTNL();
2855
Stephen Hemmingere21e8462010-03-20 16:09:01 -07002856 idev = addrconf_add_dev(dev);
Brian Haley64e724f2010-07-20 10:34:30 +00002857 if (IS_ERR(idev)) {
Joe Perches91df42b2012-05-15 14:11:54 +00002858 pr_debug("init ip6-ip6: add_dev failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002859 return;
2860 }
2861 ip6_tnl_add_linklocal(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002862}
2863
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002864static int addrconf_notify(struct notifier_block *this, unsigned long event,
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002865 void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002866{
2867 struct net_device *dev = (struct net_device *) data;
Eric Dumazet748e2d92012-08-22 21:50:59 +00002868 struct inet6_dev *idev = __in6_dev_get(dev);
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09002869 int run_pending = 0;
Herbert Xub217d612007-07-30 17:04:52 -07002870 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002871
Stephen Hemmingere21e8462010-03-20 16:09:01 -07002872 switch (event) {
YOSHIFUJI Hideaki45ba9dd2007-02-15 02:07:27 +09002873 case NETDEV_REGISTER:
Herbert Xu74235a22007-06-14 13:02:55 -07002874 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
YOSHIFUJI Hideaki45ba9dd2007-02-15 02:07:27 +09002875 idev = ipv6_add_dev(dev);
2876 if (!idev)
Herbert Xub217d612007-07-30 17:04:52 -07002877 return notifier_from_errno(-ENOMEM);
YOSHIFUJI Hideaki45ba9dd2007-02-15 02:07:27 +09002878 }
2879 break;
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002880
Linus Torvalds1da177e2005-04-16 15:20:36 -07002881 case NETDEV_UP:
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002882 case NETDEV_CHANGE:
Jay Vosburghc2edacf2007-07-09 10:42:47 -07002883 if (dev->flags & IFF_SLAVE)
2884 break;
2885
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002886 if (event == NETDEV_UP) {
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -07002887 if (!addrconf_qdisc_ok(dev)) {
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002888 /* device is not ready yet. */
Joe Perchesf3213832012-05-15 14:11:53 +00002889 pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n",
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002890 dev->name);
2891 break;
2892 }
Kristian Slavov99081042006-02-08 16:10:53 -08002893
Evgeniy Polyakovd31c7b82007-11-30 23:36:08 +11002894 if (!idev && dev->mtu >= IPV6_MIN_MTU)
2895 idev = ipv6_add_dev(dev);
2896
Benjamin Therye3ec6cf2008-11-05 01:43:57 -08002897 if (idev) {
Kristian Slavov99081042006-02-08 16:10:53 -08002898 idev->if_flags |= IF_READY;
Benjamin Therye3ec6cf2008-11-05 01:43:57 -08002899 run_pending = 1;
2900 }
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002901 } else {
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -07002902 if (!addrconf_qdisc_ok(dev)) {
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002903 /* device is still not ready. */
2904 break;
2905 }
2906
2907 if (idev) {
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002908 if (idev->if_flags & IF_READY)
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002909 /* device is already configured. */
2910 break;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002911 idev->if_flags |= IF_READY;
2912 }
2913
Joe Perchesf3213832012-05-15 14:11:53 +00002914 pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n",
2915 dev->name);
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002916
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09002917 run_pending = 1;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002918 }
2919
Stephen Hemmingere21e8462010-03-20 16:09:01 -07002920 switch (dev->type) {
Amerigo Wang07a93622012-10-29 16:23:10 +00002921#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002922 case ARPHRD_SIT:
2923 addrconf_sit_config(dev);
2924 break;
Joerg Roedel0be669b2006-10-10 14:49:53 -07002925#endif
Amerigo Wang07a93622012-10-29 16:23:10 +00002926#if IS_ENABLED(CONFIG_NET_IPGRE)
stephen hemmingeraee80b52011-06-08 10:44:30 +00002927 case ARPHRD_IPGRE:
2928 addrconf_gre_config(dev);
2929 break;
2930#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002931 case ARPHRD_TUNNEL6:
2932 addrconf_ip6_tnl_config(dev);
2933 break;
2934 case ARPHRD_LOOPBACK:
2935 init_loopback(dev);
2936 break;
2937
2938 default:
2939 addrconf_dev_config(dev);
2940 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07002941 }
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002942
Linus Torvalds1da177e2005-04-16 15:20:36 -07002943 if (idev) {
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09002944 if (run_pending)
2945 addrconf_dad_run(idev);
2946
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002947 /*
2948 * If the MTU changed during the interface down,
2949 * when the interface up, the changed MTU must be
2950 * reflected in the idev as well as routers.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002951 */
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002952 if (idev->cnf.mtu6 != dev->mtu &&
2953 dev->mtu >= IPV6_MIN_MTU) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002954 rt6_mtu_change(dev, dev->mtu);
2955 idev->cnf.mtu6 = dev->mtu;
2956 }
2957 idev->tstamp = jiffies;
2958 inet6_ifinfo_notify(RTM_NEWLINK, idev);
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002959
2960 /*
2961 * If the changed mtu during down is lower than
2962 * IPV6_MIN_MTU stop IPv6 on this interface.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002963 */
2964 if (dev->mtu < IPV6_MIN_MTU)
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002965 addrconf_ifdown(dev, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002966 }
2967 break;
2968
2969 case NETDEV_CHANGEMTU:
Evgeniy Polyakovd31c7b82007-11-30 23:36:08 +11002970 if (idev && dev->mtu >= IPV6_MIN_MTU) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002971 rt6_mtu_change(dev, dev->mtu);
2972 idev->cnf.mtu6 = dev->mtu;
2973 break;
2974 }
2975
Evgeniy Polyakovd31c7b82007-11-30 23:36:08 +11002976 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2977 idev = ipv6_add_dev(dev);
2978 if (idev)
2979 break;
2980 }
2981
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002982 /*
2983 * MTU falled under IPV6_MIN_MTU.
2984 * Stop IPv6 on this interface.
2985 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002986
2987 case NETDEV_DOWN:
2988 case NETDEV_UNREGISTER:
2989 /*
2990 * Remove all addresses from this interface.
2991 */
2992 addrconf_ifdown(dev, event != NETDEV_DOWN);
2993 break;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002994
Linus Torvalds1da177e2005-04-16 15:20:36 -07002995 case NETDEV_CHANGENAME:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002996 if (idev) {
Stephen Hemminger5632c512007-04-28 21:16:39 -07002997 snmp6_unregister_dev(idev);
Pavel Emelyanov408c4762008-01-10 17:41:21 -08002998 addrconf_sysctl_unregister(idev);
Pavel Emelyanovf52295a2007-12-02 00:58:37 +11002999 addrconf_sysctl_register(idev);
Herbert Xub217d612007-07-30 17:04:52 -07003000 err = snmp6_register_dev(idev);
3001 if (err)
3002 return notifier_from_errno(err);
Stephen Hemminger5632c512007-04-28 21:16:39 -07003003 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003004 break;
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003005
Jiri Pirko93d9b7d2010-03-10 10:28:56 +00003006 case NETDEV_PRE_TYPE_CHANGE:
3007 case NETDEV_POST_TYPE_CHANGE:
3008 addrconf_type_change(dev, event);
Moni Shoua75c78502009-09-15 02:37:40 -07003009 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07003010 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003011
3012 return NOTIFY_OK;
3013}
3014
3015/*
3016 * addrconf module should be notified of a device going up
3017 */
3018static struct notifier_block ipv6_dev_notf = {
3019 .notifier_call = addrconf_notify,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003020};
3021
Jiri Pirko93d9b7d2010-03-10 10:28:56 +00003022static void addrconf_type_change(struct net_device *dev, unsigned long event)
Moni Shoua75c78502009-09-15 02:37:40 -07003023{
3024 struct inet6_dev *idev;
3025 ASSERT_RTNL();
3026
3027 idev = __in6_dev_get(dev);
3028
Jiri Pirko93d9b7d2010-03-10 10:28:56 +00003029 if (event == NETDEV_POST_TYPE_CHANGE)
Moni Shoua75c78502009-09-15 02:37:40 -07003030 ipv6_mc_remap(idev);
Jiri Pirko93d9b7d2010-03-10 10:28:56 +00003031 else if (event == NETDEV_PRE_TYPE_CHANGE)
Moni Shoua75c78502009-09-15 02:37:40 -07003032 ipv6_mc_unmap(idev);
3033}
3034
Linus Torvalds1da177e2005-04-16 15:20:36 -07003035static int addrconf_ifdown(struct net_device *dev, int how)
3036{
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09003037 struct net *net = dev_net(dev);
stephen hemminger502a2ff2010-03-17 20:31:13 +00003038 struct inet6_dev *idev;
3039 struct inet6_ifaddr *ifa;
David S. Miller73a8bd72011-01-23 23:27:15 -08003040 int state, i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003041
3042 ASSERT_RTNL();
3043
David S. Miller73a8bd72011-01-23 23:27:15 -08003044 rt6_ifdown(net, dev);
3045 neigh_ifdown(&nd_tbl, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003046
3047 idev = __in6_dev_get(dev);
3048 if (idev == NULL)
3049 return -ENODEV;
3050
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003051 /*
3052 * Step 1: remove reference to ipv6 device from parent device.
3053 * Do not dev_put!
Linus Torvalds1da177e2005-04-16 15:20:36 -07003054 */
Denis V. Lunev439e2382008-04-03 13:30:17 -07003055 if (how) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003056 idev->dead = 1;
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07003057
3058 /* protected by rtnl_lock */
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +00003059 RCU_INIT_POINTER(dev->ip6_ptr, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003060
3061 /* Step 1.5: remove snmp6 entry */
3062 snmp6_unregister_dev(idev);
3063
3064 }
3065
David S. Miller73a8bd72011-01-23 23:27:15 -08003066 /* Step 2: clear hash table */
3067 for (i = 0; i < IN6_ADDR_HSIZE; i++) {
3068 struct hlist_head *h = &inet6_addr_lst[i];
David S. Miller73a8bd72011-01-23 23:27:15 -08003069
3070 spin_lock_bh(&addrconf_hash_lock);
3071 restart:
Sasha Levinb67bfe02013-02-27 17:06:00 -08003072 hlist_for_each_entry_rcu(ifa, h, addr_lst) {
David S. Miller73a8bd72011-01-23 23:27:15 -08003073 if (ifa->idev == idev) {
3074 hlist_del_init_rcu(&ifa->addr_lst);
3075 addrconf_del_timer(ifa);
3076 goto restart;
3077 }
3078 }
3079 spin_unlock_bh(&addrconf_hash_lock);
3080 }
3081
Linus Torvalds1da177e2005-04-16 15:20:36 -07003082 write_lock_bh(&idev->lock);
3083
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003084 /* Step 2: clear flags for stateless addrconf */
Denis V. Lunev439e2382008-04-03 13:30:17 -07003085 if (!how)
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003086 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003087
Linus Torvalds1da177e2005-04-16 15:20:36 -07003088#ifdef CONFIG_IPV6_PRIVACY
Denis V. Lunev439e2382008-04-03 13:30:17 -07003089 if (how && del_timer(&idev->regen_timer))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003090 in6_dev_put(idev);
3091
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003092 /* Step 3: clear tempaddr list */
stephen hemminger372e6c82010-03-17 20:31:09 +00003093 while (!list_empty(&idev->tempaddr_list)) {
3094 ifa = list_first_entry(&idev->tempaddr_list,
3095 struct inet6_ifaddr, tmp_list);
3096 list_del(&ifa->tmp_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003097 write_unlock_bh(&idev->lock);
3098 spin_lock_bh(&ifa->lock);
3099
3100 if (ifa->ifpub) {
3101 in6_ifa_put(ifa->ifpub);
3102 ifa->ifpub = NULL;
3103 }
3104 spin_unlock_bh(&ifa->lock);
3105 in6_ifa_put(ifa);
3106 write_lock_bh(&idev->lock);
3107 }
3108#endif
stephen hemminger8f37ada2010-03-03 08:19:59 +00003109
stephen hemminger502a2ff2010-03-17 20:31:13 +00003110 while (!list_empty(&idev->addr_list)) {
3111 ifa = list_first_entry(&idev->addr_list,
3112 struct inet6_ifaddr, if_list);
stephen hemminger84e8b802010-03-02 13:32:46 +00003113 addrconf_del_timer(ifa);
3114
David S. Miller73a8bd72011-01-23 23:27:15 -08003115 list_del(&ifa->if_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003116
David S. Miller73a8bd72011-01-23 23:27:15 -08003117 write_unlock_bh(&idev->lock);
stephen hemminger84e8b802010-03-02 13:32:46 +00003118
David S. Miller73a8bd72011-01-23 23:27:15 -08003119 spin_lock_bh(&ifa->state_lock);
3120 state = ifa->state;
3121 ifa->state = INET6_IFADDR_STATE_DEAD;
3122 spin_unlock_bh(&ifa->state_lock);
stephen hemminger84e8b802010-03-02 13:32:46 +00003123
David S. Miller73a8bd72011-01-23 23:27:15 -08003124 if (state != INET6_IFADDR_STATE_DEAD) {
3125 __ipv6_ifa_notify(RTM_DELADDR, ifa);
Cong Wangf88c91d2013-04-14 23:18:43 +08003126 inet6addr_notifier_call_chain(NETDEV_DOWN, ifa);
stephen hemminger27bdb2a2010-04-12 05:41:32 +00003127 }
David S. Miller73a8bd72011-01-23 23:27:15 -08003128 in6_ifa_put(ifa);
stephen hemminger8f37ada2010-03-03 08:19:59 +00003129
David S. Miller73a8bd72011-01-23 23:27:15 -08003130 write_lock_bh(&idev->lock);
3131 }
stephen hemminger8f37ada2010-03-03 08:19:59 +00003132
Linus Torvalds1da177e2005-04-16 15:20:36 -07003133 write_unlock_bh(&idev->lock);
3134
3135 /* Step 5: Discard multicast list */
Denis V. Lunev439e2382008-04-03 13:30:17 -07003136 if (how)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003137 ipv6_mc_destroy_dev(idev);
3138 else
3139 ipv6_mc_down(idev);
3140
Linus Torvalds1da177e2005-04-16 15:20:36 -07003141 idev->tstamp = jiffies;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003142
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003143 /* Last: Shot the device (if unregistered) */
Denis V. Lunev439e2382008-04-03 13:30:17 -07003144 if (how) {
Pavel Emelyanov408c4762008-01-10 17:41:21 -08003145 addrconf_sysctl_unregister(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003146 neigh_parms_release(&nd_tbl, idev->nd_parms);
3147 neigh_ifdown(&nd_tbl, dev);
3148 in6_dev_put(idev);
3149 }
3150 return 0;
3151}
3152
3153static void addrconf_rs_timer(unsigned long data)
3154{
3155 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
stephen hemminger5b2a1952010-03-02 13:32:45 +00003156 struct inet6_dev *idev = ifp->idev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003157
stephen hemminger5b2a1952010-03-02 13:32:45 +00003158 read_lock(&idev->lock);
3159 if (idev->dead || !(idev->if_flags & IF_READY))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003160 goto out;
3161
Shmulik Ladkani9ba2add2012-12-02 01:44:53 +00003162 if (!ipv6_accept_ra(idev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003163 goto out;
stephen hemminger5b2a1952010-03-02 13:32:45 +00003164
3165 /* Announcement received after solicitation was sent */
3166 if (idev->if_flags & IF_RA_RCVD)
3167 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003168
3169 spin_lock(&ifp->lock);
stephen hemminger5b2a1952010-03-02 13:32:45 +00003170 if (ifp->probes++ < idev->cnf.rtr_solicits) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003171 /* The wait after the last probe can be shorter */
3172 addrconf_mod_timer(ifp, AC_RS,
stephen hemminger5b2a1952010-03-02 13:32:45 +00003173 (ifp->probes == idev->cnf.rtr_solicits) ?
3174 idev->cnf.rtr_solicit_delay :
3175 idev->cnf.rtr_solicit_interval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003176 spin_unlock(&ifp->lock);
3177
stephen hemminger5b2a1952010-03-02 13:32:45 +00003178 ndisc_send_rs(idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003179 } else {
3180 spin_unlock(&ifp->lock);
3181 /*
3182 * Note: we do not support deprecated "all on-link"
3183 * assumption any longer.
3184 */
Joe Perches91df42b2012-05-15 14:11:54 +00003185 pr_debug("%s: no IPv6 routers present\n", idev->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003186 }
3187
3188out:
stephen hemminger5b2a1952010-03-02 13:32:45 +00003189 read_unlock(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003190 in6_ifa_put(ifp);
3191}
3192
3193/*
3194 * Duplicate Address Detection
3195 */
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003196static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
3197{
3198 unsigned long rand_num;
3199 struct inet6_dev *idev = ifp->idev;
3200
Neil Horman95c385b2007-04-25 17:08:10 -07003201 if (ifp->flags & IFA_F_OPTIMISTIC)
3202 rand_num = 0;
3203 else
3204 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
3205
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003206 ifp->probes = idev->cnf.dad_transmits;
3207 addrconf_mod_timer(ifp, AC_DAD, rand_num);
3208}
3209
David S. Millercf22f9a2012-04-14 21:37:40 -04003210static void addrconf_dad_start(struct inet6_ifaddr *ifp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003211{
3212 struct inet6_dev *idev = ifp->idev;
3213 struct net_device *dev = idev->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003214
3215 addrconf_join_solict(dev, &ifp->addr);
3216
Linus Torvalds1da177e2005-04-16 15:20:36 -07003217 net_srandom(ifp->addr.s6_addr32[3]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003218
3219 read_lock_bh(&idev->lock);
Herbert Xu622ccdf2010-05-18 15:56:06 -07003220 spin_lock(&ifp->lock);
Herbert Xue9d3e082010-05-18 15:36:06 -07003221 if (ifp->state == INET6_IFADDR_STATE_DEAD)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003222 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003223
3224 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09003225 idev->cnf.accept_dad < 1 ||
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003226 !(ifp->flags&IFA_F_TENTATIVE) ||
3227 ifp->flags & IFA_F_NODAD) {
Brian Haleycc411d02009-09-09 14:41:32 +00003228 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED);
stephen hemminger21809fa2010-02-08 19:48:52 +00003229 spin_unlock(&ifp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003230 read_unlock_bh(&idev->lock);
3231
3232 addrconf_dad_completed(ifp);
3233 return;
3234 }
3235
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08003236 if (!(idev->if_flags & IF_READY)) {
stephen hemminger21809fa2010-02-08 19:48:52 +00003237 spin_unlock(&ifp->lock);
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08003238 read_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003239 /*
Masatake YAMATO590a9882009-06-09 10:41:12 +09003240 * If the device is not ready:
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003241 * - keep it tentative if it is a permanent address.
3242 * - otherwise, kill it.
3243 */
3244 in6_ifa_hold(ifp);
Brian Haleycc411d02009-09-09 14:41:32 +00003245 addrconf_dad_stop(ifp, 0);
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08003246 return;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003247 }
Neil Horman95c385b2007-04-25 17:08:10 -07003248
3249 /*
3250 * Optimistic nodes can start receiving
3251 * Frames right away
3252 */
Stephen Hemmingere21e8462010-03-20 16:09:01 -07003253 if (ifp->flags & IFA_F_OPTIMISTIC)
Neil Horman95c385b2007-04-25 17:08:10 -07003254 ip6_ins_rt(ifp->rt);
3255
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08003256 addrconf_dad_kick(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003257out:
Herbert Xu622ccdf2010-05-18 15:56:06 -07003258 spin_unlock(&ifp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003259 read_unlock_bh(&idev->lock);
3260}
3261
3262static void addrconf_dad_timer(unsigned long data)
3263{
3264 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
3265 struct inet6_dev *idev = ifp->idev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003266 struct in6_addr mcaddr;
3267
Herbert Xuf2344a12010-05-18 15:55:27 -07003268 if (!ifp->probes && addrconf_dad_end(ifp))
3269 goto out;
3270
stephen hemminger122e4512010-03-02 13:32:44 +00003271 read_lock(&idev->lock);
3272 if (idev->dead || !(idev->if_flags & IF_READY)) {
3273 read_unlock(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003274 goto out;
3275 }
stephen hemminger21809fa2010-02-08 19:48:52 +00003276
3277 spin_lock(&ifp->lock);
Herbert Xu622ccdf2010-05-18 15:56:06 -07003278 if (ifp->state == INET6_IFADDR_STATE_DEAD) {
3279 spin_unlock(&ifp->lock);
3280 read_unlock(&idev->lock);
3281 goto out;
3282 }
3283
Linus Torvalds1da177e2005-04-16 15:20:36 -07003284 if (ifp->probes == 0) {
3285 /*
3286 * DAD was successful
3287 */
3288
Brian Haleycc411d02009-09-09 14:41:32 +00003289 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED);
stephen hemminger21809fa2010-02-08 19:48:52 +00003290 spin_unlock(&ifp->lock);
stephen hemminger122e4512010-03-02 13:32:44 +00003291 read_unlock(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003292
3293 addrconf_dad_completed(ifp);
3294
3295 goto out;
3296 }
3297
3298 ifp->probes--;
3299 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
stephen hemminger21809fa2010-02-08 19:48:52 +00003300 spin_unlock(&ifp->lock);
stephen hemminger122e4512010-03-02 13:32:44 +00003301 read_unlock(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003302
3303 /* send a neighbour solicitation for our addr */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003304 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
YOSHIFUJI Hideakid7aabf22008-04-10 15:42:11 +09003305 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003306out:
3307 in6_ifa_put(ifp);
3308}
3309
3310static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
3311{
Stephen Hemmingere21e8462010-03-20 16:09:01 -07003312 struct net_device *dev = ifp->idev->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003313
3314 /*
3315 * Configure the address for reception. Now it is valid.
3316 */
3317
3318 ipv6_ifa_notify(RTM_NEWADDR, ifp);
3319
Tore Anderson026359b2011-08-28 23:47:33 +00003320 /* If added prefix is link local and we are prepared to process
3321 router advertisements, start sending router solicitations.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003322 */
3323
Shmulik Ladkaniaeaf6e92012-11-30 10:25:59 +00003324 if (ipv6_accept_ra(ifp->idev) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07003325 ifp->idev->cnf.rtr_solicits > 0 &&
3326 (dev->flags&IFF_LOOPBACK) == 0 &&
3327 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003328 /*
3329 * If a host as already performed a random delay
3330 * [...] as part of DAD [...] there is no need
3331 * to delay again before sending the first RS
3332 */
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +09003333 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003334
3335 spin_lock_bh(&ifp->lock);
3336 ifp->probes = 1;
3337 ifp->idev->if_flags |= IF_RS_SENT;
3338 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
3339 spin_unlock_bh(&ifp->lock);
3340 }
3341}
3342
Stephen Hemmingere21e8462010-03-20 16:09:01 -07003343static void addrconf_dad_run(struct inet6_dev *idev)
3344{
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09003345 struct inet6_ifaddr *ifp;
3346
3347 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00003348 list_for_each_entry(ifp, &idev->addr_list, if_list) {
stephen hemminger21809fa2010-02-08 19:48:52 +00003349 spin_lock(&ifp->lock);
Herbert Xuf2344a12010-05-18 15:55:27 -07003350 if (ifp->flags & IFA_F_TENTATIVE &&
3351 ifp->state == INET6_IFADDR_STATE_DAD)
3352 addrconf_dad_kick(ifp);
stephen hemminger21809fa2010-02-08 19:48:52 +00003353 spin_unlock(&ifp->lock);
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09003354 }
3355 read_unlock_bh(&idev->lock);
3356}
3357
Linus Torvalds1da177e2005-04-16 15:20:36 -07003358#ifdef CONFIG_PROC_FS
3359struct if6_iter_state {
Daniel Lezcano3c400902008-01-10 22:42:49 -08003360 struct seq_net_private p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003361 int bucket;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003362 int offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003363};
3364
Mihai Maruseac1d578302012-01-03 23:31:35 +00003365static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003366{
3367 struct inet6_ifaddr *ifa = NULL;
3368 struct if6_iter_state *state = seq->private;
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +09003369 struct net *net = seq_file_net(seq);
Mihai Maruseac1d578302012-01-03 23:31:35 +00003370 int p = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003371
Mihai Maruseac1d578302012-01-03 23:31:35 +00003372 /* initial bucket if pos is 0 */
3373 if (pos == 0) {
3374 state->bucket = 0;
3375 state->offset = 0;
3376 }
3377
3378 for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
Sasha Levinb67bfe02013-02-27 17:06:00 -08003379 hlist_for_each_entry_rcu_bh(ifa, &inet6_addr_lst[state->bucket],
Mihai Maruseac1d578302012-01-03 23:31:35 +00003380 addr_lst) {
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003381 if (!net_eq(dev_net(ifa->idev->dev), net))
3382 continue;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003383 /* sync with offset */
3384 if (p < state->offset) {
3385 p++;
3386 continue;
3387 }
3388 state->offset++;
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003389 return ifa;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003390 }
3391
3392 /* prepare for next bucket */
3393 state->offset = 0;
3394 p = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003395 }
stephen hemmingerc2e21292010-03-17 20:31:10 +00003396 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003397}
3398
stephen hemmingerc2e21292010-03-17 20:31:10 +00003399static struct inet6_ifaddr *if6_get_next(struct seq_file *seq,
3400 struct inet6_ifaddr *ifa)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003401{
3402 struct if6_iter_state *state = seq->private;
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +09003403 struct net *net = seq_file_net(seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003404
Sasha Levinb67bfe02013-02-27 17:06:00 -08003405 hlist_for_each_entry_continue_rcu_bh(ifa, addr_lst) {
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003406 if (!net_eq(dev_net(ifa->idev->dev), net))
3407 continue;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003408 state->offset++;
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003409 return ifa;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003410 }
stephen hemmingerc2e21292010-03-17 20:31:10 +00003411
3412 while (++state->bucket < IN6_ADDR_HSIZE) {
Mihai Maruseac1d578302012-01-03 23:31:35 +00003413 state->offset = 0;
Sasha Levinb67bfe02013-02-27 17:06:00 -08003414 hlist_for_each_entry_rcu_bh(ifa,
stephen hemmingerc2e21292010-03-17 20:31:10 +00003415 &inet6_addr_lst[state->bucket], addr_lst) {
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003416 if (!net_eq(dev_net(ifa->idev->dev), net))
3417 continue;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003418 state->offset++;
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003419 return ifa;
Daniel Lezcano3c400902008-01-10 22:42:49 -08003420 }
3421 }
3422
stephen hemmingerc2e21292010-03-17 20:31:10 +00003423 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003424}
3425
Linus Torvalds1da177e2005-04-16 15:20:36 -07003426static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
Eric Dumazet4f70ecc2010-05-03 10:50:14 +00003427 __acquires(rcu_bh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003428{
stephen hemminger5c578aed2010-03-17 20:31:11 +00003429 rcu_read_lock_bh();
Mihai Maruseac1d578302012-01-03 23:31:35 +00003430 return if6_get_first(seq, *pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003431}
3432
3433static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
3434{
3435 struct inet6_ifaddr *ifa;
3436
3437 ifa = if6_get_next(seq, v);
3438 ++*pos;
3439 return ifa;
3440}
3441
3442static void if6_seq_stop(struct seq_file *seq, void *v)
Eric Dumazet4f70ecc2010-05-03 10:50:14 +00003443 __releases(rcu_bh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003444{
stephen hemminger5c578aed2010-03-17 20:31:11 +00003445 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003446}
3447
3448static int if6_seq_show(struct seq_file *seq, void *v)
3449{
3450 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
Harvey Harrison4b7a4272008-10-29 12:50:24 -07003451 seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n",
Harvey Harrisonb0711952008-10-28 16:05:40 -07003452 &ifp->addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003453 ifp->idev->dev->ifindex,
3454 ifp->prefix_len,
3455 ifp->scope,
3456 ifp->flags,
3457 ifp->idev->dev->name);
3458 return 0;
3459}
3460
Philippe De Muyter56b3d972007-07-10 23:07:31 -07003461static const struct seq_operations if6_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003462 .start = if6_seq_start,
3463 .next = if6_seq_next,
3464 .show = if6_seq_show,
3465 .stop = if6_seq_stop,
3466};
3467
3468static int if6_seq_open(struct inode *inode, struct file *file)
3469{
Daniel Lezcano3c400902008-01-10 22:42:49 -08003470 return seq_open_net(inode, file, &if6_seq_ops,
3471 sizeof(struct if6_iter_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003472}
3473
Arjan van de Ven9a321442007-02-12 00:55:35 -08003474static const struct file_operations if6_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003475 .owner = THIS_MODULE,
3476 .open = if6_seq_open,
3477 .read = seq_read,
3478 .llseek = seq_lseek,
Daniel Lezcano3c400902008-01-10 22:42:49 -08003479 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003480};
3481
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00003482static int __net_init if6_proc_net_init(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003483{
Gao fengd4beaa62013-02-18 01:34:54 +00003484 if (!proc_create("if_inet6", S_IRUGO, net->proc_net, &if6_fops))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003485 return -ENOMEM;
3486 return 0;
3487}
3488
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00003489static void __net_exit if6_proc_net_exit(struct net *net)
Daniel Lezcano3c400902008-01-10 22:42:49 -08003490{
Gao fengece31ff2013-02-18 01:34:56 +00003491 remove_proc_entry("if_inet6", net->proc_net);
Daniel Lezcano3c400902008-01-10 22:42:49 -08003492}
3493
3494static struct pernet_operations if6_proc_net_ops = {
3495 .init = if6_proc_net_init,
3496 .exit = if6_proc_net_exit,
3497};
3498
3499int __init if6_proc_init(void)
3500{
3501 return register_pernet_subsys(&if6_proc_net_ops);
3502}
3503
Linus Torvalds1da177e2005-04-16 15:20:36 -07003504void if6_proc_exit(void)
3505{
Daniel Lezcano3c400902008-01-10 22:42:49 -08003506 unregister_pernet_subsys(&if6_proc_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003507}
3508#endif /* CONFIG_PROC_FS */
3509
Amerigo Wang07a93622012-10-29 16:23:10 +00003510#if IS_ENABLED(CONFIG_IPV6_MIP6)
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003511/* Check if address is a home address configured on any interface. */
Eric Dumazetb71d1d42011-04-22 04:53:02 +00003512int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr)
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003513{
3514 int ret = 0;
stephen hemmingerc2e21292010-03-17 20:31:10 +00003515 struct inet6_ifaddr *ifp = NULL;
Eric Dumazetddbe5032012-07-18 08:11:12 +00003516 unsigned int hash = inet6_addr_hash(addr);
stephen hemmingerc2e21292010-03-17 20:31:10 +00003517
stephen hemminger5c578aed2010-03-17 20:31:11 +00003518 rcu_read_lock_bh();
Sasha Levinb67bfe02013-02-27 17:06:00 -08003519 hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09003520 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcano389f6612008-01-10 22:44:40 -08003521 continue;
YOSHIFUJI Hideakicaad2952008-04-10 15:42:07 +09003522 if (ipv6_addr_equal(&ifp->addr, addr) &&
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003523 (ifp->flags & IFA_F_HOMEADDRESS)) {
3524 ret = 1;
3525 break;
3526 }
3527 }
stephen hemminger5c578aed2010-03-17 20:31:11 +00003528 rcu_read_unlock_bh();
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003529 return ret;
3530}
3531#endif
3532
Linus Torvalds1da177e2005-04-16 15:20:36 -07003533/*
3534 * Periodic address status verification
3535 */
3536
3537static void addrconf_verify(unsigned long foo)
3538{
YOSHIFUJI Hideakib2db7562010-03-20 16:11:12 -07003539 unsigned long now, next, next_sec, next_sched;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003540 struct inet6_ifaddr *ifp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003541 int i;
3542
stephen hemminger5c578aed2010-03-17 20:31:11 +00003543 rcu_read_lock_bh();
3544 spin_lock(&addrconf_verify_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003545 now = jiffies;
YOSHIFUJI Hideakib2db7562010-03-20 16:11:12 -07003546 next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003547
3548 del_timer(&addr_chk_timer);
3549
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003550 for (i = 0; i < IN6_ADDR_HSIZE; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003551restart:
Sasha Levinb67bfe02013-02-27 17:06:00 -08003552 hlist_for_each_entry_rcu_bh(ifp,
stephen hemminger5c578aed2010-03-17 20:31:11 +00003553 &inet6_addr_lst[i], addr_lst) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003554 unsigned long age;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003555
3556 if (ifp->flags & IFA_F_PERMANENT)
3557 continue;
3558
3559 spin_lock(&ifp->lock);
YOSHIFUJI Hideakib2db7562010-03-20 16:11:12 -07003560 /* We try to batch several events at once. */
3561 age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003562
YOSHIFUJI Hideaki8f27ebb2006-07-28 18:12:11 +09003563 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
3564 age >= ifp->valid_lft) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003565 spin_unlock(&ifp->lock);
3566 in6_ifa_hold(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003567 ipv6_del_addr(ifp);
3568 goto restart;
YOSHIFUJI Hideaki8f27ebb2006-07-28 18:12:11 +09003569 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
3570 spin_unlock(&ifp->lock);
3571 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003572 } else if (age >= ifp->prefered_lft) {
Brian Haleya1ed0522009-07-02 07:10:52 +00003573 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003574 int deprecate = 0;
3575
3576 if (!(ifp->flags&IFA_F_DEPRECATED)) {
3577 deprecate = 1;
3578 ifp->flags |= IFA_F_DEPRECATED;
3579 }
3580
3581 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
3582 next = ifp->tstamp + ifp->valid_lft * HZ;
3583
3584 spin_unlock(&ifp->lock);
3585
3586 if (deprecate) {
3587 in6_ifa_hold(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003588
3589 ipv6_ifa_notify(0, ifp);
3590 in6_ifa_put(ifp);
3591 goto restart;
3592 }
3593#ifdef CONFIG_IPV6_PRIVACY
3594 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
3595 !(ifp->flags&IFA_F_TENTATIVE)) {
stephen hemminger88949cf2010-03-17 20:31:17 +00003596 unsigned long regen_advance = ifp->idev->cnf.regen_max_retry *
3597 ifp->idev->cnf.dad_transmits *
3598 ifp->idev->nd_parms->retrans_time / HZ;
3599
Linus Torvalds1da177e2005-04-16 15:20:36 -07003600 if (age >= ifp->prefered_lft - regen_advance) {
3601 struct inet6_ifaddr *ifpub = ifp->ifpub;
3602 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3603 next = ifp->tstamp + ifp->prefered_lft * HZ;
3604 if (!ifp->regen_count && ifpub) {
3605 ifp->regen_count++;
3606 in6_ifa_hold(ifp);
3607 in6_ifa_hold(ifpub);
3608 spin_unlock(&ifp->lock);
stephen hemminger5c578aed2010-03-17 20:31:11 +00003609
Hiroyuki YAMAMORI291d8092005-12-23 11:24:05 -08003610 spin_lock(&ifpub->lock);
3611 ifpub->regen_count = 0;
3612 spin_unlock(&ifpub->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003613 ipv6_create_tempaddr(ifpub, ifp);
3614 in6_ifa_put(ifpub);
3615 in6_ifa_put(ifp);
3616 goto restart;
3617 }
3618 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
3619 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
3620 spin_unlock(&ifp->lock);
3621#endif
3622 } else {
3623 /* ifp->prefered_lft <= ifp->valid_lft */
3624 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3625 next = ifp->tstamp + ifp->prefered_lft * HZ;
3626 spin_unlock(&ifp->lock);
3627 }
3628 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003629 }
3630
YOSHIFUJI Hideakib2db7562010-03-20 16:11:12 -07003631 next_sec = round_jiffies_up(next);
3632 next_sched = next;
3633
3634 /* If rounded timeout is accurate enough, accept it. */
3635 if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ))
3636 next_sched = next_sec;
3637
3638 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
3639 if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX))
3640 next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX;
3641
3642 ADBG((KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
3643 now, next, next_sec, next_sched));
3644
3645 addr_chk_timer.expires = next_sched;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003646 add_timer(&addr_chk_timer);
stephen hemminger5c578aed2010-03-17 20:31:11 +00003647 spin_unlock(&addrconf_verify_lock);
3648 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003649}
3650
Thomas Graf461d8832006-09-18 00:09:49 -07003651static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
3652{
3653 struct in6_addr *pfx = NULL;
3654
3655 if (addr)
3656 pfx = nla_data(addr);
3657
3658 if (local) {
3659 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
3660 pfx = NULL;
3661 else
3662 pfx = nla_data(local);
3663 }
3664
3665 return pfx;
3666}
3667
Patrick McHardyef7c79e2007-06-05 12:38:30 -07003668static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
Thomas Graf461d8832006-09-18 00:09:49 -07003669 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
3670 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
3671 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
3672};
3673
Linus Torvalds1da177e2005-04-16 15:20:36 -07003674static int
Thomas Graf661d2962013-03-21 07:45:29 +00003675inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003676{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09003677 struct net *net = sock_net(skb->sk);
Thomas Grafb933f712006-09-18 00:10:19 -07003678 struct ifaddrmsg *ifm;
3679 struct nlattr *tb[IFA_MAX+1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07003680 struct in6_addr *pfx;
Thomas Grafb933f712006-09-18 00:10:19 -07003681 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003682
Thomas Grafb933f712006-09-18 00:10:19 -07003683 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3684 if (err < 0)
3685 return err;
3686
3687 ifm = nlmsg_data(nlh);
3688 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003689 if (pfx == NULL)
3690 return -EINVAL;
3691
Daniel Lezcanoaf284932008-03-05 10:46:57 -08003692 return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003693}
3694
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003695static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
3696 u32 prefered_lft, u32 valid_lft)
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003697{
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07003698 u32 flags;
3699 clock_t expires;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09003700 unsigned long timeout;
YOSHIFUJI Hideaki46d48042007-02-07 20:36:26 +09003701
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003702 if (!valid_lft || (prefered_lft > valid_lft))
3703 return -EINVAL;
3704
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09003705 timeout = addrconf_timeout_fixup(valid_lft, HZ);
3706 if (addrconf_finite_timeout(timeout)) {
3707 expires = jiffies_to_clock_t(timeout * HZ);
3708 valid_lft = timeout;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07003709 flags = RTF_EXPIRES;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09003710 } else {
3711 expires = 0;
3712 flags = 0;
3713 ifa_flags |= IFA_F_PERMANENT;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07003714 }
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003715
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09003716 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
3717 if (addrconf_finite_timeout(timeout)) {
3718 if (timeout == 0)
3719 ifa_flags |= IFA_F_DEPRECATED;
3720 prefered_lft = timeout;
3721 }
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003722
3723 spin_lock_bh(&ifp->lock);
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003724 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 +09003725 ifp->tstamp = jiffies;
3726 ifp->valid_lft = valid_lft;
3727 ifp->prefered_lft = prefered_lft;
3728
3729 spin_unlock_bh(&ifp->lock);
3730 if (!(ifp->flags&IFA_F_TENTATIVE))
3731 ipv6_ifa_notify(0, ifp);
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003732
YOSHIFUJI Hideaki46d48042007-02-07 20:36:26 +09003733 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07003734 expires, flags);
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003735 addrconf_verify(0);
3736
3737 return 0;
3738}
3739
3740static int
Thomas Graf661d2962013-03-21 07:45:29 +00003741inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003742{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09003743 struct net *net = sock_net(skb->sk);
Thomas Graf461d8832006-09-18 00:09:49 -07003744 struct ifaddrmsg *ifm;
3745 struct nlattr *tb[IFA_MAX+1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07003746 struct in6_addr *pfx;
Thomas Graf7198f8c2006-09-18 00:13:46 -07003747 struct inet6_ifaddr *ifa;
3748 struct net_device *dev;
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003749 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
3750 u8 ifa_flags;
Thomas Graf461d8832006-09-18 00:09:49 -07003751 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003752
Thomas Graf461d8832006-09-18 00:09:49 -07003753 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3754 if (err < 0)
3755 return err;
3756
3757 ifm = nlmsg_data(nlh);
3758 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003759 if (pfx == NULL)
3760 return -EINVAL;
3761
Thomas Graf461d8832006-09-18 00:09:49 -07003762 if (tb[IFA_CACHEINFO]) {
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09003763 struct ifa_cacheinfo *ci;
Thomas Graf461d8832006-09-18 00:09:49 -07003764
3765 ci = nla_data(tb[IFA_CACHEINFO]);
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09003766 valid_lft = ci->ifa_valid;
Thomas Graf461d8832006-09-18 00:09:49 -07003767 preferred_lft = ci->ifa_prefered;
3768 } else {
3769 preferred_lft = INFINITY_LIFE_TIME;
3770 valid_lft = INFINITY_LIFE_TIME;
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09003771 }
3772
Daniel Lezcanoaf284932008-03-05 10:46:57 -08003773 dev = __dev_get_by_index(net, ifm->ifa_index);
Thomas Graf7198f8c2006-09-18 00:13:46 -07003774 if (dev == NULL)
3775 return -ENODEV;
3776
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003777 /* We ignore other flags so far. */
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003778 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003779
Daniel Lezcano1cab3da2008-01-10 22:44:09 -08003780 ifa = ipv6_get_ifaddr(net, pfx, dev, 1);
Thomas Graf7198f8c2006-09-18 00:13:46 -07003781 if (ifa == NULL) {
3782 /*
3783 * It would be best to check for !NLM_F_CREATE here but
3784 * userspace alreay relies on not having to provide this.
3785 */
Daniel Lezcanoaf284932008-03-05 10:46:57 -08003786 return inet6_addr_add(net, ifm->ifa_index, pfx,
3787 ifm->ifa_prefixlen, ifa_flags,
3788 preferred_lft, valid_lft);
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003789 }
3790
Thomas Graf7198f8c2006-09-18 00:13:46 -07003791 if (nlh->nlmsg_flags & NLM_F_EXCL ||
3792 !(nlh->nlmsg_flags & NLM_F_REPLACE))
3793 err = -EEXIST;
3794 else
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003795 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
Thomas Graf7198f8c2006-09-18 00:13:46 -07003796
3797 in6_ifa_put(ifa);
3798
3799 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003800}
3801
Thomas Graf101bb222006-09-18 00:11:52 -07003802static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3803 u8 scope, int ifindex)
3804{
3805 struct ifaddrmsg *ifm;
3806
3807 ifm = nlmsg_data(nlh);
3808 ifm->ifa_family = AF_INET6;
3809 ifm->ifa_prefixlen = prefixlen;
3810 ifm->ifa_flags = flags;
3811 ifm->ifa_scope = scope;
3812 ifm->ifa_index = ifindex;
3813}
3814
Thomas Graf85486af2006-09-18 00:11:24 -07003815static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3816 unsigned long tstamp, u32 preferred, u32 valid)
3817{
3818 struct ifa_cacheinfo ci;
3819
Thomas Graf18a31e12010-11-17 04:12:02 +00003820 ci.cstamp = cstamp_delta(cstamp);
3821 ci.tstamp = cstamp_delta(tstamp);
Thomas Graf85486af2006-09-18 00:11:24 -07003822 ci.ifa_prefered = preferred;
3823 ci.ifa_valid = valid;
3824
3825 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3826}
3827
Thomas Graf101bb222006-09-18 00:11:52 -07003828static inline int rt_scope(int ifa_scope)
3829{
3830 if (ifa_scope & IFA_HOST)
3831 return RT_SCOPE_HOST;
3832 else if (ifa_scope & IFA_LINK)
3833 return RT_SCOPE_LINK;
3834 else if (ifa_scope & IFA_SITE)
3835 return RT_SCOPE_SITE;
3836 else
3837 return RT_SCOPE_UNIVERSE;
3838}
3839
Thomas Graf0ab68032006-09-18 00:12:35 -07003840static inline int inet6_ifaddr_msgsize(void)
3841{
Thomas Graf339bf982006-11-10 14:10:15 -08003842 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3843 + nla_total_size(16) /* IFA_ADDRESS */
3844 + nla_total_size(sizeof(struct ifa_cacheinfo));
Thomas Graf0ab68032006-09-18 00:12:35 -07003845}
YOSHIFUJI Hideakic5396a32006-06-17 22:48:48 -07003846
Linus Torvalds1da177e2005-04-16 15:20:36 -07003847static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
Eric W. Biederman15e47302012-09-07 20:12:54 +00003848 u32 portid, u32 seq, int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003849{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003850 struct nlmsghdr *nlh;
Thomas Graf85486af2006-09-18 00:11:24 -07003851 u32 preferred, valid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003852
Eric W. Biederman15e47302012-09-07 20:12:54 +00003853 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags);
Thomas Graf0ab68032006-09-18 00:12:35 -07003854 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -08003855 return -EMSGSIZE;
Thomas Graf0ab68032006-09-18 00:12:35 -07003856
Thomas Graf101bb222006-09-18 00:11:52 -07003857 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3858 ifa->idev->dev->ifindex);
3859
Linus Torvalds1da177e2005-04-16 15:20:36 -07003860 if (!(ifa->flags&IFA_F_PERMANENT)) {
Thomas Graf85486af2006-09-18 00:11:24 -07003861 preferred = ifa->prefered_lft;
3862 valid = ifa->valid_lft;
3863 if (preferred != INFINITY_LIFE_TIME) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003864 long tval = (jiffies - ifa->tstamp)/HZ;
Jens Rosenbooma1faa692009-06-25 04:55:50 +00003865 if (preferred > tval)
3866 preferred -= tval;
3867 else
3868 preferred = 0;
Ben Hutchingsf56619f2010-06-26 11:37:47 +00003869 if (valid != INFINITY_LIFE_TIME) {
3870 if (valid > tval)
3871 valid -= tval;
3872 else
3873 valid = 0;
3874 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003875 }
3876 } else {
Thomas Graf85486af2006-09-18 00:11:24 -07003877 preferred = INFINITY_LIFE_TIME;
3878 valid = INFINITY_LIFE_TIME;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003879 }
Thomas Graf85486af2006-09-18 00:11:24 -07003880
Thomas Graf0ab68032006-09-18 00:12:35 -07003881 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
Patrick McHardy26932562007-01-31 23:16:40 -08003882 put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
3883 nlmsg_cancel(skb, nlh);
3884 return -EMSGSIZE;
3885 }
Thomas Graf85486af2006-09-18 00:11:24 -07003886
Thomas Graf0ab68032006-09-18 00:12:35 -07003887 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003888}
3889
3890static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
Eric W. Biederman15e47302012-09-07 20:12:54 +00003891 u32 portid, u32 seq, int event, u16 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003892{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003893 struct nlmsghdr *nlh;
Thomas Graf101bb222006-09-18 00:11:52 -07003894 u8 scope = RT_SCOPE_UNIVERSE;
3895 int ifindex = ifmca->idev->dev->ifindex;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003896
Thomas Graf101bb222006-09-18 00:11:52 -07003897 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3898 scope = RT_SCOPE_SITE;
3899
Eric W. Biederman15e47302012-09-07 20:12:54 +00003900 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags);
Thomas Graf0ab68032006-09-18 00:12:35 -07003901 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -08003902 return -EMSGSIZE;
Thomas Graf0ab68032006-09-18 00:12:35 -07003903
Thomas Graf101bb222006-09-18 00:11:52 -07003904 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
Thomas Graf0ab68032006-09-18 00:12:35 -07003905 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3906 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
Patrick McHardy26932562007-01-31 23:16:40 -08003907 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3908 nlmsg_cancel(skb, nlh);
3909 return -EMSGSIZE;
3910 }
Thomas Graf85486af2006-09-18 00:11:24 -07003911
Thomas Graf0ab68032006-09-18 00:12:35 -07003912 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003913}
3914
3915static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
Eric W. Biederman15e47302012-09-07 20:12:54 +00003916 u32 portid, u32 seq, int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003917{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003918 struct nlmsghdr *nlh;
Thomas Graf101bb222006-09-18 00:11:52 -07003919 u8 scope = RT_SCOPE_UNIVERSE;
3920 int ifindex = ifaca->aca_idev->dev->ifindex;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003921
Thomas Graf101bb222006-09-18 00:11:52 -07003922 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3923 scope = RT_SCOPE_SITE;
3924
Eric W. Biederman15e47302012-09-07 20:12:54 +00003925 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags);
Thomas Graf0ab68032006-09-18 00:12:35 -07003926 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -08003927 return -EMSGSIZE;
Thomas Graf0ab68032006-09-18 00:12:35 -07003928
Thomas Graf101bb222006-09-18 00:11:52 -07003929 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
Thomas Graf0ab68032006-09-18 00:12:35 -07003930 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3931 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
Patrick McHardy26932562007-01-31 23:16:40 -08003932 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3933 nlmsg_cancel(skb, nlh);
3934 return -EMSGSIZE;
3935 }
Thomas Graf85486af2006-09-18 00:11:24 -07003936
Thomas Graf0ab68032006-09-18 00:12:35 -07003937 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003938}
3939
Stephen Hemmingere21e8462010-03-20 16:09:01 -07003940enum addr_type_t {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003941 UNICAST_ADDR,
3942 MULTICAST_ADDR,
3943 ANYCAST_ADDR,
3944};
3945
Eric Dumazet234b27c2009-11-12 04:11:50 +00003946/* called with rcu_read_lock() */
3947static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb,
3948 struct netlink_callback *cb, enum addr_type_t type,
3949 int s_ip_idx, int *p_ip_idx)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003950{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003951 struct ifmcaddr6 *ifmca;
3952 struct ifacaddr6 *ifaca;
Eric Dumazet234b27c2009-11-12 04:11:50 +00003953 int err = 1;
3954 int ip_idx = *p_ip_idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003955
Eric Dumazet234b27c2009-11-12 04:11:50 +00003956 read_lock_bh(&idev->lock);
3957 switch (type) {
stephen hemminger502a2ff2010-03-17 20:31:13 +00003958 case UNICAST_ADDR: {
3959 struct inet6_ifaddr *ifa;
3960
Eric Dumazet234b27c2009-11-12 04:11:50 +00003961 /* unicast address incl. temp addr */
stephen hemminger502a2ff2010-03-17 20:31:13 +00003962 list_for_each_entry(ifa, &idev->addr_list, if_list) {
3963 if (++ip_idx < s_ip_idx)
Eric Dumazet234b27c2009-11-12 04:11:50 +00003964 continue;
3965 err = inet6_fill_ifaddr(skb, ifa,
Eric W. Biederman15e47302012-09-07 20:12:54 +00003966 NETLINK_CB(cb->skb).portid,
Eric Dumazet234b27c2009-11-12 04:11:50 +00003967 cb->nlh->nlmsg_seq,
3968 RTM_NEWADDR,
3969 NLM_F_MULTI);
3970 if (err <= 0)
3971 break;
Nicolas Dichtel63998ac2013-03-22 06:28:43 +00003972 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003973 }
Eric Dumazet234b27c2009-11-12 04:11:50 +00003974 break;
stephen hemminger502a2ff2010-03-17 20:31:13 +00003975 }
Eric Dumazet234b27c2009-11-12 04:11:50 +00003976 case MULTICAST_ADDR:
3977 /* multicast address */
3978 for (ifmca = idev->mc_list; ifmca;
3979 ifmca = ifmca->next, ip_idx++) {
3980 if (ip_idx < s_ip_idx)
3981 continue;
3982 err = inet6_fill_ifmcaddr(skb, ifmca,
Eric W. Biederman15e47302012-09-07 20:12:54 +00003983 NETLINK_CB(cb->skb).portid,
Eric Dumazet234b27c2009-11-12 04:11:50 +00003984 cb->nlh->nlmsg_seq,
3985 RTM_GETMULTICAST,
3986 NLM_F_MULTI);
3987 if (err <= 0)
3988 break;
3989 }
3990 break;
3991 case ANYCAST_ADDR:
3992 /* anycast address */
3993 for (ifaca = idev->ac_list; ifaca;
3994 ifaca = ifaca->aca_next, ip_idx++) {
3995 if (ip_idx < s_ip_idx)
3996 continue;
3997 err = inet6_fill_ifacaddr(skb, ifaca,
Eric W. Biederman15e47302012-09-07 20:12:54 +00003998 NETLINK_CB(cb->skb).portid,
Eric Dumazet234b27c2009-11-12 04:11:50 +00003999 cb->nlh->nlmsg_seq,
4000 RTM_GETANYCAST,
4001 NLM_F_MULTI);
4002 if (err <= 0)
4003 break;
4004 }
4005 break;
4006 default:
4007 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004008 }
Eric Dumazet234b27c2009-11-12 04:11:50 +00004009 read_unlock_bh(&idev->lock);
4010 *p_ip_idx = ip_idx;
4011 return err;
4012}
4013
4014static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
4015 enum addr_type_t type)
4016{
4017 struct net *net = sock_net(skb->sk);
4018 int h, s_h;
4019 int idx, ip_idx;
4020 int s_idx, s_ip_idx;
4021 struct net_device *dev;
4022 struct inet6_dev *idev;
4023 struct hlist_head *head;
Eric Dumazet234b27c2009-11-12 04:11:50 +00004024
4025 s_h = cb->args[0];
4026 s_idx = idx = cb->args[1];
4027 s_ip_idx = ip_idx = cb->args[2];
4028
4029 rcu_read_lock();
Nicolas Dichtel63998ac2013-03-22 06:28:43 +00004030 cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ net->dev_base_seq;
Eric Dumazet234b27c2009-11-12 04:11:50 +00004031 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4032 idx = 0;
4033 head = &net->dev_index_head[h];
Sasha Levinb67bfe02013-02-27 17:06:00 -08004034 hlist_for_each_entry_rcu(dev, head, index_hlist) {
Eric Dumazet234b27c2009-11-12 04:11:50 +00004035 if (idx < s_idx)
4036 goto cont;
Patrick McHardy4b97efd2010-03-26 20:27:49 -07004037 if (h > s_h || idx > s_idx)
Eric Dumazet234b27c2009-11-12 04:11:50 +00004038 s_ip_idx = 0;
4039 ip_idx = 0;
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004040 idev = __in6_dev_get(dev);
4041 if (!idev)
Eric Dumazet234b27c2009-11-12 04:11:50 +00004042 goto cont;
4043
4044 if (in6_dump_addrs(idev, skb, cb, type,
4045 s_ip_idx, &ip_idx) <= 0)
4046 goto done;
4047cont:
4048 idx++;
4049 }
4050 }
4051done:
4052 rcu_read_unlock();
4053 cb->args[0] = h;
4054 cb->args[1] = idx;
4055 cb->args[2] = ip_idx;
4056
Linus Torvalds1da177e2005-04-16 15:20:36 -07004057 return skb->len;
4058}
4059
4060static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
4061{
4062 enum addr_type_t type = UNICAST_ADDR;
Denis V. Lunevb8542722007-12-01 00:21:31 +11004063
Linus Torvalds1da177e2005-04-16 15:20:36 -07004064 return inet6_dump_addr(skb, cb, type);
4065}
4066
4067static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
4068{
4069 enum addr_type_t type = MULTICAST_ADDR;
Denis V. Lunevb8542722007-12-01 00:21:31 +11004070
Linus Torvalds1da177e2005-04-16 15:20:36 -07004071 return inet6_dump_addr(skb, cb, type);
4072}
4073
4074
4075static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
4076{
4077 enum addr_type_t type = ANYCAST_ADDR;
Denis V. Lunevb8542722007-12-01 00:21:31 +11004078
Linus Torvalds1da177e2005-04-16 15:20:36 -07004079 return inet6_dump_addr(skb, cb, type);
4080}
4081
Thomas Graf661d2962013-03-21 07:45:29 +00004082static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh)
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004083{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09004084 struct net *net = sock_net(in_skb->sk);
Thomas Graf1b29fc22006-09-18 00:10:50 -07004085 struct ifaddrmsg *ifm;
4086 struct nlattr *tb[IFA_MAX+1];
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004087 struct in6_addr *addr = NULL;
4088 struct net_device *dev = NULL;
4089 struct inet6_ifaddr *ifa;
4090 struct sk_buff *skb;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004091 int err;
4092
Thomas Graf1b29fc22006-09-18 00:10:50 -07004093 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
4094 if (err < 0)
4095 goto errout;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004096
Thomas Graf1b29fc22006-09-18 00:10:50 -07004097 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
4098 if (addr == NULL) {
4099 err = -EINVAL;
4100 goto errout;
4101 }
4102
4103 ifm = nlmsg_data(nlh);
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004104 if (ifm->ifa_index)
Benjamin Thery6fda7352008-03-05 10:47:47 -08004105 dev = __dev_get_by_index(net, ifm->ifa_index);
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004106
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004107 ifa = ipv6_get_ifaddr(net, addr, dev, 1);
4108 if (!ifa) {
Thomas Graf1b29fc22006-09-18 00:10:50 -07004109 err = -EADDRNOTAVAIL;
4110 goto errout;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004111 }
4112
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004113 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL);
4114 if (!skb) {
Thomas Graf1b29fc22006-09-18 00:10:50 -07004115 err = -ENOBUFS;
4116 goto errout_ifa;
4117 }
4118
Eric W. Biederman15e47302012-09-07 20:12:54 +00004119 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).portid,
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004120 nlh->nlmsg_seq, RTM_NEWADDR, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08004121 if (err < 0) {
4122 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4123 WARN_ON(err == -EMSGSIZE);
4124 kfree_skb(skb);
4125 goto errout_ifa;
4126 }
Eric W. Biederman15e47302012-09-07 20:12:54 +00004127 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
Thomas Graf1b29fc22006-09-18 00:10:50 -07004128errout_ifa:
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004129 in6_ifa_put(ifa);
Thomas Graf1b29fc22006-09-18 00:10:50 -07004130errout:
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004131 return err;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004132}
4133
Linus Torvalds1da177e2005-04-16 15:20:36 -07004134static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
4135{
4136 struct sk_buff *skb;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09004137 struct net *net = dev_net(ifa->idev->dev);
Thomas Graf5d620262006-08-15 00:35:02 -07004138 int err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004139
Thomas Graf0ab68032006-09-18 00:12:35 -07004140 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
Thomas Graf5d620262006-08-15 00:35:02 -07004141 if (skb == NULL)
4142 goto errout;
4143
4144 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08004145 if (err < 0) {
4146 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4147 WARN_ON(err == -EMSGSIZE);
4148 kfree_skb(skb);
4149 goto errout;
4150 }
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -08004151 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
4152 return;
Thomas Graf5d620262006-08-15 00:35:02 -07004153errout:
4154 if (err < 0)
Benjamin Thery6fda7352008-03-05 10:47:47 -08004155 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004156}
4157
Dave Jonesb6f99a22007-03-22 12:27:49 -07004158static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004159 __s32 *array, int bytes)
4160{
Thomas Graf04561c12006-11-14 19:53:58 -08004161 BUG_ON(bytes < (DEVCONF_MAX * 4));
4162
Linus Torvalds1da177e2005-04-16 15:20:36 -07004163 memset(array, 0, bytes);
4164 array[DEVCONF_FORWARDING] = cnf->forwarding;
4165 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
4166 array[DEVCONF_MTU6] = cnf->mtu6;
4167 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
4168 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
4169 array[DEVCONF_AUTOCONF] = cnf->autoconf;
4170 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
4171 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
Thomas Graf93908d12010-11-17 01:44:24 +00004172 array[DEVCONF_RTR_SOLICIT_INTERVAL] =
4173 jiffies_to_msecs(cnf->rtr_solicit_interval);
4174 array[DEVCONF_RTR_SOLICIT_DELAY] =
4175 jiffies_to_msecs(cnf->rtr_solicit_delay);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004176 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
4177#ifdef CONFIG_IPV6_PRIVACY
4178 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
4179 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
4180 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
4181 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
4182 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
4183#endif
4184 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -08004185 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -08004186 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08004187#ifdef CONFIG_IPV6_ROUTER_PREF
4188 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
Thomas Graf93908d12010-11-17 01:44:24 +00004189 array[DEVCONF_RTR_PROBE_INTERVAL] =
4190 jiffies_to_msecs(cnf->rtr_probe_interval);
Neil Hormanfa03ef32007-01-30 14:30:10 -08004191#ifdef CONFIG_IPV6_ROUTE_INFO
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -08004192 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
4193#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08004194#endif
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -07004195 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -07004196 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
Neil Horman95c385b2007-04-25 17:08:10 -07004197#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4198 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
4199#endif
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09004200#ifdef CONFIG_IPV6_MROUTE
4201 array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding;
4202#endif
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +09004203 array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6;
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09004204 array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad;
Cosmin Ratiuc3faca02009-10-09 03:11:14 +00004205 array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao;
Hannes Frederic Sowa5cb04432012-11-06 16:46:20 +00004206 array[DEVCONF_NDISC_NOTIFY] = cnf->ndisc_notify;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004207}
4208
Thomas Grafb382b192010-11-16 04:33:57 +00004209static inline size_t inet6_ifla6_size(void)
4210{
4211 return nla_total_size(4) /* IFLA_INET6_FLAGS */
4212 + nla_total_size(sizeof(struct ifla_cacheinfo))
4213 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
4214 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004215 + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
4216 + nla_total_size(sizeof(struct in6_addr)); /* IFLA_INET6_TOKEN */
Thomas Grafb382b192010-11-16 04:33:57 +00004217}
4218
Thomas Graf339bf982006-11-10 14:10:15 -08004219static inline size_t inet6_if_nlmsg_size(void)
4220{
4221 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
4222 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
4223 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
4224 + nla_total_size(4) /* IFLA_MTU */
4225 + nla_total_size(4) /* IFLA_LINK */
Thomas Grafb382b192010-11-16 04:33:57 +00004226 + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
Thomas Graf339bf982006-11-10 14:10:15 -08004227}
YOSHIFUJI Hideakic5396a32006-06-17 22:48:48 -07004228
Eric Dumazetbe281e52011-05-19 01:14:23 +00004229static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib,
Tejun Heo7d720c32010-02-16 15:20:26 +00004230 int items, int bytes)
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004231{
4232 int i;
4233 int pad = bytes - sizeof(u64) * items;
4234 BUG_ON(pad < 0);
4235
4236 /* Use put_unaligned() because stats may not be aligned for u64. */
4237 put_unaligned(items, &stats[0]);
4238 for (i = 1; i < items; i++)
Eric Dumazetbe281e52011-05-19 01:14:23 +00004239 put_unaligned(atomic_long_read(&mib[i]), &stats[i]);
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004240
4241 memset(&stats[items], 0, pad);
4242}
4243
Eric Dumazet4ce3c182010-06-30 13:31:19 -07004244static inline void __snmp6_fill_stats64(u64 *stats, void __percpu **mib,
4245 int items, int bytes, size_t syncpoff)
4246{
4247 int i;
4248 int pad = bytes - sizeof(u64) * items;
4249 BUG_ON(pad < 0);
4250
4251 /* Use put_unaligned() because stats may not be aligned for u64. */
4252 put_unaligned(items, &stats[0]);
4253 for (i = 1; i < items; i++)
4254 put_unaligned(snmp_fold_field64(mib, i, syncpoff), &stats[i]);
4255
4256 memset(&stats[items], 0, pad);
4257}
4258
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004259static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
4260 int bytes)
4261{
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004262 switch (attrtype) {
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004263 case IFLA_INET6_STATS:
Eric Dumazet4ce3c182010-06-30 13:31:19 -07004264 __snmp6_fill_stats64(stats, (void __percpu **)idev->stats.ipv6,
4265 IPSTATS_MIB_MAX, bytes, offsetof(struct ipstats_mib, syncp));
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004266 break;
4267 case IFLA_INET6_ICMP6STATS:
Eric Dumazetbe281e52011-05-19 01:14:23 +00004268 __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, ICMP6_MIB_MAX, bytes);
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004269 break;
4270 }
4271}
4272
Thomas Grafb382b192010-11-16 04:33:57 +00004273static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004274{
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07004275 struct nlattr *nla;
Thomas Graf04561c12006-11-14 19:53:58 -08004276 struct ifla_cacheinfo ci;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004277
David S. Millerc78679e2012-04-01 20:27:33 -04004278 if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags))
4279 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004280 ci.max_reasm_len = IPV6_MAXPLEN;
David S. Miller24912422010-11-19 13:13:47 -08004281 ci.tstamp = cstamp_delta(idev->tstamp);
4282 ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time);
4283 ci.retrans_time = jiffies_to_msecs(idev->nd_parms->retrans_time);
David S. Millerc78679e2012-04-01 20:27:33 -04004284 if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci))
4285 goto nla_put_failure;
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07004286 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
4287 if (nla == NULL)
Thomas Graf04561c12006-11-14 19:53:58 -08004288 goto nla_put_failure;
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07004289 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004290
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07004291 /* XXX - MC not implemented */
4292
4293 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
4294 if (nla == NULL)
4295 goto nla_put_failure;
4296 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
4297
4298 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
4299 if (nla == NULL)
4300 goto nla_put_failure;
4301 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004302
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004303 nla = nla_reserve(skb, IFLA_INET6_TOKEN, sizeof(struct in6_addr));
4304 if (nla == NULL)
4305 goto nla_put_failure;
4306 read_lock_bh(&idev->lock);
4307 memcpy(nla_data(nla), idev->token.s6_addr, nla_len(nla));
4308 read_unlock_bh(&idev->lock);
4309
Thomas Grafb382b192010-11-16 04:33:57 +00004310 return 0;
4311
4312nla_put_failure:
4313 return -EMSGSIZE;
4314}
4315
4316static size_t inet6_get_link_af_size(const struct net_device *dev)
4317{
4318 if (!__in6_dev_get(dev))
4319 return 0;
4320
4321 return inet6_ifla6_size();
4322}
4323
4324static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev)
4325{
4326 struct inet6_dev *idev = __in6_dev_get(dev);
4327
4328 if (!idev)
4329 return -ENODATA;
4330
4331 if (inet6_fill_ifla6_attrs(skb, idev) < 0)
4332 return -EMSGSIZE;
4333
4334 return 0;
4335}
4336
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004337static int inet6_set_iftoken(struct inet6_dev *idev, struct in6_addr *token)
4338{
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004339 struct inet6_ifaddr *ifp;
4340 struct net_device *dev = idev->dev;
Daniel Borkmannfc403832013-04-09 03:47:15 +00004341 bool update_rs = false;
Hannes Frederic Sowadc848292013-06-24 21:42:40 +02004342 struct in6_addr ll_addr;
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004343
4344 if (token == NULL)
4345 return -EINVAL;
4346 if (ipv6_addr_any(token))
4347 return -EINVAL;
4348 if (dev->flags & (IFF_LOOPBACK | IFF_NOARP))
4349 return -EINVAL;
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004350 if (!ipv6_accept_ra(idev))
4351 return -EINVAL;
4352 if (idev->cnf.rtr_solicits <= 0)
4353 return -EINVAL;
4354
4355 write_lock_bh(&idev->lock);
4356
4357 BUILD_BUG_ON(sizeof(token->s6_addr) != 16);
4358 memcpy(idev->token.s6_addr + 8, token->s6_addr + 8, 8);
4359
4360 write_unlock_bh(&idev->lock);
4361
Hannes Frederic Sowadc848292013-06-24 21:42:40 +02004362 if (!idev->dead && (idev->if_flags & IF_READY) &&
4363 !ipv6_get_lladdr(dev, &ll_addr, IFA_F_TENTATIVE |
4364 IFA_F_OPTIMISTIC)) {
Daniel Borkmannfc403832013-04-09 03:47:15 +00004365
4366 /* If we're not ready, then normal ifup will take care
4367 * of this. Otherwise, we need to request our rs here.
4368 */
4369 ndisc_send_rs(dev, &ll_addr, &in6addr_linklocal_allrouters);
4370 update_rs = true;
4371 }
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004372
4373 write_lock_bh(&idev->lock);
Daniel Borkmannfc403832013-04-09 03:47:15 +00004374
4375 if (update_rs)
4376 idev->if_flags |= IF_RS_SENT;
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004377
4378 /* Well, that's kinda nasty ... */
4379 list_for_each_entry(ifp, &idev->addr_list, if_list) {
4380 spin_lock(&ifp->lock);
Daniel Borkmann617fe292013-04-09 03:47:16 +00004381 if (ifp->tokenized) {
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004382 ifp->valid_lft = 0;
4383 ifp->prefered_lft = 0;
4384 }
4385 spin_unlock(&ifp->lock);
4386 }
4387
4388 write_unlock_bh(&idev->lock);
4389 return 0;
4390}
4391
4392static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla)
4393{
4394 int err = -EINVAL;
4395 struct inet6_dev *idev = __in6_dev_get(dev);
4396 struct nlattr *tb[IFLA_INET6_MAX + 1];
4397
4398 if (!idev)
4399 return -EAFNOSUPPORT;
4400
4401 if (nla_parse_nested(tb, IFLA_INET6_MAX, nla, NULL) < 0)
4402 BUG();
4403
4404 if (tb[IFLA_INET6_TOKEN])
4405 err = inet6_set_iftoken(idev, nla_data(tb[IFLA_INET6_TOKEN]));
4406
4407 return err;
4408}
4409
Thomas Grafb382b192010-11-16 04:33:57 +00004410static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004411 u32 portid, u32 seq, int event, unsigned int flags)
Thomas Grafb382b192010-11-16 04:33:57 +00004412{
4413 struct net_device *dev = idev->dev;
4414 struct ifinfomsg *hdr;
4415 struct nlmsghdr *nlh;
4416 void *protoinfo;
4417
Eric W. Biederman15e47302012-09-07 20:12:54 +00004418 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*hdr), flags);
Thomas Grafb382b192010-11-16 04:33:57 +00004419 if (nlh == NULL)
4420 return -EMSGSIZE;
4421
4422 hdr = nlmsg_data(nlh);
4423 hdr->ifi_family = AF_INET6;
4424 hdr->__ifi_pad = 0;
4425 hdr->ifi_type = dev->type;
4426 hdr->ifi_index = dev->ifindex;
4427 hdr->ifi_flags = dev_get_flags(dev);
4428 hdr->ifi_change = 0;
4429
David S. Millerc78679e2012-04-01 20:27:33 -04004430 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
4431 (dev->addr_len &&
4432 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
4433 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
4434 (dev->ifindex != dev->iflink &&
4435 nla_put_u32(skb, IFLA_LINK, dev->iflink)))
4436 goto nla_put_failure;
Thomas Grafb382b192010-11-16 04:33:57 +00004437 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
4438 if (protoinfo == NULL)
4439 goto nla_put_failure;
4440
4441 if (inet6_fill_ifla6_attrs(skb, idev) < 0)
4442 goto nla_put_failure;
4443
Thomas Graf04561c12006-11-14 19:53:58 -08004444 nla_nest_end(skb, protoinfo);
4445 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004446
Thomas Graf04561c12006-11-14 19:53:58 -08004447nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -08004448 nlmsg_cancel(skb, nlh);
4449 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004450}
4451
4452static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
4453{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09004454 struct net *net = sock_net(skb->sk);
Eric Dumazet84d26972009-11-09 12:11:28 +00004455 int h, s_h;
David S. Miller434a8a52009-11-11 18:53:00 -08004456 int idx = 0, s_idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004457 struct net_device *dev;
4458 struct inet6_dev *idev;
Eric Dumazet84d26972009-11-09 12:11:28 +00004459 struct hlist_head *head;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004460
Eric Dumazet84d26972009-11-09 12:11:28 +00004461 s_h = cb->args[0];
4462 s_idx = cb->args[1];
4463
4464 rcu_read_lock();
4465 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4466 idx = 0;
4467 head = &net->dev_index_head[h];
Sasha Levinb67bfe02013-02-27 17:06:00 -08004468 hlist_for_each_entry_rcu(dev, head, index_hlist) {
Eric Dumazet84d26972009-11-09 12:11:28 +00004469 if (idx < s_idx)
4470 goto cont;
4471 idev = __in6_dev_get(dev);
4472 if (!idev)
4473 goto cont;
4474 if (inet6_fill_ifinfo(skb, idev,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004475 NETLINK_CB(cb->skb).portid,
Eric Dumazet84d26972009-11-09 12:11:28 +00004476 cb->nlh->nlmsg_seq,
4477 RTM_NEWLINK, NLM_F_MULTI) <= 0)
4478 goto out;
Pavel Emelianov7562f872007-05-03 15:13:45 -07004479cont:
Eric Dumazet84d26972009-11-09 12:11:28 +00004480 idx++;
4481 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004482 }
Eric Dumazet84d26972009-11-09 12:11:28 +00004483out:
4484 rcu_read_unlock();
4485 cb->args[1] = idx;
4486 cb->args[0] = h;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004487
4488 return skb->len;
4489}
4490
4491void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
4492{
4493 struct sk_buff *skb;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09004494 struct net *net = dev_net(idev->dev);
Thomas Graf8d7a76c2006-08-15 00:35:47 -07004495 int err = -ENOBUFS;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004496
Thomas Graf339bf982006-11-10 14:10:15 -08004497 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
Thomas Graf8d7a76c2006-08-15 00:35:47 -07004498 if (skb == NULL)
4499 goto errout;
4500
4501 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08004502 if (err < 0) {
4503 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
4504 WARN_ON(err == -EMSGSIZE);
4505 kfree_skb(skb);
4506 goto errout;
4507 }
Nicolas Dichtel5f75a102010-12-07 23:38:31 +00004508 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC);
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -08004509 return;
Thomas Graf8d7a76c2006-08-15 00:35:47 -07004510errout:
4511 if (err < 0)
Nicolas Dichtel5f75a102010-12-07 23:38:31 +00004512 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004513}
4514
Thomas Graf339bf982006-11-10 14:10:15 -08004515static inline size_t inet6_prefix_nlmsg_size(void)
4516{
4517 return NLMSG_ALIGN(sizeof(struct prefixmsg))
4518 + nla_total_size(sizeof(struct in6_addr))
4519 + nla_total_size(sizeof(struct prefix_cacheinfo));
4520}
YOSHIFUJI Hideakic5396a32006-06-17 22:48:48 -07004521
Linus Torvalds1da177e2005-04-16 15:20:36 -07004522static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004523 struct prefix_info *pinfo, u32 portid, u32 seq,
Thomas Graf6051e2f2006-11-14 19:54:19 -08004524 int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004525{
Thomas Graf6051e2f2006-11-14 19:54:19 -08004526 struct prefixmsg *pmsg;
4527 struct nlmsghdr *nlh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004528 struct prefix_cacheinfo ci;
4529
Eric W. Biederman15e47302012-09-07 20:12:54 +00004530 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*pmsg), flags);
Thomas Graf6051e2f2006-11-14 19:54:19 -08004531 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -08004532 return -EMSGSIZE;
Thomas Graf6051e2f2006-11-14 19:54:19 -08004533
4534 pmsg = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004535 pmsg->prefix_family = AF_INET6;
Patrick McHardy8a470772005-06-28 12:56:45 -07004536 pmsg->prefix_pad1 = 0;
4537 pmsg->prefix_pad2 = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004538 pmsg->prefix_ifindex = idev->dev->ifindex;
4539 pmsg->prefix_len = pinfo->prefix_len;
4540 pmsg->prefix_type = pinfo->type;
Patrick McHardy8a470772005-06-28 12:56:45 -07004541 pmsg->prefix_pad3 = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004542 pmsg->prefix_flags = 0;
4543 if (pinfo->onlink)
4544 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
4545 if (pinfo->autoconf)
4546 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
4547
David S. Millerc78679e2012-04-01 20:27:33 -04004548 if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix))
4549 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004550 ci.preferred_time = ntohl(pinfo->prefered);
4551 ci.valid_time = ntohl(pinfo->valid);
David S. Millerc78679e2012-04-01 20:27:33 -04004552 if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci))
4553 goto nla_put_failure;
Thomas Graf6051e2f2006-11-14 19:54:19 -08004554 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004555
Thomas Graf6051e2f2006-11-14 19:54:19 -08004556nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -08004557 nlmsg_cancel(skb, nlh);
4558 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004559}
4560
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004561static void inet6_prefix_notify(int event, struct inet6_dev *idev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004562 struct prefix_info *pinfo)
4563{
4564 struct sk_buff *skb;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09004565 struct net *net = dev_net(idev->dev);
Thomas Graf8c384bfa2006-08-15 00:36:07 -07004566 int err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004567
Thomas Graf339bf982006-11-10 14:10:15 -08004568 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
Thomas Graf8c384bfa2006-08-15 00:36:07 -07004569 if (skb == NULL)
4570 goto errout;
4571
4572 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08004573 if (err < 0) {
4574 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
4575 WARN_ON(err == -EMSGSIZE);
4576 kfree_skb(skb);
4577 goto errout;
4578 }
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -08004579 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
4580 return;
Thomas Graf8c384bfa2006-08-15 00:36:07 -07004581errout:
4582 if (err < 0)
Benjamin Thery6fda7352008-03-05 10:47:47 -08004583 rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004584}
4585
Linus Torvalds1da177e2005-04-16 15:20:36 -07004586static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
4587{
Nicolas Dichtel63998ac2013-03-22 06:28:43 +00004588 struct net *net = dev_net(ifp->idev->dev);
4589
Linus Torvalds1da177e2005-04-16 15:20:36 -07004590 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
4591
4592 switch (event) {
4593 case RTM_NEWADDR:
Neil Horman95c385b2007-04-25 17:08:10 -07004594 /*
4595 * If the address was optimistic
4596 * we inserted the route at the start of
4597 * our DAD process, so we don't need
4598 * to do it again
4599 */
4600 if (!(ifp->rt->rt6i_node))
4601 ip6_ins_rt(ifp->rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004602 if (ifp->idev->cnf.forwarding)
4603 addrconf_join_anycast(ifp);
4604 break;
4605 case RTM_DELADDR:
4606 if (ifp->idev->cnf.forwarding)
4607 addrconf_leave_anycast(ifp);
4608 addrconf_leave_solict(ifp->idev, &ifp->addr);
Changli Gaod8d1f302010-06-10 23:31:35 -07004609 dst_hold(&ifp->rt->dst);
stephen hemminger93fa1592010-04-12 05:41:31 +00004610
David S. Miller73a8bd72011-01-23 23:27:15 -08004611 if (ip6_del_rt(ifp->rt))
Changli Gaod8d1f302010-06-10 23:31:35 -07004612 dst_free(&ifp->rt->dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004613 break;
4614 }
Nicolas Dichtel63998ac2013-03-22 06:28:43 +00004615 atomic_inc(&net->ipv6.dev_addr_genid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004616}
4617
4618static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
4619{
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07004620 rcu_read_lock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004621 if (likely(ifp->idev->dead == 0))
4622 __ipv6_ifa_notify(event, ifp);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07004623 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004624}
4625
4626#ifdef CONFIG_SYSCTL
4627
4628static
Alexey Dobriyan8d65af72009-09-23 15:57:19 -07004629int addrconf_sysctl_forward(ctl_table *ctl, int write,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004630 void __user *buffer, size_t *lenp, loff_t *ppos)
4631{
4632 int *valp = ctl->data;
4633 int val = *valp;
Eric W. Biederman88af1822010-02-19 13:22:59 +00004634 loff_t pos = *ppos;
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00004635 ctl_table lctl;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004636 int ret;
4637
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00004638 /*
4639 * ctl->data points to idev->cnf.forwarding, we should
4640 * not modify it until we get the rtnl lock.
4641 */
4642 lctl = *ctl;
4643 lctl.data = &val;
4644
4645 ret = proc_dointvec(&lctl, write, buffer, lenp, ppos);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004646
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -08004647 if (write)
Stephen Hemmingerb325fdd2009-02-26 06:55:31 +00004648 ret = addrconf_fixup_forwarding(ctl, valp, val);
Eric W. Biederman88af1822010-02-19 13:22:59 +00004649 if (ret)
4650 *ppos = pos;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004651 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004652}
4653
Brian Haley56d417b2009-06-01 03:07:33 -07004654static void dev_disable_change(struct inet6_dev *idev)
4655{
4656 if (!idev || !idev->dev)
4657 return;
4658
4659 if (idev->cnf.disable_ipv6)
4660 addrconf_notify(NULL, NETDEV_DOWN, idev->dev);
4661 else
4662 addrconf_notify(NULL, NETDEV_UP, idev->dev);
4663}
4664
4665static void addrconf_disable_change(struct net *net, __s32 newf)
4666{
4667 struct net_device *dev;
4668 struct inet6_dev *idev;
4669
Eric Dumazetc6d14c82009-11-04 05:43:23 -08004670 rcu_read_lock();
4671 for_each_netdev_rcu(net, dev) {
Brian Haley56d417b2009-06-01 03:07:33 -07004672 idev = __in6_dev_get(dev);
4673 if (idev) {
4674 int changed = (!idev->cnf.disable_ipv6) ^ (!newf);
4675 idev->cnf.disable_ipv6 = newf;
4676 if (changed)
4677 dev_disable_change(idev);
4678 }
Brian Haley56d417b2009-06-01 03:07:33 -07004679 }
Eric Dumazetc6d14c82009-11-04 05:43:23 -08004680 rcu_read_unlock();
Brian Haley56d417b2009-06-01 03:07:33 -07004681}
4682
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00004683static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf)
Brian Haley56d417b2009-06-01 03:07:33 -07004684{
4685 struct net *net;
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00004686 int old;
4687
4688 if (!rtnl_trylock())
4689 return restart_syscall();
Brian Haley56d417b2009-06-01 03:07:33 -07004690
4691 net = (struct net *)table->extra2;
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00004692 old = *p;
4693 *p = newf;
Brian Haley56d417b2009-06-01 03:07:33 -07004694
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00004695 if (p == &net->ipv6.devconf_dflt->disable_ipv6) {
4696 rtnl_unlock();
Brian Haley56d417b2009-06-01 03:07:33 -07004697 return 0;
Eric W. Biederman88af1822010-02-19 13:22:59 +00004698 }
Brian Haley56d417b2009-06-01 03:07:33 -07004699
4700 if (p == &net->ipv6.devconf_all->disable_ipv6) {
Brian Haley56d417b2009-06-01 03:07:33 -07004701 net->ipv6.devconf_dflt->disable_ipv6 = newf;
4702 addrconf_disable_change(net, newf);
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00004703 } else if ((!newf) ^ (!old))
Brian Haley56d417b2009-06-01 03:07:33 -07004704 dev_disable_change((struct inet6_dev *)table->extra1);
4705
4706 rtnl_unlock();
4707 return 0;
4708}
4709
4710static
Alexey Dobriyan8d65af72009-09-23 15:57:19 -07004711int addrconf_sysctl_disable(ctl_table *ctl, int write,
Brian Haley56d417b2009-06-01 03:07:33 -07004712 void __user *buffer, size_t *lenp, loff_t *ppos)
4713{
4714 int *valp = ctl->data;
4715 int val = *valp;
Eric W. Biederman88af1822010-02-19 13:22:59 +00004716 loff_t pos = *ppos;
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00004717 ctl_table lctl;
Brian Haley56d417b2009-06-01 03:07:33 -07004718 int ret;
4719
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00004720 /*
4721 * ctl->data points to idev->cnf.disable_ipv6, we should
4722 * not modify it until we get the rtnl lock.
4723 */
4724 lctl = *ctl;
4725 lctl.data = &val;
4726
4727 ret = proc_dointvec(&lctl, write, buffer, lenp, ppos);
Brian Haley56d417b2009-06-01 03:07:33 -07004728
4729 if (write)
4730 ret = addrconf_disable_ipv6(ctl, valp, val);
Eric W. Biederman88af1822010-02-19 13:22:59 +00004731 if (ret)
4732 *ppos = pos;
Brian Haley56d417b2009-06-01 03:07:33 -07004733 return ret;
4734}
4735
Linus Torvalds1da177e2005-04-16 15:20:36 -07004736static struct addrconf_sysctl_table
4737{
4738 struct ctl_table_header *sysctl_header;
YOSHIFUJI Hideakif6a07b22008-03-25 00:25:11 +09004739 ctl_table addrconf_vars[DEVCONF_MAX+1];
Brian Haleyab32ea52006-09-22 14:15:41 -07004740} addrconf_sysctl __read_mostly = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004741 .sysctl_header = NULL,
4742 .addrconf_vars = {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004743 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004744 .procname = "forwarding",
4745 .data = &ipv6_devconf.forwarding,
4746 .maxlen = sizeof(int),
4747 .mode = 0644,
4748 .proc_handler = addrconf_sysctl_forward,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004749 },
4750 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004751 .procname = "hop_limit",
4752 .data = &ipv6_devconf.hop_limit,
4753 .maxlen = sizeof(int),
4754 .mode = 0644,
4755 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004756 },
4757 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004758 .procname = "mtu",
4759 .data = &ipv6_devconf.mtu6,
4760 .maxlen = sizeof(int),
4761 .mode = 0644,
4762 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004763 },
4764 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004765 .procname = "accept_ra",
4766 .data = &ipv6_devconf.accept_ra,
4767 .maxlen = sizeof(int),
4768 .mode = 0644,
4769 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004770 },
4771 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004772 .procname = "accept_redirects",
4773 .data = &ipv6_devconf.accept_redirects,
4774 .maxlen = sizeof(int),
4775 .mode = 0644,
4776 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004777 },
4778 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004779 .procname = "autoconf",
4780 .data = &ipv6_devconf.autoconf,
4781 .maxlen = sizeof(int),
4782 .mode = 0644,
4783 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004784 },
4785 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004786 .procname = "dad_transmits",
4787 .data = &ipv6_devconf.dad_transmits,
4788 .maxlen = sizeof(int),
4789 .mode = 0644,
4790 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004791 },
4792 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004793 .procname = "router_solicitations",
4794 .data = &ipv6_devconf.rtr_solicits,
4795 .maxlen = sizeof(int),
4796 .mode = 0644,
4797 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004798 },
4799 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004800 .procname = "router_solicitation_interval",
4801 .data = &ipv6_devconf.rtr_solicit_interval,
4802 .maxlen = sizeof(int),
4803 .mode = 0644,
4804 .proc_handler = proc_dointvec_jiffies,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004805 },
4806 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004807 .procname = "router_solicitation_delay",
4808 .data = &ipv6_devconf.rtr_solicit_delay,
4809 .maxlen = sizeof(int),
4810 .mode = 0644,
4811 .proc_handler = proc_dointvec_jiffies,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004812 },
4813 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004814 .procname = "force_mld_version",
4815 .data = &ipv6_devconf.force_mld_version,
4816 .maxlen = sizeof(int),
4817 .mode = 0644,
4818 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004819 },
4820#ifdef CONFIG_IPV6_PRIVACY
4821 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004822 .procname = "use_tempaddr",
4823 .data = &ipv6_devconf.use_tempaddr,
4824 .maxlen = sizeof(int),
4825 .mode = 0644,
4826 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004827 },
4828 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004829 .procname = "temp_valid_lft",
4830 .data = &ipv6_devconf.temp_valid_lft,
4831 .maxlen = sizeof(int),
4832 .mode = 0644,
4833 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004834 },
4835 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004836 .procname = "temp_prefered_lft",
4837 .data = &ipv6_devconf.temp_prefered_lft,
4838 .maxlen = sizeof(int),
4839 .mode = 0644,
4840 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004841 },
4842 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004843 .procname = "regen_max_retry",
4844 .data = &ipv6_devconf.regen_max_retry,
4845 .maxlen = sizeof(int),
4846 .mode = 0644,
4847 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004848 },
4849 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004850 .procname = "max_desync_factor",
4851 .data = &ipv6_devconf.max_desync_factor,
4852 .maxlen = sizeof(int),
4853 .mode = 0644,
4854 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004855 },
4856#endif
4857 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004858 .procname = "max_addresses",
4859 .data = &ipv6_devconf.max_addresses,
4860 .maxlen = sizeof(int),
4861 .mode = 0644,
4862 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004863 },
4864 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004865 .procname = "accept_ra_defrtr",
4866 .data = &ipv6_devconf.accept_ra_defrtr,
4867 .maxlen = sizeof(int),
4868 .mode = 0644,
4869 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -08004870 },
4871 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004872 .procname = "accept_ra_pinfo",
4873 .data = &ipv6_devconf.accept_ra_pinfo,
4874 .maxlen = sizeof(int),
4875 .mode = 0644,
4876 .proc_handler = proc_dointvec,
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -08004877 },
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08004878#ifdef CONFIG_IPV6_ROUTER_PREF
4879 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004880 .procname = "accept_ra_rtr_pref",
4881 .data = &ipv6_devconf.accept_ra_rtr_pref,
4882 .maxlen = sizeof(int),
4883 .mode = 0644,
4884 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08004885 },
YOSHIFUJI Hideaki52e163562006-03-20 17:05:47 -08004886 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004887 .procname = "router_probe_interval",
4888 .data = &ipv6_devconf.rtr_probe_interval,
4889 .maxlen = sizeof(int),
4890 .mode = 0644,
4891 .proc_handler = proc_dointvec_jiffies,
YOSHIFUJI Hideaki52e163562006-03-20 17:05:47 -08004892 },
Neil Hormanfa03ef32007-01-30 14:30:10 -08004893#ifdef CONFIG_IPV6_ROUTE_INFO
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -08004894 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004895 .procname = "accept_ra_rt_info_max_plen",
4896 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
4897 .maxlen = sizeof(int),
4898 .mode = 0644,
4899 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -08004900 },
4901#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08004902#endif
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -08004903 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004904 .procname = "proxy_ndp",
4905 .data = &ipv6_devconf.proxy_ndp,
4906 .maxlen = sizeof(int),
4907 .mode = 0644,
4908 .proc_handler = proc_dointvec,
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -07004909 },
4910 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004911 .procname = "accept_source_route",
4912 .data = &ipv6_devconf.accept_source_route,
4913 .maxlen = sizeof(int),
4914 .mode = 0644,
4915 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -07004916 },
Neil Horman95c385b2007-04-25 17:08:10 -07004917#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4918 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004919 .procname = "optimistic_dad",
4920 .data = &ipv6_devconf.optimistic_dad,
4921 .maxlen = sizeof(int),
4922 .mode = 0644,
4923 .proc_handler = proc_dointvec,
Neil Horman95c385b2007-04-25 17:08:10 -07004924
4925 },
4926#endif
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09004927#ifdef CONFIG_IPV6_MROUTE
4928 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004929 .procname = "mc_forwarding",
4930 .data = &ipv6_devconf.mc_forwarding,
4931 .maxlen = sizeof(int),
4932 .mode = 0444,
4933 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09004934 },
4935#endif
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -07004936 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004937 .procname = "disable_ipv6",
4938 .data = &ipv6_devconf.disable_ipv6,
4939 .maxlen = sizeof(int),
4940 .mode = 0644,
4941 .proc_handler = addrconf_sysctl_disable,
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +09004942 },
4943 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004944 .procname = "accept_dad",
4945 .data = &ipv6_devconf.accept_dad,
4946 .maxlen = sizeof(int),
4947 .mode = 0644,
4948 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09004949 },
4950 {
Octavian Purdilaf7734fd2009-10-02 11:39:15 +00004951 .procname = "force_tllao",
4952 .data = &ipv6_devconf.force_tllao,
4953 .maxlen = sizeof(int),
4954 .mode = 0644,
4955 .proc_handler = proc_dointvec
4956 },
4957 {
Hannes Frederic Sowa5cb04432012-11-06 16:46:20 +00004958 .procname = "ndisc_notify",
4959 .data = &ipv6_devconf.ndisc_notify,
4960 .maxlen = sizeof(int),
4961 .mode = 0644,
4962 .proc_handler = proc_dointvec
4963 },
4964 {
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08004965 /* sentinel */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004966 }
4967 },
Linus Torvalds1da177e2005-04-16 15:20:36 -07004968};
4969
Pavel Emelyanovbff16c22008-01-10 17:42:13 -08004970static int __addrconf_sysctl_register(struct net *net, char *dev_name,
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08004971 struct inet6_dev *idev, struct ipv6_devconf *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004972{
4973 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004974 struct addrconf_sysctl_table *t;
Eric W. Biederman6105e292012-04-19 13:41:24 +00004975 char path[sizeof("net/ipv6/conf/") + IFNAMSIZ];
Pavel Emelyanov1dab6222007-12-02 00:59:38 +11004976
Arnaldo Carvalho de Meloaf879cc2006-11-17 12:14:37 -02004977 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004978 if (t == NULL)
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11004979 goto out;
4980
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07004981 for (i = 0; t->addrconf_vars[i].data; i++) {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004982 t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004983 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
Pavel Emelyanovbff16c22008-01-10 17:42:13 -08004984 t->addrconf_vars[i].extra2 = net;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004985 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004986
Eric W. Biederman6105e292012-04-19 13:41:24 +00004987 snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004988
Eric W. Biederman6105e292012-04-19 13:41:24 +00004989 t->sysctl_header = register_net_sysctl(net, path, t->addrconf_vars);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004990 if (t->sysctl_header == NULL)
Eric W. Biederman6105e292012-04-19 13:41:24 +00004991 goto free;
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11004992
4993 p->sysctl = t;
Pavel Emelyanov95897312008-01-10 17:41:45 -08004994 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004995
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11004996free:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004997 kfree(t);
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11004998out:
Pavel Emelyanov95897312008-01-10 17:41:45 -08004999 return -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005000}
5001
Pavel Emelyanov408c4762008-01-10 17:41:21 -08005002static void __addrconf_sysctl_unregister(struct ipv6_devconf *p)
5003{
5004 struct addrconf_sysctl_table *t;
5005
5006 if (p->sysctl == NULL)
5007 return;
5008
5009 t = p->sysctl;
5010 p->sysctl = NULL;
Lucian Adrian Grijincuff538812011-05-01 01:44:01 +00005011 unregister_net_sysctl_table(t->sysctl_header);
Pavel Emelyanov408c4762008-01-10 17:41:21 -08005012 kfree(t);
5013}
5014
Pavel Emelyanovf52295a2007-12-02 00:58:37 +11005015static void addrconf_sysctl_register(struct inet6_dev *idev)
5016{
Eric W. Biederman54716e32010-02-14 03:27:03 +00005017 neigh_sysctl_register(idev->dev, idev->nd_parms, "ipv6",
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08005018 &ndisc_ifinfo_sysctl_change);
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09005019 __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name,
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08005020 idev, &idev->cnf);
Pavel Emelyanovf52295a2007-12-02 00:58:37 +11005021}
5022
Pavel Emelyanov408c4762008-01-10 17:41:21 -08005023static void addrconf_sysctl_unregister(struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005024{
Pavel Emelyanov408c4762008-01-10 17:41:21 -08005025 __addrconf_sysctl_unregister(&idev->cnf);
5026 neigh_sysctl_unregister(idev->nd_parms);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005027}
5028
5029
5030#endif
5031
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00005032static int __net_init addrconf_init_net(struct net *net)
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005033{
Hong Zhiguoa79ca222013-03-26 01:52:45 +08005034 int err = -ENOMEM;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005035 struct ipv6_devconf *all, *dflt;
5036
Hong Zhiguoa79ca222013-03-26 01:52:45 +08005037 all = kmemdup(&ipv6_devconf, sizeof(ipv6_devconf), GFP_KERNEL);
5038 if (all == NULL)
5039 goto err_alloc_all;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005040
Hong Zhiguoa79ca222013-03-26 01:52:45 +08005041 dflt = kmemdup(&ipv6_devconf_dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL);
5042 if (dflt == NULL)
5043 goto err_alloc_dflt;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005044
Hong Zhiguoa79ca222013-03-26 01:52:45 +08005045 /* these will be inherited by all namespaces */
5046 dflt->autoconf = ipv6_defaults.autoconf;
5047 dflt->disable_ipv6 = ipv6_defaults.disable_ipv6;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005048
5049 net->ipv6.devconf_all = all;
5050 net->ipv6.devconf_dflt = dflt;
5051
5052#ifdef CONFIG_SYSCTL
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08005053 err = __addrconf_sysctl_register(net, "all", NULL, all);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005054 if (err < 0)
5055 goto err_reg_all;
5056
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08005057 err = __addrconf_sysctl_register(net, "default", NULL, dflt);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005058 if (err < 0)
5059 goto err_reg_dflt;
5060#endif
5061 return 0;
5062
5063#ifdef CONFIG_SYSCTL
5064err_reg_dflt:
5065 __addrconf_sysctl_unregister(all);
5066err_reg_all:
5067 kfree(dflt);
5068#endif
5069err_alloc_dflt:
5070 kfree(all);
5071err_alloc_all:
5072 return err;
5073}
5074
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00005075static void __net_exit addrconf_exit_net(struct net *net)
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005076{
5077#ifdef CONFIG_SYSCTL
5078 __addrconf_sysctl_unregister(net->ipv6.devconf_dflt);
5079 __addrconf_sysctl_unregister(net->ipv6.devconf_all);
5080#endif
Octavian Purdila09ad9bc2009-11-25 15:14:13 -08005081 if (!net_eq(net, &init_net)) {
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005082 kfree(net->ipv6.devconf_dflt);
5083 kfree(net->ipv6.devconf_all);
5084 }
5085}
5086
5087static struct pernet_operations addrconf_ops = {
5088 .init = addrconf_init_net,
5089 .exit = addrconf_exit_net,
5090};
5091
Thomas Grafb382b192010-11-16 04:33:57 +00005092static struct rtnl_af_ops inet6_ops = {
5093 .family = AF_INET6,
5094 .fill_link_af = inet6_fill_link_af,
5095 .get_link_af_size = inet6_get_link_af_size,
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005096 .set_link_af = inet6_set_link_af,
Thomas Grafb382b192010-11-16 04:33:57 +00005097};
5098
Linus Torvalds1da177e2005-04-16 15:20:36 -07005099/*
5100 * Init / cleanup code
5101 */
5102
5103int __init addrconf_init(void)
5104{
stephen hemmingerc2e21292010-03-17 20:31:10 +00005105 int i, err;
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +09005106
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005107 err = ipv6_addr_label_init();
5108 if (err < 0) {
Joe Perchesf3213832012-05-15 14:11:53 +00005109 pr_crit("%s: cannot initialize default policy table: %d\n",
5110 __func__, err);
Neil Horman2cc6d2b2010-09-24 09:55:52 +00005111 goto out;
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +09005112 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005113
Neil Horman2cc6d2b2010-09-24 09:55:52 +00005114 err = register_pernet_subsys(&addrconf_ops);
5115 if (err < 0)
5116 goto out_addrlabel;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005117
Linus Torvalds1da177e2005-04-16 15:20:36 -07005118 /* The addrconf netdev notifier requires that loopback_dev
5119 * has it's ipv6 private information allocated and setup
5120 * before it can bring up and give link-local addresses
5121 * to other devices which are up.
5122 *
5123 * Unfortunately, loopback_dev is not necessarily the first
5124 * entry in the global dev_base list of net devices. In fact,
5125 * it is likely to be the very last entry on that list.
5126 * So this causes the notifier registry below to try and
5127 * give link-local addresses to all devices besides loopback_dev
5128 * first, then loopback_dev, which cases all the non-loopback_dev
5129 * devices to fail to get a link-local address.
5130 *
5131 * So, as a temporary fix, allocate the ipv6 structure for
5132 * loopback_dev first by hand.
5133 * Longer term, all of the dependencies ipv6 has upon the loopback
5134 * device and it being up should be removed.
5135 */
5136 rtnl_lock();
Eric W. Biederman2774c7a2007-09-26 22:10:56 -07005137 if (!ipv6_add_dev(init_net.loopback_dev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07005138 err = -ENOMEM;
5139 rtnl_unlock();
5140 if (err)
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005141 goto errlo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005142
stephen hemmingerc2e21292010-03-17 20:31:10 +00005143 for (i = 0; i < IN6_ADDR_HSIZE; i++)
5144 INIT_HLIST_HEAD(&inet6_addr_lst[i]);
5145
Linus Torvalds1da177e2005-04-16 15:20:36 -07005146 register_netdevice_notifier(&ipv6_dev_notf);
5147
Linus Torvalds1da177e2005-04-16 15:20:36 -07005148 addrconf_verify(0);
Thomas Grafc127ea22007-03-22 11:58:32 -07005149
Thomas Grafb382b192010-11-16 04:33:57 +00005150 err = rtnl_af_register(&inet6_ops);
5151 if (err < 0)
5152 goto errout_af;
5153
Greg Rosec7ac8672011-06-10 01:27:09 +00005154 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo,
5155 NULL);
Thomas Grafc127ea22007-03-22 11:58:32 -07005156 if (err < 0)
5157 goto errout;
5158
5159 /* Only the first call to __rtnl_register can fail */
Greg Rosec7ac8672011-06-10 01:27:09 +00005160 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL);
5161 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL);
5162 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr,
5163 inet6_dump_ifaddr, NULL);
5164 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL,
5165 inet6_dump_ifmcaddr, NULL);
5166 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL,
5167 inet6_dump_ifacaddr, NULL);
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +00005168 __rtnl_register(PF_INET6, RTM_GETNETCONF, inet6_netconf_get_devconf,
Nicolas Dichtel7a674202013-03-05 23:42:06 +00005169 inet6_netconf_dump_devconf, NULL);
Thomas Grafc127ea22007-03-22 11:58:32 -07005170
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +09005171 ipv6_addr_label_rtnl_register();
5172
Linus Torvalds1da177e2005-04-16 15:20:36 -07005173 return 0;
Thomas Grafc127ea22007-03-22 11:58:32 -07005174errout:
Thomas Grafb382b192010-11-16 04:33:57 +00005175 rtnl_af_unregister(&inet6_ops);
5176errout_af:
Thomas Grafc127ea22007-03-22 11:58:32 -07005177 unregister_netdevice_notifier(&ipv6_dev_notf);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005178errlo:
5179 unregister_pernet_subsys(&addrconf_ops);
Neil Horman2cc6d2b2010-09-24 09:55:52 +00005180out_addrlabel:
5181 ipv6_addr_label_cleanup();
5182out:
Thomas Grafc127ea22007-03-22 11:58:32 -07005183 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005184}
5185
Daniel Lezcano09f77092007-12-13 05:34:58 -08005186void addrconf_cleanup(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005187{
Daniel Lezcano176c39a2009-03-03 01:06:45 -08005188 struct net_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005189 int i;
5190
5191 unregister_netdevice_notifier(&ipv6_dev_notf);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005192 unregister_pernet_subsys(&addrconf_ops);
Neil Horman2cc6d2b2010-09-24 09:55:52 +00005193 ipv6_addr_label_cleanup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07005194
5195 rtnl_lock();
5196
Thomas Grafb382b192010-11-16 04:33:57 +00005197 __rtnl_af_unregister(&inet6_ops);
5198
Daniel Lezcano176c39a2009-03-03 01:06:45 -08005199 /* clean dev list */
5200 for_each_netdev(&init_net, dev) {
5201 if (__in6_dev_get(dev) == NULL)
5202 continue;
5203 addrconf_ifdown(dev, 1);
5204 }
5205 addrconf_ifdown(init_net.loopback_dev, 2);
5206
Linus Torvalds1da177e2005-04-16 15:20:36 -07005207 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07005208 * Check hash table.
5209 */
stephen hemminger5c578aed2010-03-17 20:31:11 +00005210 spin_lock_bh(&addrconf_hash_lock);
stephen hemmingerc2e21292010-03-17 20:31:10 +00005211 for (i = 0; i < IN6_ADDR_HSIZE; i++)
5212 WARN_ON(!hlist_empty(&inet6_addr_lst[i]));
stephen hemminger5c578aed2010-03-17 20:31:11 +00005213 spin_unlock_bh(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005214
5215 del_timer(&addr_chk_timer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005216 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07005217}