blob: 2a66eaad047fca314ad6529c1a1c381a2d9dad8d [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
dingtianhongba3542e2013-08-17 10:27:04 +0800102#define ADBG(fmt, ...) printk(fmt, ##__VA_ARGS__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103#else
dingtianhongba3542e2013-08-17 10:27:04 +0800104#define ADBG(fmt, ...) do { if (0) printk(fmt, ##__VA_ARGS__); } while (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105#endif
106
107#define INFINITY_LIFE_TIME 0xFFFFFFFF
Thomas Graf18a31e12010-11-17 04:12:02 +0000108
109static inline u32 cstamp_delta(unsigned long cstamp)
110{
111 return (cstamp - INITIAL_JIFFIES) * 100UL / HZ;
112}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
114#ifdef CONFIG_SYSCTL
Pavel Emelyanovf52295a2007-12-02 00:58:37 +1100115static void addrconf_sysctl_register(struct inet6_dev *idev);
Pavel Emelyanov408c4762008-01-10 17:41:21 -0800116static void addrconf_sysctl_unregister(struct inet6_dev *idev);
117#else
118static inline void addrconf_sysctl_register(struct inet6_dev *idev)
119{
120}
121
122static inline void addrconf_sysctl_unregister(struct inet6_dev *idev)
123{
124}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125#endif
126
127#ifdef CONFIG_IPV6_PRIVACY
Sorin Dumitrueb7e0572012-08-30 02:01:45 +0000128static void __ipv6_regen_rndid(struct inet6_dev *idev);
129static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130static void ipv6_regen_rndid(unsigned long data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131#endif
132
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900133static int ipv6_generate_eui64(u8 *eui, struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134static int ipv6_count_addresses(struct inet6_dev *idev);
135
136/*
137 * Configured unicast address hash table
138 */
stephen hemmingerc2e21292010-03-17 20:31:10 +0000139static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE];
stephen hemminger5c578ae2010-03-17 20:31:11 +0000140static DEFINE_SPINLOCK(addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142static void addrconf_verify(unsigned long);
143
Ingo Molnar8d06afa2005-09-09 13:10:40 -0700144static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145static DEFINE_SPINLOCK(addrconf_verify_lock);
146
147static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
148static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
149
Jiri Pirko93d9b7d2010-03-10 10:28:56 +0000150static void addrconf_type_change(struct net_device *dev,
151 unsigned long event);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152static int addrconf_ifdown(struct net_device *dev, int how);
153
Romain Kuntz21caa662013-01-09 21:06:03 +0000154static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx,
155 int plen,
156 const struct net_device *dev,
157 u32 flags, u32 noflags);
158
David S. Millercf22f9a2012-04-14 21:37:40 -0400159static void addrconf_dad_start(struct inet6_ifaddr *ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160static void addrconf_dad_timer(unsigned long data);
161static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +0900162static void addrconf_dad_run(struct inet6_dev *idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163static void addrconf_rs_timer(unsigned long data);
164static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
165static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
166
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900167static void inet6_prefix_notify(int event, struct inet6_dev *idev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 struct prefix_info *pinfo);
David S. Miller3e81c6d2010-03-20 16:18:00 -0700169static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
170 struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171
Adrian Bunk888c8482008-07-22 14:21:58 -0700172static struct ipv6_devconf ipv6_devconf __read_mostly = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 .forwarding = 0,
174 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
175 .mtu6 = IPV6_MIN_MTU,
176 .accept_ra = 1,
177 .accept_redirects = 1,
178 .autoconf = 1,
179 .force_mld_version = 0,
Hannes Frederic Sowafc4eba52013-08-14 01:03:46 +0200180 .mldv1_unsolicited_report_interval = 10 * HZ,
181 .mldv2_unsolicited_report_interval = HZ,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 .dad_transmits = 1,
183 .rtr_solicits = MAX_RTR_SOLICITATIONS,
184 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
185 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
186#ifdef CONFIG_IPV6_PRIVACY
187 .use_tempaddr = 0,
188 .temp_valid_lft = TEMP_VALID_LIFETIME,
189 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
190 .regen_max_retry = REGEN_MAX_RETRY,
191 .max_desync_factor = MAX_DESYNC_FACTOR,
192#endif
193 .max_addresses = IPV6_MAX_ADDRESSES,
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -0800194 .accept_ra_defrtr = 1,
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -0800195 .accept_ra_pinfo = 1,
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800196#ifdef CONFIG_IPV6_ROUTER_PREF
197 .accept_ra_rtr_pref = 1,
YOSHIFUJI Hideaki52e16352006-03-20 17:05:47 -0800198 .rtr_probe_interval = 60 * HZ,
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -0800199#ifdef CONFIG_IPV6_ROUTE_INFO
200 .accept_ra_rt_info_max_plen = 0,
201#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800202#endif
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -0700203 .proxy_ndp = 0,
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -0700204 .accept_source_route = 0, /* we do not accept RH0 by default. */
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +0900205 .disable_ipv6 = 0,
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900206 .accept_dad = 1,
Hannes Frederic Sowab800c3b2013-08-27 01:36:51 +0200207 .suppress_frag_ndisc = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208};
209
Brian Haleyab32ea52006-09-22 14:15:41 -0700210static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 .forwarding = 0,
212 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
213 .mtu6 = IPV6_MIN_MTU,
214 .accept_ra = 1,
215 .accept_redirects = 1,
216 .autoconf = 1,
Hannes Frederic Sowafc4eba52013-08-14 01:03:46 +0200217 .force_mld_version = 0,
218 .mldv1_unsolicited_report_interval = 10 * HZ,
219 .mldv2_unsolicited_report_interval = HZ,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 .dad_transmits = 1,
221 .rtr_solicits = MAX_RTR_SOLICITATIONS,
222 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
223 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
224#ifdef CONFIG_IPV6_PRIVACY
225 .use_tempaddr = 0,
226 .temp_valid_lft = TEMP_VALID_LIFETIME,
227 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
228 .regen_max_retry = REGEN_MAX_RETRY,
229 .max_desync_factor = MAX_DESYNC_FACTOR,
230#endif
231 .max_addresses = IPV6_MAX_ADDRESSES,
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -0800232 .accept_ra_defrtr = 1,
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -0800233 .accept_ra_pinfo = 1,
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800234#ifdef CONFIG_IPV6_ROUTER_PREF
235 .accept_ra_rtr_pref = 1,
YOSHIFUJI Hideaki52e16352006-03-20 17:05:47 -0800236 .rtr_probe_interval = 60 * HZ,
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -0800237#ifdef CONFIG_IPV6_ROUTE_INFO
238 .accept_ra_rt_info_max_plen = 0,
239#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800240#endif
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -0700241 .proxy_ndp = 0,
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -0700242 .accept_source_route = 0, /* we do not accept RH0 by default. */
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +0900243 .disable_ipv6 = 0,
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900244 .accept_dad = 1,
Hannes Frederic Sowab800c3b2013-08-27 01:36:51 +0200245 .suppress_frag_ndisc = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246};
247
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -0700248/* Check if a valid qdisc is available */
David S. Miller05297942008-07-08 23:01:27 -0700249static inline bool addrconf_qdisc_ok(const struct net_device *dev)
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -0700250{
David S. Miller05297942008-07-08 23:01:27 -0700251 return !qdisc_tx_is_noop(dev);
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -0700252}
253
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200254static void addrconf_del_rs_timer(struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255{
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200256 if (del_timer(&idev->rs_timer))
257 __in6_dev_put(idev);
258}
259
260static void addrconf_del_dad_timer(struct inet6_ifaddr *ifp)
261{
262 if (del_timer(&ifp->dad_timer))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 __in6_ifa_put(ifp);
264}
265
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200266static void addrconf_mod_rs_timer(struct inet6_dev *idev,
267 unsigned long when)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268{
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200269 if (!timer_pending(&idev->rs_timer))
270 in6_dev_hold(idev);
271 mod_timer(&idev->rs_timer, jiffies + when);
272}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200274static void addrconf_mod_dad_timer(struct inet6_ifaddr *ifp,
275 unsigned long when)
276{
277 if (!timer_pending(&ifp->dad_timer))
278 in6_ifa_hold(ifp);
279 mod_timer(&ifp->dad_timer, jiffies + when);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280}
281
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700282static int snmp6_alloc_dev(struct inet6_dev *idev)
283{
Tejun Heo7d720c32010-02-16 15:20:26 +0000284 if (snmp_mib_init((void __percpu **)idev->stats.ipv6,
Eric Dumazet1823e4c82010-06-22 20:58:41 +0000285 sizeof(struct ipstats_mib),
286 __alignof__(struct ipstats_mib)) < 0)
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700287 goto err_ip;
Eric Dumazetbe281e52011-05-19 01:14:23 +0000288 idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device),
289 GFP_KERNEL);
290 if (!idev->stats.icmpv6dev)
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700291 goto err_icmp;
Eric Dumazetbe281e52011-05-19 01:14:23 +0000292 idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device),
293 GFP_KERNEL);
294 if (!idev->stats.icmpv6msgdev)
David L Stevens14878f72007-09-16 16:52:35 -0700295 goto err_icmpmsg;
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700296
297 return 0;
298
David L Stevens14878f72007-09-16 16:52:35 -0700299err_icmpmsg:
Eric Dumazetbe281e52011-05-19 01:14:23 +0000300 kfree(idev->stats.icmpv6dev);
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700301err_icmp:
Tejun Heo7d720c32010-02-16 15:20:26 +0000302 snmp_mib_free((void __percpu **)idev->stats.ipv6);
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700303err_ip:
Pavel Emelyanovaaf70ec2007-10-17 21:25:32 -0700304 return -ENOMEM;
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700305}
306
Eldad Zack8e5e8f32012-04-01 07:49:08 +0000307static struct inet6_dev *ipv6_add_dev(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308{
309 struct inet6_dev *ndev;
310
311 ASSERT_RTNL();
312
313 if (dev->mtu < IPV6_MIN_MTU)
314 return NULL;
315
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900316 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900318 if (ndev == NULL)
319 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320
Ingo Oeser322f74a2006-03-20 23:01:47 -0800321 rwlock_init(&ndev->lock);
322 ndev->dev = dev;
stephen hemminger502a2ff2010-03-17 20:31:13 +0000323 INIT_LIST_HEAD(&ndev->addr_list);
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200324 setup_timer(&ndev->rs_timer, addrconf_rs_timer,
325 (unsigned long)ndev);
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900326 memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf));
Ingo Oeser322f74a2006-03-20 23:01:47 -0800327 ndev->cnf.mtu6 = dev->mtu;
328 ndev->cnf.sysctl = NULL;
329 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
330 if (ndev->nd_parms == NULL) {
331 kfree(ndev);
332 return NULL;
333 }
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700334 if (ndev->cnf.forwarding)
335 dev_disable_lro(dev);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800336 /* We refer to the device */
337 dev_hold(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338
Ingo Oeser322f74a2006-03-20 23:01:47 -0800339 if (snmp6_alloc_dev(ndev) < 0) {
dingtianhongba3542e2013-08-17 10:27:04 +0800340 ADBG(KERN_WARNING
Joe Perchesf3213832012-05-15 14:11:53 +0000341 "%s: cannot allocate memory for statistics; dev=%s.\n",
dingtianhongba3542e2013-08-17 10:27:04 +0800342 __func__, dev->name);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800343 neigh_parms_release(&nd_tbl, ndev->nd_parms);
Roy Li8603e332011-09-20 15:10:16 -0400344 dev_put(dev);
345 kfree(ndev);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800346 return NULL;
347 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348
Ingo Oeser322f74a2006-03-20 23:01:47 -0800349 if (snmp6_register_dev(ndev) < 0) {
dingtianhongba3542e2013-08-17 10:27:04 +0800350 ADBG(KERN_WARNING
Joe Perchesf3213832012-05-15 14:11:53 +0000351 "%s: cannot create /proc/net/dev_snmp6/%s\n",
dingtianhongba3542e2013-08-17 10:27:04 +0800352 __func__, dev->name);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800353 neigh_parms_release(&nd_tbl, ndev->nd_parms);
354 ndev->dead = 1;
355 in6_dev_finish_destroy(ndev);
356 return NULL;
357 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358
Ingo Oeser322f74a2006-03-20 23:01:47 -0800359 /* One reference from device. We must do this before
360 * we invoke __ipv6_regen_rndid().
361 */
362 in6_dev_hold(ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900364 if (dev->flags & (IFF_NOARP | IFF_LOOPBACK))
365 ndev->cnf.accept_dad = -1;
366
Amerigo Wang07a93622012-10-29 16:23:10 +0000367#if IS_ENABLED(CONFIG_IPV6_SIT)
YOSHIFUJI Hideakib077d7a2008-04-13 23:42:18 -0700368 if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) {
Joe Perchesf3213832012-05-15 14:11:53 +0000369 pr_info("%s: Disabled Multicast RS\n", dev->name);
YOSHIFUJI Hideakib077d7a2008-04-13 23:42:18 -0700370 ndev->cnf.rtr_solicits = 0;
371 }
372#endif
373
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374#ifdef CONFIG_IPV6_PRIVACY
stephen hemminger372e6c82010-03-17 20:31:09 +0000375 INIT_LIST_HEAD(&ndev->tempaddr_list);
Pavel Emelyanovb24b8a22008-01-23 21:20:07 -0800376 setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800377 if ((dev->flags&IFF_LOOPBACK) ||
378 dev->type == ARPHRD_TUNNEL ||
YOSHIFUJI Hideaki9625ed72008-04-13 23:47:11 -0700379 dev->type == ARPHRD_TUNNEL6 ||
Joerg Roedel0be669b2006-10-10 14:49:53 -0700380 dev->type == ARPHRD_SIT ||
Joerg Roedel0be669b2006-10-10 14:49:53 -0700381 dev->type == ARPHRD_NONE) {
Ingo Oeser322f74a2006-03-20 23:01:47 -0800382 ndev->cnf.use_tempaddr = -1;
383 } else {
384 in6_dev_hold(ndev);
385 ipv6_regen_rndid((unsigned long) ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 }
Ingo Oeser322f74a2006-03-20 23:01:47 -0800387#endif
Daniel Borkmann914faa12013-04-09 03:47:14 +0000388 ndev->token = in6addr_any;
Ingo Oeser322f74a2006-03-20 23:01:47 -0800389
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -0700390 if (netif_running(dev) && addrconf_qdisc_ok(dev))
Herbert Xu53aadcc2007-03-27 14:31:52 -0700391 ndev->if_flags |= IF_READY;
392
Ingo Oeser322f74a2006-03-20 23:01:47 -0800393 ipv6_mc_init_dev(ndev);
394 ndev->tstamp = jiffies;
Pavel Emelyanovf52295a2007-12-02 00:58:37 +1100395 addrconf_sysctl_register(ndev);
David L Stevens30c4cf52007-01-04 12:31:14 -0800396 /* protected by rtnl_lock */
Eric Dumazetcf778b02012-01-12 04:41:32 +0000397 rcu_assign_pointer(dev->ip6_ptr, ndev);
YOSHIFUJI Hideakid88ae4c2007-01-14 21:48:40 -0800398
Hannes Frederic Sowa2c5e8932013-02-10 03:50:18 +0000399 /* Join interface-local all-node multicast group */
400 ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allnodes);
401
YOSHIFUJI Hideakid88ae4c2007-01-14 21:48:40 -0800402 /* Join all-node multicast group */
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +0900403 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
YOSHIFUJI Hideakid88ae4c2007-01-14 21:48:40 -0800404
Li Weid6ddef92012-03-05 14:45:17 +0000405 /* Join all-router multicast group if forwarding is set */
Li Wei8b2aaed2012-03-07 14:58:07 +0000406 if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST))
Li Weid6ddef92012-03-05 14:45:17 +0000407 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
408
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 return ndev;
410}
411
Eldad Zack8e5e8f32012-04-01 07:49:08 +0000412static struct inet6_dev *ipv6_find_idev(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413{
414 struct inet6_dev *idev;
415
416 ASSERT_RTNL();
417
Stephen Hemmingere21e8462010-03-20 16:09:01 -0700418 idev = __in6_dev_get(dev);
419 if (!idev) {
420 idev = ipv6_add_dev(dev);
421 if (!idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 return NULL;
423 }
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +0900424
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 if (dev->flags&IFF_UP)
426 ipv6_mc_up(idev);
427 return idev;
428}
429
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000430static int inet6_netconf_msgsize_devconf(int type)
431{
432 int size = NLMSG_ALIGN(sizeof(struct netconfmsg))
433 + nla_total_size(4); /* NETCONFA_IFINDEX */
434
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000435 /* type -1 is used for ALL */
436 if (type == -1 || type == NETCONFA_FORWARDING)
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000437 size += nla_total_size(4);
David S. Millerb1afce92012-12-04 14:46:34 -0500438#ifdef CONFIG_IPV6_MROUTE
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000439 if (type == -1 || type == NETCONFA_MC_FORWARDING)
440 size += nla_total_size(4);
David S. Millerb1afce92012-12-04 14:46:34 -0500441#endif
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000442
443 return size;
444}
445
446static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex,
447 struct ipv6_devconf *devconf, u32 portid,
448 u32 seq, int event, unsigned int flags,
449 int type)
450{
451 struct nlmsghdr *nlh;
452 struct netconfmsg *ncm;
453
454 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg),
455 flags);
456 if (nlh == NULL)
457 return -EMSGSIZE;
458
459 ncm = nlmsg_data(nlh);
460 ncm->ncm_family = AF_INET6;
461
462 if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0)
463 goto nla_put_failure;
464
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000465 /* type -1 is used for ALL */
466 if ((type == -1 || type == NETCONFA_FORWARDING) &&
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000467 nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0)
468 goto nla_put_failure;
David S. Millerb1afce92012-12-04 14:46:34 -0500469#ifdef CONFIG_IPV6_MROUTE
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000470 if ((type == -1 || type == NETCONFA_MC_FORWARDING) &&
471 nla_put_s32(skb, NETCONFA_MC_FORWARDING,
472 devconf->mc_forwarding) < 0)
473 goto nla_put_failure;
David S. Millerb1afce92012-12-04 14:46:34 -0500474#endif
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000475 return nlmsg_end(skb, nlh);
476
477nla_put_failure:
478 nlmsg_cancel(skb, nlh);
479 return -EMSGSIZE;
480}
481
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000482void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
483 struct ipv6_devconf *devconf)
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000484{
485 struct sk_buff *skb;
486 int err = -ENOBUFS;
487
488 skb = nlmsg_new(inet6_netconf_msgsize_devconf(type), GFP_ATOMIC);
489 if (skb == NULL)
490 goto errout;
491
492 err = inet6_netconf_fill_devconf(skb, ifindex, devconf, 0, 0,
493 RTM_NEWNETCONF, 0, type);
494 if (err < 0) {
495 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
496 WARN_ON(err == -EMSGSIZE);
497 kfree_skb(skb);
498 goto errout;
499 }
500 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_NETCONF, NULL, GFP_ATOMIC);
501 return;
502errout:
Cong Dingbd779022012-12-18 12:08:56 +0000503 rtnl_set_sk_err(net, RTNLGRP_IPV6_NETCONF, err);
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000504}
505
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000506static const struct nla_policy devconf_ipv6_policy[NETCONFA_MAX+1] = {
507 [NETCONFA_IFINDEX] = { .len = sizeof(int) },
508 [NETCONFA_FORWARDING] = { .len = sizeof(int) },
509};
510
511static int inet6_netconf_get_devconf(struct sk_buff *in_skb,
Thomas Graf661d2962013-03-21 07:45:29 +0000512 struct nlmsghdr *nlh)
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000513{
514 struct net *net = sock_net(in_skb->sk);
515 struct nlattr *tb[NETCONFA_MAX+1];
516 struct netconfmsg *ncm;
517 struct sk_buff *skb;
518 struct ipv6_devconf *devconf;
519 struct inet6_dev *in6_dev;
520 struct net_device *dev;
521 int ifindex;
522 int err;
523
524 err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX,
525 devconf_ipv6_policy);
526 if (err < 0)
527 goto errout;
528
529 err = EINVAL;
530 if (!tb[NETCONFA_IFINDEX])
531 goto errout;
532
533 ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]);
534 switch (ifindex) {
535 case NETCONFA_IFINDEX_ALL:
536 devconf = net->ipv6.devconf_all;
537 break;
538 case NETCONFA_IFINDEX_DEFAULT:
539 devconf = net->ipv6.devconf_dflt;
540 break;
541 default:
542 dev = __dev_get_by_index(net, ifindex);
543 if (dev == NULL)
544 goto errout;
545 in6_dev = __in6_dev_get(dev);
546 if (in6_dev == NULL)
547 goto errout;
548 devconf = &in6_dev->cnf;
549 break;
550 }
551
552 err = -ENOBUFS;
553 skb = nlmsg_new(inet6_netconf_msgsize_devconf(-1), GFP_ATOMIC);
554 if (skb == NULL)
555 goto errout;
556
557 err = inet6_netconf_fill_devconf(skb, ifindex, devconf,
558 NETLINK_CB(in_skb).portid,
559 nlh->nlmsg_seq, RTM_NEWNETCONF, 0,
560 -1);
561 if (err < 0) {
562 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
563 WARN_ON(err == -EMSGSIZE);
564 kfree_skb(skb);
565 goto errout;
566 }
567 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
568errout:
569 return err;
570}
571
Nicolas Dichtel7a674202013-03-05 23:42:06 +0000572static int inet6_netconf_dump_devconf(struct sk_buff *skb,
573 struct netlink_callback *cb)
574{
575 struct net *net = sock_net(skb->sk);
576 int h, s_h;
577 int idx, s_idx;
578 struct net_device *dev;
579 struct inet6_dev *idev;
580 struct hlist_head *head;
581
582 s_h = cb->args[0];
583 s_idx = idx = cb->args[1];
584
585 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
586 idx = 0;
587 head = &net->dev_index_head[h];
588 rcu_read_lock();
Nicolas Dichtel63998ac2013-03-22 06:28:43 +0000589 cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^
590 net->dev_base_seq;
Nicolas Dichtel7a674202013-03-05 23:42:06 +0000591 hlist_for_each_entry_rcu(dev, head, index_hlist) {
592 if (idx < s_idx)
593 goto cont;
594 idev = __in6_dev_get(dev);
595 if (!idev)
596 goto cont;
597
598 if (inet6_netconf_fill_devconf(skb, dev->ifindex,
599 &idev->cnf,
600 NETLINK_CB(cb->skb).portid,
601 cb->nlh->nlmsg_seq,
602 RTM_NEWNETCONF,
603 NLM_F_MULTI,
604 -1) <= 0) {
605 rcu_read_unlock();
606 goto done;
607 }
Nicolas Dichtel63998ac2013-03-22 06:28:43 +0000608 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
Nicolas Dichtel7a674202013-03-05 23:42:06 +0000609cont:
610 idx++;
611 }
612 rcu_read_unlock();
613 }
614 if (h == NETDEV_HASHENTRIES) {
615 if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL,
616 net->ipv6.devconf_all,
617 NETLINK_CB(cb->skb).portid,
618 cb->nlh->nlmsg_seq,
619 RTM_NEWNETCONF, NLM_F_MULTI,
620 -1) <= 0)
621 goto done;
622 else
623 h++;
624 }
625 if (h == NETDEV_HASHENTRIES + 1) {
626 if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT,
627 net->ipv6.devconf_dflt,
628 NETLINK_CB(cb->skb).portid,
629 cb->nlh->nlmsg_seq,
630 RTM_NEWNETCONF, NLM_F_MULTI,
631 -1) <= 0)
632 goto done;
633 else
634 h++;
635 }
636done:
637 cb->args[0] = h;
638 cb->args[1] = idx;
639
640 return skb->len;
641}
642
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643#ifdef CONFIG_SYSCTL
644static void dev_forward_change(struct inet6_dev *idev)
645{
646 struct net_device *dev;
647 struct inet6_ifaddr *ifa;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648
649 if (!idev)
650 return;
651 dev = idev->dev;
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700652 if (idev->cnf.forwarding)
653 dev_disable_lro(dev);
Amerigo Wang1a940832012-10-28 17:43:53 +0000654 if (dev->flags & IFF_MULTICAST) {
Hannes Frederic Sowa2c5e8932013-02-10 03:50:18 +0000655 if (idev->cnf.forwarding) {
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +0900656 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
Hannes Frederic Sowa2c5e8932013-02-10 03:50:18 +0000657 ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allrouters);
658 ipv6_dev_mc_inc(dev, &in6addr_sitelocal_allrouters);
659 } else {
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +0900660 ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters);
Hannes Frederic Sowa2c5e8932013-02-10 03:50:18 +0000661 ipv6_dev_mc_dec(dev, &in6addr_interfacelocal_allrouters);
662 ipv6_dev_mc_dec(dev, &in6addr_sitelocal_allrouters);
663 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 }
stephen hemminger502a2ff2010-03-17 20:31:13 +0000665
666 list_for_each_entry(ifa, &idev->addr_list, if_list) {
Michal Wrobel2c12a742007-02-26 15:36:10 -0800667 if (ifa->flags&IFA_F_TENTATIVE)
668 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669 if (idev->cnf.forwarding)
670 addrconf_join_anycast(ifa);
671 else
672 addrconf_leave_anycast(ifa);
673 }
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000674 inet6_netconf_notify_devconf(dev_net(dev), NETCONFA_FORWARDING,
675 dev->ifindex, &idev->cnf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676}
677
678
Pavel Emelyanove1869322008-01-10 17:43:50 -0800679static void addrconf_forward_change(struct net *net, __s32 newf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680{
681 struct net_device *dev;
682 struct inet6_dev *idev;
683
Ben Hutchings4acd4942012-08-14 08:54:51 +0000684 for_each_netdev(net, dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685 idev = __in6_dev_get(dev);
686 if (idev) {
Pavel Emelyanove1869322008-01-10 17:43:50 -0800687 int changed = (!idev->cnf.forwarding) ^ (!newf);
688 idev->cnf.forwarding = newf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 if (changed)
690 dev_forward_change(idev);
691 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693}
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800694
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000695static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf)
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800696{
Pavel Emelyanovbff16c22008-01-10 17:42:13 -0800697 struct net *net;
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000698 int old;
699
700 if (!rtnl_trylock())
701 return restart_syscall();
Pavel Emelyanovbff16c22008-01-10 17:42:13 -0800702
703 net = (struct net *)table->extra2;
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000704 old = *p;
705 *p = newf;
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800706
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000707 if (p == &net->ipv6.devconf_dflt->forwarding) {
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000708 if ((!newf) ^ (!old))
709 inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING,
710 NETCONFA_IFINDEX_DEFAULT,
711 net->ipv6.devconf_dflt);
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000712 rtnl_unlock();
713 return 0;
Eric W. Biederman88af1822010-02-19 13:22:59 +0000714 }
Stephen Hemmingerb325fdd2009-02-26 06:55:31 +0000715
Pavel Emelyanove1869322008-01-10 17:43:50 -0800716 if (p == &net->ipv6.devconf_all->forwarding) {
Pavel Emelyanove1869322008-01-10 17:43:50 -0800717 net->ipv6.devconf_dflt->forwarding = newf;
718 addrconf_forward_change(net, newf);
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000719 if ((!newf) ^ (!old))
720 inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING,
721 NETCONFA_IFINDEX_ALL,
722 net->ipv6.devconf_all);
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000723 } else if ((!newf) ^ (!old))
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800724 dev_forward_change((struct inet6_dev *)table->extra1);
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700725 rtnl_unlock();
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800726
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000727 if (newf)
Daniel Lezcano7b4da532008-03-04 13:47:14 -0800728 rt6_purge_dflt_routers(net);
Stephen Hemmingerb325fdd2009-02-26 06:55:31 +0000729 return 1;
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800730}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731#endif
732
stephen hemminger5c578ae2010-03-17 20:31:11 +0000733/* Nobody refers to this ifaddr, destroy it */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
735{
stephen hemmingerc2e21292010-03-17 20:31:10 +0000736 WARN_ON(!hlist_unhashed(&ifp->addr_lst));
Ilpo Järvinen547b7922008-07-25 21:43:18 -0700737
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738#ifdef NET_REFCNT_DEBUG
Joe Perches91df42b2012-05-15 14:11:54 +0000739 pr_debug("%s\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740#endif
741
742 in6_dev_put(ifp->idev);
743
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200744 if (del_timer(&ifp->dad_timer))
Stephen Hemmingere21e8462010-03-20 16:09:01 -0700745 pr_notice("Timer is still running, when freeing ifa=%p\n", ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746
Herbert Xue9d3e082010-05-18 15:36:06 -0700747 if (ifp->state != INET6_IFADDR_STATE_DEAD) {
Joe Perchesf3213832012-05-15 14:11:53 +0000748 pr_warn("Freeing alive inet6 address %p\n", ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749 return;
750 }
Amerigo Wang94e187c2012-10-29 00:13:19 +0000751 ip6_rt_put(ifp->rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752
Lai Jiangshane5785982011-03-15 18:00:14 +0800753 kfree_rcu(ifp, rcu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754}
755
Brian Haleye55ffac2006-07-10 15:25:51 -0700756static void
757ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
758{
stephen hemminger502a2ff2010-03-17 20:31:13 +0000759 struct list_head *p;
YOSHIFUJI Hideaki8a6ce0c2006-07-11 13:05:30 -0700760 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
Brian Haleye55ffac2006-07-10 15:25:51 -0700761
762 /*
763 * Each device address list is sorted in order of scope -
764 * global before linklocal.
765 */
stephen hemminger502a2ff2010-03-17 20:31:13 +0000766 list_for_each(p, &idev->addr_list) {
767 struct inet6_ifaddr *ifa
768 = list_entry(p, struct inet6_ifaddr, if_list);
YOSHIFUJI Hideaki8a6ce0c2006-07-11 13:05:30 -0700769 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
Brian Haleye55ffac2006-07-10 15:25:51 -0700770 break;
771 }
772
David S. Millerb54c9b92010-03-25 21:25:30 -0700773 list_add_tail(&ifp->if_list, p);
Brian Haleye55ffac2006-07-10 15:25:51 -0700774}
775
Eric Dumazetddbe5032012-07-18 08:11:12 +0000776static u32 inet6_addr_hash(const struct in6_addr *addr)
YOSHIFUJI Hideaki3eb84f42008-04-10 15:42:08 +0900777{
Eric Dumazetddbe5032012-07-18 08:11:12 +0000778 return hash_32(ipv6_addr_hash(addr), IN6_ADDR_HSIZE_SHIFT);
YOSHIFUJI Hideaki3eb84f42008-04-10 15:42:08 +0900779}
780
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781/* On success it returns ifp with increased reference count */
782
783static struct inet6_ifaddr *
Jiri Pirko3f8f5292013-08-01 10:41:27 +0200784ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
785 const struct in6_addr *peer_addr, int pfxlen,
Jiri Benc8a226b22013-08-01 10:41:28 +0200786 int scope, u32 flags, u32 valid_lft, u32 prefered_lft)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787{
788 struct inet6_ifaddr *ifa = NULL;
789 struct rt6_info *rt;
stephen hemminger3a88a812010-03-17 20:31:12 +0000790 unsigned int hash;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791 int err = 0;
YOSHIFUJI Hideakid68b8272008-06-25 16:26:47 +0900792 int addr_type = ipv6_addr_type(addr);
793
794 if (addr_type == IPV6_ADDR_ANY ||
795 addr_type & IPV6_ADDR_MULTICAST ||
796 (!(idev->dev->flags & IFF_LOOPBACK) &&
797 addr_type & IPV6_ADDR_LOOPBACK))
798 return ERR_PTR(-EADDRNOTAVAIL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700800 rcu_read_lock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 if (idev->dead) {
802 err = -ENODEV; /*XXX*/
803 goto out2;
804 }
805
Brian Haley56d417b2009-06-01 03:07:33 -0700806 if (idev->cnf.disable_ipv6) {
Brian Haley9bdd8d42009-03-18 18:22:48 -0700807 err = -EACCES;
808 goto out2;
809 }
810
stephen hemminger5c578ae2010-03-17 20:31:11 +0000811 spin_lock(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812
813 /* Ignore adding duplicate addresses on an interface */
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900814 if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) {
dingtianhongba3542e2013-08-17 10:27:04 +0800815 ADBG("ipv6_add_addr: already assigned\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816 err = -EEXIST;
817 goto out;
818 }
819
Ingo Oeser322f74a2006-03-20 23:01:47 -0800820 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821
822 if (ifa == NULL) {
dingtianhongba3542e2013-08-17 10:27:04 +0800823 ADBG("ipv6_add_addr: malloc failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 err = -ENOBUFS;
825 goto out;
826 }
827
David S. Miller8f031512011-12-06 16:48:14 -0500828 rt = addrconf_dst_alloc(idev, addr, false);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 if (IS_ERR(rt)) {
830 err = PTR_ERR(rt);
831 goto out;
832 }
833
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000834 ifa->addr = *addr;
Jiri Pirko3f8f5292013-08-01 10:41:27 +0200835 if (peer_addr)
836 ifa->peer_addr = *peer_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837
838 spin_lock_init(&ifa->lock);
Herbert Xue9d3e082010-05-18 15:36:06 -0700839 spin_lock_init(&ifa->state_lock);
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200840 setup_timer(&ifa->dad_timer, addrconf_dad_timer,
841 (unsigned long)ifa);
stephen hemmingerc2e21292010-03-17 20:31:10 +0000842 INIT_HLIST_NODE(&ifa->addr_lst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843 ifa->scope = scope;
844 ifa->prefix_len = pfxlen;
845 ifa->flags = flags | IFA_F_TENTATIVE;
Jiri Benc8a226b22013-08-01 10:41:28 +0200846 ifa->valid_lft = valid_lft;
847 ifa->prefered_lft = prefered_lft;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848 ifa->cstamp = ifa->tstamp = jiffies;
Daniel Borkmann617fe292013-04-09 03:47:16 +0000849 ifa->tokenized = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850
Keir Fraser57f5f542006-08-29 02:43:49 -0700851 ifa->rt = rt;
852
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853 ifa->idev = idev;
854 in6_dev_hold(idev);
855 /* For caller */
856 in6_ifa_hold(ifa);
857
858 /* Add to big hash table */
Eric Dumazetddbe5032012-07-18 08:11:12 +0000859 hash = inet6_addr_hash(addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860
stephen hemminger5c578ae2010-03-17 20:31:11 +0000861 hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]);
stephen hemminger5c578ae2010-03-17 20:31:11 +0000862 spin_unlock(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863
864 write_lock(&idev->lock);
865 /* Add to inet6_dev unicast addr list. */
Brian Haleye55ffac2006-07-10 15:25:51 -0700866 ipv6_link_dev_addr(idev, ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867
868#ifdef CONFIG_IPV6_PRIVACY
869 if (ifa->flags&IFA_F_TEMPORARY) {
stephen hemminger372e6c82010-03-17 20:31:09 +0000870 list_add(&ifa->tmp_list, &idev->tempaddr_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871 in6_ifa_hold(ifa);
872 }
873#endif
874
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875 in6_ifa_hold(ifa);
876 write_unlock(&idev->lock);
877out2:
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700878 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879
YOSHIFUJI Hideakifd928332005-04-19 22:27:09 -0700880 if (likely(err == 0))
Cong Wangf88c91d2013-04-14 23:18:43 +0800881 inet6addr_notifier_call_chain(NETDEV_UP, ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882 else {
883 kfree(ifa);
884 ifa = ERR_PTR(err);
885 }
886
887 return ifa;
888out:
stephen hemminger5c578ae2010-03-17 20:31:11 +0000889 spin_unlock(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890 goto out2;
891}
892
893/* This function wants to get referenced ifp and releases it before return */
894
895static void ipv6_del_addr(struct inet6_ifaddr *ifp)
896{
stephen hemminger502a2ff2010-03-17 20:31:13 +0000897 struct inet6_ifaddr *ifa, *ifn;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898 struct inet6_dev *idev = ifp->idev;
Herbert Xu4c5ff6a2010-05-18 15:54:18 -0700899 int state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900 int deleted = 0, onlink = 0;
901 unsigned long expires = jiffies;
902
Herbert Xu4c5ff6a2010-05-18 15:54:18 -0700903 spin_lock_bh(&ifp->state_lock);
904 state = ifp->state;
Herbert Xue9d3e082010-05-18 15:36:06 -0700905 ifp->state = INET6_IFADDR_STATE_DEAD;
Herbert Xu4c5ff6a2010-05-18 15:54:18 -0700906 spin_unlock_bh(&ifp->state_lock);
907
908 if (state == INET6_IFADDR_STATE_DEAD)
909 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910
stephen hemminger5c578ae2010-03-17 20:31:11 +0000911 spin_lock_bh(&addrconf_hash_lock);
912 hlist_del_init_rcu(&ifp->addr_lst);
stephen hemminger5c578ae2010-03-17 20:31:11 +0000913 spin_unlock_bh(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914
915 write_lock_bh(&idev->lock);
916#ifdef CONFIG_IPV6_PRIVACY
917 if (ifp->flags&IFA_F_TEMPORARY) {
stephen hemminger372e6c82010-03-17 20:31:09 +0000918 list_del(&ifp->tmp_list);
919 if (ifp->ifpub) {
920 in6_ifa_put(ifp->ifpub);
921 ifp->ifpub = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922 }
stephen hemminger372e6c82010-03-17 20:31:09 +0000923 __in6_ifa_put(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924 }
925#endif
926
stephen hemminger502a2ff2010-03-17 20:31:13 +0000927 list_for_each_entry_safe(ifa, ifn, &idev->addr_list, if_list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928 if (ifa == ifp) {
stephen hemminger502a2ff2010-03-17 20:31:13 +0000929 list_del_init(&ifp->if_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930 __in6_ifa_put(ifp);
stephen hemminger502a2ff2010-03-17 20:31:13 +0000931
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
933 break;
934 deleted = 1;
Kristian Slavov1d142802005-12-21 18:47:24 -0800935 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936 } else if (ifp->flags & IFA_F_PERMANENT) {
937 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
938 ifp->prefix_len)) {
939 if (ifa->flags & IFA_F_PERMANENT) {
940 onlink = 1;
941 if (deleted)
942 break;
943 } else {
944 unsigned long lifetime;
945
946 if (!onlink)
947 onlink = -1;
948
949 spin_lock(&ifa->lock);
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +0900950
951 lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ);
952 /*
953 * Note: Because this address is
954 * not permanent, lifetime <
955 * LONG_MAX / HZ here.
956 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957 if (time_before(expires,
958 ifa->tstamp + lifetime * HZ))
959 expires = ifa->tstamp + lifetime * HZ;
960 spin_unlock(&ifa->lock);
961 }
962 }
963 }
964 }
965 write_unlock_bh(&idev->lock);
966
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200967 addrconf_del_dad_timer(ifp);
Andrey Vaginb2238562008-07-08 15:13:31 -0700968
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969 ipv6_ifa_notify(RTM_DELADDR, ifp);
970
Cong Wangf88c91d2013-04-14 23:18:43 +0800971 inet6addr_notifier_call_chain(NETDEV_DOWN, ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973 /*
974 * Purge or update corresponding prefix
975 *
976 * 1) we don't purge prefix here if address was not permanent.
977 * prefix is managed by its own lifetime.
978 * 2) if there're no addresses, delete prefix.
979 * 3) if there're still other permanent address(es),
980 * corresponding prefix is still permanent.
981 * 4) otherwise, update prefix lifetime to the
982 * longest valid lifetime among the corresponding
983 * addresses on the device.
984 * Note: subsequent RA will update lifetime.
985 *
986 * --yoshfuji
987 */
988 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
989 struct in6_addr prefix;
990 struct rt6_info *rt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991
Nicolas Dichtel64c6d082012-09-26 00:04:55 +0000992 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
Nicolas Dichtel64c6d082012-09-26 00:04:55 +0000993
Romain Kuntz21caa662013-01-09 21:06:03 +0000994 rt = addrconf_get_prefix_route(&prefix,
995 ifp->prefix_len,
996 ifp->idev->dev,
997 0, RTF_GATEWAY | RTF_DEFAULT);
998
999 if (rt) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000 if (onlink == 0) {
Thomas Grafe0a1ad732006-08-22 00:00:21 -07001001 ip6_del_rt(rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001002 rt = NULL;
1003 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
Gao feng1716a962012-04-06 00:13:10 +00001004 rt6_set_expires(rt, expires);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001005 }
1006 }
Amerigo Wang94e187c2012-10-29 00:13:19 +00001007 ip6_rt_put(rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008 }
1009
Daniel Walterc3968a82011-04-13 21:10:57 +00001010 /* clean up prefsrc entries */
1011 rt6_remove_prefsrc(ifp);
Herbert Xu4c5ff6a2010-05-18 15:54:18 -07001012out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013 in6_ifa_put(ifp);
1014}
1015
1016#ifdef CONFIG_IPV6_PRIVACY
1017static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
1018{
1019 struct inet6_dev *idev = ifp->idev;
1020 struct in6_addr addr, *tmpaddr;
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00001021 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age;
Benoit Boissinoteac55bf2008-04-02 00:01:35 -07001022 unsigned long regen_advance;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023 int tmp_plen;
1024 int ret = 0;
1025 int max_addresses;
Neil Horman95c385b2007-04-25 17:08:10 -07001026 u32 addr_flags;
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00001027 unsigned long now = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028
1029 write_lock(&idev->lock);
1030 if (ift) {
1031 spin_lock_bh(&ift->lock);
1032 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
1033 spin_unlock_bh(&ift->lock);
1034 tmpaddr = &addr;
1035 } else {
1036 tmpaddr = NULL;
1037 }
1038retry:
1039 in6_dev_hold(idev);
1040 if (idev->cnf.use_tempaddr <= 0) {
1041 write_unlock(&idev->lock);
Joe Perchesf3213832012-05-15 14:11:53 +00001042 pr_info("%s: use_tempaddr is disabled\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043 in6_dev_put(idev);
1044 ret = -1;
1045 goto out;
1046 }
1047 spin_lock_bh(&ifp->lock);
1048 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
1049 idev->cnf.use_tempaddr = -1; /*XXX*/
1050 spin_unlock_bh(&ifp->lock);
1051 write_unlock(&idev->lock);
Joe Perchesf3213832012-05-15 14:11:53 +00001052 pr_warn("%s: regeneration time exceeded - disabled temporary address support\n",
1053 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054 in6_dev_put(idev);
1055 ret = -1;
1056 goto out;
1057 }
1058 in6_ifa_hold(ifp);
1059 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00001060 __ipv6_try_regen_rndid(idev, tmpaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061 memcpy(&addr.s6_addr[8], idev->rndid, 8);
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00001062 age = (now - ifp->tstamp) / HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063 tmp_valid_lft = min_t(__u32,
1064 ifp->valid_lft,
Glenn Wurster7a876b02010-09-27 07:10:10 +00001065 idev->cnf.temp_valid_lft + age);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001066 tmp_prefered_lft = min_t(__u32,
1067 ifp->prefered_lft,
Glenn Wurster7a876b02010-09-27 07:10:10 +00001068 idev->cnf.temp_prefered_lft + age -
Ben Hutchings784e2712010-06-26 11:42:55 +00001069 idev->cnf.max_desync_factor);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 tmp_plen = ifp->prefix_len;
1071 max_addresses = idev->cnf.max_addresses;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 tmp_tstamp = ifp->tstamp;
1073 spin_unlock_bh(&ifp->lock);
1074
Benoit Boissinoteac55bf2008-04-02 00:01:35 -07001075 regen_advance = idev->cnf.regen_max_retry *
David S. Miller7eaa48a2013-08-20 23:44:39 -07001076 idev->cnf.dad_transmits *
1077 idev->nd_parms->retrans_time / HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078 write_unlock(&idev->lock);
Neil Horman95c385b2007-04-25 17:08:10 -07001079
Benoit Boissinoteac55bf2008-04-02 00:01:35 -07001080 /* A temporary address is created only if this calculated Preferred
1081 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
1082 * an implementation must not create a temporary address with a zero
1083 * Preferred Lifetime.
1084 */
1085 if (tmp_prefered_lft <= regen_advance) {
1086 in6_ifa_put(ifp);
1087 in6_dev_put(idev);
1088 ret = -1;
1089 goto out;
1090 }
1091
Neil Horman95c385b2007-04-25 17:08:10 -07001092 addr_flags = IFA_F_TEMPORARY;
1093 /* set in addrconf_prefix_rcv() */
1094 if (ifp->flags & IFA_F_OPTIMISTIC)
1095 addr_flags |= IFA_F_OPTIMISTIC;
1096
Hannes Frederic Sowa4b08a8f2013-08-16 13:02:27 +02001097 ift = ipv6_add_addr(idev, &addr, NULL, tmp_plen,
1098 ipv6_addr_scope(&addr), addr_flags,
1099 tmp_valid_lft, tmp_prefered_lft);
1100 if (IS_ERR(ift)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101 in6_ifa_put(ifp);
1102 in6_dev_put(idev);
Joe Perchesf3213832012-05-15 14:11:53 +00001103 pr_info("%s: retry temporary address regeneration\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104 tmpaddr = &addr;
1105 write_lock(&idev->lock);
1106 goto retry;
1107 }
1108
1109 spin_lock_bh(&ift->lock);
1110 ift->ifpub = ifp;
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00001111 ift->cstamp = now;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112 ift->tstamp = tmp_tstamp;
1113 spin_unlock_bh(&ift->lock);
1114
David S. Millercf22f9a2012-04-14 21:37:40 -04001115 addrconf_dad_start(ift);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116 in6_ifa_put(ift);
1117 in6_dev_put(idev);
1118out:
1119 return ret;
1120}
1121#endif
1122
1123/*
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001124 * Choose an appropriate source address (RFC3484)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125 */
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001126enum {
1127 IPV6_SADDR_RULE_INIT = 0,
1128 IPV6_SADDR_RULE_LOCAL,
1129 IPV6_SADDR_RULE_SCOPE,
1130 IPV6_SADDR_RULE_PREFERRED,
1131#ifdef CONFIG_IPV6_MIP6
1132 IPV6_SADDR_RULE_HOA,
1133#endif
1134 IPV6_SADDR_RULE_OIF,
1135 IPV6_SADDR_RULE_LABEL,
1136#ifdef CONFIG_IPV6_PRIVACY
1137 IPV6_SADDR_RULE_PRIVACY,
1138#endif
1139 IPV6_SADDR_RULE_ORCHID,
1140 IPV6_SADDR_RULE_PREFIX,
1141 IPV6_SADDR_RULE_MAX
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001142};
1143
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001144struct ipv6_saddr_score {
1145 int rule;
1146 int addr_type;
1147 struct inet6_ifaddr *ifa;
1148 DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX);
1149 int scopedist;
1150 int matchlen;
1151};
1152
1153struct ipv6_saddr_dst {
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +09001154 const struct in6_addr *addr;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001155 int ifindex;
1156 int scope;
1157 int label;
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001158 unsigned int prefs;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001159};
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001160
Dave Jonesb6f99a22007-03-22 12:27:49 -07001161static inline int ipv6_saddr_preferred(int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162{
Ulrich Weber45bb0062010-02-25 23:28:58 +00001163 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK))
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001164 return 1;
1165 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166}
1167
Benjamin Thery3de23252008-05-28 14:51:24 +02001168static int ipv6_get_saddr_eval(struct net *net,
1169 struct ipv6_saddr_score *score,
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001170 struct ipv6_saddr_dst *dst,
1171 int i)
1172{
1173 int ret;
1174
1175 if (i <= score->rule) {
1176 switch (i) {
1177 case IPV6_SADDR_RULE_SCOPE:
1178 ret = score->scopedist;
1179 break;
1180 case IPV6_SADDR_RULE_PREFIX:
1181 ret = score->matchlen;
1182 break;
1183 default:
1184 ret = !!test_bit(i, score->scorebits);
1185 }
1186 goto out;
1187 }
1188
1189 switch (i) {
1190 case IPV6_SADDR_RULE_INIT:
1191 /* Rule 0: remember if hiscore is not ready yet */
1192 ret = !!score->ifa;
1193 break;
1194 case IPV6_SADDR_RULE_LOCAL:
1195 /* Rule 1: Prefer same address */
1196 ret = ipv6_addr_equal(&score->ifa->addr, dst->addr);
1197 break;
1198 case IPV6_SADDR_RULE_SCOPE:
1199 /* Rule 2: Prefer appropriate scope
1200 *
1201 * ret
1202 * ^
1203 * -1 | d 15
1204 * ---+--+-+---> scope
1205 * |
1206 * | d is scope of the destination.
1207 * B-d | \
1208 * | \ <- smaller scope is better if
1209 * B-15 | \ if scope is enough for destinaion.
1210 * | ret = B - scope (-1 <= scope >= d <= 15).
1211 * d-C-1 | /
1212 * |/ <- greater is better
1213 * -C / if scope is not enough for destination.
1214 * /| ret = scope - C (-1 <= d < scope <= 15).
1215 *
1216 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1217 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1218 * Assume B = 0 and we get C > 29.
1219 */
1220 ret = __ipv6_addr_src_scope(score->addr_type);
1221 if (ret >= dst->scope)
1222 ret = -ret;
1223 else
1224 ret -= 128; /* 30 is enough */
1225 score->scopedist = ret;
1226 break;
1227 case IPV6_SADDR_RULE_PREFERRED:
1228 /* Rule 3: Avoid deprecated and optimistic addresses */
1229 ret = ipv6_saddr_preferred(score->addr_type) ||
1230 !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC));
1231 break;
1232#ifdef CONFIG_IPV6_MIP6
1233 case IPV6_SADDR_RULE_HOA:
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001234 {
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001235 /* Rule 4: Prefer home address */
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001236 int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA);
1237 ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001238 break;
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001239 }
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001240#endif
1241 case IPV6_SADDR_RULE_OIF:
1242 /* Rule 5: Prefer outgoing interface */
1243 ret = (!dst->ifindex ||
1244 dst->ifindex == score->ifa->idev->dev->ifindex);
1245 break;
1246 case IPV6_SADDR_RULE_LABEL:
1247 /* Rule 6: Prefer matching label */
Benjamin Thery3de23252008-05-28 14:51:24 +02001248 ret = ipv6_addr_label(net,
1249 &score->ifa->addr, score->addr_type,
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001250 score->ifa->idev->dev->ifindex) == dst->label;
1251 break;
1252#ifdef CONFIG_IPV6_PRIVACY
1253 case IPV6_SADDR_RULE_PRIVACY:
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001254 {
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001255 /* Rule 7: Prefer public address
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001256 * Note: prefer temporary address if use_tempaddr >= 2
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001257 */
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001258 int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ?
1259 !!(dst->prefs & IPV6_PREFER_SRC_TMP) :
1260 score->ifa->idev->cnf.use_tempaddr >= 2;
1261 ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001262 break;
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001263 }
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001264#endif
1265 case IPV6_SADDR_RULE_ORCHID:
1266 /* Rule 8-: Prefer ORCHID vs ORCHID or
1267 * non-ORCHID vs non-ORCHID
1268 */
1269 ret = !(ipv6_addr_orchid(&score->ifa->addr) ^
1270 ipv6_addr_orchid(dst->addr));
1271 break;
1272 case IPV6_SADDR_RULE_PREFIX:
1273 /* Rule 8: Use longest matching prefix */
YOSHIFUJI Hideaki / 吉藤英明91b4b042012-09-10 18:41:07 +00001274 ret = ipv6_addr_diff(&score->ifa->addr, dst->addr);
1275 if (ret > score->ifa->prefix_len)
1276 ret = score->ifa->prefix_len;
1277 score->matchlen = ret;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001278 break;
1279 default:
1280 ret = 0;
1281 }
1282
1283 if (ret)
1284 __set_bit(i, score->scorebits);
1285 score->rule = i;
1286out:
1287 return ret;
1288}
1289
Patrick McHardyb3f644f2012-08-26 19:14:14 +02001290int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +09001291 const struct in6_addr *daddr, unsigned int prefs,
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001292 struct in6_addr *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001293{
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001294 struct ipv6_saddr_score scores[2],
1295 *score = &scores[0], *hiscore = &scores[1];
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001296 struct ipv6_saddr_dst dst;
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001297 struct net_device *dev;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001298 int dst_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001299
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001300 dst_type = __ipv6_addr_type(daddr);
1301 dst.addr = daddr;
1302 dst.ifindex = dst_dev ? dst_dev->ifindex : 0;
1303 dst.scope = __ipv6_addr_src_scope(dst_type);
Benjamin Thery3de23252008-05-28 14:51:24 +02001304 dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex);
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001305 dst.prefs = prefs;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001306
1307 hiscore->rule = -1;
1308 hiscore->ifa = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001310 rcu_read_lock();
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001311
Eric Dumazetc6d14c82009-11-04 05:43:23 -08001312 for_each_netdev_rcu(net, dev) {
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001313 struct inet6_dev *idev;
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001314
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001315 /* Candidate Source Address (section 4)
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001316 * - multicast and link-local destination address,
1317 * the set of candidate source address MUST only
1318 * include addresses assigned to interfaces
1319 * belonging to the same link as the outgoing
1320 * interface.
1321 * (- For site-local destination addresses, the
1322 * set of candidate source addresses MUST only
1323 * include addresses assigned to interfaces
1324 * belonging to the same site as the outgoing
1325 * interface.)
1326 */
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001327 if (((dst_type & IPV6_ADDR_MULTICAST) ||
1328 dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
1329 dst.ifindex && dev->ifindex != dst.ifindex)
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001330 continue;
1331
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332 idev = __in6_dev_get(dev);
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001333 if (!idev)
1334 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001336 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00001337 list_for_each_entry(score->ifa, &idev->addr_list, if_list) {
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001338 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001340 /*
YOSHIFUJI Hideaki6b3ae802005-12-21 22:58:01 +09001341 * - Tentative Address (RFC2462 section 5.4)
1342 * - A tentative address is not considered
1343 * "assigned to an interface" in the traditional
Neil Horman95c385b2007-04-25 17:08:10 -07001344 * sense, unless it is also flagged as optimistic.
YOSHIFUJI Hideaki6b3ae802005-12-21 22:58:01 +09001345 * - Candidate Source Address (section 4)
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001346 * - In any case, anycast addresses, multicast
1347 * addresses, and the unspecified address MUST
1348 * NOT be included in a candidate set.
1349 */
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001350 if ((score->ifa->flags & IFA_F_TENTATIVE) &&
1351 (!(score->ifa->flags & IFA_F_OPTIMISTIC)))
YOSHIFUJI Hideaki6b3ae802005-12-21 22:58:01 +09001352 continue;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001353
1354 score->addr_type = __ipv6_addr_type(&score->ifa->addr);
1355
1356 if (unlikely(score->addr_type == IPV6_ADDR_ANY ||
1357 score->addr_type & IPV6_ADDR_MULTICAST)) {
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001358 LIMIT_NETDEBUG(KERN_DEBUG
Joe Perches3b6d8212007-11-19 23:47:25 -08001359 "ADDRCONF: unspecified / multicast address "
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001360 "assigned as unicast address on %s",
1361 dev->name);
1362 continue;
1363 }
1364
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001365 score->rule = -1;
1366 bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX);
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001367
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001368 for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) {
1369 int minihiscore, miniscore;
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001370
Benjamin Thery3de23252008-05-28 14:51:24 +02001371 minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i);
1372 miniscore = ipv6_get_saddr_eval(net, score, &dst, i);
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001373
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001374 if (minihiscore > miniscore) {
1375 if (i == IPV6_SADDR_RULE_SCOPE &&
1376 score->scopedist > 0) {
1377 /*
1378 * special case:
1379 * each remaining entry
1380 * has too small (not enough)
1381 * scope, because ifa entries
1382 * are sorted by their scope
1383 * values.
1384 */
1385 goto try_nextdev;
1386 }
1387 break;
1388 } else if (minihiscore < miniscore) {
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001389 if (hiscore->ifa)
1390 in6_ifa_put(hiscore->ifa);
1391
1392 in6_ifa_hold(score->ifa);
1393
Ilpo Järvinena0bffff2009-03-21 13:36:17 -07001394 swap(hiscore, score);
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001395
1396 /* restore our iterator */
1397 score->ifa = hiscore->ifa;
1398
1399 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400 }
1401 }
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001402 }
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001403try_nextdev:
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001404 read_unlock_bh(&idev->lock);
1405 }
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001406 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001408 if (!hiscore->ifa)
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001409 return -EADDRNOTAVAIL;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001410
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +00001411 *saddr = hiscore->ifa->addr;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001412 in6_ifa_put(hiscore->ifa);
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001413 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414}
YOSHIFUJI Hideaki5e5f3f02008-03-03 21:44:34 +09001415EXPORT_SYMBOL(ipv6_dev_get_saddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001416
Amerigo Wang89657792013-06-29 21:30:49 +08001417int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr,
1418 unsigned char banned_flags)
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02001419{
1420 struct inet6_ifaddr *ifp;
1421 int err = -EADDRNOTAVAIL;
1422
1423 list_for_each_entry(ifp, &idev->addr_list, if_list) {
1424 if (ifp->scope == IFA_LINK &&
1425 !(ifp->flags & banned_flags)) {
1426 *addr = ifp->addr;
1427 err = 0;
1428 break;
1429 }
1430 }
1431 return err;
1432}
1433
Neil Horman95c385b2007-04-25 17:08:10 -07001434int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
1435 unsigned char banned_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001436{
1437 struct inet6_dev *idev;
1438 int err = -EADDRNOTAVAIL;
1439
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001440 rcu_read_lock();
Stephen Hemmingere21e8462010-03-20 16:09:01 -07001441 idev = __in6_dev_get(dev);
1442 if (idev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443 read_lock_bh(&idev->lock);
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02001444 err = __ipv6_get_lladdr(idev, addr, banned_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001445 read_unlock_bh(&idev->lock);
1446 }
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001447 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448 return err;
1449}
1450
1451static int ipv6_count_addresses(struct inet6_dev *idev)
1452{
1453 int cnt = 0;
1454 struct inet6_ifaddr *ifp;
1455
1456 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00001457 list_for_each_entry(ifp, &idev->addr_list, if_list)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458 cnt++;
1459 read_unlock_bh(&idev->lock);
1460 return cnt;
1461}
1462
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001463int ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
Florian Westphal2a7851b2013-05-17 03:56:10 +00001464 const struct net_device *dev, int strict)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001465{
Stephen Hemmingereedf0422010-05-17 22:27:12 -07001466 struct inet6_ifaddr *ifp;
Eric Dumazetddbe5032012-07-18 08:11:12 +00001467 unsigned int hash = inet6_addr_hash(addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001468
stephen hemminger5c578ae2010-03-17 20:31:11 +00001469 rcu_read_lock_bh();
Sasha Levinb67bfe02013-02-27 17:06:00 -08001470 hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09001471 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcanobfeade02008-01-10 22:43:18 -08001472 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001473 if (ipv6_addr_equal(&ifp->addr, addr) &&
Stephen Hemmingereedf0422010-05-17 22:27:12 -07001474 !(ifp->flags&IFA_F_TENTATIVE) &&
1475 (dev == NULL || ifp->idev->dev == dev ||
1476 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) {
1477 rcu_read_unlock_bh();
1478 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001479 }
1480 }
stephen hemminger5c578ae2010-03-17 20:31:11 +00001481
Stephen Hemmingereedf0422010-05-17 22:27:12 -07001482 rcu_read_unlock_bh();
1483 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001484}
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +09001485EXPORT_SYMBOL(ipv6_chk_addr);
1486
David S. Miller3e81c6d2010-03-20 16:18:00 -07001487static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
1488 struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001489{
Eric Dumazetddbe5032012-07-18 08:11:12 +00001490 unsigned int hash = inet6_addr_hash(addr);
stephen hemmingerc2e21292010-03-17 20:31:10 +00001491 struct inet6_ifaddr *ifp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001492
Sasha Levinb67bfe02013-02-27 17:06:00 -08001493 hlist_for_each_entry(ifp, &inet6_addr_lst[hash], addr_lst) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09001494 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcano06bfe652008-01-10 22:43:42 -08001495 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001496 if (ipv6_addr_equal(&ifp->addr, addr)) {
1497 if (dev == NULL || ifp->idev->dev == dev)
David S. Miller3e81c6d2010-03-20 16:18:00 -07001498 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001499 }
1500 }
David S. Miller3e81c6d2010-03-20 16:18:00 -07001501 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502}
1503
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001504int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev)
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -04001505{
1506 struct inet6_dev *idev;
1507 struct inet6_ifaddr *ifa;
1508 int onlink;
1509
1510 onlink = 0;
1511 rcu_read_lock();
1512 idev = __in6_dev_get(dev);
1513 if (idev) {
1514 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00001515 list_for_each_entry(ifa, &idev->addr_list, if_list) {
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -04001516 onlink = ipv6_prefix_equal(addr, &ifa->addr,
1517 ifa->prefix_len);
1518 if (onlink)
1519 break;
1520 }
1521 read_unlock_bh(&idev->lock);
1522 }
1523 rcu_read_unlock();
1524 return onlink;
1525}
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -04001526EXPORT_SYMBOL(ipv6_chk_prefix);
1527
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +09001528struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr,
Daniel Lezcano1cab3da2008-01-10 22:44:09 -08001529 struct net_device *dev, int strict)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001530{
David S. Millerb79d1d52010-03-25 21:39:21 -07001531 struct inet6_ifaddr *ifp, *result = NULL;
Eric Dumazetddbe5032012-07-18 08:11:12 +00001532 unsigned int hash = inet6_addr_hash(addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001533
stephen hemminger5c578ae2010-03-17 20:31:11 +00001534 rcu_read_lock_bh();
Sasha Levinb67bfe02013-02-27 17:06:00 -08001535 hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09001536 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcano1cab3da2008-01-10 22:44:09 -08001537 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001538 if (ipv6_addr_equal(&ifp->addr, addr)) {
1539 if (dev == NULL || ifp->idev->dev == dev ||
1540 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
David S. Millerb79d1d52010-03-25 21:39:21 -07001541 result = ifp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001542 in6_ifa_hold(ifp);
1543 break;
1544 }
1545 }
1546 }
stephen hemminger5c578ae2010-03-17 20:31:11 +00001547 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001548
David S. Millerb79d1d52010-03-25 21:39:21 -07001549 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001550}
1551
Linus Torvalds1da177e2005-04-16 15:20:36 -07001552/* Gets referenced address, destroys ifaddr */
1553
Brian Haleycc411d02009-09-09 14:41:32 +00001554static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001555{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001556 if (ifp->flags&IFA_F_PERMANENT) {
1557 spin_lock_bh(&ifp->lock);
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02001558 addrconf_del_dad_timer(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001559 ifp->flags |= IFA_F_TENTATIVE;
Brian Haleycc411d02009-09-09 14:41:32 +00001560 if (dad_failed)
1561 ifp->flags |= IFA_F_DADFAILED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001562 spin_unlock_bh(&ifp->lock);
Herbert Xue2577a02010-03-13 12:23:29 -08001563 if (dad_failed)
1564 ipv6_ifa_notify(0, ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565 in6_ifa_put(ifp);
1566#ifdef CONFIG_IPV6_PRIVACY
1567 } else if (ifp->flags&IFA_F_TEMPORARY) {
1568 struct inet6_ifaddr *ifpub;
1569 spin_lock_bh(&ifp->lock);
1570 ifpub = ifp->ifpub;
1571 if (ifpub) {
1572 in6_ifa_hold(ifpub);
1573 spin_unlock_bh(&ifp->lock);
1574 ipv6_create_tempaddr(ifpub, ifp);
1575 in6_ifa_put(ifpub);
1576 } else {
1577 spin_unlock_bh(&ifp->lock);
1578 }
1579 ipv6_del_addr(ifp);
1580#endif
1581 } else
1582 ipv6_del_addr(ifp);
1583}
1584
Herbert Xuf2344a12010-05-18 15:55:27 -07001585static int addrconf_dad_end(struct inet6_ifaddr *ifp)
1586{
1587 int err = -ENOENT;
1588
1589 spin_lock(&ifp->state_lock);
1590 if (ifp->state == INET6_IFADDR_STATE_DAD) {
1591 ifp->state = INET6_IFADDR_STATE_POSTDAD;
1592 err = 0;
1593 }
1594 spin_unlock(&ifp->state_lock);
1595
1596 return err;
1597}
1598
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09001599void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1600{
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09001601 struct inet6_dev *idev = ifp->idev;
Brian Haley9bdd8d42009-03-18 18:22:48 -07001602
Ursula Braun853dc2e2010-10-24 23:06:43 +00001603 if (addrconf_dad_end(ifp)) {
1604 in6_ifa_put(ifp);
Herbert Xuf2344a12010-05-18 15:55:27 -07001605 return;
Ursula Braun853dc2e2010-10-24 23:06:43 +00001606 }
Herbert Xuf2344a12010-05-18 15:55:27 -07001607
Joe Perchese87cc472012-05-13 21:56:26 +00001608 net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n",
1609 ifp->idev->dev->name, &ifp->addr);
Brian Haley9bdd8d42009-03-18 18:22:48 -07001610
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09001611 if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) {
1612 struct in6_addr addr;
1613
1614 addr.s6_addr32[0] = htonl(0xfe800000);
1615 addr.s6_addr32[1] = 0;
1616
1617 if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) &&
1618 ipv6_addr_equal(&ifp->addr, &addr)) {
1619 /* DAD failed for link-local based on MAC address */
1620 idev->cnf.disable_ipv6 = 1;
Brian Haley9bdd8d42009-03-18 18:22:48 -07001621
Joe Perchesf3213832012-05-15 14:11:53 +00001622 pr_info("%s: IPv6 being disabled!\n",
Brian Haley9bdd8d42009-03-18 18:22:48 -07001623 ifp->idev->dev->name);
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09001624 }
1625 }
1626
Brian Haleycc411d02009-09-09 14:41:32 +00001627 addrconf_dad_stop(ifp, 1);
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09001628}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001629
1630/* Join to solicited addr multicast group. */
1631
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001632void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001633{
1634 struct in6_addr maddr;
1635
1636 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1637 return;
1638
1639 addrconf_addr_solict_mult(addr, &maddr);
1640 ipv6_dev_mc_inc(dev, &maddr);
1641}
1642
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001643void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001644{
1645 struct in6_addr maddr;
1646
1647 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1648 return;
1649
1650 addrconf_addr_solict_mult(addr, &maddr);
1651 __ipv6_dev_mc_dec(idev, &maddr);
1652}
1653
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03001654static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001655{
1656 struct in6_addr addr;
Bjørn Mork2bda8a02011-07-05 23:04:13 +00001657 if (ifp->prefix_len == 127) /* RFC 6164 */
1658 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001659 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1660 if (ipv6_addr_any(&addr))
1661 return;
1662 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1663}
1664
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03001665static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001666{
1667 struct in6_addr addr;
YOSHIFUJI Hideaki32019e62011-07-24 11:44:34 +00001668 if (ifp->prefix_len == 127) /* RFC 6164 */
1669 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001670 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1671 if (ipv6_addr_any(&addr))
1672 return;
1673 __ipv6_dev_ac_dec(ifp->idev, &addr);
1674}
1675
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001676static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1677{
1678 if (dev->addr_len != ETH_ALEN)
1679 return -1;
1680 memcpy(eui, dev->dev_addr, 3);
1681 memcpy(eui + 5, dev->dev_addr + 3, 3);
1682
1683 /*
1684 * The zSeries OSA network cards can be shared among various
1685 * OS instances, but the OSA cards have only one MAC address.
1686 * This leads to duplicate address conflicts in conjunction
1687 * with IPv6 if more than one instance uses the same card.
1688 *
1689 * The driver for these cards can deliver a unique 16-bit
1690 * identifier for each instance sharing the same card. It is
1691 * placed instead of 0xFFFE in the interface identifier. The
1692 * "u" bit of the interface identifier is not inverted in this
1693 * case. Hence the resulting interface identifier has local
1694 * scope according to RFC2373.
1695 */
1696 if (dev->dev_id) {
1697 eui[3] = (dev->dev_id >> 8) & 0xFF;
1698 eui[4] = dev->dev_id & 0xFF;
1699 } else {
1700 eui[3] = 0xFF;
1701 eui[4] = 0xFE;
1702 eui[0] ^= 2;
1703 }
1704 return 0;
1705}
1706
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +00001707static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev)
1708{
1709 if (dev->addr_len != IEEE802154_ADDR_LEN)
1710 return -1;
1711 memcpy(eui, dev->dev_addr, 8);
YOSHIFUJI Hideaki / 吉藤英明5e98a362013-01-28 10:44:29 +00001712 eui[0] ^= 2;
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +00001713 return 0;
1714}
1715
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001716static int addrconf_ifid_ieee1394(u8 *eui, struct net_device *dev)
1717{
1718 union fwnet_hwaddr *ha;
1719
1720 if (dev->addr_len != FWNET_ALEN)
1721 return -1;
1722
1723 ha = (union fwnet_hwaddr *)dev->dev_addr;
1724
1725 memcpy(eui, &ha->uc.uniq_id, sizeof(ha->uc.uniq_id));
1726 eui[0] ^= 2;
1727 return 0;
1728}
1729
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001730static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1731{
1732 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1733 if (dev->addr_len != ARCNET_ALEN)
1734 return -1;
1735 memset(eui, 0, 7);
Eldad Zack8e5e8f32012-04-01 07:49:08 +00001736 eui[7] = *(u8 *)dev->dev_addr;
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001737 return 0;
1738}
1739
1740static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1741{
1742 if (dev->addr_len != INFINIBAND_ALEN)
1743 return -1;
1744 memcpy(eui, dev->dev_addr + 12, 8);
1745 eui[0] |= 2;
1746 return 0;
1747}
1748
stephen hemmingerc61393e2010-10-04 20:17:53 +00001749static int __ipv6_isatap_ifid(u8 *eui, __be32 addr)
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09001750{
Sascha Hlusiak9af28512009-05-19 12:56:51 +00001751 if (addr == 0)
1752 return -1;
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09001753 eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
1754 ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
1755 ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
1756 ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
1757 ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
1758 ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
1759 eui[1] = 0;
1760 eui[2] = 0x5E;
1761 eui[3] = 0xFE;
1762 memcpy(eui + 4, &addr, 4);
1763 return 0;
1764}
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09001765
1766static int addrconf_ifid_sit(u8 *eui, struct net_device *dev)
1767{
1768 if (dev->priv_flags & IFF_ISATAP)
1769 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
1770 return -1;
1771}
1772
stephen hemmingeraee80b52011-06-08 10:44:30 +00001773static int addrconf_ifid_gre(u8 *eui, struct net_device *dev)
1774{
1775 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
1776}
1777
Nicolas Dichtele8377352013-08-20 12:16:06 +02001778static int addrconf_ifid_ip6tnl(u8 *eui, struct net_device *dev)
1779{
1780 memcpy(eui, dev->perm_addr, 3);
1781 memcpy(eui + 5, dev->perm_addr + 3, 3);
1782 eui[3] = 0xFF;
1783 eui[4] = 0xFE;
1784 eui[0] ^= 2;
1785 return 0;
1786}
1787
Linus Torvalds1da177e2005-04-16 15:20:36 -07001788static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1789{
1790 switch (dev->type) {
1791 case ARPHRD_ETHER:
1792 case ARPHRD_FDDI:
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001793 return addrconf_ifid_eui48(eui, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001794 case ARPHRD_ARCNET:
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001795 return addrconf_ifid_arcnet(eui, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001796 case ARPHRD_INFINIBAND:
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001797 return addrconf_ifid_infiniband(eui, dev);
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11001798 case ARPHRD_SIT:
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09001799 return addrconf_ifid_sit(eui, dev);
stephen hemmingeraee80b52011-06-08 10:44:30 +00001800 case ARPHRD_IPGRE:
1801 return addrconf_ifid_gre(eui, dev);
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +00001802 case ARPHRD_IEEE802154:
1803 return addrconf_ifid_eui64(eui, dev);
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001804 case ARPHRD_IEEE1394:
1805 return addrconf_ifid_ieee1394(eui, dev);
Nicolas Dichtele8377352013-08-20 12:16:06 +02001806 case ARPHRD_TUNNEL6:
1807 return addrconf_ifid_ip6tnl(eui, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001808 }
1809 return -1;
1810}
1811
1812static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1813{
1814 int err = -1;
1815 struct inet6_ifaddr *ifp;
1816
1817 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00001818 list_for_each_entry(ifp, &idev->addr_list, if_list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001819 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1820 memcpy(eui, ifp->addr.s6_addr+8, 8);
1821 err = 0;
1822 break;
1823 }
1824 }
1825 read_unlock_bh(&idev->lock);
1826 return err;
1827}
1828
1829#ifdef CONFIG_IPV6_PRIVACY
1830/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00001831static void __ipv6_regen_rndid(struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001832{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001833regen:
YOSHIFUJI Hideaki955189e2006-03-20 16:54:09 -08001834 get_random_bytes(idev->rndid, sizeof(idev->rndid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001835 idev->rndid[0] &= ~0x02;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001836
1837 /*
1838 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1839 * check if generated address is not inappropriate
1840 *
1841 * - Reserved subnet anycast (RFC 2526)
1842 * 11111101 11....11 1xxxxxxx
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11001843 * - ISATAP (RFC4214) 6.1
Linus Torvalds1da177e2005-04-16 15:20:36 -07001844 * 00-00-5E-FE-xx-xx-xx-xx
1845 * - value 0
1846 * - XXX: already assigned to an address on the device
1847 */
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001848 if (idev->rndid[0] == 0xfd &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07001849 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1850 (idev->rndid[7]&0x80))
1851 goto regen;
1852 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1853 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1854 goto regen;
1855 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1856 goto regen;
1857 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001858}
1859
1860static void ipv6_regen_rndid(unsigned long data)
1861{
1862 struct inet6_dev *idev = (struct inet6_dev *) data;
1863 unsigned long expires;
1864
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001865 rcu_read_lock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001866 write_lock_bh(&idev->lock);
1867
1868 if (idev->dead)
1869 goto out;
1870
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00001871 __ipv6_regen_rndid(idev);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001872
Linus Torvalds1da177e2005-04-16 15:20:36 -07001873 expires = jiffies +
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001874 idev->cnf.temp_prefered_lft * HZ -
Ben Hutchings784e2712010-06-26 11:42:55 +00001875 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time -
1876 idev->cnf.max_desync_factor * HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001877 if (time_before(expires, jiffies)) {
Joe Perchesf3213832012-05-15 14:11:53 +00001878 pr_warn("%s: too short regeneration interval; timer disabled for %s\n",
1879 __func__, idev->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001880 goto out;
1881 }
1882
1883 if (!mod_timer(&idev->regen_timer, expires))
1884 in6_dev_hold(idev);
1885
1886out:
1887 write_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001888 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001889 in6_dev_put(idev);
1890}
1891
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00001892static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr)
Eldad Zack8e5e8f32012-04-01 07:49:08 +00001893{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001894 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00001895 __ipv6_regen_rndid(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001896}
1897#endif
1898
1899/*
1900 * Add prefix route.
1901 */
1902
1903static void
1904addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
Jamal Hadi Salime431b8c2005-06-18 22:55:31 -07001905 unsigned long expires, u32 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001906{
Thomas Graf86872cb2006-08-22 00:01:08 -07001907 struct fib6_config cfg = {
1908 .fc_table = RT6_TABLE_PREFIX,
1909 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1910 .fc_ifindex = dev->ifindex,
1911 .fc_expires = expires,
1912 .fc_dst_len = plen,
1913 .fc_flags = RTF_UP | flags,
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001914 .fc_nlinfo.nl_net = dev_net(dev),
Stephen Hemmingerf410a1f2008-08-23 05:16:46 -07001915 .fc_protocol = RTPROT_KERNEL,
Thomas Graf86872cb2006-08-22 00:01:08 -07001916 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001917
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +00001918 cfg.fc_dst = *pfx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001919
1920 /* Prevent useless cloning on PtP SIT.
1921 This thing is done here expecting that the whole
1922 class of non-broadcast devices need not cloning.
1923 */
Amerigo Wang07a93622012-10-29 16:23:10 +00001924#if IS_ENABLED(CONFIG_IPV6_SIT)
Thomas Graf86872cb2006-08-22 00:01:08 -07001925 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1926 cfg.fc_flags |= RTF_NONEXTHOP;
Joerg Roedel0be669b2006-10-10 14:49:53 -07001927#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001928
Thomas Graf86872cb2006-08-22 00:01:08 -07001929 ip6_route_add(&cfg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001930}
1931
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00001932
1933static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx,
1934 int plen,
1935 const struct net_device *dev,
1936 u32 flags, u32 noflags)
1937{
1938 struct fib6_node *fn;
1939 struct rt6_info *rt = NULL;
1940 struct fib6_table *table;
1941
1942 table = fib6_get_table(dev_net(dev), RT6_TABLE_PREFIX);
1943 if (table == NULL)
1944 return NULL;
1945
Li RongQing5744dd92012-09-11 21:59:01 +00001946 read_lock_bh(&table->tb6_lock);
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00001947 fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0);
1948 if (!fn)
1949 goto out;
1950 for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) {
David S. Millerd1918542011-12-28 20:19:20 -05001951 if (rt->dst.dev->ifindex != dev->ifindex)
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00001952 continue;
1953 if ((rt->rt6i_flags & flags) != flags)
1954 continue;
Romain Kuntz85da53b2013-01-09 15:02:26 +01001955 if ((rt->rt6i_flags & noflags) != 0)
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00001956 continue;
1957 dst_hold(&rt->dst);
1958 break;
1959 }
1960out:
Li RongQing5744dd92012-09-11 21:59:01 +00001961 read_unlock_bh(&table->tb6_lock);
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00001962 return rt;
1963}
1964
1965
Linus Torvalds1da177e2005-04-16 15:20:36 -07001966/* Create "default" multicast route to the interface */
1967
1968static void addrconf_add_mroute(struct net_device *dev)
1969{
Thomas Graf86872cb2006-08-22 00:01:08 -07001970 struct fib6_config cfg = {
1971 .fc_table = RT6_TABLE_LOCAL,
1972 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1973 .fc_ifindex = dev->ifindex,
1974 .fc_dst_len = 8,
1975 .fc_flags = RTF_UP,
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001976 .fc_nlinfo.nl_net = dev_net(dev),
Thomas Graf86872cb2006-08-22 00:01:08 -07001977 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001978
Thomas Graf86872cb2006-08-22 00:01:08 -07001979 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1980
1981 ip6_route_add(&cfg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001982}
1983
Amerigo Wang07a93622012-10-29 16:23:10 +00001984#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001985static void sit_route_add(struct net_device *dev)
1986{
Thomas Graf86872cb2006-08-22 00:01:08 -07001987 struct fib6_config cfg = {
1988 .fc_table = RT6_TABLE_MAIN,
1989 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1990 .fc_ifindex = dev->ifindex,
1991 .fc_dst_len = 96,
1992 .fc_flags = RTF_UP | RTF_NONEXTHOP,
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001993 .fc_nlinfo.nl_net = dev_net(dev),
Thomas Graf86872cb2006-08-22 00:01:08 -07001994 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001995
1996 /* prefix length - 96 bits "::d.d.d.d" */
Thomas Graf86872cb2006-08-22 00:01:08 -07001997 ip6_route_add(&cfg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001998}
Joerg Roedel0be669b2006-10-10 14:49:53 -07001999#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002000
Linus Torvalds1da177e2005-04-16 15:20:36 -07002001static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
2002{
2003 struct inet6_dev *idev;
2004
2005 ASSERT_RTNL();
2006
Stephen Hemmingere21e8462010-03-20 16:09:01 -07002007 idev = ipv6_find_idev(dev);
2008 if (!idev)
Brian Haley64e724f2010-07-20 10:34:30 +00002009 return ERR_PTR(-ENOBUFS);
2010
2011 if (idev->cnf.disable_ipv6)
2012 return ERR_PTR(-EACCES);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002013
2014 /* Add default multicast route */
Li Wei4af04ab2011-12-06 21:23:45 +00002015 if (!(dev->flags & IFF_LOOPBACK))
2016 addrconf_add_mroute(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002017
Linus Torvalds1da177e2005-04-16 15:20:36 -07002018 return idev;
2019}
2020
Neil Hormane6bff992012-01-04 10:49:15 +00002021void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002022{
2023 struct prefix_info *pinfo;
2024 __u32 valid_lft;
2025 __u32 prefered_lft;
2026 int addr_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002027 struct inet6_dev *in6_dev;
Brian Haley56d417b2009-06-01 03:07:33 -07002028 struct net *net = dev_net(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002029
2030 pinfo = (struct prefix_info *) opt;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002031
Linus Torvalds1da177e2005-04-16 15:20:36 -07002032 if (len < sizeof(struct prefix_info)) {
dingtianhongba3542e2013-08-17 10:27:04 +08002033 ADBG("addrconf: prefix option too short\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002034 return;
2035 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002036
Linus Torvalds1da177e2005-04-16 15:20:36 -07002037 /*
2038 * Validation checks ([ADDRCONF], page 19)
2039 */
2040
2041 addr_type = ipv6_addr_type(&pinfo->prefix);
2042
2043 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
2044 return;
2045
2046 valid_lft = ntohl(pinfo->valid);
2047 prefered_lft = ntohl(pinfo->prefered);
2048
2049 if (prefered_lft > valid_lft) {
Joe Perchese87cc472012-05-13 21:56:26 +00002050 net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002051 return;
2052 }
2053
2054 in6_dev = in6_dev_get(dev);
2055
2056 if (in6_dev == NULL) {
Joe Perchese87cc472012-05-13 21:56:26 +00002057 net_dbg_ratelimited("addrconf: device %s not configured\n",
2058 dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002059 return;
2060 }
2061
2062 /*
2063 * Two things going on here:
2064 * 1) Add routes for on-link prefixes
2065 * 2) Configure prefixes with the auto flag set
2066 */
2067
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002068 if (pinfo->onlink) {
2069 struct rt6_info *rt;
2070 unsigned long rt_expires;
2071
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002072 /* Avoid arithmetic overflow. Really, we could
2073 * save rt_expires in seconds, likely valid_lft,
2074 * but it would require division in fib gc, that it
2075 * not good.
2076 */
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002077 if (HZ > USER_HZ)
2078 rt_expires = addrconf_timeout_fixup(valid_lft, HZ);
2079 else
2080 rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ);
YOSHIFUJI Hideaki3dd4bc62005-12-19 14:02:45 -08002081
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002082 if (addrconf_finite_timeout(rt_expires))
2083 rt_expires *= HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002084
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002085 rt = addrconf_get_prefix_route(&pinfo->prefix,
2086 pinfo->prefix_len,
2087 dev,
2088 RTF_ADDRCONF | RTF_PREFIX_RT,
2089 RTF_GATEWAY | RTF_DEFAULT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002090
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002091 if (rt) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002092 /* Autoconf prefix route */
2093 if (valid_lft == 0) {
2094 ip6_del_rt(rt);
2095 rt = NULL;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002096 } else if (addrconf_finite_timeout(rt_expires)) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002097 /* not infinity */
Gao feng1716a962012-04-06 00:13:10 +00002098 rt6_set_expires(rt, jiffies + rt_expires);
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002099 } else {
Gao feng1716a962012-04-06 00:13:10 +00002100 rt6_clean_expires(rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002101 }
2102 } else if (valid_lft) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002103 clock_t expires = 0;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002104 int flags = RTF_ADDRCONF | RTF_PREFIX_RT;
2105 if (addrconf_finite_timeout(rt_expires)) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002106 /* not infinity */
2107 flags |= RTF_EXPIRES;
2108 expires = jiffies_to_clock_t(rt_expires);
2109 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002110 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002111 dev, expires, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002112 }
Amerigo Wang94e187c2012-10-29 00:13:19 +00002113 ip6_rt_put(rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002114 }
2115
2116 /* Try to figure out our local address for this prefix */
2117
2118 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002119 struct inet6_ifaddr *ifp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002120 struct in6_addr addr;
2121 int create = 0, update_lft = 0;
Daniel Borkmann617fe292013-04-09 03:47:16 +00002122 bool tokenized = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002123
2124 if (pinfo->prefix_len == 64) {
2125 memcpy(&addr, &pinfo->prefix, 8);
Daniel Borkmannf53adae2013-04-08 04:01:30 +00002126
2127 if (!ipv6_addr_any(&in6_dev->token)) {
2128 read_lock_bh(&in6_dev->lock);
2129 memcpy(addr.s6_addr + 8,
2130 in6_dev->token.s6_addr + 8, 8);
2131 read_unlock_bh(&in6_dev->lock);
Daniel Borkmann617fe292013-04-09 03:47:16 +00002132 tokenized = true;
Daniel Borkmannf53adae2013-04-08 04:01:30 +00002133 } else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
2134 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002135 in6_dev_put(in6_dev);
2136 return;
2137 }
2138 goto ok;
2139 }
Joe Perchese87cc472012-05-13 21:56:26 +00002140 net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n",
2141 pinfo->prefix_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002142 in6_dev_put(in6_dev);
2143 return;
2144
2145ok:
2146
YOSHIFUJI Hideaki53b79972008-07-19 22:35:03 -07002147 ifp = ipv6_get_ifaddr(net, &addr, dev, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002148
2149 if (ifp == NULL && valid_lft) {
2150 int max_addresses = in6_dev->cnf.max_addresses;
Neil Horman95c385b2007-04-25 17:08:10 -07002151 u32 addr_flags = 0;
2152
2153#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2154 if (in6_dev->cnf.optimistic_dad &&
Neil Hormane6bff992012-01-04 10:49:15 +00002155 !net->ipv6.devconf_all->forwarding && sllao)
Neil Horman95c385b2007-04-25 17:08:10 -07002156 addr_flags = IFA_F_OPTIMISTIC;
2157#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002158
2159 /* Do not allow to create too much of autoconfigured
2160 * addresses; this would be too easy way to crash kernel.
2161 */
2162 if (!max_addresses ||
2163 ipv6_count_addresses(in6_dev) < max_addresses)
Jiri Pirko3f8f5292013-08-01 10:41:27 +02002164 ifp = ipv6_add_addr(in6_dev, &addr, NULL,
2165 pinfo->prefix_len,
Neil Horman95c385b2007-04-25 17:08:10 -07002166 addr_type&IPV6_ADDR_SCOPE_MASK,
Jiri Benc8a226b22013-08-01 10:41:28 +02002167 addr_flags, valid_lft,
2168 prefered_lft);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002169
YOSHIFUJI Hideaki / 吉藤英明3f0d2ba2013-01-22 06:32:54 +00002170 if (IS_ERR_OR_NULL(ifp)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002171 in6_dev_put(in6_dev);
2172 return;
2173 }
2174
Jiri Benc8a226b22013-08-01 10:41:28 +02002175 update_lft = 0;
2176 create = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002177 ifp->cstamp = jiffies;
Daniel Borkmann617fe292013-04-09 03:47:16 +00002178 ifp->tokenized = tokenized;
David S. Millercf22f9a2012-04-14 21:37:40 -04002179 addrconf_dad_start(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002180 }
2181
2182 if (ifp) {
2183 int flags;
2184 unsigned long now;
2185#ifdef CONFIG_IPV6_PRIVACY
2186 struct inet6_ifaddr *ift;
2187#endif
2188 u32 stored_lft;
2189
2190 /* update lifetime (RFC2462 5.5.3 e) */
2191 spin_lock(&ifp->lock);
2192 now = jiffies;
2193 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
2194 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
2195 else
2196 stored_lft = 0;
Jiri Benc8a226b22013-08-01 10:41:28 +02002197 if (!update_lft && !create && stored_lft) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002198 if (valid_lft > MIN_VALID_LIFETIME ||
2199 valid_lft > stored_lft)
2200 update_lft = 1;
2201 else if (stored_lft <= MIN_VALID_LIFETIME) {
2202 /* valid_lft <= stored_lft is always true */
Brian Haleya1ed0522009-07-02 07:10:52 +00002203 /*
2204 * RFC 4862 Section 5.5.3e:
2205 * "Note that the preferred lifetime of
2206 * the corresponding address is always
2207 * reset to the Preferred Lifetime in
2208 * the received Prefix Information
2209 * option, regardless of whether the
2210 * valid lifetime is also reset or
2211 * ignored."
2212 *
2213 * So if the preferred lifetime in
2214 * this advertisement is different
2215 * than what we have stored, but the
2216 * valid lifetime is invalid, just
2217 * reset prefered_lft.
2218 *
2219 * We must set the valid lifetime
2220 * to the stored lifetime since we'll
2221 * be updating the timestamp below,
2222 * else we'll set it back to the
Lucas De Marchi25985ed2011-03-30 22:57:33 -03002223 * minimum.
Brian Haleya1ed0522009-07-02 07:10:52 +00002224 */
2225 if (prefered_lft != ifp->prefered_lft) {
2226 valid_lft = stored_lft;
2227 update_lft = 1;
2228 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002229 } else {
2230 valid_lft = MIN_VALID_LIFETIME;
2231 if (valid_lft < prefered_lft)
2232 prefered_lft = valid_lft;
2233 update_lft = 1;
2234 }
2235 }
2236
2237 if (update_lft) {
2238 ifp->valid_lft = valid_lft;
2239 ifp->prefered_lft = prefered_lft;
2240 ifp->tstamp = now;
2241 flags = ifp->flags;
2242 ifp->flags &= ~IFA_F_DEPRECATED;
2243 spin_unlock(&ifp->lock);
2244
2245 if (!(flags&IFA_F_TENTATIVE))
2246 ipv6_ifa_notify(0, ifp);
2247 } else
2248 spin_unlock(&ifp->lock);
2249
2250#ifdef CONFIG_IPV6_PRIVACY
2251 read_lock_bh(&in6_dev->lock);
2252 /* update all temporary addresses in the list */
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00002253 list_for_each_entry(ift, &in6_dev->tempaddr_list,
2254 tmp_list) {
2255 int age, max_valid, max_prefered;
2256
Benoit Boissinotc6fbfac2008-04-02 00:00:58 -07002257 if (ifp != ift->ifpub)
2258 continue;
2259
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00002260 /*
2261 * RFC 4941 section 3.3:
2262 * If a received option will extend the lifetime
2263 * of a public address, the lifetimes of
2264 * temporary addresses should be extended,
2265 * subject to the overall constraint that no
2266 * temporary addresses should ever remain
2267 * "valid" or "preferred" for a time longer than
2268 * (TEMP_VALID_LIFETIME) or
2269 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR),
2270 * respectively.
2271 */
2272 age = (now - ift->cstamp) / HZ;
2273 max_valid = in6_dev->cnf.temp_valid_lft - age;
2274 if (max_valid < 0)
2275 max_valid = 0;
2276
2277 max_prefered = in6_dev->cnf.temp_prefered_lft -
2278 in6_dev->cnf.max_desync_factor -
2279 age;
2280 if (max_prefered < 0)
2281 max_prefered = 0;
2282
2283 if (valid_lft > max_valid)
2284 valid_lft = max_valid;
2285
2286 if (prefered_lft > max_prefered)
2287 prefered_lft = max_prefered;
2288
Linus Torvalds1da177e2005-04-16 15:20:36 -07002289 spin_lock(&ift->lock);
2290 flags = ift->flags;
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00002291 ift->valid_lft = valid_lft;
2292 ift->prefered_lft = prefered_lft;
2293 ift->tstamp = now;
2294 if (prefered_lft > 0)
2295 ift->flags &= ~IFA_F_DEPRECATED;
2296
Linus Torvalds1da177e2005-04-16 15:20:36 -07002297 spin_unlock(&ift->lock);
2298 if (!(flags&IFA_F_TENTATIVE))
2299 ipv6_ifa_notify(0, ift);
2300 }
2301
Glenn Wursteraed65502010-09-27 07:04:30 +00002302 if ((create || list_empty(&in6_dev->tempaddr_list)) && in6_dev->cnf.use_tempaddr > 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002303 /*
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00002304 * When a new public address is created as
2305 * described in [ADDRCONF], also create a new
2306 * temporary address. Also create a temporary
2307 * address if it's enabled but no temporary
2308 * address currently exists.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002309 */
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002310 read_unlock_bh(&in6_dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002311 ipv6_create_tempaddr(ifp, NULL);
2312 } else {
2313 read_unlock_bh(&in6_dev->lock);
2314 }
2315#endif
2316 in6_ifa_put(ifp);
2317 addrconf_verify(0);
2318 }
2319 }
2320 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
2321 in6_dev_put(in6_dev);
2322}
2323
2324/*
2325 * Set destination address.
2326 * Special case for SIT interfaces where we create a new "virtual"
2327 * device.
2328 */
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002329int addrconf_set_dstaddr(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002330{
2331 struct in6_ifreq ireq;
2332 struct net_device *dev;
2333 int err = -EINVAL;
2334
2335 rtnl_lock();
2336
2337 err = -EFAULT;
2338 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2339 goto err_exit;
2340
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002341 dev = __dev_get_by_index(net, ireq.ifr6_ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002342
2343 err = -ENODEV;
2344 if (dev == NULL)
2345 goto err_exit;
2346
Amerigo Wang07a93622012-10-29 16:23:10 +00002347#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002348 if (dev->type == ARPHRD_SIT) {
Stephen Hemminger5bc3eb72008-11-19 21:52:05 -08002349 const struct net_device_ops *ops = dev->netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002350 struct ifreq ifr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002351 struct ip_tunnel_parm p;
2352
2353 err = -EADDRNOTAVAIL;
2354 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
2355 goto err_exit;
2356
2357 memset(&p, 0, sizeof(p));
2358 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
2359 p.iph.saddr = 0;
2360 p.iph.version = 4;
2361 p.iph.ihl = 5;
2362 p.iph.protocol = IPPROTO_IPV6;
2363 p.iph.ttl = 64;
Stephen Hemmingerd20b3102008-01-21 00:48:43 -08002364 ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002365
Stephen Hemminger5bc3eb72008-11-19 21:52:05 -08002366 if (ops->ndo_do_ioctl) {
2367 mm_segment_t oldfs = get_fs();
2368
2369 set_fs(KERNEL_DS);
2370 err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL);
2371 set_fs(oldfs);
2372 } else
2373 err = -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002374
2375 if (err == 0) {
2376 err = -ENOBUFS;
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002377 dev = __dev_get_by_name(net, p.name);
2378 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002379 goto err_exit;
2380 err = dev_open(dev);
2381 }
2382 }
Joerg Roedel0be669b2006-10-10 14:49:53 -07002383#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002384
2385err_exit:
2386 rtnl_unlock();
2387 return err;
2388}
2389
2390/*
2391 * Manual configuration of address on an interface
2392 */
Eric Dumazetb71d1d42011-04-22 04:53:02 +00002393static int inet6_addr_add(struct net *net, int ifindex, const struct in6_addr *pfx,
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00002394 const struct in6_addr *peer_pfx,
Thomas Graf24ef0da2008-05-28 16:54:22 +02002395 unsigned int plen, __u8 ifa_flags, __u32 prefered_lft,
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002396 __u32 valid_lft)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002397{
2398 struct inet6_ifaddr *ifp;
2399 struct inet6_dev *idev;
2400 struct net_device *dev;
2401 int scope;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002402 u32 flags;
2403 clock_t expires;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002404 unsigned long timeout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002405
2406 ASSERT_RTNL();
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002407
Thomas Graf24ef0da2008-05-28 16:54:22 +02002408 if (plen > 128)
2409 return -EINVAL;
2410
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002411 /* check the lifetime */
2412 if (!valid_lft || prefered_lft > valid_lft)
2413 return -EINVAL;
2414
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002415 dev = __dev_get_by_index(net, ifindex);
2416 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002417 return -ENODEV;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002418
Brian Haley64e724f2010-07-20 10:34:30 +00002419 idev = addrconf_add_dev(dev);
2420 if (IS_ERR(idev))
2421 return PTR_ERR(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002422
2423 scope = ipv6_addr_scope(pfx);
2424
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002425 timeout = addrconf_timeout_fixup(valid_lft, HZ);
2426 if (addrconf_finite_timeout(timeout)) {
2427 expires = jiffies_to_clock_t(timeout * HZ);
2428 valid_lft = timeout;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002429 flags = RTF_EXPIRES;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002430 } else {
2431 expires = 0;
2432 flags = 0;
2433 ifa_flags |= IFA_F_PERMANENT;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002434 }
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002435
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002436 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
2437 if (addrconf_finite_timeout(timeout)) {
2438 if (timeout == 0)
2439 ifa_flags |= IFA_F_DEPRECATED;
2440 prefered_lft = timeout;
2441 }
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002442
Jiri Benc8a226b22013-08-01 10:41:28 +02002443 ifp = ipv6_add_addr(idev, pfx, peer_pfx, plen, scope, ifa_flags,
2444 valid_lft, prefered_lft);
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002445
Linus Torvalds1da177e2005-04-16 15:20:36 -07002446 if (!IS_ERR(ifp)) {
YOSHIFUJI Hideaki46d48042007-02-07 20:36:26 +09002447 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002448 expires, flags);
Neil Horman95c385b2007-04-25 17:08:10 -07002449 /*
2450 * Note that section 3.1 of RFC 4429 indicates
2451 * that the Optimistic flag should not be set for
2452 * manually configured addresses
2453 */
David S. Millercf22f9a2012-04-14 21:37:40 -04002454 addrconf_dad_start(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002455 in6_ifa_put(ifp);
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002456 addrconf_verify(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002457 return 0;
2458 }
2459
2460 return PTR_ERR(ifp);
2461}
2462
Eric Dumazetb71d1d42011-04-22 04:53:02 +00002463static int inet6_addr_del(struct net *net, int ifindex, const struct in6_addr *pfx,
Thomas Graf24ef0da2008-05-28 16:54:22 +02002464 unsigned int plen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002465{
2466 struct inet6_ifaddr *ifp;
2467 struct inet6_dev *idev;
2468 struct net_device *dev;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002469
Thomas Graf24ef0da2008-05-28 16:54:22 +02002470 if (plen > 128)
2471 return -EINVAL;
2472
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002473 dev = __dev_get_by_index(net, ifindex);
2474 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002475 return -ENODEV;
2476
David S. Miller7eaa48a2013-08-20 23:44:39 -07002477 if ((idev = __in6_dev_get(dev)) == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002478 return -ENXIO;
2479
2480 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00002481 list_for_each_entry(ifp, &idev->addr_list, if_list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002482 if (ifp->prefix_len == plen &&
2483 ipv6_addr_equal(pfx, &ifp->addr)) {
2484 in6_ifa_hold(ifp);
2485 read_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002486
Linus Torvalds1da177e2005-04-16 15:20:36 -07002487 ipv6_del_addr(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002488 return 0;
2489 }
2490 }
2491 read_unlock_bh(&idev->lock);
2492 return -EADDRNOTAVAIL;
2493}
2494
2495
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002496int addrconf_add_ifaddr(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002497{
2498 struct in6_ifreq ireq;
2499 int err;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002500
Eric W. Biedermanaf31f412012-11-16 03:03:06 +00002501 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002502 return -EPERM;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002503
Linus Torvalds1da177e2005-04-16 15:20:36 -07002504 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2505 return -EFAULT;
2506
2507 rtnl_lock();
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00002508 err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, NULL,
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002509 ireq.ifr6_prefixlen, IFA_F_PERMANENT,
2510 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002511 rtnl_unlock();
2512 return err;
2513}
2514
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002515int addrconf_del_ifaddr(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002516{
2517 struct in6_ifreq ireq;
2518 int err;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002519
Eric W. Biedermanaf31f412012-11-16 03:03:06 +00002520 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002521 return -EPERM;
2522
2523 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2524 return -EFAULT;
2525
2526 rtnl_lock();
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002527 err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2528 ireq.ifr6_prefixlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002529 rtnl_unlock();
2530 return err;
2531}
2532
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002533static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
2534 int plen, int scope)
2535{
2536 struct inet6_ifaddr *ifp;
2537
Jiri Benc8a226b22013-08-01 10:41:28 +02002538 ifp = ipv6_add_addr(idev, addr, NULL, plen,
2539 scope, IFA_F_PERMANENT, 0, 0);
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002540 if (!IS_ERR(ifp)) {
2541 spin_lock_bh(&ifp->lock);
2542 ifp->flags &= ~IFA_F_TENTATIVE;
2543 spin_unlock_bh(&ifp->lock);
2544 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2545 in6_ifa_put(ifp);
2546 }
2547}
2548
Amerigo Wang07a93622012-10-29 16:23:10 +00002549#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002550static void sit_add_v4_addrs(struct inet6_dev *idev)
2551{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002552 struct in6_addr addr;
2553 struct net_device *dev;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09002554 struct net *net = dev_net(idev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002555 int scope;
2556
2557 ASSERT_RTNL();
2558
2559 memset(&addr, 0, sizeof(struct in6_addr));
2560 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2561
2562 if (idev->dev->flags&IFF_POINTOPOINT) {
2563 addr.s6_addr32[0] = htonl(0xfe800000);
2564 scope = IFA_LINK;
2565 } else {
2566 scope = IPV6_ADDR_COMPATv4;
2567 }
2568
2569 if (addr.s6_addr32[3]) {
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002570 add_addr(idev, &addr, 128, scope);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002571 return;
2572 }
2573
Benjamin Thery6fda7352008-03-05 10:47:47 -08002574 for_each_netdev(net, dev) {
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002575 struct in_device *in_dev = __in_dev_get_rtnl(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002576 if (in_dev && (dev->flags & IFF_UP)) {
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002577 struct in_ifaddr *ifa;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002578
2579 int flag = scope;
2580
2581 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2582 int plen;
2583
2584 addr.s6_addr32[3] = ifa->ifa_local;
2585
2586 if (ifa->ifa_scope == RT_SCOPE_LINK)
2587 continue;
2588 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2589 if (idev->dev->flags&IFF_POINTOPOINT)
2590 continue;
2591 flag |= IFA_HOST;
2592 }
2593 if (idev->dev->flags&IFF_POINTOPOINT)
2594 plen = 64;
2595 else
2596 plen = 96;
2597
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002598 add_addr(idev, &addr, plen, flag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002599 }
2600 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002601 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002602}
Joerg Roedel0be669b2006-10-10 14:49:53 -07002603#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002604
2605static void init_loopback(struct net_device *dev)
2606{
2607 struct inet6_dev *idev;
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05302608 struct net_device *sp_dev;
2609 struct inet6_ifaddr *sp_ifa;
2610 struct rt6_info *sp_rt;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002611
2612 /* ::1 */
2613
2614 ASSERT_RTNL();
2615
David S. Miller7eaa48a2013-08-20 23:44:39 -07002616 if ((idev = ipv6_find_idev(dev)) == NULL) {
Joe Perches91df42b2012-05-15 14:11:54 +00002617 pr_debug("%s: add_dev failed\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002618 return;
2619 }
2620
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002621 add_addr(idev, &in6addr_loopback, 128, IFA_HOST);
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05302622
2623 /* Add routes to other interface's IPv6 addresses */
2624 for_each_netdev(dev_net(dev), sp_dev) {
2625 if (!strcmp(sp_dev->name, dev->name))
2626 continue;
2627
2628 idev = __in6_dev_get(sp_dev);
2629 if (!idev)
2630 continue;
2631
2632 read_lock_bh(&idev->lock);
2633 list_for_each_entry(sp_ifa, &idev->addr_list, if_list) {
2634
2635 if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE))
2636 continue;
2637
Gao fenga881ae12013-06-16 11:14:30 +08002638 if (sp_ifa->rt)
2639 continue;
2640
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05302641 sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, 0);
2642
2643 /* Failure cases are ignored */
Gao feng534c8772013-06-02 22:16:21 +00002644 if (!IS_ERR(sp_rt)) {
2645 sp_ifa->rt = sp_rt;
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05302646 ip6_ins_rt(sp_rt);
Gao feng534c8772013-06-02 22:16:21 +00002647 }
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05302648 }
2649 read_unlock_bh(&idev->lock);
2650 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002651}
2652
Eric Dumazetb71d1d42011-04-22 04:53:02 +00002653static void addrconf_add_linklocal(struct inet6_dev *idev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002654{
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002655 struct inet6_ifaddr *ifp;
Neil Horman95c385b2007-04-25 17:08:10 -07002656 u32 addr_flags = IFA_F_PERMANENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002657
Neil Horman95c385b2007-04-25 17:08:10 -07002658#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2659 if (idev->cnf.optimistic_dad &&
David Miller702beb82008-07-20 18:17:02 -07002660 !dev_net(idev->dev)->ipv6.devconf_all->forwarding)
Neil Horman95c385b2007-04-25 17:08:10 -07002661 addr_flags |= IFA_F_OPTIMISTIC;
2662#endif
2663
2664
Jiri Benc8a226b22013-08-01 10:41:28 +02002665 ifp = ipv6_add_addr(idev, addr, NULL, 64, IFA_LINK, addr_flags, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002666 if (!IS_ERR(ifp)) {
YOSHIFUJI Hideaki46d48042007-02-07 20:36:26 +09002667 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
David S. Millercf22f9a2012-04-14 21:37:40 -04002668 addrconf_dad_start(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002669 in6_ifa_put(ifp);
2670 }
2671}
2672
2673static void addrconf_dev_config(struct net_device *dev)
2674{
2675 struct in6_addr addr;
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002676 struct inet6_dev *idev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002677
2678 ASSERT_RTNL();
2679
Herbert Xu74235a22007-06-14 13:02:55 -07002680 if ((dev->type != ARPHRD_ETHER) &&
2681 (dev->type != ARPHRD_FDDI) &&
Herbert Xu74235a22007-06-14 13:02:55 -07002682 (dev->type != ARPHRD_ARCNET) &&
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +00002683 (dev->type != ARPHRD_INFINIBAND) &&
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00002684 (dev->type != ARPHRD_IEEE802154) &&
Nicolas Dichtele8377352013-08-20 12:16:06 +02002685 (dev->type != ARPHRD_IEEE1394) &&
2686 (dev->type != ARPHRD_TUNNEL6)) {
Herbert Xu74235a22007-06-14 13:02:55 -07002687 /* Alas, we support only Ethernet autoconfiguration. */
2688 return;
2689 }
2690
Linus Torvalds1da177e2005-04-16 15:20:36 -07002691 idev = addrconf_add_dev(dev);
Brian Haley64e724f2010-07-20 10:34:30 +00002692 if (IS_ERR(idev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002693 return;
2694
2695 memset(&addr, 0, sizeof(struct in6_addr));
2696 addr.s6_addr32[0] = htonl(0xFE800000);
2697
2698 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2699 addrconf_add_linklocal(idev, &addr);
2700}
2701
Amerigo Wang07a93622012-10-29 16:23:10 +00002702#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002703static void addrconf_sit_config(struct net_device *dev)
2704{
2705 struct inet6_dev *idev;
2706
2707 ASSERT_RTNL();
2708
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002709 /*
2710 * Configure the tunnel with one of our IPv4
2711 * addresses... we should configure all of
Linus Torvalds1da177e2005-04-16 15:20:36 -07002712 * our v4 addrs in the tunnel
2713 */
2714
David S. Miller7eaa48a2013-08-20 23:44:39 -07002715 if ((idev = ipv6_find_idev(dev)) == NULL) {
Joe Perches91df42b2012-05-15 14:11:54 +00002716 pr_debug("%s: add_dev failed\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002717 return;
2718 }
2719
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11002720 if (dev->priv_flags & IFF_ISATAP) {
2721 struct in6_addr addr;
2722
2723 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
2724 addrconf_prefix_route(&addr, 64, dev, 0, 0);
2725 if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
2726 addrconf_add_linklocal(idev, &addr);
2727 return;
2728 }
2729
Linus Torvalds1da177e2005-04-16 15:20:36 -07002730 sit_add_v4_addrs(idev);
2731
Nicolas Dichtel62b54dd2012-10-01 23:19:14 +00002732 if (dev->flags&IFF_POINTOPOINT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002733 addrconf_add_mroute(dev);
Nicolas Dichtel62b54dd2012-10-01 23:19:14 +00002734 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07002735 sit_route_add(dev);
2736}
Joerg Roedel0be669b2006-10-10 14:49:53 -07002737#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002738
Amerigo Wang07a93622012-10-29 16:23:10 +00002739#if IS_ENABLED(CONFIG_NET_IPGRE)
stephen hemmingeraee80b52011-06-08 10:44:30 +00002740static void addrconf_gre_config(struct net_device *dev)
2741{
2742 struct inet6_dev *idev;
2743 struct in6_addr addr;
2744
stephen hemmingeraee80b52011-06-08 10:44:30 +00002745 ASSERT_RTNL();
2746
David S. Miller7eaa48a2013-08-20 23:44:39 -07002747 if ((idev = ipv6_find_idev(dev)) == NULL) {
Joe Perches91df42b2012-05-15 14:11:54 +00002748 pr_debug("%s: add_dev failed\n", __func__);
stephen hemmingeraee80b52011-06-08 10:44:30 +00002749 return;
2750 }
2751
2752 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
2753 addrconf_prefix_route(&addr, 64, dev, 0, 0);
2754
2755 if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
2756 addrconf_add_linklocal(idev, &addr);
2757}
2758#endif
2759
Linus Torvalds1da177e2005-04-16 15:20:36 -07002760static inline int
2761ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2762{
2763 struct in6_addr lladdr;
2764
Neil Horman95c385b2007-04-25 17:08:10 -07002765 if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002766 addrconf_add_linklocal(idev, &lladdr);
2767 return 0;
2768 }
2769 return -1;
2770}
2771
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002772static int addrconf_notify(struct notifier_block *this, unsigned long event,
Jiri Pirko351638e2013-05-28 01:30:21 +00002773 void *ptr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002774{
Jiri Pirko351638e2013-05-28 01:30:21 +00002775 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Eric Dumazet748e2d92012-08-22 21:50:59 +00002776 struct inet6_dev *idev = __in6_dev_get(dev);
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09002777 int run_pending = 0;
Herbert Xub217d612007-07-30 17:04:52 -07002778 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002779
Stephen Hemmingere21e8462010-03-20 16:09:01 -07002780 switch (event) {
YOSHIFUJI Hideaki45ba9dd2007-02-15 02:07:27 +09002781 case NETDEV_REGISTER:
Herbert Xu74235a22007-06-14 13:02:55 -07002782 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
YOSHIFUJI Hideaki45ba9dd2007-02-15 02:07:27 +09002783 idev = ipv6_add_dev(dev);
2784 if (!idev)
Herbert Xub217d612007-07-30 17:04:52 -07002785 return notifier_from_errno(-ENOMEM);
YOSHIFUJI Hideaki45ba9dd2007-02-15 02:07:27 +09002786 }
2787 break;
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002788
Linus Torvalds1da177e2005-04-16 15:20:36 -07002789 case NETDEV_UP:
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002790 case NETDEV_CHANGE:
Jay Vosburghc2edacf2007-07-09 10:42:47 -07002791 if (dev->flags & IFF_SLAVE)
2792 break;
2793
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002794 if (event == NETDEV_UP) {
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -07002795 if (!addrconf_qdisc_ok(dev)) {
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002796 /* device is not ready yet. */
Joe Perchesf3213832012-05-15 14:11:53 +00002797 pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n",
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002798 dev->name);
2799 break;
2800 }
Kristian Slavov99081042006-02-08 16:10:53 -08002801
Evgeniy Polyakovd31c7b82007-11-30 23:36:08 +11002802 if (!idev && dev->mtu >= IPV6_MIN_MTU)
2803 idev = ipv6_add_dev(dev);
2804
Benjamin Therye3ec6cf2008-11-05 01:43:57 -08002805 if (idev) {
Kristian Slavov99081042006-02-08 16:10:53 -08002806 idev->if_flags |= IF_READY;
Benjamin Therye3ec6cf2008-11-05 01:43:57 -08002807 run_pending = 1;
2808 }
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002809 } else {
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -07002810 if (!addrconf_qdisc_ok(dev)) {
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002811 /* device is still not ready. */
2812 break;
2813 }
2814
2815 if (idev) {
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002816 if (idev->if_flags & IF_READY)
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002817 /* device is already configured. */
2818 break;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002819 idev->if_flags |= IF_READY;
2820 }
2821
Joe Perchesf3213832012-05-15 14:11:53 +00002822 pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n",
2823 dev->name);
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002824
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09002825 run_pending = 1;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002826 }
2827
Stephen Hemmingere21e8462010-03-20 16:09:01 -07002828 switch (dev->type) {
Amerigo Wang07a93622012-10-29 16:23:10 +00002829#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002830 case ARPHRD_SIT:
2831 addrconf_sit_config(dev);
2832 break;
Joerg Roedel0be669b2006-10-10 14:49:53 -07002833#endif
Amerigo Wang07a93622012-10-29 16:23:10 +00002834#if IS_ENABLED(CONFIG_NET_IPGRE)
stephen hemmingeraee80b52011-06-08 10:44:30 +00002835 case ARPHRD_IPGRE:
2836 addrconf_gre_config(dev);
2837 break;
2838#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002839 case ARPHRD_LOOPBACK:
2840 init_loopback(dev);
2841 break;
2842
2843 default:
2844 addrconf_dev_config(dev);
2845 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07002846 }
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002847
Linus Torvalds1da177e2005-04-16 15:20:36 -07002848 if (idev) {
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09002849 if (run_pending)
2850 addrconf_dad_run(idev);
2851
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002852 /*
2853 * If the MTU changed during the interface down,
2854 * when the interface up, the changed MTU must be
2855 * reflected in the idev as well as routers.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002856 */
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002857 if (idev->cnf.mtu6 != dev->mtu &&
2858 dev->mtu >= IPV6_MIN_MTU) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002859 rt6_mtu_change(dev, dev->mtu);
2860 idev->cnf.mtu6 = dev->mtu;
2861 }
2862 idev->tstamp = jiffies;
2863 inet6_ifinfo_notify(RTM_NEWLINK, idev);
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002864
2865 /*
2866 * If the changed mtu during down is lower than
2867 * IPV6_MIN_MTU stop IPv6 on this interface.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002868 */
2869 if (dev->mtu < IPV6_MIN_MTU)
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002870 addrconf_ifdown(dev, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002871 }
2872 break;
2873
2874 case NETDEV_CHANGEMTU:
Evgeniy Polyakovd31c7b82007-11-30 23:36:08 +11002875 if (idev && dev->mtu >= IPV6_MIN_MTU) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002876 rt6_mtu_change(dev, dev->mtu);
2877 idev->cnf.mtu6 = dev->mtu;
2878 break;
2879 }
2880
Evgeniy Polyakovd31c7b82007-11-30 23:36:08 +11002881 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2882 idev = ipv6_add_dev(dev);
2883 if (idev)
2884 break;
2885 }
2886
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002887 /*
2888 * MTU falled under IPV6_MIN_MTU.
2889 * Stop IPv6 on this interface.
2890 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002891
2892 case NETDEV_DOWN:
2893 case NETDEV_UNREGISTER:
2894 /*
2895 * Remove all addresses from this interface.
2896 */
2897 addrconf_ifdown(dev, event != NETDEV_DOWN);
2898 break;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002899
Linus Torvalds1da177e2005-04-16 15:20:36 -07002900 case NETDEV_CHANGENAME:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002901 if (idev) {
Stephen Hemminger5632c512007-04-28 21:16:39 -07002902 snmp6_unregister_dev(idev);
Pavel Emelyanov408c4762008-01-10 17:41:21 -08002903 addrconf_sysctl_unregister(idev);
Pavel Emelyanovf52295a2007-12-02 00:58:37 +11002904 addrconf_sysctl_register(idev);
Herbert Xub217d612007-07-30 17:04:52 -07002905 err = snmp6_register_dev(idev);
2906 if (err)
2907 return notifier_from_errno(err);
Stephen Hemminger5632c512007-04-28 21:16:39 -07002908 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002909 break;
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002910
Jiri Pirko93d9b7d2010-03-10 10:28:56 +00002911 case NETDEV_PRE_TYPE_CHANGE:
2912 case NETDEV_POST_TYPE_CHANGE:
2913 addrconf_type_change(dev, event);
Moni Shoua75c78502009-09-15 02:37:40 -07002914 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07002915 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002916
2917 return NOTIFY_OK;
2918}
2919
2920/*
2921 * addrconf module should be notified of a device going up
2922 */
2923static struct notifier_block ipv6_dev_notf = {
2924 .notifier_call = addrconf_notify,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002925};
2926
Jiri Pirko93d9b7d2010-03-10 10:28:56 +00002927static void addrconf_type_change(struct net_device *dev, unsigned long event)
Moni Shoua75c78502009-09-15 02:37:40 -07002928{
2929 struct inet6_dev *idev;
2930 ASSERT_RTNL();
2931
2932 idev = __in6_dev_get(dev);
2933
Jiri Pirko93d9b7d2010-03-10 10:28:56 +00002934 if (event == NETDEV_POST_TYPE_CHANGE)
Moni Shoua75c78502009-09-15 02:37:40 -07002935 ipv6_mc_remap(idev);
Jiri Pirko93d9b7d2010-03-10 10:28:56 +00002936 else if (event == NETDEV_PRE_TYPE_CHANGE)
Moni Shoua75c78502009-09-15 02:37:40 -07002937 ipv6_mc_unmap(idev);
2938}
2939
Linus Torvalds1da177e2005-04-16 15:20:36 -07002940static int addrconf_ifdown(struct net_device *dev, int how)
2941{
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09002942 struct net *net = dev_net(dev);
stephen hemminger502a2ff2010-03-17 20:31:13 +00002943 struct inet6_dev *idev;
2944 struct inet6_ifaddr *ifa;
David S. Miller73a8bd72011-01-23 23:27:15 -08002945 int state, i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002946
2947 ASSERT_RTNL();
2948
David S. Miller73a8bd72011-01-23 23:27:15 -08002949 rt6_ifdown(net, dev);
2950 neigh_ifdown(&nd_tbl, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002951
2952 idev = __in6_dev_get(dev);
2953 if (idev == NULL)
2954 return -ENODEV;
2955
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002956 /*
2957 * Step 1: remove reference to ipv6 device from parent device.
2958 * Do not dev_put!
Linus Torvalds1da177e2005-04-16 15:20:36 -07002959 */
Denis V. Lunev439e2382008-04-03 13:30:17 -07002960 if (how) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002961 idev->dead = 1;
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07002962
2963 /* protected by rtnl_lock */
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +00002964 RCU_INIT_POINTER(dev->ip6_ptr, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002965
2966 /* Step 1.5: remove snmp6 entry */
2967 snmp6_unregister_dev(idev);
2968
2969 }
2970
David S. Miller73a8bd72011-01-23 23:27:15 -08002971 /* Step 2: clear hash table */
2972 for (i = 0; i < IN6_ADDR_HSIZE; i++) {
2973 struct hlist_head *h = &inet6_addr_lst[i];
David S. Miller73a8bd72011-01-23 23:27:15 -08002974
2975 spin_lock_bh(&addrconf_hash_lock);
2976 restart:
Sasha Levinb67bfe02013-02-27 17:06:00 -08002977 hlist_for_each_entry_rcu(ifa, h, addr_lst) {
David S. Miller73a8bd72011-01-23 23:27:15 -08002978 if (ifa->idev == idev) {
2979 hlist_del_init_rcu(&ifa->addr_lst);
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02002980 addrconf_del_dad_timer(ifa);
David S. Miller73a8bd72011-01-23 23:27:15 -08002981 goto restart;
2982 }
2983 }
2984 spin_unlock_bh(&addrconf_hash_lock);
2985 }
2986
Linus Torvalds1da177e2005-04-16 15:20:36 -07002987 write_lock_bh(&idev->lock);
2988
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02002989 addrconf_del_rs_timer(idev);
2990
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002991 /* Step 2: clear flags for stateless addrconf */
Denis V. Lunev439e2382008-04-03 13:30:17 -07002992 if (!how)
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09002993 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002994
Linus Torvalds1da177e2005-04-16 15:20:36 -07002995#ifdef CONFIG_IPV6_PRIVACY
Denis V. Lunev439e2382008-04-03 13:30:17 -07002996 if (how && del_timer(&idev->regen_timer))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002997 in6_dev_put(idev);
2998
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07002999 /* Step 3: clear tempaddr list */
stephen hemminger372e6c82010-03-17 20:31:09 +00003000 while (!list_empty(&idev->tempaddr_list)) {
3001 ifa = list_first_entry(&idev->tempaddr_list,
3002 struct inet6_ifaddr, tmp_list);
3003 list_del(&ifa->tmp_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003004 write_unlock_bh(&idev->lock);
3005 spin_lock_bh(&ifa->lock);
3006
3007 if (ifa->ifpub) {
3008 in6_ifa_put(ifa->ifpub);
3009 ifa->ifpub = NULL;
3010 }
3011 spin_unlock_bh(&ifa->lock);
3012 in6_ifa_put(ifa);
3013 write_lock_bh(&idev->lock);
3014 }
3015#endif
stephen hemminger8f37ada2010-03-03 08:19:59 +00003016
stephen hemminger502a2ff2010-03-17 20:31:13 +00003017 while (!list_empty(&idev->addr_list)) {
3018 ifa = list_first_entry(&idev->addr_list,
3019 struct inet6_ifaddr, if_list);
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003020 addrconf_del_dad_timer(ifa);
stephen hemminger84e8b802010-03-02 13:32:46 +00003021
David S. Miller73a8bd72011-01-23 23:27:15 -08003022 list_del(&ifa->if_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003023
David S. Miller73a8bd72011-01-23 23:27:15 -08003024 write_unlock_bh(&idev->lock);
stephen hemminger84e8b802010-03-02 13:32:46 +00003025
David S. Miller73a8bd72011-01-23 23:27:15 -08003026 spin_lock_bh(&ifa->state_lock);
3027 state = ifa->state;
3028 ifa->state = INET6_IFADDR_STATE_DEAD;
3029 spin_unlock_bh(&ifa->state_lock);
stephen hemminger84e8b802010-03-02 13:32:46 +00003030
David S. Miller73a8bd72011-01-23 23:27:15 -08003031 if (state != INET6_IFADDR_STATE_DEAD) {
3032 __ipv6_ifa_notify(RTM_DELADDR, ifa);
Cong Wangf88c91d2013-04-14 23:18:43 +08003033 inet6addr_notifier_call_chain(NETDEV_DOWN, ifa);
stephen hemminger27bdb2a2010-04-12 05:41:32 +00003034 }
David S. Miller73a8bd72011-01-23 23:27:15 -08003035 in6_ifa_put(ifa);
stephen hemminger8f37ada2010-03-03 08:19:59 +00003036
David S. Miller73a8bd72011-01-23 23:27:15 -08003037 write_lock_bh(&idev->lock);
3038 }
stephen hemminger8f37ada2010-03-03 08:19:59 +00003039
Linus Torvalds1da177e2005-04-16 15:20:36 -07003040 write_unlock_bh(&idev->lock);
3041
3042 /* Step 5: Discard multicast list */
Denis V. Lunev439e2382008-04-03 13:30:17 -07003043 if (how)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003044 ipv6_mc_destroy_dev(idev);
3045 else
3046 ipv6_mc_down(idev);
3047
Linus Torvalds1da177e2005-04-16 15:20:36 -07003048 idev->tstamp = jiffies;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003049
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003050 /* Last: Shot the device (if unregistered) */
Denis V. Lunev439e2382008-04-03 13:30:17 -07003051 if (how) {
Pavel Emelyanov408c4762008-01-10 17:41:21 -08003052 addrconf_sysctl_unregister(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003053 neigh_parms_release(&nd_tbl, idev->nd_parms);
3054 neigh_ifdown(&nd_tbl, dev);
3055 in6_dev_put(idev);
3056 }
3057 return 0;
3058}
3059
3060static void addrconf_rs_timer(unsigned long data)
3061{
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003062 struct inet6_dev *idev = (struct inet6_dev *)data;
Cong Wangcaf92bc2013-08-31 13:44:32 +08003063 struct net_device *dev = idev->dev;
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003064 struct in6_addr lladdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003065
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003066 write_lock(&idev->lock);
stephen hemminger5b2a1952010-03-02 13:32:45 +00003067 if (idev->dead || !(idev->if_flags & IF_READY))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003068 goto out;
3069
Shmulik Ladkani9ba2add2012-12-02 01:44:53 +00003070 if (!ipv6_accept_ra(idev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003071 goto out;
stephen hemminger5b2a1952010-03-02 13:32:45 +00003072
3073 /* Announcement received after solicitation was sent */
3074 if (idev->if_flags & IF_RA_RCVD)
3075 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003076
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003077 if (idev->rs_probes++ < idev->cnf.rtr_solicits) {
Cong Wangcaf92bc2013-08-31 13:44:32 +08003078 write_unlock(&idev->lock);
3079 if (!ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE))
3080 ndisc_send_rs(dev, &lladdr,
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003081 &in6addr_linklocal_allrouters);
3082 else
Cong Wangcaf92bc2013-08-31 13:44:32 +08003083 goto put;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003084
Cong Wangcaf92bc2013-08-31 13:44:32 +08003085 write_lock(&idev->lock);
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003086 /* The wait after the last probe can be shorter */
3087 addrconf_mod_rs_timer(idev, (idev->rs_probes ==
3088 idev->cnf.rtr_solicits) ?
3089 idev->cnf.rtr_solicit_delay :
3090 idev->cnf.rtr_solicit_interval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003091 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003092 /*
3093 * Note: we do not support deprecated "all on-link"
3094 * assumption any longer.
3095 */
Joe Perches91df42b2012-05-15 14:11:54 +00003096 pr_debug("%s: no IPv6 routers present\n", idev->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003097 }
3098
3099out:
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003100 write_unlock(&idev->lock);
Cong Wangcaf92bc2013-08-31 13:44:32 +08003101put:
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003102 in6_dev_put(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003103}
3104
3105/*
3106 * Duplicate Address Detection
3107 */
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003108static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
3109{
3110 unsigned long rand_num;
3111 struct inet6_dev *idev = ifp->idev;
3112
Neil Horman95c385b2007-04-25 17:08:10 -07003113 if (ifp->flags & IFA_F_OPTIMISTIC)
3114 rand_num = 0;
3115 else
3116 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
3117
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003118 ifp->dad_probes = idev->cnf.dad_transmits;
3119 addrconf_mod_dad_timer(ifp, rand_num);
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003120}
3121
David S. Millercf22f9a2012-04-14 21:37:40 -04003122static void addrconf_dad_start(struct inet6_ifaddr *ifp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003123{
3124 struct inet6_dev *idev = ifp->idev;
3125 struct net_device *dev = idev->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003126
3127 addrconf_join_solict(dev, &ifp->addr);
3128
Linus Torvalds1da177e2005-04-16 15:20:36 -07003129 net_srandom(ifp->addr.s6_addr32[3]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003130
3131 read_lock_bh(&idev->lock);
Herbert Xu622ccdf2010-05-18 15:56:06 -07003132 spin_lock(&ifp->lock);
Herbert Xue9d3e082010-05-18 15:36:06 -07003133 if (ifp->state == INET6_IFADDR_STATE_DEAD)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003134 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003135
3136 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09003137 idev->cnf.accept_dad < 1 ||
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003138 !(ifp->flags&IFA_F_TENTATIVE) ||
3139 ifp->flags & IFA_F_NODAD) {
Brian Haleycc411d02009-09-09 14:41:32 +00003140 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED);
stephen hemminger21809fa2010-02-08 19:48:52 +00003141 spin_unlock(&ifp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003142 read_unlock_bh(&idev->lock);
3143
3144 addrconf_dad_completed(ifp);
3145 return;
3146 }
3147
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08003148 if (!(idev->if_flags & IF_READY)) {
stephen hemminger21809fa2010-02-08 19:48:52 +00003149 spin_unlock(&ifp->lock);
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08003150 read_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003151 /*
Masatake YAMATO590a9882009-06-09 10:41:12 +09003152 * If the device is not ready:
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003153 * - keep it tentative if it is a permanent address.
3154 * - otherwise, kill it.
3155 */
3156 in6_ifa_hold(ifp);
Brian Haleycc411d02009-09-09 14:41:32 +00003157 addrconf_dad_stop(ifp, 0);
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08003158 return;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003159 }
Neil Horman95c385b2007-04-25 17:08:10 -07003160
3161 /*
3162 * Optimistic nodes can start receiving
3163 * Frames right away
3164 */
Stephen Hemmingere21e8462010-03-20 16:09:01 -07003165 if (ifp->flags & IFA_F_OPTIMISTIC)
Neil Horman95c385b2007-04-25 17:08:10 -07003166 ip6_ins_rt(ifp->rt);
3167
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08003168 addrconf_dad_kick(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003169out:
Herbert Xu622ccdf2010-05-18 15:56:06 -07003170 spin_unlock(&ifp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003171 read_unlock_bh(&idev->lock);
3172}
3173
3174static void addrconf_dad_timer(unsigned long data)
3175{
3176 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
3177 struct inet6_dev *idev = ifp->idev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003178 struct in6_addr mcaddr;
3179
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003180 if (!ifp->dad_probes && addrconf_dad_end(ifp))
Herbert Xuf2344a12010-05-18 15:55:27 -07003181 goto out;
3182
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003183 write_lock(&idev->lock);
stephen hemminger122e4512010-03-02 13:32:44 +00003184 if (idev->dead || !(idev->if_flags & IF_READY)) {
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003185 write_unlock(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003186 goto out;
3187 }
stephen hemminger21809fa2010-02-08 19:48:52 +00003188
3189 spin_lock(&ifp->lock);
Herbert Xu622ccdf2010-05-18 15:56:06 -07003190 if (ifp->state == INET6_IFADDR_STATE_DEAD) {
3191 spin_unlock(&ifp->lock);
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003192 write_unlock(&idev->lock);
Herbert Xu622ccdf2010-05-18 15:56:06 -07003193 goto out;
3194 }
3195
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003196 if (ifp->dad_probes == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003197 /*
3198 * DAD was successful
3199 */
3200
Brian Haleycc411d02009-09-09 14:41:32 +00003201 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED);
stephen hemminger21809fa2010-02-08 19:48:52 +00003202 spin_unlock(&ifp->lock);
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003203 write_unlock(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003204
3205 addrconf_dad_completed(ifp);
3206
3207 goto out;
3208 }
3209
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003210 ifp->dad_probes--;
3211 addrconf_mod_dad_timer(ifp, ifp->idev->nd_parms->retrans_time);
stephen hemminger21809fa2010-02-08 19:48:52 +00003212 spin_unlock(&ifp->lock);
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003213 write_unlock(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003214
3215 /* send a neighbour solicitation for our addr */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003216 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
YOSHIFUJI Hideakid7aabf22008-04-10 15:42:11 +09003217 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003218out:
3219 in6_ifa_put(ifp);
3220}
3221
3222static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
3223{
Stephen Hemmingere21e8462010-03-20 16:09:01 -07003224 struct net_device *dev = ifp->idev->dev;
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003225 struct in6_addr lladdr;
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02003226 bool send_rs, send_mld;
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003227
3228 addrconf_del_dad_timer(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003229
3230 /*
3231 * Configure the address for reception. Now it is valid.
3232 */
3233
3234 ipv6_ifa_notify(RTM_NEWADDR, ifp);
3235
Tore Anderson026359b2011-08-28 23:47:33 +00003236 /* If added prefix is link local and we are prepared to process
3237 router advertisements, start sending router solicitations.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003238 */
3239
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02003240 read_lock_bh(&ifp->idev->lock);
3241 spin_lock(&ifp->lock);
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02003242 send_mld = ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL &&
3243 ifp->idev->valid_ll_addr_cnt == 1;
3244 send_rs = send_mld &&
3245 ipv6_accept_ra(ifp->idev) &&
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02003246 ifp->idev->cnf.rtr_solicits > 0 &&
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02003247 (dev->flags&IFF_LOOPBACK) == 0;
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02003248 spin_unlock(&ifp->lock);
3249 read_unlock_bh(&ifp->idev->lock);
3250
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02003251 /* While dad is in progress mld report's source address is in6_addrany.
3252 * Resend with proper ll now.
3253 */
3254 if (send_mld)
3255 ipv6_mc_dad_complete(ifp->idev);
3256
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02003257 if (send_rs) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003258 /*
3259 * If a host as already performed a random delay
3260 * [...] as part of DAD [...] there is no need
3261 * to delay again before sending the first RS
3262 */
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02003263 if (ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE))
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003264 return;
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02003265 ndisc_send_rs(dev, &lladdr, &in6addr_linklocal_allrouters);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003266
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003267 write_lock_bh(&ifp->idev->lock);
3268 spin_lock(&ifp->lock);
3269 ifp->idev->rs_probes = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003270 ifp->idev->if_flags |= IF_RS_SENT;
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003271 addrconf_mod_rs_timer(ifp->idev,
3272 ifp->idev->cnf.rtr_solicit_interval);
3273 spin_unlock(&ifp->lock);
3274 write_unlock_bh(&ifp->idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003275 }
3276}
3277
Stephen Hemmingere21e8462010-03-20 16:09:01 -07003278static void addrconf_dad_run(struct inet6_dev *idev)
3279{
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09003280 struct inet6_ifaddr *ifp;
3281
3282 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00003283 list_for_each_entry(ifp, &idev->addr_list, if_list) {
stephen hemminger21809fa2010-02-08 19:48:52 +00003284 spin_lock(&ifp->lock);
Herbert Xuf2344a12010-05-18 15:55:27 -07003285 if (ifp->flags & IFA_F_TENTATIVE &&
3286 ifp->state == INET6_IFADDR_STATE_DAD)
3287 addrconf_dad_kick(ifp);
stephen hemminger21809fa2010-02-08 19:48:52 +00003288 spin_unlock(&ifp->lock);
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09003289 }
3290 read_unlock_bh(&idev->lock);
3291}
3292
Linus Torvalds1da177e2005-04-16 15:20:36 -07003293#ifdef CONFIG_PROC_FS
3294struct if6_iter_state {
Daniel Lezcano3c400902008-01-10 22:42:49 -08003295 struct seq_net_private p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003296 int bucket;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003297 int offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003298};
3299
Mihai Maruseac1d578302012-01-03 23:31:35 +00003300static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003301{
3302 struct inet6_ifaddr *ifa = NULL;
3303 struct if6_iter_state *state = seq->private;
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +09003304 struct net *net = seq_file_net(seq);
Mihai Maruseac1d578302012-01-03 23:31:35 +00003305 int p = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003306
Mihai Maruseac1d578302012-01-03 23:31:35 +00003307 /* initial bucket if pos is 0 */
3308 if (pos == 0) {
3309 state->bucket = 0;
3310 state->offset = 0;
3311 }
3312
3313 for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
Sasha Levinb67bfe02013-02-27 17:06:00 -08003314 hlist_for_each_entry_rcu_bh(ifa, &inet6_addr_lst[state->bucket],
Mihai Maruseac1d578302012-01-03 23:31:35 +00003315 addr_lst) {
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003316 if (!net_eq(dev_net(ifa->idev->dev), net))
3317 continue;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003318 /* sync with offset */
3319 if (p < state->offset) {
3320 p++;
3321 continue;
3322 }
3323 state->offset++;
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003324 return ifa;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003325 }
3326
3327 /* prepare for next bucket */
3328 state->offset = 0;
3329 p = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003330 }
stephen hemmingerc2e21292010-03-17 20:31:10 +00003331 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003332}
3333
stephen hemmingerc2e21292010-03-17 20:31:10 +00003334static struct inet6_ifaddr *if6_get_next(struct seq_file *seq,
3335 struct inet6_ifaddr *ifa)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003336{
3337 struct if6_iter_state *state = seq->private;
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +09003338 struct net *net = seq_file_net(seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003339
Sasha Levinb67bfe02013-02-27 17:06:00 -08003340 hlist_for_each_entry_continue_rcu_bh(ifa, addr_lst) {
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003341 if (!net_eq(dev_net(ifa->idev->dev), net))
3342 continue;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003343 state->offset++;
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003344 return ifa;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003345 }
stephen hemmingerc2e21292010-03-17 20:31:10 +00003346
3347 while (++state->bucket < IN6_ADDR_HSIZE) {
Mihai Maruseac1d578302012-01-03 23:31:35 +00003348 state->offset = 0;
Sasha Levinb67bfe02013-02-27 17:06:00 -08003349 hlist_for_each_entry_rcu_bh(ifa,
stephen hemmingerc2e21292010-03-17 20:31:10 +00003350 &inet6_addr_lst[state->bucket], addr_lst) {
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003351 if (!net_eq(dev_net(ifa->idev->dev), net))
3352 continue;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003353 state->offset++;
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003354 return ifa;
Daniel Lezcano3c400902008-01-10 22:42:49 -08003355 }
3356 }
3357
stephen hemmingerc2e21292010-03-17 20:31:10 +00003358 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003359}
3360
Linus Torvalds1da177e2005-04-16 15:20:36 -07003361static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
Eric Dumazet4f70ecc2010-05-03 10:50:14 +00003362 __acquires(rcu_bh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003363{
stephen hemminger5c578ae2010-03-17 20:31:11 +00003364 rcu_read_lock_bh();
Mihai Maruseac1d578302012-01-03 23:31:35 +00003365 return if6_get_first(seq, *pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003366}
3367
3368static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
3369{
3370 struct inet6_ifaddr *ifa;
3371
3372 ifa = if6_get_next(seq, v);
3373 ++*pos;
3374 return ifa;
3375}
3376
3377static void if6_seq_stop(struct seq_file *seq, void *v)
Eric Dumazet4f70ecc2010-05-03 10:50:14 +00003378 __releases(rcu_bh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003379{
stephen hemminger5c578ae2010-03-17 20:31:11 +00003380 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003381}
3382
3383static int if6_seq_show(struct seq_file *seq, void *v)
3384{
3385 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
Harvey Harrison4b7a4272008-10-29 12:50:24 -07003386 seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n",
Harvey Harrisonb0711952008-10-28 16:05:40 -07003387 &ifp->addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003388 ifp->idev->dev->ifindex,
3389 ifp->prefix_len,
3390 ifp->scope,
3391 ifp->flags,
3392 ifp->idev->dev->name);
3393 return 0;
3394}
3395
Philippe De Muyter56b3d972007-07-10 23:07:31 -07003396static const struct seq_operations if6_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003397 .start = if6_seq_start,
3398 .next = if6_seq_next,
3399 .show = if6_seq_show,
3400 .stop = if6_seq_stop,
3401};
3402
3403static int if6_seq_open(struct inode *inode, struct file *file)
3404{
Daniel Lezcano3c400902008-01-10 22:42:49 -08003405 return seq_open_net(inode, file, &if6_seq_ops,
3406 sizeof(struct if6_iter_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003407}
3408
Arjan van de Ven9a321442007-02-12 00:55:35 -08003409static const struct file_operations if6_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003410 .owner = THIS_MODULE,
3411 .open = if6_seq_open,
3412 .read = seq_read,
3413 .llseek = seq_lseek,
Daniel Lezcano3c400902008-01-10 22:42:49 -08003414 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003415};
3416
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00003417static int __net_init if6_proc_net_init(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003418{
Gao fengd4beaa62013-02-18 01:34:54 +00003419 if (!proc_create("if_inet6", S_IRUGO, net->proc_net, &if6_fops))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003420 return -ENOMEM;
3421 return 0;
3422}
3423
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00003424static void __net_exit if6_proc_net_exit(struct net *net)
Daniel Lezcano3c400902008-01-10 22:42:49 -08003425{
Gao fengece31ff2013-02-18 01:34:56 +00003426 remove_proc_entry("if_inet6", net->proc_net);
Daniel Lezcano3c400902008-01-10 22:42:49 -08003427}
3428
3429static struct pernet_operations if6_proc_net_ops = {
3430 .init = if6_proc_net_init,
3431 .exit = if6_proc_net_exit,
3432};
3433
3434int __init if6_proc_init(void)
3435{
3436 return register_pernet_subsys(&if6_proc_net_ops);
3437}
3438
Linus Torvalds1da177e2005-04-16 15:20:36 -07003439void if6_proc_exit(void)
3440{
Daniel Lezcano3c400902008-01-10 22:42:49 -08003441 unregister_pernet_subsys(&if6_proc_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003442}
3443#endif /* CONFIG_PROC_FS */
3444
Amerigo Wang07a93622012-10-29 16:23:10 +00003445#if IS_ENABLED(CONFIG_IPV6_MIP6)
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003446/* Check if address is a home address configured on any interface. */
Eric Dumazetb71d1d42011-04-22 04:53:02 +00003447int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr)
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003448{
3449 int ret = 0;
stephen hemmingerc2e21292010-03-17 20:31:10 +00003450 struct inet6_ifaddr *ifp = NULL;
Eric Dumazetddbe5032012-07-18 08:11:12 +00003451 unsigned int hash = inet6_addr_hash(addr);
stephen hemmingerc2e21292010-03-17 20:31:10 +00003452
stephen hemminger5c578ae2010-03-17 20:31:11 +00003453 rcu_read_lock_bh();
Sasha Levinb67bfe02013-02-27 17:06:00 -08003454 hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09003455 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcano389f6612008-01-10 22:44:40 -08003456 continue;
YOSHIFUJI Hideakicaad2952008-04-10 15:42:07 +09003457 if (ipv6_addr_equal(&ifp->addr, addr) &&
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003458 (ifp->flags & IFA_F_HOMEADDRESS)) {
3459 ret = 1;
3460 break;
3461 }
3462 }
stephen hemminger5c578ae2010-03-17 20:31:11 +00003463 rcu_read_unlock_bh();
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003464 return ret;
3465}
3466#endif
3467
Linus Torvalds1da177e2005-04-16 15:20:36 -07003468/*
3469 * Periodic address status verification
3470 */
3471
3472static void addrconf_verify(unsigned long foo)
3473{
YOSHIFUJI Hideakib2db7562010-03-20 16:11:12 -07003474 unsigned long now, next, next_sec, next_sched;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003475 struct inet6_ifaddr *ifp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003476 int i;
3477
stephen hemminger5c578ae2010-03-17 20:31:11 +00003478 rcu_read_lock_bh();
3479 spin_lock(&addrconf_verify_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003480 now = jiffies;
YOSHIFUJI Hideakib2db7562010-03-20 16:11:12 -07003481 next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003482
3483 del_timer(&addr_chk_timer);
3484
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003485 for (i = 0; i < IN6_ADDR_HSIZE; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003486restart:
Sasha Levinb67bfe02013-02-27 17:06:00 -08003487 hlist_for_each_entry_rcu_bh(ifp,
stephen hemminger5c578ae2010-03-17 20:31:11 +00003488 &inet6_addr_lst[i], addr_lst) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003489 unsigned long age;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003490
3491 if (ifp->flags & IFA_F_PERMANENT)
3492 continue;
3493
3494 spin_lock(&ifp->lock);
YOSHIFUJI Hideakib2db7562010-03-20 16:11:12 -07003495 /* We try to batch several events at once. */
3496 age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003497
YOSHIFUJI Hideaki8f27ebb2006-07-28 18:12:11 +09003498 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
3499 age >= ifp->valid_lft) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003500 spin_unlock(&ifp->lock);
3501 in6_ifa_hold(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003502 ipv6_del_addr(ifp);
3503 goto restart;
YOSHIFUJI Hideaki8f27ebb2006-07-28 18:12:11 +09003504 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
3505 spin_unlock(&ifp->lock);
3506 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003507 } else if (age >= ifp->prefered_lft) {
Brian Haleya1ed0522009-07-02 07:10:52 +00003508 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003509 int deprecate = 0;
3510
3511 if (!(ifp->flags&IFA_F_DEPRECATED)) {
3512 deprecate = 1;
3513 ifp->flags |= IFA_F_DEPRECATED;
3514 }
3515
3516 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
3517 next = ifp->tstamp + ifp->valid_lft * HZ;
3518
3519 spin_unlock(&ifp->lock);
3520
3521 if (deprecate) {
3522 in6_ifa_hold(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003523
3524 ipv6_ifa_notify(0, ifp);
3525 in6_ifa_put(ifp);
3526 goto restart;
3527 }
3528#ifdef CONFIG_IPV6_PRIVACY
3529 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
3530 !(ifp->flags&IFA_F_TENTATIVE)) {
stephen hemminger88949cf2010-03-17 20:31:17 +00003531 unsigned long regen_advance = ifp->idev->cnf.regen_max_retry *
3532 ifp->idev->cnf.dad_transmits *
3533 ifp->idev->nd_parms->retrans_time / HZ;
3534
Linus Torvalds1da177e2005-04-16 15:20:36 -07003535 if (age >= ifp->prefered_lft - regen_advance) {
3536 struct inet6_ifaddr *ifpub = ifp->ifpub;
3537 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3538 next = ifp->tstamp + ifp->prefered_lft * HZ;
3539 if (!ifp->regen_count && ifpub) {
3540 ifp->regen_count++;
3541 in6_ifa_hold(ifp);
3542 in6_ifa_hold(ifpub);
3543 spin_unlock(&ifp->lock);
stephen hemminger5c578ae2010-03-17 20:31:11 +00003544
Hiroyuki YAMAMORI291d8092005-12-23 11:24:05 -08003545 spin_lock(&ifpub->lock);
3546 ifpub->regen_count = 0;
3547 spin_unlock(&ifpub->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003548 ipv6_create_tempaddr(ifpub, ifp);
3549 in6_ifa_put(ifpub);
3550 in6_ifa_put(ifp);
3551 goto restart;
3552 }
3553 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
3554 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
3555 spin_unlock(&ifp->lock);
3556#endif
3557 } else {
3558 /* ifp->prefered_lft <= ifp->valid_lft */
3559 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3560 next = ifp->tstamp + ifp->prefered_lft * HZ;
3561 spin_unlock(&ifp->lock);
3562 }
3563 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003564 }
3565
YOSHIFUJI Hideakib2db7562010-03-20 16:11:12 -07003566 next_sec = round_jiffies_up(next);
3567 next_sched = next;
3568
3569 /* If rounded timeout is accurate enough, accept it. */
3570 if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ))
3571 next_sched = next_sec;
3572
3573 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
3574 if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX))
3575 next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX;
3576
dingtianhongba3542e2013-08-17 10:27:04 +08003577 ADBG(KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
3578 now, next, next_sec, next_sched);
YOSHIFUJI Hideakib2db7562010-03-20 16:11:12 -07003579
3580 addr_chk_timer.expires = next_sched;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003581 add_timer(&addr_chk_timer);
stephen hemminger5c578ae2010-03-17 20:31:11 +00003582 spin_unlock(&addrconf_verify_lock);
3583 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003584}
3585
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00003586static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local,
3587 struct in6_addr **peer_pfx)
Thomas Graf461d8832006-09-18 00:09:49 -07003588{
3589 struct in6_addr *pfx = NULL;
3590
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00003591 *peer_pfx = NULL;
3592
Thomas Graf461d8832006-09-18 00:09:49 -07003593 if (addr)
3594 pfx = nla_data(addr);
3595
3596 if (local) {
3597 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00003598 *peer_pfx = pfx;
3599 pfx = nla_data(local);
Thomas Graf461d8832006-09-18 00:09:49 -07003600 }
3601
3602 return pfx;
3603}
3604
Patrick McHardyef7c79e2007-06-05 12:38:30 -07003605static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
Thomas Graf461d8832006-09-18 00:09:49 -07003606 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
3607 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
3608 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
3609};
3610
Linus Torvalds1da177e2005-04-16 15:20:36 -07003611static int
Thomas Graf661d2962013-03-21 07:45:29 +00003612inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003613{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09003614 struct net *net = sock_net(skb->sk);
Thomas Grafb933f712006-09-18 00:10:19 -07003615 struct ifaddrmsg *ifm;
3616 struct nlattr *tb[IFA_MAX+1];
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00003617 struct in6_addr *pfx, *peer_pfx;
Thomas Grafb933f712006-09-18 00:10:19 -07003618 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003619
Thomas Grafb933f712006-09-18 00:10:19 -07003620 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3621 if (err < 0)
3622 return err;
3623
3624 ifm = nlmsg_data(nlh);
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00003625 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003626 if (pfx == NULL)
3627 return -EINVAL;
3628
Daniel Lezcanoaf284932008-03-05 10:46:57 -08003629 return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003630}
3631
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003632static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
3633 u32 prefered_lft, u32 valid_lft)
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003634{
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07003635 u32 flags;
3636 clock_t expires;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09003637 unsigned long timeout;
YOSHIFUJI Hideaki46d48042007-02-07 20:36:26 +09003638
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003639 if (!valid_lft || (prefered_lft > valid_lft))
3640 return -EINVAL;
3641
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09003642 timeout = addrconf_timeout_fixup(valid_lft, HZ);
3643 if (addrconf_finite_timeout(timeout)) {
3644 expires = jiffies_to_clock_t(timeout * HZ);
3645 valid_lft = timeout;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07003646 flags = RTF_EXPIRES;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09003647 } else {
3648 expires = 0;
3649 flags = 0;
3650 ifa_flags |= IFA_F_PERMANENT;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07003651 }
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003652
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09003653 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
3654 if (addrconf_finite_timeout(timeout)) {
3655 if (timeout == 0)
3656 ifa_flags |= IFA_F_DEPRECATED;
3657 prefered_lft = timeout;
3658 }
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003659
3660 spin_lock_bh(&ifp->lock);
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003661 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 +09003662 ifp->tstamp = jiffies;
3663 ifp->valid_lft = valid_lft;
3664 ifp->prefered_lft = prefered_lft;
3665
3666 spin_unlock_bh(&ifp->lock);
3667 if (!(ifp->flags&IFA_F_TENTATIVE))
3668 ipv6_ifa_notify(0, ifp);
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003669
YOSHIFUJI Hideaki46d48042007-02-07 20:36:26 +09003670 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07003671 expires, flags);
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003672 addrconf_verify(0);
3673
3674 return 0;
3675}
3676
3677static int
Thomas Graf661d2962013-03-21 07:45:29 +00003678inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003679{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09003680 struct net *net = sock_net(skb->sk);
Thomas Graf461d8832006-09-18 00:09:49 -07003681 struct ifaddrmsg *ifm;
3682 struct nlattr *tb[IFA_MAX+1];
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00003683 struct in6_addr *pfx, *peer_pfx;
Thomas Graf7198f8c2006-09-18 00:13:46 -07003684 struct inet6_ifaddr *ifa;
3685 struct net_device *dev;
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003686 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
3687 u8 ifa_flags;
Thomas Graf461d8832006-09-18 00:09:49 -07003688 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003689
Thomas Graf461d8832006-09-18 00:09:49 -07003690 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3691 if (err < 0)
3692 return err;
3693
3694 ifm = nlmsg_data(nlh);
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00003695 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003696 if (pfx == NULL)
3697 return -EINVAL;
3698
Thomas Graf461d8832006-09-18 00:09:49 -07003699 if (tb[IFA_CACHEINFO]) {
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09003700 struct ifa_cacheinfo *ci;
Thomas Graf461d8832006-09-18 00:09:49 -07003701
3702 ci = nla_data(tb[IFA_CACHEINFO]);
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09003703 valid_lft = ci->ifa_valid;
Thomas Graf461d8832006-09-18 00:09:49 -07003704 preferred_lft = ci->ifa_prefered;
3705 } else {
3706 preferred_lft = INFINITY_LIFE_TIME;
3707 valid_lft = INFINITY_LIFE_TIME;
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09003708 }
3709
Daniel Lezcanoaf284932008-03-05 10:46:57 -08003710 dev = __dev_get_by_index(net, ifm->ifa_index);
Thomas Graf7198f8c2006-09-18 00:13:46 -07003711 if (dev == NULL)
3712 return -ENODEV;
3713
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003714 /* We ignore other flags so far. */
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003715 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003716
Daniel Lezcano1cab3da2008-01-10 22:44:09 -08003717 ifa = ipv6_get_ifaddr(net, pfx, dev, 1);
Thomas Graf7198f8c2006-09-18 00:13:46 -07003718 if (ifa == NULL) {
3719 /*
3720 * It would be best to check for !NLM_F_CREATE here but
3721 * userspace alreay relies on not having to provide this.
3722 */
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00003723 return inet6_addr_add(net, ifm->ifa_index, pfx, peer_pfx,
Daniel Lezcanoaf284932008-03-05 10:46:57 -08003724 ifm->ifa_prefixlen, ifa_flags,
3725 preferred_lft, valid_lft);
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09003726 }
3727
Thomas Graf7198f8c2006-09-18 00:13:46 -07003728 if (nlh->nlmsg_flags & NLM_F_EXCL ||
3729 !(nlh->nlmsg_flags & NLM_F_REPLACE))
3730 err = -EEXIST;
3731 else
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003732 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
Thomas Graf7198f8c2006-09-18 00:13:46 -07003733
3734 in6_ifa_put(ifa);
3735
3736 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003737}
3738
Thomas Graf101bb222006-09-18 00:11:52 -07003739static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3740 u8 scope, int ifindex)
3741{
3742 struct ifaddrmsg *ifm;
3743
3744 ifm = nlmsg_data(nlh);
3745 ifm->ifa_family = AF_INET6;
3746 ifm->ifa_prefixlen = prefixlen;
3747 ifm->ifa_flags = flags;
3748 ifm->ifa_scope = scope;
3749 ifm->ifa_index = ifindex;
3750}
3751
Thomas Graf85486af2006-09-18 00:11:24 -07003752static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3753 unsigned long tstamp, u32 preferred, u32 valid)
3754{
3755 struct ifa_cacheinfo ci;
3756
Thomas Graf18a31e12010-11-17 04:12:02 +00003757 ci.cstamp = cstamp_delta(cstamp);
3758 ci.tstamp = cstamp_delta(tstamp);
Thomas Graf85486af2006-09-18 00:11:24 -07003759 ci.ifa_prefered = preferred;
3760 ci.ifa_valid = valid;
3761
3762 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3763}
3764
Thomas Graf101bb222006-09-18 00:11:52 -07003765static inline int rt_scope(int ifa_scope)
3766{
3767 if (ifa_scope & IFA_HOST)
3768 return RT_SCOPE_HOST;
3769 else if (ifa_scope & IFA_LINK)
3770 return RT_SCOPE_LINK;
3771 else if (ifa_scope & IFA_SITE)
3772 return RT_SCOPE_SITE;
3773 else
3774 return RT_SCOPE_UNIVERSE;
3775}
3776
Thomas Graf0ab68032006-09-18 00:12:35 -07003777static inline int inet6_ifaddr_msgsize(void)
3778{
Thomas Graf339bf982006-11-10 14:10:15 -08003779 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00003780 + nla_total_size(16) /* IFA_LOCAL */
Thomas Graf339bf982006-11-10 14:10:15 -08003781 + nla_total_size(16) /* IFA_ADDRESS */
3782 + nla_total_size(sizeof(struct ifa_cacheinfo));
Thomas Graf0ab68032006-09-18 00:12:35 -07003783}
YOSHIFUJI Hideakic5396a32006-06-17 22:48:48 -07003784
Linus Torvalds1da177e2005-04-16 15:20:36 -07003785static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
Eric W. Biederman15e47302012-09-07 20:12:54 +00003786 u32 portid, u32 seq, int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003787{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003788 struct nlmsghdr *nlh;
Thomas Graf85486af2006-09-18 00:11:24 -07003789 u32 preferred, valid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003790
Eric W. Biederman15e47302012-09-07 20:12:54 +00003791 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags);
Thomas Graf0ab68032006-09-18 00:12:35 -07003792 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -08003793 return -EMSGSIZE;
Thomas Graf0ab68032006-09-18 00:12:35 -07003794
Thomas Graf101bb222006-09-18 00:11:52 -07003795 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3796 ifa->idev->dev->ifindex);
3797
Linus Torvalds1da177e2005-04-16 15:20:36 -07003798 if (!(ifa->flags&IFA_F_PERMANENT)) {
Thomas Graf85486af2006-09-18 00:11:24 -07003799 preferred = ifa->prefered_lft;
3800 valid = ifa->valid_lft;
3801 if (preferred != INFINITY_LIFE_TIME) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003802 long tval = (jiffies - ifa->tstamp)/HZ;
Jens Rosenbooma1faa692009-06-25 04:55:50 +00003803 if (preferred > tval)
3804 preferred -= tval;
3805 else
3806 preferred = 0;
Ben Hutchingsf56619f2010-06-26 11:37:47 +00003807 if (valid != INFINITY_LIFE_TIME) {
3808 if (valid > tval)
3809 valid -= tval;
3810 else
3811 valid = 0;
3812 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003813 }
3814 } else {
Thomas Graf85486af2006-09-18 00:11:24 -07003815 preferred = INFINITY_LIFE_TIME;
3816 valid = INFINITY_LIFE_TIME;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003817 }
Thomas Graf85486af2006-09-18 00:11:24 -07003818
Cong Wang7996c792013-05-22 05:41:06 +00003819 if (!ipv6_addr_any(&ifa->peer_addr)) {
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00003820 if (nla_put(skb, IFA_LOCAL, 16, &ifa->addr) < 0 ||
3821 nla_put(skb, IFA_ADDRESS, 16, &ifa->peer_addr) < 0)
3822 goto error;
3823 } else
3824 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0)
3825 goto error;
3826
3827 if (put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0)
3828 goto error;
Thomas Graf85486af2006-09-18 00:11:24 -07003829
Thomas Graf0ab68032006-09-18 00:12:35 -07003830 return nlmsg_end(skb, nlh);
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00003831
3832error:
3833 nlmsg_cancel(skb, nlh);
3834 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003835}
3836
3837static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
Eric W. Biederman15e47302012-09-07 20:12:54 +00003838 u32 portid, u32 seq, int event, u16 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003839{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003840 struct nlmsghdr *nlh;
Thomas Graf101bb222006-09-18 00:11:52 -07003841 u8 scope = RT_SCOPE_UNIVERSE;
3842 int ifindex = ifmca->idev->dev->ifindex;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003843
Thomas Graf101bb222006-09-18 00:11:52 -07003844 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3845 scope = RT_SCOPE_SITE;
3846
Eric W. Biederman15e47302012-09-07 20:12:54 +00003847 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags);
Thomas Graf0ab68032006-09-18 00:12:35 -07003848 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -08003849 return -EMSGSIZE;
Thomas Graf0ab68032006-09-18 00:12:35 -07003850
Thomas Graf101bb222006-09-18 00:11:52 -07003851 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
Thomas Graf0ab68032006-09-18 00:12:35 -07003852 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3853 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
Patrick McHardy26932562007-01-31 23:16:40 -08003854 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3855 nlmsg_cancel(skb, nlh);
3856 return -EMSGSIZE;
3857 }
Thomas Graf85486af2006-09-18 00:11:24 -07003858
Thomas Graf0ab68032006-09-18 00:12:35 -07003859 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003860}
3861
3862static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
Eric W. Biederman15e47302012-09-07 20:12:54 +00003863 u32 portid, u32 seq, int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003864{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003865 struct nlmsghdr *nlh;
Thomas Graf101bb222006-09-18 00:11:52 -07003866 u8 scope = RT_SCOPE_UNIVERSE;
3867 int ifindex = ifaca->aca_idev->dev->ifindex;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003868
Thomas Graf101bb222006-09-18 00:11:52 -07003869 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3870 scope = RT_SCOPE_SITE;
3871
Eric W. Biederman15e47302012-09-07 20:12:54 +00003872 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags);
Thomas Graf0ab68032006-09-18 00:12:35 -07003873 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -08003874 return -EMSGSIZE;
Thomas Graf0ab68032006-09-18 00:12:35 -07003875
Thomas Graf101bb222006-09-18 00:11:52 -07003876 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
Thomas Graf0ab68032006-09-18 00:12:35 -07003877 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3878 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
Patrick McHardy26932562007-01-31 23:16:40 -08003879 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3880 nlmsg_cancel(skb, nlh);
3881 return -EMSGSIZE;
3882 }
Thomas Graf85486af2006-09-18 00:11:24 -07003883
Thomas Graf0ab68032006-09-18 00:12:35 -07003884 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003885}
3886
Stephen Hemmingere21e8462010-03-20 16:09:01 -07003887enum addr_type_t {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003888 UNICAST_ADDR,
3889 MULTICAST_ADDR,
3890 ANYCAST_ADDR,
3891};
3892
Eric Dumazet234b27c2009-11-12 04:11:50 +00003893/* called with rcu_read_lock() */
3894static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb,
3895 struct netlink_callback *cb, enum addr_type_t type,
3896 int s_ip_idx, int *p_ip_idx)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003897{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003898 struct ifmcaddr6 *ifmca;
3899 struct ifacaddr6 *ifaca;
Eric Dumazet234b27c2009-11-12 04:11:50 +00003900 int err = 1;
3901 int ip_idx = *p_ip_idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003902
Eric Dumazet234b27c2009-11-12 04:11:50 +00003903 read_lock_bh(&idev->lock);
3904 switch (type) {
stephen hemminger502a2ff2010-03-17 20:31:13 +00003905 case UNICAST_ADDR: {
3906 struct inet6_ifaddr *ifa;
3907
Eric Dumazet234b27c2009-11-12 04:11:50 +00003908 /* unicast address incl. temp addr */
stephen hemminger502a2ff2010-03-17 20:31:13 +00003909 list_for_each_entry(ifa, &idev->addr_list, if_list) {
3910 if (++ip_idx < s_ip_idx)
Eric Dumazet234b27c2009-11-12 04:11:50 +00003911 continue;
3912 err = inet6_fill_ifaddr(skb, ifa,
Eric W. Biederman15e47302012-09-07 20:12:54 +00003913 NETLINK_CB(cb->skb).portid,
Eric Dumazet234b27c2009-11-12 04:11:50 +00003914 cb->nlh->nlmsg_seq,
3915 RTM_NEWADDR,
3916 NLM_F_MULTI);
3917 if (err <= 0)
3918 break;
Nicolas Dichtel63998ac2013-03-22 06:28:43 +00003919 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003920 }
Eric Dumazet234b27c2009-11-12 04:11:50 +00003921 break;
stephen hemminger502a2ff2010-03-17 20:31:13 +00003922 }
Eric Dumazet234b27c2009-11-12 04:11:50 +00003923 case MULTICAST_ADDR:
3924 /* multicast address */
3925 for (ifmca = idev->mc_list; ifmca;
3926 ifmca = ifmca->next, ip_idx++) {
3927 if (ip_idx < s_ip_idx)
3928 continue;
3929 err = inet6_fill_ifmcaddr(skb, ifmca,
Eric W. Biederman15e47302012-09-07 20:12:54 +00003930 NETLINK_CB(cb->skb).portid,
Eric Dumazet234b27c2009-11-12 04:11:50 +00003931 cb->nlh->nlmsg_seq,
3932 RTM_GETMULTICAST,
3933 NLM_F_MULTI);
3934 if (err <= 0)
3935 break;
3936 }
3937 break;
3938 case ANYCAST_ADDR:
3939 /* anycast address */
3940 for (ifaca = idev->ac_list; ifaca;
3941 ifaca = ifaca->aca_next, ip_idx++) {
3942 if (ip_idx < s_ip_idx)
3943 continue;
3944 err = inet6_fill_ifacaddr(skb, ifaca,
Eric W. Biederman15e47302012-09-07 20:12:54 +00003945 NETLINK_CB(cb->skb).portid,
Eric Dumazet234b27c2009-11-12 04:11:50 +00003946 cb->nlh->nlmsg_seq,
3947 RTM_GETANYCAST,
3948 NLM_F_MULTI);
3949 if (err <= 0)
3950 break;
3951 }
3952 break;
3953 default:
3954 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003955 }
Eric Dumazet234b27c2009-11-12 04:11:50 +00003956 read_unlock_bh(&idev->lock);
3957 *p_ip_idx = ip_idx;
3958 return err;
3959}
3960
3961static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3962 enum addr_type_t type)
3963{
3964 struct net *net = sock_net(skb->sk);
3965 int h, s_h;
3966 int idx, ip_idx;
3967 int s_idx, s_ip_idx;
3968 struct net_device *dev;
3969 struct inet6_dev *idev;
3970 struct hlist_head *head;
Eric Dumazet234b27c2009-11-12 04:11:50 +00003971
3972 s_h = cb->args[0];
3973 s_idx = idx = cb->args[1];
3974 s_ip_idx = ip_idx = cb->args[2];
3975
3976 rcu_read_lock();
Nicolas Dichtel63998ac2013-03-22 06:28:43 +00003977 cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ net->dev_base_seq;
Eric Dumazet234b27c2009-11-12 04:11:50 +00003978 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3979 idx = 0;
3980 head = &net->dev_index_head[h];
Sasha Levinb67bfe02013-02-27 17:06:00 -08003981 hlist_for_each_entry_rcu(dev, head, index_hlist) {
Eric Dumazet234b27c2009-11-12 04:11:50 +00003982 if (idx < s_idx)
3983 goto cont;
Patrick McHardy4b97efd2010-03-26 20:27:49 -07003984 if (h > s_h || idx > s_idx)
Eric Dumazet234b27c2009-11-12 04:11:50 +00003985 s_ip_idx = 0;
3986 ip_idx = 0;
Stephen Hemmingere21e8462010-03-20 16:09:01 -07003987 idev = __in6_dev_get(dev);
3988 if (!idev)
Eric Dumazet234b27c2009-11-12 04:11:50 +00003989 goto cont;
3990
3991 if (in6_dump_addrs(idev, skb, cb, type,
3992 s_ip_idx, &ip_idx) <= 0)
3993 goto done;
3994cont:
3995 idx++;
3996 }
3997 }
3998done:
3999 rcu_read_unlock();
4000 cb->args[0] = h;
4001 cb->args[1] = idx;
4002 cb->args[2] = ip_idx;
4003
Linus Torvalds1da177e2005-04-16 15:20:36 -07004004 return skb->len;
4005}
4006
4007static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
4008{
4009 enum addr_type_t type = UNICAST_ADDR;
Denis V. Lunevb8542722007-12-01 00:21:31 +11004010
Linus Torvalds1da177e2005-04-16 15:20:36 -07004011 return inet6_dump_addr(skb, cb, type);
4012}
4013
4014static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
4015{
4016 enum addr_type_t type = MULTICAST_ADDR;
Denis V. Lunevb8542722007-12-01 00:21:31 +11004017
Linus Torvalds1da177e2005-04-16 15:20:36 -07004018 return inet6_dump_addr(skb, cb, type);
4019}
4020
4021
4022static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
4023{
4024 enum addr_type_t type = ANYCAST_ADDR;
Denis V. Lunevb8542722007-12-01 00:21:31 +11004025
Linus Torvalds1da177e2005-04-16 15:20:36 -07004026 return inet6_dump_addr(skb, cb, type);
4027}
4028
Thomas Graf661d2962013-03-21 07:45:29 +00004029static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh)
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004030{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09004031 struct net *net = sock_net(in_skb->sk);
Thomas Graf1b29fc22006-09-18 00:10:50 -07004032 struct ifaddrmsg *ifm;
4033 struct nlattr *tb[IFA_MAX+1];
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004034 struct in6_addr *addr = NULL, *peer;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004035 struct net_device *dev = NULL;
4036 struct inet6_ifaddr *ifa;
4037 struct sk_buff *skb;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004038 int err;
4039
Thomas Graf1b29fc22006-09-18 00:10:50 -07004040 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
4041 if (err < 0)
4042 goto errout;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004043
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004044 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer);
Thomas Graf1b29fc22006-09-18 00:10:50 -07004045 if (addr == NULL) {
4046 err = -EINVAL;
4047 goto errout;
4048 }
4049
4050 ifm = nlmsg_data(nlh);
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004051 if (ifm->ifa_index)
Benjamin Thery6fda7352008-03-05 10:47:47 -08004052 dev = __dev_get_by_index(net, ifm->ifa_index);
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004053
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004054 ifa = ipv6_get_ifaddr(net, addr, dev, 1);
4055 if (!ifa) {
Thomas Graf1b29fc22006-09-18 00:10:50 -07004056 err = -EADDRNOTAVAIL;
4057 goto errout;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004058 }
4059
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004060 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL);
4061 if (!skb) {
Thomas Graf1b29fc22006-09-18 00:10:50 -07004062 err = -ENOBUFS;
4063 goto errout_ifa;
4064 }
4065
Eric W. Biederman15e47302012-09-07 20:12:54 +00004066 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).portid,
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004067 nlh->nlmsg_seq, RTM_NEWADDR, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08004068 if (err < 0) {
4069 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4070 WARN_ON(err == -EMSGSIZE);
4071 kfree_skb(skb);
4072 goto errout_ifa;
4073 }
Eric W. Biederman15e47302012-09-07 20:12:54 +00004074 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
Thomas Graf1b29fc22006-09-18 00:10:50 -07004075errout_ifa:
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004076 in6_ifa_put(ifa);
Thomas Graf1b29fc22006-09-18 00:10:50 -07004077errout:
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004078 return err;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004079}
4080
Linus Torvalds1da177e2005-04-16 15:20:36 -07004081static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
4082{
4083 struct sk_buff *skb;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09004084 struct net *net = dev_net(ifa->idev->dev);
Thomas Graf5d620262006-08-15 00:35:02 -07004085 int err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004086
Thomas Graf0ab68032006-09-18 00:12:35 -07004087 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
Thomas Graf5d620262006-08-15 00:35:02 -07004088 if (skb == NULL)
4089 goto errout;
4090
4091 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08004092 if (err < 0) {
4093 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4094 WARN_ON(err == -EMSGSIZE);
4095 kfree_skb(skb);
4096 goto errout;
4097 }
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -08004098 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
4099 return;
Thomas Graf5d620262006-08-15 00:35:02 -07004100errout:
4101 if (err < 0)
Benjamin Thery6fda7352008-03-05 10:47:47 -08004102 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004103}
4104
Dave Jonesb6f99a22007-03-22 12:27:49 -07004105static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004106 __s32 *array, int bytes)
4107{
Thomas Graf04561c12006-11-14 19:53:58 -08004108 BUG_ON(bytes < (DEVCONF_MAX * 4));
4109
Linus Torvalds1da177e2005-04-16 15:20:36 -07004110 memset(array, 0, bytes);
4111 array[DEVCONF_FORWARDING] = cnf->forwarding;
4112 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
4113 array[DEVCONF_MTU6] = cnf->mtu6;
4114 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
4115 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
4116 array[DEVCONF_AUTOCONF] = cnf->autoconf;
4117 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
4118 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
Thomas Graf93908d12010-11-17 01:44:24 +00004119 array[DEVCONF_RTR_SOLICIT_INTERVAL] =
4120 jiffies_to_msecs(cnf->rtr_solicit_interval);
4121 array[DEVCONF_RTR_SOLICIT_DELAY] =
4122 jiffies_to_msecs(cnf->rtr_solicit_delay);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004123 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
Hannes Frederic Sowafc4eba52013-08-14 01:03:46 +02004124 array[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL] =
4125 jiffies_to_msecs(cnf->mldv1_unsolicited_report_interval);
4126 array[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL] =
4127 jiffies_to_msecs(cnf->mldv2_unsolicited_report_interval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004128#ifdef CONFIG_IPV6_PRIVACY
4129 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
4130 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
4131 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
4132 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
4133 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
4134#endif
4135 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -08004136 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -08004137 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08004138#ifdef CONFIG_IPV6_ROUTER_PREF
4139 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
Thomas Graf93908d12010-11-17 01:44:24 +00004140 array[DEVCONF_RTR_PROBE_INTERVAL] =
4141 jiffies_to_msecs(cnf->rtr_probe_interval);
Neil Hormanfa03ef32007-01-30 14:30:10 -08004142#ifdef CONFIG_IPV6_ROUTE_INFO
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -08004143 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
4144#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08004145#endif
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -07004146 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -07004147 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
Neil Horman95c385b2007-04-25 17:08:10 -07004148#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4149 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
4150#endif
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09004151#ifdef CONFIG_IPV6_MROUTE
4152 array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding;
4153#endif
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +09004154 array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6;
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09004155 array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad;
Cosmin Ratiuc3faca02009-10-09 03:11:14 +00004156 array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao;
Hannes Frederic Sowa5cb04432012-11-06 16:46:20 +00004157 array[DEVCONF_NDISC_NOTIFY] = cnf->ndisc_notify;
Hannes Frederic Sowab800c3b2013-08-27 01:36:51 +02004158 array[DEVCONF_SUPPRESS_FRAG_NDISC] = cnf->suppress_frag_ndisc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004159}
4160
Thomas Grafb382b192010-11-16 04:33:57 +00004161static inline size_t inet6_ifla6_size(void)
4162{
4163 return nla_total_size(4) /* IFLA_INET6_FLAGS */
4164 + nla_total_size(sizeof(struct ifla_cacheinfo))
4165 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
4166 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004167 + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
4168 + nla_total_size(sizeof(struct in6_addr)); /* IFLA_INET6_TOKEN */
Thomas Grafb382b192010-11-16 04:33:57 +00004169}
4170
Thomas Graf339bf982006-11-10 14:10:15 -08004171static inline size_t inet6_if_nlmsg_size(void)
4172{
4173 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
4174 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
4175 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
4176 + nla_total_size(4) /* IFLA_MTU */
4177 + nla_total_size(4) /* IFLA_LINK */
Thomas Grafb382b192010-11-16 04:33:57 +00004178 + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
Thomas Graf339bf982006-11-10 14:10:15 -08004179}
YOSHIFUJI Hideakic5396a32006-06-17 22:48:48 -07004180
Eric Dumazetbe281e52011-05-19 01:14:23 +00004181static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib,
Tejun Heo7d720c32010-02-16 15:20:26 +00004182 int items, int bytes)
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004183{
4184 int i;
4185 int pad = bytes - sizeof(u64) * items;
4186 BUG_ON(pad < 0);
4187
4188 /* Use put_unaligned() because stats may not be aligned for u64. */
4189 put_unaligned(items, &stats[0]);
4190 for (i = 1; i < items; i++)
Eric Dumazetbe281e52011-05-19 01:14:23 +00004191 put_unaligned(atomic_long_read(&mib[i]), &stats[i]);
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004192
4193 memset(&stats[items], 0, pad);
4194}
4195
Eric Dumazet4ce3c182010-06-30 13:31:19 -07004196static inline void __snmp6_fill_stats64(u64 *stats, void __percpu **mib,
4197 int items, int bytes, size_t syncpoff)
4198{
4199 int i;
4200 int pad = bytes - sizeof(u64) * items;
4201 BUG_ON(pad < 0);
4202
4203 /* Use put_unaligned() because stats may not be aligned for u64. */
4204 put_unaligned(items, &stats[0]);
4205 for (i = 1; i < items; i++)
4206 put_unaligned(snmp_fold_field64(mib, i, syncpoff), &stats[i]);
4207
4208 memset(&stats[items], 0, pad);
4209}
4210
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004211static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
4212 int bytes)
4213{
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004214 switch (attrtype) {
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004215 case IFLA_INET6_STATS:
Eric Dumazet4ce3c182010-06-30 13:31:19 -07004216 __snmp6_fill_stats64(stats, (void __percpu **)idev->stats.ipv6,
4217 IPSTATS_MIB_MAX, bytes, offsetof(struct ipstats_mib, syncp));
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004218 break;
4219 case IFLA_INET6_ICMP6STATS:
Eric Dumazetbe281e52011-05-19 01:14:23 +00004220 __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, ICMP6_MIB_MAX, bytes);
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004221 break;
4222 }
4223}
4224
Thomas Grafb382b192010-11-16 04:33:57 +00004225static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004226{
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07004227 struct nlattr *nla;
Thomas Graf04561c12006-11-14 19:53:58 -08004228 struct ifla_cacheinfo ci;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004229
David S. Millerc78679e2012-04-01 20:27:33 -04004230 if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags))
4231 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004232 ci.max_reasm_len = IPV6_MAXPLEN;
David S. Miller24912422010-11-19 13:13:47 -08004233 ci.tstamp = cstamp_delta(idev->tstamp);
4234 ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time);
4235 ci.retrans_time = jiffies_to_msecs(idev->nd_parms->retrans_time);
David S. Millerc78679e2012-04-01 20:27:33 -04004236 if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci))
4237 goto nla_put_failure;
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07004238 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
4239 if (nla == NULL)
Thomas Graf04561c12006-11-14 19:53:58 -08004240 goto nla_put_failure;
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07004241 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004242
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07004243 /* XXX - MC not implemented */
4244
4245 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
4246 if (nla == NULL)
4247 goto nla_put_failure;
4248 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
4249
4250 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
4251 if (nla == NULL)
4252 goto nla_put_failure;
4253 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004254
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004255 nla = nla_reserve(skb, IFLA_INET6_TOKEN, sizeof(struct in6_addr));
4256 if (nla == NULL)
4257 goto nla_put_failure;
4258 read_lock_bh(&idev->lock);
4259 memcpy(nla_data(nla), idev->token.s6_addr, nla_len(nla));
4260 read_unlock_bh(&idev->lock);
4261
Thomas Grafb382b192010-11-16 04:33:57 +00004262 return 0;
4263
4264nla_put_failure:
4265 return -EMSGSIZE;
4266}
4267
4268static size_t inet6_get_link_af_size(const struct net_device *dev)
4269{
4270 if (!__in6_dev_get(dev))
4271 return 0;
4272
4273 return inet6_ifla6_size();
4274}
4275
4276static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev)
4277{
4278 struct inet6_dev *idev = __in6_dev_get(dev);
4279
4280 if (!idev)
4281 return -ENODATA;
4282
4283 if (inet6_fill_ifla6_attrs(skb, idev) < 0)
4284 return -EMSGSIZE;
4285
4286 return 0;
4287}
4288
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004289static int inet6_set_iftoken(struct inet6_dev *idev, struct in6_addr *token)
4290{
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004291 struct inet6_ifaddr *ifp;
4292 struct net_device *dev = idev->dev;
Daniel Borkmannfc403832013-04-09 03:47:15 +00004293 bool update_rs = false;
Hannes Frederic Sowadc848292013-06-24 21:42:40 +02004294 struct in6_addr ll_addr;
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004295
4296 if (token == NULL)
4297 return -EINVAL;
4298 if (ipv6_addr_any(token))
4299 return -EINVAL;
4300 if (dev->flags & (IFF_LOOPBACK | IFF_NOARP))
4301 return -EINVAL;
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004302 if (!ipv6_accept_ra(idev))
4303 return -EINVAL;
4304 if (idev->cnf.rtr_solicits <= 0)
4305 return -EINVAL;
4306
4307 write_lock_bh(&idev->lock);
4308
4309 BUILD_BUG_ON(sizeof(token->s6_addr) != 16);
4310 memcpy(idev->token.s6_addr + 8, token->s6_addr + 8, 8);
4311
4312 write_unlock_bh(&idev->lock);
4313
Hannes Frederic Sowadc848292013-06-24 21:42:40 +02004314 if (!idev->dead && (idev->if_flags & IF_READY) &&
4315 !ipv6_get_lladdr(dev, &ll_addr, IFA_F_TENTATIVE |
4316 IFA_F_OPTIMISTIC)) {
Daniel Borkmannfc403832013-04-09 03:47:15 +00004317
4318 /* If we're not ready, then normal ifup will take care
4319 * of this. Otherwise, we need to request our rs here.
4320 */
4321 ndisc_send_rs(dev, &ll_addr, &in6addr_linklocal_allrouters);
4322 update_rs = true;
4323 }
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004324
4325 write_lock_bh(&idev->lock);
Daniel Borkmannfc403832013-04-09 03:47:15 +00004326
Hannes Frederic Sowa77ecaac2013-06-26 03:41:49 +02004327 if (update_rs) {
Daniel Borkmannfc403832013-04-09 03:47:15 +00004328 idev->if_flags |= IF_RS_SENT;
Hannes Frederic Sowa77ecaac2013-06-26 03:41:49 +02004329 idev->rs_probes = 1;
4330 addrconf_mod_rs_timer(idev, idev->cnf.rtr_solicit_interval);
4331 }
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004332
4333 /* Well, that's kinda nasty ... */
4334 list_for_each_entry(ifp, &idev->addr_list, if_list) {
4335 spin_lock(&ifp->lock);
Daniel Borkmann617fe292013-04-09 03:47:16 +00004336 if (ifp->tokenized) {
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004337 ifp->valid_lft = 0;
4338 ifp->prefered_lft = 0;
4339 }
4340 spin_unlock(&ifp->lock);
4341 }
4342
4343 write_unlock_bh(&idev->lock);
Hannes Frederic Sowa2b9651d2013-06-24 22:03:28 +02004344 addrconf_verify(0);
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004345 return 0;
4346}
4347
4348static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla)
4349{
4350 int err = -EINVAL;
4351 struct inet6_dev *idev = __in6_dev_get(dev);
4352 struct nlattr *tb[IFLA_INET6_MAX + 1];
4353
4354 if (!idev)
4355 return -EAFNOSUPPORT;
4356
4357 if (nla_parse_nested(tb, IFLA_INET6_MAX, nla, NULL) < 0)
4358 BUG();
4359
4360 if (tb[IFLA_INET6_TOKEN])
4361 err = inet6_set_iftoken(idev, nla_data(tb[IFLA_INET6_TOKEN]));
4362
4363 return err;
4364}
4365
Thomas Grafb382b192010-11-16 04:33:57 +00004366static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004367 u32 portid, u32 seq, int event, unsigned int flags)
Thomas Grafb382b192010-11-16 04:33:57 +00004368{
4369 struct net_device *dev = idev->dev;
4370 struct ifinfomsg *hdr;
4371 struct nlmsghdr *nlh;
4372 void *protoinfo;
4373
Eric W. Biederman15e47302012-09-07 20:12:54 +00004374 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*hdr), flags);
Thomas Grafb382b192010-11-16 04:33:57 +00004375 if (nlh == NULL)
4376 return -EMSGSIZE;
4377
4378 hdr = nlmsg_data(nlh);
4379 hdr->ifi_family = AF_INET6;
4380 hdr->__ifi_pad = 0;
4381 hdr->ifi_type = dev->type;
4382 hdr->ifi_index = dev->ifindex;
4383 hdr->ifi_flags = dev_get_flags(dev);
4384 hdr->ifi_change = 0;
4385
David S. Millerc78679e2012-04-01 20:27:33 -04004386 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
4387 (dev->addr_len &&
4388 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
4389 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
4390 (dev->ifindex != dev->iflink &&
4391 nla_put_u32(skb, IFLA_LINK, dev->iflink)))
4392 goto nla_put_failure;
Thomas Grafb382b192010-11-16 04:33:57 +00004393 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
4394 if (protoinfo == NULL)
4395 goto nla_put_failure;
4396
4397 if (inet6_fill_ifla6_attrs(skb, idev) < 0)
4398 goto nla_put_failure;
4399
Thomas Graf04561c12006-11-14 19:53:58 -08004400 nla_nest_end(skb, protoinfo);
4401 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004402
Thomas Graf04561c12006-11-14 19:53:58 -08004403nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -08004404 nlmsg_cancel(skb, nlh);
4405 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004406}
4407
4408static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
4409{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09004410 struct net *net = sock_net(skb->sk);
Eric Dumazet84d26972009-11-09 12:11:28 +00004411 int h, s_h;
David S. Miller434a8a52009-11-11 18:53:00 -08004412 int idx = 0, s_idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004413 struct net_device *dev;
4414 struct inet6_dev *idev;
Eric Dumazet84d26972009-11-09 12:11:28 +00004415 struct hlist_head *head;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004416
Eric Dumazet84d26972009-11-09 12:11:28 +00004417 s_h = cb->args[0];
4418 s_idx = cb->args[1];
4419
4420 rcu_read_lock();
4421 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4422 idx = 0;
4423 head = &net->dev_index_head[h];
Sasha Levinb67bfe02013-02-27 17:06:00 -08004424 hlist_for_each_entry_rcu(dev, head, index_hlist) {
Eric Dumazet84d26972009-11-09 12:11:28 +00004425 if (idx < s_idx)
4426 goto cont;
4427 idev = __in6_dev_get(dev);
4428 if (!idev)
4429 goto cont;
4430 if (inet6_fill_ifinfo(skb, idev,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004431 NETLINK_CB(cb->skb).portid,
Eric Dumazet84d26972009-11-09 12:11:28 +00004432 cb->nlh->nlmsg_seq,
4433 RTM_NEWLINK, NLM_F_MULTI) <= 0)
4434 goto out;
Pavel Emelianov7562f872007-05-03 15:13:45 -07004435cont:
Eric Dumazet84d26972009-11-09 12:11:28 +00004436 idx++;
4437 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004438 }
Eric Dumazet84d26972009-11-09 12:11:28 +00004439out:
4440 rcu_read_unlock();
4441 cb->args[1] = idx;
4442 cb->args[0] = h;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004443
4444 return skb->len;
4445}
4446
4447void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
4448{
4449 struct sk_buff *skb;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09004450 struct net *net = dev_net(idev->dev);
Thomas Graf8d7a76c2006-08-15 00:35:47 -07004451 int err = -ENOBUFS;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004452
Thomas Graf339bf982006-11-10 14:10:15 -08004453 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
Thomas Graf8d7a76c2006-08-15 00:35:47 -07004454 if (skb == NULL)
4455 goto errout;
4456
4457 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08004458 if (err < 0) {
4459 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
4460 WARN_ON(err == -EMSGSIZE);
4461 kfree_skb(skb);
4462 goto errout;
4463 }
Nicolas Dichtel5f75a102010-12-07 23:38:31 +00004464 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC);
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -08004465 return;
Thomas Graf8d7a76c2006-08-15 00:35:47 -07004466errout:
4467 if (err < 0)
Nicolas Dichtel5f75a102010-12-07 23:38:31 +00004468 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004469}
4470
Thomas Graf339bf982006-11-10 14:10:15 -08004471static inline size_t inet6_prefix_nlmsg_size(void)
4472{
4473 return NLMSG_ALIGN(sizeof(struct prefixmsg))
4474 + nla_total_size(sizeof(struct in6_addr))
4475 + nla_total_size(sizeof(struct prefix_cacheinfo));
4476}
YOSHIFUJI Hideakic5396a32006-06-17 22:48:48 -07004477
Linus Torvalds1da177e2005-04-16 15:20:36 -07004478static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004479 struct prefix_info *pinfo, u32 portid, u32 seq,
Thomas Graf6051e2f2006-11-14 19:54:19 -08004480 int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004481{
Thomas Graf6051e2f2006-11-14 19:54:19 -08004482 struct prefixmsg *pmsg;
4483 struct nlmsghdr *nlh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004484 struct prefix_cacheinfo ci;
4485
Eric W. Biederman15e47302012-09-07 20:12:54 +00004486 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*pmsg), flags);
Thomas Graf6051e2f2006-11-14 19:54:19 -08004487 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -08004488 return -EMSGSIZE;
Thomas Graf6051e2f2006-11-14 19:54:19 -08004489
4490 pmsg = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004491 pmsg->prefix_family = AF_INET6;
Patrick McHardy8a470772005-06-28 12:56:45 -07004492 pmsg->prefix_pad1 = 0;
4493 pmsg->prefix_pad2 = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004494 pmsg->prefix_ifindex = idev->dev->ifindex;
4495 pmsg->prefix_len = pinfo->prefix_len;
4496 pmsg->prefix_type = pinfo->type;
Patrick McHardy8a470772005-06-28 12:56:45 -07004497 pmsg->prefix_pad3 = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004498 pmsg->prefix_flags = 0;
4499 if (pinfo->onlink)
4500 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
4501 if (pinfo->autoconf)
4502 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
4503
David S. Millerc78679e2012-04-01 20:27:33 -04004504 if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix))
4505 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004506 ci.preferred_time = ntohl(pinfo->prefered);
4507 ci.valid_time = ntohl(pinfo->valid);
David S. Millerc78679e2012-04-01 20:27:33 -04004508 if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci))
4509 goto nla_put_failure;
Thomas Graf6051e2f2006-11-14 19:54:19 -08004510 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004511
Thomas Graf6051e2f2006-11-14 19:54:19 -08004512nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -08004513 nlmsg_cancel(skb, nlh);
4514 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004515}
4516
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004517static void inet6_prefix_notify(int event, struct inet6_dev *idev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004518 struct prefix_info *pinfo)
4519{
4520 struct sk_buff *skb;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09004521 struct net *net = dev_net(idev->dev);
Thomas Graf8c384bfa2006-08-15 00:36:07 -07004522 int err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004523
Thomas Graf339bf982006-11-10 14:10:15 -08004524 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
Thomas Graf8c384bfa2006-08-15 00:36:07 -07004525 if (skb == NULL)
4526 goto errout;
4527
4528 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08004529 if (err < 0) {
4530 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
4531 WARN_ON(err == -EMSGSIZE);
4532 kfree_skb(skb);
4533 goto errout;
4534 }
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -08004535 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
4536 return;
Thomas Graf8c384bfa2006-08-15 00:36:07 -07004537errout:
4538 if (err < 0)
Benjamin Thery6fda7352008-03-05 10:47:47 -08004539 rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004540}
4541
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02004542static void update_valid_ll_addr_cnt(struct inet6_ifaddr *ifp, int count)
4543{
4544 write_lock_bh(&ifp->idev->lock);
4545 spin_lock(&ifp->lock);
4546 if (((ifp->flags & (IFA_F_PERMANENT|IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|
4547 IFA_F_DADFAILED)) == IFA_F_PERMANENT) &&
4548 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL))
4549 ifp->idev->valid_ll_addr_cnt += count;
4550 WARN_ON(ifp->idev->valid_ll_addr_cnt < 0);
4551 spin_unlock(&ifp->lock);
4552 write_unlock_bh(&ifp->idev->lock);
4553}
4554
Linus Torvalds1da177e2005-04-16 15:20:36 -07004555static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
4556{
Nicolas Dichtel63998ac2013-03-22 06:28:43 +00004557 struct net *net = dev_net(ifp->idev->dev);
4558
Linus Torvalds1da177e2005-04-16 15:20:36 -07004559 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
4560
4561 switch (event) {
4562 case RTM_NEWADDR:
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02004563 update_valid_ll_addr_cnt(ifp, 1);
4564
Neil Horman95c385b2007-04-25 17:08:10 -07004565 /*
4566 * If the address was optimistic
4567 * we inserted the route at the start of
4568 * our DAD process, so we don't need
4569 * to do it again
4570 */
4571 if (!(ifp->rt->rt6i_node))
4572 ip6_ins_rt(ifp->rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004573 if (ifp->idev->cnf.forwarding)
4574 addrconf_join_anycast(ifp);
Cong Wang7996c792013-05-22 05:41:06 +00004575 if (!ipv6_addr_any(&ifp->peer_addr))
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004576 addrconf_prefix_route(&ifp->peer_addr, 128,
4577 ifp->idev->dev, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004578 break;
4579 case RTM_DELADDR:
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02004580 update_valid_ll_addr_cnt(ifp, -1);
4581
Linus Torvalds1da177e2005-04-16 15:20:36 -07004582 if (ifp->idev->cnf.forwarding)
4583 addrconf_leave_anycast(ifp);
4584 addrconf_leave_solict(ifp->idev, &ifp->addr);
Cong Wang7996c792013-05-22 05:41:06 +00004585 if (!ipv6_addr_any(&ifp->peer_addr)) {
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004586 struct rt6_info *rt;
4587 struct net_device *dev = ifp->idev->dev;
4588
4589 rt = rt6_lookup(dev_net(dev), &ifp->peer_addr, NULL,
4590 dev->ifindex, 1);
4591 if (rt) {
4592 dst_hold(&rt->dst);
4593 if (ip6_del_rt(rt))
4594 dst_free(&rt->dst);
4595 }
4596 }
Changli Gaod8d1f302010-06-10 23:31:35 -07004597 dst_hold(&ifp->rt->dst);
stephen hemminger93fa1592010-04-12 05:41:31 +00004598
David S. Miller73a8bd72011-01-23 23:27:15 -08004599 if (ip6_del_rt(ifp->rt))
Changli Gaod8d1f302010-06-10 23:31:35 -07004600 dst_free(&ifp->rt->dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004601 break;
4602 }
Nicolas Dichtel63998ac2013-03-22 06:28:43 +00004603 atomic_inc(&net->ipv6.dev_addr_genid);
fan.du439677d2013-08-01 17:44:44 +08004604 rt_genid_bump_ipv6(net);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004605}
4606
4607static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
4608{
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07004609 rcu_read_lock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004610 if (likely(ifp->idev->dead == 0))
4611 __ipv6_ifa_notify(event, ifp);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07004612 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004613}
4614
4615#ifdef CONFIG_SYSCTL
4616
4617static
Joe Perchesfe2c6332013-06-11 23:04:25 -07004618int addrconf_sysctl_forward(struct ctl_table *ctl, int write,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004619 void __user *buffer, size_t *lenp, loff_t *ppos)
4620{
4621 int *valp = ctl->data;
4622 int val = *valp;
Eric W. Biederman88af1822010-02-19 13:22:59 +00004623 loff_t pos = *ppos;
Joe Perchesfe2c6332013-06-11 23:04:25 -07004624 struct ctl_table lctl;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004625 int ret;
4626
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00004627 /*
4628 * ctl->data points to idev->cnf.forwarding, we should
4629 * not modify it until we get the rtnl lock.
4630 */
4631 lctl = *ctl;
4632 lctl.data = &val;
4633
4634 ret = proc_dointvec(&lctl, write, buffer, lenp, ppos);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004635
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -08004636 if (write)
Stephen Hemmingerb325fdd2009-02-26 06:55:31 +00004637 ret = addrconf_fixup_forwarding(ctl, valp, val);
Eric W. Biederman88af1822010-02-19 13:22:59 +00004638 if (ret)
4639 *ppos = pos;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004640 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004641}
4642
Brian Haley56d417b2009-06-01 03:07:33 -07004643static void dev_disable_change(struct inet6_dev *idev)
4644{
Cong Wang75538c22013-05-29 11:30:50 +08004645 struct netdev_notifier_info info;
4646
Brian Haley56d417b2009-06-01 03:07:33 -07004647 if (!idev || !idev->dev)
4648 return;
4649
Cong Wang75538c22013-05-29 11:30:50 +08004650 netdev_notifier_info_init(&info, idev->dev);
Brian Haley56d417b2009-06-01 03:07:33 -07004651 if (idev->cnf.disable_ipv6)
Cong Wang75538c22013-05-29 11:30:50 +08004652 addrconf_notify(NULL, NETDEV_DOWN, &info);
Brian Haley56d417b2009-06-01 03:07:33 -07004653 else
Cong Wang75538c22013-05-29 11:30:50 +08004654 addrconf_notify(NULL, NETDEV_UP, &info);
Brian Haley56d417b2009-06-01 03:07:33 -07004655}
4656
4657static void addrconf_disable_change(struct net *net, __s32 newf)
4658{
4659 struct net_device *dev;
4660 struct inet6_dev *idev;
4661
Eric Dumazetc6d14c82009-11-04 05:43:23 -08004662 rcu_read_lock();
4663 for_each_netdev_rcu(net, dev) {
Brian Haley56d417b2009-06-01 03:07:33 -07004664 idev = __in6_dev_get(dev);
4665 if (idev) {
4666 int changed = (!idev->cnf.disable_ipv6) ^ (!newf);
4667 idev->cnf.disable_ipv6 = newf;
4668 if (changed)
4669 dev_disable_change(idev);
4670 }
Brian Haley56d417b2009-06-01 03:07:33 -07004671 }
Eric Dumazetc6d14c82009-11-04 05:43:23 -08004672 rcu_read_unlock();
Brian Haley56d417b2009-06-01 03:07:33 -07004673}
4674
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00004675static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf)
Brian Haley56d417b2009-06-01 03:07:33 -07004676{
4677 struct net *net;
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00004678 int old;
4679
4680 if (!rtnl_trylock())
4681 return restart_syscall();
Brian Haley56d417b2009-06-01 03:07:33 -07004682
4683 net = (struct net *)table->extra2;
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00004684 old = *p;
4685 *p = newf;
Brian Haley56d417b2009-06-01 03:07:33 -07004686
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00004687 if (p == &net->ipv6.devconf_dflt->disable_ipv6) {
4688 rtnl_unlock();
Brian Haley56d417b2009-06-01 03:07:33 -07004689 return 0;
Eric W. Biederman88af1822010-02-19 13:22:59 +00004690 }
Brian Haley56d417b2009-06-01 03:07:33 -07004691
4692 if (p == &net->ipv6.devconf_all->disable_ipv6) {
Brian Haley56d417b2009-06-01 03:07:33 -07004693 net->ipv6.devconf_dflt->disable_ipv6 = newf;
4694 addrconf_disable_change(net, newf);
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00004695 } else if ((!newf) ^ (!old))
Brian Haley56d417b2009-06-01 03:07:33 -07004696 dev_disable_change((struct inet6_dev *)table->extra1);
4697
4698 rtnl_unlock();
4699 return 0;
4700}
4701
4702static
Joe Perchesfe2c6332013-06-11 23:04:25 -07004703int addrconf_sysctl_disable(struct ctl_table *ctl, int write,
Brian Haley56d417b2009-06-01 03:07:33 -07004704 void __user *buffer, size_t *lenp, loff_t *ppos)
4705{
4706 int *valp = ctl->data;
4707 int val = *valp;
Eric W. Biederman88af1822010-02-19 13:22:59 +00004708 loff_t pos = *ppos;
Joe Perchesfe2c6332013-06-11 23:04:25 -07004709 struct ctl_table lctl;
Brian Haley56d417b2009-06-01 03:07:33 -07004710 int ret;
4711
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00004712 /*
4713 * ctl->data points to idev->cnf.disable_ipv6, we should
4714 * not modify it until we get the rtnl lock.
4715 */
4716 lctl = *ctl;
4717 lctl.data = &val;
4718
4719 ret = proc_dointvec(&lctl, write, buffer, lenp, ppos);
Brian Haley56d417b2009-06-01 03:07:33 -07004720
4721 if (write)
4722 ret = addrconf_disable_ipv6(ctl, valp, val);
Eric W. Biederman88af1822010-02-19 13:22:59 +00004723 if (ret)
4724 *ppos = pos;
Brian Haley56d417b2009-06-01 03:07:33 -07004725 return ret;
4726}
4727
Linus Torvalds1da177e2005-04-16 15:20:36 -07004728static struct addrconf_sysctl_table
4729{
4730 struct ctl_table_header *sysctl_header;
Joe Perchesfe2c6332013-06-11 23:04:25 -07004731 struct ctl_table addrconf_vars[DEVCONF_MAX+1];
Brian Haleyab32ea52006-09-22 14:15:41 -07004732} addrconf_sysctl __read_mostly = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004733 .sysctl_header = NULL,
4734 .addrconf_vars = {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09004735 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004736 .procname = "forwarding",
4737 .data = &ipv6_devconf.forwarding,
4738 .maxlen = sizeof(int),
4739 .mode = 0644,
4740 .proc_handler = addrconf_sysctl_forward,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004741 },
4742 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004743 .procname = "hop_limit",
4744 .data = &ipv6_devconf.hop_limit,
4745 .maxlen = sizeof(int),
4746 .mode = 0644,
4747 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004748 },
4749 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004750 .procname = "mtu",
4751 .data = &ipv6_devconf.mtu6,
4752 .maxlen = sizeof(int),
4753 .mode = 0644,
4754 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004755 },
4756 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004757 .procname = "accept_ra",
4758 .data = &ipv6_devconf.accept_ra,
4759 .maxlen = sizeof(int),
4760 .mode = 0644,
4761 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004762 },
4763 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004764 .procname = "accept_redirects",
4765 .data = &ipv6_devconf.accept_redirects,
4766 .maxlen = sizeof(int),
4767 .mode = 0644,
4768 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004769 },
4770 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004771 .procname = "autoconf",
4772 .data = &ipv6_devconf.autoconf,
4773 .maxlen = sizeof(int),
4774 .mode = 0644,
4775 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004776 },
4777 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004778 .procname = "dad_transmits",
4779 .data = &ipv6_devconf.dad_transmits,
4780 .maxlen = sizeof(int),
4781 .mode = 0644,
4782 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004783 },
4784 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004785 .procname = "router_solicitations",
4786 .data = &ipv6_devconf.rtr_solicits,
4787 .maxlen = sizeof(int),
4788 .mode = 0644,
4789 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004790 },
4791 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004792 .procname = "router_solicitation_interval",
4793 .data = &ipv6_devconf.rtr_solicit_interval,
4794 .maxlen = sizeof(int),
4795 .mode = 0644,
4796 .proc_handler = proc_dointvec_jiffies,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004797 },
4798 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004799 .procname = "router_solicitation_delay",
4800 .data = &ipv6_devconf.rtr_solicit_delay,
4801 .maxlen = sizeof(int),
4802 .mode = 0644,
4803 .proc_handler = proc_dointvec_jiffies,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004804 },
4805 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004806 .procname = "force_mld_version",
4807 .data = &ipv6_devconf.force_mld_version,
4808 .maxlen = sizeof(int),
4809 .mode = 0644,
4810 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004811 },
Hannes Frederic Sowafc4eba52013-08-14 01:03:46 +02004812 {
4813 .procname = "mldv1_unsolicited_report_interval",
4814 .data =
4815 &ipv6_devconf.mldv1_unsolicited_report_interval,
4816 .maxlen = sizeof(int),
4817 .mode = 0644,
4818 .proc_handler = proc_dointvec_ms_jiffies,
4819 },
4820 {
4821 .procname = "mldv2_unsolicited_report_interval",
4822 .data =
4823 &ipv6_devconf.mldv2_unsolicited_report_interval,
4824 .maxlen = sizeof(int),
4825 .mode = 0644,
4826 .proc_handler = proc_dointvec_ms_jiffies,
4827 },
Linus Torvalds1da177e2005-04-16 15:20:36 -07004828#ifdef CONFIG_IPV6_PRIVACY
4829 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004830 .procname = "use_tempaddr",
4831 .data = &ipv6_devconf.use_tempaddr,
4832 .maxlen = sizeof(int),
4833 .mode = 0644,
4834 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004835 },
4836 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004837 .procname = "temp_valid_lft",
4838 .data = &ipv6_devconf.temp_valid_lft,
4839 .maxlen = sizeof(int),
4840 .mode = 0644,
4841 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004842 },
4843 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004844 .procname = "temp_prefered_lft",
4845 .data = &ipv6_devconf.temp_prefered_lft,
4846 .maxlen = sizeof(int),
4847 .mode = 0644,
4848 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004849 },
4850 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004851 .procname = "regen_max_retry",
4852 .data = &ipv6_devconf.regen_max_retry,
4853 .maxlen = sizeof(int),
4854 .mode = 0644,
4855 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004856 },
4857 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004858 .procname = "max_desync_factor",
4859 .data = &ipv6_devconf.max_desync_factor,
4860 .maxlen = sizeof(int),
4861 .mode = 0644,
4862 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004863 },
4864#endif
4865 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004866 .procname = "max_addresses",
4867 .data = &ipv6_devconf.max_addresses,
4868 .maxlen = sizeof(int),
4869 .mode = 0644,
4870 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004871 },
4872 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004873 .procname = "accept_ra_defrtr",
4874 .data = &ipv6_devconf.accept_ra_defrtr,
4875 .maxlen = sizeof(int),
4876 .mode = 0644,
4877 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -08004878 },
4879 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004880 .procname = "accept_ra_pinfo",
4881 .data = &ipv6_devconf.accept_ra_pinfo,
4882 .maxlen = sizeof(int),
4883 .mode = 0644,
4884 .proc_handler = proc_dointvec,
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -08004885 },
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08004886#ifdef CONFIG_IPV6_ROUTER_PREF
4887 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004888 .procname = "accept_ra_rtr_pref",
4889 .data = &ipv6_devconf.accept_ra_rtr_pref,
4890 .maxlen = sizeof(int),
4891 .mode = 0644,
4892 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08004893 },
YOSHIFUJI Hideaki52e16352006-03-20 17:05:47 -08004894 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004895 .procname = "router_probe_interval",
4896 .data = &ipv6_devconf.rtr_probe_interval,
4897 .maxlen = sizeof(int),
4898 .mode = 0644,
4899 .proc_handler = proc_dointvec_jiffies,
YOSHIFUJI Hideaki52e16352006-03-20 17:05:47 -08004900 },
Neil Hormanfa03ef32007-01-30 14:30:10 -08004901#ifdef CONFIG_IPV6_ROUTE_INFO
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -08004902 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004903 .procname = "accept_ra_rt_info_max_plen",
4904 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
4905 .maxlen = sizeof(int),
4906 .mode = 0644,
4907 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -08004908 },
4909#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08004910#endif
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -08004911 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004912 .procname = "proxy_ndp",
4913 .data = &ipv6_devconf.proxy_ndp,
4914 .maxlen = sizeof(int),
4915 .mode = 0644,
4916 .proc_handler = proc_dointvec,
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -07004917 },
4918 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004919 .procname = "accept_source_route",
4920 .data = &ipv6_devconf.accept_source_route,
4921 .maxlen = sizeof(int),
4922 .mode = 0644,
4923 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -07004924 },
Neil Horman95c385b2007-04-25 17:08:10 -07004925#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4926 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004927 .procname = "optimistic_dad",
4928 .data = &ipv6_devconf.optimistic_dad,
4929 .maxlen = sizeof(int),
4930 .mode = 0644,
4931 .proc_handler = proc_dointvec,
Neil Horman95c385b2007-04-25 17:08:10 -07004932
4933 },
4934#endif
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09004935#ifdef CONFIG_IPV6_MROUTE
4936 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004937 .procname = "mc_forwarding",
4938 .data = &ipv6_devconf.mc_forwarding,
4939 .maxlen = sizeof(int),
4940 .mode = 0444,
4941 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09004942 },
4943#endif
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -07004944 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004945 .procname = "disable_ipv6",
4946 .data = &ipv6_devconf.disable_ipv6,
4947 .maxlen = sizeof(int),
4948 .mode = 0644,
4949 .proc_handler = addrconf_sysctl_disable,
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +09004950 },
4951 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004952 .procname = "accept_dad",
4953 .data = &ipv6_devconf.accept_dad,
4954 .maxlen = sizeof(int),
4955 .mode = 0644,
4956 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09004957 },
4958 {
Octavian Purdilaf7734fd2009-10-02 11:39:15 +00004959 .procname = "force_tllao",
4960 .data = &ipv6_devconf.force_tllao,
4961 .maxlen = sizeof(int),
4962 .mode = 0644,
4963 .proc_handler = proc_dointvec
4964 },
4965 {
Hannes Frederic Sowa5cb04432012-11-06 16:46:20 +00004966 .procname = "ndisc_notify",
4967 .data = &ipv6_devconf.ndisc_notify,
4968 .maxlen = sizeof(int),
4969 .mode = 0644,
4970 .proc_handler = proc_dointvec
4971 },
4972 {
Hannes Frederic Sowab800c3b2013-08-27 01:36:51 +02004973 .procname = "suppress_frag_ndisc",
4974 .data = &ipv6_devconf.suppress_frag_ndisc,
4975 .maxlen = sizeof(int),
4976 .mode = 0644,
4977 .proc_handler = proc_dointvec
4978 },
4979 {
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08004980 /* sentinel */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004981 }
4982 },
Linus Torvalds1da177e2005-04-16 15:20:36 -07004983};
4984
Pavel Emelyanovbff16c22008-01-10 17:42:13 -08004985static int __addrconf_sysctl_register(struct net *net, char *dev_name,
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08004986 struct inet6_dev *idev, struct ipv6_devconf *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004987{
4988 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004989 struct addrconf_sysctl_table *t;
Eric W. Biederman6105e292012-04-19 13:41:24 +00004990 char path[sizeof("net/ipv6/conf/") + IFNAMSIZ];
Pavel Emelyanov1dab6222007-12-02 00:59:38 +11004991
Arnaldo Carvalho de Meloaf879cc2006-11-17 12:14:37 -02004992 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004993 if (t == NULL)
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11004994 goto out;
4995
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07004996 for (i = 0; t->addrconf_vars[i].data; i++) {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004997 t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004998 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
Pavel Emelyanovbff16c22008-01-10 17:42:13 -08004999 t->addrconf_vars[i].extra2 = net;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005000 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005001
Eric W. Biederman6105e292012-04-19 13:41:24 +00005002 snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005003
Eric W. Biederman6105e292012-04-19 13:41:24 +00005004 t->sysctl_header = register_net_sysctl(net, path, t->addrconf_vars);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005005 if (t->sysctl_header == NULL)
Eric W. Biederman6105e292012-04-19 13:41:24 +00005006 goto free;
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11005007
5008 p->sysctl = t;
Pavel Emelyanov95897312008-01-10 17:41:45 -08005009 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005010
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11005011free:
Linus Torvalds1da177e2005-04-16 15:20:36 -07005012 kfree(t);
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11005013out:
Pavel Emelyanov95897312008-01-10 17:41:45 -08005014 return -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005015}
5016
Pavel Emelyanov408c4762008-01-10 17:41:21 -08005017static void __addrconf_sysctl_unregister(struct ipv6_devconf *p)
5018{
5019 struct addrconf_sysctl_table *t;
5020
5021 if (p->sysctl == NULL)
5022 return;
5023
5024 t = p->sysctl;
5025 p->sysctl = NULL;
Lucian Adrian Grijincuff538812011-05-01 01:44:01 +00005026 unregister_net_sysctl_table(t->sysctl_header);
Pavel Emelyanov408c4762008-01-10 17:41:21 -08005027 kfree(t);
5028}
5029
Pavel Emelyanovf52295a2007-12-02 00:58:37 +11005030static void addrconf_sysctl_register(struct inet6_dev *idev)
5031{
Eric W. Biederman54716e32010-02-14 03:27:03 +00005032 neigh_sysctl_register(idev->dev, idev->nd_parms, "ipv6",
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08005033 &ndisc_ifinfo_sysctl_change);
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09005034 __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name,
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08005035 idev, &idev->cnf);
Pavel Emelyanovf52295a2007-12-02 00:58:37 +11005036}
5037
Pavel Emelyanov408c4762008-01-10 17:41:21 -08005038static void addrconf_sysctl_unregister(struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005039{
Pavel Emelyanov408c4762008-01-10 17:41:21 -08005040 __addrconf_sysctl_unregister(&idev->cnf);
5041 neigh_sysctl_unregister(idev->nd_parms);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005042}
5043
5044
5045#endif
5046
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00005047static int __net_init addrconf_init_net(struct net *net)
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005048{
Hong Zhiguoa79ca222013-03-26 01:52:45 +08005049 int err = -ENOMEM;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005050 struct ipv6_devconf *all, *dflt;
5051
Hong Zhiguoa79ca222013-03-26 01:52:45 +08005052 all = kmemdup(&ipv6_devconf, sizeof(ipv6_devconf), GFP_KERNEL);
5053 if (all == NULL)
5054 goto err_alloc_all;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005055
Hong Zhiguoa79ca222013-03-26 01:52:45 +08005056 dflt = kmemdup(&ipv6_devconf_dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL);
5057 if (dflt == NULL)
5058 goto err_alloc_dflt;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005059
Hong Zhiguoa79ca222013-03-26 01:52:45 +08005060 /* these will be inherited by all namespaces */
5061 dflt->autoconf = ipv6_defaults.autoconf;
5062 dflt->disable_ipv6 = ipv6_defaults.disable_ipv6;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005063
5064 net->ipv6.devconf_all = all;
5065 net->ipv6.devconf_dflt = dflt;
5066
5067#ifdef CONFIG_SYSCTL
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08005068 err = __addrconf_sysctl_register(net, "all", NULL, all);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005069 if (err < 0)
5070 goto err_reg_all;
5071
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08005072 err = __addrconf_sysctl_register(net, "default", NULL, dflt);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005073 if (err < 0)
5074 goto err_reg_dflt;
5075#endif
5076 return 0;
5077
5078#ifdef CONFIG_SYSCTL
5079err_reg_dflt:
5080 __addrconf_sysctl_unregister(all);
5081err_reg_all:
5082 kfree(dflt);
5083#endif
5084err_alloc_dflt:
5085 kfree(all);
5086err_alloc_all:
5087 return err;
5088}
5089
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00005090static void __net_exit addrconf_exit_net(struct net *net)
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005091{
5092#ifdef CONFIG_SYSCTL
5093 __addrconf_sysctl_unregister(net->ipv6.devconf_dflt);
5094 __addrconf_sysctl_unregister(net->ipv6.devconf_all);
5095#endif
Octavian Purdila09ad9bc2009-11-25 15:14:13 -08005096 if (!net_eq(net, &init_net)) {
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005097 kfree(net->ipv6.devconf_dflt);
5098 kfree(net->ipv6.devconf_all);
5099 }
5100}
5101
5102static struct pernet_operations addrconf_ops = {
5103 .init = addrconf_init_net,
5104 .exit = addrconf_exit_net,
5105};
5106
Thomas Grafb382b192010-11-16 04:33:57 +00005107static struct rtnl_af_ops inet6_ops = {
5108 .family = AF_INET6,
5109 .fill_link_af = inet6_fill_link_af,
5110 .get_link_af_size = inet6_get_link_af_size,
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005111 .set_link_af = inet6_set_link_af,
Thomas Grafb382b192010-11-16 04:33:57 +00005112};
5113
Linus Torvalds1da177e2005-04-16 15:20:36 -07005114/*
5115 * Init / cleanup code
5116 */
5117
5118int __init addrconf_init(void)
5119{
stephen hemmingerc2e21292010-03-17 20:31:10 +00005120 int i, err;
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +09005121
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005122 err = ipv6_addr_label_init();
5123 if (err < 0) {
Joe Perchesf3213832012-05-15 14:11:53 +00005124 pr_crit("%s: cannot initialize default policy table: %d\n",
5125 __func__, err);
Neil Horman2cc6d2b2010-09-24 09:55:52 +00005126 goto out;
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +09005127 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005128
Neil Horman2cc6d2b2010-09-24 09:55:52 +00005129 err = register_pernet_subsys(&addrconf_ops);
5130 if (err < 0)
5131 goto out_addrlabel;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005132
Linus Torvalds1da177e2005-04-16 15:20:36 -07005133 /* The addrconf netdev notifier requires that loopback_dev
5134 * has it's ipv6 private information allocated and setup
5135 * before it can bring up and give link-local addresses
5136 * to other devices which are up.
5137 *
5138 * Unfortunately, loopback_dev is not necessarily the first
5139 * entry in the global dev_base list of net devices. In fact,
5140 * it is likely to be the very last entry on that list.
5141 * So this causes the notifier registry below to try and
5142 * give link-local addresses to all devices besides loopback_dev
5143 * first, then loopback_dev, which cases all the non-loopback_dev
5144 * devices to fail to get a link-local address.
5145 *
5146 * So, as a temporary fix, allocate the ipv6 structure for
5147 * loopback_dev first by hand.
5148 * Longer term, all of the dependencies ipv6 has upon the loopback
5149 * device and it being up should be removed.
5150 */
5151 rtnl_lock();
Eric W. Biederman2774c7a2007-09-26 22:10:56 -07005152 if (!ipv6_add_dev(init_net.loopback_dev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07005153 err = -ENOMEM;
5154 rtnl_unlock();
5155 if (err)
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005156 goto errlo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005157
stephen hemmingerc2e21292010-03-17 20:31:10 +00005158 for (i = 0; i < IN6_ADDR_HSIZE; i++)
5159 INIT_HLIST_HEAD(&inet6_addr_lst[i]);
5160
Linus Torvalds1da177e2005-04-16 15:20:36 -07005161 register_netdevice_notifier(&ipv6_dev_notf);
5162
Linus Torvalds1da177e2005-04-16 15:20:36 -07005163 addrconf_verify(0);
Thomas Grafc127ea22007-03-22 11:58:32 -07005164
Thomas Grafb382b192010-11-16 04:33:57 +00005165 err = rtnl_af_register(&inet6_ops);
5166 if (err < 0)
5167 goto errout_af;
5168
Greg Rosec7ac8672011-06-10 01:27:09 +00005169 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo,
5170 NULL);
Thomas Grafc127ea22007-03-22 11:58:32 -07005171 if (err < 0)
5172 goto errout;
5173
5174 /* Only the first call to __rtnl_register can fail */
Greg Rosec7ac8672011-06-10 01:27:09 +00005175 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL);
5176 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL);
5177 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr,
5178 inet6_dump_ifaddr, NULL);
5179 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL,
5180 inet6_dump_ifmcaddr, NULL);
5181 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL,
5182 inet6_dump_ifacaddr, NULL);
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +00005183 __rtnl_register(PF_INET6, RTM_GETNETCONF, inet6_netconf_get_devconf,
Nicolas Dichtel7a674202013-03-05 23:42:06 +00005184 inet6_netconf_dump_devconf, NULL);
Thomas Grafc127ea22007-03-22 11:58:32 -07005185
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +09005186 ipv6_addr_label_rtnl_register();
5187
Linus Torvalds1da177e2005-04-16 15:20:36 -07005188 return 0;
Thomas Grafc127ea22007-03-22 11:58:32 -07005189errout:
Thomas Grafb382b192010-11-16 04:33:57 +00005190 rtnl_af_unregister(&inet6_ops);
5191errout_af:
Thomas Grafc127ea22007-03-22 11:58:32 -07005192 unregister_netdevice_notifier(&ipv6_dev_notf);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005193errlo:
5194 unregister_pernet_subsys(&addrconf_ops);
Neil Horman2cc6d2b2010-09-24 09:55:52 +00005195out_addrlabel:
5196 ipv6_addr_label_cleanup();
5197out:
Thomas Grafc127ea22007-03-22 11:58:32 -07005198 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005199}
5200
Daniel Lezcano09f77092007-12-13 05:34:58 -08005201void addrconf_cleanup(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005202{
Daniel Lezcano176c39a2009-03-03 01:06:45 -08005203 struct net_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005204 int i;
5205
5206 unregister_netdevice_notifier(&ipv6_dev_notf);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005207 unregister_pernet_subsys(&addrconf_ops);
Neil Horman2cc6d2b2010-09-24 09:55:52 +00005208 ipv6_addr_label_cleanup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07005209
5210 rtnl_lock();
5211
Thomas Grafb382b192010-11-16 04:33:57 +00005212 __rtnl_af_unregister(&inet6_ops);
5213
Daniel Lezcano176c39a2009-03-03 01:06:45 -08005214 /* clean dev list */
5215 for_each_netdev(&init_net, dev) {
5216 if (__in6_dev_get(dev) == NULL)
5217 continue;
5218 addrconf_ifdown(dev, 1);
5219 }
5220 addrconf_ifdown(init_net.loopback_dev, 2);
5221
Linus Torvalds1da177e2005-04-16 15:20:36 -07005222 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07005223 * Check hash table.
5224 */
stephen hemminger5c578ae2010-03-17 20:31:11 +00005225 spin_lock_bh(&addrconf_hash_lock);
stephen hemmingerc2e21292010-03-17 20:31:10 +00005226 for (i = 0; i < IN6_ADDR_HSIZE; i++)
5227 WARN_ON(!hlist_empty(&inet6_addr_lst[i]));
stephen hemminger5c578ae2010-03-17 20:31:11 +00005228 spin_unlock_bh(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005229
5230 del_timer(&addr_chk_timer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005231 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07005232}