blob: 030fefdc9aed8cedbf8ba9e26864de0aca89236a [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>
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +010049#include <linux/inet.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070050#include <linux/in6.h>
51#include <linux/netdevice.h>
Thomas Graf18237302006-08-04 23:04:54 -070052#include <linux/if_addr.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070053#include <linux/if_arp.h>
54#include <linux/if_arcnet.h>
55#include <linux/if_infiniband.h>
56#include <linux/route.h>
57#include <linux/inetdevice.h>
58#include <linux/init.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090059#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#ifdef CONFIG_SYSCTL
61#include <linux/sysctl.h>
62#endif
Randy Dunlap4fc268d2006-01-11 12:17:47 -080063#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070064#include <linux/delay.h>
65#include <linux/notifier.h>
Paulo Marques543537b2005-06-23 00:09:02 -070066#include <linux/string.h>
Eric Dumazetddbe5032012-07-18 08:11:12 +000067#include <linux/hash.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
Eric W. Biederman457c4cb2007-09-12 12:01:34 +020069#include <net/net_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070070#include <net/sock.h>
71#include <net/snmp.h>
72
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +000073#include <net/af_ieee802154.h>
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +000074#include <net/firewire.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070075#include <net/ipv6.h>
76#include <net/protocol.h>
77#include <net/ndisc.h>
78#include <net/ip6_route.h>
79#include <net/addrconf.h>
80#include <net/tcp.h>
81#include <net/ip.h>
Thomas Graf5d620262006-08-15 00:35:02 -070082#include <net/netlink.h>
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -070083#include <net/pkt_sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070084#include <linux/if_tunnel.h>
85#include <linux/rtnetlink.h>
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +000086#include <linux/netconf.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070087#include <linux/random.h>
Stephen Hemmingere21e8462010-03-20 16:09:01 -070088#include <linux/uaccess.h>
Herbert Xu7f7d9a62007-04-24 21:54:09 -070089#include <asm/unaligned.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
91#include <linux/proc_fs.h>
92#include <linux/seq_file.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040093#include <linux/export.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070094
95/* Set to 3 to get tracing... */
96#define ACONF_DEBUG 2
97
98#if ACONF_DEBUG >= 3
dingtianhongba3542e2013-08-17 10:27:04 +080099#define ADBG(fmt, ...) printk(fmt, ##__VA_ARGS__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100#else
dingtianhongba3542e2013-08-17 10:27:04 +0800101#define ADBG(fmt, ...) do { if (0) printk(fmt, ##__VA_ARGS__); } while (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102#endif
103
104#define INFINITY_LIFE_TIME 0xFFFFFFFF
Thomas Graf18a31e12010-11-17 04:12:02 +0000105
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +0100106#define IPV6_MAX_STRLEN \
107 sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255")
108
Thomas Graf18a31e12010-11-17 04:12:02 +0000109static 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
WANG Conga317a2f2014-07-25 15:25:09 -0700115static int 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
WANG Conga317a2f2014-07-25 15:25:09 -0700118static inline int addrconf_sysctl_register(struct inet6_dev *idev)
Pavel Emelyanov408c4762008-01-10 17:41:21 -0800119{
WANG Conga317a2f2014-07-25 15:25:09 -0700120 return 0;
Pavel Emelyanov408c4762008-01-10 17:41:21 -0800121}
122
123static inline void addrconf_sysctl_unregister(struct inet6_dev *idev)
124{
125}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126#endif
127
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
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900132static int ipv6_generate_eui64(u8 *eui, struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133static int ipv6_count_addresses(struct inet6_dev *idev);
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +0100134static int ipv6_generate_stable_address(struct in6_addr *addr,
135 u8 dad_count,
136 const struct inet6_dev *idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137
138/*
139 * Configured unicast address hash table
140 */
stephen hemmingerc2e21292010-03-17 20:31:10 +0000141static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE];
stephen hemminger5c578aed2010-03-17 20:31:11 +0000142static DEFINE_SPINLOCK(addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +0100144static void addrconf_verify(void);
145static void addrconf_verify_rtnl(void);
146static void addrconf_verify_work(struct work_struct *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +0100148static struct workqueue_struct *addrconf_wq;
149static DECLARE_DELAYED_WORK(addr_chk_work, addrconf_verify_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
151static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
152static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
153
Jiri Pirko93d9b7d2010-03-10 10:28:56 +0000154static void addrconf_type_change(struct net_device *dev,
155 unsigned long event);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156static int addrconf_ifdown(struct net_device *dev, int how);
157
Romain Kuntz21caa662013-01-09 21:06:03 +0000158static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx,
159 int plen,
160 const struct net_device *dev,
161 u32 flags, u32 noflags);
162
David S. Millercf22f9a2012-04-14 21:37:40 -0400163static void addrconf_dad_start(struct inet6_ifaddr *ifp);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +0100164static void addrconf_dad_work(struct work_struct *w);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +0900166static void addrconf_dad_run(struct inet6_dev *idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167static void addrconf_rs_timer(unsigned long data);
168static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
169static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
170
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900171static void inet6_prefix_notify(int event, struct inet6_dev *idev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 struct prefix_info *pinfo);
David S. Miller3e81c6d2010-03-20 16:18:00 -0700173static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
174 struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175
Adrian Bunk888c8482008-07-22 14:21:58 -0700176static struct ipv6_devconf ipv6_devconf __read_mostly = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 .forwarding = 0,
178 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
179 .mtu6 = IPV6_MIN_MTU,
180 .accept_ra = 1,
181 .accept_redirects = 1,
182 .autoconf = 1,
183 .force_mld_version = 0,
Hannes Frederic Sowafc4eba52013-08-14 01:03:46 +0200184 .mldv1_unsolicited_report_interval = 10 * HZ,
185 .mldv2_unsolicited_report_interval = HZ,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 .dad_transmits = 1,
187 .rtr_solicits = MAX_RTR_SOLICITATIONS,
188 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
189 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
Ian Morris67ba4152014-08-24 21:53:10 +0100190 .use_tempaddr = 0,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 .temp_valid_lft = TEMP_VALID_LIFETIME,
192 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
193 .regen_max_retry = REGEN_MAX_RETRY,
194 .max_desync_factor = MAX_DESYNC_FACTOR,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 .max_addresses = IPV6_MAX_ADDRESSES,
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -0800196 .accept_ra_defrtr = 1,
Ben Greeard9333192014-06-25 14:44:53 -0700197 .accept_ra_from_local = 0,
Hangbin Liu8013d1d2015-07-30 14:28:42 +0800198 .accept_ra_min_hop_limit= 1,
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -0800199 .accept_ra_pinfo = 1,
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800200#ifdef CONFIG_IPV6_ROUTER_PREF
201 .accept_ra_rtr_pref = 1,
YOSHIFUJI Hideaki52e163562006-03-20 17:05:47 -0800202 .rtr_probe_interval = 60 * HZ,
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -0800203#ifdef CONFIG_IPV6_ROUTE_INFO
204 .accept_ra_rt_info_max_plen = 0,
205#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800206#endif
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -0700207 .proxy_ndp = 0,
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -0700208 .accept_source_route = 0, /* we do not accept RH0 by default. */
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +0900209 .disable_ipv6 = 0,
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900210 .accept_dad = 1,
Hannes Frederic Sowab800c3b2013-08-27 01:36:51 +0200211 .suppress_frag_ndisc = 1,
Harout Hedeshianc2943f12015-01-20 10:06:05 -0700212 .accept_ra_mtu = 1,
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +0100213 .stable_secret = {
214 .initialized = false,
Erik Kline3985e8a2015-07-22 16:38:25 +0900215 },
216 .use_oif_addrs_only = 0,
Andy Gospodarek35103d12015-08-13 10:39:01 -0400217 .ignore_routes_with_linkdown = 0,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218};
219
Brian Haleyab32ea52006-09-22 14:15:41 -0700220static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 .forwarding = 0,
222 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
223 .mtu6 = IPV6_MIN_MTU,
224 .accept_ra = 1,
225 .accept_redirects = 1,
226 .autoconf = 1,
Hannes Frederic Sowafc4eba52013-08-14 01:03:46 +0200227 .force_mld_version = 0,
228 .mldv1_unsolicited_report_interval = 10 * HZ,
229 .mldv2_unsolicited_report_interval = HZ,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 .dad_transmits = 1,
231 .rtr_solicits = MAX_RTR_SOLICITATIONS,
232 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
233 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 .use_tempaddr = 0,
235 .temp_valid_lft = TEMP_VALID_LIFETIME,
236 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
237 .regen_max_retry = REGEN_MAX_RETRY,
238 .max_desync_factor = MAX_DESYNC_FACTOR,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 .max_addresses = IPV6_MAX_ADDRESSES,
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -0800240 .accept_ra_defrtr = 1,
Ben Greeard9333192014-06-25 14:44:53 -0700241 .accept_ra_from_local = 0,
Hangbin Liu8013d1d2015-07-30 14:28:42 +0800242 .accept_ra_min_hop_limit= 1,
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -0800243 .accept_ra_pinfo = 1,
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800244#ifdef CONFIG_IPV6_ROUTER_PREF
245 .accept_ra_rtr_pref = 1,
YOSHIFUJI Hideaki52e163562006-03-20 17:05:47 -0800246 .rtr_probe_interval = 60 * HZ,
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -0800247#ifdef CONFIG_IPV6_ROUTE_INFO
248 .accept_ra_rt_info_max_plen = 0,
249#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800250#endif
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -0700251 .proxy_ndp = 0,
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -0700252 .accept_source_route = 0, /* we do not accept RH0 by default. */
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +0900253 .disable_ipv6 = 0,
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900254 .accept_dad = 1,
Hannes Frederic Sowab800c3b2013-08-27 01:36:51 +0200255 .suppress_frag_ndisc = 1,
Harout Hedeshianc2943f12015-01-20 10:06:05 -0700256 .accept_ra_mtu = 1,
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +0100257 .stable_secret = {
258 .initialized = false,
259 },
Erik Kline3985e8a2015-07-22 16:38:25 +0900260 .use_oif_addrs_only = 0,
Andy Gospodarek35103d12015-08-13 10:39:01 -0400261 .ignore_routes_with_linkdown = 0,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262};
263
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -0700264/* Check if a valid qdisc is available */
David S. Miller05297942008-07-08 23:01:27 -0700265static inline bool addrconf_qdisc_ok(const struct net_device *dev)
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -0700266{
David S. Miller05297942008-07-08 23:01:27 -0700267 return !qdisc_tx_is_noop(dev);
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -0700268}
269
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200270static void addrconf_del_rs_timer(struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271{
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200272 if (del_timer(&idev->rs_timer))
273 __in6_dev_put(idev);
274}
275
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +0100276static void addrconf_del_dad_work(struct inet6_ifaddr *ifp)
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200277{
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +0100278 if (cancel_delayed_work(&ifp->dad_work))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 __in6_ifa_put(ifp);
280}
281
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200282static void addrconf_mod_rs_timer(struct inet6_dev *idev,
283 unsigned long when)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284{
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200285 if (!timer_pending(&idev->rs_timer))
286 in6_dev_hold(idev);
287 mod_timer(&idev->rs_timer, jiffies + when);
288}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +0100290static void addrconf_mod_dad_work(struct inet6_ifaddr *ifp,
291 unsigned long delay)
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200292{
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +0100293 if (!delayed_work_pending(&ifp->dad_work))
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200294 in6_ifa_hold(ifp);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +0100295 mod_delayed_work(addrconf_wq, &ifp->dad_work, delay);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296}
297
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700298static int snmp6_alloc_dev(struct inet6_dev *idev)
299{
John Stultz827da442013-10-07 15:51:58 -0700300 int i;
301
WANG Cong698365f2014-05-05 15:55:55 -0700302 idev->stats.ipv6 = alloc_percpu(struct ipstats_mib);
303 if (!idev->stats.ipv6)
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700304 goto err_ip;
John Stultz827da442013-10-07 15:51:58 -0700305
306 for_each_possible_cpu(i) {
307 struct ipstats_mib *addrconf_stats;
WANG Cong698365f2014-05-05 15:55:55 -0700308 addrconf_stats = per_cpu_ptr(idev->stats.ipv6, i);
John Stultz827da442013-10-07 15:51:58 -0700309 u64_stats_init(&addrconf_stats->syncp);
John Stultz827da442013-10-07 15:51:58 -0700310 }
311
312
Eric Dumazetbe281e52011-05-19 01:14:23 +0000313 idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device),
314 GFP_KERNEL);
315 if (!idev->stats.icmpv6dev)
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700316 goto err_icmp;
Eric Dumazetbe281e52011-05-19 01:14:23 +0000317 idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device),
318 GFP_KERNEL);
319 if (!idev->stats.icmpv6msgdev)
David L Stevens14878f72007-09-16 16:52:35 -0700320 goto err_icmpmsg;
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700321
322 return 0;
323
David L Stevens14878f72007-09-16 16:52:35 -0700324err_icmpmsg:
Eric Dumazetbe281e52011-05-19 01:14:23 +0000325 kfree(idev->stats.icmpv6dev);
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700326err_icmp:
WANG Cong698365f2014-05-05 15:55:55 -0700327 free_percpu(idev->stats.ipv6);
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700328err_ip:
Pavel Emelyanovaaf70ec2007-10-17 21:25:32 -0700329 return -ENOMEM;
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700330}
331
Eldad Zack8e5e8f32012-04-01 07:49:08 +0000332static struct inet6_dev *ipv6_add_dev(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333{
334 struct inet6_dev *ndev;
WANG Conga317a2f2014-07-25 15:25:09 -0700335 int err = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336
337 ASSERT_RTNL();
338
339 if (dev->mtu < IPV6_MIN_MTU)
WANG Conga317a2f2014-07-25 15:25:09 -0700340 return ERR_PTR(-EINVAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900342 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
Ian Morris63159f22015-03-29 14:00:04 +0100343 if (!ndev)
WANG Conga317a2f2014-07-25 15:25:09 -0700344 return ERR_PTR(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345
Ingo Oeser322f74a2006-03-20 23:01:47 -0800346 rwlock_init(&ndev->lock);
347 ndev->dev = dev;
stephen hemminger502a2ff2010-03-17 20:31:13 +0000348 INIT_LIST_HEAD(&ndev->addr_list);
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200349 setup_timer(&ndev->rs_timer, addrconf_rs_timer,
350 (unsigned long)ndev);
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900351 memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf));
Ingo Oeser322f74a2006-03-20 23:01:47 -0800352 ndev->cnf.mtu6 = dev->mtu;
353 ndev->cnf.sysctl = NULL;
354 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
Ian Morris63159f22015-03-29 14:00:04 +0100355 if (!ndev->nd_parms) {
Ingo Oeser322f74a2006-03-20 23:01:47 -0800356 kfree(ndev);
WANG Conga317a2f2014-07-25 15:25:09 -0700357 return ERR_PTR(err);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800358 }
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700359 if (ndev->cnf.forwarding)
360 dev_disable_lro(dev);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800361 /* We refer to the device */
362 dev_hold(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363
Ingo Oeser322f74a2006-03-20 23:01:47 -0800364 if (snmp6_alloc_dev(ndev) < 0) {
dingtianhongba3542e2013-08-17 10:27:04 +0800365 ADBG(KERN_WARNING
Joe Perchesf3213832012-05-15 14:11:53 +0000366 "%s: cannot allocate memory for statistics; dev=%s.\n",
dingtianhongba3542e2013-08-17 10:27:04 +0800367 __func__, dev->name);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800368 neigh_parms_release(&nd_tbl, ndev->nd_parms);
Roy Li8603e332011-09-20 15:10:16 -0400369 dev_put(dev);
370 kfree(ndev);
WANG Conga317a2f2014-07-25 15:25:09 -0700371 return ERR_PTR(err);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800372 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373
Ingo Oeser322f74a2006-03-20 23:01:47 -0800374 if (snmp6_register_dev(ndev) < 0) {
dingtianhongba3542e2013-08-17 10:27:04 +0800375 ADBG(KERN_WARNING
Joe Perchesf3213832012-05-15 14:11:53 +0000376 "%s: cannot create /proc/net/dev_snmp6/%s\n",
dingtianhongba3542e2013-08-17 10:27:04 +0800377 __func__, dev->name);
WANG Conga317a2f2014-07-25 15:25:09 -0700378 goto err_release;
Ingo Oeser322f74a2006-03-20 23:01:47 -0800379 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
Ingo Oeser322f74a2006-03-20 23:01:47 -0800381 /* One reference from device. We must do this before
382 * we invoke __ipv6_regen_rndid().
383 */
384 in6_dev_hold(ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900386 if (dev->flags & (IFF_NOARP | IFF_LOOPBACK))
387 ndev->cnf.accept_dad = -1;
388
Amerigo Wang07a93622012-10-29 16:23:10 +0000389#if IS_ENABLED(CONFIG_IPV6_SIT)
YOSHIFUJI Hideakib077d7a2008-04-13 23:42:18 -0700390 if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) {
Joe Perchesf3213832012-05-15 14:11:53 +0000391 pr_info("%s: Disabled Multicast RS\n", dev->name);
YOSHIFUJI Hideakib077d7a2008-04-13 23:42:18 -0700392 ndev->cnf.rtr_solicits = 0;
393 }
394#endif
395
stephen hemminger372e6c82010-03-17 20:31:09 +0000396 INIT_LIST_HEAD(&ndev->tempaddr_list);
Pavel Emelyanovb24b8a22008-01-23 21:20:07 -0800397 setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800398 if ((dev->flags&IFF_LOOPBACK) ||
399 dev->type == ARPHRD_TUNNEL ||
YOSHIFUJI Hideaki9625ed72008-04-13 23:47:11 -0700400 dev->type == ARPHRD_TUNNEL6 ||
Joerg Roedel0be669b2006-10-10 14:49:53 -0700401 dev->type == ARPHRD_SIT ||
Joerg Roedel0be669b2006-10-10 14:49:53 -0700402 dev->type == ARPHRD_NONE) {
Ingo Oeser322f74a2006-03-20 23:01:47 -0800403 ndev->cnf.use_tempaddr = -1;
404 } else {
405 in6_dev_hold(ndev);
406 ipv6_regen_rndid((unsigned long) ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 }
David S. Miller5d9efa72013-10-28 20:07:50 -0400408
Daniel Borkmann914faa12013-04-09 03:47:14 +0000409 ndev->token = in6addr_any;
Ingo Oeser322f74a2006-03-20 23:01:47 -0800410
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -0700411 if (netif_running(dev) && addrconf_qdisc_ok(dev))
Herbert Xu53aadcc2007-03-27 14:31:52 -0700412 ndev->if_flags |= IF_READY;
413
Ingo Oeser322f74a2006-03-20 23:01:47 -0800414 ipv6_mc_init_dev(ndev);
415 ndev->tstamp = jiffies;
WANG Conga317a2f2014-07-25 15:25:09 -0700416 err = addrconf_sysctl_register(ndev);
417 if (err) {
418 ipv6_mc_destroy_dev(ndev);
419 del_timer(&ndev->regen_timer);
420 goto err_release;
421 }
David L Stevens30c4cf52007-01-04 12:31:14 -0800422 /* protected by rtnl_lock */
Eric Dumazetcf778b02012-01-12 04:41:32 +0000423 rcu_assign_pointer(dev->ip6_ptr, ndev);
YOSHIFUJI Hideakid88ae4c2007-01-14 21:48:40 -0800424
Hannes Frederic Sowa2c5e8932013-02-10 03:50:18 +0000425 /* Join interface-local all-node multicast group */
426 ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allnodes);
427
YOSHIFUJI Hideakid88ae4c2007-01-14 21:48:40 -0800428 /* Join all-node multicast group */
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +0900429 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
YOSHIFUJI Hideakid88ae4c2007-01-14 21:48:40 -0800430
Li Weid6ddef92012-03-05 14:45:17 +0000431 /* Join all-router multicast group if forwarding is set */
Li Wei8b2aaed2012-03-07 14:58:07 +0000432 if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST))
Li Weid6ddef92012-03-05 14:45:17 +0000433 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
434
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 return ndev;
WANG Conga317a2f2014-07-25 15:25:09 -0700436
437err_release:
438 neigh_parms_release(&nd_tbl, ndev->nd_parms);
439 ndev->dead = 1;
440 in6_dev_finish_destroy(ndev);
441 return ERR_PTR(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442}
443
Eldad Zack8e5e8f32012-04-01 07:49:08 +0000444static struct inet6_dev *ipv6_find_idev(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445{
446 struct inet6_dev *idev;
447
448 ASSERT_RTNL();
449
Stephen Hemmingere21e8462010-03-20 16:09:01 -0700450 idev = __in6_dev_get(dev);
451 if (!idev) {
452 idev = ipv6_add_dev(dev);
WANG Conga317a2f2014-07-25 15:25:09 -0700453 if (IS_ERR(idev))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 return NULL;
455 }
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +0900456
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 if (dev->flags&IFF_UP)
458 ipv6_mc_up(idev);
459 return idev;
460}
461
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000462static int inet6_netconf_msgsize_devconf(int type)
463{
464 int size = NLMSG_ALIGN(sizeof(struct netconfmsg))
465 + nla_total_size(4); /* NETCONFA_IFINDEX */
466
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000467 /* type -1 is used for ALL */
468 if (type == -1 || type == NETCONFA_FORWARDING)
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000469 size += nla_total_size(4);
David S. Millerb1afce92012-12-04 14:46:34 -0500470#ifdef CONFIG_IPV6_MROUTE
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000471 if (type == -1 || type == NETCONFA_MC_FORWARDING)
472 size += nla_total_size(4);
David S. Millerb1afce92012-12-04 14:46:34 -0500473#endif
stephen hemmingerc92d5492013-12-17 22:37:14 -0800474 if (type == -1 || type == NETCONFA_PROXY_NEIGH)
475 size += nla_total_size(4);
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000476
Andy Gospodarek35103d12015-08-13 10:39:01 -0400477 if (type == -1 || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN)
478 size += nla_total_size(4);
479
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000480 return size;
481}
482
483static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex,
484 struct ipv6_devconf *devconf, u32 portid,
485 u32 seq, int event, unsigned int flags,
486 int type)
487{
488 struct nlmsghdr *nlh;
489 struct netconfmsg *ncm;
490
491 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg),
492 flags);
Ian Morris63159f22015-03-29 14:00:04 +0100493 if (!nlh)
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000494 return -EMSGSIZE;
495
496 ncm = nlmsg_data(nlh);
497 ncm->ncm_family = AF_INET6;
498
499 if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0)
500 goto nla_put_failure;
501
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000502 /* type -1 is used for ALL */
503 if ((type == -1 || type == NETCONFA_FORWARDING) &&
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000504 nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0)
505 goto nla_put_failure;
David S. Millerb1afce92012-12-04 14:46:34 -0500506#ifdef CONFIG_IPV6_MROUTE
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000507 if ((type == -1 || type == NETCONFA_MC_FORWARDING) &&
508 nla_put_s32(skb, NETCONFA_MC_FORWARDING,
509 devconf->mc_forwarding) < 0)
510 goto nla_put_failure;
David S. Millerb1afce92012-12-04 14:46:34 -0500511#endif
stephen hemmingerc92d5492013-12-17 22:37:14 -0800512 if ((type == -1 || type == NETCONFA_PROXY_NEIGH) &&
513 nla_put_s32(skb, NETCONFA_PROXY_NEIGH, devconf->proxy_ndp) < 0)
514 goto nla_put_failure;
515
Andy Gospodarek35103d12015-08-13 10:39:01 -0400516 if ((type == -1 || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) &&
517 nla_put_s32(skb, NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN,
518 devconf->ignore_routes_with_linkdown) < 0)
519 goto nla_put_failure;
520
Johannes Berg053c0952015-01-16 22:09:00 +0100521 nlmsg_end(skb, nlh);
522 return 0;
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000523
524nla_put_failure:
525 nlmsg_cancel(skb, nlh);
526 return -EMSGSIZE;
527}
528
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000529void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
530 struct ipv6_devconf *devconf)
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000531{
532 struct sk_buff *skb;
533 int err = -ENOBUFS;
534
535 skb = nlmsg_new(inet6_netconf_msgsize_devconf(type), GFP_ATOMIC);
Ian Morris63159f22015-03-29 14:00:04 +0100536 if (!skb)
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000537 goto errout;
538
539 err = inet6_netconf_fill_devconf(skb, ifindex, devconf, 0, 0,
540 RTM_NEWNETCONF, 0, type);
541 if (err < 0) {
542 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
543 WARN_ON(err == -EMSGSIZE);
544 kfree_skb(skb);
545 goto errout;
546 }
547 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_NETCONF, NULL, GFP_ATOMIC);
548 return;
549errout:
Cong Dingbd779022012-12-18 12:08:56 +0000550 rtnl_set_sk_err(net, RTNLGRP_IPV6_NETCONF, err);
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000551}
552
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000553static const struct nla_policy devconf_ipv6_policy[NETCONFA_MAX+1] = {
554 [NETCONFA_IFINDEX] = { .len = sizeof(int) },
555 [NETCONFA_FORWARDING] = { .len = sizeof(int) },
stephen hemmingerc92d5492013-12-17 22:37:14 -0800556 [NETCONFA_PROXY_NEIGH] = { .len = sizeof(int) },
Andy Gospodarek35103d12015-08-13 10:39:01 -0400557 [NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN] = { .len = sizeof(int) },
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000558};
559
560static int inet6_netconf_get_devconf(struct sk_buff *in_skb,
Thomas Graf661d2962013-03-21 07:45:29 +0000561 struct nlmsghdr *nlh)
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000562{
563 struct net *net = sock_net(in_skb->sk);
564 struct nlattr *tb[NETCONFA_MAX+1];
565 struct netconfmsg *ncm;
566 struct sk_buff *skb;
567 struct ipv6_devconf *devconf;
568 struct inet6_dev *in6_dev;
569 struct net_device *dev;
570 int ifindex;
571 int err;
572
573 err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX,
574 devconf_ipv6_policy);
575 if (err < 0)
576 goto errout;
577
578 err = EINVAL;
579 if (!tb[NETCONFA_IFINDEX])
580 goto errout;
581
582 ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]);
583 switch (ifindex) {
584 case NETCONFA_IFINDEX_ALL:
585 devconf = net->ipv6.devconf_all;
586 break;
587 case NETCONFA_IFINDEX_DEFAULT:
588 devconf = net->ipv6.devconf_dflt;
589 break;
590 default:
591 dev = __dev_get_by_index(net, ifindex);
Ian Morris63159f22015-03-29 14:00:04 +0100592 if (!dev)
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000593 goto errout;
594 in6_dev = __in6_dev_get(dev);
Ian Morris63159f22015-03-29 14:00:04 +0100595 if (!in6_dev)
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000596 goto errout;
597 devconf = &in6_dev->cnf;
598 break;
599 }
600
601 err = -ENOBUFS;
602 skb = nlmsg_new(inet6_netconf_msgsize_devconf(-1), GFP_ATOMIC);
Ian Morris63159f22015-03-29 14:00:04 +0100603 if (!skb)
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000604 goto errout;
605
606 err = inet6_netconf_fill_devconf(skb, ifindex, devconf,
607 NETLINK_CB(in_skb).portid,
608 nlh->nlmsg_seq, RTM_NEWNETCONF, 0,
609 -1);
610 if (err < 0) {
611 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
612 WARN_ON(err == -EMSGSIZE);
613 kfree_skb(skb);
614 goto errout;
615 }
616 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
617errout:
618 return err;
619}
620
Nicolas Dichtel7a674202013-03-05 23:42:06 +0000621static int inet6_netconf_dump_devconf(struct sk_buff *skb,
622 struct netlink_callback *cb)
623{
624 struct net *net = sock_net(skb->sk);
625 int h, s_h;
626 int idx, s_idx;
627 struct net_device *dev;
628 struct inet6_dev *idev;
629 struct hlist_head *head;
630
631 s_h = cb->args[0];
632 s_idx = idx = cb->args[1];
633
634 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
635 idx = 0;
636 head = &net->dev_index_head[h];
637 rcu_read_lock();
Nicolas Dichtel63998ac2013-03-22 06:28:43 +0000638 cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^
639 net->dev_base_seq;
Nicolas Dichtel7a674202013-03-05 23:42:06 +0000640 hlist_for_each_entry_rcu(dev, head, index_hlist) {
641 if (idx < s_idx)
642 goto cont;
643 idev = __in6_dev_get(dev);
644 if (!idev)
645 goto cont;
646
647 if (inet6_netconf_fill_devconf(skb, dev->ifindex,
648 &idev->cnf,
649 NETLINK_CB(cb->skb).portid,
650 cb->nlh->nlmsg_seq,
651 RTM_NEWNETCONF,
652 NLM_F_MULTI,
Johannes Berg053c0952015-01-16 22:09:00 +0100653 -1) < 0) {
Nicolas Dichtel7a674202013-03-05 23:42:06 +0000654 rcu_read_unlock();
655 goto done;
656 }
Nicolas Dichtel63998ac2013-03-22 06:28:43 +0000657 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
Nicolas Dichtel7a674202013-03-05 23:42:06 +0000658cont:
659 idx++;
660 }
661 rcu_read_unlock();
662 }
663 if (h == NETDEV_HASHENTRIES) {
664 if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL,
665 net->ipv6.devconf_all,
666 NETLINK_CB(cb->skb).portid,
667 cb->nlh->nlmsg_seq,
668 RTM_NEWNETCONF, NLM_F_MULTI,
Johannes Berg053c0952015-01-16 22:09:00 +0100669 -1) < 0)
Nicolas Dichtel7a674202013-03-05 23:42:06 +0000670 goto done;
671 else
672 h++;
673 }
674 if (h == NETDEV_HASHENTRIES + 1) {
675 if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT,
676 net->ipv6.devconf_dflt,
677 NETLINK_CB(cb->skb).portid,
678 cb->nlh->nlmsg_seq,
679 RTM_NEWNETCONF, NLM_F_MULTI,
Johannes Berg053c0952015-01-16 22:09:00 +0100680 -1) < 0)
Nicolas Dichtel7a674202013-03-05 23:42:06 +0000681 goto done;
682 else
683 h++;
684 }
685done:
686 cb->args[0] = h;
687 cb->args[1] = idx;
688
689 return skb->len;
690}
691
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692#ifdef CONFIG_SYSCTL
693static void dev_forward_change(struct inet6_dev *idev)
694{
695 struct net_device *dev;
696 struct inet6_ifaddr *ifa;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697
698 if (!idev)
699 return;
700 dev = idev->dev;
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700701 if (idev->cnf.forwarding)
702 dev_disable_lro(dev);
Amerigo Wang1a940832012-10-28 17:43:53 +0000703 if (dev->flags & IFF_MULTICAST) {
Hannes Frederic Sowa2c5e8932013-02-10 03:50:18 +0000704 if (idev->cnf.forwarding) {
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +0900705 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
Hannes Frederic Sowa2c5e8932013-02-10 03:50:18 +0000706 ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allrouters);
707 ipv6_dev_mc_inc(dev, &in6addr_sitelocal_allrouters);
708 } else {
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +0900709 ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters);
Hannes Frederic Sowa2c5e8932013-02-10 03:50:18 +0000710 ipv6_dev_mc_dec(dev, &in6addr_interfacelocal_allrouters);
711 ipv6_dev_mc_dec(dev, &in6addr_sitelocal_allrouters);
712 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 }
stephen hemminger502a2ff2010-03-17 20:31:13 +0000714
715 list_for_each_entry(ifa, &idev->addr_list, if_list) {
Michal Wrobel2c12a742007-02-26 15:36:10 -0800716 if (ifa->flags&IFA_F_TENTATIVE)
717 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718 if (idev->cnf.forwarding)
719 addrconf_join_anycast(ifa);
720 else
721 addrconf_leave_anycast(ifa);
722 }
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000723 inet6_netconf_notify_devconf(dev_net(dev), NETCONFA_FORWARDING,
724 dev->ifindex, &idev->cnf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725}
726
727
Pavel Emelyanove1869322008-01-10 17:43:50 -0800728static void addrconf_forward_change(struct net *net, __s32 newf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729{
730 struct net_device *dev;
731 struct inet6_dev *idev;
732
Ben Hutchings4acd4942012-08-14 08:54:51 +0000733 for_each_netdev(net, dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734 idev = __in6_dev_get(dev);
735 if (idev) {
Pavel Emelyanove1869322008-01-10 17:43:50 -0800736 int changed = (!idev->cnf.forwarding) ^ (!newf);
737 idev->cnf.forwarding = newf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738 if (changed)
739 dev_forward_change(idev);
740 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742}
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800743
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000744static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf)
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800745{
Pavel Emelyanovbff16c22008-01-10 17:42:13 -0800746 struct net *net;
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000747 int old;
748
749 if (!rtnl_trylock())
750 return restart_syscall();
Pavel Emelyanovbff16c22008-01-10 17:42:13 -0800751
752 net = (struct net *)table->extra2;
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000753 old = *p;
754 *p = newf;
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800755
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000756 if (p == &net->ipv6.devconf_dflt->forwarding) {
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000757 if ((!newf) ^ (!old))
758 inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING,
759 NETCONFA_IFINDEX_DEFAULT,
760 net->ipv6.devconf_dflt);
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000761 rtnl_unlock();
762 return 0;
Eric W. Biederman88af1822010-02-19 13:22:59 +0000763 }
Stephen Hemmingerb325fdd2009-02-26 06:55:31 +0000764
Pavel Emelyanove1869322008-01-10 17:43:50 -0800765 if (p == &net->ipv6.devconf_all->forwarding) {
Pavel Emelyanove1869322008-01-10 17:43:50 -0800766 net->ipv6.devconf_dflt->forwarding = newf;
767 addrconf_forward_change(net, newf);
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000768 if ((!newf) ^ (!old))
769 inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING,
770 NETCONFA_IFINDEX_ALL,
771 net->ipv6.devconf_all);
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000772 } else if ((!newf) ^ (!old))
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800773 dev_forward_change((struct inet6_dev *)table->extra1);
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700774 rtnl_unlock();
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800775
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000776 if (newf)
Daniel Lezcano7b4da532008-03-04 13:47:14 -0800777 rt6_purge_dflt_routers(net);
Stephen Hemmingerb325fdd2009-02-26 06:55:31 +0000778 return 1;
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800779}
Andy Gospodarek35103d12015-08-13 10:39:01 -0400780
781static void addrconf_linkdown_change(struct net *net, __s32 newf)
782{
783 struct net_device *dev;
784 struct inet6_dev *idev;
785
786 for_each_netdev(net, dev) {
787 idev = __in6_dev_get(dev);
788 if (idev) {
789 int changed = (!idev->cnf.ignore_routes_with_linkdown) ^ (!newf);
790
791 idev->cnf.ignore_routes_with_linkdown = newf;
792 if (changed)
793 inet6_netconf_notify_devconf(dev_net(dev),
794 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN,
795 dev->ifindex,
796 &idev->cnf);
797 }
798 }
799}
800
801static int addrconf_fixup_linkdown(struct ctl_table *table, int *p, int newf)
802{
803 struct net *net;
804 int old;
805
806 if (!rtnl_trylock())
807 return restart_syscall();
808
809 net = (struct net *)table->extra2;
810 old = *p;
811 *p = newf;
812
813 if (p == &net->ipv6.devconf_dflt->ignore_routes_with_linkdown) {
814 if ((!newf) ^ (!old))
815 inet6_netconf_notify_devconf(net,
816 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN,
817 NETCONFA_IFINDEX_DEFAULT,
818 net->ipv6.devconf_dflt);
819 rtnl_unlock();
820 return 0;
821 }
822
823 if (p == &net->ipv6.devconf_all->ignore_routes_with_linkdown) {
824 net->ipv6.devconf_dflt->ignore_routes_with_linkdown = newf;
825 addrconf_linkdown_change(net, newf);
826 if ((!newf) ^ (!old))
827 inet6_netconf_notify_devconf(net,
828 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN,
829 NETCONFA_IFINDEX_ALL,
830 net->ipv6.devconf_all);
831 }
832 rtnl_unlock();
833
834 return 1;
835}
836
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837#endif
838
stephen hemminger5c578aed2010-03-17 20:31:11 +0000839/* Nobody refers to this ifaddr, destroy it */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
841{
stephen hemmingerc2e21292010-03-17 20:31:10 +0000842 WARN_ON(!hlist_unhashed(&ifp->addr_lst));
Ilpo Järvinen547b7922008-07-25 21:43:18 -0700843
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844#ifdef NET_REFCNT_DEBUG
Joe Perches91df42b2012-05-15 14:11:54 +0000845 pr_debug("%s\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846#endif
847
848 in6_dev_put(ifp->idev);
849
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +0100850 if (cancel_delayed_work(&ifp->dad_work))
851 pr_notice("delayed DAD work was pending while freeing ifa=%p\n",
852 ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853
Herbert Xue9d3e082010-05-18 15:36:06 -0700854 if (ifp->state != INET6_IFADDR_STATE_DEAD) {
Joe Perchesf3213832012-05-15 14:11:53 +0000855 pr_warn("Freeing alive inet6 address %p\n", ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856 return;
857 }
Amerigo Wang94e187c2012-10-29 00:13:19 +0000858 ip6_rt_put(ifp->rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859
Lai Jiangshane5785982011-03-15 18:00:14 +0800860 kfree_rcu(ifp, rcu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861}
862
Brian Haleye55ffac2006-07-10 15:25:51 -0700863static void
864ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
865{
stephen hemminger502a2ff2010-03-17 20:31:13 +0000866 struct list_head *p;
YOSHIFUJI Hideaki8a6ce0c2006-07-11 13:05:30 -0700867 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
Brian Haleye55ffac2006-07-10 15:25:51 -0700868
869 /*
870 * Each device address list is sorted in order of scope -
871 * global before linklocal.
872 */
stephen hemminger502a2ff2010-03-17 20:31:13 +0000873 list_for_each(p, &idev->addr_list) {
874 struct inet6_ifaddr *ifa
875 = list_entry(p, struct inet6_ifaddr, if_list);
YOSHIFUJI Hideaki8a6ce0c2006-07-11 13:05:30 -0700876 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
Brian Haleye55ffac2006-07-10 15:25:51 -0700877 break;
878 }
879
David S. Millerb54c9b92010-03-25 21:25:30 -0700880 list_add_tail(&ifp->if_list, p);
Brian Haleye55ffac2006-07-10 15:25:51 -0700881}
882
Eric Dumazetddbe5032012-07-18 08:11:12 +0000883static u32 inet6_addr_hash(const struct in6_addr *addr)
YOSHIFUJI Hideaki3eb84f42008-04-10 15:42:08 +0900884{
Eric Dumazetddbe5032012-07-18 08:11:12 +0000885 return hash_32(ipv6_addr_hash(addr), IN6_ADDR_HSIZE_SHIFT);
YOSHIFUJI Hideaki3eb84f42008-04-10 15:42:08 +0900886}
887
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888/* On success it returns ifp with increased reference count */
889
890static struct inet6_ifaddr *
Jiri Pirko3f8f5292013-08-01 10:41:27 +0200891ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
892 const struct in6_addr *peer_addr, int pfxlen,
Jiri Benc8a226b22013-08-01 10:41:28 +0200893 int scope, u32 flags, u32 valid_lft, u32 prefered_lft)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894{
895 struct inet6_ifaddr *ifa = NULL;
896 struct rt6_info *rt;
stephen hemminger3a88a812010-03-17 20:31:12 +0000897 unsigned int hash;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898 int err = 0;
YOSHIFUJI Hideakid68b8272008-06-25 16:26:47 +0900899 int addr_type = ipv6_addr_type(addr);
900
901 if (addr_type == IPV6_ADDR_ANY ||
902 addr_type & IPV6_ADDR_MULTICAST ||
903 (!(idev->dev->flags & IFF_LOOPBACK) &&
904 addr_type & IPV6_ADDR_LOOPBACK))
905 return ERR_PTR(-EADDRNOTAVAIL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700907 rcu_read_lock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908 if (idev->dead) {
909 err = -ENODEV; /*XXX*/
910 goto out2;
911 }
912
Brian Haley56d417b2009-06-01 03:07:33 -0700913 if (idev->cnf.disable_ipv6) {
Brian Haley9bdd8d42009-03-18 18:22:48 -0700914 err = -EACCES;
915 goto out2;
916 }
917
stephen hemminger5c578aed2010-03-17 20:31:11 +0000918 spin_lock(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919
920 /* Ignore adding duplicate addresses on an interface */
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900921 if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) {
dingtianhongba3542e2013-08-17 10:27:04 +0800922 ADBG("ipv6_add_addr: already assigned\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923 err = -EEXIST;
924 goto out;
925 }
926
Ingo Oeser322f74a2006-03-20 23:01:47 -0800927 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928
Ian Morris63159f22015-03-29 14:00:04 +0100929 if (!ifa) {
dingtianhongba3542e2013-08-17 10:27:04 +0800930 ADBG("ipv6_add_addr: malloc failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931 err = -ENOBUFS;
932 goto out;
933 }
934
David S. Miller8f031512011-12-06 16:48:14 -0500935 rt = addrconf_dst_alloc(idev, addr, false);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936 if (IS_ERR(rt)) {
937 err = PTR_ERR(rt);
938 goto out;
939 }
940
Jiri Pirkobba24892013-12-07 19:26:57 +0100941 neigh_parms_data_state_setall(idev->nd_parms);
942
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000943 ifa->addr = *addr;
Jiri Pirko3f8f5292013-08-01 10:41:27 +0200944 if (peer_addr)
945 ifa->peer_addr = *peer_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946
947 spin_lock_init(&ifa->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +0100948 INIT_DELAYED_WORK(&ifa->dad_work, addrconf_dad_work);
stephen hemmingerc2e21292010-03-17 20:31:10 +0000949 INIT_HLIST_NODE(&ifa->addr_lst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950 ifa->scope = scope;
951 ifa->prefix_len = pfxlen;
952 ifa->flags = flags | IFA_F_TENTATIVE;
Jiri Benc8a226b22013-08-01 10:41:28 +0200953 ifa->valid_lft = valid_lft;
954 ifa->prefered_lft = prefered_lft;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955 ifa->cstamp = ifa->tstamp = jiffies;
Daniel Borkmann617fe292013-04-09 03:47:16 +0000956 ifa->tokenized = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957
Keir Fraser57f5f542006-08-29 02:43:49 -0700958 ifa->rt = rt;
959
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960 ifa->idev = idev;
961 in6_dev_hold(idev);
962 /* For caller */
963 in6_ifa_hold(ifa);
964
965 /* Add to big hash table */
Eric Dumazetddbe5032012-07-18 08:11:12 +0000966 hash = inet6_addr_hash(addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967
stephen hemminger5c578aed2010-03-17 20:31:11 +0000968 hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]);
stephen hemminger5c578aed2010-03-17 20:31:11 +0000969 spin_unlock(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970
971 write_lock(&idev->lock);
972 /* Add to inet6_dev unicast addr list. */
Brian Haleye55ffac2006-07-10 15:25:51 -0700973 ipv6_link_dev_addr(idev, ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975 if (ifa->flags&IFA_F_TEMPORARY) {
stephen hemminger372e6c82010-03-17 20:31:09 +0000976 list_add(&ifa->tmp_list, &idev->tempaddr_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977 in6_ifa_hold(ifa);
978 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980 in6_ifa_hold(ifa);
981 write_unlock(&idev->lock);
982out2:
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700983 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984
YOSHIFUJI Hideakifd928332005-04-19 22:27:09 -0700985 if (likely(err == 0))
Cong Wangf88c91d2013-04-14 23:18:43 +0800986 inet6addr_notifier_call_chain(NETDEV_UP, ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987 else {
988 kfree(ifa);
989 ifa = ERR_PTR(err);
990 }
991
992 return ifa;
993out:
stephen hemminger5c578aed2010-03-17 20:31:11 +0000994 spin_unlock(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995 goto out2;
996}
997
Thomas Haller5b84efe2014-01-15 15:36:59 +0100998enum cleanup_prefix_rt_t {
999 CLEANUP_PREFIX_RT_NOP, /* no cleanup action for prefix route */
1000 CLEANUP_PREFIX_RT_DEL, /* delete the prefix route */
1001 CLEANUP_PREFIX_RT_EXPIRE, /* update the lifetime of the prefix route */
1002};
1003
1004/*
1005 * Check, whether the prefix for ifp would still need a prefix route
1006 * after deleting ifp. The function returns one of the CLEANUP_PREFIX_RT_*
1007 * constants.
1008 *
1009 * 1) we don't purge prefix if address was not permanent.
1010 * prefix is managed by its own lifetime.
1011 * 2) we also don't purge, if the address was IFA_F_NOPREFIXROUTE.
1012 * 3) if there are no addresses, delete prefix.
1013 * 4) if there are still other permanent address(es),
1014 * corresponding prefix is still permanent.
1015 * 5) if there are still other addresses with IFA_F_NOPREFIXROUTE,
1016 * don't purge the prefix, assume user space is managing it.
1017 * 6) otherwise, update prefix lifetime to the
1018 * longest valid lifetime among the corresponding
1019 * addresses on the device.
1020 * Note: subsequent RA will update lifetime.
1021 **/
1022static enum cleanup_prefix_rt_t
1023check_cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long *expires)
1024{
1025 struct inet6_ifaddr *ifa;
1026 struct inet6_dev *idev = ifp->idev;
1027 unsigned long lifetime;
1028 enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_DEL;
1029
1030 *expires = jiffies;
1031
1032 list_for_each_entry(ifa, &idev->addr_list, if_list) {
1033 if (ifa == ifp)
1034 continue;
1035 if (!ipv6_prefix_equal(&ifa->addr, &ifp->addr,
1036 ifp->prefix_len))
1037 continue;
1038 if (ifa->flags & (IFA_F_PERMANENT | IFA_F_NOPREFIXROUTE))
1039 return CLEANUP_PREFIX_RT_NOP;
1040
1041 action = CLEANUP_PREFIX_RT_EXPIRE;
1042
1043 spin_lock(&ifa->lock);
1044
1045 lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ);
1046 /*
1047 * Note: Because this address is
1048 * not permanent, lifetime <
1049 * LONG_MAX / HZ here.
1050 */
1051 if (time_before(*expires, ifa->tstamp + lifetime * HZ))
1052 *expires = ifa->tstamp + lifetime * HZ;
1053 spin_unlock(&ifa->lock);
1054 }
1055
1056 return action;
1057}
1058
1059static void
1060cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long expires, bool del_rt)
1061{
1062 struct rt6_info *rt;
1063
1064 rt = addrconf_get_prefix_route(&ifp->addr,
1065 ifp->prefix_len,
1066 ifp->idev->dev,
1067 0, RTF_GATEWAY | RTF_DEFAULT);
1068 if (rt) {
1069 if (del_rt)
1070 ip6_del_rt(rt);
1071 else {
1072 if (!(rt->rt6i_flags & RTF_EXPIRES))
1073 rt6_set_expires(rt, expires);
1074 ip6_rt_put(rt);
1075 }
1076 }
1077}
1078
1079
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080/* This function wants to get referenced ifp and releases it before return */
1081
1082static void ipv6_del_addr(struct inet6_ifaddr *ifp)
1083{
Herbert Xu4c5ff6a2010-05-18 15:54:18 -07001084 int state;
Thomas Haller5b84efe2014-01-15 15:36:59 +01001085 enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_NOP;
1086 unsigned long expires;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01001088 ASSERT_RTNL();
1089
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01001090 spin_lock_bh(&ifp->lock);
Herbert Xu4c5ff6a2010-05-18 15:54:18 -07001091 state = ifp->state;
Herbert Xue9d3e082010-05-18 15:36:06 -07001092 ifp->state = INET6_IFADDR_STATE_DEAD;
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01001093 spin_unlock_bh(&ifp->lock);
Herbert Xu4c5ff6a2010-05-18 15:54:18 -07001094
1095 if (state == INET6_IFADDR_STATE_DEAD)
1096 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097
stephen hemminger5c578aed2010-03-17 20:31:11 +00001098 spin_lock_bh(&addrconf_hash_lock);
1099 hlist_del_init_rcu(&ifp->addr_lst);
stephen hemminger5c578aed2010-03-17 20:31:11 +00001100 spin_unlock_bh(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101
Thomas Haller5b84efe2014-01-15 15:36:59 +01001102 write_lock_bh(&ifp->idev->lock);
David S. Miller5d9efa72013-10-28 20:07:50 -04001103
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104 if (ifp->flags&IFA_F_TEMPORARY) {
stephen hemminger372e6c82010-03-17 20:31:09 +00001105 list_del(&ifp->tmp_list);
1106 if (ifp->ifpub) {
1107 in6_ifa_put(ifp->ifpub);
1108 ifp->ifpub = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109 }
stephen hemminger372e6c82010-03-17 20:31:09 +00001110 __in6_ifa_put(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112
Thomas Haller5b84efe2014-01-15 15:36:59 +01001113 if (ifp->flags & IFA_F_PERMANENT && !(ifp->flags & IFA_F_NOPREFIXROUTE))
1114 action = check_cleanup_prefix_route(ifp, &expires);
stephen hemminger502a2ff2010-03-17 20:31:13 +00001115
Thomas Haller5b84efe2014-01-15 15:36:59 +01001116 list_del_init(&ifp->if_list);
1117 __in6_ifa_put(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118
Thomas Haller5b84efe2014-01-15 15:36:59 +01001119 write_unlock_bh(&ifp->idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01001121 addrconf_del_dad_work(ifp);
Andrey Vaginb2238562008-07-08 15:13:31 -07001122
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123 ipv6_ifa_notify(RTM_DELADDR, ifp);
1124
Cong Wangf88c91d2013-04-14 23:18:43 +08001125 inet6addr_notifier_call_chain(NETDEV_DOWN, ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126
Thomas Haller5b84efe2014-01-15 15:36:59 +01001127 if (action != CLEANUP_PREFIX_RT_NOP) {
1128 cleanup_prefix_route(ifp, expires,
1129 action == CLEANUP_PREFIX_RT_DEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130 }
1131
Daniel Walterc3968a82011-04-13 21:10:57 +00001132 /* clean up prefsrc entries */
1133 rt6_remove_prefsrc(ifp);
Herbert Xu4c5ff6a2010-05-18 15:54:18 -07001134out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135 in6_ifa_put(ifp);
1136}
1137
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
1139{
1140 struct inet6_dev *idev = ifp->idev;
1141 struct in6_addr addr, *tmpaddr;
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00001142 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age;
Benoit Boissinoteac55bf2008-04-02 00:01:35 -07001143 unsigned long regen_advance;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144 int tmp_plen;
1145 int ret = 0;
Neil Horman95c385b2007-04-25 17:08:10 -07001146 u32 addr_flags;
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00001147 unsigned long now = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148
Jiri Pirko53bd6742013-12-06 09:45:22 +01001149 write_lock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150 if (ift) {
1151 spin_lock_bh(&ift->lock);
1152 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
1153 spin_unlock_bh(&ift->lock);
1154 tmpaddr = &addr;
1155 } else {
1156 tmpaddr = NULL;
1157 }
1158retry:
1159 in6_dev_hold(idev);
1160 if (idev->cnf.use_tempaddr <= 0) {
Jiri Pirko53bd6742013-12-06 09:45:22 +01001161 write_unlock_bh(&idev->lock);
Joe Perchesf3213832012-05-15 14:11:53 +00001162 pr_info("%s: use_tempaddr is disabled\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163 in6_dev_put(idev);
1164 ret = -1;
1165 goto out;
1166 }
1167 spin_lock_bh(&ifp->lock);
1168 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
1169 idev->cnf.use_tempaddr = -1; /*XXX*/
1170 spin_unlock_bh(&ifp->lock);
Jiri Pirko53bd6742013-12-06 09:45:22 +01001171 write_unlock_bh(&idev->lock);
Joe Perchesf3213832012-05-15 14:11:53 +00001172 pr_warn("%s: regeneration time exceeded - disabled temporary address support\n",
1173 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174 in6_dev_put(idev);
1175 ret = -1;
1176 goto out;
1177 }
1178 in6_ifa_hold(ifp);
1179 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00001180 __ipv6_try_regen_rndid(idev, tmpaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181 memcpy(&addr.s6_addr[8], idev->rndid, 8);
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00001182 age = (now - ifp->tstamp) / HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183 tmp_valid_lft = min_t(__u32,
1184 ifp->valid_lft,
Glenn Wurster7a876b02010-09-27 07:10:10 +00001185 idev->cnf.temp_valid_lft + age);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001186 tmp_prefered_lft = min_t(__u32,
1187 ifp->prefered_lft,
Glenn Wurster7a876b02010-09-27 07:10:10 +00001188 idev->cnf.temp_prefered_lft + age -
Ben Hutchings784e2712010-06-26 11:42:55 +00001189 idev->cnf.max_desync_factor);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190 tmp_plen = ifp->prefix_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191 tmp_tstamp = ifp->tstamp;
1192 spin_unlock_bh(&ifp->lock);
1193
Benoit Boissinoteac55bf2008-04-02 00:01:35 -07001194 regen_advance = idev->cnf.regen_max_retry *
Ian Morris67ba4152014-08-24 21:53:10 +01001195 idev->cnf.dad_transmits *
1196 NEIGH_VAR(idev->nd_parms, RETRANS_TIME) / HZ;
Jiri Pirko53bd6742013-12-06 09:45:22 +01001197 write_unlock_bh(&idev->lock);
Neil Horman95c385b2007-04-25 17:08:10 -07001198
Benoit Boissinoteac55bf2008-04-02 00:01:35 -07001199 /* A temporary address is created only if this calculated Preferred
1200 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
1201 * an implementation must not create a temporary address with a zero
1202 * Preferred Lifetime.
Heiner Kallweitecab6702014-03-12 22:13:19 +01001203 * Use age calculation as in addrconf_verify to avoid unnecessary
1204 * temporary addresses being generated.
Benoit Boissinoteac55bf2008-04-02 00:01:35 -07001205 */
Heiner Kallweitecab6702014-03-12 22:13:19 +01001206 age = (now - tmp_tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ;
1207 if (tmp_prefered_lft <= regen_advance + age) {
Benoit Boissinoteac55bf2008-04-02 00:01:35 -07001208 in6_ifa_put(ifp);
1209 in6_dev_put(idev);
1210 ret = -1;
1211 goto out;
1212 }
1213
Neil Horman95c385b2007-04-25 17:08:10 -07001214 addr_flags = IFA_F_TEMPORARY;
1215 /* set in addrconf_prefix_rcv() */
1216 if (ifp->flags & IFA_F_OPTIMISTIC)
1217 addr_flags |= IFA_F_OPTIMISTIC;
1218
Hannes Frederic Sowa4b08a8f2013-08-16 13:02:27 +02001219 ift = ipv6_add_addr(idev, &addr, NULL, tmp_plen,
1220 ipv6_addr_scope(&addr), addr_flags,
1221 tmp_valid_lft, tmp_prefered_lft);
1222 if (IS_ERR(ift)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223 in6_ifa_put(ifp);
1224 in6_dev_put(idev);
Joe Perchesf3213832012-05-15 14:11:53 +00001225 pr_info("%s: retry temporary address regeneration\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226 tmpaddr = &addr;
Jiri Pirko53bd6742013-12-06 09:45:22 +01001227 write_lock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228 goto retry;
1229 }
1230
1231 spin_lock_bh(&ift->lock);
1232 ift->ifpub = ifp;
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00001233 ift->cstamp = now;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 ift->tstamp = tmp_tstamp;
1235 spin_unlock_bh(&ift->lock);
1236
David S. Millercf22f9a2012-04-14 21:37:40 -04001237 addrconf_dad_start(ift);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238 in6_ifa_put(ift);
1239 in6_dev_put(idev);
1240out:
1241 return ret;
1242}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243
1244/*
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001245 * Choose an appropriate source address (RFC3484)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246 */
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001247enum {
1248 IPV6_SADDR_RULE_INIT = 0,
1249 IPV6_SADDR_RULE_LOCAL,
1250 IPV6_SADDR_RULE_SCOPE,
1251 IPV6_SADDR_RULE_PREFERRED,
1252#ifdef CONFIG_IPV6_MIP6
1253 IPV6_SADDR_RULE_HOA,
1254#endif
1255 IPV6_SADDR_RULE_OIF,
1256 IPV6_SADDR_RULE_LABEL,
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001257 IPV6_SADDR_RULE_PRIVACY,
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001258 IPV6_SADDR_RULE_ORCHID,
1259 IPV6_SADDR_RULE_PREFIX,
Erik Kline7fd25612014-10-28 18:11:14 +09001260#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1261 IPV6_SADDR_RULE_NOT_OPTIMISTIC,
1262#endif
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001263 IPV6_SADDR_RULE_MAX
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001264};
1265
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001266struct ipv6_saddr_score {
1267 int rule;
1268 int addr_type;
1269 struct inet6_ifaddr *ifa;
1270 DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX);
1271 int scopedist;
1272 int matchlen;
1273};
1274
1275struct ipv6_saddr_dst {
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +09001276 const struct in6_addr *addr;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001277 int ifindex;
1278 int scope;
1279 int label;
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001280 unsigned int prefs;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001281};
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001282
Dave Jonesb6f99a22007-03-22 12:27:49 -07001283static inline int ipv6_saddr_preferred(int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284{
Ulrich Weber45bb0062010-02-25 23:28:58 +00001285 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK))
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001286 return 1;
1287 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288}
1289
Erik Kline7fd25612014-10-28 18:11:14 +09001290static inline bool ipv6_use_optimistic_addr(struct inet6_dev *idev)
1291{
1292#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1293 return idev && idev->cnf.optimistic_dad && idev->cnf.use_optimistic;
1294#else
1295 return false;
1296#endif
1297}
1298
Benjamin Thery3de23252008-05-28 14:51:24 +02001299static int ipv6_get_saddr_eval(struct net *net,
1300 struct ipv6_saddr_score *score,
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001301 struct ipv6_saddr_dst *dst,
1302 int i)
1303{
1304 int ret;
1305
1306 if (i <= score->rule) {
1307 switch (i) {
1308 case IPV6_SADDR_RULE_SCOPE:
1309 ret = score->scopedist;
1310 break;
1311 case IPV6_SADDR_RULE_PREFIX:
1312 ret = score->matchlen;
1313 break;
1314 default:
1315 ret = !!test_bit(i, score->scorebits);
1316 }
1317 goto out;
1318 }
1319
1320 switch (i) {
1321 case IPV6_SADDR_RULE_INIT:
1322 /* Rule 0: remember if hiscore is not ready yet */
1323 ret = !!score->ifa;
1324 break;
1325 case IPV6_SADDR_RULE_LOCAL:
1326 /* Rule 1: Prefer same address */
1327 ret = ipv6_addr_equal(&score->ifa->addr, dst->addr);
1328 break;
1329 case IPV6_SADDR_RULE_SCOPE:
1330 /* Rule 2: Prefer appropriate scope
1331 *
1332 * ret
1333 * ^
1334 * -1 | d 15
1335 * ---+--+-+---> scope
1336 * |
1337 * | d is scope of the destination.
1338 * B-d | \
1339 * | \ <- smaller scope is better if
stephen hemmingerdb9c7c32014-01-12 11:26:32 -08001340 * B-15 | \ if scope is enough for destination.
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001341 * | ret = B - scope (-1 <= scope >= d <= 15).
1342 * d-C-1 | /
1343 * |/ <- greater is better
1344 * -C / if scope is not enough for destination.
1345 * /| ret = scope - C (-1 <= d < scope <= 15).
1346 *
1347 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1348 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1349 * Assume B = 0 and we get C > 29.
1350 */
1351 ret = __ipv6_addr_src_scope(score->addr_type);
1352 if (ret >= dst->scope)
1353 ret = -ret;
1354 else
1355 ret -= 128; /* 30 is enough */
1356 score->scopedist = ret;
1357 break;
1358 case IPV6_SADDR_RULE_PREFERRED:
Erik Kline7fd25612014-10-28 18:11:14 +09001359 {
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001360 /* Rule 3: Avoid deprecated and optimistic addresses */
Erik Kline7fd25612014-10-28 18:11:14 +09001361 u8 avoid = IFA_F_DEPRECATED;
1362
1363 if (!ipv6_use_optimistic_addr(score->ifa->idev))
1364 avoid |= IFA_F_OPTIMISTIC;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001365 ret = ipv6_saddr_preferred(score->addr_type) ||
Erik Kline7fd25612014-10-28 18:11:14 +09001366 !(score->ifa->flags & avoid);
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001367 break;
Erik Kline7fd25612014-10-28 18:11:14 +09001368 }
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001369#ifdef CONFIG_IPV6_MIP6
1370 case IPV6_SADDR_RULE_HOA:
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001371 {
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001372 /* Rule 4: Prefer home address */
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001373 int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA);
1374 ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001375 break;
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001376 }
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001377#endif
1378 case IPV6_SADDR_RULE_OIF:
1379 /* Rule 5: Prefer outgoing interface */
1380 ret = (!dst->ifindex ||
1381 dst->ifindex == score->ifa->idev->dev->ifindex);
1382 break;
1383 case IPV6_SADDR_RULE_LABEL:
1384 /* Rule 6: Prefer matching label */
Benjamin Thery3de23252008-05-28 14:51:24 +02001385 ret = ipv6_addr_label(net,
1386 &score->ifa->addr, score->addr_type,
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001387 score->ifa->idev->dev->ifindex) == dst->label;
1388 break;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001389 case IPV6_SADDR_RULE_PRIVACY:
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001390 {
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001391 /* Rule 7: Prefer public address
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001392 * Note: prefer temporary address if use_tempaddr >= 2
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001393 */
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001394 int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ?
1395 !!(dst->prefs & IPV6_PREFER_SRC_TMP) :
1396 score->ifa->idev->cnf.use_tempaddr >= 2;
1397 ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001398 break;
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001399 }
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001400 case IPV6_SADDR_RULE_ORCHID:
1401 /* Rule 8-: Prefer ORCHID vs ORCHID or
1402 * non-ORCHID vs non-ORCHID
1403 */
1404 ret = !(ipv6_addr_orchid(&score->ifa->addr) ^
1405 ipv6_addr_orchid(dst->addr));
1406 break;
1407 case IPV6_SADDR_RULE_PREFIX:
1408 /* Rule 8: Use longest matching prefix */
YOSHIFUJI Hideaki / 吉藤英明91b4b042012-09-10 18:41:07 +00001409 ret = ipv6_addr_diff(&score->ifa->addr, dst->addr);
1410 if (ret > score->ifa->prefix_len)
1411 ret = score->ifa->prefix_len;
1412 score->matchlen = ret;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001413 break;
Erik Kline7fd25612014-10-28 18:11:14 +09001414#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1415 case IPV6_SADDR_RULE_NOT_OPTIMISTIC:
1416 /* Optimistic addresses still have lower precedence than other
1417 * preferred addresses.
1418 */
1419 ret = !(score->ifa->flags & IFA_F_OPTIMISTIC);
1420 break;
1421#endif
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001422 default:
1423 ret = 0;
1424 }
1425
1426 if (ret)
1427 __set_bit(i, score->scorebits);
1428 score->rule = i;
1429out:
1430 return ret;
1431}
1432
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001433static int __ipv6_dev_get_saddr(struct net *net,
1434 struct ipv6_saddr_dst *dst,
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001435 struct inet6_dev *idev,
1436 struct ipv6_saddr_score *scores,
1437 int hiscore_idx)
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001438{
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001439 struct ipv6_saddr_score *score = &scores[1 - hiscore_idx], *hiscore = &scores[hiscore_idx];
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001440
1441 read_lock_bh(&idev->lock);
1442 list_for_each_entry(score->ifa, &idev->addr_list, if_list) {
1443 int i;
1444
1445 /*
1446 * - Tentative Address (RFC2462 section 5.4)
1447 * - A tentative address is not considered
1448 * "assigned to an interface" in the traditional
1449 * sense, unless it is also flagged as optimistic.
1450 * - Candidate Source Address (section 4)
1451 * - In any case, anycast addresses, multicast
1452 * addresses, and the unspecified address MUST
1453 * NOT be included in a candidate set.
1454 */
1455 if ((score->ifa->flags & IFA_F_TENTATIVE) &&
1456 (!(score->ifa->flags & IFA_F_OPTIMISTIC)))
1457 continue;
1458
1459 score->addr_type = __ipv6_addr_type(&score->ifa->addr);
1460
1461 if (unlikely(score->addr_type == IPV6_ADDR_ANY ||
1462 score->addr_type & IPV6_ADDR_MULTICAST)) {
1463 net_dbg_ratelimited("ADDRCONF: unspecified / multicast address assigned as unicast address on %s",
1464 idev->dev->name);
1465 continue;
1466 }
1467
1468 score->rule = -1;
1469 bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX);
1470
1471 for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) {
1472 int minihiscore, miniscore;
1473
1474 minihiscore = ipv6_get_saddr_eval(net, hiscore, dst, i);
1475 miniscore = ipv6_get_saddr_eval(net, score, dst, i);
1476
1477 if (minihiscore > miniscore) {
1478 if (i == IPV6_SADDR_RULE_SCOPE &&
1479 score->scopedist > 0) {
1480 /*
1481 * special case:
1482 * each remaining entry
1483 * has too small (not enough)
1484 * scope, because ifa entries
1485 * are sorted by their scope
1486 * values.
1487 */
1488 goto out;
1489 }
1490 break;
1491 } else if (minihiscore < miniscore) {
1492 if (hiscore->ifa)
1493 in6_ifa_put(hiscore->ifa);
1494
1495 in6_ifa_hold(score->ifa);
1496
1497 swap(hiscore, score);
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001498 hiscore_idx = 1 - hiscore_idx;
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001499
1500 /* restore our iterator */
1501 score->ifa = hiscore->ifa;
1502
1503 break;
1504 }
1505 }
1506 }
1507out:
1508 read_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001509 return hiscore_idx;
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001510}
1511
Patrick McHardyb3f644f2012-08-26 19:14:14 +02001512int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +09001513 const struct in6_addr *daddr, unsigned int prefs,
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001514 struct in6_addr *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515{
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001516 struct ipv6_saddr_score scores[2], *hiscore;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001517 struct ipv6_saddr_dst dst;
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001518 struct inet6_dev *idev;
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001519 struct net_device *dev;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001520 int dst_type;
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001521 bool use_oif_addr = false;
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001522 int hiscore_idx = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001523
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001524 dst_type = __ipv6_addr_type(daddr);
1525 dst.addr = daddr;
1526 dst.ifindex = dst_dev ? dst_dev->ifindex : 0;
1527 dst.scope = __ipv6_addr_src_scope(dst_type);
Benjamin Thery3de23252008-05-28 14:51:24 +02001528 dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex);
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001529 dst.prefs = prefs;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001530
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001531 scores[hiscore_idx].rule = -1;
1532 scores[hiscore_idx].ifa = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001533
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001534 rcu_read_lock();
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001535
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001536 /* Candidate Source Address (section 4)
1537 * - multicast and link-local destination address,
1538 * the set of candidate source address MUST only
1539 * include addresses assigned to interfaces
1540 * belonging to the same link as the outgoing
1541 * interface.
1542 * (- For site-local destination addresses, the
1543 * set of candidate source addresses MUST only
1544 * include addresses assigned to interfaces
1545 * belonging to the same site as the outgoing
1546 * interface.)
Erik Kline3985e8a2015-07-22 16:38:25 +09001547 * - "It is RECOMMENDED that the candidate source addresses
1548 * be the set of unicast addresses assigned to the
1549 * interface that will be used to send to the destination
1550 * (the 'outgoing' interface)." (RFC 6724)
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001551 */
1552 if (dst_dev) {
Erik Kline3985e8a2015-07-22 16:38:25 +09001553 idev = __in6_dev_get(dst_dev);
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001554 if ((dst_type & IPV6_ADDR_MULTICAST) ||
Erik Kline3985e8a2015-07-22 16:38:25 +09001555 dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL ||
1556 (idev && idev->cnf.use_oif_addrs_only)) {
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001557 use_oif_addr = true;
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001558 }
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001559 }
1560
1561 if (use_oif_addr) {
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001562 if (idev)
YOSHIFUJI Hideakic15df302015-07-16 16:51:30 +09001563 hiscore_idx = __ipv6_dev_get_saddr(net, &dst, idev, scores, hiscore_idx);
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001564 } else {
1565 for_each_netdev_rcu(net, dev) {
1566 idev = __in6_dev_get(dev);
1567 if (!idev)
1568 continue;
YOSHIFUJI Hideakic15df302015-07-16 16:51:30 +09001569 hiscore_idx = __ipv6_dev_get_saddr(net, &dst, idev, scores, hiscore_idx);
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001570 }
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001571 }
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001572 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001573
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001574 hiscore = &scores[hiscore_idx];
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001575 if (!hiscore->ifa)
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001576 return -EADDRNOTAVAIL;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001577
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +00001578 *saddr = hiscore->ifa->addr;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001579 in6_ifa_put(hiscore->ifa);
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001580 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001581}
YOSHIFUJI Hideaki5e5f3f02008-03-03 21:44:34 +09001582EXPORT_SYMBOL(ipv6_dev_get_saddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001583
Amerigo Wang89657792013-06-29 21:30:49 +08001584int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr,
Jiri Pirko479840f2013-12-06 09:45:21 +01001585 u32 banned_flags)
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02001586{
1587 struct inet6_ifaddr *ifp;
1588 int err = -EADDRNOTAVAIL;
1589
Hannes Frederic Sowa602582c2014-01-19 21:58:19 +01001590 list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) {
1591 if (ifp->scope > IFA_LINK)
1592 break;
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02001593 if (ifp->scope == IFA_LINK &&
1594 !(ifp->flags & banned_flags)) {
1595 *addr = ifp->addr;
1596 err = 0;
1597 break;
1598 }
1599 }
1600 return err;
1601}
1602
Neil Horman95c385b2007-04-25 17:08:10 -07001603int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
Jiri Pirko479840f2013-12-06 09:45:21 +01001604 u32 banned_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001605{
1606 struct inet6_dev *idev;
1607 int err = -EADDRNOTAVAIL;
1608
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001609 rcu_read_lock();
Stephen Hemmingere21e8462010-03-20 16:09:01 -07001610 idev = __in6_dev_get(dev);
1611 if (idev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001612 read_lock_bh(&idev->lock);
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02001613 err = __ipv6_get_lladdr(idev, addr, banned_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001614 read_unlock_bh(&idev->lock);
1615 }
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001616 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001617 return err;
1618}
1619
1620static int ipv6_count_addresses(struct inet6_dev *idev)
1621{
1622 int cnt = 0;
1623 struct inet6_ifaddr *ifp;
1624
1625 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00001626 list_for_each_entry(ifp, &idev->addr_list, if_list)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001627 cnt++;
1628 read_unlock_bh(&idev->lock);
1629 return cnt;
1630}
1631
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001632int ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
Florian Westphal2a7851b2013-05-17 03:56:10 +00001633 const struct net_device *dev, int strict)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001634{
Erik Klinec58da4c2015-02-04 20:01:23 +09001635 return ipv6_chk_addr_and_flags(net, addr, dev, strict, IFA_F_TENTATIVE);
1636}
1637EXPORT_SYMBOL(ipv6_chk_addr);
1638
1639int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
1640 const struct net_device *dev, int strict,
1641 u32 banned_flags)
1642{
Stephen Hemmingereedf0422010-05-17 22:27:12 -07001643 struct inet6_ifaddr *ifp;
Eric Dumazetddbe5032012-07-18 08:11:12 +00001644 unsigned int hash = inet6_addr_hash(addr);
Erik Klinec58da4c2015-02-04 20:01:23 +09001645 u32 ifp_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001646
stephen hemminger5c578aed2010-03-17 20:31:11 +00001647 rcu_read_lock_bh();
Sasha Levinb67bfe02013-02-27 17:06:00 -08001648 hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09001649 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcanobfeade02008-01-10 22:43:18 -08001650 continue;
Erik Klinec58da4c2015-02-04 20:01:23 +09001651 /* Decouple optimistic from tentative for evaluation here.
1652 * Ban optimistic addresses explicitly, when required.
1653 */
1654 ifp_flags = (ifp->flags&IFA_F_OPTIMISTIC)
1655 ? (ifp->flags&~IFA_F_TENTATIVE)
1656 : ifp->flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001657 if (ipv6_addr_equal(&ifp->addr, addr) &&
Erik Klinec58da4c2015-02-04 20:01:23 +09001658 !(ifp_flags&banned_flags) &&
Ian Morris63159f22015-03-29 14:00:04 +01001659 (!dev || ifp->idev->dev == dev ||
Stephen Hemmingereedf0422010-05-17 22:27:12 -07001660 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) {
1661 rcu_read_unlock_bh();
1662 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001663 }
1664 }
stephen hemminger5c578aed2010-03-17 20:31:11 +00001665
Stephen Hemmingereedf0422010-05-17 22:27:12 -07001666 rcu_read_unlock_bh();
1667 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001668}
Erik Klinec58da4c2015-02-04 20:01:23 +09001669EXPORT_SYMBOL(ipv6_chk_addr_and_flags);
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +09001670
David S. Miller3e81c6d2010-03-20 16:18:00 -07001671static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
1672 struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001673{
Eric Dumazetddbe5032012-07-18 08:11:12 +00001674 unsigned int hash = inet6_addr_hash(addr);
stephen hemmingerc2e21292010-03-17 20:31:10 +00001675 struct inet6_ifaddr *ifp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001676
Sasha Levinb67bfe02013-02-27 17:06:00 -08001677 hlist_for_each_entry(ifp, &inet6_addr_lst[hash], addr_lst) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09001678 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcano06bfe652008-01-10 22:43:42 -08001679 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001680 if (ipv6_addr_equal(&ifp->addr, addr)) {
Ian Morris63159f22015-03-29 14:00:04 +01001681 if (!dev || ifp->idev->dev == dev)
David S. Miller3e81c6d2010-03-20 16:18:00 -07001682 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001683 }
1684 }
David S. Miller3e81c6d2010-03-20 16:18:00 -07001685 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001686}
1687
Catalin\(ux\) M. BOIE7df37ff2013-09-23 23:04:19 +03001688/* Compares an address/prefix_len with addresses on device @dev.
1689 * If one is found it returns true.
1690 */
1691bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
1692 const unsigned int prefix_len, struct net_device *dev)
1693{
1694 struct inet6_dev *idev;
1695 struct inet6_ifaddr *ifa;
1696 bool ret = false;
1697
1698 rcu_read_lock();
1699 idev = __in6_dev_get(dev);
1700 if (idev) {
1701 read_lock_bh(&idev->lock);
1702 list_for_each_entry(ifa, &idev->addr_list, if_list) {
1703 ret = ipv6_prefix_equal(addr, &ifa->addr, prefix_len);
1704 if (ret)
1705 break;
1706 }
1707 read_unlock_bh(&idev->lock);
1708 }
1709 rcu_read_unlock();
1710
1711 return ret;
1712}
1713EXPORT_SYMBOL(ipv6_chk_custom_prefix);
1714
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001715int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev)
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -04001716{
1717 struct inet6_dev *idev;
1718 struct inet6_ifaddr *ifa;
1719 int onlink;
1720
1721 onlink = 0;
1722 rcu_read_lock();
1723 idev = __in6_dev_get(dev);
1724 if (idev) {
1725 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00001726 list_for_each_entry(ifa, &idev->addr_list, if_list) {
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -04001727 onlink = ipv6_prefix_equal(addr, &ifa->addr,
1728 ifa->prefix_len);
1729 if (onlink)
1730 break;
1731 }
1732 read_unlock_bh(&idev->lock);
1733 }
1734 rcu_read_unlock();
1735 return onlink;
1736}
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -04001737EXPORT_SYMBOL(ipv6_chk_prefix);
1738
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +09001739struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr,
Daniel Lezcano1cab3da2008-01-10 22:44:09 -08001740 struct net_device *dev, int strict)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001741{
David S. Millerb79d1d52010-03-25 21:39:21 -07001742 struct inet6_ifaddr *ifp, *result = NULL;
Eric Dumazetddbe5032012-07-18 08:11:12 +00001743 unsigned int hash = inet6_addr_hash(addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001744
stephen hemminger5c578aed2010-03-17 20:31:11 +00001745 rcu_read_lock_bh();
Sasha Levinb67bfe02013-02-27 17:06:00 -08001746 hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09001747 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcano1cab3da2008-01-10 22:44:09 -08001748 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001749 if (ipv6_addr_equal(&ifp->addr, addr)) {
Ian Morris63159f22015-03-29 14:00:04 +01001750 if (!dev || ifp->idev->dev == dev ||
Linus Torvalds1da177e2005-04-16 15:20:36 -07001751 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
David S. Millerb79d1d52010-03-25 21:39:21 -07001752 result = ifp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001753 in6_ifa_hold(ifp);
1754 break;
1755 }
1756 }
1757 }
stephen hemminger5c578aed2010-03-17 20:31:11 +00001758 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001759
David S. Millerb79d1d52010-03-25 21:39:21 -07001760 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001761}
1762
Linus Torvalds1da177e2005-04-16 15:20:36 -07001763/* Gets referenced address, destroys ifaddr */
1764
Brian Haleycc411d02009-09-09 14:41:32 +00001765static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001766{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001767 if (ifp->flags&IFA_F_PERMANENT) {
1768 spin_lock_bh(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01001769 addrconf_del_dad_work(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001770 ifp->flags |= IFA_F_TENTATIVE;
Brian Haleycc411d02009-09-09 14:41:32 +00001771 if (dad_failed)
1772 ifp->flags |= IFA_F_DADFAILED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001773 spin_unlock_bh(&ifp->lock);
Herbert Xue2577a02010-03-13 12:23:29 -08001774 if (dad_failed)
1775 ipv6_ifa_notify(0, ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001776 in6_ifa_put(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001777 } else if (ifp->flags&IFA_F_TEMPORARY) {
1778 struct inet6_ifaddr *ifpub;
1779 spin_lock_bh(&ifp->lock);
1780 ifpub = ifp->ifpub;
1781 if (ifpub) {
1782 in6_ifa_hold(ifpub);
1783 spin_unlock_bh(&ifp->lock);
1784 ipv6_create_tempaddr(ifpub, ifp);
1785 in6_ifa_put(ifpub);
1786 } else {
1787 spin_unlock_bh(&ifp->lock);
1788 }
1789 ipv6_del_addr(ifp);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01001790 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001791 ipv6_del_addr(ifp);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01001792 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001793}
1794
Herbert Xuf2344a12010-05-18 15:55:27 -07001795static int addrconf_dad_end(struct inet6_ifaddr *ifp)
1796{
1797 int err = -ENOENT;
1798
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01001799 spin_lock_bh(&ifp->lock);
Herbert Xuf2344a12010-05-18 15:55:27 -07001800 if (ifp->state == INET6_IFADDR_STATE_DAD) {
1801 ifp->state = INET6_IFADDR_STATE_POSTDAD;
1802 err = 0;
1803 }
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01001804 spin_unlock_bh(&ifp->lock);
Herbert Xuf2344a12010-05-18 15:55:27 -07001805
1806 return err;
1807}
1808
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09001809void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1810{
Hannes Frederic Sowa5f40ef72015-03-23 23:36:04 +01001811 struct in6_addr addr;
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09001812 struct inet6_dev *idev = ifp->idev;
Hannes Frederic Sowa1855b7c2015-03-23 23:36:05 +01001813 struct net *net = dev_net(ifp->idev->dev);
Brian Haley9bdd8d42009-03-18 18:22:48 -07001814
Ursula Braun853dc2e2010-10-24 23:06:43 +00001815 if (addrconf_dad_end(ifp)) {
1816 in6_ifa_put(ifp);
Herbert Xuf2344a12010-05-18 15:55:27 -07001817 return;
Ursula Braun853dc2e2010-10-24 23:06:43 +00001818 }
Herbert Xuf2344a12010-05-18 15:55:27 -07001819
Joe Perchese87cc472012-05-13 21:56:26 +00001820 net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n",
1821 ifp->idev->dev->name, &ifp->addr);
Brian Haley9bdd8d42009-03-18 18:22:48 -07001822
Hannes Frederic Sowa5f40ef72015-03-23 23:36:04 +01001823 spin_lock_bh(&ifp->lock);
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09001824
Hannes Frederic Sowa5f40ef72015-03-23 23:36:04 +01001825 if (ifp->flags & IFA_F_STABLE_PRIVACY) {
1826 int scope = ifp->scope;
1827 u32 flags = ifp->flags;
1828 struct in6_addr new_addr;
1829 struct inet6_ifaddr *ifp2;
1830 u32 valid_lft, preferred_lft;
1831 int pfxlen = ifp->prefix_len;
Hannes Frederic Sowa5f40ef72015-03-23 23:36:04 +01001832 int retries = ifp->stable_privacy_retry + 1;
1833
Hannes Frederic Sowa1855b7c2015-03-23 23:36:05 +01001834 if (retries > net->ipv6.sysctl.idgen_retries) {
Hannes Frederic Sowa5f40ef72015-03-23 23:36:04 +01001835 net_info_ratelimited("%s: privacy stable address generation failed because of DAD conflicts!\n",
1836 ifp->idev->dev->name);
1837 goto errdad;
1838 }
1839
1840 new_addr = ifp->addr;
1841 if (ipv6_generate_stable_address(&new_addr, retries,
1842 idev))
1843 goto errdad;
1844
1845 valid_lft = ifp->valid_lft;
1846 preferred_lft = ifp->prefered_lft;
1847
1848 spin_unlock_bh(&ifp->lock);
1849
1850 if (idev->cnf.max_addresses &&
1851 ipv6_count_addresses(idev) >=
1852 idev->cnf.max_addresses)
1853 goto lock_errdad;
1854
1855 net_info_ratelimited("%s: generating new stable privacy address because of DAD conflict\n",
1856 ifp->idev->dev->name);
1857
1858 ifp2 = ipv6_add_addr(idev, &new_addr, NULL, pfxlen,
1859 scope, flags, valid_lft,
1860 preferred_lft);
1861 if (IS_ERR(ifp2))
1862 goto lock_errdad;
1863
1864 spin_lock_bh(&ifp2->lock);
1865 ifp2->stable_privacy_retry = retries;
1866 ifp2->state = INET6_IFADDR_STATE_PREDAD;
1867 spin_unlock_bh(&ifp2->lock);
1868
Hannes Frederic Sowa1855b7c2015-03-23 23:36:05 +01001869 addrconf_mod_dad_work(ifp2, net->ipv6.sysctl.idgen_delay);
Hannes Frederic Sowa5f40ef72015-03-23 23:36:04 +01001870 in6_ifa_put(ifp2);
1871lock_errdad:
1872 spin_lock_bh(&ifp->lock);
1873 } else if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) {
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09001874 addr.s6_addr32[0] = htonl(0xfe800000);
1875 addr.s6_addr32[1] = 0;
1876
1877 if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) &&
1878 ipv6_addr_equal(&ifp->addr, &addr)) {
1879 /* DAD failed for link-local based on MAC address */
1880 idev->cnf.disable_ipv6 = 1;
Brian Haley9bdd8d42009-03-18 18:22:48 -07001881
Joe Perchesf3213832012-05-15 14:11:53 +00001882 pr_info("%s: IPv6 being disabled!\n",
Brian Haley9bdd8d42009-03-18 18:22:48 -07001883 ifp->idev->dev->name);
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09001884 }
1885 }
1886
Hannes Frederic Sowa5f40ef72015-03-23 23:36:04 +01001887errdad:
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01001888 /* transition from _POSTDAD to _ERRDAD */
1889 ifp->state = INET6_IFADDR_STATE_ERRDAD;
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01001890 spin_unlock_bh(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01001891
1892 addrconf_mod_dad_work(ifp, 0);
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09001893}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001894
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +02001895/* Join to solicited addr multicast group.
1896 * caller must hold RTNL */
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001897void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001898{
1899 struct in6_addr maddr;
1900
1901 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1902 return;
1903
1904 addrconf_addr_solict_mult(addr, &maddr);
1905 ipv6_dev_mc_inc(dev, &maddr);
1906}
1907
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +02001908/* caller must hold RTNL */
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001909void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001910{
1911 struct in6_addr maddr;
1912
1913 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1914 return;
1915
1916 addrconf_addr_solict_mult(addr, &maddr);
1917 __ipv6_dev_mc_dec(idev, &maddr);
1918}
1919
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +02001920/* caller must hold RTNL */
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03001921static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001922{
1923 struct in6_addr addr;
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01001924
Hannes Frederic Sowa88ad3142014-01-06 17:53:14 +01001925 if (ifp->prefix_len >= 127) /* RFC 6164 */
Bjørn Mork2bda8a02011-07-05 23:04:13 +00001926 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001927 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1928 if (ipv6_addr_any(&addr))
1929 return;
WANG Cong013b4d92014-09-11 15:35:11 -07001930 __ipv6_dev_ac_inc(ifp->idev, &addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001931}
1932
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +02001933/* caller must hold RTNL */
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03001934static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001935{
1936 struct in6_addr addr;
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01001937
Hannes Frederic Sowa88ad3142014-01-06 17:53:14 +01001938 if (ifp->prefix_len >= 127) /* RFC 6164 */
YOSHIFUJI Hideaki32019e62011-07-24 11:44:34 +00001939 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001940 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1941 if (ipv6_addr_any(&addr))
1942 return;
1943 __ipv6_dev_ac_dec(ifp->idev, &addr);
1944}
1945
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +00001946static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev)
1947{
1948 if (dev->addr_len != IEEE802154_ADDR_LEN)
1949 return -1;
1950 memcpy(eui, dev->dev_addr, 8);
YOSHIFUJI Hideaki / 吉藤英明5e98a362013-01-28 10:44:29 +00001951 eui[0] ^= 2;
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +00001952 return 0;
1953}
1954
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001955static int addrconf_ifid_ieee1394(u8 *eui, struct net_device *dev)
1956{
1957 union fwnet_hwaddr *ha;
1958
1959 if (dev->addr_len != FWNET_ALEN)
1960 return -1;
1961
1962 ha = (union fwnet_hwaddr *)dev->dev_addr;
1963
1964 memcpy(eui, &ha->uc.uniq_id, sizeof(ha->uc.uniq_id));
1965 eui[0] ^= 2;
1966 return 0;
1967}
1968
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001969static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1970{
1971 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1972 if (dev->addr_len != ARCNET_ALEN)
1973 return -1;
1974 memset(eui, 0, 7);
Eldad Zack8e5e8f32012-04-01 07:49:08 +00001975 eui[7] = *(u8 *)dev->dev_addr;
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001976 return 0;
1977}
1978
1979static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1980{
1981 if (dev->addr_len != INFINIBAND_ALEN)
1982 return -1;
1983 memcpy(eui, dev->dev_addr + 12, 8);
1984 eui[0] |= 2;
1985 return 0;
1986}
1987
stephen hemmingerc61393e2010-10-04 20:17:53 +00001988static int __ipv6_isatap_ifid(u8 *eui, __be32 addr)
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09001989{
Sascha Hlusiak9af28512009-05-19 12:56:51 +00001990 if (addr == 0)
1991 return -1;
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09001992 eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
1993 ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
1994 ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
1995 ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
1996 ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
1997 ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
1998 eui[1] = 0;
1999 eui[2] = 0x5E;
2000 eui[3] = 0xFE;
2001 memcpy(eui + 4, &addr, 4);
2002 return 0;
2003}
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09002004
2005static int addrconf_ifid_sit(u8 *eui, struct net_device *dev)
2006{
2007 if (dev->priv_flags & IFF_ISATAP)
2008 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
2009 return -1;
2010}
2011
stephen hemmingeraee80b52011-06-08 10:44:30 +00002012static int addrconf_ifid_gre(u8 *eui, struct net_device *dev)
2013{
2014 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
2015}
2016
Nicolas Dichtele8377352013-08-20 12:16:06 +02002017static int addrconf_ifid_ip6tnl(u8 *eui, struct net_device *dev)
2018{
2019 memcpy(eui, dev->perm_addr, 3);
2020 memcpy(eui + 5, dev->perm_addr + 3, 3);
2021 eui[3] = 0xFF;
2022 eui[4] = 0xFE;
2023 eui[0] ^= 2;
2024 return 0;
2025}
2026
Linus Torvalds1da177e2005-04-16 15:20:36 -07002027static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
2028{
2029 switch (dev->type) {
2030 case ARPHRD_ETHER:
2031 case ARPHRD_FDDI:
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08002032 return addrconf_ifid_eui48(eui, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002033 case ARPHRD_ARCNET:
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08002034 return addrconf_ifid_arcnet(eui, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002035 case ARPHRD_INFINIBAND:
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08002036 return addrconf_ifid_infiniband(eui, dev);
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11002037 case ARPHRD_SIT:
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09002038 return addrconf_ifid_sit(eui, dev);
stephen hemmingeraee80b52011-06-08 10:44:30 +00002039 case ARPHRD_IPGRE:
2040 return addrconf_ifid_gre(eui, dev);
Jukka Rissanene74bccb2013-12-11 17:05:36 +02002041 case ARPHRD_6LOWPAN:
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +00002042 case ARPHRD_IEEE802154:
2043 return addrconf_ifid_eui64(eui, dev);
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00002044 case ARPHRD_IEEE1394:
2045 return addrconf_ifid_ieee1394(eui, dev);
Nicolas Dichtele8377352013-08-20 12:16:06 +02002046 case ARPHRD_TUNNEL6:
2047 return addrconf_ifid_ip6tnl(eui, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002048 }
2049 return -1;
2050}
2051
2052static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
2053{
2054 int err = -1;
2055 struct inet6_ifaddr *ifp;
2056
2057 read_lock_bh(&idev->lock);
Hannes Frederic Sowa602582c2014-01-19 21:58:19 +01002058 list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) {
2059 if (ifp->scope > IFA_LINK)
2060 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002061 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
2062 memcpy(eui, ifp->addr.s6_addr+8, 8);
2063 err = 0;
2064 break;
2065 }
2066 }
2067 read_unlock_bh(&idev->lock);
2068 return err;
2069}
2070
Linus Torvalds1da177e2005-04-16 15:20:36 -07002071/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00002072static void __ipv6_regen_rndid(struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002073{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002074regen:
YOSHIFUJI Hideaki955189e2006-03-20 16:54:09 -08002075 get_random_bytes(idev->rndid, sizeof(idev->rndid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002076 idev->rndid[0] &= ~0x02;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002077
2078 /*
2079 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
2080 * check if generated address is not inappropriate
2081 *
2082 * - Reserved subnet anycast (RFC 2526)
2083 * 11111101 11....11 1xxxxxxx
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11002084 * - ISATAP (RFC4214) 6.1
Linus Torvalds1da177e2005-04-16 15:20:36 -07002085 * 00-00-5E-FE-xx-xx-xx-xx
2086 * - value 0
2087 * - XXX: already assigned to an address on the device
2088 */
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002089 if (idev->rndid[0] == 0xfd &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07002090 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
2091 (idev->rndid[7]&0x80))
2092 goto regen;
2093 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
2094 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
2095 goto regen;
2096 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
2097 goto regen;
2098 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002099}
2100
2101static void ipv6_regen_rndid(unsigned long data)
2102{
2103 struct inet6_dev *idev = (struct inet6_dev *) data;
2104 unsigned long expires;
2105
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07002106 rcu_read_lock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002107 write_lock_bh(&idev->lock);
2108
2109 if (idev->dead)
2110 goto out;
2111
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00002112 __ipv6_regen_rndid(idev);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002113
Linus Torvalds1da177e2005-04-16 15:20:36 -07002114 expires = jiffies +
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002115 idev->cnf.temp_prefered_lft * HZ -
Jiri Pirko1f9248e2013-12-07 19:26:53 +01002116 idev->cnf.regen_max_retry * idev->cnf.dad_transmits *
2117 NEIGH_VAR(idev->nd_parms, RETRANS_TIME) -
Ben Hutchings784e2712010-06-26 11:42:55 +00002118 idev->cnf.max_desync_factor * HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002119 if (time_before(expires, jiffies)) {
Joe Perchesf3213832012-05-15 14:11:53 +00002120 pr_warn("%s: too short regeneration interval; timer disabled for %s\n",
2121 __func__, idev->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002122 goto out;
2123 }
2124
2125 if (!mod_timer(&idev->regen_timer, expires))
2126 in6_dev_hold(idev);
2127
2128out:
2129 write_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07002130 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002131 in6_dev_put(idev);
2132}
2133
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00002134static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr)
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002135{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002136 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00002137 __ipv6_regen_rndid(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002138}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002139
2140/*
2141 * Add prefix route.
2142 */
2143
2144static void
2145addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
Jamal Hadi Salime431b8c2005-06-18 22:55:31 -07002146 unsigned long expires, u32 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002147{
Thomas Graf86872cb2006-08-22 00:01:08 -07002148 struct fib6_config cfg = {
2149 .fc_table = RT6_TABLE_PREFIX,
2150 .fc_metric = IP6_RT_PRIO_ADDRCONF,
2151 .fc_ifindex = dev->ifindex,
2152 .fc_expires = expires,
2153 .fc_dst_len = plen,
2154 .fc_flags = RTF_UP | flags,
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09002155 .fc_nlinfo.nl_net = dev_net(dev),
Stephen Hemmingerf410a1f2008-08-23 05:16:46 -07002156 .fc_protocol = RTPROT_KERNEL,
Thomas Graf86872cb2006-08-22 00:01:08 -07002157 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07002158
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +00002159 cfg.fc_dst = *pfx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002160
2161 /* Prevent useless cloning on PtP SIT.
2162 This thing is done here expecting that the whole
2163 class of non-broadcast devices need not cloning.
2164 */
Amerigo Wang07a93622012-10-29 16:23:10 +00002165#if IS_ENABLED(CONFIG_IPV6_SIT)
Thomas Graf86872cb2006-08-22 00:01:08 -07002166 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
2167 cfg.fc_flags |= RTF_NONEXTHOP;
Joerg Roedel0be669b2006-10-10 14:49:53 -07002168#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002169
Thomas Graf86872cb2006-08-22 00:01:08 -07002170 ip6_route_add(&cfg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002171}
2172
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002173
2174static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx,
2175 int plen,
2176 const struct net_device *dev,
2177 u32 flags, u32 noflags)
2178{
2179 struct fib6_node *fn;
2180 struct rt6_info *rt = NULL;
2181 struct fib6_table *table;
2182
2183 table = fib6_get_table(dev_net(dev), RT6_TABLE_PREFIX);
Ian Morris63159f22015-03-29 14:00:04 +01002184 if (!table)
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002185 return NULL;
2186
Li RongQing5744dd92012-09-11 21:59:01 +00002187 read_lock_bh(&table->tb6_lock);
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002188 fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0);
2189 if (!fn)
2190 goto out;
Martin KaFai Lau1f56a012015-04-28 13:03:03 -07002191
2192 noflags |= RTF_CACHE;
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002193 for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) {
David S. Millerd1918542011-12-28 20:19:20 -05002194 if (rt->dst.dev->ifindex != dev->ifindex)
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002195 continue;
2196 if ((rt->rt6i_flags & flags) != flags)
2197 continue;
Romain Kuntz85da53b2013-01-09 15:02:26 +01002198 if ((rt->rt6i_flags & noflags) != 0)
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002199 continue;
2200 dst_hold(&rt->dst);
2201 break;
2202 }
2203out:
Li RongQing5744dd92012-09-11 21:59:01 +00002204 read_unlock_bh(&table->tb6_lock);
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002205 return rt;
2206}
2207
2208
Linus Torvalds1da177e2005-04-16 15:20:36 -07002209/* Create "default" multicast route to the interface */
2210
2211static void addrconf_add_mroute(struct net_device *dev)
2212{
Thomas Graf86872cb2006-08-22 00:01:08 -07002213 struct fib6_config cfg = {
2214 .fc_table = RT6_TABLE_LOCAL,
2215 .fc_metric = IP6_RT_PRIO_ADDRCONF,
2216 .fc_ifindex = dev->ifindex,
2217 .fc_dst_len = 8,
2218 .fc_flags = RTF_UP,
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09002219 .fc_nlinfo.nl_net = dev_net(dev),
Thomas Graf86872cb2006-08-22 00:01:08 -07002220 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07002221
Thomas Graf86872cb2006-08-22 00:01:08 -07002222 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
2223
2224 ip6_route_add(&cfg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002225}
2226
Linus Torvalds1da177e2005-04-16 15:20:36 -07002227static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
2228{
2229 struct inet6_dev *idev;
2230
2231 ASSERT_RTNL();
2232
Stephen Hemmingere21e8462010-03-20 16:09:01 -07002233 idev = ipv6_find_idev(dev);
2234 if (!idev)
Brian Haley64e724f2010-07-20 10:34:30 +00002235 return ERR_PTR(-ENOBUFS);
2236
2237 if (idev->cnf.disable_ipv6)
2238 return ERR_PTR(-EACCES);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002239
2240 /* Add default multicast route */
Li Wei4af04ab2011-12-06 21:23:45 +00002241 if (!(dev->flags & IFF_LOOPBACK))
2242 addrconf_add_mroute(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002243
Linus Torvalds1da177e2005-04-16 15:20:36 -07002244 return idev;
2245}
2246
Jiri Pirko53bd6742013-12-06 09:45:22 +01002247static void manage_tempaddrs(struct inet6_dev *idev,
2248 struct inet6_ifaddr *ifp,
2249 __u32 valid_lft, __u32 prefered_lft,
2250 bool create, unsigned long now)
2251{
2252 u32 flags;
2253 struct inet6_ifaddr *ift;
2254
2255 read_lock_bh(&idev->lock);
2256 /* update all temporary addresses in the list */
2257 list_for_each_entry(ift, &idev->tempaddr_list, tmp_list) {
2258 int age, max_valid, max_prefered;
2259
2260 if (ifp != ift->ifpub)
2261 continue;
2262
2263 /* RFC 4941 section 3.3:
2264 * If a received option will extend the lifetime of a public
2265 * address, the lifetimes of temporary addresses should
2266 * be extended, subject to the overall constraint that no
2267 * temporary addresses should ever remain "valid" or "preferred"
2268 * for a time longer than (TEMP_VALID_LIFETIME) or
2269 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), respectively.
2270 */
2271 age = (now - ift->cstamp) / HZ;
2272 max_valid = idev->cnf.temp_valid_lft - age;
2273 if (max_valid < 0)
2274 max_valid = 0;
2275
2276 max_prefered = idev->cnf.temp_prefered_lft -
2277 idev->cnf.max_desync_factor - age;
2278 if (max_prefered < 0)
2279 max_prefered = 0;
2280
2281 if (valid_lft > max_valid)
2282 valid_lft = max_valid;
2283
2284 if (prefered_lft > max_prefered)
2285 prefered_lft = max_prefered;
2286
2287 spin_lock(&ift->lock);
2288 flags = ift->flags;
2289 ift->valid_lft = valid_lft;
2290 ift->prefered_lft = prefered_lft;
2291 ift->tstamp = now;
2292 if (prefered_lft > 0)
2293 ift->flags &= ~IFA_F_DEPRECATED;
2294
2295 spin_unlock(&ift->lock);
2296 if (!(flags&IFA_F_TENTATIVE))
2297 ipv6_ifa_notify(0, ift);
2298 }
2299
2300 if ((create || list_empty(&idev->tempaddr_list)) &&
2301 idev->cnf.use_tempaddr > 0) {
2302 /* When a new public address is created as described
2303 * in [ADDRCONF], also create a new temporary address.
2304 * Also create a temporary address if it's enabled but
2305 * no temporary address currently exists.
2306 */
2307 read_unlock_bh(&idev->lock);
2308 ipv6_create_tempaddr(ifp, NULL);
2309 } else {
2310 read_unlock_bh(&idev->lock);
2311 }
2312}
2313
Neil Hormane6bff992012-01-04 10:49:15 +00002314void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002315{
2316 struct prefix_info *pinfo;
2317 __u32 valid_lft;
2318 __u32 prefered_lft;
2319 int addr_type;
Hannes Frederic Sowa64236f32015-03-23 23:36:02 +01002320 u32 addr_flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002321 struct inet6_dev *in6_dev;
Brian Haley56d417b2009-06-01 03:07:33 -07002322 struct net *net = dev_net(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002323
2324 pinfo = (struct prefix_info *) opt;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002325
Linus Torvalds1da177e2005-04-16 15:20:36 -07002326 if (len < sizeof(struct prefix_info)) {
dingtianhongba3542e2013-08-17 10:27:04 +08002327 ADBG("addrconf: prefix option too short\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002328 return;
2329 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002330
Linus Torvalds1da177e2005-04-16 15:20:36 -07002331 /*
2332 * Validation checks ([ADDRCONF], page 19)
2333 */
2334
2335 addr_type = ipv6_addr_type(&pinfo->prefix);
2336
2337 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
2338 return;
2339
2340 valid_lft = ntohl(pinfo->valid);
2341 prefered_lft = ntohl(pinfo->prefered);
2342
2343 if (prefered_lft > valid_lft) {
Joe Perchese87cc472012-05-13 21:56:26 +00002344 net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002345 return;
2346 }
2347
2348 in6_dev = in6_dev_get(dev);
2349
Ian Morris63159f22015-03-29 14:00:04 +01002350 if (!in6_dev) {
Joe Perchese87cc472012-05-13 21:56:26 +00002351 net_dbg_ratelimited("addrconf: device %s not configured\n",
2352 dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002353 return;
2354 }
2355
2356 /*
2357 * Two things going on here:
2358 * 1) Add routes for on-link prefixes
2359 * 2) Configure prefixes with the auto flag set
2360 */
2361
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002362 if (pinfo->onlink) {
2363 struct rt6_info *rt;
2364 unsigned long rt_expires;
2365
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002366 /* Avoid arithmetic overflow. Really, we could
2367 * save rt_expires in seconds, likely valid_lft,
2368 * but it would require division in fib gc, that it
2369 * not good.
2370 */
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002371 if (HZ > USER_HZ)
2372 rt_expires = addrconf_timeout_fixup(valid_lft, HZ);
2373 else
2374 rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ);
YOSHIFUJI Hideaki3dd4bc62005-12-19 14:02:45 -08002375
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002376 if (addrconf_finite_timeout(rt_expires))
2377 rt_expires *= HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002378
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002379 rt = addrconf_get_prefix_route(&pinfo->prefix,
2380 pinfo->prefix_len,
2381 dev,
2382 RTF_ADDRCONF | RTF_PREFIX_RT,
2383 RTF_GATEWAY | RTF_DEFAULT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002384
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002385 if (rt) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002386 /* Autoconf prefix route */
2387 if (valid_lft == 0) {
2388 ip6_del_rt(rt);
2389 rt = NULL;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002390 } else if (addrconf_finite_timeout(rt_expires)) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002391 /* not infinity */
Gao feng1716a962012-04-06 00:13:10 +00002392 rt6_set_expires(rt, jiffies + rt_expires);
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002393 } else {
Gao feng1716a962012-04-06 00:13:10 +00002394 rt6_clean_expires(rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002395 }
2396 } else if (valid_lft) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002397 clock_t expires = 0;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002398 int flags = RTF_ADDRCONF | RTF_PREFIX_RT;
2399 if (addrconf_finite_timeout(rt_expires)) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002400 /* not infinity */
2401 flags |= RTF_EXPIRES;
2402 expires = jiffies_to_clock_t(rt_expires);
2403 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002404 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002405 dev, expires, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002406 }
Amerigo Wang94e187c2012-10-29 00:13:19 +00002407 ip6_rt_put(rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002408 }
2409
2410 /* Try to figure out our local address for this prefix */
2411
2412 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002413 struct inet6_ifaddr *ifp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002414 struct in6_addr addr;
2415 int create = 0, update_lft = 0;
Daniel Borkmann617fe292013-04-09 03:47:16 +00002416 bool tokenized = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002417
2418 if (pinfo->prefix_len == 64) {
2419 memcpy(&addr, &pinfo->prefix, 8);
Daniel Borkmannf53adae2013-04-08 04:01:30 +00002420
2421 if (!ipv6_addr_any(&in6_dev->token)) {
2422 read_lock_bh(&in6_dev->lock);
2423 memcpy(addr.s6_addr + 8,
2424 in6_dev->token.s6_addr + 8, 8);
2425 read_unlock_bh(&in6_dev->lock);
Daniel Borkmann617fe292013-04-09 03:47:16 +00002426 tokenized = true;
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01002427 } else if (in6_dev->addr_gen_mode ==
2428 IN6_ADDR_GEN_MODE_STABLE_PRIVACY &&
2429 !ipv6_generate_stable_address(&addr, 0,
2430 in6_dev)) {
Hannes Frederic Sowa64236f32015-03-23 23:36:02 +01002431 addr_flags |= IFA_F_STABLE_PRIVACY;
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01002432 goto ok;
Daniel Borkmannf53adae2013-04-08 04:01:30 +00002433 } else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
2434 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002435 in6_dev_put(in6_dev);
2436 return;
2437 }
2438 goto ok;
2439 }
Joe Perchese87cc472012-05-13 21:56:26 +00002440 net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n",
2441 pinfo->prefix_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002442 in6_dev_put(in6_dev);
2443 return;
2444
2445ok:
2446
YOSHIFUJI Hideaki53b79972008-07-19 22:35:03 -07002447 ifp = ipv6_get_ifaddr(net, &addr, dev, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002448
Ian Morris63159f22015-03-29 14:00:04 +01002449 if (!ifp && valid_lft) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002450 int max_addresses = in6_dev->cnf.max_addresses;
Neil Horman95c385b2007-04-25 17:08:10 -07002451
2452#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2453 if (in6_dev->cnf.optimistic_dad &&
Neil Hormane6bff992012-01-04 10:49:15 +00002454 !net->ipv6.devconf_all->forwarding && sllao)
Neil Horman95c385b2007-04-25 17:08:10 -07002455 addr_flags = IFA_F_OPTIMISTIC;
2456#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002457
2458 /* Do not allow to create too much of autoconfigured
2459 * addresses; this would be too easy way to crash kernel.
2460 */
2461 if (!max_addresses ||
2462 ipv6_count_addresses(in6_dev) < max_addresses)
Jiri Pirko3f8f5292013-08-01 10:41:27 +02002463 ifp = ipv6_add_addr(in6_dev, &addr, NULL,
2464 pinfo->prefix_len,
Neil Horman95c385b2007-04-25 17:08:10 -07002465 addr_type&IPV6_ADDR_SCOPE_MASK,
Jiri Benc8a226b22013-08-01 10:41:28 +02002466 addr_flags, valid_lft,
2467 prefered_lft);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002468
YOSHIFUJI Hideaki / 吉藤英明3f0d2ba2013-01-22 06:32:54 +00002469 if (IS_ERR_OR_NULL(ifp)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002470 in6_dev_put(in6_dev);
2471 return;
2472 }
2473
Jiri Benc8a226b22013-08-01 10:41:28 +02002474 update_lft = 0;
2475 create = 1;
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01002476 spin_lock_bh(&ifp->lock);
2477 ifp->flags |= IFA_F_MANAGETEMPADDR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002478 ifp->cstamp = jiffies;
Daniel Borkmann617fe292013-04-09 03:47:16 +00002479 ifp->tokenized = tokenized;
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01002480 spin_unlock_bh(&ifp->lock);
David S. Millercf22f9a2012-04-14 21:37:40 -04002481 addrconf_dad_start(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002482 }
2483
2484 if (ifp) {
Jiri Pirko479840f2013-12-06 09:45:21 +01002485 u32 flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002486 unsigned long now;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002487 u32 stored_lft;
2488
2489 /* update lifetime (RFC2462 5.5.3 e) */
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01002490 spin_lock_bh(&ifp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002491 now = jiffies;
2492 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
2493 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
2494 else
2495 stored_lft = 0;
Jiri Benc8a226b22013-08-01 10:41:28 +02002496 if (!update_lft && !create && stored_lft) {
Fabian Frederick9451a302014-10-27 19:11:56 +01002497 const u32 minimum_lft = min_t(u32,
2498 stored_lft, MIN_VALID_LIFETIME);
Paul Marksc9d55d52013-09-25 15:12:55 -07002499 valid_lft = max(valid_lft, minimum_lft);
2500
2501 /* RFC4862 Section 5.5.3e:
2502 * "Note that the preferred lifetime of the
2503 * corresponding address is always reset to
2504 * the Preferred Lifetime in the received
2505 * Prefix Information option, regardless of
2506 * whether the valid lifetime is also reset or
2507 * ignored."
2508 *
2509 * So we should always update prefered_lft here.
2510 */
2511 update_lft = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002512 }
2513
2514 if (update_lft) {
2515 ifp->valid_lft = valid_lft;
2516 ifp->prefered_lft = prefered_lft;
2517 ifp->tstamp = now;
2518 flags = ifp->flags;
2519 ifp->flags &= ~IFA_F_DEPRECATED;
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01002520 spin_unlock_bh(&ifp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002521
2522 if (!(flags&IFA_F_TENTATIVE))
2523 ipv6_ifa_notify(0, ifp);
2524 } else
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01002525 spin_unlock_bh(&ifp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002526
Jiri Pirko53bd6742013-12-06 09:45:22 +01002527 manage_tempaddrs(in6_dev, ifp, valid_lft, prefered_lft,
2528 create, now);
David S. Miller5d9efa72013-10-28 20:07:50 -04002529
Linus Torvalds1da177e2005-04-16 15:20:36 -07002530 in6_ifa_put(ifp);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01002531 addrconf_verify();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002532 }
2533 }
2534 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
2535 in6_dev_put(in6_dev);
2536}
2537
2538/*
2539 * Set destination address.
2540 * Special case for SIT interfaces where we create a new "virtual"
2541 * device.
2542 */
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002543int addrconf_set_dstaddr(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002544{
2545 struct in6_ifreq ireq;
2546 struct net_device *dev;
2547 int err = -EINVAL;
2548
2549 rtnl_lock();
2550
2551 err = -EFAULT;
2552 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2553 goto err_exit;
2554
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002555 dev = __dev_get_by_index(net, ireq.ifr6_ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002556
2557 err = -ENODEV;
Ian Morris63159f22015-03-29 14:00:04 +01002558 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002559 goto err_exit;
2560
Amerigo Wang07a93622012-10-29 16:23:10 +00002561#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002562 if (dev->type == ARPHRD_SIT) {
Stephen Hemminger5bc3eb72008-11-19 21:52:05 -08002563 const struct net_device_ops *ops = dev->netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002564 struct ifreq ifr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002565 struct ip_tunnel_parm p;
2566
2567 err = -EADDRNOTAVAIL;
2568 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
2569 goto err_exit;
2570
2571 memset(&p, 0, sizeof(p));
2572 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
2573 p.iph.saddr = 0;
2574 p.iph.version = 4;
2575 p.iph.ihl = 5;
2576 p.iph.protocol = IPPROTO_IPV6;
2577 p.iph.ttl = 64;
Stephen Hemmingerd20b3102008-01-21 00:48:43 -08002578 ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002579
Stephen Hemminger5bc3eb72008-11-19 21:52:05 -08002580 if (ops->ndo_do_ioctl) {
2581 mm_segment_t oldfs = get_fs();
2582
2583 set_fs(KERNEL_DS);
2584 err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL);
2585 set_fs(oldfs);
2586 } else
2587 err = -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002588
2589 if (err == 0) {
2590 err = -ENOBUFS;
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002591 dev = __dev_get_by_name(net, p.name);
2592 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002593 goto err_exit;
2594 err = dev_open(dev);
2595 }
2596 }
Joerg Roedel0be669b2006-10-10 14:49:53 -07002597#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002598
2599err_exit:
2600 rtnl_unlock();
2601 return err;
2602}
2603
Madhu Challa93a714d2015-02-25 09:58:35 -08002604static int ipv6_mc_config(struct sock *sk, bool join,
2605 const struct in6_addr *addr, int ifindex)
2606{
2607 int ret;
2608
2609 ASSERT_RTNL();
2610
2611 lock_sock(sk);
2612 if (join)
Marcelo Ricardo Leitner54ff9ef2015-03-18 14:50:43 -03002613 ret = ipv6_sock_mc_join(sk, ifindex, addr);
Madhu Challa93a714d2015-02-25 09:58:35 -08002614 else
Marcelo Ricardo Leitner54ff9ef2015-03-18 14:50:43 -03002615 ret = ipv6_sock_mc_drop(sk, ifindex, addr);
Madhu Challa93a714d2015-02-25 09:58:35 -08002616 release_sock(sk);
2617
2618 return ret;
2619}
2620
Linus Torvalds1da177e2005-04-16 15:20:36 -07002621/*
2622 * Manual configuration of address on an interface
2623 */
Jiri Pirko479840f2013-12-06 09:45:21 +01002624static int inet6_addr_add(struct net *net, int ifindex,
2625 const struct in6_addr *pfx,
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00002626 const struct in6_addr *peer_pfx,
Jiri Pirko479840f2013-12-06 09:45:21 +01002627 unsigned int plen, __u32 ifa_flags,
2628 __u32 prefered_lft, __u32 valid_lft)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002629{
2630 struct inet6_ifaddr *ifp;
2631 struct inet6_dev *idev;
2632 struct net_device *dev;
Madhu Challa93a714d2015-02-25 09:58:35 -08002633 unsigned long timeout;
2634 clock_t expires;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002635 int scope;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002636 u32 flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002637
2638 ASSERT_RTNL();
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002639
Thomas Graf24ef0da2008-05-28 16:54:22 +02002640 if (plen > 128)
2641 return -EINVAL;
2642
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002643 /* check the lifetime */
2644 if (!valid_lft || prefered_lft > valid_lft)
2645 return -EINVAL;
2646
Jiri Pirko53bd6742013-12-06 09:45:22 +01002647 if (ifa_flags & IFA_F_MANAGETEMPADDR && plen != 64)
2648 return -EINVAL;
2649
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002650 dev = __dev_get_by_index(net, ifindex);
2651 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002652 return -ENODEV;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002653
Brian Haley64e724f2010-07-20 10:34:30 +00002654 idev = addrconf_add_dev(dev);
2655 if (IS_ERR(idev))
2656 return PTR_ERR(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002657
Madhu Challa93a714d2015-02-25 09:58:35 -08002658 if (ifa_flags & IFA_F_MCAUTOJOIN) {
2659 int ret = ipv6_mc_config(net->ipv6.mc_autojoin_sk,
2660 true, pfx, ifindex);
2661
2662 if (ret < 0)
2663 return ret;
2664 }
2665
Linus Torvalds1da177e2005-04-16 15:20:36 -07002666 scope = ipv6_addr_scope(pfx);
2667
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002668 timeout = addrconf_timeout_fixup(valid_lft, HZ);
2669 if (addrconf_finite_timeout(timeout)) {
2670 expires = jiffies_to_clock_t(timeout * HZ);
2671 valid_lft = timeout;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002672 flags = RTF_EXPIRES;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002673 } else {
2674 expires = 0;
2675 flags = 0;
2676 ifa_flags |= IFA_F_PERMANENT;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002677 }
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002678
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002679 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
2680 if (addrconf_finite_timeout(timeout)) {
2681 if (timeout == 0)
2682 ifa_flags |= IFA_F_DEPRECATED;
2683 prefered_lft = timeout;
2684 }
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002685
Jiri Benc8a226b22013-08-01 10:41:28 +02002686 ifp = ipv6_add_addr(idev, pfx, peer_pfx, plen, scope, ifa_flags,
2687 valid_lft, prefered_lft);
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002688
Linus Torvalds1da177e2005-04-16 15:20:36 -07002689 if (!IS_ERR(ifp)) {
Thomas Haller761aac72014-01-15 15:36:58 +01002690 if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) {
2691 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
2692 expires, flags);
2693 }
2694
Neil Horman95c385b2007-04-25 17:08:10 -07002695 /*
2696 * Note that section 3.1 of RFC 4429 indicates
2697 * that the Optimistic flag should not be set for
2698 * manually configured addresses
2699 */
David S. Millercf22f9a2012-04-14 21:37:40 -04002700 addrconf_dad_start(ifp);
Jiri Pirko53bd6742013-12-06 09:45:22 +01002701 if (ifa_flags & IFA_F_MANAGETEMPADDR)
2702 manage_tempaddrs(idev, ifp, valid_lft, prefered_lft,
2703 true, jiffies);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002704 in6_ifa_put(ifp);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01002705 addrconf_verify_rtnl();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002706 return 0;
Madhu Challa93a714d2015-02-25 09:58:35 -08002707 } else if (ifa_flags & IFA_F_MCAUTOJOIN) {
2708 ipv6_mc_config(net->ipv6.mc_autojoin_sk,
2709 false, pfx, ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002710 }
2711
2712 return PTR_ERR(ifp);
2713}
2714
Heiner Kallweit6046d5b2014-04-20 21:29:36 +02002715static int inet6_addr_del(struct net *net, int ifindex, u32 ifa_flags,
2716 const struct in6_addr *pfx, unsigned int plen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002717{
2718 struct inet6_ifaddr *ifp;
2719 struct inet6_dev *idev;
2720 struct net_device *dev;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002721
Thomas Graf24ef0da2008-05-28 16:54:22 +02002722 if (plen > 128)
2723 return -EINVAL;
2724
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002725 dev = __dev_get_by_index(net, ifindex);
2726 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002727 return -ENODEV;
2728
Ian Morrise5d08d72014-11-23 21:28:43 +00002729 idev = __in6_dev_get(dev);
Ian Morris63159f22015-03-29 14:00:04 +01002730 if (!idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002731 return -ENXIO;
2732
2733 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00002734 list_for_each_entry(ifp, &idev->addr_list, if_list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002735 if (ifp->prefix_len == plen &&
2736 ipv6_addr_equal(pfx, &ifp->addr)) {
2737 in6_ifa_hold(ifp);
2738 read_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002739
Heiner Kallweit6046d5b2014-04-20 21:29:36 +02002740 if (!(ifp->flags & IFA_F_TEMPORARY) &&
2741 (ifa_flags & IFA_F_MANAGETEMPADDR))
2742 manage_tempaddrs(idev, ifp, 0, 0, false,
2743 jiffies);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002744 ipv6_del_addr(ifp);
Heiner Kallweit6046d5b2014-04-20 21:29:36 +02002745 addrconf_verify_rtnl();
Madhu Challa93a714d2015-02-25 09:58:35 -08002746 if (ipv6_addr_is_multicast(pfx)) {
2747 ipv6_mc_config(net->ipv6.mc_autojoin_sk,
2748 false, pfx, dev->ifindex);
2749 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002750 return 0;
2751 }
2752 }
2753 read_unlock_bh(&idev->lock);
2754 return -EADDRNOTAVAIL;
2755}
2756
2757
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002758int addrconf_add_ifaddr(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002759{
2760 struct in6_ifreq ireq;
2761 int err;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002762
Eric W. Biedermanaf31f412012-11-16 03:03:06 +00002763 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002764 return -EPERM;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002765
Linus Torvalds1da177e2005-04-16 15:20:36 -07002766 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2767 return -EFAULT;
2768
2769 rtnl_lock();
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00002770 err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, NULL,
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002771 ireq.ifr6_prefixlen, IFA_F_PERMANENT,
2772 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002773 rtnl_unlock();
2774 return err;
2775}
2776
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002777int addrconf_del_ifaddr(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002778{
2779 struct in6_ifreq ireq;
2780 int err;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002781
Eric W. Biedermanaf31f412012-11-16 03:03:06 +00002782 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002783 return -EPERM;
2784
2785 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2786 return -EFAULT;
2787
2788 rtnl_lock();
Heiner Kallweit6046d5b2014-04-20 21:29:36 +02002789 err = inet6_addr_del(net, ireq.ifr6_ifindex, 0, &ireq.ifr6_addr,
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002790 ireq.ifr6_prefixlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002791 rtnl_unlock();
2792 return err;
2793}
2794
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002795static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
2796 int plen, int scope)
2797{
2798 struct inet6_ifaddr *ifp;
2799
Jiri Benc8a226b22013-08-01 10:41:28 +02002800 ifp = ipv6_add_addr(idev, addr, NULL, plen,
Hannes Frederic Sowa07edd742014-01-08 15:43:22 +01002801 scope, IFA_F_PERMANENT,
2802 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002803 if (!IS_ERR(ifp)) {
2804 spin_lock_bh(&ifp->lock);
2805 ifp->flags &= ~IFA_F_TENTATIVE;
2806 spin_unlock_bh(&ifp->lock);
2807 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2808 in6_ifa_put(ifp);
2809 }
2810}
2811
Amerigo Wang07a93622012-10-29 16:23:10 +00002812#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002813static void sit_add_v4_addrs(struct inet6_dev *idev)
2814{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002815 struct in6_addr addr;
2816 struct net_device *dev;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09002817 struct net *net = dev_net(idev->dev);
Nicolas Dichtel929c9cf2013-11-14 13:51:05 +01002818 int scope, plen;
Nicolas Dichtelf0e2acf2013-11-14 13:51:06 +01002819 u32 pflags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002820
2821 ASSERT_RTNL();
2822
2823 memset(&addr, 0, sizeof(struct in6_addr));
2824 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2825
2826 if (idev->dev->flags&IFF_POINTOPOINT) {
2827 addr.s6_addr32[0] = htonl(0xfe800000);
2828 scope = IFA_LINK;
Nicolas Dichtel929c9cf2013-11-14 13:51:05 +01002829 plen = 64;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002830 } else {
2831 scope = IPV6_ADDR_COMPATv4;
Nicolas Dichtel929c9cf2013-11-14 13:51:05 +01002832 plen = 96;
Nicolas Dichtelf0e2acf2013-11-14 13:51:06 +01002833 pflags |= RTF_NONEXTHOP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002834 }
2835
2836 if (addr.s6_addr32[3]) {
Nicolas Dichtel929c9cf2013-11-14 13:51:05 +01002837 add_addr(idev, &addr, plen, scope);
Nicolas Dichtelf0e2acf2013-11-14 13:51:06 +01002838 addrconf_prefix_route(&addr, plen, idev->dev, 0, pflags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002839 return;
2840 }
2841
Benjamin Thery6fda7352008-03-05 10:47:47 -08002842 for_each_netdev(net, dev) {
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002843 struct in_device *in_dev = __in_dev_get_rtnl(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002844 if (in_dev && (dev->flags & IFF_UP)) {
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002845 struct in_ifaddr *ifa;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002846
2847 int flag = scope;
2848
2849 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002850
2851 addr.s6_addr32[3] = ifa->ifa_local;
2852
2853 if (ifa->ifa_scope == RT_SCOPE_LINK)
2854 continue;
2855 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2856 if (idev->dev->flags&IFF_POINTOPOINT)
2857 continue;
2858 flag |= IFA_HOST;
2859 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002860
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002861 add_addr(idev, &addr, plen, flag);
Nicolas Dichtelf0e2acf2013-11-14 13:51:06 +01002862 addrconf_prefix_route(&addr, plen, idev->dev, 0,
2863 pflags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002864 }
2865 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002866 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002867}
Joerg Roedel0be669b2006-10-10 14:49:53 -07002868#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002869
2870static void init_loopback(struct net_device *dev)
2871{
2872 struct inet6_dev *idev;
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05302873 struct net_device *sp_dev;
2874 struct inet6_ifaddr *sp_ifa;
2875 struct rt6_info *sp_rt;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002876
2877 /* ::1 */
2878
2879 ASSERT_RTNL();
2880
Ian Morrise5d08d72014-11-23 21:28:43 +00002881 idev = ipv6_find_idev(dev);
Ian Morris63159f22015-03-29 14:00:04 +01002882 if (!idev) {
Joe Perches91df42b2012-05-15 14:11:54 +00002883 pr_debug("%s: add_dev failed\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002884 return;
2885 }
2886
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002887 add_addr(idev, &in6addr_loopback, 128, IFA_HOST);
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05302888
2889 /* Add routes to other interface's IPv6 addresses */
2890 for_each_netdev(dev_net(dev), sp_dev) {
2891 if (!strcmp(sp_dev->name, dev->name))
2892 continue;
2893
2894 idev = __in6_dev_get(sp_dev);
2895 if (!idev)
2896 continue;
2897
2898 read_lock_bh(&idev->lock);
2899 list_for_each_entry(sp_ifa, &idev->addr_list, if_list) {
2900
2901 if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE))
2902 continue;
2903
Gao feng33d99112014-01-24 16:29:11 +08002904 if (sp_ifa->rt) {
2905 /* This dst has been added to garbage list when
2906 * lo device down, release this obsolete dst and
2907 * reallocate a new router for ifa.
2908 */
2909 if (sp_ifa->rt->dst.obsolete > 0) {
2910 ip6_rt_put(sp_ifa->rt);
2911 sp_ifa->rt = NULL;
2912 } else {
2913 continue;
2914 }
2915 }
Gao fenga881ae12013-06-16 11:14:30 +08002916
François-Xavier Le Bail57ec0af2013-12-02 11:28:49 +01002917 sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, false);
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05302918
2919 /* Failure cases are ignored */
Gao feng534c8772013-06-02 22:16:21 +00002920 if (!IS_ERR(sp_rt)) {
2921 sp_ifa->rt = sp_rt;
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05302922 ip6_ins_rt(sp_rt);
Gao feng534c8772013-06-02 22:16:21 +00002923 }
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05302924 }
2925 read_unlock_bh(&idev->lock);
2926 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002927}
2928
Hannes Frederic Sowa64236f32015-03-23 23:36:02 +01002929static void addrconf_add_linklocal(struct inet6_dev *idev,
2930 const struct in6_addr *addr, u32 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002931{
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002932 struct inet6_ifaddr *ifp;
Hannes Frederic Sowa64236f32015-03-23 23:36:02 +01002933 u32 addr_flags = flags | IFA_F_PERMANENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002934
Neil Horman95c385b2007-04-25 17:08:10 -07002935#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2936 if (idev->cnf.optimistic_dad &&
David Miller702beb82008-07-20 18:17:02 -07002937 !dev_net(idev->dev)->ipv6.devconf_all->forwarding)
Neil Horman95c385b2007-04-25 17:08:10 -07002938 addr_flags |= IFA_F_OPTIMISTIC;
2939#endif
2940
Hannes Frederic Sowa07edd742014-01-08 15:43:22 +01002941 ifp = ipv6_add_addr(idev, addr, NULL, 64, IFA_LINK, addr_flags,
2942 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002943 if (!IS_ERR(ifp)) {
YOSHIFUJI Hideaki46d48042007-02-07 20:36:26 +09002944 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
David S. Millercf22f9a2012-04-14 21:37:40 -04002945 addrconf_dad_start(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002946 in6_ifa_put(ifp);
2947 }
2948}
2949
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01002950static bool ipv6_reserved_interfaceid(struct in6_addr address)
2951{
2952 if ((address.s6_addr32[2] | address.s6_addr32[3]) == 0)
2953 return true;
2954
2955 if (address.s6_addr32[2] == htonl(0x02005eff) &&
2956 ((address.s6_addr32[3] & htonl(0xfe000000)) == htonl(0xfe000000)))
2957 return true;
2958
2959 if (address.s6_addr32[2] == htonl(0xfdffffff) &&
2960 ((address.s6_addr32[3] & htonl(0xffffff80)) == htonl(0xffffff80)))
2961 return true;
2962
2963 return false;
2964}
2965
2966static int ipv6_generate_stable_address(struct in6_addr *address,
2967 u8 dad_count,
2968 const struct inet6_dev *idev)
2969{
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01002970 static DEFINE_SPINLOCK(lock);
2971 static __u32 digest[SHA_DIGEST_WORDS];
2972 static __u32 workspace[SHA_WORKSPACE_WORDS];
2973
2974 static union {
2975 char __data[SHA_MESSAGE_BYTES];
2976 struct {
2977 struct in6_addr secret;
Hannes Frederic Sowaff402172015-03-24 11:05:28 +01002978 __be32 prefix[2];
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01002979 unsigned char hwaddr[MAX_ADDR_LEN];
2980 u8 dad_count;
2981 } __packed;
2982 } data;
2983
2984 struct in6_addr secret;
2985 struct in6_addr temp;
2986 struct net *net = dev_net(idev->dev);
2987
2988 BUILD_BUG_ON(sizeof(data.__data) != sizeof(data));
2989
2990 if (idev->cnf.stable_secret.initialized)
2991 secret = idev->cnf.stable_secret.secret;
2992 else if (net->ipv6.devconf_dflt->stable_secret.initialized)
2993 secret = net->ipv6.devconf_dflt->stable_secret.secret;
2994 else
2995 return -1;
2996
2997retry:
2998 spin_lock_bh(&lock);
2999
3000 sha_init(digest);
3001 memset(&data, 0, sizeof(data));
3002 memset(workspace, 0, sizeof(workspace));
3003 memcpy(data.hwaddr, idev->dev->perm_addr, idev->dev->addr_len);
Hannes Frederic Sowaff402172015-03-24 11:05:28 +01003004 data.prefix[0] = address->s6_addr32[0];
3005 data.prefix[1] = address->s6_addr32[1];
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01003006 data.secret = secret;
3007 data.dad_count = dad_count;
3008
3009 sha_transform(digest, data.__data, workspace);
3010
3011 temp = *address;
Hannes Frederic Sowaff402172015-03-24 11:05:28 +01003012 temp.s6_addr32[2] = (__force __be32)digest[0];
3013 temp.s6_addr32[3] = (__force __be32)digest[1];
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01003014
3015 spin_unlock_bh(&lock);
3016
3017 if (ipv6_reserved_interfaceid(temp)) {
3018 dad_count++;
Hannes Frederic Sowa1855b7c2015-03-23 23:36:05 +01003019 if (dad_count > dev_net(idev->dev)->ipv6.sysctl.idgen_retries)
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01003020 return -1;
3021 goto retry;
3022 }
3023
3024 *address = temp;
3025 return 0;
3026}
3027
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02003028static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route)
3029{
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01003030 struct in6_addr addr;
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02003031
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01003032 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
3033
3034 if (idev->addr_gen_mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY) {
3035 if (!ipv6_generate_stable_address(&addr, 0, idev))
Hannes Frederic Sowa64236f32015-03-23 23:36:02 +01003036 addrconf_add_linklocal(idev, &addr,
3037 IFA_F_STABLE_PRIVACY);
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01003038 else if (prefix_route)
3039 addrconf_prefix_route(&addr, 64, idev->dev, 0, 0);
3040 } else if (idev->addr_gen_mode == IN6_ADDR_GEN_MODE_EUI64) {
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02003041 /* addrconf_add_linklocal also adds a prefix_route and we
3042 * only need to care about prefix routes if ipv6_generate_eui64
3043 * couldn't generate one.
3044 */
3045 if (ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) == 0)
Hannes Frederic Sowa64236f32015-03-23 23:36:02 +01003046 addrconf_add_linklocal(idev, &addr, 0);
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02003047 else if (prefix_route)
3048 addrconf_prefix_route(&addr, 64, idev->dev, 0, 0);
3049 }
3050}
3051
Linus Torvalds1da177e2005-04-16 15:20:36 -07003052static void addrconf_dev_config(struct net_device *dev)
3053{
Eldad Zack8e5e8f32012-04-01 07:49:08 +00003054 struct inet6_dev *idev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003055
3056 ASSERT_RTNL();
3057
Herbert Xu74235a22007-06-14 13:02:55 -07003058 if ((dev->type != ARPHRD_ETHER) &&
3059 (dev->type != ARPHRD_FDDI) &&
Herbert Xu74235a22007-06-14 13:02:55 -07003060 (dev->type != ARPHRD_ARCNET) &&
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +00003061 (dev->type != ARPHRD_INFINIBAND) &&
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00003062 (dev->type != ARPHRD_IEEE802154) &&
Nicolas Dichtele8377352013-08-20 12:16:06 +02003063 (dev->type != ARPHRD_IEEE1394) &&
Jukka Rissanene74bccb2013-12-11 17:05:36 +02003064 (dev->type != ARPHRD_TUNNEL6) &&
3065 (dev->type != ARPHRD_6LOWPAN)) {
Herbert Xu74235a22007-06-14 13:02:55 -07003066 /* Alas, we support only Ethernet autoconfiguration. */
3067 return;
3068 }
3069
Linus Torvalds1da177e2005-04-16 15:20:36 -07003070 idev = addrconf_add_dev(dev);
Brian Haley64e724f2010-07-20 10:34:30 +00003071 if (IS_ERR(idev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003072 return;
3073
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02003074 addrconf_addr_gen(idev, false);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003075}
3076
Amerigo Wang07a93622012-10-29 16:23:10 +00003077#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003078static void addrconf_sit_config(struct net_device *dev)
3079{
3080 struct inet6_dev *idev;
3081
3082 ASSERT_RTNL();
3083
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003084 /*
3085 * Configure the tunnel with one of our IPv4
3086 * addresses... we should configure all of
Linus Torvalds1da177e2005-04-16 15:20:36 -07003087 * our v4 addrs in the tunnel
3088 */
3089
Ian Morrise5d08d72014-11-23 21:28:43 +00003090 idev = ipv6_find_idev(dev);
Ian Morris63159f22015-03-29 14:00:04 +01003091 if (!idev) {
Joe Perches91df42b2012-05-15 14:11:54 +00003092 pr_debug("%s: add_dev failed\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003093 return;
3094 }
3095
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11003096 if (dev->priv_flags & IFF_ISATAP) {
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02003097 addrconf_addr_gen(idev, false);
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11003098 return;
3099 }
3100
Linus Torvalds1da177e2005-04-16 15:20:36 -07003101 sit_add_v4_addrs(idev);
3102
Nicolas Dichtel62b54dd2012-10-01 23:19:14 +00003103 if (dev->flags&IFF_POINTOPOINT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003104 addrconf_add_mroute(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003105}
Joerg Roedel0be669b2006-10-10 14:49:53 -07003106#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07003107
Amerigo Wang07a93622012-10-29 16:23:10 +00003108#if IS_ENABLED(CONFIG_NET_IPGRE)
stephen hemmingeraee80b52011-06-08 10:44:30 +00003109static void addrconf_gre_config(struct net_device *dev)
3110{
3111 struct inet6_dev *idev;
stephen hemmingeraee80b52011-06-08 10:44:30 +00003112
stephen hemmingeraee80b52011-06-08 10:44:30 +00003113 ASSERT_RTNL();
3114
Ian Morrise5d08d72014-11-23 21:28:43 +00003115 idev = ipv6_find_idev(dev);
Ian Morris63159f22015-03-29 14:00:04 +01003116 if (!idev) {
Joe Perches91df42b2012-05-15 14:11:54 +00003117 pr_debug("%s: add_dev failed\n", __func__);
stephen hemmingeraee80b52011-06-08 10:44:30 +00003118 return;
3119 }
3120
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02003121 addrconf_addr_gen(idev, true);
stephen hemmingeraee80b52011-06-08 10:44:30 +00003122}
3123#endif
3124
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003125static int addrconf_notify(struct notifier_block *this, unsigned long event,
Jiri Pirko351638e2013-05-28 01:30:21 +00003126 void *ptr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003127{
Jiri Pirko351638e2013-05-28 01:30:21 +00003128 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Eric Dumazet748e2d92012-08-22 21:50:59 +00003129 struct inet6_dev *idev = __in6_dev_get(dev);
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09003130 int run_pending = 0;
Herbert Xub217d612007-07-30 17:04:52 -07003131 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003132
Stephen Hemmingere21e8462010-03-20 16:09:01 -07003133 switch (event) {
YOSHIFUJI Hideaki45ba9dd2007-02-15 02:07:27 +09003134 case NETDEV_REGISTER:
Herbert Xu74235a22007-06-14 13:02:55 -07003135 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
YOSHIFUJI Hideaki45ba9dd2007-02-15 02:07:27 +09003136 idev = ipv6_add_dev(dev);
WANG Conga317a2f2014-07-25 15:25:09 -07003137 if (IS_ERR(idev))
3138 return notifier_from_errno(PTR_ERR(idev));
YOSHIFUJI Hideaki45ba9dd2007-02-15 02:07:27 +09003139 }
3140 break;
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003141
Linus Torvalds1da177e2005-04-16 15:20:36 -07003142 case NETDEV_UP:
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003143 case NETDEV_CHANGE:
Jay Vosburghc2edacf2007-07-09 10:42:47 -07003144 if (dev->flags & IFF_SLAVE)
3145 break;
3146
WANG Cong3ce62a82014-09-11 15:07:16 -07003147 if (idev && idev->cnf.disable_ipv6)
3148 break;
3149
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003150 if (event == NETDEV_UP) {
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -07003151 if (!addrconf_qdisc_ok(dev)) {
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003152 /* device is not ready yet. */
Joe Perchesf3213832012-05-15 14:11:53 +00003153 pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n",
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003154 dev->name);
3155 break;
3156 }
Kristian Slavov99081042006-02-08 16:10:53 -08003157
Evgeniy Polyakovd31c7b82007-11-30 23:36:08 +11003158 if (!idev && dev->mtu >= IPV6_MIN_MTU)
3159 idev = ipv6_add_dev(dev);
3160
WANG Conga317a2f2014-07-25 15:25:09 -07003161 if (!IS_ERR_OR_NULL(idev)) {
Kristian Slavov99081042006-02-08 16:10:53 -08003162 idev->if_flags |= IF_READY;
Benjamin Therye3ec6cf2008-11-05 01:43:57 -08003163 run_pending = 1;
3164 }
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003165 } else {
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -07003166 if (!addrconf_qdisc_ok(dev)) {
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003167 /* device is still not ready. */
3168 break;
3169 }
3170
3171 if (idev) {
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003172 if (idev->if_flags & IF_READY)
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003173 /* device is already configured. */
3174 break;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003175 idev->if_flags |= IF_READY;
3176 }
3177
Joe Perchesf3213832012-05-15 14:11:53 +00003178 pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n",
3179 dev->name);
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003180
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09003181 run_pending = 1;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003182 }
3183
Stephen Hemmingere21e8462010-03-20 16:09:01 -07003184 switch (dev->type) {
Amerigo Wang07a93622012-10-29 16:23:10 +00003185#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003186 case ARPHRD_SIT:
3187 addrconf_sit_config(dev);
3188 break;
Joerg Roedel0be669b2006-10-10 14:49:53 -07003189#endif
Amerigo Wang07a93622012-10-29 16:23:10 +00003190#if IS_ENABLED(CONFIG_NET_IPGRE)
stephen hemmingeraee80b52011-06-08 10:44:30 +00003191 case ARPHRD_IPGRE:
3192 addrconf_gre_config(dev);
3193 break;
3194#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07003195 case ARPHRD_LOOPBACK:
3196 init_loopback(dev);
3197 break;
3198
3199 default:
3200 addrconf_dev_config(dev);
3201 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07003202 }
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003203
WANG Conga317a2f2014-07-25 15:25:09 -07003204 if (!IS_ERR_OR_NULL(idev)) {
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09003205 if (run_pending)
3206 addrconf_dad_run(idev);
3207
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003208 /*
3209 * If the MTU changed during the interface down,
3210 * when the interface up, the changed MTU must be
3211 * reflected in the idev as well as routers.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003212 */
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003213 if (idev->cnf.mtu6 != dev->mtu &&
3214 dev->mtu >= IPV6_MIN_MTU) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003215 rt6_mtu_change(dev, dev->mtu);
3216 idev->cnf.mtu6 = dev->mtu;
3217 }
3218 idev->tstamp = jiffies;
3219 inet6_ifinfo_notify(RTM_NEWLINK, idev);
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003220
3221 /*
3222 * If the changed mtu during down is lower than
3223 * IPV6_MIN_MTU stop IPv6 on this interface.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003224 */
3225 if (dev->mtu < IPV6_MIN_MTU)
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003226 addrconf_ifdown(dev, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003227 }
3228 break;
3229
3230 case NETDEV_CHANGEMTU:
Evgeniy Polyakovd31c7b82007-11-30 23:36:08 +11003231 if (idev && dev->mtu >= IPV6_MIN_MTU) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003232 rt6_mtu_change(dev, dev->mtu);
3233 idev->cnf.mtu6 = dev->mtu;
3234 break;
3235 }
3236
Evgeniy Polyakovd31c7b82007-11-30 23:36:08 +11003237 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
3238 idev = ipv6_add_dev(dev);
WANG Conga317a2f2014-07-25 15:25:09 -07003239 if (!IS_ERR(idev))
Evgeniy Polyakovd31c7b82007-11-30 23:36:08 +11003240 break;
3241 }
3242
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003243 /*
stephen hemmingerdb9c7c32014-01-12 11:26:32 -08003244 * if MTU under IPV6_MIN_MTU.
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003245 * Stop IPv6 on this interface.
3246 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003247
3248 case NETDEV_DOWN:
3249 case NETDEV_UNREGISTER:
3250 /*
3251 * Remove all addresses from this interface.
3252 */
3253 addrconf_ifdown(dev, event != NETDEV_DOWN);
3254 break;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003255
Linus Torvalds1da177e2005-04-16 15:20:36 -07003256 case NETDEV_CHANGENAME:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003257 if (idev) {
Stephen Hemminger5632c512007-04-28 21:16:39 -07003258 snmp6_unregister_dev(idev);
Pavel Emelyanov408c4762008-01-10 17:41:21 -08003259 addrconf_sysctl_unregister(idev);
WANG Conga317a2f2014-07-25 15:25:09 -07003260 err = addrconf_sysctl_register(idev);
Herbert Xub217d612007-07-30 17:04:52 -07003261 if (err)
3262 return notifier_from_errno(err);
WANG Conga317a2f2014-07-25 15:25:09 -07003263 err = snmp6_register_dev(idev);
3264 if (err) {
3265 addrconf_sysctl_unregister(idev);
3266 return notifier_from_errno(err);
3267 }
Stephen Hemminger5632c512007-04-28 21:16:39 -07003268 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003269 break;
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003270
Jiri Pirko93d9b7d2010-03-10 10:28:56 +00003271 case NETDEV_PRE_TYPE_CHANGE:
3272 case NETDEV_POST_TYPE_CHANGE:
3273 addrconf_type_change(dev, event);
Moni Shoua75c78502009-09-15 02:37:40 -07003274 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07003275 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003276
3277 return NOTIFY_OK;
3278}
3279
3280/*
3281 * addrconf module should be notified of a device going up
3282 */
3283static struct notifier_block ipv6_dev_notf = {
3284 .notifier_call = addrconf_notify,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003285};
3286
Jiri Pirko93d9b7d2010-03-10 10:28:56 +00003287static void addrconf_type_change(struct net_device *dev, unsigned long event)
Moni Shoua75c78502009-09-15 02:37:40 -07003288{
3289 struct inet6_dev *idev;
3290 ASSERT_RTNL();
3291
3292 idev = __in6_dev_get(dev);
3293
Jiri Pirko93d9b7d2010-03-10 10:28:56 +00003294 if (event == NETDEV_POST_TYPE_CHANGE)
Moni Shoua75c78502009-09-15 02:37:40 -07003295 ipv6_mc_remap(idev);
Jiri Pirko93d9b7d2010-03-10 10:28:56 +00003296 else if (event == NETDEV_PRE_TYPE_CHANGE)
Moni Shoua75c78502009-09-15 02:37:40 -07003297 ipv6_mc_unmap(idev);
3298}
3299
Linus Torvalds1da177e2005-04-16 15:20:36 -07003300static int addrconf_ifdown(struct net_device *dev, int how)
3301{
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09003302 struct net *net = dev_net(dev);
stephen hemminger502a2ff2010-03-17 20:31:13 +00003303 struct inet6_dev *idev;
3304 struct inet6_ifaddr *ifa;
David S. Miller73a8bd72011-01-23 23:27:15 -08003305 int state, i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003306
3307 ASSERT_RTNL();
3308
David S. Miller73a8bd72011-01-23 23:27:15 -08003309 rt6_ifdown(net, dev);
3310 neigh_ifdown(&nd_tbl, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003311
3312 idev = __in6_dev_get(dev);
Ian Morris63159f22015-03-29 14:00:04 +01003313 if (!idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003314 return -ENODEV;
3315
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003316 /*
3317 * Step 1: remove reference to ipv6 device from parent device.
3318 * Do not dev_put!
Linus Torvalds1da177e2005-04-16 15:20:36 -07003319 */
Denis V. Lunev439e2382008-04-03 13:30:17 -07003320 if (how) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003321 idev->dead = 1;
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07003322
3323 /* protected by rtnl_lock */
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +00003324 RCU_INIT_POINTER(dev->ip6_ptr, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003325
3326 /* Step 1.5: remove snmp6 entry */
3327 snmp6_unregister_dev(idev);
3328
3329 }
3330
David S. Miller73a8bd72011-01-23 23:27:15 -08003331 /* Step 2: clear hash table */
3332 for (i = 0; i < IN6_ADDR_HSIZE; i++) {
3333 struct hlist_head *h = &inet6_addr_lst[i];
David S. Miller73a8bd72011-01-23 23:27:15 -08003334
3335 spin_lock_bh(&addrconf_hash_lock);
Ian Morris67ba4152014-08-24 21:53:10 +01003336restart:
Sasha Levinb67bfe02013-02-27 17:06:00 -08003337 hlist_for_each_entry_rcu(ifa, h, addr_lst) {
David S. Miller73a8bd72011-01-23 23:27:15 -08003338 if (ifa->idev == idev) {
3339 hlist_del_init_rcu(&ifa->addr_lst);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003340 addrconf_del_dad_work(ifa);
David S. Miller73a8bd72011-01-23 23:27:15 -08003341 goto restart;
3342 }
3343 }
3344 spin_unlock_bh(&addrconf_hash_lock);
3345 }
3346
Linus Torvalds1da177e2005-04-16 15:20:36 -07003347 write_lock_bh(&idev->lock);
3348
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003349 addrconf_del_rs_timer(idev);
3350
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003351 /* Step 2: clear flags for stateless addrconf */
Denis V. Lunev439e2382008-04-03 13:30:17 -07003352 if (!how)
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003353 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003354
Denis V. Lunev439e2382008-04-03 13:30:17 -07003355 if (how && del_timer(&idev->regen_timer))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003356 in6_dev_put(idev);
3357
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003358 /* Step 3: clear tempaddr list */
stephen hemminger372e6c82010-03-17 20:31:09 +00003359 while (!list_empty(&idev->tempaddr_list)) {
3360 ifa = list_first_entry(&idev->tempaddr_list,
3361 struct inet6_ifaddr, tmp_list);
3362 list_del(&ifa->tmp_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003363 write_unlock_bh(&idev->lock);
3364 spin_lock_bh(&ifa->lock);
3365
3366 if (ifa->ifpub) {
3367 in6_ifa_put(ifa->ifpub);
3368 ifa->ifpub = NULL;
3369 }
3370 spin_unlock_bh(&ifa->lock);
3371 in6_ifa_put(ifa);
3372 write_lock_bh(&idev->lock);
3373 }
stephen hemminger8f37ada2010-03-03 08:19:59 +00003374
stephen hemminger502a2ff2010-03-17 20:31:13 +00003375 while (!list_empty(&idev->addr_list)) {
3376 ifa = list_first_entry(&idev->addr_list,
3377 struct inet6_ifaddr, if_list);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003378 addrconf_del_dad_work(ifa);
stephen hemminger84e8b802010-03-02 13:32:46 +00003379
David S. Miller73a8bd72011-01-23 23:27:15 -08003380 list_del(&ifa->if_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003381
David S. Miller73a8bd72011-01-23 23:27:15 -08003382 write_unlock_bh(&idev->lock);
stephen hemminger84e8b802010-03-02 13:32:46 +00003383
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01003384 spin_lock_bh(&ifa->lock);
David S. Miller73a8bd72011-01-23 23:27:15 -08003385 state = ifa->state;
3386 ifa->state = INET6_IFADDR_STATE_DEAD;
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01003387 spin_unlock_bh(&ifa->lock);
stephen hemminger84e8b802010-03-02 13:32:46 +00003388
David S. Miller73a8bd72011-01-23 23:27:15 -08003389 if (state != INET6_IFADDR_STATE_DEAD) {
3390 __ipv6_ifa_notify(RTM_DELADDR, ifa);
Cong Wangf88c91d2013-04-14 23:18:43 +08003391 inet6addr_notifier_call_chain(NETDEV_DOWN, ifa);
stephen hemminger27bdb2a2010-04-12 05:41:32 +00003392 }
David S. Miller73a8bd72011-01-23 23:27:15 -08003393 in6_ifa_put(ifa);
stephen hemminger8f37ada2010-03-03 08:19:59 +00003394
David S. Miller73a8bd72011-01-23 23:27:15 -08003395 write_lock_bh(&idev->lock);
3396 }
stephen hemminger8f37ada2010-03-03 08:19:59 +00003397
Linus Torvalds1da177e2005-04-16 15:20:36 -07003398 write_unlock_bh(&idev->lock);
3399
Sabrina Dubroca381f4dc2014-09-10 23:23:02 +02003400 /* Step 5: Discard anycast and multicast list */
3401 if (how) {
3402 ipv6_ac_destroy_dev(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003403 ipv6_mc_destroy_dev(idev);
Sabrina Dubroca381f4dc2014-09-10 23:23:02 +02003404 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003405 ipv6_mc_down(idev);
Sabrina Dubroca381f4dc2014-09-10 23:23:02 +02003406 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003407
Linus Torvalds1da177e2005-04-16 15:20:36 -07003408 idev->tstamp = jiffies;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003409
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003410 /* Last: Shot the device (if unregistered) */
Denis V. Lunev439e2382008-04-03 13:30:17 -07003411 if (how) {
Pavel Emelyanov408c4762008-01-10 17:41:21 -08003412 addrconf_sysctl_unregister(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003413 neigh_parms_release(&nd_tbl, idev->nd_parms);
3414 neigh_ifdown(&nd_tbl, dev);
3415 in6_dev_put(idev);
3416 }
3417 return 0;
3418}
3419
3420static void addrconf_rs_timer(unsigned long data)
3421{
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003422 struct inet6_dev *idev = (struct inet6_dev *)data;
Cong Wangcaf92bc2013-08-31 13:44:32 +08003423 struct net_device *dev = idev->dev;
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003424 struct in6_addr lladdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003425
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003426 write_lock(&idev->lock);
stephen hemminger5b2a1952010-03-02 13:32:45 +00003427 if (idev->dead || !(idev->if_flags & IF_READY))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003428 goto out;
3429
Shmulik Ladkani9ba2add2012-12-02 01:44:53 +00003430 if (!ipv6_accept_ra(idev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003431 goto out;
stephen hemminger5b2a1952010-03-02 13:32:45 +00003432
3433 /* Announcement received after solicitation was sent */
3434 if (idev->if_flags & IF_RA_RCVD)
3435 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003436
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003437 if (idev->rs_probes++ < idev->cnf.rtr_solicits) {
Cong Wangcaf92bc2013-08-31 13:44:32 +08003438 write_unlock(&idev->lock);
3439 if (!ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE))
3440 ndisc_send_rs(dev, &lladdr,
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003441 &in6addr_linklocal_allrouters);
3442 else
Cong Wangcaf92bc2013-08-31 13:44:32 +08003443 goto put;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003444
Cong Wangcaf92bc2013-08-31 13:44:32 +08003445 write_lock(&idev->lock);
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003446 /* The wait after the last probe can be shorter */
3447 addrconf_mod_rs_timer(idev, (idev->rs_probes ==
3448 idev->cnf.rtr_solicits) ?
3449 idev->cnf.rtr_solicit_delay :
3450 idev->cnf.rtr_solicit_interval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003451 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003452 /*
3453 * Note: we do not support deprecated "all on-link"
3454 * assumption any longer.
3455 */
Joe Perches91df42b2012-05-15 14:11:54 +00003456 pr_debug("%s: no IPv6 routers present\n", idev->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003457 }
3458
3459out:
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003460 write_unlock(&idev->lock);
Cong Wangcaf92bc2013-08-31 13:44:32 +08003461put:
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003462 in6_dev_put(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003463}
3464
3465/*
3466 * Duplicate Address Detection
3467 */
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003468static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
3469{
3470 unsigned long rand_num;
3471 struct inet6_dev *idev = ifp->idev;
3472
Neil Horman95c385b2007-04-25 17:08:10 -07003473 if (ifp->flags & IFA_F_OPTIMISTIC)
3474 rand_num = 0;
3475 else
Aruna-Hewapathirane63862b52014-01-11 07:15:59 -05003476 rand_num = prandom_u32() % (idev->cnf.rtr_solicit_delay ? : 1);
Neil Horman95c385b2007-04-25 17:08:10 -07003477
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003478 ifp->dad_probes = idev->cnf.dad_transmits;
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003479 addrconf_mod_dad_work(ifp, rand_num);
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003480}
3481
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003482static void addrconf_dad_begin(struct inet6_ifaddr *ifp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003483{
3484 struct inet6_dev *idev = ifp->idev;
3485 struct net_device *dev = idev->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003486
3487 addrconf_join_solict(dev, &ifp->addr);
3488
Aruna-Hewapathirane63862b52014-01-11 07:15:59 -05003489 prandom_seed((__force u32) ifp->addr.s6_addr32[3]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003490
3491 read_lock_bh(&idev->lock);
Herbert Xu622ccdf2010-05-18 15:56:06 -07003492 spin_lock(&ifp->lock);
Herbert Xue9d3e082010-05-18 15:36:06 -07003493 if (ifp->state == INET6_IFADDR_STATE_DEAD)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003494 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003495
3496 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09003497 idev->cnf.accept_dad < 1 ||
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003498 !(ifp->flags&IFA_F_TENTATIVE) ||
3499 ifp->flags & IFA_F_NODAD) {
Brian Haleycc411d02009-09-09 14:41:32 +00003500 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED);
stephen hemminger21809fa2010-02-08 19:48:52 +00003501 spin_unlock(&ifp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003502 read_unlock_bh(&idev->lock);
3503
3504 addrconf_dad_completed(ifp);
3505 return;
3506 }
3507
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08003508 if (!(idev->if_flags & IF_READY)) {
stephen hemminger21809fa2010-02-08 19:48:52 +00003509 spin_unlock(&ifp->lock);
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08003510 read_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003511 /*
Masatake YAMATO590a9882009-06-09 10:41:12 +09003512 * If the device is not ready:
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003513 * - keep it tentative if it is a permanent address.
3514 * - otherwise, kill it.
3515 */
3516 in6_ifa_hold(ifp);
Brian Haleycc411d02009-09-09 14:41:32 +00003517 addrconf_dad_stop(ifp, 0);
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08003518 return;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003519 }
Neil Horman95c385b2007-04-25 17:08:10 -07003520
3521 /*
3522 * Optimistic nodes can start receiving
3523 * Frames right away
3524 */
Erik Kline7fd25612014-10-28 18:11:14 +09003525 if (ifp->flags & IFA_F_OPTIMISTIC) {
Neil Horman95c385b2007-04-25 17:08:10 -07003526 ip6_ins_rt(ifp->rt);
Erik Kline7fd25612014-10-28 18:11:14 +09003527 if (ipv6_use_optimistic_addr(idev)) {
3528 /* Because optimistic nodes can use this address,
3529 * notify listeners. If DAD fails, RTM_DELADDR is sent.
3530 */
3531 ipv6_ifa_notify(RTM_NEWADDR, ifp);
3532 }
3533 }
Neil Horman95c385b2007-04-25 17:08:10 -07003534
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08003535 addrconf_dad_kick(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003536out:
Herbert Xu622ccdf2010-05-18 15:56:06 -07003537 spin_unlock(&ifp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003538 read_unlock_bh(&idev->lock);
3539}
3540
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003541static void addrconf_dad_start(struct inet6_ifaddr *ifp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003542{
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003543 bool begin_dad = false;
3544
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01003545 spin_lock_bh(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003546 if (ifp->state != INET6_IFADDR_STATE_DEAD) {
3547 ifp->state = INET6_IFADDR_STATE_PREDAD;
3548 begin_dad = true;
3549 }
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01003550 spin_unlock_bh(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003551
3552 if (begin_dad)
3553 addrconf_mod_dad_work(ifp, 0);
3554}
3555
3556static void addrconf_dad_work(struct work_struct *w)
3557{
3558 struct inet6_ifaddr *ifp = container_of(to_delayed_work(w),
3559 struct inet6_ifaddr,
3560 dad_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003561 struct inet6_dev *idev = ifp->idev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003562 struct in6_addr mcaddr;
3563
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003564 enum {
3565 DAD_PROCESS,
3566 DAD_BEGIN,
3567 DAD_ABORT,
3568 } action = DAD_PROCESS;
3569
3570 rtnl_lock();
3571
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01003572 spin_lock_bh(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003573 if (ifp->state == INET6_IFADDR_STATE_PREDAD) {
3574 action = DAD_BEGIN;
3575 ifp->state = INET6_IFADDR_STATE_DAD;
3576 } else if (ifp->state == INET6_IFADDR_STATE_ERRDAD) {
3577 action = DAD_ABORT;
3578 ifp->state = INET6_IFADDR_STATE_POSTDAD;
3579 }
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01003580 spin_unlock_bh(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003581
3582 if (action == DAD_BEGIN) {
3583 addrconf_dad_begin(ifp);
3584 goto out;
3585 } else if (action == DAD_ABORT) {
3586 addrconf_dad_stop(ifp, 1);
3587 goto out;
3588 }
3589
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003590 if (!ifp->dad_probes && addrconf_dad_end(ifp))
Herbert Xuf2344a12010-05-18 15:55:27 -07003591 goto out;
3592
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003593 write_lock_bh(&idev->lock);
stephen hemminger122e4512010-03-02 13:32:44 +00003594 if (idev->dead || !(idev->if_flags & IF_READY)) {
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003595 write_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003596 goto out;
3597 }
stephen hemminger21809fa2010-02-08 19:48:52 +00003598
3599 spin_lock(&ifp->lock);
Herbert Xu622ccdf2010-05-18 15:56:06 -07003600 if (ifp->state == INET6_IFADDR_STATE_DEAD) {
3601 spin_unlock(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003602 write_unlock_bh(&idev->lock);
Herbert Xu622ccdf2010-05-18 15:56:06 -07003603 goto out;
3604 }
3605
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003606 if (ifp->dad_probes == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003607 /*
3608 * DAD was successful
3609 */
3610
Brian Haleycc411d02009-09-09 14:41:32 +00003611 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED);
stephen hemminger21809fa2010-02-08 19:48:52 +00003612 spin_unlock(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003613 write_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003614
3615 addrconf_dad_completed(ifp);
3616
3617 goto out;
3618 }
3619
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003620 ifp->dad_probes--;
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003621 addrconf_mod_dad_work(ifp,
3622 NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME));
stephen hemminger21809fa2010-02-08 19:48:52 +00003623 spin_unlock(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003624 write_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003625
3626 /* send a neighbour solicitation for our addr */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003627 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
Jiri Bencab450602015-08-20 13:56:27 +02003628 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003629out:
3630 in6_ifa_put(ifp);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003631 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003632}
3633
Hannes Frederic Sowa11ffff72014-01-16 20:13:04 +01003634/* ifp->idev must be at least read locked */
3635static bool ipv6_lonely_lladdr(struct inet6_ifaddr *ifp)
3636{
3637 struct inet6_ifaddr *ifpiter;
3638 struct inet6_dev *idev = ifp->idev;
3639
Hannes Frederic Sowa602582c2014-01-19 21:58:19 +01003640 list_for_each_entry_reverse(ifpiter, &idev->addr_list, if_list) {
3641 if (ifpiter->scope > IFA_LINK)
3642 break;
Hannes Frederic Sowa11ffff72014-01-16 20:13:04 +01003643 if (ifp != ifpiter && ifpiter->scope == IFA_LINK &&
3644 (ifpiter->flags & (IFA_F_PERMANENT|IFA_F_TENTATIVE|
3645 IFA_F_OPTIMISTIC|IFA_F_DADFAILED)) ==
3646 IFA_F_PERMANENT)
3647 return false;
3648 }
3649 return true;
3650}
3651
Linus Torvalds1da177e2005-04-16 15:20:36 -07003652static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
3653{
Stephen Hemmingere21e8462010-03-20 16:09:01 -07003654 struct net_device *dev = ifp->idev->dev;
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003655 struct in6_addr lladdr;
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02003656 bool send_rs, send_mld;
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003657
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003658 addrconf_del_dad_work(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003659
3660 /*
3661 * Configure the address for reception. Now it is valid.
3662 */
3663
3664 ipv6_ifa_notify(RTM_NEWADDR, ifp);
3665
Tore Anderson026359b2011-08-28 23:47:33 +00003666 /* If added prefix is link local and we are prepared to process
3667 router advertisements, start sending router solicitations.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003668 */
3669
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02003670 read_lock_bh(&ifp->idev->lock);
Hannes Frederic Sowa11ffff72014-01-16 20:13:04 +01003671 send_mld = ifp->scope == IFA_LINK && ipv6_lonely_lladdr(ifp);
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02003672 send_rs = send_mld &&
3673 ipv6_accept_ra(ifp->idev) &&
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02003674 ifp->idev->cnf.rtr_solicits > 0 &&
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02003675 (dev->flags&IFF_LOOPBACK) == 0;
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02003676 read_unlock_bh(&ifp->idev->lock);
3677
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02003678 /* While dad is in progress mld report's source address is in6_addrany.
3679 * Resend with proper ll now.
3680 */
3681 if (send_mld)
3682 ipv6_mc_dad_complete(ifp->idev);
3683
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02003684 if (send_rs) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003685 /*
3686 * If a host as already performed a random delay
3687 * [...] as part of DAD [...] there is no need
3688 * to delay again before sending the first RS
3689 */
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02003690 if (ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE))
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003691 return;
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02003692 ndisc_send_rs(dev, &lladdr, &in6addr_linklocal_allrouters);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003693
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003694 write_lock_bh(&ifp->idev->lock);
3695 spin_lock(&ifp->lock);
3696 ifp->idev->rs_probes = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003697 ifp->idev->if_flags |= IF_RS_SENT;
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003698 addrconf_mod_rs_timer(ifp->idev,
3699 ifp->idev->cnf.rtr_solicit_interval);
3700 spin_unlock(&ifp->lock);
3701 write_unlock_bh(&ifp->idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003702 }
3703}
3704
Stephen Hemmingere21e8462010-03-20 16:09:01 -07003705static void addrconf_dad_run(struct inet6_dev *idev)
3706{
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09003707 struct inet6_ifaddr *ifp;
3708
3709 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00003710 list_for_each_entry(ifp, &idev->addr_list, if_list) {
stephen hemminger21809fa2010-02-08 19:48:52 +00003711 spin_lock(&ifp->lock);
Herbert Xuf2344a12010-05-18 15:55:27 -07003712 if (ifp->flags & IFA_F_TENTATIVE &&
3713 ifp->state == INET6_IFADDR_STATE_DAD)
3714 addrconf_dad_kick(ifp);
stephen hemminger21809fa2010-02-08 19:48:52 +00003715 spin_unlock(&ifp->lock);
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09003716 }
3717 read_unlock_bh(&idev->lock);
3718}
3719
Linus Torvalds1da177e2005-04-16 15:20:36 -07003720#ifdef CONFIG_PROC_FS
3721struct if6_iter_state {
Daniel Lezcano3c400902008-01-10 22:42:49 -08003722 struct seq_net_private p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003723 int bucket;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003724 int offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003725};
3726
Mihai Maruseac1d578302012-01-03 23:31:35 +00003727static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003728{
3729 struct inet6_ifaddr *ifa = NULL;
3730 struct if6_iter_state *state = seq->private;
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +09003731 struct net *net = seq_file_net(seq);
Mihai Maruseac1d578302012-01-03 23:31:35 +00003732 int p = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003733
Mihai Maruseac1d578302012-01-03 23:31:35 +00003734 /* initial bucket if pos is 0 */
3735 if (pos == 0) {
3736 state->bucket = 0;
3737 state->offset = 0;
3738 }
3739
3740 for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
Sasha Levinb67bfe02013-02-27 17:06:00 -08003741 hlist_for_each_entry_rcu_bh(ifa, &inet6_addr_lst[state->bucket],
Mihai Maruseac1d578302012-01-03 23:31:35 +00003742 addr_lst) {
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003743 if (!net_eq(dev_net(ifa->idev->dev), net))
3744 continue;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003745 /* sync with offset */
3746 if (p < state->offset) {
3747 p++;
3748 continue;
3749 }
3750 state->offset++;
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003751 return ifa;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003752 }
3753
3754 /* prepare for next bucket */
3755 state->offset = 0;
3756 p = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003757 }
stephen hemmingerc2e21292010-03-17 20:31:10 +00003758 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003759}
3760
stephen hemmingerc2e21292010-03-17 20:31:10 +00003761static struct inet6_ifaddr *if6_get_next(struct seq_file *seq,
3762 struct inet6_ifaddr *ifa)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003763{
3764 struct if6_iter_state *state = seq->private;
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +09003765 struct net *net = seq_file_net(seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003766
Sasha Levinb67bfe02013-02-27 17:06:00 -08003767 hlist_for_each_entry_continue_rcu_bh(ifa, addr_lst) {
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003768 if (!net_eq(dev_net(ifa->idev->dev), net))
3769 continue;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003770 state->offset++;
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003771 return ifa;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003772 }
stephen hemmingerc2e21292010-03-17 20:31:10 +00003773
3774 while (++state->bucket < IN6_ADDR_HSIZE) {
Mihai Maruseac1d578302012-01-03 23:31:35 +00003775 state->offset = 0;
Sasha Levinb67bfe02013-02-27 17:06:00 -08003776 hlist_for_each_entry_rcu_bh(ifa,
stephen hemmingerc2e21292010-03-17 20:31:10 +00003777 &inet6_addr_lst[state->bucket], addr_lst) {
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003778 if (!net_eq(dev_net(ifa->idev->dev), net))
3779 continue;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003780 state->offset++;
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003781 return ifa;
Daniel Lezcano3c400902008-01-10 22:42:49 -08003782 }
3783 }
3784
stephen hemmingerc2e21292010-03-17 20:31:10 +00003785 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003786}
3787
Linus Torvalds1da177e2005-04-16 15:20:36 -07003788static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
Eric Dumazet4f70ecc2010-05-03 10:50:14 +00003789 __acquires(rcu_bh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003790{
stephen hemminger5c578aed2010-03-17 20:31:11 +00003791 rcu_read_lock_bh();
Mihai Maruseac1d578302012-01-03 23:31:35 +00003792 return if6_get_first(seq, *pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003793}
3794
3795static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
3796{
3797 struct inet6_ifaddr *ifa;
3798
3799 ifa = if6_get_next(seq, v);
3800 ++*pos;
3801 return ifa;
3802}
3803
3804static void if6_seq_stop(struct seq_file *seq, void *v)
Eric Dumazet4f70ecc2010-05-03 10:50:14 +00003805 __releases(rcu_bh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003806{
stephen hemminger5c578aed2010-03-17 20:31:11 +00003807 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003808}
3809
3810static int if6_seq_show(struct seq_file *seq, void *v)
3811{
3812 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
Jiri Pirko971a3512013-12-10 13:56:29 +01003813 seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n",
Harvey Harrisonb0711952008-10-28 16:05:40 -07003814 &ifp->addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003815 ifp->idev->dev->ifindex,
3816 ifp->prefix_len,
3817 ifp->scope,
Jiri Pirko971a3512013-12-10 13:56:29 +01003818 (u8) ifp->flags,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003819 ifp->idev->dev->name);
3820 return 0;
3821}
3822
Philippe De Muyter56b3d972007-07-10 23:07:31 -07003823static const struct seq_operations if6_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003824 .start = if6_seq_start,
3825 .next = if6_seq_next,
3826 .show = if6_seq_show,
3827 .stop = if6_seq_stop,
3828};
3829
3830static int if6_seq_open(struct inode *inode, struct file *file)
3831{
Daniel Lezcano3c400902008-01-10 22:42:49 -08003832 return seq_open_net(inode, file, &if6_seq_ops,
3833 sizeof(struct if6_iter_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003834}
3835
Arjan van de Ven9a321442007-02-12 00:55:35 -08003836static const struct file_operations if6_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003837 .owner = THIS_MODULE,
3838 .open = if6_seq_open,
3839 .read = seq_read,
3840 .llseek = seq_lseek,
Daniel Lezcano3c400902008-01-10 22:42:49 -08003841 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003842};
3843
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00003844static int __net_init if6_proc_net_init(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003845{
Gao fengd4beaa62013-02-18 01:34:54 +00003846 if (!proc_create("if_inet6", S_IRUGO, net->proc_net, &if6_fops))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003847 return -ENOMEM;
3848 return 0;
3849}
3850
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00003851static void __net_exit if6_proc_net_exit(struct net *net)
Daniel Lezcano3c400902008-01-10 22:42:49 -08003852{
Gao fengece31ff2013-02-18 01:34:56 +00003853 remove_proc_entry("if_inet6", net->proc_net);
Daniel Lezcano3c400902008-01-10 22:42:49 -08003854}
3855
3856static struct pernet_operations if6_proc_net_ops = {
Ian Morris67ba4152014-08-24 21:53:10 +01003857 .init = if6_proc_net_init,
3858 .exit = if6_proc_net_exit,
Daniel Lezcano3c400902008-01-10 22:42:49 -08003859};
3860
3861int __init if6_proc_init(void)
3862{
3863 return register_pernet_subsys(&if6_proc_net_ops);
3864}
3865
Linus Torvalds1da177e2005-04-16 15:20:36 -07003866void if6_proc_exit(void)
3867{
Daniel Lezcano3c400902008-01-10 22:42:49 -08003868 unregister_pernet_subsys(&if6_proc_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003869}
3870#endif /* CONFIG_PROC_FS */
3871
Amerigo Wang07a93622012-10-29 16:23:10 +00003872#if IS_ENABLED(CONFIG_IPV6_MIP6)
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003873/* Check if address is a home address configured on any interface. */
Eric Dumazetb71d1d42011-04-22 04:53:02 +00003874int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr)
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003875{
3876 int ret = 0;
stephen hemmingerc2e21292010-03-17 20:31:10 +00003877 struct inet6_ifaddr *ifp = NULL;
Eric Dumazetddbe5032012-07-18 08:11:12 +00003878 unsigned int hash = inet6_addr_hash(addr);
stephen hemmingerc2e21292010-03-17 20:31:10 +00003879
stephen hemminger5c578aed2010-03-17 20:31:11 +00003880 rcu_read_lock_bh();
Sasha Levinb67bfe02013-02-27 17:06:00 -08003881 hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09003882 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcano389f6612008-01-10 22:44:40 -08003883 continue;
YOSHIFUJI Hideakicaad2952008-04-10 15:42:07 +09003884 if (ipv6_addr_equal(&ifp->addr, addr) &&
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003885 (ifp->flags & IFA_F_HOMEADDRESS)) {
3886 ret = 1;
3887 break;
3888 }
3889 }
stephen hemminger5c578aed2010-03-17 20:31:11 +00003890 rcu_read_unlock_bh();
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07003891 return ret;
3892}
3893#endif
3894
Linus Torvalds1da177e2005-04-16 15:20:36 -07003895/*
3896 * Periodic address status verification
3897 */
3898
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003899static void addrconf_verify_rtnl(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003900{
YOSHIFUJI Hideakib2db7562010-03-20 16:11:12 -07003901 unsigned long now, next, next_sec, next_sched;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003902 struct inet6_ifaddr *ifp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003903 int i;
3904
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003905 ASSERT_RTNL();
3906
stephen hemminger5c578aed2010-03-17 20:31:11 +00003907 rcu_read_lock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003908 now = jiffies;
YOSHIFUJI Hideakib2db7562010-03-20 16:11:12 -07003909 next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003910
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003911 cancel_delayed_work(&addr_chk_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003912
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003913 for (i = 0; i < IN6_ADDR_HSIZE; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003914restart:
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003915 hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[i], addr_lst) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003916 unsigned long age;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003917
Yasushi Asanofad8da32013-12-31 12:04:19 +09003918 /* When setting preferred_lft to a value not zero or
3919 * infinity, while valid_lft is infinity
3920 * IFA_F_PERMANENT has a non-infinity life time.
3921 */
3922 if ((ifp->flags & IFA_F_PERMANENT) &&
3923 (ifp->prefered_lft == INFINITY_LIFE_TIME))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003924 continue;
3925
3926 spin_lock(&ifp->lock);
YOSHIFUJI Hideakib2db7562010-03-20 16:11:12 -07003927 /* We try to batch several events at once. */
3928 age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003929
YOSHIFUJI Hideaki8f27ebb2006-07-28 18:12:11 +09003930 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
3931 age >= ifp->valid_lft) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003932 spin_unlock(&ifp->lock);
3933 in6_ifa_hold(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003934 ipv6_del_addr(ifp);
3935 goto restart;
YOSHIFUJI Hideaki8f27ebb2006-07-28 18:12:11 +09003936 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
3937 spin_unlock(&ifp->lock);
3938 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003939 } else if (age >= ifp->prefered_lft) {
Brian Haleya1ed0522009-07-02 07:10:52 +00003940 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003941 int deprecate = 0;
3942
3943 if (!(ifp->flags&IFA_F_DEPRECATED)) {
3944 deprecate = 1;
3945 ifp->flags |= IFA_F_DEPRECATED;
3946 }
3947
Yasushi Asanofad8da32013-12-31 12:04:19 +09003948 if ((ifp->valid_lft != INFINITY_LIFE_TIME) &&
3949 (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003950 next = ifp->tstamp + ifp->valid_lft * HZ;
3951
3952 spin_unlock(&ifp->lock);
3953
3954 if (deprecate) {
3955 in6_ifa_hold(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003956
3957 ipv6_ifa_notify(0, ifp);
3958 in6_ifa_put(ifp);
3959 goto restart;
3960 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003961 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
3962 !(ifp->flags&IFA_F_TENTATIVE)) {
stephen hemminger88949cf2010-03-17 20:31:17 +00003963 unsigned long regen_advance = ifp->idev->cnf.regen_max_retry *
3964 ifp->idev->cnf.dad_transmits *
Jiri Pirko1f9248e2013-12-07 19:26:53 +01003965 NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME) / HZ;
stephen hemminger88949cf2010-03-17 20:31:17 +00003966
Linus Torvalds1da177e2005-04-16 15:20:36 -07003967 if (age >= ifp->prefered_lft - regen_advance) {
3968 struct inet6_ifaddr *ifpub = ifp->ifpub;
3969 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3970 next = ifp->tstamp + ifp->prefered_lft * HZ;
3971 if (!ifp->regen_count && ifpub) {
3972 ifp->regen_count++;
3973 in6_ifa_hold(ifp);
3974 in6_ifa_hold(ifpub);
3975 spin_unlock(&ifp->lock);
stephen hemminger5c578aed2010-03-17 20:31:11 +00003976
Hiroyuki YAMAMORI291d8092005-12-23 11:24:05 -08003977 spin_lock(&ifpub->lock);
3978 ifpub->regen_count = 0;
3979 spin_unlock(&ifpub->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003980 ipv6_create_tempaddr(ifpub, ifp);
3981 in6_ifa_put(ifpub);
3982 in6_ifa_put(ifp);
3983 goto restart;
3984 }
3985 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
3986 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
3987 spin_unlock(&ifp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003988 } else {
3989 /* ifp->prefered_lft <= ifp->valid_lft */
3990 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3991 next = ifp->tstamp + ifp->prefered_lft * HZ;
3992 spin_unlock(&ifp->lock);
3993 }
3994 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003995 }
3996
YOSHIFUJI Hideakib2db7562010-03-20 16:11:12 -07003997 next_sec = round_jiffies_up(next);
3998 next_sched = next;
3999
4000 /* If rounded timeout is accurate enough, accept it. */
4001 if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ))
4002 next_sched = next_sec;
4003
4004 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
4005 if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX))
4006 next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX;
4007
dingtianhongba3542e2013-08-17 10:27:04 +08004008 ADBG(KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
4009 now, next, next_sec, next_sched);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01004010 mod_delayed_work(addrconf_wq, &addr_chk_work, next_sched - now);
stephen hemminger5c578aed2010-03-17 20:31:11 +00004011 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004012}
4013
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01004014static void addrconf_verify_work(struct work_struct *w)
4015{
4016 rtnl_lock();
4017 addrconf_verify_rtnl();
4018 rtnl_unlock();
4019}
4020
4021static void addrconf_verify(void)
4022{
4023 mod_delayed_work(addrconf_wq, &addr_chk_work, 0);
4024}
4025
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004026static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local,
4027 struct in6_addr **peer_pfx)
Thomas Graf461d8832006-09-18 00:09:49 -07004028{
4029 struct in6_addr *pfx = NULL;
4030
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004031 *peer_pfx = NULL;
4032
Thomas Graf461d8832006-09-18 00:09:49 -07004033 if (addr)
4034 pfx = nla_data(addr);
4035
4036 if (local) {
4037 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004038 *peer_pfx = pfx;
4039 pfx = nla_data(local);
Thomas Graf461d8832006-09-18 00:09:49 -07004040 }
4041
4042 return pfx;
4043}
4044
Patrick McHardyef7c79e2007-06-05 12:38:30 -07004045static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
Thomas Graf461d8832006-09-18 00:09:49 -07004046 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
4047 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
4048 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
Jiri Pirko479840f2013-12-06 09:45:21 +01004049 [IFA_FLAGS] = { .len = sizeof(u32) },
Thomas Graf461d8832006-09-18 00:09:49 -07004050};
4051
Linus Torvalds1da177e2005-04-16 15:20:36 -07004052static int
Thomas Graf661d2962013-03-21 07:45:29 +00004053inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004054{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09004055 struct net *net = sock_net(skb->sk);
Thomas Grafb933f712006-09-18 00:10:19 -07004056 struct ifaddrmsg *ifm;
4057 struct nlattr *tb[IFA_MAX+1];
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004058 struct in6_addr *pfx, *peer_pfx;
Heiner Kallweit6046d5b2014-04-20 21:29:36 +02004059 u32 ifa_flags;
Thomas Grafb933f712006-09-18 00:10:19 -07004060 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004061
Thomas Grafb933f712006-09-18 00:10:19 -07004062 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
4063 if (err < 0)
4064 return err;
4065
4066 ifm = nlmsg_data(nlh);
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004067 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx);
Ian Morris63159f22015-03-29 14:00:04 +01004068 if (!pfx)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004069 return -EINVAL;
4070
Heiner Kallweit6046d5b2014-04-20 21:29:36 +02004071 ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags;
4072
4073 /* We ignore other flags so far. */
4074 ifa_flags &= IFA_F_MANAGETEMPADDR;
4075
4076 return inet6_addr_del(net, ifm->ifa_index, ifa_flags, pfx,
4077 ifm->ifa_prefixlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004078}
4079
Jiri Pirko479840f2013-12-06 09:45:21 +01004080static int inet6_addr_modify(struct inet6_ifaddr *ifp, u32 ifa_flags,
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07004081 u32 prefered_lft, u32 valid_lft)
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09004082{
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07004083 u32 flags;
4084 clock_t expires;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09004085 unsigned long timeout;
Jiri Pirko53bd6742013-12-06 09:45:22 +01004086 bool was_managetempaddr;
Thomas Haller5b84efe2014-01-15 15:36:59 +01004087 bool had_prefixroute;
YOSHIFUJI Hideaki46d48042007-02-07 20:36:26 +09004088
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01004089 ASSERT_RTNL();
4090
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09004091 if (!valid_lft || (prefered_lft > valid_lft))
4092 return -EINVAL;
4093
Jiri Pirko53bd6742013-12-06 09:45:22 +01004094 if (ifa_flags & IFA_F_MANAGETEMPADDR &&
4095 (ifp->flags & IFA_F_TEMPORARY || ifp->prefix_len != 64))
4096 return -EINVAL;
4097
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09004098 timeout = addrconf_timeout_fixup(valid_lft, HZ);
4099 if (addrconf_finite_timeout(timeout)) {
4100 expires = jiffies_to_clock_t(timeout * HZ);
4101 valid_lft = timeout;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07004102 flags = RTF_EXPIRES;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09004103 } else {
4104 expires = 0;
4105 flags = 0;
4106 ifa_flags |= IFA_F_PERMANENT;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07004107 }
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09004108
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09004109 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
4110 if (addrconf_finite_timeout(timeout)) {
4111 if (timeout == 0)
4112 ifa_flags |= IFA_F_DEPRECATED;
4113 prefered_lft = timeout;
4114 }
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09004115
4116 spin_lock_bh(&ifp->lock);
Jiri Pirko53bd6742013-12-06 09:45:22 +01004117 was_managetempaddr = ifp->flags & IFA_F_MANAGETEMPADDR;
Thomas Haller5b84efe2014-01-15 15:36:59 +01004118 had_prefixroute = ifp->flags & IFA_F_PERMANENT &&
4119 !(ifp->flags & IFA_F_NOPREFIXROUTE);
Jiri Pirko53bd6742013-12-06 09:45:22 +01004120 ifp->flags &= ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD |
Thomas Haller761aac72014-01-15 15:36:58 +01004121 IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR |
4122 IFA_F_NOPREFIXROUTE);
Jiri Pirko53bd6742013-12-06 09:45:22 +01004123 ifp->flags |= ifa_flags;
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09004124 ifp->tstamp = jiffies;
4125 ifp->valid_lft = valid_lft;
4126 ifp->prefered_lft = prefered_lft;
4127
4128 spin_unlock_bh(&ifp->lock);
4129 if (!(ifp->flags&IFA_F_TENTATIVE))
4130 ipv6_ifa_notify(0, ifp);
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09004131
Thomas Haller761aac72014-01-15 15:36:58 +01004132 if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) {
4133 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
4134 expires, flags);
Thomas Haller5b84efe2014-01-15 15:36:59 +01004135 } else if (had_prefixroute) {
4136 enum cleanup_prefix_rt_t action;
4137 unsigned long rt_expires;
4138
4139 write_lock_bh(&ifp->idev->lock);
4140 action = check_cleanup_prefix_route(ifp, &rt_expires);
4141 write_unlock_bh(&ifp->idev->lock);
4142
4143 if (action != CLEANUP_PREFIX_RT_NOP) {
4144 cleanup_prefix_route(ifp, rt_expires,
4145 action == CLEANUP_PREFIX_RT_DEL);
4146 }
Thomas Haller761aac72014-01-15 15:36:58 +01004147 }
Jiri Pirko53bd6742013-12-06 09:45:22 +01004148
4149 if (was_managetempaddr || ifp->flags & IFA_F_MANAGETEMPADDR) {
4150 if (was_managetempaddr && !(ifp->flags & IFA_F_MANAGETEMPADDR))
4151 valid_lft = prefered_lft = 0;
4152 manage_tempaddrs(ifp->idev, ifp, valid_lft, prefered_lft,
4153 !was_managetempaddr, jiffies);
4154 }
4155
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01004156 addrconf_verify_rtnl();
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09004157
4158 return 0;
4159}
4160
4161static int
Thomas Graf661d2962013-03-21 07:45:29 +00004162inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004163{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09004164 struct net *net = sock_net(skb->sk);
Thomas Graf461d8832006-09-18 00:09:49 -07004165 struct ifaddrmsg *ifm;
4166 struct nlattr *tb[IFA_MAX+1];
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004167 struct in6_addr *pfx, *peer_pfx;
Thomas Graf7198f8c2006-09-18 00:13:46 -07004168 struct inet6_ifaddr *ifa;
4169 struct net_device *dev;
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07004170 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
Jiri Pirko479840f2013-12-06 09:45:21 +01004171 u32 ifa_flags;
Thomas Graf461d8832006-09-18 00:09:49 -07004172 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004173
Thomas Graf461d8832006-09-18 00:09:49 -07004174 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
4175 if (err < 0)
4176 return err;
4177
4178 ifm = nlmsg_data(nlh);
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004179 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx);
Ian Morris63159f22015-03-29 14:00:04 +01004180 if (!pfx)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004181 return -EINVAL;
4182
Thomas Graf461d8832006-09-18 00:09:49 -07004183 if (tb[IFA_CACHEINFO]) {
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09004184 struct ifa_cacheinfo *ci;
Thomas Graf461d8832006-09-18 00:09:49 -07004185
4186 ci = nla_data(tb[IFA_CACHEINFO]);
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09004187 valid_lft = ci->ifa_valid;
Thomas Graf461d8832006-09-18 00:09:49 -07004188 preferred_lft = ci->ifa_prefered;
4189 } else {
4190 preferred_lft = INFINITY_LIFE_TIME;
4191 valid_lft = INFINITY_LIFE_TIME;
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09004192 }
4193
Daniel Lezcanoaf284932008-03-05 10:46:57 -08004194 dev = __dev_get_by_index(net, ifm->ifa_index);
Ian Morris63159f22015-03-29 14:00:04 +01004195 if (!dev)
Thomas Graf7198f8c2006-09-18 00:13:46 -07004196 return -ENODEV;
4197
Jiri Pirko479840f2013-12-06 09:45:21 +01004198 ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags;
4199
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07004200 /* We ignore other flags so far. */
Thomas Haller761aac72014-01-15 15:36:58 +01004201 ifa_flags &= IFA_F_NODAD | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR |
Madhu Challa93a714d2015-02-25 09:58:35 -08004202 IFA_F_NOPREFIXROUTE | IFA_F_MCAUTOJOIN;
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07004203
Daniel Lezcano1cab3da2008-01-10 22:44:09 -08004204 ifa = ipv6_get_ifaddr(net, pfx, dev, 1);
Ian Morris63159f22015-03-29 14:00:04 +01004205 if (!ifa) {
Thomas Graf7198f8c2006-09-18 00:13:46 -07004206 /*
4207 * It would be best to check for !NLM_F_CREATE here but
stephen hemmingerdb9c7c32014-01-12 11:26:32 -08004208 * userspace already relies on not having to provide this.
Thomas Graf7198f8c2006-09-18 00:13:46 -07004209 */
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004210 return inet6_addr_add(net, ifm->ifa_index, pfx, peer_pfx,
Daniel Lezcanoaf284932008-03-05 10:46:57 -08004211 ifm->ifa_prefixlen, ifa_flags,
4212 preferred_lft, valid_lft);
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09004213 }
4214
Thomas Graf7198f8c2006-09-18 00:13:46 -07004215 if (nlh->nlmsg_flags & NLM_F_EXCL ||
4216 !(nlh->nlmsg_flags & NLM_F_REPLACE))
4217 err = -EEXIST;
4218 else
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07004219 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
Thomas Graf7198f8c2006-09-18 00:13:46 -07004220
4221 in6_ifa_put(ifa);
4222
4223 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004224}
4225
Jiri Pirko479840f2013-12-06 09:45:21 +01004226static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u32 flags,
Thomas Graf101bb222006-09-18 00:11:52 -07004227 u8 scope, int ifindex)
4228{
4229 struct ifaddrmsg *ifm;
4230
4231 ifm = nlmsg_data(nlh);
4232 ifm->ifa_family = AF_INET6;
4233 ifm->ifa_prefixlen = prefixlen;
4234 ifm->ifa_flags = flags;
4235 ifm->ifa_scope = scope;
4236 ifm->ifa_index = ifindex;
4237}
4238
Thomas Graf85486af2006-09-18 00:11:24 -07004239static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
4240 unsigned long tstamp, u32 preferred, u32 valid)
4241{
4242 struct ifa_cacheinfo ci;
4243
Thomas Graf18a31e12010-11-17 04:12:02 +00004244 ci.cstamp = cstamp_delta(cstamp);
4245 ci.tstamp = cstamp_delta(tstamp);
Thomas Graf85486af2006-09-18 00:11:24 -07004246 ci.ifa_prefered = preferred;
4247 ci.ifa_valid = valid;
4248
4249 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
4250}
4251
Thomas Graf101bb222006-09-18 00:11:52 -07004252static inline int rt_scope(int ifa_scope)
4253{
4254 if (ifa_scope & IFA_HOST)
4255 return RT_SCOPE_HOST;
4256 else if (ifa_scope & IFA_LINK)
4257 return RT_SCOPE_LINK;
4258 else if (ifa_scope & IFA_SITE)
4259 return RT_SCOPE_SITE;
4260 else
4261 return RT_SCOPE_UNIVERSE;
4262}
4263
Thomas Graf0ab68032006-09-18 00:12:35 -07004264static inline int inet6_ifaddr_msgsize(void)
4265{
Thomas Graf339bf982006-11-10 14:10:15 -08004266 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004267 + nla_total_size(16) /* IFA_LOCAL */
Thomas Graf339bf982006-11-10 14:10:15 -08004268 + nla_total_size(16) /* IFA_ADDRESS */
Jiri Pirko479840f2013-12-06 09:45:21 +01004269 + nla_total_size(sizeof(struct ifa_cacheinfo))
4270 + nla_total_size(4) /* IFA_FLAGS */;
Thomas Graf0ab68032006-09-18 00:12:35 -07004271}
YOSHIFUJI Hideakic5396a32006-06-17 22:48:48 -07004272
Linus Torvalds1da177e2005-04-16 15:20:36 -07004273static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004274 u32 portid, u32 seq, int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004275{
Linus Torvalds1da177e2005-04-16 15:20:36 -07004276 struct nlmsghdr *nlh;
Thomas Graf85486af2006-09-18 00:11:24 -07004277 u32 preferred, valid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004278
Eric W. Biederman15e47302012-09-07 20:12:54 +00004279 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags);
Ian Morris63159f22015-03-29 14:00:04 +01004280 if (!nlh)
Patrick McHardy26932562007-01-31 23:16:40 -08004281 return -EMSGSIZE;
Thomas Graf0ab68032006-09-18 00:12:35 -07004282
Thomas Graf101bb222006-09-18 00:11:52 -07004283 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
4284 ifa->idev->dev->ifindex);
4285
Yasushi Asanofad8da32013-12-31 12:04:19 +09004286 if (!((ifa->flags&IFA_F_PERMANENT) &&
4287 (ifa->prefered_lft == INFINITY_LIFE_TIME))) {
Thomas Graf85486af2006-09-18 00:11:24 -07004288 preferred = ifa->prefered_lft;
4289 valid = ifa->valid_lft;
4290 if (preferred != INFINITY_LIFE_TIME) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004291 long tval = (jiffies - ifa->tstamp)/HZ;
Jens Rosenbooma1faa692009-06-25 04:55:50 +00004292 if (preferred > tval)
4293 preferred -= tval;
4294 else
4295 preferred = 0;
Ben Hutchingsf56619f2010-06-26 11:37:47 +00004296 if (valid != INFINITY_LIFE_TIME) {
4297 if (valid > tval)
4298 valid -= tval;
4299 else
4300 valid = 0;
4301 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004302 }
4303 } else {
Thomas Graf85486af2006-09-18 00:11:24 -07004304 preferred = INFINITY_LIFE_TIME;
4305 valid = INFINITY_LIFE_TIME;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004306 }
Thomas Graf85486af2006-09-18 00:11:24 -07004307
Cong Wang7996c792013-05-22 05:41:06 +00004308 if (!ipv6_addr_any(&ifa->peer_addr)) {
Jiri Benc930345e2015-03-29 16:59:25 +02004309 if (nla_put_in6_addr(skb, IFA_LOCAL, &ifa->addr) < 0 ||
4310 nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->peer_addr) < 0)
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004311 goto error;
4312 } else
Jiri Benc930345e2015-03-29 16:59:25 +02004313 if (nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->addr) < 0)
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004314 goto error;
4315
4316 if (put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0)
4317 goto error;
Thomas Graf85486af2006-09-18 00:11:24 -07004318
Jiri Pirko479840f2013-12-06 09:45:21 +01004319 if (nla_put_u32(skb, IFA_FLAGS, ifa->flags) < 0)
4320 goto error;
4321
Johannes Berg053c0952015-01-16 22:09:00 +01004322 nlmsg_end(skb, nlh);
4323 return 0;
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004324
4325error:
4326 nlmsg_cancel(skb, nlh);
4327 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004328}
4329
4330static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004331 u32 portid, u32 seq, int event, u16 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004332{
Linus Torvalds1da177e2005-04-16 15:20:36 -07004333 struct nlmsghdr *nlh;
Thomas Graf101bb222006-09-18 00:11:52 -07004334 u8 scope = RT_SCOPE_UNIVERSE;
4335 int ifindex = ifmca->idev->dev->ifindex;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004336
Thomas Graf101bb222006-09-18 00:11:52 -07004337 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
4338 scope = RT_SCOPE_SITE;
4339
Eric W. Biederman15e47302012-09-07 20:12:54 +00004340 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags);
Ian Morris63159f22015-03-29 14:00:04 +01004341 if (!nlh)
Patrick McHardy26932562007-01-31 23:16:40 -08004342 return -EMSGSIZE;
Thomas Graf0ab68032006-09-18 00:12:35 -07004343
Thomas Graf101bb222006-09-18 00:11:52 -07004344 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
Jiri Benc930345e2015-03-29 16:59:25 +02004345 if (nla_put_in6_addr(skb, IFA_MULTICAST, &ifmca->mca_addr) < 0 ||
Thomas Graf0ab68032006-09-18 00:12:35 -07004346 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
Patrick McHardy26932562007-01-31 23:16:40 -08004347 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
4348 nlmsg_cancel(skb, nlh);
4349 return -EMSGSIZE;
4350 }
Thomas Graf85486af2006-09-18 00:11:24 -07004351
Johannes Berg053c0952015-01-16 22:09:00 +01004352 nlmsg_end(skb, nlh);
4353 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004354}
4355
4356static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004357 u32 portid, u32 seq, int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004358{
Linus Torvalds1da177e2005-04-16 15:20:36 -07004359 struct nlmsghdr *nlh;
Thomas Graf101bb222006-09-18 00:11:52 -07004360 u8 scope = RT_SCOPE_UNIVERSE;
4361 int ifindex = ifaca->aca_idev->dev->ifindex;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004362
Thomas Graf101bb222006-09-18 00:11:52 -07004363 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
4364 scope = RT_SCOPE_SITE;
4365
Eric W. Biederman15e47302012-09-07 20:12:54 +00004366 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags);
Ian Morris63159f22015-03-29 14:00:04 +01004367 if (!nlh)
Patrick McHardy26932562007-01-31 23:16:40 -08004368 return -EMSGSIZE;
Thomas Graf0ab68032006-09-18 00:12:35 -07004369
Thomas Graf101bb222006-09-18 00:11:52 -07004370 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
Jiri Benc930345e2015-03-29 16:59:25 +02004371 if (nla_put_in6_addr(skb, IFA_ANYCAST, &ifaca->aca_addr) < 0 ||
Thomas Graf0ab68032006-09-18 00:12:35 -07004372 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
Patrick McHardy26932562007-01-31 23:16:40 -08004373 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
4374 nlmsg_cancel(skb, nlh);
4375 return -EMSGSIZE;
4376 }
Thomas Graf85486af2006-09-18 00:11:24 -07004377
Johannes Berg053c0952015-01-16 22:09:00 +01004378 nlmsg_end(skb, nlh);
4379 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004380}
4381
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004382enum addr_type_t {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004383 UNICAST_ADDR,
4384 MULTICAST_ADDR,
4385 ANYCAST_ADDR,
4386};
4387
Eric Dumazet234b27c2009-11-12 04:11:50 +00004388/* called with rcu_read_lock() */
4389static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb,
4390 struct netlink_callback *cb, enum addr_type_t type,
4391 int s_ip_idx, int *p_ip_idx)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004392{
Linus Torvalds1da177e2005-04-16 15:20:36 -07004393 struct ifmcaddr6 *ifmca;
4394 struct ifacaddr6 *ifaca;
Eric Dumazet234b27c2009-11-12 04:11:50 +00004395 int err = 1;
4396 int ip_idx = *p_ip_idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004397
Eric Dumazet234b27c2009-11-12 04:11:50 +00004398 read_lock_bh(&idev->lock);
4399 switch (type) {
stephen hemminger502a2ff2010-03-17 20:31:13 +00004400 case UNICAST_ADDR: {
4401 struct inet6_ifaddr *ifa;
4402
Eric Dumazet234b27c2009-11-12 04:11:50 +00004403 /* unicast address incl. temp addr */
stephen hemminger502a2ff2010-03-17 20:31:13 +00004404 list_for_each_entry(ifa, &idev->addr_list, if_list) {
4405 if (++ip_idx < s_ip_idx)
Eric Dumazet234b27c2009-11-12 04:11:50 +00004406 continue;
4407 err = inet6_fill_ifaddr(skb, ifa,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004408 NETLINK_CB(cb->skb).portid,
Eric Dumazet234b27c2009-11-12 04:11:50 +00004409 cb->nlh->nlmsg_seq,
4410 RTM_NEWADDR,
4411 NLM_F_MULTI);
Johannes Berg053c0952015-01-16 22:09:00 +01004412 if (err < 0)
Eric Dumazet234b27c2009-11-12 04:11:50 +00004413 break;
Nicolas Dichtel63998ac2013-03-22 06:28:43 +00004414 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004415 }
Eric Dumazet234b27c2009-11-12 04:11:50 +00004416 break;
stephen hemminger502a2ff2010-03-17 20:31:13 +00004417 }
Eric Dumazet234b27c2009-11-12 04:11:50 +00004418 case MULTICAST_ADDR:
4419 /* multicast address */
4420 for (ifmca = idev->mc_list; ifmca;
4421 ifmca = ifmca->next, ip_idx++) {
4422 if (ip_idx < s_ip_idx)
4423 continue;
4424 err = inet6_fill_ifmcaddr(skb, ifmca,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004425 NETLINK_CB(cb->skb).portid,
Eric Dumazet234b27c2009-11-12 04:11:50 +00004426 cb->nlh->nlmsg_seq,
4427 RTM_GETMULTICAST,
4428 NLM_F_MULTI);
Johannes Berg053c0952015-01-16 22:09:00 +01004429 if (err < 0)
Eric Dumazet234b27c2009-11-12 04:11:50 +00004430 break;
4431 }
4432 break;
4433 case ANYCAST_ADDR:
4434 /* anycast address */
4435 for (ifaca = idev->ac_list; ifaca;
4436 ifaca = ifaca->aca_next, ip_idx++) {
4437 if (ip_idx < s_ip_idx)
4438 continue;
4439 err = inet6_fill_ifacaddr(skb, ifaca,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004440 NETLINK_CB(cb->skb).portid,
Eric Dumazet234b27c2009-11-12 04:11:50 +00004441 cb->nlh->nlmsg_seq,
4442 RTM_GETANYCAST,
4443 NLM_F_MULTI);
Johannes Berg053c0952015-01-16 22:09:00 +01004444 if (err < 0)
Eric Dumazet234b27c2009-11-12 04:11:50 +00004445 break;
4446 }
4447 break;
4448 default:
4449 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004450 }
Eric Dumazet234b27c2009-11-12 04:11:50 +00004451 read_unlock_bh(&idev->lock);
4452 *p_ip_idx = ip_idx;
4453 return err;
4454}
4455
4456static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
4457 enum addr_type_t type)
4458{
4459 struct net *net = sock_net(skb->sk);
4460 int h, s_h;
4461 int idx, ip_idx;
4462 int s_idx, s_ip_idx;
4463 struct net_device *dev;
4464 struct inet6_dev *idev;
4465 struct hlist_head *head;
Eric Dumazet234b27c2009-11-12 04:11:50 +00004466
4467 s_h = cb->args[0];
4468 s_idx = idx = cb->args[1];
4469 s_ip_idx = ip_idx = cb->args[2];
4470
4471 rcu_read_lock();
Nicolas Dichtel63998ac2013-03-22 06:28:43 +00004472 cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ net->dev_base_seq;
Eric Dumazet234b27c2009-11-12 04:11:50 +00004473 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4474 idx = 0;
4475 head = &net->dev_index_head[h];
Sasha Levinb67bfe02013-02-27 17:06:00 -08004476 hlist_for_each_entry_rcu(dev, head, index_hlist) {
Eric Dumazet234b27c2009-11-12 04:11:50 +00004477 if (idx < s_idx)
4478 goto cont;
Patrick McHardy4b97efd2010-03-26 20:27:49 -07004479 if (h > s_h || idx > s_idx)
Eric Dumazet234b27c2009-11-12 04:11:50 +00004480 s_ip_idx = 0;
4481 ip_idx = 0;
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004482 idev = __in6_dev_get(dev);
4483 if (!idev)
Eric Dumazet234b27c2009-11-12 04:11:50 +00004484 goto cont;
4485
4486 if (in6_dump_addrs(idev, skb, cb, type,
David S. Miller7b46a642015-01-18 23:36:08 -05004487 s_ip_idx, &ip_idx) < 0)
Eric Dumazet234b27c2009-11-12 04:11:50 +00004488 goto done;
4489cont:
4490 idx++;
4491 }
4492 }
4493done:
4494 rcu_read_unlock();
4495 cb->args[0] = h;
4496 cb->args[1] = idx;
4497 cb->args[2] = ip_idx;
4498
Linus Torvalds1da177e2005-04-16 15:20:36 -07004499 return skb->len;
4500}
4501
4502static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
4503{
4504 enum addr_type_t type = UNICAST_ADDR;
Denis V. Lunevb8542722007-12-01 00:21:31 +11004505
Linus Torvalds1da177e2005-04-16 15:20:36 -07004506 return inet6_dump_addr(skb, cb, type);
4507}
4508
4509static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
4510{
4511 enum addr_type_t type = MULTICAST_ADDR;
Denis V. Lunevb8542722007-12-01 00:21:31 +11004512
Linus Torvalds1da177e2005-04-16 15:20:36 -07004513 return inet6_dump_addr(skb, cb, type);
4514}
4515
4516
4517static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
4518{
4519 enum addr_type_t type = ANYCAST_ADDR;
Denis V. Lunevb8542722007-12-01 00:21:31 +11004520
Linus Torvalds1da177e2005-04-16 15:20:36 -07004521 return inet6_dump_addr(skb, cb, type);
4522}
4523
Thomas Graf661d2962013-03-21 07:45:29 +00004524static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh)
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004525{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09004526 struct net *net = sock_net(in_skb->sk);
Thomas Graf1b29fc22006-09-18 00:10:50 -07004527 struct ifaddrmsg *ifm;
4528 struct nlattr *tb[IFA_MAX+1];
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004529 struct in6_addr *addr = NULL, *peer;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004530 struct net_device *dev = NULL;
4531 struct inet6_ifaddr *ifa;
4532 struct sk_buff *skb;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004533 int err;
4534
Thomas Graf1b29fc22006-09-18 00:10:50 -07004535 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
4536 if (err < 0)
4537 goto errout;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004538
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004539 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer);
Ian Morris63159f22015-03-29 14:00:04 +01004540 if (!addr) {
Thomas Graf1b29fc22006-09-18 00:10:50 -07004541 err = -EINVAL;
4542 goto errout;
4543 }
4544
4545 ifm = nlmsg_data(nlh);
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004546 if (ifm->ifa_index)
Benjamin Thery6fda7352008-03-05 10:47:47 -08004547 dev = __dev_get_by_index(net, ifm->ifa_index);
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004548
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004549 ifa = ipv6_get_ifaddr(net, addr, dev, 1);
4550 if (!ifa) {
Thomas Graf1b29fc22006-09-18 00:10:50 -07004551 err = -EADDRNOTAVAIL;
4552 goto errout;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004553 }
4554
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004555 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL);
4556 if (!skb) {
Thomas Graf1b29fc22006-09-18 00:10:50 -07004557 err = -ENOBUFS;
4558 goto errout_ifa;
4559 }
4560
Eric W. Biederman15e47302012-09-07 20:12:54 +00004561 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).portid,
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004562 nlh->nlmsg_seq, RTM_NEWADDR, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08004563 if (err < 0) {
4564 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4565 WARN_ON(err == -EMSGSIZE);
4566 kfree_skb(skb);
4567 goto errout_ifa;
4568 }
Eric W. Biederman15e47302012-09-07 20:12:54 +00004569 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
Thomas Graf1b29fc22006-09-18 00:10:50 -07004570errout_ifa:
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004571 in6_ifa_put(ifa);
Thomas Graf1b29fc22006-09-18 00:10:50 -07004572errout:
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004573 return err;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004574}
4575
Linus Torvalds1da177e2005-04-16 15:20:36 -07004576static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
4577{
4578 struct sk_buff *skb;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09004579 struct net *net = dev_net(ifa->idev->dev);
Thomas Graf5d620262006-08-15 00:35:02 -07004580 int err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004581
Thomas Graf0ab68032006-09-18 00:12:35 -07004582 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
Ian Morris63159f22015-03-29 14:00:04 +01004583 if (!skb)
Thomas Graf5d620262006-08-15 00:35:02 -07004584 goto errout;
4585
4586 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08004587 if (err < 0) {
4588 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4589 WARN_ON(err == -EMSGSIZE);
4590 kfree_skb(skb);
4591 goto errout;
4592 }
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -08004593 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
4594 return;
Thomas Graf5d620262006-08-15 00:35:02 -07004595errout:
4596 if (err < 0)
Benjamin Thery6fda7352008-03-05 10:47:47 -08004597 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004598}
4599
Dave Jonesb6f99a22007-03-22 12:27:49 -07004600static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004601 __s32 *array, int bytes)
4602{
Thomas Graf04561c12006-11-14 19:53:58 -08004603 BUG_ON(bytes < (DEVCONF_MAX * 4));
4604
Linus Torvalds1da177e2005-04-16 15:20:36 -07004605 memset(array, 0, bytes);
4606 array[DEVCONF_FORWARDING] = cnf->forwarding;
4607 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
4608 array[DEVCONF_MTU6] = cnf->mtu6;
4609 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
4610 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
4611 array[DEVCONF_AUTOCONF] = cnf->autoconf;
4612 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
4613 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
Thomas Graf93908d12010-11-17 01:44:24 +00004614 array[DEVCONF_RTR_SOLICIT_INTERVAL] =
4615 jiffies_to_msecs(cnf->rtr_solicit_interval);
4616 array[DEVCONF_RTR_SOLICIT_DELAY] =
4617 jiffies_to_msecs(cnf->rtr_solicit_delay);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004618 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
Hannes Frederic Sowafc4eba52013-08-14 01:03:46 +02004619 array[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL] =
4620 jiffies_to_msecs(cnf->mldv1_unsolicited_report_interval);
4621 array[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL] =
4622 jiffies_to_msecs(cnf->mldv2_unsolicited_report_interval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004623 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
4624 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
4625 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
4626 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
4627 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004628 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -08004629 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
Hangbin Liu8013d1d2015-07-30 14:28:42 +08004630 array[DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT] = cnf->accept_ra_min_hop_limit;
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -08004631 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08004632#ifdef CONFIG_IPV6_ROUTER_PREF
4633 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
Thomas Graf93908d12010-11-17 01:44:24 +00004634 array[DEVCONF_RTR_PROBE_INTERVAL] =
4635 jiffies_to_msecs(cnf->rtr_probe_interval);
Neil Hormanfa03ef32007-01-30 14:30:10 -08004636#ifdef CONFIG_IPV6_ROUTE_INFO
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -08004637 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
4638#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08004639#endif
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -07004640 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -07004641 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
Neil Horman95c385b2007-04-25 17:08:10 -07004642#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4643 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
Erik Kline7fd25612014-10-28 18:11:14 +09004644 array[DEVCONF_USE_OPTIMISTIC] = cnf->use_optimistic;
Neil Horman95c385b2007-04-25 17:08:10 -07004645#endif
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09004646#ifdef CONFIG_IPV6_MROUTE
4647 array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding;
4648#endif
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +09004649 array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6;
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09004650 array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad;
Cosmin Ratiuc3faca02009-10-09 03:11:14 +00004651 array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao;
Hannes Frederic Sowa5cb04432012-11-06 16:46:20 +00004652 array[DEVCONF_NDISC_NOTIFY] = cnf->ndisc_notify;
Hannes Frederic Sowab800c3b2013-08-27 01:36:51 +02004653 array[DEVCONF_SUPPRESS_FRAG_NDISC] = cnf->suppress_frag_ndisc;
Ben Greeard9333192014-06-25 14:44:53 -07004654 array[DEVCONF_ACCEPT_RA_FROM_LOCAL] = cnf->accept_ra_from_local;
Harout Hedeshianc2943f12015-01-20 10:06:05 -07004655 array[DEVCONF_ACCEPT_RA_MTU] = cnf->accept_ra_mtu;
Andy Gospodarek35103d12015-08-13 10:39:01 -04004656 array[DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN] = cnf->ignore_routes_with_linkdown;
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +01004657 /* we omit DEVCONF_STABLE_SECRET for now */
Erik Kline3985e8a2015-07-22 16:38:25 +09004658 array[DEVCONF_USE_OIF_ADDRS_ONLY] = cnf->use_oif_addrs_only;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004659}
4660
Thomas Grafb382b192010-11-16 04:33:57 +00004661static inline size_t inet6_ifla6_size(void)
4662{
4663 return nla_total_size(4) /* IFLA_INET6_FLAGS */
4664 + nla_total_size(sizeof(struct ifla_cacheinfo))
4665 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
4666 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004667 + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
4668 + nla_total_size(sizeof(struct in6_addr)); /* IFLA_INET6_TOKEN */
Thomas Grafb382b192010-11-16 04:33:57 +00004669}
4670
Thomas Graf339bf982006-11-10 14:10:15 -08004671static inline size_t inet6_if_nlmsg_size(void)
4672{
4673 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
4674 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
4675 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
4676 + nla_total_size(4) /* IFLA_MTU */
4677 + nla_total_size(4) /* IFLA_LINK */
Andy Gospodarek03443382015-08-13 15:26:35 -04004678 + nla_total_size(1) /* IFLA_OPERSTATE */
Thomas Grafb382b192010-11-16 04:33:57 +00004679 + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
Thomas Graf339bf982006-11-10 14:10:15 -08004680}
YOSHIFUJI Hideakic5396a32006-06-17 22:48:48 -07004681
Eric Dumazetbe281e52011-05-19 01:14:23 +00004682static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib,
Tejun Heo7d720c32010-02-16 15:20:26 +00004683 int items, int bytes)
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004684{
4685 int i;
4686 int pad = bytes - sizeof(u64) * items;
4687 BUG_ON(pad < 0);
4688
4689 /* Use put_unaligned() because stats may not be aligned for u64. */
4690 put_unaligned(items, &stats[0]);
4691 for (i = 1; i < items; i++)
Eric Dumazetbe281e52011-05-19 01:14:23 +00004692 put_unaligned(atomic_long_read(&mib[i]), &stats[i]);
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004693
4694 memset(&stats[items], 0, pad);
4695}
4696
WANG Cong698365f2014-05-05 15:55:55 -07004697static inline void __snmp6_fill_stats64(u64 *stats, void __percpu *mib,
Raghavendra K Ta3a77372015-08-30 11:29:42 +05304698 int bytes, size_t syncpoff)
Eric Dumazet4ce3c182010-06-30 13:31:19 -07004699{
Raghavendra K Ta3a77372015-08-30 11:29:42 +05304700 int i, c;
4701 u64 buff[IPSTATS_MIB_MAX];
4702 int pad = bytes - sizeof(u64) * IPSTATS_MIB_MAX;
4703
Eric Dumazet4ce3c182010-06-30 13:31:19 -07004704 BUG_ON(pad < 0);
4705
Raghavendra K Ta3a77372015-08-30 11:29:42 +05304706 memset(buff, 0, sizeof(buff));
4707 buff[0] = IPSTATS_MIB_MAX;
Eric Dumazet4ce3c182010-06-30 13:31:19 -07004708
Raghavendra K Ta3a77372015-08-30 11:29:42 +05304709 for_each_possible_cpu(c) {
4710 for (i = 1; i < IPSTATS_MIB_MAX; i++)
4711 buff[i] += snmp_get_cpu_field64(mib, c, i, syncpoff);
4712 }
4713
4714 memcpy(stats, buff, IPSTATS_MIB_MAX * sizeof(u64));
4715 memset(&stats[IPSTATS_MIB_MAX], 0, pad);
Eric Dumazet4ce3c182010-06-30 13:31:19 -07004716}
4717
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004718static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
4719 int bytes)
4720{
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004721 switch (attrtype) {
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004722 case IFLA_INET6_STATS:
Raghavendra K Ta3a77372015-08-30 11:29:42 +05304723 __snmp6_fill_stats64(stats, idev->stats.ipv6, bytes,
4724 offsetof(struct ipstats_mib, syncp));
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004725 break;
4726 case IFLA_INET6_ICMP6STATS:
Eric Dumazetbe281e52011-05-19 01:14:23 +00004727 __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, ICMP6_MIB_MAX, bytes);
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004728 break;
4729 }
4730}
4731
Thomas Grafb382b192010-11-16 04:33:57 +00004732static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004733{
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07004734 struct nlattr *nla;
Thomas Graf04561c12006-11-14 19:53:58 -08004735 struct ifla_cacheinfo ci;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004736
David S. Millerc78679e2012-04-01 20:27:33 -04004737 if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags))
4738 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004739 ci.max_reasm_len = IPV6_MAXPLEN;
David S. Miller24912422010-11-19 13:13:47 -08004740 ci.tstamp = cstamp_delta(idev->tstamp);
4741 ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time);
Jiri Pirko1f9248e2013-12-07 19:26:53 +01004742 ci.retrans_time = jiffies_to_msecs(NEIGH_VAR(idev->nd_parms, RETRANS_TIME));
David S. Millerc78679e2012-04-01 20:27:33 -04004743 if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci))
4744 goto nla_put_failure;
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07004745 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
Ian Morris63159f22015-03-29 14:00:04 +01004746 if (!nla)
Thomas Graf04561c12006-11-14 19:53:58 -08004747 goto nla_put_failure;
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07004748 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004749
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07004750 /* XXX - MC not implemented */
4751
4752 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
Ian Morris63159f22015-03-29 14:00:04 +01004753 if (!nla)
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07004754 goto nla_put_failure;
4755 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
4756
4757 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
Ian Morris63159f22015-03-29 14:00:04 +01004758 if (!nla)
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07004759 goto nla_put_failure;
4760 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004761
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004762 nla = nla_reserve(skb, IFLA_INET6_TOKEN, sizeof(struct in6_addr));
Ian Morris63159f22015-03-29 14:00:04 +01004763 if (!nla)
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004764 goto nla_put_failure;
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02004765
4766 if (nla_put_u8(skb, IFLA_INET6_ADDR_GEN_MODE, idev->addr_gen_mode))
4767 goto nla_put_failure;
4768
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004769 read_lock_bh(&idev->lock);
4770 memcpy(nla_data(nla), idev->token.s6_addr, nla_len(nla));
4771 read_unlock_bh(&idev->lock);
4772
Thomas Grafb382b192010-11-16 04:33:57 +00004773 return 0;
4774
4775nla_put_failure:
4776 return -EMSGSIZE;
4777}
4778
4779static size_t inet6_get_link_af_size(const struct net_device *dev)
4780{
4781 if (!__in6_dev_get(dev))
4782 return 0;
4783
4784 return inet6_ifla6_size();
4785}
4786
4787static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev)
4788{
4789 struct inet6_dev *idev = __in6_dev_get(dev);
4790
4791 if (!idev)
4792 return -ENODATA;
4793
4794 if (inet6_fill_ifla6_attrs(skb, idev) < 0)
4795 return -EMSGSIZE;
4796
4797 return 0;
4798}
4799
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004800static int inet6_set_iftoken(struct inet6_dev *idev, struct in6_addr *token)
4801{
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004802 struct inet6_ifaddr *ifp;
4803 struct net_device *dev = idev->dev;
Daniel Borkmannfc403832013-04-09 03:47:15 +00004804 bool update_rs = false;
Hannes Frederic Sowadc848292013-06-24 21:42:40 +02004805 struct in6_addr ll_addr;
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004806
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01004807 ASSERT_RTNL();
4808
Ian Morris63159f22015-03-29 14:00:04 +01004809 if (!token)
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004810 return -EINVAL;
4811 if (ipv6_addr_any(token))
4812 return -EINVAL;
4813 if (dev->flags & (IFF_LOOPBACK | IFF_NOARP))
4814 return -EINVAL;
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004815 if (!ipv6_accept_ra(idev))
4816 return -EINVAL;
4817 if (idev->cnf.rtr_solicits <= 0)
4818 return -EINVAL;
4819
4820 write_lock_bh(&idev->lock);
4821
4822 BUILD_BUG_ON(sizeof(token->s6_addr) != 16);
4823 memcpy(idev->token.s6_addr + 8, token->s6_addr + 8, 8);
4824
4825 write_unlock_bh(&idev->lock);
4826
Hannes Frederic Sowadc848292013-06-24 21:42:40 +02004827 if (!idev->dead && (idev->if_flags & IF_READY) &&
4828 !ipv6_get_lladdr(dev, &ll_addr, IFA_F_TENTATIVE |
4829 IFA_F_OPTIMISTIC)) {
Daniel Borkmannfc403832013-04-09 03:47:15 +00004830
4831 /* If we're not ready, then normal ifup will take care
4832 * of this. Otherwise, we need to request our rs here.
4833 */
4834 ndisc_send_rs(dev, &ll_addr, &in6addr_linklocal_allrouters);
4835 update_rs = true;
4836 }
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004837
4838 write_lock_bh(&idev->lock);
Daniel Borkmannfc403832013-04-09 03:47:15 +00004839
Hannes Frederic Sowa77ecaac2013-06-26 03:41:49 +02004840 if (update_rs) {
Daniel Borkmannfc403832013-04-09 03:47:15 +00004841 idev->if_flags |= IF_RS_SENT;
Hannes Frederic Sowa77ecaac2013-06-26 03:41:49 +02004842 idev->rs_probes = 1;
4843 addrconf_mod_rs_timer(idev, idev->cnf.rtr_solicit_interval);
4844 }
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004845
4846 /* Well, that's kinda nasty ... */
4847 list_for_each_entry(ifp, &idev->addr_list, if_list) {
4848 spin_lock(&ifp->lock);
Daniel Borkmann617fe292013-04-09 03:47:16 +00004849 if (ifp->tokenized) {
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004850 ifp->valid_lft = 0;
4851 ifp->prefered_lft = 0;
4852 }
4853 spin_unlock(&ifp->lock);
4854 }
4855
4856 write_unlock_bh(&idev->lock);
Lubomir Rintelb2ed64a2014-10-27 17:39:16 +01004857 inet6_ifinfo_notify(RTM_NEWLINK, idev);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01004858 addrconf_verify_rtnl();
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004859 return 0;
4860}
4861
Daniel Borkmann11b1f822015-02-05 14:39:11 +01004862static const struct nla_policy inet6_af_policy[IFLA_INET6_MAX + 1] = {
4863 [IFLA_INET6_ADDR_GEN_MODE] = { .type = NLA_U8 },
4864 [IFLA_INET6_TOKEN] = { .len = sizeof(struct in6_addr) },
4865};
4866
4867static int inet6_validate_link_af(const struct net_device *dev,
4868 const struct nlattr *nla)
4869{
4870 struct nlattr *tb[IFLA_INET6_MAX + 1];
4871
4872 if (dev && !__in6_dev_get(dev))
4873 return -EAFNOSUPPORT;
4874
4875 return nla_parse_nested(tb, IFLA_INET6_MAX, nla, inet6_af_policy);
4876}
4877
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004878static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla)
4879{
4880 int err = -EINVAL;
4881 struct inet6_dev *idev = __in6_dev_get(dev);
4882 struct nlattr *tb[IFLA_INET6_MAX + 1];
4883
4884 if (!idev)
4885 return -EAFNOSUPPORT;
4886
4887 if (nla_parse_nested(tb, IFLA_INET6_MAX, nla, NULL) < 0)
4888 BUG();
4889
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02004890 if (tb[IFLA_INET6_TOKEN]) {
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004891 err = inet6_set_iftoken(idev, nla_data(tb[IFLA_INET6_TOKEN]));
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02004892 if (err)
4893 return err;
4894 }
4895
4896 if (tb[IFLA_INET6_ADDR_GEN_MODE]) {
4897 u8 mode = nla_get_u8(tb[IFLA_INET6_ADDR_GEN_MODE]);
4898
4899 if (mode != IN6_ADDR_GEN_MODE_EUI64 &&
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01004900 mode != IN6_ADDR_GEN_MODE_NONE &&
4901 mode != IN6_ADDR_GEN_MODE_STABLE_PRIVACY)
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02004902 return -EINVAL;
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01004903
4904 if (mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY &&
4905 !idev->cnf.stable_secret.initialized &&
4906 !dev_net(dev)->ipv6.devconf_dflt->stable_secret.initialized)
4907 return -EINVAL;
4908
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02004909 idev->addr_gen_mode = mode;
4910 err = 0;
4911 }
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004912
4913 return err;
4914}
4915
Thomas Grafb382b192010-11-16 04:33:57 +00004916static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004917 u32 portid, u32 seq, int event, unsigned int flags)
Thomas Grafb382b192010-11-16 04:33:57 +00004918{
4919 struct net_device *dev = idev->dev;
4920 struct ifinfomsg *hdr;
4921 struct nlmsghdr *nlh;
4922 void *protoinfo;
4923
Eric W. Biederman15e47302012-09-07 20:12:54 +00004924 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*hdr), flags);
Ian Morris63159f22015-03-29 14:00:04 +01004925 if (!nlh)
Thomas Grafb382b192010-11-16 04:33:57 +00004926 return -EMSGSIZE;
4927
4928 hdr = nlmsg_data(nlh);
4929 hdr->ifi_family = AF_INET6;
4930 hdr->__ifi_pad = 0;
4931 hdr->ifi_type = dev->type;
4932 hdr->ifi_index = dev->ifindex;
4933 hdr->ifi_flags = dev_get_flags(dev);
4934 hdr->ifi_change = 0;
4935
David S. Millerc78679e2012-04-01 20:27:33 -04004936 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
4937 (dev->addr_len &&
4938 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
4939 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
Nicolas Dichtela54acb32015-04-02 17:07:00 +02004940 (dev->ifindex != dev_get_iflink(dev) &&
Andy Gospodarek03443382015-08-13 15:26:35 -04004941 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
4942 nla_put_u8(skb, IFLA_OPERSTATE,
4943 netif_running(dev) ? dev->operstate : IF_OPER_DOWN))
David S. Millerc78679e2012-04-01 20:27:33 -04004944 goto nla_put_failure;
Thomas Grafb382b192010-11-16 04:33:57 +00004945 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
Ian Morris63159f22015-03-29 14:00:04 +01004946 if (!protoinfo)
Thomas Grafb382b192010-11-16 04:33:57 +00004947 goto nla_put_failure;
4948
4949 if (inet6_fill_ifla6_attrs(skb, idev) < 0)
4950 goto nla_put_failure;
4951
Thomas Graf04561c12006-11-14 19:53:58 -08004952 nla_nest_end(skb, protoinfo);
Johannes Berg053c0952015-01-16 22:09:00 +01004953 nlmsg_end(skb, nlh);
4954 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004955
Thomas Graf04561c12006-11-14 19:53:58 -08004956nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -08004957 nlmsg_cancel(skb, nlh);
4958 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004959}
4960
4961static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
4962{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09004963 struct net *net = sock_net(skb->sk);
Eric Dumazet84d26972009-11-09 12:11:28 +00004964 int h, s_h;
David S. Miller434a8a52009-11-11 18:53:00 -08004965 int idx = 0, s_idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004966 struct net_device *dev;
4967 struct inet6_dev *idev;
Eric Dumazet84d26972009-11-09 12:11:28 +00004968 struct hlist_head *head;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004969
Eric Dumazet84d26972009-11-09 12:11:28 +00004970 s_h = cb->args[0];
4971 s_idx = cb->args[1];
4972
4973 rcu_read_lock();
4974 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4975 idx = 0;
4976 head = &net->dev_index_head[h];
Sasha Levinb67bfe02013-02-27 17:06:00 -08004977 hlist_for_each_entry_rcu(dev, head, index_hlist) {
Eric Dumazet84d26972009-11-09 12:11:28 +00004978 if (idx < s_idx)
4979 goto cont;
4980 idev = __in6_dev_get(dev);
4981 if (!idev)
4982 goto cont;
4983 if (inet6_fill_ifinfo(skb, idev,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004984 NETLINK_CB(cb->skb).portid,
Eric Dumazet84d26972009-11-09 12:11:28 +00004985 cb->nlh->nlmsg_seq,
Johannes Berg053c0952015-01-16 22:09:00 +01004986 RTM_NEWLINK, NLM_F_MULTI) < 0)
Eric Dumazet84d26972009-11-09 12:11:28 +00004987 goto out;
Pavel Emelianov7562f872007-05-03 15:13:45 -07004988cont:
Eric Dumazet84d26972009-11-09 12:11:28 +00004989 idx++;
4990 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004991 }
Eric Dumazet84d26972009-11-09 12:11:28 +00004992out:
4993 rcu_read_unlock();
4994 cb->args[1] = idx;
4995 cb->args[0] = h;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004996
4997 return skb->len;
4998}
4999
5000void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
5001{
5002 struct sk_buff *skb;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09005003 struct net *net = dev_net(idev->dev);
Thomas Graf8d7a76c2006-08-15 00:35:47 -07005004 int err = -ENOBUFS;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09005005
Thomas Graf339bf982006-11-10 14:10:15 -08005006 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
Ian Morris63159f22015-03-29 14:00:04 +01005007 if (!skb)
Thomas Graf8d7a76c2006-08-15 00:35:47 -07005008 goto errout;
5009
5010 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08005011 if (err < 0) {
5012 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
5013 WARN_ON(err == -EMSGSIZE);
5014 kfree_skb(skb);
5015 goto errout;
5016 }
Nicolas Dichtel5f75a102010-12-07 23:38:31 +00005017 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC);
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -08005018 return;
Thomas Graf8d7a76c2006-08-15 00:35:47 -07005019errout:
5020 if (err < 0)
Nicolas Dichtel5f75a102010-12-07 23:38:31 +00005021 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005022}
5023
Thomas Graf339bf982006-11-10 14:10:15 -08005024static inline size_t inet6_prefix_nlmsg_size(void)
5025{
5026 return NLMSG_ALIGN(sizeof(struct prefixmsg))
5027 + nla_total_size(sizeof(struct in6_addr))
5028 + nla_total_size(sizeof(struct prefix_cacheinfo));
5029}
YOSHIFUJI Hideakic5396a32006-06-17 22:48:48 -07005030
Linus Torvalds1da177e2005-04-16 15:20:36 -07005031static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
Eric W. Biederman15e47302012-09-07 20:12:54 +00005032 struct prefix_info *pinfo, u32 portid, u32 seq,
Thomas Graf6051e2f2006-11-14 19:54:19 -08005033 int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005034{
Thomas Graf6051e2f2006-11-14 19:54:19 -08005035 struct prefixmsg *pmsg;
5036 struct nlmsghdr *nlh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005037 struct prefix_cacheinfo ci;
5038
Eric W. Biederman15e47302012-09-07 20:12:54 +00005039 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*pmsg), flags);
Ian Morris63159f22015-03-29 14:00:04 +01005040 if (!nlh)
Patrick McHardy26932562007-01-31 23:16:40 -08005041 return -EMSGSIZE;
Thomas Graf6051e2f2006-11-14 19:54:19 -08005042
5043 pmsg = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005044 pmsg->prefix_family = AF_INET6;
Patrick McHardy8a470772005-06-28 12:56:45 -07005045 pmsg->prefix_pad1 = 0;
5046 pmsg->prefix_pad2 = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005047 pmsg->prefix_ifindex = idev->dev->ifindex;
5048 pmsg->prefix_len = pinfo->prefix_len;
5049 pmsg->prefix_type = pinfo->type;
Patrick McHardy8a470772005-06-28 12:56:45 -07005050 pmsg->prefix_pad3 = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005051 pmsg->prefix_flags = 0;
5052 if (pinfo->onlink)
5053 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
5054 if (pinfo->autoconf)
5055 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
5056
David S. Millerc78679e2012-04-01 20:27:33 -04005057 if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix))
5058 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005059 ci.preferred_time = ntohl(pinfo->prefered);
5060 ci.valid_time = ntohl(pinfo->valid);
David S. Millerc78679e2012-04-01 20:27:33 -04005061 if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci))
5062 goto nla_put_failure;
Johannes Berg053c0952015-01-16 22:09:00 +01005063 nlmsg_end(skb, nlh);
5064 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005065
Thomas Graf6051e2f2006-11-14 19:54:19 -08005066nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -08005067 nlmsg_cancel(skb, nlh);
5068 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005069}
5070
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09005071static void inet6_prefix_notify(int event, struct inet6_dev *idev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005072 struct prefix_info *pinfo)
5073{
5074 struct sk_buff *skb;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09005075 struct net *net = dev_net(idev->dev);
Thomas Graf8c384bfa2006-08-15 00:36:07 -07005076 int err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005077
Thomas Graf339bf982006-11-10 14:10:15 -08005078 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
Ian Morris63159f22015-03-29 14:00:04 +01005079 if (!skb)
Thomas Graf8c384bfa2006-08-15 00:36:07 -07005080 goto errout;
5081
5082 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08005083 if (err < 0) {
5084 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
5085 WARN_ON(err == -EMSGSIZE);
5086 kfree_skb(skb);
5087 goto errout;
5088 }
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -08005089 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
5090 return;
Thomas Graf8c384bfa2006-08-15 00:36:07 -07005091errout:
5092 if (err < 0)
Benjamin Thery6fda7352008-03-05 10:47:47 -08005093 rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005094}
5095
Linus Torvalds1da177e2005-04-16 15:20:36 -07005096static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
5097{
Nicolas Dichtel63998ac2013-03-22 06:28:43 +00005098 struct net *net = dev_net(ifp->idev->dev);
5099
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01005100 if (event)
5101 ASSERT_RTNL();
5102
Linus Torvalds1da177e2005-04-16 15:20:36 -07005103 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
5104
5105 switch (event) {
5106 case RTM_NEWADDR:
Neil Horman95c385b2007-04-25 17:08:10 -07005107 /*
5108 * If the address was optimistic
5109 * we inserted the route at the start of
5110 * our DAD process, so we don't need
5111 * to do it again
5112 */
5113 if (!(ifp->rt->rt6i_node))
5114 ip6_ins_rt(ifp->rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005115 if (ifp->idev->cnf.forwarding)
5116 addrconf_join_anycast(ifp);
Cong Wang7996c792013-05-22 05:41:06 +00005117 if (!ipv6_addr_any(&ifp->peer_addr))
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00005118 addrconf_prefix_route(&ifp->peer_addr, 128,
5119 ifp->idev->dev, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005120 break;
5121 case RTM_DELADDR:
5122 if (ifp->idev->cnf.forwarding)
5123 addrconf_leave_anycast(ifp);
5124 addrconf_leave_solict(ifp->idev, &ifp->addr);
Cong Wang7996c792013-05-22 05:41:06 +00005125 if (!ipv6_addr_any(&ifp->peer_addr)) {
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00005126 struct rt6_info *rt;
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00005127
Nicolas Dichtele7478df2014-09-03 23:59:22 +02005128 rt = addrconf_get_prefix_route(&ifp->peer_addr, 128,
5129 ifp->idev->dev, 0, 0);
Nicolas Dichtelf24062b2014-09-03 23:59:21 +02005130 if (rt && ip6_del_rt(rt))
5131 dst_free(&rt->dst);
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00005132 }
Changli Gaod8d1f302010-06-10 23:31:35 -07005133 dst_hold(&ifp->rt->dst);
stephen hemminger93fa1592010-04-12 05:41:31 +00005134
David S. Miller73a8bd72011-01-23 23:27:15 -08005135 if (ip6_del_rt(ifp->rt))
Changli Gaod8d1f302010-06-10 23:31:35 -07005136 dst_free(&ifp->rt->dst);
Hannes Frederic Sowa705f1c82014-09-28 00:46:06 +02005137
5138 rt_genid_bump_ipv6(net);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005139 break;
5140 }
Nicolas Dichtel63998ac2013-03-22 06:28:43 +00005141 atomic_inc(&net->ipv6.dev_addr_genid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005142}
5143
5144static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
5145{
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07005146 rcu_read_lock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07005147 if (likely(ifp->idev->dead == 0))
5148 __ipv6_ifa_notify(event, ifp);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07005149 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07005150}
5151
5152#ifdef CONFIG_SYSCTL
5153
5154static
Joe Perchesfe2c6332013-06-11 23:04:25 -07005155int addrconf_sysctl_forward(struct ctl_table *ctl, int write,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005156 void __user *buffer, size_t *lenp, loff_t *ppos)
5157{
5158 int *valp = ctl->data;
5159 int val = *valp;
Eric W. Biederman88af1822010-02-19 13:22:59 +00005160 loff_t pos = *ppos;
Joe Perchesfe2c6332013-06-11 23:04:25 -07005161 struct ctl_table lctl;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005162 int ret;
5163
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00005164 /*
5165 * ctl->data points to idev->cnf.forwarding, we should
5166 * not modify it until we get the rtnl lock.
5167 */
5168 lctl = *ctl;
5169 lctl.data = &val;
5170
5171 ret = proc_dointvec(&lctl, write, buffer, lenp, ppos);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005172
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -08005173 if (write)
Stephen Hemmingerb325fdd2009-02-26 06:55:31 +00005174 ret = addrconf_fixup_forwarding(ctl, valp, val);
Eric W. Biederman88af1822010-02-19 13:22:59 +00005175 if (ret)
5176 *ppos = pos;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09005177 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005178}
5179
Marcelo Leitner77751422015-02-23 11:17:13 -03005180static
5181int addrconf_sysctl_mtu(struct ctl_table *ctl, int write,
5182 void __user *buffer, size_t *lenp, loff_t *ppos)
5183{
5184 struct inet6_dev *idev = ctl->extra1;
5185 int min_mtu = IPV6_MIN_MTU;
5186 struct ctl_table lctl;
5187
5188 lctl = *ctl;
5189 lctl.extra1 = &min_mtu;
5190 lctl.extra2 = idev ? &idev->dev->mtu : NULL;
5191
5192 return proc_dointvec_minmax(&lctl, write, buffer, lenp, ppos);
5193}
5194
Brian Haley56d417b2009-06-01 03:07:33 -07005195static void dev_disable_change(struct inet6_dev *idev)
5196{
Cong Wang75538c22013-05-29 11:30:50 +08005197 struct netdev_notifier_info info;
5198
Brian Haley56d417b2009-06-01 03:07:33 -07005199 if (!idev || !idev->dev)
5200 return;
5201
Cong Wang75538c22013-05-29 11:30:50 +08005202 netdev_notifier_info_init(&info, idev->dev);
Brian Haley56d417b2009-06-01 03:07:33 -07005203 if (idev->cnf.disable_ipv6)
Cong Wang75538c22013-05-29 11:30:50 +08005204 addrconf_notify(NULL, NETDEV_DOWN, &info);
Brian Haley56d417b2009-06-01 03:07:33 -07005205 else
Cong Wang75538c22013-05-29 11:30:50 +08005206 addrconf_notify(NULL, NETDEV_UP, &info);
Brian Haley56d417b2009-06-01 03:07:33 -07005207}
5208
5209static void addrconf_disable_change(struct net *net, __s32 newf)
5210{
5211 struct net_device *dev;
5212 struct inet6_dev *idev;
5213
Eric Dumazetc6d14c82009-11-04 05:43:23 -08005214 rcu_read_lock();
5215 for_each_netdev_rcu(net, dev) {
Brian Haley56d417b2009-06-01 03:07:33 -07005216 idev = __in6_dev_get(dev);
5217 if (idev) {
5218 int changed = (!idev->cnf.disable_ipv6) ^ (!newf);
5219 idev->cnf.disable_ipv6 = newf;
5220 if (changed)
5221 dev_disable_change(idev);
5222 }
Brian Haley56d417b2009-06-01 03:07:33 -07005223 }
Eric Dumazetc6d14c82009-11-04 05:43:23 -08005224 rcu_read_unlock();
Brian Haley56d417b2009-06-01 03:07:33 -07005225}
5226
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00005227static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf)
Brian Haley56d417b2009-06-01 03:07:33 -07005228{
5229 struct net *net;
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00005230 int old;
5231
5232 if (!rtnl_trylock())
5233 return restart_syscall();
Brian Haley56d417b2009-06-01 03:07:33 -07005234
5235 net = (struct net *)table->extra2;
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00005236 old = *p;
5237 *p = newf;
Brian Haley56d417b2009-06-01 03:07:33 -07005238
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00005239 if (p == &net->ipv6.devconf_dflt->disable_ipv6) {
5240 rtnl_unlock();
Brian Haley56d417b2009-06-01 03:07:33 -07005241 return 0;
Eric W. Biederman88af1822010-02-19 13:22:59 +00005242 }
Brian Haley56d417b2009-06-01 03:07:33 -07005243
5244 if (p == &net->ipv6.devconf_all->disable_ipv6) {
Brian Haley56d417b2009-06-01 03:07:33 -07005245 net->ipv6.devconf_dflt->disable_ipv6 = newf;
5246 addrconf_disable_change(net, newf);
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00005247 } else if ((!newf) ^ (!old))
Brian Haley56d417b2009-06-01 03:07:33 -07005248 dev_disable_change((struct inet6_dev *)table->extra1);
5249
5250 rtnl_unlock();
5251 return 0;
5252}
5253
5254static
Joe Perchesfe2c6332013-06-11 23:04:25 -07005255int addrconf_sysctl_disable(struct ctl_table *ctl, int write,
Brian Haley56d417b2009-06-01 03:07:33 -07005256 void __user *buffer, size_t *lenp, loff_t *ppos)
5257{
5258 int *valp = ctl->data;
5259 int val = *valp;
Eric W. Biederman88af1822010-02-19 13:22:59 +00005260 loff_t pos = *ppos;
Joe Perchesfe2c6332013-06-11 23:04:25 -07005261 struct ctl_table lctl;
Brian Haley56d417b2009-06-01 03:07:33 -07005262 int ret;
5263
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00005264 /*
5265 * ctl->data points to idev->cnf.disable_ipv6, we should
5266 * not modify it until we get the rtnl lock.
5267 */
5268 lctl = *ctl;
5269 lctl.data = &val;
5270
5271 ret = proc_dointvec(&lctl, write, buffer, lenp, ppos);
Brian Haley56d417b2009-06-01 03:07:33 -07005272
5273 if (write)
5274 ret = addrconf_disable_ipv6(ctl, valp, val);
Eric W. Biederman88af1822010-02-19 13:22:59 +00005275 if (ret)
5276 *ppos = pos;
Brian Haley56d417b2009-06-01 03:07:33 -07005277 return ret;
5278}
5279
stephen hemmingerc92d5492013-12-17 22:37:14 -08005280static
5281int addrconf_sysctl_proxy_ndp(struct ctl_table *ctl, int write,
5282 void __user *buffer, size_t *lenp, loff_t *ppos)
5283{
5284 int *valp = ctl->data;
5285 int ret;
5286 int old, new;
5287
5288 old = *valp;
5289 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
5290 new = *valp;
5291
5292 if (write && old != new) {
5293 struct net *net = ctl->extra2;
5294
5295 if (!rtnl_trylock())
5296 return restart_syscall();
5297
5298 if (valp == &net->ipv6.devconf_dflt->proxy_ndp)
5299 inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH,
5300 NETCONFA_IFINDEX_DEFAULT,
5301 net->ipv6.devconf_dflt);
5302 else if (valp == &net->ipv6.devconf_all->proxy_ndp)
5303 inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH,
5304 NETCONFA_IFINDEX_ALL,
5305 net->ipv6.devconf_all);
5306 else {
5307 struct inet6_dev *idev = ctl->extra1;
5308
5309 inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH,
5310 idev->dev->ifindex,
5311 &idev->cnf);
5312 }
5313 rtnl_unlock();
5314 }
5315
5316 return ret;
5317}
5318
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +01005319static int addrconf_sysctl_stable_secret(struct ctl_table *ctl, int write,
5320 void __user *buffer, size_t *lenp,
5321 loff_t *ppos)
5322{
5323 int err;
5324 struct in6_addr addr;
5325 char str[IPV6_MAX_STRLEN];
5326 struct ctl_table lctl = *ctl;
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01005327 struct net *net = ctl->extra2;
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +01005328 struct ipv6_stable_secret *secret = ctl->data;
5329
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01005330 if (&net->ipv6.devconf_all->stable_secret == ctl->data)
5331 return -EIO;
5332
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +01005333 lctl.maxlen = IPV6_MAX_STRLEN;
5334 lctl.data = str;
5335
5336 if (!rtnl_trylock())
5337 return restart_syscall();
5338
5339 if (!write && !secret->initialized) {
5340 err = -EIO;
5341 goto out;
5342 }
5343
5344 if (!write) {
5345 err = snprintf(str, sizeof(str), "%pI6",
5346 &secret->secret);
5347 if (err >= sizeof(str)) {
5348 err = -EIO;
5349 goto out;
5350 }
5351 }
5352
5353 err = proc_dostring(&lctl, write, buffer, lenp, ppos);
5354 if (err || !write)
5355 goto out;
5356
5357 if (in6_pton(str, -1, addr.in6_u.u6_addr8, -1, NULL) != 1) {
5358 err = -EIO;
5359 goto out;
5360 }
5361
5362 secret->initialized = true;
5363 secret->secret = addr;
5364
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01005365 if (&net->ipv6.devconf_dflt->stable_secret == ctl->data) {
5366 struct net_device *dev;
5367
5368 for_each_netdev(net, dev) {
5369 struct inet6_dev *idev = __in6_dev_get(dev);
5370
5371 if (idev) {
5372 idev->addr_gen_mode =
5373 IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
5374 }
5375 }
5376 } else {
5377 struct inet6_dev *idev = ctl->extra1;
5378
5379 idev->addr_gen_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
5380 }
5381
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +01005382out:
5383 rtnl_unlock();
5384
5385 return err;
5386}
stephen hemmingerc92d5492013-12-17 22:37:14 -08005387
Andy Gospodarek35103d12015-08-13 10:39:01 -04005388static
5389int addrconf_sysctl_ignore_routes_with_linkdown(struct ctl_table *ctl,
5390 int write,
5391 void __user *buffer,
5392 size_t *lenp,
5393 loff_t *ppos)
5394{
5395 int *valp = ctl->data;
5396 int val = *valp;
5397 loff_t pos = *ppos;
5398 struct ctl_table lctl;
5399 int ret;
5400
5401 /* ctl->data points to idev->cnf.ignore_routes_when_linkdown
5402 * we should not modify it until we get the rtnl lock.
5403 */
5404 lctl = *ctl;
5405 lctl.data = &val;
5406
5407 ret = proc_dointvec(&lctl, write, buffer, lenp, ppos);
5408
5409 if (write)
5410 ret = addrconf_fixup_linkdown(ctl, valp, val);
5411 if (ret)
5412 *ppos = pos;
5413 return ret;
5414}
5415
Linus Torvalds1da177e2005-04-16 15:20:36 -07005416static struct addrconf_sysctl_table
5417{
5418 struct ctl_table_header *sysctl_header;
Joe Perchesfe2c6332013-06-11 23:04:25 -07005419 struct ctl_table addrconf_vars[DEVCONF_MAX+1];
Brian Haleyab32ea52006-09-22 14:15:41 -07005420} addrconf_sysctl __read_mostly = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005421 .sysctl_header = NULL,
5422 .addrconf_vars = {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09005423 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005424 .procname = "forwarding",
5425 .data = &ipv6_devconf.forwarding,
5426 .maxlen = sizeof(int),
5427 .mode = 0644,
5428 .proc_handler = addrconf_sysctl_forward,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005429 },
5430 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005431 .procname = "hop_limit",
5432 .data = &ipv6_devconf.hop_limit,
5433 .maxlen = sizeof(int),
5434 .mode = 0644,
5435 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005436 },
5437 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005438 .procname = "mtu",
5439 .data = &ipv6_devconf.mtu6,
5440 .maxlen = sizeof(int),
5441 .mode = 0644,
Marcelo Leitner77751422015-02-23 11:17:13 -03005442 .proc_handler = addrconf_sysctl_mtu,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005443 },
5444 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005445 .procname = "accept_ra",
5446 .data = &ipv6_devconf.accept_ra,
5447 .maxlen = sizeof(int),
5448 .mode = 0644,
5449 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005450 },
5451 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005452 .procname = "accept_redirects",
5453 .data = &ipv6_devconf.accept_redirects,
5454 .maxlen = sizeof(int),
5455 .mode = 0644,
5456 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005457 },
5458 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005459 .procname = "autoconf",
5460 .data = &ipv6_devconf.autoconf,
5461 .maxlen = sizeof(int),
5462 .mode = 0644,
5463 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005464 },
5465 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005466 .procname = "dad_transmits",
5467 .data = &ipv6_devconf.dad_transmits,
5468 .maxlen = sizeof(int),
5469 .mode = 0644,
5470 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005471 },
5472 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005473 .procname = "router_solicitations",
5474 .data = &ipv6_devconf.rtr_solicits,
5475 .maxlen = sizeof(int),
5476 .mode = 0644,
5477 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005478 },
5479 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005480 .procname = "router_solicitation_interval",
5481 .data = &ipv6_devconf.rtr_solicit_interval,
5482 .maxlen = sizeof(int),
5483 .mode = 0644,
5484 .proc_handler = proc_dointvec_jiffies,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005485 },
5486 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005487 .procname = "router_solicitation_delay",
5488 .data = &ipv6_devconf.rtr_solicit_delay,
5489 .maxlen = sizeof(int),
5490 .mode = 0644,
5491 .proc_handler = proc_dointvec_jiffies,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005492 },
5493 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005494 .procname = "force_mld_version",
5495 .data = &ipv6_devconf.force_mld_version,
5496 .maxlen = sizeof(int),
5497 .mode = 0644,
5498 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005499 },
Hannes Frederic Sowafc4eba52013-08-14 01:03:46 +02005500 {
5501 .procname = "mldv1_unsolicited_report_interval",
5502 .data =
5503 &ipv6_devconf.mldv1_unsolicited_report_interval,
5504 .maxlen = sizeof(int),
5505 .mode = 0644,
5506 .proc_handler = proc_dointvec_ms_jiffies,
5507 },
5508 {
5509 .procname = "mldv2_unsolicited_report_interval",
5510 .data =
5511 &ipv6_devconf.mldv2_unsolicited_report_interval,
5512 .maxlen = sizeof(int),
5513 .mode = 0644,
5514 .proc_handler = proc_dointvec_ms_jiffies,
5515 },
Linus Torvalds1da177e2005-04-16 15:20:36 -07005516 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005517 .procname = "use_tempaddr",
5518 .data = &ipv6_devconf.use_tempaddr,
5519 .maxlen = sizeof(int),
5520 .mode = 0644,
5521 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005522 },
5523 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005524 .procname = "temp_valid_lft",
5525 .data = &ipv6_devconf.temp_valid_lft,
5526 .maxlen = sizeof(int),
5527 .mode = 0644,
5528 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005529 },
5530 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005531 .procname = "temp_prefered_lft",
5532 .data = &ipv6_devconf.temp_prefered_lft,
5533 .maxlen = sizeof(int),
5534 .mode = 0644,
5535 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005536 },
5537 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005538 .procname = "regen_max_retry",
5539 .data = &ipv6_devconf.regen_max_retry,
5540 .maxlen = sizeof(int),
5541 .mode = 0644,
5542 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005543 },
5544 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005545 .procname = "max_desync_factor",
5546 .data = &ipv6_devconf.max_desync_factor,
5547 .maxlen = sizeof(int),
5548 .mode = 0644,
5549 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005550 },
Linus Torvalds1da177e2005-04-16 15:20:36 -07005551 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005552 .procname = "max_addresses",
5553 .data = &ipv6_devconf.max_addresses,
5554 .maxlen = sizeof(int),
5555 .mode = 0644,
5556 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005557 },
5558 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005559 .procname = "accept_ra_defrtr",
5560 .data = &ipv6_devconf.accept_ra_defrtr,
5561 .maxlen = sizeof(int),
5562 .mode = 0644,
5563 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -08005564 },
5565 {
Hangbin Liu8013d1d2015-07-30 14:28:42 +08005566 .procname = "accept_ra_min_hop_limit",
5567 .data = &ipv6_devconf.accept_ra_min_hop_limit,
5568 .maxlen = sizeof(int),
5569 .mode = 0644,
5570 .proc_handler = proc_dointvec,
5571 },
5572 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005573 .procname = "accept_ra_pinfo",
5574 .data = &ipv6_devconf.accept_ra_pinfo,
5575 .maxlen = sizeof(int),
5576 .mode = 0644,
5577 .proc_handler = proc_dointvec,
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -08005578 },
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08005579#ifdef CONFIG_IPV6_ROUTER_PREF
5580 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005581 .procname = "accept_ra_rtr_pref",
5582 .data = &ipv6_devconf.accept_ra_rtr_pref,
5583 .maxlen = sizeof(int),
5584 .mode = 0644,
5585 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08005586 },
YOSHIFUJI Hideaki52e163562006-03-20 17:05:47 -08005587 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005588 .procname = "router_probe_interval",
5589 .data = &ipv6_devconf.rtr_probe_interval,
5590 .maxlen = sizeof(int),
5591 .mode = 0644,
5592 .proc_handler = proc_dointvec_jiffies,
YOSHIFUJI Hideaki52e163562006-03-20 17:05:47 -08005593 },
Neil Hormanfa03ef32007-01-30 14:30:10 -08005594#ifdef CONFIG_IPV6_ROUTE_INFO
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -08005595 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005596 .procname = "accept_ra_rt_info_max_plen",
5597 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
5598 .maxlen = sizeof(int),
5599 .mode = 0644,
5600 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -08005601 },
5602#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08005603#endif
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -08005604 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005605 .procname = "proxy_ndp",
5606 .data = &ipv6_devconf.proxy_ndp,
5607 .maxlen = sizeof(int),
5608 .mode = 0644,
stephen hemmingerc92d5492013-12-17 22:37:14 -08005609 .proc_handler = addrconf_sysctl_proxy_ndp,
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -07005610 },
5611 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005612 .procname = "accept_source_route",
5613 .data = &ipv6_devconf.accept_source_route,
5614 .maxlen = sizeof(int),
5615 .mode = 0644,
5616 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -07005617 },
Neil Horman95c385b2007-04-25 17:08:10 -07005618#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
5619 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005620 .procname = "optimistic_dad",
5621 .data = &ipv6_devconf.optimistic_dad,
5622 .maxlen = sizeof(int),
5623 .mode = 0644,
5624 .proc_handler = proc_dointvec,
Neil Horman95c385b2007-04-25 17:08:10 -07005625
5626 },
Erik Kline7fd25612014-10-28 18:11:14 +09005627 {
5628 .procname = "use_optimistic",
5629 .data = &ipv6_devconf.use_optimistic,
5630 .maxlen = sizeof(int),
5631 .mode = 0644,
5632 .proc_handler = proc_dointvec,
5633
5634 },
Neil Horman95c385b2007-04-25 17:08:10 -07005635#endif
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09005636#ifdef CONFIG_IPV6_MROUTE
5637 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005638 .procname = "mc_forwarding",
5639 .data = &ipv6_devconf.mc_forwarding,
5640 .maxlen = sizeof(int),
5641 .mode = 0444,
5642 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09005643 },
5644#endif
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -07005645 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005646 .procname = "disable_ipv6",
5647 .data = &ipv6_devconf.disable_ipv6,
5648 .maxlen = sizeof(int),
5649 .mode = 0644,
5650 .proc_handler = addrconf_sysctl_disable,
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +09005651 },
5652 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005653 .procname = "accept_dad",
5654 .data = &ipv6_devconf.accept_dad,
5655 .maxlen = sizeof(int),
5656 .mode = 0644,
5657 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09005658 },
5659 {
Octavian Purdilaf7734fd2009-10-02 11:39:15 +00005660 .procname = "force_tllao",
5661 .data = &ipv6_devconf.force_tllao,
5662 .maxlen = sizeof(int),
5663 .mode = 0644,
5664 .proc_handler = proc_dointvec
5665 },
5666 {
Hannes Frederic Sowa5cb04432012-11-06 16:46:20 +00005667 .procname = "ndisc_notify",
5668 .data = &ipv6_devconf.ndisc_notify,
5669 .maxlen = sizeof(int),
5670 .mode = 0644,
5671 .proc_handler = proc_dointvec
5672 },
5673 {
Hannes Frederic Sowab800c3b2013-08-27 01:36:51 +02005674 .procname = "suppress_frag_ndisc",
5675 .data = &ipv6_devconf.suppress_frag_ndisc,
5676 .maxlen = sizeof(int),
5677 .mode = 0644,
5678 .proc_handler = proc_dointvec
5679 },
5680 {
Ben Greeard9333192014-06-25 14:44:53 -07005681 .procname = "accept_ra_from_local",
5682 .data = &ipv6_devconf.accept_ra_from_local,
5683 .maxlen = sizeof(int),
5684 .mode = 0644,
5685 .proc_handler = proc_dointvec,
5686 },
5687 {
Harout Hedeshianc2943f12015-01-20 10:06:05 -07005688 .procname = "accept_ra_mtu",
5689 .data = &ipv6_devconf.accept_ra_mtu,
5690 .maxlen = sizeof(int),
5691 .mode = 0644,
5692 .proc_handler = proc_dointvec,
5693 },
5694 {
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +01005695 .procname = "stable_secret",
5696 .data = &ipv6_devconf.stable_secret,
5697 .maxlen = IPV6_MAX_STRLEN,
5698 .mode = 0600,
5699 .proc_handler = addrconf_sysctl_stable_secret,
5700 },
5701 {
Erik Kline3985e8a2015-07-22 16:38:25 +09005702 .procname = "use_oif_addrs_only",
5703 .data = &ipv6_devconf.use_oif_addrs_only,
5704 .maxlen = sizeof(int),
5705 .mode = 0644,
5706 .proc_handler = proc_dointvec,
Andy Gospodarek35103d12015-08-13 10:39:01 -04005707 },
5708 {
5709 .procname = "ignore_routes_with_linkdown",
5710 .data = &ipv6_devconf.ignore_routes_with_linkdown,
5711 .maxlen = sizeof(int),
5712 .mode = 0644,
5713 .proc_handler = addrconf_sysctl_ignore_routes_with_linkdown,
Erik Kline3985e8a2015-07-22 16:38:25 +09005714 },
5715 {
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08005716 /* sentinel */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005717 }
5718 },
Linus Torvalds1da177e2005-04-16 15:20:36 -07005719};
5720
Pavel Emelyanovbff16c22008-01-10 17:42:13 -08005721static int __addrconf_sysctl_register(struct net *net, char *dev_name,
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08005722 struct inet6_dev *idev, struct ipv6_devconf *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005723{
5724 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005725 struct addrconf_sysctl_table *t;
Eric W. Biederman6105e292012-04-19 13:41:24 +00005726 char path[sizeof("net/ipv6/conf/") + IFNAMSIZ];
Pavel Emelyanov1dab6222007-12-02 00:59:38 +11005727
Arnaldo Carvalho de Meloaf879cc2006-11-17 12:14:37 -02005728 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
Ian Morris63159f22015-03-29 14:00:04 +01005729 if (!t)
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11005730 goto out;
5731
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07005732 for (i = 0; t->addrconf_vars[i].data; i++) {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005733 t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005734 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
Pavel Emelyanovbff16c22008-01-10 17:42:13 -08005735 t->addrconf_vars[i].extra2 = net;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005736 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005737
Eric W. Biederman6105e292012-04-19 13:41:24 +00005738 snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005739
Eric W. Biederman6105e292012-04-19 13:41:24 +00005740 t->sysctl_header = register_net_sysctl(net, path, t->addrconf_vars);
Ian Morris63159f22015-03-29 14:00:04 +01005741 if (!t->sysctl_header)
Eric W. Biederman6105e292012-04-19 13:41:24 +00005742 goto free;
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11005743
5744 p->sysctl = t;
Pavel Emelyanov95897312008-01-10 17:41:45 -08005745 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005746
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11005747free:
Linus Torvalds1da177e2005-04-16 15:20:36 -07005748 kfree(t);
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11005749out:
Pavel Emelyanov95897312008-01-10 17:41:45 -08005750 return -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005751}
5752
Pavel Emelyanov408c4762008-01-10 17:41:21 -08005753static void __addrconf_sysctl_unregister(struct ipv6_devconf *p)
5754{
5755 struct addrconf_sysctl_table *t;
5756
Ian Morris63159f22015-03-29 14:00:04 +01005757 if (!p->sysctl)
Pavel Emelyanov408c4762008-01-10 17:41:21 -08005758 return;
5759
5760 t = p->sysctl;
5761 p->sysctl = NULL;
Lucian Adrian Grijincuff538812011-05-01 01:44:01 +00005762 unregister_net_sysctl_table(t->sysctl_header);
Pavel Emelyanov408c4762008-01-10 17:41:21 -08005763 kfree(t);
5764}
5765
WANG Conga317a2f2014-07-25 15:25:09 -07005766static int addrconf_sysctl_register(struct inet6_dev *idev)
Pavel Emelyanovf52295a2007-12-02 00:58:37 +11005767{
WANG Conga317a2f2014-07-25 15:25:09 -07005768 int err;
5769
5770 if (!sysctl_dev_name_is_allowed(idev->dev->name))
5771 return -EINVAL;
5772
5773 err = neigh_sysctl_register(idev->dev, idev->nd_parms,
5774 &ndisc_ifinfo_sysctl_change);
5775 if (err)
5776 return err;
5777 err = __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name,
5778 idev, &idev->cnf);
5779 if (err)
5780 neigh_sysctl_unregister(idev->nd_parms);
5781
5782 return err;
Pavel Emelyanovf52295a2007-12-02 00:58:37 +11005783}
5784
Pavel Emelyanov408c4762008-01-10 17:41:21 -08005785static void addrconf_sysctl_unregister(struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005786{
Pavel Emelyanov408c4762008-01-10 17:41:21 -08005787 __addrconf_sysctl_unregister(&idev->cnf);
5788 neigh_sysctl_unregister(idev->nd_parms);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005789}
5790
5791
5792#endif
5793
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00005794static int __net_init addrconf_init_net(struct net *net)
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005795{
Hong Zhiguoa79ca222013-03-26 01:52:45 +08005796 int err = -ENOMEM;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005797 struct ipv6_devconf *all, *dflt;
5798
Hong Zhiguoa79ca222013-03-26 01:52:45 +08005799 all = kmemdup(&ipv6_devconf, sizeof(ipv6_devconf), GFP_KERNEL);
Ian Morris63159f22015-03-29 14:00:04 +01005800 if (!all)
Hong Zhiguoa79ca222013-03-26 01:52:45 +08005801 goto err_alloc_all;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005802
Hong Zhiguoa79ca222013-03-26 01:52:45 +08005803 dflt = kmemdup(&ipv6_devconf_dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL);
Ian Morris63159f22015-03-29 14:00:04 +01005804 if (!dflt)
Hong Zhiguoa79ca222013-03-26 01:52:45 +08005805 goto err_alloc_dflt;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005806
Hong Zhiguoa79ca222013-03-26 01:52:45 +08005807 /* these will be inherited by all namespaces */
5808 dflt->autoconf = ipv6_defaults.autoconf;
5809 dflt->disable_ipv6 = ipv6_defaults.disable_ipv6;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005810
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +01005811 dflt->stable_secret.initialized = false;
5812 all->stable_secret.initialized = false;
5813
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005814 net->ipv6.devconf_all = all;
5815 net->ipv6.devconf_dflt = dflt;
5816
5817#ifdef CONFIG_SYSCTL
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08005818 err = __addrconf_sysctl_register(net, "all", NULL, all);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005819 if (err < 0)
5820 goto err_reg_all;
5821
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08005822 err = __addrconf_sysctl_register(net, "default", NULL, dflt);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005823 if (err < 0)
5824 goto err_reg_dflt;
5825#endif
5826 return 0;
5827
5828#ifdef CONFIG_SYSCTL
5829err_reg_dflt:
5830 __addrconf_sysctl_unregister(all);
5831err_reg_all:
5832 kfree(dflt);
5833#endif
5834err_alloc_dflt:
5835 kfree(all);
5836err_alloc_all:
5837 return err;
5838}
5839
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00005840static void __net_exit addrconf_exit_net(struct net *net)
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005841{
5842#ifdef CONFIG_SYSCTL
5843 __addrconf_sysctl_unregister(net->ipv6.devconf_dflt);
5844 __addrconf_sysctl_unregister(net->ipv6.devconf_all);
5845#endif
zhuyj73cf0e92014-11-26 10:25:58 +08005846 kfree(net->ipv6.devconf_dflt);
5847 kfree(net->ipv6.devconf_all);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005848}
5849
5850static struct pernet_operations addrconf_ops = {
5851 .init = addrconf_init_net,
5852 .exit = addrconf_exit_net,
5853};
5854
Daniel Borkmann207895f2015-01-29 12:15:03 +01005855static struct rtnl_af_ops inet6_ops __read_mostly = {
Thomas Grafb382b192010-11-16 04:33:57 +00005856 .family = AF_INET6,
5857 .fill_link_af = inet6_fill_link_af,
5858 .get_link_af_size = inet6_get_link_af_size,
Daniel Borkmann11b1f822015-02-05 14:39:11 +01005859 .validate_link_af = inet6_validate_link_af,
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005860 .set_link_af = inet6_set_link_af,
Thomas Grafb382b192010-11-16 04:33:57 +00005861};
5862
Linus Torvalds1da177e2005-04-16 15:20:36 -07005863/*
5864 * Init / cleanup code
5865 */
5866
5867int __init addrconf_init(void)
5868{
WANG Conga317a2f2014-07-25 15:25:09 -07005869 struct inet6_dev *idev;
stephen hemmingerc2e21292010-03-17 20:31:10 +00005870 int i, err;
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +09005871
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005872 err = ipv6_addr_label_init();
5873 if (err < 0) {
Joe Perchesf3213832012-05-15 14:11:53 +00005874 pr_crit("%s: cannot initialize default policy table: %d\n",
5875 __func__, err);
Neil Horman2cc6d2b2010-09-24 09:55:52 +00005876 goto out;
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +09005877 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005878
Neil Horman2cc6d2b2010-09-24 09:55:52 +00005879 err = register_pernet_subsys(&addrconf_ops);
5880 if (err < 0)
5881 goto out_addrlabel;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005882
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01005883 addrconf_wq = create_workqueue("ipv6_addrconf");
5884 if (!addrconf_wq) {
5885 err = -ENOMEM;
5886 goto out_nowq;
5887 }
5888
Linus Torvalds1da177e2005-04-16 15:20:36 -07005889 /* The addrconf netdev notifier requires that loopback_dev
5890 * has it's ipv6 private information allocated and setup
5891 * before it can bring up and give link-local addresses
5892 * to other devices which are up.
5893 *
5894 * Unfortunately, loopback_dev is not necessarily the first
5895 * entry in the global dev_base list of net devices. In fact,
5896 * it is likely to be the very last entry on that list.
5897 * So this causes the notifier registry below to try and
5898 * give link-local addresses to all devices besides loopback_dev
5899 * first, then loopback_dev, which cases all the non-loopback_dev
5900 * devices to fail to get a link-local address.
5901 *
5902 * So, as a temporary fix, allocate the ipv6 structure for
5903 * loopback_dev first by hand.
5904 * Longer term, all of the dependencies ipv6 has upon the loopback
5905 * device and it being up should be removed.
5906 */
5907 rtnl_lock();
WANG Conga317a2f2014-07-25 15:25:09 -07005908 idev = ipv6_add_dev(init_net.loopback_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005909 rtnl_unlock();
WANG Conga317a2f2014-07-25 15:25:09 -07005910 if (IS_ERR(idev)) {
5911 err = PTR_ERR(idev);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005912 goto errlo;
WANG Conga317a2f2014-07-25 15:25:09 -07005913 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005914
stephen hemmingerc2e21292010-03-17 20:31:10 +00005915 for (i = 0; i < IN6_ADDR_HSIZE; i++)
5916 INIT_HLIST_HEAD(&inet6_addr_lst[i]);
5917
Linus Torvalds1da177e2005-04-16 15:20:36 -07005918 register_netdevice_notifier(&ipv6_dev_notf);
5919
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01005920 addrconf_verify();
Thomas Grafc127ea22007-03-22 11:58:32 -07005921
stephen hemminger3678a9d2013-12-30 10:41:32 -08005922 rtnl_af_register(&inet6_ops);
Thomas Grafb382b192010-11-16 04:33:57 +00005923
Greg Rosec7ac8672011-06-10 01:27:09 +00005924 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo,
5925 NULL);
Thomas Grafc127ea22007-03-22 11:58:32 -07005926 if (err < 0)
5927 goto errout;
5928
5929 /* Only the first call to __rtnl_register can fail */
Greg Rosec7ac8672011-06-10 01:27:09 +00005930 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL);
5931 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL);
5932 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr,
5933 inet6_dump_ifaddr, NULL);
5934 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL,
5935 inet6_dump_ifmcaddr, NULL);
5936 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL,
5937 inet6_dump_ifacaddr, NULL);
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +00005938 __rtnl_register(PF_INET6, RTM_GETNETCONF, inet6_netconf_get_devconf,
Nicolas Dichtel7a674202013-03-05 23:42:06 +00005939 inet6_netconf_dump_devconf, NULL);
Thomas Grafc127ea22007-03-22 11:58:32 -07005940
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +09005941 ipv6_addr_label_rtnl_register();
5942
Linus Torvalds1da177e2005-04-16 15:20:36 -07005943 return 0;
Thomas Grafc127ea22007-03-22 11:58:32 -07005944errout:
Thomas Grafb382b192010-11-16 04:33:57 +00005945 rtnl_af_unregister(&inet6_ops);
Thomas Grafc127ea22007-03-22 11:58:32 -07005946 unregister_netdevice_notifier(&ipv6_dev_notf);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005947errlo:
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01005948 destroy_workqueue(addrconf_wq);
5949out_nowq:
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005950 unregister_pernet_subsys(&addrconf_ops);
Neil Horman2cc6d2b2010-09-24 09:55:52 +00005951out_addrlabel:
5952 ipv6_addr_label_cleanup();
5953out:
Thomas Grafc127ea22007-03-22 11:58:32 -07005954 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005955}
5956
Daniel Lezcano09f77092007-12-13 05:34:58 -08005957void addrconf_cleanup(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005958{
Daniel Lezcano176c39a2009-03-03 01:06:45 -08005959 struct net_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005960 int i;
5961
5962 unregister_netdevice_notifier(&ipv6_dev_notf);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08005963 unregister_pernet_subsys(&addrconf_ops);
Neil Horman2cc6d2b2010-09-24 09:55:52 +00005964 ipv6_addr_label_cleanup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07005965
5966 rtnl_lock();
5967
Thomas Grafb382b192010-11-16 04:33:57 +00005968 __rtnl_af_unregister(&inet6_ops);
5969
Daniel Lezcano176c39a2009-03-03 01:06:45 -08005970 /* clean dev list */
5971 for_each_netdev(&init_net, dev) {
5972 if (__in6_dev_get(dev) == NULL)
5973 continue;
5974 addrconf_ifdown(dev, 1);
5975 }
5976 addrconf_ifdown(init_net.loopback_dev, 2);
5977
Linus Torvalds1da177e2005-04-16 15:20:36 -07005978 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07005979 * Check hash table.
5980 */
stephen hemminger5c578aed2010-03-17 20:31:11 +00005981 spin_lock_bh(&addrconf_hash_lock);
stephen hemmingerc2e21292010-03-17 20:31:10 +00005982 for (i = 0; i < IN6_ADDR_HSIZE; i++)
5983 WARN_ON(!hlist_empty(&inet6_addr_lst[i]));
stephen hemminger5c578aed2010-03-17 20:31:11 +00005984 spin_unlock_bh(&addrconf_hash_lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01005985 cancel_delayed_work(&addr_chk_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005986 rtnl_unlock();
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01005987
5988 destroy_workqueue(addrconf_wq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005989}