blob: df8425fcbc2cab843c9af24272d45fc95d4040b7 [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
Alexander Aring5241c2d2015-12-14 20:55:22 +010073#include <net/6lowpan.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>
David Ahernca254492015-10-12 11:47:10 -070084#include <net/l3mdev.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070085#include <linux/if_tunnel.h>
86#include <linux/rtnetlink.h>
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +000087#include <linux/netconf.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070088#include <linux/random.h>
Stephen Hemmingere21e8462010-03-20 16:09:01 -070089#include <linux/uaccess.h>
Herbert Xu7f7d9a62007-04-24 21:54:09 -070090#include <asm/unaligned.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
92#include <linux/proc_fs.h>
93#include <linux/seq_file.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040094#include <linux/export.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070095
96/* Set to 3 to get tracing... */
97#define ACONF_DEBUG 2
98
99#if ACONF_DEBUG >= 3
dingtianhongba3542e2013-08-17 10:27:04 +0800100#define ADBG(fmt, ...) printk(fmt, ##__VA_ARGS__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101#else
dingtianhongba3542e2013-08-17 10:27:04 +0800102#define ADBG(fmt, ...) do { if (0) printk(fmt, ##__VA_ARGS__); } while (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103#endif
104
105#define INFINITY_LIFE_TIME 0xFFFFFFFF
Thomas Graf18a31e12010-11-17 04:12:02 +0000106
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +0100107#define IPV6_MAX_STRLEN \
108 sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255")
109
Thomas Graf18a31e12010-11-17 04:12:02 +0000110static inline u32 cstamp_delta(unsigned long cstamp)
111{
112 return (cstamp - INITIAL_JIFFIES) * 100UL / HZ;
113}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114
115#ifdef CONFIG_SYSCTL
WANG Conga317a2f2014-07-25 15:25:09 -0700116static int addrconf_sysctl_register(struct inet6_dev *idev);
Pavel Emelyanov408c4762008-01-10 17:41:21 -0800117static void addrconf_sysctl_unregister(struct inet6_dev *idev);
118#else
WANG Conga317a2f2014-07-25 15:25:09 -0700119static inline int addrconf_sysctl_register(struct inet6_dev *idev)
Pavel Emelyanov408c4762008-01-10 17:41:21 -0800120{
WANG Conga317a2f2014-07-25 15:25:09 -0700121 return 0;
Pavel Emelyanov408c4762008-01-10 17:41:21 -0800122}
123
124static inline void addrconf_sysctl_unregister(struct inet6_dev *idev)
125{
126}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127#endif
128
Sorin Dumitrueb7e0572012-08-30 02:01:45 +0000129static void __ipv6_regen_rndid(struct inet6_dev *idev);
130static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131static void ipv6_regen_rndid(unsigned long data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900133static int ipv6_generate_eui64(u8 *eui, struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134static int ipv6_count_addresses(struct inet6_dev *idev);
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +0100135static int ipv6_generate_stable_address(struct in6_addr *addr,
136 u8 dad_count,
137 const struct inet6_dev *idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138
139/*
140 * Configured unicast address hash table
141 */
stephen hemmingerc2e21292010-03-17 20:31:10 +0000142static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE];
stephen hemminger5c578aed2010-03-17 20:31:11 +0000143static DEFINE_SPINLOCK(addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +0100145static void addrconf_verify(void);
146static void addrconf_verify_rtnl(void);
147static void addrconf_verify_work(struct work_struct *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +0100149static struct workqueue_struct *addrconf_wq;
150static DECLARE_DELAYED_WORK(addr_chk_work, addrconf_verify_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151
152static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
153static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
154
Jiri Pirko93d9b7d2010-03-10 10:28:56 +0000155static void addrconf_type_change(struct net_device *dev,
156 unsigned long event);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157static int addrconf_ifdown(struct net_device *dev, int how);
158
Romain Kuntz21caa662013-01-09 21:06:03 +0000159static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx,
160 int plen,
161 const struct net_device *dev,
162 u32 flags, u32 noflags);
163
David S. Millercf22f9a2012-04-14 21:37:40 -0400164static void addrconf_dad_start(struct inet6_ifaddr *ifp);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +0100165static void addrconf_dad_work(struct work_struct *w);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +0900167static void addrconf_dad_run(struct inet6_dev *idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168static void addrconf_rs_timer(unsigned long data);
169static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
170static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
171
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900172static void inet6_prefix_notify(int event, struct inet6_dev *idev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 struct prefix_info *pinfo);
David S. Miller3e81c6d2010-03-20 16:18:00 -0700174static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
175 struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176
Adrian Bunk888c8482008-07-22 14:21:58 -0700177static struct ipv6_devconf ipv6_devconf __read_mostly = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 .forwarding = 0,
179 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
180 .mtu6 = IPV6_MIN_MTU,
181 .accept_ra = 1,
182 .accept_redirects = 1,
183 .autoconf = 1,
184 .force_mld_version = 0,
Hannes Frederic Sowafc4eba52013-08-14 01:03:46 +0200185 .mldv1_unsolicited_report_interval = 10 * HZ,
186 .mldv2_unsolicited_report_interval = HZ,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 .dad_transmits = 1,
188 .rtr_solicits = MAX_RTR_SOLICITATIONS,
189 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
190 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
Ian Morris67ba4152014-08-24 21:53:10 +0100191 .use_tempaddr = 0,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 .temp_valid_lft = TEMP_VALID_LIFETIME,
193 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
194 .regen_max_retry = REGEN_MAX_RETRY,
195 .max_desync_factor = MAX_DESYNC_FACTOR,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 .max_addresses = IPV6_MAX_ADDRESSES,
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -0800197 .accept_ra_defrtr = 1,
Ben Greeard9333192014-06-25 14:44:53 -0700198 .accept_ra_from_local = 0,
Hangbin Liu8013d1d2015-07-30 14:28:42 +0800199 .accept_ra_min_hop_limit= 1,
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -0800200 .accept_ra_pinfo = 1,
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800201#ifdef CONFIG_IPV6_ROUTER_PREF
202 .accept_ra_rtr_pref = 1,
YOSHIFUJI Hideaki52e163562006-03-20 17:05:47 -0800203 .rtr_probe_interval = 60 * HZ,
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -0800204#ifdef CONFIG_IPV6_ROUTE_INFO
205 .accept_ra_rt_info_max_plen = 0,
206#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800207#endif
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -0700208 .proxy_ndp = 0,
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -0700209 .accept_source_route = 0, /* we do not accept RH0 by default. */
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +0900210 .disable_ipv6 = 0,
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900211 .accept_dad = 1,
Hannes Frederic Sowab800c3b2013-08-27 01:36:51 +0200212 .suppress_frag_ndisc = 1,
Harout Hedeshianc2943f12015-01-20 10:06:05 -0700213 .accept_ra_mtu = 1,
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +0100214 .stable_secret = {
215 .initialized = false,
Erik Kline3985e8a2015-07-22 16:38:25 +0900216 },
217 .use_oif_addrs_only = 0,
Andy Gospodarek35103d12015-08-13 10:39:01 -0400218 .ignore_routes_with_linkdown = 0,
David Ahernf1705ec2016-02-24 09:25:37 -0800219 .keep_addr_on_down = 0,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220};
221
Brian Haleyab32ea52006-09-22 14:15:41 -0700222static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 .forwarding = 0,
224 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
225 .mtu6 = IPV6_MIN_MTU,
226 .accept_ra = 1,
227 .accept_redirects = 1,
228 .autoconf = 1,
Hannes Frederic Sowafc4eba52013-08-14 01:03:46 +0200229 .force_mld_version = 0,
230 .mldv1_unsolicited_report_interval = 10 * HZ,
231 .mldv2_unsolicited_report_interval = HZ,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 .dad_transmits = 1,
233 .rtr_solicits = MAX_RTR_SOLICITATIONS,
234 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
235 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 .use_tempaddr = 0,
237 .temp_valid_lft = TEMP_VALID_LIFETIME,
238 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
239 .regen_max_retry = REGEN_MAX_RETRY,
240 .max_desync_factor = MAX_DESYNC_FACTOR,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 .max_addresses = IPV6_MAX_ADDRESSES,
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -0800242 .accept_ra_defrtr = 1,
Ben Greeard9333192014-06-25 14:44:53 -0700243 .accept_ra_from_local = 0,
Hangbin Liu8013d1d2015-07-30 14:28:42 +0800244 .accept_ra_min_hop_limit= 1,
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -0800245 .accept_ra_pinfo = 1,
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800246#ifdef CONFIG_IPV6_ROUTER_PREF
247 .accept_ra_rtr_pref = 1,
YOSHIFUJI Hideaki52e163562006-03-20 17:05:47 -0800248 .rtr_probe_interval = 60 * HZ,
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -0800249#ifdef CONFIG_IPV6_ROUTE_INFO
250 .accept_ra_rt_info_max_plen = 0,
251#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800252#endif
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -0700253 .proxy_ndp = 0,
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -0700254 .accept_source_route = 0, /* we do not accept RH0 by default. */
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +0900255 .disable_ipv6 = 0,
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900256 .accept_dad = 1,
Hannes Frederic Sowab800c3b2013-08-27 01:36:51 +0200257 .suppress_frag_ndisc = 1,
Harout Hedeshianc2943f12015-01-20 10:06:05 -0700258 .accept_ra_mtu = 1,
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +0100259 .stable_secret = {
260 .initialized = false,
261 },
Erik Kline3985e8a2015-07-22 16:38:25 +0900262 .use_oif_addrs_only = 0,
Andy Gospodarek35103d12015-08-13 10:39:01 -0400263 .ignore_routes_with_linkdown = 0,
David Ahernf1705ec2016-02-24 09:25:37 -0800264 .keep_addr_on_down = 0,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265};
266
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -0700267/* Check if a valid qdisc is available */
David S. Miller05297942008-07-08 23:01:27 -0700268static inline bool addrconf_qdisc_ok(const struct net_device *dev)
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -0700269{
David S. Miller05297942008-07-08 23:01:27 -0700270 return !qdisc_tx_is_noop(dev);
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -0700271}
272
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200273static void addrconf_del_rs_timer(struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274{
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200275 if (del_timer(&idev->rs_timer))
276 __in6_dev_put(idev);
277}
278
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +0100279static void addrconf_del_dad_work(struct inet6_ifaddr *ifp)
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200280{
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +0100281 if (cancel_delayed_work(&ifp->dad_work))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 __in6_ifa_put(ifp);
283}
284
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200285static void addrconf_mod_rs_timer(struct inet6_dev *idev,
286 unsigned long when)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287{
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200288 if (!timer_pending(&idev->rs_timer))
289 in6_dev_hold(idev);
290 mod_timer(&idev->rs_timer, jiffies + when);
291}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +0100293static void addrconf_mod_dad_work(struct inet6_ifaddr *ifp,
294 unsigned long delay)
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200295{
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +0100296 if (!delayed_work_pending(&ifp->dad_work))
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200297 in6_ifa_hold(ifp);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +0100298 mod_delayed_work(addrconf_wq, &ifp->dad_work, delay);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299}
300
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700301static int snmp6_alloc_dev(struct inet6_dev *idev)
302{
John Stultz827da442013-10-07 15:51:58 -0700303 int i;
304
WANG Cong698365f2014-05-05 15:55:55 -0700305 idev->stats.ipv6 = alloc_percpu(struct ipstats_mib);
306 if (!idev->stats.ipv6)
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700307 goto err_ip;
John Stultz827da442013-10-07 15:51:58 -0700308
309 for_each_possible_cpu(i) {
310 struct ipstats_mib *addrconf_stats;
WANG Cong698365f2014-05-05 15:55:55 -0700311 addrconf_stats = per_cpu_ptr(idev->stats.ipv6, i);
John Stultz827da442013-10-07 15:51:58 -0700312 u64_stats_init(&addrconf_stats->syncp);
John Stultz827da442013-10-07 15:51:58 -0700313 }
314
315
Eric Dumazetbe281e52011-05-19 01:14:23 +0000316 idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device),
317 GFP_KERNEL);
318 if (!idev->stats.icmpv6dev)
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700319 goto err_icmp;
Eric Dumazetbe281e52011-05-19 01:14:23 +0000320 idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device),
321 GFP_KERNEL);
322 if (!idev->stats.icmpv6msgdev)
David L Stevens14878f72007-09-16 16:52:35 -0700323 goto err_icmpmsg;
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700324
325 return 0;
326
David L Stevens14878f72007-09-16 16:52:35 -0700327err_icmpmsg:
Eric Dumazetbe281e52011-05-19 01:14:23 +0000328 kfree(idev->stats.icmpv6dev);
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700329err_icmp:
WANG Cong698365f2014-05-05 15:55:55 -0700330 free_percpu(idev->stats.ipv6);
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700331err_ip:
Pavel Emelyanovaaf70ec2007-10-17 21:25:32 -0700332 return -ENOMEM;
Herbert Xu7f7d9a62007-04-24 21:54:09 -0700333}
334
Eldad Zack8e5e8f32012-04-01 07:49:08 +0000335static struct inet6_dev *ipv6_add_dev(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336{
337 struct inet6_dev *ndev;
WANG Conga317a2f2014-07-25 15:25:09 -0700338 int err = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
340 ASSERT_RTNL();
341
342 if (dev->mtu < IPV6_MIN_MTU)
WANG Conga317a2f2014-07-25 15:25:09 -0700343 return ERR_PTR(-EINVAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900345 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
Ian Morris63159f22015-03-29 14:00:04 +0100346 if (!ndev)
WANG Conga317a2f2014-07-25 15:25:09 -0700347 return ERR_PTR(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348
Ingo Oeser322f74a2006-03-20 23:01:47 -0800349 rwlock_init(&ndev->lock);
350 ndev->dev = dev;
stephen hemminger502a2ff2010-03-17 20:31:13 +0000351 INIT_LIST_HEAD(&ndev->addr_list);
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200352 setup_timer(&ndev->rs_timer, addrconf_rs_timer,
353 (unsigned long)ndev);
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900354 memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf));
Hannes Frederic Sowa9b29c692015-12-15 22:59:12 +0100355
356 if (ndev->cnf.stable_secret.initialized)
357 ndev->addr_gen_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
358 else
359 ndev->addr_gen_mode = IN6_ADDR_GEN_MODE_EUI64;
360
Ingo Oeser322f74a2006-03-20 23:01:47 -0800361 ndev->cnf.mtu6 = dev->mtu;
Ingo Oeser322f74a2006-03-20 23:01:47 -0800362 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
Ian Morris63159f22015-03-29 14:00:04 +0100363 if (!ndev->nd_parms) {
Ingo Oeser322f74a2006-03-20 23:01:47 -0800364 kfree(ndev);
WANG Conga317a2f2014-07-25 15:25:09 -0700365 return ERR_PTR(err);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800366 }
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700367 if (ndev->cnf.forwarding)
368 dev_disable_lro(dev);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800369 /* We refer to the device */
370 dev_hold(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371
Ingo Oeser322f74a2006-03-20 23:01:47 -0800372 if (snmp6_alloc_dev(ndev) < 0) {
dingtianhongba3542e2013-08-17 10:27:04 +0800373 ADBG(KERN_WARNING
Joe Perchesf3213832012-05-15 14:11:53 +0000374 "%s: cannot allocate memory for statistics; dev=%s.\n",
dingtianhongba3542e2013-08-17 10:27:04 +0800375 __func__, dev->name);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800376 neigh_parms_release(&nd_tbl, ndev->nd_parms);
Roy Li8603e332011-09-20 15:10:16 -0400377 dev_put(dev);
378 kfree(ndev);
WANG Conga317a2f2014-07-25 15:25:09 -0700379 return ERR_PTR(err);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800380 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381
Ingo Oeser322f74a2006-03-20 23:01:47 -0800382 if (snmp6_register_dev(ndev) < 0) {
dingtianhongba3542e2013-08-17 10:27:04 +0800383 ADBG(KERN_WARNING
Joe Perchesf3213832012-05-15 14:11:53 +0000384 "%s: cannot create /proc/net/dev_snmp6/%s\n",
dingtianhongba3542e2013-08-17 10:27:04 +0800385 __func__, dev->name);
WANG Conga317a2f2014-07-25 15:25:09 -0700386 goto err_release;
Ingo Oeser322f74a2006-03-20 23:01:47 -0800387 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388
Ingo Oeser322f74a2006-03-20 23:01:47 -0800389 /* One reference from device. We must do this before
390 * we invoke __ipv6_regen_rndid().
391 */
392 in6_dev_hold(ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900394 if (dev->flags & (IFF_NOARP | IFF_LOOPBACK))
395 ndev->cnf.accept_dad = -1;
396
Amerigo Wang07a93622012-10-29 16:23:10 +0000397#if IS_ENABLED(CONFIG_IPV6_SIT)
YOSHIFUJI Hideakib077d7a2008-04-13 23:42:18 -0700398 if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) {
Joe Perchesf3213832012-05-15 14:11:53 +0000399 pr_info("%s: Disabled Multicast RS\n", dev->name);
YOSHIFUJI Hideakib077d7a2008-04-13 23:42:18 -0700400 ndev->cnf.rtr_solicits = 0;
401 }
402#endif
403
stephen hemminger372e6c82010-03-17 20:31:09 +0000404 INIT_LIST_HEAD(&ndev->tempaddr_list);
Pavel Emelyanovb24b8a22008-01-23 21:20:07 -0800405 setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800406 if ((dev->flags&IFF_LOOPBACK) ||
407 dev->type == ARPHRD_TUNNEL ||
YOSHIFUJI Hideaki9625ed72008-04-13 23:47:11 -0700408 dev->type == ARPHRD_TUNNEL6 ||
Joerg Roedel0be669b2006-10-10 14:49:53 -0700409 dev->type == ARPHRD_SIT ||
Joerg Roedel0be669b2006-10-10 14:49:53 -0700410 dev->type == ARPHRD_NONE) {
Ingo Oeser322f74a2006-03-20 23:01:47 -0800411 ndev->cnf.use_tempaddr = -1;
412 } else {
413 in6_dev_hold(ndev);
414 ipv6_regen_rndid((unsigned long) ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 }
David S. Miller5d9efa72013-10-28 20:07:50 -0400416
Daniel Borkmann914faa12013-04-09 03:47:14 +0000417 ndev->token = in6addr_any;
Ingo Oeser322f74a2006-03-20 23:01:47 -0800418
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -0700419 if (netif_running(dev) && addrconf_qdisc_ok(dev))
Herbert Xu53aadcc2007-03-27 14:31:52 -0700420 ndev->if_flags |= IF_READY;
421
Ingo Oeser322f74a2006-03-20 23:01:47 -0800422 ipv6_mc_init_dev(ndev);
423 ndev->tstamp = jiffies;
WANG Conga317a2f2014-07-25 15:25:09 -0700424 err = addrconf_sysctl_register(ndev);
425 if (err) {
426 ipv6_mc_destroy_dev(ndev);
427 del_timer(&ndev->regen_timer);
Sabrina Dubroca2a189f92015-11-04 14:47:53 +0100428 snmp6_unregister_dev(ndev);
WANG Conga317a2f2014-07-25 15:25:09 -0700429 goto err_release;
430 }
David L Stevens30c4cf52007-01-04 12:31:14 -0800431 /* protected by rtnl_lock */
Eric Dumazetcf778b02012-01-12 04:41:32 +0000432 rcu_assign_pointer(dev->ip6_ptr, ndev);
YOSHIFUJI Hideakid88ae4c2007-01-14 21:48:40 -0800433
Hannes Frederic Sowa2c5e8932013-02-10 03:50:18 +0000434 /* Join interface-local all-node multicast group */
435 ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allnodes);
436
YOSHIFUJI Hideakid88ae4c2007-01-14 21:48:40 -0800437 /* Join all-node multicast group */
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +0900438 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
YOSHIFUJI Hideakid88ae4c2007-01-14 21:48:40 -0800439
Li Weid6ddef92012-03-05 14:45:17 +0000440 /* Join all-router multicast group if forwarding is set */
Li Wei8b2aaed2012-03-07 14:58:07 +0000441 if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST))
Li Weid6ddef92012-03-05 14:45:17 +0000442 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
443
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 return ndev;
WANG Conga317a2f2014-07-25 15:25:09 -0700445
446err_release:
447 neigh_parms_release(&nd_tbl, ndev->nd_parms);
448 ndev->dead = 1;
449 in6_dev_finish_destroy(ndev);
450 return ERR_PTR(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451}
452
Eldad Zack8e5e8f32012-04-01 07:49:08 +0000453static struct inet6_dev *ipv6_find_idev(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454{
455 struct inet6_dev *idev;
456
457 ASSERT_RTNL();
458
Stephen Hemmingere21e8462010-03-20 16:09:01 -0700459 idev = __in6_dev_get(dev);
460 if (!idev) {
461 idev = ipv6_add_dev(dev);
WANG Conga317a2f2014-07-25 15:25:09 -0700462 if (IS_ERR(idev))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 return NULL;
464 }
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +0900465
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466 if (dev->flags&IFF_UP)
467 ipv6_mc_up(idev);
468 return idev;
469}
470
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000471static int inet6_netconf_msgsize_devconf(int type)
472{
473 int size = NLMSG_ALIGN(sizeof(struct netconfmsg))
474 + nla_total_size(4); /* NETCONFA_IFINDEX */
Zhang Shengju136ba622016-03-10 08:55:50 +0000475 bool all = false;
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000476
Zhang Shengju136ba622016-03-10 08:55:50 +0000477 if (type == NETCONFA_ALL)
478 all = true;
479
480 if (all || type == NETCONFA_FORWARDING)
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000481 size += nla_total_size(4);
David S. Millerb1afce92012-12-04 14:46:34 -0500482#ifdef CONFIG_IPV6_MROUTE
Zhang Shengju136ba622016-03-10 08:55:50 +0000483 if (all || type == NETCONFA_MC_FORWARDING)
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000484 size += nla_total_size(4);
David S. Millerb1afce92012-12-04 14:46:34 -0500485#endif
Zhang Shengju136ba622016-03-10 08:55:50 +0000486 if (all || type == NETCONFA_PROXY_NEIGH)
stephen hemmingerc92d5492013-12-17 22:37:14 -0800487 size += nla_total_size(4);
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000488
Zhang Shengju136ba622016-03-10 08:55:50 +0000489 if (all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN)
Andy Gospodarek35103d12015-08-13 10:39:01 -0400490 size += nla_total_size(4);
491
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000492 return size;
493}
494
495static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex,
496 struct ipv6_devconf *devconf, u32 portid,
497 u32 seq, int event, unsigned int flags,
498 int type)
499{
500 struct nlmsghdr *nlh;
501 struct netconfmsg *ncm;
Zhang Shengju136ba622016-03-10 08:55:50 +0000502 bool all = false;
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000503
504 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg),
505 flags);
Ian Morris63159f22015-03-29 14:00:04 +0100506 if (!nlh)
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000507 return -EMSGSIZE;
508
Zhang Shengju136ba622016-03-10 08:55:50 +0000509 if (type == NETCONFA_ALL)
510 all = true;
511
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000512 ncm = nlmsg_data(nlh);
513 ncm->ncm_family = AF_INET6;
514
515 if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0)
516 goto nla_put_failure;
517
Zhang Shengju136ba622016-03-10 08:55:50 +0000518 if ((all || type == NETCONFA_FORWARDING) &&
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000519 nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0)
520 goto nla_put_failure;
David S. Millerb1afce92012-12-04 14:46:34 -0500521#ifdef CONFIG_IPV6_MROUTE
Zhang Shengju136ba622016-03-10 08:55:50 +0000522 if ((all || type == NETCONFA_MC_FORWARDING) &&
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000523 nla_put_s32(skb, NETCONFA_MC_FORWARDING,
524 devconf->mc_forwarding) < 0)
525 goto nla_put_failure;
David S. Millerb1afce92012-12-04 14:46:34 -0500526#endif
Zhang Shengju136ba622016-03-10 08:55:50 +0000527 if ((all || type == NETCONFA_PROXY_NEIGH) &&
stephen hemmingerc92d5492013-12-17 22:37:14 -0800528 nla_put_s32(skb, NETCONFA_PROXY_NEIGH, devconf->proxy_ndp) < 0)
529 goto nla_put_failure;
530
Zhang Shengju136ba622016-03-10 08:55:50 +0000531 if ((all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) &&
Andy Gospodarek35103d12015-08-13 10:39:01 -0400532 nla_put_s32(skb, NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN,
533 devconf->ignore_routes_with_linkdown) < 0)
534 goto nla_put_failure;
535
Johannes Berg053c0952015-01-16 22:09:00 +0100536 nlmsg_end(skb, nlh);
537 return 0;
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000538
539nla_put_failure:
540 nlmsg_cancel(skb, nlh);
541 return -EMSGSIZE;
542}
543
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000544void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
545 struct ipv6_devconf *devconf)
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000546{
547 struct sk_buff *skb;
548 int err = -ENOBUFS;
549
Eric Dumazet927265b2016-07-08 05:46:04 +0200550 skb = nlmsg_new(inet6_netconf_msgsize_devconf(type), GFP_KERNEL);
Ian Morris63159f22015-03-29 14:00:04 +0100551 if (!skb)
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000552 goto errout;
553
554 err = inet6_netconf_fill_devconf(skb, ifindex, devconf, 0, 0,
555 RTM_NEWNETCONF, 0, type);
556 if (err < 0) {
557 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
558 WARN_ON(err == -EMSGSIZE);
559 kfree_skb(skb);
560 goto errout;
561 }
Eric Dumazet927265b2016-07-08 05:46:04 +0200562 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_NETCONF, NULL, GFP_KERNEL);
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000563 return;
564errout:
Cong Dingbd779022012-12-18 12:08:56 +0000565 rtnl_set_sk_err(net, RTNLGRP_IPV6_NETCONF, err);
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000566}
567
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000568static const struct nla_policy devconf_ipv6_policy[NETCONFA_MAX+1] = {
569 [NETCONFA_IFINDEX] = { .len = sizeof(int) },
570 [NETCONFA_FORWARDING] = { .len = sizeof(int) },
stephen hemmingerc92d5492013-12-17 22:37:14 -0800571 [NETCONFA_PROXY_NEIGH] = { .len = sizeof(int) },
Andy Gospodarek35103d12015-08-13 10:39:01 -0400572 [NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN] = { .len = sizeof(int) },
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000573};
574
575static int inet6_netconf_get_devconf(struct sk_buff *in_skb,
Thomas Graf661d2962013-03-21 07:45:29 +0000576 struct nlmsghdr *nlh)
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000577{
578 struct net *net = sock_net(in_skb->sk);
579 struct nlattr *tb[NETCONFA_MAX+1];
580 struct netconfmsg *ncm;
581 struct sk_buff *skb;
582 struct ipv6_devconf *devconf;
583 struct inet6_dev *in6_dev;
584 struct net_device *dev;
585 int ifindex;
586 int err;
587
588 err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX,
589 devconf_ipv6_policy);
590 if (err < 0)
591 goto errout;
592
Anton Protopopova97eb332016-02-16 21:43:16 -0500593 err = -EINVAL;
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000594 if (!tb[NETCONFA_IFINDEX])
595 goto errout;
596
597 ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]);
598 switch (ifindex) {
599 case NETCONFA_IFINDEX_ALL:
600 devconf = net->ipv6.devconf_all;
601 break;
602 case NETCONFA_IFINDEX_DEFAULT:
603 devconf = net->ipv6.devconf_dflt;
604 break;
605 default:
606 dev = __dev_get_by_index(net, ifindex);
Ian Morris63159f22015-03-29 14:00:04 +0100607 if (!dev)
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000608 goto errout;
609 in6_dev = __in6_dev_get(dev);
Ian Morris63159f22015-03-29 14:00:04 +0100610 if (!in6_dev)
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000611 goto errout;
612 devconf = &in6_dev->cnf;
613 break;
614 }
615
616 err = -ENOBUFS;
Zhang Shengju136ba622016-03-10 08:55:50 +0000617 skb = nlmsg_new(inet6_netconf_msgsize_devconf(NETCONFA_ALL), GFP_ATOMIC);
Ian Morris63159f22015-03-29 14:00:04 +0100618 if (!skb)
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000619 goto errout;
620
621 err = inet6_netconf_fill_devconf(skb, ifindex, devconf,
622 NETLINK_CB(in_skb).portid,
623 nlh->nlmsg_seq, RTM_NEWNETCONF, 0,
Zhang Shengju136ba622016-03-10 08:55:50 +0000624 NETCONFA_ALL);
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000625 if (err < 0) {
626 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
627 WARN_ON(err == -EMSGSIZE);
628 kfree_skb(skb);
629 goto errout;
630 }
631 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
632errout:
633 return err;
634}
635
Nicolas Dichtel7a674202013-03-05 23:42:06 +0000636static int inet6_netconf_dump_devconf(struct sk_buff *skb,
637 struct netlink_callback *cb)
638{
639 struct net *net = sock_net(skb->sk);
640 int h, s_h;
641 int idx, s_idx;
642 struct net_device *dev;
643 struct inet6_dev *idev;
644 struct hlist_head *head;
645
646 s_h = cb->args[0];
647 s_idx = idx = cb->args[1];
648
649 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
650 idx = 0;
651 head = &net->dev_index_head[h];
652 rcu_read_lock();
Nicolas Dichtel63998ac2013-03-22 06:28:43 +0000653 cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^
654 net->dev_base_seq;
Nicolas Dichtel7a674202013-03-05 23:42:06 +0000655 hlist_for_each_entry_rcu(dev, head, index_hlist) {
656 if (idx < s_idx)
657 goto cont;
658 idev = __in6_dev_get(dev);
659 if (!idev)
660 goto cont;
661
662 if (inet6_netconf_fill_devconf(skb, dev->ifindex,
663 &idev->cnf,
664 NETLINK_CB(cb->skb).portid,
665 cb->nlh->nlmsg_seq,
666 RTM_NEWNETCONF,
667 NLM_F_MULTI,
Zhang Shengju136ba622016-03-10 08:55:50 +0000668 NETCONFA_ALL) < 0) {
Nicolas Dichtel7a674202013-03-05 23:42:06 +0000669 rcu_read_unlock();
670 goto done;
671 }
Nicolas Dichtel63998ac2013-03-22 06:28:43 +0000672 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
Nicolas Dichtel7a674202013-03-05 23:42:06 +0000673cont:
674 idx++;
675 }
676 rcu_read_unlock();
677 }
678 if (h == NETDEV_HASHENTRIES) {
679 if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL,
680 net->ipv6.devconf_all,
681 NETLINK_CB(cb->skb).portid,
682 cb->nlh->nlmsg_seq,
683 RTM_NEWNETCONF, NLM_F_MULTI,
Zhang Shengju136ba622016-03-10 08:55:50 +0000684 NETCONFA_ALL) < 0)
Nicolas Dichtel7a674202013-03-05 23:42:06 +0000685 goto done;
686 else
687 h++;
688 }
689 if (h == NETDEV_HASHENTRIES + 1) {
690 if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT,
691 net->ipv6.devconf_dflt,
692 NETLINK_CB(cb->skb).portid,
693 cb->nlh->nlmsg_seq,
694 RTM_NEWNETCONF, NLM_F_MULTI,
Zhang Shengju136ba622016-03-10 08:55:50 +0000695 NETCONFA_ALL) < 0)
Nicolas Dichtel7a674202013-03-05 23:42:06 +0000696 goto done;
697 else
698 h++;
699 }
700done:
701 cb->args[0] = h;
702 cb->args[1] = idx;
703
704 return skb->len;
705}
706
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707#ifdef CONFIG_SYSCTL
708static void dev_forward_change(struct inet6_dev *idev)
709{
710 struct net_device *dev;
711 struct inet6_ifaddr *ifa;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712
713 if (!idev)
714 return;
715 dev = idev->dev;
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700716 if (idev->cnf.forwarding)
717 dev_disable_lro(dev);
Amerigo Wang1a940832012-10-28 17:43:53 +0000718 if (dev->flags & IFF_MULTICAST) {
Hannes Frederic Sowa2c5e8932013-02-10 03:50:18 +0000719 if (idev->cnf.forwarding) {
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +0900720 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
Hannes Frederic Sowa2c5e8932013-02-10 03:50:18 +0000721 ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allrouters);
722 ipv6_dev_mc_inc(dev, &in6addr_sitelocal_allrouters);
723 } else {
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +0900724 ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters);
Hannes Frederic Sowa2c5e8932013-02-10 03:50:18 +0000725 ipv6_dev_mc_dec(dev, &in6addr_interfacelocal_allrouters);
726 ipv6_dev_mc_dec(dev, &in6addr_sitelocal_allrouters);
727 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 }
stephen hemminger502a2ff2010-03-17 20:31:13 +0000729
730 list_for_each_entry(ifa, &idev->addr_list, if_list) {
Michal Wrobel2c12a742007-02-26 15:36:10 -0800731 if (ifa->flags&IFA_F_TENTATIVE)
732 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733 if (idev->cnf.forwarding)
734 addrconf_join_anycast(ifa);
735 else
736 addrconf_leave_anycast(ifa);
737 }
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000738 inet6_netconf_notify_devconf(dev_net(dev), NETCONFA_FORWARDING,
739 dev->ifindex, &idev->cnf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740}
741
742
Pavel Emelyanove1869322008-01-10 17:43:50 -0800743static void addrconf_forward_change(struct net *net, __s32 newf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744{
745 struct net_device *dev;
746 struct inet6_dev *idev;
747
Ben Hutchings4acd4942012-08-14 08:54:51 +0000748 for_each_netdev(net, dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749 idev = __in6_dev_get(dev);
750 if (idev) {
Pavel Emelyanove1869322008-01-10 17:43:50 -0800751 int changed = (!idev->cnf.forwarding) ^ (!newf);
752 idev->cnf.forwarding = newf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753 if (changed)
754 dev_forward_change(idev);
755 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757}
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800758
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000759static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf)
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800760{
Pavel Emelyanovbff16c22008-01-10 17:42:13 -0800761 struct net *net;
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000762 int old;
763
764 if (!rtnl_trylock())
765 return restart_syscall();
Pavel Emelyanovbff16c22008-01-10 17:42:13 -0800766
767 net = (struct net *)table->extra2;
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000768 old = *p;
769 *p = newf;
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800770
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000771 if (p == &net->ipv6.devconf_dflt->forwarding) {
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000772 if ((!newf) ^ (!old))
773 inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING,
774 NETCONFA_IFINDEX_DEFAULT,
775 net->ipv6.devconf_dflt);
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000776 rtnl_unlock();
777 return 0;
Eric W. Biederman88af1822010-02-19 13:22:59 +0000778 }
Stephen Hemmingerb325fdd2009-02-26 06:55:31 +0000779
Pavel Emelyanove1869322008-01-10 17:43:50 -0800780 if (p == &net->ipv6.devconf_all->forwarding) {
Pavel Emelyanove1869322008-01-10 17:43:50 -0800781 net->ipv6.devconf_dflt->forwarding = newf;
782 addrconf_forward_change(net, newf);
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000783 if ((!newf) ^ (!old))
784 inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING,
785 NETCONFA_IFINDEX_ALL,
786 net->ipv6.devconf_all);
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000787 } else if ((!newf) ^ (!old))
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800788 dev_forward_change((struct inet6_dev *)table->extra1);
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700789 rtnl_unlock();
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800790
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000791 if (newf)
Daniel Lezcano7b4da532008-03-04 13:47:14 -0800792 rt6_purge_dflt_routers(net);
Stephen Hemmingerb325fdd2009-02-26 06:55:31 +0000793 return 1;
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800794}
Andy Gospodarek35103d12015-08-13 10:39:01 -0400795
796static void addrconf_linkdown_change(struct net *net, __s32 newf)
797{
798 struct net_device *dev;
799 struct inet6_dev *idev;
800
801 for_each_netdev(net, dev) {
802 idev = __in6_dev_get(dev);
803 if (idev) {
804 int changed = (!idev->cnf.ignore_routes_with_linkdown) ^ (!newf);
805
806 idev->cnf.ignore_routes_with_linkdown = newf;
807 if (changed)
808 inet6_netconf_notify_devconf(dev_net(dev),
809 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN,
810 dev->ifindex,
811 &idev->cnf);
812 }
813 }
814}
815
816static int addrconf_fixup_linkdown(struct ctl_table *table, int *p, int newf)
817{
818 struct net *net;
819 int old;
820
821 if (!rtnl_trylock())
822 return restart_syscall();
823
824 net = (struct net *)table->extra2;
825 old = *p;
826 *p = newf;
827
828 if (p == &net->ipv6.devconf_dflt->ignore_routes_with_linkdown) {
829 if ((!newf) ^ (!old))
830 inet6_netconf_notify_devconf(net,
831 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN,
832 NETCONFA_IFINDEX_DEFAULT,
833 net->ipv6.devconf_dflt);
834 rtnl_unlock();
835 return 0;
836 }
837
838 if (p == &net->ipv6.devconf_all->ignore_routes_with_linkdown) {
839 net->ipv6.devconf_dflt->ignore_routes_with_linkdown = newf;
840 addrconf_linkdown_change(net, newf);
841 if ((!newf) ^ (!old))
842 inet6_netconf_notify_devconf(net,
843 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN,
844 NETCONFA_IFINDEX_ALL,
845 net->ipv6.devconf_all);
846 }
847 rtnl_unlock();
848
849 return 1;
850}
851
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852#endif
853
stephen hemminger5c578aed2010-03-17 20:31:11 +0000854/* Nobody refers to this ifaddr, destroy it */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
856{
stephen hemmingerc2e21292010-03-17 20:31:10 +0000857 WARN_ON(!hlist_unhashed(&ifp->addr_lst));
Ilpo Järvinen547b7922008-07-25 21:43:18 -0700858
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859#ifdef NET_REFCNT_DEBUG
Joe Perches91df42b2012-05-15 14:11:54 +0000860 pr_debug("%s\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861#endif
862
863 in6_dev_put(ifp->idev);
864
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +0100865 if (cancel_delayed_work(&ifp->dad_work))
866 pr_notice("delayed DAD work was pending while freeing ifa=%p\n",
867 ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868
Herbert Xue9d3e082010-05-18 15:36:06 -0700869 if (ifp->state != INET6_IFADDR_STATE_DEAD) {
Joe Perchesf3213832012-05-15 14:11:53 +0000870 pr_warn("Freeing alive inet6 address %p\n", ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871 return;
872 }
Amerigo Wang94e187c2012-10-29 00:13:19 +0000873 ip6_rt_put(ifp->rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874
Lai Jiangshane5785982011-03-15 18:00:14 +0800875 kfree_rcu(ifp, rcu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876}
877
Brian Haleye55ffac2006-07-10 15:25:51 -0700878static void
879ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
880{
stephen hemminger502a2ff2010-03-17 20:31:13 +0000881 struct list_head *p;
YOSHIFUJI Hideaki8a6ce0c2006-07-11 13:05:30 -0700882 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
Brian Haleye55ffac2006-07-10 15:25:51 -0700883
884 /*
885 * Each device address list is sorted in order of scope -
886 * global before linklocal.
887 */
stephen hemminger502a2ff2010-03-17 20:31:13 +0000888 list_for_each(p, &idev->addr_list) {
889 struct inet6_ifaddr *ifa
890 = list_entry(p, struct inet6_ifaddr, if_list);
YOSHIFUJI Hideaki8a6ce0c2006-07-11 13:05:30 -0700891 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
Brian Haleye55ffac2006-07-10 15:25:51 -0700892 break;
893 }
894
David S. Millerb54c9b92010-03-25 21:25:30 -0700895 list_add_tail(&ifp->if_list, p);
Brian Haleye55ffac2006-07-10 15:25:51 -0700896}
897
Eric Dumazetddbe5032012-07-18 08:11:12 +0000898static u32 inet6_addr_hash(const struct in6_addr *addr)
YOSHIFUJI Hideaki3eb84f42008-04-10 15:42:08 +0900899{
Eric Dumazetddbe5032012-07-18 08:11:12 +0000900 return hash_32(ipv6_addr_hash(addr), IN6_ADDR_HSIZE_SHIFT);
YOSHIFUJI Hideaki3eb84f42008-04-10 15:42:08 +0900901}
902
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903/* On success it returns ifp with increased reference count */
904
905static struct inet6_ifaddr *
Jiri Pirko3f8f5292013-08-01 10:41:27 +0200906ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
907 const struct in6_addr *peer_addr, int pfxlen,
Jiri Benc8a226b22013-08-01 10:41:28 +0200908 int scope, u32 flags, u32 valid_lft, u32 prefered_lft)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909{
910 struct inet6_ifaddr *ifa = NULL;
911 struct rt6_info *rt;
stephen hemminger3a88a812010-03-17 20:31:12 +0000912 unsigned int hash;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913 int err = 0;
YOSHIFUJI Hideakid68b8272008-06-25 16:26:47 +0900914 int addr_type = ipv6_addr_type(addr);
915
916 if (addr_type == IPV6_ADDR_ANY ||
917 addr_type & IPV6_ADDR_MULTICAST ||
918 (!(idev->dev->flags & IFF_LOOPBACK) &&
919 addr_type & IPV6_ADDR_LOOPBACK))
920 return ERR_PTR(-EADDRNOTAVAIL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700922 rcu_read_lock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923 if (idev->dead) {
924 err = -ENODEV; /*XXX*/
925 goto out2;
926 }
927
Brian Haley56d417b2009-06-01 03:07:33 -0700928 if (idev->cnf.disable_ipv6) {
Brian Haley9bdd8d42009-03-18 18:22:48 -0700929 err = -EACCES;
930 goto out2;
931 }
932
stephen hemminger5c578aed2010-03-17 20:31:11 +0000933 spin_lock(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934
935 /* Ignore adding duplicate addresses on an interface */
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900936 if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) {
dingtianhongba3542e2013-08-17 10:27:04 +0800937 ADBG("ipv6_add_addr: already assigned\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 err = -EEXIST;
939 goto out;
940 }
941
Ingo Oeser322f74a2006-03-20 23:01:47 -0800942 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943
Ian Morris63159f22015-03-29 14:00:04 +0100944 if (!ifa) {
dingtianhongba3542e2013-08-17 10:27:04 +0800945 ADBG("ipv6_add_addr: malloc failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946 err = -ENOBUFS;
947 goto out;
948 }
949
David S. Miller8f031512011-12-06 16:48:14 -0500950 rt = addrconf_dst_alloc(idev, addr, false);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951 if (IS_ERR(rt)) {
952 err = PTR_ERR(rt);
953 goto out;
954 }
955
Jiri Pirkobba24892013-12-07 19:26:57 +0100956 neigh_parms_data_state_setall(idev->nd_parms);
957
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000958 ifa->addr = *addr;
Jiri Pirko3f8f5292013-08-01 10:41:27 +0200959 if (peer_addr)
960 ifa->peer_addr = *peer_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961
962 spin_lock_init(&ifa->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +0100963 INIT_DELAYED_WORK(&ifa->dad_work, addrconf_dad_work);
stephen hemmingerc2e21292010-03-17 20:31:10 +0000964 INIT_HLIST_NODE(&ifa->addr_lst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965 ifa->scope = scope;
966 ifa->prefix_len = pfxlen;
967 ifa->flags = flags | IFA_F_TENTATIVE;
Jiri Benc8a226b22013-08-01 10:41:28 +0200968 ifa->valid_lft = valid_lft;
969 ifa->prefered_lft = prefered_lft;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970 ifa->cstamp = ifa->tstamp = jiffies;
Daniel Borkmann617fe292013-04-09 03:47:16 +0000971 ifa->tokenized = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972
Keir Fraser57f5f542006-08-29 02:43:49 -0700973 ifa->rt = rt;
974
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975 ifa->idev = idev;
976 in6_dev_hold(idev);
977 /* For caller */
978 in6_ifa_hold(ifa);
979
980 /* Add to big hash table */
Eric Dumazetddbe5032012-07-18 08:11:12 +0000981 hash = inet6_addr_hash(addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982
stephen hemminger5c578aed2010-03-17 20:31:11 +0000983 hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]);
stephen hemminger5c578aed2010-03-17 20:31:11 +0000984 spin_unlock(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985
986 write_lock(&idev->lock);
987 /* Add to inet6_dev unicast addr list. */
Brian Haleye55ffac2006-07-10 15:25:51 -0700988 ipv6_link_dev_addr(idev, ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990 if (ifa->flags&IFA_F_TEMPORARY) {
stephen hemminger372e6c82010-03-17 20:31:09 +0000991 list_add(&ifa->tmp_list, &idev->tempaddr_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992 in6_ifa_hold(ifa);
993 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995 in6_ifa_hold(ifa);
996 write_unlock(&idev->lock);
997out2:
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700998 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999
YOSHIFUJI Hideakifd928332005-04-19 22:27:09 -07001000 if (likely(err == 0))
Cong Wangf88c91d2013-04-14 23:18:43 +08001001 inet6addr_notifier_call_chain(NETDEV_UP, ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001002 else {
1003 kfree(ifa);
1004 ifa = ERR_PTR(err);
1005 }
1006
1007 return ifa;
1008out:
stephen hemminger5c578aed2010-03-17 20:31:11 +00001009 spin_unlock(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010 goto out2;
1011}
1012
Thomas Haller5b84efe2014-01-15 15:36:59 +01001013enum cleanup_prefix_rt_t {
1014 CLEANUP_PREFIX_RT_NOP, /* no cleanup action for prefix route */
1015 CLEANUP_PREFIX_RT_DEL, /* delete the prefix route */
1016 CLEANUP_PREFIX_RT_EXPIRE, /* update the lifetime of the prefix route */
1017};
1018
1019/*
1020 * Check, whether the prefix for ifp would still need a prefix route
1021 * after deleting ifp. The function returns one of the CLEANUP_PREFIX_RT_*
1022 * constants.
1023 *
1024 * 1) we don't purge prefix if address was not permanent.
1025 * prefix is managed by its own lifetime.
1026 * 2) we also don't purge, if the address was IFA_F_NOPREFIXROUTE.
1027 * 3) if there are no addresses, delete prefix.
1028 * 4) if there are still other permanent address(es),
1029 * corresponding prefix is still permanent.
1030 * 5) if there are still other addresses with IFA_F_NOPREFIXROUTE,
1031 * don't purge the prefix, assume user space is managing it.
1032 * 6) otherwise, update prefix lifetime to the
1033 * longest valid lifetime among the corresponding
1034 * addresses on the device.
1035 * Note: subsequent RA will update lifetime.
1036 **/
1037static enum cleanup_prefix_rt_t
1038check_cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long *expires)
1039{
1040 struct inet6_ifaddr *ifa;
1041 struct inet6_dev *idev = ifp->idev;
1042 unsigned long lifetime;
1043 enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_DEL;
1044
1045 *expires = jiffies;
1046
1047 list_for_each_entry(ifa, &idev->addr_list, if_list) {
1048 if (ifa == ifp)
1049 continue;
1050 if (!ipv6_prefix_equal(&ifa->addr, &ifp->addr,
1051 ifp->prefix_len))
1052 continue;
1053 if (ifa->flags & (IFA_F_PERMANENT | IFA_F_NOPREFIXROUTE))
1054 return CLEANUP_PREFIX_RT_NOP;
1055
1056 action = CLEANUP_PREFIX_RT_EXPIRE;
1057
1058 spin_lock(&ifa->lock);
1059
1060 lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ);
1061 /*
1062 * Note: Because this address is
1063 * not permanent, lifetime <
1064 * LONG_MAX / HZ here.
1065 */
1066 if (time_before(*expires, ifa->tstamp + lifetime * HZ))
1067 *expires = ifa->tstamp + lifetime * HZ;
1068 spin_unlock(&ifa->lock);
1069 }
1070
1071 return action;
1072}
1073
1074static void
1075cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long expires, bool del_rt)
1076{
1077 struct rt6_info *rt;
1078
1079 rt = addrconf_get_prefix_route(&ifp->addr,
1080 ifp->prefix_len,
1081 ifp->idev->dev,
1082 0, RTF_GATEWAY | RTF_DEFAULT);
1083 if (rt) {
1084 if (del_rt)
1085 ip6_del_rt(rt);
1086 else {
1087 if (!(rt->rt6i_flags & RTF_EXPIRES))
1088 rt6_set_expires(rt, expires);
1089 ip6_rt_put(rt);
1090 }
1091 }
1092}
1093
1094
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095/* This function wants to get referenced ifp and releases it before return */
1096
1097static void ipv6_del_addr(struct inet6_ifaddr *ifp)
1098{
Herbert Xu4c5ff6a2010-05-18 15:54:18 -07001099 int state;
Thomas Haller5b84efe2014-01-15 15:36:59 +01001100 enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_NOP;
1101 unsigned long expires;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01001103 ASSERT_RTNL();
1104
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01001105 spin_lock_bh(&ifp->lock);
Herbert Xu4c5ff6a2010-05-18 15:54:18 -07001106 state = ifp->state;
Herbert Xue9d3e082010-05-18 15:36:06 -07001107 ifp->state = INET6_IFADDR_STATE_DEAD;
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01001108 spin_unlock_bh(&ifp->lock);
Herbert Xu4c5ff6a2010-05-18 15:54:18 -07001109
1110 if (state == INET6_IFADDR_STATE_DEAD)
1111 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112
stephen hemminger5c578aed2010-03-17 20:31:11 +00001113 spin_lock_bh(&addrconf_hash_lock);
1114 hlist_del_init_rcu(&ifp->addr_lst);
stephen hemminger5c578aed2010-03-17 20:31:11 +00001115 spin_unlock_bh(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116
Thomas Haller5b84efe2014-01-15 15:36:59 +01001117 write_lock_bh(&ifp->idev->lock);
David S. Miller5d9efa72013-10-28 20:07:50 -04001118
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119 if (ifp->flags&IFA_F_TEMPORARY) {
stephen hemminger372e6c82010-03-17 20:31:09 +00001120 list_del(&ifp->tmp_list);
1121 if (ifp->ifpub) {
1122 in6_ifa_put(ifp->ifpub);
1123 ifp->ifpub = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124 }
stephen hemminger372e6c82010-03-17 20:31:09 +00001125 __in6_ifa_put(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127
Thomas Haller5b84efe2014-01-15 15:36:59 +01001128 if (ifp->flags & IFA_F_PERMANENT && !(ifp->flags & IFA_F_NOPREFIXROUTE))
1129 action = check_cleanup_prefix_route(ifp, &expires);
stephen hemminger502a2ff2010-03-17 20:31:13 +00001130
Thomas Haller5b84efe2014-01-15 15:36:59 +01001131 list_del_init(&ifp->if_list);
1132 __in6_ifa_put(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133
Thomas Haller5b84efe2014-01-15 15:36:59 +01001134 write_unlock_bh(&ifp->idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01001136 addrconf_del_dad_work(ifp);
Andrey Vaginb2238562008-07-08 15:13:31 -07001137
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138 ipv6_ifa_notify(RTM_DELADDR, ifp);
1139
Cong Wangf88c91d2013-04-14 23:18:43 +08001140 inet6addr_notifier_call_chain(NETDEV_DOWN, ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001141
Thomas Haller5b84efe2014-01-15 15:36:59 +01001142 if (action != CLEANUP_PREFIX_RT_NOP) {
1143 cleanup_prefix_route(ifp, expires,
1144 action == CLEANUP_PREFIX_RT_DEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145 }
1146
Daniel Walterc3968a82011-04-13 21:10:57 +00001147 /* clean up prefsrc entries */
1148 rt6_remove_prefsrc(ifp);
Herbert Xu4c5ff6a2010-05-18 15:54:18 -07001149out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150 in6_ifa_put(ifp);
1151}
1152
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
1154{
1155 struct inet6_dev *idev = ifp->idev;
1156 struct in6_addr addr, *tmpaddr;
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00001157 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age;
Benoit Boissinoteac55bf2008-04-02 00:01:35 -07001158 unsigned long regen_advance;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159 int tmp_plen;
1160 int ret = 0;
Neil Horman95c385b2007-04-25 17:08:10 -07001161 u32 addr_flags;
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00001162 unsigned long now = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163
Jiri Pirko53bd6742013-12-06 09:45:22 +01001164 write_lock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165 if (ift) {
1166 spin_lock_bh(&ift->lock);
1167 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
1168 spin_unlock_bh(&ift->lock);
1169 tmpaddr = &addr;
1170 } else {
1171 tmpaddr = NULL;
1172 }
1173retry:
1174 in6_dev_hold(idev);
1175 if (idev->cnf.use_tempaddr <= 0) {
Jiri Pirko53bd6742013-12-06 09:45:22 +01001176 write_unlock_bh(&idev->lock);
Joe Perchesf3213832012-05-15 14:11:53 +00001177 pr_info("%s: use_tempaddr is disabled\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178 in6_dev_put(idev);
1179 ret = -1;
1180 goto out;
1181 }
1182 spin_lock_bh(&ifp->lock);
1183 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
1184 idev->cnf.use_tempaddr = -1; /*XXX*/
1185 spin_unlock_bh(&ifp->lock);
Jiri Pirko53bd6742013-12-06 09:45:22 +01001186 write_unlock_bh(&idev->lock);
Joe Perchesf3213832012-05-15 14:11:53 +00001187 pr_warn("%s: regeneration time exceeded - disabled temporary address support\n",
1188 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189 in6_dev_put(idev);
1190 ret = -1;
1191 goto out;
1192 }
1193 in6_ifa_hold(ifp);
1194 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00001195 __ipv6_try_regen_rndid(idev, tmpaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196 memcpy(&addr.s6_addr[8], idev->rndid, 8);
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00001197 age = (now - ifp->tstamp) / HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198 tmp_valid_lft = min_t(__u32,
1199 ifp->valid_lft,
Glenn Wurster7a876b02010-09-27 07:10:10 +00001200 idev->cnf.temp_valid_lft + age);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001201 tmp_prefered_lft = min_t(__u32,
1202 ifp->prefered_lft,
Glenn Wurster7a876b02010-09-27 07:10:10 +00001203 idev->cnf.temp_prefered_lft + age -
Ben Hutchings784e2712010-06-26 11:42:55 +00001204 idev->cnf.max_desync_factor);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205 tmp_plen = ifp->prefix_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206 tmp_tstamp = ifp->tstamp;
1207 spin_unlock_bh(&ifp->lock);
1208
Benoit Boissinoteac55bf2008-04-02 00:01:35 -07001209 regen_advance = idev->cnf.regen_max_retry *
Ian Morris67ba4152014-08-24 21:53:10 +01001210 idev->cnf.dad_transmits *
1211 NEIGH_VAR(idev->nd_parms, RETRANS_TIME) / HZ;
Jiri Pirko53bd6742013-12-06 09:45:22 +01001212 write_unlock_bh(&idev->lock);
Neil Horman95c385b2007-04-25 17:08:10 -07001213
Benoit Boissinoteac55bf2008-04-02 00:01:35 -07001214 /* A temporary address is created only if this calculated Preferred
1215 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
1216 * an implementation must not create a temporary address with a zero
1217 * Preferred Lifetime.
Heiner Kallweitecab6702014-03-12 22:13:19 +01001218 * Use age calculation as in addrconf_verify to avoid unnecessary
1219 * temporary addresses being generated.
Benoit Boissinoteac55bf2008-04-02 00:01:35 -07001220 */
Heiner Kallweitecab6702014-03-12 22:13:19 +01001221 age = (now - tmp_tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ;
1222 if (tmp_prefered_lft <= regen_advance + age) {
Benoit Boissinoteac55bf2008-04-02 00:01:35 -07001223 in6_ifa_put(ifp);
1224 in6_dev_put(idev);
1225 ret = -1;
1226 goto out;
1227 }
1228
Neil Horman95c385b2007-04-25 17:08:10 -07001229 addr_flags = IFA_F_TEMPORARY;
1230 /* set in addrconf_prefix_rcv() */
1231 if (ifp->flags & IFA_F_OPTIMISTIC)
1232 addr_flags |= IFA_F_OPTIMISTIC;
1233
Hannes Frederic Sowa4b08a8f2013-08-16 13:02:27 +02001234 ift = ipv6_add_addr(idev, &addr, NULL, tmp_plen,
1235 ipv6_addr_scope(&addr), addr_flags,
1236 tmp_valid_lft, tmp_prefered_lft);
1237 if (IS_ERR(ift)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238 in6_ifa_put(ifp);
1239 in6_dev_put(idev);
Joe Perchesf3213832012-05-15 14:11:53 +00001240 pr_info("%s: retry temporary address regeneration\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241 tmpaddr = &addr;
Jiri Pirko53bd6742013-12-06 09:45:22 +01001242 write_lock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243 goto retry;
1244 }
1245
1246 spin_lock_bh(&ift->lock);
1247 ift->ifpub = ifp;
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00001248 ift->cstamp = now;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249 ift->tstamp = tmp_tstamp;
1250 spin_unlock_bh(&ift->lock);
1251
David S. Millercf22f9a2012-04-14 21:37:40 -04001252 addrconf_dad_start(ift);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253 in6_ifa_put(ift);
1254 in6_dev_put(idev);
1255out:
1256 return ret;
1257}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258
1259/*
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001260 * Choose an appropriate source address (RFC3484)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261 */
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001262enum {
1263 IPV6_SADDR_RULE_INIT = 0,
1264 IPV6_SADDR_RULE_LOCAL,
1265 IPV6_SADDR_RULE_SCOPE,
1266 IPV6_SADDR_RULE_PREFERRED,
1267#ifdef CONFIG_IPV6_MIP6
1268 IPV6_SADDR_RULE_HOA,
1269#endif
1270 IPV6_SADDR_RULE_OIF,
1271 IPV6_SADDR_RULE_LABEL,
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001272 IPV6_SADDR_RULE_PRIVACY,
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001273 IPV6_SADDR_RULE_ORCHID,
1274 IPV6_SADDR_RULE_PREFIX,
Erik Kline7fd25612014-10-28 18:11:14 +09001275#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1276 IPV6_SADDR_RULE_NOT_OPTIMISTIC,
1277#endif
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001278 IPV6_SADDR_RULE_MAX
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001279};
1280
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001281struct ipv6_saddr_score {
1282 int rule;
1283 int addr_type;
1284 struct inet6_ifaddr *ifa;
1285 DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX);
1286 int scopedist;
1287 int matchlen;
1288};
1289
1290struct ipv6_saddr_dst {
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +09001291 const struct in6_addr *addr;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001292 int ifindex;
1293 int scope;
1294 int label;
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001295 unsigned int prefs;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001296};
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001297
Dave Jonesb6f99a22007-03-22 12:27:49 -07001298static inline int ipv6_saddr_preferred(int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001299{
Ulrich Weber45bb0062010-02-25 23:28:58 +00001300 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK))
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001301 return 1;
1302 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303}
1304
Erik Kline7fd25612014-10-28 18:11:14 +09001305static inline bool ipv6_use_optimistic_addr(struct inet6_dev *idev)
1306{
1307#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1308 return idev && idev->cnf.optimistic_dad && idev->cnf.use_optimistic;
1309#else
1310 return false;
1311#endif
1312}
1313
Benjamin Thery3de23252008-05-28 14:51:24 +02001314static int ipv6_get_saddr_eval(struct net *net,
1315 struct ipv6_saddr_score *score,
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001316 struct ipv6_saddr_dst *dst,
1317 int i)
1318{
1319 int ret;
1320
1321 if (i <= score->rule) {
1322 switch (i) {
1323 case IPV6_SADDR_RULE_SCOPE:
1324 ret = score->scopedist;
1325 break;
1326 case IPV6_SADDR_RULE_PREFIX:
1327 ret = score->matchlen;
1328 break;
1329 default:
1330 ret = !!test_bit(i, score->scorebits);
1331 }
1332 goto out;
1333 }
1334
1335 switch (i) {
1336 case IPV6_SADDR_RULE_INIT:
1337 /* Rule 0: remember if hiscore is not ready yet */
1338 ret = !!score->ifa;
1339 break;
1340 case IPV6_SADDR_RULE_LOCAL:
1341 /* Rule 1: Prefer same address */
1342 ret = ipv6_addr_equal(&score->ifa->addr, dst->addr);
1343 break;
1344 case IPV6_SADDR_RULE_SCOPE:
1345 /* Rule 2: Prefer appropriate scope
1346 *
1347 * ret
1348 * ^
1349 * -1 | d 15
1350 * ---+--+-+---> scope
1351 * |
1352 * | d is scope of the destination.
1353 * B-d | \
1354 * | \ <- smaller scope is better if
stephen hemmingerdb9c7c32014-01-12 11:26:32 -08001355 * B-15 | \ if scope is enough for destination.
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001356 * | ret = B - scope (-1 <= scope >= d <= 15).
1357 * d-C-1 | /
1358 * |/ <- greater is better
1359 * -C / if scope is not enough for destination.
1360 * /| ret = scope - C (-1 <= d < scope <= 15).
1361 *
1362 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1363 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1364 * Assume B = 0 and we get C > 29.
1365 */
1366 ret = __ipv6_addr_src_scope(score->addr_type);
1367 if (ret >= dst->scope)
1368 ret = -ret;
1369 else
1370 ret -= 128; /* 30 is enough */
1371 score->scopedist = ret;
1372 break;
1373 case IPV6_SADDR_RULE_PREFERRED:
Erik Kline7fd25612014-10-28 18:11:14 +09001374 {
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001375 /* Rule 3: Avoid deprecated and optimistic addresses */
Erik Kline7fd25612014-10-28 18:11:14 +09001376 u8 avoid = IFA_F_DEPRECATED;
1377
1378 if (!ipv6_use_optimistic_addr(score->ifa->idev))
1379 avoid |= IFA_F_OPTIMISTIC;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001380 ret = ipv6_saddr_preferred(score->addr_type) ||
Erik Kline7fd25612014-10-28 18:11:14 +09001381 !(score->ifa->flags & avoid);
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001382 break;
Erik Kline7fd25612014-10-28 18:11:14 +09001383 }
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001384#ifdef CONFIG_IPV6_MIP6
1385 case IPV6_SADDR_RULE_HOA:
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001386 {
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001387 /* Rule 4: Prefer home address */
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001388 int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA);
1389 ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001390 break;
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001391 }
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001392#endif
1393 case IPV6_SADDR_RULE_OIF:
1394 /* Rule 5: Prefer outgoing interface */
1395 ret = (!dst->ifindex ||
1396 dst->ifindex == score->ifa->idev->dev->ifindex);
1397 break;
1398 case IPV6_SADDR_RULE_LABEL:
1399 /* Rule 6: Prefer matching label */
Benjamin Thery3de23252008-05-28 14:51:24 +02001400 ret = ipv6_addr_label(net,
1401 &score->ifa->addr, score->addr_type,
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001402 score->ifa->idev->dev->ifindex) == dst->label;
1403 break;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001404 case IPV6_SADDR_RULE_PRIVACY:
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001405 {
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001406 /* Rule 7: Prefer public address
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001407 * Note: prefer temporary address if use_tempaddr >= 2
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001408 */
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001409 int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ?
1410 !!(dst->prefs & IPV6_PREFER_SRC_TMP) :
1411 score->ifa->idev->cnf.use_tempaddr >= 2;
1412 ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001413 break;
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001414 }
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001415 case IPV6_SADDR_RULE_ORCHID:
1416 /* Rule 8-: Prefer ORCHID vs ORCHID or
1417 * non-ORCHID vs non-ORCHID
1418 */
1419 ret = !(ipv6_addr_orchid(&score->ifa->addr) ^
1420 ipv6_addr_orchid(dst->addr));
1421 break;
1422 case IPV6_SADDR_RULE_PREFIX:
1423 /* Rule 8: Use longest matching prefix */
YOSHIFUJI Hideaki / 吉藤英明91b4b042012-09-10 18:41:07 +00001424 ret = ipv6_addr_diff(&score->ifa->addr, dst->addr);
1425 if (ret > score->ifa->prefix_len)
1426 ret = score->ifa->prefix_len;
1427 score->matchlen = ret;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001428 break;
Erik Kline7fd25612014-10-28 18:11:14 +09001429#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1430 case IPV6_SADDR_RULE_NOT_OPTIMISTIC:
1431 /* Optimistic addresses still have lower precedence than other
1432 * preferred addresses.
1433 */
1434 ret = !(score->ifa->flags & IFA_F_OPTIMISTIC);
1435 break;
1436#endif
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001437 default:
1438 ret = 0;
1439 }
1440
1441 if (ret)
1442 __set_bit(i, score->scorebits);
1443 score->rule = i;
1444out:
1445 return ret;
1446}
1447
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001448static int __ipv6_dev_get_saddr(struct net *net,
1449 struct ipv6_saddr_dst *dst,
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001450 struct inet6_dev *idev,
1451 struct ipv6_saddr_score *scores,
1452 int hiscore_idx)
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001453{
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001454 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 +09001455
1456 read_lock_bh(&idev->lock);
1457 list_for_each_entry(score->ifa, &idev->addr_list, if_list) {
1458 int i;
1459
1460 /*
1461 * - Tentative Address (RFC2462 section 5.4)
1462 * - A tentative address is not considered
1463 * "assigned to an interface" in the traditional
1464 * sense, unless it is also flagged as optimistic.
1465 * - Candidate Source Address (section 4)
1466 * - In any case, anycast addresses, multicast
1467 * addresses, and the unspecified address MUST
1468 * NOT be included in a candidate set.
1469 */
1470 if ((score->ifa->flags & IFA_F_TENTATIVE) &&
1471 (!(score->ifa->flags & IFA_F_OPTIMISTIC)))
1472 continue;
1473
1474 score->addr_type = __ipv6_addr_type(&score->ifa->addr);
1475
1476 if (unlikely(score->addr_type == IPV6_ADDR_ANY ||
1477 score->addr_type & IPV6_ADDR_MULTICAST)) {
1478 net_dbg_ratelimited("ADDRCONF: unspecified / multicast address assigned as unicast address on %s",
1479 idev->dev->name);
1480 continue;
1481 }
1482
1483 score->rule = -1;
1484 bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX);
1485
1486 for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) {
1487 int minihiscore, miniscore;
1488
1489 minihiscore = ipv6_get_saddr_eval(net, hiscore, dst, i);
1490 miniscore = ipv6_get_saddr_eval(net, score, dst, i);
1491
1492 if (minihiscore > miniscore) {
1493 if (i == IPV6_SADDR_RULE_SCOPE &&
1494 score->scopedist > 0) {
1495 /*
1496 * special case:
1497 * each remaining entry
1498 * has too small (not enough)
1499 * scope, because ifa entries
1500 * are sorted by their scope
1501 * values.
1502 */
1503 goto out;
1504 }
1505 break;
1506 } else if (minihiscore < miniscore) {
1507 if (hiscore->ifa)
1508 in6_ifa_put(hiscore->ifa);
1509
1510 in6_ifa_hold(score->ifa);
1511
1512 swap(hiscore, score);
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001513 hiscore_idx = 1 - hiscore_idx;
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001514
1515 /* restore our iterator */
1516 score->ifa = hiscore->ifa;
1517
1518 break;
1519 }
1520 }
1521 }
1522out:
1523 read_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001524 return hiscore_idx;
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001525}
1526
David Ahernafbac6012016-06-16 16:24:26 -07001527static int ipv6_get_saddr_master(struct net *net,
1528 const struct net_device *dst_dev,
1529 const struct net_device *master,
1530 struct ipv6_saddr_dst *dst,
1531 struct ipv6_saddr_score *scores,
1532 int hiscore_idx)
1533{
1534 struct inet6_dev *idev;
1535
1536 idev = __in6_dev_get(dst_dev);
1537 if (idev)
1538 hiscore_idx = __ipv6_dev_get_saddr(net, dst, idev,
1539 scores, hiscore_idx);
1540
1541 idev = __in6_dev_get(master);
1542 if (idev)
1543 hiscore_idx = __ipv6_dev_get_saddr(net, dst, idev,
1544 scores, hiscore_idx);
1545
1546 return hiscore_idx;
1547}
1548
Patrick McHardyb3f644f2012-08-26 19:14:14 +02001549int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +09001550 const struct in6_addr *daddr, unsigned int prefs,
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001551 struct in6_addr *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001552{
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001553 struct ipv6_saddr_score scores[2], *hiscore;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001554 struct ipv6_saddr_dst dst;
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001555 struct inet6_dev *idev;
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001556 struct net_device *dev;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001557 int dst_type;
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001558 bool use_oif_addr = false;
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001559 int hiscore_idx = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001560
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001561 dst_type = __ipv6_addr_type(daddr);
1562 dst.addr = daddr;
1563 dst.ifindex = dst_dev ? dst_dev->ifindex : 0;
1564 dst.scope = __ipv6_addr_src_scope(dst_type);
Benjamin Thery3de23252008-05-28 14:51:24 +02001565 dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex);
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001566 dst.prefs = prefs;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001567
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001568 scores[hiscore_idx].rule = -1;
1569 scores[hiscore_idx].ifa = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001571 rcu_read_lock();
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001572
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001573 /* Candidate Source Address (section 4)
1574 * - multicast and link-local destination address,
1575 * the set of candidate source address MUST only
1576 * include addresses assigned to interfaces
1577 * belonging to the same link as the outgoing
1578 * interface.
1579 * (- For site-local destination addresses, the
1580 * set of candidate source addresses MUST only
1581 * include addresses assigned to interfaces
1582 * belonging to the same site as the outgoing
1583 * interface.)
Erik Kline3985e8a2015-07-22 16:38:25 +09001584 * - "It is RECOMMENDED that the candidate source addresses
1585 * be the set of unicast addresses assigned to the
1586 * interface that will be used to send to the destination
1587 * (the 'outgoing' interface)." (RFC 6724)
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001588 */
1589 if (dst_dev) {
Erik Kline3985e8a2015-07-22 16:38:25 +09001590 idev = __in6_dev_get(dst_dev);
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001591 if ((dst_type & IPV6_ADDR_MULTICAST) ||
Erik Kline3985e8a2015-07-22 16:38:25 +09001592 dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL ||
1593 (idev && idev->cnf.use_oif_addrs_only)) {
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001594 use_oif_addr = true;
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001595 }
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001596 }
1597
1598 if (use_oif_addr) {
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001599 if (idev)
YOSHIFUJI Hideakic15df302015-07-16 16:51:30 +09001600 hiscore_idx = __ipv6_dev_get_saddr(net, &dst, idev, scores, hiscore_idx);
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001601 } else {
David Ahernafbac6012016-06-16 16:24:26 -07001602 const struct net_device *master;
1603 int master_idx = 0;
1604
1605 /* if dst_dev exists and is enslaved to an L3 device, then
1606 * prefer addresses from dst_dev and then the master over
1607 * any other enslaved devices in the L3 domain.
1608 */
1609 master = l3mdev_master_dev_rcu(dst_dev);
1610 if (master) {
1611 master_idx = master->ifindex;
1612
1613 hiscore_idx = ipv6_get_saddr_master(net, dst_dev,
1614 master, &dst,
1615 scores, hiscore_idx);
1616
1617 if (scores[hiscore_idx].ifa)
1618 goto out;
1619 }
1620
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001621 for_each_netdev_rcu(net, dev) {
David Ahernafbac6012016-06-16 16:24:26 -07001622 /* only consider addresses on devices in the
1623 * same L3 domain
1624 */
1625 if (l3mdev_master_ifindex_rcu(dev) != master_idx)
1626 continue;
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001627 idev = __in6_dev_get(dev);
1628 if (!idev)
1629 continue;
YOSHIFUJI Hideakic15df302015-07-16 16:51:30 +09001630 hiscore_idx = __ipv6_dev_get_saddr(net, &dst, idev, scores, hiscore_idx);
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001631 }
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001632 }
David Ahernafbac6012016-06-16 16:24:26 -07001633
1634out:
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001635 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001636
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001637 hiscore = &scores[hiscore_idx];
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001638 if (!hiscore->ifa)
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001639 return -EADDRNOTAVAIL;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001640
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +00001641 *saddr = hiscore->ifa->addr;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001642 in6_ifa_put(hiscore->ifa);
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001643 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001644}
YOSHIFUJI Hideaki5e5f3f02008-03-03 21:44:34 +09001645EXPORT_SYMBOL(ipv6_dev_get_saddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001646
Amerigo Wang89657792013-06-29 21:30:49 +08001647int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr,
Jiri Pirko479840f2013-12-06 09:45:21 +01001648 u32 banned_flags)
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02001649{
1650 struct inet6_ifaddr *ifp;
1651 int err = -EADDRNOTAVAIL;
1652
Hannes Frederic Sowa602582c2014-01-19 21:58:19 +01001653 list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) {
1654 if (ifp->scope > IFA_LINK)
1655 break;
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02001656 if (ifp->scope == IFA_LINK &&
1657 !(ifp->flags & banned_flags)) {
1658 *addr = ifp->addr;
1659 err = 0;
1660 break;
1661 }
1662 }
1663 return err;
1664}
1665
Neil Horman95c385b2007-04-25 17:08:10 -07001666int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
Jiri Pirko479840f2013-12-06 09:45:21 +01001667 u32 banned_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001668{
1669 struct inet6_dev *idev;
1670 int err = -EADDRNOTAVAIL;
1671
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001672 rcu_read_lock();
Stephen Hemmingere21e8462010-03-20 16:09:01 -07001673 idev = __in6_dev_get(dev);
1674 if (idev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001675 read_lock_bh(&idev->lock);
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02001676 err = __ipv6_get_lladdr(idev, addr, banned_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001677 read_unlock_bh(&idev->lock);
1678 }
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001679 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001680 return err;
1681}
1682
1683static int ipv6_count_addresses(struct inet6_dev *idev)
1684{
1685 int cnt = 0;
1686 struct inet6_ifaddr *ifp;
1687
1688 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00001689 list_for_each_entry(ifp, &idev->addr_list, if_list)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001690 cnt++;
1691 read_unlock_bh(&idev->lock);
1692 return cnt;
1693}
1694
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001695int ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
Florian Westphal2a7851b2013-05-17 03:56:10 +00001696 const struct net_device *dev, int strict)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001697{
Erik Klinec58da4c2015-02-04 20:01:23 +09001698 return ipv6_chk_addr_and_flags(net, addr, dev, strict, IFA_F_TENTATIVE);
1699}
1700EXPORT_SYMBOL(ipv6_chk_addr);
1701
1702int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
1703 const struct net_device *dev, int strict,
1704 u32 banned_flags)
1705{
Stephen Hemmingereedf0422010-05-17 22:27:12 -07001706 struct inet6_ifaddr *ifp;
Eric Dumazetddbe5032012-07-18 08:11:12 +00001707 unsigned int hash = inet6_addr_hash(addr);
Erik Klinec58da4c2015-02-04 20:01:23 +09001708 u32 ifp_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001709
stephen hemminger5c578aed2010-03-17 20:31:11 +00001710 rcu_read_lock_bh();
Sasha Levinb67bfe02013-02-27 17:06:00 -08001711 hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09001712 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcanobfeade02008-01-10 22:43:18 -08001713 continue;
Erik Klinec58da4c2015-02-04 20:01:23 +09001714 /* Decouple optimistic from tentative for evaluation here.
1715 * Ban optimistic addresses explicitly, when required.
1716 */
1717 ifp_flags = (ifp->flags&IFA_F_OPTIMISTIC)
1718 ? (ifp->flags&~IFA_F_TENTATIVE)
1719 : ifp->flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001720 if (ipv6_addr_equal(&ifp->addr, addr) &&
Erik Klinec58da4c2015-02-04 20:01:23 +09001721 !(ifp_flags&banned_flags) &&
Ian Morris63159f22015-03-29 14:00:04 +01001722 (!dev || ifp->idev->dev == dev ||
Stephen Hemmingereedf0422010-05-17 22:27:12 -07001723 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) {
1724 rcu_read_unlock_bh();
1725 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001726 }
1727 }
stephen hemminger5c578aed2010-03-17 20:31:11 +00001728
Stephen Hemmingereedf0422010-05-17 22:27:12 -07001729 rcu_read_unlock_bh();
1730 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001731}
Erik Klinec58da4c2015-02-04 20:01:23 +09001732EXPORT_SYMBOL(ipv6_chk_addr_and_flags);
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +09001733
David S. Miller3e81c6d2010-03-20 16:18:00 -07001734static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
1735 struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001736{
Eric Dumazetddbe5032012-07-18 08:11:12 +00001737 unsigned int hash = inet6_addr_hash(addr);
stephen hemmingerc2e21292010-03-17 20:31:10 +00001738 struct inet6_ifaddr *ifp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001739
Sasha Levinb67bfe02013-02-27 17:06:00 -08001740 hlist_for_each_entry(ifp, &inet6_addr_lst[hash], addr_lst) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09001741 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcano06bfe652008-01-10 22:43:42 -08001742 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001743 if (ipv6_addr_equal(&ifp->addr, addr)) {
Ian Morris63159f22015-03-29 14:00:04 +01001744 if (!dev || ifp->idev->dev == dev)
David S. Miller3e81c6d2010-03-20 16:18:00 -07001745 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001746 }
1747 }
David S. Miller3e81c6d2010-03-20 16:18:00 -07001748 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001749}
1750
Catalin\(ux\) M. BOIE7df37ff2013-09-23 23:04:19 +03001751/* Compares an address/prefix_len with addresses on device @dev.
1752 * If one is found it returns true.
1753 */
1754bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
1755 const unsigned int prefix_len, struct net_device *dev)
1756{
1757 struct inet6_dev *idev;
1758 struct inet6_ifaddr *ifa;
1759 bool ret = false;
1760
1761 rcu_read_lock();
1762 idev = __in6_dev_get(dev);
1763 if (idev) {
1764 read_lock_bh(&idev->lock);
1765 list_for_each_entry(ifa, &idev->addr_list, if_list) {
1766 ret = ipv6_prefix_equal(addr, &ifa->addr, prefix_len);
1767 if (ret)
1768 break;
1769 }
1770 read_unlock_bh(&idev->lock);
1771 }
1772 rcu_read_unlock();
1773
1774 return ret;
1775}
1776EXPORT_SYMBOL(ipv6_chk_custom_prefix);
1777
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001778int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev)
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -04001779{
1780 struct inet6_dev *idev;
1781 struct inet6_ifaddr *ifa;
1782 int onlink;
1783
1784 onlink = 0;
1785 rcu_read_lock();
1786 idev = __in6_dev_get(dev);
1787 if (idev) {
1788 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00001789 list_for_each_entry(ifa, &idev->addr_list, if_list) {
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -04001790 onlink = ipv6_prefix_equal(addr, &ifa->addr,
1791 ifa->prefix_len);
1792 if (onlink)
1793 break;
1794 }
1795 read_unlock_bh(&idev->lock);
1796 }
1797 rcu_read_unlock();
1798 return onlink;
1799}
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -04001800EXPORT_SYMBOL(ipv6_chk_prefix);
1801
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +09001802struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr,
Daniel Lezcano1cab3da2008-01-10 22:44:09 -08001803 struct net_device *dev, int strict)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001804{
David S. Millerb79d1d52010-03-25 21:39:21 -07001805 struct inet6_ifaddr *ifp, *result = NULL;
Eric Dumazetddbe5032012-07-18 08:11:12 +00001806 unsigned int hash = inet6_addr_hash(addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001807
stephen hemminger5c578aed2010-03-17 20:31:11 +00001808 rcu_read_lock_bh();
Sasha Levinb67bfe02013-02-27 17:06:00 -08001809 hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09001810 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcano1cab3da2008-01-10 22:44:09 -08001811 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001812 if (ipv6_addr_equal(&ifp->addr, addr)) {
Ian Morris63159f22015-03-29 14:00:04 +01001813 if (!dev || ifp->idev->dev == dev ||
Linus Torvalds1da177e2005-04-16 15:20:36 -07001814 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
David S. Millerb79d1d52010-03-25 21:39:21 -07001815 result = ifp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001816 in6_ifa_hold(ifp);
1817 break;
1818 }
1819 }
1820 }
stephen hemminger5c578aed2010-03-17 20:31:11 +00001821 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001822
David S. Millerb79d1d52010-03-25 21:39:21 -07001823 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001824}
1825
Linus Torvalds1da177e2005-04-16 15:20:36 -07001826/* Gets referenced address, destroys ifaddr */
1827
Brian Haleycc411d02009-09-09 14:41:32 +00001828static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001829{
Lubomir Rintel3d171f32016-01-08 13:47:23 +01001830 if (dad_failed)
1831 ifp->flags |= IFA_F_DADFAILED;
1832
Linus Torvalds1da177e2005-04-16 15:20:36 -07001833 if (ifp->flags&IFA_F_PERMANENT) {
1834 spin_lock_bh(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01001835 addrconf_del_dad_work(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001836 ifp->flags |= IFA_F_TENTATIVE;
1837 spin_unlock_bh(&ifp->lock);
Herbert Xue2577a02010-03-13 12:23:29 -08001838 if (dad_failed)
1839 ipv6_ifa_notify(0, ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001840 in6_ifa_put(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001841 } else if (ifp->flags&IFA_F_TEMPORARY) {
1842 struct inet6_ifaddr *ifpub;
1843 spin_lock_bh(&ifp->lock);
1844 ifpub = ifp->ifpub;
1845 if (ifpub) {
1846 in6_ifa_hold(ifpub);
1847 spin_unlock_bh(&ifp->lock);
1848 ipv6_create_tempaddr(ifpub, ifp);
1849 in6_ifa_put(ifpub);
1850 } else {
1851 spin_unlock_bh(&ifp->lock);
1852 }
1853 ipv6_del_addr(ifp);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01001854 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001855 ipv6_del_addr(ifp);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01001856 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001857}
1858
Herbert Xuf2344a12010-05-18 15:55:27 -07001859static int addrconf_dad_end(struct inet6_ifaddr *ifp)
1860{
1861 int err = -ENOENT;
1862
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01001863 spin_lock_bh(&ifp->lock);
Herbert Xuf2344a12010-05-18 15:55:27 -07001864 if (ifp->state == INET6_IFADDR_STATE_DAD) {
1865 ifp->state = INET6_IFADDR_STATE_POSTDAD;
1866 err = 0;
1867 }
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01001868 spin_unlock_bh(&ifp->lock);
Herbert Xuf2344a12010-05-18 15:55:27 -07001869
1870 return err;
1871}
1872
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09001873void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1874{
Hannes Frederic Sowa5f40ef72015-03-23 23:36:04 +01001875 struct in6_addr addr;
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09001876 struct inet6_dev *idev = ifp->idev;
Hannes Frederic Sowa1855b7c2015-03-23 23:36:05 +01001877 struct net *net = dev_net(ifp->idev->dev);
Brian Haley9bdd8d42009-03-18 18:22:48 -07001878
Ursula Braun853dc2e2010-10-24 23:06:43 +00001879 if (addrconf_dad_end(ifp)) {
1880 in6_ifa_put(ifp);
Herbert Xuf2344a12010-05-18 15:55:27 -07001881 return;
Ursula Braun853dc2e2010-10-24 23:06:43 +00001882 }
Herbert Xuf2344a12010-05-18 15:55:27 -07001883
Joe Perchese87cc472012-05-13 21:56:26 +00001884 net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n",
1885 ifp->idev->dev->name, &ifp->addr);
Brian Haley9bdd8d42009-03-18 18:22:48 -07001886
Hannes Frederic Sowa5f40ef72015-03-23 23:36:04 +01001887 spin_lock_bh(&ifp->lock);
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09001888
Hannes Frederic Sowa5f40ef72015-03-23 23:36:04 +01001889 if (ifp->flags & IFA_F_STABLE_PRIVACY) {
1890 int scope = ifp->scope;
1891 u32 flags = ifp->flags;
1892 struct in6_addr new_addr;
1893 struct inet6_ifaddr *ifp2;
1894 u32 valid_lft, preferred_lft;
1895 int pfxlen = ifp->prefix_len;
Hannes Frederic Sowa5f40ef72015-03-23 23:36:04 +01001896 int retries = ifp->stable_privacy_retry + 1;
1897
Hannes Frederic Sowa1855b7c2015-03-23 23:36:05 +01001898 if (retries > net->ipv6.sysctl.idgen_retries) {
Hannes Frederic Sowa5f40ef72015-03-23 23:36:04 +01001899 net_info_ratelimited("%s: privacy stable address generation failed because of DAD conflicts!\n",
1900 ifp->idev->dev->name);
1901 goto errdad;
1902 }
1903
1904 new_addr = ifp->addr;
1905 if (ipv6_generate_stable_address(&new_addr, retries,
1906 idev))
1907 goto errdad;
1908
1909 valid_lft = ifp->valid_lft;
1910 preferred_lft = ifp->prefered_lft;
1911
1912 spin_unlock_bh(&ifp->lock);
1913
1914 if (idev->cnf.max_addresses &&
1915 ipv6_count_addresses(idev) >=
1916 idev->cnf.max_addresses)
1917 goto lock_errdad;
1918
1919 net_info_ratelimited("%s: generating new stable privacy address because of DAD conflict\n",
1920 ifp->idev->dev->name);
1921
1922 ifp2 = ipv6_add_addr(idev, &new_addr, NULL, pfxlen,
1923 scope, flags, valid_lft,
1924 preferred_lft);
1925 if (IS_ERR(ifp2))
1926 goto lock_errdad;
1927
1928 spin_lock_bh(&ifp2->lock);
1929 ifp2->stable_privacy_retry = retries;
1930 ifp2->state = INET6_IFADDR_STATE_PREDAD;
1931 spin_unlock_bh(&ifp2->lock);
1932
Hannes Frederic Sowa1855b7c2015-03-23 23:36:05 +01001933 addrconf_mod_dad_work(ifp2, net->ipv6.sysctl.idgen_delay);
Hannes Frederic Sowa5f40ef72015-03-23 23:36:04 +01001934 in6_ifa_put(ifp2);
1935lock_errdad:
1936 spin_lock_bh(&ifp->lock);
1937 } else if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) {
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09001938 addr.s6_addr32[0] = htonl(0xfe800000);
1939 addr.s6_addr32[1] = 0;
1940
1941 if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) &&
1942 ipv6_addr_equal(&ifp->addr, &addr)) {
1943 /* DAD failed for link-local based on MAC address */
1944 idev->cnf.disable_ipv6 = 1;
Brian Haley9bdd8d42009-03-18 18:22:48 -07001945
Joe Perchesf3213832012-05-15 14:11:53 +00001946 pr_info("%s: IPv6 being disabled!\n",
Brian Haley9bdd8d42009-03-18 18:22:48 -07001947 ifp->idev->dev->name);
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09001948 }
1949 }
1950
Hannes Frederic Sowa5f40ef72015-03-23 23:36:04 +01001951errdad:
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01001952 /* transition from _POSTDAD to _ERRDAD */
1953 ifp->state = INET6_IFADDR_STATE_ERRDAD;
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01001954 spin_unlock_bh(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01001955
1956 addrconf_mod_dad_work(ifp, 0);
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09001957}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001958
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +02001959/* Join to solicited addr multicast group.
1960 * caller must hold RTNL */
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001961void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001962{
1963 struct in6_addr maddr;
1964
1965 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1966 return;
1967
1968 addrconf_addr_solict_mult(addr, &maddr);
1969 ipv6_dev_mc_inc(dev, &maddr);
1970}
1971
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +02001972/* caller must hold RTNL */
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001973void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001974{
1975 struct in6_addr maddr;
1976
1977 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1978 return;
1979
1980 addrconf_addr_solict_mult(addr, &maddr);
1981 __ipv6_dev_mc_dec(idev, &maddr);
1982}
1983
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +02001984/* caller must hold RTNL */
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03001985static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001986{
1987 struct in6_addr addr;
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01001988
Hannes Frederic Sowa88ad3142014-01-06 17:53:14 +01001989 if (ifp->prefix_len >= 127) /* RFC 6164 */
Bjørn Mork2bda8a02011-07-05 23:04:13 +00001990 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001991 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1992 if (ipv6_addr_any(&addr))
1993 return;
WANG Cong013b4d92014-09-11 15:35:11 -07001994 __ipv6_dev_ac_inc(ifp->idev, &addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001995}
1996
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +02001997/* caller must hold RTNL */
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03001998static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001999{
2000 struct in6_addr addr;
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01002001
Hannes Frederic Sowa88ad3142014-01-06 17:53:14 +01002002 if (ifp->prefix_len >= 127) /* RFC 6164 */
YOSHIFUJI Hideaki32019e62011-07-24 11:44:34 +00002003 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002004 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
2005 if (ipv6_addr_any(&addr))
2006 return;
2007 __ipv6_dev_ac_dec(ifp->idev, &addr);
2008}
2009
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +00002010static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev)
2011{
Alexander Aring5241c2d2015-12-14 20:55:22 +01002012 if (dev->addr_len != EUI64_ADDR_LEN)
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +00002013 return -1;
Alexander Aring5241c2d2015-12-14 20:55:22 +01002014 memcpy(eui, dev->dev_addr, EUI64_ADDR_LEN);
YOSHIFUJI Hideaki / 吉藤英明5e98a362013-01-28 10:44:29 +00002015 eui[0] ^= 2;
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +00002016 return 0;
2017}
2018
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00002019static int addrconf_ifid_ieee1394(u8 *eui, struct net_device *dev)
2020{
2021 union fwnet_hwaddr *ha;
2022
2023 if (dev->addr_len != FWNET_ALEN)
2024 return -1;
2025
2026 ha = (union fwnet_hwaddr *)dev->dev_addr;
2027
2028 memcpy(eui, &ha->uc.uniq_id, sizeof(ha->uc.uniq_id));
2029 eui[0] ^= 2;
2030 return 0;
2031}
2032
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08002033static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
2034{
2035 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
2036 if (dev->addr_len != ARCNET_ALEN)
2037 return -1;
2038 memset(eui, 0, 7);
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002039 eui[7] = *(u8 *)dev->dev_addr;
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08002040 return 0;
2041}
2042
2043static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
2044{
2045 if (dev->addr_len != INFINIBAND_ALEN)
2046 return -1;
2047 memcpy(eui, dev->dev_addr + 12, 8);
2048 eui[0] |= 2;
2049 return 0;
2050}
2051
stephen hemmingerc61393e2010-10-04 20:17:53 +00002052static int __ipv6_isatap_ifid(u8 *eui, __be32 addr)
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09002053{
Sascha Hlusiak9af28512009-05-19 12:56:51 +00002054 if (addr == 0)
2055 return -1;
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09002056 eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
2057 ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
2058 ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
2059 ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
2060 ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
2061 ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
2062 eui[1] = 0;
2063 eui[2] = 0x5E;
2064 eui[3] = 0xFE;
2065 memcpy(eui + 4, &addr, 4);
2066 return 0;
2067}
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09002068
2069static int addrconf_ifid_sit(u8 *eui, struct net_device *dev)
2070{
2071 if (dev->priv_flags & IFF_ISATAP)
2072 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
2073 return -1;
2074}
2075
stephen hemmingeraee80b52011-06-08 10:44:30 +00002076static int addrconf_ifid_gre(u8 *eui, struct net_device *dev)
2077{
2078 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
2079}
2080
Nicolas Dichtele8377352013-08-20 12:16:06 +02002081static int addrconf_ifid_ip6tnl(u8 *eui, struct net_device *dev)
2082{
2083 memcpy(eui, dev->perm_addr, 3);
2084 memcpy(eui + 5, dev->perm_addr + 3, 3);
2085 eui[3] = 0xFF;
2086 eui[4] = 0xFE;
2087 eui[0] ^= 2;
2088 return 0;
2089}
2090
Linus Torvalds1da177e2005-04-16 15:20:36 -07002091static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
2092{
2093 switch (dev->type) {
2094 case ARPHRD_ETHER:
2095 case ARPHRD_FDDI:
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08002096 return addrconf_ifid_eui48(eui, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002097 case ARPHRD_ARCNET:
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08002098 return addrconf_ifid_arcnet(eui, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002099 case ARPHRD_INFINIBAND:
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08002100 return addrconf_ifid_infiniband(eui, dev);
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11002101 case ARPHRD_SIT:
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09002102 return addrconf_ifid_sit(eui, dev);
stephen hemmingeraee80b52011-06-08 10:44:30 +00002103 case ARPHRD_IPGRE:
2104 return addrconf_ifid_gre(eui, dev);
Jukka Rissanene74bccb2013-12-11 17:05:36 +02002105 case ARPHRD_6LOWPAN:
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +00002106 return addrconf_ifid_eui64(eui, dev);
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00002107 case ARPHRD_IEEE1394:
2108 return addrconf_ifid_ieee1394(eui, dev);
Nicolas Dichtele8377352013-08-20 12:16:06 +02002109 case ARPHRD_TUNNEL6:
2110 return addrconf_ifid_ip6tnl(eui, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002111 }
2112 return -1;
2113}
2114
2115static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
2116{
2117 int err = -1;
2118 struct inet6_ifaddr *ifp;
2119
2120 read_lock_bh(&idev->lock);
Hannes Frederic Sowa602582c2014-01-19 21:58:19 +01002121 list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) {
2122 if (ifp->scope > IFA_LINK)
2123 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002124 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
2125 memcpy(eui, ifp->addr.s6_addr+8, 8);
2126 err = 0;
2127 break;
2128 }
2129 }
2130 read_unlock_bh(&idev->lock);
2131 return err;
2132}
2133
Linus Torvalds1da177e2005-04-16 15:20:36 -07002134/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00002135static void __ipv6_regen_rndid(struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002136{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002137regen:
YOSHIFUJI Hideaki955189e2006-03-20 16:54:09 -08002138 get_random_bytes(idev->rndid, sizeof(idev->rndid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002139 idev->rndid[0] &= ~0x02;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002140
2141 /*
2142 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
2143 * check if generated address is not inappropriate
2144 *
2145 * - Reserved subnet anycast (RFC 2526)
2146 * 11111101 11....11 1xxxxxxx
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11002147 * - ISATAP (RFC4214) 6.1
Linus Torvalds1da177e2005-04-16 15:20:36 -07002148 * 00-00-5E-FE-xx-xx-xx-xx
2149 * - value 0
2150 * - XXX: already assigned to an address on the device
2151 */
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002152 if (idev->rndid[0] == 0xfd &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07002153 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
2154 (idev->rndid[7]&0x80))
2155 goto regen;
2156 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
2157 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
2158 goto regen;
2159 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
2160 goto regen;
2161 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002162}
2163
2164static void ipv6_regen_rndid(unsigned long data)
2165{
2166 struct inet6_dev *idev = (struct inet6_dev *) data;
2167 unsigned long expires;
2168
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07002169 rcu_read_lock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002170 write_lock_bh(&idev->lock);
2171
2172 if (idev->dead)
2173 goto out;
2174
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00002175 __ipv6_regen_rndid(idev);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002176
Linus Torvalds1da177e2005-04-16 15:20:36 -07002177 expires = jiffies +
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002178 idev->cnf.temp_prefered_lft * HZ -
Jiri Pirko1f9248e2013-12-07 19:26:53 +01002179 idev->cnf.regen_max_retry * idev->cnf.dad_transmits *
2180 NEIGH_VAR(idev->nd_parms, RETRANS_TIME) -
Ben Hutchings784e2712010-06-26 11:42:55 +00002181 idev->cnf.max_desync_factor * HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002182 if (time_before(expires, jiffies)) {
Joe Perchesf3213832012-05-15 14:11:53 +00002183 pr_warn("%s: too short regeneration interval; timer disabled for %s\n",
2184 __func__, idev->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002185 goto out;
2186 }
2187
2188 if (!mod_timer(&idev->regen_timer, expires))
2189 in6_dev_hold(idev);
2190
2191out:
2192 write_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07002193 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002194 in6_dev_put(idev);
2195}
2196
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00002197static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr)
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002198{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002199 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00002200 __ipv6_regen_rndid(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002201}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002202
2203/*
2204 * Add prefix route.
2205 */
2206
2207static void
2208addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
Jamal Hadi Salime431b8c2005-06-18 22:55:31 -07002209 unsigned long expires, u32 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002210{
Thomas Graf86872cb2006-08-22 00:01:08 -07002211 struct fib6_config cfg = {
David Ahernca254492015-10-12 11:47:10 -07002212 .fc_table = l3mdev_fib_table(dev) ? : RT6_TABLE_PREFIX,
Thomas Graf86872cb2006-08-22 00:01:08 -07002213 .fc_metric = IP6_RT_PRIO_ADDRCONF,
2214 .fc_ifindex = dev->ifindex,
2215 .fc_expires = expires,
2216 .fc_dst_len = plen,
2217 .fc_flags = RTF_UP | flags,
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09002218 .fc_nlinfo.nl_net = dev_net(dev),
Stephen Hemmingerf410a1f2008-08-23 05:16:46 -07002219 .fc_protocol = RTPROT_KERNEL,
Thomas Graf86872cb2006-08-22 00:01:08 -07002220 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07002221
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +00002222 cfg.fc_dst = *pfx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002223
2224 /* Prevent useless cloning on PtP SIT.
2225 This thing is done here expecting that the whole
2226 class of non-broadcast devices need not cloning.
2227 */
Amerigo Wang07a93622012-10-29 16:23:10 +00002228#if IS_ENABLED(CONFIG_IPV6_SIT)
Thomas Graf86872cb2006-08-22 00:01:08 -07002229 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
2230 cfg.fc_flags |= RTF_NONEXTHOP;
Joerg Roedel0be669b2006-10-10 14:49:53 -07002231#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002232
Thomas Graf86872cb2006-08-22 00:01:08 -07002233 ip6_route_add(&cfg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002234}
2235
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002236
2237static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx,
2238 int plen,
2239 const struct net_device *dev,
2240 u32 flags, u32 noflags)
2241{
2242 struct fib6_node *fn;
2243 struct rt6_info *rt = NULL;
2244 struct fib6_table *table;
David Ahernca254492015-10-12 11:47:10 -07002245 u32 tb_id = l3mdev_fib_table(dev) ? : RT6_TABLE_PREFIX;
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002246
David Ahernca254492015-10-12 11:47:10 -07002247 table = fib6_get_table(dev_net(dev), tb_id);
Ian Morris63159f22015-03-29 14:00:04 +01002248 if (!table)
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002249 return NULL;
2250
Li RongQing5744dd92012-09-11 21:59:01 +00002251 read_lock_bh(&table->tb6_lock);
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002252 fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0);
2253 if (!fn)
2254 goto out;
Martin KaFai Lau1f56a012015-04-28 13:03:03 -07002255
2256 noflags |= RTF_CACHE;
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002257 for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) {
David S. Millerd1918542011-12-28 20:19:20 -05002258 if (rt->dst.dev->ifindex != dev->ifindex)
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002259 continue;
2260 if ((rt->rt6i_flags & flags) != flags)
2261 continue;
Romain Kuntz85da53b2013-01-09 15:02:26 +01002262 if ((rt->rt6i_flags & noflags) != 0)
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002263 continue;
2264 dst_hold(&rt->dst);
2265 break;
2266 }
2267out:
Li RongQing5744dd92012-09-11 21:59:01 +00002268 read_unlock_bh(&table->tb6_lock);
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002269 return rt;
2270}
2271
2272
Linus Torvalds1da177e2005-04-16 15:20:36 -07002273/* Create "default" multicast route to the interface */
2274
2275static void addrconf_add_mroute(struct net_device *dev)
2276{
Thomas Graf86872cb2006-08-22 00:01:08 -07002277 struct fib6_config cfg = {
David Ahernca254492015-10-12 11:47:10 -07002278 .fc_table = l3mdev_fib_table(dev) ? : RT6_TABLE_LOCAL,
Thomas Graf86872cb2006-08-22 00:01:08 -07002279 .fc_metric = IP6_RT_PRIO_ADDRCONF,
2280 .fc_ifindex = dev->ifindex,
2281 .fc_dst_len = 8,
2282 .fc_flags = RTF_UP,
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09002283 .fc_nlinfo.nl_net = dev_net(dev),
Thomas Graf86872cb2006-08-22 00:01:08 -07002284 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07002285
Thomas Graf86872cb2006-08-22 00:01:08 -07002286 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
2287
2288 ip6_route_add(&cfg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002289}
2290
Linus Torvalds1da177e2005-04-16 15:20:36 -07002291static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
2292{
2293 struct inet6_dev *idev;
2294
2295 ASSERT_RTNL();
2296
Stephen Hemmingere21e8462010-03-20 16:09:01 -07002297 idev = ipv6_find_idev(dev);
2298 if (!idev)
Brian Haley64e724f2010-07-20 10:34:30 +00002299 return ERR_PTR(-ENOBUFS);
2300
2301 if (idev->cnf.disable_ipv6)
2302 return ERR_PTR(-EACCES);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002303
2304 /* Add default multicast route */
David Ahernba46ee42016-06-13 13:44:18 -07002305 if (!(dev->flags & IFF_LOOPBACK) && !netif_is_l3_master(dev))
Li Wei4af04ab2011-12-06 21:23:45 +00002306 addrconf_add_mroute(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002307
Linus Torvalds1da177e2005-04-16 15:20:36 -07002308 return idev;
2309}
2310
Jiri Pirko53bd6742013-12-06 09:45:22 +01002311static void manage_tempaddrs(struct inet6_dev *idev,
2312 struct inet6_ifaddr *ifp,
2313 __u32 valid_lft, __u32 prefered_lft,
2314 bool create, unsigned long now)
2315{
2316 u32 flags;
2317 struct inet6_ifaddr *ift;
2318
2319 read_lock_bh(&idev->lock);
2320 /* update all temporary addresses in the list */
2321 list_for_each_entry(ift, &idev->tempaddr_list, tmp_list) {
2322 int age, max_valid, max_prefered;
2323
2324 if (ifp != ift->ifpub)
2325 continue;
2326
2327 /* RFC 4941 section 3.3:
2328 * If a received option will extend the lifetime of a public
2329 * address, the lifetimes of temporary addresses should
2330 * be extended, subject to the overall constraint that no
2331 * temporary addresses should ever remain "valid" or "preferred"
2332 * for a time longer than (TEMP_VALID_LIFETIME) or
2333 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), respectively.
2334 */
2335 age = (now - ift->cstamp) / HZ;
2336 max_valid = idev->cnf.temp_valid_lft - age;
2337 if (max_valid < 0)
2338 max_valid = 0;
2339
2340 max_prefered = idev->cnf.temp_prefered_lft -
2341 idev->cnf.max_desync_factor - age;
2342 if (max_prefered < 0)
2343 max_prefered = 0;
2344
2345 if (valid_lft > max_valid)
2346 valid_lft = max_valid;
2347
2348 if (prefered_lft > max_prefered)
2349 prefered_lft = max_prefered;
2350
2351 spin_lock(&ift->lock);
2352 flags = ift->flags;
2353 ift->valid_lft = valid_lft;
2354 ift->prefered_lft = prefered_lft;
2355 ift->tstamp = now;
2356 if (prefered_lft > 0)
2357 ift->flags &= ~IFA_F_DEPRECATED;
2358
2359 spin_unlock(&ift->lock);
2360 if (!(flags&IFA_F_TENTATIVE))
2361 ipv6_ifa_notify(0, ift);
2362 }
2363
2364 if ((create || list_empty(&idev->tempaddr_list)) &&
2365 idev->cnf.use_tempaddr > 0) {
2366 /* When a new public address is created as described
2367 * in [ADDRCONF], also create a new temporary address.
2368 * Also create a temporary address if it's enabled but
2369 * no temporary address currently exists.
2370 */
2371 read_unlock_bh(&idev->lock);
2372 ipv6_create_tempaddr(ifp, NULL);
2373 } else {
2374 read_unlock_bh(&idev->lock);
2375 }
2376}
2377
Bjørn Morkcc9da6c2015-12-16 16:44:38 +01002378static bool is_addr_mode_generate_stable(struct inet6_dev *idev)
2379{
2380 return idev->addr_gen_mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY ||
2381 idev->addr_gen_mode == IN6_ADDR_GEN_MODE_RANDOM;
2382}
2383
Alexander Aringcc84b3c2016-06-15 21:20:24 +02002384int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev,
2385 const struct prefix_info *pinfo,
2386 struct inet6_dev *in6_dev,
2387 const struct in6_addr *addr, int addr_type,
2388 u32 addr_flags, bool sllao, bool tokenized,
2389 __u32 valid_lft, u32 prefered_lft)
Alexander Aring4f672232016-06-15 21:20:22 +02002390{
2391 struct inet6_ifaddr *ifp = ipv6_get_ifaddr(net, addr, dev, 1);
2392 int create = 0, update_lft = 0;
2393
2394 if (!ifp && valid_lft) {
2395 int max_addresses = in6_dev->cnf.max_addresses;
2396
2397#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2398 if (in6_dev->cnf.optimistic_dad &&
2399 !net->ipv6.devconf_all->forwarding && sllao)
2400 addr_flags |= IFA_F_OPTIMISTIC;
2401#endif
2402
2403 /* Do not allow to create too much of autoconfigured
2404 * addresses; this would be too easy way to crash kernel.
2405 */
2406 if (!max_addresses ||
2407 ipv6_count_addresses(in6_dev) < max_addresses)
2408 ifp = ipv6_add_addr(in6_dev, addr, NULL,
2409 pinfo->prefix_len,
2410 addr_type&IPV6_ADDR_SCOPE_MASK,
2411 addr_flags, valid_lft,
2412 prefered_lft);
2413
2414 if (IS_ERR_OR_NULL(ifp))
2415 return -1;
2416
2417 update_lft = 0;
2418 create = 1;
2419 spin_lock_bh(&ifp->lock);
2420 ifp->flags |= IFA_F_MANAGETEMPADDR;
2421 ifp->cstamp = jiffies;
2422 ifp->tokenized = tokenized;
2423 spin_unlock_bh(&ifp->lock);
2424 addrconf_dad_start(ifp);
2425 }
2426
2427 if (ifp) {
2428 u32 flags;
2429 unsigned long now;
2430 u32 stored_lft;
2431
2432 /* update lifetime (RFC2462 5.5.3 e) */
2433 spin_lock_bh(&ifp->lock);
2434 now = jiffies;
2435 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
2436 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
2437 else
2438 stored_lft = 0;
2439 if (!update_lft && !create && stored_lft) {
2440 const u32 minimum_lft = min_t(u32,
2441 stored_lft, MIN_VALID_LIFETIME);
2442 valid_lft = max(valid_lft, minimum_lft);
2443
2444 /* RFC4862 Section 5.5.3e:
2445 * "Note that the preferred lifetime of the
2446 * corresponding address is always reset to
2447 * the Preferred Lifetime in the received
2448 * Prefix Information option, regardless of
2449 * whether the valid lifetime is also reset or
2450 * ignored."
2451 *
2452 * So we should always update prefered_lft here.
2453 */
2454 update_lft = 1;
2455 }
2456
2457 if (update_lft) {
2458 ifp->valid_lft = valid_lft;
2459 ifp->prefered_lft = prefered_lft;
2460 ifp->tstamp = now;
2461 flags = ifp->flags;
2462 ifp->flags &= ~IFA_F_DEPRECATED;
2463 spin_unlock_bh(&ifp->lock);
2464
2465 if (!(flags&IFA_F_TENTATIVE))
2466 ipv6_ifa_notify(0, ifp);
2467 } else
2468 spin_unlock_bh(&ifp->lock);
2469
2470 manage_tempaddrs(in6_dev, ifp, valid_lft, prefered_lft,
2471 create, now);
2472
2473 in6_ifa_put(ifp);
2474 addrconf_verify();
2475 }
2476
2477 return 0;
2478}
Alexander Aringcc84b3c2016-06-15 21:20:24 +02002479EXPORT_SYMBOL_GPL(addrconf_prefix_rcv_add_addr);
Alexander Aring4f672232016-06-15 21:20:22 +02002480
Neil Hormane6bff992012-01-04 10:49:15 +00002481void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002482{
2483 struct prefix_info *pinfo;
2484 __u32 valid_lft;
2485 __u32 prefered_lft;
Alexander Aring4f672232016-06-15 21:20:22 +02002486 int addr_type, err;
Hannes Frederic Sowa64236f32015-03-23 23:36:02 +01002487 u32 addr_flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002488 struct inet6_dev *in6_dev;
Brian Haley56d417b2009-06-01 03:07:33 -07002489 struct net *net = dev_net(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002490
2491 pinfo = (struct prefix_info *) opt;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002492
Linus Torvalds1da177e2005-04-16 15:20:36 -07002493 if (len < sizeof(struct prefix_info)) {
dingtianhongba3542e2013-08-17 10:27:04 +08002494 ADBG("addrconf: prefix option too short\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002495 return;
2496 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002497
Linus Torvalds1da177e2005-04-16 15:20:36 -07002498 /*
2499 * Validation checks ([ADDRCONF], page 19)
2500 */
2501
2502 addr_type = ipv6_addr_type(&pinfo->prefix);
2503
2504 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
2505 return;
2506
2507 valid_lft = ntohl(pinfo->valid);
2508 prefered_lft = ntohl(pinfo->prefered);
2509
2510 if (prefered_lft > valid_lft) {
Joe Perchese87cc472012-05-13 21:56:26 +00002511 net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002512 return;
2513 }
2514
2515 in6_dev = in6_dev_get(dev);
2516
Ian Morris63159f22015-03-29 14:00:04 +01002517 if (!in6_dev) {
Joe Perchese87cc472012-05-13 21:56:26 +00002518 net_dbg_ratelimited("addrconf: device %s not configured\n",
2519 dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002520 return;
2521 }
2522
2523 /*
2524 * Two things going on here:
2525 * 1) Add routes for on-link prefixes
2526 * 2) Configure prefixes with the auto flag set
2527 */
2528
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002529 if (pinfo->onlink) {
2530 struct rt6_info *rt;
2531 unsigned long rt_expires;
2532
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002533 /* Avoid arithmetic overflow. Really, we could
2534 * save rt_expires in seconds, likely valid_lft,
2535 * but it would require division in fib gc, that it
2536 * not good.
2537 */
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002538 if (HZ > USER_HZ)
2539 rt_expires = addrconf_timeout_fixup(valid_lft, HZ);
2540 else
2541 rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ);
YOSHIFUJI Hideaki3dd4bc62005-12-19 14:02:45 -08002542
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002543 if (addrconf_finite_timeout(rt_expires))
2544 rt_expires *= HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002545
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002546 rt = addrconf_get_prefix_route(&pinfo->prefix,
2547 pinfo->prefix_len,
2548 dev,
2549 RTF_ADDRCONF | RTF_PREFIX_RT,
2550 RTF_GATEWAY | RTF_DEFAULT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002551
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002552 if (rt) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002553 /* Autoconf prefix route */
2554 if (valid_lft == 0) {
2555 ip6_del_rt(rt);
2556 rt = NULL;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002557 } else if (addrconf_finite_timeout(rt_expires)) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002558 /* not infinity */
Gao feng1716a962012-04-06 00:13:10 +00002559 rt6_set_expires(rt, jiffies + rt_expires);
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002560 } else {
Gao feng1716a962012-04-06 00:13:10 +00002561 rt6_clean_expires(rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002562 }
2563 } else if (valid_lft) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002564 clock_t expires = 0;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002565 int flags = RTF_ADDRCONF | RTF_PREFIX_RT;
2566 if (addrconf_finite_timeout(rt_expires)) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002567 /* not infinity */
2568 flags |= RTF_EXPIRES;
2569 expires = jiffies_to_clock_t(rt_expires);
2570 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002571 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002572 dev, expires, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002573 }
Amerigo Wang94e187c2012-10-29 00:13:19 +00002574 ip6_rt_put(rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002575 }
2576
2577 /* Try to figure out our local address for this prefix */
2578
2579 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002580 struct in6_addr addr;
Alexander Aringf997c552016-06-15 21:20:23 +02002581 bool tokenized = false, dev_addr_generated = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002582
2583 if (pinfo->prefix_len == 64) {
2584 memcpy(&addr, &pinfo->prefix, 8);
Daniel Borkmannf53adae2013-04-08 04:01:30 +00002585
2586 if (!ipv6_addr_any(&in6_dev->token)) {
2587 read_lock_bh(&in6_dev->lock);
2588 memcpy(addr.s6_addr + 8,
2589 in6_dev->token.s6_addr + 8, 8);
2590 read_unlock_bh(&in6_dev->lock);
Daniel Borkmann617fe292013-04-09 03:47:16 +00002591 tokenized = true;
Bjørn Morkcc9da6c2015-12-16 16:44:38 +01002592 } else if (is_addr_mode_generate_stable(in6_dev) &&
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01002593 !ipv6_generate_stable_address(&addr, 0,
2594 in6_dev)) {
Hannes Frederic Sowa64236f32015-03-23 23:36:02 +01002595 addr_flags |= IFA_F_STABLE_PRIVACY;
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01002596 goto ok;
Daniel Borkmannf53adae2013-04-08 04:01:30 +00002597 } else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
2598 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
Alexander Aring4f672232016-06-15 21:20:22 +02002599 goto put;
Alexander Aringf997c552016-06-15 21:20:23 +02002600 } else {
2601 dev_addr_generated = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002602 }
2603 goto ok;
2604 }
Joe Perchese87cc472012-05-13 21:56:26 +00002605 net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n",
2606 pinfo->prefix_len);
Alexander Aring4f672232016-06-15 21:20:22 +02002607 goto put;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002608
2609ok:
Alexander Aring4f672232016-06-15 21:20:22 +02002610 err = addrconf_prefix_rcv_add_addr(net, dev, pinfo, in6_dev,
2611 &addr, addr_type,
2612 addr_flags, sllao,
2613 tokenized, valid_lft,
2614 prefered_lft);
2615 if (err)
2616 goto put;
Alexander Aringf997c552016-06-15 21:20:23 +02002617
2618 /* Ignore error case here because previous prefix add addr was
2619 * successful which will be notified.
2620 */
2621 ndisc_ops_prefix_rcv_add_addr(net, dev, pinfo, in6_dev, &addr,
2622 addr_type, addr_flags, sllao,
2623 tokenized, valid_lft,
2624 prefered_lft,
2625 dev_addr_generated);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002626 }
2627 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
Alexander Aring4f672232016-06-15 21:20:22 +02002628put:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002629 in6_dev_put(in6_dev);
2630}
2631
2632/*
2633 * Set destination address.
2634 * Special case for SIT interfaces where we create a new "virtual"
2635 * device.
2636 */
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002637int addrconf_set_dstaddr(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002638{
2639 struct in6_ifreq ireq;
2640 struct net_device *dev;
2641 int err = -EINVAL;
2642
2643 rtnl_lock();
2644
2645 err = -EFAULT;
2646 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2647 goto err_exit;
2648
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002649 dev = __dev_get_by_index(net, ireq.ifr6_ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002650
2651 err = -ENODEV;
Ian Morris63159f22015-03-29 14:00:04 +01002652 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002653 goto err_exit;
2654
Amerigo Wang07a93622012-10-29 16:23:10 +00002655#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002656 if (dev->type == ARPHRD_SIT) {
Stephen Hemminger5bc3eb72008-11-19 21:52:05 -08002657 const struct net_device_ops *ops = dev->netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002658 struct ifreq ifr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002659 struct ip_tunnel_parm p;
2660
2661 err = -EADDRNOTAVAIL;
2662 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
2663 goto err_exit;
2664
2665 memset(&p, 0, sizeof(p));
2666 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
2667 p.iph.saddr = 0;
2668 p.iph.version = 4;
2669 p.iph.ihl = 5;
2670 p.iph.protocol = IPPROTO_IPV6;
2671 p.iph.ttl = 64;
Stephen Hemmingerd20b3102008-01-21 00:48:43 -08002672 ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002673
Stephen Hemminger5bc3eb72008-11-19 21:52:05 -08002674 if (ops->ndo_do_ioctl) {
2675 mm_segment_t oldfs = get_fs();
2676
2677 set_fs(KERNEL_DS);
2678 err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL);
2679 set_fs(oldfs);
2680 } else
2681 err = -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002682
2683 if (err == 0) {
2684 err = -ENOBUFS;
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002685 dev = __dev_get_by_name(net, p.name);
2686 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002687 goto err_exit;
2688 err = dev_open(dev);
2689 }
2690 }
Joerg Roedel0be669b2006-10-10 14:49:53 -07002691#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002692
2693err_exit:
2694 rtnl_unlock();
2695 return err;
2696}
2697
Madhu Challa93a714d2015-02-25 09:58:35 -08002698static int ipv6_mc_config(struct sock *sk, bool join,
2699 const struct in6_addr *addr, int ifindex)
2700{
2701 int ret;
2702
2703 ASSERT_RTNL();
2704
2705 lock_sock(sk);
2706 if (join)
Marcelo Ricardo Leitner54ff9ef2015-03-18 14:50:43 -03002707 ret = ipv6_sock_mc_join(sk, ifindex, addr);
Madhu Challa93a714d2015-02-25 09:58:35 -08002708 else
Marcelo Ricardo Leitner54ff9ef2015-03-18 14:50:43 -03002709 ret = ipv6_sock_mc_drop(sk, ifindex, addr);
Madhu Challa93a714d2015-02-25 09:58:35 -08002710 release_sock(sk);
2711
2712 return ret;
2713}
2714
Linus Torvalds1da177e2005-04-16 15:20:36 -07002715/*
2716 * Manual configuration of address on an interface
2717 */
Jiri Pirko479840f2013-12-06 09:45:21 +01002718static int inet6_addr_add(struct net *net, int ifindex,
2719 const struct in6_addr *pfx,
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00002720 const struct in6_addr *peer_pfx,
Jiri Pirko479840f2013-12-06 09:45:21 +01002721 unsigned int plen, __u32 ifa_flags,
2722 __u32 prefered_lft, __u32 valid_lft)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002723{
2724 struct inet6_ifaddr *ifp;
2725 struct inet6_dev *idev;
2726 struct net_device *dev;
Madhu Challa93a714d2015-02-25 09:58:35 -08002727 unsigned long timeout;
2728 clock_t expires;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002729 int scope;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002730 u32 flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002731
2732 ASSERT_RTNL();
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002733
Thomas Graf24ef0da2008-05-28 16:54:22 +02002734 if (plen > 128)
2735 return -EINVAL;
2736
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002737 /* check the lifetime */
2738 if (!valid_lft || prefered_lft > valid_lft)
2739 return -EINVAL;
2740
Jiri Pirko53bd6742013-12-06 09:45:22 +01002741 if (ifa_flags & IFA_F_MANAGETEMPADDR && plen != 64)
2742 return -EINVAL;
2743
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002744 dev = __dev_get_by_index(net, ifindex);
2745 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002746 return -ENODEV;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002747
Brian Haley64e724f2010-07-20 10:34:30 +00002748 idev = addrconf_add_dev(dev);
2749 if (IS_ERR(idev))
2750 return PTR_ERR(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002751
Madhu Challa93a714d2015-02-25 09:58:35 -08002752 if (ifa_flags & IFA_F_MCAUTOJOIN) {
2753 int ret = ipv6_mc_config(net->ipv6.mc_autojoin_sk,
2754 true, pfx, ifindex);
2755
2756 if (ret < 0)
2757 return ret;
2758 }
2759
Linus Torvalds1da177e2005-04-16 15:20:36 -07002760 scope = ipv6_addr_scope(pfx);
2761
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002762 timeout = addrconf_timeout_fixup(valid_lft, HZ);
2763 if (addrconf_finite_timeout(timeout)) {
2764 expires = jiffies_to_clock_t(timeout * HZ);
2765 valid_lft = timeout;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002766 flags = RTF_EXPIRES;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002767 } else {
2768 expires = 0;
2769 flags = 0;
2770 ifa_flags |= IFA_F_PERMANENT;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002771 }
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002772
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002773 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
2774 if (addrconf_finite_timeout(timeout)) {
2775 if (timeout == 0)
2776 ifa_flags |= IFA_F_DEPRECATED;
2777 prefered_lft = timeout;
2778 }
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002779
Jiri Benc8a226b22013-08-01 10:41:28 +02002780 ifp = ipv6_add_addr(idev, pfx, peer_pfx, plen, scope, ifa_flags,
2781 valid_lft, prefered_lft);
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002782
Linus Torvalds1da177e2005-04-16 15:20:36 -07002783 if (!IS_ERR(ifp)) {
Thomas Haller761aac72014-01-15 15:36:58 +01002784 if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) {
2785 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
2786 expires, flags);
2787 }
2788
Neil Horman95c385b2007-04-25 17:08:10 -07002789 /*
2790 * Note that section 3.1 of RFC 4429 indicates
2791 * that the Optimistic flag should not be set for
2792 * manually configured addresses
2793 */
David S. Millercf22f9a2012-04-14 21:37:40 -04002794 addrconf_dad_start(ifp);
Jiri Pirko53bd6742013-12-06 09:45:22 +01002795 if (ifa_flags & IFA_F_MANAGETEMPADDR)
2796 manage_tempaddrs(idev, ifp, valid_lft, prefered_lft,
2797 true, jiffies);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002798 in6_ifa_put(ifp);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01002799 addrconf_verify_rtnl();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002800 return 0;
Madhu Challa93a714d2015-02-25 09:58:35 -08002801 } else if (ifa_flags & IFA_F_MCAUTOJOIN) {
2802 ipv6_mc_config(net->ipv6.mc_autojoin_sk,
2803 false, pfx, ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002804 }
2805
2806 return PTR_ERR(ifp);
2807}
2808
Heiner Kallweit6046d5b2014-04-20 21:29:36 +02002809static int inet6_addr_del(struct net *net, int ifindex, u32 ifa_flags,
2810 const struct in6_addr *pfx, unsigned int plen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002811{
2812 struct inet6_ifaddr *ifp;
2813 struct inet6_dev *idev;
2814 struct net_device *dev;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002815
Thomas Graf24ef0da2008-05-28 16:54:22 +02002816 if (plen > 128)
2817 return -EINVAL;
2818
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002819 dev = __dev_get_by_index(net, ifindex);
2820 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002821 return -ENODEV;
2822
Ian Morrise5d08d72014-11-23 21:28:43 +00002823 idev = __in6_dev_get(dev);
Ian Morris63159f22015-03-29 14:00:04 +01002824 if (!idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002825 return -ENXIO;
2826
2827 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00002828 list_for_each_entry(ifp, &idev->addr_list, if_list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002829 if (ifp->prefix_len == plen &&
2830 ipv6_addr_equal(pfx, &ifp->addr)) {
2831 in6_ifa_hold(ifp);
2832 read_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002833
Heiner Kallweit6046d5b2014-04-20 21:29:36 +02002834 if (!(ifp->flags & IFA_F_TEMPORARY) &&
2835 (ifa_flags & IFA_F_MANAGETEMPADDR))
2836 manage_tempaddrs(idev, ifp, 0, 0, false,
2837 jiffies);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002838 ipv6_del_addr(ifp);
Heiner Kallweit6046d5b2014-04-20 21:29:36 +02002839 addrconf_verify_rtnl();
Madhu Challa93a714d2015-02-25 09:58:35 -08002840 if (ipv6_addr_is_multicast(pfx)) {
2841 ipv6_mc_config(net->ipv6.mc_autojoin_sk,
2842 false, pfx, dev->ifindex);
2843 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002844 return 0;
2845 }
2846 }
2847 read_unlock_bh(&idev->lock);
2848 return -EADDRNOTAVAIL;
2849}
2850
2851
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002852int addrconf_add_ifaddr(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002853{
2854 struct in6_ifreq ireq;
2855 int err;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002856
Eric W. Biedermanaf31f412012-11-16 03:03:06 +00002857 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002858 return -EPERM;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002859
Linus Torvalds1da177e2005-04-16 15:20:36 -07002860 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2861 return -EFAULT;
2862
2863 rtnl_lock();
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00002864 err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, NULL,
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002865 ireq.ifr6_prefixlen, IFA_F_PERMANENT,
2866 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002867 rtnl_unlock();
2868 return err;
2869}
2870
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002871int addrconf_del_ifaddr(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002872{
2873 struct in6_ifreq ireq;
2874 int err;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002875
Eric W. Biedermanaf31f412012-11-16 03:03:06 +00002876 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002877 return -EPERM;
2878
2879 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2880 return -EFAULT;
2881
2882 rtnl_lock();
Heiner Kallweit6046d5b2014-04-20 21:29:36 +02002883 err = inet6_addr_del(net, ireq.ifr6_ifindex, 0, &ireq.ifr6_addr,
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002884 ireq.ifr6_prefixlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002885 rtnl_unlock();
2886 return err;
2887}
2888
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002889static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
2890 int plen, int scope)
2891{
2892 struct inet6_ifaddr *ifp;
2893
Jiri Benc8a226b22013-08-01 10:41:28 +02002894 ifp = ipv6_add_addr(idev, addr, NULL, plen,
Hannes Frederic Sowa07edd742014-01-08 15:43:22 +01002895 scope, IFA_F_PERMANENT,
2896 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002897 if (!IS_ERR(ifp)) {
2898 spin_lock_bh(&ifp->lock);
2899 ifp->flags &= ~IFA_F_TENTATIVE;
2900 spin_unlock_bh(&ifp->lock);
2901 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2902 in6_ifa_put(ifp);
2903 }
2904}
2905
Amerigo Wang07a93622012-10-29 16:23:10 +00002906#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002907static void sit_add_v4_addrs(struct inet6_dev *idev)
2908{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002909 struct in6_addr addr;
2910 struct net_device *dev;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09002911 struct net *net = dev_net(idev->dev);
Nicolas Dichtel929c9cf2013-11-14 13:51:05 +01002912 int scope, plen;
Nicolas Dichtelf0e2acf2013-11-14 13:51:06 +01002913 u32 pflags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002914
2915 ASSERT_RTNL();
2916
2917 memset(&addr, 0, sizeof(struct in6_addr));
2918 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2919
2920 if (idev->dev->flags&IFF_POINTOPOINT) {
2921 addr.s6_addr32[0] = htonl(0xfe800000);
2922 scope = IFA_LINK;
Nicolas Dichtel929c9cf2013-11-14 13:51:05 +01002923 plen = 64;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002924 } else {
2925 scope = IPV6_ADDR_COMPATv4;
Nicolas Dichtel929c9cf2013-11-14 13:51:05 +01002926 plen = 96;
Nicolas Dichtelf0e2acf2013-11-14 13:51:06 +01002927 pflags |= RTF_NONEXTHOP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002928 }
2929
2930 if (addr.s6_addr32[3]) {
Nicolas Dichtel929c9cf2013-11-14 13:51:05 +01002931 add_addr(idev, &addr, plen, scope);
Nicolas Dichtelf0e2acf2013-11-14 13:51:06 +01002932 addrconf_prefix_route(&addr, plen, idev->dev, 0, pflags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002933 return;
2934 }
2935
Benjamin Thery6fda7352008-03-05 10:47:47 -08002936 for_each_netdev(net, dev) {
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002937 struct in_device *in_dev = __in_dev_get_rtnl(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002938 if (in_dev && (dev->flags & IFF_UP)) {
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002939 struct in_ifaddr *ifa;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002940
2941 int flag = scope;
2942
2943 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002944
2945 addr.s6_addr32[3] = ifa->ifa_local;
2946
2947 if (ifa->ifa_scope == RT_SCOPE_LINK)
2948 continue;
2949 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2950 if (idev->dev->flags&IFF_POINTOPOINT)
2951 continue;
2952 flag |= IFA_HOST;
2953 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002954
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002955 add_addr(idev, &addr, plen, flag);
Nicolas Dichtelf0e2acf2013-11-14 13:51:06 +01002956 addrconf_prefix_route(&addr, plen, idev->dev, 0,
2957 pflags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002958 }
2959 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002960 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002961}
Joerg Roedel0be669b2006-10-10 14:49:53 -07002962#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002963
2964static void init_loopback(struct net_device *dev)
2965{
2966 struct inet6_dev *idev;
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05302967 struct net_device *sp_dev;
2968 struct inet6_ifaddr *sp_ifa;
2969 struct rt6_info *sp_rt;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002970
2971 /* ::1 */
2972
2973 ASSERT_RTNL();
2974
Ian Morrise5d08d72014-11-23 21:28:43 +00002975 idev = ipv6_find_idev(dev);
Ian Morris63159f22015-03-29 14:00:04 +01002976 if (!idev) {
Joe Perches91df42b2012-05-15 14:11:54 +00002977 pr_debug("%s: add_dev failed\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002978 return;
2979 }
2980
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002981 add_addr(idev, &in6addr_loopback, 128, IFA_HOST);
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05302982
2983 /* Add routes to other interface's IPv6 addresses */
2984 for_each_netdev(dev_net(dev), sp_dev) {
2985 if (!strcmp(sp_dev->name, dev->name))
2986 continue;
2987
2988 idev = __in6_dev_get(sp_dev);
2989 if (!idev)
2990 continue;
2991
2992 read_lock_bh(&idev->lock);
2993 list_for_each_entry(sp_ifa, &idev->addr_list, if_list) {
2994
2995 if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE))
2996 continue;
2997
Gao feng33d99112014-01-24 16:29:11 +08002998 if (sp_ifa->rt) {
2999 /* This dst has been added to garbage list when
3000 * lo device down, release this obsolete dst and
3001 * reallocate a new router for ifa.
3002 */
3003 if (sp_ifa->rt->dst.obsolete > 0) {
3004 ip6_rt_put(sp_ifa->rt);
3005 sp_ifa->rt = NULL;
3006 } else {
3007 continue;
3008 }
3009 }
Gao fenga881ae12013-06-16 11:14:30 +08003010
François-Xavier Le Bail57ec0af2013-12-02 11:28:49 +01003011 sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, false);
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05303012
3013 /* Failure cases are ignored */
Gao feng534c8772013-06-02 22:16:21 +00003014 if (!IS_ERR(sp_rt)) {
3015 sp_ifa->rt = sp_rt;
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05303016 ip6_ins_rt(sp_rt);
Gao feng534c8772013-06-02 22:16:21 +00003017 }
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05303018 }
3019 read_unlock_bh(&idev->lock);
3020 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003021}
3022
Alexander Aring2ad3ed52016-06-15 21:20:17 +02003023void addrconf_add_linklocal(struct inet6_dev *idev,
3024 const struct in6_addr *addr, u32 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003025{
Eldad Zack8e5e8f32012-04-01 07:49:08 +00003026 struct inet6_ifaddr *ifp;
Hannes Frederic Sowa64236f32015-03-23 23:36:02 +01003027 u32 addr_flags = flags | IFA_F_PERMANENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003028
Neil Horman95c385b2007-04-25 17:08:10 -07003029#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3030 if (idev->cnf.optimistic_dad &&
David Miller702beb82008-07-20 18:17:02 -07003031 !dev_net(idev->dev)->ipv6.devconf_all->forwarding)
Neil Horman95c385b2007-04-25 17:08:10 -07003032 addr_flags |= IFA_F_OPTIMISTIC;
3033#endif
3034
Hannes Frederic Sowa07edd742014-01-08 15:43:22 +01003035 ifp = ipv6_add_addr(idev, addr, NULL, 64, IFA_LINK, addr_flags,
3036 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003037 if (!IS_ERR(ifp)) {
YOSHIFUJI Hideaki46d48042007-02-07 20:36:26 +09003038 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
David S. Millercf22f9a2012-04-14 21:37:40 -04003039 addrconf_dad_start(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003040 in6_ifa_put(ifp);
3041 }
3042}
Alexander Aring2ad3ed52016-06-15 21:20:17 +02003043EXPORT_SYMBOL_GPL(addrconf_add_linklocal);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003044
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01003045static bool ipv6_reserved_interfaceid(struct in6_addr address)
3046{
3047 if ((address.s6_addr32[2] | address.s6_addr32[3]) == 0)
3048 return true;
3049
3050 if (address.s6_addr32[2] == htonl(0x02005eff) &&
3051 ((address.s6_addr32[3] & htonl(0xfe000000)) == htonl(0xfe000000)))
3052 return true;
3053
3054 if (address.s6_addr32[2] == htonl(0xfdffffff) &&
3055 ((address.s6_addr32[3] & htonl(0xffffff80)) == htonl(0xffffff80)))
3056 return true;
3057
3058 return false;
3059}
3060
3061static int ipv6_generate_stable_address(struct in6_addr *address,
3062 u8 dad_count,
3063 const struct inet6_dev *idev)
3064{
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01003065 static DEFINE_SPINLOCK(lock);
3066 static __u32 digest[SHA_DIGEST_WORDS];
3067 static __u32 workspace[SHA_WORKSPACE_WORDS];
3068
3069 static union {
3070 char __data[SHA_MESSAGE_BYTES];
3071 struct {
3072 struct in6_addr secret;
Hannes Frederic Sowaff402172015-03-24 11:05:28 +01003073 __be32 prefix[2];
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01003074 unsigned char hwaddr[MAX_ADDR_LEN];
3075 u8 dad_count;
3076 } __packed;
3077 } data;
3078
3079 struct in6_addr secret;
3080 struct in6_addr temp;
3081 struct net *net = dev_net(idev->dev);
3082
3083 BUILD_BUG_ON(sizeof(data.__data) != sizeof(data));
3084
3085 if (idev->cnf.stable_secret.initialized)
3086 secret = idev->cnf.stable_secret.secret;
3087 else if (net->ipv6.devconf_dflt->stable_secret.initialized)
3088 secret = net->ipv6.devconf_dflt->stable_secret.secret;
3089 else
3090 return -1;
3091
3092retry:
3093 spin_lock_bh(&lock);
3094
3095 sha_init(digest);
3096 memset(&data, 0, sizeof(data));
3097 memset(workspace, 0, sizeof(workspace));
3098 memcpy(data.hwaddr, idev->dev->perm_addr, idev->dev->addr_len);
Hannes Frederic Sowaff402172015-03-24 11:05:28 +01003099 data.prefix[0] = address->s6_addr32[0];
3100 data.prefix[1] = address->s6_addr32[1];
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01003101 data.secret = secret;
3102 data.dad_count = dad_count;
3103
3104 sha_transform(digest, data.__data, workspace);
3105
3106 temp = *address;
Hannes Frederic Sowaff402172015-03-24 11:05:28 +01003107 temp.s6_addr32[2] = (__force __be32)digest[0];
3108 temp.s6_addr32[3] = (__force __be32)digest[1];
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01003109
3110 spin_unlock_bh(&lock);
3111
3112 if (ipv6_reserved_interfaceid(temp)) {
3113 dad_count++;
Hannes Frederic Sowa1855b7c2015-03-23 23:36:05 +01003114 if (dad_count > dev_net(idev->dev)->ipv6.sysctl.idgen_retries)
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01003115 return -1;
3116 goto retry;
3117 }
3118
3119 *address = temp;
3120 return 0;
3121}
3122
Bjørn Morkcc9da6c2015-12-16 16:44:38 +01003123static void ipv6_gen_mode_random_init(struct inet6_dev *idev)
3124{
3125 struct ipv6_stable_secret *s = &idev->cnf.stable_secret;
3126
3127 if (s->initialized)
3128 return;
3129 s = &idev->cnf.stable_secret;
3130 get_random_bytes(&s->secret, sizeof(s->secret));
3131 s->initialized = true;
3132}
3133
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02003134static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route)
3135{
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01003136 struct in6_addr addr;
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02003137
David Ahernca254492015-10-12 11:47:10 -07003138 /* no link local addresses on L3 master devices */
3139 if (netif_is_l3_master(idev->dev))
3140 return;
3141
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01003142 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
3143
Bjørn Morkcc9da6c2015-12-16 16:44:38 +01003144 switch (idev->addr_gen_mode) {
3145 case IN6_ADDR_GEN_MODE_RANDOM:
3146 ipv6_gen_mode_random_init(idev);
3147 /* fallthrough */
3148 case IN6_ADDR_GEN_MODE_STABLE_PRIVACY:
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01003149 if (!ipv6_generate_stable_address(&addr, 0, idev))
Hannes Frederic Sowa64236f32015-03-23 23:36:02 +01003150 addrconf_add_linklocal(idev, &addr,
3151 IFA_F_STABLE_PRIVACY);
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01003152 else if (prefix_route)
3153 addrconf_prefix_route(&addr, 64, idev->dev, 0, 0);
Bjørn Morkcc9da6c2015-12-16 16:44:38 +01003154 break;
3155 case IN6_ADDR_GEN_MODE_EUI64:
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02003156 /* addrconf_add_linklocal also adds a prefix_route and we
3157 * only need to care about prefix routes if ipv6_generate_eui64
3158 * couldn't generate one.
3159 */
3160 if (ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) == 0)
Hannes Frederic Sowa64236f32015-03-23 23:36:02 +01003161 addrconf_add_linklocal(idev, &addr, 0);
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02003162 else if (prefix_route)
3163 addrconf_prefix_route(&addr, 64, idev->dev, 0, 0);
Bjørn Morkcc9da6c2015-12-16 16:44:38 +01003164 break;
3165 case IN6_ADDR_GEN_MODE_NONE:
3166 default:
3167 /* will not add any link local address */
3168 break;
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02003169 }
3170}
3171
Linus Torvalds1da177e2005-04-16 15:20:36 -07003172static void addrconf_dev_config(struct net_device *dev)
3173{
Eldad Zack8e5e8f32012-04-01 07:49:08 +00003174 struct inet6_dev *idev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003175
3176 ASSERT_RTNL();
3177
Herbert Xu74235a22007-06-14 13:02:55 -07003178 if ((dev->type != ARPHRD_ETHER) &&
3179 (dev->type != ARPHRD_FDDI) &&
Herbert Xu74235a22007-06-14 13:02:55 -07003180 (dev->type != ARPHRD_ARCNET) &&
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +00003181 (dev->type != ARPHRD_INFINIBAND) &&
Nicolas Dichtele8377352013-08-20 12:16:06 +02003182 (dev->type != ARPHRD_IEEE1394) &&
Jukka Rissanene74bccb2013-12-11 17:05:36 +02003183 (dev->type != ARPHRD_TUNNEL6) &&
Bjørn Morkcc9da6c2015-12-16 16:44:38 +01003184 (dev->type != ARPHRD_6LOWPAN) &&
3185 (dev->type != ARPHRD_NONE)) {
Herbert Xu74235a22007-06-14 13:02:55 -07003186 /* Alas, we support only Ethernet autoconfiguration. */
3187 return;
3188 }
3189
Linus Torvalds1da177e2005-04-16 15:20:36 -07003190 idev = addrconf_add_dev(dev);
Brian Haley64e724f2010-07-20 10:34:30 +00003191 if (IS_ERR(idev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003192 return;
3193
Bjørn Morkcc9da6c2015-12-16 16:44:38 +01003194 /* this device type has no EUI support */
3195 if (dev->type == ARPHRD_NONE &&
3196 idev->addr_gen_mode == IN6_ADDR_GEN_MODE_EUI64)
3197 idev->addr_gen_mode = IN6_ADDR_GEN_MODE_RANDOM;
3198
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02003199 addrconf_addr_gen(idev, false);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003200}
3201
Amerigo Wang07a93622012-10-29 16:23:10 +00003202#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003203static void addrconf_sit_config(struct net_device *dev)
3204{
3205 struct inet6_dev *idev;
3206
3207 ASSERT_RTNL();
3208
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003209 /*
3210 * Configure the tunnel with one of our IPv4
3211 * addresses... we should configure all of
Linus Torvalds1da177e2005-04-16 15:20:36 -07003212 * our v4 addrs in the tunnel
3213 */
3214
Ian Morrise5d08d72014-11-23 21:28:43 +00003215 idev = ipv6_find_idev(dev);
Ian Morris63159f22015-03-29 14:00:04 +01003216 if (!idev) {
Joe Perches91df42b2012-05-15 14:11:54 +00003217 pr_debug("%s: add_dev failed\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003218 return;
3219 }
3220
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11003221 if (dev->priv_flags & IFF_ISATAP) {
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02003222 addrconf_addr_gen(idev, false);
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11003223 return;
3224 }
3225
Linus Torvalds1da177e2005-04-16 15:20:36 -07003226 sit_add_v4_addrs(idev);
3227
Nicolas Dichtel62b54dd2012-10-01 23:19:14 +00003228 if (dev->flags&IFF_POINTOPOINT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003229 addrconf_add_mroute(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003230}
Joerg Roedel0be669b2006-10-10 14:49:53 -07003231#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07003232
Amerigo Wang07a93622012-10-29 16:23:10 +00003233#if IS_ENABLED(CONFIG_NET_IPGRE)
stephen hemmingeraee80b52011-06-08 10:44:30 +00003234static void addrconf_gre_config(struct net_device *dev)
3235{
3236 struct inet6_dev *idev;
stephen hemmingeraee80b52011-06-08 10:44:30 +00003237
stephen hemmingeraee80b52011-06-08 10:44:30 +00003238 ASSERT_RTNL();
3239
Ian Morrise5d08d72014-11-23 21:28:43 +00003240 idev = ipv6_find_idev(dev);
Ian Morris63159f22015-03-29 14:00:04 +01003241 if (!idev) {
Joe Perches91df42b2012-05-15 14:11:54 +00003242 pr_debug("%s: add_dev failed\n", __func__);
stephen hemmingeraee80b52011-06-08 10:44:30 +00003243 return;
3244 }
3245
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02003246 addrconf_addr_gen(idev, true);
Hannes Frederic Sowad9e4ce62015-10-08 18:19:39 +02003247 if (dev->flags & IFF_POINTOPOINT)
3248 addrconf_add_mroute(dev);
stephen hemmingeraee80b52011-06-08 10:44:30 +00003249}
3250#endif
3251
David Ahernf1705ec2016-02-24 09:25:37 -08003252static int fixup_permanent_addr(struct inet6_dev *idev,
3253 struct inet6_ifaddr *ifp)
3254{
3255 if (!ifp->rt) {
3256 struct rt6_info *rt;
3257
3258 rt = addrconf_dst_alloc(idev, &ifp->addr, false);
3259 if (unlikely(IS_ERR(rt)))
3260 return PTR_ERR(rt);
3261
3262 ifp->rt = rt;
3263 }
3264
3265 if (!(ifp->flags & IFA_F_NOPREFIXROUTE)) {
3266 addrconf_prefix_route(&ifp->addr, ifp->prefix_len,
3267 idev->dev, 0, 0);
3268 }
3269
3270 addrconf_dad_start(ifp);
3271
3272 return 0;
3273}
3274
3275static void addrconf_permanent_addr(struct net_device *dev)
3276{
3277 struct inet6_ifaddr *ifp, *tmp;
3278 struct inet6_dev *idev;
3279
3280 idev = __in6_dev_get(dev);
3281 if (!idev)
3282 return;
3283
3284 write_lock_bh(&idev->lock);
3285
3286 list_for_each_entry_safe(ifp, tmp, &idev->addr_list, if_list) {
3287 if ((ifp->flags & IFA_F_PERMANENT) &&
3288 fixup_permanent_addr(idev, ifp) < 0) {
3289 write_unlock_bh(&idev->lock);
3290 ipv6_del_addr(ifp);
3291 write_lock_bh(&idev->lock);
3292
3293 net_info_ratelimited("%s: Failed to add prefix route for address %pI6c; dropping\n",
3294 idev->dev->name, &ifp->addr);
3295 }
3296 }
3297
3298 write_unlock_bh(&idev->lock);
3299}
3300
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003301static int addrconf_notify(struct notifier_block *this, unsigned long event,
Jiri Pirko351638e2013-05-28 01:30:21 +00003302 void *ptr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003303{
Jiri Pirko351638e2013-05-28 01:30:21 +00003304 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
David Ahern4f7f34e2016-04-07 11:10:41 -07003305 struct netdev_notifier_changeupper_info *info;
Eric Dumazet748e2d92012-08-22 21:50:59 +00003306 struct inet6_dev *idev = __in6_dev_get(dev);
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09003307 int run_pending = 0;
Herbert Xub217d612007-07-30 17:04:52 -07003308 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003309
Stephen Hemmingere21e8462010-03-20 16:09:01 -07003310 switch (event) {
YOSHIFUJI Hideaki45ba9dd2007-02-15 02:07:27 +09003311 case NETDEV_REGISTER:
Herbert Xu74235a22007-06-14 13:02:55 -07003312 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
YOSHIFUJI Hideaki45ba9dd2007-02-15 02:07:27 +09003313 idev = ipv6_add_dev(dev);
WANG Conga317a2f2014-07-25 15:25:09 -07003314 if (IS_ERR(idev))
3315 return notifier_from_errno(PTR_ERR(idev));
YOSHIFUJI Hideaki45ba9dd2007-02-15 02:07:27 +09003316 }
3317 break;
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003318
Alexander Duyckb7b0b1d2015-10-26 11:06:33 -07003319 case NETDEV_CHANGEMTU:
3320 /* if MTU under IPV6_MIN_MTU stop IPv6 on this interface. */
3321 if (dev->mtu < IPV6_MIN_MTU) {
3322 addrconf_ifdown(dev, 1);
3323 break;
3324 }
3325
3326 if (idev) {
3327 rt6_mtu_change(dev, dev->mtu);
3328 idev->cnf.mtu6 = dev->mtu;
3329 break;
3330 }
3331
3332 /* allocate new idev */
3333 idev = ipv6_add_dev(dev);
3334 if (IS_ERR(idev))
3335 break;
3336
3337 /* device is still not ready */
3338 if (!(idev->if_flags & IF_READY))
3339 break;
3340
3341 run_pending = 1;
3342
3343 /* fall through */
3344
Linus Torvalds1da177e2005-04-16 15:20:36 -07003345 case NETDEV_UP:
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003346 case NETDEV_CHANGE:
Jay Vosburghc2edacf2007-07-09 10:42:47 -07003347 if (dev->flags & IFF_SLAVE)
3348 break;
3349
WANG Cong3ce62a82014-09-11 15:07:16 -07003350 if (idev && idev->cnf.disable_ipv6)
3351 break;
3352
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003353 if (event == NETDEV_UP) {
David Ahern38bd10c2016-04-21 20:56:12 -07003354 /* restore routes for permanent addresses */
3355 addrconf_permanent_addr(dev);
3356
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -07003357 if (!addrconf_qdisc_ok(dev)) {
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003358 /* device is not ready yet. */
Joe Perchesf3213832012-05-15 14:11:53 +00003359 pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n",
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003360 dev->name);
3361 break;
3362 }
Kristian Slavov99081042006-02-08 16:10:53 -08003363
Evgeniy Polyakovd31c7b82007-11-30 23:36:08 +11003364 if (!idev && dev->mtu >= IPV6_MIN_MTU)
3365 idev = ipv6_add_dev(dev);
3366
WANG Conga317a2f2014-07-25 15:25:09 -07003367 if (!IS_ERR_OR_NULL(idev)) {
Kristian Slavov99081042006-02-08 16:10:53 -08003368 idev->if_flags |= IF_READY;
Benjamin Therye3ec6cf2008-11-05 01:43:57 -08003369 run_pending = 1;
3370 }
Alexander Duyckb7b0b1d2015-10-26 11:06:33 -07003371 } else if (event == NETDEV_CHANGE) {
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -07003372 if (!addrconf_qdisc_ok(dev)) {
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003373 /* device is still not ready. */
3374 break;
3375 }
3376
3377 if (idev) {
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003378 if (idev->if_flags & IF_READY)
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003379 /* device is already configured. */
3380 break;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003381 idev->if_flags |= IF_READY;
3382 }
3383
Joe Perchesf3213832012-05-15 14:11:53 +00003384 pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n",
3385 dev->name);
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003386
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09003387 run_pending = 1;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003388 }
3389
Stephen Hemmingere21e8462010-03-20 16:09:01 -07003390 switch (dev->type) {
Amerigo Wang07a93622012-10-29 16:23:10 +00003391#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003392 case ARPHRD_SIT:
3393 addrconf_sit_config(dev);
3394 break;
Joerg Roedel0be669b2006-10-10 14:49:53 -07003395#endif
Amerigo Wang07a93622012-10-29 16:23:10 +00003396#if IS_ENABLED(CONFIG_NET_IPGRE)
stephen hemmingeraee80b52011-06-08 10:44:30 +00003397 case ARPHRD_IPGRE:
3398 addrconf_gre_config(dev);
3399 break;
3400#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07003401 case ARPHRD_LOOPBACK:
3402 init_loopback(dev);
3403 break;
3404
3405 default:
3406 addrconf_dev_config(dev);
3407 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07003408 }
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003409
WANG Conga317a2f2014-07-25 15:25:09 -07003410 if (!IS_ERR_OR_NULL(idev)) {
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09003411 if (run_pending)
3412 addrconf_dad_run(idev);
3413
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003414 /*
3415 * If the MTU changed during the interface down,
3416 * when the interface up, the changed MTU must be
3417 * reflected in the idev as well as routers.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003418 */
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003419 if (idev->cnf.mtu6 != dev->mtu &&
3420 dev->mtu >= IPV6_MIN_MTU) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003421 rt6_mtu_change(dev, dev->mtu);
3422 idev->cnf.mtu6 = dev->mtu;
3423 }
3424 idev->tstamp = jiffies;
3425 inet6_ifinfo_notify(RTM_NEWLINK, idev);
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003426
3427 /*
3428 * If the changed mtu during down is lower than
3429 * IPV6_MIN_MTU stop IPv6 on this interface.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003430 */
3431 if (dev->mtu < IPV6_MIN_MTU)
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003432 addrconf_ifdown(dev, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003433 }
3434 break;
3435
Linus Torvalds1da177e2005-04-16 15:20:36 -07003436 case NETDEV_DOWN:
3437 case NETDEV_UNREGISTER:
3438 /*
3439 * Remove all addresses from this interface.
3440 */
3441 addrconf_ifdown(dev, event != NETDEV_DOWN);
3442 break;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003443
Linus Torvalds1da177e2005-04-16 15:20:36 -07003444 case NETDEV_CHANGENAME:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003445 if (idev) {
Stephen Hemminger5632c512007-04-28 21:16:39 -07003446 snmp6_unregister_dev(idev);
Pavel Emelyanov408c4762008-01-10 17:41:21 -08003447 addrconf_sysctl_unregister(idev);
WANG Conga317a2f2014-07-25 15:25:09 -07003448 err = addrconf_sysctl_register(idev);
Herbert Xub217d612007-07-30 17:04:52 -07003449 if (err)
3450 return notifier_from_errno(err);
WANG Conga317a2f2014-07-25 15:25:09 -07003451 err = snmp6_register_dev(idev);
3452 if (err) {
3453 addrconf_sysctl_unregister(idev);
3454 return notifier_from_errno(err);
3455 }
Stephen Hemminger5632c512007-04-28 21:16:39 -07003456 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003457 break;
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003458
Jiri Pirko93d9b7d2010-03-10 10:28:56 +00003459 case NETDEV_PRE_TYPE_CHANGE:
3460 case NETDEV_POST_TYPE_CHANGE:
Andrew Lunn3ef09522015-12-03 21:12:32 +01003461 if (idev)
3462 addrconf_type_change(dev, event);
Moni Shoua75c78502009-09-15 02:37:40 -07003463 break;
David Ahern4f7f34e2016-04-07 11:10:41 -07003464
3465 case NETDEV_CHANGEUPPER:
3466 info = ptr;
3467
3468 /* flush all routes if dev is linked to or unlinked from
3469 * an L3 master device (e.g., VRF)
3470 */
3471 if (info->upper_dev && netif_is_l3_master(info->upper_dev))
3472 addrconf_ifdown(dev, 0);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07003473 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003474
3475 return NOTIFY_OK;
3476}
3477
3478/*
3479 * addrconf module should be notified of a device going up
3480 */
3481static struct notifier_block ipv6_dev_notf = {
3482 .notifier_call = addrconf_notify,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003483};
3484
Jiri Pirko93d9b7d2010-03-10 10:28:56 +00003485static void addrconf_type_change(struct net_device *dev, unsigned long event)
Moni Shoua75c78502009-09-15 02:37:40 -07003486{
3487 struct inet6_dev *idev;
3488 ASSERT_RTNL();
3489
3490 idev = __in6_dev_get(dev);
3491
Jiri Pirko93d9b7d2010-03-10 10:28:56 +00003492 if (event == NETDEV_POST_TYPE_CHANGE)
Moni Shoua75c78502009-09-15 02:37:40 -07003493 ipv6_mc_remap(idev);
Jiri Pirko93d9b7d2010-03-10 10:28:56 +00003494 else if (event == NETDEV_PRE_TYPE_CHANGE)
Moni Shoua75c78502009-09-15 02:37:40 -07003495 ipv6_mc_unmap(idev);
3496}
3497
David Ahern70af9212016-04-08 12:01:21 -07003498static bool addr_is_local(const struct in6_addr *addr)
3499{
3500 return ipv6_addr_type(addr) &
3501 (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_LOOPBACK);
3502}
3503
Linus Torvalds1da177e2005-04-16 15:20:36 -07003504static int addrconf_ifdown(struct net_device *dev, int how)
3505{
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09003506 struct net *net = dev_net(dev);
stephen hemminger502a2ff2010-03-17 20:31:13 +00003507 struct inet6_dev *idev;
David Ahernf1705ec2016-02-24 09:25:37 -08003508 struct inet6_ifaddr *ifa, *tmp;
3509 struct list_head del_list;
3510 int _keep_addr;
3511 bool keep_addr;
David S. Miller73a8bd72011-01-23 23:27:15 -08003512 int state, i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003513
3514 ASSERT_RTNL();
3515
David S. Miller73a8bd72011-01-23 23:27:15 -08003516 rt6_ifdown(net, dev);
3517 neigh_ifdown(&nd_tbl, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003518
3519 idev = __in6_dev_get(dev);
Ian Morris63159f22015-03-29 14:00:04 +01003520 if (!idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003521 return -ENODEV;
3522
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003523 /*
3524 * Step 1: remove reference to ipv6 device from parent device.
3525 * Do not dev_put!
Linus Torvalds1da177e2005-04-16 15:20:36 -07003526 */
Denis V. Lunev439e2382008-04-03 13:30:17 -07003527 if (how) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003528 idev->dead = 1;
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07003529
3530 /* protected by rtnl_lock */
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +00003531 RCU_INIT_POINTER(dev->ip6_ptr, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003532
3533 /* Step 1.5: remove snmp6 entry */
3534 snmp6_unregister_dev(idev);
3535
3536 }
3537
David Ahernf1705ec2016-02-24 09:25:37 -08003538 /* aggregate the system setting and interface setting */
3539 _keep_addr = net->ipv6.devconf_all->keep_addr_on_down;
3540 if (!_keep_addr)
3541 _keep_addr = idev->cnf.keep_addr_on_down;
3542
3543 /* combine the user config with event to determine if permanent
3544 * addresses are to be removed from address hash table
3545 */
Mike Manningbc561632016-08-12 12:02:38 +01003546 keep_addr = !(how || _keep_addr <= 0 || idev->cnf.disable_ipv6);
David Ahernf1705ec2016-02-24 09:25:37 -08003547
David S. Miller73a8bd72011-01-23 23:27:15 -08003548 /* Step 2: clear hash table */
3549 for (i = 0; i < IN6_ADDR_HSIZE; i++) {
3550 struct hlist_head *h = &inet6_addr_lst[i];
David S. Miller73a8bd72011-01-23 23:27:15 -08003551
3552 spin_lock_bh(&addrconf_hash_lock);
Ian Morris67ba4152014-08-24 21:53:10 +01003553restart:
Sasha Levinb67bfe02013-02-27 17:06:00 -08003554 hlist_for_each_entry_rcu(ifa, h, addr_lst) {
David S. Miller73a8bd72011-01-23 23:27:15 -08003555 if (ifa->idev == idev) {
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003556 addrconf_del_dad_work(ifa);
David Ahernf1705ec2016-02-24 09:25:37 -08003557 /* combined flag + permanent flag decide if
3558 * address is retained on a down event
3559 */
3560 if (!keep_addr ||
David Ahern70af9212016-04-08 12:01:21 -07003561 !(ifa->flags & IFA_F_PERMANENT) ||
3562 addr_is_local(&ifa->addr)) {
David Ahernf1705ec2016-02-24 09:25:37 -08003563 hlist_del_init_rcu(&ifa->addr_lst);
3564 goto restart;
3565 }
David S. Miller73a8bd72011-01-23 23:27:15 -08003566 }
3567 }
3568 spin_unlock_bh(&addrconf_hash_lock);
3569 }
3570
Linus Torvalds1da177e2005-04-16 15:20:36 -07003571 write_lock_bh(&idev->lock);
3572
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003573 addrconf_del_rs_timer(idev);
3574
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003575 /* Step 2: clear flags for stateless addrconf */
Denis V. Lunev439e2382008-04-03 13:30:17 -07003576 if (!how)
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003577 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003578
Denis V. Lunev439e2382008-04-03 13:30:17 -07003579 if (how && del_timer(&idev->regen_timer))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003580 in6_dev_put(idev);
3581
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003582 /* Step 3: clear tempaddr list */
stephen hemminger372e6c82010-03-17 20:31:09 +00003583 while (!list_empty(&idev->tempaddr_list)) {
3584 ifa = list_first_entry(&idev->tempaddr_list,
3585 struct inet6_ifaddr, tmp_list);
3586 list_del(&ifa->tmp_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003587 write_unlock_bh(&idev->lock);
3588 spin_lock_bh(&ifa->lock);
3589
3590 if (ifa->ifpub) {
3591 in6_ifa_put(ifa->ifpub);
3592 ifa->ifpub = NULL;
3593 }
3594 spin_unlock_bh(&ifa->lock);
3595 in6_ifa_put(ifa);
3596 write_lock_bh(&idev->lock);
3597 }
stephen hemminger8f37ada2010-03-03 08:19:59 +00003598
David Ahernf1705ec2016-02-24 09:25:37 -08003599 /* re-combine the user config with event to determine if permanent
3600 * addresses are to be removed from the interface list
3601 */
Mike Manningbc561632016-08-12 12:02:38 +01003602 keep_addr = (!how && _keep_addr > 0 && !idev->cnf.disable_ipv6);
David Ahernf1705ec2016-02-24 09:25:37 -08003603
3604 INIT_LIST_HEAD(&del_list);
3605 list_for_each_entry_safe(ifa, tmp, &idev->addr_list, if_list) {
David Ahern38bd10c2016-04-21 20:56:12 -07003606 struct rt6_info *rt = NULL;
3607
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003608 addrconf_del_dad_work(ifa);
stephen hemminger84e8b802010-03-02 13:32:46 +00003609
David S. Miller73a8bd72011-01-23 23:27:15 -08003610 write_unlock_bh(&idev->lock);
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01003611 spin_lock_bh(&ifa->lock);
David Ahernf1705ec2016-02-24 09:25:37 -08003612
David Ahern70af9212016-04-08 12:01:21 -07003613 if (keep_addr && (ifa->flags & IFA_F_PERMANENT) &&
3614 !addr_is_local(&ifa->addr)) {
David Ahernf1705ec2016-02-24 09:25:37 -08003615 /* set state to skip the notifier below */
3616 state = INET6_IFADDR_STATE_DEAD;
3617 ifa->state = 0;
3618 if (!(ifa->flags & IFA_F_NODAD))
3619 ifa->flags |= IFA_F_TENTATIVE;
David Ahern38bd10c2016-04-21 20:56:12 -07003620
3621 rt = ifa->rt;
3622 ifa->rt = NULL;
David Ahernf1705ec2016-02-24 09:25:37 -08003623 } else {
3624 state = ifa->state;
3625 ifa->state = INET6_IFADDR_STATE_DEAD;
3626
Wei Yongjunc8822192016-07-28 16:19:03 +00003627 list_move(&ifa->if_list, &del_list);
David Ahernf1705ec2016-02-24 09:25:37 -08003628 }
3629
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01003630 spin_unlock_bh(&ifa->lock);
stephen hemminger84e8b802010-03-02 13:32:46 +00003631
David Ahern38bd10c2016-04-21 20:56:12 -07003632 if (rt)
3633 ip6_del_rt(rt);
3634
David S. Miller73a8bd72011-01-23 23:27:15 -08003635 if (state != INET6_IFADDR_STATE_DEAD) {
3636 __ipv6_ifa_notify(RTM_DELADDR, ifa);
Cong Wangf88c91d2013-04-14 23:18:43 +08003637 inet6addr_notifier_call_chain(NETDEV_DOWN, ifa);
Mike Manningea06f712016-07-22 18:32:11 +01003638 } else {
3639 if (idev->cnf.forwarding)
3640 addrconf_leave_anycast(ifa);
3641 addrconf_leave_solict(ifa->idev, &ifa->addr);
stephen hemminger27bdb2a2010-04-12 05:41:32 +00003642 }
stephen hemminger8f37ada2010-03-03 08:19:59 +00003643
David S. Miller73a8bd72011-01-23 23:27:15 -08003644 write_lock_bh(&idev->lock);
3645 }
stephen hemminger8f37ada2010-03-03 08:19:59 +00003646
Linus Torvalds1da177e2005-04-16 15:20:36 -07003647 write_unlock_bh(&idev->lock);
3648
David Ahernf1705ec2016-02-24 09:25:37 -08003649 /* now clean up addresses to be removed */
3650 while (!list_empty(&del_list)) {
3651 ifa = list_first_entry(&del_list,
3652 struct inet6_ifaddr, if_list);
3653 list_del(&ifa->if_list);
3654
3655 in6_ifa_put(ifa);
3656 }
3657
Sabrina Dubroca381f4dc2014-09-10 23:23:02 +02003658 /* Step 5: Discard anycast and multicast list */
3659 if (how) {
3660 ipv6_ac_destroy_dev(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003661 ipv6_mc_destroy_dev(idev);
Sabrina Dubroca381f4dc2014-09-10 23:23:02 +02003662 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003663 ipv6_mc_down(idev);
Sabrina Dubroca381f4dc2014-09-10 23:23:02 +02003664 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003665
Linus Torvalds1da177e2005-04-16 15:20:36 -07003666 idev->tstamp = jiffies;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003667
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003668 /* Last: Shot the device (if unregistered) */
Denis V. Lunev439e2382008-04-03 13:30:17 -07003669 if (how) {
Pavel Emelyanov408c4762008-01-10 17:41:21 -08003670 addrconf_sysctl_unregister(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003671 neigh_parms_release(&nd_tbl, idev->nd_parms);
3672 neigh_ifdown(&nd_tbl, dev);
3673 in6_dev_put(idev);
3674 }
3675 return 0;
3676}
3677
3678static void addrconf_rs_timer(unsigned long data)
3679{
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003680 struct inet6_dev *idev = (struct inet6_dev *)data;
Cong Wangcaf92bc2013-08-31 13:44:32 +08003681 struct net_device *dev = idev->dev;
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003682 struct in6_addr lladdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003683
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003684 write_lock(&idev->lock);
stephen hemminger5b2a1952010-03-02 13:32:45 +00003685 if (idev->dead || !(idev->if_flags & IF_READY))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003686 goto out;
3687
Shmulik Ladkani9ba2add2012-12-02 01:44:53 +00003688 if (!ipv6_accept_ra(idev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003689 goto out;
stephen hemminger5b2a1952010-03-02 13:32:45 +00003690
3691 /* Announcement received after solicitation was sent */
3692 if (idev->if_flags & IF_RA_RCVD)
3693 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003694
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003695 if (idev->rs_probes++ < idev->cnf.rtr_solicits) {
Cong Wangcaf92bc2013-08-31 13:44:32 +08003696 write_unlock(&idev->lock);
3697 if (!ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE))
3698 ndisc_send_rs(dev, &lladdr,
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003699 &in6addr_linklocal_allrouters);
3700 else
Cong Wangcaf92bc2013-08-31 13:44:32 +08003701 goto put;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003702
Cong Wangcaf92bc2013-08-31 13:44:32 +08003703 write_lock(&idev->lock);
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003704 /* The wait after the last probe can be shorter */
3705 addrconf_mod_rs_timer(idev, (idev->rs_probes ==
3706 idev->cnf.rtr_solicits) ?
3707 idev->cnf.rtr_solicit_delay :
3708 idev->cnf.rtr_solicit_interval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003709 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003710 /*
3711 * Note: we do not support deprecated "all on-link"
3712 * assumption any longer.
3713 */
Joe Perches91df42b2012-05-15 14:11:54 +00003714 pr_debug("%s: no IPv6 routers present\n", idev->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003715 }
3716
3717out:
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003718 write_unlock(&idev->lock);
Cong Wangcaf92bc2013-08-31 13:44:32 +08003719put:
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003720 in6_dev_put(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003721}
3722
3723/*
3724 * Duplicate Address Detection
3725 */
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003726static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
3727{
3728 unsigned long rand_num;
3729 struct inet6_dev *idev = ifp->idev;
3730
Neil Horman95c385b2007-04-25 17:08:10 -07003731 if (ifp->flags & IFA_F_OPTIMISTIC)
3732 rand_num = 0;
3733 else
Aruna-Hewapathirane63862b52014-01-11 07:15:59 -05003734 rand_num = prandom_u32() % (idev->cnf.rtr_solicit_delay ? : 1);
Neil Horman95c385b2007-04-25 17:08:10 -07003735
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003736 ifp->dad_probes = idev->cnf.dad_transmits;
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003737 addrconf_mod_dad_work(ifp, rand_num);
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003738}
3739
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003740static void addrconf_dad_begin(struct inet6_ifaddr *ifp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003741{
3742 struct inet6_dev *idev = ifp->idev;
3743 struct net_device *dev = idev->dev;
subashab@codeaurora.org16186a82016-02-02 02:11:10 +00003744 bool notify = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003745
3746 addrconf_join_solict(dev, &ifp->addr);
3747
Aruna-Hewapathirane63862b52014-01-11 07:15:59 -05003748 prandom_seed((__force u32) ifp->addr.s6_addr32[3]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003749
3750 read_lock_bh(&idev->lock);
Herbert Xu622ccdf2010-05-18 15:56:06 -07003751 spin_lock(&ifp->lock);
Herbert Xue9d3e082010-05-18 15:36:06 -07003752 if (ifp->state == INET6_IFADDR_STATE_DEAD)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003753 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003754
3755 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09003756 idev->cnf.accept_dad < 1 ||
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003757 !(ifp->flags&IFA_F_TENTATIVE) ||
3758 ifp->flags & IFA_F_NODAD) {
Brian Haleycc411d02009-09-09 14:41:32 +00003759 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED);
stephen hemminger21809fa2010-02-08 19:48:52 +00003760 spin_unlock(&ifp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003761 read_unlock_bh(&idev->lock);
3762
3763 addrconf_dad_completed(ifp);
3764 return;
3765 }
3766
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08003767 if (!(idev->if_flags & IF_READY)) {
stephen hemminger21809fa2010-02-08 19:48:52 +00003768 spin_unlock(&ifp->lock);
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08003769 read_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003770 /*
Masatake YAMATO590a9882009-06-09 10:41:12 +09003771 * If the device is not ready:
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003772 * - keep it tentative if it is a permanent address.
3773 * - otherwise, kill it.
3774 */
3775 in6_ifa_hold(ifp);
Brian Haleycc411d02009-09-09 14:41:32 +00003776 addrconf_dad_stop(ifp, 0);
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08003777 return;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003778 }
Neil Horman95c385b2007-04-25 17:08:10 -07003779
3780 /*
3781 * Optimistic nodes can start receiving
3782 * Frames right away
3783 */
Erik Kline7fd25612014-10-28 18:11:14 +09003784 if (ifp->flags & IFA_F_OPTIMISTIC) {
Neil Horman95c385b2007-04-25 17:08:10 -07003785 ip6_ins_rt(ifp->rt);
Erik Kline7fd25612014-10-28 18:11:14 +09003786 if (ipv6_use_optimistic_addr(idev)) {
3787 /* Because optimistic nodes can use this address,
3788 * notify listeners. If DAD fails, RTM_DELADDR is sent.
3789 */
subashab@codeaurora.org16186a82016-02-02 02:11:10 +00003790 notify = true;
Erik Kline7fd25612014-10-28 18:11:14 +09003791 }
3792 }
Neil Horman95c385b2007-04-25 17:08:10 -07003793
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08003794 addrconf_dad_kick(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003795out:
Herbert Xu622ccdf2010-05-18 15:56:06 -07003796 spin_unlock(&ifp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003797 read_unlock_bh(&idev->lock);
subashab@codeaurora.org16186a82016-02-02 02:11:10 +00003798 if (notify)
3799 ipv6_ifa_notify(RTM_NEWADDR, ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003800}
3801
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003802static void addrconf_dad_start(struct inet6_ifaddr *ifp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003803{
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003804 bool begin_dad = false;
3805
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01003806 spin_lock_bh(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003807 if (ifp->state != INET6_IFADDR_STATE_DEAD) {
3808 ifp->state = INET6_IFADDR_STATE_PREDAD;
3809 begin_dad = true;
3810 }
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01003811 spin_unlock_bh(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003812
3813 if (begin_dad)
3814 addrconf_mod_dad_work(ifp, 0);
3815}
3816
3817static void addrconf_dad_work(struct work_struct *w)
3818{
3819 struct inet6_ifaddr *ifp = container_of(to_delayed_work(w),
3820 struct inet6_ifaddr,
3821 dad_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003822 struct inet6_dev *idev = ifp->idev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003823 struct in6_addr mcaddr;
3824
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003825 enum {
3826 DAD_PROCESS,
3827 DAD_BEGIN,
3828 DAD_ABORT,
3829 } action = DAD_PROCESS;
3830
3831 rtnl_lock();
3832
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01003833 spin_lock_bh(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003834 if (ifp->state == INET6_IFADDR_STATE_PREDAD) {
3835 action = DAD_BEGIN;
3836 ifp->state = INET6_IFADDR_STATE_DAD;
3837 } else if (ifp->state == INET6_IFADDR_STATE_ERRDAD) {
3838 action = DAD_ABORT;
3839 ifp->state = INET6_IFADDR_STATE_POSTDAD;
3840 }
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01003841 spin_unlock_bh(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003842
3843 if (action == DAD_BEGIN) {
3844 addrconf_dad_begin(ifp);
3845 goto out;
3846 } else if (action == DAD_ABORT) {
3847 addrconf_dad_stop(ifp, 1);
3848 goto out;
3849 }
3850
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003851 if (!ifp->dad_probes && addrconf_dad_end(ifp))
Herbert Xuf2344a12010-05-18 15:55:27 -07003852 goto out;
3853
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003854 write_lock_bh(&idev->lock);
stephen hemminger122e4512010-03-02 13:32:44 +00003855 if (idev->dead || !(idev->if_flags & IF_READY)) {
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003856 write_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003857 goto out;
3858 }
stephen hemminger21809fa2010-02-08 19:48:52 +00003859
3860 spin_lock(&ifp->lock);
Herbert Xu622ccdf2010-05-18 15:56:06 -07003861 if (ifp->state == INET6_IFADDR_STATE_DEAD) {
3862 spin_unlock(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003863 write_unlock_bh(&idev->lock);
Herbert Xu622ccdf2010-05-18 15:56:06 -07003864 goto out;
3865 }
3866
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003867 if (ifp->dad_probes == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003868 /*
3869 * DAD was successful
3870 */
3871
Brian Haleycc411d02009-09-09 14:41:32 +00003872 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED);
stephen hemminger21809fa2010-02-08 19:48:52 +00003873 spin_unlock(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003874 write_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003875
3876 addrconf_dad_completed(ifp);
3877
3878 goto out;
3879 }
3880
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003881 ifp->dad_probes--;
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003882 addrconf_mod_dad_work(ifp,
3883 NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME));
stephen hemminger21809fa2010-02-08 19:48:52 +00003884 spin_unlock(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003885 write_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003886
3887 /* send a neighbour solicitation for our addr */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003888 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
Nicolas Dichtel304d8882015-11-27 18:17:05 +01003889 ndisc_send_ns(ifp->idev->dev, &ifp->addr, &mcaddr, &in6addr_any);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003890out:
3891 in6_ifa_put(ifp);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003892 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003893}
3894
Hannes Frederic Sowa11ffff72014-01-16 20:13:04 +01003895/* ifp->idev must be at least read locked */
3896static bool ipv6_lonely_lladdr(struct inet6_ifaddr *ifp)
3897{
3898 struct inet6_ifaddr *ifpiter;
3899 struct inet6_dev *idev = ifp->idev;
3900
Hannes Frederic Sowa602582c2014-01-19 21:58:19 +01003901 list_for_each_entry_reverse(ifpiter, &idev->addr_list, if_list) {
3902 if (ifpiter->scope > IFA_LINK)
3903 break;
Hannes Frederic Sowa11ffff72014-01-16 20:13:04 +01003904 if (ifp != ifpiter && ifpiter->scope == IFA_LINK &&
3905 (ifpiter->flags & (IFA_F_PERMANENT|IFA_F_TENTATIVE|
3906 IFA_F_OPTIMISTIC|IFA_F_DADFAILED)) ==
3907 IFA_F_PERMANENT)
3908 return false;
3909 }
3910 return true;
3911}
3912
Linus Torvalds1da177e2005-04-16 15:20:36 -07003913static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
3914{
Stephen Hemmingere21e8462010-03-20 16:09:01 -07003915 struct net_device *dev = ifp->idev->dev;
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003916 struct in6_addr lladdr;
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02003917 bool send_rs, send_mld;
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003918
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003919 addrconf_del_dad_work(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003920
3921 /*
3922 * Configure the address for reception. Now it is valid.
3923 */
3924
3925 ipv6_ifa_notify(RTM_NEWADDR, ifp);
3926
Tore Anderson026359b2011-08-28 23:47:33 +00003927 /* If added prefix is link local and we are prepared to process
3928 router advertisements, start sending router solicitations.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003929 */
3930
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02003931 read_lock_bh(&ifp->idev->lock);
Hannes Frederic Sowa11ffff72014-01-16 20:13:04 +01003932 send_mld = ifp->scope == IFA_LINK && ipv6_lonely_lladdr(ifp);
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02003933 send_rs = send_mld &&
3934 ipv6_accept_ra(ifp->idev) &&
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02003935 ifp->idev->cnf.rtr_solicits > 0 &&
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02003936 (dev->flags&IFF_LOOPBACK) == 0;
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02003937 read_unlock_bh(&ifp->idev->lock);
3938
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02003939 /* While dad is in progress mld report's source address is in6_addrany.
3940 * Resend with proper ll now.
3941 */
3942 if (send_mld)
3943 ipv6_mc_dad_complete(ifp->idev);
3944
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02003945 if (send_rs) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003946 /*
3947 * If a host as already performed a random delay
3948 * [...] as part of DAD [...] there is no need
3949 * to delay again before sending the first RS
3950 */
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02003951 if (ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE))
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003952 return;
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02003953 ndisc_send_rs(dev, &lladdr, &in6addr_linklocal_allrouters);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003954
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003955 write_lock_bh(&ifp->idev->lock);
3956 spin_lock(&ifp->lock);
3957 ifp->idev->rs_probes = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003958 ifp->idev->if_flags |= IF_RS_SENT;
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003959 addrconf_mod_rs_timer(ifp->idev,
3960 ifp->idev->cnf.rtr_solicit_interval);
3961 spin_unlock(&ifp->lock);
3962 write_unlock_bh(&ifp->idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003963 }
3964}
3965
Stephen Hemmingere21e8462010-03-20 16:09:01 -07003966static void addrconf_dad_run(struct inet6_dev *idev)
3967{
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09003968 struct inet6_ifaddr *ifp;
3969
3970 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00003971 list_for_each_entry(ifp, &idev->addr_list, if_list) {
stephen hemminger21809fa2010-02-08 19:48:52 +00003972 spin_lock(&ifp->lock);
Herbert Xuf2344a12010-05-18 15:55:27 -07003973 if (ifp->flags & IFA_F_TENTATIVE &&
3974 ifp->state == INET6_IFADDR_STATE_DAD)
3975 addrconf_dad_kick(ifp);
stephen hemminger21809fa2010-02-08 19:48:52 +00003976 spin_unlock(&ifp->lock);
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09003977 }
3978 read_unlock_bh(&idev->lock);
3979}
3980
Linus Torvalds1da177e2005-04-16 15:20:36 -07003981#ifdef CONFIG_PROC_FS
3982struct if6_iter_state {
Daniel Lezcano3c400902008-01-10 22:42:49 -08003983 struct seq_net_private p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003984 int bucket;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003985 int offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003986};
3987
Mihai Maruseac1d578302012-01-03 23:31:35 +00003988static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003989{
3990 struct inet6_ifaddr *ifa = NULL;
3991 struct if6_iter_state *state = seq->private;
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +09003992 struct net *net = seq_file_net(seq);
Mihai Maruseac1d578302012-01-03 23:31:35 +00003993 int p = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003994
Mihai Maruseac1d578302012-01-03 23:31:35 +00003995 /* initial bucket if pos is 0 */
3996 if (pos == 0) {
3997 state->bucket = 0;
3998 state->offset = 0;
3999 }
4000
4001 for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
Sasha Levinb67bfe02013-02-27 17:06:00 -08004002 hlist_for_each_entry_rcu_bh(ifa, &inet6_addr_lst[state->bucket],
Mihai Maruseac1d578302012-01-03 23:31:35 +00004003 addr_lst) {
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00004004 if (!net_eq(dev_net(ifa->idev->dev), net))
4005 continue;
Mihai Maruseac1d578302012-01-03 23:31:35 +00004006 /* sync with offset */
4007 if (p < state->offset) {
4008 p++;
4009 continue;
4010 }
4011 state->offset++;
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00004012 return ifa;
Mihai Maruseac1d578302012-01-03 23:31:35 +00004013 }
4014
4015 /* prepare for next bucket */
4016 state->offset = 0;
4017 p = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004018 }
stephen hemmingerc2e21292010-03-17 20:31:10 +00004019 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004020}
4021
stephen hemmingerc2e21292010-03-17 20:31:10 +00004022static struct inet6_ifaddr *if6_get_next(struct seq_file *seq,
4023 struct inet6_ifaddr *ifa)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004024{
4025 struct if6_iter_state *state = seq->private;
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +09004026 struct net *net = seq_file_net(seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004027
Sasha Levinb67bfe02013-02-27 17:06:00 -08004028 hlist_for_each_entry_continue_rcu_bh(ifa, addr_lst) {
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00004029 if (!net_eq(dev_net(ifa->idev->dev), net))
4030 continue;
Mihai Maruseac1d578302012-01-03 23:31:35 +00004031 state->offset++;
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00004032 return ifa;
Mihai Maruseac1d578302012-01-03 23:31:35 +00004033 }
stephen hemmingerc2e21292010-03-17 20:31:10 +00004034
4035 while (++state->bucket < IN6_ADDR_HSIZE) {
Mihai Maruseac1d578302012-01-03 23:31:35 +00004036 state->offset = 0;
Sasha Levinb67bfe02013-02-27 17:06:00 -08004037 hlist_for_each_entry_rcu_bh(ifa,
stephen hemmingerc2e21292010-03-17 20:31:10 +00004038 &inet6_addr_lst[state->bucket], addr_lst) {
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00004039 if (!net_eq(dev_net(ifa->idev->dev), net))
4040 continue;
Mihai Maruseac1d578302012-01-03 23:31:35 +00004041 state->offset++;
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00004042 return ifa;
Daniel Lezcano3c400902008-01-10 22:42:49 -08004043 }
4044 }
4045
stephen hemmingerc2e21292010-03-17 20:31:10 +00004046 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004047}
4048
Linus Torvalds1da177e2005-04-16 15:20:36 -07004049static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
Eric Dumazet4f70ecc2010-05-03 10:50:14 +00004050 __acquires(rcu_bh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004051{
stephen hemminger5c578aed2010-03-17 20:31:11 +00004052 rcu_read_lock_bh();
Mihai Maruseac1d578302012-01-03 23:31:35 +00004053 return if6_get_first(seq, *pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004054}
4055
4056static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
4057{
4058 struct inet6_ifaddr *ifa;
4059
4060 ifa = if6_get_next(seq, v);
4061 ++*pos;
4062 return ifa;
4063}
4064
4065static void if6_seq_stop(struct seq_file *seq, void *v)
Eric Dumazet4f70ecc2010-05-03 10:50:14 +00004066 __releases(rcu_bh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004067{
stephen hemminger5c578aed2010-03-17 20:31:11 +00004068 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004069}
4070
4071static int if6_seq_show(struct seq_file *seq, void *v)
4072{
4073 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
Jiri Pirko971a3512013-12-10 13:56:29 +01004074 seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n",
Harvey Harrisonb0711952008-10-28 16:05:40 -07004075 &ifp->addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004076 ifp->idev->dev->ifindex,
4077 ifp->prefix_len,
4078 ifp->scope,
Jiri Pirko971a3512013-12-10 13:56:29 +01004079 (u8) ifp->flags,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004080 ifp->idev->dev->name);
4081 return 0;
4082}
4083
Philippe De Muyter56b3d972007-07-10 23:07:31 -07004084static const struct seq_operations if6_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004085 .start = if6_seq_start,
4086 .next = if6_seq_next,
4087 .show = if6_seq_show,
4088 .stop = if6_seq_stop,
4089};
4090
4091static int if6_seq_open(struct inode *inode, struct file *file)
4092{
Daniel Lezcano3c400902008-01-10 22:42:49 -08004093 return seq_open_net(inode, file, &if6_seq_ops,
4094 sizeof(struct if6_iter_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004095}
4096
Arjan van de Ven9a321442007-02-12 00:55:35 -08004097static const struct file_operations if6_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004098 .owner = THIS_MODULE,
4099 .open = if6_seq_open,
4100 .read = seq_read,
4101 .llseek = seq_lseek,
Daniel Lezcano3c400902008-01-10 22:42:49 -08004102 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004103};
4104
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00004105static int __net_init if6_proc_net_init(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004106{
Gao fengd4beaa62013-02-18 01:34:54 +00004107 if (!proc_create("if_inet6", S_IRUGO, net->proc_net, &if6_fops))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004108 return -ENOMEM;
4109 return 0;
4110}
4111
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00004112static void __net_exit if6_proc_net_exit(struct net *net)
Daniel Lezcano3c400902008-01-10 22:42:49 -08004113{
Gao fengece31ff2013-02-18 01:34:56 +00004114 remove_proc_entry("if_inet6", net->proc_net);
Daniel Lezcano3c400902008-01-10 22:42:49 -08004115}
4116
4117static struct pernet_operations if6_proc_net_ops = {
Ian Morris67ba4152014-08-24 21:53:10 +01004118 .init = if6_proc_net_init,
4119 .exit = if6_proc_net_exit,
Daniel Lezcano3c400902008-01-10 22:42:49 -08004120};
4121
4122int __init if6_proc_init(void)
4123{
4124 return register_pernet_subsys(&if6_proc_net_ops);
4125}
4126
Linus Torvalds1da177e2005-04-16 15:20:36 -07004127void if6_proc_exit(void)
4128{
Daniel Lezcano3c400902008-01-10 22:42:49 -08004129 unregister_pernet_subsys(&if6_proc_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004130}
4131#endif /* CONFIG_PROC_FS */
4132
Amerigo Wang07a93622012-10-29 16:23:10 +00004133#if IS_ENABLED(CONFIG_IPV6_MIP6)
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07004134/* Check if address is a home address configured on any interface. */
Eric Dumazetb71d1d42011-04-22 04:53:02 +00004135int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr)
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07004136{
4137 int ret = 0;
stephen hemmingerc2e21292010-03-17 20:31:10 +00004138 struct inet6_ifaddr *ifp = NULL;
Eric Dumazetddbe5032012-07-18 08:11:12 +00004139 unsigned int hash = inet6_addr_hash(addr);
stephen hemmingerc2e21292010-03-17 20:31:10 +00004140
stephen hemminger5c578aed2010-03-17 20:31:11 +00004141 rcu_read_lock_bh();
Sasha Levinb67bfe02013-02-27 17:06:00 -08004142 hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09004143 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcano389f6612008-01-10 22:44:40 -08004144 continue;
YOSHIFUJI Hideakicaad2952008-04-10 15:42:07 +09004145 if (ipv6_addr_equal(&ifp->addr, addr) &&
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07004146 (ifp->flags & IFA_F_HOMEADDRESS)) {
4147 ret = 1;
4148 break;
4149 }
4150 }
stephen hemminger5c578aed2010-03-17 20:31:11 +00004151 rcu_read_unlock_bh();
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07004152 return ret;
4153}
4154#endif
4155
Linus Torvalds1da177e2005-04-16 15:20:36 -07004156/*
4157 * Periodic address status verification
4158 */
4159
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01004160static void addrconf_verify_rtnl(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004161{
YOSHIFUJI Hideakib2db7562010-03-20 16:11:12 -07004162 unsigned long now, next, next_sec, next_sched;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004163 struct inet6_ifaddr *ifp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004164 int i;
4165
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01004166 ASSERT_RTNL();
4167
stephen hemminger5c578aed2010-03-17 20:31:11 +00004168 rcu_read_lock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004169 now = jiffies;
YOSHIFUJI Hideakib2db7562010-03-20 16:11:12 -07004170 next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004171
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01004172 cancel_delayed_work(&addr_chk_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004173
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07004174 for (i = 0; i < IN6_ADDR_HSIZE; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004175restart:
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01004176 hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[i], addr_lst) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004177 unsigned long age;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004178
Yasushi Asanofad8da32013-12-31 12:04:19 +09004179 /* When setting preferred_lft to a value not zero or
4180 * infinity, while valid_lft is infinity
4181 * IFA_F_PERMANENT has a non-infinity life time.
4182 */
4183 if ((ifp->flags & IFA_F_PERMANENT) &&
4184 (ifp->prefered_lft == INFINITY_LIFE_TIME))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004185 continue;
4186
4187 spin_lock(&ifp->lock);
YOSHIFUJI Hideakib2db7562010-03-20 16:11:12 -07004188 /* We try to batch several events at once. */
4189 age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004190
YOSHIFUJI Hideaki8f27ebb2006-07-28 18:12:11 +09004191 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
4192 age >= ifp->valid_lft) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004193 spin_unlock(&ifp->lock);
4194 in6_ifa_hold(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004195 ipv6_del_addr(ifp);
4196 goto restart;
YOSHIFUJI Hideaki8f27ebb2006-07-28 18:12:11 +09004197 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
4198 spin_unlock(&ifp->lock);
4199 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004200 } else if (age >= ifp->prefered_lft) {
Brian Haleya1ed0522009-07-02 07:10:52 +00004201 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004202 int deprecate = 0;
4203
4204 if (!(ifp->flags&IFA_F_DEPRECATED)) {
4205 deprecate = 1;
4206 ifp->flags |= IFA_F_DEPRECATED;
4207 }
4208
Yasushi Asanofad8da32013-12-31 12:04:19 +09004209 if ((ifp->valid_lft != INFINITY_LIFE_TIME) &&
4210 (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004211 next = ifp->tstamp + ifp->valid_lft * HZ;
4212
4213 spin_unlock(&ifp->lock);
4214
4215 if (deprecate) {
4216 in6_ifa_hold(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004217
4218 ipv6_ifa_notify(0, ifp);
4219 in6_ifa_put(ifp);
4220 goto restart;
4221 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004222 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
4223 !(ifp->flags&IFA_F_TENTATIVE)) {
stephen hemminger88949cf2010-03-17 20:31:17 +00004224 unsigned long regen_advance = ifp->idev->cnf.regen_max_retry *
4225 ifp->idev->cnf.dad_transmits *
Jiri Pirko1f9248e2013-12-07 19:26:53 +01004226 NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME) / HZ;
stephen hemminger88949cf2010-03-17 20:31:17 +00004227
Linus Torvalds1da177e2005-04-16 15:20:36 -07004228 if (age >= ifp->prefered_lft - regen_advance) {
4229 struct inet6_ifaddr *ifpub = ifp->ifpub;
4230 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
4231 next = ifp->tstamp + ifp->prefered_lft * HZ;
4232 if (!ifp->regen_count && ifpub) {
4233 ifp->regen_count++;
4234 in6_ifa_hold(ifp);
4235 in6_ifa_hold(ifpub);
4236 spin_unlock(&ifp->lock);
stephen hemminger5c578aed2010-03-17 20:31:11 +00004237
Hiroyuki YAMAMORI291d8092005-12-23 11:24:05 -08004238 spin_lock(&ifpub->lock);
4239 ifpub->regen_count = 0;
4240 spin_unlock(&ifpub->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004241 ipv6_create_tempaddr(ifpub, ifp);
4242 in6_ifa_put(ifpub);
4243 in6_ifa_put(ifp);
4244 goto restart;
4245 }
4246 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
4247 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
4248 spin_unlock(&ifp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004249 } else {
4250 /* ifp->prefered_lft <= ifp->valid_lft */
4251 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
4252 next = ifp->tstamp + ifp->prefered_lft * HZ;
4253 spin_unlock(&ifp->lock);
4254 }
4255 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004256 }
4257
YOSHIFUJI Hideakib2db7562010-03-20 16:11:12 -07004258 next_sec = round_jiffies_up(next);
4259 next_sched = next;
4260
4261 /* If rounded timeout is accurate enough, accept it. */
4262 if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ))
4263 next_sched = next_sec;
4264
4265 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
4266 if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX))
4267 next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX;
4268
dingtianhongba3542e2013-08-17 10:27:04 +08004269 ADBG(KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
4270 now, next, next_sec, next_sched);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01004271 mod_delayed_work(addrconf_wq, &addr_chk_work, next_sched - now);
stephen hemminger5c578aed2010-03-17 20:31:11 +00004272 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004273}
4274
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01004275static void addrconf_verify_work(struct work_struct *w)
4276{
4277 rtnl_lock();
4278 addrconf_verify_rtnl();
4279 rtnl_unlock();
4280}
4281
4282static void addrconf_verify(void)
4283{
4284 mod_delayed_work(addrconf_wq, &addr_chk_work, 0);
4285}
4286
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004287static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local,
4288 struct in6_addr **peer_pfx)
Thomas Graf461d8832006-09-18 00:09:49 -07004289{
4290 struct in6_addr *pfx = NULL;
4291
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004292 *peer_pfx = NULL;
4293
Thomas Graf461d8832006-09-18 00:09:49 -07004294 if (addr)
4295 pfx = nla_data(addr);
4296
4297 if (local) {
4298 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004299 *peer_pfx = pfx;
4300 pfx = nla_data(local);
Thomas Graf461d8832006-09-18 00:09:49 -07004301 }
4302
4303 return pfx;
4304}
4305
Patrick McHardyef7c79e2007-06-05 12:38:30 -07004306static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
Thomas Graf461d8832006-09-18 00:09:49 -07004307 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
4308 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
4309 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
Jiri Pirko479840f2013-12-06 09:45:21 +01004310 [IFA_FLAGS] = { .len = sizeof(u32) },
Thomas Graf461d8832006-09-18 00:09:49 -07004311};
4312
Linus Torvalds1da177e2005-04-16 15:20:36 -07004313static int
Thomas Graf661d2962013-03-21 07:45:29 +00004314inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004315{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09004316 struct net *net = sock_net(skb->sk);
Thomas Grafb933f712006-09-18 00:10:19 -07004317 struct ifaddrmsg *ifm;
4318 struct nlattr *tb[IFA_MAX+1];
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004319 struct in6_addr *pfx, *peer_pfx;
Heiner Kallweit6046d5b2014-04-20 21:29:36 +02004320 u32 ifa_flags;
Thomas Grafb933f712006-09-18 00:10:19 -07004321 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004322
Thomas Grafb933f712006-09-18 00:10:19 -07004323 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
4324 if (err < 0)
4325 return err;
4326
4327 ifm = nlmsg_data(nlh);
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004328 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx);
Ian Morris63159f22015-03-29 14:00:04 +01004329 if (!pfx)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004330 return -EINVAL;
4331
Heiner Kallweit6046d5b2014-04-20 21:29:36 +02004332 ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags;
4333
4334 /* We ignore other flags so far. */
4335 ifa_flags &= IFA_F_MANAGETEMPADDR;
4336
4337 return inet6_addr_del(net, ifm->ifa_index, ifa_flags, pfx,
4338 ifm->ifa_prefixlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004339}
4340
Jiri Pirko479840f2013-12-06 09:45:21 +01004341static int inet6_addr_modify(struct inet6_ifaddr *ifp, u32 ifa_flags,
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07004342 u32 prefered_lft, u32 valid_lft)
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09004343{
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07004344 u32 flags;
4345 clock_t expires;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09004346 unsigned long timeout;
Jiri Pirko53bd6742013-12-06 09:45:22 +01004347 bool was_managetempaddr;
Thomas Haller5b84efe2014-01-15 15:36:59 +01004348 bool had_prefixroute;
YOSHIFUJI Hideaki46d48042007-02-07 20:36:26 +09004349
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01004350 ASSERT_RTNL();
4351
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09004352 if (!valid_lft || (prefered_lft > valid_lft))
4353 return -EINVAL;
4354
Jiri Pirko53bd6742013-12-06 09:45:22 +01004355 if (ifa_flags & IFA_F_MANAGETEMPADDR &&
4356 (ifp->flags & IFA_F_TEMPORARY || ifp->prefix_len != 64))
4357 return -EINVAL;
4358
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09004359 timeout = addrconf_timeout_fixup(valid_lft, HZ);
4360 if (addrconf_finite_timeout(timeout)) {
4361 expires = jiffies_to_clock_t(timeout * HZ);
4362 valid_lft = timeout;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07004363 flags = RTF_EXPIRES;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09004364 } else {
4365 expires = 0;
4366 flags = 0;
4367 ifa_flags |= IFA_F_PERMANENT;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07004368 }
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09004369
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09004370 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
4371 if (addrconf_finite_timeout(timeout)) {
4372 if (timeout == 0)
4373 ifa_flags |= IFA_F_DEPRECATED;
4374 prefered_lft = timeout;
4375 }
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09004376
4377 spin_lock_bh(&ifp->lock);
Jiri Pirko53bd6742013-12-06 09:45:22 +01004378 was_managetempaddr = ifp->flags & IFA_F_MANAGETEMPADDR;
Thomas Haller5b84efe2014-01-15 15:36:59 +01004379 had_prefixroute = ifp->flags & IFA_F_PERMANENT &&
4380 !(ifp->flags & IFA_F_NOPREFIXROUTE);
Jiri Pirko53bd6742013-12-06 09:45:22 +01004381 ifp->flags &= ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD |
Thomas Haller761aac72014-01-15 15:36:58 +01004382 IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR |
4383 IFA_F_NOPREFIXROUTE);
Jiri Pirko53bd6742013-12-06 09:45:22 +01004384 ifp->flags |= ifa_flags;
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09004385 ifp->tstamp = jiffies;
4386 ifp->valid_lft = valid_lft;
4387 ifp->prefered_lft = prefered_lft;
4388
4389 spin_unlock_bh(&ifp->lock);
4390 if (!(ifp->flags&IFA_F_TENTATIVE))
4391 ipv6_ifa_notify(0, ifp);
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09004392
Thomas Haller761aac72014-01-15 15:36:58 +01004393 if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) {
4394 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
4395 expires, flags);
Thomas Haller5b84efe2014-01-15 15:36:59 +01004396 } else if (had_prefixroute) {
4397 enum cleanup_prefix_rt_t action;
4398 unsigned long rt_expires;
4399
4400 write_lock_bh(&ifp->idev->lock);
4401 action = check_cleanup_prefix_route(ifp, &rt_expires);
4402 write_unlock_bh(&ifp->idev->lock);
4403
4404 if (action != CLEANUP_PREFIX_RT_NOP) {
4405 cleanup_prefix_route(ifp, rt_expires,
4406 action == CLEANUP_PREFIX_RT_DEL);
4407 }
Thomas Haller761aac72014-01-15 15:36:58 +01004408 }
Jiri Pirko53bd6742013-12-06 09:45:22 +01004409
4410 if (was_managetempaddr || ifp->flags & IFA_F_MANAGETEMPADDR) {
4411 if (was_managetempaddr && !(ifp->flags & IFA_F_MANAGETEMPADDR))
4412 valid_lft = prefered_lft = 0;
4413 manage_tempaddrs(ifp->idev, ifp, valid_lft, prefered_lft,
4414 !was_managetempaddr, jiffies);
4415 }
4416
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01004417 addrconf_verify_rtnl();
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09004418
4419 return 0;
4420}
4421
4422static int
Thomas Graf661d2962013-03-21 07:45:29 +00004423inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004424{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09004425 struct net *net = sock_net(skb->sk);
Thomas Graf461d8832006-09-18 00:09:49 -07004426 struct ifaddrmsg *ifm;
4427 struct nlattr *tb[IFA_MAX+1];
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004428 struct in6_addr *pfx, *peer_pfx;
Thomas Graf7198f8c2006-09-18 00:13:46 -07004429 struct inet6_ifaddr *ifa;
4430 struct net_device *dev;
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07004431 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
Jiri Pirko479840f2013-12-06 09:45:21 +01004432 u32 ifa_flags;
Thomas Graf461d8832006-09-18 00:09:49 -07004433 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004434
Thomas Graf461d8832006-09-18 00:09:49 -07004435 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
4436 if (err < 0)
4437 return err;
4438
4439 ifm = nlmsg_data(nlh);
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004440 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx);
Ian Morris63159f22015-03-29 14:00:04 +01004441 if (!pfx)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004442 return -EINVAL;
4443
Thomas Graf461d8832006-09-18 00:09:49 -07004444 if (tb[IFA_CACHEINFO]) {
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09004445 struct ifa_cacheinfo *ci;
Thomas Graf461d8832006-09-18 00:09:49 -07004446
4447 ci = nla_data(tb[IFA_CACHEINFO]);
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09004448 valid_lft = ci->ifa_valid;
Thomas Graf461d8832006-09-18 00:09:49 -07004449 preferred_lft = ci->ifa_prefered;
4450 } else {
4451 preferred_lft = INFINITY_LIFE_TIME;
4452 valid_lft = INFINITY_LIFE_TIME;
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09004453 }
4454
Daniel Lezcanoaf284932008-03-05 10:46:57 -08004455 dev = __dev_get_by_index(net, ifm->ifa_index);
Ian Morris63159f22015-03-29 14:00:04 +01004456 if (!dev)
Thomas Graf7198f8c2006-09-18 00:13:46 -07004457 return -ENODEV;
4458
Jiri Pirko479840f2013-12-06 09:45:21 +01004459 ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags;
4460
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07004461 /* We ignore other flags so far. */
Thomas Haller761aac72014-01-15 15:36:58 +01004462 ifa_flags &= IFA_F_NODAD | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR |
Madhu Challa93a714d2015-02-25 09:58:35 -08004463 IFA_F_NOPREFIXROUTE | IFA_F_MCAUTOJOIN;
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07004464
Daniel Lezcano1cab3da2008-01-10 22:44:09 -08004465 ifa = ipv6_get_ifaddr(net, pfx, dev, 1);
Ian Morris63159f22015-03-29 14:00:04 +01004466 if (!ifa) {
Thomas Graf7198f8c2006-09-18 00:13:46 -07004467 /*
4468 * It would be best to check for !NLM_F_CREATE here but
stephen hemmingerdb9c7c32014-01-12 11:26:32 -08004469 * userspace already relies on not having to provide this.
Thomas Graf7198f8c2006-09-18 00:13:46 -07004470 */
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004471 return inet6_addr_add(net, ifm->ifa_index, pfx, peer_pfx,
Daniel Lezcanoaf284932008-03-05 10:46:57 -08004472 ifm->ifa_prefixlen, ifa_flags,
4473 preferred_lft, valid_lft);
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09004474 }
4475
Thomas Graf7198f8c2006-09-18 00:13:46 -07004476 if (nlh->nlmsg_flags & NLM_F_EXCL ||
4477 !(nlh->nlmsg_flags & NLM_F_REPLACE))
4478 err = -EEXIST;
4479 else
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07004480 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
Thomas Graf7198f8c2006-09-18 00:13:46 -07004481
4482 in6_ifa_put(ifa);
4483
4484 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004485}
4486
Jiri Pirko479840f2013-12-06 09:45:21 +01004487static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u32 flags,
Thomas Graf101bb222006-09-18 00:11:52 -07004488 u8 scope, int ifindex)
4489{
4490 struct ifaddrmsg *ifm;
4491
4492 ifm = nlmsg_data(nlh);
4493 ifm->ifa_family = AF_INET6;
4494 ifm->ifa_prefixlen = prefixlen;
4495 ifm->ifa_flags = flags;
4496 ifm->ifa_scope = scope;
4497 ifm->ifa_index = ifindex;
4498}
4499
Thomas Graf85486af2006-09-18 00:11:24 -07004500static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
4501 unsigned long tstamp, u32 preferred, u32 valid)
4502{
4503 struct ifa_cacheinfo ci;
4504
Thomas Graf18a31e12010-11-17 04:12:02 +00004505 ci.cstamp = cstamp_delta(cstamp);
4506 ci.tstamp = cstamp_delta(tstamp);
Thomas Graf85486af2006-09-18 00:11:24 -07004507 ci.ifa_prefered = preferred;
4508 ci.ifa_valid = valid;
4509
4510 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
4511}
4512
Thomas Graf101bb222006-09-18 00:11:52 -07004513static inline int rt_scope(int ifa_scope)
4514{
4515 if (ifa_scope & IFA_HOST)
4516 return RT_SCOPE_HOST;
4517 else if (ifa_scope & IFA_LINK)
4518 return RT_SCOPE_LINK;
4519 else if (ifa_scope & IFA_SITE)
4520 return RT_SCOPE_SITE;
4521 else
4522 return RT_SCOPE_UNIVERSE;
4523}
4524
Thomas Graf0ab68032006-09-18 00:12:35 -07004525static inline int inet6_ifaddr_msgsize(void)
4526{
Thomas Graf339bf982006-11-10 14:10:15 -08004527 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004528 + nla_total_size(16) /* IFA_LOCAL */
Thomas Graf339bf982006-11-10 14:10:15 -08004529 + nla_total_size(16) /* IFA_ADDRESS */
Jiri Pirko479840f2013-12-06 09:45:21 +01004530 + nla_total_size(sizeof(struct ifa_cacheinfo))
4531 + nla_total_size(4) /* IFA_FLAGS */;
Thomas Graf0ab68032006-09-18 00:12:35 -07004532}
YOSHIFUJI Hideakic5396a32006-06-17 22:48:48 -07004533
Linus Torvalds1da177e2005-04-16 15:20:36 -07004534static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004535 u32 portid, u32 seq, int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004536{
Linus Torvalds1da177e2005-04-16 15:20:36 -07004537 struct nlmsghdr *nlh;
Thomas Graf85486af2006-09-18 00:11:24 -07004538 u32 preferred, valid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004539
Eric W. Biederman15e47302012-09-07 20:12:54 +00004540 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags);
Ian Morris63159f22015-03-29 14:00:04 +01004541 if (!nlh)
Patrick McHardy26932562007-01-31 23:16:40 -08004542 return -EMSGSIZE;
Thomas Graf0ab68032006-09-18 00:12:35 -07004543
Thomas Graf101bb222006-09-18 00:11:52 -07004544 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
4545 ifa->idev->dev->ifindex);
4546
Yasushi Asanofad8da32013-12-31 12:04:19 +09004547 if (!((ifa->flags&IFA_F_PERMANENT) &&
4548 (ifa->prefered_lft == INFINITY_LIFE_TIME))) {
Thomas Graf85486af2006-09-18 00:11:24 -07004549 preferred = ifa->prefered_lft;
4550 valid = ifa->valid_lft;
4551 if (preferred != INFINITY_LIFE_TIME) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004552 long tval = (jiffies - ifa->tstamp)/HZ;
Jens Rosenbooma1faa692009-06-25 04:55:50 +00004553 if (preferred > tval)
4554 preferred -= tval;
4555 else
4556 preferred = 0;
Ben Hutchingsf56619f2010-06-26 11:37:47 +00004557 if (valid != INFINITY_LIFE_TIME) {
4558 if (valid > tval)
4559 valid -= tval;
4560 else
4561 valid = 0;
4562 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004563 }
4564 } else {
Thomas Graf85486af2006-09-18 00:11:24 -07004565 preferred = INFINITY_LIFE_TIME;
4566 valid = INFINITY_LIFE_TIME;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004567 }
Thomas Graf85486af2006-09-18 00:11:24 -07004568
Cong Wang7996c792013-05-22 05:41:06 +00004569 if (!ipv6_addr_any(&ifa->peer_addr)) {
Jiri Benc930345e2015-03-29 16:59:25 +02004570 if (nla_put_in6_addr(skb, IFA_LOCAL, &ifa->addr) < 0 ||
4571 nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->peer_addr) < 0)
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004572 goto error;
4573 } else
Jiri Benc930345e2015-03-29 16:59:25 +02004574 if (nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->addr) < 0)
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004575 goto error;
4576
4577 if (put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0)
4578 goto error;
Thomas Graf85486af2006-09-18 00:11:24 -07004579
Jiri Pirko479840f2013-12-06 09:45:21 +01004580 if (nla_put_u32(skb, IFA_FLAGS, ifa->flags) < 0)
4581 goto error;
4582
Johannes Berg053c0952015-01-16 22:09:00 +01004583 nlmsg_end(skb, nlh);
4584 return 0;
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004585
4586error:
4587 nlmsg_cancel(skb, nlh);
4588 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004589}
4590
4591static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004592 u32 portid, u32 seq, int event, u16 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004593{
Linus Torvalds1da177e2005-04-16 15:20:36 -07004594 struct nlmsghdr *nlh;
Thomas Graf101bb222006-09-18 00:11:52 -07004595 u8 scope = RT_SCOPE_UNIVERSE;
4596 int ifindex = ifmca->idev->dev->ifindex;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004597
Thomas Graf101bb222006-09-18 00:11:52 -07004598 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
4599 scope = RT_SCOPE_SITE;
4600
Eric W. Biederman15e47302012-09-07 20:12:54 +00004601 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags);
Ian Morris63159f22015-03-29 14:00:04 +01004602 if (!nlh)
Patrick McHardy26932562007-01-31 23:16:40 -08004603 return -EMSGSIZE;
Thomas Graf0ab68032006-09-18 00:12:35 -07004604
Thomas Graf101bb222006-09-18 00:11:52 -07004605 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
Jiri Benc930345e2015-03-29 16:59:25 +02004606 if (nla_put_in6_addr(skb, IFA_MULTICAST, &ifmca->mca_addr) < 0 ||
Thomas Graf0ab68032006-09-18 00:12:35 -07004607 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
Patrick McHardy26932562007-01-31 23:16:40 -08004608 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
4609 nlmsg_cancel(skb, nlh);
4610 return -EMSGSIZE;
4611 }
Thomas Graf85486af2006-09-18 00:11:24 -07004612
Johannes Berg053c0952015-01-16 22:09:00 +01004613 nlmsg_end(skb, nlh);
4614 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004615}
4616
4617static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004618 u32 portid, u32 seq, int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004619{
Linus Torvalds1da177e2005-04-16 15:20:36 -07004620 struct nlmsghdr *nlh;
Thomas Graf101bb222006-09-18 00:11:52 -07004621 u8 scope = RT_SCOPE_UNIVERSE;
4622 int ifindex = ifaca->aca_idev->dev->ifindex;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004623
Thomas Graf101bb222006-09-18 00:11:52 -07004624 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
4625 scope = RT_SCOPE_SITE;
4626
Eric W. Biederman15e47302012-09-07 20:12:54 +00004627 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags);
Ian Morris63159f22015-03-29 14:00:04 +01004628 if (!nlh)
Patrick McHardy26932562007-01-31 23:16:40 -08004629 return -EMSGSIZE;
Thomas Graf0ab68032006-09-18 00:12:35 -07004630
Thomas Graf101bb222006-09-18 00:11:52 -07004631 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
Jiri Benc930345e2015-03-29 16:59:25 +02004632 if (nla_put_in6_addr(skb, IFA_ANYCAST, &ifaca->aca_addr) < 0 ||
Thomas Graf0ab68032006-09-18 00:12:35 -07004633 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
Patrick McHardy26932562007-01-31 23:16:40 -08004634 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
4635 nlmsg_cancel(skb, nlh);
4636 return -EMSGSIZE;
4637 }
Thomas Graf85486af2006-09-18 00:11:24 -07004638
Johannes Berg053c0952015-01-16 22:09:00 +01004639 nlmsg_end(skb, nlh);
4640 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004641}
4642
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004643enum addr_type_t {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004644 UNICAST_ADDR,
4645 MULTICAST_ADDR,
4646 ANYCAST_ADDR,
4647};
4648
Eric Dumazet234b27c2009-11-12 04:11:50 +00004649/* called with rcu_read_lock() */
4650static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb,
4651 struct netlink_callback *cb, enum addr_type_t type,
4652 int s_ip_idx, int *p_ip_idx)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004653{
Linus Torvalds1da177e2005-04-16 15:20:36 -07004654 struct ifmcaddr6 *ifmca;
4655 struct ifacaddr6 *ifaca;
Eric Dumazet234b27c2009-11-12 04:11:50 +00004656 int err = 1;
4657 int ip_idx = *p_ip_idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004658
Eric Dumazet234b27c2009-11-12 04:11:50 +00004659 read_lock_bh(&idev->lock);
4660 switch (type) {
stephen hemminger502a2ff2010-03-17 20:31:13 +00004661 case UNICAST_ADDR: {
4662 struct inet6_ifaddr *ifa;
4663
Eric Dumazet234b27c2009-11-12 04:11:50 +00004664 /* unicast address incl. temp addr */
stephen hemminger502a2ff2010-03-17 20:31:13 +00004665 list_for_each_entry(ifa, &idev->addr_list, if_list) {
4666 if (++ip_idx < s_ip_idx)
Eric Dumazet234b27c2009-11-12 04:11:50 +00004667 continue;
4668 err = inet6_fill_ifaddr(skb, ifa,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004669 NETLINK_CB(cb->skb).portid,
Eric Dumazet234b27c2009-11-12 04:11:50 +00004670 cb->nlh->nlmsg_seq,
4671 RTM_NEWADDR,
4672 NLM_F_MULTI);
Johannes Berg053c0952015-01-16 22:09:00 +01004673 if (err < 0)
Eric Dumazet234b27c2009-11-12 04:11:50 +00004674 break;
Nicolas Dichtel63998ac2013-03-22 06:28:43 +00004675 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004676 }
Eric Dumazet234b27c2009-11-12 04:11:50 +00004677 break;
stephen hemminger502a2ff2010-03-17 20:31:13 +00004678 }
Eric Dumazet234b27c2009-11-12 04:11:50 +00004679 case MULTICAST_ADDR:
4680 /* multicast address */
4681 for (ifmca = idev->mc_list; ifmca;
4682 ifmca = ifmca->next, ip_idx++) {
4683 if (ip_idx < s_ip_idx)
4684 continue;
4685 err = inet6_fill_ifmcaddr(skb, ifmca,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004686 NETLINK_CB(cb->skb).portid,
Eric Dumazet234b27c2009-11-12 04:11:50 +00004687 cb->nlh->nlmsg_seq,
4688 RTM_GETMULTICAST,
4689 NLM_F_MULTI);
Johannes Berg053c0952015-01-16 22:09:00 +01004690 if (err < 0)
Eric Dumazet234b27c2009-11-12 04:11:50 +00004691 break;
4692 }
4693 break;
4694 case ANYCAST_ADDR:
4695 /* anycast address */
4696 for (ifaca = idev->ac_list; ifaca;
4697 ifaca = ifaca->aca_next, ip_idx++) {
4698 if (ip_idx < s_ip_idx)
4699 continue;
4700 err = inet6_fill_ifacaddr(skb, ifaca,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004701 NETLINK_CB(cb->skb).portid,
Eric Dumazet234b27c2009-11-12 04:11:50 +00004702 cb->nlh->nlmsg_seq,
4703 RTM_GETANYCAST,
4704 NLM_F_MULTI);
Johannes Berg053c0952015-01-16 22:09:00 +01004705 if (err < 0)
Eric Dumazet234b27c2009-11-12 04:11:50 +00004706 break;
4707 }
4708 break;
4709 default:
4710 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004711 }
Eric Dumazet234b27c2009-11-12 04:11:50 +00004712 read_unlock_bh(&idev->lock);
4713 *p_ip_idx = ip_idx;
4714 return err;
4715}
4716
4717static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
4718 enum addr_type_t type)
4719{
4720 struct net *net = sock_net(skb->sk);
4721 int h, s_h;
4722 int idx, ip_idx;
4723 int s_idx, s_ip_idx;
4724 struct net_device *dev;
4725 struct inet6_dev *idev;
4726 struct hlist_head *head;
Eric Dumazet234b27c2009-11-12 04:11:50 +00004727
4728 s_h = cb->args[0];
4729 s_idx = idx = cb->args[1];
4730 s_ip_idx = ip_idx = cb->args[2];
4731
4732 rcu_read_lock();
Nicolas Dichtel63998ac2013-03-22 06:28:43 +00004733 cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ net->dev_base_seq;
Eric Dumazet234b27c2009-11-12 04:11:50 +00004734 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4735 idx = 0;
4736 head = &net->dev_index_head[h];
Sasha Levinb67bfe02013-02-27 17:06:00 -08004737 hlist_for_each_entry_rcu(dev, head, index_hlist) {
Eric Dumazet234b27c2009-11-12 04:11:50 +00004738 if (idx < s_idx)
4739 goto cont;
Patrick McHardy4b97efd2010-03-26 20:27:49 -07004740 if (h > s_h || idx > s_idx)
Eric Dumazet234b27c2009-11-12 04:11:50 +00004741 s_ip_idx = 0;
4742 ip_idx = 0;
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004743 idev = __in6_dev_get(dev);
4744 if (!idev)
Eric Dumazet234b27c2009-11-12 04:11:50 +00004745 goto cont;
4746
4747 if (in6_dump_addrs(idev, skb, cb, type,
David S. Miller7b46a642015-01-18 23:36:08 -05004748 s_ip_idx, &ip_idx) < 0)
Eric Dumazet234b27c2009-11-12 04:11:50 +00004749 goto done;
4750cont:
4751 idx++;
4752 }
4753 }
4754done:
4755 rcu_read_unlock();
4756 cb->args[0] = h;
4757 cb->args[1] = idx;
4758 cb->args[2] = ip_idx;
4759
Linus Torvalds1da177e2005-04-16 15:20:36 -07004760 return skb->len;
4761}
4762
4763static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
4764{
4765 enum addr_type_t type = UNICAST_ADDR;
Denis V. Lunevb8542722007-12-01 00:21:31 +11004766
Linus Torvalds1da177e2005-04-16 15:20:36 -07004767 return inet6_dump_addr(skb, cb, type);
4768}
4769
4770static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
4771{
4772 enum addr_type_t type = MULTICAST_ADDR;
Denis V. Lunevb8542722007-12-01 00:21:31 +11004773
Linus Torvalds1da177e2005-04-16 15:20:36 -07004774 return inet6_dump_addr(skb, cb, type);
4775}
4776
4777
4778static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
4779{
4780 enum addr_type_t type = ANYCAST_ADDR;
Denis V. Lunevb8542722007-12-01 00:21:31 +11004781
Linus Torvalds1da177e2005-04-16 15:20:36 -07004782 return inet6_dump_addr(skb, cb, type);
4783}
4784
Thomas Graf661d2962013-03-21 07:45:29 +00004785static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh)
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004786{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09004787 struct net *net = sock_net(in_skb->sk);
Thomas Graf1b29fc22006-09-18 00:10:50 -07004788 struct ifaddrmsg *ifm;
4789 struct nlattr *tb[IFA_MAX+1];
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004790 struct in6_addr *addr = NULL, *peer;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004791 struct net_device *dev = NULL;
4792 struct inet6_ifaddr *ifa;
4793 struct sk_buff *skb;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004794 int err;
4795
Thomas Graf1b29fc22006-09-18 00:10:50 -07004796 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
4797 if (err < 0)
4798 goto errout;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004799
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004800 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer);
Ian Morris63159f22015-03-29 14:00:04 +01004801 if (!addr) {
Thomas Graf1b29fc22006-09-18 00:10:50 -07004802 err = -EINVAL;
4803 goto errout;
4804 }
4805
4806 ifm = nlmsg_data(nlh);
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004807 if (ifm->ifa_index)
Benjamin Thery6fda7352008-03-05 10:47:47 -08004808 dev = __dev_get_by_index(net, ifm->ifa_index);
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004809
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004810 ifa = ipv6_get_ifaddr(net, addr, dev, 1);
4811 if (!ifa) {
Thomas Graf1b29fc22006-09-18 00:10:50 -07004812 err = -EADDRNOTAVAIL;
4813 goto errout;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004814 }
4815
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004816 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL);
4817 if (!skb) {
Thomas Graf1b29fc22006-09-18 00:10:50 -07004818 err = -ENOBUFS;
4819 goto errout_ifa;
4820 }
4821
Eric W. Biederman15e47302012-09-07 20:12:54 +00004822 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).portid,
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004823 nlh->nlmsg_seq, RTM_NEWADDR, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08004824 if (err < 0) {
4825 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4826 WARN_ON(err == -EMSGSIZE);
4827 kfree_skb(skb);
4828 goto errout_ifa;
4829 }
Eric W. Biederman15e47302012-09-07 20:12:54 +00004830 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
Thomas Graf1b29fc22006-09-18 00:10:50 -07004831errout_ifa:
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004832 in6_ifa_put(ifa);
Thomas Graf1b29fc22006-09-18 00:10:50 -07004833errout:
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004834 return err;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004835}
4836
Linus Torvalds1da177e2005-04-16 15:20:36 -07004837static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
4838{
4839 struct sk_buff *skb;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09004840 struct net *net = dev_net(ifa->idev->dev);
Thomas Graf5d620262006-08-15 00:35:02 -07004841 int err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004842
Thomas Graf0ab68032006-09-18 00:12:35 -07004843 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
Ian Morris63159f22015-03-29 14:00:04 +01004844 if (!skb)
Thomas Graf5d620262006-08-15 00:35:02 -07004845 goto errout;
4846
4847 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08004848 if (err < 0) {
4849 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4850 WARN_ON(err == -EMSGSIZE);
4851 kfree_skb(skb);
4852 goto errout;
4853 }
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -08004854 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
4855 return;
Thomas Graf5d620262006-08-15 00:35:02 -07004856errout:
4857 if (err < 0)
Benjamin Thery6fda7352008-03-05 10:47:47 -08004858 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004859}
4860
Dave Jonesb6f99a22007-03-22 12:27:49 -07004861static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004862 __s32 *array, int bytes)
4863{
Thomas Graf04561c12006-11-14 19:53:58 -08004864 BUG_ON(bytes < (DEVCONF_MAX * 4));
4865
Linus Torvalds1da177e2005-04-16 15:20:36 -07004866 memset(array, 0, bytes);
4867 array[DEVCONF_FORWARDING] = cnf->forwarding;
4868 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
4869 array[DEVCONF_MTU6] = cnf->mtu6;
4870 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
4871 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
4872 array[DEVCONF_AUTOCONF] = cnf->autoconf;
4873 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
4874 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
Thomas Graf93908d12010-11-17 01:44:24 +00004875 array[DEVCONF_RTR_SOLICIT_INTERVAL] =
4876 jiffies_to_msecs(cnf->rtr_solicit_interval);
4877 array[DEVCONF_RTR_SOLICIT_DELAY] =
4878 jiffies_to_msecs(cnf->rtr_solicit_delay);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004879 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
Hannes Frederic Sowafc4eba52013-08-14 01:03:46 +02004880 array[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL] =
4881 jiffies_to_msecs(cnf->mldv1_unsolicited_report_interval);
4882 array[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL] =
4883 jiffies_to_msecs(cnf->mldv2_unsolicited_report_interval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004884 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
4885 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
4886 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
4887 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
4888 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004889 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -08004890 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
Hangbin Liu8013d1d2015-07-30 14:28:42 +08004891 array[DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT] = cnf->accept_ra_min_hop_limit;
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -08004892 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08004893#ifdef CONFIG_IPV6_ROUTER_PREF
4894 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
Thomas Graf93908d12010-11-17 01:44:24 +00004895 array[DEVCONF_RTR_PROBE_INTERVAL] =
4896 jiffies_to_msecs(cnf->rtr_probe_interval);
Neil Hormanfa03ef32007-01-30 14:30:10 -08004897#ifdef CONFIG_IPV6_ROUTE_INFO
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -08004898 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
4899#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08004900#endif
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -07004901 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -07004902 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
Neil Horman95c385b2007-04-25 17:08:10 -07004903#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4904 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
Erik Kline7fd25612014-10-28 18:11:14 +09004905 array[DEVCONF_USE_OPTIMISTIC] = cnf->use_optimistic;
Neil Horman95c385b2007-04-25 17:08:10 -07004906#endif
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09004907#ifdef CONFIG_IPV6_MROUTE
4908 array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding;
4909#endif
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +09004910 array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6;
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09004911 array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad;
Cosmin Ratiuc3faca02009-10-09 03:11:14 +00004912 array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao;
Hannes Frederic Sowa5cb04432012-11-06 16:46:20 +00004913 array[DEVCONF_NDISC_NOTIFY] = cnf->ndisc_notify;
Hannes Frederic Sowab800c3b2013-08-27 01:36:51 +02004914 array[DEVCONF_SUPPRESS_FRAG_NDISC] = cnf->suppress_frag_ndisc;
Ben Greeard9333192014-06-25 14:44:53 -07004915 array[DEVCONF_ACCEPT_RA_FROM_LOCAL] = cnf->accept_ra_from_local;
Harout Hedeshianc2943f12015-01-20 10:06:05 -07004916 array[DEVCONF_ACCEPT_RA_MTU] = cnf->accept_ra_mtu;
Andy Gospodarek35103d12015-08-13 10:39:01 -04004917 array[DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN] = cnf->ignore_routes_with_linkdown;
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +01004918 /* we omit DEVCONF_STABLE_SECRET for now */
Erik Kline3985e8a2015-07-22 16:38:25 +09004919 array[DEVCONF_USE_OIF_ADDRS_ONLY] = cnf->use_oif_addrs_only;
Johannes Bergabbc3042016-02-04 13:31:19 +01004920 array[DEVCONF_DROP_UNICAST_IN_L2_MULTICAST] = cnf->drop_unicast_in_l2_multicast;
Johannes Berg7a02bf82016-02-04 13:31:20 +01004921 array[DEVCONF_DROP_UNSOLICITED_NA] = cnf->drop_unsolicited_na;
David Ahernf1705ec2016-02-24 09:25:37 -08004922 array[DEVCONF_KEEP_ADDR_ON_DOWN] = cnf->keep_addr_on_down;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004923}
4924
Thomas Grafb382b192010-11-16 04:33:57 +00004925static inline size_t inet6_ifla6_size(void)
4926{
4927 return nla_total_size(4) /* IFLA_INET6_FLAGS */
4928 + nla_total_size(sizeof(struct ifla_cacheinfo))
4929 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
4930 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004931 + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
4932 + nla_total_size(sizeof(struct in6_addr)); /* IFLA_INET6_TOKEN */
Thomas Grafb382b192010-11-16 04:33:57 +00004933}
4934
Thomas Graf339bf982006-11-10 14:10:15 -08004935static inline size_t inet6_if_nlmsg_size(void)
4936{
4937 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
4938 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
4939 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
4940 + nla_total_size(4) /* IFLA_MTU */
4941 + nla_total_size(4) /* IFLA_LINK */
Andy Gospodarek03443382015-08-13 15:26:35 -04004942 + nla_total_size(1) /* IFLA_OPERSTATE */
Thomas Grafb382b192010-11-16 04:33:57 +00004943 + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
Thomas Graf339bf982006-11-10 14:10:15 -08004944}
YOSHIFUJI Hideakic5396a32006-06-17 22:48:48 -07004945
Eric Dumazetbe281e52011-05-19 01:14:23 +00004946static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib,
Tejun Heo7d720c32010-02-16 15:20:26 +00004947 int items, int bytes)
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004948{
4949 int i;
4950 int pad = bytes - sizeof(u64) * items;
4951 BUG_ON(pad < 0);
4952
4953 /* Use put_unaligned() because stats may not be aligned for u64. */
4954 put_unaligned(items, &stats[0]);
4955 for (i = 1; i < items; i++)
Eric Dumazetbe281e52011-05-19 01:14:23 +00004956 put_unaligned(atomic_long_read(&mib[i]), &stats[i]);
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004957
4958 memset(&stats[items], 0, pad);
4959}
4960
WANG Cong698365f2014-05-05 15:55:55 -07004961static inline void __snmp6_fill_stats64(u64 *stats, void __percpu *mib,
Raghavendra K Ta3a77372015-08-30 11:29:42 +05304962 int bytes, size_t syncpoff)
Eric Dumazet4ce3c182010-06-30 13:31:19 -07004963{
Raghavendra K Ta3a77372015-08-30 11:29:42 +05304964 int i, c;
4965 u64 buff[IPSTATS_MIB_MAX];
4966 int pad = bytes - sizeof(u64) * IPSTATS_MIB_MAX;
4967
Eric Dumazet4ce3c182010-06-30 13:31:19 -07004968 BUG_ON(pad < 0);
4969
Raghavendra K Ta3a77372015-08-30 11:29:42 +05304970 memset(buff, 0, sizeof(buff));
4971 buff[0] = IPSTATS_MIB_MAX;
Eric Dumazet4ce3c182010-06-30 13:31:19 -07004972
Raghavendra K Ta3a77372015-08-30 11:29:42 +05304973 for_each_possible_cpu(c) {
4974 for (i = 1; i < IPSTATS_MIB_MAX; i++)
4975 buff[i] += snmp_get_cpu_field64(mib, c, i, syncpoff);
4976 }
4977
4978 memcpy(stats, buff, IPSTATS_MIB_MAX * sizeof(u64));
4979 memset(&stats[IPSTATS_MIB_MAX], 0, pad);
Eric Dumazet4ce3c182010-06-30 13:31:19 -07004980}
4981
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004982static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
4983 int bytes)
4984{
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004985 switch (attrtype) {
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004986 case IFLA_INET6_STATS:
Raghavendra K Ta3a77372015-08-30 11:29:42 +05304987 __snmp6_fill_stats64(stats, idev->stats.ipv6, bytes,
4988 offsetof(struct ipstats_mib, syncp));
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004989 break;
4990 case IFLA_INET6_ICMP6STATS:
Eric Dumazetbe281e52011-05-19 01:14:23 +00004991 __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, ICMP6_MIB_MAX, bytes);
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004992 break;
4993 }
4994}
4995
Sowmini Varadhand5566fd2015-09-11 16:48:48 -04004996static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev,
4997 u32 ext_filter_mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004998{
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07004999 struct nlattr *nla;
Thomas Graf04561c12006-11-14 19:53:58 -08005000 struct ifla_cacheinfo ci;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005001
David S. Millerc78679e2012-04-01 20:27:33 -04005002 if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags))
5003 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005004 ci.max_reasm_len = IPV6_MAXPLEN;
David S. Miller24912422010-11-19 13:13:47 -08005005 ci.tstamp = cstamp_delta(idev->tstamp);
5006 ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time);
Jiri Pirko1f9248e2013-12-07 19:26:53 +01005007 ci.retrans_time = jiffies_to_msecs(NEIGH_VAR(idev->nd_parms, RETRANS_TIME));
David S. Millerc78679e2012-04-01 20:27:33 -04005008 if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci))
5009 goto nla_put_failure;
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07005010 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
Ian Morris63159f22015-03-29 14:00:04 +01005011 if (!nla)
Thomas Graf04561c12006-11-14 19:53:58 -08005012 goto nla_put_failure;
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07005013 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
Linus Torvalds1da177e2005-04-16 15:20:36 -07005014
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07005015 /* XXX - MC not implemented */
5016
Sowmini Varadhand5566fd2015-09-11 16:48:48 -04005017 if (ext_filter_mask & RTEXT_FILTER_SKIP_STATS)
5018 return 0;
5019
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07005020 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
Ian Morris63159f22015-03-29 14:00:04 +01005021 if (!nla)
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07005022 goto nla_put_failure;
5023 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
5024
5025 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
Ian Morris63159f22015-03-29 14:00:04 +01005026 if (!nla)
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07005027 goto nla_put_failure;
5028 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
Linus Torvalds1da177e2005-04-16 15:20:36 -07005029
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005030 nla = nla_reserve(skb, IFLA_INET6_TOKEN, sizeof(struct in6_addr));
Ian Morris63159f22015-03-29 14:00:04 +01005031 if (!nla)
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005032 goto nla_put_failure;
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02005033
5034 if (nla_put_u8(skb, IFLA_INET6_ADDR_GEN_MODE, idev->addr_gen_mode))
5035 goto nla_put_failure;
5036
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005037 read_lock_bh(&idev->lock);
5038 memcpy(nla_data(nla), idev->token.s6_addr, nla_len(nla));
5039 read_unlock_bh(&idev->lock);
5040
Thomas Grafb382b192010-11-16 04:33:57 +00005041 return 0;
5042
5043nla_put_failure:
5044 return -EMSGSIZE;
5045}
5046
Arad, Ronenb1974ed2015-10-19 09:23:28 -07005047static size_t inet6_get_link_af_size(const struct net_device *dev,
5048 u32 ext_filter_mask)
Thomas Grafb382b192010-11-16 04:33:57 +00005049{
5050 if (!__in6_dev_get(dev))
5051 return 0;
5052
5053 return inet6_ifla6_size();
5054}
5055
Sowmini Varadhand5566fd2015-09-11 16:48:48 -04005056static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev,
5057 u32 ext_filter_mask)
Thomas Grafb382b192010-11-16 04:33:57 +00005058{
5059 struct inet6_dev *idev = __in6_dev_get(dev);
5060
5061 if (!idev)
5062 return -ENODATA;
5063
Sowmini Varadhand5566fd2015-09-11 16:48:48 -04005064 if (inet6_fill_ifla6_attrs(skb, idev, ext_filter_mask) < 0)
Thomas Grafb382b192010-11-16 04:33:57 +00005065 return -EMSGSIZE;
5066
5067 return 0;
5068}
5069
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005070static int inet6_set_iftoken(struct inet6_dev *idev, struct in6_addr *token)
5071{
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005072 struct inet6_ifaddr *ifp;
5073 struct net_device *dev = idev->dev;
Daniel Borkmann47e27d52016-04-08 15:55:00 +02005074 bool clear_token, update_rs = false;
Hannes Frederic Sowadc848292013-06-24 21:42:40 +02005075 struct in6_addr ll_addr;
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005076
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01005077 ASSERT_RTNL();
5078
Ian Morris63159f22015-03-29 14:00:04 +01005079 if (!token)
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005080 return -EINVAL;
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005081 if (dev->flags & (IFF_LOOPBACK | IFF_NOARP))
5082 return -EINVAL;
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005083 if (!ipv6_accept_ra(idev))
5084 return -EINVAL;
5085 if (idev->cnf.rtr_solicits <= 0)
5086 return -EINVAL;
5087
5088 write_lock_bh(&idev->lock);
5089
5090 BUILD_BUG_ON(sizeof(token->s6_addr) != 16);
5091 memcpy(idev->token.s6_addr + 8, token->s6_addr + 8, 8);
5092
5093 write_unlock_bh(&idev->lock);
5094
Daniel Borkmann47e27d52016-04-08 15:55:00 +02005095 clear_token = ipv6_addr_any(token);
5096 if (clear_token)
5097 goto update_lft;
5098
Hannes Frederic Sowadc848292013-06-24 21:42:40 +02005099 if (!idev->dead && (idev->if_flags & IF_READY) &&
5100 !ipv6_get_lladdr(dev, &ll_addr, IFA_F_TENTATIVE |
5101 IFA_F_OPTIMISTIC)) {
Daniel Borkmannfc403832013-04-09 03:47:15 +00005102 /* If we're not ready, then normal ifup will take care
5103 * of this. Otherwise, we need to request our rs here.
5104 */
5105 ndisc_send_rs(dev, &ll_addr, &in6addr_linklocal_allrouters);
5106 update_rs = true;
5107 }
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005108
Daniel Borkmann47e27d52016-04-08 15:55:00 +02005109update_lft:
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005110 write_lock_bh(&idev->lock);
Daniel Borkmannfc403832013-04-09 03:47:15 +00005111
Hannes Frederic Sowa77ecaac2013-06-26 03:41:49 +02005112 if (update_rs) {
Daniel Borkmannfc403832013-04-09 03:47:15 +00005113 idev->if_flags |= IF_RS_SENT;
Hannes Frederic Sowa77ecaac2013-06-26 03:41:49 +02005114 idev->rs_probes = 1;
5115 addrconf_mod_rs_timer(idev, idev->cnf.rtr_solicit_interval);
5116 }
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005117
5118 /* Well, that's kinda nasty ... */
5119 list_for_each_entry(ifp, &idev->addr_list, if_list) {
5120 spin_lock(&ifp->lock);
Daniel Borkmann617fe292013-04-09 03:47:16 +00005121 if (ifp->tokenized) {
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005122 ifp->valid_lft = 0;
5123 ifp->prefered_lft = 0;
5124 }
5125 spin_unlock(&ifp->lock);
5126 }
5127
5128 write_unlock_bh(&idev->lock);
Lubomir Rintelb2ed64a2014-10-27 17:39:16 +01005129 inet6_ifinfo_notify(RTM_NEWLINK, idev);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01005130 addrconf_verify_rtnl();
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005131 return 0;
5132}
5133
Daniel Borkmann11b1f822015-02-05 14:39:11 +01005134static const struct nla_policy inet6_af_policy[IFLA_INET6_MAX + 1] = {
5135 [IFLA_INET6_ADDR_GEN_MODE] = { .type = NLA_U8 },
5136 [IFLA_INET6_TOKEN] = { .len = sizeof(struct in6_addr) },
5137};
5138
5139static int inet6_validate_link_af(const struct net_device *dev,
5140 const struct nlattr *nla)
5141{
5142 struct nlattr *tb[IFLA_INET6_MAX + 1];
5143
5144 if (dev && !__in6_dev_get(dev))
5145 return -EAFNOSUPPORT;
5146
5147 return nla_parse_nested(tb, IFLA_INET6_MAX, nla, inet6_af_policy);
5148}
5149
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005150static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla)
5151{
5152 int err = -EINVAL;
5153 struct inet6_dev *idev = __in6_dev_get(dev);
5154 struct nlattr *tb[IFLA_INET6_MAX + 1];
5155
5156 if (!idev)
5157 return -EAFNOSUPPORT;
5158
5159 if (nla_parse_nested(tb, IFLA_INET6_MAX, nla, NULL) < 0)
5160 BUG();
5161
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02005162 if (tb[IFLA_INET6_TOKEN]) {
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005163 err = inet6_set_iftoken(idev, nla_data(tb[IFLA_INET6_TOKEN]));
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02005164 if (err)
5165 return err;
5166 }
5167
5168 if (tb[IFLA_INET6_ADDR_GEN_MODE]) {
5169 u8 mode = nla_get_u8(tb[IFLA_INET6_ADDR_GEN_MODE]);
5170
5171 if (mode != IN6_ADDR_GEN_MODE_EUI64 &&
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01005172 mode != IN6_ADDR_GEN_MODE_NONE &&
Bjørn Morkcc9da6c2015-12-16 16:44:38 +01005173 mode != IN6_ADDR_GEN_MODE_STABLE_PRIVACY &&
5174 mode != IN6_ADDR_GEN_MODE_RANDOM)
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02005175 return -EINVAL;
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01005176
5177 if (mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY &&
5178 !idev->cnf.stable_secret.initialized &&
5179 !dev_net(dev)->ipv6.devconf_dflt->stable_secret.initialized)
5180 return -EINVAL;
5181
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02005182 idev->addr_gen_mode = mode;
5183 err = 0;
5184 }
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005185
5186 return err;
5187}
5188
Thomas Grafb382b192010-11-16 04:33:57 +00005189static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
Eric W. Biederman15e47302012-09-07 20:12:54 +00005190 u32 portid, u32 seq, int event, unsigned int flags)
Thomas Grafb382b192010-11-16 04:33:57 +00005191{
5192 struct net_device *dev = idev->dev;
5193 struct ifinfomsg *hdr;
5194 struct nlmsghdr *nlh;
5195 void *protoinfo;
5196
Eric W. Biederman15e47302012-09-07 20:12:54 +00005197 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*hdr), flags);
Ian Morris63159f22015-03-29 14:00:04 +01005198 if (!nlh)
Thomas Grafb382b192010-11-16 04:33:57 +00005199 return -EMSGSIZE;
5200
5201 hdr = nlmsg_data(nlh);
5202 hdr->ifi_family = AF_INET6;
5203 hdr->__ifi_pad = 0;
5204 hdr->ifi_type = dev->type;
5205 hdr->ifi_index = dev->ifindex;
5206 hdr->ifi_flags = dev_get_flags(dev);
5207 hdr->ifi_change = 0;
5208
David S. Millerc78679e2012-04-01 20:27:33 -04005209 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
5210 (dev->addr_len &&
5211 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
5212 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
Nicolas Dichtela54acb32015-04-02 17:07:00 +02005213 (dev->ifindex != dev_get_iflink(dev) &&
Andy Gospodarek03443382015-08-13 15:26:35 -04005214 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
5215 nla_put_u8(skb, IFLA_OPERSTATE,
5216 netif_running(dev) ? dev->operstate : IF_OPER_DOWN))
David S. Millerc78679e2012-04-01 20:27:33 -04005217 goto nla_put_failure;
Thomas Grafb382b192010-11-16 04:33:57 +00005218 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
Ian Morris63159f22015-03-29 14:00:04 +01005219 if (!protoinfo)
Thomas Grafb382b192010-11-16 04:33:57 +00005220 goto nla_put_failure;
5221
Sowmini Varadhand5566fd2015-09-11 16:48:48 -04005222 if (inet6_fill_ifla6_attrs(skb, idev, 0) < 0)
Thomas Grafb382b192010-11-16 04:33:57 +00005223 goto nla_put_failure;
5224
Thomas Graf04561c12006-11-14 19:53:58 -08005225 nla_nest_end(skb, protoinfo);
Johannes Berg053c0952015-01-16 22:09:00 +01005226 nlmsg_end(skb, nlh);
5227 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005228
Thomas Graf04561c12006-11-14 19:53:58 -08005229nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -08005230 nlmsg_cancel(skb, nlh);
5231 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005232}
5233
5234static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
5235{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09005236 struct net *net = sock_net(skb->sk);
Eric Dumazet84d26972009-11-09 12:11:28 +00005237 int h, s_h;
David S. Miller434a8a52009-11-11 18:53:00 -08005238 int idx = 0, s_idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005239 struct net_device *dev;
5240 struct inet6_dev *idev;
Eric Dumazet84d26972009-11-09 12:11:28 +00005241 struct hlist_head *head;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005242
Eric Dumazet84d26972009-11-09 12:11:28 +00005243 s_h = cb->args[0];
5244 s_idx = cb->args[1];
5245
5246 rcu_read_lock();
5247 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
5248 idx = 0;
5249 head = &net->dev_index_head[h];
Sasha Levinb67bfe02013-02-27 17:06:00 -08005250 hlist_for_each_entry_rcu(dev, head, index_hlist) {
Eric Dumazet84d26972009-11-09 12:11:28 +00005251 if (idx < s_idx)
5252 goto cont;
5253 idev = __in6_dev_get(dev);
5254 if (!idev)
5255 goto cont;
5256 if (inet6_fill_ifinfo(skb, idev,
Eric W. Biederman15e47302012-09-07 20:12:54 +00005257 NETLINK_CB(cb->skb).portid,
Eric Dumazet84d26972009-11-09 12:11:28 +00005258 cb->nlh->nlmsg_seq,
Johannes Berg053c0952015-01-16 22:09:00 +01005259 RTM_NEWLINK, NLM_F_MULTI) < 0)
Eric Dumazet84d26972009-11-09 12:11:28 +00005260 goto out;
Pavel Emelianov7562f872007-05-03 15:13:45 -07005261cont:
Eric Dumazet84d26972009-11-09 12:11:28 +00005262 idx++;
5263 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005264 }
Eric Dumazet84d26972009-11-09 12:11:28 +00005265out:
5266 rcu_read_unlock();
5267 cb->args[1] = idx;
5268 cb->args[0] = h;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005269
5270 return skb->len;
5271}
5272
5273void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
5274{
5275 struct sk_buff *skb;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09005276 struct net *net = dev_net(idev->dev);
Thomas Graf8d7a76c2006-08-15 00:35:47 -07005277 int err = -ENOBUFS;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09005278
Thomas Graf339bf982006-11-10 14:10:15 -08005279 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
Ian Morris63159f22015-03-29 14:00:04 +01005280 if (!skb)
Thomas Graf8d7a76c2006-08-15 00:35:47 -07005281 goto errout;
5282
5283 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08005284 if (err < 0) {
5285 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
5286 WARN_ON(err == -EMSGSIZE);
5287 kfree_skb(skb);
5288 goto errout;
5289 }
Nicolas Dichtel5f75a102010-12-07 23:38:31 +00005290 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC);
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -08005291 return;
Thomas Graf8d7a76c2006-08-15 00:35:47 -07005292errout:
5293 if (err < 0)
Nicolas Dichtel5f75a102010-12-07 23:38:31 +00005294 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005295}
5296
Thomas Graf339bf982006-11-10 14:10:15 -08005297static inline size_t inet6_prefix_nlmsg_size(void)
5298{
5299 return NLMSG_ALIGN(sizeof(struct prefixmsg))
5300 + nla_total_size(sizeof(struct in6_addr))
5301 + nla_total_size(sizeof(struct prefix_cacheinfo));
5302}
YOSHIFUJI Hideakic5396a32006-06-17 22:48:48 -07005303
Linus Torvalds1da177e2005-04-16 15:20:36 -07005304static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
Eric W. Biederman15e47302012-09-07 20:12:54 +00005305 struct prefix_info *pinfo, u32 portid, u32 seq,
Thomas Graf6051e2f2006-11-14 19:54:19 -08005306 int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005307{
Thomas Graf6051e2f2006-11-14 19:54:19 -08005308 struct prefixmsg *pmsg;
5309 struct nlmsghdr *nlh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005310 struct prefix_cacheinfo ci;
5311
Eric W. Biederman15e47302012-09-07 20:12:54 +00005312 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*pmsg), flags);
Ian Morris63159f22015-03-29 14:00:04 +01005313 if (!nlh)
Patrick McHardy26932562007-01-31 23:16:40 -08005314 return -EMSGSIZE;
Thomas Graf6051e2f2006-11-14 19:54:19 -08005315
5316 pmsg = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005317 pmsg->prefix_family = AF_INET6;
Patrick McHardy8a470772005-06-28 12:56:45 -07005318 pmsg->prefix_pad1 = 0;
5319 pmsg->prefix_pad2 = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005320 pmsg->prefix_ifindex = idev->dev->ifindex;
5321 pmsg->prefix_len = pinfo->prefix_len;
5322 pmsg->prefix_type = pinfo->type;
Patrick McHardy8a470772005-06-28 12:56:45 -07005323 pmsg->prefix_pad3 = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005324 pmsg->prefix_flags = 0;
5325 if (pinfo->onlink)
5326 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
5327 if (pinfo->autoconf)
5328 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
5329
David S. Millerc78679e2012-04-01 20:27:33 -04005330 if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix))
5331 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005332 ci.preferred_time = ntohl(pinfo->prefered);
5333 ci.valid_time = ntohl(pinfo->valid);
David S. Millerc78679e2012-04-01 20:27:33 -04005334 if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci))
5335 goto nla_put_failure;
Johannes Berg053c0952015-01-16 22:09:00 +01005336 nlmsg_end(skb, nlh);
5337 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005338
Thomas Graf6051e2f2006-11-14 19:54:19 -08005339nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -08005340 nlmsg_cancel(skb, nlh);
5341 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005342}
5343
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09005344static void inet6_prefix_notify(int event, struct inet6_dev *idev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005345 struct prefix_info *pinfo)
5346{
5347 struct sk_buff *skb;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09005348 struct net *net = dev_net(idev->dev);
Thomas Graf8c384bfa2006-08-15 00:36:07 -07005349 int err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005350
Thomas Graf339bf982006-11-10 14:10:15 -08005351 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
Ian Morris63159f22015-03-29 14:00:04 +01005352 if (!skb)
Thomas Graf8c384bfa2006-08-15 00:36:07 -07005353 goto errout;
5354
5355 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08005356 if (err < 0) {
5357 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
5358 WARN_ON(err == -EMSGSIZE);
5359 kfree_skb(skb);
5360 goto errout;
5361 }
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -08005362 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
5363 return;
Thomas Graf8c384bfa2006-08-15 00:36:07 -07005364errout:
5365 if (err < 0)
Benjamin Thery6fda7352008-03-05 10:47:47 -08005366 rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005367}
5368
Linus Torvalds1da177e2005-04-16 15:20:36 -07005369static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
5370{
Nicolas Dichtel63998ac2013-03-22 06:28:43 +00005371 struct net *net = dev_net(ifp->idev->dev);
5372
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01005373 if (event)
5374 ASSERT_RTNL();
5375
Linus Torvalds1da177e2005-04-16 15:20:36 -07005376 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
5377
5378 switch (event) {
5379 case RTM_NEWADDR:
Neil Horman95c385b2007-04-25 17:08:10 -07005380 /*
5381 * If the address was optimistic
5382 * we inserted the route at the start of
5383 * our DAD process, so we don't need
5384 * to do it again
5385 */
5386 if (!(ifp->rt->rt6i_node))
5387 ip6_ins_rt(ifp->rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005388 if (ifp->idev->cnf.forwarding)
5389 addrconf_join_anycast(ifp);
Cong Wang7996c792013-05-22 05:41:06 +00005390 if (!ipv6_addr_any(&ifp->peer_addr))
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00005391 addrconf_prefix_route(&ifp->peer_addr, 128,
5392 ifp->idev->dev, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005393 break;
5394 case RTM_DELADDR:
5395 if (ifp->idev->cnf.forwarding)
5396 addrconf_leave_anycast(ifp);
5397 addrconf_leave_solict(ifp->idev, &ifp->addr);
Cong Wang7996c792013-05-22 05:41:06 +00005398 if (!ipv6_addr_any(&ifp->peer_addr)) {
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00005399 struct rt6_info *rt;
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00005400
Nicolas Dichtele7478df2014-09-03 23:59:22 +02005401 rt = addrconf_get_prefix_route(&ifp->peer_addr, 128,
5402 ifp->idev->dev, 0, 0);
Martin KaFai Lau8e3d5be2015-09-15 14:30:08 -07005403 if (rt)
5404 ip6_del_rt(rt);
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00005405 }
David Ahern38bd10c2016-04-21 20:56:12 -07005406 if (ifp->rt) {
5407 dst_hold(&ifp->rt->dst);
5408 ip6_del_rt(ifp->rt);
5409 }
Hannes Frederic Sowa705f1c82014-09-28 00:46:06 +02005410 rt_genid_bump_ipv6(net);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005411 break;
5412 }
Nicolas Dichtel63998ac2013-03-22 06:28:43 +00005413 atomic_inc(&net->ipv6.dev_addr_genid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005414}
5415
5416static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
5417{
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07005418 rcu_read_lock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07005419 if (likely(ifp->idev->dead == 0))
5420 __ipv6_ifa_notify(event, ifp);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07005421 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07005422}
5423
5424#ifdef CONFIG_SYSCTL
5425
5426static
Joe Perchesfe2c6332013-06-11 23:04:25 -07005427int addrconf_sysctl_forward(struct ctl_table *ctl, int write,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005428 void __user *buffer, size_t *lenp, loff_t *ppos)
5429{
5430 int *valp = ctl->data;
5431 int val = *valp;
Eric W. Biederman88af1822010-02-19 13:22:59 +00005432 loff_t pos = *ppos;
Joe Perchesfe2c6332013-06-11 23:04:25 -07005433 struct ctl_table lctl;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005434 int ret;
5435
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00005436 /*
5437 * ctl->data points to idev->cnf.forwarding, we should
5438 * not modify it until we get the rtnl lock.
5439 */
5440 lctl = *ctl;
5441 lctl.data = &val;
5442
5443 ret = proc_dointvec(&lctl, write, buffer, lenp, ppos);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005444
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -08005445 if (write)
Stephen Hemmingerb325fdd2009-02-26 06:55:31 +00005446 ret = addrconf_fixup_forwarding(ctl, valp, val);
Eric W. Biederman88af1822010-02-19 13:22:59 +00005447 if (ret)
5448 *ppos = pos;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09005449 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005450}
5451
Marcelo Leitner77751422015-02-23 11:17:13 -03005452static
Phil Sutterd6df1982015-12-01 22:45:15 +01005453int addrconf_sysctl_hop_limit(struct ctl_table *ctl, int write,
5454 void __user *buffer, size_t *lenp, loff_t *ppos)
5455{
5456 struct ctl_table lctl;
5457 int min_hl = 1, max_hl = 255;
5458
5459 lctl = *ctl;
5460 lctl.extra1 = &min_hl;
5461 lctl.extra2 = &max_hl;
5462
5463 return proc_dointvec_minmax(&lctl, write, buffer, lenp, ppos);
5464}
5465
5466static
Marcelo Leitner77751422015-02-23 11:17:13 -03005467int addrconf_sysctl_mtu(struct ctl_table *ctl, int write,
5468 void __user *buffer, size_t *lenp, loff_t *ppos)
5469{
5470 struct inet6_dev *idev = ctl->extra1;
5471 int min_mtu = IPV6_MIN_MTU;
5472 struct ctl_table lctl;
5473
5474 lctl = *ctl;
5475 lctl.extra1 = &min_mtu;
5476 lctl.extra2 = idev ? &idev->dev->mtu : NULL;
5477
5478 return proc_dointvec_minmax(&lctl, write, buffer, lenp, ppos);
5479}
5480
Brian Haley56d417b2009-06-01 03:07:33 -07005481static void dev_disable_change(struct inet6_dev *idev)
5482{
Cong Wang75538c22013-05-29 11:30:50 +08005483 struct netdev_notifier_info info;
5484
Brian Haley56d417b2009-06-01 03:07:33 -07005485 if (!idev || !idev->dev)
5486 return;
5487
Cong Wang75538c22013-05-29 11:30:50 +08005488 netdev_notifier_info_init(&info, idev->dev);
Brian Haley56d417b2009-06-01 03:07:33 -07005489 if (idev->cnf.disable_ipv6)
Cong Wang75538c22013-05-29 11:30:50 +08005490 addrconf_notify(NULL, NETDEV_DOWN, &info);
Brian Haley56d417b2009-06-01 03:07:33 -07005491 else
Cong Wang75538c22013-05-29 11:30:50 +08005492 addrconf_notify(NULL, NETDEV_UP, &info);
Brian Haley56d417b2009-06-01 03:07:33 -07005493}
5494
5495static void addrconf_disable_change(struct net *net, __s32 newf)
5496{
5497 struct net_device *dev;
5498 struct inet6_dev *idev;
5499
Eric Dumazetc6d14c82009-11-04 05:43:23 -08005500 rcu_read_lock();
5501 for_each_netdev_rcu(net, dev) {
Brian Haley56d417b2009-06-01 03:07:33 -07005502 idev = __in6_dev_get(dev);
5503 if (idev) {
5504 int changed = (!idev->cnf.disable_ipv6) ^ (!newf);
5505 idev->cnf.disable_ipv6 = newf;
5506 if (changed)
5507 dev_disable_change(idev);
5508 }
Brian Haley56d417b2009-06-01 03:07:33 -07005509 }
Eric Dumazetc6d14c82009-11-04 05:43:23 -08005510 rcu_read_unlock();
Brian Haley56d417b2009-06-01 03:07:33 -07005511}
5512
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00005513static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf)
Brian Haley56d417b2009-06-01 03:07:33 -07005514{
5515 struct net *net;
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00005516 int old;
5517
5518 if (!rtnl_trylock())
5519 return restart_syscall();
Brian Haley56d417b2009-06-01 03:07:33 -07005520
5521 net = (struct net *)table->extra2;
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00005522 old = *p;
5523 *p = newf;
Brian Haley56d417b2009-06-01 03:07:33 -07005524
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00005525 if (p == &net->ipv6.devconf_dflt->disable_ipv6) {
5526 rtnl_unlock();
Brian Haley56d417b2009-06-01 03:07:33 -07005527 return 0;
Eric W. Biederman88af1822010-02-19 13:22:59 +00005528 }
Brian Haley56d417b2009-06-01 03:07:33 -07005529
5530 if (p == &net->ipv6.devconf_all->disable_ipv6) {
Brian Haley56d417b2009-06-01 03:07:33 -07005531 net->ipv6.devconf_dflt->disable_ipv6 = newf;
5532 addrconf_disable_change(net, newf);
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00005533 } else if ((!newf) ^ (!old))
Brian Haley56d417b2009-06-01 03:07:33 -07005534 dev_disable_change((struct inet6_dev *)table->extra1);
5535
5536 rtnl_unlock();
5537 return 0;
5538}
5539
5540static
Joe Perchesfe2c6332013-06-11 23:04:25 -07005541int addrconf_sysctl_disable(struct ctl_table *ctl, int write,
Brian Haley56d417b2009-06-01 03:07:33 -07005542 void __user *buffer, size_t *lenp, loff_t *ppos)
5543{
5544 int *valp = ctl->data;
5545 int val = *valp;
Eric W. Biederman88af1822010-02-19 13:22:59 +00005546 loff_t pos = *ppos;
Joe Perchesfe2c6332013-06-11 23:04:25 -07005547 struct ctl_table lctl;
Brian Haley56d417b2009-06-01 03:07:33 -07005548 int ret;
5549
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00005550 /*
5551 * ctl->data points to idev->cnf.disable_ipv6, we should
5552 * not modify it until we get the rtnl lock.
5553 */
5554 lctl = *ctl;
5555 lctl.data = &val;
5556
5557 ret = proc_dointvec(&lctl, write, buffer, lenp, ppos);
Brian Haley56d417b2009-06-01 03:07:33 -07005558
5559 if (write)
5560 ret = addrconf_disable_ipv6(ctl, valp, val);
Eric W. Biederman88af1822010-02-19 13:22:59 +00005561 if (ret)
5562 *ppos = pos;
Brian Haley56d417b2009-06-01 03:07:33 -07005563 return ret;
5564}
5565
stephen hemmingerc92d5492013-12-17 22:37:14 -08005566static
5567int addrconf_sysctl_proxy_ndp(struct ctl_table *ctl, int write,
5568 void __user *buffer, size_t *lenp, loff_t *ppos)
5569{
5570 int *valp = ctl->data;
5571 int ret;
5572 int old, new;
5573
5574 old = *valp;
5575 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
5576 new = *valp;
5577
5578 if (write && old != new) {
5579 struct net *net = ctl->extra2;
5580
5581 if (!rtnl_trylock())
5582 return restart_syscall();
5583
5584 if (valp == &net->ipv6.devconf_dflt->proxy_ndp)
5585 inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH,
5586 NETCONFA_IFINDEX_DEFAULT,
5587 net->ipv6.devconf_dflt);
5588 else if (valp == &net->ipv6.devconf_all->proxy_ndp)
5589 inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH,
5590 NETCONFA_IFINDEX_ALL,
5591 net->ipv6.devconf_all);
5592 else {
5593 struct inet6_dev *idev = ctl->extra1;
5594
5595 inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH,
5596 idev->dev->ifindex,
5597 &idev->cnf);
5598 }
5599 rtnl_unlock();
5600 }
5601
5602 return ret;
5603}
5604
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +01005605static int addrconf_sysctl_stable_secret(struct ctl_table *ctl, int write,
5606 void __user *buffer, size_t *lenp,
5607 loff_t *ppos)
5608{
5609 int err;
5610 struct in6_addr addr;
5611 char str[IPV6_MAX_STRLEN];
5612 struct ctl_table lctl = *ctl;
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01005613 struct net *net = ctl->extra2;
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +01005614 struct ipv6_stable_secret *secret = ctl->data;
5615
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01005616 if (&net->ipv6.devconf_all->stable_secret == ctl->data)
5617 return -EIO;
5618
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +01005619 lctl.maxlen = IPV6_MAX_STRLEN;
5620 lctl.data = str;
5621
5622 if (!rtnl_trylock())
5623 return restart_syscall();
5624
5625 if (!write && !secret->initialized) {
5626 err = -EIO;
5627 goto out;
5628 }
5629
WANG Cong5449a5c2015-12-21 10:55:45 -08005630 err = snprintf(str, sizeof(str), "%pI6", &secret->secret);
5631 if (err >= sizeof(str)) {
5632 err = -EIO;
5633 goto out;
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +01005634 }
5635
5636 err = proc_dostring(&lctl, write, buffer, lenp, ppos);
5637 if (err || !write)
5638 goto out;
5639
5640 if (in6_pton(str, -1, addr.in6_u.u6_addr8, -1, NULL) != 1) {
5641 err = -EIO;
5642 goto out;
5643 }
5644
5645 secret->initialized = true;
5646 secret->secret = addr;
5647
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01005648 if (&net->ipv6.devconf_dflt->stable_secret == ctl->data) {
5649 struct net_device *dev;
5650
5651 for_each_netdev(net, dev) {
5652 struct inet6_dev *idev = __in6_dev_get(dev);
5653
5654 if (idev) {
5655 idev->addr_gen_mode =
5656 IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
5657 }
5658 }
5659 } else {
5660 struct inet6_dev *idev = ctl->extra1;
5661
5662 idev->addr_gen_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
5663 }
5664
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +01005665out:
5666 rtnl_unlock();
5667
5668 return err;
5669}
stephen hemmingerc92d5492013-12-17 22:37:14 -08005670
Andy Gospodarek35103d12015-08-13 10:39:01 -04005671static
5672int addrconf_sysctl_ignore_routes_with_linkdown(struct ctl_table *ctl,
5673 int write,
5674 void __user *buffer,
5675 size_t *lenp,
5676 loff_t *ppos)
5677{
5678 int *valp = ctl->data;
5679 int val = *valp;
5680 loff_t pos = *ppos;
5681 struct ctl_table lctl;
5682 int ret;
5683
5684 /* ctl->data points to idev->cnf.ignore_routes_when_linkdown
5685 * we should not modify it until we get the rtnl lock.
5686 */
5687 lctl = *ctl;
5688 lctl.data = &val;
5689
5690 ret = proc_dointvec(&lctl, write, buffer, lenp, ppos);
5691
5692 if (write)
5693 ret = addrconf_fixup_linkdown(ctl, valp, val);
5694 if (ret)
5695 *ppos = pos;
5696 return ret;
5697}
5698
Konstantin Khlebnikov607ea7c2016-04-18 14:41:10 +03005699static const struct ctl_table addrconf_sysctl[] = {
Konstantin Khlebnikov5df1f772016-04-18 14:41:17 +03005700 {
5701 .procname = "forwarding",
5702 .data = &ipv6_devconf.forwarding,
5703 .maxlen = sizeof(int),
5704 .mode = 0644,
5705 .proc_handler = addrconf_sysctl_forward,
5706 },
5707 {
5708 .procname = "hop_limit",
5709 .data = &ipv6_devconf.hop_limit,
5710 .maxlen = sizeof(int),
5711 .mode = 0644,
5712 .proc_handler = addrconf_sysctl_hop_limit,
5713 },
5714 {
5715 .procname = "mtu",
5716 .data = &ipv6_devconf.mtu6,
5717 .maxlen = sizeof(int),
5718 .mode = 0644,
5719 .proc_handler = addrconf_sysctl_mtu,
5720 },
5721 {
5722 .procname = "accept_ra",
5723 .data = &ipv6_devconf.accept_ra,
5724 .maxlen = sizeof(int),
5725 .mode = 0644,
5726 .proc_handler = proc_dointvec,
5727 },
5728 {
5729 .procname = "accept_redirects",
5730 .data = &ipv6_devconf.accept_redirects,
5731 .maxlen = sizeof(int),
5732 .mode = 0644,
5733 .proc_handler = proc_dointvec,
5734 },
5735 {
5736 .procname = "autoconf",
5737 .data = &ipv6_devconf.autoconf,
5738 .maxlen = sizeof(int),
5739 .mode = 0644,
5740 .proc_handler = proc_dointvec,
5741 },
5742 {
5743 .procname = "dad_transmits",
5744 .data = &ipv6_devconf.dad_transmits,
5745 .maxlen = sizeof(int),
5746 .mode = 0644,
5747 .proc_handler = proc_dointvec,
5748 },
5749 {
5750 .procname = "router_solicitations",
5751 .data = &ipv6_devconf.rtr_solicits,
5752 .maxlen = sizeof(int),
5753 .mode = 0644,
5754 .proc_handler = proc_dointvec,
5755 },
5756 {
5757 .procname = "router_solicitation_interval",
5758 .data = &ipv6_devconf.rtr_solicit_interval,
5759 .maxlen = sizeof(int),
5760 .mode = 0644,
5761 .proc_handler = proc_dointvec_jiffies,
5762 },
5763 {
5764 .procname = "router_solicitation_delay",
5765 .data = &ipv6_devconf.rtr_solicit_delay,
5766 .maxlen = sizeof(int),
5767 .mode = 0644,
5768 .proc_handler = proc_dointvec_jiffies,
5769 },
5770 {
5771 .procname = "force_mld_version",
5772 .data = &ipv6_devconf.force_mld_version,
5773 .maxlen = sizeof(int),
5774 .mode = 0644,
5775 .proc_handler = proc_dointvec,
5776 },
5777 {
5778 .procname = "mldv1_unsolicited_report_interval",
5779 .data =
5780 &ipv6_devconf.mldv1_unsolicited_report_interval,
5781 .maxlen = sizeof(int),
5782 .mode = 0644,
5783 .proc_handler = proc_dointvec_ms_jiffies,
5784 },
5785 {
5786 .procname = "mldv2_unsolicited_report_interval",
5787 .data =
5788 &ipv6_devconf.mldv2_unsolicited_report_interval,
5789 .maxlen = sizeof(int),
5790 .mode = 0644,
5791 .proc_handler = proc_dointvec_ms_jiffies,
5792 },
5793 {
5794 .procname = "use_tempaddr",
5795 .data = &ipv6_devconf.use_tempaddr,
5796 .maxlen = sizeof(int),
5797 .mode = 0644,
5798 .proc_handler = proc_dointvec,
5799 },
5800 {
5801 .procname = "temp_valid_lft",
5802 .data = &ipv6_devconf.temp_valid_lft,
5803 .maxlen = sizeof(int),
5804 .mode = 0644,
5805 .proc_handler = proc_dointvec,
5806 },
5807 {
5808 .procname = "temp_prefered_lft",
5809 .data = &ipv6_devconf.temp_prefered_lft,
5810 .maxlen = sizeof(int),
5811 .mode = 0644,
5812 .proc_handler = proc_dointvec,
5813 },
5814 {
5815 .procname = "regen_max_retry",
5816 .data = &ipv6_devconf.regen_max_retry,
5817 .maxlen = sizeof(int),
5818 .mode = 0644,
5819 .proc_handler = proc_dointvec,
5820 },
5821 {
5822 .procname = "max_desync_factor",
5823 .data = &ipv6_devconf.max_desync_factor,
5824 .maxlen = sizeof(int),
5825 .mode = 0644,
5826 .proc_handler = proc_dointvec,
5827 },
5828 {
5829 .procname = "max_addresses",
5830 .data = &ipv6_devconf.max_addresses,
5831 .maxlen = sizeof(int),
5832 .mode = 0644,
5833 .proc_handler = proc_dointvec,
5834 },
5835 {
5836 .procname = "accept_ra_defrtr",
5837 .data = &ipv6_devconf.accept_ra_defrtr,
5838 .maxlen = sizeof(int),
5839 .mode = 0644,
5840 .proc_handler = proc_dointvec,
5841 },
5842 {
5843 .procname = "accept_ra_min_hop_limit",
5844 .data = &ipv6_devconf.accept_ra_min_hop_limit,
5845 .maxlen = sizeof(int),
5846 .mode = 0644,
5847 .proc_handler = proc_dointvec,
5848 },
5849 {
5850 .procname = "accept_ra_pinfo",
5851 .data = &ipv6_devconf.accept_ra_pinfo,
5852 .maxlen = sizeof(int),
5853 .mode = 0644,
5854 .proc_handler = proc_dointvec,
5855 },
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08005856#ifdef CONFIG_IPV6_ROUTER_PREF
Konstantin Khlebnikov5df1f772016-04-18 14:41:17 +03005857 {
5858 .procname = "accept_ra_rtr_pref",
5859 .data = &ipv6_devconf.accept_ra_rtr_pref,
5860 .maxlen = sizeof(int),
5861 .mode = 0644,
5862 .proc_handler = proc_dointvec,
5863 },
5864 {
5865 .procname = "router_probe_interval",
5866 .data = &ipv6_devconf.rtr_probe_interval,
5867 .maxlen = sizeof(int),
5868 .mode = 0644,
5869 .proc_handler = proc_dointvec_jiffies,
5870 },
Neil Hormanfa03ef32007-01-30 14:30:10 -08005871#ifdef CONFIG_IPV6_ROUTE_INFO
Konstantin Khlebnikov5df1f772016-04-18 14:41:17 +03005872 {
5873 .procname = "accept_ra_rt_info_max_plen",
5874 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
5875 .maxlen = sizeof(int),
5876 .mode = 0644,
5877 .proc_handler = proc_dointvec,
5878 },
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -08005879#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08005880#endif
Konstantin Khlebnikov5df1f772016-04-18 14:41:17 +03005881 {
5882 .procname = "proxy_ndp",
5883 .data = &ipv6_devconf.proxy_ndp,
5884 .maxlen = sizeof(int),
5885 .mode = 0644,
5886 .proc_handler = addrconf_sysctl_proxy_ndp,
5887 },
5888 {
5889 .procname = "accept_source_route",
5890 .data = &ipv6_devconf.accept_source_route,
5891 .maxlen = sizeof(int),
5892 .mode = 0644,
5893 .proc_handler = proc_dointvec,
5894 },
Neil Horman95c385b2007-04-25 17:08:10 -07005895#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
Konstantin Khlebnikov5df1f772016-04-18 14:41:17 +03005896 {
5897 .procname = "optimistic_dad",
5898 .data = &ipv6_devconf.optimistic_dad,
5899 .maxlen = sizeof(int),
5900 .mode = 0644,
5901 .proc_handler = proc_dointvec,
5902 },
5903 {
5904 .procname = "use_optimistic",
5905 .data = &ipv6_devconf.use_optimistic,
5906 .maxlen = sizeof(int),
5907 .mode = 0644,
5908 .proc_handler = proc_dointvec,
5909 },
Neil Horman95c385b2007-04-25 17:08:10 -07005910#endif
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09005911#ifdef CONFIG_IPV6_MROUTE
Konstantin Khlebnikov5df1f772016-04-18 14:41:17 +03005912 {
5913 .procname = "mc_forwarding",
5914 .data = &ipv6_devconf.mc_forwarding,
5915 .maxlen = sizeof(int),
5916 .mode = 0444,
5917 .proc_handler = proc_dointvec,
5918 },
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09005919#endif
Konstantin Khlebnikov5df1f772016-04-18 14:41:17 +03005920 {
5921 .procname = "disable_ipv6",
5922 .data = &ipv6_devconf.disable_ipv6,
5923 .maxlen = sizeof(int),
5924 .mode = 0644,
5925 .proc_handler = addrconf_sysctl_disable,
5926 },
5927 {
5928 .procname = "accept_dad",
5929 .data = &ipv6_devconf.accept_dad,
5930 .maxlen = sizeof(int),
5931 .mode = 0644,
5932 .proc_handler = proc_dointvec,
5933 },
5934 {
5935 .procname = "force_tllao",
5936 .data = &ipv6_devconf.force_tllao,
5937 .maxlen = sizeof(int),
5938 .mode = 0644,
5939 .proc_handler = proc_dointvec
5940 },
5941 {
5942 .procname = "ndisc_notify",
5943 .data = &ipv6_devconf.ndisc_notify,
5944 .maxlen = sizeof(int),
5945 .mode = 0644,
5946 .proc_handler = proc_dointvec
5947 },
5948 {
5949 .procname = "suppress_frag_ndisc",
5950 .data = &ipv6_devconf.suppress_frag_ndisc,
5951 .maxlen = sizeof(int),
5952 .mode = 0644,
5953 .proc_handler = proc_dointvec
5954 },
5955 {
5956 .procname = "accept_ra_from_local",
5957 .data = &ipv6_devconf.accept_ra_from_local,
5958 .maxlen = sizeof(int),
5959 .mode = 0644,
5960 .proc_handler = proc_dointvec,
5961 },
5962 {
5963 .procname = "accept_ra_mtu",
5964 .data = &ipv6_devconf.accept_ra_mtu,
5965 .maxlen = sizeof(int),
5966 .mode = 0644,
5967 .proc_handler = proc_dointvec,
5968 },
5969 {
5970 .procname = "stable_secret",
5971 .data = &ipv6_devconf.stable_secret,
5972 .maxlen = IPV6_MAX_STRLEN,
5973 .mode = 0600,
5974 .proc_handler = addrconf_sysctl_stable_secret,
5975 },
5976 {
5977 .procname = "use_oif_addrs_only",
5978 .data = &ipv6_devconf.use_oif_addrs_only,
5979 .maxlen = sizeof(int),
5980 .mode = 0644,
5981 .proc_handler = proc_dointvec,
5982 },
5983 {
5984 .procname = "ignore_routes_with_linkdown",
5985 .data = &ipv6_devconf.ignore_routes_with_linkdown,
5986 .maxlen = sizeof(int),
5987 .mode = 0644,
5988 .proc_handler = addrconf_sysctl_ignore_routes_with_linkdown,
5989 },
5990 {
5991 .procname = "drop_unicast_in_l2_multicast",
5992 .data = &ipv6_devconf.drop_unicast_in_l2_multicast,
5993 .maxlen = sizeof(int),
5994 .mode = 0644,
5995 .proc_handler = proc_dointvec,
5996 },
5997 {
5998 .procname = "drop_unsolicited_na",
5999 .data = &ipv6_devconf.drop_unsolicited_na,
6000 .maxlen = sizeof(int),
6001 .mode = 0644,
6002 .proc_handler = proc_dointvec,
6003 },
6004 {
6005 .procname = "keep_addr_on_down",
6006 .data = &ipv6_devconf.keep_addr_on_down,
6007 .maxlen = sizeof(int),
6008 .mode = 0644,
6009 .proc_handler = proc_dointvec,
David Ahernf1705ec2016-02-24 09:25:37 -08006010
Konstantin Khlebnikov5df1f772016-04-18 14:41:17 +03006011 },
6012 {
6013 /* sentinel */
6014 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07006015};
6016
Pavel Emelyanovbff16c22008-01-10 17:42:13 -08006017static int __addrconf_sysctl_register(struct net *net, char *dev_name,
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08006018 struct inet6_dev *idev, struct ipv6_devconf *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006019{
6020 int i;
Konstantin Khlebnikov607ea7c2016-04-18 14:41:10 +03006021 struct ctl_table *table;
Eric W. Biederman6105e292012-04-19 13:41:24 +00006022 char path[sizeof("net/ipv6/conf/") + IFNAMSIZ];
Pavel Emelyanov1dab6222007-12-02 00:59:38 +11006023
Konstantin Khlebnikov607ea7c2016-04-18 14:41:10 +03006024 table = kmemdup(addrconf_sysctl, sizeof(addrconf_sysctl), GFP_KERNEL);
6025 if (!table)
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11006026 goto out;
6027
Konstantin Khlebnikov607ea7c2016-04-18 14:41:10 +03006028 for (i = 0; table[i].data; i++) {
6029 table[i].data += (char *)p - (char *)&ipv6_devconf;
6030 table[i].extra1 = idev; /* embedded; no ref */
6031 table[i].extra2 = net;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006032 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07006033
Eric W. Biederman6105e292012-04-19 13:41:24 +00006034 snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006035
Konstantin Khlebnikov607ea7c2016-04-18 14:41:10 +03006036 p->sysctl_header = register_net_sysctl(net, path, table);
6037 if (!p->sysctl_header)
Eric W. Biederman6105e292012-04-19 13:41:24 +00006038 goto free;
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11006039
Pavel Emelyanov95897312008-01-10 17:41:45 -08006040 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006041
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11006042free:
Konstantin Khlebnikov607ea7c2016-04-18 14:41:10 +03006043 kfree(table);
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11006044out:
Pavel Emelyanov95897312008-01-10 17:41:45 -08006045 return -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006046}
6047
Pavel Emelyanov408c4762008-01-10 17:41:21 -08006048static void __addrconf_sysctl_unregister(struct ipv6_devconf *p)
6049{
Konstantin Khlebnikov607ea7c2016-04-18 14:41:10 +03006050 struct ctl_table *table;
Pavel Emelyanov408c4762008-01-10 17:41:21 -08006051
Konstantin Khlebnikov607ea7c2016-04-18 14:41:10 +03006052 if (!p->sysctl_header)
Pavel Emelyanov408c4762008-01-10 17:41:21 -08006053 return;
6054
Konstantin Khlebnikov607ea7c2016-04-18 14:41:10 +03006055 table = p->sysctl_header->ctl_table_arg;
6056 unregister_net_sysctl_table(p->sysctl_header);
6057 p->sysctl_header = NULL;
6058 kfree(table);
Pavel Emelyanov408c4762008-01-10 17:41:21 -08006059}
6060
WANG Conga317a2f2014-07-25 15:25:09 -07006061static int addrconf_sysctl_register(struct inet6_dev *idev)
Pavel Emelyanovf52295a2007-12-02 00:58:37 +11006062{
WANG Conga317a2f2014-07-25 15:25:09 -07006063 int err;
6064
6065 if (!sysctl_dev_name_is_allowed(idev->dev->name))
6066 return -EINVAL;
6067
6068 err = neigh_sysctl_register(idev->dev, idev->nd_parms,
6069 &ndisc_ifinfo_sysctl_change);
6070 if (err)
6071 return err;
6072 err = __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name,
6073 idev, &idev->cnf);
6074 if (err)
6075 neigh_sysctl_unregister(idev->nd_parms);
6076
6077 return err;
Pavel Emelyanovf52295a2007-12-02 00:58:37 +11006078}
6079
Pavel Emelyanov408c4762008-01-10 17:41:21 -08006080static void addrconf_sysctl_unregister(struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006081{
Pavel Emelyanov408c4762008-01-10 17:41:21 -08006082 __addrconf_sysctl_unregister(&idev->cnf);
6083 neigh_sysctl_unregister(idev->nd_parms);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006084}
6085
6086
6087#endif
6088
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00006089static int __net_init addrconf_init_net(struct net *net)
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006090{
Hong Zhiguoa79ca222013-03-26 01:52:45 +08006091 int err = -ENOMEM;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006092 struct ipv6_devconf *all, *dflt;
6093
Hong Zhiguoa79ca222013-03-26 01:52:45 +08006094 all = kmemdup(&ipv6_devconf, sizeof(ipv6_devconf), GFP_KERNEL);
Ian Morris63159f22015-03-29 14:00:04 +01006095 if (!all)
Hong Zhiguoa79ca222013-03-26 01:52:45 +08006096 goto err_alloc_all;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006097
Hong Zhiguoa79ca222013-03-26 01:52:45 +08006098 dflt = kmemdup(&ipv6_devconf_dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL);
Ian Morris63159f22015-03-29 14:00:04 +01006099 if (!dflt)
Hong Zhiguoa79ca222013-03-26 01:52:45 +08006100 goto err_alloc_dflt;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006101
Hong Zhiguoa79ca222013-03-26 01:52:45 +08006102 /* these will be inherited by all namespaces */
6103 dflt->autoconf = ipv6_defaults.autoconf;
6104 dflt->disable_ipv6 = ipv6_defaults.disable_ipv6;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006105
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +01006106 dflt->stable_secret.initialized = false;
6107 all->stable_secret.initialized = false;
6108
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006109 net->ipv6.devconf_all = all;
6110 net->ipv6.devconf_dflt = dflt;
6111
6112#ifdef CONFIG_SYSCTL
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08006113 err = __addrconf_sysctl_register(net, "all", NULL, all);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006114 if (err < 0)
6115 goto err_reg_all;
6116
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08006117 err = __addrconf_sysctl_register(net, "default", NULL, dflt);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006118 if (err < 0)
6119 goto err_reg_dflt;
6120#endif
6121 return 0;
6122
6123#ifdef CONFIG_SYSCTL
6124err_reg_dflt:
6125 __addrconf_sysctl_unregister(all);
6126err_reg_all:
6127 kfree(dflt);
6128#endif
6129err_alloc_dflt:
6130 kfree(all);
6131err_alloc_all:
6132 return err;
6133}
6134
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00006135static void __net_exit addrconf_exit_net(struct net *net)
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006136{
6137#ifdef CONFIG_SYSCTL
6138 __addrconf_sysctl_unregister(net->ipv6.devconf_dflt);
6139 __addrconf_sysctl_unregister(net->ipv6.devconf_all);
6140#endif
zhuyj73cf0e92014-11-26 10:25:58 +08006141 kfree(net->ipv6.devconf_dflt);
6142 kfree(net->ipv6.devconf_all);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006143}
6144
6145static struct pernet_operations addrconf_ops = {
6146 .init = addrconf_init_net,
6147 .exit = addrconf_exit_net,
6148};
6149
Daniel Borkmann207895f2015-01-29 12:15:03 +01006150static struct rtnl_af_ops inet6_ops __read_mostly = {
Thomas Grafb382b192010-11-16 04:33:57 +00006151 .family = AF_INET6,
6152 .fill_link_af = inet6_fill_link_af,
6153 .get_link_af_size = inet6_get_link_af_size,
Daniel Borkmann11b1f822015-02-05 14:39:11 +01006154 .validate_link_af = inet6_validate_link_af,
Daniel Borkmannf53adae2013-04-08 04:01:30 +00006155 .set_link_af = inet6_set_link_af,
Thomas Grafb382b192010-11-16 04:33:57 +00006156};
6157
Linus Torvalds1da177e2005-04-16 15:20:36 -07006158/*
6159 * Init / cleanup code
6160 */
6161
6162int __init addrconf_init(void)
6163{
WANG Conga317a2f2014-07-25 15:25:09 -07006164 struct inet6_dev *idev;
stephen hemmingerc2e21292010-03-17 20:31:10 +00006165 int i, err;
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +09006166
Stephen Hemmingere21e8462010-03-20 16:09:01 -07006167 err = ipv6_addr_label_init();
6168 if (err < 0) {
Joe Perchesf3213832012-05-15 14:11:53 +00006169 pr_crit("%s: cannot initialize default policy table: %d\n",
6170 __func__, err);
Neil Horman2cc6d2b2010-09-24 09:55:52 +00006171 goto out;
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +09006172 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07006173
Neil Horman2cc6d2b2010-09-24 09:55:52 +00006174 err = register_pernet_subsys(&addrconf_ops);
6175 if (err < 0)
6176 goto out_addrlabel;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006177
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01006178 addrconf_wq = create_workqueue("ipv6_addrconf");
6179 if (!addrconf_wq) {
6180 err = -ENOMEM;
6181 goto out_nowq;
6182 }
6183
Linus Torvalds1da177e2005-04-16 15:20:36 -07006184 /* The addrconf netdev notifier requires that loopback_dev
6185 * has it's ipv6 private information allocated and setup
6186 * before it can bring up and give link-local addresses
6187 * to other devices which are up.
6188 *
6189 * Unfortunately, loopback_dev is not necessarily the first
6190 * entry in the global dev_base list of net devices. In fact,
6191 * it is likely to be the very last entry on that list.
6192 * So this causes the notifier registry below to try and
6193 * give link-local addresses to all devices besides loopback_dev
6194 * first, then loopback_dev, which cases all the non-loopback_dev
6195 * devices to fail to get a link-local address.
6196 *
6197 * So, as a temporary fix, allocate the ipv6 structure for
6198 * loopback_dev first by hand.
6199 * Longer term, all of the dependencies ipv6 has upon the loopback
6200 * device and it being up should be removed.
6201 */
6202 rtnl_lock();
WANG Conga317a2f2014-07-25 15:25:09 -07006203 idev = ipv6_add_dev(init_net.loopback_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006204 rtnl_unlock();
WANG Conga317a2f2014-07-25 15:25:09 -07006205 if (IS_ERR(idev)) {
6206 err = PTR_ERR(idev);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006207 goto errlo;
WANG Conga317a2f2014-07-25 15:25:09 -07006208 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07006209
stephen hemmingerc2e21292010-03-17 20:31:10 +00006210 for (i = 0; i < IN6_ADDR_HSIZE; i++)
6211 INIT_HLIST_HEAD(&inet6_addr_lst[i]);
6212
Linus Torvalds1da177e2005-04-16 15:20:36 -07006213 register_netdevice_notifier(&ipv6_dev_notf);
6214
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01006215 addrconf_verify();
Thomas Grafc127ea22007-03-22 11:58:32 -07006216
stephen hemminger3678a9d2013-12-30 10:41:32 -08006217 rtnl_af_register(&inet6_ops);
Thomas Grafb382b192010-11-16 04:33:57 +00006218
Greg Rosec7ac8672011-06-10 01:27:09 +00006219 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo,
6220 NULL);
Thomas Grafc127ea22007-03-22 11:58:32 -07006221 if (err < 0)
6222 goto errout;
6223
6224 /* Only the first call to __rtnl_register can fail */
Greg Rosec7ac8672011-06-10 01:27:09 +00006225 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL);
6226 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL);
6227 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr,
6228 inet6_dump_ifaddr, NULL);
6229 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL,
6230 inet6_dump_ifmcaddr, NULL);
6231 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL,
6232 inet6_dump_ifacaddr, NULL);
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +00006233 __rtnl_register(PF_INET6, RTM_GETNETCONF, inet6_netconf_get_devconf,
Nicolas Dichtel7a674202013-03-05 23:42:06 +00006234 inet6_netconf_dump_devconf, NULL);
Thomas Grafc127ea22007-03-22 11:58:32 -07006235
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +09006236 ipv6_addr_label_rtnl_register();
6237
Linus Torvalds1da177e2005-04-16 15:20:36 -07006238 return 0;
Thomas Grafc127ea22007-03-22 11:58:32 -07006239errout:
Thomas Grafb382b192010-11-16 04:33:57 +00006240 rtnl_af_unregister(&inet6_ops);
Thomas Grafc127ea22007-03-22 11:58:32 -07006241 unregister_netdevice_notifier(&ipv6_dev_notf);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006242errlo:
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01006243 destroy_workqueue(addrconf_wq);
6244out_nowq:
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006245 unregister_pernet_subsys(&addrconf_ops);
Neil Horman2cc6d2b2010-09-24 09:55:52 +00006246out_addrlabel:
6247 ipv6_addr_label_cleanup();
6248out:
Thomas Grafc127ea22007-03-22 11:58:32 -07006249 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006250}
6251
Daniel Lezcano09f77092007-12-13 05:34:58 -08006252void addrconf_cleanup(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006253{
Daniel Lezcano176c39a2009-03-03 01:06:45 -08006254 struct net_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006255 int i;
6256
6257 unregister_netdevice_notifier(&ipv6_dev_notf);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006258 unregister_pernet_subsys(&addrconf_ops);
Neil Horman2cc6d2b2010-09-24 09:55:52 +00006259 ipv6_addr_label_cleanup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07006260
6261 rtnl_lock();
6262
Thomas Grafb382b192010-11-16 04:33:57 +00006263 __rtnl_af_unregister(&inet6_ops);
6264
Daniel Lezcano176c39a2009-03-03 01:06:45 -08006265 /* clean dev list */
6266 for_each_netdev(&init_net, dev) {
6267 if (__in6_dev_get(dev) == NULL)
6268 continue;
6269 addrconf_ifdown(dev, 1);
6270 }
6271 addrconf_ifdown(init_net.loopback_dev, 2);
6272
Linus Torvalds1da177e2005-04-16 15:20:36 -07006273 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07006274 * Check hash table.
6275 */
stephen hemminger5c578aed2010-03-17 20:31:11 +00006276 spin_lock_bh(&addrconf_hash_lock);
stephen hemmingerc2e21292010-03-17 20:31:10 +00006277 for (i = 0; i < IN6_ADDR_HSIZE; i++)
6278 WARN_ON(!hlist_empty(&inet6_addr_lst[i]));
stephen hemminger5c578aed2010-03-17 20:31:11 +00006279 spin_unlock_bh(&addrconf_hash_lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01006280 cancel_delayed_work(&addr_chk_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006281 rtnl_unlock();
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01006282
6283 destroy_workqueue(addrconf_wq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006284}