blob: 27aed1afcf81c0a516bb6768e20b27a6794fb1cc [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 hemminger5c578ae2010-03-17 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 Hideaki52e16352006-03-20 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 Hideaki52e16352006-03-20 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;
362 ndev->cnf.sysctl = NULL;
363 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
Ian Morris63159f22015-03-29 14:00:04 +0100364 if (!ndev->nd_parms) {
Ingo Oeser322f74a2006-03-20 23:01:47 -0800365 kfree(ndev);
WANG Conga317a2f2014-07-25 15:25:09 -0700366 return ERR_PTR(err);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800367 }
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700368 if (ndev->cnf.forwarding)
369 dev_disable_lro(dev);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800370 /* We refer to the device */
371 dev_hold(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372
Ingo Oeser322f74a2006-03-20 23:01:47 -0800373 if (snmp6_alloc_dev(ndev) < 0) {
dingtianhongba3542e2013-08-17 10:27:04 +0800374 ADBG(KERN_WARNING
Joe Perchesf3213832012-05-15 14:11:53 +0000375 "%s: cannot allocate memory for statistics; dev=%s.\n",
dingtianhongba3542e2013-08-17 10:27:04 +0800376 __func__, dev->name);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800377 neigh_parms_release(&nd_tbl, ndev->nd_parms);
Roy Li8603e332011-09-20 15:10:16 -0400378 dev_put(dev);
379 kfree(ndev);
WANG Conga317a2f2014-07-25 15:25:09 -0700380 return ERR_PTR(err);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800381 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382
Ingo Oeser322f74a2006-03-20 23:01:47 -0800383 if (snmp6_register_dev(ndev) < 0) {
dingtianhongba3542e2013-08-17 10:27:04 +0800384 ADBG(KERN_WARNING
Joe Perchesf3213832012-05-15 14:11:53 +0000385 "%s: cannot create /proc/net/dev_snmp6/%s\n",
dingtianhongba3542e2013-08-17 10:27:04 +0800386 __func__, dev->name);
WANG Conga317a2f2014-07-25 15:25:09 -0700387 goto err_release;
Ingo Oeser322f74a2006-03-20 23:01:47 -0800388 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389
Ingo Oeser322f74a2006-03-20 23:01:47 -0800390 /* One reference from device. We must do this before
391 * we invoke __ipv6_regen_rndid().
392 */
393 in6_dev_hold(ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900395 if (dev->flags & (IFF_NOARP | IFF_LOOPBACK))
396 ndev->cnf.accept_dad = -1;
397
Amerigo Wang07a93622012-10-29 16:23:10 +0000398#if IS_ENABLED(CONFIG_IPV6_SIT)
YOSHIFUJI Hideakib077d7a2008-04-13 23:42:18 -0700399 if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) {
Joe Perchesf3213832012-05-15 14:11:53 +0000400 pr_info("%s: Disabled Multicast RS\n", dev->name);
YOSHIFUJI Hideakib077d7a2008-04-13 23:42:18 -0700401 ndev->cnf.rtr_solicits = 0;
402 }
403#endif
404
stephen hemminger372e6c82010-03-17 20:31:09 +0000405 INIT_LIST_HEAD(&ndev->tempaddr_list);
Pavel Emelyanovb24b8a22008-01-23 21:20:07 -0800406 setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev);
Ingo Oeser322f74a2006-03-20 23:01:47 -0800407 if ((dev->flags&IFF_LOOPBACK) ||
408 dev->type == ARPHRD_TUNNEL ||
YOSHIFUJI Hideaki9625ed72008-04-13 23:47:11 -0700409 dev->type == ARPHRD_TUNNEL6 ||
Joerg Roedel0be669b2006-10-10 14:49:53 -0700410 dev->type == ARPHRD_SIT ||
Joerg Roedel0be669b2006-10-10 14:49:53 -0700411 dev->type == ARPHRD_NONE) {
Ingo Oeser322f74a2006-03-20 23:01:47 -0800412 ndev->cnf.use_tempaddr = -1;
413 } else {
414 in6_dev_hold(ndev);
415 ipv6_regen_rndid((unsigned long) ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 }
David S. Miller5d9efa72013-10-28 20:07:50 -0400417
Daniel Borkmann914faa12013-04-09 03:47:14 +0000418 ndev->token = in6addr_any;
Ingo Oeser322f74a2006-03-20 23:01:47 -0800419
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -0700420 if (netif_running(dev) && addrconf_qdisc_ok(dev))
Herbert Xu53aadcc2007-03-27 14:31:52 -0700421 ndev->if_flags |= IF_READY;
422
Ingo Oeser322f74a2006-03-20 23:01:47 -0800423 ipv6_mc_init_dev(ndev);
424 ndev->tstamp = jiffies;
WANG Conga317a2f2014-07-25 15:25:09 -0700425 err = addrconf_sysctl_register(ndev);
426 if (err) {
427 ipv6_mc_destroy_dev(ndev);
428 del_timer(&ndev->regen_timer);
Sabrina Dubroca2a189f92015-11-04 14:47:53 +0100429 snmp6_unregister_dev(ndev);
WANG Conga317a2f2014-07-25 15:25:09 -0700430 goto err_release;
431 }
David L Stevens30c4cf52007-01-04 12:31:14 -0800432 /* protected by rtnl_lock */
Eric Dumazetcf778b02012-01-12 04:41:32 +0000433 rcu_assign_pointer(dev->ip6_ptr, ndev);
YOSHIFUJI Hideakid88ae4c2007-01-14 21:48:40 -0800434
Hannes Frederic Sowa2c5e8932013-02-10 03:50:18 +0000435 /* Join interface-local all-node multicast group */
436 ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allnodes);
437
YOSHIFUJI Hideakid88ae4c2007-01-14 21:48:40 -0800438 /* Join all-node multicast group */
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +0900439 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
YOSHIFUJI Hideakid88ae4c2007-01-14 21:48:40 -0800440
Li Weid6ddef92012-03-05 14:45:17 +0000441 /* Join all-router multicast group if forwarding is set */
Li Wei8b2aaed2012-03-07 14:58:07 +0000442 if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST))
Li Weid6ddef92012-03-05 14:45:17 +0000443 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
444
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 return ndev;
WANG Conga317a2f2014-07-25 15:25:09 -0700446
447err_release:
448 neigh_parms_release(&nd_tbl, ndev->nd_parms);
449 ndev->dead = 1;
450 in6_dev_finish_destroy(ndev);
451 return ERR_PTR(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452}
453
Eldad Zack8e5e8f32012-04-01 07:49:08 +0000454static struct inet6_dev *ipv6_find_idev(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455{
456 struct inet6_dev *idev;
457
458 ASSERT_RTNL();
459
Stephen Hemmingere21e8462010-03-20 16:09:01 -0700460 idev = __in6_dev_get(dev);
461 if (!idev) {
462 idev = ipv6_add_dev(dev);
WANG Conga317a2f2014-07-25 15:25:09 -0700463 if (IS_ERR(idev))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 return NULL;
465 }
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +0900466
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 if (dev->flags&IFF_UP)
468 ipv6_mc_up(idev);
469 return idev;
470}
471
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000472static int inet6_netconf_msgsize_devconf(int type)
473{
474 int size = NLMSG_ALIGN(sizeof(struct netconfmsg))
475 + nla_total_size(4); /* NETCONFA_IFINDEX */
Zhang Shengju136ba622016-03-10 08:55:50 +0000476 bool all = false;
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000477
Zhang Shengju136ba622016-03-10 08:55:50 +0000478 if (type == NETCONFA_ALL)
479 all = true;
480
481 if (all || type == NETCONFA_FORWARDING)
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000482 size += nla_total_size(4);
David S. Millerb1afce92012-12-04 14:46:34 -0500483#ifdef CONFIG_IPV6_MROUTE
Zhang Shengju136ba622016-03-10 08:55:50 +0000484 if (all || type == NETCONFA_MC_FORWARDING)
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000485 size += nla_total_size(4);
David S. Millerb1afce92012-12-04 14:46:34 -0500486#endif
Zhang Shengju136ba622016-03-10 08:55:50 +0000487 if (all || type == NETCONFA_PROXY_NEIGH)
stephen hemmingerc92d5492013-12-17 22:37:14 -0800488 size += nla_total_size(4);
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000489
Zhang Shengju136ba622016-03-10 08:55:50 +0000490 if (all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN)
Andy Gospodarek35103d12015-08-13 10:39:01 -0400491 size += nla_total_size(4);
492
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000493 return size;
494}
495
496static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex,
497 struct ipv6_devconf *devconf, u32 portid,
498 u32 seq, int event, unsigned int flags,
499 int type)
500{
501 struct nlmsghdr *nlh;
502 struct netconfmsg *ncm;
Zhang Shengju136ba622016-03-10 08:55:50 +0000503 bool all = false;
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000504
505 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg),
506 flags);
Ian Morris63159f22015-03-29 14:00:04 +0100507 if (!nlh)
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000508 return -EMSGSIZE;
509
Zhang Shengju136ba622016-03-10 08:55:50 +0000510 if (type == NETCONFA_ALL)
511 all = true;
512
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000513 ncm = nlmsg_data(nlh);
514 ncm->ncm_family = AF_INET6;
515
516 if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0)
517 goto nla_put_failure;
518
Zhang Shengju136ba622016-03-10 08:55:50 +0000519 if ((all || type == NETCONFA_FORWARDING) &&
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000520 nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0)
521 goto nla_put_failure;
David S. Millerb1afce92012-12-04 14:46:34 -0500522#ifdef CONFIG_IPV6_MROUTE
Zhang Shengju136ba622016-03-10 08:55:50 +0000523 if ((all || type == NETCONFA_MC_FORWARDING) &&
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000524 nla_put_s32(skb, NETCONFA_MC_FORWARDING,
525 devconf->mc_forwarding) < 0)
526 goto nla_put_failure;
David S. Millerb1afce92012-12-04 14:46:34 -0500527#endif
Zhang Shengju136ba622016-03-10 08:55:50 +0000528 if ((all || type == NETCONFA_PROXY_NEIGH) &&
stephen hemmingerc92d5492013-12-17 22:37:14 -0800529 nla_put_s32(skb, NETCONFA_PROXY_NEIGH, devconf->proxy_ndp) < 0)
530 goto nla_put_failure;
531
Zhang Shengju136ba622016-03-10 08:55:50 +0000532 if ((all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) &&
Andy Gospodarek35103d12015-08-13 10:39:01 -0400533 nla_put_s32(skb, NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN,
534 devconf->ignore_routes_with_linkdown) < 0)
535 goto nla_put_failure;
536
Johannes Berg053c0952015-01-16 22:09:00 +0100537 nlmsg_end(skb, nlh);
538 return 0;
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000539
540nla_put_failure:
541 nlmsg_cancel(skb, nlh);
542 return -EMSGSIZE;
543}
544
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000545void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
546 struct ipv6_devconf *devconf)
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000547{
548 struct sk_buff *skb;
549 int err = -ENOBUFS;
550
551 skb = nlmsg_new(inet6_netconf_msgsize_devconf(type), GFP_ATOMIC);
Ian Morris63159f22015-03-29 14:00:04 +0100552 if (!skb)
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000553 goto errout;
554
555 err = inet6_netconf_fill_devconf(skb, ifindex, devconf, 0, 0,
556 RTM_NEWNETCONF, 0, type);
557 if (err < 0) {
558 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
559 WARN_ON(err == -EMSGSIZE);
560 kfree_skb(skb);
561 goto errout;
562 }
563 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_NETCONF, NULL, GFP_ATOMIC);
564 return;
565errout:
Cong Dingbd779022012-12-18 12:08:56 +0000566 rtnl_set_sk_err(net, RTNLGRP_IPV6_NETCONF, err);
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000567}
568
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000569static const struct nla_policy devconf_ipv6_policy[NETCONFA_MAX+1] = {
570 [NETCONFA_IFINDEX] = { .len = sizeof(int) },
571 [NETCONFA_FORWARDING] = { .len = sizeof(int) },
stephen hemmingerc92d5492013-12-17 22:37:14 -0800572 [NETCONFA_PROXY_NEIGH] = { .len = sizeof(int) },
Andy Gospodarek35103d12015-08-13 10:39:01 -0400573 [NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN] = { .len = sizeof(int) },
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000574};
575
576static int inet6_netconf_get_devconf(struct sk_buff *in_skb,
Thomas Graf661d2962013-03-21 07:45:29 +0000577 struct nlmsghdr *nlh)
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000578{
579 struct net *net = sock_net(in_skb->sk);
580 struct nlattr *tb[NETCONFA_MAX+1];
581 struct netconfmsg *ncm;
582 struct sk_buff *skb;
583 struct ipv6_devconf *devconf;
584 struct inet6_dev *in6_dev;
585 struct net_device *dev;
586 int ifindex;
587 int err;
588
589 err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX,
590 devconf_ipv6_policy);
591 if (err < 0)
592 goto errout;
593
Anton Protopopova97eb332016-02-16 21:43:16 -0500594 err = -EINVAL;
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000595 if (!tb[NETCONFA_IFINDEX])
596 goto errout;
597
598 ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]);
599 switch (ifindex) {
600 case NETCONFA_IFINDEX_ALL:
601 devconf = net->ipv6.devconf_all;
602 break;
603 case NETCONFA_IFINDEX_DEFAULT:
604 devconf = net->ipv6.devconf_dflt;
605 break;
606 default:
607 dev = __dev_get_by_index(net, ifindex);
Ian Morris63159f22015-03-29 14:00:04 +0100608 if (!dev)
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000609 goto errout;
610 in6_dev = __in6_dev_get(dev);
Ian Morris63159f22015-03-29 14:00:04 +0100611 if (!in6_dev)
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000612 goto errout;
613 devconf = &in6_dev->cnf;
614 break;
615 }
616
617 err = -ENOBUFS;
Zhang Shengju136ba622016-03-10 08:55:50 +0000618 skb = nlmsg_new(inet6_netconf_msgsize_devconf(NETCONFA_ALL), GFP_ATOMIC);
Ian Morris63159f22015-03-29 14:00:04 +0100619 if (!skb)
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000620 goto errout;
621
622 err = inet6_netconf_fill_devconf(skb, ifindex, devconf,
623 NETLINK_CB(in_skb).portid,
624 nlh->nlmsg_seq, RTM_NEWNETCONF, 0,
Zhang Shengju136ba622016-03-10 08:55:50 +0000625 NETCONFA_ALL);
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +0000626 if (err < 0) {
627 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
628 WARN_ON(err == -EMSGSIZE);
629 kfree_skb(skb);
630 goto errout;
631 }
632 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
633errout:
634 return err;
635}
636
Nicolas Dichtel7a674202013-03-05 23:42:06 +0000637static int inet6_netconf_dump_devconf(struct sk_buff *skb,
638 struct netlink_callback *cb)
639{
640 struct net *net = sock_net(skb->sk);
641 int h, s_h;
642 int idx, s_idx;
643 struct net_device *dev;
644 struct inet6_dev *idev;
645 struct hlist_head *head;
646
647 s_h = cb->args[0];
648 s_idx = idx = cb->args[1];
649
650 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
651 idx = 0;
652 head = &net->dev_index_head[h];
653 rcu_read_lock();
Nicolas Dichtel63998ac2013-03-22 06:28:43 +0000654 cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^
655 net->dev_base_seq;
Nicolas Dichtel7a674202013-03-05 23:42:06 +0000656 hlist_for_each_entry_rcu(dev, head, index_hlist) {
657 if (idx < s_idx)
658 goto cont;
659 idev = __in6_dev_get(dev);
660 if (!idev)
661 goto cont;
662
663 if (inet6_netconf_fill_devconf(skb, dev->ifindex,
664 &idev->cnf,
665 NETLINK_CB(cb->skb).portid,
666 cb->nlh->nlmsg_seq,
667 RTM_NEWNETCONF,
668 NLM_F_MULTI,
Zhang Shengju136ba622016-03-10 08:55:50 +0000669 NETCONFA_ALL) < 0) {
Nicolas Dichtel7a674202013-03-05 23:42:06 +0000670 rcu_read_unlock();
671 goto done;
672 }
Nicolas Dichtel63998ac2013-03-22 06:28:43 +0000673 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
Nicolas Dichtel7a674202013-03-05 23:42:06 +0000674cont:
675 idx++;
676 }
677 rcu_read_unlock();
678 }
679 if (h == NETDEV_HASHENTRIES) {
680 if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL,
681 net->ipv6.devconf_all,
682 NETLINK_CB(cb->skb).portid,
683 cb->nlh->nlmsg_seq,
684 RTM_NEWNETCONF, NLM_F_MULTI,
Zhang Shengju136ba622016-03-10 08:55:50 +0000685 NETCONFA_ALL) < 0)
Nicolas Dichtel7a674202013-03-05 23:42:06 +0000686 goto done;
687 else
688 h++;
689 }
690 if (h == NETDEV_HASHENTRIES + 1) {
691 if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT,
692 net->ipv6.devconf_dflt,
693 NETLINK_CB(cb->skb).portid,
694 cb->nlh->nlmsg_seq,
695 RTM_NEWNETCONF, NLM_F_MULTI,
Zhang Shengju136ba622016-03-10 08:55:50 +0000696 NETCONFA_ALL) < 0)
Nicolas Dichtel7a674202013-03-05 23:42:06 +0000697 goto done;
698 else
699 h++;
700 }
701done:
702 cb->args[0] = h;
703 cb->args[1] = idx;
704
705 return skb->len;
706}
707
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708#ifdef CONFIG_SYSCTL
709static void dev_forward_change(struct inet6_dev *idev)
710{
711 struct net_device *dev;
712 struct inet6_ifaddr *ifa;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713
714 if (!idev)
715 return;
716 dev = idev->dev;
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700717 if (idev->cnf.forwarding)
718 dev_disable_lro(dev);
Amerigo Wang1a940832012-10-28 17:43:53 +0000719 if (dev->flags & IFF_MULTICAST) {
Hannes Frederic Sowa2c5e8932013-02-10 03:50:18 +0000720 if (idev->cnf.forwarding) {
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +0900721 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
Hannes Frederic Sowa2c5e8932013-02-10 03:50:18 +0000722 ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allrouters);
723 ipv6_dev_mc_inc(dev, &in6addr_sitelocal_allrouters);
724 } else {
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +0900725 ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters);
Hannes Frederic Sowa2c5e8932013-02-10 03:50:18 +0000726 ipv6_dev_mc_dec(dev, &in6addr_interfacelocal_allrouters);
727 ipv6_dev_mc_dec(dev, &in6addr_sitelocal_allrouters);
728 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 }
stephen hemminger502a2ff2010-03-17 20:31:13 +0000730
731 list_for_each_entry(ifa, &idev->addr_list, if_list) {
Michal Wrobel2c12a742007-02-26 15:36:10 -0800732 if (ifa->flags&IFA_F_TENTATIVE)
733 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734 if (idev->cnf.forwarding)
735 addrconf_join_anycast(ifa);
736 else
737 addrconf_leave_anycast(ifa);
738 }
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000739 inet6_netconf_notify_devconf(dev_net(dev), NETCONFA_FORWARDING,
740 dev->ifindex, &idev->cnf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741}
742
743
Pavel Emelyanove1869322008-01-10 17:43:50 -0800744static void addrconf_forward_change(struct net *net, __s32 newf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745{
746 struct net_device *dev;
747 struct inet6_dev *idev;
748
Ben Hutchings4acd4942012-08-14 08:54:51 +0000749 for_each_netdev(net, dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750 idev = __in6_dev_get(dev);
751 if (idev) {
Pavel Emelyanove1869322008-01-10 17:43:50 -0800752 int changed = (!idev->cnf.forwarding) ^ (!newf);
753 idev->cnf.forwarding = newf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 if (changed)
755 dev_forward_change(idev);
756 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758}
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800759
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000760static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf)
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800761{
Pavel Emelyanovbff16c22008-01-10 17:42:13 -0800762 struct net *net;
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000763 int old;
764
765 if (!rtnl_trylock())
766 return restart_syscall();
Pavel Emelyanovbff16c22008-01-10 17:42:13 -0800767
768 net = (struct net *)table->extra2;
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000769 old = *p;
770 *p = newf;
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800771
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000772 if (p == &net->ipv6.devconf_dflt->forwarding) {
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000773 if ((!newf) ^ (!old))
774 inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING,
775 NETCONFA_IFINDEX_DEFAULT,
776 net->ipv6.devconf_dflt);
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000777 rtnl_unlock();
778 return 0;
Eric W. Biederman88af1822010-02-19 13:22:59 +0000779 }
Stephen Hemmingerb325fdd2009-02-26 06:55:31 +0000780
Pavel Emelyanove1869322008-01-10 17:43:50 -0800781 if (p == &net->ipv6.devconf_all->forwarding) {
Pavel Emelyanove1869322008-01-10 17:43:50 -0800782 net->ipv6.devconf_dflt->forwarding = newf;
783 addrconf_forward_change(net, newf);
Nicolas Dichtelf3a1bfb2012-10-25 22:28:50 +0000784 if ((!newf) ^ (!old))
785 inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING,
786 NETCONFA_IFINDEX_ALL,
787 net->ipv6.devconf_all);
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000788 } else if ((!newf) ^ (!old))
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800789 dev_forward_change((struct inet6_dev *)table->extra1);
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700790 rtnl_unlock();
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800791
Francesco Ruggeri013d97e2012-01-16 10:40:10 +0000792 if (newf)
Daniel Lezcano7b4da532008-03-04 13:47:14 -0800793 rt6_purge_dflt_routers(net);
Stephen Hemmingerb325fdd2009-02-26 06:55:31 +0000794 return 1;
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -0800795}
Andy Gospodarek35103d12015-08-13 10:39:01 -0400796
797static void addrconf_linkdown_change(struct net *net, __s32 newf)
798{
799 struct net_device *dev;
800 struct inet6_dev *idev;
801
802 for_each_netdev(net, dev) {
803 idev = __in6_dev_get(dev);
804 if (idev) {
805 int changed = (!idev->cnf.ignore_routes_with_linkdown) ^ (!newf);
806
807 idev->cnf.ignore_routes_with_linkdown = newf;
808 if (changed)
809 inet6_netconf_notify_devconf(dev_net(dev),
810 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN,
811 dev->ifindex,
812 &idev->cnf);
813 }
814 }
815}
816
817static int addrconf_fixup_linkdown(struct ctl_table *table, int *p, int newf)
818{
819 struct net *net;
820 int old;
821
822 if (!rtnl_trylock())
823 return restart_syscall();
824
825 net = (struct net *)table->extra2;
826 old = *p;
827 *p = newf;
828
829 if (p == &net->ipv6.devconf_dflt->ignore_routes_with_linkdown) {
830 if ((!newf) ^ (!old))
831 inet6_netconf_notify_devconf(net,
832 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN,
833 NETCONFA_IFINDEX_DEFAULT,
834 net->ipv6.devconf_dflt);
835 rtnl_unlock();
836 return 0;
837 }
838
839 if (p == &net->ipv6.devconf_all->ignore_routes_with_linkdown) {
840 net->ipv6.devconf_dflt->ignore_routes_with_linkdown = newf;
841 addrconf_linkdown_change(net, newf);
842 if ((!newf) ^ (!old))
843 inet6_netconf_notify_devconf(net,
844 NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN,
845 NETCONFA_IFINDEX_ALL,
846 net->ipv6.devconf_all);
847 }
848 rtnl_unlock();
849
850 return 1;
851}
852
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853#endif
854
stephen hemminger5c578ae2010-03-17 20:31:11 +0000855/* Nobody refers to this ifaddr, destroy it */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
857{
stephen hemmingerc2e21292010-03-17 20:31:10 +0000858 WARN_ON(!hlist_unhashed(&ifp->addr_lst));
Ilpo Järvinen547b7922008-07-25 21:43:18 -0700859
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860#ifdef NET_REFCNT_DEBUG
Joe Perches91df42b2012-05-15 14:11:54 +0000861 pr_debug("%s\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862#endif
863
864 in6_dev_put(ifp->idev);
865
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +0100866 if (cancel_delayed_work(&ifp->dad_work))
867 pr_notice("delayed DAD work was pending while freeing ifa=%p\n",
868 ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869
Herbert Xue9d3e082010-05-18 15:36:06 -0700870 if (ifp->state != INET6_IFADDR_STATE_DEAD) {
Joe Perchesf3213832012-05-15 14:11:53 +0000871 pr_warn("Freeing alive inet6 address %p\n", ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872 return;
873 }
Amerigo Wang94e187c2012-10-29 00:13:19 +0000874 ip6_rt_put(ifp->rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875
Lai Jiangshane5785982011-03-15 18:00:14 +0800876 kfree_rcu(ifp, rcu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877}
878
Brian Haleye55ffac2006-07-10 15:25:51 -0700879static void
880ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
881{
stephen hemminger502a2ff2010-03-17 20:31:13 +0000882 struct list_head *p;
YOSHIFUJI Hideaki8a6ce0c2006-07-11 13:05:30 -0700883 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
Brian Haleye55ffac2006-07-10 15:25:51 -0700884
885 /*
886 * Each device address list is sorted in order of scope -
887 * global before linklocal.
888 */
stephen hemminger502a2ff2010-03-17 20:31:13 +0000889 list_for_each(p, &idev->addr_list) {
890 struct inet6_ifaddr *ifa
891 = list_entry(p, struct inet6_ifaddr, if_list);
YOSHIFUJI Hideaki8a6ce0c2006-07-11 13:05:30 -0700892 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
Brian Haleye55ffac2006-07-10 15:25:51 -0700893 break;
894 }
895
David S. Millerb54c9b92010-03-25 21:25:30 -0700896 list_add_tail(&ifp->if_list, p);
Brian Haleye55ffac2006-07-10 15:25:51 -0700897}
898
Eric Dumazetddbe5032012-07-18 08:11:12 +0000899static u32 inet6_addr_hash(const struct in6_addr *addr)
YOSHIFUJI Hideaki3eb84f42008-04-10 15:42:08 +0900900{
Eric Dumazetddbe5032012-07-18 08:11:12 +0000901 return hash_32(ipv6_addr_hash(addr), IN6_ADDR_HSIZE_SHIFT);
YOSHIFUJI Hideaki3eb84f42008-04-10 15:42:08 +0900902}
903
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904/* On success it returns ifp with increased reference count */
905
906static struct inet6_ifaddr *
Jiri Pirko3f8f5292013-08-01 10:41:27 +0200907ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
908 const struct in6_addr *peer_addr, int pfxlen,
Jiri Benc8a226b22013-08-01 10:41:28 +0200909 int scope, u32 flags, u32 valid_lft, u32 prefered_lft)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910{
911 struct inet6_ifaddr *ifa = NULL;
912 struct rt6_info *rt;
stephen hemminger3a88a812010-03-17 20:31:12 +0000913 unsigned int hash;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914 int err = 0;
YOSHIFUJI Hideakid68b8272008-06-25 16:26:47 +0900915 int addr_type = ipv6_addr_type(addr);
916
917 if (addr_type == IPV6_ADDR_ANY ||
918 addr_type & IPV6_ADDR_MULTICAST ||
919 (!(idev->dev->flags & IFF_LOOPBACK) &&
920 addr_type & IPV6_ADDR_LOOPBACK))
921 return ERR_PTR(-EADDRNOTAVAIL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700923 rcu_read_lock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924 if (idev->dead) {
925 err = -ENODEV; /*XXX*/
926 goto out2;
927 }
928
Brian Haley56d417b2009-06-01 03:07:33 -0700929 if (idev->cnf.disable_ipv6) {
Brian Haley9bdd8d42009-03-18 18:22:48 -0700930 err = -EACCES;
931 goto out2;
932 }
933
stephen hemminger5c578ae2010-03-17 20:31:11 +0000934 spin_lock(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935
936 /* Ignore adding duplicate addresses on an interface */
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900937 if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) {
dingtianhongba3542e2013-08-17 10:27:04 +0800938 ADBG("ipv6_add_addr: already assigned\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939 err = -EEXIST;
940 goto out;
941 }
942
Ingo Oeser322f74a2006-03-20 23:01:47 -0800943 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944
Ian Morris63159f22015-03-29 14:00:04 +0100945 if (!ifa) {
dingtianhongba3542e2013-08-17 10:27:04 +0800946 ADBG("ipv6_add_addr: malloc failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947 err = -ENOBUFS;
948 goto out;
949 }
950
David S. Miller8f031512011-12-06 16:48:14 -0500951 rt = addrconf_dst_alloc(idev, addr, false);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952 if (IS_ERR(rt)) {
953 err = PTR_ERR(rt);
954 goto out;
955 }
956
Jiri Pirkobba24892013-12-07 19:26:57 +0100957 neigh_parms_data_state_setall(idev->nd_parms);
958
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000959 ifa->addr = *addr;
Jiri Pirko3f8f5292013-08-01 10:41:27 +0200960 if (peer_addr)
961 ifa->peer_addr = *peer_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962
963 spin_lock_init(&ifa->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +0100964 INIT_DELAYED_WORK(&ifa->dad_work, addrconf_dad_work);
stephen hemmingerc2e21292010-03-17 20:31:10 +0000965 INIT_HLIST_NODE(&ifa->addr_lst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966 ifa->scope = scope;
967 ifa->prefix_len = pfxlen;
968 ifa->flags = flags | IFA_F_TENTATIVE;
Jiri Benc8a226b22013-08-01 10:41:28 +0200969 ifa->valid_lft = valid_lft;
970 ifa->prefered_lft = prefered_lft;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971 ifa->cstamp = ifa->tstamp = jiffies;
Daniel Borkmann617fe292013-04-09 03:47:16 +0000972 ifa->tokenized = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973
Keir Fraser57f5f542006-08-29 02:43:49 -0700974 ifa->rt = rt;
975
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976 ifa->idev = idev;
977 in6_dev_hold(idev);
978 /* For caller */
979 in6_ifa_hold(ifa);
980
981 /* Add to big hash table */
Eric Dumazetddbe5032012-07-18 08:11:12 +0000982 hash = inet6_addr_hash(addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983
stephen hemminger5c578ae2010-03-17 20:31:11 +0000984 hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]);
stephen hemminger5c578ae2010-03-17 20:31:11 +0000985 spin_unlock(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986
987 write_lock(&idev->lock);
988 /* Add to inet6_dev unicast addr list. */
Brian Haleye55ffac2006-07-10 15:25:51 -0700989 ipv6_link_dev_addr(idev, ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 if (ifa->flags&IFA_F_TEMPORARY) {
stephen hemminger372e6c82010-03-17 20:31:09 +0000992 list_add(&ifa->tmp_list, &idev->tempaddr_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993 in6_ifa_hold(ifa);
994 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996 in6_ifa_hold(ifa);
997 write_unlock(&idev->lock);
998out2:
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700999 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000
YOSHIFUJI Hideakifd928332005-04-19 22:27:09 -07001001 if (likely(err == 0))
Cong Wangf88c91d2013-04-14 23:18:43 +08001002 inet6addr_notifier_call_chain(NETDEV_UP, ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003 else {
1004 kfree(ifa);
1005 ifa = ERR_PTR(err);
1006 }
1007
1008 return ifa;
1009out:
stephen hemminger5c578ae2010-03-17 20:31:11 +00001010 spin_unlock(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001011 goto out2;
1012}
1013
Thomas Haller5b84efe2014-01-15 15:36:59 +01001014enum cleanup_prefix_rt_t {
1015 CLEANUP_PREFIX_RT_NOP, /* no cleanup action for prefix route */
1016 CLEANUP_PREFIX_RT_DEL, /* delete the prefix route */
1017 CLEANUP_PREFIX_RT_EXPIRE, /* update the lifetime of the prefix route */
1018};
1019
1020/*
1021 * Check, whether the prefix for ifp would still need a prefix route
1022 * after deleting ifp. The function returns one of the CLEANUP_PREFIX_RT_*
1023 * constants.
1024 *
1025 * 1) we don't purge prefix if address was not permanent.
1026 * prefix is managed by its own lifetime.
1027 * 2) we also don't purge, if the address was IFA_F_NOPREFIXROUTE.
1028 * 3) if there are no addresses, delete prefix.
1029 * 4) if there are still other permanent address(es),
1030 * corresponding prefix is still permanent.
1031 * 5) if there are still other addresses with IFA_F_NOPREFIXROUTE,
1032 * don't purge the prefix, assume user space is managing it.
1033 * 6) otherwise, update prefix lifetime to the
1034 * longest valid lifetime among the corresponding
1035 * addresses on the device.
1036 * Note: subsequent RA will update lifetime.
1037 **/
1038static enum cleanup_prefix_rt_t
1039check_cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long *expires)
1040{
1041 struct inet6_ifaddr *ifa;
1042 struct inet6_dev *idev = ifp->idev;
1043 unsigned long lifetime;
1044 enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_DEL;
1045
1046 *expires = jiffies;
1047
1048 list_for_each_entry(ifa, &idev->addr_list, if_list) {
1049 if (ifa == ifp)
1050 continue;
1051 if (!ipv6_prefix_equal(&ifa->addr, &ifp->addr,
1052 ifp->prefix_len))
1053 continue;
1054 if (ifa->flags & (IFA_F_PERMANENT | IFA_F_NOPREFIXROUTE))
1055 return CLEANUP_PREFIX_RT_NOP;
1056
1057 action = CLEANUP_PREFIX_RT_EXPIRE;
1058
1059 spin_lock(&ifa->lock);
1060
1061 lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ);
1062 /*
1063 * Note: Because this address is
1064 * not permanent, lifetime <
1065 * LONG_MAX / HZ here.
1066 */
1067 if (time_before(*expires, ifa->tstamp + lifetime * HZ))
1068 *expires = ifa->tstamp + lifetime * HZ;
1069 spin_unlock(&ifa->lock);
1070 }
1071
1072 return action;
1073}
1074
1075static void
1076cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long expires, bool del_rt)
1077{
1078 struct rt6_info *rt;
1079
1080 rt = addrconf_get_prefix_route(&ifp->addr,
1081 ifp->prefix_len,
1082 ifp->idev->dev,
1083 0, RTF_GATEWAY | RTF_DEFAULT);
1084 if (rt) {
1085 if (del_rt)
1086 ip6_del_rt(rt);
1087 else {
1088 if (!(rt->rt6i_flags & RTF_EXPIRES))
1089 rt6_set_expires(rt, expires);
1090 ip6_rt_put(rt);
1091 }
1092 }
1093}
1094
1095
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096/* This function wants to get referenced ifp and releases it before return */
1097
1098static void ipv6_del_addr(struct inet6_ifaddr *ifp)
1099{
Herbert Xu4c5ff6a2010-05-18 15:54:18 -07001100 int state;
Thomas Haller5b84efe2014-01-15 15:36:59 +01001101 enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_NOP;
1102 unsigned long expires;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01001104 ASSERT_RTNL();
1105
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01001106 spin_lock_bh(&ifp->lock);
Herbert Xu4c5ff6a2010-05-18 15:54:18 -07001107 state = ifp->state;
Herbert Xue9d3e082010-05-18 15:36:06 -07001108 ifp->state = INET6_IFADDR_STATE_DEAD;
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01001109 spin_unlock_bh(&ifp->lock);
Herbert Xu4c5ff6a2010-05-18 15:54:18 -07001110
1111 if (state == INET6_IFADDR_STATE_DEAD)
1112 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113
stephen hemminger5c578ae2010-03-17 20:31:11 +00001114 spin_lock_bh(&addrconf_hash_lock);
1115 hlist_del_init_rcu(&ifp->addr_lst);
stephen hemminger5c578ae2010-03-17 20:31:11 +00001116 spin_unlock_bh(&addrconf_hash_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117
Thomas Haller5b84efe2014-01-15 15:36:59 +01001118 write_lock_bh(&ifp->idev->lock);
David S. Miller5d9efa72013-10-28 20:07:50 -04001119
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120 if (ifp->flags&IFA_F_TEMPORARY) {
stephen hemminger372e6c82010-03-17 20:31:09 +00001121 list_del(&ifp->tmp_list);
1122 if (ifp->ifpub) {
1123 in6_ifa_put(ifp->ifpub);
1124 ifp->ifpub = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125 }
stephen hemminger372e6c82010-03-17 20:31:09 +00001126 __in6_ifa_put(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128
Thomas Haller5b84efe2014-01-15 15:36:59 +01001129 if (ifp->flags & IFA_F_PERMANENT && !(ifp->flags & IFA_F_NOPREFIXROUTE))
1130 action = check_cleanup_prefix_route(ifp, &expires);
stephen hemminger502a2ff2010-03-17 20:31:13 +00001131
Thomas Haller5b84efe2014-01-15 15:36:59 +01001132 list_del_init(&ifp->if_list);
1133 __in6_ifa_put(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134
Thomas Haller5b84efe2014-01-15 15:36:59 +01001135 write_unlock_bh(&ifp->idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01001137 addrconf_del_dad_work(ifp);
Andrey Vaginb2238562008-07-08 15:13:31 -07001138
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139 ipv6_ifa_notify(RTM_DELADDR, ifp);
1140
Cong Wangf88c91d2013-04-14 23:18:43 +08001141 inet6addr_notifier_call_chain(NETDEV_DOWN, ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142
Thomas Haller5b84efe2014-01-15 15:36:59 +01001143 if (action != CLEANUP_PREFIX_RT_NOP) {
1144 cleanup_prefix_route(ifp, expires,
1145 action == CLEANUP_PREFIX_RT_DEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146 }
1147
Daniel Walterc3968a82011-04-13 21:10:57 +00001148 /* clean up prefsrc entries */
1149 rt6_remove_prefsrc(ifp);
Herbert Xu4c5ff6a2010-05-18 15:54:18 -07001150out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151 in6_ifa_put(ifp);
1152}
1153
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
1155{
1156 struct inet6_dev *idev = ifp->idev;
1157 struct in6_addr addr, *tmpaddr;
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00001158 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age;
Benoit Boissinoteac55bf2008-04-02 00:01:35 -07001159 unsigned long regen_advance;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160 int tmp_plen;
1161 int ret = 0;
Neil Horman95c385b2007-04-25 17:08:10 -07001162 u32 addr_flags;
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00001163 unsigned long now = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164
Jiri Pirko53bd6742013-12-06 09:45:22 +01001165 write_lock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166 if (ift) {
1167 spin_lock_bh(&ift->lock);
1168 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
1169 spin_unlock_bh(&ift->lock);
1170 tmpaddr = &addr;
1171 } else {
1172 tmpaddr = NULL;
1173 }
1174retry:
1175 in6_dev_hold(idev);
1176 if (idev->cnf.use_tempaddr <= 0) {
Jiri Pirko53bd6742013-12-06 09:45:22 +01001177 write_unlock_bh(&idev->lock);
Joe Perchesf3213832012-05-15 14:11:53 +00001178 pr_info("%s: use_tempaddr is disabled\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179 in6_dev_put(idev);
1180 ret = -1;
1181 goto out;
1182 }
1183 spin_lock_bh(&ifp->lock);
1184 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
1185 idev->cnf.use_tempaddr = -1; /*XXX*/
1186 spin_unlock_bh(&ifp->lock);
Jiri Pirko53bd6742013-12-06 09:45:22 +01001187 write_unlock_bh(&idev->lock);
Joe Perchesf3213832012-05-15 14:11:53 +00001188 pr_warn("%s: regeneration time exceeded - disabled temporary address support\n",
1189 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190 in6_dev_put(idev);
1191 ret = -1;
1192 goto out;
1193 }
1194 in6_ifa_hold(ifp);
1195 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00001196 __ipv6_try_regen_rndid(idev, tmpaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197 memcpy(&addr.s6_addr[8], idev->rndid, 8);
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00001198 age = (now - ifp->tstamp) / HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199 tmp_valid_lft = min_t(__u32,
1200 ifp->valid_lft,
Glenn Wurster7a876b02010-09-27 07:10:10 +00001201 idev->cnf.temp_valid_lft + age);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001202 tmp_prefered_lft = min_t(__u32,
1203 ifp->prefered_lft,
Glenn Wurster7a876b02010-09-27 07:10:10 +00001204 idev->cnf.temp_prefered_lft + age -
Ben Hutchings784e2712010-06-26 11:42:55 +00001205 idev->cnf.max_desync_factor);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206 tmp_plen = ifp->prefix_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207 tmp_tstamp = ifp->tstamp;
1208 spin_unlock_bh(&ifp->lock);
1209
Benoit Boissinoteac55bf2008-04-02 00:01:35 -07001210 regen_advance = idev->cnf.regen_max_retry *
Ian Morris67ba4152014-08-24 21:53:10 +01001211 idev->cnf.dad_transmits *
1212 NEIGH_VAR(idev->nd_parms, RETRANS_TIME) / HZ;
Jiri Pirko53bd6742013-12-06 09:45:22 +01001213 write_unlock_bh(&idev->lock);
Neil Horman95c385b2007-04-25 17:08:10 -07001214
Benoit Boissinoteac55bf2008-04-02 00:01:35 -07001215 /* A temporary address is created only if this calculated Preferred
1216 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
1217 * an implementation must not create a temporary address with a zero
1218 * Preferred Lifetime.
Heiner Kallweitecab6702014-03-12 22:13:19 +01001219 * Use age calculation as in addrconf_verify to avoid unnecessary
1220 * temporary addresses being generated.
Benoit Boissinoteac55bf2008-04-02 00:01:35 -07001221 */
Heiner Kallweitecab6702014-03-12 22:13:19 +01001222 age = (now - tmp_tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ;
1223 if (tmp_prefered_lft <= regen_advance + age) {
Benoit Boissinoteac55bf2008-04-02 00:01:35 -07001224 in6_ifa_put(ifp);
1225 in6_dev_put(idev);
1226 ret = -1;
1227 goto out;
1228 }
1229
Neil Horman95c385b2007-04-25 17:08:10 -07001230 addr_flags = IFA_F_TEMPORARY;
1231 /* set in addrconf_prefix_rcv() */
1232 if (ifp->flags & IFA_F_OPTIMISTIC)
1233 addr_flags |= IFA_F_OPTIMISTIC;
1234
Hannes Frederic Sowa4b08a8f2013-08-16 13:02:27 +02001235 ift = ipv6_add_addr(idev, &addr, NULL, tmp_plen,
1236 ipv6_addr_scope(&addr), addr_flags,
1237 tmp_valid_lft, tmp_prefered_lft);
1238 if (IS_ERR(ift)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239 in6_ifa_put(ifp);
1240 in6_dev_put(idev);
Joe Perchesf3213832012-05-15 14:11:53 +00001241 pr_info("%s: retry temporary address regeneration\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242 tmpaddr = &addr;
Jiri Pirko53bd6742013-12-06 09:45:22 +01001243 write_lock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244 goto retry;
1245 }
1246
1247 spin_lock_bh(&ift->lock);
1248 ift->ifpub = ifp;
Lorenzo Colitti76f793e2011-07-26 13:50:49 +00001249 ift->cstamp = now;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250 ift->tstamp = tmp_tstamp;
1251 spin_unlock_bh(&ift->lock);
1252
David S. Millercf22f9a2012-04-14 21:37:40 -04001253 addrconf_dad_start(ift);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254 in6_ifa_put(ift);
1255 in6_dev_put(idev);
1256out:
1257 return ret;
1258}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259
1260/*
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001261 * Choose an appropriate source address (RFC3484)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262 */
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001263enum {
1264 IPV6_SADDR_RULE_INIT = 0,
1265 IPV6_SADDR_RULE_LOCAL,
1266 IPV6_SADDR_RULE_SCOPE,
1267 IPV6_SADDR_RULE_PREFERRED,
1268#ifdef CONFIG_IPV6_MIP6
1269 IPV6_SADDR_RULE_HOA,
1270#endif
1271 IPV6_SADDR_RULE_OIF,
1272 IPV6_SADDR_RULE_LABEL,
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001273 IPV6_SADDR_RULE_PRIVACY,
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001274 IPV6_SADDR_RULE_ORCHID,
1275 IPV6_SADDR_RULE_PREFIX,
Erik Kline7fd25612014-10-28 18:11:14 +09001276#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1277 IPV6_SADDR_RULE_NOT_OPTIMISTIC,
1278#endif
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001279 IPV6_SADDR_RULE_MAX
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001280};
1281
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001282struct ipv6_saddr_score {
1283 int rule;
1284 int addr_type;
1285 struct inet6_ifaddr *ifa;
1286 DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX);
1287 int scopedist;
1288 int matchlen;
1289};
1290
1291struct ipv6_saddr_dst {
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +09001292 const struct in6_addr *addr;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001293 int ifindex;
1294 int scope;
1295 int label;
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001296 unsigned int prefs;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001297};
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001298
Dave Jonesb6f99a22007-03-22 12:27:49 -07001299static inline int ipv6_saddr_preferred(int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300{
Ulrich Weber45bb0062010-02-25 23:28:58 +00001301 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK))
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001302 return 1;
1303 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001304}
1305
Erik Kline7fd25612014-10-28 18:11:14 +09001306static inline bool ipv6_use_optimistic_addr(struct inet6_dev *idev)
1307{
1308#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1309 return idev && idev->cnf.optimistic_dad && idev->cnf.use_optimistic;
1310#else
1311 return false;
1312#endif
1313}
1314
Benjamin Thery3de23252008-05-28 14:51:24 +02001315static int ipv6_get_saddr_eval(struct net *net,
1316 struct ipv6_saddr_score *score,
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001317 struct ipv6_saddr_dst *dst,
1318 int i)
1319{
1320 int ret;
1321
1322 if (i <= score->rule) {
1323 switch (i) {
1324 case IPV6_SADDR_RULE_SCOPE:
1325 ret = score->scopedist;
1326 break;
1327 case IPV6_SADDR_RULE_PREFIX:
1328 ret = score->matchlen;
1329 break;
1330 default:
1331 ret = !!test_bit(i, score->scorebits);
1332 }
1333 goto out;
1334 }
1335
1336 switch (i) {
1337 case IPV6_SADDR_RULE_INIT:
1338 /* Rule 0: remember if hiscore is not ready yet */
1339 ret = !!score->ifa;
1340 break;
1341 case IPV6_SADDR_RULE_LOCAL:
1342 /* Rule 1: Prefer same address */
1343 ret = ipv6_addr_equal(&score->ifa->addr, dst->addr);
1344 break;
1345 case IPV6_SADDR_RULE_SCOPE:
1346 /* Rule 2: Prefer appropriate scope
1347 *
1348 * ret
1349 * ^
1350 * -1 | d 15
1351 * ---+--+-+---> scope
1352 * |
1353 * | d is scope of the destination.
1354 * B-d | \
1355 * | \ <- smaller scope is better if
stephen hemmingerdb9c7c32014-01-12 11:26:32 -08001356 * B-15 | \ if scope is enough for destination.
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001357 * | ret = B - scope (-1 <= scope >= d <= 15).
1358 * d-C-1 | /
1359 * |/ <- greater is better
1360 * -C / if scope is not enough for destination.
1361 * /| ret = scope - C (-1 <= d < scope <= 15).
1362 *
1363 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1364 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1365 * Assume B = 0 and we get C > 29.
1366 */
1367 ret = __ipv6_addr_src_scope(score->addr_type);
1368 if (ret >= dst->scope)
1369 ret = -ret;
1370 else
1371 ret -= 128; /* 30 is enough */
1372 score->scopedist = ret;
1373 break;
1374 case IPV6_SADDR_RULE_PREFERRED:
Erik Kline7fd25612014-10-28 18:11:14 +09001375 {
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001376 /* Rule 3: Avoid deprecated and optimistic addresses */
Erik Kline7fd25612014-10-28 18:11:14 +09001377 u8 avoid = IFA_F_DEPRECATED;
1378
1379 if (!ipv6_use_optimistic_addr(score->ifa->idev))
1380 avoid |= IFA_F_OPTIMISTIC;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001381 ret = ipv6_saddr_preferred(score->addr_type) ||
Erik Kline7fd25612014-10-28 18:11:14 +09001382 !(score->ifa->flags & avoid);
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001383 break;
Erik Kline7fd25612014-10-28 18:11:14 +09001384 }
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001385#ifdef CONFIG_IPV6_MIP6
1386 case IPV6_SADDR_RULE_HOA:
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001387 {
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001388 /* Rule 4: Prefer home address */
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001389 int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA);
1390 ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001391 break;
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001392 }
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001393#endif
1394 case IPV6_SADDR_RULE_OIF:
1395 /* Rule 5: Prefer outgoing interface */
1396 ret = (!dst->ifindex ||
1397 dst->ifindex == score->ifa->idev->dev->ifindex);
1398 break;
1399 case IPV6_SADDR_RULE_LABEL:
1400 /* Rule 6: Prefer matching label */
Benjamin Thery3de23252008-05-28 14:51:24 +02001401 ret = ipv6_addr_label(net,
1402 &score->ifa->addr, score->addr_type,
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001403 score->ifa->idev->dev->ifindex) == dst->label;
1404 break;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001405 case IPV6_SADDR_RULE_PRIVACY:
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001406 {
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001407 /* Rule 7: Prefer public address
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001408 * Note: prefer temporary address if use_tempaddr >= 2
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001409 */
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001410 int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ?
1411 !!(dst->prefs & IPV6_PREFER_SRC_TMP) :
1412 score->ifa->idev->cnf.use_tempaddr >= 2;
1413 ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001414 break;
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001415 }
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001416 case IPV6_SADDR_RULE_ORCHID:
1417 /* Rule 8-: Prefer ORCHID vs ORCHID or
1418 * non-ORCHID vs non-ORCHID
1419 */
1420 ret = !(ipv6_addr_orchid(&score->ifa->addr) ^
1421 ipv6_addr_orchid(dst->addr));
1422 break;
1423 case IPV6_SADDR_RULE_PREFIX:
1424 /* Rule 8: Use longest matching prefix */
YOSHIFUJI Hideaki / 吉藤英明91b4b042012-09-10 18:41:07 +00001425 ret = ipv6_addr_diff(&score->ifa->addr, dst->addr);
1426 if (ret > score->ifa->prefix_len)
1427 ret = score->ifa->prefix_len;
1428 score->matchlen = ret;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001429 break;
Erik Kline7fd25612014-10-28 18:11:14 +09001430#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1431 case IPV6_SADDR_RULE_NOT_OPTIMISTIC:
1432 /* Optimistic addresses still have lower precedence than other
1433 * preferred addresses.
1434 */
1435 ret = !(score->ifa->flags & IFA_F_OPTIMISTIC);
1436 break;
1437#endif
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001438 default:
1439 ret = 0;
1440 }
1441
1442 if (ret)
1443 __set_bit(i, score->scorebits);
1444 score->rule = i;
1445out:
1446 return ret;
1447}
1448
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001449static int __ipv6_dev_get_saddr(struct net *net,
1450 struct ipv6_saddr_dst *dst,
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001451 struct inet6_dev *idev,
1452 struct ipv6_saddr_score *scores,
1453 int hiscore_idx)
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001454{
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001455 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 +09001456
1457 read_lock_bh(&idev->lock);
1458 list_for_each_entry(score->ifa, &idev->addr_list, if_list) {
1459 int i;
1460
1461 /*
1462 * - Tentative Address (RFC2462 section 5.4)
1463 * - A tentative address is not considered
1464 * "assigned to an interface" in the traditional
1465 * sense, unless it is also flagged as optimistic.
1466 * - Candidate Source Address (section 4)
1467 * - In any case, anycast addresses, multicast
1468 * addresses, and the unspecified address MUST
1469 * NOT be included in a candidate set.
1470 */
1471 if ((score->ifa->flags & IFA_F_TENTATIVE) &&
1472 (!(score->ifa->flags & IFA_F_OPTIMISTIC)))
1473 continue;
1474
1475 score->addr_type = __ipv6_addr_type(&score->ifa->addr);
1476
1477 if (unlikely(score->addr_type == IPV6_ADDR_ANY ||
1478 score->addr_type & IPV6_ADDR_MULTICAST)) {
1479 net_dbg_ratelimited("ADDRCONF: unspecified / multicast address assigned as unicast address on %s",
1480 idev->dev->name);
1481 continue;
1482 }
1483
1484 score->rule = -1;
1485 bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX);
1486
1487 for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) {
1488 int minihiscore, miniscore;
1489
1490 minihiscore = ipv6_get_saddr_eval(net, hiscore, dst, i);
1491 miniscore = ipv6_get_saddr_eval(net, score, dst, i);
1492
1493 if (minihiscore > miniscore) {
1494 if (i == IPV6_SADDR_RULE_SCOPE &&
1495 score->scopedist > 0) {
1496 /*
1497 * special case:
1498 * each remaining entry
1499 * has too small (not enough)
1500 * scope, because ifa entries
1501 * are sorted by their scope
1502 * values.
1503 */
1504 goto out;
1505 }
1506 break;
1507 } else if (minihiscore < miniscore) {
1508 if (hiscore->ifa)
1509 in6_ifa_put(hiscore->ifa);
1510
1511 in6_ifa_hold(score->ifa);
1512
1513 swap(hiscore, score);
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001514 hiscore_idx = 1 - hiscore_idx;
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001515
1516 /* restore our iterator */
1517 score->ifa = hiscore->ifa;
1518
1519 break;
1520 }
1521 }
1522 }
1523out:
1524 read_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001525 return hiscore_idx;
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001526}
1527
Patrick McHardyb3f644f2012-08-26 19:14:14 +02001528int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +09001529 const struct in6_addr *daddr, unsigned int prefs,
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001530 struct in6_addr *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001531{
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001532 struct ipv6_saddr_score scores[2], *hiscore;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001533 struct ipv6_saddr_dst dst;
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001534 struct inet6_dev *idev;
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001535 struct net_device *dev;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001536 int dst_type;
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001537 bool use_oif_addr = false;
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001538 int hiscore_idx = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001539
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001540 dst_type = __ipv6_addr_type(daddr);
1541 dst.addr = daddr;
1542 dst.ifindex = dst_dev ? dst_dev->ifindex : 0;
1543 dst.scope = __ipv6_addr_src_scope(dst_type);
Benjamin Thery3de23252008-05-28 14:51:24 +02001544 dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex);
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +09001545 dst.prefs = prefs;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001546
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001547 scores[hiscore_idx].rule = -1;
1548 scores[hiscore_idx].ifa = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001549
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001550 rcu_read_lock();
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001551
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001552 /* Candidate Source Address (section 4)
1553 * - multicast and link-local destination address,
1554 * the set of candidate source address MUST only
1555 * include addresses assigned to interfaces
1556 * belonging to the same link as the outgoing
1557 * interface.
1558 * (- For site-local destination addresses, the
1559 * set of candidate source addresses MUST only
1560 * include addresses assigned to interfaces
1561 * belonging to the same site as the outgoing
1562 * interface.)
Erik Kline3985e8a2015-07-22 16:38:25 +09001563 * - "It is RECOMMENDED that the candidate source addresses
1564 * be the set of unicast addresses assigned to the
1565 * interface that will be used to send to the destination
1566 * (the 'outgoing' interface)." (RFC 6724)
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001567 */
1568 if (dst_dev) {
Erik Kline3985e8a2015-07-22 16:38:25 +09001569 idev = __in6_dev_get(dst_dev);
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001570 if ((dst_type & IPV6_ADDR_MULTICAST) ||
Erik Kline3985e8a2015-07-22 16:38:25 +09001571 dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL ||
1572 (idev && idev->cnf.use_oif_addrs_only)) {
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001573 use_oif_addr = true;
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001574 }
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001575 }
1576
1577 if (use_oif_addr) {
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001578 if (idev)
YOSHIFUJI Hideakic15df302015-07-16 16:51:30 +09001579 hiscore_idx = __ipv6_dev_get_saddr(net, &dst, idev, scores, hiscore_idx);
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001580 } else {
1581 for_each_netdev_rcu(net, dev) {
1582 idev = __in6_dev_get(dev);
1583 if (!idev)
1584 continue;
YOSHIFUJI Hideakic15df302015-07-16 16:51:30 +09001585 hiscore_idx = __ipv6_dev_get_saddr(net, &dst, idev, scores, hiscore_idx);
YOSHIFUJI Hideaki/吉藤英明9131f3d2015-07-10 16:58:31 +09001586 }
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001587 }
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001588 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001589
YOSHIFUJI Hideaki/吉藤英明c0b8da12015-07-13 23:28:10 +09001590 hiscore = &scores[hiscore_idx];
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001591 if (!hiscore->ifa)
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001592 return -EADDRNOTAVAIL;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001593
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +00001594 *saddr = hiscore->ifa->addr;
YOSHIFUJI Hideakia9b05722008-03-02 10:48:21 +09001595 in6_ifa_put(hiscore->ifa);
YOSHIFUJI Hideaki072047e2005-11-08 09:38:30 -08001596 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001597}
YOSHIFUJI Hideaki5e5f3f02008-03-03 21:44:34 +09001598EXPORT_SYMBOL(ipv6_dev_get_saddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001599
Amerigo Wang89657792013-06-29 21:30:49 +08001600int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr,
Jiri Pirko479840f2013-12-06 09:45:21 +01001601 u32 banned_flags)
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02001602{
1603 struct inet6_ifaddr *ifp;
1604 int err = -EADDRNOTAVAIL;
1605
Hannes Frederic Sowa602582c2014-01-19 21:58:19 +01001606 list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) {
1607 if (ifp->scope > IFA_LINK)
1608 break;
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02001609 if (ifp->scope == IFA_LINK &&
1610 !(ifp->flags & banned_flags)) {
1611 *addr = ifp->addr;
1612 err = 0;
1613 break;
1614 }
1615 }
1616 return err;
1617}
1618
Neil Horman95c385b2007-04-25 17:08:10 -07001619int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
Jiri Pirko479840f2013-12-06 09:45:21 +01001620 u32 banned_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621{
1622 struct inet6_dev *idev;
1623 int err = -EADDRNOTAVAIL;
1624
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001625 rcu_read_lock();
Stephen Hemmingere21e8462010-03-20 16:09:01 -07001626 idev = __in6_dev_get(dev);
1627 if (idev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001628 read_lock_bh(&idev->lock);
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02001629 err = __ipv6_get_lladdr(idev, addr, banned_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001630 read_unlock_bh(&idev->lock);
1631 }
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07001632 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001633 return err;
1634}
1635
1636static int ipv6_count_addresses(struct inet6_dev *idev)
1637{
1638 int cnt = 0;
1639 struct inet6_ifaddr *ifp;
1640
1641 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00001642 list_for_each_entry(ifp, &idev->addr_list, if_list)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001643 cnt++;
1644 read_unlock_bh(&idev->lock);
1645 return cnt;
1646}
1647
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001648int ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
Florian Westphal2a7851b2013-05-17 03:56:10 +00001649 const struct net_device *dev, int strict)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001650{
Erik Klinec58da4c2015-02-04 20:01:23 +09001651 return ipv6_chk_addr_and_flags(net, addr, dev, strict, IFA_F_TENTATIVE);
1652}
1653EXPORT_SYMBOL(ipv6_chk_addr);
1654
1655int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
1656 const struct net_device *dev, int strict,
1657 u32 banned_flags)
1658{
Stephen Hemmingereedf0422010-05-17 22:27:12 -07001659 struct inet6_ifaddr *ifp;
Eric Dumazetddbe5032012-07-18 08:11:12 +00001660 unsigned int hash = inet6_addr_hash(addr);
Erik Klinec58da4c2015-02-04 20:01:23 +09001661 u32 ifp_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001662
stephen hemminger5c578ae2010-03-17 20:31:11 +00001663 rcu_read_lock_bh();
Sasha Levinb67bfe02013-02-27 17:06:00 -08001664 hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09001665 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcanobfeade02008-01-10 22:43:18 -08001666 continue;
Erik Klinec58da4c2015-02-04 20:01:23 +09001667 /* Decouple optimistic from tentative for evaluation here.
1668 * Ban optimistic addresses explicitly, when required.
1669 */
1670 ifp_flags = (ifp->flags&IFA_F_OPTIMISTIC)
1671 ? (ifp->flags&~IFA_F_TENTATIVE)
1672 : ifp->flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001673 if (ipv6_addr_equal(&ifp->addr, addr) &&
Erik Klinec58da4c2015-02-04 20:01:23 +09001674 !(ifp_flags&banned_flags) &&
Ian Morris63159f22015-03-29 14:00:04 +01001675 (!dev || ifp->idev->dev == dev ||
Stephen Hemmingereedf0422010-05-17 22:27:12 -07001676 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) {
1677 rcu_read_unlock_bh();
1678 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001679 }
1680 }
stephen hemminger5c578ae2010-03-17 20:31:11 +00001681
Stephen Hemmingereedf0422010-05-17 22:27:12 -07001682 rcu_read_unlock_bh();
1683 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001684}
Erik Klinec58da4c2015-02-04 20:01:23 +09001685EXPORT_SYMBOL(ipv6_chk_addr_and_flags);
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +09001686
David S. Miller3e81c6d2010-03-20 16:18:00 -07001687static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
1688 struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001689{
Eric Dumazetddbe5032012-07-18 08:11:12 +00001690 unsigned int hash = inet6_addr_hash(addr);
stephen hemmingerc2e21292010-03-17 20:31:10 +00001691 struct inet6_ifaddr *ifp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001692
Sasha Levinb67bfe02013-02-27 17:06:00 -08001693 hlist_for_each_entry(ifp, &inet6_addr_lst[hash], addr_lst) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09001694 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcano06bfe652008-01-10 22:43:42 -08001695 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001696 if (ipv6_addr_equal(&ifp->addr, addr)) {
Ian Morris63159f22015-03-29 14:00:04 +01001697 if (!dev || ifp->idev->dev == dev)
David S. Miller3e81c6d2010-03-20 16:18:00 -07001698 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001699 }
1700 }
David S. Miller3e81c6d2010-03-20 16:18:00 -07001701 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001702}
1703
Catalin\(ux\) M. BOIE7df37ff2013-09-23 23:04:19 +03001704/* Compares an address/prefix_len with addresses on device @dev.
1705 * If one is found it returns true.
1706 */
1707bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
1708 const unsigned int prefix_len, struct net_device *dev)
1709{
1710 struct inet6_dev *idev;
1711 struct inet6_ifaddr *ifa;
1712 bool ret = false;
1713
1714 rcu_read_lock();
1715 idev = __in6_dev_get(dev);
1716 if (idev) {
1717 read_lock_bh(&idev->lock);
1718 list_for_each_entry(ifa, &idev->addr_list, if_list) {
1719 ret = ipv6_prefix_equal(addr, &ifa->addr, prefix_len);
1720 if (ret)
1721 break;
1722 }
1723 read_unlock_bh(&idev->lock);
1724 }
1725 rcu_read_unlock();
1726
1727 return ret;
1728}
1729EXPORT_SYMBOL(ipv6_chk_custom_prefix);
1730
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001731int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev)
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -04001732{
1733 struct inet6_dev *idev;
1734 struct inet6_ifaddr *ifa;
1735 int onlink;
1736
1737 onlink = 0;
1738 rcu_read_lock();
1739 idev = __in6_dev_get(dev);
1740 if (idev) {
1741 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00001742 list_for_each_entry(ifa, &idev->addr_list, if_list) {
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -04001743 onlink = ipv6_prefix_equal(addr, &ifa->addr,
1744 ifa->prefix_len);
1745 if (onlink)
1746 break;
1747 }
1748 read_unlock_bh(&idev->lock);
1749 }
1750 rcu_read_unlock();
1751 return onlink;
1752}
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -04001753EXPORT_SYMBOL(ipv6_chk_prefix);
1754
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +09001755struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr,
Daniel Lezcano1cab3da2008-01-10 22:44:09 -08001756 struct net_device *dev, int strict)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001757{
David S. Millerb79d1d52010-03-25 21:39:21 -07001758 struct inet6_ifaddr *ifp, *result = NULL;
Eric Dumazetddbe5032012-07-18 08:11:12 +00001759 unsigned int hash = inet6_addr_hash(addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001760
stephen hemminger5c578ae2010-03-17 20:31:11 +00001761 rcu_read_lock_bh();
Sasha Levinb67bfe02013-02-27 17:06:00 -08001762 hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09001763 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcano1cab3da2008-01-10 22:44:09 -08001764 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001765 if (ipv6_addr_equal(&ifp->addr, addr)) {
Ian Morris63159f22015-03-29 14:00:04 +01001766 if (!dev || ifp->idev->dev == dev ||
Linus Torvalds1da177e2005-04-16 15:20:36 -07001767 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
David S. Millerb79d1d52010-03-25 21:39:21 -07001768 result = ifp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769 in6_ifa_hold(ifp);
1770 break;
1771 }
1772 }
1773 }
stephen hemminger5c578ae2010-03-17 20:31:11 +00001774 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775
David S. Millerb79d1d52010-03-25 21:39:21 -07001776 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001777}
1778
Linus Torvalds1da177e2005-04-16 15:20:36 -07001779/* Gets referenced address, destroys ifaddr */
1780
Brian Haleycc411d02009-09-09 14:41:32 +00001781static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001782{
Lubomir Rintel3d171f32016-01-08 13:47:23 +01001783 if (dad_failed)
1784 ifp->flags |= IFA_F_DADFAILED;
1785
Linus Torvalds1da177e2005-04-16 15:20:36 -07001786 if (ifp->flags&IFA_F_PERMANENT) {
1787 spin_lock_bh(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01001788 addrconf_del_dad_work(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001789 ifp->flags |= IFA_F_TENTATIVE;
1790 spin_unlock_bh(&ifp->lock);
Herbert Xue2577a02010-03-13 12:23:29 -08001791 if (dad_failed)
1792 ipv6_ifa_notify(0, ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001793 in6_ifa_put(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001794 } else if (ifp->flags&IFA_F_TEMPORARY) {
1795 struct inet6_ifaddr *ifpub;
1796 spin_lock_bh(&ifp->lock);
1797 ifpub = ifp->ifpub;
1798 if (ifpub) {
1799 in6_ifa_hold(ifpub);
1800 spin_unlock_bh(&ifp->lock);
1801 ipv6_create_tempaddr(ifpub, ifp);
1802 in6_ifa_put(ifpub);
1803 } else {
1804 spin_unlock_bh(&ifp->lock);
1805 }
1806 ipv6_del_addr(ifp);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01001807 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001808 ipv6_del_addr(ifp);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01001809 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001810}
1811
Herbert Xuf2344a12010-05-18 15:55:27 -07001812static int addrconf_dad_end(struct inet6_ifaddr *ifp)
1813{
1814 int err = -ENOENT;
1815
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01001816 spin_lock_bh(&ifp->lock);
Herbert Xuf2344a12010-05-18 15:55:27 -07001817 if (ifp->state == INET6_IFADDR_STATE_DAD) {
1818 ifp->state = INET6_IFADDR_STATE_POSTDAD;
1819 err = 0;
1820 }
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01001821 spin_unlock_bh(&ifp->lock);
Herbert Xuf2344a12010-05-18 15:55:27 -07001822
1823 return err;
1824}
1825
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09001826void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1827{
Hannes Frederic Sowa5f40ef72015-03-23 23:36:04 +01001828 struct in6_addr addr;
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09001829 struct inet6_dev *idev = ifp->idev;
Hannes Frederic Sowa1855b7c2015-03-23 23:36:05 +01001830 struct net *net = dev_net(ifp->idev->dev);
Brian Haley9bdd8d42009-03-18 18:22:48 -07001831
Ursula Braun853dc2e2010-10-24 23:06:43 +00001832 if (addrconf_dad_end(ifp)) {
1833 in6_ifa_put(ifp);
Herbert Xuf2344a12010-05-18 15:55:27 -07001834 return;
Ursula Braun853dc2e2010-10-24 23:06:43 +00001835 }
Herbert Xuf2344a12010-05-18 15:55:27 -07001836
Joe Perchese87cc472012-05-13 21:56:26 +00001837 net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n",
1838 ifp->idev->dev->name, &ifp->addr);
Brian Haley9bdd8d42009-03-18 18:22:48 -07001839
Hannes Frederic Sowa5f40ef72015-03-23 23:36:04 +01001840 spin_lock_bh(&ifp->lock);
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09001841
Hannes Frederic Sowa5f40ef72015-03-23 23:36:04 +01001842 if (ifp->flags & IFA_F_STABLE_PRIVACY) {
1843 int scope = ifp->scope;
1844 u32 flags = ifp->flags;
1845 struct in6_addr new_addr;
1846 struct inet6_ifaddr *ifp2;
1847 u32 valid_lft, preferred_lft;
1848 int pfxlen = ifp->prefix_len;
Hannes Frederic Sowa5f40ef72015-03-23 23:36:04 +01001849 int retries = ifp->stable_privacy_retry + 1;
1850
Hannes Frederic Sowa1855b7c2015-03-23 23:36:05 +01001851 if (retries > net->ipv6.sysctl.idgen_retries) {
Hannes Frederic Sowa5f40ef72015-03-23 23:36:04 +01001852 net_info_ratelimited("%s: privacy stable address generation failed because of DAD conflicts!\n",
1853 ifp->idev->dev->name);
1854 goto errdad;
1855 }
1856
1857 new_addr = ifp->addr;
1858 if (ipv6_generate_stable_address(&new_addr, retries,
1859 idev))
1860 goto errdad;
1861
1862 valid_lft = ifp->valid_lft;
1863 preferred_lft = ifp->prefered_lft;
1864
1865 spin_unlock_bh(&ifp->lock);
1866
1867 if (idev->cnf.max_addresses &&
1868 ipv6_count_addresses(idev) >=
1869 idev->cnf.max_addresses)
1870 goto lock_errdad;
1871
1872 net_info_ratelimited("%s: generating new stable privacy address because of DAD conflict\n",
1873 ifp->idev->dev->name);
1874
1875 ifp2 = ipv6_add_addr(idev, &new_addr, NULL, pfxlen,
1876 scope, flags, valid_lft,
1877 preferred_lft);
1878 if (IS_ERR(ifp2))
1879 goto lock_errdad;
1880
1881 spin_lock_bh(&ifp2->lock);
1882 ifp2->stable_privacy_retry = retries;
1883 ifp2->state = INET6_IFADDR_STATE_PREDAD;
1884 spin_unlock_bh(&ifp2->lock);
1885
Hannes Frederic Sowa1855b7c2015-03-23 23:36:05 +01001886 addrconf_mod_dad_work(ifp2, net->ipv6.sysctl.idgen_delay);
Hannes Frederic Sowa5f40ef72015-03-23 23:36:04 +01001887 in6_ifa_put(ifp2);
1888lock_errdad:
1889 spin_lock_bh(&ifp->lock);
1890 } else if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) {
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09001891 addr.s6_addr32[0] = htonl(0xfe800000);
1892 addr.s6_addr32[1] = 0;
1893
1894 if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) &&
1895 ipv6_addr_equal(&ifp->addr, &addr)) {
1896 /* DAD failed for link-local based on MAC address */
1897 idev->cnf.disable_ipv6 = 1;
Brian Haley9bdd8d42009-03-18 18:22:48 -07001898
Joe Perchesf3213832012-05-15 14:11:53 +00001899 pr_info("%s: IPv6 being disabled!\n",
Brian Haley9bdd8d42009-03-18 18:22:48 -07001900 ifp->idev->dev->name);
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09001901 }
1902 }
1903
Hannes Frederic Sowa5f40ef72015-03-23 23:36:04 +01001904errdad:
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01001905 /* transition from _POSTDAD to _ERRDAD */
1906 ifp->state = INET6_IFADDR_STATE_ERRDAD;
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01001907 spin_unlock_bh(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01001908
1909 addrconf_mod_dad_work(ifp, 0);
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09001910}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001911
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +02001912/* Join to solicited addr multicast group.
1913 * caller must hold RTNL */
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001914void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001915{
1916 struct in6_addr maddr;
1917
1918 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1919 return;
1920
1921 addrconf_addr_solict_mult(addr, &maddr);
1922 ipv6_dev_mc_inc(dev, &maddr);
1923}
1924
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +02001925/* caller must hold RTNL */
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001926void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001927{
1928 struct in6_addr maddr;
1929
1930 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1931 return;
1932
1933 addrconf_addr_solict_mult(addr, &maddr);
1934 __ipv6_dev_mc_dec(idev, &maddr);
1935}
1936
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +02001937/* caller must hold RTNL */
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03001938static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001939{
1940 struct in6_addr addr;
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01001941
Hannes Frederic Sowa88ad3142014-01-06 17:53:14 +01001942 if (ifp->prefix_len >= 127) /* RFC 6164 */
Bjørn Mork2bda8a02011-07-05 23:04:13 +00001943 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001944 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1945 if (ipv6_addr_any(&addr))
1946 return;
WANG Cong013b4d92014-09-11 15:35:11 -07001947 __ipv6_dev_ac_inc(ifp->idev, &addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001948}
1949
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +02001950/* caller must hold RTNL */
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03001951static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001952{
1953 struct in6_addr addr;
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01001954
Hannes Frederic Sowa88ad3142014-01-06 17:53:14 +01001955 if (ifp->prefix_len >= 127) /* RFC 6164 */
YOSHIFUJI Hideaki32019e62011-07-24 11:44:34 +00001956 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001957 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1958 if (ipv6_addr_any(&addr))
1959 return;
1960 __ipv6_dev_ac_dec(ifp->idev, &addr);
1961}
1962
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +00001963static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev)
1964{
Alexander Aring5241c2d2015-12-14 20:55:22 +01001965 if (dev->addr_len != EUI64_ADDR_LEN)
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +00001966 return -1;
Alexander Aring5241c2d2015-12-14 20:55:22 +01001967 memcpy(eui, dev->dev_addr, EUI64_ADDR_LEN);
YOSHIFUJI Hideaki / 吉藤英明5e98a362013-01-28 10:44:29 +00001968 eui[0] ^= 2;
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +00001969 return 0;
1970}
1971
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001972static int addrconf_ifid_ieee1394(u8 *eui, struct net_device *dev)
1973{
1974 union fwnet_hwaddr *ha;
1975
1976 if (dev->addr_len != FWNET_ALEN)
1977 return -1;
1978
1979 ha = (union fwnet_hwaddr *)dev->dev_addr;
1980
1981 memcpy(eui, &ha->uc.uniq_id, sizeof(ha->uc.uniq_id));
1982 eui[0] ^= 2;
1983 return 0;
1984}
1985
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001986static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1987{
1988 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1989 if (dev->addr_len != ARCNET_ALEN)
1990 return -1;
1991 memset(eui, 0, 7);
Eldad Zack8e5e8f32012-04-01 07:49:08 +00001992 eui[7] = *(u8 *)dev->dev_addr;
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08001993 return 0;
1994}
1995
1996static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1997{
1998 if (dev->addr_len != INFINIBAND_ALEN)
1999 return -1;
2000 memcpy(eui, dev->dev_addr + 12, 8);
2001 eui[0] |= 2;
2002 return 0;
2003}
2004
stephen hemmingerc61393e2010-10-04 20:17:53 +00002005static int __ipv6_isatap_ifid(u8 *eui, __be32 addr)
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09002006{
Sascha Hlusiak9af28512009-05-19 12:56:51 +00002007 if (addr == 0)
2008 return -1;
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09002009 eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
2010 ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
2011 ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
2012 ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
2013 ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
2014 ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
2015 eui[1] = 0;
2016 eui[2] = 0x5E;
2017 eui[3] = 0xFE;
2018 memcpy(eui + 4, &addr, 4);
2019 return 0;
2020}
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09002021
2022static int addrconf_ifid_sit(u8 *eui, struct net_device *dev)
2023{
2024 if (dev->priv_flags & IFF_ISATAP)
2025 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
2026 return -1;
2027}
2028
stephen hemmingeraee80b52011-06-08 10:44:30 +00002029static int addrconf_ifid_gre(u8 *eui, struct net_device *dev)
2030{
2031 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
2032}
2033
Nicolas Dichtele8377352013-08-20 12:16:06 +02002034static int addrconf_ifid_ip6tnl(u8 *eui, struct net_device *dev)
2035{
2036 memcpy(eui, dev->perm_addr, 3);
2037 memcpy(eui + 5, dev->perm_addr + 3, 3);
2038 eui[3] = 0xFF;
2039 eui[4] = 0xFE;
2040 eui[0] ^= 2;
2041 return 0;
2042}
2043
Linus Torvalds1da177e2005-04-16 15:20:36 -07002044static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
2045{
2046 switch (dev->type) {
2047 case ARPHRD_ETHER:
2048 case ARPHRD_FDDI:
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08002049 return addrconf_ifid_eui48(eui, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002050 case ARPHRD_ARCNET:
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08002051 return addrconf_ifid_arcnet(eui, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002052 case ARPHRD_INFINIBAND:
YOSHIFUJI Hideaki073a8e02006-03-20 16:54:49 -08002053 return addrconf_ifid_infiniband(eui, dev);
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11002054 case ARPHRD_SIT:
YOSHIFUJI Hideakidfd982b2008-04-10 15:42:09 +09002055 return addrconf_ifid_sit(eui, dev);
stephen hemmingeraee80b52011-06-08 10:44:30 +00002056 case ARPHRD_IPGRE:
2057 return addrconf_ifid_gre(eui, dev);
Jukka Rissanene74bccb2013-12-11 17:05:36 +02002058 case ARPHRD_6LOWPAN:
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +00002059 return addrconf_ifid_eui64(eui, dev);
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00002060 case ARPHRD_IEEE1394:
2061 return addrconf_ifid_ieee1394(eui, dev);
Nicolas Dichtele8377352013-08-20 12:16:06 +02002062 case ARPHRD_TUNNEL6:
2063 return addrconf_ifid_ip6tnl(eui, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002064 }
2065 return -1;
2066}
2067
2068static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
2069{
2070 int err = -1;
2071 struct inet6_ifaddr *ifp;
2072
2073 read_lock_bh(&idev->lock);
Hannes Frederic Sowa602582c2014-01-19 21:58:19 +01002074 list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) {
2075 if (ifp->scope > IFA_LINK)
2076 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002077 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
2078 memcpy(eui, ifp->addr.s6_addr+8, 8);
2079 err = 0;
2080 break;
2081 }
2082 }
2083 read_unlock_bh(&idev->lock);
2084 return err;
2085}
2086
Linus Torvalds1da177e2005-04-16 15:20:36 -07002087/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00002088static void __ipv6_regen_rndid(struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002089{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002090regen:
YOSHIFUJI Hideaki955189e2006-03-20 16:54:09 -08002091 get_random_bytes(idev->rndid, sizeof(idev->rndid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002092 idev->rndid[0] &= ~0x02;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002093
2094 /*
2095 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
2096 * check if generated address is not inappropriate
2097 *
2098 * - Reserved subnet anycast (RFC 2526)
2099 * 11111101 11....11 1xxxxxxx
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11002100 * - ISATAP (RFC4214) 6.1
Linus Torvalds1da177e2005-04-16 15:20:36 -07002101 * 00-00-5E-FE-xx-xx-xx-xx
2102 * - value 0
2103 * - XXX: already assigned to an address on the device
2104 */
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002105 if (idev->rndid[0] == 0xfd &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07002106 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
2107 (idev->rndid[7]&0x80))
2108 goto regen;
2109 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
2110 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
2111 goto regen;
2112 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
2113 goto regen;
2114 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002115}
2116
2117static void ipv6_regen_rndid(unsigned long data)
2118{
2119 struct inet6_dev *idev = (struct inet6_dev *) data;
2120 unsigned long expires;
2121
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07002122 rcu_read_lock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002123 write_lock_bh(&idev->lock);
2124
2125 if (idev->dead)
2126 goto out;
2127
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00002128 __ipv6_regen_rndid(idev);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002129
Linus Torvalds1da177e2005-04-16 15:20:36 -07002130 expires = jiffies +
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002131 idev->cnf.temp_prefered_lft * HZ -
Jiri Pirko1f9248e52013-12-07 19:26:53 +01002132 idev->cnf.regen_max_retry * idev->cnf.dad_transmits *
2133 NEIGH_VAR(idev->nd_parms, RETRANS_TIME) -
Ben Hutchings784e2712010-06-26 11:42:55 +00002134 idev->cnf.max_desync_factor * HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002135 if (time_before(expires, jiffies)) {
Joe Perchesf3213832012-05-15 14:11:53 +00002136 pr_warn("%s: too short regeneration interval; timer disabled for %s\n",
2137 __func__, idev->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002138 goto out;
2139 }
2140
2141 if (!mod_timer(&idev->regen_timer, expires))
2142 in6_dev_hold(idev);
2143
2144out:
2145 write_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07002146 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002147 in6_dev_put(idev);
2148}
2149
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00002150static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr)
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002151{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002152 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
Sorin Dumitrueb7e0572012-08-30 02:01:45 +00002153 __ipv6_regen_rndid(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002154}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002155
2156/*
2157 * Add prefix route.
2158 */
2159
2160static void
2161addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
Jamal Hadi Salime431b8c2005-06-18 22:55:31 -07002162 unsigned long expires, u32 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002163{
Thomas Graf86872cb2006-08-22 00:01:08 -07002164 struct fib6_config cfg = {
David Ahernca254492015-10-12 11:47:10 -07002165 .fc_table = l3mdev_fib_table(dev) ? : RT6_TABLE_PREFIX,
Thomas Graf86872cb2006-08-22 00:01:08 -07002166 .fc_metric = IP6_RT_PRIO_ADDRCONF,
2167 .fc_ifindex = dev->ifindex,
2168 .fc_expires = expires,
2169 .fc_dst_len = plen,
2170 .fc_flags = RTF_UP | flags,
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09002171 .fc_nlinfo.nl_net = dev_net(dev),
Stephen Hemmingerf410a1f2008-08-23 05:16:46 -07002172 .fc_protocol = RTPROT_KERNEL,
Thomas Graf86872cb2006-08-22 00:01:08 -07002173 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07002174
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +00002175 cfg.fc_dst = *pfx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002176
2177 /* Prevent useless cloning on PtP SIT.
2178 This thing is done here expecting that the whole
2179 class of non-broadcast devices need not cloning.
2180 */
Amerigo Wang07a93622012-10-29 16:23:10 +00002181#if IS_ENABLED(CONFIG_IPV6_SIT)
Thomas Graf86872cb2006-08-22 00:01:08 -07002182 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
2183 cfg.fc_flags |= RTF_NONEXTHOP;
Joerg Roedel0be669b2006-10-10 14:49:53 -07002184#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002185
Thomas Graf86872cb2006-08-22 00:01:08 -07002186 ip6_route_add(&cfg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002187}
2188
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002189
2190static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx,
2191 int plen,
2192 const struct net_device *dev,
2193 u32 flags, u32 noflags)
2194{
2195 struct fib6_node *fn;
2196 struct rt6_info *rt = NULL;
2197 struct fib6_table *table;
David Ahernca254492015-10-12 11:47:10 -07002198 u32 tb_id = l3mdev_fib_table(dev) ? : RT6_TABLE_PREFIX;
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002199
David Ahernca254492015-10-12 11:47:10 -07002200 table = fib6_get_table(dev_net(dev), tb_id);
Ian Morris63159f22015-03-29 14:00:04 +01002201 if (!table)
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002202 return NULL;
2203
Li RongQing5744dd92012-09-11 21:59:01 +00002204 read_lock_bh(&table->tb6_lock);
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002205 fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0);
2206 if (!fn)
2207 goto out;
Martin KaFai Lau1f56a012015-04-28 13:03:03 -07002208
2209 noflags |= RTF_CACHE;
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002210 for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) {
David S. Millerd1918542011-12-28 20:19:20 -05002211 if (rt->dst.dev->ifindex != dev->ifindex)
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002212 continue;
2213 if ((rt->rt6i_flags & flags) != flags)
2214 continue;
Romain Kuntz85da53b2013-01-09 15:02:26 +01002215 if ((rt->rt6i_flags & noflags) != 0)
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002216 continue;
2217 dst_hold(&rt->dst);
2218 break;
2219 }
2220out:
Li RongQing5744dd92012-09-11 21:59:01 +00002221 read_unlock_bh(&table->tb6_lock);
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002222 return rt;
2223}
2224
2225
Linus Torvalds1da177e2005-04-16 15:20:36 -07002226/* Create "default" multicast route to the interface */
2227
2228static void addrconf_add_mroute(struct net_device *dev)
2229{
Thomas Graf86872cb2006-08-22 00:01:08 -07002230 struct fib6_config cfg = {
David Ahernca254492015-10-12 11:47:10 -07002231 .fc_table = l3mdev_fib_table(dev) ? : RT6_TABLE_LOCAL,
Thomas Graf86872cb2006-08-22 00:01:08 -07002232 .fc_metric = IP6_RT_PRIO_ADDRCONF,
2233 .fc_ifindex = dev->ifindex,
2234 .fc_dst_len = 8,
2235 .fc_flags = RTF_UP,
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09002236 .fc_nlinfo.nl_net = dev_net(dev),
Thomas Graf86872cb2006-08-22 00:01:08 -07002237 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07002238
Thomas Graf86872cb2006-08-22 00:01:08 -07002239 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
2240
2241 ip6_route_add(&cfg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002242}
2243
Linus Torvalds1da177e2005-04-16 15:20:36 -07002244static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
2245{
2246 struct inet6_dev *idev;
2247
2248 ASSERT_RTNL();
2249
Stephen Hemmingere21e8462010-03-20 16:09:01 -07002250 idev = ipv6_find_idev(dev);
2251 if (!idev)
Brian Haley64e724f2010-07-20 10:34:30 +00002252 return ERR_PTR(-ENOBUFS);
2253
2254 if (idev->cnf.disable_ipv6)
2255 return ERR_PTR(-EACCES);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002256
2257 /* Add default multicast route */
Li Wei4af04ab2011-12-06 21:23:45 +00002258 if (!(dev->flags & IFF_LOOPBACK))
2259 addrconf_add_mroute(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002260
Linus Torvalds1da177e2005-04-16 15:20:36 -07002261 return idev;
2262}
2263
Jiri Pirko53bd6742013-12-06 09:45:22 +01002264static void manage_tempaddrs(struct inet6_dev *idev,
2265 struct inet6_ifaddr *ifp,
2266 __u32 valid_lft, __u32 prefered_lft,
2267 bool create, unsigned long now)
2268{
2269 u32 flags;
2270 struct inet6_ifaddr *ift;
2271
2272 read_lock_bh(&idev->lock);
2273 /* update all temporary addresses in the list */
2274 list_for_each_entry(ift, &idev->tempaddr_list, tmp_list) {
2275 int age, max_valid, max_prefered;
2276
2277 if (ifp != ift->ifpub)
2278 continue;
2279
2280 /* RFC 4941 section 3.3:
2281 * If a received option will extend the lifetime of a public
2282 * address, the lifetimes of temporary addresses should
2283 * be extended, subject to the overall constraint that no
2284 * temporary addresses should ever remain "valid" or "preferred"
2285 * for a time longer than (TEMP_VALID_LIFETIME) or
2286 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), respectively.
2287 */
2288 age = (now - ift->cstamp) / HZ;
2289 max_valid = idev->cnf.temp_valid_lft - age;
2290 if (max_valid < 0)
2291 max_valid = 0;
2292
2293 max_prefered = idev->cnf.temp_prefered_lft -
2294 idev->cnf.max_desync_factor - age;
2295 if (max_prefered < 0)
2296 max_prefered = 0;
2297
2298 if (valid_lft > max_valid)
2299 valid_lft = max_valid;
2300
2301 if (prefered_lft > max_prefered)
2302 prefered_lft = max_prefered;
2303
2304 spin_lock(&ift->lock);
2305 flags = ift->flags;
2306 ift->valid_lft = valid_lft;
2307 ift->prefered_lft = prefered_lft;
2308 ift->tstamp = now;
2309 if (prefered_lft > 0)
2310 ift->flags &= ~IFA_F_DEPRECATED;
2311
2312 spin_unlock(&ift->lock);
2313 if (!(flags&IFA_F_TENTATIVE))
2314 ipv6_ifa_notify(0, ift);
2315 }
2316
2317 if ((create || list_empty(&idev->tempaddr_list)) &&
2318 idev->cnf.use_tempaddr > 0) {
2319 /* When a new public address is created as described
2320 * in [ADDRCONF], also create a new temporary address.
2321 * Also create a temporary address if it's enabled but
2322 * no temporary address currently exists.
2323 */
2324 read_unlock_bh(&idev->lock);
2325 ipv6_create_tempaddr(ifp, NULL);
2326 } else {
2327 read_unlock_bh(&idev->lock);
2328 }
2329}
2330
Bjørn Morkcc9da6c2015-12-16 16:44:38 +01002331static bool is_addr_mode_generate_stable(struct inet6_dev *idev)
2332{
2333 return idev->addr_gen_mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY ||
2334 idev->addr_gen_mode == IN6_ADDR_GEN_MODE_RANDOM;
2335}
2336
Neil Hormane6bff992012-01-04 10:49:15 +00002337void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002338{
2339 struct prefix_info *pinfo;
2340 __u32 valid_lft;
2341 __u32 prefered_lft;
2342 int addr_type;
Hannes Frederic Sowa64236f32015-03-23 23:36:02 +01002343 u32 addr_flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002344 struct inet6_dev *in6_dev;
Brian Haley56d417b2009-06-01 03:07:33 -07002345 struct net *net = dev_net(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002346
2347 pinfo = (struct prefix_info *) opt;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002348
Linus Torvalds1da177e2005-04-16 15:20:36 -07002349 if (len < sizeof(struct prefix_info)) {
dingtianhongba3542e2013-08-17 10:27:04 +08002350 ADBG("addrconf: prefix option too short\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002351 return;
2352 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002353
Linus Torvalds1da177e2005-04-16 15:20:36 -07002354 /*
2355 * Validation checks ([ADDRCONF], page 19)
2356 */
2357
2358 addr_type = ipv6_addr_type(&pinfo->prefix);
2359
2360 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
2361 return;
2362
2363 valid_lft = ntohl(pinfo->valid);
2364 prefered_lft = ntohl(pinfo->prefered);
2365
2366 if (prefered_lft > valid_lft) {
Joe Perchese87cc472012-05-13 21:56:26 +00002367 net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002368 return;
2369 }
2370
2371 in6_dev = in6_dev_get(dev);
2372
Ian Morris63159f22015-03-29 14:00:04 +01002373 if (!in6_dev) {
Joe Perchese87cc472012-05-13 21:56:26 +00002374 net_dbg_ratelimited("addrconf: device %s not configured\n",
2375 dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002376 return;
2377 }
2378
2379 /*
2380 * Two things going on here:
2381 * 1) Add routes for on-link prefixes
2382 * 2) Configure prefixes with the auto flag set
2383 */
2384
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002385 if (pinfo->onlink) {
2386 struct rt6_info *rt;
2387 unsigned long rt_expires;
2388
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002389 /* Avoid arithmetic overflow. Really, we could
2390 * save rt_expires in seconds, likely valid_lft,
2391 * but it would require division in fib gc, that it
2392 * not good.
2393 */
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002394 if (HZ > USER_HZ)
2395 rt_expires = addrconf_timeout_fixup(valid_lft, HZ);
2396 else
2397 rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ);
YOSHIFUJI Hideaki3dd4bc62005-12-19 14:02:45 -08002398
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002399 if (addrconf_finite_timeout(rt_expires))
2400 rt_expires *= HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002401
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002402 rt = addrconf_get_prefix_route(&pinfo->prefix,
2403 pinfo->prefix_len,
2404 dev,
2405 RTF_ADDRCONF | RTF_PREFIX_RT,
2406 RTF_GATEWAY | RTF_DEFAULT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002407
Andreas Hofmeister14ef37b2011-10-26 03:24:29 +00002408 if (rt) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002409 /* Autoconf prefix route */
2410 if (valid_lft == 0) {
2411 ip6_del_rt(rt);
2412 rt = NULL;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002413 } else if (addrconf_finite_timeout(rt_expires)) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002414 /* not infinity */
Gao feng1716a962012-04-06 00:13:10 +00002415 rt6_set_expires(rt, jiffies + rt_expires);
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002416 } else {
Gao feng1716a962012-04-06 00:13:10 +00002417 rt6_clean_expires(rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002418 }
2419 } else if (valid_lft) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002420 clock_t expires = 0;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002421 int flags = RTF_ADDRCONF | RTF_PREFIX_RT;
2422 if (addrconf_finite_timeout(rt_expires)) {
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002423 /* not infinity */
2424 flags |= RTF_EXPIRES;
2425 expires = jiffies_to_clock_t(rt_expires);
2426 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002427 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002428 dev, expires, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002429 }
Amerigo Wang94e187c2012-10-29 00:13:19 +00002430 ip6_rt_put(rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002431 }
2432
2433 /* Try to figure out our local address for this prefix */
2434
2435 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002436 struct inet6_ifaddr *ifp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002437 struct in6_addr addr;
2438 int create = 0, update_lft = 0;
Daniel Borkmann617fe292013-04-09 03:47:16 +00002439 bool tokenized = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002440
2441 if (pinfo->prefix_len == 64) {
2442 memcpy(&addr, &pinfo->prefix, 8);
Daniel Borkmannf53adae2013-04-08 04:01:30 +00002443
2444 if (!ipv6_addr_any(&in6_dev->token)) {
2445 read_lock_bh(&in6_dev->lock);
2446 memcpy(addr.s6_addr + 8,
2447 in6_dev->token.s6_addr + 8, 8);
2448 read_unlock_bh(&in6_dev->lock);
Daniel Borkmann617fe292013-04-09 03:47:16 +00002449 tokenized = true;
Bjørn Morkcc9da6c2015-12-16 16:44:38 +01002450 } else if (is_addr_mode_generate_stable(in6_dev) &&
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01002451 !ipv6_generate_stable_address(&addr, 0,
2452 in6_dev)) {
Hannes Frederic Sowa64236f32015-03-23 23:36:02 +01002453 addr_flags |= IFA_F_STABLE_PRIVACY;
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01002454 goto ok;
Daniel Borkmannf53adae2013-04-08 04:01:30 +00002455 } else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
2456 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002457 in6_dev_put(in6_dev);
2458 return;
2459 }
2460 goto ok;
2461 }
Joe Perchese87cc472012-05-13 21:56:26 +00002462 net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n",
2463 pinfo->prefix_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002464 in6_dev_put(in6_dev);
2465 return;
2466
2467ok:
2468
YOSHIFUJI Hideaki53b79972008-07-19 22:35:03 -07002469 ifp = ipv6_get_ifaddr(net, &addr, dev, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002470
Ian Morris63159f22015-03-29 14:00:04 +01002471 if (!ifp && valid_lft) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002472 int max_addresses = in6_dev->cnf.max_addresses;
Neil Horman95c385b2007-04-25 17:08:10 -07002473
2474#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2475 if (in6_dev->cnf.optimistic_dad &&
Neil Hormane6bff992012-01-04 10:49:15 +00002476 !net->ipv6.devconf_all->forwarding && sllao)
Bjørn Mork9a1ec462015-12-04 14:15:08 +01002477 addr_flags |= IFA_F_OPTIMISTIC;
Neil Horman95c385b2007-04-25 17:08:10 -07002478#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002479
2480 /* Do not allow to create too much of autoconfigured
2481 * addresses; this would be too easy way to crash kernel.
2482 */
2483 if (!max_addresses ||
2484 ipv6_count_addresses(in6_dev) < max_addresses)
Jiri Pirko3f8f5292013-08-01 10:41:27 +02002485 ifp = ipv6_add_addr(in6_dev, &addr, NULL,
2486 pinfo->prefix_len,
Neil Horman95c385b2007-04-25 17:08:10 -07002487 addr_type&IPV6_ADDR_SCOPE_MASK,
Jiri Benc8a226b22013-08-01 10:41:28 +02002488 addr_flags, valid_lft,
2489 prefered_lft);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002490
YOSHIFUJI Hideaki / 吉藤英明3f0d2ba2013-01-22 06:32:54 +00002491 if (IS_ERR_OR_NULL(ifp)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002492 in6_dev_put(in6_dev);
2493 return;
2494 }
2495
Jiri Benc8a226b22013-08-01 10:41:28 +02002496 update_lft = 0;
2497 create = 1;
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01002498 spin_lock_bh(&ifp->lock);
2499 ifp->flags |= IFA_F_MANAGETEMPADDR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002500 ifp->cstamp = jiffies;
Daniel Borkmann617fe292013-04-09 03:47:16 +00002501 ifp->tokenized = tokenized;
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01002502 spin_unlock_bh(&ifp->lock);
David S. Millercf22f9a2012-04-14 21:37:40 -04002503 addrconf_dad_start(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002504 }
2505
2506 if (ifp) {
Jiri Pirko479840f2013-12-06 09:45:21 +01002507 u32 flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002508 unsigned long now;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002509 u32 stored_lft;
2510
2511 /* update lifetime (RFC2462 5.5.3 e) */
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01002512 spin_lock_bh(&ifp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002513 now = jiffies;
2514 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
2515 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
2516 else
2517 stored_lft = 0;
Jiri Benc8a226b22013-08-01 10:41:28 +02002518 if (!update_lft && !create && stored_lft) {
Fabian Frederick9451a302014-10-27 19:11:56 +01002519 const u32 minimum_lft = min_t(u32,
2520 stored_lft, MIN_VALID_LIFETIME);
Paul Marksc9d55d52013-09-25 15:12:55 -07002521 valid_lft = max(valid_lft, minimum_lft);
2522
2523 /* RFC4862 Section 5.5.3e:
2524 * "Note that the preferred lifetime of the
2525 * corresponding address is always reset to
2526 * the Preferred Lifetime in the received
2527 * Prefix Information option, regardless of
2528 * whether the valid lifetime is also reset or
2529 * ignored."
2530 *
2531 * So we should always update prefered_lft here.
2532 */
2533 update_lft = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002534 }
2535
2536 if (update_lft) {
2537 ifp->valid_lft = valid_lft;
2538 ifp->prefered_lft = prefered_lft;
2539 ifp->tstamp = now;
2540 flags = ifp->flags;
2541 ifp->flags &= ~IFA_F_DEPRECATED;
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01002542 spin_unlock_bh(&ifp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002543
2544 if (!(flags&IFA_F_TENTATIVE))
2545 ipv6_ifa_notify(0, ifp);
2546 } else
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01002547 spin_unlock_bh(&ifp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002548
Jiri Pirko53bd6742013-12-06 09:45:22 +01002549 manage_tempaddrs(in6_dev, ifp, valid_lft, prefered_lft,
2550 create, now);
David S. Miller5d9efa72013-10-28 20:07:50 -04002551
Linus Torvalds1da177e2005-04-16 15:20:36 -07002552 in6_ifa_put(ifp);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01002553 addrconf_verify();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002554 }
2555 }
2556 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
2557 in6_dev_put(in6_dev);
2558}
2559
2560/*
2561 * Set destination address.
2562 * Special case for SIT interfaces where we create a new "virtual"
2563 * device.
2564 */
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002565int addrconf_set_dstaddr(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002566{
2567 struct in6_ifreq ireq;
2568 struct net_device *dev;
2569 int err = -EINVAL;
2570
2571 rtnl_lock();
2572
2573 err = -EFAULT;
2574 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2575 goto err_exit;
2576
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002577 dev = __dev_get_by_index(net, ireq.ifr6_ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002578
2579 err = -ENODEV;
Ian Morris63159f22015-03-29 14:00:04 +01002580 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002581 goto err_exit;
2582
Amerigo Wang07a93622012-10-29 16:23:10 +00002583#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002584 if (dev->type == ARPHRD_SIT) {
Stephen Hemminger5bc3eb72008-11-19 21:52:05 -08002585 const struct net_device_ops *ops = dev->netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002586 struct ifreq ifr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002587 struct ip_tunnel_parm p;
2588
2589 err = -EADDRNOTAVAIL;
2590 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
2591 goto err_exit;
2592
2593 memset(&p, 0, sizeof(p));
2594 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
2595 p.iph.saddr = 0;
2596 p.iph.version = 4;
2597 p.iph.ihl = 5;
2598 p.iph.protocol = IPPROTO_IPV6;
2599 p.iph.ttl = 64;
Stephen Hemmingerd20b3102008-01-21 00:48:43 -08002600 ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002601
Stephen Hemminger5bc3eb72008-11-19 21:52:05 -08002602 if (ops->ndo_do_ioctl) {
2603 mm_segment_t oldfs = get_fs();
2604
2605 set_fs(KERNEL_DS);
2606 err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL);
2607 set_fs(oldfs);
2608 } else
2609 err = -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002610
2611 if (err == 0) {
2612 err = -ENOBUFS;
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002613 dev = __dev_get_by_name(net, p.name);
2614 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002615 goto err_exit;
2616 err = dev_open(dev);
2617 }
2618 }
Joerg Roedel0be669b2006-10-10 14:49:53 -07002619#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002620
2621err_exit:
2622 rtnl_unlock();
2623 return err;
2624}
2625
Madhu Challa93a714d2015-02-25 09:58:35 -08002626static int ipv6_mc_config(struct sock *sk, bool join,
2627 const struct in6_addr *addr, int ifindex)
2628{
2629 int ret;
2630
2631 ASSERT_RTNL();
2632
2633 lock_sock(sk);
2634 if (join)
Marcelo Ricardo Leitner54ff9ef2015-03-18 14:50:43 -03002635 ret = ipv6_sock_mc_join(sk, ifindex, addr);
Madhu Challa93a714d2015-02-25 09:58:35 -08002636 else
Marcelo Ricardo Leitner54ff9ef2015-03-18 14:50:43 -03002637 ret = ipv6_sock_mc_drop(sk, ifindex, addr);
Madhu Challa93a714d2015-02-25 09:58:35 -08002638 release_sock(sk);
2639
2640 return ret;
2641}
2642
Linus Torvalds1da177e2005-04-16 15:20:36 -07002643/*
2644 * Manual configuration of address on an interface
2645 */
Jiri Pirko479840f2013-12-06 09:45:21 +01002646static int inet6_addr_add(struct net *net, int ifindex,
2647 const struct in6_addr *pfx,
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00002648 const struct in6_addr *peer_pfx,
Jiri Pirko479840f2013-12-06 09:45:21 +01002649 unsigned int plen, __u32 ifa_flags,
2650 __u32 prefered_lft, __u32 valid_lft)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002651{
2652 struct inet6_ifaddr *ifp;
2653 struct inet6_dev *idev;
2654 struct net_device *dev;
Madhu Challa93a714d2015-02-25 09:58:35 -08002655 unsigned long timeout;
2656 clock_t expires;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002657 int scope;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002658 u32 flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002659
2660 ASSERT_RTNL();
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002661
Thomas Graf24ef0da2008-05-28 16:54:22 +02002662 if (plen > 128)
2663 return -EINVAL;
2664
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002665 /* check the lifetime */
2666 if (!valid_lft || prefered_lft > valid_lft)
2667 return -EINVAL;
2668
Jiri Pirko53bd6742013-12-06 09:45:22 +01002669 if (ifa_flags & IFA_F_MANAGETEMPADDR && plen != 64)
2670 return -EINVAL;
2671
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002672 dev = __dev_get_by_index(net, ifindex);
2673 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002674 return -ENODEV;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002675
Brian Haley64e724f2010-07-20 10:34:30 +00002676 idev = addrconf_add_dev(dev);
2677 if (IS_ERR(idev))
2678 return PTR_ERR(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002679
Madhu Challa93a714d2015-02-25 09:58:35 -08002680 if (ifa_flags & IFA_F_MCAUTOJOIN) {
2681 int ret = ipv6_mc_config(net->ipv6.mc_autojoin_sk,
2682 true, pfx, ifindex);
2683
2684 if (ret < 0)
2685 return ret;
2686 }
2687
Linus Torvalds1da177e2005-04-16 15:20:36 -07002688 scope = ipv6_addr_scope(pfx);
2689
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002690 timeout = addrconf_timeout_fixup(valid_lft, HZ);
2691 if (addrconf_finite_timeout(timeout)) {
2692 expires = jiffies_to_clock_t(timeout * HZ);
2693 valid_lft = timeout;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002694 flags = RTF_EXPIRES;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002695 } else {
2696 expires = 0;
2697 flags = 0;
2698 ifa_flags |= IFA_F_PERMANENT;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07002699 }
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002700
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09002701 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
2702 if (addrconf_finite_timeout(timeout)) {
2703 if (timeout == 0)
2704 ifa_flags |= IFA_F_DEPRECATED;
2705 prefered_lft = timeout;
2706 }
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002707
Jiri Benc8a226b22013-08-01 10:41:28 +02002708 ifp = ipv6_add_addr(idev, pfx, peer_pfx, plen, scope, ifa_flags,
2709 valid_lft, prefered_lft);
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09002710
Linus Torvalds1da177e2005-04-16 15:20:36 -07002711 if (!IS_ERR(ifp)) {
Thomas Haller761aac72014-01-15 15:36:58 +01002712 if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) {
2713 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
2714 expires, flags);
2715 }
2716
Neil Horman95c385b2007-04-25 17:08:10 -07002717 /*
2718 * Note that section 3.1 of RFC 4429 indicates
2719 * that the Optimistic flag should not be set for
2720 * manually configured addresses
2721 */
David S. Millercf22f9a2012-04-14 21:37:40 -04002722 addrconf_dad_start(ifp);
Jiri Pirko53bd6742013-12-06 09:45:22 +01002723 if (ifa_flags & IFA_F_MANAGETEMPADDR)
2724 manage_tempaddrs(idev, ifp, valid_lft, prefered_lft,
2725 true, jiffies);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002726 in6_ifa_put(ifp);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01002727 addrconf_verify_rtnl();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002728 return 0;
Madhu Challa93a714d2015-02-25 09:58:35 -08002729 } else if (ifa_flags & IFA_F_MCAUTOJOIN) {
2730 ipv6_mc_config(net->ipv6.mc_autojoin_sk,
2731 false, pfx, ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002732 }
2733
2734 return PTR_ERR(ifp);
2735}
2736
Heiner Kallweit6046d5b2014-04-20 21:29:36 +02002737static int inet6_addr_del(struct net *net, int ifindex, u32 ifa_flags,
2738 const struct in6_addr *pfx, unsigned int plen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002739{
2740 struct inet6_ifaddr *ifp;
2741 struct inet6_dev *idev;
2742 struct net_device *dev;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002743
Thomas Graf24ef0da2008-05-28 16:54:22 +02002744 if (plen > 128)
2745 return -EINVAL;
2746
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002747 dev = __dev_get_by_index(net, ifindex);
2748 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002749 return -ENODEV;
2750
Ian Morrise5d08d72014-11-23 21:28:43 +00002751 idev = __in6_dev_get(dev);
Ian Morris63159f22015-03-29 14:00:04 +01002752 if (!idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002753 return -ENXIO;
2754
2755 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00002756 list_for_each_entry(ifp, &idev->addr_list, if_list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002757 if (ifp->prefix_len == plen &&
2758 ipv6_addr_equal(pfx, &ifp->addr)) {
2759 in6_ifa_hold(ifp);
2760 read_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002761
Heiner Kallweit6046d5b2014-04-20 21:29:36 +02002762 if (!(ifp->flags & IFA_F_TEMPORARY) &&
2763 (ifa_flags & IFA_F_MANAGETEMPADDR))
2764 manage_tempaddrs(idev, ifp, 0, 0, false,
2765 jiffies);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002766 ipv6_del_addr(ifp);
Heiner Kallweit6046d5b2014-04-20 21:29:36 +02002767 addrconf_verify_rtnl();
Madhu Challa93a714d2015-02-25 09:58:35 -08002768 if (ipv6_addr_is_multicast(pfx)) {
2769 ipv6_mc_config(net->ipv6.mc_autojoin_sk,
2770 false, pfx, dev->ifindex);
2771 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002772 return 0;
2773 }
2774 }
2775 read_unlock_bh(&idev->lock);
2776 return -EADDRNOTAVAIL;
2777}
2778
2779
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002780int addrconf_add_ifaddr(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002781{
2782 struct in6_ifreq ireq;
2783 int err;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002784
Eric W. Biedermanaf31f412012-11-16 03:03:06 +00002785 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002786 return -EPERM;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002787
Linus Torvalds1da177e2005-04-16 15:20:36 -07002788 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2789 return -EFAULT;
2790
2791 rtnl_lock();
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00002792 err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, NULL,
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002793 ireq.ifr6_prefixlen, IFA_F_PERMANENT,
2794 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002795 rtnl_unlock();
2796 return err;
2797}
2798
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002799int addrconf_del_ifaddr(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002800{
2801 struct in6_ifreq ireq;
2802 int err;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002803
Eric W. Biedermanaf31f412012-11-16 03:03:06 +00002804 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002805 return -EPERM;
2806
2807 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2808 return -EFAULT;
2809
2810 rtnl_lock();
Heiner Kallweit6046d5b2014-04-20 21:29:36 +02002811 err = inet6_addr_del(net, ireq.ifr6_ifindex, 0, &ireq.ifr6_addr,
Daniel Lezcanoaf284932008-03-05 10:46:57 -08002812 ireq.ifr6_prefixlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002813 rtnl_unlock();
2814 return err;
2815}
2816
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002817static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
2818 int plen, int scope)
2819{
2820 struct inet6_ifaddr *ifp;
2821
Jiri Benc8a226b22013-08-01 10:41:28 +02002822 ifp = ipv6_add_addr(idev, addr, NULL, plen,
Hannes Frederic Sowa07edd742014-01-08 15:43:22 +01002823 scope, IFA_F_PERMANENT,
2824 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002825 if (!IS_ERR(ifp)) {
2826 spin_lock_bh(&ifp->lock);
2827 ifp->flags &= ~IFA_F_TENTATIVE;
2828 spin_unlock_bh(&ifp->lock);
2829 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2830 in6_ifa_put(ifp);
2831 }
2832}
2833
Amerigo Wang07a93622012-10-29 16:23:10 +00002834#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002835static void sit_add_v4_addrs(struct inet6_dev *idev)
2836{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002837 struct in6_addr addr;
2838 struct net_device *dev;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09002839 struct net *net = dev_net(idev->dev);
Nicolas Dichtel929c9cf2013-11-14 13:51:05 +01002840 int scope, plen;
Nicolas Dichtelf0e2acf2013-11-14 13:51:06 +01002841 u32 pflags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002842
2843 ASSERT_RTNL();
2844
2845 memset(&addr, 0, sizeof(struct in6_addr));
2846 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2847
2848 if (idev->dev->flags&IFF_POINTOPOINT) {
2849 addr.s6_addr32[0] = htonl(0xfe800000);
2850 scope = IFA_LINK;
Nicolas Dichtel929c9cf2013-11-14 13:51:05 +01002851 plen = 64;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002852 } else {
2853 scope = IPV6_ADDR_COMPATv4;
Nicolas Dichtel929c9cf2013-11-14 13:51:05 +01002854 plen = 96;
Nicolas Dichtelf0e2acf2013-11-14 13:51:06 +01002855 pflags |= RTF_NONEXTHOP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002856 }
2857
2858 if (addr.s6_addr32[3]) {
Nicolas Dichtel929c9cf2013-11-14 13:51:05 +01002859 add_addr(idev, &addr, plen, scope);
Nicolas Dichtelf0e2acf2013-11-14 13:51:06 +01002860 addrconf_prefix_route(&addr, plen, idev->dev, 0, pflags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002861 return;
2862 }
2863
Benjamin Thery6fda7352008-03-05 10:47:47 -08002864 for_each_netdev(net, dev) {
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002865 struct in_device *in_dev = __in_dev_get_rtnl(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002866 if (in_dev && (dev->flags & IFF_UP)) {
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002867 struct in_ifaddr *ifa;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002868
2869 int flag = scope;
2870
2871 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002872
2873 addr.s6_addr32[3] = ifa->ifa_local;
2874
2875 if (ifa->ifa_scope == RT_SCOPE_LINK)
2876 continue;
2877 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2878 if (idev->dev->flags&IFF_POINTOPOINT)
2879 continue;
2880 flag |= IFA_HOST;
2881 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002882
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002883 add_addr(idev, &addr, plen, flag);
Nicolas Dichtelf0e2acf2013-11-14 13:51:06 +01002884 addrconf_prefix_route(&addr, plen, idev->dev, 0,
2885 pflags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002886 }
2887 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002888 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002889}
Joerg Roedel0be669b2006-10-10 14:49:53 -07002890#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002891
2892static void init_loopback(struct net_device *dev)
2893{
2894 struct inet6_dev *idev;
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05302895 struct net_device *sp_dev;
2896 struct inet6_ifaddr *sp_ifa;
2897 struct rt6_info *sp_rt;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002898
2899 /* ::1 */
2900
2901 ASSERT_RTNL();
2902
Ian Morrise5d08d72014-11-23 21:28:43 +00002903 idev = ipv6_find_idev(dev);
Ian Morris63159f22015-03-29 14:00:04 +01002904 if (!idev) {
Joe Perches91df42b2012-05-15 14:11:54 +00002905 pr_debug("%s: add_dev failed\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002906 return;
2907 }
2908
Ilpo Järvinenb5f348e2009-02-06 23:48:01 -08002909 add_addr(idev, &in6addr_loopback, 128, IFA_HOST);
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05302910
2911 /* Add routes to other interface's IPv6 addresses */
2912 for_each_netdev(dev_net(dev), sp_dev) {
2913 if (!strcmp(sp_dev->name, dev->name))
2914 continue;
2915
2916 idev = __in6_dev_get(sp_dev);
2917 if (!idev)
2918 continue;
2919
2920 read_lock_bh(&idev->lock);
2921 list_for_each_entry(sp_ifa, &idev->addr_list, if_list) {
2922
2923 if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE))
2924 continue;
2925
Gao feng33d99112014-01-24 16:29:11 +08002926 if (sp_ifa->rt) {
2927 /* This dst has been added to garbage list when
2928 * lo device down, release this obsolete dst and
2929 * reallocate a new router for ifa.
2930 */
2931 if (sp_ifa->rt->dst.obsolete > 0) {
2932 ip6_rt_put(sp_ifa->rt);
2933 sp_ifa->rt = NULL;
2934 } else {
2935 continue;
2936 }
2937 }
Gao fenga881ae12013-06-16 11:14:30 +08002938
François-Xavier Le Bail57ec0af2013-12-02 11:28:49 +01002939 sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, false);
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05302940
2941 /* Failure cases are ignored */
Gao feng534c8772013-06-02 22:16:21 +00002942 if (!IS_ERR(sp_rt)) {
2943 sp_ifa->rt = sp_rt;
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05302944 ip6_ins_rt(sp_rt);
Gao feng534c8772013-06-02 22:16:21 +00002945 }
Balakumaran Kannan25fb6ca42013-04-02 16:15:05 +05302946 }
2947 read_unlock_bh(&idev->lock);
2948 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002949}
2950
Hannes Frederic Sowa64236f32015-03-23 23:36:02 +01002951static void addrconf_add_linklocal(struct inet6_dev *idev,
2952 const struct in6_addr *addr, u32 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002953{
Eldad Zack8e5e8f32012-04-01 07:49:08 +00002954 struct inet6_ifaddr *ifp;
Hannes Frederic Sowa64236f32015-03-23 23:36:02 +01002955 u32 addr_flags = flags | IFA_F_PERMANENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002956
Neil Horman95c385b2007-04-25 17:08:10 -07002957#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2958 if (idev->cnf.optimistic_dad &&
David Miller702beb82008-07-20 18:17:02 -07002959 !dev_net(idev->dev)->ipv6.devconf_all->forwarding)
Neil Horman95c385b2007-04-25 17:08:10 -07002960 addr_flags |= IFA_F_OPTIMISTIC;
2961#endif
2962
Hannes Frederic Sowa07edd742014-01-08 15:43:22 +01002963 ifp = ipv6_add_addr(idev, addr, NULL, 64, IFA_LINK, addr_flags,
2964 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002965 if (!IS_ERR(ifp)) {
YOSHIFUJI Hideaki46d48042007-02-07 20:36:26 +09002966 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
David S. Millercf22f9a2012-04-14 21:37:40 -04002967 addrconf_dad_start(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002968 in6_ifa_put(ifp);
2969 }
2970}
2971
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01002972static bool ipv6_reserved_interfaceid(struct in6_addr address)
2973{
2974 if ((address.s6_addr32[2] | address.s6_addr32[3]) == 0)
2975 return true;
2976
2977 if (address.s6_addr32[2] == htonl(0x02005eff) &&
2978 ((address.s6_addr32[3] & htonl(0xfe000000)) == htonl(0xfe000000)))
2979 return true;
2980
2981 if (address.s6_addr32[2] == htonl(0xfdffffff) &&
2982 ((address.s6_addr32[3] & htonl(0xffffff80)) == htonl(0xffffff80)))
2983 return true;
2984
2985 return false;
2986}
2987
2988static int ipv6_generate_stable_address(struct in6_addr *address,
2989 u8 dad_count,
2990 const struct inet6_dev *idev)
2991{
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01002992 static DEFINE_SPINLOCK(lock);
2993 static __u32 digest[SHA_DIGEST_WORDS];
2994 static __u32 workspace[SHA_WORKSPACE_WORDS];
2995
2996 static union {
2997 char __data[SHA_MESSAGE_BYTES];
2998 struct {
2999 struct in6_addr secret;
Hannes Frederic Sowaff402172015-03-24 11:05:28 +01003000 __be32 prefix[2];
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01003001 unsigned char hwaddr[MAX_ADDR_LEN];
3002 u8 dad_count;
3003 } __packed;
3004 } data;
3005
3006 struct in6_addr secret;
3007 struct in6_addr temp;
3008 struct net *net = dev_net(idev->dev);
3009
3010 BUILD_BUG_ON(sizeof(data.__data) != sizeof(data));
3011
3012 if (idev->cnf.stable_secret.initialized)
3013 secret = idev->cnf.stable_secret.secret;
3014 else if (net->ipv6.devconf_dflt->stable_secret.initialized)
3015 secret = net->ipv6.devconf_dflt->stable_secret.secret;
3016 else
3017 return -1;
3018
3019retry:
3020 spin_lock_bh(&lock);
3021
3022 sha_init(digest);
3023 memset(&data, 0, sizeof(data));
3024 memset(workspace, 0, sizeof(workspace));
3025 memcpy(data.hwaddr, idev->dev->perm_addr, idev->dev->addr_len);
Hannes Frederic Sowaff402172015-03-24 11:05:28 +01003026 data.prefix[0] = address->s6_addr32[0];
3027 data.prefix[1] = address->s6_addr32[1];
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01003028 data.secret = secret;
3029 data.dad_count = dad_count;
3030
3031 sha_transform(digest, data.__data, workspace);
3032
3033 temp = *address;
Hannes Frederic Sowaff402172015-03-24 11:05:28 +01003034 temp.s6_addr32[2] = (__force __be32)digest[0];
3035 temp.s6_addr32[3] = (__force __be32)digest[1];
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01003036
3037 spin_unlock_bh(&lock);
3038
3039 if (ipv6_reserved_interfaceid(temp)) {
3040 dad_count++;
Hannes Frederic Sowa1855b7c2015-03-23 23:36:05 +01003041 if (dad_count > dev_net(idev->dev)->ipv6.sysctl.idgen_retries)
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01003042 return -1;
3043 goto retry;
3044 }
3045
3046 *address = temp;
3047 return 0;
3048}
3049
Bjørn Morkcc9da6c2015-12-16 16:44:38 +01003050static void ipv6_gen_mode_random_init(struct inet6_dev *idev)
3051{
3052 struct ipv6_stable_secret *s = &idev->cnf.stable_secret;
3053
3054 if (s->initialized)
3055 return;
3056 s = &idev->cnf.stable_secret;
3057 get_random_bytes(&s->secret, sizeof(s->secret));
3058 s->initialized = true;
3059}
3060
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02003061static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route)
3062{
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01003063 struct in6_addr addr;
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02003064
David Ahernca254492015-10-12 11:47:10 -07003065 /* no link local addresses on L3 master devices */
3066 if (netif_is_l3_master(idev->dev))
3067 return;
3068
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01003069 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
3070
Bjørn Morkcc9da6c2015-12-16 16:44:38 +01003071 switch (idev->addr_gen_mode) {
3072 case IN6_ADDR_GEN_MODE_RANDOM:
3073 ipv6_gen_mode_random_init(idev);
3074 /* fallthrough */
3075 case IN6_ADDR_GEN_MODE_STABLE_PRIVACY:
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01003076 if (!ipv6_generate_stable_address(&addr, 0, idev))
Hannes Frederic Sowa64236f32015-03-23 23:36:02 +01003077 addrconf_add_linklocal(idev, &addr,
3078 IFA_F_STABLE_PRIVACY);
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01003079 else if (prefix_route)
3080 addrconf_prefix_route(&addr, 64, idev->dev, 0, 0);
Bjørn Morkcc9da6c2015-12-16 16:44:38 +01003081 break;
3082 case IN6_ADDR_GEN_MODE_EUI64:
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02003083 /* addrconf_add_linklocal also adds a prefix_route and we
3084 * only need to care about prefix routes if ipv6_generate_eui64
3085 * couldn't generate one.
3086 */
3087 if (ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) == 0)
Hannes Frederic Sowa64236f32015-03-23 23:36:02 +01003088 addrconf_add_linklocal(idev, &addr, 0);
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02003089 else if (prefix_route)
3090 addrconf_prefix_route(&addr, 64, idev->dev, 0, 0);
Bjørn Morkcc9da6c2015-12-16 16:44:38 +01003091 break;
3092 case IN6_ADDR_GEN_MODE_NONE:
3093 default:
3094 /* will not add any link local address */
3095 break;
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02003096 }
3097}
3098
Linus Torvalds1da177e2005-04-16 15:20:36 -07003099static void addrconf_dev_config(struct net_device *dev)
3100{
Eldad Zack8e5e8f32012-04-01 07:49:08 +00003101 struct inet6_dev *idev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003102
3103 ASSERT_RTNL();
3104
Herbert Xu74235a22007-06-14 13:02:55 -07003105 if ((dev->type != ARPHRD_ETHER) &&
3106 (dev->type != ARPHRD_FDDI) &&
Herbert Xu74235a22007-06-14 13:02:55 -07003107 (dev->type != ARPHRD_ARCNET) &&
alex.bluesman.smirnov@gmail.com06a4c1c2012-05-10 03:25:52 +00003108 (dev->type != ARPHRD_INFINIBAND) &&
Nicolas Dichtele8377352013-08-20 12:16:06 +02003109 (dev->type != ARPHRD_IEEE1394) &&
Jukka Rissanene74bccb2013-12-11 17:05:36 +02003110 (dev->type != ARPHRD_TUNNEL6) &&
Bjørn Morkcc9da6c2015-12-16 16:44:38 +01003111 (dev->type != ARPHRD_6LOWPAN) &&
3112 (dev->type != ARPHRD_NONE)) {
Herbert Xu74235a22007-06-14 13:02:55 -07003113 /* Alas, we support only Ethernet autoconfiguration. */
3114 return;
3115 }
3116
Linus Torvalds1da177e2005-04-16 15:20:36 -07003117 idev = addrconf_add_dev(dev);
Brian Haley64e724f2010-07-20 10:34:30 +00003118 if (IS_ERR(idev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003119 return;
3120
Bjørn Morkcc9da6c2015-12-16 16:44:38 +01003121 /* this device type has no EUI support */
3122 if (dev->type == ARPHRD_NONE &&
3123 idev->addr_gen_mode == IN6_ADDR_GEN_MODE_EUI64)
3124 idev->addr_gen_mode = IN6_ADDR_GEN_MODE_RANDOM;
3125
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02003126 addrconf_addr_gen(idev, false);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003127}
3128
Amerigo Wang07a93622012-10-29 16:23:10 +00003129#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003130static void addrconf_sit_config(struct net_device *dev)
3131{
3132 struct inet6_dev *idev;
3133
3134 ASSERT_RTNL();
3135
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003136 /*
3137 * Configure the tunnel with one of our IPv4
3138 * addresses... we should configure all of
Linus Torvalds1da177e2005-04-16 15:20:36 -07003139 * our v4 addrs in the tunnel
3140 */
3141
Ian Morrise5d08d72014-11-23 21:28:43 +00003142 idev = ipv6_find_idev(dev);
Ian Morris63159f22015-03-29 14:00:04 +01003143 if (!idev) {
Joe Perches91df42b2012-05-15 14:11:54 +00003144 pr_debug("%s: add_dev failed\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003145 return;
3146 }
3147
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11003148 if (dev->priv_flags & IFF_ISATAP) {
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02003149 addrconf_addr_gen(idev, false);
Fred L. Templinc7dc89c2007-11-29 22:11:40 +11003150 return;
3151 }
3152
Linus Torvalds1da177e2005-04-16 15:20:36 -07003153 sit_add_v4_addrs(idev);
3154
Nicolas Dichtel62b54dd2012-10-01 23:19:14 +00003155 if (dev->flags&IFF_POINTOPOINT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003156 addrconf_add_mroute(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003157}
Joerg Roedel0be669b2006-10-10 14:49:53 -07003158#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07003159
Amerigo Wang07a93622012-10-29 16:23:10 +00003160#if IS_ENABLED(CONFIG_NET_IPGRE)
stephen hemmingeraee80b52011-06-08 10:44:30 +00003161static void addrconf_gre_config(struct net_device *dev)
3162{
3163 struct inet6_dev *idev;
stephen hemmingeraee80b52011-06-08 10:44:30 +00003164
stephen hemmingeraee80b52011-06-08 10:44:30 +00003165 ASSERT_RTNL();
3166
Ian Morrise5d08d72014-11-23 21:28:43 +00003167 idev = ipv6_find_idev(dev);
Ian Morris63159f22015-03-29 14:00:04 +01003168 if (!idev) {
Joe Perches91df42b2012-05-15 14:11:54 +00003169 pr_debug("%s: add_dev failed\n", __func__);
stephen hemmingeraee80b52011-06-08 10:44:30 +00003170 return;
3171 }
3172
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02003173 addrconf_addr_gen(idev, true);
Hannes Frederic Sowad9e4ce62015-10-08 18:19:39 +02003174 if (dev->flags & IFF_POINTOPOINT)
3175 addrconf_add_mroute(dev);
stephen hemmingeraee80b52011-06-08 10:44:30 +00003176}
3177#endif
3178
David Ahern4f25a112016-02-27 09:59:17 -08003179#if IS_ENABLED(CONFIG_NET_L3_MASTER_DEV)
3180/* If the host route is cached on the addr struct make sure it is associated
3181 * with the proper table. e.g., enslavement can change and if so the cached
3182 * host route needs to move to the new table.
3183 */
3184static void l3mdev_check_host_rt(struct inet6_dev *idev,
3185 struct inet6_ifaddr *ifp)
3186{
3187 if (ifp->rt) {
3188 u32 tb_id = l3mdev_fib_table(idev->dev) ? : RT6_TABLE_LOCAL;
3189
3190 if (tb_id != ifp->rt->rt6i_table->tb6_id) {
3191 ip6_del_rt(ifp->rt);
3192 ifp->rt = NULL;
3193 }
3194 }
3195}
3196#else
3197static void l3mdev_check_host_rt(struct inet6_dev *idev,
3198 struct inet6_ifaddr *ifp)
3199{
3200}
3201#endif
3202
David Ahernf1705ec2016-02-24 09:25:37 -08003203static int fixup_permanent_addr(struct inet6_dev *idev,
3204 struct inet6_ifaddr *ifp)
3205{
David Ahern4f25a112016-02-27 09:59:17 -08003206 l3mdev_check_host_rt(idev, ifp);
3207
David Ahernf1705ec2016-02-24 09:25:37 -08003208 if (!ifp->rt) {
3209 struct rt6_info *rt;
3210
3211 rt = addrconf_dst_alloc(idev, &ifp->addr, false);
3212 if (unlikely(IS_ERR(rt)))
3213 return PTR_ERR(rt);
3214
3215 ifp->rt = rt;
3216 }
3217
3218 if (!(ifp->flags & IFA_F_NOPREFIXROUTE)) {
3219 addrconf_prefix_route(&ifp->addr, ifp->prefix_len,
3220 idev->dev, 0, 0);
3221 }
3222
3223 addrconf_dad_start(ifp);
3224
3225 return 0;
3226}
3227
3228static void addrconf_permanent_addr(struct net_device *dev)
3229{
3230 struct inet6_ifaddr *ifp, *tmp;
3231 struct inet6_dev *idev;
3232
3233 idev = __in6_dev_get(dev);
3234 if (!idev)
3235 return;
3236
3237 write_lock_bh(&idev->lock);
3238
3239 list_for_each_entry_safe(ifp, tmp, &idev->addr_list, if_list) {
3240 if ((ifp->flags & IFA_F_PERMANENT) &&
3241 fixup_permanent_addr(idev, ifp) < 0) {
3242 write_unlock_bh(&idev->lock);
3243 ipv6_del_addr(ifp);
3244 write_lock_bh(&idev->lock);
3245
3246 net_info_ratelimited("%s: Failed to add prefix route for address %pI6c; dropping\n",
3247 idev->dev->name, &ifp->addr);
3248 }
3249 }
3250
3251 write_unlock_bh(&idev->lock);
3252}
3253
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003254static int addrconf_notify(struct notifier_block *this, unsigned long event,
Jiri Pirko351638e2013-05-28 01:30:21 +00003255 void *ptr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003256{
Jiri Pirko351638e2013-05-28 01:30:21 +00003257 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Eric Dumazet748e2d92012-08-22 21:50:59 +00003258 struct inet6_dev *idev = __in6_dev_get(dev);
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09003259 int run_pending = 0;
Herbert Xub217d612007-07-30 17:04:52 -07003260 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003261
Stephen Hemmingere21e8462010-03-20 16:09:01 -07003262 switch (event) {
YOSHIFUJI Hideaki45ba9dd2007-02-15 02:07:27 +09003263 case NETDEV_REGISTER:
Herbert Xu74235a22007-06-14 13:02:55 -07003264 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
YOSHIFUJI Hideaki45ba9dd2007-02-15 02:07:27 +09003265 idev = ipv6_add_dev(dev);
WANG Conga317a2f2014-07-25 15:25:09 -07003266 if (IS_ERR(idev))
3267 return notifier_from_errno(PTR_ERR(idev));
YOSHIFUJI Hideaki45ba9dd2007-02-15 02:07:27 +09003268 }
3269 break;
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003270
Alexander Duyckb7b0b1d2015-10-26 11:06:33 -07003271 case NETDEV_CHANGEMTU:
3272 /* if MTU under IPV6_MIN_MTU stop IPv6 on this interface. */
3273 if (dev->mtu < IPV6_MIN_MTU) {
3274 addrconf_ifdown(dev, 1);
3275 break;
3276 }
3277
3278 if (idev) {
3279 rt6_mtu_change(dev, dev->mtu);
3280 idev->cnf.mtu6 = dev->mtu;
3281 break;
3282 }
3283
3284 /* allocate new idev */
3285 idev = ipv6_add_dev(dev);
3286 if (IS_ERR(idev))
3287 break;
3288
3289 /* device is still not ready */
3290 if (!(idev->if_flags & IF_READY))
3291 break;
3292
3293 run_pending = 1;
3294
3295 /* fall through */
3296
Linus Torvalds1da177e2005-04-16 15:20:36 -07003297 case NETDEV_UP:
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003298 case NETDEV_CHANGE:
Jay Vosburghc2edacf2007-07-09 10:42:47 -07003299 if (dev->flags & IFF_SLAVE)
3300 break;
3301
WANG Cong3ce62a82014-09-11 15:07:16 -07003302 if (idev && idev->cnf.disable_ipv6)
3303 break;
3304
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003305 if (event == NETDEV_UP) {
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -07003306 if (!addrconf_qdisc_ok(dev)) {
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003307 /* device is not ready yet. */
Joe Perchesf3213832012-05-15 14:11:53 +00003308 pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n",
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003309 dev->name);
3310 break;
3311 }
Kristian Slavov99081042006-02-08 16:10:53 -08003312
Evgeniy Polyakovd31c7b82007-11-30 23:36:08 +11003313 if (!idev && dev->mtu >= IPV6_MIN_MTU)
3314 idev = ipv6_add_dev(dev);
3315
WANG Conga317a2f2014-07-25 15:25:09 -07003316 if (!IS_ERR_OR_NULL(idev)) {
Kristian Slavov99081042006-02-08 16:10:53 -08003317 idev->if_flags |= IF_READY;
Benjamin Therye3ec6cf2008-11-05 01:43:57 -08003318 run_pending = 1;
3319 }
Alexander Duyckb7b0b1d2015-10-26 11:06:33 -07003320 } else if (event == NETDEV_CHANGE) {
Mitsuru Chinenf24e3d62007-10-10 02:53:43 -07003321 if (!addrconf_qdisc_ok(dev)) {
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003322 /* device is still not ready. */
3323 break;
3324 }
3325
3326 if (idev) {
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003327 if (idev->if_flags & IF_READY)
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003328 /* device is already configured. */
3329 break;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003330 idev->if_flags |= IF_READY;
3331 }
3332
Joe Perchesf3213832012-05-15 14:11:53 +00003333 pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n",
3334 dev->name);
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003335
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09003336 run_pending = 1;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003337 }
3338
David Ahernf1705ec2016-02-24 09:25:37 -08003339 /* restore routes for permanent addresses */
3340 addrconf_permanent_addr(dev);
3341
Stephen Hemmingere21e8462010-03-20 16:09:01 -07003342 switch (dev->type) {
Amerigo Wang07a93622012-10-29 16:23:10 +00003343#if IS_ENABLED(CONFIG_IPV6_SIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003344 case ARPHRD_SIT:
3345 addrconf_sit_config(dev);
3346 break;
Joerg Roedel0be669b2006-10-10 14:49:53 -07003347#endif
Amerigo Wang07a93622012-10-29 16:23:10 +00003348#if IS_ENABLED(CONFIG_NET_IPGRE)
stephen hemmingeraee80b52011-06-08 10:44:30 +00003349 case ARPHRD_IPGRE:
3350 addrconf_gre_config(dev);
3351 break;
3352#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07003353 case ARPHRD_LOOPBACK:
3354 init_loopback(dev);
3355 break;
3356
3357 default:
3358 addrconf_dev_config(dev);
3359 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07003360 }
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003361
WANG Conga317a2f2014-07-25 15:25:09 -07003362 if (!IS_ERR_OR_NULL(idev)) {
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09003363 if (run_pending)
3364 addrconf_dad_run(idev);
3365
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003366 /*
3367 * If the MTU changed during the interface down,
3368 * when the interface up, the changed MTU must be
3369 * reflected in the idev as well as routers.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003370 */
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003371 if (idev->cnf.mtu6 != dev->mtu &&
3372 dev->mtu >= IPV6_MIN_MTU) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003373 rt6_mtu_change(dev, dev->mtu);
3374 idev->cnf.mtu6 = dev->mtu;
3375 }
3376 idev->tstamp = jiffies;
3377 inet6_ifinfo_notify(RTM_NEWLINK, idev);
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003378
3379 /*
3380 * If the changed mtu during down is lower than
3381 * IPV6_MIN_MTU stop IPv6 on this interface.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003382 */
3383 if (dev->mtu < IPV6_MIN_MTU)
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003384 addrconf_ifdown(dev, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003385 }
3386 break;
3387
Linus Torvalds1da177e2005-04-16 15:20:36 -07003388 case NETDEV_DOWN:
3389 case NETDEV_UNREGISTER:
3390 /*
3391 * Remove all addresses from this interface.
3392 */
3393 addrconf_ifdown(dev, event != NETDEV_DOWN);
3394 break;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003395
Linus Torvalds1da177e2005-04-16 15:20:36 -07003396 case NETDEV_CHANGENAME:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003397 if (idev) {
Stephen Hemminger5632c512007-04-28 21:16:39 -07003398 snmp6_unregister_dev(idev);
Pavel Emelyanov408c4762008-01-10 17:41:21 -08003399 addrconf_sysctl_unregister(idev);
WANG Conga317a2f2014-07-25 15:25:09 -07003400 err = addrconf_sysctl_register(idev);
Herbert Xub217d612007-07-30 17:04:52 -07003401 if (err)
3402 return notifier_from_errno(err);
WANG Conga317a2f2014-07-25 15:25:09 -07003403 err = snmp6_register_dev(idev);
3404 if (err) {
3405 addrconf_sysctl_unregister(idev);
3406 return notifier_from_errno(err);
3407 }
Stephen Hemminger5632c512007-04-28 21:16:39 -07003408 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003409 break;
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003410
Jiri Pirko93d9b7d2010-03-10 10:28:56 +00003411 case NETDEV_PRE_TYPE_CHANGE:
3412 case NETDEV_POST_TYPE_CHANGE:
Andrew Lunn3ef09522015-12-03 21:12:32 +01003413 if (idev)
3414 addrconf_type_change(dev, event);
Moni Shoua75c78502009-09-15 02:37:40 -07003415 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07003416 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003417
3418 return NOTIFY_OK;
3419}
3420
3421/*
3422 * addrconf module should be notified of a device going up
3423 */
3424static struct notifier_block ipv6_dev_notf = {
3425 .notifier_call = addrconf_notify,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003426};
3427
Jiri Pirko93d9b7d2010-03-10 10:28:56 +00003428static void addrconf_type_change(struct net_device *dev, unsigned long event)
Moni Shoua75c78502009-09-15 02:37:40 -07003429{
3430 struct inet6_dev *idev;
3431 ASSERT_RTNL();
3432
3433 idev = __in6_dev_get(dev);
3434
Jiri Pirko93d9b7d2010-03-10 10:28:56 +00003435 if (event == NETDEV_POST_TYPE_CHANGE)
Moni Shoua75c78502009-09-15 02:37:40 -07003436 ipv6_mc_remap(idev);
Jiri Pirko93d9b7d2010-03-10 10:28:56 +00003437 else if (event == NETDEV_PRE_TYPE_CHANGE)
Moni Shoua75c78502009-09-15 02:37:40 -07003438 ipv6_mc_unmap(idev);
3439}
3440
Linus Torvalds1da177e2005-04-16 15:20:36 -07003441static int addrconf_ifdown(struct net_device *dev, int how)
3442{
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09003443 struct net *net = dev_net(dev);
stephen hemminger502a2ff2010-03-17 20:31:13 +00003444 struct inet6_dev *idev;
David Ahernf1705ec2016-02-24 09:25:37 -08003445 struct inet6_ifaddr *ifa, *tmp;
3446 struct list_head del_list;
3447 int _keep_addr;
3448 bool keep_addr;
David S. Miller73a8bd72011-01-23 23:27:15 -08003449 int state, i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003450
3451 ASSERT_RTNL();
3452
David S. Miller73a8bd72011-01-23 23:27:15 -08003453 rt6_ifdown(net, dev);
3454 neigh_ifdown(&nd_tbl, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003455
3456 idev = __in6_dev_get(dev);
Ian Morris63159f22015-03-29 14:00:04 +01003457 if (!idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003458 return -ENODEV;
3459
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003460 /*
3461 * Step 1: remove reference to ipv6 device from parent device.
3462 * Do not dev_put!
Linus Torvalds1da177e2005-04-16 15:20:36 -07003463 */
Denis V. Lunev439e2382008-04-03 13:30:17 -07003464 if (how) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003465 idev->dead = 1;
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07003466
3467 /* protected by rtnl_lock */
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +00003468 RCU_INIT_POINTER(dev->ip6_ptr, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003469
3470 /* Step 1.5: remove snmp6 entry */
3471 snmp6_unregister_dev(idev);
3472
3473 }
3474
David Ahernf1705ec2016-02-24 09:25:37 -08003475 /* aggregate the system setting and interface setting */
3476 _keep_addr = net->ipv6.devconf_all->keep_addr_on_down;
3477 if (!_keep_addr)
3478 _keep_addr = idev->cnf.keep_addr_on_down;
3479
3480 /* combine the user config with event to determine if permanent
3481 * addresses are to be removed from address hash table
3482 */
3483 keep_addr = !(how || _keep_addr <= 0);
3484
David S. Miller73a8bd72011-01-23 23:27:15 -08003485 /* Step 2: clear hash table */
3486 for (i = 0; i < IN6_ADDR_HSIZE; i++) {
3487 struct hlist_head *h = &inet6_addr_lst[i];
David S. Miller73a8bd72011-01-23 23:27:15 -08003488
3489 spin_lock_bh(&addrconf_hash_lock);
Ian Morris67ba4152014-08-24 21:53:10 +01003490restart:
Sasha Levinb67bfe02013-02-27 17:06:00 -08003491 hlist_for_each_entry_rcu(ifa, h, addr_lst) {
David S. Miller73a8bd72011-01-23 23:27:15 -08003492 if (ifa->idev == idev) {
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003493 addrconf_del_dad_work(ifa);
David Ahernf1705ec2016-02-24 09:25:37 -08003494 /* combined flag + permanent flag decide if
3495 * address is retained on a down event
3496 */
3497 if (!keep_addr ||
3498 !(ifa->flags & IFA_F_PERMANENT)) {
3499 hlist_del_init_rcu(&ifa->addr_lst);
3500 goto restart;
3501 }
David S. Miller73a8bd72011-01-23 23:27:15 -08003502 }
3503 }
3504 spin_unlock_bh(&addrconf_hash_lock);
3505 }
3506
Linus Torvalds1da177e2005-04-16 15:20:36 -07003507 write_lock_bh(&idev->lock);
3508
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003509 addrconf_del_rs_timer(idev);
3510
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003511 /* Step 2: clear flags for stateless addrconf */
Denis V. Lunev439e2382008-04-03 13:30:17 -07003512 if (!how)
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003513 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003514
Denis V. Lunev439e2382008-04-03 13:30:17 -07003515 if (how && del_timer(&idev->regen_timer))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003516 in6_dev_put(idev);
3517
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003518 /* Step 3: clear tempaddr list */
stephen hemminger372e6c82010-03-17 20:31:09 +00003519 while (!list_empty(&idev->tempaddr_list)) {
3520 ifa = list_first_entry(&idev->tempaddr_list,
3521 struct inet6_ifaddr, tmp_list);
3522 list_del(&ifa->tmp_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003523 write_unlock_bh(&idev->lock);
3524 spin_lock_bh(&ifa->lock);
3525
3526 if (ifa->ifpub) {
3527 in6_ifa_put(ifa->ifpub);
3528 ifa->ifpub = NULL;
3529 }
3530 spin_unlock_bh(&ifa->lock);
3531 in6_ifa_put(ifa);
3532 write_lock_bh(&idev->lock);
3533 }
stephen hemminger8f37ada2010-03-03 08:19:59 +00003534
David Ahernf1705ec2016-02-24 09:25:37 -08003535 /* re-combine the user config with event to determine if permanent
3536 * addresses are to be removed from the interface list
3537 */
3538 keep_addr = (!how && _keep_addr > 0);
3539
3540 INIT_LIST_HEAD(&del_list);
3541 list_for_each_entry_safe(ifa, tmp, &idev->addr_list, if_list) {
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003542 addrconf_del_dad_work(ifa);
stephen hemminger84e8b802010-03-02 13:32:46 +00003543
David S. Miller73a8bd72011-01-23 23:27:15 -08003544 write_unlock_bh(&idev->lock);
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01003545 spin_lock_bh(&ifa->lock);
David Ahernf1705ec2016-02-24 09:25:37 -08003546
3547 if (keep_addr && (ifa->flags & IFA_F_PERMANENT)) {
3548 /* set state to skip the notifier below */
3549 state = INET6_IFADDR_STATE_DEAD;
3550 ifa->state = 0;
3551 if (!(ifa->flags & IFA_F_NODAD))
3552 ifa->flags |= IFA_F_TENTATIVE;
3553 } else {
3554 state = ifa->state;
3555 ifa->state = INET6_IFADDR_STATE_DEAD;
3556
3557 list_del(&ifa->if_list);
3558 list_add(&ifa->if_list, &del_list);
3559 }
3560
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01003561 spin_unlock_bh(&ifa->lock);
stephen hemminger84e8b802010-03-02 13:32:46 +00003562
David S. Miller73a8bd72011-01-23 23:27:15 -08003563 if (state != INET6_IFADDR_STATE_DEAD) {
3564 __ipv6_ifa_notify(RTM_DELADDR, ifa);
Cong Wangf88c91d2013-04-14 23:18:43 +08003565 inet6addr_notifier_call_chain(NETDEV_DOWN, ifa);
stephen hemminger27bdb2a2010-04-12 05:41:32 +00003566 }
stephen hemminger8f37ada2010-03-03 08:19:59 +00003567
David S. Miller73a8bd72011-01-23 23:27:15 -08003568 write_lock_bh(&idev->lock);
3569 }
stephen hemminger8f37ada2010-03-03 08:19:59 +00003570
Linus Torvalds1da177e2005-04-16 15:20:36 -07003571 write_unlock_bh(&idev->lock);
3572
David Ahernf1705ec2016-02-24 09:25:37 -08003573 /* now clean up addresses to be removed */
3574 while (!list_empty(&del_list)) {
3575 ifa = list_first_entry(&del_list,
3576 struct inet6_ifaddr, if_list);
3577 list_del(&ifa->if_list);
3578
3579 in6_ifa_put(ifa);
3580 }
3581
Sabrina Dubroca381f4dc2014-09-10 23:23:02 +02003582 /* Step 5: Discard anycast and multicast list */
3583 if (how) {
3584 ipv6_ac_destroy_dev(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003585 ipv6_mc_destroy_dev(idev);
Sabrina Dubroca381f4dc2014-09-10 23:23:02 +02003586 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003587 ipv6_mc_down(idev);
Sabrina Dubroca381f4dc2014-09-10 23:23:02 +02003588 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003589
Linus Torvalds1da177e2005-04-16 15:20:36 -07003590 idev->tstamp = jiffies;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003591
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07003592 /* Last: Shot the device (if unregistered) */
Denis V. Lunev439e2382008-04-03 13:30:17 -07003593 if (how) {
Pavel Emelyanov408c4762008-01-10 17:41:21 -08003594 addrconf_sysctl_unregister(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003595 neigh_parms_release(&nd_tbl, idev->nd_parms);
3596 neigh_ifdown(&nd_tbl, dev);
3597 in6_dev_put(idev);
3598 }
3599 return 0;
3600}
3601
3602static void addrconf_rs_timer(unsigned long data)
3603{
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003604 struct inet6_dev *idev = (struct inet6_dev *)data;
Cong Wangcaf92bc2013-08-31 13:44:32 +08003605 struct net_device *dev = idev->dev;
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003606 struct in6_addr lladdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003607
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003608 write_lock(&idev->lock);
stephen hemminger5b2a1952010-03-02 13:32:45 +00003609 if (idev->dead || !(idev->if_flags & IF_READY))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003610 goto out;
3611
Shmulik Ladkani9ba2add2012-12-02 01:44:53 +00003612 if (!ipv6_accept_ra(idev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003613 goto out;
stephen hemminger5b2a1952010-03-02 13:32:45 +00003614
3615 /* Announcement received after solicitation was sent */
3616 if (idev->if_flags & IF_RA_RCVD)
3617 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003618
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003619 if (idev->rs_probes++ < idev->cnf.rtr_solicits) {
Cong Wangcaf92bc2013-08-31 13:44:32 +08003620 write_unlock(&idev->lock);
3621 if (!ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE))
3622 ndisc_send_rs(dev, &lladdr,
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003623 &in6addr_linklocal_allrouters);
3624 else
Cong Wangcaf92bc2013-08-31 13:44:32 +08003625 goto put;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003626
Cong Wangcaf92bc2013-08-31 13:44:32 +08003627 write_lock(&idev->lock);
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003628 /* The wait after the last probe can be shorter */
3629 addrconf_mod_rs_timer(idev, (idev->rs_probes ==
3630 idev->cnf.rtr_solicits) ?
3631 idev->cnf.rtr_solicit_delay :
3632 idev->cnf.rtr_solicit_interval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003633 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003634 /*
3635 * Note: we do not support deprecated "all on-link"
3636 * assumption any longer.
3637 */
Joe Perches91df42b2012-05-15 14:11:54 +00003638 pr_debug("%s: no IPv6 routers present\n", idev->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003639 }
3640
3641out:
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003642 write_unlock(&idev->lock);
Cong Wangcaf92bc2013-08-31 13:44:32 +08003643put:
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003644 in6_dev_put(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003645}
3646
3647/*
3648 * Duplicate Address Detection
3649 */
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003650static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
3651{
3652 unsigned long rand_num;
3653 struct inet6_dev *idev = ifp->idev;
3654
Neil Horman95c385b2007-04-25 17:08:10 -07003655 if (ifp->flags & IFA_F_OPTIMISTIC)
3656 rand_num = 0;
3657 else
Aruna-Hewapathirane63862b52014-01-11 07:15:59 -05003658 rand_num = prandom_u32() % (idev->cnf.rtr_solicit_delay ? : 1);
Neil Horman95c385b2007-04-25 17:08:10 -07003659
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003660 ifp->dad_probes = idev->cnf.dad_transmits;
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003661 addrconf_mod_dad_work(ifp, rand_num);
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003662}
3663
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003664static void addrconf_dad_begin(struct inet6_ifaddr *ifp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003665{
3666 struct inet6_dev *idev = ifp->idev;
3667 struct net_device *dev = idev->dev;
subashab@codeaurora.org16186a82016-02-02 02:11:10 +00003668 bool notify = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003669
3670 addrconf_join_solict(dev, &ifp->addr);
3671
Aruna-Hewapathirane63862b52014-01-11 07:15:59 -05003672 prandom_seed((__force u32) ifp->addr.s6_addr32[3]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003673
3674 read_lock_bh(&idev->lock);
Herbert Xu622ccdf2010-05-18 15:56:06 -07003675 spin_lock(&ifp->lock);
Herbert Xue9d3e082010-05-18 15:36:06 -07003676 if (ifp->state == INET6_IFADDR_STATE_DEAD)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003677 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003678
3679 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09003680 idev->cnf.accept_dad < 1 ||
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07003681 !(ifp->flags&IFA_F_TENTATIVE) ||
3682 ifp->flags & IFA_F_NODAD) {
Brian Haleycc411d02009-09-09 14:41:32 +00003683 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED);
stephen hemminger21809fa2010-02-08 19:48:52 +00003684 spin_unlock(&ifp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003685 read_unlock_bh(&idev->lock);
3686
3687 addrconf_dad_completed(ifp);
3688 return;
3689 }
3690
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08003691 if (!(idev->if_flags & IF_READY)) {
stephen hemminger21809fa2010-02-08 19:48:52 +00003692 spin_unlock(&ifp->lock);
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08003693 read_unlock_bh(&idev->lock);
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003694 /*
Masatake YAMATO590a9882009-06-09 10:41:12 +09003695 * If the device is not ready:
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003696 * - keep it tentative if it is a permanent address.
3697 * - otherwise, kill it.
3698 */
3699 in6_ifa_hold(ifp);
Brian Haleycc411d02009-09-09 14:41:32 +00003700 addrconf_dad_stop(ifp, 0);
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08003701 return;
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +09003702 }
Neil Horman95c385b2007-04-25 17:08:10 -07003703
3704 /*
3705 * Optimistic nodes can start receiving
3706 * Frames right away
3707 */
Erik Kline7fd25612014-10-28 18:11:14 +09003708 if (ifp->flags & IFA_F_OPTIMISTIC) {
Neil Horman95c385b2007-04-25 17:08:10 -07003709 ip6_ins_rt(ifp->rt);
Erik Kline7fd25612014-10-28 18:11:14 +09003710 if (ipv6_use_optimistic_addr(idev)) {
3711 /* Because optimistic nodes can use this address,
3712 * notify listeners. If DAD fails, RTM_DELADDR is sent.
3713 */
subashab@codeaurora.org16186a82016-02-02 02:11:10 +00003714 notify = true;
Erik Kline7fd25612014-10-28 18:11:14 +09003715 }
3716 }
Neil Horman95c385b2007-04-25 17:08:10 -07003717
YOSHIFUJI Hideaki6732bad2005-12-27 13:35:15 -08003718 addrconf_dad_kick(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003719out:
Herbert Xu622ccdf2010-05-18 15:56:06 -07003720 spin_unlock(&ifp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003721 read_unlock_bh(&idev->lock);
subashab@codeaurora.org16186a82016-02-02 02:11:10 +00003722 if (notify)
3723 ipv6_ifa_notify(RTM_NEWADDR, ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003724}
3725
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003726static void addrconf_dad_start(struct inet6_ifaddr *ifp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003727{
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003728 bool begin_dad = false;
3729
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01003730 spin_lock_bh(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003731 if (ifp->state != INET6_IFADDR_STATE_DEAD) {
3732 ifp->state = INET6_IFADDR_STATE_PREDAD;
3733 begin_dad = true;
3734 }
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01003735 spin_unlock_bh(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003736
3737 if (begin_dad)
3738 addrconf_mod_dad_work(ifp, 0);
3739}
3740
3741static void addrconf_dad_work(struct work_struct *w)
3742{
3743 struct inet6_ifaddr *ifp = container_of(to_delayed_work(w),
3744 struct inet6_ifaddr,
3745 dad_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003746 struct inet6_dev *idev = ifp->idev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003747 struct in6_addr mcaddr;
3748
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003749 enum {
3750 DAD_PROCESS,
3751 DAD_BEGIN,
3752 DAD_ABORT,
3753 } action = DAD_PROCESS;
3754
3755 rtnl_lock();
3756
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01003757 spin_lock_bh(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003758 if (ifp->state == INET6_IFADDR_STATE_PREDAD) {
3759 action = DAD_BEGIN;
3760 ifp->state = INET6_IFADDR_STATE_DAD;
3761 } else if (ifp->state == INET6_IFADDR_STATE_ERRDAD) {
3762 action = DAD_ABORT;
3763 ifp->state = INET6_IFADDR_STATE_POSTDAD;
3764 }
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +01003765 spin_unlock_bh(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003766
3767 if (action == DAD_BEGIN) {
3768 addrconf_dad_begin(ifp);
3769 goto out;
3770 } else if (action == DAD_ABORT) {
3771 addrconf_dad_stop(ifp, 1);
3772 goto out;
3773 }
3774
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003775 if (!ifp->dad_probes && addrconf_dad_end(ifp))
Herbert Xuf2344a12010-05-18 15:55:27 -07003776 goto out;
3777
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003778 write_lock_bh(&idev->lock);
stephen hemminger122e4512010-03-02 13:32:44 +00003779 if (idev->dead || !(idev->if_flags & IF_READY)) {
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003780 write_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003781 goto out;
3782 }
stephen hemminger21809fa2010-02-08 19:48:52 +00003783
3784 spin_lock(&ifp->lock);
Herbert Xu622ccdf2010-05-18 15:56:06 -07003785 if (ifp->state == INET6_IFADDR_STATE_DEAD) {
3786 spin_unlock(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003787 write_unlock_bh(&idev->lock);
Herbert Xu622ccdf2010-05-18 15:56:06 -07003788 goto out;
3789 }
3790
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003791 if (ifp->dad_probes == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003792 /*
3793 * DAD was successful
3794 */
3795
Brian Haleycc411d02009-09-09 14:41:32 +00003796 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED);
stephen hemminger21809fa2010-02-08 19:48:52 +00003797 spin_unlock(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003798 write_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003799
3800 addrconf_dad_completed(ifp);
3801
3802 goto out;
3803 }
3804
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003805 ifp->dad_probes--;
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003806 addrconf_mod_dad_work(ifp,
3807 NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME));
stephen hemminger21809fa2010-02-08 19:48:52 +00003808 spin_unlock(&ifp->lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003809 write_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003810
3811 /* send a neighbour solicitation for our addr */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003812 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
Nicolas Dichtel304d8882015-11-27 18:17:05 +01003813 ndisc_send_ns(ifp->idev->dev, &ifp->addr, &mcaddr, &in6addr_any);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003814out:
3815 in6_ifa_put(ifp);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003816 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003817}
3818
Hannes Frederic Sowa11ffff72014-01-16 20:13:04 +01003819/* ifp->idev must be at least read locked */
3820static bool ipv6_lonely_lladdr(struct inet6_ifaddr *ifp)
3821{
3822 struct inet6_ifaddr *ifpiter;
3823 struct inet6_dev *idev = ifp->idev;
3824
Hannes Frederic Sowa602582c2014-01-19 21:58:19 +01003825 list_for_each_entry_reverse(ifpiter, &idev->addr_list, if_list) {
3826 if (ifpiter->scope > IFA_LINK)
3827 break;
Hannes Frederic Sowa11ffff72014-01-16 20:13:04 +01003828 if (ifp != ifpiter && ifpiter->scope == IFA_LINK &&
3829 (ifpiter->flags & (IFA_F_PERMANENT|IFA_F_TENTATIVE|
3830 IFA_F_OPTIMISTIC|IFA_F_DADFAILED)) ==
3831 IFA_F_PERMANENT)
3832 return false;
3833 }
3834 return true;
3835}
3836
Linus Torvalds1da177e2005-04-16 15:20:36 -07003837static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
3838{
Stephen Hemmingere21e8462010-03-20 16:09:01 -07003839 struct net_device *dev = ifp->idev->dev;
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003840 struct in6_addr lladdr;
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02003841 bool send_rs, send_mld;
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003842
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01003843 addrconf_del_dad_work(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003844
3845 /*
3846 * Configure the address for reception. Now it is valid.
3847 */
3848
3849 ipv6_ifa_notify(RTM_NEWADDR, ifp);
3850
Tore Anderson026359b2011-08-28 23:47:33 +00003851 /* If added prefix is link local and we are prepared to process
3852 router advertisements, start sending router solicitations.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003853 */
3854
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02003855 read_lock_bh(&ifp->idev->lock);
Hannes Frederic Sowa11ffff72014-01-16 20:13:04 +01003856 send_mld = ifp->scope == IFA_LINK && ipv6_lonely_lladdr(ifp);
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02003857 send_rs = send_mld &&
3858 ipv6_accept_ra(ifp->idev) &&
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02003859 ifp->idev->cnf.rtr_solicits > 0 &&
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02003860 (dev->flags&IFF_LOOPBACK) == 0;
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02003861 read_unlock_bh(&ifp->idev->lock);
3862
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02003863 /* While dad is in progress mld report's source address is in6_addrany.
3864 * Resend with proper ll now.
3865 */
3866 if (send_mld)
3867 ipv6_mc_dad_complete(ifp->idev);
3868
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02003869 if (send_rs) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003870 /*
3871 * If a host as already performed a random delay
3872 * [...] as part of DAD [...] there is no need
3873 * to delay again before sending the first RS
3874 */
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02003875 if (ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE))
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003876 return;
Hannes Frederic Sowa1ec047e2013-06-27 00:06:56 +02003877 ndisc_send_rs(dev, &lladdr, &in6addr_linklocal_allrouters);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003878
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003879 write_lock_bh(&ifp->idev->lock);
3880 spin_lock(&ifp->lock);
3881 ifp->idev->rs_probes = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003882 ifp->idev->if_flags |= IF_RS_SENT;
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +02003883 addrconf_mod_rs_timer(ifp->idev,
3884 ifp->idev->cnf.rtr_solicit_interval);
3885 spin_unlock(&ifp->lock);
3886 write_unlock_bh(&ifp->idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003887 }
3888}
3889
Stephen Hemmingere21e8462010-03-20 16:09:01 -07003890static void addrconf_dad_run(struct inet6_dev *idev)
3891{
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09003892 struct inet6_ifaddr *ifp;
3893
3894 read_lock_bh(&idev->lock);
stephen hemminger502a2ff2010-03-17 20:31:13 +00003895 list_for_each_entry(ifp, &idev->addr_list, if_list) {
stephen hemminger21809fa2010-02-08 19:48:52 +00003896 spin_lock(&ifp->lock);
Herbert Xuf2344a12010-05-18 15:55:27 -07003897 if (ifp->flags & IFA_F_TENTATIVE &&
3898 ifp->state == INET6_IFADDR_STATE_DAD)
3899 addrconf_dad_kick(ifp);
stephen hemminger21809fa2010-02-08 19:48:52 +00003900 spin_unlock(&ifp->lock);
YOSHIFUJI Hideakic5e33bd2005-12-21 22:57:44 +09003901 }
3902 read_unlock_bh(&idev->lock);
3903}
3904
Linus Torvalds1da177e2005-04-16 15:20:36 -07003905#ifdef CONFIG_PROC_FS
3906struct if6_iter_state {
Daniel Lezcano3c400902008-01-10 22:42:49 -08003907 struct seq_net_private p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003908 int bucket;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003909 int offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003910};
3911
Mihai Maruseac1d578302012-01-03 23:31:35 +00003912static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003913{
3914 struct inet6_ifaddr *ifa = NULL;
3915 struct if6_iter_state *state = seq->private;
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +09003916 struct net *net = seq_file_net(seq);
Mihai Maruseac1d578302012-01-03 23:31:35 +00003917 int p = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003918
Mihai Maruseac1d578302012-01-03 23:31:35 +00003919 /* initial bucket if pos is 0 */
3920 if (pos == 0) {
3921 state->bucket = 0;
3922 state->offset = 0;
3923 }
3924
3925 for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
Sasha Levinb67bfe02013-02-27 17:06:00 -08003926 hlist_for_each_entry_rcu_bh(ifa, &inet6_addr_lst[state->bucket],
Mihai Maruseac1d578302012-01-03 23:31:35 +00003927 addr_lst) {
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003928 if (!net_eq(dev_net(ifa->idev->dev), net))
3929 continue;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003930 /* sync with offset */
3931 if (p < state->offset) {
3932 p++;
3933 continue;
3934 }
3935 state->offset++;
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003936 return ifa;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003937 }
3938
3939 /* prepare for next bucket */
3940 state->offset = 0;
3941 p = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003942 }
stephen hemmingerc2e21292010-03-17 20:31:10 +00003943 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003944}
3945
stephen hemmingerc2e21292010-03-17 20:31:10 +00003946static struct inet6_ifaddr *if6_get_next(struct seq_file *seq,
3947 struct inet6_ifaddr *ifa)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003948{
3949 struct if6_iter_state *state = seq->private;
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +09003950 struct net *net = seq_file_net(seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003951
Sasha Levinb67bfe02013-02-27 17:06:00 -08003952 hlist_for_each_entry_continue_rcu_bh(ifa, addr_lst) {
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003953 if (!net_eq(dev_net(ifa->idev->dev), net))
3954 continue;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003955 state->offset++;
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003956 return ifa;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003957 }
stephen hemmingerc2e21292010-03-17 20:31:10 +00003958
3959 while (++state->bucket < IN6_ADDR_HSIZE) {
Mihai Maruseac1d578302012-01-03 23:31:35 +00003960 state->offset = 0;
Sasha Levinb67bfe02013-02-27 17:06:00 -08003961 hlist_for_each_entry_rcu_bh(ifa,
stephen hemmingerc2e21292010-03-17 20:31:10 +00003962 &inet6_addr_lst[state->bucket], addr_lst) {
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003963 if (!net_eq(dev_net(ifa->idev->dev), net))
3964 continue;
Mihai Maruseac1d578302012-01-03 23:31:35 +00003965 state->offset++;
Eric Dumazet9f0d3c22012-10-16 07:37:27 +00003966 return ifa;
Daniel Lezcano3c400902008-01-10 22:42:49 -08003967 }
3968 }
3969
stephen hemmingerc2e21292010-03-17 20:31:10 +00003970 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003971}
3972
Linus Torvalds1da177e2005-04-16 15:20:36 -07003973static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
Eric Dumazet4f70ecc2010-05-03 10:50:14 +00003974 __acquires(rcu_bh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003975{
stephen hemminger5c578ae2010-03-17 20:31:11 +00003976 rcu_read_lock_bh();
Mihai Maruseac1d578302012-01-03 23:31:35 +00003977 return if6_get_first(seq, *pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003978}
3979
3980static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
3981{
3982 struct inet6_ifaddr *ifa;
3983
3984 ifa = if6_get_next(seq, v);
3985 ++*pos;
3986 return ifa;
3987}
3988
3989static void if6_seq_stop(struct seq_file *seq, void *v)
Eric Dumazet4f70ecc2010-05-03 10:50:14 +00003990 __releases(rcu_bh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003991{
stephen hemminger5c578ae2010-03-17 20:31:11 +00003992 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003993}
3994
3995static int if6_seq_show(struct seq_file *seq, void *v)
3996{
3997 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
Jiri Pirko971a3512013-12-10 13:56:29 +01003998 seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n",
Harvey Harrisonb0711952008-10-28 16:05:40 -07003999 &ifp->addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004000 ifp->idev->dev->ifindex,
4001 ifp->prefix_len,
4002 ifp->scope,
Jiri Pirko971a3512013-12-10 13:56:29 +01004003 (u8) ifp->flags,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004004 ifp->idev->dev->name);
4005 return 0;
4006}
4007
Philippe De Muyter56b3d972007-07-10 23:07:31 -07004008static const struct seq_operations if6_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004009 .start = if6_seq_start,
4010 .next = if6_seq_next,
4011 .show = if6_seq_show,
4012 .stop = if6_seq_stop,
4013};
4014
4015static int if6_seq_open(struct inode *inode, struct file *file)
4016{
Daniel Lezcano3c400902008-01-10 22:42:49 -08004017 return seq_open_net(inode, file, &if6_seq_ops,
4018 sizeof(struct if6_iter_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004019}
4020
Arjan van de Ven9a321442007-02-12 00:55:35 -08004021static const struct file_operations if6_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004022 .owner = THIS_MODULE,
4023 .open = if6_seq_open,
4024 .read = seq_read,
4025 .llseek = seq_lseek,
Daniel Lezcano3c400902008-01-10 22:42:49 -08004026 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004027};
4028
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00004029static int __net_init if6_proc_net_init(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004030{
Gao fengd4beaa62013-02-18 01:34:54 +00004031 if (!proc_create("if_inet6", S_IRUGO, net->proc_net, &if6_fops))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004032 return -ENOMEM;
4033 return 0;
4034}
4035
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00004036static void __net_exit if6_proc_net_exit(struct net *net)
Daniel Lezcano3c400902008-01-10 22:42:49 -08004037{
Gao fengece31ff2013-02-18 01:34:56 +00004038 remove_proc_entry("if_inet6", net->proc_net);
Daniel Lezcano3c400902008-01-10 22:42:49 -08004039}
4040
4041static struct pernet_operations if6_proc_net_ops = {
Ian Morris67ba4152014-08-24 21:53:10 +01004042 .init = if6_proc_net_init,
4043 .exit = if6_proc_net_exit,
Daniel Lezcano3c400902008-01-10 22:42:49 -08004044};
4045
4046int __init if6_proc_init(void)
4047{
4048 return register_pernet_subsys(&if6_proc_net_ops);
4049}
4050
Linus Torvalds1da177e2005-04-16 15:20:36 -07004051void if6_proc_exit(void)
4052{
Daniel Lezcano3c400902008-01-10 22:42:49 -08004053 unregister_pernet_subsys(&if6_proc_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004054}
4055#endif /* CONFIG_PROC_FS */
4056
Amerigo Wang07a93622012-10-29 16:23:10 +00004057#if IS_ENABLED(CONFIG_IPV6_MIP6)
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07004058/* Check if address is a home address configured on any interface. */
Eric Dumazetb71d1d42011-04-22 04:53:02 +00004059int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr)
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07004060{
4061 int ret = 0;
stephen hemmingerc2e21292010-03-17 20:31:10 +00004062 struct inet6_ifaddr *ifp = NULL;
Eric Dumazetddbe5032012-07-18 08:11:12 +00004063 unsigned int hash = inet6_addr_hash(addr);
stephen hemmingerc2e21292010-03-17 20:31:10 +00004064
stephen hemminger5c578ae2010-03-17 20:31:11 +00004065 rcu_read_lock_bh();
Sasha Levinb67bfe02013-02-27 17:06:00 -08004066 hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) {
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +09004067 if (!net_eq(dev_net(ifp->idev->dev), net))
Daniel Lezcano389f6612008-01-10 22:44:40 -08004068 continue;
YOSHIFUJI Hideakicaad2952008-04-10 15:42:07 +09004069 if (ipv6_addr_equal(&ifp->addr, addr) &&
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07004070 (ifp->flags & IFA_F_HOMEADDRESS)) {
4071 ret = 1;
4072 break;
4073 }
4074 }
stephen hemminger5c578ae2010-03-17 20:31:11 +00004075 rcu_read_unlock_bh();
Noriaki TAKAMIYA3b9f9a12006-09-22 14:45:56 -07004076 return ret;
4077}
4078#endif
4079
Linus Torvalds1da177e2005-04-16 15:20:36 -07004080/*
4081 * Periodic address status verification
4082 */
4083
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01004084static void addrconf_verify_rtnl(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004085{
YOSHIFUJI Hideakib2db7562010-03-20 16:11:12 -07004086 unsigned long now, next, next_sec, next_sched;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004087 struct inet6_ifaddr *ifp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004088 int i;
4089
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01004090 ASSERT_RTNL();
4091
stephen hemminger5c578ae2010-03-17 20:31:11 +00004092 rcu_read_lock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004093 now = jiffies;
YOSHIFUJI Hideakib2db7562010-03-20 16:11:12 -07004094 next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004095
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01004096 cancel_delayed_work(&addr_chk_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004097
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07004098 for (i = 0; i < IN6_ADDR_HSIZE; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004099restart:
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01004100 hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[i], addr_lst) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004101 unsigned long age;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004102
Yasushi Asanofad8da32013-12-31 12:04:19 +09004103 /* When setting preferred_lft to a value not zero or
4104 * infinity, while valid_lft is infinity
4105 * IFA_F_PERMANENT has a non-infinity life time.
4106 */
4107 if ((ifp->flags & IFA_F_PERMANENT) &&
4108 (ifp->prefered_lft == INFINITY_LIFE_TIME))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004109 continue;
4110
4111 spin_lock(&ifp->lock);
YOSHIFUJI Hideakib2db7562010-03-20 16:11:12 -07004112 /* We try to batch several events at once. */
4113 age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004114
YOSHIFUJI Hideaki8f27ebb2006-07-28 18:12:11 +09004115 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
4116 age >= ifp->valid_lft) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004117 spin_unlock(&ifp->lock);
4118 in6_ifa_hold(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004119 ipv6_del_addr(ifp);
4120 goto restart;
YOSHIFUJI Hideaki8f27ebb2006-07-28 18:12:11 +09004121 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
4122 spin_unlock(&ifp->lock);
4123 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004124 } else if (age >= ifp->prefered_lft) {
Brian Haleya1ed0522009-07-02 07:10:52 +00004125 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004126 int deprecate = 0;
4127
4128 if (!(ifp->flags&IFA_F_DEPRECATED)) {
4129 deprecate = 1;
4130 ifp->flags |= IFA_F_DEPRECATED;
4131 }
4132
Yasushi Asanofad8da32013-12-31 12:04:19 +09004133 if ((ifp->valid_lft != INFINITY_LIFE_TIME) &&
4134 (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004135 next = ifp->tstamp + ifp->valid_lft * HZ;
4136
4137 spin_unlock(&ifp->lock);
4138
4139 if (deprecate) {
4140 in6_ifa_hold(ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004141
4142 ipv6_ifa_notify(0, ifp);
4143 in6_ifa_put(ifp);
4144 goto restart;
4145 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004146 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
4147 !(ifp->flags&IFA_F_TENTATIVE)) {
stephen hemminger88949cf2010-03-17 20:31:17 +00004148 unsigned long regen_advance = ifp->idev->cnf.regen_max_retry *
4149 ifp->idev->cnf.dad_transmits *
Jiri Pirko1f9248e52013-12-07 19:26:53 +01004150 NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME) / HZ;
stephen hemminger88949cf2010-03-17 20:31:17 +00004151
Linus Torvalds1da177e2005-04-16 15:20:36 -07004152 if (age >= ifp->prefered_lft - regen_advance) {
4153 struct inet6_ifaddr *ifpub = ifp->ifpub;
4154 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
4155 next = ifp->tstamp + ifp->prefered_lft * HZ;
4156 if (!ifp->regen_count && ifpub) {
4157 ifp->regen_count++;
4158 in6_ifa_hold(ifp);
4159 in6_ifa_hold(ifpub);
4160 spin_unlock(&ifp->lock);
stephen hemminger5c578ae2010-03-17 20:31:11 +00004161
Hiroyuki YAMAMORI291d8092005-12-23 11:24:05 -08004162 spin_lock(&ifpub->lock);
4163 ifpub->regen_count = 0;
4164 spin_unlock(&ifpub->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004165 ipv6_create_tempaddr(ifpub, ifp);
4166 in6_ifa_put(ifpub);
4167 in6_ifa_put(ifp);
4168 goto restart;
4169 }
4170 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
4171 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
4172 spin_unlock(&ifp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004173 } else {
4174 /* ifp->prefered_lft <= ifp->valid_lft */
4175 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
4176 next = ifp->tstamp + ifp->prefered_lft * HZ;
4177 spin_unlock(&ifp->lock);
4178 }
4179 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004180 }
4181
YOSHIFUJI Hideakib2db7562010-03-20 16:11:12 -07004182 next_sec = round_jiffies_up(next);
4183 next_sched = next;
4184
4185 /* If rounded timeout is accurate enough, accept it. */
4186 if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ))
4187 next_sched = next_sec;
4188
4189 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
4190 if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX))
4191 next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX;
4192
dingtianhongba3542e2013-08-17 10:27:04 +08004193 ADBG(KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
4194 now, next, next_sec, next_sched);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01004195 mod_delayed_work(addrconf_wq, &addr_chk_work, next_sched - now);
stephen hemminger5c578ae2010-03-17 20:31:11 +00004196 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004197}
4198
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01004199static void addrconf_verify_work(struct work_struct *w)
4200{
4201 rtnl_lock();
4202 addrconf_verify_rtnl();
4203 rtnl_unlock();
4204}
4205
4206static void addrconf_verify(void)
4207{
4208 mod_delayed_work(addrconf_wq, &addr_chk_work, 0);
4209}
4210
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004211static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local,
4212 struct in6_addr **peer_pfx)
Thomas Graf461d8832006-09-18 00:09:49 -07004213{
4214 struct in6_addr *pfx = NULL;
4215
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004216 *peer_pfx = NULL;
4217
Thomas Graf461d8832006-09-18 00:09:49 -07004218 if (addr)
4219 pfx = nla_data(addr);
4220
4221 if (local) {
4222 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004223 *peer_pfx = pfx;
4224 pfx = nla_data(local);
Thomas Graf461d8832006-09-18 00:09:49 -07004225 }
4226
4227 return pfx;
4228}
4229
Patrick McHardyef7c79e2007-06-05 12:38:30 -07004230static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
Thomas Graf461d8832006-09-18 00:09:49 -07004231 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
4232 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
4233 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
Jiri Pirko479840f2013-12-06 09:45:21 +01004234 [IFA_FLAGS] = { .len = sizeof(u32) },
Thomas Graf461d8832006-09-18 00:09:49 -07004235};
4236
Linus Torvalds1da177e2005-04-16 15:20:36 -07004237static int
Thomas Graf661d2962013-03-21 07:45:29 +00004238inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004239{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09004240 struct net *net = sock_net(skb->sk);
Thomas Grafb933f712006-09-18 00:10:19 -07004241 struct ifaddrmsg *ifm;
4242 struct nlattr *tb[IFA_MAX+1];
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004243 struct in6_addr *pfx, *peer_pfx;
Heiner Kallweit6046d5b2014-04-20 21:29:36 +02004244 u32 ifa_flags;
Thomas Grafb933f712006-09-18 00:10:19 -07004245 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004246
Thomas Grafb933f712006-09-18 00:10:19 -07004247 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
4248 if (err < 0)
4249 return err;
4250
4251 ifm = nlmsg_data(nlh);
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004252 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx);
Ian Morris63159f22015-03-29 14:00:04 +01004253 if (!pfx)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004254 return -EINVAL;
4255
Heiner Kallweit6046d5b2014-04-20 21:29:36 +02004256 ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags;
4257
4258 /* We ignore other flags so far. */
4259 ifa_flags &= IFA_F_MANAGETEMPADDR;
4260
4261 return inet6_addr_del(net, ifm->ifa_index, ifa_flags, pfx,
4262 ifm->ifa_prefixlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004263}
4264
Jiri Pirko479840f2013-12-06 09:45:21 +01004265static int inet6_addr_modify(struct inet6_ifaddr *ifp, u32 ifa_flags,
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07004266 u32 prefered_lft, u32 valid_lft)
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09004267{
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07004268 u32 flags;
4269 clock_t expires;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09004270 unsigned long timeout;
Jiri Pirko53bd6742013-12-06 09:45:22 +01004271 bool was_managetempaddr;
Thomas Haller5b84efe2014-01-15 15:36:59 +01004272 bool had_prefixroute;
YOSHIFUJI Hideaki46d48042007-02-07 20:36:26 +09004273
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01004274 ASSERT_RTNL();
4275
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09004276 if (!valid_lft || (prefered_lft > valid_lft))
4277 return -EINVAL;
4278
Jiri Pirko53bd6742013-12-06 09:45:22 +01004279 if (ifa_flags & IFA_F_MANAGETEMPADDR &&
4280 (ifp->flags & IFA_F_TEMPORARY || ifp->prefix_len != 64))
4281 return -EINVAL;
4282
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09004283 timeout = addrconf_timeout_fixup(valid_lft, HZ);
4284 if (addrconf_finite_timeout(timeout)) {
4285 expires = jiffies_to_clock_t(timeout * HZ);
4286 valid_lft = timeout;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07004287 flags = RTF_EXPIRES;
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09004288 } else {
4289 expires = 0;
4290 flags = 0;
4291 ifa_flags |= IFA_F_PERMANENT;
YOSHIFUJI Hideaki6f704992008-05-19 16:56:11 -07004292 }
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09004293
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +09004294 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
4295 if (addrconf_finite_timeout(timeout)) {
4296 if (timeout == 0)
4297 ifa_flags |= IFA_F_DEPRECATED;
4298 prefered_lft = timeout;
4299 }
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09004300
4301 spin_lock_bh(&ifp->lock);
Jiri Pirko53bd6742013-12-06 09:45:22 +01004302 was_managetempaddr = ifp->flags & IFA_F_MANAGETEMPADDR;
Thomas Haller5b84efe2014-01-15 15:36:59 +01004303 had_prefixroute = ifp->flags & IFA_F_PERMANENT &&
4304 !(ifp->flags & IFA_F_NOPREFIXROUTE);
Jiri Pirko53bd6742013-12-06 09:45:22 +01004305 ifp->flags &= ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD |
Thomas Haller761aac72014-01-15 15:36:58 +01004306 IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR |
4307 IFA_F_NOPREFIXROUTE);
Jiri Pirko53bd6742013-12-06 09:45:22 +01004308 ifp->flags |= ifa_flags;
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09004309 ifp->tstamp = jiffies;
4310 ifp->valid_lft = valid_lft;
4311 ifp->prefered_lft = prefered_lft;
4312
4313 spin_unlock_bh(&ifp->lock);
4314 if (!(ifp->flags&IFA_F_TENTATIVE))
4315 ipv6_ifa_notify(0, ifp);
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09004316
Thomas Haller761aac72014-01-15 15:36:58 +01004317 if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) {
4318 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
4319 expires, flags);
Thomas Haller5b84efe2014-01-15 15:36:59 +01004320 } else if (had_prefixroute) {
4321 enum cleanup_prefix_rt_t action;
4322 unsigned long rt_expires;
4323
4324 write_lock_bh(&ifp->idev->lock);
4325 action = check_cleanup_prefix_route(ifp, &rt_expires);
4326 write_unlock_bh(&ifp->idev->lock);
4327
4328 if (action != CLEANUP_PREFIX_RT_NOP) {
4329 cleanup_prefix_route(ifp, rt_expires,
4330 action == CLEANUP_PREFIX_RT_DEL);
4331 }
Thomas Haller761aac72014-01-15 15:36:58 +01004332 }
Jiri Pirko53bd6742013-12-06 09:45:22 +01004333
4334 if (was_managetempaddr || ifp->flags & IFA_F_MANAGETEMPADDR) {
4335 if (was_managetempaddr && !(ifp->flags & IFA_F_MANAGETEMPADDR))
4336 valid_lft = prefered_lft = 0;
4337 manage_tempaddrs(ifp->idev, ifp, valid_lft, prefered_lft,
4338 !was_managetempaddr, jiffies);
4339 }
4340
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01004341 addrconf_verify_rtnl();
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09004342
4343 return 0;
4344}
4345
4346static int
Thomas Graf661d2962013-03-21 07:45:29 +00004347inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004348{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09004349 struct net *net = sock_net(skb->sk);
Thomas Graf461d8832006-09-18 00:09:49 -07004350 struct ifaddrmsg *ifm;
4351 struct nlattr *tb[IFA_MAX+1];
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004352 struct in6_addr *pfx, *peer_pfx;
Thomas Graf7198f8c2006-09-18 00:13:46 -07004353 struct inet6_ifaddr *ifa;
4354 struct net_device *dev;
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07004355 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
Jiri Pirko479840f2013-12-06 09:45:21 +01004356 u32 ifa_flags;
Thomas Graf461d8832006-09-18 00:09:49 -07004357 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004358
Thomas Graf461d8832006-09-18 00:09:49 -07004359 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
4360 if (err < 0)
4361 return err;
4362
4363 ifm = nlmsg_data(nlh);
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004364 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx);
Ian Morris63159f22015-03-29 14:00:04 +01004365 if (!pfx)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004366 return -EINVAL;
4367
Thomas Graf461d8832006-09-18 00:09:49 -07004368 if (tb[IFA_CACHEINFO]) {
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09004369 struct ifa_cacheinfo *ci;
Thomas Graf461d8832006-09-18 00:09:49 -07004370
4371 ci = nla_data(tb[IFA_CACHEINFO]);
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09004372 valid_lft = ci->ifa_valid;
Thomas Graf461d8832006-09-18 00:09:49 -07004373 preferred_lft = ci->ifa_prefered;
4374 } else {
4375 preferred_lft = INFINITY_LIFE_TIME;
4376 valid_lft = INFINITY_LIFE_TIME;
Noriaki TAKAMIYA07787692006-07-28 18:12:10 +09004377 }
4378
Daniel Lezcanoaf284932008-03-05 10:46:57 -08004379 dev = __dev_get_by_index(net, ifm->ifa_index);
Ian Morris63159f22015-03-29 14:00:04 +01004380 if (!dev)
Thomas Graf7198f8c2006-09-18 00:13:46 -07004381 return -ENODEV;
4382
Jiri Pirko479840f2013-12-06 09:45:21 +01004383 ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags;
4384
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07004385 /* We ignore other flags so far. */
Thomas Haller761aac72014-01-15 15:36:58 +01004386 ifa_flags &= IFA_F_NODAD | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR |
Madhu Challa93a714d2015-02-25 09:58:35 -08004387 IFA_F_NOPREFIXROUTE | IFA_F_MCAUTOJOIN;
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07004388
Daniel Lezcano1cab3da2008-01-10 22:44:09 -08004389 ifa = ipv6_get_ifaddr(net, pfx, dev, 1);
Ian Morris63159f22015-03-29 14:00:04 +01004390 if (!ifa) {
Thomas Graf7198f8c2006-09-18 00:13:46 -07004391 /*
4392 * It would be best to check for !NLM_F_CREATE here but
stephen hemmingerdb9c7c32014-01-12 11:26:32 -08004393 * userspace already relies on not having to provide this.
Thomas Graf7198f8c2006-09-18 00:13:46 -07004394 */
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004395 return inet6_addr_add(net, ifm->ifa_index, pfx, peer_pfx,
Daniel Lezcanoaf284932008-03-05 10:46:57 -08004396 ifm->ifa_prefixlen, ifa_flags,
4397 preferred_lft, valid_lft);
Noriaki TAKAMIYA081bba52006-07-28 18:12:13 +09004398 }
4399
Thomas Graf7198f8c2006-09-18 00:13:46 -07004400 if (nlh->nlmsg_flags & NLM_F_EXCL ||
4401 !(nlh->nlmsg_flags & NLM_F_REPLACE))
4402 err = -EEXIST;
4403 else
Noriaki TAKAMIYA55ebaef2006-09-22 14:45:27 -07004404 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
Thomas Graf7198f8c2006-09-18 00:13:46 -07004405
4406 in6_ifa_put(ifa);
4407
4408 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004409}
4410
Jiri Pirko479840f2013-12-06 09:45:21 +01004411static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u32 flags,
Thomas Graf101bb222006-09-18 00:11:52 -07004412 u8 scope, int ifindex)
4413{
4414 struct ifaddrmsg *ifm;
4415
4416 ifm = nlmsg_data(nlh);
4417 ifm->ifa_family = AF_INET6;
4418 ifm->ifa_prefixlen = prefixlen;
4419 ifm->ifa_flags = flags;
4420 ifm->ifa_scope = scope;
4421 ifm->ifa_index = ifindex;
4422}
4423
Thomas Graf85486af2006-09-18 00:11:24 -07004424static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
4425 unsigned long tstamp, u32 preferred, u32 valid)
4426{
4427 struct ifa_cacheinfo ci;
4428
Thomas Graf18a31e12010-11-17 04:12:02 +00004429 ci.cstamp = cstamp_delta(cstamp);
4430 ci.tstamp = cstamp_delta(tstamp);
Thomas Graf85486af2006-09-18 00:11:24 -07004431 ci.ifa_prefered = preferred;
4432 ci.ifa_valid = valid;
4433
4434 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
4435}
4436
Thomas Graf101bb222006-09-18 00:11:52 -07004437static inline int rt_scope(int ifa_scope)
4438{
4439 if (ifa_scope & IFA_HOST)
4440 return RT_SCOPE_HOST;
4441 else if (ifa_scope & IFA_LINK)
4442 return RT_SCOPE_LINK;
4443 else if (ifa_scope & IFA_SITE)
4444 return RT_SCOPE_SITE;
4445 else
4446 return RT_SCOPE_UNIVERSE;
4447}
4448
Thomas Graf0ab68032006-09-18 00:12:35 -07004449static inline int inet6_ifaddr_msgsize(void)
4450{
Thomas Graf339bf982006-11-10 14:10:15 -08004451 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004452 + nla_total_size(16) /* IFA_LOCAL */
Thomas Graf339bf982006-11-10 14:10:15 -08004453 + nla_total_size(16) /* IFA_ADDRESS */
Jiri Pirko479840f2013-12-06 09:45:21 +01004454 + nla_total_size(sizeof(struct ifa_cacheinfo))
4455 + nla_total_size(4) /* IFA_FLAGS */;
Thomas Graf0ab68032006-09-18 00:12:35 -07004456}
YOSHIFUJI Hideakic5396a32006-06-17 22:48:48 -07004457
Linus Torvalds1da177e2005-04-16 15:20:36 -07004458static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004459 u32 portid, u32 seq, int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004460{
Linus Torvalds1da177e2005-04-16 15:20:36 -07004461 struct nlmsghdr *nlh;
Thomas Graf85486af2006-09-18 00:11:24 -07004462 u32 preferred, valid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004463
Eric W. Biederman15e47302012-09-07 20:12:54 +00004464 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags);
Ian Morris63159f22015-03-29 14:00:04 +01004465 if (!nlh)
Patrick McHardy26932562007-01-31 23:16:40 -08004466 return -EMSGSIZE;
Thomas Graf0ab68032006-09-18 00:12:35 -07004467
Thomas Graf101bb222006-09-18 00:11:52 -07004468 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
4469 ifa->idev->dev->ifindex);
4470
Yasushi Asanofad8da32013-12-31 12:04:19 +09004471 if (!((ifa->flags&IFA_F_PERMANENT) &&
4472 (ifa->prefered_lft == INFINITY_LIFE_TIME))) {
Thomas Graf85486af2006-09-18 00:11:24 -07004473 preferred = ifa->prefered_lft;
4474 valid = ifa->valid_lft;
4475 if (preferred != INFINITY_LIFE_TIME) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004476 long tval = (jiffies - ifa->tstamp)/HZ;
Jens Rosenbooma1faa692009-06-25 04:55:50 +00004477 if (preferred > tval)
4478 preferred -= tval;
4479 else
4480 preferred = 0;
Ben Hutchingsf56619f2010-06-26 11:37:47 +00004481 if (valid != INFINITY_LIFE_TIME) {
4482 if (valid > tval)
4483 valid -= tval;
4484 else
4485 valid = 0;
4486 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004487 }
4488 } else {
Thomas Graf85486af2006-09-18 00:11:24 -07004489 preferred = INFINITY_LIFE_TIME;
4490 valid = INFINITY_LIFE_TIME;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004491 }
Thomas Graf85486af2006-09-18 00:11:24 -07004492
Cong Wang7996c792013-05-22 05:41:06 +00004493 if (!ipv6_addr_any(&ifa->peer_addr)) {
Jiri Benc930345e2015-03-29 16:59:25 +02004494 if (nla_put_in6_addr(skb, IFA_LOCAL, &ifa->addr) < 0 ||
4495 nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->peer_addr) < 0)
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004496 goto error;
4497 } else
Jiri Benc930345e2015-03-29 16:59:25 +02004498 if (nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->addr) < 0)
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004499 goto error;
4500
4501 if (put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0)
4502 goto error;
Thomas Graf85486af2006-09-18 00:11:24 -07004503
Jiri Pirko479840f2013-12-06 09:45:21 +01004504 if (nla_put_u32(skb, IFA_FLAGS, ifa->flags) < 0)
4505 goto error;
4506
Johannes Berg053c0952015-01-16 22:09:00 +01004507 nlmsg_end(skb, nlh);
4508 return 0;
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004509
4510error:
4511 nlmsg_cancel(skb, nlh);
4512 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004513}
4514
4515static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004516 u32 portid, u32 seq, int event, u16 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004517{
Linus Torvalds1da177e2005-04-16 15:20:36 -07004518 struct nlmsghdr *nlh;
Thomas Graf101bb222006-09-18 00:11:52 -07004519 u8 scope = RT_SCOPE_UNIVERSE;
4520 int ifindex = ifmca->idev->dev->ifindex;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004521
Thomas Graf101bb222006-09-18 00:11:52 -07004522 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
4523 scope = RT_SCOPE_SITE;
4524
Eric W. Biederman15e47302012-09-07 20:12:54 +00004525 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags);
Ian Morris63159f22015-03-29 14:00:04 +01004526 if (!nlh)
Patrick McHardy26932562007-01-31 23:16:40 -08004527 return -EMSGSIZE;
Thomas Graf0ab68032006-09-18 00:12:35 -07004528
Thomas Graf101bb222006-09-18 00:11:52 -07004529 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
Jiri Benc930345e2015-03-29 16:59:25 +02004530 if (nla_put_in6_addr(skb, IFA_MULTICAST, &ifmca->mca_addr) < 0 ||
Thomas Graf0ab68032006-09-18 00:12:35 -07004531 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
Patrick McHardy26932562007-01-31 23:16:40 -08004532 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
4533 nlmsg_cancel(skb, nlh);
4534 return -EMSGSIZE;
4535 }
Thomas Graf85486af2006-09-18 00:11:24 -07004536
Johannes Berg053c0952015-01-16 22:09:00 +01004537 nlmsg_end(skb, nlh);
4538 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004539}
4540
4541static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004542 u32 portid, u32 seq, int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004543{
Linus Torvalds1da177e2005-04-16 15:20:36 -07004544 struct nlmsghdr *nlh;
Thomas Graf101bb222006-09-18 00:11:52 -07004545 u8 scope = RT_SCOPE_UNIVERSE;
4546 int ifindex = ifaca->aca_idev->dev->ifindex;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004547
Thomas Graf101bb222006-09-18 00:11:52 -07004548 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
4549 scope = RT_SCOPE_SITE;
4550
Eric W. Biederman15e47302012-09-07 20:12:54 +00004551 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags);
Ian Morris63159f22015-03-29 14:00:04 +01004552 if (!nlh)
Patrick McHardy26932562007-01-31 23:16:40 -08004553 return -EMSGSIZE;
Thomas Graf0ab68032006-09-18 00:12:35 -07004554
Thomas Graf101bb222006-09-18 00:11:52 -07004555 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
Jiri Benc930345e2015-03-29 16:59:25 +02004556 if (nla_put_in6_addr(skb, IFA_ANYCAST, &ifaca->aca_addr) < 0 ||
Thomas Graf0ab68032006-09-18 00:12:35 -07004557 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
Patrick McHardy26932562007-01-31 23:16:40 -08004558 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
4559 nlmsg_cancel(skb, nlh);
4560 return -EMSGSIZE;
4561 }
Thomas Graf85486af2006-09-18 00:11:24 -07004562
Johannes Berg053c0952015-01-16 22:09:00 +01004563 nlmsg_end(skb, nlh);
4564 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004565}
4566
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004567enum addr_type_t {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004568 UNICAST_ADDR,
4569 MULTICAST_ADDR,
4570 ANYCAST_ADDR,
4571};
4572
Eric Dumazet234b27c2009-11-12 04:11:50 +00004573/* called with rcu_read_lock() */
4574static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb,
4575 struct netlink_callback *cb, enum addr_type_t type,
4576 int s_ip_idx, int *p_ip_idx)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004577{
Linus Torvalds1da177e2005-04-16 15:20:36 -07004578 struct ifmcaddr6 *ifmca;
4579 struct ifacaddr6 *ifaca;
Eric Dumazet234b27c2009-11-12 04:11:50 +00004580 int err = 1;
4581 int ip_idx = *p_ip_idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004582
Eric Dumazet234b27c2009-11-12 04:11:50 +00004583 read_lock_bh(&idev->lock);
4584 switch (type) {
stephen hemminger502a2ff2010-03-17 20:31:13 +00004585 case UNICAST_ADDR: {
4586 struct inet6_ifaddr *ifa;
4587
Eric Dumazet234b27c2009-11-12 04:11:50 +00004588 /* unicast address incl. temp addr */
stephen hemminger502a2ff2010-03-17 20:31:13 +00004589 list_for_each_entry(ifa, &idev->addr_list, if_list) {
4590 if (++ip_idx < s_ip_idx)
Eric Dumazet234b27c2009-11-12 04:11:50 +00004591 continue;
4592 err = inet6_fill_ifaddr(skb, ifa,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004593 NETLINK_CB(cb->skb).portid,
Eric Dumazet234b27c2009-11-12 04:11:50 +00004594 cb->nlh->nlmsg_seq,
4595 RTM_NEWADDR,
4596 NLM_F_MULTI);
Johannes Berg053c0952015-01-16 22:09:00 +01004597 if (err < 0)
Eric Dumazet234b27c2009-11-12 04:11:50 +00004598 break;
Nicolas Dichtel63998ac2013-03-22 06:28:43 +00004599 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004600 }
Eric Dumazet234b27c2009-11-12 04:11:50 +00004601 break;
stephen hemminger502a2ff2010-03-17 20:31:13 +00004602 }
Eric Dumazet234b27c2009-11-12 04:11:50 +00004603 case MULTICAST_ADDR:
4604 /* multicast address */
4605 for (ifmca = idev->mc_list; ifmca;
4606 ifmca = ifmca->next, ip_idx++) {
4607 if (ip_idx < s_ip_idx)
4608 continue;
4609 err = inet6_fill_ifmcaddr(skb, ifmca,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004610 NETLINK_CB(cb->skb).portid,
Eric Dumazet234b27c2009-11-12 04:11:50 +00004611 cb->nlh->nlmsg_seq,
4612 RTM_GETMULTICAST,
4613 NLM_F_MULTI);
Johannes Berg053c0952015-01-16 22:09:00 +01004614 if (err < 0)
Eric Dumazet234b27c2009-11-12 04:11:50 +00004615 break;
4616 }
4617 break;
4618 case ANYCAST_ADDR:
4619 /* anycast address */
4620 for (ifaca = idev->ac_list; ifaca;
4621 ifaca = ifaca->aca_next, ip_idx++) {
4622 if (ip_idx < s_ip_idx)
4623 continue;
4624 err = inet6_fill_ifacaddr(skb, ifaca,
Eric W. Biederman15e47302012-09-07 20:12:54 +00004625 NETLINK_CB(cb->skb).portid,
Eric Dumazet234b27c2009-11-12 04:11:50 +00004626 cb->nlh->nlmsg_seq,
4627 RTM_GETANYCAST,
4628 NLM_F_MULTI);
Johannes Berg053c0952015-01-16 22:09:00 +01004629 if (err < 0)
Eric Dumazet234b27c2009-11-12 04:11:50 +00004630 break;
4631 }
4632 break;
4633 default:
4634 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004635 }
Eric Dumazet234b27c2009-11-12 04:11:50 +00004636 read_unlock_bh(&idev->lock);
4637 *p_ip_idx = ip_idx;
4638 return err;
4639}
4640
4641static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
4642 enum addr_type_t type)
4643{
4644 struct net *net = sock_net(skb->sk);
4645 int h, s_h;
4646 int idx, ip_idx;
4647 int s_idx, s_ip_idx;
4648 struct net_device *dev;
4649 struct inet6_dev *idev;
4650 struct hlist_head *head;
Eric Dumazet234b27c2009-11-12 04:11:50 +00004651
4652 s_h = cb->args[0];
4653 s_idx = idx = cb->args[1];
4654 s_ip_idx = ip_idx = cb->args[2];
4655
4656 rcu_read_lock();
Nicolas Dichtel63998ac2013-03-22 06:28:43 +00004657 cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ net->dev_base_seq;
Eric Dumazet234b27c2009-11-12 04:11:50 +00004658 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4659 idx = 0;
4660 head = &net->dev_index_head[h];
Sasha Levinb67bfe02013-02-27 17:06:00 -08004661 hlist_for_each_entry_rcu(dev, head, index_hlist) {
Eric Dumazet234b27c2009-11-12 04:11:50 +00004662 if (idx < s_idx)
4663 goto cont;
Patrick McHardy4b97efd2010-03-26 20:27:49 -07004664 if (h > s_h || idx > s_idx)
Eric Dumazet234b27c2009-11-12 04:11:50 +00004665 s_ip_idx = 0;
4666 ip_idx = 0;
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004667 idev = __in6_dev_get(dev);
4668 if (!idev)
Eric Dumazet234b27c2009-11-12 04:11:50 +00004669 goto cont;
4670
4671 if (in6_dump_addrs(idev, skb, cb, type,
David S. Miller7b46a642015-01-18 23:36:08 -05004672 s_ip_idx, &ip_idx) < 0)
Eric Dumazet234b27c2009-11-12 04:11:50 +00004673 goto done;
4674cont:
4675 idx++;
4676 }
4677 }
4678done:
4679 rcu_read_unlock();
4680 cb->args[0] = h;
4681 cb->args[1] = idx;
4682 cb->args[2] = ip_idx;
4683
Linus Torvalds1da177e2005-04-16 15:20:36 -07004684 return skb->len;
4685}
4686
4687static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
4688{
4689 enum addr_type_t type = UNICAST_ADDR;
Denis V. Lunevb8542722007-12-01 00:21:31 +11004690
Linus Torvalds1da177e2005-04-16 15:20:36 -07004691 return inet6_dump_addr(skb, cb, type);
4692}
4693
4694static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
4695{
4696 enum addr_type_t type = MULTICAST_ADDR;
Denis V. Lunevb8542722007-12-01 00:21:31 +11004697
Linus Torvalds1da177e2005-04-16 15:20:36 -07004698 return inet6_dump_addr(skb, cb, type);
4699}
4700
4701
4702static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
4703{
4704 enum addr_type_t type = ANYCAST_ADDR;
Denis V. Lunevb8542722007-12-01 00:21:31 +11004705
Linus Torvalds1da177e2005-04-16 15:20:36 -07004706 return inet6_dump_addr(skb, cb, type);
4707}
4708
Thomas Graf661d2962013-03-21 07:45:29 +00004709static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh)
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004710{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09004711 struct net *net = sock_net(in_skb->sk);
Thomas Graf1b29fc22006-09-18 00:10:50 -07004712 struct ifaddrmsg *ifm;
4713 struct nlattr *tb[IFA_MAX+1];
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004714 struct in6_addr *addr = NULL, *peer;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004715 struct net_device *dev = NULL;
4716 struct inet6_ifaddr *ifa;
4717 struct sk_buff *skb;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004718 int err;
4719
Thomas Graf1b29fc22006-09-18 00:10:50 -07004720 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
4721 if (err < 0)
4722 goto errout;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004723
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00004724 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer);
Ian Morris63159f22015-03-29 14:00:04 +01004725 if (!addr) {
Thomas Graf1b29fc22006-09-18 00:10:50 -07004726 err = -EINVAL;
4727 goto errout;
4728 }
4729
4730 ifm = nlmsg_data(nlh);
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004731 if (ifm->ifa_index)
Benjamin Thery6fda7352008-03-05 10:47:47 -08004732 dev = __dev_get_by_index(net, ifm->ifa_index);
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004733
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004734 ifa = ipv6_get_ifaddr(net, addr, dev, 1);
4735 if (!ifa) {
Thomas Graf1b29fc22006-09-18 00:10:50 -07004736 err = -EADDRNOTAVAIL;
4737 goto errout;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004738 }
4739
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004740 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL);
4741 if (!skb) {
Thomas Graf1b29fc22006-09-18 00:10:50 -07004742 err = -ENOBUFS;
4743 goto errout_ifa;
4744 }
4745
Eric W. Biederman15e47302012-09-07 20:12:54 +00004746 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).portid,
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004747 nlh->nlmsg_seq, RTM_NEWADDR, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08004748 if (err < 0) {
4749 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4750 WARN_ON(err == -EMSGSIZE);
4751 kfree_skb(skb);
4752 goto errout_ifa;
4753 }
Eric W. Biederman15e47302012-09-07 20:12:54 +00004754 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
Thomas Graf1b29fc22006-09-18 00:10:50 -07004755errout_ifa:
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004756 in6_ifa_put(ifa);
Thomas Graf1b29fc22006-09-18 00:10:50 -07004757errout:
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004758 return err;
Noriaki TAKAMIYA6c223822006-07-28 18:12:12 +09004759}
4760
Linus Torvalds1da177e2005-04-16 15:20:36 -07004761static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
4762{
4763 struct sk_buff *skb;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09004764 struct net *net = dev_net(ifa->idev->dev);
Thomas Graf5d620262006-08-15 00:35:02 -07004765 int err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004766
Thomas Graf0ab68032006-09-18 00:12:35 -07004767 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
Ian Morris63159f22015-03-29 14:00:04 +01004768 if (!skb)
Thomas Graf5d620262006-08-15 00:35:02 -07004769 goto errout;
4770
4771 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08004772 if (err < 0) {
4773 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4774 WARN_ON(err == -EMSGSIZE);
4775 kfree_skb(skb);
4776 goto errout;
4777 }
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -08004778 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
4779 return;
Thomas Graf5d620262006-08-15 00:35:02 -07004780errout:
4781 if (err < 0)
Benjamin Thery6fda7352008-03-05 10:47:47 -08004782 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004783}
4784
Dave Jonesb6f99a22007-03-22 12:27:49 -07004785static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004786 __s32 *array, int bytes)
4787{
Thomas Graf04561c12006-11-14 19:53:58 -08004788 BUG_ON(bytes < (DEVCONF_MAX * 4));
4789
Linus Torvalds1da177e2005-04-16 15:20:36 -07004790 memset(array, 0, bytes);
4791 array[DEVCONF_FORWARDING] = cnf->forwarding;
4792 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
4793 array[DEVCONF_MTU6] = cnf->mtu6;
4794 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
4795 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
4796 array[DEVCONF_AUTOCONF] = cnf->autoconf;
4797 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
4798 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
Thomas Graf93908d12010-11-17 01:44:24 +00004799 array[DEVCONF_RTR_SOLICIT_INTERVAL] =
4800 jiffies_to_msecs(cnf->rtr_solicit_interval);
4801 array[DEVCONF_RTR_SOLICIT_DELAY] =
4802 jiffies_to_msecs(cnf->rtr_solicit_delay);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004803 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
Hannes Frederic Sowafc4eba52013-08-14 01:03:46 +02004804 array[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL] =
4805 jiffies_to_msecs(cnf->mldv1_unsolicited_report_interval);
4806 array[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL] =
4807 jiffies_to_msecs(cnf->mldv2_unsolicited_report_interval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004808 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
4809 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
4810 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
4811 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
4812 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004813 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -08004814 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
Hangbin Liu8013d1d2015-07-30 14:28:42 +08004815 array[DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT] = cnf->accept_ra_min_hop_limit;
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -08004816 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08004817#ifdef CONFIG_IPV6_ROUTER_PREF
4818 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
Thomas Graf93908d12010-11-17 01:44:24 +00004819 array[DEVCONF_RTR_PROBE_INTERVAL] =
4820 jiffies_to_msecs(cnf->rtr_probe_interval);
Neil Hormanfa03ef32007-01-30 14:30:10 -08004821#ifdef CONFIG_IPV6_ROUTE_INFO
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -08004822 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
4823#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08004824#endif
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -07004825 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -07004826 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
Neil Horman95c385b2007-04-25 17:08:10 -07004827#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4828 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
Erik Kline7fd25612014-10-28 18:11:14 +09004829 array[DEVCONF_USE_OPTIMISTIC] = cnf->use_optimistic;
Neil Horman95c385b2007-04-25 17:08:10 -07004830#endif
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09004831#ifdef CONFIG_IPV6_MROUTE
4832 array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding;
4833#endif
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +09004834 array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6;
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09004835 array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad;
Cosmin Ratiuc3faca02009-10-09 03:11:14 +00004836 array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao;
Hannes Frederic Sowa5cb04432012-11-06 16:46:20 +00004837 array[DEVCONF_NDISC_NOTIFY] = cnf->ndisc_notify;
Hannes Frederic Sowab800c3b2013-08-27 01:36:51 +02004838 array[DEVCONF_SUPPRESS_FRAG_NDISC] = cnf->suppress_frag_ndisc;
Ben Greeard9333192014-06-25 14:44:53 -07004839 array[DEVCONF_ACCEPT_RA_FROM_LOCAL] = cnf->accept_ra_from_local;
Harout Hedeshianc2943f12015-01-20 10:06:05 -07004840 array[DEVCONF_ACCEPT_RA_MTU] = cnf->accept_ra_mtu;
Andy Gospodarek35103d12015-08-13 10:39:01 -04004841 array[DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN] = cnf->ignore_routes_with_linkdown;
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +01004842 /* we omit DEVCONF_STABLE_SECRET for now */
Erik Kline3985e8a2015-07-22 16:38:25 +09004843 array[DEVCONF_USE_OIF_ADDRS_ONLY] = cnf->use_oif_addrs_only;
Johannes Bergabbc3042016-02-04 13:31:19 +01004844 array[DEVCONF_DROP_UNICAST_IN_L2_MULTICAST] = cnf->drop_unicast_in_l2_multicast;
Johannes Berg7a02bf82016-02-04 13:31:20 +01004845 array[DEVCONF_DROP_UNSOLICITED_NA] = cnf->drop_unsolicited_na;
David Ahernf1705ec2016-02-24 09:25:37 -08004846 array[DEVCONF_KEEP_ADDR_ON_DOWN] = cnf->keep_addr_on_down;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004847}
4848
Thomas Grafb382b192010-11-16 04:33:57 +00004849static inline size_t inet6_ifla6_size(void)
4850{
4851 return nla_total_size(4) /* IFLA_INET6_FLAGS */
4852 + nla_total_size(sizeof(struct ifla_cacheinfo))
4853 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
4854 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004855 + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
4856 + nla_total_size(sizeof(struct in6_addr)); /* IFLA_INET6_TOKEN */
Thomas Grafb382b192010-11-16 04:33:57 +00004857}
4858
Thomas Graf339bf982006-11-10 14:10:15 -08004859static inline size_t inet6_if_nlmsg_size(void)
4860{
4861 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
4862 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
4863 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
4864 + nla_total_size(4) /* IFLA_MTU */
4865 + nla_total_size(4) /* IFLA_LINK */
Andy Gospodarek03443382015-08-13 15:26:35 -04004866 + nla_total_size(1) /* IFLA_OPERSTATE */
Thomas Grafb382b192010-11-16 04:33:57 +00004867 + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
Thomas Graf339bf982006-11-10 14:10:15 -08004868}
YOSHIFUJI Hideakic5396a32006-06-17 22:48:48 -07004869
Eric Dumazetbe281e52011-05-19 01:14:23 +00004870static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib,
Tejun Heo7d720c32010-02-16 15:20:26 +00004871 int items, int bytes)
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004872{
4873 int i;
4874 int pad = bytes - sizeof(u64) * items;
4875 BUG_ON(pad < 0);
4876
4877 /* Use put_unaligned() because stats may not be aligned for u64. */
4878 put_unaligned(items, &stats[0]);
4879 for (i = 1; i < items; i++)
Eric Dumazetbe281e52011-05-19 01:14:23 +00004880 put_unaligned(atomic_long_read(&mib[i]), &stats[i]);
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004881
4882 memset(&stats[items], 0, pad);
4883}
4884
WANG Cong698365f2014-05-05 15:55:55 -07004885static inline void __snmp6_fill_stats64(u64 *stats, void __percpu *mib,
Raghavendra K Ta3a77372015-08-30 11:29:42 +05304886 int bytes, size_t syncpoff)
Eric Dumazet4ce3c182010-06-30 13:31:19 -07004887{
Raghavendra K Ta3a77372015-08-30 11:29:42 +05304888 int i, c;
4889 u64 buff[IPSTATS_MIB_MAX];
4890 int pad = bytes - sizeof(u64) * IPSTATS_MIB_MAX;
4891
Eric Dumazet4ce3c182010-06-30 13:31:19 -07004892 BUG_ON(pad < 0);
4893
Raghavendra K Ta3a77372015-08-30 11:29:42 +05304894 memset(buff, 0, sizeof(buff));
4895 buff[0] = IPSTATS_MIB_MAX;
Eric Dumazet4ce3c182010-06-30 13:31:19 -07004896
Raghavendra K Ta3a77372015-08-30 11:29:42 +05304897 for_each_possible_cpu(c) {
4898 for (i = 1; i < IPSTATS_MIB_MAX; i++)
4899 buff[i] += snmp_get_cpu_field64(mib, c, i, syncpoff);
4900 }
4901
4902 memcpy(stats, buff, IPSTATS_MIB_MAX * sizeof(u64));
4903 memset(&stats[IPSTATS_MIB_MAX], 0, pad);
Eric Dumazet4ce3c182010-06-30 13:31:19 -07004904}
4905
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004906static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
4907 int bytes)
4908{
Stephen Hemmingere21e8462010-03-20 16:09:01 -07004909 switch (attrtype) {
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004910 case IFLA_INET6_STATS:
Raghavendra K Ta3a77372015-08-30 11:29:42 +05304911 __snmp6_fill_stats64(stats, idev->stats.ipv6, bytes,
4912 offsetof(struct ipstats_mib, syncp));
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004913 break;
4914 case IFLA_INET6_ICMP6STATS:
Eric Dumazetbe281e52011-05-19 01:14:23 +00004915 __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, ICMP6_MIB_MAX, bytes);
Herbert Xu7f7d9a62007-04-24 21:54:09 -07004916 break;
4917 }
4918}
4919
Sowmini Varadhand5566fd2015-09-11 16:48:48 -04004920static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev,
4921 u32 ext_filter_mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004922{
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07004923 struct nlattr *nla;
Thomas Graf04561c12006-11-14 19:53:58 -08004924 struct ifla_cacheinfo ci;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004925
David S. Millerc78679e2012-04-01 20:27:33 -04004926 if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags))
4927 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004928 ci.max_reasm_len = IPV6_MAXPLEN;
David S. Miller24912422010-11-19 13:13:47 -08004929 ci.tstamp = cstamp_delta(idev->tstamp);
4930 ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time);
Jiri Pirko1f9248e52013-12-07 19:26:53 +01004931 ci.retrans_time = jiffies_to_msecs(NEIGH_VAR(idev->nd_parms, RETRANS_TIME));
David S. Millerc78679e2012-04-01 20:27:33 -04004932 if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci))
4933 goto nla_put_failure;
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07004934 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
Ian Morris63159f22015-03-29 14:00:04 +01004935 if (!nla)
Thomas Graf04561c12006-11-14 19:53:58 -08004936 goto nla_put_failure;
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07004937 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004938
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07004939 /* XXX - MC not implemented */
4940
Sowmini Varadhand5566fd2015-09-11 16:48:48 -04004941 if (ext_filter_mask & RTEXT_FILTER_SKIP_STATS)
4942 return 0;
4943
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07004944 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
Ian Morris63159f22015-03-29 14:00:04 +01004945 if (!nla)
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07004946 goto nla_put_failure;
4947 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
4948
4949 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
Ian Morris63159f22015-03-29 14:00:04 +01004950 if (!nla)
YOSHIFUJI Hideakibf99f1b2007-04-20 15:56:20 -07004951 goto nla_put_failure;
4952 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004953
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004954 nla = nla_reserve(skb, IFLA_INET6_TOKEN, sizeof(struct in6_addr));
Ian Morris63159f22015-03-29 14:00:04 +01004955 if (!nla)
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004956 goto nla_put_failure;
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02004957
4958 if (nla_put_u8(skb, IFLA_INET6_ADDR_GEN_MODE, idev->addr_gen_mode))
4959 goto nla_put_failure;
4960
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004961 read_lock_bh(&idev->lock);
4962 memcpy(nla_data(nla), idev->token.s6_addr, nla_len(nla));
4963 read_unlock_bh(&idev->lock);
4964
Thomas Grafb382b192010-11-16 04:33:57 +00004965 return 0;
4966
4967nla_put_failure:
4968 return -EMSGSIZE;
4969}
4970
Arad, Ronenb1974ed2015-10-19 09:23:28 -07004971static size_t inet6_get_link_af_size(const struct net_device *dev,
4972 u32 ext_filter_mask)
Thomas Grafb382b192010-11-16 04:33:57 +00004973{
4974 if (!__in6_dev_get(dev))
4975 return 0;
4976
4977 return inet6_ifla6_size();
4978}
4979
Sowmini Varadhand5566fd2015-09-11 16:48:48 -04004980static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev,
4981 u32 ext_filter_mask)
Thomas Grafb382b192010-11-16 04:33:57 +00004982{
4983 struct inet6_dev *idev = __in6_dev_get(dev);
4984
4985 if (!idev)
4986 return -ENODATA;
4987
Sowmini Varadhand5566fd2015-09-11 16:48:48 -04004988 if (inet6_fill_ifla6_attrs(skb, idev, ext_filter_mask) < 0)
Thomas Grafb382b192010-11-16 04:33:57 +00004989 return -EMSGSIZE;
4990
4991 return 0;
4992}
4993
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004994static int inet6_set_iftoken(struct inet6_dev *idev, struct in6_addr *token)
4995{
Daniel Borkmannf53adae2013-04-08 04:01:30 +00004996 struct inet6_ifaddr *ifp;
4997 struct net_device *dev = idev->dev;
Daniel Borkmannfc403832013-04-09 03:47:15 +00004998 bool update_rs = false;
Hannes Frederic Sowadc848292013-06-24 21:42:40 +02004999 struct in6_addr ll_addr;
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005000
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01005001 ASSERT_RTNL();
5002
Ian Morris63159f22015-03-29 14:00:04 +01005003 if (!token)
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005004 return -EINVAL;
5005 if (ipv6_addr_any(token))
5006 return -EINVAL;
5007 if (dev->flags & (IFF_LOOPBACK | IFF_NOARP))
5008 return -EINVAL;
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005009 if (!ipv6_accept_ra(idev))
5010 return -EINVAL;
5011 if (idev->cnf.rtr_solicits <= 0)
5012 return -EINVAL;
5013
5014 write_lock_bh(&idev->lock);
5015
5016 BUILD_BUG_ON(sizeof(token->s6_addr) != 16);
5017 memcpy(idev->token.s6_addr + 8, token->s6_addr + 8, 8);
5018
5019 write_unlock_bh(&idev->lock);
5020
Hannes Frederic Sowadc848292013-06-24 21:42:40 +02005021 if (!idev->dead && (idev->if_flags & IF_READY) &&
5022 !ipv6_get_lladdr(dev, &ll_addr, IFA_F_TENTATIVE |
5023 IFA_F_OPTIMISTIC)) {
Daniel Borkmannfc403832013-04-09 03:47:15 +00005024
5025 /* If we're not ready, then normal ifup will take care
5026 * of this. Otherwise, we need to request our rs here.
5027 */
5028 ndisc_send_rs(dev, &ll_addr, &in6addr_linklocal_allrouters);
5029 update_rs = true;
5030 }
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005031
5032 write_lock_bh(&idev->lock);
Daniel Borkmannfc403832013-04-09 03:47:15 +00005033
Hannes Frederic Sowa77ecaac2013-06-26 03:41:49 +02005034 if (update_rs) {
Daniel Borkmannfc403832013-04-09 03:47:15 +00005035 idev->if_flags |= IF_RS_SENT;
Hannes Frederic Sowa77ecaac2013-06-26 03:41:49 +02005036 idev->rs_probes = 1;
5037 addrconf_mod_rs_timer(idev, idev->cnf.rtr_solicit_interval);
5038 }
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005039
5040 /* Well, that's kinda nasty ... */
5041 list_for_each_entry(ifp, &idev->addr_list, if_list) {
5042 spin_lock(&ifp->lock);
Daniel Borkmann617fe292013-04-09 03:47:16 +00005043 if (ifp->tokenized) {
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005044 ifp->valid_lft = 0;
5045 ifp->prefered_lft = 0;
5046 }
5047 spin_unlock(&ifp->lock);
5048 }
5049
5050 write_unlock_bh(&idev->lock);
Lubomir Rintelb2ed64a2014-10-27 17:39:16 +01005051 inet6_ifinfo_notify(RTM_NEWLINK, idev);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01005052 addrconf_verify_rtnl();
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005053 return 0;
5054}
5055
Daniel Borkmann11b1f822015-02-05 14:39:11 +01005056static const struct nla_policy inet6_af_policy[IFLA_INET6_MAX + 1] = {
5057 [IFLA_INET6_ADDR_GEN_MODE] = { .type = NLA_U8 },
5058 [IFLA_INET6_TOKEN] = { .len = sizeof(struct in6_addr) },
5059};
5060
5061static int inet6_validate_link_af(const struct net_device *dev,
5062 const struct nlattr *nla)
5063{
5064 struct nlattr *tb[IFLA_INET6_MAX + 1];
5065
5066 if (dev && !__in6_dev_get(dev))
5067 return -EAFNOSUPPORT;
5068
5069 return nla_parse_nested(tb, IFLA_INET6_MAX, nla, inet6_af_policy);
5070}
5071
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005072static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla)
5073{
5074 int err = -EINVAL;
5075 struct inet6_dev *idev = __in6_dev_get(dev);
5076 struct nlattr *tb[IFLA_INET6_MAX + 1];
5077
5078 if (!idev)
5079 return -EAFNOSUPPORT;
5080
5081 if (nla_parse_nested(tb, IFLA_INET6_MAX, nla, NULL) < 0)
5082 BUG();
5083
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02005084 if (tb[IFLA_INET6_TOKEN]) {
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005085 err = inet6_set_iftoken(idev, nla_data(tb[IFLA_INET6_TOKEN]));
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02005086 if (err)
5087 return err;
5088 }
5089
5090 if (tb[IFLA_INET6_ADDR_GEN_MODE]) {
5091 u8 mode = nla_get_u8(tb[IFLA_INET6_ADDR_GEN_MODE]);
5092
5093 if (mode != IN6_ADDR_GEN_MODE_EUI64 &&
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01005094 mode != IN6_ADDR_GEN_MODE_NONE &&
Bjørn Morkcc9da6c2015-12-16 16:44:38 +01005095 mode != IN6_ADDR_GEN_MODE_STABLE_PRIVACY &&
5096 mode != IN6_ADDR_GEN_MODE_RANDOM)
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02005097 return -EINVAL;
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01005098
5099 if (mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY &&
5100 !idev->cnf.stable_secret.initialized &&
5101 !dev_net(dev)->ipv6.devconf_dflt->stable_secret.initialized)
5102 return -EINVAL;
5103
Jiri Pirkobc91b0f2014-07-11 21:10:18 +02005104 idev->addr_gen_mode = mode;
5105 err = 0;
5106 }
Daniel Borkmannf53adae2013-04-08 04:01:30 +00005107
5108 return err;
5109}
5110
Thomas Grafb382b192010-11-16 04:33:57 +00005111static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
Eric W. Biederman15e47302012-09-07 20:12:54 +00005112 u32 portid, u32 seq, int event, unsigned int flags)
Thomas Grafb382b192010-11-16 04:33:57 +00005113{
5114 struct net_device *dev = idev->dev;
5115 struct ifinfomsg *hdr;
5116 struct nlmsghdr *nlh;
5117 void *protoinfo;
5118
Eric W. Biederman15e47302012-09-07 20:12:54 +00005119 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*hdr), flags);
Ian Morris63159f22015-03-29 14:00:04 +01005120 if (!nlh)
Thomas Grafb382b192010-11-16 04:33:57 +00005121 return -EMSGSIZE;
5122
5123 hdr = nlmsg_data(nlh);
5124 hdr->ifi_family = AF_INET6;
5125 hdr->__ifi_pad = 0;
5126 hdr->ifi_type = dev->type;
5127 hdr->ifi_index = dev->ifindex;
5128 hdr->ifi_flags = dev_get_flags(dev);
5129 hdr->ifi_change = 0;
5130
David S. Millerc78679e2012-04-01 20:27:33 -04005131 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
5132 (dev->addr_len &&
5133 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
5134 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
Nicolas Dichtela54acb32015-04-02 17:07:00 +02005135 (dev->ifindex != dev_get_iflink(dev) &&
Andy Gospodarek03443382015-08-13 15:26:35 -04005136 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
5137 nla_put_u8(skb, IFLA_OPERSTATE,
5138 netif_running(dev) ? dev->operstate : IF_OPER_DOWN))
David S. Millerc78679e2012-04-01 20:27:33 -04005139 goto nla_put_failure;
Thomas Grafb382b192010-11-16 04:33:57 +00005140 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
Ian Morris63159f22015-03-29 14:00:04 +01005141 if (!protoinfo)
Thomas Grafb382b192010-11-16 04:33:57 +00005142 goto nla_put_failure;
5143
Sowmini Varadhand5566fd2015-09-11 16:48:48 -04005144 if (inet6_fill_ifla6_attrs(skb, idev, 0) < 0)
Thomas Grafb382b192010-11-16 04:33:57 +00005145 goto nla_put_failure;
5146
Thomas Graf04561c12006-11-14 19:53:58 -08005147 nla_nest_end(skb, protoinfo);
Johannes Berg053c0952015-01-16 22:09:00 +01005148 nlmsg_end(skb, nlh);
5149 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005150
Thomas Graf04561c12006-11-14 19:53:58 -08005151nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -08005152 nlmsg_cancel(skb, nlh);
5153 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005154}
5155
5156static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
5157{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09005158 struct net *net = sock_net(skb->sk);
Eric Dumazet84d26972009-11-09 12:11:28 +00005159 int h, s_h;
David S. Miller434a8a582009-11-11 18:53:00 -08005160 int idx = 0, s_idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005161 struct net_device *dev;
5162 struct inet6_dev *idev;
Eric Dumazet84d26972009-11-09 12:11:28 +00005163 struct hlist_head *head;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005164
Eric Dumazet84d26972009-11-09 12:11:28 +00005165 s_h = cb->args[0];
5166 s_idx = cb->args[1];
5167
5168 rcu_read_lock();
5169 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
5170 idx = 0;
5171 head = &net->dev_index_head[h];
Sasha Levinb67bfe02013-02-27 17:06:00 -08005172 hlist_for_each_entry_rcu(dev, head, index_hlist) {
Eric Dumazet84d26972009-11-09 12:11:28 +00005173 if (idx < s_idx)
5174 goto cont;
5175 idev = __in6_dev_get(dev);
5176 if (!idev)
5177 goto cont;
5178 if (inet6_fill_ifinfo(skb, idev,
Eric W. Biederman15e47302012-09-07 20:12:54 +00005179 NETLINK_CB(cb->skb).portid,
Eric Dumazet84d26972009-11-09 12:11:28 +00005180 cb->nlh->nlmsg_seq,
Johannes Berg053c0952015-01-16 22:09:00 +01005181 RTM_NEWLINK, NLM_F_MULTI) < 0)
Eric Dumazet84d26972009-11-09 12:11:28 +00005182 goto out;
Pavel Emelianov7562f872007-05-03 15:13:45 -07005183cont:
Eric Dumazet84d26972009-11-09 12:11:28 +00005184 idx++;
5185 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005186 }
Eric Dumazet84d26972009-11-09 12:11:28 +00005187out:
5188 rcu_read_unlock();
5189 cb->args[1] = idx;
5190 cb->args[0] = h;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005191
5192 return skb->len;
5193}
5194
5195void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
5196{
5197 struct sk_buff *skb;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09005198 struct net *net = dev_net(idev->dev);
Thomas Graf8d7a76c2006-08-15 00:35:47 -07005199 int err = -ENOBUFS;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09005200
Thomas Graf339bf982006-11-10 14:10:15 -08005201 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
Ian Morris63159f22015-03-29 14:00:04 +01005202 if (!skb)
Thomas Graf8d7a76c2006-08-15 00:35:47 -07005203 goto errout;
5204
5205 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08005206 if (err < 0) {
5207 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
5208 WARN_ON(err == -EMSGSIZE);
5209 kfree_skb(skb);
5210 goto errout;
5211 }
Nicolas Dichtel5f75a102010-12-07 23:38:31 +00005212 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC);
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -08005213 return;
Thomas Graf8d7a76c2006-08-15 00:35:47 -07005214errout:
5215 if (err < 0)
Nicolas Dichtel5f75a102010-12-07 23:38:31 +00005216 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005217}
5218
Thomas Graf339bf982006-11-10 14:10:15 -08005219static inline size_t inet6_prefix_nlmsg_size(void)
5220{
5221 return NLMSG_ALIGN(sizeof(struct prefixmsg))
5222 + nla_total_size(sizeof(struct in6_addr))
5223 + nla_total_size(sizeof(struct prefix_cacheinfo));
5224}
YOSHIFUJI Hideakic5396a32006-06-17 22:48:48 -07005225
Linus Torvalds1da177e2005-04-16 15:20:36 -07005226static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
Eric W. Biederman15e47302012-09-07 20:12:54 +00005227 struct prefix_info *pinfo, u32 portid, u32 seq,
Thomas Graf6051e2f2006-11-14 19:54:19 -08005228 int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005229{
Thomas Graf6051e2f2006-11-14 19:54:19 -08005230 struct prefixmsg *pmsg;
5231 struct nlmsghdr *nlh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005232 struct prefix_cacheinfo ci;
5233
Eric W. Biederman15e47302012-09-07 20:12:54 +00005234 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*pmsg), flags);
Ian Morris63159f22015-03-29 14:00:04 +01005235 if (!nlh)
Patrick McHardy26932562007-01-31 23:16:40 -08005236 return -EMSGSIZE;
Thomas Graf6051e2f2006-11-14 19:54:19 -08005237
5238 pmsg = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005239 pmsg->prefix_family = AF_INET6;
Patrick McHardy8a470772005-06-28 12:56:45 -07005240 pmsg->prefix_pad1 = 0;
5241 pmsg->prefix_pad2 = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005242 pmsg->prefix_ifindex = idev->dev->ifindex;
5243 pmsg->prefix_len = pinfo->prefix_len;
5244 pmsg->prefix_type = pinfo->type;
Patrick McHardy8a470772005-06-28 12:56:45 -07005245 pmsg->prefix_pad3 = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005246 pmsg->prefix_flags = 0;
5247 if (pinfo->onlink)
5248 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
5249 if (pinfo->autoconf)
5250 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
5251
David S. Millerc78679e2012-04-01 20:27:33 -04005252 if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix))
5253 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005254 ci.preferred_time = ntohl(pinfo->prefered);
5255 ci.valid_time = ntohl(pinfo->valid);
David S. Millerc78679e2012-04-01 20:27:33 -04005256 if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci))
5257 goto nla_put_failure;
Johannes Berg053c0952015-01-16 22:09:00 +01005258 nlmsg_end(skb, nlh);
5259 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005260
Thomas Graf6051e2f2006-11-14 19:54:19 -08005261nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -08005262 nlmsg_cancel(skb, nlh);
5263 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005264}
5265
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09005266static void inet6_prefix_notify(int event, struct inet6_dev *idev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005267 struct prefix_info *pinfo)
5268{
5269 struct sk_buff *skb;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09005270 struct net *net = dev_net(idev->dev);
Thomas Graf8c384bfa2006-08-15 00:36:07 -07005271 int err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005272
Thomas Graf339bf982006-11-10 14:10:15 -08005273 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
Ian Morris63159f22015-03-29 14:00:04 +01005274 if (!skb)
Thomas Graf8c384bfa2006-08-15 00:36:07 -07005275 goto errout;
5276
5277 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08005278 if (err < 0) {
5279 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
5280 WARN_ON(err == -EMSGSIZE);
5281 kfree_skb(skb);
5282 goto errout;
5283 }
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -08005284 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
5285 return;
Thomas Graf8c384bfa2006-08-15 00:36:07 -07005286errout:
5287 if (err < 0)
Benjamin Thery6fda7352008-03-05 10:47:47 -08005288 rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005289}
5290
Linus Torvalds1da177e2005-04-16 15:20:36 -07005291static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
5292{
Nicolas Dichtel63998ac2013-03-22 06:28:43 +00005293 struct net *net = dev_net(ifp->idev->dev);
5294
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01005295 if (event)
5296 ASSERT_RTNL();
5297
Linus Torvalds1da177e2005-04-16 15:20:36 -07005298 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
5299
5300 switch (event) {
5301 case RTM_NEWADDR:
Neil Horman95c385b2007-04-25 17:08:10 -07005302 /*
5303 * If the address was optimistic
5304 * we inserted the route at the start of
5305 * our DAD process, so we don't need
5306 * to do it again
5307 */
5308 if (!(ifp->rt->rt6i_node))
5309 ip6_ins_rt(ifp->rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005310 if (ifp->idev->cnf.forwarding)
5311 addrconf_join_anycast(ifp);
Cong Wang7996c792013-05-22 05:41:06 +00005312 if (!ipv6_addr_any(&ifp->peer_addr))
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00005313 addrconf_prefix_route(&ifp->peer_addr, 128,
5314 ifp->idev->dev, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005315 break;
5316 case RTM_DELADDR:
5317 if (ifp->idev->cnf.forwarding)
5318 addrconf_leave_anycast(ifp);
5319 addrconf_leave_solict(ifp->idev, &ifp->addr);
Cong Wang7996c792013-05-22 05:41:06 +00005320 if (!ipv6_addr_any(&ifp->peer_addr)) {
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00005321 struct rt6_info *rt;
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00005322
Nicolas Dichtele7478df2014-09-03 23:59:22 +02005323 rt = addrconf_get_prefix_route(&ifp->peer_addr, 128,
5324 ifp->idev->dev, 0, 0);
Martin KaFai Lau8e3d5be2015-09-15 14:30:08 -07005325 if (rt)
5326 ip6_del_rt(rt);
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +00005327 }
David Ahern799977d2016-03-02 11:30:07 -08005328 dst_hold(&ifp->rt->dst);
stephen hemminger93fa1592010-04-12 05:41:31 +00005329
David Ahern799977d2016-03-02 11:30:07 -08005330 ip6_del_rt(ifp->rt);
5331
Hannes Frederic Sowa705f1c82014-09-28 00:46:06 +02005332 rt_genid_bump_ipv6(net);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005333 break;
5334 }
Nicolas Dichtel63998ac2013-03-22 06:28:43 +00005335 atomic_inc(&net->ipv6.dev_addr_genid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005336}
5337
5338static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
5339{
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07005340 rcu_read_lock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07005341 if (likely(ifp->idev->dead == 0))
5342 __ipv6_ifa_notify(event, ifp);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -07005343 rcu_read_unlock_bh();
Linus Torvalds1da177e2005-04-16 15:20:36 -07005344}
5345
5346#ifdef CONFIG_SYSCTL
5347
5348static
Joe Perchesfe2c6332013-06-11 23:04:25 -07005349int addrconf_sysctl_forward(struct ctl_table *ctl, int write,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005350 void __user *buffer, size_t *lenp, loff_t *ppos)
5351{
5352 int *valp = ctl->data;
5353 int val = *valp;
Eric W. Biederman88af1822010-02-19 13:22:59 +00005354 loff_t pos = *ppos;
Joe Perchesfe2c6332013-06-11 23:04:25 -07005355 struct ctl_table lctl;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005356 int ret;
5357
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00005358 /*
5359 * ctl->data points to idev->cnf.forwarding, we should
5360 * not modify it until we get the rtnl lock.
5361 */
5362 lctl = *ctl;
5363 lctl.data = &val;
5364
5365 ret = proc_dointvec(&lctl, write, buffer, lenp, ppos);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005366
Pavel Emelyanovc8fecf22007-12-05 01:50:24 -08005367 if (write)
Stephen Hemmingerb325fdd2009-02-26 06:55:31 +00005368 ret = addrconf_fixup_forwarding(ctl, valp, val);
Eric W. Biederman88af1822010-02-19 13:22:59 +00005369 if (ret)
5370 *ppos = pos;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09005371 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005372}
5373
Marcelo Leitner77751422015-02-23 11:17:13 -03005374static
Phil Sutterd6df1982015-12-01 22:45:15 +01005375int addrconf_sysctl_hop_limit(struct ctl_table *ctl, int write,
5376 void __user *buffer, size_t *lenp, loff_t *ppos)
5377{
5378 struct ctl_table lctl;
5379 int min_hl = 1, max_hl = 255;
5380
5381 lctl = *ctl;
5382 lctl.extra1 = &min_hl;
5383 lctl.extra2 = &max_hl;
5384
5385 return proc_dointvec_minmax(&lctl, write, buffer, lenp, ppos);
5386}
5387
5388static
Marcelo Leitner77751422015-02-23 11:17:13 -03005389int addrconf_sysctl_mtu(struct ctl_table *ctl, int write,
5390 void __user *buffer, size_t *lenp, loff_t *ppos)
5391{
5392 struct inet6_dev *idev = ctl->extra1;
5393 int min_mtu = IPV6_MIN_MTU;
5394 struct ctl_table lctl;
5395
5396 lctl = *ctl;
5397 lctl.extra1 = &min_mtu;
5398 lctl.extra2 = idev ? &idev->dev->mtu : NULL;
5399
5400 return proc_dointvec_minmax(&lctl, write, buffer, lenp, ppos);
5401}
5402
Brian Haley56d417b2009-06-01 03:07:33 -07005403static void dev_disable_change(struct inet6_dev *idev)
5404{
Cong Wang75538c22013-05-29 11:30:50 +08005405 struct netdev_notifier_info info;
5406
Brian Haley56d417b2009-06-01 03:07:33 -07005407 if (!idev || !idev->dev)
5408 return;
5409
Cong Wang75538c22013-05-29 11:30:50 +08005410 netdev_notifier_info_init(&info, idev->dev);
Brian Haley56d417b2009-06-01 03:07:33 -07005411 if (idev->cnf.disable_ipv6)
Cong Wang75538c22013-05-29 11:30:50 +08005412 addrconf_notify(NULL, NETDEV_DOWN, &info);
Brian Haley56d417b2009-06-01 03:07:33 -07005413 else
Cong Wang75538c22013-05-29 11:30:50 +08005414 addrconf_notify(NULL, NETDEV_UP, &info);
Brian Haley56d417b2009-06-01 03:07:33 -07005415}
5416
5417static void addrconf_disable_change(struct net *net, __s32 newf)
5418{
5419 struct net_device *dev;
5420 struct inet6_dev *idev;
5421
Eric Dumazetc6d14c82009-11-04 05:43:23 -08005422 rcu_read_lock();
5423 for_each_netdev_rcu(net, dev) {
Brian Haley56d417b2009-06-01 03:07:33 -07005424 idev = __in6_dev_get(dev);
5425 if (idev) {
5426 int changed = (!idev->cnf.disable_ipv6) ^ (!newf);
5427 idev->cnf.disable_ipv6 = newf;
5428 if (changed)
5429 dev_disable_change(idev);
5430 }
Brian Haley56d417b2009-06-01 03:07:33 -07005431 }
Eric Dumazetc6d14c82009-11-04 05:43:23 -08005432 rcu_read_unlock();
Brian Haley56d417b2009-06-01 03:07:33 -07005433}
5434
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00005435static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf)
Brian Haley56d417b2009-06-01 03:07:33 -07005436{
5437 struct net *net;
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00005438 int old;
5439
5440 if (!rtnl_trylock())
5441 return restart_syscall();
Brian Haley56d417b2009-06-01 03:07:33 -07005442
5443 net = (struct net *)table->extra2;
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00005444 old = *p;
5445 *p = newf;
Brian Haley56d417b2009-06-01 03:07:33 -07005446
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00005447 if (p == &net->ipv6.devconf_dflt->disable_ipv6) {
5448 rtnl_unlock();
Brian Haley56d417b2009-06-01 03:07:33 -07005449 return 0;
Eric W. Biederman88af1822010-02-19 13:22:59 +00005450 }
Brian Haley56d417b2009-06-01 03:07:33 -07005451
5452 if (p == &net->ipv6.devconf_all->disable_ipv6) {
Brian Haley56d417b2009-06-01 03:07:33 -07005453 net->ipv6.devconf_dflt->disable_ipv6 = newf;
5454 addrconf_disable_change(net, newf);
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00005455 } else if ((!newf) ^ (!old))
Brian Haley56d417b2009-06-01 03:07:33 -07005456 dev_disable_change((struct inet6_dev *)table->extra1);
5457
5458 rtnl_unlock();
5459 return 0;
5460}
5461
5462static
Joe Perchesfe2c6332013-06-11 23:04:25 -07005463int addrconf_sysctl_disable(struct ctl_table *ctl, int write,
Brian Haley56d417b2009-06-01 03:07:33 -07005464 void __user *buffer, size_t *lenp, loff_t *ppos)
5465{
5466 int *valp = ctl->data;
5467 int val = *valp;
Eric W. Biederman88af1822010-02-19 13:22:59 +00005468 loff_t pos = *ppos;
Joe Perchesfe2c6332013-06-11 23:04:25 -07005469 struct ctl_table lctl;
Brian Haley56d417b2009-06-01 03:07:33 -07005470 int ret;
5471
Francesco Ruggeri013d97e2012-01-16 10:40:10 +00005472 /*
5473 * ctl->data points to idev->cnf.disable_ipv6, we should
5474 * not modify it until we get the rtnl lock.
5475 */
5476 lctl = *ctl;
5477 lctl.data = &val;
5478
5479 ret = proc_dointvec(&lctl, write, buffer, lenp, ppos);
Brian Haley56d417b2009-06-01 03:07:33 -07005480
5481 if (write)
5482 ret = addrconf_disable_ipv6(ctl, valp, val);
Eric W. Biederman88af1822010-02-19 13:22:59 +00005483 if (ret)
5484 *ppos = pos;
Brian Haley56d417b2009-06-01 03:07:33 -07005485 return ret;
5486}
5487
stephen hemmingerc92d5492013-12-17 22:37:14 -08005488static
5489int addrconf_sysctl_proxy_ndp(struct ctl_table *ctl, int write,
5490 void __user *buffer, size_t *lenp, loff_t *ppos)
5491{
5492 int *valp = ctl->data;
5493 int ret;
5494 int old, new;
5495
5496 old = *valp;
5497 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
5498 new = *valp;
5499
5500 if (write && old != new) {
5501 struct net *net = ctl->extra2;
5502
5503 if (!rtnl_trylock())
5504 return restart_syscall();
5505
5506 if (valp == &net->ipv6.devconf_dflt->proxy_ndp)
5507 inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH,
5508 NETCONFA_IFINDEX_DEFAULT,
5509 net->ipv6.devconf_dflt);
5510 else if (valp == &net->ipv6.devconf_all->proxy_ndp)
5511 inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH,
5512 NETCONFA_IFINDEX_ALL,
5513 net->ipv6.devconf_all);
5514 else {
5515 struct inet6_dev *idev = ctl->extra1;
5516
5517 inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH,
5518 idev->dev->ifindex,
5519 &idev->cnf);
5520 }
5521 rtnl_unlock();
5522 }
5523
5524 return ret;
5525}
5526
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +01005527static int addrconf_sysctl_stable_secret(struct ctl_table *ctl, int write,
5528 void __user *buffer, size_t *lenp,
5529 loff_t *ppos)
5530{
5531 int err;
5532 struct in6_addr addr;
5533 char str[IPV6_MAX_STRLEN];
5534 struct ctl_table lctl = *ctl;
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01005535 struct net *net = ctl->extra2;
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +01005536 struct ipv6_stable_secret *secret = ctl->data;
5537
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01005538 if (&net->ipv6.devconf_all->stable_secret == ctl->data)
5539 return -EIO;
5540
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +01005541 lctl.maxlen = IPV6_MAX_STRLEN;
5542 lctl.data = str;
5543
5544 if (!rtnl_trylock())
5545 return restart_syscall();
5546
5547 if (!write && !secret->initialized) {
5548 err = -EIO;
5549 goto out;
5550 }
5551
WANG Cong5449a5c2015-12-21 10:55:45 -08005552 err = snprintf(str, sizeof(str), "%pI6", &secret->secret);
5553 if (err >= sizeof(str)) {
5554 err = -EIO;
5555 goto out;
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +01005556 }
5557
5558 err = proc_dostring(&lctl, write, buffer, lenp, ppos);
5559 if (err || !write)
5560 goto out;
5561
5562 if (in6_pton(str, -1, addr.in6_u.u6_addr8, -1, NULL) != 1) {
5563 err = -EIO;
5564 goto out;
5565 }
5566
5567 secret->initialized = true;
5568 secret->secret = addr;
5569
Hannes Frederic Sowa622c81d2015-03-23 23:36:01 +01005570 if (&net->ipv6.devconf_dflt->stable_secret == ctl->data) {
5571 struct net_device *dev;
5572
5573 for_each_netdev(net, dev) {
5574 struct inet6_dev *idev = __in6_dev_get(dev);
5575
5576 if (idev) {
5577 idev->addr_gen_mode =
5578 IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
5579 }
5580 }
5581 } else {
5582 struct inet6_dev *idev = ctl->extra1;
5583
5584 idev->addr_gen_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
5585 }
5586
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +01005587out:
5588 rtnl_unlock();
5589
5590 return err;
5591}
stephen hemmingerc92d5492013-12-17 22:37:14 -08005592
Andy Gospodarek35103d12015-08-13 10:39:01 -04005593static
5594int addrconf_sysctl_ignore_routes_with_linkdown(struct ctl_table *ctl,
5595 int write,
5596 void __user *buffer,
5597 size_t *lenp,
5598 loff_t *ppos)
5599{
5600 int *valp = ctl->data;
5601 int val = *valp;
5602 loff_t pos = *ppos;
5603 struct ctl_table lctl;
5604 int ret;
5605
5606 /* ctl->data points to idev->cnf.ignore_routes_when_linkdown
5607 * we should not modify it until we get the rtnl lock.
5608 */
5609 lctl = *ctl;
5610 lctl.data = &val;
5611
5612 ret = proc_dointvec(&lctl, write, buffer, lenp, ppos);
5613
5614 if (write)
5615 ret = addrconf_fixup_linkdown(ctl, valp, val);
5616 if (ret)
5617 *ppos = pos;
5618 return ret;
5619}
5620
Linus Torvalds1da177e2005-04-16 15:20:36 -07005621static struct addrconf_sysctl_table
5622{
5623 struct ctl_table_header *sysctl_header;
Joe Perchesfe2c6332013-06-11 23:04:25 -07005624 struct ctl_table addrconf_vars[DEVCONF_MAX+1];
Brian Haleyab32ea52006-09-22 14:15:41 -07005625} addrconf_sysctl __read_mostly = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005626 .sysctl_header = NULL,
5627 .addrconf_vars = {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09005628 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005629 .procname = "forwarding",
5630 .data = &ipv6_devconf.forwarding,
5631 .maxlen = sizeof(int),
5632 .mode = 0644,
5633 .proc_handler = addrconf_sysctl_forward,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005634 },
5635 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005636 .procname = "hop_limit",
5637 .data = &ipv6_devconf.hop_limit,
5638 .maxlen = sizeof(int),
5639 .mode = 0644,
Phil Sutterd6df1982015-12-01 22:45:15 +01005640 .proc_handler = addrconf_sysctl_hop_limit,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005641 },
5642 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005643 .procname = "mtu",
5644 .data = &ipv6_devconf.mtu6,
5645 .maxlen = sizeof(int),
5646 .mode = 0644,
Marcelo Leitner77751422015-02-23 11:17:13 -03005647 .proc_handler = addrconf_sysctl_mtu,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005648 },
5649 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005650 .procname = "accept_ra",
5651 .data = &ipv6_devconf.accept_ra,
5652 .maxlen = sizeof(int),
5653 .mode = 0644,
5654 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005655 },
5656 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005657 .procname = "accept_redirects",
5658 .data = &ipv6_devconf.accept_redirects,
5659 .maxlen = sizeof(int),
5660 .mode = 0644,
5661 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005662 },
5663 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005664 .procname = "autoconf",
5665 .data = &ipv6_devconf.autoconf,
5666 .maxlen = sizeof(int),
5667 .mode = 0644,
5668 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005669 },
5670 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005671 .procname = "dad_transmits",
5672 .data = &ipv6_devconf.dad_transmits,
5673 .maxlen = sizeof(int),
5674 .mode = 0644,
5675 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005676 },
5677 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005678 .procname = "router_solicitations",
5679 .data = &ipv6_devconf.rtr_solicits,
5680 .maxlen = sizeof(int),
5681 .mode = 0644,
5682 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005683 },
5684 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005685 .procname = "router_solicitation_interval",
5686 .data = &ipv6_devconf.rtr_solicit_interval,
5687 .maxlen = sizeof(int),
5688 .mode = 0644,
5689 .proc_handler = proc_dointvec_jiffies,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005690 },
5691 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005692 .procname = "router_solicitation_delay",
5693 .data = &ipv6_devconf.rtr_solicit_delay,
5694 .maxlen = sizeof(int),
5695 .mode = 0644,
5696 .proc_handler = proc_dointvec_jiffies,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005697 },
5698 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005699 .procname = "force_mld_version",
5700 .data = &ipv6_devconf.force_mld_version,
5701 .maxlen = sizeof(int),
5702 .mode = 0644,
5703 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005704 },
Hannes Frederic Sowafc4eba52013-08-14 01:03:46 +02005705 {
5706 .procname = "mldv1_unsolicited_report_interval",
5707 .data =
5708 &ipv6_devconf.mldv1_unsolicited_report_interval,
5709 .maxlen = sizeof(int),
5710 .mode = 0644,
5711 .proc_handler = proc_dointvec_ms_jiffies,
5712 },
5713 {
5714 .procname = "mldv2_unsolicited_report_interval",
5715 .data =
5716 &ipv6_devconf.mldv2_unsolicited_report_interval,
5717 .maxlen = sizeof(int),
5718 .mode = 0644,
5719 .proc_handler = proc_dointvec_ms_jiffies,
5720 },
Linus Torvalds1da177e2005-04-16 15:20:36 -07005721 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005722 .procname = "use_tempaddr",
5723 .data = &ipv6_devconf.use_tempaddr,
5724 .maxlen = sizeof(int),
5725 .mode = 0644,
5726 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005727 },
5728 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005729 .procname = "temp_valid_lft",
5730 .data = &ipv6_devconf.temp_valid_lft,
5731 .maxlen = sizeof(int),
5732 .mode = 0644,
5733 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005734 },
5735 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005736 .procname = "temp_prefered_lft",
5737 .data = &ipv6_devconf.temp_prefered_lft,
5738 .maxlen = sizeof(int),
5739 .mode = 0644,
5740 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005741 },
5742 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005743 .procname = "regen_max_retry",
5744 .data = &ipv6_devconf.regen_max_retry,
5745 .maxlen = sizeof(int),
5746 .mode = 0644,
5747 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005748 },
5749 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005750 .procname = "max_desync_factor",
5751 .data = &ipv6_devconf.max_desync_factor,
5752 .maxlen = sizeof(int),
5753 .mode = 0644,
5754 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005755 },
Linus Torvalds1da177e2005-04-16 15:20:36 -07005756 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005757 .procname = "max_addresses",
5758 .data = &ipv6_devconf.max_addresses,
5759 .maxlen = sizeof(int),
5760 .mode = 0644,
5761 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005762 },
5763 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005764 .procname = "accept_ra_defrtr",
5765 .data = &ipv6_devconf.accept_ra_defrtr,
5766 .maxlen = sizeof(int),
5767 .mode = 0644,
5768 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -08005769 },
5770 {
Hangbin Liu8013d1d2015-07-30 14:28:42 +08005771 .procname = "accept_ra_min_hop_limit",
5772 .data = &ipv6_devconf.accept_ra_min_hop_limit,
5773 .maxlen = sizeof(int),
5774 .mode = 0644,
5775 .proc_handler = proc_dointvec,
5776 },
5777 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005778 .procname = "accept_ra_pinfo",
5779 .data = &ipv6_devconf.accept_ra_pinfo,
5780 .maxlen = sizeof(int),
5781 .mode = 0644,
5782 .proc_handler = proc_dointvec,
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -08005783 },
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08005784#ifdef CONFIG_IPV6_ROUTER_PREF
5785 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005786 .procname = "accept_ra_rtr_pref",
5787 .data = &ipv6_devconf.accept_ra_rtr_pref,
5788 .maxlen = sizeof(int),
5789 .mode = 0644,
5790 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08005791 },
YOSHIFUJI Hideaki52e16352006-03-20 17:05:47 -08005792 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005793 .procname = "router_probe_interval",
5794 .data = &ipv6_devconf.rtr_probe_interval,
5795 .maxlen = sizeof(int),
5796 .mode = 0644,
5797 .proc_handler = proc_dointvec_jiffies,
YOSHIFUJI Hideaki52e16352006-03-20 17:05:47 -08005798 },
Neil Hormanfa03ef32007-01-30 14:30:10 -08005799#ifdef CONFIG_IPV6_ROUTE_INFO
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -08005800 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005801 .procname = "accept_ra_rt_info_max_plen",
5802 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
5803 .maxlen = sizeof(int),
5804 .mode = 0644,
5805 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -08005806 },
5807#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -08005808#endif
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -08005809 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005810 .procname = "proxy_ndp",
5811 .data = &ipv6_devconf.proxy_ndp,
5812 .maxlen = sizeof(int),
5813 .mode = 0644,
stephen hemmingerc92d5492013-12-17 22:37:14 -08005814 .proc_handler = addrconf_sysctl_proxy_ndp,
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -07005815 },
5816 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005817 .procname = "accept_source_route",
5818 .data = &ipv6_devconf.accept_source_route,
5819 .maxlen = sizeof(int),
5820 .mode = 0644,
5821 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -07005822 },
Neil Horman95c385b2007-04-25 17:08:10 -07005823#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
5824 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005825 .procname = "optimistic_dad",
5826 .data = &ipv6_devconf.optimistic_dad,
5827 .maxlen = sizeof(int),
5828 .mode = 0644,
5829 .proc_handler = proc_dointvec,
Neil Horman95c385b2007-04-25 17:08:10 -07005830
5831 },
Erik Kline7fd25612014-10-28 18:11:14 +09005832 {
5833 .procname = "use_optimistic",
5834 .data = &ipv6_devconf.use_optimistic,
5835 .maxlen = sizeof(int),
5836 .mode = 0644,
5837 .proc_handler = proc_dointvec,
5838
5839 },
Neil Horman95c385b2007-04-25 17:08:10 -07005840#endif
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09005841#ifdef CONFIG_IPV6_MROUTE
5842 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005843 .procname = "mc_forwarding",
5844 .data = &ipv6_devconf.mc_forwarding,
5845 .maxlen = sizeof(int),
5846 .mode = 0444,
5847 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +09005848 },
5849#endif
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -07005850 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005851 .procname = "disable_ipv6",
5852 .data = &ipv6_devconf.disable_ipv6,
5853 .maxlen = sizeof(int),
5854 .mode = 0644,
5855 .proc_handler = addrconf_sysctl_disable,
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +09005856 },
5857 {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005858 .procname = "accept_dad",
5859 .data = &ipv6_devconf.accept_dad,
5860 .maxlen = sizeof(int),
5861 .mode = 0644,
5862 .proc_handler = proc_dointvec,
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +09005863 },
5864 {
Octavian Purdilaf7734fd2009-10-02 11:39:15 +00005865 .procname = "force_tllao",
5866 .data = &ipv6_devconf.force_tllao,
5867 .maxlen = sizeof(int),
5868 .mode = 0644,
5869 .proc_handler = proc_dointvec
5870 },
5871 {
Hannes Frederic Sowa5cb04432012-11-06 16:46:20 +00005872 .procname = "ndisc_notify",
5873 .data = &ipv6_devconf.ndisc_notify,
5874 .maxlen = sizeof(int),
5875 .mode = 0644,
5876 .proc_handler = proc_dointvec
5877 },
5878 {
Hannes Frederic Sowab800c3b2013-08-27 01:36:51 +02005879 .procname = "suppress_frag_ndisc",
5880 .data = &ipv6_devconf.suppress_frag_ndisc,
5881 .maxlen = sizeof(int),
5882 .mode = 0644,
5883 .proc_handler = proc_dointvec
5884 },
5885 {
Ben Greeard9333192014-06-25 14:44:53 -07005886 .procname = "accept_ra_from_local",
5887 .data = &ipv6_devconf.accept_ra_from_local,
5888 .maxlen = sizeof(int),
5889 .mode = 0644,
5890 .proc_handler = proc_dointvec,
5891 },
5892 {
Harout Hedeshianc2943f12015-01-20 10:06:05 -07005893 .procname = "accept_ra_mtu",
5894 .data = &ipv6_devconf.accept_ra_mtu,
5895 .maxlen = sizeof(int),
5896 .mode = 0644,
5897 .proc_handler = proc_dointvec,
5898 },
5899 {
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +01005900 .procname = "stable_secret",
5901 .data = &ipv6_devconf.stable_secret,
5902 .maxlen = IPV6_MAX_STRLEN,
5903 .mode = 0600,
5904 .proc_handler = addrconf_sysctl_stable_secret,
5905 },
5906 {
Erik Kline3985e8a2015-07-22 16:38:25 +09005907 .procname = "use_oif_addrs_only",
5908 .data = &ipv6_devconf.use_oif_addrs_only,
5909 .maxlen = sizeof(int),
5910 .mode = 0644,
5911 .proc_handler = proc_dointvec,
Andy Gospodarek35103d12015-08-13 10:39:01 -04005912 },
5913 {
5914 .procname = "ignore_routes_with_linkdown",
5915 .data = &ipv6_devconf.ignore_routes_with_linkdown,
5916 .maxlen = sizeof(int),
5917 .mode = 0644,
5918 .proc_handler = addrconf_sysctl_ignore_routes_with_linkdown,
Erik Kline3985e8a2015-07-22 16:38:25 +09005919 },
5920 {
Johannes Bergabbc3042016-02-04 13:31:19 +01005921 .procname = "drop_unicast_in_l2_multicast",
5922 .data = &ipv6_devconf.drop_unicast_in_l2_multicast,
5923 .maxlen = sizeof(int),
5924 .mode = 0644,
5925 .proc_handler = proc_dointvec,
5926 },
5927 {
Johannes Berg7a02bf82016-02-04 13:31:20 +01005928 .procname = "drop_unsolicited_na",
5929 .data = &ipv6_devconf.drop_unsolicited_na,
5930 .maxlen = sizeof(int),
5931 .mode = 0644,
5932 .proc_handler = proc_dointvec,
5933 },
5934 {
David Ahernf1705ec2016-02-24 09:25:37 -08005935 .procname = "keep_addr_on_down",
5936 .data = &ipv6_devconf.keep_addr_on_down,
5937 .maxlen = sizeof(int),
5938 .mode = 0644,
5939 .proc_handler = proc_dointvec,
5940
5941 },
5942 {
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08005943 /* sentinel */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005944 }
5945 },
Linus Torvalds1da177e2005-04-16 15:20:36 -07005946};
5947
Pavel Emelyanovbff16c22008-01-10 17:42:13 -08005948static int __addrconf_sysctl_register(struct net *net, char *dev_name,
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08005949 struct inet6_dev *idev, struct ipv6_devconf *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005950{
5951 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005952 struct addrconf_sysctl_table *t;
Eric W. Biederman6105e292012-04-19 13:41:24 +00005953 char path[sizeof("net/ipv6/conf/") + IFNAMSIZ];
Pavel Emelyanov1dab6222007-12-02 00:59:38 +11005954
Arnaldo Carvalho de Meloaf879cc2006-11-17 12:14:37 -02005955 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
Ian Morris63159f22015-03-29 14:00:04 +01005956 if (!t)
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11005957 goto out;
5958
Stephen Hemmingerbcdd5532010-03-20 16:08:18 -07005959 for (i = 0; t->addrconf_vars[i].data; i++) {
Stephen Hemmingere21e8462010-03-20 16:09:01 -07005960 t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005961 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
Pavel Emelyanovbff16c22008-01-10 17:42:13 -08005962 t->addrconf_vars[i].extra2 = net;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005963 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005964
Eric W. Biederman6105e292012-04-19 13:41:24 +00005965 snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005966
Eric W. Biederman6105e292012-04-19 13:41:24 +00005967 t->sysctl_header = register_net_sysctl(net, path, t->addrconf_vars);
Ian Morris63159f22015-03-29 14:00:04 +01005968 if (!t->sysctl_header)
Eric W. Biederman6105e292012-04-19 13:41:24 +00005969 goto free;
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11005970
5971 p->sysctl = t;
Pavel Emelyanov95897312008-01-10 17:41:45 -08005972 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005973
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11005974free:
Linus Torvalds1da177e2005-04-16 15:20:36 -07005975 kfree(t);
Pavel Emelyanovf68635e2007-12-02 00:21:52 +11005976out:
Pavel Emelyanov95897312008-01-10 17:41:45 -08005977 return -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005978}
5979
Pavel Emelyanov408c4762008-01-10 17:41:21 -08005980static void __addrconf_sysctl_unregister(struct ipv6_devconf *p)
5981{
5982 struct addrconf_sysctl_table *t;
5983
Ian Morris63159f22015-03-29 14:00:04 +01005984 if (!p->sysctl)
Pavel Emelyanov408c4762008-01-10 17:41:21 -08005985 return;
5986
5987 t = p->sysctl;
5988 p->sysctl = NULL;
Lucian Adrian Grijincuff538812011-05-01 01:44:01 +00005989 unregister_net_sysctl_table(t->sysctl_header);
Pavel Emelyanov408c4762008-01-10 17:41:21 -08005990 kfree(t);
5991}
5992
WANG Conga317a2f2014-07-25 15:25:09 -07005993static int addrconf_sysctl_register(struct inet6_dev *idev)
Pavel Emelyanovf52295a2007-12-02 00:58:37 +11005994{
WANG Conga317a2f2014-07-25 15:25:09 -07005995 int err;
5996
5997 if (!sysctl_dev_name_is_allowed(idev->dev->name))
5998 return -EINVAL;
5999
6000 err = neigh_sysctl_register(idev->dev, idev->nd_parms,
6001 &ndisc_ifinfo_sysctl_change);
6002 if (err)
6003 return err;
6004 err = __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name,
6005 idev, &idev->cnf);
6006 if (err)
6007 neigh_sysctl_unregister(idev->nd_parms);
6008
6009 return err;
Pavel Emelyanovf52295a2007-12-02 00:58:37 +11006010}
6011
Pavel Emelyanov408c4762008-01-10 17:41:21 -08006012static void addrconf_sysctl_unregister(struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006013{
Pavel Emelyanov408c4762008-01-10 17:41:21 -08006014 __addrconf_sysctl_unregister(&idev->cnf);
6015 neigh_sysctl_unregister(idev->nd_parms);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006016}
6017
6018
6019#endif
6020
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00006021static int __net_init addrconf_init_net(struct net *net)
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006022{
Hong Zhiguoa79ca222013-03-26 01:52:45 +08006023 int err = -ENOMEM;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006024 struct ipv6_devconf *all, *dflt;
6025
Hong Zhiguoa79ca222013-03-26 01:52:45 +08006026 all = kmemdup(&ipv6_devconf, sizeof(ipv6_devconf), GFP_KERNEL);
Ian Morris63159f22015-03-29 14:00:04 +01006027 if (!all)
Hong Zhiguoa79ca222013-03-26 01:52:45 +08006028 goto err_alloc_all;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006029
Hong Zhiguoa79ca222013-03-26 01:52:45 +08006030 dflt = kmemdup(&ipv6_devconf_dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL);
Ian Morris63159f22015-03-29 14:00:04 +01006031 if (!dflt)
Hong Zhiguoa79ca222013-03-26 01:52:45 +08006032 goto err_alloc_dflt;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006033
Hong Zhiguoa79ca222013-03-26 01:52:45 +08006034 /* these will be inherited by all namespaces */
6035 dflt->autoconf = ipv6_defaults.autoconf;
6036 dflt->disable_ipv6 = ipv6_defaults.disable_ipv6;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006037
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +01006038 dflt->stable_secret.initialized = false;
6039 all->stable_secret.initialized = false;
6040
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006041 net->ipv6.devconf_all = all;
6042 net->ipv6.devconf_dflt = dflt;
6043
6044#ifdef CONFIG_SYSCTL
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08006045 err = __addrconf_sysctl_register(net, "all", NULL, all);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006046 if (err < 0)
6047 goto err_reg_all;
6048
Eric W. Biedermanf8572d82009-11-05 13:32:03 -08006049 err = __addrconf_sysctl_register(net, "default", NULL, dflt);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006050 if (err < 0)
6051 goto err_reg_dflt;
6052#endif
6053 return 0;
6054
6055#ifdef CONFIG_SYSCTL
6056err_reg_dflt:
6057 __addrconf_sysctl_unregister(all);
6058err_reg_all:
6059 kfree(dflt);
6060#endif
6061err_alloc_dflt:
6062 kfree(all);
6063err_alloc_all:
6064 return err;
6065}
6066
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00006067static void __net_exit addrconf_exit_net(struct net *net)
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006068{
6069#ifdef CONFIG_SYSCTL
6070 __addrconf_sysctl_unregister(net->ipv6.devconf_dflt);
6071 __addrconf_sysctl_unregister(net->ipv6.devconf_all);
6072#endif
zhuyj73cf0e92014-11-26 10:25:58 +08006073 kfree(net->ipv6.devconf_dflt);
6074 kfree(net->ipv6.devconf_all);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006075}
6076
6077static struct pernet_operations addrconf_ops = {
6078 .init = addrconf_init_net,
6079 .exit = addrconf_exit_net,
6080};
6081
Daniel Borkmann207895f2015-01-29 12:15:03 +01006082static struct rtnl_af_ops inet6_ops __read_mostly = {
Thomas Grafb382b192010-11-16 04:33:57 +00006083 .family = AF_INET6,
6084 .fill_link_af = inet6_fill_link_af,
6085 .get_link_af_size = inet6_get_link_af_size,
Daniel Borkmann11b1f822015-02-05 14:39:11 +01006086 .validate_link_af = inet6_validate_link_af,
Daniel Borkmannf53adae2013-04-08 04:01:30 +00006087 .set_link_af = inet6_set_link_af,
Thomas Grafb382b192010-11-16 04:33:57 +00006088};
6089
Linus Torvalds1da177e2005-04-16 15:20:36 -07006090/*
6091 * Init / cleanup code
6092 */
6093
6094int __init addrconf_init(void)
6095{
WANG Conga317a2f2014-07-25 15:25:09 -07006096 struct inet6_dev *idev;
stephen hemmingerc2e21292010-03-17 20:31:10 +00006097 int i, err;
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +09006098
Stephen Hemmingere21e8462010-03-20 16:09:01 -07006099 err = ipv6_addr_label_init();
6100 if (err < 0) {
Joe Perchesf3213832012-05-15 14:11:53 +00006101 pr_crit("%s: cannot initialize default policy table: %d\n",
6102 __func__, err);
Neil Horman2cc6d2b2010-09-24 09:55:52 +00006103 goto out;
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +09006104 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07006105
Neil Horman2cc6d2b2010-09-24 09:55:52 +00006106 err = register_pernet_subsys(&addrconf_ops);
6107 if (err < 0)
6108 goto out_addrlabel;
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006109
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01006110 addrconf_wq = create_workqueue("ipv6_addrconf");
6111 if (!addrconf_wq) {
6112 err = -ENOMEM;
6113 goto out_nowq;
6114 }
6115
Linus Torvalds1da177e2005-04-16 15:20:36 -07006116 /* The addrconf netdev notifier requires that loopback_dev
6117 * has it's ipv6 private information allocated and setup
6118 * before it can bring up and give link-local addresses
6119 * to other devices which are up.
6120 *
6121 * Unfortunately, loopback_dev is not necessarily the first
6122 * entry in the global dev_base list of net devices. In fact,
6123 * it is likely to be the very last entry on that list.
6124 * So this causes the notifier registry below to try and
6125 * give link-local addresses to all devices besides loopback_dev
6126 * first, then loopback_dev, which cases all the non-loopback_dev
6127 * devices to fail to get a link-local address.
6128 *
6129 * So, as a temporary fix, allocate the ipv6 structure for
6130 * loopback_dev first by hand.
6131 * Longer term, all of the dependencies ipv6 has upon the loopback
6132 * device and it being up should be removed.
6133 */
6134 rtnl_lock();
WANG Conga317a2f2014-07-25 15:25:09 -07006135 idev = ipv6_add_dev(init_net.loopback_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006136 rtnl_unlock();
WANG Conga317a2f2014-07-25 15:25:09 -07006137 if (IS_ERR(idev)) {
6138 err = PTR_ERR(idev);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006139 goto errlo;
WANG Conga317a2f2014-07-25 15:25:09 -07006140 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07006141
stephen hemmingerc2e21292010-03-17 20:31:10 +00006142 for (i = 0; i < IN6_ADDR_HSIZE; i++)
6143 INIT_HLIST_HEAD(&inet6_addr_lst[i]);
6144
Linus Torvalds1da177e2005-04-16 15:20:36 -07006145 register_netdevice_notifier(&ipv6_dev_notf);
6146
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01006147 addrconf_verify();
Thomas Grafc127ea22007-03-22 11:58:32 -07006148
stephen hemminger3678a9d2013-12-30 10:41:32 -08006149 rtnl_af_register(&inet6_ops);
Thomas Grafb382b192010-11-16 04:33:57 +00006150
Greg Rosec7ac8672011-06-10 01:27:09 +00006151 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo,
6152 NULL);
Thomas Grafc127ea22007-03-22 11:58:32 -07006153 if (err < 0)
6154 goto errout;
6155
6156 /* Only the first call to __rtnl_register can fail */
Greg Rosec7ac8672011-06-10 01:27:09 +00006157 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL);
6158 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL);
6159 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr,
6160 inet6_dump_ifaddr, NULL);
6161 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL,
6162 inet6_dump_ifmcaddr, NULL);
6163 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL,
6164 inet6_dump_ifacaddr, NULL);
Nicolas Dichtel76f8f6c2012-10-25 22:28:51 +00006165 __rtnl_register(PF_INET6, RTM_GETNETCONF, inet6_netconf_get_devconf,
Nicolas Dichtel7a674202013-03-05 23:42:06 +00006166 inet6_netconf_dump_devconf, NULL);
Thomas Grafc127ea22007-03-22 11:58:32 -07006167
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +09006168 ipv6_addr_label_rtnl_register();
6169
Linus Torvalds1da177e2005-04-16 15:20:36 -07006170 return 0;
Thomas Grafc127ea22007-03-22 11:58:32 -07006171errout:
Thomas Grafb382b192010-11-16 04:33:57 +00006172 rtnl_af_unregister(&inet6_ops);
Thomas Grafc127ea22007-03-22 11:58:32 -07006173 unregister_netdevice_notifier(&ipv6_dev_notf);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006174errlo:
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01006175 destroy_workqueue(addrconf_wq);
6176out_nowq:
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006177 unregister_pernet_subsys(&addrconf_ops);
Neil Horman2cc6d2b2010-09-24 09:55:52 +00006178out_addrlabel:
6179 ipv6_addr_label_cleanup();
6180out:
Thomas Grafc127ea22007-03-22 11:58:32 -07006181 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006182}
6183
Daniel Lezcano09f77092007-12-13 05:34:58 -08006184void addrconf_cleanup(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006185{
Daniel Lezcano176c39a2009-03-03 01:06:45 -08006186 struct net_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006187 int i;
6188
6189 unregister_netdevice_notifier(&ipv6_dev_notf);
Pavel Emelyanove0da5a42008-01-10 17:42:55 -08006190 unregister_pernet_subsys(&addrconf_ops);
Neil Horman2cc6d2b2010-09-24 09:55:52 +00006191 ipv6_addr_label_cleanup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07006192
6193 rtnl_lock();
6194
Thomas Grafb382b192010-11-16 04:33:57 +00006195 __rtnl_af_unregister(&inet6_ops);
6196
Daniel Lezcano176c39a2009-03-03 01:06:45 -08006197 /* clean dev list */
6198 for_each_netdev(&init_net, dev) {
6199 if (__in6_dev_get(dev) == NULL)
6200 continue;
6201 addrconf_ifdown(dev, 1);
6202 }
6203 addrconf_ifdown(init_net.loopback_dev, 2);
6204
Linus Torvalds1da177e2005-04-16 15:20:36 -07006205 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07006206 * Check hash table.
6207 */
stephen hemminger5c578ae2010-03-17 20:31:11 +00006208 spin_lock_bh(&addrconf_hash_lock);
stephen hemmingerc2e21292010-03-17 20:31:10 +00006209 for (i = 0; i < IN6_ADDR_HSIZE; i++)
6210 WARN_ON(!hlist_empty(&inet6_addr_lst[i]));
stephen hemminger5c578ae2010-03-17 20:31:11 +00006211 spin_unlock_bh(&addrconf_hash_lock);
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01006212 cancel_delayed_work(&addr_chk_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006213 rtnl_unlock();
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +01006214
6215 destroy_workqueue(addrconf_wq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006216}