Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * IPv6 Address [auto]configuration |
| 3 | * Linux INET6 implementation |
| 4 | * |
| 5 | * Authors: |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> |
| 8 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * 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 Hideaki | b1cacb6 | 2005-11-08 09:38:12 -0800 | [diff] [blame] | 36 | * YOSHIFUJI Hideaki @USAGI : improved source address |
| 37 | * selection; consider scope, |
| 38 | * status etc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | */ |
| 40 | |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 41 | #define pr_fmt(fmt) "IPv6: " fmt |
| 42 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include <linux/errno.h> |
| 44 | #include <linux/types.h> |
Ilpo Järvinen | a0bffff | 2009-03-21 13:36:17 -0700 | [diff] [blame] | 45 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #include <linux/socket.h> |
| 47 | #include <linux/sockios.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #include <linux/net.h> |
Hannes Frederic Sowa | 3d1bec9 | 2015-03-23 23:36:00 +0100 | [diff] [blame] | 49 | #include <linux/inet.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #include <linux/in6.h> |
| 51 | #include <linux/netdevice.h> |
Thomas Graf | 1823730 | 2006-08-04 23:04:54 -0700 | [diff] [blame] | 52 | #include <linux/if_addr.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #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 Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 59 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | #ifdef CONFIG_SYSCTL |
| 61 | #include <linux/sysctl.h> |
| 62 | #endif |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 63 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | #include <linux/delay.h> |
| 65 | #include <linux/notifier.h> |
Paulo Marques | 543537b | 2005-06-23 00:09:02 -0700 | [diff] [blame] | 66 | #include <linux/string.h> |
Eric Dumazet | ddbe503 | 2012-07-18 08:11:12 +0000 | [diff] [blame] | 67 | #include <linux/hash.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 69 | #include <net/net_namespace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | #include <net/sock.h> |
| 71 | #include <net/snmp.h> |
| 72 | |
Alexander Aring | 5241c2d | 2015-12-14 20:55:22 +0100 | [diff] [blame] | 73 | #include <net/6lowpan.h> |
YOSHIFUJI Hideaki / 吉藤英明 | cb6bf35 | 2013-03-25 08:26:24 +0000 | [diff] [blame] | 74 | #include <net/firewire.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | #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 Graf | 5d62026 | 2006-08-15 00:35:02 -0700 | [diff] [blame] | 82 | #include <net/netlink.h> |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 83 | #include <net/pkt_sched.h> |
David Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 84 | #include <net/l3mdev.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | #include <linux/if_tunnel.h> |
| 86 | #include <linux/rtnetlink.h> |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 87 | #include <linux/netconf.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | #include <linux/random.h> |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 89 | #include <linux/uaccess.h> |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 90 | #include <asm/unaligned.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | |
| 92 | #include <linux/proc_fs.h> |
| 93 | #include <linux/seq_file.h> |
Paul Gortmaker | bc3b2d7 | 2011-07-15 11:47:34 -0400 | [diff] [blame] | 94 | #include <linux/export.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | |
| 96 | /* Set to 3 to get tracing... */ |
| 97 | #define ACONF_DEBUG 2 |
| 98 | |
| 99 | #if ACONF_DEBUG >= 3 |
dingtianhong | ba3542e | 2013-08-17 10:27:04 +0800 | [diff] [blame] | 100 | #define ADBG(fmt, ...) printk(fmt, ##__VA_ARGS__) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | #else |
dingtianhong | ba3542e | 2013-08-17 10:27:04 +0800 | [diff] [blame] | 102 | #define ADBG(fmt, ...) do { if (0) printk(fmt, ##__VA_ARGS__); } while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | #endif |
| 104 | |
| 105 | #define INFINITY_LIFE_TIME 0xFFFFFFFF |
Thomas Graf | 18a31e1 | 2010-11-17 04:12:02 +0000 | [diff] [blame] | 106 | |
Hannes Frederic Sowa | 3d1bec9 | 2015-03-23 23:36:00 +0100 | [diff] [blame] | 107 | #define IPV6_MAX_STRLEN \ |
| 108 | sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255") |
| 109 | |
Thomas Graf | 18a31e1 | 2010-11-17 04:12:02 +0000 | [diff] [blame] | 110 | static inline u32 cstamp_delta(unsigned long cstamp) |
| 111 | { |
| 112 | return (cstamp - INITIAL_JIFFIES) * 100UL / HZ; |
| 113 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | |
| 115 | #ifdef CONFIG_SYSCTL |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 116 | static int addrconf_sysctl_register(struct inet6_dev *idev); |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 117 | static void addrconf_sysctl_unregister(struct inet6_dev *idev); |
| 118 | #else |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 119 | static inline int addrconf_sysctl_register(struct inet6_dev *idev) |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 120 | { |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 121 | return 0; |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 122 | } |
| 123 | |
| 124 | static inline void addrconf_sysctl_unregister(struct inet6_dev *idev) |
| 125 | { |
| 126 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | #endif |
| 128 | |
Sorin Dumitru | eb7e057 | 2012-08-30 02:01:45 +0000 | [diff] [blame] | 129 | static void __ipv6_regen_rndid(struct inet6_dev *idev); |
| 130 | static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | static void ipv6_regen_rndid(unsigned long data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 133 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | static int ipv6_count_addresses(struct inet6_dev *idev); |
Hannes Frederic Sowa | 622c81d | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 135 | static int ipv6_generate_stable_address(struct in6_addr *addr, |
| 136 | u8 dad_count, |
| 137 | const struct inet6_dev *idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | |
| 139 | /* |
| 140 | * Configured unicast address hash table |
| 141 | */ |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 142 | static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE]; |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 143 | static DEFINE_SPINLOCK(addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 145 | static void addrconf_verify(void); |
| 146 | static void addrconf_verify_rtnl(void); |
| 147 | static void addrconf_verify_work(struct work_struct *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 149 | static struct workqueue_struct *addrconf_wq; |
| 150 | static DECLARE_DELAYED_WORK(addr_chk_work, addrconf_verify_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | |
| 152 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); |
| 153 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); |
| 154 | |
Jiri Pirko | 93d9b7d | 2010-03-10 10:28:56 +0000 | [diff] [blame] | 155 | static void addrconf_type_change(struct net_device *dev, |
| 156 | unsigned long event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | static int addrconf_ifdown(struct net_device *dev, int how); |
| 158 | |
Romain Kuntz | 21caa66 | 2013-01-09 21:06:03 +0000 | [diff] [blame] | 159 | static 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. Miller | cf22f9a | 2012-04-14 21:37:40 -0400 | [diff] [blame] | 164 | static void addrconf_dad_start(struct inet6_ifaddr *ifp); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 165 | static void addrconf_dad_work(struct work_struct *w); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 167 | static void addrconf_dad_run(struct inet6_dev *idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | static void addrconf_rs_timer(unsigned long data); |
| 169 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); |
| 170 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); |
| 171 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 172 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | struct prefix_info *pinfo); |
David S. Miller | 3e81c6d | 2010-03-20 16:18:00 -0700 | [diff] [blame] | 174 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
| 175 | struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | |
Adrian Bunk | 888c848 | 2008-07-22 14:21:58 -0700 | [diff] [blame] | 177 | static struct ipv6_devconf ipv6_devconf __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | .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 Sowa | fc4eba5 | 2013-08-14 01:03:46 +0200 | [diff] [blame] | 185 | .mldv1_unsolicited_report_interval = 10 * HZ, |
| 186 | .mldv2_unsolicited_report_interval = HZ, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | .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 Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 191 | .use_tempaddr = 0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | .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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | .max_addresses = IPV6_MAX_ADDRESSES, |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 197 | .accept_ra_defrtr = 1, |
Ben Greear | d933319 | 2014-06-25 14:44:53 -0700 | [diff] [blame] | 198 | .accept_ra_from_local = 0, |
Hangbin Liu | 8013d1d | 2015-07-30 14:28:42 +0800 | [diff] [blame] | 199 | .accept_ra_min_hop_limit= 1, |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 200 | .accept_ra_pinfo = 1, |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 201 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 202 | .accept_ra_rtr_pref = 1, |
YOSHIFUJI Hideaki | 52e1635 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 203 | .rtr_probe_interval = 60 * HZ, |
YOSHIFUJI Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 204 | #ifdef CONFIG_IPV6_ROUTE_INFO |
| 205 | .accept_ra_rt_info_max_plen = 0, |
| 206 | #endif |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 207 | #endif |
YOSHIFUJI Hideaki | fbea49e | 2006-09-22 14:43:49 -0700 | [diff] [blame] | 208 | .proxy_ndp = 0, |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 209 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
YOSHIFUJI Hideaki | 778d80b | 2008-06-28 14:17:11 +0900 | [diff] [blame] | 210 | .disable_ipv6 = 0, |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 211 | .accept_dad = 1, |
Hannes Frederic Sowa | b800c3b | 2013-08-27 01:36:51 +0200 | [diff] [blame] | 212 | .suppress_frag_ndisc = 1, |
Harout Hedeshian | c2943f1 | 2015-01-20 10:06:05 -0700 | [diff] [blame] | 213 | .accept_ra_mtu = 1, |
Hannes Frederic Sowa | 3d1bec9 | 2015-03-23 23:36:00 +0100 | [diff] [blame] | 214 | .stable_secret = { |
| 215 | .initialized = false, |
Erik Kline | 3985e8a | 2015-07-22 16:38:25 +0900 | [diff] [blame] | 216 | }, |
| 217 | .use_oif_addrs_only = 0, |
Andy Gospodarek | 35103d1 | 2015-08-13 10:39:01 -0400 | [diff] [blame] | 218 | .ignore_routes_with_linkdown = 0, |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 219 | .keep_addr_on_down = 0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | }; |
| 221 | |
Brian Haley | ab32ea5 | 2006-09-22 14:15:41 -0700 | [diff] [blame] | 222 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | .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 Sowa | fc4eba5 | 2013-08-14 01:03:46 +0200 | [diff] [blame] | 229 | .force_mld_version = 0, |
| 230 | .mldv1_unsolicited_report_interval = 10 * HZ, |
| 231 | .mldv2_unsolicited_report_interval = HZ, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | .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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | .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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | .max_addresses = IPV6_MAX_ADDRESSES, |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 242 | .accept_ra_defrtr = 1, |
Ben Greear | d933319 | 2014-06-25 14:44:53 -0700 | [diff] [blame] | 243 | .accept_ra_from_local = 0, |
Hangbin Liu | 8013d1d | 2015-07-30 14:28:42 +0800 | [diff] [blame] | 244 | .accept_ra_min_hop_limit= 1, |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 245 | .accept_ra_pinfo = 1, |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 246 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 247 | .accept_ra_rtr_pref = 1, |
YOSHIFUJI Hideaki | 52e1635 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 248 | .rtr_probe_interval = 60 * HZ, |
YOSHIFUJI Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 249 | #ifdef CONFIG_IPV6_ROUTE_INFO |
| 250 | .accept_ra_rt_info_max_plen = 0, |
| 251 | #endif |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 252 | #endif |
YOSHIFUJI Hideaki | fbea49e | 2006-09-22 14:43:49 -0700 | [diff] [blame] | 253 | .proxy_ndp = 0, |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 254 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
YOSHIFUJI Hideaki | 778d80b | 2008-06-28 14:17:11 +0900 | [diff] [blame] | 255 | .disable_ipv6 = 0, |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 256 | .accept_dad = 1, |
Hannes Frederic Sowa | b800c3b | 2013-08-27 01:36:51 +0200 | [diff] [blame] | 257 | .suppress_frag_ndisc = 1, |
Harout Hedeshian | c2943f1 | 2015-01-20 10:06:05 -0700 | [diff] [blame] | 258 | .accept_ra_mtu = 1, |
Hannes Frederic Sowa | 3d1bec9 | 2015-03-23 23:36:00 +0100 | [diff] [blame] | 259 | .stable_secret = { |
| 260 | .initialized = false, |
| 261 | }, |
Erik Kline | 3985e8a | 2015-07-22 16:38:25 +0900 | [diff] [blame] | 262 | .use_oif_addrs_only = 0, |
Andy Gospodarek | 35103d1 | 2015-08-13 10:39:01 -0400 | [diff] [blame] | 263 | .ignore_routes_with_linkdown = 0, |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 264 | .keep_addr_on_down = 0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | }; |
| 266 | |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 267 | /* Check if a valid qdisc is available */ |
David S. Miller | 0529794 | 2008-07-08 23:01:27 -0700 | [diff] [blame] | 268 | static inline bool addrconf_qdisc_ok(const struct net_device *dev) |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 269 | { |
David S. Miller | 0529794 | 2008-07-08 23:01:27 -0700 | [diff] [blame] | 270 | return !qdisc_tx_is_noop(dev); |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 271 | } |
| 272 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 273 | static void addrconf_del_rs_timer(struct inet6_dev *idev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | { |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 275 | if (del_timer(&idev->rs_timer)) |
| 276 | __in6_dev_put(idev); |
| 277 | } |
| 278 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 279 | static void addrconf_del_dad_work(struct inet6_ifaddr *ifp) |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 280 | { |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 281 | if (cancel_delayed_work(&ifp->dad_work)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | __in6_ifa_put(ifp); |
| 283 | } |
| 284 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 285 | static void addrconf_mod_rs_timer(struct inet6_dev *idev, |
| 286 | unsigned long when) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | { |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 288 | if (!timer_pending(&idev->rs_timer)) |
| 289 | in6_dev_hold(idev); |
| 290 | mod_timer(&idev->rs_timer, jiffies + when); |
| 291 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 293 | static void addrconf_mod_dad_work(struct inet6_ifaddr *ifp, |
| 294 | unsigned long delay) |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 295 | { |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 296 | if (!delayed_work_pending(&ifp->dad_work)) |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 297 | in6_ifa_hold(ifp); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 298 | mod_delayed_work(addrconf_wq, &ifp->dad_work, delay); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | } |
| 300 | |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 301 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
| 302 | { |
John Stultz | 827da44 | 2013-10-07 15:51:58 -0700 | [diff] [blame] | 303 | int i; |
| 304 | |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 305 | idev->stats.ipv6 = alloc_percpu(struct ipstats_mib); |
| 306 | if (!idev->stats.ipv6) |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 307 | goto err_ip; |
John Stultz | 827da44 | 2013-10-07 15:51:58 -0700 | [diff] [blame] | 308 | |
| 309 | for_each_possible_cpu(i) { |
| 310 | struct ipstats_mib *addrconf_stats; |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 311 | addrconf_stats = per_cpu_ptr(idev->stats.ipv6, i); |
John Stultz | 827da44 | 2013-10-07 15:51:58 -0700 | [diff] [blame] | 312 | u64_stats_init(&addrconf_stats->syncp); |
John Stultz | 827da44 | 2013-10-07 15:51:58 -0700 | [diff] [blame] | 313 | } |
| 314 | |
| 315 | |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 316 | idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device), |
| 317 | GFP_KERNEL); |
| 318 | if (!idev->stats.icmpv6dev) |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 319 | goto err_icmp; |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 320 | idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device), |
| 321 | GFP_KERNEL); |
| 322 | if (!idev->stats.icmpv6msgdev) |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 323 | goto err_icmpmsg; |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 324 | |
| 325 | return 0; |
| 326 | |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 327 | err_icmpmsg: |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 328 | kfree(idev->stats.icmpv6dev); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 329 | err_icmp: |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 330 | free_percpu(idev->stats.ipv6); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 331 | err_ip: |
Pavel Emelyanov | aaf70ec | 2007-10-17 21:25:32 -0700 | [diff] [blame] | 332 | return -ENOMEM; |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 333 | } |
| 334 | |
Eldad Zack | 8e5e8f3 | 2012-04-01 07:49:08 +0000 | [diff] [blame] | 335 | static struct inet6_dev *ipv6_add_dev(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | { |
| 337 | struct inet6_dev *ndev; |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 338 | int err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | |
| 340 | ASSERT_RTNL(); |
| 341 | |
| 342 | if (dev->mtu < IPV6_MIN_MTU) |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 343 | return ERR_PTR(-EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 345 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 346 | if (!ndev) |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 347 | return ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 349 | rwlock_init(&ndev->lock); |
| 350 | ndev->dev = dev; |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 351 | INIT_LIST_HEAD(&ndev->addr_list); |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 352 | setup_timer(&ndev->rs_timer, addrconf_rs_timer, |
| 353 | (unsigned long)ndev); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 354 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
Hannes Frederic Sowa | 9b29c69 | 2015-12-15 22:59:12 +0100 | [diff] [blame] | 355 | |
| 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 Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 361 | ndev->cnf.mtu6 = dev->mtu; |
| 362 | ndev->cnf.sysctl = NULL; |
| 363 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 364 | if (!ndev->nd_parms) { |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 365 | kfree(ndev); |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 366 | return ERR_PTR(err); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 367 | } |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 368 | if (ndev->cnf.forwarding) |
| 369 | dev_disable_lro(dev); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 370 | /* We refer to the device */ |
| 371 | dev_hold(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 373 | if (snmp6_alloc_dev(ndev) < 0) { |
dingtianhong | ba3542e | 2013-08-17 10:27:04 +0800 | [diff] [blame] | 374 | ADBG(KERN_WARNING |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 375 | "%s: cannot allocate memory for statistics; dev=%s.\n", |
dingtianhong | ba3542e | 2013-08-17 10:27:04 +0800 | [diff] [blame] | 376 | __func__, dev->name); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 377 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
Roy Li | 8603e33 | 2011-09-20 15:10:16 -0400 | [diff] [blame] | 378 | dev_put(dev); |
| 379 | kfree(ndev); |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 380 | return ERR_PTR(err); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 381 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 383 | if (snmp6_register_dev(ndev) < 0) { |
dingtianhong | ba3542e | 2013-08-17 10:27:04 +0800 | [diff] [blame] | 384 | ADBG(KERN_WARNING |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 385 | "%s: cannot create /proc/net/dev_snmp6/%s\n", |
dingtianhong | ba3542e | 2013-08-17 10:27:04 +0800 | [diff] [blame] | 386 | __func__, dev->name); |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 387 | goto err_release; |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 388 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 390 | /* One reference from device. We must do this before |
| 391 | * we invoke __ipv6_regen_rndid(). |
| 392 | */ |
| 393 | in6_dev_hold(ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 395 | if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) |
| 396 | ndev->cnf.accept_dad = -1; |
| 397 | |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 398 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
YOSHIFUJI Hideaki | b077d7a | 2008-04-13 23:42:18 -0700 | [diff] [blame] | 399 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 400 | pr_info("%s: Disabled Multicast RS\n", dev->name); |
YOSHIFUJI Hideaki | b077d7a | 2008-04-13 23:42:18 -0700 | [diff] [blame] | 401 | ndev->cnf.rtr_solicits = 0; |
| 402 | } |
| 403 | #endif |
| 404 | |
stephen hemminger | 372e6c8 | 2010-03-17 20:31:09 +0000 | [diff] [blame] | 405 | INIT_LIST_HEAD(&ndev->tempaddr_list); |
Pavel Emelyanov | b24b8a2 | 2008-01-23 21:20:07 -0800 | [diff] [blame] | 406 | setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 407 | if ((dev->flags&IFF_LOOPBACK) || |
| 408 | dev->type == ARPHRD_TUNNEL || |
YOSHIFUJI Hideaki | 9625ed7 | 2008-04-13 23:47:11 -0700 | [diff] [blame] | 409 | dev->type == ARPHRD_TUNNEL6 || |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 410 | dev->type == ARPHRD_SIT || |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 411 | dev->type == ARPHRD_NONE) { |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 412 | ndev->cnf.use_tempaddr = -1; |
| 413 | } else { |
| 414 | in6_dev_hold(ndev); |
| 415 | ipv6_regen_rndid((unsigned long) ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | } |
David S. Miller | 5d9efa7 | 2013-10-28 20:07:50 -0400 | [diff] [blame] | 417 | |
Daniel Borkmann | 914faa1 | 2013-04-09 03:47:14 +0000 | [diff] [blame] | 418 | ndev->token = in6addr_any; |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 419 | |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 420 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
Herbert Xu | 53aadcc | 2007-03-27 14:31:52 -0700 | [diff] [blame] | 421 | ndev->if_flags |= IF_READY; |
| 422 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 423 | ipv6_mc_init_dev(ndev); |
| 424 | ndev->tstamp = jiffies; |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 425 | err = addrconf_sysctl_register(ndev); |
| 426 | if (err) { |
| 427 | ipv6_mc_destroy_dev(ndev); |
| 428 | del_timer(&ndev->regen_timer); |
Sabrina Dubroca | 2a189f9 | 2015-11-04 14:47:53 +0100 | [diff] [blame] | 429 | snmp6_unregister_dev(ndev); |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 430 | goto err_release; |
| 431 | } |
David L Stevens | 30c4cf5 | 2007-01-04 12:31:14 -0800 | [diff] [blame] | 432 | /* protected by rtnl_lock */ |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 433 | rcu_assign_pointer(dev->ip6_ptr, ndev); |
YOSHIFUJI Hideaki | d88ae4c | 2007-01-14 21:48:40 -0800 | [diff] [blame] | 434 | |
Hannes Frederic Sowa | 2c5e893 | 2013-02-10 03:50:18 +0000 | [diff] [blame] | 435 | /* Join interface-local all-node multicast group */ |
| 436 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allnodes); |
| 437 | |
YOSHIFUJI Hideaki | d88ae4c | 2007-01-14 21:48:40 -0800 | [diff] [blame] | 438 | /* Join all-node multicast group */ |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 439 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
YOSHIFUJI Hideaki | d88ae4c | 2007-01-14 21:48:40 -0800 | [diff] [blame] | 440 | |
Li Wei | d6ddef9 | 2012-03-05 14:45:17 +0000 | [diff] [blame] | 441 | /* Join all-router multicast group if forwarding is set */ |
Li Wei | 8b2aaed | 2012-03-07 14:58:07 +0000 | [diff] [blame] | 442 | if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST)) |
Li Wei | d6ddef9 | 2012-03-05 14:45:17 +0000 | [diff] [blame] | 443 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
| 444 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | return ndev; |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 446 | |
| 447 | err_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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | } |
| 453 | |
Eldad Zack | 8e5e8f3 | 2012-04-01 07:49:08 +0000 | [diff] [blame] | 454 | static struct inet6_dev *ipv6_find_idev(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | { |
| 456 | struct inet6_dev *idev; |
| 457 | |
| 458 | ASSERT_RTNL(); |
| 459 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 460 | idev = __in6_dev_get(dev); |
| 461 | if (!idev) { |
| 462 | idev = ipv6_add_dev(dev); |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 463 | if (IS_ERR(idev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | return NULL; |
| 465 | } |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 466 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | if (dev->flags&IFF_UP) |
| 468 | ipv6_mc_up(idev); |
| 469 | return idev; |
| 470 | } |
| 471 | |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 472 | static int inet6_netconf_msgsize_devconf(int type) |
| 473 | { |
| 474 | int size = NLMSG_ALIGN(sizeof(struct netconfmsg)) |
| 475 | + nla_total_size(4); /* NETCONFA_IFINDEX */ |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 476 | bool all = false; |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 477 | |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 478 | if (type == NETCONFA_ALL) |
| 479 | all = true; |
| 480 | |
| 481 | if (all || type == NETCONFA_FORWARDING) |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 482 | size += nla_total_size(4); |
David S. Miller | b1afce9 | 2012-12-04 14:46:34 -0500 | [diff] [blame] | 483 | #ifdef CONFIG_IPV6_MROUTE |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 484 | if (all || type == NETCONFA_MC_FORWARDING) |
Nicolas Dichtel | d67b8c6 | 2012-12-04 01:13:35 +0000 | [diff] [blame] | 485 | size += nla_total_size(4); |
David S. Miller | b1afce9 | 2012-12-04 14:46:34 -0500 | [diff] [blame] | 486 | #endif |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 487 | if (all || type == NETCONFA_PROXY_NEIGH) |
stephen hemminger | c92d549 | 2013-12-17 22:37:14 -0800 | [diff] [blame] | 488 | size += nla_total_size(4); |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 489 | |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 490 | if (all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) |
Andy Gospodarek | 35103d1 | 2015-08-13 10:39:01 -0400 | [diff] [blame] | 491 | size += nla_total_size(4); |
| 492 | |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 493 | return size; |
| 494 | } |
| 495 | |
| 496 | static 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 Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 503 | bool all = false; |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 504 | |
| 505 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg), |
| 506 | flags); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 507 | if (!nlh) |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 508 | return -EMSGSIZE; |
| 509 | |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 510 | if (type == NETCONFA_ALL) |
| 511 | all = true; |
| 512 | |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 513 | 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 Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 519 | if ((all || type == NETCONFA_FORWARDING) && |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 520 | nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0) |
| 521 | goto nla_put_failure; |
David S. Miller | b1afce9 | 2012-12-04 14:46:34 -0500 | [diff] [blame] | 522 | #ifdef CONFIG_IPV6_MROUTE |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 523 | if ((all || type == NETCONFA_MC_FORWARDING) && |
Nicolas Dichtel | d67b8c6 | 2012-12-04 01:13:35 +0000 | [diff] [blame] | 524 | nla_put_s32(skb, NETCONFA_MC_FORWARDING, |
| 525 | devconf->mc_forwarding) < 0) |
| 526 | goto nla_put_failure; |
David S. Miller | b1afce9 | 2012-12-04 14:46:34 -0500 | [diff] [blame] | 527 | #endif |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 528 | if ((all || type == NETCONFA_PROXY_NEIGH) && |
stephen hemminger | c92d549 | 2013-12-17 22:37:14 -0800 | [diff] [blame] | 529 | nla_put_s32(skb, NETCONFA_PROXY_NEIGH, devconf->proxy_ndp) < 0) |
| 530 | goto nla_put_failure; |
| 531 | |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 532 | if ((all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) && |
Andy Gospodarek | 35103d1 | 2015-08-13 10:39:01 -0400 | [diff] [blame] | 533 | nla_put_s32(skb, NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, |
| 534 | devconf->ignore_routes_with_linkdown) < 0) |
| 535 | goto nla_put_failure; |
| 536 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 537 | nlmsg_end(skb, nlh); |
| 538 | return 0; |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 539 | |
| 540 | nla_put_failure: |
| 541 | nlmsg_cancel(skb, nlh); |
| 542 | return -EMSGSIZE; |
| 543 | } |
| 544 | |
Nicolas Dichtel | d67b8c6 | 2012-12-04 01:13:35 +0000 | [diff] [blame] | 545 | void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex, |
| 546 | struct ipv6_devconf *devconf) |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 547 | { |
| 548 | struct sk_buff *skb; |
| 549 | int err = -ENOBUFS; |
| 550 | |
| 551 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(type), GFP_ATOMIC); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 552 | if (!skb) |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 553 | 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; |
| 565 | errout: |
Cong Ding | bd77902 | 2012-12-18 12:08:56 +0000 | [diff] [blame] | 566 | rtnl_set_sk_err(net, RTNLGRP_IPV6_NETCONF, err); |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 567 | } |
| 568 | |
Nicolas Dichtel | 76f8f6c | 2012-10-25 22:28:51 +0000 | [diff] [blame] | 569 | static const struct nla_policy devconf_ipv6_policy[NETCONFA_MAX+1] = { |
| 570 | [NETCONFA_IFINDEX] = { .len = sizeof(int) }, |
| 571 | [NETCONFA_FORWARDING] = { .len = sizeof(int) }, |
stephen hemminger | c92d549 | 2013-12-17 22:37:14 -0800 | [diff] [blame] | 572 | [NETCONFA_PROXY_NEIGH] = { .len = sizeof(int) }, |
Andy Gospodarek | 35103d1 | 2015-08-13 10:39:01 -0400 | [diff] [blame] | 573 | [NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN] = { .len = sizeof(int) }, |
Nicolas Dichtel | 76f8f6c | 2012-10-25 22:28:51 +0000 | [diff] [blame] | 574 | }; |
| 575 | |
| 576 | static int inet6_netconf_get_devconf(struct sk_buff *in_skb, |
Thomas Graf | 661d296 | 2013-03-21 07:45:29 +0000 | [diff] [blame] | 577 | struct nlmsghdr *nlh) |
Nicolas Dichtel | 76f8f6c | 2012-10-25 22:28:51 +0000 | [diff] [blame] | 578 | { |
| 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 Protopopov | a97eb33 | 2016-02-16 21:43:16 -0500 | [diff] [blame] | 594 | err = -EINVAL; |
Nicolas Dichtel | 76f8f6c | 2012-10-25 22:28:51 +0000 | [diff] [blame] | 595 | 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 Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 608 | if (!dev) |
Nicolas Dichtel | 76f8f6c | 2012-10-25 22:28:51 +0000 | [diff] [blame] | 609 | goto errout; |
| 610 | in6_dev = __in6_dev_get(dev); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 611 | if (!in6_dev) |
Nicolas Dichtel | 76f8f6c | 2012-10-25 22:28:51 +0000 | [diff] [blame] | 612 | goto errout; |
| 613 | devconf = &in6_dev->cnf; |
| 614 | break; |
| 615 | } |
| 616 | |
| 617 | err = -ENOBUFS; |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 618 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(NETCONFA_ALL), GFP_ATOMIC); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 619 | if (!skb) |
Nicolas Dichtel | 76f8f6c | 2012-10-25 22:28:51 +0000 | [diff] [blame] | 620 | 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 Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 625 | NETCONFA_ALL); |
Nicolas Dichtel | 76f8f6c | 2012-10-25 22:28:51 +0000 | [diff] [blame] | 626 | 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); |
| 633 | errout: |
| 634 | return err; |
| 635 | } |
| 636 | |
Nicolas Dichtel | 7a67420 | 2013-03-05 23:42:06 +0000 | [diff] [blame] | 637 | static 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 Dichtel | 63998ac | 2013-03-22 06:28:43 +0000 | [diff] [blame] | 654 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ |
| 655 | net->dev_base_seq; |
Nicolas Dichtel | 7a67420 | 2013-03-05 23:42:06 +0000 | [diff] [blame] | 656 | 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 Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 669 | NETCONFA_ALL) < 0) { |
Nicolas Dichtel | 7a67420 | 2013-03-05 23:42:06 +0000 | [diff] [blame] | 670 | rcu_read_unlock(); |
| 671 | goto done; |
| 672 | } |
Nicolas Dichtel | 63998ac | 2013-03-22 06:28:43 +0000 | [diff] [blame] | 673 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
Nicolas Dichtel | 7a67420 | 2013-03-05 23:42:06 +0000 | [diff] [blame] | 674 | cont: |
| 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 Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 685 | NETCONFA_ALL) < 0) |
Nicolas Dichtel | 7a67420 | 2013-03-05 23:42:06 +0000 | [diff] [blame] | 686 | 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 Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 696 | NETCONFA_ALL) < 0) |
Nicolas Dichtel | 7a67420 | 2013-03-05 23:42:06 +0000 | [diff] [blame] | 697 | goto done; |
| 698 | else |
| 699 | h++; |
| 700 | } |
| 701 | done: |
| 702 | cb->args[0] = h; |
| 703 | cb->args[1] = idx; |
| 704 | |
| 705 | return skb->len; |
| 706 | } |
| 707 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | #ifdef CONFIG_SYSCTL |
| 709 | static void dev_forward_change(struct inet6_dev *idev) |
| 710 | { |
| 711 | struct net_device *dev; |
| 712 | struct inet6_ifaddr *ifa; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | |
| 714 | if (!idev) |
| 715 | return; |
| 716 | dev = idev->dev; |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 717 | if (idev->cnf.forwarding) |
| 718 | dev_disable_lro(dev); |
Amerigo Wang | 1a94083 | 2012-10-28 17:43:53 +0000 | [diff] [blame] | 719 | if (dev->flags & IFF_MULTICAST) { |
Hannes Frederic Sowa | 2c5e893 | 2013-02-10 03:50:18 +0000 | [diff] [blame] | 720 | if (idev->cnf.forwarding) { |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 721 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
Hannes Frederic Sowa | 2c5e893 | 2013-02-10 03:50:18 +0000 | [diff] [blame] | 722 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allrouters); |
| 723 | ipv6_dev_mc_inc(dev, &in6addr_sitelocal_allrouters); |
| 724 | } else { |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 725 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
Hannes Frederic Sowa | 2c5e893 | 2013-02-10 03:50:18 +0000 | [diff] [blame] | 726 | ipv6_dev_mc_dec(dev, &in6addr_interfacelocal_allrouters); |
| 727 | ipv6_dev_mc_dec(dev, &in6addr_sitelocal_allrouters); |
| 728 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | } |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 730 | |
| 731 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
Michal Wrobel | 2c12a74 | 2007-02-26 15:36:10 -0800 | [diff] [blame] | 732 | if (ifa->flags&IFA_F_TENTATIVE) |
| 733 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | if (idev->cnf.forwarding) |
| 735 | addrconf_join_anycast(ifa); |
| 736 | else |
| 737 | addrconf_leave_anycast(ifa); |
| 738 | } |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 739 | inet6_netconf_notify_devconf(dev_net(dev), NETCONFA_FORWARDING, |
| 740 | dev->ifindex, &idev->cnf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | } |
| 742 | |
| 743 | |
Pavel Emelyanov | e186932 | 2008-01-10 17:43:50 -0800 | [diff] [blame] | 744 | static void addrconf_forward_change(struct net *net, __s32 newf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | { |
| 746 | struct net_device *dev; |
| 747 | struct inet6_dev *idev; |
| 748 | |
Ben Hutchings | 4acd494 | 2012-08-14 08:54:51 +0000 | [diff] [blame] | 749 | for_each_netdev(net, dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | idev = __in6_dev_get(dev); |
| 751 | if (idev) { |
Pavel Emelyanov | e186932 | 2008-01-10 17:43:50 -0800 | [diff] [blame] | 752 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
| 753 | idev->cnf.forwarding = newf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | if (changed) |
| 755 | dev_forward_change(idev); |
| 756 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | } |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 759 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 760 | static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf) |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 761 | { |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 762 | struct net *net; |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 763 | int old; |
| 764 | |
| 765 | if (!rtnl_trylock()) |
| 766 | return restart_syscall(); |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 767 | |
| 768 | net = (struct net *)table->extra2; |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 769 | old = *p; |
| 770 | *p = newf; |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 771 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 772 | if (p == &net->ipv6.devconf_dflt->forwarding) { |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 773 | if ((!newf) ^ (!old)) |
| 774 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, |
| 775 | NETCONFA_IFINDEX_DEFAULT, |
| 776 | net->ipv6.devconf_dflt); |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 777 | rtnl_unlock(); |
| 778 | return 0; |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 779 | } |
Stephen Hemminger | b325fdd | 2009-02-26 06:55:31 +0000 | [diff] [blame] | 780 | |
Pavel Emelyanov | e186932 | 2008-01-10 17:43:50 -0800 | [diff] [blame] | 781 | if (p == &net->ipv6.devconf_all->forwarding) { |
Pavel Emelyanov | e186932 | 2008-01-10 17:43:50 -0800 | [diff] [blame] | 782 | net->ipv6.devconf_dflt->forwarding = newf; |
| 783 | addrconf_forward_change(net, newf); |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 784 | if ((!newf) ^ (!old)) |
| 785 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, |
| 786 | NETCONFA_IFINDEX_ALL, |
| 787 | net->ipv6.devconf_all); |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 788 | } else if ((!newf) ^ (!old)) |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 789 | dev_forward_change((struct inet6_dev *)table->extra1); |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 790 | rtnl_unlock(); |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 791 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 792 | if (newf) |
Daniel Lezcano | 7b4da53 | 2008-03-04 13:47:14 -0800 | [diff] [blame] | 793 | rt6_purge_dflt_routers(net); |
Stephen Hemminger | b325fdd | 2009-02-26 06:55:31 +0000 | [diff] [blame] | 794 | return 1; |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 795 | } |
Andy Gospodarek | 35103d1 | 2015-08-13 10:39:01 -0400 | [diff] [blame] | 796 | |
| 797 | static 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 | |
| 817 | static 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | #endif |
| 854 | |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 855 | /* Nobody refers to this ifaddr, destroy it */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) |
| 857 | { |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 858 | WARN_ON(!hlist_unhashed(&ifp->addr_lst)); |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 859 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | #ifdef NET_REFCNT_DEBUG |
Joe Perches | 91df42b | 2012-05-15 14:11:54 +0000 | [diff] [blame] | 861 | pr_debug("%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | #endif |
| 863 | |
| 864 | in6_dev_put(ifp->idev); |
| 865 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 866 | if (cancel_delayed_work(&ifp->dad_work)) |
| 867 | pr_notice("delayed DAD work was pending while freeing ifa=%p\n", |
| 868 | ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | |
Herbert Xu | e9d3e08 | 2010-05-18 15:36:06 -0700 | [diff] [blame] | 870 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 871 | pr_warn("Freeing alive inet6 address %p\n", ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | return; |
| 873 | } |
Amerigo Wang | 94e187c | 2012-10-29 00:13:19 +0000 | [diff] [blame] | 874 | ip6_rt_put(ifp->rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | |
Lai Jiangshan | e578598 | 2011-03-15 18:00:14 +0800 | [diff] [blame] | 876 | kfree_rcu(ifp, rcu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | } |
| 878 | |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 879 | static void |
| 880 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) |
| 881 | { |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 882 | struct list_head *p; |
YOSHIFUJI Hideaki | 8a6ce0c | 2006-07-11 13:05:30 -0700 | [diff] [blame] | 883 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 884 | |
| 885 | /* |
| 886 | * Each device address list is sorted in order of scope - |
| 887 | * global before linklocal. |
| 888 | */ |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 889 | list_for_each(p, &idev->addr_list) { |
| 890 | struct inet6_ifaddr *ifa |
| 891 | = list_entry(p, struct inet6_ifaddr, if_list); |
YOSHIFUJI Hideaki | 8a6ce0c | 2006-07-11 13:05:30 -0700 | [diff] [blame] | 892 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 893 | break; |
| 894 | } |
| 895 | |
David S. Miller | b54c9b9 | 2010-03-25 21:25:30 -0700 | [diff] [blame] | 896 | list_add_tail(&ifp->if_list, p); |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 897 | } |
| 898 | |
Eric Dumazet | ddbe503 | 2012-07-18 08:11:12 +0000 | [diff] [blame] | 899 | static u32 inet6_addr_hash(const struct in6_addr *addr) |
YOSHIFUJI Hideaki | 3eb84f4 | 2008-04-10 15:42:08 +0900 | [diff] [blame] | 900 | { |
Eric Dumazet | ddbe503 | 2012-07-18 08:11:12 +0000 | [diff] [blame] | 901 | return hash_32(ipv6_addr_hash(addr), IN6_ADDR_HSIZE_SHIFT); |
YOSHIFUJI Hideaki | 3eb84f4 | 2008-04-10 15:42:08 +0900 | [diff] [blame] | 902 | } |
| 903 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | /* On success it returns ifp with increased reference count */ |
| 905 | |
| 906 | static struct inet6_ifaddr * |
Jiri Pirko | 3f8f529 | 2013-08-01 10:41:27 +0200 | [diff] [blame] | 907 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
| 908 | const struct in6_addr *peer_addr, int pfxlen, |
Jiri Benc | 8a226b2 | 2013-08-01 10:41:28 +0200 | [diff] [blame] | 909 | int scope, u32 flags, u32 valid_lft, u32 prefered_lft) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | { |
| 911 | struct inet6_ifaddr *ifa = NULL; |
| 912 | struct rt6_info *rt; |
stephen hemminger | 3a88a81 | 2010-03-17 20:31:12 +0000 | [diff] [blame] | 913 | unsigned int hash; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | int err = 0; |
YOSHIFUJI Hideaki | d68b827 | 2008-06-25 16:26:47 +0900 | [diff] [blame] | 915 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 923 | rcu_read_lock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | if (idev->dead) { |
| 925 | err = -ENODEV; /*XXX*/ |
| 926 | goto out2; |
| 927 | } |
| 928 | |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 929 | if (idev->cnf.disable_ipv6) { |
Brian Haley | 9bdd8d4 | 2009-03-18 18:22:48 -0700 | [diff] [blame] | 930 | err = -EACCES; |
| 931 | goto out2; |
| 932 | } |
| 933 | |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 934 | spin_lock(&addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | |
| 936 | /* Ignore adding duplicate addresses on an interface */ |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 937 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
dingtianhong | ba3542e | 2013-08-17 10:27:04 +0800 | [diff] [blame] | 938 | ADBG("ipv6_add_addr: already assigned\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | err = -EEXIST; |
| 940 | goto out; |
| 941 | } |
| 942 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 943 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 944 | |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 945 | if (!ifa) { |
dingtianhong | ba3542e | 2013-08-17 10:27:04 +0800 | [diff] [blame] | 946 | ADBG("ipv6_add_addr: malloc failed\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | err = -ENOBUFS; |
| 948 | goto out; |
| 949 | } |
| 950 | |
David S. Miller | 8f03151 | 2011-12-06 16:48:14 -0500 | [diff] [blame] | 951 | rt = addrconf_dst_alloc(idev, addr, false); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | if (IS_ERR(rt)) { |
| 953 | err = PTR_ERR(rt); |
| 954 | goto out; |
| 955 | } |
| 956 | |
Jiri Pirko | bba2489 | 2013-12-07 19:26:57 +0100 | [diff] [blame] | 957 | neigh_parms_data_state_setall(idev->nd_parms); |
| 958 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 959 | ifa->addr = *addr; |
Jiri Pirko | 3f8f529 | 2013-08-01 10:41:27 +0200 | [diff] [blame] | 960 | if (peer_addr) |
| 961 | ifa->peer_addr = *peer_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | |
| 963 | spin_lock_init(&ifa->lock); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 964 | INIT_DELAYED_WORK(&ifa->dad_work, addrconf_dad_work); |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 965 | INIT_HLIST_NODE(&ifa->addr_lst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | ifa->scope = scope; |
| 967 | ifa->prefix_len = pfxlen; |
| 968 | ifa->flags = flags | IFA_F_TENTATIVE; |
Jiri Benc | 8a226b2 | 2013-08-01 10:41:28 +0200 | [diff] [blame] | 969 | ifa->valid_lft = valid_lft; |
| 970 | ifa->prefered_lft = prefered_lft; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | ifa->cstamp = ifa->tstamp = jiffies; |
Daniel Borkmann | 617fe29 | 2013-04-09 03:47:16 +0000 | [diff] [blame] | 972 | ifa->tokenized = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | |
Keir Fraser | 57f5f54 | 2006-08-29 02:43:49 -0700 | [diff] [blame] | 974 | ifa->rt = rt; |
| 975 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | ifa->idev = idev; |
| 977 | in6_dev_hold(idev); |
| 978 | /* For caller */ |
| 979 | in6_ifa_hold(ifa); |
| 980 | |
| 981 | /* Add to big hash table */ |
Eric Dumazet | ddbe503 | 2012-07-18 08:11:12 +0000 | [diff] [blame] | 982 | hash = inet6_addr_hash(addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 984 | hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]); |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 985 | spin_unlock(&addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | |
| 987 | write_lock(&idev->lock); |
| 988 | /* Add to inet6_dev unicast addr list. */ |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 989 | ipv6_link_dev_addr(idev, ifa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | if (ifa->flags&IFA_F_TEMPORARY) { |
stephen hemminger | 372e6c8 | 2010-03-17 20:31:09 +0000 | [diff] [blame] | 992 | list_add(&ifa->tmp_list, &idev->tempaddr_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | in6_ifa_hold(ifa); |
| 994 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | in6_ifa_hold(ifa); |
| 997 | write_unlock(&idev->lock); |
| 998 | out2: |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 999 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | |
YOSHIFUJI Hideaki | fd92833 | 2005-04-19 22:27:09 -0700 | [diff] [blame] | 1001 | if (likely(err == 0)) |
Cong Wang | f88c91d | 2013-04-14 23:18:43 +0800 | [diff] [blame] | 1002 | inet6addr_notifier_call_chain(NETDEV_UP, ifa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | else { |
| 1004 | kfree(ifa); |
| 1005 | ifa = ERR_PTR(err); |
| 1006 | } |
| 1007 | |
| 1008 | return ifa; |
| 1009 | out: |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 1010 | spin_unlock(&addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | goto out2; |
| 1012 | } |
| 1013 | |
Thomas Haller | 5b84efe | 2014-01-15 15:36:59 +0100 | [diff] [blame] | 1014 | enum 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 | **/ |
| 1038 | static enum cleanup_prefix_rt_t |
| 1039 | check_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 | |
| 1075 | static void |
| 1076 | cleanup_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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | /* This function wants to get referenced ifp and releases it before return */ |
| 1097 | |
| 1098 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) |
| 1099 | { |
Herbert Xu | 4c5ff6a | 2010-05-18 15:54:18 -0700 | [diff] [blame] | 1100 | int state; |
Thomas Haller | 5b84efe | 2014-01-15 15:36:59 +0100 | [diff] [blame] | 1101 | enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_NOP; |
| 1102 | unsigned long expires; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 1104 | ASSERT_RTNL(); |
| 1105 | |
Hannes Frederic Sowa | 8e8e676 | 2015-03-23 23:36:03 +0100 | [diff] [blame] | 1106 | spin_lock_bh(&ifp->lock); |
Herbert Xu | 4c5ff6a | 2010-05-18 15:54:18 -0700 | [diff] [blame] | 1107 | state = ifp->state; |
Herbert Xu | e9d3e08 | 2010-05-18 15:36:06 -0700 | [diff] [blame] | 1108 | ifp->state = INET6_IFADDR_STATE_DEAD; |
Hannes Frederic Sowa | 8e8e676 | 2015-03-23 23:36:03 +0100 | [diff] [blame] | 1109 | spin_unlock_bh(&ifp->lock); |
Herbert Xu | 4c5ff6a | 2010-05-18 15:54:18 -0700 | [diff] [blame] | 1110 | |
| 1111 | if (state == INET6_IFADDR_STATE_DEAD) |
| 1112 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 1114 | spin_lock_bh(&addrconf_hash_lock); |
| 1115 | hlist_del_init_rcu(&ifp->addr_lst); |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 1116 | spin_unlock_bh(&addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | |
Thomas Haller | 5b84efe | 2014-01-15 15:36:59 +0100 | [diff] [blame] | 1118 | write_lock_bh(&ifp->idev->lock); |
David S. Miller | 5d9efa7 | 2013-10-28 20:07:50 -0400 | [diff] [blame] | 1119 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | if (ifp->flags&IFA_F_TEMPORARY) { |
stephen hemminger | 372e6c8 | 2010-03-17 20:31:09 +0000 | [diff] [blame] | 1121 | list_del(&ifp->tmp_list); |
| 1122 | if (ifp->ifpub) { |
| 1123 | in6_ifa_put(ifp->ifpub); |
| 1124 | ifp->ifpub = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | } |
stephen hemminger | 372e6c8 | 2010-03-17 20:31:09 +0000 | [diff] [blame] | 1126 | __in6_ifa_put(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1128 | |
Thomas Haller | 5b84efe | 2014-01-15 15:36:59 +0100 | [diff] [blame] | 1129 | if (ifp->flags & IFA_F_PERMANENT && !(ifp->flags & IFA_F_NOPREFIXROUTE)) |
| 1130 | action = check_cleanup_prefix_route(ifp, &expires); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 1131 | |
Thomas Haller | 5b84efe | 2014-01-15 15:36:59 +0100 | [diff] [blame] | 1132 | list_del_init(&ifp->if_list); |
| 1133 | __in6_ifa_put(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | |
Thomas Haller | 5b84efe | 2014-01-15 15:36:59 +0100 | [diff] [blame] | 1135 | write_unlock_bh(&ifp->idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 1137 | addrconf_del_dad_work(ifp); |
Andrey Vagin | b223856 | 2008-07-08 15:13:31 -0700 | [diff] [blame] | 1138 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
| 1140 | |
Cong Wang | f88c91d | 2013-04-14 23:18:43 +0800 | [diff] [blame] | 1141 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | |
Thomas Haller | 5b84efe | 2014-01-15 15:36:59 +0100 | [diff] [blame] | 1143 | if (action != CLEANUP_PREFIX_RT_NOP) { |
| 1144 | cleanup_prefix_route(ifp, expires, |
| 1145 | action == CLEANUP_PREFIX_RT_DEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | } |
| 1147 | |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 1148 | /* clean up prefsrc entries */ |
| 1149 | rt6_remove_prefsrc(ifp); |
Herbert Xu | 4c5ff6a | 2010-05-18 15:54:18 -0700 | [diff] [blame] | 1150 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | in6_ifa_put(ifp); |
| 1152 | } |
| 1153 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | static 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 Colitti | 76f793e | 2011-07-26 13:50:49 +0000 | [diff] [blame] | 1158 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age; |
Benoit Boissinot | eac55bf | 2008-04-02 00:01:35 -0700 | [diff] [blame] | 1159 | unsigned long regen_advance; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | int tmp_plen; |
| 1161 | int ret = 0; |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1162 | u32 addr_flags; |
Lorenzo Colitti | 76f793e | 2011-07-26 13:50:49 +0000 | [diff] [blame] | 1163 | unsigned long now = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1164 | |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 1165 | write_lock_bh(&idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1166 | 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 | } |
| 1174 | retry: |
| 1175 | in6_dev_hold(idev); |
| 1176 | if (idev->cnf.use_tempaddr <= 0) { |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 1177 | write_unlock_bh(&idev->lock); |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 1178 | pr_info("%s: use_tempaddr is disabled\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | 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 Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 1187 | write_unlock_bh(&idev->lock); |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 1188 | pr_warn("%s: regeneration time exceeded - disabled temporary address support\n", |
| 1189 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1190 | 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 Dumitru | eb7e057 | 2012-08-30 02:01:45 +0000 | [diff] [blame] | 1196 | __ipv6_try_regen_rndid(idev, tmpaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | memcpy(&addr.s6_addr[8], idev->rndid, 8); |
Lorenzo Colitti | 76f793e | 2011-07-26 13:50:49 +0000 | [diff] [blame] | 1198 | age = (now - ifp->tstamp) / HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1199 | tmp_valid_lft = min_t(__u32, |
| 1200 | ifp->valid_lft, |
Glenn Wurster | 7a876b0 | 2010-09-27 07:10:10 +0000 | [diff] [blame] | 1201 | idev->cnf.temp_valid_lft + age); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1202 | tmp_prefered_lft = min_t(__u32, |
| 1203 | ifp->prefered_lft, |
Glenn Wurster | 7a876b0 | 2010-09-27 07:10:10 +0000 | [diff] [blame] | 1204 | idev->cnf.temp_prefered_lft + age - |
Ben Hutchings | 784e271 | 2010-06-26 11:42:55 +0000 | [diff] [blame] | 1205 | idev->cnf.max_desync_factor); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1206 | tmp_plen = ifp->prefix_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1207 | tmp_tstamp = ifp->tstamp; |
| 1208 | spin_unlock_bh(&ifp->lock); |
| 1209 | |
Benoit Boissinot | eac55bf | 2008-04-02 00:01:35 -0700 | [diff] [blame] | 1210 | regen_advance = idev->cnf.regen_max_retry * |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 1211 | idev->cnf.dad_transmits * |
| 1212 | NEIGH_VAR(idev->nd_parms, RETRANS_TIME) / HZ; |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 1213 | write_unlock_bh(&idev->lock); |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1214 | |
Benoit Boissinot | eac55bf | 2008-04-02 00:01:35 -0700 | [diff] [blame] | 1215 | /* 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 Kallweit | ecab670 | 2014-03-12 22:13:19 +0100 | [diff] [blame] | 1219 | * Use age calculation as in addrconf_verify to avoid unnecessary |
| 1220 | * temporary addresses being generated. |
Benoit Boissinot | eac55bf | 2008-04-02 00:01:35 -0700 | [diff] [blame] | 1221 | */ |
Heiner Kallweit | ecab670 | 2014-03-12 22:13:19 +0100 | [diff] [blame] | 1222 | age = (now - tmp_tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; |
| 1223 | if (tmp_prefered_lft <= regen_advance + age) { |
Benoit Boissinot | eac55bf | 2008-04-02 00:01:35 -0700 | [diff] [blame] | 1224 | in6_ifa_put(ifp); |
| 1225 | in6_dev_put(idev); |
| 1226 | ret = -1; |
| 1227 | goto out; |
| 1228 | } |
| 1229 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1230 | 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 Sowa | 4b08a8f | 2013-08-16 13:02:27 +0200 | [diff] [blame] | 1235 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | in6_ifa_put(ifp); |
| 1240 | in6_dev_put(idev); |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 1241 | pr_info("%s: retry temporary address regeneration\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | tmpaddr = &addr; |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 1243 | write_lock_bh(&idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | goto retry; |
| 1245 | } |
| 1246 | |
| 1247 | spin_lock_bh(&ift->lock); |
| 1248 | ift->ifpub = ifp; |
Lorenzo Colitti | 76f793e | 2011-07-26 13:50:49 +0000 | [diff] [blame] | 1249 | ift->cstamp = now; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1250 | ift->tstamp = tmp_tstamp; |
| 1251 | spin_unlock_bh(&ift->lock); |
| 1252 | |
David S. Miller | cf22f9a | 2012-04-14 21:37:40 -0400 | [diff] [blame] | 1253 | addrconf_dad_start(ift); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | in6_ifa_put(ift); |
| 1255 | in6_dev_put(idev); |
| 1256 | out: |
| 1257 | return ret; |
| 1258 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | |
| 1260 | /* |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1261 | * Choose an appropriate source address (RFC3484) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | */ |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1263 | enum { |
| 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 Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1273 | IPV6_SADDR_RULE_PRIVACY, |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1274 | IPV6_SADDR_RULE_ORCHID, |
| 1275 | IPV6_SADDR_RULE_PREFIX, |
Erik Kline | 7fd2561 | 2014-10-28 18:11:14 +0900 | [diff] [blame] | 1276 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 1277 | IPV6_SADDR_RULE_NOT_OPTIMISTIC, |
| 1278 | #endif |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1279 | IPV6_SADDR_RULE_MAX |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1280 | }; |
| 1281 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1282 | struct 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 | |
| 1291 | struct ipv6_saddr_dst { |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 1292 | const struct in6_addr *addr; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1293 | int ifindex; |
| 1294 | int scope; |
| 1295 | int label; |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1296 | unsigned int prefs; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1297 | }; |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1298 | |
Dave Jones | b6f99a2 | 2007-03-22 12:27:49 -0700 | [diff] [blame] | 1299 | static inline int ipv6_saddr_preferred(int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1300 | { |
Ulrich Weber | 45bb006 | 2010-02-25 23:28:58 +0000 | [diff] [blame] | 1301 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK)) |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1302 | return 1; |
| 1303 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | } |
| 1305 | |
Erik Kline | 7fd2561 | 2014-10-28 18:11:14 +0900 | [diff] [blame] | 1306 | static 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 Thery | 3de2325 | 2008-05-28 14:51:24 +0200 | [diff] [blame] | 1315 | static int ipv6_get_saddr_eval(struct net *net, |
| 1316 | struct ipv6_saddr_score *score, |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1317 | 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 hemminger | db9c7c3 | 2014-01-12 11:26:32 -0800 | [diff] [blame] | 1356 | * B-15 | \ if scope is enough for destination. |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1357 | * | 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 Kline | 7fd2561 | 2014-10-28 18:11:14 +0900 | [diff] [blame] | 1375 | { |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1376 | /* Rule 3: Avoid deprecated and optimistic addresses */ |
Erik Kline | 7fd2561 | 2014-10-28 18:11:14 +0900 | [diff] [blame] | 1377 | u8 avoid = IFA_F_DEPRECATED; |
| 1378 | |
| 1379 | if (!ipv6_use_optimistic_addr(score->ifa->idev)) |
| 1380 | avoid |= IFA_F_OPTIMISTIC; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1381 | ret = ipv6_saddr_preferred(score->addr_type) || |
Erik Kline | 7fd2561 | 2014-10-28 18:11:14 +0900 | [diff] [blame] | 1382 | !(score->ifa->flags & avoid); |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1383 | break; |
Erik Kline | 7fd2561 | 2014-10-28 18:11:14 +0900 | [diff] [blame] | 1384 | } |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1385 | #ifdef CONFIG_IPV6_MIP6 |
| 1386 | case IPV6_SADDR_RULE_HOA: |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1387 | { |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1388 | /* Rule 4: Prefer home address */ |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1389 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
| 1390 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1391 | break; |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1392 | } |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1393 | #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 Thery | 3de2325 | 2008-05-28 14:51:24 +0200 | [diff] [blame] | 1401 | ret = ipv6_addr_label(net, |
| 1402 | &score->ifa->addr, score->addr_type, |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1403 | score->ifa->idev->dev->ifindex) == dst->label; |
| 1404 | break; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1405 | case IPV6_SADDR_RULE_PRIVACY: |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1406 | { |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1407 | /* Rule 7: Prefer public address |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1408 | * Note: prefer temporary address if use_tempaddr >= 2 |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1409 | */ |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1410 | 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 Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1414 | break; |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1415 | } |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1416 | 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 | 91b4b04 | 2012-09-10 18:41:07 +0000 | [diff] [blame] | 1425 | 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 Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1429 | break; |
Erik Kline | 7fd2561 | 2014-10-28 18:11:14 +0900 | [diff] [blame] | 1430 | #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 Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1438 | default: |
| 1439 | ret = 0; |
| 1440 | } |
| 1441 | |
| 1442 | if (ret) |
| 1443 | __set_bit(i, score->scorebits); |
| 1444 | score->rule = i; |
| 1445 | out: |
| 1446 | return ret; |
| 1447 | } |
| 1448 | |
YOSHIFUJI Hideaki/吉藤英明 | c0b8da1 | 2015-07-13 23:28:10 +0900 | [diff] [blame] | 1449 | static int __ipv6_dev_get_saddr(struct net *net, |
| 1450 | struct ipv6_saddr_dst *dst, |
YOSHIFUJI Hideaki/吉藤英明 | c0b8da1 | 2015-07-13 23:28:10 +0900 | [diff] [blame] | 1451 | struct inet6_dev *idev, |
| 1452 | struct ipv6_saddr_score *scores, |
| 1453 | int hiscore_idx) |
YOSHIFUJI Hideaki/吉藤英明 | 9131f3d | 2015-07-10 16:58:31 +0900 | [diff] [blame] | 1454 | { |
YOSHIFUJI Hideaki/吉藤英明 | c0b8da1 | 2015-07-13 23:28:10 +0900 | [diff] [blame] | 1455 | struct ipv6_saddr_score *score = &scores[1 - hiscore_idx], *hiscore = &scores[hiscore_idx]; |
YOSHIFUJI Hideaki/吉藤英明 | 9131f3d | 2015-07-10 16:58:31 +0900 | [diff] [blame] | 1456 | |
| 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 | c0b8da1 | 2015-07-13 23:28:10 +0900 | [diff] [blame] | 1514 | hiscore_idx = 1 - hiscore_idx; |
YOSHIFUJI Hideaki/吉藤英明 | 9131f3d | 2015-07-10 16:58:31 +0900 | [diff] [blame] | 1515 | |
| 1516 | /* restore our iterator */ |
| 1517 | score->ifa = hiscore->ifa; |
| 1518 | |
| 1519 | break; |
| 1520 | } |
| 1521 | } |
| 1522 | } |
| 1523 | out: |
| 1524 | read_unlock_bh(&idev->lock); |
YOSHIFUJI Hideaki/吉藤英明 | c0b8da1 | 2015-07-13 23:28:10 +0900 | [diff] [blame] | 1525 | return hiscore_idx; |
YOSHIFUJI Hideaki/吉藤英明 | 9131f3d | 2015-07-10 16:58:31 +0900 | [diff] [blame] | 1526 | } |
| 1527 | |
Patrick McHardy | b3f644f | 2012-08-26 19:14:14 +0200 | [diff] [blame] | 1528 | int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev, |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 1529 | const struct in6_addr *daddr, unsigned int prefs, |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1530 | struct in6_addr *saddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1531 | { |
YOSHIFUJI Hideaki/吉藤英明 | c0b8da1 | 2015-07-13 23:28:10 +0900 | [diff] [blame] | 1532 | struct ipv6_saddr_score scores[2], *hiscore; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1533 | struct ipv6_saddr_dst dst; |
YOSHIFUJI Hideaki/吉藤英明 | 9131f3d | 2015-07-10 16:58:31 +0900 | [diff] [blame] | 1534 | struct inet6_dev *idev; |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1535 | struct net_device *dev; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1536 | int dst_type; |
YOSHIFUJI Hideaki/吉藤英明 | 9131f3d | 2015-07-10 16:58:31 +0900 | [diff] [blame] | 1537 | bool use_oif_addr = false; |
YOSHIFUJI Hideaki/吉藤英明 | c0b8da1 | 2015-07-13 23:28:10 +0900 | [diff] [blame] | 1538 | int hiscore_idx = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1539 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1540 | 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 Thery | 3de2325 | 2008-05-28 14:51:24 +0200 | [diff] [blame] | 1544 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1545 | dst.prefs = prefs; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1546 | |
YOSHIFUJI Hideaki/吉藤英明 | c0b8da1 | 2015-07-13 23:28:10 +0900 | [diff] [blame] | 1547 | scores[hiscore_idx].rule = -1; |
| 1548 | scores[hiscore_idx].ifa = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1549 | |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1550 | rcu_read_lock(); |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1551 | |
YOSHIFUJI Hideaki/吉藤英明 | 9131f3d | 2015-07-10 16:58:31 +0900 | [diff] [blame] | 1552 | /* 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 Kline | 3985e8a | 2015-07-22 16:38:25 +0900 | [diff] [blame] | 1563 | * - "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 | 9131f3d | 2015-07-10 16:58:31 +0900 | [diff] [blame] | 1567 | */ |
| 1568 | if (dst_dev) { |
Erik Kline | 3985e8a | 2015-07-22 16:38:25 +0900 | [diff] [blame] | 1569 | idev = __in6_dev_get(dst_dev); |
YOSHIFUJI Hideaki/吉藤英明 | 9131f3d | 2015-07-10 16:58:31 +0900 | [diff] [blame] | 1570 | if ((dst_type & IPV6_ADDR_MULTICAST) || |
Erik Kline | 3985e8a | 2015-07-22 16:38:25 +0900 | [diff] [blame] | 1571 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL || |
| 1572 | (idev && idev->cnf.use_oif_addrs_only)) { |
YOSHIFUJI Hideaki/吉藤英明 | 9131f3d | 2015-07-10 16:58:31 +0900 | [diff] [blame] | 1573 | use_oif_addr = true; |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1574 | } |
YOSHIFUJI Hideaki/吉藤英明 | 9131f3d | 2015-07-10 16:58:31 +0900 | [diff] [blame] | 1575 | } |
| 1576 | |
| 1577 | if (use_oif_addr) { |
YOSHIFUJI Hideaki/吉藤英明 | c0b8da1 | 2015-07-13 23:28:10 +0900 | [diff] [blame] | 1578 | if (idev) |
YOSHIFUJI Hideaki | c15df30 | 2015-07-16 16:51:30 +0900 | [diff] [blame] | 1579 | hiscore_idx = __ipv6_dev_get_saddr(net, &dst, idev, scores, hiscore_idx); |
YOSHIFUJI Hideaki/吉藤英明 | 9131f3d | 2015-07-10 16:58:31 +0900 | [diff] [blame] | 1580 | } else { |
| 1581 | for_each_netdev_rcu(net, dev) { |
| 1582 | idev = __in6_dev_get(dev); |
| 1583 | if (!idev) |
| 1584 | continue; |
YOSHIFUJI Hideaki | c15df30 | 2015-07-16 16:51:30 +0900 | [diff] [blame] | 1585 | hiscore_idx = __ipv6_dev_get_saddr(net, &dst, idev, scores, hiscore_idx); |
YOSHIFUJI Hideaki/吉藤英明 | 9131f3d | 2015-07-10 16:58:31 +0900 | [diff] [blame] | 1586 | } |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1587 | } |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1588 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | |
YOSHIFUJI Hideaki/吉藤英明 | c0b8da1 | 2015-07-13 23:28:10 +0900 | [diff] [blame] | 1590 | hiscore = &scores[hiscore_idx]; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1591 | if (!hiscore->ifa) |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1592 | return -EADDRNOTAVAIL; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1593 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1594 | *saddr = hiscore->ifa->addr; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1595 | in6_ifa_put(hiscore->ifa); |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1596 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1597 | } |
YOSHIFUJI Hideaki | 5e5f3f0 | 2008-03-03 21:44:34 +0900 | [diff] [blame] | 1598 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1599 | |
Amerigo Wang | 8965779 | 2013-06-29 21:30:49 +0800 | [diff] [blame] | 1600 | int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, |
Jiri Pirko | 479840f | 2013-12-06 09:45:21 +0100 | [diff] [blame] | 1601 | u32 banned_flags) |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 1602 | { |
| 1603 | struct inet6_ifaddr *ifp; |
| 1604 | int err = -EADDRNOTAVAIL; |
| 1605 | |
Hannes Frederic Sowa | 602582c | 2014-01-19 21:58:19 +0100 | [diff] [blame] | 1606 | list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) { |
| 1607 | if (ifp->scope > IFA_LINK) |
| 1608 | break; |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 1609 | 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 Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1619 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
Jiri Pirko | 479840f | 2013-12-06 09:45:21 +0100 | [diff] [blame] | 1620 | u32 banned_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1621 | { |
| 1622 | struct inet6_dev *idev; |
| 1623 | int err = -EADDRNOTAVAIL; |
| 1624 | |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1625 | rcu_read_lock(); |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 1626 | idev = __in6_dev_get(dev); |
| 1627 | if (idev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1628 | read_lock_bh(&idev->lock); |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 1629 | err = __ipv6_get_lladdr(idev, addr, banned_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1630 | read_unlock_bh(&idev->lock); |
| 1631 | } |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1632 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1633 | return err; |
| 1634 | } |
| 1635 | |
| 1636 | static 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 hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 1642 | list_for_each_entry(ifp, &idev->addr_list, if_list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | cnt++; |
| 1644 | read_unlock_bh(&idev->lock); |
| 1645 | return cnt; |
| 1646 | } |
| 1647 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1648 | int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
Florian Westphal | 2a7851b | 2013-05-17 03:56:10 +0000 | [diff] [blame] | 1649 | const struct net_device *dev, int strict) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1650 | { |
Erik Kline | c58da4c | 2015-02-04 20:01:23 +0900 | [diff] [blame] | 1651 | return ipv6_chk_addr_and_flags(net, addr, dev, strict, IFA_F_TENTATIVE); |
| 1652 | } |
| 1653 | EXPORT_SYMBOL(ipv6_chk_addr); |
| 1654 | |
| 1655 | int 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 Hemminger | eedf042 | 2010-05-17 22:27:12 -0700 | [diff] [blame] | 1659 | struct inet6_ifaddr *ifp; |
Eric Dumazet | ddbe503 | 2012-07-18 08:11:12 +0000 | [diff] [blame] | 1660 | unsigned int hash = inet6_addr_hash(addr); |
Erik Kline | c58da4c | 2015-02-04 20:01:23 +0900 | [diff] [blame] | 1661 | u32 ifp_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1662 | |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 1663 | rcu_read_lock_bh(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1664 | hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) { |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 1665 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
Daniel Lezcano | bfeade0 | 2008-01-10 22:43:18 -0800 | [diff] [blame] | 1666 | continue; |
Erik Kline | c58da4c | 2015-02-04 20:01:23 +0900 | [diff] [blame] | 1667 | /* 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1673 | if (ipv6_addr_equal(&ifp->addr, addr) && |
Erik Kline | c58da4c | 2015-02-04 20:01:23 +0900 | [diff] [blame] | 1674 | !(ifp_flags&banned_flags) && |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 1675 | (!dev || ifp->idev->dev == dev || |
Stephen Hemminger | eedf042 | 2010-05-17 22:27:12 -0700 | [diff] [blame] | 1676 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) { |
| 1677 | rcu_read_unlock_bh(); |
| 1678 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1679 | } |
| 1680 | } |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 1681 | |
Stephen Hemminger | eedf042 | 2010-05-17 22:27:12 -0700 | [diff] [blame] | 1682 | rcu_read_unlock_bh(); |
| 1683 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1684 | } |
Erik Kline | c58da4c | 2015-02-04 20:01:23 +0900 | [diff] [blame] | 1685 | EXPORT_SYMBOL(ipv6_chk_addr_and_flags); |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 1686 | |
David S. Miller | 3e81c6d | 2010-03-20 16:18:00 -0700 | [diff] [blame] | 1687 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
| 1688 | struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1689 | { |
Eric Dumazet | ddbe503 | 2012-07-18 08:11:12 +0000 | [diff] [blame] | 1690 | unsigned int hash = inet6_addr_hash(addr); |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 1691 | struct inet6_ifaddr *ifp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1692 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1693 | hlist_for_each_entry(ifp, &inet6_addr_lst[hash], addr_lst) { |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 1694 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
Daniel Lezcano | 06bfe65 | 2008-01-10 22:43:42 -0800 | [diff] [blame] | 1695 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1696 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 1697 | if (!dev || ifp->idev->dev == dev) |
David S. Miller | 3e81c6d | 2010-03-20 16:18:00 -0700 | [diff] [blame] | 1698 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1699 | } |
| 1700 | } |
David S. Miller | 3e81c6d | 2010-03-20 16:18:00 -0700 | [diff] [blame] | 1701 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1702 | } |
| 1703 | |
Catalin\(ux\) M. BOIE | 7df37ff | 2013-09-23 23:04:19 +0300 | [diff] [blame] | 1704 | /* Compares an address/prefix_len with addresses on device @dev. |
| 1705 | * If one is found it returns true. |
| 1706 | */ |
| 1707 | bool 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 | } |
| 1729 | EXPORT_SYMBOL(ipv6_chk_custom_prefix); |
| 1730 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1731 | int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev) |
YOSHIFUJI Hideaki | 52eeeb8 | 2008-03-15 22:54:23 -0400 | [diff] [blame] | 1732 | { |
| 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 hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 1742 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
YOSHIFUJI Hideaki | 52eeeb8 | 2008-03-15 22:54:23 -0400 | [diff] [blame] | 1743 | 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 Hideaki | 52eeeb8 | 2008-03-15 22:54:23 -0400 | [diff] [blame] | 1753 | EXPORT_SYMBOL(ipv6_chk_prefix); |
| 1754 | |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 1755 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, |
Daniel Lezcano | 1cab3da | 2008-01-10 22:44:09 -0800 | [diff] [blame] | 1756 | struct net_device *dev, int strict) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1757 | { |
David S. Miller | b79d1d5 | 2010-03-25 21:39:21 -0700 | [diff] [blame] | 1758 | struct inet6_ifaddr *ifp, *result = NULL; |
Eric Dumazet | ddbe503 | 2012-07-18 08:11:12 +0000 | [diff] [blame] | 1759 | unsigned int hash = inet6_addr_hash(addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1760 | |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 1761 | rcu_read_lock_bh(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1762 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) { |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 1763 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
Daniel Lezcano | 1cab3da | 2008-01-10 22:44:09 -0800 | [diff] [blame] | 1764 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1765 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 1766 | if (!dev || ifp->idev->dev == dev || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1767 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { |
David S. Miller | b79d1d5 | 2010-03-25 21:39:21 -0700 | [diff] [blame] | 1768 | result = ifp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1769 | in6_ifa_hold(ifp); |
| 1770 | break; |
| 1771 | } |
| 1772 | } |
| 1773 | } |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 1774 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1775 | |
David S. Miller | b79d1d5 | 2010-03-25 21:39:21 -0700 | [diff] [blame] | 1776 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1777 | } |
| 1778 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1779 | /* Gets referenced address, destroys ifaddr */ |
| 1780 | |
Brian Haley | cc411d0 | 2009-09-09 14:41:32 +0000 | [diff] [blame] | 1781 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1782 | { |
Lubomir Rintel | 3d171f3 | 2016-01-08 13:47:23 +0100 | [diff] [blame] | 1783 | if (dad_failed) |
| 1784 | ifp->flags |= IFA_F_DADFAILED; |
| 1785 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1786 | if (ifp->flags&IFA_F_PERMANENT) { |
| 1787 | spin_lock_bh(&ifp->lock); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 1788 | addrconf_del_dad_work(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1789 | ifp->flags |= IFA_F_TENTATIVE; |
| 1790 | spin_unlock_bh(&ifp->lock); |
Herbert Xu | e2577a0 | 2010-03-13 12:23:29 -0800 | [diff] [blame] | 1791 | if (dad_failed) |
| 1792 | ipv6_ifa_notify(0, ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1793 | in6_ifa_put(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1794 | } 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 Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 1807 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1808 | ipv6_del_addr(ifp); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 1809 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1810 | } |
| 1811 | |
Herbert Xu | f2344a1 | 2010-05-18 15:55:27 -0700 | [diff] [blame] | 1812 | static int addrconf_dad_end(struct inet6_ifaddr *ifp) |
| 1813 | { |
| 1814 | int err = -ENOENT; |
| 1815 | |
Hannes Frederic Sowa | 8e8e676 | 2015-03-23 23:36:03 +0100 | [diff] [blame] | 1816 | spin_lock_bh(&ifp->lock); |
Herbert Xu | f2344a1 | 2010-05-18 15:55:27 -0700 | [diff] [blame] | 1817 | if (ifp->state == INET6_IFADDR_STATE_DAD) { |
| 1818 | ifp->state = INET6_IFADDR_STATE_POSTDAD; |
| 1819 | err = 0; |
| 1820 | } |
Hannes Frederic Sowa | 8e8e676 | 2015-03-23 23:36:03 +0100 | [diff] [blame] | 1821 | spin_unlock_bh(&ifp->lock); |
Herbert Xu | f2344a1 | 2010-05-18 15:55:27 -0700 | [diff] [blame] | 1822 | |
| 1823 | return err; |
| 1824 | } |
| 1825 | |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 1826 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
| 1827 | { |
Hannes Frederic Sowa | 5f40ef7 | 2015-03-23 23:36:04 +0100 | [diff] [blame] | 1828 | struct in6_addr addr; |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 1829 | struct inet6_dev *idev = ifp->idev; |
Hannes Frederic Sowa | 1855b7c | 2015-03-23 23:36:05 +0100 | [diff] [blame] | 1830 | struct net *net = dev_net(ifp->idev->dev); |
Brian Haley | 9bdd8d4 | 2009-03-18 18:22:48 -0700 | [diff] [blame] | 1831 | |
Ursula Braun | 853dc2e | 2010-10-24 23:06:43 +0000 | [diff] [blame] | 1832 | if (addrconf_dad_end(ifp)) { |
| 1833 | in6_ifa_put(ifp); |
Herbert Xu | f2344a1 | 2010-05-18 15:55:27 -0700 | [diff] [blame] | 1834 | return; |
Ursula Braun | 853dc2e | 2010-10-24 23:06:43 +0000 | [diff] [blame] | 1835 | } |
Herbert Xu | f2344a1 | 2010-05-18 15:55:27 -0700 | [diff] [blame] | 1836 | |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 1837 | net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n", |
| 1838 | ifp->idev->dev->name, &ifp->addr); |
Brian Haley | 9bdd8d4 | 2009-03-18 18:22:48 -0700 | [diff] [blame] | 1839 | |
Hannes Frederic Sowa | 5f40ef7 | 2015-03-23 23:36:04 +0100 | [diff] [blame] | 1840 | spin_lock_bh(&ifp->lock); |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 1841 | |
Hannes Frederic Sowa | 5f40ef7 | 2015-03-23 23:36:04 +0100 | [diff] [blame] | 1842 | 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 Sowa | 5f40ef7 | 2015-03-23 23:36:04 +0100 | [diff] [blame] | 1849 | int retries = ifp->stable_privacy_retry + 1; |
| 1850 | |
Hannes Frederic Sowa | 1855b7c | 2015-03-23 23:36:05 +0100 | [diff] [blame] | 1851 | if (retries > net->ipv6.sysctl.idgen_retries) { |
Hannes Frederic Sowa | 5f40ef7 | 2015-03-23 23:36:04 +0100 | [diff] [blame] | 1852 | 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 Sowa | 1855b7c | 2015-03-23 23:36:05 +0100 | [diff] [blame] | 1886 | addrconf_mod_dad_work(ifp2, net->ipv6.sysctl.idgen_delay); |
Hannes Frederic Sowa | 5f40ef7 | 2015-03-23 23:36:04 +0100 | [diff] [blame] | 1887 | in6_ifa_put(ifp2); |
| 1888 | lock_errdad: |
| 1889 | spin_lock_bh(&ifp->lock); |
| 1890 | } else if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) { |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 1891 | 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 Haley | 9bdd8d4 | 2009-03-18 18:22:48 -0700 | [diff] [blame] | 1898 | |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 1899 | pr_info("%s: IPv6 being disabled!\n", |
Brian Haley | 9bdd8d4 | 2009-03-18 18:22:48 -0700 | [diff] [blame] | 1900 | ifp->idev->dev->name); |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 1901 | } |
| 1902 | } |
| 1903 | |
Hannes Frederic Sowa | 5f40ef7 | 2015-03-23 23:36:04 +0100 | [diff] [blame] | 1904 | errdad: |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 1905 | /* transition from _POSTDAD to _ERRDAD */ |
| 1906 | ifp->state = INET6_IFADDR_STATE_ERRDAD; |
Hannes Frederic Sowa | 8e8e676 | 2015-03-23 23:36:03 +0100 | [diff] [blame] | 1907 | spin_unlock_bh(&ifp->lock); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 1908 | |
| 1909 | addrconf_mod_dad_work(ifp, 0); |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 1910 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1911 | |
Sabrina Dubroca | a9ed4a2 | 2014-09-02 10:29:29 +0200 | [diff] [blame] | 1912 | /* Join to solicited addr multicast group. |
| 1913 | * caller must hold RTNL */ |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1914 | void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1915 | { |
| 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 Dubroca | a9ed4a2 | 2014-09-02 10:29:29 +0200 | [diff] [blame] | 1925 | /* caller must hold RTNL */ |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1926 | void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1927 | { |
| 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 Dubroca | a9ed4a2 | 2014-09-02 10:29:29 +0200 | [diff] [blame] | 1937 | /* caller must hold RTNL */ |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 1938 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1939 | { |
| 1940 | struct in6_addr addr; |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 1941 | |
Hannes Frederic Sowa | 88ad314 | 2014-01-06 17:53:14 +0100 | [diff] [blame] | 1942 | if (ifp->prefix_len >= 127) /* RFC 6164 */ |
Bjørn Mork | 2bda8a0 | 2011-07-05 23:04:13 +0000 | [diff] [blame] | 1943 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1944 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
| 1945 | if (ipv6_addr_any(&addr)) |
| 1946 | return; |
WANG Cong | 013b4d9 | 2014-09-11 15:35:11 -0700 | [diff] [blame] | 1947 | __ipv6_dev_ac_inc(ifp->idev, &addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1948 | } |
| 1949 | |
Sabrina Dubroca | a9ed4a2 | 2014-09-02 10:29:29 +0200 | [diff] [blame] | 1950 | /* caller must hold RTNL */ |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 1951 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1952 | { |
| 1953 | struct in6_addr addr; |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 1954 | |
Hannes Frederic Sowa | 88ad314 | 2014-01-06 17:53:14 +0100 | [diff] [blame] | 1955 | if (ifp->prefix_len >= 127) /* RFC 6164 */ |
YOSHIFUJI Hideaki | 32019e6 | 2011-07-24 11:44:34 +0000 | [diff] [blame] | 1956 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1957 | 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.com | 06a4c1c | 2012-05-10 03:25:52 +0000 | [diff] [blame] | 1963 | static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev) |
| 1964 | { |
Alexander Aring | 5241c2d | 2015-12-14 20:55:22 +0100 | [diff] [blame] | 1965 | if (dev->addr_len != EUI64_ADDR_LEN) |
alex.bluesman.smirnov@gmail.com | 06a4c1c | 2012-05-10 03:25:52 +0000 | [diff] [blame] | 1966 | return -1; |
Alexander Aring | 5241c2d | 2015-12-14 20:55:22 +0100 | [diff] [blame] | 1967 | memcpy(eui, dev->dev_addr, EUI64_ADDR_LEN); |
YOSHIFUJI Hideaki / 吉藤英明 | 5e98a36 | 2013-01-28 10:44:29 +0000 | [diff] [blame] | 1968 | eui[0] ^= 2; |
alex.bluesman.smirnov@gmail.com | 06a4c1c | 2012-05-10 03:25:52 +0000 | [diff] [blame] | 1969 | return 0; |
| 1970 | } |
| 1971 | |
YOSHIFUJI Hideaki / 吉藤英明 | cb6bf35 | 2013-03-25 08:26:24 +0000 | [diff] [blame] | 1972 | static 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 Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 1986 | static 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 Zack | 8e5e8f3 | 2012-04-01 07:49:08 +0000 | [diff] [blame] | 1992 | eui[7] = *(u8 *)dev->dev_addr; |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 1993 | return 0; |
| 1994 | } |
| 1995 | |
| 1996 | static 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 hemminger | c61393e | 2010-10-04 20:17:53 +0000 | [diff] [blame] | 2005 | static int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
YOSHIFUJI Hideaki | dfd982b | 2008-04-10 15:42:09 +0900 | [diff] [blame] | 2006 | { |
Sascha Hlusiak | 9af2851 | 2009-05-19 12:56:51 +0000 | [diff] [blame] | 2007 | if (addr == 0) |
| 2008 | return -1; |
YOSHIFUJI Hideaki | dfd982b | 2008-04-10 15:42:09 +0900 | [diff] [blame] | 2009 | 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 Hideaki | dfd982b | 2008-04-10 15:42:09 +0900 | [diff] [blame] | 2021 | |
| 2022 | static 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 hemminger | aee80b5 | 2011-06-08 10:44:30 +0000 | [diff] [blame] | 2029 | static int addrconf_ifid_gre(u8 *eui, struct net_device *dev) |
| 2030 | { |
| 2031 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); |
| 2032 | } |
| 2033 | |
Nicolas Dichtel | e837735 | 2013-08-20 12:16:06 +0200 | [diff] [blame] | 2034 | static 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2044 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
| 2045 | { |
| 2046 | switch (dev->type) { |
| 2047 | case ARPHRD_ETHER: |
| 2048 | case ARPHRD_FDDI: |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 2049 | return addrconf_ifid_eui48(eui, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2050 | case ARPHRD_ARCNET: |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 2051 | return addrconf_ifid_arcnet(eui, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2052 | case ARPHRD_INFINIBAND: |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 2053 | return addrconf_ifid_infiniband(eui, dev); |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 2054 | case ARPHRD_SIT: |
YOSHIFUJI Hideaki | dfd982b | 2008-04-10 15:42:09 +0900 | [diff] [blame] | 2055 | return addrconf_ifid_sit(eui, dev); |
stephen hemminger | aee80b5 | 2011-06-08 10:44:30 +0000 | [diff] [blame] | 2056 | case ARPHRD_IPGRE: |
| 2057 | return addrconf_ifid_gre(eui, dev); |
Jukka Rissanen | e74bccb | 2013-12-11 17:05:36 +0200 | [diff] [blame] | 2058 | case ARPHRD_6LOWPAN: |
alex.bluesman.smirnov@gmail.com | 06a4c1c | 2012-05-10 03:25:52 +0000 | [diff] [blame] | 2059 | return addrconf_ifid_eui64(eui, dev); |
YOSHIFUJI Hideaki / 吉藤英明 | cb6bf35 | 2013-03-25 08:26:24 +0000 | [diff] [blame] | 2060 | case ARPHRD_IEEE1394: |
| 2061 | return addrconf_ifid_ieee1394(eui, dev); |
Nicolas Dichtel | e837735 | 2013-08-20 12:16:06 +0200 | [diff] [blame] | 2062 | case ARPHRD_TUNNEL6: |
| 2063 | return addrconf_ifid_ip6tnl(eui, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2064 | } |
| 2065 | return -1; |
| 2066 | } |
| 2067 | |
| 2068 | static 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 Sowa | 602582c | 2014-01-19 21:58:19 +0100 | [diff] [blame] | 2074 | list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) { |
| 2075 | if (ifp->scope > IFA_LINK) |
| 2076 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2077 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2087 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ |
Sorin Dumitru | eb7e057 | 2012-08-30 02:01:45 +0000 | [diff] [blame] | 2088 | static void __ipv6_regen_rndid(struct inet6_dev *idev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2089 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2090 | regen: |
YOSHIFUJI Hideaki | 955189e | 2006-03-20 16:54:09 -0800 | [diff] [blame] | 2091 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2092 | idev->rndid[0] &= ~0x02; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2093 | |
| 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. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 2100 | * - ISATAP (RFC4214) 6.1 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2101 | * 00-00-5E-FE-xx-xx-xx-xx |
| 2102 | * - value 0 |
| 2103 | * - XXX: already assigned to an address on the device |
| 2104 | */ |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2105 | if (idev->rndid[0] == 0xfd && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2106 | (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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2115 | } |
| 2116 | |
| 2117 | static void ipv6_regen_rndid(unsigned long data) |
| 2118 | { |
| 2119 | struct inet6_dev *idev = (struct inet6_dev *) data; |
| 2120 | unsigned long expires; |
| 2121 | |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 2122 | rcu_read_lock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2123 | write_lock_bh(&idev->lock); |
| 2124 | |
| 2125 | if (idev->dead) |
| 2126 | goto out; |
| 2127 | |
Sorin Dumitru | eb7e057 | 2012-08-30 02:01:45 +0000 | [diff] [blame] | 2128 | __ipv6_regen_rndid(idev); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2129 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2130 | expires = jiffies + |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2131 | idev->cnf.temp_prefered_lft * HZ - |
Jiri Pirko | 1f9248e5 | 2013-12-07 19:26:53 +0100 | [diff] [blame] | 2132 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * |
| 2133 | NEIGH_VAR(idev->nd_parms, RETRANS_TIME) - |
Ben Hutchings | 784e271 | 2010-06-26 11:42:55 +0000 | [diff] [blame] | 2134 | idev->cnf.max_desync_factor * HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2135 | if (time_before(expires, jiffies)) { |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 2136 | pr_warn("%s: too short regeneration interval; timer disabled for %s\n", |
| 2137 | __func__, idev->dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2138 | goto out; |
| 2139 | } |
| 2140 | |
| 2141 | if (!mod_timer(&idev->regen_timer, expires)) |
| 2142 | in6_dev_hold(idev); |
| 2143 | |
| 2144 | out: |
| 2145 | write_unlock_bh(&idev->lock); |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 2146 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2147 | in6_dev_put(idev); |
| 2148 | } |
| 2149 | |
Sorin Dumitru | eb7e057 | 2012-08-30 02:01:45 +0000 | [diff] [blame] | 2150 | static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) |
Eldad Zack | 8e5e8f3 | 2012-04-01 07:49:08 +0000 | [diff] [blame] | 2151 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2152 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) |
Sorin Dumitru | eb7e057 | 2012-08-30 02:01:45 +0000 | [diff] [blame] | 2153 | __ipv6_regen_rndid(idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2154 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2155 | |
| 2156 | /* |
| 2157 | * Add prefix route. |
| 2158 | */ |
| 2159 | |
| 2160 | static void |
| 2161 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, |
Jamal Hadi Salim | e431b8c | 2005-06-18 22:55:31 -0700 | [diff] [blame] | 2162 | unsigned long expires, u32 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2163 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2164 | struct fib6_config cfg = { |
David Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 2165 | .fc_table = l3mdev_fib_table(dev) ? : RT6_TABLE_PREFIX, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2166 | .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 Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2171 | .fc_nlinfo.nl_net = dev_net(dev), |
Stephen Hemminger | f410a1f | 2008-08-23 05:16:46 -0700 | [diff] [blame] | 2172 | .fc_protocol = RTPROT_KERNEL, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2173 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2174 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2175 | cfg.fc_dst = *pfx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2176 | |
| 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 Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 2181 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2182 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
| 2183 | cfg.fc_flags |= RTF_NONEXTHOP; |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2184 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2185 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2186 | ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2187 | } |
| 2188 | |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 2189 | |
| 2190 | static 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 Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 2198 | u32 tb_id = l3mdev_fib_table(dev) ? : RT6_TABLE_PREFIX; |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 2199 | |
David Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 2200 | table = fib6_get_table(dev_net(dev), tb_id); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 2201 | if (!table) |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 2202 | return NULL; |
| 2203 | |
Li RongQing | 5744dd9 | 2012-09-11 21:59:01 +0000 | [diff] [blame] | 2204 | read_lock_bh(&table->tb6_lock); |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 2205 | fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0); |
| 2206 | if (!fn) |
| 2207 | goto out; |
Martin KaFai Lau | 1f56a01 | 2015-04-28 13:03:03 -0700 | [diff] [blame] | 2208 | |
| 2209 | noflags |= RTF_CACHE; |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 2210 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2211 | if (rt->dst.dev->ifindex != dev->ifindex) |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 2212 | continue; |
| 2213 | if ((rt->rt6i_flags & flags) != flags) |
| 2214 | continue; |
Romain Kuntz | 85da53b | 2013-01-09 15:02:26 +0100 | [diff] [blame] | 2215 | if ((rt->rt6i_flags & noflags) != 0) |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 2216 | continue; |
| 2217 | dst_hold(&rt->dst); |
| 2218 | break; |
| 2219 | } |
| 2220 | out: |
Li RongQing | 5744dd9 | 2012-09-11 21:59:01 +0000 | [diff] [blame] | 2221 | read_unlock_bh(&table->tb6_lock); |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 2222 | return rt; |
| 2223 | } |
| 2224 | |
| 2225 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2226 | /* Create "default" multicast route to the interface */ |
| 2227 | |
| 2228 | static void addrconf_add_mroute(struct net_device *dev) |
| 2229 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2230 | struct fib6_config cfg = { |
David Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 2231 | .fc_table = l3mdev_fib_table(dev) ? : RT6_TABLE_LOCAL, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2232 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
| 2233 | .fc_ifindex = dev->ifindex, |
| 2234 | .fc_dst_len = 8, |
| 2235 | .fc_flags = RTF_UP, |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2236 | .fc_nlinfo.nl_net = dev_net(dev), |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2237 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2238 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2239 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); |
| 2240 | |
| 2241 | ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2242 | } |
| 2243 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2244 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) |
| 2245 | { |
| 2246 | struct inet6_dev *idev; |
| 2247 | |
| 2248 | ASSERT_RTNL(); |
| 2249 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 2250 | idev = ipv6_find_idev(dev); |
| 2251 | if (!idev) |
Brian Haley | 64e724f | 2010-07-20 10:34:30 +0000 | [diff] [blame] | 2252 | return ERR_PTR(-ENOBUFS); |
| 2253 | |
| 2254 | if (idev->cnf.disable_ipv6) |
| 2255 | return ERR_PTR(-EACCES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2256 | |
| 2257 | /* Add default multicast route */ |
Li Wei | 4af04ab | 2011-12-06 21:23:45 +0000 | [diff] [blame] | 2258 | if (!(dev->flags & IFF_LOOPBACK)) |
| 2259 | addrconf_add_mroute(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2260 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2261 | return idev; |
| 2262 | } |
| 2263 | |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 2264 | static 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 Mork | cc9da6c | 2015-12-16 16:44:38 +0100 | [diff] [blame] | 2331 | static 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 Horman | e6bff99 | 2012-01-04 10:49:15 +0000 | [diff] [blame] | 2337 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2338 | { |
| 2339 | struct prefix_info *pinfo; |
| 2340 | __u32 valid_lft; |
| 2341 | __u32 prefered_lft; |
| 2342 | int addr_type; |
Hannes Frederic Sowa | 64236f3 | 2015-03-23 23:36:02 +0100 | [diff] [blame] | 2343 | u32 addr_flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2344 | struct inet6_dev *in6_dev; |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 2345 | struct net *net = dev_net(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2346 | |
| 2347 | pinfo = (struct prefix_info *) opt; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2348 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2349 | if (len < sizeof(struct prefix_info)) { |
dingtianhong | ba3542e | 2013-08-17 10:27:04 +0800 | [diff] [blame] | 2350 | ADBG("addrconf: prefix option too short\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2351 | return; |
| 2352 | } |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2353 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2354 | /* |
| 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 Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 2367 | net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2368 | return; |
| 2369 | } |
| 2370 | |
| 2371 | in6_dev = in6_dev_get(dev); |
| 2372 | |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 2373 | if (!in6_dev) { |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 2374 | net_dbg_ratelimited("addrconf: device %s not configured\n", |
| 2375 | dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2376 | 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 Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2385 | if (pinfo->onlink) { |
| 2386 | struct rt6_info *rt; |
| 2387 | unsigned long rt_expires; |
| 2388 | |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2389 | /* 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 Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2394 | 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 Hideaki | 3dd4bc6 | 2005-12-19 14:02:45 -0800 | [diff] [blame] | 2398 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2399 | if (addrconf_finite_timeout(rt_expires)) |
| 2400 | rt_expires *= HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2401 | |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 2402 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2407 | |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 2408 | if (rt) { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2409 | /* Autoconf prefix route */ |
| 2410 | if (valid_lft == 0) { |
| 2411 | ip6_del_rt(rt); |
| 2412 | rt = NULL; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2413 | } else if (addrconf_finite_timeout(rt_expires)) { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2414 | /* not infinity */ |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 2415 | rt6_set_expires(rt, jiffies + rt_expires); |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2416 | } else { |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 2417 | rt6_clean_expires(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2418 | } |
| 2419 | } else if (valid_lft) { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2420 | clock_t expires = 0; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2421 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
| 2422 | if (addrconf_finite_timeout(rt_expires)) { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2423 | /* not infinity */ |
| 2424 | flags |= RTF_EXPIRES; |
| 2425 | expires = jiffies_to_clock_t(rt_expires); |
| 2426 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2427 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2428 | dev, expires, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2429 | } |
Amerigo Wang | 94e187c | 2012-10-29 00:13:19 +0000 | [diff] [blame] | 2430 | ip6_rt_put(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2431 | } |
| 2432 | |
| 2433 | /* Try to figure out our local address for this prefix */ |
| 2434 | |
| 2435 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { |
Eldad Zack | 8e5e8f3 | 2012-04-01 07:49:08 +0000 | [diff] [blame] | 2436 | struct inet6_ifaddr *ifp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2437 | struct in6_addr addr; |
| 2438 | int create = 0, update_lft = 0; |
Daniel Borkmann | 617fe29 | 2013-04-09 03:47:16 +0000 | [diff] [blame] | 2439 | bool tokenized = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2440 | |
| 2441 | if (pinfo->prefix_len == 64) { |
| 2442 | memcpy(&addr, &pinfo->prefix, 8); |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 2443 | |
| 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 Borkmann | 617fe29 | 2013-04-09 03:47:16 +0000 | [diff] [blame] | 2449 | tokenized = true; |
Bjørn Mork | cc9da6c | 2015-12-16 16:44:38 +0100 | [diff] [blame] | 2450 | } else if (is_addr_mode_generate_stable(in6_dev) && |
Hannes Frederic Sowa | 622c81d | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 2451 | !ipv6_generate_stable_address(&addr, 0, |
| 2452 | in6_dev)) { |
Hannes Frederic Sowa | 64236f3 | 2015-03-23 23:36:02 +0100 | [diff] [blame] | 2453 | addr_flags |= IFA_F_STABLE_PRIVACY; |
Hannes Frederic Sowa | 622c81d | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 2454 | goto ok; |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 2455 | } else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && |
| 2456 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2457 | in6_dev_put(in6_dev); |
| 2458 | return; |
| 2459 | } |
| 2460 | goto ok; |
| 2461 | } |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 2462 | net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n", |
| 2463 | pinfo->prefix_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2464 | in6_dev_put(in6_dev); |
| 2465 | return; |
| 2466 | |
| 2467 | ok: |
| 2468 | |
YOSHIFUJI Hideaki | 53b7997 | 2008-07-19 22:35:03 -0700 | [diff] [blame] | 2469 | ifp = ipv6_get_ifaddr(net, &addr, dev, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2470 | |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 2471 | if (!ifp && valid_lft) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2472 | int max_addresses = in6_dev->cnf.max_addresses; |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2473 | |
| 2474 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 2475 | if (in6_dev->cnf.optimistic_dad && |
Neil Horman | e6bff99 | 2012-01-04 10:49:15 +0000 | [diff] [blame] | 2476 | !net->ipv6.devconf_all->forwarding && sllao) |
Bjørn Mork | 9a1ec46 | 2015-12-04 14:15:08 +0100 | [diff] [blame] | 2477 | addr_flags |= IFA_F_OPTIMISTIC; |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2478 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2479 | |
| 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 Pirko | 3f8f529 | 2013-08-01 10:41:27 +0200 | [diff] [blame] | 2485 | ifp = ipv6_add_addr(in6_dev, &addr, NULL, |
| 2486 | pinfo->prefix_len, |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2487 | addr_type&IPV6_ADDR_SCOPE_MASK, |
Jiri Benc | 8a226b2 | 2013-08-01 10:41:28 +0200 | [diff] [blame] | 2488 | addr_flags, valid_lft, |
| 2489 | prefered_lft); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2490 | |
YOSHIFUJI Hideaki / 吉藤英明 | 3f0d2ba | 2013-01-22 06:32:54 +0000 | [diff] [blame] | 2491 | if (IS_ERR_OR_NULL(ifp)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2492 | in6_dev_put(in6_dev); |
| 2493 | return; |
| 2494 | } |
| 2495 | |
Jiri Benc | 8a226b2 | 2013-08-01 10:41:28 +0200 | [diff] [blame] | 2496 | update_lft = 0; |
| 2497 | create = 1; |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 2498 | spin_lock_bh(&ifp->lock); |
| 2499 | ifp->flags |= IFA_F_MANAGETEMPADDR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2500 | ifp->cstamp = jiffies; |
Daniel Borkmann | 617fe29 | 2013-04-09 03:47:16 +0000 | [diff] [blame] | 2501 | ifp->tokenized = tokenized; |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 2502 | spin_unlock_bh(&ifp->lock); |
David S. Miller | cf22f9a | 2012-04-14 21:37:40 -0400 | [diff] [blame] | 2503 | addrconf_dad_start(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2504 | } |
| 2505 | |
| 2506 | if (ifp) { |
Jiri Pirko | 479840f | 2013-12-06 09:45:21 +0100 | [diff] [blame] | 2507 | u32 flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2508 | unsigned long now; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2509 | u32 stored_lft; |
| 2510 | |
| 2511 | /* update lifetime (RFC2462 5.5.3 e) */ |
Hannes Frederic Sowa | 8e8e676 | 2015-03-23 23:36:03 +0100 | [diff] [blame] | 2512 | spin_lock_bh(&ifp->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2513 | 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 Benc | 8a226b2 | 2013-08-01 10:41:28 +0200 | [diff] [blame] | 2518 | if (!update_lft && !create && stored_lft) { |
Fabian Frederick | 9451a30 | 2014-10-27 19:11:56 +0100 | [diff] [blame] | 2519 | const u32 minimum_lft = min_t(u32, |
| 2520 | stored_lft, MIN_VALID_LIFETIME); |
Paul Marks | c9d55d5 | 2013-09-25 15:12:55 -0700 | [diff] [blame] | 2521 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2534 | } |
| 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 Sowa | 8e8e676 | 2015-03-23 23:36:03 +0100 | [diff] [blame] | 2542 | spin_unlock_bh(&ifp->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2543 | |
| 2544 | if (!(flags&IFA_F_TENTATIVE)) |
| 2545 | ipv6_ifa_notify(0, ifp); |
| 2546 | } else |
Hannes Frederic Sowa | 8e8e676 | 2015-03-23 23:36:03 +0100 | [diff] [blame] | 2547 | spin_unlock_bh(&ifp->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2548 | |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 2549 | manage_tempaddrs(in6_dev, ifp, valid_lft, prefered_lft, |
| 2550 | create, now); |
David S. Miller | 5d9efa7 | 2013-10-28 20:07:50 -0400 | [diff] [blame] | 2551 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2552 | in6_ifa_put(ifp); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 2553 | addrconf_verify(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2554 | } |
| 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 Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2565 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2566 | { |
| 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 Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2577 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2578 | |
| 2579 | err = -ENODEV; |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 2580 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2581 | goto err_exit; |
| 2582 | |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 2583 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2584 | if (dev->type == ARPHRD_SIT) { |
Stephen Hemminger | 5bc3eb7 | 2008-11-19 21:52:05 -0800 | [diff] [blame] | 2585 | const struct net_device_ops *ops = dev->netdev_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2586 | struct ifreq ifr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2587 | 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 Hemminger | d20b310 | 2008-01-21 00:48:43 -0800 | [diff] [blame] | 2600 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2601 | |
Stephen Hemminger | 5bc3eb7 | 2008-11-19 21:52:05 -0800 | [diff] [blame] | 2602 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2610 | |
| 2611 | if (err == 0) { |
| 2612 | err = -ENOBUFS; |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2613 | dev = __dev_get_by_name(net, p.name); |
| 2614 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2615 | goto err_exit; |
| 2616 | err = dev_open(dev); |
| 2617 | } |
| 2618 | } |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2619 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2620 | |
| 2621 | err_exit: |
| 2622 | rtnl_unlock(); |
| 2623 | return err; |
| 2624 | } |
| 2625 | |
Madhu Challa | 93a714d | 2015-02-25 09:58:35 -0800 | [diff] [blame] | 2626 | static 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 Leitner | 54ff9ef | 2015-03-18 14:50:43 -0300 | [diff] [blame] | 2635 | ret = ipv6_sock_mc_join(sk, ifindex, addr); |
Madhu Challa | 93a714d | 2015-02-25 09:58:35 -0800 | [diff] [blame] | 2636 | else |
Marcelo Ricardo Leitner | 54ff9ef | 2015-03-18 14:50:43 -0300 | [diff] [blame] | 2637 | ret = ipv6_sock_mc_drop(sk, ifindex, addr); |
Madhu Challa | 93a714d | 2015-02-25 09:58:35 -0800 | [diff] [blame] | 2638 | release_sock(sk); |
| 2639 | |
| 2640 | return ret; |
| 2641 | } |
| 2642 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2643 | /* |
| 2644 | * Manual configuration of address on an interface |
| 2645 | */ |
Jiri Pirko | 479840f | 2013-12-06 09:45:21 +0100 | [diff] [blame] | 2646 | static int inet6_addr_add(struct net *net, int ifindex, |
| 2647 | const struct in6_addr *pfx, |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 2648 | const struct in6_addr *peer_pfx, |
Jiri Pirko | 479840f | 2013-12-06 09:45:21 +0100 | [diff] [blame] | 2649 | unsigned int plen, __u32 ifa_flags, |
| 2650 | __u32 prefered_lft, __u32 valid_lft) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2651 | { |
| 2652 | struct inet6_ifaddr *ifp; |
| 2653 | struct inet6_dev *idev; |
| 2654 | struct net_device *dev; |
Madhu Challa | 93a714d | 2015-02-25 09:58:35 -0800 | [diff] [blame] | 2655 | unsigned long timeout; |
| 2656 | clock_t expires; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2657 | int scope; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2658 | u32 flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2659 | |
| 2660 | ASSERT_RTNL(); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2661 | |
Thomas Graf | 24ef0da | 2008-05-28 16:54:22 +0200 | [diff] [blame] | 2662 | if (plen > 128) |
| 2663 | return -EINVAL; |
| 2664 | |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2665 | /* check the lifetime */ |
| 2666 | if (!valid_lft || prefered_lft > valid_lft) |
| 2667 | return -EINVAL; |
| 2668 | |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 2669 | if (ifa_flags & IFA_F_MANAGETEMPADDR && plen != 64) |
| 2670 | return -EINVAL; |
| 2671 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2672 | dev = __dev_get_by_index(net, ifindex); |
| 2673 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2674 | return -ENODEV; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2675 | |
Brian Haley | 64e724f | 2010-07-20 10:34:30 +0000 | [diff] [blame] | 2676 | idev = addrconf_add_dev(dev); |
| 2677 | if (IS_ERR(idev)) |
| 2678 | return PTR_ERR(idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2679 | |
Madhu Challa | 93a714d | 2015-02-25 09:58:35 -0800 | [diff] [blame] | 2680 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2688 | scope = ipv6_addr_scope(pfx); |
| 2689 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2690 | 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 Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2694 | flags = RTF_EXPIRES; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2695 | } else { |
| 2696 | expires = 0; |
| 2697 | flags = 0; |
| 2698 | ifa_flags |= IFA_F_PERMANENT; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2699 | } |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2700 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2701 | 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 TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2707 | |
Jiri Benc | 8a226b2 | 2013-08-01 10:41:28 +0200 | [diff] [blame] | 2708 | ifp = ipv6_add_addr(idev, pfx, peer_pfx, plen, scope, ifa_flags, |
| 2709 | valid_lft, prefered_lft); |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2710 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2711 | if (!IS_ERR(ifp)) { |
Thomas Haller | 761aac7 | 2014-01-15 15:36:58 +0100 | [diff] [blame] | 2712 | if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) { |
| 2713 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
| 2714 | expires, flags); |
| 2715 | } |
| 2716 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2717 | /* |
| 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. Miller | cf22f9a | 2012-04-14 21:37:40 -0400 | [diff] [blame] | 2722 | addrconf_dad_start(ifp); |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 2723 | if (ifa_flags & IFA_F_MANAGETEMPADDR) |
| 2724 | manage_tempaddrs(idev, ifp, valid_lft, prefered_lft, |
| 2725 | true, jiffies); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2726 | in6_ifa_put(ifp); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 2727 | addrconf_verify_rtnl(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2728 | return 0; |
Madhu Challa | 93a714d | 2015-02-25 09:58:35 -0800 | [diff] [blame] | 2729 | } else if (ifa_flags & IFA_F_MCAUTOJOIN) { |
| 2730 | ipv6_mc_config(net->ipv6.mc_autojoin_sk, |
| 2731 | false, pfx, ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2732 | } |
| 2733 | |
| 2734 | return PTR_ERR(ifp); |
| 2735 | } |
| 2736 | |
Heiner Kallweit | 6046d5b | 2014-04-20 21:29:36 +0200 | [diff] [blame] | 2737 | static int inet6_addr_del(struct net *net, int ifindex, u32 ifa_flags, |
| 2738 | const struct in6_addr *pfx, unsigned int plen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2739 | { |
| 2740 | struct inet6_ifaddr *ifp; |
| 2741 | struct inet6_dev *idev; |
| 2742 | struct net_device *dev; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2743 | |
Thomas Graf | 24ef0da | 2008-05-28 16:54:22 +0200 | [diff] [blame] | 2744 | if (plen > 128) |
| 2745 | return -EINVAL; |
| 2746 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2747 | dev = __dev_get_by_index(net, ifindex); |
| 2748 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2749 | return -ENODEV; |
| 2750 | |
Ian Morris | e5d08d7 | 2014-11-23 21:28:43 +0000 | [diff] [blame] | 2751 | idev = __in6_dev_get(dev); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 2752 | if (!idev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2753 | return -ENXIO; |
| 2754 | |
| 2755 | read_lock_bh(&idev->lock); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 2756 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2757 | if (ifp->prefix_len == plen && |
| 2758 | ipv6_addr_equal(pfx, &ifp->addr)) { |
| 2759 | in6_ifa_hold(ifp); |
| 2760 | read_unlock_bh(&idev->lock); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2761 | |
Heiner Kallweit | 6046d5b | 2014-04-20 21:29:36 +0200 | [diff] [blame] | 2762 | if (!(ifp->flags & IFA_F_TEMPORARY) && |
| 2763 | (ifa_flags & IFA_F_MANAGETEMPADDR)) |
| 2764 | manage_tempaddrs(idev, ifp, 0, 0, false, |
| 2765 | jiffies); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2766 | ipv6_del_addr(ifp); |
Heiner Kallweit | 6046d5b | 2014-04-20 21:29:36 +0200 | [diff] [blame] | 2767 | addrconf_verify_rtnl(); |
Madhu Challa | 93a714d | 2015-02-25 09:58:35 -0800 | [diff] [blame] | 2768 | if (ipv6_addr_is_multicast(pfx)) { |
| 2769 | ipv6_mc_config(net->ipv6.mc_autojoin_sk, |
| 2770 | false, pfx, dev->ifindex); |
| 2771 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2772 | return 0; |
| 2773 | } |
| 2774 | } |
| 2775 | read_unlock_bh(&idev->lock); |
| 2776 | return -EADDRNOTAVAIL; |
| 2777 | } |
| 2778 | |
| 2779 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2780 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2781 | { |
| 2782 | struct in6_ifreq ireq; |
| 2783 | int err; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2784 | |
Eric W. Biederman | af31f41 | 2012-11-16 03:03:06 +0000 | [diff] [blame] | 2785 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2786 | return -EPERM; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2787 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2788 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
| 2789 | return -EFAULT; |
| 2790 | |
| 2791 | rtnl_lock(); |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 2792 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, NULL, |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2793 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, |
| 2794 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2795 | rtnl_unlock(); |
| 2796 | return err; |
| 2797 | } |
| 2798 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2799 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2800 | { |
| 2801 | struct in6_ifreq ireq; |
| 2802 | int err; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2803 | |
Eric W. Biederman | af31f41 | 2012-11-16 03:03:06 +0000 | [diff] [blame] | 2804 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2805 | return -EPERM; |
| 2806 | |
| 2807 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
| 2808 | return -EFAULT; |
| 2809 | |
| 2810 | rtnl_lock(); |
Heiner Kallweit | 6046d5b | 2014-04-20 21:29:36 +0200 | [diff] [blame] | 2811 | err = inet6_addr_del(net, ireq.ifr6_ifindex, 0, &ireq.ifr6_addr, |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2812 | ireq.ifr6_prefixlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2813 | rtnl_unlock(); |
| 2814 | return err; |
| 2815 | } |
| 2816 | |
Ilpo Järvinen | b5f348e | 2009-02-06 23:48:01 -0800 | [diff] [blame] | 2817 | static 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 Benc | 8a226b2 | 2013-08-01 10:41:28 +0200 | [diff] [blame] | 2822 | ifp = ipv6_add_addr(idev, addr, NULL, plen, |
Hannes Frederic Sowa | 07edd74 | 2014-01-08 15:43:22 +0100 | [diff] [blame] | 2823 | scope, IFA_F_PERMANENT, |
| 2824 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); |
Ilpo Järvinen | b5f348e | 2009-02-06 23:48:01 -0800 | [diff] [blame] | 2825 | 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 Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 2834 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2835 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
| 2836 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2837 | struct in6_addr addr; |
| 2838 | struct net_device *dev; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2839 | struct net *net = dev_net(idev->dev); |
Nicolas Dichtel | 929c9cf | 2013-11-14 13:51:05 +0100 | [diff] [blame] | 2840 | int scope, plen; |
Nicolas Dichtel | f0e2acf | 2013-11-14 13:51:06 +0100 | [diff] [blame] | 2841 | u32 pflags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2842 | |
| 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 Dichtel | 929c9cf | 2013-11-14 13:51:05 +0100 | [diff] [blame] | 2851 | plen = 64; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2852 | } else { |
| 2853 | scope = IPV6_ADDR_COMPATv4; |
Nicolas Dichtel | 929c9cf | 2013-11-14 13:51:05 +0100 | [diff] [blame] | 2854 | plen = 96; |
Nicolas Dichtel | f0e2acf | 2013-11-14 13:51:06 +0100 | [diff] [blame] | 2855 | pflags |= RTF_NONEXTHOP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2856 | } |
| 2857 | |
| 2858 | if (addr.s6_addr32[3]) { |
Nicolas Dichtel | 929c9cf | 2013-11-14 13:51:05 +0100 | [diff] [blame] | 2859 | add_addr(idev, &addr, plen, scope); |
Nicolas Dichtel | f0e2acf | 2013-11-14 13:51:06 +0100 | [diff] [blame] | 2860 | addrconf_prefix_route(&addr, plen, idev->dev, 0, pflags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2861 | return; |
| 2862 | } |
| 2863 | |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 2864 | for_each_netdev(net, dev) { |
Eldad Zack | 8e5e8f3 | 2012-04-01 07:49:08 +0000 | [diff] [blame] | 2865 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2866 | if (in_dev && (dev->flags & IFF_UP)) { |
Eldad Zack | 8e5e8f3 | 2012-04-01 07:49:08 +0000 | [diff] [blame] | 2867 | struct in_ifaddr *ifa; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2868 | |
| 2869 | int flag = scope; |
| 2870 | |
| 2871 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2872 | |
| 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2882 | |
Ilpo Järvinen | b5f348e | 2009-02-06 23:48:01 -0800 | [diff] [blame] | 2883 | add_addr(idev, &addr, plen, flag); |
Nicolas Dichtel | f0e2acf | 2013-11-14 13:51:06 +0100 | [diff] [blame] | 2884 | addrconf_prefix_route(&addr, plen, idev->dev, 0, |
| 2885 | pflags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2886 | } |
| 2887 | } |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2888 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2889 | } |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2890 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2891 | |
| 2892 | static void init_loopback(struct net_device *dev) |
| 2893 | { |
| 2894 | struct inet6_dev *idev; |
Balakumaran Kannan | 25fb6ca4 | 2013-04-02 16:15:05 +0530 | [diff] [blame] | 2895 | struct net_device *sp_dev; |
| 2896 | struct inet6_ifaddr *sp_ifa; |
| 2897 | struct rt6_info *sp_rt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2898 | |
| 2899 | /* ::1 */ |
| 2900 | |
| 2901 | ASSERT_RTNL(); |
| 2902 | |
Ian Morris | e5d08d7 | 2014-11-23 21:28:43 +0000 | [diff] [blame] | 2903 | idev = ipv6_find_idev(dev); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 2904 | if (!idev) { |
Joe Perches | 91df42b | 2012-05-15 14:11:54 +0000 | [diff] [blame] | 2905 | pr_debug("%s: add_dev failed\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2906 | return; |
| 2907 | } |
| 2908 | |
Ilpo Järvinen | b5f348e | 2009-02-06 23:48:01 -0800 | [diff] [blame] | 2909 | add_addr(idev, &in6addr_loopback, 128, IFA_HOST); |
Balakumaran Kannan | 25fb6ca4 | 2013-04-02 16:15:05 +0530 | [diff] [blame] | 2910 | |
| 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 feng | 33d9911 | 2014-01-24 16:29:11 +0800 | [diff] [blame] | 2926 | 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 feng | a881ae1 | 2013-06-16 11:14:30 +0800 | [diff] [blame] | 2938 | |
François-Xavier Le Bail | 57ec0af | 2013-12-02 11:28:49 +0100 | [diff] [blame] | 2939 | sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, false); |
Balakumaran Kannan | 25fb6ca4 | 2013-04-02 16:15:05 +0530 | [diff] [blame] | 2940 | |
| 2941 | /* Failure cases are ignored */ |
Gao feng | 534c877 | 2013-06-02 22:16:21 +0000 | [diff] [blame] | 2942 | if (!IS_ERR(sp_rt)) { |
| 2943 | sp_ifa->rt = sp_rt; |
Balakumaran Kannan | 25fb6ca4 | 2013-04-02 16:15:05 +0530 | [diff] [blame] | 2944 | ip6_ins_rt(sp_rt); |
Gao feng | 534c877 | 2013-06-02 22:16:21 +0000 | [diff] [blame] | 2945 | } |
Balakumaran Kannan | 25fb6ca4 | 2013-04-02 16:15:05 +0530 | [diff] [blame] | 2946 | } |
| 2947 | read_unlock_bh(&idev->lock); |
| 2948 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2949 | } |
| 2950 | |
Hannes Frederic Sowa | 64236f3 | 2015-03-23 23:36:02 +0100 | [diff] [blame] | 2951 | static void addrconf_add_linklocal(struct inet6_dev *idev, |
| 2952 | const struct in6_addr *addr, u32 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2953 | { |
Eldad Zack | 8e5e8f3 | 2012-04-01 07:49:08 +0000 | [diff] [blame] | 2954 | struct inet6_ifaddr *ifp; |
Hannes Frederic Sowa | 64236f3 | 2015-03-23 23:36:02 +0100 | [diff] [blame] | 2955 | u32 addr_flags = flags | IFA_F_PERMANENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2956 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2957 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 2958 | if (idev->cnf.optimistic_dad && |
David Miller | 702beb8 | 2008-07-20 18:17:02 -0700 | [diff] [blame] | 2959 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2960 | addr_flags |= IFA_F_OPTIMISTIC; |
| 2961 | #endif |
| 2962 | |
Hannes Frederic Sowa | 07edd74 | 2014-01-08 15:43:22 +0100 | [diff] [blame] | 2963 | ifp = ipv6_add_addr(idev, addr, NULL, 64, IFA_LINK, addr_flags, |
| 2964 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2965 | if (!IS_ERR(ifp)) { |
YOSHIFUJI Hideaki | 46d4804 | 2007-02-07 20:36:26 +0900 | [diff] [blame] | 2966 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
David S. Miller | cf22f9a | 2012-04-14 21:37:40 -0400 | [diff] [blame] | 2967 | addrconf_dad_start(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2968 | in6_ifa_put(ifp); |
| 2969 | } |
| 2970 | } |
| 2971 | |
Hannes Frederic Sowa | 622c81d | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 2972 | static 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 | |
| 2988 | static int ipv6_generate_stable_address(struct in6_addr *address, |
| 2989 | u8 dad_count, |
| 2990 | const struct inet6_dev *idev) |
| 2991 | { |
Hannes Frederic Sowa | 622c81d | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 2992 | 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 Sowa | ff40217 | 2015-03-24 11:05:28 +0100 | [diff] [blame] | 3000 | __be32 prefix[2]; |
Hannes Frederic Sowa | 622c81d | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 3001 | 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 | |
| 3019 | retry: |
| 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 Sowa | ff40217 | 2015-03-24 11:05:28 +0100 | [diff] [blame] | 3026 | data.prefix[0] = address->s6_addr32[0]; |
| 3027 | data.prefix[1] = address->s6_addr32[1]; |
Hannes Frederic Sowa | 622c81d | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 3028 | data.secret = secret; |
| 3029 | data.dad_count = dad_count; |
| 3030 | |
| 3031 | sha_transform(digest, data.__data, workspace); |
| 3032 | |
| 3033 | temp = *address; |
Hannes Frederic Sowa | ff40217 | 2015-03-24 11:05:28 +0100 | [diff] [blame] | 3034 | temp.s6_addr32[2] = (__force __be32)digest[0]; |
| 3035 | temp.s6_addr32[3] = (__force __be32)digest[1]; |
Hannes Frederic Sowa | 622c81d | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 3036 | |
| 3037 | spin_unlock_bh(&lock); |
| 3038 | |
| 3039 | if (ipv6_reserved_interfaceid(temp)) { |
| 3040 | dad_count++; |
Hannes Frederic Sowa | 1855b7c | 2015-03-23 23:36:05 +0100 | [diff] [blame] | 3041 | if (dad_count > dev_net(idev->dev)->ipv6.sysctl.idgen_retries) |
Hannes Frederic Sowa | 622c81d | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 3042 | return -1; |
| 3043 | goto retry; |
| 3044 | } |
| 3045 | |
| 3046 | *address = temp; |
| 3047 | return 0; |
| 3048 | } |
| 3049 | |
Bjørn Mork | cc9da6c | 2015-12-16 16:44:38 +0100 | [diff] [blame] | 3050 | static 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 Pirko | bc91b0f | 2014-07-11 21:10:18 +0200 | [diff] [blame] | 3061 | static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route) |
| 3062 | { |
Hannes Frederic Sowa | 622c81d | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 3063 | struct in6_addr addr; |
Jiri Pirko | bc91b0f | 2014-07-11 21:10:18 +0200 | [diff] [blame] | 3064 | |
David Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 3065 | /* no link local addresses on L3 master devices */ |
| 3066 | if (netif_is_l3_master(idev->dev)) |
| 3067 | return; |
| 3068 | |
Hannes Frederic Sowa | 622c81d | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 3069 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); |
| 3070 | |
Bjørn Mork | cc9da6c | 2015-12-16 16:44:38 +0100 | [diff] [blame] | 3071 | 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 Sowa | 622c81d | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 3076 | if (!ipv6_generate_stable_address(&addr, 0, idev)) |
Hannes Frederic Sowa | 64236f3 | 2015-03-23 23:36:02 +0100 | [diff] [blame] | 3077 | addrconf_add_linklocal(idev, &addr, |
| 3078 | IFA_F_STABLE_PRIVACY); |
Hannes Frederic Sowa | 622c81d | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 3079 | else if (prefix_route) |
| 3080 | addrconf_prefix_route(&addr, 64, idev->dev, 0, 0); |
Bjørn Mork | cc9da6c | 2015-12-16 16:44:38 +0100 | [diff] [blame] | 3081 | break; |
| 3082 | case IN6_ADDR_GEN_MODE_EUI64: |
Jiri Pirko | bc91b0f | 2014-07-11 21:10:18 +0200 | [diff] [blame] | 3083 | /* 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 Sowa | 64236f3 | 2015-03-23 23:36:02 +0100 | [diff] [blame] | 3088 | addrconf_add_linklocal(idev, &addr, 0); |
Jiri Pirko | bc91b0f | 2014-07-11 21:10:18 +0200 | [diff] [blame] | 3089 | else if (prefix_route) |
| 3090 | addrconf_prefix_route(&addr, 64, idev->dev, 0, 0); |
Bjørn Mork | cc9da6c | 2015-12-16 16:44:38 +0100 | [diff] [blame] | 3091 | break; |
| 3092 | case IN6_ADDR_GEN_MODE_NONE: |
| 3093 | default: |
| 3094 | /* will not add any link local address */ |
| 3095 | break; |
Jiri Pirko | bc91b0f | 2014-07-11 21:10:18 +0200 | [diff] [blame] | 3096 | } |
| 3097 | } |
| 3098 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3099 | static void addrconf_dev_config(struct net_device *dev) |
| 3100 | { |
Eldad Zack | 8e5e8f3 | 2012-04-01 07:49:08 +0000 | [diff] [blame] | 3101 | struct inet6_dev *idev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3102 | |
| 3103 | ASSERT_RTNL(); |
| 3104 | |
Herbert Xu | 74235a2 | 2007-06-14 13:02:55 -0700 | [diff] [blame] | 3105 | if ((dev->type != ARPHRD_ETHER) && |
| 3106 | (dev->type != ARPHRD_FDDI) && |
Herbert Xu | 74235a2 | 2007-06-14 13:02:55 -0700 | [diff] [blame] | 3107 | (dev->type != ARPHRD_ARCNET) && |
alex.bluesman.smirnov@gmail.com | 06a4c1c | 2012-05-10 03:25:52 +0000 | [diff] [blame] | 3108 | (dev->type != ARPHRD_INFINIBAND) && |
Nicolas Dichtel | e837735 | 2013-08-20 12:16:06 +0200 | [diff] [blame] | 3109 | (dev->type != ARPHRD_IEEE1394) && |
Jukka Rissanen | e74bccb | 2013-12-11 17:05:36 +0200 | [diff] [blame] | 3110 | (dev->type != ARPHRD_TUNNEL6) && |
Bjørn Mork | cc9da6c | 2015-12-16 16:44:38 +0100 | [diff] [blame] | 3111 | (dev->type != ARPHRD_6LOWPAN) && |
| 3112 | (dev->type != ARPHRD_NONE)) { |
Herbert Xu | 74235a2 | 2007-06-14 13:02:55 -0700 | [diff] [blame] | 3113 | /* Alas, we support only Ethernet autoconfiguration. */ |
| 3114 | return; |
| 3115 | } |
| 3116 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3117 | idev = addrconf_add_dev(dev); |
Brian Haley | 64e724f | 2010-07-20 10:34:30 +0000 | [diff] [blame] | 3118 | if (IS_ERR(idev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3119 | return; |
| 3120 | |
Bjørn Mork | cc9da6c | 2015-12-16 16:44:38 +0100 | [diff] [blame] | 3121 | /* 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 Pirko | bc91b0f | 2014-07-11 21:10:18 +0200 | [diff] [blame] | 3126 | addrconf_addr_gen(idev, false); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3127 | } |
| 3128 | |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 3129 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3130 | static void addrconf_sit_config(struct net_device *dev) |
| 3131 | { |
| 3132 | struct inet6_dev *idev; |
| 3133 | |
| 3134 | ASSERT_RTNL(); |
| 3135 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3136 | /* |
| 3137 | * Configure the tunnel with one of our IPv4 |
| 3138 | * addresses... we should configure all of |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3139 | * our v4 addrs in the tunnel |
| 3140 | */ |
| 3141 | |
Ian Morris | e5d08d7 | 2014-11-23 21:28:43 +0000 | [diff] [blame] | 3142 | idev = ipv6_find_idev(dev); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 3143 | if (!idev) { |
Joe Perches | 91df42b | 2012-05-15 14:11:54 +0000 | [diff] [blame] | 3144 | pr_debug("%s: add_dev failed\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3145 | return; |
| 3146 | } |
| 3147 | |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 3148 | if (dev->priv_flags & IFF_ISATAP) { |
Jiri Pirko | bc91b0f | 2014-07-11 21:10:18 +0200 | [diff] [blame] | 3149 | addrconf_addr_gen(idev, false); |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 3150 | return; |
| 3151 | } |
| 3152 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3153 | sit_add_v4_addrs(idev); |
| 3154 | |
Nicolas Dichtel | 62b54dd | 2012-10-01 23:19:14 +0000 | [diff] [blame] | 3155 | if (dev->flags&IFF_POINTOPOINT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3156 | addrconf_add_mroute(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3157 | } |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 3158 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3159 | |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 3160 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
stephen hemminger | aee80b5 | 2011-06-08 10:44:30 +0000 | [diff] [blame] | 3161 | static void addrconf_gre_config(struct net_device *dev) |
| 3162 | { |
| 3163 | struct inet6_dev *idev; |
stephen hemminger | aee80b5 | 2011-06-08 10:44:30 +0000 | [diff] [blame] | 3164 | |
stephen hemminger | aee80b5 | 2011-06-08 10:44:30 +0000 | [diff] [blame] | 3165 | ASSERT_RTNL(); |
| 3166 | |
Ian Morris | e5d08d7 | 2014-11-23 21:28:43 +0000 | [diff] [blame] | 3167 | idev = ipv6_find_idev(dev); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 3168 | if (!idev) { |
Joe Perches | 91df42b | 2012-05-15 14:11:54 +0000 | [diff] [blame] | 3169 | pr_debug("%s: add_dev failed\n", __func__); |
stephen hemminger | aee80b5 | 2011-06-08 10:44:30 +0000 | [diff] [blame] | 3170 | return; |
| 3171 | } |
| 3172 | |
Jiri Pirko | bc91b0f | 2014-07-11 21:10:18 +0200 | [diff] [blame] | 3173 | addrconf_addr_gen(idev, true); |
Hannes Frederic Sowa | d9e4ce6 | 2015-10-08 18:19:39 +0200 | [diff] [blame] | 3174 | if (dev->flags & IFF_POINTOPOINT) |
| 3175 | addrconf_add_mroute(dev); |
stephen hemminger | aee80b5 | 2011-06-08 10:44:30 +0000 | [diff] [blame] | 3176 | } |
| 3177 | #endif |
| 3178 | |
David Ahern | 4f25a11 | 2016-02-27 09:59:17 -0800 | [diff] [blame] | 3179 | #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 | */ |
| 3184 | static 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 |
| 3197 | static void l3mdev_check_host_rt(struct inet6_dev *idev, |
| 3198 | struct inet6_ifaddr *ifp) |
| 3199 | { |
| 3200 | } |
| 3201 | #endif |
| 3202 | |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 3203 | static int fixup_permanent_addr(struct inet6_dev *idev, |
| 3204 | struct inet6_ifaddr *ifp) |
| 3205 | { |
David Ahern | 4f25a11 | 2016-02-27 09:59:17 -0800 | [diff] [blame] | 3206 | l3mdev_check_host_rt(idev, ifp); |
| 3207 | |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 3208 | 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 | |
| 3228 | static 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 Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3254 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
Jiri Pirko | 351638e | 2013-05-28 01:30:21 +0000 | [diff] [blame] | 3255 | void *ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3256 | { |
Jiri Pirko | 351638e | 2013-05-28 01:30:21 +0000 | [diff] [blame] | 3257 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
Eric Dumazet | 748e2d9 | 2012-08-22 21:50:59 +0000 | [diff] [blame] | 3258 | struct inet6_dev *idev = __in6_dev_get(dev); |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 3259 | int run_pending = 0; |
Herbert Xu | b217d61 | 2007-07-30 17:04:52 -0700 | [diff] [blame] | 3260 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3261 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 3262 | switch (event) { |
YOSHIFUJI Hideaki | 45ba9dd | 2007-02-15 02:07:27 +0900 | [diff] [blame] | 3263 | case NETDEV_REGISTER: |
Herbert Xu | 74235a2 | 2007-06-14 13:02:55 -0700 | [diff] [blame] | 3264 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
YOSHIFUJI Hideaki | 45ba9dd | 2007-02-15 02:07:27 +0900 | [diff] [blame] | 3265 | idev = ipv6_add_dev(dev); |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 3266 | if (IS_ERR(idev)) |
| 3267 | return notifier_from_errno(PTR_ERR(idev)); |
YOSHIFUJI Hideaki | 45ba9dd | 2007-02-15 02:07:27 +0900 | [diff] [blame] | 3268 | } |
| 3269 | break; |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3270 | |
Alexander Duyck | b7b0b1d | 2015-10-26 11:06:33 -0700 | [diff] [blame] | 3271 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3297 | case NETDEV_UP: |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3298 | case NETDEV_CHANGE: |
Jay Vosburgh | c2edacf | 2007-07-09 10:42:47 -0700 | [diff] [blame] | 3299 | if (dev->flags & IFF_SLAVE) |
| 3300 | break; |
| 3301 | |
WANG Cong | 3ce62a8 | 2014-09-11 15:07:16 -0700 | [diff] [blame] | 3302 | if (idev && idev->cnf.disable_ipv6) |
| 3303 | break; |
| 3304 | |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3305 | if (event == NETDEV_UP) { |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 3306 | if (!addrconf_qdisc_ok(dev)) { |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3307 | /* device is not ready yet. */ |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 3308 | pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n", |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3309 | dev->name); |
| 3310 | break; |
| 3311 | } |
Kristian Slavov | 9908104 | 2006-02-08 16:10:53 -0800 | [diff] [blame] | 3312 | |
Evgeniy Polyakov | d31c7b8 | 2007-11-30 23:36:08 +1100 | [diff] [blame] | 3313 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
| 3314 | idev = ipv6_add_dev(dev); |
| 3315 | |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 3316 | if (!IS_ERR_OR_NULL(idev)) { |
Kristian Slavov | 9908104 | 2006-02-08 16:10:53 -0800 | [diff] [blame] | 3317 | idev->if_flags |= IF_READY; |
Benjamin Thery | e3ec6cf | 2008-11-05 01:43:57 -0800 | [diff] [blame] | 3318 | run_pending = 1; |
| 3319 | } |
Alexander Duyck | b7b0b1d | 2015-10-26 11:06:33 -0700 | [diff] [blame] | 3320 | } else if (event == NETDEV_CHANGE) { |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 3321 | if (!addrconf_qdisc_ok(dev)) { |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3322 | /* device is still not ready. */ |
| 3323 | break; |
| 3324 | } |
| 3325 | |
| 3326 | if (idev) { |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3327 | if (idev->if_flags & IF_READY) |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3328 | /* device is already configured. */ |
| 3329 | break; |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3330 | idev->if_flags |= IF_READY; |
| 3331 | } |
| 3332 | |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 3333 | pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n", |
| 3334 | dev->name); |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3335 | |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 3336 | run_pending = 1; |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3337 | } |
| 3338 | |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 3339 | /* restore routes for permanent addresses */ |
| 3340 | addrconf_permanent_addr(dev); |
| 3341 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 3342 | switch (dev->type) { |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 3343 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3344 | case ARPHRD_SIT: |
| 3345 | addrconf_sit_config(dev); |
| 3346 | break; |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 3347 | #endif |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 3348 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
stephen hemminger | aee80b5 | 2011-06-08 10:44:30 +0000 | [diff] [blame] | 3349 | case ARPHRD_IPGRE: |
| 3350 | addrconf_gre_config(dev); |
| 3351 | break; |
| 3352 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3353 | case ARPHRD_LOOPBACK: |
| 3354 | init_loopback(dev); |
| 3355 | break; |
| 3356 | |
| 3357 | default: |
| 3358 | addrconf_dev_config(dev); |
| 3359 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 3360 | } |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3361 | |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 3362 | if (!IS_ERR_OR_NULL(idev)) { |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 3363 | if (run_pending) |
| 3364 | addrconf_dad_run(idev); |
| 3365 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3366 | /* |
| 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3370 | */ |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3371 | if (idev->cnf.mtu6 != dev->mtu && |
| 3372 | dev->mtu >= IPV6_MIN_MTU) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3373 | 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 Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3378 | |
| 3379 | /* |
| 3380 | * If the changed mtu during down is lower than |
| 3381 | * IPV6_MIN_MTU stop IPv6 on this interface. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3382 | */ |
| 3383 | if (dev->mtu < IPV6_MIN_MTU) |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3384 | addrconf_ifdown(dev, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3385 | } |
| 3386 | break; |
| 3387 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3388 | 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 Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3395 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3396 | case NETDEV_CHANGENAME: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3397 | if (idev) { |
Stephen Hemminger | 5632c51 | 2007-04-28 21:16:39 -0700 | [diff] [blame] | 3398 | snmp6_unregister_dev(idev); |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 3399 | addrconf_sysctl_unregister(idev); |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 3400 | err = addrconf_sysctl_register(idev); |
Herbert Xu | b217d61 | 2007-07-30 17:04:52 -0700 | [diff] [blame] | 3401 | if (err) |
| 3402 | return notifier_from_errno(err); |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 3403 | err = snmp6_register_dev(idev); |
| 3404 | if (err) { |
| 3405 | addrconf_sysctl_unregister(idev); |
| 3406 | return notifier_from_errno(err); |
| 3407 | } |
Stephen Hemminger | 5632c51 | 2007-04-28 21:16:39 -0700 | [diff] [blame] | 3408 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3409 | break; |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3410 | |
Jiri Pirko | 93d9b7d | 2010-03-10 10:28:56 +0000 | [diff] [blame] | 3411 | case NETDEV_PRE_TYPE_CHANGE: |
| 3412 | case NETDEV_POST_TYPE_CHANGE: |
Andrew Lunn | 3ef0952 | 2015-12-03 21:12:32 +0100 | [diff] [blame] | 3413 | if (idev) |
| 3414 | addrconf_type_change(dev, event); |
Moni Shoua | 75c7850 | 2009-09-15 02:37:40 -0700 | [diff] [blame] | 3415 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 3416 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3417 | |
| 3418 | return NOTIFY_OK; |
| 3419 | } |
| 3420 | |
| 3421 | /* |
| 3422 | * addrconf module should be notified of a device going up |
| 3423 | */ |
| 3424 | static struct notifier_block ipv6_dev_notf = { |
| 3425 | .notifier_call = addrconf_notify, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3426 | }; |
| 3427 | |
Jiri Pirko | 93d9b7d | 2010-03-10 10:28:56 +0000 | [diff] [blame] | 3428 | static void addrconf_type_change(struct net_device *dev, unsigned long event) |
Moni Shoua | 75c7850 | 2009-09-15 02:37:40 -0700 | [diff] [blame] | 3429 | { |
| 3430 | struct inet6_dev *idev; |
| 3431 | ASSERT_RTNL(); |
| 3432 | |
| 3433 | idev = __in6_dev_get(dev); |
| 3434 | |
Jiri Pirko | 93d9b7d | 2010-03-10 10:28:56 +0000 | [diff] [blame] | 3435 | if (event == NETDEV_POST_TYPE_CHANGE) |
Moni Shoua | 75c7850 | 2009-09-15 02:37:40 -0700 | [diff] [blame] | 3436 | ipv6_mc_remap(idev); |
Jiri Pirko | 93d9b7d | 2010-03-10 10:28:56 +0000 | [diff] [blame] | 3437 | else if (event == NETDEV_PRE_TYPE_CHANGE) |
Moni Shoua | 75c7850 | 2009-09-15 02:37:40 -0700 | [diff] [blame] | 3438 | ipv6_mc_unmap(idev); |
| 3439 | } |
| 3440 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3441 | static int addrconf_ifdown(struct net_device *dev, int how) |
| 3442 | { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 3443 | struct net *net = dev_net(dev); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 3444 | struct inet6_dev *idev; |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 3445 | struct inet6_ifaddr *ifa, *tmp; |
| 3446 | struct list_head del_list; |
| 3447 | int _keep_addr; |
| 3448 | bool keep_addr; |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3449 | int state, i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3450 | |
| 3451 | ASSERT_RTNL(); |
| 3452 | |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3453 | rt6_ifdown(net, dev); |
| 3454 | neigh_ifdown(&nd_tbl, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3455 | |
| 3456 | idev = __in6_dev_get(dev); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 3457 | if (!idev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3458 | return -ENODEV; |
| 3459 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3460 | /* |
| 3461 | * Step 1: remove reference to ipv6 device from parent device. |
| 3462 | * Do not dev_put! |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3463 | */ |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 3464 | if (how) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3465 | idev->dead = 1; |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 3466 | |
| 3467 | /* protected by rtnl_lock */ |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 3468 | RCU_INIT_POINTER(dev->ip6_ptr, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3469 | |
| 3470 | /* Step 1.5: remove snmp6 entry */ |
| 3471 | snmp6_unregister_dev(idev); |
| 3472 | |
| 3473 | } |
| 3474 | |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 3475 | /* 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. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3485 | /* 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. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3488 | |
| 3489 | spin_lock_bh(&addrconf_hash_lock); |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 3490 | restart: |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 3491 | hlist_for_each_entry_rcu(ifa, h, addr_lst) { |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3492 | if (ifa->idev == idev) { |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3493 | addrconf_del_dad_work(ifa); |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 3494 | /* 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. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3502 | } |
| 3503 | } |
| 3504 | spin_unlock_bh(&addrconf_hash_lock); |
| 3505 | } |
| 3506 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3507 | write_lock_bh(&idev->lock); |
| 3508 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3509 | addrconf_del_rs_timer(idev); |
| 3510 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3511 | /* Step 2: clear flags for stateless addrconf */ |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 3512 | if (!how) |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3513 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3514 | |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 3515 | if (how && del_timer(&idev->regen_timer)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3516 | in6_dev_put(idev); |
| 3517 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3518 | /* Step 3: clear tempaddr list */ |
stephen hemminger | 372e6c8 | 2010-03-17 20:31:09 +0000 | [diff] [blame] | 3519 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3523 | 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 hemminger | 8f37ada | 2010-03-03 08:19:59 +0000 | [diff] [blame] | 3534 | |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 3535 | /* 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 Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3542 | addrconf_del_dad_work(ifa); |
stephen hemminger | 84e8b80 | 2010-03-02 13:32:46 +0000 | [diff] [blame] | 3543 | |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3544 | write_unlock_bh(&idev->lock); |
Hannes Frederic Sowa | 8e8e676 | 2015-03-23 23:36:03 +0100 | [diff] [blame] | 3545 | spin_lock_bh(&ifa->lock); |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 3546 | |
| 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 Sowa | 8e8e676 | 2015-03-23 23:36:03 +0100 | [diff] [blame] | 3561 | spin_unlock_bh(&ifa->lock); |
stephen hemminger | 84e8b80 | 2010-03-02 13:32:46 +0000 | [diff] [blame] | 3562 | |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3563 | if (state != INET6_IFADDR_STATE_DEAD) { |
| 3564 | __ipv6_ifa_notify(RTM_DELADDR, ifa); |
Cong Wang | f88c91d | 2013-04-14 23:18:43 +0800 | [diff] [blame] | 3565 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifa); |
stephen hemminger | 27bdb2a | 2010-04-12 05:41:32 +0000 | [diff] [blame] | 3566 | } |
stephen hemminger | 8f37ada | 2010-03-03 08:19:59 +0000 | [diff] [blame] | 3567 | |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3568 | write_lock_bh(&idev->lock); |
| 3569 | } |
stephen hemminger | 8f37ada | 2010-03-03 08:19:59 +0000 | [diff] [blame] | 3570 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3571 | write_unlock_bh(&idev->lock); |
| 3572 | |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 3573 | /* 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 Dubroca | 381f4dc | 2014-09-10 23:23:02 +0200 | [diff] [blame] | 3582 | /* Step 5: Discard anycast and multicast list */ |
| 3583 | if (how) { |
| 3584 | ipv6_ac_destroy_dev(idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3585 | ipv6_mc_destroy_dev(idev); |
Sabrina Dubroca | 381f4dc | 2014-09-10 23:23:02 +0200 | [diff] [blame] | 3586 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3587 | ipv6_mc_down(idev); |
Sabrina Dubroca | 381f4dc | 2014-09-10 23:23:02 +0200 | [diff] [blame] | 3588 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3589 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3590 | idev->tstamp = jiffies; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3591 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3592 | /* Last: Shot the device (if unregistered) */ |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 3593 | if (how) { |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 3594 | addrconf_sysctl_unregister(idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3595 | 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 | |
| 3602 | static void addrconf_rs_timer(unsigned long data) |
| 3603 | { |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3604 | struct inet6_dev *idev = (struct inet6_dev *)data; |
Cong Wang | caf92bc | 2013-08-31 13:44:32 +0800 | [diff] [blame] | 3605 | struct net_device *dev = idev->dev; |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3606 | struct in6_addr lladdr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3607 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3608 | write_lock(&idev->lock); |
stephen hemminger | 5b2a195 | 2010-03-02 13:32:45 +0000 | [diff] [blame] | 3609 | if (idev->dead || !(idev->if_flags & IF_READY)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3610 | goto out; |
| 3611 | |
Shmulik Ladkani | 9ba2add | 2012-12-02 01:44:53 +0000 | [diff] [blame] | 3612 | if (!ipv6_accept_ra(idev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3613 | goto out; |
stephen hemminger | 5b2a195 | 2010-03-02 13:32:45 +0000 | [diff] [blame] | 3614 | |
| 3615 | /* Announcement received after solicitation was sent */ |
| 3616 | if (idev->if_flags & IF_RA_RCVD) |
| 3617 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3618 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3619 | if (idev->rs_probes++ < idev->cnf.rtr_solicits) { |
Cong Wang | caf92bc | 2013-08-31 13:44:32 +0800 | [diff] [blame] | 3620 | write_unlock(&idev->lock); |
| 3621 | if (!ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) |
| 3622 | ndisc_send_rs(dev, &lladdr, |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3623 | &in6addr_linklocal_allrouters); |
| 3624 | else |
Cong Wang | caf92bc | 2013-08-31 13:44:32 +0800 | [diff] [blame] | 3625 | goto put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3626 | |
Cong Wang | caf92bc | 2013-08-31 13:44:32 +0800 | [diff] [blame] | 3627 | write_lock(&idev->lock); |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3628 | /* 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3633 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3634 | /* |
| 3635 | * Note: we do not support deprecated "all on-link" |
| 3636 | * assumption any longer. |
| 3637 | */ |
Joe Perches | 91df42b | 2012-05-15 14:11:54 +0000 | [diff] [blame] | 3638 | pr_debug("%s: no IPv6 routers present\n", idev->dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3639 | } |
| 3640 | |
| 3641 | out: |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3642 | write_unlock(&idev->lock); |
Cong Wang | caf92bc | 2013-08-31 13:44:32 +0800 | [diff] [blame] | 3643 | put: |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3644 | in6_dev_put(idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3645 | } |
| 3646 | |
| 3647 | /* |
| 3648 | * Duplicate Address Detection |
| 3649 | */ |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3650 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
| 3651 | { |
| 3652 | unsigned long rand_num; |
| 3653 | struct inet6_dev *idev = ifp->idev; |
| 3654 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 3655 | if (ifp->flags & IFA_F_OPTIMISTIC) |
| 3656 | rand_num = 0; |
| 3657 | else |
Aruna-Hewapathirane | 63862b5 | 2014-01-11 07:15:59 -0500 | [diff] [blame] | 3658 | rand_num = prandom_u32() % (idev->cnf.rtr_solicit_delay ? : 1); |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 3659 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3660 | ifp->dad_probes = idev->cnf.dad_transmits; |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3661 | addrconf_mod_dad_work(ifp, rand_num); |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3662 | } |
| 3663 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3664 | static void addrconf_dad_begin(struct inet6_ifaddr *ifp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3665 | { |
| 3666 | struct inet6_dev *idev = ifp->idev; |
| 3667 | struct net_device *dev = idev->dev; |
subashab@codeaurora.org | 16186a8 | 2016-02-02 02:11:10 +0000 | [diff] [blame] | 3668 | bool notify = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3669 | |
| 3670 | addrconf_join_solict(dev, &ifp->addr); |
| 3671 | |
Aruna-Hewapathirane | 63862b5 | 2014-01-11 07:15:59 -0500 | [diff] [blame] | 3672 | prandom_seed((__force u32) ifp->addr.s6_addr32[3]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3673 | |
| 3674 | read_lock_bh(&idev->lock); |
Herbert Xu | 622ccdf | 2010-05-18 15:56:06 -0700 | [diff] [blame] | 3675 | spin_lock(&ifp->lock); |
Herbert Xu | e9d3e08 | 2010-05-18 15:36:06 -0700 | [diff] [blame] | 3676 | if (ifp->state == INET6_IFADDR_STATE_DEAD) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3677 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3678 | |
| 3679 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 3680 | idev->cnf.accept_dad < 1 || |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 3681 | !(ifp->flags&IFA_F_TENTATIVE) || |
| 3682 | ifp->flags & IFA_F_NODAD) { |
Brian Haley | cc411d0 | 2009-09-09 14:41:32 +0000 | [diff] [blame] | 3683 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 3684 | spin_unlock(&ifp->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3685 | read_unlock_bh(&idev->lock); |
| 3686 | |
| 3687 | addrconf_dad_completed(ifp); |
| 3688 | return; |
| 3689 | } |
| 3690 | |
YOSHIFUJI Hideaki | 6732bad | 2005-12-27 13:35:15 -0800 | [diff] [blame] | 3691 | if (!(idev->if_flags & IF_READY)) { |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 3692 | spin_unlock(&ifp->lock); |
YOSHIFUJI Hideaki | 6732bad | 2005-12-27 13:35:15 -0800 | [diff] [blame] | 3693 | read_unlock_bh(&idev->lock); |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3694 | /* |
Masatake YAMATO | 590a988 | 2009-06-09 10:41:12 +0900 | [diff] [blame] | 3695 | * If the device is not ready: |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3696 | * - keep it tentative if it is a permanent address. |
| 3697 | * - otherwise, kill it. |
| 3698 | */ |
| 3699 | in6_ifa_hold(ifp); |
Brian Haley | cc411d0 | 2009-09-09 14:41:32 +0000 | [diff] [blame] | 3700 | addrconf_dad_stop(ifp, 0); |
YOSHIFUJI Hideaki | 6732bad | 2005-12-27 13:35:15 -0800 | [diff] [blame] | 3701 | return; |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3702 | } |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 3703 | |
| 3704 | /* |
| 3705 | * Optimistic nodes can start receiving |
| 3706 | * Frames right away |
| 3707 | */ |
Erik Kline | 7fd2561 | 2014-10-28 18:11:14 +0900 | [diff] [blame] | 3708 | if (ifp->flags & IFA_F_OPTIMISTIC) { |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 3709 | ip6_ins_rt(ifp->rt); |
Erik Kline | 7fd2561 | 2014-10-28 18:11:14 +0900 | [diff] [blame] | 3710 | 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.org | 16186a8 | 2016-02-02 02:11:10 +0000 | [diff] [blame] | 3714 | notify = true; |
Erik Kline | 7fd2561 | 2014-10-28 18:11:14 +0900 | [diff] [blame] | 3715 | } |
| 3716 | } |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 3717 | |
YOSHIFUJI Hideaki | 6732bad | 2005-12-27 13:35:15 -0800 | [diff] [blame] | 3718 | addrconf_dad_kick(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3719 | out: |
Herbert Xu | 622ccdf | 2010-05-18 15:56:06 -0700 | [diff] [blame] | 3720 | spin_unlock(&ifp->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3721 | read_unlock_bh(&idev->lock); |
subashab@codeaurora.org | 16186a8 | 2016-02-02 02:11:10 +0000 | [diff] [blame] | 3722 | if (notify) |
| 3723 | ipv6_ifa_notify(RTM_NEWADDR, ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3724 | } |
| 3725 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3726 | static void addrconf_dad_start(struct inet6_ifaddr *ifp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3727 | { |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3728 | bool begin_dad = false; |
| 3729 | |
Hannes Frederic Sowa | 8e8e676 | 2015-03-23 23:36:03 +0100 | [diff] [blame] | 3730 | spin_lock_bh(&ifp->lock); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3731 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
| 3732 | ifp->state = INET6_IFADDR_STATE_PREDAD; |
| 3733 | begin_dad = true; |
| 3734 | } |
Hannes Frederic Sowa | 8e8e676 | 2015-03-23 23:36:03 +0100 | [diff] [blame] | 3735 | spin_unlock_bh(&ifp->lock); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3736 | |
| 3737 | if (begin_dad) |
| 3738 | addrconf_mod_dad_work(ifp, 0); |
| 3739 | } |
| 3740 | |
| 3741 | static 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3746 | struct inet6_dev *idev = ifp->idev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3747 | struct in6_addr mcaddr; |
| 3748 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3749 | enum { |
| 3750 | DAD_PROCESS, |
| 3751 | DAD_BEGIN, |
| 3752 | DAD_ABORT, |
| 3753 | } action = DAD_PROCESS; |
| 3754 | |
| 3755 | rtnl_lock(); |
| 3756 | |
Hannes Frederic Sowa | 8e8e676 | 2015-03-23 23:36:03 +0100 | [diff] [blame] | 3757 | spin_lock_bh(&ifp->lock); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3758 | 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 Sowa | 8e8e676 | 2015-03-23 23:36:03 +0100 | [diff] [blame] | 3765 | spin_unlock_bh(&ifp->lock); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3766 | |
| 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 Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3775 | if (!ifp->dad_probes && addrconf_dad_end(ifp)) |
Herbert Xu | f2344a1 | 2010-05-18 15:55:27 -0700 | [diff] [blame] | 3776 | goto out; |
| 3777 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3778 | write_lock_bh(&idev->lock); |
stephen hemminger | 122e451 | 2010-03-02 13:32:44 +0000 | [diff] [blame] | 3779 | if (idev->dead || !(idev->if_flags & IF_READY)) { |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3780 | write_unlock_bh(&idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3781 | goto out; |
| 3782 | } |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 3783 | |
| 3784 | spin_lock(&ifp->lock); |
Herbert Xu | 622ccdf | 2010-05-18 15:56:06 -0700 | [diff] [blame] | 3785 | if (ifp->state == INET6_IFADDR_STATE_DEAD) { |
| 3786 | spin_unlock(&ifp->lock); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3787 | write_unlock_bh(&idev->lock); |
Herbert Xu | 622ccdf | 2010-05-18 15:56:06 -0700 | [diff] [blame] | 3788 | goto out; |
| 3789 | } |
| 3790 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3791 | if (ifp->dad_probes == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3792 | /* |
| 3793 | * DAD was successful |
| 3794 | */ |
| 3795 | |
Brian Haley | cc411d0 | 2009-09-09 14:41:32 +0000 | [diff] [blame] | 3796 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 3797 | spin_unlock(&ifp->lock); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3798 | write_unlock_bh(&idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3799 | |
| 3800 | addrconf_dad_completed(ifp); |
| 3801 | |
| 3802 | goto out; |
| 3803 | } |
| 3804 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3805 | ifp->dad_probes--; |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3806 | addrconf_mod_dad_work(ifp, |
| 3807 | NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME)); |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 3808 | spin_unlock(&ifp->lock); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3809 | write_unlock_bh(&idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3810 | |
| 3811 | /* send a neighbour solicitation for our addr */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3812 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
Nicolas Dichtel | 304d888 | 2015-11-27 18:17:05 +0100 | [diff] [blame] | 3813 | ndisc_send_ns(ifp->idev->dev, &ifp->addr, &mcaddr, &in6addr_any); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3814 | out: |
| 3815 | in6_ifa_put(ifp); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3816 | rtnl_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3817 | } |
| 3818 | |
Hannes Frederic Sowa | 11ffff7 | 2014-01-16 20:13:04 +0100 | [diff] [blame] | 3819 | /* ifp->idev must be at least read locked */ |
| 3820 | static bool ipv6_lonely_lladdr(struct inet6_ifaddr *ifp) |
| 3821 | { |
| 3822 | struct inet6_ifaddr *ifpiter; |
| 3823 | struct inet6_dev *idev = ifp->idev; |
| 3824 | |
Hannes Frederic Sowa | 602582c | 2014-01-19 21:58:19 +0100 | [diff] [blame] | 3825 | list_for_each_entry_reverse(ifpiter, &idev->addr_list, if_list) { |
| 3826 | if (ifpiter->scope > IFA_LINK) |
| 3827 | break; |
Hannes Frederic Sowa | 11ffff7 | 2014-01-16 20:13:04 +0100 | [diff] [blame] | 3828 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3837 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) |
| 3838 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 3839 | struct net_device *dev = ifp->idev->dev; |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3840 | struct in6_addr lladdr; |
Hannes Frederic Sowa | b173ee4 | 2013-06-27 00:07:01 +0200 | [diff] [blame] | 3841 | bool send_rs, send_mld; |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3842 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3843 | addrconf_del_dad_work(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3844 | |
| 3845 | /* |
| 3846 | * Configure the address for reception. Now it is valid. |
| 3847 | */ |
| 3848 | |
| 3849 | ipv6_ifa_notify(RTM_NEWADDR, ifp); |
| 3850 | |
Tore Anderson | 026359b | 2011-08-28 23:47:33 +0000 | [diff] [blame] | 3851 | /* If added prefix is link local and we are prepared to process |
| 3852 | router advertisements, start sending router solicitations. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3853 | */ |
| 3854 | |
Hannes Frederic Sowa | 1ec047e | 2013-06-27 00:06:56 +0200 | [diff] [blame] | 3855 | read_lock_bh(&ifp->idev->lock); |
Hannes Frederic Sowa | 11ffff7 | 2014-01-16 20:13:04 +0100 | [diff] [blame] | 3856 | send_mld = ifp->scope == IFA_LINK && ipv6_lonely_lladdr(ifp); |
Hannes Frederic Sowa | b173ee4 | 2013-06-27 00:07:01 +0200 | [diff] [blame] | 3857 | send_rs = send_mld && |
| 3858 | ipv6_accept_ra(ifp->idev) && |
Hannes Frederic Sowa | 1ec047e | 2013-06-27 00:06:56 +0200 | [diff] [blame] | 3859 | ifp->idev->cnf.rtr_solicits > 0 && |
Hannes Frederic Sowa | b173ee4 | 2013-06-27 00:07:01 +0200 | [diff] [blame] | 3860 | (dev->flags&IFF_LOOPBACK) == 0; |
Hannes Frederic Sowa | 1ec047e | 2013-06-27 00:06:56 +0200 | [diff] [blame] | 3861 | read_unlock_bh(&ifp->idev->lock); |
| 3862 | |
Hannes Frederic Sowa | b173ee4 | 2013-06-27 00:07:01 +0200 | [diff] [blame] | 3863 | /* 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 Sowa | 1ec047e | 2013-06-27 00:06:56 +0200 | [diff] [blame] | 3869 | if (send_rs) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3870 | /* |
| 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 Sowa | 1ec047e | 2013-06-27 00:06:56 +0200 | [diff] [blame] | 3875 | if (ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3876 | return; |
Hannes Frederic Sowa | 1ec047e | 2013-06-27 00:06:56 +0200 | [diff] [blame] | 3877 | ndisc_send_rs(dev, &lladdr, &in6addr_linklocal_allrouters); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3878 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3879 | write_lock_bh(&ifp->idev->lock); |
| 3880 | spin_lock(&ifp->lock); |
| 3881 | ifp->idev->rs_probes = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3882 | ifp->idev->if_flags |= IF_RS_SENT; |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3883 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3887 | } |
| 3888 | } |
| 3889 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 3890 | static void addrconf_dad_run(struct inet6_dev *idev) |
| 3891 | { |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 3892 | struct inet6_ifaddr *ifp; |
| 3893 | |
| 3894 | read_lock_bh(&idev->lock); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 3895 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 3896 | spin_lock(&ifp->lock); |
Herbert Xu | f2344a1 | 2010-05-18 15:55:27 -0700 | [diff] [blame] | 3897 | if (ifp->flags & IFA_F_TENTATIVE && |
| 3898 | ifp->state == INET6_IFADDR_STATE_DAD) |
| 3899 | addrconf_dad_kick(ifp); |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 3900 | spin_unlock(&ifp->lock); |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 3901 | } |
| 3902 | read_unlock_bh(&idev->lock); |
| 3903 | } |
| 3904 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3905 | #ifdef CONFIG_PROC_FS |
| 3906 | struct if6_iter_state { |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 3907 | struct seq_net_private p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3908 | int bucket; |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3909 | int offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3910 | }; |
| 3911 | |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3912 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3913 | { |
| 3914 | struct inet6_ifaddr *ifa = NULL; |
| 3915 | struct if6_iter_state *state = seq->private; |
YOSHIFUJI Hideaki | 1218854 | 2008-03-26 02:36:06 +0900 | [diff] [blame] | 3916 | struct net *net = seq_file_net(seq); |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3917 | int p = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3918 | |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3919 | /* 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 Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 3926 | hlist_for_each_entry_rcu_bh(ifa, &inet6_addr_lst[state->bucket], |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3927 | addr_lst) { |
Eric Dumazet | 9f0d3c2 | 2012-10-16 07:37:27 +0000 | [diff] [blame] | 3928 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
| 3929 | continue; |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3930 | /* sync with offset */ |
| 3931 | if (p < state->offset) { |
| 3932 | p++; |
| 3933 | continue; |
| 3934 | } |
| 3935 | state->offset++; |
Eric Dumazet | 9f0d3c2 | 2012-10-16 07:37:27 +0000 | [diff] [blame] | 3936 | return ifa; |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3937 | } |
| 3938 | |
| 3939 | /* prepare for next bucket */ |
| 3940 | state->offset = 0; |
| 3941 | p = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3942 | } |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 3943 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3944 | } |
| 3945 | |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 3946 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, |
| 3947 | struct inet6_ifaddr *ifa) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3948 | { |
| 3949 | struct if6_iter_state *state = seq->private; |
YOSHIFUJI Hideaki | 1218854 | 2008-03-26 02:36:06 +0900 | [diff] [blame] | 3950 | struct net *net = seq_file_net(seq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3951 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 3952 | hlist_for_each_entry_continue_rcu_bh(ifa, addr_lst) { |
Eric Dumazet | 9f0d3c2 | 2012-10-16 07:37:27 +0000 | [diff] [blame] | 3953 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
| 3954 | continue; |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3955 | state->offset++; |
Eric Dumazet | 9f0d3c2 | 2012-10-16 07:37:27 +0000 | [diff] [blame] | 3956 | return ifa; |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3957 | } |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 3958 | |
| 3959 | while (++state->bucket < IN6_ADDR_HSIZE) { |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3960 | state->offset = 0; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 3961 | hlist_for_each_entry_rcu_bh(ifa, |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 3962 | &inet6_addr_lst[state->bucket], addr_lst) { |
Eric Dumazet | 9f0d3c2 | 2012-10-16 07:37:27 +0000 | [diff] [blame] | 3963 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
| 3964 | continue; |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3965 | state->offset++; |
Eric Dumazet | 9f0d3c2 | 2012-10-16 07:37:27 +0000 | [diff] [blame] | 3966 | return ifa; |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 3967 | } |
| 3968 | } |
| 3969 | |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 3970 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3971 | } |
| 3972 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3973 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) |
Eric Dumazet | 4f70ecc | 2010-05-03 10:50:14 +0000 | [diff] [blame] | 3974 | __acquires(rcu_bh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3975 | { |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 3976 | rcu_read_lock_bh(); |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3977 | return if6_get_first(seq, *pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3978 | } |
| 3979 | |
| 3980 | static 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 | |
| 3989 | static void if6_seq_stop(struct seq_file *seq, void *v) |
Eric Dumazet | 4f70ecc | 2010-05-03 10:50:14 +0000 | [diff] [blame] | 3990 | __releases(rcu_bh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3991 | { |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 3992 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3993 | } |
| 3994 | |
| 3995 | static int if6_seq_show(struct seq_file *seq, void *v) |
| 3996 | { |
| 3997 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; |
Jiri Pirko | 971a351 | 2013-12-10 13:56:29 +0100 | [diff] [blame] | 3998 | seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", |
Harvey Harrison | b071195 | 2008-10-28 16:05:40 -0700 | [diff] [blame] | 3999 | &ifp->addr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4000 | ifp->idev->dev->ifindex, |
| 4001 | ifp->prefix_len, |
| 4002 | ifp->scope, |
Jiri Pirko | 971a351 | 2013-12-10 13:56:29 +0100 | [diff] [blame] | 4003 | (u8) ifp->flags, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4004 | ifp->idev->dev->name); |
| 4005 | return 0; |
| 4006 | } |
| 4007 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 4008 | static const struct seq_operations if6_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4009 | .start = if6_seq_start, |
| 4010 | .next = if6_seq_next, |
| 4011 | .show = if6_seq_show, |
| 4012 | .stop = if6_seq_stop, |
| 4013 | }; |
| 4014 | |
| 4015 | static int if6_seq_open(struct inode *inode, struct file *file) |
| 4016 | { |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 4017 | return seq_open_net(inode, file, &if6_seq_ops, |
| 4018 | sizeof(struct if6_iter_state)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4019 | } |
| 4020 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 4021 | static const struct file_operations if6_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4022 | .owner = THIS_MODULE, |
| 4023 | .open = if6_seq_open, |
| 4024 | .read = seq_read, |
| 4025 | .llseek = seq_lseek, |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 4026 | .release = seq_release_net, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4027 | }; |
| 4028 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 4029 | static int __net_init if6_proc_net_init(struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4030 | { |
Gao feng | d4beaa6 | 2013-02-18 01:34:54 +0000 | [diff] [blame] | 4031 | if (!proc_create("if_inet6", S_IRUGO, net->proc_net, &if6_fops)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4032 | return -ENOMEM; |
| 4033 | return 0; |
| 4034 | } |
| 4035 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 4036 | static void __net_exit if6_proc_net_exit(struct net *net) |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 4037 | { |
Gao feng | ece31ff | 2013-02-18 01:34:56 +0000 | [diff] [blame] | 4038 | remove_proc_entry("if_inet6", net->proc_net); |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 4039 | } |
| 4040 | |
| 4041 | static struct pernet_operations if6_proc_net_ops = { |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 4042 | .init = if6_proc_net_init, |
| 4043 | .exit = if6_proc_net_exit, |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 4044 | }; |
| 4045 | |
| 4046 | int __init if6_proc_init(void) |
| 4047 | { |
| 4048 | return register_pernet_subsys(&if6_proc_net_ops); |
| 4049 | } |
| 4050 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4051 | void if6_proc_exit(void) |
| 4052 | { |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 4053 | unregister_pernet_subsys(&if6_proc_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4054 | } |
| 4055 | #endif /* CONFIG_PROC_FS */ |
| 4056 | |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 4057 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 4058 | /* Check if address is a home address configured on any interface. */ |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 4059 | int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr) |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 4060 | { |
| 4061 | int ret = 0; |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 4062 | struct inet6_ifaddr *ifp = NULL; |
Eric Dumazet | ddbe503 | 2012-07-18 08:11:12 +0000 | [diff] [blame] | 4063 | unsigned int hash = inet6_addr_hash(addr); |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 4064 | |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 4065 | rcu_read_lock_bh(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 4066 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) { |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 4067 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
Daniel Lezcano | 389f661 | 2008-01-10 22:44:40 -0800 | [diff] [blame] | 4068 | continue; |
YOSHIFUJI Hideaki | caad295 | 2008-04-10 15:42:07 +0900 | [diff] [blame] | 4069 | if (ipv6_addr_equal(&ifp->addr, addr) && |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 4070 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
| 4071 | ret = 1; |
| 4072 | break; |
| 4073 | } |
| 4074 | } |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 4075 | rcu_read_unlock_bh(); |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 4076 | return ret; |
| 4077 | } |
| 4078 | #endif |
| 4079 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4080 | /* |
| 4081 | * Periodic address status verification |
| 4082 | */ |
| 4083 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 4084 | static void addrconf_verify_rtnl(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4085 | { |
YOSHIFUJI Hideaki | b2db756 | 2010-03-20 16:11:12 -0700 | [diff] [blame] | 4086 | unsigned long now, next, next_sec, next_sched; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4087 | struct inet6_ifaddr *ifp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4088 | int i; |
| 4089 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 4090 | ASSERT_RTNL(); |
| 4091 | |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 4092 | rcu_read_lock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4093 | now = jiffies; |
YOSHIFUJI Hideaki | b2db756 | 2010-03-20 16:11:12 -0700 | [diff] [blame] | 4094 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4095 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 4096 | cancel_delayed_work(&addr_chk_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4097 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 4098 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4099 | restart: |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 4100 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[i], addr_lst) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4101 | unsigned long age; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4102 | |
Yasushi Asano | fad8da3 | 2013-12-31 12:04:19 +0900 | [diff] [blame] | 4103 | /* 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4109 | continue; |
| 4110 | |
| 4111 | spin_lock(&ifp->lock); |
YOSHIFUJI Hideaki | b2db756 | 2010-03-20 16:11:12 -0700 | [diff] [blame] | 4112 | /* We try to batch several events at once. */ |
| 4113 | age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4114 | |
YOSHIFUJI Hideaki | 8f27ebb | 2006-07-28 18:12:11 +0900 | [diff] [blame] | 4115 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
| 4116 | age >= ifp->valid_lft) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4117 | spin_unlock(&ifp->lock); |
| 4118 | in6_ifa_hold(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4119 | ipv6_del_addr(ifp); |
| 4120 | goto restart; |
YOSHIFUJI Hideaki | 8f27ebb | 2006-07-28 18:12:11 +0900 | [diff] [blame] | 4121 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
| 4122 | spin_unlock(&ifp->lock); |
| 4123 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4124 | } else if (age >= ifp->prefered_lft) { |
Brian Haley | a1ed052 | 2009-07-02 07:10:52 +0000 | [diff] [blame] | 4125 | /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4126 | int deprecate = 0; |
| 4127 | |
| 4128 | if (!(ifp->flags&IFA_F_DEPRECATED)) { |
| 4129 | deprecate = 1; |
| 4130 | ifp->flags |= IFA_F_DEPRECATED; |
| 4131 | } |
| 4132 | |
Yasushi Asano | fad8da3 | 2013-12-31 12:04:19 +0900 | [diff] [blame] | 4133 | if ((ifp->valid_lft != INFINITY_LIFE_TIME) && |
| 4134 | (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4135 | next = ifp->tstamp + ifp->valid_lft * HZ; |
| 4136 | |
| 4137 | spin_unlock(&ifp->lock); |
| 4138 | |
| 4139 | if (deprecate) { |
| 4140 | in6_ifa_hold(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4141 | |
| 4142 | ipv6_ifa_notify(0, ifp); |
| 4143 | in6_ifa_put(ifp); |
| 4144 | goto restart; |
| 4145 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4146 | } else if ((ifp->flags&IFA_F_TEMPORARY) && |
| 4147 | !(ifp->flags&IFA_F_TENTATIVE)) { |
stephen hemminger | 88949cf | 2010-03-17 20:31:17 +0000 | [diff] [blame] | 4148 | unsigned long regen_advance = ifp->idev->cnf.regen_max_retry * |
| 4149 | ifp->idev->cnf.dad_transmits * |
Jiri Pirko | 1f9248e5 | 2013-12-07 19:26:53 +0100 | [diff] [blame] | 4150 | NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME) / HZ; |
stephen hemminger | 88949cf | 2010-03-17 20:31:17 +0000 | [diff] [blame] | 4151 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4152 | 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 hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 4161 | |
Hiroyuki YAMAMORI | 291d809 | 2005-12-23 11:24:05 -0800 | [diff] [blame] | 4162 | spin_lock(&ifpub->lock); |
| 4163 | ifpub->regen_count = 0; |
| 4164 | spin_unlock(&ifpub->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4165 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4173 | } 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4180 | } |
| 4181 | |
YOSHIFUJI Hideaki | b2db756 | 2010-03-20 16:11:12 -0700 | [diff] [blame] | 4182 | 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 | |
dingtianhong | ba3542e | 2013-08-17 10:27:04 +0800 | [diff] [blame] | 4193 | ADBG(KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n", |
| 4194 | now, next, next_sec, next_sched); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 4195 | mod_delayed_work(addrconf_wq, &addr_chk_work, next_sched - now); |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 4196 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4197 | } |
| 4198 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 4199 | static void addrconf_verify_work(struct work_struct *w) |
| 4200 | { |
| 4201 | rtnl_lock(); |
| 4202 | addrconf_verify_rtnl(); |
| 4203 | rtnl_unlock(); |
| 4204 | } |
| 4205 | |
| 4206 | static void addrconf_verify(void) |
| 4207 | { |
| 4208 | mod_delayed_work(addrconf_wq, &addr_chk_work, 0); |
| 4209 | } |
| 4210 | |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4211 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local, |
| 4212 | struct in6_addr **peer_pfx) |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 4213 | { |
| 4214 | struct in6_addr *pfx = NULL; |
| 4215 | |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4216 | *peer_pfx = NULL; |
| 4217 | |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 4218 | if (addr) |
| 4219 | pfx = nla_data(addr); |
| 4220 | |
| 4221 | if (local) { |
| 4222 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4223 | *peer_pfx = pfx; |
| 4224 | pfx = nla_data(local); |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 4225 | } |
| 4226 | |
| 4227 | return pfx; |
| 4228 | } |
| 4229 | |
Patrick McHardy | ef7c79e | 2007-06-05 12:38:30 -0700 | [diff] [blame] | 4230 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 4231 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
| 4232 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, |
| 4233 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, |
Jiri Pirko | 479840f | 2013-12-06 09:45:21 +0100 | [diff] [blame] | 4234 | [IFA_FLAGS] = { .len = sizeof(u32) }, |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 4235 | }; |
| 4236 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4237 | static int |
Thomas Graf | 661d296 | 2013-03-21 07:45:29 +0000 | [diff] [blame] | 4238 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4239 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 4240 | struct net *net = sock_net(skb->sk); |
Thomas Graf | b933f71 | 2006-09-18 00:10:19 -0700 | [diff] [blame] | 4241 | struct ifaddrmsg *ifm; |
| 4242 | struct nlattr *tb[IFA_MAX+1]; |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4243 | struct in6_addr *pfx, *peer_pfx; |
Heiner Kallweit | 6046d5b | 2014-04-20 21:29:36 +0200 | [diff] [blame] | 4244 | u32 ifa_flags; |
Thomas Graf | b933f71 | 2006-09-18 00:10:19 -0700 | [diff] [blame] | 4245 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4246 | |
Thomas Graf | b933f71 | 2006-09-18 00:10:19 -0700 | [diff] [blame] | 4247 | 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 Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4252 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 4253 | if (!pfx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4254 | return -EINVAL; |
| 4255 | |
Heiner Kallweit | 6046d5b | 2014-04-20 21:29:36 +0200 | [diff] [blame] | 4256 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4263 | } |
| 4264 | |
Jiri Pirko | 479840f | 2013-12-06 09:45:21 +0100 | [diff] [blame] | 4265 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u32 ifa_flags, |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 4266 | u32 prefered_lft, u32 valid_lft) |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 4267 | { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 4268 | u32 flags; |
| 4269 | clock_t expires; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 4270 | unsigned long timeout; |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 4271 | bool was_managetempaddr; |
Thomas Haller | 5b84efe | 2014-01-15 15:36:59 +0100 | [diff] [blame] | 4272 | bool had_prefixroute; |
YOSHIFUJI Hideaki | 46d4804 | 2007-02-07 20:36:26 +0900 | [diff] [blame] | 4273 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 4274 | ASSERT_RTNL(); |
| 4275 | |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 4276 | if (!valid_lft || (prefered_lft > valid_lft)) |
| 4277 | return -EINVAL; |
| 4278 | |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 4279 | if (ifa_flags & IFA_F_MANAGETEMPADDR && |
| 4280 | (ifp->flags & IFA_F_TEMPORARY || ifp->prefix_len != 64)) |
| 4281 | return -EINVAL; |
| 4282 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 4283 | 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 Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 4287 | flags = RTF_EXPIRES; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 4288 | } else { |
| 4289 | expires = 0; |
| 4290 | flags = 0; |
| 4291 | ifa_flags |= IFA_F_PERMANENT; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 4292 | } |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 4293 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 4294 | 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 TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 4300 | |
| 4301 | spin_lock_bh(&ifp->lock); |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 4302 | was_managetempaddr = ifp->flags & IFA_F_MANAGETEMPADDR; |
Thomas Haller | 5b84efe | 2014-01-15 15:36:59 +0100 | [diff] [blame] | 4303 | had_prefixroute = ifp->flags & IFA_F_PERMANENT && |
| 4304 | !(ifp->flags & IFA_F_NOPREFIXROUTE); |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 4305 | ifp->flags &= ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | |
Thomas Haller | 761aac7 | 2014-01-15 15:36:58 +0100 | [diff] [blame] | 4306 | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR | |
| 4307 | IFA_F_NOPREFIXROUTE); |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 4308 | ifp->flags |= ifa_flags; |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 4309 | 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 TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 4316 | |
Thomas Haller | 761aac7 | 2014-01-15 15:36:58 +0100 | [diff] [blame] | 4317 | if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) { |
| 4318 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
| 4319 | expires, flags); |
Thomas Haller | 5b84efe | 2014-01-15 15:36:59 +0100 | [diff] [blame] | 4320 | } 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 Haller | 761aac7 | 2014-01-15 15:36:58 +0100 | [diff] [blame] | 4332 | } |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 4333 | |
| 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 Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 4341 | addrconf_verify_rtnl(); |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 4342 | |
| 4343 | return 0; |
| 4344 | } |
| 4345 | |
| 4346 | static int |
Thomas Graf | 661d296 | 2013-03-21 07:45:29 +0000 | [diff] [blame] | 4347 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4348 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 4349 | struct net *net = sock_net(skb->sk); |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 4350 | struct ifaddrmsg *ifm; |
| 4351 | struct nlattr *tb[IFA_MAX+1]; |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4352 | struct in6_addr *pfx, *peer_pfx; |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 4353 | struct inet6_ifaddr *ifa; |
| 4354 | struct net_device *dev; |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 4355 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
Jiri Pirko | 479840f | 2013-12-06 09:45:21 +0100 | [diff] [blame] | 4356 | u32 ifa_flags; |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 4357 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4358 | |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 4359 | 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 Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4364 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 4365 | if (!pfx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4366 | return -EINVAL; |
| 4367 | |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 4368 | if (tb[IFA_CACHEINFO]) { |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 4369 | struct ifa_cacheinfo *ci; |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 4370 | |
| 4371 | ci = nla_data(tb[IFA_CACHEINFO]); |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 4372 | valid_lft = ci->ifa_valid; |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 4373 | preferred_lft = ci->ifa_prefered; |
| 4374 | } else { |
| 4375 | preferred_lft = INFINITY_LIFE_TIME; |
| 4376 | valid_lft = INFINITY_LIFE_TIME; |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 4377 | } |
| 4378 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 4379 | dev = __dev_get_by_index(net, ifm->ifa_index); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 4380 | if (!dev) |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 4381 | return -ENODEV; |
| 4382 | |
Jiri Pirko | 479840f | 2013-12-06 09:45:21 +0100 | [diff] [blame] | 4383 | ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags; |
| 4384 | |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 4385 | /* We ignore other flags so far. */ |
Thomas Haller | 761aac7 | 2014-01-15 15:36:58 +0100 | [diff] [blame] | 4386 | ifa_flags &= IFA_F_NODAD | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR | |
Madhu Challa | 93a714d | 2015-02-25 09:58:35 -0800 | [diff] [blame] | 4387 | IFA_F_NOPREFIXROUTE | IFA_F_MCAUTOJOIN; |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 4388 | |
Daniel Lezcano | 1cab3da | 2008-01-10 22:44:09 -0800 | [diff] [blame] | 4389 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 4390 | if (!ifa) { |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 4391 | /* |
| 4392 | * It would be best to check for !NLM_F_CREATE here but |
stephen hemminger | db9c7c3 | 2014-01-12 11:26:32 -0800 | [diff] [blame] | 4393 | * userspace already relies on not having to provide this. |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 4394 | */ |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4395 | return inet6_addr_add(net, ifm->ifa_index, pfx, peer_pfx, |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 4396 | ifm->ifa_prefixlen, ifa_flags, |
| 4397 | preferred_lft, valid_lft); |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 4398 | } |
| 4399 | |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 4400 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
| 4401 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) |
| 4402 | err = -EEXIST; |
| 4403 | else |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 4404 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 4405 | |
| 4406 | in6_ifa_put(ifa); |
| 4407 | |
| 4408 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4409 | } |
| 4410 | |
Jiri Pirko | 479840f | 2013-12-06 09:45:21 +0100 | [diff] [blame] | 4411 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u32 flags, |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 4412 | 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 Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 4424 | static 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 Graf | 18a31e1 | 2010-11-17 04:12:02 +0000 | [diff] [blame] | 4429 | ci.cstamp = cstamp_delta(cstamp); |
| 4430 | ci.tstamp = cstamp_delta(tstamp); |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 4431 | ci.ifa_prefered = preferred; |
| 4432 | ci.ifa_valid = valid; |
| 4433 | |
| 4434 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); |
| 4435 | } |
| 4436 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 4437 | static 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 Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 4449 | static inline int inet6_ifaddr_msgsize(void) |
| 4450 | { |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 4451 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4452 | + nla_total_size(16) /* IFA_LOCAL */ |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 4453 | + nla_total_size(16) /* IFA_ADDRESS */ |
Jiri Pirko | 479840f | 2013-12-06 09:45:21 +0100 | [diff] [blame] | 4454 | + nla_total_size(sizeof(struct ifa_cacheinfo)) |
| 4455 | + nla_total_size(4) /* IFA_FLAGS */; |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 4456 | } |
YOSHIFUJI Hideaki | c5396a3 | 2006-06-17 22:48:48 -0700 | [diff] [blame] | 4457 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4458 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 4459 | u32 portid, u32 seq, int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4460 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4461 | struct nlmsghdr *nlh; |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 4462 | u32 preferred, valid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4463 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 4464 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 4465 | if (!nlh) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 4466 | return -EMSGSIZE; |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 4467 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 4468 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
| 4469 | ifa->idev->dev->ifindex); |
| 4470 | |
Yasushi Asano | fad8da3 | 2013-12-31 12:04:19 +0900 | [diff] [blame] | 4471 | if (!((ifa->flags&IFA_F_PERMANENT) && |
| 4472 | (ifa->prefered_lft == INFINITY_LIFE_TIME))) { |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 4473 | preferred = ifa->prefered_lft; |
| 4474 | valid = ifa->valid_lft; |
| 4475 | if (preferred != INFINITY_LIFE_TIME) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4476 | long tval = (jiffies - ifa->tstamp)/HZ; |
Jens Rosenboom | a1faa69 | 2009-06-25 04:55:50 +0000 | [diff] [blame] | 4477 | if (preferred > tval) |
| 4478 | preferred -= tval; |
| 4479 | else |
| 4480 | preferred = 0; |
Ben Hutchings | f56619f | 2010-06-26 11:37:47 +0000 | [diff] [blame] | 4481 | if (valid != INFINITY_LIFE_TIME) { |
| 4482 | if (valid > tval) |
| 4483 | valid -= tval; |
| 4484 | else |
| 4485 | valid = 0; |
| 4486 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4487 | } |
| 4488 | } else { |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 4489 | preferred = INFINITY_LIFE_TIME; |
| 4490 | valid = INFINITY_LIFE_TIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4491 | } |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 4492 | |
Cong Wang | 7996c79 | 2013-05-22 05:41:06 +0000 | [diff] [blame] | 4493 | if (!ipv6_addr_any(&ifa->peer_addr)) { |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 4494 | if (nla_put_in6_addr(skb, IFA_LOCAL, &ifa->addr) < 0 || |
| 4495 | nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->peer_addr) < 0) |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4496 | goto error; |
| 4497 | } else |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 4498 | if (nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->addr) < 0) |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4499 | goto error; |
| 4500 | |
| 4501 | if (put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) |
| 4502 | goto error; |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 4503 | |
Jiri Pirko | 479840f | 2013-12-06 09:45:21 +0100 | [diff] [blame] | 4504 | if (nla_put_u32(skb, IFA_FLAGS, ifa->flags) < 0) |
| 4505 | goto error; |
| 4506 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 4507 | nlmsg_end(skb, nlh); |
| 4508 | return 0; |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4509 | |
| 4510 | error: |
| 4511 | nlmsg_cancel(skb, nlh); |
| 4512 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4513 | } |
| 4514 | |
| 4515 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 4516 | u32 portid, u32 seq, int event, u16 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4517 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4518 | struct nlmsghdr *nlh; |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 4519 | u8 scope = RT_SCOPE_UNIVERSE; |
| 4520 | int ifindex = ifmca->idev->dev->ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4521 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 4522 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) |
| 4523 | scope = RT_SCOPE_SITE; |
| 4524 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 4525 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 4526 | if (!nlh) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 4527 | return -EMSGSIZE; |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 4528 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 4529 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 4530 | if (nla_put_in6_addr(skb, IFA_MULTICAST, &ifmca->mca_addr) < 0 || |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 4531 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 4532 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
| 4533 | nlmsg_cancel(skb, nlh); |
| 4534 | return -EMSGSIZE; |
| 4535 | } |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 4536 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 4537 | nlmsg_end(skb, nlh); |
| 4538 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4539 | } |
| 4540 | |
| 4541 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 4542 | u32 portid, u32 seq, int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4543 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4544 | struct nlmsghdr *nlh; |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 4545 | u8 scope = RT_SCOPE_UNIVERSE; |
| 4546 | int ifindex = ifaca->aca_idev->dev->ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4547 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 4548 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) |
| 4549 | scope = RT_SCOPE_SITE; |
| 4550 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 4551 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 4552 | if (!nlh) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 4553 | return -EMSGSIZE; |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 4554 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 4555 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 4556 | if (nla_put_in6_addr(skb, IFA_ANYCAST, &ifaca->aca_addr) < 0 || |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 4557 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 4558 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
| 4559 | nlmsg_cancel(skb, nlh); |
| 4560 | return -EMSGSIZE; |
| 4561 | } |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 4562 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 4563 | nlmsg_end(skb, nlh); |
| 4564 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4565 | } |
| 4566 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4567 | enum addr_type_t { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4568 | UNICAST_ADDR, |
| 4569 | MULTICAST_ADDR, |
| 4570 | ANYCAST_ADDR, |
| 4571 | }; |
| 4572 | |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4573 | /* called with rcu_read_lock() */ |
| 4574 | static 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4577 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4578 | struct ifmcaddr6 *ifmca; |
| 4579 | struct ifacaddr6 *ifaca; |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4580 | int err = 1; |
| 4581 | int ip_idx = *p_ip_idx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4582 | |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4583 | read_lock_bh(&idev->lock); |
| 4584 | switch (type) { |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 4585 | case UNICAST_ADDR: { |
| 4586 | struct inet6_ifaddr *ifa; |
| 4587 | |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4588 | /* unicast address incl. temp addr */ |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 4589 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
| 4590 | if (++ip_idx < s_ip_idx) |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4591 | continue; |
| 4592 | err = inet6_fill_ifaddr(skb, ifa, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 4593 | NETLINK_CB(cb->skb).portid, |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4594 | cb->nlh->nlmsg_seq, |
| 4595 | RTM_NEWADDR, |
| 4596 | NLM_F_MULTI); |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 4597 | if (err < 0) |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4598 | break; |
Nicolas Dichtel | 63998ac | 2013-03-22 06:28:43 +0000 | [diff] [blame] | 4599 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4600 | } |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4601 | break; |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 4602 | } |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4603 | 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. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 4610 | NETLINK_CB(cb->skb).portid, |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4611 | cb->nlh->nlmsg_seq, |
| 4612 | RTM_GETMULTICAST, |
| 4613 | NLM_F_MULTI); |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 4614 | if (err < 0) |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4615 | 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. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 4625 | NETLINK_CB(cb->skb).portid, |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4626 | cb->nlh->nlmsg_seq, |
| 4627 | RTM_GETANYCAST, |
| 4628 | NLM_F_MULTI); |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 4629 | if (err < 0) |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4630 | break; |
| 4631 | } |
| 4632 | break; |
| 4633 | default: |
| 4634 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4635 | } |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4636 | read_unlock_bh(&idev->lock); |
| 4637 | *p_ip_idx = ip_idx; |
| 4638 | return err; |
| 4639 | } |
| 4640 | |
| 4641 | static 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 Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4651 | |
| 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 Dichtel | 63998ac | 2013-03-22 06:28:43 +0000 | [diff] [blame] | 4657 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ net->dev_base_seq; |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4658 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
| 4659 | idx = 0; |
| 4660 | head = &net->dev_index_head[h]; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 4661 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4662 | if (idx < s_idx) |
| 4663 | goto cont; |
Patrick McHardy | 4b97efd | 2010-03-26 20:27:49 -0700 | [diff] [blame] | 4664 | if (h > s_h || idx > s_idx) |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4665 | s_ip_idx = 0; |
| 4666 | ip_idx = 0; |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4667 | idev = __in6_dev_get(dev); |
| 4668 | if (!idev) |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4669 | goto cont; |
| 4670 | |
| 4671 | if (in6_dump_addrs(idev, skb, cb, type, |
David S. Miller | 7b46a64 | 2015-01-18 23:36:08 -0500 | [diff] [blame] | 4672 | s_ip_idx, &ip_idx) < 0) |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4673 | goto done; |
| 4674 | cont: |
| 4675 | idx++; |
| 4676 | } |
| 4677 | } |
| 4678 | done: |
| 4679 | rcu_read_unlock(); |
| 4680 | cb->args[0] = h; |
| 4681 | cb->args[1] = idx; |
| 4682 | cb->args[2] = ip_idx; |
| 4683 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4684 | return skb->len; |
| 4685 | } |
| 4686 | |
| 4687 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) |
| 4688 | { |
| 4689 | enum addr_type_t type = UNICAST_ADDR; |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 4690 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4691 | return inet6_dump_addr(skb, cb, type); |
| 4692 | } |
| 4693 | |
| 4694 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) |
| 4695 | { |
| 4696 | enum addr_type_t type = MULTICAST_ADDR; |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 4697 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4698 | return inet6_dump_addr(skb, cb, type); |
| 4699 | } |
| 4700 | |
| 4701 | |
| 4702 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) |
| 4703 | { |
| 4704 | enum addr_type_t type = ANYCAST_ADDR; |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 4705 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4706 | return inet6_dump_addr(skb, cb, type); |
| 4707 | } |
| 4708 | |
Thomas Graf | 661d296 | 2013-03-21 07:45:29 +0000 | [diff] [blame] | 4709 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh) |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4710 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 4711 | struct net *net = sock_net(in_skb->sk); |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 4712 | struct ifaddrmsg *ifm; |
| 4713 | struct nlattr *tb[IFA_MAX+1]; |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4714 | struct in6_addr *addr = NULL, *peer; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4715 | struct net_device *dev = NULL; |
| 4716 | struct inet6_ifaddr *ifa; |
| 4717 | struct sk_buff *skb; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4718 | int err; |
| 4719 | |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 4720 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
| 4721 | if (err < 0) |
| 4722 | goto errout; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4723 | |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4724 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 4725 | if (!addr) { |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 4726 | err = -EINVAL; |
| 4727 | goto errout; |
| 4728 | } |
| 4729 | |
| 4730 | ifm = nlmsg_data(nlh); |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4731 | if (ifm->ifa_index) |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 4732 | dev = __dev_get_by_index(net, ifm->ifa_index); |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4733 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4734 | ifa = ipv6_get_ifaddr(net, addr, dev, 1); |
| 4735 | if (!ifa) { |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 4736 | err = -EADDRNOTAVAIL; |
| 4737 | goto errout; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4738 | } |
| 4739 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4740 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL); |
| 4741 | if (!skb) { |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 4742 | err = -ENOBUFS; |
| 4743 | goto errout_ifa; |
| 4744 | } |
| 4745 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 4746 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).portid, |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4747 | nlh->nlmsg_seq, RTM_NEWADDR, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 4748 | 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. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 4754 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 4755 | errout_ifa: |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4756 | in6_ifa_put(ifa); |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 4757 | errout: |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4758 | return err; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4759 | } |
| 4760 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4761 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
| 4762 | { |
| 4763 | struct sk_buff *skb; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 4764 | struct net *net = dev_net(ifa->idev->dev); |
Thomas Graf | 5d62026 | 2006-08-15 00:35:02 -0700 | [diff] [blame] | 4765 | int err = -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4766 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 4767 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 4768 | if (!skb) |
Thomas Graf | 5d62026 | 2006-08-15 00:35:02 -0700 | [diff] [blame] | 4769 | goto errout; |
| 4770 | |
| 4771 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 4772 | 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 Ayuso | 1ce85fe | 2009-02-24 23:18:28 -0800 | [diff] [blame] | 4778 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
| 4779 | return; |
Thomas Graf | 5d62026 | 2006-08-15 00:35:02 -0700 | [diff] [blame] | 4780 | errout: |
| 4781 | if (err < 0) |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 4782 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4783 | } |
| 4784 | |
Dave Jones | b6f99a2 | 2007-03-22 12:27:49 -0700 | [diff] [blame] | 4785 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4786 | __s32 *array, int bytes) |
| 4787 | { |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 4788 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
| 4789 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4790 | 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 Graf | 93908d1 | 2010-11-17 01:44:24 +0000 | [diff] [blame] | 4799 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4803 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; |
Hannes Frederic Sowa | fc4eba5 | 2013-08-14 01:03:46 +0200 | [diff] [blame] | 4804 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4808 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4813 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 4814 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
Hangbin Liu | 8013d1d | 2015-07-30 14:28:42 +0800 | [diff] [blame] | 4815 | array[DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT] = cnf->accept_ra_min_hop_limit; |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 4816 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 4817 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 4818 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; |
Thomas Graf | 93908d1 | 2010-11-17 01:44:24 +0000 | [diff] [blame] | 4819 | array[DEVCONF_RTR_PROBE_INTERVAL] = |
| 4820 | jiffies_to_msecs(cnf->rtr_probe_interval); |
Neil Horman | fa03ef3 | 2007-01-30 14:30:10 -0800 | [diff] [blame] | 4821 | #ifdef CONFIG_IPV6_ROUTE_INFO |
YOSHIFUJI Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 4822 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
| 4823 | #endif |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 4824 | #endif |
YOSHIFUJI Hideaki | fbea49e | 2006-09-22 14:43:49 -0700 | [diff] [blame] | 4825 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 4826 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 4827 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 4828 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; |
Erik Kline | 7fd2561 | 2014-10-28 18:11:14 +0900 | [diff] [blame] | 4829 | array[DEVCONF_USE_OPTIMISTIC] = cnf->use_optimistic; |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 4830 | #endif |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 4831 | #ifdef CONFIG_IPV6_MROUTE |
| 4832 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; |
| 4833 | #endif |
YOSHIFUJI Hideaki | 778d80b | 2008-06-28 14:17:11 +0900 | [diff] [blame] | 4834 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 4835 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
Cosmin Ratiu | c3faca0 | 2009-10-09 03:11:14 +0000 | [diff] [blame] | 4836 | array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao; |
Hannes Frederic Sowa | 5cb0443 | 2012-11-06 16:46:20 +0000 | [diff] [blame] | 4837 | array[DEVCONF_NDISC_NOTIFY] = cnf->ndisc_notify; |
Hannes Frederic Sowa | b800c3b | 2013-08-27 01:36:51 +0200 | [diff] [blame] | 4838 | array[DEVCONF_SUPPRESS_FRAG_NDISC] = cnf->suppress_frag_ndisc; |
Ben Greear | d933319 | 2014-06-25 14:44:53 -0700 | [diff] [blame] | 4839 | array[DEVCONF_ACCEPT_RA_FROM_LOCAL] = cnf->accept_ra_from_local; |
Harout Hedeshian | c2943f1 | 2015-01-20 10:06:05 -0700 | [diff] [blame] | 4840 | array[DEVCONF_ACCEPT_RA_MTU] = cnf->accept_ra_mtu; |
Andy Gospodarek | 35103d1 | 2015-08-13 10:39:01 -0400 | [diff] [blame] | 4841 | array[DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN] = cnf->ignore_routes_with_linkdown; |
Hannes Frederic Sowa | 3d1bec9 | 2015-03-23 23:36:00 +0100 | [diff] [blame] | 4842 | /* we omit DEVCONF_STABLE_SECRET for now */ |
Erik Kline | 3985e8a | 2015-07-22 16:38:25 +0900 | [diff] [blame] | 4843 | array[DEVCONF_USE_OIF_ADDRS_ONLY] = cnf->use_oif_addrs_only; |
Johannes Berg | abbc304 | 2016-02-04 13:31:19 +0100 | [diff] [blame] | 4844 | array[DEVCONF_DROP_UNICAST_IN_L2_MULTICAST] = cnf->drop_unicast_in_l2_multicast; |
Johannes Berg | 7a02bf8 | 2016-02-04 13:31:20 +0100 | [diff] [blame] | 4845 | array[DEVCONF_DROP_UNSOLICITED_NA] = cnf->drop_unsolicited_na; |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 4846 | array[DEVCONF_KEEP_ADDR_ON_DOWN] = cnf->keep_addr_on_down; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4847 | } |
| 4848 | |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 4849 | static 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 Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 4855 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ |
| 4856 | + nla_total_size(sizeof(struct in6_addr)); /* IFLA_INET6_TOKEN */ |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 4857 | } |
| 4858 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 4859 | static 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 Gospodarek | 0344338 | 2015-08-13 15:26:35 -0400 | [diff] [blame] | 4866 | + nla_total_size(1) /* IFLA_OPERSTATE */ |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 4867 | + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */ |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 4868 | } |
YOSHIFUJI Hideaki | c5396a3 | 2006-06-17 22:48:48 -0700 | [diff] [blame] | 4869 | |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 4870 | static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib, |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 4871 | int items, int bytes) |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 4872 | { |
| 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 Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 4880 | put_unaligned(atomic_long_read(&mib[i]), &stats[i]); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 4881 | |
| 4882 | memset(&stats[items], 0, pad); |
| 4883 | } |
| 4884 | |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 4885 | static inline void __snmp6_fill_stats64(u64 *stats, void __percpu *mib, |
Raghavendra K T | a3a7737 | 2015-08-30 11:29:42 +0530 | [diff] [blame] | 4886 | int bytes, size_t syncpoff) |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 4887 | { |
Raghavendra K T | a3a7737 | 2015-08-30 11:29:42 +0530 | [diff] [blame] | 4888 | int i, c; |
| 4889 | u64 buff[IPSTATS_MIB_MAX]; |
| 4890 | int pad = bytes - sizeof(u64) * IPSTATS_MIB_MAX; |
| 4891 | |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 4892 | BUG_ON(pad < 0); |
| 4893 | |
Raghavendra K T | a3a7737 | 2015-08-30 11:29:42 +0530 | [diff] [blame] | 4894 | memset(buff, 0, sizeof(buff)); |
| 4895 | buff[0] = IPSTATS_MIB_MAX; |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 4896 | |
Raghavendra K T | a3a7737 | 2015-08-30 11:29:42 +0530 | [diff] [blame] | 4897 | 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 Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 4904 | } |
| 4905 | |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 4906 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, |
| 4907 | int bytes) |
| 4908 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4909 | switch (attrtype) { |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 4910 | case IFLA_INET6_STATS: |
Raghavendra K T | a3a7737 | 2015-08-30 11:29:42 +0530 | [diff] [blame] | 4911 | __snmp6_fill_stats64(stats, idev->stats.ipv6, bytes, |
| 4912 | offsetof(struct ipstats_mib, syncp)); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 4913 | break; |
| 4914 | case IFLA_INET6_ICMP6STATS: |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 4915 | __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, ICMP6_MIB_MAX, bytes); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 4916 | break; |
| 4917 | } |
| 4918 | } |
| 4919 | |
Sowmini Varadhan | d5566fd | 2015-09-11 16:48:48 -0400 | [diff] [blame] | 4920 | static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev, |
| 4921 | u32 ext_filter_mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4922 | { |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 4923 | struct nlattr *nla; |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 4924 | struct ifla_cacheinfo ci; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4925 | |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 4926 | if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags)) |
| 4927 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4928 | ci.max_reasm_len = IPV6_MAXPLEN; |
David S. Miller | 2491242 | 2010-11-19 13:13:47 -0800 | [diff] [blame] | 4929 | ci.tstamp = cstamp_delta(idev->tstamp); |
| 4930 | ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time); |
Jiri Pirko | 1f9248e5 | 2013-12-07 19:26:53 +0100 | [diff] [blame] | 4931 | ci.retrans_time = jiffies_to_msecs(NEIGH_VAR(idev->nd_parms, RETRANS_TIME)); |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 4932 | if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci)) |
| 4933 | goto nla_put_failure; |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 4934 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 4935 | if (!nla) |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 4936 | goto nla_put_failure; |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 4937 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4938 | |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 4939 | /* XXX - MC not implemented */ |
| 4940 | |
Sowmini Varadhan | d5566fd | 2015-09-11 16:48:48 -0400 | [diff] [blame] | 4941 | if (ext_filter_mask & RTEXT_FILTER_SKIP_STATS) |
| 4942 | return 0; |
| 4943 | |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 4944 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 4945 | if (!nla) |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 4946 | 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 Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 4950 | if (!nla) |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 4951 | goto nla_put_failure; |
| 4952 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4953 | |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 4954 | nla = nla_reserve(skb, IFLA_INET6_TOKEN, sizeof(struct in6_addr)); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 4955 | if (!nla) |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 4956 | goto nla_put_failure; |
Jiri Pirko | bc91b0f | 2014-07-11 21:10:18 +0200 | [diff] [blame] | 4957 | |
| 4958 | if (nla_put_u8(skb, IFLA_INET6_ADDR_GEN_MODE, idev->addr_gen_mode)) |
| 4959 | goto nla_put_failure; |
| 4960 | |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 4961 | 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 Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 4965 | return 0; |
| 4966 | |
| 4967 | nla_put_failure: |
| 4968 | return -EMSGSIZE; |
| 4969 | } |
| 4970 | |
Arad, Ronen | b1974ed | 2015-10-19 09:23:28 -0700 | [diff] [blame] | 4971 | static size_t inet6_get_link_af_size(const struct net_device *dev, |
| 4972 | u32 ext_filter_mask) |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 4973 | { |
| 4974 | if (!__in6_dev_get(dev)) |
| 4975 | return 0; |
| 4976 | |
| 4977 | return inet6_ifla6_size(); |
| 4978 | } |
| 4979 | |
Sowmini Varadhan | d5566fd | 2015-09-11 16:48:48 -0400 | [diff] [blame] | 4980 | static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev, |
| 4981 | u32 ext_filter_mask) |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 4982 | { |
| 4983 | struct inet6_dev *idev = __in6_dev_get(dev); |
| 4984 | |
| 4985 | if (!idev) |
| 4986 | return -ENODATA; |
| 4987 | |
Sowmini Varadhan | d5566fd | 2015-09-11 16:48:48 -0400 | [diff] [blame] | 4988 | if (inet6_fill_ifla6_attrs(skb, idev, ext_filter_mask) < 0) |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 4989 | return -EMSGSIZE; |
| 4990 | |
| 4991 | return 0; |
| 4992 | } |
| 4993 | |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 4994 | static int inet6_set_iftoken(struct inet6_dev *idev, struct in6_addr *token) |
| 4995 | { |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 4996 | struct inet6_ifaddr *ifp; |
| 4997 | struct net_device *dev = idev->dev; |
Daniel Borkmann | fc40383 | 2013-04-09 03:47:15 +0000 | [diff] [blame] | 4998 | bool update_rs = false; |
Hannes Frederic Sowa | dc84829 | 2013-06-24 21:42:40 +0200 | [diff] [blame] | 4999 | struct in6_addr ll_addr; |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5000 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 5001 | ASSERT_RTNL(); |
| 5002 | |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 5003 | if (!token) |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5004 | return -EINVAL; |
| 5005 | if (ipv6_addr_any(token)) |
| 5006 | return -EINVAL; |
| 5007 | if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) |
| 5008 | return -EINVAL; |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5009 | 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 Sowa | dc84829 | 2013-06-24 21:42:40 +0200 | [diff] [blame] | 5021 | if (!idev->dead && (idev->if_flags & IF_READY) && |
| 5022 | !ipv6_get_lladdr(dev, &ll_addr, IFA_F_TENTATIVE | |
| 5023 | IFA_F_OPTIMISTIC)) { |
Daniel Borkmann | fc40383 | 2013-04-09 03:47:15 +0000 | [diff] [blame] | 5024 | |
| 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 Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5031 | |
| 5032 | write_lock_bh(&idev->lock); |
Daniel Borkmann | fc40383 | 2013-04-09 03:47:15 +0000 | [diff] [blame] | 5033 | |
Hannes Frederic Sowa | 77ecaac | 2013-06-26 03:41:49 +0200 | [diff] [blame] | 5034 | if (update_rs) { |
Daniel Borkmann | fc40383 | 2013-04-09 03:47:15 +0000 | [diff] [blame] | 5035 | idev->if_flags |= IF_RS_SENT; |
Hannes Frederic Sowa | 77ecaac | 2013-06-26 03:41:49 +0200 | [diff] [blame] | 5036 | idev->rs_probes = 1; |
| 5037 | addrconf_mod_rs_timer(idev, idev->cnf.rtr_solicit_interval); |
| 5038 | } |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5039 | |
| 5040 | /* Well, that's kinda nasty ... */ |
| 5041 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
| 5042 | spin_lock(&ifp->lock); |
Daniel Borkmann | 617fe29 | 2013-04-09 03:47:16 +0000 | [diff] [blame] | 5043 | if (ifp->tokenized) { |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5044 | ifp->valid_lft = 0; |
| 5045 | ifp->prefered_lft = 0; |
| 5046 | } |
| 5047 | spin_unlock(&ifp->lock); |
| 5048 | } |
| 5049 | |
| 5050 | write_unlock_bh(&idev->lock); |
Lubomir Rintel | b2ed64a | 2014-10-27 17:39:16 +0100 | [diff] [blame] | 5051 | inet6_ifinfo_notify(RTM_NEWLINK, idev); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 5052 | addrconf_verify_rtnl(); |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5053 | return 0; |
| 5054 | } |
| 5055 | |
Daniel Borkmann | 11b1f82 | 2015-02-05 14:39:11 +0100 | [diff] [blame] | 5056 | static 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 | |
| 5061 | static 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 Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5072 | static 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 Pirko | bc91b0f | 2014-07-11 21:10:18 +0200 | [diff] [blame] | 5084 | if (tb[IFLA_INET6_TOKEN]) { |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5085 | err = inet6_set_iftoken(idev, nla_data(tb[IFLA_INET6_TOKEN])); |
Jiri Pirko | bc91b0f | 2014-07-11 21:10:18 +0200 | [diff] [blame] | 5086 | 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 Sowa | 622c81d | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 5094 | mode != IN6_ADDR_GEN_MODE_NONE && |
Bjørn Mork | cc9da6c | 2015-12-16 16:44:38 +0100 | [diff] [blame] | 5095 | mode != IN6_ADDR_GEN_MODE_STABLE_PRIVACY && |
| 5096 | mode != IN6_ADDR_GEN_MODE_RANDOM) |
Jiri Pirko | bc91b0f | 2014-07-11 21:10:18 +0200 | [diff] [blame] | 5097 | return -EINVAL; |
Hannes Frederic Sowa | 622c81d | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 5098 | |
| 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 Pirko | bc91b0f | 2014-07-11 21:10:18 +0200 | [diff] [blame] | 5104 | idev->addr_gen_mode = mode; |
| 5105 | err = 0; |
| 5106 | } |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5107 | |
| 5108 | return err; |
| 5109 | } |
| 5110 | |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 5111 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 5112 | u32 portid, u32 seq, int event, unsigned int flags) |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 5113 | { |
| 5114 | struct net_device *dev = idev->dev; |
| 5115 | struct ifinfomsg *hdr; |
| 5116 | struct nlmsghdr *nlh; |
| 5117 | void *protoinfo; |
| 5118 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 5119 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*hdr), flags); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 5120 | if (!nlh) |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 5121 | 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. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 5131 | 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 Dichtel | a54acb3 | 2015-04-02 17:07:00 +0200 | [diff] [blame] | 5135 | (dev->ifindex != dev_get_iflink(dev) && |
Andy Gospodarek | 0344338 | 2015-08-13 15:26:35 -0400 | [diff] [blame] | 5136 | 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. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 5139 | goto nla_put_failure; |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 5140 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 5141 | if (!protoinfo) |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 5142 | goto nla_put_failure; |
| 5143 | |
Sowmini Varadhan | d5566fd | 2015-09-11 16:48:48 -0400 | [diff] [blame] | 5144 | if (inet6_fill_ifla6_attrs(skb, idev, 0) < 0) |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 5145 | goto nla_put_failure; |
| 5146 | |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 5147 | nla_nest_end(skb, protoinfo); |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 5148 | nlmsg_end(skb, nlh); |
| 5149 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5150 | |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 5151 | nla_put_failure: |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 5152 | nlmsg_cancel(skb, nlh); |
| 5153 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5154 | } |
| 5155 | |
| 5156 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) |
| 5157 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 5158 | struct net *net = sock_net(skb->sk); |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 5159 | int h, s_h; |
David S. Miller | 434a8a58 | 2009-11-11 18:53:00 -0800 | [diff] [blame] | 5160 | int idx = 0, s_idx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5161 | struct net_device *dev; |
| 5162 | struct inet6_dev *idev; |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 5163 | struct hlist_head *head; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5164 | |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 5165 | 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 Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 5172 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 5173 | 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. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 5179 | NETLINK_CB(cb->skb).portid, |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 5180 | cb->nlh->nlmsg_seq, |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 5181 | RTM_NEWLINK, NLM_F_MULTI) < 0) |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 5182 | goto out; |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 5183 | cont: |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 5184 | idx++; |
| 5185 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5186 | } |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 5187 | out: |
| 5188 | rcu_read_unlock(); |
| 5189 | cb->args[1] = idx; |
| 5190 | cb->args[0] = h; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5191 | |
| 5192 | return skb->len; |
| 5193 | } |
| 5194 | |
| 5195 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) |
| 5196 | { |
| 5197 | struct sk_buff *skb; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 5198 | struct net *net = dev_net(idev->dev); |
Thomas Graf | 8d7a76c | 2006-08-15 00:35:47 -0700 | [diff] [blame] | 5199 | int err = -ENOBUFS; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 5200 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 5201 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 5202 | if (!skb) |
Thomas Graf | 8d7a76c | 2006-08-15 00:35:47 -0700 | [diff] [blame] | 5203 | goto errout; |
| 5204 | |
| 5205 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 5206 | 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 Dichtel | 5f75a10 | 2010-12-07 23:38:31 +0000 | [diff] [blame] | 5212 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC); |
Pablo Neira Ayuso | 1ce85fe | 2009-02-24 23:18:28 -0800 | [diff] [blame] | 5213 | return; |
Thomas Graf | 8d7a76c | 2006-08-15 00:35:47 -0700 | [diff] [blame] | 5214 | errout: |
| 5215 | if (err < 0) |
Nicolas Dichtel | 5f75a10 | 2010-12-07 23:38:31 +0000 | [diff] [blame] | 5216 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5217 | } |
| 5218 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 5219 | static 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 Hideaki | c5396a3 | 2006-06-17 22:48:48 -0700 | [diff] [blame] | 5225 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5226 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 5227 | struct prefix_info *pinfo, u32 portid, u32 seq, |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 5228 | int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5229 | { |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 5230 | struct prefixmsg *pmsg; |
| 5231 | struct nlmsghdr *nlh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5232 | struct prefix_cacheinfo ci; |
| 5233 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 5234 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*pmsg), flags); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 5235 | if (!nlh) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 5236 | return -EMSGSIZE; |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 5237 | |
| 5238 | pmsg = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5239 | pmsg->prefix_family = AF_INET6; |
Patrick McHardy | 8a47077 | 2005-06-28 12:56:45 -0700 | [diff] [blame] | 5240 | pmsg->prefix_pad1 = 0; |
| 5241 | pmsg->prefix_pad2 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5242 | pmsg->prefix_ifindex = idev->dev->ifindex; |
| 5243 | pmsg->prefix_len = pinfo->prefix_len; |
| 5244 | pmsg->prefix_type = pinfo->type; |
Patrick McHardy | 8a47077 | 2005-06-28 12:56:45 -0700 | [diff] [blame] | 5245 | pmsg->prefix_pad3 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5246 | 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. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 5252 | if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix)) |
| 5253 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5254 | ci.preferred_time = ntohl(pinfo->prefered); |
| 5255 | ci.valid_time = ntohl(pinfo->valid); |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 5256 | if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci)) |
| 5257 | goto nla_put_failure; |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 5258 | nlmsg_end(skb, nlh); |
| 5259 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5260 | |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 5261 | nla_put_failure: |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 5262 | nlmsg_cancel(skb, nlh); |
| 5263 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5264 | } |
| 5265 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 5266 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5267 | struct prefix_info *pinfo) |
| 5268 | { |
| 5269 | struct sk_buff *skb; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 5270 | struct net *net = dev_net(idev->dev); |
Thomas Graf | 8c384bfa | 2006-08-15 00:36:07 -0700 | [diff] [blame] | 5271 | int err = -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5272 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 5273 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 5274 | if (!skb) |
Thomas Graf | 8c384bfa | 2006-08-15 00:36:07 -0700 | [diff] [blame] | 5275 | goto errout; |
| 5276 | |
| 5277 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 5278 | 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 Ayuso | 1ce85fe | 2009-02-24 23:18:28 -0800 | [diff] [blame] | 5284 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
| 5285 | return; |
Thomas Graf | 8c384bfa | 2006-08-15 00:36:07 -0700 | [diff] [blame] | 5286 | errout: |
| 5287 | if (err < 0) |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 5288 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5289 | } |
| 5290 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5291 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
| 5292 | { |
Nicolas Dichtel | 63998ac | 2013-03-22 06:28:43 +0000 | [diff] [blame] | 5293 | struct net *net = dev_net(ifp->idev->dev); |
| 5294 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 5295 | if (event) |
| 5296 | ASSERT_RTNL(); |
| 5297 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5298 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); |
| 5299 | |
| 5300 | switch (event) { |
| 5301 | case RTM_NEWADDR: |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 5302 | /* |
| 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5310 | if (ifp->idev->cnf.forwarding) |
| 5311 | addrconf_join_anycast(ifp); |
Cong Wang | 7996c79 | 2013-05-22 05:41:06 +0000 | [diff] [blame] | 5312 | if (!ipv6_addr_any(&ifp->peer_addr)) |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 5313 | addrconf_prefix_route(&ifp->peer_addr, 128, |
| 5314 | ifp->idev->dev, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5315 | 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 Wang | 7996c79 | 2013-05-22 05:41:06 +0000 | [diff] [blame] | 5320 | if (!ipv6_addr_any(&ifp->peer_addr)) { |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 5321 | struct rt6_info *rt; |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 5322 | |
Nicolas Dichtel | e7478df | 2014-09-03 23:59:22 +0200 | [diff] [blame] | 5323 | rt = addrconf_get_prefix_route(&ifp->peer_addr, 128, |
| 5324 | ifp->idev->dev, 0, 0); |
Martin KaFai Lau | 8e3d5be | 2015-09-15 14:30:08 -0700 | [diff] [blame] | 5325 | if (rt) |
| 5326 | ip6_del_rt(rt); |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 5327 | } |
David Ahern | 799977d | 2016-03-02 11:30:07 -0800 | [diff] [blame] | 5328 | dst_hold(&ifp->rt->dst); |
stephen hemminger | 93fa159 | 2010-04-12 05:41:31 +0000 | [diff] [blame] | 5329 | |
David Ahern | 799977d | 2016-03-02 11:30:07 -0800 | [diff] [blame] | 5330 | ip6_del_rt(ifp->rt); |
| 5331 | |
Hannes Frederic Sowa | 705f1c8 | 2014-09-28 00:46:06 +0200 | [diff] [blame] | 5332 | rt_genid_bump_ipv6(net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5333 | break; |
| 5334 | } |
Nicolas Dichtel | 63998ac | 2013-03-22 06:28:43 +0000 | [diff] [blame] | 5335 | atomic_inc(&net->ipv6.dev_addr_genid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5336 | } |
| 5337 | |
| 5338 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
| 5339 | { |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 5340 | rcu_read_lock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5341 | if (likely(ifp->idev->dead == 0)) |
| 5342 | __ipv6_ifa_notify(event, ifp); |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 5343 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5344 | } |
| 5345 | |
| 5346 | #ifdef CONFIG_SYSCTL |
| 5347 | |
| 5348 | static |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 5349 | int addrconf_sysctl_forward(struct ctl_table *ctl, int write, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5350 | void __user *buffer, size_t *lenp, loff_t *ppos) |
| 5351 | { |
| 5352 | int *valp = ctl->data; |
| 5353 | int val = *valp; |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 5354 | loff_t pos = *ppos; |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 5355 | struct ctl_table lctl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5356 | int ret; |
| 5357 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 5358 | /* |
| 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5366 | |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 5367 | if (write) |
Stephen Hemminger | b325fdd | 2009-02-26 06:55:31 +0000 | [diff] [blame] | 5368 | ret = addrconf_fixup_forwarding(ctl, valp, val); |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 5369 | if (ret) |
| 5370 | *ppos = pos; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 5371 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5372 | } |
| 5373 | |
Marcelo Leitner | 7775142 | 2015-02-23 11:17:13 -0300 | [diff] [blame] | 5374 | static |
Phil Sutter | d6df198 | 2015-12-01 22:45:15 +0100 | [diff] [blame] | 5375 | int 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 | |
| 5388 | static |
Marcelo Leitner | 7775142 | 2015-02-23 11:17:13 -0300 | [diff] [blame] | 5389 | int 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 Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5403 | static void dev_disable_change(struct inet6_dev *idev) |
| 5404 | { |
Cong Wang | 75538c2 | 2013-05-29 11:30:50 +0800 | [diff] [blame] | 5405 | struct netdev_notifier_info info; |
| 5406 | |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5407 | if (!idev || !idev->dev) |
| 5408 | return; |
| 5409 | |
Cong Wang | 75538c2 | 2013-05-29 11:30:50 +0800 | [diff] [blame] | 5410 | netdev_notifier_info_init(&info, idev->dev); |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5411 | if (idev->cnf.disable_ipv6) |
Cong Wang | 75538c2 | 2013-05-29 11:30:50 +0800 | [diff] [blame] | 5412 | addrconf_notify(NULL, NETDEV_DOWN, &info); |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5413 | else |
Cong Wang | 75538c2 | 2013-05-29 11:30:50 +0800 | [diff] [blame] | 5414 | addrconf_notify(NULL, NETDEV_UP, &info); |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5415 | } |
| 5416 | |
| 5417 | static void addrconf_disable_change(struct net *net, __s32 newf) |
| 5418 | { |
| 5419 | struct net_device *dev; |
| 5420 | struct inet6_dev *idev; |
| 5421 | |
Eric Dumazet | c6d14c8 | 2009-11-04 05:43:23 -0800 | [diff] [blame] | 5422 | rcu_read_lock(); |
| 5423 | for_each_netdev_rcu(net, dev) { |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5424 | 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 Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5431 | } |
Eric Dumazet | c6d14c8 | 2009-11-04 05:43:23 -0800 | [diff] [blame] | 5432 | rcu_read_unlock(); |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5433 | } |
| 5434 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 5435 | static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf) |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5436 | { |
| 5437 | struct net *net; |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 5438 | int old; |
| 5439 | |
| 5440 | if (!rtnl_trylock()) |
| 5441 | return restart_syscall(); |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5442 | |
| 5443 | net = (struct net *)table->extra2; |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 5444 | old = *p; |
| 5445 | *p = newf; |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5446 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 5447 | if (p == &net->ipv6.devconf_dflt->disable_ipv6) { |
| 5448 | rtnl_unlock(); |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5449 | return 0; |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 5450 | } |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5451 | |
| 5452 | if (p == &net->ipv6.devconf_all->disable_ipv6) { |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5453 | net->ipv6.devconf_dflt->disable_ipv6 = newf; |
| 5454 | addrconf_disable_change(net, newf); |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 5455 | } else if ((!newf) ^ (!old)) |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5456 | dev_disable_change((struct inet6_dev *)table->extra1); |
| 5457 | |
| 5458 | rtnl_unlock(); |
| 5459 | return 0; |
| 5460 | } |
| 5461 | |
| 5462 | static |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 5463 | int addrconf_sysctl_disable(struct ctl_table *ctl, int write, |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5464 | void __user *buffer, size_t *lenp, loff_t *ppos) |
| 5465 | { |
| 5466 | int *valp = ctl->data; |
| 5467 | int val = *valp; |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 5468 | loff_t pos = *ppos; |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 5469 | struct ctl_table lctl; |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5470 | int ret; |
| 5471 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 5472 | /* |
| 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 Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5480 | |
| 5481 | if (write) |
| 5482 | ret = addrconf_disable_ipv6(ctl, valp, val); |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 5483 | if (ret) |
| 5484 | *ppos = pos; |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5485 | return ret; |
| 5486 | } |
| 5487 | |
stephen hemminger | c92d549 | 2013-12-17 22:37:14 -0800 | [diff] [blame] | 5488 | static |
| 5489 | int 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 Sowa | 3d1bec9 | 2015-03-23 23:36:00 +0100 | [diff] [blame] | 5527 | static 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 Sowa | 622c81d | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 5535 | struct net *net = ctl->extra2; |
Hannes Frederic Sowa | 3d1bec9 | 2015-03-23 23:36:00 +0100 | [diff] [blame] | 5536 | struct ipv6_stable_secret *secret = ctl->data; |
| 5537 | |
Hannes Frederic Sowa | 622c81d | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 5538 | if (&net->ipv6.devconf_all->stable_secret == ctl->data) |
| 5539 | return -EIO; |
| 5540 | |
Hannes Frederic Sowa | 3d1bec9 | 2015-03-23 23:36:00 +0100 | [diff] [blame] | 5541 | 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 Cong | 5449a5c | 2015-12-21 10:55:45 -0800 | [diff] [blame] | 5552 | err = snprintf(str, sizeof(str), "%pI6", &secret->secret); |
| 5553 | if (err >= sizeof(str)) { |
| 5554 | err = -EIO; |
| 5555 | goto out; |
Hannes Frederic Sowa | 3d1bec9 | 2015-03-23 23:36:00 +0100 | [diff] [blame] | 5556 | } |
| 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 Sowa | 622c81d | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 5570 | 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 Sowa | 3d1bec9 | 2015-03-23 23:36:00 +0100 | [diff] [blame] | 5587 | out: |
| 5588 | rtnl_unlock(); |
| 5589 | |
| 5590 | return err; |
| 5591 | } |
stephen hemminger | c92d549 | 2013-12-17 22:37:14 -0800 | [diff] [blame] | 5592 | |
Andy Gospodarek | 35103d1 | 2015-08-13 10:39:01 -0400 | [diff] [blame] | 5593 | static |
| 5594 | int 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5621 | static struct addrconf_sysctl_table |
| 5622 | { |
| 5623 | struct ctl_table_header *sysctl_header; |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 5624 | struct ctl_table addrconf_vars[DEVCONF_MAX+1]; |
Brian Haley | ab32ea5 | 2006-09-22 14:15:41 -0700 | [diff] [blame] | 5625 | } addrconf_sysctl __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5626 | .sysctl_header = NULL, |
| 5627 | .addrconf_vars = { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 5628 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5629 | .procname = "forwarding", |
| 5630 | .data = &ipv6_devconf.forwarding, |
| 5631 | .maxlen = sizeof(int), |
| 5632 | .mode = 0644, |
| 5633 | .proc_handler = addrconf_sysctl_forward, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5634 | }, |
| 5635 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5636 | .procname = "hop_limit", |
| 5637 | .data = &ipv6_devconf.hop_limit, |
| 5638 | .maxlen = sizeof(int), |
| 5639 | .mode = 0644, |
Phil Sutter | d6df198 | 2015-12-01 22:45:15 +0100 | [diff] [blame] | 5640 | .proc_handler = addrconf_sysctl_hop_limit, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5641 | }, |
| 5642 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5643 | .procname = "mtu", |
| 5644 | .data = &ipv6_devconf.mtu6, |
| 5645 | .maxlen = sizeof(int), |
| 5646 | .mode = 0644, |
Marcelo Leitner | 7775142 | 2015-02-23 11:17:13 -0300 | [diff] [blame] | 5647 | .proc_handler = addrconf_sysctl_mtu, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5648 | }, |
| 5649 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5650 | .procname = "accept_ra", |
| 5651 | .data = &ipv6_devconf.accept_ra, |
| 5652 | .maxlen = sizeof(int), |
| 5653 | .mode = 0644, |
| 5654 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5655 | }, |
| 5656 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5657 | .procname = "accept_redirects", |
| 5658 | .data = &ipv6_devconf.accept_redirects, |
| 5659 | .maxlen = sizeof(int), |
| 5660 | .mode = 0644, |
| 5661 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5662 | }, |
| 5663 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5664 | .procname = "autoconf", |
| 5665 | .data = &ipv6_devconf.autoconf, |
| 5666 | .maxlen = sizeof(int), |
| 5667 | .mode = 0644, |
| 5668 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5669 | }, |
| 5670 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5671 | .procname = "dad_transmits", |
| 5672 | .data = &ipv6_devconf.dad_transmits, |
| 5673 | .maxlen = sizeof(int), |
| 5674 | .mode = 0644, |
| 5675 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5676 | }, |
| 5677 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5678 | .procname = "router_solicitations", |
| 5679 | .data = &ipv6_devconf.rtr_solicits, |
| 5680 | .maxlen = sizeof(int), |
| 5681 | .mode = 0644, |
| 5682 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5683 | }, |
| 5684 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5685 | .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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5690 | }, |
| 5691 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5692 | .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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5697 | }, |
| 5698 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5699 | .procname = "force_mld_version", |
| 5700 | .data = &ipv6_devconf.force_mld_version, |
| 5701 | .maxlen = sizeof(int), |
| 5702 | .mode = 0644, |
| 5703 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5704 | }, |
Hannes Frederic Sowa | fc4eba5 | 2013-08-14 01:03:46 +0200 | [diff] [blame] | 5705 | { |
| 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5721 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5722 | .procname = "use_tempaddr", |
| 5723 | .data = &ipv6_devconf.use_tempaddr, |
| 5724 | .maxlen = sizeof(int), |
| 5725 | .mode = 0644, |
| 5726 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5727 | }, |
| 5728 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5729 | .procname = "temp_valid_lft", |
| 5730 | .data = &ipv6_devconf.temp_valid_lft, |
| 5731 | .maxlen = sizeof(int), |
| 5732 | .mode = 0644, |
| 5733 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5734 | }, |
| 5735 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5736 | .procname = "temp_prefered_lft", |
| 5737 | .data = &ipv6_devconf.temp_prefered_lft, |
| 5738 | .maxlen = sizeof(int), |
| 5739 | .mode = 0644, |
| 5740 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5741 | }, |
| 5742 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5743 | .procname = "regen_max_retry", |
| 5744 | .data = &ipv6_devconf.regen_max_retry, |
| 5745 | .maxlen = sizeof(int), |
| 5746 | .mode = 0644, |
| 5747 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5748 | }, |
| 5749 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5750 | .procname = "max_desync_factor", |
| 5751 | .data = &ipv6_devconf.max_desync_factor, |
| 5752 | .maxlen = sizeof(int), |
| 5753 | .mode = 0644, |
| 5754 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5755 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5756 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5757 | .procname = "max_addresses", |
| 5758 | .data = &ipv6_devconf.max_addresses, |
| 5759 | .maxlen = sizeof(int), |
| 5760 | .mode = 0644, |
| 5761 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5762 | }, |
| 5763 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5764 | .procname = "accept_ra_defrtr", |
| 5765 | .data = &ipv6_devconf.accept_ra_defrtr, |
| 5766 | .maxlen = sizeof(int), |
| 5767 | .mode = 0644, |
| 5768 | .proc_handler = proc_dointvec, |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 5769 | }, |
| 5770 | { |
Hangbin Liu | 8013d1d | 2015-07-30 14:28:42 +0800 | [diff] [blame] | 5771 | .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 Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5778 | .procname = "accept_ra_pinfo", |
| 5779 | .data = &ipv6_devconf.accept_ra_pinfo, |
| 5780 | .maxlen = sizeof(int), |
| 5781 | .mode = 0644, |
| 5782 | .proc_handler = proc_dointvec, |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 5783 | }, |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 5784 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 5785 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5786 | .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 Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 5791 | }, |
YOSHIFUJI Hideaki | 52e1635 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 5792 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5793 | .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 Hideaki | 52e1635 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 5798 | }, |
Neil Horman | fa03ef3 | 2007-01-30 14:30:10 -0800 | [diff] [blame] | 5799 | #ifdef CONFIG_IPV6_ROUTE_INFO |
YOSHIFUJI Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 5800 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5801 | .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 Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 5806 | }, |
| 5807 | #endif |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 5808 | #endif |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 5809 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5810 | .procname = "proxy_ndp", |
| 5811 | .data = &ipv6_devconf.proxy_ndp, |
| 5812 | .maxlen = sizeof(int), |
| 5813 | .mode = 0644, |
stephen hemminger | c92d549 | 2013-12-17 22:37:14 -0800 | [diff] [blame] | 5814 | .proc_handler = addrconf_sysctl_proxy_ndp, |
YOSHIFUJI Hideaki | fbea49e | 2006-09-22 14:43:49 -0700 | [diff] [blame] | 5815 | }, |
| 5816 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5817 | .procname = "accept_source_route", |
| 5818 | .data = &ipv6_devconf.accept_source_route, |
| 5819 | .maxlen = sizeof(int), |
| 5820 | .mode = 0644, |
| 5821 | .proc_handler = proc_dointvec, |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 5822 | }, |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 5823 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 5824 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5825 | .procname = "optimistic_dad", |
| 5826 | .data = &ipv6_devconf.optimistic_dad, |
| 5827 | .maxlen = sizeof(int), |
| 5828 | .mode = 0644, |
| 5829 | .proc_handler = proc_dointvec, |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 5830 | |
| 5831 | }, |
Erik Kline | 7fd2561 | 2014-10-28 18:11:14 +0900 | [diff] [blame] | 5832 | { |
| 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 Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 5840 | #endif |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 5841 | #ifdef CONFIG_IPV6_MROUTE |
| 5842 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5843 | .procname = "mc_forwarding", |
| 5844 | .data = &ipv6_devconf.mc_forwarding, |
| 5845 | .maxlen = sizeof(int), |
| 5846 | .mode = 0444, |
| 5847 | .proc_handler = proc_dointvec, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 5848 | }, |
| 5849 | #endif |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 5850 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5851 | .procname = "disable_ipv6", |
| 5852 | .data = &ipv6_devconf.disable_ipv6, |
| 5853 | .maxlen = sizeof(int), |
| 5854 | .mode = 0644, |
| 5855 | .proc_handler = addrconf_sysctl_disable, |
YOSHIFUJI Hideaki | 778d80b | 2008-06-28 14:17:11 +0900 | [diff] [blame] | 5856 | }, |
| 5857 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5858 | .procname = "accept_dad", |
| 5859 | .data = &ipv6_devconf.accept_dad, |
| 5860 | .maxlen = sizeof(int), |
| 5861 | .mode = 0644, |
| 5862 | .proc_handler = proc_dointvec, |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 5863 | }, |
| 5864 | { |
Octavian Purdila | f7734fd | 2009-10-02 11:39:15 +0000 | [diff] [blame] | 5865 | .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 Sowa | 5cb0443 | 2012-11-06 16:46:20 +0000 | [diff] [blame] | 5872 | .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 Sowa | b800c3b | 2013-08-27 01:36:51 +0200 | [diff] [blame] | 5879 | .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 Greear | d933319 | 2014-06-25 14:44:53 -0700 | [diff] [blame] | 5886 | .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 Hedeshian | c2943f1 | 2015-01-20 10:06:05 -0700 | [diff] [blame] | 5893 | .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 Sowa | 3d1bec9 | 2015-03-23 23:36:00 +0100 | [diff] [blame] | 5900 | .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 Kline | 3985e8a | 2015-07-22 16:38:25 +0900 | [diff] [blame] | 5907 | .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 Gospodarek | 35103d1 | 2015-08-13 10:39:01 -0400 | [diff] [blame] | 5912 | }, |
| 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 Kline | 3985e8a | 2015-07-22 16:38:25 +0900 | [diff] [blame] | 5919 | }, |
| 5920 | { |
Johannes Berg | abbc304 | 2016-02-04 13:31:19 +0100 | [diff] [blame] | 5921 | .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 Berg | 7a02bf8 | 2016-02-04 13:31:20 +0100 | [diff] [blame] | 5928 | .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 Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 5935 | .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. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 5943 | /* sentinel */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5944 | } |
| 5945 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5946 | }; |
| 5947 | |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 5948 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 5949 | struct inet6_dev *idev, struct ipv6_devconf *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5950 | { |
| 5951 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5952 | struct addrconf_sysctl_table *t; |
Eric W. Biederman | 6105e29 | 2012-04-19 13:41:24 +0000 | [diff] [blame] | 5953 | char path[sizeof("net/ipv6/conf/") + IFNAMSIZ]; |
Pavel Emelyanov | 1dab622 | 2007-12-02 00:59:38 +1100 | [diff] [blame] | 5954 | |
Arnaldo Carvalho de Melo | af879cc | 2006-11-17 12:14:37 -0200 | [diff] [blame] | 5955 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 5956 | if (!t) |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 5957 | goto out; |
| 5958 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 5959 | for (i = 0; t->addrconf_vars[i].data; i++) { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5960 | t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5961 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 5962 | t->addrconf_vars[i].extra2 = net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5963 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5964 | |
Eric W. Biederman | 6105e29 | 2012-04-19 13:41:24 +0000 | [diff] [blame] | 5965 | snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5966 | |
Eric W. Biederman | 6105e29 | 2012-04-19 13:41:24 +0000 | [diff] [blame] | 5967 | t->sysctl_header = register_net_sysctl(net, path, t->addrconf_vars); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 5968 | if (!t->sysctl_header) |
Eric W. Biederman | 6105e29 | 2012-04-19 13:41:24 +0000 | [diff] [blame] | 5969 | goto free; |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 5970 | |
| 5971 | p->sysctl = t; |
Pavel Emelyanov | 9589731 | 2008-01-10 17:41:45 -0800 | [diff] [blame] | 5972 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5973 | |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 5974 | free: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5975 | kfree(t); |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 5976 | out: |
Pavel Emelyanov | 9589731 | 2008-01-10 17:41:45 -0800 | [diff] [blame] | 5977 | return -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5978 | } |
| 5979 | |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 5980 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
| 5981 | { |
| 5982 | struct addrconf_sysctl_table *t; |
| 5983 | |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 5984 | if (!p->sysctl) |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 5985 | return; |
| 5986 | |
| 5987 | t = p->sysctl; |
| 5988 | p->sysctl = NULL; |
Lucian Adrian Grijincu | ff53881 | 2011-05-01 01:44:01 +0000 | [diff] [blame] | 5989 | unregister_net_sysctl_table(t->sysctl_header); |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 5990 | kfree(t); |
| 5991 | } |
| 5992 | |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 5993 | static int addrconf_sysctl_register(struct inet6_dev *idev) |
Pavel Emelyanov | f52295a | 2007-12-02 00:58:37 +1100 | [diff] [blame] | 5994 | { |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 5995 | 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 Emelyanov | f52295a | 2007-12-02 00:58:37 +1100 | [diff] [blame] | 6010 | } |
| 6011 | |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 6012 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6013 | { |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 6014 | __addrconf_sysctl_unregister(&idev->cnf); |
| 6015 | neigh_sysctl_unregister(idev->nd_parms); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6016 | } |
| 6017 | |
| 6018 | |
| 6019 | #endif |
| 6020 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 6021 | static int __net_init addrconf_init_net(struct net *net) |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6022 | { |
Hong Zhiguo | a79ca22 | 2013-03-26 01:52:45 +0800 | [diff] [blame] | 6023 | int err = -ENOMEM; |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6024 | struct ipv6_devconf *all, *dflt; |
| 6025 | |
Hong Zhiguo | a79ca22 | 2013-03-26 01:52:45 +0800 | [diff] [blame] | 6026 | all = kmemdup(&ipv6_devconf, sizeof(ipv6_devconf), GFP_KERNEL); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 6027 | if (!all) |
Hong Zhiguo | a79ca22 | 2013-03-26 01:52:45 +0800 | [diff] [blame] | 6028 | goto err_alloc_all; |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6029 | |
Hong Zhiguo | a79ca22 | 2013-03-26 01:52:45 +0800 | [diff] [blame] | 6030 | dflt = kmemdup(&ipv6_devconf_dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 6031 | if (!dflt) |
Hong Zhiguo | a79ca22 | 2013-03-26 01:52:45 +0800 | [diff] [blame] | 6032 | goto err_alloc_dflt; |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6033 | |
Hong Zhiguo | a79ca22 | 2013-03-26 01:52:45 +0800 | [diff] [blame] | 6034 | /* these will be inherited by all namespaces */ |
| 6035 | dflt->autoconf = ipv6_defaults.autoconf; |
| 6036 | dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6037 | |
Hannes Frederic Sowa | 3d1bec9 | 2015-03-23 23:36:00 +0100 | [diff] [blame] | 6038 | dflt->stable_secret.initialized = false; |
| 6039 | all->stable_secret.initialized = false; |
| 6040 | |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6041 | net->ipv6.devconf_all = all; |
| 6042 | net->ipv6.devconf_dflt = dflt; |
| 6043 | |
| 6044 | #ifdef CONFIG_SYSCTL |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 6045 | err = __addrconf_sysctl_register(net, "all", NULL, all); |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6046 | if (err < 0) |
| 6047 | goto err_reg_all; |
| 6048 | |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 6049 | err = __addrconf_sysctl_register(net, "default", NULL, dflt); |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6050 | if (err < 0) |
| 6051 | goto err_reg_dflt; |
| 6052 | #endif |
| 6053 | return 0; |
| 6054 | |
| 6055 | #ifdef CONFIG_SYSCTL |
| 6056 | err_reg_dflt: |
| 6057 | __addrconf_sysctl_unregister(all); |
| 6058 | err_reg_all: |
| 6059 | kfree(dflt); |
| 6060 | #endif |
| 6061 | err_alloc_dflt: |
| 6062 | kfree(all); |
| 6063 | err_alloc_all: |
| 6064 | return err; |
| 6065 | } |
| 6066 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 6067 | static void __net_exit addrconf_exit_net(struct net *net) |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6068 | { |
| 6069 | #ifdef CONFIG_SYSCTL |
| 6070 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); |
| 6071 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); |
| 6072 | #endif |
zhuyj | 73cf0e9 | 2014-11-26 10:25:58 +0800 | [diff] [blame] | 6073 | kfree(net->ipv6.devconf_dflt); |
| 6074 | kfree(net->ipv6.devconf_all); |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6075 | } |
| 6076 | |
| 6077 | static struct pernet_operations addrconf_ops = { |
| 6078 | .init = addrconf_init_net, |
| 6079 | .exit = addrconf_exit_net, |
| 6080 | }; |
| 6081 | |
Daniel Borkmann | 207895f | 2015-01-29 12:15:03 +0100 | [diff] [blame] | 6082 | static struct rtnl_af_ops inet6_ops __read_mostly = { |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 6083 | .family = AF_INET6, |
| 6084 | .fill_link_af = inet6_fill_link_af, |
| 6085 | .get_link_af_size = inet6_get_link_af_size, |
Daniel Borkmann | 11b1f82 | 2015-02-05 14:39:11 +0100 | [diff] [blame] | 6086 | .validate_link_af = inet6_validate_link_af, |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 6087 | .set_link_af = inet6_set_link_af, |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 6088 | }; |
| 6089 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6090 | /* |
| 6091 | * Init / cleanup code |
| 6092 | */ |
| 6093 | |
| 6094 | int __init addrconf_init(void) |
| 6095 | { |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 6096 | struct inet6_dev *idev; |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 6097 | int i, err; |
YOSHIFUJI Hideaki | 2a8cc6c | 2007-11-14 15:56:23 +0900 | [diff] [blame] | 6098 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 6099 | err = ipv6_addr_label_init(); |
| 6100 | if (err < 0) { |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 6101 | pr_crit("%s: cannot initialize default policy table: %d\n", |
| 6102 | __func__, err); |
Neil Horman | 2cc6d2b | 2010-09-24 09:55:52 +0000 | [diff] [blame] | 6103 | goto out; |
YOSHIFUJI Hideaki | 2a8cc6c | 2007-11-14 15:56:23 +0900 | [diff] [blame] | 6104 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6105 | |
Neil Horman | 2cc6d2b | 2010-09-24 09:55:52 +0000 | [diff] [blame] | 6106 | err = register_pernet_subsys(&addrconf_ops); |
| 6107 | if (err < 0) |
| 6108 | goto out_addrlabel; |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6109 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 6110 | addrconf_wq = create_workqueue("ipv6_addrconf"); |
| 6111 | if (!addrconf_wq) { |
| 6112 | err = -ENOMEM; |
| 6113 | goto out_nowq; |
| 6114 | } |
| 6115 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6116 | /* 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 Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 6135 | idev = ipv6_add_dev(init_net.loopback_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6136 | rtnl_unlock(); |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 6137 | if (IS_ERR(idev)) { |
| 6138 | err = PTR_ERR(idev); |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6139 | goto errlo; |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 6140 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6141 | |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 6142 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
| 6143 | INIT_HLIST_HEAD(&inet6_addr_lst[i]); |
| 6144 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6145 | register_netdevice_notifier(&ipv6_dev_notf); |
| 6146 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 6147 | addrconf_verify(); |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 6148 | |
stephen hemminger | 3678a9d | 2013-12-30 10:41:32 -0800 | [diff] [blame] | 6149 | rtnl_af_register(&inet6_ops); |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 6150 | |
Greg Rose | c7ac867 | 2011-06-10 01:27:09 +0000 | [diff] [blame] | 6151 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo, |
| 6152 | NULL); |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 6153 | if (err < 0) |
| 6154 | goto errout; |
| 6155 | |
| 6156 | /* Only the first call to __rtnl_register can fail */ |
Greg Rose | c7ac867 | 2011-06-10 01:27:09 +0000 | [diff] [blame] | 6157 | __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 Dichtel | 76f8f6c | 2012-10-25 22:28:51 +0000 | [diff] [blame] | 6165 | __rtnl_register(PF_INET6, RTM_GETNETCONF, inet6_netconf_get_devconf, |
Nicolas Dichtel | 7a67420 | 2013-03-05 23:42:06 +0000 | [diff] [blame] | 6166 | inet6_netconf_dump_devconf, NULL); |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 6167 | |
YOSHIFUJI Hideaki | 2a8cc6c | 2007-11-14 15:56:23 +0900 | [diff] [blame] | 6168 | ipv6_addr_label_rtnl_register(); |
| 6169 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6170 | return 0; |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 6171 | errout: |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 6172 | rtnl_af_unregister(&inet6_ops); |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 6173 | unregister_netdevice_notifier(&ipv6_dev_notf); |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6174 | errlo: |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 6175 | destroy_workqueue(addrconf_wq); |
| 6176 | out_nowq: |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6177 | unregister_pernet_subsys(&addrconf_ops); |
Neil Horman | 2cc6d2b | 2010-09-24 09:55:52 +0000 | [diff] [blame] | 6178 | out_addrlabel: |
| 6179 | ipv6_addr_label_cleanup(); |
| 6180 | out: |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 6181 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6182 | } |
| 6183 | |
Daniel Lezcano | 09f7709 | 2007-12-13 05:34:58 -0800 | [diff] [blame] | 6184 | void addrconf_cleanup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6185 | { |
Daniel Lezcano | 176c39a | 2009-03-03 01:06:45 -0800 | [diff] [blame] | 6186 | struct net_device *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6187 | int i; |
| 6188 | |
| 6189 | unregister_netdevice_notifier(&ipv6_dev_notf); |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6190 | unregister_pernet_subsys(&addrconf_ops); |
Neil Horman | 2cc6d2b | 2010-09-24 09:55:52 +0000 | [diff] [blame] | 6191 | ipv6_addr_label_cleanup(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6192 | |
| 6193 | rtnl_lock(); |
| 6194 | |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 6195 | __rtnl_af_unregister(&inet6_ops); |
| 6196 | |
Daniel Lezcano | 176c39a | 2009-03-03 01:06:45 -0800 | [diff] [blame] | 6197 | /* 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6205 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6206 | * Check hash table. |
| 6207 | */ |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 6208 | spin_lock_bh(&addrconf_hash_lock); |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 6209 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
| 6210 | WARN_ON(!hlist_empty(&inet6_addr_lst[i])); |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 6211 | spin_unlock_bh(&addrconf_hash_lock); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 6212 | cancel_delayed_work(&addr_chk_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6213 | rtnl_unlock(); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 6214 | |
| 6215 | destroy_workqueue(addrconf_wq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6216 | } |