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 | |
Maciej Żenczykowski | bd11f07 | 2016-09-27 23:57:58 -0700 | [diff] [blame] | 115 | static inline s32 rfc3315_s14_backoff_init(s32 irt) |
| 116 | { |
| 117 | /* multiply 'initial retransmission time' by 0.9 .. 1.1 */ |
| 118 | u64 tmp = (900000 + prandom_u32() % 200001) * (u64)irt; |
| 119 | do_div(tmp, 1000000); |
| 120 | return (s32)tmp; |
| 121 | } |
| 122 | |
| 123 | static inline s32 rfc3315_s14_backoff_update(s32 rt, s32 mrt) |
| 124 | { |
| 125 | /* multiply 'retransmission timeout' by 1.9 .. 2.1 */ |
| 126 | u64 tmp = (1900000 + prandom_u32() % 200001) * (u64)rt; |
| 127 | do_div(tmp, 1000000); |
| 128 | if ((s32)tmp > mrt) { |
| 129 | /* multiply 'maximum retransmission time' by 0.9 .. 1.1 */ |
| 130 | tmp = (900000 + prandom_u32() % 200001) * (u64)mrt; |
| 131 | do_div(tmp, 1000000); |
| 132 | } |
| 133 | return (s32)tmp; |
| 134 | } |
| 135 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | #ifdef CONFIG_SYSCTL |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 137 | static int addrconf_sysctl_register(struct inet6_dev *idev); |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 138 | static void addrconf_sysctl_unregister(struct inet6_dev *idev); |
| 139 | #else |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 140 | static inline int addrconf_sysctl_register(struct inet6_dev *idev) |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 141 | { |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 142 | return 0; |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 143 | } |
| 144 | |
| 145 | static inline void addrconf_sysctl_unregister(struct inet6_dev *idev) |
| 146 | { |
| 147 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | #endif |
| 149 | |
Jiri Bohac | 9d6280d | 2016-10-13 18:50:02 +0200 | [diff] [blame] | 150 | static void ipv6_regen_rndid(struct inet6_dev *idev); |
| 151 | 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] | 152 | |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 153 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | static int ipv6_count_addresses(struct inet6_dev *idev); |
Hannes Frederic Sowa | 622c81d5 | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 155 | static int ipv6_generate_stable_address(struct in6_addr *addr, |
| 156 | u8 dad_count, |
| 157 | const struct inet6_dev *idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | |
| 159 | /* |
| 160 | * Configured unicast address hash table |
| 161 | */ |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 162 | static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE]; |
stephen hemminger | 5c578aed | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 163 | static DEFINE_SPINLOCK(addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 165 | static void addrconf_verify(void); |
| 166 | static void addrconf_verify_rtnl(void); |
| 167 | static void addrconf_verify_work(struct work_struct *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 169 | static struct workqueue_struct *addrconf_wq; |
| 170 | static DECLARE_DELAYED_WORK(addr_chk_work, addrconf_verify_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | |
| 172 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); |
| 173 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); |
| 174 | |
Jiri Pirko | 93d9b7d | 2010-03-10 10:28:56 +0000 | [diff] [blame] | 175 | static void addrconf_type_change(struct net_device *dev, |
| 176 | unsigned long event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | static int addrconf_ifdown(struct net_device *dev, int how); |
| 178 | |
Romain Kuntz | 21caa66 | 2013-01-09 21:06:03 +0000 | [diff] [blame] | 179 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, |
| 180 | int plen, |
| 181 | const struct net_device *dev, |
| 182 | u32 flags, u32 noflags); |
| 183 | |
David S. Miller | cf22f9a | 2012-04-14 21:37:40 -0400 | [diff] [blame] | 184 | static void addrconf_dad_start(struct inet6_ifaddr *ifp); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 185 | static void addrconf_dad_work(struct work_struct *w); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 187 | static void addrconf_dad_run(struct inet6_dev *idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | static void addrconf_rs_timer(unsigned long data); |
| 189 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); |
| 190 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); |
| 191 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 192 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | struct prefix_info *pinfo); |
David S. Miller | 3e81c6d | 2010-03-20 16:18:00 -0700 | [diff] [blame] | 194 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
| 195 | struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | |
Adrian Bunk | 888c848 | 2008-07-22 14:21:58 -0700 | [diff] [blame] | 197 | static struct ipv6_devconf ipv6_devconf __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | .forwarding = 0, |
| 199 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, |
| 200 | .mtu6 = IPV6_MIN_MTU, |
| 201 | .accept_ra = 1, |
| 202 | .accept_redirects = 1, |
| 203 | .autoconf = 1, |
| 204 | .force_mld_version = 0, |
Hannes Frederic Sowa | fc4eba5 | 2013-08-14 01:03:46 +0200 | [diff] [blame] | 205 | .mldv1_unsolicited_report_interval = 10 * HZ, |
| 206 | .mldv2_unsolicited_report_interval = HZ, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | .dad_transmits = 1, |
| 208 | .rtr_solicits = MAX_RTR_SOLICITATIONS, |
| 209 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, |
Maciej Żenczykowski | bd11f07 | 2016-09-27 23:57:58 -0700 | [diff] [blame] | 210 | .rtr_solicit_max_interval = RTR_SOLICITATION_MAX_INTERVAL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 212 | .use_tempaddr = 0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | .temp_valid_lft = TEMP_VALID_LIFETIME, |
| 214 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, |
| 215 | .regen_max_retry = REGEN_MAX_RETRY, |
| 216 | .max_desync_factor = MAX_DESYNC_FACTOR, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | .max_addresses = IPV6_MAX_ADDRESSES, |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 218 | .accept_ra_defrtr = 1, |
Ben Greear | d933319 | 2014-06-25 14:44:53 -0700 | [diff] [blame] | 219 | .accept_ra_from_local = 0, |
Hangbin Liu | 8013d1d7 | 2015-07-30 14:28:42 +0800 | [diff] [blame] | 220 | .accept_ra_min_hop_limit= 1, |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 221 | .accept_ra_pinfo = 1, |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 222 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 223 | .accept_ra_rtr_pref = 1, |
YOSHIFUJI Hideaki | 52e16356 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 224 | .rtr_probe_interval = 60 * HZ, |
YOSHIFUJI Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 225 | #ifdef CONFIG_IPV6_ROUTE_INFO |
| 226 | .accept_ra_rt_info_max_plen = 0, |
| 227 | #endif |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 228 | #endif |
YOSHIFUJI Hideaki | fbea49e | 2006-09-22 14:43:49 -0700 | [diff] [blame] | 229 | .proxy_ndp = 0, |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 230 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
YOSHIFUJI Hideaki | 778d80b | 2008-06-28 14:17:11 +0900 | [diff] [blame] | 231 | .disable_ipv6 = 0, |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 232 | .accept_dad = 1, |
Hannes Frederic Sowa | b800c3b | 2013-08-27 01:36:51 +0200 | [diff] [blame] | 233 | .suppress_frag_ndisc = 1, |
Harout Hedeshian | c2943f1 | 2015-01-20 10:06:05 -0700 | [diff] [blame] | 234 | .accept_ra_mtu = 1, |
Hannes Frederic Sowa | 3d1bec9 | 2015-03-23 23:36:00 +0100 | [diff] [blame] | 235 | .stable_secret = { |
| 236 | .initialized = false, |
Erik Kline | 3985e8a | 2015-07-22 16:38:25 +0900 | [diff] [blame] | 237 | }, |
| 238 | .use_oif_addrs_only = 0, |
Andy Gospodarek | 35103d1 | 2015-08-13 10:39:01 -0400 | [diff] [blame] | 239 | .ignore_routes_with_linkdown = 0, |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 240 | .keep_addr_on_down = 0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | }; |
| 242 | |
Brian Haley | ab32ea5 | 2006-09-22 14:15:41 -0700 | [diff] [blame] | 243 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | .forwarding = 0, |
| 245 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, |
| 246 | .mtu6 = IPV6_MIN_MTU, |
| 247 | .accept_ra = 1, |
| 248 | .accept_redirects = 1, |
| 249 | .autoconf = 1, |
Hannes Frederic Sowa | fc4eba5 | 2013-08-14 01:03:46 +0200 | [diff] [blame] | 250 | .force_mld_version = 0, |
| 251 | .mldv1_unsolicited_report_interval = 10 * HZ, |
| 252 | .mldv2_unsolicited_report_interval = HZ, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | .dad_transmits = 1, |
| 254 | .rtr_solicits = MAX_RTR_SOLICITATIONS, |
| 255 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, |
Maciej Żenczykowski | bd11f07 | 2016-09-27 23:57:58 -0700 | [diff] [blame] | 256 | .rtr_solicit_max_interval = RTR_SOLICITATION_MAX_INTERVAL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | .use_tempaddr = 0, |
| 259 | .temp_valid_lft = TEMP_VALID_LIFETIME, |
| 260 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, |
| 261 | .regen_max_retry = REGEN_MAX_RETRY, |
| 262 | .max_desync_factor = MAX_DESYNC_FACTOR, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | .max_addresses = IPV6_MAX_ADDRESSES, |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 264 | .accept_ra_defrtr = 1, |
Ben Greear | d933319 | 2014-06-25 14:44:53 -0700 | [diff] [blame] | 265 | .accept_ra_from_local = 0, |
Hangbin Liu | 8013d1d7 | 2015-07-30 14:28:42 +0800 | [diff] [blame] | 266 | .accept_ra_min_hop_limit= 1, |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 267 | .accept_ra_pinfo = 1, |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 268 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 269 | .accept_ra_rtr_pref = 1, |
YOSHIFUJI Hideaki | 52e16356 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 270 | .rtr_probe_interval = 60 * HZ, |
YOSHIFUJI Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 271 | #ifdef CONFIG_IPV6_ROUTE_INFO |
| 272 | .accept_ra_rt_info_max_plen = 0, |
| 273 | #endif |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 274 | #endif |
YOSHIFUJI Hideaki | fbea49e | 2006-09-22 14:43:49 -0700 | [diff] [blame] | 275 | .proxy_ndp = 0, |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 276 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
YOSHIFUJI Hideaki | 778d80b | 2008-06-28 14:17:11 +0900 | [diff] [blame] | 277 | .disable_ipv6 = 0, |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 278 | .accept_dad = 1, |
Hannes Frederic Sowa | b800c3b | 2013-08-27 01:36:51 +0200 | [diff] [blame] | 279 | .suppress_frag_ndisc = 1, |
Harout Hedeshian | c2943f1 | 2015-01-20 10:06:05 -0700 | [diff] [blame] | 280 | .accept_ra_mtu = 1, |
Hannes Frederic Sowa | 3d1bec9 | 2015-03-23 23:36:00 +0100 | [diff] [blame] | 281 | .stable_secret = { |
| 282 | .initialized = false, |
| 283 | }, |
Erik Kline | 3985e8a | 2015-07-22 16:38:25 +0900 | [diff] [blame] | 284 | .use_oif_addrs_only = 0, |
Andy Gospodarek | 35103d1 | 2015-08-13 10:39:01 -0400 | [diff] [blame] | 285 | .ignore_routes_with_linkdown = 0, |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 286 | .keep_addr_on_down = 0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | }; |
| 288 | |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 289 | /* Check if a valid qdisc is available */ |
David S. Miller | 0529794 | 2008-07-08 23:01:27 -0700 | [diff] [blame] | 290 | static inline bool addrconf_qdisc_ok(const struct net_device *dev) |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 291 | { |
David S. Miller | 0529794 | 2008-07-08 23:01:27 -0700 | [diff] [blame] | 292 | return !qdisc_tx_is_noop(dev); |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 293 | } |
| 294 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 295 | static void addrconf_del_rs_timer(struct inet6_dev *idev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | { |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 297 | if (del_timer(&idev->rs_timer)) |
| 298 | __in6_dev_put(idev); |
| 299 | } |
| 300 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 301 | static void addrconf_del_dad_work(struct inet6_ifaddr *ifp) |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 302 | { |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 303 | if (cancel_delayed_work(&ifp->dad_work)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | __in6_ifa_put(ifp); |
| 305 | } |
| 306 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 307 | static void addrconf_mod_rs_timer(struct inet6_dev *idev, |
| 308 | unsigned long when) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | { |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 310 | if (!timer_pending(&idev->rs_timer)) |
| 311 | in6_dev_hold(idev); |
| 312 | mod_timer(&idev->rs_timer, jiffies + when); |
| 313 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 315 | static void addrconf_mod_dad_work(struct inet6_ifaddr *ifp, |
| 316 | unsigned long delay) |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 317 | { |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 318 | if (!delayed_work_pending(&ifp->dad_work)) |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 319 | in6_ifa_hold(ifp); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 320 | mod_delayed_work(addrconf_wq, &ifp->dad_work, delay); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | } |
| 322 | |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 323 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
| 324 | { |
John Stultz | 827da44 | 2013-10-07 15:51:58 -0700 | [diff] [blame] | 325 | int i; |
| 326 | |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 327 | idev->stats.ipv6 = alloc_percpu(struct ipstats_mib); |
| 328 | if (!idev->stats.ipv6) |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 329 | goto err_ip; |
John Stultz | 827da44 | 2013-10-07 15:51:58 -0700 | [diff] [blame] | 330 | |
| 331 | for_each_possible_cpu(i) { |
| 332 | struct ipstats_mib *addrconf_stats; |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 333 | addrconf_stats = per_cpu_ptr(idev->stats.ipv6, i); |
John Stultz | 827da44 | 2013-10-07 15:51:58 -0700 | [diff] [blame] | 334 | u64_stats_init(&addrconf_stats->syncp); |
John Stultz | 827da44 | 2013-10-07 15:51:58 -0700 | [diff] [blame] | 335 | } |
| 336 | |
| 337 | |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 338 | idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device), |
| 339 | GFP_KERNEL); |
| 340 | if (!idev->stats.icmpv6dev) |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 341 | goto err_icmp; |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 342 | idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device), |
| 343 | GFP_KERNEL); |
| 344 | if (!idev->stats.icmpv6msgdev) |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 345 | goto err_icmpmsg; |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 346 | |
| 347 | return 0; |
| 348 | |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 349 | err_icmpmsg: |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 350 | kfree(idev->stats.icmpv6dev); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 351 | err_icmp: |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 352 | free_percpu(idev->stats.ipv6); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 353 | err_ip: |
Pavel Emelyanov | aaf70ec | 2007-10-17 21:25:32 -0700 | [diff] [blame] | 354 | return -ENOMEM; |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 355 | } |
| 356 | |
Eldad Zack | 8e5e8f3 | 2012-04-01 07:49:08 +0000 | [diff] [blame] | 357 | static struct inet6_dev *ipv6_add_dev(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | { |
| 359 | struct inet6_dev *ndev; |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 360 | int err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | |
| 362 | ASSERT_RTNL(); |
| 363 | |
| 364 | if (dev->mtu < IPV6_MIN_MTU) |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 365 | return ERR_PTR(-EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 367 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 368 | if (!ndev) |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 369 | return ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 371 | rwlock_init(&ndev->lock); |
| 372 | ndev->dev = dev; |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 373 | INIT_LIST_HEAD(&ndev->addr_list); |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 374 | setup_timer(&ndev->rs_timer, addrconf_rs_timer, |
| 375 | (unsigned long)ndev); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 376 | 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] | 377 | |
| 378 | if (ndev->cnf.stable_secret.initialized) |
| 379 | ndev->addr_gen_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY; |
| 380 | else |
| 381 | ndev->addr_gen_mode = IN6_ADDR_GEN_MODE_EUI64; |
| 382 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 383 | ndev->cnf.mtu6 = dev->mtu; |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 384 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 385 | if (!ndev->nd_parms) { |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 386 | kfree(ndev); |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 387 | return ERR_PTR(err); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 388 | } |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 389 | if (ndev->cnf.forwarding) |
| 390 | dev_disable_lro(dev); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 391 | /* We refer to the device */ |
| 392 | dev_hold(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 394 | if (snmp6_alloc_dev(ndev) < 0) { |
dingtianhong | ba3542e | 2013-08-17 10:27:04 +0800 | [diff] [blame] | 395 | ADBG(KERN_WARNING |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 396 | "%s: cannot allocate memory for statistics; dev=%s.\n", |
dingtianhong | ba3542e | 2013-08-17 10:27:04 +0800 | [diff] [blame] | 397 | __func__, dev->name); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 398 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
Roy Li | 8603e33 | 2011-09-20 15:10:16 -0400 | [diff] [blame] | 399 | dev_put(dev); |
| 400 | kfree(ndev); |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 401 | return ERR_PTR(err); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 402 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 404 | if (snmp6_register_dev(ndev) < 0) { |
dingtianhong | ba3542e | 2013-08-17 10:27:04 +0800 | [diff] [blame] | 405 | ADBG(KERN_WARNING |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 406 | "%s: cannot create /proc/net/dev_snmp6/%s\n", |
dingtianhong | ba3542e | 2013-08-17 10:27:04 +0800 | [diff] [blame] | 407 | __func__, dev->name); |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 408 | goto err_release; |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 409 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | |
Jiri Bohac | 9d6280d | 2016-10-13 18:50:02 +0200 | [diff] [blame] | 411 | /* One reference from device. */ |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 412 | in6_dev_hold(ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 414 | if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) |
| 415 | ndev->cnf.accept_dad = -1; |
| 416 | |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 417 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
YOSHIFUJI Hideaki | b077d7a | 2008-04-13 23:42:18 -0700 | [diff] [blame] | 418 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 419 | pr_info("%s: Disabled Multicast RS\n", dev->name); |
YOSHIFUJI Hideaki | b077d7a | 2008-04-13 23:42:18 -0700 | [diff] [blame] | 420 | ndev->cnf.rtr_solicits = 0; |
| 421 | } |
| 422 | #endif |
| 423 | |
stephen hemminger | 372e6c8 | 2010-03-17 20:31:09 +0000 | [diff] [blame] | 424 | INIT_LIST_HEAD(&ndev->tempaddr_list); |
Jiri Bohac | 76506a9 | 2016-10-13 18:52:15 +0200 | [diff] [blame] | 425 | ndev->desync_factor = U32_MAX; |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 426 | if ((dev->flags&IFF_LOOPBACK) || |
| 427 | dev->type == ARPHRD_TUNNEL || |
YOSHIFUJI Hideaki | 9625ed7 | 2008-04-13 23:47:11 -0700 | [diff] [blame] | 428 | dev->type == ARPHRD_TUNNEL6 || |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 429 | dev->type == ARPHRD_SIT || |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 430 | dev->type == ARPHRD_NONE) { |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 431 | ndev->cnf.use_tempaddr = -1; |
Jiri Bohac | 9d6280d | 2016-10-13 18:50:02 +0200 | [diff] [blame] | 432 | } else |
| 433 | ipv6_regen_rndid(ndev); |
David S. Miller | 5d9efa7 | 2013-10-28 20:07:50 -0400 | [diff] [blame] | 434 | |
Daniel Borkmann | 914faa1 | 2013-04-09 03:47:14 +0000 | [diff] [blame] | 435 | ndev->token = in6addr_any; |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 436 | |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 437 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
Herbert Xu | 53aadcc | 2007-03-27 14:31:52 -0700 | [diff] [blame] | 438 | ndev->if_flags |= IF_READY; |
| 439 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 440 | ipv6_mc_init_dev(ndev); |
| 441 | ndev->tstamp = jiffies; |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 442 | err = addrconf_sysctl_register(ndev); |
| 443 | if (err) { |
| 444 | ipv6_mc_destroy_dev(ndev); |
Sabrina Dubroca | 2a189f9e | 2015-11-04 14:47:53 +0100 | [diff] [blame] | 445 | snmp6_unregister_dev(ndev); |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 446 | goto err_release; |
| 447 | } |
David L Stevens | 30c4cf5 | 2007-01-04 12:31:14 -0800 | [diff] [blame] | 448 | /* protected by rtnl_lock */ |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 449 | rcu_assign_pointer(dev->ip6_ptr, ndev); |
YOSHIFUJI Hideaki | d88ae4c | 2007-01-14 21:48:40 -0800 | [diff] [blame] | 450 | |
Hannes Frederic Sowa | 2c5e893 | 2013-02-10 03:50:18 +0000 | [diff] [blame] | 451 | /* Join interface-local all-node multicast group */ |
| 452 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allnodes); |
| 453 | |
YOSHIFUJI Hideaki | d88ae4c | 2007-01-14 21:48:40 -0800 | [diff] [blame] | 454 | /* Join all-node multicast group */ |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 455 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
YOSHIFUJI Hideaki | d88ae4c | 2007-01-14 21:48:40 -0800 | [diff] [blame] | 456 | |
Li Wei | d6ddef9 | 2012-03-05 14:45:17 +0000 | [diff] [blame] | 457 | /* Join all-router multicast group if forwarding is set */ |
Li Wei | 8b2aaed | 2012-03-07 14:58:07 +0000 | [diff] [blame] | 458 | if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST)) |
Li Wei | d6ddef9 | 2012-03-05 14:45:17 +0000 | [diff] [blame] | 459 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
| 460 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | return ndev; |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 462 | |
| 463 | err_release: |
| 464 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
| 465 | ndev->dead = 1; |
| 466 | in6_dev_finish_destroy(ndev); |
| 467 | return ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | } |
| 469 | |
Eldad Zack | 8e5e8f3 | 2012-04-01 07:49:08 +0000 | [diff] [blame] | 470 | static struct inet6_dev *ipv6_find_idev(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | { |
| 472 | struct inet6_dev *idev; |
| 473 | |
| 474 | ASSERT_RTNL(); |
| 475 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 476 | idev = __in6_dev_get(dev); |
| 477 | if (!idev) { |
| 478 | idev = ipv6_add_dev(dev); |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 479 | if (IS_ERR(idev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | return NULL; |
| 481 | } |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 482 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | if (dev->flags&IFF_UP) |
| 484 | ipv6_mc_up(idev); |
| 485 | return idev; |
| 486 | } |
| 487 | |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 488 | static int inet6_netconf_msgsize_devconf(int type) |
| 489 | { |
| 490 | int size = NLMSG_ALIGN(sizeof(struct netconfmsg)) |
| 491 | + nla_total_size(4); /* NETCONFA_IFINDEX */ |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 492 | bool all = false; |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 493 | |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 494 | if (type == NETCONFA_ALL) |
| 495 | all = true; |
| 496 | |
| 497 | if (all || type == NETCONFA_FORWARDING) |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 498 | size += nla_total_size(4); |
David S. Miller | b1afce9 | 2012-12-04 14:46:34 -0500 | [diff] [blame] | 499 | #ifdef CONFIG_IPV6_MROUTE |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 500 | if (all || type == NETCONFA_MC_FORWARDING) |
Nicolas Dichtel | d67b8c6 | 2012-12-04 01:13:35 +0000 | [diff] [blame] | 501 | size += nla_total_size(4); |
David S. Miller | b1afce9 | 2012-12-04 14:46:34 -0500 | [diff] [blame] | 502 | #endif |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 503 | if (all || type == NETCONFA_PROXY_NEIGH) |
stephen hemminger | c92d549 | 2013-12-17 22:37:14 -0800 | [diff] [blame] | 504 | size += nla_total_size(4); |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 505 | |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 506 | if (all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) |
Andy Gospodarek | 35103d1 | 2015-08-13 10:39:01 -0400 | [diff] [blame] | 507 | size += nla_total_size(4); |
| 508 | |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 509 | return size; |
| 510 | } |
| 511 | |
| 512 | static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex, |
| 513 | struct ipv6_devconf *devconf, u32 portid, |
| 514 | u32 seq, int event, unsigned int flags, |
| 515 | int type) |
| 516 | { |
| 517 | struct nlmsghdr *nlh; |
| 518 | struct netconfmsg *ncm; |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 519 | bool all = false; |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 520 | |
| 521 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg), |
| 522 | flags); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 523 | if (!nlh) |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 524 | return -EMSGSIZE; |
| 525 | |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 526 | if (type == NETCONFA_ALL) |
| 527 | all = true; |
| 528 | |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 529 | ncm = nlmsg_data(nlh); |
| 530 | ncm->ncm_family = AF_INET6; |
| 531 | |
| 532 | if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0) |
| 533 | goto nla_put_failure; |
| 534 | |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 535 | if ((all || type == NETCONFA_FORWARDING) && |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 536 | nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0) |
| 537 | goto nla_put_failure; |
David S. Miller | b1afce9 | 2012-12-04 14:46:34 -0500 | [diff] [blame] | 538 | #ifdef CONFIG_IPV6_MROUTE |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 539 | if ((all || type == NETCONFA_MC_FORWARDING) && |
Nicolas Dichtel | d67b8c6 | 2012-12-04 01:13:35 +0000 | [diff] [blame] | 540 | nla_put_s32(skb, NETCONFA_MC_FORWARDING, |
| 541 | devconf->mc_forwarding) < 0) |
| 542 | goto nla_put_failure; |
David S. Miller | b1afce9 | 2012-12-04 14:46:34 -0500 | [diff] [blame] | 543 | #endif |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 544 | if ((all || type == NETCONFA_PROXY_NEIGH) && |
stephen hemminger | c92d549 | 2013-12-17 22:37:14 -0800 | [diff] [blame] | 545 | nla_put_s32(skb, NETCONFA_PROXY_NEIGH, devconf->proxy_ndp) < 0) |
| 546 | goto nla_put_failure; |
| 547 | |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 548 | if ((all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) && |
Andy Gospodarek | 35103d1 | 2015-08-13 10:39:01 -0400 | [diff] [blame] | 549 | nla_put_s32(skb, NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, |
| 550 | devconf->ignore_routes_with_linkdown) < 0) |
| 551 | goto nla_put_failure; |
| 552 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 553 | nlmsg_end(skb, nlh); |
| 554 | return 0; |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 555 | |
| 556 | nla_put_failure: |
| 557 | nlmsg_cancel(skb, nlh); |
| 558 | return -EMSGSIZE; |
| 559 | } |
| 560 | |
Nicolas Dichtel | d67b8c6 | 2012-12-04 01:13:35 +0000 | [diff] [blame] | 561 | void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex, |
| 562 | struct ipv6_devconf *devconf) |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 563 | { |
| 564 | struct sk_buff *skb; |
| 565 | int err = -ENOBUFS; |
| 566 | |
Eric Dumazet | 927265b | 2016-07-08 05:46:04 +0200 | [diff] [blame] | 567 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(type), GFP_KERNEL); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 568 | if (!skb) |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 569 | goto errout; |
| 570 | |
| 571 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, 0, 0, |
| 572 | RTM_NEWNETCONF, 0, type); |
| 573 | if (err < 0) { |
| 574 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ |
| 575 | WARN_ON(err == -EMSGSIZE); |
| 576 | kfree_skb(skb); |
| 577 | goto errout; |
| 578 | } |
Eric Dumazet | 927265b | 2016-07-08 05:46:04 +0200 | [diff] [blame] | 579 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_NETCONF, NULL, GFP_KERNEL); |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 580 | return; |
| 581 | errout: |
Cong Ding | bd77902 | 2012-12-18 12:08:56 +0000 | [diff] [blame] | 582 | rtnl_set_sk_err(net, RTNLGRP_IPV6_NETCONF, err); |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 583 | } |
| 584 | |
Nicolas Dichtel | 76f8f6c | 2012-10-25 22:28:51 +0000 | [diff] [blame] | 585 | static const struct nla_policy devconf_ipv6_policy[NETCONFA_MAX+1] = { |
| 586 | [NETCONFA_IFINDEX] = { .len = sizeof(int) }, |
| 587 | [NETCONFA_FORWARDING] = { .len = sizeof(int) }, |
stephen hemminger | c92d549 | 2013-12-17 22:37:14 -0800 | [diff] [blame] | 588 | [NETCONFA_PROXY_NEIGH] = { .len = sizeof(int) }, |
Andy Gospodarek | 35103d1 | 2015-08-13 10:39:01 -0400 | [diff] [blame] | 589 | [NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN] = { .len = sizeof(int) }, |
Nicolas Dichtel | 76f8f6c | 2012-10-25 22:28:51 +0000 | [diff] [blame] | 590 | }; |
| 591 | |
| 592 | static int inet6_netconf_get_devconf(struct sk_buff *in_skb, |
Thomas Graf | 661d296 | 2013-03-21 07:45:29 +0000 | [diff] [blame] | 593 | struct nlmsghdr *nlh) |
Nicolas Dichtel | 76f8f6c | 2012-10-25 22:28:51 +0000 | [diff] [blame] | 594 | { |
| 595 | struct net *net = sock_net(in_skb->sk); |
| 596 | struct nlattr *tb[NETCONFA_MAX+1]; |
| 597 | struct netconfmsg *ncm; |
| 598 | struct sk_buff *skb; |
| 599 | struct ipv6_devconf *devconf; |
| 600 | struct inet6_dev *in6_dev; |
| 601 | struct net_device *dev; |
| 602 | int ifindex; |
| 603 | int err; |
| 604 | |
| 605 | err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX, |
| 606 | devconf_ipv6_policy); |
| 607 | if (err < 0) |
| 608 | goto errout; |
| 609 | |
Anton Protopopov | a97eb33 | 2016-02-16 21:43:16 -0500 | [diff] [blame] | 610 | err = -EINVAL; |
Nicolas Dichtel | 76f8f6c | 2012-10-25 22:28:51 +0000 | [diff] [blame] | 611 | if (!tb[NETCONFA_IFINDEX]) |
| 612 | goto errout; |
| 613 | |
| 614 | ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]); |
| 615 | switch (ifindex) { |
| 616 | case NETCONFA_IFINDEX_ALL: |
| 617 | devconf = net->ipv6.devconf_all; |
| 618 | break; |
| 619 | case NETCONFA_IFINDEX_DEFAULT: |
| 620 | devconf = net->ipv6.devconf_dflt; |
| 621 | break; |
| 622 | default: |
| 623 | dev = __dev_get_by_index(net, ifindex); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 624 | if (!dev) |
Nicolas Dichtel | 76f8f6c | 2012-10-25 22:28:51 +0000 | [diff] [blame] | 625 | goto errout; |
| 626 | in6_dev = __in6_dev_get(dev); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 627 | if (!in6_dev) |
Nicolas Dichtel | 76f8f6c | 2012-10-25 22:28:51 +0000 | [diff] [blame] | 628 | goto errout; |
| 629 | devconf = &in6_dev->cnf; |
| 630 | break; |
| 631 | } |
| 632 | |
| 633 | err = -ENOBUFS; |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 634 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(NETCONFA_ALL), GFP_ATOMIC); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 635 | if (!skb) |
Nicolas Dichtel | 76f8f6c | 2012-10-25 22:28:51 +0000 | [diff] [blame] | 636 | goto errout; |
| 637 | |
| 638 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, |
| 639 | NETLINK_CB(in_skb).portid, |
| 640 | nlh->nlmsg_seq, RTM_NEWNETCONF, 0, |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 641 | NETCONFA_ALL); |
Nicolas Dichtel | 76f8f6c | 2012-10-25 22:28:51 +0000 | [diff] [blame] | 642 | if (err < 0) { |
| 643 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ |
| 644 | WARN_ON(err == -EMSGSIZE); |
| 645 | kfree_skb(skb); |
| 646 | goto errout; |
| 647 | } |
| 648 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); |
| 649 | errout: |
| 650 | return err; |
| 651 | } |
| 652 | |
Nicolas Dichtel | 7a67420 | 2013-03-05 23:42:06 +0000 | [diff] [blame] | 653 | static int inet6_netconf_dump_devconf(struct sk_buff *skb, |
| 654 | struct netlink_callback *cb) |
| 655 | { |
| 656 | struct net *net = sock_net(skb->sk); |
| 657 | int h, s_h; |
| 658 | int idx, s_idx; |
| 659 | struct net_device *dev; |
| 660 | struct inet6_dev *idev; |
| 661 | struct hlist_head *head; |
| 662 | |
| 663 | s_h = cb->args[0]; |
| 664 | s_idx = idx = cb->args[1]; |
| 665 | |
| 666 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
| 667 | idx = 0; |
| 668 | head = &net->dev_index_head[h]; |
| 669 | rcu_read_lock(); |
Nicolas Dichtel | 63998ac | 2013-03-22 06:28:43 +0000 | [diff] [blame] | 670 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ |
| 671 | net->dev_base_seq; |
Nicolas Dichtel | 7a67420 | 2013-03-05 23:42:06 +0000 | [diff] [blame] | 672 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
| 673 | if (idx < s_idx) |
| 674 | goto cont; |
| 675 | idev = __in6_dev_get(dev); |
| 676 | if (!idev) |
| 677 | goto cont; |
| 678 | |
| 679 | if (inet6_netconf_fill_devconf(skb, dev->ifindex, |
| 680 | &idev->cnf, |
| 681 | NETLINK_CB(cb->skb).portid, |
| 682 | cb->nlh->nlmsg_seq, |
| 683 | RTM_NEWNETCONF, |
| 684 | 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 | rcu_read_unlock(); |
| 687 | goto done; |
| 688 | } |
Nicolas Dichtel | 63998ac | 2013-03-22 06:28:43 +0000 | [diff] [blame] | 689 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
Nicolas Dichtel | 7a67420 | 2013-03-05 23:42:06 +0000 | [diff] [blame] | 690 | cont: |
| 691 | idx++; |
| 692 | } |
| 693 | rcu_read_unlock(); |
| 694 | } |
| 695 | if (h == NETDEV_HASHENTRIES) { |
| 696 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL, |
| 697 | net->ipv6.devconf_all, |
| 698 | NETLINK_CB(cb->skb).portid, |
| 699 | cb->nlh->nlmsg_seq, |
| 700 | RTM_NEWNETCONF, NLM_F_MULTI, |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 701 | NETCONFA_ALL) < 0) |
Nicolas Dichtel | 7a67420 | 2013-03-05 23:42:06 +0000 | [diff] [blame] | 702 | goto done; |
| 703 | else |
| 704 | h++; |
| 705 | } |
| 706 | if (h == NETDEV_HASHENTRIES + 1) { |
| 707 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT, |
| 708 | net->ipv6.devconf_dflt, |
| 709 | NETLINK_CB(cb->skb).portid, |
| 710 | cb->nlh->nlmsg_seq, |
| 711 | RTM_NEWNETCONF, NLM_F_MULTI, |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 712 | NETCONFA_ALL) < 0) |
Nicolas Dichtel | 7a67420 | 2013-03-05 23:42:06 +0000 | [diff] [blame] | 713 | goto done; |
| 714 | else |
| 715 | h++; |
| 716 | } |
| 717 | done: |
| 718 | cb->args[0] = h; |
| 719 | cb->args[1] = idx; |
| 720 | |
| 721 | return skb->len; |
| 722 | } |
| 723 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | #ifdef CONFIG_SYSCTL |
| 725 | static void dev_forward_change(struct inet6_dev *idev) |
| 726 | { |
| 727 | struct net_device *dev; |
| 728 | struct inet6_ifaddr *ifa; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | |
| 730 | if (!idev) |
| 731 | return; |
| 732 | dev = idev->dev; |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 733 | if (idev->cnf.forwarding) |
| 734 | dev_disable_lro(dev); |
Amerigo Wang | 1a94083 | 2012-10-28 17:43:53 +0000 | [diff] [blame] | 735 | if (dev->flags & IFF_MULTICAST) { |
Hannes Frederic Sowa | 2c5e893 | 2013-02-10 03:50:18 +0000 | [diff] [blame] | 736 | if (idev->cnf.forwarding) { |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 737 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
Hannes Frederic Sowa | 2c5e893 | 2013-02-10 03:50:18 +0000 | [diff] [blame] | 738 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allrouters); |
| 739 | ipv6_dev_mc_inc(dev, &in6addr_sitelocal_allrouters); |
| 740 | } else { |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 741 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
Hannes Frederic Sowa | 2c5e893 | 2013-02-10 03:50:18 +0000 | [diff] [blame] | 742 | ipv6_dev_mc_dec(dev, &in6addr_interfacelocal_allrouters); |
| 743 | ipv6_dev_mc_dec(dev, &in6addr_sitelocal_allrouters); |
| 744 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | } |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 746 | |
| 747 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
Michal Wrobel | 2c12a74 | 2007-02-26 15:36:10 -0800 | [diff] [blame] | 748 | if (ifa->flags&IFA_F_TENTATIVE) |
| 749 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | if (idev->cnf.forwarding) |
| 751 | addrconf_join_anycast(ifa); |
| 752 | else |
| 753 | addrconf_leave_anycast(ifa); |
| 754 | } |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 755 | inet6_netconf_notify_devconf(dev_net(dev), NETCONFA_FORWARDING, |
| 756 | dev->ifindex, &idev->cnf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | } |
| 758 | |
| 759 | |
Pavel Emelyanov | e186932 | 2008-01-10 17:43:50 -0800 | [diff] [blame] | 760 | static void addrconf_forward_change(struct net *net, __s32 newf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | { |
| 762 | struct net_device *dev; |
| 763 | struct inet6_dev *idev; |
| 764 | |
Ben Hutchings | 4acd494 | 2012-08-14 08:54:51 +0000 | [diff] [blame] | 765 | for_each_netdev(net, dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | idev = __in6_dev_get(dev); |
| 767 | if (idev) { |
Pavel Emelyanov | e186932 | 2008-01-10 17:43:50 -0800 | [diff] [blame] | 768 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
| 769 | idev->cnf.forwarding = newf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | if (changed) |
| 771 | dev_forward_change(idev); |
| 772 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | } |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 775 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 776 | 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] | 777 | { |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 778 | struct net *net; |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 779 | int old; |
| 780 | |
| 781 | if (!rtnl_trylock()) |
| 782 | return restart_syscall(); |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 783 | |
| 784 | net = (struct net *)table->extra2; |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 785 | old = *p; |
| 786 | *p = newf; |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 787 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 788 | if (p == &net->ipv6.devconf_dflt->forwarding) { |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 789 | if ((!newf) ^ (!old)) |
| 790 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, |
| 791 | NETCONFA_IFINDEX_DEFAULT, |
| 792 | net->ipv6.devconf_dflt); |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 793 | rtnl_unlock(); |
| 794 | return 0; |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 795 | } |
Stephen Hemminger | b325fdd | 2009-02-26 06:55:31 +0000 | [diff] [blame] | 796 | |
Pavel Emelyanov | e186932 | 2008-01-10 17:43:50 -0800 | [diff] [blame] | 797 | if (p == &net->ipv6.devconf_all->forwarding) { |
Nicolas Dichtel | d26c638 | 2016-08-30 10:09:21 +0200 | [diff] [blame] | 798 | int old_dflt = net->ipv6.devconf_dflt->forwarding; |
| 799 | |
Pavel Emelyanov | e186932 | 2008-01-10 17:43:50 -0800 | [diff] [blame] | 800 | net->ipv6.devconf_dflt->forwarding = newf; |
Nicolas Dichtel | d26c638 | 2016-08-30 10:09:21 +0200 | [diff] [blame] | 801 | if ((!newf) ^ (!old_dflt)) |
| 802 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, |
| 803 | NETCONFA_IFINDEX_DEFAULT, |
| 804 | net->ipv6.devconf_dflt); |
| 805 | |
Pavel Emelyanov | e186932 | 2008-01-10 17:43:50 -0800 | [diff] [blame] | 806 | addrconf_forward_change(net, newf); |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 807 | if ((!newf) ^ (!old)) |
| 808 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, |
| 809 | NETCONFA_IFINDEX_ALL, |
| 810 | net->ipv6.devconf_all); |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 811 | } else if ((!newf) ^ (!old)) |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 812 | dev_forward_change((struct inet6_dev *)table->extra1); |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 813 | rtnl_unlock(); |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 814 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 815 | if (newf) |
Daniel Lezcano | 7b4da53 | 2008-03-04 13:47:14 -0800 | [diff] [blame] | 816 | rt6_purge_dflt_routers(net); |
Stephen Hemminger | b325fdd | 2009-02-26 06:55:31 +0000 | [diff] [blame] | 817 | return 1; |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 818 | } |
Andy Gospodarek | 35103d1 | 2015-08-13 10:39:01 -0400 | [diff] [blame] | 819 | |
| 820 | static void addrconf_linkdown_change(struct net *net, __s32 newf) |
| 821 | { |
| 822 | struct net_device *dev; |
| 823 | struct inet6_dev *idev; |
| 824 | |
| 825 | for_each_netdev(net, dev) { |
| 826 | idev = __in6_dev_get(dev); |
| 827 | if (idev) { |
| 828 | int changed = (!idev->cnf.ignore_routes_with_linkdown) ^ (!newf); |
| 829 | |
| 830 | idev->cnf.ignore_routes_with_linkdown = newf; |
| 831 | if (changed) |
| 832 | inet6_netconf_notify_devconf(dev_net(dev), |
| 833 | NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, |
| 834 | dev->ifindex, |
| 835 | &idev->cnf); |
| 836 | } |
| 837 | } |
| 838 | } |
| 839 | |
| 840 | static int addrconf_fixup_linkdown(struct ctl_table *table, int *p, int newf) |
| 841 | { |
| 842 | struct net *net; |
| 843 | int old; |
| 844 | |
| 845 | if (!rtnl_trylock()) |
| 846 | return restart_syscall(); |
| 847 | |
| 848 | net = (struct net *)table->extra2; |
| 849 | old = *p; |
| 850 | *p = newf; |
| 851 | |
| 852 | if (p == &net->ipv6.devconf_dflt->ignore_routes_with_linkdown) { |
| 853 | if ((!newf) ^ (!old)) |
| 854 | inet6_netconf_notify_devconf(net, |
| 855 | NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, |
| 856 | NETCONFA_IFINDEX_DEFAULT, |
| 857 | net->ipv6.devconf_dflt); |
| 858 | rtnl_unlock(); |
| 859 | return 0; |
| 860 | } |
| 861 | |
| 862 | if (p == &net->ipv6.devconf_all->ignore_routes_with_linkdown) { |
| 863 | net->ipv6.devconf_dflt->ignore_routes_with_linkdown = newf; |
| 864 | addrconf_linkdown_change(net, newf); |
| 865 | if ((!newf) ^ (!old)) |
| 866 | inet6_netconf_notify_devconf(net, |
| 867 | NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, |
| 868 | NETCONFA_IFINDEX_ALL, |
| 869 | net->ipv6.devconf_all); |
| 870 | } |
| 871 | rtnl_unlock(); |
| 872 | |
| 873 | return 1; |
| 874 | } |
| 875 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | #endif |
| 877 | |
stephen hemminger | 5c578aed | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 878 | /* Nobody refers to this ifaddr, destroy it */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) |
| 880 | { |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 881 | WARN_ON(!hlist_unhashed(&ifp->addr_lst)); |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 882 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | #ifdef NET_REFCNT_DEBUG |
Joe Perches | 91df42b | 2012-05-15 14:11:54 +0000 | [diff] [blame] | 884 | pr_debug("%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | #endif |
| 886 | |
| 887 | in6_dev_put(ifp->idev); |
| 888 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 889 | if (cancel_delayed_work(&ifp->dad_work)) |
| 890 | pr_notice("delayed DAD work was pending while freeing ifa=%p\n", |
| 891 | ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | |
Herbert Xu | e9d3e08 | 2010-05-18 15:36:06 -0700 | [diff] [blame] | 893 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 894 | pr_warn("Freeing alive inet6 address %p\n", ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | return; |
| 896 | } |
Amerigo Wang | 94e187c | 2012-10-29 00:13:19 +0000 | [diff] [blame] | 897 | ip6_rt_put(ifp->rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | |
Lai Jiangshan | e578598 | 2011-03-15 18:00:14 +0800 | [diff] [blame] | 899 | kfree_rcu(ifp, rcu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | } |
| 901 | |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 902 | static void |
| 903 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) |
| 904 | { |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 905 | struct list_head *p; |
YOSHIFUJI Hideaki | 8a6ce0c | 2006-07-11 13:05:30 -0700 | [diff] [blame] | 906 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 907 | |
| 908 | /* |
| 909 | * Each device address list is sorted in order of scope - |
| 910 | * global before linklocal. |
| 911 | */ |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 912 | list_for_each(p, &idev->addr_list) { |
| 913 | struct inet6_ifaddr *ifa |
| 914 | = list_entry(p, struct inet6_ifaddr, if_list); |
YOSHIFUJI Hideaki | 8a6ce0c | 2006-07-11 13:05:30 -0700 | [diff] [blame] | 915 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 916 | break; |
| 917 | } |
| 918 | |
David S. Miller | b54c9b9 | 2010-03-25 21:25:30 -0700 | [diff] [blame] | 919 | list_add_tail(&ifp->if_list, p); |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 920 | } |
| 921 | |
Eric Dumazet | ddbe503 | 2012-07-18 08:11:12 +0000 | [diff] [blame] | 922 | static u32 inet6_addr_hash(const struct in6_addr *addr) |
YOSHIFUJI Hideaki | 3eb84f4 | 2008-04-10 15:42:08 +0900 | [diff] [blame] | 923 | { |
Eric Dumazet | ddbe503 | 2012-07-18 08:11:12 +0000 | [diff] [blame] | 924 | return hash_32(ipv6_addr_hash(addr), IN6_ADDR_HSIZE_SHIFT); |
YOSHIFUJI Hideaki | 3eb84f4 | 2008-04-10 15:42:08 +0900 | [diff] [blame] | 925 | } |
| 926 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | /* On success it returns ifp with increased reference count */ |
| 928 | |
| 929 | static struct inet6_ifaddr * |
Jiri Pirko | 3f8f529 | 2013-08-01 10:41:27 +0200 | [diff] [blame] | 930 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
| 931 | const struct in6_addr *peer_addr, int pfxlen, |
Jiri Benc | 8a226b2 | 2013-08-01 10:41:28 +0200 | [diff] [blame] | 932 | int scope, u32 flags, u32 valid_lft, u32 prefered_lft) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | { |
| 934 | struct inet6_ifaddr *ifa = NULL; |
| 935 | struct rt6_info *rt; |
stephen hemminger | 3a88a81 | 2010-03-17 20:31:12 +0000 | [diff] [blame] | 936 | unsigned int hash; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | int err = 0; |
YOSHIFUJI Hideaki | d68b827 | 2008-06-25 16:26:47 +0900 | [diff] [blame] | 938 | int addr_type = ipv6_addr_type(addr); |
| 939 | |
| 940 | if (addr_type == IPV6_ADDR_ANY || |
| 941 | addr_type & IPV6_ADDR_MULTICAST || |
| 942 | (!(idev->dev->flags & IFF_LOOPBACK) && |
| 943 | addr_type & IPV6_ADDR_LOOPBACK)) |
| 944 | return ERR_PTR(-EADDRNOTAVAIL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 946 | rcu_read_lock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | if (idev->dead) { |
| 948 | err = -ENODEV; /*XXX*/ |
| 949 | goto out2; |
| 950 | } |
| 951 | |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 952 | if (idev->cnf.disable_ipv6) { |
Brian Haley | 9bdd8d4 | 2009-03-18 18:22:48 -0700 | [diff] [blame] | 953 | err = -EACCES; |
| 954 | goto out2; |
| 955 | } |
| 956 | |
stephen hemminger | 5c578aed | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 957 | spin_lock(&addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | |
| 959 | /* Ignore adding duplicate addresses on an interface */ |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 960 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
dingtianhong | ba3542e | 2013-08-17 10:27:04 +0800 | [diff] [blame] | 961 | ADBG("ipv6_add_addr: already assigned\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | err = -EEXIST; |
| 963 | goto out; |
| 964 | } |
| 965 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 966 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 968 | if (!ifa) { |
dingtianhong | ba3542e | 2013-08-17 10:27:04 +0800 | [diff] [blame] | 969 | ADBG("ipv6_add_addr: malloc failed\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | err = -ENOBUFS; |
| 971 | goto out; |
| 972 | } |
| 973 | |
David S. Miller | 8f03151 | 2011-12-06 16:48:14 -0500 | [diff] [blame] | 974 | rt = addrconf_dst_alloc(idev, addr, false); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | if (IS_ERR(rt)) { |
| 976 | err = PTR_ERR(rt); |
| 977 | goto out; |
| 978 | } |
| 979 | |
Jiri Pirko | bba2489 | 2013-12-07 19:26:57 +0100 | [diff] [blame] | 980 | neigh_parms_data_state_setall(idev->nd_parms); |
| 981 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 982 | ifa->addr = *addr; |
Jiri Pirko | 3f8f529 | 2013-08-01 10:41:27 +0200 | [diff] [blame] | 983 | if (peer_addr) |
| 984 | ifa->peer_addr = *peer_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | |
| 986 | spin_lock_init(&ifa->lock); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 987 | INIT_DELAYED_WORK(&ifa->dad_work, addrconf_dad_work); |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 988 | INIT_HLIST_NODE(&ifa->addr_lst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | ifa->scope = scope; |
| 990 | ifa->prefix_len = pfxlen; |
| 991 | ifa->flags = flags | IFA_F_TENTATIVE; |
Jiri Benc | 8a226b2 | 2013-08-01 10:41:28 +0200 | [diff] [blame] | 992 | ifa->valid_lft = valid_lft; |
| 993 | ifa->prefered_lft = prefered_lft; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | ifa->cstamp = ifa->tstamp = jiffies; |
Daniel Borkmann | 617fe29 | 2013-04-09 03:47:16 +0000 | [diff] [blame] | 995 | ifa->tokenized = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | |
Keir Fraser | 57f5f54 | 2006-08-29 02:43:49 -0700 | [diff] [blame] | 997 | ifa->rt = rt; |
| 998 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | ifa->idev = idev; |
| 1000 | in6_dev_hold(idev); |
| 1001 | /* For caller */ |
| 1002 | in6_ifa_hold(ifa); |
| 1003 | |
| 1004 | /* Add to big hash table */ |
Eric Dumazet | ddbe503 | 2012-07-18 08:11:12 +0000 | [diff] [blame] | 1005 | hash = inet6_addr_hash(addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | |
stephen hemminger | 5c578aed | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 1007 | hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]); |
stephen hemminger | 5c578aed | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 1008 | spin_unlock(&addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | |
| 1010 | write_lock(&idev->lock); |
| 1011 | /* Add to inet6_dev unicast addr list. */ |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 1012 | ipv6_link_dev_addr(idev, ifa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | if (ifa->flags&IFA_F_TEMPORARY) { |
stephen hemminger | 372e6c8 | 2010-03-17 20:31:09 +0000 | [diff] [blame] | 1015 | list_add(&ifa->tmp_list, &idev->tempaddr_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | in6_ifa_hold(ifa); |
| 1017 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | in6_ifa_hold(ifa); |
| 1020 | write_unlock(&idev->lock); |
| 1021 | out2: |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1022 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | |
YOSHIFUJI Hideaki | fd92833 | 2005-04-19 22:27:09 -0700 | [diff] [blame] | 1024 | if (likely(err == 0)) |
Cong Wang | f88c91d | 2013-04-14 23:18:43 +0800 | [diff] [blame] | 1025 | inet6addr_notifier_call_chain(NETDEV_UP, ifa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | else { |
| 1027 | kfree(ifa); |
| 1028 | ifa = ERR_PTR(err); |
| 1029 | } |
| 1030 | |
| 1031 | return ifa; |
| 1032 | out: |
stephen hemminger | 5c578aed | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 1033 | spin_unlock(&addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | goto out2; |
| 1035 | } |
| 1036 | |
Thomas Haller | 5b84efe | 2014-01-15 15:36:59 +0100 | [diff] [blame] | 1037 | enum cleanup_prefix_rt_t { |
| 1038 | CLEANUP_PREFIX_RT_NOP, /* no cleanup action for prefix route */ |
| 1039 | CLEANUP_PREFIX_RT_DEL, /* delete the prefix route */ |
| 1040 | CLEANUP_PREFIX_RT_EXPIRE, /* update the lifetime of the prefix route */ |
| 1041 | }; |
| 1042 | |
| 1043 | /* |
| 1044 | * Check, whether the prefix for ifp would still need a prefix route |
| 1045 | * after deleting ifp. The function returns one of the CLEANUP_PREFIX_RT_* |
| 1046 | * constants. |
| 1047 | * |
| 1048 | * 1) we don't purge prefix if address was not permanent. |
| 1049 | * prefix is managed by its own lifetime. |
| 1050 | * 2) we also don't purge, if the address was IFA_F_NOPREFIXROUTE. |
| 1051 | * 3) if there are no addresses, delete prefix. |
| 1052 | * 4) if there are still other permanent address(es), |
| 1053 | * corresponding prefix is still permanent. |
| 1054 | * 5) if there are still other addresses with IFA_F_NOPREFIXROUTE, |
| 1055 | * don't purge the prefix, assume user space is managing it. |
| 1056 | * 6) otherwise, update prefix lifetime to the |
| 1057 | * longest valid lifetime among the corresponding |
| 1058 | * addresses on the device. |
| 1059 | * Note: subsequent RA will update lifetime. |
| 1060 | **/ |
| 1061 | static enum cleanup_prefix_rt_t |
| 1062 | check_cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long *expires) |
| 1063 | { |
| 1064 | struct inet6_ifaddr *ifa; |
| 1065 | struct inet6_dev *idev = ifp->idev; |
| 1066 | unsigned long lifetime; |
| 1067 | enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_DEL; |
| 1068 | |
| 1069 | *expires = jiffies; |
| 1070 | |
| 1071 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
| 1072 | if (ifa == ifp) |
| 1073 | continue; |
| 1074 | if (!ipv6_prefix_equal(&ifa->addr, &ifp->addr, |
| 1075 | ifp->prefix_len)) |
| 1076 | continue; |
| 1077 | if (ifa->flags & (IFA_F_PERMANENT | IFA_F_NOPREFIXROUTE)) |
| 1078 | return CLEANUP_PREFIX_RT_NOP; |
| 1079 | |
| 1080 | action = CLEANUP_PREFIX_RT_EXPIRE; |
| 1081 | |
| 1082 | spin_lock(&ifa->lock); |
| 1083 | |
| 1084 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); |
| 1085 | /* |
| 1086 | * Note: Because this address is |
| 1087 | * not permanent, lifetime < |
| 1088 | * LONG_MAX / HZ here. |
| 1089 | */ |
| 1090 | if (time_before(*expires, ifa->tstamp + lifetime * HZ)) |
| 1091 | *expires = ifa->tstamp + lifetime * HZ; |
| 1092 | spin_unlock(&ifa->lock); |
| 1093 | } |
| 1094 | |
| 1095 | return action; |
| 1096 | } |
| 1097 | |
| 1098 | static void |
| 1099 | cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long expires, bool del_rt) |
| 1100 | { |
| 1101 | struct rt6_info *rt; |
| 1102 | |
| 1103 | rt = addrconf_get_prefix_route(&ifp->addr, |
| 1104 | ifp->prefix_len, |
| 1105 | ifp->idev->dev, |
| 1106 | 0, RTF_GATEWAY | RTF_DEFAULT); |
| 1107 | if (rt) { |
| 1108 | if (del_rt) |
| 1109 | ip6_del_rt(rt); |
| 1110 | else { |
| 1111 | if (!(rt->rt6i_flags & RTF_EXPIRES)) |
| 1112 | rt6_set_expires(rt, expires); |
| 1113 | ip6_rt_put(rt); |
| 1114 | } |
| 1115 | } |
| 1116 | } |
| 1117 | |
| 1118 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | /* This function wants to get referenced ifp and releases it before return */ |
| 1120 | |
| 1121 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) |
| 1122 | { |
Herbert Xu | 4c5ff6a | 2010-05-18 15:54:18 -0700 | [diff] [blame] | 1123 | int state; |
Thomas Haller | 5b84efe | 2014-01-15 15:36:59 +0100 | [diff] [blame] | 1124 | enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_NOP; |
| 1125 | unsigned long expires; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 1127 | ASSERT_RTNL(); |
| 1128 | |
Hannes Frederic Sowa | 8e8e676 | 2015-03-23 23:36:03 +0100 | [diff] [blame] | 1129 | spin_lock_bh(&ifp->lock); |
Herbert Xu | 4c5ff6a | 2010-05-18 15:54:18 -0700 | [diff] [blame] | 1130 | state = ifp->state; |
Herbert Xu | e9d3e08 | 2010-05-18 15:36:06 -0700 | [diff] [blame] | 1131 | ifp->state = INET6_IFADDR_STATE_DEAD; |
Hannes Frederic Sowa | 8e8e676 | 2015-03-23 23:36:03 +0100 | [diff] [blame] | 1132 | spin_unlock_bh(&ifp->lock); |
Herbert Xu | 4c5ff6a | 2010-05-18 15:54:18 -0700 | [diff] [blame] | 1133 | |
| 1134 | if (state == INET6_IFADDR_STATE_DEAD) |
| 1135 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | |
stephen hemminger | 5c578aed | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 1137 | spin_lock_bh(&addrconf_hash_lock); |
| 1138 | hlist_del_init_rcu(&ifp->addr_lst); |
stephen hemminger | 5c578aed | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 1139 | spin_unlock_bh(&addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | |
Thomas Haller | 5b84efe | 2014-01-15 15:36:59 +0100 | [diff] [blame] | 1141 | write_lock_bh(&ifp->idev->lock); |
David S. Miller | 5d9efa7 | 2013-10-28 20:07:50 -0400 | [diff] [blame] | 1142 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1143 | if (ifp->flags&IFA_F_TEMPORARY) { |
stephen hemminger | 372e6c8 | 2010-03-17 20:31:09 +0000 | [diff] [blame] | 1144 | list_del(&ifp->tmp_list); |
| 1145 | if (ifp->ifpub) { |
| 1146 | in6_ifa_put(ifp->ifpub); |
| 1147 | ifp->ifpub = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | } |
stephen hemminger | 372e6c8 | 2010-03-17 20:31:09 +0000 | [diff] [blame] | 1149 | __in6_ifa_put(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1150 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | |
Thomas Haller | 5b84efe | 2014-01-15 15:36:59 +0100 | [diff] [blame] | 1152 | if (ifp->flags & IFA_F_PERMANENT && !(ifp->flags & IFA_F_NOPREFIXROUTE)) |
| 1153 | action = check_cleanup_prefix_route(ifp, &expires); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 1154 | |
Thomas Haller | 5b84efe | 2014-01-15 15:36:59 +0100 | [diff] [blame] | 1155 | list_del_init(&ifp->if_list); |
| 1156 | __in6_ifa_put(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | |
Thomas Haller | 5b84efe | 2014-01-15 15:36:59 +0100 | [diff] [blame] | 1158 | write_unlock_bh(&ifp->idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 1160 | addrconf_del_dad_work(ifp); |
Andrey Vagin | b223856 | 2008-07-08 15:13:31 -0700 | [diff] [blame] | 1161 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
| 1163 | |
Cong Wang | f88c91d | 2013-04-14 23:18:43 +0800 | [diff] [blame] | 1164 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | |
Thomas Haller | 5b84efe | 2014-01-15 15:36:59 +0100 | [diff] [blame] | 1166 | if (action != CLEANUP_PREFIX_RT_NOP) { |
| 1167 | cleanup_prefix_route(ifp, expires, |
| 1168 | action == CLEANUP_PREFIX_RT_DEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | } |
| 1170 | |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 1171 | /* clean up prefsrc entries */ |
| 1172 | rt6_remove_prefsrc(ifp); |
Herbert Xu | 4c5ff6a | 2010-05-18 15:54:18 -0700 | [diff] [blame] | 1173 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | in6_ifa_put(ifp); |
| 1175 | } |
| 1176 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) |
| 1178 | { |
| 1179 | struct inet6_dev *idev = ifp->idev; |
| 1180 | struct in6_addr addr, *tmpaddr; |
Lorenzo Colitti | 76f793e | 2011-07-26 13:50:49 +0000 | [diff] [blame] | 1181 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age; |
Benoit Boissinot | eac55bf | 2008-04-02 00:01:35 -0700 | [diff] [blame] | 1182 | unsigned long regen_advance; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1183 | int tmp_plen; |
| 1184 | int ret = 0; |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1185 | u32 addr_flags; |
Lorenzo Colitti | 76f793e | 2011-07-26 13:50:49 +0000 | [diff] [blame] | 1186 | unsigned long now = jiffies; |
Jiri Bohac | 76506a9 | 2016-10-13 18:52:15 +0200 | [diff] [blame] | 1187 | long max_desync_factor; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 1189 | write_lock_bh(&idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1190 | if (ift) { |
| 1191 | spin_lock_bh(&ift->lock); |
| 1192 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); |
| 1193 | spin_unlock_bh(&ift->lock); |
| 1194 | tmpaddr = &addr; |
| 1195 | } else { |
| 1196 | tmpaddr = NULL; |
| 1197 | } |
| 1198 | retry: |
| 1199 | in6_dev_hold(idev); |
| 1200 | if (idev->cnf.use_tempaddr <= 0) { |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 1201 | write_unlock_bh(&idev->lock); |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 1202 | pr_info("%s: use_tempaddr is disabled\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | in6_dev_put(idev); |
| 1204 | ret = -1; |
| 1205 | goto out; |
| 1206 | } |
| 1207 | spin_lock_bh(&ifp->lock); |
| 1208 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { |
| 1209 | idev->cnf.use_tempaddr = -1; /*XXX*/ |
| 1210 | spin_unlock_bh(&ifp->lock); |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 1211 | write_unlock_bh(&idev->lock); |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 1212 | pr_warn("%s: regeneration time exceeded - disabled temporary address support\n", |
| 1213 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1214 | in6_dev_put(idev); |
| 1215 | ret = -1; |
| 1216 | goto out; |
| 1217 | } |
| 1218 | in6_ifa_hold(ifp); |
| 1219 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); |
Jiri Bohac | 9d6280d | 2016-10-13 18:50:02 +0200 | [diff] [blame] | 1220 | ipv6_try_regen_rndid(idev, tmpaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1221 | memcpy(&addr.s6_addr[8], idev->rndid, 8); |
Lorenzo Colitti | 76f793e | 2011-07-26 13:50:49 +0000 | [diff] [blame] | 1222 | age = (now - ifp->tstamp) / HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1223 | |
Benoit Boissinot | eac55bf | 2008-04-02 00:01:35 -0700 | [diff] [blame] | 1224 | regen_advance = idev->cnf.regen_max_retry * |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 1225 | idev->cnf.dad_transmits * |
| 1226 | NEIGH_VAR(idev->nd_parms, RETRANS_TIME) / HZ; |
Jiri Bohac | 76506a9 | 2016-10-13 18:52:15 +0200 | [diff] [blame] | 1227 | |
| 1228 | /* recalculate max_desync_factor each time and update |
| 1229 | * idev->desync_factor if it's larger |
| 1230 | */ |
| 1231 | max_desync_factor = min_t(__u32, |
| 1232 | idev->cnf.max_desync_factor, |
| 1233 | idev->cnf.temp_prefered_lft - regen_advance); |
| 1234 | |
| 1235 | if (unlikely(idev->desync_factor > max_desync_factor)) { |
| 1236 | if (max_desync_factor > 0) { |
| 1237 | get_random_bytes(&idev->desync_factor, |
| 1238 | sizeof(idev->desync_factor)); |
| 1239 | idev->desync_factor %= max_desync_factor; |
| 1240 | } else { |
| 1241 | idev->desync_factor = 0; |
| 1242 | } |
| 1243 | } |
| 1244 | |
| 1245 | tmp_valid_lft = min_t(__u32, |
| 1246 | ifp->valid_lft, |
| 1247 | idev->cnf.temp_valid_lft + age); |
| 1248 | tmp_prefered_lft = idev->cnf.temp_prefered_lft + age - |
| 1249 | idev->desync_factor; |
| 1250 | /* guard against underflow in case of concurrent updates to cnf */ |
| 1251 | if (unlikely(tmp_prefered_lft < 0)) |
| 1252 | tmp_prefered_lft = 0; |
| 1253 | tmp_prefered_lft = min_t(__u32, ifp->prefered_lft, tmp_prefered_lft); |
| 1254 | tmp_plen = ifp->prefix_len; |
| 1255 | tmp_tstamp = ifp->tstamp; |
| 1256 | spin_unlock_bh(&ifp->lock); |
| 1257 | |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 1258 | write_unlock_bh(&idev->lock); |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1259 | |
Benoit Boissinot | eac55bf | 2008-04-02 00:01:35 -0700 | [diff] [blame] | 1260 | /* A temporary address is created only if this calculated Preferred |
| 1261 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, |
| 1262 | * an implementation must not create a temporary address with a zero |
| 1263 | * Preferred Lifetime. |
Heiner Kallweit | ecab670 | 2014-03-12 22:13:19 +0100 | [diff] [blame] | 1264 | * Use age calculation as in addrconf_verify to avoid unnecessary |
| 1265 | * temporary addresses being generated. |
Benoit Boissinot | eac55bf | 2008-04-02 00:01:35 -0700 | [diff] [blame] | 1266 | */ |
Heiner Kallweit | ecab670 | 2014-03-12 22:13:19 +0100 | [diff] [blame] | 1267 | age = (now - tmp_tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; |
| 1268 | if (tmp_prefered_lft <= regen_advance + age) { |
Benoit Boissinot | eac55bf | 2008-04-02 00:01:35 -0700 | [diff] [blame] | 1269 | in6_ifa_put(ifp); |
| 1270 | in6_dev_put(idev); |
| 1271 | ret = -1; |
| 1272 | goto out; |
| 1273 | } |
| 1274 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1275 | addr_flags = IFA_F_TEMPORARY; |
| 1276 | /* set in addrconf_prefix_rcv() */ |
| 1277 | if (ifp->flags & IFA_F_OPTIMISTIC) |
| 1278 | addr_flags |= IFA_F_OPTIMISTIC; |
| 1279 | |
Hannes Frederic Sowa | 4b08a8f | 2013-08-16 13:02:27 +0200 | [diff] [blame] | 1280 | ift = ipv6_add_addr(idev, &addr, NULL, tmp_plen, |
| 1281 | ipv6_addr_scope(&addr), addr_flags, |
| 1282 | tmp_valid_lft, tmp_prefered_lft); |
| 1283 | if (IS_ERR(ift)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | in6_ifa_put(ifp); |
| 1285 | in6_dev_put(idev); |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 1286 | pr_info("%s: retry temporary address regeneration\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | tmpaddr = &addr; |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 1288 | write_lock_bh(&idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | goto retry; |
| 1290 | } |
| 1291 | |
| 1292 | spin_lock_bh(&ift->lock); |
| 1293 | ift->ifpub = ifp; |
Lorenzo Colitti | 76f793e | 2011-07-26 13:50:49 +0000 | [diff] [blame] | 1294 | ift->cstamp = now; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1295 | ift->tstamp = tmp_tstamp; |
| 1296 | spin_unlock_bh(&ift->lock); |
| 1297 | |
David S. Miller | cf22f9a | 2012-04-14 21:37:40 -0400 | [diff] [blame] | 1298 | addrconf_dad_start(ift); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | in6_ifa_put(ift); |
| 1300 | in6_dev_put(idev); |
| 1301 | out: |
| 1302 | return ret; |
| 1303 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | |
| 1305 | /* |
YOSHIFUJI Hideaki | 072047e4 | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1306 | * Choose an appropriate source address (RFC3484) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | */ |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1308 | enum { |
| 1309 | IPV6_SADDR_RULE_INIT = 0, |
| 1310 | IPV6_SADDR_RULE_LOCAL, |
| 1311 | IPV6_SADDR_RULE_SCOPE, |
| 1312 | IPV6_SADDR_RULE_PREFERRED, |
| 1313 | #ifdef CONFIG_IPV6_MIP6 |
| 1314 | IPV6_SADDR_RULE_HOA, |
| 1315 | #endif |
| 1316 | IPV6_SADDR_RULE_OIF, |
| 1317 | IPV6_SADDR_RULE_LABEL, |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1318 | IPV6_SADDR_RULE_PRIVACY, |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1319 | IPV6_SADDR_RULE_ORCHID, |
| 1320 | IPV6_SADDR_RULE_PREFIX, |
Erik Kline | 7fd2561 | 2014-10-28 18:11:14 +0900 | [diff] [blame] | 1321 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 1322 | IPV6_SADDR_RULE_NOT_OPTIMISTIC, |
| 1323 | #endif |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1324 | IPV6_SADDR_RULE_MAX |
YOSHIFUJI Hideaki | 072047e4 | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1325 | }; |
| 1326 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1327 | struct ipv6_saddr_score { |
| 1328 | int rule; |
| 1329 | int addr_type; |
| 1330 | struct inet6_ifaddr *ifa; |
| 1331 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); |
| 1332 | int scopedist; |
| 1333 | int matchlen; |
| 1334 | }; |
| 1335 | |
| 1336 | struct ipv6_saddr_dst { |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 1337 | const struct in6_addr *addr; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1338 | int ifindex; |
| 1339 | int scope; |
| 1340 | int label; |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1341 | unsigned int prefs; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1342 | }; |
YOSHIFUJI Hideaki | 072047e4 | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1343 | |
Dave Jones | b6f99a2 | 2007-03-22 12:27:49 -0700 | [diff] [blame] | 1344 | static inline int ipv6_saddr_preferred(int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | { |
Ulrich Weber | 45bb0060 | 2010-02-25 23:28:58 +0000 | [diff] [blame] | 1346 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK)) |
YOSHIFUJI Hideaki | 072047e4 | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1347 | return 1; |
| 1348 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1349 | } |
| 1350 | |
Erik Kline | 7fd2561 | 2014-10-28 18:11:14 +0900 | [diff] [blame] | 1351 | static inline bool ipv6_use_optimistic_addr(struct inet6_dev *idev) |
| 1352 | { |
| 1353 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 1354 | return idev && idev->cnf.optimistic_dad && idev->cnf.use_optimistic; |
| 1355 | #else |
| 1356 | return false; |
| 1357 | #endif |
| 1358 | } |
| 1359 | |
Benjamin Thery | 3de2325 | 2008-05-28 14:51:24 +0200 | [diff] [blame] | 1360 | static int ipv6_get_saddr_eval(struct net *net, |
| 1361 | struct ipv6_saddr_score *score, |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1362 | struct ipv6_saddr_dst *dst, |
| 1363 | int i) |
| 1364 | { |
| 1365 | int ret; |
| 1366 | |
| 1367 | if (i <= score->rule) { |
| 1368 | switch (i) { |
| 1369 | case IPV6_SADDR_RULE_SCOPE: |
| 1370 | ret = score->scopedist; |
| 1371 | break; |
| 1372 | case IPV6_SADDR_RULE_PREFIX: |
| 1373 | ret = score->matchlen; |
| 1374 | break; |
| 1375 | default: |
| 1376 | ret = !!test_bit(i, score->scorebits); |
| 1377 | } |
| 1378 | goto out; |
| 1379 | } |
| 1380 | |
| 1381 | switch (i) { |
| 1382 | case IPV6_SADDR_RULE_INIT: |
| 1383 | /* Rule 0: remember if hiscore is not ready yet */ |
| 1384 | ret = !!score->ifa; |
| 1385 | break; |
| 1386 | case IPV6_SADDR_RULE_LOCAL: |
| 1387 | /* Rule 1: Prefer same address */ |
| 1388 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); |
| 1389 | break; |
| 1390 | case IPV6_SADDR_RULE_SCOPE: |
| 1391 | /* Rule 2: Prefer appropriate scope |
| 1392 | * |
| 1393 | * ret |
| 1394 | * ^ |
| 1395 | * -1 | d 15 |
| 1396 | * ---+--+-+---> scope |
| 1397 | * | |
| 1398 | * | d is scope of the destination. |
| 1399 | * B-d | \ |
| 1400 | * | \ <- smaller scope is better if |
stephen hemminger | db9c7c3 | 2014-01-12 11:26:32 -0800 | [diff] [blame] | 1401 | * B-15 | \ if scope is enough for destination. |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1402 | * | ret = B - scope (-1 <= scope >= d <= 15). |
| 1403 | * d-C-1 | / |
| 1404 | * |/ <- greater is better |
| 1405 | * -C / if scope is not enough for destination. |
| 1406 | * /| ret = scope - C (-1 <= d < scope <= 15). |
| 1407 | * |
| 1408 | * d - C - 1 < B -15 (for all -1 <= d <= 15). |
| 1409 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. |
| 1410 | * Assume B = 0 and we get C > 29. |
| 1411 | */ |
| 1412 | ret = __ipv6_addr_src_scope(score->addr_type); |
| 1413 | if (ret >= dst->scope) |
| 1414 | ret = -ret; |
| 1415 | else |
| 1416 | ret -= 128; /* 30 is enough */ |
| 1417 | score->scopedist = ret; |
| 1418 | break; |
| 1419 | case IPV6_SADDR_RULE_PREFERRED: |
Erik Kline | 7fd2561 | 2014-10-28 18:11:14 +0900 | [diff] [blame] | 1420 | { |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1421 | /* Rule 3: Avoid deprecated and optimistic addresses */ |
Erik Kline | 7fd2561 | 2014-10-28 18:11:14 +0900 | [diff] [blame] | 1422 | u8 avoid = IFA_F_DEPRECATED; |
| 1423 | |
| 1424 | if (!ipv6_use_optimistic_addr(score->ifa->idev)) |
| 1425 | avoid |= IFA_F_OPTIMISTIC; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1426 | ret = ipv6_saddr_preferred(score->addr_type) || |
Erik Kline | 7fd2561 | 2014-10-28 18:11:14 +0900 | [diff] [blame] | 1427 | !(score->ifa->flags & avoid); |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1428 | break; |
Erik Kline | 7fd2561 | 2014-10-28 18:11:14 +0900 | [diff] [blame] | 1429 | } |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1430 | #ifdef CONFIG_IPV6_MIP6 |
| 1431 | case IPV6_SADDR_RULE_HOA: |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1432 | { |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1433 | /* Rule 4: Prefer home address */ |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1434 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
| 1435 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1436 | break; |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1437 | } |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1438 | #endif |
| 1439 | case IPV6_SADDR_RULE_OIF: |
| 1440 | /* Rule 5: Prefer outgoing interface */ |
| 1441 | ret = (!dst->ifindex || |
| 1442 | dst->ifindex == score->ifa->idev->dev->ifindex); |
| 1443 | break; |
| 1444 | case IPV6_SADDR_RULE_LABEL: |
| 1445 | /* Rule 6: Prefer matching label */ |
Benjamin Thery | 3de2325 | 2008-05-28 14:51:24 +0200 | [diff] [blame] | 1446 | ret = ipv6_addr_label(net, |
| 1447 | &score->ifa->addr, score->addr_type, |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1448 | score->ifa->idev->dev->ifindex) == dst->label; |
| 1449 | break; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1450 | case IPV6_SADDR_RULE_PRIVACY: |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1451 | { |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1452 | /* Rule 7: Prefer public address |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1453 | * Note: prefer temporary address if use_tempaddr >= 2 |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1454 | */ |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1455 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
| 1456 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : |
| 1457 | score->ifa->idev->cnf.use_tempaddr >= 2; |
| 1458 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1459 | break; |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1460 | } |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1461 | case IPV6_SADDR_RULE_ORCHID: |
| 1462 | /* Rule 8-: Prefer ORCHID vs ORCHID or |
| 1463 | * non-ORCHID vs non-ORCHID |
| 1464 | */ |
| 1465 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ |
| 1466 | ipv6_addr_orchid(dst->addr)); |
| 1467 | break; |
| 1468 | case IPV6_SADDR_RULE_PREFIX: |
| 1469 | /* Rule 8: Use longest matching prefix */ |
YOSHIFUJI Hideaki / 吉藤英明 | 91b4b04 | 2012-09-10 18:41:07 +0000 | [diff] [blame] | 1470 | ret = ipv6_addr_diff(&score->ifa->addr, dst->addr); |
| 1471 | if (ret > score->ifa->prefix_len) |
| 1472 | ret = score->ifa->prefix_len; |
| 1473 | score->matchlen = ret; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1474 | break; |
Erik Kline | 7fd2561 | 2014-10-28 18:11:14 +0900 | [diff] [blame] | 1475 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 1476 | case IPV6_SADDR_RULE_NOT_OPTIMISTIC: |
| 1477 | /* Optimistic addresses still have lower precedence than other |
| 1478 | * preferred addresses. |
| 1479 | */ |
| 1480 | ret = !(score->ifa->flags & IFA_F_OPTIMISTIC); |
| 1481 | break; |
| 1482 | #endif |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1483 | default: |
| 1484 | ret = 0; |
| 1485 | } |
| 1486 | |
| 1487 | if (ret) |
| 1488 | __set_bit(i, score->scorebits); |
| 1489 | score->rule = i; |
| 1490 | out: |
| 1491 | return ret; |
| 1492 | } |
| 1493 | |
YOSHIFUJI Hideaki/吉藤英明 | c0b8da1 | 2015-07-13 23:28:10 +0900 | [diff] [blame] | 1494 | static int __ipv6_dev_get_saddr(struct net *net, |
| 1495 | struct ipv6_saddr_dst *dst, |
YOSHIFUJI Hideaki/吉藤英明 | c0b8da1 | 2015-07-13 23:28:10 +0900 | [diff] [blame] | 1496 | struct inet6_dev *idev, |
| 1497 | struct ipv6_saddr_score *scores, |
| 1498 | int hiscore_idx) |
YOSHIFUJI Hideaki/吉藤英明 | 9131f3d | 2015-07-10 16:58:31 +0900 | [diff] [blame] | 1499 | { |
YOSHIFUJI Hideaki/吉藤英明 | c0b8da1 | 2015-07-13 23:28:10 +0900 | [diff] [blame] | 1500 | 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] | 1501 | |
| 1502 | read_lock_bh(&idev->lock); |
| 1503 | list_for_each_entry(score->ifa, &idev->addr_list, if_list) { |
| 1504 | int i; |
| 1505 | |
| 1506 | /* |
| 1507 | * - Tentative Address (RFC2462 section 5.4) |
| 1508 | * - A tentative address is not considered |
| 1509 | * "assigned to an interface" in the traditional |
| 1510 | * sense, unless it is also flagged as optimistic. |
| 1511 | * - Candidate Source Address (section 4) |
| 1512 | * - In any case, anycast addresses, multicast |
| 1513 | * addresses, and the unspecified address MUST |
| 1514 | * NOT be included in a candidate set. |
| 1515 | */ |
| 1516 | if ((score->ifa->flags & IFA_F_TENTATIVE) && |
| 1517 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) |
| 1518 | continue; |
| 1519 | |
| 1520 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); |
| 1521 | |
| 1522 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || |
| 1523 | score->addr_type & IPV6_ADDR_MULTICAST)) { |
| 1524 | net_dbg_ratelimited("ADDRCONF: unspecified / multicast address assigned as unicast address on %s", |
| 1525 | idev->dev->name); |
| 1526 | continue; |
| 1527 | } |
| 1528 | |
| 1529 | score->rule = -1; |
| 1530 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); |
| 1531 | |
| 1532 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { |
| 1533 | int minihiscore, miniscore; |
| 1534 | |
| 1535 | minihiscore = ipv6_get_saddr_eval(net, hiscore, dst, i); |
| 1536 | miniscore = ipv6_get_saddr_eval(net, score, dst, i); |
| 1537 | |
| 1538 | if (minihiscore > miniscore) { |
| 1539 | if (i == IPV6_SADDR_RULE_SCOPE && |
| 1540 | score->scopedist > 0) { |
| 1541 | /* |
| 1542 | * special case: |
| 1543 | * each remaining entry |
| 1544 | * has too small (not enough) |
| 1545 | * scope, because ifa entries |
| 1546 | * are sorted by their scope |
| 1547 | * values. |
| 1548 | */ |
| 1549 | goto out; |
| 1550 | } |
| 1551 | break; |
| 1552 | } else if (minihiscore < miniscore) { |
| 1553 | if (hiscore->ifa) |
| 1554 | in6_ifa_put(hiscore->ifa); |
| 1555 | |
| 1556 | in6_ifa_hold(score->ifa); |
| 1557 | |
| 1558 | swap(hiscore, score); |
YOSHIFUJI Hideaki/吉藤英明 | c0b8da1 | 2015-07-13 23:28:10 +0900 | [diff] [blame] | 1559 | hiscore_idx = 1 - hiscore_idx; |
YOSHIFUJI Hideaki/吉藤英明 | 9131f3d | 2015-07-10 16:58:31 +0900 | [diff] [blame] | 1560 | |
| 1561 | /* restore our iterator */ |
| 1562 | score->ifa = hiscore->ifa; |
| 1563 | |
| 1564 | break; |
| 1565 | } |
| 1566 | } |
| 1567 | } |
| 1568 | out: |
| 1569 | read_unlock_bh(&idev->lock); |
YOSHIFUJI Hideaki/吉藤英明 | c0b8da1 | 2015-07-13 23:28:10 +0900 | [diff] [blame] | 1570 | return hiscore_idx; |
YOSHIFUJI Hideaki/吉藤英明 | 9131f3d | 2015-07-10 16:58:31 +0900 | [diff] [blame] | 1571 | } |
| 1572 | |
David Ahern | afbac601 | 2016-06-16 16:24:26 -0700 | [diff] [blame] | 1573 | static int ipv6_get_saddr_master(struct net *net, |
| 1574 | const struct net_device *dst_dev, |
| 1575 | const struct net_device *master, |
| 1576 | struct ipv6_saddr_dst *dst, |
| 1577 | struct ipv6_saddr_score *scores, |
| 1578 | int hiscore_idx) |
| 1579 | { |
| 1580 | struct inet6_dev *idev; |
| 1581 | |
| 1582 | idev = __in6_dev_get(dst_dev); |
| 1583 | if (idev) |
| 1584 | hiscore_idx = __ipv6_dev_get_saddr(net, dst, idev, |
| 1585 | scores, hiscore_idx); |
| 1586 | |
| 1587 | idev = __in6_dev_get(master); |
| 1588 | if (idev) |
| 1589 | hiscore_idx = __ipv6_dev_get_saddr(net, dst, idev, |
| 1590 | scores, hiscore_idx); |
| 1591 | |
| 1592 | return hiscore_idx; |
| 1593 | } |
| 1594 | |
Patrick McHardy | b3f644f | 2012-08-26 19:14:14 +0200 | [diff] [blame] | 1595 | 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] | 1596 | const struct in6_addr *daddr, unsigned int prefs, |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1597 | struct in6_addr *saddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1598 | { |
YOSHIFUJI Hideaki/吉藤英明 | c0b8da1 | 2015-07-13 23:28:10 +0900 | [diff] [blame] | 1599 | struct ipv6_saddr_score scores[2], *hiscore; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1600 | struct ipv6_saddr_dst dst; |
YOSHIFUJI Hideaki/吉藤英明 | 9131f3d | 2015-07-10 16:58:31 +0900 | [diff] [blame] | 1601 | struct inet6_dev *idev; |
YOSHIFUJI Hideaki | 072047e4 | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1602 | struct net_device *dev; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1603 | int dst_type; |
YOSHIFUJI Hideaki/吉藤英明 | 9131f3d | 2015-07-10 16:58:31 +0900 | [diff] [blame] | 1604 | bool use_oif_addr = false; |
YOSHIFUJI Hideaki/吉藤英明 | c0b8da1 | 2015-07-13 23:28:10 +0900 | [diff] [blame] | 1605 | int hiscore_idx = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1606 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1607 | dst_type = __ipv6_addr_type(daddr); |
| 1608 | dst.addr = daddr; |
| 1609 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; |
| 1610 | dst.scope = __ipv6_addr_src_scope(dst_type); |
Benjamin Thery | 3de2325 | 2008-05-28 14:51:24 +0200 | [diff] [blame] | 1611 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1612 | dst.prefs = prefs; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1613 | |
YOSHIFUJI Hideaki/吉藤英明 | c0b8da1 | 2015-07-13 23:28:10 +0900 | [diff] [blame] | 1614 | scores[hiscore_idx].rule = -1; |
| 1615 | scores[hiscore_idx].ifa = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1616 | |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1617 | rcu_read_lock(); |
YOSHIFUJI Hideaki | 072047e4 | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1618 | |
YOSHIFUJI Hideaki/吉藤英明 | 9131f3d | 2015-07-10 16:58:31 +0900 | [diff] [blame] | 1619 | /* Candidate Source Address (section 4) |
| 1620 | * - multicast and link-local destination address, |
| 1621 | * the set of candidate source address MUST only |
| 1622 | * include addresses assigned to interfaces |
| 1623 | * belonging to the same link as the outgoing |
| 1624 | * interface. |
| 1625 | * (- For site-local destination addresses, the |
| 1626 | * set of candidate source addresses MUST only |
| 1627 | * include addresses assigned to interfaces |
| 1628 | * belonging to the same site as the outgoing |
| 1629 | * interface.) |
Erik Kline | 3985e8a | 2015-07-22 16:38:25 +0900 | [diff] [blame] | 1630 | * - "It is RECOMMENDED that the candidate source addresses |
| 1631 | * be the set of unicast addresses assigned to the |
| 1632 | * interface that will be used to send to the destination |
| 1633 | * (the 'outgoing' interface)." (RFC 6724) |
YOSHIFUJI Hideaki/吉藤英明 | 9131f3d | 2015-07-10 16:58:31 +0900 | [diff] [blame] | 1634 | */ |
| 1635 | if (dst_dev) { |
Erik Kline | 3985e8a | 2015-07-22 16:38:25 +0900 | [diff] [blame] | 1636 | idev = __in6_dev_get(dst_dev); |
YOSHIFUJI Hideaki/吉藤英明 | 9131f3d | 2015-07-10 16:58:31 +0900 | [diff] [blame] | 1637 | if ((dst_type & IPV6_ADDR_MULTICAST) || |
Erik Kline | 3985e8a | 2015-07-22 16:38:25 +0900 | [diff] [blame] | 1638 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL || |
| 1639 | (idev && idev->cnf.use_oif_addrs_only)) { |
YOSHIFUJI Hideaki/吉藤英明 | 9131f3d | 2015-07-10 16:58:31 +0900 | [diff] [blame] | 1640 | use_oif_addr = true; |
YOSHIFUJI Hideaki | 072047e4 | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1641 | } |
YOSHIFUJI Hideaki/吉藤英明 | 9131f3d | 2015-07-10 16:58:31 +0900 | [diff] [blame] | 1642 | } |
| 1643 | |
| 1644 | if (use_oif_addr) { |
YOSHIFUJI Hideaki/吉藤英明 | c0b8da1 | 2015-07-13 23:28:10 +0900 | [diff] [blame] | 1645 | if (idev) |
YOSHIFUJI Hideaki | c15df30 | 2015-07-16 16:51:30 +0900 | [diff] [blame] | 1646 | 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] | 1647 | } else { |
David Ahern | afbac601 | 2016-06-16 16:24:26 -0700 | [diff] [blame] | 1648 | const struct net_device *master; |
| 1649 | int master_idx = 0; |
| 1650 | |
| 1651 | /* if dst_dev exists and is enslaved to an L3 device, then |
| 1652 | * prefer addresses from dst_dev and then the master over |
| 1653 | * any other enslaved devices in the L3 domain. |
| 1654 | */ |
| 1655 | master = l3mdev_master_dev_rcu(dst_dev); |
| 1656 | if (master) { |
| 1657 | master_idx = master->ifindex; |
| 1658 | |
| 1659 | hiscore_idx = ipv6_get_saddr_master(net, dst_dev, |
| 1660 | master, &dst, |
| 1661 | scores, hiscore_idx); |
| 1662 | |
| 1663 | if (scores[hiscore_idx].ifa) |
| 1664 | goto out; |
| 1665 | } |
| 1666 | |
YOSHIFUJI Hideaki/吉藤英明 | 9131f3d | 2015-07-10 16:58:31 +0900 | [diff] [blame] | 1667 | for_each_netdev_rcu(net, dev) { |
David Ahern | afbac601 | 2016-06-16 16:24:26 -0700 | [diff] [blame] | 1668 | /* only consider addresses on devices in the |
| 1669 | * same L3 domain |
| 1670 | */ |
| 1671 | if (l3mdev_master_ifindex_rcu(dev) != master_idx) |
| 1672 | continue; |
YOSHIFUJI Hideaki/吉藤英明 | 9131f3d | 2015-07-10 16:58:31 +0900 | [diff] [blame] | 1673 | idev = __in6_dev_get(dev); |
| 1674 | if (!idev) |
| 1675 | continue; |
YOSHIFUJI Hideaki | c15df30 | 2015-07-16 16:51:30 +0900 | [diff] [blame] | 1676 | 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] | 1677 | } |
YOSHIFUJI Hideaki | 072047e4 | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1678 | } |
David Ahern | afbac601 | 2016-06-16 16:24:26 -0700 | [diff] [blame] | 1679 | |
| 1680 | out: |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1681 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1682 | |
YOSHIFUJI Hideaki/吉藤英明 | c0b8da1 | 2015-07-13 23:28:10 +0900 | [diff] [blame] | 1683 | hiscore = &scores[hiscore_idx]; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1684 | if (!hiscore->ifa) |
YOSHIFUJI Hideaki | 072047e4 | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1685 | return -EADDRNOTAVAIL; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1686 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1687 | *saddr = hiscore->ifa->addr; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1688 | in6_ifa_put(hiscore->ifa); |
YOSHIFUJI Hideaki | 072047e4 | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1689 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1690 | } |
YOSHIFUJI Hideaki | 5e5f3f0 | 2008-03-03 21:44:34 +0900 | [diff] [blame] | 1691 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1692 | |
Amerigo Wang | 8965779 | 2013-06-29 21:30:49 +0800 | [diff] [blame] | 1693 | int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, |
Jiri Pirko | 479840f | 2013-12-06 09:45:21 +0100 | [diff] [blame] | 1694 | u32 banned_flags) |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 1695 | { |
| 1696 | struct inet6_ifaddr *ifp; |
| 1697 | int err = -EADDRNOTAVAIL; |
| 1698 | |
Hannes Frederic Sowa | 602582c | 2014-01-19 21:58:19 +0100 | [diff] [blame] | 1699 | list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) { |
| 1700 | if (ifp->scope > IFA_LINK) |
| 1701 | break; |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 1702 | if (ifp->scope == IFA_LINK && |
| 1703 | !(ifp->flags & banned_flags)) { |
| 1704 | *addr = ifp->addr; |
| 1705 | err = 0; |
| 1706 | break; |
| 1707 | } |
| 1708 | } |
| 1709 | return err; |
| 1710 | } |
| 1711 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1712 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
Jiri Pirko | 479840f | 2013-12-06 09:45:21 +0100 | [diff] [blame] | 1713 | u32 banned_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1714 | { |
| 1715 | struct inet6_dev *idev; |
| 1716 | int err = -EADDRNOTAVAIL; |
| 1717 | |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1718 | rcu_read_lock(); |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 1719 | idev = __in6_dev_get(dev); |
| 1720 | if (idev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1721 | read_lock_bh(&idev->lock); |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 1722 | err = __ipv6_get_lladdr(idev, addr, banned_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1723 | read_unlock_bh(&idev->lock); |
| 1724 | } |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1725 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1726 | return err; |
| 1727 | } |
| 1728 | |
| 1729 | static int ipv6_count_addresses(struct inet6_dev *idev) |
| 1730 | { |
| 1731 | int cnt = 0; |
| 1732 | struct inet6_ifaddr *ifp; |
| 1733 | |
| 1734 | read_lock_bh(&idev->lock); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 1735 | list_for_each_entry(ifp, &idev->addr_list, if_list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1736 | cnt++; |
| 1737 | read_unlock_bh(&idev->lock); |
| 1738 | return cnt; |
| 1739 | } |
| 1740 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1741 | int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
Florian Westphal | 2a7851b | 2013-05-17 03:56:10 +0000 | [diff] [blame] | 1742 | const struct net_device *dev, int strict) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1743 | { |
Erik Kline | c58da4c | 2015-02-04 20:01:23 +0900 | [diff] [blame] | 1744 | return ipv6_chk_addr_and_flags(net, addr, dev, strict, IFA_F_TENTATIVE); |
| 1745 | } |
| 1746 | EXPORT_SYMBOL(ipv6_chk_addr); |
| 1747 | |
| 1748 | int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr, |
| 1749 | const struct net_device *dev, int strict, |
| 1750 | u32 banned_flags) |
| 1751 | { |
Stephen Hemminger | eedf042 | 2010-05-17 22:27:12 -0700 | [diff] [blame] | 1752 | struct inet6_ifaddr *ifp; |
Eric Dumazet | ddbe503 | 2012-07-18 08:11:12 +0000 | [diff] [blame] | 1753 | unsigned int hash = inet6_addr_hash(addr); |
Erik Kline | c58da4c | 2015-02-04 20:01:23 +0900 | [diff] [blame] | 1754 | u32 ifp_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1755 | |
stephen hemminger | 5c578aed | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 1756 | rcu_read_lock_bh(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1757 | hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) { |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 1758 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
Daniel Lezcano | bfeade0 | 2008-01-10 22:43:18 -0800 | [diff] [blame] | 1759 | continue; |
Erik Kline | c58da4c | 2015-02-04 20:01:23 +0900 | [diff] [blame] | 1760 | /* Decouple optimistic from tentative for evaluation here. |
| 1761 | * Ban optimistic addresses explicitly, when required. |
| 1762 | */ |
| 1763 | ifp_flags = (ifp->flags&IFA_F_OPTIMISTIC) |
| 1764 | ? (ifp->flags&~IFA_F_TENTATIVE) |
| 1765 | : ifp->flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1766 | if (ipv6_addr_equal(&ifp->addr, addr) && |
Erik Kline | c58da4c | 2015-02-04 20:01:23 +0900 | [diff] [blame] | 1767 | !(ifp_flags&banned_flags) && |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 1768 | (!dev || ifp->idev->dev == dev || |
Stephen Hemminger | eedf042 | 2010-05-17 22:27:12 -0700 | [diff] [blame] | 1769 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) { |
| 1770 | rcu_read_unlock_bh(); |
| 1771 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1772 | } |
| 1773 | } |
stephen hemminger | 5c578aed | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 1774 | |
Stephen Hemminger | eedf042 | 2010-05-17 22:27:12 -0700 | [diff] [blame] | 1775 | rcu_read_unlock_bh(); |
| 1776 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1777 | } |
Erik Kline | c58da4c | 2015-02-04 20:01:23 +0900 | [diff] [blame] | 1778 | EXPORT_SYMBOL(ipv6_chk_addr_and_flags); |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 1779 | |
David S. Miller | 3e81c6d | 2010-03-20 16:18:00 -0700 | [diff] [blame] | 1780 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
| 1781 | struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1782 | { |
Eric Dumazet | ddbe503 | 2012-07-18 08:11:12 +0000 | [diff] [blame] | 1783 | unsigned int hash = inet6_addr_hash(addr); |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 1784 | struct inet6_ifaddr *ifp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1785 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1786 | hlist_for_each_entry(ifp, &inet6_addr_lst[hash], addr_lst) { |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 1787 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
Daniel Lezcano | 06bfe65 | 2008-01-10 22:43:42 -0800 | [diff] [blame] | 1788 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1789 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 1790 | if (!dev || ifp->idev->dev == dev) |
David S. Miller | 3e81c6d | 2010-03-20 16:18:00 -0700 | [diff] [blame] | 1791 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1792 | } |
| 1793 | } |
David S. Miller | 3e81c6d | 2010-03-20 16:18:00 -0700 | [diff] [blame] | 1794 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1795 | } |
| 1796 | |
Catalin\(ux\) M. BOIE | 7df37ff | 2013-09-23 23:04:19 +0300 | [diff] [blame] | 1797 | /* Compares an address/prefix_len with addresses on device @dev. |
| 1798 | * If one is found it returns true. |
| 1799 | */ |
| 1800 | bool ipv6_chk_custom_prefix(const struct in6_addr *addr, |
| 1801 | const unsigned int prefix_len, struct net_device *dev) |
| 1802 | { |
| 1803 | struct inet6_dev *idev; |
| 1804 | struct inet6_ifaddr *ifa; |
| 1805 | bool ret = false; |
| 1806 | |
| 1807 | rcu_read_lock(); |
| 1808 | idev = __in6_dev_get(dev); |
| 1809 | if (idev) { |
| 1810 | read_lock_bh(&idev->lock); |
| 1811 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
| 1812 | ret = ipv6_prefix_equal(addr, &ifa->addr, prefix_len); |
| 1813 | if (ret) |
| 1814 | break; |
| 1815 | } |
| 1816 | read_unlock_bh(&idev->lock); |
| 1817 | } |
| 1818 | rcu_read_unlock(); |
| 1819 | |
| 1820 | return ret; |
| 1821 | } |
| 1822 | EXPORT_SYMBOL(ipv6_chk_custom_prefix); |
| 1823 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1824 | 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] | 1825 | { |
| 1826 | struct inet6_dev *idev; |
| 1827 | struct inet6_ifaddr *ifa; |
| 1828 | int onlink; |
| 1829 | |
| 1830 | onlink = 0; |
| 1831 | rcu_read_lock(); |
| 1832 | idev = __in6_dev_get(dev); |
| 1833 | if (idev) { |
| 1834 | read_lock_bh(&idev->lock); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 1835 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
YOSHIFUJI Hideaki | 52eeeb8 | 2008-03-15 22:54:23 -0400 | [diff] [blame] | 1836 | onlink = ipv6_prefix_equal(addr, &ifa->addr, |
| 1837 | ifa->prefix_len); |
| 1838 | if (onlink) |
| 1839 | break; |
| 1840 | } |
| 1841 | read_unlock_bh(&idev->lock); |
| 1842 | } |
| 1843 | rcu_read_unlock(); |
| 1844 | return onlink; |
| 1845 | } |
YOSHIFUJI Hideaki | 52eeeb8 | 2008-03-15 22:54:23 -0400 | [diff] [blame] | 1846 | EXPORT_SYMBOL(ipv6_chk_prefix); |
| 1847 | |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 1848 | 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] | 1849 | struct net_device *dev, int strict) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1850 | { |
David S. Miller | b79d1d5 | 2010-03-25 21:39:21 -0700 | [diff] [blame] | 1851 | struct inet6_ifaddr *ifp, *result = NULL; |
Eric Dumazet | ddbe503 | 2012-07-18 08:11:12 +0000 | [diff] [blame] | 1852 | unsigned int hash = inet6_addr_hash(addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1853 | |
stephen hemminger | 5c578aed | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 1854 | rcu_read_lock_bh(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1855 | 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] | 1856 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
Daniel Lezcano | 1cab3da | 2008-01-10 22:44:09 -0800 | [diff] [blame] | 1857 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1858 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 1859 | if (!dev || ifp->idev->dev == dev || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1860 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { |
David S. Miller | b79d1d5 | 2010-03-25 21:39:21 -0700 | [diff] [blame] | 1861 | result = ifp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1862 | in6_ifa_hold(ifp); |
| 1863 | break; |
| 1864 | } |
| 1865 | } |
| 1866 | } |
stephen hemminger | 5c578aed | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 1867 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1868 | |
David S. Miller | b79d1d5 | 2010-03-25 21:39:21 -0700 | [diff] [blame] | 1869 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1870 | } |
| 1871 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1872 | /* Gets referenced address, destroys ifaddr */ |
| 1873 | |
Brian Haley | cc411d0 | 2009-09-09 14:41:32 +0000 | [diff] [blame] | 1874 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1875 | { |
Lubomir Rintel | 3d171f3 | 2016-01-08 13:47:23 +0100 | [diff] [blame] | 1876 | if (dad_failed) |
| 1877 | ifp->flags |= IFA_F_DADFAILED; |
| 1878 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1879 | if (ifp->flags&IFA_F_PERMANENT) { |
| 1880 | spin_lock_bh(&ifp->lock); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 1881 | addrconf_del_dad_work(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1882 | ifp->flags |= IFA_F_TENTATIVE; |
| 1883 | spin_unlock_bh(&ifp->lock); |
Herbert Xu | e2577a0 | 2010-03-13 12:23:29 -0800 | [diff] [blame] | 1884 | if (dad_failed) |
| 1885 | ipv6_ifa_notify(0, ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1886 | in6_ifa_put(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1887 | } else if (ifp->flags&IFA_F_TEMPORARY) { |
| 1888 | struct inet6_ifaddr *ifpub; |
| 1889 | spin_lock_bh(&ifp->lock); |
| 1890 | ifpub = ifp->ifpub; |
| 1891 | if (ifpub) { |
| 1892 | in6_ifa_hold(ifpub); |
| 1893 | spin_unlock_bh(&ifp->lock); |
| 1894 | ipv6_create_tempaddr(ifpub, ifp); |
| 1895 | in6_ifa_put(ifpub); |
| 1896 | } else { |
| 1897 | spin_unlock_bh(&ifp->lock); |
| 1898 | } |
| 1899 | ipv6_del_addr(ifp); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 1900 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1901 | ipv6_del_addr(ifp); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 1902 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1903 | } |
| 1904 | |
Herbert Xu | f2344a1 | 2010-05-18 15:55:27 -0700 | [diff] [blame] | 1905 | static int addrconf_dad_end(struct inet6_ifaddr *ifp) |
| 1906 | { |
| 1907 | int err = -ENOENT; |
| 1908 | |
Hannes Frederic Sowa | 8e8e676 | 2015-03-23 23:36:03 +0100 | [diff] [blame] | 1909 | spin_lock_bh(&ifp->lock); |
Herbert Xu | f2344a1 | 2010-05-18 15:55:27 -0700 | [diff] [blame] | 1910 | if (ifp->state == INET6_IFADDR_STATE_DAD) { |
| 1911 | ifp->state = INET6_IFADDR_STATE_POSTDAD; |
| 1912 | err = 0; |
| 1913 | } |
Hannes Frederic Sowa | 8e8e676 | 2015-03-23 23:36:03 +0100 | [diff] [blame] | 1914 | spin_unlock_bh(&ifp->lock); |
Herbert Xu | f2344a1 | 2010-05-18 15:55:27 -0700 | [diff] [blame] | 1915 | |
| 1916 | return err; |
| 1917 | } |
| 1918 | |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 1919 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
| 1920 | { |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 1921 | struct inet6_dev *idev = ifp->idev; |
Hannes Frederic Sowa | 1855b7c | 2015-03-23 23:36:05 +0100 | [diff] [blame] | 1922 | struct net *net = dev_net(ifp->idev->dev); |
Brian Haley | 9bdd8d4 | 2009-03-18 18:22:48 -0700 | [diff] [blame] | 1923 | |
Ursula Braun | 853dc2e | 2010-10-24 23:06:43 +0000 | [diff] [blame] | 1924 | if (addrconf_dad_end(ifp)) { |
| 1925 | in6_ifa_put(ifp); |
Herbert Xu | f2344a1 | 2010-05-18 15:55:27 -0700 | [diff] [blame] | 1926 | return; |
Ursula Braun | 853dc2e | 2010-10-24 23:06:43 +0000 | [diff] [blame] | 1927 | } |
Herbert Xu | f2344a1 | 2010-05-18 15:55:27 -0700 | [diff] [blame] | 1928 | |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 1929 | net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n", |
| 1930 | ifp->idev->dev->name, &ifp->addr); |
Brian Haley | 9bdd8d4 | 2009-03-18 18:22:48 -0700 | [diff] [blame] | 1931 | |
Hannes Frederic Sowa | 5f40ef7 | 2015-03-23 23:36:04 +0100 | [diff] [blame] | 1932 | spin_lock_bh(&ifp->lock); |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 1933 | |
Hannes Frederic Sowa | 5f40ef7 | 2015-03-23 23:36:04 +0100 | [diff] [blame] | 1934 | if (ifp->flags & IFA_F_STABLE_PRIVACY) { |
| 1935 | int scope = ifp->scope; |
| 1936 | u32 flags = ifp->flags; |
| 1937 | struct in6_addr new_addr; |
| 1938 | struct inet6_ifaddr *ifp2; |
| 1939 | u32 valid_lft, preferred_lft; |
| 1940 | int pfxlen = ifp->prefix_len; |
Hannes Frederic Sowa | 5f40ef7 | 2015-03-23 23:36:04 +0100 | [diff] [blame] | 1941 | int retries = ifp->stable_privacy_retry + 1; |
| 1942 | |
Hannes Frederic Sowa | 1855b7c | 2015-03-23 23:36:05 +0100 | [diff] [blame] | 1943 | if (retries > net->ipv6.sysctl.idgen_retries) { |
Hannes Frederic Sowa | 5f40ef7 | 2015-03-23 23:36:04 +0100 | [diff] [blame] | 1944 | net_info_ratelimited("%s: privacy stable address generation failed because of DAD conflicts!\n", |
| 1945 | ifp->idev->dev->name); |
| 1946 | goto errdad; |
| 1947 | } |
| 1948 | |
| 1949 | new_addr = ifp->addr; |
| 1950 | if (ipv6_generate_stable_address(&new_addr, retries, |
| 1951 | idev)) |
| 1952 | goto errdad; |
| 1953 | |
| 1954 | valid_lft = ifp->valid_lft; |
| 1955 | preferred_lft = ifp->prefered_lft; |
| 1956 | |
| 1957 | spin_unlock_bh(&ifp->lock); |
| 1958 | |
| 1959 | if (idev->cnf.max_addresses && |
| 1960 | ipv6_count_addresses(idev) >= |
| 1961 | idev->cnf.max_addresses) |
| 1962 | goto lock_errdad; |
| 1963 | |
| 1964 | net_info_ratelimited("%s: generating new stable privacy address because of DAD conflict\n", |
| 1965 | ifp->idev->dev->name); |
| 1966 | |
| 1967 | ifp2 = ipv6_add_addr(idev, &new_addr, NULL, pfxlen, |
| 1968 | scope, flags, valid_lft, |
| 1969 | preferred_lft); |
| 1970 | if (IS_ERR(ifp2)) |
| 1971 | goto lock_errdad; |
| 1972 | |
| 1973 | spin_lock_bh(&ifp2->lock); |
| 1974 | ifp2->stable_privacy_retry = retries; |
| 1975 | ifp2->state = INET6_IFADDR_STATE_PREDAD; |
| 1976 | spin_unlock_bh(&ifp2->lock); |
| 1977 | |
Hannes Frederic Sowa | 1855b7c | 2015-03-23 23:36:05 +0100 | [diff] [blame] | 1978 | addrconf_mod_dad_work(ifp2, net->ipv6.sysctl.idgen_delay); |
Hannes Frederic Sowa | 5f40ef7 | 2015-03-23 23:36:04 +0100 | [diff] [blame] | 1979 | in6_ifa_put(ifp2); |
| 1980 | lock_errdad: |
| 1981 | spin_lock_bh(&ifp->lock); |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 1982 | } |
| 1983 | |
Hannes Frederic Sowa | 5f40ef7 | 2015-03-23 23:36:04 +0100 | [diff] [blame] | 1984 | errdad: |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 1985 | /* transition from _POSTDAD to _ERRDAD */ |
| 1986 | ifp->state = INET6_IFADDR_STATE_ERRDAD; |
Hannes Frederic Sowa | 8e8e676 | 2015-03-23 23:36:03 +0100 | [diff] [blame] | 1987 | spin_unlock_bh(&ifp->lock); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 1988 | |
| 1989 | addrconf_mod_dad_work(ifp, 0); |
Wei Yongjun | 751eb6b | 2016-09-05 16:06:31 +0800 | [diff] [blame] | 1990 | in6_ifa_put(ifp); |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 1991 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1992 | |
Sabrina Dubroca | a9ed4a2 | 2014-09-02 10:29:29 +0200 | [diff] [blame] | 1993 | /* Join to solicited addr multicast group. |
| 1994 | * caller must hold RTNL */ |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1995 | 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] | 1996 | { |
| 1997 | struct in6_addr maddr; |
| 1998 | |
| 1999 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) |
| 2000 | return; |
| 2001 | |
| 2002 | addrconf_addr_solict_mult(addr, &maddr); |
| 2003 | ipv6_dev_mc_inc(dev, &maddr); |
| 2004 | } |
| 2005 | |
Sabrina Dubroca | a9ed4a2 | 2014-09-02 10:29:29 +0200 | [diff] [blame] | 2006 | /* caller must hold RTNL */ |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 2007 | 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] | 2008 | { |
| 2009 | struct in6_addr maddr; |
| 2010 | |
| 2011 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) |
| 2012 | return; |
| 2013 | |
| 2014 | addrconf_addr_solict_mult(addr, &maddr); |
| 2015 | __ipv6_dev_mc_dec(idev, &maddr); |
| 2016 | } |
| 2017 | |
Sabrina Dubroca | a9ed4a2 | 2014-09-02 10:29:29 +0200 | [diff] [blame] | 2018 | /* caller must hold RTNL */ |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 2019 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2020 | { |
| 2021 | struct in6_addr addr; |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 2022 | |
Hannes Frederic Sowa | 88ad314 | 2014-01-06 17:53:14 +0100 | [diff] [blame] | 2023 | if (ifp->prefix_len >= 127) /* RFC 6164 */ |
Bjørn Mork | 2bda8a0 | 2011-07-05 23:04:13 +0000 | [diff] [blame] | 2024 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2025 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
| 2026 | if (ipv6_addr_any(&addr)) |
| 2027 | return; |
WANG Cong | 013b4d9 | 2014-09-11 15:35:11 -0700 | [diff] [blame] | 2028 | __ipv6_dev_ac_inc(ifp->idev, &addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2029 | } |
| 2030 | |
Sabrina Dubroca | a9ed4a2 | 2014-09-02 10:29:29 +0200 | [diff] [blame] | 2031 | /* caller must hold RTNL */ |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 2032 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2033 | { |
| 2034 | struct in6_addr addr; |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 2035 | |
Hannes Frederic Sowa | 88ad314 | 2014-01-06 17:53:14 +0100 | [diff] [blame] | 2036 | if (ifp->prefix_len >= 127) /* RFC 6164 */ |
YOSHIFUJI Hideaki | 32019e6 | 2011-07-24 11:44:34 +0000 | [diff] [blame] | 2037 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2038 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
| 2039 | if (ipv6_addr_any(&addr)) |
| 2040 | return; |
| 2041 | __ipv6_dev_ac_dec(ifp->idev, &addr); |
| 2042 | } |
| 2043 | |
alex.bluesman.smirnov@gmail.com | 06a4c1c | 2012-05-10 03:25:52 +0000 | [diff] [blame] | 2044 | static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev) |
| 2045 | { |
Alexander Aring | 5241c2d | 2015-12-14 20:55:22 +0100 | [diff] [blame] | 2046 | if (dev->addr_len != EUI64_ADDR_LEN) |
alex.bluesman.smirnov@gmail.com | 06a4c1c | 2012-05-10 03:25:52 +0000 | [diff] [blame] | 2047 | return -1; |
Alexander Aring | 5241c2d | 2015-12-14 20:55:22 +0100 | [diff] [blame] | 2048 | memcpy(eui, dev->dev_addr, EUI64_ADDR_LEN); |
YOSHIFUJI Hideaki / 吉藤英明 | 5e98a36 | 2013-01-28 10:44:29 +0000 | [diff] [blame] | 2049 | eui[0] ^= 2; |
alex.bluesman.smirnov@gmail.com | 06a4c1c | 2012-05-10 03:25:52 +0000 | [diff] [blame] | 2050 | return 0; |
| 2051 | } |
| 2052 | |
YOSHIFUJI Hideaki / 吉藤英明 | cb6bf35 | 2013-03-25 08:26:24 +0000 | [diff] [blame] | 2053 | static int addrconf_ifid_ieee1394(u8 *eui, struct net_device *dev) |
| 2054 | { |
| 2055 | union fwnet_hwaddr *ha; |
| 2056 | |
| 2057 | if (dev->addr_len != FWNET_ALEN) |
| 2058 | return -1; |
| 2059 | |
| 2060 | ha = (union fwnet_hwaddr *)dev->dev_addr; |
| 2061 | |
| 2062 | memcpy(eui, &ha->uc.uniq_id, sizeof(ha->uc.uniq_id)); |
| 2063 | eui[0] ^= 2; |
| 2064 | return 0; |
| 2065 | } |
| 2066 | |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 2067 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) |
| 2068 | { |
| 2069 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ |
| 2070 | if (dev->addr_len != ARCNET_ALEN) |
| 2071 | return -1; |
| 2072 | memset(eui, 0, 7); |
Eldad Zack | 8e5e8f3 | 2012-04-01 07:49:08 +0000 | [diff] [blame] | 2073 | eui[7] = *(u8 *)dev->dev_addr; |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 2074 | return 0; |
| 2075 | } |
| 2076 | |
| 2077 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) |
| 2078 | { |
| 2079 | if (dev->addr_len != INFINIBAND_ALEN) |
| 2080 | return -1; |
| 2081 | memcpy(eui, dev->dev_addr + 12, 8); |
| 2082 | eui[0] |= 2; |
| 2083 | return 0; |
| 2084 | } |
| 2085 | |
stephen hemminger | c61393e | 2010-10-04 20:17:53 +0000 | [diff] [blame] | 2086 | static int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
YOSHIFUJI Hideaki | dfd982b | 2008-04-10 15:42:09 +0900 | [diff] [blame] | 2087 | { |
Sascha Hlusiak | 9af2851 | 2009-05-19 12:56:51 +0000 | [diff] [blame] | 2088 | if (addr == 0) |
| 2089 | return -1; |
YOSHIFUJI Hideaki | dfd982b | 2008-04-10 15:42:09 +0900 | [diff] [blame] | 2090 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || |
| 2091 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || |
| 2092 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || |
| 2093 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || |
| 2094 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || |
| 2095 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; |
| 2096 | eui[1] = 0; |
| 2097 | eui[2] = 0x5E; |
| 2098 | eui[3] = 0xFE; |
| 2099 | memcpy(eui + 4, &addr, 4); |
| 2100 | return 0; |
| 2101 | } |
YOSHIFUJI Hideaki | dfd982b | 2008-04-10 15:42:09 +0900 | [diff] [blame] | 2102 | |
| 2103 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) |
| 2104 | { |
| 2105 | if (dev->priv_flags & IFF_ISATAP) |
| 2106 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); |
| 2107 | return -1; |
| 2108 | } |
| 2109 | |
stephen hemminger | aee80b5 | 2011-06-08 10:44:30 +0000 | [diff] [blame] | 2110 | static int addrconf_ifid_gre(u8 *eui, struct net_device *dev) |
| 2111 | { |
| 2112 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); |
| 2113 | } |
| 2114 | |
Nicolas Dichtel | e837735 | 2013-08-20 12:16:06 +0200 | [diff] [blame] | 2115 | static int addrconf_ifid_ip6tnl(u8 *eui, struct net_device *dev) |
| 2116 | { |
| 2117 | memcpy(eui, dev->perm_addr, 3); |
| 2118 | memcpy(eui + 5, dev->perm_addr + 3, 3); |
| 2119 | eui[3] = 0xFF; |
| 2120 | eui[4] = 0xFE; |
| 2121 | eui[0] ^= 2; |
| 2122 | return 0; |
| 2123 | } |
| 2124 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2125 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
| 2126 | { |
| 2127 | switch (dev->type) { |
| 2128 | case ARPHRD_ETHER: |
| 2129 | case ARPHRD_FDDI: |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 2130 | return addrconf_ifid_eui48(eui, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2131 | case ARPHRD_ARCNET: |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 2132 | return addrconf_ifid_arcnet(eui, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2133 | case ARPHRD_INFINIBAND: |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 2134 | return addrconf_ifid_infiniband(eui, dev); |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 2135 | case ARPHRD_SIT: |
YOSHIFUJI Hideaki | dfd982b | 2008-04-10 15:42:09 +0900 | [diff] [blame] | 2136 | return addrconf_ifid_sit(eui, dev); |
stephen hemminger | aee80b5 | 2011-06-08 10:44:30 +0000 | [diff] [blame] | 2137 | case ARPHRD_IPGRE: |
| 2138 | return addrconf_ifid_gre(eui, dev); |
Jukka Rissanen | e74bccb8 | 2013-12-11 17:05:36 +0200 | [diff] [blame] | 2139 | case ARPHRD_6LOWPAN: |
alex.bluesman.smirnov@gmail.com | 06a4c1c | 2012-05-10 03:25:52 +0000 | [diff] [blame] | 2140 | return addrconf_ifid_eui64(eui, dev); |
YOSHIFUJI Hideaki / 吉藤英明 | cb6bf35 | 2013-03-25 08:26:24 +0000 | [diff] [blame] | 2141 | case ARPHRD_IEEE1394: |
| 2142 | return addrconf_ifid_ieee1394(eui, dev); |
Nicolas Dichtel | e837735 | 2013-08-20 12:16:06 +0200 | [diff] [blame] | 2143 | case ARPHRD_TUNNEL6: |
| 2144 | return addrconf_ifid_ip6tnl(eui, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2145 | } |
| 2146 | return -1; |
| 2147 | } |
| 2148 | |
| 2149 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) |
| 2150 | { |
| 2151 | int err = -1; |
| 2152 | struct inet6_ifaddr *ifp; |
| 2153 | |
| 2154 | read_lock_bh(&idev->lock); |
Hannes Frederic Sowa | 602582c | 2014-01-19 21:58:19 +0100 | [diff] [blame] | 2155 | list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) { |
| 2156 | if (ifp->scope > IFA_LINK) |
| 2157 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2158 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { |
| 2159 | memcpy(eui, ifp->addr.s6_addr+8, 8); |
| 2160 | err = 0; |
| 2161 | break; |
| 2162 | } |
| 2163 | } |
| 2164 | read_unlock_bh(&idev->lock); |
| 2165 | return err; |
| 2166 | } |
| 2167 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2168 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ |
Jiri Bohac | 9d6280d | 2016-10-13 18:50:02 +0200 | [diff] [blame] | 2169 | static void ipv6_regen_rndid(struct inet6_dev *idev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2170 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2171 | regen: |
YOSHIFUJI Hideaki | 955189e | 2006-03-20 16:54:09 -0800 | [diff] [blame] | 2172 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2173 | idev->rndid[0] &= ~0x02; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2174 | |
| 2175 | /* |
| 2176 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: |
| 2177 | * check if generated address is not inappropriate |
| 2178 | * |
| 2179 | * - Reserved subnet anycast (RFC 2526) |
| 2180 | * 11111101 11....11 1xxxxxxx |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 2181 | * - ISATAP (RFC4214) 6.1 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2182 | * 00-00-5E-FE-xx-xx-xx-xx |
| 2183 | * - value 0 |
| 2184 | * - XXX: already assigned to an address on the device |
| 2185 | */ |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2186 | if (idev->rndid[0] == 0xfd && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2187 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
| 2188 | (idev->rndid[7]&0x80)) |
| 2189 | goto regen; |
| 2190 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { |
| 2191 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) |
| 2192 | goto regen; |
| 2193 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) |
| 2194 | goto regen; |
| 2195 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2196 | } |
| 2197 | |
Jiri Bohac | 9d6280d | 2016-10-13 18:50:02 +0200 | [diff] [blame] | 2198 | 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] | 2199 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2200 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) |
Jiri Bohac | 9d6280d | 2016-10-13 18:50:02 +0200 | [diff] [blame] | 2201 | ipv6_regen_rndid(idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2202 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2203 | |
| 2204 | /* |
| 2205 | * Add prefix route. |
| 2206 | */ |
| 2207 | |
| 2208 | static void |
| 2209 | 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] | 2210 | unsigned long expires, u32 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2211 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2212 | struct fib6_config cfg = { |
David Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 2213 | .fc_table = l3mdev_fib_table(dev) ? : RT6_TABLE_PREFIX, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2214 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
| 2215 | .fc_ifindex = dev->ifindex, |
| 2216 | .fc_expires = expires, |
| 2217 | .fc_dst_len = plen, |
| 2218 | .fc_flags = RTF_UP | flags, |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2219 | .fc_nlinfo.nl_net = dev_net(dev), |
Stephen Hemminger | f410a1f | 2008-08-23 05:16:46 -0700 | [diff] [blame] | 2220 | .fc_protocol = RTPROT_KERNEL, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2221 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2222 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 2223 | cfg.fc_dst = *pfx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2224 | |
| 2225 | /* Prevent useless cloning on PtP SIT. |
| 2226 | This thing is done here expecting that the whole |
| 2227 | class of non-broadcast devices need not cloning. |
| 2228 | */ |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 2229 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2230 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
| 2231 | cfg.fc_flags |= RTF_NONEXTHOP; |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2232 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2233 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2234 | ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2235 | } |
| 2236 | |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 2237 | |
| 2238 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, |
| 2239 | int plen, |
| 2240 | const struct net_device *dev, |
| 2241 | u32 flags, u32 noflags) |
| 2242 | { |
| 2243 | struct fib6_node *fn; |
| 2244 | struct rt6_info *rt = NULL; |
| 2245 | struct fib6_table *table; |
David Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 2246 | u32 tb_id = l3mdev_fib_table(dev) ? : RT6_TABLE_PREFIX; |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 2247 | |
David Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 2248 | table = fib6_get_table(dev_net(dev), tb_id); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 2249 | if (!table) |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 2250 | return NULL; |
| 2251 | |
Li RongQing | 5744dd9 | 2012-09-11 21:59:01 +0000 | [diff] [blame] | 2252 | read_lock_bh(&table->tb6_lock); |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 2253 | fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0); |
| 2254 | if (!fn) |
| 2255 | goto out; |
Martin KaFai Lau | 1f56a01f | 2015-04-28 13:03:03 -0700 | [diff] [blame] | 2256 | |
| 2257 | noflags |= RTF_CACHE; |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 2258 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 2259 | if (rt->dst.dev->ifindex != dev->ifindex) |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 2260 | continue; |
| 2261 | if ((rt->rt6i_flags & flags) != flags) |
| 2262 | continue; |
Romain Kuntz | 85da53b | 2013-01-09 15:02:26 +0100 | [diff] [blame] | 2263 | if ((rt->rt6i_flags & noflags) != 0) |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 2264 | continue; |
| 2265 | dst_hold(&rt->dst); |
| 2266 | break; |
| 2267 | } |
| 2268 | out: |
Li RongQing | 5744dd9 | 2012-09-11 21:59:01 +0000 | [diff] [blame] | 2269 | read_unlock_bh(&table->tb6_lock); |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 2270 | return rt; |
| 2271 | } |
| 2272 | |
| 2273 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2274 | /* Create "default" multicast route to the interface */ |
| 2275 | |
| 2276 | static void addrconf_add_mroute(struct net_device *dev) |
| 2277 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2278 | struct fib6_config cfg = { |
David Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 2279 | .fc_table = l3mdev_fib_table(dev) ? : RT6_TABLE_LOCAL, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2280 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
| 2281 | .fc_ifindex = dev->ifindex, |
| 2282 | .fc_dst_len = 8, |
| 2283 | .fc_flags = RTF_UP, |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2284 | .fc_nlinfo.nl_net = dev_net(dev), |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2285 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2286 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2287 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); |
| 2288 | |
| 2289 | ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2290 | } |
| 2291 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2292 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) |
| 2293 | { |
| 2294 | struct inet6_dev *idev; |
| 2295 | |
| 2296 | ASSERT_RTNL(); |
| 2297 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 2298 | idev = ipv6_find_idev(dev); |
| 2299 | if (!idev) |
Brian Haley | 64e724f | 2010-07-20 10:34:30 +0000 | [diff] [blame] | 2300 | return ERR_PTR(-ENOBUFS); |
| 2301 | |
| 2302 | if (idev->cnf.disable_ipv6) |
| 2303 | return ERR_PTR(-EACCES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2304 | |
| 2305 | /* Add default multicast route */ |
David Ahern | ba46ee4 | 2016-06-13 13:44:18 -0700 | [diff] [blame] | 2306 | if (!(dev->flags & IFF_LOOPBACK) && !netif_is_l3_master(dev)) |
Li Wei | 4af04ab | 2011-12-06 21:23:45 +0000 | [diff] [blame] | 2307 | addrconf_add_mroute(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2308 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2309 | return idev; |
| 2310 | } |
| 2311 | |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 2312 | static void manage_tempaddrs(struct inet6_dev *idev, |
| 2313 | struct inet6_ifaddr *ifp, |
| 2314 | __u32 valid_lft, __u32 prefered_lft, |
| 2315 | bool create, unsigned long now) |
| 2316 | { |
| 2317 | u32 flags; |
| 2318 | struct inet6_ifaddr *ift; |
| 2319 | |
| 2320 | read_lock_bh(&idev->lock); |
| 2321 | /* update all temporary addresses in the list */ |
| 2322 | list_for_each_entry(ift, &idev->tempaddr_list, tmp_list) { |
| 2323 | int age, max_valid, max_prefered; |
| 2324 | |
| 2325 | if (ifp != ift->ifpub) |
| 2326 | continue; |
| 2327 | |
| 2328 | /* RFC 4941 section 3.3: |
| 2329 | * If a received option will extend the lifetime of a public |
| 2330 | * address, the lifetimes of temporary addresses should |
| 2331 | * be extended, subject to the overall constraint that no |
| 2332 | * temporary addresses should ever remain "valid" or "preferred" |
| 2333 | * for a time longer than (TEMP_VALID_LIFETIME) or |
| 2334 | * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), respectively. |
| 2335 | */ |
| 2336 | age = (now - ift->cstamp) / HZ; |
| 2337 | max_valid = idev->cnf.temp_valid_lft - age; |
| 2338 | if (max_valid < 0) |
| 2339 | max_valid = 0; |
| 2340 | |
| 2341 | max_prefered = idev->cnf.temp_prefered_lft - |
Jiri Bohac | 76506a9 | 2016-10-13 18:52:15 +0200 | [diff] [blame] | 2342 | idev->desync_factor - age; |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 2343 | if (max_prefered < 0) |
| 2344 | max_prefered = 0; |
| 2345 | |
| 2346 | if (valid_lft > max_valid) |
| 2347 | valid_lft = max_valid; |
| 2348 | |
| 2349 | if (prefered_lft > max_prefered) |
| 2350 | prefered_lft = max_prefered; |
| 2351 | |
| 2352 | spin_lock(&ift->lock); |
| 2353 | flags = ift->flags; |
| 2354 | ift->valid_lft = valid_lft; |
| 2355 | ift->prefered_lft = prefered_lft; |
| 2356 | ift->tstamp = now; |
| 2357 | if (prefered_lft > 0) |
| 2358 | ift->flags &= ~IFA_F_DEPRECATED; |
| 2359 | |
| 2360 | spin_unlock(&ift->lock); |
| 2361 | if (!(flags&IFA_F_TENTATIVE)) |
| 2362 | ipv6_ifa_notify(0, ift); |
| 2363 | } |
| 2364 | |
| 2365 | if ((create || list_empty(&idev->tempaddr_list)) && |
| 2366 | idev->cnf.use_tempaddr > 0) { |
| 2367 | /* When a new public address is created as described |
| 2368 | * in [ADDRCONF], also create a new temporary address. |
| 2369 | * Also create a temporary address if it's enabled but |
| 2370 | * no temporary address currently exists. |
| 2371 | */ |
| 2372 | read_unlock_bh(&idev->lock); |
| 2373 | ipv6_create_tempaddr(ifp, NULL); |
| 2374 | } else { |
| 2375 | read_unlock_bh(&idev->lock); |
| 2376 | } |
| 2377 | } |
| 2378 | |
Bjørn Mork | cc9da6c | 2015-12-16 16:44:38 +0100 | [diff] [blame] | 2379 | static bool is_addr_mode_generate_stable(struct inet6_dev *idev) |
| 2380 | { |
| 2381 | return idev->addr_gen_mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY || |
| 2382 | idev->addr_gen_mode == IN6_ADDR_GEN_MODE_RANDOM; |
| 2383 | } |
| 2384 | |
Alexander Aring | cc84b3c | 2016-06-15 21:20:24 +0200 | [diff] [blame] | 2385 | int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev, |
| 2386 | const struct prefix_info *pinfo, |
| 2387 | struct inet6_dev *in6_dev, |
| 2388 | const struct in6_addr *addr, int addr_type, |
| 2389 | u32 addr_flags, bool sllao, bool tokenized, |
| 2390 | __u32 valid_lft, u32 prefered_lft) |
Alexander Aring | 4f67223 | 2016-06-15 21:20:22 +0200 | [diff] [blame] | 2391 | { |
| 2392 | struct inet6_ifaddr *ifp = ipv6_get_ifaddr(net, addr, dev, 1); |
| 2393 | int create = 0, update_lft = 0; |
| 2394 | |
| 2395 | if (!ifp && valid_lft) { |
| 2396 | int max_addresses = in6_dev->cnf.max_addresses; |
| 2397 | |
| 2398 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 2399 | if (in6_dev->cnf.optimistic_dad && |
| 2400 | !net->ipv6.devconf_all->forwarding && sllao) |
| 2401 | addr_flags |= IFA_F_OPTIMISTIC; |
| 2402 | #endif |
| 2403 | |
| 2404 | /* Do not allow to create too much of autoconfigured |
| 2405 | * addresses; this would be too easy way to crash kernel. |
| 2406 | */ |
| 2407 | if (!max_addresses || |
| 2408 | ipv6_count_addresses(in6_dev) < max_addresses) |
| 2409 | ifp = ipv6_add_addr(in6_dev, addr, NULL, |
| 2410 | pinfo->prefix_len, |
| 2411 | addr_type&IPV6_ADDR_SCOPE_MASK, |
| 2412 | addr_flags, valid_lft, |
| 2413 | prefered_lft); |
| 2414 | |
| 2415 | if (IS_ERR_OR_NULL(ifp)) |
| 2416 | return -1; |
| 2417 | |
| 2418 | update_lft = 0; |
| 2419 | create = 1; |
| 2420 | spin_lock_bh(&ifp->lock); |
| 2421 | ifp->flags |= IFA_F_MANAGETEMPADDR; |
| 2422 | ifp->cstamp = jiffies; |
| 2423 | ifp->tokenized = tokenized; |
| 2424 | spin_unlock_bh(&ifp->lock); |
| 2425 | addrconf_dad_start(ifp); |
| 2426 | } |
| 2427 | |
| 2428 | if (ifp) { |
| 2429 | u32 flags; |
| 2430 | unsigned long now; |
| 2431 | u32 stored_lft; |
| 2432 | |
| 2433 | /* update lifetime (RFC2462 5.5.3 e) */ |
| 2434 | spin_lock_bh(&ifp->lock); |
| 2435 | now = jiffies; |
| 2436 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) |
| 2437 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; |
| 2438 | else |
| 2439 | stored_lft = 0; |
| 2440 | if (!update_lft && !create && stored_lft) { |
| 2441 | const u32 minimum_lft = min_t(u32, |
| 2442 | stored_lft, MIN_VALID_LIFETIME); |
| 2443 | valid_lft = max(valid_lft, minimum_lft); |
| 2444 | |
| 2445 | /* RFC4862 Section 5.5.3e: |
| 2446 | * "Note that the preferred lifetime of the |
| 2447 | * corresponding address is always reset to |
| 2448 | * the Preferred Lifetime in the received |
| 2449 | * Prefix Information option, regardless of |
| 2450 | * whether the valid lifetime is also reset or |
| 2451 | * ignored." |
| 2452 | * |
| 2453 | * So we should always update prefered_lft here. |
| 2454 | */ |
| 2455 | update_lft = 1; |
| 2456 | } |
| 2457 | |
| 2458 | if (update_lft) { |
| 2459 | ifp->valid_lft = valid_lft; |
| 2460 | ifp->prefered_lft = prefered_lft; |
| 2461 | ifp->tstamp = now; |
| 2462 | flags = ifp->flags; |
| 2463 | ifp->flags &= ~IFA_F_DEPRECATED; |
| 2464 | spin_unlock_bh(&ifp->lock); |
| 2465 | |
| 2466 | if (!(flags&IFA_F_TENTATIVE)) |
| 2467 | ipv6_ifa_notify(0, ifp); |
| 2468 | } else |
| 2469 | spin_unlock_bh(&ifp->lock); |
| 2470 | |
| 2471 | manage_tempaddrs(in6_dev, ifp, valid_lft, prefered_lft, |
| 2472 | create, now); |
| 2473 | |
| 2474 | in6_ifa_put(ifp); |
| 2475 | addrconf_verify(); |
| 2476 | } |
| 2477 | |
| 2478 | return 0; |
| 2479 | } |
Alexander Aring | cc84b3c | 2016-06-15 21:20:24 +0200 | [diff] [blame] | 2480 | EXPORT_SYMBOL_GPL(addrconf_prefix_rcv_add_addr); |
Alexander Aring | 4f67223 | 2016-06-15 21:20:22 +0200 | [diff] [blame] | 2481 | |
Neil Horman | e6bff995 | 2012-01-04 10:49:15 +0000 | [diff] [blame] | 2482 | 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] | 2483 | { |
| 2484 | struct prefix_info *pinfo; |
| 2485 | __u32 valid_lft; |
| 2486 | __u32 prefered_lft; |
Alexander Aring | 4f67223 | 2016-06-15 21:20:22 +0200 | [diff] [blame] | 2487 | int addr_type, err; |
Hannes Frederic Sowa | 64236f3 | 2015-03-23 23:36:02 +0100 | [diff] [blame] | 2488 | u32 addr_flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2489 | struct inet6_dev *in6_dev; |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 2490 | struct net *net = dev_net(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2491 | |
| 2492 | pinfo = (struct prefix_info *) opt; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2493 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2494 | if (len < sizeof(struct prefix_info)) { |
dingtianhong | ba3542e | 2013-08-17 10:27:04 +0800 | [diff] [blame] | 2495 | ADBG("addrconf: prefix option too short\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2496 | return; |
| 2497 | } |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2498 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2499 | /* |
| 2500 | * Validation checks ([ADDRCONF], page 19) |
| 2501 | */ |
| 2502 | |
| 2503 | addr_type = ipv6_addr_type(&pinfo->prefix); |
| 2504 | |
| 2505 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) |
| 2506 | return; |
| 2507 | |
| 2508 | valid_lft = ntohl(pinfo->valid); |
| 2509 | prefered_lft = ntohl(pinfo->prefered); |
| 2510 | |
| 2511 | if (prefered_lft > valid_lft) { |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 2512 | net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2513 | return; |
| 2514 | } |
| 2515 | |
| 2516 | in6_dev = in6_dev_get(dev); |
| 2517 | |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 2518 | if (!in6_dev) { |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 2519 | net_dbg_ratelimited("addrconf: device %s not configured\n", |
| 2520 | dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2521 | return; |
| 2522 | } |
| 2523 | |
| 2524 | /* |
| 2525 | * Two things going on here: |
| 2526 | * 1) Add routes for on-link prefixes |
| 2527 | * 2) Configure prefixes with the auto flag set |
| 2528 | */ |
| 2529 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2530 | if (pinfo->onlink) { |
| 2531 | struct rt6_info *rt; |
| 2532 | unsigned long rt_expires; |
| 2533 | |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2534 | /* Avoid arithmetic overflow. Really, we could |
| 2535 | * save rt_expires in seconds, likely valid_lft, |
| 2536 | * but it would require division in fib gc, that it |
| 2537 | * not good. |
| 2538 | */ |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2539 | if (HZ > USER_HZ) |
| 2540 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); |
| 2541 | else |
| 2542 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); |
YOSHIFUJI Hideaki | 3dd4bc6 | 2005-12-19 14:02:45 -0800 | [diff] [blame] | 2543 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2544 | if (addrconf_finite_timeout(rt_expires)) |
| 2545 | rt_expires *= HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2546 | |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 2547 | rt = addrconf_get_prefix_route(&pinfo->prefix, |
| 2548 | pinfo->prefix_len, |
| 2549 | dev, |
| 2550 | RTF_ADDRCONF | RTF_PREFIX_RT, |
| 2551 | RTF_GATEWAY | RTF_DEFAULT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2552 | |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 2553 | if (rt) { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2554 | /* Autoconf prefix route */ |
| 2555 | if (valid_lft == 0) { |
| 2556 | ip6_del_rt(rt); |
| 2557 | rt = NULL; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2558 | } else if (addrconf_finite_timeout(rt_expires)) { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2559 | /* not infinity */ |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 2560 | rt6_set_expires(rt, jiffies + rt_expires); |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2561 | } else { |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 2562 | rt6_clean_expires(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2563 | } |
| 2564 | } else if (valid_lft) { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2565 | clock_t expires = 0; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2566 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
| 2567 | if (addrconf_finite_timeout(rt_expires)) { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2568 | /* not infinity */ |
| 2569 | flags |= RTF_EXPIRES; |
| 2570 | expires = jiffies_to_clock_t(rt_expires); |
| 2571 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2572 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2573 | dev, expires, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2574 | } |
Amerigo Wang | 94e187c | 2012-10-29 00:13:19 +0000 | [diff] [blame] | 2575 | ip6_rt_put(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2576 | } |
| 2577 | |
| 2578 | /* Try to figure out our local address for this prefix */ |
| 2579 | |
| 2580 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2581 | struct in6_addr addr; |
Alexander Aring | f997c55 | 2016-06-15 21:20:23 +0200 | [diff] [blame] | 2582 | bool tokenized = false, dev_addr_generated = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2583 | |
| 2584 | if (pinfo->prefix_len == 64) { |
| 2585 | memcpy(&addr, &pinfo->prefix, 8); |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 2586 | |
| 2587 | if (!ipv6_addr_any(&in6_dev->token)) { |
| 2588 | read_lock_bh(&in6_dev->lock); |
| 2589 | memcpy(addr.s6_addr + 8, |
| 2590 | in6_dev->token.s6_addr + 8, 8); |
| 2591 | read_unlock_bh(&in6_dev->lock); |
Daniel Borkmann | 617fe29 | 2013-04-09 03:47:16 +0000 | [diff] [blame] | 2592 | tokenized = true; |
Bjørn Mork | cc9da6c | 2015-12-16 16:44:38 +0100 | [diff] [blame] | 2593 | } else if (is_addr_mode_generate_stable(in6_dev) && |
Hannes Frederic Sowa | 622c81d5 | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 2594 | !ipv6_generate_stable_address(&addr, 0, |
| 2595 | in6_dev)) { |
Hannes Frederic Sowa | 64236f3 | 2015-03-23 23:36:02 +0100 | [diff] [blame] | 2596 | addr_flags |= IFA_F_STABLE_PRIVACY; |
Hannes Frederic Sowa | 622c81d5 | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 2597 | goto ok; |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 2598 | } else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && |
| 2599 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { |
Alexander Aring | 4f67223 | 2016-06-15 21:20:22 +0200 | [diff] [blame] | 2600 | goto put; |
Alexander Aring | f997c55 | 2016-06-15 21:20:23 +0200 | [diff] [blame] | 2601 | } else { |
| 2602 | dev_addr_generated = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2603 | } |
| 2604 | goto ok; |
| 2605 | } |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 2606 | net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n", |
| 2607 | pinfo->prefix_len); |
Alexander Aring | 4f67223 | 2016-06-15 21:20:22 +0200 | [diff] [blame] | 2608 | goto put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2609 | |
| 2610 | ok: |
Alexander Aring | 4f67223 | 2016-06-15 21:20:22 +0200 | [diff] [blame] | 2611 | err = addrconf_prefix_rcv_add_addr(net, dev, pinfo, in6_dev, |
| 2612 | &addr, addr_type, |
| 2613 | addr_flags, sllao, |
| 2614 | tokenized, valid_lft, |
| 2615 | prefered_lft); |
| 2616 | if (err) |
| 2617 | goto put; |
Alexander Aring | f997c55 | 2016-06-15 21:20:23 +0200 | [diff] [blame] | 2618 | |
| 2619 | /* Ignore error case here because previous prefix add addr was |
| 2620 | * successful which will be notified. |
| 2621 | */ |
| 2622 | ndisc_ops_prefix_rcv_add_addr(net, dev, pinfo, in6_dev, &addr, |
| 2623 | addr_type, addr_flags, sllao, |
| 2624 | tokenized, valid_lft, |
| 2625 | prefered_lft, |
| 2626 | dev_addr_generated); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2627 | } |
| 2628 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); |
Alexander Aring | 4f67223 | 2016-06-15 21:20:22 +0200 | [diff] [blame] | 2629 | put: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2630 | in6_dev_put(in6_dev); |
| 2631 | } |
| 2632 | |
| 2633 | /* |
| 2634 | * Set destination address. |
| 2635 | * Special case for SIT interfaces where we create a new "virtual" |
| 2636 | * device. |
| 2637 | */ |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2638 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2639 | { |
| 2640 | struct in6_ifreq ireq; |
| 2641 | struct net_device *dev; |
| 2642 | int err = -EINVAL; |
| 2643 | |
| 2644 | rtnl_lock(); |
| 2645 | |
| 2646 | err = -EFAULT; |
| 2647 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
| 2648 | goto err_exit; |
| 2649 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2650 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2651 | |
| 2652 | err = -ENODEV; |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 2653 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2654 | goto err_exit; |
| 2655 | |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 2656 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2657 | if (dev->type == ARPHRD_SIT) { |
Stephen Hemminger | 5bc3eb7 | 2008-11-19 21:52:05 -0800 | [diff] [blame] | 2658 | const struct net_device_ops *ops = dev->netdev_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2659 | struct ifreq ifr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2660 | struct ip_tunnel_parm p; |
| 2661 | |
| 2662 | err = -EADDRNOTAVAIL; |
| 2663 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) |
| 2664 | goto err_exit; |
| 2665 | |
| 2666 | memset(&p, 0, sizeof(p)); |
| 2667 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; |
| 2668 | p.iph.saddr = 0; |
| 2669 | p.iph.version = 4; |
| 2670 | p.iph.ihl = 5; |
| 2671 | p.iph.protocol = IPPROTO_IPV6; |
| 2672 | p.iph.ttl = 64; |
Stephen Hemminger | d20b310 | 2008-01-21 00:48:43 -0800 | [diff] [blame] | 2673 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2674 | |
Stephen Hemminger | 5bc3eb7 | 2008-11-19 21:52:05 -0800 | [diff] [blame] | 2675 | if (ops->ndo_do_ioctl) { |
| 2676 | mm_segment_t oldfs = get_fs(); |
| 2677 | |
| 2678 | set_fs(KERNEL_DS); |
| 2679 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); |
| 2680 | set_fs(oldfs); |
| 2681 | } else |
| 2682 | err = -EOPNOTSUPP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2683 | |
| 2684 | if (err == 0) { |
| 2685 | err = -ENOBUFS; |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2686 | dev = __dev_get_by_name(net, p.name); |
| 2687 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2688 | goto err_exit; |
| 2689 | err = dev_open(dev); |
| 2690 | } |
| 2691 | } |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2692 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2693 | |
| 2694 | err_exit: |
| 2695 | rtnl_unlock(); |
| 2696 | return err; |
| 2697 | } |
| 2698 | |
Madhu Challa | 93a714d | 2015-02-25 09:58:35 -0800 | [diff] [blame] | 2699 | static int ipv6_mc_config(struct sock *sk, bool join, |
| 2700 | const struct in6_addr *addr, int ifindex) |
| 2701 | { |
| 2702 | int ret; |
| 2703 | |
| 2704 | ASSERT_RTNL(); |
| 2705 | |
| 2706 | lock_sock(sk); |
| 2707 | if (join) |
Marcelo Ricardo Leitner | 54ff9ef | 2015-03-18 14:50:43 -0300 | [diff] [blame] | 2708 | ret = ipv6_sock_mc_join(sk, ifindex, addr); |
Madhu Challa | 93a714d | 2015-02-25 09:58:35 -0800 | [diff] [blame] | 2709 | else |
Marcelo Ricardo Leitner | 54ff9ef | 2015-03-18 14:50:43 -0300 | [diff] [blame] | 2710 | ret = ipv6_sock_mc_drop(sk, ifindex, addr); |
Madhu Challa | 93a714d | 2015-02-25 09:58:35 -0800 | [diff] [blame] | 2711 | release_sock(sk); |
| 2712 | |
| 2713 | return ret; |
| 2714 | } |
| 2715 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2716 | /* |
| 2717 | * Manual configuration of address on an interface |
| 2718 | */ |
Jiri Pirko | 479840f | 2013-12-06 09:45:21 +0100 | [diff] [blame] | 2719 | static int inet6_addr_add(struct net *net, int ifindex, |
| 2720 | const struct in6_addr *pfx, |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 2721 | const struct in6_addr *peer_pfx, |
Jiri Pirko | 479840f | 2013-12-06 09:45:21 +0100 | [diff] [blame] | 2722 | unsigned int plen, __u32 ifa_flags, |
| 2723 | __u32 prefered_lft, __u32 valid_lft) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2724 | { |
| 2725 | struct inet6_ifaddr *ifp; |
| 2726 | struct inet6_dev *idev; |
| 2727 | struct net_device *dev; |
Madhu Challa | 93a714d | 2015-02-25 09:58:35 -0800 | [diff] [blame] | 2728 | unsigned long timeout; |
| 2729 | clock_t expires; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2730 | int scope; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2731 | u32 flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2732 | |
| 2733 | ASSERT_RTNL(); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2734 | |
Thomas Graf | 24ef0da | 2008-05-28 16:54:22 +0200 | [diff] [blame] | 2735 | if (plen > 128) |
| 2736 | return -EINVAL; |
| 2737 | |
Noriaki TAKAMIYA | 0778769d | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2738 | /* check the lifetime */ |
| 2739 | if (!valid_lft || prefered_lft > valid_lft) |
| 2740 | return -EINVAL; |
| 2741 | |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 2742 | if (ifa_flags & IFA_F_MANAGETEMPADDR && plen != 64) |
| 2743 | return -EINVAL; |
| 2744 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2745 | dev = __dev_get_by_index(net, ifindex); |
| 2746 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2747 | return -ENODEV; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2748 | |
Brian Haley | 64e724f | 2010-07-20 10:34:30 +0000 | [diff] [blame] | 2749 | idev = addrconf_add_dev(dev); |
| 2750 | if (IS_ERR(idev)) |
| 2751 | return PTR_ERR(idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2752 | |
Madhu Challa | 93a714d | 2015-02-25 09:58:35 -0800 | [diff] [blame] | 2753 | if (ifa_flags & IFA_F_MCAUTOJOIN) { |
| 2754 | int ret = ipv6_mc_config(net->ipv6.mc_autojoin_sk, |
| 2755 | true, pfx, ifindex); |
| 2756 | |
| 2757 | if (ret < 0) |
| 2758 | return ret; |
| 2759 | } |
| 2760 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2761 | scope = ipv6_addr_scope(pfx); |
| 2762 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2763 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
| 2764 | if (addrconf_finite_timeout(timeout)) { |
| 2765 | expires = jiffies_to_clock_t(timeout * HZ); |
| 2766 | valid_lft = timeout; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2767 | flags = RTF_EXPIRES; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2768 | } else { |
| 2769 | expires = 0; |
| 2770 | flags = 0; |
| 2771 | ifa_flags |= IFA_F_PERMANENT; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2772 | } |
Noriaki TAKAMIYA | 0778769d | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2773 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2774 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
| 2775 | if (addrconf_finite_timeout(timeout)) { |
| 2776 | if (timeout == 0) |
| 2777 | ifa_flags |= IFA_F_DEPRECATED; |
| 2778 | prefered_lft = timeout; |
| 2779 | } |
Noriaki TAKAMIYA | 0778769d | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2780 | |
Jiri Benc | 8a226b2 | 2013-08-01 10:41:28 +0200 | [diff] [blame] | 2781 | ifp = ipv6_add_addr(idev, pfx, peer_pfx, plen, scope, ifa_flags, |
| 2782 | valid_lft, prefered_lft); |
Noriaki TAKAMIYA | 0778769d | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2783 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2784 | if (!IS_ERR(ifp)) { |
Thomas Haller | 761aac7 | 2014-01-15 15:36:58 +0100 | [diff] [blame] | 2785 | if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) { |
| 2786 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
| 2787 | expires, flags); |
| 2788 | } |
| 2789 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2790 | /* |
| 2791 | * Note that section 3.1 of RFC 4429 indicates |
| 2792 | * that the Optimistic flag should not be set for |
| 2793 | * manually configured addresses |
| 2794 | */ |
David S. Miller | cf22f9a | 2012-04-14 21:37:40 -0400 | [diff] [blame] | 2795 | addrconf_dad_start(ifp); |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 2796 | if (ifa_flags & IFA_F_MANAGETEMPADDR) |
| 2797 | manage_tempaddrs(idev, ifp, valid_lft, prefered_lft, |
| 2798 | true, jiffies); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2799 | in6_ifa_put(ifp); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 2800 | addrconf_verify_rtnl(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2801 | return 0; |
Madhu Challa | 93a714d | 2015-02-25 09:58:35 -0800 | [diff] [blame] | 2802 | } else if (ifa_flags & IFA_F_MCAUTOJOIN) { |
| 2803 | ipv6_mc_config(net->ipv6.mc_autojoin_sk, |
| 2804 | false, pfx, ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2805 | } |
| 2806 | |
| 2807 | return PTR_ERR(ifp); |
| 2808 | } |
| 2809 | |
Heiner Kallweit | 6046d5b | 2014-04-20 21:29:36 +0200 | [diff] [blame] | 2810 | static int inet6_addr_del(struct net *net, int ifindex, u32 ifa_flags, |
| 2811 | const struct in6_addr *pfx, unsigned int plen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2812 | { |
| 2813 | struct inet6_ifaddr *ifp; |
| 2814 | struct inet6_dev *idev; |
| 2815 | struct net_device *dev; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2816 | |
Thomas Graf | 24ef0da | 2008-05-28 16:54:22 +0200 | [diff] [blame] | 2817 | if (plen > 128) |
| 2818 | return -EINVAL; |
| 2819 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2820 | dev = __dev_get_by_index(net, ifindex); |
| 2821 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2822 | return -ENODEV; |
| 2823 | |
Ian Morris | e5d08d7 | 2014-11-23 21:28:43 +0000 | [diff] [blame] | 2824 | idev = __in6_dev_get(dev); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 2825 | if (!idev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2826 | return -ENXIO; |
| 2827 | |
| 2828 | read_lock_bh(&idev->lock); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 2829 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2830 | if (ifp->prefix_len == plen && |
| 2831 | ipv6_addr_equal(pfx, &ifp->addr)) { |
| 2832 | in6_ifa_hold(ifp); |
| 2833 | read_unlock_bh(&idev->lock); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2834 | |
Heiner Kallweit | 6046d5b | 2014-04-20 21:29:36 +0200 | [diff] [blame] | 2835 | if (!(ifp->flags & IFA_F_TEMPORARY) && |
| 2836 | (ifa_flags & IFA_F_MANAGETEMPADDR)) |
| 2837 | manage_tempaddrs(idev, ifp, 0, 0, false, |
| 2838 | jiffies); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2839 | ipv6_del_addr(ifp); |
Heiner Kallweit | 6046d5b | 2014-04-20 21:29:36 +0200 | [diff] [blame] | 2840 | addrconf_verify_rtnl(); |
Madhu Challa | 93a714d | 2015-02-25 09:58:35 -0800 | [diff] [blame] | 2841 | if (ipv6_addr_is_multicast(pfx)) { |
| 2842 | ipv6_mc_config(net->ipv6.mc_autojoin_sk, |
| 2843 | false, pfx, dev->ifindex); |
| 2844 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2845 | return 0; |
| 2846 | } |
| 2847 | } |
| 2848 | read_unlock_bh(&idev->lock); |
| 2849 | return -EADDRNOTAVAIL; |
| 2850 | } |
| 2851 | |
| 2852 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2853 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2854 | { |
| 2855 | struct in6_ifreq ireq; |
| 2856 | int err; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2857 | |
Eric W. Biederman | af31f41 | 2012-11-16 03:03:06 +0000 | [diff] [blame] | 2858 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2859 | return -EPERM; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2860 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2861 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
| 2862 | return -EFAULT; |
| 2863 | |
| 2864 | rtnl_lock(); |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 2865 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, NULL, |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2866 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, |
| 2867 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2868 | rtnl_unlock(); |
| 2869 | return err; |
| 2870 | } |
| 2871 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2872 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2873 | { |
| 2874 | struct in6_ifreq ireq; |
| 2875 | int err; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2876 | |
Eric W. Biederman | af31f41 | 2012-11-16 03:03:06 +0000 | [diff] [blame] | 2877 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2878 | return -EPERM; |
| 2879 | |
| 2880 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
| 2881 | return -EFAULT; |
| 2882 | |
| 2883 | rtnl_lock(); |
Heiner Kallweit | 6046d5b | 2014-04-20 21:29:36 +0200 | [diff] [blame] | 2884 | err = inet6_addr_del(net, ireq.ifr6_ifindex, 0, &ireq.ifr6_addr, |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2885 | ireq.ifr6_prefixlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2886 | rtnl_unlock(); |
| 2887 | return err; |
| 2888 | } |
| 2889 | |
Ilpo Järvinen | b5f348e | 2009-02-06 23:48:01 -0800 | [diff] [blame] | 2890 | static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
| 2891 | int plen, int scope) |
| 2892 | { |
| 2893 | struct inet6_ifaddr *ifp; |
| 2894 | |
Jiri Benc | 8a226b2 | 2013-08-01 10:41:28 +0200 | [diff] [blame] | 2895 | ifp = ipv6_add_addr(idev, addr, NULL, plen, |
Hannes Frederic Sowa | 07edd74 | 2014-01-08 15:43:22 +0100 | [diff] [blame] | 2896 | scope, IFA_F_PERMANENT, |
| 2897 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); |
Ilpo Järvinen | b5f348e | 2009-02-06 23:48:01 -0800 | [diff] [blame] | 2898 | if (!IS_ERR(ifp)) { |
| 2899 | spin_lock_bh(&ifp->lock); |
| 2900 | ifp->flags &= ~IFA_F_TENTATIVE; |
| 2901 | spin_unlock_bh(&ifp->lock); |
| 2902 | ipv6_ifa_notify(RTM_NEWADDR, ifp); |
| 2903 | in6_ifa_put(ifp); |
| 2904 | } |
| 2905 | } |
| 2906 | |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 2907 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2908 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
| 2909 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2910 | struct in6_addr addr; |
| 2911 | struct net_device *dev; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2912 | struct net *net = dev_net(idev->dev); |
Nicolas Dichtel | 929c9cf | 2013-11-14 13:51:05 +0100 | [diff] [blame] | 2913 | int scope, plen; |
Nicolas Dichtel | f0e2acf | 2013-11-14 13:51:06 +0100 | [diff] [blame] | 2914 | u32 pflags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2915 | |
| 2916 | ASSERT_RTNL(); |
| 2917 | |
| 2918 | memset(&addr, 0, sizeof(struct in6_addr)); |
| 2919 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); |
| 2920 | |
| 2921 | if (idev->dev->flags&IFF_POINTOPOINT) { |
| 2922 | addr.s6_addr32[0] = htonl(0xfe800000); |
| 2923 | scope = IFA_LINK; |
Nicolas Dichtel | 929c9cf | 2013-11-14 13:51:05 +0100 | [diff] [blame] | 2924 | plen = 64; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2925 | } else { |
| 2926 | scope = IPV6_ADDR_COMPATv4; |
Nicolas Dichtel | 929c9cf | 2013-11-14 13:51:05 +0100 | [diff] [blame] | 2927 | plen = 96; |
Nicolas Dichtel | f0e2acf | 2013-11-14 13:51:06 +0100 | [diff] [blame] | 2928 | pflags |= RTF_NONEXTHOP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2929 | } |
| 2930 | |
| 2931 | if (addr.s6_addr32[3]) { |
Nicolas Dichtel | 929c9cf | 2013-11-14 13:51:05 +0100 | [diff] [blame] | 2932 | add_addr(idev, &addr, plen, scope); |
Nicolas Dichtel | f0e2acf | 2013-11-14 13:51:06 +0100 | [diff] [blame] | 2933 | addrconf_prefix_route(&addr, plen, idev->dev, 0, pflags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2934 | return; |
| 2935 | } |
| 2936 | |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 2937 | for_each_netdev(net, dev) { |
Eldad Zack | 8e5e8f3 | 2012-04-01 07:49:08 +0000 | [diff] [blame] | 2938 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2939 | if (in_dev && (dev->flags & IFF_UP)) { |
Eldad Zack | 8e5e8f3 | 2012-04-01 07:49:08 +0000 | [diff] [blame] | 2940 | struct in_ifaddr *ifa; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2941 | |
| 2942 | int flag = scope; |
| 2943 | |
| 2944 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2945 | |
| 2946 | addr.s6_addr32[3] = ifa->ifa_local; |
| 2947 | |
| 2948 | if (ifa->ifa_scope == RT_SCOPE_LINK) |
| 2949 | continue; |
| 2950 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { |
| 2951 | if (idev->dev->flags&IFF_POINTOPOINT) |
| 2952 | continue; |
| 2953 | flag |= IFA_HOST; |
| 2954 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2955 | |
Ilpo Järvinen | b5f348e | 2009-02-06 23:48:01 -0800 | [diff] [blame] | 2956 | add_addr(idev, &addr, plen, flag); |
Nicolas Dichtel | f0e2acf | 2013-11-14 13:51:06 +0100 | [diff] [blame] | 2957 | addrconf_prefix_route(&addr, plen, idev->dev, 0, |
| 2958 | pflags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2959 | } |
| 2960 | } |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2961 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2962 | } |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2963 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2964 | |
| 2965 | static void init_loopback(struct net_device *dev) |
| 2966 | { |
| 2967 | struct inet6_dev *idev; |
Balakumaran Kannan | 25fb6ca4 | 2013-04-02 16:15:05 +0530 | [diff] [blame] | 2968 | struct net_device *sp_dev; |
| 2969 | struct inet6_ifaddr *sp_ifa; |
| 2970 | struct rt6_info *sp_rt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2971 | |
| 2972 | /* ::1 */ |
| 2973 | |
| 2974 | ASSERT_RTNL(); |
| 2975 | |
Ian Morris | e5d08d7 | 2014-11-23 21:28:43 +0000 | [diff] [blame] | 2976 | idev = ipv6_find_idev(dev); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 2977 | if (!idev) { |
Joe Perches | 91df42b | 2012-05-15 14:11:54 +0000 | [diff] [blame] | 2978 | pr_debug("%s: add_dev failed\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2979 | return; |
| 2980 | } |
| 2981 | |
Ilpo Järvinen | b5f348e | 2009-02-06 23:48:01 -0800 | [diff] [blame] | 2982 | add_addr(idev, &in6addr_loopback, 128, IFA_HOST); |
Balakumaran Kannan | 25fb6ca4 | 2013-04-02 16:15:05 +0530 | [diff] [blame] | 2983 | |
| 2984 | /* Add routes to other interface's IPv6 addresses */ |
| 2985 | for_each_netdev(dev_net(dev), sp_dev) { |
| 2986 | if (!strcmp(sp_dev->name, dev->name)) |
| 2987 | continue; |
| 2988 | |
| 2989 | idev = __in6_dev_get(sp_dev); |
| 2990 | if (!idev) |
| 2991 | continue; |
| 2992 | |
| 2993 | read_lock_bh(&idev->lock); |
| 2994 | list_for_each_entry(sp_ifa, &idev->addr_list, if_list) { |
| 2995 | |
| 2996 | if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE)) |
| 2997 | continue; |
| 2998 | |
Gao feng | 33d9911 | 2014-01-24 16:29:11 +0800 | [diff] [blame] | 2999 | if (sp_ifa->rt) { |
| 3000 | /* This dst has been added to garbage list when |
| 3001 | * lo device down, release this obsolete dst and |
| 3002 | * reallocate a new router for ifa. |
| 3003 | */ |
Nicolas Dichtel | a220445 | 2016-10-12 10:10:40 +0200 | [diff] [blame] | 3004 | if (!atomic_read(&sp_ifa->rt->rt6i_ref)) { |
Gao feng | 33d9911 | 2014-01-24 16:29:11 +0800 | [diff] [blame] | 3005 | ip6_rt_put(sp_ifa->rt); |
| 3006 | sp_ifa->rt = NULL; |
| 3007 | } else { |
| 3008 | continue; |
| 3009 | } |
| 3010 | } |
Gao feng | a881ae1 | 2013-06-16 11:14:30 +0800 | [diff] [blame] | 3011 | |
François-Xavier Le Bail | 57ec0af | 2013-12-02 11:28:49 +0100 | [diff] [blame] | 3012 | sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, false); |
Balakumaran Kannan | 25fb6ca4 | 2013-04-02 16:15:05 +0530 | [diff] [blame] | 3013 | |
| 3014 | /* Failure cases are ignored */ |
Gao feng | 534c877 | 2013-06-02 22:16:21 +0000 | [diff] [blame] | 3015 | if (!IS_ERR(sp_rt)) { |
| 3016 | sp_ifa->rt = sp_rt; |
Balakumaran Kannan | 25fb6ca4 | 2013-04-02 16:15:05 +0530 | [diff] [blame] | 3017 | ip6_ins_rt(sp_rt); |
Gao feng | 534c877 | 2013-06-02 22:16:21 +0000 | [diff] [blame] | 3018 | } |
Balakumaran Kannan | 25fb6ca4 | 2013-04-02 16:15:05 +0530 | [diff] [blame] | 3019 | } |
| 3020 | read_unlock_bh(&idev->lock); |
| 3021 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3022 | } |
| 3023 | |
Alexander Aring | 2ad3ed5 | 2016-06-15 21:20:17 +0200 | [diff] [blame] | 3024 | void addrconf_add_linklocal(struct inet6_dev *idev, |
| 3025 | const struct in6_addr *addr, u32 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3026 | { |
Eldad Zack | 8e5e8f3 | 2012-04-01 07:49:08 +0000 | [diff] [blame] | 3027 | struct inet6_ifaddr *ifp; |
Hannes Frederic Sowa | 64236f3 | 2015-03-23 23:36:02 +0100 | [diff] [blame] | 3028 | u32 addr_flags = flags | IFA_F_PERMANENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3029 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 3030 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 3031 | if (idev->cnf.optimistic_dad && |
David Miller | 702beb8 | 2008-07-20 18:17:02 -0700 | [diff] [blame] | 3032 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 3033 | addr_flags |= IFA_F_OPTIMISTIC; |
| 3034 | #endif |
| 3035 | |
Hannes Frederic Sowa | 07edd74 | 2014-01-08 15:43:22 +0100 | [diff] [blame] | 3036 | ifp = ipv6_add_addr(idev, addr, NULL, 64, IFA_LINK, addr_flags, |
| 3037 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3038 | if (!IS_ERR(ifp)) { |
YOSHIFUJI Hideaki | 46d4804 | 2007-02-07 20:36:26 +0900 | [diff] [blame] | 3039 | 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] | 3040 | addrconf_dad_start(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3041 | in6_ifa_put(ifp); |
| 3042 | } |
| 3043 | } |
Alexander Aring | 2ad3ed5 | 2016-06-15 21:20:17 +0200 | [diff] [blame] | 3044 | EXPORT_SYMBOL_GPL(addrconf_add_linklocal); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3045 | |
Hannes Frederic Sowa | 622c81d5 | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 3046 | static bool ipv6_reserved_interfaceid(struct in6_addr address) |
| 3047 | { |
| 3048 | if ((address.s6_addr32[2] | address.s6_addr32[3]) == 0) |
| 3049 | return true; |
| 3050 | |
| 3051 | if (address.s6_addr32[2] == htonl(0x02005eff) && |
| 3052 | ((address.s6_addr32[3] & htonl(0xfe000000)) == htonl(0xfe000000))) |
| 3053 | return true; |
| 3054 | |
| 3055 | if (address.s6_addr32[2] == htonl(0xfdffffff) && |
| 3056 | ((address.s6_addr32[3] & htonl(0xffffff80)) == htonl(0xffffff80))) |
| 3057 | return true; |
| 3058 | |
| 3059 | return false; |
| 3060 | } |
| 3061 | |
| 3062 | static int ipv6_generate_stable_address(struct in6_addr *address, |
| 3063 | u8 dad_count, |
| 3064 | const struct inet6_dev *idev) |
| 3065 | { |
Hannes Frederic Sowa | 622c81d5 | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 3066 | static DEFINE_SPINLOCK(lock); |
| 3067 | static __u32 digest[SHA_DIGEST_WORDS]; |
| 3068 | static __u32 workspace[SHA_WORKSPACE_WORDS]; |
| 3069 | |
| 3070 | static union { |
| 3071 | char __data[SHA_MESSAGE_BYTES]; |
| 3072 | struct { |
| 3073 | struct in6_addr secret; |
Hannes Frederic Sowa | ff40217 | 2015-03-24 11:05:28 +0100 | [diff] [blame] | 3074 | __be32 prefix[2]; |
Hannes Frederic Sowa | 622c81d5 | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 3075 | unsigned char hwaddr[MAX_ADDR_LEN]; |
| 3076 | u8 dad_count; |
| 3077 | } __packed; |
| 3078 | } data; |
| 3079 | |
| 3080 | struct in6_addr secret; |
| 3081 | struct in6_addr temp; |
| 3082 | struct net *net = dev_net(idev->dev); |
| 3083 | |
| 3084 | BUILD_BUG_ON(sizeof(data.__data) != sizeof(data)); |
| 3085 | |
| 3086 | if (idev->cnf.stable_secret.initialized) |
| 3087 | secret = idev->cnf.stable_secret.secret; |
| 3088 | else if (net->ipv6.devconf_dflt->stable_secret.initialized) |
| 3089 | secret = net->ipv6.devconf_dflt->stable_secret.secret; |
| 3090 | else |
| 3091 | return -1; |
| 3092 | |
| 3093 | retry: |
| 3094 | spin_lock_bh(&lock); |
| 3095 | |
| 3096 | sha_init(digest); |
| 3097 | memset(&data, 0, sizeof(data)); |
| 3098 | memset(workspace, 0, sizeof(workspace)); |
| 3099 | memcpy(data.hwaddr, idev->dev->perm_addr, idev->dev->addr_len); |
Hannes Frederic Sowa | ff40217 | 2015-03-24 11:05:28 +0100 | [diff] [blame] | 3100 | data.prefix[0] = address->s6_addr32[0]; |
| 3101 | data.prefix[1] = address->s6_addr32[1]; |
Hannes Frederic Sowa | 622c81d5 | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 3102 | data.secret = secret; |
| 3103 | data.dad_count = dad_count; |
| 3104 | |
| 3105 | sha_transform(digest, data.__data, workspace); |
| 3106 | |
| 3107 | temp = *address; |
Hannes Frederic Sowa | ff40217 | 2015-03-24 11:05:28 +0100 | [diff] [blame] | 3108 | temp.s6_addr32[2] = (__force __be32)digest[0]; |
| 3109 | temp.s6_addr32[3] = (__force __be32)digest[1]; |
Hannes Frederic Sowa | 622c81d5 | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 3110 | |
| 3111 | spin_unlock_bh(&lock); |
| 3112 | |
| 3113 | if (ipv6_reserved_interfaceid(temp)) { |
| 3114 | dad_count++; |
Hannes Frederic Sowa | 1855b7c | 2015-03-23 23:36:05 +0100 | [diff] [blame] | 3115 | if (dad_count > dev_net(idev->dev)->ipv6.sysctl.idgen_retries) |
Hannes Frederic Sowa | 622c81d5 | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 3116 | return -1; |
| 3117 | goto retry; |
| 3118 | } |
| 3119 | |
| 3120 | *address = temp; |
| 3121 | return 0; |
| 3122 | } |
| 3123 | |
Bjørn Mork | cc9da6c | 2015-12-16 16:44:38 +0100 | [diff] [blame] | 3124 | static void ipv6_gen_mode_random_init(struct inet6_dev *idev) |
| 3125 | { |
| 3126 | struct ipv6_stable_secret *s = &idev->cnf.stable_secret; |
| 3127 | |
| 3128 | if (s->initialized) |
| 3129 | return; |
| 3130 | s = &idev->cnf.stable_secret; |
| 3131 | get_random_bytes(&s->secret, sizeof(s->secret)); |
| 3132 | s->initialized = true; |
| 3133 | } |
| 3134 | |
Jiri Pirko | bc91b0f | 2014-07-11 21:10:18 +0200 | [diff] [blame] | 3135 | static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route) |
| 3136 | { |
Hannes Frederic Sowa | 622c81d5 | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 3137 | struct in6_addr addr; |
Jiri Pirko | bc91b0f | 2014-07-11 21:10:18 +0200 | [diff] [blame] | 3138 | |
David Ahern | ca25449 | 2015-10-12 11:47:10 -0700 | [diff] [blame] | 3139 | /* no link local addresses on L3 master devices */ |
| 3140 | if (netif_is_l3_master(idev->dev)) |
| 3141 | return; |
| 3142 | |
Hannes Frederic Sowa | 622c81d5 | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 3143 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); |
| 3144 | |
Bjørn Mork | cc9da6c | 2015-12-16 16:44:38 +0100 | [diff] [blame] | 3145 | switch (idev->addr_gen_mode) { |
| 3146 | case IN6_ADDR_GEN_MODE_RANDOM: |
| 3147 | ipv6_gen_mode_random_init(idev); |
| 3148 | /* fallthrough */ |
| 3149 | case IN6_ADDR_GEN_MODE_STABLE_PRIVACY: |
Hannes Frederic Sowa | 622c81d5 | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 3150 | if (!ipv6_generate_stable_address(&addr, 0, idev)) |
Hannes Frederic Sowa | 64236f3 | 2015-03-23 23:36:02 +0100 | [diff] [blame] | 3151 | addrconf_add_linklocal(idev, &addr, |
| 3152 | IFA_F_STABLE_PRIVACY); |
Hannes Frederic Sowa | 622c81d5 | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 3153 | else if (prefix_route) |
| 3154 | addrconf_prefix_route(&addr, 64, idev->dev, 0, 0); |
Bjørn Mork | cc9da6c | 2015-12-16 16:44:38 +0100 | [diff] [blame] | 3155 | break; |
| 3156 | case IN6_ADDR_GEN_MODE_EUI64: |
Jiri Pirko | bc91b0f | 2014-07-11 21:10:18 +0200 | [diff] [blame] | 3157 | /* addrconf_add_linklocal also adds a prefix_route and we |
| 3158 | * only need to care about prefix routes if ipv6_generate_eui64 |
| 3159 | * couldn't generate one. |
| 3160 | */ |
| 3161 | if (ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) == 0) |
Hannes Frederic Sowa | 64236f3 | 2015-03-23 23:36:02 +0100 | [diff] [blame] | 3162 | addrconf_add_linklocal(idev, &addr, 0); |
Jiri Pirko | bc91b0f | 2014-07-11 21:10:18 +0200 | [diff] [blame] | 3163 | else if (prefix_route) |
| 3164 | addrconf_prefix_route(&addr, 64, idev->dev, 0, 0); |
Bjørn Mork | cc9da6c | 2015-12-16 16:44:38 +0100 | [diff] [blame] | 3165 | break; |
| 3166 | case IN6_ADDR_GEN_MODE_NONE: |
| 3167 | default: |
| 3168 | /* will not add any link local address */ |
| 3169 | break; |
Jiri Pirko | bc91b0f | 2014-07-11 21:10:18 +0200 | [diff] [blame] | 3170 | } |
| 3171 | } |
| 3172 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3173 | static void addrconf_dev_config(struct net_device *dev) |
| 3174 | { |
Eldad Zack | 8e5e8f3 | 2012-04-01 07:49:08 +0000 | [diff] [blame] | 3175 | struct inet6_dev *idev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3176 | |
| 3177 | ASSERT_RTNL(); |
| 3178 | |
Herbert Xu | 74235a2 | 2007-06-14 13:02:55 -0700 | [diff] [blame] | 3179 | if ((dev->type != ARPHRD_ETHER) && |
| 3180 | (dev->type != ARPHRD_FDDI) && |
Herbert Xu | 74235a2 | 2007-06-14 13:02:55 -0700 | [diff] [blame] | 3181 | (dev->type != ARPHRD_ARCNET) && |
alex.bluesman.smirnov@gmail.com | 06a4c1c | 2012-05-10 03:25:52 +0000 | [diff] [blame] | 3182 | (dev->type != ARPHRD_INFINIBAND) && |
Nicolas Dichtel | e837735 | 2013-08-20 12:16:06 +0200 | [diff] [blame] | 3183 | (dev->type != ARPHRD_IEEE1394) && |
Jukka Rissanen | e74bccb8 | 2013-12-11 17:05:36 +0200 | [diff] [blame] | 3184 | (dev->type != ARPHRD_TUNNEL6) && |
Bjørn Mork | cc9da6c | 2015-12-16 16:44:38 +0100 | [diff] [blame] | 3185 | (dev->type != ARPHRD_6LOWPAN) && |
| 3186 | (dev->type != ARPHRD_NONE)) { |
Herbert Xu | 74235a2 | 2007-06-14 13:02:55 -0700 | [diff] [blame] | 3187 | /* Alas, we support only Ethernet autoconfiguration. */ |
| 3188 | return; |
| 3189 | } |
| 3190 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3191 | idev = addrconf_add_dev(dev); |
Brian Haley | 64e724f | 2010-07-20 10:34:30 +0000 | [diff] [blame] | 3192 | if (IS_ERR(idev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3193 | return; |
| 3194 | |
Bjørn Mork | cc9da6c | 2015-12-16 16:44:38 +0100 | [diff] [blame] | 3195 | /* this device type has no EUI support */ |
| 3196 | if (dev->type == ARPHRD_NONE && |
| 3197 | idev->addr_gen_mode == IN6_ADDR_GEN_MODE_EUI64) |
| 3198 | idev->addr_gen_mode = IN6_ADDR_GEN_MODE_RANDOM; |
| 3199 | |
Jiri Pirko | bc91b0f | 2014-07-11 21:10:18 +0200 | [diff] [blame] | 3200 | addrconf_addr_gen(idev, false); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3201 | } |
| 3202 | |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 3203 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3204 | static void addrconf_sit_config(struct net_device *dev) |
| 3205 | { |
| 3206 | struct inet6_dev *idev; |
| 3207 | |
| 3208 | ASSERT_RTNL(); |
| 3209 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3210 | /* |
| 3211 | * Configure the tunnel with one of our IPv4 |
| 3212 | * addresses... we should configure all of |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3213 | * our v4 addrs in the tunnel |
| 3214 | */ |
| 3215 | |
Ian Morris | e5d08d7 | 2014-11-23 21:28:43 +0000 | [diff] [blame] | 3216 | idev = ipv6_find_idev(dev); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 3217 | if (!idev) { |
Joe Perches | 91df42b | 2012-05-15 14:11:54 +0000 | [diff] [blame] | 3218 | pr_debug("%s: add_dev failed\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3219 | return; |
| 3220 | } |
| 3221 | |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 3222 | if (dev->priv_flags & IFF_ISATAP) { |
Jiri Pirko | bc91b0f | 2014-07-11 21:10:18 +0200 | [diff] [blame] | 3223 | addrconf_addr_gen(idev, false); |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 3224 | return; |
| 3225 | } |
| 3226 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3227 | sit_add_v4_addrs(idev); |
| 3228 | |
Nicolas Dichtel | 62b54dd | 2012-10-01 23:19:14 +0000 | [diff] [blame] | 3229 | if (dev->flags&IFF_POINTOPOINT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3230 | addrconf_add_mroute(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3231 | } |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 3232 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3233 | |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 3234 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
stephen hemminger | aee80b5 | 2011-06-08 10:44:30 +0000 | [diff] [blame] | 3235 | static void addrconf_gre_config(struct net_device *dev) |
| 3236 | { |
| 3237 | struct inet6_dev *idev; |
stephen hemminger | aee80b5 | 2011-06-08 10:44:30 +0000 | [diff] [blame] | 3238 | |
stephen hemminger | aee80b5 | 2011-06-08 10:44:30 +0000 | [diff] [blame] | 3239 | ASSERT_RTNL(); |
| 3240 | |
Ian Morris | e5d08d7 | 2014-11-23 21:28:43 +0000 | [diff] [blame] | 3241 | idev = ipv6_find_idev(dev); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 3242 | if (!idev) { |
Joe Perches | 91df42b | 2012-05-15 14:11:54 +0000 | [diff] [blame] | 3243 | pr_debug("%s: add_dev failed\n", __func__); |
stephen hemminger | aee80b5 | 2011-06-08 10:44:30 +0000 | [diff] [blame] | 3244 | return; |
| 3245 | } |
| 3246 | |
Jiri Pirko | bc91b0f | 2014-07-11 21:10:18 +0200 | [diff] [blame] | 3247 | addrconf_addr_gen(idev, true); |
Hannes Frederic Sowa | d9e4ce6 | 2015-10-08 18:19:39 +0200 | [diff] [blame] | 3248 | if (dev->flags & IFF_POINTOPOINT) |
| 3249 | addrconf_add_mroute(dev); |
stephen hemminger | aee80b5 | 2011-06-08 10:44:30 +0000 | [diff] [blame] | 3250 | } |
| 3251 | #endif |
| 3252 | |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 3253 | static int fixup_permanent_addr(struct inet6_dev *idev, |
| 3254 | struct inet6_ifaddr *ifp) |
| 3255 | { |
| 3256 | if (!ifp->rt) { |
| 3257 | struct rt6_info *rt; |
| 3258 | |
| 3259 | rt = addrconf_dst_alloc(idev, &ifp->addr, false); |
| 3260 | if (unlikely(IS_ERR(rt))) |
| 3261 | return PTR_ERR(rt); |
| 3262 | |
| 3263 | ifp->rt = rt; |
| 3264 | } |
| 3265 | |
| 3266 | if (!(ifp->flags & IFA_F_NOPREFIXROUTE)) { |
| 3267 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, |
| 3268 | idev->dev, 0, 0); |
| 3269 | } |
| 3270 | |
| 3271 | addrconf_dad_start(ifp); |
| 3272 | |
| 3273 | return 0; |
| 3274 | } |
| 3275 | |
| 3276 | static void addrconf_permanent_addr(struct net_device *dev) |
| 3277 | { |
| 3278 | struct inet6_ifaddr *ifp, *tmp; |
| 3279 | struct inet6_dev *idev; |
| 3280 | |
| 3281 | idev = __in6_dev_get(dev); |
| 3282 | if (!idev) |
| 3283 | return; |
| 3284 | |
| 3285 | write_lock_bh(&idev->lock); |
| 3286 | |
| 3287 | list_for_each_entry_safe(ifp, tmp, &idev->addr_list, if_list) { |
| 3288 | if ((ifp->flags & IFA_F_PERMANENT) && |
| 3289 | fixup_permanent_addr(idev, ifp) < 0) { |
| 3290 | write_unlock_bh(&idev->lock); |
| 3291 | ipv6_del_addr(ifp); |
| 3292 | write_lock_bh(&idev->lock); |
| 3293 | |
| 3294 | net_info_ratelimited("%s: Failed to add prefix route for address %pI6c; dropping\n", |
| 3295 | idev->dev->name, &ifp->addr); |
| 3296 | } |
| 3297 | } |
| 3298 | |
| 3299 | write_unlock_bh(&idev->lock); |
| 3300 | } |
| 3301 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3302 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
Jiri Pirko | 351638e | 2013-05-28 01:30:21 +0000 | [diff] [blame] | 3303 | void *ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3304 | { |
Jiri Pirko | 351638e | 2013-05-28 01:30:21 +0000 | [diff] [blame] | 3305 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
David Ahern | 4f7f34e | 2016-04-07 11:10:41 -0700 | [diff] [blame] | 3306 | struct netdev_notifier_changeupper_info *info; |
Eric Dumazet | 748e2d9 | 2012-08-22 21:50:59 +0000 | [diff] [blame] | 3307 | struct inet6_dev *idev = __in6_dev_get(dev); |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 3308 | int run_pending = 0; |
Herbert Xu | b217d61 | 2007-07-30 17:04:52 -0700 | [diff] [blame] | 3309 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3310 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 3311 | switch (event) { |
YOSHIFUJI Hideaki | 45ba9dd | 2007-02-15 02:07:27 +0900 | [diff] [blame] | 3312 | case NETDEV_REGISTER: |
Herbert Xu | 74235a2 | 2007-06-14 13:02:55 -0700 | [diff] [blame] | 3313 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
YOSHIFUJI Hideaki | 45ba9dd | 2007-02-15 02:07:27 +0900 | [diff] [blame] | 3314 | idev = ipv6_add_dev(dev); |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 3315 | if (IS_ERR(idev)) |
| 3316 | return notifier_from_errno(PTR_ERR(idev)); |
YOSHIFUJI Hideaki | 45ba9dd | 2007-02-15 02:07:27 +0900 | [diff] [blame] | 3317 | } |
| 3318 | break; |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3319 | |
Alexander Duyck | b7b0b1d | 2015-10-26 11:06:33 -0700 | [diff] [blame] | 3320 | case NETDEV_CHANGEMTU: |
| 3321 | /* if MTU under IPV6_MIN_MTU stop IPv6 on this interface. */ |
| 3322 | if (dev->mtu < IPV6_MIN_MTU) { |
| 3323 | addrconf_ifdown(dev, 1); |
| 3324 | break; |
| 3325 | } |
| 3326 | |
| 3327 | if (idev) { |
| 3328 | rt6_mtu_change(dev, dev->mtu); |
| 3329 | idev->cnf.mtu6 = dev->mtu; |
| 3330 | break; |
| 3331 | } |
| 3332 | |
| 3333 | /* allocate new idev */ |
| 3334 | idev = ipv6_add_dev(dev); |
| 3335 | if (IS_ERR(idev)) |
| 3336 | break; |
| 3337 | |
| 3338 | /* device is still not ready */ |
| 3339 | if (!(idev->if_flags & IF_READY)) |
| 3340 | break; |
| 3341 | |
| 3342 | run_pending = 1; |
| 3343 | |
| 3344 | /* fall through */ |
| 3345 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3346 | case NETDEV_UP: |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3347 | case NETDEV_CHANGE: |
Jay Vosburgh | c2edacf | 2007-07-09 10:42:47 -0700 | [diff] [blame] | 3348 | if (dev->flags & IFF_SLAVE) |
| 3349 | break; |
| 3350 | |
WANG Cong | 3ce62a8 | 2014-09-11 15:07:16 -0700 | [diff] [blame] | 3351 | if (idev && idev->cnf.disable_ipv6) |
| 3352 | break; |
| 3353 | |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3354 | if (event == NETDEV_UP) { |
David Ahern | 38bd10c | 2016-04-21 20:56:12 -0700 | [diff] [blame] | 3355 | /* restore routes for permanent addresses */ |
| 3356 | addrconf_permanent_addr(dev); |
| 3357 | |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 3358 | if (!addrconf_qdisc_ok(dev)) { |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3359 | /* device is not ready yet. */ |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 3360 | pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n", |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3361 | dev->name); |
| 3362 | break; |
| 3363 | } |
Kristian Slavov | 9908104 | 2006-02-08 16:10:53 -0800 | [diff] [blame] | 3364 | |
Evgeniy Polyakov | d31c7b8 | 2007-11-30 23:36:08 +1100 | [diff] [blame] | 3365 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
| 3366 | idev = ipv6_add_dev(dev); |
| 3367 | |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 3368 | if (!IS_ERR_OR_NULL(idev)) { |
Kristian Slavov | 9908104 | 2006-02-08 16:10:53 -0800 | [diff] [blame] | 3369 | idev->if_flags |= IF_READY; |
Benjamin Thery | e3ec6cf | 2008-11-05 01:43:57 -0800 | [diff] [blame] | 3370 | run_pending = 1; |
| 3371 | } |
Alexander Duyck | b7b0b1d | 2015-10-26 11:06:33 -0700 | [diff] [blame] | 3372 | } else if (event == NETDEV_CHANGE) { |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 3373 | if (!addrconf_qdisc_ok(dev)) { |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3374 | /* device is still not ready. */ |
| 3375 | break; |
| 3376 | } |
| 3377 | |
| 3378 | if (idev) { |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3379 | if (idev->if_flags & IF_READY) |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3380 | /* device is already configured. */ |
| 3381 | break; |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3382 | idev->if_flags |= IF_READY; |
| 3383 | } |
| 3384 | |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 3385 | pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n", |
| 3386 | dev->name); |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3387 | |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 3388 | run_pending = 1; |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3389 | } |
| 3390 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 3391 | switch (dev->type) { |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 3392 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3393 | case ARPHRD_SIT: |
| 3394 | addrconf_sit_config(dev); |
| 3395 | break; |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 3396 | #endif |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 3397 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
stephen hemminger | aee80b5 | 2011-06-08 10:44:30 +0000 | [diff] [blame] | 3398 | case ARPHRD_IPGRE: |
| 3399 | addrconf_gre_config(dev); |
| 3400 | break; |
| 3401 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3402 | case ARPHRD_LOOPBACK: |
| 3403 | init_loopback(dev); |
| 3404 | break; |
| 3405 | |
| 3406 | default: |
| 3407 | addrconf_dev_config(dev); |
| 3408 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 3409 | } |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3410 | |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 3411 | if (!IS_ERR_OR_NULL(idev)) { |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 3412 | if (run_pending) |
| 3413 | addrconf_dad_run(idev); |
| 3414 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3415 | /* |
| 3416 | * If the MTU changed during the interface down, |
| 3417 | * when the interface up, the changed MTU must be |
| 3418 | * reflected in the idev as well as routers. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3419 | */ |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3420 | if (idev->cnf.mtu6 != dev->mtu && |
| 3421 | dev->mtu >= IPV6_MIN_MTU) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3422 | rt6_mtu_change(dev, dev->mtu); |
| 3423 | idev->cnf.mtu6 = dev->mtu; |
| 3424 | } |
| 3425 | idev->tstamp = jiffies; |
| 3426 | inet6_ifinfo_notify(RTM_NEWLINK, idev); |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3427 | |
| 3428 | /* |
| 3429 | * If the changed mtu during down is lower than |
| 3430 | * IPV6_MIN_MTU stop IPv6 on this interface. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3431 | */ |
| 3432 | if (dev->mtu < IPV6_MIN_MTU) |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3433 | addrconf_ifdown(dev, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3434 | } |
| 3435 | break; |
| 3436 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3437 | case NETDEV_DOWN: |
| 3438 | case NETDEV_UNREGISTER: |
| 3439 | /* |
| 3440 | * Remove all addresses from this interface. |
| 3441 | */ |
| 3442 | addrconf_ifdown(dev, event != NETDEV_DOWN); |
| 3443 | break; |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3444 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3445 | case NETDEV_CHANGENAME: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3446 | if (idev) { |
Stephen Hemminger | 5632c51 | 2007-04-28 21:16:39 -0700 | [diff] [blame] | 3447 | snmp6_unregister_dev(idev); |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 3448 | addrconf_sysctl_unregister(idev); |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 3449 | err = addrconf_sysctl_register(idev); |
Herbert Xu | b217d61 | 2007-07-30 17:04:52 -0700 | [diff] [blame] | 3450 | if (err) |
| 3451 | return notifier_from_errno(err); |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 3452 | err = snmp6_register_dev(idev); |
| 3453 | if (err) { |
| 3454 | addrconf_sysctl_unregister(idev); |
| 3455 | return notifier_from_errno(err); |
| 3456 | } |
Stephen Hemminger | 5632c51 | 2007-04-28 21:16:39 -0700 | [diff] [blame] | 3457 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3458 | break; |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3459 | |
Jiri Pirko | 93d9b7d | 2010-03-10 10:28:56 +0000 | [diff] [blame] | 3460 | case NETDEV_PRE_TYPE_CHANGE: |
| 3461 | case NETDEV_POST_TYPE_CHANGE: |
Andrew Lunn | 3ef0952 | 2015-12-03 21:12:32 +0100 | [diff] [blame] | 3462 | if (idev) |
| 3463 | addrconf_type_change(dev, event); |
Moni Shoua | 75c7850 | 2009-09-15 02:37:40 -0700 | [diff] [blame] | 3464 | break; |
David Ahern | 4f7f34e | 2016-04-07 11:10:41 -0700 | [diff] [blame] | 3465 | |
| 3466 | case NETDEV_CHANGEUPPER: |
| 3467 | info = ptr; |
| 3468 | |
| 3469 | /* flush all routes if dev is linked to or unlinked from |
| 3470 | * an L3 master device (e.g., VRF) |
| 3471 | */ |
| 3472 | if (info->upper_dev && netif_is_l3_master(info->upper_dev)) |
| 3473 | addrconf_ifdown(dev, 0); |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 3474 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3475 | |
| 3476 | return NOTIFY_OK; |
| 3477 | } |
| 3478 | |
| 3479 | /* |
| 3480 | * addrconf module should be notified of a device going up |
| 3481 | */ |
| 3482 | static struct notifier_block ipv6_dev_notf = { |
| 3483 | .notifier_call = addrconf_notify, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3484 | }; |
| 3485 | |
Jiri Pirko | 93d9b7d | 2010-03-10 10:28:56 +0000 | [diff] [blame] | 3486 | static void addrconf_type_change(struct net_device *dev, unsigned long event) |
Moni Shoua | 75c7850 | 2009-09-15 02:37:40 -0700 | [diff] [blame] | 3487 | { |
| 3488 | struct inet6_dev *idev; |
| 3489 | ASSERT_RTNL(); |
| 3490 | |
| 3491 | idev = __in6_dev_get(dev); |
| 3492 | |
Jiri Pirko | 93d9b7d | 2010-03-10 10:28:56 +0000 | [diff] [blame] | 3493 | if (event == NETDEV_POST_TYPE_CHANGE) |
Moni Shoua | 75c7850 | 2009-09-15 02:37:40 -0700 | [diff] [blame] | 3494 | ipv6_mc_remap(idev); |
Jiri Pirko | 93d9b7d | 2010-03-10 10:28:56 +0000 | [diff] [blame] | 3495 | else if (event == NETDEV_PRE_TYPE_CHANGE) |
Moni Shoua | 75c7850 | 2009-09-15 02:37:40 -0700 | [diff] [blame] | 3496 | ipv6_mc_unmap(idev); |
| 3497 | } |
| 3498 | |
David Ahern | 70af921 | 2016-04-08 12:01:21 -0700 | [diff] [blame] | 3499 | static bool addr_is_local(const struct in6_addr *addr) |
| 3500 | { |
| 3501 | return ipv6_addr_type(addr) & |
| 3502 | (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_LOOPBACK); |
| 3503 | } |
| 3504 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3505 | static int addrconf_ifdown(struct net_device *dev, int how) |
| 3506 | { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 3507 | struct net *net = dev_net(dev); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 3508 | struct inet6_dev *idev; |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 3509 | struct inet6_ifaddr *ifa, *tmp; |
| 3510 | struct list_head del_list; |
| 3511 | int _keep_addr; |
| 3512 | bool keep_addr; |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3513 | int state, i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3514 | |
| 3515 | ASSERT_RTNL(); |
| 3516 | |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3517 | rt6_ifdown(net, dev); |
| 3518 | neigh_ifdown(&nd_tbl, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3519 | |
| 3520 | idev = __in6_dev_get(dev); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 3521 | if (!idev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3522 | return -ENODEV; |
| 3523 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3524 | /* |
| 3525 | * Step 1: remove reference to ipv6 device from parent device. |
| 3526 | * Do not dev_put! |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3527 | */ |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 3528 | if (how) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3529 | idev->dead = 1; |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 3530 | |
| 3531 | /* protected by rtnl_lock */ |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 3532 | RCU_INIT_POINTER(dev->ip6_ptr, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3533 | |
| 3534 | /* Step 1.5: remove snmp6 entry */ |
| 3535 | snmp6_unregister_dev(idev); |
| 3536 | |
| 3537 | } |
| 3538 | |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 3539 | /* aggregate the system setting and interface setting */ |
| 3540 | _keep_addr = net->ipv6.devconf_all->keep_addr_on_down; |
| 3541 | if (!_keep_addr) |
| 3542 | _keep_addr = idev->cnf.keep_addr_on_down; |
| 3543 | |
| 3544 | /* combine the user config with event to determine if permanent |
| 3545 | * addresses are to be removed from address hash table |
| 3546 | */ |
Mike Manning | bc56163 | 2016-08-12 12:02:38 +0100 | [diff] [blame] | 3547 | keep_addr = !(how || _keep_addr <= 0 || idev->cnf.disable_ipv6); |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 3548 | |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3549 | /* Step 2: clear hash table */ |
| 3550 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
| 3551 | struct hlist_head *h = &inet6_addr_lst[i]; |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3552 | |
| 3553 | spin_lock_bh(&addrconf_hash_lock); |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 3554 | restart: |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 3555 | hlist_for_each_entry_rcu(ifa, h, addr_lst) { |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3556 | if (ifa->idev == idev) { |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3557 | addrconf_del_dad_work(ifa); |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 3558 | /* combined flag + permanent flag decide if |
| 3559 | * address is retained on a down event |
| 3560 | */ |
| 3561 | if (!keep_addr || |
David Ahern | 70af921 | 2016-04-08 12:01:21 -0700 | [diff] [blame] | 3562 | !(ifa->flags & IFA_F_PERMANENT) || |
| 3563 | addr_is_local(&ifa->addr)) { |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 3564 | hlist_del_init_rcu(&ifa->addr_lst); |
| 3565 | goto restart; |
| 3566 | } |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3567 | } |
| 3568 | } |
| 3569 | spin_unlock_bh(&addrconf_hash_lock); |
| 3570 | } |
| 3571 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3572 | write_lock_bh(&idev->lock); |
| 3573 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3574 | addrconf_del_rs_timer(idev); |
| 3575 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3576 | /* Step 2: clear flags for stateless addrconf */ |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 3577 | if (!how) |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3578 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3579 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3580 | /* Step 3: clear tempaddr list */ |
stephen hemminger | 372e6c8 | 2010-03-17 20:31:09 +0000 | [diff] [blame] | 3581 | while (!list_empty(&idev->tempaddr_list)) { |
| 3582 | ifa = list_first_entry(&idev->tempaddr_list, |
| 3583 | struct inet6_ifaddr, tmp_list); |
| 3584 | list_del(&ifa->tmp_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3585 | write_unlock_bh(&idev->lock); |
| 3586 | spin_lock_bh(&ifa->lock); |
| 3587 | |
| 3588 | if (ifa->ifpub) { |
| 3589 | in6_ifa_put(ifa->ifpub); |
| 3590 | ifa->ifpub = NULL; |
| 3591 | } |
| 3592 | spin_unlock_bh(&ifa->lock); |
| 3593 | in6_ifa_put(ifa); |
| 3594 | write_lock_bh(&idev->lock); |
| 3595 | } |
stephen hemminger | 8f37ada | 2010-03-03 08:19:59 +0000 | [diff] [blame] | 3596 | |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 3597 | /* re-combine the user config with event to determine if permanent |
| 3598 | * addresses are to be removed from the interface list |
| 3599 | */ |
Mike Manning | bc56163 | 2016-08-12 12:02:38 +0100 | [diff] [blame] | 3600 | keep_addr = (!how && _keep_addr > 0 && !idev->cnf.disable_ipv6); |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 3601 | |
| 3602 | INIT_LIST_HEAD(&del_list); |
| 3603 | list_for_each_entry_safe(ifa, tmp, &idev->addr_list, if_list) { |
David Ahern | 38bd10c | 2016-04-21 20:56:12 -0700 | [diff] [blame] | 3604 | struct rt6_info *rt = NULL; |
| 3605 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3606 | addrconf_del_dad_work(ifa); |
stephen hemminger | 84e8b80 | 2010-03-02 13:32:46 +0000 | [diff] [blame] | 3607 | |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3608 | write_unlock_bh(&idev->lock); |
Hannes Frederic Sowa | 8e8e676 | 2015-03-23 23:36:03 +0100 | [diff] [blame] | 3609 | spin_lock_bh(&ifa->lock); |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 3610 | |
David Ahern | 70af921 | 2016-04-08 12:01:21 -0700 | [diff] [blame] | 3611 | if (keep_addr && (ifa->flags & IFA_F_PERMANENT) && |
| 3612 | !addr_is_local(&ifa->addr)) { |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 3613 | /* set state to skip the notifier below */ |
| 3614 | state = INET6_IFADDR_STATE_DEAD; |
| 3615 | ifa->state = 0; |
| 3616 | if (!(ifa->flags & IFA_F_NODAD)) |
| 3617 | ifa->flags |= IFA_F_TENTATIVE; |
David Ahern | 38bd10c | 2016-04-21 20:56:12 -0700 | [diff] [blame] | 3618 | |
| 3619 | rt = ifa->rt; |
| 3620 | ifa->rt = NULL; |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 3621 | } else { |
| 3622 | state = ifa->state; |
| 3623 | ifa->state = INET6_IFADDR_STATE_DEAD; |
| 3624 | |
Wei Yongjun | c882219 | 2016-07-28 16:19:03 +0000 | [diff] [blame] | 3625 | list_move(&ifa->if_list, &del_list); |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 3626 | } |
| 3627 | |
Hannes Frederic Sowa | 8e8e676 | 2015-03-23 23:36:03 +0100 | [diff] [blame] | 3628 | spin_unlock_bh(&ifa->lock); |
stephen hemminger | 84e8b80 | 2010-03-02 13:32:46 +0000 | [diff] [blame] | 3629 | |
David Ahern | 38bd10c | 2016-04-21 20:56:12 -0700 | [diff] [blame] | 3630 | if (rt) |
| 3631 | ip6_del_rt(rt); |
| 3632 | |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3633 | if (state != INET6_IFADDR_STATE_DEAD) { |
| 3634 | __ipv6_ifa_notify(RTM_DELADDR, ifa); |
Cong Wang | f88c91d | 2013-04-14 23:18:43 +0800 | [diff] [blame] | 3635 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifa); |
Mike Manning | ea06f71 | 2016-07-22 18:32:11 +0100 | [diff] [blame] | 3636 | } else { |
| 3637 | if (idev->cnf.forwarding) |
| 3638 | addrconf_leave_anycast(ifa); |
| 3639 | addrconf_leave_solict(ifa->idev, &ifa->addr); |
stephen hemminger | 27bdb2a | 2010-04-12 05:41:32 +0000 | [diff] [blame] | 3640 | } |
stephen hemminger | 8f37ada | 2010-03-03 08:19:59 +0000 | [diff] [blame] | 3641 | |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3642 | write_lock_bh(&idev->lock); |
| 3643 | } |
stephen hemminger | 8f37ada | 2010-03-03 08:19:59 +0000 | [diff] [blame] | 3644 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3645 | write_unlock_bh(&idev->lock); |
| 3646 | |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 3647 | /* now clean up addresses to be removed */ |
| 3648 | while (!list_empty(&del_list)) { |
| 3649 | ifa = list_first_entry(&del_list, |
| 3650 | struct inet6_ifaddr, if_list); |
| 3651 | list_del(&ifa->if_list); |
| 3652 | |
| 3653 | in6_ifa_put(ifa); |
| 3654 | } |
| 3655 | |
Sabrina Dubroca | 381f4dca | 2014-09-10 23:23:02 +0200 | [diff] [blame] | 3656 | /* Step 5: Discard anycast and multicast list */ |
| 3657 | if (how) { |
| 3658 | ipv6_ac_destroy_dev(idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3659 | ipv6_mc_destroy_dev(idev); |
Sabrina Dubroca | 381f4dca | 2014-09-10 23:23:02 +0200 | [diff] [blame] | 3660 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3661 | ipv6_mc_down(idev); |
Sabrina Dubroca | 381f4dca | 2014-09-10 23:23:02 +0200 | [diff] [blame] | 3662 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3663 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3664 | idev->tstamp = jiffies; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3665 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3666 | /* Last: Shot the device (if unregistered) */ |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 3667 | if (how) { |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 3668 | addrconf_sysctl_unregister(idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3669 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
| 3670 | neigh_ifdown(&nd_tbl, dev); |
| 3671 | in6_dev_put(idev); |
| 3672 | } |
| 3673 | return 0; |
| 3674 | } |
| 3675 | |
| 3676 | static void addrconf_rs_timer(unsigned long data) |
| 3677 | { |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3678 | struct inet6_dev *idev = (struct inet6_dev *)data; |
Cong Wang | caf92bc | 2013-08-31 13:44:32 +0800 | [diff] [blame] | 3679 | struct net_device *dev = idev->dev; |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3680 | struct in6_addr lladdr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3681 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3682 | write_lock(&idev->lock); |
stephen hemminger | 5b2a195 | 2010-03-02 13:32:45 +0000 | [diff] [blame] | 3683 | if (idev->dead || !(idev->if_flags & IF_READY)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3684 | goto out; |
| 3685 | |
Shmulik Ladkani | 9ba2add | 2012-12-02 01:44:53 +0000 | [diff] [blame] | 3686 | if (!ipv6_accept_ra(idev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3687 | goto out; |
stephen hemminger | 5b2a195 | 2010-03-02 13:32:45 +0000 | [diff] [blame] | 3688 | |
| 3689 | /* Announcement received after solicitation was sent */ |
| 3690 | if (idev->if_flags & IF_RA_RCVD) |
| 3691 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3692 | |
Maciej Żenczykowski | bd11f07 | 2016-09-27 23:57:58 -0700 | [diff] [blame] | 3693 | if (idev->rs_probes++ < idev->cnf.rtr_solicits || idev->cnf.rtr_solicits < 0) { |
Cong Wang | caf92bc | 2013-08-31 13:44:32 +0800 | [diff] [blame] | 3694 | write_unlock(&idev->lock); |
| 3695 | if (!ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) |
| 3696 | ndisc_send_rs(dev, &lladdr, |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3697 | &in6addr_linklocal_allrouters); |
| 3698 | else |
Cong Wang | caf92bc | 2013-08-31 13:44:32 +0800 | [diff] [blame] | 3699 | goto put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3700 | |
Cong Wang | caf92bc | 2013-08-31 13:44:32 +0800 | [diff] [blame] | 3701 | write_lock(&idev->lock); |
Maciej Żenczykowski | bd11f07 | 2016-09-27 23:57:58 -0700 | [diff] [blame] | 3702 | idev->rs_interval = rfc3315_s14_backoff_update( |
| 3703 | idev->rs_interval, idev->cnf.rtr_solicit_max_interval); |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3704 | /* The wait after the last probe can be shorter */ |
| 3705 | addrconf_mod_rs_timer(idev, (idev->rs_probes == |
| 3706 | idev->cnf.rtr_solicits) ? |
| 3707 | idev->cnf.rtr_solicit_delay : |
Maciej Żenczykowski | bd11f07 | 2016-09-27 23:57:58 -0700 | [diff] [blame] | 3708 | idev->rs_interval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3709 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3710 | /* |
| 3711 | * Note: we do not support deprecated "all on-link" |
| 3712 | * assumption any longer. |
| 3713 | */ |
Joe Perches | 91df42b | 2012-05-15 14:11:54 +0000 | [diff] [blame] | 3714 | pr_debug("%s: no IPv6 routers present\n", idev->dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3715 | } |
| 3716 | |
| 3717 | out: |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3718 | write_unlock(&idev->lock); |
Cong Wang | caf92bc | 2013-08-31 13:44:32 +0800 | [diff] [blame] | 3719 | put: |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3720 | in6_dev_put(idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3721 | } |
| 3722 | |
| 3723 | /* |
| 3724 | * Duplicate Address Detection |
| 3725 | */ |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3726 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
| 3727 | { |
| 3728 | unsigned long rand_num; |
| 3729 | struct inet6_dev *idev = ifp->idev; |
| 3730 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 3731 | if (ifp->flags & IFA_F_OPTIMISTIC) |
| 3732 | rand_num = 0; |
| 3733 | else |
Aruna-Hewapathirane | 63862b5 | 2014-01-11 07:15:59 -0500 | [diff] [blame] | 3734 | rand_num = prandom_u32() % (idev->cnf.rtr_solicit_delay ? : 1); |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 3735 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3736 | ifp->dad_probes = idev->cnf.dad_transmits; |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3737 | addrconf_mod_dad_work(ifp, rand_num); |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3738 | } |
| 3739 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3740 | static void addrconf_dad_begin(struct inet6_ifaddr *ifp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3741 | { |
| 3742 | struct inet6_dev *idev = ifp->idev; |
| 3743 | struct net_device *dev = idev->dev; |
subashab@codeaurora.org | 16186a8 | 2016-02-02 02:11:10 +0000 | [diff] [blame] | 3744 | bool notify = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3745 | |
| 3746 | addrconf_join_solict(dev, &ifp->addr); |
| 3747 | |
Aruna-Hewapathirane | 63862b5 | 2014-01-11 07:15:59 -0500 | [diff] [blame] | 3748 | prandom_seed((__force u32) ifp->addr.s6_addr32[3]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3749 | |
| 3750 | read_lock_bh(&idev->lock); |
Herbert Xu | 622ccdf | 2010-05-18 15:56:06 -0700 | [diff] [blame] | 3751 | spin_lock(&ifp->lock); |
Herbert Xu | e9d3e08 | 2010-05-18 15:36:06 -0700 | [diff] [blame] | 3752 | if (ifp->state == INET6_IFADDR_STATE_DEAD) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3753 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3754 | |
| 3755 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 3756 | idev->cnf.accept_dad < 1 || |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 3757 | !(ifp->flags&IFA_F_TENTATIVE) || |
| 3758 | ifp->flags & IFA_F_NODAD) { |
Brian Haley | cc411d0 | 2009-09-09 14:41:32 +0000 | [diff] [blame] | 3759 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 3760 | spin_unlock(&ifp->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3761 | read_unlock_bh(&idev->lock); |
| 3762 | |
| 3763 | addrconf_dad_completed(ifp); |
| 3764 | return; |
| 3765 | } |
| 3766 | |
YOSHIFUJI Hideaki | 6732bad | 2005-12-27 13:35:15 -0800 | [diff] [blame] | 3767 | if (!(idev->if_flags & IF_READY)) { |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 3768 | spin_unlock(&ifp->lock); |
YOSHIFUJI Hideaki | 6732bad | 2005-12-27 13:35:15 -0800 | [diff] [blame] | 3769 | read_unlock_bh(&idev->lock); |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3770 | /* |
Masatake YAMATO | 590a988 | 2009-06-09 10:41:12 +0900 | [diff] [blame] | 3771 | * If the device is not ready: |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3772 | * - keep it tentative if it is a permanent address. |
| 3773 | * - otherwise, kill it. |
| 3774 | */ |
| 3775 | in6_ifa_hold(ifp); |
Brian Haley | cc411d0 | 2009-09-09 14:41:32 +0000 | [diff] [blame] | 3776 | addrconf_dad_stop(ifp, 0); |
YOSHIFUJI Hideaki | 6732bad | 2005-12-27 13:35:15 -0800 | [diff] [blame] | 3777 | return; |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3778 | } |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 3779 | |
| 3780 | /* |
| 3781 | * Optimistic nodes can start receiving |
| 3782 | * Frames right away |
| 3783 | */ |
Erik Kline | 7fd2561 | 2014-10-28 18:11:14 +0900 | [diff] [blame] | 3784 | if (ifp->flags & IFA_F_OPTIMISTIC) { |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 3785 | ip6_ins_rt(ifp->rt); |
Erik Kline | 7fd2561 | 2014-10-28 18:11:14 +0900 | [diff] [blame] | 3786 | if (ipv6_use_optimistic_addr(idev)) { |
| 3787 | /* Because optimistic nodes can use this address, |
| 3788 | * notify listeners. If DAD fails, RTM_DELADDR is sent. |
| 3789 | */ |
subashab@codeaurora.org | 16186a8 | 2016-02-02 02:11:10 +0000 | [diff] [blame] | 3790 | notify = true; |
Erik Kline | 7fd2561 | 2014-10-28 18:11:14 +0900 | [diff] [blame] | 3791 | } |
| 3792 | } |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 3793 | |
YOSHIFUJI Hideaki | 6732bad | 2005-12-27 13:35:15 -0800 | [diff] [blame] | 3794 | addrconf_dad_kick(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3795 | out: |
Herbert Xu | 622ccdf | 2010-05-18 15:56:06 -0700 | [diff] [blame] | 3796 | spin_unlock(&ifp->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3797 | read_unlock_bh(&idev->lock); |
subashab@codeaurora.org | 16186a8 | 2016-02-02 02:11:10 +0000 | [diff] [blame] | 3798 | if (notify) |
| 3799 | ipv6_ifa_notify(RTM_NEWADDR, ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3800 | } |
| 3801 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3802 | static void addrconf_dad_start(struct inet6_ifaddr *ifp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3803 | { |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3804 | bool begin_dad = false; |
| 3805 | |
Hannes Frederic Sowa | 8e8e676 | 2015-03-23 23:36:03 +0100 | [diff] [blame] | 3806 | spin_lock_bh(&ifp->lock); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3807 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
| 3808 | ifp->state = INET6_IFADDR_STATE_PREDAD; |
| 3809 | begin_dad = true; |
| 3810 | } |
Hannes Frederic Sowa | 8e8e676 | 2015-03-23 23:36:03 +0100 | [diff] [blame] | 3811 | spin_unlock_bh(&ifp->lock); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3812 | |
| 3813 | if (begin_dad) |
| 3814 | addrconf_mod_dad_work(ifp, 0); |
| 3815 | } |
| 3816 | |
| 3817 | static void addrconf_dad_work(struct work_struct *w) |
| 3818 | { |
| 3819 | struct inet6_ifaddr *ifp = container_of(to_delayed_work(w), |
| 3820 | struct inet6_ifaddr, |
| 3821 | dad_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3822 | struct inet6_dev *idev = ifp->idev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3823 | struct in6_addr mcaddr; |
Mike Manning | 85b51b1 | 2016-08-18 14:39:40 +0100 | [diff] [blame] | 3824 | bool disable_ipv6 = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3825 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3826 | enum { |
| 3827 | DAD_PROCESS, |
| 3828 | DAD_BEGIN, |
| 3829 | DAD_ABORT, |
| 3830 | } action = DAD_PROCESS; |
| 3831 | |
| 3832 | rtnl_lock(); |
| 3833 | |
Hannes Frederic Sowa | 8e8e676 | 2015-03-23 23:36:03 +0100 | [diff] [blame] | 3834 | spin_lock_bh(&ifp->lock); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3835 | if (ifp->state == INET6_IFADDR_STATE_PREDAD) { |
| 3836 | action = DAD_BEGIN; |
| 3837 | ifp->state = INET6_IFADDR_STATE_DAD; |
| 3838 | } else if (ifp->state == INET6_IFADDR_STATE_ERRDAD) { |
| 3839 | action = DAD_ABORT; |
| 3840 | ifp->state = INET6_IFADDR_STATE_POSTDAD; |
Mike Manning | 85b51b1 | 2016-08-18 14:39:40 +0100 | [diff] [blame] | 3841 | |
| 3842 | if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6 && |
| 3843 | !(ifp->flags & IFA_F_STABLE_PRIVACY)) { |
| 3844 | struct in6_addr addr; |
| 3845 | |
| 3846 | addr.s6_addr32[0] = htonl(0xfe800000); |
| 3847 | addr.s6_addr32[1] = 0; |
| 3848 | |
| 3849 | if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && |
| 3850 | ipv6_addr_equal(&ifp->addr, &addr)) { |
| 3851 | /* DAD failed for link-local based on MAC */ |
| 3852 | idev->cnf.disable_ipv6 = 1; |
| 3853 | |
| 3854 | pr_info("%s: IPv6 being disabled!\n", |
| 3855 | ifp->idev->dev->name); |
| 3856 | disable_ipv6 = true; |
| 3857 | } |
| 3858 | } |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3859 | } |
Hannes Frederic Sowa | 8e8e676 | 2015-03-23 23:36:03 +0100 | [diff] [blame] | 3860 | spin_unlock_bh(&ifp->lock); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3861 | |
| 3862 | if (action == DAD_BEGIN) { |
| 3863 | addrconf_dad_begin(ifp); |
| 3864 | goto out; |
| 3865 | } else if (action == DAD_ABORT) { |
Wei Yongjun | 751eb6b | 2016-09-05 16:06:31 +0800 | [diff] [blame] | 3866 | in6_ifa_hold(ifp); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3867 | addrconf_dad_stop(ifp, 1); |
Mike Manning | 85b51b1 | 2016-08-18 14:39:40 +0100 | [diff] [blame] | 3868 | if (disable_ipv6) |
| 3869 | addrconf_ifdown(idev->dev, 0); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3870 | goto out; |
| 3871 | } |
| 3872 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3873 | if (!ifp->dad_probes && addrconf_dad_end(ifp)) |
Herbert Xu | f2344a1 | 2010-05-18 15:55:27 -0700 | [diff] [blame] | 3874 | goto out; |
| 3875 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3876 | write_lock_bh(&idev->lock); |
stephen hemminger | 122e451 | 2010-03-02 13:32:44 +0000 | [diff] [blame] | 3877 | if (idev->dead || !(idev->if_flags & IF_READY)) { |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3878 | write_unlock_bh(&idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3879 | goto out; |
| 3880 | } |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 3881 | |
| 3882 | spin_lock(&ifp->lock); |
Herbert Xu | 622ccdf | 2010-05-18 15:56:06 -0700 | [diff] [blame] | 3883 | if (ifp->state == INET6_IFADDR_STATE_DEAD) { |
| 3884 | spin_unlock(&ifp->lock); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3885 | write_unlock_bh(&idev->lock); |
Herbert Xu | 622ccdf | 2010-05-18 15:56:06 -0700 | [diff] [blame] | 3886 | goto out; |
| 3887 | } |
| 3888 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3889 | if (ifp->dad_probes == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3890 | /* |
| 3891 | * DAD was successful |
| 3892 | */ |
| 3893 | |
Brian Haley | cc411d0 | 2009-09-09 14:41:32 +0000 | [diff] [blame] | 3894 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 3895 | spin_unlock(&ifp->lock); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3896 | write_unlock_bh(&idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3897 | |
| 3898 | addrconf_dad_completed(ifp); |
| 3899 | |
| 3900 | goto out; |
| 3901 | } |
| 3902 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3903 | ifp->dad_probes--; |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3904 | addrconf_mod_dad_work(ifp, |
| 3905 | NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME)); |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 3906 | spin_unlock(&ifp->lock); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3907 | write_unlock_bh(&idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3908 | |
| 3909 | /* send a neighbour solicitation for our addr */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3910 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
Nicolas Dichtel | 304d888 | 2015-11-27 18:17:05 +0100 | [diff] [blame] | 3911 | ndisc_send_ns(ifp->idev->dev, &ifp->addr, &mcaddr, &in6addr_any); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3912 | out: |
| 3913 | in6_ifa_put(ifp); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3914 | rtnl_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3915 | } |
| 3916 | |
Hannes Frederic Sowa | 11ffff7 | 2014-01-16 20:13:04 +0100 | [diff] [blame] | 3917 | /* ifp->idev must be at least read locked */ |
| 3918 | static bool ipv6_lonely_lladdr(struct inet6_ifaddr *ifp) |
| 3919 | { |
| 3920 | struct inet6_ifaddr *ifpiter; |
| 3921 | struct inet6_dev *idev = ifp->idev; |
| 3922 | |
Hannes Frederic Sowa | 602582c | 2014-01-19 21:58:19 +0100 | [diff] [blame] | 3923 | list_for_each_entry_reverse(ifpiter, &idev->addr_list, if_list) { |
| 3924 | if (ifpiter->scope > IFA_LINK) |
| 3925 | break; |
Hannes Frederic Sowa | 11ffff7 | 2014-01-16 20:13:04 +0100 | [diff] [blame] | 3926 | if (ifp != ifpiter && ifpiter->scope == IFA_LINK && |
| 3927 | (ifpiter->flags & (IFA_F_PERMANENT|IFA_F_TENTATIVE| |
| 3928 | IFA_F_OPTIMISTIC|IFA_F_DADFAILED)) == |
| 3929 | IFA_F_PERMANENT) |
| 3930 | return false; |
| 3931 | } |
| 3932 | return true; |
| 3933 | } |
| 3934 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3935 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) |
| 3936 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 3937 | struct net_device *dev = ifp->idev->dev; |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3938 | struct in6_addr lladdr; |
Hannes Frederic Sowa | b173ee4 | 2013-06-27 00:07:01 +0200 | [diff] [blame] | 3939 | bool send_rs, send_mld; |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3940 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 3941 | addrconf_del_dad_work(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3942 | |
| 3943 | /* |
| 3944 | * Configure the address for reception. Now it is valid. |
| 3945 | */ |
| 3946 | |
| 3947 | ipv6_ifa_notify(RTM_NEWADDR, ifp); |
| 3948 | |
Tore Anderson | 026359b | 2011-08-28 23:47:33 +0000 | [diff] [blame] | 3949 | /* If added prefix is link local and we are prepared to process |
| 3950 | router advertisements, start sending router solicitations. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3951 | */ |
| 3952 | |
Hannes Frederic Sowa | 1ec047e | 2013-06-27 00:06:56 +0200 | [diff] [blame] | 3953 | read_lock_bh(&ifp->idev->lock); |
Hannes Frederic Sowa | 11ffff7 | 2014-01-16 20:13:04 +0100 | [diff] [blame] | 3954 | send_mld = ifp->scope == IFA_LINK && ipv6_lonely_lladdr(ifp); |
Hannes Frederic Sowa | b173ee4 | 2013-06-27 00:07:01 +0200 | [diff] [blame] | 3955 | send_rs = send_mld && |
| 3956 | ipv6_accept_ra(ifp->idev) && |
Maciej Żenczykowski | bd11f07 | 2016-09-27 23:57:58 -0700 | [diff] [blame] | 3957 | ifp->idev->cnf.rtr_solicits != 0 && |
Hannes Frederic Sowa | b173ee4 | 2013-06-27 00:07:01 +0200 | [diff] [blame] | 3958 | (dev->flags&IFF_LOOPBACK) == 0; |
Hannes Frederic Sowa | 1ec047e | 2013-06-27 00:06:56 +0200 | [diff] [blame] | 3959 | read_unlock_bh(&ifp->idev->lock); |
| 3960 | |
Hannes Frederic Sowa | b173ee4 | 2013-06-27 00:07:01 +0200 | [diff] [blame] | 3961 | /* While dad is in progress mld report's source address is in6_addrany. |
| 3962 | * Resend with proper ll now. |
| 3963 | */ |
| 3964 | if (send_mld) |
| 3965 | ipv6_mc_dad_complete(ifp->idev); |
| 3966 | |
Hannes Frederic Sowa | 1ec047e | 2013-06-27 00:06:56 +0200 | [diff] [blame] | 3967 | if (send_rs) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3968 | /* |
| 3969 | * If a host as already performed a random delay |
| 3970 | * [...] as part of DAD [...] there is no need |
| 3971 | * to delay again before sending the first RS |
| 3972 | */ |
Hannes Frederic Sowa | 1ec047e | 2013-06-27 00:06:56 +0200 | [diff] [blame] | 3973 | if (ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3974 | return; |
Hannes Frederic Sowa | 1ec047e | 2013-06-27 00:06:56 +0200 | [diff] [blame] | 3975 | ndisc_send_rs(dev, &lladdr, &in6addr_linklocal_allrouters); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3976 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3977 | write_lock_bh(&ifp->idev->lock); |
| 3978 | spin_lock(&ifp->lock); |
Maciej Żenczykowski | bd11f07 | 2016-09-27 23:57:58 -0700 | [diff] [blame] | 3979 | ifp->idev->rs_interval = rfc3315_s14_backoff_init( |
| 3980 | ifp->idev->cnf.rtr_solicit_interval); |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3981 | ifp->idev->rs_probes = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3982 | ifp->idev->if_flags |= IF_RS_SENT; |
Maciej Żenczykowski | bd11f07 | 2016-09-27 23:57:58 -0700 | [diff] [blame] | 3983 | addrconf_mod_rs_timer(ifp->idev, ifp->idev->rs_interval); |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3984 | spin_unlock(&ifp->lock); |
| 3985 | write_unlock_bh(&ifp->idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3986 | } |
| 3987 | } |
| 3988 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 3989 | static void addrconf_dad_run(struct inet6_dev *idev) |
| 3990 | { |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 3991 | struct inet6_ifaddr *ifp; |
| 3992 | |
| 3993 | read_lock_bh(&idev->lock); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 3994 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 3995 | spin_lock(&ifp->lock); |
Herbert Xu | f2344a1 | 2010-05-18 15:55:27 -0700 | [diff] [blame] | 3996 | if (ifp->flags & IFA_F_TENTATIVE && |
| 3997 | ifp->state == INET6_IFADDR_STATE_DAD) |
| 3998 | addrconf_dad_kick(ifp); |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 3999 | spin_unlock(&ifp->lock); |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 4000 | } |
| 4001 | read_unlock_bh(&idev->lock); |
| 4002 | } |
| 4003 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4004 | #ifdef CONFIG_PROC_FS |
| 4005 | struct if6_iter_state { |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 4006 | struct seq_net_private p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4007 | int bucket; |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 4008 | int offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4009 | }; |
| 4010 | |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 4011 | 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] | 4012 | { |
| 4013 | struct inet6_ifaddr *ifa = NULL; |
| 4014 | struct if6_iter_state *state = seq->private; |
YOSHIFUJI Hideaki | 1218854 | 2008-03-26 02:36:06 +0900 | [diff] [blame] | 4015 | struct net *net = seq_file_net(seq); |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 4016 | int p = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4017 | |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 4018 | /* initial bucket if pos is 0 */ |
| 4019 | if (pos == 0) { |
| 4020 | state->bucket = 0; |
| 4021 | state->offset = 0; |
| 4022 | } |
| 4023 | |
| 4024 | for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 4025 | hlist_for_each_entry_rcu_bh(ifa, &inet6_addr_lst[state->bucket], |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 4026 | addr_lst) { |
Eric Dumazet | 9f0d3c2 | 2012-10-16 07:37:27 +0000 | [diff] [blame] | 4027 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
| 4028 | continue; |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 4029 | /* sync with offset */ |
| 4030 | if (p < state->offset) { |
| 4031 | p++; |
| 4032 | continue; |
| 4033 | } |
| 4034 | state->offset++; |
Eric Dumazet | 9f0d3c2 | 2012-10-16 07:37:27 +0000 | [diff] [blame] | 4035 | return ifa; |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 4036 | } |
| 4037 | |
| 4038 | /* prepare for next bucket */ |
| 4039 | state->offset = 0; |
| 4040 | p = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4041 | } |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 4042 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4043 | } |
| 4044 | |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 4045 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, |
| 4046 | struct inet6_ifaddr *ifa) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4047 | { |
| 4048 | struct if6_iter_state *state = seq->private; |
YOSHIFUJI Hideaki | 1218854 | 2008-03-26 02:36:06 +0900 | [diff] [blame] | 4049 | struct net *net = seq_file_net(seq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4050 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 4051 | hlist_for_each_entry_continue_rcu_bh(ifa, addr_lst) { |
Eric Dumazet | 9f0d3c2 | 2012-10-16 07:37:27 +0000 | [diff] [blame] | 4052 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
| 4053 | continue; |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 4054 | state->offset++; |
Eric Dumazet | 9f0d3c2 | 2012-10-16 07:37:27 +0000 | [diff] [blame] | 4055 | return ifa; |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 4056 | } |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 4057 | |
| 4058 | while (++state->bucket < IN6_ADDR_HSIZE) { |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 4059 | state->offset = 0; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 4060 | hlist_for_each_entry_rcu_bh(ifa, |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 4061 | &inet6_addr_lst[state->bucket], addr_lst) { |
Eric Dumazet | 9f0d3c2 | 2012-10-16 07:37:27 +0000 | [diff] [blame] | 4062 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
| 4063 | continue; |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 4064 | state->offset++; |
Eric Dumazet | 9f0d3c2 | 2012-10-16 07:37:27 +0000 | [diff] [blame] | 4065 | return ifa; |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 4066 | } |
| 4067 | } |
| 4068 | |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 4069 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4070 | } |
| 4071 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4072 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) |
Eric Dumazet | 4f70ecc | 2010-05-03 10:50:14 +0000 | [diff] [blame] | 4073 | __acquires(rcu_bh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4074 | { |
stephen hemminger | 5c578aed | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 4075 | rcu_read_lock_bh(); |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 4076 | return if6_get_first(seq, *pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4077 | } |
| 4078 | |
| 4079 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 4080 | { |
| 4081 | struct inet6_ifaddr *ifa; |
| 4082 | |
| 4083 | ifa = if6_get_next(seq, v); |
| 4084 | ++*pos; |
| 4085 | return ifa; |
| 4086 | } |
| 4087 | |
| 4088 | static void if6_seq_stop(struct seq_file *seq, void *v) |
Eric Dumazet | 4f70ecc | 2010-05-03 10:50:14 +0000 | [diff] [blame] | 4089 | __releases(rcu_bh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4090 | { |
stephen hemminger | 5c578aed | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 4091 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4092 | } |
| 4093 | |
| 4094 | static int if6_seq_show(struct seq_file *seq, void *v) |
| 4095 | { |
| 4096 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; |
Jiri Pirko | 971a351 | 2013-12-10 13:56:29 +0100 | [diff] [blame] | 4097 | seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", |
Harvey Harrison | b071195 | 2008-10-28 16:05:40 -0700 | [diff] [blame] | 4098 | &ifp->addr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4099 | ifp->idev->dev->ifindex, |
| 4100 | ifp->prefix_len, |
| 4101 | ifp->scope, |
Jiri Pirko | 971a351 | 2013-12-10 13:56:29 +0100 | [diff] [blame] | 4102 | (u8) ifp->flags, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4103 | ifp->idev->dev->name); |
| 4104 | return 0; |
| 4105 | } |
| 4106 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 4107 | static const struct seq_operations if6_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4108 | .start = if6_seq_start, |
| 4109 | .next = if6_seq_next, |
| 4110 | .show = if6_seq_show, |
| 4111 | .stop = if6_seq_stop, |
| 4112 | }; |
| 4113 | |
| 4114 | static int if6_seq_open(struct inode *inode, struct file *file) |
| 4115 | { |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 4116 | return seq_open_net(inode, file, &if6_seq_ops, |
| 4117 | sizeof(struct if6_iter_state)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4118 | } |
| 4119 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 4120 | static const struct file_operations if6_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4121 | .owner = THIS_MODULE, |
| 4122 | .open = if6_seq_open, |
| 4123 | .read = seq_read, |
| 4124 | .llseek = seq_lseek, |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 4125 | .release = seq_release_net, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4126 | }; |
| 4127 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 4128 | static int __net_init if6_proc_net_init(struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4129 | { |
Gao feng | d4beaa6 | 2013-02-18 01:34:54 +0000 | [diff] [blame] | 4130 | if (!proc_create("if_inet6", S_IRUGO, net->proc_net, &if6_fops)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4131 | return -ENOMEM; |
| 4132 | return 0; |
| 4133 | } |
| 4134 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 4135 | static void __net_exit if6_proc_net_exit(struct net *net) |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 4136 | { |
Gao feng | ece31ff | 2013-02-18 01:34:56 +0000 | [diff] [blame] | 4137 | remove_proc_entry("if_inet6", net->proc_net); |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 4138 | } |
| 4139 | |
| 4140 | static struct pernet_operations if6_proc_net_ops = { |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 4141 | .init = if6_proc_net_init, |
| 4142 | .exit = if6_proc_net_exit, |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 4143 | }; |
| 4144 | |
| 4145 | int __init if6_proc_init(void) |
| 4146 | { |
| 4147 | return register_pernet_subsys(&if6_proc_net_ops); |
| 4148 | } |
| 4149 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4150 | void if6_proc_exit(void) |
| 4151 | { |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 4152 | unregister_pernet_subsys(&if6_proc_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4153 | } |
| 4154 | #endif /* CONFIG_PROC_FS */ |
| 4155 | |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 4156 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 4157 | /* Check if address is a home address configured on any interface. */ |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 4158 | 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] | 4159 | { |
| 4160 | int ret = 0; |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 4161 | struct inet6_ifaddr *ifp = NULL; |
Eric Dumazet | ddbe503 | 2012-07-18 08:11:12 +0000 | [diff] [blame] | 4162 | unsigned int hash = inet6_addr_hash(addr); |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 4163 | |
stephen hemminger | 5c578aed | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 4164 | rcu_read_lock_bh(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 4165 | 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] | 4166 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
Daniel Lezcano | 389f661 | 2008-01-10 22:44:40 -0800 | [diff] [blame] | 4167 | continue; |
YOSHIFUJI Hideaki | caad295 | 2008-04-10 15:42:07 +0900 | [diff] [blame] | 4168 | if (ipv6_addr_equal(&ifp->addr, addr) && |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 4169 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
| 4170 | ret = 1; |
| 4171 | break; |
| 4172 | } |
| 4173 | } |
stephen hemminger | 5c578aed | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 4174 | rcu_read_unlock_bh(); |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 4175 | return ret; |
| 4176 | } |
| 4177 | #endif |
| 4178 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4179 | /* |
| 4180 | * Periodic address status verification |
| 4181 | */ |
| 4182 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 4183 | static void addrconf_verify_rtnl(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4184 | { |
YOSHIFUJI Hideaki | b2db756 | 2010-03-20 16:11:12 -0700 | [diff] [blame] | 4185 | unsigned long now, next, next_sec, next_sched; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4186 | struct inet6_ifaddr *ifp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4187 | int i; |
| 4188 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 4189 | ASSERT_RTNL(); |
| 4190 | |
stephen hemminger | 5c578aed | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 4191 | rcu_read_lock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4192 | now = jiffies; |
YOSHIFUJI Hideaki | b2db756 | 2010-03-20 16:11:12 -0700 | [diff] [blame] | 4193 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4194 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 4195 | cancel_delayed_work(&addr_chk_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4196 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 4197 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4198 | restart: |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 4199 | 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] | 4200 | unsigned long age; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4201 | |
Yasushi Asano | fad8da3 | 2013-12-31 12:04:19 +0900 | [diff] [blame] | 4202 | /* When setting preferred_lft to a value not zero or |
| 4203 | * infinity, while valid_lft is infinity |
| 4204 | * IFA_F_PERMANENT has a non-infinity life time. |
| 4205 | */ |
| 4206 | if ((ifp->flags & IFA_F_PERMANENT) && |
| 4207 | (ifp->prefered_lft == INFINITY_LIFE_TIME)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4208 | continue; |
| 4209 | |
| 4210 | spin_lock(&ifp->lock); |
YOSHIFUJI Hideaki | b2db756 | 2010-03-20 16:11:12 -0700 | [diff] [blame] | 4211 | /* We try to batch several events at once. */ |
| 4212 | age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4213 | |
YOSHIFUJI Hideaki | 8f27ebb | 2006-07-28 18:12:11 +0900 | [diff] [blame] | 4214 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
| 4215 | age >= ifp->valid_lft) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4216 | spin_unlock(&ifp->lock); |
| 4217 | in6_ifa_hold(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4218 | ipv6_del_addr(ifp); |
| 4219 | goto restart; |
YOSHIFUJI Hideaki | 8f27ebb | 2006-07-28 18:12:11 +0900 | [diff] [blame] | 4220 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
| 4221 | spin_unlock(&ifp->lock); |
| 4222 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4223 | } else if (age >= ifp->prefered_lft) { |
Brian Haley | a1ed052 | 2009-07-02 07:10:52 +0000 | [diff] [blame] | 4224 | /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4225 | int deprecate = 0; |
| 4226 | |
| 4227 | if (!(ifp->flags&IFA_F_DEPRECATED)) { |
| 4228 | deprecate = 1; |
| 4229 | ifp->flags |= IFA_F_DEPRECATED; |
| 4230 | } |
| 4231 | |
Yasushi Asano | fad8da3 | 2013-12-31 12:04:19 +0900 | [diff] [blame] | 4232 | if ((ifp->valid_lft != INFINITY_LIFE_TIME) && |
| 4233 | (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4234 | next = ifp->tstamp + ifp->valid_lft * HZ; |
| 4235 | |
| 4236 | spin_unlock(&ifp->lock); |
| 4237 | |
| 4238 | if (deprecate) { |
| 4239 | in6_ifa_hold(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4240 | |
| 4241 | ipv6_ifa_notify(0, ifp); |
| 4242 | in6_ifa_put(ifp); |
| 4243 | goto restart; |
| 4244 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4245 | } else if ((ifp->flags&IFA_F_TEMPORARY) && |
| 4246 | !(ifp->flags&IFA_F_TENTATIVE)) { |
stephen hemminger | 88949cf | 2010-03-17 20:31:17 +0000 | [diff] [blame] | 4247 | unsigned long regen_advance = ifp->idev->cnf.regen_max_retry * |
| 4248 | ifp->idev->cnf.dad_transmits * |
Jiri Pirko | 1f9248e | 2013-12-07 19:26:53 +0100 | [diff] [blame] | 4249 | NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME) / HZ; |
stephen hemminger | 88949cf | 2010-03-17 20:31:17 +0000 | [diff] [blame] | 4250 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4251 | if (age >= ifp->prefered_lft - regen_advance) { |
| 4252 | struct inet6_ifaddr *ifpub = ifp->ifpub; |
| 4253 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) |
| 4254 | next = ifp->tstamp + ifp->prefered_lft * HZ; |
| 4255 | if (!ifp->regen_count && ifpub) { |
| 4256 | ifp->regen_count++; |
| 4257 | in6_ifa_hold(ifp); |
| 4258 | in6_ifa_hold(ifpub); |
| 4259 | spin_unlock(&ifp->lock); |
stephen hemminger | 5c578aed | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 4260 | |
Hiroyuki YAMAMORI | 291d809 | 2005-12-23 11:24:05 -0800 | [diff] [blame] | 4261 | spin_lock(&ifpub->lock); |
| 4262 | ifpub->regen_count = 0; |
| 4263 | spin_unlock(&ifpub->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4264 | ipv6_create_tempaddr(ifpub, ifp); |
| 4265 | in6_ifa_put(ifpub); |
| 4266 | in6_ifa_put(ifp); |
| 4267 | goto restart; |
| 4268 | } |
| 4269 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) |
| 4270 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; |
| 4271 | spin_unlock(&ifp->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4272 | } else { |
| 4273 | /* ifp->prefered_lft <= ifp->valid_lft */ |
| 4274 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) |
| 4275 | next = ifp->tstamp + ifp->prefered_lft * HZ; |
| 4276 | spin_unlock(&ifp->lock); |
| 4277 | } |
| 4278 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4279 | } |
| 4280 | |
YOSHIFUJI Hideaki | b2db756 | 2010-03-20 16:11:12 -0700 | [diff] [blame] | 4281 | next_sec = round_jiffies_up(next); |
| 4282 | next_sched = next; |
| 4283 | |
| 4284 | /* If rounded timeout is accurate enough, accept it. */ |
| 4285 | if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) |
| 4286 | next_sched = next_sec; |
| 4287 | |
| 4288 | /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ |
| 4289 | if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX)) |
| 4290 | next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX; |
| 4291 | |
dingtianhong | ba3542e | 2013-08-17 10:27:04 +0800 | [diff] [blame] | 4292 | ADBG(KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n", |
| 4293 | now, next, next_sec, next_sched); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 4294 | mod_delayed_work(addrconf_wq, &addr_chk_work, next_sched - now); |
stephen hemminger | 5c578aed | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 4295 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4296 | } |
| 4297 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 4298 | static void addrconf_verify_work(struct work_struct *w) |
| 4299 | { |
| 4300 | rtnl_lock(); |
| 4301 | addrconf_verify_rtnl(); |
| 4302 | rtnl_unlock(); |
| 4303 | } |
| 4304 | |
| 4305 | static void addrconf_verify(void) |
| 4306 | { |
| 4307 | mod_delayed_work(addrconf_wq, &addr_chk_work, 0); |
| 4308 | } |
| 4309 | |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4310 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local, |
| 4311 | struct in6_addr **peer_pfx) |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 4312 | { |
| 4313 | struct in6_addr *pfx = NULL; |
| 4314 | |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4315 | *peer_pfx = NULL; |
| 4316 | |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 4317 | if (addr) |
| 4318 | pfx = nla_data(addr); |
| 4319 | |
| 4320 | if (local) { |
| 4321 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4322 | *peer_pfx = pfx; |
| 4323 | pfx = nla_data(local); |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 4324 | } |
| 4325 | |
| 4326 | return pfx; |
| 4327 | } |
| 4328 | |
Patrick McHardy | ef7c79e | 2007-06-05 12:38:30 -0700 | [diff] [blame] | 4329 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 4330 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
| 4331 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, |
| 4332 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, |
Jiri Pirko | 479840f | 2013-12-06 09:45:21 +0100 | [diff] [blame] | 4333 | [IFA_FLAGS] = { .len = sizeof(u32) }, |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 4334 | }; |
| 4335 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4336 | static int |
Thomas Graf | 661d296 | 2013-03-21 07:45:29 +0000 | [diff] [blame] | 4337 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4338 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 4339 | struct net *net = sock_net(skb->sk); |
Thomas Graf | b933f71 | 2006-09-18 00:10:19 -0700 | [diff] [blame] | 4340 | struct ifaddrmsg *ifm; |
| 4341 | struct nlattr *tb[IFA_MAX+1]; |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4342 | struct in6_addr *pfx, *peer_pfx; |
Heiner Kallweit | 6046d5b | 2014-04-20 21:29:36 +0200 | [diff] [blame] | 4343 | u32 ifa_flags; |
Thomas Graf | b933f71 | 2006-09-18 00:10:19 -0700 | [diff] [blame] | 4344 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4345 | |
Thomas Graf | b933f71 | 2006-09-18 00:10:19 -0700 | [diff] [blame] | 4346 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
| 4347 | if (err < 0) |
| 4348 | return err; |
| 4349 | |
| 4350 | ifm = nlmsg_data(nlh); |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4351 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 4352 | if (!pfx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4353 | return -EINVAL; |
| 4354 | |
Heiner Kallweit | 6046d5b | 2014-04-20 21:29:36 +0200 | [diff] [blame] | 4355 | ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags; |
| 4356 | |
| 4357 | /* We ignore other flags so far. */ |
| 4358 | ifa_flags &= IFA_F_MANAGETEMPADDR; |
| 4359 | |
| 4360 | return inet6_addr_del(net, ifm->ifa_index, ifa_flags, pfx, |
| 4361 | ifm->ifa_prefixlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4362 | } |
| 4363 | |
Jiri Pirko | 479840f | 2013-12-06 09:45:21 +0100 | [diff] [blame] | 4364 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u32 ifa_flags, |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 4365 | u32 prefered_lft, u32 valid_lft) |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 4366 | { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 4367 | u32 flags; |
| 4368 | clock_t expires; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 4369 | unsigned long timeout; |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 4370 | bool was_managetempaddr; |
Thomas Haller | 5b84efe | 2014-01-15 15:36:59 +0100 | [diff] [blame] | 4371 | bool had_prefixroute; |
YOSHIFUJI Hideaki | 46d4804 | 2007-02-07 20:36:26 +0900 | [diff] [blame] | 4372 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 4373 | ASSERT_RTNL(); |
| 4374 | |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 4375 | if (!valid_lft || (prefered_lft > valid_lft)) |
| 4376 | return -EINVAL; |
| 4377 | |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 4378 | if (ifa_flags & IFA_F_MANAGETEMPADDR && |
| 4379 | (ifp->flags & IFA_F_TEMPORARY || ifp->prefix_len != 64)) |
| 4380 | return -EINVAL; |
| 4381 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 4382 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
| 4383 | if (addrconf_finite_timeout(timeout)) { |
| 4384 | expires = jiffies_to_clock_t(timeout * HZ); |
| 4385 | valid_lft = timeout; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 4386 | flags = RTF_EXPIRES; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 4387 | } else { |
| 4388 | expires = 0; |
| 4389 | flags = 0; |
| 4390 | ifa_flags |= IFA_F_PERMANENT; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 4391 | } |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 4392 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 4393 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
| 4394 | if (addrconf_finite_timeout(timeout)) { |
| 4395 | if (timeout == 0) |
| 4396 | ifa_flags |= IFA_F_DEPRECATED; |
| 4397 | prefered_lft = timeout; |
| 4398 | } |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 4399 | |
| 4400 | spin_lock_bh(&ifp->lock); |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 4401 | was_managetempaddr = ifp->flags & IFA_F_MANAGETEMPADDR; |
Thomas Haller | 5b84efe | 2014-01-15 15:36:59 +0100 | [diff] [blame] | 4402 | had_prefixroute = ifp->flags & IFA_F_PERMANENT && |
| 4403 | !(ifp->flags & IFA_F_NOPREFIXROUTE); |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 4404 | ifp->flags &= ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | |
Thomas Haller | 761aac7 | 2014-01-15 15:36:58 +0100 | [diff] [blame] | 4405 | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR | |
| 4406 | IFA_F_NOPREFIXROUTE); |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 4407 | ifp->flags |= ifa_flags; |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 4408 | ifp->tstamp = jiffies; |
| 4409 | ifp->valid_lft = valid_lft; |
| 4410 | ifp->prefered_lft = prefered_lft; |
| 4411 | |
| 4412 | spin_unlock_bh(&ifp->lock); |
| 4413 | if (!(ifp->flags&IFA_F_TENTATIVE)) |
| 4414 | ipv6_ifa_notify(0, ifp); |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 4415 | |
Thomas Haller | 761aac7 | 2014-01-15 15:36:58 +0100 | [diff] [blame] | 4416 | if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) { |
| 4417 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
| 4418 | expires, flags); |
Thomas Haller | 5b84efe | 2014-01-15 15:36:59 +0100 | [diff] [blame] | 4419 | } else if (had_prefixroute) { |
| 4420 | enum cleanup_prefix_rt_t action; |
| 4421 | unsigned long rt_expires; |
| 4422 | |
| 4423 | write_lock_bh(&ifp->idev->lock); |
| 4424 | action = check_cleanup_prefix_route(ifp, &rt_expires); |
| 4425 | write_unlock_bh(&ifp->idev->lock); |
| 4426 | |
| 4427 | if (action != CLEANUP_PREFIX_RT_NOP) { |
| 4428 | cleanup_prefix_route(ifp, rt_expires, |
| 4429 | action == CLEANUP_PREFIX_RT_DEL); |
| 4430 | } |
Thomas Haller | 761aac7 | 2014-01-15 15:36:58 +0100 | [diff] [blame] | 4431 | } |
Jiri Pirko | 53bd674 | 2013-12-06 09:45:22 +0100 | [diff] [blame] | 4432 | |
| 4433 | if (was_managetempaddr || ifp->flags & IFA_F_MANAGETEMPADDR) { |
| 4434 | if (was_managetempaddr && !(ifp->flags & IFA_F_MANAGETEMPADDR)) |
| 4435 | valid_lft = prefered_lft = 0; |
| 4436 | manage_tempaddrs(ifp->idev, ifp, valid_lft, prefered_lft, |
| 4437 | !was_managetempaddr, jiffies); |
| 4438 | } |
| 4439 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 4440 | addrconf_verify_rtnl(); |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 4441 | |
| 4442 | return 0; |
| 4443 | } |
| 4444 | |
| 4445 | static int |
Thomas Graf | 661d296 | 2013-03-21 07:45:29 +0000 | [diff] [blame] | 4446 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4447 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 4448 | struct net *net = sock_net(skb->sk); |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 4449 | struct ifaddrmsg *ifm; |
| 4450 | struct nlattr *tb[IFA_MAX+1]; |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4451 | struct in6_addr *pfx, *peer_pfx; |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 4452 | struct inet6_ifaddr *ifa; |
| 4453 | struct net_device *dev; |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 4454 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
Jiri Pirko | 479840f | 2013-12-06 09:45:21 +0100 | [diff] [blame] | 4455 | u32 ifa_flags; |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 4456 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4457 | |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 4458 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
| 4459 | if (err < 0) |
| 4460 | return err; |
| 4461 | |
| 4462 | ifm = nlmsg_data(nlh); |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4463 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 4464 | if (!pfx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4465 | return -EINVAL; |
| 4466 | |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 4467 | if (tb[IFA_CACHEINFO]) { |
Noriaki TAKAMIYA | 0778769d | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 4468 | struct ifa_cacheinfo *ci; |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 4469 | |
| 4470 | ci = nla_data(tb[IFA_CACHEINFO]); |
Noriaki TAKAMIYA | 0778769d | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 4471 | valid_lft = ci->ifa_valid; |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 4472 | preferred_lft = ci->ifa_prefered; |
| 4473 | } else { |
| 4474 | preferred_lft = INFINITY_LIFE_TIME; |
| 4475 | valid_lft = INFINITY_LIFE_TIME; |
Noriaki TAKAMIYA | 0778769d | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 4476 | } |
| 4477 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 4478 | dev = __dev_get_by_index(net, ifm->ifa_index); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 4479 | if (!dev) |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 4480 | return -ENODEV; |
| 4481 | |
Jiri Pirko | 479840f | 2013-12-06 09:45:21 +0100 | [diff] [blame] | 4482 | ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags; |
| 4483 | |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 4484 | /* We ignore other flags so far. */ |
Thomas Haller | 761aac7 | 2014-01-15 15:36:58 +0100 | [diff] [blame] | 4485 | ifa_flags &= IFA_F_NODAD | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR | |
Madhu Challa | 93a714d | 2015-02-25 09:58:35 -0800 | [diff] [blame] | 4486 | IFA_F_NOPREFIXROUTE | IFA_F_MCAUTOJOIN; |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 4487 | |
Daniel Lezcano | 1cab3da | 2008-01-10 22:44:09 -0800 | [diff] [blame] | 4488 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 4489 | if (!ifa) { |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 4490 | /* |
| 4491 | * It would be best to check for !NLM_F_CREATE here but |
stephen hemminger | db9c7c3 | 2014-01-12 11:26:32 -0800 | [diff] [blame] | 4492 | * userspace already relies on not having to provide this. |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 4493 | */ |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4494 | return inet6_addr_add(net, ifm->ifa_index, pfx, peer_pfx, |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 4495 | ifm->ifa_prefixlen, ifa_flags, |
| 4496 | preferred_lft, valid_lft); |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 4497 | } |
| 4498 | |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 4499 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
| 4500 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) |
| 4501 | err = -EEXIST; |
| 4502 | else |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 4503 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 4504 | |
| 4505 | in6_ifa_put(ifa); |
| 4506 | |
| 4507 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4508 | } |
| 4509 | |
Jiri Pirko | 479840f | 2013-12-06 09:45:21 +0100 | [diff] [blame] | 4510 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u32 flags, |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 4511 | u8 scope, int ifindex) |
| 4512 | { |
| 4513 | struct ifaddrmsg *ifm; |
| 4514 | |
| 4515 | ifm = nlmsg_data(nlh); |
| 4516 | ifm->ifa_family = AF_INET6; |
| 4517 | ifm->ifa_prefixlen = prefixlen; |
| 4518 | ifm->ifa_flags = flags; |
| 4519 | ifm->ifa_scope = scope; |
| 4520 | ifm->ifa_index = ifindex; |
| 4521 | } |
| 4522 | |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 4523 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
| 4524 | unsigned long tstamp, u32 preferred, u32 valid) |
| 4525 | { |
| 4526 | struct ifa_cacheinfo ci; |
| 4527 | |
Thomas Graf | 18a31e1 | 2010-11-17 04:12:02 +0000 | [diff] [blame] | 4528 | ci.cstamp = cstamp_delta(cstamp); |
| 4529 | ci.tstamp = cstamp_delta(tstamp); |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 4530 | ci.ifa_prefered = preferred; |
| 4531 | ci.ifa_valid = valid; |
| 4532 | |
| 4533 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); |
| 4534 | } |
| 4535 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 4536 | static inline int rt_scope(int ifa_scope) |
| 4537 | { |
| 4538 | if (ifa_scope & IFA_HOST) |
| 4539 | return RT_SCOPE_HOST; |
| 4540 | else if (ifa_scope & IFA_LINK) |
| 4541 | return RT_SCOPE_LINK; |
| 4542 | else if (ifa_scope & IFA_SITE) |
| 4543 | return RT_SCOPE_SITE; |
| 4544 | else |
| 4545 | return RT_SCOPE_UNIVERSE; |
| 4546 | } |
| 4547 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 4548 | static inline int inet6_ifaddr_msgsize(void) |
| 4549 | { |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 4550 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4551 | + nla_total_size(16) /* IFA_LOCAL */ |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 4552 | + nla_total_size(16) /* IFA_ADDRESS */ |
Jiri Pirko | 479840f | 2013-12-06 09:45:21 +0100 | [diff] [blame] | 4553 | + nla_total_size(sizeof(struct ifa_cacheinfo)) |
| 4554 | + nla_total_size(4) /* IFA_FLAGS */; |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 4555 | } |
YOSHIFUJI Hideaki | c5396a3 | 2006-06-17 22:48:48 -0700 | [diff] [blame] | 4556 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4557 | 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] | 4558 | u32 portid, u32 seq, int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4559 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4560 | struct nlmsghdr *nlh; |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 4561 | u32 preferred, valid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4562 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 4563 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 4564 | if (!nlh) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 4565 | return -EMSGSIZE; |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 4566 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 4567 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
| 4568 | ifa->idev->dev->ifindex); |
| 4569 | |
Yasushi Asano | fad8da3 | 2013-12-31 12:04:19 +0900 | [diff] [blame] | 4570 | if (!((ifa->flags&IFA_F_PERMANENT) && |
| 4571 | (ifa->prefered_lft == INFINITY_LIFE_TIME))) { |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 4572 | preferred = ifa->prefered_lft; |
| 4573 | valid = ifa->valid_lft; |
| 4574 | if (preferred != INFINITY_LIFE_TIME) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4575 | long tval = (jiffies - ifa->tstamp)/HZ; |
Jens Rosenboom | a1faa69 | 2009-06-25 04:55:50 +0000 | [diff] [blame] | 4576 | if (preferred > tval) |
| 4577 | preferred -= tval; |
| 4578 | else |
| 4579 | preferred = 0; |
Ben Hutchings | f56619f | 2010-06-26 11:37:47 +0000 | [diff] [blame] | 4580 | if (valid != INFINITY_LIFE_TIME) { |
| 4581 | if (valid > tval) |
| 4582 | valid -= tval; |
| 4583 | else |
| 4584 | valid = 0; |
| 4585 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4586 | } |
| 4587 | } else { |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 4588 | preferred = INFINITY_LIFE_TIME; |
| 4589 | valid = INFINITY_LIFE_TIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4590 | } |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 4591 | |
Cong Wang | 7996c79 | 2013-05-22 05:41:06 +0000 | [diff] [blame] | 4592 | if (!ipv6_addr_any(&ifa->peer_addr)) { |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 4593 | if (nla_put_in6_addr(skb, IFA_LOCAL, &ifa->addr) < 0 || |
| 4594 | nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->peer_addr) < 0) |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4595 | goto error; |
| 4596 | } else |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 4597 | if (nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->addr) < 0) |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4598 | goto error; |
| 4599 | |
| 4600 | if (put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) |
| 4601 | goto error; |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 4602 | |
Jiri Pirko | 479840f | 2013-12-06 09:45:21 +0100 | [diff] [blame] | 4603 | if (nla_put_u32(skb, IFA_FLAGS, ifa->flags) < 0) |
| 4604 | goto error; |
| 4605 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 4606 | nlmsg_end(skb, nlh); |
| 4607 | return 0; |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4608 | |
| 4609 | error: |
| 4610 | nlmsg_cancel(skb, nlh); |
| 4611 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4612 | } |
| 4613 | |
| 4614 | 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] | 4615 | u32 portid, u32 seq, int event, u16 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4616 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4617 | struct nlmsghdr *nlh; |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 4618 | u8 scope = RT_SCOPE_UNIVERSE; |
| 4619 | int ifindex = ifmca->idev->dev->ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4620 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 4621 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) |
| 4622 | scope = RT_SCOPE_SITE; |
| 4623 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 4624 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 4625 | if (!nlh) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 4626 | return -EMSGSIZE; |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 4627 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 4628 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 4629 | if (nla_put_in6_addr(skb, IFA_MULTICAST, &ifmca->mca_addr) < 0 || |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 4630 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 4631 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
| 4632 | nlmsg_cancel(skb, nlh); |
| 4633 | return -EMSGSIZE; |
| 4634 | } |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 4635 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 4636 | nlmsg_end(skb, nlh); |
| 4637 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4638 | } |
| 4639 | |
| 4640 | 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] | 4641 | u32 portid, u32 seq, int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4642 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4643 | struct nlmsghdr *nlh; |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 4644 | u8 scope = RT_SCOPE_UNIVERSE; |
| 4645 | int ifindex = ifaca->aca_idev->dev->ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4646 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 4647 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) |
| 4648 | scope = RT_SCOPE_SITE; |
| 4649 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 4650 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 4651 | if (!nlh) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 4652 | return -EMSGSIZE; |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 4653 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 4654 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 4655 | if (nla_put_in6_addr(skb, IFA_ANYCAST, &ifaca->aca_addr) < 0 || |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 4656 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 4657 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
| 4658 | nlmsg_cancel(skb, nlh); |
| 4659 | return -EMSGSIZE; |
| 4660 | } |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 4661 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 4662 | nlmsg_end(skb, nlh); |
| 4663 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4664 | } |
| 4665 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4666 | enum addr_type_t { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4667 | UNICAST_ADDR, |
| 4668 | MULTICAST_ADDR, |
| 4669 | ANYCAST_ADDR, |
| 4670 | }; |
| 4671 | |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4672 | /* called with rcu_read_lock() */ |
| 4673 | static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb, |
| 4674 | struct netlink_callback *cb, enum addr_type_t type, |
| 4675 | int s_ip_idx, int *p_ip_idx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4676 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4677 | struct ifmcaddr6 *ifmca; |
| 4678 | struct ifacaddr6 *ifaca; |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4679 | int err = 1; |
| 4680 | int ip_idx = *p_ip_idx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4681 | |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4682 | read_lock_bh(&idev->lock); |
| 4683 | switch (type) { |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 4684 | case UNICAST_ADDR: { |
| 4685 | struct inet6_ifaddr *ifa; |
| 4686 | |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4687 | /* unicast address incl. temp addr */ |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 4688 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
| 4689 | if (++ip_idx < s_ip_idx) |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4690 | continue; |
| 4691 | err = inet6_fill_ifaddr(skb, ifa, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 4692 | NETLINK_CB(cb->skb).portid, |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4693 | cb->nlh->nlmsg_seq, |
| 4694 | RTM_NEWADDR, |
| 4695 | NLM_F_MULTI); |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 4696 | if (err < 0) |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4697 | break; |
Nicolas Dichtel | 63998ac | 2013-03-22 06:28:43 +0000 | [diff] [blame] | 4698 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4699 | } |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4700 | break; |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 4701 | } |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4702 | case MULTICAST_ADDR: |
| 4703 | /* multicast address */ |
| 4704 | for (ifmca = idev->mc_list; ifmca; |
| 4705 | ifmca = ifmca->next, ip_idx++) { |
| 4706 | if (ip_idx < s_ip_idx) |
| 4707 | continue; |
| 4708 | err = inet6_fill_ifmcaddr(skb, ifmca, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 4709 | NETLINK_CB(cb->skb).portid, |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4710 | cb->nlh->nlmsg_seq, |
| 4711 | RTM_GETMULTICAST, |
| 4712 | NLM_F_MULTI); |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 4713 | if (err < 0) |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4714 | break; |
| 4715 | } |
| 4716 | break; |
| 4717 | case ANYCAST_ADDR: |
| 4718 | /* anycast address */ |
| 4719 | for (ifaca = idev->ac_list; ifaca; |
| 4720 | ifaca = ifaca->aca_next, ip_idx++) { |
| 4721 | if (ip_idx < s_ip_idx) |
| 4722 | continue; |
| 4723 | err = inet6_fill_ifacaddr(skb, ifaca, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 4724 | NETLINK_CB(cb->skb).portid, |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4725 | cb->nlh->nlmsg_seq, |
| 4726 | RTM_GETANYCAST, |
| 4727 | NLM_F_MULTI); |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 4728 | if (err < 0) |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4729 | break; |
| 4730 | } |
| 4731 | break; |
| 4732 | default: |
| 4733 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4734 | } |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4735 | read_unlock_bh(&idev->lock); |
| 4736 | *p_ip_idx = ip_idx; |
| 4737 | return err; |
| 4738 | } |
| 4739 | |
| 4740 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, |
| 4741 | enum addr_type_t type) |
| 4742 | { |
| 4743 | struct net *net = sock_net(skb->sk); |
| 4744 | int h, s_h; |
| 4745 | int idx, ip_idx; |
| 4746 | int s_idx, s_ip_idx; |
| 4747 | struct net_device *dev; |
| 4748 | struct inet6_dev *idev; |
| 4749 | struct hlist_head *head; |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4750 | |
| 4751 | s_h = cb->args[0]; |
| 4752 | s_idx = idx = cb->args[1]; |
| 4753 | s_ip_idx = ip_idx = cb->args[2]; |
| 4754 | |
| 4755 | rcu_read_lock(); |
Nicolas Dichtel | 63998ac | 2013-03-22 06:28:43 +0000 | [diff] [blame] | 4756 | 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] | 4757 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
| 4758 | idx = 0; |
| 4759 | head = &net->dev_index_head[h]; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 4760 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4761 | if (idx < s_idx) |
| 4762 | goto cont; |
Patrick McHardy | 4b97efd | 2010-03-26 20:27:49 -0700 | [diff] [blame] | 4763 | if (h > s_h || idx > s_idx) |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4764 | s_ip_idx = 0; |
| 4765 | ip_idx = 0; |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4766 | idev = __in6_dev_get(dev); |
| 4767 | if (!idev) |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4768 | goto cont; |
| 4769 | |
| 4770 | if (in6_dump_addrs(idev, skb, cb, type, |
David S. Miller | 7b46a64 | 2015-01-18 23:36:08 -0500 | [diff] [blame] | 4771 | s_ip_idx, &ip_idx) < 0) |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4772 | goto done; |
| 4773 | cont: |
| 4774 | idx++; |
| 4775 | } |
| 4776 | } |
| 4777 | done: |
| 4778 | rcu_read_unlock(); |
| 4779 | cb->args[0] = h; |
| 4780 | cb->args[1] = idx; |
| 4781 | cb->args[2] = ip_idx; |
| 4782 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4783 | return skb->len; |
| 4784 | } |
| 4785 | |
| 4786 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) |
| 4787 | { |
| 4788 | enum addr_type_t type = UNICAST_ADDR; |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 4789 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4790 | return inet6_dump_addr(skb, cb, type); |
| 4791 | } |
| 4792 | |
| 4793 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) |
| 4794 | { |
| 4795 | enum addr_type_t type = MULTICAST_ADDR; |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 4796 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4797 | return inet6_dump_addr(skb, cb, type); |
| 4798 | } |
| 4799 | |
| 4800 | |
| 4801 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) |
| 4802 | { |
| 4803 | enum addr_type_t type = ANYCAST_ADDR; |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 4804 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4805 | return inet6_dump_addr(skb, cb, type); |
| 4806 | } |
| 4807 | |
Thomas Graf | 661d296 | 2013-03-21 07:45:29 +0000 | [diff] [blame] | 4808 | 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] | 4809 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 4810 | struct net *net = sock_net(in_skb->sk); |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 4811 | struct ifaddrmsg *ifm; |
| 4812 | struct nlattr *tb[IFA_MAX+1]; |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4813 | struct in6_addr *addr = NULL, *peer; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4814 | struct net_device *dev = NULL; |
| 4815 | struct inet6_ifaddr *ifa; |
| 4816 | struct sk_buff *skb; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4817 | int err; |
| 4818 | |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 4819 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
| 4820 | if (err < 0) |
| 4821 | goto errout; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4822 | |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4823 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 4824 | if (!addr) { |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 4825 | err = -EINVAL; |
| 4826 | goto errout; |
| 4827 | } |
| 4828 | |
| 4829 | ifm = nlmsg_data(nlh); |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4830 | if (ifm->ifa_index) |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 4831 | dev = __dev_get_by_index(net, ifm->ifa_index); |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4832 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4833 | ifa = ipv6_get_ifaddr(net, addr, dev, 1); |
| 4834 | if (!ifa) { |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 4835 | err = -EADDRNOTAVAIL; |
| 4836 | goto errout; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4837 | } |
| 4838 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4839 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL); |
| 4840 | if (!skb) { |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 4841 | err = -ENOBUFS; |
| 4842 | goto errout_ifa; |
| 4843 | } |
| 4844 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 4845 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).portid, |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4846 | nlh->nlmsg_seq, RTM_NEWADDR, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 4847 | if (err < 0) { |
| 4848 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ |
| 4849 | WARN_ON(err == -EMSGSIZE); |
| 4850 | kfree_skb(skb); |
| 4851 | goto errout_ifa; |
| 4852 | } |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 4853 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 4854 | errout_ifa: |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4855 | in6_ifa_put(ifa); |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 4856 | errout: |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4857 | return err; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4858 | } |
| 4859 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4860 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
| 4861 | { |
| 4862 | struct sk_buff *skb; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 4863 | struct net *net = dev_net(ifa->idev->dev); |
Thomas Graf | 5d62026 | 2006-08-15 00:35:02 -0700 | [diff] [blame] | 4864 | int err = -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4865 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 4866 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 4867 | if (!skb) |
Thomas Graf | 5d62026 | 2006-08-15 00:35:02 -0700 | [diff] [blame] | 4868 | goto errout; |
| 4869 | |
| 4870 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 4871 | if (err < 0) { |
| 4872 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ |
| 4873 | WARN_ON(err == -EMSGSIZE); |
| 4874 | kfree_skb(skb); |
| 4875 | goto errout; |
| 4876 | } |
Pablo Neira Ayuso | 1ce85fe | 2009-02-24 23:18:28 -0800 | [diff] [blame] | 4877 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
| 4878 | return; |
Thomas Graf | 5d62026 | 2006-08-15 00:35:02 -0700 | [diff] [blame] | 4879 | errout: |
| 4880 | if (err < 0) |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 4881 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4882 | } |
| 4883 | |
Dave Jones | b6f99a2 | 2007-03-22 12:27:49 -0700 | [diff] [blame] | 4884 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4885 | __s32 *array, int bytes) |
| 4886 | { |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 4887 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
| 4888 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4889 | memset(array, 0, bytes); |
| 4890 | array[DEVCONF_FORWARDING] = cnf->forwarding; |
| 4891 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; |
| 4892 | array[DEVCONF_MTU6] = cnf->mtu6; |
| 4893 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; |
| 4894 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; |
| 4895 | array[DEVCONF_AUTOCONF] = cnf->autoconf; |
| 4896 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; |
| 4897 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; |
Thomas Graf | 93908d1 | 2010-11-17 01:44:24 +0000 | [diff] [blame] | 4898 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = |
| 4899 | jiffies_to_msecs(cnf->rtr_solicit_interval); |
Maciej Żenczykowski | bd11f07 | 2016-09-27 23:57:58 -0700 | [diff] [blame] | 4900 | array[DEVCONF_RTR_SOLICIT_MAX_INTERVAL] = |
| 4901 | jiffies_to_msecs(cnf->rtr_solicit_max_interval); |
Thomas Graf | 93908d1 | 2010-11-17 01:44:24 +0000 | [diff] [blame] | 4902 | array[DEVCONF_RTR_SOLICIT_DELAY] = |
| 4903 | jiffies_to_msecs(cnf->rtr_solicit_delay); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4904 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; |
Hannes Frederic Sowa | fc4eba5 | 2013-08-14 01:03:46 +0200 | [diff] [blame] | 4905 | array[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL] = |
| 4906 | jiffies_to_msecs(cnf->mldv1_unsolicited_report_interval); |
| 4907 | array[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL] = |
| 4908 | jiffies_to_msecs(cnf->mldv2_unsolicited_report_interval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4909 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; |
| 4910 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; |
| 4911 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; |
| 4912 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; |
| 4913 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4914 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 4915 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
Hangbin Liu | 8013d1d7 | 2015-07-30 14:28:42 +0800 | [diff] [blame] | 4916 | 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] | 4917 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 4918 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 4919 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; |
Thomas Graf | 93908d1 | 2010-11-17 01:44:24 +0000 | [diff] [blame] | 4920 | array[DEVCONF_RTR_PROBE_INTERVAL] = |
| 4921 | jiffies_to_msecs(cnf->rtr_probe_interval); |
Neil Horman | fa03ef3 | 2007-01-30 14:30:10 -0800 | [diff] [blame] | 4922 | #ifdef CONFIG_IPV6_ROUTE_INFO |
YOSHIFUJI Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 4923 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
| 4924 | #endif |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 4925 | #endif |
YOSHIFUJI Hideaki | fbea49e | 2006-09-22 14:43:49 -0700 | [diff] [blame] | 4926 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 4927 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 4928 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 4929 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; |
Erik Kline | 7fd2561 | 2014-10-28 18:11:14 +0900 | [diff] [blame] | 4930 | array[DEVCONF_USE_OPTIMISTIC] = cnf->use_optimistic; |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 4931 | #endif |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 4932 | #ifdef CONFIG_IPV6_MROUTE |
| 4933 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; |
| 4934 | #endif |
YOSHIFUJI Hideaki | 778d80b | 2008-06-28 14:17:11 +0900 | [diff] [blame] | 4935 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 4936 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
Cosmin Ratiu | c3faca0 | 2009-10-09 03:11:14 +0000 | [diff] [blame] | 4937 | array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao; |
Hannes Frederic Sowa | 5cb0443 | 2012-11-06 16:46:20 +0000 | [diff] [blame] | 4938 | array[DEVCONF_NDISC_NOTIFY] = cnf->ndisc_notify; |
Hannes Frederic Sowa | b800c3b | 2013-08-27 01:36:51 +0200 | [diff] [blame] | 4939 | array[DEVCONF_SUPPRESS_FRAG_NDISC] = cnf->suppress_frag_ndisc; |
Ben Greear | d933319 | 2014-06-25 14:44:53 -0700 | [diff] [blame] | 4940 | array[DEVCONF_ACCEPT_RA_FROM_LOCAL] = cnf->accept_ra_from_local; |
Harout Hedeshian | c2943f1 | 2015-01-20 10:06:05 -0700 | [diff] [blame] | 4941 | array[DEVCONF_ACCEPT_RA_MTU] = cnf->accept_ra_mtu; |
Andy Gospodarek | 35103d1 | 2015-08-13 10:39:01 -0400 | [diff] [blame] | 4942 | array[DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN] = cnf->ignore_routes_with_linkdown; |
Hannes Frederic Sowa | 3d1bec9 | 2015-03-23 23:36:00 +0100 | [diff] [blame] | 4943 | /* we omit DEVCONF_STABLE_SECRET for now */ |
Erik Kline | 3985e8a | 2015-07-22 16:38:25 +0900 | [diff] [blame] | 4944 | array[DEVCONF_USE_OIF_ADDRS_ONLY] = cnf->use_oif_addrs_only; |
Johannes Berg | abbc304 | 2016-02-04 13:31:19 +0100 | [diff] [blame] | 4945 | 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] | 4946 | array[DEVCONF_DROP_UNSOLICITED_NA] = cnf->drop_unsolicited_na; |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 4947 | array[DEVCONF_KEEP_ADDR_ON_DOWN] = cnf->keep_addr_on_down; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4948 | } |
| 4949 | |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 4950 | static inline size_t inet6_ifla6_size(void) |
| 4951 | { |
| 4952 | return nla_total_size(4) /* IFLA_INET6_FLAGS */ |
| 4953 | + nla_total_size(sizeof(struct ifla_cacheinfo)) |
| 4954 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ |
| 4955 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 4956 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ |
| 4957 | + nla_total_size(sizeof(struct in6_addr)); /* IFLA_INET6_TOKEN */ |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 4958 | } |
| 4959 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 4960 | static inline size_t inet6_if_nlmsg_size(void) |
| 4961 | { |
| 4962 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) |
| 4963 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ |
| 4964 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ |
| 4965 | + nla_total_size(4) /* IFLA_MTU */ |
| 4966 | + nla_total_size(4) /* IFLA_LINK */ |
Andy Gospodarek | 0344338 | 2015-08-13 15:26:35 -0400 | [diff] [blame] | 4967 | + nla_total_size(1) /* IFLA_OPERSTATE */ |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 4968 | + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */ |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 4969 | } |
YOSHIFUJI Hideaki | c5396a3 | 2006-06-17 22:48:48 -0700 | [diff] [blame] | 4970 | |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 4971 | static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib, |
Jia He | aca0567 | 2016-09-30 11:29:03 +0800 | [diff] [blame] | 4972 | int bytes) |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 4973 | { |
| 4974 | int i; |
Jia He | aca0567 | 2016-09-30 11:29:03 +0800 | [diff] [blame] | 4975 | int pad = bytes - sizeof(u64) * ICMP6_MIB_MAX; |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 4976 | BUG_ON(pad < 0); |
| 4977 | |
| 4978 | /* Use put_unaligned() because stats may not be aligned for u64. */ |
Jia He | aca0567 | 2016-09-30 11:29:03 +0800 | [diff] [blame] | 4979 | put_unaligned(ICMP6_MIB_MAX, &stats[0]); |
| 4980 | for (i = 1; i < ICMP6_MIB_MAX; i++) |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 4981 | put_unaligned(atomic_long_read(&mib[i]), &stats[i]); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 4982 | |
Jia He | aca0567 | 2016-09-30 11:29:03 +0800 | [diff] [blame] | 4983 | memset(&stats[ICMP6_MIB_MAX], 0, pad); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 4984 | } |
| 4985 | |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 4986 | static inline void __snmp6_fill_stats64(u64 *stats, void __percpu *mib, |
Raghavendra K T | a3a7737 | 2015-08-30 11:29:42 +0530 | [diff] [blame] | 4987 | int bytes, size_t syncpoff) |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 4988 | { |
Raghavendra K T | a3a7737 | 2015-08-30 11:29:42 +0530 | [diff] [blame] | 4989 | int i, c; |
| 4990 | u64 buff[IPSTATS_MIB_MAX]; |
| 4991 | int pad = bytes - sizeof(u64) * IPSTATS_MIB_MAX; |
| 4992 | |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 4993 | BUG_ON(pad < 0); |
| 4994 | |
Raghavendra K T | a3a7737 | 2015-08-30 11:29:42 +0530 | [diff] [blame] | 4995 | memset(buff, 0, sizeof(buff)); |
| 4996 | buff[0] = IPSTATS_MIB_MAX; |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 4997 | |
Raghavendra K T | a3a7737 | 2015-08-30 11:29:42 +0530 | [diff] [blame] | 4998 | for_each_possible_cpu(c) { |
| 4999 | for (i = 1; i < IPSTATS_MIB_MAX; i++) |
| 5000 | buff[i] += snmp_get_cpu_field64(mib, c, i, syncpoff); |
| 5001 | } |
| 5002 | |
| 5003 | memcpy(stats, buff, IPSTATS_MIB_MAX * sizeof(u64)); |
| 5004 | memset(&stats[IPSTATS_MIB_MAX], 0, pad); |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 5005 | } |
| 5006 | |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 5007 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, |
| 5008 | int bytes) |
| 5009 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5010 | switch (attrtype) { |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 5011 | case IFLA_INET6_STATS: |
Raghavendra K T | a3a7737 | 2015-08-30 11:29:42 +0530 | [diff] [blame] | 5012 | __snmp6_fill_stats64(stats, idev->stats.ipv6, bytes, |
| 5013 | offsetof(struct ipstats_mib, syncp)); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 5014 | break; |
| 5015 | case IFLA_INET6_ICMP6STATS: |
Jia He | aca0567 | 2016-09-30 11:29:03 +0800 | [diff] [blame] | 5016 | __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, bytes); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 5017 | break; |
| 5018 | } |
| 5019 | } |
| 5020 | |
Sowmini Varadhan | d5566fd | 2015-09-11 16:48:48 -0400 | [diff] [blame] | 5021 | static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev, |
| 5022 | u32 ext_filter_mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5023 | { |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 5024 | struct nlattr *nla; |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 5025 | struct ifla_cacheinfo ci; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5026 | |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 5027 | if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags)) |
| 5028 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5029 | ci.max_reasm_len = IPV6_MAXPLEN; |
David S. Miller | 2491242 | 2010-11-19 13:13:47 -0800 | [diff] [blame] | 5030 | ci.tstamp = cstamp_delta(idev->tstamp); |
| 5031 | ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time); |
Jiri Pirko | 1f9248e | 2013-12-07 19:26:53 +0100 | [diff] [blame] | 5032 | 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] | 5033 | if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci)) |
| 5034 | goto nla_put_failure; |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 5035 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 5036 | if (!nla) |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 5037 | goto nla_put_failure; |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 5038 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5039 | |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 5040 | /* XXX - MC not implemented */ |
| 5041 | |
Sowmini Varadhan | d5566fd | 2015-09-11 16:48:48 -0400 | [diff] [blame] | 5042 | if (ext_filter_mask & RTEXT_FILTER_SKIP_STATS) |
| 5043 | return 0; |
| 5044 | |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 5045 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 5046 | if (!nla) |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 5047 | goto nla_put_failure; |
| 5048 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); |
| 5049 | |
| 5050 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 5051 | if (!nla) |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 5052 | goto nla_put_failure; |
| 5053 | 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] | 5054 | |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5055 | nla = nla_reserve(skb, IFLA_INET6_TOKEN, sizeof(struct in6_addr)); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 5056 | if (!nla) |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5057 | goto nla_put_failure; |
Jiri Pirko | bc91b0f | 2014-07-11 21:10:18 +0200 | [diff] [blame] | 5058 | |
| 5059 | if (nla_put_u8(skb, IFLA_INET6_ADDR_GEN_MODE, idev->addr_gen_mode)) |
| 5060 | goto nla_put_failure; |
| 5061 | |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5062 | read_lock_bh(&idev->lock); |
| 5063 | memcpy(nla_data(nla), idev->token.s6_addr, nla_len(nla)); |
| 5064 | read_unlock_bh(&idev->lock); |
| 5065 | |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 5066 | return 0; |
| 5067 | |
| 5068 | nla_put_failure: |
| 5069 | return -EMSGSIZE; |
| 5070 | } |
| 5071 | |
Arad, Ronen | b1974ed | 2015-10-19 09:23:28 -0700 | [diff] [blame] | 5072 | static size_t inet6_get_link_af_size(const struct net_device *dev, |
| 5073 | u32 ext_filter_mask) |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 5074 | { |
| 5075 | if (!__in6_dev_get(dev)) |
| 5076 | return 0; |
| 5077 | |
| 5078 | return inet6_ifla6_size(); |
| 5079 | } |
| 5080 | |
Sowmini Varadhan | d5566fd | 2015-09-11 16:48:48 -0400 | [diff] [blame] | 5081 | static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev, |
| 5082 | u32 ext_filter_mask) |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 5083 | { |
| 5084 | struct inet6_dev *idev = __in6_dev_get(dev); |
| 5085 | |
| 5086 | if (!idev) |
| 5087 | return -ENODATA; |
| 5088 | |
Sowmini Varadhan | d5566fd | 2015-09-11 16:48:48 -0400 | [diff] [blame] | 5089 | if (inet6_fill_ifla6_attrs(skb, idev, ext_filter_mask) < 0) |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 5090 | return -EMSGSIZE; |
| 5091 | |
| 5092 | return 0; |
| 5093 | } |
| 5094 | |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5095 | static int inet6_set_iftoken(struct inet6_dev *idev, struct in6_addr *token) |
| 5096 | { |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5097 | struct inet6_ifaddr *ifp; |
| 5098 | struct net_device *dev = idev->dev; |
Daniel Borkmann | 47e27d5 | 2016-04-08 15:55:00 +0200 | [diff] [blame] | 5099 | bool clear_token, update_rs = false; |
Hannes Frederic Sowa | dc84829 | 2013-06-24 21:42:40 +0200 | [diff] [blame] | 5100 | struct in6_addr ll_addr; |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5101 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 5102 | ASSERT_RTNL(); |
| 5103 | |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 5104 | if (!token) |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5105 | return -EINVAL; |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5106 | if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) |
| 5107 | return -EINVAL; |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5108 | if (!ipv6_accept_ra(idev)) |
| 5109 | return -EINVAL; |
Maciej Żenczykowski | bd11f07 | 2016-09-27 23:57:58 -0700 | [diff] [blame] | 5110 | if (idev->cnf.rtr_solicits == 0) |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5111 | return -EINVAL; |
| 5112 | |
| 5113 | write_lock_bh(&idev->lock); |
| 5114 | |
| 5115 | BUILD_BUG_ON(sizeof(token->s6_addr) != 16); |
| 5116 | memcpy(idev->token.s6_addr + 8, token->s6_addr + 8, 8); |
| 5117 | |
| 5118 | write_unlock_bh(&idev->lock); |
| 5119 | |
Daniel Borkmann | 47e27d5 | 2016-04-08 15:55:00 +0200 | [diff] [blame] | 5120 | clear_token = ipv6_addr_any(token); |
| 5121 | if (clear_token) |
| 5122 | goto update_lft; |
| 5123 | |
Hannes Frederic Sowa | dc84829 | 2013-06-24 21:42:40 +0200 | [diff] [blame] | 5124 | if (!idev->dead && (idev->if_flags & IF_READY) && |
| 5125 | !ipv6_get_lladdr(dev, &ll_addr, IFA_F_TENTATIVE | |
| 5126 | IFA_F_OPTIMISTIC)) { |
Daniel Borkmann | fc40383 | 2013-04-09 03:47:15 +0000 | [diff] [blame] | 5127 | /* If we're not ready, then normal ifup will take care |
| 5128 | * of this. Otherwise, we need to request our rs here. |
| 5129 | */ |
| 5130 | ndisc_send_rs(dev, &ll_addr, &in6addr_linklocal_allrouters); |
| 5131 | update_rs = true; |
| 5132 | } |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5133 | |
Daniel Borkmann | 47e27d5 | 2016-04-08 15:55:00 +0200 | [diff] [blame] | 5134 | update_lft: |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5135 | write_lock_bh(&idev->lock); |
Daniel Borkmann | fc40383 | 2013-04-09 03:47:15 +0000 | [diff] [blame] | 5136 | |
Hannes Frederic Sowa | 77ecaac | 2013-06-26 03:41:49 +0200 | [diff] [blame] | 5137 | if (update_rs) { |
Daniel Borkmann | fc40383 | 2013-04-09 03:47:15 +0000 | [diff] [blame] | 5138 | idev->if_flags |= IF_RS_SENT; |
Maciej Żenczykowski | bd11f07 | 2016-09-27 23:57:58 -0700 | [diff] [blame] | 5139 | idev->rs_interval = rfc3315_s14_backoff_init( |
| 5140 | idev->cnf.rtr_solicit_interval); |
Hannes Frederic Sowa | 77ecaac | 2013-06-26 03:41:49 +0200 | [diff] [blame] | 5141 | idev->rs_probes = 1; |
Maciej Żenczykowski | bd11f07 | 2016-09-27 23:57:58 -0700 | [diff] [blame] | 5142 | addrconf_mod_rs_timer(idev, idev->rs_interval); |
Hannes Frederic Sowa | 77ecaac | 2013-06-26 03:41:49 +0200 | [diff] [blame] | 5143 | } |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5144 | |
| 5145 | /* Well, that's kinda nasty ... */ |
| 5146 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
| 5147 | spin_lock(&ifp->lock); |
Daniel Borkmann | 617fe29 | 2013-04-09 03:47:16 +0000 | [diff] [blame] | 5148 | if (ifp->tokenized) { |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5149 | ifp->valid_lft = 0; |
| 5150 | ifp->prefered_lft = 0; |
| 5151 | } |
| 5152 | spin_unlock(&ifp->lock); |
| 5153 | } |
| 5154 | |
| 5155 | write_unlock_bh(&idev->lock); |
Lubomir Rintel | b2ed64a | 2014-10-27 17:39:16 +0100 | [diff] [blame] | 5156 | inet6_ifinfo_notify(RTM_NEWLINK, idev); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 5157 | addrconf_verify_rtnl(); |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5158 | return 0; |
| 5159 | } |
| 5160 | |
Daniel Borkmann | 11b1f82 | 2015-02-05 14:39:11 +0100 | [diff] [blame] | 5161 | static const struct nla_policy inet6_af_policy[IFLA_INET6_MAX + 1] = { |
| 5162 | [IFLA_INET6_ADDR_GEN_MODE] = { .type = NLA_U8 }, |
| 5163 | [IFLA_INET6_TOKEN] = { .len = sizeof(struct in6_addr) }, |
| 5164 | }; |
| 5165 | |
| 5166 | static int inet6_validate_link_af(const struct net_device *dev, |
| 5167 | const struct nlattr *nla) |
| 5168 | { |
| 5169 | struct nlattr *tb[IFLA_INET6_MAX + 1]; |
| 5170 | |
| 5171 | if (dev && !__in6_dev_get(dev)) |
| 5172 | return -EAFNOSUPPORT; |
| 5173 | |
| 5174 | return nla_parse_nested(tb, IFLA_INET6_MAX, nla, inet6_af_policy); |
| 5175 | } |
| 5176 | |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5177 | static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla) |
| 5178 | { |
| 5179 | int err = -EINVAL; |
| 5180 | struct inet6_dev *idev = __in6_dev_get(dev); |
| 5181 | struct nlattr *tb[IFLA_INET6_MAX + 1]; |
| 5182 | |
| 5183 | if (!idev) |
| 5184 | return -EAFNOSUPPORT; |
| 5185 | |
| 5186 | if (nla_parse_nested(tb, IFLA_INET6_MAX, nla, NULL) < 0) |
| 5187 | BUG(); |
| 5188 | |
Jiri Pirko | bc91b0f | 2014-07-11 21:10:18 +0200 | [diff] [blame] | 5189 | if (tb[IFLA_INET6_TOKEN]) { |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5190 | err = inet6_set_iftoken(idev, nla_data(tb[IFLA_INET6_TOKEN])); |
Jiri Pirko | bc91b0f | 2014-07-11 21:10:18 +0200 | [diff] [blame] | 5191 | if (err) |
| 5192 | return err; |
| 5193 | } |
| 5194 | |
| 5195 | if (tb[IFLA_INET6_ADDR_GEN_MODE]) { |
| 5196 | u8 mode = nla_get_u8(tb[IFLA_INET6_ADDR_GEN_MODE]); |
| 5197 | |
| 5198 | if (mode != IN6_ADDR_GEN_MODE_EUI64 && |
Hannes Frederic Sowa | 622c81d5 | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 5199 | mode != IN6_ADDR_GEN_MODE_NONE && |
Bjørn Mork | cc9da6c | 2015-12-16 16:44:38 +0100 | [diff] [blame] | 5200 | mode != IN6_ADDR_GEN_MODE_STABLE_PRIVACY && |
| 5201 | mode != IN6_ADDR_GEN_MODE_RANDOM) |
Jiri Pirko | bc91b0f | 2014-07-11 21:10:18 +0200 | [diff] [blame] | 5202 | return -EINVAL; |
Hannes Frederic Sowa | 622c81d5 | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 5203 | |
| 5204 | if (mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY && |
| 5205 | !idev->cnf.stable_secret.initialized && |
| 5206 | !dev_net(dev)->ipv6.devconf_dflt->stable_secret.initialized) |
| 5207 | return -EINVAL; |
| 5208 | |
Jiri Pirko | bc91b0f | 2014-07-11 21:10:18 +0200 | [diff] [blame] | 5209 | idev->addr_gen_mode = mode; |
| 5210 | err = 0; |
| 5211 | } |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5212 | |
| 5213 | return err; |
| 5214 | } |
| 5215 | |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 5216 | 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] | 5217 | u32 portid, u32 seq, int event, unsigned int flags) |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 5218 | { |
| 5219 | struct net_device *dev = idev->dev; |
| 5220 | struct ifinfomsg *hdr; |
| 5221 | struct nlmsghdr *nlh; |
| 5222 | void *protoinfo; |
| 5223 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 5224 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*hdr), flags); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 5225 | if (!nlh) |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 5226 | return -EMSGSIZE; |
| 5227 | |
| 5228 | hdr = nlmsg_data(nlh); |
| 5229 | hdr->ifi_family = AF_INET6; |
| 5230 | hdr->__ifi_pad = 0; |
| 5231 | hdr->ifi_type = dev->type; |
| 5232 | hdr->ifi_index = dev->ifindex; |
| 5233 | hdr->ifi_flags = dev_get_flags(dev); |
| 5234 | hdr->ifi_change = 0; |
| 5235 | |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 5236 | if (nla_put_string(skb, IFLA_IFNAME, dev->name) || |
| 5237 | (dev->addr_len && |
| 5238 | nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || |
| 5239 | nla_put_u32(skb, IFLA_MTU, dev->mtu) || |
Nicolas Dichtel | a54acb3 | 2015-04-02 17:07:00 +0200 | [diff] [blame] | 5240 | (dev->ifindex != dev_get_iflink(dev) && |
Andy Gospodarek | 0344338 | 2015-08-13 15:26:35 -0400 | [diff] [blame] | 5241 | nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) || |
| 5242 | nla_put_u8(skb, IFLA_OPERSTATE, |
| 5243 | netif_running(dev) ? dev->operstate : IF_OPER_DOWN)) |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 5244 | goto nla_put_failure; |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 5245 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 5246 | if (!protoinfo) |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 5247 | goto nla_put_failure; |
| 5248 | |
Sowmini Varadhan | d5566fd | 2015-09-11 16:48:48 -0400 | [diff] [blame] | 5249 | if (inet6_fill_ifla6_attrs(skb, idev, 0) < 0) |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 5250 | goto nla_put_failure; |
| 5251 | |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 5252 | nla_nest_end(skb, protoinfo); |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 5253 | nlmsg_end(skb, nlh); |
| 5254 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5255 | |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 5256 | nla_put_failure: |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 5257 | nlmsg_cancel(skb, nlh); |
| 5258 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5259 | } |
| 5260 | |
| 5261 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) |
| 5262 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 5263 | struct net *net = sock_net(skb->sk); |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 5264 | int h, s_h; |
David S. Miller | 434a8a5 | 2009-11-11 18:53:00 -0800 | [diff] [blame] | 5265 | int idx = 0, s_idx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5266 | struct net_device *dev; |
| 5267 | struct inet6_dev *idev; |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 5268 | struct hlist_head *head; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5269 | |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 5270 | s_h = cb->args[0]; |
| 5271 | s_idx = cb->args[1]; |
| 5272 | |
| 5273 | rcu_read_lock(); |
| 5274 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
| 5275 | idx = 0; |
| 5276 | head = &net->dev_index_head[h]; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 5277 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 5278 | if (idx < s_idx) |
| 5279 | goto cont; |
| 5280 | idev = __in6_dev_get(dev); |
| 5281 | if (!idev) |
| 5282 | goto cont; |
| 5283 | if (inet6_fill_ifinfo(skb, idev, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 5284 | NETLINK_CB(cb->skb).portid, |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 5285 | cb->nlh->nlmsg_seq, |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 5286 | RTM_NEWLINK, NLM_F_MULTI) < 0) |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 5287 | goto out; |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 5288 | cont: |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 5289 | idx++; |
| 5290 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5291 | } |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 5292 | out: |
| 5293 | rcu_read_unlock(); |
| 5294 | cb->args[1] = idx; |
| 5295 | cb->args[0] = h; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5296 | |
| 5297 | return skb->len; |
| 5298 | } |
| 5299 | |
| 5300 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) |
| 5301 | { |
| 5302 | struct sk_buff *skb; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 5303 | struct net *net = dev_net(idev->dev); |
Thomas Graf | 8d7a76c | 2006-08-15 00:35:47 -0700 | [diff] [blame] | 5304 | int err = -ENOBUFS; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 5305 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 5306 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 5307 | if (!skb) |
Thomas Graf | 8d7a76c | 2006-08-15 00:35:47 -0700 | [diff] [blame] | 5308 | goto errout; |
| 5309 | |
| 5310 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 5311 | if (err < 0) { |
| 5312 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ |
| 5313 | WARN_ON(err == -EMSGSIZE); |
| 5314 | kfree_skb(skb); |
| 5315 | goto errout; |
| 5316 | } |
Nicolas Dichtel | 5f75a10 | 2010-12-07 23:38:31 +0000 | [diff] [blame] | 5317 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC); |
Pablo Neira Ayuso | 1ce85fe | 2009-02-24 23:18:28 -0800 | [diff] [blame] | 5318 | return; |
Thomas Graf | 8d7a76c | 2006-08-15 00:35:47 -0700 | [diff] [blame] | 5319 | errout: |
| 5320 | if (err < 0) |
Nicolas Dichtel | 5f75a10 | 2010-12-07 23:38:31 +0000 | [diff] [blame] | 5321 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5322 | } |
| 5323 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 5324 | static inline size_t inet6_prefix_nlmsg_size(void) |
| 5325 | { |
| 5326 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) |
| 5327 | + nla_total_size(sizeof(struct in6_addr)) |
| 5328 | + nla_total_size(sizeof(struct prefix_cacheinfo)); |
| 5329 | } |
YOSHIFUJI Hideaki | c5396a3 | 2006-06-17 22:48:48 -0700 | [diff] [blame] | 5330 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5331 | 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] | 5332 | struct prefix_info *pinfo, u32 portid, u32 seq, |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 5333 | int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5334 | { |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 5335 | struct prefixmsg *pmsg; |
| 5336 | struct nlmsghdr *nlh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5337 | struct prefix_cacheinfo ci; |
| 5338 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 5339 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*pmsg), flags); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 5340 | if (!nlh) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 5341 | return -EMSGSIZE; |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 5342 | |
| 5343 | pmsg = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5344 | pmsg->prefix_family = AF_INET6; |
Patrick McHardy | 8a47077 | 2005-06-28 12:56:45 -0700 | [diff] [blame] | 5345 | pmsg->prefix_pad1 = 0; |
| 5346 | pmsg->prefix_pad2 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5347 | pmsg->prefix_ifindex = idev->dev->ifindex; |
| 5348 | pmsg->prefix_len = pinfo->prefix_len; |
| 5349 | pmsg->prefix_type = pinfo->type; |
Patrick McHardy | 8a47077 | 2005-06-28 12:56:45 -0700 | [diff] [blame] | 5350 | pmsg->prefix_pad3 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5351 | pmsg->prefix_flags = 0; |
| 5352 | if (pinfo->onlink) |
| 5353 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; |
| 5354 | if (pinfo->autoconf) |
| 5355 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; |
| 5356 | |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 5357 | if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix)) |
| 5358 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5359 | ci.preferred_time = ntohl(pinfo->prefered); |
| 5360 | ci.valid_time = ntohl(pinfo->valid); |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 5361 | if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci)) |
| 5362 | goto nla_put_failure; |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 5363 | nlmsg_end(skb, nlh); |
| 5364 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5365 | |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 5366 | nla_put_failure: |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 5367 | nlmsg_cancel(skb, nlh); |
| 5368 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5369 | } |
| 5370 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 5371 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5372 | struct prefix_info *pinfo) |
| 5373 | { |
| 5374 | struct sk_buff *skb; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 5375 | struct net *net = dev_net(idev->dev); |
Thomas Graf | 8c384bfa | 2006-08-15 00:36:07 -0700 | [diff] [blame] | 5376 | int err = -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5377 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 5378 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 5379 | if (!skb) |
Thomas Graf | 8c384bfa | 2006-08-15 00:36:07 -0700 | [diff] [blame] | 5380 | goto errout; |
| 5381 | |
| 5382 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 5383 | if (err < 0) { |
| 5384 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ |
| 5385 | WARN_ON(err == -EMSGSIZE); |
| 5386 | kfree_skb(skb); |
| 5387 | goto errout; |
| 5388 | } |
Pablo Neira Ayuso | 1ce85fe | 2009-02-24 23:18:28 -0800 | [diff] [blame] | 5389 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
| 5390 | return; |
Thomas Graf | 8c384bfa | 2006-08-15 00:36:07 -0700 | [diff] [blame] | 5391 | errout: |
| 5392 | if (err < 0) |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 5393 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5394 | } |
| 5395 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5396 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
| 5397 | { |
Nicolas Dichtel | 63998ac | 2013-03-22 06:28:43 +0000 | [diff] [blame] | 5398 | struct net *net = dev_net(ifp->idev->dev); |
| 5399 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 5400 | if (event) |
| 5401 | ASSERT_RTNL(); |
| 5402 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5403 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); |
| 5404 | |
| 5405 | switch (event) { |
| 5406 | case RTM_NEWADDR: |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 5407 | /* |
| 5408 | * If the address was optimistic |
| 5409 | * we inserted the route at the start of |
| 5410 | * our DAD process, so we don't need |
| 5411 | * to do it again |
| 5412 | */ |
| 5413 | if (!(ifp->rt->rt6i_node)) |
| 5414 | ip6_ins_rt(ifp->rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5415 | if (ifp->idev->cnf.forwarding) |
| 5416 | addrconf_join_anycast(ifp); |
Cong Wang | 7996c79 | 2013-05-22 05:41:06 +0000 | [diff] [blame] | 5417 | if (!ipv6_addr_any(&ifp->peer_addr)) |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 5418 | addrconf_prefix_route(&ifp->peer_addr, 128, |
| 5419 | ifp->idev->dev, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5420 | break; |
| 5421 | case RTM_DELADDR: |
| 5422 | if (ifp->idev->cnf.forwarding) |
| 5423 | addrconf_leave_anycast(ifp); |
| 5424 | addrconf_leave_solict(ifp->idev, &ifp->addr); |
Cong Wang | 7996c79 | 2013-05-22 05:41:06 +0000 | [diff] [blame] | 5425 | if (!ipv6_addr_any(&ifp->peer_addr)) { |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 5426 | struct rt6_info *rt; |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 5427 | |
Nicolas Dichtel | e7478df | 2014-09-03 23:59:22 +0200 | [diff] [blame] | 5428 | rt = addrconf_get_prefix_route(&ifp->peer_addr, 128, |
| 5429 | ifp->idev->dev, 0, 0); |
Martin KaFai Lau | 8e3d5be | 2015-09-15 14:30:08 -0700 | [diff] [blame] | 5430 | if (rt) |
| 5431 | ip6_del_rt(rt); |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 5432 | } |
David Ahern | 38bd10c | 2016-04-21 20:56:12 -0700 | [diff] [blame] | 5433 | if (ifp->rt) { |
| 5434 | dst_hold(&ifp->rt->dst); |
| 5435 | ip6_del_rt(ifp->rt); |
| 5436 | } |
Hannes Frederic Sowa | 705f1c8 | 2014-09-28 00:46:06 +0200 | [diff] [blame] | 5437 | rt_genid_bump_ipv6(net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5438 | break; |
| 5439 | } |
Nicolas Dichtel | 63998ac | 2013-03-22 06:28:43 +0000 | [diff] [blame] | 5440 | atomic_inc(&net->ipv6.dev_addr_genid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5441 | } |
| 5442 | |
| 5443 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
| 5444 | { |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 5445 | rcu_read_lock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5446 | if (likely(ifp->idev->dead == 0)) |
| 5447 | __ipv6_ifa_notify(event, ifp); |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 5448 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5449 | } |
| 5450 | |
| 5451 | #ifdef CONFIG_SYSCTL |
| 5452 | |
| 5453 | static |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 5454 | int addrconf_sysctl_forward(struct ctl_table *ctl, int write, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5455 | void __user *buffer, size_t *lenp, loff_t *ppos) |
| 5456 | { |
| 5457 | int *valp = ctl->data; |
| 5458 | int val = *valp; |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 5459 | loff_t pos = *ppos; |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 5460 | struct ctl_table lctl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5461 | int ret; |
| 5462 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 5463 | /* |
| 5464 | * ctl->data points to idev->cnf.forwarding, we should |
| 5465 | * not modify it until we get the rtnl lock. |
| 5466 | */ |
| 5467 | lctl = *ctl; |
| 5468 | lctl.data = &val; |
| 5469 | |
| 5470 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5471 | |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 5472 | if (write) |
Stephen Hemminger | b325fdd | 2009-02-26 06:55:31 +0000 | [diff] [blame] | 5473 | ret = addrconf_fixup_forwarding(ctl, valp, val); |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 5474 | if (ret) |
| 5475 | *ppos = pos; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 5476 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5477 | } |
| 5478 | |
Marcelo Leitner | 7775142 | 2015-02-23 11:17:13 -0300 | [diff] [blame] | 5479 | static |
| 5480 | int addrconf_sysctl_mtu(struct ctl_table *ctl, int write, |
| 5481 | void __user *buffer, size_t *lenp, loff_t *ppos) |
| 5482 | { |
| 5483 | struct inet6_dev *idev = ctl->extra1; |
| 5484 | int min_mtu = IPV6_MIN_MTU; |
| 5485 | struct ctl_table lctl; |
| 5486 | |
| 5487 | lctl = *ctl; |
| 5488 | lctl.extra1 = &min_mtu; |
| 5489 | lctl.extra2 = idev ? &idev->dev->mtu : NULL; |
| 5490 | |
| 5491 | return proc_dointvec_minmax(&lctl, write, buffer, lenp, ppos); |
| 5492 | } |
| 5493 | |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5494 | static void dev_disable_change(struct inet6_dev *idev) |
| 5495 | { |
Cong Wang | 75538c2 | 2013-05-29 11:30:50 +0800 | [diff] [blame] | 5496 | struct netdev_notifier_info info; |
| 5497 | |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5498 | if (!idev || !idev->dev) |
| 5499 | return; |
| 5500 | |
Cong Wang | 75538c2 | 2013-05-29 11:30:50 +0800 | [diff] [blame] | 5501 | netdev_notifier_info_init(&info, idev->dev); |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5502 | if (idev->cnf.disable_ipv6) |
Cong Wang | 75538c2 | 2013-05-29 11:30:50 +0800 | [diff] [blame] | 5503 | addrconf_notify(NULL, NETDEV_DOWN, &info); |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5504 | else |
Cong Wang | 75538c2 | 2013-05-29 11:30:50 +0800 | [diff] [blame] | 5505 | addrconf_notify(NULL, NETDEV_UP, &info); |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5506 | } |
| 5507 | |
| 5508 | static void addrconf_disable_change(struct net *net, __s32 newf) |
| 5509 | { |
| 5510 | struct net_device *dev; |
| 5511 | struct inet6_dev *idev; |
| 5512 | |
Eric Dumazet | c6d14c8 | 2009-11-04 05:43:23 -0800 | [diff] [blame] | 5513 | rcu_read_lock(); |
| 5514 | for_each_netdev_rcu(net, dev) { |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5515 | idev = __in6_dev_get(dev); |
| 5516 | if (idev) { |
| 5517 | int changed = (!idev->cnf.disable_ipv6) ^ (!newf); |
| 5518 | idev->cnf.disable_ipv6 = newf; |
| 5519 | if (changed) |
| 5520 | dev_disable_change(idev); |
| 5521 | } |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5522 | } |
Eric Dumazet | c6d14c8 | 2009-11-04 05:43:23 -0800 | [diff] [blame] | 5523 | rcu_read_unlock(); |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5524 | } |
| 5525 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 5526 | 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] | 5527 | { |
| 5528 | struct net *net; |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 5529 | int old; |
| 5530 | |
| 5531 | if (!rtnl_trylock()) |
| 5532 | return restart_syscall(); |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5533 | |
| 5534 | net = (struct net *)table->extra2; |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 5535 | old = *p; |
| 5536 | *p = newf; |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5537 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 5538 | if (p == &net->ipv6.devconf_dflt->disable_ipv6) { |
| 5539 | rtnl_unlock(); |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5540 | return 0; |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 5541 | } |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5542 | |
| 5543 | if (p == &net->ipv6.devconf_all->disable_ipv6) { |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5544 | net->ipv6.devconf_dflt->disable_ipv6 = newf; |
| 5545 | addrconf_disable_change(net, newf); |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 5546 | } else if ((!newf) ^ (!old)) |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5547 | dev_disable_change((struct inet6_dev *)table->extra1); |
| 5548 | |
| 5549 | rtnl_unlock(); |
| 5550 | return 0; |
| 5551 | } |
| 5552 | |
| 5553 | static |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 5554 | int addrconf_sysctl_disable(struct ctl_table *ctl, int write, |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5555 | void __user *buffer, size_t *lenp, loff_t *ppos) |
| 5556 | { |
| 5557 | int *valp = ctl->data; |
| 5558 | int val = *valp; |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 5559 | loff_t pos = *ppos; |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 5560 | struct ctl_table lctl; |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5561 | int ret; |
| 5562 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 5563 | /* |
| 5564 | * ctl->data points to idev->cnf.disable_ipv6, we should |
| 5565 | * not modify it until we get the rtnl lock. |
| 5566 | */ |
| 5567 | lctl = *ctl; |
| 5568 | lctl.data = &val; |
| 5569 | |
| 5570 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5571 | |
| 5572 | if (write) |
| 5573 | ret = addrconf_disable_ipv6(ctl, valp, val); |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 5574 | if (ret) |
| 5575 | *ppos = pos; |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 5576 | return ret; |
| 5577 | } |
| 5578 | |
stephen hemminger | c92d549 | 2013-12-17 22:37:14 -0800 | [diff] [blame] | 5579 | static |
| 5580 | int addrconf_sysctl_proxy_ndp(struct ctl_table *ctl, int write, |
| 5581 | void __user *buffer, size_t *lenp, loff_t *ppos) |
| 5582 | { |
| 5583 | int *valp = ctl->data; |
| 5584 | int ret; |
| 5585 | int old, new; |
| 5586 | |
| 5587 | old = *valp; |
| 5588 | ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
| 5589 | new = *valp; |
| 5590 | |
| 5591 | if (write && old != new) { |
| 5592 | struct net *net = ctl->extra2; |
| 5593 | |
| 5594 | if (!rtnl_trylock()) |
| 5595 | return restart_syscall(); |
| 5596 | |
| 5597 | if (valp == &net->ipv6.devconf_dflt->proxy_ndp) |
| 5598 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, |
| 5599 | NETCONFA_IFINDEX_DEFAULT, |
| 5600 | net->ipv6.devconf_dflt); |
| 5601 | else if (valp == &net->ipv6.devconf_all->proxy_ndp) |
| 5602 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, |
| 5603 | NETCONFA_IFINDEX_ALL, |
| 5604 | net->ipv6.devconf_all); |
| 5605 | else { |
| 5606 | struct inet6_dev *idev = ctl->extra1; |
| 5607 | |
| 5608 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, |
| 5609 | idev->dev->ifindex, |
| 5610 | &idev->cnf); |
| 5611 | } |
| 5612 | rtnl_unlock(); |
| 5613 | } |
| 5614 | |
| 5615 | return ret; |
| 5616 | } |
| 5617 | |
Hannes Frederic Sowa | 3d1bec9 | 2015-03-23 23:36:00 +0100 | [diff] [blame] | 5618 | static int addrconf_sysctl_stable_secret(struct ctl_table *ctl, int write, |
| 5619 | void __user *buffer, size_t *lenp, |
| 5620 | loff_t *ppos) |
| 5621 | { |
| 5622 | int err; |
| 5623 | struct in6_addr addr; |
| 5624 | char str[IPV6_MAX_STRLEN]; |
| 5625 | struct ctl_table lctl = *ctl; |
Hannes Frederic Sowa | 622c81d5 | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 5626 | struct net *net = ctl->extra2; |
Hannes Frederic Sowa | 3d1bec9 | 2015-03-23 23:36:00 +0100 | [diff] [blame] | 5627 | struct ipv6_stable_secret *secret = ctl->data; |
| 5628 | |
Hannes Frederic Sowa | 622c81d5 | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 5629 | if (&net->ipv6.devconf_all->stable_secret == ctl->data) |
| 5630 | return -EIO; |
| 5631 | |
Hannes Frederic Sowa | 3d1bec9 | 2015-03-23 23:36:00 +0100 | [diff] [blame] | 5632 | lctl.maxlen = IPV6_MAX_STRLEN; |
| 5633 | lctl.data = str; |
| 5634 | |
| 5635 | if (!rtnl_trylock()) |
| 5636 | return restart_syscall(); |
| 5637 | |
| 5638 | if (!write && !secret->initialized) { |
| 5639 | err = -EIO; |
| 5640 | goto out; |
| 5641 | } |
| 5642 | |
WANG Cong | 5449a5c | 2015-12-21 10:55:45 -0800 | [diff] [blame] | 5643 | err = snprintf(str, sizeof(str), "%pI6", &secret->secret); |
| 5644 | if (err >= sizeof(str)) { |
| 5645 | err = -EIO; |
| 5646 | goto out; |
Hannes Frederic Sowa | 3d1bec9 | 2015-03-23 23:36:00 +0100 | [diff] [blame] | 5647 | } |
| 5648 | |
| 5649 | err = proc_dostring(&lctl, write, buffer, lenp, ppos); |
| 5650 | if (err || !write) |
| 5651 | goto out; |
| 5652 | |
| 5653 | if (in6_pton(str, -1, addr.in6_u.u6_addr8, -1, NULL) != 1) { |
| 5654 | err = -EIO; |
| 5655 | goto out; |
| 5656 | } |
| 5657 | |
| 5658 | secret->initialized = true; |
| 5659 | secret->secret = addr; |
| 5660 | |
Hannes Frederic Sowa | 622c81d5 | 2015-03-23 23:36:01 +0100 | [diff] [blame] | 5661 | if (&net->ipv6.devconf_dflt->stable_secret == ctl->data) { |
| 5662 | struct net_device *dev; |
| 5663 | |
| 5664 | for_each_netdev(net, dev) { |
| 5665 | struct inet6_dev *idev = __in6_dev_get(dev); |
| 5666 | |
| 5667 | if (idev) { |
| 5668 | idev->addr_gen_mode = |
| 5669 | IN6_ADDR_GEN_MODE_STABLE_PRIVACY; |
| 5670 | } |
| 5671 | } |
| 5672 | } else { |
| 5673 | struct inet6_dev *idev = ctl->extra1; |
| 5674 | |
| 5675 | idev->addr_gen_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY; |
| 5676 | } |
| 5677 | |
Hannes Frederic Sowa | 3d1bec9 | 2015-03-23 23:36:00 +0100 | [diff] [blame] | 5678 | out: |
| 5679 | rtnl_unlock(); |
| 5680 | |
| 5681 | return err; |
| 5682 | } |
stephen hemminger | c92d549 | 2013-12-17 22:37:14 -0800 | [diff] [blame] | 5683 | |
Andy Gospodarek | 35103d1 | 2015-08-13 10:39:01 -0400 | [diff] [blame] | 5684 | static |
| 5685 | int addrconf_sysctl_ignore_routes_with_linkdown(struct ctl_table *ctl, |
| 5686 | int write, |
| 5687 | void __user *buffer, |
| 5688 | size_t *lenp, |
| 5689 | loff_t *ppos) |
| 5690 | { |
| 5691 | int *valp = ctl->data; |
| 5692 | int val = *valp; |
| 5693 | loff_t pos = *ppos; |
| 5694 | struct ctl_table lctl; |
| 5695 | int ret; |
| 5696 | |
| 5697 | /* ctl->data points to idev->cnf.ignore_routes_when_linkdown |
| 5698 | * we should not modify it until we get the rtnl lock. |
| 5699 | */ |
| 5700 | lctl = *ctl; |
| 5701 | lctl.data = &val; |
| 5702 | |
| 5703 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); |
| 5704 | |
| 5705 | if (write) |
| 5706 | ret = addrconf_fixup_linkdown(ctl, valp, val); |
| 5707 | if (ret) |
| 5708 | *ppos = pos; |
| 5709 | return ret; |
| 5710 | } |
| 5711 | |
Maciej Żenczykowski | cb4a4c6 | 2016-10-07 01:00:49 -0700 | [diff] [blame] | 5712 | static int minus_one = -1; |
Maciej Żenczykowski | cb9e684 | 2016-09-29 00:33:43 -0700 | [diff] [blame] | 5713 | static const int one = 1; |
| 5714 | static const int two_five_five = 255; |
| 5715 | |
Konstantin Khlebnikov | 607ea7c | 2016-04-18 14:41:10 +0300 | [diff] [blame] | 5716 | static const struct ctl_table addrconf_sysctl[] = { |
Konstantin Khlebnikov | 5df1f77 | 2016-04-18 14:41:17 +0300 | [diff] [blame] | 5717 | { |
| 5718 | .procname = "forwarding", |
| 5719 | .data = &ipv6_devconf.forwarding, |
| 5720 | .maxlen = sizeof(int), |
| 5721 | .mode = 0644, |
| 5722 | .proc_handler = addrconf_sysctl_forward, |
| 5723 | }, |
| 5724 | { |
| 5725 | .procname = "hop_limit", |
| 5726 | .data = &ipv6_devconf.hop_limit, |
| 5727 | .maxlen = sizeof(int), |
| 5728 | .mode = 0644, |
Maciej Żenczykowski | cb9e684 | 2016-09-29 00:33:43 -0700 | [diff] [blame] | 5729 | .proc_handler = proc_dointvec_minmax, |
| 5730 | .extra1 = (void *)&one, |
| 5731 | .extra2 = (void *)&two_five_five, |
Konstantin Khlebnikov | 5df1f77 | 2016-04-18 14:41:17 +0300 | [diff] [blame] | 5732 | }, |
| 5733 | { |
| 5734 | .procname = "mtu", |
| 5735 | .data = &ipv6_devconf.mtu6, |
| 5736 | .maxlen = sizeof(int), |
| 5737 | .mode = 0644, |
| 5738 | .proc_handler = addrconf_sysctl_mtu, |
| 5739 | }, |
| 5740 | { |
| 5741 | .procname = "accept_ra", |
| 5742 | .data = &ipv6_devconf.accept_ra, |
| 5743 | .maxlen = sizeof(int), |
| 5744 | .mode = 0644, |
| 5745 | .proc_handler = proc_dointvec, |
| 5746 | }, |
| 5747 | { |
| 5748 | .procname = "accept_redirects", |
| 5749 | .data = &ipv6_devconf.accept_redirects, |
| 5750 | .maxlen = sizeof(int), |
| 5751 | .mode = 0644, |
| 5752 | .proc_handler = proc_dointvec, |
| 5753 | }, |
| 5754 | { |
| 5755 | .procname = "autoconf", |
| 5756 | .data = &ipv6_devconf.autoconf, |
| 5757 | .maxlen = sizeof(int), |
| 5758 | .mode = 0644, |
| 5759 | .proc_handler = proc_dointvec, |
| 5760 | }, |
| 5761 | { |
| 5762 | .procname = "dad_transmits", |
| 5763 | .data = &ipv6_devconf.dad_transmits, |
| 5764 | .maxlen = sizeof(int), |
| 5765 | .mode = 0644, |
| 5766 | .proc_handler = proc_dointvec, |
| 5767 | }, |
| 5768 | { |
| 5769 | .procname = "router_solicitations", |
| 5770 | .data = &ipv6_devconf.rtr_solicits, |
| 5771 | .maxlen = sizeof(int), |
| 5772 | .mode = 0644, |
Maciej Żenczykowski | cb4a4c6 | 2016-10-07 01:00:49 -0700 | [diff] [blame] | 5773 | .proc_handler = proc_dointvec_minmax, |
| 5774 | .extra1 = &minus_one, |
Konstantin Khlebnikov | 5df1f77 | 2016-04-18 14:41:17 +0300 | [diff] [blame] | 5775 | }, |
| 5776 | { |
| 5777 | .procname = "router_solicitation_interval", |
| 5778 | .data = &ipv6_devconf.rtr_solicit_interval, |
| 5779 | .maxlen = sizeof(int), |
| 5780 | .mode = 0644, |
| 5781 | .proc_handler = proc_dointvec_jiffies, |
| 5782 | }, |
| 5783 | { |
Maciej Żenczykowski | bd11f07 | 2016-09-27 23:57:58 -0700 | [diff] [blame] | 5784 | .procname = "router_solicitation_max_interval", |
| 5785 | .data = &ipv6_devconf.rtr_solicit_max_interval, |
| 5786 | .maxlen = sizeof(int), |
| 5787 | .mode = 0644, |
| 5788 | .proc_handler = proc_dointvec_jiffies, |
| 5789 | }, |
| 5790 | { |
Konstantin Khlebnikov | 5df1f77 | 2016-04-18 14:41:17 +0300 | [diff] [blame] | 5791 | .procname = "router_solicitation_delay", |
| 5792 | .data = &ipv6_devconf.rtr_solicit_delay, |
| 5793 | .maxlen = sizeof(int), |
| 5794 | .mode = 0644, |
| 5795 | .proc_handler = proc_dointvec_jiffies, |
| 5796 | }, |
| 5797 | { |
| 5798 | .procname = "force_mld_version", |
| 5799 | .data = &ipv6_devconf.force_mld_version, |
| 5800 | .maxlen = sizeof(int), |
| 5801 | .mode = 0644, |
| 5802 | .proc_handler = proc_dointvec, |
| 5803 | }, |
| 5804 | { |
| 5805 | .procname = "mldv1_unsolicited_report_interval", |
| 5806 | .data = |
| 5807 | &ipv6_devconf.mldv1_unsolicited_report_interval, |
| 5808 | .maxlen = sizeof(int), |
| 5809 | .mode = 0644, |
| 5810 | .proc_handler = proc_dointvec_ms_jiffies, |
| 5811 | }, |
| 5812 | { |
| 5813 | .procname = "mldv2_unsolicited_report_interval", |
| 5814 | .data = |
| 5815 | &ipv6_devconf.mldv2_unsolicited_report_interval, |
| 5816 | .maxlen = sizeof(int), |
| 5817 | .mode = 0644, |
| 5818 | .proc_handler = proc_dointvec_ms_jiffies, |
| 5819 | }, |
| 5820 | { |
| 5821 | .procname = "use_tempaddr", |
| 5822 | .data = &ipv6_devconf.use_tempaddr, |
| 5823 | .maxlen = sizeof(int), |
| 5824 | .mode = 0644, |
| 5825 | .proc_handler = proc_dointvec, |
| 5826 | }, |
| 5827 | { |
| 5828 | .procname = "temp_valid_lft", |
| 5829 | .data = &ipv6_devconf.temp_valid_lft, |
| 5830 | .maxlen = sizeof(int), |
| 5831 | .mode = 0644, |
| 5832 | .proc_handler = proc_dointvec, |
| 5833 | }, |
| 5834 | { |
| 5835 | .procname = "temp_prefered_lft", |
| 5836 | .data = &ipv6_devconf.temp_prefered_lft, |
| 5837 | .maxlen = sizeof(int), |
| 5838 | .mode = 0644, |
| 5839 | .proc_handler = proc_dointvec, |
| 5840 | }, |
| 5841 | { |
| 5842 | .procname = "regen_max_retry", |
| 5843 | .data = &ipv6_devconf.regen_max_retry, |
| 5844 | .maxlen = sizeof(int), |
| 5845 | .mode = 0644, |
| 5846 | .proc_handler = proc_dointvec, |
| 5847 | }, |
| 5848 | { |
| 5849 | .procname = "max_desync_factor", |
| 5850 | .data = &ipv6_devconf.max_desync_factor, |
| 5851 | .maxlen = sizeof(int), |
| 5852 | .mode = 0644, |
| 5853 | .proc_handler = proc_dointvec, |
| 5854 | }, |
| 5855 | { |
| 5856 | .procname = "max_addresses", |
| 5857 | .data = &ipv6_devconf.max_addresses, |
| 5858 | .maxlen = sizeof(int), |
| 5859 | .mode = 0644, |
| 5860 | .proc_handler = proc_dointvec, |
| 5861 | }, |
| 5862 | { |
| 5863 | .procname = "accept_ra_defrtr", |
| 5864 | .data = &ipv6_devconf.accept_ra_defrtr, |
| 5865 | .maxlen = sizeof(int), |
| 5866 | .mode = 0644, |
| 5867 | .proc_handler = proc_dointvec, |
| 5868 | }, |
| 5869 | { |
| 5870 | .procname = "accept_ra_min_hop_limit", |
| 5871 | .data = &ipv6_devconf.accept_ra_min_hop_limit, |
| 5872 | .maxlen = sizeof(int), |
| 5873 | .mode = 0644, |
| 5874 | .proc_handler = proc_dointvec, |
| 5875 | }, |
| 5876 | { |
| 5877 | .procname = "accept_ra_pinfo", |
| 5878 | .data = &ipv6_devconf.accept_ra_pinfo, |
| 5879 | .maxlen = sizeof(int), |
| 5880 | .mode = 0644, |
| 5881 | .proc_handler = proc_dointvec, |
| 5882 | }, |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 5883 | #ifdef CONFIG_IPV6_ROUTER_PREF |
Konstantin Khlebnikov | 5df1f77 | 2016-04-18 14:41:17 +0300 | [diff] [blame] | 5884 | { |
| 5885 | .procname = "accept_ra_rtr_pref", |
| 5886 | .data = &ipv6_devconf.accept_ra_rtr_pref, |
| 5887 | .maxlen = sizeof(int), |
| 5888 | .mode = 0644, |
| 5889 | .proc_handler = proc_dointvec, |
| 5890 | }, |
| 5891 | { |
| 5892 | .procname = "router_probe_interval", |
| 5893 | .data = &ipv6_devconf.rtr_probe_interval, |
| 5894 | .maxlen = sizeof(int), |
| 5895 | .mode = 0644, |
| 5896 | .proc_handler = proc_dointvec_jiffies, |
| 5897 | }, |
Neil Horman | fa03ef3 | 2007-01-30 14:30:10 -0800 | [diff] [blame] | 5898 | #ifdef CONFIG_IPV6_ROUTE_INFO |
Konstantin Khlebnikov | 5df1f77 | 2016-04-18 14:41:17 +0300 | [diff] [blame] | 5899 | { |
| 5900 | .procname = "accept_ra_rt_info_max_plen", |
| 5901 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, |
| 5902 | .maxlen = sizeof(int), |
| 5903 | .mode = 0644, |
| 5904 | .proc_handler = proc_dointvec, |
| 5905 | }, |
YOSHIFUJI Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 5906 | #endif |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 5907 | #endif |
Konstantin Khlebnikov | 5df1f77 | 2016-04-18 14:41:17 +0300 | [diff] [blame] | 5908 | { |
| 5909 | .procname = "proxy_ndp", |
| 5910 | .data = &ipv6_devconf.proxy_ndp, |
| 5911 | .maxlen = sizeof(int), |
| 5912 | .mode = 0644, |
| 5913 | .proc_handler = addrconf_sysctl_proxy_ndp, |
| 5914 | }, |
| 5915 | { |
| 5916 | .procname = "accept_source_route", |
| 5917 | .data = &ipv6_devconf.accept_source_route, |
| 5918 | .maxlen = sizeof(int), |
| 5919 | .mode = 0644, |
| 5920 | .proc_handler = proc_dointvec, |
| 5921 | }, |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 5922 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
Konstantin Khlebnikov | 5df1f77 | 2016-04-18 14:41:17 +0300 | [diff] [blame] | 5923 | { |
| 5924 | .procname = "optimistic_dad", |
| 5925 | .data = &ipv6_devconf.optimistic_dad, |
| 5926 | .maxlen = sizeof(int), |
| 5927 | .mode = 0644, |
| 5928 | .proc_handler = proc_dointvec, |
| 5929 | }, |
| 5930 | { |
| 5931 | .procname = "use_optimistic", |
| 5932 | .data = &ipv6_devconf.use_optimistic, |
| 5933 | .maxlen = sizeof(int), |
| 5934 | .mode = 0644, |
| 5935 | .proc_handler = proc_dointvec, |
| 5936 | }, |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 5937 | #endif |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 5938 | #ifdef CONFIG_IPV6_MROUTE |
Konstantin Khlebnikov | 5df1f77 | 2016-04-18 14:41:17 +0300 | [diff] [blame] | 5939 | { |
| 5940 | .procname = "mc_forwarding", |
| 5941 | .data = &ipv6_devconf.mc_forwarding, |
| 5942 | .maxlen = sizeof(int), |
| 5943 | .mode = 0444, |
| 5944 | .proc_handler = proc_dointvec, |
| 5945 | }, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 5946 | #endif |
Konstantin Khlebnikov | 5df1f77 | 2016-04-18 14:41:17 +0300 | [diff] [blame] | 5947 | { |
| 5948 | .procname = "disable_ipv6", |
| 5949 | .data = &ipv6_devconf.disable_ipv6, |
| 5950 | .maxlen = sizeof(int), |
| 5951 | .mode = 0644, |
| 5952 | .proc_handler = addrconf_sysctl_disable, |
| 5953 | }, |
| 5954 | { |
| 5955 | .procname = "accept_dad", |
| 5956 | .data = &ipv6_devconf.accept_dad, |
| 5957 | .maxlen = sizeof(int), |
| 5958 | .mode = 0644, |
| 5959 | .proc_handler = proc_dointvec, |
| 5960 | }, |
| 5961 | { |
| 5962 | .procname = "force_tllao", |
| 5963 | .data = &ipv6_devconf.force_tllao, |
| 5964 | .maxlen = sizeof(int), |
| 5965 | .mode = 0644, |
| 5966 | .proc_handler = proc_dointvec |
| 5967 | }, |
| 5968 | { |
| 5969 | .procname = "ndisc_notify", |
| 5970 | .data = &ipv6_devconf.ndisc_notify, |
| 5971 | .maxlen = sizeof(int), |
| 5972 | .mode = 0644, |
| 5973 | .proc_handler = proc_dointvec |
| 5974 | }, |
| 5975 | { |
| 5976 | .procname = "suppress_frag_ndisc", |
| 5977 | .data = &ipv6_devconf.suppress_frag_ndisc, |
| 5978 | .maxlen = sizeof(int), |
| 5979 | .mode = 0644, |
| 5980 | .proc_handler = proc_dointvec |
| 5981 | }, |
| 5982 | { |
| 5983 | .procname = "accept_ra_from_local", |
| 5984 | .data = &ipv6_devconf.accept_ra_from_local, |
| 5985 | .maxlen = sizeof(int), |
| 5986 | .mode = 0644, |
| 5987 | .proc_handler = proc_dointvec, |
| 5988 | }, |
| 5989 | { |
| 5990 | .procname = "accept_ra_mtu", |
| 5991 | .data = &ipv6_devconf.accept_ra_mtu, |
| 5992 | .maxlen = sizeof(int), |
| 5993 | .mode = 0644, |
| 5994 | .proc_handler = proc_dointvec, |
| 5995 | }, |
| 5996 | { |
| 5997 | .procname = "stable_secret", |
| 5998 | .data = &ipv6_devconf.stable_secret, |
| 5999 | .maxlen = IPV6_MAX_STRLEN, |
| 6000 | .mode = 0600, |
| 6001 | .proc_handler = addrconf_sysctl_stable_secret, |
| 6002 | }, |
| 6003 | { |
| 6004 | .procname = "use_oif_addrs_only", |
| 6005 | .data = &ipv6_devconf.use_oif_addrs_only, |
| 6006 | .maxlen = sizeof(int), |
| 6007 | .mode = 0644, |
| 6008 | .proc_handler = proc_dointvec, |
| 6009 | }, |
| 6010 | { |
| 6011 | .procname = "ignore_routes_with_linkdown", |
| 6012 | .data = &ipv6_devconf.ignore_routes_with_linkdown, |
| 6013 | .maxlen = sizeof(int), |
| 6014 | .mode = 0644, |
| 6015 | .proc_handler = addrconf_sysctl_ignore_routes_with_linkdown, |
| 6016 | }, |
| 6017 | { |
| 6018 | .procname = "drop_unicast_in_l2_multicast", |
| 6019 | .data = &ipv6_devconf.drop_unicast_in_l2_multicast, |
| 6020 | .maxlen = sizeof(int), |
| 6021 | .mode = 0644, |
| 6022 | .proc_handler = proc_dointvec, |
| 6023 | }, |
| 6024 | { |
| 6025 | .procname = "drop_unsolicited_na", |
| 6026 | .data = &ipv6_devconf.drop_unsolicited_na, |
| 6027 | .maxlen = sizeof(int), |
| 6028 | .mode = 0644, |
| 6029 | .proc_handler = proc_dointvec, |
| 6030 | }, |
| 6031 | { |
| 6032 | .procname = "keep_addr_on_down", |
| 6033 | .data = &ipv6_devconf.keep_addr_on_down, |
| 6034 | .maxlen = sizeof(int), |
| 6035 | .mode = 0644, |
| 6036 | .proc_handler = proc_dointvec, |
David Ahern | f1705ec | 2016-02-24 09:25:37 -0800 | [diff] [blame] | 6037 | |
Konstantin Khlebnikov | 5df1f77 | 2016-04-18 14:41:17 +0300 | [diff] [blame] | 6038 | }, |
| 6039 | { |
| 6040 | /* sentinel */ |
| 6041 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6042 | }; |
| 6043 | |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 6044 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 6045 | struct inet6_dev *idev, struct ipv6_devconf *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6046 | { |
Nicolas Dichtel | 29c994e | 2016-08-30 10:09:22 +0200 | [diff] [blame] | 6047 | int i, ifindex; |
Konstantin Khlebnikov | 607ea7c | 2016-04-18 14:41:10 +0300 | [diff] [blame] | 6048 | struct ctl_table *table; |
Eric W. Biederman | 6105e29 | 2012-04-19 13:41:24 +0000 | [diff] [blame] | 6049 | char path[sizeof("net/ipv6/conf/") + IFNAMSIZ]; |
Pavel Emelyanov | 1dab622 | 2007-12-02 00:59:38 +1100 | [diff] [blame] | 6050 | |
Konstantin Khlebnikov | 607ea7c | 2016-04-18 14:41:10 +0300 | [diff] [blame] | 6051 | table = kmemdup(addrconf_sysctl, sizeof(addrconf_sysctl), GFP_KERNEL); |
| 6052 | if (!table) |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 6053 | goto out; |
| 6054 | |
Konstantin Khlebnikov | 607ea7c | 2016-04-18 14:41:10 +0300 | [diff] [blame] | 6055 | for (i = 0; table[i].data; i++) { |
| 6056 | table[i].data += (char *)p - (char *)&ipv6_devconf; |
Maciej Żenczykowski | cb9e684 | 2016-09-29 00:33:43 -0700 | [diff] [blame] | 6057 | /* If one of these is already set, then it is not safe to |
| 6058 | * overwrite either of them: this makes proc_dointvec_minmax |
| 6059 | * usable. |
| 6060 | */ |
| 6061 | if (!table[i].extra1 && !table[i].extra2) { |
| 6062 | table[i].extra1 = idev; /* embedded; no ref */ |
| 6063 | table[i].extra2 = net; |
| 6064 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6065 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6066 | |
Eric W. Biederman | 6105e29 | 2012-04-19 13:41:24 +0000 | [diff] [blame] | 6067 | snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6068 | |
Konstantin Khlebnikov | 607ea7c | 2016-04-18 14:41:10 +0300 | [diff] [blame] | 6069 | p->sysctl_header = register_net_sysctl(net, path, table); |
| 6070 | if (!p->sysctl_header) |
Eric W. Biederman | 6105e29 | 2012-04-19 13:41:24 +0000 | [diff] [blame] | 6071 | goto free; |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 6072 | |
Nicolas Dichtel | 29c994e | 2016-08-30 10:09:22 +0200 | [diff] [blame] | 6073 | if (!strcmp(dev_name, "all")) |
| 6074 | ifindex = NETCONFA_IFINDEX_ALL; |
| 6075 | else if (!strcmp(dev_name, "default")) |
| 6076 | ifindex = NETCONFA_IFINDEX_DEFAULT; |
| 6077 | else |
| 6078 | ifindex = idev->dev->ifindex; |
| 6079 | inet6_netconf_notify_devconf(net, NETCONFA_ALL, ifindex, p); |
Pavel Emelyanov | 9589731 | 2008-01-10 17:41:45 -0800 | [diff] [blame] | 6080 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6081 | |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 6082 | free: |
Konstantin Khlebnikov | 607ea7c | 2016-04-18 14:41:10 +0300 | [diff] [blame] | 6083 | kfree(table); |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 6084 | out: |
Pavel Emelyanov | 9589731 | 2008-01-10 17:41:45 -0800 | [diff] [blame] | 6085 | return -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6086 | } |
| 6087 | |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 6088 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
| 6089 | { |
Konstantin Khlebnikov | 607ea7c | 2016-04-18 14:41:10 +0300 | [diff] [blame] | 6090 | struct ctl_table *table; |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 6091 | |
Konstantin Khlebnikov | 607ea7c | 2016-04-18 14:41:10 +0300 | [diff] [blame] | 6092 | if (!p->sysctl_header) |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 6093 | return; |
| 6094 | |
Konstantin Khlebnikov | 607ea7c | 2016-04-18 14:41:10 +0300 | [diff] [blame] | 6095 | table = p->sysctl_header->ctl_table_arg; |
| 6096 | unregister_net_sysctl_table(p->sysctl_header); |
| 6097 | p->sysctl_header = NULL; |
| 6098 | kfree(table); |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 6099 | } |
| 6100 | |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 6101 | static int addrconf_sysctl_register(struct inet6_dev *idev) |
Pavel Emelyanov | f52295a | 2007-12-02 00:58:37 +1100 | [diff] [blame] | 6102 | { |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 6103 | int err; |
| 6104 | |
| 6105 | if (!sysctl_dev_name_is_allowed(idev->dev->name)) |
| 6106 | return -EINVAL; |
| 6107 | |
| 6108 | err = neigh_sysctl_register(idev->dev, idev->nd_parms, |
| 6109 | &ndisc_ifinfo_sysctl_change); |
| 6110 | if (err) |
| 6111 | return err; |
| 6112 | err = __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, |
| 6113 | idev, &idev->cnf); |
| 6114 | if (err) |
| 6115 | neigh_sysctl_unregister(idev->nd_parms); |
| 6116 | |
| 6117 | return err; |
Pavel Emelyanov | f52295a | 2007-12-02 00:58:37 +1100 | [diff] [blame] | 6118 | } |
| 6119 | |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 6120 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6121 | { |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 6122 | __addrconf_sysctl_unregister(&idev->cnf); |
| 6123 | neigh_sysctl_unregister(idev->nd_parms); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6124 | } |
| 6125 | |
| 6126 | |
| 6127 | #endif |
| 6128 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 6129 | static int __net_init addrconf_init_net(struct net *net) |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6130 | { |
Hong Zhiguo | a79ca22 | 2013-03-26 01:52:45 +0800 | [diff] [blame] | 6131 | int err = -ENOMEM; |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6132 | struct ipv6_devconf *all, *dflt; |
| 6133 | |
Hong Zhiguo | a79ca22 | 2013-03-26 01:52:45 +0800 | [diff] [blame] | 6134 | all = kmemdup(&ipv6_devconf, sizeof(ipv6_devconf), GFP_KERNEL); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 6135 | if (!all) |
Hong Zhiguo | a79ca22 | 2013-03-26 01:52:45 +0800 | [diff] [blame] | 6136 | goto err_alloc_all; |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6137 | |
Hong Zhiguo | a79ca22 | 2013-03-26 01:52:45 +0800 | [diff] [blame] | 6138 | dflt = kmemdup(&ipv6_devconf_dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 6139 | if (!dflt) |
Hong Zhiguo | a79ca22 | 2013-03-26 01:52:45 +0800 | [diff] [blame] | 6140 | goto err_alloc_dflt; |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6141 | |
Hong Zhiguo | a79ca22 | 2013-03-26 01:52:45 +0800 | [diff] [blame] | 6142 | /* these will be inherited by all namespaces */ |
| 6143 | dflt->autoconf = ipv6_defaults.autoconf; |
| 6144 | dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6145 | |
Hannes Frederic Sowa | 3d1bec9 | 2015-03-23 23:36:00 +0100 | [diff] [blame] | 6146 | dflt->stable_secret.initialized = false; |
| 6147 | all->stable_secret.initialized = false; |
| 6148 | |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6149 | net->ipv6.devconf_all = all; |
| 6150 | net->ipv6.devconf_dflt = dflt; |
| 6151 | |
| 6152 | #ifdef CONFIG_SYSCTL |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 6153 | err = __addrconf_sysctl_register(net, "all", NULL, all); |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6154 | if (err < 0) |
| 6155 | goto err_reg_all; |
| 6156 | |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 6157 | err = __addrconf_sysctl_register(net, "default", NULL, dflt); |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6158 | if (err < 0) |
| 6159 | goto err_reg_dflt; |
| 6160 | #endif |
| 6161 | return 0; |
| 6162 | |
| 6163 | #ifdef CONFIG_SYSCTL |
| 6164 | err_reg_dflt: |
| 6165 | __addrconf_sysctl_unregister(all); |
| 6166 | err_reg_all: |
| 6167 | kfree(dflt); |
| 6168 | #endif |
| 6169 | err_alloc_dflt: |
| 6170 | kfree(all); |
| 6171 | err_alloc_all: |
| 6172 | return err; |
| 6173 | } |
| 6174 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 6175 | static void __net_exit addrconf_exit_net(struct net *net) |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6176 | { |
| 6177 | #ifdef CONFIG_SYSCTL |
| 6178 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); |
| 6179 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); |
| 6180 | #endif |
zhuyj | 73cf0e92 | 2014-11-26 10:25:58 +0800 | [diff] [blame] | 6181 | kfree(net->ipv6.devconf_dflt); |
| 6182 | kfree(net->ipv6.devconf_all); |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6183 | } |
| 6184 | |
| 6185 | static struct pernet_operations addrconf_ops = { |
| 6186 | .init = addrconf_init_net, |
| 6187 | .exit = addrconf_exit_net, |
| 6188 | }; |
| 6189 | |
Daniel Borkmann | 207895fd3 | 2015-01-29 12:15:03 +0100 | [diff] [blame] | 6190 | static struct rtnl_af_ops inet6_ops __read_mostly = { |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 6191 | .family = AF_INET6, |
| 6192 | .fill_link_af = inet6_fill_link_af, |
| 6193 | .get_link_af_size = inet6_get_link_af_size, |
Daniel Borkmann | 11b1f82 | 2015-02-05 14:39:11 +0100 | [diff] [blame] | 6194 | .validate_link_af = inet6_validate_link_af, |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 6195 | .set_link_af = inet6_set_link_af, |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 6196 | }; |
| 6197 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6198 | /* |
| 6199 | * Init / cleanup code |
| 6200 | */ |
| 6201 | |
| 6202 | int __init addrconf_init(void) |
| 6203 | { |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 6204 | struct inet6_dev *idev; |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 6205 | int i, err; |
YOSHIFUJI Hideaki | 2a8cc6c | 2007-11-14 15:56:23 +0900 | [diff] [blame] | 6206 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 6207 | err = ipv6_addr_label_init(); |
| 6208 | if (err < 0) { |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 6209 | pr_crit("%s: cannot initialize default policy table: %d\n", |
| 6210 | __func__, err); |
Neil Horman | 2cc6d2b | 2010-09-24 09:55:52 +0000 | [diff] [blame] | 6211 | goto out; |
YOSHIFUJI Hideaki | 2a8cc6c | 2007-11-14 15:56:23 +0900 | [diff] [blame] | 6212 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6213 | |
Neil Horman | 2cc6d2b | 2010-09-24 09:55:52 +0000 | [diff] [blame] | 6214 | err = register_pernet_subsys(&addrconf_ops); |
| 6215 | if (err < 0) |
| 6216 | goto out_addrlabel; |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6217 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 6218 | addrconf_wq = create_workqueue("ipv6_addrconf"); |
| 6219 | if (!addrconf_wq) { |
| 6220 | err = -ENOMEM; |
| 6221 | goto out_nowq; |
| 6222 | } |
| 6223 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6224 | /* The addrconf netdev notifier requires that loopback_dev |
| 6225 | * has it's ipv6 private information allocated and setup |
| 6226 | * before it can bring up and give link-local addresses |
| 6227 | * to other devices which are up. |
| 6228 | * |
| 6229 | * Unfortunately, loopback_dev is not necessarily the first |
| 6230 | * entry in the global dev_base list of net devices. In fact, |
| 6231 | * it is likely to be the very last entry on that list. |
| 6232 | * So this causes the notifier registry below to try and |
| 6233 | * give link-local addresses to all devices besides loopback_dev |
| 6234 | * first, then loopback_dev, which cases all the non-loopback_dev |
| 6235 | * devices to fail to get a link-local address. |
| 6236 | * |
| 6237 | * So, as a temporary fix, allocate the ipv6 structure for |
| 6238 | * loopback_dev first by hand. |
| 6239 | * Longer term, all of the dependencies ipv6 has upon the loopback |
| 6240 | * device and it being up should be removed. |
| 6241 | */ |
| 6242 | rtnl_lock(); |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 6243 | idev = ipv6_add_dev(init_net.loopback_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6244 | rtnl_unlock(); |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 6245 | if (IS_ERR(idev)) { |
| 6246 | err = PTR_ERR(idev); |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6247 | goto errlo; |
WANG Cong | a317a2f | 2014-07-25 15:25:09 -0700 | [diff] [blame] | 6248 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6249 | |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 6250 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
| 6251 | INIT_HLIST_HEAD(&inet6_addr_lst[i]); |
| 6252 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6253 | register_netdevice_notifier(&ipv6_dev_notf); |
| 6254 | |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 6255 | addrconf_verify(); |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 6256 | |
stephen hemminger | 3678a9d | 2013-12-30 10:41:32 -0800 | [diff] [blame] | 6257 | rtnl_af_register(&inet6_ops); |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 6258 | |
Greg Rose | c7ac867 | 2011-06-10 01:27:09 +0000 | [diff] [blame] | 6259 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo, |
| 6260 | NULL); |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 6261 | if (err < 0) |
| 6262 | goto errout; |
| 6263 | |
| 6264 | /* Only the first call to __rtnl_register can fail */ |
Greg Rose | c7ac867 | 2011-06-10 01:27:09 +0000 | [diff] [blame] | 6265 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL); |
| 6266 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL); |
| 6267 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, |
| 6268 | inet6_dump_ifaddr, NULL); |
| 6269 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, |
| 6270 | inet6_dump_ifmcaddr, NULL); |
| 6271 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, |
| 6272 | inet6_dump_ifacaddr, NULL); |
Nicolas Dichtel | 76f8f6c | 2012-10-25 22:28:51 +0000 | [diff] [blame] | 6273 | __rtnl_register(PF_INET6, RTM_GETNETCONF, inet6_netconf_get_devconf, |
Nicolas Dichtel | 7a67420 | 2013-03-05 23:42:06 +0000 | [diff] [blame] | 6274 | inet6_netconf_dump_devconf, NULL); |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 6275 | |
YOSHIFUJI Hideaki | 2a8cc6c | 2007-11-14 15:56:23 +0900 | [diff] [blame] | 6276 | ipv6_addr_label_rtnl_register(); |
| 6277 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6278 | return 0; |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 6279 | errout: |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 6280 | rtnl_af_unregister(&inet6_ops); |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 6281 | unregister_netdevice_notifier(&ipv6_dev_notf); |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6282 | errlo: |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 6283 | destroy_workqueue(addrconf_wq); |
| 6284 | out_nowq: |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6285 | unregister_pernet_subsys(&addrconf_ops); |
Neil Horman | 2cc6d2b | 2010-09-24 09:55:52 +0000 | [diff] [blame] | 6286 | out_addrlabel: |
| 6287 | ipv6_addr_label_cleanup(); |
| 6288 | out: |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 6289 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6290 | } |
| 6291 | |
Daniel Lezcano | 09f7709 | 2007-12-13 05:34:58 -0800 | [diff] [blame] | 6292 | void addrconf_cleanup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6293 | { |
Daniel Lezcano | 176c39a | 2009-03-03 01:06:45 -0800 | [diff] [blame] | 6294 | struct net_device *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6295 | int i; |
| 6296 | |
| 6297 | unregister_netdevice_notifier(&ipv6_dev_notf); |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 6298 | unregister_pernet_subsys(&addrconf_ops); |
Neil Horman | 2cc6d2b | 2010-09-24 09:55:52 +0000 | [diff] [blame] | 6299 | ipv6_addr_label_cleanup(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6300 | |
| 6301 | rtnl_lock(); |
| 6302 | |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 6303 | __rtnl_af_unregister(&inet6_ops); |
| 6304 | |
Daniel Lezcano | 176c39a | 2009-03-03 01:06:45 -0800 | [diff] [blame] | 6305 | /* clean dev list */ |
| 6306 | for_each_netdev(&init_net, dev) { |
| 6307 | if (__in6_dev_get(dev) == NULL) |
| 6308 | continue; |
| 6309 | addrconf_ifdown(dev, 1); |
| 6310 | } |
| 6311 | addrconf_ifdown(init_net.loopback_dev, 2); |
| 6312 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6313 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6314 | * Check hash table. |
| 6315 | */ |
stephen hemminger | 5c578aed | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 6316 | spin_lock_bh(&addrconf_hash_lock); |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 6317 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
| 6318 | WARN_ON(!hlist_empty(&inet6_addr_lst[i])); |
stephen hemminger | 5c578aed | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 6319 | spin_unlock_bh(&addrconf_hash_lock); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 6320 | cancel_delayed_work(&addr_chk_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6321 | rtnl_unlock(); |
Hannes Frederic Sowa | c15b1cc | 2014-03-27 18:28:07 +0100 | [diff] [blame] | 6322 | |
| 6323 | destroy_workqueue(addrconf_wq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6324 | } |