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> |
| 49 | #include <linux/in6.h> |
| 50 | #include <linux/netdevice.h> |
Thomas Graf | 1823730 | 2006-08-04 23:04:54 -0700 | [diff] [blame] | 51 | #include <linux/if_addr.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | #include <linux/if_arp.h> |
| 53 | #include <linux/if_arcnet.h> |
| 54 | #include <linux/if_infiniband.h> |
| 55 | #include <linux/route.h> |
| 56 | #include <linux/inetdevice.h> |
| 57 | #include <linux/init.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 58 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | #ifdef CONFIG_SYSCTL |
| 60 | #include <linux/sysctl.h> |
| 61 | #endif |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 62 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | #include <linux/delay.h> |
| 64 | #include <linux/notifier.h> |
Paulo Marques | 543537b | 2005-06-23 00:09:02 -0700 | [diff] [blame] | 65 | #include <linux/string.h> |
Eric Dumazet | ddbe503 | 2012-07-18 08:11:12 +0000 | [diff] [blame] | 66 | #include <linux/hash.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 68 | #include <net/net_namespace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | #include <net/sock.h> |
| 70 | #include <net/snmp.h> |
| 71 | |
alex.bluesman.smirnov@gmail.com | 06a4c1c | 2012-05-10 03:25:52 +0000 | [diff] [blame] | 72 | #include <net/af_ieee802154.h> |
YOSHIFUJI Hideaki / 吉藤英明 | cb6bf35 | 2013-03-25 08:26:24 +0000 | [diff] [blame] | 73 | #include <net/firewire.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | #include <net/ipv6.h> |
| 75 | #include <net/protocol.h> |
| 76 | #include <net/ndisc.h> |
| 77 | #include <net/ip6_route.h> |
| 78 | #include <net/addrconf.h> |
| 79 | #include <net/tcp.h> |
| 80 | #include <net/ip.h> |
Thomas Graf | 5d62026 | 2006-08-15 00:35:02 -0700 | [diff] [blame] | 81 | #include <net/netlink.h> |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 82 | #include <net/pkt_sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | #include <linux/if_tunnel.h> |
| 84 | #include <linux/rtnetlink.h> |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 85 | #include <linux/netconf.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | |
| 87 | #ifdef CONFIG_IPV6_PRIVACY |
| 88 | #include <linux/random.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | #endif |
| 90 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 91 | #include <linux/uaccess.h> |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 92 | #include <asm/unaligned.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
| 94 | #include <linux/proc_fs.h> |
| 95 | #include <linux/seq_file.h> |
Paul Gortmaker | bc3b2d7 | 2011-07-15 11:47:34 -0400 | [diff] [blame] | 96 | #include <linux/export.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | |
| 98 | /* Set to 3 to get tracing... */ |
| 99 | #define ACONF_DEBUG 2 |
| 100 | |
| 101 | #if ACONF_DEBUG >= 3 |
| 102 | #define ADBG(x) printk x |
| 103 | #else |
| 104 | #define ADBG(x) |
| 105 | #endif |
| 106 | |
| 107 | #define INFINITY_LIFE_TIME 0xFFFFFFFF |
Thomas Graf | 18a31e1 | 2010-11-17 04:12:02 +0000 | [diff] [blame] | 108 | |
| 109 | static inline u32 cstamp_delta(unsigned long cstamp) |
| 110 | { |
| 111 | return (cstamp - INITIAL_JIFFIES) * 100UL / HZ; |
| 112 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | |
| 114 | #ifdef CONFIG_SYSCTL |
Pavel Emelyanov | f52295a | 2007-12-02 00:58:37 +1100 | [diff] [blame] | 115 | static void addrconf_sysctl_register(struct inet6_dev *idev); |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 116 | static void addrconf_sysctl_unregister(struct inet6_dev *idev); |
| 117 | #else |
| 118 | static inline void addrconf_sysctl_register(struct inet6_dev *idev) |
| 119 | { |
| 120 | } |
| 121 | |
| 122 | static inline void addrconf_sysctl_unregister(struct inet6_dev *idev) |
| 123 | { |
| 124 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | #endif |
| 126 | |
| 127 | #ifdef CONFIG_IPV6_PRIVACY |
Sorin Dumitru | eb7e057 | 2012-08-30 02:01:45 +0000 | [diff] [blame] | 128 | static void __ipv6_regen_rndid(struct inet6_dev *idev); |
| 129 | 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] | 130 | static void ipv6_regen_rndid(unsigned long data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | #endif |
| 132 | |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 133 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | static int ipv6_count_addresses(struct inet6_dev *idev); |
| 135 | |
| 136 | /* |
| 137 | * Configured unicast address hash table |
| 138 | */ |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 139 | static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE]; |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 140 | static DEFINE_SPINLOCK(addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | static void addrconf_verify(unsigned long); |
| 143 | |
Ingo Molnar | 8d06afa | 2005-09-09 13:10:40 -0700 | [diff] [blame] | 144 | static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | static DEFINE_SPINLOCK(addrconf_verify_lock); |
| 146 | |
| 147 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); |
| 148 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); |
| 149 | |
Jiri Pirko | 93d9b7d | 2010-03-10 10:28:56 +0000 | [diff] [blame] | 150 | static void addrconf_type_change(struct net_device *dev, |
| 151 | unsigned long event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | static int addrconf_ifdown(struct net_device *dev, int how); |
| 153 | |
Romain Kuntz | 21caa66 | 2013-01-09 21:06:03 +0000 | [diff] [blame] | 154 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, |
| 155 | int plen, |
| 156 | const struct net_device *dev, |
| 157 | u32 flags, u32 noflags); |
| 158 | |
David S. Miller | cf22f9a | 2012-04-14 21:37:40 -0400 | [diff] [blame] | 159 | static void addrconf_dad_start(struct inet6_ifaddr *ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | static void addrconf_dad_timer(unsigned long data); |
| 161 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 162 | static void addrconf_dad_run(struct inet6_dev *idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | static void addrconf_rs_timer(unsigned long data); |
| 164 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); |
| 165 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); |
| 166 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 167 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | struct prefix_info *pinfo); |
David S. Miller | 3e81c6d | 2010-03-20 16:18:00 -0700 | [diff] [blame] | 169 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
| 170 | struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | |
Adrian Bunk | 888c848 | 2008-07-22 14:21:58 -0700 | [diff] [blame] | 172 | static struct ipv6_devconf ipv6_devconf __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | .forwarding = 0, |
| 174 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, |
| 175 | .mtu6 = IPV6_MIN_MTU, |
| 176 | .accept_ra = 1, |
| 177 | .accept_redirects = 1, |
| 178 | .autoconf = 1, |
| 179 | .force_mld_version = 0, |
| 180 | .dad_transmits = 1, |
| 181 | .rtr_solicits = MAX_RTR_SOLICITATIONS, |
| 182 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, |
| 183 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, |
| 184 | #ifdef CONFIG_IPV6_PRIVACY |
| 185 | .use_tempaddr = 0, |
| 186 | .temp_valid_lft = TEMP_VALID_LIFETIME, |
| 187 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, |
| 188 | .regen_max_retry = REGEN_MAX_RETRY, |
| 189 | .max_desync_factor = MAX_DESYNC_FACTOR, |
| 190 | #endif |
| 191 | .max_addresses = IPV6_MAX_ADDRESSES, |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 192 | .accept_ra_defrtr = 1, |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 193 | .accept_ra_pinfo = 1, |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 194 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 195 | .accept_ra_rtr_pref = 1, |
YOSHIFUJI Hideaki | 52e1635 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 196 | .rtr_probe_interval = 60 * HZ, |
YOSHIFUJI Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 197 | #ifdef CONFIG_IPV6_ROUTE_INFO |
| 198 | .accept_ra_rt_info_max_plen = 0, |
| 199 | #endif |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 200 | #endif |
YOSHIFUJI Hideaki | fbea49e | 2006-09-22 14:43:49 -0700 | [diff] [blame] | 201 | .proxy_ndp = 0, |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 202 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
YOSHIFUJI Hideaki | 778d80b | 2008-06-28 14:17:11 +0900 | [diff] [blame] | 203 | .disable_ipv6 = 0, |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 204 | .accept_dad = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | }; |
| 206 | |
Brian Haley | ab32ea5 | 2006-09-22 14:15:41 -0700 | [diff] [blame] | 207 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | .forwarding = 0, |
| 209 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, |
| 210 | .mtu6 = IPV6_MIN_MTU, |
| 211 | .accept_ra = 1, |
| 212 | .accept_redirects = 1, |
| 213 | .autoconf = 1, |
| 214 | .dad_transmits = 1, |
| 215 | .rtr_solicits = MAX_RTR_SOLICITATIONS, |
| 216 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, |
| 217 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, |
| 218 | #ifdef CONFIG_IPV6_PRIVACY |
| 219 | .use_tempaddr = 0, |
| 220 | .temp_valid_lft = TEMP_VALID_LIFETIME, |
| 221 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, |
| 222 | .regen_max_retry = REGEN_MAX_RETRY, |
| 223 | .max_desync_factor = MAX_DESYNC_FACTOR, |
| 224 | #endif |
| 225 | .max_addresses = IPV6_MAX_ADDRESSES, |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 226 | .accept_ra_defrtr = 1, |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 227 | .accept_ra_pinfo = 1, |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 228 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 229 | .accept_ra_rtr_pref = 1, |
YOSHIFUJI Hideaki | 52e1635 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 230 | .rtr_probe_interval = 60 * HZ, |
YOSHIFUJI Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 231 | #ifdef CONFIG_IPV6_ROUTE_INFO |
| 232 | .accept_ra_rt_info_max_plen = 0, |
| 233 | #endif |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 234 | #endif |
YOSHIFUJI Hideaki | fbea49e | 2006-09-22 14:43:49 -0700 | [diff] [blame] | 235 | .proxy_ndp = 0, |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 236 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
YOSHIFUJI Hideaki | 778d80b | 2008-06-28 14:17:11 +0900 | [diff] [blame] | 237 | .disable_ipv6 = 0, |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 238 | .accept_dad = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | }; |
| 240 | |
| 241 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 244 | const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT; |
| 245 | const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; |
Hannes Frederic Sowa | 2c5e893 | 2013-02-10 03:50:18 +0000 | [diff] [blame] | 246 | const struct in6_addr in6addr_interfacelocal_allnodes = IN6ADDR_INTERFACELOCAL_ALLNODES_INIT; |
| 247 | const struct in6_addr in6addr_interfacelocal_allrouters = IN6ADDR_INTERFACELOCAL_ALLROUTERS_INIT; |
| 248 | const struct in6_addr in6addr_sitelocal_allrouters = IN6ADDR_SITELOCAL_ALLROUTERS_INIT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 250 | /* Check if a valid qdisc is available */ |
David S. Miller | 0529794 | 2008-07-08 23:01:27 -0700 | [diff] [blame] | 251 | static inline bool addrconf_qdisc_ok(const struct net_device *dev) |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 252 | { |
David S. Miller | 0529794 | 2008-07-08 23:01:27 -0700 | [diff] [blame] | 253 | return !qdisc_tx_is_noop(dev); |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 254 | } |
| 255 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 256 | static void addrconf_del_rs_timer(struct inet6_dev *idev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | { |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 258 | if (del_timer(&idev->rs_timer)) |
| 259 | __in6_dev_put(idev); |
| 260 | } |
| 261 | |
| 262 | static void addrconf_del_dad_timer(struct inet6_ifaddr *ifp) |
| 263 | { |
| 264 | if (del_timer(&ifp->dad_timer)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | __in6_ifa_put(ifp); |
| 266 | } |
| 267 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 268 | static void addrconf_mod_rs_timer(struct inet6_dev *idev, |
| 269 | unsigned long when) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | { |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 271 | if (!timer_pending(&idev->rs_timer)) |
| 272 | in6_dev_hold(idev); |
| 273 | mod_timer(&idev->rs_timer, jiffies + when); |
| 274 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 276 | static void addrconf_mod_dad_timer(struct inet6_ifaddr *ifp, |
| 277 | unsigned long when) |
| 278 | { |
| 279 | if (!timer_pending(&ifp->dad_timer)) |
| 280 | in6_ifa_hold(ifp); |
| 281 | mod_timer(&ifp->dad_timer, jiffies + when); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | } |
| 283 | |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 284 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
| 285 | { |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 286 | if (snmp_mib_init((void __percpu **)idev->stats.ipv6, |
Eric Dumazet | 1823e4c8 | 2010-06-22 20:58:41 +0000 | [diff] [blame] | 287 | sizeof(struct ipstats_mib), |
| 288 | __alignof__(struct ipstats_mib)) < 0) |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 289 | goto err_ip; |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 290 | idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device), |
| 291 | GFP_KERNEL); |
| 292 | if (!idev->stats.icmpv6dev) |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 293 | goto err_icmp; |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 294 | idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device), |
| 295 | GFP_KERNEL); |
| 296 | if (!idev->stats.icmpv6msgdev) |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 297 | goto err_icmpmsg; |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 298 | |
| 299 | return 0; |
| 300 | |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 301 | err_icmpmsg: |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 302 | kfree(idev->stats.icmpv6dev); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 303 | err_icmp: |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 304 | snmp_mib_free((void __percpu **)idev->stats.ipv6); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 305 | err_ip: |
Pavel Emelyanov | aaf70ec | 2007-10-17 21:25:32 -0700 | [diff] [blame] | 306 | return -ENOMEM; |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 307 | } |
| 308 | |
Pavel Emelyanov | 16910b9 | 2007-10-17 21:23:43 -0700 | [diff] [blame] | 309 | static void snmp6_free_dev(struct inet6_dev *idev) |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 310 | { |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 311 | kfree(idev->stats.icmpv6msgdev); |
| 312 | kfree(idev->stats.icmpv6dev); |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 313 | snmp_mib_free((void __percpu **)idev->stats.ipv6); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 314 | } |
| 315 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | /* Nobody refers to this device, we may destroy it. */ |
| 317 | |
| 318 | void in6_dev_finish_destroy(struct inet6_dev *idev) |
| 319 | { |
| 320 | struct net_device *dev = idev->dev; |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 321 | |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 322 | WARN_ON(!list_empty(&idev->addr_list)); |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 323 | WARN_ON(idev->mc_list != NULL); |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 324 | WARN_ON(timer_pending(&idev->rs_timer)); |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 325 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | #ifdef NET_REFCNT_DEBUG |
Joe Perches | 91df42b | 2012-05-15 14:11:54 +0000 | [diff] [blame] | 327 | pr_debug("%s: %s\n", __func__, dev ? dev->name : "NIL"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | #endif |
| 329 | dev_put(dev); |
| 330 | if (!idev->dead) { |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 331 | pr_warn("Freeing alive inet6 device %p\n", idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | return; |
| 333 | } |
| 334 | snmp6_free_dev(idev); |
Lai Jiangshan | 38f57d1 | 2011-03-15 17:59:14 +0800 | [diff] [blame] | 335 | kfree_rcu(idev, rcu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | } |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 337 | EXPORT_SYMBOL(in6_dev_finish_destroy); |
| 338 | |
Eldad Zack | 8e5e8f3 | 2012-04-01 07:49:08 +0000 | [diff] [blame] | 339 | static struct inet6_dev *ipv6_add_dev(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | { |
| 341 | struct inet6_dev *ndev; |
| 342 | |
| 343 | ASSERT_RTNL(); |
| 344 | |
| 345 | if (dev->mtu < IPV6_MIN_MTU) |
| 346 | return NULL; |
| 347 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 348 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 350 | if (ndev == NULL) |
| 351 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 353 | rwlock_init(&ndev->lock); |
| 354 | ndev->dev = dev; |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 355 | INIT_LIST_HEAD(&ndev->addr_list); |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 356 | setup_timer(&ndev->rs_timer, addrconf_rs_timer, |
| 357 | (unsigned long)ndev); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 358 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 359 | ndev->cnf.mtu6 = dev->mtu; |
| 360 | ndev->cnf.sysctl = NULL; |
| 361 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); |
| 362 | if (ndev->nd_parms == NULL) { |
| 363 | kfree(ndev); |
| 364 | return NULL; |
| 365 | } |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 366 | if (ndev->cnf.forwarding) |
| 367 | dev_disable_lro(dev); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 368 | /* We refer to the device */ |
| 369 | dev_hold(dev); |
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 | if (snmp6_alloc_dev(ndev) < 0) { |
| 372 | ADBG((KERN_WARNING |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 373 | "%s: cannot allocate memory for statistics; dev=%s.\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 374 | __func__, dev->name)); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 375 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
Roy Li | 8603e33 | 2011-09-20 15:10:16 -0400 | [diff] [blame] | 376 | dev_put(dev); |
| 377 | kfree(ndev); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 378 | return NULL; |
| 379 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 381 | if (snmp6_register_dev(ndev) < 0) { |
| 382 | ADBG((KERN_WARNING |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 383 | "%s: cannot create /proc/net/dev_snmp6/%s\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 384 | __func__, dev->name)); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 385 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
| 386 | ndev->dead = 1; |
| 387 | in6_dev_finish_destroy(ndev); |
| 388 | return NULL; |
| 389 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 391 | /* One reference from device. We must do this before |
| 392 | * we invoke __ipv6_regen_rndid(). |
| 393 | */ |
| 394 | in6_dev_hold(ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 396 | if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) |
| 397 | ndev->cnf.accept_dad = -1; |
| 398 | |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 399 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
YOSHIFUJI Hideaki | b077d7a | 2008-04-13 23:42:18 -0700 | [diff] [blame] | 400 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 401 | pr_info("%s: Disabled Multicast RS\n", dev->name); |
YOSHIFUJI Hideaki | b077d7a | 2008-04-13 23:42:18 -0700 | [diff] [blame] | 402 | ndev->cnf.rtr_solicits = 0; |
| 403 | } |
| 404 | #endif |
| 405 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | #ifdef CONFIG_IPV6_PRIVACY |
stephen hemminger | 372e6c8 | 2010-03-17 20:31:09 +0000 | [diff] [blame] | 407 | INIT_LIST_HEAD(&ndev->tempaddr_list); |
Pavel Emelyanov | b24b8a2 | 2008-01-23 21:20:07 -0800 | [diff] [blame] | 408 | setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 409 | if ((dev->flags&IFF_LOOPBACK) || |
| 410 | dev->type == ARPHRD_TUNNEL || |
YOSHIFUJI Hideaki | 9625ed7 | 2008-04-13 23:47:11 -0700 | [diff] [blame] | 411 | dev->type == ARPHRD_TUNNEL6 || |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 412 | dev->type == ARPHRD_SIT || |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 413 | dev->type == ARPHRD_NONE) { |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 414 | ndev->cnf.use_tempaddr = -1; |
| 415 | } else { |
| 416 | in6_dev_hold(ndev); |
| 417 | ipv6_regen_rndid((unsigned long) ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | } |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 419 | #endif |
Daniel Borkmann | 914faa1 | 2013-04-09 03:47:14 +0000 | [diff] [blame] | 420 | ndev->token = in6addr_any; |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 421 | |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 422 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
Herbert Xu | 53aadcc | 2007-03-27 14:31:52 -0700 | [diff] [blame] | 423 | ndev->if_flags |= IF_READY; |
| 424 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 425 | ipv6_mc_init_dev(ndev); |
| 426 | ndev->tstamp = jiffies; |
Pavel Emelyanov | f52295a | 2007-12-02 00:58:37 +1100 | [diff] [blame] | 427 | addrconf_sysctl_register(ndev); |
David L Stevens | 30c4cf5 | 2007-01-04 12:31:14 -0800 | [diff] [blame] | 428 | /* protected by rtnl_lock */ |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 429 | rcu_assign_pointer(dev->ip6_ptr, ndev); |
YOSHIFUJI Hideaki | d88ae4c | 2007-01-14 21:48:40 -0800 | [diff] [blame] | 430 | |
Hannes Frederic Sowa | 2c5e893 | 2013-02-10 03:50:18 +0000 | [diff] [blame] | 431 | /* Join interface-local all-node multicast group */ |
| 432 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allnodes); |
| 433 | |
YOSHIFUJI Hideaki | d88ae4c | 2007-01-14 21:48:40 -0800 | [diff] [blame] | 434 | /* Join all-node multicast group */ |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 435 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
YOSHIFUJI Hideaki | d88ae4c | 2007-01-14 21:48:40 -0800 | [diff] [blame] | 436 | |
Li Wei | d6ddef9 | 2012-03-05 14:45:17 +0000 | [diff] [blame] | 437 | /* Join all-router multicast group if forwarding is set */ |
Li Wei | 8b2aaed | 2012-03-07 14:58:07 +0000 | [diff] [blame] | 438 | if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST)) |
Li Wei | d6ddef9 | 2012-03-05 14:45:17 +0000 | [diff] [blame] | 439 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
| 440 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | return ndev; |
| 442 | } |
| 443 | |
Eldad Zack | 8e5e8f3 | 2012-04-01 07:49:08 +0000 | [diff] [blame] | 444 | static struct inet6_dev *ipv6_find_idev(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | { |
| 446 | struct inet6_dev *idev; |
| 447 | |
| 448 | ASSERT_RTNL(); |
| 449 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 450 | idev = __in6_dev_get(dev); |
| 451 | if (!idev) { |
| 452 | idev = ipv6_add_dev(dev); |
| 453 | if (!idev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | return NULL; |
| 455 | } |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 456 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | if (dev->flags&IFF_UP) |
| 458 | ipv6_mc_up(idev); |
| 459 | return idev; |
| 460 | } |
| 461 | |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 462 | static int inet6_netconf_msgsize_devconf(int type) |
| 463 | { |
| 464 | int size = NLMSG_ALIGN(sizeof(struct netconfmsg)) |
| 465 | + nla_total_size(4); /* NETCONFA_IFINDEX */ |
| 466 | |
Nicolas Dichtel | 76f8f6c | 2012-10-25 22:28:51 +0000 | [diff] [blame] | 467 | /* type -1 is used for ALL */ |
| 468 | if (type == -1 || type == NETCONFA_FORWARDING) |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 469 | size += nla_total_size(4); |
David S. Miller | b1afce9 | 2012-12-04 14:46:34 -0500 | [diff] [blame] | 470 | #ifdef CONFIG_IPV6_MROUTE |
Nicolas Dichtel | d67b8c6 | 2012-12-04 01:13:35 +0000 | [diff] [blame] | 471 | if (type == -1 || type == NETCONFA_MC_FORWARDING) |
| 472 | size += nla_total_size(4); |
David S. Miller | b1afce9 | 2012-12-04 14:46:34 -0500 | [diff] [blame] | 473 | #endif |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 474 | |
| 475 | return size; |
| 476 | } |
| 477 | |
| 478 | static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex, |
| 479 | struct ipv6_devconf *devconf, u32 portid, |
| 480 | u32 seq, int event, unsigned int flags, |
| 481 | int type) |
| 482 | { |
| 483 | struct nlmsghdr *nlh; |
| 484 | struct netconfmsg *ncm; |
| 485 | |
| 486 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg), |
| 487 | flags); |
| 488 | if (nlh == NULL) |
| 489 | return -EMSGSIZE; |
| 490 | |
| 491 | ncm = nlmsg_data(nlh); |
| 492 | ncm->ncm_family = AF_INET6; |
| 493 | |
| 494 | if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0) |
| 495 | goto nla_put_failure; |
| 496 | |
Nicolas Dichtel | 76f8f6c | 2012-10-25 22:28:51 +0000 | [diff] [blame] | 497 | /* type -1 is used for ALL */ |
| 498 | if ((type == -1 || type == NETCONFA_FORWARDING) && |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 499 | nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0) |
| 500 | goto nla_put_failure; |
David S. Miller | b1afce9 | 2012-12-04 14:46:34 -0500 | [diff] [blame] | 501 | #ifdef CONFIG_IPV6_MROUTE |
Nicolas Dichtel | d67b8c6 | 2012-12-04 01:13:35 +0000 | [diff] [blame] | 502 | if ((type == -1 || type == NETCONFA_MC_FORWARDING) && |
| 503 | nla_put_s32(skb, NETCONFA_MC_FORWARDING, |
| 504 | devconf->mc_forwarding) < 0) |
| 505 | goto nla_put_failure; |
David S. Miller | b1afce9 | 2012-12-04 14:46:34 -0500 | [diff] [blame] | 506 | #endif |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 507 | return nlmsg_end(skb, nlh); |
| 508 | |
| 509 | nla_put_failure: |
| 510 | nlmsg_cancel(skb, nlh); |
| 511 | return -EMSGSIZE; |
| 512 | } |
| 513 | |
Nicolas Dichtel | d67b8c6 | 2012-12-04 01:13:35 +0000 | [diff] [blame] | 514 | void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex, |
| 515 | struct ipv6_devconf *devconf) |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 516 | { |
| 517 | struct sk_buff *skb; |
| 518 | int err = -ENOBUFS; |
| 519 | |
| 520 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(type), GFP_ATOMIC); |
| 521 | if (skb == NULL) |
| 522 | goto errout; |
| 523 | |
| 524 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, 0, 0, |
| 525 | RTM_NEWNETCONF, 0, type); |
| 526 | if (err < 0) { |
| 527 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ |
| 528 | WARN_ON(err == -EMSGSIZE); |
| 529 | kfree_skb(skb); |
| 530 | goto errout; |
| 531 | } |
| 532 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_NETCONF, NULL, GFP_ATOMIC); |
| 533 | return; |
| 534 | errout: |
Cong Ding | bd77902 | 2012-12-18 12:08:56 +0000 | [diff] [blame] | 535 | rtnl_set_sk_err(net, RTNLGRP_IPV6_NETCONF, err); |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 536 | } |
| 537 | |
Nicolas Dichtel | 76f8f6c | 2012-10-25 22:28:51 +0000 | [diff] [blame] | 538 | static const struct nla_policy devconf_ipv6_policy[NETCONFA_MAX+1] = { |
| 539 | [NETCONFA_IFINDEX] = { .len = sizeof(int) }, |
| 540 | [NETCONFA_FORWARDING] = { .len = sizeof(int) }, |
| 541 | }; |
| 542 | |
| 543 | static int inet6_netconf_get_devconf(struct sk_buff *in_skb, |
Thomas Graf | 661d296 | 2013-03-21 07:45:29 +0000 | [diff] [blame] | 544 | struct nlmsghdr *nlh) |
Nicolas Dichtel | 76f8f6c | 2012-10-25 22:28:51 +0000 | [diff] [blame] | 545 | { |
| 546 | struct net *net = sock_net(in_skb->sk); |
| 547 | struct nlattr *tb[NETCONFA_MAX+1]; |
| 548 | struct netconfmsg *ncm; |
| 549 | struct sk_buff *skb; |
| 550 | struct ipv6_devconf *devconf; |
| 551 | struct inet6_dev *in6_dev; |
| 552 | struct net_device *dev; |
| 553 | int ifindex; |
| 554 | int err; |
| 555 | |
| 556 | err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX, |
| 557 | devconf_ipv6_policy); |
| 558 | if (err < 0) |
| 559 | goto errout; |
| 560 | |
| 561 | err = EINVAL; |
| 562 | if (!tb[NETCONFA_IFINDEX]) |
| 563 | goto errout; |
| 564 | |
| 565 | ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]); |
| 566 | switch (ifindex) { |
| 567 | case NETCONFA_IFINDEX_ALL: |
| 568 | devconf = net->ipv6.devconf_all; |
| 569 | break; |
| 570 | case NETCONFA_IFINDEX_DEFAULT: |
| 571 | devconf = net->ipv6.devconf_dflt; |
| 572 | break; |
| 573 | default: |
| 574 | dev = __dev_get_by_index(net, ifindex); |
| 575 | if (dev == NULL) |
| 576 | goto errout; |
| 577 | in6_dev = __in6_dev_get(dev); |
| 578 | if (in6_dev == NULL) |
| 579 | goto errout; |
| 580 | devconf = &in6_dev->cnf; |
| 581 | break; |
| 582 | } |
| 583 | |
| 584 | err = -ENOBUFS; |
| 585 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(-1), GFP_ATOMIC); |
| 586 | if (skb == NULL) |
| 587 | goto errout; |
| 588 | |
| 589 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, |
| 590 | NETLINK_CB(in_skb).portid, |
| 591 | nlh->nlmsg_seq, RTM_NEWNETCONF, 0, |
| 592 | -1); |
| 593 | if (err < 0) { |
| 594 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ |
| 595 | WARN_ON(err == -EMSGSIZE); |
| 596 | kfree_skb(skb); |
| 597 | goto errout; |
| 598 | } |
| 599 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); |
| 600 | errout: |
| 601 | return err; |
| 602 | } |
| 603 | |
Nicolas Dichtel | 7a67420 | 2013-03-05 23:42:06 +0000 | [diff] [blame] | 604 | static int inet6_netconf_dump_devconf(struct sk_buff *skb, |
| 605 | struct netlink_callback *cb) |
| 606 | { |
| 607 | struct net *net = sock_net(skb->sk); |
| 608 | int h, s_h; |
| 609 | int idx, s_idx; |
| 610 | struct net_device *dev; |
| 611 | struct inet6_dev *idev; |
| 612 | struct hlist_head *head; |
| 613 | |
| 614 | s_h = cb->args[0]; |
| 615 | s_idx = idx = cb->args[1]; |
| 616 | |
| 617 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
| 618 | idx = 0; |
| 619 | head = &net->dev_index_head[h]; |
| 620 | rcu_read_lock(); |
Nicolas Dichtel | 63998ac | 2013-03-22 06:28:43 +0000 | [diff] [blame] | 621 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ |
| 622 | net->dev_base_seq; |
Nicolas Dichtel | 7a67420 | 2013-03-05 23:42:06 +0000 | [diff] [blame] | 623 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
| 624 | if (idx < s_idx) |
| 625 | goto cont; |
| 626 | idev = __in6_dev_get(dev); |
| 627 | if (!idev) |
| 628 | goto cont; |
| 629 | |
| 630 | if (inet6_netconf_fill_devconf(skb, dev->ifindex, |
| 631 | &idev->cnf, |
| 632 | NETLINK_CB(cb->skb).portid, |
| 633 | cb->nlh->nlmsg_seq, |
| 634 | RTM_NEWNETCONF, |
| 635 | NLM_F_MULTI, |
| 636 | -1) <= 0) { |
| 637 | rcu_read_unlock(); |
| 638 | goto done; |
| 639 | } |
Nicolas Dichtel | 63998ac | 2013-03-22 06:28:43 +0000 | [diff] [blame] | 640 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
Nicolas Dichtel | 7a67420 | 2013-03-05 23:42:06 +0000 | [diff] [blame] | 641 | cont: |
| 642 | idx++; |
| 643 | } |
| 644 | rcu_read_unlock(); |
| 645 | } |
| 646 | if (h == NETDEV_HASHENTRIES) { |
| 647 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL, |
| 648 | net->ipv6.devconf_all, |
| 649 | NETLINK_CB(cb->skb).portid, |
| 650 | cb->nlh->nlmsg_seq, |
| 651 | RTM_NEWNETCONF, NLM_F_MULTI, |
| 652 | -1) <= 0) |
| 653 | goto done; |
| 654 | else |
| 655 | h++; |
| 656 | } |
| 657 | if (h == NETDEV_HASHENTRIES + 1) { |
| 658 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT, |
| 659 | net->ipv6.devconf_dflt, |
| 660 | NETLINK_CB(cb->skb).portid, |
| 661 | cb->nlh->nlmsg_seq, |
| 662 | RTM_NEWNETCONF, NLM_F_MULTI, |
| 663 | -1) <= 0) |
| 664 | goto done; |
| 665 | else |
| 666 | h++; |
| 667 | } |
| 668 | done: |
| 669 | cb->args[0] = h; |
| 670 | cb->args[1] = idx; |
| 671 | |
| 672 | return skb->len; |
| 673 | } |
| 674 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | #ifdef CONFIG_SYSCTL |
| 676 | static void dev_forward_change(struct inet6_dev *idev) |
| 677 | { |
| 678 | struct net_device *dev; |
| 679 | struct inet6_ifaddr *ifa; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | |
| 681 | if (!idev) |
| 682 | return; |
| 683 | dev = idev->dev; |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 684 | if (idev->cnf.forwarding) |
| 685 | dev_disable_lro(dev); |
Amerigo Wang | 1a94083 | 2012-10-28 17:43:53 +0000 | [diff] [blame] | 686 | if (dev->flags & IFF_MULTICAST) { |
Hannes Frederic Sowa | 2c5e893 | 2013-02-10 03:50:18 +0000 | [diff] [blame] | 687 | if (idev->cnf.forwarding) { |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 688 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
Hannes Frederic Sowa | 2c5e893 | 2013-02-10 03:50:18 +0000 | [diff] [blame] | 689 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allrouters); |
| 690 | ipv6_dev_mc_inc(dev, &in6addr_sitelocal_allrouters); |
| 691 | } else { |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 692 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
Hannes Frederic Sowa | 2c5e893 | 2013-02-10 03:50:18 +0000 | [diff] [blame] | 693 | ipv6_dev_mc_dec(dev, &in6addr_interfacelocal_allrouters); |
| 694 | ipv6_dev_mc_dec(dev, &in6addr_sitelocal_allrouters); |
| 695 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | } |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 697 | |
| 698 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
Michal Wrobel | 2c12a74 | 2007-02-26 15:36:10 -0800 | [diff] [blame] | 699 | if (ifa->flags&IFA_F_TENTATIVE) |
| 700 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | if (idev->cnf.forwarding) |
| 702 | addrconf_join_anycast(ifa); |
| 703 | else |
| 704 | addrconf_leave_anycast(ifa); |
| 705 | } |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 706 | inet6_netconf_notify_devconf(dev_net(dev), NETCONFA_FORWARDING, |
| 707 | dev->ifindex, &idev->cnf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | } |
| 709 | |
| 710 | |
Pavel Emelyanov | e186932 | 2008-01-10 17:43:50 -0800 | [diff] [blame] | 711 | static void addrconf_forward_change(struct net *net, __s32 newf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | { |
| 713 | struct net_device *dev; |
| 714 | struct inet6_dev *idev; |
| 715 | |
Ben Hutchings | 4acd494 | 2012-08-14 08:54:51 +0000 | [diff] [blame] | 716 | for_each_netdev(net, dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | idev = __in6_dev_get(dev); |
| 718 | if (idev) { |
Pavel Emelyanov | e186932 | 2008-01-10 17:43:50 -0800 | [diff] [blame] | 719 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
| 720 | idev->cnf.forwarding = newf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | if (changed) |
| 722 | dev_forward_change(idev); |
| 723 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | } |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 726 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 727 | 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] | 728 | { |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 729 | struct net *net; |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 730 | int old; |
| 731 | |
| 732 | if (!rtnl_trylock()) |
| 733 | return restart_syscall(); |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 734 | |
| 735 | net = (struct net *)table->extra2; |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 736 | old = *p; |
| 737 | *p = newf; |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 738 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 739 | if (p == &net->ipv6.devconf_dflt->forwarding) { |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 740 | if ((!newf) ^ (!old)) |
| 741 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, |
| 742 | NETCONFA_IFINDEX_DEFAULT, |
| 743 | net->ipv6.devconf_dflt); |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 744 | rtnl_unlock(); |
| 745 | return 0; |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 746 | } |
Stephen Hemminger | b325fdd | 2009-02-26 06:55:31 +0000 | [diff] [blame] | 747 | |
Pavel Emelyanov | e186932 | 2008-01-10 17:43:50 -0800 | [diff] [blame] | 748 | if (p == &net->ipv6.devconf_all->forwarding) { |
Pavel Emelyanov | e186932 | 2008-01-10 17:43:50 -0800 | [diff] [blame] | 749 | net->ipv6.devconf_dflt->forwarding = newf; |
| 750 | addrconf_forward_change(net, newf); |
Nicolas Dichtel | f3a1bfb | 2012-10-25 22:28:50 +0000 | [diff] [blame] | 751 | if ((!newf) ^ (!old)) |
| 752 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, |
| 753 | NETCONFA_IFINDEX_ALL, |
| 754 | net->ipv6.devconf_all); |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 755 | } else if ((!newf) ^ (!old)) |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 756 | dev_forward_change((struct inet6_dev *)table->extra1); |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 757 | rtnl_unlock(); |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 758 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 759 | if (newf) |
Daniel Lezcano | 7b4da53 | 2008-03-04 13:47:14 -0800 | [diff] [blame] | 760 | rt6_purge_dflt_routers(net); |
Stephen Hemminger | b325fdd | 2009-02-26 06:55:31 +0000 | [diff] [blame] | 761 | return 1; |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 762 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | #endif |
| 764 | |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 765 | /* Nobody refers to this ifaddr, destroy it */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) |
| 767 | { |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 768 | WARN_ON(!hlist_unhashed(&ifp->addr_lst)); |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 769 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | #ifdef NET_REFCNT_DEBUG |
Joe Perches | 91df42b | 2012-05-15 14:11:54 +0000 | [diff] [blame] | 771 | pr_debug("%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | #endif |
| 773 | |
| 774 | in6_dev_put(ifp->idev); |
| 775 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 776 | if (del_timer(&ifp->dad_timer)) |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 777 | pr_notice("Timer is still running, when freeing ifa=%p\n", ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | |
Herbert Xu | e9d3e08 | 2010-05-18 15:36:06 -0700 | [diff] [blame] | 779 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 780 | pr_warn("Freeing alive inet6 address %p\n", ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | return; |
| 782 | } |
Amerigo Wang | 94e187c | 2012-10-29 00:13:19 +0000 | [diff] [blame] | 783 | ip6_rt_put(ifp->rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | |
Lai Jiangshan | e578598 | 2011-03-15 18:00:14 +0800 | [diff] [blame] | 785 | kfree_rcu(ifp, rcu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | } |
| 787 | |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 788 | static void |
| 789 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) |
| 790 | { |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 791 | struct list_head *p; |
YOSHIFUJI Hideaki | 8a6ce0c | 2006-07-11 13:05:30 -0700 | [diff] [blame] | 792 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 793 | |
| 794 | /* |
| 795 | * Each device address list is sorted in order of scope - |
| 796 | * global before linklocal. |
| 797 | */ |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 798 | list_for_each(p, &idev->addr_list) { |
| 799 | struct inet6_ifaddr *ifa |
| 800 | = list_entry(p, struct inet6_ifaddr, if_list); |
YOSHIFUJI Hideaki | 8a6ce0c | 2006-07-11 13:05:30 -0700 | [diff] [blame] | 801 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 802 | break; |
| 803 | } |
| 804 | |
David S. Miller | b54c9b9 | 2010-03-25 21:25:30 -0700 | [diff] [blame] | 805 | list_add_tail(&ifp->if_list, p); |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 806 | } |
| 807 | |
Eric Dumazet | ddbe503 | 2012-07-18 08:11:12 +0000 | [diff] [blame] | 808 | static u32 inet6_addr_hash(const struct in6_addr *addr) |
YOSHIFUJI Hideaki | 3eb84f4 | 2008-04-10 15:42:08 +0900 | [diff] [blame] | 809 | { |
Eric Dumazet | ddbe503 | 2012-07-18 08:11:12 +0000 | [diff] [blame] | 810 | return hash_32(ipv6_addr_hash(addr), IN6_ADDR_HSIZE_SHIFT); |
YOSHIFUJI Hideaki | 3eb84f4 | 2008-04-10 15:42:08 +0900 | [diff] [blame] | 811 | } |
| 812 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | /* On success it returns ifp with increased reference count */ |
| 814 | |
| 815 | static struct inet6_ifaddr * |
Jiri Pirko | 3f8f529 | 2013-08-01 10:41:27 +0200 | [diff] [blame] | 816 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
| 817 | const struct in6_addr *peer_addr, int pfxlen, |
Jiri Benc | 8a226b2 | 2013-08-01 10:41:28 +0200 | [diff] [blame] | 818 | int scope, u32 flags, u32 valid_lft, u32 prefered_lft) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | { |
| 820 | struct inet6_ifaddr *ifa = NULL; |
| 821 | struct rt6_info *rt; |
stephen hemminger | 3a88a81 | 2010-03-17 20:31:12 +0000 | [diff] [blame] | 822 | unsigned int hash; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | int err = 0; |
YOSHIFUJI Hideaki | d68b827 | 2008-06-25 16:26:47 +0900 | [diff] [blame] | 824 | int addr_type = ipv6_addr_type(addr); |
| 825 | |
| 826 | if (addr_type == IPV6_ADDR_ANY || |
| 827 | addr_type & IPV6_ADDR_MULTICAST || |
| 828 | (!(idev->dev->flags & IFF_LOOPBACK) && |
| 829 | addr_type & IPV6_ADDR_LOOPBACK)) |
| 830 | return ERR_PTR(-EADDRNOTAVAIL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 832 | rcu_read_lock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | if (idev->dead) { |
| 834 | err = -ENODEV; /*XXX*/ |
| 835 | goto out2; |
| 836 | } |
| 837 | |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 838 | if (idev->cnf.disable_ipv6) { |
Brian Haley | 9bdd8d4 | 2009-03-18 18:22:48 -0700 | [diff] [blame] | 839 | err = -EACCES; |
| 840 | goto out2; |
| 841 | } |
| 842 | |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 843 | spin_lock(&addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | |
| 845 | /* Ignore adding duplicate addresses on an interface */ |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 846 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | ADBG(("ipv6_add_addr: already assigned\n")); |
| 848 | err = -EEXIST; |
| 849 | goto out; |
| 850 | } |
| 851 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 852 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | |
| 854 | if (ifa == NULL) { |
| 855 | ADBG(("ipv6_add_addr: malloc failed\n")); |
| 856 | err = -ENOBUFS; |
| 857 | goto out; |
| 858 | } |
| 859 | |
David S. Miller | 8f03151 | 2011-12-06 16:48:14 -0500 | [diff] [blame] | 860 | rt = addrconf_dst_alloc(idev, addr, false); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | if (IS_ERR(rt)) { |
| 862 | err = PTR_ERR(rt); |
| 863 | goto out; |
| 864 | } |
| 865 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 866 | ifa->addr = *addr; |
Jiri Pirko | 3f8f529 | 2013-08-01 10:41:27 +0200 | [diff] [blame] | 867 | if (peer_addr) |
| 868 | ifa->peer_addr = *peer_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | |
| 870 | spin_lock_init(&ifa->lock); |
Herbert Xu | e9d3e08 | 2010-05-18 15:36:06 -0700 | [diff] [blame] | 871 | spin_lock_init(&ifa->state_lock); |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 872 | setup_timer(&ifa->dad_timer, addrconf_dad_timer, |
| 873 | (unsigned long)ifa); |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 874 | INIT_HLIST_NODE(&ifa->addr_lst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | ifa->scope = scope; |
| 876 | ifa->prefix_len = pfxlen; |
| 877 | ifa->flags = flags | IFA_F_TENTATIVE; |
Jiri Benc | 8a226b2 | 2013-08-01 10:41:28 +0200 | [diff] [blame] | 878 | ifa->valid_lft = valid_lft; |
| 879 | ifa->prefered_lft = prefered_lft; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | ifa->cstamp = ifa->tstamp = jiffies; |
Daniel Borkmann | 617fe29 | 2013-04-09 03:47:16 +0000 | [diff] [blame] | 881 | ifa->tokenized = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | |
Keir Fraser | 57f5f54 | 2006-08-29 02:43:49 -0700 | [diff] [blame] | 883 | ifa->rt = rt; |
| 884 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | ifa->idev = idev; |
| 886 | in6_dev_hold(idev); |
| 887 | /* For caller */ |
| 888 | in6_ifa_hold(ifa); |
| 889 | |
| 890 | /* Add to big hash table */ |
Eric Dumazet | ddbe503 | 2012-07-18 08:11:12 +0000 | [diff] [blame] | 891 | hash = inet6_addr_hash(addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 893 | hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]); |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 894 | spin_unlock(&addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | |
| 896 | write_lock(&idev->lock); |
| 897 | /* Add to inet6_dev unicast addr list. */ |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 898 | ipv6_link_dev_addr(idev, ifa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | |
| 900 | #ifdef CONFIG_IPV6_PRIVACY |
| 901 | if (ifa->flags&IFA_F_TEMPORARY) { |
stephen hemminger | 372e6c8 | 2010-03-17 20:31:09 +0000 | [diff] [blame] | 902 | list_add(&ifa->tmp_list, &idev->tempaddr_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | in6_ifa_hold(ifa); |
| 904 | } |
| 905 | #endif |
| 906 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | in6_ifa_hold(ifa); |
| 908 | write_unlock(&idev->lock); |
| 909 | out2: |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 910 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | |
YOSHIFUJI Hideaki | fd92833 | 2005-04-19 22:27:09 -0700 | [diff] [blame] | 912 | if (likely(err == 0)) |
Cong Wang | f88c91d | 2013-04-14 23:18:43 +0800 | [diff] [blame] | 913 | inet6addr_notifier_call_chain(NETDEV_UP, ifa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | else { |
| 915 | kfree(ifa); |
| 916 | ifa = ERR_PTR(err); |
| 917 | } |
| 918 | |
| 919 | return ifa; |
| 920 | out: |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 921 | spin_unlock(&addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | goto out2; |
| 923 | } |
| 924 | |
| 925 | /* This function wants to get referenced ifp and releases it before return */ |
| 926 | |
| 927 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) |
| 928 | { |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 929 | struct inet6_ifaddr *ifa, *ifn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | struct inet6_dev *idev = ifp->idev; |
Herbert Xu | 4c5ff6a | 2010-05-18 15:54:18 -0700 | [diff] [blame] | 931 | int state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | int deleted = 0, onlink = 0; |
| 933 | unsigned long expires = jiffies; |
| 934 | |
Herbert Xu | 4c5ff6a | 2010-05-18 15:54:18 -0700 | [diff] [blame] | 935 | spin_lock_bh(&ifp->state_lock); |
| 936 | state = ifp->state; |
Herbert Xu | e9d3e08 | 2010-05-18 15:36:06 -0700 | [diff] [blame] | 937 | ifp->state = INET6_IFADDR_STATE_DEAD; |
Herbert Xu | 4c5ff6a | 2010-05-18 15:54:18 -0700 | [diff] [blame] | 938 | spin_unlock_bh(&ifp->state_lock); |
| 939 | |
| 940 | if (state == INET6_IFADDR_STATE_DEAD) |
| 941 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 943 | spin_lock_bh(&addrconf_hash_lock); |
| 944 | hlist_del_init_rcu(&ifp->addr_lst); |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 945 | spin_unlock_bh(&addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | |
| 947 | write_lock_bh(&idev->lock); |
| 948 | #ifdef CONFIG_IPV6_PRIVACY |
| 949 | if (ifp->flags&IFA_F_TEMPORARY) { |
stephen hemminger | 372e6c8 | 2010-03-17 20:31:09 +0000 | [diff] [blame] | 950 | list_del(&ifp->tmp_list); |
| 951 | if (ifp->ifpub) { |
| 952 | in6_ifa_put(ifp->ifpub); |
| 953 | ifp->ifpub = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | } |
stephen hemminger | 372e6c8 | 2010-03-17 20:31:09 +0000 | [diff] [blame] | 955 | __in6_ifa_put(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | } |
| 957 | #endif |
| 958 | |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 959 | list_for_each_entry_safe(ifa, ifn, &idev->addr_list, if_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | if (ifa == ifp) { |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 961 | list_del_init(&ifp->if_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | __in6_ifa_put(ifp); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 963 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) |
| 965 | break; |
| 966 | deleted = 1; |
Kristian Slavov | 1d14280 | 2005-12-21 18:47:24 -0800 | [diff] [blame] | 967 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | } else if (ifp->flags & IFA_F_PERMANENT) { |
| 969 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, |
| 970 | ifp->prefix_len)) { |
| 971 | if (ifa->flags & IFA_F_PERMANENT) { |
| 972 | onlink = 1; |
| 973 | if (deleted) |
| 974 | break; |
| 975 | } else { |
| 976 | unsigned long lifetime; |
| 977 | |
| 978 | if (!onlink) |
| 979 | onlink = -1; |
| 980 | |
| 981 | spin_lock(&ifa->lock); |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 982 | |
| 983 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); |
| 984 | /* |
| 985 | * Note: Because this address is |
| 986 | * not permanent, lifetime < |
| 987 | * LONG_MAX / HZ here. |
| 988 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | if (time_before(expires, |
| 990 | ifa->tstamp + lifetime * HZ)) |
| 991 | expires = ifa->tstamp + lifetime * HZ; |
| 992 | spin_unlock(&ifa->lock); |
| 993 | } |
| 994 | } |
| 995 | } |
| 996 | } |
| 997 | write_unlock_bh(&idev->lock); |
| 998 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 999 | addrconf_del_dad_timer(ifp); |
Andrey Vagin | b223856 | 2008-07-08 15:13:31 -0700 | [diff] [blame] | 1000 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
| 1002 | |
Cong Wang | f88c91d | 2013-04-14 23:18:43 +0800 | [diff] [blame] | 1003 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | /* |
| 1006 | * Purge or update corresponding prefix |
| 1007 | * |
| 1008 | * 1) we don't purge prefix here if address was not permanent. |
| 1009 | * prefix is managed by its own lifetime. |
| 1010 | * 2) if there're no addresses, delete prefix. |
| 1011 | * 3) if there're still other permanent address(es), |
| 1012 | * corresponding prefix is still permanent. |
| 1013 | * 4) otherwise, update prefix lifetime to the |
| 1014 | * longest valid lifetime among the corresponding |
| 1015 | * addresses on the device. |
| 1016 | * Note: subsequent RA will update lifetime. |
| 1017 | * |
| 1018 | * --yoshfuji |
| 1019 | */ |
| 1020 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { |
| 1021 | struct in6_addr prefix; |
| 1022 | struct rt6_info *rt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | |
Nicolas Dichtel | 64c6d08 | 2012-09-26 00:04:55 +0000 | [diff] [blame] | 1024 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); |
Nicolas Dichtel | 64c6d08 | 2012-09-26 00:04:55 +0000 | [diff] [blame] | 1025 | |
Romain Kuntz | 21caa66 | 2013-01-09 21:06:03 +0000 | [diff] [blame] | 1026 | rt = addrconf_get_prefix_route(&prefix, |
| 1027 | ifp->prefix_len, |
| 1028 | ifp->idev->dev, |
| 1029 | 0, RTF_GATEWAY | RTF_DEFAULT); |
| 1030 | |
| 1031 | if (rt) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | if (onlink == 0) { |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 1033 | ip6_del_rt(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | rt = NULL; |
| 1035 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 1036 | rt6_set_expires(rt, expires); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | } |
| 1038 | } |
Amerigo Wang | 94e187c | 2012-10-29 00:13:19 +0000 | [diff] [blame] | 1039 | ip6_rt_put(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | } |
| 1041 | |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 1042 | /* clean up prefsrc entries */ |
| 1043 | rt6_remove_prefsrc(ifp); |
Herbert Xu | 4c5ff6a | 2010-05-18 15:54:18 -0700 | [diff] [blame] | 1044 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | in6_ifa_put(ifp); |
| 1046 | } |
| 1047 | |
| 1048 | #ifdef CONFIG_IPV6_PRIVACY |
| 1049 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) |
| 1050 | { |
| 1051 | struct inet6_dev *idev = ifp->idev; |
| 1052 | struct in6_addr addr, *tmpaddr; |
Lorenzo Colitti | 76f793e | 2011-07-26 13:50:49 +0000 | [diff] [blame] | 1053 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age; |
Benoit Boissinot | eac55bf | 2008-04-02 00:01:35 -0700 | [diff] [blame] | 1054 | unsigned long regen_advance; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | int tmp_plen; |
| 1056 | int ret = 0; |
| 1057 | int max_addresses; |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1058 | u32 addr_flags; |
Lorenzo Colitti | 76f793e | 2011-07-26 13:50:49 +0000 | [diff] [blame] | 1059 | unsigned long now = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | |
| 1061 | write_lock(&idev->lock); |
| 1062 | if (ift) { |
| 1063 | spin_lock_bh(&ift->lock); |
| 1064 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); |
| 1065 | spin_unlock_bh(&ift->lock); |
| 1066 | tmpaddr = &addr; |
| 1067 | } else { |
| 1068 | tmpaddr = NULL; |
| 1069 | } |
| 1070 | retry: |
| 1071 | in6_dev_hold(idev); |
| 1072 | if (idev->cnf.use_tempaddr <= 0) { |
| 1073 | write_unlock(&idev->lock); |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 1074 | pr_info("%s: use_tempaddr is disabled\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | in6_dev_put(idev); |
| 1076 | ret = -1; |
| 1077 | goto out; |
| 1078 | } |
| 1079 | spin_lock_bh(&ifp->lock); |
| 1080 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { |
| 1081 | idev->cnf.use_tempaddr = -1; /*XXX*/ |
| 1082 | spin_unlock_bh(&ifp->lock); |
| 1083 | write_unlock(&idev->lock); |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 1084 | pr_warn("%s: regeneration time exceeded - disabled temporary address support\n", |
| 1085 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | in6_dev_put(idev); |
| 1087 | ret = -1; |
| 1088 | goto out; |
| 1089 | } |
| 1090 | in6_ifa_hold(ifp); |
| 1091 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); |
Sorin Dumitru | eb7e057 | 2012-08-30 02:01:45 +0000 | [diff] [blame] | 1092 | __ipv6_try_regen_rndid(idev, tmpaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | memcpy(&addr.s6_addr[8], idev->rndid, 8); |
Lorenzo Colitti | 76f793e | 2011-07-26 13:50:49 +0000 | [diff] [blame] | 1094 | age = (now - ifp->tstamp) / HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | tmp_valid_lft = min_t(__u32, |
| 1096 | ifp->valid_lft, |
Glenn Wurster | 7a876b0 | 2010-09-27 07:10:10 +0000 | [diff] [blame] | 1097 | idev->cnf.temp_valid_lft + age); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1098 | tmp_prefered_lft = min_t(__u32, |
| 1099 | ifp->prefered_lft, |
Glenn Wurster | 7a876b0 | 2010-09-27 07:10:10 +0000 | [diff] [blame] | 1100 | idev->cnf.temp_prefered_lft + age - |
Ben Hutchings | 784e271 | 2010-06-26 11:42:55 +0000 | [diff] [blame] | 1101 | idev->cnf.max_desync_factor); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | tmp_plen = ifp->prefix_len; |
| 1103 | max_addresses = idev->cnf.max_addresses; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | tmp_tstamp = ifp->tstamp; |
| 1105 | spin_unlock_bh(&ifp->lock); |
| 1106 | |
Benoit Boissinot | eac55bf | 2008-04-02 00:01:35 -0700 | [diff] [blame] | 1107 | regen_advance = idev->cnf.regen_max_retry * |
| 1108 | idev->cnf.dad_transmits * |
| 1109 | idev->nd_parms->retrans_time / HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | write_unlock(&idev->lock); |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1111 | |
Benoit Boissinot | eac55bf | 2008-04-02 00:01:35 -0700 | [diff] [blame] | 1112 | /* A temporary address is created only if this calculated Preferred |
| 1113 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, |
| 1114 | * an implementation must not create a temporary address with a zero |
| 1115 | * Preferred Lifetime. |
| 1116 | */ |
| 1117 | if (tmp_prefered_lft <= regen_advance) { |
| 1118 | in6_ifa_put(ifp); |
| 1119 | in6_dev_put(idev); |
| 1120 | ret = -1; |
| 1121 | goto out; |
| 1122 | } |
| 1123 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1124 | addr_flags = IFA_F_TEMPORARY; |
| 1125 | /* set in addrconf_prefix_rcv() */ |
| 1126 | if (ifp->flags & IFA_F_OPTIMISTIC) |
| 1127 | addr_flags |= IFA_F_OPTIMISTIC; |
| 1128 | |
Hannes Frederic Sowa | 4b08a8f | 2013-08-16 13:02:27 +0200 | [diff] [blame] | 1129 | ift = ipv6_add_addr(idev, &addr, NULL, tmp_plen, |
| 1130 | ipv6_addr_scope(&addr), addr_flags, |
| 1131 | tmp_valid_lft, tmp_prefered_lft); |
| 1132 | if (IS_ERR(ift)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | in6_ifa_put(ifp); |
| 1134 | in6_dev_put(idev); |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 1135 | pr_info("%s: retry temporary address regeneration\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | tmpaddr = &addr; |
| 1137 | write_lock(&idev->lock); |
| 1138 | goto retry; |
| 1139 | } |
| 1140 | |
| 1141 | spin_lock_bh(&ift->lock); |
| 1142 | ift->ifpub = ifp; |
Lorenzo Colitti | 76f793e | 2011-07-26 13:50:49 +0000 | [diff] [blame] | 1143 | ift->cstamp = now; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | ift->tstamp = tmp_tstamp; |
| 1145 | spin_unlock_bh(&ift->lock); |
| 1146 | |
David S. Miller | cf22f9a | 2012-04-14 21:37:40 -0400 | [diff] [blame] | 1147 | addrconf_dad_start(ift); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | in6_ifa_put(ift); |
| 1149 | in6_dev_put(idev); |
| 1150 | out: |
| 1151 | return ret; |
| 1152 | } |
| 1153 | #endif |
| 1154 | |
| 1155 | /* |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1156 | * Choose an appropriate source address (RFC3484) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | */ |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1158 | enum { |
| 1159 | IPV6_SADDR_RULE_INIT = 0, |
| 1160 | IPV6_SADDR_RULE_LOCAL, |
| 1161 | IPV6_SADDR_RULE_SCOPE, |
| 1162 | IPV6_SADDR_RULE_PREFERRED, |
| 1163 | #ifdef CONFIG_IPV6_MIP6 |
| 1164 | IPV6_SADDR_RULE_HOA, |
| 1165 | #endif |
| 1166 | IPV6_SADDR_RULE_OIF, |
| 1167 | IPV6_SADDR_RULE_LABEL, |
| 1168 | #ifdef CONFIG_IPV6_PRIVACY |
| 1169 | IPV6_SADDR_RULE_PRIVACY, |
| 1170 | #endif |
| 1171 | IPV6_SADDR_RULE_ORCHID, |
| 1172 | IPV6_SADDR_RULE_PREFIX, |
| 1173 | IPV6_SADDR_RULE_MAX |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1174 | }; |
| 1175 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1176 | struct ipv6_saddr_score { |
| 1177 | int rule; |
| 1178 | int addr_type; |
| 1179 | struct inet6_ifaddr *ifa; |
| 1180 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); |
| 1181 | int scopedist; |
| 1182 | int matchlen; |
| 1183 | }; |
| 1184 | |
| 1185 | struct ipv6_saddr_dst { |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 1186 | const struct in6_addr *addr; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1187 | int ifindex; |
| 1188 | int scope; |
| 1189 | int label; |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1190 | unsigned int prefs; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1191 | }; |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1192 | |
Dave Jones | b6f99a2 | 2007-03-22 12:27:49 -0700 | [diff] [blame] | 1193 | static inline int ipv6_saddr_preferred(int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | { |
Ulrich Weber | 45bb006 | 2010-02-25 23:28:58 +0000 | [diff] [blame] | 1195 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK)) |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1196 | return 1; |
| 1197 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | } |
| 1199 | |
Benjamin Thery | 3de2325 | 2008-05-28 14:51:24 +0200 | [diff] [blame] | 1200 | static int ipv6_get_saddr_eval(struct net *net, |
| 1201 | struct ipv6_saddr_score *score, |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1202 | struct ipv6_saddr_dst *dst, |
| 1203 | int i) |
| 1204 | { |
| 1205 | int ret; |
| 1206 | |
| 1207 | if (i <= score->rule) { |
| 1208 | switch (i) { |
| 1209 | case IPV6_SADDR_RULE_SCOPE: |
| 1210 | ret = score->scopedist; |
| 1211 | break; |
| 1212 | case IPV6_SADDR_RULE_PREFIX: |
| 1213 | ret = score->matchlen; |
| 1214 | break; |
| 1215 | default: |
| 1216 | ret = !!test_bit(i, score->scorebits); |
| 1217 | } |
| 1218 | goto out; |
| 1219 | } |
| 1220 | |
| 1221 | switch (i) { |
| 1222 | case IPV6_SADDR_RULE_INIT: |
| 1223 | /* Rule 0: remember if hiscore is not ready yet */ |
| 1224 | ret = !!score->ifa; |
| 1225 | break; |
| 1226 | case IPV6_SADDR_RULE_LOCAL: |
| 1227 | /* Rule 1: Prefer same address */ |
| 1228 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); |
| 1229 | break; |
| 1230 | case IPV6_SADDR_RULE_SCOPE: |
| 1231 | /* Rule 2: Prefer appropriate scope |
| 1232 | * |
| 1233 | * ret |
| 1234 | * ^ |
| 1235 | * -1 | d 15 |
| 1236 | * ---+--+-+---> scope |
| 1237 | * | |
| 1238 | * | d is scope of the destination. |
| 1239 | * B-d | \ |
| 1240 | * | \ <- smaller scope is better if |
| 1241 | * B-15 | \ if scope is enough for destinaion. |
| 1242 | * | ret = B - scope (-1 <= scope >= d <= 15). |
| 1243 | * d-C-1 | / |
| 1244 | * |/ <- greater is better |
| 1245 | * -C / if scope is not enough for destination. |
| 1246 | * /| ret = scope - C (-1 <= d < scope <= 15). |
| 1247 | * |
| 1248 | * d - C - 1 < B -15 (for all -1 <= d <= 15). |
| 1249 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. |
| 1250 | * Assume B = 0 and we get C > 29. |
| 1251 | */ |
| 1252 | ret = __ipv6_addr_src_scope(score->addr_type); |
| 1253 | if (ret >= dst->scope) |
| 1254 | ret = -ret; |
| 1255 | else |
| 1256 | ret -= 128; /* 30 is enough */ |
| 1257 | score->scopedist = ret; |
| 1258 | break; |
| 1259 | case IPV6_SADDR_RULE_PREFERRED: |
| 1260 | /* Rule 3: Avoid deprecated and optimistic addresses */ |
| 1261 | ret = ipv6_saddr_preferred(score->addr_type) || |
| 1262 | !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)); |
| 1263 | break; |
| 1264 | #ifdef CONFIG_IPV6_MIP6 |
| 1265 | case IPV6_SADDR_RULE_HOA: |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1266 | { |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1267 | /* Rule 4: Prefer home address */ |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1268 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
| 1269 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1270 | break; |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1271 | } |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1272 | #endif |
| 1273 | case IPV6_SADDR_RULE_OIF: |
| 1274 | /* Rule 5: Prefer outgoing interface */ |
| 1275 | ret = (!dst->ifindex || |
| 1276 | dst->ifindex == score->ifa->idev->dev->ifindex); |
| 1277 | break; |
| 1278 | case IPV6_SADDR_RULE_LABEL: |
| 1279 | /* Rule 6: Prefer matching label */ |
Benjamin Thery | 3de2325 | 2008-05-28 14:51:24 +0200 | [diff] [blame] | 1280 | ret = ipv6_addr_label(net, |
| 1281 | &score->ifa->addr, score->addr_type, |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1282 | score->ifa->idev->dev->ifindex) == dst->label; |
| 1283 | break; |
| 1284 | #ifdef CONFIG_IPV6_PRIVACY |
| 1285 | case IPV6_SADDR_RULE_PRIVACY: |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1286 | { |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1287 | /* Rule 7: Prefer public address |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1288 | * Note: prefer temporary address if use_tempaddr >= 2 |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1289 | */ |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1290 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
| 1291 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : |
| 1292 | score->ifa->idev->cnf.use_tempaddr >= 2; |
| 1293 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1294 | break; |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1295 | } |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1296 | #endif |
| 1297 | case IPV6_SADDR_RULE_ORCHID: |
| 1298 | /* Rule 8-: Prefer ORCHID vs ORCHID or |
| 1299 | * non-ORCHID vs non-ORCHID |
| 1300 | */ |
| 1301 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ |
| 1302 | ipv6_addr_orchid(dst->addr)); |
| 1303 | break; |
| 1304 | case IPV6_SADDR_RULE_PREFIX: |
| 1305 | /* Rule 8: Use longest matching prefix */ |
YOSHIFUJI Hideaki / 吉藤英明 | 91b4b04 | 2012-09-10 18:41:07 +0000 | [diff] [blame] | 1306 | ret = ipv6_addr_diff(&score->ifa->addr, dst->addr); |
| 1307 | if (ret > score->ifa->prefix_len) |
| 1308 | ret = score->ifa->prefix_len; |
| 1309 | score->matchlen = ret; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1310 | break; |
| 1311 | default: |
| 1312 | ret = 0; |
| 1313 | } |
| 1314 | |
| 1315 | if (ret) |
| 1316 | __set_bit(i, score->scorebits); |
| 1317 | score->rule = i; |
| 1318 | out: |
| 1319 | return ret; |
| 1320 | } |
| 1321 | |
Patrick McHardy | b3f644f | 2012-08-26 19:14:14 +0200 | [diff] [blame] | 1322 | 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] | 1323 | const struct in6_addr *daddr, unsigned int prefs, |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1324 | struct in6_addr *saddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1325 | { |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1326 | struct ipv6_saddr_score scores[2], |
| 1327 | *score = &scores[0], *hiscore = &scores[1]; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1328 | struct ipv6_saddr_dst dst; |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1329 | struct net_device *dev; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1330 | int dst_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1332 | dst_type = __ipv6_addr_type(daddr); |
| 1333 | dst.addr = daddr; |
| 1334 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; |
| 1335 | dst.scope = __ipv6_addr_src_scope(dst_type); |
Benjamin Thery | 3de2325 | 2008-05-28 14:51:24 +0200 | [diff] [blame] | 1336 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1337 | dst.prefs = prefs; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1338 | |
| 1339 | hiscore->rule = -1; |
| 1340 | hiscore->ifa = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1342 | rcu_read_lock(); |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1343 | |
Eric Dumazet | c6d14c8 | 2009-11-04 05:43:23 -0800 | [diff] [blame] | 1344 | for_each_netdev_rcu(net, dev) { |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1345 | struct inet6_dev *idev; |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1346 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1347 | /* Candidate Source Address (section 4) |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1348 | * - multicast and link-local destination address, |
| 1349 | * the set of candidate source address MUST only |
| 1350 | * include addresses assigned to interfaces |
| 1351 | * belonging to the same link as the outgoing |
| 1352 | * interface. |
| 1353 | * (- For site-local destination addresses, the |
| 1354 | * set of candidate source addresses MUST only |
| 1355 | * include addresses assigned to interfaces |
| 1356 | * belonging to the same site as the outgoing |
| 1357 | * interface.) |
| 1358 | */ |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1359 | if (((dst_type & IPV6_ADDR_MULTICAST) || |
| 1360 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && |
| 1361 | dst.ifindex && dev->ifindex != dst.ifindex) |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1362 | continue; |
| 1363 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1364 | idev = __in6_dev_get(dev); |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1365 | if (!idev) |
| 1366 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1367 | |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1368 | read_lock_bh(&idev->lock); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 1369 | list_for_each_entry(score->ifa, &idev->addr_list, if_list) { |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1370 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1372 | /* |
YOSHIFUJI Hideaki | 6b3ae80 | 2005-12-21 22:58:01 +0900 | [diff] [blame] | 1373 | * - Tentative Address (RFC2462 section 5.4) |
| 1374 | * - A tentative address is not considered |
| 1375 | * "assigned to an interface" in the traditional |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1376 | * sense, unless it is also flagged as optimistic. |
YOSHIFUJI Hideaki | 6b3ae80 | 2005-12-21 22:58:01 +0900 | [diff] [blame] | 1377 | * - Candidate Source Address (section 4) |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1378 | * - In any case, anycast addresses, multicast |
| 1379 | * addresses, and the unspecified address MUST |
| 1380 | * NOT be included in a candidate set. |
| 1381 | */ |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1382 | if ((score->ifa->flags & IFA_F_TENTATIVE) && |
| 1383 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) |
YOSHIFUJI Hideaki | 6b3ae80 | 2005-12-21 22:58:01 +0900 | [diff] [blame] | 1384 | continue; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1385 | |
| 1386 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); |
| 1387 | |
| 1388 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || |
| 1389 | score->addr_type & IPV6_ADDR_MULTICAST)) { |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1390 | LIMIT_NETDEBUG(KERN_DEBUG |
Joe Perches | 3b6d821c | 2007-11-19 23:47:25 -0800 | [diff] [blame] | 1391 | "ADDRCONF: unspecified / multicast address " |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1392 | "assigned as unicast address on %s", |
| 1393 | dev->name); |
| 1394 | continue; |
| 1395 | } |
| 1396 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1397 | score->rule = -1; |
| 1398 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1399 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1400 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { |
| 1401 | int minihiscore, miniscore; |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1402 | |
Benjamin Thery | 3de2325 | 2008-05-28 14:51:24 +0200 | [diff] [blame] | 1403 | minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i); |
| 1404 | miniscore = ipv6_get_saddr_eval(net, score, &dst, i); |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1405 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1406 | if (minihiscore > miniscore) { |
| 1407 | if (i == IPV6_SADDR_RULE_SCOPE && |
| 1408 | score->scopedist > 0) { |
| 1409 | /* |
| 1410 | * special case: |
| 1411 | * each remaining entry |
| 1412 | * has too small (not enough) |
| 1413 | * scope, because ifa entries |
| 1414 | * are sorted by their scope |
| 1415 | * values. |
| 1416 | */ |
| 1417 | goto try_nextdev; |
| 1418 | } |
| 1419 | break; |
| 1420 | } else if (minihiscore < miniscore) { |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1421 | if (hiscore->ifa) |
| 1422 | in6_ifa_put(hiscore->ifa); |
| 1423 | |
| 1424 | in6_ifa_hold(score->ifa); |
| 1425 | |
Ilpo Järvinen | a0bffff | 2009-03-21 13:36:17 -0700 | [diff] [blame] | 1426 | swap(hiscore, score); |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1427 | |
| 1428 | /* restore our iterator */ |
| 1429 | score->ifa = hiscore->ifa; |
| 1430 | |
| 1431 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1432 | } |
| 1433 | } |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1434 | } |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1435 | try_nextdev: |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1436 | read_unlock_bh(&idev->lock); |
| 1437 | } |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1438 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1440 | if (!hiscore->ifa) |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1441 | return -EADDRNOTAVAIL; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1442 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1443 | *saddr = hiscore->ifa->addr; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1444 | in6_ifa_put(hiscore->ifa); |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1445 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1446 | } |
YOSHIFUJI Hideaki | 5e5f3f0 | 2008-03-03 21:44:34 +0900 | [diff] [blame] | 1447 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1448 | |
Amerigo Wang | 8965779 | 2013-06-29 21:30:49 +0800 | [diff] [blame] | 1449 | int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, |
| 1450 | unsigned char banned_flags) |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 1451 | { |
| 1452 | struct inet6_ifaddr *ifp; |
| 1453 | int err = -EADDRNOTAVAIL; |
| 1454 | |
| 1455 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
| 1456 | if (ifp->scope == IFA_LINK && |
| 1457 | !(ifp->flags & banned_flags)) { |
| 1458 | *addr = ifp->addr; |
| 1459 | err = 0; |
| 1460 | break; |
| 1461 | } |
| 1462 | } |
| 1463 | return err; |
| 1464 | } |
| 1465 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1466 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
| 1467 | unsigned char banned_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1468 | { |
| 1469 | struct inet6_dev *idev; |
| 1470 | int err = -EADDRNOTAVAIL; |
| 1471 | |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1472 | rcu_read_lock(); |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 1473 | idev = __in6_dev_get(dev); |
| 1474 | if (idev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1475 | read_lock_bh(&idev->lock); |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 1476 | err = __ipv6_get_lladdr(idev, addr, banned_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | read_unlock_bh(&idev->lock); |
| 1478 | } |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1479 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1480 | return err; |
| 1481 | } |
| 1482 | |
| 1483 | static int ipv6_count_addresses(struct inet6_dev *idev) |
| 1484 | { |
| 1485 | int cnt = 0; |
| 1486 | struct inet6_ifaddr *ifp; |
| 1487 | |
| 1488 | read_lock_bh(&idev->lock); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 1489 | list_for_each_entry(ifp, &idev->addr_list, if_list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1490 | cnt++; |
| 1491 | read_unlock_bh(&idev->lock); |
| 1492 | return cnt; |
| 1493 | } |
| 1494 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1495 | int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
Florian Westphal | 2a7851b | 2013-05-17 03:56:10 +0000 | [diff] [blame] | 1496 | const struct net_device *dev, int strict) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1497 | { |
Stephen Hemminger | eedf042 | 2010-05-17 22:27:12 -0700 | [diff] [blame] | 1498 | struct inet6_ifaddr *ifp; |
Eric Dumazet | ddbe503 | 2012-07-18 08:11:12 +0000 | [diff] [blame] | 1499 | unsigned int hash = inet6_addr_hash(addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1500 | |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 1501 | rcu_read_lock_bh(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1502 | hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) { |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 1503 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
Daniel Lezcano | bfeade0 | 2008-01-10 22:43:18 -0800 | [diff] [blame] | 1504 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1505 | if (ipv6_addr_equal(&ifp->addr, addr) && |
Stephen Hemminger | eedf042 | 2010-05-17 22:27:12 -0700 | [diff] [blame] | 1506 | !(ifp->flags&IFA_F_TENTATIVE) && |
| 1507 | (dev == NULL || ifp->idev->dev == dev || |
| 1508 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) { |
| 1509 | rcu_read_unlock_bh(); |
| 1510 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1511 | } |
| 1512 | } |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 1513 | |
Stephen Hemminger | eedf042 | 2010-05-17 22:27:12 -0700 | [diff] [blame] | 1514 | rcu_read_unlock_bh(); |
| 1515 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1516 | } |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 1517 | EXPORT_SYMBOL(ipv6_chk_addr); |
| 1518 | |
David S. Miller | 3e81c6d | 2010-03-20 16:18:00 -0700 | [diff] [blame] | 1519 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
| 1520 | struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1521 | { |
Eric Dumazet | ddbe503 | 2012-07-18 08:11:12 +0000 | [diff] [blame] | 1522 | unsigned int hash = inet6_addr_hash(addr); |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 1523 | struct inet6_ifaddr *ifp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1524 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1525 | hlist_for_each_entry(ifp, &inet6_addr_lst[hash], addr_lst) { |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 1526 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
Daniel Lezcano | 06bfe65 | 2008-01-10 22:43:42 -0800 | [diff] [blame] | 1527 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1528 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
| 1529 | if (dev == NULL || ifp->idev->dev == dev) |
David S. Miller | 3e81c6d | 2010-03-20 16:18:00 -0700 | [diff] [blame] | 1530 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1531 | } |
| 1532 | } |
David S. Miller | 3e81c6d | 2010-03-20 16:18:00 -0700 | [diff] [blame] | 1533 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1534 | } |
| 1535 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1536 | 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] | 1537 | { |
| 1538 | struct inet6_dev *idev; |
| 1539 | struct inet6_ifaddr *ifa; |
| 1540 | int onlink; |
| 1541 | |
| 1542 | onlink = 0; |
| 1543 | rcu_read_lock(); |
| 1544 | idev = __in6_dev_get(dev); |
| 1545 | if (idev) { |
| 1546 | read_lock_bh(&idev->lock); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 1547 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
YOSHIFUJI Hideaki | 52eeeb8 | 2008-03-15 22:54:23 -0400 | [diff] [blame] | 1548 | onlink = ipv6_prefix_equal(addr, &ifa->addr, |
| 1549 | ifa->prefix_len); |
| 1550 | if (onlink) |
| 1551 | break; |
| 1552 | } |
| 1553 | read_unlock_bh(&idev->lock); |
| 1554 | } |
| 1555 | rcu_read_unlock(); |
| 1556 | return onlink; |
| 1557 | } |
YOSHIFUJI Hideaki | 52eeeb8 | 2008-03-15 22:54:23 -0400 | [diff] [blame] | 1558 | EXPORT_SYMBOL(ipv6_chk_prefix); |
| 1559 | |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 1560 | 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] | 1561 | struct net_device *dev, int strict) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1562 | { |
David S. Miller | b79d1d5 | 2010-03-25 21:39:21 -0700 | [diff] [blame] | 1563 | struct inet6_ifaddr *ifp, *result = NULL; |
Eric Dumazet | ddbe503 | 2012-07-18 08:11:12 +0000 | [diff] [blame] | 1564 | unsigned int hash = inet6_addr_hash(addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1565 | |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 1566 | rcu_read_lock_bh(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1567 | 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] | 1568 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
Daniel Lezcano | 1cab3da | 2008-01-10 22:44:09 -0800 | [diff] [blame] | 1569 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
| 1571 | if (dev == NULL || ifp->idev->dev == dev || |
| 1572 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { |
David S. Miller | b79d1d5 | 2010-03-25 21:39:21 -0700 | [diff] [blame] | 1573 | result = ifp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1574 | in6_ifa_hold(ifp); |
| 1575 | break; |
| 1576 | } |
| 1577 | } |
| 1578 | } |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 1579 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1580 | |
David S. Miller | b79d1d5 | 2010-03-25 21:39:21 -0700 | [diff] [blame] | 1581 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1582 | } |
| 1583 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1584 | /* Gets referenced address, destroys ifaddr */ |
| 1585 | |
Brian Haley | cc411d0 | 2009-09-09 14:41:32 +0000 | [diff] [blame] | 1586 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1587 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1588 | if (ifp->flags&IFA_F_PERMANENT) { |
| 1589 | spin_lock_bh(&ifp->lock); |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 1590 | addrconf_del_dad_timer(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1591 | ifp->flags |= IFA_F_TENTATIVE; |
Brian Haley | cc411d0 | 2009-09-09 14:41:32 +0000 | [diff] [blame] | 1592 | if (dad_failed) |
| 1593 | ifp->flags |= IFA_F_DADFAILED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1594 | spin_unlock_bh(&ifp->lock); |
Herbert Xu | e2577a0 | 2010-03-13 12:23:29 -0800 | [diff] [blame] | 1595 | if (dad_failed) |
| 1596 | ipv6_ifa_notify(0, ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1597 | in6_ifa_put(ifp); |
| 1598 | #ifdef CONFIG_IPV6_PRIVACY |
| 1599 | } else if (ifp->flags&IFA_F_TEMPORARY) { |
| 1600 | struct inet6_ifaddr *ifpub; |
| 1601 | spin_lock_bh(&ifp->lock); |
| 1602 | ifpub = ifp->ifpub; |
| 1603 | if (ifpub) { |
| 1604 | in6_ifa_hold(ifpub); |
| 1605 | spin_unlock_bh(&ifp->lock); |
| 1606 | ipv6_create_tempaddr(ifpub, ifp); |
| 1607 | in6_ifa_put(ifpub); |
| 1608 | } else { |
| 1609 | spin_unlock_bh(&ifp->lock); |
| 1610 | } |
| 1611 | ipv6_del_addr(ifp); |
| 1612 | #endif |
| 1613 | } else |
| 1614 | ipv6_del_addr(ifp); |
| 1615 | } |
| 1616 | |
Herbert Xu | f2344a1 | 2010-05-18 15:55:27 -0700 | [diff] [blame] | 1617 | static int addrconf_dad_end(struct inet6_ifaddr *ifp) |
| 1618 | { |
| 1619 | int err = -ENOENT; |
| 1620 | |
| 1621 | spin_lock(&ifp->state_lock); |
| 1622 | if (ifp->state == INET6_IFADDR_STATE_DAD) { |
| 1623 | ifp->state = INET6_IFADDR_STATE_POSTDAD; |
| 1624 | err = 0; |
| 1625 | } |
| 1626 | spin_unlock(&ifp->state_lock); |
| 1627 | |
| 1628 | return err; |
| 1629 | } |
| 1630 | |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 1631 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
| 1632 | { |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 1633 | struct inet6_dev *idev = ifp->idev; |
Brian Haley | 9bdd8d4 | 2009-03-18 18:22:48 -0700 | [diff] [blame] | 1634 | |
Ursula Braun | 853dc2e | 2010-10-24 23:06:43 +0000 | [diff] [blame] | 1635 | if (addrconf_dad_end(ifp)) { |
| 1636 | in6_ifa_put(ifp); |
Herbert Xu | f2344a1 | 2010-05-18 15:55:27 -0700 | [diff] [blame] | 1637 | return; |
Ursula Braun | 853dc2e | 2010-10-24 23:06:43 +0000 | [diff] [blame] | 1638 | } |
Herbert Xu | f2344a1 | 2010-05-18 15:55:27 -0700 | [diff] [blame] | 1639 | |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 1640 | net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n", |
| 1641 | ifp->idev->dev->name, &ifp->addr); |
Brian Haley | 9bdd8d4 | 2009-03-18 18:22:48 -0700 | [diff] [blame] | 1642 | |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 1643 | if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) { |
| 1644 | struct in6_addr addr; |
| 1645 | |
| 1646 | addr.s6_addr32[0] = htonl(0xfe800000); |
| 1647 | addr.s6_addr32[1] = 0; |
| 1648 | |
| 1649 | if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && |
| 1650 | ipv6_addr_equal(&ifp->addr, &addr)) { |
| 1651 | /* DAD failed for link-local based on MAC address */ |
| 1652 | idev->cnf.disable_ipv6 = 1; |
Brian Haley | 9bdd8d4 | 2009-03-18 18:22:48 -0700 | [diff] [blame] | 1653 | |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 1654 | pr_info("%s: IPv6 being disabled!\n", |
Brian Haley | 9bdd8d4 | 2009-03-18 18:22:48 -0700 | [diff] [blame] | 1655 | ifp->idev->dev->name); |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 1656 | } |
| 1657 | } |
| 1658 | |
Brian Haley | cc411d0 | 2009-09-09 14:41:32 +0000 | [diff] [blame] | 1659 | addrconf_dad_stop(ifp, 1); |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 1660 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1661 | |
| 1662 | /* Join to solicited addr multicast group. */ |
| 1663 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1664 | 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] | 1665 | { |
| 1666 | struct in6_addr maddr; |
| 1667 | |
| 1668 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) |
| 1669 | return; |
| 1670 | |
| 1671 | addrconf_addr_solict_mult(addr, &maddr); |
| 1672 | ipv6_dev_mc_inc(dev, &maddr); |
| 1673 | } |
| 1674 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1675 | 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] | 1676 | { |
| 1677 | struct in6_addr maddr; |
| 1678 | |
| 1679 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) |
| 1680 | return; |
| 1681 | |
| 1682 | addrconf_addr_solict_mult(addr, &maddr); |
| 1683 | __ipv6_dev_mc_dec(idev, &maddr); |
| 1684 | } |
| 1685 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 1686 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1687 | { |
| 1688 | struct in6_addr addr; |
Bjørn Mork | 2bda8a0 | 2011-07-05 23:04:13 +0000 | [diff] [blame] | 1689 | if (ifp->prefix_len == 127) /* RFC 6164 */ |
| 1690 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1691 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
| 1692 | if (ipv6_addr_any(&addr)) |
| 1693 | return; |
| 1694 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); |
| 1695 | } |
| 1696 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 1697 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1698 | { |
| 1699 | struct in6_addr addr; |
YOSHIFUJI Hideaki | 32019e6 | 2011-07-24 11:44:34 +0000 | [diff] [blame] | 1700 | if (ifp->prefix_len == 127) /* RFC 6164 */ |
| 1701 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1702 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
| 1703 | if (ipv6_addr_any(&addr)) |
| 1704 | return; |
| 1705 | __ipv6_dev_ac_dec(ifp->idev, &addr); |
| 1706 | } |
| 1707 | |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 1708 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
| 1709 | { |
| 1710 | if (dev->addr_len != ETH_ALEN) |
| 1711 | return -1; |
| 1712 | memcpy(eui, dev->dev_addr, 3); |
| 1713 | memcpy(eui + 5, dev->dev_addr + 3, 3); |
| 1714 | |
| 1715 | /* |
| 1716 | * The zSeries OSA network cards can be shared among various |
| 1717 | * OS instances, but the OSA cards have only one MAC address. |
| 1718 | * This leads to duplicate address conflicts in conjunction |
| 1719 | * with IPv6 if more than one instance uses the same card. |
| 1720 | * |
| 1721 | * The driver for these cards can deliver a unique 16-bit |
| 1722 | * identifier for each instance sharing the same card. It is |
| 1723 | * placed instead of 0xFFFE in the interface identifier. The |
| 1724 | * "u" bit of the interface identifier is not inverted in this |
| 1725 | * case. Hence the resulting interface identifier has local |
| 1726 | * scope according to RFC2373. |
| 1727 | */ |
| 1728 | if (dev->dev_id) { |
| 1729 | eui[3] = (dev->dev_id >> 8) & 0xFF; |
| 1730 | eui[4] = dev->dev_id & 0xFF; |
| 1731 | } else { |
| 1732 | eui[3] = 0xFF; |
| 1733 | eui[4] = 0xFE; |
| 1734 | eui[0] ^= 2; |
| 1735 | } |
| 1736 | return 0; |
| 1737 | } |
| 1738 | |
alex.bluesman.smirnov@gmail.com | 06a4c1c | 2012-05-10 03:25:52 +0000 | [diff] [blame] | 1739 | static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev) |
| 1740 | { |
| 1741 | if (dev->addr_len != IEEE802154_ADDR_LEN) |
| 1742 | return -1; |
| 1743 | memcpy(eui, dev->dev_addr, 8); |
YOSHIFUJI Hideaki / 吉藤英明 | 5e98a36 | 2013-01-28 10:44:29 +0000 | [diff] [blame] | 1744 | eui[0] ^= 2; |
alex.bluesman.smirnov@gmail.com | 06a4c1c | 2012-05-10 03:25:52 +0000 | [diff] [blame] | 1745 | return 0; |
| 1746 | } |
| 1747 | |
YOSHIFUJI Hideaki / 吉藤英明 | cb6bf35 | 2013-03-25 08:26:24 +0000 | [diff] [blame] | 1748 | static int addrconf_ifid_ieee1394(u8 *eui, struct net_device *dev) |
| 1749 | { |
| 1750 | union fwnet_hwaddr *ha; |
| 1751 | |
| 1752 | if (dev->addr_len != FWNET_ALEN) |
| 1753 | return -1; |
| 1754 | |
| 1755 | ha = (union fwnet_hwaddr *)dev->dev_addr; |
| 1756 | |
| 1757 | memcpy(eui, &ha->uc.uniq_id, sizeof(ha->uc.uniq_id)); |
| 1758 | eui[0] ^= 2; |
| 1759 | return 0; |
| 1760 | } |
| 1761 | |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 1762 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) |
| 1763 | { |
| 1764 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ |
| 1765 | if (dev->addr_len != ARCNET_ALEN) |
| 1766 | return -1; |
| 1767 | memset(eui, 0, 7); |
Eldad Zack | 8e5e8f3 | 2012-04-01 07:49:08 +0000 | [diff] [blame] | 1768 | eui[7] = *(u8 *)dev->dev_addr; |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 1769 | return 0; |
| 1770 | } |
| 1771 | |
| 1772 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) |
| 1773 | { |
| 1774 | if (dev->addr_len != INFINIBAND_ALEN) |
| 1775 | return -1; |
| 1776 | memcpy(eui, dev->dev_addr + 12, 8); |
| 1777 | eui[0] |= 2; |
| 1778 | return 0; |
| 1779 | } |
| 1780 | |
stephen hemminger | c61393e | 2010-10-04 20:17:53 +0000 | [diff] [blame] | 1781 | static int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
YOSHIFUJI Hideaki | dfd982b | 2008-04-10 15:42:09 +0900 | [diff] [blame] | 1782 | { |
Sascha Hlusiak | 9af2851 | 2009-05-19 12:56:51 +0000 | [diff] [blame] | 1783 | if (addr == 0) |
| 1784 | return -1; |
YOSHIFUJI Hideaki | dfd982b | 2008-04-10 15:42:09 +0900 | [diff] [blame] | 1785 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || |
| 1786 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || |
| 1787 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || |
| 1788 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || |
| 1789 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || |
| 1790 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; |
| 1791 | eui[1] = 0; |
| 1792 | eui[2] = 0x5E; |
| 1793 | eui[3] = 0xFE; |
| 1794 | memcpy(eui + 4, &addr, 4); |
| 1795 | return 0; |
| 1796 | } |
YOSHIFUJI Hideaki | dfd982b | 2008-04-10 15:42:09 +0900 | [diff] [blame] | 1797 | |
| 1798 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) |
| 1799 | { |
| 1800 | if (dev->priv_flags & IFF_ISATAP) |
| 1801 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); |
| 1802 | return -1; |
| 1803 | } |
| 1804 | |
stephen hemminger | aee80b5 | 2011-06-08 10:44:30 +0000 | [diff] [blame] | 1805 | static int addrconf_ifid_gre(u8 *eui, struct net_device *dev) |
| 1806 | { |
| 1807 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); |
| 1808 | } |
| 1809 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1810 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
| 1811 | { |
| 1812 | switch (dev->type) { |
| 1813 | case ARPHRD_ETHER: |
| 1814 | case ARPHRD_FDDI: |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 1815 | return addrconf_ifid_eui48(eui, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1816 | case ARPHRD_ARCNET: |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 1817 | return addrconf_ifid_arcnet(eui, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1818 | case ARPHRD_INFINIBAND: |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 1819 | return addrconf_ifid_infiniband(eui, dev); |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 1820 | case ARPHRD_SIT: |
YOSHIFUJI Hideaki | dfd982b | 2008-04-10 15:42:09 +0900 | [diff] [blame] | 1821 | return addrconf_ifid_sit(eui, dev); |
stephen hemminger | aee80b5 | 2011-06-08 10:44:30 +0000 | [diff] [blame] | 1822 | case ARPHRD_IPGRE: |
| 1823 | return addrconf_ifid_gre(eui, dev); |
alex.bluesman.smirnov@gmail.com | 06a4c1c | 2012-05-10 03:25:52 +0000 | [diff] [blame] | 1824 | case ARPHRD_IEEE802154: |
| 1825 | return addrconf_ifid_eui64(eui, dev); |
YOSHIFUJI Hideaki / 吉藤英明 | cb6bf35 | 2013-03-25 08:26:24 +0000 | [diff] [blame] | 1826 | case ARPHRD_IEEE1394: |
| 1827 | return addrconf_ifid_ieee1394(eui, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1828 | } |
| 1829 | return -1; |
| 1830 | } |
| 1831 | |
| 1832 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) |
| 1833 | { |
| 1834 | int err = -1; |
| 1835 | struct inet6_ifaddr *ifp; |
| 1836 | |
| 1837 | read_lock_bh(&idev->lock); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 1838 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1839 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { |
| 1840 | memcpy(eui, ifp->addr.s6_addr+8, 8); |
| 1841 | err = 0; |
| 1842 | break; |
| 1843 | } |
| 1844 | } |
| 1845 | read_unlock_bh(&idev->lock); |
| 1846 | return err; |
| 1847 | } |
| 1848 | |
| 1849 | #ifdef CONFIG_IPV6_PRIVACY |
| 1850 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ |
Sorin Dumitru | eb7e057 | 2012-08-30 02:01:45 +0000 | [diff] [blame] | 1851 | static void __ipv6_regen_rndid(struct inet6_dev *idev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1852 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1853 | regen: |
YOSHIFUJI Hideaki | 955189e | 2006-03-20 16:54:09 -0800 | [diff] [blame] | 1854 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1855 | idev->rndid[0] &= ~0x02; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1856 | |
| 1857 | /* |
| 1858 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: |
| 1859 | * check if generated address is not inappropriate |
| 1860 | * |
| 1861 | * - Reserved subnet anycast (RFC 2526) |
| 1862 | * 11111101 11....11 1xxxxxxx |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 1863 | * - ISATAP (RFC4214) 6.1 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1864 | * 00-00-5E-FE-xx-xx-xx-xx |
| 1865 | * - value 0 |
| 1866 | * - XXX: already assigned to an address on the device |
| 1867 | */ |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1868 | if (idev->rndid[0] == 0xfd && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1869 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
| 1870 | (idev->rndid[7]&0x80)) |
| 1871 | goto regen; |
| 1872 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { |
| 1873 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) |
| 1874 | goto regen; |
| 1875 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) |
| 1876 | goto regen; |
| 1877 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1878 | } |
| 1879 | |
| 1880 | static void ipv6_regen_rndid(unsigned long data) |
| 1881 | { |
| 1882 | struct inet6_dev *idev = (struct inet6_dev *) data; |
| 1883 | unsigned long expires; |
| 1884 | |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1885 | rcu_read_lock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1886 | write_lock_bh(&idev->lock); |
| 1887 | |
| 1888 | if (idev->dead) |
| 1889 | goto out; |
| 1890 | |
Sorin Dumitru | eb7e057 | 2012-08-30 02:01:45 +0000 | [diff] [blame] | 1891 | __ipv6_regen_rndid(idev); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1892 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1893 | expires = jiffies + |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1894 | idev->cnf.temp_prefered_lft * HZ - |
Ben Hutchings | 784e271 | 2010-06-26 11:42:55 +0000 | [diff] [blame] | 1895 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - |
| 1896 | idev->cnf.max_desync_factor * HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1897 | if (time_before(expires, jiffies)) { |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 1898 | pr_warn("%s: too short regeneration interval; timer disabled for %s\n", |
| 1899 | __func__, idev->dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1900 | goto out; |
| 1901 | } |
| 1902 | |
| 1903 | if (!mod_timer(&idev->regen_timer, expires)) |
| 1904 | in6_dev_hold(idev); |
| 1905 | |
| 1906 | out: |
| 1907 | write_unlock_bh(&idev->lock); |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1908 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1909 | in6_dev_put(idev); |
| 1910 | } |
| 1911 | |
Sorin Dumitru | eb7e057 | 2012-08-30 02:01:45 +0000 | [diff] [blame] | 1912 | 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] | 1913 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1914 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) |
Sorin Dumitru | eb7e057 | 2012-08-30 02:01:45 +0000 | [diff] [blame] | 1915 | __ipv6_regen_rndid(idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1916 | } |
| 1917 | #endif |
| 1918 | |
| 1919 | /* |
| 1920 | * Add prefix route. |
| 1921 | */ |
| 1922 | |
| 1923 | static void |
| 1924 | 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] | 1925 | unsigned long expires, u32 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1926 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1927 | struct fib6_config cfg = { |
| 1928 | .fc_table = RT6_TABLE_PREFIX, |
| 1929 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
| 1930 | .fc_ifindex = dev->ifindex, |
| 1931 | .fc_expires = expires, |
| 1932 | .fc_dst_len = plen, |
| 1933 | .fc_flags = RTF_UP | flags, |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1934 | .fc_nlinfo.nl_net = dev_net(dev), |
Stephen Hemminger | f410a1f | 2008-08-23 05:16:46 -0700 | [diff] [blame] | 1935 | .fc_protocol = RTPROT_KERNEL, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1936 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1937 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1938 | cfg.fc_dst = *pfx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1939 | |
| 1940 | /* Prevent useless cloning on PtP SIT. |
| 1941 | This thing is done here expecting that the whole |
| 1942 | class of non-broadcast devices need not cloning. |
| 1943 | */ |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 1944 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1945 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
| 1946 | cfg.fc_flags |= RTF_NONEXTHOP; |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 1947 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1948 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1949 | ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1950 | } |
| 1951 | |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 1952 | |
| 1953 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, |
| 1954 | int plen, |
| 1955 | const struct net_device *dev, |
| 1956 | u32 flags, u32 noflags) |
| 1957 | { |
| 1958 | struct fib6_node *fn; |
| 1959 | struct rt6_info *rt = NULL; |
| 1960 | struct fib6_table *table; |
| 1961 | |
| 1962 | table = fib6_get_table(dev_net(dev), RT6_TABLE_PREFIX); |
| 1963 | if (table == NULL) |
| 1964 | return NULL; |
| 1965 | |
Li RongQing | 5744dd9 | 2012-09-11 21:59:01 +0000 | [diff] [blame] | 1966 | read_lock_bh(&table->tb6_lock); |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 1967 | fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0); |
| 1968 | if (!fn) |
| 1969 | goto out; |
| 1970 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 1971 | if (rt->dst.dev->ifindex != dev->ifindex) |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 1972 | continue; |
| 1973 | if ((rt->rt6i_flags & flags) != flags) |
| 1974 | continue; |
Romain Kuntz | 85da53b | 2013-01-09 15:02:26 +0100 | [diff] [blame] | 1975 | if ((rt->rt6i_flags & noflags) != 0) |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 1976 | continue; |
| 1977 | dst_hold(&rt->dst); |
| 1978 | break; |
| 1979 | } |
| 1980 | out: |
Li RongQing | 5744dd9 | 2012-09-11 21:59:01 +0000 | [diff] [blame] | 1981 | read_unlock_bh(&table->tb6_lock); |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 1982 | return rt; |
| 1983 | } |
| 1984 | |
| 1985 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1986 | /* Create "default" multicast route to the interface */ |
| 1987 | |
| 1988 | static void addrconf_add_mroute(struct net_device *dev) |
| 1989 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1990 | struct fib6_config cfg = { |
| 1991 | .fc_table = RT6_TABLE_LOCAL, |
| 1992 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
| 1993 | .fc_ifindex = dev->ifindex, |
| 1994 | .fc_dst_len = 8, |
| 1995 | .fc_flags = RTF_UP, |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1996 | .fc_nlinfo.nl_net = dev_net(dev), |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1997 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1998 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1999 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); |
| 2000 | |
| 2001 | ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2002 | } |
| 2003 | |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 2004 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2005 | static void sit_route_add(struct net_device *dev) |
| 2006 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2007 | struct fib6_config cfg = { |
| 2008 | .fc_table = RT6_TABLE_MAIN, |
| 2009 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
| 2010 | .fc_ifindex = dev->ifindex, |
| 2011 | .fc_dst_len = 96, |
| 2012 | .fc_flags = RTF_UP | RTF_NONEXTHOP, |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2013 | .fc_nlinfo.nl_net = dev_net(dev), |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2014 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2015 | |
| 2016 | /* prefix length - 96 bits "::d.d.d.d" */ |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 2017 | ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2018 | } |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2019 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2020 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2021 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) |
| 2022 | { |
| 2023 | struct inet6_dev *idev; |
| 2024 | |
| 2025 | ASSERT_RTNL(); |
| 2026 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 2027 | idev = ipv6_find_idev(dev); |
| 2028 | if (!idev) |
Brian Haley | 64e724f | 2010-07-20 10:34:30 +0000 | [diff] [blame] | 2029 | return ERR_PTR(-ENOBUFS); |
| 2030 | |
| 2031 | if (idev->cnf.disable_ipv6) |
| 2032 | return ERR_PTR(-EACCES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2033 | |
| 2034 | /* Add default multicast route */ |
Li Wei | 4af04ab | 2011-12-06 21:23:45 +0000 | [diff] [blame] | 2035 | if (!(dev->flags & IFF_LOOPBACK)) |
| 2036 | addrconf_add_mroute(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2037 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2038 | return idev; |
| 2039 | } |
| 2040 | |
Neil Horman | e6bff99 | 2012-01-04 10:49:15 +0000 | [diff] [blame] | 2041 | 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] | 2042 | { |
| 2043 | struct prefix_info *pinfo; |
| 2044 | __u32 valid_lft; |
| 2045 | __u32 prefered_lft; |
| 2046 | int addr_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2047 | struct inet6_dev *in6_dev; |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 2048 | struct net *net = dev_net(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2049 | |
| 2050 | pinfo = (struct prefix_info *) opt; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2051 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2052 | if (len < sizeof(struct prefix_info)) { |
| 2053 | ADBG(("addrconf: prefix option too short\n")); |
| 2054 | return; |
| 2055 | } |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2056 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2057 | /* |
| 2058 | * Validation checks ([ADDRCONF], page 19) |
| 2059 | */ |
| 2060 | |
| 2061 | addr_type = ipv6_addr_type(&pinfo->prefix); |
| 2062 | |
| 2063 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) |
| 2064 | return; |
| 2065 | |
| 2066 | valid_lft = ntohl(pinfo->valid); |
| 2067 | prefered_lft = ntohl(pinfo->prefered); |
| 2068 | |
| 2069 | if (prefered_lft > valid_lft) { |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 2070 | net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2071 | return; |
| 2072 | } |
| 2073 | |
| 2074 | in6_dev = in6_dev_get(dev); |
| 2075 | |
| 2076 | if (in6_dev == NULL) { |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 2077 | net_dbg_ratelimited("addrconf: device %s not configured\n", |
| 2078 | dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2079 | return; |
| 2080 | } |
| 2081 | |
| 2082 | /* |
| 2083 | * Two things going on here: |
| 2084 | * 1) Add routes for on-link prefixes |
| 2085 | * 2) Configure prefixes with the auto flag set |
| 2086 | */ |
| 2087 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2088 | if (pinfo->onlink) { |
| 2089 | struct rt6_info *rt; |
| 2090 | unsigned long rt_expires; |
| 2091 | |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2092 | /* Avoid arithmetic overflow. Really, we could |
| 2093 | * save rt_expires in seconds, likely valid_lft, |
| 2094 | * but it would require division in fib gc, that it |
| 2095 | * not good. |
| 2096 | */ |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2097 | if (HZ > USER_HZ) |
| 2098 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); |
| 2099 | else |
| 2100 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); |
YOSHIFUJI Hideaki | 3dd4bc6 | 2005-12-19 14:02:45 -0800 | [diff] [blame] | 2101 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2102 | if (addrconf_finite_timeout(rt_expires)) |
| 2103 | rt_expires *= HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2104 | |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 2105 | rt = addrconf_get_prefix_route(&pinfo->prefix, |
| 2106 | pinfo->prefix_len, |
| 2107 | dev, |
| 2108 | RTF_ADDRCONF | RTF_PREFIX_RT, |
| 2109 | RTF_GATEWAY | RTF_DEFAULT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2110 | |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 2111 | if (rt) { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2112 | /* Autoconf prefix route */ |
| 2113 | if (valid_lft == 0) { |
| 2114 | ip6_del_rt(rt); |
| 2115 | rt = NULL; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2116 | } else if (addrconf_finite_timeout(rt_expires)) { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2117 | /* not infinity */ |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 2118 | rt6_set_expires(rt, jiffies + rt_expires); |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2119 | } else { |
Gao feng | 1716a96 | 2012-04-06 00:13:10 +0000 | [diff] [blame] | 2120 | rt6_clean_expires(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2121 | } |
| 2122 | } else if (valid_lft) { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2123 | clock_t expires = 0; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2124 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
| 2125 | if (addrconf_finite_timeout(rt_expires)) { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2126 | /* not infinity */ |
| 2127 | flags |= RTF_EXPIRES; |
| 2128 | expires = jiffies_to_clock_t(rt_expires); |
| 2129 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2130 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2131 | dev, expires, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2132 | } |
Amerigo Wang | 94e187c | 2012-10-29 00:13:19 +0000 | [diff] [blame] | 2133 | ip6_rt_put(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2134 | } |
| 2135 | |
| 2136 | /* Try to figure out our local address for this prefix */ |
| 2137 | |
| 2138 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { |
Eldad Zack | 8e5e8f3 | 2012-04-01 07:49:08 +0000 | [diff] [blame] | 2139 | struct inet6_ifaddr *ifp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2140 | struct in6_addr addr; |
| 2141 | int create = 0, update_lft = 0; |
Daniel Borkmann | 617fe29 | 2013-04-09 03:47:16 +0000 | [diff] [blame] | 2142 | bool tokenized = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2143 | |
| 2144 | if (pinfo->prefix_len == 64) { |
| 2145 | memcpy(&addr, &pinfo->prefix, 8); |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 2146 | |
| 2147 | if (!ipv6_addr_any(&in6_dev->token)) { |
| 2148 | read_lock_bh(&in6_dev->lock); |
| 2149 | memcpy(addr.s6_addr + 8, |
| 2150 | in6_dev->token.s6_addr + 8, 8); |
| 2151 | read_unlock_bh(&in6_dev->lock); |
Daniel Borkmann | 617fe29 | 2013-04-09 03:47:16 +0000 | [diff] [blame] | 2152 | tokenized = true; |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 2153 | } else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && |
| 2154 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2155 | in6_dev_put(in6_dev); |
| 2156 | return; |
| 2157 | } |
| 2158 | goto ok; |
| 2159 | } |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 2160 | net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n", |
| 2161 | pinfo->prefix_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2162 | in6_dev_put(in6_dev); |
| 2163 | return; |
| 2164 | |
| 2165 | ok: |
| 2166 | |
YOSHIFUJI Hideaki | 53b7997 | 2008-07-19 22:35:03 -0700 | [diff] [blame] | 2167 | ifp = ipv6_get_ifaddr(net, &addr, dev, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2168 | |
| 2169 | if (ifp == NULL && valid_lft) { |
| 2170 | int max_addresses = in6_dev->cnf.max_addresses; |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2171 | u32 addr_flags = 0; |
| 2172 | |
| 2173 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 2174 | if (in6_dev->cnf.optimistic_dad && |
Neil Horman | e6bff99 | 2012-01-04 10:49:15 +0000 | [diff] [blame] | 2175 | !net->ipv6.devconf_all->forwarding && sllao) |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2176 | addr_flags = IFA_F_OPTIMISTIC; |
| 2177 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2178 | |
| 2179 | /* Do not allow to create too much of autoconfigured |
| 2180 | * addresses; this would be too easy way to crash kernel. |
| 2181 | */ |
| 2182 | if (!max_addresses || |
| 2183 | ipv6_count_addresses(in6_dev) < max_addresses) |
Jiri Pirko | 3f8f529 | 2013-08-01 10:41:27 +0200 | [diff] [blame] | 2184 | ifp = ipv6_add_addr(in6_dev, &addr, NULL, |
| 2185 | pinfo->prefix_len, |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2186 | addr_type&IPV6_ADDR_SCOPE_MASK, |
Jiri Benc | 8a226b2 | 2013-08-01 10:41:28 +0200 | [diff] [blame] | 2187 | addr_flags, valid_lft, |
| 2188 | prefered_lft); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2189 | |
YOSHIFUJI Hideaki / 吉藤英明 | 3f0d2ba | 2013-01-22 06:32:54 +0000 | [diff] [blame] | 2190 | if (IS_ERR_OR_NULL(ifp)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2191 | in6_dev_put(in6_dev); |
| 2192 | return; |
| 2193 | } |
| 2194 | |
Jiri Benc | 8a226b2 | 2013-08-01 10:41:28 +0200 | [diff] [blame] | 2195 | update_lft = 0; |
| 2196 | create = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2197 | ifp->cstamp = jiffies; |
Daniel Borkmann | 617fe29 | 2013-04-09 03:47:16 +0000 | [diff] [blame] | 2198 | ifp->tokenized = tokenized; |
David S. Miller | cf22f9a | 2012-04-14 21:37:40 -0400 | [diff] [blame] | 2199 | addrconf_dad_start(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2200 | } |
| 2201 | |
| 2202 | if (ifp) { |
| 2203 | int flags; |
| 2204 | unsigned long now; |
| 2205 | #ifdef CONFIG_IPV6_PRIVACY |
| 2206 | struct inet6_ifaddr *ift; |
| 2207 | #endif |
| 2208 | u32 stored_lft; |
| 2209 | |
| 2210 | /* update lifetime (RFC2462 5.5.3 e) */ |
| 2211 | spin_lock(&ifp->lock); |
| 2212 | now = jiffies; |
| 2213 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) |
| 2214 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; |
| 2215 | else |
| 2216 | stored_lft = 0; |
Jiri Benc | 8a226b2 | 2013-08-01 10:41:28 +0200 | [diff] [blame] | 2217 | if (!update_lft && !create && stored_lft) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2218 | if (valid_lft > MIN_VALID_LIFETIME || |
| 2219 | valid_lft > stored_lft) |
| 2220 | update_lft = 1; |
| 2221 | else if (stored_lft <= MIN_VALID_LIFETIME) { |
| 2222 | /* valid_lft <= stored_lft is always true */ |
Brian Haley | a1ed052 | 2009-07-02 07:10:52 +0000 | [diff] [blame] | 2223 | /* |
| 2224 | * RFC 4862 Section 5.5.3e: |
| 2225 | * "Note that the preferred lifetime of |
| 2226 | * the corresponding address is always |
| 2227 | * reset to the Preferred Lifetime in |
| 2228 | * the received Prefix Information |
| 2229 | * option, regardless of whether the |
| 2230 | * valid lifetime is also reset or |
| 2231 | * ignored." |
| 2232 | * |
| 2233 | * So if the preferred lifetime in |
| 2234 | * this advertisement is different |
| 2235 | * than what we have stored, but the |
| 2236 | * valid lifetime is invalid, just |
| 2237 | * reset prefered_lft. |
| 2238 | * |
| 2239 | * We must set the valid lifetime |
| 2240 | * to the stored lifetime since we'll |
| 2241 | * be updating the timestamp below, |
| 2242 | * else we'll set it back to the |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 2243 | * minimum. |
Brian Haley | a1ed052 | 2009-07-02 07:10:52 +0000 | [diff] [blame] | 2244 | */ |
| 2245 | if (prefered_lft != ifp->prefered_lft) { |
| 2246 | valid_lft = stored_lft; |
| 2247 | update_lft = 1; |
| 2248 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2249 | } else { |
| 2250 | valid_lft = MIN_VALID_LIFETIME; |
| 2251 | if (valid_lft < prefered_lft) |
| 2252 | prefered_lft = valid_lft; |
| 2253 | update_lft = 1; |
| 2254 | } |
| 2255 | } |
| 2256 | |
| 2257 | if (update_lft) { |
| 2258 | ifp->valid_lft = valid_lft; |
| 2259 | ifp->prefered_lft = prefered_lft; |
| 2260 | ifp->tstamp = now; |
| 2261 | flags = ifp->flags; |
| 2262 | ifp->flags &= ~IFA_F_DEPRECATED; |
| 2263 | spin_unlock(&ifp->lock); |
| 2264 | |
| 2265 | if (!(flags&IFA_F_TENTATIVE)) |
| 2266 | ipv6_ifa_notify(0, ifp); |
| 2267 | } else |
| 2268 | spin_unlock(&ifp->lock); |
| 2269 | |
| 2270 | #ifdef CONFIG_IPV6_PRIVACY |
| 2271 | read_lock_bh(&in6_dev->lock); |
| 2272 | /* update all temporary addresses in the list */ |
Lorenzo Colitti | 76f793e | 2011-07-26 13:50:49 +0000 | [diff] [blame] | 2273 | list_for_each_entry(ift, &in6_dev->tempaddr_list, |
| 2274 | tmp_list) { |
| 2275 | int age, max_valid, max_prefered; |
| 2276 | |
Benoit Boissinot | c6fbfac | 2008-04-02 00:00:58 -0700 | [diff] [blame] | 2277 | if (ifp != ift->ifpub) |
| 2278 | continue; |
| 2279 | |
Lorenzo Colitti | 76f793e | 2011-07-26 13:50:49 +0000 | [diff] [blame] | 2280 | /* |
| 2281 | * RFC 4941 section 3.3: |
| 2282 | * If a received option will extend the lifetime |
| 2283 | * of a public address, the lifetimes of |
| 2284 | * temporary addresses should be extended, |
| 2285 | * subject to the overall constraint that no |
| 2286 | * temporary addresses should ever remain |
| 2287 | * "valid" or "preferred" for a time longer than |
| 2288 | * (TEMP_VALID_LIFETIME) or |
| 2289 | * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), |
| 2290 | * respectively. |
| 2291 | */ |
| 2292 | age = (now - ift->cstamp) / HZ; |
| 2293 | max_valid = in6_dev->cnf.temp_valid_lft - age; |
| 2294 | if (max_valid < 0) |
| 2295 | max_valid = 0; |
| 2296 | |
| 2297 | max_prefered = in6_dev->cnf.temp_prefered_lft - |
| 2298 | in6_dev->cnf.max_desync_factor - |
| 2299 | age; |
| 2300 | if (max_prefered < 0) |
| 2301 | max_prefered = 0; |
| 2302 | |
| 2303 | if (valid_lft > max_valid) |
| 2304 | valid_lft = max_valid; |
| 2305 | |
| 2306 | if (prefered_lft > max_prefered) |
| 2307 | prefered_lft = max_prefered; |
| 2308 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2309 | spin_lock(&ift->lock); |
| 2310 | flags = ift->flags; |
Lorenzo Colitti | 76f793e | 2011-07-26 13:50:49 +0000 | [diff] [blame] | 2311 | ift->valid_lft = valid_lft; |
| 2312 | ift->prefered_lft = prefered_lft; |
| 2313 | ift->tstamp = now; |
| 2314 | if (prefered_lft > 0) |
| 2315 | ift->flags &= ~IFA_F_DEPRECATED; |
| 2316 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2317 | spin_unlock(&ift->lock); |
| 2318 | if (!(flags&IFA_F_TENTATIVE)) |
| 2319 | ipv6_ifa_notify(0, ift); |
| 2320 | } |
| 2321 | |
Glenn Wurster | aed6550 | 2010-09-27 07:04:30 +0000 | [diff] [blame] | 2322 | if ((create || list_empty(&in6_dev->tempaddr_list)) && in6_dev->cnf.use_tempaddr > 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2323 | /* |
Lorenzo Colitti | 76f793e | 2011-07-26 13:50:49 +0000 | [diff] [blame] | 2324 | * When a new public address is created as |
| 2325 | * described in [ADDRCONF], also create a new |
| 2326 | * temporary address. Also create a temporary |
| 2327 | * address if it's enabled but no temporary |
| 2328 | * address currently exists. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2329 | */ |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2330 | read_unlock_bh(&in6_dev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2331 | ipv6_create_tempaddr(ifp, NULL); |
| 2332 | } else { |
| 2333 | read_unlock_bh(&in6_dev->lock); |
| 2334 | } |
| 2335 | #endif |
| 2336 | in6_ifa_put(ifp); |
| 2337 | addrconf_verify(0); |
| 2338 | } |
| 2339 | } |
| 2340 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); |
| 2341 | in6_dev_put(in6_dev); |
| 2342 | } |
| 2343 | |
| 2344 | /* |
| 2345 | * Set destination address. |
| 2346 | * Special case for SIT interfaces where we create a new "virtual" |
| 2347 | * device. |
| 2348 | */ |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2349 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2350 | { |
| 2351 | struct in6_ifreq ireq; |
| 2352 | struct net_device *dev; |
| 2353 | int err = -EINVAL; |
| 2354 | |
| 2355 | rtnl_lock(); |
| 2356 | |
| 2357 | err = -EFAULT; |
| 2358 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
| 2359 | goto err_exit; |
| 2360 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2361 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2362 | |
| 2363 | err = -ENODEV; |
| 2364 | if (dev == NULL) |
| 2365 | goto err_exit; |
| 2366 | |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 2367 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2368 | if (dev->type == ARPHRD_SIT) { |
Stephen Hemminger | 5bc3eb7 | 2008-11-19 21:52:05 -0800 | [diff] [blame] | 2369 | const struct net_device_ops *ops = dev->netdev_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2370 | struct ifreq ifr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2371 | struct ip_tunnel_parm p; |
| 2372 | |
| 2373 | err = -EADDRNOTAVAIL; |
| 2374 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) |
| 2375 | goto err_exit; |
| 2376 | |
| 2377 | memset(&p, 0, sizeof(p)); |
| 2378 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; |
| 2379 | p.iph.saddr = 0; |
| 2380 | p.iph.version = 4; |
| 2381 | p.iph.ihl = 5; |
| 2382 | p.iph.protocol = IPPROTO_IPV6; |
| 2383 | p.iph.ttl = 64; |
Stephen Hemminger | d20b310 | 2008-01-21 00:48:43 -0800 | [diff] [blame] | 2384 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2385 | |
Stephen Hemminger | 5bc3eb7 | 2008-11-19 21:52:05 -0800 | [diff] [blame] | 2386 | if (ops->ndo_do_ioctl) { |
| 2387 | mm_segment_t oldfs = get_fs(); |
| 2388 | |
| 2389 | set_fs(KERNEL_DS); |
| 2390 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); |
| 2391 | set_fs(oldfs); |
| 2392 | } else |
| 2393 | err = -EOPNOTSUPP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2394 | |
| 2395 | if (err == 0) { |
| 2396 | err = -ENOBUFS; |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2397 | dev = __dev_get_by_name(net, p.name); |
| 2398 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2399 | goto err_exit; |
| 2400 | err = dev_open(dev); |
| 2401 | } |
| 2402 | } |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2403 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2404 | |
| 2405 | err_exit: |
| 2406 | rtnl_unlock(); |
| 2407 | return err; |
| 2408 | } |
| 2409 | |
| 2410 | /* |
| 2411 | * Manual configuration of address on an interface |
| 2412 | */ |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 2413 | static int inet6_addr_add(struct net *net, int ifindex, const struct in6_addr *pfx, |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 2414 | const struct in6_addr *peer_pfx, |
Thomas Graf | 24ef0da | 2008-05-28 16:54:22 +0200 | [diff] [blame] | 2415 | unsigned int plen, __u8 ifa_flags, __u32 prefered_lft, |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2416 | __u32 valid_lft) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2417 | { |
| 2418 | struct inet6_ifaddr *ifp; |
| 2419 | struct inet6_dev *idev; |
| 2420 | struct net_device *dev; |
| 2421 | int scope; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2422 | u32 flags; |
| 2423 | clock_t expires; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2424 | unsigned long timeout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2425 | |
| 2426 | ASSERT_RTNL(); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2427 | |
Thomas Graf | 24ef0da | 2008-05-28 16:54:22 +0200 | [diff] [blame] | 2428 | if (plen > 128) |
| 2429 | return -EINVAL; |
| 2430 | |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2431 | /* check the lifetime */ |
| 2432 | if (!valid_lft || prefered_lft > valid_lft) |
| 2433 | return -EINVAL; |
| 2434 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2435 | dev = __dev_get_by_index(net, ifindex); |
| 2436 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2437 | return -ENODEV; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2438 | |
Brian Haley | 64e724f | 2010-07-20 10:34:30 +0000 | [diff] [blame] | 2439 | idev = addrconf_add_dev(dev); |
| 2440 | if (IS_ERR(idev)) |
| 2441 | return PTR_ERR(idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2442 | |
| 2443 | scope = ipv6_addr_scope(pfx); |
| 2444 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2445 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
| 2446 | if (addrconf_finite_timeout(timeout)) { |
| 2447 | expires = jiffies_to_clock_t(timeout * HZ); |
| 2448 | valid_lft = timeout; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2449 | flags = RTF_EXPIRES; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2450 | } else { |
| 2451 | expires = 0; |
| 2452 | flags = 0; |
| 2453 | ifa_flags |= IFA_F_PERMANENT; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2454 | } |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2455 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2456 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
| 2457 | if (addrconf_finite_timeout(timeout)) { |
| 2458 | if (timeout == 0) |
| 2459 | ifa_flags |= IFA_F_DEPRECATED; |
| 2460 | prefered_lft = timeout; |
| 2461 | } |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2462 | |
Jiri Benc | 8a226b2 | 2013-08-01 10:41:28 +0200 | [diff] [blame] | 2463 | ifp = ipv6_add_addr(idev, pfx, peer_pfx, plen, scope, ifa_flags, |
| 2464 | valid_lft, prefered_lft); |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2465 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2466 | if (!IS_ERR(ifp)) { |
YOSHIFUJI Hideaki | 46d4804 | 2007-02-07 20:36:26 +0900 | [diff] [blame] | 2467 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2468 | expires, flags); |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2469 | /* |
| 2470 | * Note that section 3.1 of RFC 4429 indicates |
| 2471 | * that the Optimistic flag should not be set for |
| 2472 | * manually configured addresses |
| 2473 | */ |
David S. Miller | cf22f9a | 2012-04-14 21:37:40 -0400 | [diff] [blame] | 2474 | addrconf_dad_start(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2475 | in6_ifa_put(ifp); |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2476 | addrconf_verify(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2477 | return 0; |
| 2478 | } |
| 2479 | |
| 2480 | return PTR_ERR(ifp); |
| 2481 | } |
| 2482 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 2483 | static int inet6_addr_del(struct net *net, int ifindex, const struct in6_addr *pfx, |
Thomas Graf | 24ef0da | 2008-05-28 16:54:22 +0200 | [diff] [blame] | 2484 | unsigned int plen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2485 | { |
| 2486 | struct inet6_ifaddr *ifp; |
| 2487 | struct inet6_dev *idev; |
| 2488 | struct net_device *dev; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2489 | |
Thomas Graf | 24ef0da | 2008-05-28 16:54:22 +0200 | [diff] [blame] | 2490 | if (plen > 128) |
| 2491 | return -EINVAL; |
| 2492 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2493 | dev = __dev_get_by_index(net, ifindex); |
| 2494 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2495 | return -ENODEV; |
| 2496 | |
| 2497 | if ((idev = __in6_dev_get(dev)) == NULL) |
| 2498 | return -ENXIO; |
| 2499 | |
| 2500 | read_lock_bh(&idev->lock); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 2501 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2502 | if (ifp->prefix_len == plen && |
| 2503 | ipv6_addr_equal(pfx, &ifp->addr)) { |
| 2504 | in6_ifa_hold(ifp); |
| 2505 | read_unlock_bh(&idev->lock); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2506 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2507 | ipv6_del_addr(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2508 | return 0; |
| 2509 | } |
| 2510 | } |
| 2511 | read_unlock_bh(&idev->lock); |
| 2512 | return -EADDRNOTAVAIL; |
| 2513 | } |
| 2514 | |
| 2515 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2516 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2517 | { |
| 2518 | struct in6_ifreq ireq; |
| 2519 | int err; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2520 | |
Eric W. Biederman | af31f41 | 2012-11-16 03:03:06 +0000 | [diff] [blame] | 2521 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2522 | return -EPERM; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2523 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2524 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
| 2525 | return -EFAULT; |
| 2526 | |
| 2527 | rtnl_lock(); |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 2528 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, NULL, |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2529 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, |
| 2530 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2531 | rtnl_unlock(); |
| 2532 | return err; |
| 2533 | } |
| 2534 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2535 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2536 | { |
| 2537 | struct in6_ifreq ireq; |
| 2538 | int err; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2539 | |
Eric W. Biederman | af31f41 | 2012-11-16 03:03:06 +0000 | [diff] [blame] | 2540 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2541 | return -EPERM; |
| 2542 | |
| 2543 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
| 2544 | return -EFAULT; |
| 2545 | |
| 2546 | rtnl_lock(); |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2547 | err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
| 2548 | ireq.ifr6_prefixlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2549 | rtnl_unlock(); |
| 2550 | return err; |
| 2551 | } |
| 2552 | |
Ilpo Järvinen | b5f348e | 2009-02-06 23:48:01 -0800 | [diff] [blame] | 2553 | static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
| 2554 | int plen, int scope) |
| 2555 | { |
| 2556 | struct inet6_ifaddr *ifp; |
| 2557 | |
Jiri Benc | 8a226b2 | 2013-08-01 10:41:28 +0200 | [diff] [blame] | 2558 | ifp = ipv6_add_addr(idev, addr, NULL, plen, |
| 2559 | scope, IFA_F_PERMANENT, 0, 0); |
Ilpo Järvinen | b5f348e | 2009-02-06 23:48:01 -0800 | [diff] [blame] | 2560 | if (!IS_ERR(ifp)) { |
| 2561 | spin_lock_bh(&ifp->lock); |
| 2562 | ifp->flags &= ~IFA_F_TENTATIVE; |
| 2563 | spin_unlock_bh(&ifp->lock); |
| 2564 | ipv6_ifa_notify(RTM_NEWADDR, ifp); |
| 2565 | in6_ifa_put(ifp); |
| 2566 | } |
| 2567 | } |
| 2568 | |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 2569 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2570 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
| 2571 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2572 | struct in6_addr addr; |
| 2573 | struct net_device *dev; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2574 | struct net *net = dev_net(idev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2575 | int scope; |
| 2576 | |
| 2577 | ASSERT_RTNL(); |
| 2578 | |
| 2579 | memset(&addr, 0, sizeof(struct in6_addr)); |
| 2580 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); |
| 2581 | |
| 2582 | if (idev->dev->flags&IFF_POINTOPOINT) { |
| 2583 | addr.s6_addr32[0] = htonl(0xfe800000); |
| 2584 | scope = IFA_LINK; |
| 2585 | } else { |
| 2586 | scope = IPV6_ADDR_COMPATv4; |
| 2587 | } |
| 2588 | |
| 2589 | if (addr.s6_addr32[3]) { |
Ilpo Järvinen | b5f348e | 2009-02-06 23:48:01 -0800 | [diff] [blame] | 2590 | add_addr(idev, &addr, 128, scope); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2591 | return; |
| 2592 | } |
| 2593 | |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 2594 | for_each_netdev(net, dev) { |
Eldad Zack | 8e5e8f3 | 2012-04-01 07:49:08 +0000 | [diff] [blame] | 2595 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2596 | if (in_dev && (dev->flags & IFF_UP)) { |
Eldad Zack | 8e5e8f3 | 2012-04-01 07:49:08 +0000 | [diff] [blame] | 2597 | struct in_ifaddr *ifa; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2598 | |
| 2599 | int flag = scope; |
| 2600 | |
| 2601 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { |
| 2602 | int plen; |
| 2603 | |
| 2604 | addr.s6_addr32[3] = ifa->ifa_local; |
| 2605 | |
| 2606 | if (ifa->ifa_scope == RT_SCOPE_LINK) |
| 2607 | continue; |
| 2608 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { |
| 2609 | if (idev->dev->flags&IFF_POINTOPOINT) |
| 2610 | continue; |
| 2611 | flag |= IFA_HOST; |
| 2612 | } |
| 2613 | if (idev->dev->flags&IFF_POINTOPOINT) |
| 2614 | plen = 64; |
| 2615 | else |
| 2616 | plen = 96; |
| 2617 | |
Ilpo Järvinen | b5f348e | 2009-02-06 23:48:01 -0800 | [diff] [blame] | 2618 | add_addr(idev, &addr, plen, flag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2619 | } |
| 2620 | } |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2621 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2622 | } |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2623 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2624 | |
| 2625 | static void init_loopback(struct net_device *dev) |
| 2626 | { |
| 2627 | struct inet6_dev *idev; |
Balakumaran Kannan | 25fb6ca4 | 2013-04-02 16:15:05 +0530 | [diff] [blame] | 2628 | struct net_device *sp_dev; |
| 2629 | struct inet6_ifaddr *sp_ifa; |
| 2630 | struct rt6_info *sp_rt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2631 | |
| 2632 | /* ::1 */ |
| 2633 | |
| 2634 | ASSERT_RTNL(); |
| 2635 | |
| 2636 | if ((idev = ipv6_find_idev(dev)) == NULL) { |
Joe Perches | 91df42b | 2012-05-15 14:11:54 +0000 | [diff] [blame] | 2637 | pr_debug("%s: add_dev failed\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2638 | return; |
| 2639 | } |
| 2640 | |
Ilpo Järvinen | b5f348e | 2009-02-06 23:48:01 -0800 | [diff] [blame] | 2641 | add_addr(idev, &in6addr_loopback, 128, IFA_HOST); |
Balakumaran Kannan | 25fb6ca4 | 2013-04-02 16:15:05 +0530 | [diff] [blame] | 2642 | |
| 2643 | /* Add routes to other interface's IPv6 addresses */ |
| 2644 | for_each_netdev(dev_net(dev), sp_dev) { |
| 2645 | if (!strcmp(sp_dev->name, dev->name)) |
| 2646 | continue; |
| 2647 | |
| 2648 | idev = __in6_dev_get(sp_dev); |
| 2649 | if (!idev) |
| 2650 | continue; |
| 2651 | |
| 2652 | read_lock_bh(&idev->lock); |
| 2653 | list_for_each_entry(sp_ifa, &idev->addr_list, if_list) { |
| 2654 | |
| 2655 | if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE)) |
| 2656 | continue; |
| 2657 | |
Gao feng | a881ae1 | 2013-06-16 11:14:30 +0800 | [diff] [blame] | 2658 | if (sp_ifa->rt) |
| 2659 | continue; |
| 2660 | |
Balakumaran Kannan | 25fb6ca4 | 2013-04-02 16:15:05 +0530 | [diff] [blame] | 2661 | sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, 0); |
| 2662 | |
| 2663 | /* Failure cases are ignored */ |
Gao feng | 534c877 | 2013-06-02 22:16:21 +0000 | [diff] [blame] | 2664 | if (!IS_ERR(sp_rt)) { |
| 2665 | sp_ifa->rt = sp_rt; |
Balakumaran Kannan | 25fb6ca4 | 2013-04-02 16:15:05 +0530 | [diff] [blame] | 2666 | ip6_ins_rt(sp_rt); |
Gao feng | 534c877 | 2013-06-02 22:16:21 +0000 | [diff] [blame] | 2667 | } |
Balakumaran Kannan | 25fb6ca4 | 2013-04-02 16:15:05 +0530 | [diff] [blame] | 2668 | } |
| 2669 | read_unlock_bh(&idev->lock); |
| 2670 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2671 | } |
| 2672 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 2673 | static void addrconf_add_linklocal(struct inet6_dev *idev, const struct in6_addr *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2674 | { |
Eldad Zack | 8e5e8f3 | 2012-04-01 07:49:08 +0000 | [diff] [blame] | 2675 | struct inet6_ifaddr *ifp; |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2676 | u32 addr_flags = IFA_F_PERMANENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2677 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2678 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 2679 | if (idev->cnf.optimistic_dad && |
David Miller | 702beb8 | 2008-07-20 18:17:02 -0700 | [diff] [blame] | 2680 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2681 | addr_flags |= IFA_F_OPTIMISTIC; |
| 2682 | #endif |
| 2683 | |
| 2684 | |
Jiri Benc | 8a226b2 | 2013-08-01 10:41:28 +0200 | [diff] [blame] | 2685 | ifp = ipv6_add_addr(idev, addr, NULL, 64, IFA_LINK, addr_flags, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2686 | if (!IS_ERR(ifp)) { |
YOSHIFUJI Hideaki | 46d4804 | 2007-02-07 20:36:26 +0900 | [diff] [blame] | 2687 | 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] | 2688 | addrconf_dad_start(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2689 | in6_ifa_put(ifp); |
| 2690 | } |
| 2691 | } |
| 2692 | |
| 2693 | static void addrconf_dev_config(struct net_device *dev) |
| 2694 | { |
| 2695 | struct in6_addr addr; |
Eldad Zack | 8e5e8f3 | 2012-04-01 07:49:08 +0000 | [diff] [blame] | 2696 | struct inet6_dev *idev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2697 | |
| 2698 | ASSERT_RTNL(); |
| 2699 | |
Herbert Xu | 74235a2 | 2007-06-14 13:02:55 -0700 | [diff] [blame] | 2700 | if ((dev->type != ARPHRD_ETHER) && |
| 2701 | (dev->type != ARPHRD_FDDI) && |
Herbert Xu | 74235a2 | 2007-06-14 13:02:55 -0700 | [diff] [blame] | 2702 | (dev->type != ARPHRD_ARCNET) && |
alex.bluesman.smirnov@gmail.com | 06a4c1c | 2012-05-10 03:25:52 +0000 | [diff] [blame] | 2703 | (dev->type != ARPHRD_INFINIBAND) && |
YOSHIFUJI Hideaki / 吉藤英明 | cb6bf35 | 2013-03-25 08:26:24 +0000 | [diff] [blame] | 2704 | (dev->type != ARPHRD_IEEE802154) && |
| 2705 | (dev->type != ARPHRD_IEEE1394)) { |
Herbert Xu | 74235a2 | 2007-06-14 13:02:55 -0700 | [diff] [blame] | 2706 | /* Alas, we support only Ethernet autoconfiguration. */ |
| 2707 | return; |
| 2708 | } |
| 2709 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2710 | idev = addrconf_add_dev(dev); |
Brian Haley | 64e724f | 2010-07-20 10:34:30 +0000 | [diff] [blame] | 2711 | if (IS_ERR(idev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2712 | return; |
| 2713 | |
| 2714 | memset(&addr, 0, sizeof(struct in6_addr)); |
| 2715 | addr.s6_addr32[0] = htonl(0xFE800000); |
| 2716 | |
| 2717 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) |
| 2718 | addrconf_add_linklocal(idev, &addr); |
| 2719 | } |
| 2720 | |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 2721 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2722 | static void addrconf_sit_config(struct net_device *dev) |
| 2723 | { |
| 2724 | struct inet6_dev *idev; |
| 2725 | |
| 2726 | ASSERT_RTNL(); |
| 2727 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2728 | /* |
| 2729 | * Configure the tunnel with one of our IPv4 |
| 2730 | * addresses... we should configure all of |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2731 | * our v4 addrs in the tunnel |
| 2732 | */ |
| 2733 | |
| 2734 | if ((idev = ipv6_find_idev(dev)) == NULL) { |
Joe Perches | 91df42b | 2012-05-15 14:11:54 +0000 | [diff] [blame] | 2735 | pr_debug("%s: add_dev failed\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2736 | return; |
| 2737 | } |
| 2738 | |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 2739 | if (dev->priv_flags & IFF_ISATAP) { |
| 2740 | struct in6_addr addr; |
| 2741 | |
| 2742 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); |
| 2743 | addrconf_prefix_route(&addr, 64, dev, 0, 0); |
| 2744 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) |
| 2745 | addrconf_add_linklocal(idev, &addr); |
| 2746 | return; |
| 2747 | } |
| 2748 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2749 | sit_add_v4_addrs(idev); |
| 2750 | |
Nicolas Dichtel | 62b54dd | 2012-10-01 23:19:14 +0000 | [diff] [blame] | 2751 | if (dev->flags&IFF_POINTOPOINT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2752 | addrconf_add_mroute(dev); |
Nicolas Dichtel | 62b54dd | 2012-10-01 23:19:14 +0000 | [diff] [blame] | 2753 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2754 | sit_route_add(dev); |
| 2755 | } |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2756 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2757 | |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 2758 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
stephen hemminger | aee80b5 | 2011-06-08 10:44:30 +0000 | [diff] [blame] | 2759 | static void addrconf_gre_config(struct net_device *dev) |
| 2760 | { |
| 2761 | struct inet6_dev *idev; |
| 2762 | struct in6_addr addr; |
| 2763 | |
stephen hemminger | aee80b5 | 2011-06-08 10:44:30 +0000 | [diff] [blame] | 2764 | ASSERT_RTNL(); |
| 2765 | |
| 2766 | if ((idev = ipv6_find_idev(dev)) == NULL) { |
Joe Perches | 91df42b | 2012-05-15 14:11:54 +0000 | [diff] [blame] | 2767 | pr_debug("%s: add_dev failed\n", __func__); |
stephen hemminger | aee80b5 | 2011-06-08 10:44:30 +0000 | [diff] [blame] | 2768 | return; |
| 2769 | } |
| 2770 | |
| 2771 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); |
| 2772 | addrconf_prefix_route(&addr, 64, dev, 0, 0); |
| 2773 | |
| 2774 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) |
| 2775 | addrconf_add_linklocal(idev, &addr); |
| 2776 | } |
| 2777 | #endif |
| 2778 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2779 | static inline int |
| 2780 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) |
| 2781 | { |
| 2782 | struct in6_addr lladdr; |
| 2783 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2784 | if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2785 | addrconf_add_linklocal(idev, &lladdr); |
| 2786 | return 0; |
| 2787 | } |
| 2788 | return -1; |
| 2789 | } |
| 2790 | |
| 2791 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) |
| 2792 | { |
| 2793 | struct net_device *link_dev; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2794 | struct net *net = dev_net(idev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2795 | |
| 2796 | /* first try to inherit the link-local address from the link device */ |
| 2797 | if (idev->dev->iflink && |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 2798 | (link_dev = __dev_get_by_index(net, idev->dev->iflink))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2799 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
| 2800 | return; |
| 2801 | } |
| 2802 | /* then try to inherit it from any device */ |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 2803 | for_each_netdev(net, link_dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2804 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
| 2805 | return; |
| 2806 | } |
Joe Perches | 91df42b | 2012-05-15 14:11:54 +0000 | [diff] [blame] | 2807 | pr_debug("init ip6-ip6: add_linklocal failed\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2808 | } |
| 2809 | |
| 2810 | /* |
| 2811 | * Autoconfigure tunnel with a link-local address so routing protocols, |
| 2812 | * DHCPv6, MLD etc. can be run over the virtual link |
| 2813 | */ |
| 2814 | |
| 2815 | static void addrconf_ip6_tnl_config(struct net_device *dev) |
| 2816 | { |
| 2817 | struct inet6_dev *idev; |
| 2818 | |
| 2819 | ASSERT_RTNL(); |
| 2820 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 2821 | idev = addrconf_add_dev(dev); |
Brian Haley | 64e724f | 2010-07-20 10:34:30 +0000 | [diff] [blame] | 2822 | if (IS_ERR(idev)) { |
Joe Perches | 91df42b | 2012-05-15 14:11:54 +0000 | [diff] [blame] | 2823 | pr_debug("init ip6-ip6: add_dev failed\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2824 | return; |
| 2825 | } |
| 2826 | ip6_tnl_add_linklocal(idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2827 | } |
| 2828 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2829 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
Jiri Pirko | 351638e | 2013-05-28 01:30:21 +0000 | [diff] [blame] | 2830 | void *ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2831 | { |
Jiri Pirko | 351638e | 2013-05-28 01:30:21 +0000 | [diff] [blame] | 2832 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
Eric Dumazet | 748e2d9 | 2012-08-22 21:50:59 +0000 | [diff] [blame] | 2833 | struct inet6_dev *idev = __in6_dev_get(dev); |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 2834 | int run_pending = 0; |
Herbert Xu | b217d61 | 2007-07-30 17:04:52 -0700 | [diff] [blame] | 2835 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2836 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 2837 | switch (event) { |
YOSHIFUJI Hideaki | 45ba9dd | 2007-02-15 02:07:27 +0900 | [diff] [blame] | 2838 | case NETDEV_REGISTER: |
Herbert Xu | 74235a2 | 2007-06-14 13:02:55 -0700 | [diff] [blame] | 2839 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
YOSHIFUJI Hideaki | 45ba9dd | 2007-02-15 02:07:27 +0900 | [diff] [blame] | 2840 | idev = ipv6_add_dev(dev); |
| 2841 | if (!idev) |
Herbert Xu | b217d61 | 2007-07-30 17:04:52 -0700 | [diff] [blame] | 2842 | return notifier_from_errno(-ENOMEM); |
YOSHIFUJI Hideaki | 45ba9dd | 2007-02-15 02:07:27 +0900 | [diff] [blame] | 2843 | } |
| 2844 | break; |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 2845 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2846 | case NETDEV_UP: |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2847 | case NETDEV_CHANGE: |
Jay Vosburgh | c2edacf | 2007-07-09 10:42:47 -0700 | [diff] [blame] | 2848 | if (dev->flags & IFF_SLAVE) |
| 2849 | break; |
| 2850 | |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2851 | if (event == NETDEV_UP) { |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 2852 | if (!addrconf_qdisc_ok(dev)) { |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2853 | /* device is not ready yet. */ |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 2854 | pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n", |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2855 | dev->name); |
| 2856 | break; |
| 2857 | } |
Kristian Slavov | 9908104 | 2006-02-08 16:10:53 -0800 | [diff] [blame] | 2858 | |
Evgeniy Polyakov | d31c7b8 | 2007-11-30 23:36:08 +1100 | [diff] [blame] | 2859 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
| 2860 | idev = ipv6_add_dev(dev); |
| 2861 | |
Benjamin Thery | e3ec6cf | 2008-11-05 01:43:57 -0800 | [diff] [blame] | 2862 | if (idev) { |
Kristian Slavov | 9908104 | 2006-02-08 16:10:53 -0800 | [diff] [blame] | 2863 | idev->if_flags |= IF_READY; |
Benjamin Thery | e3ec6cf | 2008-11-05 01:43:57 -0800 | [diff] [blame] | 2864 | run_pending = 1; |
| 2865 | } |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2866 | } else { |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 2867 | if (!addrconf_qdisc_ok(dev)) { |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2868 | /* device is still not ready. */ |
| 2869 | break; |
| 2870 | } |
| 2871 | |
| 2872 | if (idev) { |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 2873 | if (idev->if_flags & IF_READY) |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2874 | /* device is already configured. */ |
| 2875 | break; |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2876 | idev->if_flags |= IF_READY; |
| 2877 | } |
| 2878 | |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 2879 | pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n", |
| 2880 | dev->name); |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2881 | |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 2882 | run_pending = 1; |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2883 | } |
| 2884 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 2885 | switch (dev->type) { |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 2886 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2887 | case ARPHRD_SIT: |
| 2888 | addrconf_sit_config(dev); |
| 2889 | break; |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2890 | #endif |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 2891 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
stephen hemminger | aee80b5 | 2011-06-08 10:44:30 +0000 | [diff] [blame] | 2892 | case ARPHRD_IPGRE: |
| 2893 | addrconf_gre_config(dev); |
| 2894 | break; |
| 2895 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2896 | case ARPHRD_TUNNEL6: |
| 2897 | addrconf_ip6_tnl_config(dev); |
| 2898 | break; |
| 2899 | case ARPHRD_LOOPBACK: |
| 2900 | init_loopback(dev); |
| 2901 | break; |
| 2902 | |
| 2903 | default: |
| 2904 | addrconf_dev_config(dev); |
| 2905 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 2906 | } |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 2907 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2908 | if (idev) { |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 2909 | if (run_pending) |
| 2910 | addrconf_dad_run(idev); |
| 2911 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 2912 | /* |
| 2913 | * If the MTU changed during the interface down, |
| 2914 | * when the interface up, the changed MTU must be |
| 2915 | * reflected in the idev as well as routers. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2916 | */ |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 2917 | if (idev->cnf.mtu6 != dev->mtu && |
| 2918 | dev->mtu >= IPV6_MIN_MTU) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2919 | rt6_mtu_change(dev, dev->mtu); |
| 2920 | idev->cnf.mtu6 = dev->mtu; |
| 2921 | } |
| 2922 | idev->tstamp = jiffies; |
| 2923 | inet6_ifinfo_notify(RTM_NEWLINK, idev); |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 2924 | |
| 2925 | /* |
| 2926 | * If the changed mtu during down is lower than |
| 2927 | * IPV6_MIN_MTU stop IPv6 on this interface. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2928 | */ |
| 2929 | if (dev->mtu < IPV6_MIN_MTU) |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 2930 | addrconf_ifdown(dev, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2931 | } |
| 2932 | break; |
| 2933 | |
| 2934 | case NETDEV_CHANGEMTU: |
Evgeniy Polyakov | d31c7b8 | 2007-11-30 23:36:08 +1100 | [diff] [blame] | 2935 | if (idev && dev->mtu >= IPV6_MIN_MTU) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2936 | rt6_mtu_change(dev, dev->mtu); |
| 2937 | idev->cnf.mtu6 = dev->mtu; |
| 2938 | break; |
| 2939 | } |
| 2940 | |
Evgeniy Polyakov | d31c7b8 | 2007-11-30 23:36:08 +1100 | [diff] [blame] | 2941 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
| 2942 | idev = ipv6_add_dev(dev); |
| 2943 | if (idev) |
| 2944 | break; |
| 2945 | } |
| 2946 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 2947 | /* |
| 2948 | * MTU falled under IPV6_MIN_MTU. |
| 2949 | * Stop IPv6 on this interface. |
| 2950 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2951 | |
| 2952 | case NETDEV_DOWN: |
| 2953 | case NETDEV_UNREGISTER: |
| 2954 | /* |
| 2955 | * Remove all addresses from this interface. |
| 2956 | */ |
| 2957 | addrconf_ifdown(dev, event != NETDEV_DOWN); |
| 2958 | break; |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2959 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2960 | case NETDEV_CHANGENAME: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2961 | if (idev) { |
Stephen Hemminger | 5632c51 | 2007-04-28 21:16:39 -0700 | [diff] [blame] | 2962 | snmp6_unregister_dev(idev); |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 2963 | addrconf_sysctl_unregister(idev); |
Pavel Emelyanov | f52295a | 2007-12-02 00:58:37 +1100 | [diff] [blame] | 2964 | addrconf_sysctl_register(idev); |
Herbert Xu | b217d61 | 2007-07-30 17:04:52 -0700 | [diff] [blame] | 2965 | err = snmp6_register_dev(idev); |
| 2966 | if (err) |
| 2967 | return notifier_from_errno(err); |
Stephen Hemminger | 5632c51 | 2007-04-28 21:16:39 -0700 | [diff] [blame] | 2968 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2969 | break; |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 2970 | |
Jiri Pirko | 93d9b7d | 2010-03-10 10:28:56 +0000 | [diff] [blame] | 2971 | case NETDEV_PRE_TYPE_CHANGE: |
| 2972 | case NETDEV_POST_TYPE_CHANGE: |
| 2973 | addrconf_type_change(dev, event); |
Moni Shoua | 75c7850 | 2009-09-15 02:37:40 -0700 | [diff] [blame] | 2974 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 2975 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2976 | |
| 2977 | return NOTIFY_OK; |
| 2978 | } |
| 2979 | |
| 2980 | /* |
| 2981 | * addrconf module should be notified of a device going up |
| 2982 | */ |
| 2983 | static struct notifier_block ipv6_dev_notf = { |
| 2984 | .notifier_call = addrconf_notify, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2985 | }; |
| 2986 | |
Jiri Pirko | 93d9b7d | 2010-03-10 10:28:56 +0000 | [diff] [blame] | 2987 | static void addrconf_type_change(struct net_device *dev, unsigned long event) |
Moni Shoua | 75c7850 | 2009-09-15 02:37:40 -0700 | [diff] [blame] | 2988 | { |
| 2989 | struct inet6_dev *idev; |
| 2990 | ASSERT_RTNL(); |
| 2991 | |
| 2992 | idev = __in6_dev_get(dev); |
| 2993 | |
Jiri Pirko | 93d9b7d | 2010-03-10 10:28:56 +0000 | [diff] [blame] | 2994 | if (event == NETDEV_POST_TYPE_CHANGE) |
Moni Shoua | 75c7850 | 2009-09-15 02:37:40 -0700 | [diff] [blame] | 2995 | ipv6_mc_remap(idev); |
Jiri Pirko | 93d9b7d | 2010-03-10 10:28:56 +0000 | [diff] [blame] | 2996 | else if (event == NETDEV_PRE_TYPE_CHANGE) |
Moni Shoua | 75c7850 | 2009-09-15 02:37:40 -0700 | [diff] [blame] | 2997 | ipv6_mc_unmap(idev); |
| 2998 | } |
| 2999 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3000 | static int addrconf_ifdown(struct net_device *dev, int how) |
| 3001 | { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 3002 | struct net *net = dev_net(dev); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 3003 | struct inet6_dev *idev; |
| 3004 | struct inet6_ifaddr *ifa; |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3005 | int state, i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3006 | |
| 3007 | ASSERT_RTNL(); |
| 3008 | |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3009 | rt6_ifdown(net, dev); |
| 3010 | neigh_ifdown(&nd_tbl, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3011 | |
| 3012 | idev = __in6_dev_get(dev); |
| 3013 | if (idev == NULL) |
| 3014 | return -ENODEV; |
| 3015 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3016 | /* |
| 3017 | * Step 1: remove reference to ipv6 device from parent device. |
| 3018 | * Do not dev_put! |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3019 | */ |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 3020 | if (how) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3021 | idev->dead = 1; |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 3022 | |
| 3023 | /* protected by rtnl_lock */ |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 3024 | RCU_INIT_POINTER(dev->ip6_ptr, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3025 | |
| 3026 | /* Step 1.5: remove snmp6 entry */ |
| 3027 | snmp6_unregister_dev(idev); |
| 3028 | |
| 3029 | } |
| 3030 | |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3031 | /* Step 2: clear hash table */ |
| 3032 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
| 3033 | struct hlist_head *h = &inet6_addr_lst[i]; |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3034 | |
| 3035 | spin_lock_bh(&addrconf_hash_lock); |
| 3036 | restart: |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 3037 | hlist_for_each_entry_rcu(ifa, h, addr_lst) { |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3038 | if (ifa->idev == idev) { |
| 3039 | hlist_del_init_rcu(&ifa->addr_lst); |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3040 | addrconf_del_dad_timer(ifa); |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3041 | goto restart; |
| 3042 | } |
| 3043 | } |
| 3044 | spin_unlock_bh(&addrconf_hash_lock); |
| 3045 | } |
| 3046 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3047 | write_lock_bh(&idev->lock); |
| 3048 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3049 | addrconf_del_rs_timer(idev); |
| 3050 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3051 | /* Step 2: clear flags for stateless addrconf */ |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 3052 | if (!how) |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3053 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3054 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3055 | #ifdef CONFIG_IPV6_PRIVACY |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 3056 | if (how && del_timer(&idev->regen_timer)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3057 | in6_dev_put(idev); |
| 3058 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3059 | /* Step 3: clear tempaddr list */ |
stephen hemminger | 372e6c8 | 2010-03-17 20:31:09 +0000 | [diff] [blame] | 3060 | while (!list_empty(&idev->tempaddr_list)) { |
| 3061 | ifa = list_first_entry(&idev->tempaddr_list, |
| 3062 | struct inet6_ifaddr, tmp_list); |
| 3063 | list_del(&ifa->tmp_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3064 | write_unlock_bh(&idev->lock); |
| 3065 | spin_lock_bh(&ifa->lock); |
| 3066 | |
| 3067 | if (ifa->ifpub) { |
| 3068 | in6_ifa_put(ifa->ifpub); |
| 3069 | ifa->ifpub = NULL; |
| 3070 | } |
| 3071 | spin_unlock_bh(&ifa->lock); |
| 3072 | in6_ifa_put(ifa); |
| 3073 | write_lock_bh(&idev->lock); |
| 3074 | } |
| 3075 | #endif |
stephen hemminger | 8f37ada | 2010-03-03 08:19:59 +0000 | [diff] [blame] | 3076 | |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 3077 | while (!list_empty(&idev->addr_list)) { |
| 3078 | ifa = list_first_entry(&idev->addr_list, |
| 3079 | struct inet6_ifaddr, if_list); |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3080 | addrconf_del_dad_timer(ifa); |
stephen hemminger | 84e8b80 | 2010-03-02 13:32:46 +0000 | [diff] [blame] | 3081 | |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3082 | list_del(&ifa->if_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3083 | |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3084 | write_unlock_bh(&idev->lock); |
stephen hemminger | 84e8b80 | 2010-03-02 13:32:46 +0000 | [diff] [blame] | 3085 | |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3086 | spin_lock_bh(&ifa->state_lock); |
| 3087 | state = ifa->state; |
| 3088 | ifa->state = INET6_IFADDR_STATE_DEAD; |
| 3089 | spin_unlock_bh(&ifa->state_lock); |
stephen hemminger | 84e8b80 | 2010-03-02 13:32:46 +0000 | [diff] [blame] | 3090 | |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3091 | if (state != INET6_IFADDR_STATE_DEAD) { |
| 3092 | __ipv6_ifa_notify(RTM_DELADDR, ifa); |
Cong Wang | f88c91d | 2013-04-14 23:18:43 +0800 | [diff] [blame] | 3093 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifa); |
stephen hemminger | 27bdb2a | 2010-04-12 05:41:32 +0000 | [diff] [blame] | 3094 | } |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3095 | in6_ifa_put(ifa); |
stephen hemminger | 8f37ada | 2010-03-03 08:19:59 +0000 | [diff] [blame] | 3096 | |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 3097 | write_lock_bh(&idev->lock); |
| 3098 | } |
stephen hemminger | 8f37ada | 2010-03-03 08:19:59 +0000 | [diff] [blame] | 3099 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3100 | write_unlock_bh(&idev->lock); |
| 3101 | |
| 3102 | /* Step 5: Discard multicast list */ |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 3103 | if (how) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3104 | ipv6_mc_destroy_dev(idev); |
| 3105 | else |
| 3106 | ipv6_mc_down(idev); |
| 3107 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3108 | idev->tstamp = jiffies; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3109 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3110 | /* Last: Shot the device (if unregistered) */ |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 3111 | if (how) { |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 3112 | addrconf_sysctl_unregister(idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3113 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
| 3114 | neigh_ifdown(&nd_tbl, dev); |
| 3115 | in6_dev_put(idev); |
| 3116 | } |
| 3117 | return 0; |
| 3118 | } |
| 3119 | |
| 3120 | static void addrconf_rs_timer(unsigned long data) |
| 3121 | { |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3122 | struct inet6_dev *idev = (struct inet6_dev *)data; |
| 3123 | struct in6_addr lladdr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3124 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3125 | write_lock(&idev->lock); |
stephen hemminger | 5b2a195 | 2010-03-02 13:32:45 +0000 | [diff] [blame] | 3126 | if (idev->dead || !(idev->if_flags & IF_READY)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3127 | goto out; |
| 3128 | |
Shmulik Ladkani | 9ba2add | 2012-12-02 01:44:53 +0000 | [diff] [blame] | 3129 | if (!ipv6_accept_ra(idev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3130 | goto out; |
stephen hemminger | 5b2a195 | 2010-03-02 13:32:45 +0000 | [diff] [blame] | 3131 | |
| 3132 | /* Announcement received after solicitation was sent */ |
| 3133 | if (idev->if_flags & IF_RA_RCVD) |
| 3134 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3135 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3136 | if (idev->rs_probes++ < idev->cnf.rtr_solicits) { |
| 3137 | if (!__ipv6_get_lladdr(idev, &lladdr, IFA_F_TENTATIVE)) |
| 3138 | ndisc_send_rs(idev->dev, &lladdr, |
| 3139 | &in6addr_linklocal_allrouters); |
| 3140 | else |
| 3141 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3142 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3143 | /* The wait after the last probe can be shorter */ |
| 3144 | addrconf_mod_rs_timer(idev, (idev->rs_probes == |
| 3145 | idev->cnf.rtr_solicits) ? |
| 3146 | idev->cnf.rtr_solicit_delay : |
| 3147 | idev->cnf.rtr_solicit_interval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3148 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3149 | /* |
| 3150 | * Note: we do not support deprecated "all on-link" |
| 3151 | * assumption any longer. |
| 3152 | */ |
Joe Perches | 91df42b | 2012-05-15 14:11:54 +0000 | [diff] [blame] | 3153 | pr_debug("%s: no IPv6 routers present\n", idev->dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3154 | } |
| 3155 | |
| 3156 | out: |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3157 | write_unlock(&idev->lock); |
| 3158 | in6_dev_put(idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3159 | } |
| 3160 | |
| 3161 | /* |
| 3162 | * Duplicate Address Detection |
| 3163 | */ |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3164 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
| 3165 | { |
| 3166 | unsigned long rand_num; |
| 3167 | struct inet6_dev *idev = ifp->idev; |
| 3168 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 3169 | if (ifp->flags & IFA_F_OPTIMISTIC) |
| 3170 | rand_num = 0; |
| 3171 | else |
| 3172 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); |
| 3173 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3174 | ifp->dad_probes = idev->cnf.dad_transmits; |
| 3175 | addrconf_mod_dad_timer(ifp, rand_num); |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3176 | } |
| 3177 | |
David S. Miller | cf22f9a | 2012-04-14 21:37:40 -0400 | [diff] [blame] | 3178 | static void addrconf_dad_start(struct inet6_ifaddr *ifp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3179 | { |
| 3180 | struct inet6_dev *idev = ifp->idev; |
| 3181 | struct net_device *dev = idev->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3182 | |
| 3183 | addrconf_join_solict(dev, &ifp->addr); |
| 3184 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3185 | net_srandom(ifp->addr.s6_addr32[3]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3186 | |
| 3187 | read_lock_bh(&idev->lock); |
Herbert Xu | 622ccdf | 2010-05-18 15:56:06 -0700 | [diff] [blame] | 3188 | spin_lock(&ifp->lock); |
Herbert Xu | e9d3e08 | 2010-05-18 15:36:06 -0700 | [diff] [blame] | 3189 | if (ifp->state == INET6_IFADDR_STATE_DEAD) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3190 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3191 | |
| 3192 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 3193 | idev->cnf.accept_dad < 1 || |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 3194 | !(ifp->flags&IFA_F_TENTATIVE) || |
| 3195 | ifp->flags & IFA_F_NODAD) { |
Brian Haley | cc411d0 | 2009-09-09 14:41:32 +0000 | [diff] [blame] | 3196 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 3197 | spin_unlock(&ifp->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3198 | read_unlock_bh(&idev->lock); |
| 3199 | |
| 3200 | addrconf_dad_completed(ifp); |
| 3201 | return; |
| 3202 | } |
| 3203 | |
YOSHIFUJI Hideaki | 6732bad | 2005-12-27 13:35:15 -0800 | [diff] [blame] | 3204 | if (!(idev->if_flags & IF_READY)) { |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 3205 | spin_unlock(&ifp->lock); |
YOSHIFUJI Hideaki | 6732bad | 2005-12-27 13:35:15 -0800 | [diff] [blame] | 3206 | read_unlock_bh(&idev->lock); |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3207 | /* |
Masatake YAMATO | 590a988 | 2009-06-09 10:41:12 +0900 | [diff] [blame] | 3208 | * If the device is not ready: |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3209 | * - keep it tentative if it is a permanent address. |
| 3210 | * - otherwise, kill it. |
| 3211 | */ |
| 3212 | in6_ifa_hold(ifp); |
Brian Haley | cc411d0 | 2009-09-09 14:41:32 +0000 | [diff] [blame] | 3213 | addrconf_dad_stop(ifp, 0); |
YOSHIFUJI Hideaki | 6732bad | 2005-12-27 13:35:15 -0800 | [diff] [blame] | 3214 | return; |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 3215 | } |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 3216 | |
| 3217 | /* |
| 3218 | * Optimistic nodes can start receiving |
| 3219 | * Frames right away |
| 3220 | */ |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 3221 | if (ifp->flags & IFA_F_OPTIMISTIC) |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 3222 | ip6_ins_rt(ifp->rt); |
| 3223 | |
YOSHIFUJI Hideaki | 6732bad | 2005-12-27 13:35:15 -0800 | [diff] [blame] | 3224 | addrconf_dad_kick(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3225 | out: |
Herbert Xu | 622ccdf | 2010-05-18 15:56:06 -0700 | [diff] [blame] | 3226 | spin_unlock(&ifp->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3227 | read_unlock_bh(&idev->lock); |
| 3228 | } |
| 3229 | |
| 3230 | static void addrconf_dad_timer(unsigned long data) |
| 3231 | { |
| 3232 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; |
| 3233 | struct inet6_dev *idev = ifp->idev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3234 | struct in6_addr mcaddr; |
| 3235 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3236 | if (!ifp->dad_probes && addrconf_dad_end(ifp)) |
Herbert Xu | f2344a1 | 2010-05-18 15:55:27 -0700 | [diff] [blame] | 3237 | goto out; |
| 3238 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3239 | write_lock(&idev->lock); |
stephen hemminger | 122e451 | 2010-03-02 13:32:44 +0000 | [diff] [blame] | 3240 | if (idev->dead || !(idev->if_flags & IF_READY)) { |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3241 | write_unlock(&idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3242 | goto out; |
| 3243 | } |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 3244 | |
| 3245 | spin_lock(&ifp->lock); |
Herbert Xu | 622ccdf | 2010-05-18 15:56:06 -0700 | [diff] [blame] | 3246 | if (ifp->state == INET6_IFADDR_STATE_DEAD) { |
| 3247 | spin_unlock(&ifp->lock); |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3248 | write_unlock(&idev->lock); |
Herbert Xu | 622ccdf | 2010-05-18 15:56:06 -0700 | [diff] [blame] | 3249 | goto out; |
| 3250 | } |
| 3251 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3252 | if (ifp->dad_probes == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3253 | /* |
| 3254 | * DAD was successful |
| 3255 | */ |
| 3256 | |
Brian Haley | cc411d0 | 2009-09-09 14:41:32 +0000 | [diff] [blame] | 3257 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 3258 | spin_unlock(&ifp->lock); |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3259 | write_unlock(&idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3260 | |
| 3261 | addrconf_dad_completed(ifp); |
| 3262 | |
| 3263 | goto out; |
| 3264 | } |
| 3265 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3266 | ifp->dad_probes--; |
| 3267 | addrconf_mod_dad_timer(ifp, ifp->idev->nd_parms->retrans_time); |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 3268 | spin_unlock(&ifp->lock); |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3269 | write_unlock(&idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3270 | |
| 3271 | /* send a neighbour solicitation for our addr */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3272 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
YOSHIFUJI Hideaki | d7aabf2 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 3273 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3274 | out: |
| 3275 | in6_ifa_put(ifp); |
| 3276 | } |
| 3277 | |
| 3278 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) |
| 3279 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 3280 | struct net_device *dev = ifp->idev->dev; |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3281 | struct in6_addr lladdr; |
Hannes Frederic Sowa | b173ee4 | 2013-06-27 00:07:01 +0200 | [diff] [blame] | 3282 | bool send_rs, send_mld; |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3283 | |
| 3284 | addrconf_del_dad_timer(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3285 | |
| 3286 | /* |
| 3287 | * Configure the address for reception. Now it is valid. |
| 3288 | */ |
| 3289 | |
| 3290 | ipv6_ifa_notify(RTM_NEWADDR, ifp); |
| 3291 | |
Tore Anderson | 026359b | 2011-08-28 23:47:33 +0000 | [diff] [blame] | 3292 | /* If added prefix is link local and we are prepared to process |
| 3293 | router advertisements, start sending router solicitations. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3294 | */ |
| 3295 | |
Hannes Frederic Sowa | 1ec047e | 2013-06-27 00:06:56 +0200 | [diff] [blame] | 3296 | read_lock_bh(&ifp->idev->lock); |
| 3297 | spin_lock(&ifp->lock); |
Hannes Frederic Sowa | b173ee4 | 2013-06-27 00:07:01 +0200 | [diff] [blame] | 3298 | send_mld = ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL && |
| 3299 | ifp->idev->valid_ll_addr_cnt == 1; |
| 3300 | send_rs = send_mld && |
| 3301 | ipv6_accept_ra(ifp->idev) && |
Hannes Frederic Sowa | 1ec047e | 2013-06-27 00:06:56 +0200 | [diff] [blame] | 3302 | ifp->idev->cnf.rtr_solicits > 0 && |
Hannes Frederic Sowa | b173ee4 | 2013-06-27 00:07:01 +0200 | [diff] [blame] | 3303 | (dev->flags&IFF_LOOPBACK) == 0; |
Hannes Frederic Sowa | 1ec047e | 2013-06-27 00:06:56 +0200 | [diff] [blame] | 3304 | spin_unlock(&ifp->lock); |
| 3305 | read_unlock_bh(&ifp->idev->lock); |
| 3306 | |
Hannes Frederic Sowa | b173ee4 | 2013-06-27 00:07:01 +0200 | [diff] [blame] | 3307 | /* While dad is in progress mld report's source address is in6_addrany. |
| 3308 | * Resend with proper ll now. |
| 3309 | */ |
| 3310 | if (send_mld) |
| 3311 | ipv6_mc_dad_complete(ifp->idev); |
| 3312 | |
Hannes Frederic Sowa | 1ec047e | 2013-06-27 00:06:56 +0200 | [diff] [blame] | 3313 | if (send_rs) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3314 | /* |
| 3315 | * If a host as already performed a random delay |
| 3316 | * [...] as part of DAD [...] there is no need |
| 3317 | * to delay again before sending the first RS |
| 3318 | */ |
Hannes Frederic Sowa | 1ec047e | 2013-06-27 00:06:56 +0200 | [diff] [blame] | 3319 | if (ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3320 | return; |
Hannes Frederic Sowa | 1ec047e | 2013-06-27 00:06:56 +0200 | [diff] [blame] | 3321 | ndisc_send_rs(dev, &lladdr, &in6addr_linklocal_allrouters); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3322 | |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3323 | write_lock_bh(&ifp->idev->lock); |
| 3324 | spin_lock(&ifp->lock); |
| 3325 | ifp->idev->rs_probes = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3326 | ifp->idev->if_flags |= IF_RS_SENT; |
Hannes Frederic Sowa | b7b1bfc | 2013-06-23 18:39:01 +0200 | [diff] [blame] | 3327 | addrconf_mod_rs_timer(ifp->idev, |
| 3328 | ifp->idev->cnf.rtr_solicit_interval); |
| 3329 | spin_unlock(&ifp->lock); |
| 3330 | write_unlock_bh(&ifp->idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3331 | } |
| 3332 | } |
| 3333 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 3334 | static void addrconf_dad_run(struct inet6_dev *idev) |
| 3335 | { |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 3336 | struct inet6_ifaddr *ifp; |
| 3337 | |
| 3338 | read_lock_bh(&idev->lock); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 3339 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 3340 | spin_lock(&ifp->lock); |
Herbert Xu | f2344a1 | 2010-05-18 15:55:27 -0700 | [diff] [blame] | 3341 | if (ifp->flags & IFA_F_TENTATIVE && |
| 3342 | ifp->state == INET6_IFADDR_STATE_DAD) |
| 3343 | addrconf_dad_kick(ifp); |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 3344 | spin_unlock(&ifp->lock); |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 3345 | } |
| 3346 | read_unlock_bh(&idev->lock); |
| 3347 | } |
| 3348 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3349 | #ifdef CONFIG_PROC_FS |
| 3350 | struct if6_iter_state { |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 3351 | struct seq_net_private p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3352 | int bucket; |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3353 | int offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3354 | }; |
| 3355 | |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3356 | 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] | 3357 | { |
| 3358 | struct inet6_ifaddr *ifa = NULL; |
| 3359 | struct if6_iter_state *state = seq->private; |
YOSHIFUJI Hideaki | 1218854 | 2008-03-26 02:36:06 +0900 | [diff] [blame] | 3360 | struct net *net = seq_file_net(seq); |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3361 | int p = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3362 | |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3363 | /* initial bucket if pos is 0 */ |
| 3364 | if (pos == 0) { |
| 3365 | state->bucket = 0; |
| 3366 | state->offset = 0; |
| 3367 | } |
| 3368 | |
| 3369 | for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 3370 | hlist_for_each_entry_rcu_bh(ifa, &inet6_addr_lst[state->bucket], |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3371 | addr_lst) { |
Eric Dumazet | 9f0d3c2 | 2012-10-16 07:37:27 +0000 | [diff] [blame] | 3372 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
| 3373 | continue; |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3374 | /* sync with offset */ |
| 3375 | if (p < state->offset) { |
| 3376 | p++; |
| 3377 | continue; |
| 3378 | } |
| 3379 | state->offset++; |
Eric Dumazet | 9f0d3c2 | 2012-10-16 07:37:27 +0000 | [diff] [blame] | 3380 | return ifa; |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3381 | } |
| 3382 | |
| 3383 | /* prepare for next bucket */ |
| 3384 | state->offset = 0; |
| 3385 | p = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3386 | } |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 3387 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3388 | } |
| 3389 | |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 3390 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, |
| 3391 | struct inet6_ifaddr *ifa) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3392 | { |
| 3393 | struct if6_iter_state *state = seq->private; |
YOSHIFUJI Hideaki | 1218854 | 2008-03-26 02:36:06 +0900 | [diff] [blame] | 3394 | struct net *net = seq_file_net(seq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3395 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 3396 | hlist_for_each_entry_continue_rcu_bh(ifa, addr_lst) { |
Eric Dumazet | 9f0d3c2 | 2012-10-16 07:37:27 +0000 | [diff] [blame] | 3397 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
| 3398 | continue; |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3399 | state->offset++; |
Eric Dumazet | 9f0d3c2 | 2012-10-16 07:37:27 +0000 | [diff] [blame] | 3400 | return ifa; |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3401 | } |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 3402 | |
| 3403 | while (++state->bucket < IN6_ADDR_HSIZE) { |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3404 | state->offset = 0; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 3405 | hlist_for_each_entry_rcu_bh(ifa, |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 3406 | &inet6_addr_lst[state->bucket], addr_lst) { |
Eric Dumazet | 9f0d3c2 | 2012-10-16 07:37:27 +0000 | [diff] [blame] | 3407 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
| 3408 | continue; |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3409 | state->offset++; |
Eric Dumazet | 9f0d3c2 | 2012-10-16 07:37:27 +0000 | [diff] [blame] | 3410 | return ifa; |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 3411 | } |
| 3412 | } |
| 3413 | |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 3414 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3415 | } |
| 3416 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3417 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) |
Eric Dumazet | 4f70ecc | 2010-05-03 10:50:14 +0000 | [diff] [blame] | 3418 | __acquires(rcu_bh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3419 | { |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 3420 | rcu_read_lock_bh(); |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3421 | return if6_get_first(seq, *pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3422 | } |
| 3423 | |
| 3424 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 3425 | { |
| 3426 | struct inet6_ifaddr *ifa; |
| 3427 | |
| 3428 | ifa = if6_get_next(seq, v); |
| 3429 | ++*pos; |
| 3430 | return ifa; |
| 3431 | } |
| 3432 | |
| 3433 | static void if6_seq_stop(struct seq_file *seq, void *v) |
Eric Dumazet | 4f70ecc | 2010-05-03 10:50:14 +0000 | [diff] [blame] | 3434 | __releases(rcu_bh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3435 | { |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 3436 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3437 | } |
| 3438 | |
| 3439 | static int if6_seq_show(struct seq_file *seq, void *v) |
| 3440 | { |
| 3441 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; |
Harvey Harrison | 4b7a427 | 2008-10-29 12:50:24 -0700 | [diff] [blame] | 3442 | seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", |
Harvey Harrison | b071195 | 2008-10-28 16:05:40 -0700 | [diff] [blame] | 3443 | &ifp->addr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3444 | ifp->idev->dev->ifindex, |
| 3445 | ifp->prefix_len, |
| 3446 | ifp->scope, |
| 3447 | ifp->flags, |
| 3448 | ifp->idev->dev->name); |
| 3449 | return 0; |
| 3450 | } |
| 3451 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 3452 | static const struct seq_operations if6_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3453 | .start = if6_seq_start, |
| 3454 | .next = if6_seq_next, |
| 3455 | .show = if6_seq_show, |
| 3456 | .stop = if6_seq_stop, |
| 3457 | }; |
| 3458 | |
| 3459 | static int if6_seq_open(struct inode *inode, struct file *file) |
| 3460 | { |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 3461 | return seq_open_net(inode, file, &if6_seq_ops, |
| 3462 | sizeof(struct if6_iter_state)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3463 | } |
| 3464 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 3465 | static const struct file_operations if6_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3466 | .owner = THIS_MODULE, |
| 3467 | .open = if6_seq_open, |
| 3468 | .read = seq_read, |
| 3469 | .llseek = seq_lseek, |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 3470 | .release = seq_release_net, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3471 | }; |
| 3472 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 3473 | static int __net_init if6_proc_net_init(struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3474 | { |
Gao feng | d4beaa6 | 2013-02-18 01:34:54 +0000 | [diff] [blame] | 3475 | if (!proc_create("if_inet6", S_IRUGO, net->proc_net, &if6_fops)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3476 | return -ENOMEM; |
| 3477 | return 0; |
| 3478 | } |
| 3479 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 3480 | static void __net_exit if6_proc_net_exit(struct net *net) |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 3481 | { |
Gao feng | ece31ff | 2013-02-18 01:34:56 +0000 | [diff] [blame] | 3482 | remove_proc_entry("if_inet6", net->proc_net); |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 3483 | } |
| 3484 | |
| 3485 | static struct pernet_operations if6_proc_net_ops = { |
| 3486 | .init = if6_proc_net_init, |
| 3487 | .exit = if6_proc_net_exit, |
| 3488 | }; |
| 3489 | |
| 3490 | int __init if6_proc_init(void) |
| 3491 | { |
| 3492 | return register_pernet_subsys(&if6_proc_net_ops); |
| 3493 | } |
| 3494 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3495 | void if6_proc_exit(void) |
| 3496 | { |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 3497 | unregister_pernet_subsys(&if6_proc_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3498 | } |
| 3499 | #endif /* CONFIG_PROC_FS */ |
| 3500 | |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 3501 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 3502 | /* Check if address is a home address configured on any interface. */ |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 3503 | 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] | 3504 | { |
| 3505 | int ret = 0; |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 3506 | struct inet6_ifaddr *ifp = NULL; |
Eric Dumazet | ddbe503 | 2012-07-18 08:11:12 +0000 | [diff] [blame] | 3507 | unsigned int hash = inet6_addr_hash(addr); |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 3508 | |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 3509 | rcu_read_lock_bh(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 3510 | 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] | 3511 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
Daniel Lezcano | 389f661 | 2008-01-10 22:44:40 -0800 | [diff] [blame] | 3512 | continue; |
YOSHIFUJI Hideaki | caad295 | 2008-04-10 15:42:07 +0900 | [diff] [blame] | 3513 | if (ipv6_addr_equal(&ifp->addr, addr) && |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 3514 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
| 3515 | ret = 1; |
| 3516 | break; |
| 3517 | } |
| 3518 | } |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 3519 | rcu_read_unlock_bh(); |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 3520 | return ret; |
| 3521 | } |
| 3522 | #endif |
| 3523 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3524 | /* |
| 3525 | * Periodic address status verification |
| 3526 | */ |
| 3527 | |
| 3528 | static void addrconf_verify(unsigned long foo) |
| 3529 | { |
YOSHIFUJI Hideaki | b2db756 | 2010-03-20 16:11:12 -0700 | [diff] [blame] | 3530 | unsigned long now, next, next_sec, next_sched; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3531 | struct inet6_ifaddr *ifp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3532 | int i; |
| 3533 | |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 3534 | rcu_read_lock_bh(); |
| 3535 | spin_lock(&addrconf_verify_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3536 | now = jiffies; |
YOSHIFUJI Hideaki | b2db756 | 2010-03-20 16:11:12 -0700 | [diff] [blame] | 3537 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3538 | |
| 3539 | del_timer(&addr_chk_timer); |
| 3540 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3541 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3542 | restart: |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 3543 | hlist_for_each_entry_rcu_bh(ifp, |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 3544 | &inet6_addr_lst[i], addr_lst) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3545 | unsigned long age; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3546 | |
| 3547 | if (ifp->flags & IFA_F_PERMANENT) |
| 3548 | continue; |
| 3549 | |
| 3550 | spin_lock(&ifp->lock); |
YOSHIFUJI Hideaki | b2db756 | 2010-03-20 16:11:12 -0700 | [diff] [blame] | 3551 | /* We try to batch several events at once. */ |
| 3552 | age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3553 | |
YOSHIFUJI Hideaki | 8f27ebb | 2006-07-28 18:12:11 +0900 | [diff] [blame] | 3554 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
| 3555 | age >= ifp->valid_lft) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3556 | spin_unlock(&ifp->lock); |
| 3557 | in6_ifa_hold(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3558 | ipv6_del_addr(ifp); |
| 3559 | goto restart; |
YOSHIFUJI Hideaki | 8f27ebb | 2006-07-28 18:12:11 +0900 | [diff] [blame] | 3560 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
| 3561 | spin_unlock(&ifp->lock); |
| 3562 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3563 | } else if (age >= ifp->prefered_lft) { |
Brian Haley | a1ed052 | 2009-07-02 07:10:52 +0000 | [diff] [blame] | 3564 | /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3565 | int deprecate = 0; |
| 3566 | |
| 3567 | if (!(ifp->flags&IFA_F_DEPRECATED)) { |
| 3568 | deprecate = 1; |
| 3569 | ifp->flags |= IFA_F_DEPRECATED; |
| 3570 | } |
| 3571 | |
| 3572 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) |
| 3573 | next = ifp->tstamp + ifp->valid_lft * HZ; |
| 3574 | |
| 3575 | spin_unlock(&ifp->lock); |
| 3576 | |
| 3577 | if (deprecate) { |
| 3578 | in6_ifa_hold(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3579 | |
| 3580 | ipv6_ifa_notify(0, ifp); |
| 3581 | in6_ifa_put(ifp); |
| 3582 | goto restart; |
| 3583 | } |
| 3584 | #ifdef CONFIG_IPV6_PRIVACY |
| 3585 | } else if ((ifp->flags&IFA_F_TEMPORARY) && |
| 3586 | !(ifp->flags&IFA_F_TENTATIVE)) { |
stephen hemminger | 88949cf | 2010-03-17 20:31:17 +0000 | [diff] [blame] | 3587 | unsigned long regen_advance = ifp->idev->cnf.regen_max_retry * |
| 3588 | ifp->idev->cnf.dad_transmits * |
| 3589 | ifp->idev->nd_parms->retrans_time / HZ; |
| 3590 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3591 | if (age >= ifp->prefered_lft - regen_advance) { |
| 3592 | struct inet6_ifaddr *ifpub = ifp->ifpub; |
| 3593 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) |
| 3594 | next = ifp->tstamp + ifp->prefered_lft * HZ; |
| 3595 | if (!ifp->regen_count && ifpub) { |
| 3596 | ifp->regen_count++; |
| 3597 | in6_ifa_hold(ifp); |
| 3598 | in6_ifa_hold(ifpub); |
| 3599 | spin_unlock(&ifp->lock); |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 3600 | |
Hiroyuki YAMAMORI | 291d809 | 2005-12-23 11:24:05 -0800 | [diff] [blame] | 3601 | spin_lock(&ifpub->lock); |
| 3602 | ifpub->regen_count = 0; |
| 3603 | spin_unlock(&ifpub->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3604 | ipv6_create_tempaddr(ifpub, ifp); |
| 3605 | in6_ifa_put(ifpub); |
| 3606 | in6_ifa_put(ifp); |
| 3607 | goto restart; |
| 3608 | } |
| 3609 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) |
| 3610 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; |
| 3611 | spin_unlock(&ifp->lock); |
| 3612 | #endif |
| 3613 | } else { |
| 3614 | /* ifp->prefered_lft <= ifp->valid_lft */ |
| 3615 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) |
| 3616 | next = ifp->tstamp + ifp->prefered_lft * HZ; |
| 3617 | spin_unlock(&ifp->lock); |
| 3618 | } |
| 3619 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3620 | } |
| 3621 | |
YOSHIFUJI Hideaki | b2db756 | 2010-03-20 16:11:12 -0700 | [diff] [blame] | 3622 | next_sec = round_jiffies_up(next); |
| 3623 | next_sched = next; |
| 3624 | |
| 3625 | /* If rounded timeout is accurate enough, accept it. */ |
| 3626 | if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) |
| 3627 | next_sched = next_sec; |
| 3628 | |
| 3629 | /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ |
| 3630 | if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX)) |
| 3631 | next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX; |
| 3632 | |
| 3633 | ADBG((KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n", |
| 3634 | now, next, next_sec, next_sched)); |
| 3635 | |
| 3636 | addr_chk_timer.expires = next_sched; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3637 | add_timer(&addr_chk_timer); |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 3638 | spin_unlock(&addrconf_verify_lock); |
| 3639 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3640 | } |
| 3641 | |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 3642 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local, |
| 3643 | struct in6_addr **peer_pfx) |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3644 | { |
| 3645 | struct in6_addr *pfx = NULL; |
| 3646 | |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 3647 | *peer_pfx = NULL; |
| 3648 | |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3649 | if (addr) |
| 3650 | pfx = nla_data(addr); |
| 3651 | |
| 3652 | if (local) { |
| 3653 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 3654 | *peer_pfx = pfx; |
| 3655 | pfx = nla_data(local); |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3656 | } |
| 3657 | |
| 3658 | return pfx; |
| 3659 | } |
| 3660 | |
Patrick McHardy | ef7c79e | 2007-06-05 12:38:30 -0700 | [diff] [blame] | 3661 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3662 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
| 3663 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, |
| 3664 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, |
| 3665 | }; |
| 3666 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3667 | static int |
Thomas Graf | 661d296 | 2013-03-21 07:45:29 +0000 | [diff] [blame] | 3668 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3669 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 3670 | struct net *net = sock_net(skb->sk); |
Thomas Graf | b933f71 | 2006-09-18 00:10:19 -0700 | [diff] [blame] | 3671 | struct ifaddrmsg *ifm; |
| 3672 | struct nlattr *tb[IFA_MAX+1]; |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 3673 | struct in6_addr *pfx, *peer_pfx; |
Thomas Graf | b933f71 | 2006-09-18 00:10:19 -0700 | [diff] [blame] | 3674 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3675 | |
Thomas Graf | b933f71 | 2006-09-18 00:10:19 -0700 | [diff] [blame] | 3676 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
| 3677 | if (err < 0) |
| 3678 | return err; |
| 3679 | |
| 3680 | ifm = nlmsg_data(nlh); |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 3681 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3682 | if (pfx == NULL) |
| 3683 | return -EINVAL; |
| 3684 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 3685 | return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3686 | } |
| 3687 | |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 3688 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
| 3689 | u32 prefered_lft, u32 valid_lft) |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3690 | { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 3691 | u32 flags; |
| 3692 | clock_t expires; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 3693 | unsigned long timeout; |
YOSHIFUJI Hideaki | 46d4804 | 2007-02-07 20:36:26 +0900 | [diff] [blame] | 3694 | |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3695 | if (!valid_lft || (prefered_lft > valid_lft)) |
| 3696 | return -EINVAL; |
| 3697 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 3698 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
| 3699 | if (addrconf_finite_timeout(timeout)) { |
| 3700 | expires = jiffies_to_clock_t(timeout * HZ); |
| 3701 | valid_lft = timeout; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 3702 | flags = RTF_EXPIRES; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 3703 | } else { |
| 3704 | expires = 0; |
| 3705 | flags = 0; |
| 3706 | ifa_flags |= IFA_F_PERMANENT; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 3707 | } |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3708 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 3709 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
| 3710 | if (addrconf_finite_timeout(timeout)) { |
| 3711 | if (timeout == 0) |
| 3712 | ifa_flags |= IFA_F_DEPRECATED; |
| 3713 | prefered_lft = timeout; |
| 3714 | } |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3715 | |
| 3716 | spin_lock_bh(&ifp->lock); |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 3717 | ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3718 | ifp->tstamp = jiffies; |
| 3719 | ifp->valid_lft = valid_lft; |
| 3720 | ifp->prefered_lft = prefered_lft; |
| 3721 | |
| 3722 | spin_unlock_bh(&ifp->lock); |
| 3723 | if (!(ifp->flags&IFA_F_TENTATIVE)) |
| 3724 | ipv6_ifa_notify(0, ifp); |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3725 | |
YOSHIFUJI Hideaki | 46d4804 | 2007-02-07 20:36:26 +0900 | [diff] [blame] | 3726 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 3727 | expires, flags); |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3728 | addrconf_verify(0); |
| 3729 | |
| 3730 | return 0; |
| 3731 | } |
| 3732 | |
| 3733 | static int |
Thomas Graf | 661d296 | 2013-03-21 07:45:29 +0000 | [diff] [blame] | 3734 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3735 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 3736 | struct net *net = sock_net(skb->sk); |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3737 | struct ifaddrmsg *ifm; |
| 3738 | struct nlattr *tb[IFA_MAX+1]; |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 3739 | struct in6_addr *pfx, *peer_pfx; |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 3740 | struct inet6_ifaddr *ifa; |
| 3741 | struct net_device *dev; |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 3742 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
| 3743 | u8 ifa_flags; |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3744 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3745 | |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3746 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
| 3747 | if (err < 0) |
| 3748 | return err; |
| 3749 | |
| 3750 | ifm = nlmsg_data(nlh); |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 3751 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3752 | if (pfx == NULL) |
| 3753 | return -EINVAL; |
| 3754 | |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3755 | if (tb[IFA_CACHEINFO]) { |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 3756 | struct ifa_cacheinfo *ci; |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3757 | |
| 3758 | ci = nla_data(tb[IFA_CACHEINFO]); |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 3759 | valid_lft = ci->ifa_valid; |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3760 | preferred_lft = ci->ifa_prefered; |
| 3761 | } else { |
| 3762 | preferred_lft = INFINITY_LIFE_TIME; |
| 3763 | valid_lft = INFINITY_LIFE_TIME; |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 3764 | } |
| 3765 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 3766 | dev = __dev_get_by_index(net, ifm->ifa_index); |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 3767 | if (dev == NULL) |
| 3768 | return -ENODEV; |
| 3769 | |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 3770 | /* We ignore other flags so far. */ |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 3771 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 3772 | |
Daniel Lezcano | 1cab3da | 2008-01-10 22:44:09 -0800 | [diff] [blame] | 3773 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 3774 | if (ifa == NULL) { |
| 3775 | /* |
| 3776 | * It would be best to check for !NLM_F_CREATE here but |
| 3777 | * userspace alreay relies on not having to provide this. |
| 3778 | */ |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 3779 | return inet6_addr_add(net, ifm->ifa_index, pfx, peer_pfx, |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 3780 | ifm->ifa_prefixlen, ifa_flags, |
| 3781 | preferred_lft, valid_lft); |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3782 | } |
| 3783 | |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 3784 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
| 3785 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) |
| 3786 | err = -EEXIST; |
| 3787 | else |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 3788 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 3789 | |
| 3790 | in6_ifa_put(ifa); |
| 3791 | |
| 3792 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3793 | } |
| 3794 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3795 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
| 3796 | u8 scope, int ifindex) |
| 3797 | { |
| 3798 | struct ifaddrmsg *ifm; |
| 3799 | |
| 3800 | ifm = nlmsg_data(nlh); |
| 3801 | ifm->ifa_family = AF_INET6; |
| 3802 | ifm->ifa_prefixlen = prefixlen; |
| 3803 | ifm->ifa_flags = flags; |
| 3804 | ifm->ifa_scope = scope; |
| 3805 | ifm->ifa_index = ifindex; |
| 3806 | } |
| 3807 | |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3808 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
| 3809 | unsigned long tstamp, u32 preferred, u32 valid) |
| 3810 | { |
| 3811 | struct ifa_cacheinfo ci; |
| 3812 | |
Thomas Graf | 18a31e1 | 2010-11-17 04:12:02 +0000 | [diff] [blame] | 3813 | ci.cstamp = cstamp_delta(cstamp); |
| 3814 | ci.tstamp = cstamp_delta(tstamp); |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3815 | ci.ifa_prefered = preferred; |
| 3816 | ci.ifa_valid = valid; |
| 3817 | |
| 3818 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); |
| 3819 | } |
| 3820 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3821 | static inline int rt_scope(int ifa_scope) |
| 3822 | { |
| 3823 | if (ifa_scope & IFA_HOST) |
| 3824 | return RT_SCOPE_HOST; |
| 3825 | else if (ifa_scope & IFA_LINK) |
| 3826 | return RT_SCOPE_LINK; |
| 3827 | else if (ifa_scope & IFA_SITE) |
| 3828 | return RT_SCOPE_SITE; |
| 3829 | else |
| 3830 | return RT_SCOPE_UNIVERSE; |
| 3831 | } |
| 3832 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3833 | static inline int inet6_ifaddr_msgsize(void) |
| 3834 | { |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 3835 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 3836 | + nla_total_size(16) /* IFA_LOCAL */ |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 3837 | + nla_total_size(16) /* IFA_ADDRESS */ |
| 3838 | + nla_total_size(sizeof(struct ifa_cacheinfo)); |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3839 | } |
YOSHIFUJI Hideaki | c5396a3 | 2006-06-17 22:48:48 -0700 | [diff] [blame] | 3840 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3841 | 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] | 3842 | u32 portid, u32 seq, int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3843 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3844 | struct nlmsghdr *nlh; |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3845 | u32 preferred, valid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3846 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3847 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3848 | if (nlh == NULL) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3849 | return -EMSGSIZE; |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3850 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3851 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
| 3852 | ifa->idev->dev->ifindex); |
| 3853 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3854 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3855 | preferred = ifa->prefered_lft; |
| 3856 | valid = ifa->valid_lft; |
| 3857 | if (preferred != INFINITY_LIFE_TIME) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3858 | long tval = (jiffies - ifa->tstamp)/HZ; |
Jens Rosenboom | a1faa69 | 2009-06-25 04:55:50 +0000 | [diff] [blame] | 3859 | if (preferred > tval) |
| 3860 | preferred -= tval; |
| 3861 | else |
| 3862 | preferred = 0; |
Ben Hutchings | f56619f | 2010-06-26 11:37:47 +0000 | [diff] [blame] | 3863 | if (valid != INFINITY_LIFE_TIME) { |
| 3864 | if (valid > tval) |
| 3865 | valid -= tval; |
| 3866 | else |
| 3867 | valid = 0; |
| 3868 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3869 | } |
| 3870 | } else { |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3871 | preferred = INFINITY_LIFE_TIME; |
| 3872 | valid = INFINITY_LIFE_TIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3873 | } |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3874 | |
Cong Wang | 7996c79 | 2013-05-22 05:41:06 +0000 | [diff] [blame] | 3875 | if (!ipv6_addr_any(&ifa->peer_addr)) { |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 3876 | if (nla_put(skb, IFA_LOCAL, 16, &ifa->addr) < 0 || |
| 3877 | nla_put(skb, IFA_ADDRESS, 16, &ifa->peer_addr) < 0) |
| 3878 | goto error; |
| 3879 | } else |
| 3880 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0) |
| 3881 | goto error; |
| 3882 | |
| 3883 | if (put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) |
| 3884 | goto error; |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3885 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3886 | return nlmsg_end(skb, nlh); |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 3887 | |
| 3888 | error: |
| 3889 | nlmsg_cancel(skb, nlh); |
| 3890 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3891 | } |
| 3892 | |
| 3893 | 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] | 3894 | u32 portid, u32 seq, int event, u16 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3895 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3896 | struct nlmsghdr *nlh; |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3897 | u8 scope = RT_SCOPE_UNIVERSE; |
| 3898 | int ifindex = ifmca->idev->dev->ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3899 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3900 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) |
| 3901 | scope = RT_SCOPE_SITE; |
| 3902 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3903 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3904 | if (nlh == NULL) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3905 | return -EMSGSIZE; |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3906 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3907 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3908 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || |
| 3909 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3910 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
| 3911 | nlmsg_cancel(skb, nlh); |
| 3912 | return -EMSGSIZE; |
| 3913 | } |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3914 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3915 | return nlmsg_end(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3916 | } |
| 3917 | |
| 3918 | 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] | 3919 | u32 portid, u32 seq, int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3920 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3921 | struct nlmsghdr *nlh; |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3922 | u8 scope = RT_SCOPE_UNIVERSE; |
| 3923 | int ifindex = ifaca->aca_idev->dev->ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3924 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3925 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) |
| 3926 | scope = RT_SCOPE_SITE; |
| 3927 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3928 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3929 | if (nlh == NULL) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3930 | return -EMSGSIZE; |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3931 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3932 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3933 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || |
| 3934 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3935 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
| 3936 | nlmsg_cancel(skb, nlh); |
| 3937 | return -EMSGSIZE; |
| 3938 | } |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3939 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3940 | return nlmsg_end(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3941 | } |
| 3942 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 3943 | enum addr_type_t { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3944 | UNICAST_ADDR, |
| 3945 | MULTICAST_ADDR, |
| 3946 | ANYCAST_ADDR, |
| 3947 | }; |
| 3948 | |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 3949 | /* called with rcu_read_lock() */ |
| 3950 | static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb, |
| 3951 | struct netlink_callback *cb, enum addr_type_t type, |
| 3952 | int s_ip_idx, int *p_ip_idx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3953 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3954 | struct ifmcaddr6 *ifmca; |
| 3955 | struct ifacaddr6 *ifaca; |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 3956 | int err = 1; |
| 3957 | int ip_idx = *p_ip_idx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3958 | |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 3959 | read_lock_bh(&idev->lock); |
| 3960 | switch (type) { |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 3961 | case UNICAST_ADDR: { |
| 3962 | struct inet6_ifaddr *ifa; |
| 3963 | |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 3964 | /* unicast address incl. temp addr */ |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 3965 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
| 3966 | if (++ip_idx < s_ip_idx) |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 3967 | continue; |
| 3968 | err = inet6_fill_ifaddr(skb, ifa, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3969 | NETLINK_CB(cb->skb).portid, |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 3970 | cb->nlh->nlmsg_seq, |
| 3971 | RTM_NEWADDR, |
| 3972 | NLM_F_MULTI); |
| 3973 | if (err <= 0) |
| 3974 | break; |
Nicolas Dichtel | 63998ac | 2013-03-22 06:28:43 +0000 | [diff] [blame] | 3975 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3976 | } |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 3977 | break; |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 3978 | } |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 3979 | case MULTICAST_ADDR: |
| 3980 | /* multicast address */ |
| 3981 | for (ifmca = idev->mc_list; ifmca; |
| 3982 | ifmca = ifmca->next, ip_idx++) { |
| 3983 | if (ip_idx < s_ip_idx) |
| 3984 | continue; |
| 3985 | err = inet6_fill_ifmcaddr(skb, ifmca, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3986 | NETLINK_CB(cb->skb).portid, |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 3987 | cb->nlh->nlmsg_seq, |
| 3988 | RTM_GETMULTICAST, |
| 3989 | NLM_F_MULTI); |
| 3990 | if (err <= 0) |
| 3991 | break; |
| 3992 | } |
| 3993 | break; |
| 3994 | case ANYCAST_ADDR: |
| 3995 | /* anycast address */ |
| 3996 | for (ifaca = idev->ac_list; ifaca; |
| 3997 | ifaca = ifaca->aca_next, ip_idx++) { |
| 3998 | if (ip_idx < s_ip_idx) |
| 3999 | continue; |
| 4000 | err = inet6_fill_ifacaddr(skb, ifaca, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 4001 | NETLINK_CB(cb->skb).portid, |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4002 | cb->nlh->nlmsg_seq, |
| 4003 | RTM_GETANYCAST, |
| 4004 | NLM_F_MULTI); |
| 4005 | if (err <= 0) |
| 4006 | break; |
| 4007 | } |
| 4008 | break; |
| 4009 | default: |
| 4010 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4011 | } |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4012 | read_unlock_bh(&idev->lock); |
| 4013 | *p_ip_idx = ip_idx; |
| 4014 | return err; |
| 4015 | } |
| 4016 | |
| 4017 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, |
| 4018 | enum addr_type_t type) |
| 4019 | { |
| 4020 | struct net *net = sock_net(skb->sk); |
| 4021 | int h, s_h; |
| 4022 | int idx, ip_idx; |
| 4023 | int s_idx, s_ip_idx; |
| 4024 | struct net_device *dev; |
| 4025 | struct inet6_dev *idev; |
| 4026 | struct hlist_head *head; |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4027 | |
| 4028 | s_h = cb->args[0]; |
| 4029 | s_idx = idx = cb->args[1]; |
| 4030 | s_ip_idx = ip_idx = cb->args[2]; |
| 4031 | |
| 4032 | rcu_read_lock(); |
Nicolas Dichtel | 63998ac | 2013-03-22 06:28:43 +0000 | [diff] [blame] | 4033 | 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] | 4034 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
| 4035 | idx = 0; |
| 4036 | head = &net->dev_index_head[h]; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 4037 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4038 | if (idx < s_idx) |
| 4039 | goto cont; |
Patrick McHardy | 4b97efd | 2010-03-26 20:27:49 -0700 | [diff] [blame] | 4040 | if (h > s_h || idx > s_idx) |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4041 | s_ip_idx = 0; |
| 4042 | ip_idx = 0; |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4043 | idev = __in6_dev_get(dev); |
| 4044 | if (!idev) |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 4045 | goto cont; |
| 4046 | |
| 4047 | if (in6_dump_addrs(idev, skb, cb, type, |
| 4048 | s_ip_idx, &ip_idx) <= 0) |
| 4049 | goto done; |
| 4050 | cont: |
| 4051 | idx++; |
| 4052 | } |
| 4053 | } |
| 4054 | done: |
| 4055 | rcu_read_unlock(); |
| 4056 | cb->args[0] = h; |
| 4057 | cb->args[1] = idx; |
| 4058 | cb->args[2] = ip_idx; |
| 4059 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4060 | return skb->len; |
| 4061 | } |
| 4062 | |
| 4063 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) |
| 4064 | { |
| 4065 | enum addr_type_t type = UNICAST_ADDR; |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 4066 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4067 | return inet6_dump_addr(skb, cb, type); |
| 4068 | } |
| 4069 | |
| 4070 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) |
| 4071 | { |
| 4072 | enum addr_type_t type = MULTICAST_ADDR; |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 4073 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4074 | return inet6_dump_addr(skb, cb, type); |
| 4075 | } |
| 4076 | |
| 4077 | |
| 4078 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) |
| 4079 | { |
| 4080 | enum addr_type_t type = ANYCAST_ADDR; |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 4081 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4082 | return inet6_dump_addr(skb, cb, type); |
| 4083 | } |
| 4084 | |
Thomas Graf | 661d296 | 2013-03-21 07:45:29 +0000 | [diff] [blame] | 4085 | 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] | 4086 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 4087 | struct net *net = sock_net(in_skb->sk); |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 4088 | struct ifaddrmsg *ifm; |
| 4089 | struct nlattr *tb[IFA_MAX+1]; |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4090 | struct in6_addr *addr = NULL, *peer; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4091 | struct net_device *dev = NULL; |
| 4092 | struct inet6_ifaddr *ifa; |
| 4093 | struct sk_buff *skb; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4094 | int err; |
| 4095 | |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 4096 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
| 4097 | if (err < 0) |
| 4098 | goto errout; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4099 | |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4100 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer); |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 4101 | if (addr == NULL) { |
| 4102 | err = -EINVAL; |
| 4103 | goto errout; |
| 4104 | } |
| 4105 | |
| 4106 | ifm = nlmsg_data(nlh); |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4107 | if (ifm->ifa_index) |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 4108 | dev = __dev_get_by_index(net, ifm->ifa_index); |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4109 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4110 | ifa = ipv6_get_ifaddr(net, addr, dev, 1); |
| 4111 | if (!ifa) { |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 4112 | err = -EADDRNOTAVAIL; |
| 4113 | goto errout; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4114 | } |
| 4115 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4116 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL); |
| 4117 | if (!skb) { |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 4118 | err = -ENOBUFS; |
| 4119 | goto errout_ifa; |
| 4120 | } |
| 4121 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 4122 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).portid, |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4123 | nlh->nlmsg_seq, RTM_NEWADDR, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 4124 | if (err < 0) { |
| 4125 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ |
| 4126 | WARN_ON(err == -EMSGSIZE); |
| 4127 | kfree_skb(skb); |
| 4128 | goto errout_ifa; |
| 4129 | } |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 4130 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 4131 | errout_ifa: |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4132 | in6_ifa_put(ifa); |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 4133 | errout: |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4134 | return err; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 4135 | } |
| 4136 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4137 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
| 4138 | { |
| 4139 | struct sk_buff *skb; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 4140 | struct net *net = dev_net(ifa->idev->dev); |
Thomas Graf | 5d62026 | 2006-08-15 00:35:02 -0700 | [diff] [blame] | 4141 | int err = -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4142 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 4143 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
Thomas Graf | 5d62026 | 2006-08-15 00:35:02 -0700 | [diff] [blame] | 4144 | if (skb == NULL) |
| 4145 | goto errout; |
| 4146 | |
| 4147 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 4148 | if (err < 0) { |
| 4149 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ |
| 4150 | WARN_ON(err == -EMSGSIZE); |
| 4151 | kfree_skb(skb); |
| 4152 | goto errout; |
| 4153 | } |
Pablo Neira Ayuso | 1ce85fe | 2009-02-24 23:18:28 -0800 | [diff] [blame] | 4154 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
| 4155 | return; |
Thomas Graf | 5d62026 | 2006-08-15 00:35:02 -0700 | [diff] [blame] | 4156 | errout: |
| 4157 | if (err < 0) |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 4158 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4159 | } |
| 4160 | |
Dave Jones | b6f99a2 | 2007-03-22 12:27:49 -0700 | [diff] [blame] | 4161 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4162 | __s32 *array, int bytes) |
| 4163 | { |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 4164 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
| 4165 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4166 | memset(array, 0, bytes); |
| 4167 | array[DEVCONF_FORWARDING] = cnf->forwarding; |
| 4168 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; |
| 4169 | array[DEVCONF_MTU6] = cnf->mtu6; |
| 4170 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; |
| 4171 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; |
| 4172 | array[DEVCONF_AUTOCONF] = cnf->autoconf; |
| 4173 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; |
| 4174 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; |
Thomas Graf | 93908d1 | 2010-11-17 01:44:24 +0000 | [diff] [blame] | 4175 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = |
| 4176 | jiffies_to_msecs(cnf->rtr_solicit_interval); |
| 4177 | array[DEVCONF_RTR_SOLICIT_DELAY] = |
| 4178 | jiffies_to_msecs(cnf->rtr_solicit_delay); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4179 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; |
| 4180 | #ifdef CONFIG_IPV6_PRIVACY |
| 4181 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; |
| 4182 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; |
| 4183 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; |
| 4184 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; |
| 4185 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; |
| 4186 | #endif |
| 4187 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 4188 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 4189 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 4190 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 4191 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; |
Thomas Graf | 93908d1 | 2010-11-17 01:44:24 +0000 | [diff] [blame] | 4192 | array[DEVCONF_RTR_PROBE_INTERVAL] = |
| 4193 | jiffies_to_msecs(cnf->rtr_probe_interval); |
Neil Horman | fa03ef3 | 2007-01-30 14:30:10 -0800 | [diff] [blame] | 4194 | #ifdef CONFIG_IPV6_ROUTE_INFO |
YOSHIFUJI Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 4195 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
| 4196 | #endif |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 4197 | #endif |
YOSHIFUJI Hideaki | fbea49e | 2006-09-22 14:43:49 -0700 | [diff] [blame] | 4198 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 4199 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 4200 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 4201 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; |
| 4202 | #endif |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 4203 | #ifdef CONFIG_IPV6_MROUTE |
| 4204 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; |
| 4205 | #endif |
YOSHIFUJI Hideaki | 778d80b | 2008-06-28 14:17:11 +0900 | [diff] [blame] | 4206 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 4207 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
Cosmin Ratiu | c3faca0 | 2009-10-09 03:11:14 +0000 | [diff] [blame] | 4208 | array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao; |
Hannes Frederic Sowa | 5cb0443 | 2012-11-06 16:46:20 +0000 | [diff] [blame] | 4209 | array[DEVCONF_NDISC_NOTIFY] = cnf->ndisc_notify; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4210 | } |
| 4211 | |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 4212 | static inline size_t inet6_ifla6_size(void) |
| 4213 | { |
| 4214 | return nla_total_size(4) /* IFLA_INET6_FLAGS */ |
| 4215 | + nla_total_size(sizeof(struct ifla_cacheinfo)) |
| 4216 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ |
| 4217 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 4218 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ |
| 4219 | + nla_total_size(sizeof(struct in6_addr)); /* IFLA_INET6_TOKEN */ |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 4220 | } |
| 4221 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 4222 | static inline size_t inet6_if_nlmsg_size(void) |
| 4223 | { |
| 4224 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) |
| 4225 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ |
| 4226 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ |
| 4227 | + nla_total_size(4) /* IFLA_MTU */ |
| 4228 | + nla_total_size(4) /* IFLA_LINK */ |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 4229 | + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */ |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 4230 | } |
YOSHIFUJI Hideaki | c5396a3 | 2006-06-17 22:48:48 -0700 | [diff] [blame] | 4231 | |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 4232 | static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib, |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 4233 | int items, int bytes) |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 4234 | { |
| 4235 | int i; |
| 4236 | int pad = bytes - sizeof(u64) * items; |
| 4237 | BUG_ON(pad < 0); |
| 4238 | |
| 4239 | /* Use put_unaligned() because stats may not be aligned for u64. */ |
| 4240 | put_unaligned(items, &stats[0]); |
| 4241 | for (i = 1; i < items; i++) |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 4242 | put_unaligned(atomic_long_read(&mib[i]), &stats[i]); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 4243 | |
| 4244 | memset(&stats[items], 0, pad); |
| 4245 | } |
| 4246 | |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 4247 | static inline void __snmp6_fill_stats64(u64 *stats, void __percpu **mib, |
| 4248 | int items, int bytes, size_t syncpoff) |
| 4249 | { |
| 4250 | int i; |
| 4251 | int pad = bytes - sizeof(u64) * items; |
| 4252 | BUG_ON(pad < 0); |
| 4253 | |
| 4254 | /* Use put_unaligned() because stats may not be aligned for u64. */ |
| 4255 | put_unaligned(items, &stats[0]); |
| 4256 | for (i = 1; i < items; i++) |
| 4257 | put_unaligned(snmp_fold_field64(mib, i, syncpoff), &stats[i]); |
| 4258 | |
| 4259 | memset(&stats[items], 0, pad); |
| 4260 | } |
| 4261 | |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 4262 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, |
| 4263 | int bytes) |
| 4264 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4265 | switch (attrtype) { |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 4266 | case IFLA_INET6_STATS: |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 4267 | __snmp6_fill_stats64(stats, (void __percpu **)idev->stats.ipv6, |
| 4268 | IPSTATS_MIB_MAX, bytes, offsetof(struct ipstats_mib, syncp)); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 4269 | break; |
| 4270 | case IFLA_INET6_ICMP6STATS: |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 4271 | __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, ICMP6_MIB_MAX, bytes); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 4272 | break; |
| 4273 | } |
| 4274 | } |
| 4275 | |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 4276 | static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4277 | { |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 4278 | struct nlattr *nla; |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 4279 | struct ifla_cacheinfo ci; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4280 | |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 4281 | if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags)) |
| 4282 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4283 | ci.max_reasm_len = IPV6_MAXPLEN; |
David S. Miller | 2491242 | 2010-11-19 13:13:47 -0800 | [diff] [blame] | 4284 | ci.tstamp = cstamp_delta(idev->tstamp); |
| 4285 | ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time); |
| 4286 | ci.retrans_time = jiffies_to_msecs(idev->nd_parms->retrans_time); |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 4287 | if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci)) |
| 4288 | goto nla_put_failure; |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 4289 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
| 4290 | if (nla == NULL) |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 4291 | goto nla_put_failure; |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 4292 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4293 | |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 4294 | /* XXX - MC not implemented */ |
| 4295 | |
| 4296 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); |
| 4297 | if (nla == NULL) |
| 4298 | goto nla_put_failure; |
| 4299 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); |
| 4300 | |
| 4301 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); |
| 4302 | if (nla == NULL) |
| 4303 | goto nla_put_failure; |
| 4304 | 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] | 4305 | |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 4306 | nla = nla_reserve(skb, IFLA_INET6_TOKEN, sizeof(struct in6_addr)); |
| 4307 | if (nla == NULL) |
| 4308 | goto nla_put_failure; |
| 4309 | read_lock_bh(&idev->lock); |
| 4310 | memcpy(nla_data(nla), idev->token.s6_addr, nla_len(nla)); |
| 4311 | read_unlock_bh(&idev->lock); |
| 4312 | |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 4313 | return 0; |
| 4314 | |
| 4315 | nla_put_failure: |
| 4316 | return -EMSGSIZE; |
| 4317 | } |
| 4318 | |
| 4319 | static size_t inet6_get_link_af_size(const struct net_device *dev) |
| 4320 | { |
| 4321 | if (!__in6_dev_get(dev)) |
| 4322 | return 0; |
| 4323 | |
| 4324 | return inet6_ifla6_size(); |
| 4325 | } |
| 4326 | |
| 4327 | static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev) |
| 4328 | { |
| 4329 | struct inet6_dev *idev = __in6_dev_get(dev); |
| 4330 | |
| 4331 | if (!idev) |
| 4332 | return -ENODATA; |
| 4333 | |
| 4334 | if (inet6_fill_ifla6_attrs(skb, idev) < 0) |
| 4335 | return -EMSGSIZE; |
| 4336 | |
| 4337 | return 0; |
| 4338 | } |
| 4339 | |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 4340 | static int inet6_set_iftoken(struct inet6_dev *idev, struct in6_addr *token) |
| 4341 | { |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 4342 | struct inet6_ifaddr *ifp; |
| 4343 | struct net_device *dev = idev->dev; |
Daniel Borkmann | fc40383 | 2013-04-09 03:47:15 +0000 | [diff] [blame] | 4344 | bool update_rs = false; |
Hannes Frederic Sowa | dc84829 | 2013-06-24 21:42:40 +0200 | [diff] [blame] | 4345 | struct in6_addr ll_addr; |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 4346 | |
| 4347 | if (token == NULL) |
| 4348 | return -EINVAL; |
| 4349 | if (ipv6_addr_any(token)) |
| 4350 | return -EINVAL; |
| 4351 | if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) |
| 4352 | return -EINVAL; |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 4353 | if (!ipv6_accept_ra(idev)) |
| 4354 | return -EINVAL; |
| 4355 | if (idev->cnf.rtr_solicits <= 0) |
| 4356 | return -EINVAL; |
| 4357 | |
| 4358 | write_lock_bh(&idev->lock); |
| 4359 | |
| 4360 | BUILD_BUG_ON(sizeof(token->s6_addr) != 16); |
| 4361 | memcpy(idev->token.s6_addr + 8, token->s6_addr + 8, 8); |
| 4362 | |
| 4363 | write_unlock_bh(&idev->lock); |
| 4364 | |
Hannes Frederic Sowa | dc84829 | 2013-06-24 21:42:40 +0200 | [diff] [blame] | 4365 | if (!idev->dead && (idev->if_flags & IF_READY) && |
| 4366 | !ipv6_get_lladdr(dev, &ll_addr, IFA_F_TENTATIVE | |
| 4367 | IFA_F_OPTIMISTIC)) { |
Daniel Borkmann | fc40383 | 2013-04-09 03:47:15 +0000 | [diff] [blame] | 4368 | |
| 4369 | /* If we're not ready, then normal ifup will take care |
| 4370 | * of this. Otherwise, we need to request our rs here. |
| 4371 | */ |
| 4372 | ndisc_send_rs(dev, &ll_addr, &in6addr_linklocal_allrouters); |
| 4373 | update_rs = true; |
| 4374 | } |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 4375 | |
| 4376 | write_lock_bh(&idev->lock); |
Daniel Borkmann | fc40383 | 2013-04-09 03:47:15 +0000 | [diff] [blame] | 4377 | |
Hannes Frederic Sowa | 77ecaac | 2013-06-26 03:41:49 +0200 | [diff] [blame] | 4378 | if (update_rs) { |
Daniel Borkmann | fc40383 | 2013-04-09 03:47:15 +0000 | [diff] [blame] | 4379 | idev->if_flags |= IF_RS_SENT; |
Hannes Frederic Sowa | 77ecaac | 2013-06-26 03:41:49 +0200 | [diff] [blame] | 4380 | idev->rs_probes = 1; |
| 4381 | addrconf_mod_rs_timer(idev, idev->cnf.rtr_solicit_interval); |
| 4382 | } |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 4383 | |
| 4384 | /* Well, that's kinda nasty ... */ |
| 4385 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
| 4386 | spin_lock(&ifp->lock); |
Daniel Borkmann | 617fe29 | 2013-04-09 03:47:16 +0000 | [diff] [blame] | 4387 | if (ifp->tokenized) { |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 4388 | ifp->valid_lft = 0; |
| 4389 | ifp->prefered_lft = 0; |
| 4390 | } |
| 4391 | spin_unlock(&ifp->lock); |
| 4392 | } |
| 4393 | |
| 4394 | write_unlock_bh(&idev->lock); |
Hannes Frederic Sowa | 2b9651d | 2013-06-24 22:03:28 +0200 | [diff] [blame] | 4395 | addrconf_verify(0); |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 4396 | return 0; |
| 4397 | } |
| 4398 | |
| 4399 | static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla) |
| 4400 | { |
| 4401 | int err = -EINVAL; |
| 4402 | struct inet6_dev *idev = __in6_dev_get(dev); |
| 4403 | struct nlattr *tb[IFLA_INET6_MAX + 1]; |
| 4404 | |
| 4405 | if (!idev) |
| 4406 | return -EAFNOSUPPORT; |
| 4407 | |
| 4408 | if (nla_parse_nested(tb, IFLA_INET6_MAX, nla, NULL) < 0) |
| 4409 | BUG(); |
| 4410 | |
| 4411 | if (tb[IFLA_INET6_TOKEN]) |
| 4412 | err = inet6_set_iftoken(idev, nla_data(tb[IFLA_INET6_TOKEN])); |
| 4413 | |
| 4414 | return err; |
| 4415 | } |
| 4416 | |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 4417 | 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] | 4418 | u32 portid, u32 seq, int event, unsigned int flags) |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 4419 | { |
| 4420 | struct net_device *dev = idev->dev; |
| 4421 | struct ifinfomsg *hdr; |
| 4422 | struct nlmsghdr *nlh; |
| 4423 | void *protoinfo; |
| 4424 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 4425 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*hdr), flags); |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 4426 | if (nlh == NULL) |
| 4427 | return -EMSGSIZE; |
| 4428 | |
| 4429 | hdr = nlmsg_data(nlh); |
| 4430 | hdr->ifi_family = AF_INET6; |
| 4431 | hdr->__ifi_pad = 0; |
| 4432 | hdr->ifi_type = dev->type; |
| 4433 | hdr->ifi_index = dev->ifindex; |
| 4434 | hdr->ifi_flags = dev_get_flags(dev); |
| 4435 | hdr->ifi_change = 0; |
| 4436 | |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 4437 | if (nla_put_string(skb, IFLA_IFNAME, dev->name) || |
| 4438 | (dev->addr_len && |
| 4439 | nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || |
| 4440 | nla_put_u32(skb, IFLA_MTU, dev->mtu) || |
| 4441 | (dev->ifindex != dev->iflink && |
| 4442 | nla_put_u32(skb, IFLA_LINK, dev->iflink))) |
| 4443 | goto nla_put_failure; |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 4444 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
| 4445 | if (protoinfo == NULL) |
| 4446 | goto nla_put_failure; |
| 4447 | |
| 4448 | if (inet6_fill_ifla6_attrs(skb, idev) < 0) |
| 4449 | goto nla_put_failure; |
| 4450 | |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 4451 | nla_nest_end(skb, protoinfo); |
| 4452 | return nlmsg_end(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4453 | |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 4454 | nla_put_failure: |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 4455 | nlmsg_cancel(skb, nlh); |
| 4456 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4457 | } |
| 4458 | |
| 4459 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) |
| 4460 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 4461 | struct net *net = sock_net(skb->sk); |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 4462 | int h, s_h; |
David S. Miller | 434a8a58 | 2009-11-11 18:53:00 -0800 | [diff] [blame] | 4463 | int idx = 0, s_idx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4464 | struct net_device *dev; |
| 4465 | struct inet6_dev *idev; |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 4466 | struct hlist_head *head; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4467 | |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 4468 | s_h = cb->args[0]; |
| 4469 | s_idx = cb->args[1]; |
| 4470 | |
| 4471 | rcu_read_lock(); |
| 4472 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
| 4473 | idx = 0; |
| 4474 | head = &net->dev_index_head[h]; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 4475 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 4476 | if (idx < s_idx) |
| 4477 | goto cont; |
| 4478 | idev = __in6_dev_get(dev); |
| 4479 | if (!idev) |
| 4480 | goto cont; |
| 4481 | if (inet6_fill_ifinfo(skb, idev, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 4482 | NETLINK_CB(cb->skb).portid, |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 4483 | cb->nlh->nlmsg_seq, |
| 4484 | RTM_NEWLINK, NLM_F_MULTI) <= 0) |
| 4485 | goto out; |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 4486 | cont: |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 4487 | idx++; |
| 4488 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4489 | } |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 4490 | out: |
| 4491 | rcu_read_unlock(); |
| 4492 | cb->args[1] = idx; |
| 4493 | cb->args[0] = h; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4494 | |
| 4495 | return skb->len; |
| 4496 | } |
| 4497 | |
| 4498 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) |
| 4499 | { |
| 4500 | struct sk_buff *skb; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 4501 | struct net *net = dev_net(idev->dev); |
Thomas Graf | 8d7a76c | 2006-08-15 00:35:47 -0700 | [diff] [blame] | 4502 | int err = -ENOBUFS; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4503 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 4504 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
Thomas Graf | 8d7a76c | 2006-08-15 00:35:47 -0700 | [diff] [blame] | 4505 | if (skb == NULL) |
| 4506 | goto errout; |
| 4507 | |
| 4508 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 4509 | if (err < 0) { |
| 4510 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ |
| 4511 | WARN_ON(err == -EMSGSIZE); |
| 4512 | kfree_skb(skb); |
| 4513 | goto errout; |
| 4514 | } |
Nicolas Dichtel | 5f75a10 | 2010-12-07 23:38:31 +0000 | [diff] [blame] | 4515 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC); |
Pablo Neira Ayuso | 1ce85fe | 2009-02-24 23:18:28 -0800 | [diff] [blame] | 4516 | return; |
Thomas Graf | 8d7a76c | 2006-08-15 00:35:47 -0700 | [diff] [blame] | 4517 | errout: |
| 4518 | if (err < 0) |
Nicolas Dichtel | 5f75a10 | 2010-12-07 23:38:31 +0000 | [diff] [blame] | 4519 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4520 | } |
| 4521 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 4522 | static inline size_t inet6_prefix_nlmsg_size(void) |
| 4523 | { |
| 4524 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) |
| 4525 | + nla_total_size(sizeof(struct in6_addr)) |
| 4526 | + nla_total_size(sizeof(struct prefix_cacheinfo)); |
| 4527 | } |
YOSHIFUJI Hideaki | c5396a3 | 2006-06-17 22:48:48 -0700 | [diff] [blame] | 4528 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4529 | 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] | 4530 | struct prefix_info *pinfo, u32 portid, u32 seq, |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 4531 | int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4532 | { |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 4533 | struct prefixmsg *pmsg; |
| 4534 | struct nlmsghdr *nlh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4535 | struct prefix_cacheinfo ci; |
| 4536 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 4537 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*pmsg), flags); |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 4538 | if (nlh == NULL) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 4539 | return -EMSGSIZE; |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 4540 | |
| 4541 | pmsg = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4542 | pmsg->prefix_family = AF_INET6; |
Patrick McHardy | 8a47077 | 2005-06-28 12:56:45 -0700 | [diff] [blame] | 4543 | pmsg->prefix_pad1 = 0; |
| 4544 | pmsg->prefix_pad2 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4545 | pmsg->prefix_ifindex = idev->dev->ifindex; |
| 4546 | pmsg->prefix_len = pinfo->prefix_len; |
| 4547 | pmsg->prefix_type = pinfo->type; |
Patrick McHardy | 8a47077 | 2005-06-28 12:56:45 -0700 | [diff] [blame] | 4548 | pmsg->prefix_pad3 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4549 | pmsg->prefix_flags = 0; |
| 4550 | if (pinfo->onlink) |
| 4551 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; |
| 4552 | if (pinfo->autoconf) |
| 4553 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; |
| 4554 | |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 4555 | if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix)) |
| 4556 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4557 | ci.preferred_time = ntohl(pinfo->prefered); |
| 4558 | ci.valid_time = ntohl(pinfo->valid); |
David S. Miller | c78679e | 2012-04-01 20:27:33 -0400 | [diff] [blame] | 4559 | if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci)) |
| 4560 | goto nla_put_failure; |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 4561 | return nlmsg_end(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4562 | |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 4563 | nla_put_failure: |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 4564 | nlmsg_cancel(skb, nlh); |
| 4565 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4566 | } |
| 4567 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4568 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4569 | struct prefix_info *pinfo) |
| 4570 | { |
| 4571 | struct sk_buff *skb; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 4572 | struct net *net = dev_net(idev->dev); |
Thomas Graf | 8c384bfa | 2006-08-15 00:36:07 -0700 | [diff] [blame] | 4573 | int err = -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4574 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 4575 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
Thomas Graf | 8c384bfa | 2006-08-15 00:36:07 -0700 | [diff] [blame] | 4576 | if (skb == NULL) |
| 4577 | goto errout; |
| 4578 | |
| 4579 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 4580 | if (err < 0) { |
| 4581 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ |
| 4582 | WARN_ON(err == -EMSGSIZE); |
| 4583 | kfree_skb(skb); |
| 4584 | goto errout; |
| 4585 | } |
Pablo Neira Ayuso | 1ce85fe | 2009-02-24 23:18:28 -0800 | [diff] [blame] | 4586 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
| 4587 | return; |
Thomas Graf | 8c384bfa | 2006-08-15 00:36:07 -0700 | [diff] [blame] | 4588 | errout: |
| 4589 | if (err < 0) |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 4590 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4591 | } |
| 4592 | |
Hannes Frederic Sowa | 1ec047e | 2013-06-27 00:06:56 +0200 | [diff] [blame] | 4593 | static void update_valid_ll_addr_cnt(struct inet6_ifaddr *ifp, int count) |
| 4594 | { |
| 4595 | write_lock_bh(&ifp->idev->lock); |
| 4596 | spin_lock(&ifp->lock); |
| 4597 | if (((ifp->flags & (IFA_F_PERMANENT|IFA_F_TENTATIVE|IFA_F_OPTIMISTIC| |
| 4598 | IFA_F_DADFAILED)) == IFA_F_PERMANENT) && |
| 4599 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) |
| 4600 | ifp->idev->valid_ll_addr_cnt += count; |
| 4601 | WARN_ON(ifp->idev->valid_ll_addr_cnt < 0); |
| 4602 | spin_unlock(&ifp->lock); |
| 4603 | write_unlock_bh(&ifp->idev->lock); |
| 4604 | } |
| 4605 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4606 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
| 4607 | { |
Nicolas Dichtel | 63998ac | 2013-03-22 06:28:43 +0000 | [diff] [blame] | 4608 | struct net *net = dev_net(ifp->idev->dev); |
| 4609 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4610 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); |
| 4611 | |
| 4612 | switch (event) { |
| 4613 | case RTM_NEWADDR: |
Hannes Frederic Sowa | 1ec047e | 2013-06-27 00:06:56 +0200 | [diff] [blame] | 4614 | update_valid_ll_addr_cnt(ifp, 1); |
| 4615 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 4616 | /* |
| 4617 | * If the address was optimistic |
| 4618 | * we inserted the route at the start of |
| 4619 | * our DAD process, so we don't need |
| 4620 | * to do it again |
| 4621 | */ |
| 4622 | if (!(ifp->rt->rt6i_node)) |
| 4623 | ip6_ins_rt(ifp->rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4624 | if (ifp->idev->cnf.forwarding) |
| 4625 | addrconf_join_anycast(ifp); |
Cong Wang | 7996c79 | 2013-05-22 05:41:06 +0000 | [diff] [blame] | 4626 | if (!ipv6_addr_any(&ifp->peer_addr)) |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4627 | addrconf_prefix_route(&ifp->peer_addr, 128, |
| 4628 | ifp->idev->dev, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4629 | break; |
| 4630 | case RTM_DELADDR: |
Hannes Frederic Sowa | 1ec047e | 2013-06-27 00:06:56 +0200 | [diff] [blame] | 4631 | update_valid_ll_addr_cnt(ifp, -1); |
| 4632 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4633 | if (ifp->idev->cnf.forwarding) |
| 4634 | addrconf_leave_anycast(ifp); |
| 4635 | addrconf_leave_solict(ifp->idev, &ifp->addr); |
Cong Wang | 7996c79 | 2013-05-22 05:41:06 +0000 | [diff] [blame] | 4636 | if (!ipv6_addr_any(&ifp->peer_addr)) { |
Nicolas Dichtel | caeaba7 | 2013-05-16 22:32:00 +0000 | [diff] [blame] | 4637 | struct rt6_info *rt; |
| 4638 | struct net_device *dev = ifp->idev->dev; |
| 4639 | |
| 4640 | rt = rt6_lookup(dev_net(dev), &ifp->peer_addr, NULL, |
| 4641 | dev->ifindex, 1); |
| 4642 | if (rt) { |
| 4643 | dst_hold(&rt->dst); |
| 4644 | if (ip6_del_rt(rt)) |
| 4645 | dst_free(&rt->dst); |
| 4646 | } |
| 4647 | } |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 4648 | dst_hold(&ifp->rt->dst); |
stephen hemminger | 93fa159 | 2010-04-12 05:41:31 +0000 | [diff] [blame] | 4649 | |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 4650 | if (ip6_del_rt(ifp->rt)) |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 4651 | dst_free(&ifp->rt->dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4652 | break; |
| 4653 | } |
Nicolas Dichtel | 63998ac | 2013-03-22 06:28:43 +0000 | [diff] [blame] | 4654 | atomic_inc(&net->ipv6.dev_addr_genid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4655 | } |
| 4656 | |
| 4657 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
| 4658 | { |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 4659 | rcu_read_lock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4660 | if (likely(ifp->idev->dead == 0)) |
| 4661 | __ipv6_ifa_notify(event, ifp); |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 4662 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4663 | } |
| 4664 | |
| 4665 | #ifdef CONFIG_SYSCTL |
| 4666 | |
| 4667 | static |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 4668 | int addrconf_sysctl_forward(struct ctl_table *ctl, int write, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4669 | void __user *buffer, size_t *lenp, loff_t *ppos) |
| 4670 | { |
| 4671 | int *valp = ctl->data; |
| 4672 | int val = *valp; |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 4673 | loff_t pos = *ppos; |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 4674 | struct ctl_table lctl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4675 | int ret; |
| 4676 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 4677 | /* |
| 4678 | * ctl->data points to idev->cnf.forwarding, we should |
| 4679 | * not modify it until we get the rtnl lock. |
| 4680 | */ |
| 4681 | lctl = *ctl; |
| 4682 | lctl.data = &val; |
| 4683 | |
| 4684 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4685 | |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 4686 | if (write) |
Stephen Hemminger | b325fdd | 2009-02-26 06:55:31 +0000 | [diff] [blame] | 4687 | ret = addrconf_fixup_forwarding(ctl, valp, val); |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 4688 | if (ret) |
| 4689 | *ppos = pos; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4690 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4691 | } |
| 4692 | |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4693 | static void dev_disable_change(struct inet6_dev *idev) |
| 4694 | { |
Cong Wang | 75538c2 | 2013-05-29 11:30:50 +0800 | [diff] [blame] | 4695 | struct netdev_notifier_info info; |
| 4696 | |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4697 | if (!idev || !idev->dev) |
| 4698 | return; |
| 4699 | |
Cong Wang | 75538c2 | 2013-05-29 11:30:50 +0800 | [diff] [blame] | 4700 | netdev_notifier_info_init(&info, idev->dev); |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4701 | if (idev->cnf.disable_ipv6) |
Cong Wang | 75538c2 | 2013-05-29 11:30:50 +0800 | [diff] [blame] | 4702 | addrconf_notify(NULL, NETDEV_DOWN, &info); |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4703 | else |
Cong Wang | 75538c2 | 2013-05-29 11:30:50 +0800 | [diff] [blame] | 4704 | addrconf_notify(NULL, NETDEV_UP, &info); |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4705 | } |
| 4706 | |
| 4707 | static void addrconf_disable_change(struct net *net, __s32 newf) |
| 4708 | { |
| 4709 | struct net_device *dev; |
| 4710 | struct inet6_dev *idev; |
| 4711 | |
Eric Dumazet | c6d14c8 | 2009-11-04 05:43:23 -0800 | [diff] [blame] | 4712 | rcu_read_lock(); |
| 4713 | for_each_netdev_rcu(net, dev) { |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4714 | idev = __in6_dev_get(dev); |
| 4715 | if (idev) { |
| 4716 | int changed = (!idev->cnf.disable_ipv6) ^ (!newf); |
| 4717 | idev->cnf.disable_ipv6 = newf; |
| 4718 | if (changed) |
| 4719 | dev_disable_change(idev); |
| 4720 | } |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4721 | } |
Eric Dumazet | c6d14c8 | 2009-11-04 05:43:23 -0800 | [diff] [blame] | 4722 | rcu_read_unlock(); |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4723 | } |
| 4724 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 4725 | 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] | 4726 | { |
| 4727 | struct net *net; |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 4728 | int old; |
| 4729 | |
| 4730 | if (!rtnl_trylock()) |
| 4731 | return restart_syscall(); |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4732 | |
| 4733 | net = (struct net *)table->extra2; |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 4734 | old = *p; |
| 4735 | *p = newf; |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4736 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 4737 | if (p == &net->ipv6.devconf_dflt->disable_ipv6) { |
| 4738 | rtnl_unlock(); |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4739 | return 0; |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 4740 | } |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4741 | |
| 4742 | if (p == &net->ipv6.devconf_all->disable_ipv6) { |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4743 | net->ipv6.devconf_dflt->disable_ipv6 = newf; |
| 4744 | addrconf_disable_change(net, newf); |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 4745 | } else if ((!newf) ^ (!old)) |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4746 | dev_disable_change((struct inet6_dev *)table->extra1); |
| 4747 | |
| 4748 | rtnl_unlock(); |
| 4749 | return 0; |
| 4750 | } |
| 4751 | |
| 4752 | static |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 4753 | int addrconf_sysctl_disable(struct ctl_table *ctl, int write, |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4754 | void __user *buffer, size_t *lenp, loff_t *ppos) |
| 4755 | { |
| 4756 | int *valp = ctl->data; |
| 4757 | int val = *valp; |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 4758 | loff_t pos = *ppos; |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 4759 | struct ctl_table lctl; |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4760 | int ret; |
| 4761 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 4762 | /* |
| 4763 | * ctl->data points to idev->cnf.disable_ipv6, we should |
| 4764 | * not modify it until we get the rtnl lock. |
| 4765 | */ |
| 4766 | lctl = *ctl; |
| 4767 | lctl.data = &val; |
| 4768 | |
| 4769 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4770 | |
| 4771 | if (write) |
| 4772 | ret = addrconf_disable_ipv6(ctl, valp, val); |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 4773 | if (ret) |
| 4774 | *ppos = pos; |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4775 | return ret; |
| 4776 | } |
| 4777 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4778 | static struct addrconf_sysctl_table |
| 4779 | { |
| 4780 | struct ctl_table_header *sysctl_header; |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 4781 | struct ctl_table addrconf_vars[DEVCONF_MAX+1]; |
Brian Haley | ab32ea5 | 2006-09-22 14:15:41 -0700 | [diff] [blame] | 4782 | } addrconf_sysctl __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4783 | .sysctl_header = NULL, |
| 4784 | .addrconf_vars = { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4785 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4786 | .procname = "forwarding", |
| 4787 | .data = &ipv6_devconf.forwarding, |
| 4788 | .maxlen = sizeof(int), |
| 4789 | .mode = 0644, |
| 4790 | .proc_handler = addrconf_sysctl_forward, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4791 | }, |
| 4792 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4793 | .procname = "hop_limit", |
| 4794 | .data = &ipv6_devconf.hop_limit, |
| 4795 | .maxlen = sizeof(int), |
| 4796 | .mode = 0644, |
| 4797 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4798 | }, |
| 4799 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4800 | .procname = "mtu", |
| 4801 | .data = &ipv6_devconf.mtu6, |
| 4802 | .maxlen = sizeof(int), |
| 4803 | .mode = 0644, |
| 4804 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4805 | }, |
| 4806 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4807 | .procname = "accept_ra", |
| 4808 | .data = &ipv6_devconf.accept_ra, |
| 4809 | .maxlen = sizeof(int), |
| 4810 | .mode = 0644, |
| 4811 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4812 | }, |
| 4813 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4814 | .procname = "accept_redirects", |
| 4815 | .data = &ipv6_devconf.accept_redirects, |
| 4816 | .maxlen = sizeof(int), |
| 4817 | .mode = 0644, |
| 4818 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4819 | }, |
| 4820 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4821 | .procname = "autoconf", |
| 4822 | .data = &ipv6_devconf.autoconf, |
| 4823 | .maxlen = sizeof(int), |
| 4824 | .mode = 0644, |
| 4825 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4826 | }, |
| 4827 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4828 | .procname = "dad_transmits", |
| 4829 | .data = &ipv6_devconf.dad_transmits, |
| 4830 | .maxlen = sizeof(int), |
| 4831 | .mode = 0644, |
| 4832 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4833 | }, |
| 4834 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4835 | .procname = "router_solicitations", |
| 4836 | .data = &ipv6_devconf.rtr_solicits, |
| 4837 | .maxlen = sizeof(int), |
| 4838 | .mode = 0644, |
| 4839 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4840 | }, |
| 4841 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4842 | .procname = "router_solicitation_interval", |
| 4843 | .data = &ipv6_devconf.rtr_solicit_interval, |
| 4844 | .maxlen = sizeof(int), |
| 4845 | .mode = 0644, |
| 4846 | .proc_handler = proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4847 | }, |
| 4848 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4849 | .procname = "router_solicitation_delay", |
| 4850 | .data = &ipv6_devconf.rtr_solicit_delay, |
| 4851 | .maxlen = sizeof(int), |
| 4852 | .mode = 0644, |
| 4853 | .proc_handler = proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4854 | }, |
| 4855 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4856 | .procname = "force_mld_version", |
| 4857 | .data = &ipv6_devconf.force_mld_version, |
| 4858 | .maxlen = sizeof(int), |
| 4859 | .mode = 0644, |
| 4860 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4861 | }, |
| 4862 | #ifdef CONFIG_IPV6_PRIVACY |
| 4863 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4864 | .procname = "use_tempaddr", |
| 4865 | .data = &ipv6_devconf.use_tempaddr, |
| 4866 | .maxlen = sizeof(int), |
| 4867 | .mode = 0644, |
| 4868 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4869 | }, |
| 4870 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4871 | .procname = "temp_valid_lft", |
| 4872 | .data = &ipv6_devconf.temp_valid_lft, |
| 4873 | .maxlen = sizeof(int), |
| 4874 | .mode = 0644, |
| 4875 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4876 | }, |
| 4877 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4878 | .procname = "temp_prefered_lft", |
| 4879 | .data = &ipv6_devconf.temp_prefered_lft, |
| 4880 | .maxlen = sizeof(int), |
| 4881 | .mode = 0644, |
| 4882 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4883 | }, |
| 4884 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4885 | .procname = "regen_max_retry", |
| 4886 | .data = &ipv6_devconf.regen_max_retry, |
| 4887 | .maxlen = sizeof(int), |
| 4888 | .mode = 0644, |
| 4889 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4890 | }, |
| 4891 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4892 | .procname = "max_desync_factor", |
| 4893 | .data = &ipv6_devconf.max_desync_factor, |
| 4894 | .maxlen = sizeof(int), |
| 4895 | .mode = 0644, |
| 4896 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4897 | }, |
| 4898 | #endif |
| 4899 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4900 | .procname = "max_addresses", |
| 4901 | .data = &ipv6_devconf.max_addresses, |
| 4902 | .maxlen = sizeof(int), |
| 4903 | .mode = 0644, |
| 4904 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4905 | }, |
| 4906 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4907 | .procname = "accept_ra_defrtr", |
| 4908 | .data = &ipv6_devconf.accept_ra_defrtr, |
| 4909 | .maxlen = sizeof(int), |
| 4910 | .mode = 0644, |
| 4911 | .proc_handler = proc_dointvec, |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 4912 | }, |
| 4913 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4914 | .procname = "accept_ra_pinfo", |
| 4915 | .data = &ipv6_devconf.accept_ra_pinfo, |
| 4916 | .maxlen = sizeof(int), |
| 4917 | .mode = 0644, |
| 4918 | .proc_handler = proc_dointvec, |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 4919 | }, |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 4920 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 4921 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4922 | .procname = "accept_ra_rtr_pref", |
| 4923 | .data = &ipv6_devconf.accept_ra_rtr_pref, |
| 4924 | .maxlen = sizeof(int), |
| 4925 | .mode = 0644, |
| 4926 | .proc_handler = proc_dointvec, |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 4927 | }, |
YOSHIFUJI Hideaki | 52e1635 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 4928 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4929 | .procname = "router_probe_interval", |
| 4930 | .data = &ipv6_devconf.rtr_probe_interval, |
| 4931 | .maxlen = sizeof(int), |
| 4932 | .mode = 0644, |
| 4933 | .proc_handler = proc_dointvec_jiffies, |
YOSHIFUJI Hideaki | 52e1635 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 4934 | }, |
Neil Horman | fa03ef3 | 2007-01-30 14:30:10 -0800 | [diff] [blame] | 4935 | #ifdef CONFIG_IPV6_ROUTE_INFO |
YOSHIFUJI Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 4936 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4937 | .procname = "accept_ra_rt_info_max_plen", |
| 4938 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, |
| 4939 | .maxlen = sizeof(int), |
| 4940 | .mode = 0644, |
| 4941 | .proc_handler = proc_dointvec, |
YOSHIFUJI Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 4942 | }, |
| 4943 | #endif |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 4944 | #endif |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 4945 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4946 | .procname = "proxy_ndp", |
| 4947 | .data = &ipv6_devconf.proxy_ndp, |
| 4948 | .maxlen = sizeof(int), |
| 4949 | .mode = 0644, |
| 4950 | .proc_handler = proc_dointvec, |
YOSHIFUJI Hideaki | fbea49e | 2006-09-22 14:43:49 -0700 | [diff] [blame] | 4951 | }, |
| 4952 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4953 | .procname = "accept_source_route", |
| 4954 | .data = &ipv6_devconf.accept_source_route, |
| 4955 | .maxlen = sizeof(int), |
| 4956 | .mode = 0644, |
| 4957 | .proc_handler = proc_dointvec, |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 4958 | }, |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 4959 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 4960 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4961 | .procname = "optimistic_dad", |
| 4962 | .data = &ipv6_devconf.optimistic_dad, |
| 4963 | .maxlen = sizeof(int), |
| 4964 | .mode = 0644, |
| 4965 | .proc_handler = proc_dointvec, |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 4966 | |
| 4967 | }, |
| 4968 | #endif |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 4969 | #ifdef CONFIG_IPV6_MROUTE |
| 4970 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4971 | .procname = "mc_forwarding", |
| 4972 | .data = &ipv6_devconf.mc_forwarding, |
| 4973 | .maxlen = sizeof(int), |
| 4974 | .mode = 0444, |
| 4975 | .proc_handler = proc_dointvec, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 4976 | }, |
| 4977 | #endif |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 4978 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4979 | .procname = "disable_ipv6", |
| 4980 | .data = &ipv6_devconf.disable_ipv6, |
| 4981 | .maxlen = sizeof(int), |
| 4982 | .mode = 0644, |
| 4983 | .proc_handler = addrconf_sysctl_disable, |
YOSHIFUJI Hideaki | 778d80b | 2008-06-28 14:17:11 +0900 | [diff] [blame] | 4984 | }, |
| 4985 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4986 | .procname = "accept_dad", |
| 4987 | .data = &ipv6_devconf.accept_dad, |
| 4988 | .maxlen = sizeof(int), |
| 4989 | .mode = 0644, |
| 4990 | .proc_handler = proc_dointvec, |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 4991 | }, |
| 4992 | { |
Octavian Purdila | f7734fd | 2009-10-02 11:39:15 +0000 | [diff] [blame] | 4993 | .procname = "force_tllao", |
| 4994 | .data = &ipv6_devconf.force_tllao, |
| 4995 | .maxlen = sizeof(int), |
| 4996 | .mode = 0644, |
| 4997 | .proc_handler = proc_dointvec |
| 4998 | }, |
| 4999 | { |
Hannes Frederic Sowa | 5cb0443 | 2012-11-06 16:46:20 +0000 | [diff] [blame] | 5000 | .procname = "ndisc_notify", |
| 5001 | .data = &ipv6_devconf.ndisc_notify, |
| 5002 | .maxlen = sizeof(int), |
| 5003 | .mode = 0644, |
| 5004 | .proc_handler = proc_dointvec |
| 5005 | }, |
| 5006 | { |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 5007 | /* sentinel */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5008 | } |
| 5009 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5010 | }; |
| 5011 | |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 5012 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 5013 | struct inet6_dev *idev, struct ipv6_devconf *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5014 | { |
| 5015 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5016 | struct addrconf_sysctl_table *t; |
Eric W. Biederman | 6105e29 | 2012-04-19 13:41:24 +0000 | [diff] [blame] | 5017 | char path[sizeof("net/ipv6/conf/") + IFNAMSIZ]; |
Pavel Emelyanov | 1dab622 | 2007-12-02 00:59:38 +1100 | [diff] [blame] | 5018 | |
Arnaldo Carvalho de Melo | af879cc | 2006-11-17 12:14:37 -0200 | [diff] [blame] | 5019 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5020 | if (t == NULL) |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 5021 | goto out; |
| 5022 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 5023 | for (i = 0; t->addrconf_vars[i].data; i++) { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5024 | t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5025 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 5026 | t->addrconf_vars[i].extra2 = net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5027 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5028 | |
Eric W. Biederman | 6105e29 | 2012-04-19 13:41:24 +0000 | [diff] [blame] | 5029 | snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5030 | |
Eric W. Biederman | 6105e29 | 2012-04-19 13:41:24 +0000 | [diff] [blame] | 5031 | t->sysctl_header = register_net_sysctl(net, path, t->addrconf_vars); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5032 | if (t->sysctl_header == NULL) |
Eric W. Biederman | 6105e29 | 2012-04-19 13:41:24 +0000 | [diff] [blame] | 5033 | goto free; |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 5034 | |
| 5035 | p->sysctl = t; |
Pavel Emelyanov | 9589731 | 2008-01-10 17:41:45 -0800 | [diff] [blame] | 5036 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5037 | |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 5038 | free: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5039 | kfree(t); |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 5040 | out: |
Pavel Emelyanov | 9589731 | 2008-01-10 17:41:45 -0800 | [diff] [blame] | 5041 | return -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5042 | } |
| 5043 | |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 5044 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
| 5045 | { |
| 5046 | struct addrconf_sysctl_table *t; |
| 5047 | |
| 5048 | if (p->sysctl == NULL) |
| 5049 | return; |
| 5050 | |
| 5051 | t = p->sysctl; |
| 5052 | p->sysctl = NULL; |
Lucian Adrian Grijincu | ff53881 | 2011-05-01 01:44:01 +0000 | [diff] [blame] | 5053 | unregister_net_sysctl_table(t->sysctl_header); |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 5054 | kfree(t); |
| 5055 | } |
| 5056 | |
Pavel Emelyanov | f52295a | 2007-12-02 00:58:37 +1100 | [diff] [blame] | 5057 | static void addrconf_sysctl_register(struct inet6_dev *idev) |
| 5058 | { |
Eric W. Biederman | 54716e3 | 2010-02-14 03:27:03 +0000 | [diff] [blame] | 5059 | neigh_sysctl_register(idev->dev, idev->nd_parms, "ipv6", |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 5060 | &ndisc_ifinfo_sysctl_change); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 5061 | __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 5062 | idev, &idev->cnf); |
Pavel Emelyanov | f52295a | 2007-12-02 00:58:37 +1100 | [diff] [blame] | 5063 | } |
| 5064 | |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 5065 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5066 | { |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 5067 | __addrconf_sysctl_unregister(&idev->cnf); |
| 5068 | neigh_sysctl_unregister(idev->nd_parms); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5069 | } |
| 5070 | |
| 5071 | |
| 5072 | #endif |
| 5073 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 5074 | static int __net_init addrconf_init_net(struct net *net) |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 5075 | { |
Hong Zhiguo | a79ca22 | 2013-03-26 01:52:45 +0800 | [diff] [blame] | 5076 | int err = -ENOMEM; |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 5077 | struct ipv6_devconf *all, *dflt; |
| 5078 | |
Hong Zhiguo | a79ca22 | 2013-03-26 01:52:45 +0800 | [diff] [blame] | 5079 | all = kmemdup(&ipv6_devconf, sizeof(ipv6_devconf), GFP_KERNEL); |
| 5080 | if (all == NULL) |
| 5081 | goto err_alloc_all; |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 5082 | |
Hong Zhiguo | a79ca22 | 2013-03-26 01:52:45 +0800 | [diff] [blame] | 5083 | dflt = kmemdup(&ipv6_devconf_dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); |
| 5084 | if (dflt == NULL) |
| 5085 | goto err_alloc_dflt; |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 5086 | |
Hong Zhiguo | a79ca22 | 2013-03-26 01:52:45 +0800 | [diff] [blame] | 5087 | /* these will be inherited by all namespaces */ |
| 5088 | dflt->autoconf = ipv6_defaults.autoconf; |
| 5089 | dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 5090 | |
| 5091 | net->ipv6.devconf_all = all; |
| 5092 | net->ipv6.devconf_dflt = dflt; |
| 5093 | |
| 5094 | #ifdef CONFIG_SYSCTL |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 5095 | err = __addrconf_sysctl_register(net, "all", NULL, all); |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 5096 | if (err < 0) |
| 5097 | goto err_reg_all; |
| 5098 | |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 5099 | err = __addrconf_sysctl_register(net, "default", NULL, dflt); |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 5100 | if (err < 0) |
| 5101 | goto err_reg_dflt; |
| 5102 | #endif |
| 5103 | return 0; |
| 5104 | |
| 5105 | #ifdef CONFIG_SYSCTL |
| 5106 | err_reg_dflt: |
| 5107 | __addrconf_sysctl_unregister(all); |
| 5108 | err_reg_all: |
| 5109 | kfree(dflt); |
| 5110 | #endif |
| 5111 | err_alloc_dflt: |
| 5112 | kfree(all); |
| 5113 | err_alloc_all: |
| 5114 | return err; |
| 5115 | } |
| 5116 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 5117 | static void __net_exit addrconf_exit_net(struct net *net) |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 5118 | { |
| 5119 | #ifdef CONFIG_SYSCTL |
| 5120 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); |
| 5121 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); |
| 5122 | #endif |
Octavian Purdila | 09ad9bc | 2009-11-25 15:14:13 -0800 | [diff] [blame] | 5123 | if (!net_eq(net, &init_net)) { |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 5124 | kfree(net->ipv6.devconf_dflt); |
| 5125 | kfree(net->ipv6.devconf_all); |
| 5126 | } |
| 5127 | } |
| 5128 | |
| 5129 | static struct pernet_operations addrconf_ops = { |
| 5130 | .init = addrconf_init_net, |
| 5131 | .exit = addrconf_exit_net, |
| 5132 | }; |
| 5133 | |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 5134 | static struct rtnl_af_ops inet6_ops = { |
| 5135 | .family = AF_INET6, |
| 5136 | .fill_link_af = inet6_fill_link_af, |
| 5137 | .get_link_af_size = inet6_get_link_af_size, |
Daniel Borkmann | f53adae | 2013-04-08 04:01:30 +0000 | [diff] [blame] | 5138 | .set_link_af = inet6_set_link_af, |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 5139 | }; |
| 5140 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5141 | /* |
| 5142 | * Init / cleanup code |
| 5143 | */ |
| 5144 | |
| 5145 | int __init addrconf_init(void) |
| 5146 | { |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 5147 | int i, err; |
YOSHIFUJI Hideaki | 2a8cc6c | 2007-11-14 15:56:23 +0900 | [diff] [blame] | 5148 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 5149 | err = ipv6_addr_label_init(); |
| 5150 | if (err < 0) { |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 5151 | pr_crit("%s: cannot initialize default policy table: %d\n", |
| 5152 | __func__, err); |
Neil Horman | 2cc6d2b | 2010-09-24 09:55:52 +0000 | [diff] [blame] | 5153 | goto out; |
YOSHIFUJI Hideaki | 2a8cc6c | 2007-11-14 15:56:23 +0900 | [diff] [blame] | 5154 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5155 | |
Neil Horman | 2cc6d2b | 2010-09-24 09:55:52 +0000 | [diff] [blame] | 5156 | err = register_pernet_subsys(&addrconf_ops); |
| 5157 | if (err < 0) |
| 5158 | goto out_addrlabel; |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 5159 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5160 | /* The addrconf netdev notifier requires that loopback_dev |
| 5161 | * has it's ipv6 private information allocated and setup |
| 5162 | * before it can bring up and give link-local addresses |
| 5163 | * to other devices which are up. |
| 5164 | * |
| 5165 | * Unfortunately, loopback_dev is not necessarily the first |
| 5166 | * entry in the global dev_base list of net devices. In fact, |
| 5167 | * it is likely to be the very last entry on that list. |
| 5168 | * So this causes the notifier registry below to try and |
| 5169 | * give link-local addresses to all devices besides loopback_dev |
| 5170 | * first, then loopback_dev, which cases all the non-loopback_dev |
| 5171 | * devices to fail to get a link-local address. |
| 5172 | * |
| 5173 | * So, as a temporary fix, allocate the ipv6 structure for |
| 5174 | * loopback_dev first by hand. |
| 5175 | * Longer term, all of the dependencies ipv6 has upon the loopback |
| 5176 | * device and it being up should be removed. |
| 5177 | */ |
| 5178 | rtnl_lock(); |
Eric W. Biederman | 2774c7a | 2007-09-26 22:10:56 -0700 | [diff] [blame] | 5179 | if (!ipv6_add_dev(init_net.loopback_dev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5180 | err = -ENOMEM; |
| 5181 | rtnl_unlock(); |
| 5182 | if (err) |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 5183 | goto errlo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5184 | |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 5185 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
| 5186 | INIT_HLIST_HEAD(&inet6_addr_lst[i]); |
| 5187 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5188 | register_netdevice_notifier(&ipv6_dev_notf); |
| 5189 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5190 | addrconf_verify(0); |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 5191 | |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 5192 | err = rtnl_af_register(&inet6_ops); |
| 5193 | if (err < 0) |
| 5194 | goto errout_af; |
| 5195 | |
Greg Rose | c7ac867 | 2011-06-10 01:27:09 +0000 | [diff] [blame] | 5196 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo, |
| 5197 | NULL); |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 5198 | if (err < 0) |
| 5199 | goto errout; |
| 5200 | |
| 5201 | /* Only the first call to __rtnl_register can fail */ |
Greg Rose | c7ac867 | 2011-06-10 01:27:09 +0000 | [diff] [blame] | 5202 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL); |
| 5203 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL); |
| 5204 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, |
| 5205 | inet6_dump_ifaddr, NULL); |
| 5206 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, |
| 5207 | inet6_dump_ifmcaddr, NULL); |
| 5208 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, |
| 5209 | inet6_dump_ifacaddr, NULL); |
Nicolas Dichtel | 76f8f6c | 2012-10-25 22:28:51 +0000 | [diff] [blame] | 5210 | __rtnl_register(PF_INET6, RTM_GETNETCONF, inet6_netconf_get_devconf, |
Nicolas Dichtel | 7a67420 | 2013-03-05 23:42:06 +0000 | [diff] [blame] | 5211 | inet6_netconf_dump_devconf, NULL); |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 5212 | |
YOSHIFUJI Hideaki | 2a8cc6c | 2007-11-14 15:56:23 +0900 | [diff] [blame] | 5213 | ipv6_addr_label_rtnl_register(); |
| 5214 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5215 | return 0; |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 5216 | errout: |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 5217 | rtnl_af_unregister(&inet6_ops); |
| 5218 | errout_af: |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 5219 | unregister_netdevice_notifier(&ipv6_dev_notf); |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 5220 | errlo: |
| 5221 | unregister_pernet_subsys(&addrconf_ops); |
Neil Horman | 2cc6d2b | 2010-09-24 09:55:52 +0000 | [diff] [blame] | 5222 | out_addrlabel: |
| 5223 | ipv6_addr_label_cleanup(); |
| 5224 | out: |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 5225 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5226 | } |
| 5227 | |
Daniel Lezcano | 09f7709 | 2007-12-13 05:34:58 -0800 | [diff] [blame] | 5228 | void addrconf_cleanup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5229 | { |
Daniel Lezcano | 176c39a | 2009-03-03 01:06:45 -0800 | [diff] [blame] | 5230 | struct net_device *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5231 | int i; |
| 5232 | |
| 5233 | unregister_netdevice_notifier(&ipv6_dev_notf); |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 5234 | unregister_pernet_subsys(&addrconf_ops); |
Neil Horman | 2cc6d2b | 2010-09-24 09:55:52 +0000 | [diff] [blame] | 5235 | ipv6_addr_label_cleanup(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5236 | |
| 5237 | rtnl_lock(); |
| 5238 | |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 5239 | __rtnl_af_unregister(&inet6_ops); |
| 5240 | |
Daniel Lezcano | 176c39a | 2009-03-03 01:06:45 -0800 | [diff] [blame] | 5241 | /* clean dev list */ |
| 5242 | for_each_netdev(&init_net, dev) { |
| 5243 | if (__in6_dev_get(dev) == NULL) |
| 5244 | continue; |
| 5245 | addrconf_ifdown(dev, 1); |
| 5246 | } |
| 5247 | addrconf_ifdown(init_net.loopback_dev, 2); |
| 5248 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5249 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5250 | * Check hash table. |
| 5251 | */ |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 5252 | spin_lock_bh(&addrconf_hash_lock); |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 5253 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
| 5254 | WARN_ON(!hlist_empty(&inet6_addr_lst[i])); |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 5255 | spin_unlock_bh(&addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5256 | |
| 5257 | del_timer(&addr_chk_timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5258 | rtnl_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5259 | } |