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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include <linux/errno.h> |
| 42 | #include <linux/types.h> |
Ilpo Järvinen | a0bffff | 2009-03-21 13:36:17 -0700 | [diff] [blame] | 43 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <linux/socket.h> |
| 45 | #include <linux/sockios.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #include <linux/net.h> |
| 47 | #include <linux/in6.h> |
| 48 | #include <linux/netdevice.h> |
Thomas Graf | 1823730 | 2006-08-04 23:04:54 -0700 | [diff] [blame] | 49 | #include <linux/if_addr.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #include <linux/if_arp.h> |
| 51 | #include <linux/if_arcnet.h> |
| 52 | #include <linux/if_infiniband.h> |
| 53 | #include <linux/route.h> |
| 54 | #include <linux/inetdevice.h> |
| 55 | #include <linux/init.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 56 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | #ifdef CONFIG_SYSCTL |
| 58 | #include <linux/sysctl.h> |
| 59 | #endif |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 60 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | #include <linux/delay.h> |
| 62 | #include <linux/notifier.h> |
Paulo Marques | 543537b | 2005-06-23 00:09:02 -0700 | [diff] [blame] | 63 | #include <linux/string.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 65 | #include <net/net_namespace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | #include <net/sock.h> |
| 67 | #include <net/snmp.h> |
| 68 | |
| 69 | #include <net/ipv6.h> |
| 70 | #include <net/protocol.h> |
| 71 | #include <net/ndisc.h> |
| 72 | #include <net/ip6_route.h> |
| 73 | #include <net/addrconf.h> |
| 74 | #include <net/tcp.h> |
| 75 | #include <net/ip.h> |
Thomas Graf | 5d62026 | 2006-08-15 00:35:02 -0700 | [diff] [blame] | 76 | #include <net/netlink.h> |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 77 | #include <net/pkt_sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | #include <linux/if_tunnel.h> |
| 79 | #include <linux/rtnetlink.h> |
| 80 | |
| 81 | #ifdef CONFIG_IPV6_PRIVACY |
| 82 | #include <linux/random.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | #endif |
| 84 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 85 | #include <linux/uaccess.h> |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 86 | #include <asm/unaligned.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | |
| 88 | #include <linux/proc_fs.h> |
| 89 | #include <linux/seq_file.h> |
Paul Gortmaker | bc3b2d7 | 2011-07-15 11:47:34 -0400 | [diff] [blame] | 90 | #include <linux/export.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | |
| 92 | /* Set to 3 to get tracing... */ |
| 93 | #define ACONF_DEBUG 2 |
| 94 | |
| 95 | #if ACONF_DEBUG >= 3 |
| 96 | #define ADBG(x) printk x |
| 97 | #else |
| 98 | #define ADBG(x) |
| 99 | #endif |
| 100 | |
| 101 | #define INFINITY_LIFE_TIME 0xFFFFFFFF |
Thomas Graf | 18a31e1 | 2010-11-17 04:12:02 +0000 | [diff] [blame] | 102 | |
| 103 | static inline u32 cstamp_delta(unsigned long cstamp) |
| 104 | { |
| 105 | return (cstamp - INITIAL_JIFFIES) * 100UL / HZ; |
| 106 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | |
YOSHIFUJI Hideaki | b2db756 | 2010-03-20 16:11:12 -0700 | [diff] [blame] | 108 | #define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ/50 : 1) |
| 109 | #define ADDRCONF_TIMER_FUZZ (HZ / 4) |
| 110 | #define ADDRCONF_TIMER_FUZZ_MAX (HZ) |
| 111 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | #ifdef CONFIG_SYSCTL |
Pavel Emelyanov | f52295a | 2007-12-02 00:58:37 +1100 | [diff] [blame] | 113 | static void addrconf_sysctl_register(struct inet6_dev *idev); |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 114 | static void addrconf_sysctl_unregister(struct inet6_dev *idev); |
| 115 | #else |
| 116 | static inline void addrconf_sysctl_register(struct inet6_dev *idev) |
| 117 | { |
| 118 | } |
| 119 | |
| 120 | static inline void addrconf_sysctl_unregister(struct inet6_dev *idev) |
| 121 | { |
| 122 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | #endif |
| 124 | |
| 125 | #ifdef CONFIG_IPV6_PRIVACY |
| 126 | static int __ipv6_regen_rndid(struct inet6_dev *idev); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 127 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | static void ipv6_regen_rndid(unsigned long data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | #endif |
| 130 | |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 131 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | static int ipv6_count_addresses(struct inet6_dev *idev); |
| 133 | |
| 134 | /* |
| 135 | * Configured unicast address hash table |
| 136 | */ |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 137 | static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE]; |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 138 | static DEFINE_SPINLOCK(addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | static void addrconf_verify(unsigned long); |
| 141 | |
Ingo Molnar | 8d06afa | 2005-09-09 13:10:40 -0700 | [diff] [blame] | 142 | static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | static DEFINE_SPINLOCK(addrconf_verify_lock); |
| 144 | |
| 145 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); |
| 146 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); |
| 147 | |
Jiri Pirko | 93d9b7d | 2010-03-10 10:28:56 +0000 | [diff] [blame] | 148 | static void addrconf_type_change(struct net_device *dev, |
| 149 | unsigned long event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | static int addrconf_ifdown(struct net_device *dev, int how); |
| 151 | |
Jamal Hadi Salim | e431b8c | 2005-06-18 22:55:31 -0700 | [diff] [blame] | 152 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | static void addrconf_dad_timer(unsigned long data); |
| 154 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 155 | static void addrconf_dad_run(struct inet6_dev *idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | static void addrconf_rs_timer(unsigned long data); |
| 157 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); |
| 158 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); |
| 159 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 160 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | struct prefix_info *pinfo); |
David S. Miller | 3e81c6d | 2010-03-20 16:18:00 -0700 | [diff] [blame] | 162 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
| 163 | struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 165 | static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | |
Adrian Bunk | 888c848 | 2008-07-22 14:21:58 -0700 | [diff] [blame] | 167 | static struct ipv6_devconf ipv6_devconf __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | .forwarding = 0, |
| 169 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, |
| 170 | .mtu6 = IPV6_MIN_MTU, |
| 171 | .accept_ra = 1, |
| 172 | .accept_redirects = 1, |
| 173 | .autoconf = 1, |
| 174 | .force_mld_version = 0, |
| 175 | .dad_transmits = 1, |
| 176 | .rtr_solicits = MAX_RTR_SOLICITATIONS, |
| 177 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, |
| 178 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, |
| 179 | #ifdef CONFIG_IPV6_PRIVACY |
| 180 | .use_tempaddr = 0, |
| 181 | .temp_valid_lft = TEMP_VALID_LIFETIME, |
| 182 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, |
| 183 | .regen_max_retry = REGEN_MAX_RETRY, |
| 184 | .max_desync_factor = MAX_DESYNC_FACTOR, |
| 185 | #endif |
| 186 | .max_addresses = IPV6_MAX_ADDRESSES, |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 187 | .accept_ra_defrtr = 1, |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 188 | .accept_ra_pinfo = 1, |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 189 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 190 | .accept_ra_rtr_pref = 1, |
YOSHIFUJI Hideaki | 52e1635 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 191 | .rtr_probe_interval = 60 * HZ, |
YOSHIFUJI Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 192 | #ifdef CONFIG_IPV6_ROUTE_INFO |
| 193 | .accept_ra_rt_info_max_plen = 0, |
| 194 | #endif |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 195 | #endif |
YOSHIFUJI Hideaki | fbea49e | 2006-09-22 14:43:49 -0700 | [diff] [blame] | 196 | .proxy_ndp = 0, |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 197 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
YOSHIFUJI Hideaki | 778d80b | 2008-06-28 14:17:11 +0900 | [diff] [blame] | 198 | .disable_ipv6 = 0, |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 199 | .accept_dad = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | }; |
| 201 | |
Brian Haley | ab32ea5 | 2006-09-22 14:15:41 -0700 | [diff] [blame] | 202 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | .forwarding = 0, |
| 204 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, |
| 205 | .mtu6 = IPV6_MIN_MTU, |
| 206 | .accept_ra = 1, |
| 207 | .accept_redirects = 1, |
| 208 | .autoconf = 1, |
| 209 | .dad_transmits = 1, |
| 210 | .rtr_solicits = MAX_RTR_SOLICITATIONS, |
| 211 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, |
| 212 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, |
| 213 | #ifdef CONFIG_IPV6_PRIVACY |
| 214 | .use_tempaddr = 0, |
| 215 | .temp_valid_lft = TEMP_VALID_LIFETIME, |
| 216 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, |
| 217 | .regen_max_retry = REGEN_MAX_RETRY, |
| 218 | .max_desync_factor = MAX_DESYNC_FACTOR, |
| 219 | #endif |
| 220 | .max_addresses = IPV6_MAX_ADDRESSES, |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 221 | .accept_ra_defrtr = 1, |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 222 | .accept_ra_pinfo = 1, |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 223 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 224 | .accept_ra_rtr_pref = 1, |
YOSHIFUJI Hideaki | 52e1635 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 225 | .rtr_probe_interval = 60 * HZ, |
YOSHIFUJI Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 226 | #ifdef CONFIG_IPV6_ROUTE_INFO |
| 227 | .accept_ra_rt_info_max_plen = 0, |
| 228 | #endif |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 229 | #endif |
YOSHIFUJI Hideaki | fbea49e | 2006-09-22 14:43:49 -0700 | [diff] [blame] | 230 | .proxy_ndp = 0, |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 231 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
YOSHIFUJI Hideaki | 778d80b | 2008-06-28 14:17:11 +0900 | [diff] [blame] | 232 | .disable_ipv6 = 0, |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 233 | .accept_dad = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | }; |
| 235 | |
| 236 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 239 | const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT; |
| 240 | const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 242 | /* Check if a valid qdisc is available */ |
David S. Miller | 0529794 | 2008-07-08 23:01:27 -0700 | [diff] [blame] | 243 | static inline bool addrconf_qdisc_ok(const struct net_device *dev) |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 244 | { |
David S. Miller | 0529794 | 2008-07-08 23:01:27 -0700 | [diff] [blame] | 245 | return !qdisc_tx_is_noop(dev); |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 246 | } |
| 247 | |
YOSHIFUJI Hideaki | 2b5ead4 | 2008-05-13 01:16:24 +0900 | [diff] [blame] | 248 | /* Check if a route is valid prefix route */ |
| 249 | static inline int addrconf_is_prefix_route(const struct rt6_info *rt) |
| 250 | { |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 251 | return (rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0; |
YOSHIFUJI Hideaki | 2b5ead4 | 2008-05-13 01:16:24 +0900 | [diff] [blame] | 252 | } |
| 253 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | static void addrconf_del_timer(struct inet6_ifaddr *ifp) |
| 255 | { |
| 256 | if (del_timer(&ifp->timer)) |
| 257 | __in6_ifa_put(ifp); |
| 258 | } |
| 259 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 260 | enum addrconf_timer_t { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | AC_NONE, |
| 262 | AC_DAD, |
| 263 | AC_RS, |
| 264 | }; |
| 265 | |
| 266 | static void addrconf_mod_timer(struct inet6_ifaddr *ifp, |
| 267 | enum addrconf_timer_t what, |
| 268 | unsigned long when) |
| 269 | { |
| 270 | if (!del_timer(&ifp->timer)) |
| 271 | in6_ifa_hold(ifp); |
| 272 | |
| 273 | switch (what) { |
| 274 | case AC_DAD: |
| 275 | ifp->timer.function = addrconf_dad_timer; |
| 276 | break; |
| 277 | case AC_RS: |
| 278 | ifp->timer.function = addrconf_rs_timer; |
| 279 | break; |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 280 | default: |
| 281 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | } |
| 283 | ifp->timer.expires = jiffies + when; |
| 284 | add_timer(&ifp->timer); |
| 285 | } |
| 286 | |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 287 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
| 288 | { |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 289 | if (snmp_mib_init((void __percpu **)idev->stats.ipv6, |
Eric Dumazet | 1823e4c8 | 2010-06-22 20:58:41 +0000 | [diff] [blame] | 290 | sizeof(struct ipstats_mib), |
| 291 | __alignof__(struct ipstats_mib)) < 0) |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 292 | goto err_ip; |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 293 | idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device), |
| 294 | GFP_KERNEL); |
| 295 | if (!idev->stats.icmpv6dev) |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 296 | goto err_icmp; |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 297 | idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device), |
| 298 | GFP_KERNEL); |
| 299 | if (!idev->stats.icmpv6msgdev) |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 300 | goto err_icmpmsg; |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 301 | |
| 302 | return 0; |
| 303 | |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 304 | err_icmpmsg: |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 305 | kfree(idev->stats.icmpv6dev); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 306 | err_icmp: |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 307 | snmp_mib_free((void __percpu **)idev->stats.ipv6); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 308 | err_ip: |
Pavel Emelyanov | aaf70ec | 2007-10-17 21:25:32 -0700 | [diff] [blame] | 309 | return -ENOMEM; |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 310 | } |
| 311 | |
Pavel Emelyanov | 16910b9 | 2007-10-17 21:23:43 -0700 | [diff] [blame] | 312 | static void snmp6_free_dev(struct inet6_dev *idev) |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 313 | { |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 314 | kfree(idev->stats.icmpv6msgdev); |
| 315 | kfree(idev->stats.icmpv6dev); |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 316 | snmp_mib_free((void __percpu **)idev->stats.ipv6); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 317 | } |
| 318 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | /* Nobody refers to this device, we may destroy it. */ |
| 320 | |
| 321 | void in6_dev_finish_destroy(struct inet6_dev *idev) |
| 322 | { |
| 323 | struct net_device *dev = idev->dev; |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 324 | |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 325 | WARN_ON(!list_empty(&idev->addr_list)); |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 326 | WARN_ON(idev->mc_list != NULL); |
| 327 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | #ifdef NET_REFCNT_DEBUG |
| 329 | printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL"); |
| 330 | #endif |
| 331 | dev_put(dev); |
| 332 | if (!idev->dead) { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 333 | pr_warning("Freeing alive inet6 device %p\n", idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | return; |
| 335 | } |
| 336 | snmp6_free_dev(idev); |
Lai Jiangshan | 38f57d1 | 2011-03-15 17:59:14 +0800 | [diff] [blame] | 337 | kfree_rcu(idev, rcu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | } |
| 339 | |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 340 | EXPORT_SYMBOL(in6_dev_finish_destroy); |
| 341 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | static struct inet6_dev * ipv6_add_dev(struct net_device *dev) |
| 343 | { |
| 344 | struct inet6_dev *ndev; |
| 345 | |
| 346 | ASSERT_RTNL(); |
| 347 | |
| 348 | if (dev->mtu < IPV6_MIN_MTU) |
| 349 | return NULL; |
| 350 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 351 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 353 | if (ndev == NULL) |
| 354 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 356 | rwlock_init(&ndev->lock); |
| 357 | ndev->dev = dev; |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 358 | INIT_LIST_HEAD(&ndev->addr_list); |
| 359 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 360 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 361 | ndev->cnf.mtu6 = dev->mtu; |
| 362 | ndev->cnf.sysctl = NULL; |
| 363 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); |
| 364 | if (ndev->nd_parms == NULL) { |
| 365 | kfree(ndev); |
| 366 | return NULL; |
| 367 | } |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 368 | if (ndev->cnf.forwarding) |
| 369 | dev_disable_lro(dev); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 370 | /* We refer to the device */ |
| 371 | dev_hold(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 373 | if (snmp6_alloc_dev(ndev) < 0) { |
| 374 | ADBG((KERN_WARNING |
| 375 | "%s(): cannot allocate memory for statistics; dev=%s.\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 376 | __func__, dev->name)); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 377 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
Roy Li | 8603e33 | 2011-09-20 15:10:16 -0400 | [diff] [blame] | 378 | dev_put(dev); |
| 379 | kfree(ndev); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 380 | return NULL; |
| 381 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 383 | if (snmp6_register_dev(ndev) < 0) { |
| 384 | ADBG((KERN_WARNING |
| 385 | "%s(): cannot create /proc/net/dev_snmp6/%s\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 386 | __func__, dev->name)); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 387 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
| 388 | ndev->dead = 1; |
| 389 | in6_dev_finish_destroy(ndev); |
| 390 | return NULL; |
| 391 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 393 | /* One reference from device. We must do this before |
| 394 | * we invoke __ipv6_regen_rndid(). |
| 395 | */ |
| 396 | in6_dev_hold(ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 398 | if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) |
| 399 | ndev->cnf.accept_dad = -1; |
| 400 | |
YOSHIFUJI Hideaki | b077d7a | 2008-04-13 23:42:18 -0700 | [diff] [blame] | 401 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
| 402 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { |
| 403 | printk(KERN_INFO |
| 404 | "%s: Disabled Multicast RS\n", |
| 405 | dev->name); |
| 406 | ndev->cnf.rtr_solicits = 0; |
| 407 | } |
| 408 | #endif |
| 409 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | #ifdef CONFIG_IPV6_PRIVACY |
stephen hemminger | 372e6c8 | 2010-03-17 20:31:09 +0000 | [diff] [blame] | 411 | INIT_LIST_HEAD(&ndev->tempaddr_list); |
Pavel Emelyanov | b24b8a2 | 2008-01-23 21:20:07 -0800 | [diff] [blame] | 412 | setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 413 | if ((dev->flags&IFF_LOOPBACK) || |
| 414 | dev->type == ARPHRD_TUNNEL || |
YOSHIFUJI Hideaki | 9625ed7 | 2008-04-13 23:47:11 -0700 | [diff] [blame] | 415 | dev->type == ARPHRD_TUNNEL6 || |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 416 | dev->type == ARPHRD_SIT || |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 417 | dev->type == ARPHRD_NONE) { |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 418 | ndev->cnf.use_tempaddr = -1; |
| 419 | } else { |
| 420 | in6_dev_hold(ndev); |
| 421 | ipv6_regen_rndid((unsigned long) ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | } |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 423 | #endif |
| 424 | |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 425 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
Herbert Xu | 53aadcc | 2007-03-27 14:31:52 -0700 | [diff] [blame] | 426 | ndev->if_flags |= IF_READY; |
| 427 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 428 | ipv6_mc_init_dev(ndev); |
| 429 | ndev->tstamp = jiffies; |
Pavel Emelyanov | f52295a | 2007-12-02 00:58:37 +1100 | [diff] [blame] | 430 | addrconf_sysctl_register(ndev); |
David L Stevens | 30c4cf5 | 2007-01-04 12:31:14 -0800 | [diff] [blame] | 431 | /* protected by rtnl_lock */ |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 432 | rcu_assign_pointer(dev->ip6_ptr, ndev); |
YOSHIFUJI Hideaki | d88ae4c | 2007-01-14 21:48:40 -0800 | [diff] [blame] | 433 | |
| 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | return ndev; |
| 438 | } |
| 439 | |
YOSHIFUJI Hideaki | cee8947 | 2008-04-13 23:21:16 -0700 | [diff] [blame] | 440 | static struct inet6_dev * ipv6_find_idev(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | { |
| 442 | struct inet6_dev *idev; |
| 443 | |
| 444 | ASSERT_RTNL(); |
| 445 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 446 | idev = __in6_dev_get(dev); |
| 447 | if (!idev) { |
| 448 | idev = ipv6_add_dev(dev); |
| 449 | if (!idev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | return NULL; |
| 451 | } |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 452 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | if (dev->flags&IFF_UP) |
| 454 | ipv6_mc_up(idev); |
| 455 | return idev; |
| 456 | } |
| 457 | |
| 458 | #ifdef CONFIG_SYSCTL |
| 459 | static void dev_forward_change(struct inet6_dev *idev) |
| 460 | { |
| 461 | struct net_device *dev; |
| 462 | struct inet6_ifaddr *ifa; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | |
| 464 | if (!idev) |
| 465 | return; |
| 466 | dev = idev->dev; |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 467 | if (idev->cnf.forwarding) |
| 468 | dev_disable_lro(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | if (dev && (dev->flags & IFF_MULTICAST)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | if (idev->cnf.forwarding) |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 471 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | else |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 473 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | } |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 475 | |
| 476 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
Michal Wrobel | 2c12a74 | 2007-02-26 15:36:10 -0800 | [diff] [blame] | 477 | if (ifa->flags&IFA_F_TENTATIVE) |
| 478 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | if (idev->cnf.forwarding) |
| 480 | addrconf_join_anycast(ifa); |
| 481 | else |
| 482 | addrconf_leave_anycast(ifa); |
| 483 | } |
| 484 | } |
| 485 | |
| 486 | |
Pavel Emelyanov | e186932 | 2008-01-10 17:43:50 -0800 | [diff] [blame] | 487 | static void addrconf_forward_change(struct net *net, __s32 newf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | { |
| 489 | struct net_device *dev; |
| 490 | struct inet6_dev *idev; |
| 491 | |
Eric Dumazet | c6d14c8 | 2009-11-04 05:43:23 -0800 | [diff] [blame] | 492 | rcu_read_lock(); |
| 493 | for_each_netdev_rcu(net, dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | idev = __in6_dev_get(dev); |
| 495 | if (idev) { |
Pavel Emelyanov | e186932 | 2008-01-10 17:43:50 -0800 | [diff] [blame] | 496 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
| 497 | idev->cnf.forwarding = newf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | if (changed) |
| 499 | dev_forward_change(idev); |
| 500 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | } |
Eric Dumazet | c6d14c8 | 2009-11-04 05:43:23 -0800 | [diff] [blame] | 502 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | } |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 504 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 505 | 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] | 506 | { |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 507 | struct net *net; |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 508 | int old; |
| 509 | |
| 510 | if (!rtnl_trylock()) |
| 511 | return restart_syscall(); |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 512 | |
| 513 | net = (struct net *)table->extra2; |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 514 | old = *p; |
| 515 | *p = newf; |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 516 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 517 | if (p == &net->ipv6.devconf_dflt->forwarding) { |
| 518 | rtnl_unlock(); |
| 519 | return 0; |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 520 | } |
Stephen Hemminger | b325fdd | 2009-02-26 06:55:31 +0000 | [diff] [blame] | 521 | |
Pavel Emelyanov | e186932 | 2008-01-10 17:43:50 -0800 | [diff] [blame] | 522 | if (p == &net->ipv6.devconf_all->forwarding) { |
Pavel Emelyanov | e186932 | 2008-01-10 17:43:50 -0800 | [diff] [blame] | 523 | net->ipv6.devconf_dflt->forwarding = newf; |
| 524 | addrconf_forward_change(net, newf); |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 525 | } else if ((!newf) ^ (!old)) |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 526 | dev_forward_change((struct inet6_dev *)table->extra1); |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 527 | rtnl_unlock(); |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 528 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 529 | if (newf) |
Daniel Lezcano | 7b4da53 | 2008-03-04 13:47:14 -0800 | [diff] [blame] | 530 | rt6_purge_dflt_routers(net); |
Stephen Hemminger | b325fdd | 2009-02-26 06:55:31 +0000 | [diff] [blame] | 531 | return 1; |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 532 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | #endif |
| 534 | |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 535 | /* Nobody refers to this ifaddr, destroy it */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) |
| 537 | { |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 538 | WARN_ON(!hlist_unhashed(&ifp->addr_lst)); |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 539 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | #ifdef NET_REFCNT_DEBUG |
| 541 | printk(KERN_DEBUG "inet6_ifa_finish_destroy\n"); |
| 542 | #endif |
| 543 | |
| 544 | in6_dev_put(ifp->idev); |
| 545 | |
| 546 | if (del_timer(&ifp->timer)) |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 547 | pr_notice("Timer is still running, when freeing ifa=%p\n", ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | |
Herbert Xu | e9d3e08 | 2010-05-18 15:36:06 -0700 | [diff] [blame] | 549 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 550 | pr_warning("Freeing alive inet6 address %p\n", ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | return; |
| 552 | } |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 553 | dst_release(&ifp->rt->dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | |
Lai Jiangshan | e578598 | 2011-03-15 18:00:14 +0800 | [diff] [blame] | 555 | kfree_rcu(ifp, rcu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | } |
| 557 | |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 558 | static void |
| 559 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) |
| 560 | { |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 561 | struct list_head *p; |
YOSHIFUJI Hideaki | 8a6ce0c | 2006-07-11 13:05:30 -0700 | [diff] [blame] | 562 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 563 | |
| 564 | /* |
| 565 | * Each device address list is sorted in order of scope - |
| 566 | * global before linklocal. |
| 567 | */ |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 568 | list_for_each(p, &idev->addr_list) { |
| 569 | struct inet6_ifaddr *ifa |
| 570 | = list_entry(p, struct inet6_ifaddr, if_list); |
YOSHIFUJI Hideaki | 8a6ce0c | 2006-07-11 13:05:30 -0700 | [diff] [blame] | 571 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 572 | break; |
| 573 | } |
| 574 | |
David S. Miller | b54c9b9 | 2010-03-25 21:25:30 -0700 | [diff] [blame] | 575 | list_add_tail(&ifp->if_list, p); |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 576 | } |
| 577 | |
stephen hemminger | 3a88a81 | 2010-03-17 20:31:12 +0000 | [diff] [blame] | 578 | static u32 ipv6_addr_hash(const struct in6_addr *addr) |
YOSHIFUJI Hideaki | 3eb84f4 | 2008-04-10 15:42:08 +0900 | [diff] [blame] | 579 | { |
YOSHIFUJI Hideaki | 3eb84f4 | 2008-04-10 15:42:08 +0900 | [diff] [blame] | 580 | /* |
| 581 | * We perform the hash function over the last 64 bits of the address |
| 582 | * This will include the IEEE address token on links that support it. |
| 583 | */ |
Eric Dumazet | 0eae88f | 2010-04-20 19:06:52 -0700 | [diff] [blame] | 584 | return jhash_2words((__force u32)addr->s6_addr32[2], |
| 585 | (__force u32)addr->s6_addr32[3], 0) |
stephen hemminger | 3a88a81 | 2010-03-17 20:31:12 +0000 | [diff] [blame] | 586 | & (IN6_ADDR_HSIZE - 1); |
YOSHIFUJI Hideaki | 3eb84f4 | 2008-04-10 15:42:08 +0900 | [diff] [blame] | 587 | } |
| 588 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | /* On success it returns ifp with increased reference count */ |
| 590 | |
| 591 | static struct inet6_ifaddr * |
| 592 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, |
Jamal Hadi Salim | e431b8c | 2005-06-18 22:55:31 -0700 | [diff] [blame] | 593 | int scope, u32 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | { |
| 595 | struct inet6_ifaddr *ifa = NULL; |
| 596 | struct rt6_info *rt; |
stephen hemminger | 3a88a81 | 2010-03-17 20:31:12 +0000 | [diff] [blame] | 597 | unsigned int hash; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | int err = 0; |
YOSHIFUJI Hideaki | d68b827 | 2008-06-25 16:26:47 +0900 | [diff] [blame] | 599 | int addr_type = ipv6_addr_type(addr); |
| 600 | |
| 601 | if (addr_type == IPV6_ADDR_ANY || |
| 602 | addr_type & IPV6_ADDR_MULTICAST || |
| 603 | (!(idev->dev->flags & IFF_LOOPBACK) && |
| 604 | addr_type & IPV6_ADDR_LOOPBACK)) |
| 605 | return ERR_PTR(-EADDRNOTAVAIL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 607 | rcu_read_lock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | if (idev->dead) { |
| 609 | err = -ENODEV; /*XXX*/ |
| 610 | goto out2; |
| 611 | } |
| 612 | |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 613 | if (idev->cnf.disable_ipv6) { |
Brian Haley | 9bdd8d4 | 2009-03-18 18:22:48 -0700 | [diff] [blame] | 614 | err = -EACCES; |
| 615 | goto out2; |
| 616 | } |
| 617 | |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 618 | spin_lock(&addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | |
| 620 | /* Ignore adding duplicate addresses on an interface */ |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 621 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | ADBG(("ipv6_add_addr: already assigned\n")); |
| 623 | err = -EEXIST; |
| 624 | goto out; |
| 625 | } |
| 626 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 627 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | |
| 629 | if (ifa == NULL) { |
| 630 | ADBG(("ipv6_add_addr: malloc failed\n")); |
| 631 | err = -ENOBUFS; |
| 632 | goto out; |
| 633 | } |
| 634 | |
David S. Miller | 8f03151 | 2011-12-06 16:48:14 -0500 | [diff] [blame] | 635 | rt = addrconf_dst_alloc(idev, addr, false); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | if (IS_ERR(rt)) { |
| 637 | err = PTR_ERR(rt); |
| 638 | goto out; |
| 639 | } |
| 640 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 641 | ifa->addr = *addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | |
| 643 | spin_lock_init(&ifa->lock); |
Herbert Xu | e9d3e08 | 2010-05-18 15:36:06 -0700 | [diff] [blame] | 644 | spin_lock_init(&ifa->state_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | init_timer(&ifa->timer); |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 646 | INIT_HLIST_NODE(&ifa->addr_lst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | ifa->timer.data = (unsigned long) ifa; |
| 648 | ifa->scope = scope; |
| 649 | ifa->prefix_len = pfxlen; |
| 650 | ifa->flags = flags | IFA_F_TENTATIVE; |
| 651 | ifa->cstamp = ifa->tstamp = jiffies; |
| 652 | |
Keir Fraser | 57f5f54 | 2006-08-29 02:43:49 -0700 | [diff] [blame] | 653 | ifa->rt = rt; |
| 654 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | ifa->idev = idev; |
| 656 | in6_dev_hold(idev); |
| 657 | /* For caller */ |
| 658 | in6_ifa_hold(ifa); |
| 659 | |
| 660 | /* Add to big hash table */ |
| 661 | hash = ipv6_addr_hash(addr); |
| 662 | |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 663 | hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]); |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 664 | spin_unlock(&addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | |
| 666 | write_lock(&idev->lock); |
| 667 | /* Add to inet6_dev unicast addr list. */ |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 668 | ipv6_link_dev_addr(idev, ifa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | |
| 670 | #ifdef CONFIG_IPV6_PRIVACY |
| 671 | if (ifa->flags&IFA_F_TEMPORARY) { |
stephen hemminger | 372e6c8 | 2010-03-17 20:31:09 +0000 | [diff] [blame] | 672 | list_add(&ifa->tmp_list, &idev->tempaddr_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | in6_ifa_hold(ifa); |
| 674 | } |
| 675 | #endif |
| 676 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | in6_ifa_hold(ifa); |
| 678 | write_unlock(&idev->lock); |
| 679 | out2: |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 680 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | |
YOSHIFUJI Hideaki | fd92833 | 2005-04-19 22:27:09 -0700 | [diff] [blame] | 682 | if (likely(err == 0)) |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 683 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | else { |
| 685 | kfree(ifa); |
| 686 | ifa = ERR_PTR(err); |
| 687 | } |
| 688 | |
| 689 | return ifa; |
| 690 | out: |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 691 | spin_unlock(&addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | goto out2; |
| 693 | } |
| 694 | |
| 695 | /* This function wants to get referenced ifp and releases it before return */ |
| 696 | |
| 697 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) |
| 698 | { |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 699 | struct inet6_ifaddr *ifa, *ifn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | struct inet6_dev *idev = ifp->idev; |
Herbert Xu | 4c5ff6a | 2010-05-18 15:54:18 -0700 | [diff] [blame] | 701 | int state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | int deleted = 0, onlink = 0; |
| 703 | unsigned long expires = jiffies; |
| 704 | |
Herbert Xu | 4c5ff6a | 2010-05-18 15:54:18 -0700 | [diff] [blame] | 705 | spin_lock_bh(&ifp->state_lock); |
| 706 | state = ifp->state; |
Herbert Xu | e9d3e08 | 2010-05-18 15:36:06 -0700 | [diff] [blame] | 707 | ifp->state = INET6_IFADDR_STATE_DEAD; |
Herbert Xu | 4c5ff6a | 2010-05-18 15:54:18 -0700 | [diff] [blame] | 708 | spin_unlock_bh(&ifp->state_lock); |
| 709 | |
| 710 | if (state == INET6_IFADDR_STATE_DEAD) |
| 711 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 713 | spin_lock_bh(&addrconf_hash_lock); |
| 714 | hlist_del_init_rcu(&ifp->addr_lst); |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 715 | spin_unlock_bh(&addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | |
| 717 | write_lock_bh(&idev->lock); |
| 718 | #ifdef CONFIG_IPV6_PRIVACY |
| 719 | if (ifp->flags&IFA_F_TEMPORARY) { |
stephen hemminger | 372e6c8 | 2010-03-17 20:31:09 +0000 | [diff] [blame] | 720 | list_del(&ifp->tmp_list); |
| 721 | if (ifp->ifpub) { |
| 722 | in6_ifa_put(ifp->ifpub); |
| 723 | ifp->ifpub = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | } |
stephen hemminger | 372e6c8 | 2010-03-17 20:31:09 +0000 | [diff] [blame] | 725 | __in6_ifa_put(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | } |
| 727 | #endif |
| 728 | |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 729 | list_for_each_entry_safe(ifa, ifn, &idev->addr_list, if_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | if (ifa == ifp) { |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 731 | list_del_init(&ifp->if_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | __in6_ifa_put(ifp); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 733 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) |
| 735 | break; |
| 736 | deleted = 1; |
Kristian Slavov | 1d14280 | 2005-12-21 18:47:24 -0800 | [diff] [blame] | 737 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | } else if (ifp->flags & IFA_F_PERMANENT) { |
| 739 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, |
| 740 | ifp->prefix_len)) { |
| 741 | if (ifa->flags & IFA_F_PERMANENT) { |
| 742 | onlink = 1; |
| 743 | if (deleted) |
| 744 | break; |
| 745 | } else { |
| 746 | unsigned long lifetime; |
| 747 | |
| 748 | if (!onlink) |
| 749 | onlink = -1; |
| 750 | |
| 751 | spin_lock(&ifa->lock); |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 752 | |
| 753 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); |
| 754 | /* |
| 755 | * Note: Because this address is |
| 756 | * not permanent, lifetime < |
| 757 | * LONG_MAX / HZ here. |
| 758 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | if (time_before(expires, |
| 760 | ifa->tstamp + lifetime * HZ)) |
| 761 | expires = ifa->tstamp + lifetime * HZ; |
| 762 | spin_unlock(&ifa->lock); |
| 763 | } |
| 764 | } |
| 765 | } |
| 766 | } |
| 767 | write_unlock_bh(&idev->lock); |
| 768 | |
Andrey Vagin | b223856 | 2008-07-08 15:13:31 -0700 | [diff] [blame] | 769 | addrconf_del_timer(ifp); |
| 770 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
| 772 | |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 773 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | /* |
| 776 | * Purge or update corresponding prefix |
| 777 | * |
| 778 | * 1) we don't purge prefix here if address was not permanent. |
| 779 | * prefix is managed by its own lifetime. |
| 780 | * 2) if there're no addresses, delete prefix. |
| 781 | * 3) if there're still other permanent address(es), |
| 782 | * corresponding prefix is still permanent. |
| 783 | * 4) otherwise, update prefix lifetime to the |
| 784 | * longest valid lifetime among the corresponding |
| 785 | * addresses on the device. |
| 786 | * Note: subsequent RA will update lifetime. |
| 787 | * |
| 788 | * --yoshfuji |
| 789 | */ |
| 790 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { |
| 791 | struct in6_addr prefix; |
| 792 | struct rt6_info *rt; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 793 | struct net *net = dev_net(ifp->idev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 795 | rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | |
YOSHIFUJI Hideaki | 2b5ead4 | 2008-05-13 01:16:24 +0900 | [diff] [blame] | 797 | if (rt && addrconf_is_prefix_route(rt)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | if (onlink == 0) { |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 799 | ip6_del_rt(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | rt = NULL; |
| 801 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 802 | rt->dst.expires = expires; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | rt->rt6i_flags |= RTF_EXPIRES; |
| 804 | } |
| 805 | } |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 806 | dst_release(&rt->dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | } |
| 808 | |
Daniel Walter | c3968a8 | 2011-04-13 21:10:57 +0000 | [diff] [blame] | 809 | /* clean up prefsrc entries */ |
| 810 | rt6_remove_prefsrc(ifp); |
Herbert Xu | 4c5ff6a | 2010-05-18 15:54:18 -0700 | [diff] [blame] | 811 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | in6_ifa_put(ifp); |
| 813 | } |
| 814 | |
| 815 | #ifdef CONFIG_IPV6_PRIVACY |
| 816 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) |
| 817 | { |
| 818 | struct inet6_dev *idev = ifp->idev; |
| 819 | struct in6_addr addr, *tmpaddr; |
Lorenzo Colitti | 76f793e | 2011-07-26 13:50:49 +0000 | [diff] [blame] | 820 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age; |
Benoit Boissinot | eac55bf | 2008-04-02 00:01:35 -0700 | [diff] [blame] | 821 | unsigned long regen_advance; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | int tmp_plen; |
| 823 | int ret = 0; |
| 824 | int max_addresses; |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 825 | u32 addr_flags; |
Lorenzo Colitti | 76f793e | 2011-07-26 13:50:49 +0000 | [diff] [blame] | 826 | unsigned long now = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | |
| 828 | write_lock(&idev->lock); |
| 829 | if (ift) { |
| 830 | spin_lock_bh(&ift->lock); |
| 831 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); |
| 832 | spin_unlock_bh(&ift->lock); |
| 833 | tmpaddr = &addr; |
| 834 | } else { |
| 835 | tmpaddr = NULL; |
| 836 | } |
| 837 | retry: |
| 838 | in6_dev_hold(idev); |
| 839 | if (idev->cnf.use_tempaddr <= 0) { |
| 840 | write_unlock(&idev->lock); |
| 841 | printk(KERN_INFO |
| 842 | "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); |
| 843 | in6_dev_put(idev); |
| 844 | ret = -1; |
| 845 | goto out; |
| 846 | } |
| 847 | spin_lock_bh(&ifp->lock); |
| 848 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { |
| 849 | idev->cnf.use_tempaddr = -1; /*XXX*/ |
| 850 | spin_unlock_bh(&ifp->lock); |
| 851 | write_unlock(&idev->lock); |
| 852 | printk(KERN_WARNING |
| 853 | "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); |
| 854 | in6_dev_put(idev); |
| 855 | ret = -1; |
| 856 | goto out; |
| 857 | } |
| 858 | in6_ifa_hold(ifp); |
| 859 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); |
| 860 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { |
| 861 | spin_unlock_bh(&ifp->lock); |
| 862 | write_unlock(&idev->lock); |
| 863 | printk(KERN_WARNING |
| 864 | "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); |
| 865 | in6_ifa_put(ifp); |
| 866 | in6_dev_put(idev); |
| 867 | ret = -1; |
| 868 | goto out; |
| 869 | } |
| 870 | memcpy(&addr.s6_addr[8], idev->rndid, 8); |
Lorenzo Colitti | 76f793e | 2011-07-26 13:50:49 +0000 | [diff] [blame] | 871 | age = (now - ifp->tstamp) / HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | tmp_valid_lft = min_t(__u32, |
| 873 | ifp->valid_lft, |
Glenn Wurster | 7a876b0 | 2010-09-27 07:10:10 +0000 | [diff] [blame] | 874 | idev->cnf.temp_valid_lft + age); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 875 | tmp_prefered_lft = min_t(__u32, |
| 876 | ifp->prefered_lft, |
Glenn Wurster | 7a876b0 | 2010-09-27 07:10:10 +0000 | [diff] [blame] | 877 | idev->cnf.temp_prefered_lft + age - |
Ben Hutchings | 784e271 | 2010-06-26 11:42:55 +0000 | [diff] [blame] | 878 | idev->cnf.max_desync_factor); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | tmp_plen = ifp->prefix_len; |
| 880 | max_addresses = idev->cnf.max_addresses; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | tmp_tstamp = ifp->tstamp; |
| 882 | spin_unlock_bh(&ifp->lock); |
| 883 | |
Benoit Boissinot | eac55bf | 2008-04-02 00:01:35 -0700 | [diff] [blame] | 884 | regen_advance = idev->cnf.regen_max_retry * |
| 885 | idev->cnf.dad_transmits * |
| 886 | idev->nd_parms->retrans_time / HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | write_unlock(&idev->lock); |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 888 | |
Benoit Boissinot | eac55bf | 2008-04-02 00:01:35 -0700 | [diff] [blame] | 889 | /* A temporary address is created only if this calculated Preferred |
| 890 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, |
| 891 | * an implementation must not create a temporary address with a zero |
| 892 | * Preferred Lifetime. |
| 893 | */ |
| 894 | if (tmp_prefered_lft <= regen_advance) { |
| 895 | in6_ifa_put(ifp); |
| 896 | in6_dev_put(idev); |
| 897 | ret = -1; |
| 898 | goto out; |
| 899 | } |
| 900 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 901 | addr_flags = IFA_F_TEMPORARY; |
| 902 | /* set in addrconf_prefix_rcv() */ |
| 903 | if (ifp->flags & IFA_F_OPTIMISTIC) |
| 904 | addr_flags |= IFA_F_OPTIMISTIC; |
| 905 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | ift = !max_addresses || |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 907 | ipv6_count_addresses(idev) < max_addresses ? |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 908 | ipv6_add_addr(idev, &addr, tmp_plen, |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 909 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, |
| 910 | addr_flags) : NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | if (!ift || IS_ERR(ift)) { |
| 912 | in6_ifa_put(ifp); |
| 913 | in6_dev_put(idev); |
| 914 | printk(KERN_INFO |
| 915 | "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); |
| 916 | tmpaddr = &addr; |
| 917 | write_lock(&idev->lock); |
| 918 | goto retry; |
| 919 | } |
| 920 | |
| 921 | spin_lock_bh(&ift->lock); |
| 922 | ift->ifpub = ifp; |
| 923 | ift->valid_lft = tmp_valid_lft; |
| 924 | ift->prefered_lft = tmp_prefered_lft; |
Lorenzo Colitti | 76f793e | 2011-07-26 13:50:49 +0000 | [diff] [blame] | 925 | ift->cstamp = now; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | ift->tstamp = tmp_tstamp; |
| 927 | spin_unlock_bh(&ift->lock); |
| 928 | |
| 929 | addrconf_dad_start(ift, 0); |
| 930 | in6_ifa_put(ift); |
| 931 | in6_dev_put(idev); |
| 932 | out: |
| 933 | return ret; |
| 934 | } |
| 935 | #endif |
| 936 | |
| 937 | /* |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 938 | * Choose an appropriate source address (RFC3484) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | */ |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 940 | enum { |
| 941 | IPV6_SADDR_RULE_INIT = 0, |
| 942 | IPV6_SADDR_RULE_LOCAL, |
| 943 | IPV6_SADDR_RULE_SCOPE, |
| 944 | IPV6_SADDR_RULE_PREFERRED, |
| 945 | #ifdef CONFIG_IPV6_MIP6 |
| 946 | IPV6_SADDR_RULE_HOA, |
| 947 | #endif |
| 948 | IPV6_SADDR_RULE_OIF, |
| 949 | IPV6_SADDR_RULE_LABEL, |
| 950 | #ifdef CONFIG_IPV6_PRIVACY |
| 951 | IPV6_SADDR_RULE_PRIVACY, |
| 952 | #endif |
| 953 | IPV6_SADDR_RULE_ORCHID, |
| 954 | IPV6_SADDR_RULE_PREFIX, |
| 955 | IPV6_SADDR_RULE_MAX |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 956 | }; |
| 957 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 958 | struct ipv6_saddr_score { |
| 959 | int rule; |
| 960 | int addr_type; |
| 961 | struct inet6_ifaddr *ifa; |
| 962 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); |
| 963 | int scopedist; |
| 964 | int matchlen; |
| 965 | }; |
| 966 | |
| 967 | struct ipv6_saddr_dst { |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 968 | const struct in6_addr *addr; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 969 | int ifindex; |
| 970 | int scope; |
| 971 | int label; |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 972 | unsigned int prefs; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 973 | }; |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 974 | |
Dave Jones | b6f99a2 | 2007-03-22 12:27:49 -0700 | [diff] [blame] | 975 | static inline int ipv6_saddr_preferred(int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | { |
Ulrich Weber | 45bb006 | 2010-02-25 23:28:58 +0000 | [diff] [blame] | 977 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK)) |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 978 | return 1; |
| 979 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | } |
| 981 | |
Benjamin Thery | 3de2325 | 2008-05-28 14:51:24 +0200 | [diff] [blame] | 982 | static int ipv6_get_saddr_eval(struct net *net, |
| 983 | struct ipv6_saddr_score *score, |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 984 | struct ipv6_saddr_dst *dst, |
| 985 | int i) |
| 986 | { |
| 987 | int ret; |
| 988 | |
| 989 | if (i <= score->rule) { |
| 990 | switch (i) { |
| 991 | case IPV6_SADDR_RULE_SCOPE: |
| 992 | ret = score->scopedist; |
| 993 | break; |
| 994 | case IPV6_SADDR_RULE_PREFIX: |
| 995 | ret = score->matchlen; |
| 996 | break; |
| 997 | default: |
| 998 | ret = !!test_bit(i, score->scorebits); |
| 999 | } |
| 1000 | goto out; |
| 1001 | } |
| 1002 | |
| 1003 | switch (i) { |
| 1004 | case IPV6_SADDR_RULE_INIT: |
| 1005 | /* Rule 0: remember if hiscore is not ready yet */ |
| 1006 | ret = !!score->ifa; |
| 1007 | break; |
| 1008 | case IPV6_SADDR_RULE_LOCAL: |
| 1009 | /* Rule 1: Prefer same address */ |
| 1010 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); |
| 1011 | break; |
| 1012 | case IPV6_SADDR_RULE_SCOPE: |
| 1013 | /* Rule 2: Prefer appropriate scope |
| 1014 | * |
| 1015 | * ret |
| 1016 | * ^ |
| 1017 | * -1 | d 15 |
| 1018 | * ---+--+-+---> scope |
| 1019 | * | |
| 1020 | * | d is scope of the destination. |
| 1021 | * B-d | \ |
| 1022 | * | \ <- smaller scope is better if |
| 1023 | * B-15 | \ if scope is enough for destinaion. |
| 1024 | * | ret = B - scope (-1 <= scope >= d <= 15). |
| 1025 | * d-C-1 | / |
| 1026 | * |/ <- greater is better |
| 1027 | * -C / if scope is not enough for destination. |
| 1028 | * /| ret = scope - C (-1 <= d < scope <= 15). |
| 1029 | * |
| 1030 | * d - C - 1 < B -15 (for all -1 <= d <= 15). |
| 1031 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. |
| 1032 | * Assume B = 0 and we get C > 29. |
| 1033 | */ |
| 1034 | ret = __ipv6_addr_src_scope(score->addr_type); |
| 1035 | if (ret >= dst->scope) |
| 1036 | ret = -ret; |
| 1037 | else |
| 1038 | ret -= 128; /* 30 is enough */ |
| 1039 | score->scopedist = ret; |
| 1040 | break; |
| 1041 | case IPV6_SADDR_RULE_PREFERRED: |
| 1042 | /* Rule 3: Avoid deprecated and optimistic addresses */ |
| 1043 | ret = ipv6_saddr_preferred(score->addr_type) || |
| 1044 | !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)); |
| 1045 | break; |
| 1046 | #ifdef CONFIG_IPV6_MIP6 |
| 1047 | case IPV6_SADDR_RULE_HOA: |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1048 | { |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1049 | /* Rule 4: Prefer home address */ |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1050 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
| 1051 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1052 | break; |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1053 | } |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1054 | #endif |
| 1055 | case IPV6_SADDR_RULE_OIF: |
| 1056 | /* Rule 5: Prefer outgoing interface */ |
| 1057 | ret = (!dst->ifindex || |
| 1058 | dst->ifindex == score->ifa->idev->dev->ifindex); |
| 1059 | break; |
| 1060 | case IPV6_SADDR_RULE_LABEL: |
| 1061 | /* Rule 6: Prefer matching label */ |
Benjamin Thery | 3de2325 | 2008-05-28 14:51:24 +0200 | [diff] [blame] | 1062 | ret = ipv6_addr_label(net, |
| 1063 | &score->ifa->addr, score->addr_type, |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1064 | score->ifa->idev->dev->ifindex) == dst->label; |
| 1065 | break; |
| 1066 | #ifdef CONFIG_IPV6_PRIVACY |
| 1067 | case IPV6_SADDR_RULE_PRIVACY: |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1068 | { |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1069 | /* Rule 7: Prefer public address |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1070 | * Note: prefer temporary address if use_tempaddr >= 2 |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1071 | */ |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1072 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
| 1073 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : |
| 1074 | score->ifa->idev->cnf.use_tempaddr >= 2; |
| 1075 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1076 | break; |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1077 | } |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1078 | #endif |
| 1079 | case IPV6_SADDR_RULE_ORCHID: |
| 1080 | /* Rule 8-: Prefer ORCHID vs ORCHID or |
| 1081 | * non-ORCHID vs non-ORCHID |
| 1082 | */ |
| 1083 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ |
| 1084 | ipv6_addr_orchid(dst->addr)); |
| 1085 | break; |
| 1086 | case IPV6_SADDR_RULE_PREFIX: |
| 1087 | /* Rule 8: Use longest matching prefix */ |
| 1088 | score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr, |
| 1089 | dst->addr); |
| 1090 | break; |
| 1091 | default: |
| 1092 | ret = 0; |
| 1093 | } |
| 1094 | |
| 1095 | if (ret) |
| 1096 | __set_bit(i, score->scorebits); |
| 1097 | score->rule = i; |
| 1098 | out: |
| 1099 | return ret; |
| 1100 | } |
| 1101 | |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 1102 | int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev, |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 1103 | const struct in6_addr *daddr, unsigned int prefs, |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1104 | struct in6_addr *saddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | { |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1106 | struct ipv6_saddr_score scores[2], |
| 1107 | *score = &scores[0], *hiscore = &scores[1]; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1108 | struct ipv6_saddr_dst dst; |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1109 | struct net_device *dev; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1110 | int dst_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1112 | dst_type = __ipv6_addr_type(daddr); |
| 1113 | dst.addr = daddr; |
| 1114 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; |
| 1115 | dst.scope = __ipv6_addr_src_scope(dst_type); |
Benjamin Thery | 3de2325 | 2008-05-28 14:51:24 +0200 | [diff] [blame] | 1116 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1117 | dst.prefs = prefs; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1118 | |
| 1119 | hiscore->rule = -1; |
| 1120 | hiscore->ifa = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1122 | rcu_read_lock(); |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1123 | |
Eric Dumazet | c6d14c8 | 2009-11-04 05:43:23 -0800 | [diff] [blame] | 1124 | for_each_netdev_rcu(net, dev) { |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1125 | struct inet6_dev *idev; |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1126 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1127 | /* Candidate Source Address (section 4) |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1128 | * - multicast and link-local destination address, |
| 1129 | * the set of candidate source address MUST only |
| 1130 | * include addresses assigned to interfaces |
| 1131 | * belonging to the same link as the outgoing |
| 1132 | * interface. |
| 1133 | * (- For site-local destination addresses, the |
| 1134 | * set of candidate source addresses MUST only |
| 1135 | * include addresses assigned to interfaces |
| 1136 | * belonging to the same site as the outgoing |
| 1137 | * interface.) |
| 1138 | */ |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1139 | if (((dst_type & IPV6_ADDR_MULTICAST) || |
| 1140 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && |
| 1141 | dst.ifindex && dev->ifindex != dst.ifindex) |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1142 | continue; |
| 1143 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | idev = __in6_dev_get(dev); |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1145 | if (!idev) |
| 1146 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1148 | read_lock_bh(&idev->lock); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 1149 | list_for_each_entry(score->ifa, &idev->addr_list, if_list) { |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1150 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1152 | /* |
YOSHIFUJI Hideaki | 6b3ae80 | 2005-12-21 22:58:01 +0900 | [diff] [blame] | 1153 | * - Tentative Address (RFC2462 section 5.4) |
| 1154 | * - A tentative address is not considered |
| 1155 | * "assigned to an interface" in the traditional |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1156 | * sense, unless it is also flagged as optimistic. |
YOSHIFUJI Hideaki | 6b3ae80 | 2005-12-21 22:58:01 +0900 | [diff] [blame] | 1157 | * - Candidate Source Address (section 4) |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1158 | * - In any case, anycast addresses, multicast |
| 1159 | * addresses, and the unspecified address MUST |
| 1160 | * NOT be included in a candidate set. |
| 1161 | */ |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1162 | if ((score->ifa->flags & IFA_F_TENTATIVE) && |
| 1163 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) |
YOSHIFUJI Hideaki | 6b3ae80 | 2005-12-21 22:58:01 +0900 | [diff] [blame] | 1164 | continue; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1165 | |
| 1166 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); |
| 1167 | |
| 1168 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || |
| 1169 | score->addr_type & IPV6_ADDR_MULTICAST)) { |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1170 | LIMIT_NETDEBUG(KERN_DEBUG |
Joe Perches | 3b6d821c | 2007-11-19 23:47:25 -0800 | [diff] [blame] | 1171 | "ADDRCONF: unspecified / multicast address " |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1172 | "assigned as unicast address on %s", |
| 1173 | dev->name); |
| 1174 | continue; |
| 1175 | } |
| 1176 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1177 | score->rule = -1; |
| 1178 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1179 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1180 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { |
| 1181 | int minihiscore, miniscore; |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1182 | |
Benjamin Thery | 3de2325 | 2008-05-28 14:51:24 +0200 | [diff] [blame] | 1183 | minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i); |
| 1184 | miniscore = ipv6_get_saddr_eval(net, score, &dst, i); |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1185 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1186 | if (minihiscore > miniscore) { |
| 1187 | if (i == IPV6_SADDR_RULE_SCOPE && |
| 1188 | score->scopedist > 0) { |
| 1189 | /* |
| 1190 | * special case: |
| 1191 | * each remaining entry |
| 1192 | * has too small (not enough) |
| 1193 | * scope, because ifa entries |
| 1194 | * are sorted by their scope |
| 1195 | * values. |
| 1196 | */ |
| 1197 | goto try_nextdev; |
| 1198 | } |
| 1199 | break; |
| 1200 | } else if (minihiscore < miniscore) { |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1201 | if (hiscore->ifa) |
| 1202 | in6_ifa_put(hiscore->ifa); |
| 1203 | |
| 1204 | in6_ifa_hold(score->ifa); |
| 1205 | |
Ilpo Järvinen | a0bffff | 2009-03-21 13:36:17 -0700 | [diff] [blame] | 1206 | swap(hiscore, score); |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1207 | |
| 1208 | /* restore our iterator */ |
| 1209 | score->ifa = hiscore->ifa; |
| 1210 | |
| 1211 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | } |
| 1213 | } |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1214 | } |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1215 | try_nextdev: |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1216 | read_unlock_bh(&idev->lock); |
| 1217 | } |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1218 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1219 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1220 | if (!hiscore->ifa) |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1221 | return -EADDRNOTAVAIL; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1222 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1223 | *saddr = hiscore->ifa->addr; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1224 | in6_ifa_put(hiscore->ifa); |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1225 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1226 | } |
YOSHIFUJI Hideaki | 5e5f3f0 | 2008-03-03 21:44:34 +0900 | [diff] [blame] | 1227 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1228 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1229 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
| 1230 | unsigned char banned_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | { |
| 1232 | struct inet6_dev *idev; |
| 1233 | int err = -EADDRNOTAVAIL; |
| 1234 | |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1235 | rcu_read_lock(); |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 1236 | idev = __in6_dev_get(dev); |
| 1237 | if (idev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1238 | struct inet6_ifaddr *ifp; |
| 1239 | |
| 1240 | read_lock_bh(&idev->lock); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 1241 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
| 1242 | if (ifp->scope == IFA_LINK && |
| 1243 | !(ifp->flags & banned_flags)) { |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1244 | *addr = ifp->addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1245 | err = 0; |
| 1246 | break; |
| 1247 | } |
| 1248 | } |
| 1249 | read_unlock_bh(&idev->lock); |
| 1250 | } |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1251 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | return err; |
| 1253 | } |
| 1254 | |
| 1255 | static int ipv6_count_addresses(struct inet6_dev *idev) |
| 1256 | { |
| 1257 | int cnt = 0; |
| 1258 | struct inet6_ifaddr *ifp; |
| 1259 | |
| 1260 | read_lock_bh(&idev->lock); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 1261 | list_for_each_entry(ifp, &idev->addr_list, if_list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | cnt++; |
| 1263 | read_unlock_bh(&idev->lock); |
| 1264 | return cnt; |
| 1265 | } |
| 1266 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1267 | int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
Daniel Lezcano | bfeade0 | 2008-01-10 22:43:18 -0800 | [diff] [blame] | 1268 | struct net_device *dev, int strict) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1269 | { |
Stephen Hemminger | eedf042 | 2010-05-17 22:27:12 -0700 | [diff] [blame] | 1270 | struct inet6_ifaddr *ifp; |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 1271 | struct hlist_node *node; |
stephen hemminger | 3a88a81 | 2010-03-17 20:31:12 +0000 | [diff] [blame] | 1272 | unsigned int hash = ipv6_addr_hash(addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 1274 | rcu_read_lock_bh(); |
| 1275 | hlist_for_each_entry_rcu(ifp, node, &inet6_addr_lst[hash], addr_lst) { |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 1276 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
Daniel Lezcano | bfeade0 | 2008-01-10 22:43:18 -0800 | [diff] [blame] | 1277 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1278 | if (ipv6_addr_equal(&ifp->addr, addr) && |
Stephen Hemminger | eedf042 | 2010-05-17 22:27:12 -0700 | [diff] [blame] | 1279 | !(ifp->flags&IFA_F_TENTATIVE) && |
| 1280 | (dev == NULL || ifp->idev->dev == dev || |
| 1281 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) { |
| 1282 | rcu_read_unlock_bh(); |
| 1283 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | } |
| 1285 | } |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 1286 | |
Stephen Hemminger | eedf042 | 2010-05-17 22:27:12 -0700 | [diff] [blame] | 1287 | rcu_read_unlock_bh(); |
| 1288 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | } |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 1290 | EXPORT_SYMBOL(ipv6_chk_addr); |
| 1291 | |
David S. Miller | 3e81c6d | 2010-03-20 16:18:00 -0700 | [diff] [blame] | 1292 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
| 1293 | struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1294 | { |
David S. Miller | 3e81c6d | 2010-03-20 16:18:00 -0700 | [diff] [blame] | 1295 | unsigned int hash = ipv6_addr_hash(addr); |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 1296 | struct inet6_ifaddr *ifp; |
| 1297 | struct hlist_node *node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1298 | |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 1299 | hlist_for_each_entry(ifp, node, &inet6_addr_lst[hash], addr_lst) { |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 1300 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
Daniel Lezcano | 06bfe65 | 2008-01-10 22:43:42 -0800 | [diff] [blame] | 1301 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1302 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
| 1303 | if (dev == NULL || ifp->idev->dev == dev) |
David S. Miller | 3e81c6d | 2010-03-20 16:18:00 -0700 | [diff] [blame] | 1304 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1305 | } |
| 1306 | } |
David S. Miller | 3e81c6d | 2010-03-20 16:18:00 -0700 | [diff] [blame] | 1307 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | } |
| 1309 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1310 | 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] | 1311 | { |
| 1312 | struct inet6_dev *idev; |
| 1313 | struct inet6_ifaddr *ifa; |
| 1314 | int onlink; |
| 1315 | |
| 1316 | onlink = 0; |
| 1317 | rcu_read_lock(); |
| 1318 | idev = __in6_dev_get(dev); |
| 1319 | if (idev) { |
| 1320 | read_lock_bh(&idev->lock); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 1321 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
YOSHIFUJI Hideaki | 52eeeb8 | 2008-03-15 22:54:23 -0400 | [diff] [blame] | 1322 | onlink = ipv6_prefix_equal(addr, &ifa->addr, |
| 1323 | ifa->prefix_len); |
| 1324 | if (onlink) |
| 1325 | break; |
| 1326 | } |
| 1327 | read_unlock_bh(&idev->lock); |
| 1328 | } |
| 1329 | rcu_read_unlock(); |
| 1330 | return onlink; |
| 1331 | } |
| 1332 | |
| 1333 | EXPORT_SYMBOL(ipv6_chk_prefix); |
| 1334 | |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 1335 | 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] | 1336 | struct net_device *dev, int strict) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1337 | { |
David S. Miller | b79d1d5 | 2010-03-25 21:39:21 -0700 | [diff] [blame] | 1338 | struct inet6_ifaddr *ifp, *result = NULL; |
stephen hemminger | 3a88a81 | 2010-03-17 20:31:12 +0000 | [diff] [blame] | 1339 | unsigned int hash = ipv6_addr_hash(addr); |
David S. Miller | b79d1d5 | 2010-03-25 21:39:21 -0700 | [diff] [blame] | 1340 | struct hlist_node *node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 1342 | rcu_read_lock_bh(); |
Eric Dumazet | 4f70ecc | 2010-05-03 10:50:14 +0000 | [diff] [blame] | 1343 | hlist_for_each_entry_rcu_bh(ifp, node, &inet6_addr_lst[hash], addr_lst) { |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 1344 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
Daniel Lezcano | 1cab3da | 2008-01-10 22:44:09 -0800 | [diff] [blame] | 1345 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
| 1347 | if (dev == NULL || ifp->idev->dev == dev || |
| 1348 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { |
David S. Miller | b79d1d5 | 2010-03-25 21:39:21 -0700 | [diff] [blame] | 1349 | result = ifp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1350 | in6_ifa_hold(ifp); |
| 1351 | break; |
| 1352 | } |
| 1353 | } |
| 1354 | } |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 1355 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | |
David S. Miller | b79d1d5 | 2010-03-25 21:39:21 -0700 | [diff] [blame] | 1357 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | } |
| 1359 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | /* Gets referenced address, destroys ifaddr */ |
| 1361 | |
Brian Haley | cc411d0 | 2009-09-09 14:41:32 +0000 | [diff] [blame] | 1362 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1364 | if (ifp->flags&IFA_F_PERMANENT) { |
| 1365 | spin_lock_bh(&ifp->lock); |
| 1366 | addrconf_del_timer(ifp); |
| 1367 | ifp->flags |= IFA_F_TENTATIVE; |
Brian Haley | cc411d0 | 2009-09-09 14:41:32 +0000 | [diff] [blame] | 1368 | if (dad_failed) |
| 1369 | ifp->flags |= IFA_F_DADFAILED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | spin_unlock_bh(&ifp->lock); |
Herbert Xu | e2577a0 | 2010-03-13 12:23:29 -0800 | [diff] [blame] | 1371 | if (dad_failed) |
| 1372 | ipv6_ifa_notify(0, ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1373 | in6_ifa_put(ifp); |
| 1374 | #ifdef CONFIG_IPV6_PRIVACY |
| 1375 | } else if (ifp->flags&IFA_F_TEMPORARY) { |
| 1376 | struct inet6_ifaddr *ifpub; |
| 1377 | spin_lock_bh(&ifp->lock); |
| 1378 | ifpub = ifp->ifpub; |
| 1379 | if (ifpub) { |
| 1380 | in6_ifa_hold(ifpub); |
| 1381 | spin_unlock_bh(&ifp->lock); |
| 1382 | ipv6_create_tempaddr(ifpub, ifp); |
| 1383 | in6_ifa_put(ifpub); |
| 1384 | } else { |
| 1385 | spin_unlock_bh(&ifp->lock); |
| 1386 | } |
| 1387 | ipv6_del_addr(ifp); |
| 1388 | #endif |
| 1389 | } else |
| 1390 | ipv6_del_addr(ifp); |
| 1391 | } |
| 1392 | |
Herbert Xu | f2344a1 | 2010-05-18 15:55:27 -0700 | [diff] [blame] | 1393 | static int addrconf_dad_end(struct inet6_ifaddr *ifp) |
| 1394 | { |
| 1395 | int err = -ENOENT; |
| 1396 | |
| 1397 | spin_lock(&ifp->state_lock); |
| 1398 | if (ifp->state == INET6_IFADDR_STATE_DAD) { |
| 1399 | ifp->state = INET6_IFADDR_STATE_POSTDAD; |
| 1400 | err = 0; |
| 1401 | } |
| 1402 | spin_unlock(&ifp->state_lock); |
| 1403 | |
| 1404 | return err; |
| 1405 | } |
| 1406 | |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 1407 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
| 1408 | { |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 1409 | struct inet6_dev *idev = ifp->idev; |
Brian Haley | 9bdd8d4 | 2009-03-18 18:22:48 -0700 | [diff] [blame] | 1410 | |
Ursula Braun | 853dc2e | 2010-10-24 23:06:43 +0000 | [diff] [blame] | 1411 | if (addrconf_dad_end(ifp)) { |
| 1412 | in6_ifa_put(ifp); |
Herbert Xu | f2344a1 | 2010-05-18 15:55:27 -0700 | [diff] [blame] | 1413 | return; |
Ursula Braun | 853dc2e | 2010-10-24 23:06:43 +0000 | [diff] [blame] | 1414 | } |
Herbert Xu | f2344a1 | 2010-05-18 15:55:27 -0700 | [diff] [blame] | 1415 | |
Brian Haley | 9bdd8d4 | 2009-03-18 18:22:48 -0700 | [diff] [blame] | 1416 | if (net_ratelimit()) |
Jens Rosenboom | 0522fea | 2009-09-17 10:24:24 -0700 | [diff] [blame] | 1417 | printk(KERN_INFO "%s: IPv6 duplicate address %pI6c detected!\n", |
| 1418 | ifp->idev->dev->name, &ifp->addr); |
Brian Haley | 9bdd8d4 | 2009-03-18 18:22:48 -0700 | [diff] [blame] | 1419 | |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 1420 | if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) { |
| 1421 | struct in6_addr addr; |
| 1422 | |
| 1423 | addr.s6_addr32[0] = htonl(0xfe800000); |
| 1424 | addr.s6_addr32[1] = 0; |
| 1425 | |
| 1426 | if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && |
| 1427 | ipv6_addr_equal(&ifp->addr, &addr)) { |
| 1428 | /* DAD failed for link-local based on MAC address */ |
| 1429 | idev->cnf.disable_ipv6 = 1; |
Brian Haley | 9bdd8d4 | 2009-03-18 18:22:48 -0700 | [diff] [blame] | 1430 | |
| 1431 | printk(KERN_INFO "%s: IPv6 being disabled!\n", |
| 1432 | ifp->idev->dev->name); |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 1433 | } |
| 1434 | } |
| 1435 | |
Brian Haley | cc411d0 | 2009-09-09 14:41:32 +0000 | [diff] [blame] | 1436 | addrconf_dad_stop(ifp, 1); |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 1437 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1438 | |
| 1439 | /* Join to solicited addr multicast group. */ |
| 1440 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1441 | 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] | 1442 | { |
| 1443 | struct in6_addr maddr; |
| 1444 | |
| 1445 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) |
| 1446 | return; |
| 1447 | |
| 1448 | addrconf_addr_solict_mult(addr, &maddr); |
| 1449 | ipv6_dev_mc_inc(dev, &maddr); |
| 1450 | } |
| 1451 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1452 | 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] | 1453 | { |
| 1454 | struct in6_addr maddr; |
| 1455 | |
| 1456 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) |
| 1457 | return; |
| 1458 | |
| 1459 | addrconf_addr_solict_mult(addr, &maddr); |
| 1460 | __ipv6_dev_mc_dec(idev, &maddr); |
| 1461 | } |
| 1462 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 1463 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1464 | { |
| 1465 | struct in6_addr addr; |
Bjørn Mork | 2bda8a0 | 2011-07-05 23:04:13 +0000 | [diff] [blame] | 1466 | if (ifp->prefix_len == 127) /* RFC 6164 */ |
| 1467 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1468 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
| 1469 | if (ipv6_addr_any(&addr)) |
| 1470 | return; |
| 1471 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); |
| 1472 | } |
| 1473 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 1474 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1475 | { |
| 1476 | struct in6_addr addr; |
YOSHIFUJI Hideaki | 32019e6 | 2011-07-24 11:44:34 +0000 | [diff] [blame] | 1477 | if (ifp->prefix_len == 127) /* RFC 6164 */ |
| 1478 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
| 1480 | if (ipv6_addr_any(&addr)) |
| 1481 | return; |
| 1482 | __ipv6_dev_ac_dec(ifp->idev, &addr); |
| 1483 | } |
| 1484 | |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 1485 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
| 1486 | { |
| 1487 | if (dev->addr_len != ETH_ALEN) |
| 1488 | return -1; |
| 1489 | memcpy(eui, dev->dev_addr, 3); |
| 1490 | memcpy(eui + 5, dev->dev_addr + 3, 3); |
| 1491 | |
| 1492 | /* |
| 1493 | * The zSeries OSA network cards can be shared among various |
| 1494 | * OS instances, but the OSA cards have only one MAC address. |
| 1495 | * This leads to duplicate address conflicts in conjunction |
| 1496 | * with IPv6 if more than one instance uses the same card. |
| 1497 | * |
| 1498 | * The driver for these cards can deliver a unique 16-bit |
| 1499 | * identifier for each instance sharing the same card. It is |
| 1500 | * placed instead of 0xFFFE in the interface identifier. The |
| 1501 | * "u" bit of the interface identifier is not inverted in this |
| 1502 | * case. Hence the resulting interface identifier has local |
| 1503 | * scope according to RFC2373. |
| 1504 | */ |
| 1505 | if (dev->dev_id) { |
| 1506 | eui[3] = (dev->dev_id >> 8) & 0xFF; |
| 1507 | eui[4] = dev->dev_id & 0xFF; |
| 1508 | } else { |
| 1509 | eui[3] = 0xFF; |
| 1510 | eui[4] = 0xFE; |
| 1511 | eui[0] ^= 2; |
| 1512 | } |
| 1513 | return 0; |
| 1514 | } |
| 1515 | |
| 1516 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) |
| 1517 | { |
| 1518 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ |
| 1519 | if (dev->addr_len != ARCNET_ALEN) |
| 1520 | return -1; |
| 1521 | memset(eui, 0, 7); |
| 1522 | eui[7] = *(u8*)dev->dev_addr; |
| 1523 | return 0; |
| 1524 | } |
| 1525 | |
| 1526 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) |
| 1527 | { |
| 1528 | if (dev->addr_len != INFINIBAND_ALEN) |
| 1529 | return -1; |
| 1530 | memcpy(eui, dev->dev_addr + 12, 8); |
| 1531 | eui[0] |= 2; |
| 1532 | return 0; |
| 1533 | } |
| 1534 | |
stephen hemminger | c61393e | 2010-10-04 20:17:53 +0000 | [diff] [blame] | 1535 | static int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
YOSHIFUJI Hideaki | dfd982b | 2008-04-10 15:42:09 +0900 | [diff] [blame] | 1536 | { |
Sascha Hlusiak | 9af2851 | 2009-05-19 12:56:51 +0000 | [diff] [blame] | 1537 | if (addr == 0) |
| 1538 | return -1; |
YOSHIFUJI Hideaki | dfd982b | 2008-04-10 15:42:09 +0900 | [diff] [blame] | 1539 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || |
| 1540 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || |
| 1541 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || |
| 1542 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || |
| 1543 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || |
| 1544 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; |
| 1545 | eui[1] = 0; |
| 1546 | eui[2] = 0x5E; |
| 1547 | eui[3] = 0xFE; |
| 1548 | memcpy(eui + 4, &addr, 4); |
| 1549 | return 0; |
| 1550 | } |
YOSHIFUJI Hideaki | dfd982b | 2008-04-10 15:42:09 +0900 | [diff] [blame] | 1551 | |
| 1552 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) |
| 1553 | { |
| 1554 | if (dev->priv_flags & IFF_ISATAP) |
| 1555 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); |
| 1556 | return -1; |
| 1557 | } |
| 1558 | |
stephen hemminger | aee80b5 | 2011-06-08 10:44:30 +0000 | [diff] [blame] | 1559 | static int addrconf_ifid_gre(u8 *eui, struct net_device *dev) |
| 1560 | { |
| 1561 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); |
| 1562 | } |
| 1563 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1564 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
| 1565 | { |
| 1566 | switch (dev->type) { |
| 1567 | case ARPHRD_ETHER: |
| 1568 | case ARPHRD_FDDI: |
| 1569 | case ARPHRD_IEEE802_TR: |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 1570 | return addrconf_ifid_eui48(eui, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1571 | case ARPHRD_ARCNET: |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 1572 | return addrconf_ifid_arcnet(eui, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1573 | case ARPHRD_INFINIBAND: |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 1574 | return addrconf_ifid_infiniband(eui, dev); |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 1575 | case ARPHRD_SIT: |
YOSHIFUJI Hideaki | dfd982b | 2008-04-10 15:42:09 +0900 | [diff] [blame] | 1576 | return addrconf_ifid_sit(eui, dev); |
stephen hemminger | aee80b5 | 2011-06-08 10:44:30 +0000 | [diff] [blame] | 1577 | case ARPHRD_IPGRE: |
| 1578 | return addrconf_ifid_gre(eui, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1579 | } |
| 1580 | return -1; |
| 1581 | } |
| 1582 | |
| 1583 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) |
| 1584 | { |
| 1585 | int err = -1; |
| 1586 | struct inet6_ifaddr *ifp; |
| 1587 | |
| 1588 | read_lock_bh(&idev->lock); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 1589 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1590 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { |
| 1591 | memcpy(eui, ifp->addr.s6_addr+8, 8); |
| 1592 | err = 0; |
| 1593 | break; |
| 1594 | } |
| 1595 | } |
| 1596 | read_unlock_bh(&idev->lock); |
| 1597 | return err; |
| 1598 | } |
| 1599 | |
| 1600 | #ifdef CONFIG_IPV6_PRIVACY |
| 1601 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ |
| 1602 | static int __ipv6_regen_rndid(struct inet6_dev *idev) |
| 1603 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1604 | regen: |
YOSHIFUJI Hideaki | 955189e | 2006-03-20 16:54:09 -0800 | [diff] [blame] | 1605 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1606 | idev->rndid[0] &= ~0x02; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1607 | |
| 1608 | /* |
| 1609 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: |
| 1610 | * check if generated address is not inappropriate |
| 1611 | * |
| 1612 | * - Reserved subnet anycast (RFC 2526) |
| 1613 | * 11111101 11....11 1xxxxxxx |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 1614 | * - ISATAP (RFC4214) 6.1 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1615 | * 00-00-5E-FE-xx-xx-xx-xx |
| 1616 | * - value 0 |
| 1617 | * - XXX: already assigned to an address on the device |
| 1618 | */ |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1619 | if (idev->rndid[0] == 0xfd && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1620 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
| 1621 | (idev->rndid[7]&0x80)) |
| 1622 | goto regen; |
| 1623 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { |
| 1624 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) |
| 1625 | goto regen; |
| 1626 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) |
| 1627 | goto regen; |
| 1628 | } |
| 1629 | |
| 1630 | return 0; |
| 1631 | } |
| 1632 | |
| 1633 | static void ipv6_regen_rndid(unsigned long data) |
| 1634 | { |
| 1635 | struct inet6_dev *idev = (struct inet6_dev *) data; |
| 1636 | unsigned long expires; |
| 1637 | |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1638 | rcu_read_lock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1639 | write_lock_bh(&idev->lock); |
| 1640 | |
| 1641 | if (idev->dead) |
| 1642 | goto out; |
| 1643 | |
| 1644 | if (__ipv6_regen_rndid(idev) < 0) |
| 1645 | goto out; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1646 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1647 | expires = jiffies + |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1648 | idev->cnf.temp_prefered_lft * HZ - |
Ben Hutchings | 784e271 | 2010-06-26 11:42:55 +0000 | [diff] [blame] | 1649 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - |
| 1650 | idev->cnf.max_desync_factor * HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1651 | if (time_before(expires, jiffies)) { |
| 1652 | printk(KERN_WARNING |
| 1653 | "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", |
| 1654 | idev->dev->name); |
| 1655 | goto out; |
| 1656 | } |
| 1657 | |
| 1658 | if (!mod_timer(&idev->regen_timer, expires)) |
| 1659 | in6_dev_hold(idev); |
| 1660 | |
| 1661 | out: |
| 1662 | write_unlock_bh(&idev->lock); |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1663 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1664 | in6_dev_put(idev); |
| 1665 | } |
| 1666 | |
| 1667 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { |
| 1668 | int ret = 0; |
| 1669 | |
| 1670 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) |
| 1671 | ret = __ipv6_regen_rndid(idev); |
| 1672 | return ret; |
| 1673 | } |
| 1674 | #endif |
| 1675 | |
| 1676 | /* |
| 1677 | * Add prefix route. |
| 1678 | */ |
| 1679 | |
| 1680 | static void |
| 1681 | 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] | 1682 | unsigned long expires, u32 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1683 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1684 | struct fib6_config cfg = { |
| 1685 | .fc_table = RT6_TABLE_PREFIX, |
| 1686 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
| 1687 | .fc_ifindex = dev->ifindex, |
| 1688 | .fc_expires = expires, |
| 1689 | .fc_dst_len = plen, |
| 1690 | .fc_flags = RTF_UP | flags, |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1691 | .fc_nlinfo.nl_net = dev_net(dev), |
Stephen Hemminger | f410a1f | 2008-08-23 05:16:46 -0700 | [diff] [blame] | 1692 | .fc_protocol = RTPROT_KERNEL, |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1693 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1694 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1695 | cfg.fc_dst = *pfx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1696 | |
| 1697 | /* Prevent useless cloning on PtP SIT. |
| 1698 | This thing is done here expecting that the whole |
| 1699 | class of non-broadcast devices need not cloning. |
| 1700 | */ |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 1701 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1702 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
| 1703 | cfg.fc_flags |= RTF_NONEXTHOP; |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 1704 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1705 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1706 | ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1707 | } |
| 1708 | |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 1709 | |
| 1710 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, |
| 1711 | int plen, |
| 1712 | const struct net_device *dev, |
| 1713 | u32 flags, u32 noflags) |
| 1714 | { |
| 1715 | struct fib6_node *fn; |
| 1716 | struct rt6_info *rt = NULL; |
| 1717 | struct fib6_table *table; |
| 1718 | |
| 1719 | table = fib6_get_table(dev_net(dev), RT6_TABLE_PREFIX); |
| 1720 | if (table == NULL) |
| 1721 | return NULL; |
| 1722 | |
| 1723 | write_lock_bh(&table->tb6_lock); |
| 1724 | fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0); |
| 1725 | if (!fn) |
| 1726 | goto out; |
| 1727 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 1728 | if (rt->dst.dev->ifindex != dev->ifindex) |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 1729 | continue; |
| 1730 | if ((rt->rt6i_flags & flags) != flags) |
| 1731 | continue; |
| 1732 | if ((noflags != 0) && ((rt->rt6i_flags & flags) != 0)) |
| 1733 | continue; |
| 1734 | dst_hold(&rt->dst); |
| 1735 | break; |
| 1736 | } |
| 1737 | out: |
| 1738 | write_unlock_bh(&table->tb6_lock); |
| 1739 | return rt; |
| 1740 | } |
| 1741 | |
| 1742 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1743 | /* Create "default" multicast route to the interface */ |
| 1744 | |
| 1745 | static void addrconf_add_mroute(struct net_device *dev) |
| 1746 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1747 | struct fib6_config cfg = { |
| 1748 | .fc_table = RT6_TABLE_LOCAL, |
| 1749 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
| 1750 | .fc_ifindex = dev->ifindex, |
| 1751 | .fc_dst_len = 8, |
| 1752 | .fc_flags = RTF_UP, |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1753 | .fc_nlinfo.nl_net = dev_net(dev), |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1754 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1755 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1756 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); |
| 1757 | |
| 1758 | ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1759 | } |
| 1760 | |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 1761 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1762 | static void sit_route_add(struct net_device *dev) |
| 1763 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1764 | struct fib6_config cfg = { |
| 1765 | .fc_table = RT6_TABLE_MAIN, |
| 1766 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
| 1767 | .fc_ifindex = dev->ifindex, |
| 1768 | .fc_dst_len = 96, |
| 1769 | .fc_flags = RTF_UP | RTF_NONEXTHOP, |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1770 | .fc_nlinfo.nl_net = dev_net(dev), |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1771 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1772 | |
| 1773 | /* prefix length - 96 bits "::d.d.d.d" */ |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1774 | ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1775 | } |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 1776 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1777 | |
| 1778 | static void addrconf_add_lroute(struct net_device *dev) |
| 1779 | { |
| 1780 | struct in6_addr addr; |
| 1781 | |
| 1782 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); |
| 1783 | addrconf_prefix_route(&addr, 64, dev, 0, 0); |
| 1784 | } |
| 1785 | |
| 1786 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) |
| 1787 | { |
| 1788 | struct inet6_dev *idev; |
| 1789 | |
| 1790 | ASSERT_RTNL(); |
| 1791 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 1792 | idev = ipv6_find_idev(dev); |
| 1793 | if (!idev) |
Brian Haley | 64e724f | 2010-07-20 10:34:30 +0000 | [diff] [blame] | 1794 | return ERR_PTR(-ENOBUFS); |
| 1795 | |
| 1796 | if (idev->cnf.disable_ipv6) |
| 1797 | return ERR_PTR(-EACCES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1798 | |
| 1799 | /* Add default multicast route */ |
Li Wei | 4af04ab | 2011-12-06 21:23:45 +0000 | [diff] [blame] | 1800 | if (!(dev->flags & IFF_LOOPBACK)) |
| 1801 | addrconf_add_mroute(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1802 | |
| 1803 | /* Add link local route */ |
| 1804 | addrconf_add_lroute(dev); |
| 1805 | return idev; |
| 1806 | } |
| 1807 | |
Neil Horman | e6bff99 | 2012-01-04 10:49:15 +0000 | [diff] [blame] | 1808 | 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] | 1809 | { |
| 1810 | struct prefix_info *pinfo; |
| 1811 | __u32 valid_lft; |
| 1812 | __u32 prefered_lft; |
| 1813 | int addr_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1814 | struct inet6_dev *in6_dev; |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 1815 | struct net *net = dev_net(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1816 | |
| 1817 | pinfo = (struct prefix_info *) opt; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1818 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1819 | if (len < sizeof(struct prefix_info)) { |
| 1820 | ADBG(("addrconf: prefix option too short\n")); |
| 1821 | return; |
| 1822 | } |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1823 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1824 | /* |
| 1825 | * Validation checks ([ADDRCONF], page 19) |
| 1826 | */ |
| 1827 | |
| 1828 | addr_type = ipv6_addr_type(&pinfo->prefix); |
| 1829 | |
| 1830 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) |
| 1831 | return; |
| 1832 | |
| 1833 | valid_lft = ntohl(pinfo->valid); |
| 1834 | prefered_lft = ntohl(pinfo->prefered); |
| 1835 | |
| 1836 | if (prefered_lft > valid_lft) { |
| 1837 | if (net_ratelimit()) |
| 1838 | printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); |
| 1839 | return; |
| 1840 | } |
| 1841 | |
| 1842 | in6_dev = in6_dev_get(dev); |
| 1843 | |
| 1844 | if (in6_dev == NULL) { |
| 1845 | if (net_ratelimit()) |
| 1846 | printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); |
| 1847 | return; |
| 1848 | } |
| 1849 | |
| 1850 | /* |
| 1851 | * Two things going on here: |
| 1852 | * 1) Add routes for on-link prefixes |
| 1853 | * 2) Configure prefixes with the auto flag set |
| 1854 | */ |
| 1855 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 1856 | if (pinfo->onlink) { |
| 1857 | struct rt6_info *rt; |
| 1858 | unsigned long rt_expires; |
| 1859 | |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 1860 | /* Avoid arithmetic overflow. Really, we could |
| 1861 | * save rt_expires in seconds, likely valid_lft, |
| 1862 | * but it would require division in fib gc, that it |
| 1863 | * not good. |
| 1864 | */ |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 1865 | if (HZ > USER_HZ) |
| 1866 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); |
| 1867 | else |
| 1868 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); |
YOSHIFUJI Hideaki | 3dd4bc6 | 2005-12-19 14:02:45 -0800 | [diff] [blame] | 1869 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 1870 | if (addrconf_finite_timeout(rt_expires)) |
| 1871 | rt_expires *= HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1872 | |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 1873 | rt = addrconf_get_prefix_route(&pinfo->prefix, |
| 1874 | pinfo->prefix_len, |
| 1875 | dev, |
| 1876 | RTF_ADDRCONF | RTF_PREFIX_RT, |
| 1877 | RTF_GATEWAY | RTF_DEFAULT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1878 | |
Andreas Hofmeister | 14ef37b | 2011-10-26 03:24:29 +0000 | [diff] [blame] | 1879 | if (rt) { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 1880 | /* Autoconf prefix route */ |
| 1881 | if (valid_lft == 0) { |
| 1882 | ip6_del_rt(rt); |
| 1883 | rt = NULL; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 1884 | } else if (addrconf_finite_timeout(rt_expires)) { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 1885 | /* not infinity */ |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 1886 | rt->dst.expires = jiffies + rt_expires; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 1887 | rt->rt6i_flags |= RTF_EXPIRES; |
| 1888 | } else { |
| 1889 | rt->rt6i_flags &= ~RTF_EXPIRES; |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 1890 | rt->dst.expires = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1891 | } |
| 1892 | } else if (valid_lft) { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 1893 | clock_t expires = 0; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 1894 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
| 1895 | if (addrconf_finite_timeout(rt_expires)) { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 1896 | /* not infinity */ |
| 1897 | flags |= RTF_EXPIRES; |
| 1898 | expires = jiffies_to_clock_t(rt_expires); |
| 1899 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1900 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 1901 | dev, expires, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1902 | } |
| 1903 | if (rt) |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1904 | dst_release(&rt->dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1905 | } |
| 1906 | |
| 1907 | /* Try to figure out our local address for this prefix */ |
| 1908 | |
| 1909 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { |
| 1910 | struct inet6_ifaddr * ifp; |
| 1911 | struct in6_addr addr; |
| 1912 | int create = 0, update_lft = 0; |
| 1913 | |
| 1914 | if (pinfo->prefix_len == 64) { |
| 1915 | memcpy(&addr, &pinfo->prefix, 8); |
| 1916 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && |
| 1917 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { |
| 1918 | in6_dev_put(in6_dev); |
| 1919 | return; |
| 1920 | } |
| 1921 | goto ok; |
| 1922 | } |
| 1923 | if (net_ratelimit()) |
| 1924 | printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", |
| 1925 | pinfo->prefix_len); |
| 1926 | in6_dev_put(in6_dev); |
| 1927 | return; |
| 1928 | |
| 1929 | ok: |
| 1930 | |
YOSHIFUJI Hideaki | 53b7997 | 2008-07-19 22:35:03 -0700 | [diff] [blame] | 1931 | ifp = ipv6_get_ifaddr(net, &addr, dev, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1932 | |
| 1933 | if (ifp == NULL && valid_lft) { |
| 1934 | int max_addresses = in6_dev->cnf.max_addresses; |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1935 | u32 addr_flags = 0; |
| 1936 | |
| 1937 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 1938 | if (in6_dev->cnf.optimistic_dad && |
Neil Horman | e6bff99 | 2012-01-04 10:49:15 +0000 | [diff] [blame] | 1939 | !net->ipv6.devconf_all->forwarding && sllao) |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1940 | addr_flags = IFA_F_OPTIMISTIC; |
| 1941 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1942 | |
| 1943 | /* Do not allow to create too much of autoconfigured |
| 1944 | * addresses; this would be too easy way to crash kernel. |
| 1945 | */ |
| 1946 | if (!max_addresses || |
| 1947 | ipv6_count_addresses(in6_dev) < max_addresses) |
| 1948 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1949 | addr_type&IPV6_ADDR_SCOPE_MASK, |
| 1950 | addr_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1951 | |
| 1952 | if (!ifp || IS_ERR(ifp)) { |
| 1953 | in6_dev_put(in6_dev); |
| 1954 | return; |
| 1955 | } |
| 1956 | |
| 1957 | update_lft = create = 1; |
| 1958 | ifp->cstamp = jiffies; |
| 1959 | addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); |
| 1960 | } |
| 1961 | |
| 1962 | if (ifp) { |
| 1963 | int flags; |
| 1964 | unsigned long now; |
| 1965 | #ifdef CONFIG_IPV6_PRIVACY |
| 1966 | struct inet6_ifaddr *ift; |
| 1967 | #endif |
| 1968 | u32 stored_lft; |
| 1969 | |
| 1970 | /* update lifetime (RFC2462 5.5.3 e) */ |
| 1971 | spin_lock(&ifp->lock); |
| 1972 | now = jiffies; |
| 1973 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) |
| 1974 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; |
| 1975 | else |
| 1976 | stored_lft = 0; |
| 1977 | if (!update_lft && stored_lft) { |
| 1978 | if (valid_lft > MIN_VALID_LIFETIME || |
| 1979 | valid_lft > stored_lft) |
| 1980 | update_lft = 1; |
| 1981 | else if (stored_lft <= MIN_VALID_LIFETIME) { |
| 1982 | /* valid_lft <= stored_lft is always true */ |
Brian Haley | a1ed052 | 2009-07-02 07:10:52 +0000 | [diff] [blame] | 1983 | /* |
| 1984 | * RFC 4862 Section 5.5.3e: |
| 1985 | * "Note that the preferred lifetime of |
| 1986 | * the corresponding address is always |
| 1987 | * reset to the Preferred Lifetime in |
| 1988 | * the received Prefix Information |
| 1989 | * option, regardless of whether the |
| 1990 | * valid lifetime is also reset or |
| 1991 | * ignored." |
| 1992 | * |
| 1993 | * So if the preferred lifetime in |
| 1994 | * this advertisement is different |
| 1995 | * than what we have stored, but the |
| 1996 | * valid lifetime is invalid, just |
| 1997 | * reset prefered_lft. |
| 1998 | * |
| 1999 | * We must set the valid lifetime |
| 2000 | * to the stored lifetime since we'll |
| 2001 | * be updating the timestamp below, |
| 2002 | * else we'll set it back to the |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 2003 | * minimum. |
Brian Haley | a1ed052 | 2009-07-02 07:10:52 +0000 | [diff] [blame] | 2004 | */ |
| 2005 | if (prefered_lft != ifp->prefered_lft) { |
| 2006 | valid_lft = stored_lft; |
| 2007 | update_lft = 1; |
| 2008 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2009 | } else { |
| 2010 | valid_lft = MIN_VALID_LIFETIME; |
| 2011 | if (valid_lft < prefered_lft) |
| 2012 | prefered_lft = valid_lft; |
| 2013 | update_lft = 1; |
| 2014 | } |
| 2015 | } |
| 2016 | |
| 2017 | if (update_lft) { |
| 2018 | ifp->valid_lft = valid_lft; |
| 2019 | ifp->prefered_lft = prefered_lft; |
| 2020 | ifp->tstamp = now; |
| 2021 | flags = ifp->flags; |
| 2022 | ifp->flags &= ~IFA_F_DEPRECATED; |
| 2023 | spin_unlock(&ifp->lock); |
| 2024 | |
| 2025 | if (!(flags&IFA_F_TENTATIVE)) |
| 2026 | ipv6_ifa_notify(0, ifp); |
| 2027 | } else |
| 2028 | spin_unlock(&ifp->lock); |
| 2029 | |
| 2030 | #ifdef CONFIG_IPV6_PRIVACY |
| 2031 | read_lock_bh(&in6_dev->lock); |
| 2032 | /* update all temporary addresses in the list */ |
Lorenzo Colitti | 76f793e | 2011-07-26 13:50:49 +0000 | [diff] [blame] | 2033 | list_for_each_entry(ift, &in6_dev->tempaddr_list, |
| 2034 | tmp_list) { |
| 2035 | int age, max_valid, max_prefered; |
| 2036 | |
Benoit Boissinot | c6fbfac | 2008-04-02 00:00:58 -0700 | [diff] [blame] | 2037 | if (ifp != ift->ifpub) |
| 2038 | continue; |
| 2039 | |
Lorenzo Colitti | 76f793e | 2011-07-26 13:50:49 +0000 | [diff] [blame] | 2040 | /* |
| 2041 | * RFC 4941 section 3.3: |
| 2042 | * If a received option will extend the lifetime |
| 2043 | * of a public address, the lifetimes of |
| 2044 | * temporary addresses should be extended, |
| 2045 | * subject to the overall constraint that no |
| 2046 | * temporary addresses should ever remain |
| 2047 | * "valid" or "preferred" for a time longer than |
| 2048 | * (TEMP_VALID_LIFETIME) or |
| 2049 | * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), |
| 2050 | * respectively. |
| 2051 | */ |
| 2052 | age = (now - ift->cstamp) / HZ; |
| 2053 | max_valid = in6_dev->cnf.temp_valid_lft - age; |
| 2054 | if (max_valid < 0) |
| 2055 | max_valid = 0; |
| 2056 | |
| 2057 | max_prefered = in6_dev->cnf.temp_prefered_lft - |
| 2058 | in6_dev->cnf.max_desync_factor - |
| 2059 | age; |
| 2060 | if (max_prefered < 0) |
| 2061 | max_prefered = 0; |
| 2062 | |
| 2063 | if (valid_lft > max_valid) |
| 2064 | valid_lft = max_valid; |
| 2065 | |
| 2066 | if (prefered_lft > max_prefered) |
| 2067 | prefered_lft = max_prefered; |
| 2068 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2069 | spin_lock(&ift->lock); |
| 2070 | flags = ift->flags; |
Lorenzo Colitti | 76f793e | 2011-07-26 13:50:49 +0000 | [diff] [blame] | 2071 | ift->valid_lft = valid_lft; |
| 2072 | ift->prefered_lft = prefered_lft; |
| 2073 | ift->tstamp = now; |
| 2074 | if (prefered_lft > 0) |
| 2075 | ift->flags &= ~IFA_F_DEPRECATED; |
| 2076 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2077 | spin_unlock(&ift->lock); |
| 2078 | if (!(flags&IFA_F_TENTATIVE)) |
| 2079 | ipv6_ifa_notify(0, ift); |
| 2080 | } |
| 2081 | |
Glenn Wurster | aed6550 | 2010-09-27 07:04:30 +0000 | [diff] [blame] | 2082 | 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] | 2083 | /* |
Lorenzo Colitti | 76f793e | 2011-07-26 13:50:49 +0000 | [diff] [blame] | 2084 | * When a new public address is created as |
| 2085 | * described in [ADDRCONF], also create a new |
| 2086 | * temporary address. Also create a temporary |
| 2087 | * address if it's enabled but no temporary |
| 2088 | * address currently exists. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2089 | */ |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2090 | read_unlock_bh(&in6_dev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2091 | ipv6_create_tempaddr(ifp, NULL); |
| 2092 | } else { |
| 2093 | read_unlock_bh(&in6_dev->lock); |
| 2094 | } |
| 2095 | #endif |
| 2096 | in6_ifa_put(ifp); |
| 2097 | addrconf_verify(0); |
| 2098 | } |
| 2099 | } |
| 2100 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); |
| 2101 | in6_dev_put(in6_dev); |
| 2102 | } |
| 2103 | |
| 2104 | /* |
| 2105 | * Set destination address. |
| 2106 | * Special case for SIT interfaces where we create a new "virtual" |
| 2107 | * device. |
| 2108 | */ |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2109 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2110 | { |
| 2111 | struct in6_ifreq ireq; |
| 2112 | struct net_device *dev; |
| 2113 | int err = -EINVAL; |
| 2114 | |
| 2115 | rtnl_lock(); |
| 2116 | |
| 2117 | err = -EFAULT; |
| 2118 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
| 2119 | goto err_exit; |
| 2120 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2121 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2122 | |
| 2123 | err = -ENODEV; |
| 2124 | if (dev == NULL) |
| 2125 | goto err_exit; |
| 2126 | |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2127 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2128 | if (dev->type == ARPHRD_SIT) { |
Stephen Hemminger | 5bc3eb7 | 2008-11-19 21:52:05 -0800 | [diff] [blame] | 2129 | const struct net_device_ops *ops = dev->netdev_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2130 | struct ifreq ifr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2131 | struct ip_tunnel_parm p; |
| 2132 | |
| 2133 | err = -EADDRNOTAVAIL; |
| 2134 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) |
| 2135 | goto err_exit; |
| 2136 | |
| 2137 | memset(&p, 0, sizeof(p)); |
| 2138 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; |
| 2139 | p.iph.saddr = 0; |
| 2140 | p.iph.version = 4; |
| 2141 | p.iph.ihl = 5; |
| 2142 | p.iph.protocol = IPPROTO_IPV6; |
| 2143 | p.iph.ttl = 64; |
Stephen Hemminger | d20b310 | 2008-01-21 00:48:43 -0800 | [diff] [blame] | 2144 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2145 | |
Stephen Hemminger | 5bc3eb7 | 2008-11-19 21:52:05 -0800 | [diff] [blame] | 2146 | if (ops->ndo_do_ioctl) { |
| 2147 | mm_segment_t oldfs = get_fs(); |
| 2148 | |
| 2149 | set_fs(KERNEL_DS); |
| 2150 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); |
| 2151 | set_fs(oldfs); |
| 2152 | } else |
| 2153 | err = -EOPNOTSUPP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2154 | |
| 2155 | if (err == 0) { |
| 2156 | err = -ENOBUFS; |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2157 | dev = __dev_get_by_name(net, p.name); |
| 2158 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2159 | goto err_exit; |
| 2160 | err = dev_open(dev); |
| 2161 | } |
| 2162 | } |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2163 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2164 | |
| 2165 | err_exit: |
| 2166 | rtnl_unlock(); |
| 2167 | return err; |
| 2168 | } |
| 2169 | |
| 2170 | /* |
| 2171 | * Manual configuration of address on an interface |
| 2172 | */ |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 2173 | static int inet6_addr_add(struct net *net, int ifindex, const struct in6_addr *pfx, |
Thomas Graf | 24ef0da | 2008-05-28 16:54:22 +0200 | [diff] [blame] | 2174 | unsigned int plen, __u8 ifa_flags, __u32 prefered_lft, |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2175 | __u32 valid_lft) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2176 | { |
| 2177 | struct inet6_ifaddr *ifp; |
| 2178 | struct inet6_dev *idev; |
| 2179 | struct net_device *dev; |
| 2180 | int scope; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2181 | u32 flags; |
| 2182 | clock_t expires; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2183 | unsigned long timeout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2184 | |
| 2185 | ASSERT_RTNL(); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2186 | |
Thomas Graf | 24ef0da | 2008-05-28 16:54:22 +0200 | [diff] [blame] | 2187 | if (plen > 128) |
| 2188 | return -EINVAL; |
| 2189 | |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2190 | /* check the lifetime */ |
| 2191 | if (!valid_lft || prefered_lft > valid_lft) |
| 2192 | return -EINVAL; |
| 2193 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2194 | dev = __dev_get_by_index(net, ifindex); |
| 2195 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2196 | return -ENODEV; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2197 | |
Brian Haley | 64e724f | 2010-07-20 10:34:30 +0000 | [diff] [blame] | 2198 | idev = addrconf_add_dev(dev); |
| 2199 | if (IS_ERR(idev)) |
| 2200 | return PTR_ERR(idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2201 | |
| 2202 | scope = ipv6_addr_scope(pfx); |
| 2203 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2204 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
| 2205 | if (addrconf_finite_timeout(timeout)) { |
| 2206 | expires = jiffies_to_clock_t(timeout * HZ); |
| 2207 | valid_lft = timeout; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2208 | flags = RTF_EXPIRES; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2209 | } else { |
| 2210 | expires = 0; |
| 2211 | flags = 0; |
| 2212 | ifa_flags |= IFA_F_PERMANENT; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2213 | } |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2214 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2215 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
| 2216 | if (addrconf_finite_timeout(timeout)) { |
| 2217 | if (timeout == 0) |
| 2218 | ifa_flags |= IFA_F_DEPRECATED; |
| 2219 | prefered_lft = timeout; |
| 2220 | } |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2221 | |
| 2222 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); |
| 2223 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2224 | if (!IS_ERR(ifp)) { |
Herbert Xu | 06aebfb | 2006-08-09 16:52:04 -0700 | [diff] [blame] | 2225 | spin_lock_bh(&ifp->lock); |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2226 | ifp->valid_lft = valid_lft; |
| 2227 | ifp->prefered_lft = prefered_lft; |
| 2228 | ifp->tstamp = jiffies; |
Herbert Xu | 06aebfb | 2006-08-09 16:52:04 -0700 | [diff] [blame] | 2229 | spin_unlock_bh(&ifp->lock); |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2230 | |
YOSHIFUJI Hideaki | 46d4804 | 2007-02-07 20:36:26 +0900 | [diff] [blame] | 2231 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2232 | expires, flags); |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2233 | /* |
| 2234 | * Note that section 3.1 of RFC 4429 indicates |
| 2235 | * that the Optimistic flag should not be set for |
| 2236 | * manually configured addresses |
| 2237 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2238 | addrconf_dad_start(ifp, 0); |
| 2239 | in6_ifa_put(ifp); |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2240 | addrconf_verify(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2241 | return 0; |
| 2242 | } |
| 2243 | |
| 2244 | return PTR_ERR(ifp); |
| 2245 | } |
| 2246 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 2247 | 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] | 2248 | unsigned int plen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2249 | { |
| 2250 | struct inet6_ifaddr *ifp; |
| 2251 | struct inet6_dev *idev; |
| 2252 | struct net_device *dev; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2253 | |
Thomas Graf | 24ef0da | 2008-05-28 16:54:22 +0200 | [diff] [blame] | 2254 | if (plen > 128) |
| 2255 | return -EINVAL; |
| 2256 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2257 | dev = __dev_get_by_index(net, ifindex); |
| 2258 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2259 | return -ENODEV; |
| 2260 | |
| 2261 | if ((idev = __in6_dev_get(dev)) == NULL) |
| 2262 | return -ENXIO; |
| 2263 | |
| 2264 | read_lock_bh(&idev->lock); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 2265 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2266 | if (ifp->prefix_len == plen && |
| 2267 | ipv6_addr_equal(pfx, &ifp->addr)) { |
| 2268 | in6_ifa_hold(ifp); |
| 2269 | read_unlock_bh(&idev->lock); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2270 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2271 | ipv6_del_addr(ifp); |
| 2272 | |
| 2273 | /* If the last address is deleted administratively, |
| 2274 | disable IPv6 on this interface. |
| 2275 | */ |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 2276 | if (list_empty(&idev->addr_list)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2277 | addrconf_ifdown(idev->dev, 1); |
| 2278 | return 0; |
| 2279 | } |
| 2280 | } |
| 2281 | read_unlock_bh(&idev->lock); |
| 2282 | return -EADDRNOTAVAIL; |
| 2283 | } |
| 2284 | |
| 2285 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2286 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2287 | { |
| 2288 | struct in6_ifreq ireq; |
| 2289 | int err; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2290 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2291 | if (!capable(CAP_NET_ADMIN)) |
| 2292 | return -EPERM; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2293 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2294 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
| 2295 | return -EFAULT; |
| 2296 | |
| 2297 | rtnl_lock(); |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2298 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
| 2299 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, |
| 2300 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2301 | rtnl_unlock(); |
| 2302 | return err; |
| 2303 | } |
| 2304 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2305 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2306 | { |
| 2307 | struct in6_ifreq ireq; |
| 2308 | int err; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2309 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2310 | if (!capable(CAP_NET_ADMIN)) |
| 2311 | return -EPERM; |
| 2312 | |
| 2313 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
| 2314 | return -EFAULT; |
| 2315 | |
| 2316 | rtnl_lock(); |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2317 | err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
| 2318 | ireq.ifr6_prefixlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2319 | rtnl_unlock(); |
| 2320 | return err; |
| 2321 | } |
| 2322 | |
Ilpo Järvinen | b5f348e | 2009-02-06 23:48:01 -0800 | [diff] [blame] | 2323 | static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
| 2324 | int plen, int scope) |
| 2325 | { |
| 2326 | struct inet6_ifaddr *ifp; |
| 2327 | |
| 2328 | ifp = ipv6_add_addr(idev, addr, plen, scope, IFA_F_PERMANENT); |
| 2329 | if (!IS_ERR(ifp)) { |
| 2330 | spin_lock_bh(&ifp->lock); |
| 2331 | ifp->flags &= ~IFA_F_TENTATIVE; |
| 2332 | spin_unlock_bh(&ifp->lock); |
| 2333 | ipv6_ifa_notify(RTM_NEWADDR, ifp); |
| 2334 | in6_ifa_put(ifp); |
| 2335 | } |
| 2336 | } |
| 2337 | |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2338 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2339 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
| 2340 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2341 | struct in6_addr addr; |
| 2342 | struct net_device *dev; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2343 | struct net *net = dev_net(idev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2344 | int scope; |
| 2345 | |
| 2346 | ASSERT_RTNL(); |
| 2347 | |
| 2348 | memset(&addr, 0, sizeof(struct in6_addr)); |
| 2349 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); |
| 2350 | |
| 2351 | if (idev->dev->flags&IFF_POINTOPOINT) { |
| 2352 | addr.s6_addr32[0] = htonl(0xfe800000); |
| 2353 | scope = IFA_LINK; |
| 2354 | } else { |
| 2355 | scope = IPV6_ADDR_COMPATv4; |
| 2356 | } |
| 2357 | |
| 2358 | if (addr.s6_addr32[3]) { |
Ilpo Järvinen | b5f348e | 2009-02-06 23:48:01 -0800 | [diff] [blame] | 2359 | add_addr(idev, &addr, 128, scope); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2360 | return; |
| 2361 | } |
| 2362 | |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 2363 | for_each_netdev(net, dev) { |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 2364 | struct in_device * in_dev = __in_dev_get_rtnl(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2365 | if (in_dev && (dev->flags & IFF_UP)) { |
| 2366 | struct in_ifaddr * ifa; |
| 2367 | |
| 2368 | int flag = scope; |
| 2369 | |
| 2370 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { |
| 2371 | int plen; |
| 2372 | |
| 2373 | addr.s6_addr32[3] = ifa->ifa_local; |
| 2374 | |
| 2375 | if (ifa->ifa_scope == RT_SCOPE_LINK) |
| 2376 | continue; |
| 2377 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { |
| 2378 | if (idev->dev->flags&IFF_POINTOPOINT) |
| 2379 | continue; |
| 2380 | flag |= IFA_HOST; |
| 2381 | } |
| 2382 | if (idev->dev->flags&IFF_POINTOPOINT) |
| 2383 | plen = 64; |
| 2384 | else |
| 2385 | plen = 96; |
| 2386 | |
Ilpo Järvinen | b5f348e | 2009-02-06 23:48:01 -0800 | [diff] [blame] | 2387 | add_addr(idev, &addr, plen, flag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2388 | } |
| 2389 | } |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2390 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2391 | } |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2392 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2393 | |
| 2394 | static void init_loopback(struct net_device *dev) |
| 2395 | { |
| 2396 | struct inet6_dev *idev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2397 | |
| 2398 | /* ::1 */ |
| 2399 | |
| 2400 | ASSERT_RTNL(); |
| 2401 | |
| 2402 | if ((idev = ipv6_find_idev(dev)) == NULL) { |
| 2403 | printk(KERN_DEBUG "init loopback: add_dev failed\n"); |
| 2404 | return; |
| 2405 | } |
| 2406 | |
Ilpo Järvinen | b5f348e | 2009-02-06 23:48:01 -0800 | [diff] [blame] | 2407 | add_addr(idev, &in6addr_loopback, 128, IFA_HOST); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2408 | } |
| 2409 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 2410 | 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] | 2411 | { |
| 2412 | struct inet6_ifaddr * ifp; |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2413 | u32 addr_flags = IFA_F_PERMANENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2414 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2415 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 2416 | if (idev->cnf.optimistic_dad && |
David Miller | 702beb8 | 2008-07-20 18:17:02 -0700 | [diff] [blame] | 2417 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2418 | addr_flags |= IFA_F_OPTIMISTIC; |
| 2419 | #endif |
| 2420 | |
| 2421 | |
| 2422 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2423 | if (!IS_ERR(ifp)) { |
YOSHIFUJI Hideaki | 46d4804 | 2007-02-07 20:36:26 +0900 | [diff] [blame] | 2424 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2425 | addrconf_dad_start(ifp, 0); |
| 2426 | in6_ifa_put(ifp); |
| 2427 | } |
| 2428 | } |
| 2429 | |
| 2430 | static void addrconf_dev_config(struct net_device *dev) |
| 2431 | { |
| 2432 | struct in6_addr addr; |
| 2433 | struct inet6_dev * idev; |
| 2434 | |
| 2435 | ASSERT_RTNL(); |
| 2436 | |
Herbert Xu | 74235a2 | 2007-06-14 13:02:55 -0700 | [diff] [blame] | 2437 | if ((dev->type != ARPHRD_ETHER) && |
| 2438 | (dev->type != ARPHRD_FDDI) && |
| 2439 | (dev->type != ARPHRD_IEEE802_TR) && |
| 2440 | (dev->type != ARPHRD_ARCNET) && |
| 2441 | (dev->type != ARPHRD_INFINIBAND)) { |
| 2442 | /* Alas, we support only Ethernet autoconfiguration. */ |
| 2443 | return; |
| 2444 | } |
| 2445 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2446 | idev = addrconf_add_dev(dev); |
Brian Haley | 64e724f | 2010-07-20 10:34:30 +0000 | [diff] [blame] | 2447 | if (IS_ERR(idev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2448 | return; |
| 2449 | |
| 2450 | memset(&addr, 0, sizeof(struct in6_addr)); |
| 2451 | addr.s6_addr32[0] = htonl(0xFE800000); |
| 2452 | |
| 2453 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) |
| 2454 | addrconf_add_linklocal(idev, &addr); |
| 2455 | } |
| 2456 | |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2457 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2458 | static void addrconf_sit_config(struct net_device *dev) |
| 2459 | { |
| 2460 | struct inet6_dev *idev; |
| 2461 | |
| 2462 | ASSERT_RTNL(); |
| 2463 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2464 | /* |
| 2465 | * Configure the tunnel with one of our IPv4 |
| 2466 | * addresses... we should configure all of |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2467 | * our v4 addrs in the tunnel |
| 2468 | */ |
| 2469 | |
| 2470 | if ((idev = ipv6_find_idev(dev)) == NULL) { |
| 2471 | printk(KERN_DEBUG "init sit: add_dev failed\n"); |
| 2472 | return; |
| 2473 | } |
| 2474 | |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 2475 | if (dev->priv_flags & IFF_ISATAP) { |
| 2476 | struct in6_addr addr; |
| 2477 | |
| 2478 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); |
| 2479 | addrconf_prefix_route(&addr, 64, dev, 0, 0); |
| 2480 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) |
| 2481 | addrconf_add_linklocal(idev, &addr); |
| 2482 | return; |
| 2483 | } |
| 2484 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2485 | sit_add_v4_addrs(idev); |
| 2486 | |
| 2487 | if (dev->flags&IFF_POINTOPOINT) { |
| 2488 | addrconf_add_mroute(dev); |
| 2489 | addrconf_add_lroute(dev); |
| 2490 | } else |
| 2491 | sit_route_add(dev); |
| 2492 | } |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2493 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2494 | |
stephen hemminger | aee80b5 | 2011-06-08 10:44:30 +0000 | [diff] [blame] | 2495 | #if defined(CONFIG_NET_IPGRE) || defined(CONFIG_NET_IPGRE_MODULE) |
| 2496 | static void addrconf_gre_config(struct net_device *dev) |
| 2497 | { |
| 2498 | struct inet6_dev *idev; |
| 2499 | struct in6_addr addr; |
| 2500 | |
| 2501 | pr_info("ipv6: addrconf_gre_config(%s)\n", dev->name); |
| 2502 | |
| 2503 | ASSERT_RTNL(); |
| 2504 | |
| 2505 | if ((idev = ipv6_find_idev(dev)) == NULL) { |
| 2506 | printk(KERN_DEBUG "init gre: add_dev failed\n"); |
| 2507 | return; |
| 2508 | } |
| 2509 | |
| 2510 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); |
| 2511 | addrconf_prefix_route(&addr, 64, dev, 0, 0); |
| 2512 | |
| 2513 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) |
| 2514 | addrconf_add_linklocal(idev, &addr); |
| 2515 | } |
| 2516 | #endif |
| 2517 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2518 | static inline int |
| 2519 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) |
| 2520 | { |
| 2521 | struct in6_addr lladdr; |
| 2522 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2523 | if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2524 | addrconf_add_linklocal(idev, &lladdr); |
| 2525 | return 0; |
| 2526 | } |
| 2527 | return -1; |
| 2528 | } |
| 2529 | |
| 2530 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) |
| 2531 | { |
| 2532 | struct net_device *link_dev; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2533 | struct net *net = dev_net(idev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2534 | |
| 2535 | /* first try to inherit the link-local address from the link device */ |
| 2536 | if (idev->dev->iflink && |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 2537 | (link_dev = __dev_get_by_index(net, idev->dev->iflink))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2538 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
| 2539 | return; |
| 2540 | } |
| 2541 | /* then try to inherit it from any device */ |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 2542 | for_each_netdev(net, link_dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2543 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
| 2544 | return; |
| 2545 | } |
| 2546 | printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); |
| 2547 | } |
| 2548 | |
| 2549 | /* |
| 2550 | * Autoconfigure tunnel with a link-local address so routing protocols, |
| 2551 | * DHCPv6, MLD etc. can be run over the virtual link |
| 2552 | */ |
| 2553 | |
| 2554 | static void addrconf_ip6_tnl_config(struct net_device *dev) |
| 2555 | { |
| 2556 | struct inet6_dev *idev; |
| 2557 | |
| 2558 | ASSERT_RTNL(); |
| 2559 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 2560 | idev = addrconf_add_dev(dev); |
Brian Haley | 64e724f | 2010-07-20 10:34:30 +0000 | [diff] [blame] | 2561 | if (IS_ERR(idev)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2562 | printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); |
| 2563 | return; |
| 2564 | } |
| 2565 | ip6_tnl_add_linklocal(idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2566 | } |
| 2567 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2568 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2569 | void * data) |
| 2570 | { |
| 2571 | struct net_device *dev = (struct net_device *) data; |
Herbert Xu | 74235a2 | 2007-06-14 13:02:55 -0700 | [diff] [blame] | 2572 | struct inet6_dev *idev = __in6_dev_get(dev); |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 2573 | int run_pending = 0; |
Herbert Xu | b217d61 | 2007-07-30 17:04:52 -0700 | [diff] [blame] | 2574 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2575 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 2576 | switch (event) { |
YOSHIFUJI Hideaki | 45ba9dd | 2007-02-15 02:07:27 +0900 | [diff] [blame] | 2577 | case NETDEV_REGISTER: |
Herbert Xu | 74235a2 | 2007-06-14 13:02:55 -0700 | [diff] [blame] | 2578 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
YOSHIFUJI Hideaki | 45ba9dd | 2007-02-15 02:07:27 +0900 | [diff] [blame] | 2579 | idev = ipv6_add_dev(dev); |
| 2580 | if (!idev) |
Herbert Xu | b217d61 | 2007-07-30 17:04:52 -0700 | [diff] [blame] | 2581 | return notifier_from_errno(-ENOMEM); |
YOSHIFUJI Hideaki | 45ba9dd | 2007-02-15 02:07:27 +0900 | [diff] [blame] | 2582 | } |
| 2583 | break; |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 2584 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2585 | case NETDEV_UP: |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2586 | case NETDEV_CHANGE: |
Jay Vosburgh | c2edacf | 2007-07-09 10:42:47 -0700 | [diff] [blame] | 2587 | if (dev->flags & IFF_SLAVE) |
| 2588 | break; |
| 2589 | |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2590 | if (event == NETDEV_UP) { |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 2591 | if (!addrconf_qdisc_ok(dev)) { |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2592 | /* device is not ready yet. */ |
| 2593 | printk(KERN_INFO |
| 2594 | "ADDRCONF(NETDEV_UP): %s: " |
| 2595 | "link is not ready\n", |
| 2596 | dev->name); |
| 2597 | break; |
| 2598 | } |
Kristian Slavov | 9908104 | 2006-02-08 16:10:53 -0800 | [diff] [blame] | 2599 | |
Evgeniy Polyakov | d31c7b8 | 2007-11-30 23:36:08 +1100 | [diff] [blame] | 2600 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
| 2601 | idev = ipv6_add_dev(dev); |
| 2602 | |
Benjamin Thery | e3ec6cf | 2008-11-05 01:43:57 -0800 | [diff] [blame] | 2603 | if (idev) { |
Kristian Slavov | 9908104 | 2006-02-08 16:10:53 -0800 | [diff] [blame] | 2604 | idev->if_flags |= IF_READY; |
Benjamin Thery | e3ec6cf | 2008-11-05 01:43:57 -0800 | [diff] [blame] | 2605 | run_pending = 1; |
| 2606 | } |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2607 | } else { |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 2608 | if (!addrconf_qdisc_ok(dev)) { |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2609 | /* device is still not ready. */ |
| 2610 | break; |
| 2611 | } |
| 2612 | |
| 2613 | if (idev) { |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 2614 | if (idev->if_flags & IF_READY) |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2615 | /* device is already configured. */ |
| 2616 | break; |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2617 | idev->if_flags |= IF_READY; |
| 2618 | } |
| 2619 | |
| 2620 | printk(KERN_INFO |
| 2621 | "ADDRCONF(NETDEV_CHANGE): %s: " |
| 2622 | "link becomes ready\n", |
| 2623 | dev->name); |
| 2624 | |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 2625 | run_pending = 1; |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2626 | } |
| 2627 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 2628 | switch (dev->type) { |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2629 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2630 | case ARPHRD_SIT: |
| 2631 | addrconf_sit_config(dev); |
| 2632 | break; |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2633 | #endif |
stephen hemminger | aee80b5 | 2011-06-08 10:44:30 +0000 | [diff] [blame] | 2634 | #if defined(CONFIG_NET_IPGRE) || defined(CONFIG_NET_IPGRE_MODULE) |
| 2635 | case ARPHRD_IPGRE: |
| 2636 | addrconf_gre_config(dev); |
| 2637 | break; |
| 2638 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2639 | case ARPHRD_TUNNEL6: |
| 2640 | addrconf_ip6_tnl_config(dev); |
| 2641 | break; |
| 2642 | case ARPHRD_LOOPBACK: |
| 2643 | init_loopback(dev); |
| 2644 | break; |
| 2645 | |
| 2646 | default: |
| 2647 | addrconf_dev_config(dev); |
| 2648 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 2649 | } |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 2650 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2651 | if (idev) { |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 2652 | if (run_pending) |
| 2653 | addrconf_dad_run(idev); |
| 2654 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 2655 | /* |
| 2656 | * If the MTU changed during the interface down, |
| 2657 | * when the interface up, the changed MTU must be |
| 2658 | * reflected in the idev as well as routers. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2659 | */ |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 2660 | if (idev->cnf.mtu6 != dev->mtu && |
| 2661 | dev->mtu >= IPV6_MIN_MTU) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2662 | rt6_mtu_change(dev, dev->mtu); |
| 2663 | idev->cnf.mtu6 = dev->mtu; |
| 2664 | } |
| 2665 | idev->tstamp = jiffies; |
| 2666 | inet6_ifinfo_notify(RTM_NEWLINK, idev); |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 2667 | |
| 2668 | /* |
| 2669 | * If the changed mtu during down is lower than |
| 2670 | * IPV6_MIN_MTU stop IPv6 on this interface. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2671 | */ |
| 2672 | if (dev->mtu < IPV6_MIN_MTU) |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 2673 | addrconf_ifdown(dev, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2674 | } |
| 2675 | break; |
| 2676 | |
| 2677 | case NETDEV_CHANGEMTU: |
Evgeniy Polyakov | d31c7b8 | 2007-11-30 23:36:08 +1100 | [diff] [blame] | 2678 | if (idev && dev->mtu >= IPV6_MIN_MTU) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2679 | rt6_mtu_change(dev, dev->mtu); |
| 2680 | idev->cnf.mtu6 = dev->mtu; |
| 2681 | break; |
| 2682 | } |
| 2683 | |
Evgeniy Polyakov | d31c7b8 | 2007-11-30 23:36:08 +1100 | [diff] [blame] | 2684 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
| 2685 | idev = ipv6_add_dev(dev); |
| 2686 | if (idev) |
| 2687 | break; |
| 2688 | } |
| 2689 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 2690 | /* |
| 2691 | * MTU falled under IPV6_MIN_MTU. |
| 2692 | * Stop IPv6 on this interface. |
| 2693 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2694 | |
| 2695 | case NETDEV_DOWN: |
| 2696 | case NETDEV_UNREGISTER: |
| 2697 | /* |
| 2698 | * Remove all addresses from this interface. |
| 2699 | */ |
| 2700 | addrconf_ifdown(dev, event != NETDEV_DOWN); |
| 2701 | break; |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2702 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2703 | case NETDEV_CHANGENAME: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2704 | if (idev) { |
Stephen Hemminger | 5632c51 | 2007-04-28 21:16:39 -0700 | [diff] [blame] | 2705 | snmp6_unregister_dev(idev); |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 2706 | addrconf_sysctl_unregister(idev); |
Pavel Emelyanov | f52295a | 2007-12-02 00:58:37 +1100 | [diff] [blame] | 2707 | addrconf_sysctl_register(idev); |
Herbert Xu | b217d61 | 2007-07-30 17:04:52 -0700 | [diff] [blame] | 2708 | err = snmp6_register_dev(idev); |
| 2709 | if (err) |
| 2710 | return notifier_from_errno(err); |
Stephen Hemminger | 5632c51 | 2007-04-28 21:16:39 -0700 | [diff] [blame] | 2711 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2712 | break; |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 2713 | |
Jiri Pirko | 93d9b7d | 2010-03-10 10:28:56 +0000 | [diff] [blame] | 2714 | case NETDEV_PRE_TYPE_CHANGE: |
| 2715 | case NETDEV_POST_TYPE_CHANGE: |
| 2716 | addrconf_type_change(dev, event); |
Moni Shoua | 75c7850 | 2009-09-15 02:37:40 -0700 | [diff] [blame] | 2717 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 2718 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2719 | |
| 2720 | return NOTIFY_OK; |
| 2721 | } |
| 2722 | |
| 2723 | /* |
| 2724 | * addrconf module should be notified of a device going up |
| 2725 | */ |
| 2726 | static struct notifier_block ipv6_dev_notf = { |
| 2727 | .notifier_call = addrconf_notify, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2728 | }; |
| 2729 | |
Jiri Pirko | 93d9b7d | 2010-03-10 10:28:56 +0000 | [diff] [blame] | 2730 | static void addrconf_type_change(struct net_device *dev, unsigned long event) |
Moni Shoua | 75c7850 | 2009-09-15 02:37:40 -0700 | [diff] [blame] | 2731 | { |
| 2732 | struct inet6_dev *idev; |
| 2733 | ASSERT_RTNL(); |
| 2734 | |
| 2735 | idev = __in6_dev_get(dev); |
| 2736 | |
Jiri Pirko | 93d9b7d | 2010-03-10 10:28:56 +0000 | [diff] [blame] | 2737 | if (event == NETDEV_POST_TYPE_CHANGE) |
Moni Shoua | 75c7850 | 2009-09-15 02:37:40 -0700 | [diff] [blame] | 2738 | ipv6_mc_remap(idev); |
Jiri Pirko | 93d9b7d | 2010-03-10 10:28:56 +0000 | [diff] [blame] | 2739 | else if (event == NETDEV_PRE_TYPE_CHANGE) |
Moni Shoua | 75c7850 | 2009-09-15 02:37:40 -0700 | [diff] [blame] | 2740 | ipv6_mc_unmap(idev); |
| 2741 | } |
| 2742 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2743 | static int addrconf_ifdown(struct net_device *dev, int how) |
| 2744 | { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2745 | struct net *net = dev_net(dev); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 2746 | struct inet6_dev *idev; |
| 2747 | struct inet6_ifaddr *ifa; |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 2748 | int state, i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2749 | |
| 2750 | ASSERT_RTNL(); |
| 2751 | |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 2752 | rt6_ifdown(net, dev); |
| 2753 | neigh_ifdown(&nd_tbl, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2754 | |
| 2755 | idev = __in6_dev_get(dev); |
| 2756 | if (idev == NULL) |
| 2757 | return -ENODEV; |
| 2758 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 2759 | /* |
| 2760 | * Step 1: remove reference to ipv6 device from parent device. |
| 2761 | * Do not dev_put! |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2762 | */ |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 2763 | if (how) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2764 | idev->dead = 1; |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 2765 | |
| 2766 | /* protected by rtnl_lock */ |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 2767 | RCU_INIT_POINTER(dev->ip6_ptr, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2768 | |
| 2769 | /* Step 1.5: remove snmp6 entry */ |
| 2770 | snmp6_unregister_dev(idev); |
| 2771 | |
| 2772 | } |
| 2773 | |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 2774 | /* Step 2: clear hash table */ |
| 2775 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
| 2776 | struct hlist_head *h = &inet6_addr_lst[i]; |
| 2777 | struct hlist_node *n; |
| 2778 | |
| 2779 | spin_lock_bh(&addrconf_hash_lock); |
| 2780 | restart: |
| 2781 | hlist_for_each_entry_rcu(ifa, n, h, addr_lst) { |
| 2782 | if (ifa->idev == idev) { |
| 2783 | hlist_del_init_rcu(&ifa->addr_lst); |
| 2784 | addrconf_del_timer(ifa); |
| 2785 | goto restart; |
| 2786 | } |
| 2787 | } |
| 2788 | spin_unlock_bh(&addrconf_hash_lock); |
| 2789 | } |
| 2790 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2791 | write_lock_bh(&idev->lock); |
| 2792 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 2793 | /* Step 2: clear flags for stateless addrconf */ |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 2794 | if (!how) |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2795 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2796 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2797 | #ifdef CONFIG_IPV6_PRIVACY |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 2798 | if (how && del_timer(&idev->regen_timer)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2799 | in6_dev_put(idev); |
| 2800 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 2801 | /* Step 3: clear tempaddr list */ |
stephen hemminger | 372e6c8 | 2010-03-17 20:31:09 +0000 | [diff] [blame] | 2802 | while (!list_empty(&idev->tempaddr_list)) { |
| 2803 | ifa = list_first_entry(&idev->tempaddr_list, |
| 2804 | struct inet6_ifaddr, tmp_list); |
| 2805 | list_del(&ifa->tmp_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2806 | write_unlock_bh(&idev->lock); |
| 2807 | spin_lock_bh(&ifa->lock); |
| 2808 | |
| 2809 | if (ifa->ifpub) { |
| 2810 | in6_ifa_put(ifa->ifpub); |
| 2811 | ifa->ifpub = NULL; |
| 2812 | } |
| 2813 | spin_unlock_bh(&ifa->lock); |
| 2814 | in6_ifa_put(ifa); |
| 2815 | write_lock_bh(&idev->lock); |
| 2816 | } |
| 2817 | #endif |
stephen hemminger | 8f37ada | 2010-03-03 08:19:59 +0000 | [diff] [blame] | 2818 | |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 2819 | while (!list_empty(&idev->addr_list)) { |
| 2820 | ifa = list_first_entry(&idev->addr_list, |
| 2821 | struct inet6_ifaddr, if_list); |
stephen hemminger | 84e8b80 | 2010-03-02 13:32:46 +0000 | [diff] [blame] | 2822 | addrconf_del_timer(ifa); |
| 2823 | |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 2824 | list_del(&ifa->if_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2825 | |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 2826 | write_unlock_bh(&idev->lock); |
stephen hemminger | 84e8b80 | 2010-03-02 13:32:46 +0000 | [diff] [blame] | 2827 | |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 2828 | spin_lock_bh(&ifa->state_lock); |
| 2829 | state = ifa->state; |
| 2830 | ifa->state = INET6_IFADDR_STATE_DEAD; |
| 2831 | spin_unlock_bh(&ifa->state_lock); |
stephen hemminger | 84e8b80 | 2010-03-02 13:32:46 +0000 | [diff] [blame] | 2832 | |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 2833 | if (state != INET6_IFADDR_STATE_DEAD) { |
| 2834 | __ipv6_ifa_notify(RTM_DELADDR, ifa); |
| 2835 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa); |
stephen hemminger | 27bdb2a | 2010-04-12 05:41:32 +0000 | [diff] [blame] | 2836 | } |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 2837 | in6_ifa_put(ifa); |
stephen hemminger | 8f37ada | 2010-03-03 08:19:59 +0000 | [diff] [blame] | 2838 | |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 2839 | write_lock_bh(&idev->lock); |
| 2840 | } |
stephen hemminger | 8f37ada | 2010-03-03 08:19:59 +0000 | [diff] [blame] | 2841 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2842 | write_unlock_bh(&idev->lock); |
| 2843 | |
| 2844 | /* Step 5: Discard multicast list */ |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 2845 | if (how) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2846 | ipv6_mc_destroy_dev(idev); |
| 2847 | else |
| 2848 | ipv6_mc_down(idev); |
| 2849 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2850 | idev->tstamp = jiffies; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2851 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 2852 | /* Last: Shot the device (if unregistered) */ |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 2853 | if (how) { |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 2854 | addrconf_sysctl_unregister(idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2855 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
| 2856 | neigh_ifdown(&nd_tbl, dev); |
| 2857 | in6_dev_put(idev); |
| 2858 | } |
| 2859 | return 0; |
| 2860 | } |
| 2861 | |
| 2862 | static void addrconf_rs_timer(unsigned long data) |
| 2863 | { |
| 2864 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; |
stephen hemminger | 5b2a195 | 2010-03-02 13:32:45 +0000 | [diff] [blame] | 2865 | struct inet6_dev *idev = ifp->idev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2866 | |
stephen hemminger | 5b2a195 | 2010-03-02 13:32:45 +0000 | [diff] [blame] | 2867 | read_lock(&idev->lock); |
| 2868 | if (idev->dead || !(idev->if_flags & IF_READY)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2869 | goto out; |
| 2870 | |
stephen hemminger | 5b2a195 | 2010-03-02 13:32:45 +0000 | [diff] [blame] | 2871 | if (idev->cnf.forwarding) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2872 | goto out; |
stephen hemminger | 5b2a195 | 2010-03-02 13:32:45 +0000 | [diff] [blame] | 2873 | |
| 2874 | /* Announcement received after solicitation was sent */ |
| 2875 | if (idev->if_flags & IF_RA_RCVD) |
| 2876 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2877 | |
| 2878 | spin_lock(&ifp->lock); |
stephen hemminger | 5b2a195 | 2010-03-02 13:32:45 +0000 | [diff] [blame] | 2879 | if (ifp->probes++ < idev->cnf.rtr_solicits) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2880 | /* The wait after the last probe can be shorter */ |
| 2881 | addrconf_mod_timer(ifp, AC_RS, |
stephen hemminger | 5b2a195 | 2010-03-02 13:32:45 +0000 | [diff] [blame] | 2882 | (ifp->probes == idev->cnf.rtr_solicits) ? |
| 2883 | idev->cnf.rtr_solicit_delay : |
| 2884 | idev->cnf.rtr_solicit_interval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2885 | spin_unlock(&ifp->lock); |
| 2886 | |
stephen hemminger | 5b2a195 | 2010-03-02 13:32:45 +0000 | [diff] [blame] | 2887 | ndisc_send_rs(idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2888 | } else { |
| 2889 | spin_unlock(&ifp->lock); |
| 2890 | /* |
| 2891 | * Note: we do not support deprecated "all on-link" |
| 2892 | * assumption any longer. |
| 2893 | */ |
| 2894 | printk(KERN_DEBUG "%s: no IPv6 routers present\n", |
stephen hemminger | 5b2a195 | 2010-03-02 13:32:45 +0000 | [diff] [blame] | 2895 | idev->dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2896 | } |
| 2897 | |
| 2898 | out: |
stephen hemminger | 5b2a195 | 2010-03-02 13:32:45 +0000 | [diff] [blame] | 2899 | read_unlock(&idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2900 | in6_ifa_put(ifp); |
| 2901 | } |
| 2902 | |
| 2903 | /* |
| 2904 | * Duplicate Address Detection |
| 2905 | */ |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2906 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
| 2907 | { |
| 2908 | unsigned long rand_num; |
| 2909 | struct inet6_dev *idev = ifp->idev; |
| 2910 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2911 | if (ifp->flags & IFA_F_OPTIMISTIC) |
| 2912 | rand_num = 0; |
| 2913 | else |
| 2914 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); |
| 2915 | |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2916 | ifp->probes = idev->cnf.dad_transmits; |
| 2917 | addrconf_mod_timer(ifp, AC_DAD, rand_num); |
| 2918 | } |
| 2919 | |
Jamal Hadi Salim | e431b8c | 2005-06-18 22:55:31 -0700 | [diff] [blame] | 2920 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2921 | { |
| 2922 | struct inet6_dev *idev = ifp->idev; |
| 2923 | struct net_device *dev = idev->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2924 | |
| 2925 | addrconf_join_solict(dev, &ifp->addr); |
| 2926 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2927 | net_srandom(ifp->addr.s6_addr32[3]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2928 | |
| 2929 | read_lock_bh(&idev->lock); |
Herbert Xu | 622ccdf | 2010-05-18 15:56:06 -0700 | [diff] [blame] | 2930 | spin_lock(&ifp->lock); |
Herbert Xu | e9d3e08 | 2010-05-18 15:36:06 -0700 | [diff] [blame] | 2931 | if (ifp->state == INET6_IFADDR_STATE_DEAD) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2932 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2933 | |
| 2934 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 2935 | idev->cnf.accept_dad < 1 || |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 2936 | !(ifp->flags&IFA_F_TENTATIVE) || |
| 2937 | ifp->flags & IFA_F_NODAD) { |
Brian Haley | cc411d0 | 2009-09-09 14:41:32 +0000 | [diff] [blame] | 2938 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 2939 | spin_unlock(&ifp->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2940 | read_unlock_bh(&idev->lock); |
| 2941 | |
| 2942 | addrconf_dad_completed(ifp); |
| 2943 | return; |
| 2944 | } |
| 2945 | |
YOSHIFUJI Hideaki | 6732bad | 2005-12-27 13:35:15 -0800 | [diff] [blame] | 2946 | if (!(idev->if_flags & IF_READY)) { |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 2947 | spin_unlock(&ifp->lock); |
YOSHIFUJI Hideaki | 6732bad | 2005-12-27 13:35:15 -0800 | [diff] [blame] | 2948 | read_unlock_bh(&idev->lock); |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2949 | /* |
Masatake YAMATO | 590a988 | 2009-06-09 10:41:12 +0900 | [diff] [blame] | 2950 | * If the device is not ready: |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2951 | * - keep it tentative if it is a permanent address. |
| 2952 | * - otherwise, kill it. |
| 2953 | */ |
| 2954 | in6_ifa_hold(ifp); |
Brian Haley | cc411d0 | 2009-09-09 14:41:32 +0000 | [diff] [blame] | 2955 | addrconf_dad_stop(ifp, 0); |
YOSHIFUJI Hideaki | 6732bad | 2005-12-27 13:35:15 -0800 | [diff] [blame] | 2956 | return; |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2957 | } |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2958 | |
| 2959 | /* |
| 2960 | * Optimistic nodes can start receiving |
| 2961 | * Frames right away |
| 2962 | */ |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 2963 | if (ifp->flags & IFA_F_OPTIMISTIC) |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2964 | ip6_ins_rt(ifp->rt); |
| 2965 | |
YOSHIFUJI Hideaki | 6732bad | 2005-12-27 13:35:15 -0800 | [diff] [blame] | 2966 | addrconf_dad_kick(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2967 | out: |
Herbert Xu | 622ccdf | 2010-05-18 15:56:06 -0700 | [diff] [blame] | 2968 | spin_unlock(&ifp->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2969 | read_unlock_bh(&idev->lock); |
| 2970 | } |
| 2971 | |
| 2972 | static void addrconf_dad_timer(unsigned long data) |
| 2973 | { |
| 2974 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; |
| 2975 | struct inet6_dev *idev = ifp->idev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2976 | struct in6_addr mcaddr; |
| 2977 | |
Herbert Xu | f2344a1 | 2010-05-18 15:55:27 -0700 | [diff] [blame] | 2978 | if (!ifp->probes && addrconf_dad_end(ifp)) |
| 2979 | goto out; |
| 2980 | |
stephen hemminger | 122e451 | 2010-03-02 13:32:44 +0000 | [diff] [blame] | 2981 | read_lock(&idev->lock); |
| 2982 | if (idev->dead || !(idev->if_flags & IF_READY)) { |
| 2983 | read_unlock(&idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2984 | goto out; |
| 2985 | } |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 2986 | |
| 2987 | spin_lock(&ifp->lock); |
Herbert Xu | 622ccdf | 2010-05-18 15:56:06 -0700 | [diff] [blame] | 2988 | if (ifp->state == INET6_IFADDR_STATE_DEAD) { |
| 2989 | spin_unlock(&ifp->lock); |
| 2990 | read_unlock(&idev->lock); |
| 2991 | goto out; |
| 2992 | } |
| 2993 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2994 | if (ifp->probes == 0) { |
| 2995 | /* |
| 2996 | * DAD was successful |
| 2997 | */ |
| 2998 | |
Brian Haley | cc411d0 | 2009-09-09 14:41:32 +0000 | [diff] [blame] | 2999 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 3000 | spin_unlock(&ifp->lock); |
stephen hemminger | 122e451 | 2010-03-02 13:32:44 +0000 | [diff] [blame] | 3001 | read_unlock(&idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3002 | |
| 3003 | addrconf_dad_completed(ifp); |
| 3004 | |
| 3005 | goto out; |
| 3006 | } |
| 3007 | |
| 3008 | ifp->probes--; |
| 3009 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 3010 | spin_unlock(&ifp->lock); |
stephen hemminger | 122e451 | 2010-03-02 13:32:44 +0000 | [diff] [blame] | 3011 | read_unlock(&idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3012 | |
| 3013 | /* send a neighbour solicitation for our addr */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3014 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
YOSHIFUJI Hideaki | d7aabf2 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 3015 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3016 | out: |
| 3017 | in6_ifa_put(ifp); |
| 3018 | } |
| 3019 | |
| 3020 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) |
| 3021 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 3022 | struct net_device *dev = ifp->idev->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3023 | |
| 3024 | /* |
| 3025 | * Configure the address for reception. Now it is valid. |
| 3026 | */ |
| 3027 | |
| 3028 | ipv6_ifa_notify(RTM_NEWADDR, ifp); |
| 3029 | |
Tore Anderson | 026359b | 2011-08-28 23:47:33 +0000 | [diff] [blame] | 3030 | /* If added prefix is link local and we are prepared to process |
| 3031 | router advertisements, start sending router solicitations. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3032 | */ |
| 3033 | |
Tore Anderson | 026359b | 2011-08-28 23:47:33 +0000 | [diff] [blame] | 3034 | if (((ifp->idev->cnf.accept_ra == 1 && !ifp->idev->cnf.forwarding) || |
| 3035 | ifp->idev->cnf.accept_ra == 2) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3036 | ifp->idev->cnf.rtr_solicits > 0 && |
| 3037 | (dev->flags&IFF_LOOPBACK) == 0 && |
| 3038 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3039 | /* |
| 3040 | * If a host as already performed a random delay |
| 3041 | * [...] as part of DAD [...] there is no need |
| 3042 | * to delay again before sending the first RS |
| 3043 | */ |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 3044 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3045 | |
| 3046 | spin_lock_bh(&ifp->lock); |
| 3047 | ifp->probes = 1; |
| 3048 | ifp->idev->if_flags |= IF_RS_SENT; |
| 3049 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); |
| 3050 | spin_unlock_bh(&ifp->lock); |
| 3051 | } |
| 3052 | } |
| 3053 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 3054 | static void addrconf_dad_run(struct inet6_dev *idev) |
| 3055 | { |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 3056 | struct inet6_ifaddr *ifp; |
| 3057 | |
| 3058 | read_lock_bh(&idev->lock); |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 3059 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 3060 | spin_lock(&ifp->lock); |
Herbert Xu | f2344a1 | 2010-05-18 15:55:27 -0700 | [diff] [blame] | 3061 | if (ifp->flags & IFA_F_TENTATIVE && |
| 3062 | ifp->state == INET6_IFADDR_STATE_DAD) |
| 3063 | addrconf_dad_kick(ifp); |
stephen hemminger | 21809fa | 2010-02-08 19:48:52 +0000 | [diff] [blame] | 3064 | spin_unlock(&ifp->lock); |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 3065 | } |
| 3066 | read_unlock_bh(&idev->lock); |
| 3067 | } |
| 3068 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3069 | #ifdef CONFIG_PROC_FS |
| 3070 | struct if6_iter_state { |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 3071 | struct seq_net_private p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3072 | int bucket; |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3073 | int offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3074 | }; |
| 3075 | |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3076 | 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] | 3077 | { |
| 3078 | struct inet6_ifaddr *ifa = NULL; |
| 3079 | struct if6_iter_state *state = seq->private; |
YOSHIFUJI Hideaki | 1218854 | 2008-03-26 02:36:06 +0900 | [diff] [blame] | 3080 | struct net *net = seq_file_net(seq); |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3081 | int p = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3082 | |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3083 | /* initial bucket if pos is 0 */ |
| 3084 | if (pos == 0) { |
| 3085 | state->bucket = 0; |
| 3086 | state->offset = 0; |
| 3087 | } |
| 3088 | |
| 3089 | for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 3090 | struct hlist_node *n; |
Eric Dumazet | 4f70ecc | 2010-05-03 10:50:14 +0000 | [diff] [blame] | 3091 | hlist_for_each_entry_rcu_bh(ifa, n, &inet6_addr_lst[state->bucket], |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3092 | addr_lst) { |
| 3093 | /* sync with offset */ |
| 3094 | if (p < state->offset) { |
| 3095 | p++; |
| 3096 | continue; |
| 3097 | } |
| 3098 | state->offset++; |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 3099 | if (net_eq(dev_net(ifa->idev->dev), net)) |
| 3100 | return ifa; |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3101 | } |
| 3102 | |
| 3103 | /* prepare for next bucket */ |
| 3104 | state->offset = 0; |
| 3105 | p = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3106 | } |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 3107 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3108 | } |
| 3109 | |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 3110 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, |
| 3111 | struct inet6_ifaddr *ifa) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3112 | { |
| 3113 | struct if6_iter_state *state = seq->private; |
YOSHIFUJI Hideaki | 1218854 | 2008-03-26 02:36:06 +0900 | [diff] [blame] | 3114 | struct net *net = seq_file_net(seq); |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 3115 | struct hlist_node *n = &ifa->addr_lst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3116 | |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3117 | hlist_for_each_entry_continue_rcu_bh(ifa, n, addr_lst) { |
| 3118 | state->offset++; |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 3119 | if (net_eq(dev_net(ifa->idev->dev), net)) |
| 3120 | return ifa; |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3121 | } |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 3122 | |
| 3123 | while (++state->bucket < IN6_ADDR_HSIZE) { |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3124 | state->offset = 0; |
Eric Dumazet | 4f70ecc | 2010-05-03 10:50:14 +0000 | [diff] [blame] | 3125 | hlist_for_each_entry_rcu_bh(ifa, n, |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 3126 | &inet6_addr_lst[state->bucket], addr_lst) { |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3127 | state->offset++; |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 3128 | if (net_eq(dev_net(ifa->idev->dev), net)) |
| 3129 | return ifa; |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 3130 | } |
| 3131 | } |
| 3132 | |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 3133 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3134 | } |
| 3135 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3136 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) |
Eric Dumazet | 4f70ecc | 2010-05-03 10:50:14 +0000 | [diff] [blame] | 3137 | __acquires(rcu_bh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3138 | { |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 3139 | rcu_read_lock_bh(); |
Mihai Maruseac | 1d57830 | 2012-01-03 23:31:35 +0000 | [diff] [blame] | 3140 | return if6_get_first(seq, *pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3141 | } |
| 3142 | |
| 3143 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 3144 | { |
| 3145 | struct inet6_ifaddr *ifa; |
| 3146 | |
| 3147 | ifa = if6_get_next(seq, v); |
| 3148 | ++*pos; |
| 3149 | return ifa; |
| 3150 | } |
| 3151 | |
| 3152 | static void if6_seq_stop(struct seq_file *seq, void *v) |
Eric Dumazet | 4f70ecc | 2010-05-03 10:50:14 +0000 | [diff] [blame] | 3153 | __releases(rcu_bh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3154 | { |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 3155 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3156 | } |
| 3157 | |
| 3158 | static int if6_seq_show(struct seq_file *seq, void *v) |
| 3159 | { |
| 3160 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; |
Harvey Harrison | 4b7a427 | 2008-10-29 12:50:24 -0700 | [diff] [blame] | 3161 | seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", |
Harvey Harrison | b071195 | 2008-10-28 16:05:40 -0700 | [diff] [blame] | 3162 | &ifp->addr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3163 | ifp->idev->dev->ifindex, |
| 3164 | ifp->prefix_len, |
| 3165 | ifp->scope, |
| 3166 | ifp->flags, |
| 3167 | ifp->idev->dev->name); |
| 3168 | return 0; |
| 3169 | } |
| 3170 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 3171 | static const struct seq_operations if6_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3172 | .start = if6_seq_start, |
| 3173 | .next = if6_seq_next, |
| 3174 | .show = if6_seq_show, |
| 3175 | .stop = if6_seq_stop, |
| 3176 | }; |
| 3177 | |
| 3178 | static int if6_seq_open(struct inode *inode, struct file *file) |
| 3179 | { |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 3180 | return seq_open_net(inode, file, &if6_seq_ops, |
| 3181 | sizeof(struct if6_iter_state)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3182 | } |
| 3183 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 3184 | static const struct file_operations if6_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3185 | .owner = THIS_MODULE, |
| 3186 | .open = if6_seq_open, |
| 3187 | .read = seq_read, |
| 3188 | .llseek = seq_lseek, |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 3189 | .release = seq_release_net, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3190 | }; |
| 3191 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 3192 | static int __net_init if6_proc_net_init(struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3193 | { |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 3194 | if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3195 | return -ENOMEM; |
| 3196 | return 0; |
| 3197 | } |
| 3198 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 3199 | static void __net_exit if6_proc_net_exit(struct net *net) |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 3200 | { |
| 3201 | proc_net_remove(net, "if_inet6"); |
| 3202 | } |
| 3203 | |
| 3204 | static struct pernet_operations if6_proc_net_ops = { |
| 3205 | .init = if6_proc_net_init, |
| 3206 | .exit = if6_proc_net_exit, |
| 3207 | }; |
| 3208 | |
| 3209 | int __init if6_proc_init(void) |
| 3210 | { |
| 3211 | return register_pernet_subsys(&if6_proc_net_ops); |
| 3212 | } |
| 3213 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3214 | void if6_proc_exit(void) |
| 3215 | { |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 3216 | unregister_pernet_subsys(&if6_proc_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3217 | } |
| 3218 | #endif /* CONFIG_PROC_FS */ |
| 3219 | |
Masahide NAKAMURA | 59fbb3a6 | 2007-06-26 23:56:32 -0700 | [diff] [blame] | 3220 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 3221 | /* Check if address is a home address configured on any interface. */ |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 3222 | 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] | 3223 | { |
| 3224 | int ret = 0; |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 3225 | struct inet6_ifaddr *ifp = NULL; |
| 3226 | struct hlist_node *n; |
stephen hemminger | 3a88a81 | 2010-03-17 20:31:12 +0000 | [diff] [blame] | 3227 | unsigned int hash = ipv6_addr_hash(addr); |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 3228 | |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 3229 | rcu_read_lock_bh(); |
Eric Dumazet | 4f70ecc | 2010-05-03 10:50:14 +0000 | [diff] [blame] | 3230 | hlist_for_each_entry_rcu_bh(ifp, n, &inet6_addr_lst[hash], addr_lst) { |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 3231 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
Daniel Lezcano | 389f661 | 2008-01-10 22:44:40 -0800 | [diff] [blame] | 3232 | continue; |
YOSHIFUJI Hideaki | caad295 | 2008-04-10 15:42:07 +0900 | [diff] [blame] | 3233 | if (ipv6_addr_equal(&ifp->addr, addr) && |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 3234 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
| 3235 | ret = 1; |
| 3236 | break; |
| 3237 | } |
| 3238 | } |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 3239 | rcu_read_unlock_bh(); |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 3240 | return ret; |
| 3241 | } |
| 3242 | #endif |
| 3243 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3244 | /* |
| 3245 | * Periodic address status verification |
| 3246 | */ |
| 3247 | |
| 3248 | static void addrconf_verify(unsigned long foo) |
| 3249 | { |
YOSHIFUJI Hideaki | b2db756 | 2010-03-20 16:11:12 -0700 | [diff] [blame] | 3250 | unsigned long now, next, next_sec, next_sched; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3251 | struct inet6_ifaddr *ifp; |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 3252 | struct hlist_node *node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3253 | int i; |
| 3254 | |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 3255 | rcu_read_lock_bh(); |
| 3256 | spin_lock(&addrconf_verify_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3257 | now = jiffies; |
YOSHIFUJI Hideaki | b2db756 | 2010-03-20 16:11:12 -0700 | [diff] [blame] | 3258 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3259 | |
| 3260 | del_timer(&addr_chk_timer); |
| 3261 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 3262 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3263 | restart: |
Eric Dumazet | 4f70ecc | 2010-05-03 10:50:14 +0000 | [diff] [blame] | 3264 | hlist_for_each_entry_rcu_bh(ifp, node, |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 3265 | &inet6_addr_lst[i], addr_lst) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3266 | unsigned long age; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3267 | |
| 3268 | if (ifp->flags & IFA_F_PERMANENT) |
| 3269 | continue; |
| 3270 | |
| 3271 | spin_lock(&ifp->lock); |
YOSHIFUJI Hideaki | b2db756 | 2010-03-20 16:11:12 -0700 | [diff] [blame] | 3272 | /* We try to batch several events at once. */ |
| 3273 | age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3274 | |
YOSHIFUJI Hideaki | 8f27ebb | 2006-07-28 18:12:11 +0900 | [diff] [blame] | 3275 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
| 3276 | age >= ifp->valid_lft) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3277 | spin_unlock(&ifp->lock); |
| 3278 | in6_ifa_hold(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3279 | ipv6_del_addr(ifp); |
| 3280 | goto restart; |
YOSHIFUJI Hideaki | 8f27ebb | 2006-07-28 18:12:11 +0900 | [diff] [blame] | 3281 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
| 3282 | spin_unlock(&ifp->lock); |
| 3283 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3284 | } else if (age >= ifp->prefered_lft) { |
Brian Haley | a1ed052 | 2009-07-02 07:10:52 +0000 | [diff] [blame] | 3285 | /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3286 | int deprecate = 0; |
| 3287 | |
| 3288 | if (!(ifp->flags&IFA_F_DEPRECATED)) { |
| 3289 | deprecate = 1; |
| 3290 | ifp->flags |= IFA_F_DEPRECATED; |
| 3291 | } |
| 3292 | |
| 3293 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) |
| 3294 | next = ifp->tstamp + ifp->valid_lft * HZ; |
| 3295 | |
| 3296 | spin_unlock(&ifp->lock); |
| 3297 | |
| 3298 | if (deprecate) { |
| 3299 | in6_ifa_hold(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3300 | |
| 3301 | ipv6_ifa_notify(0, ifp); |
| 3302 | in6_ifa_put(ifp); |
| 3303 | goto restart; |
| 3304 | } |
| 3305 | #ifdef CONFIG_IPV6_PRIVACY |
| 3306 | } else if ((ifp->flags&IFA_F_TEMPORARY) && |
| 3307 | !(ifp->flags&IFA_F_TENTATIVE)) { |
stephen hemminger | 88949cf | 2010-03-17 20:31:17 +0000 | [diff] [blame] | 3308 | unsigned long regen_advance = ifp->idev->cnf.regen_max_retry * |
| 3309 | ifp->idev->cnf.dad_transmits * |
| 3310 | ifp->idev->nd_parms->retrans_time / HZ; |
| 3311 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3312 | if (age >= ifp->prefered_lft - regen_advance) { |
| 3313 | struct inet6_ifaddr *ifpub = ifp->ifpub; |
| 3314 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) |
| 3315 | next = ifp->tstamp + ifp->prefered_lft * HZ; |
| 3316 | if (!ifp->regen_count && ifpub) { |
| 3317 | ifp->regen_count++; |
| 3318 | in6_ifa_hold(ifp); |
| 3319 | in6_ifa_hold(ifpub); |
| 3320 | spin_unlock(&ifp->lock); |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 3321 | |
Hiroyuki YAMAMORI | 291d809 | 2005-12-23 11:24:05 -0800 | [diff] [blame] | 3322 | spin_lock(&ifpub->lock); |
| 3323 | ifpub->regen_count = 0; |
| 3324 | spin_unlock(&ifpub->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3325 | ipv6_create_tempaddr(ifpub, ifp); |
| 3326 | in6_ifa_put(ifpub); |
| 3327 | in6_ifa_put(ifp); |
| 3328 | goto restart; |
| 3329 | } |
| 3330 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) |
| 3331 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; |
| 3332 | spin_unlock(&ifp->lock); |
| 3333 | #endif |
| 3334 | } else { |
| 3335 | /* ifp->prefered_lft <= ifp->valid_lft */ |
| 3336 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) |
| 3337 | next = ifp->tstamp + ifp->prefered_lft * HZ; |
| 3338 | spin_unlock(&ifp->lock); |
| 3339 | } |
| 3340 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3341 | } |
| 3342 | |
YOSHIFUJI Hideaki | b2db756 | 2010-03-20 16:11:12 -0700 | [diff] [blame] | 3343 | next_sec = round_jiffies_up(next); |
| 3344 | next_sched = next; |
| 3345 | |
| 3346 | /* If rounded timeout is accurate enough, accept it. */ |
| 3347 | if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) |
| 3348 | next_sched = next_sec; |
| 3349 | |
| 3350 | /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ |
| 3351 | if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX)) |
| 3352 | next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX; |
| 3353 | |
| 3354 | ADBG((KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n", |
| 3355 | now, next, next_sec, next_sched)); |
| 3356 | |
| 3357 | addr_chk_timer.expires = next_sched; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3358 | add_timer(&addr_chk_timer); |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 3359 | spin_unlock(&addrconf_verify_lock); |
| 3360 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3361 | } |
| 3362 | |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3363 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) |
| 3364 | { |
| 3365 | struct in6_addr *pfx = NULL; |
| 3366 | |
| 3367 | if (addr) |
| 3368 | pfx = nla_data(addr); |
| 3369 | |
| 3370 | if (local) { |
| 3371 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) |
| 3372 | pfx = NULL; |
| 3373 | else |
| 3374 | pfx = nla_data(local); |
| 3375 | } |
| 3376 | |
| 3377 | return pfx; |
| 3378 | } |
| 3379 | |
Patrick McHardy | ef7c79e | 2007-06-05 12:38:30 -0700 | [diff] [blame] | 3380 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3381 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
| 3382 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, |
| 3383 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, |
| 3384 | }; |
| 3385 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3386 | static int |
| 3387 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
| 3388 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 3389 | struct net *net = sock_net(skb->sk); |
Thomas Graf | b933f71 | 2006-09-18 00:10:19 -0700 | [diff] [blame] | 3390 | struct ifaddrmsg *ifm; |
| 3391 | struct nlattr *tb[IFA_MAX+1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3392 | struct in6_addr *pfx; |
Thomas Graf | b933f71 | 2006-09-18 00:10:19 -0700 | [diff] [blame] | 3393 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3394 | |
Thomas Graf | b933f71 | 2006-09-18 00:10:19 -0700 | [diff] [blame] | 3395 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
| 3396 | if (err < 0) |
| 3397 | return err; |
| 3398 | |
| 3399 | ifm = nlmsg_data(nlh); |
| 3400 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3401 | if (pfx == NULL) |
| 3402 | return -EINVAL; |
| 3403 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 3404 | return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3405 | } |
| 3406 | |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 3407 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
| 3408 | u32 prefered_lft, u32 valid_lft) |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3409 | { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 3410 | u32 flags; |
| 3411 | clock_t expires; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 3412 | unsigned long timeout; |
YOSHIFUJI Hideaki | 46d4804 | 2007-02-07 20:36:26 +0900 | [diff] [blame] | 3413 | |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3414 | if (!valid_lft || (prefered_lft > valid_lft)) |
| 3415 | return -EINVAL; |
| 3416 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 3417 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
| 3418 | if (addrconf_finite_timeout(timeout)) { |
| 3419 | expires = jiffies_to_clock_t(timeout * HZ); |
| 3420 | valid_lft = timeout; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 3421 | flags = RTF_EXPIRES; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 3422 | } else { |
| 3423 | expires = 0; |
| 3424 | flags = 0; |
| 3425 | ifa_flags |= IFA_F_PERMANENT; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 3426 | } |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3427 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 3428 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
| 3429 | if (addrconf_finite_timeout(timeout)) { |
| 3430 | if (timeout == 0) |
| 3431 | ifa_flags |= IFA_F_DEPRECATED; |
| 3432 | prefered_lft = timeout; |
| 3433 | } |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3434 | |
| 3435 | spin_lock_bh(&ifp->lock); |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 3436 | 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] | 3437 | ifp->tstamp = jiffies; |
| 3438 | ifp->valid_lft = valid_lft; |
| 3439 | ifp->prefered_lft = prefered_lft; |
| 3440 | |
| 3441 | spin_unlock_bh(&ifp->lock); |
| 3442 | if (!(ifp->flags&IFA_F_TENTATIVE)) |
| 3443 | ipv6_ifa_notify(0, ifp); |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3444 | |
YOSHIFUJI Hideaki | 46d4804 | 2007-02-07 20:36:26 +0900 | [diff] [blame] | 3445 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 3446 | expires, flags); |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3447 | addrconf_verify(0); |
| 3448 | |
| 3449 | return 0; |
| 3450 | } |
| 3451 | |
| 3452 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3453 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
| 3454 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 3455 | struct net *net = sock_net(skb->sk); |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3456 | struct ifaddrmsg *ifm; |
| 3457 | struct nlattr *tb[IFA_MAX+1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3458 | struct in6_addr *pfx; |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 3459 | struct inet6_ifaddr *ifa; |
| 3460 | struct net_device *dev; |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 3461 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
| 3462 | u8 ifa_flags; |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3463 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3464 | |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3465 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
| 3466 | if (err < 0) |
| 3467 | return err; |
| 3468 | |
| 3469 | ifm = nlmsg_data(nlh); |
| 3470 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3471 | if (pfx == NULL) |
| 3472 | return -EINVAL; |
| 3473 | |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3474 | if (tb[IFA_CACHEINFO]) { |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 3475 | struct ifa_cacheinfo *ci; |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3476 | |
| 3477 | ci = nla_data(tb[IFA_CACHEINFO]); |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 3478 | valid_lft = ci->ifa_valid; |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3479 | preferred_lft = ci->ifa_prefered; |
| 3480 | } else { |
| 3481 | preferred_lft = INFINITY_LIFE_TIME; |
| 3482 | valid_lft = INFINITY_LIFE_TIME; |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 3483 | } |
| 3484 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 3485 | dev = __dev_get_by_index(net, ifm->ifa_index); |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 3486 | if (dev == NULL) |
| 3487 | return -ENODEV; |
| 3488 | |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 3489 | /* We ignore other flags so far. */ |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 3490 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 3491 | |
Daniel Lezcano | 1cab3da | 2008-01-10 22:44:09 -0800 | [diff] [blame] | 3492 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 3493 | if (ifa == NULL) { |
| 3494 | /* |
| 3495 | * It would be best to check for !NLM_F_CREATE here but |
| 3496 | * userspace alreay relies on not having to provide this. |
| 3497 | */ |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 3498 | return inet6_addr_add(net, ifm->ifa_index, pfx, |
| 3499 | ifm->ifa_prefixlen, ifa_flags, |
| 3500 | preferred_lft, valid_lft); |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3501 | } |
| 3502 | |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 3503 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
| 3504 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) |
| 3505 | err = -EEXIST; |
| 3506 | else |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 3507 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 3508 | |
| 3509 | in6_ifa_put(ifa); |
| 3510 | |
| 3511 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3512 | } |
| 3513 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3514 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
| 3515 | u8 scope, int ifindex) |
| 3516 | { |
| 3517 | struct ifaddrmsg *ifm; |
| 3518 | |
| 3519 | ifm = nlmsg_data(nlh); |
| 3520 | ifm->ifa_family = AF_INET6; |
| 3521 | ifm->ifa_prefixlen = prefixlen; |
| 3522 | ifm->ifa_flags = flags; |
| 3523 | ifm->ifa_scope = scope; |
| 3524 | ifm->ifa_index = ifindex; |
| 3525 | } |
| 3526 | |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3527 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
| 3528 | unsigned long tstamp, u32 preferred, u32 valid) |
| 3529 | { |
| 3530 | struct ifa_cacheinfo ci; |
| 3531 | |
Thomas Graf | 18a31e1 | 2010-11-17 04:12:02 +0000 | [diff] [blame] | 3532 | ci.cstamp = cstamp_delta(cstamp); |
| 3533 | ci.tstamp = cstamp_delta(tstamp); |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3534 | ci.ifa_prefered = preferred; |
| 3535 | ci.ifa_valid = valid; |
| 3536 | |
| 3537 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); |
| 3538 | } |
| 3539 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3540 | static inline int rt_scope(int ifa_scope) |
| 3541 | { |
| 3542 | if (ifa_scope & IFA_HOST) |
| 3543 | return RT_SCOPE_HOST; |
| 3544 | else if (ifa_scope & IFA_LINK) |
| 3545 | return RT_SCOPE_LINK; |
| 3546 | else if (ifa_scope & IFA_SITE) |
| 3547 | return RT_SCOPE_SITE; |
| 3548 | else |
| 3549 | return RT_SCOPE_UNIVERSE; |
| 3550 | } |
| 3551 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3552 | static inline int inet6_ifaddr_msgsize(void) |
| 3553 | { |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 3554 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
| 3555 | + nla_total_size(16) /* IFA_ADDRESS */ |
| 3556 | + nla_total_size(sizeof(struct ifa_cacheinfo)); |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3557 | } |
YOSHIFUJI Hideaki | c5396a3 | 2006-06-17 22:48:48 -0700 | [diff] [blame] | 3558 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3559 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
Jamal Hadi Salim | b6544c0 | 2005-06-18 22:54:12 -0700 | [diff] [blame] | 3560 | u32 pid, u32 seq, int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3561 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3562 | struct nlmsghdr *nlh; |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3563 | u32 preferred, valid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3564 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3565 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
| 3566 | if (nlh == NULL) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3567 | return -EMSGSIZE; |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3568 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3569 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
| 3570 | ifa->idev->dev->ifindex); |
| 3571 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3572 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3573 | preferred = ifa->prefered_lft; |
| 3574 | valid = ifa->valid_lft; |
| 3575 | if (preferred != INFINITY_LIFE_TIME) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3576 | long tval = (jiffies - ifa->tstamp)/HZ; |
Jens Rosenboom | a1faa69 | 2009-06-25 04:55:50 +0000 | [diff] [blame] | 3577 | if (preferred > tval) |
| 3578 | preferred -= tval; |
| 3579 | else |
| 3580 | preferred = 0; |
Ben Hutchings | f56619f | 2010-06-26 11:37:47 +0000 | [diff] [blame] | 3581 | if (valid != INFINITY_LIFE_TIME) { |
| 3582 | if (valid > tval) |
| 3583 | valid -= tval; |
| 3584 | else |
| 3585 | valid = 0; |
| 3586 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3587 | } |
| 3588 | } else { |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3589 | preferred = INFINITY_LIFE_TIME; |
| 3590 | valid = INFINITY_LIFE_TIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3591 | } |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3592 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3593 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3594 | put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { |
| 3595 | nlmsg_cancel(skb, nlh); |
| 3596 | return -EMSGSIZE; |
| 3597 | } |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3598 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3599 | return nlmsg_end(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3600 | } |
| 3601 | |
| 3602 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, |
Jamal Hadi Salim | e431b8c | 2005-06-18 22:55:31 -0700 | [diff] [blame] | 3603 | u32 pid, u32 seq, int event, u16 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3604 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3605 | struct nlmsghdr *nlh; |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3606 | u8 scope = RT_SCOPE_UNIVERSE; |
| 3607 | int ifindex = ifmca->idev->dev->ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3608 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3609 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) |
| 3610 | scope = RT_SCOPE_SITE; |
| 3611 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3612 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
| 3613 | if (nlh == NULL) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3614 | return -EMSGSIZE; |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3615 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3616 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3617 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || |
| 3618 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3619 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
| 3620 | nlmsg_cancel(skb, nlh); |
| 3621 | return -EMSGSIZE; |
| 3622 | } |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3623 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3624 | return nlmsg_end(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3625 | } |
| 3626 | |
| 3627 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, |
Jamal Hadi Salim | b6544c0 | 2005-06-18 22:54:12 -0700 | [diff] [blame] | 3628 | u32 pid, u32 seq, int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3629 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3630 | struct nlmsghdr *nlh; |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3631 | u8 scope = RT_SCOPE_UNIVERSE; |
| 3632 | int ifindex = ifaca->aca_idev->dev->ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3633 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3634 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) |
| 3635 | scope = RT_SCOPE_SITE; |
| 3636 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3637 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
| 3638 | if (nlh == NULL) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3639 | return -EMSGSIZE; |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3640 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3641 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3642 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || |
| 3643 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3644 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
| 3645 | nlmsg_cancel(skb, nlh); |
| 3646 | return -EMSGSIZE; |
| 3647 | } |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3648 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3649 | return nlmsg_end(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3650 | } |
| 3651 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 3652 | enum addr_type_t { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3653 | UNICAST_ADDR, |
| 3654 | MULTICAST_ADDR, |
| 3655 | ANYCAST_ADDR, |
| 3656 | }; |
| 3657 | |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 3658 | /* called with rcu_read_lock() */ |
| 3659 | static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb, |
| 3660 | struct netlink_callback *cb, enum addr_type_t type, |
| 3661 | int s_ip_idx, int *p_ip_idx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3662 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3663 | struct ifmcaddr6 *ifmca; |
| 3664 | struct ifacaddr6 *ifaca; |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 3665 | int err = 1; |
| 3666 | int ip_idx = *p_ip_idx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3667 | |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 3668 | read_lock_bh(&idev->lock); |
| 3669 | switch (type) { |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 3670 | case UNICAST_ADDR: { |
| 3671 | struct inet6_ifaddr *ifa; |
| 3672 | |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 3673 | /* unicast address incl. temp addr */ |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 3674 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
| 3675 | if (++ip_idx < s_ip_idx) |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 3676 | continue; |
| 3677 | err = inet6_fill_ifaddr(skb, ifa, |
| 3678 | NETLINK_CB(cb->skb).pid, |
| 3679 | cb->nlh->nlmsg_seq, |
| 3680 | RTM_NEWADDR, |
| 3681 | NLM_F_MULTI); |
| 3682 | if (err <= 0) |
| 3683 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3684 | } |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 3685 | break; |
stephen hemminger | 502a2ff | 2010-03-17 20:31:13 +0000 | [diff] [blame] | 3686 | } |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 3687 | case MULTICAST_ADDR: |
| 3688 | /* multicast address */ |
| 3689 | for (ifmca = idev->mc_list; ifmca; |
| 3690 | ifmca = ifmca->next, ip_idx++) { |
| 3691 | if (ip_idx < s_ip_idx) |
| 3692 | continue; |
| 3693 | err = inet6_fill_ifmcaddr(skb, ifmca, |
| 3694 | NETLINK_CB(cb->skb).pid, |
| 3695 | cb->nlh->nlmsg_seq, |
| 3696 | RTM_GETMULTICAST, |
| 3697 | NLM_F_MULTI); |
| 3698 | if (err <= 0) |
| 3699 | break; |
| 3700 | } |
| 3701 | break; |
| 3702 | case ANYCAST_ADDR: |
| 3703 | /* anycast address */ |
| 3704 | for (ifaca = idev->ac_list; ifaca; |
| 3705 | ifaca = ifaca->aca_next, ip_idx++) { |
| 3706 | if (ip_idx < s_ip_idx) |
| 3707 | continue; |
| 3708 | err = inet6_fill_ifacaddr(skb, ifaca, |
| 3709 | NETLINK_CB(cb->skb).pid, |
| 3710 | cb->nlh->nlmsg_seq, |
| 3711 | RTM_GETANYCAST, |
| 3712 | NLM_F_MULTI); |
| 3713 | if (err <= 0) |
| 3714 | break; |
| 3715 | } |
| 3716 | break; |
| 3717 | default: |
| 3718 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3719 | } |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 3720 | read_unlock_bh(&idev->lock); |
| 3721 | *p_ip_idx = ip_idx; |
| 3722 | return err; |
| 3723 | } |
| 3724 | |
| 3725 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, |
| 3726 | enum addr_type_t type) |
| 3727 | { |
| 3728 | struct net *net = sock_net(skb->sk); |
| 3729 | int h, s_h; |
| 3730 | int idx, ip_idx; |
| 3731 | int s_idx, s_ip_idx; |
| 3732 | struct net_device *dev; |
| 3733 | struct inet6_dev *idev; |
| 3734 | struct hlist_head *head; |
| 3735 | struct hlist_node *node; |
| 3736 | |
| 3737 | s_h = cb->args[0]; |
| 3738 | s_idx = idx = cb->args[1]; |
| 3739 | s_ip_idx = ip_idx = cb->args[2]; |
| 3740 | |
| 3741 | rcu_read_lock(); |
| 3742 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
| 3743 | idx = 0; |
| 3744 | head = &net->dev_index_head[h]; |
| 3745 | hlist_for_each_entry_rcu(dev, node, head, index_hlist) { |
| 3746 | if (idx < s_idx) |
| 3747 | goto cont; |
Patrick McHardy | 4b97efd | 2010-03-26 20:27:49 -0700 | [diff] [blame] | 3748 | if (h > s_h || idx > s_idx) |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 3749 | s_ip_idx = 0; |
| 3750 | ip_idx = 0; |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 3751 | idev = __in6_dev_get(dev); |
| 3752 | if (!idev) |
Eric Dumazet | 234b27c | 2009-11-12 04:11:50 +0000 | [diff] [blame] | 3753 | goto cont; |
| 3754 | |
| 3755 | if (in6_dump_addrs(idev, skb, cb, type, |
| 3756 | s_ip_idx, &ip_idx) <= 0) |
| 3757 | goto done; |
| 3758 | cont: |
| 3759 | idx++; |
| 3760 | } |
| 3761 | } |
| 3762 | done: |
| 3763 | rcu_read_unlock(); |
| 3764 | cb->args[0] = h; |
| 3765 | cb->args[1] = idx; |
| 3766 | cb->args[2] = ip_idx; |
| 3767 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3768 | return skb->len; |
| 3769 | } |
| 3770 | |
| 3771 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) |
| 3772 | { |
| 3773 | enum addr_type_t type = UNICAST_ADDR; |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 3774 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3775 | return inet6_dump_addr(skb, cb, type); |
| 3776 | } |
| 3777 | |
| 3778 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) |
| 3779 | { |
| 3780 | enum addr_type_t type = MULTICAST_ADDR; |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 3781 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3782 | return inet6_dump_addr(skb, cb, type); |
| 3783 | } |
| 3784 | |
| 3785 | |
| 3786 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) |
| 3787 | { |
| 3788 | enum addr_type_t type = ANYCAST_ADDR; |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 3789 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3790 | return inet6_dump_addr(skb, cb, type); |
| 3791 | } |
| 3792 | |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 3793 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh, |
| 3794 | void *arg) |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3795 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 3796 | struct net *net = sock_net(in_skb->sk); |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 3797 | struct ifaddrmsg *ifm; |
| 3798 | struct nlattr *tb[IFA_MAX+1]; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3799 | struct in6_addr *addr = NULL; |
| 3800 | struct net_device *dev = NULL; |
| 3801 | struct inet6_ifaddr *ifa; |
| 3802 | struct sk_buff *skb; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3803 | int err; |
| 3804 | |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 3805 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
| 3806 | if (err < 0) |
| 3807 | goto errout; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3808 | |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 3809 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); |
| 3810 | if (addr == NULL) { |
| 3811 | err = -EINVAL; |
| 3812 | goto errout; |
| 3813 | } |
| 3814 | |
| 3815 | ifm = nlmsg_data(nlh); |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3816 | if (ifm->ifa_index) |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 3817 | dev = __dev_get_by_index(net, ifm->ifa_index); |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3818 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 3819 | ifa = ipv6_get_ifaddr(net, addr, dev, 1); |
| 3820 | if (!ifa) { |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 3821 | err = -EADDRNOTAVAIL; |
| 3822 | goto errout; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3823 | } |
| 3824 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 3825 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL); |
| 3826 | if (!skb) { |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 3827 | err = -ENOBUFS; |
| 3828 | goto errout_ifa; |
| 3829 | } |
| 3830 | |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3831 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, |
| 3832 | nlh->nlmsg_seq, RTM_NEWADDR, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3833 | if (err < 0) { |
| 3834 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ |
| 3835 | WARN_ON(err == -EMSGSIZE); |
| 3836 | kfree_skb(skb); |
| 3837 | goto errout_ifa; |
| 3838 | } |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 3839 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid); |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 3840 | errout_ifa: |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3841 | in6_ifa_put(ifa); |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 3842 | errout: |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3843 | return err; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3844 | } |
| 3845 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3846 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
| 3847 | { |
| 3848 | struct sk_buff *skb; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 3849 | struct net *net = dev_net(ifa->idev->dev); |
Thomas Graf | 5d62026 | 2006-08-15 00:35:02 -0700 | [diff] [blame] | 3850 | int err = -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3851 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3852 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
Thomas Graf | 5d62026 | 2006-08-15 00:35:02 -0700 | [diff] [blame] | 3853 | if (skb == NULL) |
| 3854 | goto errout; |
| 3855 | |
| 3856 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3857 | if (err < 0) { |
| 3858 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ |
| 3859 | WARN_ON(err == -EMSGSIZE); |
| 3860 | kfree_skb(skb); |
| 3861 | goto errout; |
| 3862 | } |
Pablo Neira Ayuso | 1ce85fe | 2009-02-24 23:18:28 -0800 | [diff] [blame] | 3863 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
| 3864 | return; |
Thomas Graf | 5d62026 | 2006-08-15 00:35:02 -0700 | [diff] [blame] | 3865 | errout: |
| 3866 | if (err < 0) |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 3867 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3868 | } |
| 3869 | |
Dave Jones | b6f99a2 | 2007-03-22 12:27:49 -0700 | [diff] [blame] | 3870 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3871 | __s32 *array, int bytes) |
| 3872 | { |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3873 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
| 3874 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3875 | memset(array, 0, bytes); |
| 3876 | array[DEVCONF_FORWARDING] = cnf->forwarding; |
| 3877 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; |
| 3878 | array[DEVCONF_MTU6] = cnf->mtu6; |
| 3879 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; |
| 3880 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; |
| 3881 | array[DEVCONF_AUTOCONF] = cnf->autoconf; |
| 3882 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; |
| 3883 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; |
Thomas Graf | 93908d1 | 2010-11-17 01:44:24 +0000 | [diff] [blame] | 3884 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = |
| 3885 | jiffies_to_msecs(cnf->rtr_solicit_interval); |
| 3886 | array[DEVCONF_RTR_SOLICIT_DELAY] = |
| 3887 | jiffies_to_msecs(cnf->rtr_solicit_delay); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3888 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; |
| 3889 | #ifdef CONFIG_IPV6_PRIVACY |
| 3890 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; |
| 3891 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; |
| 3892 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; |
| 3893 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; |
| 3894 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; |
| 3895 | #endif |
| 3896 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 3897 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 3898 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 3899 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 3900 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; |
Thomas Graf | 93908d1 | 2010-11-17 01:44:24 +0000 | [diff] [blame] | 3901 | array[DEVCONF_RTR_PROBE_INTERVAL] = |
| 3902 | jiffies_to_msecs(cnf->rtr_probe_interval); |
Neil Horman | fa03ef3 | 2007-01-30 14:30:10 -0800 | [diff] [blame] | 3903 | #ifdef CONFIG_IPV6_ROUTE_INFO |
YOSHIFUJI Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 3904 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
| 3905 | #endif |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 3906 | #endif |
YOSHIFUJI Hideaki | fbea49e | 2006-09-22 14:43:49 -0700 | [diff] [blame] | 3907 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 3908 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 3909 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 3910 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; |
| 3911 | #endif |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 3912 | #ifdef CONFIG_IPV6_MROUTE |
| 3913 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; |
| 3914 | #endif |
YOSHIFUJI Hideaki | 778d80b | 2008-06-28 14:17:11 +0900 | [diff] [blame] | 3915 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 3916 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
Cosmin Ratiu | c3faca0 | 2009-10-09 03:11:14 +0000 | [diff] [blame] | 3917 | array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3918 | } |
| 3919 | |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 3920 | static inline size_t inet6_ifla6_size(void) |
| 3921 | { |
| 3922 | return nla_total_size(4) /* IFLA_INET6_FLAGS */ |
| 3923 | + nla_total_size(sizeof(struct ifla_cacheinfo)) |
| 3924 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ |
| 3925 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ |
| 3926 | + nla_total_size(ICMP6_MIB_MAX * 8); /* IFLA_INET6_ICMP6STATS */ |
| 3927 | } |
| 3928 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 3929 | static inline size_t inet6_if_nlmsg_size(void) |
| 3930 | { |
| 3931 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) |
| 3932 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ |
| 3933 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ |
| 3934 | + nla_total_size(4) /* IFLA_MTU */ |
| 3935 | + nla_total_size(4) /* IFLA_LINK */ |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 3936 | + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */ |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 3937 | } |
YOSHIFUJI Hideaki | c5396a3 | 2006-06-17 22:48:48 -0700 | [diff] [blame] | 3938 | |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 3939 | static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib, |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 3940 | int items, int bytes) |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 3941 | { |
| 3942 | int i; |
| 3943 | int pad = bytes - sizeof(u64) * items; |
| 3944 | BUG_ON(pad < 0); |
| 3945 | |
| 3946 | /* Use put_unaligned() because stats may not be aligned for u64. */ |
| 3947 | put_unaligned(items, &stats[0]); |
| 3948 | for (i = 1; i < items; i++) |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 3949 | put_unaligned(atomic_long_read(&mib[i]), &stats[i]); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 3950 | |
| 3951 | memset(&stats[items], 0, pad); |
| 3952 | } |
| 3953 | |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 3954 | static inline void __snmp6_fill_stats64(u64 *stats, void __percpu **mib, |
| 3955 | int items, int bytes, size_t syncpoff) |
| 3956 | { |
| 3957 | int i; |
| 3958 | int pad = bytes - sizeof(u64) * items; |
| 3959 | BUG_ON(pad < 0); |
| 3960 | |
| 3961 | /* Use put_unaligned() because stats may not be aligned for u64. */ |
| 3962 | put_unaligned(items, &stats[0]); |
| 3963 | for (i = 1; i < items; i++) |
| 3964 | put_unaligned(snmp_fold_field64(mib, i, syncpoff), &stats[i]); |
| 3965 | |
| 3966 | memset(&stats[items], 0, pad); |
| 3967 | } |
| 3968 | |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 3969 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, |
| 3970 | int bytes) |
| 3971 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 3972 | switch (attrtype) { |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 3973 | case IFLA_INET6_STATS: |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 3974 | __snmp6_fill_stats64(stats, (void __percpu **)idev->stats.ipv6, |
| 3975 | IPSTATS_MIB_MAX, bytes, offsetof(struct ipstats_mib, syncp)); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 3976 | break; |
| 3977 | case IFLA_INET6_ICMP6STATS: |
Eric Dumazet | be281e5 | 2011-05-19 01:14:23 +0000 | [diff] [blame] | 3978 | __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, ICMP6_MIB_MAX, bytes); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 3979 | break; |
| 3980 | } |
| 3981 | } |
| 3982 | |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 3983 | 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] | 3984 | { |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 3985 | struct nlattr *nla; |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3986 | struct ifla_cacheinfo ci; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3987 | |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3988 | NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3989 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3990 | ci.max_reasm_len = IPV6_MAXPLEN; |
David S. Miller | 2491242 | 2010-11-19 13:13:47 -0800 | [diff] [blame] | 3991 | ci.tstamp = cstamp_delta(idev->tstamp); |
| 3992 | ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time); |
| 3993 | ci.retrans_time = jiffies_to_msecs(idev->nd_parms->retrans_time); |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3994 | NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); |
| 3995 | |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 3996 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
| 3997 | if (nla == NULL) |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3998 | goto nla_put_failure; |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 3999 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4000 | |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 4001 | /* XXX - MC not implemented */ |
| 4002 | |
| 4003 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); |
| 4004 | if (nla == NULL) |
| 4005 | goto nla_put_failure; |
| 4006 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); |
| 4007 | |
| 4008 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); |
| 4009 | if (nla == NULL) |
| 4010 | goto nla_put_failure; |
| 4011 | 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] | 4012 | |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 4013 | return 0; |
| 4014 | |
| 4015 | nla_put_failure: |
| 4016 | return -EMSGSIZE; |
| 4017 | } |
| 4018 | |
| 4019 | static size_t inet6_get_link_af_size(const struct net_device *dev) |
| 4020 | { |
| 4021 | if (!__in6_dev_get(dev)) |
| 4022 | return 0; |
| 4023 | |
| 4024 | return inet6_ifla6_size(); |
| 4025 | } |
| 4026 | |
| 4027 | static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev) |
| 4028 | { |
| 4029 | struct inet6_dev *idev = __in6_dev_get(dev); |
| 4030 | |
| 4031 | if (!idev) |
| 4032 | return -ENODATA; |
| 4033 | |
| 4034 | if (inet6_fill_ifla6_attrs(skb, idev) < 0) |
| 4035 | return -EMSGSIZE; |
| 4036 | |
| 4037 | return 0; |
| 4038 | } |
| 4039 | |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 4040 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
| 4041 | u32 pid, u32 seq, int event, unsigned int flags) |
| 4042 | { |
| 4043 | struct net_device *dev = idev->dev; |
| 4044 | struct ifinfomsg *hdr; |
| 4045 | struct nlmsghdr *nlh; |
| 4046 | void *protoinfo; |
| 4047 | |
| 4048 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); |
| 4049 | if (nlh == NULL) |
| 4050 | return -EMSGSIZE; |
| 4051 | |
| 4052 | hdr = nlmsg_data(nlh); |
| 4053 | hdr->ifi_family = AF_INET6; |
| 4054 | hdr->__ifi_pad = 0; |
| 4055 | hdr->ifi_type = dev->type; |
| 4056 | hdr->ifi_index = dev->ifindex; |
| 4057 | hdr->ifi_flags = dev_get_flags(dev); |
| 4058 | hdr->ifi_change = 0; |
| 4059 | |
| 4060 | NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); |
| 4061 | |
| 4062 | if (dev->addr_len) |
| 4063 | NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); |
| 4064 | |
| 4065 | NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); |
| 4066 | if (dev->ifindex != dev->iflink) |
| 4067 | NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); |
| 4068 | |
| 4069 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
| 4070 | if (protoinfo == NULL) |
| 4071 | goto nla_put_failure; |
| 4072 | |
| 4073 | if (inet6_fill_ifla6_attrs(skb, idev) < 0) |
| 4074 | goto nla_put_failure; |
| 4075 | |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 4076 | nla_nest_end(skb, protoinfo); |
| 4077 | return nlmsg_end(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4078 | |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 4079 | nla_put_failure: |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 4080 | nlmsg_cancel(skb, nlh); |
| 4081 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4082 | } |
| 4083 | |
| 4084 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) |
| 4085 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 4086 | struct net *net = sock_net(skb->sk); |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 4087 | int h, s_h; |
David S. Miller | 434a8a58 | 2009-11-11 18:53:00 -0800 | [diff] [blame] | 4088 | int idx = 0, s_idx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4089 | struct net_device *dev; |
| 4090 | struct inet6_dev *idev; |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 4091 | struct hlist_head *head; |
| 4092 | struct hlist_node *node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4093 | |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 4094 | s_h = cb->args[0]; |
| 4095 | s_idx = cb->args[1]; |
| 4096 | |
| 4097 | rcu_read_lock(); |
| 4098 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
| 4099 | idx = 0; |
| 4100 | head = &net->dev_index_head[h]; |
| 4101 | hlist_for_each_entry_rcu(dev, node, head, index_hlist) { |
| 4102 | if (idx < s_idx) |
| 4103 | goto cont; |
| 4104 | idev = __in6_dev_get(dev); |
| 4105 | if (!idev) |
| 4106 | goto cont; |
| 4107 | if (inet6_fill_ifinfo(skb, idev, |
| 4108 | NETLINK_CB(cb->skb).pid, |
| 4109 | cb->nlh->nlmsg_seq, |
| 4110 | RTM_NEWLINK, NLM_F_MULTI) <= 0) |
| 4111 | goto out; |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 4112 | cont: |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 4113 | idx++; |
| 4114 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4115 | } |
Eric Dumazet | 84d2697 | 2009-11-09 12:11:28 +0000 | [diff] [blame] | 4116 | out: |
| 4117 | rcu_read_unlock(); |
| 4118 | cb->args[1] = idx; |
| 4119 | cb->args[0] = h; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4120 | |
| 4121 | return skb->len; |
| 4122 | } |
| 4123 | |
| 4124 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) |
| 4125 | { |
| 4126 | struct sk_buff *skb; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 4127 | struct net *net = dev_net(idev->dev); |
Thomas Graf | 8d7a76c | 2006-08-15 00:35:47 -0700 | [diff] [blame] | 4128 | int err = -ENOBUFS; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4129 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 4130 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
Thomas Graf | 8d7a76c | 2006-08-15 00:35:47 -0700 | [diff] [blame] | 4131 | if (skb == NULL) |
| 4132 | goto errout; |
| 4133 | |
| 4134 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 4135 | if (err < 0) { |
| 4136 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ |
| 4137 | WARN_ON(err == -EMSGSIZE); |
| 4138 | kfree_skb(skb); |
| 4139 | goto errout; |
| 4140 | } |
Nicolas Dichtel | 5f75a10 | 2010-12-07 23:38:31 +0000 | [diff] [blame] | 4141 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC); |
Pablo Neira Ayuso | 1ce85fe | 2009-02-24 23:18:28 -0800 | [diff] [blame] | 4142 | return; |
Thomas Graf | 8d7a76c | 2006-08-15 00:35:47 -0700 | [diff] [blame] | 4143 | errout: |
| 4144 | if (err < 0) |
Nicolas Dichtel | 5f75a10 | 2010-12-07 23:38:31 +0000 | [diff] [blame] | 4145 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4146 | } |
| 4147 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 4148 | static inline size_t inet6_prefix_nlmsg_size(void) |
| 4149 | { |
| 4150 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) |
| 4151 | + nla_total_size(sizeof(struct in6_addr)) |
| 4152 | + nla_total_size(sizeof(struct prefix_cacheinfo)); |
| 4153 | } |
YOSHIFUJI Hideaki | c5396a3 | 2006-06-17 22:48:48 -0700 | [diff] [blame] | 4154 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4155 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 4156 | struct prefix_info *pinfo, u32 pid, u32 seq, |
| 4157 | int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4158 | { |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 4159 | struct prefixmsg *pmsg; |
| 4160 | struct nlmsghdr *nlh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4161 | struct prefix_cacheinfo ci; |
| 4162 | |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 4163 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags); |
| 4164 | if (nlh == NULL) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 4165 | return -EMSGSIZE; |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 4166 | |
| 4167 | pmsg = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4168 | pmsg->prefix_family = AF_INET6; |
Patrick McHardy | 8a47077 | 2005-06-28 12:56:45 -0700 | [diff] [blame] | 4169 | pmsg->prefix_pad1 = 0; |
| 4170 | pmsg->prefix_pad2 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4171 | pmsg->prefix_ifindex = idev->dev->ifindex; |
| 4172 | pmsg->prefix_len = pinfo->prefix_len; |
| 4173 | pmsg->prefix_type = pinfo->type; |
Patrick McHardy | 8a47077 | 2005-06-28 12:56:45 -0700 | [diff] [blame] | 4174 | pmsg->prefix_pad3 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4175 | pmsg->prefix_flags = 0; |
| 4176 | if (pinfo->onlink) |
| 4177 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; |
| 4178 | if (pinfo->autoconf) |
| 4179 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; |
| 4180 | |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 4181 | NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4182 | |
| 4183 | ci.preferred_time = ntohl(pinfo->prefered); |
| 4184 | ci.valid_time = ntohl(pinfo->valid); |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 4185 | NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4186 | |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 4187 | return nlmsg_end(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4188 | |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 4189 | nla_put_failure: |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 4190 | nlmsg_cancel(skb, nlh); |
| 4191 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4192 | } |
| 4193 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4194 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4195 | struct prefix_info *pinfo) |
| 4196 | { |
| 4197 | struct sk_buff *skb; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 4198 | struct net *net = dev_net(idev->dev); |
Thomas Graf | 8c384bfa | 2006-08-15 00:36:07 -0700 | [diff] [blame] | 4199 | int err = -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4200 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 4201 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
Thomas Graf | 8c384bfa | 2006-08-15 00:36:07 -0700 | [diff] [blame] | 4202 | if (skb == NULL) |
| 4203 | goto errout; |
| 4204 | |
| 4205 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 4206 | if (err < 0) { |
| 4207 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ |
| 4208 | WARN_ON(err == -EMSGSIZE); |
| 4209 | kfree_skb(skb); |
| 4210 | goto errout; |
| 4211 | } |
Pablo Neira Ayuso | 1ce85fe | 2009-02-24 23:18:28 -0800 | [diff] [blame] | 4212 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
| 4213 | return; |
Thomas Graf | 8c384bfa | 2006-08-15 00:36:07 -0700 | [diff] [blame] | 4214 | errout: |
| 4215 | if (err < 0) |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 4216 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4217 | } |
| 4218 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4219 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
| 4220 | { |
| 4221 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); |
| 4222 | |
| 4223 | switch (event) { |
| 4224 | case RTM_NEWADDR: |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 4225 | /* |
| 4226 | * If the address was optimistic |
| 4227 | * we inserted the route at the start of |
| 4228 | * our DAD process, so we don't need |
| 4229 | * to do it again |
| 4230 | */ |
| 4231 | if (!(ifp->rt->rt6i_node)) |
| 4232 | ip6_ins_rt(ifp->rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4233 | if (ifp->idev->cnf.forwarding) |
| 4234 | addrconf_join_anycast(ifp); |
| 4235 | break; |
| 4236 | case RTM_DELADDR: |
| 4237 | if (ifp->idev->cnf.forwarding) |
| 4238 | addrconf_leave_anycast(ifp); |
| 4239 | addrconf_leave_solict(ifp->idev, &ifp->addr); |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 4240 | dst_hold(&ifp->rt->dst); |
stephen hemminger | 93fa159 | 2010-04-12 05:41:31 +0000 | [diff] [blame] | 4241 | |
David S. Miller | 73a8bd7 | 2011-01-23 23:27:15 -0800 | [diff] [blame] | 4242 | if (ip6_del_rt(ifp->rt)) |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 4243 | dst_free(&ifp->rt->dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4244 | break; |
| 4245 | } |
| 4246 | } |
| 4247 | |
| 4248 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
| 4249 | { |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 4250 | rcu_read_lock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4251 | if (likely(ifp->idev->dead == 0)) |
| 4252 | __ipv6_ifa_notify(event, ifp); |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 4253 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4254 | } |
| 4255 | |
| 4256 | #ifdef CONFIG_SYSCTL |
| 4257 | |
| 4258 | static |
Alexey Dobriyan | 8d65af7 | 2009-09-23 15:57:19 -0700 | [diff] [blame] | 4259 | int addrconf_sysctl_forward(ctl_table *ctl, int write, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4260 | void __user *buffer, size_t *lenp, loff_t *ppos) |
| 4261 | { |
| 4262 | int *valp = ctl->data; |
| 4263 | int val = *valp; |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 4264 | loff_t pos = *ppos; |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 4265 | ctl_table lctl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4266 | int ret; |
| 4267 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 4268 | /* |
| 4269 | * ctl->data points to idev->cnf.forwarding, we should |
| 4270 | * not modify it until we get the rtnl lock. |
| 4271 | */ |
| 4272 | lctl = *ctl; |
| 4273 | lctl.data = &val; |
| 4274 | |
| 4275 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4276 | |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 4277 | if (write) |
Stephen Hemminger | b325fdd | 2009-02-26 06:55:31 +0000 | [diff] [blame] | 4278 | ret = addrconf_fixup_forwarding(ctl, valp, val); |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 4279 | if (ret) |
| 4280 | *ppos = pos; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4281 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4282 | } |
| 4283 | |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4284 | static void dev_disable_change(struct inet6_dev *idev) |
| 4285 | { |
| 4286 | if (!idev || !idev->dev) |
| 4287 | return; |
| 4288 | |
| 4289 | if (idev->cnf.disable_ipv6) |
| 4290 | addrconf_notify(NULL, NETDEV_DOWN, idev->dev); |
| 4291 | else |
| 4292 | addrconf_notify(NULL, NETDEV_UP, idev->dev); |
| 4293 | } |
| 4294 | |
| 4295 | static void addrconf_disable_change(struct net *net, __s32 newf) |
| 4296 | { |
| 4297 | struct net_device *dev; |
| 4298 | struct inet6_dev *idev; |
| 4299 | |
Eric Dumazet | c6d14c8 | 2009-11-04 05:43:23 -0800 | [diff] [blame] | 4300 | rcu_read_lock(); |
| 4301 | for_each_netdev_rcu(net, dev) { |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4302 | idev = __in6_dev_get(dev); |
| 4303 | if (idev) { |
| 4304 | int changed = (!idev->cnf.disable_ipv6) ^ (!newf); |
| 4305 | idev->cnf.disable_ipv6 = newf; |
| 4306 | if (changed) |
| 4307 | dev_disable_change(idev); |
| 4308 | } |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4309 | } |
Eric Dumazet | c6d14c8 | 2009-11-04 05:43:23 -0800 | [diff] [blame] | 4310 | rcu_read_unlock(); |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4311 | } |
| 4312 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 4313 | 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] | 4314 | { |
| 4315 | struct net *net; |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 4316 | int old; |
| 4317 | |
| 4318 | if (!rtnl_trylock()) |
| 4319 | return restart_syscall(); |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4320 | |
| 4321 | net = (struct net *)table->extra2; |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 4322 | old = *p; |
| 4323 | *p = newf; |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4324 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 4325 | if (p == &net->ipv6.devconf_dflt->disable_ipv6) { |
| 4326 | rtnl_unlock(); |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4327 | return 0; |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 4328 | } |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4329 | |
| 4330 | if (p == &net->ipv6.devconf_all->disable_ipv6) { |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4331 | net->ipv6.devconf_dflt->disable_ipv6 = newf; |
| 4332 | addrconf_disable_change(net, newf); |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 4333 | } else if ((!newf) ^ (!old)) |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4334 | dev_disable_change((struct inet6_dev *)table->extra1); |
| 4335 | |
| 4336 | rtnl_unlock(); |
| 4337 | return 0; |
| 4338 | } |
| 4339 | |
| 4340 | static |
Alexey Dobriyan | 8d65af7 | 2009-09-23 15:57:19 -0700 | [diff] [blame] | 4341 | int addrconf_sysctl_disable(ctl_table *ctl, int write, |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4342 | void __user *buffer, size_t *lenp, loff_t *ppos) |
| 4343 | { |
| 4344 | int *valp = ctl->data; |
| 4345 | int val = *valp; |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 4346 | loff_t pos = *ppos; |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 4347 | ctl_table lctl; |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4348 | int ret; |
| 4349 | |
Francesco Ruggeri | 013d97e | 2012-01-16 10:40:10 +0000 | [diff] [blame] | 4350 | /* |
| 4351 | * ctl->data points to idev->cnf.disable_ipv6, we should |
| 4352 | * not modify it until we get the rtnl lock. |
| 4353 | */ |
| 4354 | lctl = *ctl; |
| 4355 | lctl.data = &val; |
| 4356 | |
| 4357 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4358 | |
| 4359 | if (write) |
| 4360 | ret = addrconf_disable_ipv6(ctl, valp, val); |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 4361 | if (ret) |
| 4362 | *ppos = pos; |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4363 | return ret; |
| 4364 | } |
| 4365 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4366 | static struct addrconf_sysctl_table |
| 4367 | { |
| 4368 | struct ctl_table_header *sysctl_header; |
YOSHIFUJI Hideaki | f6a07b2 | 2008-03-25 00:25:11 +0900 | [diff] [blame] | 4369 | ctl_table addrconf_vars[DEVCONF_MAX+1]; |
Pavel Emelyanov | 1dab622 | 2007-12-02 00:59:38 +1100 | [diff] [blame] | 4370 | char *dev_name; |
Brian Haley | ab32ea5 | 2006-09-22 14:15:41 -0700 | [diff] [blame] | 4371 | } addrconf_sysctl __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4372 | .sysctl_header = NULL, |
| 4373 | .addrconf_vars = { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4374 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4375 | .procname = "forwarding", |
| 4376 | .data = &ipv6_devconf.forwarding, |
| 4377 | .maxlen = sizeof(int), |
| 4378 | .mode = 0644, |
| 4379 | .proc_handler = addrconf_sysctl_forward, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4380 | }, |
| 4381 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4382 | .procname = "hop_limit", |
| 4383 | .data = &ipv6_devconf.hop_limit, |
| 4384 | .maxlen = sizeof(int), |
| 4385 | .mode = 0644, |
| 4386 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4387 | }, |
| 4388 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4389 | .procname = "mtu", |
| 4390 | .data = &ipv6_devconf.mtu6, |
| 4391 | .maxlen = sizeof(int), |
| 4392 | .mode = 0644, |
| 4393 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4394 | }, |
| 4395 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4396 | .procname = "accept_ra", |
| 4397 | .data = &ipv6_devconf.accept_ra, |
| 4398 | .maxlen = sizeof(int), |
| 4399 | .mode = 0644, |
| 4400 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4401 | }, |
| 4402 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4403 | .procname = "accept_redirects", |
| 4404 | .data = &ipv6_devconf.accept_redirects, |
| 4405 | .maxlen = sizeof(int), |
| 4406 | .mode = 0644, |
| 4407 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4408 | }, |
| 4409 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4410 | .procname = "autoconf", |
| 4411 | .data = &ipv6_devconf.autoconf, |
| 4412 | .maxlen = sizeof(int), |
| 4413 | .mode = 0644, |
| 4414 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4415 | }, |
| 4416 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4417 | .procname = "dad_transmits", |
| 4418 | .data = &ipv6_devconf.dad_transmits, |
| 4419 | .maxlen = sizeof(int), |
| 4420 | .mode = 0644, |
| 4421 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4422 | }, |
| 4423 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4424 | .procname = "router_solicitations", |
| 4425 | .data = &ipv6_devconf.rtr_solicits, |
| 4426 | .maxlen = sizeof(int), |
| 4427 | .mode = 0644, |
| 4428 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4429 | }, |
| 4430 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4431 | .procname = "router_solicitation_interval", |
| 4432 | .data = &ipv6_devconf.rtr_solicit_interval, |
| 4433 | .maxlen = sizeof(int), |
| 4434 | .mode = 0644, |
| 4435 | .proc_handler = proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4436 | }, |
| 4437 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4438 | .procname = "router_solicitation_delay", |
| 4439 | .data = &ipv6_devconf.rtr_solicit_delay, |
| 4440 | .maxlen = sizeof(int), |
| 4441 | .mode = 0644, |
| 4442 | .proc_handler = proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4443 | }, |
| 4444 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4445 | .procname = "force_mld_version", |
| 4446 | .data = &ipv6_devconf.force_mld_version, |
| 4447 | .maxlen = sizeof(int), |
| 4448 | .mode = 0644, |
| 4449 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4450 | }, |
| 4451 | #ifdef CONFIG_IPV6_PRIVACY |
| 4452 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4453 | .procname = "use_tempaddr", |
| 4454 | .data = &ipv6_devconf.use_tempaddr, |
| 4455 | .maxlen = sizeof(int), |
| 4456 | .mode = 0644, |
| 4457 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4458 | }, |
| 4459 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4460 | .procname = "temp_valid_lft", |
| 4461 | .data = &ipv6_devconf.temp_valid_lft, |
| 4462 | .maxlen = sizeof(int), |
| 4463 | .mode = 0644, |
| 4464 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4465 | }, |
| 4466 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4467 | .procname = "temp_prefered_lft", |
| 4468 | .data = &ipv6_devconf.temp_prefered_lft, |
| 4469 | .maxlen = sizeof(int), |
| 4470 | .mode = 0644, |
| 4471 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4472 | }, |
| 4473 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4474 | .procname = "regen_max_retry", |
| 4475 | .data = &ipv6_devconf.regen_max_retry, |
| 4476 | .maxlen = sizeof(int), |
| 4477 | .mode = 0644, |
| 4478 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4479 | }, |
| 4480 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4481 | .procname = "max_desync_factor", |
| 4482 | .data = &ipv6_devconf.max_desync_factor, |
| 4483 | .maxlen = sizeof(int), |
| 4484 | .mode = 0644, |
| 4485 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4486 | }, |
| 4487 | #endif |
| 4488 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4489 | .procname = "max_addresses", |
| 4490 | .data = &ipv6_devconf.max_addresses, |
| 4491 | .maxlen = sizeof(int), |
| 4492 | .mode = 0644, |
| 4493 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4494 | }, |
| 4495 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4496 | .procname = "accept_ra_defrtr", |
| 4497 | .data = &ipv6_devconf.accept_ra_defrtr, |
| 4498 | .maxlen = sizeof(int), |
| 4499 | .mode = 0644, |
| 4500 | .proc_handler = proc_dointvec, |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 4501 | }, |
| 4502 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4503 | .procname = "accept_ra_pinfo", |
| 4504 | .data = &ipv6_devconf.accept_ra_pinfo, |
| 4505 | .maxlen = sizeof(int), |
| 4506 | .mode = 0644, |
| 4507 | .proc_handler = proc_dointvec, |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 4508 | }, |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 4509 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 4510 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4511 | .procname = "accept_ra_rtr_pref", |
| 4512 | .data = &ipv6_devconf.accept_ra_rtr_pref, |
| 4513 | .maxlen = sizeof(int), |
| 4514 | .mode = 0644, |
| 4515 | .proc_handler = proc_dointvec, |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 4516 | }, |
YOSHIFUJI Hideaki | 52e1635 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 4517 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4518 | .procname = "router_probe_interval", |
| 4519 | .data = &ipv6_devconf.rtr_probe_interval, |
| 4520 | .maxlen = sizeof(int), |
| 4521 | .mode = 0644, |
| 4522 | .proc_handler = proc_dointvec_jiffies, |
YOSHIFUJI Hideaki | 52e1635 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 4523 | }, |
Neil Horman | fa03ef3 | 2007-01-30 14:30:10 -0800 | [diff] [blame] | 4524 | #ifdef CONFIG_IPV6_ROUTE_INFO |
YOSHIFUJI Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 4525 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4526 | .procname = "accept_ra_rt_info_max_plen", |
| 4527 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, |
| 4528 | .maxlen = sizeof(int), |
| 4529 | .mode = 0644, |
| 4530 | .proc_handler = proc_dointvec, |
YOSHIFUJI Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 4531 | }, |
| 4532 | #endif |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 4533 | #endif |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 4534 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4535 | .procname = "proxy_ndp", |
| 4536 | .data = &ipv6_devconf.proxy_ndp, |
| 4537 | .maxlen = sizeof(int), |
| 4538 | .mode = 0644, |
| 4539 | .proc_handler = proc_dointvec, |
YOSHIFUJI Hideaki | fbea49e | 2006-09-22 14:43:49 -0700 | [diff] [blame] | 4540 | }, |
| 4541 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4542 | .procname = "accept_source_route", |
| 4543 | .data = &ipv6_devconf.accept_source_route, |
| 4544 | .maxlen = sizeof(int), |
| 4545 | .mode = 0644, |
| 4546 | .proc_handler = proc_dointvec, |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 4547 | }, |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 4548 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 4549 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4550 | .procname = "optimistic_dad", |
| 4551 | .data = &ipv6_devconf.optimistic_dad, |
| 4552 | .maxlen = sizeof(int), |
| 4553 | .mode = 0644, |
| 4554 | .proc_handler = proc_dointvec, |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 4555 | |
| 4556 | }, |
| 4557 | #endif |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 4558 | #ifdef CONFIG_IPV6_MROUTE |
| 4559 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4560 | .procname = "mc_forwarding", |
| 4561 | .data = &ipv6_devconf.mc_forwarding, |
| 4562 | .maxlen = sizeof(int), |
| 4563 | .mode = 0444, |
| 4564 | .proc_handler = proc_dointvec, |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 4565 | }, |
| 4566 | #endif |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 4567 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4568 | .procname = "disable_ipv6", |
| 4569 | .data = &ipv6_devconf.disable_ipv6, |
| 4570 | .maxlen = sizeof(int), |
| 4571 | .mode = 0644, |
| 4572 | .proc_handler = addrconf_sysctl_disable, |
YOSHIFUJI Hideaki | 778d80b | 2008-06-28 14:17:11 +0900 | [diff] [blame] | 4573 | }, |
| 4574 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4575 | .procname = "accept_dad", |
| 4576 | .data = &ipv6_devconf.accept_dad, |
| 4577 | .maxlen = sizeof(int), |
| 4578 | .mode = 0644, |
| 4579 | .proc_handler = proc_dointvec, |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 4580 | }, |
| 4581 | { |
Octavian Purdila | f7734fd | 2009-10-02 11:39:15 +0000 | [diff] [blame] | 4582 | .procname = "force_tllao", |
| 4583 | .data = &ipv6_devconf.force_tllao, |
| 4584 | .maxlen = sizeof(int), |
| 4585 | .mode = 0644, |
| 4586 | .proc_handler = proc_dointvec |
| 4587 | }, |
| 4588 | { |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 4589 | /* sentinel */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4590 | } |
| 4591 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4592 | }; |
| 4593 | |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 4594 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 4595 | struct inet6_dev *idev, struct ipv6_devconf *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4596 | { |
| 4597 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4598 | struct addrconf_sysctl_table *t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4599 | |
Pavel Emelyanov | 1dab622 | 2007-12-02 00:59:38 +1100 | [diff] [blame] | 4600 | #define ADDRCONF_CTL_PATH_DEV 3 |
| 4601 | |
| 4602 | struct ctl_path addrconf_ctl_path[] = { |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 4603 | { .procname = "net", }, |
| 4604 | { .procname = "ipv6", }, |
| 4605 | { .procname = "conf", }, |
Pavel Emelyanov | 1dab622 | 2007-12-02 00:59:38 +1100 | [diff] [blame] | 4606 | { /* to be set */ }, |
| 4607 | { }, |
| 4608 | }; |
| 4609 | |
| 4610 | |
Arnaldo Carvalho de Melo | af879cc | 2006-11-17 12:14:37 -0200 | [diff] [blame] | 4611 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4612 | if (t == NULL) |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 4613 | goto out; |
| 4614 | |
Stephen Hemminger | bcdd553 | 2010-03-20 16:08:18 -0700 | [diff] [blame] | 4615 | for (i = 0; t->addrconf_vars[i].data; i++) { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4616 | t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4617 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 4618 | t->addrconf_vars[i].extra2 = net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4619 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4620 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4621 | /* |
| 4622 | * Make a copy of dev_name, because '.procname' is regarded as const |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4623 | * by sysctl and we wouldn't want anyone to change it under our feet |
| 4624 | * (see SIOCSIFNAME). |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4625 | */ |
Pavel Emelyanov | 1dab622 | 2007-12-02 00:59:38 +1100 | [diff] [blame] | 4626 | t->dev_name = kstrdup(dev_name, GFP_KERNEL); |
| 4627 | if (!t->dev_name) |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 4628 | goto free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4629 | |
Pavel Emelyanov | 1dab622 | 2007-12-02 00:59:38 +1100 | [diff] [blame] | 4630 | addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4631 | |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 4632 | t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path, |
Pavel Emelyanov | 1dab622 | 2007-12-02 00:59:38 +1100 | [diff] [blame] | 4633 | t->addrconf_vars); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4634 | if (t->sysctl_header == NULL) |
| 4635 | goto free_procname; |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 4636 | |
| 4637 | p->sysctl = t; |
Pavel Emelyanov | 9589731 | 2008-01-10 17:41:45 -0800 | [diff] [blame] | 4638 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4639 | |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 4640 | free_procname: |
Pavel Emelyanov | 1dab622 | 2007-12-02 00:59:38 +1100 | [diff] [blame] | 4641 | kfree(t->dev_name); |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 4642 | free: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4643 | kfree(t); |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 4644 | out: |
Pavel Emelyanov | 9589731 | 2008-01-10 17:41:45 -0800 | [diff] [blame] | 4645 | return -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4646 | } |
| 4647 | |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 4648 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
| 4649 | { |
| 4650 | struct addrconf_sysctl_table *t; |
| 4651 | |
| 4652 | if (p->sysctl == NULL) |
| 4653 | return; |
| 4654 | |
| 4655 | t = p->sysctl; |
| 4656 | p->sysctl = NULL; |
Lucian Adrian Grijincu | ff53881 | 2011-05-01 01:44:01 +0000 | [diff] [blame] | 4657 | unregister_net_sysctl_table(t->sysctl_header); |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 4658 | kfree(t->dev_name); |
| 4659 | kfree(t); |
| 4660 | } |
| 4661 | |
Pavel Emelyanov | f52295a | 2007-12-02 00:58:37 +1100 | [diff] [blame] | 4662 | static void addrconf_sysctl_register(struct inet6_dev *idev) |
| 4663 | { |
Eric W. Biederman | 54716e3 | 2010-02-14 03:27:03 +0000 | [diff] [blame] | 4664 | neigh_sysctl_register(idev->dev, idev->nd_parms, "ipv6", |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 4665 | &ndisc_ifinfo_sysctl_change); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 4666 | __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 4667 | idev, &idev->cnf); |
Pavel Emelyanov | f52295a | 2007-12-02 00:58:37 +1100 | [diff] [blame] | 4668 | } |
| 4669 | |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 4670 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4671 | { |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 4672 | __addrconf_sysctl_unregister(&idev->cnf); |
| 4673 | neigh_sysctl_unregister(idev->nd_parms); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4674 | } |
| 4675 | |
| 4676 | |
| 4677 | #endif |
| 4678 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 4679 | static int __net_init addrconf_init_net(struct net *net) |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 4680 | { |
| 4681 | int err; |
| 4682 | struct ipv6_devconf *all, *dflt; |
| 4683 | |
| 4684 | err = -ENOMEM; |
| 4685 | all = &ipv6_devconf; |
| 4686 | dflt = &ipv6_devconf_dflt; |
| 4687 | |
Octavian Purdila | 09ad9bc | 2009-11-25 15:14:13 -0800 | [diff] [blame] | 4688 | if (!net_eq(net, &init_net)) { |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 4689 | all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL); |
| 4690 | if (all == NULL) |
| 4691 | goto err_alloc_all; |
| 4692 | |
| 4693 | dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); |
| 4694 | if (dflt == NULL) |
| 4695 | goto err_alloc_dflt; |
Brian Haley | 56d417b | 2009-06-01 03:07:33 -0700 | [diff] [blame] | 4696 | } else { |
| 4697 | /* these will be inherited by all namespaces */ |
| 4698 | dflt->autoconf = ipv6_defaults.autoconf; |
| 4699 | dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 4700 | } |
| 4701 | |
| 4702 | net->ipv6.devconf_all = all; |
| 4703 | net->ipv6.devconf_dflt = dflt; |
| 4704 | |
| 4705 | #ifdef CONFIG_SYSCTL |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 4706 | err = __addrconf_sysctl_register(net, "all", NULL, all); |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 4707 | if (err < 0) |
| 4708 | goto err_reg_all; |
| 4709 | |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 4710 | err = __addrconf_sysctl_register(net, "default", NULL, dflt); |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 4711 | if (err < 0) |
| 4712 | goto err_reg_dflt; |
| 4713 | #endif |
| 4714 | return 0; |
| 4715 | |
| 4716 | #ifdef CONFIG_SYSCTL |
| 4717 | err_reg_dflt: |
| 4718 | __addrconf_sysctl_unregister(all); |
| 4719 | err_reg_all: |
| 4720 | kfree(dflt); |
| 4721 | #endif |
| 4722 | err_alloc_dflt: |
| 4723 | kfree(all); |
| 4724 | err_alloc_all: |
| 4725 | return err; |
| 4726 | } |
| 4727 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 4728 | static void __net_exit addrconf_exit_net(struct net *net) |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 4729 | { |
| 4730 | #ifdef CONFIG_SYSCTL |
| 4731 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); |
| 4732 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); |
| 4733 | #endif |
Octavian Purdila | 09ad9bc | 2009-11-25 15:14:13 -0800 | [diff] [blame] | 4734 | if (!net_eq(net, &init_net)) { |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 4735 | kfree(net->ipv6.devconf_dflt); |
| 4736 | kfree(net->ipv6.devconf_all); |
| 4737 | } |
| 4738 | } |
| 4739 | |
| 4740 | static struct pernet_operations addrconf_ops = { |
| 4741 | .init = addrconf_init_net, |
| 4742 | .exit = addrconf_exit_net, |
| 4743 | }; |
| 4744 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4745 | /* |
| 4746 | * Device notifier |
| 4747 | */ |
| 4748 | |
| 4749 | int register_inet6addr_notifier(struct notifier_block *nb) |
| 4750 | { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4751 | return atomic_notifier_chain_register(&inet6addr_chain, nb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4752 | } |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 4753 | EXPORT_SYMBOL(register_inet6addr_notifier); |
| 4754 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4755 | int unregister_inet6addr_notifier(struct notifier_block *nb) |
| 4756 | { |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4757 | return atomic_notifier_chain_unregister(&inet6addr_chain, nb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4758 | } |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 4759 | EXPORT_SYMBOL(unregister_inet6addr_notifier); |
| 4760 | |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 4761 | static struct rtnl_af_ops inet6_ops = { |
| 4762 | .family = AF_INET6, |
| 4763 | .fill_link_af = inet6_fill_link_af, |
| 4764 | .get_link_af_size = inet6_get_link_af_size, |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 4765 | }; |
| 4766 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4767 | /* |
| 4768 | * Init / cleanup code |
| 4769 | */ |
| 4770 | |
| 4771 | int __init addrconf_init(void) |
| 4772 | { |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 4773 | int i, err; |
YOSHIFUJI Hideaki | 2a8cc6c | 2007-11-14 15:56:23 +0900 | [diff] [blame] | 4774 | |
Stephen Hemminger | e21e846 | 2010-03-20 16:09:01 -0700 | [diff] [blame] | 4775 | err = ipv6_addr_label_init(); |
| 4776 | if (err < 0) { |
| 4777 | printk(KERN_CRIT "IPv6 Addrconf:" |
| 4778 | " cannot initialize default policy table: %d.\n", err); |
Neil Horman | 2cc6d2b | 2010-09-24 09:55:52 +0000 | [diff] [blame] | 4779 | goto out; |
YOSHIFUJI Hideaki | 2a8cc6c | 2007-11-14 15:56:23 +0900 | [diff] [blame] | 4780 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4781 | |
Neil Horman | 2cc6d2b | 2010-09-24 09:55:52 +0000 | [diff] [blame] | 4782 | err = register_pernet_subsys(&addrconf_ops); |
| 4783 | if (err < 0) |
| 4784 | goto out_addrlabel; |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 4785 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4786 | /* The addrconf netdev notifier requires that loopback_dev |
| 4787 | * has it's ipv6 private information allocated and setup |
| 4788 | * before it can bring up and give link-local addresses |
| 4789 | * to other devices which are up. |
| 4790 | * |
| 4791 | * Unfortunately, loopback_dev is not necessarily the first |
| 4792 | * entry in the global dev_base list of net devices. In fact, |
| 4793 | * it is likely to be the very last entry on that list. |
| 4794 | * So this causes the notifier registry below to try and |
| 4795 | * give link-local addresses to all devices besides loopback_dev |
| 4796 | * first, then loopback_dev, which cases all the non-loopback_dev |
| 4797 | * devices to fail to get a link-local address. |
| 4798 | * |
| 4799 | * So, as a temporary fix, allocate the ipv6 structure for |
| 4800 | * loopback_dev first by hand. |
| 4801 | * Longer term, all of the dependencies ipv6 has upon the loopback |
| 4802 | * device and it being up should be removed. |
| 4803 | */ |
| 4804 | rtnl_lock(); |
Eric W. Biederman | 2774c7a | 2007-09-26 22:10:56 -0700 | [diff] [blame] | 4805 | if (!ipv6_add_dev(init_net.loopback_dev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4806 | err = -ENOMEM; |
| 4807 | rtnl_unlock(); |
| 4808 | if (err) |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 4809 | goto errlo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4810 | |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 4811 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
| 4812 | INIT_HLIST_HEAD(&inet6_addr_lst[i]); |
| 4813 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4814 | register_netdevice_notifier(&ipv6_dev_notf); |
| 4815 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4816 | addrconf_verify(0); |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 4817 | |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 4818 | err = rtnl_af_register(&inet6_ops); |
| 4819 | if (err < 0) |
| 4820 | goto errout_af; |
| 4821 | |
Greg Rose | c7ac867 | 2011-06-10 01:27:09 +0000 | [diff] [blame] | 4822 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo, |
| 4823 | NULL); |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 4824 | if (err < 0) |
| 4825 | goto errout; |
| 4826 | |
| 4827 | /* Only the first call to __rtnl_register can fail */ |
Greg Rose | c7ac867 | 2011-06-10 01:27:09 +0000 | [diff] [blame] | 4828 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL); |
| 4829 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL); |
| 4830 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, |
| 4831 | inet6_dump_ifaddr, NULL); |
| 4832 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, |
| 4833 | inet6_dump_ifmcaddr, NULL); |
| 4834 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, |
| 4835 | inet6_dump_ifacaddr, NULL); |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 4836 | |
YOSHIFUJI Hideaki | 2a8cc6c | 2007-11-14 15:56:23 +0900 | [diff] [blame] | 4837 | ipv6_addr_label_rtnl_register(); |
| 4838 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4839 | return 0; |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 4840 | errout: |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 4841 | rtnl_af_unregister(&inet6_ops); |
| 4842 | errout_af: |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 4843 | unregister_netdevice_notifier(&ipv6_dev_notf); |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 4844 | errlo: |
| 4845 | unregister_pernet_subsys(&addrconf_ops); |
Neil Horman | 2cc6d2b | 2010-09-24 09:55:52 +0000 | [diff] [blame] | 4846 | out_addrlabel: |
| 4847 | ipv6_addr_label_cleanup(); |
| 4848 | out: |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 4849 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4850 | } |
| 4851 | |
Daniel Lezcano | 09f7709 | 2007-12-13 05:34:58 -0800 | [diff] [blame] | 4852 | void addrconf_cleanup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4853 | { |
Daniel Lezcano | 176c39a | 2009-03-03 01:06:45 -0800 | [diff] [blame] | 4854 | struct net_device *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4855 | int i; |
| 4856 | |
| 4857 | unregister_netdevice_notifier(&ipv6_dev_notf); |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 4858 | unregister_pernet_subsys(&addrconf_ops); |
Neil Horman | 2cc6d2b | 2010-09-24 09:55:52 +0000 | [diff] [blame] | 4859 | ipv6_addr_label_cleanup(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4860 | |
| 4861 | rtnl_lock(); |
| 4862 | |
Thomas Graf | b382b19 | 2010-11-16 04:33:57 +0000 | [diff] [blame] | 4863 | __rtnl_af_unregister(&inet6_ops); |
| 4864 | |
Daniel Lezcano | 176c39a | 2009-03-03 01:06:45 -0800 | [diff] [blame] | 4865 | /* clean dev list */ |
| 4866 | for_each_netdev(&init_net, dev) { |
| 4867 | if (__in6_dev_get(dev) == NULL) |
| 4868 | continue; |
| 4869 | addrconf_ifdown(dev, 1); |
| 4870 | } |
| 4871 | addrconf_ifdown(init_net.loopback_dev, 2); |
| 4872 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4873 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4874 | * Check hash table. |
| 4875 | */ |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 4876 | spin_lock_bh(&addrconf_hash_lock); |
stephen hemminger | c2e2129 | 2010-03-17 20:31:10 +0000 | [diff] [blame] | 4877 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
| 4878 | WARN_ON(!hlist_empty(&inet6_addr_lst[i])); |
stephen hemminger | 5c578ae | 2010-03-17 20:31:11 +0000 | [diff] [blame] | 4879 | spin_unlock_bh(&addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4880 | |
| 4881 | del_timer(&addr_chk_timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4882 | rtnl_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4883 | } |