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> |
| 43 | #include <linux/socket.h> |
| 44 | #include <linux/sockios.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include <linux/net.h> |
| 46 | #include <linux/in6.h> |
| 47 | #include <linux/netdevice.h> |
Thomas Graf | 1823730 | 2006-08-04 23:04:54 -0700 | [diff] [blame] | 48 | #include <linux/if_addr.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | #include <linux/if_arp.h> |
| 50 | #include <linux/if_arcnet.h> |
| 51 | #include <linux/if_infiniband.h> |
| 52 | #include <linux/route.h> |
| 53 | #include <linux/inetdevice.h> |
| 54 | #include <linux/init.h> |
| 55 | #ifdef CONFIG_SYSCTL |
| 56 | #include <linux/sysctl.h> |
| 57 | #endif |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 58 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | #include <linux/delay.h> |
| 60 | #include <linux/notifier.h> |
Paulo Marques | 543537b | 2005-06-23 00:09:02 -0700 | [diff] [blame] | 61 | #include <linux/string.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 63 | #include <net/net_namespace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | #include <net/sock.h> |
| 65 | #include <net/snmp.h> |
| 66 | |
| 67 | #include <net/ipv6.h> |
| 68 | #include <net/protocol.h> |
| 69 | #include <net/ndisc.h> |
| 70 | #include <net/ip6_route.h> |
| 71 | #include <net/addrconf.h> |
| 72 | #include <net/tcp.h> |
| 73 | #include <net/ip.h> |
Thomas Graf | 5d62026 | 2006-08-15 00:35:02 -0700 | [diff] [blame] | 74 | #include <net/netlink.h> |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 75 | #include <net/pkt_sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | #include <linux/if_tunnel.h> |
| 77 | #include <linux/rtnetlink.h> |
| 78 | |
| 79 | #ifdef CONFIG_IPV6_PRIVACY |
| 80 | #include <linux/random.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | #endif |
| 82 | |
| 83 | #include <asm/uaccess.h> |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 84 | #include <asm/unaligned.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | |
| 86 | #include <linux/proc_fs.h> |
| 87 | #include <linux/seq_file.h> |
| 88 | |
| 89 | /* Set to 3 to get tracing... */ |
| 90 | #define ACONF_DEBUG 2 |
| 91 | |
| 92 | #if ACONF_DEBUG >= 3 |
| 93 | #define ADBG(x) printk x |
| 94 | #else |
| 95 | #define ADBG(x) |
| 96 | #endif |
| 97 | |
| 98 | #define INFINITY_LIFE_TIME 0xFFFFFFFF |
| 99 | #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b))) |
| 100 | |
| 101 | #ifdef CONFIG_SYSCTL |
Pavel Emelyanov | f52295a | 2007-12-02 00:58:37 +1100 | [diff] [blame] | 102 | static void addrconf_sysctl_register(struct inet6_dev *idev); |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 103 | static void addrconf_sysctl_unregister(struct inet6_dev *idev); |
| 104 | #else |
| 105 | static inline void addrconf_sysctl_register(struct inet6_dev *idev) |
| 106 | { |
| 107 | } |
| 108 | |
| 109 | static inline void addrconf_sysctl_unregister(struct inet6_dev *idev) |
| 110 | { |
| 111 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | #endif |
| 113 | |
| 114 | #ifdef CONFIG_IPV6_PRIVACY |
| 115 | static int __ipv6_regen_rndid(struct inet6_dev *idev); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 116 | 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] | 117 | static void ipv6_regen_rndid(unsigned long data); |
| 118 | |
| 119 | static int desync_factor = MAX_DESYNC_FACTOR * HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | #endif |
| 121 | |
| 122 | static int ipv6_count_addresses(struct inet6_dev *idev); |
| 123 | |
| 124 | /* |
| 125 | * Configured unicast address hash table |
| 126 | */ |
| 127 | static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE]; |
| 128 | static DEFINE_RWLOCK(addrconf_hash_lock); |
| 129 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | static void addrconf_verify(unsigned long); |
| 131 | |
Ingo Molnar | 8d06afa | 2005-09-09 13:10:40 -0700 | [diff] [blame] | 132 | static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | static DEFINE_SPINLOCK(addrconf_verify_lock); |
| 134 | |
| 135 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); |
| 136 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); |
| 137 | |
| 138 | static int addrconf_ifdown(struct net_device *dev, int how); |
| 139 | |
Jamal Hadi Salim | e431b8c | 2005-06-18 22:55:31 -0700 | [diff] [blame] | 140 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | static void addrconf_dad_timer(unsigned long data); |
| 142 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 143 | static void addrconf_dad_run(struct inet6_dev *idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | static void addrconf_rs_timer(unsigned long data); |
| 145 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); |
| 146 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); |
| 147 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 148 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | struct prefix_info *pinfo); |
Daniel Lezcano | 06bfe65 | 2008-01-10 22:43:42 -0800 | [diff] [blame] | 150 | static int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
| 151 | struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 153 | static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | |
Brian Haley | ab32ea5 | 2006-09-22 14:15:41 -0700 | [diff] [blame] | 155 | struct ipv6_devconf ipv6_devconf __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | .forwarding = 0, |
| 157 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, |
| 158 | .mtu6 = IPV6_MIN_MTU, |
| 159 | .accept_ra = 1, |
| 160 | .accept_redirects = 1, |
| 161 | .autoconf = 1, |
| 162 | .force_mld_version = 0, |
| 163 | .dad_transmits = 1, |
| 164 | .rtr_solicits = MAX_RTR_SOLICITATIONS, |
| 165 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, |
| 166 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, |
| 167 | #ifdef CONFIG_IPV6_PRIVACY |
| 168 | .use_tempaddr = 0, |
| 169 | .temp_valid_lft = TEMP_VALID_LIFETIME, |
| 170 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, |
| 171 | .regen_max_retry = REGEN_MAX_RETRY, |
| 172 | .max_desync_factor = MAX_DESYNC_FACTOR, |
| 173 | #endif |
| 174 | .max_addresses = IPV6_MAX_ADDRESSES, |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 175 | .accept_ra_defrtr = 1, |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 176 | .accept_ra_pinfo = 1, |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 177 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 178 | .accept_ra_rtr_pref = 1, |
YOSHIFUJI Hideaki | 52e1635 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 179 | .rtr_probe_interval = 60 * HZ, |
YOSHIFUJI Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 180 | #ifdef CONFIG_IPV6_ROUTE_INFO |
| 181 | .accept_ra_rt_info_max_plen = 0, |
| 182 | #endif |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 183 | #endif |
YOSHIFUJI Hideaki | fbea49e | 2006-09-22 14:43:49 -0700 | [diff] [blame] | 184 | .proxy_ndp = 0, |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 185 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | }; |
| 187 | |
Brian Haley | ab32ea5 | 2006-09-22 14:15:41 -0700 | [diff] [blame] | 188 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | .forwarding = 0, |
| 190 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, |
| 191 | .mtu6 = IPV6_MIN_MTU, |
| 192 | .accept_ra = 1, |
| 193 | .accept_redirects = 1, |
| 194 | .autoconf = 1, |
| 195 | .dad_transmits = 1, |
| 196 | .rtr_solicits = MAX_RTR_SOLICITATIONS, |
| 197 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, |
| 198 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, |
| 199 | #ifdef CONFIG_IPV6_PRIVACY |
| 200 | .use_tempaddr = 0, |
| 201 | .temp_valid_lft = TEMP_VALID_LIFETIME, |
| 202 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, |
| 203 | .regen_max_retry = REGEN_MAX_RETRY, |
| 204 | .max_desync_factor = MAX_DESYNC_FACTOR, |
| 205 | #endif |
| 206 | .max_addresses = IPV6_MAX_ADDRESSES, |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 207 | .accept_ra_defrtr = 1, |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 208 | .accept_ra_pinfo = 1, |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 209 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 210 | .accept_ra_rtr_pref = 1, |
YOSHIFUJI Hideaki | 52e1635 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 211 | .rtr_probe_interval = 60 * HZ, |
YOSHIFUJI Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 212 | #ifdef CONFIG_IPV6_ROUTE_INFO |
| 213 | .accept_ra_rt_info_max_plen = 0, |
| 214 | #endif |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 215 | #endif |
YOSHIFUJI Hideaki | fbea49e | 2006-09-22 14:43:49 -0700 | [diff] [blame] | 216 | .proxy_ndp = 0, |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 217 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | }; |
| 219 | |
| 220 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 223 | const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT; |
| 224 | const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 226 | /* Check if a valid qdisc is available */ |
| 227 | static inline int addrconf_qdisc_ok(struct net_device *dev) |
| 228 | { |
| 229 | return (dev->qdisc != &noop_qdisc); |
| 230 | } |
| 231 | |
YOSHIFUJI Hideaki | 2b5ead4 | 2008-05-13 01:16:24 +0900 | [diff] [blame] | 232 | /* Check if a route is valid prefix route */ |
| 233 | static inline int addrconf_is_prefix_route(const struct rt6_info *rt) |
| 234 | { |
| 235 | return ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0); |
| 236 | } |
| 237 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | static void addrconf_del_timer(struct inet6_ifaddr *ifp) |
| 239 | { |
| 240 | if (del_timer(&ifp->timer)) |
| 241 | __in6_ifa_put(ifp); |
| 242 | } |
| 243 | |
| 244 | enum addrconf_timer_t |
| 245 | { |
| 246 | AC_NONE, |
| 247 | AC_DAD, |
| 248 | AC_RS, |
| 249 | }; |
| 250 | |
| 251 | static void addrconf_mod_timer(struct inet6_ifaddr *ifp, |
| 252 | enum addrconf_timer_t what, |
| 253 | unsigned long when) |
| 254 | { |
| 255 | if (!del_timer(&ifp->timer)) |
| 256 | in6_ifa_hold(ifp); |
| 257 | |
| 258 | switch (what) { |
| 259 | case AC_DAD: |
| 260 | ifp->timer.function = addrconf_dad_timer; |
| 261 | break; |
| 262 | case AC_RS: |
| 263 | ifp->timer.function = addrconf_rs_timer; |
| 264 | break; |
| 265 | default:; |
| 266 | } |
| 267 | ifp->timer.expires = jiffies + when; |
| 268 | add_timer(&ifp->timer); |
| 269 | } |
| 270 | |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 271 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
| 272 | { |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 273 | if (snmp_mib_init((void **)idev->stats.ipv6, |
YOSHIFUJI Hideaki | c69bce2 | 2008-01-23 22:31:45 -0800 | [diff] [blame] | 274 | sizeof(struct ipstats_mib)) < 0) |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 275 | goto err_ip; |
| 276 | if (snmp_mib_init((void **)idev->stats.icmpv6, |
YOSHIFUJI Hideaki | c69bce2 | 2008-01-23 22:31:45 -0800 | [diff] [blame] | 277 | sizeof(struct icmpv6_mib)) < 0) |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 278 | goto err_icmp; |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 279 | if (snmp_mib_init((void **)idev->stats.icmpv6msg, |
YOSHIFUJI Hideaki | c69bce2 | 2008-01-23 22:31:45 -0800 | [diff] [blame] | 280 | sizeof(struct icmpv6msg_mib)) < 0) |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 281 | goto err_icmpmsg; |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 282 | |
| 283 | return 0; |
| 284 | |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 285 | err_icmpmsg: |
| 286 | snmp_mib_free((void **)idev->stats.icmpv6); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 287 | err_icmp: |
| 288 | snmp_mib_free((void **)idev->stats.ipv6); |
| 289 | err_ip: |
Pavel Emelyanov | aaf70ec | 2007-10-17 21:25:32 -0700 | [diff] [blame] | 290 | return -ENOMEM; |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 291 | } |
| 292 | |
Pavel Emelyanov | 16910b9 | 2007-10-17 21:23:43 -0700 | [diff] [blame] | 293 | static void snmp6_free_dev(struct inet6_dev *idev) |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 294 | { |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 295 | snmp_mib_free((void **)idev->stats.icmpv6msg); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 296 | snmp_mib_free((void **)idev->stats.icmpv6); |
| 297 | snmp_mib_free((void **)idev->stats.ipv6); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 298 | } |
| 299 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | /* Nobody refers to this device, we may destroy it. */ |
| 301 | |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 302 | static void in6_dev_finish_destroy_rcu(struct rcu_head *head) |
| 303 | { |
| 304 | struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu); |
| 305 | kfree(idev); |
| 306 | } |
| 307 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | void in6_dev_finish_destroy(struct inet6_dev *idev) |
| 309 | { |
| 310 | struct net_device *dev = idev->dev; |
| 311 | BUG_TRAP(idev->addr_list==NULL); |
| 312 | BUG_TRAP(idev->mc_list==NULL); |
| 313 | #ifdef NET_REFCNT_DEBUG |
| 314 | printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL"); |
| 315 | #endif |
| 316 | dev_put(dev); |
| 317 | if (!idev->dead) { |
| 318 | printk("Freeing alive inet6 device %p\n", idev); |
| 319 | return; |
| 320 | } |
| 321 | snmp6_free_dev(idev); |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 322 | call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | } |
| 324 | |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 325 | EXPORT_SYMBOL(in6_dev_finish_destroy); |
| 326 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | static struct inet6_dev * ipv6_add_dev(struct net_device *dev) |
| 328 | { |
| 329 | struct inet6_dev *ndev; |
| 330 | |
| 331 | ASSERT_RTNL(); |
| 332 | |
| 333 | if (dev->mtu < IPV6_MIN_MTU) |
| 334 | return NULL; |
| 335 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 336 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 338 | if (ndev == NULL) |
| 339 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 341 | rwlock_init(&ndev->lock); |
| 342 | ndev->dev = dev; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 343 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 344 | ndev->cnf.mtu6 = dev->mtu; |
| 345 | ndev->cnf.sysctl = NULL; |
| 346 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); |
| 347 | if (ndev->nd_parms == NULL) { |
| 348 | kfree(ndev); |
| 349 | return NULL; |
| 350 | } |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 351 | if (ndev->cnf.forwarding) |
| 352 | dev_disable_lro(dev); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 353 | /* We refer to the device */ |
| 354 | dev_hold(dev); |
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 | if (snmp6_alloc_dev(ndev) < 0) { |
| 357 | ADBG((KERN_WARNING |
| 358 | "%s(): cannot allocate memory for statistics; dev=%s.\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 359 | __func__, dev->name)); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 360 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
| 361 | ndev->dead = 1; |
| 362 | in6_dev_finish_destroy(ndev); |
| 363 | return NULL; |
| 364 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 366 | if (snmp6_register_dev(ndev) < 0) { |
| 367 | ADBG((KERN_WARNING |
| 368 | "%s(): cannot create /proc/net/dev_snmp6/%s\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 369 | __func__, dev->name)); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 370 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
| 371 | ndev->dead = 1; |
| 372 | in6_dev_finish_destroy(ndev); |
| 373 | return NULL; |
| 374 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 376 | /* One reference from device. We must do this before |
| 377 | * we invoke __ipv6_regen_rndid(). |
| 378 | */ |
| 379 | in6_dev_hold(ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | |
YOSHIFUJI Hideaki | b077d7a | 2008-04-13 23:42:18 -0700 | [diff] [blame] | 381 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
| 382 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { |
| 383 | printk(KERN_INFO |
| 384 | "%s: Disabled Multicast RS\n", |
| 385 | dev->name); |
| 386 | ndev->cnf.rtr_solicits = 0; |
| 387 | } |
| 388 | #endif |
| 389 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | #ifdef CONFIG_IPV6_PRIVACY |
Pavel Emelyanov | b24b8a2 | 2008-01-23 21:20:07 -0800 | [diff] [blame] | 391 | setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 392 | if ((dev->flags&IFF_LOOPBACK) || |
| 393 | dev->type == ARPHRD_TUNNEL || |
YOSHIFUJI Hideaki | 9625ed7 | 2008-04-13 23:47:11 -0700 | [diff] [blame] | 394 | dev->type == ARPHRD_TUNNEL6 || |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 395 | dev->type == ARPHRD_SIT || |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 396 | dev->type == ARPHRD_NONE) { |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 397 | printk(KERN_INFO |
| 398 | "%s: Disabled Privacy Extensions\n", |
| 399 | dev->name); |
| 400 | ndev->cnf.use_tempaddr = -1; |
| 401 | } else { |
| 402 | in6_dev_hold(ndev); |
| 403 | ipv6_regen_rndid((unsigned long) ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | } |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 405 | #endif |
| 406 | |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 407 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
Herbert Xu | 53aadcc | 2007-03-27 14:31:52 -0700 | [diff] [blame] | 408 | ndev->if_flags |= IF_READY; |
| 409 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 410 | ipv6_mc_init_dev(ndev); |
| 411 | ndev->tstamp = jiffies; |
Pavel Emelyanov | f52295a | 2007-12-02 00:58:37 +1100 | [diff] [blame] | 412 | addrconf_sysctl_register(ndev); |
David L Stevens | 30c4cf5 | 2007-01-04 12:31:14 -0800 | [diff] [blame] | 413 | /* protected by rtnl_lock */ |
| 414 | rcu_assign_pointer(dev->ip6_ptr, ndev); |
YOSHIFUJI Hideaki | d88ae4c | 2007-01-14 21:48:40 -0800 | [diff] [blame] | 415 | |
| 416 | /* Join all-node multicast group */ |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 417 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
YOSHIFUJI Hideaki | d88ae4c | 2007-01-14 21:48:40 -0800 | [diff] [blame] | 418 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | return ndev; |
| 420 | } |
| 421 | |
YOSHIFUJI Hideaki | cee8947 | 2008-04-13 23:21:16 -0700 | [diff] [blame] | 422 | static struct inet6_dev * ipv6_find_idev(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | { |
| 424 | struct inet6_dev *idev; |
| 425 | |
| 426 | ASSERT_RTNL(); |
| 427 | |
| 428 | if ((idev = __in6_dev_get(dev)) == NULL) { |
| 429 | if ((idev = ipv6_add_dev(dev)) == NULL) |
| 430 | return NULL; |
| 431 | } |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 432 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | if (dev->flags&IFF_UP) |
| 434 | ipv6_mc_up(idev); |
| 435 | return idev; |
| 436 | } |
| 437 | |
| 438 | #ifdef CONFIG_SYSCTL |
| 439 | static void dev_forward_change(struct inet6_dev *idev) |
| 440 | { |
| 441 | struct net_device *dev; |
| 442 | struct inet6_ifaddr *ifa; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | |
| 444 | if (!idev) |
| 445 | return; |
| 446 | dev = idev->dev; |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 447 | if (idev->cnf.forwarding) |
| 448 | dev_disable_lro(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | if (dev && (dev->flags & IFF_MULTICAST)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | if (idev->cnf.forwarding) |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 451 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | else |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 453 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | } |
| 455 | for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) { |
Michal Wrobel | 2c12a74 | 2007-02-26 15:36:10 -0800 | [diff] [blame] | 456 | if (ifa->flags&IFA_F_TENTATIVE) |
| 457 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | if (idev->cnf.forwarding) |
| 459 | addrconf_join_anycast(ifa); |
| 460 | else |
| 461 | addrconf_leave_anycast(ifa); |
| 462 | } |
| 463 | } |
| 464 | |
| 465 | |
Pavel Emelyanov | e186932 | 2008-01-10 17:43:50 -0800 | [diff] [blame] | 466 | static void addrconf_forward_change(struct net *net, __s32 newf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | { |
| 468 | struct net_device *dev; |
| 469 | struct inet6_dev *idev; |
| 470 | |
| 471 | read_lock(&dev_base_lock); |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 472 | for_each_netdev(net, dev) { |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 473 | rcu_read_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | idev = __in6_dev_get(dev); |
| 475 | if (idev) { |
Pavel Emelyanov | e186932 | 2008-01-10 17:43:50 -0800 | [diff] [blame] | 476 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
| 477 | idev->cnf.forwarding = newf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | if (changed) |
| 479 | dev_forward_change(idev); |
| 480 | } |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 481 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | } |
| 483 | read_unlock(&dev_base_lock); |
| 484 | } |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 485 | |
| 486 | static void addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old) |
| 487 | { |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 488 | struct net *net; |
| 489 | |
| 490 | net = (struct net *)table->extra2; |
Pavel Emelyanov | 441fc2a | 2008-01-10 17:43:22 -0800 | [diff] [blame] | 491 | if (p == &net->ipv6.devconf_dflt->forwarding) |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 492 | return; |
| 493 | |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 494 | rtnl_lock(); |
Pavel Emelyanov | e186932 | 2008-01-10 17:43:50 -0800 | [diff] [blame] | 495 | if (p == &net->ipv6.devconf_all->forwarding) { |
| 496 | __s32 newf = net->ipv6.devconf_all->forwarding; |
| 497 | net->ipv6.devconf_dflt->forwarding = newf; |
| 498 | addrconf_forward_change(net, newf); |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 499 | } else if ((!*p) ^ (!old)) |
| 500 | dev_forward_change((struct inet6_dev *)table->extra1); |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 501 | rtnl_unlock(); |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 502 | |
| 503 | if (*p) |
Daniel Lezcano | 7b4da53 | 2008-03-04 13:47:14 -0800 | [diff] [blame] | 504 | rt6_purge_dflt_routers(net); |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 505 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | #endif |
| 507 | |
| 508 | /* Nobody refers to this ifaddr, destroy it */ |
| 509 | |
| 510 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) |
| 511 | { |
| 512 | BUG_TRAP(ifp->if_next==NULL); |
| 513 | BUG_TRAP(ifp->lst_next==NULL); |
| 514 | #ifdef NET_REFCNT_DEBUG |
| 515 | printk(KERN_DEBUG "inet6_ifa_finish_destroy\n"); |
| 516 | #endif |
| 517 | |
| 518 | in6_dev_put(ifp->idev); |
| 519 | |
| 520 | if (del_timer(&ifp->timer)) |
| 521 | printk("Timer is still running, when freeing ifa=%p\n", ifp); |
| 522 | |
| 523 | if (!ifp->dead) { |
| 524 | printk("Freeing alive inet6 address %p\n", ifp); |
| 525 | return; |
| 526 | } |
| 527 | dst_release(&ifp->rt->u.dst); |
| 528 | |
| 529 | kfree(ifp); |
| 530 | } |
| 531 | |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 532 | static void |
| 533 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) |
| 534 | { |
| 535 | struct inet6_ifaddr *ifa, **ifap; |
YOSHIFUJI Hideaki | 8a6ce0c | 2006-07-11 13:05:30 -0700 | [diff] [blame] | 536 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 537 | |
| 538 | /* |
| 539 | * Each device address list is sorted in order of scope - |
| 540 | * global before linklocal. |
| 541 | */ |
| 542 | for (ifap = &idev->addr_list; (ifa = *ifap) != NULL; |
| 543 | ifap = &ifa->if_next) { |
YOSHIFUJI Hideaki | 8a6ce0c | 2006-07-11 13:05:30 -0700 | [diff] [blame] | 544 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 545 | break; |
| 546 | } |
| 547 | |
| 548 | ifp->if_next = *ifap; |
| 549 | *ifap = ifp; |
| 550 | } |
| 551 | |
YOSHIFUJI Hideaki | 3eb84f4 | 2008-04-10 15:42:08 +0900 | [diff] [blame] | 552 | /* |
| 553 | * Hash function taken from net_alias.c |
| 554 | */ |
| 555 | static u8 ipv6_addr_hash(const struct in6_addr *addr) |
| 556 | { |
| 557 | __u32 word; |
| 558 | |
| 559 | /* |
| 560 | * We perform the hash function over the last 64 bits of the address |
| 561 | * This will include the IEEE address token on links that support it. |
| 562 | */ |
| 563 | |
| 564 | word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]); |
| 565 | word ^= (word >> 16); |
| 566 | word ^= (word >> 8); |
| 567 | |
| 568 | return ((word ^ (word >> 4)) & 0x0f); |
| 569 | } |
| 570 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | /* On success it returns ifp with increased reference count */ |
| 572 | |
| 573 | static struct inet6_ifaddr * |
| 574 | 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] | 575 | int scope, u32 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | { |
| 577 | struct inet6_ifaddr *ifa = NULL; |
| 578 | struct rt6_info *rt; |
| 579 | int hash; |
| 580 | int err = 0; |
| 581 | |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 582 | rcu_read_lock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | if (idev->dead) { |
| 584 | err = -ENODEV; /*XXX*/ |
| 585 | goto out2; |
| 586 | } |
| 587 | |
| 588 | write_lock(&addrconf_hash_lock); |
| 589 | |
| 590 | /* Ignore adding duplicate addresses on an interface */ |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 591 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | ADBG(("ipv6_add_addr: already assigned\n")); |
| 593 | err = -EEXIST; |
| 594 | goto out; |
| 595 | } |
| 596 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 597 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | |
| 599 | if (ifa == NULL) { |
| 600 | ADBG(("ipv6_add_addr: malloc failed\n")); |
| 601 | err = -ENOBUFS; |
| 602 | goto out; |
| 603 | } |
| 604 | |
| 605 | rt = addrconf_dst_alloc(idev, addr, 0); |
| 606 | if (IS_ERR(rt)) { |
| 607 | err = PTR_ERR(rt); |
| 608 | goto out; |
| 609 | } |
| 610 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | ipv6_addr_copy(&ifa->addr, addr); |
| 612 | |
| 613 | spin_lock_init(&ifa->lock); |
| 614 | init_timer(&ifa->timer); |
| 615 | ifa->timer.data = (unsigned long) ifa; |
| 616 | ifa->scope = scope; |
| 617 | ifa->prefix_len = pfxlen; |
| 618 | ifa->flags = flags | IFA_F_TENTATIVE; |
| 619 | ifa->cstamp = ifa->tstamp = jiffies; |
| 620 | |
Keir Fraser | 57f5f54 | 2006-08-29 02:43:49 -0700 | [diff] [blame] | 621 | ifa->rt = rt; |
| 622 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 623 | /* |
| 624 | * part one of RFC 4429, section 3.3 |
| 625 | * We should not configure an address as |
| 626 | * optimistic if we do not yet know the link |
| 627 | * layer address of our nexhop router |
| 628 | */ |
| 629 | |
| 630 | if (rt->rt6i_nexthop == NULL) |
| 631 | ifa->flags &= ~IFA_F_OPTIMISTIC; |
| 632 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | ifa->idev = idev; |
| 634 | in6_dev_hold(idev); |
| 635 | /* For caller */ |
| 636 | in6_ifa_hold(ifa); |
| 637 | |
| 638 | /* Add to big hash table */ |
| 639 | hash = ipv6_addr_hash(addr); |
| 640 | |
| 641 | ifa->lst_next = inet6_addr_lst[hash]; |
| 642 | inet6_addr_lst[hash] = ifa; |
| 643 | in6_ifa_hold(ifa); |
| 644 | write_unlock(&addrconf_hash_lock); |
| 645 | |
| 646 | write_lock(&idev->lock); |
| 647 | /* Add to inet6_dev unicast addr list. */ |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 648 | ipv6_link_dev_addr(idev, ifa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | |
| 650 | #ifdef CONFIG_IPV6_PRIVACY |
| 651 | if (ifa->flags&IFA_F_TEMPORARY) { |
| 652 | ifa->tmp_next = idev->tempaddr_list; |
| 653 | idev->tempaddr_list = ifa; |
| 654 | in6_ifa_hold(ifa); |
| 655 | } |
| 656 | #endif |
| 657 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | in6_ifa_hold(ifa); |
| 659 | write_unlock(&idev->lock); |
| 660 | out2: |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 661 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | |
YOSHIFUJI Hideaki | fd92833 | 2005-04-19 22:27:09 -0700 | [diff] [blame] | 663 | if (likely(err == 0)) |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 664 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | else { |
| 666 | kfree(ifa); |
| 667 | ifa = ERR_PTR(err); |
| 668 | } |
| 669 | |
| 670 | return ifa; |
| 671 | out: |
| 672 | write_unlock(&addrconf_hash_lock); |
| 673 | goto out2; |
| 674 | } |
| 675 | |
| 676 | /* This function wants to get referenced ifp and releases it before return */ |
| 677 | |
| 678 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) |
| 679 | { |
| 680 | struct inet6_ifaddr *ifa, **ifap; |
| 681 | struct inet6_dev *idev = ifp->idev; |
| 682 | int hash; |
| 683 | int deleted = 0, onlink = 0; |
| 684 | unsigned long expires = jiffies; |
| 685 | |
| 686 | hash = ipv6_addr_hash(&ifp->addr); |
| 687 | |
| 688 | ifp->dead = 1; |
| 689 | |
| 690 | write_lock_bh(&addrconf_hash_lock); |
| 691 | for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL; |
| 692 | ifap = &ifa->lst_next) { |
| 693 | if (ifa == ifp) { |
| 694 | *ifap = ifa->lst_next; |
| 695 | __in6_ifa_put(ifp); |
| 696 | ifa->lst_next = NULL; |
| 697 | break; |
| 698 | } |
| 699 | } |
| 700 | write_unlock_bh(&addrconf_hash_lock); |
| 701 | |
| 702 | write_lock_bh(&idev->lock); |
| 703 | #ifdef CONFIG_IPV6_PRIVACY |
| 704 | if (ifp->flags&IFA_F_TEMPORARY) { |
| 705 | for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL; |
| 706 | ifap = &ifa->tmp_next) { |
| 707 | if (ifa == ifp) { |
| 708 | *ifap = ifa->tmp_next; |
| 709 | if (ifp->ifpub) { |
| 710 | in6_ifa_put(ifp->ifpub); |
| 711 | ifp->ifpub = NULL; |
| 712 | } |
| 713 | __in6_ifa_put(ifp); |
| 714 | ifa->tmp_next = NULL; |
| 715 | break; |
| 716 | } |
| 717 | } |
| 718 | } |
| 719 | #endif |
| 720 | |
Kristian Slavov | 1d14280 | 2005-12-21 18:47:24 -0800 | [diff] [blame] | 721 | for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | if (ifa == ifp) { |
| 723 | *ifap = ifa->if_next; |
| 724 | __in6_ifa_put(ifp); |
| 725 | ifa->if_next = NULL; |
| 726 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) |
| 727 | break; |
| 728 | deleted = 1; |
Kristian Slavov | 1d14280 | 2005-12-21 18:47:24 -0800 | [diff] [blame] | 729 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | } else if (ifp->flags & IFA_F_PERMANENT) { |
| 731 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, |
| 732 | ifp->prefix_len)) { |
| 733 | if (ifa->flags & IFA_F_PERMANENT) { |
| 734 | onlink = 1; |
| 735 | if (deleted) |
| 736 | break; |
| 737 | } else { |
| 738 | unsigned long lifetime; |
| 739 | |
| 740 | if (!onlink) |
| 741 | onlink = -1; |
| 742 | |
| 743 | spin_lock(&ifa->lock); |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 744 | |
| 745 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); |
| 746 | /* |
| 747 | * Note: Because this address is |
| 748 | * not permanent, lifetime < |
| 749 | * LONG_MAX / HZ here. |
| 750 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | if (time_before(expires, |
| 752 | ifa->tstamp + lifetime * HZ)) |
| 753 | expires = ifa->tstamp + lifetime * HZ; |
| 754 | spin_unlock(&ifa->lock); |
| 755 | } |
| 756 | } |
| 757 | } |
Kristian Slavov | 1d14280 | 2005-12-21 18:47:24 -0800 | [diff] [blame] | 758 | ifap = &ifa->if_next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | } |
| 760 | write_unlock_bh(&idev->lock); |
| 761 | |
| 762 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
| 763 | |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 764 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | |
| 766 | addrconf_del_timer(ifp); |
| 767 | |
| 768 | /* |
| 769 | * Purge or update corresponding prefix |
| 770 | * |
| 771 | * 1) we don't purge prefix here if address was not permanent. |
| 772 | * prefix is managed by its own lifetime. |
| 773 | * 2) if there're no addresses, delete prefix. |
| 774 | * 3) if there're still other permanent address(es), |
| 775 | * corresponding prefix is still permanent. |
| 776 | * 4) otherwise, update prefix lifetime to the |
| 777 | * longest valid lifetime among the corresponding |
| 778 | * addresses on the device. |
| 779 | * Note: subsequent RA will update lifetime. |
| 780 | * |
| 781 | * --yoshfuji |
| 782 | */ |
| 783 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { |
| 784 | struct in6_addr prefix; |
| 785 | struct rt6_info *rt; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 786 | struct net *net = dev_net(ifp->idev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 788 | rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | |
YOSHIFUJI Hideaki | 2b5ead4 | 2008-05-13 01:16:24 +0900 | [diff] [blame] | 790 | if (rt && addrconf_is_prefix_route(rt)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | if (onlink == 0) { |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 792 | ip6_del_rt(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | rt = NULL; |
| 794 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { |
| 795 | rt->rt6i_expires = expires; |
| 796 | rt->rt6i_flags |= RTF_EXPIRES; |
| 797 | } |
| 798 | } |
| 799 | dst_release(&rt->u.dst); |
| 800 | } |
| 801 | |
| 802 | in6_ifa_put(ifp); |
| 803 | } |
| 804 | |
| 805 | #ifdef CONFIG_IPV6_PRIVACY |
| 806 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) |
| 807 | { |
| 808 | struct inet6_dev *idev = ifp->idev; |
| 809 | struct in6_addr addr, *tmpaddr; |
| 810 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp; |
Benoit Boissinot | eac55bf | 2008-04-02 00:01:35 -0700 | [diff] [blame] | 811 | unsigned long regen_advance; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | int tmp_plen; |
| 813 | int ret = 0; |
| 814 | int max_addresses; |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 815 | u32 addr_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | |
| 817 | write_lock(&idev->lock); |
| 818 | if (ift) { |
| 819 | spin_lock_bh(&ift->lock); |
| 820 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); |
| 821 | spin_unlock_bh(&ift->lock); |
| 822 | tmpaddr = &addr; |
| 823 | } else { |
| 824 | tmpaddr = NULL; |
| 825 | } |
| 826 | retry: |
| 827 | in6_dev_hold(idev); |
| 828 | if (idev->cnf.use_tempaddr <= 0) { |
| 829 | write_unlock(&idev->lock); |
| 830 | printk(KERN_INFO |
| 831 | "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); |
| 832 | in6_dev_put(idev); |
| 833 | ret = -1; |
| 834 | goto out; |
| 835 | } |
| 836 | spin_lock_bh(&ifp->lock); |
| 837 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { |
| 838 | idev->cnf.use_tempaddr = -1; /*XXX*/ |
| 839 | spin_unlock_bh(&ifp->lock); |
| 840 | write_unlock(&idev->lock); |
| 841 | printk(KERN_WARNING |
| 842 | "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); |
| 843 | in6_dev_put(idev); |
| 844 | ret = -1; |
| 845 | goto out; |
| 846 | } |
| 847 | in6_ifa_hold(ifp); |
| 848 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); |
| 849 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { |
| 850 | spin_unlock_bh(&ifp->lock); |
| 851 | write_unlock(&idev->lock); |
| 852 | printk(KERN_WARNING |
| 853 | "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); |
| 854 | in6_ifa_put(ifp); |
| 855 | in6_dev_put(idev); |
| 856 | ret = -1; |
| 857 | goto out; |
| 858 | } |
| 859 | memcpy(&addr.s6_addr[8], idev->rndid, 8); |
| 860 | tmp_valid_lft = min_t(__u32, |
| 861 | ifp->valid_lft, |
| 862 | idev->cnf.temp_valid_lft); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 863 | tmp_prefered_lft = min_t(__u32, |
| 864 | ifp->prefered_lft, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | idev->cnf.temp_prefered_lft - desync_factor / HZ); |
| 866 | tmp_plen = ifp->prefix_len; |
| 867 | max_addresses = idev->cnf.max_addresses; |
| 868 | tmp_cstamp = ifp->cstamp; |
| 869 | tmp_tstamp = ifp->tstamp; |
| 870 | spin_unlock_bh(&ifp->lock); |
| 871 | |
Benoit Boissinot | eac55bf | 2008-04-02 00:01:35 -0700 | [diff] [blame] | 872 | regen_advance = idev->cnf.regen_max_retry * |
| 873 | idev->cnf.dad_transmits * |
| 874 | idev->nd_parms->retrans_time / HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | write_unlock(&idev->lock); |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 876 | |
Benoit Boissinot | eac55bf | 2008-04-02 00:01:35 -0700 | [diff] [blame] | 877 | /* A temporary address is created only if this calculated Preferred |
| 878 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, |
| 879 | * an implementation must not create a temporary address with a zero |
| 880 | * Preferred Lifetime. |
| 881 | */ |
| 882 | if (tmp_prefered_lft <= regen_advance) { |
| 883 | in6_ifa_put(ifp); |
| 884 | in6_dev_put(idev); |
| 885 | ret = -1; |
| 886 | goto out; |
| 887 | } |
| 888 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 889 | addr_flags = IFA_F_TEMPORARY; |
| 890 | /* set in addrconf_prefix_rcv() */ |
| 891 | if (ifp->flags & IFA_F_OPTIMISTIC) |
| 892 | addr_flags |= IFA_F_OPTIMISTIC; |
| 893 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | ift = !max_addresses || |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 895 | ipv6_count_addresses(idev) < max_addresses ? |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | ipv6_add_addr(idev, &addr, tmp_plen, |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 897 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, |
| 898 | addr_flags) : NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | if (!ift || IS_ERR(ift)) { |
| 900 | in6_ifa_put(ifp); |
| 901 | in6_dev_put(idev); |
| 902 | printk(KERN_INFO |
| 903 | "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); |
| 904 | tmpaddr = &addr; |
| 905 | write_lock(&idev->lock); |
| 906 | goto retry; |
| 907 | } |
| 908 | |
| 909 | spin_lock_bh(&ift->lock); |
| 910 | ift->ifpub = ifp; |
| 911 | ift->valid_lft = tmp_valid_lft; |
| 912 | ift->prefered_lft = tmp_prefered_lft; |
| 913 | ift->cstamp = tmp_cstamp; |
| 914 | ift->tstamp = tmp_tstamp; |
| 915 | spin_unlock_bh(&ift->lock); |
| 916 | |
| 917 | addrconf_dad_start(ift, 0); |
| 918 | in6_ifa_put(ift); |
| 919 | in6_dev_put(idev); |
| 920 | out: |
| 921 | return ret; |
| 922 | } |
| 923 | #endif |
| 924 | |
| 925 | /* |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 926 | * Choose an appropriate source address (RFC3484) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | */ |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 928 | enum { |
| 929 | IPV6_SADDR_RULE_INIT = 0, |
| 930 | IPV6_SADDR_RULE_LOCAL, |
| 931 | IPV6_SADDR_RULE_SCOPE, |
| 932 | IPV6_SADDR_RULE_PREFERRED, |
| 933 | #ifdef CONFIG_IPV6_MIP6 |
| 934 | IPV6_SADDR_RULE_HOA, |
| 935 | #endif |
| 936 | IPV6_SADDR_RULE_OIF, |
| 937 | IPV6_SADDR_RULE_LABEL, |
| 938 | #ifdef CONFIG_IPV6_PRIVACY |
| 939 | IPV6_SADDR_RULE_PRIVACY, |
| 940 | #endif |
| 941 | IPV6_SADDR_RULE_ORCHID, |
| 942 | IPV6_SADDR_RULE_PREFIX, |
| 943 | IPV6_SADDR_RULE_MAX |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 944 | }; |
| 945 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 946 | struct ipv6_saddr_score { |
| 947 | int rule; |
| 948 | int addr_type; |
| 949 | struct inet6_ifaddr *ifa; |
| 950 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); |
| 951 | int scopedist; |
| 952 | int matchlen; |
| 953 | }; |
| 954 | |
| 955 | struct ipv6_saddr_dst { |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 956 | const struct in6_addr *addr; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 957 | int ifindex; |
| 958 | int scope; |
| 959 | int label; |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 960 | unsigned int prefs; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 961 | }; |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 962 | |
Dave Jones | b6f99a2 | 2007-03-22 12:27:49 -0700 | [diff] [blame] | 963 | static inline int ipv6_saddr_preferred(int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | { |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 965 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4| |
| 966 | IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED)) |
| 967 | return 1; |
| 968 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 969 | } |
| 970 | |
Benjamin Thery | 3de2325 | 2008-05-28 14:51:24 +0200 | [diff] [blame] | 971 | static int ipv6_get_saddr_eval(struct net *net, |
| 972 | struct ipv6_saddr_score *score, |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 973 | struct ipv6_saddr_dst *dst, |
| 974 | int i) |
| 975 | { |
| 976 | int ret; |
| 977 | |
| 978 | if (i <= score->rule) { |
| 979 | switch (i) { |
| 980 | case IPV6_SADDR_RULE_SCOPE: |
| 981 | ret = score->scopedist; |
| 982 | break; |
| 983 | case IPV6_SADDR_RULE_PREFIX: |
| 984 | ret = score->matchlen; |
| 985 | break; |
| 986 | default: |
| 987 | ret = !!test_bit(i, score->scorebits); |
| 988 | } |
| 989 | goto out; |
| 990 | } |
| 991 | |
| 992 | switch (i) { |
| 993 | case IPV6_SADDR_RULE_INIT: |
| 994 | /* Rule 0: remember if hiscore is not ready yet */ |
| 995 | ret = !!score->ifa; |
| 996 | break; |
| 997 | case IPV6_SADDR_RULE_LOCAL: |
| 998 | /* Rule 1: Prefer same address */ |
| 999 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); |
| 1000 | break; |
| 1001 | case IPV6_SADDR_RULE_SCOPE: |
| 1002 | /* Rule 2: Prefer appropriate scope |
| 1003 | * |
| 1004 | * ret |
| 1005 | * ^ |
| 1006 | * -1 | d 15 |
| 1007 | * ---+--+-+---> scope |
| 1008 | * | |
| 1009 | * | d is scope of the destination. |
| 1010 | * B-d | \ |
| 1011 | * | \ <- smaller scope is better if |
| 1012 | * B-15 | \ if scope is enough for destinaion. |
| 1013 | * | ret = B - scope (-1 <= scope >= d <= 15). |
| 1014 | * d-C-1 | / |
| 1015 | * |/ <- greater is better |
| 1016 | * -C / if scope is not enough for destination. |
| 1017 | * /| ret = scope - C (-1 <= d < scope <= 15). |
| 1018 | * |
| 1019 | * d - C - 1 < B -15 (for all -1 <= d <= 15). |
| 1020 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. |
| 1021 | * Assume B = 0 and we get C > 29. |
| 1022 | */ |
| 1023 | ret = __ipv6_addr_src_scope(score->addr_type); |
| 1024 | if (ret >= dst->scope) |
| 1025 | ret = -ret; |
| 1026 | else |
| 1027 | ret -= 128; /* 30 is enough */ |
| 1028 | score->scopedist = ret; |
| 1029 | break; |
| 1030 | case IPV6_SADDR_RULE_PREFERRED: |
| 1031 | /* Rule 3: Avoid deprecated and optimistic addresses */ |
| 1032 | ret = ipv6_saddr_preferred(score->addr_type) || |
| 1033 | !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)); |
| 1034 | break; |
| 1035 | #ifdef CONFIG_IPV6_MIP6 |
| 1036 | case IPV6_SADDR_RULE_HOA: |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1037 | { |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1038 | /* Rule 4: Prefer home address */ |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1039 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
| 1040 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1041 | break; |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1042 | } |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1043 | #endif |
| 1044 | case IPV6_SADDR_RULE_OIF: |
| 1045 | /* Rule 5: Prefer outgoing interface */ |
| 1046 | ret = (!dst->ifindex || |
| 1047 | dst->ifindex == score->ifa->idev->dev->ifindex); |
| 1048 | break; |
| 1049 | case IPV6_SADDR_RULE_LABEL: |
| 1050 | /* Rule 6: Prefer matching label */ |
Benjamin Thery | 3de2325 | 2008-05-28 14:51:24 +0200 | [diff] [blame] | 1051 | ret = ipv6_addr_label(net, |
| 1052 | &score->ifa->addr, score->addr_type, |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1053 | score->ifa->idev->dev->ifindex) == dst->label; |
| 1054 | break; |
| 1055 | #ifdef CONFIG_IPV6_PRIVACY |
| 1056 | case IPV6_SADDR_RULE_PRIVACY: |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1057 | { |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1058 | /* Rule 7: Prefer public address |
| 1059 | * Note: prefer temprary address if use_tempaddr >= 2 |
| 1060 | */ |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1061 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
| 1062 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : |
| 1063 | score->ifa->idev->cnf.use_tempaddr >= 2; |
| 1064 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1065 | break; |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1066 | } |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1067 | #endif |
| 1068 | case IPV6_SADDR_RULE_ORCHID: |
| 1069 | /* Rule 8-: Prefer ORCHID vs ORCHID or |
| 1070 | * non-ORCHID vs non-ORCHID |
| 1071 | */ |
| 1072 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ |
| 1073 | ipv6_addr_orchid(dst->addr)); |
| 1074 | break; |
| 1075 | case IPV6_SADDR_RULE_PREFIX: |
| 1076 | /* Rule 8: Use longest matching prefix */ |
| 1077 | score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr, |
| 1078 | dst->addr); |
| 1079 | break; |
| 1080 | default: |
| 1081 | ret = 0; |
| 1082 | } |
| 1083 | |
| 1084 | if (ret) |
| 1085 | __set_bit(i, score->scorebits); |
| 1086 | score->rule = i; |
| 1087 | out: |
| 1088 | return ret; |
| 1089 | } |
| 1090 | |
| 1091 | int ipv6_dev_get_saddr(struct net_device *dst_dev, |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 1092 | const struct in6_addr *daddr, unsigned int prefs, |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1093 | struct in6_addr *saddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | { |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1095 | struct ipv6_saddr_score scores[2], |
| 1096 | *score = &scores[0], *hiscore = &scores[1]; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1097 | struct net *net = dev_net(dst_dev); |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1098 | struct ipv6_saddr_dst dst; |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1099 | struct net_device *dev; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1100 | int dst_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1102 | dst_type = __ipv6_addr_type(daddr); |
| 1103 | dst.addr = daddr; |
| 1104 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; |
| 1105 | dst.scope = __ipv6_addr_src_scope(dst_type); |
Benjamin Thery | 3de2325 | 2008-05-28 14:51:24 +0200 | [diff] [blame] | 1106 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1107 | dst.prefs = prefs; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1108 | |
| 1109 | hiscore->rule = -1; |
| 1110 | hiscore->ifa = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | |
| 1112 | read_lock(&dev_base_lock); |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1113 | rcu_read_lock(); |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1114 | |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 1115 | for_each_netdev(net, dev) { |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1116 | struct inet6_dev *idev; |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1117 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1118 | /* Candidate Source Address (section 4) |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1119 | * - multicast and link-local destination address, |
| 1120 | * the set of candidate source address MUST only |
| 1121 | * include addresses assigned to interfaces |
| 1122 | * belonging to the same link as the outgoing |
| 1123 | * interface. |
| 1124 | * (- For site-local destination addresses, the |
| 1125 | * set of candidate source addresses MUST only |
| 1126 | * include addresses assigned to interfaces |
| 1127 | * belonging to the same site as the outgoing |
| 1128 | * interface.) |
| 1129 | */ |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1130 | if (((dst_type & IPV6_ADDR_MULTICAST) || |
| 1131 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && |
| 1132 | dst.ifindex && dev->ifindex != dst.ifindex) |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1133 | continue; |
| 1134 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | idev = __in6_dev_get(dev); |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1136 | if (!idev) |
| 1137 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1139 | read_lock_bh(&idev->lock); |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1140 | for (score->ifa = idev->addr_list; score->ifa; score->ifa = score->ifa->if_next) { |
| 1141 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1143 | /* |
YOSHIFUJI Hideaki | 6b3ae80 | 2005-12-21 22:58:01 +0900 | [diff] [blame] | 1144 | * - Tentative Address (RFC2462 section 5.4) |
| 1145 | * - A tentative address is not considered |
| 1146 | * "assigned to an interface" in the traditional |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1147 | * sense, unless it is also flagged as optimistic. |
YOSHIFUJI Hideaki | 6b3ae80 | 2005-12-21 22:58:01 +0900 | [diff] [blame] | 1148 | * - Candidate Source Address (section 4) |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1149 | * - In any case, anycast addresses, multicast |
| 1150 | * addresses, and the unspecified address MUST |
| 1151 | * NOT be included in a candidate set. |
| 1152 | */ |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1153 | if ((score->ifa->flags & IFA_F_TENTATIVE) && |
| 1154 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) |
YOSHIFUJI Hideaki | 6b3ae80 | 2005-12-21 22:58:01 +0900 | [diff] [blame] | 1155 | continue; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1156 | |
| 1157 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); |
| 1158 | |
| 1159 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || |
| 1160 | score->addr_type & IPV6_ADDR_MULTICAST)) { |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1161 | LIMIT_NETDEBUG(KERN_DEBUG |
Joe Perches | 3b6d821c | 2007-11-19 23:47:25 -0800 | [diff] [blame] | 1162 | "ADDRCONF: unspecified / multicast address " |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1163 | "assigned as unicast address on %s", |
| 1164 | dev->name); |
| 1165 | continue; |
| 1166 | } |
| 1167 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1168 | score->rule = -1; |
| 1169 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1170 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1171 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { |
| 1172 | int minihiscore, miniscore; |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1173 | |
Benjamin Thery | 3de2325 | 2008-05-28 14:51:24 +0200 | [diff] [blame] | 1174 | minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i); |
| 1175 | miniscore = ipv6_get_saddr_eval(net, score, &dst, i); |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1176 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1177 | if (minihiscore > miniscore) { |
| 1178 | if (i == IPV6_SADDR_RULE_SCOPE && |
| 1179 | score->scopedist > 0) { |
| 1180 | /* |
| 1181 | * special case: |
| 1182 | * each remaining entry |
| 1183 | * has too small (not enough) |
| 1184 | * scope, because ifa entries |
| 1185 | * are sorted by their scope |
| 1186 | * values. |
| 1187 | */ |
| 1188 | goto try_nextdev; |
| 1189 | } |
| 1190 | break; |
| 1191 | } else if (minihiscore < miniscore) { |
| 1192 | struct ipv6_saddr_score *tmp; |
| 1193 | |
| 1194 | if (hiscore->ifa) |
| 1195 | in6_ifa_put(hiscore->ifa); |
| 1196 | |
| 1197 | in6_ifa_hold(score->ifa); |
| 1198 | |
| 1199 | tmp = hiscore; |
| 1200 | hiscore = score; |
| 1201 | score = tmp; |
| 1202 | |
| 1203 | /* restore our iterator */ |
| 1204 | score->ifa = hiscore->ifa; |
| 1205 | |
| 1206 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1207 | } |
| 1208 | } |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1209 | } |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1210 | try_nextdev: |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1211 | read_unlock_bh(&idev->lock); |
| 1212 | } |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1213 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1214 | read_unlock(&dev_base_lock); |
| 1215 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1216 | if (!hiscore->ifa) |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1217 | return -EADDRNOTAVAIL; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1218 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1219 | ipv6_addr_copy(saddr, &hiscore->ifa->addr); |
| 1220 | in6_ifa_put(hiscore->ifa); |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1221 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | } |
| 1223 | |
YOSHIFUJI Hideaki | 5e5f3f0 | 2008-03-03 21:44:34 +0900 | [diff] [blame] | 1224 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1226 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
| 1227 | unsigned char banned_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1228 | { |
| 1229 | struct inet6_dev *idev; |
| 1230 | int err = -EADDRNOTAVAIL; |
| 1231 | |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1232 | rcu_read_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | if ((idev = __in6_dev_get(dev)) != NULL) { |
| 1234 | struct inet6_ifaddr *ifp; |
| 1235 | |
| 1236 | read_lock_bh(&idev->lock); |
| 1237 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1238 | if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | ipv6_addr_copy(addr, &ifp->addr); |
| 1240 | err = 0; |
| 1241 | break; |
| 1242 | } |
| 1243 | } |
| 1244 | read_unlock_bh(&idev->lock); |
| 1245 | } |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1246 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | return err; |
| 1248 | } |
| 1249 | |
| 1250 | static int ipv6_count_addresses(struct inet6_dev *idev) |
| 1251 | { |
| 1252 | int cnt = 0; |
| 1253 | struct inet6_ifaddr *ifp; |
| 1254 | |
| 1255 | read_lock_bh(&idev->lock); |
| 1256 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) |
| 1257 | cnt++; |
| 1258 | read_unlock_bh(&idev->lock); |
| 1259 | return cnt; |
| 1260 | } |
| 1261 | |
Daniel Lezcano | bfeade0 | 2008-01-10 22:43:18 -0800 | [diff] [blame] | 1262 | int ipv6_chk_addr(struct net *net, struct in6_addr *addr, |
| 1263 | struct net_device *dev, int strict) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | { |
| 1265 | struct inet6_ifaddr * ifp; |
| 1266 | u8 hash = ipv6_addr_hash(addr); |
| 1267 | |
| 1268 | read_lock_bh(&addrconf_hash_lock); |
| 1269 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 1270 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
Daniel Lezcano | bfeade0 | 2008-01-10 22:43:18 -0800 | [diff] [blame] | 1271 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | if (ipv6_addr_equal(&ifp->addr, addr) && |
| 1273 | !(ifp->flags&IFA_F_TENTATIVE)) { |
| 1274 | if (dev == NULL || ifp->idev->dev == dev || |
| 1275 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) |
| 1276 | break; |
| 1277 | } |
| 1278 | } |
| 1279 | read_unlock_bh(&addrconf_hash_lock); |
| 1280 | return ifp != NULL; |
| 1281 | } |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 1282 | EXPORT_SYMBOL(ipv6_chk_addr); |
| 1283 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | static |
Daniel Lezcano | 06bfe65 | 2008-01-10 22:43:42 -0800 | [diff] [blame] | 1285 | int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
| 1286 | struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | { |
| 1288 | struct inet6_ifaddr * ifp; |
| 1289 | u8 hash = ipv6_addr_hash(addr); |
| 1290 | |
| 1291 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 1292 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
Daniel Lezcano | 06bfe65 | 2008-01-10 22:43:42 -0800 | [diff] [blame] | 1293 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1294 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
| 1295 | if (dev == NULL || ifp->idev->dev == dev) |
| 1296 | break; |
| 1297 | } |
| 1298 | } |
| 1299 | return ifp != NULL; |
| 1300 | } |
| 1301 | |
YOSHIFUJI Hideaki | 52eeeb8 | 2008-03-15 22:54:23 -0400 | [diff] [blame] | 1302 | int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev) |
| 1303 | { |
| 1304 | struct inet6_dev *idev; |
| 1305 | struct inet6_ifaddr *ifa; |
| 1306 | int onlink; |
| 1307 | |
| 1308 | onlink = 0; |
| 1309 | rcu_read_lock(); |
| 1310 | idev = __in6_dev_get(dev); |
| 1311 | if (idev) { |
| 1312 | read_lock_bh(&idev->lock); |
| 1313 | for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) { |
| 1314 | onlink = ipv6_prefix_equal(addr, &ifa->addr, |
| 1315 | ifa->prefix_len); |
| 1316 | if (onlink) |
| 1317 | break; |
| 1318 | } |
| 1319 | read_unlock_bh(&idev->lock); |
| 1320 | } |
| 1321 | rcu_read_unlock(); |
| 1322 | return onlink; |
| 1323 | } |
| 1324 | |
| 1325 | EXPORT_SYMBOL(ipv6_chk_prefix); |
| 1326 | |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 1327 | 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] | 1328 | struct net_device *dev, int strict) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | { |
| 1330 | struct inet6_ifaddr * ifp; |
| 1331 | u8 hash = ipv6_addr_hash(addr); |
| 1332 | |
| 1333 | read_lock_bh(&addrconf_hash_lock); |
| 1334 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 1335 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
Daniel Lezcano | 1cab3da | 2008-01-10 22:44:09 -0800 | [diff] [blame] | 1336 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1337 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
| 1338 | if (dev == NULL || ifp->idev->dev == dev || |
| 1339 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { |
| 1340 | in6_ifa_hold(ifp); |
| 1341 | break; |
| 1342 | } |
| 1343 | } |
| 1344 | } |
| 1345 | read_unlock_bh(&addrconf_hash_lock); |
| 1346 | |
| 1347 | return ifp; |
| 1348 | } |
| 1349 | |
| 1350 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) |
| 1351 | { |
| 1352 | const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; |
Arnaldo Carvalho de Melo | 0fa1a53 | 2005-12-13 23:23:09 -0800 | [diff] [blame] | 1353 | const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); |
Al Viro | 8210323 | 2006-09-27 18:44:10 -0700 | [diff] [blame] | 1354 | __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr; |
| 1355 | __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | int sk_ipv6only = ipv6_only_sock(sk); |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 1357 | int sk2_ipv6only = inet_v6_ipv6only(sk2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | int addr_type = ipv6_addr_type(sk_rcv_saddr6); |
| 1359 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; |
| 1360 | |
| 1361 | if (!sk2_rcv_saddr && !sk_ipv6only) |
| 1362 | return 1; |
| 1363 | |
| 1364 | if (addr_type2 == IPV6_ADDR_ANY && |
| 1365 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) |
| 1366 | return 1; |
| 1367 | |
| 1368 | if (addr_type == IPV6_ADDR_ANY && |
| 1369 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) |
| 1370 | return 1; |
| 1371 | |
| 1372 | if (sk2_rcv_saddr6 && |
| 1373 | ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) |
| 1374 | return 1; |
| 1375 | |
| 1376 | if (addr_type == IPV6_ADDR_MAPPED && |
| 1377 | !sk2_ipv6only && |
| 1378 | (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr)) |
| 1379 | return 1; |
| 1380 | |
| 1381 | return 0; |
| 1382 | } |
| 1383 | |
| 1384 | /* Gets referenced address, destroys ifaddr */ |
| 1385 | |
Adrian Bunk | 9f5336e | 2006-01-07 13:24:25 -0800 | [diff] [blame] | 1386 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1387 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1388 | if (ifp->flags&IFA_F_PERMANENT) { |
| 1389 | spin_lock_bh(&ifp->lock); |
| 1390 | addrconf_del_timer(ifp); |
| 1391 | ifp->flags |= IFA_F_TENTATIVE; |
| 1392 | spin_unlock_bh(&ifp->lock); |
| 1393 | in6_ifa_put(ifp); |
| 1394 | #ifdef CONFIG_IPV6_PRIVACY |
| 1395 | } else if (ifp->flags&IFA_F_TEMPORARY) { |
| 1396 | struct inet6_ifaddr *ifpub; |
| 1397 | spin_lock_bh(&ifp->lock); |
| 1398 | ifpub = ifp->ifpub; |
| 1399 | if (ifpub) { |
| 1400 | in6_ifa_hold(ifpub); |
| 1401 | spin_unlock_bh(&ifp->lock); |
| 1402 | ipv6_create_tempaddr(ifpub, ifp); |
| 1403 | in6_ifa_put(ifpub); |
| 1404 | } else { |
| 1405 | spin_unlock_bh(&ifp->lock); |
| 1406 | } |
| 1407 | ipv6_del_addr(ifp); |
| 1408 | #endif |
| 1409 | } else |
| 1410 | ipv6_del_addr(ifp); |
| 1411 | } |
| 1412 | |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 1413 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
| 1414 | { |
| 1415 | if (net_ratelimit()) |
| 1416 | printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name); |
| 1417 | addrconf_dad_stop(ifp); |
| 1418 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1419 | |
| 1420 | /* Join to solicited addr multicast group. */ |
| 1421 | |
| 1422 | void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) |
| 1423 | { |
| 1424 | struct in6_addr maddr; |
| 1425 | |
| 1426 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) |
| 1427 | return; |
| 1428 | |
| 1429 | addrconf_addr_solict_mult(addr, &maddr); |
| 1430 | ipv6_dev_mc_inc(dev, &maddr); |
| 1431 | } |
| 1432 | |
| 1433 | void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) |
| 1434 | { |
| 1435 | struct in6_addr maddr; |
| 1436 | |
| 1437 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) |
| 1438 | return; |
| 1439 | |
| 1440 | addrconf_addr_solict_mult(addr, &maddr); |
| 1441 | __ipv6_dev_mc_dec(idev, &maddr); |
| 1442 | } |
| 1443 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 1444 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1445 | { |
| 1446 | struct in6_addr addr; |
| 1447 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
| 1448 | if (ipv6_addr_any(&addr)) |
| 1449 | return; |
| 1450 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); |
| 1451 | } |
| 1452 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 1453 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1454 | { |
| 1455 | struct in6_addr addr; |
| 1456 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
| 1457 | if (ipv6_addr_any(&addr)) |
| 1458 | return; |
| 1459 | __ipv6_dev_ac_dec(ifp->idev, &addr); |
| 1460 | } |
| 1461 | |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 1462 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
| 1463 | { |
| 1464 | if (dev->addr_len != ETH_ALEN) |
| 1465 | return -1; |
| 1466 | memcpy(eui, dev->dev_addr, 3); |
| 1467 | memcpy(eui + 5, dev->dev_addr + 3, 3); |
| 1468 | |
| 1469 | /* |
| 1470 | * The zSeries OSA network cards can be shared among various |
| 1471 | * OS instances, but the OSA cards have only one MAC address. |
| 1472 | * This leads to duplicate address conflicts in conjunction |
| 1473 | * with IPv6 if more than one instance uses the same card. |
| 1474 | * |
| 1475 | * The driver for these cards can deliver a unique 16-bit |
| 1476 | * identifier for each instance sharing the same card. It is |
| 1477 | * placed instead of 0xFFFE in the interface identifier. The |
| 1478 | * "u" bit of the interface identifier is not inverted in this |
| 1479 | * case. Hence the resulting interface identifier has local |
| 1480 | * scope according to RFC2373. |
| 1481 | */ |
| 1482 | if (dev->dev_id) { |
| 1483 | eui[3] = (dev->dev_id >> 8) & 0xFF; |
| 1484 | eui[4] = dev->dev_id & 0xFF; |
| 1485 | } else { |
| 1486 | eui[3] = 0xFF; |
| 1487 | eui[4] = 0xFE; |
| 1488 | eui[0] ^= 2; |
| 1489 | } |
| 1490 | return 0; |
| 1491 | } |
| 1492 | |
| 1493 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) |
| 1494 | { |
| 1495 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ |
| 1496 | if (dev->addr_len != ARCNET_ALEN) |
| 1497 | return -1; |
| 1498 | memset(eui, 0, 7); |
| 1499 | eui[7] = *(u8*)dev->dev_addr; |
| 1500 | return 0; |
| 1501 | } |
| 1502 | |
| 1503 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) |
| 1504 | { |
| 1505 | if (dev->addr_len != INFINIBAND_ALEN) |
| 1506 | return -1; |
| 1507 | memcpy(eui, dev->dev_addr + 12, 8); |
| 1508 | eui[0] |= 2; |
| 1509 | return 0; |
| 1510 | } |
| 1511 | |
YOSHIFUJI Hideaki | dfd982b | 2008-04-10 15:42:09 +0900 | [diff] [blame] | 1512 | int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
| 1513 | { |
| 1514 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || |
| 1515 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || |
| 1516 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || |
| 1517 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || |
| 1518 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || |
| 1519 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; |
| 1520 | eui[1] = 0; |
| 1521 | eui[2] = 0x5E; |
| 1522 | eui[3] = 0xFE; |
| 1523 | memcpy(eui + 4, &addr, 4); |
| 1524 | return 0; |
| 1525 | } |
| 1526 | EXPORT_SYMBOL(__ipv6_isatap_ifid); |
| 1527 | |
| 1528 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) |
| 1529 | { |
| 1530 | if (dev->priv_flags & IFF_ISATAP) |
| 1531 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); |
| 1532 | return -1; |
| 1533 | } |
| 1534 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1535 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
| 1536 | { |
| 1537 | switch (dev->type) { |
| 1538 | case ARPHRD_ETHER: |
| 1539 | case ARPHRD_FDDI: |
| 1540 | case ARPHRD_IEEE802_TR: |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 1541 | return addrconf_ifid_eui48(eui, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1542 | case ARPHRD_ARCNET: |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 1543 | return addrconf_ifid_arcnet(eui, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1544 | case ARPHRD_INFINIBAND: |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 1545 | return addrconf_ifid_infiniband(eui, dev); |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 1546 | case ARPHRD_SIT: |
YOSHIFUJI Hideaki | dfd982b | 2008-04-10 15:42:09 +0900 | [diff] [blame] | 1547 | return addrconf_ifid_sit(eui, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1548 | } |
| 1549 | return -1; |
| 1550 | } |
| 1551 | |
| 1552 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) |
| 1553 | { |
| 1554 | int err = -1; |
| 1555 | struct inet6_ifaddr *ifp; |
| 1556 | |
| 1557 | read_lock_bh(&idev->lock); |
| 1558 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { |
| 1559 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { |
| 1560 | memcpy(eui, ifp->addr.s6_addr+8, 8); |
| 1561 | err = 0; |
| 1562 | break; |
| 1563 | } |
| 1564 | } |
| 1565 | read_unlock_bh(&idev->lock); |
| 1566 | return err; |
| 1567 | } |
| 1568 | |
| 1569 | #ifdef CONFIG_IPV6_PRIVACY |
| 1570 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ |
| 1571 | static int __ipv6_regen_rndid(struct inet6_dev *idev) |
| 1572 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1573 | regen: |
YOSHIFUJI Hideaki | 955189e | 2006-03-20 16:54:09 -0800 | [diff] [blame] | 1574 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1575 | idev->rndid[0] &= ~0x02; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1576 | |
| 1577 | /* |
| 1578 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: |
| 1579 | * check if generated address is not inappropriate |
| 1580 | * |
| 1581 | * - Reserved subnet anycast (RFC 2526) |
| 1582 | * 11111101 11....11 1xxxxxxx |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 1583 | * - ISATAP (RFC4214) 6.1 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1584 | * 00-00-5E-FE-xx-xx-xx-xx |
| 1585 | * - value 0 |
| 1586 | * - XXX: already assigned to an address on the device |
| 1587 | */ |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1588 | if (idev->rndid[0] == 0xfd && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
| 1590 | (idev->rndid[7]&0x80)) |
| 1591 | goto regen; |
| 1592 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { |
| 1593 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) |
| 1594 | goto regen; |
| 1595 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) |
| 1596 | goto regen; |
| 1597 | } |
| 1598 | |
| 1599 | return 0; |
| 1600 | } |
| 1601 | |
| 1602 | static void ipv6_regen_rndid(unsigned long data) |
| 1603 | { |
| 1604 | struct inet6_dev *idev = (struct inet6_dev *) data; |
| 1605 | unsigned long expires; |
| 1606 | |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1607 | rcu_read_lock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1608 | write_lock_bh(&idev->lock); |
| 1609 | |
| 1610 | if (idev->dead) |
| 1611 | goto out; |
| 1612 | |
| 1613 | if (__ipv6_regen_rndid(idev) < 0) |
| 1614 | goto out; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1615 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1616 | expires = jiffies + |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1617 | idev->cnf.temp_prefered_lft * HZ - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1618 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; |
| 1619 | if (time_before(expires, jiffies)) { |
| 1620 | printk(KERN_WARNING |
| 1621 | "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", |
| 1622 | idev->dev->name); |
| 1623 | goto out; |
| 1624 | } |
| 1625 | |
| 1626 | if (!mod_timer(&idev->regen_timer, expires)) |
| 1627 | in6_dev_hold(idev); |
| 1628 | |
| 1629 | out: |
| 1630 | write_unlock_bh(&idev->lock); |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1631 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1632 | in6_dev_put(idev); |
| 1633 | } |
| 1634 | |
| 1635 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { |
| 1636 | int ret = 0; |
| 1637 | |
| 1638 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) |
| 1639 | ret = __ipv6_regen_rndid(idev); |
| 1640 | return ret; |
| 1641 | } |
| 1642 | #endif |
| 1643 | |
| 1644 | /* |
| 1645 | * Add prefix route. |
| 1646 | */ |
| 1647 | |
| 1648 | static void |
| 1649 | 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] | 1650 | unsigned long expires, u32 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1651 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1652 | struct fib6_config cfg = { |
| 1653 | .fc_table = RT6_TABLE_PREFIX, |
| 1654 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
| 1655 | .fc_ifindex = dev->ifindex, |
| 1656 | .fc_expires = expires, |
| 1657 | .fc_dst_len = plen, |
| 1658 | .fc_flags = RTF_UP | flags, |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1659 | .fc_nlinfo.nl_net = dev_net(dev), |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1660 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1661 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1662 | ipv6_addr_copy(&cfg.fc_dst, pfx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1663 | |
| 1664 | /* Prevent useless cloning on PtP SIT. |
| 1665 | This thing is done here expecting that the whole |
| 1666 | class of non-broadcast devices need not cloning. |
| 1667 | */ |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 1668 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1669 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
| 1670 | cfg.fc_flags |= RTF_NONEXTHOP; |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 1671 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1672 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1673 | ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1674 | } |
| 1675 | |
| 1676 | /* Create "default" multicast route to the interface */ |
| 1677 | |
| 1678 | static void addrconf_add_mroute(struct net_device *dev) |
| 1679 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1680 | struct fib6_config cfg = { |
| 1681 | .fc_table = RT6_TABLE_LOCAL, |
| 1682 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
| 1683 | .fc_ifindex = dev->ifindex, |
| 1684 | .fc_dst_len = 8, |
| 1685 | .fc_flags = RTF_UP, |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1686 | .fc_nlinfo.nl_net = dev_net(dev), |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1687 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1688 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1689 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); |
| 1690 | |
| 1691 | ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1692 | } |
| 1693 | |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 1694 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1695 | static void sit_route_add(struct net_device *dev) |
| 1696 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1697 | struct fib6_config cfg = { |
| 1698 | .fc_table = RT6_TABLE_MAIN, |
| 1699 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
| 1700 | .fc_ifindex = dev->ifindex, |
| 1701 | .fc_dst_len = 96, |
| 1702 | .fc_flags = RTF_UP | RTF_NONEXTHOP, |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1703 | .fc_nlinfo.nl_net = dev_net(dev), |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1704 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1705 | |
| 1706 | /* prefix length - 96 bits "::d.d.d.d" */ |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1707 | ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1708 | } |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 1709 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1710 | |
| 1711 | static void addrconf_add_lroute(struct net_device *dev) |
| 1712 | { |
| 1713 | struct in6_addr addr; |
| 1714 | |
| 1715 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); |
| 1716 | addrconf_prefix_route(&addr, 64, dev, 0, 0); |
| 1717 | } |
| 1718 | |
| 1719 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) |
| 1720 | { |
| 1721 | struct inet6_dev *idev; |
| 1722 | |
| 1723 | ASSERT_RTNL(); |
| 1724 | |
| 1725 | if ((idev = ipv6_find_idev(dev)) == NULL) |
| 1726 | return NULL; |
| 1727 | |
| 1728 | /* Add default multicast route */ |
| 1729 | addrconf_add_mroute(dev); |
| 1730 | |
| 1731 | /* Add link local route */ |
| 1732 | addrconf_add_lroute(dev); |
| 1733 | return idev; |
| 1734 | } |
| 1735 | |
| 1736 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) |
| 1737 | { |
| 1738 | struct prefix_info *pinfo; |
| 1739 | __u32 valid_lft; |
| 1740 | __u32 prefered_lft; |
| 1741 | int addr_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1742 | struct inet6_dev *in6_dev; |
| 1743 | |
| 1744 | pinfo = (struct prefix_info *) opt; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1745 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1746 | if (len < sizeof(struct prefix_info)) { |
| 1747 | ADBG(("addrconf: prefix option too short\n")); |
| 1748 | return; |
| 1749 | } |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1750 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1751 | /* |
| 1752 | * Validation checks ([ADDRCONF], page 19) |
| 1753 | */ |
| 1754 | |
| 1755 | addr_type = ipv6_addr_type(&pinfo->prefix); |
| 1756 | |
| 1757 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) |
| 1758 | return; |
| 1759 | |
| 1760 | valid_lft = ntohl(pinfo->valid); |
| 1761 | prefered_lft = ntohl(pinfo->prefered); |
| 1762 | |
| 1763 | if (prefered_lft > valid_lft) { |
| 1764 | if (net_ratelimit()) |
| 1765 | printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); |
| 1766 | return; |
| 1767 | } |
| 1768 | |
| 1769 | in6_dev = in6_dev_get(dev); |
| 1770 | |
| 1771 | if (in6_dev == NULL) { |
| 1772 | if (net_ratelimit()) |
| 1773 | printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); |
| 1774 | return; |
| 1775 | } |
| 1776 | |
| 1777 | /* |
| 1778 | * Two things going on here: |
| 1779 | * 1) Add routes for on-link prefixes |
| 1780 | * 2) Configure prefixes with the auto flag set |
| 1781 | */ |
| 1782 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 1783 | if (pinfo->onlink) { |
| 1784 | struct rt6_info *rt; |
| 1785 | unsigned long rt_expires; |
| 1786 | |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 1787 | /* Avoid arithmetic overflow. Really, we could |
| 1788 | * save rt_expires in seconds, likely valid_lft, |
| 1789 | * but it would require division in fib gc, that it |
| 1790 | * not good. |
| 1791 | */ |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 1792 | if (HZ > USER_HZ) |
| 1793 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); |
| 1794 | else |
| 1795 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); |
YOSHIFUJI Hideaki | 3dd4bc6 | 2005-12-19 14:02:45 -0800 | [diff] [blame] | 1796 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 1797 | if (addrconf_finite_timeout(rt_expires)) |
| 1798 | rt_expires *= HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1799 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1800 | rt = rt6_lookup(dev_net(dev), &pinfo->prefix, NULL, |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 1801 | dev->ifindex, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1802 | |
YOSHIFUJI Hideaki | 2b5ead4 | 2008-05-13 01:16:24 +0900 | [diff] [blame] | 1803 | if (rt && addrconf_is_prefix_route(rt)) { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 1804 | /* Autoconf prefix route */ |
| 1805 | if (valid_lft == 0) { |
| 1806 | ip6_del_rt(rt); |
| 1807 | rt = NULL; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 1808 | } else if (addrconf_finite_timeout(rt_expires)) { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 1809 | /* not infinity */ |
| 1810 | rt->rt6i_expires = jiffies + rt_expires; |
| 1811 | rt->rt6i_flags |= RTF_EXPIRES; |
| 1812 | } else { |
| 1813 | rt->rt6i_flags &= ~RTF_EXPIRES; |
| 1814 | rt->rt6i_expires = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1815 | } |
| 1816 | } else if (valid_lft) { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 1817 | clock_t expires = 0; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 1818 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
| 1819 | if (addrconf_finite_timeout(rt_expires)) { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 1820 | /* not infinity */ |
| 1821 | flags |= RTF_EXPIRES; |
| 1822 | expires = jiffies_to_clock_t(rt_expires); |
| 1823 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1824 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 1825 | dev, expires, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1826 | } |
| 1827 | if (rt) |
| 1828 | dst_release(&rt->u.dst); |
| 1829 | } |
| 1830 | |
| 1831 | /* Try to figure out our local address for this prefix */ |
| 1832 | |
| 1833 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { |
| 1834 | struct inet6_ifaddr * ifp; |
| 1835 | struct in6_addr addr; |
| 1836 | int create = 0, update_lft = 0; |
| 1837 | |
| 1838 | if (pinfo->prefix_len == 64) { |
| 1839 | memcpy(&addr, &pinfo->prefix, 8); |
| 1840 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && |
| 1841 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { |
| 1842 | in6_dev_put(in6_dev); |
| 1843 | return; |
| 1844 | } |
| 1845 | goto ok; |
| 1846 | } |
| 1847 | if (net_ratelimit()) |
| 1848 | printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", |
| 1849 | pinfo->prefix_len); |
| 1850 | in6_dev_put(in6_dev); |
| 1851 | return; |
| 1852 | |
| 1853 | ok: |
| 1854 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1855 | ifp = ipv6_get_ifaddr(dev_net(dev), &addr, dev, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1856 | |
| 1857 | if (ifp == NULL && valid_lft) { |
| 1858 | int max_addresses = in6_dev->cnf.max_addresses; |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1859 | u32 addr_flags = 0; |
| 1860 | |
| 1861 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 1862 | if (in6_dev->cnf.optimistic_dad && |
| 1863 | !ipv6_devconf.forwarding) |
| 1864 | addr_flags = IFA_F_OPTIMISTIC; |
| 1865 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | |
| 1867 | /* Do not allow to create too much of autoconfigured |
| 1868 | * addresses; this would be too easy way to crash kernel. |
| 1869 | */ |
| 1870 | if (!max_addresses || |
| 1871 | ipv6_count_addresses(in6_dev) < max_addresses) |
| 1872 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1873 | addr_type&IPV6_ADDR_SCOPE_MASK, |
| 1874 | addr_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1875 | |
| 1876 | if (!ifp || IS_ERR(ifp)) { |
| 1877 | in6_dev_put(in6_dev); |
| 1878 | return; |
| 1879 | } |
| 1880 | |
| 1881 | update_lft = create = 1; |
| 1882 | ifp->cstamp = jiffies; |
| 1883 | addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); |
| 1884 | } |
| 1885 | |
| 1886 | if (ifp) { |
| 1887 | int flags; |
| 1888 | unsigned long now; |
| 1889 | #ifdef CONFIG_IPV6_PRIVACY |
| 1890 | struct inet6_ifaddr *ift; |
| 1891 | #endif |
| 1892 | u32 stored_lft; |
| 1893 | |
| 1894 | /* update lifetime (RFC2462 5.5.3 e) */ |
| 1895 | spin_lock(&ifp->lock); |
| 1896 | now = jiffies; |
| 1897 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) |
| 1898 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; |
| 1899 | else |
| 1900 | stored_lft = 0; |
| 1901 | if (!update_lft && stored_lft) { |
| 1902 | if (valid_lft > MIN_VALID_LIFETIME || |
| 1903 | valid_lft > stored_lft) |
| 1904 | update_lft = 1; |
| 1905 | else if (stored_lft <= MIN_VALID_LIFETIME) { |
| 1906 | /* valid_lft <= stored_lft is always true */ |
| 1907 | /* XXX: IPsec */ |
| 1908 | update_lft = 0; |
| 1909 | } else { |
| 1910 | valid_lft = MIN_VALID_LIFETIME; |
| 1911 | if (valid_lft < prefered_lft) |
| 1912 | prefered_lft = valid_lft; |
| 1913 | update_lft = 1; |
| 1914 | } |
| 1915 | } |
| 1916 | |
| 1917 | if (update_lft) { |
| 1918 | ifp->valid_lft = valid_lft; |
| 1919 | ifp->prefered_lft = prefered_lft; |
| 1920 | ifp->tstamp = now; |
| 1921 | flags = ifp->flags; |
| 1922 | ifp->flags &= ~IFA_F_DEPRECATED; |
| 1923 | spin_unlock(&ifp->lock); |
| 1924 | |
| 1925 | if (!(flags&IFA_F_TENTATIVE)) |
| 1926 | ipv6_ifa_notify(0, ifp); |
| 1927 | } else |
| 1928 | spin_unlock(&ifp->lock); |
| 1929 | |
| 1930 | #ifdef CONFIG_IPV6_PRIVACY |
| 1931 | read_lock_bh(&in6_dev->lock); |
| 1932 | /* update all temporary addresses in the list */ |
| 1933 | for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) { |
| 1934 | /* |
| 1935 | * When adjusting the lifetimes of an existing |
| 1936 | * temporary address, only lower the lifetimes. |
| 1937 | * Implementations must not increase the |
| 1938 | * lifetimes of an existing temporary address |
| 1939 | * when processing a Prefix Information Option. |
| 1940 | */ |
Benoit Boissinot | c6fbfac | 2008-04-02 00:00:58 -0700 | [diff] [blame] | 1941 | if (ifp != ift->ifpub) |
| 1942 | continue; |
| 1943 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1944 | spin_lock(&ift->lock); |
| 1945 | flags = ift->flags; |
| 1946 | if (ift->valid_lft > valid_lft && |
| 1947 | ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) |
| 1948 | ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; |
| 1949 | if (ift->prefered_lft > prefered_lft && |
| 1950 | ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) |
| 1951 | ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; |
| 1952 | spin_unlock(&ift->lock); |
| 1953 | if (!(flags&IFA_F_TENTATIVE)) |
| 1954 | ipv6_ifa_notify(0, ift); |
| 1955 | } |
| 1956 | |
| 1957 | if (create && in6_dev->cnf.use_tempaddr > 0) { |
| 1958 | /* |
| 1959 | * When a new public address is created as described in [ADDRCONF], |
| 1960 | * also create a new temporary address. |
| 1961 | */ |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1962 | read_unlock_bh(&in6_dev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1963 | ipv6_create_tempaddr(ifp, NULL); |
| 1964 | } else { |
| 1965 | read_unlock_bh(&in6_dev->lock); |
| 1966 | } |
| 1967 | #endif |
| 1968 | in6_ifa_put(ifp); |
| 1969 | addrconf_verify(0); |
| 1970 | } |
| 1971 | } |
| 1972 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); |
| 1973 | in6_dev_put(in6_dev); |
| 1974 | } |
| 1975 | |
| 1976 | /* |
| 1977 | * Set destination address. |
| 1978 | * Special case for SIT interfaces where we create a new "virtual" |
| 1979 | * device. |
| 1980 | */ |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 1981 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1982 | { |
| 1983 | struct in6_ifreq ireq; |
| 1984 | struct net_device *dev; |
| 1985 | int err = -EINVAL; |
| 1986 | |
| 1987 | rtnl_lock(); |
| 1988 | |
| 1989 | err = -EFAULT; |
| 1990 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
| 1991 | goto err_exit; |
| 1992 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 1993 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1994 | |
| 1995 | err = -ENODEV; |
| 1996 | if (dev == NULL) |
| 1997 | goto err_exit; |
| 1998 | |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 1999 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2000 | if (dev->type == ARPHRD_SIT) { |
| 2001 | struct ifreq ifr; |
| 2002 | mm_segment_t oldfs; |
| 2003 | struct ip_tunnel_parm p; |
| 2004 | |
| 2005 | err = -EADDRNOTAVAIL; |
| 2006 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) |
| 2007 | goto err_exit; |
| 2008 | |
| 2009 | memset(&p, 0, sizeof(p)); |
| 2010 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; |
| 2011 | p.iph.saddr = 0; |
| 2012 | p.iph.version = 4; |
| 2013 | p.iph.ihl = 5; |
| 2014 | p.iph.protocol = IPPROTO_IPV6; |
| 2015 | p.iph.ttl = 64; |
Stephen Hemminger | d20b310 | 2008-01-21 00:48:43 -0800 | [diff] [blame] | 2016 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2017 | |
| 2018 | oldfs = get_fs(); set_fs(KERNEL_DS); |
| 2019 | err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL); |
| 2020 | set_fs(oldfs); |
| 2021 | |
| 2022 | if (err == 0) { |
| 2023 | err = -ENOBUFS; |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2024 | dev = __dev_get_by_name(net, p.name); |
| 2025 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2026 | goto err_exit; |
| 2027 | err = dev_open(dev); |
| 2028 | } |
| 2029 | } |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2030 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2031 | |
| 2032 | err_exit: |
| 2033 | rtnl_unlock(); |
| 2034 | return err; |
| 2035 | } |
| 2036 | |
| 2037 | /* |
| 2038 | * Manual configuration of address on an interface |
| 2039 | */ |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2040 | static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx, |
Thomas Graf | 24ef0da | 2008-05-28 16:54:22 +0200 | [diff] [blame] | 2041 | unsigned int plen, __u8 ifa_flags, __u32 prefered_lft, |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2042 | __u32 valid_lft) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2043 | { |
| 2044 | struct inet6_ifaddr *ifp; |
| 2045 | struct inet6_dev *idev; |
| 2046 | struct net_device *dev; |
| 2047 | int scope; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2048 | u32 flags; |
| 2049 | clock_t expires; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2050 | unsigned long timeout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2051 | |
| 2052 | ASSERT_RTNL(); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2053 | |
Thomas Graf | 24ef0da | 2008-05-28 16:54:22 +0200 | [diff] [blame] | 2054 | if (plen > 128) |
| 2055 | return -EINVAL; |
| 2056 | |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2057 | /* check the lifetime */ |
| 2058 | if (!valid_lft || prefered_lft > valid_lft) |
| 2059 | return -EINVAL; |
| 2060 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2061 | dev = __dev_get_by_index(net, ifindex); |
| 2062 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2063 | return -ENODEV; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2064 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2065 | if ((idev = addrconf_add_dev(dev)) == NULL) |
| 2066 | return -ENOBUFS; |
| 2067 | |
| 2068 | scope = ipv6_addr_scope(pfx); |
| 2069 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2070 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
| 2071 | if (addrconf_finite_timeout(timeout)) { |
| 2072 | expires = jiffies_to_clock_t(timeout * HZ); |
| 2073 | valid_lft = timeout; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2074 | flags = RTF_EXPIRES; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2075 | } else { |
| 2076 | expires = 0; |
| 2077 | flags = 0; |
| 2078 | ifa_flags |= IFA_F_PERMANENT; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2079 | } |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2080 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2081 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
| 2082 | if (addrconf_finite_timeout(timeout)) { |
| 2083 | if (timeout == 0) |
| 2084 | ifa_flags |= IFA_F_DEPRECATED; |
| 2085 | prefered_lft = timeout; |
| 2086 | } |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2087 | |
| 2088 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); |
| 2089 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2090 | if (!IS_ERR(ifp)) { |
Herbert Xu | 06aebfb | 2006-08-09 16:52:04 -0700 | [diff] [blame] | 2091 | spin_lock_bh(&ifp->lock); |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2092 | ifp->valid_lft = valid_lft; |
| 2093 | ifp->prefered_lft = prefered_lft; |
| 2094 | ifp->tstamp = jiffies; |
Herbert Xu | 06aebfb | 2006-08-09 16:52:04 -0700 | [diff] [blame] | 2095 | spin_unlock_bh(&ifp->lock); |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2096 | |
YOSHIFUJI Hideaki | 46d4804 | 2007-02-07 20:36:26 +0900 | [diff] [blame] | 2097 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2098 | expires, flags); |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2099 | /* |
| 2100 | * Note that section 3.1 of RFC 4429 indicates |
| 2101 | * that the Optimistic flag should not be set for |
| 2102 | * manually configured addresses |
| 2103 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2104 | addrconf_dad_start(ifp, 0); |
| 2105 | in6_ifa_put(ifp); |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2106 | addrconf_verify(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2107 | return 0; |
| 2108 | } |
| 2109 | |
| 2110 | return PTR_ERR(ifp); |
| 2111 | } |
| 2112 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2113 | static int inet6_addr_del(struct net *net, int ifindex, struct in6_addr *pfx, |
Thomas Graf | 24ef0da | 2008-05-28 16:54:22 +0200 | [diff] [blame] | 2114 | unsigned int plen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2115 | { |
| 2116 | struct inet6_ifaddr *ifp; |
| 2117 | struct inet6_dev *idev; |
| 2118 | struct net_device *dev; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2119 | |
Thomas Graf | 24ef0da | 2008-05-28 16:54:22 +0200 | [diff] [blame] | 2120 | if (plen > 128) |
| 2121 | return -EINVAL; |
| 2122 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2123 | dev = __dev_get_by_index(net, ifindex); |
| 2124 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2125 | return -ENODEV; |
| 2126 | |
| 2127 | if ((idev = __in6_dev_get(dev)) == NULL) |
| 2128 | return -ENXIO; |
| 2129 | |
| 2130 | read_lock_bh(&idev->lock); |
| 2131 | for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) { |
| 2132 | if (ifp->prefix_len == plen && |
| 2133 | ipv6_addr_equal(pfx, &ifp->addr)) { |
| 2134 | in6_ifa_hold(ifp); |
| 2135 | read_unlock_bh(&idev->lock); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2136 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2137 | ipv6_del_addr(ifp); |
| 2138 | |
| 2139 | /* If the last address is deleted administratively, |
| 2140 | disable IPv6 on this interface. |
| 2141 | */ |
| 2142 | if (idev->addr_list == NULL) |
| 2143 | addrconf_ifdown(idev->dev, 1); |
| 2144 | return 0; |
| 2145 | } |
| 2146 | } |
| 2147 | read_unlock_bh(&idev->lock); |
| 2148 | return -EADDRNOTAVAIL; |
| 2149 | } |
| 2150 | |
| 2151 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2152 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2153 | { |
| 2154 | struct in6_ifreq ireq; |
| 2155 | int err; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2156 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2157 | if (!capable(CAP_NET_ADMIN)) |
| 2158 | return -EPERM; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2159 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2160 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
| 2161 | return -EFAULT; |
| 2162 | |
| 2163 | rtnl_lock(); |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2164 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
| 2165 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, |
| 2166 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2167 | rtnl_unlock(); |
| 2168 | return err; |
| 2169 | } |
| 2170 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2171 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2172 | { |
| 2173 | struct in6_ifreq ireq; |
| 2174 | int err; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2175 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2176 | if (!capable(CAP_NET_ADMIN)) |
| 2177 | return -EPERM; |
| 2178 | |
| 2179 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
| 2180 | return -EFAULT; |
| 2181 | |
| 2182 | rtnl_lock(); |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2183 | err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
| 2184 | ireq.ifr6_prefixlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2185 | rtnl_unlock(); |
| 2186 | return err; |
| 2187 | } |
| 2188 | |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2189 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2190 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
| 2191 | { |
| 2192 | struct inet6_ifaddr * ifp; |
| 2193 | struct in6_addr addr; |
| 2194 | struct net_device *dev; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2195 | struct net *net = dev_net(idev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2196 | int scope; |
| 2197 | |
| 2198 | ASSERT_RTNL(); |
| 2199 | |
| 2200 | memset(&addr, 0, sizeof(struct in6_addr)); |
| 2201 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); |
| 2202 | |
| 2203 | if (idev->dev->flags&IFF_POINTOPOINT) { |
| 2204 | addr.s6_addr32[0] = htonl(0xfe800000); |
| 2205 | scope = IFA_LINK; |
| 2206 | } else { |
| 2207 | scope = IPV6_ADDR_COMPATv4; |
| 2208 | } |
| 2209 | |
| 2210 | if (addr.s6_addr32[3]) { |
| 2211 | ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT); |
| 2212 | if (!IS_ERR(ifp)) { |
| 2213 | spin_lock_bh(&ifp->lock); |
| 2214 | ifp->flags &= ~IFA_F_TENTATIVE; |
| 2215 | spin_unlock_bh(&ifp->lock); |
| 2216 | ipv6_ifa_notify(RTM_NEWADDR, ifp); |
| 2217 | in6_ifa_put(ifp); |
| 2218 | } |
| 2219 | return; |
| 2220 | } |
| 2221 | |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 2222 | for_each_netdev(net, dev) { |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 2223 | struct in_device * in_dev = __in_dev_get_rtnl(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2224 | if (in_dev && (dev->flags & IFF_UP)) { |
| 2225 | struct in_ifaddr * ifa; |
| 2226 | |
| 2227 | int flag = scope; |
| 2228 | |
| 2229 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { |
| 2230 | int plen; |
| 2231 | |
| 2232 | addr.s6_addr32[3] = ifa->ifa_local; |
| 2233 | |
| 2234 | if (ifa->ifa_scope == RT_SCOPE_LINK) |
| 2235 | continue; |
| 2236 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { |
| 2237 | if (idev->dev->flags&IFF_POINTOPOINT) |
| 2238 | continue; |
| 2239 | flag |= IFA_HOST; |
| 2240 | } |
| 2241 | if (idev->dev->flags&IFF_POINTOPOINT) |
| 2242 | plen = 64; |
| 2243 | else |
| 2244 | plen = 96; |
| 2245 | |
| 2246 | ifp = ipv6_add_addr(idev, &addr, plen, flag, |
| 2247 | IFA_F_PERMANENT); |
| 2248 | if (!IS_ERR(ifp)) { |
| 2249 | spin_lock_bh(&ifp->lock); |
| 2250 | ifp->flags &= ~IFA_F_TENTATIVE; |
| 2251 | spin_unlock_bh(&ifp->lock); |
| 2252 | ipv6_ifa_notify(RTM_NEWADDR, ifp); |
| 2253 | in6_ifa_put(ifp); |
| 2254 | } |
| 2255 | } |
| 2256 | } |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2257 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2258 | } |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2259 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2260 | |
| 2261 | static void init_loopback(struct net_device *dev) |
| 2262 | { |
| 2263 | struct inet6_dev *idev; |
| 2264 | struct inet6_ifaddr * ifp; |
| 2265 | |
| 2266 | /* ::1 */ |
| 2267 | |
| 2268 | ASSERT_RTNL(); |
| 2269 | |
| 2270 | if ((idev = ipv6_find_idev(dev)) == NULL) { |
| 2271 | printk(KERN_DEBUG "init loopback: add_dev failed\n"); |
| 2272 | return; |
| 2273 | } |
| 2274 | |
| 2275 | ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT); |
| 2276 | if (!IS_ERR(ifp)) { |
| 2277 | spin_lock_bh(&ifp->lock); |
| 2278 | ifp->flags &= ~IFA_F_TENTATIVE; |
| 2279 | spin_unlock_bh(&ifp->lock); |
| 2280 | ipv6_ifa_notify(RTM_NEWADDR, ifp); |
| 2281 | in6_ifa_put(ifp); |
| 2282 | } |
| 2283 | } |
| 2284 | |
| 2285 | static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) |
| 2286 | { |
| 2287 | struct inet6_ifaddr * ifp; |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2288 | u32 addr_flags = IFA_F_PERMANENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2289 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2290 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 2291 | if (idev->cnf.optimistic_dad && |
| 2292 | !ipv6_devconf.forwarding) |
| 2293 | addr_flags |= IFA_F_OPTIMISTIC; |
| 2294 | #endif |
| 2295 | |
| 2296 | |
| 2297 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2298 | if (!IS_ERR(ifp)) { |
YOSHIFUJI Hideaki | 46d4804 | 2007-02-07 20:36:26 +0900 | [diff] [blame] | 2299 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2300 | addrconf_dad_start(ifp, 0); |
| 2301 | in6_ifa_put(ifp); |
| 2302 | } |
| 2303 | } |
| 2304 | |
| 2305 | static void addrconf_dev_config(struct net_device *dev) |
| 2306 | { |
| 2307 | struct in6_addr addr; |
| 2308 | struct inet6_dev * idev; |
| 2309 | |
| 2310 | ASSERT_RTNL(); |
| 2311 | |
Herbert Xu | 74235a2 | 2007-06-14 13:02:55 -0700 | [diff] [blame] | 2312 | if ((dev->type != ARPHRD_ETHER) && |
| 2313 | (dev->type != ARPHRD_FDDI) && |
| 2314 | (dev->type != ARPHRD_IEEE802_TR) && |
| 2315 | (dev->type != ARPHRD_ARCNET) && |
| 2316 | (dev->type != ARPHRD_INFINIBAND)) { |
| 2317 | /* Alas, we support only Ethernet autoconfiguration. */ |
| 2318 | return; |
| 2319 | } |
| 2320 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2321 | idev = addrconf_add_dev(dev); |
| 2322 | if (idev == NULL) |
| 2323 | return; |
| 2324 | |
| 2325 | memset(&addr, 0, sizeof(struct in6_addr)); |
| 2326 | addr.s6_addr32[0] = htonl(0xFE800000); |
| 2327 | |
| 2328 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) |
| 2329 | addrconf_add_linklocal(idev, &addr); |
| 2330 | } |
| 2331 | |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2332 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2333 | static void addrconf_sit_config(struct net_device *dev) |
| 2334 | { |
| 2335 | struct inet6_dev *idev; |
| 2336 | |
| 2337 | ASSERT_RTNL(); |
| 2338 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2339 | /* |
| 2340 | * Configure the tunnel with one of our IPv4 |
| 2341 | * addresses... we should configure all of |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2342 | * our v4 addrs in the tunnel |
| 2343 | */ |
| 2344 | |
| 2345 | if ((idev = ipv6_find_idev(dev)) == NULL) { |
| 2346 | printk(KERN_DEBUG "init sit: add_dev failed\n"); |
| 2347 | return; |
| 2348 | } |
| 2349 | |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 2350 | if (dev->priv_flags & IFF_ISATAP) { |
| 2351 | struct in6_addr addr; |
| 2352 | |
| 2353 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); |
| 2354 | addrconf_prefix_route(&addr, 64, dev, 0, 0); |
| 2355 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) |
| 2356 | addrconf_add_linklocal(idev, &addr); |
| 2357 | return; |
| 2358 | } |
| 2359 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2360 | sit_add_v4_addrs(idev); |
| 2361 | |
| 2362 | if (dev->flags&IFF_POINTOPOINT) { |
| 2363 | addrconf_add_mroute(dev); |
| 2364 | addrconf_add_lroute(dev); |
| 2365 | } else |
| 2366 | sit_route_add(dev); |
| 2367 | } |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2368 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2369 | |
| 2370 | static inline int |
| 2371 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) |
| 2372 | { |
| 2373 | struct in6_addr lladdr; |
| 2374 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2375 | if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2376 | addrconf_add_linklocal(idev, &lladdr); |
| 2377 | return 0; |
| 2378 | } |
| 2379 | return -1; |
| 2380 | } |
| 2381 | |
| 2382 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) |
| 2383 | { |
| 2384 | struct net_device *link_dev; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2385 | struct net *net = dev_net(idev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2386 | |
| 2387 | /* first try to inherit the link-local address from the link device */ |
| 2388 | if (idev->dev->iflink && |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 2389 | (link_dev = __dev_get_by_index(net, idev->dev->iflink))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2390 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
| 2391 | return; |
| 2392 | } |
| 2393 | /* then try to inherit it from any device */ |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 2394 | for_each_netdev(net, link_dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2395 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
| 2396 | return; |
| 2397 | } |
| 2398 | printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); |
| 2399 | } |
| 2400 | |
| 2401 | /* |
| 2402 | * Autoconfigure tunnel with a link-local address so routing protocols, |
| 2403 | * DHCPv6, MLD etc. can be run over the virtual link |
| 2404 | */ |
| 2405 | |
| 2406 | static void addrconf_ip6_tnl_config(struct net_device *dev) |
| 2407 | { |
| 2408 | struct inet6_dev *idev; |
| 2409 | |
| 2410 | ASSERT_RTNL(); |
| 2411 | |
| 2412 | if ((idev = addrconf_add_dev(dev)) == NULL) { |
| 2413 | printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); |
| 2414 | return; |
| 2415 | } |
| 2416 | ip6_tnl_add_linklocal(idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2417 | } |
| 2418 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2419 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2420 | void * data) |
| 2421 | { |
| 2422 | struct net_device *dev = (struct net_device *) data; |
Herbert Xu | 74235a2 | 2007-06-14 13:02:55 -0700 | [diff] [blame] | 2423 | struct inet6_dev *idev = __in6_dev_get(dev); |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 2424 | int run_pending = 0; |
Herbert Xu | b217d61 | 2007-07-30 17:04:52 -0700 | [diff] [blame] | 2425 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2426 | |
| 2427 | switch(event) { |
YOSHIFUJI Hideaki | 45ba9dd | 2007-02-15 02:07:27 +0900 | [diff] [blame] | 2428 | case NETDEV_REGISTER: |
Herbert Xu | 74235a2 | 2007-06-14 13:02:55 -0700 | [diff] [blame] | 2429 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
YOSHIFUJI Hideaki | 45ba9dd | 2007-02-15 02:07:27 +0900 | [diff] [blame] | 2430 | idev = ipv6_add_dev(dev); |
| 2431 | if (!idev) |
Herbert Xu | b217d61 | 2007-07-30 17:04:52 -0700 | [diff] [blame] | 2432 | return notifier_from_errno(-ENOMEM); |
YOSHIFUJI Hideaki | 45ba9dd | 2007-02-15 02:07:27 +0900 | [diff] [blame] | 2433 | } |
| 2434 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2435 | case NETDEV_UP: |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2436 | case NETDEV_CHANGE: |
Jay Vosburgh | c2edacf | 2007-07-09 10:42:47 -0700 | [diff] [blame] | 2437 | if (dev->flags & IFF_SLAVE) |
| 2438 | break; |
| 2439 | |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2440 | if (event == NETDEV_UP) { |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 2441 | if (!addrconf_qdisc_ok(dev)) { |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2442 | /* device is not ready yet. */ |
| 2443 | printk(KERN_INFO |
| 2444 | "ADDRCONF(NETDEV_UP): %s: " |
| 2445 | "link is not ready\n", |
| 2446 | dev->name); |
| 2447 | break; |
| 2448 | } |
Kristian Slavov | 9908104 | 2006-02-08 16:10:53 -0800 | [diff] [blame] | 2449 | |
Evgeniy Polyakov | d31c7b8 | 2007-11-30 23:36:08 +1100 | [diff] [blame] | 2450 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
| 2451 | idev = ipv6_add_dev(dev); |
| 2452 | |
Kristian Slavov | 9908104 | 2006-02-08 16:10:53 -0800 | [diff] [blame] | 2453 | if (idev) |
| 2454 | idev->if_flags |= IF_READY; |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2455 | } else { |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 2456 | if (!addrconf_qdisc_ok(dev)) { |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2457 | /* device is still not ready. */ |
| 2458 | break; |
| 2459 | } |
| 2460 | |
| 2461 | if (idev) { |
| 2462 | if (idev->if_flags & IF_READY) { |
| 2463 | /* device is already configured. */ |
| 2464 | break; |
| 2465 | } |
| 2466 | idev->if_flags |= IF_READY; |
| 2467 | } |
| 2468 | |
| 2469 | printk(KERN_INFO |
| 2470 | "ADDRCONF(NETDEV_CHANGE): %s: " |
| 2471 | "link becomes ready\n", |
| 2472 | dev->name); |
| 2473 | |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 2474 | run_pending = 1; |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2475 | } |
| 2476 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2477 | switch(dev->type) { |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2478 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2479 | case ARPHRD_SIT: |
| 2480 | addrconf_sit_config(dev); |
| 2481 | break; |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2482 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2483 | case ARPHRD_TUNNEL6: |
| 2484 | addrconf_ip6_tnl_config(dev); |
| 2485 | break; |
| 2486 | case ARPHRD_LOOPBACK: |
| 2487 | init_loopback(dev); |
| 2488 | break; |
| 2489 | |
| 2490 | default: |
| 2491 | addrconf_dev_config(dev); |
| 2492 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 2493 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2494 | if (idev) { |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 2495 | if (run_pending) |
| 2496 | addrconf_dad_run(idev); |
| 2497 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2498 | /* If the MTU changed during the interface down, when the |
| 2499 | interface up, the changed MTU must be reflected in the |
| 2500 | idev as well as routers. |
| 2501 | */ |
| 2502 | if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) { |
| 2503 | rt6_mtu_change(dev, dev->mtu); |
| 2504 | idev->cnf.mtu6 = dev->mtu; |
| 2505 | } |
| 2506 | idev->tstamp = jiffies; |
| 2507 | inet6_ifinfo_notify(RTM_NEWLINK, idev); |
| 2508 | /* If the changed mtu during down is lower than IPV6_MIN_MTU |
| 2509 | stop IPv6 on this interface. |
| 2510 | */ |
| 2511 | if (dev->mtu < IPV6_MIN_MTU) |
| 2512 | addrconf_ifdown(dev, event != NETDEV_DOWN); |
| 2513 | } |
| 2514 | break; |
| 2515 | |
| 2516 | case NETDEV_CHANGEMTU: |
Evgeniy Polyakov | d31c7b8 | 2007-11-30 23:36:08 +1100 | [diff] [blame] | 2517 | if (idev && dev->mtu >= IPV6_MIN_MTU) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2518 | rt6_mtu_change(dev, dev->mtu); |
| 2519 | idev->cnf.mtu6 = dev->mtu; |
| 2520 | break; |
| 2521 | } |
| 2522 | |
Evgeniy Polyakov | d31c7b8 | 2007-11-30 23:36:08 +1100 | [diff] [blame] | 2523 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
| 2524 | idev = ipv6_add_dev(dev); |
| 2525 | if (idev) |
| 2526 | break; |
| 2527 | } |
| 2528 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2529 | /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */ |
| 2530 | |
| 2531 | case NETDEV_DOWN: |
| 2532 | case NETDEV_UNREGISTER: |
| 2533 | /* |
| 2534 | * Remove all addresses from this interface. |
| 2535 | */ |
| 2536 | addrconf_ifdown(dev, event != NETDEV_DOWN); |
| 2537 | break; |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2538 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2539 | case NETDEV_CHANGENAME: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2540 | if (idev) { |
Stephen Hemminger | 5632c51 | 2007-04-28 21:16:39 -0700 | [diff] [blame] | 2541 | snmp6_unregister_dev(idev); |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 2542 | addrconf_sysctl_unregister(idev); |
Pavel Emelyanov | f52295a | 2007-12-02 00:58:37 +1100 | [diff] [blame] | 2543 | addrconf_sysctl_register(idev); |
Herbert Xu | b217d61 | 2007-07-30 17:04:52 -0700 | [diff] [blame] | 2544 | err = snmp6_register_dev(idev); |
| 2545 | if (err) |
| 2546 | return notifier_from_errno(err); |
Stephen Hemminger | 5632c51 | 2007-04-28 21:16:39 -0700 | [diff] [blame] | 2547 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2548 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 2549 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2550 | |
| 2551 | return NOTIFY_OK; |
| 2552 | } |
| 2553 | |
| 2554 | /* |
| 2555 | * addrconf module should be notified of a device going up |
| 2556 | */ |
| 2557 | static struct notifier_block ipv6_dev_notf = { |
| 2558 | .notifier_call = addrconf_notify, |
| 2559 | .priority = 0 |
| 2560 | }; |
| 2561 | |
| 2562 | static int addrconf_ifdown(struct net_device *dev, int how) |
| 2563 | { |
| 2564 | struct inet6_dev *idev; |
| 2565 | struct inet6_ifaddr *ifa, **bifa; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2566 | struct net *net = dev_net(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2567 | int i; |
| 2568 | |
| 2569 | ASSERT_RTNL(); |
| 2570 | |
Denis V. Lunev | eb86757 | 2008-04-03 13:31:53 -0700 | [diff] [blame] | 2571 | if ((dev->flags & IFF_LOOPBACK) && how == 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2572 | how = 0; |
| 2573 | |
Daniel Lezcano | f3db485 | 2008-03-03 23:27:06 -0800 | [diff] [blame] | 2574 | rt6_ifdown(net, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2575 | neigh_ifdown(&nd_tbl, dev); |
| 2576 | |
| 2577 | idev = __in6_dev_get(dev); |
| 2578 | if (idev == NULL) |
| 2579 | return -ENODEV; |
| 2580 | |
| 2581 | /* Step 1: remove reference to ipv6 device from parent device. |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2582 | Do not dev_put! |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2583 | */ |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 2584 | if (how) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2585 | idev->dead = 1; |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 2586 | |
| 2587 | /* protected by rtnl_lock */ |
| 2588 | rcu_assign_pointer(dev->ip6_ptr, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2589 | |
| 2590 | /* Step 1.5: remove snmp6 entry */ |
| 2591 | snmp6_unregister_dev(idev); |
| 2592 | |
| 2593 | } |
| 2594 | |
| 2595 | /* Step 2: clear hash table */ |
| 2596 | for (i=0; i<IN6_ADDR_HSIZE; i++) { |
| 2597 | bifa = &inet6_addr_lst[i]; |
| 2598 | |
| 2599 | write_lock_bh(&addrconf_hash_lock); |
| 2600 | while ((ifa = *bifa) != NULL) { |
| 2601 | if (ifa->idev == idev) { |
| 2602 | *bifa = ifa->lst_next; |
| 2603 | ifa->lst_next = NULL; |
| 2604 | addrconf_del_timer(ifa); |
| 2605 | in6_ifa_put(ifa); |
| 2606 | continue; |
| 2607 | } |
| 2608 | bifa = &ifa->lst_next; |
| 2609 | } |
| 2610 | write_unlock_bh(&addrconf_hash_lock); |
| 2611 | } |
| 2612 | |
| 2613 | write_lock_bh(&idev->lock); |
| 2614 | |
| 2615 | /* Step 3: clear flags for stateless addrconf */ |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 2616 | if (!how) |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2617 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2618 | |
| 2619 | /* Step 4: clear address list */ |
| 2620 | #ifdef CONFIG_IPV6_PRIVACY |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 2621 | if (how && del_timer(&idev->regen_timer)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2622 | in6_dev_put(idev); |
| 2623 | |
| 2624 | /* clear tempaddr list */ |
| 2625 | while ((ifa = idev->tempaddr_list) != NULL) { |
| 2626 | idev->tempaddr_list = ifa->tmp_next; |
| 2627 | ifa->tmp_next = NULL; |
| 2628 | ifa->dead = 1; |
| 2629 | write_unlock_bh(&idev->lock); |
| 2630 | spin_lock_bh(&ifa->lock); |
| 2631 | |
| 2632 | if (ifa->ifpub) { |
| 2633 | in6_ifa_put(ifa->ifpub); |
| 2634 | ifa->ifpub = NULL; |
| 2635 | } |
| 2636 | spin_unlock_bh(&ifa->lock); |
| 2637 | in6_ifa_put(ifa); |
| 2638 | write_lock_bh(&idev->lock); |
| 2639 | } |
| 2640 | #endif |
| 2641 | while ((ifa = idev->addr_list) != NULL) { |
| 2642 | idev->addr_list = ifa->if_next; |
| 2643 | ifa->if_next = NULL; |
| 2644 | ifa->dead = 1; |
| 2645 | addrconf_del_timer(ifa); |
| 2646 | write_unlock_bh(&idev->lock); |
| 2647 | |
| 2648 | __ipv6_ifa_notify(RTM_DELADDR, ifa); |
Vlad Yasevich | 063ed36 | 2007-07-15 00:16:35 -0700 | [diff] [blame] | 2649 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2650 | in6_ifa_put(ifa); |
| 2651 | |
| 2652 | write_lock_bh(&idev->lock); |
| 2653 | } |
| 2654 | write_unlock_bh(&idev->lock); |
| 2655 | |
| 2656 | /* Step 5: Discard multicast list */ |
| 2657 | |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 2658 | if (how) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2659 | ipv6_mc_destroy_dev(idev); |
| 2660 | else |
| 2661 | ipv6_mc_down(idev); |
| 2662 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2663 | idev->tstamp = jiffies; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2664 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2665 | /* Shot the device (if unregistered) */ |
| 2666 | |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 2667 | if (how) { |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 2668 | addrconf_sysctl_unregister(idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2669 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
| 2670 | neigh_ifdown(&nd_tbl, dev); |
| 2671 | in6_dev_put(idev); |
| 2672 | } |
| 2673 | return 0; |
| 2674 | } |
| 2675 | |
| 2676 | static void addrconf_rs_timer(unsigned long data) |
| 2677 | { |
| 2678 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; |
| 2679 | |
| 2680 | if (ifp->idev->cnf.forwarding) |
| 2681 | goto out; |
| 2682 | |
| 2683 | if (ifp->idev->if_flags & IF_RA_RCVD) { |
| 2684 | /* |
| 2685 | * Announcement received after solicitation |
| 2686 | * was sent |
| 2687 | */ |
| 2688 | goto out; |
| 2689 | } |
| 2690 | |
| 2691 | spin_lock(&ifp->lock); |
| 2692 | if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2693 | /* The wait after the last probe can be shorter */ |
| 2694 | addrconf_mod_timer(ifp, AC_RS, |
| 2695 | (ifp->probes == ifp->idev->cnf.rtr_solicits) ? |
| 2696 | ifp->idev->cnf.rtr_solicit_delay : |
| 2697 | ifp->idev->cnf.rtr_solicit_interval); |
| 2698 | spin_unlock(&ifp->lock); |
| 2699 | |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 2700 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2701 | } else { |
| 2702 | spin_unlock(&ifp->lock); |
| 2703 | /* |
| 2704 | * Note: we do not support deprecated "all on-link" |
| 2705 | * assumption any longer. |
| 2706 | */ |
| 2707 | printk(KERN_DEBUG "%s: no IPv6 routers present\n", |
| 2708 | ifp->idev->dev->name); |
| 2709 | } |
| 2710 | |
| 2711 | out: |
| 2712 | in6_ifa_put(ifp); |
| 2713 | } |
| 2714 | |
| 2715 | /* |
| 2716 | * Duplicate Address Detection |
| 2717 | */ |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2718 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
| 2719 | { |
| 2720 | unsigned long rand_num; |
| 2721 | struct inet6_dev *idev = ifp->idev; |
| 2722 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2723 | if (ifp->flags & IFA_F_OPTIMISTIC) |
| 2724 | rand_num = 0; |
| 2725 | else |
| 2726 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); |
| 2727 | |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2728 | ifp->probes = idev->cnf.dad_transmits; |
| 2729 | addrconf_mod_timer(ifp, AC_DAD, rand_num); |
| 2730 | } |
| 2731 | |
Jamal Hadi Salim | e431b8c | 2005-06-18 22:55:31 -0700 | [diff] [blame] | 2732 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2733 | { |
| 2734 | struct inet6_dev *idev = ifp->idev; |
| 2735 | struct net_device *dev = idev->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2736 | |
| 2737 | addrconf_join_solict(dev, &ifp->addr); |
| 2738 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2739 | net_srandom(ifp->addr.s6_addr32[3]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2740 | |
| 2741 | read_lock_bh(&idev->lock); |
| 2742 | if (ifp->dead) |
| 2743 | goto out; |
| 2744 | spin_lock_bh(&ifp->lock); |
| 2745 | |
| 2746 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 2747 | !(ifp->flags&IFA_F_TENTATIVE) || |
| 2748 | ifp->flags & IFA_F_NODAD) { |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2749 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2750 | spin_unlock_bh(&ifp->lock); |
| 2751 | read_unlock_bh(&idev->lock); |
| 2752 | |
| 2753 | addrconf_dad_completed(ifp); |
| 2754 | return; |
| 2755 | } |
| 2756 | |
YOSHIFUJI Hideaki | 6732bad | 2005-12-27 13:35:15 -0800 | [diff] [blame] | 2757 | if (!(idev->if_flags & IF_READY)) { |
YOSHIFUJI Hideaki | 3dd3bf8 | 2005-12-23 11:23:21 -0800 | [diff] [blame] | 2758 | spin_unlock_bh(&ifp->lock); |
YOSHIFUJI Hideaki | 6732bad | 2005-12-27 13:35:15 -0800 | [diff] [blame] | 2759 | read_unlock_bh(&idev->lock); |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2760 | /* |
| 2761 | * If the defice is not ready: |
| 2762 | * - keep it tentative if it is a permanent address. |
| 2763 | * - otherwise, kill it. |
| 2764 | */ |
| 2765 | in6_ifa_hold(ifp); |
| 2766 | addrconf_dad_stop(ifp); |
YOSHIFUJI Hideaki | 6732bad | 2005-12-27 13:35:15 -0800 | [diff] [blame] | 2767 | return; |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2768 | } |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2769 | |
| 2770 | /* |
| 2771 | * Optimistic nodes can start receiving |
| 2772 | * Frames right away |
| 2773 | */ |
| 2774 | if(ifp->flags & IFA_F_OPTIMISTIC) |
| 2775 | ip6_ins_rt(ifp->rt); |
| 2776 | |
YOSHIFUJI Hideaki | 6732bad | 2005-12-27 13:35:15 -0800 | [diff] [blame] | 2777 | addrconf_dad_kick(ifp); |
| 2778 | spin_unlock_bh(&ifp->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2779 | out: |
| 2780 | read_unlock_bh(&idev->lock); |
| 2781 | } |
| 2782 | |
| 2783 | static void addrconf_dad_timer(unsigned long data) |
| 2784 | { |
| 2785 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; |
| 2786 | struct inet6_dev *idev = ifp->idev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2787 | struct in6_addr mcaddr; |
| 2788 | |
| 2789 | read_lock_bh(&idev->lock); |
| 2790 | if (idev->dead) { |
| 2791 | read_unlock_bh(&idev->lock); |
| 2792 | goto out; |
| 2793 | } |
| 2794 | spin_lock_bh(&ifp->lock); |
| 2795 | if (ifp->probes == 0) { |
| 2796 | /* |
| 2797 | * DAD was successful |
| 2798 | */ |
| 2799 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2800 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2801 | spin_unlock_bh(&ifp->lock); |
| 2802 | read_unlock_bh(&idev->lock); |
| 2803 | |
| 2804 | addrconf_dad_completed(ifp); |
| 2805 | |
| 2806 | goto out; |
| 2807 | } |
| 2808 | |
| 2809 | ifp->probes--; |
| 2810 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); |
| 2811 | spin_unlock_bh(&ifp->lock); |
| 2812 | read_unlock_bh(&idev->lock); |
| 2813 | |
| 2814 | /* send a neighbour solicitation for our addr */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2815 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
YOSHIFUJI Hideaki | d7aabf2 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 2816 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2817 | out: |
| 2818 | in6_ifa_put(ifp); |
| 2819 | } |
| 2820 | |
| 2821 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) |
| 2822 | { |
| 2823 | struct net_device * dev = ifp->idev->dev; |
| 2824 | |
| 2825 | /* |
| 2826 | * Configure the address for reception. Now it is valid. |
| 2827 | */ |
| 2828 | |
| 2829 | ipv6_ifa_notify(RTM_NEWADDR, ifp); |
| 2830 | |
| 2831 | /* If added prefix is link local and forwarding is off, |
| 2832 | start sending router solicitations. |
| 2833 | */ |
| 2834 | |
| 2835 | if (ifp->idev->cnf.forwarding == 0 && |
| 2836 | ifp->idev->cnf.rtr_solicits > 0 && |
| 2837 | (dev->flags&IFF_LOOPBACK) == 0 && |
| 2838 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2839 | /* |
| 2840 | * If a host as already performed a random delay |
| 2841 | * [...] as part of DAD [...] there is no need |
| 2842 | * to delay again before sending the first RS |
| 2843 | */ |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 2844 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2845 | |
| 2846 | spin_lock_bh(&ifp->lock); |
| 2847 | ifp->probes = 1; |
| 2848 | ifp->idev->if_flags |= IF_RS_SENT; |
| 2849 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); |
| 2850 | spin_unlock_bh(&ifp->lock); |
| 2851 | } |
| 2852 | } |
| 2853 | |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 2854 | static void addrconf_dad_run(struct inet6_dev *idev) { |
| 2855 | struct inet6_ifaddr *ifp; |
| 2856 | |
| 2857 | read_lock_bh(&idev->lock); |
| 2858 | for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) { |
| 2859 | spin_lock_bh(&ifp->lock); |
| 2860 | if (!(ifp->flags & IFA_F_TENTATIVE)) { |
| 2861 | spin_unlock_bh(&ifp->lock); |
| 2862 | continue; |
| 2863 | } |
| 2864 | spin_unlock_bh(&ifp->lock); |
| 2865 | addrconf_dad_kick(ifp); |
| 2866 | } |
| 2867 | read_unlock_bh(&idev->lock); |
| 2868 | } |
| 2869 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2870 | #ifdef CONFIG_PROC_FS |
| 2871 | struct if6_iter_state { |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 2872 | struct seq_net_private p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2873 | int bucket; |
| 2874 | }; |
| 2875 | |
| 2876 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) |
| 2877 | { |
| 2878 | struct inet6_ifaddr *ifa = NULL; |
| 2879 | struct if6_iter_state *state = seq->private; |
YOSHIFUJI Hideaki | 1218854 | 2008-03-26 02:36:06 +0900 | [diff] [blame] | 2880 | struct net *net = seq_file_net(seq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2881 | |
| 2882 | for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { |
| 2883 | ifa = inet6_addr_lst[state->bucket]; |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 2884 | |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 2885 | while (ifa && !net_eq(dev_net(ifa->idev->dev), net)) |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 2886 | ifa = ifa->lst_next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2887 | if (ifa) |
| 2888 | break; |
| 2889 | } |
| 2890 | return ifa; |
| 2891 | } |
| 2892 | |
| 2893 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa) |
| 2894 | { |
| 2895 | struct if6_iter_state *state = seq->private; |
YOSHIFUJI Hideaki | 1218854 | 2008-03-26 02:36:06 +0900 | [diff] [blame] | 2896 | struct net *net = seq_file_net(seq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2897 | |
| 2898 | ifa = ifa->lst_next; |
| 2899 | try_again: |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 2900 | if (ifa) { |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 2901 | if (!net_eq(dev_net(ifa->idev->dev), net)) { |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 2902 | ifa = ifa->lst_next; |
| 2903 | goto try_again; |
| 2904 | } |
| 2905 | } |
| 2906 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2907 | if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) { |
| 2908 | ifa = inet6_addr_lst[state->bucket]; |
| 2909 | goto try_again; |
| 2910 | } |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 2911 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2912 | return ifa; |
| 2913 | } |
| 2914 | |
| 2915 | static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) |
| 2916 | { |
| 2917 | struct inet6_ifaddr *ifa = if6_get_first(seq); |
| 2918 | |
| 2919 | if (ifa) |
| 2920 | while(pos && (ifa = if6_get_next(seq, ifa)) != NULL) |
| 2921 | --pos; |
| 2922 | return pos ? NULL : ifa; |
| 2923 | } |
| 2924 | |
| 2925 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) |
Stephen Hemminger | d20b310 | 2008-01-21 00:48:43 -0800 | [diff] [blame] | 2926 | __acquires(addrconf_hash_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2927 | { |
| 2928 | read_lock_bh(&addrconf_hash_lock); |
| 2929 | return if6_get_idx(seq, *pos); |
| 2930 | } |
| 2931 | |
| 2932 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 2933 | { |
| 2934 | struct inet6_ifaddr *ifa; |
| 2935 | |
| 2936 | ifa = if6_get_next(seq, v); |
| 2937 | ++*pos; |
| 2938 | return ifa; |
| 2939 | } |
| 2940 | |
| 2941 | static void if6_seq_stop(struct seq_file *seq, void *v) |
Stephen Hemminger | d20b310 | 2008-01-21 00:48:43 -0800 | [diff] [blame] | 2942 | __releases(addrconf_hash_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2943 | { |
| 2944 | read_unlock_bh(&addrconf_hash_lock); |
| 2945 | } |
| 2946 | |
| 2947 | static int if6_seq_show(struct seq_file *seq, void *v) |
| 2948 | { |
| 2949 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; |
| 2950 | seq_printf(seq, |
YOSHIFUJI Hideaki | 9343e79 | 2006-01-17 02:10:53 -0800 | [diff] [blame] | 2951 | NIP6_SEQFMT " %02x %02x %02x %02x %8s\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2952 | NIP6(ifp->addr), |
| 2953 | ifp->idev->dev->ifindex, |
| 2954 | ifp->prefix_len, |
| 2955 | ifp->scope, |
| 2956 | ifp->flags, |
| 2957 | ifp->idev->dev->name); |
| 2958 | return 0; |
| 2959 | } |
| 2960 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 2961 | static const struct seq_operations if6_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2962 | .start = if6_seq_start, |
| 2963 | .next = if6_seq_next, |
| 2964 | .show = if6_seq_show, |
| 2965 | .stop = if6_seq_stop, |
| 2966 | }; |
| 2967 | |
| 2968 | static int if6_seq_open(struct inode *inode, struct file *file) |
| 2969 | { |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 2970 | return seq_open_net(inode, file, &if6_seq_ops, |
| 2971 | sizeof(struct if6_iter_state)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2972 | } |
| 2973 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 2974 | static const struct file_operations if6_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2975 | .owner = THIS_MODULE, |
| 2976 | .open = if6_seq_open, |
| 2977 | .read = seq_read, |
| 2978 | .llseek = seq_lseek, |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 2979 | .release = seq_release_net, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2980 | }; |
| 2981 | |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 2982 | static int if6_proc_net_init(struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2983 | { |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 2984 | if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2985 | return -ENOMEM; |
| 2986 | return 0; |
| 2987 | } |
| 2988 | |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 2989 | static void if6_proc_net_exit(struct net *net) |
| 2990 | { |
| 2991 | proc_net_remove(net, "if_inet6"); |
| 2992 | } |
| 2993 | |
| 2994 | static struct pernet_operations if6_proc_net_ops = { |
| 2995 | .init = if6_proc_net_init, |
| 2996 | .exit = if6_proc_net_exit, |
| 2997 | }; |
| 2998 | |
| 2999 | int __init if6_proc_init(void) |
| 3000 | { |
| 3001 | return register_pernet_subsys(&if6_proc_net_ops); |
| 3002 | } |
| 3003 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3004 | void if6_proc_exit(void) |
| 3005 | { |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 3006 | unregister_pernet_subsys(&if6_proc_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3007 | } |
| 3008 | #endif /* CONFIG_PROC_FS */ |
| 3009 | |
Masahide NAKAMURA | 59fbb3a6 | 2007-06-26 23:56:32 -0700 | [diff] [blame] | 3010 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 3011 | /* Check if address is a home address configured on any interface. */ |
Daniel Lezcano | 389f661 | 2008-01-10 22:44:40 -0800 | [diff] [blame] | 3012 | int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr) |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 3013 | { |
| 3014 | int ret = 0; |
| 3015 | struct inet6_ifaddr * ifp; |
| 3016 | u8 hash = ipv6_addr_hash(addr); |
| 3017 | read_lock_bh(&addrconf_hash_lock); |
| 3018 | for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) { |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 3019 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
Daniel Lezcano | 389f661 | 2008-01-10 22:44:40 -0800 | [diff] [blame] | 3020 | continue; |
YOSHIFUJI Hideaki | caad295 | 2008-04-10 15:42:07 +0900 | [diff] [blame] | 3021 | if (ipv6_addr_equal(&ifp->addr, addr) && |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 3022 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
| 3023 | ret = 1; |
| 3024 | break; |
| 3025 | } |
| 3026 | } |
| 3027 | read_unlock_bh(&addrconf_hash_lock); |
| 3028 | return ret; |
| 3029 | } |
| 3030 | #endif |
| 3031 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3032 | /* |
| 3033 | * Periodic address status verification |
| 3034 | */ |
| 3035 | |
| 3036 | static void addrconf_verify(unsigned long foo) |
| 3037 | { |
| 3038 | struct inet6_ifaddr *ifp; |
| 3039 | unsigned long now, next; |
| 3040 | int i; |
| 3041 | |
| 3042 | spin_lock_bh(&addrconf_verify_lock); |
| 3043 | now = jiffies; |
| 3044 | next = now + ADDR_CHECK_FREQUENCY; |
| 3045 | |
| 3046 | del_timer(&addr_chk_timer); |
| 3047 | |
| 3048 | for (i=0; i < IN6_ADDR_HSIZE; i++) { |
| 3049 | |
| 3050 | restart: |
Yan Zheng | 5d5780d | 2005-11-20 13:42:20 -0800 | [diff] [blame] | 3051 | read_lock(&addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3052 | for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) { |
| 3053 | unsigned long age; |
| 3054 | #ifdef CONFIG_IPV6_PRIVACY |
| 3055 | unsigned long regen_advance; |
| 3056 | #endif |
| 3057 | |
| 3058 | if (ifp->flags & IFA_F_PERMANENT) |
| 3059 | continue; |
| 3060 | |
| 3061 | spin_lock(&ifp->lock); |
| 3062 | age = (now - ifp->tstamp) / HZ; |
| 3063 | |
| 3064 | #ifdef CONFIG_IPV6_PRIVACY |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3065 | regen_advance = ifp->idev->cnf.regen_max_retry * |
| 3066 | ifp->idev->cnf.dad_transmits * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3067 | ifp->idev->nd_parms->retrans_time / HZ; |
| 3068 | #endif |
| 3069 | |
YOSHIFUJI Hideaki | 8f27ebb | 2006-07-28 18:12:11 +0900 | [diff] [blame] | 3070 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
| 3071 | age >= ifp->valid_lft) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3072 | spin_unlock(&ifp->lock); |
| 3073 | in6_ifa_hold(ifp); |
Yan Zheng | 5d5780d | 2005-11-20 13:42:20 -0800 | [diff] [blame] | 3074 | read_unlock(&addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3075 | ipv6_del_addr(ifp); |
| 3076 | goto restart; |
YOSHIFUJI Hideaki | 8f27ebb | 2006-07-28 18:12:11 +0900 | [diff] [blame] | 3077 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
| 3078 | spin_unlock(&ifp->lock); |
| 3079 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3080 | } else if (age >= ifp->prefered_lft) { |
| 3081 | /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */ |
| 3082 | int deprecate = 0; |
| 3083 | |
| 3084 | if (!(ifp->flags&IFA_F_DEPRECATED)) { |
| 3085 | deprecate = 1; |
| 3086 | ifp->flags |= IFA_F_DEPRECATED; |
| 3087 | } |
| 3088 | |
| 3089 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) |
| 3090 | next = ifp->tstamp + ifp->valid_lft * HZ; |
| 3091 | |
| 3092 | spin_unlock(&ifp->lock); |
| 3093 | |
| 3094 | if (deprecate) { |
| 3095 | in6_ifa_hold(ifp); |
Yan Zheng | 5d5780d | 2005-11-20 13:42:20 -0800 | [diff] [blame] | 3096 | read_unlock(&addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3097 | |
| 3098 | ipv6_ifa_notify(0, ifp); |
| 3099 | in6_ifa_put(ifp); |
| 3100 | goto restart; |
| 3101 | } |
| 3102 | #ifdef CONFIG_IPV6_PRIVACY |
| 3103 | } else if ((ifp->flags&IFA_F_TEMPORARY) && |
| 3104 | !(ifp->flags&IFA_F_TENTATIVE)) { |
| 3105 | if (age >= ifp->prefered_lft - regen_advance) { |
| 3106 | struct inet6_ifaddr *ifpub = ifp->ifpub; |
| 3107 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) |
| 3108 | next = ifp->tstamp + ifp->prefered_lft * HZ; |
| 3109 | if (!ifp->regen_count && ifpub) { |
| 3110 | ifp->regen_count++; |
| 3111 | in6_ifa_hold(ifp); |
| 3112 | in6_ifa_hold(ifpub); |
| 3113 | spin_unlock(&ifp->lock); |
Yan Zheng | 5d5780d | 2005-11-20 13:42:20 -0800 | [diff] [blame] | 3114 | read_unlock(&addrconf_hash_lock); |
Hiroyuki YAMAMORI | 291d809 | 2005-12-23 11:24:05 -0800 | [diff] [blame] | 3115 | spin_lock(&ifpub->lock); |
| 3116 | ifpub->regen_count = 0; |
| 3117 | spin_unlock(&ifpub->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3118 | ipv6_create_tempaddr(ifpub, ifp); |
| 3119 | in6_ifa_put(ifpub); |
| 3120 | in6_ifa_put(ifp); |
| 3121 | goto restart; |
| 3122 | } |
| 3123 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) |
| 3124 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; |
| 3125 | spin_unlock(&ifp->lock); |
| 3126 | #endif |
| 3127 | } else { |
| 3128 | /* ifp->prefered_lft <= ifp->valid_lft */ |
| 3129 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) |
| 3130 | next = ifp->tstamp + ifp->prefered_lft * HZ; |
| 3131 | spin_unlock(&ifp->lock); |
| 3132 | } |
| 3133 | } |
Yan Zheng | 5d5780d | 2005-11-20 13:42:20 -0800 | [diff] [blame] | 3134 | read_unlock(&addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3135 | } |
| 3136 | |
| 3137 | addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next; |
| 3138 | add_timer(&addr_chk_timer); |
| 3139 | spin_unlock_bh(&addrconf_verify_lock); |
| 3140 | } |
| 3141 | |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3142 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) |
| 3143 | { |
| 3144 | struct in6_addr *pfx = NULL; |
| 3145 | |
| 3146 | if (addr) |
| 3147 | pfx = nla_data(addr); |
| 3148 | |
| 3149 | if (local) { |
| 3150 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) |
| 3151 | pfx = NULL; |
| 3152 | else |
| 3153 | pfx = nla_data(local); |
| 3154 | } |
| 3155 | |
| 3156 | return pfx; |
| 3157 | } |
| 3158 | |
Patrick McHardy | ef7c79e | 2007-06-05 12:38:30 -0700 | [diff] [blame] | 3159 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3160 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
| 3161 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, |
| 3162 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, |
| 3163 | }; |
| 3164 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3165 | static int |
| 3166 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
| 3167 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 3168 | struct net *net = sock_net(skb->sk); |
Thomas Graf | b933f71 | 2006-09-18 00:10:19 -0700 | [diff] [blame] | 3169 | struct ifaddrmsg *ifm; |
| 3170 | struct nlattr *tb[IFA_MAX+1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3171 | struct in6_addr *pfx; |
Thomas Graf | b933f71 | 2006-09-18 00:10:19 -0700 | [diff] [blame] | 3172 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3173 | |
Thomas Graf | b933f71 | 2006-09-18 00:10:19 -0700 | [diff] [blame] | 3174 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
| 3175 | if (err < 0) |
| 3176 | return err; |
| 3177 | |
| 3178 | ifm = nlmsg_data(nlh); |
| 3179 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3180 | if (pfx == NULL) |
| 3181 | return -EINVAL; |
| 3182 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 3183 | return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3184 | } |
| 3185 | |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 3186 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
| 3187 | u32 prefered_lft, u32 valid_lft) |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3188 | { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 3189 | u32 flags; |
| 3190 | clock_t expires; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 3191 | unsigned long timeout; |
YOSHIFUJI Hideaki | 46d4804 | 2007-02-07 20:36:26 +0900 | [diff] [blame] | 3192 | |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3193 | if (!valid_lft || (prefered_lft > valid_lft)) |
| 3194 | return -EINVAL; |
| 3195 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 3196 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
| 3197 | if (addrconf_finite_timeout(timeout)) { |
| 3198 | expires = jiffies_to_clock_t(timeout * HZ); |
| 3199 | valid_lft = timeout; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 3200 | flags = RTF_EXPIRES; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 3201 | } else { |
| 3202 | expires = 0; |
| 3203 | flags = 0; |
| 3204 | ifa_flags |= IFA_F_PERMANENT; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 3205 | } |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3206 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 3207 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
| 3208 | if (addrconf_finite_timeout(timeout)) { |
| 3209 | if (timeout == 0) |
| 3210 | ifa_flags |= IFA_F_DEPRECATED; |
| 3211 | prefered_lft = timeout; |
| 3212 | } |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3213 | |
| 3214 | spin_lock_bh(&ifp->lock); |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 3215 | 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] | 3216 | ifp->tstamp = jiffies; |
| 3217 | ifp->valid_lft = valid_lft; |
| 3218 | ifp->prefered_lft = prefered_lft; |
| 3219 | |
| 3220 | spin_unlock_bh(&ifp->lock); |
| 3221 | if (!(ifp->flags&IFA_F_TENTATIVE)) |
| 3222 | ipv6_ifa_notify(0, ifp); |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3223 | |
YOSHIFUJI Hideaki | 46d4804 | 2007-02-07 20:36:26 +0900 | [diff] [blame] | 3224 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 3225 | expires, flags); |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3226 | addrconf_verify(0); |
| 3227 | |
| 3228 | return 0; |
| 3229 | } |
| 3230 | |
| 3231 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3232 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
| 3233 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 3234 | struct net *net = sock_net(skb->sk); |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3235 | struct ifaddrmsg *ifm; |
| 3236 | struct nlattr *tb[IFA_MAX+1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3237 | struct in6_addr *pfx; |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 3238 | struct inet6_ifaddr *ifa; |
| 3239 | struct net_device *dev; |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 3240 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
| 3241 | u8 ifa_flags; |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3242 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3243 | |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3244 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
| 3245 | if (err < 0) |
| 3246 | return err; |
| 3247 | |
| 3248 | ifm = nlmsg_data(nlh); |
| 3249 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3250 | if (pfx == NULL) |
| 3251 | return -EINVAL; |
| 3252 | |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3253 | if (tb[IFA_CACHEINFO]) { |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 3254 | struct ifa_cacheinfo *ci; |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3255 | |
| 3256 | ci = nla_data(tb[IFA_CACHEINFO]); |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 3257 | valid_lft = ci->ifa_valid; |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3258 | preferred_lft = ci->ifa_prefered; |
| 3259 | } else { |
| 3260 | preferred_lft = INFINITY_LIFE_TIME; |
| 3261 | valid_lft = INFINITY_LIFE_TIME; |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 3262 | } |
| 3263 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 3264 | dev = __dev_get_by_index(net, ifm->ifa_index); |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 3265 | if (dev == NULL) |
| 3266 | return -ENODEV; |
| 3267 | |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 3268 | /* We ignore other flags so far. */ |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 3269 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 3270 | |
Daniel Lezcano | 1cab3da | 2008-01-10 22:44:09 -0800 | [diff] [blame] | 3271 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 3272 | if (ifa == NULL) { |
| 3273 | /* |
| 3274 | * It would be best to check for !NLM_F_CREATE here but |
| 3275 | * userspace alreay relies on not having to provide this. |
| 3276 | */ |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 3277 | return inet6_addr_add(net, ifm->ifa_index, pfx, |
| 3278 | ifm->ifa_prefixlen, ifa_flags, |
| 3279 | preferred_lft, valid_lft); |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3280 | } |
| 3281 | |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 3282 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
| 3283 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) |
| 3284 | err = -EEXIST; |
| 3285 | else |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 3286 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 3287 | |
| 3288 | in6_ifa_put(ifa); |
| 3289 | |
| 3290 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3291 | } |
| 3292 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3293 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
| 3294 | u8 scope, int ifindex) |
| 3295 | { |
| 3296 | struct ifaddrmsg *ifm; |
| 3297 | |
| 3298 | ifm = nlmsg_data(nlh); |
| 3299 | ifm->ifa_family = AF_INET6; |
| 3300 | ifm->ifa_prefixlen = prefixlen; |
| 3301 | ifm->ifa_flags = flags; |
| 3302 | ifm->ifa_scope = scope; |
| 3303 | ifm->ifa_index = ifindex; |
| 3304 | } |
| 3305 | |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3306 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
| 3307 | unsigned long tstamp, u32 preferred, u32 valid) |
| 3308 | { |
| 3309 | struct ifa_cacheinfo ci; |
| 3310 | |
| 3311 | ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100 |
| 3312 | + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); |
| 3313 | ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100 |
| 3314 | + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); |
| 3315 | ci.ifa_prefered = preferred; |
| 3316 | ci.ifa_valid = valid; |
| 3317 | |
| 3318 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); |
| 3319 | } |
| 3320 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3321 | static inline int rt_scope(int ifa_scope) |
| 3322 | { |
| 3323 | if (ifa_scope & IFA_HOST) |
| 3324 | return RT_SCOPE_HOST; |
| 3325 | else if (ifa_scope & IFA_LINK) |
| 3326 | return RT_SCOPE_LINK; |
| 3327 | else if (ifa_scope & IFA_SITE) |
| 3328 | return RT_SCOPE_SITE; |
| 3329 | else |
| 3330 | return RT_SCOPE_UNIVERSE; |
| 3331 | } |
| 3332 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3333 | static inline int inet6_ifaddr_msgsize(void) |
| 3334 | { |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 3335 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
| 3336 | + nla_total_size(16) /* IFA_ADDRESS */ |
| 3337 | + nla_total_size(sizeof(struct ifa_cacheinfo)); |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3338 | } |
YOSHIFUJI Hideaki | c5396a3 | 2006-06-17 22:48:48 -0700 | [diff] [blame] | 3339 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3340 | 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] | 3341 | u32 pid, u32 seq, int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3342 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3343 | struct nlmsghdr *nlh; |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3344 | u32 preferred, valid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3345 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3346 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
| 3347 | if (nlh == NULL) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3348 | return -EMSGSIZE; |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3349 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3350 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
| 3351 | ifa->idev->dev->ifindex); |
| 3352 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3353 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3354 | preferred = ifa->prefered_lft; |
| 3355 | valid = ifa->valid_lft; |
| 3356 | if (preferred != INFINITY_LIFE_TIME) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3357 | long tval = (jiffies - ifa->tstamp)/HZ; |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3358 | preferred -= tval; |
| 3359 | if (valid != INFINITY_LIFE_TIME) |
| 3360 | valid -= tval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3361 | } |
| 3362 | } else { |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3363 | preferred = INFINITY_LIFE_TIME; |
| 3364 | valid = INFINITY_LIFE_TIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3365 | } |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3366 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3367 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3368 | put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { |
| 3369 | nlmsg_cancel(skb, nlh); |
| 3370 | return -EMSGSIZE; |
| 3371 | } |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3372 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3373 | return nlmsg_end(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3374 | } |
| 3375 | |
| 3376 | 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] | 3377 | u32 pid, u32 seq, int event, u16 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3378 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3379 | struct nlmsghdr *nlh; |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3380 | u8 scope = RT_SCOPE_UNIVERSE; |
| 3381 | int ifindex = ifmca->idev->dev->ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3382 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3383 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) |
| 3384 | scope = RT_SCOPE_SITE; |
| 3385 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3386 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
| 3387 | if (nlh == NULL) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3388 | return -EMSGSIZE; |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3389 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3390 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3391 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || |
| 3392 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3393 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
| 3394 | nlmsg_cancel(skb, nlh); |
| 3395 | return -EMSGSIZE; |
| 3396 | } |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3397 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3398 | return nlmsg_end(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3399 | } |
| 3400 | |
| 3401 | 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] | 3402 | u32 pid, u32 seq, int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3403 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3404 | struct nlmsghdr *nlh; |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3405 | u8 scope = RT_SCOPE_UNIVERSE; |
| 3406 | int ifindex = ifaca->aca_idev->dev->ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3407 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3408 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) |
| 3409 | scope = RT_SCOPE_SITE; |
| 3410 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3411 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
| 3412 | if (nlh == NULL) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3413 | return -EMSGSIZE; |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3414 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3415 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3416 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || |
| 3417 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3418 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
| 3419 | nlmsg_cancel(skb, nlh); |
| 3420 | return -EMSGSIZE; |
| 3421 | } |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3422 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3423 | return nlmsg_end(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3424 | } |
| 3425 | |
| 3426 | enum addr_type_t |
| 3427 | { |
| 3428 | UNICAST_ADDR, |
| 3429 | MULTICAST_ADDR, |
| 3430 | ANYCAST_ADDR, |
| 3431 | }; |
| 3432 | |
| 3433 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, |
| 3434 | enum addr_type_t type) |
| 3435 | { |
| 3436 | int idx, ip_idx; |
| 3437 | int s_idx, s_ip_idx; |
| 3438 | int err = 1; |
| 3439 | struct net_device *dev; |
| 3440 | struct inet6_dev *idev = NULL; |
| 3441 | struct inet6_ifaddr *ifa; |
| 3442 | struct ifmcaddr6 *ifmca; |
| 3443 | struct ifacaddr6 *ifaca; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 3444 | struct net *net = sock_net(skb->sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3445 | |
| 3446 | s_idx = cb->args[0]; |
| 3447 | s_ip_idx = ip_idx = cb->args[1]; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3448 | |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 3449 | idx = 0; |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 3450 | for_each_netdev(net, dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3451 | if (idx < s_idx) |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 3452 | goto cont; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3453 | if (idx > s_idx) |
| 3454 | s_ip_idx = 0; |
| 3455 | ip_idx = 0; |
| 3456 | if ((idev = in6_dev_get(dev)) == NULL) |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 3457 | goto cont; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3458 | read_lock_bh(&idev->lock); |
| 3459 | switch (type) { |
| 3460 | case UNICAST_ADDR: |
YOSHIFUJI Hideaki | ae9cda5 | 2005-06-28 13:00:30 -0700 | [diff] [blame] | 3461 | /* unicast address incl. temp addr */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3462 | for (ifa = idev->addr_list; ifa; |
| 3463 | ifa = ifa->if_next, ip_idx++) { |
| 3464 | if (ip_idx < s_ip_idx) |
| 3465 | continue; |
YOSHIFUJI Hideaki | 5d5619b | 2008-01-22 17:29:40 +0900 | [diff] [blame] | 3466 | err = inet6_fill_ifaddr(skb, ifa, |
| 3467 | NETLINK_CB(cb->skb).pid, |
| 3468 | cb->nlh->nlmsg_seq, |
| 3469 | RTM_NEWADDR, |
| 3470 | NLM_F_MULTI); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3471 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3472 | break; |
| 3473 | case MULTICAST_ADDR: |
| 3474 | /* multicast address */ |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3475 | for (ifmca = idev->mc_list; ifmca; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3476 | ifmca = ifmca->next, ip_idx++) { |
| 3477 | if (ip_idx < s_ip_idx) |
| 3478 | continue; |
YOSHIFUJI Hideaki | 5d5619b | 2008-01-22 17:29:40 +0900 | [diff] [blame] | 3479 | err = inet6_fill_ifmcaddr(skb, ifmca, |
| 3480 | NETLINK_CB(cb->skb).pid, |
| 3481 | cb->nlh->nlmsg_seq, |
| 3482 | RTM_GETMULTICAST, |
| 3483 | NLM_F_MULTI); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3484 | } |
| 3485 | break; |
| 3486 | case ANYCAST_ADDR: |
| 3487 | /* anycast address */ |
| 3488 | for (ifaca = idev->ac_list; ifaca; |
| 3489 | ifaca = ifaca->aca_next, ip_idx++) { |
| 3490 | if (ip_idx < s_ip_idx) |
| 3491 | continue; |
YOSHIFUJI Hideaki | 5d5619b | 2008-01-22 17:29:40 +0900 | [diff] [blame] | 3492 | err = inet6_fill_ifacaddr(skb, ifaca, |
| 3493 | NETLINK_CB(cb->skb).pid, |
| 3494 | cb->nlh->nlmsg_seq, |
| 3495 | RTM_GETANYCAST, |
| 3496 | NLM_F_MULTI); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3497 | } |
| 3498 | break; |
| 3499 | default: |
| 3500 | break; |
| 3501 | } |
| 3502 | read_unlock_bh(&idev->lock); |
| 3503 | in6_dev_put(idev); |
YOSHIFUJI Hideaki | 5d5619b | 2008-01-22 17:29:40 +0900 | [diff] [blame] | 3504 | |
| 3505 | if (err <= 0) |
| 3506 | break; |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 3507 | cont: |
| 3508 | idx++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3509 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3510 | cb->args[0] = idx; |
| 3511 | cb->args[1] = ip_idx; |
| 3512 | return skb->len; |
| 3513 | } |
| 3514 | |
| 3515 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) |
| 3516 | { |
| 3517 | enum addr_type_t type = UNICAST_ADDR; |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 3518 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3519 | return inet6_dump_addr(skb, cb, type); |
| 3520 | } |
| 3521 | |
| 3522 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) |
| 3523 | { |
| 3524 | enum addr_type_t type = MULTICAST_ADDR; |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 3525 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3526 | return inet6_dump_addr(skb, cb, type); |
| 3527 | } |
| 3528 | |
| 3529 | |
| 3530 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) |
| 3531 | { |
| 3532 | enum addr_type_t type = ANYCAST_ADDR; |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 3533 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3534 | return inet6_dump_addr(skb, cb, type); |
| 3535 | } |
| 3536 | |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 3537 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh, |
| 3538 | void *arg) |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3539 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 3540 | struct net *net = sock_net(in_skb->sk); |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 3541 | struct ifaddrmsg *ifm; |
| 3542 | struct nlattr *tb[IFA_MAX+1]; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3543 | struct in6_addr *addr = NULL; |
| 3544 | struct net_device *dev = NULL; |
| 3545 | struct inet6_ifaddr *ifa; |
| 3546 | struct sk_buff *skb; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3547 | int err; |
| 3548 | |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 3549 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
| 3550 | if (err < 0) |
| 3551 | goto errout; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3552 | |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 3553 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); |
| 3554 | if (addr == NULL) { |
| 3555 | err = -EINVAL; |
| 3556 | goto errout; |
| 3557 | } |
| 3558 | |
| 3559 | ifm = nlmsg_data(nlh); |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3560 | if (ifm->ifa_index) |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 3561 | dev = __dev_get_by_index(net, ifm->ifa_index); |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3562 | |
Daniel Lezcano | 1cab3da | 2008-01-10 22:44:09 -0800 | [diff] [blame] | 3563 | if ((ifa = ipv6_get_ifaddr(net, addr, dev, 1)) == NULL) { |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 3564 | err = -EADDRNOTAVAIL; |
| 3565 | goto errout; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3566 | } |
| 3567 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3568 | if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) { |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 3569 | err = -ENOBUFS; |
| 3570 | goto errout_ifa; |
| 3571 | } |
| 3572 | |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3573 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, |
| 3574 | nlh->nlmsg_seq, RTM_NEWADDR, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3575 | if (err < 0) { |
| 3576 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ |
| 3577 | WARN_ON(err == -EMSGSIZE); |
| 3578 | kfree_skb(skb); |
| 3579 | goto errout_ifa; |
| 3580 | } |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 3581 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid); |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 3582 | errout_ifa: |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3583 | in6_ifa_put(ifa); |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 3584 | errout: |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3585 | return err; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3586 | } |
| 3587 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3588 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
| 3589 | { |
| 3590 | struct sk_buff *skb; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 3591 | struct net *net = dev_net(ifa->idev->dev); |
Thomas Graf | 5d62026 | 2006-08-15 00:35:02 -0700 | [diff] [blame] | 3592 | int err = -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3593 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3594 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
Thomas Graf | 5d62026 | 2006-08-15 00:35:02 -0700 | [diff] [blame] | 3595 | if (skb == NULL) |
| 3596 | goto errout; |
| 3597 | |
| 3598 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3599 | if (err < 0) { |
| 3600 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ |
| 3601 | WARN_ON(err == -EMSGSIZE); |
| 3602 | kfree_skb(skb); |
| 3603 | goto errout; |
| 3604 | } |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 3605 | err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
Thomas Graf | 5d62026 | 2006-08-15 00:35:02 -0700 | [diff] [blame] | 3606 | errout: |
| 3607 | if (err < 0) |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 3608 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3609 | } |
| 3610 | |
Dave Jones | b6f99a2 | 2007-03-22 12:27:49 -0700 | [diff] [blame] | 3611 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3612 | __s32 *array, int bytes) |
| 3613 | { |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3614 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
| 3615 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3616 | memset(array, 0, bytes); |
| 3617 | array[DEVCONF_FORWARDING] = cnf->forwarding; |
| 3618 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; |
| 3619 | array[DEVCONF_MTU6] = cnf->mtu6; |
| 3620 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; |
| 3621 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; |
| 3622 | array[DEVCONF_AUTOCONF] = cnf->autoconf; |
| 3623 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; |
| 3624 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; |
| 3625 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; |
| 3626 | array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; |
| 3627 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; |
| 3628 | #ifdef CONFIG_IPV6_PRIVACY |
| 3629 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; |
| 3630 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; |
| 3631 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; |
| 3632 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; |
| 3633 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; |
| 3634 | #endif |
| 3635 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 3636 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 3637 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 3638 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 3639 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; |
YOSHIFUJI Hideaki | 52e1635 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 3640 | array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval; |
Neil Horman | fa03ef3 | 2007-01-30 14:30:10 -0800 | [diff] [blame] | 3641 | #ifdef CONFIG_IPV6_ROUTE_INFO |
YOSHIFUJI Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 3642 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
| 3643 | #endif |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 3644 | #endif |
YOSHIFUJI Hideaki | fbea49e | 2006-09-22 14:43:49 -0700 | [diff] [blame] | 3645 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 3646 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 3647 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 3648 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; |
| 3649 | #endif |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 3650 | #ifdef CONFIG_IPV6_MROUTE |
| 3651 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; |
| 3652 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3653 | } |
| 3654 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 3655 | static inline size_t inet6_if_nlmsg_size(void) |
| 3656 | { |
| 3657 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) |
| 3658 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ |
| 3659 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ |
| 3660 | + nla_total_size(4) /* IFLA_MTU */ |
| 3661 | + nla_total_size(4) /* IFLA_LINK */ |
| 3662 | + nla_total_size( /* IFLA_PROTINFO */ |
| 3663 | nla_total_size(4) /* IFLA_INET6_FLAGS */ |
| 3664 | + nla_total_size(sizeof(struct ifla_cacheinfo)) |
| 3665 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 3666 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ |
| 3667 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 3668 | ); |
| 3669 | } |
YOSHIFUJI Hideaki | c5396a3 | 2006-06-17 22:48:48 -0700 | [diff] [blame] | 3670 | |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 3671 | static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items, |
| 3672 | int bytes) |
| 3673 | { |
| 3674 | int i; |
| 3675 | int pad = bytes - sizeof(u64) * items; |
| 3676 | BUG_ON(pad < 0); |
| 3677 | |
| 3678 | /* Use put_unaligned() because stats may not be aligned for u64. */ |
| 3679 | put_unaligned(items, &stats[0]); |
| 3680 | for (i = 1; i < items; i++) |
| 3681 | put_unaligned(snmp_fold_field(mib, i), &stats[i]); |
| 3682 | |
| 3683 | memset(&stats[items], 0, pad); |
| 3684 | } |
| 3685 | |
| 3686 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, |
| 3687 | int bytes) |
| 3688 | { |
| 3689 | switch(attrtype) { |
| 3690 | case IFLA_INET6_STATS: |
| 3691 | __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes); |
| 3692 | break; |
| 3693 | case IFLA_INET6_ICMP6STATS: |
| 3694 | __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes); |
| 3695 | break; |
| 3696 | } |
| 3697 | } |
| 3698 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3699 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
Jamal Hadi Salim | b6544c0 | 2005-06-18 22:54:12 -0700 | [diff] [blame] | 3700 | u32 pid, u32 seq, int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3701 | { |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3702 | struct net_device *dev = idev->dev; |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 3703 | struct nlattr *nla; |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3704 | struct ifinfomsg *hdr; |
| 3705 | struct nlmsghdr *nlh; |
| 3706 | void *protoinfo; |
| 3707 | struct ifla_cacheinfo ci; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3708 | |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3709 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); |
| 3710 | if (nlh == NULL) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3711 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3712 | |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3713 | hdr = nlmsg_data(nlh); |
| 3714 | hdr->ifi_family = AF_INET6; |
| 3715 | hdr->__ifi_pad = 0; |
| 3716 | hdr->ifi_type = dev->type; |
| 3717 | hdr->ifi_index = dev->ifindex; |
| 3718 | hdr->ifi_flags = dev_get_flags(dev); |
| 3719 | hdr->ifi_change = 0; |
| 3720 | |
| 3721 | NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3722 | |
| 3723 | if (dev->addr_len) |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3724 | NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3725 | |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3726 | NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3727 | if (dev->ifindex != dev->iflink) |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3728 | NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3729 | |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3730 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
| 3731 | if (protoinfo == NULL) |
| 3732 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3733 | |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3734 | NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3735 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3736 | ci.max_reasm_len = IPV6_MAXPLEN; |
| 3737 | ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 |
| 3738 | + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); |
| 3739 | ci.reachable_time = idev->nd_parms->reachable_time; |
| 3740 | ci.retrans_time = idev->nd_parms->retrans_time; |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3741 | NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); |
| 3742 | |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 3743 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
| 3744 | if (nla == NULL) |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3745 | goto nla_put_failure; |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 3746 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3747 | |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 3748 | /* XXX - MC not implemented */ |
| 3749 | |
| 3750 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); |
| 3751 | if (nla == NULL) |
| 3752 | goto nla_put_failure; |
| 3753 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); |
| 3754 | |
| 3755 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); |
| 3756 | if (nla == NULL) |
| 3757 | goto nla_put_failure; |
| 3758 | 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] | 3759 | |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3760 | nla_nest_end(skb, protoinfo); |
| 3761 | return nlmsg_end(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3762 | |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3763 | nla_put_failure: |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3764 | nlmsg_cancel(skb, nlh); |
| 3765 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3766 | } |
| 3767 | |
| 3768 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) |
| 3769 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 3770 | struct net *net = sock_net(skb->sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3771 | int idx, err; |
| 3772 | int s_idx = cb->args[0]; |
| 3773 | struct net_device *dev; |
| 3774 | struct inet6_dev *idev; |
| 3775 | |
| 3776 | read_lock(&dev_base_lock); |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 3777 | idx = 0; |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 3778 | for_each_netdev(net, dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3779 | if (idx < s_idx) |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 3780 | goto cont; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3781 | if ((idev = in6_dev_get(dev)) == NULL) |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 3782 | goto cont; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3783 | err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid, |
Jamal Hadi Salim | b6544c0 | 2005-06-18 22:54:12 -0700 | [diff] [blame] | 3784 | cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3785 | in6_dev_put(idev); |
| 3786 | if (err <= 0) |
| 3787 | break; |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 3788 | cont: |
| 3789 | idx++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3790 | } |
| 3791 | read_unlock(&dev_base_lock); |
| 3792 | cb->args[0] = idx; |
| 3793 | |
| 3794 | return skb->len; |
| 3795 | } |
| 3796 | |
| 3797 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) |
| 3798 | { |
| 3799 | struct sk_buff *skb; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 3800 | struct net *net = dev_net(idev->dev); |
Thomas Graf | 8d7a76c | 2006-08-15 00:35:47 -0700 | [diff] [blame] | 3801 | int err = -ENOBUFS; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3802 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 3803 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
Thomas Graf | 8d7a76c | 2006-08-15 00:35:47 -0700 | [diff] [blame] | 3804 | if (skb == NULL) |
| 3805 | goto errout; |
| 3806 | |
| 3807 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3808 | if (err < 0) { |
| 3809 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ |
| 3810 | WARN_ON(err == -EMSGSIZE); |
| 3811 | kfree_skb(skb); |
| 3812 | goto errout; |
| 3813 | } |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 3814 | err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
Thomas Graf | 8d7a76c | 2006-08-15 00:35:47 -0700 | [diff] [blame] | 3815 | errout: |
| 3816 | if (err < 0) |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 3817 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3818 | } |
| 3819 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 3820 | static inline size_t inet6_prefix_nlmsg_size(void) |
| 3821 | { |
| 3822 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) |
| 3823 | + nla_total_size(sizeof(struct in6_addr)) |
| 3824 | + nla_total_size(sizeof(struct prefix_cacheinfo)); |
| 3825 | } |
YOSHIFUJI Hideaki | c5396a3 | 2006-06-17 22:48:48 -0700 | [diff] [blame] | 3826 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3827 | 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] | 3828 | struct prefix_info *pinfo, u32 pid, u32 seq, |
| 3829 | int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3830 | { |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 3831 | struct prefixmsg *pmsg; |
| 3832 | struct nlmsghdr *nlh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3833 | struct prefix_cacheinfo ci; |
| 3834 | |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 3835 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags); |
| 3836 | if (nlh == NULL) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3837 | return -EMSGSIZE; |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 3838 | |
| 3839 | pmsg = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3840 | pmsg->prefix_family = AF_INET6; |
Patrick McHardy | 8a47077 | 2005-06-28 12:56:45 -0700 | [diff] [blame] | 3841 | pmsg->prefix_pad1 = 0; |
| 3842 | pmsg->prefix_pad2 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3843 | pmsg->prefix_ifindex = idev->dev->ifindex; |
| 3844 | pmsg->prefix_len = pinfo->prefix_len; |
| 3845 | pmsg->prefix_type = pinfo->type; |
Patrick McHardy | 8a47077 | 2005-06-28 12:56:45 -0700 | [diff] [blame] | 3846 | pmsg->prefix_pad3 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3847 | pmsg->prefix_flags = 0; |
| 3848 | if (pinfo->onlink) |
| 3849 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; |
| 3850 | if (pinfo->autoconf) |
| 3851 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; |
| 3852 | |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 3853 | NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3854 | |
| 3855 | ci.preferred_time = ntohl(pinfo->prefered); |
| 3856 | ci.valid_time = ntohl(pinfo->valid); |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 3857 | NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3858 | |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 3859 | return nlmsg_end(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3860 | |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 3861 | nla_put_failure: |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3862 | nlmsg_cancel(skb, nlh); |
| 3863 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3864 | } |
| 3865 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3866 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3867 | struct prefix_info *pinfo) |
| 3868 | { |
| 3869 | struct sk_buff *skb; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 3870 | struct net *net = dev_net(idev->dev); |
Thomas Graf | 8c384bfa | 2006-08-15 00:36:07 -0700 | [diff] [blame] | 3871 | int err = -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3872 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 3873 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
Thomas Graf | 8c384bfa | 2006-08-15 00:36:07 -0700 | [diff] [blame] | 3874 | if (skb == NULL) |
| 3875 | goto errout; |
| 3876 | |
| 3877 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3878 | if (err < 0) { |
| 3879 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ |
| 3880 | WARN_ON(err == -EMSGSIZE); |
| 3881 | kfree_skb(skb); |
| 3882 | goto errout; |
| 3883 | } |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 3884 | err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
Thomas Graf | 8c384bfa | 2006-08-15 00:36:07 -0700 | [diff] [blame] | 3885 | errout: |
| 3886 | if (err < 0) |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 3887 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3888 | } |
| 3889 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3890 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
| 3891 | { |
| 3892 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); |
| 3893 | |
| 3894 | switch (event) { |
| 3895 | case RTM_NEWADDR: |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 3896 | /* |
| 3897 | * If the address was optimistic |
| 3898 | * we inserted the route at the start of |
| 3899 | * our DAD process, so we don't need |
| 3900 | * to do it again |
| 3901 | */ |
| 3902 | if (!(ifp->rt->rt6i_node)) |
| 3903 | ip6_ins_rt(ifp->rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3904 | if (ifp->idev->cnf.forwarding) |
| 3905 | addrconf_join_anycast(ifp); |
| 3906 | break; |
| 3907 | case RTM_DELADDR: |
| 3908 | if (ifp->idev->cnf.forwarding) |
| 3909 | addrconf_leave_anycast(ifp); |
| 3910 | addrconf_leave_solict(ifp->idev, &ifp->addr); |
| 3911 | dst_hold(&ifp->rt->u.dst); |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 3912 | if (ip6_del_rt(ifp->rt)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3913 | dst_free(&ifp->rt->u.dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3914 | break; |
| 3915 | } |
| 3916 | } |
| 3917 | |
| 3918 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
| 3919 | { |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 3920 | rcu_read_lock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3921 | if (likely(ifp->idev->dead == 0)) |
| 3922 | __ipv6_ifa_notify(event, ifp); |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 3923 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3924 | } |
| 3925 | |
| 3926 | #ifdef CONFIG_SYSCTL |
| 3927 | |
| 3928 | static |
| 3929 | int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp, |
| 3930 | void __user *buffer, size_t *lenp, loff_t *ppos) |
| 3931 | { |
| 3932 | int *valp = ctl->data; |
| 3933 | int val = *valp; |
| 3934 | int ret; |
| 3935 | |
| 3936 | ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); |
| 3937 | |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 3938 | if (write) |
| 3939 | addrconf_fixup_forwarding(ctl, valp, val); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3940 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3941 | } |
| 3942 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3943 | static int addrconf_sysctl_forward_strategy(ctl_table *table, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3944 | int __user *name, int nlen, |
| 3945 | void __user *oldval, |
| 3946 | size_t __user *oldlenp, |
Alexey Dobriyan | 1f29bcd | 2006-12-10 02:19:10 -0800 | [diff] [blame] | 3947 | void __user *newval, size_t newlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3948 | { |
| 3949 | int *valp = table->data; |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 3950 | int val = *valp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3951 | int new; |
| 3952 | |
| 3953 | if (!newval || !newlen) |
| 3954 | return 0; |
| 3955 | if (newlen != sizeof(int)) |
| 3956 | return -EINVAL; |
| 3957 | if (get_user(new, (int __user *)newval)) |
| 3958 | return -EFAULT; |
| 3959 | if (new == *valp) |
| 3960 | return 0; |
| 3961 | if (oldval && oldlenp) { |
| 3962 | size_t len; |
| 3963 | if (get_user(len, oldlenp)) |
| 3964 | return -EFAULT; |
| 3965 | if (len) { |
| 3966 | if (len > table->maxlen) |
| 3967 | len = table->maxlen; |
| 3968 | if (copy_to_user(oldval, valp, len)) |
| 3969 | return -EFAULT; |
| 3970 | if (put_user(len, oldlenp)) |
| 3971 | return -EFAULT; |
| 3972 | } |
| 3973 | } |
| 3974 | |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 3975 | *valp = new; |
| 3976 | addrconf_fixup_forwarding(table, valp, val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3977 | return 1; |
| 3978 | } |
| 3979 | |
| 3980 | static struct addrconf_sysctl_table |
| 3981 | { |
| 3982 | struct ctl_table_header *sysctl_header; |
YOSHIFUJI Hideaki | f6a07b2 | 2008-03-25 00:25:11 +0900 | [diff] [blame] | 3983 | ctl_table addrconf_vars[DEVCONF_MAX+1]; |
Pavel Emelyanov | 1dab622 | 2007-12-02 00:59:38 +1100 | [diff] [blame] | 3984 | char *dev_name; |
Brian Haley | ab32ea5 | 2006-09-22 14:15:41 -0700 | [diff] [blame] | 3985 | } addrconf_sysctl __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3986 | .sysctl_header = NULL, |
| 3987 | .addrconf_vars = { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3988 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3989 | .ctl_name = NET_IPV6_FORWARDING, |
| 3990 | .procname = "forwarding", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3991 | .data = &ipv6_devconf.forwarding, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3992 | .maxlen = sizeof(int), |
| 3993 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3994 | .proc_handler = &addrconf_sysctl_forward, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3995 | .strategy = &addrconf_sysctl_forward_strategy, |
| 3996 | }, |
| 3997 | { |
| 3998 | .ctl_name = NET_IPV6_HOP_LIMIT, |
| 3999 | .procname = "hop_limit", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4000 | .data = &ipv6_devconf.hop_limit, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4001 | .maxlen = sizeof(int), |
| 4002 | .mode = 0644, |
| 4003 | .proc_handler = proc_dointvec, |
| 4004 | }, |
| 4005 | { |
| 4006 | .ctl_name = NET_IPV6_MTU, |
| 4007 | .procname = "mtu", |
| 4008 | .data = &ipv6_devconf.mtu6, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4009 | .maxlen = sizeof(int), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4010 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4011 | .proc_handler = &proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4012 | }, |
| 4013 | { |
| 4014 | .ctl_name = NET_IPV6_ACCEPT_RA, |
| 4015 | .procname = "accept_ra", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4016 | .data = &ipv6_devconf.accept_ra, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4017 | .maxlen = sizeof(int), |
| 4018 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4019 | .proc_handler = &proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4020 | }, |
| 4021 | { |
| 4022 | .ctl_name = NET_IPV6_ACCEPT_REDIRECTS, |
| 4023 | .procname = "accept_redirects", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4024 | .data = &ipv6_devconf.accept_redirects, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4025 | .maxlen = sizeof(int), |
| 4026 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4027 | .proc_handler = &proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4028 | }, |
| 4029 | { |
| 4030 | .ctl_name = NET_IPV6_AUTOCONF, |
| 4031 | .procname = "autoconf", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4032 | .data = &ipv6_devconf.autoconf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4033 | .maxlen = sizeof(int), |
| 4034 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4035 | .proc_handler = &proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4036 | }, |
| 4037 | { |
| 4038 | .ctl_name = NET_IPV6_DAD_TRANSMITS, |
| 4039 | .procname = "dad_transmits", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4040 | .data = &ipv6_devconf.dad_transmits, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4041 | .maxlen = sizeof(int), |
| 4042 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4043 | .proc_handler = &proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4044 | }, |
| 4045 | { |
| 4046 | .ctl_name = NET_IPV6_RTR_SOLICITS, |
| 4047 | .procname = "router_solicitations", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4048 | .data = &ipv6_devconf.rtr_solicits, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4049 | .maxlen = sizeof(int), |
| 4050 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4051 | .proc_handler = &proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4052 | }, |
| 4053 | { |
| 4054 | .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL, |
| 4055 | .procname = "router_solicitation_interval", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4056 | .data = &ipv6_devconf.rtr_solicit_interval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4057 | .maxlen = sizeof(int), |
| 4058 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4059 | .proc_handler = &proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4060 | .strategy = &sysctl_jiffies, |
| 4061 | }, |
| 4062 | { |
| 4063 | .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY, |
| 4064 | .procname = "router_solicitation_delay", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4065 | .data = &ipv6_devconf.rtr_solicit_delay, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4066 | .maxlen = sizeof(int), |
| 4067 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4068 | .proc_handler = &proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4069 | .strategy = &sysctl_jiffies, |
| 4070 | }, |
| 4071 | { |
| 4072 | .ctl_name = NET_IPV6_FORCE_MLD_VERSION, |
| 4073 | .procname = "force_mld_version", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4074 | .data = &ipv6_devconf.force_mld_version, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4075 | .maxlen = sizeof(int), |
| 4076 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4077 | .proc_handler = &proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4078 | }, |
| 4079 | #ifdef CONFIG_IPV6_PRIVACY |
| 4080 | { |
| 4081 | .ctl_name = NET_IPV6_USE_TEMPADDR, |
| 4082 | .procname = "use_tempaddr", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4083 | .data = &ipv6_devconf.use_tempaddr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4084 | .maxlen = sizeof(int), |
| 4085 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4086 | .proc_handler = &proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4087 | }, |
| 4088 | { |
| 4089 | .ctl_name = NET_IPV6_TEMP_VALID_LFT, |
| 4090 | .procname = "temp_valid_lft", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4091 | .data = &ipv6_devconf.temp_valid_lft, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4092 | .maxlen = sizeof(int), |
| 4093 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4094 | .proc_handler = &proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4095 | }, |
| 4096 | { |
| 4097 | .ctl_name = NET_IPV6_TEMP_PREFERED_LFT, |
| 4098 | .procname = "temp_prefered_lft", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4099 | .data = &ipv6_devconf.temp_prefered_lft, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4100 | .maxlen = sizeof(int), |
| 4101 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4102 | .proc_handler = &proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4103 | }, |
| 4104 | { |
| 4105 | .ctl_name = NET_IPV6_REGEN_MAX_RETRY, |
| 4106 | .procname = "regen_max_retry", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4107 | .data = &ipv6_devconf.regen_max_retry, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4108 | .maxlen = sizeof(int), |
| 4109 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4110 | .proc_handler = &proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4111 | }, |
| 4112 | { |
| 4113 | .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR, |
| 4114 | .procname = "max_desync_factor", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4115 | .data = &ipv6_devconf.max_desync_factor, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4116 | .maxlen = sizeof(int), |
| 4117 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4118 | .proc_handler = &proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4119 | }, |
| 4120 | #endif |
| 4121 | { |
| 4122 | .ctl_name = NET_IPV6_MAX_ADDRESSES, |
| 4123 | .procname = "max_addresses", |
| 4124 | .data = &ipv6_devconf.max_addresses, |
| 4125 | .maxlen = sizeof(int), |
| 4126 | .mode = 0644, |
| 4127 | .proc_handler = &proc_dointvec, |
| 4128 | }, |
| 4129 | { |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 4130 | .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR, |
| 4131 | .procname = "accept_ra_defrtr", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4132 | .data = &ipv6_devconf.accept_ra_defrtr, |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 4133 | .maxlen = sizeof(int), |
| 4134 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4135 | .proc_handler = &proc_dointvec, |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 4136 | }, |
| 4137 | { |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 4138 | .ctl_name = NET_IPV6_ACCEPT_RA_PINFO, |
| 4139 | .procname = "accept_ra_pinfo", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4140 | .data = &ipv6_devconf.accept_ra_pinfo, |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 4141 | .maxlen = sizeof(int), |
| 4142 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4143 | .proc_handler = &proc_dointvec, |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 4144 | }, |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 4145 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 4146 | { |
| 4147 | .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF, |
| 4148 | .procname = "accept_ra_rtr_pref", |
| 4149 | .data = &ipv6_devconf.accept_ra_rtr_pref, |
| 4150 | .maxlen = sizeof(int), |
| 4151 | .mode = 0644, |
| 4152 | .proc_handler = &proc_dointvec, |
| 4153 | }, |
YOSHIFUJI Hideaki | 52e1635 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 4154 | { |
| 4155 | .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL, |
| 4156 | .procname = "router_probe_interval", |
| 4157 | .data = &ipv6_devconf.rtr_probe_interval, |
| 4158 | .maxlen = sizeof(int), |
| 4159 | .mode = 0644, |
| 4160 | .proc_handler = &proc_dointvec_jiffies, |
| 4161 | .strategy = &sysctl_jiffies, |
| 4162 | }, |
Neil Horman | fa03ef3 | 2007-01-30 14:30:10 -0800 | [diff] [blame] | 4163 | #ifdef CONFIG_IPV6_ROUTE_INFO |
YOSHIFUJI Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 4164 | { |
| 4165 | .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN, |
| 4166 | .procname = "accept_ra_rt_info_max_plen", |
| 4167 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, |
| 4168 | .maxlen = sizeof(int), |
| 4169 | .mode = 0644, |
| 4170 | .proc_handler = &proc_dointvec, |
| 4171 | }, |
| 4172 | #endif |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 4173 | #endif |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 4174 | { |
YOSHIFUJI Hideaki | fbea49e | 2006-09-22 14:43:49 -0700 | [diff] [blame] | 4175 | .ctl_name = NET_IPV6_PROXY_NDP, |
| 4176 | .procname = "proxy_ndp", |
| 4177 | .data = &ipv6_devconf.proxy_ndp, |
| 4178 | .maxlen = sizeof(int), |
| 4179 | .mode = 0644, |
| 4180 | .proc_handler = &proc_dointvec, |
| 4181 | }, |
| 4182 | { |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 4183 | .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE, |
| 4184 | .procname = "accept_source_route", |
| 4185 | .data = &ipv6_devconf.accept_source_route, |
| 4186 | .maxlen = sizeof(int), |
| 4187 | .mode = 0644, |
| 4188 | .proc_handler = &proc_dointvec, |
| 4189 | }, |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 4190 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 4191 | { |
| 4192 | .ctl_name = CTL_UNNUMBERED, |
| 4193 | .procname = "optimistic_dad", |
| 4194 | .data = &ipv6_devconf.optimistic_dad, |
| 4195 | .maxlen = sizeof(int), |
| 4196 | .mode = 0644, |
| 4197 | .proc_handler = &proc_dointvec, |
| 4198 | |
| 4199 | }, |
| 4200 | #endif |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 4201 | #ifdef CONFIG_IPV6_MROUTE |
| 4202 | { |
| 4203 | .ctl_name = CTL_UNNUMBERED, |
| 4204 | .procname = "mc_forwarding", |
| 4205 | .data = &ipv6_devconf.mc_forwarding, |
| 4206 | .maxlen = sizeof(int), |
| 4207 | .mode = 0644, |
| 4208 | .proc_handler = &proc_dointvec, |
| 4209 | }, |
| 4210 | #endif |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 4211 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4212 | .ctl_name = 0, /* sentinel */ |
| 4213 | } |
| 4214 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4215 | }; |
| 4216 | |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 4217 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
| 4218 | int ctl_name, struct inet6_dev *idev, struct ipv6_devconf *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4219 | { |
| 4220 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4221 | struct addrconf_sysctl_table *t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4222 | |
Pavel Emelyanov | 1dab622 | 2007-12-02 00:59:38 +1100 | [diff] [blame] | 4223 | #define ADDRCONF_CTL_PATH_DEV 3 |
| 4224 | |
| 4225 | struct ctl_path addrconf_ctl_path[] = { |
| 4226 | { .procname = "net", .ctl_name = CTL_NET, }, |
| 4227 | { .procname = "ipv6", .ctl_name = NET_IPV6, }, |
| 4228 | { .procname = "conf", .ctl_name = NET_IPV6_CONF, }, |
| 4229 | { /* to be set */ }, |
| 4230 | { }, |
| 4231 | }; |
| 4232 | |
| 4233 | |
Arnaldo Carvalho de Melo | af879cc | 2006-11-17 12:14:37 -0200 | [diff] [blame] | 4234 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4235 | if (t == NULL) |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 4236 | goto out; |
| 4237 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4238 | for (i=0; t->addrconf_vars[i].data; i++) { |
| 4239 | t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4240 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 4241 | t->addrconf_vars[i].extra2 = net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4242 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4243 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4244 | /* |
| 4245 | * Make a copy of dev_name, because '.procname' is regarded as const |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4246 | * by sysctl and we wouldn't want anyone to change it under our feet |
| 4247 | * (see SIOCSIFNAME). |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4248 | */ |
Pavel Emelyanov | 1dab622 | 2007-12-02 00:59:38 +1100 | [diff] [blame] | 4249 | t->dev_name = kstrdup(dev_name, GFP_KERNEL); |
| 4250 | if (!t->dev_name) |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 4251 | goto free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4252 | |
Pavel Emelyanov | 1dab622 | 2007-12-02 00:59:38 +1100 | [diff] [blame] | 4253 | addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name; |
| 4254 | addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].ctl_name = ctl_name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4255 | |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 4256 | t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path, |
Pavel Emelyanov | 1dab622 | 2007-12-02 00:59:38 +1100 | [diff] [blame] | 4257 | t->addrconf_vars); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4258 | if (t->sysctl_header == NULL) |
| 4259 | goto free_procname; |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 4260 | |
| 4261 | p->sysctl = t; |
Pavel Emelyanov | 9589731 | 2008-01-10 17:41:45 -0800 | [diff] [blame] | 4262 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4263 | |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 4264 | free_procname: |
Pavel Emelyanov | 1dab622 | 2007-12-02 00:59:38 +1100 | [diff] [blame] | 4265 | kfree(t->dev_name); |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 4266 | free: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4267 | kfree(t); |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 4268 | out: |
Pavel Emelyanov | 9589731 | 2008-01-10 17:41:45 -0800 | [diff] [blame] | 4269 | return -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4270 | } |
| 4271 | |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 4272 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
| 4273 | { |
| 4274 | struct addrconf_sysctl_table *t; |
| 4275 | |
| 4276 | if (p->sysctl == NULL) |
| 4277 | return; |
| 4278 | |
| 4279 | t = p->sysctl; |
| 4280 | p->sysctl = NULL; |
| 4281 | unregister_sysctl_table(t->sysctl_header); |
| 4282 | kfree(t->dev_name); |
| 4283 | kfree(t); |
| 4284 | } |
| 4285 | |
Pavel Emelyanov | f52295a | 2007-12-02 00:58:37 +1100 | [diff] [blame] | 4286 | static void addrconf_sysctl_register(struct inet6_dev *idev) |
| 4287 | { |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 4288 | neigh_sysctl_register(idev->dev, idev->nd_parms, NET_IPV6, |
| 4289 | NET_IPV6_NEIGH, "ipv6", |
| 4290 | &ndisc_ifinfo_sysctl_change, |
YOSHIFUJI Hideaki | 0686caa | 2008-05-19 16:25:42 -0700 | [diff] [blame] | 4291 | ndisc_ifinfo_sysctl_strategy); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 4292 | __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 4293 | idev->dev->ifindex, idev, &idev->cnf); |
Pavel Emelyanov | f52295a | 2007-12-02 00:58:37 +1100 | [diff] [blame] | 4294 | } |
| 4295 | |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 4296 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4297 | { |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 4298 | __addrconf_sysctl_unregister(&idev->cnf); |
| 4299 | neigh_sysctl_unregister(idev->nd_parms); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4300 | } |
| 4301 | |
| 4302 | |
| 4303 | #endif |
| 4304 | |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 4305 | static int addrconf_init_net(struct net *net) |
| 4306 | { |
| 4307 | int err; |
| 4308 | struct ipv6_devconf *all, *dflt; |
| 4309 | |
| 4310 | err = -ENOMEM; |
| 4311 | all = &ipv6_devconf; |
| 4312 | dflt = &ipv6_devconf_dflt; |
| 4313 | |
| 4314 | if (net != &init_net) { |
| 4315 | all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL); |
| 4316 | if (all == NULL) |
| 4317 | goto err_alloc_all; |
| 4318 | |
| 4319 | dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); |
| 4320 | if (dflt == NULL) |
| 4321 | goto err_alloc_dflt; |
| 4322 | } |
| 4323 | |
| 4324 | net->ipv6.devconf_all = all; |
| 4325 | net->ipv6.devconf_dflt = dflt; |
| 4326 | |
| 4327 | #ifdef CONFIG_SYSCTL |
| 4328 | err = __addrconf_sysctl_register(net, "all", NET_PROTO_CONF_ALL, |
| 4329 | NULL, all); |
| 4330 | if (err < 0) |
| 4331 | goto err_reg_all; |
| 4332 | |
| 4333 | err = __addrconf_sysctl_register(net, "default", NET_PROTO_CONF_DEFAULT, |
| 4334 | NULL, dflt); |
| 4335 | if (err < 0) |
| 4336 | goto err_reg_dflt; |
| 4337 | #endif |
| 4338 | return 0; |
| 4339 | |
| 4340 | #ifdef CONFIG_SYSCTL |
| 4341 | err_reg_dflt: |
| 4342 | __addrconf_sysctl_unregister(all); |
| 4343 | err_reg_all: |
| 4344 | kfree(dflt); |
| 4345 | #endif |
| 4346 | err_alloc_dflt: |
| 4347 | kfree(all); |
| 4348 | err_alloc_all: |
| 4349 | return err; |
| 4350 | } |
| 4351 | |
| 4352 | static void addrconf_exit_net(struct net *net) |
| 4353 | { |
| 4354 | #ifdef CONFIG_SYSCTL |
| 4355 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); |
| 4356 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); |
| 4357 | #endif |
| 4358 | if (net != &init_net) { |
| 4359 | kfree(net->ipv6.devconf_dflt); |
| 4360 | kfree(net->ipv6.devconf_all); |
| 4361 | } |
| 4362 | } |
| 4363 | |
| 4364 | static struct pernet_operations addrconf_ops = { |
| 4365 | .init = addrconf_init_net, |
| 4366 | .exit = addrconf_exit_net, |
| 4367 | }; |
| 4368 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4369 | /* |
| 4370 | * Device notifier |
| 4371 | */ |
| 4372 | |
| 4373 | int register_inet6addr_notifier(struct notifier_block *nb) |
| 4374 | { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4375 | return atomic_notifier_chain_register(&inet6addr_chain, nb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4376 | } |
| 4377 | |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 4378 | EXPORT_SYMBOL(register_inet6addr_notifier); |
| 4379 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4380 | int unregister_inet6addr_notifier(struct notifier_block *nb) |
| 4381 | { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4382 | return atomic_notifier_chain_unregister(&inet6addr_chain,nb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4383 | } |
| 4384 | |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 4385 | EXPORT_SYMBOL(unregister_inet6addr_notifier); |
| 4386 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 4387 | static void addrconf_net_exit(struct net *net) |
| 4388 | { |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 4389 | struct net_device *dev; |
| 4390 | |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 4391 | rtnl_lock(); |
| 4392 | /* clean dev list */ |
| 4393 | for_each_netdev(net, dev) { |
| 4394 | if (__in6_dev_get(dev) == NULL) |
| 4395 | continue; |
| 4396 | addrconf_ifdown(dev, 1); |
| 4397 | } |
| 4398 | addrconf_ifdown(net->loopback_dev, 2); |
| 4399 | rtnl_unlock(); |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 4400 | } |
| 4401 | |
| 4402 | static struct pernet_operations addrconf_net_ops = { |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 4403 | .exit = addrconf_net_exit, |
| 4404 | }; |
| 4405 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4406 | /* |
| 4407 | * Init / cleanup code |
| 4408 | */ |
| 4409 | |
| 4410 | int __init addrconf_init(void) |
| 4411 | { |
YOSHIFUJI Hideaki | 2a8cc6c | 2007-11-14 15:56:23 +0900 | [diff] [blame] | 4412 | int err; |
| 4413 | |
| 4414 | if ((err = ipv6_addr_label_init()) < 0) { |
| 4415 | printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n", |
| 4416 | err); |
| 4417 | return err; |
| 4418 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4419 | |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 4420 | register_pernet_subsys(&addrconf_ops); |
| 4421 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4422 | /* The addrconf netdev notifier requires that loopback_dev |
| 4423 | * has it's ipv6 private information allocated and setup |
| 4424 | * before it can bring up and give link-local addresses |
| 4425 | * to other devices which are up. |
| 4426 | * |
| 4427 | * Unfortunately, loopback_dev is not necessarily the first |
| 4428 | * entry in the global dev_base list of net devices. In fact, |
| 4429 | * it is likely to be the very last entry on that list. |
| 4430 | * So this causes the notifier registry below to try and |
| 4431 | * give link-local addresses to all devices besides loopback_dev |
| 4432 | * first, then loopback_dev, which cases all the non-loopback_dev |
| 4433 | * devices to fail to get a link-local address. |
| 4434 | * |
| 4435 | * So, as a temporary fix, allocate the ipv6 structure for |
| 4436 | * loopback_dev first by hand. |
| 4437 | * Longer term, all of the dependencies ipv6 has upon the loopback |
| 4438 | * device and it being up should be removed. |
| 4439 | */ |
| 4440 | rtnl_lock(); |
Eric W. Biederman | 2774c7a | 2007-09-26 22:10:56 -0700 | [diff] [blame] | 4441 | if (!ipv6_add_dev(init_net.loopback_dev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4442 | err = -ENOMEM; |
| 4443 | rtnl_unlock(); |
| 4444 | if (err) |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 4445 | goto errlo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4446 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 4447 | err = register_pernet_device(&addrconf_net_ops); |
| 4448 | if (err) |
| 4449 | return err; |
| 4450 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4451 | register_netdevice_notifier(&ipv6_dev_notf); |
| 4452 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4453 | addrconf_verify(0); |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 4454 | |
| 4455 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo); |
| 4456 | if (err < 0) |
| 4457 | goto errout; |
| 4458 | |
| 4459 | /* Only the first call to __rtnl_register can fail */ |
| 4460 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL); |
| 4461 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL); |
| 4462 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr); |
| 4463 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr); |
| 4464 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr); |
| 4465 | |
YOSHIFUJI Hideaki | 2a8cc6c | 2007-11-14 15:56:23 +0900 | [diff] [blame] | 4466 | ipv6_addr_label_rtnl_register(); |
| 4467 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4468 | return 0; |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 4469 | errout: |
| 4470 | unregister_netdevice_notifier(&ipv6_dev_notf); |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 4471 | errlo: |
| 4472 | unregister_pernet_subsys(&addrconf_ops); |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 4473 | |
| 4474 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4475 | } |
| 4476 | |
Daniel Lezcano | 09f7709 | 2007-12-13 05:34:58 -0800 | [diff] [blame] | 4477 | void addrconf_cleanup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4478 | { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4479 | struct inet6_ifaddr *ifa; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4480 | int i; |
| 4481 | |
| 4482 | unregister_netdevice_notifier(&ipv6_dev_notf); |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 4483 | unregister_pernet_device(&addrconf_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4484 | |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 4485 | unregister_pernet_subsys(&addrconf_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4486 | |
| 4487 | rtnl_lock(); |
| 4488 | |
| 4489 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4490 | * Check hash table. |
| 4491 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4492 | write_lock_bh(&addrconf_hash_lock); |
| 4493 | for (i=0; i < IN6_ADDR_HSIZE; i++) { |
| 4494 | for (ifa=inet6_addr_lst[i]; ifa; ) { |
| 4495 | struct inet6_ifaddr *bifa; |
| 4496 | |
| 4497 | bifa = ifa; |
| 4498 | ifa = ifa->lst_next; |
| 4499 | printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa); |
| 4500 | /* Do not free it; something is wrong. |
| 4501 | Now we can investigate it with debugger. |
| 4502 | */ |
| 4503 | } |
| 4504 | } |
| 4505 | write_unlock_bh(&addrconf_hash_lock); |
| 4506 | |
| 4507 | del_timer(&addr_chk_timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4508 | rtnl_unlock(); |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 4509 | |
| 4510 | unregister_pernet_subsys(&addrconf_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4511 | } |