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 | |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 122 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | static int ipv6_count_addresses(struct inet6_dev *idev); |
| 124 | |
| 125 | /* |
| 126 | * Configured unicast address hash table |
| 127 | */ |
| 128 | static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE]; |
| 129 | static DEFINE_RWLOCK(addrconf_hash_lock); |
| 130 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | static void addrconf_verify(unsigned long); |
| 132 | |
Ingo Molnar | 8d06afa | 2005-09-09 13:10:40 -0700 | [diff] [blame] | 133 | static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | static DEFINE_SPINLOCK(addrconf_verify_lock); |
| 135 | |
| 136 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); |
| 137 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); |
| 138 | |
| 139 | static int addrconf_ifdown(struct net_device *dev, int how); |
| 140 | |
Jamal Hadi Salim | e431b8c | 2005-06-18 22:55:31 -0700 | [diff] [blame] | 141 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | static void addrconf_dad_timer(unsigned long data); |
| 143 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 144 | static void addrconf_dad_run(struct inet6_dev *idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | static void addrconf_rs_timer(unsigned long data); |
| 146 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); |
| 147 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); |
| 148 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 149 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | struct prefix_info *pinfo); |
Daniel Lezcano | 06bfe65 | 2008-01-10 22:43:42 -0800 | [diff] [blame] | 151 | static int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
| 152 | struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 154 | static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | |
Adrian Bunk | 888c848 | 2008-07-22 14:21:58 -0700 | [diff] [blame] | 156 | static struct ipv6_devconf ipv6_devconf __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | .forwarding = 0, |
| 158 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, |
| 159 | .mtu6 = IPV6_MIN_MTU, |
| 160 | .accept_ra = 1, |
| 161 | .accept_redirects = 1, |
| 162 | .autoconf = 1, |
| 163 | .force_mld_version = 0, |
| 164 | .dad_transmits = 1, |
| 165 | .rtr_solicits = MAX_RTR_SOLICITATIONS, |
| 166 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, |
| 167 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, |
| 168 | #ifdef CONFIG_IPV6_PRIVACY |
| 169 | .use_tempaddr = 0, |
| 170 | .temp_valid_lft = TEMP_VALID_LIFETIME, |
| 171 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, |
| 172 | .regen_max_retry = REGEN_MAX_RETRY, |
| 173 | .max_desync_factor = MAX_DESYNC_FACTOR, |
| 174 | #endif |
| 175 | .max_addresses = IPV6_MAX_ADDRESSES, |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 176 | .accept_ra_defrtr = 1, |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 177 | .accept_ra_pinfo = 1, |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 178 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 179 | .accept_ra_rtr_pref = 1, |
YOSHIFUJI Hideaki | 52e1635 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 180 | .rtr_probe_interval = 60 * HZ, |
YOSHIFUJI Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 181 | #ifdef CONFIG_IPV6_ROUTE_INFO |
| 182 | .accept_ra_rt_info_max_plen = 0, |
| 183 | #endif |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 184 | #endif |
YOSHIFUJI Hideaki | fbea49e | 2006-09-22 14:43:49 -0700 | [diff] [blame] | 185 | .proxy_ndp = 0, |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 186 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
YOSHIFUJI Hideaki | 778d80b | 2008-06-28 14:17:11 +0900 | [diff] [blame] | 187 | .disable_ipv6 = 0, |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 188 | .accept_dad = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | }; |
| 190 | |
Brian Haley | ab32ea5 | 2006-09-22 14:15:41 -0700 | [diff] [blame] | 191 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | .forwarding = 0, |
| 193 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, |
| 194 | .mtu6 = IPV6_MIN_MTU, |
| 195 | .accept_ra = 1, |
| 196 | .accept_redirects = 1, |
| 197 | .autoconf = 1, |
| 198 | .dad_transmits = 1, |
| 199 | .rtr_solicits = MAX_RTR_SOLICITATIONS, |
| 200 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, |
| 201 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, |
| 202 | #ifdef CONFIG_IPV6_PRIVACY |
| 203 | .use_tempaddr = 0, |
| 204 | .temp_valid_lft = TEMP_VALID_LIFETIME, |
| 205 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, |
| 206 | .regen_max_retry = REGEN_MAX_RETRY, |
| 207 | .max_desync_factor = MAX_DESYNC_FACTOR, |
| 208 | #endif |
| 209 | .max_addresses = IPV6_MAX_ADDRESSES, |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 210 | .accept_ra_defrtr = 1, |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 211 | .accept_ra_pinfo = 1, |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 212 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 213 | .accept_ra_rtr_pref = 1, |
YOSHIFUJI Hideaki | 52e1635 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 214 | .rtr_probe_interval = 60 * HZ, |
YOSHIFUJI Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 215 | #ifdef CONFIG_IPV6_ROUTE_INFO |
| 216 | .accept_ra_rt_info_max_plen = 0, |
| 217 | #endif |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 218 | #endif |
YOSHIFUJI Hideaki | fbea49e | 2006-09-22 14:43:49 -0700 | [diff] [blame] | 219 | .proxy_ndp = 0, |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 220 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
YOSHIFUJI Hideaki | 778d80b | 2008-06-28 14:17:11 +0900 | [diff] [blame] | 221 | .disable_ipv6 = 0, |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 222 | .accept_dad = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | }; |
| 224 | |
| 225 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 228 | const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT; |
| 229 | const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 231 | /* Check if a valid qdisc is available */ |
David S. Miller | 0529794 | 2008-07-08 23:01:27 -0700 | [diff] [blame] | 232 | static inline bool addrconf_qdisc_ok(const struct net_device *dev) |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 233 | { |
David S. Miller | 0529794 | 2008-07-08 23:01:27 -0700 | [diff] [blame] | 234 | return !qdisc_tx_is_noop(dev); |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 235 | } |
| 236 | |
YOSHIFUJI Hideaki | 2b5ead4 | 2008-05-13 01:16:24 +0900 | [diff] [blame] | 237 | /* Check if a route is valid prefix route */ |
| 238 | static inline int addrconf_is_prefix_route(const struct rt6_info *rt) |
| 239 | { |
| 240 | return ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0); |
| 241 | } |
| 242 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | static void addrconf_del_timer(struct inet6_ifaddr *ifp) |
| 244 | { |
| 245 | if (del_timer(&ifp->timer)) |
| 246 | __in6_ifa_put(ifp); |
| 247 | } |
| 248 | |
| 249 | enum addrconf_timer_t |
| 250 | { |
| 251 | AC_NONE, |
| 252 | AC_DAD, |
| 253 | AC_RS, |
| 254 | }; |
| 255 | |
| 256 | static void addrconf_mod_timer(struct inet6_ifaddr *ifp, |
| 257 | enum addrconf_timer_t what, |
| 258 | unsigned long when) |
| 259 | { |
| 260 | if (!del_timer(&ifp->timer)) |
| 261 | in6_ifa_hold(ifp); |
| 262 | |
| 263 | switch (what) { |
| 264 | case AC_DAD: |
| 265 | ifp->timer.function = addrconf_dad_timer; |
| 266 | break; |
| 267 | case AC_RS: |
| 268 | ifp->timer.function = addrconf_rs_timer; |
| 269 | break; |
| 270 | default:; |
| 271 | } |
| 272 | ifp->timer.expires = jiffies + when; |
| 273 | add_timer(&ifp->timer); |
| 274 | } |
| 275 | |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 276 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
| 277 | { |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 278 | if (snmp_mib_init((void **)idev->stats.ipv6, |
YOSHIFUJI Hideaki | c69bce2 | 2008-01-23 22:31:45 -0800 | [diff] [blame] | 279 | sizeof(struct ipstats_mib)) < 0) |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 280 | goto err_ip; |
| 281 | if (snmp_mib_init((void **)idev->stats.icmpv6, |
YOSHIFUJI Hideaki | c69bce2 | 2008-01-23 22:31:45 -0800 | [diff] [blame] | 282 | sizeof(struct icmpv6_mib)) < 0) |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 283 | goto err_icmp; |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 284 | if (snmp_mib_init((void **)idev->stats.icmpv6msg, |
YOSHIFUJI Hideaki | c69bce2 | 2008-01-23 22:31:45 -0800 | [diff] [blame] | 285 | sizeof(struct icmpv6msg_mib)) < 0) |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 286 | goto err_icmpmsg; |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 287 | |
| 288 | return 0; |
| 289 | |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 290 | err_icmpmsg: |
| 291 | snmp_mib_free((void **)idev->stats.icmpv6); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 292 | err_icmp: |
| 293 | snmp_mib_free((void **)idev->stats.ipv6); |
| 294 | err_ip: |
Pavel Emelyanov | aaf70ec | 2007-10-17 21:25:32 -0700 | [diff] [blame] | 295 | return -ENOMEM; |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 296 | } |
| 297 | |
Pavel Emelyanov | 16910b9 | 2007-10-17 21:23:43 -0700 | [diff] [blame] | 298 | static void snmp6_free_dev(struct inet6_dev *idev) |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 299 | { |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 300 | snmp_mib_free((void **)idev->stats.icmpv6msg); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 301 | snmp_mib_free((void **)idev->stats.icmpv6); |
| 302 | snmp_mib_free((void **)idev->stats.ipv6); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 303 | } |
| 304 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | /* Nobody refers to this device, we may destroy it. */ |
| 306 | |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 307 | static void in6_dev_finish_destroy_rcu(struct rcu_head *head) |
| 308 | { |
| 309 | struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu); |
| 310 | kfree(idev); |
| 311 | } |
| 312 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | void in6_dev_finish_destroy(struct inet6_dev *idev) |
| 314 | { |
| 315 | struct net_device *dev = idev->dev; |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 316 | |
| 317 | WARN_ON(idev->addr_list != NULL); |
| 318 | WARN_ON(idev->mc_list != NULL); |
| 319 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | #ifdef NET_REFCNT_DEBUG |
| 321 | printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL"); |
| 322 | #endif |
| 323 | dev_put(dev); |
| 324 | if (!idev->dead) { |
| 325 | printk("Freeing alive inet6 device %p\n", idev); |
| 326 | return; |
| 327 | } |
| 328 | snmp6_free_dev(idev); |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 329 | call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | } |
| 331 | |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 332 | EXPORT_SYMBOL(in6_dev_finish_destroy); |
| 333 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | static struct inet6_dev * ipv6_add_dev(struct net_device *dev) |
| 335 | { |
| 336 | struct inet6_dev *ndev; |
| 337 | |
| 338 | ASSERT_RTNL(); |
| 339 | |
| 340 | if (dev->mtu < IPV6_MIN_MTU) |
| 341 | return NULL; |
| 342 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 343 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 345 | if (ndev == NULL) |
| 346 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 348 | rwlock_init(&ndev->lock); |
| 349 | ndev->dev = dev; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 350 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 351 | ndev->cnf.mtu6 = dev->mtu; |
| 352 | ndev->cnf.sysctl = NULL; |
| 353 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); |
| 354 | if (ndev->nd_parms == NULL) { |
| 355 | kfree(ndev); |
| 356 | return NULL; |
| 357 | } |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 358 | if (ndev->cnf.forwarding) |
| 359 | dev_disable_lro(dev); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 360 | /* We refer to the device */ |
| 361 | dev_hold(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 363 | if (snmp6_alloc_dev(ndev) < 0) { |
| 364 | ADBG((KERN_WARNING |
| 365 | "%s(): cannot allocate memory for statistics; dev=%s.\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 366 | __func__, dev->name)); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 367 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
| 368 | ndev->dead = 1; |
| 369 | in6_dev_finish_destroy(ndev); |
| 370 | return NULL; |
| 371 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 373 | if (snmp6_register_dev(ndev) < 0) { |
| 374 | ADBG((KERN_WARNING |
| 375 | "%s(): cannot create /proc/net/dev_snmp6/%s\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 376 | __func__, dev->name)); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 377 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
| 378 | ndev->dead = 1; |
| 379 | in6_dev_finish_destroy(ndev); |
| 380 | return NULL; |
| 381 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 383 | /* One reference from device. We must do this before |
| 384 | * we invoke __ipv6_regen_rndid(). |
| 385 | */ |
| 386 | in6_dev_hold(ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 388 | if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) |
| 389 | ndev->cnf.accept_dad = -1; |
| 390 | |
YOSHIFUJI Hideaki | b077d7a | 2008-04-13 23:42:18 -0700 | [diff] [blame] | 391 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
| 392 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { |
| 393 | printk(KERN_INFO |
| 394 | "%s: Disabled Multicast RS\n", |
| 395 | dev->name); |
| 396 | ndev->cnf.rtr_solicits = 0; |
| 397 | } |
| 398 | #endif |
| 399 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | #ifdef CONFIG_IPV6_PRIVACY |
Pavel Emelyanov | b24b8a2 | 2008-01-23 21:20:07 -0800 | [diff] [blame] | 401 | setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 402 | if ((dev->flags&IFF_LOOPBACK) || |
| 403 | dev->type == ARPHRD_TUNNEL || |
YOSHIFUJI Hideaki | 9625ed7 | 2008-04-13 23:47:11 -0700 | [diff] [blame] | 404 | dev->type == ARPHRD_TUNNEL6 || |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 405 | dev->type == ARPHRD_SIT || |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 406 | dev->type == ARPHRD_NONE) { |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 407 | printk(KERN_INFO |
| 408 | "%s: Disabled Privacy Extensions\n", |
| 409 | dev->name); |
| 410 | ndev->cnf.use_tempaddr = -1; |
| 411 | } else { |
| 412 | in6_dev_hold(ndev); |
| 413 | ipv6_regen_rndid((unsigned long) ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | } |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 415 | #endif |
| 416 | |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 417 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
Herbert Xu | 53aadcc | 2007-03-27 14:31:52 -0700 | [diff] [blame] | 418 | ndev->if_flags |= IF_READY; |
| 419 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 420 | ipv6_mc_init_dev(ndev); |
| 421 | ndev->tstamp = jiffies; |
Pavel Emelyanov | f52295a | 2007-12-02 00:58:37 +1100 | [diff] [blame] | 422 | addrconf_sysctl_register(ndev); |
David L Stevens | 30c4cf5 | 2007-01-04 12:31:14 -0800 | [diff] [blame] | 423 | /* protected by rtnl_lock */ |
| 424 | rcu_assign_pointer(dev->ip6_ptr, ndev); |
YOSHIFUJI Hideaki | d88ae4c | 2007-01-14 21:48:40 -0800 | [diff] [blame] | 425 | |
| 426 | /* Join all-node multicast group */ |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 427 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
YOSHIFUJI Hideaki | d88ae4c | 2007-01-14 21:48:40 -0800 | [diff] [blame] | 428 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | return ndev; |
| 430 | } |
| 431 | |
YOSHIFUJI Hideaki | cee8947 | 2008-04-13 23:21:16 -0700 | [diff] [blame] | 432 | static struct inet6_dev * ipv6_find_idev(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | { |
| 434 | struct inet6_dev *idev; |
| 435 | |
| 436 | ASSERT_RTNL(); |
| 437 | |
| 438 | if ((idev = __in6_dev_get(dev)) == NULL) { |
| 439 | if ((idev = ipv6_add_dev(dev)) == NULL) |
| 440 | return NULL; |
| 441 | } |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 442 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | if (dev->flags&IFF_UP) |
| 444 | ipv6_mc_up(idev); |
| 445 | return idev; |
| 446 | } |
| 447 | |
| 448 | #ifdef CONFIG_SYSCTL |
| 449 | static void dev_forward_change(struct inet6_dev *idev) |
| 450 | { |
| 451 | struct net_device *dev; |
| 452 | struct inet6_ifaddr *ifa; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | |
| 454 | if (!idev) |
| 455 | return; |
| 456 | dev = idev->dev; |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 457 | if (idev->cnf.forwarding) |
| 458 | dev_disable_lro(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | if (dev && (dev->flags & IFF_MULTICAST)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | if (idev->cnf.forwarding) |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 461 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | else |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 463 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | } |
| 465 | for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) { |
Michal Wrobel | 2c12a74 | 2007-02-26 15:36:10 -0800 | [diff] [blame] | 466 | if (ifa->flags&IFA_F_TENTATIVE) |
| 467 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | if (idev->cnf.forwarding) |
| 469 | addrconf_join_anycast(ifa); |
| 470 | else |
| 471 | addrconf_leave_anycast(ifa); |
| 472 | } |
| 473 | } |
| 474 | |
| 475 | |
Pavel Emelyanov | e186932 | 2008-01-10 17:43:50 -0800 | [diff] [blame] | 476 | static void addrconf_forward_change(struct net *net, __s32 newf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | { |
| 478 | struct net_device *dev; |
| 479 | struct inet6_dev *idev; |
| 480 | |
| 481 | read_lock(&dev_base_lock); |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 482 | for_each_netdev(net, dev) { |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 483 | rcu_read_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | idev = __in6_dev_get(dev); |
| 485 | if (idev) { |
Pavel Emelyanov | e186932 | 2008-01-10 17:43:50 -0800 | [diff] [blame] | 486 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
| 487 | idev->cnf.forwarding = newf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | if (changed) |
| 489 | dev_forward_change(idev); |
| 490 | } |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 491 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | } |
| 493 | read_unlock(&dev_base_lock); |
| 494 | } |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 495 | |
| 496 | static void addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old) |
| 497 | { |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 498 | struct net *net; |
| 499 | |
| 500 | net = (struct net *)table->extra2; |
Pavel Emelyanov | 441fc2a | 2008-01-10 17:43:22 -0800 | [diff] [blame] | 501 | if (p == &net->ipv6.devconf_dflt->forwarding) |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 502 | return; |
| 503 | |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 504 | rtnl_lock(); |
Pavel Emelyanov | e186932 | 2008-01-10 17:43:50 -0800 | [diff] [blame] | 505 | if (p == &net->ipv6.devconf_all->forwarding) { |
| 506 | __s32 newf = net->ipv6.devconf_all->forwarding; |
| 507 | net->ipv6.devconf_dflt->forwarding = newf; |
| 508 | addrconf_forward_change(net, newf); |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 509 | } else if ((!*p) ^ (!old)) |
| 510 | dev_forward_change((struct inet6_dev *)table->extra1); |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 511 | rtnl_unlock(); |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 512 | |
| 513 | if (*p) |
Daniel Lezcano | 7b4da53 | 2008-03-04 13:47:14 -0800 | [diff] [blame] | 514 | rt6_purge_dflt_routers(net); |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 515 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | #endif |
| 517 | |
| 518 | /* Nobody refers to this ifaddr, destroy it */ |
| 519 | |
| 520 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) |
| 521 | { |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 522 | WARN_ON(ifp->if_next != NULL); |
| 523 | WARN_ON(ifp->lst_next != NULL); |
| 524 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | #ifdef NET_REFCNT_DEBUG |
| 526 | printk(KERN_DEBUG "inet6_ifa_finish_destroy\n"); |
| 527 | #endif |
| 528 | |
| 529 | in6_dev_put(ifp->idev); |
| 530 | |
| 531 | if (del_timer(&ifp->timer)) |
| 532 | printk("Timer is still running, when freeing ifa=%p\n", ifp); |
| 533 | |
| 534 | if (!ifp->dead) { |
| 535 | printk("Freeing alive inet6 address %p\n", ifp); |
| 536 | return; |
| 537 | } |
| 538 | dst_release(&ifp->rt->u.dst); |
| 539 | |
| 540 | kfree(ifp); |
| 541 | } |
| 542 | |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 543 | static void |
| 544 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) |
| 545 | { |
| 546 | struct inet6_ifaddr *ifa, **ifap; |
YOSHIFUJI Hideaki | 8a6ce0c | 2006-07-11 13:05:30 -0700 | [diff] [blame] | 547 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 548 | |
| 549 | /* |
| 550 | * Each device address list is sorted in order of scope - |
| 551 | * global before linklocal. |
| 552 | */ |
| 553 | for (ifap = &idev->addr_list; (ifa = *ifap) != NULL; |
| 554 | ifap = &ifa->if_next) { |
YOSHIFUJI Hideaki | 8a6ce0c | 2006-07-11 13:05:30 -0700 | [diff] [blame] | 555 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 556 | break; |
| 557 | } |
| 558 | |
| 559 | ifp->if_next = *ifap; |
| 560 | *ifap = ifp; |
| 561 | } |
| 562 | |
YOSHIFUJI Hideaki | 3eb84f4 | 2008-04-10 15:42:08 +0900 | [diff] [blame] | 563 | /* |
| 564 | * Hash function taken from net_alias.c |
| 565 | */ |
| 566 | static u8 ipv6_addr_hash(const struct in6_addr *addr) |
| 567 | { |
| 568 | __u32 word; |
| 569 | |
| 570 | /* |
| 571 | * We perform the hash function over the last 64 bits of the address |
| 572 | * This will include the IEEE address token on links that support it. |
| 573 | */ |
| 574 | |
| 575 | word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]); |
| 576 | word ^= (word >> 16); |
| 577 | word ^= (word >> 8); |
| 578 | |
| 579 | return ((word ^ (word >> 4)) & 0x0f); |
| 580 | } |
| 581 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | /* On success it returns ifp with increased reference count */ |
| 583 | |
| 584 | static struct inet6_ifaddr * |
| 585 | 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] | 586 | int scope, u32 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | { |
| 588 | struct inet6_ifaddr *ifa = NULL; |
| 589 | struct rt6_info *rt; |
| 590 | int hash; |
| 591 | int err = 0; |
YOSHIFUJI Hideaki | d68b827 | 2008-06-25 16:26:47 +0900 | [diff] [blame] | 592 | int addr_type = ipv6_addr_type(addr); |
| 593 | |
| 594 | if (addr_type == IPV6_ADDR_ANY || |
| 595 | addr_type & IPV6_ADDR_MULTICAST || |
| 596 | (!(idev->dev->flags & IFF_LOOPBACK) && |
| 597 | addr_type & IPV6_ADDR_LOOPBACK)) |
| 598 | return ERR_PTR(-EADDRNOTAVAIL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 600 | rcu_read_lock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | if (idev->dead) { |
| 602 | err = -ENODEV; /*XXX*/ |
| 603 | goto out2; |
| 604 | } |
| 605 | |
| 606 | write_lock(&addrconf_hash_lock); |
| 607 | |
| 608 | /* Ignore adding duplicate addresses on an interface */ |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 609 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | ADBG(("ipv6_add_addr: already assigned\n")); |
| 611 | err = -EEXIST; |
| 612 | goto out; |
| 613 | } |
| 614 | |
Ingo Oeser | 322f74a | 2006-03-20 23:01:47 -0800 | [diff] [blame] | 615 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | |
| 617 | if (ifa == NULL) { |
| 618 | ADBG(("ipv6_add_addr: malloc failed\n")); |
| 619 | err = -ENOBUFS; |
| 620 | goto out; |
| 621 | } |
| 622 | |
| 623 | rt = addrconf_dst_alloc(idev, addr, 0); |
| 624 | if (IS_ERR(rt)) { |
| 625 | err = PTR_ERR(rt); |
| 626 | goto out; |
| 627 | } |
| 628 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | ipv6_addr_copy(&ifa->addr, addr); |
| 630 | |
| 631 | spin_lock_init(&ifa->lock); |
| 632 | init_timer(&ifa->timer); |
| 633 | ifa->timer.data = (unsigned long) ifa; |
| 634 | ifa->scope = scope; |
| 635 | ifa->prefix_len = pfxlen; |
| 636 | ifa->flags = flags | IFA_F_TENTATIVE; |
| 637 | ifa->cstamp = ifa->tstamp = jiffies; |
| 638 | |
Keir Fraser | 57f5f54 | 2006-08-29 02:43:49 -0700 | [diff] [blame] | 639 | ifa->rt = rt; |
| 640 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 641 | /* |
| 642 | * part one of RFC 4429, section 3.3 |
| 643 | * We should not configure an address as |
| 644 | * optimistic if we do not yet know the link |
| 645 | * layer address of our nexhop router |
| 646 | */ |
| 647 | |
| 648 | if (rt->rt6i_nexthop == NULL) |
| 649 | ifa->flags &= ~IFA_F_OPTIMISTIC; |
| 650 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | ifa->idev = idev; |
| 652 | in6_dev_hold(idev); |
| 653 | /* For caller */ |
| 654 | in6_ifa_hold(ifa); |
| 655 | |
| 656 | /* Add to big hash table */ |
| 657 | hash = ipv6_addr_hash(addr); |
| 658 | |
| 659 | ifa->lst_next = inet6_addr_lst[hash]; |
| 660 | inet6_addr_lst[hash] = ifa; |
| 661 | in6_ifa_hold(ifa); |
| 662 | write_unlock(&addrconf_hash_lock); |
| 663 | |
| 664 | write_lock(&idev->lock); |
| 665 | /* Add to inet6_dev unicast addr list. */ |
Brian Haley | e55ffac | 2006-07-10 15:25:51 -0700 | [diff] [blame] | 666 | ipv6_link_dev_addr(idev, ifa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | |
| 668 | #ifdef CONFIG_IPV6_PRIVACY |
| 669 | if (ifa->flags&IFA_F_TEMPORARY) { |
| 670 | ifa->tmp_next = idev->tempaddr_list; |
| 671 | idev->tempaddr_list = ifa; |
| 672 | in6_ifa_hold(ifa); |
| 673 | } |
| 674 | #endif |
| 675 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | in6_ifa_hold(ifa); |
| 677 | write_unlock(&idev->lock); |
| 678 | out2: |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 679 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | |
YOSHIFUJI Hideaki | fd92833 | 2005-04-19 22:27:09 -0700 | [diff] [blame] | 681 | if (likely(err == 0)) |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 682 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | else { |
| 684 | kfree(ifa); |
| 685 | ifa = ERR_PTR(err); |
| 686 | } |
| 687 | |
| 688 | return ifa; |
| 689 | out: |
| 690 | write_unlock(&addrconf_hash_lock); |
| 691 | goto out2; |
| 692 | } |
| 693 | |
| 694 | /* This function wants to get referenced ifp and releases it before return */ |
| 695 | |
| 696 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) |
| 697 | { |
| 698 | struct inet6_ifaddr *ifa, **ifap; |
| 699 | struct inet6_dev *idev = ifp->idev; |
| 700 | int hash; |
| 701 | int deleted = 0, onlink = 0; |
| 702 | unsigned long expires = jiffies; |
| 703 | |
| 704 | hash = ipv6_addr_hash(&ifp->addr); |
| 705 | |
| 706 | ifp->dead = 1; |
| 707 | |
| 708 | write_lock_bh(&addrconf_hash_lock); |
| 709 | for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL; |
| 710 | ifap = &ifa->lst_next) { |
| 711 | if (ifa == ifp) { |
| 712 | *ifap = ifa->lst_next; |
| 713 | __in6_ifa_put(ifp); |
| 714 | ifa->lst_next = NULL; |
| 715 | break; |
| 716 | } |
| 717 | } |
| 718 | write_unlock_bh(&addrconf_hash_lock); |
| 719 | |
| 720 | write_lock_bh(&idev->lock); |
| 721 | #ifdef CONFIG_IPV6_PRIVACY |
| 722 | if (ifp->flags&IFA_F_TEMPORARY) { |
| 723 | for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL; |
| 724 | ifap = &ifa->tmp_next) { |
| 725 | if (ifa == ifp) { |
| 726 | *ifap = ifa->tmp_next; |
| 727 | if (ifp->ifpub) { |
| 728 | in6_ifa_put(ifp->ifpub); |
| 729 | ifp->ifpub = NULL; |
| 730 | } |
| 731 | __in6_ifa_put(ifp); |
| 732 | ifa->tmp_next = NULL; |
| 733 | break; |
| 734 | } |
| 735 | } |
| 736 | } |
| 737 | #endif |
| 738 | |
Kristian Slavov | 1d14280 | 2005-12-21 18:47:24 -0800 | [diff] [blame] | 739 | for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | if (ifa == ifp) { |
| 741 | *ifap = ifa->if_next; |
| 742 | __in6_ifa_put(ifp); |
| 743 | ifa->if_next = NULL; |
| 744 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) |
| 745 | break; |
| 746 | deleted = 1; |
Kristian Slavov | 1d14280 | 2005-12-21 18:47:24 -0800 | [diff] [blame] | 747 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | } else if (ifp->flags & IFA_F_PERMANENT) { |
| 749 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, |
| 750 | ifp->prefix_len)) { |
| 751 | if (ifa->flags & IFA_F_PERMANENT) { |
| 752 | onlink = 1; |
| 753 | if (deleted) |
| 754 | break; |
| 755 | } else { |
| 756 | unsigned long lifetime; |
| 757 | |
| 758 | if (!onlink) |
| 759 | onlink = -1; |
| 760 | |
| 761 | spin_lock(&ifa->lock); |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 762 | |
| 763 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); |
| 764 | /* |
| 765 | * Note: Because this address is |
| 766 | * not permanent, lifetime < |
| 767 | * LONG_MAX / HZ here. |
| 768 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | if (time_before(expires, |
| 770 | ifa->tstamp + lifetime * HZ)) |
| 771 | expires = ifa->tstamp + lifetime * HZ; |
| 772 | spin_unlock(&ifa->lock); |
| 773 | } |
| 774 | } |
| 775 | } |
Kristian Slavov | 1d14280 | 2005-12-21 18:47:24 -0800 | [diff] [blame] | 776 | ifap = &ifa->if_next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | } |
| 778 | write_unlock_bh(&idev->lock); |
| 779 | |
Andrey Vagin | b223856 | 2008-07-08 15:13:31 -0700 | [diff] [blame] | 780 | addrconf_del_timer(ifp); |
| 781 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
| 783 | |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 784 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | /* |
| 787 | * Purge or update corresponding prefix |
| 788 | * |
| 789 | * 1) we don't purge prefix here if address was not permanent. |
| 790 | * prefix is managed by its own lifetime. |
| 791 | * 2) if there're no addresses, delete prefix. |
| 792 | * 3) if there're still other permanent address(es), |
| 793 | * corresponding prefix is still permanent. |
| 794 | * 4) otherwise, update prefix lifetime to the |
| 795 | * longest valid lifetime among the corresponding |
| 796 | * addresses on the device. |
| 797 | * Note: subsequent RA will update lifetime. |
| 798 | * |
| 799 | * --yoshfuji |
| 800 | */ |
| 801 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { |
| 802 | struct in6_addr prefix; |
| 803 | struct rt6_info *rt; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 804 | struct net *net = dev_net(ifp->idev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 806 | rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | |
YOSHIFUJI Hideaki | 2b5ead4 | 2008-05-13 01:16:24 +0900 | [diff] [blame] | 808 | if (rt && addrconf_is_prefix_route(rt)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | if (onlink == 0) { |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 810 | ip6_del_rt(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | rt = NULL; |
| 812 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { |
| 813 | rt->rt6i_expires = expires; |
| 814 | rt->rt6i_flags |= RTF_EXPIRES; |
| 815 | } |
| 816 | } |
| 817 | dst_release(&rt->u.dst); |
| 818 | } |
| 819 | |
| 820 | in6_ifa_put(ifp); |
| 821 | } |
| 822 | |
| 823 | #ifdef CONFIG_IPV6_PRIVACY |
| 824 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) |
| 825 | { |
| 826 | struct inet6_dev *idev = ifp->idev; |
| 827 | struct in6_addr addr, *tmpaddr; |
| 828 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp; |
Benoit Boissinot | eac55bf | 2008-04-02 00:01:35 -0700 | [diff] [blame] | 829 | unsigned long regen_advance; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | int tmp_plen; |
| 831 | int ret = 0; |
| 832 | int max_addresses; |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 833 | u32 addr_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | |
| 835 | write_lock(&idev->lock); |
| 836 | if (ift) { |
| 837 | spin_lock_bh(&ift->lock); |
| 838 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); |
| 839 | spin_unlock_bh(&ift->lock); |
| 840 | tmpaddr = &addr; |
| 841 | } else { |
| 842 | tmpaddr = NULL; |
| 843 | } |
| 844 | retry: |
| 845 | in6_dev_hold(idev); |
| 846 | if (idev->cnf.use_tempaddr <= 0) { |
| 847 | write_unlock(&idev->lock); |
| 848 | printk(KERN_INFO |
| 849 | "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); |
| 850 | in6_dev_put(idev); |
| 851 | ret = -1; |
| 852 | goto out; |
| 853 | } |
| 854 | spin_lock_bh(&ifp->lock); |
| 855 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { |
| 856 | idev->cnf.use_tempaddr = -1; /*XXX*/ |
| 857 | spin_unlock_bh(&ifp->lock); |
| 858 | write_unlock(&idev->lock); |
| 859 | printk(KERN_WARNING |
| 860 | "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); |
| 861 | in6_dev_put(idev); |
| 862 | ret = -1; |
| 863 | goto out; |
| 864 | } |
| 865 | in6_ifa_hold(ifp); |
| 866 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); |
| 867 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { |
| 868 | spin_unlock_bh(&ifp->lock); |
| 869 | write_unlock(&idev->lock); |
| 870 | printk(KERN_WARNING |
| 871 | "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); |
| 872 | in6_ifa_put(ifp); |
| 873 | in6_dev_put(idev); |
| 874 | ret = -1; |
| 875 | goto out; |
| 876 | } |
| 877 | memcpy(&addr.s6_addr[8], idev->rndid, 8); |
| 878 | tmp_valid_lft = min_t(__u32, |
| 879 | ifp->valid_lft, |
| 880 | idev->cnf.temp_valid_lft); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 881 | tmp_prefered_lft = min_t(__u32, |
| 882 | ifp->prefered_lft, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | idev->cnf.temp_prefered_lft - desync_factor / HZ); |
| 884 | tmp_plen = ifp->prefix_len; |
| 885 | max_addresses = idev->cnf.max_addresses; |
| 886 | tmp_cstamp = ifp->cstamp; |
| 887 | tmp_tstamp = ifp->tstamp; |
| 888 | spin_unlock_bh(&ifp->lock); |
| 889 | |
Benoit Boissinot | eac55bf | 2008-04-02 00:01:35 -0700 | [diff] [blame] | 890 | regen_advance = idev->cnf.regen_max_retry * |
| 891 | idev->cnf.dad_transmits * |
| 892 | idev->nd_parms->retrans_time / HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | write_unlock(&idev->lock); |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 894 | |
Benoit Boissinot | eac55bf | 2008-04-02 00:01:35 -0700 | [diff] [blame] | 895 | /* A temporary address is created only if this calculated Preferred |
| 896 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, |
| 897 | * an implementation must not create a temporary address with a zero |
| 898 | * Preferred Lifetime. |
| 899 | */ |
| 900 | if (tmp_prefered_lft <= regen_advance) { |
| 901 | in6_ifa_put(ifp); |
| 902 | in6_dev_put(idev); |
| 903 | ret = -1; |
| 904 | goto out; |
| 905 | } |
| 906 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 907 | addr_flags = IFA_F_TEMPORARY; |
| 908 | /* set in addrconf_prefix_rcv() */ |
| 909 | if (ifp->flags & IFA_F_OPTIMISTIC) |
| 910 | addr_flags |= IFA_F_OPTIMISTIC; |
| 911 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | ift = !max_addresses || |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 913 | ipv6_count_addresses(idev) < max_addresses ? |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | ipv6_add_addr(idev, &addr, tmp_plen, |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 915 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, |
| 916 | addr_flags) : NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | if (!ift || IS_ERR(ift)) { |
| 918 | in6_ifa_put(ifp); |
| 919 | in6_dev_put(idev); |
| 920 | printk(KERN_INFO |
| 921 | "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); |
| 922 | tmpaddr = &addr; |
| 923 | write_lock(&idev->lock); |
| 924 | goto retry; |
| 925 | } |
| 926 | |
| 927 | spin_lock_bh(&ift->lock); |
| 928 | ift->ifpub = ifp; |
| 929 | ift->valid_lft = tmp_valid_lft; |
| 930 | ift->prefered_lft = tmp_prefered_lft; |
| 931 | ift->cstamp = tmp_cstamp; |
| 932 | ift->tstamp = tmp_tstamp; |
| 933 | spin_unlock_bh(&ift->lock); |
| 934 | |
| 935 | addrconf_dad_start(ift, 0); |
| 936 | in6_ifa_put(ift); |
| 937 | in6_dev_put(idev); |
| 938 | out: |
| 939 | return ret; |
| 940 | } |
| 941 | #endif |
| 942 | |
| 943 | /* |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 944 | * Choose an appropriate source address (RFC3484) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | */ |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 946 | enum { |
| 947 | IPV6_SADDR_RULE_INIT = 0, |
| 948 | IPV6_SADDR_RULE_LOCAL, |
| 949 | IPV6_SADDR_RULE_SCOPE, |
| 950 | IPV6_SADDR_RULE_PREFERRED, |
| 951 | #ifdef CONFIG_IPV6_MIP6 |
| 952 | IPV6_SADDR_RULE_HOA, |
| 953 | #endif |
| 954 | IPV6_SADDR_RULE_OIF, |
| 955 | IPV6_SADDR_RULE_LABEL, |
| 956 | #ifdef CONFIG_IPV6_PRIVACY |
| 957 | IPV6_SADDR_RULE_PRIVACY, |
| 958 | #endif |
| 959 | IPV6_SADDR_RULE_ORCHID, |
| 960 | IPV6_SADDR_RULE_PREFIX, |
| 961 | IPV6_SADDR_RULE_MAX |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 962 | }; |
| 963 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 964 | struct ipv6_saddr_score { |
| 965 | int rule; |
| 966 | int addr_type; |
| 967 | struct inet6_ifaddr *ifa; |
| 968 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); |
| 969 | int scopedist; |
| 970 | int matchlen; |
| 971 | }; |
| 972 | |
| 973 | struct ipv6_saddr_dst { |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 974 | const struct in6_addr *addr; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 975 | int ifindex; |
| 976 | int scope; |
| 977 | int label; |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 978 | unsigned int prefs; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 979 | }; |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 980 | |
Dave Jones | b6f99a2 | 2007-03-22 12:27:49 -0700 | [diff] [blame] | 981 | static inline int ipv6_saddr_preferred(int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | { |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 983 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4| |
| 984 | IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED)) |
| 985 | return 1; |
| 986 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | } |
| 988 | |
Benjamin Thery | 3de2325 | 2008-05-28 14:51:24 +0200 | [diff] [blame] | 989 | static int ipv6_get_saddr_eval(struct net *net, |
| 990 | struct ipv6_saddr_score *score, |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 991 | struct ipv6_saddr_dst *dst, |
| 992 | int i) |
| 993 | { |
| 994 | int ret; |
| 995 | |
| 996 | if (i <= score->rule) { |
| 997 | switch (i) { |
| 998 | case IPV6_SADDR_RULE_SCOPE: |
| 999 | ret = score->scopedist; |
| 1000 | break; |
| 1001 | case IPV6_SADDR_RULE_PREFIX: |
| 1002 | ret = score->matchlen; |
| 1003 | break; |
| 1004 | default: |
| 1005 | ret = !!test_bit(i, score->scorebits); |
| 1006 | } |
| 1007 | goto out; |
| 1008 | } |
| 1009 | |
| 1010 | switch (i) { |
| 1011 | case IPV6_SADDR_RULE_INIT: |
| 1012 | /* Rule 0: remember if hiscore is not ready yet */ |
| 1013 | ret = !!score->ifa; |
| 1014 | break; |
| 1015 | case IPV6_SADDR_RULE_LOCAL: |
| 1016 | /* Rule 1: Prefer same address */ |
| 1017 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); |
| 1018 | break; |
| 1019 | case IPV6_SADDR_RULE_SCOPE: |
| 1020 | /* Rule 2: Prefer appropriate scope |
| 1021 | * |
| 1022 | * ret |
| 1023 | * ^ |
| 1024 | * -1 | d 15 |
| 1025 | * ---+--+-+---> scope |
| 1026 | * | |
| 1027 | * | d is scope of the destination. |
| 1028 | * B-d | \ |
| 1029 | * | \ <- smaller scope is better if |
| 1030 | * B-15 | \ if scope is enough for destinaion. |
| 1031 | * | ret = B - scope (-1 <= scope >= d <= 15). |
| 1032 | * d-C-1 | / |
| 1033 | * |/ <- greater is better |
| 1034 | * -C / if scope is not enough for destination. |
| 1035 | * /| ret = scope - C (-1 <= d < scope <= 15). |
| 1036 | * |
| 1037 | * d - C - 1 < B -15 (for all -1 <= d <= 15). |
| 1038 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. |
| 1039 | * Assume B = 0 and we get C > 29. |
| 1040 | */ |
| 1041 | ret = __ipv6_addr_src_scope(score->addr_type); |
| 1042 | if (ret >= dst->scope) |
| 1043 | ret = -ret; |
| 1044 | else |
| 1045 | ret -= 128; /* 30 is enough */ |
| 1046 | score->scopedist = ret; |
| 1047 | break; |
| 1048 | case IPV6_SADDR_RULE_PREFERRED: |
| 1049 | /* Rule 3: Avoid deprecated and optimistic addresses */ |
| 1050 | ret = ipv6_saddr_preferred(score->addr_type) || |
| 1051 | !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)); |
| 1052 | break; |
| 1053 | #ifdef CONFIG_IPV6_MIP6 |
| 1054 | case IPV6_SADDR_RULE_HOA: |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1055 | { |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1056 | /* Rule 4: Prefer home address */ |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1057 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
| 1058 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1059 | break; |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1060 | } |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1061 | #endif |
| 1062 | case IPV6_SADDR_RULE_OIF: |
| 1063 | /* Rule 5: Prefer outgoing interface */ |
| 1064 | ret = (!dst->ifindex || |
| 1065 | dst->ifindex == score->ifa->idev->dev->ifindex); |
| 1066 | break; |
| 1067 | case IPV6_SADDR_RULE_LABEL: |
| 1068 | /* Rule 6: Prefer matching label */ |
Benjamin Thery | 3de2325 | 2008-05-28 14:51:24 +0200 | [diff] [blame] | 1069 | ret = ipv6_addr_label(net, |
| 1070 | &score->ifa->addr, score->addr_type, |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1071 | score->ifa->idev->dev->ifindex) == dst->label; |
| 1072 | break; |
| 1073 | #ifdef CONFIG_IPV6_PRIVACY |
| 1074 | case IPV6_SADDR_RULE_PRIVACY: |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1075 | { |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1076 | /* Rule 7: Prefer public address |
| 1077 | * Note: prefer temprary address if use_tempaddr >= 2 |
| 1078 | */ |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1079 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
| 1080 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : |
| 1081 | score->ifa->idev->cnf.use_tempaddr >= 2; |
| 1082 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1083 | break; |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1084 | } |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1085 | #endif |
| 1086 | case IPV6_SADDR_RULE_ORCHID: |
| 1087 | /* Rule 8-: Prefer ORCHID vs ORCHID or |
| 1088 | * non-ORCHID vs non-ORCHID |
| 1089 | */ |
| 1090 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ |
| 1091 | ipv6_addr_orchid(dst->addr)); |
| 1092 | break; |
| 1093 | case IPV6_SADDR_RULE_PREFIX: |
| 1094 | /* Rule 8: Use longest matching prefix */ |
| 1095 | score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr, |
| 1096 | dst->addr); |
| 1097 | break; |
| 1098 | default: |
| 1099 | ret = 0; |
| 1100 | } |
| 1101 | |
| 1102 | if (ret) |
| 1103 | __set_bit(i, score->scorebits); |
| 1104 | score->rule = i; |
| 1105 | out: |
| 1106 | return ret; |
| 1107 | } |
| 1108 | |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 1109 | int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev, |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 1110 | const struct in6_addr *daddr, unsigned int prefs, |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1111 | struct in6_addr *saddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | { |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1113 | struct ipv6_saddr_score scores[2], |
| 1114 | *score = &scores[0], *hiscore = &scores[1]; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1115 | struct ipv6_saddr_dst dst; |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1116 | struct net_device *dev; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1117 | int dst_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1119 | dst_type = __ipv6_addr_type(daddr); |
| 1120 | dst.addr = daddr; |
| 1121 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; |
| 1122 | dst.scope = __ipv6_addr_src_scope(dst_type); |
Benjamin Thery | 3de2325 | 2008-05-28 14:51:24 +0200 | [diff] [blame] | 1123 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 1124 | dst.prefs = prefs; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1125 | |
| 1126 | hiscore->rule = -1; |
| 1127 | hiscore->ifa = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1128 | |
| 1129 | read_lock(&dev_base_lock); |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1130 | rcu_read_lock(); |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1131 | |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 1132 | for_each_netdev(net, dev) { |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1133 | struct inet6_dev *idev; |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1134 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1135 | /* Candidate Source Address (section 4) |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1136 | * - multicast and link-local destination address, |
| 1137 | * the set of candidate source address MUST only |
| 1138 | * include addresses assigned to interfaces |
| 1139 | * belonging to the same link as the outgoing |
| 1140 | * interface. |
| 1141 | * (- For site-local destination addresses, the |
| 1142 | * set of candidate source addresses MUST only |
| 1143 | * include addresses assigned to interfaces |
| 1144 | * belonging to the same site as the outgoing |
| 1145 | * interface.) |
| 1146 | */ |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1147 | if (((dst_type & IPV6_ADDR_MULTICAST) || |
| 1148 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && |
| 1149 | dst.ifindex && dev->ifindex != dst.ifindex) |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1150 | continue; |
| 1151 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | idev = __in6_dev_get(dev); |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1153 | if (!idev) |
| 1154 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1155 | |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1156 | read_lock_bh(&idev->lock); |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1157 | for (score->ifa = idev->addr_list; score->ifa; score->ifa = score->ifa->if_next) { |
| 1158 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1160 | /* |
YOSHIFUJI Hideaki | 6b3ae80 | 2005-12-21 22:58:01 +0900 | [diff] [blame] | 1161 | * - Tentative Address (RFC2462 section 5.4) |
| 1162 | * - A tentative address is not considered |
| 1163 | * "assigned to an interface" in the traditional |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1164 | * sense, unless it is also flagged as optimistic. |
YOSHIFUJI Hideaki | 6b3ae80 | 2005-12-21 22:58:01 +0900 | [diff] [blame] | 1165 | * - Candidate Source Address (section 4) |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1166 | * - In any case, anycast addresses, multicast |
| 1167 | * addresses, and the unspecified address MUST |
| 1168 | * NOT be included in a candidate set. |
| 1169 | */ |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1170 | if ((score->ifa->flags & IFA_F_TENTATIVE) && |
| 1171 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) |
YOSHIFUJI Hideaki | 6b3ae80 | 2005-12-21 22:58:01 +0900 | [diff] [blame] | 1172 | continue; |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1173 | |
| 1174 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); |
| 1175 | |
| 1176 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || |
| 1177 | score->addr_type & IPV6_ADDR_MULTICAST)) { |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1178 | LIMIT_NETDEBUG(KERN_DEBUG |
Joe Perches | 3b6d821c | 2007-11-19 23:47:25 -0800 | [diff] [blame] | 1179 | "ADDRCONF: unspecified / multicast address " |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1180 | "assigned as unicast address on %s", |
| 1181 | dev->name); |
| 1182 | continue; |
| 1183 | } |
| 1184 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1185 | score->rule = -1; |
| 1186 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1187 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1188 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { |
| 1189 | int minihiscore, miniscore; |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1190 | |
Benjamin Thery | 3de2325 | 2008-05-28 14:51:24 +0200 | [diff] [blame] | 1191 | minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i); |
| 1192 | miniscore = ipv6_get_saddr_eval(net, score, &dst, i); |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1193 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1194 | if (minihiscore > miniscore) { |
| 1195 | if (i == IPV6_SADDR_RULE_SCOPE && |
| 1196 | score->scopedist > 0) { |
| 1197 | /* |
| 1198 | * special case: |
| 1199 | * each remaining entry |
| 1200 | * has too small (not enough) |
| 1201 | * scope, because ifa entries |
| 1202 | * are sorted by their scope |
| 1203 | * values. |
| 1204 | */ |
| 1205 | goto try_nextdev; |
| 1206 | } |
| 1207 | break; |
| 1208 | } else if (minihiscore < miniscore) { |
| 1209 | struct ipv6_saddr_score *tmp; |
| 1210 | |
| 1211 | if (hiscore->ifa) |
| 1212 | in6_ifa_put(hiscore->ifa); |
| 1213 | |
| 1214 | in6_ifa_hold(score->ifa); |
| 1215 | |
| 1216 | tmp = hiscore; |
| 1217 | hiscore = score; |
| 1218 | score = tmp; |
| 1219 | |
| 1220 | /* restore our iterator */ |
| 1221 | score->ifa = hiscore->ifa; |
| 1222 | |
| 1223 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | } |
| 1225 | } |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1226 | } |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1227 | try_nextdev: |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1228 | read_unlock_bh(&idev->lock); |
| 1229 | } |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1230 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | read_unlock(&dev_base_lock); |
| 1232 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1233 | if (!hiscore->ifa) |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1234 | return -EADDRNOTAVAIL; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1235 | |
YOSHIFUJI Hideaki | a9b0572 | 2008-03-02 10:48:21 +0900 | [diff] [blame] | 1236 | ipv6_addr_copy(saddr, &hiscore->ifa->addr); |
| 1237 | in6_ifa_put(hiscore->ifa); |
YOSHIFUJI Hideaki | 072047e | 2005-11-08 09:38:30 -0800 | [diff] [blame] | 1238 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | } |
| 1240 | |
YOSHIFUJI Hideaki | 5e5f3f0 | 2008-03-03 21:44:34 +0900 | [diff] [blame] | 1241 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1243 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
| 1244 | unsigned char banned_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1245 | { |
| 1246 | struct inet6_dev *idev; |
| 1247 | int err = -EADDRNOTAVAIL; |
| 1248 | |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1249 | rcu_read_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1250 | if ((idev = __in6_dev_get(dev)) != NULL) { |
| 1251 | struct inet6_ifaddr *ifp; |
| 1252 | |
| 1253 | read_lock_bh(&idev->lock); |
| 1254 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1255 | if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | ipv6_addr_copy(addr, &ifp->addr); |
| 1257 | err = 0; |
| 1258 | break; |
| 1259 | } |
| 1260 | } |
| 1261 | read_unlock_bh(&idev->lock); |
| 1262 | } |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1263 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | return err; |
| 1265 | } |
| 1266 | |
| 1267 | static int ipv6_count_addresses(struct inet6_dev *idev) |
| 1268 | { |
| 1269 | int cnt = 0; |
| 1270 | struct inet6_ifaddr *ifp; |
| 1271 | |
| 1272 | read_lock_bh(&idev->lock); |
| 1273 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) |
| 1274 | cnt++; |
| 1275 | read_unlock_bh(&idev->lock); |
| 1276 | return cnt; |
| 1277 | } |
| 1278 | |
Daniel Lezcano | bfeade0 | 2008-01-10 22:43:18 -0800 | [diff] [blame] | 1279 | int ipv6_chk_addr(struct net *net, struct in6_addr *addr, |
| 1280 | struct net_device *dev, int strict) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | { |
| 1282 | struct inet6_ifaddr * ifp; |
| 1283 | u8 hash = ipv6_addr_hash(addr); |
| 1284 | |
| 1285 | read_lock_bh(&addrconf_hash_lock); |
| 1286 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 1287 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
Daniel Lezcano | bfeade0 | 2008-01-10 22:43:18 -0800 | [diff] [blame] | 1288 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | if (ipv6_addr_equal(&ifp->addr, addr) && |
| 1290 | !(ifp->flags&IFA_F_TENTATIVE)) { |
| 1291 | if (dev == NULL || ifp->idev->dev == dev || |
| 1292 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) |
| 1293 | break; |
| 1294 | } |
| 1295 | } |
| 1296 | read_unlock_bh(&addrconf_hash_lock); |
| 1297 | return ifp != NULL; |
| 1298 | } |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 1299 | EXPORT_SYMBOL(ipv6_chk_addr); |
| 1300 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | static |
Daniel Lezcano | 06bfe65 | 2008-01-10 22:43:42 -0800 | [diff] [blame] | 1302 | int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
| 1303 | struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | { |
| 1305 | struct inet6_ifaddr * ifp; |
| 1306 | u8 hash = ipv6_addr_hash(addr); |
| 1307 | |
| 1308 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 1309 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
Daniel Lezcano | 06bfe65 | 2008-01-10 22:43:42 -0800 | [diff] [blame] | 1310 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1311 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
| 1312 | if (dev == NULL || ifp->idev->dev == dev) |
| 1313 | break; |
| 1314 | } |
| 1315 | } |
| 1316 | return ifp != NULL; |
| 1317 | } |
| 1318 | |
YOSHIFUJI Hideaki | 52eeeb8 | 2008-03-15 22:54:23 -0400 | [diff] [blame] | 1319 | int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev) |
| 1320 | { |
| 1321 | struct inet6_dev *idev; |
| 1322 | struct inet6_ifaddr *ifa; |
| 1323 | int onlink; |
| 1324 | |
| 1325 | onlink = 0; |
| 1326 | rcu_read_lock(); |
| 1327 | idev = __in6_dev_get(dev); |
| 1328 | if (idev) { |
| 1329 | read_lock_bh(&idev->lock); |
| 1330 | for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) { |
| 1331 | onlink = ipv6_prefix_equal(addr, &ifa->addr, |
| 1332 | ifa->prefix_len); |
| 1333 | if (onlink) |
| 1334 | break; |
| 1335 | } |
| 1336 | read_unlock_bh(&idev->lock); |
| 1337 | } |
| 1338 | rcu_read_unlock(); |
| 1339 | return onlink; |
| 1340 | } |
| 1341 | |
| 1342 | EXPORT_SYMBOL(ipv6_chk_prefix); |
| 1343 | |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 1344 | 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] | 1345 | struct net_device *dev, int strict) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | { |
| 1347 | struct inet6_ifaddr * ifp; |
| 1348 | u8 hash = ipv6_addr_hash(addr); |
| 1349 | |
| 1350 | read_lock_bh(&addrconf_hash_lock); |
| 1351 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 1352 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
Daniel Lezcano | 1cab3da | 2008-01-10 22:44:09 -0800 | [diff] [blame] | 1353 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
| 1355 | if (dev == NULL || ifp->idev->dev == dev || |
| 1356 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { |
| 1357 | in6_ifa_hold(ifp); |
| 1358 | break; |
| 1359 | } |
| 1360 | } |
| 1361 | } |
| 1362 | read_unlock_bh(&addrconf_hash_lock); |
| 1363 | |
| 1364 | return ifp; |
| 1365 | } |
| 1366 | |
| 1367 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) |
| 1368 | { |
| 1369 | 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] | 1370 | const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); |
Al Viro | 8210323 | 2006-09-27 18:44:10 -0700 | [diff] [blame] | 1371 | __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr; |
| 1372 | __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1373 | int sk_ipv6only = ipv6_only_sock(sk); |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 1374 | int sk2_ipv6only = inet_v6_ipv6only(sk2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | int addr_type = ipv6_addr_type(sk_rcv_saddr6); |
| 1376 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; |
| 1377 | |
| 1378 | if (!sk2_rcv_saddr && !sk_ipv6only) |
| 1379 | return 1; |
| 1380 | |
| 1381 | if (addr_type2 == IPV6_ADDR_ANY && |
| 1382 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) |
| 1383 | return 1; |
| 1384 | |
| 1385 | if (addr_type == IPV6_ADDR_ANY && |
| 1386 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) |
| 1387 | return 1; |
| 1388 | |
| 1389 | if (sk2_rcv_saddr6 && |
| 1390 | ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) |
| 1391 | return 1; |
| 1392 | |
| 1393 | if (addr_type == IPV6_ADDR_MAPPED && |
| 1394 | !sk2_ipv6only && |
| 1395 | (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr)) |
| 1396 | return 1; |
| 1397 | |
| 1398 | return 0; |
| 1399 | } |
| 1400 | |
| 1401 | /* Gets referenced address, destroys ifaddr */ |
| 1402 | |
Adrian Bunk | 9f5336e | 2006-01-07 13:24:25 -0800 | [diff] [blame] | 1403 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1404 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1405 | if (ifp->flags&IFA_F_PERMANENT) { |
| 1406 | spin_lock_bh(&ifp->lock); |
| 1407 | addrconf_del_timer(ifp); |
| 1408 | ifp->flags |= IFA_F_TENTATIVE; |
| 1409 | spin_unlock_bh(&ifp->lock); |
| 1410 | in6_ifa_put(ifp); |
| 1411 | #ifdef CONFIG_IPV6_PRIVACY |
| 1412 | } else if (ifp->flags&IFA_F_TEMPORARY) { |
| 1413 | struct inet6_ifaddr *ifpub; |
| 1414 | spin_lock_bh(&ifp->lock); |
| 1415 | ifpub = ifp->ifpub; |
| 1416 | if (ifpub) { |
| 1417 | in6_ifa_hold(ifpub); |
| 1418 | spin_unlock_bh(&ifp->lock); |
| 1419 | ipv6_create_tempaddr(ifpub, ifp); |
| 1420 | in6_ifa_put(ifpub); |
| 1421 | } else { |
| 1422 | spin_unlock_bh(&ifp->lock); |
| 1423 | } |
| 1424 | ipv6_del_addr(ifp); |
| 1425 | #endif |
| 1426 | } else |
| 1427 | ipv6_del_addr(ifp); |
| 1428 | } |
| 1429 | |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 1430 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
| 1431 | { |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 1432 | struct inet6_dev *idev = ifp->idev; |
| 1433 | if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) { |
| 1434 | struct in6_addr addr; |
| 1435 | |
| 1436 | addr.s6_addr32[0] = htonl(0xfe800000); |
| 1437 | addr.s6_addr32[1] = 0; |
| 1438 | |
| 1439 | if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && |
| 1440 | ipv6_addr_equal(&ifp->addr, &addr)) { |
| 1441 | /* DAD failed for link-local based on MAC address */ |
| 1442 | idev->cnf.disable_ipv6 = 1; |
| 1443 | } |
| 1444 | } |
| 1445 | |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 1446 | if (net_ratelimit()) |
| 1447 | printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name); |
| 1448 | addrconf_dad_stop(ifp); |
| 1449 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | |
| 1451 | /* Join to solicited addr multicast group. */ |
| 1452 | |
| 1453 | void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) |
| 1454 | { |
| 1455 | struct in6_addr maddr; |
| 1456 | |
| 1457 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) |
| 1458 | return; |
| 1459 | |
| 1460 | addrconf_addr_solict_mult(addr, &maddr); |
| 1461 | ipv6_dev_mc_inc(dev, &maddr); |
| 1462 | } |
| 1463 | |
| 1464 | void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) |
| 1465 | { |
| 1466 | struct in6_addr maddr; |
| 1467 | |
| 1468 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) |
| 1469 | return; |
| 1470 | |
| 1471 | addrconf_addr_solict_mult(addr, &maddr); |
| 1472 | __ipv6_dev_mc_dec(idev, &maddr); |
| 1473 | } |
| 1474 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 1475 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1476 | { |
| 1477 | struct in6_addr addr; |
| 1478 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
| 1479 | if (ipv6_addr_any(&addr)) |
| 1480 | return; |
| 1481 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); |
| 1482 | } |
| 1483 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 1484 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1485 | { |
| 1486 | struct in6_addr addr; |
| 1487 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
| 1488 | if (ipv6_addr_any(&addr)) |
| 1489 | return; |
| 1490 | __ipv6_dev_ac_dec(ifp->idev, &addr); |
| 1491 | } |
| 1492 | |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 1493 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
| 1494 | { |
| 1495 | if (dev->addr_len != ETH_ALEN) |
| 1496 | return -1; |
| 1497 | memcpy(eui, dev->dev_addr, 3); |
| 1498 | memcpy(eui + 5, dev->dev_addr + 3, 3); |
| 1499 | |
| 1500 | /* |
| 1501 | * The zSeries OSA network cards can be shared among various |
| 1502 | * OS instances, but the OSA cards have only one MAC address. |
| 1503 | * This leads to duplicate address conflicts in conjunction |
| 1504 | * with IPv6 if more than one instance uses the same card. |
| 1505 | * |
| 1506 | * The driver for these cards can deliver a unique 16-bit |
| 1507 | * identifier for each instance sharing the same card. It is |
| 1508 | * placed instead of 0xFFFE in the interface identifier. The |
| 1509 | * "u" bit of the interface identifier is not inverted in this |
| 1510 | * case. Hence the resulting interface identifier has local |
| 1511 | * scope according to RFC2373. |
| 1512 | */ |
| 1513 | if (dev->dev_id) { |
| 1514 | eui[3] = (dev->dev_id >> 8) & 0xFF; |
| 1515 | eui[4] = dev->dev_id & 0xFF; |
| 1516 | } else { |
| 1517 | eui[3] = 0xFF; |
| 1518 | eui[4] = 0xFE; |
| 1519 | eui[0] ^= 2; |
| 1520 | } |
| 1521 | return 0; |
| 1522 | } |
| 1523 | |
| 1524 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) |
| 1525 | { |
| 1526 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ |
| 1527 | if (dev->addr_len != ARCNET_ALEN) |
| 1528 | return -1; |
| 1529 | memset(eui, 0, 7); |
| 1530 | eui[7] = *(u8*)dev->dev_addr; |
| 1531 | return 0; |
| 1532 | } |
| 1533 | |
| 1534 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) |
| 1535 | { |
| 1536 | if (dev->addr_len != INFINIBAND_ALEN) |
| 1537 | return -1; |
| 1538 | memcpy(eui, dev->dev_addr + 12, 8); |
| 1539 | eui[0] |= 2; |
| 1540 | return 0; |
| 1541 | } |
| 1542 | |
YOSHIFUJI Hideaki | dfd982b | 2008-04-10 15:42:09 +0900 | [diff] [blame] | 1543 | int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
| 1544 | { |
| 1545 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || |
| 1546 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || |
| 1547 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || |
| 1548 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || |
| 1549 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || |
| 1550 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; |
| 1551 | eui[1] = 0; |
| 1552 | eui[2] = 0x5E; |
| 1553 | eui[3] = 0xFE; |
| 1554 | memcpy(eui + 4, &addr, 4); |
| 1555 | return 0; |
| 1556 | } |
| 1557 | EXPORT_SYMBOL(__ipv6_isatap_ifid); |
| 1558 | |
| 1559 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) |
| 1560 | { |
| 1561 | if (dev->priv_flags & IFF_ISATAP) |
| 1562 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); |
| 1563 | return -1; |
| 1564 | } |
| 1565 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1566 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
| 1567 | { |
| 1568 | switch (dev->type) { |
| 1569 | case ARPHRD_ETHER: |
| 1570 | case ARPHRD_FDDI: |
| 1571 | case ARPHRD_IEEE802_TR: |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 1572 | return addrconf_ifid_eui48(eui, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1573 | case ARPHRD_ARCNET: |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 1574 | return addrconf_ifid_arcnet(eui, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1575 | case ARPHRD_INFINIBAND: |
YOSHIFUJI Hideaki | 073a8e0 | 2006-03-20 16:54:49 -0800 | [diff] [blame] | 1576 | return addrconf_ifid_infiniband(eui, dev); |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 1577 | case ARPHRD_SIT: |
YOSHIFUJI Hideaki | dfd982b | 2008-04-10 15:42:09 +0900 | [diff] [blame] | 1578 | return addrconf_ifid_sit(eui, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1579 | } |
| 1580 | return -1; |
| 1581 | } |
| 1582 | |
| 1583 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) |
| 1584 | { |
| 1585 | int err = -1; |
| 1586 | struct inet6_ifaddr *ifp; |
| 1587 | |
| 1588 | read_lock_bh(&idev->lock); |
| 1589 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { |
| 1590 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { |
| 1591 | memcpy(eui, ifp->addr.s6_addr+8, 8); |
| 1592 | err = 0; |
| 1593 | break; |
| 1594 | } |
| 1595 | } |
| 1596 | read_unlock_bh(&idev->lock); |
| 1597 | return err; |
| 1598 | } |
| 1599 | |
| 1600 | #ifdef CONFIG_IPV6_PRIVACY |
| 1601 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ |
| 1602 | static int __ipv6_regen_rndid(struct inet6_dev *idev) |
| 1603 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1604 | regen: |
YOSHIFUJI Hideaki | 955189e | 2006-03-20 16:54:09 -0800 | [diff] [blame] | 1605 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1606 | idev->rndid[0] &= ~0x02; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1607 | |
| 1608 | /* |
| 1609 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: |
| 1610 | * check if generated address is not inappropriate |
| 1611 | * |
| 1612 | * - Reserved subnet anycast (RFC 2526) |
| 1613 | * 11111101 11....11 1xxxxxxx |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 1614 | * - ISATAP (RFC4214) 6.1 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1615 | * 00-00-5E-FE-xx-xx-xx-xx |
| 1616 | * - value 0 |
| 1617 | * - XXX: already assigned to an address on the device |
| 1618 | */ |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1619 | if (idev->rndid[0] == 0xfd && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1620 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
| 1621 | (idev->rndid[7]&0x80)) |
| 1622 | goto regen; |
| 1623 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { |
| 1624 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) |
| 1625 | goto regen; |
| 1626 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) |
| 1627 | goto regen; |
| 1628 | } |
| 1629 | |
| 1630 | return 0; |
| 1631 | } |
| 1632 | |
| 1633 | static void ipv6_regen_rndid(unsigned long data) |
| 1634 | { |
| 1635 | struct inet6_dev *idev = (struct inet6_dev *) data; |
| 1636 | unsigned long expires; |
| 1637 | |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1638 | rcu_read_lock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1639 | write_lock_bh(&idev->lock); |
| 1640 | |
| 1641 | if (idev->dead) |
| 1642 | goto out; |
| 1643 | |
| 1644 | if (__ipv6_regen_rndid(idev) < 0) |
| 1645 | goto out; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1646 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1647 | expires = jiffies + |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1648 | idev->cnf.temp_prefered_lft * HZ - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1649 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; |
| 1650 | if (time_before(expires, jiffies)) { |
| 1651 | printk(KERN_WARNING |
| 1652 | "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", |
| 1653 | idev->dev->name); |
| 1654 | goto out; |
| 1655 | } |
| 1656 | |
| 1657 | if (!mod_timer(&idev->regen_timer, expires)) |
| 1658 | in6_dev_hold(idev); |
| 1659 | |
| 1660 | out: |
| 1661 | write_unlock_bh(&idev->lock); |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 1662 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1663 | in6_dev_put(idev); |
| 1664 | } |
| 1665 | |
| 1666 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { |
| 1667 | int ret = 0; |
| 1668 | |
| 1669 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) |
| 1670 | ret = __ipv6_regen_rndid(idev); |
| 1671 | return ret; |
| 1672 | } |
| 1673 | #endif |
| 1674 | |
| 1675 | /* |
| 1676 | * Add prefix route. |
| 1677 | */ |
| 1678 | |
| 1679 | static void |
| 1680 | 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] | 1681 | unsigned long expires, u32 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1682 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1683 | struct fib6_config cfg = { |
| 1684 | .fc_table = RT6_TABLE_PREFIX, |
| 1685 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
| 1686 | .fc_ifindex = dev->ifindex, |
| 1687 | .fc_expires = expires, |
| 1688 | .fc_dst_len = plen, |
| 1689 | .fc_flags = RTF_UP | flags, |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1690 | .fc_nlinfo.nl_net = dev_net(dev), |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1691 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1692 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1693 | ipv6_addr_copy(&cfg.fc_dst, pfx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1694 | |
| 1695 | /* Prevent useless cloning on PtP SIT. |
| 1696 | This thing is done here expecting that the whole |
| 1697 | class of non-broadcast devices need not cloning. |
| 1698 | */ |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 1699 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1700 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
| 1701 | cfg.fc_flags |= RTF_NONEXTHOP; |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 1702 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1703 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1704 | ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1705 | } |
| 1706 | |
| 1707 | /* Create "default" multicast route to the interface */ |
| 1708 | |
| 1709 | static void addrconf_add_mroute(struct net_device *dev) |
| 1710 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1711 | struct fib6_config cfg = { |
| 1712 | .fc_table = RT6_TABLE_LOCAL, |
| 1713 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
| 1714 | .fc_ifindex = dev->ifindex, |
| 1715 | .fc_dst_len = 8, |
| 1716 | .fc_flags = RTF_UP, |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1717 | .fc_nlinfo.nl_net = dev_net(dev), |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1718 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1719 | |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1720 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); |
| 1721 | |
| 1722 | ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1723 | } |
| 1724 | |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 1725 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1726 | static void sit_route_add(struct net_device *dev) |
| 1727 | { |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1728 | struct fib6_config cfg = { |
| 1729 | .fc_table = RT6_TABLE_MAIN, |
| 1730 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
| 1731 | .fc_ifindex = dev->ifindex, |
| 1732 | .fc_dst_len = 96, |
| 1733 | .fc_flags = RTF_UP | RTF_NONEXTHOP, |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1734 | .fc_nlinfo.nl_net = dev_net(dev), |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1735 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1736 | |
| 1737 | /* prefix length - 96 bits "::d.d.d.d" */ |
Thomas Graf | 86872cb | 2006-08-22 00:01:08 -0700 | [diff] [blame] | 1738 | ip6_route_add(&cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1739 | } |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 1740 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1741 | |
| 1742 | static void addrconf_add_lroute(struct net_device *dev) |
| 1743 | { |
| 1744 | struct in6_addr addr; |
| 1745 | |
| 1746 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); |
| 1747 | addrconf_prefix_route(&addr, 64, dev, 0, 0); |
| 1748 | } |
| 1749 | |
| 1750 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) |
| 1751 | { |
| 1752 | struct inet6_dev *idev; |
| 1753 | |
| 1754 | ASSERT_RTNL(); |
| 1755 | |
| 1756 | if ((idev = ipv6_find_idev(dev)) == NULL) |
| 1757 | return NULL; |
| 1758 | |
| 1759 | /* Add default multicast route */ |
| 1760 | addrconf_add_mroute(dev); |
| 1761 | |
| 1762 | /* Add link local route */ |
| 1763 | addrconf_add_lroute(dev); |
| 1764 | return idev; |
| 1765 | } |
| 1766 | |
| 1767 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) |
| 1768 | { |
| 1769 | struct prefix_info *pinfo; |
| 1770 | __u32 valid_lft; |
| 1771 | __u32 prefered_lft; |
| 1772 | int addr_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1773 | struct inet6_dev *in6_dev; |
| 1774 | |
| 1775 | pinfo = (struct prefix_info *) opt; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1776 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1777 | if (len < sizeof(struct prefix_info)) { |
| 1778 | ADBG(("addrconf: prefix option too short\n")); |
| 1779 | return; |
| 1780 | } |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1781 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1782 | /* |
| 1783 | * Validation checks ([ADDRCONF], page 19) |
| 1784 | */ |
| 1785 | |
| 1786 | addr_type = ipv6_addr_type(&pinfo->prefix); |
| 1787 | |
| 1788 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) |
| 1789 | return; |
| 1790 | |
| 1791 | valid_lft = ntohl(pinfo->valid); |
| 1792 | prefered_lft = ntohl(pinfo->prefered); |
| 1793 | |
| 1794 | if (prefered_lft > valid_lft) { |
| 1795 | if (net_ratelimit()) |
| 1796 | printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); |
| 1797 | return; |
| 1798 | } |
| 1799 | |
| 1800 | in6_dev = in6_dev_get(dev); |
| 1801 | |
| 1802 | if (in6_dev == NULL) { |
| 1803 | if (net_ratelimit()) |
| 1804 | printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); |
| 1805 | return; |
| 1806 | } |
| 1807 | |
| 1808 | /* |
| 1809 | * Two things going on here: |
| 1810 | * 1) Add routes for on-link prefixes |
| 1811 | * 2) Configure prefixes with the auto flag set |
| 1812 | */ |
| 1813 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 1814 | if (pinfo->onlink) { |
| 1815 | struct rt6_info *rt; |
| 1816 | unsigned long rt_expires; |
| 1817 | |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 1818 | /* Avoid arithmetic overflow. Really, we could |
| 1819 | * save rt_expires in seconds, likely valid_lft, |
| 1820 | * but it would require division in fib gc, that it |
| 1821 | * not good. |
| 1822 | */ |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 1823 | if (HZ > USER_HZ) |
| 1824 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); |
| 1825 | else |
| 1826 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); |
YOSHIFUJI Hideaki | 3dd4bc6 | 2005-12-19 14:02:45 -0800 | [diff] [blame] | 1827 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 1828 | if (addrconf_finite_timeout(rt_expires)) |
| 1829 | rt_expires *= HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1830 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1831 | rt = rt6_lookup(dev_net(dev), &pinfo->prefix, NULL, |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 1832 | dev->ifindex, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1833 | |
YOSHIFUJI Hideaki | 2b5ead4 | 2008-05-13 01:16:24 +0900 | [diff] [blame] | 1834 | if (rt && addrconf_is_prefix_route(rt)) { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 1835 | /* Autoconf prefix route */ |
| 1836 | if (valid_lft == 0) { |
| 1837 | ip6_del_rt(rt); |
| 1838 | rt = NULL; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 1839 | } else if (addrconf_finite_timeout(rt_expires)) { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 1840 | /* not infinity */ |
| 1841 | rt->rt6i_expires = jiffies + rt_expires; |
| 1842 | rt->rt6i_flags |= RTF_EXPIRES; |
| 1843 | } else { |
| 1844 | rt->rt6i_flags &= ~RTF_EXPIRES; |
| 1845 | rt->rt6i_expires = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1846 | } |
| 1847 | } else if (valid_lft) { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 1848 | clock_t expires = 0; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 1849 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
| 1850 | if (addrconf_finite_timeout(rt_expires)) { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 1851 | /* not infinity */ |
| 1852 | flags |= RTF_EXPIRES; |
| 1853 | expires = jiffies_to_clock_t(rt_expires); |
| 1854 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1855 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 1856 | dev, expires, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1857 | } |
| 1858 | if (rt) |
| 1859 | dst_release(&rt->u.dst); |
| 1860 | } |
| 1861 | |
| 1862 | /* Try to figure out our local address for this prefix */ |
| 1863 | |
| 1864 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { |
| 1865 | struct inet6_ifaddr * ifp; |
| 1866 | struct in6_addr addr; |
| 1867 | int create = 0, update_lft = 0; |
YOSHIFUJI Hideaki | 53b7997 | 2008-07-19 22:35:03 -0700 | [diff] [blame] | 1868 | struct net *net = dev_net(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1869 | |
| 1870 | if (pinfo->prefix_len == 64) { |
| 1871 | memcpy(&addr, &pinfo->prefix, 8); |
| 1872 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && |
| 1873 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { |
| 1874 | in6_dev_put(in6_dev); |
| 1875 | return; |
| 1876 | } |
| 1877 | goto ok; |
| 1878 | } |
| 1879 | if (net_ratelimit()) |
| 1880 | printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", |
| 1881 | pinfo->prefix_len); |
| 1882 | in6_dev_put(in6_dev); |
| 1883 | return; |
| 1884 | |
| 1885 | ok: |
| 1886 | |
YOSHIFUJI Hideaki | 53b7997 | 2008-07-19 22:35:03 -0700 | [diff] [blame] | 1887 | ifp = ipv6_get_ifaddr(net, &addr, dev, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1888 | |
| 1889 | if (ifp == NULL && valid_lft) { |
| 1890 | int max_addresses = in6_dev->cnf.max_addresses; |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1891 | u32 addr_flags = 0; |
| 1892 | |
| 1893 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 1894 | if (in6_dev->cnf.optimistic_dad && |
YOSHIFUJI Hideaki | 53b7997 | 2008-07-19 22:35:03 -0700 | [diff] [blame] | 1895 | !net->ipv6.devconf_all->forwarding) |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1896 | addr_flags = IFA_F_OPTIMISTIC; |
| 1897 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1898 | |
| 1899 | /* Do not allow to create too much of autoconfigured |
| 1900 | * addresses; this would be too easy way to crash kernel. |
| 1901 | */ |
| 1902 | if (!max_addresses || |
| 1903 | ipv6_count_addresses(in6_dev) < max_addresses) |
| 1904 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1905 | addr_type&IPV6_ADDR_SCOPE_MASK, |
| 1906 | addr_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1907 | |
| 1908 | if (!ifp || IS_ERR(ifp)) { |
| 1909 | in6_dev_put(in6_dev); |
| 1910 | return; |
| 1911 | } |
| 1912 | |
| 1913 | update_lft = create = 1; |
| 1914 | ifp->cstamp = jiffies; |
| 1915 | addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); |
| 1916 | } |
| 1917 | |
| 1918 | if (ifp) { |
| 1919 | int flags; |
| 1920 | unsigned long now; |
| 1921 | #ifdef CONFIG_IPV6_PRIVACY |
| 1922 | struct inet6_ifaddr *ift; |
| 1923 | #endif |
| 1924 | u32 stored_lft; |
| 1925 | |
| 1926 | /* update lifetime (RFC2462 5.5.3 e) */ |
| 1927 | spin_lock(&ifp->lock); |
| 1928 | now = jiffies; |
| 1929 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) |
| 1930 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; |
| 1931 | else |
| 1932 | stored_lft = 0; |
| 1933 | if (!update_lft && stored_lft) { |
| 1934 | if (valid_lft > MIN_VALID_LIFETIME || |
| 1935 | valid_lft > stored_lft) |
| 1936 | update_lft = 1; |
| 1937 | else if (stored_lft <= MIN_VALID_LIFETIME) { |
| 1938 | /* valid_lft <= stored_lft is always true */ |
| 1939 | /* XXX: IPsec */ |
| 1940 | update_lft = 0; |
| 1941 | } else { |
| 1942 | valid_lft = MIN_VALID_LIFETIME; |
| 1943 | if (valid_lft < prefered_lft) |
| 1944 | prefered_lft = valid_lft; |
| 1945 | update_lft = 1; |
| 1946 | } |
| 1947 | } |
| 1948 | |
| 1949 | if (update_lft) { |
| 1950 | ifp->valid_lft = valid_lft; |
| 1951 | ifp->prefered_lft = prefered_lft; |
| 1952 | ifp->tstamp = now; |
| 1953 | flags = ifp->flags; |
| 1954 | ifp->flags &= ~IFA_F_DEPRECATED; |
| 1955 | spin_unlock(&ifp->lock); |
| 1956 | |
| 1957 | if (!(flags&IFA_F_TENTATIVE)) |
| 1958 | ipv6_ifa_notify(0, ifp); |
| 1959 | } else |
| 1960 | spin_unlock(&ifp->lock); |
| 1961 | |
| 1962 | #ifdef CONFIG_IPV6_PRIVACY |
| 1963 | read_lock_bh(&in6_dev->lock); |
| 1964 | /* update all temporary addresses in the list */ |
| 1965 | for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) { |
| 1966 | /* |
| 1967 | * When adjusting the lifetimes of an existing |
| 1968 | * temporary address, only lower the lifetimes. |
| 1969 | * Implementations must not increase the |
| 1970 | * lifetimes of an existing temporary address |
| 1971 | * when processing a Prefix Information Option. |
| 1972 | */ |
Benoit Boissinot | c6fbfac | 2008-04-02 00:00:58 -0700 | [diff] [blame] | 1973 | if (ifp != ift->ifpub) |
| 1974 | continue; |
| 1975 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1976 | spin_lock(&ift->lock); |
| 1977 | flags = ift->flags; |
| 1978 | if (ift->valid_lft > valid_lft && |
| 1979 | ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) |
| 1980 | ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; |
| 1981 | if (ift->prefered_lft > prefered_lft && |
| 1982 | ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) |
| 1983 | ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; |
| 1984 | spin_unlock(&ift->lock); |
| 1985 | if (!(flags&IFA_F_TENTATIVE)) |
| 1986 | ipv6_ifa_notify(0, ift); |
| 1987 | } |
| 1988 | |
| 1989 | if (create && in6_dev->cnf.use_tempaddr > 0) { |
| 1990 | /* |
| 1991 | * When a new public address is created as described in [ADDRCONF], |
| 1992 | * also create a new temporary address. |
| 1993 | */ |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1994 | read_unlock_bh(&in6_dev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1995 | ipv6_create_tempaddr(ifp, NULL); |
| 1996 | } else { |
| 1997 | read_unlock_bh(&in6_dev->lock); |
| 1998 | } |
| 1999 | #endif |
| 2000 | in6_ifa_put(ifp); |
| 2001 | addrconf_verify(0); |
| 2002 | } |
| 2003 | } |
| 2004 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); |
| 2005 | in6_dev_put(in6_dev); |
| 2006 | } |
| 2007 | |
| 2008 | /* |
| 2009 | * Set destination address. |
| 2010 | * Special case for SIT interfaces where we create a new "virtual" |
| 2011 | * device. |
| 2012 | */ |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2013 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2014 | { |
| 2015 | struct in6_ifreq ireq; |
| 2016 | struct net_device *dev; |
| 2017 | int err = -EINVAL; |
| 2018 | |
| 2019 | rtnl_lock(); |
| 2020 | |
| 2021 | err = -EFAULT; |
| 2022 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
| 2023 | goto err_exit; |
| 2024 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2025 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2026 | |
| 2027 | err = -ENODEV; |
| 2028 | if (dev == NULL) |
| 2029 | goto err_exit; |
| 2030 | |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2031 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2032 | if (dev->type == ARPHRD_SIT) { |
| 2033 | struct ifreq ifr; |
| 2034 | mm_segment_t oldfs; |
| 2035 | struct ip_tunnel_parm p; |
| 2036 | |
| 2037 | err = -EADDRNOTAVAIL; |
| 2038 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) |
| 2039 | goto err_exit; |
| 2040 | |
| 2041 | memset(&p, 0, sizeof(p)); |
| 2042 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; |
| 2043 | p.iph.saddr = 0; |
| 2044 | p.iph.version = 4; |
| 2045 | p.iph.ihl = 5; |
| 2046 | p.iph.protocol = IPPROTO_IPV6; |
| 2047 | p.iph.ttl = 64; |
Stephen Hemminger | d20b310 | 2008-01-21 00:48:43 -0800 | [diff] [blame] | 2048 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2049 | |
| 2050 | oldfs = get_fs(); set_fs(KERNEL_DS); |
| 2051 | err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL); |
| 2052 | set_fs(oldfs); |
| 2053 | |
| 2054 | if (err == 0) { |
| 2055 | err = -ENOBUFS; |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2056 | dev = __dev_get_by_name(net, p.name); |
| 2057 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2058 | goto err_exit; |
| 2059 | err = dev_open(dev); |
| 2060 | } |
| 2061 | } |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2062 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2063 | |
| 2064 | err_exit: |
| 2065 | rtnl_unlock(); |
| 2066 | return err; |
| 2067 | } |
| 2068 | |
| 2069 | /* |
| 2070 | * Manual configuration of address on an interface |
| 2071 | */ |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2072 | 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] | 2073 | unsigned int plen, __u8 ifa_flags, __u32 prefered_lft, |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2074 | __u32 valid_lft) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2075 | { |
| 2076 | struct inet6_ifaddr *ifp; |
| 2077 | struct inet6_dev *idev; |
| 2078 | struct net_device *dev; |
| 2079 | int scope; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2080 | u32 flags; |
| 2081 | clock_t expires; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2082 | unsigned long timeout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2083 | |
| 2084 | ASSERT_RTNL(); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2085 | |
Thomas Graf | 24ef0da | 2008-05-28 16:54:22 +0200 | [diff] [blame] | 2086 | if (plen > 128) |
| 2087 | return -EINVAL; |
| 2088 | |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2089 | /* check the lifetime */ |
| 2090 | if (!valid_lft || prefered_lft > valid_lft) |
| 2091 | return -EINVAL; |
| 2092 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2093 | dev = __dev_get_by_index(net, ifindex); |
| 2094 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2095 | return -ENODEV; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2096 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2097 | if ((idev = addrconf_add_dev(dev)) == NULL) |
| 2098 | return -ENOBUFS; |
| 2099 | |
| 2100 | scope = ipv6_addr_scope(pfx); |
| 2101 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2102 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
| 2103 | if (addrconf_finite_timeout(timeout)) { |
| 2104 | expires = jiffies_to_clock_t(timeout * HZ); |
| 2105 | valid_lft = timeout; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2106 | flags = RTF_EXPIRES; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2107 | } else { |
| 2108 | expires = 0; |
| 2109 | flags = 0; |
| 2110 | ifa_flags |= IFA_F_PERMANENT; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2111 | } |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2112 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 2113 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
| 2114 | if (addrconf_finite_timeout(timeout)) { |
| 2115 | if (timeout == 0) |
| 2116 | ifa_flags |= IFA_F_DEPRECATED; |
| 2117 | prefered_lft = timeout; |
| 2118 | } |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2119 | |
| 2120 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); |
| 2121 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2122 | if (!IS_ERR(ifp)) { |
Herbert Xu | 06aebfb | 2006-08-09 16:52:04 -0700 | [diff] [blame] | 2123 | spin_lock_bh(&ifp->lock); |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2124 | ifp->valid_lft = valid_lft; |
| 2125 | ifp->prefered_lft = prefered_lft; |
| 2126 | ifp->tstamp = jiffies; |
Herbert Xu | 06aebfb | 2006-08-09 16:52:04 -0700 | [diff] [blame] | 2127 | spin_unlock_bh(&ifp->lock); |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2128 | |
YOSHIFUJI Hideaki | 46d4804 | 2007-02-07 20:36:26 +0900 | [diff] [blame] | 2129 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 2130 | expires, flags); |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2131 | /* |
| 2132 | * Note that section 3.1 of RFC 4429 indicates |
| 2133 | * that the Optimistic flag should not be set for |
| 2134 | * manually configured addresses |
| 2135 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2136 | addrconf_dad_start(ifp, 0); |
| 2137 | in6_ifa_put(ifp); |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 2138 | addrconf_verify(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2139 | return 0; |
| 2140 | } |
| 2141 | |
| 2142 | return PTR_ERR(ifp); |
| 2143 | } |
| 2144 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2145 | 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] | 2146 | unsigned int plen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2147 | { |
| 2148 | struct inet6_ifaddr *ifp; |
| 2149 | struct inet6_dev *idev; |
| 2150 | struct net_device *dev; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2151 | |
Thomas Graf | 24ef0da | 2008-05-28 16:54:22 +0200 | [diff] [blame] | 2152 | if (plen > 128) |
| 2153 | return -EINVAL; |
| 2154 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2155 | dev = __dev_get_by_index(net, ifindex); |
| 2156 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2157 | return -ENODEV; |
| 2158 | |
| 2159 | if ((idev = __in6_dev_get(dev)) == NULL) |
| 2160 | return -ENXIO; |
| 2161 | |
| 2162 | read_lock_bh(&idev->lock); |
| 2163 | for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) { |
| 2164 | if (ifp->prefix_len == plen && |
| 2165 | ipv6_addr_equal(pfx, &ifp->addr)) { |
| 2166 | in6_ifa_hold(ifp); |
| 2167 | read_unlock_bh(&idev->lock); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2168 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2169 | ipv6_del_addr(ifp); |
| 2170 | |
| 2171 | /* If the last address is deleted administratively, |
| 2172 | disable IPv6 on this interface. |
| 2173 | */ |
| 2174 | if (idev->addr_list == NULL) |
| 2175 | addrconf_ifdown(idev->dev, 1); |
| 2176 | return 0; |
| 2177 | } |
| 2178 | } |
| 2179 | read_unlock_bh(&idev->lock); |
| 2180 | return -EADDRNOTAVAIL; |
| 2181 | } |
| 2182 | |
| 2183 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2184 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2185 | { |
| 2186 | struct in6_ifreq ireq; |
| 2187 | int err; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2188 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2189 | if (!capable(CAP_NET_ADMIN)) |
| 2190 | return -EPERM; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2191 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2192 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
| 2193 | return -EFAULT; |
| 2194 | |
| 2195 | rtnl_lock(); |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2196 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
| 2197 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, |
| 2198 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2199 | rtnl_unlock(); |
| 2200 | return err; |
| 2201 | } |
| 2202 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2203 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2204 | { |
| 2205 | struct in6_ifreq ireq; |
| 2206 | int err; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2207 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2208 | if (!capable(CAP_NET_ADMIN)) |
| 2209 | return -EPERM; |
| 2210 | |
| 2211 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
| 2212 | return -EFAULT; |
| 2213 | |
| 2214 | rtnl_lock(); |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 2215 | err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
| 2216 | ireq.ifr6_prefixlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2217 | rtnl_unlock(); |
| 2218 | return err; |
| 2219 | } |
| 2220 | |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2221 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2222 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
| 2223 | { |
| 2224 | struct inet6_ifaddr * ifp; |
| 2225 | struct in6_addr addr; |
| 2226 | struct net_device *dev; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2227 | struct net *net = dev_net(idev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2228 | int scope; |
| 2229 | |
| 2230 | ASSERT_RTNL(); |
| 2231 | |
| 2232 | memset(&addr, 0, sizeof(struct in6_addr)); |
| 2233 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); |
| 2234 | |
| 2235 | if (idev->dev->flags&IFF_POINTOPOINT) { |
| 2236 | addr.s6_addr32[0] = htonl(0xfe800000); |
| 2237 | scope = IFA_LINK; |
| 2238 | } else { |
| 2239 | scope = IPV6_ADDR_COMPATv4; |
| 2240 | } |
| 2241 | |
| 2242 | if (addr.s6_addr32[3]) { |
| 2243 | ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT); |
| 2244 | if (!IS_ERR(ifp)) { |
| 2245 | spin_lock_bh(&ifp->lock); |
| 2246 | ifp->flags &= ~IFA_F_TENTATIVE; |
| 2247 | spin_unlock_bh(&ifp->lock); |
| 2248 | ipv6_ifa_notify(RTM_NEWADDR, ifp); |
| 2249 | in6_ifa_put(ifp); |
| 2250 | } |
| 2251 | return; |
| 2252 | } |
| 2253 | |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 2254 | for_each_netdev(net, dev) { |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 2255 | struct in_device * in_dev = __in_dev_get_rtnl(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2256 | if (in_dev && (dev->flags & IFF_UP)) { |
| 2257 | struct in_ifaddr * ifa; |
| 2258 | |
| 2259 | int flag = scope; |
| 2260 | |
| 2261 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { |
| 2262 | int plen; |
| 2263 | |
| 2264 | addr.s6_addr32[3] = ifa->ifa_local; |
| 2265 | |
| 2266 | if (ifa->ifa_scope == RT_SCOPE_LINK) |
| 2267 | continue; |
| 2268 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { |
| 2269 | if (idev->dev->flags&IFF_POINTOPOINT) |
| 2270 | continue; |
| 2271 | flag |= IFA_HOST; |
| 2272 | } |
| 2273 | if (idev->dev->flags&IFF_POINTOPOINT) |
| 2274 | plen = 64; |
| 2275 | else |
| 2276 | plen = 96; |
| 2277 | |
| 2278 | ifp = ipv6_add_addr(idev, &addr, plen, flag, |
| 2279 | IFA_F_PERMANENT); |
| 2280 | if (!IS_ERR(ifp)) { |
| 2281 | spin_lock_bh(&ifp->lock); |
| 2282 | ifp->flags &= ~IFA_F_TENTATIVE; |
| 2283 | spin_unlock_bh(&ifp->lock); |
| 2284 | ipv6_ifa_notify(RTM_NEWADDR, ifp); |
| 2285 | in6_ifa_put(ifp); |
| 2286 | } |
| 2287 | } |
| 2288 | } |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2289 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2290 | } |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2291 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2292 | |
| 2293 | static void init_loopback(struct net_device *dev) |
| 2294 | { |
| 2295 | struct inet6_dev *idev; |
| 2296 | struct inet6_ifaddr * ifp; |
| 2297 | |
| 2298 | /* ::1 */ |
| 2299 | |
| 2300 | ASSERT_RTNL(); |
| 2301 | |
| 2302 | if ((idev = ipv6_find_idev(dev)) == NULL) { |
| 2303 | printk(KERN_DEBUG "init loopback: add_dev failed\n"); |
| 2304 | return; |
| 2305 | } |
| 2306 | |
| 2307 | ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT); |
| 2308 | if (!IS_ERR(ifp)) { |
| 2309 | spin_lock_bh(&ifp->lock); |
| 2310 | ifp->flags &= ~IFA_F_TENTATIVE; |
| 2311 | spin_unlock_bh(&ifp->lock); |
| 2312 | ipv6_ifa_notify(RTM_NEWADDR, ifp); |
| 2313 | in6_ifa_put(ifp); |
| 2314 | } |
| 2315 | } |
| 2316 | |
| 2317 | static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) |
| 2318 | { |
| 2319 | struct inet6_ifaddr * ifp; |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2320 | u32 addr_flags = IFA_F_PERMANENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2321 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2322 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 2323 | if (idev->cnf.optimistic_dad && |
David Miller | 702beb8 | 2008-07-20 18:17:02 -0700 | [diff] [blame] | 2324 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2325 | addr_flags |= IFA_F_OPTIMISTIC; |
| 2326 | #endif |
| 2327 | |
| 2328 | |
| 2329 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2330 | if (!IS_ERR(ifp)) { |
YOSHIFUJI Hideaki | 46d4804 | 2007-02-07 20:36:26 +0900 | [diff] [blame] | 2331 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2332 | addrconf_dad_start(ifp, 0); |
| 2333 | in6_ifa_put(ifp); |
| 2334 | } |
| 2335 | } |
| 2336 | |
| 2337 | static void addrconf_dev_config(struct net_device *dev) |
| 2338 | { |
| 2339 | struct in6_addr addr; |
| 2340 | struct inet6_dev * idev; |
| 2341 | |
| 2342 | ASSERT_RTNL(); |
| 2343 | |
Herbert Xu | 74235a2 | 2007-06-14 13:02:55 -0700 | [diff] [blame] | 2344 | if ((dev->type != ARPHRD_ETHER) && |
| 2345 | (dev->type != ARPHRD_FDDI) && |
| 2346 | (dev->type != ARPHRD_IEEE802_TR) && |
| 2347 | (dev->type != ARPHRD_ARCNET) && |
| 2348 | (dev->type != ARPHRD_INFINIBAND)) { |
| 2349 | /* Alas, we support only Ethernet autoconfiguration. */ |
| 2350 | return; |
| 2351 | } |
| 2352 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2353 | idev = addrconf_add_dev(dev); |
| 2354 | if (idev == NULL) |
| 2355 | return; |
| 2356 | |
| 2357 | memset(&addr, 0, sizeof(struct in6_addr)); |
| 2358 | addr.s6_addr32[0] = htonl(0xFE800000); |
| 2359 | |
| 2360 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) |
| 2361 | addrconf_add_linklocal(idev, &addr); |
| 2362 | } |
| 2363 | |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2364 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2365 | static void addrconf_sit_config(struct net_device *dev) |
| 2366 | { |
| 2367 | struct inet6_dev *idev; |
| 2368 | |
| 2369 | ASSERT_RTNL(); |
| 2370 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2371 | /* |
| 2372 | * Configure the tunnel with one of our IPv4 |
| 2373 | * addresses... we should configure all of |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2374 | * our v4 addrs in the tunnel |
| 2375 | */ |
| 2376 | |
| 2377 | if ((idev = ipv6_find_idev(dev)) == NULL) { |
| 2378 | printk(KERN_DEBUG "init sit: add_dev failed\n"); |
| 2379 | return; |
| 2380 | } |
| 2381 | |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 2382 | if (dev->priv_flags & IFF_ISATAP) { |
| 2383 | struct in6_addr addr; |
| 2384 | |
| 2385 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); |
| 2386 | addrconf_prefix_route(&addr, 64, dev, 0, 0); |
| 2387 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) |
| 2388 | addrconf_add_linklocal(idev, &addr); |
| 2389 | return; |
| 2390 | } |
| 2391 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2392 | sit_add_v4_addrs(idev); |
| 2393 | |
| 2394 | if (dev->flags&IFF_POINTOPOINT) { |
| 2395 | addrconf_add_mroute(dev); |
| 2396 | addrconf_add_lroute(dev); |
| 2397 | } else |
| 2398 | sit_route_add(dev); |
| 2399 | } |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2400 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2401 | |
| 2402 | static inline int |
| 2403 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) |
| 2404 | { |
| 2405 | struct in6_addr lladdr; |
| 2406 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2407 | if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2408 | addrconf_add_linklocal(idev, &lladdr); |
| 2409 | return 0; |
| 2410 | } |
| 2411 | return -1; |
| 2412 | } |
| 2413 | |
| 2414 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) |
| 2415 | { |
| 2416 | struct net_device *link_dev; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2417 | struct net *net = dev_net(idev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2418 | |
| 2419 | /* first try to inherit the link-local address from the link device */ |
| 2420 | if (idev->dev->iflink && |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 2421 | (link_dev = __dev_get_by_index(net, idev->dev->iflink))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2422 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
| 2423 | return; |
| 2424 | } |
| 2425 | /* then try to inherit it from any device */ |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 2426 | for_each_netdev(net, link_dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2427 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
| 2428 | return; |
| 2429 | } |
| 2430 | printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); |
| 2431 | } |
| 2432 | |
| 2433 | /* |
| 2434 | * Autoconfigure tunnel with a link-local address so routing protocols, |
| 2435 | * DHCPv6, MLD etc. can be run over the virtual link |
| 2436 | */ |
| 2437 | |
| 2438 | static void addrconf_ip6_tnl_config(struct net_device *dev) |
| 2439 | { |
| 2440 | struct inet6_dev *idev; |
| 2441 | |
| 2442 | ASSERT_RTNL(); |
| 2443 | |
| 2444 | if ((idev = addrconf_add_dev(dev)) == NULL) { |
| 2445 | printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); |
| 2446 | return; |
| 2447 | } |
| 2448 | ip6_tnl_add_linklocal(idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2449 | } |
| 2450 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2451 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2452 | void * data) |
| 2453 | { |
| 2454 | struct net_device *dev = (struct net_device *) data; |
Herbert Xu | 74235a2 | 2007-06-14 13:02:55 -0700 | [diff] [blame] | 2455 | struct inet6_dev *idev = __in6_dev_get(dev); |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 2456 | int run_pending = 0; |
Herbert Xu | b217d61 | 2007-07-30 17:04:52 -0700 | [diff] [blame] | 2457 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2458 | |
| 2459 | switch(event) { |
YOSHIFUJI Hideaki | 45ba9dd | 2007-02-15 02:07:27 +0900 | [diff] [blame] | 2460 | case NETDEV_REGISTER: |
Herbert Xu | 74235a2 | 2007-06-14 13:02:55 -0700 | [diff] [blame] | 2461 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
YOSHIFUJI Hideaki | 45ba9dd | 2007-02-15 02:07:27 +0900 | [diff] [blame] | 2462 | idev = ipv6_add_dev(dev); |
| 2463 | if (!idev) |
Herbert Xu | b217d61 | 2007-07-30 17:04:52 -0700 | [diff] [blame] | 2464 | return notifier_from_errno(-ENOMEM); |
YOSHIFUJI Hideaki | 45ba9dd | 2007-02-15 02:07:27 +0900 | [diff] [blame] | 2465 | } |
| 2466 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2467 | case NETDEV_UP: |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2468 | case NETDEV_CHANGE: |
Jay Vosburgh | c2edacf | 2007-07-09 10:42:47 -0700 | [diff] [blame] | 2469 | if (dev->flags & IFF_SLAVE) |
| 2470 | break; |
| 2471 | |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2472 | if (event == NETDEV_UP) { |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 2473 | if (!addrconf_qdisc_ok(dev)) { |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2474 | /* device is not ready yet. */ |
| 2475 | printk(KERN_INFO |
| 2476 | "ADDRCONF(NETDEV_UP): %s: " |
| 2477 | "link is not ready\n", |
| 2478 | dev->name); |
| 2479 | break; |
| 2480 | } |
Kristian Slavov | 9908104 | 2006-02-08 16:10:53 -0800 | [diff] [blame] | 2481 | |
Evgeniy Polyakov | d31c7b8 | 2007-11-30 23:36:08 +1100 | [diff] [blame] | 2482 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
| 2483 | idev = ipv6_add_dev(dev); |
| 2484 | |
Kristian Slavov | 9908104 | 2006-02-08 16:10:53 -0800 | [diff] [blame] | 2485 | if (idev) |
| 2486 | idev->if_flags |= IF_READY; |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2487 | } else { |
Mitsuru Chinen | f24e3d6 | 2007-10-10 02:53:43 -0700 | [diff] [blame] | 2488 | if (!addrconf_qdisc_ok(dev)) { |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2489 | /* device is still not ready. */ |
| 2490 | break; |
| 2491 | } |
| 2492 | |
| 2493 | if (idev) { |
| 2494 | if (idev->if_flags & IF_READY) { |
| 2495 | /* device is already configured. */ |
| 2496 | break; |
| 2497 | } |
| 2498 | idev->if_flags |= IF_READY; |
| 2499 | } |
| 2500 | |
| 2501 | printk(KERN_INFO |
| 2502 | "ADDRCONF(NETDEV_CHANGE): %s: " |
| 2503 | "link becomes ready\n", |
| 2504 | dev->name); |
| 2505 | |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 2506 | run_pending = 1; |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2507 | } |
| 2508 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2509 | switch(dev->type) { |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2510 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2511 | case ARPHRD_SIT: |
| 2512 | addrconf_sit_config(dev); |
| 2513 | break; |
Joerg Roedel | 0be669b | 2006-10-10 14:49:53 -0700 | [diff] [blame] | 2514 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2515 | case ARPHRD_TUNNEL6: |
| 2516 | addrconf_ip6_tnl_config(dev); |
| 2517 | break; |
| 2518 | case ARPHRD_LOOPBACK: |
| 2519 | init_loopback(dev); |
| 2520 | break; |
| 2521 | |
| 2522 | default: |
| 2523 | addrconf_dev_config(dev); |
| 2524 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 2525 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2526 | if (idev) { |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 2527 | if (run_pending) |
| 2528 | addrconf_dad_run(idev); |
| 2529 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2530 | /* If the MTU changed during the interface down, when the |
| 2531 | interface up, the changed MTU must be reflected in the |
| 2532 | idev as well as routers. |
| 2533 | */ |
| 2534 | if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) { |
| 2535 | rt6_mtu_change(dev, dev->mtu); |
| 2536 | idev->cnf.mtu6 = dev->mtu; |
| 2537 | } |
| 2538 | idev->tstamp = jiffies; |
| 2539 | inet6_ifinfo_notify(RTM_NEWLINK, idev); |
| 2540 | /* If the changed mtu during down is lower than IPV6_MIN_MTU |
| 2541 | stop IPv6 on this interface. |
| 2542 | */ |
| 2543 | if (dev->mtu < IPV6_MIN_MTU) |
| 2544 | addrconf_ifdown(dev, event != NETDEV_DOWN); |
| 2545 | } |
| 2546 | break; |
| 2547 | |
| 2548 | case NETDEV_CHANGEMTU: |
Evgeniy Polyakov | d31c7b8 | 2007-11-30 23:36:08 +1100 | [diff] [blame] | 2549 | if (idev && dev->mtu >= IPV6_MIN_MTU) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2550 | rt6_mtu_change(dev, dev->mtu); |
| 2551 | idev->cnf.mtu6 = dev->mtu; |
| 2552 | break; |
| 2553 | } |
| 2554 | |
Evgeniy Polyakov | d31c7b8 | 2007-11-30 23:36:08 +1100 | [diff] [blame] | 2555 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
| 2556 | idev = ipv6_add_dev(dev); |
| 2557 | if (idev) |
| 2558 | break; |
| 2559 | } |
| 2560 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2561 | /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */ |
| 2562 | |
| 2563 | case NETDEV_DOWN: |
| 2564 | case NETDEV_UNREGISTER: |
| 2565 | /* |
| 2566 | * Remove all addresses from this interface. |
| 2567 | */ |
| 2568 | addrconf_ifdown(dev, event != NETDEV_DOWN); |
| 2569 | break; |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2570 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2571 | case NETDEV_CHANGENAME: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2572 | if (idev) { |
Stephen Hemminger | 5632c51 | 2007-04-28 21:16:39 -0700 | [diff] [blame] | 2573 | snmp6_unregister_dev(idev); |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 2574 | addrconf_sysctl_unregister(idev); |
Pavel Emelyanov | f52295a | 2007-12-02 00:58:37 +1100 | [diff] [blame] | 2575 | addrconf_sysctl_register(idev); |
Herbert Xu | b217d61 | 2007-07-30 17:04:52 -0700 | [diff] [blame] | 2576 | err = snmp6_register_dev(idev); |
| 2577 | if (err) |
| 2578 | return notifier_from_errno(err); |
Stephen Hemminger | 5632c51 | 2007-04-28 21:16:39 -0700 | [diff] [blame] | 2579 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2580 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 2581 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2582 | |
| 2583 | return NOTIFY_OK; |
| 2584 | } |
| 2585 | |
| 2586 | /* |
| 2587 | * addrconf module should be notified of a device going up |
| 2588 | */ |
| 2589 | static struct notifier_block ipv6_dev_notf = { |
| 2590 | .notifier_call = addrconf_notify, |
| 2591 | .priority = 0 |
| 2592 | }; |
| 2593 | |
| 2594 | static int addrconf_ifdown(struct net_device *dev, int how) |
| 2595 | { |
| 2596 | struct inet6_dev *idev; |
| 2597 | struct inet6_ifaddr *ifa, **bifa; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2598 | struct net *net = dev_net(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2599 | int i; |
| 2600 | |
| 2601 | ASSERT_RTNL(); |
| 2602 | |
Denis V. Lunev | eb86757 | 2008-04-03 13:31:53 -0700 | [diff] [blame] | 2603 | if ((dev->flags & IFF_LOOPBACK) && how == 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2604 | how = 0; |
| 2605 | |
Daniel Lezcano | f3db485 | 2008-03-03 23:27:06 -0800 | [diff] [blame] | 2606 | rt6_ifdown(net, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2607 | neigh_ifdown(&nd_tbl, dev); |
| 2608 | |
| 2609 | idev = __in6_dev_get(dev); |
| 2610 | if (idev == NULL) |
| 2611 | return -ENODEV; |
| 2612 | |
| 2613 | /* Step 1: remove reference to ipv6 device from parent device. |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2614 | Do not dev_put! |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2615 | */ |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 2616 | if (how) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2617 | idev->dead = 1; |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 2618 | |
| 2619 | /* protected by rtnl_lock */ |
| 2620 | rcu_assign_pointer(dev->ip6_ptr, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2621 | |
| 2622 | /* Step 1.5: remove snmp6 entry */ |
| 2623 | snmp6_unregister_dev(idev); |
| 2624 | |
| 2625 | } |
| 2626 | |
| 2627 | /* Step 2: clear hash table */ |
| 2628 | for (i=0; i<IN6_ADDR_HSIZE; i++) { |
| 2629 | bifa = &inet6_addr_lst[i]; |
| 2630 | |
| 2631 | write_lock_bh(&addrconf_hash_lock); |
| 2632 | while ((ifa = *bifa) != NULL) { |
| 2633 | if (ifa->idev == idev) { |
| 2634 | *bifa = ifa->lst_next; |
| 2635 | ifa->lst_next = NULL; |
| 2636 | addrconf_del_timer(ifa); |
| 2637 | in6_ifa_put(ifa); |
| 2638 | continue; |
| 2639 | } |
| 2640 | bifa = &ifa->lst_next; |
| 2641 | } |
| 2642 | write_unlock_bh(&addrconf_hash_lock); |
| 2643 | } |
| 2644 | |
| 2645 | write_lock_bh(&idev->lock); |
| 2646 | |
| 2647 | /* Step 3: clear flags for stateless addrconf */ |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 2648 | if (!how) |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2649 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2650 | |
| 2651 | /* Step 4: clear address list */ |
| 2652 | #ifdef CONFIG_IPV6_PRIVACY |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 2653 | if (how && del_timer(&idev->regen_timer)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2654 | in6_dev_put(idev); |
| 2655 | |
| 2656 | /* clear tempaddr list */ |
| 2657 | while ((ifa = idev->tempaddr_list) != NULL) { |
| 2658 | idev->tempaddr_list = ifa->tmp_next; |
| 2659 | ifa->tmp_next = NULL; |
| 2660 | ifa->dead = 1; |
| 2661 | write_unlock_bh(&idev->lock); |
| 2662 | spin_lock_bh(&ifa->lock); |
| 2663 | |
| 2664 | if (ifa->ifpub) { |
| 2665 | in6_ifa_put(ifa->ifpub); |
| 2666 | ifa->ifpub = NULL; |
| 2667 | } |
| 2668 | spin_unlock_bh(&ifa->lock); |
| 2669 | in6_ifa_put(ifa); |
| 2670 | write_lock_bh(&idev->lock); |
| 2671 | } |
| 2672 | #endif |
| 2673 | while ((ifa = idev->addr_list) != NULL) { |
| 2674 | idev->addr_list = ifa->if_next; |
| 2675 | ifa->if_next = NULL; |
| 2676 | ifa->dead = 1; |
| 2677 | addrconf_del_timer(ifa); |
| 2678 | write_unlock_bh(&idev->lock); |
| 2679 | |
| 2680 | __ipv6_ifa_notify(RTM_DELADDR, ifa); |
Vlad Yasevich | 063ed36 | 2007-07-15 00:16:35 -0700 | [diff] [blame] | 2681 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2682 | in6_ifa_put(ifa); |
| 2683 | |
| 2684 | write_lock_bh(&idev->lock); |
| 2685 | } |
| 2686 | write_unlock_bh(&idev->lock); |
| 2687 | |
| 2688 | /* Step 5: Discard multicast list */ |
| 2689 | |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 2690 | if (how) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2691 | ipv6_mc_destroy_dev(idev); |
| 2692 | else |
| 2693 | ipv6_mc_down(idev); |
| 2694 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2695 | idev->tstamp = jiffies; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2696 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2697 | /* Shot the device (if unregistered) */ |
| 2698 | |
Denis V. Lunev | 439e238 | 2008-04-03 13:30:17 -0700 | [diff] [blame] | 2699 | if (how) { |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 2700 | addrconf_sysctl_unregister(idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2701 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
| 2702 | neigh_ifdown(&nd_tbl, dev); |
| 2703 | in6_dev_put(idev); |
| 2704 | } |
| 2705 | return 0; |
| 2706 | } |
| 2707 | |
| 2708 | static void addrconf_rs_timer(unsigned long data) |
| 2709 | { |
| 2710 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; |
| 2711 | |
| 2712 | if (ifp->idev->cnf.forwarding) |
| 2713 | goto out; |
| 2714 | |
| 2715 | if (ifp->idev->if_flags & IF_RA_RCVD) { |
| 2716 | /* |
| 2717 | * Announcement received after solicitation |
| 2718 | * was sent |
| 2719 | */ |
| 2720 | goto out; |
| 2721 | } |
| 2722 | |
| 2723 | spin_lock(&ifp->lock); |
| 2724 | if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2725 | /* The wait after the last probe can be shorter */ |
| 2726 | addrconf_mod_timer(ifp, AC_RS, |
| 2727 | (ifp->probes == ifp->idev->cnf.rtr_solicits) ? |
| 2728 | ifp->idev->cnf.rtr_solicit_delay : |
| 2729 | ifp->idev->cnf.rtr_solicit_interval); |
| 2730 | spin_unlock(&ifp->lock); |
| 2731 | |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 2732 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2733 | } else { |
| 2734 | spin_unlock(&ifp->lock); |
| 2735 | /* |
| 2736 | * Note: we do not support deprecated "all on-link" |
| 2737 | * assumption any longer. |
| 2738 | */ |
| 2739 | printk(KERN_DEBUG "%s: no IPv6 routers present\n", |
| 2740 | ifp->idev->dev->name); |
| 2741 | } |
| 2742 | |
| 2743 | out: |
| 2744 | in6_ifa_put(ifp); |
| 2745 | } |
| 2746 | |
| 2747 | /* |
| 2748 | * Duplicate Address Detection |
| 2749 | */ |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2750 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
| 2751 | { |
| 2752 | unsigned long rand_num; |
| 2753 | struct inet6_dev *idev = ifp->idev; |
| 2754 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2755 | if (ifp->flags & IFA_F_OPTIMISTIC) |
| 2756 | rand_num = 0; |
| 2757 | else |
| 2758 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); |
| 2759 | |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2760 | ifp->probes = idev->cnf.dad_transmits; |
| 2761 | addrconf_mod_timer(ifp, AC_DAD, rand_num); |
| 2762 | } |
| 2763 | |
Jamal Hadi Salim | e431b8c | 2005-06-18 22:55:31 -0700 | [diff] [blame] | 2764 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2765 | { |
| 2766 | struct inet6_dev *idev = ifp->idev; |
| 2767 | struct net_device *dev = idev->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2768 | |
| 2769 | addrconf_join_solict(dev, &ifp->addr); |
| 2770 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2771 | net_srandom(ifp->addr.s6_addr32[3]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2772 | |
| 2773 | read_lock_bh(&idev->lock); |
| 2774 | if (ifp->dead) |
| 2775 | goto out; |
| 2776 | spin_lock_bh(&ifp->lock); |
| 2777 | |
| 2778 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 2779 | idev->cnf.accept_dad < 1 || |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 2780 | !(ifp->flags&IFA_F_TENTATIVE) || |
| 2781 | ifp->flags & IFA_F_NODAD) { |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2782 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2783 | spin_unlock_bh(&ifp->lock); |
| 2784 | read_unlock_bh(&idev->lock); |
| 2785 | |
| 2786 | addrconf_dad_completed(ifp); |
| 2787 | return; |
| 2788 | } |
| 2789 | |
YOSHIFUJI Hideaki | 6732bad | 2005-12-27 13:35:15 -0800 | [diff] [blame] | 2790 | if (!(idev->if_flags & IF_READY)) { |
YOSHIFUJI Hideaki | 3dd3bf8 | 2005-12-23 11:23:21 -0800 | [diff] [blame] | 2791 | spin_unlock_bh(&ifp->lock); |
YOSHIFUJI Hideaki | 6732bad | 2005-12-27 13:35:15 -0800 | [diff] [blame] | 2792 | read_unlock_bh(&idev->lock); |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2793 | /* |
| 2794 | * If the defice is not ready: |
| 2795 | * - keep it tentative if it is a permanent address. |
| 2796 | * - otherwise, kill it. |
| 2797 | */ |
| 2798 | in6_ifa_hold(ifp); |
| 2799 | addrconf_dad_stop(ifp); |
YOSHIFUJI Hideaki | 6732bad | 2005-12-27 13:35:15 -0800 | [diff] [blame] | 2800 | return; |
YOSHIFUJI Hideaki | 3c21edb | 2005-12-21 22:57:24 +0900 | [diff] [blame] | 2801 | } |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2802 | |
| 2803 | /* |
| 2804 | * Optimistic nodes can start receiving |
| 2805 | * Frames right away |
| 2806 | */ |
| 2807 | if(ifp->flags & IFA_F_OPTIMISTIC) |
| 2808 | ip6_ins_rt(ifp->rt); |
| 2809 | |
YOSHIFUJI Hideaki | 6732bad | 2005-12-27 13:35:15 -0800 | [diff] [blame] | 2810 | addrconf_dad_kick(ifp); |
| 2811 | spin_unlock_bh(&ifp->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2812 | out: |
| 2813 | read_unlock_bh(&idev->lock); |
| 2814 | } |
| 2815 | |
| 2816 | static void addrconf_dad_timer(unsigned long data) |
| 2817 | { |
| 2818 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; |
| 2819 | struct inet6_dev *idev = ifp->idev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2820 | struct in6_addr mcaddr; |
| 2821 | |
| 2822 | read_lock_bh(&idev->lock); |
| 2823 | if (idev->dead) { |
| 2824 | read_unlock_bh(&idev->lock); |
| 2825 | goto out; |
| 2826 | } |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 2827 | if (idev->cnf.accept_dad > 1 && idev->cnf.disable_ipv6) { |
| 2828 | read_unlock_bh(&idev->lock); |
| 2829 | addrconf_dad_failure(ifp); |
| 2830 | return; |
| 2831 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2832 | spin_lock_bh(&ifp->lock); |
| 2833 | if (ifp->probes == 0) { |
| 2834 | /* |
| 2835 | * DAD was successful |
| 2836 | */ |
| 2837 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 2838 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2839 | spin_unlock_bh(&ifp->lock); |
| 2840 | read_unlock_bh(&idev->lock); |
| 2841 | |
| 2842 | addrconf_dad_completed(ifp); |
| 2843 | |
| 2844 | goto out; |
| 2845 | } |
| 2846 | |
| 2847 | ifp->probes--; |
| 2848 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); |
| 2849 | spin_unlock_bh(&ifp->lock); |
| 2850 | read_unlock_bh(&idev->lock); |
| 2851 | |
| 2852 | /* send a neighbour solicitation for our addr */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2853 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
YOSHIFUJI Hideaki | d7aabf2 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 2854 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2855 | out: |
| 2856 | in6_ifa_put(ifp); |
| 2857 | } |
| 2858 | |
| 2859 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) |
| 2860 | { |
| 2861 | struct net_device * dev = ifp->idev->dev; |
| 2862 | |
| 2863 | /* |
| 2864 | * Configure the address for reception. Now it is valid. |
| 2865 | */ |
| 2866 | |
| 2867 | ipv6_ifa_notify(RTM_NEWADDR, ifp); |
| 2868 | |
| 2869 | /* If added prefix is link local and forwarding is off, |
| 2870 | start sending router solicitations. |
| 2871 | */ |
| 2872 | |
| 2873 | if (ifp->idev->cnf.forwarding == 0 && |
| 2874 | ifp->idev->cnf.rtr_solicits > 0 && |
| 2875 | (dev->flags&IFF_LOOPBACK) == 0 && |
| 2876 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2877 | /* |
| 2878 | * If a host as already performed a random delay |
| 2879 | * [...] as part of DAD [...] there is no need |
| 2880 | * to delay again before sending the first RS |
| 2881 | */ |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 2882 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2883 | |
| 2884 | spin_lock_bh(&ifp->lock); |
| 2885 | ifp->probes = 1; |
| 2886 | ifp->idev->if_flags |= IF_RS_SENT; |
| 2887 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); |
| 2888 | spin_unlock_bh(&ifp->lock); |
| 2889 | } |
| 2890 | } |
| 2891 | |
YOSHIFUJI Hideaki | c5e33bd | 2005-12-21 22:57:44 +0900 | [diff] [blame] | 2892 | static void addrconf_dad_run(struct inet6_dev *idev) { |
| 2893 | struct inet6_ifaddr *ifp; |
| 2894 | |
| 2895 | read_lock_bh(&idev->lock); |
| 2896 | for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) { |
| 2897 | spin_lock_bh(&ifp->lock); |
| 2898 | if (!(ifp->flags & IFA_F_TENTATIVE)) { |
| 2899 | spin_unlock_bh(&ifp->lock); |
| 2900 | continue; |
| 2901 | } |
| 2902 | spin_unlock_bh(&ifp->lock); |
| 2903 | addrconf_dad_kick(ifp); |
| 2904 | } |
| 2905 | read_unlock_bh(&idev->lock); |
| 2906 | } |
| 2907 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2908 | #ifdef CONFIG_PROC_FS |
| 2909 | struct if6_iter_state { |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 2910 | struct seq_net_private p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2911 | int bucket; |
| 2912 | }; |
| 2913 | |
| 2914 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) |
| 2915 | { |
| 2916 | struct inet6_ifaddr *ifa = NULL; |
| 2917 | struct if6_iter_state *state = seq->private; |
YOSHIFUJI Hideaki | 1218854 | 2008-03-26 02:36:06 +0900 | [diff] [blame] | 2918 | struct net *net = seq_file_net(seq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2919 | |
| 2920 | for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { |
| 2921 | ifa = inet6_addr_lst[state->bucket]; |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 2922 | |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 2923 | while (ifa && !net_eq(dev_net(ifa->idev->dev), net)) |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 2924 | ifa = ifa->lst_next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2925 | if (ifa) |
| 2926 | break; |
| 2927 | } |
| 2928 | return ifa; |
| 2929 | } |
| 2930 | |
| 2931 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa) |
| 2932 | { |
| 2933 | struct if6_iter_state *state = seq->private; |
YOSHIFUJI Hideaki | 1218854 | 2008-03-26 02:36:06 +0900 | [diff] [blame] | 2934 | struct net *net = seq_file_net(seq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2935 | |
| 2936 | ifa = ifa->lst_next; |
| 2937 | try_again: |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 2938 | if (ifa) { |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 2939 | if (!net_eq(dev_net(ifa->idev->dev), net)) { |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 2940 | ifa = ifa->lst_next; |
| 2941 | goto try_again; |
| 2942 | } |
| 2943 | } |
| 2944 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2945 | if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) { |
| 2946 | ifa = inet6_addr_lst[state->bucket]; |
| 2947 | goto try_again; |
| 2948 | } |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 2949 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2950 | return ifa; |
| 2951 | } |
| 2952 | |
| 2953 | static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) |
| 2954 | { |
| 2955 | struct inet6_ifaddr *ifa = if6_get_first(seq); |
| 2956 | |
| 2957 | if (ifa) |
| 2958 | while(pos && (ifa = if6_get_next(seq, ifa)) != NULL) |
| 2959 | --pos; |
| 2960 | return pos ? NULL : ifa; |
| 2961 | } |
| 2962 | |
| 2963 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) |
Stephen Hemminger | d20b310 | 2008-01-21 00:48:43 -0800 | [diff] [blame] | 2964 | __acquires(addrconf_hash_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2965 | { |
| 2966 | read_lock_bh(&addrconf_hash_lock); |
| 2967 | return if6_get_idx(seq, *pos); |
| 2968 | } |
| 2969 | |
| 2970 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 2971 | { |
| 2972 | struct inet6_ifaddr *ifa; |
| 2973 | |
| 2974 | ifa = if6_get_next(seq, v); |
| 2975 | ++*pos; |
| 2976 | return ifa; |
| 2977 | } |
| 2978 | |
| 2979 | static void if6_seq_stop(struct seq_file *seq, void *v) |
Stephen Hemminger | d20b310 | 2008-01-21 00:48:43 -0800 | [diff] [blame] | 2980 | __releases(addrconf_hash_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2981 | { |
| 2982 | read_unlock_bh(&addrconf_hash_lock); |
| 2983 | } |
| 2984 | |
| 2985 | static int if6_seq_show(struct seq_file *seq, void *v) |
| 2986 | { |
| 2987 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; |
| 2988 | seq_printf(seq, |
YOSHIFUJI Hideaki | 9343e79 | 2006-01-17 02:10:53 -0800 | [diff] [blame] | 2989 | NIP6_SEQFMT " %02x %02x %02x %02x %8s\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2990 | NIP6(ifp->addr), |
| 2991 | ifp->idev->dev->ifindex, |
| 2992 | ifp->prefix_len, |
| 2993 | ifp->scope, |
| 2994 | ifp->flags, |
| 2995 | ifp->idev->dev->name); |
| 2996 | return 0; |
| 2997 | } |
| 2998 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 2999 | static const struct seq_operations if6_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3000 | .start = if6_seq_start, |
| 3001 | .next = if6_seq_next, |
| 3002 | .show = if6_seq_show, |
| 3003 | .stop = if6_seq_stop, |
| 3004 | }; |
| 3005 | |
| 3006 | static int if6_seq_open(struct inode *inode, struct file *file) |
| 3007 | { |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 3008 | return seq_open_net(inode, file, &if6_seq_ops, |
| 3009 | sizeof(struct if6_iter_state)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3010 | } |
| 3011 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 3012 | static const struct file_operations if6_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3013 | .owner = THIS_MODULE, |
| 3014 | .open = if6_seq_open, |
| 3015 | .read = seq_read, |
| 3016 | .llseek = seq_lseek, |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 3017 | .release = seq_release_net, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3018 | }; |
| 3019 | |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 3020 | static int if6_proc_net_init(struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3021 | { |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 3022 | if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3023 | return -ENOMEM; |
| 3024 | return 0; |
| 3025 | } |
| 3026 | |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 3027 | static void if6_proc_net_exit(struct net *net) |
| 3028 | { |
| 3029 | proc_net_remove(net, "if_inet6"); |
| 3030 | } |
| 3031 | |
| 3032 | static struct pernet_operations if6_proc_net_ops = { |
| 3033 | .init = if6_proc_net_init, |
| 3034 | .exit = if6_proc_net_exit, |
| 3035 | }; |
| 3036 | |
| 3037 | int __init if6_proc_init(void) |
| 3038 | { |
| 3039 | return register_pernet_subsys(&if6_proc_net_ops); |
| 3040 | } |
| 3041 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3042 | void if6_proc_exit(void) |
| 3043 | { |
Daniel Lezcano | 3c40090 | 2008-01-10 22:42:49 -0800 | [diff] [blame] | 3044 | unregister_pernet_subsys(&if6_proc_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3045 | } |
| 3046 | #endif /* CONFIG_PROC_FS */ |
| 3047 | |
Masahide NAKAMURA | 59fbb3a6 | 2007-06-26 23:56:32 -0700 | [diff] [blame] | 3048 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 3049 | /* Check if address is a home address configured on any interface. */ |
Daniel Lezcano | 389f661 | 2008-01-10 22:44:40 -0800 | [diff] [blame] | 3050 | int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr) |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 3051 | { |
| 3052 | int ret = 0; |
| 3053 | struct inet6_ifaddr * ifp; |
| 3054 | u8 hash = ipv6_addr_hash(addr); |
| 3055 | read_lock_bh(&addrconf_hash_lock); |
| 3056 | for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) { |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 3057 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
Daniel Lezcano | 389f661 | 2008-01-10 22:44:40 -0800 | [diff] [blame] | 3058 | continue; |
YOSHIFUJI Hideaki | caad295 | 2008-04-10 15:42:07 +0900 | [diff] [blame] | 3059 | if (ipv6_addr_equal(&ifp->addr, addr) && |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 3060 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
| 3061 | ret = 1; |
| 3062 | break; |
| 3063 | } |
| 3064 | } |
| 3065 | read_unlock_bh(&addrconf_hash_lock); |
| 3066 | return ret; |
| 3067 | } |
| 3068 | #endif |
| 3069 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3070 | /* |
| 3071 | * Periodic address status verification |
| 3072 | */ |
| 3073 | |
| 3074 | static void addrconf_verify(unsigned long foo) |
| 3075 | { |
| 3076 | struct inet6_ifaddr *ifp; |
| 3077 | unsigned long now, next; |
| 3078 | int i; |
| 3079 | |
| 3080 | spin_lock_bh(&addrconf_verify_lock); |
| 3081 | now = jiffies; |
| 3082 | next = now + ADDR_CHECK_FREQUENCY; |
| 3083 | |
| 3084 | del_timer(&addr_chk_timer); |
| 3085 | |
| 3086 | for (i=0; i < IN6_ADDR_HSIZE; i++) { |
| 3087 | |
| 3088 | restart: |
Yan Zheng | 5d5780d | 2005-11-20 13:42:20 -0800 | [diff] [blame] | 3089 | read_lock(&addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3090 | for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) { |
| 3091 | unsigned long age; |
| 3092 | #ifdef CONFIG_IPV6_PRIVACY |
| 3093 | unsigned long regen_advance; |
| 3094 | #endif |
| 3095 | |
| 3096 | if (ifp->flags & IFA_F_PERMANENT) |
| 3097 | continue; |
| 3098 | |
| 3099 | spin_lock(&ifp->lock); |
| 3100 | age = (now - ifp->tstamp) / HZ; |
| 3101 | |
| 3102 | #ifdef CONFIG_IPV6_PRIVACY |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3103 | regen_advance = ifp->idev->cnf.regen_max_retry * |
| 3104 | ifp->idev->cnf.dad_transmits * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3105 | ifp->idev->nd_parms->retrans_time / HZ; |
| 3106 | #endif |
| 3107 | |
YOSHIFUJI Hideaki | 8f27ebb | 2006-07-28 18:12:11 +0900 | [diff] [blame] | 3108 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
| 3109 | age >= ifp->valid_lft) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3110 | spin_unlock(&ifp->lock); |
| 3111 | in6_ifa_hold(ifp); |
Yan Zheng | 5d5780d | 2005-11-20 13:42:20 -0800 | [diff] [blame] | 3112 | read_unlock(&addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3113 | ipv6_del_addr(ifp); |
| 3114 | goto restart; |
YOSHIFUJI Hideaki | 8f27ebb | 2006-07-28 18:12:11 +0900 | [diff] [blame] | 3115 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
| 3116 | spin_unlock(&ifp->lock); |
| 3117 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3118 | } else if (age >= ifp->prefered_lft) { |
| 3119 | /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */ |
| 3120 | int deprecate = 0; |
| 3121 | |
| 3122 | if (!(ifp->flags&IFA_F_DEPRECATED)) { |
| 3123 | deprecate = 1; |
| 3124 | ifp->flags |= IFA_F_DEPRECATED; |
| 3125 | } |
| 3126 | |
| 3127 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) |
| 3128 | next = ifp->tstamp + ifp->valid_lft * HZ; |
| 3129 | |
| 3130 | spin_unlock(&ifp->lock); |
| 3131 | |
| 3132 | if (deprecate) { |
| 3133 | in6_ifa_hold(ifp); |
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 | ipv6_ifa_notify(0, ifp); |
| 3137 | in6_ifa_put(ifp); |
| 3138 | goto restart; |
| 3139 | } |
| 3140 | #ifdef CONFIG_IPV6_PRIVACY |
| 3141 | } else if ((ifp->flags&IFA_F_TEMPORARY) && |
| 3142 | !(ifp->flags&IFA_F_TENTATIVE)) { |
| 3143 | if (age >= ifp->prefered_lft - regen_advance) { |
| 3144 | struct inet6_ifaddr *ifpub = ifp->ifpub; |
| 3145 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) |
| 3146 | next = ifp->tstamp + ifp->prefered_lft * HZ; |
| 3147 | if (!ifp->regen_count && ifpub) { |
| 3148 | ifp->regen_count++; |
| 3149 | in6_ifa_hold(ifp); |
| 3150 | in6_ifa_hold(ifpub); |
| 3151 | spin_unlock(&ifp->lock); |
Yan Zheng | 5d5780d | 2005-11-20 13:42:20 -0800 | [diff] [blame] | 3152 | read_unlock(&addrconf_hash_lock); |
Hiroyuki YAMAMORI | 291d809 | 2005-12-23 11:24:05 -0800 | [diff] [blame] | 3153 | spin_lock(&ifpub->lock); |
| 3154 | ifpub->regen_count = 0; |
| 3155 | spin_unlock(&ifpub->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3156 | ipv6_create_tempaddr(ifpub, ifp); |
| 3157 | in6_ifa_put(ifpub); |
| 3158 | in6_ifa_put(ifp); |
| 3159 | goto restart; |
| 3160 | } |
| 3161 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) |
| 3162 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; |
| 3163 | spin_unlock(&ifp->lock); |
| 3164 | #endif |
| 3165 | } else { |
| 3166 | /* ifp->prefered_lft <= ifp->valid_lft */ |
| 3167 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) |
| 3168 | next = ifp->tstamp + ifp->prefered_lft * HZ; |
| 3169 | spin_unlock(&ifp->lock); |
| 3170 | } |
| 3171 | } |
Yan Zheng | 5d5780d | 2005-11-20 13:42:20 -0800 | [diff] [blame] | 3172 | read_unlock(&addrconf_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3173 | } |
| 3174 | |
| 3175 | addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next; |
| 3176 | add_timer(&addr_chk_timer); |
| 3177 | spin_unlock_bh(&addrconf_verify_lock); |
| 3178 | } |
| 3179 | |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3180 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) |
| 3181 | { |
| 3182 | struct in6_addr *pfx = NULL; |
| 3183 | |
| 3184 | if (addr) |
| 3185 | pfx = nla_data(addr); |
| 3186 | |
| 3187 | if (local) { |
| 3188 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) |
| 3189 | pfx = NULL; |
| 3190 | else |
| 3191 | pfx = nla_data(local); |
| 3192 | } |
| 3193 | |
| 3194 | return pfx; |
| 3195 | } |
| 3196 | |
Patrick McHardy | ef7c79e | 2007-06-05 12:38:30 -0700 | [diff] [blame] | 3197 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3198 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
| 3199 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, |
| 3200 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, |
| 3201 | }; |
| 3202 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3203 | static int |
| 3204 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
| 3205 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 3206 | struct net *net = sock_net(skb->sk); |
Thomas Graf | b933f71 | 2006-09-18 00:10:19 -0700 | [diff] [blame] | 3207 | struct ifaddrmsg *ifm; |
| 3208 | struct nlattr *tb[IFA_MAX+1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3209 | struct in6_addr *pfx; |
Thomas Graf | b933f71 | 2006-09-18 00:10:19 -0700 | [diff] [blame] | 3210 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3211 | |
Thomas Graf | b933f71 | 2006-09-18 00:10:19 -0700 | [diff] [blame] | 3212 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
| 3213 | if (err < 0) |
| 3214 | return err; |
| 3215 | |
| 3216 | ifm = nlmsg_data(nlh); |
| 3217 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3218 | if (pfx == NULL) |
| 3219 | return -EINVAL; |
| 3220 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 3221 | return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3222 | } |
| 3223 | |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 3224 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
| 3225 | u32 prefered_lft, u32 valid_lft) |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3226 | { |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 3227 | u32 flags; |
| 3228 | clock_t expires; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 3229 | unsigned long timeout; |
YOSHIFUJI Hideaki | 46d4804 | 2007-02-07 20:36:26 +0900 | [diff] [blame] | 3230 | |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3231 | if (!valid_lft || (prefered_lft > valid_lft)) |
| 3232 | return -EINVAL; |
| 3233 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 3234 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
| 3235 | if (addrconf_finite_timeout(timeout)) { |
| 3236 | expires = jiffies_to_clock_t(timeout * HZ); |
| 3237 | valid_lft = timeout; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 3238 | flags = RTF_EXPIRES; |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 3239 | } else { |
| 3240 | expires = 0; |
| 3241 | flags = 0; |
| 3242 | ifa_flags |= IFA_F_PERMANENT; |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 3243 | } |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3244 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 3245 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
| 3246 | if (addrconf_finite_timeout(timeout)) { |
| 3247 | if (timeout == 0) |
| 3248 | ifa_flags |= IFA_F_DEPRECATED; |
| 3249 | prefered_lft = timeout; |
| 3250 | } |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3251 | |
| 3252 | spin_lock_bh(&ifp->lock); |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 3253 | 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] | 3254 | ifp->tstamp = jiffies; |
| 3255 | ifp->valid_lft = valid_lft; |
| 3256 | ifp->prefered_lft = prefered_lft; |
| 3257 | |
| 3258 | spin_unlock_bh(&ifp->lock); |
| 3259 | if (!(ifp->flags&IFA_F_TENTATIVE)) |
| 3260 | ipv6_ifa_notify(0, ifp); |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3261 | |
YOSHIFUJI Hideaki | 46d4804 | 2007-02-07 20:36:26 +0900 | [diff] [blame] | 3262 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
YOSHIFUJI Hideaki | 6f70499 | 2008-05-19 16:56:11 -0700 | [diff] [blame] | 3263 | expires, flags); |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3264 | addrconf_verify(0); |
| 3265 | |
| 3266 | return 0; |
| 3267 | } |
| 3268 | |
| 3269 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3270 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
| 3271 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 3272 | struct net *net = sock_net(skb->sk); |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3273 | struct ifaddrmsg *ifm; |
| 3274 | struct nlattr *tb[IFA_MAX+1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3275 | struct in6_addr *pfx; |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 3276 | struct inet6_ifaddr *ifa; |
| 3277 | struct net_device *dev; |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 3278 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
| 3279 | u8 ifa_flags; |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3280 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3281 | |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3282 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
| 3283 | if (err < 0) |
| 3284 | return err; |
| 3285 | |
| 3286 | ifm = nlmsg_data(nlh); |
| 3287 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3288 | if (pfx == NULL) |
| 3289 | return -EINVAL; |
| 3290 | |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3291 | if (tb[IFA_CACHEINFO]) { |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 3292 | struct ifa_cacheinfo *ci; |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3293 | |
| 3294 | ci = nla_data(tb[IFA_CACHEINFO]); |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 3295 | valid_lft = ci->ifa_valid; |
Thomas Graf | 461d883 | 2006-09-18 00:09:49 -0700 | [diff] [blame] | 3296 | preferred_lft = ci->ifa_prefered; |
| 3297 | } else { |
| 3298 | preferred_lft = INFINITY_LIFE_TIME; |
| 3299 | valid_lft = INFINITY_LIFE_TIME; |
Noriaki TAKAMIYA | 0778769 | 2006-07-28 18:12:10 +0900 | [diff] [blame] | 3300 | } |
| 3301 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 3302 | dev = __dev_get_by_index(net, ifm->ifa_index); |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 3303 | if (dev == NULL) |
| 3304 | return -ENODEV; |
| 3305 | |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 3306 | /* We ignore other flags so far. */ |
Noriaki TAKAMIYA | 3b9f9a1 | 2006-09-22 14:45:56 -0700 | [diff] [blame] | 3307 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 3308 | |
Daniel Lezcano | 1cab3da | 2008-01-10 22:44:09 -0800 | [diff] [blame] | 3309 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 3310 | if (ifa == NULL) { |
| 3311 | /* |
| 3312 | * It would be best to check for !NLM_F_CREATE here but |
| 3313 | * userspace alreay relies on not having to provide this. |
| 3314 | */ |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 3315 | return inet6_addr_add(net, ifm->ifa_index, pfx, |
| 3316 | ifm->ifa_prefixlen, ifa_flags, |
| 3317 | preferred_lft, valid_lft); |
Noriaki TAKAMIYA | 081bba5 | 2006-07-28 18:12:13 +0900 | [diff] [blame] | 3318 | } |
| 3319 | |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 3320 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
| 3321 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) |
| 3322 | err = -EEXIST; |
| 3323 | else |
Noriaki TAKAMIYA | 55ebaef | 2006-09-22 14:45:27 -0700 | [diff] [blame] | 3324 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
Thomas Graf | 7198f8c | 2006-09-18 00:13:46 -0700 | [diff] [blame] | 3325 | |
| 3326 | in6_ifa_put(ifa); |
| 3327 | |
| 3328 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3329 | } |
| 3330 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3331 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
| 3332 | u8 scope, int ifindex) |
| 3333 | { |
| 3334 | struct ifaddrmsg *ifm; |
| 3335 | |
| 3336 | ifm = nlmsg_data(nlh); |
| 3337 | ifm->ifa_family = AF_INET6; |
| 3338 | ifm->ifa_prefixlen = prefixlen; |
| 3339 | ifm->ifa_flags = flags; |
| 3340 | ifm->ifa_scope = scope; |
| 3341 | ifm->ifa_index = ifindex; |
| 3342 | } |
| 3343 | |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3344 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
| 3345 | unsigned long tstamp, u32 preferred, u32 valid) |
| 3346 | { |
| 3347 | struct ifa_cacheinfo ci; |
| 3348 | |
| 3349 | ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100 |
| 3350 | + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); |
| 3351 | ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100 |
| 3352 | + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); |
| 3353 | ci.ifa_prefered = preferred; |
| 3354 | ci.ifa_valid = valid; |
| 3355 | |
| 3356 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); |
| 3357 | } |
| 3358 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3359 | static inline int rt_scope(int ifa_scope) |
| 3360 | { |
| 3361 | if (ifa_scope & IFA_HOST) |
| 3362 | return RT_SCOPE_HOST; |
| 3363 | else if (ifa_scope & IFA_LINK) |
| 3364 | return RT_SCOPE_LINK; |
| 3365 | else if (ifa_scope & IFA_SITE) |
| 3366 | return RT_SCOPE_SITE; |
| 3367 | else |
| 3368 | return RT_SCOPE_UNIVERSE; |
| 3369 | } |
| 3370 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3371 | static inline int inet6_ifaddr_msgsize(void) |
| 3372 | { |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 3373 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
| 3374 | + nla_total_size(16) /* IFA_ADDRESS */ |
| 3375 | + nla_total_size(sizeof(struct ifa_cacheinfo)); |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3376 | } |
YOSHIFUJI Hideaki | c5396a3 | 2006-06-17 22:48:48 -0700 | [diff] [blame] | 3377 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3378 | 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] | 3379 | u32 pid, u32 seq, int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3380 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3381 | struct nlmsghdr *nlh; |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3382 | u32 preferred, valid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3383 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3384 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
| 3385 | if (nlh == NULL) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3386 | return -EMSGSIZE; |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3387 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3388 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
| 3389 | ifa->idev->dev->ifindex); |
| 3390 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3391 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3392 | preferred = ifa->prefered_lft; |
| 3393 | valid = ifa->valid_lft; |
| 3394 | if (preferred != INFINITY_LIFE_TIME) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3395 | long tval = (jiffies - ifa->tstamp)/HZ; |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3396 | preferred -= tval; |
| 3397 | if (valid != INFINITY_LIFE_TIME) |
| 3398 | valid -= tval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3399 | } |
| 3400 | } else { |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3401 | preferred = INFINITY_LIFE_TIME; |
| 3402 | valid = INFINITY_LIFE_TIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3403 | } |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3404 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3405 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3406 | put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { |
| 3407 | nlmsg_cancel(skb, nlh); |
| 3408 | return -EMSGSIZE; |
| 3409 | } |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3410 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3411 | return nlmsg_end(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3412 | } |
| 3413 | |
| 3414 | 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] | 3415 | u32 pid, u32 seq, int event, u16 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3416 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3417 | struct nlmsghdr *nlh; |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3418 | u8 scope = RT_SCOPE_UNIVERSE; |
| 3419 | int ifindex = ifmca->idev->dev->ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3420 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3421 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) |
| 3422 | scope = RT_SCOPE_SITE; |
| 3423 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3424 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
| 3425 | if (nlh == NULL) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3426 | return -EMSGSIZE; |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3427 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3428 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3429 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || |
| 3430 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3431 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
| 3432 | nlmsg_cancel(skb, nlh); |
| 3433 | return -EMSGSIZE; |
| 3434 | } |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3435 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3436 | return nlmsg_end(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3437 | } |
| 3438 | |
| 3439 | 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] | 3440 | u32 pid, u32 seq, int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3441 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3442 | struct nlmsghdr *nlh; |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3443 | u8 scope = RT_SCOPE_UNIVERSE; |
| 3444 | int ifindex = ifaca->aca_idev->dev->ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3445 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3446 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) |
| 3447 | scope = RT_SCOPE_SITE; |
| 3448 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3449 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
| 3450 | if (nlh == NULL) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3451 | return -EMSGSIZE; |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3452 | |
Thomas Graf | 101bb22 | 2006-09-18 00:11:52 -0700 | [diff] [blame] | 3453 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3454 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || |
| 3455 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3456 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
| 3457 | nlmsg_cancel(skb, nlh); |
| 3458 | return -EMSGSIZE; |
| 3459 | } |
Thomas Graf | 85486af | 2006-09-18 00:11:24 -0700 | [diff] [blame] | 3460 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3461 | return nlmsg_end(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3462 | } |
| 3463 | |
| 3464 | enum addr_type_t |
| 3465 | { |
| 3466 | UNICAST_ADDR, |
| 3467 | MULTICAST_ADDR, |
| 3468 | ANYCAST_ADDR, |
| 3469 | }; |
| 3470 | |
| 3471 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, |
| 3472 | enum addr_type_t type) |
| 3473 | { |
| 3474 | int idx, ip_idx; |
| 3475 | int s_idx, s_ip_idx; |
| 3476 | int err = 1; |
| 3477 | struct net_device *dev; |
| 3478 | struct inet6_dev *idev = NULL; |
| 3479 | struct inet6_ifaddr *ifa; |
| 3480 | struct ifmcaddr6 *ifmca; |
| 3481 | struct ifacaddr6 *ifaca; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 3482 | struct net *net = sock_net(skb->sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3483 | |
| 3484 | s_idx = cb->args[0]; |
| 3485 | s_ip_idx = ip_idx = cb->args[1]; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3486 | |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 3487 | idx = 0; |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 3488 | for_each_netdev(net, dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3489 | if (idx < s_idx) |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 3490 | goto cont; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3491 | if (idx > s_idx) |
| 3492 | s_ip_idx = 0; |
| 3493 | ip_idx = 0; |
| 3494 | if ((idev = in6_dev_get(dev)) == NULL) |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 3495 | goto cont; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3496 | read_lock_bh(&idev->lock); |
| 3497 | switch (type) { |
| 3498 | case UNICAST_ADDR: |
YOSHIFUJI Hideaki | ae9cda5 | 2005-06-28 13:00:30 -0700 | [diff] [blame] | 3499 | /* unicast address incl. temp addr */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3500 | for (ifa = idev->addr_list; ifa; |
| 3501 | ifa = ifa->if_next, ip_idx++) { |
| 3502 | if (ip_idx < s_ip_idx) |
| 3503 | continue; |
YOSHIFUJI Hideaki | 5d5619b | 2008-01-22 17:29:40 +0900 | [diff] [blame] | 3504 | err = inet6_fill_ifaddr(skb, ifa, |
| 3505 | NETLINK_CB(cb->skb).pid, |
| 3506 | cb->nlh->nlmsg_seq, |
| 3507 | RTM_NEWADDR, |
| 3508 | NLM_F_MULTI); |
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 | break; |
| 3511 | case MULTICAST_ADDR: |
| 3512 | /* multicast address */ |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3513 | for (ifmca = idev->mc_list; ifmca; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3514 | ifmca = ifmca->next, ip_idx++) { |
| 3515 | if (ip_idx < s_ip_idx) |
| 3516 | continue; |
YOSHIFUJI Hideaki | 5d5619b | 2008-01-22 17:29:40 +0900 | [diff] [blame] | 3517 | err = inet6_fill_ifmcaddr(skb, ifmca, |
| 3518 | NETLINK_CB(cb->skb).pid, |
| 3519 | cb->nlh->nlmsg_seq, |
| 3520 | RTM_GETMULTICAST, |
| 3521 | NLM_F_MULTI); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3522 | } |
| 3523 | break; |
| 3524 | case ANYCAST_ADDR: |
| 3525 | /* anycast address */ |
| 3526 | for (ifaca = idev->ac_list; ifaca; |
| 3527 | ifaca = ifaca->aca_next, ip_idx++) { |
| 3528 | if (ip_idx < s_ip_idx) |
| 3529 | continue; |
YOSHIFUJI Hideaki | 5d5619b | 2008-01-22 17:29:40 +0900 | [diff] [blame] | 3530 | err = inet6_fill_ifacaddr(skb, ifaca, |
| 3531 | NETLINK_CB(cb->skb).pid, |
| 3532 | cb->nlh->nlmsg_seq, |
| 3533 | RTM_GETANYCAST, |
| 3534 | NLM_F_MULTI); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3535 | } |
| 3536 | break; |
| 3537 | default: |
| 3538 | break; |
| 3539 | } |
| 3540 | read_unlock_bh(&idev->lock); |
| 3541 | in6_dev_put(idev); |
YOSHIFUJI Hideaki | 5d5619b | 2008-01-22 17:29:40 +0900 | [diff] [blame] | 3542 | |
| 3543 | if (err <= 0) |
| 3544 | break; |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 3545 | cont: |
| 3546 | idx++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3547 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3548 | cb->args[0] = idx; |
| 3549 | cb->args[1] = ip_idx; |
| 3550 | return skb->len; |
| 3551 | } |
| 3552 | |
| 3553 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) |
| 3554 | { |
| 3555 | enum addr_type_t type = UNICAST_ADDR; |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 3556 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3557 | return inet6_dump_addr(skb, cb, type); |
| 3558 | } |
| 3559 | |
| 3560 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) |
| 3561 | { |
| 3562 | enum addr_type_t type = MULTICAST_ADDR; |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 3563 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3564 | return inet6_dump_addr(skb, cb, type); |
| 3565 | } |
| 3566 | |
| 3567 | |
| 3568 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) |
| 3569 | { |
| 3570 | enum addr_type_t type = ANYCAST_ADDR; |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 3571 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3572 | return inet6_dump_addr(skb, cb, type); |
| 3573 | } |
| 3574 | |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 3575 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh, |
| 3576 | void *arg) |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3577 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 3578 | struct net *net = sock_net(in_skb->sk); |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 3579 | struct ifaddrmsg *ifm; |
| 3580 | struct nlattr *tb[IFA_MAX+1]; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3581 | struct in6_addr *addr = NULL; |
| 3582 | struct net_device *dev = NULL; |
| 3583 | struct inet6_ifaddr *ifa; |
| 3584 | struct sk_buff *skb; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3585 | int err; |
| 3586 | |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 3587 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
| 3588 | if (err < 0) |
| 3589 | goto errout; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3590 | |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 3591 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); |
| 3592 | if (addr == NULL) { |
| 3593 | err = -EINVAL; |
| 3594 | goto errout; |
| 3595 | } |
| 3596 | |
| 3597 | ifm = nlmsg_data(nlh); |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3598 | if (ifm->ifa_index) |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 3599 | dev = __dev_get_by_index(net, ifm->ifa_index); |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3600 | |
Daniel Lezcano | 1cab3da | 2008-01-10 22:44:09 -0800 | [diff] [blame] | 3601 | if ((ifa = ipv6_get_ifaddr(net, addr, dev, 1)) == NULL) { |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 3602 | err = -EADDRNOTAVAIL; |
| 3603 | goto errout; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3604 | } |
| 3605 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3606 | if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) { |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 3607 | err = -ENOBUFS; |
| 3608 | goto errout_ifa; |
| 3609 | } |
| 3610 | |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3611 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, |
| 3612 | nlh->nlmsg_seq, RTM_NEWADDR, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3613 | if (err < 0) { |
| 3614 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ |
| 3615 | WARN_ON(err == -EMSGSIZE); |
| 3616 | kfree_skb(skb); |
| 3617 | goto errout_ifa; |
| 3618 | } |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 3619 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid); |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 3620 | errout_ifa: |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3621 | in6_ifa_put(ifa); |
Thomas Graf | 1b29fc2 | 2006-09-18 00:10:50 -0700 | [diff] [blame] | 3622 | errout: |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3623 | return err; |
Noriaki TAKAMIYA | 6c22382 | 2006-07-28 18:12:12 +0900 | [diff] [blame] | 3624 | } |
| 3625 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3626 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
| 3627 | { |
| 3628 | struct sk_buff *skb; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 3629 | struct net *net = dev_net(ifa->idev->dev); |
Thomas Graf | 5d62026 | 2006-08-15 00:35:02 -0700 | [diff] [blame] | 3630 | int err = -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3631 | |
Thomas Graf | 0ab6803 | 2006-09-18 00:12:35 -0700 | [diff] [blame] | 3632 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
Thomas Graf | 5d62026 | 2006-08-15 00:35:02 -0700 | [diff] [blame] | 3633 | if (skb == NULL) |
| 3634 | goto errout; |
| 3635 | |
| 3636 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3637 | if (err < 0) { |
| 3638 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ |
| 3639 | WARN_ON(err == -EMSGSIZE); |
| 3640 | kfree_skb(skb); |
| 3641 | goto errout; |
| 3642 | } |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 3643 | err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
Thomas Graf | 5d62026 | 2006-08-15 00:35:02 -0700 | [diff] [blame] | 3644 | errout: |
| 3645 | if (err < 0) |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 3646 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3647 | } |
| 3648 | |
Dave Jones | b6f99a2 | 2007-03-22 12:27:49 -0700 | [diff] [blame] | 3649 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3650 | __s32 *array, int bytes) |
| 3651 | { |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3652 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
| 3653 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3654 | memset(array, 0, bytes); |
| 3655 | array[DEVCONF_FORWARDING] = cnf->forwarding; |
| 3656 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; |
| 3657 | array[DEVCONF_MTU6] = cnf->mtu6; |
| 3658 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; |
| 3659 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; |
| 3660 | array[DEVCONF_AUTOCONF] = cnf->autoconf; |
| 3661 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; |
| 3662 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; |
| 3663 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; |
| 3664 | array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; |
| 3665 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; |
| 3666 | #ifdef CONFIG_IPV6_PRIVACY |
| 3667 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; |
| 3668 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; |
| 3669 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; |
| 3670 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; |
| 3671 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; |
| 3672 | #endif |
| 3673 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 3674 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 3675 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 3676 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 3677 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; |
YOSHIFUJI Hideaki | 52e1635 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 3678 | array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval; |
Neil Horman | fa03ef3 | 2007-01-30 14:30:10 -0800 | [diff] [blame] | 3679 | #ifdef CONFIG_IPV6_ROUTE_INFO |
YOSHIFUJI Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 3680 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
| 3681 | #endif |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 3682 | #endif |
YOSHIFUJI Hideaki | fbea49e | 2006-09-22 14:43:49 -0700 | [diff] [blame] | 3683 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 3684 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 3685 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 3686 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; |
| 3687 | #endif |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 3688 | #ifdef CONFIG_IPV6_MROUTE |
| 3689 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; |
| 3690 | #endif |
YOSHIFUJI Hideaki | 778d80b | 2008-06-28 14:17:11 +0900 | [diff] [blame] | 3691 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 3692 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3693 | } |
| 3694 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 3695 | static inline size_t inet6_if_nlmsg_size(void) |
| 3696 | { |
| 3697 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) |
| 3698 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ |
| 3699 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ |
| 3700 | + nla_total_size(4) /* IFLA_MTU */ |
| 3701 | + nla_total_size(4) /* IFLA_LINK */ |
| 3702 | + nla_total_size( /* IFLA_PROTINFO */ |
| 3703 | nla_total_size(4) /* IFLA_INET6_FLAGS */ |
| 3704 | + nla_total_size(sizeof(struct ifla_cacheinfo)) |
| 3705 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 3706 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ |
| 3707 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 3708 | ); |
| 3709 | } |
YOSHIFUJI Hideaki | c5396a3 | 2006-06-17 22:48:48 -0700 | [diff] [blame] | 3710 | |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 3711 | static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items, |
| 3712 | int bytes) |
| 3713 | { |
| 3714 | int i; |
| 3715 | int pad = bytes - sizeof(u64) * items; |
| 3716 | BUG_ON(pad < 0); |
| 3717 | |
| 3718 | /* Use put_unaligned() because stats may not be aligned for u64. */ |
| 3719 | put_unaligned(items, &stats[0]); |
| 3720 | for (i = 1; i < items; i++) |
| 3721 | put_unaligned(snmp_fold_field(mib, i), &stats[i]); |
| 3722 | |
| 3723 | memset(&stats[items], 0, pad); |
| 3724 | } |
| 3725 | |
| 3726 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, |
| 3727 | int bytes) |
| 3728 | { |
| 3729 | switch(attrtype) { |
| 3730 | case IFLA_INET6_STATS: |
| 3731 | __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes); |
| 3732 | break; |
| 3733 | case IFLA_INET6_ICMP6STATS: |
| 3734 | __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes); |
| 3735 | break; |
| 3736 | } |
| 3737 | } |
| 3738 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3739 | 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] | 3740 | u32 pid, u32 seq, int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3741 | { |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3742 | struct net_device *dev = idev->dev; |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 3743 | struct nlattr *nla; |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3744 | struct ifinfomsg *hdr; |
| 3745 | struct nlmsghdr *nlh; |
| 3746 | void *protoinfo; |
| 3747 | struct ifla_cacheinfo ci; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3748 | |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3749 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); |
| 3750 | if (nlh == NULL) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3751 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3752 | |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3753 | hdr = nlmsg_data(nlh); |
| 3754 | hdr->ifi_family = AF_INET6; |
| 3755 | hdr->__ifi_pad = 0; |
| 3756 | hdr->ifi_type = dev->type; |
| 3757 | hdr->ifi_index = dev->ifindex; |
| 3758 | hdr->ifi_flags = dev_get_flags(dev); |
| 3759 | hdr->ifi_change = 0; |
| 3760 | |
| 3761 | NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3762 | |
| 3763 | if (dev->addr_len) |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3764 | NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3765 | |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3766 | NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3767 | if (dev->ifindex != dev->iflink) |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3768 | NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3769 | |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3770 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
| 3771 | if (protoinfo == NULL) |
| 3772 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3773 | |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3774 | NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3775 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3776 | ci.max_reasm_len = IPV6_MAXPLEN; |
| 3777 | ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 |
| 3778 | + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); |
| 3779 | ci.reachable_time = idev->nd_parms->reachable_time; |
| 3780 | ci.retrans_time = idev->nd_parms->retrans_time; |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3781 | NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); |
| 3782 | |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 3783 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
| 3784 | if (nla == NULL) |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3785 | goto nla_put_failure; |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 3786 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3787 | |
YOSHIFUJI Hideaki | bf99f1b | 2007-04-20 15:56:20 -0700 | [diff] [blame] | 3788 | /* XXX - MC not implemented */ |
| 3789 | |
| 3790 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); |
| 3791 | if (nla == NULL) |
| 3792 | goto nla_put_failure; |
| 3793 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); |
| 3794 | |
| 3795 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); |
| 3796 | if (nla == NULL) |
| 3797 | goto nla_put_failure; |
| 3798 | 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] | 3799 | |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3800 | nla_nest_end(skb, protoinfo); |
| 3801 | return nlmsg_end(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3802 | |
Thomas Graf | 04561c1 | 2006-11-14 19:53:58 -0800 | [diff] [blame] | 3803 | nla_put_failure: |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3804 | nlmsg_cancel(skb, nlh); |
| 3805 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3806 | } |
| 3807 | |
| 3808 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) |
| 3809 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 3810 | struct net *net = sock_net(skb->sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3811 | int idx, err; |
| 3812 | int s_idx = cb->args[0]; |
| 3813 | struct net_device *dev; |
| 3814 | struct inet6_dev *idev; |
| 3815 | |
| 3816 | read_lock(&dev_base_lock); |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 3817 | idx = 0; |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 3818 | for_each_netdev(net, dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3819 | if (idx < s_idx) |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 3820 | goto cont; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3821 | if ((idev = in6_dev_get(dev)) == NULL) |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 3822 | goto cont; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3823 | err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid, |
Jamal Hadi Salim | b6544c0 | 2005-06-18 22:54:12 -0700 | [diff] [blame] | 3824 | cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3825 | in6_dev_put(idev); |
| 3826 | if (err <= 0) |
| 3827 | break; |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 3828 | cont: |
| 3829 | idx++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3830 | } |
| 3831 | read_unlock(&dev_base_lock); |
| 3832 | cb->args[0] = idx; |
| 3833 | |
| 3834 | return skb->len; |
| 3835 | } |
| 3836 | |
| 3837 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) |
| 3838 | { |
| 3839 | struct sk_buff *skb; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 3840 | struct net *net = dev_net(idev->dev); |
Thomas Graf | 8d7a76c | 2006-08-15 00:35:47 -0700 | [diff] [blame] | 3841 | int err = -ENOBUFS; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3842 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 3843 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
Thomas Graf | 8d7a76c | 2006-08-15 00:35:47 -0700 | [diff] [blame] | 3844 | if (skb == NULL) |
| 3845 | goto errout; |
| 3846 | |
| 3847 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3848 | if (err < 0) { |
| 3849 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ |
| 3850 | WARN_ON(err == -EMSGSIZE); |
| 3851 | kfree_skb(skb); |
| 3852 | goto errout; |
| 3853 | } |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 3854 | err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
Thomas Graf | 8d7a76c | 2006-08-15 00:35:47 -0700 | [diff] [blame] | 3855 | errout: |
| 3856 | if (err < 0) |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 3857 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3858 | } |
| 3859 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 3860 | static inline size_t inet6_prefix_nlmsg_size(void) |
| 3861 | { |
| 3862 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) |
| 3863 | + nla_total_size(sizeof(struct in6_addr)) |
| 3864 | + nla_total_size(sizeof(struct prefix_cacheinfo)); |
| 3865 | } |
YOSHIFUJI Hideaki | c5396a3 | 2006-06-17 22:48:48 -0700 | [diff] [blame] | 3866 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3867 | 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] | 3868 | struct prefix_info *pinfo, u32 pid, u32 seq, |
| 3869 | int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3870 | { |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 3871 | struct prefixmsg *pmsg; |
| 3872 | struct nlmsghdr *nlh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3873 | struct prefix_cacheinfo ci; |
| 3874 | |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 3875 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags); |
| 3876 | if (nlh == NULL) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3877 | return -EMSGSIZE; |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 3878 | |
| 3879 | pmsg = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3880 | pmsg->prefix_family = AF_INET6; |
Patrick McHardy | 8a47077 | 2005-06-28 12:56:45 -0700 | [diff] [blame] | 3881 | pmsg->prefix_pad1 = 0; |
| 3882 | pmsg->prefix_pad2 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3883 | pmsg->prefix_ifindex = idev->dev->ifindex; |
| 3884 | pmsg->prefix_len = pinfo->prefix_len; |
| 3885 | pmsg->prefix_type = pinfo->type; |
Patrick McHardy | 8a47077 | 2005-06-28 12:56:45 -0700 | [diff] [blame] | 3886 | pmsg->prefix_pad3 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3887 | pmsg->prefix_flags = 0; |
| 3888 | if (pinfo->onlink) |
| 3889 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; |
| 3890 | if (pinfo->autoconf) |
| 3891 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; |
| 3892 | |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 3893 | NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3894 | |
| 3895 | ci.preferred_time = ntohl(pinfo->prefered); |
| 3896 | ci.valid_time = ntohl(pinfo->valid); |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 3897 | NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3898 | |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 3899 | return nlmsg_end(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3900 | |
Thomas Graf | 6051e2f | 2006-11-14 19:54:19 -0800 | [diff] [blame] | 3901 | nla_put_failure: |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3902 | nlmsg_cancel(skb, nlh); |
| 3903 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3904 | } |
| 3905 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3906 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3907 | struct prefix_info *pinfo) |
| 3908 | { |
| 3909 | struct sk_buff *skb; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 3910 | struct net *net = dev_net(idev->dev); |
Thomas Graf | 8c384bfa | 2006-08-15 00:36:07 -0700 | [diff] [blame] | 3911 | int err = -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3912 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 3913 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
Thomas Graf | 8c384bfa | 2006-08-15 00:36:07 -0700 | [diff] [blame] | 3914 | if (skb == NULL) |
| 3915 | goto errout; |
| 3916 | |
| 3917 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 3918 | if (err < 0) { |
| 3919 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ |
| 3920 | WARN_ON(err == -EMSGSIZE); |
| 3921 | kfree_skb(skb); |
| 3922 | goto errout; |
| 3923 | } |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 3924 | err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
Thomas Graf | 8c384bfa | 2006-08-15 00:36:07 -0700 | [diff] [blame] | 3925 | errout: |
| 3926 | if (err < 0) |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 3927 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3928 | } |
| 3929 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3930 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
| 3931 | { |
| 3932 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); |
| 3933 | |
| 3934 | switch (event) { |
| 3935 | case RTM_NEWADDR: |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 3936 | /* |
| 3937 | * If the address was optimistic |
| 3938 | * we inserted the route at the start of |
| 3939 | * our DAD process, so we don't need |
| 3940 | * to do it again |
| 3941 | */ |
| 3942 | if (!(ifp->rt->rt6i_node)) |
| 3943 | ip6_ins_rt(ifp->rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3944 | if (ifp->idev->cnf.forwarding) |
| 3945 | addrconf_join_anycast(ifp); |
| 3946 | break; |
| 3947 | case RTM_DELADDR: |
| 3948 | if (ifp->idev->cnf.forwarding) |
| 3949 | addrconf_leave_anycast(ifp); |
| 3950 | addrconf_leave_solict(ifp->idev, &ifp->addr); |
| 3951 | dst_hold(&ifp->rt->u.dst); |
Thomas Graf | e0a1ad73 | 2006-08-22 00:00:21 -0700 | [diff] [blame] | 3952 | if (ip6_del_rt(ifp->rt)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3953 | dst_free(&ifp->rt->u.dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3954 | break; |
| 3955 | } |
| 3956 | } |
| 3957 | |
| 3958 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
| 3959 | { |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 3960 | rcu_read_lock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3961 | if (likely(ifp->idev->dead == 0)) |
| 3962 | __ipv6_ifa_notify(event, ifp); |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 3963 | rcu_read_unlock_bh(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3964 | } |
| 3965 | |
| 3966 | #ifdef CONFIG_SYSCTL |
| 3967 | |
| 3968 | static |
| 3969 | int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp, |
| 3970 | void __user *buffer, size_t *lenp, loff_t *ppos) |
| 3971 | { |
| 3972 | int *valp = ctl->data; |
| 3973 | int val = *valp; |
| 3974 | int ret; |
| 3975 | |
| 3976 | ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); |
| 3977 | |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 3978 | if (write) |
| 3979 | addrconf_fixup_forwarding(ctl, valp, val); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3980 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3981 | } |
| 3982 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3983 | static int addrconf_sysctl_forward_strategy(ctl_table *table, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3984 | int __user *name, int nlen, |
| 3985 | void __user *oldval, |
| 3986 | size_t __user *oldlenp, |
Alexey Dobriyan | 1f29bcd | 2006-12-10 02:19:10 -0800 | [diff] [blame] | 3987 | void __user *newval, size_t newlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3988 | { |
| 3989 | int *valp = table->data; |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 3990 | int val = *valp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3991 | int new; |
| 3992 | |
| 3993 | if (!newval || !newlen) |
| 3994 | return 0; |
| 3995 | if (newlen != sizeof(int)) |
| 3996 | return -EINVAL; |
| 3997 | if (get_user(new, (int __user *)newval)) |
| 3998 | return -EFAULT; |
| 3999 | if (new == *valp) |
| 4000 | return 0; |
| 4001 | if (oldval && oldlenp) { |
| 4002 | size_t len; |
| 4003 | if (get_user(len, oldlenp)) |
| 4004 | return -EFAULT; |
| 4005 | if (len) { |
| 4006 | if (len > table->maxlen) |
| 4007 | len = table->maxlen; |
| 4008 | if (copy_to_user(oldval, valp, len)) |
| 4009 | return -EFAULT; |
| 4010 | if (put_user(len, oldlenp)) |
| 4011 | return -EFAULT; |
| 4012 | } |
| 4013 | } |
| 4014 | |
Pavel Emelyanov | c8fecf2 | 2007-12-05 01:50:24 -0800 | [diff] [blame] | 4015 | *valp = new; |
| 4016 | addrconf_fixup_forwarding(table, valp, val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4017 | return 1; |
| 4018 | } |
| 4019 | |
| 4020 | static struct addrconf_sysctl_table |
| 4021 | { |
| 4022 | struct ctl_table_header *sysctl_header; |
YOSHIFUJI Hideaki | f6a07b2 | 2008-03-25 00:25:11 +0900 | [diff] [blame] | 4023 | ctl_table addrconf_vars[DEVCONF_MAX+1]; |
Pavel Emelyanov | 1dab622 | 2007-12-02 00:59:38 +1100 | [diff] [blame] | 4024 | char *dev_name; |
Brian Haley | ab32ea5 | 2006-09-22 14:15:41 -0700 | [diff] [blame] | 4025 | } addrconf_sysctl __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4026 | .sysctl_header = NULL, |
| 4027 | .addrconf_vars = { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4028 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4029 | .ctl_name = NET_IPV6_FORWARDING, |
| 4030 | .procname = "forwarding", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4031 | .data = &ipv6_devconf.forwarding, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4032 | .maxlen = sizeof(int), |
| 4033 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4034 | .proc_handler = &addrconf_sysctl_forward, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4035 | .strategy = &addrconf_sysctl_forward_strategy, |
| 4036 | }, |
| 4037 | { |
| 4038 | .ctl_name = NET_IPV6_HOP_LIMIT, |
| 4039 | .procname = "hop_limit", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4040 | .data = &ipv6_devconf.hop_limit, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4041 | .maxlen = sizeof(int), |
| 4042 | .mode = 0644, |
| 4043 | .proc_handler = proc_dointvec, |
| 4044 | }, |
| 4045 | { |
| 4046 | .ctl_name = NET_IPV6_MTU, |
| 4047 | .procname = "mtu", |
| 4048 | .data = &ipv6_devconf.mtu6, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4049 | .maxlen = sizeof(int), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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_ACCEPT_RA, |
| 4055 | .procname = "accept_ra", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4056 | .data = &ipv6_devconf.accept_ra, |
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, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4060 | }, |
| 4061 | { |
| 4062 | .ctl_name = NET_IPV6_ACCEPT_REDIRECTS, |
| 4063 | .procname = "accept_redirects", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4064 | .data = &ipv6_devconf.accept_redirects, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4065 | .maxlen = sizeof(int), |
| 4066 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4067 | .proc_handler = &proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4068 | }, |
| 4069 | { |
| 4070 | .ctl_name = NET_IPV6_AUTOCONF, |
| 4071 | .procname = "autoconf", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4072 | .data = &ipv6_devconf.autoconf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4073 | .maxlen = sizeof(int), |
| 4074 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4075 | .proc_handler = &proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4076 | }, |
| 4077 | { |
| 4078 | .ctl_name = NET_IPV6_DAD_TRANSMITS, |
| 4079 | .procname = "dad_transmits", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4080 | .data = &ipv6_devconf.dad_transmits, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4081 | .maxlen = sizeof(int), |
| 4082 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4083 | .proc_handler = &proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4084 | }, |
| 4085 | { |
| 4086 | .ctl_name = NET_IPV6_RTR_SOLICITS, |
| 4087 | .procname = "router_solicitations", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4088 | .data = &ipv6_devconf.rtr_solicits, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4089 | .maxlen = sizeof(int), |
| 4090 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4091 | .proc_handler = &proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4092 | }, |
| 4093 | { |
| 4094 | .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL, |
| 4095 | .procname = "router_solicitation_interval", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4096 | .data = &ipv6_devconf.rtr_solicit_interval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4097 | .maxlen = sizeof(int), |
| 4098 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4099 | .proc_handler = &proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4100 | .strategy = &sysctl_jiffies, |
| 4101 | }, |
| 4102 | { |
| 4103 | .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY, |
| 4104 | .procname = "router_solicitation_delay", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4105 | .data = &ipv6_devconf.rtr_solicit_delay, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4106 | .maxlen = sizeof(int), |
| 4107 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4108 | .proc_handler = &proc_dointvec_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4109 | .strategy = &sysctl_jiffies, |
| 4110 | }, |
| 4111 | { |
| 4112 | .ctl_name = NET_IPV6_FORCE_MLD_VERSION, |
| 4113 | .procname = "force_mld_version", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4114 | .data = &ipv6_devconf.force_mld_version, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4115 | .maxlen = sizeof(int), |
| 4116 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4117 | .proc_handler = &proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4118 | }, |
| 4119 | #ifdef CONFIG_IPV6_PRIVACY |
| 4120 | { |
| 4121 | .ctl_name = NET_IPV6_USE_TEMPADDR, |
| 4122 | .procname = "use_tempaddr", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4123 | .data = &ipv6_devconf.use_tempaddr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4124 | .maxlen = sizeof(int), |
| 4125 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4126 | .proc_handler = &proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4127 | }, |
| 4128 | { |
| 4129 | .ctl_name = NET_IPV6_TEMP_VALID_LFT, |
| 4130 | .procname = "temp_valid_lft", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4131 | .data = &ipv6_devconf.temp_valid_lft, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4132 | .maxlen = sizeof(int), |
| 4133 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4134 | .proc_handler = &proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4135 | }, |
| 4136 | { |
| 4137 | .ctl_name = NET_IPV6_TEMP_PREFERED_LFT, |
| 4138 | .procname = "temp_prefered_lft", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4139 | .data = &ipv6_devconf.temp_prefered_lft, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4140 | .maxlen = sizeof(int), |
| 4141 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4142 | .proc_handler = &proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4143 | }, |
| 4144 | { |
| 4145 | .ctl_name = NET_IPV6_REGEN_MAX_RETRY, |
| 4146 | .procname = "regen_max_retry", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4147 | .data = &ipv6_devconf.regen_max_retry, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4148 | .maxlen = sizeof(int), |
| 4149 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4150 | .proc_handler = &proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4151 | }, |
| 4152 | { |
| 4153 | .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR, |
| 4154 | .procname = "max_desync_factor", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4155 | .data = &ipv6_devconf.max_desync_factor, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4156 | .maxlen = sizeof(int), |
| 4157 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4158 | .proc_handler = &proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4159 | }, |
| 4160 | #endif |
| 4161 | { |
| 4162 | .ctl_name = NET_IPV6_MAX_ADDRESSES, |
| 4163 | .procname = "max_addresses", |
| 4164 | .data = &ipv6_devconf.max_addresses, |
| 4165 | .maxlen = sizeof(int), |
| 4166 | .mode = 0644, |
| 4167 | .proc_handler = &proc_dointvec, |
| 4168 | }, |
| 4169 | { |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 4170 | .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR, |
| 4171 | .procname = "accept_ra_defrtr", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4172 | .data = &ipv6_devconf.accept_ra_defrtr, |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 4173 | .maxlen = sizeof(int), |
| 4174 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4175 | .proc_handler = &proc_dointvec, |
YOSHIFUJI Hideaki | 65f5c7c | 2006-03-20 16:55:08 -0800 | [diff] [blame] | 4176 | }, |
| 4177 | { |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 4178 | .ctl_name = NET_IPV6_ACCEPT_RA_PINFO, |
| 4179 | .procname = "accept_ra_pinfo", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4180 | .data = &ipv6_devconf.accept_ra_pinfo, |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 4181 | .maxlen = sizeof(int), |
| 4182 | .mode = 0644, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4183 | .proc_handler = &proc_dointvec, |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 4184 | }, |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 4185 | #ifdef CONFIG_IPV6_ROUTER_PREF |
| 4186 | { |
| 4187 | .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF, |
| 4188 | .procname = "accept_ra_rtr_pref", |
| 4189 | .data = &ipv6_devconf.accept_ra_rtr_pref, |
| 4190 | .maxlen = sizeof(int), |
| 4191 | .mode = 0644, |
| 4192 | .proc_handler = &proc_dointvec, |
| 4193 | }, |
YOSHIFUJI Hideaki | 52e1635 | 2006-03-20 17:05:47 -0800 | [diff] [blame] | 4194 | { |
| 4195 | .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL, |
| 4196 | .procname = "router_probe_interval", |
| 4197 | .data = &ipv6_devconf.rtr_probe_interval, |
| 4198 | .maxlen = sizeof(int), |
| 4199 | .mode = 0644, |
| 4200 | .proc_handler = &proc_dointvec_jiffies, |
| 4201 | .strategy = &sysctl_jiffies, |
| 4202 | }, |
Neil Horman | fa03ef3 | 2007-01-30 14:30:10 -0800 | [diff] [blame] | 4203 | #ifdef CONFIG_IPV6_ROUTE_INFO |
YOSHIFUJI Hideaki | 09c884d | 2006-03-20 17:07:03 -0800 | [diff] [blame] | 4204 | { |
| 4205 | .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN, |
| 4206 | .procname = "accept_ra_rt_info_max_plen", |
| 4207 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, |
| 4208 | .maxlen = sizeof(int), |
| 4209 | .mode = 0644, |
| 4210 | .proc_handler = &proc_dointvec, |
| 4211 | }, |
| 4212 | #endif |
YOSHIFUJI Hideaki | 930d6ff | 2006-03-20 17:05:30 -0800 | [diff] [blame] | 4213 | #endif |
YOSHIFUJI Hideaki | c4fd30e | 2006-03-20 16:55:26 -0800 | [diff] [blame] | 4214 | { |
YOSHIFUJI Hideaki | fbea49e | 2006-09-22 14:43:49 -0700 | [diff] [blame] | 4215 | .ctl_name = NET_IPV6_PROXY_NDP, |
| 4216 | .procname = "proxy_ndp", |
| 4217 | .data = &ipv6_devconf.proxy_ndp, |
| 4218 | .maxlen = sizeof(int), |
| 4219 | .mode = 0644, |
| 4220 | .proc_handler = &proc_dointvec, |
| 4221 | }, |
| 4222 | { |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 4223 | .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE, |
| 4224 | .procname = "accept_source_route", |
| 4225 | .data = &ipv6_devconf.accept_source_route, |
| 4226 | .maxlen = sizeof(int), |
| 4227 | .mode = 0644, |
| 4228 | .proc_handler = &proc_dointvec, |
| 4229 | }, |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 4230 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
| 4231 | { |
| 4232 | .ctl_name = CTL_UNNUMBERED, |
| 4233 | .procname = "optimistic_dad", |
| 4234 | .data = &ipv6_devconf.optimistic_dad, |
| 4235 | .maxlen = sizeof(int), |
| 4236 | .mode = 0644, |
| 4237 | .proc_handler = &proc_dointvec, |
| 4238 | |
| 4239 | }, |
| 4240 | #endif |
YOSHIFUJI Hideaki | 7bc570c | 2008-04-03 09:22:53 +0900 | [diff] [blame] | 4241 | #ifdef CONFIG_IPV6_MROUTE |
| 4242 | { |
| 4243 | .ctl_name = CTL_UNNUMBERED, |
| 4244 | .procname = "mc_forwarding", |
| 4245 | .data = &ipv6_devconf.mc_forwarding, |
| 4246 | .maxlen = sizeof(int), |
| 4247 | .mode = 0644, |
| 4248 | .proc_handler = &proc_dointvec, |
| 4249 | }, |
| 4250 | #endif |
YOSHIFUJI Hideaki | 0bcbc92 | 2007-04-24 14:58:30 -0700 | [diff] [blame] | 4251 | { |
YOSHIFUJI Hideaki | 778d80b | 2008-06-28 14:17:11 +0900 | [diff] [blame] | 4252 | .ctl_name = CTL_UNNUMBERED, |
| 4253 | .procname = "disable_ipv6", |
| 4254 | .data = &ipv6_devconf.disable_ipv6, |
| 4255 | .maxlen = sizeof(int), |
| 4256 | .mode = 0644, |
| 4257 | .proc_handler = &proc_dointvec, |
| 4258 | }, |
| 4259 | { |
YOSHIFUJI Hideaki | 1b34be7 | 2008-06-28 14:18:38 +0900 | [diff] [blame] | 4260 | .ctl_name = CTL_UNNUMBERED, |
| 4261 | .procname = "accept_dad", |
| 4262 | .data = &ipv6_devconf.accept_dad, |
| 4263 | .maxlen = sizeof(int), |
| 4264 | .mode = 0644, |
| 4265 | .proc_handler = &proc_dointvec, |
| 4266 | }, |
| 4267 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4268 | .ctl_name = 0, /* sentinel */ |
| 4269 | } |
| 4270 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4271 | }; |
| 4272 | |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 4273 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
| 4274 | int ctl_name, struct inet6_dev *idev, struct ipv6_devconf *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4275 | { |
| 4276 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4277 | struct addrconf_sysctl_table *t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4278 | |
Pavel Emelyanov | 1dab622 | 2007-12-02 00:59:38 +1100 | [diff] [blame] | 4279 | #define ADDRCONF_CTL_PATH_DEV 3 |
| 4280 | |
| 4281 | struct ctl_path addrconf_ctl_path[] = { |
| 4282 | { .procname = "net", .ctl_name = CTL_NET, }, |
| 4283 | { .procname = "ipv6", .ctl_name = NET_IPV6, }, |
| 4284 | { .procname = "conf", .ctl_name = NET_IPV6_CONF, }, |
| 4285 | { /* to be set */ }, |
| 4286 | { }, |
| 4287 | }; |
| 4288 | |
| 4289 | |
Arnaldo Carvalho de Melo | af879cc | 2006-11-17 12:14:37 -0200 | [diff] [blame] | 4290 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4291 | if (t == NULL) |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 4292 | goto out; |
| 4293 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4294 | for (i=0; t->addrconf_vars[i].data; i++) { |
| 4295 | t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4296 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 4297 | t->addrconf_vars[i].extra2 = net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4298 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4299 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4300 | /* |
| 4301 | * Make a copy of dev_name, because '.procname' is regarded as const |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4302 | * by sysctl and we wouldn't want anyone to change it under our feet |
| 4303 | * (see SIOCSIFNAME). |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4304 | */ |
Pavel Emelyanov | 1dab622 | 2007-12-02 00:59:38 +1100 | [diff] [blame] | 4305 | t->dev_name = kstrdup(dev_name, GFP_KERNEL); |
| 4306 | if (!t->dev_name) |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 4307 | goto free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4308 | |
Pavel Emelyanov | 1dab622 | 2007-12-02 00:59:38 +1100 | [diff] [blame] | 4309 | addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name; |
| 4310 | addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].ctl_name = ctl_name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4311 | |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 4312 | t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path, |
Pavel Emelyanov | 1dab622 | 2007-12-02 00:59:38 +1100 | [diff] [blame] | 4313 | t->addrconf_vars); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4314 | if (t->sysctl_header == NULL) |
| 4315 | goto free_procname; |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 4316 | |
| 4317 | p->sysctl = t; |
Pavel Emelyanov | 9589731 | 2008-01-10 17:41:45 -0800 | [diff] [blame] | 4318 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4319 | |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 4320 | free_procname: |
Pavel Emelyanov | 1dab622 | 2007-12-02 00:59:38 +1100 | [diff] [blame] | 4321 | kfree(t->dev_name); |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 4322 | free: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4323 | kfree(t); |
Pavel Emelyanov | f68635e | 2007-12-02 00:21:52 +1100 | [diff] [blame] | 4324 | out: |
Pavel Emelyanov | 9589731 | 2008-01-10 17:41:45 -0800 | [diff] [blame] | 4325 | return -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4326 | } |
| 4327 | |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 4328 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
| 4329 | { |
| 4330 | struct addrconf_sysctl_table *t; |
| 4331 | |
| 4332 | if (p->sysctl == NULL) |
| 4333 | return; |
| 4334 | |
| 4335 | t = p->sysctl; |
| 4336 | p->sysctl = NULL; |
| 4337 | unregister_sysctl_table(t->sysctl_header); |
| 4338 | kfree(t->dev_name); |
| 4339 | kfree(t); |
| 4340 | } |
| 4341 | |
Pavel Emelyanov | f52295a | 2007-12-02 00:58:37 +1100 | [diff] [blame] | 4342 | static void addrconf_sysctl_register(struct inet6_dev *idev) |
| 4343 | { |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 4344 | neigh_sysctl_register(idev->dev, idev->nd_parms, NET_IPV6, |
| 4345 | NET_IPV6_NEIGH, "ipv6", |
| 4346 | &ndisc_ifinfo_sysctl_change, |
YOSHIFUJI Hideaki | 0686caa | 2008-05-19 16:25:42 -0700 | [diff] [blame] | 4347 | ndisc_ifinfo_sysctl_strategy); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 4348 | __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, |
Pavel Emelyanov | bff16c2 | 2008-01-10 17:42:13 -0800 | [diff] [blame] | 4349 | idev->dev->ifindex, idev, &idev->cnf); |
Pavel Emelyanov | f52295a | 2007-12-02 00:58:37 +1100 | [diff] [blame] | 4350 | } |
| 4351 | |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 4352 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4353 | { |
Pavel Emelyanov | 408c476 | 2008-01-10 17:41:21 -0800 | [diff] [blame] | 4354 | __addrconf_sysctl_unregister(&idev->cnf); |
| 4355 | neigh_sysctl_unregister(idev->nd_parms); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4356 | } |
| 4357 | |
| 4358 | |
| 4359 | #endif |
| 4360 | |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 4361 | static int addrconf_init_net(struct net *net) |
| 4362 | { |
| 4363 | int err; |
| 4364 | struct ipv6_devconf *all, *dflt; |
| 4365 | |
| 4366 | err = -ENOMEM; |
| 4367 | all = &ipv6_devconf; |
| 4368 | dflt = &ipv6_devconf_dflt; |
| 4369 | |
| 4370 | if (net != &init_net) { |
| 4371 | all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL); |
| 4372 | if (all == NULL) |
| 4373 | goto err_alloc_all; |
| 4374 | |
| 4375 | dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); |
| 4376 | if (dflt == NULL) |
| 4377 | goto err_alloc_dflt; |
| 4378 | } |
| 4379 | |
| 4380 | net->ipv6.devconf_all = all; |
| 4381 | net->ipv6.devconf_dflt = dflt; |
| 4382 | |
| 4383 | #ifdef CONFIG_SYSCTL |
| 4384 | err = __addrconf_sysctl_register(net, "all", NET_PROTO_CONF_ALL, |
| 4385 | NULL, all); |
| 4386 | if (err < 0) |
| 4387 | goto err_reg_all; |
| 4388 | |
| 4389 | err = __addrconf_sysctl_register(net, "default", NET_PROTO_CONF_DEFAULT, |
| 4390 | NULL, dflt); |
| 4391 | if (err < 0) |
| 4392 | goto err_reg_dflt; |
| 4393 | #endif |
| 4394 | return 0; |
| 4395 | |
| 4396 | #ifdef CONFIG_SYSCTL |
| 4397 | err_reg_dflt: |
| 4398 | __addrconf_sysctl_unregister(all); |
| 4399 | err_reg_all: |
| 4400 | kfree(dflt); |
| 4401 | #endif |
| 4402 | err_alloc_dflt: |
| 4403 | kfree(all); |
| 4404 | err_alloc_all: |
| 4405 | return err; |
| 4406 | } |
| 4407 | |
| 4408 | static void addrconf_exit_net(struct net *net) |
| 4409 | { |
| 4410 | #ifdef CONFIG_SYSCTL |
| 4411 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); |
| 4412 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); |
| 4413 | #endif |
| 4414 | if (net != &init_net) { |
| 4415 | kfree(net->ipv6.devconf_dflt); |
| 4416 | kfree(net->ipv6.devconf_all); |
| 4417 | } |
| 4418 | } |
| 4419 | |
| 4420 | static struct pernet_operations addrconf_ops = { |
| 4421 | .init = addrconf_init_net, |
| 4422 | .exit = addrconf_exit_net, |
| 4423 | }; |
| 4424 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4425 | /* |
| 4426 | * Device notifier |
| 4427 | */ |
| 4428 | |
| 4429 | int register_inet6addr_notifier(struct notifier_block *nb) |
| 4430 | { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4431 | return atomic_notifier_chain_register(&inet6addr_chain, nb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4432 | } |
| 4433 | |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 4434 | EXPORT_SYMBOL(register_inet6addr_notifier); |
| 4435 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4436 | int unregister_inet6addr_notifier(struct notifier_block *nb) |
| 4437 | { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4438 | return atomic_notifier_chain_unregister(&inet6addr_chain,nb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4439 | } |
| 4440 | |
YOSHIFUJI Hideaki | 7159039 | 2007-02-22 22:05:40 +0900 | [diff] [blame] | 4441 | EXPORT_SYMBOL(unregister_inet6addr_notifier); |
| 4442 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 4443 | static void addrconf_net_exit(struct net *net) |
| 4444 | { |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 4445 | struct net_device *dev; |
| 4446 | |
Benjamin Thery | 6fda735 | 2008-03-05 10:47:47 -0800 | [diff] [blame] | 4447 | rtnl_lock(); |
| 4448 | /* clean dev list */ |
| 4449 | for_each_netdev(net, dev) { |
| 4450 | if (__in6_dev_get(dev) == NULL) |
| 4451 | continue; |
| 4452 | addrconf_ifdown(dev, 1); |
| 4453 | } |
| 4454 | addrconf_ifdown(net->loopback_dev, 2); |
| 4455 | rtnl_unlock(); |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 4456 | } |
| 4457 | |
| 4458 | static struct pernet_operations addrconf_net_ops = { |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 4459 | .exit = addrconf_net_exit, |
| 4460 | }; |
| 4461 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4462 | /* |
| 4463 | * Init / cleanup code |
| 4464 | */ |
| 4465 | |
| 4466 | int __init addrconf_init(void) |
| 4467 | { |
YOSHIFUJI Hideaki | 2a8cc6c | 2007-11-14 15:56:23 +0900 | [diff] [blame] | 4468 | int err; |
| 4469 | |
| 4470 | if ((err = ipv6_addr_label_init()) < 0) { |
| 4471 | printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n", |
| 4472 | err); |
| 4473 | return err; |
| 4474 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4475 | |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 4476 | register_pernet_subsys(&addrconf_ops); |
| 4477 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4478 | /* The addrconf netdev notifier requires that loopback_dev |
| 4479 | * has it's ipv6 private information allocated and setup |
| 4480 | * before it can bring up and give link-local addresses |
| 4481 | * to other devices which are up. |
| 4482 | * |
| 4483 | * Unfortunately, loopback_dev is not necessarily the first |
| 4484 | * entry in the global dev_base list of net devices. In fact, |
| 4485 | * it is likely to be the very last entry on that list. |
| 4486 | * So this causes the notifier registry below to try and |
| 4487 | * give link-local addresses to all devices besides loopback_dev |
| 4488 | * first, then loopback_dev, which cases all the non-loopback_dev |
| 4489 | * devices to fail to get a link-local address. |
| 4490 | * |
| 4491 | * So, as a temporary fix, allocate the ipv6 structure for |
| 4492 | * loopback_dev first by hand. |
| 4493 | * Longer term, all of the dependencies ipv6 has upon the loopback |
| 4494 | * device and it being up should be removed. |
| 4495 | */ |
| 4496 | rtnl_lock(); |
Eric W. Biederman | 2774c7a | 2007-09-26 22:10:56 -0700 | [diff] [blame] | 4497 | if (!ipv6_add_dev(init_net.loopback_dev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4498 | err = -ENOMEM; |
| 4499 | rtnl_unlock(); |
| 4500 | if (err) |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 4501 | goto errlo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4502 | |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 4503 | err = register_pernet_device(&addrconf_net_ops); |
| 4504 | if (err) |
| 4505 | return err; |
| 4506 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4507 | register_netdevice_notifier(&ipv6_dev_notf); |
| 4508 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4509 | addrconf_verify(0); |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 4510 | |
| 4511 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo); |
| 4512 | if (err < 0) |
| 4513 | goto errout; |
| 4514 | |
| 4515 | /* Only the first call to __rtnl_register can fail */ |
| 4516 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL); |
| 4517 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL); |
| 4518 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr); |
| 4519 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr); |
| 4520 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr); |
| 4521 | |
YOSHIFUJI Hideaki | 2a8cc6c | 2007-11-14 15:56:23 +0900 | [diff] [blame] | 4522 | ipv6_addr_label_rtnl_register(); |
| 4523 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4524 | return 0; |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 4525 | errout: |
| 4526 | unregister_netdevice_notifier(&ipv6_dev_notf); |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 4527 | errlo: |
| 4528 | unregister_pernet_subsys(&addrconf_ops); |
Thomas Graf | c127ea2 | 2007-03-22 11:58:32 -0700 | [diff] [blame] | 4529 | |
| 4530 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4531 | } |
| 4532 | |
Daniel Lezcano | 09f7709 | 2007-12-13 05:34:58 -0800 | [diff] [blame] | 4533 | void addrconf_cleanup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4534 | { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4535 | struct inet6_ifaddr *ifa; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4536 | int i; |
| 4537 | |
| 4538 | unregister_netdevice_notifier(&ipv6_dev_notf); |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 4539 | unregister_pernet_device(&addrconf_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4540 | |
Pavel Emelyanov | e0da5a4 | 2008-01-10 17:42:55 -0800 | [diff] [blame] | 4541 | unregister_pernet_subsys(&addrconf_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4542 | |
| 4543 | rtnl_lock(); |
| 4544 | |
| 4545 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4546 | * Check hash table. |
| 4547 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4548 | write_lock_bh(&addrconf_hash_lock); |
| 4549 | for (i=0; i < IN6_ADDR_HSIZE; i++) { |
| 4550 | for (ifa=inet6_addr_lst[i]; ifa; ) { |
| 4551 | struct inet6_ifaddr *bifa; |
| 4552 | |
| 4553 | bifa = ifa; |
| 4554 | ifa = ifa->lst_next; |
| 4555 | printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa); |
| 4556 | /* Do not free it; something is wrong. |
| 4557 | Now we can investigate it with debugger. |
| 4558 | */ |
| 4559 | } |
| 4560 | } |
| 4561 | write_unlock_bh(&addrconf_hash_lock); |
| 4562 | |
| 4563 | del_timer(&addr_chk_timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4564 | rtnl_unlock(); |
Daniel Lezcano | af28493 | 2008-03-05 10:46:57 -0800 | [diff] [blame] | 4565 | |
| 4566 | unregister_pernet_subsys(&addrconf_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4567 | } |