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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * IPv6 Address [auto]configuration | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> |
8 | * | |
1da177e4 LT |
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. | |
b1cacb68 YH |
36 | * YOSHIFUJI Hideaki @USAGI : improved source address |
37 | * selection; consider scope, | |
38 | * status etc. | |
1da177e4 LT |
39 | */ |
40 | ||
f3213831 JP |
41 | #define pr_fmt(fmt) "IPv6: " fmt |
42 | ||
1da177e4 LT |
43 | #include <linux/errno.h> |
44 | #include <linux/types.h> | |
a0bffffc | 45 | #include <linux/kernel.h> |
1da177e4 LT |
46 | #include <linux/socket.h> |
47 | #include <linux/sockios.h> | |
1da177e4 | 48 | #include <linux/net.h> |
3d1bec99 | 49 | #include <linux/inet.h> |
1da177e4 LT |
50 | #include <linux/in6.h> |
51 | #include <linux/netdevice.h> | |
1823730f | 52 | #include <linux/if_addr.h> |
1da177e4 LT |
53 | #include <linux/if_arp.h> |
54 | #include <linux/if_arcnet.h> | |
55 | #include <linux/if_infiniband.h> | |
56 | #include <linux/route.h> | |
57 | #include <linux/inetdevice.h> | |
58 | #include <linux/init.h> | |
5a0e3ad6 | 59 | #include <linux/slab.h> |
1da177e4 LT |
60 | #ifdef CONFIG_SYSCTL |
61 | #include <linux/sysctl.h> | |
62 | #endif | |
4fc268d2 | 63 | #include <linux/capability.h> |
1da177e4 LT |
64 | #include <linux/delay.h> |
65 | #include <linux/notifier.h> | |
543537bd | 66 | #include <linux/string.h> |
ddbe5032 | 67 | #include <linux/hash.h> |
1da177e4 | 68 | |
457c4cbc | 69 | #include <net/net_namespace.h> |
1da177e4 LT |
70 | #include <net/sock.h> |
71 | #include <net/snmp.h> | |
72 | ||
06a4c1c5 | 73 | #include <net/af_ieee802154.h> |
cb6bf355 | 74 | #include <net/firewire.h> |
1da177e4 LT |
75 | #include <net/ipv6.h> |
76 | #include <net/protocol.h> | |
77 | #include <net/ndisc.h> | |
78 | #include <net/ip6_route.h> | |
79 | #include <net/addrconf.h> | |
80 | #include <net/tcp.h> | |
81 | #include <net/ip.h> | |
5d620266 | 82 | #include <net/netlink.h> |
f24e3d65 | 83 | #include <net/pkt_sched.h> |
ca254490 | 84 | #include <net/l3mdev.h> |
1da177e4 LT |
85 | #include <linux/if_tunnel.h> |
86 | #include <linux/rtnetlink.h> | |
f3a1bfb1 | 87 | #include <linux/netconf.h> |
1da177e4 | 88 | #include <linux/random.h> |
e21e8467 | 89 | #include <linux/uaccess.h> |
7f7d9a6b | 90 | #include <asm/unaligned.h> |
1da177e4 LT |
91 | |
92 | #include <linux/proc_fs.h> | |
93 | #include <linux/seq_file.h> | |
bc3b2d7f | 94 | #include <linux/export.h> |
1da177e4 LT |
95 | |
96 | /* Set to 3 to get tracing... */ | |
97 | #define ACONF_DEBUG 2 | |
98 | ||
99 | #if ACONF_DEBUG >= 3 | |
ba3542e1 | 100 | #define ADBG(fmt, ...) printk(fmt, ##__VA_ARGS__) |
1da177e4 | 101 | #else |
ba3542e1 | 102 | #define ADBG(fmt, ...) do { if (0) printk(fmt, ##__VA_ARGS__); } while (0) |
1da177e4 LT |
103 | #endif |
104 | ||
105 | #define INFINITY_LIFE_TIME 0xFFFFFFFF | |
18a31e1e | 106 | |
3d1bec99 HFS |
107 | #define IPV6_MAX_STRLEN \ |
108 | sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255") | |
109 | ||
18a31e1e TG |
110 | static inline u32 cstamp_delta(unsigned long cstamp) |
111 | { | |
112 | return (cstamp - INITIAL_JIFFIES) * 100UL / HZ; | |
113 | } | |
1da177e4 LT |
114 | |
115 | #ifdef CONFIG_SYSCTL | |
a317a2f1 | 116 | static int addrconf_sysctl_register(struct inet6_dev *idev); |
408c4768 PE |
117 | static void addrconf_sysctl_unregister(struct inet6_dev *idev); |
118 | #else | |
a317a2f1 | 119 | static inline int addrconf_sysctl_register(struct inet6_dev *idev) |
408c4768 | 120 | { |
a317a2f1 | 121 | return 0; |
408c4768 PE |
122 | } |
123 | ||
124 | static inline void addrconf_sysctl_unregister(struct inet6_dev *idev) | |
125 | { | |
126 | } | |
1da177e4 LT |
127 | #endif |
128 | ||
eb7e0575 SD |
129 | static void __ipv6_regen_rndid(struct inet6_dev *idev); |
130 | static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); | |
1da177e4 | 131 | static void ipv6_regen_rndid(unsigned long data); |
1da177e4 | 132 | |
1b34be74 | 133 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev); |
1da177e4 | 134 | static int ipv6_count_addresses(struct inet6_dev *idev); |
622c81d5 HFS |
135 | static int ipv6_generate_stable_address(struct in6_addr *addr, |
136 | u8 dad_count, | |
137 | const struct inet6_dev *idev); | |
1da177e4 LT |
138 | |
139 | /* | |
140 | * Configured unicast address hash table | |
141 | */ | |
c2e21293 | 142 | static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE]; |
5c578aed | 143 | static DEFINE_SPINLOCK(addrconf_hash_lock); |
1da177e4 | 144 | |
c15b1cca HFS |
145 | static void addrconf_verify(void); |
146 | static void addrconf_verify_rtnl(void); | |
147 | static void addrconf_verify_work(struct work_struct *); | |
1da177e4 | 148 | |
c15b1cca HFS |
149 | static struct workqueue_struct *addrconf_wq; |
150 | static DECLARE_DELAYED_WORK(addr_chk_work, addrconf_verify_work); | |
1da177e4 LT |
151 | |
152 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
153 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
154 | ||
93d9b7d7 JP |
155 | static void addrconf_type_change(struct net_device *dev, |
156 | unsigned long event); | |
1da177e4 LT |
157 | static int addrconf_ifdown(struct net_device *dev, int how); |
158 | ||
21caa662 RK |
159 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, |
160 | int plen, | |
161 | const struct net_device *dev, | |
162 | u32 flags, u32 noflags); | |
163 | ||
cf22f9a2 | 164 | static void addrconf_dad_start(struct inet6_ifaddr *ifp); |
c15b1cca | 165 | static void addrconf_dad_work(struct work_struct *w); |
1da177e4 | 166 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); |
c5e33bdd | 167 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
168 | static void addrconf_rs_timer(unsigned long data); |
169 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
170 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
171 | ||
1ab1457c | 172 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 | 173 | struct prefix_info *pinfo); |
3e81c6da DM |
174 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
175 | struct net_device *dev); | |
1da177e4 | 176 | |
888c848e | 177 | static struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
178 | .forwarding = 0, |
179 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
180 | .mtu6 = IPV6_MIN_MTU, | |
181 | .accept_ra = 1, | |
182 | .accept_redirects = 1, | |
183 | .autoconf = 1, | |
184 | .force_mld_version = 0, | |
fc4eba58 HFS |
185 | .mldv1_unsolicited_report_interval = 10 * HZ, |
186 | .mldv2_unsolicited_report_interval = HZ, | |
1da177e4 LT |
187 | .dad_transmits = 1, |
188 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
189 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
190 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
67ba4152 | 191 | .use_tempaddr = 0, |
1da177e4 LT |
192 | .temp_valid_lft = TEMP_VALID_LIFETIME, |
193 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
194 | .regen_max_retry = REGEN_MAX_RETRY, | |
195 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
1da177e4 | 196 | .max_addresses = IPV6_MAX_ADDRESSES, |
65f5c7c1 | 197 | .accept_ra_defrtr = 1, |
d9333196 | 198 | .accept_ra_from_local = 0, |
8013d1d7 | 199 | .accept_ra_min_hop_limit= 1, |
c4fd30eb | 200 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
201 | #ifdef CONFIG_IPV6_ROUTER_PREF |
202 | .accept_ra_rtr_pref = 1, | |
52e16356 | 203 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
204 | #ifdef CONFIG_IPV6_ROUTE_INFO |
205 | .accept_ra_rt_info_max_plen = 0, | |
206 | #endif | |
930d6ff2 | 207 | #endif |
fbea49e1 | 208 | .proxy_ndp = 0, |
0bcbc926 | 209 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 210 | .disable_ipv6 = 0, |
1b34be74 | 211 | .accept_dad = 1, |
b800c3b9 | 212 | .suppress_frag_ndisc = 1, |
c2943f14 | 213 | .accept_ra_mtu = 1, |
3d1bec99 HFS |
214 | .stable_secret = { |
215 | .initialized = false, | |
3985e8a3 EK |
216 | }, |
217 | .use_oif_addrs_only = 0, | |
35103d11 | 218 | .ignore_routes_with_linkdown = 0, |
1da177e4 LT |
219 | }; |
220 | ||
ab32ea5d | 221 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
222 | .forwarding = 0, |
223 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
224 | .mtu6 = IPV6_MIN_MTU, | |
225 | .accept_ra = 1, | |
226 | .accept_redirects = 1, | |
227 | .autoconf = 1, | |
fc4eba58 HFS |
228 | .force_mld_version = 0, |
229 | .mldv1_unsolicited_report_interval = 10 * HZ, | |
230 | .mldv2_unsolicited_report_interval = HZ, | |
1da177e4 LT |
231 | .dad_transmits = 1, |
232 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
233 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
234 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
1da177e4 LT |
235 | .use_tempaddr = 0, |
236 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
237 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
238 | .regen_max_retry = REGEN_MAX_RETRY, | |
239 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
1da177e4 | 240 | .max_addresses = IPV6_MAX_ADDRESSES, |
65f5c7c1 | 241 | .accept_ra_defrtr = 1, |
d9333196 | 242 | .accept_ra_from_local = 0, |
8013d1d7 | 243 | .accept_ra_min_hop_limit= 1, |
c4fd30eb | 244 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
245 | #ifdef CONFIG_IPV6_ROUTER_PREF |
246 | .accept_ra_rtr_pref = 1, | |
52e16356 | 247 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
248 | #ifdef CONFIG_IPV6_ROUTE_INFO |
249 | .accept_ra_rt_info_max_plen = 0, | |
250 | #endif | |
930d6ff2 | 251 | #endif |
fbea49e1 | 252 | .proxy_ndp = 0, |
0bcbc926 | 253 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 254 | .disable_ipv6 = 0, |
1b34be74 | 255 | .accept_dad = 1, |
b800c3b9 | 256 | .suppress_frag_ndisc = 1, |
c2943f14 | 257 | .accept_ra_mtu = 1, |
3d1bec99 HFS |
258 | .stable_secret = { |
259 | .initialized = false, | |
260 | }, | |
3985e8a3 | 261 | .use_oif_addrs_only = 0, |
35103d11 | 262 | .ignore_routes_with_linkdown = 0, |
1da177e4 LT |
263 | }; |
264 | ||
f24e3d65 | 265 | /* Check if a valid qdisc is available */ |
05297949 | 266 | static inline bool addrconf_qdisc_ok(const struct net_device *dev) |
f24e3d65 | 267 | { |
05297949 | 268 | return !qdisc_tx_is_noop(dev); |
f24e3d65 MC |
269 | } |
270 | ||
b7b1bfce | 271 | static void addrconf_del_rs_timer(struct inet6_dev *idev) |
1da177e4 | 272 | { |
b7b1bfce HFS |
273 | if (del_timer(&idev->rs_timer)) |
274 | __in6_dev_put(idev); | |
275 | } | |
276 | ||
c15b1cca | 277 | static void addrconf_del_dad_work(struct inet6_ifaddr *ifp) |
b7b1bfce | 278 | { |
c15b1cca | 279 | if (cancel_delayed_work(&ifp->dad_work)) |
1da177e4 LT |
280 | __in6_ifa_put(ifp); |
281 | } | |
282 | ||
b7b1bfce HFS |
283 | static void addrconf_mod_rs_timer(struct inet6_dev *idev, |
284 | unsigned long when) | |
285 | { | |
286 | if (!timer_pending(&idev->rs_timer)) | |
287 | in6_dev_hold(idev); | |
288 | mod_timer(&idev->rs_timer, jiffies + when); | |
289 | } | |
1da177e4 | 290 | |
c15b1cca HFS |
291 | static void addrconf_mod_dad_work(struct inet6_ifaddr *ifp, |
292 | unsigned long delay) | |
1da177e4 | 293 | { |
c15b1cca | 294 | if (!delayed_work_pending(&ifp->dad_work)) |
1da177e4 | 295 | in6_ifa_hold(ifp); |
c15b1cca | 296 | mod_delayed_work(addrconf_wq, &ifp->dad_work, delay); |
1da177e4 LT |
297 | } |
298 | ||
7f7d9a6b HX |
299 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
300 | { | |
827da44c JS |
301 | int i; |
302 | ||
698365fa WC |
303 | idev->stats.ipv6 = alloc_percpu(struct ipstats_mib); |
304 | if (!idev->stats.ipv6) | |
7f7d9a6b | 305 | goto err_ip; |
827da44c JS |
306 | |
307 | for_each_possible_cpu(i) { | |
308 | struct ipstats_mib *addrconf_stats; | |
698365fa | 309 | addrconf_stats = per_cpu_ptr(idev->stats.ipv6, i); |
827da44c | 310 | u64_stats_init(&addrconf_stats->syncp); |
827da44c JS |
311 | } |
312 | ||
313 | ||
be281e55 ED |
314 | idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device), |
315 | GFP_KERNEL); | |
316 | if (!idev->stats.icmpv6dev) | |
7f7d9a6b | 317 | goto err_icmp; |
be281e55 ED |
318 | idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device), |
319 | GFP_KERNEL); | |
320 | if (!idev->stats.icmpv6msgdev) | |
14878f75 | 321 | goto err_icmpmsg; |
7f7d9a6b HX |
322 | |
323 | return 0; | |
324 | ||
14878f75 | 325 | err_icmpmsg: |
be281e55 | 326 | kfree(idev->stats.icmpv6dev); |
7f7d9a6b | 327 | err_icmp: |
698365fa | 328 | free_percpu(idev->stats.ipv6); |
7f7d9a6b | 329 | err_ip: |
aaf70ec7 | 330 | return -ENOMEM; |
7f7d9a6b HX |
331 | } |
332 | ||
8e5e8f30 | 333 | static struct inet6_dev *ipv6_add_dev(struct net_device *dev) |
1da177e4 LT |
334 | { |
335 | struct inet6_dev *ndev; | |
a317a2f1 | 336 | int err = -ENOMEM; |
1da177e4 LT |
337 | |
338 | ASSERT_RTNL(); | |
339 | ||
340 | if (dev->mtu < IPV6_MIN_MTU) | |
a317a2f1 | 341 | return ERR_PTR(-EINVAL); |
1da177e4 | 342 | |
1ab1457c | 343 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
63159f29 | 344 | if (!ndev) |
a317a2f1 | 345 | return ERR_PTR(err); |
322f74a4 IO |
346 | |
347 | rwlock_init(&ndev->lock); | |
348 | ndev->dev = dev; | |
502a2ffd | 349 | INIT_LIST_HEAD(&ndev->addr_list); |
b7b1bfce HFS |
350 | setup_timer(&ndev->rs_timer, addrconf_rs_timer, |
351 | (unsigned long)ndev); | |
c346dca1 | 352 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
322f74a4 IO |
353 | ndev->cnf.mtu6 = dev->mtu; |
354 | ndev->cnf.sysctl = NULL; | |
355 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
63159f29 | 356 | if (!ndev->nd_parms) { |
322f74a4 | 357 | kfree(ndev); |
a317a2f1 | 358 | return ERR_PTR(err); |
322f74a4 | 359 | } |
0187bdfb BH |
360 | if (ndev->cnf.forwarding) |
361 | dev_disable_lro(dev); | |
322f74a4 IO |
362 | /* We refer to the device */ |
363 | dev_hold(dev); | |
1da177e4 | 364 | |
322f74a4 | 365 | if (snmp6_alloc_dev(ndev) < 0) { |
ba3542e1 | 366 | ADBG(KERN_WARNING |
f3213831 | 367 | "%s: cannot allocate memory for statistics; dev=%s.\n", |
ba3542e1 | 368 | __func__, dev->name); |
322f74a4 | 369 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
8603e33d RL |
370 | dev_put(dev); |
371 | kfree(ndev); | |
a317a2f1 | 372 | return ERR_PTR(err); |
322f74a4 | 373 | } |
1da177e4 | 374 | |
322f74a4 | 375 | if (snmp6_register_dev(ndev) < 0) { |
ba3542e1 | 376 | ADBG(KERN_WARNING |
f3213831 | 377 | "%s: cannot create /proc/net/dev_snmp6/%s\n", |
ba3542e1 | 378 | __func__, dev->name); |
a317a2f1 | 379 | goto err_release; |
322f74a4 IO |
380 | } |
381 | ||
382 | /* One reference from device. We must do this before | |
383 | * we invoke __ipv6_regen_rndid(). | |
384 | */ | |
385 | in6_dev_hold(ndev); | |
1da177e4 | 386 | |
1b34be74 YH |
387 | if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) |
388 | ndev->cnf.accept_dad = -1; | |
389 | ||
07a93626 | 390 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
b077d7ab | 391 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { |
f3213831 | 392 | pr_info("%s: Disabled Multicast RS\n", dev->name); |
b077d7ab YH |
393 | ndev->cnf.rtr_solicits = 0; |
394 | } | |
395 | #endif | |
396 | ||
372e6c8f | 397 | INIT_LIST_HEAD(&ndev->tempaddr_list); |
b24b8a24 | 398 | setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
322f74a4 IO |
399 | if ((dev->flags&IFF_LOOPBACK) || |
400 | dev->type == ARPHRD_TUNNEL || | |
9625ed72 | 401 | dev->type == ARPHRD_TUNNEL6 || |
0be669bb | 402 | dev->type == ARPHRD_SIT || |
0be669bb | 403 | dev->type == ARPHRD_NONE) { |
322f74a4 IO |
404 | ndev->cnf.use_tempaddr = -1; |
405 | } else { | |
406 | in6_dev_hold(ndev); | |
407 | ipv6_regen_rndid((unsigned long) ndev); | |
408 | } | |
5d9efa7e | 409 | |
914faa14 | 410 | ndev->token = in6addr_any; |
1da177e4 | 411 | |
f24e3d65 | 412 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
53aadcc9 HX |
413 | ndev->if_flags |= IF_READY; |
414 | ||
322f74a4 IO |
415 | ipv6_mc_init_dev(ndev); |
416 | ndev->tstamp = jiffies; | |
a317a2f1 WC |
417 | err = addrconf_sysctl_register(ndev); |
418 | if (err) { | |
419 | ipv6_mc_destroy_dev(ndev); | |
420 | del_timer(&ndev->regen_timer); | |
2a189f9e | 421 | snmp6_unregister_dev(ndev); |
a317a2f1 WC |
422 | goto err_release; |
423 | } | |
30c4cf57 | 424 | /* protected by rtnl_lock */ |
cf778b00 | 425 | rcu_assign_pointer(dev->ip6_ptr, ndev); |
d88ae4cc | 426 | |
2c5e8933 HFS |
427 | /* Join interface-local all-node multicast group */ |
428 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allnodes); | |
429 | ||
d88ae4cc | 430 | /* Join all-node multicast group */ |
f3ee4010 | 431 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
d88ae4cc | 432 | |
d6ddef9e | 433 | /* Join all-router multicast group if forwarding is set */ |
8b2aaede | 434 | if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST)) |
d6ddef9e LW |
435 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
436 | ||
1da177e4 | 437 | return ndev; |
a317a2f1 WC |
438 | |
439 | err_release: | |
440 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
441 | ndev->dead = 1; | |
442 | in6_dev_finish_destroy(ndev); | |
443 | return ERR_PTR(err); | |
1da177e4 LT |
444 | } |
445 | ||
8e5e8f30 | 446 | static struct inet6_dev *ipv6_find_idev(struct net_device *dev) |
1da177e4 LT |
447 | { |
448 | struct inet6_dev *idev; | |
449 | ||
450 | ASSERT_RTNL(); | |
451 | ||
e21e8467 SH |
452 | idev = __in6_dev_get(dev); |
453 | if (!idev) { | |
454 | idev = ipv6_add_dev(dev); | |
a317a2f1 | 455 | if (IS_ERR(idev)) |
1da177e4 LT |
456 | return NULL; |
457 | } | |
c5e33bdd | 458 | |
1da177e4 LT |
459 | if (dev->flags&IFF_UP) |
460 | ipv6_mc_up(idev); | |
461 | return idev; | |
462 | } | |
463 | ||
f3a1bfb1 ND |
464 | static int inet6_netconf_msgsize_devconf(int type) |
465 | { | |
466 | int size = NLMSG_ALIGN(sizeof(struct netconfmsg)) | |
467 | + nla_total_size(4); /* NETCONFA_IFINDEX */ | |
468 | ||
76f8f6cb ND |
469 | /* type -1 is used for ALL */ |
470 | if (type == -1 || type == NETCONFA_FORWARDING) | |
f3a1bfb1 | 471 | size += nla_total_size(4); |
b1afce95 | 472 | #ifdef CONFIG_IPV6_MROUTE |
d67b8c61 ND |
473 | if (type == -1 || type == NETCONFA_MC_FORWARDING) |
474 | size += nla_total_size(4); | |
b1afce95 | 475 | #endif |
c92d5491 | 476 | if (type == -1 || type == NETCONFA_PROXY_NEIGH) |
477 | size += nla_total_size(4); | |
f3a1bfb1 | 478 | |
35103d11 AG |
479 | if (type == -1 || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) |
480 | size += nla_total_size(4); | |
481 | ||
f3a1bfb1 ND |
482 | return size; |
483 | } | |
484 | ||
485 | static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex, | |
486 | struct ipv6_devconf *devconf, u32 portid, | |
487 | u32 seq, int event, unsigned int flags, | |
488 | int type) | |
489 | { | |
490 | struct nlmsghdr *nlh; | |
491 | struct netconfmsg *ncm; | |
492 | ||
493 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg), | |
494 | flags); | |
63159f29 | 495 | if (!nlh) |
f3a1bfb1 ND |
496 | return -EMSGSIZE; |
497 | ||
498 | ncm = nlmsg_data(nlh); | |
499 | ncm->ncm_family = AF_INET6; | |
500 | ||
501 | if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0) | |
502 | goto nla_put_failure; | |
503 | ||
76f8f6cb ND |
504 | /* type -1 is used for ALL */ |
505 | if ((type == -1 || type == NETCONFA_FORWARDING) && | |
f3a1bfb1 ND |
506 | nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0) |
507 | goto nla_put_failure; | |
b1afce95 | 508 | #ifdef CONFIG_IPV6_MROUTE |
d67b8c61 ND |
509 | if ((type == -1 || type == NETCONFA_MC_FORWARDING) && |
510 | nla_put_s32(skb, NETCONFA_MC_FORWARDING, | |
511 | devconf->mc_forwarding) < 0) | |
512 | goto nla_put_failure; | |
b1afce95 | 513 | #endif |
c92d5491 | 514 | if ((type == -1 || type == NETCONFA_PROXY_NEIGH) && |
515 | nla_put_s32(skb, NETCONFA_PROXY_NEIGH, devconf->proxy_ndp) < 0) | |
516 | goto nla_put_failure; | |
517 | ||
35103d11 AG |
518 | if ((type == -1 || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) && |
519 | nla_put_s32(skb, NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, | |
520 | devconf->ignore_routes_with_linkdown) < 0) | |
521 | goto nla_put_failure; | |
522 | ||
053c095a JB |
523 | nlmsg_end(skb, nlh); |
524 | return 0; | |
f3a1bfb1 ND |
525 | |
526 | nla_put_failure: | |
527 | nlmsg_cancel(skb, nlh); | |
528 | return -EMSGSIZE; | |
529 | } | |
530 | ||
d67b8c61 ND |
531 | void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex, |
532 | struct ipv6_devconf *devconf) | |
f3a1bfb1 ND |
533 | { |
534 | struct sk_buff *skb; | |
535 | int err = -ENOBUFS; | |
536 | ||
537 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(type), GFP_ATOMIC); | |
63159f29 | 538 | if (!skb) |
f3a1bfb1 ND |
539 | goto errout; |
540 | ||
541 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, 0, 0, | |
542 | RTM_NEWNETCONF, 0, type); | |
543 | if (err < 0) { | |
544 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
545 | WARN_ON(err == -EMSGSIZE); | |
546 | kfree_skb(skb); | |
547 | goto errout; | |
548 | } | |
549 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_NETCONF, NULL, GFP_ATOMIC); | |
550 | return; | |
551 | errout: | |
bd779028 | 552 | rtnl_set_sk_err(net, RTNLGRP_IPV6_NETCONF, err); |
f3a1bfb1 ND |
553 | } |
554 | ||
76f8f6cb ND |
555 | static const struct nla_policy devconf_ipv6_policy[NETCONFA_MAX+1] = { |
556 | [NETCONFA_IFINDEX] = { .len = sizeof(int) }, | |
557 | [NETCONFA_FORWARDING] = { .len = sizeof(int) }, | |
c92d5491 | 558 | [NETCONFA_PROXY_NEIGH] = { .len = sizeof(int) }, |
35103d11 | 559 | [NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN] = { .len = sizeof(int) }, |
76f8f6cb ND |
560 | }; |
561 | ||
562 | static int inet6_netconf_get_devconf(struct sk_buff *in_skb, | |
661d2967 | 563 | struct nlmsghdr *nlh) |
76f8f6cb ND |
564 | { |
565 | struct net *net = sock_net(in_skb->sk); | |
566 | struct nlattr *tb[NETCONFA_MAX+1]; | |
567 | struct netconfmsg *ncm; | |
568 | struct sk_buff *skb; | |
569 | struct ipv6_devconf *devconf; | |
570 | struct inet6_dev *in6_dev; | |
571 | struct net_device *dev; | |
572 | int ifindex; | |
573 | int err; | |
574 | ||
575 | err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX, | |
576 | devconf_ipv6_policy); | |
577 | if (err < 0) | |
578 | goto errout; | |
579 | ||
580 | err = EINVAL; | |
581 | if (!tb[NETCONFA_IFINDEX]) | |
582 | goto errout; | |
583 | ||
584 | ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]); | |
585 | switch (ifindex) { | |
586 | case NETCONFA_IFINDEX_ALL: | |
587 | devconf = net->ipv6.devconf_all; | |
588 | break; | |
589 | case NETCONFA_IFINDEX_DEFAULT: | |
590 | devconf = net->ipv6.devconf_dflt; | |
591 | break; | |
592 | default: | |
593 | dev = __dev_get_by_index(net, ifindex); | |
63159f29 | 594 | if (!dev) |
76f8f6cb ND |
595 | goto errout; |
596 | in6_dev = __in6_dev_get(dev); | |
63159f29 | 597 | if (!in6_dev) |
76f8f6cb ND |
598 | goto errout; |
599 | devconf = &in6_dev->cnf; | |
600 | break; | |
601 | } | |
602 | ||
603 | err = -ENOBUFS; | |
604 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(-1), GFP_ATOMIC); | |
63159f29 | 605 | if (!skb) |
76f8f6cb ND |
606 | goto errout; |
607 | ||
608 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, | |
609 | NETLINK_CB(in_skb).portid, | |
610 | nlh->nlmsg_seq, RTM_NEWNETCONF, 0, | |
611 | -1); | |
612 | if (err < 0) { | |
613 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
614 | WARN_ON(err == -EMSGSIZE); | |
615 | kfree_skb(skb); | |
616 | goto errout; | |
617 | } | |
618 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); | |
619 | errout: | |
620 | return err; | |
621 | } | |
622 | ||
7a674200 ND |
623 | static int inet6_netconf_dump_devconf(struct sk_buff *skb, |
624 | struct netlink_callback *cb) | |
625 | { | |
626 | struct net *net = sock_net(skb->sk); | |
627 | int h, s_h; | |
628 | int idx, s_idx; | |
629 | struct net_device *dev; | |
630 | struct inet6_dev *idev; | |
631 | struct hlist_head *head; | |
632 | ||
633 | s_h = cb->args[0]; | |
634 | s_idx = idx = cb->args[1]; | |
635 | ||
636 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
637 | idx = 0; | |
638 | head = &net->dev_index_head[h]; | |
639 | rcu_read_lock(); | |
63998ac2 ND |
640 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ |
641 | net->dev_base_seq; | |
7a674200 ND |
642 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
643 | if (idx < s_idx) | |
644 | goto cont; | |
645 | idev = __in6_dev_get(dev); | |
646 | if (!idev) | |
647 | goto cont; | |
648 | ||
649 | if (inet6_netconf_fill_devconf(skb, dev->ifindex, | |
650 | &idev->cnf, | |
651 | NETLINK_CB(cb->skb).portid, | |
652 | cb->nlh->nlmsg_seq, | |
653 | RTM_NEWNETCONF, | |
654 | NLM_F_MULTI, | |
053c095a | 655 | -1) < 0) { |
7a674200 ND |
656 | rcu_read_unlock(); |
657 | goto done; | |
658 | } | |
63998ac2 | 659 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
7a674200 ND |
660 | cont: |
661 | idx++; | |
662 | } | |
663 | rcu_read_unlock(); | |
664 | } | |
665 | if (h == NETDEV_HASHENTRIES) { | |
666 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL, | |
667 | net->ipv6.devconf_all, | |
668 | NETLINK_CB(cb->skb).portid, | |
669 | cb->nlh->nlmsg_seq, | |
670 | RTM_NEWNETCONF, NLM_F_MULTI, | |
053c095a | 671 | -1) < 0) |
7a674200 ND |
672 | goto done; |
673 | else | |
674 | h++; | |
675 | } | |
676 | if (h == NETDEV_HASHENTRIES + 1) { | |
677 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT, | |
678 | net->ipv6.devconf_dflt, | |
679 | NETLINK_CB(cb->skb).portid, | |
680 | cb->nlh->nlmsg_seq, | |
681 | RTM_NEWNETCONF, NLM_F_MULTI, | |
053c095a | 682 | -1) < 0) |
7a674200 ND |
683 | goto done; |
684 | else | |
685 | h++; | |
686 | } | |
687 | done: | |
688 | cb->args[0] = h; | |
689 | cb->args[1] = idx; | |
690 | ||
691 | return skb->len; | |
692 | } | |
693 | ||
1da177e4 LT |
694 | #ifdef CONFIG_SYSCTL |
695 | static void dev_forward_change(struct inet6_dev *idev) | |
696 | { | |
697 | struct net_device *dev; | |
698 | struct inet6_ifaddr *ifa; | |
1da177e4 LT |
699 | |
700 | if (!idev) | |
701 | return; | |
702 | dev = idev->dev; | |
0187bdfb BH |
703 | if (idev->cnf.forwarding) |
704 | dev_disable_lro(dev); | |
1a940835 | 705 | if (dev->flags & IFF_MULTICAST) { |
2c5e8933 | 706 | if (idev->cnf.forwarding) { |
f3ee4010 | 707 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
708 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allrouters); |
709 | ipv6_dev_mc_inc(dev, &in6addr_sitelocal_allrouters); | |
710 | } else { | |
f3ee4010 | 711 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
712 | ipv6_dev_mc_dec(dev, &in6addr_interfacelocal_allrouters); |
713 | ipv6_dev_mc_dec(dev, &in6addr_sitelocal_allrouters); | |
714 | } | |
1da177e4 | 715 | } |
502a2ffd | 716 | |
717 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
2c12a74c MW |
718 | if (ifa->flags&IFA_F_TENTATIVE) |
719 | continue; | |
1da177e4 LT |
720 | if (idev->cnf.forwarding) |
721 | addrconf_join_anycast(ifa); | |
722 | else | |
723 | addrconf_leave_anycast(ifa); | |
724 | } | |
f3a1bfb1 ND |
725 | inet6_netconf_notify_devconf(dev_net(dev), NETCONFA_FORWARDING, |
726 | dev->ifindex, &idev->cnf); | |
1da177e4 LT |
727 | } |
728 | ||
729 | ||
e186932b | 730 | static void addrconf_forward_change(struct net *net, __s32 newf) |
1da177e4 LT |
731 | { |
732 | struct net_device *dev; | |
733 | struct inet6_dev *idev; | |
734 | ||
4acd4945 | 735 | for_each_netdev(net, dev) { |
1da177e4 LT |
736 | idev = __in6_dev_get(dev); |
737 | if (idev) { | |
e186932b PE |
738 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
739 | idev->cnf.forwarding = newf; | |
1da177e4 LT |
740 | if (changed) |
741 | dev_forward_change(idev); | |
742 | } | |
1da177e4 | 743 | } |
1da177e4 | 744 | } |
c8fecf22 | 745 | |
013d97e9 | 746 | static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf) |
c8fecf22 | 747 | { |
bff16c2f | 748 | struct net *net; |
013d97e9 FR |
749 | int old; |
750 | ||
751 | if (!rtnl_trylock()) | |
752 | return restart_syscall(); | |
bff16c2f PE |
753 | |
754 | net = (struct net *)table->extra2; | |
013d97e9 FR |
755 | old = *p; |
756 | *p = newf; | |
b325fddb | 757 | |
013d97e9 | 758 | if (p == &net->ipv6.devconf_dflt->forwarding) { |
f3a1bfb1 ND |
759 | if ((!newf) ^ (!old)) |
760 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
761 | NETCONFA_IFINDEX_DEFAULT, | |
762 | net->ipv6.devconf_dflt); | |
013d97e9 FR |
763 | rtnl_unlock(); |
764 | return 0; | |
88af182e | 765 | } |
c8fecf22 | 766 | |
e186932b | 767 | if (p == &net->ipv6.devconf_all->forwarding) { |
e186932b PE |
768 | net->ipv6.devconf_dflt->forwarding = newf; |
769 | addrconf_forward_change(net, newf); | |
f3a1bfb1 ND |
770 | if ((!newf) ^ (!old)) |
771 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
772 | NETCONFA_IFINDEX_ALL, | |
773 | net->ipv6.devconf_all); | |
013d97e9 | 774 | } else if ((!newf) ^ (!old)) |
c8fecf22 | 775 | dev_forward_change((struct inet6_dev *)table->extra1); |
0187bdfb | 776 | rtnl_unlock(); |
c8fecf22 | 777 | |
013d97e9 | 778 | if (newf) |
7b4da532 | 779 | rt6_purge_dflt_routers(net); |
b325fddb | 780 | return 1; |
c8fecf22 | 781 | } |
35103d11 AG |
782 | |
783 | static void addrconf_linkdown_change(struct net *net, __s32 newf) | |
784 | { | |
785 | struct net_device *dev; | |
786 | struct inet6_dev *idev; | |
787 | ||
788 | for_each_netdev(net, dev) { | |
789 | idev = __in6_dev_get(dev); | |
790 | if (idev) { | |
791 | int changed = (!idev->cnf.ignore_routes_with_linkdown) ^ (!newf); | |
792 | ||
793 | idev->cnf.ignore_routes_with_linkdown = newf; | |
794 | if (changed) | |
795 | inet6_netconf_notify_devconf(dev_net(dev), | |
796 | NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, | |
797 | dev->ifindex, | |
798 | &idev->cnf); | |
799 | } | |
800 | } | |
801 | } | |
802 | ||
803 | static int addrconf_fixup_linkdown(struct ctl_table *table, int *p, int newf) | |
804 | { | |
805 | struct net *net; | |
806 | int old; | |
807 | ||
808 | if (!rtnl_trylock()) | |
809 | return restart_syscall(); | |
810 | ||
811 | net = (struct net *)table->extra2; | |
812 | old = *p; | |
813 | *p = newf; | |
814 | ||
815 | if (p == &net->ipv6.devconf_dflt->ignore_routes_with_linkdown) { | |
816 | if ((!newf) ^ (!old)) | |
817 | inet6_netconf_notify_devconf(net, | |
818 | NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, | |
819 | NETCONFA_IFINDEX_DEFAULT, | |
820 | net->ipv6.devconf_dflt); | |
821 | rtnl_unlock(); | |
822 | return 0; | |
823 | } | |
824 | ||
825 | if (p == &net->ipv6.devconf_all->ignore_routes_with_linkdown) { | |
826 | net->ipv6.devconf_dflt->ignore_routes_with_linkdown = newf; | |
827 | addrconf_linkdown_change(net, newf); | |
828 | if ((!newf) ^ (!old)) | |
829 | inet6_netconf_notify_devconf(net, | |
830 | NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, | |
831 | NETCONFA_IFINDEX_ALL, | |
832 | net->ipv6.devconf_all); | |
833 | } | |
834 | rtnl_unlock(); | |
835 | ||
836 | return 1; | |
837 | } | |
838 | ||
1da177e4 LT |
839 | #endif |
840 | ||
5c578aed | 841 | /* Nobody refers to this ifaddr, destroy it */ |
1da177e4 LT |
842 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) |
843 | { | |
c2e21293 | 844 | WARN_ON(!hlist_unhashed(&ifp->addr_lst)); |
547b792c | 845 | |
1da177e4 | 846 | #ifdef NET_REFCNT_DEBUG |
91df42be | 847 | pr_debug("%s\n", __func__); |
1da177e4 LT |
848 | #endif |
849 | ||
850 | in6_dev_put(ifp->idev); | |
851 | ||
c15b1cca HFS |
852 | if (cancel_delayed_work(&ifp->dad_work)) |
853 | pr_notice("delayed DAD work was pending while freeing ifa=%p\n", | |
854 | ifp); | |
1da177e4 | 855 | |
e9d3e084 | 856 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
f3213831 | 857 | pr_warn("Freeing alive inet6 address %p\n", ifp); |
1da177e4 LT |
858 | return; |
859 | } | |
94e187c0 | 860 | ip6_rt_put(ifp->rt); |
1da177e4 | 861 | |
e5785985 | 862 | kfree_rcu(ifp, rcu); |
1da177e4 LT |
863 | } |
864 | ||
e55ffac6 BH |
865 | static void |
866 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
867 | { | |
502a2ffd | 868 | struct list_head *p; |
8a6ce0c0 | 869 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
870 | |
871 | /* | |
872 | * Each device address list is sorted in order of scope - | |
873 | * global before linklocal. | |
874 | */ | |
502a2ffd | 875 | list_for_each(p, &idev->addr_list) { |
876 | struct inet6_ifaddr *ifa | |
877 | = list_entry(p, struct inet6_ifaddr, if_list); | |
8a6ce0c0 | 878 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
879 | break; |
880 | } | |
881 | ||
b54c9b98 | 882 | list_add_tail(&ifp->if_list, p); |
e55ffac6 BH |
883 | } |
884 | ||
ddbe5032 | 885 | static u32 inet6_addr_hash(const struct in6_addr *addr) |
3eb84f49 | 886 | { |
ddbe5032 | 887 | return hash_32(ipv6_addr_hash(addr), IN6_ADDR_HSIZE_SHIFT); |
3eb84f49 YH |
888 | } |
889 | ||
1da177e4 LT |
890 | /* On success it returns ifp with increased reference count */ |
891 | ||
892 | static struct inet6_ifaddr * | |
3f8f5298 JP |
893 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
894 | const struct in6_addr *peer_addr, int pfxlen, | |
8a226b2c | 895 | int scope, u32 flags, u32 valid_lft, u32 prefered_lft) |
1da177e4 LT |
896 | { |
897 | struct inet6_ifaddr *ifa = NULL; | |
898 | struct rt6_info *rt; | |
3a88a81d | 899 | unsigned int hash; |
1da177e4 | 900 | int err = 0; |
d68b8270 YH |
901 | int addr_type = ipv6_addr_type(addr); |
902 | ||
903 | if (addr_type == IPV6_ADDR_ANY || | |
904 | addr_type & IPV6_ADDR_MULTICAST || | |
905 | (!(idev->dev->flags & IFF_LOOPBACK) && | |
906 | addr_type & IPV6_ADDR_LOOPBACK)) | |
907 | return ERR_PTR(-EADDRNOTAVAIL); | |
1da177e4 | 908 | |
8814c4b5 | 909 | rcu_read_lock_bh(); |
1da177e4 LT |
910 | if (idev->dead) { |
911 | err = -ENODEV; /*XXX*/ | |
912 | goto out2; | |
913 | } | |
914 | ||
56d417b1 | 915 | if (idev->cnf.disable_ipv6) { |
9bdd8d40 BH |
916 | err = -EACCES; |
917 | goto out2; | |
918 | } | |
919 | ||
5c578aed | 920 | spin_lock(&addrconf_hash_lock); |
1da177e4 LT |
921 | |
922 | /* Ignore adding duplicate addresses on an interface */ | |
c346dca1 | 923 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
ba3542e1 | 924 | ADBG("ipv6_add_addr: already assigned\n"); |
1da177e4 LT |
925 | err = -EEXIST; |
926 | goto out; | |
927 | } | |
928 | ||
322f74a4 | 929 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 | 930 | |
63159f29 | 931 | if (!ifa) { |
ba3542e1 | 932 | ADBG("ipv6_add_addr: malloc failed\n"); |
1da177e4 LT |
933 | err = -ENOBUFS; |
934 | goto out; | |
935 | } | |
936 | ||
8f031519 | 937 | rt = addrconf_dst_alloc(idev, addr, false); |
1da177e4 LT |
938 | if (IS_ERR(rt)) { |
939 | err = PTR_ERR(rt); | |
940 | goto out; | |
941 | } | |
942 | ||
bba24896 JP |
943 | neigh_parms_data_state_setall(idev->nd_parms); |
944 | ||
4e3fd7a0 | 945 | ifa->addr = *addr; |
3f8f5298 JP |
946 | if (peer_addr) |
947 | ifa->peer_addr = *peer_addr; | |
1da177e4 LT |
948 | |
949 | spin_lock_init(&ifa->lock); | |
c15b1cca | 950 | INIT_DELAYED_WORK(&ifa->dad_work, addrconf_dad_work); |
c2e21293 | 951 | INIT_HLIST_NODE(&ifa->addr_lst); |
1da177e4 LT |
952 | ifa->scope = scope; |
953 | ifa->prefix_len = pfxlen; | |
954 | ifa->flags = flags | IFA_F_TENTATIVE; | |
8a226b2c JB |
955 | ifa->valid_lft = valid_lft; |
956 | ifa->prefered_lft = prefered_lft; | |
1da177e4 | 957 | ifa->cstamp = ifa->tstamp = jiffies; |
617fe29d | 958 | ifa->tokenized = false; |
1da177e4 | 959 | |
57f5f544 KF |
960 | ifa->rt = rt; |
961 | ||
1da177e4 LT |
962 | ifa->idev = idev; |
963 | in6_dev_hold(idev); | |
964 | /* For caller */ | |
965 | in6_ifa_hold(ifa); | |
966 | ||
967 | /* Add to big hash table */ | |
ddbe5032 | 968 | hash = inet6_addr_hash(addr); |
1da177e4 | 969 | |
5c578aed | 970 | hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]); |
5c578aed | 971 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
972 | |
973 | write_lock(&idev->lock); | |
974 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 975 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 | 976 | |
1da177e4 | 977 | if (ifa->flags&IFA_F_TEMPORARY) { |
372e6c8f | 978 | list_add(&ifa->tmp_list, &idev->tempaddr_list); |
1da177e4 LT |
979 | in6_ifa_hold(ifa); |
980 | } | |
1da177e4 | 981 | |
1da177e4 LT |
982 | in6_ifa_hold(ifa); |
983 | write_unlock(&idev->lock); | |
984 | out2: | |
8814c4b5 | 985 | rcu_read_unlock_bh(); |
1da177e4 | 986 | |
fd92833a | 987 | if (likely(err == 0)) |
f88c91dd | 988 | inet6addr_notifier_call_chain(NETDEV_UP, ifa); |
1da177e4 LT |
989 | else { |
990 | kfree(ifa); | |
991 | ifa = ERR_PTR(err); | |
992 | } | |
993 | ||
994 | return ifa; | |
995 | out: | |
5c578aed | 996 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
997 | goto out2; |
998 | } | |
999 | ||
5b84efec TH |
1000 | enum cleanup_prefix_rt_t { |
1001 | CLEANUP_PREFIX_RT_NOP, /* no cleanup action for prefix route */ | |
1002 | CLEANUP_PREFIX_RT_DEL, /* delete the prefix route */ | |
1003 | CLEANUP_PREFIX_RT_EXPIRE, /* update the lifetime of the prefix route */ | |
1004 | }; | |
1005 | ||
1006 | /* | |
1007 | * Check, whether the prefix for ifp would still need a prefix route | |
1008 | * after deleting ifp. The function returns one of the CLEANUP_PREFIX_RT_* | |
1009 | * constants. | |
1010 | * | |
1011 | * 1) we don't purge prefix if address was not permanent. | |
1012 | * prefix is managed by its own lifetime. | |
1013 | * 2) we also don't purge, if the address was IFA_F_NOPREFIXROUTE. | |
1014 | * 3) if there are no addresses, delete prefix. | |
1015 | * 4) if there are still other permanent address(es), | |
1016 | * corresponding prefix is still permanent. | |
1017 | * 5) if there are still other addresses with IFA_F_NOPREFIXROUTE, | |
1018 | * don't purge the prefix, assume user space is managing it. | |
1019 | * 6) otherwise, update prefix lifetime to the | |
1020 | * longest valid lifetime among the corresponding | |
1021 | * addresses on the device. | |
1022 | * Note: subsequent RA will update lifetime. | |
1023 | **/ | |
1024 | static enum cleanup_prefix_rt_t | |
1025 | check_cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long *expires) | |
1026 | { | |
1027 | struct inet6_ifaddr *ifa; | |
1028 | struct inet6_dev *idev = ifp->idev; | |
1029 | unsigned long lifetime; | |
1030 | enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_DEL; | |
1031 | ||
1032 | *expires = jiffies; | |
1033 | ||
1034 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
1035 | if (ifa == ifp) | |
1036 | continue; | |
1037 | if (!ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
1038 | ifp->prefix_len)) | |
1039 | continue; | |
1040 | if (ifa->flags & (IFA_F_PERMANENT | IFA_F_NOPREFIXROUTE)) | |
1041 | return CLEANUP_PREFIX_RT_NOP; | |
1042 | ||
1043 | action = CLEANUP_PREFIX_RT_EXPIRE; | |
1044 | ||
1045 | spin_lock(&ifa->lock); | |
1046 | ||
1047 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); | |
1048 | /* | |
1049 | * Note: Because this address is | |
1050 | * not permanent, lifetime < | |
1051 | * LONG_MAX / HZ here. | |
1052 | */ | |
1053 | if (time_before(*expires, ifa->tstamp + lifetime * HZ)) | |
1054 | *expires = ifa->tstamp + lifetime * HZ; | |
1055 | spin_unlock(&ifa->lock); | |
1056 | } | |
1057 | ||
1058 | return action; | |
1059 | } | |
1060 | ||
1061 | static void | |
1062 | cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long expires, bool del_rt) | |
1063 | { | |
1064 | struct rt6_info *rt; | |
1065 | ||
1066 | rt = addrconf_get_prefix_route(&ifp->addr, | |
1067 | ifp->prefix_len, | |
1068 | ifp->idev->dev, | |
1069 | 0, RTF_GATEWAY | RTF_DEFAULT); | |
1070 | if (rt) { | |
1071 | if (del_rt) | |
1072 | ip6_del_rt(rt); | |
1073 | else { | |
1074 | if (!(rt->rt6i_flags & RTF_EXPIRES)) | |
1075 | rt6_set_expires(rt, expires); | |
1076 | ip6_rt_put(rt); | |
1077 | } | |
1078 | } | |
1079 | } | |
1080 | ||
1081 | ||
1da177e4 LT |
1082 | /* This function wants to get referenced ifp and releases it before return */ |
1083 | ||
1084 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
1085 | { | |
4c5ff6a6 | 1086 | int state; |
5b84efec TH |
1087 | enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_NOP; |
1088 | unsigned long expires; | |
1da177e4 | 1089 | |
c15b1cca HFS |
1090 | ASSERT_RTNL(); |
1091 | ||
8e8e676d | 1092 | spin_lock_bh(&ifp->lock); |
4c5ff6a6 | 1093 | state = ifp->state; |
e9d3e084 | 1094 | ifp->state = INET6_IFADDR_STATE_DEAD; |
8e8e676d | 1095 | spin_unlock_bh(&ifp->lock); |
4c5ff6a6 HX |
1096 | |
1097 | if (state == INET6_IFADDR_STATE_DEAD) | |
1098 | goto out; | |
1da177e4 | 1099 | |
5c578aed | 1100 | spin_lock_bh(&addrconf_hash_lock); |
1101 | hlist_del_init_rcu(&ifp->addr_lst); | |
5c578aed | 1102 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 | 1103 | |
5b84efec | 1104 | write_lock_bh(&ifp->idev->lock); |
5d9efa7e | 1105 | |
1da177e4 | 1106 | if (ifp->flags&IFA_F_TEMPORARY) { |
372e6c8f | 1107 | list_del(&ifp->tmp_list); |
1108 | if (ifp->ifpub) { | |
1109 | in6_ifa_put(ifp->ifpub); | |
1110 | ifp->ifpub = NULL; | |
1da177e4 | 1111 | } |
372e6c8f | 1112 | __in6_ifa_put(ifp); |
1da177e4 | 1113 | } |
1da177e4 | 1114 | |
5b84efec TH |
1115 | if (ifp->flags & IFA_F_PERMANENT && !(ifp->flags & IFA_F_NOPREFIXROUTE)) |
1116 | action = check_cleanup_prefix_route(ifp, &expires); | |
502a2ffd | 1117 | |
5b84efec TH |
1118 | list_del_init(&ifp->if_list); |
1119 | __in6_ifa_put(ifp); | |
1120 | ||
1121 | write_unlock_bh(&ifp->idev->lock); | |
1da177e4 | 1122 | |
c15b1cca | 1123 | addrconf_del_dad_work(ifp); |
b2238566 | 1124 | |
1da177e4 LT |
1125 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
1126 | ||
f88c91dd | 1127 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifp); |
1da177e4 | 1128 | |
5b84efec TH |
1129 | if (action != CLEANUP_PREFIX_RT_NOP) { |
1130 | cleanup_prefix_route(ifp, expires, | |
1131 | action == CLEANUP_PREFIX_RT_DEL); | |
1da177e4 LT |
1132 | } |
1133 | ||
c3968a85 DW |
1134 | /* clean up prefsrc entries */ |
1135 | rt6_remove_prefsrc(ifp); | |
4c5ff6a6 | 1136 | out: |
1da177e4 LT |
1137 | in6_ifa_put(ifp); |
1138 | } | |
1139 | ||
1da177e4 LT |
1140 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) |
1141 | { | |
1142 | struct inet6_dev *idev = ifp->idev; | |
1143 | struct in6_addr addr, *tmpaddr; | |
76f793e3 | 1144 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age; |
eac55bf9 | 1145 | unsigned long regen_advance; |
1da177e4 LT |
1146 | int tmp_plen; |
1147 | int ret = 0; | |
95c385b4 | 1148 | u32 addr_flags; |
76f793e3 | 1149 | unsigned long now = jiffies; |
1da177e4 | 1150 | |
53bd6749 | 1151 | write_lock_bh(&idev->lock); |
1da177e4 LT |
1152 | if (ift) { |
1153 | spin_lock_bh(&ift->lock); | |
1154 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
1155 | spin_unlock_bh(&ift->lock); | |
1156 | tmpaddr = &addr; | |
1157 | } else { | |
1158 | tmpaddr = NULL; | |
1159 | } | |
1160 | retry: | |
1161 | in6_dev_hold(idev); | |
1162 | if (idev->cnf.use_tempaddr <= 0) { | |
53bd6749 | 1163 | write_unlock_bh(&idev->lock); |
f3213831 | 1164 | pr_info("%s: use_tempaddr is disabled\n", __func__); |
1da177e4 LT |
1165 | in6_dev_put(idev); |
1166 | ret = -1; | |
1167 | goto out; | |
1168 | } | |
1169 | spin_lock_bh(&ifp->lock); | |
1170 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
1171 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
1172 | spin_unlock_bh(&ifp->lock); | |
53bd6749 | 1173 | write_unlock_bh(&idev->lock); |
f3213831 JP |
1174 | pr_warn("%s: regeneration time exceeded - disabled temporary address support\n", |
1175 | __func__); | |
1da177e4 LT |
1176 | in6_dev_put(idev); |
1177 | ret = -1; | |
1178 | goto out; | |
1179 | } | |
1180 | in6_ifa_hold(ifp); | |
1181 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
eb7e0575 | 1182 | __ipv6_try_regen_rndid(idev, tmpaddr); |
1da177e4 | 1183 | memcpy(&addr.s6_addr[8], idev->rndid, 8); |
76f793e3 | 1184 | age = (now - ifp->tstamp) / HZ; |
1da177e4 LT |
1185 | tmp_valid_lft = min_t(__u32, |
1186 | ifp->valid_lft, | |
7a876b0e | 1187 | idev->cnf.temp_valid_lft + age); |
1ab1457c YH |
1188 | tmp_prefered_lft = min_t(__u32, |
1189 | ifp->prefered_lft, | |
7a876b0e | 1190 | idev->cnf.temp_prefered_lft + age - |
784e2710 | 1191 | idev->cnf.max_desync_factor); |
1da177e4 | 1192 | tmp_plen = ifp->prefix_len; |
1da177e4 LT |
1193 | tmp_tstamp = ifp->tstamp; |
1194 | spin_unlock_bh(&ifp->lock); | |
1195 | ||
eac55bf9 | 1196 | regen_advance = idev->cnf.regen_max_retry * |
67ba4152 IM |
1197 | idev->cnf.dad_transmits * |
1198 | NEIGH_VAR(idev->nd_parms, RETRANS_TIME) / HZ; | |
53bd6749 | 1199 | write_unlock_bh(&idev->lock); |
95c385b4 | 1200 | |
eac55bf9 BB |
1201 | /* A temporary address is created only if this calculated Preferred |
1202 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, | |
1203 | * an implementation must not create a temporary address with a zero | |
1204 | * Preferred Lifetime. | |
ecab6701 HK |
1205 | * Use age calculation as in addrconf_verify to avoid unnecessary |
1206 | * temporary addresses being generated. | |
eac55bf9 | 1207 | */ |
ecab6701 HK |
1208 | age = (now - tmp_tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; |
1209 | if (tmp_prefered_lft <= regen_advance + age) { | |
eac55bf9 BB |
1210 | in6_ifa_put(ifp); |
1211 | in6_dev_put(idev); | |
1212 | ret = -1; | |
1213 | goto out; | |
1214 | } | |
1215 | ||
95c385b4 NH |
1216 | addr_flags = IFA_F_TEMPORARY; |
1217 | /* set in addrconf_prefix_rcv() */ | |
1218 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
1219 | addr_flags |= IFA_F_OPTIMISTIC; | |
1220 | ||
4b08a8f1 HFS |
1221 | ift = ipv6_add_addr(idev, &addr, NULL, tmp_plen, |
1222 | ipv6_addr_scope(&addr), addr_flags, | |
1223 | tmp_valid_lft, tmp_prefered_lft); | |
1224 | if (IS_ERR(ift)) { | |
1da177e4 LT |
1225 | in6_ifa_put(ifp); |
1226 | in6_dev_put(idev); | |
f3213831 | 1227 | pr_info("%s: retry temporary address regeneration\n", __func__); |
1da177e4 | 1228 | tmpaddr = &addr; |
53bd6749 | 1229 | write_lock_bh(&idev->lock); |
1da177e4 LT |
1230 | goto retry; |
1231 | } | |
1232 | ||
1233 | spin_lock_bh(&ift->lock); | |
1234 | ift->ifpub = ifp; | |
76f793e3 | 1235 | ift->cstamp = now; |
1da177e4 LT |
1236 | ift->tstamp = tmp_tstamp; |
1237 | spin_unlock_bh(&ift->lock); | |
1238 | ||
cf22f9a2 | 1239 | addrconf_dad_start(ift); |
1da177e4 LT |
1240 | in6_ifa_put(ift); |
1241 | in6_dev_put(idev); | |
1242 | out: | |
1243 | return ret; | |
1244 | } | |
1da177e4 LT |
1245 | |
1246 | /* | |
072047e4 | 1247 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 1248 | */ |
a9b05723 YH |
1249 | enum { |
1250 | IPV6_SADDR_RULE_INIT = 0, | |
1251 | IPV6_SADDR_RULE_LOCAL, | |
1252 | IPV6_SADDR_RULE_SCOPE, | |
1253 | IPV6_SADDR_RULE_PREFERRED, | |
1254 | #ifdef CONFIG_IPV6_MIP6 | |
1255 | IPV6_SADDR_RULE_HOA, | |
1256 | #endif | |
1257 | IPV6_SADDR_RULE_OIF, | |
1258 | IPV6_SADDR_RULE_LABEL, | |
a9b05723 | 1259 | IPV6_SADDR_RULE_PRIVACY, |
a9b05723 YH |
1260 | IPV6_SADDR_RULE_ORCHID, |
1261 | IPV6_SADDR_RULE_PREFIX, | |
7fd2561e EK |
1262 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
1263 | IPV6_SADDR_RULE_NOT_OPTIMISTIC, | |
1264 | #endif | |
a9b05723 YH |
1265 | IPV6_SADDR_RULE_MAX |
1266 | }; | |
1267 | ||
072047e4 | 1268 | struct ipv6_saddr_score { |
a9b05723 YH |
1269 | int rule; |
1270 | int addr_type; | |
1271 | struct inet6_ifaddr *ifa; | |
1272 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); | |
1273 | int scopedist; | |
1274 | int matchlen; | |
072047e4 YH |
1275 | }; |
1276 | ||
a9b05723 | 1277 | struct ipv6_saddr_dst { |
9acd9f3a | 1278 | const struct in6_addr *addr; |
a9b05723 YH |
1279 | int ifindex; |
1280 | int scope; | |
1281 | int label; | |
7cbca67c | 1282 | unsigned int prefs; |
a9b05723 | 1283 | }; |
072047e4 | 1284 | |
b6f99a21 | 1285 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 1286 | { |
45bb0060 | 1287 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK)) |
072047e4 YH |
1288 | return 1; |
1289 | return 0; | |
1da177e4 LT |
1290 | } |
1291 | ||
7fd2561e EK |
1292 | static inline bool ipv6_use_optimistic_addr(struct inet6_dev *idev) |
1293 | { | |
1294 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
1295 | return idev && idev->cnf.optimistic_dad && idev->cnf.use_optimistic; | |
1296 | #else | |
1297 | return false; | |
1298 | #endif | |
1299 | } | |
1300 | ||
3de23255 BT |
1301 | static int ipv6_get_saddr_eval(struct net *net, |
1302 | struct ipv6_saddr_score *score, | |
a9b05723 YH |
1303 | struct ipv6_saddr_dst *dst, |
1304 | int i) | |
1305 | { | |
1306 | int ret; | |
1307 | ||
1308 | if (i <= score->rule) { | |
1309 | switch (i) { | |
1310 | case IPV6_SADDR_RULE_SCOPE: | |
1311 | ret = score->scopedist; | |
1312 | break; | |
1313 | case IPV6_SADDR_RULE_PREFIX: | |
1314 | ret = score->matchlen; | |
1315 | break; | |
1316 | default: | |
1317 | ret = !!test_bit(i, score->scorebits); | |
1318 | } | |
1319 | goto out; | |
1320 | } | |
1321 | ||
1322 | switch (i) { | |
1323 | case IPV6_SADDR_RULE_INIT: | |
1324 | /* Rule 0: remember if hiscore is not ready yet */ | |
1325 | ret = !!score->ifa; | |
1326 | break; | |
1327 | case IPV6_SADDR_RULE_LOCAL: | |
1328 | /* Rule 1: Prefer same address */ | |
1329 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); | |
1330 | break; | |
1331 | case IPV6_SADDR_RULE_SCOPE: | |
1332 | /* Rule 2: Prefer appropriate scope | |
1333 | * | |
1334 | * ret | |
1335 | * ^ | |
1336 | * -1 | d 15 | |
1337 | * ---+--+-+---> scope | |
1338 | * | | |
1339 | * | d is scope of the destination. | |
1340 | * B-d | \ | |
1341 | * | \ <- smaller scope is better if | |
db9c7c39 | 1342 | * B-15 | \ if scope is enough for destination. |
a9b05723 YH |
1343 | * | ret = B - scope (-1 <= scope >= d <= 15). |
1344 | * d-C-1 | / | |
1345 | * |/ <- greater is better | |
1346 | * -C / if scope is not enough for destination. | |
1347 | * /| ret = scope - C (-1 <= d < scope <= 15). | |
1348 | * | |
1349 | * d - C - 1 < B -15 (for all -1 <= d <= 15). | |
1350 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. | |
1351 | * Assume B = 0 and we get C > 29. | |
1352 | */ | |
1353 | ret = __ipv6_addr_src_scope(score->addr_type); | |
1354 | if (ret >= dst->scope) | |
1355 | ret = -ret; | |
1356 | else | |
1357 | ret -= 128; /* 30 is enough */ | |
1358 | score->scopedist = ret; | |
1359 | break; | |
1360 | case IPV6_SADDR_RULE_PREFERRED: | |
7fd2561e | 1361 | { |
a9b05723 | 1362 | /* Rule 3: Avoid deprecated and optimistic addresses */ |
7fd2561e EK |
1363 | u8 avoid = IFA_F_DEPRECATED; |
1364 | ||
1365 | if (!ipv6_use_optimistic_addr(score->ifa->idev)) | |
1366 | avoid |= IFA_F_OPTIMISTIC; | |
a9b05723 | 1367 | ret = ipv6_saddr_preferred(score->addr_type) || |
7fd2561e | 1368 | !(score->ifa->flags & avoid); |
a9b05723 | 1369 | break; |
7fd2561e | 1370 | } |
a9b05723 YH |
1371 | #ifdef CONFIG_IPV6_MIP6 |
1372 | case IPV6_SADDR_RULE_HOA: | |
7cbca67c | 1373 | { |
a9b05723 | 1374 | /* Rule 4: Prefer home address */ |
7cbca67c YH |
1375 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
1376 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; | |
a9b05723 | 1377 | break; |
7cbca67c | 1378 | } |
a9b05723 YH |
1379 | #endif |
1380 | case IPV6_SADDR_RULE_OIF: | |
1381 | /* Rule 5: Prefer outgoing interface */ | |
1382 | ret = (!dst->ifindex || | |
1383 | dst->ifindex == score->ifa->idev->dev->ifindex); | |
1384 | break; | |
1385 | case IPV6_SADDR_RULE_LABEL: | |
1386 | /* Rule 6: Prefer matching label */ | |
3de23255 BT |
1387 | ret = ipv6_addr_label(net, |
1388 | &score->ifa->addr, score->addr_type, | |
a9b05723 YH |
1389 | score->ifa->idev->dev->ifindex) == dst->label; |
1390 | break; | |
a9b05723 | 1391 | case IPV6_SADDR_RULE_PRIVACY: |
7cbca67c | 1392 | { |
a9b05723 | 1393 | /* Rule 7: Prefer public address |
25985edc | 1394 | * Note: prefer temporary address if use_tempaddr >= 2 |
a9b05723 | 1395 | */ |
7cbca67c YH |
1396 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
1397 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : | |
1398 | score->ifa->idev->cnf.use_tempaddr >= 2; | |
1399 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; | |
a9b05723 | 1400 | break; |
7cbca67c | 1401 | } |
a9b05723 YH |
1402 | case IPV6_SADDR_RULE_ORCHID: |
1403 | /* Rule 8-: Prefer ORCHID vs ORCHID or | |
1404 | * non-ORCHID vs non-ORCHID | |
1405 | */ | |
1406 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ | |
1407 | ipv6_addr_orchid(dst->addr)); | |
1408 | break; | |
1409 | case IPV6_SADDR_RULE_PREFIX: | |
1410 | /* Rule 8: Use longest matching prefix */ | |
91b4b04f YH |
1411 | ret = ipv6_addr_diff(&score->ifa->addr, dst->addr); |
1412 | if (ret > score->ifa->prefix_len) | |
1413 | ret = score->ifa->prefix_len; | |
1414 | score->matchlen = ret; | |
a9b05723 | 1415 | break; |
7fd2561e EK |
1416 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
1417 | case IPV6_SADDR_RULE_NOT_OPTIMISTIC: | |
1418 | /* Optimistic addresses still have lower precedence than other | |
1419 | * preferred addresses. | |
1420 | */ | |
1421 | ret = !(score->ifa->flags & IFA_F_OPTIMISTIC); | |
1422 | break; | |
1423 | #endif | |
a9b05723 YH |
1424 | default: |
1425 | ret = 0; | |
1426 | } | |
1427 | ||
1428 | if (ret) | |
1429 | __set_bit(i, score->scorebits); | |
1430 | score->rule = i; | |
1431 | out: | |
1432 | return ret; | |
1433 | } | |
1434 | ||
c0b8da1e YH |
1435 | static int __ipv6_dev_get_saddr(struct net *net, |
1436 | struct ipv6_saddr_dst *dst, | |
c0b8da1e YH |
1437 | struct inet6_dev *idev, |
1438 | struct ipv6_saddr_score *scores, | |
1439 | int hiscore_idx) | |
9131f3de | 1440 | { |
c0b8da1e | 1441 | struct ipv6_saddr_score *score = &scores[1 - hiscore_idx], *hiscore = &scores[hiscore_idx]; |
9131f3de YH |
1442 | |
1443 | read_lock_bh(&idev->lock); | |
1444 | list_for_each_entry(score->ifa, &idev->addr_list, if_list) { | |
1445 | int i; | |
1446 | ||
1447 | /* | |
1448 | * - Tentative Address (RFC2462 section 5.4) | |
1449 | * - A tentative address is not considered | |
1450 | * "assigned to an interface" in the traditional | |
1451 | * sense, unless it is also flagged as optimistic. | |
1452 | * - Candidate Source Address (section 4) | |
1453 | * - In any case, anycast addresses, multicast | |
1454 | * addresses, and the unspecified address MUST | |
1455 | * NOT be included in a candidate set. | |
1456 | */ | |
1457 | if ((score->ifa->flags & IFA_F_TENTATIVE) && | |
1458 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) | |
1459 | continue; | |
1460 | ||
1461 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); | |
1462 | ||
1463 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || | |
1464 | score->addr_type & IPV6_ADDR_MULTICAST)) { | |
1465 | net_dbg_ratelimited("ADDRCONF: unspecified / multicast address assigned as unicast address on %s", | |
1466 | idev->dev->name); | |
1467 | continue; | |
1468 | } | |
1469 | ||
1470 | score->rule = -1; | |
1471 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); | |
1472 | ||
1473 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { | |
1474 | int minihiscore, miniscore; | |
1475 | ||
1476 | minihiscore = ipv6_get_saddr_eval(net, hiscore, dst, i); | |
1477 | miniscore = ipv6_get_saddr_eval(net, score, dst, i); | |
1478 | ||
1479 | if (minihiscore > miniscore) { | |
1480 | if (i == IPV6_SADDR_RULE_SCOPE && | |
1481 | score->scopedist > 0) { | |
1482 | /* | |
1483 | * special case: | |
1484 | * each remaining entry | |
1485 | * has too small (not enough) | |
1486 | * scope, because ifa entries | |
1487 | * are sorted by their scope | |
1488 | * values. | |
1489 | */ | |
1490 | goto out; | |
1491 | } | |
1492 | break; | |
1493 | } else if (minihiscore < miniscore) { | |
1494 | if (hiscore->ifa) | |
1495 | in6_ifa_put(hiscore->ifa); | |
1496 | ||
1497 | in6_ifa_hold(score->ifa); | |
1498 | ||
1499 | swap(hiscore, score); | |
c0b8da1e | 1500 | hiscore_idx = 1 - hiscore_idx; |
9131f3de YH |
1501 | |
1502 | /* restore our iterator */ | |
1503 | score->ifa = hiscore->ifa; | |
1504 | ||
1505 | break; | |
1506 | } | |
1507 | } | |
1508 | } | |
1509 | out: | |
1510 | read_unlock_bh(&idev->lock); | |
c0b8da1e | 1511 | return hiscore_idx; |
9131f3de YH |
1512 | } |
1513 | ||
b3f644fc | 1514 | int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev, |
9acd9f3a | 1515 | const struct in6_addr *daddr, unsigned int prefs, |
7cbca67c | 1516 | struct in6_addr *saddr) |
1da177e4 | 1517 | { |
c0b8da1e | 1518 | struct ipv6_saddr_score scores[2], *hiscore; |
a9b05723 | 1519 | struct ipv6_saddr_dst dst; |
9131f3de | 1520 | struct inet6_dev *idev; |
072047e4 | 1521 | struct net_device *dev; |
a9b05723 | 1522 | int dst_type; |
9131f3de | 1523 | bool use_oif_addr = false; |
c0b8da1e | 1524 | int hiscore_idx = 0; |
1da177e4 | 1525 | |
a9b05723 YH |
1526 | dst_type = __ipv6_addr_type(daddr); |
1527 | dst.addr = daddr; | |
1528 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; | |
1529 | dst.scope = __ipv6_addr_src_scope(dst_type); | |
3de23255 | 1530 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
7cbca67c | 1531 | dst.prefs = prefs; |
a9b05723 | 1532 | |
c0b8da1e YH |
1533 | scores[hiscore_idx].rule = -1; |
1534 | scores[hiscore_idx].ifa = NULL; | |
1da177e4 | 1535 | |
8814c4b5 | 1536 | rcu_read_lock(); |
1da177e4 | 1537 | |
9131f3de YH |
1538 | /* Candidate Source Address (section 4) |
1539 | * - multicast and link-local destination address, | |
1540 | * the set of candidate source address MUST only | |
1541 | * include addresses assigned to interfaces | |
1542 | * belonging to the same link as the outgoing | |
1543 | * interface. | |
1544 | * (- For site-local destination addresses, the | |
1545 | * set of candidate source addresses MUST only | |
1546 | * include addresses assigned to interfaces | |
1547 | * belonging to the same site as the outgoing | |
1548 | * interface.) | |
3985e8a3 EK |
1549 | * - "It is RECOMMENDED that the candidate source addresses |
1550 | * be the set of unicast addresses assigned to the | |
1551 | * interface that will be used to send to the destination | |
1552 | * (the 'outgoing' interface)." (RFC 6724) | |
9131f3de YH |
1553 | */ |
1554 | if (dst_dev) { | |
3985e8a3 | 1555 | idev = __in6_dev_get(dst_dev); |
9131f3de | 1556 | if ((dst_type & IPV6_ADDR_MULTICAST) || |
3985e8a3 EK |
1557 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL || |
1558 | (idev && idev->cnf.use_oif_addrs_only)) { | |
9131f3de YH |
1559 | use_oif_addr = true; |
1560 | } | |
1561 | } | |
a9b05723 | 1562 | |
9131f3de | 1563 | if (use_oif_addr) { |
c0b8da1e | 1564 | if (idev) |
c15df306 | 1565 | hiscore_idx = __ipv6_dev_get_saddr(net, &dst, idev, scores, hiscore_idx); |
9131f3de YH |
1566 | } else { |
1567 | for_each_netdev_rcu(net, dev) { | |
1568 | idev = __in6_dev_get(dev); | |
1569 | if (!idev) | |
072047e4 | 1570 | continue; |
c15df306 | 1571 | hiscore_idx = __ipv6_dev_get_saddr(net, &dst, idev, scores, hiscore_idx); |
1da177e4 LT |
1572 | } |
1573 | } | |
8814c4b5 | 1574 | rcu_read_unlock(); |
1da177e4 | 1575 | |
c0b8da1e | 1576 | hiscore = &scores[hiscore_idx]; |
a9b05723 | 1577 | if (!hiscore->ifa) |
072047e4 | 1578 | return -EADDRNOTAVAIL; |
1ab1457c | 1579 | |
4e3fd7a0 | 1580 | *saddr = hiscore->ifa->addr; |
a9b05723 | 1581 | in6_ifa_put(hiscore->ifa); |
072047e4 | 1582 | return 0; |
1da177e4 | 1583 | } |
5e5f3f0f | 1584 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
1da177e4 | 1585 | |
8965779d | 1586 | int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, |
479840ff | 1587 | u32 banned_flags) |
b7b1bfce HFS |
1588 | { |
1589 | struct inet6_ifaddr *ifp; | |
1590 | int err = -EADDRNOTAVAIL; | |
1591 | ||
602582ca HFS |
1592 | list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) { |
1593 | if (ifp->scope > IFA_LINK) | |
1594 | break; | |
b7b1bfce HFS |
1595 | if (ifp->scope == IFA_LINK && |
1596 | !(ifp->flags & banned_flags)) { | |
1597 | *addr = ifp->addr; | |
1598 | err = 0; | |
1599 | break; | |
1600 | } | |
1601 | } | |
1602 | return err; | |
1603 | } | |
1604 | ||
95c385b4 | 1605 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
479840ff | 1606 | u32 banned_flags) |
1da177e4 LT |
1607 | { |
1608 | struct inet6_dev *idev; | |
1609 | int err = -EADDRNOTAVAIL; | |
1610 | ||
8814c4b5 | 1611 | rcu_read_lock(); |
e21e8467 SH |
1612 | idev = __in6_dev_get(dev); |
1613 | if (idev) { | |
1da177e4 | 1614 | read_lock_bh(&idev->lock); |
b7b1bfce | 1615 | err = __ipv6_get_lladdr(idev, addr, banned_flags); |
1da177e4 LT |
1616 | read_unlock_bh(&idev->lock); |
1617 | } | |
8814c4b5 | 1618 | rcu_read_unlock(); |
1da177e4 LT |
1619 | return err; |
1620 | } | |
1621 | ||
1622 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1623 | { | |
1624 | int cnt = 0; | |
1625 | struct inet6_ifaddr *ifp; | |
1626 | ||
1627 | read_lock_bh(&idev->lock); | |
502a2ffd | 1628 | list_for_each_entry(ifp, &idev->addr_list, if_list) |
1da177e4 LT |
1629 | cnt++; |
1630 | read_unlock_bh(&idev->lock); | |
1631 | return cnt; | |
1632 | } | |
1633 | ||
b71d1d42 | 1634 | int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
2a7851bf | 1635 | const struct net_device *dev, int strict) |
c58da4c6 EK |
1636 | { |
1637 | return ipv6_chk_addr_and_flags(net, addr, dev, strict, IFA_F_TENTATIVE); | |
1638 | } | |
1639 | EXPORT_SYMBOL(ipv6_chk_addr); | |
1640 | ||
1641 | int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr, | |
1642 | const struct net_device *dev, int strict, | |
1643 | u32 banned_flags) | |
1da177e4 | 1644 | { |
eedf042a | 1645 | struct inet6_ifaddr *ifp; |
ddbe5032 | 1646 | unsigned int hash = inet6_addr_hash(addr); |
c58da4c6 | 1647 | u32 ifp_flags; |
1da177e4 | 1648 | |
5c578aed | 1649 | rcu_read_lock_bh(); |
b67bfe0d | 1650 | hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1651 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
bfeade08 | 1652 | continue; |
c58da4c6 EK |
1653 | /* Decouple optimistic from tentative for evaluation here. |
1654 | * Ban optimistic addresses explicitly, when required. | |
1655 | */ | |
1656 | ifp_flags = (ifp->flags&IFA_F_OPTIMISTIC) | |
1657 | ? (ifp->flags&~IFA_F_TENTATIVE) | |
1658 | : ifp->flags; | |
1da177e4 | 1659 | if (ipv6_addr_equal(&ifp->addr, addr) && |
c58da4c6 | 1660 | !(ifp_flags&banned_flags) && |
63159f29 | 1661 | (!dev || ifp->idev->dev == dev || |
eedf042a SH |
1662 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) { |
1663 | rcu_read_unlock_bh(); | |
1664 | return 1; | |
1da177e4 LT |
1665 | } |
1666 | } | |
5c578aed | 1667 | |
eedf042a SH |
1668 | rcu_read_unlock_bh(); |
1669 | return 0; | |
1da177e4 | 1670 | } |
c58da4c6 | 1671 | EXPORT_SYMBOL(ipv6_chk_addr_and_flags); |
7159039a | 1672 | |
3e81c6da DM |
1673 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
1674 | struct net_device *dev) | |
1da177e4 | 1675 | { |
ddbe5032 | 1676 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 1677 | struct inet6_ifaddr *ifp; |
1da177e4 | 1678 | |
b67bfe0d | 1679 | hlist_for_each_entry(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1680 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
06bfe655 | 1681 | continue; |
1da177e4 | 1682 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
63159f29 | 1683 | if (!dev || ifp->idev->dev == dev) |
3e81c6da | 1684 | return true; |
1da177e4 LT |
1685 | } |
1686 | } | |
3e81c6da | 1687 | return false; |
1da177e4 LT |
1688 | } |
1689 | ||
7df37ff3 CB |
1690 | /* Compares an address/prefix_len with addresses on device @dev. |
1691 | * If one is found it returns true. | |
1692 | */ | |
1693 | bool ipv6_chk_custom_prefix(const struct in6_addr *addr, | |
1694 | const unsigned int prefix_len, struct net_device *dev) | |
1695 | { | |
1696 | struct inet6_dev *idev; | |
1697 | struct inet6_ifaddr *ifa; | |
1698 | bool ret = false; | |
1699 | ||
1700 | rcu_read_lock(); | |
1701 | idev = __in6_dev_get(dev); | |
1702 | if (idev) { | |
1703 | read_lock_bh(&idev->lock); | |
1704 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
1705 | ret = ipv6_prefix_equal(addr, &ifa->addr, prefix_len); | |
1706 | if (ret) | |
1707 | break; | |
1708 | } | |
1709 | read_unlock_bh(&idev->lock); | |
1710 | } | |
1711 | rcu_read_unlock(); | |
1712 | ||
1713 | return ret; | |
1714 | } | |
1715 | EXPORT_SYMBOL(ipv6_chk_custom_prefix); | |
1716 | ||
b71d1d42 | 1717 | int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev) |
52eeeb84 YH |
1718 | { |
1719 | struct inet6_dev *idev; | |
1720 | struct inet6_ifaddr *ifa; | |
1721 | int onlink; | |
1722 | ||
1723 | onlink = 0; | |
1724 | rcu_read_lock(); | |
1725 | idev = __in6_dev_get(dev); | |
1726 | if (idev) { | |
1727 | read_lock_bh(&idev->lock); | |
502a2ffd | 1728 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
52eeeb84 YH |
1729 | onlink = ipv6_prefix_equal(addr, &ifa->addr, |
1730 | ifa->prefix_len); | |
1731 | if (onlink) | |
1732 | break; | |
1733 | } | |
1734 | read_unlock_bh(&idev->lock); | |
1735 | } | |
1736 | rcu_read_unlock(); | |
1737 | return onlink; | |
1738 | } | |
52eeeb84 YH |
1739 | EXPORT_SYMBOL(ipv6_chk_prefix); |
1740 | ||
9acd9f3a | 1741 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, |
1cab3da6 | 1742 | struct net_device *dev, int strict) |
1da177e4 | 1743 | { |
b79d1d54 | 1744 | struct inet6_ifaddr *ifp, *result = NULL; |
ddbe5032 | 1745 | unsigned int hash = inet6_addr_hash(addr); |
1da177e4 | 1746 | |
5c578aed | 1747 | rcu_read_lock_bh(); |
b67bfe0d | 1748 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1749 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
1cab3da6 | 1750 | continue; |
1da177e4 | 1751 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
63159f29 | 1752 | if (!dev || ifp->idev->dev == dev || |
1da177e4 | 1753 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { |
b79d1d54 | 1754 | result = ifp; |
1da177e4 LT |
1755 | in6_ifa_hold(ifp); |
1756 | break; | |
1757 | } | |
1758 | } | |
1759 | } | |
5c578aed | 1760 | rcu_read_unlock_bh(); |
1da177e4 | 1761 | |
b79d1d54 | 1762 | return result; |
1da177e4 LT |
1763 | } |
1764 | ||
1da177e4 LT |
1765 | /* Gets referenced address, destroys ifaddr */ |
1766 | ||
cc411d0b | 1767 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) |
1da177e4 | 1768 | { |
1da177e4 LT |
1769 | if (ifp->flags&IFA_F_PERMANENT) { |
1770 | spin_lock_bh(&ifp->lock); | |
c15b1cca | 1771 | addrconf_del_dad_work(ifp); |
1da177e4 | 1772 | ifp->flags |= IFA_F_TENTATIVE; |
cc411d0b BH |
1773 | if (dad_failed) |
1774 | ifp->flags |= IFA_F_DADFAILED; | |
1da177e4 | 1775 | spin_unlock_bh(&ifp->lock); |
e2577a06 HX |
1776 | if (dad_failed) |
1777 | ipv6_ifa_notify(0, ifp); | |
1da177e4 | 1778 | in6_ifa_put(ifp); |
1da177e4 LT |
1779 | } else if (ifp->flags&IFA_F_TEMPORARY) { |
1780 | struct inet6_ifaddr *ifpub; | |
1781 | spin_lock_bh(&ifp->lock); | |
1782 | ifpub = ifp->ifpub; | |
1783 | if (ifpub) { | |
1784 | in6_ifa_hold(ifpub); | |
1785 | spin_unlock_bh(&ifp->lock); | |
1786 | ipv6_create_tempaddr(ifpub, ifp); | |
1787 | in6_ifa_put(ifpub); | |
1788 | } else { | |
1789 | spin_unlock_bh(&ifp->lock); | |
1790 | } | |
1791 | ipv6_del_addr(ifp); | |
c15b1cca | 1792 | } else { |
1da177e4 | 1793 | ipv6_del_addr(ifp); |
c15b1cca | 1794 | } |
1da177e4 LT |
1795 | } |
1796 | ||
f2344a13 HX |
1797 | static int addrconf_dad_end(struct inet6_ifaddr *ifp) |
1798 | { | |
1799 | int err = -ENOENT; | |
1800 | ||
8e8e676d | 1801 | spin_lock_bh(&ifp->lock); |
f2344a13 HX |
1802 | if (ifp->state == INET6_IFADDR_STATE_DAD) { |
1803 | ifp->state = INET6_IFADDR_STATE_POSTDAD; | |
1804 | err = 0; | |
1805 | } | |
8e8e676d | 1806 | spin_unlock_bh(&ifp->lock); |
f2344a13 HX |
1807 | |
1808 | return err; | |
1809 | } | |
1810 | ||
3c21edbd YH |
1811 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1812 | { | |
5f40ef77 | 1813 | struct in6_addr addr; |
1b34be74 | 1814 | struct inet6_dev *idev = ifp->idev; |
1855b7c3 | 1815 | struct net *net = dev_net(ifp->idev->dev); |
9bdd8d40 | 1816 | |
853dc2e0 UB |
1817 | if (addrconf_dad_end(ifp)) { |
1818 | in6_ifa_put(ifp); | |
f2344a13 | 1819 | return; |
853dc2e0 | 1820 | } |
f2344a13 | 1821 | |
e87cc472 JP |
1822 | net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n", |
1823 | ifp->idev->dev->name, &ifp->addr); | |
9bdd8d40 | 1824 | |
5f40ef77 HFS |
1825 | spin_lock_bh(&ifp->lock); |
1826 | ||
1827 | if (ifp->flags & IFA_F_STABLE_PRIVACY) { | |
1828 | int scope = ifp->scope; | |
1829 | u32 flags = ifp->flags; | |
1830 | struct in6_addr new_addr; | |
1831 | struct inet6_ifaddr *ifp2; | |
1832 | u32 valid_lft, preferred_lft; | |
1833 | int pfxlen = ifp->prefix_len; | |
5f40ef77 HFS |
1834 | int retries = ifp->stable_privacy_retry + 1; |
1835 | ||
1855b7c3 | 1836 | if (retries > net->ipv6.sysctl.idgen_retries) { |
5f40ef77 HFS |
1837 | net_info_ratelimited("%s: privacy stable address generation failed because of DAD conflicts!\n", |
1838 | ifp->idev->dev->name); | |
1839 | goto errdad; | |
1840 | } | |
1841 | ||
1842 | new_addr = ifp->addr; | |
1843 | if (ipv6_generate_stable_address(&new_addr, retries, | |
1844 | idev)) | |
1845 | goto errdad; | |
1846 | ||
1847 | valid_lft = ifp->valid_lft; | |
1848 | preferred_lft = ifp->prefered_lft; | |
1849 | ||
1850 | spin_unlock_bh(&ifp->lock); | |
1b34be74 | 1851 | |
5f40ef77 HFS |
1852 | if (idev->cnf.max_addresses && |
1853 | ipv6_count_addresses(idev) >= | |
1854 | idev->cnf.max_addresses) | |
1855 | goto lock_errdad; | |
1856 | ||
1857 | net_info_ratelimited("%s: generating new stable privacy address because of DAD conflict\n", | |
1858 | ifp->idev->dev->name); | |
1859 | ||
1860 | ifp2 = ipv6_add_addr(idev, &new_addr, NULL, pfxlen, | |
1861 | scope, flags, valid_lft, | |
1862 | preferred_lft); | |
1863 | if (IS_ERR(ifp2)) | |
1864 | goto lock_errdad; | |
1865 | ||
1866 | spin_lock_bh(&ifp2->lock); | |
1867 | ifp2->stable_privacy_retry = retries; | |
1868 | ifp2->state = INET6_IFADDR_STATE_PREDAD; | |
1869 | spin_unlock_bh(&ifp2->lock); | |
1870 | ||
1855b7c3 | 1871 | addrconf_mod_dad_work(ifp2, net->ipv6.sysctl.idgen_delay); |
5f40ef77 HFS |
1872 | in6_ifa_put(ifp2); |
1873 | lock_errdad: | |
1874 | spin_lock_bh(&ifp->lock); | |
1875 | } else if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) { | |
1b34be74 YH |
1876 | addr.s6_addr32[0] = htonl(0xfe800000); |
1877 | addr.s6_addr32[1] = 0; | |
1878 | ||
1879 | if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && | |
1880 | ipv6_addr_equal(&ifp->addr, &addr)) { | |
1881 | /* DAD failed for link-local based on MAC address */ | |
1882 | idev->cnf.disable_ipv6 = 1; | |
9bdd8d40 | 1883 | |
f3213831 | 1884 | pr_info("%s: IPv6 being disabled!\n", |
9bdd8d40 | 1885 | ifp->idev->dev->name); |
1b34be74 YH |
1886 | } |
1887 | } | |
1888 | ||
5f40ef77 | 1889 | errdad: |
c15b1cca HFS |
1890 | /* transition from _POSTDAD to _ERRDAD */ |
1891 | ifp->state = INET6_IFADDR_STATE_ERRDAD; | |
8e8e676d | 1892 | spin_unlock_bh(&ifp->lock); |
c15b1cca HFS |
1893 | |
1894 | addrconf_mod_dad_work(ifp, 0); | |
3c21edbd | 1895 | } |
1da177e4 | 1896 | |
a9ed4a29 SD |
1897 | /* Join to solicited addr multicast group. |
1898 | * caller must hold RTNL */ | |
b71d1d42 | 1899 | void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 LT |
1900 | { |
1901 | struct in6_addr maddr; | |
1902 | ||
1903 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1904 | return; | |
1905 | ||
1906 | addrconf_addr_solict_mult(addr, &maddr); | |
1907 | ipv6_dev_mc_inc(dev, &maddr); | |
1908 | } | |
1909 | ||
a9ed4a29 | 1910 | /* caller must hold RTNL */ |
b71d1d42 | 1911 | void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
1912 | { |
1913 | struct in6_addr maddr; | |
1914 | ||
1915 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1916 | return; | |
1917 | ||
1918 | addrconf_addr_solict_mult(addr, &maddr); | |
1919 | __ipv6_dev_mc_dec(idev, &maddr); | |
1920 | } | |
1921 | ||
a9ed4a29 | 1922 | /* caller must hold RTNL */ |
20380731 | 1923 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1924 | { |
1925 | struct in6_addr addr; | |
c15b1cca | 1926 | |
88ad3149 | 1927 | if (ifp->prefix_len >= 127) /* RFC 6164 */ |
2bda8a0c | 1928 | return; |
1da177e4 LT |
1929 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
1930 | if (ipv6_addr_any(&addr)) | |
1931 | return; | |
013b4d90 | 1932 | __ipv6_dev_ac_inc(ifp->idev, &addr); |
1da177e4 LT |
1933 | } |
1934 | ||
a9ed4a29 | 1935 | /* caller must hold RTNL */ |
20380731 | 1936 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1937 | { |
1938 | struct in6_addr addr; | |
c15b1cca | 1939 | |
88ad3149 | 1940 | if (ifp->prefix_len >= 127) /* RFC 6164 */ |
32019e65 | 1941 | return; |
1da177e4 LT |
1942 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
1943 | if (ipv6_addr_any(&addr)) | |
1944 | return; | |
1945 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1946 | } | |
1947 | ||
06a4c1c5 | 1948 | static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev) |
1949 | { | |
1950 | if (dev->addr_len != IEEE802154_ADDR_LEN) | |
1951 | return -1; | |
1952 | memcpy(eui, dev->dev_addr, 8); | |
5e98a36e | 1953 | eui[0] ^= 2; |
06a4c1c5 | 1954 | return 0; |
1955 | } | |
1956 | ||
cb6bf355 YH |
1957 | static int addrconf_ifid_ieee1394(u8 *eui, struct net_device *dev) |
1958 | { | |
1959 | union fwnet_hwaddr *ha; | |
1960 | ||
1961 | if (dev->addr_len != FWNET_ALEN) | |
1962 | return -1; | |
1963 | ||
1964 | ha = (union fwnet_hwaddr *)dev->dev_addr; | |
1965 | ||
1966 | memcpy(eui, &ha->uc.uniq_id, sizeof(ha->uc.uniq_id)); | |
1967 | eui[0] ^= 2; | |
1968 | return 0; | |
1969 | } | |
1970 | ||
073a8e0e YH |
1971 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) |
1972 | { | |
1973 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1974 | if (dev->addr_len != ARCNET_ALEN) | |
1975 | return -1; | |
1976 | memset(eui, 0, 7); | |
8e5e8f30 | 1977 | eui[7] = *(u8 *)dev->dev_addr; |
073a8e0e YH |
1978 | return 0; |
1979 | } | |
1980 | ||
1981 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1982 | { | |
1983 | if (dev->addr_len != INFINIBAND_ALEN) | |
1984 | return -1; | |
1985 | memcpy(eui, dev->dev_addr + 12, 8); | |
1986 | eui[0] |= 2; | |
1987 | return 0; | |
1988 | } | |
1989 | ||
c61393ea | 1990 | static int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
dfd982ba | 1991 | { |
9af28511 SH |
1992 | if (addr == 0) |
1993 | return -1; | |
dfd982ba YH |
1994 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || |
1995 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || | |
1996 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || | |
1997 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || | |
1998 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || | |
1999 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; | |
2000 | eui[1] = 0; | |
2001 | eui[2] = 0x5E; | |
2002 | eui[3] = 0xFE; | |
2003 | memcpy(eui + 4, &addr, 4); | |
2004 | return 0; | |
2005 | } | |
dfd982ba YH |
2006 | |
2007 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) | |
2008 | { | |
2009 | if (dev->priv_flags & IFF_ISATAP) | |
2010 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
2011 | return -1; | |
2012 | } | |
2013 | ||
aee80b54 | 2014 | static int addrconf_ifid_gre(u8 *eui, struct net_device *dev) |
2015 | { | |
2016 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
2017 | } | |
2018 | ||
e837735e ND |
2019 | static int addrconf_ifid_ip6tnl(u8 *eui, struct net_device *dev) |
2020 | { | |
2021 | memcpy(eui, dev->perm_addr, 3); | |
2022 | memcpy(eui + 5, dev->perm_addr + 3, 3); | |
2023 | eui[3] = 0xFF; | |
2024 | eui[4] = 0xFE; | |
2025 | eui[0] ^= 2; | |
2026 | return 0; | |
2027 | } | |
2028 | ||
1da177e4 LT |
2029 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
2030 | { | |
2031 | switch (dev->type) { | |
2032 | case ARPHRD_ETHER: | |
2033 | case ARPHRD_FDDI: | |
073a8e0e | 2034 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 2035 | case ARPHRD_ARCNET: |
073a8e0e | 2036 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 2037 | case ARPHRD_INFINIBAND: |
073a8e0e | 2038 | return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0 | 2039 | case ARPHRD_SIT: |
dfd982ba | 2040 | return addrconf_ifid_sit(eui, dev); |
aee80b54 | 2041 | case ARPHRD_IPGRE: |
2042 | return addrconf_ifid_gre(eui, dev); | |
e74bccb8 | 2043 | case ARPHRD_6LOWPAN: |
06a4c1c5 | 2044 | case ARPHRD_IEEE802154: |
2045 | return addrconf_ifid_eui64(eui, dev); | |
cb6bf355 YH |
2046 | case ARPHRD_IEEE1394: |
2047 | return addrconf_ifid_ieee1394(eui, dev); | |
e837735e ND |
2048 | case ARPHRD_TUNNEL6: |
2049 | return addrconf_ifid_ip6tnl(eui, dev); | |
1da177e4 LT |
2050 | } |
2051 | return -1; | |
2052 | } | |
2053 | ||
2054 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
2055 | { | |
2056 | int err = -1; | |
2057 | struct inet6_ifaddr *ifp; | |
2058 | ||
2059 | read_lock_bh(&idev->lock); | |
602582ca HFS |
2060 | list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) { |
2061 | if (ifp->scope > IFA_LINK) | |
2062 | break; | |
1da177e4 LT |
2063 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { |
2064 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
2065 | err = 0; | |
2066 | break; | |
2067 | } | |
2068 | } | |
2069 | read_unlock_bh(&idev->lock); | |
2070 | return err; | |
2071 | } | |
2072 | ||
1da177e4 | 2073 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ |
eb7e0575 | 2074 | static void __ipv6_regen_rndid(struct inet6_dev *idev) |
1da177e4 | 2075 | { |
1da177e4 | 2076 | regen: |
955189ef | 2077 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 2078 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
2079 | |
2080 | /* | |
2081 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
2082 | * check if generated address is not inappropriate | |
2083 | * | |
2084 | * - Reserved subnet anycast (RFC 2526) | |
2085 | * 11111101 11....11 1xxxxxxx | |
c7dc89c0 | 2086 | * - ISATAP (RFC4214) 6.1 |
1da177e4 LT |
2087 | * 00-00-5E-FE-xx-xx-xx-xx |
2088 | * - value 0 | |
2089 | * - XXX: already assigned to an address on the device | |
2090 | */ | |
1ab1457c | 2091 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
2092 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
2093 | (idev->rndid[7]&0x80)) | |
2094 | goto regen; | |
2095 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
2096 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
2097 | goto regen; | |
2098 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
2099 | goto regen; | |
2100 | } | |
1da177e4 LT |
2101 | } |
2102 | ||
2103 | static void ipv6_regen_rndid(unsigned long data) | |
2104 | { | |
2105 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
2106 | unsigned long expires; | |
2107 | ||
8814c4b5 | 2108 | rcu_read_lock_bh(); |
1da177e4 LT |
2109 | write_lock_bh(&idev->lock); |
2110 | ||
2111 | if (idev->dead) | |
2112 | goto out; | |
2113 | ||
eb7e0575 | 2114 | __ipv6_regen_rndid(idev); |
1ab1457c | 2115 | |
1da177e4 | 2116 | expires = jiffies + |
1ab1457c | 2117 | idev->cnf.temp_prefered_lft * HZ - |
1f9248e5 JP |
2118 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * |
2119 | NEIGH_VAR(idev->nd_parms, RETRANS_TIME) - | |
784e2710 | 2120 | idev->cnf.max_desync_factor * HZ; |
1da177e4 | 2121 | if (time_before(expires, jiffies)) { |
f3213831 JP |
2122 | pr_warn("%s: too short regeneration interval; timer disabled for %s\n", |
2123 | __func__, idev->dev->name); | |
1da177e4 LT |
2124 | goto out; |
2125 | } | |
2126 | ||
2127 | if (!mod_timer(&idev->regen_timer, expires)) | |
2128 | in6_dev_hold(idev); | |
2129 | ||
2130 | out: | |
2131 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 2132 | rcu_read_unlock_bh(); |
1da177e4 LT |
2133 | in6_dev_put(idev); |
2134 | } | |
2135 | ||
eb7e0575 | 2136 | static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) |
8e5e8f30 | 2137 | { |
1da177e4 | 2138 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) |
eb7e0575 | 2139 | __ipv6_regen_rndid(idev); |
1da177e4 | 2140 | } |
1da177e4 LT |
2141 | |
2142 | /* | |
2143 | * Add prefix route. | |
2144 | */ | |
2145 | ||
2146 | static void | |
2147 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 2148 | unsigned long expires, u32 flags) |
1da177e4 | 2149 | { |
86872cb5 | 2150 | struct fib6_config cfg = { |
ca254490 | 2151 | .fc_table = l3mdev_fib_table(dev) ? : RT6_TABLE_PREFIX, |
86872cb5 TG |
2152 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
2153 | .fc_ifindex = dev->ifindex, | |
2154 | .fc_expires = expires, | |
2155 | .fc_dst_len = plen, | |
2156 | .fc_flags = RTF_UP | flags, | |
c346dca1 | 2157 | .fc_nlinfo.nl_net = dev_net(dev), |
f410a1fb | 2158 | .fc_protocol = RTPROT_KERNEL, |
86872cb5 | 2159 | }; |
1da177e4 | 2160 | |
4e3fd7a0 | 2161 | cfg.fc_dst = *pfx; |
1da177e4 LT |
2162 | |
2163 | /* Prevent useless cloning on PtP SIT. | |
2164 | This thing is done here expecting that the whole | |
2165 | class of non-broadcast devices need not cloning. | |
2166 | */ | |
07a93626 | 2167 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
86872cb5 TG |
2168 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
2169 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 2170 | #endif |
1da177e4 | 2171 | |
86872cb5 | 2172 | ip6_route_add(&cfg); |
1da177e4 LT |
2173 | } |
2174 | ||
14ef37b6 AH |
2175 | |
2176 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, | |
2177 | int plen, | |
2178 | const struct net_device *dev, | |
2179 | u32 flags, u32 noflags) | |
2180 | { | |
2181 | struct fib6_node *fn; | |
2182 | struct rt6_info *rt = NULL; | |
2183 | struct fib6_table *table; | |
ca254490 | 2184 | u32 tb_id = l3mdev_fib_table(dev) ? : RT6_TABLE_PREFIX; |
14ef37b6 | 2185 | |
ca254490 | 2186 | table = fib6_get_table(dev_net(dev), tb_id); |
63159f29 | 2187 | if (!table) |
14ef37b6 AH |
2188 | return NULL; |
2189 | ||
5744dd9b | 2190 | read_lock_bh(&table->tb6_lock); |
14ef37b6 AH |
2191 | fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0); |
2192 | if (!fn) | |
2193 | goto out; | |
1f56a01f MKL |
2194 | |
2195 | noflags |= RTF_CACHE; | |
14ef37b6 | 2196 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { |
d1918542 | 2197 | if (rt->dst.dev->ifindex != dev->ifindex) |
14ef37b6 AH |
2198 | continue; |
2199 | if ((rt->rt6i_flags & flags) != flags) | |
2200 | continue; | |
85da53bf | 2201 | if ((rt->rt6i_flags & noflags) != 0) |
14ef37b6 AH |
2202 | continue; |
2203 | dst_hold(&rt->dst); | |
2204 | break; | |
2205 | } | |
2206 | out: | |
5744dd9b | 2207 | read_unlock_bh(&table->tb6_lock); |
14ef37b6 AH |
2208 | return rt; |
2209 | } | |
2210 | ||
2211 | ||
1da177e4 LT |
2212 | /* Create "default" multicast route to the interface */ |
2213 | ||
2214 | static void addrconf_add_mroute(struct net_device *dev) | |
2215 | { | |
86872cb5 | 2216 | struct fib6_config cfg = { |
ca254490 | 2217 | .fc_table = l3mdev_fib_table(dev) ? : RT6_TABLE_LOCAL, |
86872cb5 TG |
2218 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
2219 | .fc_ifindex = dev->ifindex, | |
2220 | .fc_dst_len = 8, | |
2221 | .fc_flags = RTF_UP, | |
c346dca1 | 2222 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 TG |
2223 | }; |
2224 | ||
2225 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
2226 | ||
2227 | ip6_route_add(&cfg); | |
1da177e4 LT |
2228 | } |
2229 | ||
1da177e4 LT |
2230 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) |
2231 | { | |
2232 | struct inet6_dev *idev; | |
2233 | ||
2234 | ASSERT_RTNL(); | |
2235 | ||
e21e8467 SH |
2236 | idev = ipv6_find_idev(dev); |
2237 | if (!idev) | |
64e724f6 BH |
2238 | return ERR_PTR(-ENOBUFS); |
2239 | ||
2240 | if (idev->cnf.disable_ipv6) | |
2241 | return ERR_PTR(-EACCES); | |
1da177e4 LT |
2242 | |
2243 | /* Add default multicast route */ | |
4af04aba LW |
2244 | if (!(dev->flags & IFF_LOOPBACK)) |
2245 | addrconf_add_mroute(dev); | |
1da177e4 | 2246 | |
1da177e4 LT |
2247 | return idev; |
2248 | } | |
2249 | ||
53bd6749 JP |
2250 | static void manage_tempaddrs(struct inet6_dev *idev, |
2251 | struct inet6_ifaddr *ifp, | |
2252 | __u32 valid_lft, __u32 prefered_lft, | |
2253 | bool create, unsigned long now) | |
2254 | { | |
2255 | u32 flags; | |
2256 | struct inet6_ifaddr *ift; | |
2257 | ||
2258 | read_lock_bh(&idev->lock); | |
2259 | /* update all temporary addresses in the list */ | |
2260 | list_for_each_entry(ift, &idev->tempaddr_list, tmp_list) { | |
2261 | int age, max_valid, max_prefered; | |
2262 | ||
2263 | if (ifp != ift->ifpub) | |
2264 | continue; | |
2265 | ||
2266 | /* RFC 4941 section 3.3: | |
2267 | * If a received option will extend the lifetime of a public | |
2268 | * address, the lifetimes of temporary addresses should | |
2269 | * be extended, subject to the overall constraint that no | |
2270 | * temporary addresses should ever remain "valid" or "preferred" | |
2271 | * for a time longer than (TEMP_VALID_LIFETIME) or | |
2272 | * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), respectively. | |
2273 | */ | |
2274 | age = (now - ift->cstamp) / HZ; | |
2275 | max_valid = idev->cnf.temp_valid_lft - age; | |
2276 | if (max_valid < 0) | |
2277 | max_valid = 0; | |
2278 | ||
2279 | max_prefered = idev->cnf.temp_prefered_lft - | |
2280 | idev->cnf.max_desync_factor - age; | |
2281 | if (max_prefered < 0) | |
2282 | max_prefered = 0; | |
2283 | ||
2284 | if (valid_lft > max_valid) | |
2285 | valid_lft = max_valid; | |
2286 | ||
2287 | if (prefered_lft > max_prefered) | |
2288 | prefered_lft = max_prefered; | |
2289 | ||
2290 | spin_lock(&ift->lock); | |
2291 | flags = ift->flags; | |
2292 | ift->valid_lft = valid_lft; | |
2293 | ift->prefered_lft = prefered_lft; | |
2294 | ift->tstamp = now; | |
2295 | if (prefered_lft > 0) | |
2296 | ift->flags &= ~IFA_F_DEPRECATED; | |
2297 | ||
2298 | spin_unlock(&ift->lock); | |
2299 | if (!(flags&IFA_F_TENTATIVE)) | |
2300 | ipv6_ifa_notify(0, ift); | |
2301 | } | |
2302 | ||
2303 | if ((create || list_empty(&idev->tempaddr_list)) && | |
2304 | idev->cnf.use_tempaddr > 0) { | |
2305 | /* When a new public address is created as described | |
2306 | * in [ADDRCONF], also create a new temporary address. | |
2307 | * Also create a temporary address if it's enabled but | |
2308 | * no temporary address currently exists. | |
2309 | */ | |
2310 | read_unlock_bh(&idev->lock); | |
2311 | ipv6_create_tempaddr(ifp, NULL); | |
2312 | } else { | |
2313 | read_unlock_bh(&idev->lock); | |
2314 | } | |
2315 | } | |
2316 | ||
e6bff995 | 2317 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao) |
1da177e4 LT |
2318 | { |
2319 | struct prefix_info *pinfo; | |
2320 | __u32 valid_lft; | |
2321 | __u32 prefered_lft; | |
2322 | int addr_type; | |
64236f3f | 2323 | u32 addr_flags = 0; |
1da177e4 | 2324 | struct inet6_dev *in6_dev; |
56d417b1 | 2325 | struct net *net = dev_net(dev); |
1da177e4 LT |
2326 | |
2327 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 2328 | |
1da177e4 | 2329 | if (len < sizeof(struct prefix_info)) { |
ba3542e1 | 2330 | ADBG("addrconf: prefix option too short\n"); |
1da177e4 LT |
2331 | return; |
2332 | } | |
1ab1457c | 2333 | |
1da177e4 LT |
2334 | /* |
2335 | * Validation checks ([ADDRCONF], page 19) | |
2336 | */ | |
2337 | ||
2338 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
2339 | ||
2340 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
2341 | return; | |
2342 | ||
2343 | valid_lft = ntohl(pinfo->valid); | |
2344 | prefered_lft = ntohl(pinfo->prefered); | |
2345 | ||
2346 | if (prefered_lft > valid_lft) { | |
e87cc472 | 2347 | net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n"); |
1da177e4 LT |
2348 | return; |
2349 | } | |
2350 | ||
2351 | in6_dev = in6_dev_get(dev); | |
2352 | ||
63159f29 | 2353 | if (!in6_dev) { |
e87cc472 JP |
2354 | net_dbg_ratelimited("addrconf: device %s not configured\n", |
2355 | dev->name); | |
1da177e4 LT |
2356 | return; |
2357 | } | |
2358 | ||
2359 | /* | |
2360 | * Two things going on here: | |
2361 | * 1) Add routes for on-link prefixes | |
2362 | * 2) Configure prefixes with the auto flag set | |
2363 | */ | |
2364 | ||
4bed72e4 YH |
2365 | if (pinfo->onlink) { |
2366 | struct rt6_info *rt; | |
2367 | unsigned long rt_expires; | |
2368 | ||
6f704992 YH |
2369 | /* Avoid arithmetic overflow. Really, we could |
2370 | * save rt_expires in seconds, likely valid_lft, | |
2371 | * but it would require division in fib gc, that it | |
2372 | * not good. | |
2373 | */ | |
4bed72e4 YH |
2374 | if (HZ > USER_HZ) |
2375 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); | |
2376 | else | |
2377 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); | |
3dd4bc68 | 2378 | |
4bed72e4 YH |
2379 | if (addrconf_finite_timeout(rt_expires)) |
2380 | rt_expires *= HZ; | |
1da177e4 | 2381 | |
14ef37b6 AH |
2382 | rt = addrconf_get_prefix_route(&pinfo->prefix, |
2383 | pinfo->prefix_len, | |
2384 | dev, | |
2385 | RTF_ADDRCONF | RTF_PREFIX_RT, | |
2386 | RTF_GATEWAY | RTF_DEFAULT); | |
1da177e4 | 2387 | |
14ef37b6 | 2388 | if (rt) { |
6f704992 YH |
2389 | /* Autoconf prefix route */ |
2390 | if (valid_lft == 0) { | |
2391 | ip6_del_rt(rt); | |
2392 | rt = NULL; | |
4bed72e4 | 2393 | } else if (addrconf_finite_timeout(rt_expires)) { |
6f704992 | 2394 | /* not infinity */ |
1716a961 | 2395 | rt6_set_expires(rt, jiffies + rt_expires); |
6f704992 | 2396 | } else { |
1716a961 | 2397 | rt6_clean_expires(rt); |
1da177e4 LT |
2398 | } |
2399 | } else if (valid_lft) { | |
6f704992 | 2400 | clock_t expires = 0; |
4bed72e4 YH |
2401 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
2402 | if (addrconf_finite_timeout(rt_expires)) { | |
6f704992 YH |
2403 | /* not infinity */ |
2404 | flags |= RTF_EXPIRES; | |
2405 | expires = jiffies_to_clock_t(rt_expires); | |
2406 | } | |
1da177e4 | 2407 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
6f704992 | 2408 | dev, expires, flags); |
1da177e4 | 2409 | } |
94e187c0 | 2410 | ip6_rt_put(rt); |
1da177e4 LT |
2411 | } |
2412 | ||
2413 | /* Try to figure out our local address for this prefix */ | |
2414 | ||
2415 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
8e5e8f30 | 2416 | struct inet6_ifaddr *ifp; |
1da177e4 LT |
2417 | struct in6_addr addr; |
2418 | int create = 0, update_lft = 0; | |
617fe29d | 2419 | bool tokenized = false; |
1da177e4 LT |
2420 | |
2421 | if (pinfo->prefix_len == 64) { | |
2422 | memcpy(&addr, &pinfo->prefix, 8); | |
f53adae4 DB |
2423 | |
2424 | if (!ipv6_addr_any(&in6_dev->token)) { | |
2425 | read_lock_bh(&in6_dev->lock); | |
2426 | memcpy(addr.s6_addr + 8, | |
2427 | in6_dev->token.s6_addr + 8, 8); | |
2428 | read_unlock_bh(&in6_dev->lock); | |
617fe29d | 2429 | tokenized = true; |
622c81d5 HFS |
2430 | } else if (in6_dev->addr_gen_mode == |
2431 | IN6_ADDR_GEN_MODE_STABLE_PRIVACY && | |
2432 | !ipv6_generate_stable_address(&addr, 0, | |
2433 | in6_dev)) { | |
64236f3f | 2434 | addr_flags |= IFA_F_STABLE_PRIVACY; |
622c81d5 | 2435 | goto ok; |
f53adae4 DB |
2436 | } else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && |
2437 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1da177e4 LT |
2438 | in6_dev_put(in6_dev); |
2439 | return; | |
2440 | } | |
2441 | goto ok; | |
2442 | } | |
e87cc472 JP |
2443 | net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n", |
2444 | pinfo->prefix_len); | |
1da177e4 LT |
2445 | in6_dev_put(in6_dev); |
2446 | return; | |
2447 | ||
2448 | ok: | |
2449 | ||
53b7997f | 2450 | ifp = ipv6_get_ifaddr(net, &addr, dev, 1); |
1da177e4 | 2451 | |
63159f29 | 2452 | if (!ifp && valid_lft) { |
1da177e4 | 2453 | int max_addresses = in6_dev->cnf.max_addresses; |
95c385b4 NH |
2454 | |
2455 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2456 | if (in6_dev->cnf.optimistic_dad && | |
e6bff995 | 2457 | !net->ipv6.devconf_all->forwarding && sllao) |
95c385b4 NH |
2458 | addr_flags = IFA_F_OPTIMISTIC; |
2459 | #endif | |
1da177e4 LT |
2460 | |
2461 | /* Do not allow to create too much of autoconfigured | |
2462 | * addresses; this would be too easy way to crash kernel. | |
2463 | */ | |
2464 | if (!max_addresses || | |
2465 | ipv6_count_addresses(in6_dev) < max_addresses) | |
3f8f5298 JP |
2466 | ifp = ipv6_add_addr(in6_dev, &addr, NULL, |
2467 | pinfo->prefix_len, | |
95c385b4 | 2468 | addr_type&IPV6_ADDR_SCOPE_MASK, |
8a226b2c JB |
2469 | addr_flags, valid_lft, |
2470 | prefered_lft); | |
1da177e4 | 2471 | |
3f0d2ba0 | 2472 | if (IS_ERR_OR_NULL(ifp)) { |
1da177e4 LT |
2473 | in6_dev_put(in6_dev); |
2474 | return; | |
2475 | } | |
2476 | ||
8a226b2c JB |
2477 | update_lft = 0; |
2478 | create = 1; | |
c15b1cca HFS |
2479 | spin_lock_bh(&ifp->lock); |
2480 | ifp->flags |= IFA_F_MANAGETEMPADDR; | |
1da177e4 | 2481 | ifp->cstamp = jiffies; |
617fe29d | 2482 | ifp->tokenized = tokenized; |
c15b1cca | 2483 | spin_unlock_bh(&ifp->lock); |
cf22f9a2 | 2484 | addrconf_dad_start(ifp); |
1da177e4 LT |
2485 | } |
2486 | ||
2487 | if (ifp) { | |
479840ff | 2488 | u32 flags; |
1da177e4 | 2489 | unsigned long now; |
1da177e4 LT |
2490 | u32 stored_lft; |
2491 | ||
2492 | /* update lifetime (RFC2462 5.5.3 e) */ | |
8e8e676d | 2493 | spin_lock_bh(&ifp->lock); |
1da177e4 LT |
2494 | now = jiffies; |
2495 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
2496 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
2497 | else | |
2498 | stored_lft = 0; | |
8a226b2c | 2499 | if (!update_lft && !create && stored_lft) { |
9451a304 FF |
2500 | const u32 minimum_lft = min_t(u32, |
2501 | stored_lft, MIN_VALID_LIFETIME); | |
c9d55d5b PM |
2502 | valid_lft = max(valid_lft, minimum_lft); |
2503 | ||
2504 | /* RFC4862 Section 5.5.3e: | |
2505 | * "Note that the preferred lifetime of the | |
2506 | * corresponding address is always reset to | |
2507 | * the Preferred Lifetime in the received | |
2508 | * Prefix Information option, regardless of | |
2509 | * whether the valid lifetime is also reset or | |
2510 | * ignored." | |
2511 | * | |
2512 | * So we should always update prefered_lft here. | |
2513 | */ | |
2514 | update_lft = 1; | |
1da177e4 LT |
2515 | } |
2516 | ||
2517 | if (update_lft) { | |
2518 | ifp->valid_lft = valid_lft; | |
2519 | ifp->prefered_lft = prefered_lft; | |
2520 | ifp->tstamp = now; | |
2521 | flags = ifp->flags; | |
2522 | ifp->flags &= ~IFA_F_DEPRECATED; | |
8e8e676d | 2523 | spin_unlock_bh(&ifp->lock); |
1da177e4 LT |
2524 | |
2525 | if (!(flags&IFA_F_TENTATIVE)) | |
2526 | ipv6_ifa_notify(0, ifp); | |
2527 | } else | |
8e8e676d | 2528 | spin_unlock_bh(&ifp->lock); |
1da177e4 | 2529 | |
53bd6749 JP |
2530 | manage_tempaddrs(in6_dev, ifp, valid_lft, prefered_lft, |
2531 | create, now); | |
5d9efa7e | 2532 | |
1da177e4 | 2533 | in6_ifa_put(ifp); |
c15b1cca | 2534 | addrconf_verify(); |
1da177e4 LT |
2535 | } |
2536 | } | |
2537 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
2538 | in6_dev_put(in6_dev); | |
2539 | } | |
2540 | ||
2541 | /* | |
2542 | * Set destination address. | |
2543 | * Special case for SIT interfaces where we create a new "virtual" | |
2544 | * device. | |
2545 | */ | |
af284937 | 2546 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2547 | { |
2548 | struct in6_ifreq ireq; | |
2549 | struct net_device *dev; | |
2550 | int err = -EINVAL; | |
2551 | ||
2552 | rtnl_lock(); | |
2553 | ||
2554 | err = -EFAULT; | |
2555 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2556 | goto err_exit; | |
2557 | ||
af284937 | 2558 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
1da177e4 LT |
2559 | |
2560 | err = -ENODEV; | |
63159f29 | 2561 | if (!dev) |
1da177e4 LT |
2562 | goto err_exit; |
2563 | ||
07a93626 | 2564 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 | 2565 | if (dev->type == ARPHRD_SIT) { |
5bc3eb7e | 2566 | const struct net_device_ops *ops = dev->netdev_ops; |
1da177e4 | 2567 | struct ifreq ifr; |
1da177e4 LT |
2568 | struct ip_tunnel_parm p; |
2569 | ||
2570 | err = -EADDRNOTAVAIL; | |
2571 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
2572 | goto err_exit; | |
2573 | ||
2574 | memset(&p, 0, sizeof(p)); | |
2575 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
2576 | p.iph.saddr = 0; | |
2577 | p.iph.version = 4; | |
2578 | p.iph.ihl = 5; | |
2579 | p.iph.protocol = IPPROTO_IPV6; | |
2580 | p.iph.ttl = 64; | |
d20b3109 | 2581 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 | 2582 | |
5bc3eb7e SH |
2583 | if (ops->ndo_do_ioctl) { |
2584 | mm_segment_t oldfs = get_fs(); | |
2585 | ||
2586 | set_fs(KERNEL_DS); | |
2587 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
2588 | set_fs(oldfs); | |
2589 | } else | |
2590 | err = -EOPNOTSUPP; | |
1da177e4 LT |
2591 | |
2592 | if (err == 0) { | |
2593 | err = -ENOBUFS; | |
af284937 DL |
2594 | dev = __dev_get_by_name(net, p.name); |
2595 | if (!dev) | |
1da177e4 LT |
2596 | goto err_exit; |
2597 | err = dev_open(dev); | |
2598 | } | |
2599 | } | |
0be669bb | 2600 | #endif |
1da177e4 LT |
2601 | |
2602 | err_exit: | |
2603 | rtnl_unlock(); | |
2604 | return err; | |
2605 | } | |
2606 | ||
93a714d6 MC |
2607 | static int ipv6_mc_config(struct sock *sk, bool join, |
2608 | const struct in6_addr *addr, int ifindex) | |
2609 | { | |
2610 | int ret; | |
2611 | ||
2612 | ASSERT_RTNL(); | |
2613 | ||
2614 | lock_sock(sk); | |
2615 | if (join) | |
54ff9ef3 | 2616 | ret = ipv6_sock_mc_join(sk, ifindex, addr); |
93a714d6 | 2617 | else |
54ff9ef3 | 2618 | ret = ipv6_sock_mc_drop(sk, ifindex, addr); |
93a714d6 MC |
2619 | release_sock(sk); |
2620 | ||
2621 | return ret; | |
2622 | } | |
2623 | ||
1da177e4 LT |
2624 | /* |
2625 | * Manual configuration of address on an interface | |
2626 | */ | |
479840ff JP |
2627 | static int inet6_addr_add(struct net *net, int ifindex, |
2628 | const struct in6_addr *pfx, | |
caeaba79 | 2629 | const struct in6_addr *peer_pfx, |
479840ff JP |
2630 | unsigned int plen, __u32 ifa_flags, |
2631 | __u32 prefered_lft, __u32 valid_lft) | |
1da177e4 LT |
2632 | { |
2633 | struct inet6_ifaddr *ifp; | |
2634 | struct inet6_dev *idev; | |
2635 | struct net_device *dev; | |
93a714d6 MC |
2636 | unsigned long timeout; |
2637 | clock_t expires; | |
1da177e4 | 2638 | int scope; |
6f704992 | 2639 | u32 flags; |
1da177e4 LT |
2640 | |
2641 | ASSERT_RTNL(); | |
1ab1457c | 2642 | |
24ef0da7 TG |
2643 | if (plen > 128) |
2644 | return -EINVAL; | |
2645 | ||
0778769d NT |
2646 | /* check the lifetime */ |
2647 | if (!valid_lft || prefered_lft > valid_lft) | |
2648 | return -EINVAL; | |
2649 | ||
53bd6749 JP |
2650 | if (ifa_flags & IFA_F_MANAGETEMPADDR && plen != 64) |
2651 | return -EINVAL; | |
2652 | ||
af284937 DL |
2653 | dev = __dev_get_by_index(net, ifindex); |
2654 | if (!dev) | |
1da177e4 | 2655 | return -ENODEV; |
1ab1457c | 2656 | |
64e724f6 BH |
2657 | idev = addrconf_add_dev(dev); |
2658 | if (IS_ERR(idev)) | |
2659 | return PTR_ERR(idev); | |
1da177e4 | 2660 | |
93a714d6 MC |
2661 | if (ifa_flags & IFA_F_MCAUTOJOIN) { |
2662 | int ret = ipv6_mc_config(net->ipv6.mc_autojoin_sk, | |
2663 | true, pfx, ifindex); | |
2664 | ||
2665 | if (ret < 0) | |
2666 | return ret; | |
2667 | } | |
2668 | ||
1da177e4 LT |
2669 | scope = ipv6_addr_scope(pfx); |
2670 | ||
4bed72e4 YH |
2671 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
2672 | if (addrconf_finite_timeout(timeout)) { | |
2673 | expires = jiffies_to_clock_t(timeout * HZ); | |
2674 | valid_lft = timeout; | |
6f704992 | 2675 | flags = RTF_EXPIRES; |
4bed72e4 YH |
2676 | } else { |
2677 | expires = 0; | |
2678 | flags = 0; | |
2679 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 2680 | } |
0778769d | 2681 | |
4bed72e4 YH |
2682 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
2683 | if (addrconf_finite_timeout(timeout)) { | |
2684 | if (timeout == 0) | |
2685 | ifa_flags |= IFA_F_DEPRECATED; | |
2686 | prefered_lft = timeout; | |
2687 | } | |
0778769d | 2688 | |
8a226b2c JB |
2689 | ifp = ipv6_add_addr(idev, pfx, peer_pfx, plen, scope, ifa_flags, |
2690 | valid_lft, prefered_lft); | |
0778769d | 2691 | |
1da177e4 | 2692 | if (!IS_ERR(ifp)) { |
761aac73 TH |
2693 | if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) { |
2694 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, | |
2695 | expires, flags); | |
2696 | } | |
2697 | ||
95c385b4 NH |
2698 | /* |
2699 | * Note that section 3.1 of RFC 4429 indicates | |
2700 | * that the Optimistic flag should not be set for | |
2701 | * manually configured addresses | |
2702 | */ | |
cf22f9a2 | 2703 | addrconf_dad_start(ifp); |
53bd6749 JP |
2704 | if (ifa_flags & IFA_F_MANAGETEMPADDR) |
2705 | manage_tempaddrs(idev, ifp, valid_lft, prefered_lft, | |
2706 | true, jiffies); | |
1da177e4 | 2707 | in6_ifa_put(ifp); |
c15b1cca | 2708 | addrconf_verify_rtnl(); |
1da177e4 | 2709 | return 0; |
93a714d6 MC |
2710 | } else if (ifa_flags & IFA_F_MCAUTOJOIN) { |
2711 | ipv6_mc_config(net->ipv6.mc_autojoin_sk, | |
2712 | false, pfx, ifindex); | |
1da177e4 LT |
2713 | } |
2714 | ||
2715 | return PTR_ERR(ifp); | |
2716 | } | |
2717 | ||
6046d5b4 HK |
2718 | static int inet6_addr_del(struct net *net, int ifindex, u32 ifa_flags, |
2719 | const struct in6_addr *pfx, unsigned int plen) | |
1da177e4 LT |
2720 | { |
2721 | struct inet6_ifaddr *ifp; | |
2722 | struct inet6_dev *idev; | |
2723 | struct net_device *dev; | |
1ab1457c | 2724 | |
24ef0da7 TG |
2725 | if (plen > 128) |
2726 | return -EINVAL; | |
2727 | ||
af284937 DL |
2728 | dev = __dev_get_by_index(net, ifindex); |
2729 | if (!dev) | |
1da177e4 LT |
2730 | return -ENODEV; |
2731 | ||
e5d08d71 | 2732 | idev = __in6_dev_get(dev); |
63159f29 | 2733 | if (!idev) |
1da177e4 LT |
2734 | return -ENXIO; |
2735 | ||
2736 | read_lock_bh(&idev->lock); | |
502a2ffd | 2737 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
2738 | if (ifp->prefix_len == plen && |
2739 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
2740 | in6_ifa_hold(ifp); | |
2741 | read_unlock_bh(&idev->lock); | |
1ab1457c | 2742 | |
6046d5b4 HK |
2743 | if (!(ifp->flags & IFA_F_TEMPORARY) && |
2744 | (ifa_flags & IFA_F_MANAGETEMPADDR)) | |
2745 | manage_tempaddrs(idev, ifp, 0, 0, false, | |
2746 | jiffies); | |
1da177e4 | 2747 | ipv6_del_addr(ifp); |
6046d5b4 | 2748 | addrconf_verify_rtnl(); |
93a714d6 MC |
2749 | if (ipv6_addr_is_multicast(pfx)) { |
2750 | ipv6_mc_config(net->ipv6.mc_autojoin_sk, | |
2751 | false, pfx, dev->ifindex); | |
2752 | } | |
1da177e4 LT |
2753 | return 0; |
2754 | } | |
2755 | } | |
2756 | read_unlock_bh(&idev->lock); | |
2757 | return -EADDRNOTAVAIL; | |
2758 | } | |
2759 | ||
2760 | ||
af284937 | 2761 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2762 | { |
2763 | struct in6_ifreq ireq; | |
2764 | int err; | |
1ab1457c | 2765 | |
af31f412 | 2766 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 | 2767 | return -EPERM; |
1ab1457c | 2768 | |
1da177e4 LT |
2769 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2770 | return -EFAULT; | |
2771 | ||
2772 | rtnl_lock(); | |
caeaba79 | 2773 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, NULL, |
af284937 DL |
2774 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, |
2775 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 LT |
2776 | rtnl_unlock(); |
2777 | return err; | |
2778 | } | |
2779 | ||
af284937 | 2780 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2781 | { |
2782 | struct in6_ifreq ireq; | |
2783 | int err; | |
1ab1457c | 2784 | |
af31f412 | 2785 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
2786 | return -EPERM; |
2787 | ||
2788 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2789 | return -EFAULT; | |
2790 | ||
2791 | rtnl_lock(); | |
6046d5b4 | 2792 | err = inet6_addr_del(net, ireq.ifr6_ifindex, 0, &ireq.ifr6_addr, |
af284937 | 2793 | ireq.ifr6_prefixlen); |
1da177e4 LT |
2794 | rtnl_unlock(); |
2795 | return err; | |
2796 | } | |
2797 | ||
b5f348e5 IJ |
2798 | static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
2799 | int plen, int scope) | |
2800 | { | |
2801 | struct inet6_ifaddr *ifp; | |
2802 | ||
8a226b2c | 2803 | ifp = ipv6_add_addr(idev, addr, NULL, plen, |
07edd741 HFS |
2804 | scope, IFA_F_PERMANENT, |
2805 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
b5f348e5 IJ |
2806 | if (!IS_ERR(ifp)) { |
2807 | spin_lock_bh(&ifp->lock); | |
2808 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2809 | spin_unlock_bh(&ifp->lock); | |
2810 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2811 | in6_ifa_put(ifp); | |
2812 | } | |
2813 | } | |
2814 | ||
07a93626 | 2815 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2816 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2817 | { | |
1da177e4 LT |
2818 | struct in6_addr addr; |
2819 | struct net_device *dev; | |
c346dca1 | 2820 | struct net *net = dev_net(idev->dev); |
929c9cf3 | 2821 | int scope, plen; |
f0e2acfa | 2822 | u32 pflags = 0; |
1da177e4 LT |
2823 | |
2824 | ASSERT_RTNL(); | |
2825 | ||
2826 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2827 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2828 | ||
2829 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2830 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2831 | scope = IFA_LINK; | |
929c9cf3 | 2832 | plen = 64; |
1da177e4 LT |
2833 | } else { |
2834 | scope = IPV6_ADDR_COMPATv4; | |
929c9cf3 | 2835 | plen = 96; |
f0e2acfa | 2836 | pflags |= RTF_NONEXTHOP; |
1da177e4 LT |
2837 | } |
2838 | ||
2839 | if (addr.s6_addr32[3]) { | |
929c9cf3 | 2840 | add_addr(idev, &addr, plen, scope); |
f0e2acfa | 2841 | addrconf_prefix_route(&addr, plen, idev->dev, 0, pflags); |
1da177e4 LT |
2842 | return; |
2843 | } | |
2844 | ||
6fda7350 | 2845 | for_each_netdev(net, dev) { |
8e5e8f30 | 2846 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 | 2847 | if (in_dev && (dev->flags & IFF_UP)) { |
8e5e8f30 | 2848 | struct in_ifaddr *ifa; |
1da177e4 LT |
2849 | |
2850 | int flag = scope; | |
2851 | ||
2852 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
1da177e4 LT |
2853 | |
2854 | addr.s6_addr32[3] = ifa->ifa_local; | |
2855 | ||
2856 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2857 | continue; | |
2858 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2859 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2860 | continue; | |
2861 | flag |= IFA_HOST; | |
2862 | } | |
1da177e4 | 2863 | |
b5f348e5 | 2864 | add_addr(idev, &addr, plen, flag); |
f0e2acfa ND |
2865 | addrconf_prefix_route(&addr, plen, idev->dev, 0, |
2866 | pflags); | |
1da177e4 LT |
2867 | } |
2868 | } | |
1ab1457c | 2869 | } |
1da177e4 | 2870 | } |
0be669bb | 2871 | #endif |
1da177e4 LT |
2872 | |
2873 | static void init_loopback(struct net_device *dev) | |
2874 | { | |
2875 | struct inet6_dev *idev; | |
25fb6ca4 BK |
2876 | struct net_device *sp_dev; |
2877 | struct inet6_ifaddr *sp_ifa; | |
2878 | struct rt6_info *sp_rt; | |
1da177e4 LT |
2879 | |
2880 | /* ::1 */ | |
2881 | ||
2882 | ASSERT_RTNL(); | |
2883 | ||
e5d08d71 | 2884 | idev = ipv6_find_idev(dev); |
63159f29 | 2885 | if (!idev) { |
91df42be | 2886 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
2887 | return; |
2888 | } | |
2889 | ||
b5f348e5 | 2890 | add_addr(idev, &in6addr_loopback, 128, IFA_HOST); |
25fb6ca4 BK |
2891 | |
2892 | /* Add routes to other interface's IPv6 addresses */ | |
2893 | for_each_netdev(dev_net(dev), sp_dev) { | |
2894 | if (!strcmp(sp_dev->name, dev->name)) | |
2895 | continue; | |
2896 | ||
2897 | idev = __in6_dev_get(sp_dev); | |
2898 | if (!idev) | |
2899 | continue; | |
2900 | ||
2901 | read_lock_bh(&idev->lock); | |
2902 | list_for_each_entry(sp_ifa, &idev->addr_list, if_list) { | |
2903 | ||
2904 | if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE)) | |
2905 | continue; | |
2906 | ||
33d99113 G |
2907 | if (sp_ifa->rt) { |
2908 | /* This dst has been added to garbage list when | |
2909 | * lo device down, release this obsolete dst and | |
2910 | * reallocate a new router for ifa. | |
2911 | */ | |
2912 | if (sp_ifa->rt->dst.obsolete > 0) { | |
2913 | ip6_rt_put(sp_ifa->rt); | |
2914 | sp_ifa->rt = NULL; | |
2915 | } else { | |
2916 | continue; | |
2917 | } | |
2918 | } | |
a881ae1f | 2919 | |
57ec0afe | 2920 | sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, false); |
25fb6ca4 BK |
2921 | |
2922 | /* Failure cases are ignored */ | |
534c8779 G |
2923 | if (!IS_ERR(sp_rt)) { |
2924 | sp_ifa->rt = sp_rt; | |
25fb6ca4 | 2925 | ip6_ins_rt(sp_rt); |
534c8779 | 2926 | } |
25fb6ca4 BK |
2927 | } |
2928 | read_unlock_bh(&idev->lock); | |
2929 | } | |
1da177e4 LT |
2930 | } |
2931 | ||
64236f3f HFS |
2932 | static void addrconf_add_linklocal(struct inet6_dev *idev, |
2933 | const struct in6_addr *addr, u32 flags) | |
1da177e4 | 2934 | { |
8e5e8f30 | 2935 | struct inet6_ifaddr *ifp; |
64236f3f | 2936 | u32 addr_flags = flags | IFA_F_PERMANENT; |
95c385b4 NH |
2937 | |
2938 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2939 | if (idev->cnf.optimistic_dad && | |
702beb87 | 2940 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
95c385b4 NH |
2941 | addr_flags |= IFA_F_OPTIMISTIC; |
2942 | #endif | |
1da177e4 | 2943 | |
07edd741 HFS |
2944 | ifp = ipv6_add_addr(idev, addr, NULL, 64, IFA_LINK, addr_flags, |
2945 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 | 2946 | if (!IS_ERR(ifp)) { |
46d48046 | 2947 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
cf22f9a2 | 2948 | addrconf_dad_start(ifp); |
1da177e4 LT |
2949 | in6_ifa_put(ifp); |
2950 | } | |
2951 | } | |
2952 | ||
622c81d5 HFS |
2953 | static bool ipv6_reserved_interfaceid(struct in6_addr address) |
2954 | { | |
2955 | if ((address.s6_addr32[2] | address.s6_addr32[3]) == 0) | |
2956 | return true; | |
2957 | ||
2958 | if (address.s6_addr32[2] == htonl(0x02005eff) && | |
2959 | ((address.s6_addr32[3] & htonl(0xfe000000)) == htonl(0xfe000000))) | |
2960 | return true; | |
2961 | ||
2962 | if (address.s6_addr32[2] == htonl(0xfdffffff) && | |
2963 | ((address.s6_addr32[3] & htonl(0xffffff80)) == htonl(0xffffff80))) | |
2964 | return true; | |
2965 | ||
2966 | return false; | |
2967 | } | |
2968 | ||
2969 | static int ipv6_generate_stable_address(struct in6_addr *address, | |
2970 | u8 dad_count, | |
2971 | const struct inet6_dev *idev) | |
2972 | { | |
622c81d5 HFS |
2973 | static DEFINE_SPINLOCK(lock); |
2974 | static __u32 digest[SHA_DIGEST_WORDS]; | |
2975 | static __u32 workspace[SHA_WORKSPACE_WORDS]; | |
2976 | ||
2977 | static union { | |
2978 | char __data[SHA_MESSAGE_BYTES]; | |
2979 | struct { | |
2980 | struct in6_addr secret; | |
ff40217e | 2981 | __be32 prefix[2]; |
622c81d5 HFS |
2982 | unsigned char hwaddr[MAX_ADDR_LEN]; |
2983 | u8 dad_count; | |
2984 | } __packed; | |
2985 | } data; | |
2986 | ||
2987 | struct in6_addr secret; | |
2988 | struct in6_addr temp; | |
2989 | struct net *net = dev_net(idev->dev); | |
2990 | ||
2991 | BUILD_BUG_ON(sizeof(data.__data) != sizeof(data)); | |
2992 | ||
2993 | if (idev->cnf.stable_secret.initialized) | |
2994 | secret = idev->cnf.stable_secret.secret; | |
2995 | else if (net->ipv6.devconf_dflt->stable_secret.initialized) | |
2996 | secret = net->ipv6.devconf_dflt->stable_secret.secret; | |
2997 | else | |
2998 | return -1; | |
2999 | ||
3000 | retry: | |
3001 | spin_lock_bh(&lock); | |
3002 | ||
3003 | sha_init(digest); | |
3004 | memset(&data, 0, sizeof(data)); | |
3005 | memset(workspace, 0, sizeof(workspace)); | |
3006 | memcpy(data.hwaddr, idev->dev->perm_addr, idev->dev->addr_len); | |
ff40217e HFS |
3007 | data.prefix[0] = address->s6_addr32[0]; |
3008 | data.prefix[1] = address->s6_addr32[1]; | |
622c81d5 HFS |
3009 | data.secret = secret; |
3010 | data.dad_count = dad_count; | |
3011 | ||
3012 | sha_transform(digest, data.__data, workspace); | |
3013 | ||
3014 | temp = *address; | |
ff40217e HFS |
3015 | temp.s6_addr32[2] = (__force __be32)digest[0]; |
3016 | temp.s6_addr32[3] = (__force __be32)digest[1]; | |
622c81d5 HFS |
3017 | |
3018 | spin_unlock_bh(&lock); | |
3019 | ||
3020 | if (ipv6_reserved_interfaceid(temp)) { | |
3021 | dad_count++; | |
1855b7c3 | 3022 | if (dad_count > dev_net(idev->dev)->ipv6.sysctl.idgen_retries) |
622c81d5 HFS |
3023 | return -1; |
3024 | goto retry; | |
3025 | } | |
3026 | ||
3027 | *address = temp; | |
3028 | return 0; | |
3029 | } | |
3030 | ||
bc91b0f0 JP |
3031 | static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route) |
3032 | { | |
622c81d5 HFS |
3033 | struct in6_addr addr; |
3034 | ||
ca254490 DA |
3035 | /* no link local addresses on L3 master devices */ |
3036 | if (netif_is_l3_master(idev->dev)) | |
3037 | return; | |
3038 | ||
622c81d5 | 3039 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); |
bc91b0f0 | 3040 | |
622c81d5 HFS |
3041 | if (idev->addr_gen_mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY) { |
3042 | if (!ipv6_generate_stable_address(&addr, 0, idev)) | |
64236f3f HFS |
3043 | addrconf_add_linklocal(idev, &addr, |
3044 | IFA_F_STABLE_PRIVACY); | |
622c81d5 HFS |
3045 | else if (prefix_route) |
3046 | addrconf_prefix_route(&addr, 64, idev->dev, 0, 0); | |
3047 | } else if (idev->addr_gen_mode == IN6_ADDR_GEN_MODE_EUI64) { | |
bc91b0f0 JP |
3048 | /* addrconf_add_linklocal also adds a prefix_route and we |
3049 | * only need to care about prefix routes if ipv6_generate_eui64 | |
3050 | * couldn't generate one. | |
3051 | */ | |
3052 | if (ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) == 0) | |
64236f3f | 3053 | addrconf_add_linklocal(idev, &addr, 0); |
bc91b0f0 JP |
3054 | else if (prefix_route) |
3055 | addrconf_prefix_route(&addr, 64, idev->dev, 0, 0); | |
3056 | } | |
3057 | } | |
3058 | ||
1da177e4 LT |
3059 | static void addrconf_dev_config(struct net_device *dev) |
3060 | { | |
8e5e8f30 | 3061 | struct inet6_dev *idev; |
1da177e4 LT |
3062 | |
3063 | ASSERT_RTNL(); | |
3064 | ||
74235a25 HX |
3065 | if ((dev->type != ARPHRD_ETHER) && |
3066 | (dev->type != ARPHRD_FDDI) && | |
74235a25 | 3067 | (dev->type != ARPHRD_ARCNET) && |
06a4c1c5 | 3068 | (dev->type != ARPHRD_INFINIBAND) && |
cb6bf355 | 3069 | (dev->type != ARPHRD_IEEE802154) && |
e837735e | 3070 | (dev->type != ARPHRD_IEEE1394) && |
e74bccb8 JR |
3071 | (dev->type != ARPHRD_TUNNEL6) && |
3072 | (dev->type != ARPHRD_6LOWPAN)) { | |
74235a25 HX |
3073 | /* Alas, we support only Ethernet autoconfiguration. */ |
3074 | return; | |
3075 | } | |
3076 | ||
1da177e4 | 3077 | idev = addrconf_add_dev(dev); |
64e724f6 | 3078 | if (IS_ERR(idev)) |
1da177e4 LT |
3079 | return; |
3080 | ||
bc91b0f0 | 3081 | addrconf_addr_gen(idev, false); |
1da177e4 LT |
3082 | } |
3083 | ||
07a93626 | 3084 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
3085 | static void addrconf_sit_config(struct net_device *dev) |
3086 | { | |
3087 | struct inet6_dev *idev; | |
3088 | ||
3089 | ASSERT_RTNL(); | |
3090 | ||
1ab1457c YH |
3091 | /* |
3092 | * Configure the tunnel with one of our IPv4 | |
3093 | * addresses... we should configure all of | |
1da177e4 LT |
3094 | * our v4 addrs in the tunnel |
3095 | */ | |
3096 | ||
e5d08d71 | 3097 | idev = ipv6_find_idev(dev); |
63159f29 | 3098 | if (!idev) { |
91df42be | 3099 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
3100 | return; |
3101 | } | |
3102 | ||
c7dc89c0 | 3103 | if (dev->priv_flags & IFF_ISATAP) { |
bc91b0f0 | 3104 | addrconf_addr_gen(idev, false); |
c7dc89c0 FT |
3105 | return; |
3106 | } | |
3107 | ||
1da177e4 LT |
3108 | sit_add_v4_addrs(idev); |
3109 | ||
62b54dd9 | 3110 | if (dev->flags&IFF_POINTOPOINT) |
1da177e4 | 3111 | addrconf_add_mroute(dev); |
1da177e4 | 3112 | } |
0be669bb | 3113 | #endif |
1da177e4 | 3114 | |
07a93626 | 3115 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
aee80b54 | 3116 | static void addrconf_gre_config(struct net_device *dev) |
3117 | { | |
3118 | struct inet6_dev *idev; | |
aee80b54 | 3119 | |
aee80b54 | 3120 | ASSERT_RTNL(); |
3121 | ||
e5d08d71 | 3122 | idev = ipv6_find_idev(dev); |
63159f29 | 3123 | if (!idev) { |
91df42be | 3124 | pr_debug("%s: add_dev failed\n", __func__); |
aee80b54 | 3125 | return; |
3126 | } | |
3127 | ||
bc91b0f0 | 3128 | addrconf_addr_gen(idev, true); |
d9e4ce65 HFS |
3129 | if (dev->flags & IFF_POINTOPOINT) |
3130 | addrconf_add_mroute(dev); | |
aee80b54 | 3131 | } |
3132 | #endif | |
3133 | ||
1ab1457c | 3134 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
351638e7 | 3135 | void *ptr) |
1da177e4 | 3136 | { |
351638e7 | 3137 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
748e2d93 | 3138 | struct inet6_dev *idev = __in6_dev_get(dev); |
c5e33bdd | 3139 | int run_pending = 0; |
b217d616 | 3140 | int err; |
1da177e4 | 3141 | |
e21e8467 | 3142 | switch (event) { |
45ba9dd2 | 3143 | case NETDEV_REGISTER: |
74235a25 | 3144 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 | 3145 | idev = ipv6_add_dev(dev); |
a317a2f1 WC |
3146 | if (IS_ERR(idev)) |
3147 | return notifier_from_errno(PTR_ERR(idev)); | |
45ba9dd2 YH |
3148 | } |
3149 | break; | |
bcdd553f | 3150 | |
b7b0b1d2 AD |
3151 | case NETDEV_CHANGEMTU: |
3152 | /* if MTU under IPV6_MIN_MTU stop IPv6 on this interface. */ | |
3153 | if (dev->mtu < IPV6_MIN_MTU) { | |
3154 | addrconf_ifdown(dev, 1); | |
3155 | break; | |
3156 | } | |
3157 | ||
3158 | if (idev) { | |
3159 | rt6_mtu_change(dev, dev->mtu); | |
3160 | idev->cnf.mtu6 = dev->mtu; | |
3161 | break; | |
3162 | } | |
3163 | ||
3164 | /* allocate new idev */ | |
3165 | idev = ipv6_add_dev(dev); | |
3166 | if (IS_ERR(idev)) | |
3167 | break; | |
3168 | ||
3169 | /* device is still not ready */ | |
3170 | if (!(idev->if_flags & IF_READY)) | |
3171 | break; | |
3172 | ||
3173 | run_pending = 1; | |
3174 | ||
3175 | /* fall through */ | |
3176 | ||
1da177e4 | 3177 | case NETDEV_UP: |
3c21edbd | 3178 | case NETDEV_CHANGE: |
c2edacf8 JV |
3179 | if (dev->flags & IFF_SLAVE) |
3180 | break; | |
3181 | ||
3ce62a84 WC |
3182 | if (idev && idev->cnf.disable_ipv6) |
3183 | break; | |
3184 | ||
3c21edbd | 3185 | if (event == NETDEV_UP) { |
f24e3d65 | 3186 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd | 3187 | /* device is not ready yet. */ |
f3213831 | 3188 | pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n", |
3c21edbd YH |
3189 | dev->name); |
3190 | break; | |
3191 | } | |
99081049 | 3192 | |
d31c7b8f EP |
3193 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
3194 | idev = ipv6_add_dev(dev); | |
3195 | ||
a317a2f1 | 3196 | if (!IS_ERR_OR_NULL(idev)) { |
99081049 | 3197 | idev->if_flags |= IF_READY; |
e3ec6cfc BT |
3198 | run_pending = 1; |
3199 | } | |
b7b0b1d2 | 3200 | } else if (event == NETDEV_CHANGE) { |
f24e3d65 | 3201 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
3202 | /* device is still not ready. */ |
3203 | break; | |
3204 | } | |
3205 | ||
3206 | if (idev) { | |
bcdd553f | 3207 | if (idev->if_flags & IF_READY) |
3c21edbd YH |
3208 | /* device is already configured. */ |
3209 | break; | |
3c21edbd YH |
3210 | idev->if_flags |= IF_READY; |
3211 | } | |
3212 | ||
f3213831 JP |
3213 | pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n", |
3214 | dev->name); | |
3c21edbd | 3215 | |
c5e33bdd | 3216 | run_pending = 1; |
3c21edbd YH |
3217 | } |
3218 | ||
e21e8467 | 3219 | switch (dev->type) { |
07a93626 | 3220 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
3221 | case ARPHRD_SIT: |
3222 | addrconf_sit_config(dev); | |
3223 | break; | |
aee80b54 | 3224 | #endif |
07a93626 | 3225 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
aee80b54 | 3226 | case ARPHRD_IPGRE: |
3227 | addrconf_gre_config(dev); | |
3228 | break; | |
0be669bb | 3229 | #endif |
1da177e4 LT |
3230 | case ARPHRD_LOOPBACK: |
3231 | init_loopback(dev); | |
3232 | break; | |
3233 | ||
3234 | default: | |
3235 | addrconf_dev_config(dev); | |
3236 | break; | |
3ff50b79 | 3237 | } |
bcdd553f | 3238 | |
a317a2f1 | 3239 | if (!IS_ERR_OR_NULL(idev)) { |
c5e33bdd YH |
3240 | if (run_pending) |
3241 | addrconf_dad_run(idev); | |
3242 | ||
bcdd553f SH |
3243 | /* |
3244 | * If the MTU changed during the interface down, | |
3245 | * when the interface up, the changed MTU must be | |
3246 | * reflected in the idev as well as routers. | |
1da177e4 | 3247 | */ |
bcdd553f SH |
3248 | if (idev->cnf.mtu6 != dev->mtu && |
3249 | dev->mtu >= IPV6_MIN_MTU) { | |
1da177e4 LT |
3250 | rt6_mtu_change(dev, dev->mtu); |
3251 | idev->cnf.mtu6 = dev->mtu; | |
3252 | } | |
3253 | idev->tstamp = jiffies; | |
3254 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
bcdd553f SH |
3255 | |
3256 | /* | |
3257 | * If the changed mtu during down is lower than | |
3258 | * IPV6_MIN_MTU stop IPv6 on this interface. | |
1da177e4 LT |
3259 | */ |
3260 | if (dev->mtu < IPV6_MIN_MTU) | |
bcdd553f | 3261 | addrconf_ifdown(dev, 1); |
1da177e4 LT |
3262 | } |
3263 | break; | |
3264 | ||
1da177e4 LT |
3265 | case NETDEV_DOWN: |
3266 | case NETDEV_UNREGISTER: | |
3267 | /* | |
3268 | * Remove all addresses from this interface. | |
3269 | */ | |
3270 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
3271 | break; | |
3c21edbd | 3272 | |
1da177e4 | 3273 | case NETDEV_CHANGENAME: |
1da177e4 | 3274 | if (idev) { |
5632c515 | 3275 | snmp6_unregister_dev(idev); |
408c4768 | 3276 | addrconf_sysctl_unregister(idev); |
a317a2f1 | 3277 | err = addrconf_sysctl_register(idev); |
b217d616 HX |
3278 | if (err) |
3279 | return notifier_from_errno(err); | |
a317a2f1 WC |
3280 | err = snmp6_register_dev(idev); |
3281 | if (err) { | |
3282 | addrconf_sysctl_unregister(idev); | |
3283 | return notifier_from_errno(err); | |
3284 | } | |
5632c515 | 3285 | } |
1da177e4 | 3286 | break; |
bcdd553f | 3287 | |
93d9b7d7 JP |
3288 | case NETDEV_PRE_TYPE_CHANGE: |
3289 | case NETDEV_POST_TYPE_CHANGE: | |
3290 | addrconf_type_change(dev, event); | |
75c78500 | 3291 | break; |
3ff50b79 | 3292 | } |
1da177e4 LT |
3293 | |
3294 | return NOTIFY_OK; | |
3295 | } | |
3296 | ||
3297 | /* | |
3298 | * addrconf module should be notified of a device going up | |
3299 | */ | |
3300 | static struct notifier_block ipv6_dev_notf = { | |
3301 | .notifier_call = addrconf_notify, | |
1da177e4 LT |
3302 | }; |
3303 | ||
93d9b7d7 | 3304 | static void addrconf_type_change(struct net_device *dev, unsigned long event) |
75c78500 MS |
3305 | { |
3306 | struct inet6_dev *idev; | |
3307 | ASSERT_RTNL(); | |
3308 | ||
3309 | idev = __in6_dev_get(dev); | |
3310 | ||
93d9b7d7 | 3311 | if (event == NETDEV_POST_TYPE_CHANGE) |
75c78500 | 3312 | ipv6_mc_remap(idev); |
93d9b7d7 | 3313 | else if (event == NETDEV_PRE_TYPE_CHANGE) |
75c78500 MS |
3314 | ipv6_mc_unmap(idev); |
3315 | } | |
3316 | ||
1da177e4 LT |
3317 | static int addrconf_ifdown(struct net_device *dev, int how) |
3318 | { | |
c346dca1 | 3319 | struct net *net = dev_net(dev); |
502a2ffd | 3320 | struct inet6_dev *idev; |
3321 | struct inet6_ifaddr *ifa; | |
73a8bd74 | 3322 | int state, i; |
1da177e4 LT |
3323 | |
3324 | ASSERT_RTNL(); | |
3325 | ||
73a8bd74 DM |
3326 | rt6_ifdown(net, dev); |
3327 | neigh_ifdown(&nd_tbl, dev); | |
1da177e4 LT |
3328 | |
3329 | idev = __in6_dev_get(dev); | |
63159f29 | 3330 | if (!idev) |
1da177e4 LT |
3331 | return -ENODEV; |
3332 | ||
bcdd553f SH |
3333 | /* |
3334 | * Step 1: remove reference to ipv6 device from parent device. | |
3335 | * Do not dev_put! | |
1da177e4 | 3336 | */ |
439e2385 | 3337 | if (how) { |
1da177e4 | 3338 | idev->dead = 1; |
8814c4b5 YH |
3339 | |
3340 | /* protected by rtnl_lock */ | |
a9b3cd7f | 3341 | RCU_INIT_POINTER(dev->ip6_ptr, NULL); |
1da177e4 LT |
3342 | |
3343 | /* Step 1.5: remove snmp6 entry */ | |
3344 | snmp6_unregister_dev(idev); | |
3345 | ||
3346 | } | |
3347 | ||
73a8bd74 DM |
3348 | /* Step 2: clear hash table */ |
3349 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { | |
3350 | struct hlist_head *h = &inet6_addr_lst[i]; | |
73a8bd74 DM |
3351 | |
3352 | spin_lock_bh(&addrconf_hash_lock); | |
67ba4152 | 3353 | restart: |
b67bfe0d | 3354 | hlist_for_each_entry_rcu(ifa, h, addr_lst) { |
73a8bd74 DM |
3355 | if (ifa->idev == idev) { |
3356 | hlist_del_init_rcu(&ifa->addr_lst); | |
c15b1cca | 3357 | addrconf_del_dad_work(ifa); |
73a8bd74 DM |
3358 | goto restart; |
3359 | } | |
3360 | } | |
3361 | spin_unlock_bh(&addrconf_hash_lock); | |
3362 | } | |
3363 | ||
1da177e4 LT |
3364 | write_lock_bh(&idev->lock); |
3365 | ||
b7b1bfce HFS |
3366 | addrconf_del_rs_timer(idev); |
3367 | ||
bcdd553f | 3368 | /* Step 2: clear flags for stateless addrconf */ |
439e2385 | 3369 | if (!how) |
3c21edbd | 3370 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 | 3371 | |
439e2385 | 3372 | if (how && del_timer(&idev->regen_timer)) |
1da177e4 LT |
3373 | in6_dev_put(idev); |
3374 | ||
bcdd553f | 3375 | /* Step 3: clear tempaddr list */ |
372e6c8f | 3376 | while (!list_empty(&idev->tempaddr_list)) { |
3377 | ifa = list_first_entry(&idev->tempaddr_list, | |
3378 | struct inet6_ifaddr, tmp_list); | |
3379 | list_del(&ifa->tmp_list); | |
1da177e4 LT |
3380 | write_unlock_bh(&idev->lock); |
3381 | spin_lock_bh(&ifa->lock); | |
3382 | ||
3383 | if (ifa->ifpub) { | |
3384 | in6_ifa_put(ifa->ifpub); | |
3385 | ifa->ifpub = NULL; | |
3386 | } | |
3387 | spin_unlock_bh(&ifa->lock); | |
3388 | in6_ifa_put(ifa); | |
3389 | write_lock_bh(&idev->lock); | |
3390 | } | |
8f37ada5 | 3391 | |
502a2ffd | 3392 | while (!list_empty(&idev->addr_list)) { |
3393 | ifa = list_first_entry(&idev->addr_list, | |
3394 | struct inet6_ifaddr, if_list); | |
c15b1cca | 3395 | addrconf_del_dad_work(ifa); |
84e8b803 | 3396 | |
73a8bd74 | 3397 | list_del(&ifa->if_list); |
84e8b803 | 3398 | |
73a8bd74 | 3399 | write_unlock_bh(&idev->lock); |
84e8b803 | 3400 | |
8e8e676d | 3401 | spin_lock_bh(&ifa->lock); |
73a8bd74 DM |
3402 | state = ifa->state; |
3403 | ifa->state = INET6_IFADDR_STATE_DEAD; | |
8e8e676d | 3404 | spin_unlock_bh(&ifa->lock); |
9d82ca98 | 3405 | |
73a8bd74 DM |
3406 | if (state != INET6_IFADDR_STATE_DEAD) { |
3407 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
f88c91dd | 3408 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifa); |
27bdb2ab | 3409 | } |
73a8bd74 | 3410 | in6_ifa_put(ifa); |
8f37ada5 | 3411 | |
73a8bd74 DM |
3412 | write_lock_bh(&idev->lock); |
3413 | } | |
8f37ada5 | 3414 | |
1da177e4 LT |
3415 | write_unlock_bh(&idev->lock); |
3416 | ||
381f4dca SD |
3417 | /* Step 5: Discard anycast and multicast list */ |
3418 | if (how) { | |
3419 | ipv6_ac_destroy_dev(idev); | |
1da177e4 | 3420 | ipv6_mc_destroy_dev(idev); |
381f4dca | 3421 | } else { |
1da177e4 | 3422 | ipv6_mc_down(idev); |
381f4dca | 3423 | } |
1da177e4 | 3424 | |
1da177e4 | 3425 | idev->tstamp = jiffies; |
1ab1457c | 3426 | |
bcdd553f | 3427 | /* Last: Shot the device (if unregistered) */ |
439e2385 | 3428 | if (how) { |
408c4768 | 3429 | addrconf_sysctl_unregister(idev); |
1da177e4 LT |
3430 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
3431 | neigh_ifdown(&nd_tbl, dev); | |
3432 | in6_dev_put(idev); | |
3433 | } | |
3434 | return 0; | |
3435 | } | |
3436 | ||
3437 | static void addrconf_rs_timer(unsigned long data) | |
3438 | { | |
b7b1bfce | 3439 | struct inet6_dev *idev = (struct inet6_dev *)data; |
caf92bc4 | 3440 | struct net_device *dev = idev->dev; |
b7b1bfce | 3441 | struct in6_addr lladdr; |
1da177e4 | 3442 | |
b7b1bfce | 3443 | write_lock(&idev->lock); |
5b2a1953 | 3444 | if (idev->dead || !(idev->if_flags & IF_READY)) |
1da177e4 LT |
3445 | goto out; |
3446 | ||
9ba2add3 | 3447 | if (!ipv6_accept_ra(idev)) |
5b2a1953 | 3448 | goto out; |
3449 | ||
3450 | /* Announcement received after solicitation was sent */ | |
3451 | if (idev->if_flags & IF_RA_RCVD) | |
1da177e4 | 3452 | goto out; |
1da177e4 | 3453 | |
b7b1bfce | 3454 | if (idev->rs_probes++ < idev->cnf.rtr_solicits) { |
caf92bc4 CW |
3455 | write_unlock(&idev->lock); |
3456 | if (!ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) | |
3457 | ndisc_send_rs(dev, &lladdr, | |
b7b1bfce HFS |
3458 | &in6addr_linklocal_allrouters); |
3459 | else | |
caf92bc4 | 3460 | goto put; |
1da177e4 | 3461 | |
caf92bc4 | 3462 | write_lock(&idev->lock); |
b7b1bfce HFS |
3463 | /* The wait after the last probe can be shorter */ |
3464 | addrconf_mod_rs_timer(idev, (idev->rs_probes == | |
3465 | idev->cnf.rtr_solicits) ? | |
3466 | idev->cnf.rtr_solicit_delay : | |
3467 | idev->cnf.rtr_solicit_interval); | |
1da177e4 | 3468 | } else { |
1da177e4 LT |
3469 | /* |
3470 | * Note: we do not support deprecated "all on-link" | |
3471 | * assumption any longer. | |
3472 | */ | |
91df42be | 3473 | pr_debug("%s: no IPv6 routers present\n", idev->dev->name); |
1da177e4 LT |
3474 | } |
3475 | ||
3476 | out: | |
b7b1bfce | 3477 | write_unlock(&idev->lock); |
caf92bc4 | 3478 | put: |
b7b1bfce | 3479 | in6_dev_put(idev); |
1da177e4 LT |
3480 | } |
3481 | ||
3482 | /* | |
3483 | * Duplicate Address Detection | |
3484 | */ | |
3c21edbd YH |
3485 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
3486 | { | |
3487 | unsigned long rand_num; | |
3488 | struct inet6_dev *idev = ifp->idev; | |
3489 | ||
95c385b4 NH |
3490 | if (ifp->flags & IFA_F_OPTIMISTIC) |
3491 | rand_num = 0; | |
3492 | else | |
63862b5b | 3493 | rand_num = prandom_u32() % (idev->cnf.rtr_solicit_delay ? : 1); |
95c385b4 | 3494 | |
b7b1bfce | 3495 | ifp->dad_probes = idev->cnf.dad_transmits; |
c15b1cca | 3496 | addrconf_mod_dad_work(ifp, rand_num); |
3c21edbd YH |
3497 | } |
3498 | ||
c15b1cca | 3499 | static void addrconf_dad_begin(struct inet6_ifaddr *ifp) |
1da177e4 LT |
3500 | { |
3501 | struct inet6_dev *idev = ifp->idev; | |
3502 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
3503 | |
3504 | addrconf_join_solict(dev, &ifp->addr); | |
3505 | ||
63862b5b | 3506 | prandom_seed((__force u32) ifp->addr.s6_addr32[3]); |
1da177e4 LT |
3507 | |
3508 | read_lock_bh(&idev->lock); | |
622ccdf1 | 3509 | spin_lock(&ifp->lock); |
e9d3e084 | 3510 | if (ifp->state == INET6_IFADDR_STATE_DEAD) |
1da177e4 | 3511 | goto out; |
1da177e4 LT |
3512 | |
3513 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
1b34be74 | 3514 | idev->cnf.accept_dad < 1 || |
55ebaef1 NT |
3515 | !(ifp->flags&IFA_F_TENTATIVE) || |
3516 | ifp->flags & IFA_F_NODAD) { | |
cc411d0b | 3517 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 3518 | spin_unlock(&ifp->lock); |
1da177e4 LT |
3519 | read_unlock_bh(&idev->lock); |
3520 | ||
3521 | addrconf_dad_completed(ifp); | |
3522 | return; | |
3523 | } | |
3524 | ||
6732bade | 3525 | if (!(idev->if_flags & IF_READY)) { |
21809faf | 3526 | spin_unlock(&ifp->lock); |
6732bade | 3527 | read_unlock_bh(&idev->lock); |
3c21edbd | 3528 | /* |
590a9887 | 3529 | * If the device is not ready: |
3c21edbd YH |
3530 | * - keep it tentative if it is a permanent address. |
3531 | * - otherwise, kill it. | |
3532 | */ | |
3533 | in6_ifa_hold(ifp); | |
cc411d0b | 3534 | addrconf_dad_stop(ifp, 0); |
6732bade | 3535 | return; |
3c21edbd | 3536 | } |
95c385b4 NH |
3537 | |
3538 | /* | |
3539 | * Optimistic nodes can start receiving | |
3540 | * Frames right away | |
3541 | */ | |
7fd2561e | 3542 | if (ifp->flags & IFA_F_OPTIMISTIC) { |
95c385b4 | 3543 | ip6_ins_rt(ifp->rt); |
7fd2561e EK |
3544 | if (ipv6_use_optimistic_addr(idev)) { |
3545 | /* Because optimistic nodes can use this address, | |
3546 | * notify listeners. If DAD fails, RTM_DELADDR is sent. | |
3547 | */ | |
3548 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
3549 | } | |
3550 | } | |
95c385b4 | 3551 | |
6732bade | 3552 | addrconf_dad_kick(ifp); |
1da177e4 | 3553 | out: |
622ccdf1 | 3554 | spin_unlock(&ifp->lock); |
1da177e4 LT |
3555 | read_unlock_bh(&idev->lock); |
3556 | } | |
3557 | ||
c15b1cca | 3558 | static void addrconf_dad_start(struct inet6_ifaddr *ifp) |
1da177e4 | 3559 | { |
c15b1cca HFS |
3560 | bool begin_dad = false; |
3561 | ||
8e8e676d | 3562 | spin_lock_bh(&ifp->lock); |
c15b1cca HFS |
3563 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
3564 | ifp->state = INET6_IFADDR_STATE_PREDAD; | |
3565 | begin_dad = true; | |
3566 | } | |
8e8e676d | 3567 | spin_unlock_bh(&ifp->lock); |
c15b1cca HFS |
3568 | |
3569 | if (begin_dad) | |
3570 | addrconf_mod_dad_work(ifp, 0); | |
3571 | } | |
3572 | ||
3573 | static void addrconf_dad_work(struct work_struct *w) | |
3574 | { | |
3575 | struct inet6_ifaddr *ifp = container_of(to_delayed_work(w), | |
3576 | struct inet6_ifaddr, | |
3577 | dad_work); | |
1da177e4 | 3578 | struct inet6_dev *idev = ifp->idev; |
1da177e4 LT |
3579 | struct in6_addr mcaddr; |
3580 | ||
c15b1cca HFS |
3581 | enum { |
3582 | DAD_PROCESS, | |
3583 | DAD_BEGIN, | |
3584 | DAD_ABORT, | |
3585 | } action = DAD_PROCESS; | |
3586 | ||
3587 | rtnl_lock(); | |
3588 | ||
8e8e676d | 3589 | spin_lock_bh(&ifp->lock); |
c15b1cca HFS |
3590 | if (ifp->state == INET6_IFADDR_STATE_PREDAD) { |
3591 | action = DAD_BEGIN; | |
3592 | ifp->state = INET6_IFADDR_STATE_DAD; | |
3593 | } else if (ifp->state == INET6_IFADDR_STATE_ERRDAD) { | |
3594 | action = DAD_ABORT; | |
3595 | ifp->state = INET6_IFADDR_STATE_POSTDAD; | |
3596 | } | |
8e8e676d | 3597 | spin_unlock_bh(&ifp->lock); |
c15b1cca HFS |
3598 | |
3599 | if (action == DAD_BEGIN) { | |
3600 | addrconf_dad_begin(ifp); | |
3601 | goto out; | |
3602 | } else if (action == DAD_ABORT) { | |
3603 | addrconf_dad_stop(ifp, 1); | |
3604 | goto out; | |
3605 | } | |
3606 | ||
b7b1bfce | 3607 | if (!ifp->dad_probes && addrconf_dad_end(ifp)) |
f2344a13 HX |
3608 | goto out; |
3609 | ||
c15b1cca | 3610 | write_lock_bh(&idev->lock); |
122e4519 | 3611 | if (idev->dead || !(idev->if_flags & IF_READY)) { |
c15b1cca | 3612 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
3613 | goto out; |
3614 | } | |
21809faf | 3615 | |
3616 | spin_lock(&ifp->lock); | |
622ccdf1 HX |
3617 | if (ifp->state == INET6_IFADDR_STATE_DEAD) { |
3618 | spin_unlock(&ifp->lock); | |
c15b1cca | 3619 | write_unlock_bh(&idev->lock); |
622ccdf1 HX |
3620 | goto out; |
3621 | } | |
3622 | ||
b7b1bfce | 3623 | if (ifp->dad_probes == 0) { |
1da177e4 LT |
3624 | /* |
3625 | * DAD was successful | |
3626 | */ | |
3627 | ||
cc411d0b | 3628 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 3629 | spin_unlock(&ifp->lock); |
c15b1cca | 3630 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
3631 | |
3632 | addrconf_dad_completed(ifp); | |
3633 | ||
3634 | goto out; | |
3635 | } | |
3636 | ||
b7b1bfce | 3637 | ifp->dad_probes--; |
c15b1cca HFS |
3638 | addrconf_mod_dad_work(ifp, |
3639 | NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME)); | |
21809faf | 3640 | spin_unlock(&ifp->lock); |
c15b1cca | 3641 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
3642 | |
3643 | /* send a neighbour solicitation for our addr */ | |
1da177e4 | 3644 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
38cf595b | 3645 | ndisc_send_ns(ifp->idev->dev, &ifp->addr, &mcaddr, &in6addr_any, NULL); |
1da177e4 LT |
3646 | out: |
3647 | in6_ifa_put(ifp); | |
c15b1cca | 3648 | rtnl_unlock(); |
1da177e4 LT |
3649 | } |
3650 | ||
11ffff75 HFS |
3651 | /* ifp->idev must be at least read locked */ |
3652 | static bool ipv6_lonely_lladdr(struct inet6_ifaddr *ifp) | |
3653 | { | |
3654 | struct inet6_ifaddr *ifpiter; | |
3655 | struct inet6_dev *idev = ifp->idev; | |
3656 | ||
602582ca HFS |
3657 | list_for_each_entry_reverse(ifpiter, &idev->addr_list, if_list) { |
3658 | if (ifpiter->scope > IFA_LINK) | |
3659 | break; | |
11ffff75 HFS |
3660 | if (ifp != ifpiter && ifpiter->scope == IFA_LINK && |
3661 | (ifpiter->flags & (IFA_F_PERMANENT|IFA_F_TENTATIVE| | |
3662 | IFA_F_OPTIMISTIC|IFA_F_DADFAILED)) == | |
3663 | IFA_F_PERMANENT) | |
3664 | return false; | |
3665 | } | |
3666 | return true; | |
3667 | } | |
3668 | ||
1da177e4 LT |
3669 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) |
3670 | { | |
e21e8467 | 3671 | struct net_device *dev = ifp->idev->dev; |
b7b1bfce | 3672 | struct in6_addr lladdr; |
b173ee48 | 3673 | bool send_rs, send_mld; |
b7b1bfce | 3674 | |
c15b1cca | 3675 | addrconf_del_dad_work(ifp); |
1da177e4 LT |
3676 | |
3677 | /* | |
3678 | * Configure the address for reception. Now it is valid. | |
3679 | */ | |
3680 | ||
3681 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
3682 | ||
026359bc TA |
3683 | /* If added prefix is link local and we are prepared to process |
3684 | router advertisements, start sending router solicitations. | |
1da177e4 LT |
3685 | */ |
3686 | ||
1ec047eb | 3687 | read_lock_bh(&ifp->idev->lock); |
11ffff75 | 3688 | send_mld = ifp->scope == IFA_LINK && ipv6_lonely_lladdr(ifp); |
b173ee48 HFS |
3689 | send_rs = send_mld && |
3690 | ipv6_accept_ra(ifp->idev) && | |
1ec047eb | 3691 | ifp->idev->cnf.rtr_solicits > 0 && |
b173ee48 | 3692 | (dev->flags&IFF_LOOPBACK) == 0; |
1ec047eb HFS |
3693 | read_unlock_bh(&ifp->idev->lock); |
3694 | ||
b173ee48 HFS |
3695 | /* While dad is in progress mld report's source address is in6_addrany. |
3696 | * Resend with proper ll now. | |
3697 | */ | |
3698 | if (send_mld) | |
3699 | ipv6_mc_dad_complete(ifp->idev); | |
3700 | ||
1ec047eb | 3701 | if (send_rs) { |
1da177e4 LT |
3702 | /* |
3703 | * If a host as already performed a random delay | |
3704 | * [...] as part of DAD [...] there is no need | |
3705 | * to delay again before sending the first RS | |
3706 | */ | |
1ec047eb | 3707 | if (ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) |
b7b1bfce | 3708 | return; |
1ec047eb | 3709 | ndisc_send_rs(dev, &lladdr, &in6addr_linklocal_allrouters); |
1da177e4 | 3710 | |
b7b1bfce HFS |
3711 | write_lock_bh(&ifp->idev->lock); |
3712 | spin_lock(&ifp->lock); | |
3713 | ifp->idev->rs_probes = 1; | |
1da177e4 | 3714 | ifp->idev->if_flags |= IF_RS_SENT; |
b7b1bfce HFS |
3715 | addrconf_mod_rs_timer(ifp->idev, |
3716 | ifp->idev->cnf.rtr_solicit_interval); | |
3717 | spin_unlock(&ifp->lock); | |
3718 | write_unlock_bh(&ifp->idev->lock); | |
1da177e4 LT |
3719 | } |
3720 | } | |
3721 | ||
e21e8467 SH |
3722 | static void addrconf_dad_run(struct inet6_dev *idev) |
3723 | { | |
c5e33bdd YH |
3724 | struct inet6_ifaddr *ifp; |
3725 | ||
3726 | read_lock_bh(&idev->lock); | |
502a2ffd | 3727 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
21809faf | 3728 | spin_lock(&ifp->lock); |
f2344a13 HX |
3729 | if (ifp->flags & IFA_F_TENTATIVE && |
3730 | ifp->state == INET6_IFADDR_STATE_DAD) | |
3731 | addrconf_dad_kick(ifp); | |
21809faf | 3732 | spin_unlock(&ifp->lock); |
c5e33bdd YH |
3733 | } |
3734 | read_unlock_bh(&idev->lock); | |
3735 | } | |
3736 | ||
1da177e4 LT |
3737 | #ifdef CONFIG_PROC_FS |
3738 | struct if6_iter_state { | |
3c40090a | 3739 | struct seq_net_private p; |
1da177e4 | 3740 | int bucket; |
1d578303 | 3741 | int offset; |
1da177e4 LT |
3742 | }; |
3743 | ||
1d578303 | 3744 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos) |
1da177e4 LT |
3745 | { |
3746 | struct inet6_ifaddr *ifa = NULL; | |
3747 | struct if6_iter_state *state = seq->private; | |
1218854a | 3748 | struct net *net = seq_file_net(seq); |
1d578303 | 3749 | int p = 0; |
1da177e4 | 3750 | |
1d578303 MM |
3751 | /* initial bucket if pos is 0 */ |
3752 | if (pos == 0) { | |
3753 | state->bucket = 0; | |
3754 | state->offset = 0; | |
3755 | } | |
3756 | ||
3757 | for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
b67bfe0d | 3758 | hlist_for_each_entry_rcu_bh(ifa, &inet6_addr_lst[state->bucket], |
1d578303 | 3759 | addr_lst) { |
9f0d3c27 ED |
3760 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3761 | continue; | |
1d578303 MM |
3762 | /* sync with offset */ |
3763 | if (p < state->offset) { | |
3764 | p++; | |
3765 | continue; | |
3766 | } | |
3767 | state->offset++; | |
9f0d3c27 | 3768 | return ifa; |
1d578303 MM |
3769 | } |
3770 | ||
3771 | /* prepare for next bucket */ | |
3772 | state->offset = 0; | |
3773 | p = 0; | |
1da177e4 | 3774 | } |
c2e21293 | 3775 | return NULL; |
1da177e4 LT |
3776 | } |
3777 | ||
c2e21293 | 3778 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, |
3779 | struct inet6_ifaddr *ifa) | |
1da177e4 LT |
3780 | { |
3781 | struct if6_iter_state *state = seq->private; | |
1218854a | 3782 | struct net *net = seq_file_net(seq); |
1da177e4 | 3783 | |
b67bfe0d | 3784 | hlist_for_each_entry_continue_rcu_bh(ifa, addr_lst) { |
9f0d3c27 ED |
3785 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3786 | continue; | |
1d578303 | 3787 | state->offset++; |
9f0d3c27 | 3788 | return ifa; |
1d578303 | 3789 | } |
3c40090a | 3790 | |
c2e21293 | 3791 | while (++state->bucket < IN6_ADDR_HSIZE) { |
1d578303 | 3792 | state->offset = 0; |
b67bfe0d | 3793 | hlist_for_each_entry_rcu_bh(ifa, |
c2e21293 | 3794 | &inet6_addr_lst[state->bucket], addr_lst) { |
9f0d3c27 ED |
3795 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3796 | continue; | |
1d578303 | 3797 | state->offset++; |
9f0d3c27 | 3798 | return ifa; |
c2e21293 | 3799 | } |
1da177e4 | 3800 | } |
3c40090a | 3801 | |
c2e21293 | 3802 | return NULL; |
1da177e4 LT |
3803 | } |
3804 | ||
1da177e4 | 3805 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) |
4f70ecca | 3806 | __acquires(rcu_bh) |
1da177e4 | 3807 | { |
5c578aed | 3808 | rcu_read_lock_bh(); |
1d578303 | 3809 | return if6_get_first(seq, *pos); |
1da177e4 LT |
3810 | } |
3811 | ||
3812 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3813 | { | |
3814 | struct inet6_ifaddr *ifa; | |
3815 | ||
3816 | ifa = if6_get_next(seq, v); | |
3817 | ++*pos; | |
3818 | return ifa; | |
3819 | } | |
3820 | ||
3821 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
4f70ecca | 3822 | __releases(rcu_bh) |
1da177e4 | 3823 | { |
5c578aed | 3824 | rcu_read_unlock_bh(); |
1da177e4 LT |
3825 | } |
3826 | ||
3827 | static int if6_seq_show(struct seq_file *seq, void *v) | |
3828 | { | |
3829 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
971a351c | 3830 | seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", |
b071195d | 3831 | &ifp->addr, |
1da177e4 LT |
3832 | ifp->idev->dev->ifindex, |
3833 | ifp->prefix_len, | |
3834 | ifp->scope, | |
971a351c | 3835 | (u8) ifp->flags, |
1da177e4 LT |
3836 | ifp->idev->dev->name); |
3837 | return 0; | |
3838 | } | |
3839 | ||
56b3d975 | 3840 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
3841 | .start = if6_seq_start, |
3842 | .next = if6_seq_next, | |
3843 | .show = if6_seq_show, | |
3844 | .stop = if6_seq_stop, | |
3845 | }; | |
3846 | ||
3847 | static int if6_seq_open(struct inode *inode, struct file *file) | |
3848 | { | |
3c40090a DL |
3849 | return seq_open_net(inode, file, &if6_seq_ops, |
3850 | sizeof(struct if6_iter_state)); | |
1da177e4 LT |
3851 | } |
3852 | ||
9a32144e | 3853 | static const struct file_operations if6_fops = { |
1da177e4 LT |
3854 | .owner = THIS_MODULE, |
3855 | .open = if6_seq_open, | |
3856 | .read = seq_read, | |
3857 | .llseek = seq_lseek, | |
3c40090a | 3858 | .release = seq_release_net, |
1da177e4 LT |
3859 | }; |
3860 | ||
2c8c1e72 | 3861 | static int __net_init if6_proc_net_init(struct net *net) |
1da177e4 | 3862 | { |
d4beaa66 | 3863 | if (!proc_create("if_inet6", S_IRUGO, net->proc_net, &if6_fops)) |
1da177e4 LT |
3864 | return -ENOMEM; |
3865 | return 0; | |
3866 | } | |
3867 | ||
2c8c1e72 | 3868 | static void __net_exit if6_proc_net_exit(struct net *net) |
3c40090a | 3869 | { |
ece31ffd | 3870 | remove_proc_entry("if_inet6", net->proc_net); |
3c40090a DL |
3871 | } |
3872 | ||
3873 | static struct pernet_operations if6_proc_net_ops = { | |
67ba4152 IM |
3874 | .init = if6_proc_net_init, |
3875 | .exit = if6_proc_net_exit, | |
3c40090a DL |
3876 | }; |
3877 | ||
3878 | int __init if6_proc_init(void) | |
3879 | { | |
3880 | return register_pernet_subsys(&if6_proc_net_ops); | |
3881 | } | |
3882 | ||
1da177e4 LT |
3883 | void if6_proc_exit(void) |
3884 | { | |
3c40090a | 3885 | unregister_pernet_subsys(&if6_proc_net_ops); |
1da177e4 LT |
3886 | } |
3887 | #endif /* CONFIG_PROC_FS */ | |
3888 | ||
07a93626 | 3889 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
3b9f9a1c | 3890 | /* Check if address is a home address configured on any interface. */ |
b71d1d42 | 3891 | int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr) |
3b9f9a1c NT |
3892 | { |
3893 | int ret = 0; | |
c2e21293 | 3894 | struct inet6_ifaddr *ifp = NULL; |
ddbe5032 | 3895 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 3896 | |
5c578aed | 3897 | rcu_read_lock_bh(); |
b67bfe0d | 3898 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 3899 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
389f6612 | 3900 | continue; |
caad295f | 3901 | if (ipv6_addr_equal(&ifp->addr, addr) && |
3b9f9a1c NT |
3902 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
3903 | ret = 1; | |
3904 | break; | |
3905 | } | |
3906 | } | |
5c578aed | 3907 | rcu_read_unlock_bh(); |
3b9f9a1c NT |
3908 | return ret; |
3909 | } | |
3910 | #endif | |
3911 | ||
1da177e4 LT |
3912 | /* |
3913 | * Periodic address status verification | |
3914 | */ | |
3915 | ||
c15b1cca | 3916 | static void addrconf_verify_rtnl(void) |
1da177e4 | 3917 | { |
b2db7564 | 3918 | unsigned long now, next, next_sec, next_sched; |
1da177e4 | 3919 | struct inet6_ifaddr *ifp; |
1da177e4 LT |
3920 | int i; |
3921 | ||
c15b1cca HFS |
3922 | ASSERT_RTNL(); |
3923 | ||
5c578aed | 3924 | rcu_read_lock_bh(); |
1da177e4 | 3925 | now = jiffies; |
b2db7564 | 3926 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); |
1da177e4 | 3927 | |
c15b1cca | 3928 | cancel_delayed_work(&addr_chk_work); |
1da177e4 | 3929 | |
bcdd553f | 3930 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
1da177e4 | 3931 | restart: |
c15b1cca | 3932 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[i], addr_lst) { |
1da177e4 | 3933 | unsigned long age; |
1da177e4 | 3934 | |
fad8da3e YA |
3935 | /* When setting preferred_lft to a value not zero or |
3936 | * infinity, while valid_lft is infinity | |
3937 | * IFA_F_PERMANENT has a non-infinity life time. | |
3938 | */ | |
3939 | if ((ifp->flags & IFA_F_PERMANENT) && | |
3940 | (ifp->prefered_lft == INFINITY_LIFE_TIME)) | |
1da177e4 LT |
3941 | continue; |
3942 | ||
3943 | spin_lock(&ifp->lock); | |
b2db7564 YH |
3944 | /* We try to batch several events at once. */ |
3945 | age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; | |
1da177e4 | 3946 | |
8f27ebb9 YH |
3947 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
3948 | age >= ifp->valid_lft) { | |
1da177e4 LT |
3949 | spin_unlock(&ifp->lock); |
3950 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3951 | ipv6_del_addr(ifp); |
3952 | goto restart; | |
8f27ebb9 YH |
3953 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
3954 | spin_unlock(&ifp->lock); | |
3955 | continue; | |
1da177e4 | 3956 | } else if (age >= ifp->prefered_lft) { |
a1ed0526 | 3957 | /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ |
1da177e4 LT |
3958 | int deprecate = 0; |
3959 | ||
3960 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
3961 | deprecate = 1; | |
3962 | ifp->flags |= IFA_F_DEPRECATED; | |
3963 | } | |
3964 | ||
fad8da3e YA |
3965 | if ((ifp->valid_lft != INFINITY_LIFE_TIME) && |
3966 | (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))) | |
1da177e4 LT |
3967 | next = ifp->tstamp + ifp->valid_lft * HZ; |
3968 | ||
3969 | spin_unlock(&ifp->lock); | |
3970 | ||
3971 | if (deprecate) { | |
3972 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3973 | |
3974 | ipv6_ifa_notify(0, ifp); | |
3975 | in6_ifa_put(ifp); | |
3976 | goto restart; | |
3977 | } | |
1da177e4 LT |
3978 | } else if ((ifp->flags&IFA_F_TEMPORARY) && |
3979 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
88949cf4 | 3980 | unsigned long regen_advance = ifp->idev->cnf.regen_max_retry * |
3981 | ifp->idev->cnf.dad_transmits * | |
1f9248e5 | 3982 | NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME) / HZ; |
88949cf4 | 3983 | |
1da177e4 LT |
3984 | if (age >= ifp->prefered_lft - regen_advance) { |
3985 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
3986 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3987 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3988 | if (!ifp->regen_count && ifpub) { | |
3989 | ifp->regen_count++; | |
3990 | in6_ifa_hold(ifp); | |
3991 | in6_ifa_hold(ifpub); | |
3992 | spin_unlock(&ifp->lock); | |
5c578aed | 3993 | |
291d809b HY |
3994 | spin_lock(&ifpub->lock); |
3995 | ifpub->regen_count = 0; | |
3996 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
3997 | ipv6_create_tempaddr(ifpub, ifp); |
3998 | in6_ifa_put(ifpub); | |
3999 | in6_ifa_put(ifp); | |
4000 | goto restart; | |
4001 | } | |
4002 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
4003 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
4004 | spin_unlock(&ifp->lock); | |
1da177e4 LT |
4005 | } else { |
4006 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
4007 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
4008 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
4009 | spin_unlock(&ifp->lock); | |
4010 | } | |
4011 | } | |
1da177e4 LT |
4012 | } |
4013 | ||
b2db7564 YH |
4014 | next_sec = round_jiffies_up(next); |
4015 | next_sched = next; | |
4016 | ||
4017 | /* If rounded timeout is accurate enough, accept it. */ | |
4018 | if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) | |
4019 | next_sched = next_sec; | |
4020 | ||
4021 | /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ | |
4022 | if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX)) | |
4023 | next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX; | |
4024 | ||
ba3542e1 | 4025 | ADBG(KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n", |
4026 | now, next, next_sec, next_sched); | |
c15b1cca | 4027 | mod_delayed_work(addrconf_wq, &addr_chk_work, next_sched - now); |
5c578aed | 4028 | rcu_read_unlock_bh(); |
1da177e4 LT |
4029 | } |
4030 | ||
c15b1cca HFS |
4031 | static void addrconf_verify_work(struct work_struct *w) |
4032 | { | |
4033 | rtnl_lock(); | |
4034 | addrconf_verify_rtnl(); | |
4035 | rtnl_unlock(); | |
4036 | } | |
4037 | ||
4038 | static void addrconf_verify(void) | |
4039 | { | |
4040 | mod_delayed_work(addrconf_wq, &addr_chk_work, 0); | |
4041 | } | |
4042 | ||
caeaba79 ND |
4043 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local, |
4044 | struct in6_addr **peer_pfx) | |
461d8837 TG |
4045 | { |
4046 | struct in6_addr *pfx = NULL; | |
4047 | ||
caeaba79 ND |
4048 | *peer_pfx = NULL; |
4049 | ||
461d8837 TG |
4050 | if (addr) |
4051 | pfx = nla_data(addr); | |
4052 | ||
4053 | if (local) { | |
4054 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
caeaba79 ND |
4055 | *peer_pfx = pfx; |
4056 | pfx = nla_data(local); | |
461d8837 TG |
4057 | } |
4058 | ||
4059 | return pfx; | |
4060 | } | |
4061 | ||
ef7c79ed | 4062 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
4063 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
4064 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
4065 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
479840ff | 4066 | [IFA_FLAGS] = { .len = sizeof(u32) }, |
461d8837 TG |
4067 | }; |
4068 | ||
1da177e4 | 4069 | static int |
661d2967 | 4070 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 4071 | { |
3b1e0a65 | 4072 | struct net *net = sock_net(skb->sk); |
b933f716 TG |
4073 | struct ifaddrmsg *ifm; |
4074 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 4075 | struct in6_addr *pfx, *peer_pfx; |
6046d5b4 | 4076 | u32 ifa_flags; |
b933f716 | 4077 | int err; |
1da177e4 | 4078 | |
b933f716 TG |
4079 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
4080 | if (err < 0) | |
4081 | return err; | |
4082 | ||
4083 | ifm = nlmsg_data(nlh); | |
caeaba79 | 4084 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
63159f29 | 4085 | if (!pfx) |
1da177e4 LT |
4086 | return -EINVAL; |
4087 | ||
6046d5b4 HK |
4088 | ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags; |
4089 | ||
4090 | /* We ignore other flags so far. */ | |
4091 | ifa_flags &= IFA_F_MANAGETEMPADDR; | |
4092 | ||
4093 | return inet6_addr_del(net, ifm->ifa_index, ifa_flags, pfx, | |
4094 | ifm->ifa_prefixlen); | |
1da177e4 LT |
4095 | } |
4096 | ||
479840ff | 4097 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u32 ifa_flags, |
55ebaef1 | 4098 | u32 prefered_lft, u32 valid_lft) |
081bba5b | 4099 | { |
6f704992 YH |
4100 | u32 flags; |
4101 | clock_t expires; | |
4bed72e4 | 4102 | unsigned long timeout; |
53bd6749 | 4103 | bool was_managetempaddr; |
5b84efec | 4104 | bool had_prefixroute; |
46d48046 | 4105 | |
c15b1cca HFS |
4106 | ASSERT_RTNL(); |
4107 | ||
081bba5b NT |
4108 | if (!valid_lft || (prefered_lft > valid_lft)) |
4109 | return -EINVAL; | |
4110 | ||
53bd6749 JP |
4111 | if (ifa_flags & IFA_F_MANAGETEMPADDR && |
4112 | (ifp->flags & IFA_F_TEMPORARY || ifp->prefix_len != 64)) | |
4113 | return -EINVAL; | |
4114 | ||
4bed72e4 YH |
4115 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
4116 | if (addrconf_finite_timeout(timeout)) { | |
4117 | expires = jiffies_to_clock_t(timeout * HZ); | |
4118 | valid_lft = timeout; | |
6f704992 | 4119 | flags = RTF_EXPIRES; |
4bed72e4 YH |
4120 | } else { |
4121 | expires = 0; | |
4122 | flags = 0; | |
4123 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 4124 | } |
081bba5b | 4125 | |
4bed72e4 YH |
4126 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
4127 | if (addrconf_finite_timeout(timeout)) { | |
4128 | if (timeout == 0) | |
4129 | ifa_flags |= IFA_F_DEPRECATED; | |
4130 | prefered_lft = timeout; | |
4131 | } | |
081bba5b NT |
4132 | |
4133 | spin_lock_bh(&ifp->lock); | |
53bd6749 | 4134 | was_managetempaddr = ifp->flags & IFA_F_MANAGETEMPADDR; |
5b84efec TH |
4135 | had_prefixroute = ifp->flags & IFA_F_PERMANENT && |
4136 | !(ifp->flags & IFA_F_NOPREFIXROUTE); | |
53bd6749 | 4137 | ifp->flags &= ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | |
761aac73 TH |
4138 | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR | |
4139 | IFA_F_NOPREFIXROUTE); | |
53bd6749 | 4140 | ifp->flags |= ifa_flags; |
081bba5b NT |
4141 | ifp->tstamp = jiffies; |
4142 | ifp->valid_lft = valid_lft; | |
4143 | ifp->prefered_lft = prefered_lft; | |
4144 | ||
4145 | spin_unlock_bh(&ifp->lock); | |
4146 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
4147 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 4148 | |
761aac73 TH |
4149 | if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) { |
4150 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, | |
4151 | expires, flags); | |
5b84efec TH |
4152 | } else if (had_prefixroute) { |
4153 | enum cleanup_prefix_rt_t action; | |
4154 | unsigned long rt_expires; | |
4155 | ||
4156 | write_lock_bh(&ifp->idev->lock); | |
4157 | action = check_cleanup_prefix_route(ifp, &rt_expires); | |
4158 | write_unlock_bh(&ifp->idev->lock); | |
4159 | ||
4160 | if (action != CLEANUP_PREFIX_RT_NOP) { | |
4161 | cleanup_prefix_route(ifp, rt_expires, | |
4162 | action == CLEANUP_PREFIX_RT_DEL); | |
4163 | } | |
761aac73 | 4164 | } |
53bd6749 JP |
4165 | |
4166 | if (was_managetempaddr || ifp->flags & IFA_F_MANAGETEMPADDR) { | |
4167 | if (was_managetempaddr && !(ifp->flags & IFA_F_MANAGETEMPADDR)) | |
4168 | valid_lft = prefered_lft = 0; | |
4169 | manage_tempaddrs(ifp->idev, ifp, valid_lft, prefered_lft, | |
4170 | !was_managetempaddr, jiffies); | |
4171 | } | |
4172 | ||
c15b1cca | 4173 | addrconf_verify_rtnl(); |
081bba5b NT |
4174 | |
4175 | return 0; | |
4176 | } | |
4177 | ||
1da177e4 | 4178 | static int |
661d2967 | 4179 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 4180 | { |
3b1e0a65 | 4181 | struct net *net = sock_net(skb->sk); |
461d8837 TG |
4182 | struct ifaddrmsg *ifm; |
4183 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 4184 | struct in6_addr *pfx, *peer_pfx; |
7198f8ce TG |
4185 | struct inet6_ifaddr *ifa; |
4186 | struct net_device *dev; | |
55ebaef1 | 4187 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
479840ff | 4188 | u32 ifa_flags; |
461d8837 | 4189 | int err; |
1da177e4 | 4190 | |
461d8837 TG |
4191 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
4192 | if (err < 0) | |
4193 | return err; | |
4194 | ||
4195 | ifm = nlmsg_data(nlh); | |
caeaba79 | 4196 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
63159f29 | 4197 | if (!pfx) |
1da177e4 LT |
4198 | return -EINVAL; |
4199 | ||
461d8837 | 4200 | if (tb[IFA_CACHEINFO]) { |
0778769d | 4201 | struct ifa_cacheinfo *ci; |
461d8837 TG |
4202 | |
4203 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 4204 | valid_lft = ci->ifa_valid; |
461d8837 TG |
4205 | preferred_lft = ci->ifa_prefered; |
4206 | } else { | |
4207 | preferred_lft = INFINITY_LIFE_TIME; | |
4208 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
4209 | } |
4210 | ||
af284937 | 4211 | dev = __dev_get_by_index(net, ifm->ifa_index); |
63159f29 | 4212 | if (!dev) |
7198f8ce TG |
4213 | return -ENODEV; |
4214 | ||
479840ff JP |
4215 | ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags; |
4216 | ||
55ebaef1 | 4217 | /* We ignore other flags so far. */ |
761aac73 | 4218 | ifa_flags &= IFA_F_NODAD | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR | |
93a714d6 | 4219 | IFA_F_NOPREFIXROUTE | IFA_F_MCAUTOJOIN; |
55ebaef1 | 4220 | |
1cab3da6 | 4221 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
63159f29 | 4222 | if (!ifa) { |
7198f8ce TG |
4223 | /* |
4224 | * It would be best to check for !NLM_F_CREATE here but | |
db9c7c39 | 4225 | * userspace already relies on not having to provide this. |
7198f8ce | 4226 | */ |
caeaba79 | 4227 | return inet6_addr_add(net, ifm->ifa_index, pfx, peer_pfx, |
af284937 DL |
4228 | ifm->ifa_prefixlen, ifa_flags, |
4229 | preferred_lft, valid_lft); | |
081bba5b NT |
4230 | } |
4231 | ||
7198f8ce TG |
4232 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
4233 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
4234 | err = -EEXIST; | |
4235 | else | |
55ebaef1 | 4236 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
4237 | |
4238 | in6_ifa_put(ifa); | |
4239 | ||
4240 | return err; | |
1da177e4 LT |
4241 | } |
4242 | ||
479840ff | 4243 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u32 flags, |
101bb229 TG |
4244 | u8 scope, int ifindex) |
4245 | { | |
4246 | struct ifaddrmsg *ifm; | |
4247 | ||
4248 | ifm = nlmsg_data(nlh); | |
4249 | ifm->ifa_family = AF_INET6; | |
4250 | ifm->ifa_prefixlen = prefixlen; | |
4251 | ifm->ifa_flags = flags; | |
4252 | ifm->ifa_scope = scope; | |
4253 | ifm->ifa_index = ifindex; | |
4254 | } | |
4255 | ||
85486af0 TG |
4256 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
4257 | unsigned long tstamp, u32 preferred, u32 valid) | |
4258 | { | |
4259 | struct ifa_cacheinfo ci; | |
4260 | ||
18a31e1e TG |
4261 | ci.cstamp = cstamp_delta(cstamp); |
4262 | ci.tstamp = cstamp_delta(tstamp); | |
85486af0 TG |
4263 | ci.ifa_prefered = preferred; |
4264 | ci.ifa_valid = valid; | |
4265 | ||
4266 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
4267 | } | |
4268 | ||
101bb229 TG |
4269 | static inline int rt_scope(int ifa_scope) |
4270 | { | |
4271 | if (ifa_scope & IFA_HOST) | |
4272 | return RT_SCOPE_HOST; | |
4273 | else if (ifa_scope & IFA_LINK) | |
4274 | return RT_SCOPE_LINK; | |
4275 | else if (ifa_scope & IFA_SITE) | |
4276 | return RT_SCOPE_SITE; | |
4277 | else | |
4278 | return RT_SCOPE_UNIVERSE; | |
4279 | } | |
4280 | ||
0ab6803b TG |
4281 | static inline int inet6_ifaddr_msgsize(void) |
4282 | { | |
339bf98f | 4283 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
caeaba79 | 4284 | + nla_total_size(16) /* IFA_LOCAL */ |
339bf98f | 4285 | + nla_total_size(16) /* IFA_ADDRESS */ |
479840ff JP |
4286 | + nla_total_size(sizeof(struct ifa_cacheinfo)) |
4287 | + nla_total_size(4) /* IFA_FLAGS */; | |
0ab6803b | 4288 | } |
c5396a31 | 4289 | |
1da177e4 | 4290 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
15e47304 | 4291 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4292 | { |
1da177e4 | 4293 | struct nlmsghdr *nlh; |
85486af0 | 4294 | u32 preferred, valid; |
1da177e4 | 4295 | |
15e47304 | 4296 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
63159f29 | 4297 | if (!nlh) |
26932566 | 4298 | return -EMSGSIZE; |
0ab6803b | 4299 | |
101bb229 TG |
4300 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
4301 | ifa->idev->dev->ifindex); | |
4302 | ||
fad8da3e YA |
4303 | if (!((ifa->flags&IFA_F_PERMANENT) && |
4304 | (ifa->prefered_lft == INFINITY_LIFE_TIME))) { | |
85486af0 TG |
4305 | preferred = ifa->prefered_lft; |
4306 | valid = ifa->valid_lft; | |
4307 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 4308 | long tval = (jiffies - ifa->tstamp)/HZ; |
a1faa698 JR |
4309 | if (preferred > tval) |
4310 | preferred -= tval; | |
4311 | else | |
4312 | preferred = 0; | |
f56619fc BH |
4313 | if (valid != INFINITY_LIFE_TIME) { |
4314 | if (valid > tval) | |
4315 | valid -= tval; | |
4316 | else | |
4317 | valid = 0; | |
4318 | } | |
1da177e4 LT |
4319 | } |
4320 | } else { | |
85486af0 TG |
4321 | preferred = INFINITY_LIFE_TIME; |
4322 | valid = INFINITY_LIFE_TIME; | |
4323 | } | |
4324 | ||
7996c799 | 4325 | if (!ipv6_addr_any(&ifa->peer_addr)) { |
930345ea JB |
4326 | if (nla_put_in6_addr(skb, IFA_LOCAL, &ifa->addr) < 0 || |
4327 | nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->peer_addr) < 0) | |
caeaba79 ND |
4328 | goto error; |
4329 | } else | |
930345ea | 4330 | if (nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->addr) < 0) |
caeaba79 ND |
4331 | goto error; |
4332 | ||
4333 | if (put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) | |
4334 | goto error; | |
1da177e4 | 4335 | |
479840ff JP |
4336 | if (nla_put_u32(skb, IFA_FLAGS, ifa->flags) < 0) |
4337 | goto error; | |
4338 | ||
053c095a JB |
4339 | nlmsg_end(skb, nlh); |
4340 | return 0; | |
caeaba79 ND |
4341 | |
4342 | error: | |
4343 | nlmsg_cancel(skb, nlh); | |
4344 | return -EMSGSIZE; | |
1da177e4 LT |
4345 | } |
4346 | ||
4347 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
15e47304 | 4348 | u32 portid, u32 seq, int event, u16 flags) |
1da177e4 | 4349 | { |
1da177e4 | 4350 | struct nlmsghdr *nlh; |
101bb229 TG |
4351 | u8 scope = RT_SCOPE_UNIVERSE; |
4352 | int ifindex = ifmca->idev->dev->ifindex; | |
4353 | ||
4354 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
4355 | scope = RT_SCOPE_SITE; | |
1da177e4 | 4356 | |
15e47304 | 4357 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
63159f29 | 4358 | if (!nlh) |
26932566 | 4359 | return -EMSGSIZE; |
85486af0 | 4360 | |
0ab6803b | 4361 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
930345ea | 4362 | if (nla_put_in6_addr(skb, IFA_MULTICAST, &ifmca->mca_addr) < 0 || |
0ab6803b | 4363 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, |
26932566 PM |
4364 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
4365 | nlmsg_cancel(skb, nlh); | |
4366 | return -EMSGSIZE; | |
4367 | } | |
85486af0 | 4368 | |
053c095a JB |
4369 | nlmsg_end(skb, nlh); |
4370 | return 0; | |
1da177e4 LT |
4371 | } |
4372 | ||
4373 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
15e47304 | 4374 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4375 | { |
1da177e4 | 4376 | struct nlmsghdr *nlh; |
101bb229 TG |
4377 | u8 scope = RT_SCOPE_UNIVERSE; |
4378 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
4379 | ||
4380 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
4381 | scope = RT_SCOPE_SITE; | |
1da177e4 | 4382 | |
15e47304 | 4383 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
63159f29 | 4384 | if (!nlh) |
26932566 | 4385 | return -EMSGSIZE; |
85486af0 | 4386 | |
0ab6803b | 4387 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
930345ea | 4388 | if (nla_put_in6_addr(skb, IFA_ANYCAST, &ifaca->aca_addr) < 0 || |
0ab6803b | 4389 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, |
26932566 PM |
4390 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
4391 | nlmsg_cancel(skb, nlh); | |
4392 | return -EMSGSIZE; | |
4393 | } | |
1da177e4 | 4394 | |
053c095a JB |
4395 | nlmsg_end(skb, nlh); |
4396 | return 0; | |
1da177e4 LT |
4397 | } |
4398 | ||
e21e8467 | 4399 | enum addr_type_t { |
1da177e4 LT |
4400 | UNICAST_ADDR, |
4401 | MULTICAST_ADDR, | |
4402 | ANYCAST_ADDR, | |
4403 | }; | |
4404 | ||
234b27c3 ED |
4405 | /* called with rcu_read_lock() */ |
4406 | static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb, | |
4407 | struct netlink_callback *cb, enum addr_type_t type, | |
4408 | int s_ip_idx, int *p_ip_idx) | |
4409 | { | |
234b27c3 ED |
4410 | struct ifmcaddr6 *ifmca; |
4411 | struct ifacaddr6 *ifaca; | |
4412 | int err = 1; | |
4413 | int ip_idx = *p_ip_idx; | |
4414 | ||
4415 | read_lock_bh(&idev->lock); | |
4416 | switch (type) { | |
502a2ffd | 4417 | case UNICAST_ADDR: { |
4418 | struct inet6_ifaddr *ifa; | |
4419 | ||
234b27c3 | 4420 | /* unicast address incl. temp addr */ |
502a2ffd | 4421 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
4422 | if (++ip_idx < s_ip_idx) | |
234b27c3 ED |
4423 | continue; |
4424 | err = inet6_fill_ifaddr(skb, ifa, | |
15e47304 | 4425 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4426 | cb->nlh->nlmsg_seq, |
4427 | RTM_NEWADDR, | |
4428 | NLM_F_MULTI); | |
053c095a | 4429 | if (err < 0) |
234b27c3 | 4430 | break; |
63998ac2 | 4431 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
234b27c3 ED |
4432 | } |
4433 | break; | |
502a2ffd | 4434 | } |
234b27c3 ED |
4435 | case MULTICAST_ADDR: |
4436 | /* multicast address */ | |
4437 | for (ifmca = idev->mc_list; ifmca; | |
4438 | ifmca = ifmca->next, ip_idx++) { | |
4439 | if (ip_idx < s_ip_idx) | |
4440 | continue; | |
4441 | err = inet6_fill_ifmcaddr(skb, ifmca, | |
15e47304 | 4442 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4443 | cb->nlh->nlmsg_seq, |
4444 | RTM_GETMULTICAST, | |
4445 | NLM_F_MULTI); | |
053c095a | 4446 | if (err < 0) |
234b27c3 ED |
4447 | break; |
4448 | } | |
4449 | break; | |
4450 | case ANYCAST_ADDR: | |
4451 | /* anycast address */ | |
4452 | for (ifaca = idev->ac_list; ifaca; | |
4453 | ifaca = ifaca->aca_next, ip_idx++) { | |
4454 | if (ip_idx < s_ip_idx) | |
4455 | continue; | |
4456 | err = inet6_fill_ifacaddr(skb, ifaca, | |
15e47304 | 4457 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4458 | cb->nlh->nlmsg_seq, |
4459 | RTM_GETANYCAST, | |
4460 | NLM_F_MULTI); | |
053c095a | 4461 | if (err < 0) |
234b27c3 ED |
4462 | break; |
4463 | } | |
4464 | break; | |
4465 | default: | |
4466 | break; | |
4467 | } | |
4468 | read_unlock_bh(&idev->lock); | |
4469 | *p_ip_idx = ip_idx; | |
4470 | return err; | |
4471 | } | |
4472 | ||
1da177e4 LT |
4473 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, |
4474 | enum addr_type_t type) | |
4475 | { | |
234b27c3 ED |
4476 | struct net *net = sock_net(skb->sk); |
4477 | int h, s_h; | |
1da177e4 LT |
4478 | int idx, ip_idx; |
4479 | int s_idx, s_ip_idx; | |
1da177e4 | 4480 | struct net_device *dev; |
234b27c3 ED |
4481 | struct inet6_dev *idev; |
4482 | struct hlist_head *head; | |
1ab1457c | 4483 | |
234b27c3 ED |
4484 | s_h = cb->args[0]; |
4485 | s_idx = idx = cb->args[1]; | |
4486 | s_ip_idx = ip_idx = cb->args[2]; | |
5d5619b4 | 4487 | |
234b27c3 | 4488 | rcu_read_lock(); |
63998ac2 | 4489 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ net->dev_base_seq; |
234b27c3 ED |
4490 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
4491 | idx = 0; | |
4492 | head = &net->dev_index_head[h]; | |
b67bfe0d | 4493 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
234b27c3 ED |
4494 | if (idx < s_idx) |
4495 | goto cont; | |
4b97efdf | 4496 | if (h > s_h || idx > s_idx) |
234b27c3 ED |
4497 | s_ip_idx = 0; |
4498 | ip_idx = 0; | |
e21e8467 SH |
4499 | idev = __in6_dev_get(dev); |
4500 | if (!idev) | |
234b27c3 ED |
4501 | goto cont; |
4502 | ||
4503 | if (in6_dump_addrs(idev, skb, cb, type, | |
7b46a644 | 4504 | s_ip_idx, &ip_idx) < 0) |
234b27c3 | 4505 | goto done; |
7562f876 | 4506 | cont: |
234b27c3 ED |
4507 | idx++; |
4508 | } | |
1da177e4 | 4509 | } |
234b27c3 ED |
4510 | done: |
4511 | rcu_read_unlock(); | |
4512 | cb->args[0] = h; | |
4513 | cb->args[1] = idx; | |
4514 | cb->args[2] = ip_idx; | |
4515 | ||
1da177e4 LT |
4516 | return skb->len; |
4517 | } | |
4518 | ||
4519 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4520 | { | |
4521 | enum addr_type_t type = UNICAST_ADDR; | |
b854272b | 4522 | |
1da177e4 LT |
4523 | return inet6_dump_addr(skb, cb, type); |
4524 | } | |
4525 | ||
4526 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4527 | { | |
4528 | enum addr_type_t type = MULTICAST_ADDR; | |
b854272b | 4529 | |
1da177e4 LT |
4530 | return inet6_dump_addr(skb, cb, type); |
4531 | } | |
4532 | ||
4533 | ||
4534 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4535 | { | |
4536 | enum addr_type_t type = ANYCAST_ADDR; | |
b854272b | 4537 | |
1da177e4 LT |
4538 | return inet6_dump_addr(skb, cb, type); |
4539 | } | |
4540 | ||
661d2967 | 4541 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh) |
6c223828 | 4542 | { |
3b1e0a65 | 4543 | struct net *net = sock_net(in_skb->sk); |
1b29fc2c TG |
4544 | struct ifaddrmsg *ifm; |
4545 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 4546 | struct in6_addr *addr = NULL, *peer; |
6c223828 NT |
4547 | struct net_device *dev = NULL; |
4548 | struct inet6_ifaddr *ifa; | |
4549 | struct sk_buff *skb; | |
6c223828 NT |
4550 | int err; |
4551 | ||
1b29fc2c TG |
4552 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
4553 | if (err < 0) | |
4554 | goto errout; | |
4555 | ||
caeaba79 | 4556 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer); |
63159f29 | 4557 | if (!addr) { |
1b29fc2c TG |
4558 | err = -EINVAL; |
4559 | goto errout; | |
6c223828 | 4560 | } |
6c223828 | 4561 | |
1b29fc2c | 4562 | ifm = nlmsg_data(nlh); |
6c223828 | 4563 | if (ifm->ifa_index) |
6fda7350 | 4564 | dev = __dev_get_by_index(net, ifm->ifa_index); |
6c223828 | 4565 | |
e21e8467 SH |
4566 | ifa = ipv6_get_ifaddr(net, addr, dev, 1); |
4567 | if (!ifa) { | |
1b29fc2c TG |
4568 | err = -EADDRNOTAVAIL; |
4569 | goto errout; | |
4570 | } | |
6c223828 | 4571 | |
e21e8467 SH |
4572 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL); |
4573 | if (!skb) { | |
6c223828 | 4574 | err = -ENOBUFS; |
1b29fc2c | 4575 | goto errout_ifa; |
6c223828 NT |
4576 | } |
4577 | ||
15e47304 | 4578 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).portid, |
6c223828 | 4579 | nlh->nlmsg_seq, RTM_NEWADDR, 0); |
26932566 PM |
4580 | if (err < 0) { |
4581 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
4582 | WARN_ON(err == -EMSGSIZE); | |
4583 | kfree_skb(skb); | |
4584 | goto errout_ifa; | |
4585 | } | |
15e47304 | 4586 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); |
1b29fc2c | 4587 | errout_ifa: |
6c223828 | 4588 | in6_ifa_put(ifa); |
1b29fc2c | 4589 | errout: |
6c223828 | 4590 | return err; |
6c223828 NT |
4591 | } |
4592 | ||
1da177e4 LT |
4593 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
4594 | { | |
4595 | struct sk_buff *skb; | |
c346dca1 | 4596 | struct net *net = dev_net(ifa->idev->dev); |
5d620266 | 4597 | int err = -ENOBUFS; |
1da177e4 | 4598 | |
0ab6803b | 4599 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
63159f29 | 4600 | if (!skb) |
5d620266 TG |
4601 | goto errout; |
4602 | ||
4603 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
4604 | if (err < 0) { |
4605 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
4606 | WARN_ON(err == -EMSGSIZE); | |
4607 | kfree_skb(skb); | |
4608 | goto errout; | |
4609 | } | |
1ce85fe4 PNA |
4610 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
4611 | return; | |
5d620266 TG |
4612 | errout: |
4613 | if (err < 0) | |
6fda7350 | 4614 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
4615 | } |
4616 | ||
b6f99a21 | 4617 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
4618 | __s32 *array, int bytes) |
4619 | { | |
04561c1f TG |
4620 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
4621 | ||
1da177e4 LT |
4622 | memset(array, 0, bytes); |
4623 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
4624 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
4625 | array[DEVCONF_MTU6] = cnf->mtu6; | |
4626 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
4627 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
4628 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
4629 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
4630 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
93908d19 TG |
4631 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = |
4632 | jiffies_to_msecs(cnf->rtr_solicit_interval); | |
4633 | array[DEVCONF_RTR_SOLICIT_DELAY] = | |
4634 | jiffies_to_msecs(cnf->rtr_solicit_delay); | |
1da177e4 | 4635 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; |
fc4eba58 HFS |
4636 | array[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL] = |
4637 | jiffies_to_msecs(cnf->mldv1_unsolicited_report_interval); | |
4638 | array[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL] = | |
4639 | jiffies_to_msecs(cnf->mldv2_unsolicited_report_interval); | |
1da177e4 LT |
4640 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; |
4641 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
4642 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
4643 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
4644 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
1da177e4 | 4645 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; |
65f5c7c1 | 4646 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
8013d1d7 | 4647 | array[DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT] = cnf->accept_ra_min_hop_limit; |
c4fd30eb | 4648 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
4649 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4650 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
93908d19 TG |
4651 | array[DEVCONF_RTR_PROBE_INTERVAL] = |
4652 | jiffies_to_msecs(cnf->rtr_probe_interval); | |
fa03ef38 | 4653 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
4654 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
4655 | #endif | |
930d6ff2 | 4656 | #endif |
fbea49e1 | 4657 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 4658 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
4659 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4660 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
7fd2561e | 4661 | array[DEVCONF_USE_OPTIMISTIC] = cnf->use_optimistic; |
95c385b4 | 4662 | #endif |
7bc570c8 YH |
4663 | #ifdef CONFIG_IPV6_MROUTE |
4664 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; | |
4665 | #endif | |
778d80be | 4666 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
1b34be74 | 4667 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
c3faca05 | 4668 | array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao; |
5cb04436 | 4669 | array[DEVCONF_NDISC_NOTIFY] = cnf->ndisc_notify; |
b800c3b9 | 4670 | array[DEVCONF_SUPPRESS_FRAG_NDISC] = cnf->suppress_frag_ndisc; |
d9333196 | 4671 | array[DEVCONF_ACCEPT_RA_FROM_LOCAL] = cnf->accept_ra_from_local; |
c2943f14 | 4672 | array[DEVCONF_ACCEPT_RA_MTU] = cnf->accept_ra_mtu; |
35103d11 | 4673 | array[DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN] = cnf->ignore_routes_with_linkdown; |
3d1bec99 | 4674 | /* we omit DEVCONF_STABLE_SECRET for now */ |
3985e8a3 | 4675 | array[DEVCONF_USE_OIF_ADDRS_ONLY] = cnf->use_oif_addrs_only; |
1da177e4 LT |
4676 | } |
4677 | ||
b382b191 TG |
4678 | static inline size_t inet6_ifla6_size(void) |
4679 | { | |
4680 | return nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
4681 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
4682 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
4683 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ | |
f53adae4 DB |
4684 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ |
4685 | + nla_total_size(sizeof(struct in6_addr)); /* IFLA_INET6_TOKEN */ | |
b382b191 TG |
4686 | } |
4687 | ||
339bf98f TG |
4688 | static inline size_t inet6_if_nlmsg_size(void) |
4689 | { | |
4690 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
4691 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
4692 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
4693 | + nla_total_size(4) /* IFLA_MTU */ | |
4694 | + nla_total_size(4) /* IFLA_LINK */ | |
0344338b | 4695 | + nla_total_size(1) /* IFLA_OPERSTATE */ |
b382b191 | 4696 | + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */ |
339bf98f | 4697 | } |
c5396a31 | 4698 | |
be281e55 | 4699 | static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib, |
7d720c3e | 4700 | int items, int bytes) |
7f7d9a6b HX |
4701 | { |
4702 | int i; | |
4703 | int pad = bytes - sizeof(u64) * items; | |
4704 | BUG_ON(pad < 0); | |
4705 | ||
4706 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
4707 | put_unaligned(items, &stats[0]); | |
4708 | for (i = 1; i < items; i++) | |
be281e55 | 4709 | put_unaligned(atomic_long_read(&mib[i]), &stats[i]); |
7f7d9a6b HX |
4710 | |
4711 | memset(&stats[items], 0, pad); | |
4712 | } | |
4713 | ||
698365fa | 4714 | static inline void __snmp6_fill_stats64(u64 *stats, void __percpu *mib, |
a3a77372 | 4715 | int bytes, size_t syncpoff) |
4ce3c183 | 4716 | { |
a3a77372 R |
4717 | int i, c; |
4718 | u64 buff[IPSTATS_MIB_MAX]; | |
4719 | int pad = bytes - sizeof(u64) * IPSTATS_MIB_MAX; | |
4720 | ||
4ce3c183 ED |
4721 | BUG_ON(pad < 0); |
4722 | ||
a3a77372 R |
4723 | memset(buff, 0, sizeof(buff)); |
4724 | buff[0] = IPSTATS_MIB_MAX; | |
4ce3c183 | 4725 | |
a3a77372 R |
4726 | for_each_possible_cpu(c) { |
4727 | for (i = 1; i < IPSTATS_MIB_MAX; i++) | |
4728 | buff[i] += snmp_get_cpu_field64(mib, c, i, syncpoff); | |
4729 | } | |
4730 | ||
4731 | memcpy(stats, buff, IPSTATS_MIB_MAX * sizeof(u64)); | |
4732 | memset(&stats[IPSTATS_MIB_MAX], 0, pad); | |
4ce3c183 ED |
4733 | } |
4734 | ||
7f7d9a6b HX |
4735 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, |
4736 | int bytes) | |
4737 | { | |
e21e8467 | 4738 | switch (attrtype) { |
7f7d9a6b | 4739 | case IFLA_INET6_STATS: |
a3a77372 R |
4740 | __snmp6_fill_stats64(stats, idev->stats.ipv6, bytes, |
4741 | offsetof(struct ipstats_mib, syncp)); | |
7f7d9a6b HX |
4742 | break; |
4743 | case IFLA_INET6_ICMP6STATS: | |
be281e55 | 4744 | __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, ICMP6_MIB_MAX, bytes); |
7f7d9a6b HX |
4745 | break; |
4746 | } | |
4747 | } | |
4748 | ||
d5566fd7 SV |
4749 | static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev, |
4750 | u32 ext_filter_mask) | |
b382b191 TG |
4751 | { |
4752 | struct nlattr *nla; | |
4753 | struct ifla_cacheinfo ci; | |
4754 | ||
c78679e8 DM |
4755 | if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags)) |
4756 | goto nla_put_failure; | |
b382b191 | 4757 | ci.max_reasm_len = IPV6_MAXPLEN; |
24912420 DM |
4758 | ci.tstamp = cstamp_delta(idev->tstamp); |
4759 | ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time); | |
1f9248e5 | 4760 | ci.retrans_time = jiffies_to_msecs(NEIGH_VAR(idev->nd_parms, RETRANS_TIME)); |
c78679e8 DM |
4761 | if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci)) |
4762 | goto nla_put_failure; | |
b382b191 | 4763 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
63159f29 | 4764 | if (!nla) |
b382b191 TG |
4765 | goto nla_put_failure; |
4766 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); | |
4767 | ||
4768 | /* XXX - MC not implemented */ | |
4769 | ||
d5566fd7 SV |
4770 | if (ext_filter_mask & RTEXT_FILTER_SKIP_STATS) |
4771 | return 0; | |
4772 | ||
b382b191 | 4773 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); |
63159f29 | 4774 | if (!nla) |
b382b191 TG |
4775 | goto nla_put_failure; |
4776 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
4777 | ||
4778 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
63159f29 | 4779 | if (!nla) |
b382b191 TG |
4780 | goto nla_put_failure; |
4781 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
4782 | ||
f53adae4 | 4783 | nla = nla_reserve(skb, IFLA_INET6_TOKEN, sizeof(struct in6_addr)); |
63159f29 | 4784 | if (!nla) |
f53adae4 | 4785 | goto nla_put_failure; |
bc91b0f0 JP |
4786 | |
4787 | if (nla_put_u8(skb, IFLA_INET6_ADDR_GEN_MODE, idev->addr_gen_mode)) | |
4788 | goto nla_put_failure; | |
4789 | ||
f53adae4 DB |
4790 | read_lock_bh(&idev->lock); |
4791 | memcpy(nla_data(nla), idev->token.s6_addr, nla_len(nla)); | |
4792 | read_unlock_bh(&idev->lock); | |
4793 | ||
b382b191 TG |
4794 | return 0; |
4795 | ||
4796 | nla_put_failure: | |
4797 | return -EMSGSIZE; | |
4798 | } | |
4799 | ||
b1974ed0 AR |
4800 | static size_t inet6_get_link_af_size(const struct net_device *dev, |
4801 | u32 ext_filter_mask) | |
b382b191 TG |
4802 | { |
4803 | if (!__in6_dev_get(dev)) | |
4804 | return 0; | |
4805 | ||
4806 | return inet6_ifla6_size(); | |
4807 | } | |
4808 | ||
d5566fd7 SV |
4809 | static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev, |
4810 | u32 ext_filter_mask) | |
b382b191 TG |
4811 | { |
4812 | struct inet6_dev *idev = __in6_dev_get(dev); | |
4813 | ||
4814 | if (!idev) | |
4815 | return -ENODATA; | |
4816 | ||
d5566fd7 | 4817 | if (inet6_fill_ifla6_attrs(skb, idev, ext_filter_mask) < 0) |
b382b191 TG |
4818 | return -EMSGSIZE; |
4819 | ||
4820 | return 0; | |
4821 | } | |
4822 | ||
f53adae4 DB |
4823 | static int inet6_set_iftoken(struct inet6_dev *idev, struct in6_addr *token) |
4824 | { | |
f53adae4 DB |
4825 | struct inet6_ifaddr *ifp; |
4826 | struct net_device *dev = idev->dev; | |
fc403832 | 4827 | bool update_rs = false; |
dc848292 | 4828 | struct in6_addr ll_addr; |
f53adae4 | 4829 | |
c15b1cca HFS |
4830 | ASSERT_RTNL(); |
4831 | ||
63159f29 | 4832 | if (!token) |
f53adae4 DB |
4833 | return -EINVAL; |
4834 | if (ipv6_addr_any(token)) | |
4835 | return -EINVAL; | |
4836 | if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) | |
4837 | return -EINVAL; | |
f53adae4 DB |
4838 | if (!ipv6_accept_ra(idev)) |
4839 | return -EINVAL; | |
4840 | if (idev->cnf.rtr_solicits <= 0) | |
4841 | return -EINVAL; | |
4842 | ||
4843 | write_lock_bh(&idev->lock); | |
4844 | ||
4845 | BUILD_BUG_ON(sizeof(token->s6_addr) != 16); | |
4846 | memcpy(idev->token.s6_addr + 8, token->s6_addr + 8, 8); | |
4847 | ||
4848 | write_unlock_bh(&idev->lock); | |
4849 | ||
dc848292 HFS |
4850 | if (!idev->dead && (idev->if_flags & IF_READY) && |
4851 | !ipv6_get_lladdr(dev, &ll_addr, IFA_F_TENTATIVE | | |
4852 | IFA_F_OPTIMISTIC)) { | |
fc403832 DB |
4853 | |
4854 | /* If we're not ready, then normal ifup will take care | |
4855 | * of this. Otherwise, we need to request our rs here. | |
4856 | */ | |
4857 | ndisc_send_rs(dev, &ll_addr, &in6addr_linklocal_allrouters); | |
4858 | update_rs = true; | |
4859 | } | |
f53adae4 DB |
4860 | |
4861 | write_lock_bh(&idev->lock); | |
fc403832 | 4862 | |
77ecaace | 4863 | if (update_rs) { |
fc403832 | 4864 | idev->if_flags |= IF_RS_SENT; |
77ecaace HFS |
4865 | idev->rs_probes = 1; |
4866 | addrconf_mod_rs_timer(idev, idev->cnf.rtr_solicit_interval); | |
4867 | } | |
f53adae4 DB |
4868 | |
4869 | /* Well, that's kinda nasty ... */ | |
4870 | list_for_each_entry(ifp, &idev->addr_list, if_list) { | |
4871 | spin_lock(&ifp->lock); | |
617fe29d | 4872 | if (ifp->tokenized) { |
f53adae4 DB |
4873 | ifp->valid_lft = 0; |
4874 | ifp->prefered_lft = 0; | |
4875 | } | |
4876 | spin_unlock(&ifp->lock); | |
4877 | } | |
4878 | ||
4879 | write_unlock_bh(&idev->lock); | |
b2ed64a9 | 4880 | inet6_ifinfo_notify(RTM_NEWLINK, idev); |
c15b1cca | 4881 | addrconf_verify_rtnl(); |
f53adae4 DB |
4882 | return 0; |
4883 | } | |
4884 | ||
11b1f828 DB |
4885 | static const struct nla_policy inet6_af_policy[IFLA_INET6_MAX + 1] = { |
4886 | [IFLA_INET6_ADDR_GEN_MODE] = { .type = NLA_U8 }, | |
4887 | [IFLA_INET6_TOKEN] = { .len = sizeof(struct in6_addr) }, | |
4888 | }; | |
4889 | ||
4890 | static int inet6_validate_link_af(const struct net_device *dev, | |
4891 | const struct nlattr *nla) | |
4892 | { | |
4893 | struct nlattr *tb[IFLA_INET6_MAX + 1]; | |
4894 | ||
4895 | if (dev && !__in6_dev_get(dev)) | |
4896 | return -EAFNOSUPPORT; | |
4897 | ||
4898 | return nla_parse_nested(tb, IFLA_INET6_MAX, nla, inet6_af_policy); | |
4899 | } | |
4900 | ||
f53adae4 DB |
4901 | static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla) |
4902 | { | |
4903 | int err = -EINVAL; | |
4904 | struct inet6_dev *idev = __in6_dev_get(dev); | |
4905 | struct nlattr *tb[IFLA_INET6_MAX + 1]; | |
4906 | ||
4907 | if (!idev) | |
4908 | return -EAFNOSUPPORT; | |
4909 | ||
4910 | if (nla_parse_nested(tb, IFLA_INET6_MAX, nla, NULL) < 0) | |
4911 | BUG(); | |
4912 | ||
bc91b0f0 | 4913 | if (tb[IFLA_INET6_TOKEN]) { |
f53adae4 | 4914 | err = inet6_set_iftoken(idev, nla_data(tb[IFLA_INET6_TOKEN])); |
bc91b0f0 JP |
4915 | if (err) |
4916 | return err; | |
4917 | } | |
4918 | ||
4919 | if (tb[IFLA_INET6_ADDR_GEN_MODE]) { | |
4920 | u8 mode = nla_get_u8(tb[IFLA_INET6_ADDR_GEN_MODE]); | |
4921 | ||
4922 | if (mode != IN6_ADDR_GEN_MODE_EUI64 && | |
622c81d5 HFS |
4923 | mode != IN6_ADDR_GEN_MODE_NONE && |
4924 | mode != IN6_ADDR_GEN_MODE_STABLE_PRIVACY) | |
4925 | return -EINVAL; | |
4926 | ||
4927 | if (mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY && | |
4928 | !idev->cnf.stable_secret.initialized && | |
4929 | !dev_net(dev)->ipv6.devconf_dflt->stable_secret.initialized) | |
bc91b0f0 | 4930 | return -EINVAL; |
622c81d5 | 4931 | |
bc91b0f0 JP |
4932 | idev->addr_gen_mode = mode; |
4933 | err = 0; | |
4934 | } | |
f53adae4 DB |
4935 | |
4936 | return err; | |
4937 | } | |
4938 | ||
1ab1457c | 4939 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 4940 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4941 | { |
04561c1f | 4942 | struct net_device *dev = idev->dev; |
04561c1f TG |
4943 | struct ifinfomsg *hdr; |
4944 | struct nlmsghdr *nlh; | |
4945 | void *protoinfo; | |
04561c1f | 4946 | |
15e47304 | 4947 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*hdr), flags); |
63159f29 | 4948 | if (!nlh) |
26932566 | 4949 | return -EMSGSIZE; |
04561c1f TG |
4950 | |
4951 | hdr = nlmsg_data(nlh); | |
4952 | hdr->ifi_family = AF_INET6; | |
4953 | hdr->__ifi_pad = 0; | |
4954 | hdr->ifi_type = dev->type; | |
4955 | hdr->ifi_index = dev->ifindex; | |
4956 | hdr->ifi_flags = dev_get_flags(dev); | |
4957 | hdr->ifi_change = 0; | |
4958 | ||
c78679e8 DM |
4959 | if (nla_put_string(skb, IFLA_IFNAME, dev->name) || |
4960 | (dev->addr_len && | |
4961 | nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || | |
4962 | nla_put_u32(skb, IFLA_MTU, dev->mtu) || | |
a54acb3a | 4963 | (dev->ifindex != dev_get_iflink(dev) && |
0344338b AG |
4964 | nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) || |
4965 | nla_put_u8(skb, IFLA_OPERSTATE, | |
4966 | netif_running(dev) ? dev->operstate : IF_OPER_DOWN)) | |
c78679e8 | 4967 | goto nla_put_failure; |
04561c1f | 4968 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
63159f29 | 4969 | if (!protoinfo) |
04561c1f | 4970 | goto nla_put_failure; |
1da177e4 | 4971 | |
d5566fd7 | 4972 | if (inet6_fill_ifla6_attrs(skb, idev, 0) < 0) |
bf99f1bd | 4973 | goto nla_put_failure; |
1da177e4 | 4974 | |
04561c1f | 4975 | nla_nest_end(skb, protoinfo); |
053c095a JB |
4976 | nlmsg_end(skb, nlh); |
4977 | return 0; | |
1da177e4 | 4978 | |
04561c1f | 4979 | nla_put_failure: |
26932566 PM |
4980 | nlmsg_cancel(skb, nlh); |
4981 | return -EMSGSIZE; | |
1da177e4 LT |
4982 | } |
4983 | ||
4984 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
4985 | { | |
3b1e0a65 | 4986 | struct net *net = sock_net(skb->sk); |
84d2697d | 4987 | int h, s_h; |
434a8a58 | 4988 | int idx = 0, s_idx; |
1da177e4 LT |
4989 | struct net_device *dev; |
4990 | struct inet6_dev *idev; | |
84d2697d | 4991 | struct hlist_head *head; |
1da177e4 | 4992 | |
84d2697d ED |
4993 | s_h = cb->args[0]; |
4994 | s_idx = cb->args[1]; | |
4995 | ||
4996 | rcu_read_lock(); | |
4997 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
4998 | idx = 0; | |
4999 | head = &net->dev_index_head[h]; | |
b67bfe0d | 5000 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
84d2697d ED |
5001 | if (idx < s_idx) |
5002 | goto cont; | |
5003 | idev = __in6_dev_get(dev); | |
5004 | if (!idev) | |
5005 | goto cont; | |
5006 | if (inet6_fill_ifinfo(skb, idev, | |
15e47304 | 5007 | NETLINK_CB(cb->skb).portid, |
84d2697d | 5008 | cb->nlh->nlmsg_seq, |
053c095a | 5009 | RTM_NEWLINK, NLM_F_MULTI) < 0) |
84d2697d | 5010 | goto out; |
7562f876 | 5011 | cont: |
84d2697d ED |
5012 | idx++; |
5013 | } | |
1da177e4 | 5014 | } |
84d2697d ED |
5015 | out: |
5016 | rcu_read_unlock(); | |
5017 | cb->args[1] = idx; | |
5018 | cb->args[0] = h; | |
1da177e4 LT |
5019 | |
5020 | return skb->len; | |
5021 | } | |
5022 | ||
5023 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
5024 | { | |
5025 | struct sk_buff *skb; | |
c346dca1 | 5026 | struct net *net = dev_net(idev->dev); |
8d7a76c9 | 5027 | int err = -ENOBUFS; |
1ab1457c | 5028 | |
339bf98f | 5029 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
63159f29 | 5030 | if (!skb) |
8d7a76c9 TG |
5031 | goto errout; |
5032 | ||
5033 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
5034 | if (err < 0) { |
5035 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
5036 | WARN_ON(err == -EMSGSIZE); | |
5037 | kfree_skb(skb); | |
5038 | goto errout; | |
5039 | } | |
5f75a104 | 5040 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC); |
1ce85fe4 | 5041 | return; |
8d7a76c9 TG |
5042 | errout: |
5043 | if (err < 0) | |
5f75a104 | 5044 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err); |
1da177e4 LT |
5045 | } |
5046 | ||
339bf98f TG |
5047 | static inline size_t inet6_prefix_nlmsg_size(void) |
5048 | { | |
5049 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
5050 | + nla_total_size(sizeof(struct in6_addr)) | |
5051 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
5052 | } | |
c5396a31 | 5053 | |
1da177e4 | 5054 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 5055 | struct prefix_info *pinfo, u32 portid, u32 seq, |
6051e2f4 | 5056 | int event, unsigned int flags) |
1da177e4 | 5057 | { |
6051e2f4 TG |
5058 | struct prefixmsg *pmsg; |
5059 | struct nlmsghdr *nlh; | |
1da177e4 LT |
5060 | struct prefix_cacheinfo ci; |
5061 | ||
15e47304 | 5062 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*pmsg), flags); |
63159f29 | 5063 | if (!nlh) |
26932566 | 5064 | return -EMSGSIZE; |
6051e2f4 TG |
5065 | |
5066 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 5067 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
5068 | pmsg->prefix_pad1 = 0; |
5069 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
5070 | pmsg->prefix_ifindex = idev->dev->ifindex; |
5071 | pmsg->prefix_len = pinfo->prefix_len; | |
5072 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 5073 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
5074 | pmsg->prefix_flags = 0; |
5075 | if (pinfo->onlink) | |
5076 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
5077 | if (pinfo->autoconf) | |
5078 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
5079 | ||
c78679e8 DM |
5080 | if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix)) |
5081 | goto nla_put_failure; | |
1da177e4 LT |
5082 | ci.preferred_time = ntohl(pinfo->prefered); |
5083 | ci.valid_time = ntohl(pinfo->valid); | |
c78679e8 DM |
5084 | if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci)) |
5085 | goto nla_put_failure; | |
053c095a JB |
5086 | nlmsg_end(skb, nlh); |
5087 | return 0; | |
1da177e4 | 5088 | |
6051e2f4 | 5089 | nla_put_failure: |
26932566 PM |
5090 | nlmsg_cancel(skb, nlh); |
5091 | return -EMSGSIZE; | |
1da177e4 LT |
5092 | } |
5093 | ||
1ab1457c | 5094 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
5095 | struct prefix_info *pinfo) |
5096 | { | |
5097 | struct sk_buff *skb; | |
c346dca1 | 5098 | struct net *net = dev_net(idev->dev); |
8c384bfa | 5099 | int err = -ENOBUFS; |
1da177e4 | 5100 | |
339bf98f | 5101 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
63159f29 | 5102 | if (!skb) |
8c384bfa TG |
5103 | goto errout; |
5104 | ||
5105 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
5106 | if (err < 0) { |
5107 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
5108 | WARN_ON(err == -EMSGSIZE); | |
5109 | kfree_skb(skb); | |
5110 | goto errout; | |
5111 | } | |
1ce85fe4 PNA |
5112 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
5113 | return; | |
8c384bfa TG |
5114 | errout: |
5115 | if (err < 0) | |
6fda7350 | 5116 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4 LT |
5117 | } |
5118 | ||
1da177e4 LT |
5119 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
5120 | { | |
63998ac2 ND |
5121 | struct net *net = dev_net(ifp->idev->dev); |
5122 | ||
c15b1cca HFS |
5123 | if (event) |
5124 | ASSERT_RTNL(); | |
5125 | ||
1da177e4 LT |
5126 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); |
5127 | ||
5128 | switch (event) { | |
5129 | case RTM_NEWADDR: | |
95c385b4 NH |
5130 | /* |
5131 | * If the address was optimistic | |
5132 | * we inserted the route at the start of | |
5133 | * our DAD process, so we don't need | |
5134 | * to do it again | |
5135 | */ | |
5136 | if (!(ifp->rt->rt6i_node)) | |
5137 | ip6_ins_rt(ifp->rt); | |
1da177e4 LT |
5138 | if (ifp->idev->cnf.forwarding) |
5139 | addrconf_join_anycast(ifp); | |
7996c799 | 5140 | if (!ipv6_addr_any(&ifp->peer_addr)) |
caeaba79 ND |
5141 | addrconf_prefix_route(&ifp->peer_addr, 128, |
5142 | ifp->idev->dev, 0, 0); | |
1da177e4 LT |
5143 | break; |
5144 | case RTM_DELADDR: | |
5145 | if (ifp->idev->cnf.forwarding) | |
5146 | addrconf_leave_anycast(ifp); | |
5147 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
7996c799 | 5148 | if (!ipv6_addr_any(&ifp->peer_addr)) { |
caeaba79 | 5149 | struct rt6_info *rt; |
caeaba79 | 5150 | |
e7478dfc ND |
5151 | rt = addrconf_get_prefix_route(&ifp->peer_addr, 128, |
5152 | ifp->idev->dev, 0, 0); | |
8e3d5be7 MKL |
5153 | if (rt) |
5154 | ip6_del_rt(rt); | |
caeaba79 | 5155 | } |
d8d1f30b | 5156 | dst_hold(&ifp->rt->dst); |
93fa159a | 5157 | |
8e3d5be7 | 5158 | ip6_del_rt(ifp->rt); |
705f1c86 HFS |
5159 | |
5160 | rt_genid_bump_ipv6(net); | |
1da177e4 LT |
5161 | break; |
5162 | } | |
63998ac2 | 5163 | atomic_inc(&net->ipv6.dev_addr_genid); |
1da177e4 LT |
5164 | } |
5165 | ||
5166 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
5167 | { | |
8814c4b5 | 5168 | rcu_read_lock_bh(); |
1da177e4 LT |
5169 | if (likely(ifp->idev->dead == 0)) |
5170 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 5171 | rcu_read_unlock_bh(); |
1da177e4 LT |
5172 | } |
5173 | ||
5174 | #ifdef CONFIG_SYSCTL | |
5175 | ||
5176 | static | |
fe2c6338 | 5177 | int addrconf_sysctl_forward(struct ctl_table *ctl, int write, |
1da177e4 LT |
5178 | void __user *buffer, size_t *lenp, loff_t *ppos) |
5179 | { | |
5180 | int *valp = ctl->data; | |
5181 | int val = *valp; | |
88af182e | 5182 | loff_t pos = *ppos; |
fe2c6338 | 5183 | struct ctl_table lctl; |
1da177e4 LT |
5184 | int ret; |
5185 | ||
013d97e9 FR |
5186 | /* |
5187 | * ctl->data points to idev->cnf.forwarding, we should | |
5188 | * not modify it until we get the rtnl lock. | |
5189 | */ | |
5190 | lctl = *ctl; | |
5191 | lctl.data = &val; | |
5192 | ||
5193 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
1da177e4 | 5194 | |
c8fecf22 | 5195 | if (write) |
b325fddb | 5196 | ret = addrconf_fixup_forwarding(ctl, valp, val); |
88af182e EB |
5197 | if (ret) |
5198 | *ppos = pos; | |
1ab1457c | 5199 | return ret; |
1da177e4 LT |
5200 | } |
5201 | ||
77751427 ML |
5202 | static |
5203 | int addrconf_sysctl_mtu(struct ctl_table *ctl, int write, | |
5204 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
5205 | { | |
5206 | struct inet6_dev *idev = ctl->extra1; | |
5207 | int min_mtu = IPV6_MIN_MTU; | |
5208 | struct ctl_table lctl; | |
5209 | ||
5210 | lctl = *ctl; | |
5211 | lctl.extra1 = &min_mtu; | |
5212 | lctl.extra2 = idev ? &idev->dev->mtu : NULL; | |
5213 | ||
5214 | return proc_dointvec_minmax(&lctl, write, buffer, lenp, ppos); | |
5215 | } | |
5216 | ||
56d417b1 BH |
5217 | static void dev_disable_change(struct inet6_dev *idev) |
5218 | { | |
75538c2b CW |
5219 | struct netdev_notifier_info info; |
5220 | ||
56d417b1 BH |
5221 | if (!idev || !idev->dev) |
5222 | return; | |
5223 | ||
75538c2b | 5224 | netdev_notifier_info_init(&info, idev->dev); |
56d417b1 | 5225 | if (idev->cnf.disable_ipv6) |
75538c2b | 5226 | addrconf_notify(NULL, NETDEV_DOWN, &info); |
56d417b1 | 5227 | else |
75538c2b | 5228 | addrconf_notify(NULL, NETDEV_UP, &info); |
56d417b1 BH |
5229 | } |
5230 | ||
5231 | static void addrconf_disable_change(struct net *net, __s32 newf) | |
5232 | { | |
5233 | struct net_device *dev; | |
5234 | struct inet6_dev *idev; | |
5235 | ||
c6d14c84 ED |
5236 | rcu_read_lock(); |
5237 | for_each_netdev_rcu(net, dev) { | |
56d417b1 BH |
5238 | idev = __in6_dev_get(dev); |
5239 | if (idev) { | |
5240 | int changed = (!idev->cnf.disable_ipv6) ^ (!newf); | |
5241 | idev->cnf.disable_ipv6 = newf; | |
5242 | if (changed) | |
5243 | dev_disable_change(idev); | |
5244 | } | |
56d417b1 | 5245 | } |
c6d14c84 | 5246 | rcu_read_unlock(); |
56d417b1 BH |
5247 | } |
5248 | ||
013d97e9 | 5249 | static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf) |
56d417b1 BH |
5250 | { |
5251 | struct net *net; | |
013d97e9 FR |
5252 | int old; |
5253 | ||
5254 | if (!rtnl_trylock()) | |
5255 | return restart_syscall(); | |
56d417b1 BH |
5256 | |
5257 | net = (struct net *)table->extra2; | |
013d97e9 FR |
5258 | old = *p; |
5259 | *p = newf; | |
56d417b1 | 5260 | |
013d97e9 FR |
5261 | if (p == &net->ipv6.devconf_dflt->disable_ipv6) { |
5262 | rtnl_unlock(); | |
56d417b1 | 5263 | return 0; |
88af182e | 5264 | } |
56d417b1 BH |
5265 | |
5266 | if (p == &net->ipv6.devconf_all->disable_ipv6) { | |
56d417b1 BH |
5267 | net->ipv6.devconf_dflt->disable_ipv6 = newf; |
5268 | addrconf_disable_change(net, newf); | |
013d97e9 | 5269 | } else if ((!newf) ^ (!old)) |
56d417b1 BH |
5270 | dev_disable_change((struct inet6_dev *)table->extra1); |
5271 | ||
5272 | rtnl_unlock(); | |
5273 | return 0; | |
5274 | } | |
5275 | ||
5276 | static | |
fe2c6338 | 5277 | int addrconf_sysctl_disable(struct ctl_table *ctl, int write, |
56d417b1 BH |
5278 | void __user *buffer, size_t *lenp, loff_t *ppos) |
5279 | { | |
5280 | int *valp = ctl->data; | |
5281 | int val = *valp; | |
88af182e | 5282 | loff_t pos = *ppos; |
fe2c6338 | 5283 | struct ctl_table lctl; |
56d417b1 BH |
5284 | int ret; |
5285 | ||
013d97e9 FR |
5286 | /* |
5287 | * ctl->data points to idev->cnf.disable_ipv6, we should | |
5288 | * not modify it until we get the rtnl lock. | |
5289 | */ | |
5290 | lctl = *ctl; | |
5291 | lctl.data = &val; | |
5292 | ||
5293 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
56d417b1 BH |
5294 | |
5295 | if (write) | |
5296 | ret = addrconf_disable_ipv6(ctl, valp, val); | |
88af182e EB |
5297 | if (ret) |
5298 | *ppos = pos; | |
56d417b1 BH |
5299 | return ret; |
5300 | } | |
5301 | ||
c92d5491 | 5302 | static |
5303 | int addrconf_sysctl_proxy_ndp(struct ctl_table *ctl, int write, | |
5304 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
5305 | { | |
5306 | int *valp = ctl->data; | |
5307 | int ret; | |
5308 | int old, new; | |
5309 | ||
5310 | old = *valp; | |
5311 | ret = proc_dointvec(ctl, write, buffer, lenp, ppos); | |
5312 | new = *valp; | |
5313 | ||
5314 | if (write && old != new) { | |
5315 | struct net *net = ctl->extra2; | |
5316 | ||
5317 | if (!rtnl_trylock()) | |
5318 | return restart_syscall(); | |
5319 | ||
5320 | if (valp == &net->ipv6.devconf_dflt->proxy_ndp) | |
5321 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, | |
5322 | NETCONFA_IFINDEX_DEFAULT, | |
5323 | net->ipv6.devconf_dflt); | |
5324 | else if (valp == &net->ipv6.devconf_all->proxy_ndp) | |
5325 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, | |
5326 | NETCONFA_IFINDEX_ALL, | |
5327 | net->ipv6.devconf_all); | |
5328 | else { | |
5329 | struct inet6_dev *idev = ctl->extra1; | |
5330 | ||
5331 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, | |
5332 | idev->dev->ifindex, | |
5333 | &idev->cnf); | |
5334 | } | |
5335 | rtnl_unlock(); | |
5336 | } | |
5337 | ||
5338 | return ret; | |
5339 | } | |
5340 | ||
3d1bec99 HFS |
5341 | static int addrconf_sysctl_stable_secret(struct ctl_table *ctl, int write, |
5342 | void __user *buffer, size_t *lenp, | |
5343 | loff_t *ppos) | |
5344 | { | |
5345 | int err; | |
5346 | struct in6_addr addr; | |
5347 | char str[IPV6_MAX_STRLEN]; | |
5348 | struct ctl_table lctl = *ctl; | |
622c81d5 | 5349 | struct net *net = ctl->extra2; |
3d1bec99 HFS |
5350 | struct ipv6_stable_secret *secret = ctl->data; |
5351 | ||
622c81d5 HFS |
5352 | if (&net->ipv6.devconf_all->stable_secret == ctl->data) |
5353 | return -EIO; | |
5354 | ||
3d1bec99 HFS |
5355 | lctl.maxlen = IPV6_MAX_STRLEN; |
5356 | lctl.data = str; | |
5357 | ||
5358 | if (!rtnl_trylock()) | |
5359 | return restart_syscall(); | |
5360 | ||
5361 | if (!write && !secret->initialized) { | |
5362 | err = -EIO; | |
5363 | goto out; | |
5364 | } | |
5365 | ||
5366 | if (!write) { | |
5367 | err = snprintf(str, sizeof(str), "%pI6", | |
5368 | &secret->secret); | |
5369 | if (err >= sizeof(str)) { | |
5370 | err = -EIO; | |
5371 | goto out; | |
5372 | } | |
5373 | } | |
5374 | ||
5375 | err = proc_dostring(&lctl, write, buffer, lenp, ppos); | |
5376 | if (err || !write) | |
5377 | goto out; | |
5378 | ||
5379 | if (in6_pton(str, -1, addr.in6_u.u6_addr8, -1, NULL) != 1) { | |
5380 | err = -EIO; | |
5381 | goto out; | |
5382 | } | |
5383 | ||
5384 | secret->initialized = true; | |
5385 | secret->secret = addr; | |
5386 | ||
622c81d5 HFS |
5387 | if (&net->ipv6.devconf_dflt->stable_secret == ctl->data) { |
5388 | struct net_device *dev; | |
5389 | ||
5390 | for_each_netdev(net, dev) { | |
5391 | struct inet6_dev *idev = __in6_dev_get(dev); | |
5392 | ||
5393 | if (idev) { | |
5394 | idev->addr_gen_mode = | |
5395 | IN6_ADDR_GEN_MODE_STABLE_PRIVACY; | |
5396 | } | |
5397 | } | |
5398 | } else { | |
5399 | struct inet6_dev *idev = ctl->extra1; | |
5400 | ||
5401 | idev->addr_gen_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY; | |
5402 | } | |
5403 | ||
3d1bec99 HFS |
5404 | out: |
5405 | rtnl_unlock(); | |
5406 | ||
5407 | return err; | |
5408 | } | |
c92d5491 | 5409 | |
35103d11 AG |
5410 | static |
5411 | int addrconf_sysctl_ignore_routes_with_linkdown(struct ctl_table *ctl, | |
5412 | int write, | |
5413 | void __user *buffer, | |
5414 | size_t *lenp, | |
5415 | loff_t *ppos) | |
5416 | { | |
5417 | int *valp = ctl->data; | |
5418 | int val = *valp; | |
5419 | loff_t pos = *ppos; | |
5420 | struct ctl_table lctl; | |
5421 | int ret; | |
5422 | ||
5423 | /* ctl->data points to idev->cnf.ignore_routes_when_linkdown | |
5424 | * we should not modify it until we get the rtnl lock. | |
5425 | */ | |
5426 | lctl = *ctl; | |
5427 | lctl.data = &val; | |
5428 | ||
5429 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
5430 | ||
5431 | if (write) | |
5432 | ret = addrconf_fixup_linkdown(ctl, valp, val); | |
5433 | if (ret) | |
5434 | *ppos = pos; | |
5435 | return ret; | |
5436 | } | |
5437 | ||
1da177e4 LT |
5438 | static struct addrconf_sysctl_table |
5439 | { | |
5440 | struct ctl_table_header *sysctl_header; | |
fe2c6338 | 5441 | struct ctl_table addrconf_vars[DEVCONF_MAX+1]; |
ab32ea5d | 5442 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
5443 | .sysctl_header = NULL, |
5444 | .addrconf_vars = { | |
1ab1457c | 5445 | { |
e21e8467 SH |
5446 | .procname = "forwarding", |
5447 | .data = &ipv6_devconf.forwarding, | |
5448 | .maxlen = sizeof(int), | |
5449 | .mode = 0644, | |
5450 | .proc_handler = addrconf_sysctl_forward, | |
1da177e4 LT |
5451 | }, |
5452 | { | |
e21e8467 SH |
5453 | .procname = "hop_limit", |
5454 | .data = &ipv6_devconf.hop_limit, | |
5455 | .maxlen = sizeof(int), | |
5456 | .mode = 0644, | |
5457 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5458 | }, |
5459 | { | |
e21e8467 SH |
5460 | .procname = "mtu", |
5461 | .data = &ipv6_devconf.mtu6, | |
5462 | .maxlen = sizeof(int), | |
5463 | .mode = 0644, | |
77751427 | 5464 | .proc_handler = addrconf_sysctl_mtu, |
1da177e4 LT |
5465 | }, |
5466 | { | |
e21e8467 SH |
5467 | .procname = "accept_ra", |
5468 | .data = &ipv6_devconf.accept_ra, | |
5469 | .maxlen = sizeof(int), | |
5470 | .mode = 0644, | |
5471 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5472 | }, |
5473 | { | |
e21e8467 SH |
5474 | .procname = "accept_redirects", |
5475 | .data = &ipv6_devconf.accept_redirects, | |
5476 | .maxlen = sizeof(int), | |
5477 | .mode = 0644, | |
5478 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5479 | }, |
5480 | { | |
e21e8467 SH |
5481 | .procname = "autoconf", |
5482 | .data = &ipv6_devconf.autoconf, | |
5483 | .maxlen = sizeof(int), | |
5484 | .mode = 0644, | |
5485 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5486 | }, |
5487 | { | |
e21e8467 SH |
5488 | .procname = "dad_transmits", |
5489 | .data = &ipv6_devconf.dad_transmits, | |
5490 | .maxlen = sizeof(int), | |
5491 | .mode = 0644, | |
5492 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5493 | }, |
5494 | { | |
e21e8467 SH |
5495 | .procname = "router_solicitations", |
5496 | .data = &ipv6_devconf.rtr_solicits, | |
5497 | .maxlen = sizeof(int), | |
5498 | .mode = 0644, | |
5499 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5500 | }, |
5501 | { | |
e21e8467 SH |
5502 | .procname = "router_solicitation_interval", |
5503 | .data = &ipv6_devconf.rtr_solicit_interval, | |
5504 | .maxlen = sizeof(int), | |
5505 | .mode = 0644, | |
5506 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
5507 | }, |
5508 | { | |
e21e8467 SH |
5509 | .procname = "router_solicitation_delay", |
5510 | .data = &ipv6_devconf.rtr_solicit_delay, | |
5511 | .maxlen = sizeof(int), | |
5512 | .mode = 0644, | |
5513 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
5514 | }, |
5515 | { | |
e21e8467 SH |
5516 | .procname = "force_mld_version", |
5517 | .data = &ipv6_devconf.force_mld_version, | |
5518 | .maxlen = sizeof(int), | |
5519 | .mode = 0644, | |
5520 | .proc_handler = proc_dointvec, | |
1da177e4 | 5521 | }, |
fc4eba58 HFS |
5522 | { |
5523 | .procname = "mldv1_unsolicited_report_interval", | |
5524 | .data = | |
5525 | &ipv6_devconf.mldv1_unsolicited_report_interval, | |
5526 | .maxlen = sizeof(int), | |
5527 | .mode = 0644, | |
5528 | .proc_handler = proc_dointvec_ms_jiffies, | |
5529 | }, | |
5530 | { | |
5531 | .procname = "mldv2_unsolicited_report_interval", | |
5532 | .data = | |
5533 | &ipv6_devconf.mldv2_unsolicited_report_interval, | |
5534 | .maxlen = sizeof(int), | |
5535 | .mode = 0644, | |
5536 | .proc_handler = proc_dointvec_ms_jiffies, | |
5537 | }, | |
1da177e4 | 5538 | { |
e21e8467 SH |
5539 | .procname = "use_tempaddr", |
5540 | .data = &ipv6_devconf.use_tempaddr, | |
5541 | .maxlen = sizeof(int), | |
5542 | .mode = 0644, | |
5543 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5544 | }, |
5545 | { | |
e21e8467 SH |
5546 | .procname = "temp_valid_lft", |
5547 | .data = &ipv6_devconf.temp_valid_lft, | |
5548 | .maxlen = sizeof(int), | |
5549 | .mode = 0644, | |
5550 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5551 | }, |
5552 | { | |
e21e8467 SH |
5553 | .procname = "temp_prefered_lft", |
5554 | .data = &ipv6_devconf.temp_prefered_lft, | |
5555 | .maxlen = sizeof(int), | |
5556 | .mode = 0644, | |
5557 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5558 | }, |
5559 | { | |
e21e8467 SH |
5560 | .procname = "regen_max_retry", |
5561 | .data = &ipv6_devconf.regen_max_retry, | |
5562 | .maxlen = sizeof(int), | |
5563 | .mode = 0644, | |
5564 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5565 | }, |
5566 | { | |
e21e8467 SH |
5567 | .procname = "max_desync_factor", |
5568 | .data = &ipv6_devconf.max_desync_factor, | |
5569 | .maxlen = sizeof(int), | |
5570 | .mode = 0644, | |
5571 | .proc_handler = proc_dointvec, | |
1da177e4 | 5572 | }, |
1da177e4 | 5573 | { |
e21e8467 SH |
5574 | .procname = "max_addresses", |
5575 | .data = &ipv6_devconf.max_addresses, | |
5576 | .maxlen = sizeof(int), | |
5577 | .mode = 0644, | |
5578 | .proc_handler = proc_dointvec, | |
1da177e4 | 5579 | }, |
65f5c7c1 | 5580 | { |
e21e8467 SH |
5581 | .procname = "accept_ra_defrtr", |
5582 | .data = &ipv6_devconf.accept_ra_defrtr, | |
5583 | .maxlen = sizeof(int), | |
5584 | .mode = 0644, | |
5585 | .proc_handler = proc_dointvec, | |
65f5c7c1 | 5586 | }, |
8013d1d7 HL |
5587 | { |
5588 | .procname = "accept_ra_min_hop_limit", | |
5589 | .data = &ipv6_devconf.accept_ra_min_hop_limit, | |
5590 | .maxlen = sizeof(int), | |
5591 | .mode = 0644, | |
5592 | .proc_handler = proc_dointvec, | |
5593 | }, | |
c4fd30eb | 5594 | { |
e21e8467 SH |
5595 | .procname = "accept_ra_pinfo", |
5596 | .data = &ipv6_devconf.accept_ra_pinfo, | |
5597 | .maxlen = sizeof(int), | |
5598 | .mode = 0644, | |
5599 | .proc_handler = proc_dointvec, | |
c4fd30eb | 5600 | }, |
930d6ff2 YH |
5601 | #ifdef CONFIG_IPV6_ROUTER_PREF |
5602 | { | |
e21e8467 SH |
5603 | .procname = "accept_ra_rtr_pref", |
5604 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
5605 | .maxlen = sizeof(int), | |
5606 | .mode = 0644, | |
5607 | .proc_handler = proc_dointvec, | |
930d6ff2 | 5608 | }, |
52e16356 | 5609 | { |
e21e8467 SH |
5610 | .procname = "router_probe_interval", |
5611 | .data = &ipv6_devconf.rtr_probe_interval, | |
5612 | .maxlen = sizeof(int), | |
5613 | .mode = 0644, | |
5614 | .proc_handler = proc_dointvec_jiffies, | |
52e16356 | 5615 | }, |
fa03ef38 | 5616 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 | 5617 | { |
e21e8467 SH |
5618 | .procname = "accept_ra_rt_info_max_plen", |
5619 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
5620 | .maxlen = sizeof(int), | |
5621 | .mode = 0644, | |
5622 | .proc_handler = proc_dointvec, | |
09c884d4 YH |
5623 | }, |
5624 | #endif | |
930d6ff2 | 5625 | #endif |
fbea49e1 | 5626 | { |
e21e8467 SH |
5627 | .procname = "proxy_ndp", |
5628 | .data = &ipv6_devconf.proxy_ndp, | |
5629 | .maxlen = sizeof(int), | |
5630 | .mode = 0644, | |
c92d5491 | 5631 | .proc_handler = addrconf_sysctl_proxy_ndp, |
fbea49e1 | 5632 | }, |
0bcbc926 | 5633 | { |
e21e8467 SH |
5634 | .procname = "accept_source_route", |
5635 | .data = &ipv6_devconf.accept_source_route, | |
5636 | .maxlen = sizeof(int), | |
5637 | .mode = 0644, | |
5638 | .proc_handler = proc_dointvec, | |
0bcbc926 | 5639 | }, |
95c385b4 NH |
5640 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
5641 | { | |
e21e8467 SH |
5642 | .procname = "optimistic_dad", |
5643 | .data = &ipv6_devconf.optimistic_dad, | |
5644 | .maxlen = sizeof(int), | |
5645 | .mode = 0644, | |
5646 | .proc_handler = proc_dointvec, | |
95c385b4 NH |
5647 | |
5648 | }, | |
7fd2561e EK |
5649 | { |
5650 | .procname = "use_optimistic", | |
5651 | .data = &ipv6_devconf.use_optimistic, | |
5652 | .maxlen = sizeof(int), | |
5653 | .mode = 0644, | |
5654 | .proc_handler = proc_dointvec, | |
5655 | ||
5656 | }, | |
7bc570c8 YH |
5657 | #endif |
5658 | #ifdef CONFIG_IPV6_MROUTE | |
5659 | { | |
e21e8467 SH |
5660 | .procname = "mc_forwarding", |
5661 | .data = &ipv6_devconf.mc_forwarding, | |
5662 | .maxlen = sizeof(int), | |
5663 | .mode = 0444, | |
5664 | .proc_handler = proc_dointvec, | |
7bc570c8 | 5665 | }, |
95c385b4 | 5666 | #endif |
778d80be | 5667 | { |
e21e8467 SH |
5668 | .procname = "disable_ipv6", |
5669 | .data = &ipv6_devconf.disable_ipv6, | |
5670 | .maxlen = sizeof(int), | |
5671 | .mode = 0644, | |
5672 | .proc_handler = addrconf_sysctl_disable, | |
778d80be | 5673 | }, |
1b34be74 | 5674 | { |
e21e8467 SH |
5675 | .procname = "accept_dad", |
5676 | .data = &ipv6_devconf.accept_dad, | |
5677 | .maxlen = sizeof(int), | |
5678 | .mode = 0644, | |
5679 | .proc_handler = proc_dointvec, | |
1b34be74 | 5680 | }, |
f7734fdf | 5681 | { |
f7734fdf OP |
5682 | .procname = "force_tllao", |
5683 | .data = &ipv6_devconf.force_tllao, | |
5684 | .maxlen = sizeof(int), | |
5685 | .mode = 0644, | |
5686 | .proc_handler = proc_dointvec | |
5687 | }, | |
5cb04436 HFS |
5688 | { |
5689 | .procname = "ndisc_notify", | |
5690 | .data = &ipv6_devconf.ndisc_notify, | |
5691 | .maxlen = sizeof(int), | |
5692 | .mode = 0644, | |
5693 | .proc_handler = proc_dointvec | |
5694 | }, | |
b800c3b9 HFS |
5695 | { |
5696 | .procname = "suppress_frag_ndisc", | |
5697 | .data = &ipv6_devconf.suppress_frag_ndisc, | |
5698 | .maxlen = sizeof(int), | |
5699 | .mode = 0644, | |
5700 | .proc_handler = proc_dointvec | |
5701 | }, | |
d9333196 BG |
5702 | { |
5703 | .procname = "accept_ra_from_local", | |
5704 | .data = &ipv6_devconf.accept_ra_from_local, | |
5705 | .maxlen = sizeof(int), | |
5706 | .mode = 0644, | |
5707 | .proc_handler = proc_dointvec, | |
5708 | }, | |
c2943f14 HH |
5709 | { |
5710 | .procname = "accept_ra_mtu", | |
5711 | .data = &ipv6_devconf.accept_ra_mtu, | |
5712 | .maxlen = sizeof(int), | |
5713 | .mode = 0644, | |
5714 | .proc_handler = proc_dointvec, | |
5715 | }, | |
3d1bec99 HFS |
5716 | { |
5717 | .procname = "stable_secret", | |
5718 | .data = &ipv6_devconf.stable_secret, | |
5719 | .maxlen = IPV6_MAX_STRLEN, | |
5720 | .mode = 0600, | |
5721 | .proc_handler = addrconf_sysctl_stable_secret, | |
5722 | }, | |
3985e8a3 EK |
5723 | { |
5724 | .procname = "use_oif_addrs_only", | |
5725 | .data = &ipv6_devconf.use_oif_addrs_only, | |
5726 | .maxlen = sizeof(int), | |
5727 | .mode = 0644, | |
5728 | .proc_handler = proc_dointvec, | |
35103d11 AG |
5729 | }, |
5730 | { | |
5731 | .procname = "ignore_routes_with_linkdown", | |
5732 | .data = &ipv6_devconf.ignore_routes_with_linkdown, | |
5733 | .maxlen = sizeof(int), | |
5734 | .mode = 0644, | |
5735 | .proc_handler = addrconf_sysctl_ignore_routes_with_linkdown, | |
3985e8a3 | 5736 | }, |
1da177e4 | 5737 | { |
f8572d8f | 5738 | /* sentinel */ |
1da177e4 LT |
5739 | } |
5740 | }, | |
1da177e4 LT |
5741 | }; |
5742 | ||
bff16c2f | 5743 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
f8572d8f | 5744 | struct inet6_dev *idev, struct ipv6_devconf *p) |
1da177e4 LT |
5745 | { |
5746 | int i; | |
1da177e4 | 5747 | struct addrconf_sysctl_table *t; |
6105e293 | 5748 | char path[sizeof("net/ipv6/conf/") + IFNAMSIZ]; |
1dab6222 | 5749 | |
af879cc7 | 5750 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
63159f29 | 5751 | if (!t) |
f68635e6 PE |
5752 | goto out; |
5753 | ||
bcdd553f | 5754 | for (i = 0; t->addrconf_vars[i].data; i++) { |
e21e8467 | 5755 | t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf; |
1da177e4 | 5756 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
bff16c2f | 5757 | t->addrconf_vars[i].extra2 = net; |
1da177e4 | 5758 | } |
1da177e4 | 5759 | |
6105e293 | 5760 | snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name); |
1da177e4 | 5761 | |
6105e293 | 5762 | t->sysctl_header = register_net_sysctl(net, path, t->addrconf_vars); |
63159f29 | 5763 | if (!t->sysctl_header) |
6105e293 | 5764 | goto free; |
f68635e6 PE |
5765 | |
5766 | p->sysctl = t; | |
95897312 | 5767 | return 0; |
1da177e4 | 5768 | |
f68635e6 | 5769 | free: |
1da177e4 | 5770 | kfree(t); |
f68635e6 | 5771 | out: |
95897312 | 5772 | return -ENOBUFS; |
1da177e4 LT |
5773 | } |
5774 | ||
408c4768 PE |
5775 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
5776 | { | |
5777 | struct addrconf_sysctl_table *t; | |
5778 | ||
63159f29 | 5779 | if (!p->sysctl) |
408c4768 PE |
5780 | return; |
5781 | ||
5782 | t = p->sysctl; | |
5783 | p->sysctl = NULL; | |
ff538818 | 5784 | unregister_net_sysctl_table(t->sysctl_header); |
408c4768 PE |
5785 | kfree(t); |
5786 | } | |
5787 | ||
a317a2f1 | 5788 | static int addrconf_sysctl_register(struct inet6_dev *idev) |
f52295a9 | 5789 | { |
a317a2f1 WC |
5790 | int err; |
5791 | ||
5792 | if (!sysctl_dev_name_is_allowed(idev->dev->name)) | |
5793 | return -EINVAL; | |
5794 | ||
5795 | err = neigh_sysctl_register(idev->dev, idev->nd_parms, | |
5796 | &ndisc_ifinfo_sysctl_change); | |
5797 | if (err) | |
5798 | return err; | |
5799 | err = __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, | |
5800 | idev, &idev->cnf); | |
5801 | if (err) | |
5802 | neigh_sysctl_unregister(idev->nd_parms); | |
5803 | ||
5804 | return err; | |
f52295a9 PE |
5805 | } |
5806 | ||
408c4768 | 5807 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4 | 5808 | { |
408c4768 PE |
5809 | __addrconf_sysctl_unregister(&idev->cnf); |
5810 | neigh_sysctl_unregister(idev->nd_parms); | |
1da177e4 LT |
5811 | } |
5812 | ||
5813 | ||
5814 | #endif | |
5815 | ||
2c8c1e72 | 5816 | static int __net_init addrconf_init_net(struct net *net) |
e0da5a48 | 5817 | { |
a79ca223 | 5818 | int err = -ENOMEM; |
e0da5a48 PE |
5819 | struct ipv6_devconf *all, *dflt; |
5820 | ||
a79ca223 | 5821 | all = kmemdup(&ipv6_devconf, sizeof(ipv6_devconf), GFP_KERNEL); |
63159f29 | 5822 | if (!all) |
a79ca223 | 5823 | goto err_alloc_all; |
e0da5a48 | 5824 | |
a79ca223 | 5825 | dflt = kmemdup(&ipv6_devconf_dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); |
63159f29 | 5826 | if (!dflt) |
a79ca223 | 5827 | goto err_alloc_dflt; |
e0da5a48 | 5828 | |
a79ca223 HZ |
5829 | /* these will be inherited by all namespaces */ |
5830 | dflt->autoconf = ipv6_defaults.autoconf; | |
5831 | dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; | |
e0da5a48 | 5832 | |
3d1bec99 HFS |
5833 | dflt->stable_secret.initialized = false; |
5834 | all->stable_secret.initialized = false; | |
5835 | ||
e0da5a48 PE |
5836 | net->ipv6.devconf_all = all; |
5837 | net->ipv6.devconf_dflt = dflt; | |
5838 | ||
5839 | #ifdef CONFIG_SYSCTL | |
f8572d8f | 5840 | err = __addrconf_sysctl_register(net, "all", NULL, all); |
e0da5a48 PE |
5841 | if (err < 0) |
5842 | goto err_reg_all; | |
5843 | ||
f8572d8f | 5844 | err = __addrconf_sysctl_register(net, "default", NULL, dflt); |
e0da5a48 PE |
5845 | if (err < 0) |
5846 | goto err_reg_dflt; | |
5847 | #endif | |
5848 | return 0; | |
5849 | ||
5850 | #ifdef CONFIG_SYSCTL | |
5851 | err_reg_dflt: | |
5852 | __addrconf_sysctl_unregister(all); | |
5853 | err_reg_all: | |
5854 | kfree(dflt); | |
5855 | #endif | |
5856 | err_alloc_dflt: | |
5857 | kfree(all); | |
5858 | err_alloc_all: | |
5859 | return err; | |
5860 | } | |
5861 | ||
2c8c1e72 | 5862 | static void __net_exit addrconf_exit_net(struct net *net) |
e0da5a48 PE |
5863 | { |
5864 | #ifdef CONFIG_SYSCTL | |
5865 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); | |
5866 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); | |
5867 | #endif | |
73cf0e92 | 5868 | kfree(net->ipv6.devconf_dflt); |
5869 | kfree(net->ipv6.devconf_all); | |
e0da5a48 PE |
5870 | } |
5871 | ||
5872 | static struct pernet_operations addrconf_ops = { | |
5873 | .init = addrconf_init_net, | |
5874 | .exit = addrconf_exit_net, | |
5875 | }; | |
5876 | ||
207895fd | 5877 | static struct rtnl_af_ops inet6_ops __read_mostly = { |
b382b191 TG |
5878 | .family = AF_INET6, |
5879 | .fill_link_af = inet6_fill_link_af, | |
5880 | .get_link_af_size = inet6_get_link_af_size, | |
11b1f828 | 5881 | .validate_link_af = inet6_validate_link_af, |
f53adae4 | 5882 | .set_link_af = inet6_set_link_af, |
b382b191 TG |
5883 | }; |
5884 | ||
1da177e4 LT |
5885 | /* |
5886 | * Init / cleanup code | |
5887 | */ | |
5888 | ||
5889 | int __init addrconf_init(void) | |
5890 | { | |
a317a2f1 | 5891 | struct inet6_dev *idev; |
c2e21293 | 5892 | int i, err; |
2a8cc6c8 | 5893 | |
e21e8467 SH |
5894 | err = ipv6_addr_label_init(); |
5895 | if (err < 0) { | |
f3213831 JP |
5896 | pr_crit("%s: cannot initialize default policy table: %d\n", |
5897 | __func__, err); | |
2cc6d2bf | 5898 | goto out; |
2a8cc6c8 | 5899 | } |
1da177e4 | 5900 | |
2cc6d2bf NH |
5901 | err = register_pernet_subsys(&addrconf_ops); |
5902 | if (err < 0) | |
5903 | goto out_addrlabel; | |
e0da5a48 | 5904 | |
c15b1cca HFS |
5905 | addrconf_wq = create_workqueue("ipv6_addrconf"); |
5906 | if (!addrconf_wq) { | |
5907 | err = -ENOMEM; | |
5908 | goto out_nowq; | |
5909 | } | |
5910 | ||
1da177e4 LT |
5911 | /* The addrconf netdev notifier requires that loopback_dev |
5912 | * has it's ipv6 private information allocated and setup | |
5913 | * before it can bring up and give link-local addresses | |
5914 | * to other devices which are up. | |
5915 | * | |
5916 | * Unfortunately, loopback_dev is not necessarily the first | |
5917 | * entry in the global dev_base list of net devices. In fact, | |
5918 | * it is likely to be the very last entry on that list. | |
5919 | * So this causes the notifier registry below to try and | |
5920 | * give link-local addresses to all devices besides loopback_dev | |
5921 | * first, then loopback_dev, which cases all the non-loopback_dev | |
5922 | * devices to fail to get a link-local address. | |
5923 | * | |
5924 | * So, as a temporary fix, allocate the ipv6 structure for | |
5925 | * loopback_dev first by hand. | |
5926 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
5927 | * device and it being up should be removed. | |
5928 | */ | |
5929 | rtnl_lock(); | |
a317a2f1 | 5930 | idev = ipv6_add_dev(init_net.loopback_dev); |
1da177e4 | 5931 | rtnl_unlock(); |
a317a2f1 WC |
5932 | if (IS_ERR(idev)) { |
5933 | err = PTR_ERR(idev); | |
e0da5a48 | 5934 | goto errlo; |
a317a2f1 | 5935 | } |
1da177e4 | 5936 | |
c2e21293 | 5937 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
5938 | INIT_HLIST_HEAD(&inet6_addr_lst[i]); | |
5939 | ||
1da177e4 LT |
5940 | register_netdevice_notifier(&ipv6_dev_notf); |
5941 | ||
c15b1cca | 5942 | addrconf_verify(); |
c127ea2c | 5943 | |
3678a9d8 | 5944 | rtnl_af_register(&inet6_ops); |
b382b191 | 5945 | |
c7ac8679 GR |
5946 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo, |
5947 | NULL); | |
c127ea2c TG |
5948 | if (err < 0) |
5949 | goto errout; | |
5950 | ||
5951 | /* Only the first call to __rtnl_register can fail */ | |
c7ac8679 GR |
5952 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL); |
5953 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL); | |
5954 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, | |
5955 | inet6_dump_ifaddr, NULL); | |
5956 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, | |
5957 | inet6_dump_ifmcaddr, NULL); | |
5958 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, | |
5959 | inet6_dump_ifacaddr, NULL); | |
76f8f6cb | 5960 | __rtnl_register(PF_INET6, RTM_GETNETCONF, inet6_netconf_get_devconf, |
7a674200 | 5961 | inet6_netconf_dump_devconf, NULL); |
c127ea2c | 5962 | |
2a8cc6c8 YH |
5963 | ipv6_addr_label_rtnl_register(); |
5964 | ||
1da177e4 | 5965 | return 0; |
c127ea2c | 5966 | errout: |
b382b191 | 5967 | rtnl_af_unregister(&inet6_ops); |
c127ea2c | 5968 | unregister_netdevice_notifier(&ipv6_dev_notf); |
e0da5a48 | 5969 | errlo: |
c15b1cca HFS |
5970 | destroy_workqueue(addrconf_wq); |
5971 | out_nowq: | |
e0da5a48 | 5972 | unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf NH |
5973 | out_addrlabel: |
5974 | ipv6_addr_label_cleanup(); | |
5975 | out: | |
c127ea2c | 5976 | return err; |
1da177e4 LT |
5977 | } |
5978 | ||
09f7709f | 5979 | void addrconf_cleanup(void) |
1da177e4 | 5980 | { |
176c39af | 5981 | struct net_device *dev; |
1da177e4 LT |
5982 | int i; |
5983 | ||
5984 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 | 5985 | unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf | 5986 | ipv6_addr_label_cleanup(); |
1da177e4 LT |
5987 | |
5988 | rtnl_lock(); | |
5989 | ||
b382b191 TG |
5990 | __rtnl_af_unregister(&inet6_ops); |
5991 | ||
176c39af DL |
5992 | /* clean dev list */ |
5993 | for_each_netdev(&init_net, dev) { | |
5994 | if (__in6_dev_get(dev) == NULL) | |
5995 | continue; | |
5996 | addrconf_ifdown(dev, 1); | |
5997 | } | |
5998 | addrconf_ifdown(init_net.loopback_dev, 2); | |
5999 | ||
1da177e4 LT |
6000 | /* |
6001 | * Check hash table. | |
6002 | */ | |
5c578aed | 6003 | spin_lock_bh(&addrconf_hash_lock); |
c2e21293 | 6004 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
6005 | WARN_ON(!hlist_empty(&inet6_addr_lst[i])); | |
5c578aed | 6006 | spin_unlock_bh(&addrconf_hash_lock); |
c15b1cca | 6007 | cancel_delayed_work(&addr_chk_work); |
1da177e4 | 6008 | rtnl_unlock(); |
c15b1cca HFS |
6009 | |
6010 | destroy_workqueue(addrconf_wq); | |
1da177e4 | 6011 | } |