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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 LT |
48 | #include <linux/net.h> |
49 | #include <linux/in6.h> | |
50 | #include <linux/netdevice.h> | |
1823730f | 51 | #include <linux/if_addr.h> |
1da177e4 LT |
52 | #include <linux/if_arp.h> |
53 | #include <linux/if_arcnet.h> | |
54 | #include <linux/if_infiniband.h> | |
55 | #include <linux/route.h> | |
56 | #include <linux/inetdevice.h> | |
57 | #include <linux/init.h> | |
5a0e3ad6 | 58 | #include <linux/slab.h> |
1da177e4 LT |
59 | #ifdef CONFIG_SYSCTL |
60 | #include <linux/sysctl.h> | |
61 | #endif | |
4fc268d2 | 62 | #include <linux/capability.h> |
1da177e4 LT |
63 | #include <linux/delay.h> |
64 | #include <linux/notifier.h> | |
543537bd | 65 | #include <linux/string.h> |
ddbe5032 | 66 | #include <linux/hash.h> |
1da177e4 | 67 | |
457c4cbc | 68 | #include <net/net_namespace.h> |
1da177e4 LT |
69 | #include <net/sock.h> |
70 | #include <net/snmp.h> | |
71 | ||
06a4c1c5 | 72 | #include <net/af_ieee802154.h> |
cb6bf355 | 73 | #include <net/firewire.h> |
1da177e4 LT |
74 | #include <net/ipv6.h> |
75 | #include <net/protocol.h> | |
76 | #include <net/ndisc.h> | |
77 | #include <net/ip6_route.h> | |
78 | #include <net/addrconf.h> | |
79 | #include <net/tcp.h> | |
80 | #include <net/ip.h> | |
5d620266 | 81 | #include <net/netlink.h> |
f24e3d65 | 82 | #include <net/pkt_sched.h> |
1da177e4 LT |
83 | #include <linux/if_tunnel.h> |
84 | #include <linux/rtnetlink.h> | |
f3a1bfb1 | 85 | #include <linux/netconf.h> |
1da177e4 | 86 | #include <linux/random.h> |
e21e8467 | 87 | #include <linux/uaccess.h> |
7f7d9a6b | 88 | #include <asm/unaligned.h> |
1da177e4 LT |
89 | |
90 | #include <linux/proc_fs.h> | |
91 | #include <linux/seq_file.h> | |
bc3b2d7f | 92 | #include <linux/export.h> |
1da177e4 LT |
93 | |
94 | /* Set to 3 to get tracing... */ | |
95 | #define ACONF_DEBUG 2 | |
96 | ||
97 | #if ACONF_DEBUG >= 3 | |
ba3542e1 | 98 | #define ADBG(fmt, ...) printk(fmt, ##__VA_ARGS__) |
1da177e4 | 99 | #else |
ba3542e1 | 100 | #define ADBG(fmt, ...) do { if (0) printk(fmt, ##__VA_ARGS__); } while (0) |
1da177e4 LT |
101 | #endif |
102 | ||
103 | #define INFINITY_LIFE_TIME 0xFFFFFFFF | |
18a31e1e TG |
104 | |
105 | static inline u32 cstamp_delta(unsigned long cstamp) | |
106 | { | |
107 | return (cstamp - INITIAL_JIFFIES) * 100UL / HZ; | |
108 | } | |
1da177e4 LT |
109 | |
110 | #ifdef CONFIG_SYSCTL | |
a317a2f1 | 111 | static int addrconf_sysctl_register(struct inet6_dev *idev); |
408c4768 PE |
112 | static void addrconf_sysctl_unregister(struct inet6_dev *idev); |
113 | #else | |
a317a2f1 | 114 | static inline int addrconf_sysctl_register(struct inet6_dev *idev) |
408c4768 | 115 | { |
a317a2f1 | 116 | return 0; |
408c4768 PE |
117 | } |
118 | ||
119 | static inline void addrconf_sysctl_unregister(struct inet6_dev *idev) | |
120 | { | |
121 | } | |
1da177e4 LT |
122 | #endif |
123 | ||
eb7e0575 SD |
124 | static void __ipv6_regen_rndid(struct inet6_dev *idev); |
125 | static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); | |
1da177e4 | 126 | static void ipv6_regen_rndid(unsigned long data); |
1da177e4 | 127 | |
1b34be74 | 128 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev); |
1da177e4 LT |
129 | static int ipv6_count_addresses(struct inet6_dev *idev); |
130 | ||
131 | /* | |
132 | * Configured unicast address hash table | |
133 | */ | |
c2e21293 | 134 | static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE]; |
5c578aed | 135 | static DEFINE_SPINLOCK(addrconf_hash_lock); |
1da177e4 | 136 | |
c15b1cca HFS |
137 | static void addrconf_verify(void); |
138 | static void addrconf_verify_rtnl(void); | |
139 | static void addrconf_verify_work(struct work_struct *); | |
1da177e4 | 140 | |
c15b1cca HFS |
141 | static struct workqueue_struct *addrconf_wq; |
142 | static DECLARE_DELAYED_WORK(addr_chk_work, addrconf_verify_work); | |
1da177e4 LT |
143 | |
144 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
145 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
146 | ||
93d9b7d7 JP |
147 | static void addrconf_type_change(struct net_device *dev, |
148 | unsigned long event); | |
1da177e4 LT |
149 | static int addrconf_ifdown(struct net_device *dev, int how); |
150 | ||
21caa662 RK |
151 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, |
152 | int plen, | |
153 | const struct net_device *dev, | |
154 | u32 flags, u32 noflags); | |
155 | ||
cf22f9a2 | 156 | static void addrconf_dad_start(struct inet6_ifaddr *ifp); |
c15b1cca | 157 | static void addrconf_dad_work(struct work_struct *w); |
1da177e4 | 158 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); |
c5e33bdd | 159 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
160 | static void addrconf_rs_timer(unsigned long data); |
161 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
162 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
163 | ||
1ab1457c | 164 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 | 165 | struct prefix_info *pinfo); |
3e81c6da DM |
166 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
167 | struct net_device *dev); | |
1da177e4 | 168 | |
888c848e | 169 | static struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
170 | .forwarding = 0, |
171 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
172 | .mtu6 = IPV6_MIN_MTU, | |
173 | .accept_ra = 1, | |
174 | .accept_redirects = 1, | |
175 | .autoconf = 1, | |
176 | .force_mld_version = 0, | |
fc4eba58 HFS |
177 | .mldv1_unsolicited_report_interval = 10 * HZ, |
178 | .mldv2_unsolicited_report_interval = HZ, | |
1da177e4 LT |
179 | .dad_transmits = 1, |
180 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
181 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
182 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
1da177e4 LT |
183 | .use_tempaddr = 0, |
184 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
185 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
186 | .regen_max_retry = REGEN_MAX_RETRY, | |
187 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
1da177e4 | 188 | .max_addresses = IPV6_MAX_ADDRESSES, |
65f5c7c1 | 189 | .accept_ra_defrtr = 1, |
d9333196 | 190 | .accept_ra_from_local = 0, |
c4fd30eb | 191 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
192 | #ifdef CONFIG_IPV6_ROUTER_PREF |
193 | .accept_ra_rtr_pref = 1, | |
52e16356 | 194 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
195 | #ifdef CONFIG_IPV6_ROUTE_INFO |
196 | .accept_ra_rt_info_max_plen = 0, | |
197 | #endif | |
930d6ff2 | 198 | #endif |
fbea49e1 | 199 | .proxy_ndp = 0, |
0bcbc926 | 200 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 201 | .disable_ipv6 = 0, |
1b34be74 | 202 | .accept_dad = 1, |
b800c3b9 | 203 | .suppress_frag_ndisc = 1, |
1da177e4 LT |
204 | }; |
205 | ||
ab32ea5d | 206 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
207 | .forwarding = 0, |
208 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
209 | .mtu6 = IPV6_MIN_MTU, | |
210 | .accept_ra = 1, | |
211 | .accept_redirects = 1, | |
212 | .autoconf = 1, | |
fc4eba58 HFS |
213 | .force_mld_version = 0, |
214 | .mldv1_unsolicited_report_interval = 10 * HZ, | |
215 | .mldv2_unsolicited_report_interval = HZ, | |
1da177e4 LT |
216 | .dad_transmits = 1, |
217 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
218 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
219 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
1da177e4 LT |
220 | .use_tempaddr = 0, |
221 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
222 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
223 | .regen_max_retry = REGEN_MAX_RETRY, | |
224 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
1da177e4 | 225 | .max_addresses = IPV6_MAX_ADDRESSES, |
65f5c7c1 | 226 | .accept_ra_defrtr = 1, |
d9333196 | 227 | .accept_ra_from_local = 0, |
c4fd30eb | 228 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
229 | #ifdef CONFIG_IPV6_ROUTER_PREF |
230 | .accept_ra_rtr_pref = 1, | |
52e16356 | 231 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
232 | #ifdef CONFIG_IPV6_ROUTE_INFO |
233 | .accept_ra_rt_info_max_plen = 0, | |
234 | #endif | |
930d6ff2 | 235 | #endif |
fbea49e1 | 236 | .proxy_ndp = 0, |
0bcbc926 | 237 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 238 | .disable_ipv6 = 0, |
1b34be74 | 239 | .accept_dad = 1, |
b800c3b9 | 240 | .suppress_frag_ndisc = 1, |
1da177e4 LT |
241 | }; |
242 | ||
f24e3d65 | 243 | /* Check if a valid qdisc is available */ |
05297949 | 244 | static inline bool addrconf_qdisc_ok(const struct net_device *dev) |
f24e3d65 | 245 | { |
05297949 | 246 | return !qdisc_tx_is_noop(dev); |
f24e3d65 MC |
247 | } |
248 | ||
b7b1bfce | 249 | static void addrconf_del_rs_timer(struct inet6_dev *idev) |
1da177e4 | 250 | { |
b7b1bfce HFS |
251 | if (del_timer(&idev->rs_timer)) |
252 | __in6_dev_put(idev); | |
253 | } | |
254 | ||
c15b1cca | 255 | static void addrconf_del_dad_work(struct inet6_ifaddr *ifp) |
b7b1bfce | 256 | { |
c15b1cca | 257 | if (cancel_delayed_work(&ifp->dad_work)) |
1da177e4 LT |
258 | __in6_ifa_put(ifp); |
259 | } | |
260 | ||
b7b1bfce HFS |
261 | static void addrconf_mod_rs_timer(struct inet6_dev *idev, |
262 | unsigned long when) | |
263 | { | |
264 | if (!timer_pending(&idev->rs_timer)) | |
265 | in6_dev_hold(idev); | |
266 | mod_timer(&idev->rs_timer, jiffies + when); | |
267 | } | |
1da177e4 | 268 | |
c15b1cca HFS |
269 | static void addrconf_mod_dad_work(struct inet6_ifaddr *ifp, |
270 | unsigned long delay) | |
1da177e4 | 271 | { |
c15b1cca | 272 | if (!delayed_work_pending(&ifp->dad_work)) |
1da177e4 | 273 | in6_ifa_hold(ifp); |
c15b1cca | 274 | mod_delayed_work(addrconf_wq, &ifp->dad_work, delay); |
1da177e4 LT |
275 | } |
276 | ||
7f7d9a6b HX |
277 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
278 | { | |
827da44c JS |
279 | int i; |
280 | ||
698365fa WC |
281 | idev->stats.ipv6 = alloc_percpu(struct ipstats_mib); |
282 | if (!idev->stats.ipv6) | |
7f7d9a6b | 283 | goto err_ip; |
827da44c JS |
284 | |
285 | for_each_possible_cpu(i) { | |
286 | struct ipstats_mib *addrconf_stats; | |
698365fa | 287 | addrconf_stats = per_cpu_ptr(idev->stats.ipv6, i); |
827da44c | 288 | u64_stats_init(&addrconf_stats->syncp); |
827da44c JS |
289 | } |
290 | ||
291 | ||
be281e55 ED |
292 | idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device), |
293 | GFP_KERNEL); | |
294 | if (!idev->stats.icmpv6dev) | |
7f7d9a6b | 295 | goto err_icmp; |
be281e55 ED |
296 | idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device), |
297 | GFP_KERNEL); | |
298 | if (!idev->stats.icmpv6msgdev) | |
14878f75 | 299 | goto err_icmpmsg; |
7f7d9a6b HX |
300 | |
301 | return 0; | |
302 | ||
14878f75 | 303 | err_icmpmsg: |
be281e55 | 304 | kfree(idev->stats.icmpv6dev); |
7f7d9a6b | 305 | err_icmp: |
698365fa | 306 | free_percpu(idev->stats.ipv6); |
7f7d9a6b | 307 | err_ip: |
aaf70ec7 | 308 | return -ENOMEM; |
7f7d9a6b HX |
309 | } |
310 | ||
8e5e8f30 | 311 | static struct inet6_dev *ipv6_add_dev(struct net_device *dev) |
1da177e4 LT |
312 | { |
313 | struct inet6_dev *ndev; | |
a317a2f1 | 314 | int err = -ENOMEM; |
1da177e4 LT |
315 | |
316 | ASSERT_RTNL(); | |
317 | ||
318 | if (dev->mtu < IPV6_MIN_MTU) | |
a317a2f1 | 319 | return ERR_PTR(-EINVAL); |
1da177e4 | 320 | |
1ab1457c | 321 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
1ab1457c | 322 | if (ndev == NULL) |
a317a2f1 | 323 | return ERR_PTR(err); |
322f74a4 IO |
324 | |
325 | rwlock_init(&ndev->lock); | |
326 | ndev->dev = dev; | |
502a2ffd | 327 | INIT_LIST_HEAD(&ndev->addr_list); |
b7b1bfce HFS |
328 | setup_timer(&ndev->rs_timer, addrconf_rs_timer, |
329 | (unsigned long)ndev); | |
c346dca1 | 330 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
322f74a4 IO |
331 | ndev->cnf.mtu6 = dev->mtu; |
332 | ndev->cnf.sysctl = NULL; | |
333 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
334 | if (ndev->nd_parms == NULL) { | |
335 | kfree(ndev); | |
a317a2f1 | 336 | return ERR_PTR(err); |
322f74a4 | 337 | } |
0187bdfb BH |
338 | if (ndev->cnf.forwarding) |
339 | dev_disable_lro(dev); | |
322f74a4 IO |
340 | /* We refer to the device */ |
341 | dev_hold(dev); | |
1da177e4 | 342 | |
322f74a4 | 343 | if (snmp6_alloc_dev(ndev) < 0) { |
ba3542e1 | 344 | ADBG(KERN_WARNING |
f3213831 | 345 | "%s: cannot allocate memory for statistics; dev=%s.\n", |
ba3542e1 | 346 | __func__, dev->name); |
322f74a4 | 347 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
8603e33d RL |
348 | dev_put(dev); |
349 | kfree(ndev); | |
a317a2f1 | 350 | return ERR_PTR(err); |
322f74a4 | 351 | } |
1da177e4 | 352 | |
322f74a4 | 353 | if (snmp6_register_dev(ndev) < 0) { |
ba3542e1 | 354 | ADBG(KERN_WARNING |
f3213831 | 355 | "%s: cannot create /proc/net/dev_snmp6/%s\n", |
ba3542e1 | 356 | __func__, dev->name); |
a317a2f1 | 357 | goto err_release; |
322f74a4 IO |
358 | } |
359 | ||
360 | /* One reference from device. We must do this before | |
361 | * we invoke __ipv6_regen_rndid(). | |
362 | */ | |
363 | in6_dev_hold(ndev); | |
1da177e4 | 364 | |
1b34be74 YH |
365 | if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) |
366 | ndev->cnf.accept_dad = -1; | |
367 | ||
07a93626 | 368 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
b077d7ab | 369 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { |
f3213831 | 370 | pr_info("%s: Disabled Multicast RS\n", dev->name); |
b077d7ab YH |
371 | ndev->cnf.rtr_solicits = 0; |
372 | } | |
373 | #endif | |
374 | ||
372e6c8f | 375 | INIT_LIST_HEAD(&ndev->tempaddr_list); |
b24b8a24 | 376 | setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
322f74a4 IO |
377 | if ((dev->flags&IFF_LOOPBACK) || |
378 | dev->type == ARPHRD_TUNNEL || | |
9625ed72 | 379 | dev->type == ARPHRD_TUNNEL6 || |
0be669bb | 380 | dev->type == ARPHRD_SIT || |
0be669bb | 381 | dev->type == ARPHRD_NONE) { |
322f74a4 IO |
382 | ndev->cnf.use_tempaddr = -1; |
383 | } else { | |
384 | in6_dev_hold(ndev); | |
385 | ipv6_regen_rndid((unsigned long) ndev); | |
386 | } | |
5d9efa7e | 387 | |
914faa14 | 388 | ndev->token = in6addr_any; |
1da177e4 | 389 | |
f24e3d65 | 390 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
53aadcc9 HX |
391 | ndev->if_flags |= IF_READY; |
392 | ||
322f74a4 IO |
393 | ipv6_mc_init_dev(ndev); |
394 | ndev->tstamp = jiffies; | |
a317a2f1 WC |
395 | err = addrconf_sysctl_register(ndev); |
396 | if (err) { | |
397 | ipv6_mc_destroy_dev(ndev); | |
398 | del_timer(&ndev->regen_timer); | |
399 | goto err_release; | |
400 | } | |
30c4cf57 | 401 | /* protected by rtnl_lock */ |
cf778b00 | 402 | rcu_assign_pointer(dev->ip6_ptr, ndev); |
d88ae4cc | 403 | |
2c5e8933 HFS |
404 | /* Join interface-local all-node multicast group */ |
405 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allnodes); | |
406 | ||
d88ae4cc | 407 | /* Join all-node multicast group */ |
f3ee4010 | 408 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
d88ae4cc | 409 | |
d6ddef9e | 410 | /* Join all-router multicast group if forwarding is set */ |
8b2aaede | 411 | if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST)) |
d6ddef9e LW |
412 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
413 | ||
1da177e4 | 414 | return ndev; |
a317a2f1 WC |
415 | |
416 | err_release: | |
417 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
418 | ndev->dead = 1; | |
419 | in6_dev_finish_destroy(ndev); | |
420 | return ERR_PTR(err); | |
1da177e4 LT |
421 | } |
422 | ||
8e5e8f30 | 423 | static struct inet6_dev *ipv6_find_idev(struct net_device *dev) |
1da177e4 LT |
424 | { |
425 | struct inet6_dev *idev; | |
426 | ||
427 | ASSERT_RTNL(); | |
428 | ||
e21e8467 SH |
429 | idev = __in6_dev_get(dev); |
430 | if (!idev) { | |
431 | idev = ipv6_add_dev(dev); | |
a317a2f1 | 432 | if (IS_ERR(idev)) |
1da177e4 LT |
433 | return NULL; |
434 | } | |
c5e33bdd | 435 | |
1da177e4 LT |
436 | if (dev->flags&IFF_UP) |
437 | ipv6_mc_up(idev); | |
438 | return idev; | |
439 | } | |
440 | ||
f3a1bfb1 ND |
441 | static int inet6_netconf_msgsize_devconf(int type) |
442 | { | |
443 | int size = NLMSG_ALIGN(sizeof(struct netconfmsg)) | |
444 | + nla_total_size(4); /* NETCONFA_IFINDEX */ | |
445 | ||
76f8f6cb ND |
446 | /* type -1 is used for ALL */ |
447 | if (type == -1 || type == NETCONFA_FORWARDING) | |
f3a1bfb1 | 448 | size += nla_total_size(4); |
b1afce95 | 449 | #ifdef CONFIG_IPV6_MROUTE |
d67b8c61 ND |
450 | if (type == -1 || type == NETCONFA_MC_FORWARDING) |
451 | size += nla_total_size(4); | |
b1afce95 | 452 | #endif |
c92d5491 | 453 | if (type == -1 || type == NETCONFA_PROXY_NEIGH) |
454 | size += nla_total_size(4); | |
f3a1bfb1 ND |
455 | |
456 | return size; | |
457 | } | |
458 | ||
459 | static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex, | |
460 | struct ipv6_devconf *devconf, u32 portid, | |
461 | u32 seq, int event, unsigned int flags, | |
462 | int type) | |
463 | { | |
464 | struct nlmsghdr *nlh; | |
465 | struct netconfmsg *ncm; | |
466 | ||
467 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg), | |
468 | flags); | |
469 | if (nlh == NULL) | |
470 | return -EMSGSIZE; | |
471 | ||
472 | ncm = nlmsg_data(nlh); | |
473 | ncm->ncm_family = AF_INET6; | |
474 | ||
475 | if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0) | |
476 | goto nla_put_failure; | |
477 | ||
76f8f6cb ND |
478 | /* type -1 is used for ALL */ |
479 | if ((type == -1 || type == NETCONFA_FORWARDING) && | |
f3a1bfb1 ND |
480 | nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0) |
481 | goto nla_put_failure; | |
b1afce95 | 482 | #ifdef CONFIG_IPV6_MROUTE |
d67b8c61 ND |
483 | if ((type == -1 || type == NETCONFA_MC_FORWARDING) && |
484 | nla_put_s32(skb, NETCONFA_MC_FORWARDING, | |
485 | devconf->mc_forwarding) < 0) | |
486 | goto nla_put_failure; | |
b1afce95 | 487 | #endif |
c92d5491 | 488 | if ((type == -1 || type == NETCONFA_PROXY_NEIGH) && |
489 | nla_put_s32(skb, NETCONFA_PROXY_NEIGH, devconf->proxy_ndp) < 0) | |
490 | goto nla_put_failure; | |
491 | ||
f3a1bfb1 ND |
492 | return nlmsg_end(skb, nlh); |
493 | ||
494 | nla_put_failure: | |
495 | nlmsg_cancel(skb, nlh); | |
496 | return -EMSGSIZE; | |
497 | } | |
498 | ||
d67b8c61 ND |
499 | void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex, |
500 | struct ipv6_devconf *devconf) | |
f3a1bfb1 ND |
501 | { |
502 | struct sk_buff *skb; | |
503 | int err = -ENOBUFS; | |
504 | ||
505 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(type), GFP_ATOMIC); | |
506 | if (skb == NULL) | |
507 | goto errout; | |
508 | ||
509 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, 0, 0, | |
510 | RTM_NEWNETCONF, 0, type); | |
511 | if (err < 0) { | |
512 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
513 | WARN_ON(err == -EMSGSIZE); | |
514 | kfree_skb(skb); | |
515 | goto errout; | |
516 | } | |
517 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_NETCONF, NULL, GFP_ATOMIC); | |
518 | return; | |
519 | errout: | |
bd779028 | 520 | rtnl_set_sk_err(net, RTNLGRP_IPV6_NETCONF, err); |
f3a1bfb1 ND |
521 | } |
522 | ||
76f8f6cb ND |
523 | static const struct nla_policy devconf_ipv6_policy[NETCONFA_MAX+1] = { |
524 | [NETCONFA_IFINDEX] = { .len = sizeof(int) }, | |
525 | [NETCONFA_FORWARDING] = { .len = sizeof(int) }, | |
c92d5491 | 526 | [NETCONFA_PROXY_NEIGH] = { .len = sizeof(int) }, |
76f8f6cb ND |
527 | }; |
528 | ||
529 | static int inet6_netconf_get_devconf(struct sk_buff *in_skb, | |
661d2967 | 530 | struct nlmsghdr *nlh) |
76f8f6cb ND |
531 | { |
532 | struct net *net = sock_net(in_skb->sk); | |
533 | struct nlattr *tb[NETCONFA_MAX+1]; | |
534 | struct netconfmsg *ncm; | |
535 | struct sk_buff *skb; | |
536 | struct ipv6_devconf *devconf; | |
537 | struct inet6_dev *in6_dev; | |
538 | struct net_device *dev; | |
539 | int ifindex; | |
540 | int err; | |
541 | ||
542 | err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX, | |
543 | devconf_ipv6_policy); | |
544 | if (err < 0) | |
545 | goto errout; | |
546 | ||
547 | err = EINVAL; | |
548 | if (!tb[NETCONFA_IFINDEX]) | |
549 | goto errout; | |
550 | ||
551 | ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]); | |
552 | switch (ifindex) { | |
553 | case NETCONFA_IFINDEX_ALL: | |
554 | devconf = net->ipv6.devconf_all; | |
555 | break; | |
556 | case NETCONFA_IFINDEX_DEFAULT: | |
557 | devconf = net->ipv6.devconf_dflt; | |
558 | break; | |
559 | default: | |
560 | dev = __dev_get_by_index(net, ifindex); | |
561 | if (dev == NULL) | |
562 | goto errout; | |
563 | in6_dev = __in6_dev_get(dev); | |
564 | if (in6_dev == NULL) | |
565 | goto errout; | |
566 | devconf = &in6_dev->cnf; | |
567 | break; | |
568 | } | |
569 | ||
570 | err = -ENOBUFS; | |
571 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(-1), GFP_ATOMIC); | |
572 | if (skb == NULL) | |
573 | goto errout; | |
574 | ||
575 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, | |
576 | NETLINK_CB(in_skb).portid, | |
577 | nlh->nlmsg_seq, RTM_NEWNETCONF, 0, | |
578 | -1); | |
579 | if (err < 0) { | |
580 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
581 | WARN_ON(err == -EMSGSIZE); | |
582 | kfree_skb(skb); | |
583 | goto errout; | |
584 | } | |
585 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); | |
586 | errout: | |
587 | return err; | |
588 | } | |
589 | ||
7a674200 ND |
590 | static int inet6_netconf_dump_devconf(struct sk_buff *skb, |
591 | struct netlink_callback *cb) | |
592 | { | |
593 | struct net *net = sock_net(skb->sk); | |
594 | int h, s_h; | |
595 | int idx, s_idx; | |
596 | struct net_device *dev; | |
597 | struct inet6_dev *idev; | |
598 | struct hlist_head *head; | |
599 | ||
600 | s_h = cb->args[0]; | |
601 | s_idx = idx = cb->args[1]; | |
602 | ||
603 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
604 | idx = 0; | |
605 | head = &net->dev_index_head[h]; | |
606 | rcu_read_lock(); | |
63998ac2 ND |
607 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ |
608 | net->dev_base_seq; | |
7a674200 ND |
609 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
610 | if (idx < s_idx) | |
611 | goto cont; | |
612 | idev = __in6_dev_get(dev); | |
613 | if (!idev) | |
614 | goto cont; | |
615 | ||
616 | if (inet6_netconf_fill_devconf(skb, dev->ifindex, | |
617 | &idev->cnf, | |
618 | NETLINK_CB(cb->skb).portid, | |
619 | cb->nlh->nlmsg_seq, | |
620 | RTM_NEWNETCONF, | |
621 | NLM_F_MULTI, | |
622 | -1) <= 0) { | |
623 | rcu_read_unlock(); | |
624 | goto done; | |
625 | } | |
63998ac2 | 626 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
7a674200 ND |
627 | cont: |
628 | idx++; | |
629 | } | |
630 | rcu_read_unlock(); | |
631 | } | |
632 | if (h == NETDEV_HASHENTRIES) { | |
633 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL, | |
634 | net->ipv6.devconf_all, | |
635 | NETLINK_CB(cb->skb).portid, | |
636 | cb->nlh->nlmsg_seq, | |
637 | RTM_NEWNETCONF, NLM_F_MULTI, | |
638 | -1) <= 0) | |
639 | goto done; | |
640 | else | |
641 | h++; | |
642 | } | |
643 | if (h == NETDEV_HASHENTRIES + 1) { | |
644 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT, | |
645 | net->ipv6.devconf_dflt, | |
646 | NETLINK_CB(cb->skb).portid, | |
647 | cb->nlh->nlmsg_seq, | |
648 | RTM_NEWNETCONF, NLM_F_MULTI, | |
649 | -1) <= 0) | |
650 | goto done; | |
651 | else | |
652 | h++; | |
653 | } | |
654 | done: | |
655 | cb->args[0] = h; | |
656 | cb->args[1] = idx; | |
657 | ||
658 | return skb->len; | |
659 | } | |
660 | ||
1da177e4 LT |
661 | #ifdef CONFIG_SYSCTL |
662 | static void dev_forward_change(struct inet6_dev *idev) | |
663 | { | |
664 | struct net_device *dev; | |
665 | struct inet6_ifaddr *ifa; | |
1da177e4 LT |
666 | |
667 | if (!idev) | |
668 | return; | |
669 | dev = idev->dev; | |
0187bdfb BH |
670 | if (idev->cnf.forwarding) |
671 | dev_disable_lro(dev); | |
1a940835 | 672 | if (dev->flags & IFF_MULTICAST) { |
2c5e8933 | 673 | if (idev->cnf.forwarding) { |
f3ee4010 | 674 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
675 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allrouters); |
676 | ipv6_dev_mc_inc(dev, &in6addr_sitelocal_allrouters); | |
677 | } else { | |
f3ee4010 | 678 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
679 | ipv6_dev_mc_dec(dev, &in6addr_interfacelocal_allrouters); |
680 | ipv6_dev_mc_dec(dev, &in6addr_sitelocal_allrouters); | |
681 | } | |
1da177e4 | 682 | } |
502a2ffd | 683 | |
684 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
2c12a74c MW |
685 | if (ifa->flags&IFA_F_TENTATIVE) |
686 | continue; | |
1da177e4 LT |
687 | if (idev->cnf.forwarding) |
688 | addrconf_join_anycast(ifa); | |
689 | else | |
690 | addrconf_leave_anycast(ifa); | |
691 | } | |
f3a1bfb1 ND |
692 | inet6_netconf_notify_devconf(dev_net(dev), NETCONFA_FORWARDING, |
693 | dev->ifindex, &idev->cnf); | |
1da177e4 LT |
694 | } |
695 | ||
696 | ||
e186932b | 697 | static void addrconf_forward_change(struct net *net, __s32 newf) |
1da177e4 LT |
698 | { |
699 | struct net_device *dev; | |
700 | struct inet6_dev *idev; | |
701 | ||
4acd4945 | 702 | for_each_netdev(net, dev) { |
1da177e4 LT |
703 | idev = __in6_dev_get(dev); |
704 | if (idev) { | |
e186932b PE |
705 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
706 | idev->cnf.forwarding = newf; | |
1da177e4 LT |
707 | if (changed) |
708 | dev_forward_change(idev); | |
709 | } | |
1da177e4 | 710 | } |
1da177e4 | 711 | } |
c8fecf22 | 712 | |
013d97e9 | 713 | static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf) |
c8fecf22 | 714 | { |
bff16c2f | 715 | struct net *net; |
013d97e9 FR |
716 | int old; |
717 | ||
718 | if (!rtnl_trylock()) | |
719 | return restart_syscall(); | |
bff16c2f PE |
720 | |
721 | net = (struct net *)table->extra2; | |
013d97e9 FR |
722 | old = *p; |
723 | *p = newf; | |
b325fddb | 724 | |
013d97e9 | 725 | if (p == &net->ipv6.devconf_dflt->forwarding) { |
f3a1bfb1 ND |
726 | if ((!newf) ^ (!old)) |
727 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
728 | NETCONFA_IFINDEX_DEFAULT, | |
729 | net->ipv6.devconf_dflt); | |
013d97e9 FR |
730 | rtnl_unlock(); |
731 | return 0; | |
88af182e | 732 | } |
c8fecf22 | 733 | |
e186932b | 734 | if (p == &net->ipv6.devconf_all->forwarding) { |
e186932b PE |
735 | net->ipv6.devconf_dflt->forwarding = newf; |
736 | addrconf_forward_change(net, newf); | |
f3a1bfb1 ND |
737 | if ((!newf) ^ (!old)) |
738 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
739 | NETCONFA_IFINDEX_ALL, | |
740 | net->ipv6.devconf_all); | |
013d97e9 | 741 | } else if ((!newf) ^ (!old)) |
c8fecf22 | 742 | dev_forward_change((struct inet6_dev *)table->extra1); |
0187bdfb | 743 | rtnl_unlock(); |
c8fecf22 | 744 | |
013d97e9 | 745 | if (newf) |
7b4da532 | 746 | rt6_purge_dflt_routers(net); |
b325fddb | 747 | return 1; |
c8fecf22 | 748 | } |
1da177e4 LT |
749 | #endif |
750 | ||
5c578aed | 751 | /* Nobody refers to this ifaddr, destroy it */ |
1da177e4 LT |
752 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) |
753 | { | |
c2e21293 | 754 | WARN_ON(!hlist_unhashed(&ifp->addr_lst)); |
547b792c | 755 | |
1da177e4 | 756 | #ifdef NET_REFCNT_DEBUG |
91df42be | 757 | pr_debug("%s\n", __func__); |
1da177e4 LT |
758 | #endif |
759 | ||
760 | in6_dev_put(ifp->idev); | |
761 | ||
c15b1cca HFS |
762 | if (cancel_delayed_work(&ifp->dad_work)) |
763 | pr_notice("delayed DAD work was pending while freeing ifa=%p\n", | |
764 | ifp); | |
1da177e4 | 765 | |
e9d3e084 | 766 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
f3213831 | 767 | pr_warn("Freeing alive inet6 address %p\n", ifp); |
1da177e4 LT |
768 | return; |
769 | } | |
94e187c0 | 770 | ip6_rt_put(ifp->rt); |
1da177e4 | 771 | |
e5785985 | 772 | kfree_rcu(ifp, rcu); |
1da177e4 LT |
773 | } |
774 | ||
e55ffac6 BH |
775 | static void |
776 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
777 | { | |
502a2ffd | 778 | struct list_head *p; |
8a6ce0c0 | 779 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
780 | |
781 | /* | |
782 | * Each device address list is sorted in order of scope - | |
783 | * global before linklocal. | |
784 | */ | |
502a2ffd | 785 | list_for_each(p, &idev->addr_list) { |
786 | struct inet6_ifaddr *ifa | |
787 | = list_entry(p, struct inet6_ifaddr, if_list); | |
8a6ce0c0 | 788 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
789 | break; |
790 | } | |
791 | ||
b54c9b98 | 792 | list_add_tail(&ifp->if_list, p); |
e55ffac6 BH |
793 | } |
794 | ||
ddbe5032 | 795 | static u32 inet6_addr_hash(const struct in6_addr *addr) |
3eb84f49 | 796 | { |
ddbe5032 | 797 | return hash_32(ipv6_addr_hash(addr), IN6_ADDR_HSIZE_SHIFT); |
3eb84f49 YH |
798 | } |
799 | ||
1da177e4 LT |
800 | /* On success it returns ifp with increased reference count */ |
801 | ||
802 | static struct inet6_ifaddr * | |
3f8f5298 JP |
803 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
804 | const struct in6_addr *peer_addr, int pfxlen, | |
8a226b2c | 805 | int scope, u32 flags, u32 valid_lft, u32 prefered_lft) |
1da177e4 LT |
806 | { |
807 | struct inet6_ifaddr *ifa = NULL; | |
808 | struct rt6_info *rt; | |
3a88a81d | 809 | unsigned int hash; |
1da177e4 | 810 | int err = 0; |
d68b8270 YH |
811 | int addr_type = ipv6_addr_type(addr); |
812 | ||
813 | if (addr_type == IPV6_ADDR_ANY || | |
814 | addr_type & IPV6_ADDR_MULTICAST || | |
815 | (!(idev->dev->flags & IFF_LOOPBACK) && | |
816 | addr_type & IPV6_ADDR_LOOPBACK)) | |
817 | return ERR_PTR(-EADDRNOTAVAIL); | |
1da177e4 | 818 | |
8814c4b5 | 819 | rcu_read_lock_bh(); |
1da177e4 LT |
820 | if (idev->dead) { |
821 | err = -ENODEV; /*XXX*/ | |
822 | goto out2; | |
823 | } | |
824 | ||
56d417b1 | 825 | if (idev->cnf.disable_ipv6) { |
9bdd8d40 BH |
826 | err = -EACCES; |
827 | goto out2; | |
828 | } | |
829 | ||
5c578aed | 830 | spin_lock(&addrconf_hash_lock); |
1da177e4 LT |
831 | |
832 | /* Ignore adding duplicate addresses on an interface */ | |
c346dca1 | 833 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
ba3542e1 | 834 | ADBG("ipv6_add_addr: already assigned\n"); |
1da177e4 LT |
835 | err = -EEXIST; |
836 | goto out; | |
837 | } | |
838 | ||
322f74a4 | 839 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
840 | |
841 | if (ifa == NULL) { | |
ba3542e1 | 842 | ADBG("ipv6_add_addr: malloc failed\n"); |
1da177e4 LT |
843 | err = -ENOBUFS; |
844 | goto out; | |
845 | } | |
846 | ||
8f031519 | 847 | rt = addrconf_dst_alloc(idev, addr, false); |
1da177e4 LT |
848 | if (IS_ERR(rt)) { |
849 | err = PTR_ERR(rt); | |
850 | goto out; | |
851 | } | |
852 | ||
bba24896 JP |
853 | neigh_parms_data_state_setall(idev->nd_parms); |
854 | ||
4e3fd7a0 | 855 | ifa->addr = *addr; |
3f8f5298 JP |
856 | if (peer_addr) |
857 | ifa->peer_addr = *peer_addr; | |
1da177e4 LT |
858 | |
859 | spin_lock_init(&ifa->lock); | |
e9d3e084 | 860 | spin_lock_init(&ifa->state_lock); |
c15b1cca | 861 | INIT_DELAYED_WORK(&ifa->dad_work, addrconf_dad_work); |
c2e21293 | 862 | INIT_HLIST_NODE(&ifa->addr_lst); |
1da177e4 LT |
863 | ifa->scope = scope; |
864 | ifa->prefix_len = pfxlen; | |
865 | ifa->flags = flags | IFA_F_TENTATIVE; | |
8a226b2c JB |
866 | ifa->valid_lft = valid_lft; |
867 | ifa->prefered_lft = prefered_lft; | |
1da177e4 | 868 | ifa->cstamp = ifa->tstamp = jiffies; |
617fe29d | 869 | ifa->tokenized = false; |
1da177e4 | 870 | |
57f5f544 KF |
871 | ifa->rt = rt; |
872 | ||
1da177e4 LT |
873 | ifa->idev = idev; |
874 | in6_dev_hold(idev); | |
875 | /* For caller */ | |
876 | in6_ifa_hold(ifa); | |
877 | ||
878 | /* Add to big hash table */ | |
ddbe5032 | 879 | hash = inet6_addr_hash(addr); |
1da177e4 | 880 | |
5c578aed | 881 | hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]); |
5c578aed | 882 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
883 | |
884 | write_lock(&idev->lock); | |
885 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 886 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 | 887 | |
1da177e4 | 888 | if (ifa->flags&IFA_F_TEMPORARY) { |
372e6c8f | 889 | list_add(&ifa->tmp_list, &idev->tempaddr_list); |
1da177e4 LT |
890 | in6_ifa_hold(ifa); |
891 | } | |
1da177e4 | 892 | |
1da177e4 LT |
893 | in6_ifa_hold(ifa); |
894 | write_unlock(&idev->lock); | |
895 | out2: | |
8814c4b5 | 896 | rcu_read_unlock_bh(); |
1da177e4 | 897 | |
fd92833a | 898 | if (likely(err == 0)) |
f88c91dd | 899 | inet6addr_notifier_call_chain(NETDEV_UP, ifa); |
1da177e4 LT |
900 | else { |
901 | kfree(ifa); | |
902 | ifa = ERR_PTR(err); | |
903 | } | |
904 | ||
905 | return ifa; | |
906 | out: | |
5c578aed | 907 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
908 | goto out2; |
909 | } | |
910 | ||
5b84efec TH |
911 | enum cleanup_prefix_rt_t { |
912 | CLEANUP_PREFIX_RT_NOP, /* no cleanup action for prefix route */ | |
913 | CLEANUP_PREFIX_RT_DEL, /* delete the prefix route */ | |
914 | CLEANUP_PREFIX_RT_EXPIRE, /* update the lifetime of the prefix route */ | |
915 | }; | |
916 | ||
917 | /* | |
918 | * Check, whether the prefix for ifp would still need a prefix route | |
919 | * after deleting ifp. The function returns one of the CLEANUP_PREFIX_RT_* | |
920 | * constants. | |
921 | * | |
922 | * 1) we don't purge prefix if address was not permanent. | |
923 | * prefix is managed by its own lifetime. | |
924 | * 2) we also don't purge, if the address was IFA_F_NOPREFIXROUTE. | |
925 | * 3) if there are no addresses, delete prefix. | |
926 | * 4) if there are still other permanent address(es), | |
927 | * corresponding prefix is still permanent. | |
928 | * 5) if there are still other addresses with IFA_F_NOPREFIXROUTE, | |
929 | * don't purge the prefix, assume user space is managing it. | |
930 | * 6) otherwise, update prefix lifetime to the | |
931 | * longest valid lifetime among the corresponding | |
932 | * addresses on the device. | |
933 | * Note: subsequent RA will update lifetime. | |
934 | **/ | |
935 | static enum cleanup_prefix_rt_t | |
936 | check_cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long *expires) | |
937 | { | |
938 | struct inet6_ifaddr *ifa; | |
939 | struct inet6_dev *idev = ifp->idev; | |
940 | unsigned long lifetime; | |
941 | enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_DEL; | |
942 | ||
943 | *expires = jiffies; | |
944 | ||
945 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
946 | if (ifa == ifp) | |
947 | continue; | |
948 | if (!ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
949 | ifp->prefix_len)) | |
950 | continue; | |
951 | if (ifa->flags & (IFA_F_PERMANENT | IFA_F_NOPREFIXROUTE)) | |
952 | return CLEANUP_PREFIX_RT_NOP; | |
953 | ||
954 | action = CLEANUP_PREFIX_RT_EXPIRE; | |
955 | ||
956 | spin_lock(&ifa->lock); | |
957 | ||
958 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); | |
959 | /* | |
960 | * Note: Because this address is | |
961 | * not permanent, lifetime < | |
962 | * LONG_MAX / HZ here. | |
963 | */ | |
964 | if (time_before(*expires, ifa->tstamp + lifetime * HZ)) | |
965 | *expires = ifa->tstamp + lifetime * HZ; | |
966 | spin_unlock(&ifa->lock); | |
967 | } | |
968 | ||
969 | return action; | |
970 | } | |
971 | ||
972 | static void | |
973 | cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long expires, bool del_rt) | |
974 | { | |
975 | struct rt6_info *rt; | |
976 | ||
977 | rt = addrconf_get_prefix_route(&ifp->addr, | |
978 | ifp->prefix_len, | |
979 | ifp->idev->dev, | |
980 | 0, RTF_GATEWAY | RTF_DEFAULT); | |
981 | if (rt) { | |
982 | if (del_rt) | |
983 | ip6_del_rt(rt); | |
984 | else { | |
985 | if (!(rt->rt6i_flags & RTF_EXPIRES)) | |
986 | rt6_set_expires(rt, expires); | |
987 | ip6_rt_put(rt); | |
988 | } | |
989 | } | |
990 | } | |
991 | ||
992 | ||
1da177e4 LT |
993 | /* This function wants to get referenced ifp and releases it before return */ |
994 | ||
995 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
996 | { | |
4c5ff6a6 | 997 | int state; |
5b84efec TH |
998 | enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_NOP; |
999 | unsigned long expires; | |
1da177e4 | 1000 | |
c15b1cca HFS |
1001 | ASSERT_RTNL(); |
1002 | ||
4c5ff6a6 HX |
1003 | spin_lock_bh(&ifp->state_lock); |
1004 | state = ifp->state; | |
e9d3e084 | 1005 | ifp->state = INET6_IFADDR_STATE_DEAD; |
4c5ff6a6 HX |
1006 | spin_unlock_bh(&ifp->state_lock); |
1007 | ||
1008 | if (state == INET6_IFADDR_STATE_DEAD) | |
1009 | goto out; | |
1da177e4 | 1010 | |
5c578aed | 1011 | spin_lock_bh(&addrconf_hash_lock); |
1012 | hlist_del_init_rcu(&ifp->addr_lst); | |
5c578aed | 1013 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 | 1014 | |
5b84efec | 1015 | write_lock_bh(&ifp->idev->lock); |
5d9efa7e | 1016 | |
1da177e4 | 1017 | if (ifp->flags&IFA_F_TEMPORARY) { |
372e6c8f | 1018 | list_del(&ifp->tmp_list); |
1019 | if (ifp->ifpub) { | |
1020 | in6_ifa_put(ifp->ifpub); | |
1021 | ifp->ifpub = NULL; | |
1da177e4 | 1022 | } |
372e6c8f | 1023 | __in6_ifa_put(ifp); |
1da177e4 | 1024 | } |
1da177e4 | 1025 | |
5b84efec TH |
1026 | if (ifp->flags & IFA_F_PERMANENT && !(ifp->flags & IFA_F_NOPREFIXROUTE)) |
1027 | action = check_cleanup_prefix_route(ifp, &expires); | |
502a2ffd | 1028 | |
5b84efec TH |
1029 | list_del_init(&ifp->if_list); |
1030 | __in6_ifa_put(ifp); | |
1031 | ||
1032 | write_unlock_bh(&ifp->idev->lock); | |
1da177e4 | 1033 | |
c15b1cca | 1034 | addrconf_del_dad_work(ifp); |
b2238566 | 1035 | |
1da177e4 LT |
1036 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
1037 | ||
f88c91dd | 1038 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifp); |
1da177e4 | 1039 | |
5b84efec TH |
1040 | if (action != CLEANUP_PREFIX_RT_NOP) { |
1041 | cleanup_prefix_route(ifp, expires, | |
1042 | action == CLEANUP_PREFIX_RT_DEL); | |
1da177e4 LT |
1043 | } |
1044 | ||
c3968a85 DW |
1045 | /* clean up prefsrc entries */ |
1046 | rt6_remove_prefsrc(ifp); | |
4c5ff6a6 | 1047 | out: |
1da177e4 LT |
1048 | in6_ifa_put(ifp); |
1049 | } | |
1050 | ||
1da177e4 LT |
1051 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) |
1052 | { | |
1053 | struct inet6_dev *idev = ifp->idev; | |
1054 | struct in6_addr addr, *tmpaddr; | |
76f793e3 | 1055 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age; |
eac55bf9 | 1056 | unsigned long regen_advance; |
1da177e4 LT |
1057 | int tmp_plen; |
1058 | int ret = 0; | |
95c385b4 | 1059 | u32 addr_flags; |
76f793e3 | 1060 | unsigned long now = jiffies; |
1da177e4 | 1061 | |
53bd6749 | 1062 | write_lock_bh(&idev->lock); |
1da177e4 LT |
1063 | if (ift) { |
1064 | spin_lock_bh(&ift->lock); | |
1065 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
1066 | spin_unlock_bh(&ift->lock); | |
1067 | tmpaddr = &addr; | |
1068 | } else { | |
1069 | tmpaddr = NULL; | |
1070 | } | |
1071 | retry: | |
1072 | in6_dev_hold(idev); | |
1073 | if (idev->cnf.use_tempaddr <= 0) { | |
53bd6749 | 1074 | write_unlock_bh(&idev->lock); |
f3213831 | 1075 | pr_info("%s: use_tempaddr is disabled\n", __func__); |
1da177e4 LT |
1076 | in6_dev_put(idev); |
1077 | ret = -1; | |
1078 | goto out; | |
1079 | } | |
1080 | spin_lock_bh(&ifp->lock); | |
1081 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
1082 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
1083 | spin_unlock_bh(&ifp->lock); | |
53bd6749 | 1084 | write_unlock_bh(&idev->lock); |
f3213831 JP |
1085 | pr_warn("%s: regeneration time exceeded - disabled temporary address support\n", |
1086 | __func__); | |
1da177e4 LT |
1087 | in6_dev_put(idev); |
1088 | ret = -1; | |
1089 | goto out; | |
1090 | } | |
1091 | in6_ifa_hold(ifp); | |
1092 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
eb7e0575 | 1093 | __ipv6_try_regen_rndid(idev, tmpaddr); |
1da177e4 | 1094 | memcpy(&addr.s6_addr[8], idev->rndid, 8); |
76f793e3 | 1095 | age = (now - ifp->tstamp) / HZ; |
1da177e4 LT |
1096 | tmp_valid_lft = min_t(__u32, |
1097 | ifp->valid_lft, | |
7a876b0e | 1098 | idev->cnf.temp_valid_lft + age); |
1ab1457c YH |
1099 | tmp_prefered_lft = min_t(__u32, |
1100 | ifp->prefered_lft, | |
7a876b0e | 1101 | idev->cnf.temp_prefered_lft + age - |
784e2710 | 1102 | idev->cnf.max_desync_factor); |
1da177e4 | 1103 | tmp_plen = ifp->prefix_len; |
1da177e4 LT |
1104 | tmp_tstamp = ifp->tstamp; |
1105 | spin_unlock_bh(&ifp->lock); | |
1106 | ||
eac55bf9 | 1107 | regen_advance = idev->cnf.regen_max_retry * |
7eaa48a4 | 1108 | idev->cnf.dad_transmits * |
1f9248e5 | 1109 | NEIGH_VAR(idev->nd_parms, RETRANS_TIME) / HZ; |
53bd6749 | 1110 | write_unlock_bh(&idev->lock); |
95c385b4 | 1111 | |
eac55bf9 BB |
1112 | /* A temporary address is created only if this calculated Preferred |
1113 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, | |
1114 | * an implementation must not create a temporary address with a zero | |
1115 | * Preferred Lifetime. | |
ecab6701 HK |
1116 | * Use age calculation as in addrconf_verify to avoid unnecessary |
1117 | * temporary addresses being generated. | |
eac55bf9 | 1118 | */ |
ecab6701 HK |
1119 | age = (now - tmp_tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; |
1120 | if (tmp_prefered_lft <= regen_advance + age) { | |
eac55bf9 BB |
1121 | in6_ifa_put(ifp); |
1122 | in6_dev_put(idev); | |
1123 | ret = -1; | |
1124 | goto out; | |
1125 | } | |
1126 | ||
95c385b4 NH |
1127 | addr_flags = IFA_F_TEMPORARY; |
1128 | /* set in addrconf_prefix_rcv() */ | |
1129 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
1130 | addr_flags |= IFA_F_OPTIMISTIC; | |
1131 | ||
4b08a8f1 HFS |
1132 | ift = ipv6_add_addr(idev, &addr, NULL, tmp_plen, |
1133 | ipv6_addr_scope(&addr), addr_flags, | |
1134 | tmp_valid_lft, tmp_prefered_lft); | |
1135 | if (IS_ERR(ift)) { | |
1da177e4 LT |
1136 | in6_ifa_put(ifp); |
1137 | in6_dev_put(idev); | |
f3213831 | 1138 | pr_info("%s: retry temporary address regeneration\n", __func__); |
1da177e4 | 1139 | tmpaddr = &addr; |
53bd6749 | 1140 | write_lock_bh(&idev->lock); |
1da177e4 LT |
1141 | goto retry; |
1142 | } | |
1143 | ||
1144 | spin_lock_bh(&ift->lock); | |
1145 | ift->ifpub = ifp; | |
76f793e3 | 1146 | ift->cstamp = now; |
1da177e4 LT |
1147 | ift->tstamp = tmp_tstamp; |
1148 | spin_unlock_bh(&ift->lock); | |
1149 | ||
cf22f9a2 | 1150 | addrconf_dad_start(ift); |
1da177e4 LT |
1151 | in6_ifa_put(ift); |
1152 | in6_dev_put(idev); | |
1153 | out: | |
1154 | return ret; | |
1155 | } | |
1da177e4 LT |
1156 | |
1157 | /* | |
072047e4 | 1158 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 1159 | */ |
a9b05723 YH |
1160 | enum { |
1161 | IPV6_SADDR_RULE_INIT = 0, | |
1162 | IPV6_SADDR_RULE_LOCAL, | |
1163 | IPV6_SADDR_RULE_SCOPE, | |
1164 | IPV6_SADDR_RULE_PREFERRED, | |
1165 | #ifdef CONFIG_IPV6_MIP6 | |
1166 | IPV6_SADDR_RULE_HOA, | |
1167 | #endif | |
1168 | IPV6_SADDR_RULE_OIF, | |
1169 | IPV6_SADDR_RULE_LABEL, | |
a9b05723 | 1170 | IPV6_SADDR_RULE_PRIVACY, |
a9b05723 YH |
1171 | IPV6_SADDR_RULE_ORCHID, |
1172 | IPV6_SADDR_RULE_PREFIX, | |
1173 | IPV6_SADDR_RULE_MAX | |
1174 | }; | |
1175 | ||
072047e4 | 1176 | struct ipv6_saddr_score { |
a9b05723 YH |
1177 | int rule; |
1178 | int addr_type; | |
1179 | struct inet6_ifaddr *ifa; | |
1180 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); | |
1181 | int scopedist; | |
1182 | int matchlen; | |
072047e4 YH |
1183 | }; |
1184 | ||
a9b05723 | 1185 | struct ipv6_saddr_dst { |
9acd9f3a | 1186 | const struct in6_addr *addr; |
a9b05723 YH |
1187 | int ifindex; |
1188 | int scope; | |
1189 | int label; | |
7cbca67c | 1190 | unsigned int prefs; |
a9b05723 | 1191 | }; |
072047e4 | 1192 | |
b6f99a21 | 1193 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 1194 | { |
45bb0060 | 1195 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK)) |
072047e4 YH |
1196 | return 1; |
1197 | return 0; | |
1da177e4 LT |
1198 | } |
1199 | ||
3de23255 BT |
1200 | static int ipv6_get_saddr_eval(struct net *net, |
1201 | struct ipv6_saddr_score *score, | |
a9b05723 YH |
1202 | struct ipv6_saddr_dst *dst, |
1203 | int i) | |
1204 | { | |
1205 | int ret; | |
1206 | ||
1207 | if (i <= score->rule) { | |
1208 | switch (i) { | |
1209 | case IPV6_SADDR_RULE_SCOPE: | |
1210 | ret = score->scopedist; | |
1211 | break; | |
1212 | case IPV6_SADDR_RULE_PREFIX: | |
1213 | ret = score->matchlen; | |
1214 | break; | |
1215 | default: | |
1216 | ret = !!test_bit(i, score->scorebits); | |
1217 | } | |
1218 | goto out; | |
1219 | } | |
1220 | ||
1221 | switch (i) { | |
1222 | case IPV6_SADDR_RULE_INIT: | |
1223 | /* Rule 0: remember if hiscore is not ready yet */ | |
1224 | ret = !!score->ifa; | |
1225 | break; | |
1226 | case IPV6_SADDR_RULE_LOCAL: | |
1227 | /* Rule 1: Prefer same address */ | |
1228 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); | |
1229 | break; | |
1230 | case IPV6_SADDR_RULE_SCOPE: | |
1231 | /* Rule 2: Prefer appropriate scope | |
1232 | * | |
1233 | * ret | |
1234 | * ^ | |
1235 | * -1 | d 15 | |
1236 | * ---+--+-+---> scope | |
1237 | * | | |
1238 | * | d is scope of the destination. | |
1239 | * B-d | \ | |
1240 | * | \ <- smaller scope is better if | |
db9c7c39 | 1241 | * B-15 | \ if scope is enough for destination. |
a9b05723 YH |
1242 | * | ret = B - scope (-1 <= scope >= d <= 15). |
1243 | * d-C-1 | / | |
1244 | * |/ <- greater is better | |
1245 | * -C / if scope is not enough for destination. | |
1246 | * /| ret = scope - C (-1 <= d < scope <= 15). | |
1247 | * | |
1248 | * d - C - 1 < B -15 (for all -1 <= d <= 15). | |
1249 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. | |
1250 | * Assume B = 0 and we get C > 29. | |
1251 | */ | |
1252 | ret = __ipv6_addr_src_scope(score->addr_type); | |
1253 | if (ret >= dst->scope) | |
1254 | ret = -ret; | |
1255 | else | |
1256 | ret -= 128; /* 30 is enough */ | |
1257 | score->scopedist = ret; | |
1258 | break; | |
1259 | case IPV6_SADDR_RULE_PREFERRED: | |
1260 | /* Rule 3: Avoid deprecated and optimistic addresses */ | |
1261 | ret = ipv6_saddr_preferred(score->addr_type) || | |
1262 | !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)); | |
1263 | break; | |
1264 | #ifdef CONFIG_IPV6_MIP6 | |
1265 | case IPV6_SADDR_RULE_HOA: | |
7cbca67c | 1266 | { |
a9b05723 | 1267 | /* Rule 4: Prefer home address */ |
7cbca67c YH |
1268 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
1269 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; | |
a9b05723 | 1270 | break; |
7cbca67c | 1271 | } |
a9b05723 YH |
1272 | #endif |
1273 | case IPV6_SADDR_RULE_OIF: | |
1274 | /* Rule 5: Prefer outgoing interface */ | |
1275 | ret = (!dst->ifindex || | |
1276 | dst->ifindex == score->ifa->idev->dev->ifindex); | |
1277 | break; | |
1278 | case IPV6_SADDR_RULE_LABEL: | |
1279 | /* Rule 6: Prefer matching label */ | |
3de23255 BT |
1280 | ret = ipv6_addr_label(net, |
1281 | &score->ifa->addr, score->addr_type, | |
a9b05723 YH |
1282 | score->ifa->idev->dev->ifindex) == dst->label; |
1283 | break; | |
a9b05723 | 1284 | case IPV6_SADDR_RULE_PRIVACY: |
7cbca67c | 1285 | { |
a9b05723 | 1286 | /* Rule 7: Prefer public address |
25985edc | 1287 | * Note: prefer temporary address if use_tempaddr >= 2 |
a9b05723 | 1288 | */ |
7cbca67c YH |
1289 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
1290 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : | |
1291 | score->ifa->idev->cnf.use_tempaddr >= 2; | |
1292 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; | |
a9b05723 | 1293 | break; |
7cbca67c | 1294 | } |
a9b05723 YH |
1295 | case IPV6_SADDR_RULE_ORCHID: |
1296 | /* Rule 8-: Prefer ORCHID vs ORCHID or | |
1297 | * non-ORCHID vs non-ORCHID | |
1298 | */ | |
1299 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ | |
1300 | ipv6_addr_orchid(dst->addr)); | |
1301 | break; | |
1302 | case IPV6_SADDR_RULE_PREFIX: | |
1303 | /* Rule 8: Use longest matching prefix */ | |
91b4b04f YH |
1304 | ret = ipv6_addr_diff(&score->ifa->addr, dst->addr); |
1305 | if (ret > score->ifa->prefix_len) | |
1306 | ret = score->ifa->prefix_len; | |
1307 | score->matchlen = ret; | |
a9b05723 YH |
1308 | break; |
1309 | default: | |
1310 | ret = 0; | |
1311 | } | |
1312 | ||
1313 | if (ret) | |
1314 | __set_bit(i, score->scorebits); | |
1315 | score->rule = i; | |
1316 | out: | |
1317 | return ret; | |
1318 | } | |
1319 | ||
b3f644fc | 1320 | int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev, |
9acd9f3a | 1321 | const struct in6_addr *daddr, unsigned int prefs, |
7cbca67c | 1322 | struct in6_addr *saddr) |
1da177e4 | 1323 | { |
a9b05723 YH |
1324 | struct ipv6_saddr_score scores[2], |
1325 | *score = &scores[0], *hiscore = &scores[1]; | |
a9b05723 | 1326 | struct ipv6_saddr_dst dst; |
072047e4 | 1327 | struct net_device *dev; |
a9b05723 | 1328 | int dst_type; |
1da177e4 | 1329 | |
a9b05723 YH |
1330 | dst_type = __ipv6_addr_type(daddr); |
1331 | dst.addr = daddr; | |
1332 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; | |
1333 | dst.scope = __ipv6_addr_src_scope(dst_type); | |
3de23255 | 1334 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
7cbca67c | 1335 | dst.prefs = prefs; |
a9b05723 YH |
1336 | |
1337 | hiscore->rule = -1; | |
1338 | hiscore->ifa = NULL; | |
1da177e4 | 1339 | |
8814c4b5 | 1340 | rcu_read_lock(); |
1da177e4 | 1341 | |
c6d14c84 | 1342 | for_each_netdev_rcu(net, dev) { |
072047e4 | 1343 | struct inet6_dev *idev; |
072047e4 | 1344 | |
a9b05723 | 1345 | /* Candidate Source Address (section 4) |
072047e4 YH |
1346 | * - multicast and link-local destination address, |
1347 | * the set of candidate source address MUST only | |
1348 | * include addresses assigned to interfaces | |
1349 | * belonging to the same link as the outgoing | |
1350 | * interface. | |
1351 | * (- For site-local destination addresses, the | |
1352 | * set of candidate source addresses MUST only | |
1353 | * include addresses assigned to interfaces | |
1354 | * belonging to the same site as the outgoing | |
1355 | * interface.) | |
1356 | */ | |
a9b05723 YH |
1357 | if (((dst_type & IPV6_ADDR_MULTICAST) || |
1358 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
1359 | dst.ifindex && dev->ifindex != dst.ifindex) | |
072047e4 | 1360 | continue; |
1da177e4 | 1361 | |
1da177e4 | 1362 | idev = __in6_dev_get(dev); |
072047e4 YH |
1363 | if (!idev) |
1364 | continue; | |
1365 | ||
1366 | read_lock_bh(&idev->lock); | |
502a2ffd | 1367 | list_for_each_entry(score->ifa, &idev->addr_list, if_list) { |
a9b05723 | 1368 | int i; |
072047e4 | 1369 | |
a9b05723 | 1370 | /* |
6b3ae80a YH |
1371 | * - Tentative Address (RFC2462 section 5.4) |
1372 | * - A tentative address is not considered | |
1373 | * "assigned to an interface" in the traditional | |
95c385b4 | 1374 | * sense, unless it is also flagged as optimistic. |
6b3ae80a | 1375 | * - Candidate Source Address (section 4) |
072047e4 YH |
1376 | * - In any case, anycast addresses, multicast |
1377 | * addresses, and the unspecified address MUST | |
1378 | * NOT be included in a candidate set. | |
1379 | */ | |
a9b05723 YH |
1380 | if ((score->ifa->flags & IFA_F_TENTATIVE) && |
1381 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) | |
6b3ae80a | 1382 | continue; |
a9b05723 YH |
1383 | |
1384 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); | |
1385 | ||
1386 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || | |
1387 | score->addr_type & IPV6_ADDR_MULTICAST)) { | |
072047e4 | 1388 | LIMIT_NETDEBUG(KERN_DEBUG |
3b6d821c | 1389 | "ADDRCONF: unspecified / multicast address " |
072047e4 YH |
1390 | "assigned as unicast address on %s", |
1391 | dev->name); | |
1392 | continue; | |
1393 | } | |
1394 | ||
a9b05723 YH |
1395 | score->rule = -1; |
1396 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); | |
1397 | ||
1398 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { | |
1399 | int minihiscore, miniscore; | |
1400 | ||
3de23255 BT |
1401 | minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i); |
1402 | miniscore = ipv6_get_saddr_eval(net, score, &dst, i); | |
a9b05723 YH |
1403 | |
1404 | if (minihiscore > miniscore) { | |
1405 | if (i == IPV6_SADDR_RULE_SCOPE && | |
1406 | score->scopedist > 0) { | |
1407 | /* | |
1408 | * special case: | |
1409 | * each remaining entry | |
1410 | * has too small (not enough) | |
1411 | * scope, because ifa entries | |
1412 | * are sorted by their scope | |
1413 | * values. | |
1414 | */ | |
1415 | goto try_nextdev; | |
1416 | } | |
1417 | break; | |
1418 | } else if (minihiscore < miniscore) { | |
a9b05723 YH |
1419 | if (hiscore->ifa) |
1420 | in6_ifa_put(hiscore->ifa); | |
1421 | ||
1422 | in6_ifa_hold(score->ifa); | |
1423 | ||
a0bffffc | 1424 | swap(hiscore, score); |
a9b05723 YH |
1425 | |
1426 | /* restore our iterator */ | |
1427 | score->ifa = hiscore->ifa; | |
1428 | ||
1429 | break; | |
1da177e4 | 1430 | } |
072047e4 | 1431 | } |
1da177e4 | 1432 | } |
a9b05723 | 1433 | try_nextdev: |
072047e4 | 1434 | read_unlock_bh(&idev->lock); |
1da177e4 | 1435 | } |
8814c4b5 | 1436 | rcu_read_unlock(); |
1da177e4 | 1437 | |
a9b05723 | 1438 | if (!hiscore->ifa) |
072047e4 | 1439 | return -EADDRNOTAVAIL; |
1ab1457c | 1440 | |
4e3fd7a0 | 1441 | *saddr = hiscore->ifa->addr; |
a9b05723 | 1442 | in6_ifa_put(hiscore->ifa); |
072047e4 | 1443 | return 0; |
1da177e4 | 1444 | } |
5e5f3f0f | 1445 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
1da177e4 | 1446 | |
8965779d | 1447 | int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, |
479840ff | 1448 | u32 banned_flags) |
b7b1bfce HFS |
1449 | { |
1450 | struct inet6_ifaddr *ifp; | |
1451 | int err = -EADDRNOTAVAIL; | |
1452 | ||
602582ca HFS |
1453 | list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) { |
1454 | if (ifp->scope > IFA_LINK) | |
1455 | break; | |
b7b1bfce HFS |
1456 | if (ifp->scope == IFA_LINK && |
1457 | !(ifp->flags & banned_flags)) { | |
1458 | *addr = ifp->addr; | |
1459 | err = 0; | |
1460 | break; | |
1461 | } | |
1462 | } | |
1463 | return err; | |
1464 | } | |
1465 | ||
95c385b4 | 1466 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
479840ff | 1467 | u32 banned_flags) |
1da177e4 LT |
1468 | { |
1469 | struct inet6_dev *idev; | |
1470 | int err = -EADDRNOTAVAIL; | |
1471 | ||
8814c4b5 | 1472 | rcu_read_lock(); |
e21e8467 SH |
1473 | idev = __in6_dev_get(dev); |
1474 | if (idev) { | |
1da177e4 | 1475 | read_lock_bh(&idev->lock); |
b7b1bfce | 1476 | err = __ipv6_get_lladdr(idev, addr, banned_flags); |
1da177e4 LT |
1477 | read_unlock_bh(&idev->lock); |
1478 | } | |
8814c4b5 | 1479 | rcu_read_unlock(); |
1da177e4 LT |
1480 | return err; |
1481 | } | |
1482 | ||
1483 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1484 | { | |
1485 | int cnt = 0; | |
1486 | struct inet6_ifaddr *ifp; | |
1487 | ||
1488 | read_lock_bh(&idev->lock); | |
502a2ffd | 1489 | list_for_each_entry(ifp, &idev->addr_list, if_list) |
1da177e4 LT |
1490 | cnt++; |
1491 | read_unlock_bh(&idev->lock); | |
1492 | return cnt; | |
1493 | } | |
1494 | ||
b71d1d42 | 1495 | int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
2a7851bf | 1496 | const struct net_device *dev, int strict) |
1da177e4 | 1497 | { |
eedf042a | 1498 | struct inet6_ifaddr *ifp; |
ddbe5032 | 1499 | unsigned int hash = inet6_addr_hash(addr); |
1da177e4 | 1500 | |
5c578aed | 1501 | rcu_read_lock_bh(); |
b67bfe0d | 1502 | hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1503 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
bfeade08 | 1504 | continue; |
1da177e4 | 1505 | if (ipv6_addr_equal(&ifp->addr, addr) && |
eedf042a SH |
1506 | !(ifp->flags&IFA_F_TENTATIVE) && |
1507 | (dev == NULL || ifp->idev->dev == dev || | |
1508 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) { | |
1509 | rcu_read_unlock_bh(); | |
1510 | return 1; | |
1da177e4 LT |
1511 | } |
1512 | } | |
5c578aed | 1513 | |
eedf042a SH |
1514 | rcu_read_unlock_bh(); |
1515 | return 0; | |
1da177e4 | 1516 | } |
7159039a YH |
1517 | EXPORT_SYMBOL(ipv6_chk_addr); |
1518 | ||
3e81c6da DM |
1519 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
1520 | struct net_device *dev) | |
1da177e4 | 1521 | { |
ddbe5032 | 1522 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 1523 | struct inet6_ifaddr *ifp; |
1da177e4 | 1524 | |
b67bfe0d | 1525 | hlist_for_each_entry(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1526 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
06bfe655 | 1527 | continue; |
1da177e4 LT |
1528 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1529 | if (dev == NULL || ifp->idev->dev == dev) | |
3e81c6da | 1530 | return true; |
1da177e4 LT |
1531 | } |
1532 | } | |
3e81c6da | 1533 | return false; |
1da177e4 LT |
1534 | } |
1535 | ||
7df37ff3 CB |
1536 | /* Compares an address/prefix_len with addresses on device @dev. |
1537 | * If one is found it returns true. | |
1538 | */ | |
1539 | bool ipv6_chk_custom_prefix(const struct in6_addr *addr, | |
1540 | const unsigned int prefix_len, struct net_device *dev) | |
1541 | { | |
1542 | struct inet6_dev *idev; | |
1543 | struct inet6_ifaddr *ifa; | |
1544 | bool ret = false; | |
1545 | ||
1546 | rcu_read_lock(); | |
1547 | idev = __in6_dev_get(dev); | |
1548 | if (idev) { | |
1549 | read_lock_bh(&idev->lock); | |
1550 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
1551 | ret = ipv6_prefix_equal(addr, &ifa->addr, prefix_len); | |
1552 | if (ret) | |
1553 | break; | |
1554 | } | |
1555 | read_unlock_bh(&idev->lock); | |
1556 | } | |
1557 | rcu_read_unlock(); | |
1558 | ||
1559 | return ret; | |
1560 | } | |
1561 | EXPORT_SYMBOL(ipv6_chk_custom_prefix); | |
1562 | ||
b71d1d42 | 1563 | int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev) |
52eeeb84 YH |
1564 | { |
1565 | struct inet6_dev *idev; | |
1566 | struct inet6_ifaddr *ifa; | |
1567 | int onlink; | |
1568 | ||
1569 | onlink = 0; | |
1570 | rcu_read_lock(); | |
1571 | idev = __in6_dev_get(dev); | |
1572 | if (idev) { | |
1573 | read_lock_bh(&idev->lock); | |
502a2ffd | 1574 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
52eeeb84 YH |
1575 | onlink = ipv6_prefix_equal(addr, &ifa->addr, |
1576 | ifa->prefix_len); | |
1577 | if (onlink) | |
1578 | break; | |
1579 | } | |
1580 | read_unlock_bh(&idev->lock); | |
1581 | } | |
1582 | rcu_read_unlock(); | |
1583 | return onlink; | |
1584 | } | |
52eeeb84 YH |
1585 | EXPORT_SYMBOL(ipv6_chk_prefix); |
1586 | ||
9acd9f3a | 1587 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, |
1cab3da6 | 1588 | struct net_device *dev, int strict) |
1da177e4 | 1589 | { |
b79d1d54 | 1590 | struct inet6_ifaddr *ifp, *result = NULL; |
ddbe5032 | 1591 | unsigned int hash = inet6_addr_hash(addr); |
1da177e4 | 1592 | |
5c578aed | 1593 | rcu_read_lock_bh(); |
b67bfe0d | 1594 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1595 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
1cab3da6 | 1596 | continue; |
1da177e4 LT |
1597 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1598 | if (dev == NULL || ifp->idev->dev == dev || | |
1599 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
b79d1d54 | 1600 | result = ifp; |
1da177e4 LT |
1601 | in6_ifa_hold(ifp); |
1602 | break; | |
1603 | } | |
1604 | } | |
1605 | } | |
5c578aed | 1606 | rcu_read_unlock_bh(); |
1da177e4 | 1607 | |
b79d1d54 | 1608 | return result; |
1da177e4 LT |
1609 | } |
1610 | ||
1da177e4 LT |
1611 | /* Gets referenced address, destroys ifaddr */ |
1612 | ||
cc411d0b | 1613 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) |
1da177e4 | 1614 | { |
1da177e4 LT |
1615 | if (ifp->flags&IFA_F_PERMANENT) { |
1616 | spin_lock_bh(&ifp->lock); | |
c15b1cca | 1617 | addrconf_del_dad_work(ifp); |
1da177e4 | 1618 | ifp->flags |= IFA_F_TENTATIVE; |
cc411d0b BH |
1619 | if (dad_failed) |
1620 | ifp->flags |= IFA_F_DADFAILED; | |
1da177e4 | 1621 | spin_unlock_bh(&ifp->lock); |
e2577a06 HX |
1622 | if (dad_failed) |
1623 | ipv6_ifa_notify(0, ifp); | |
1da177e4 | 1624 | in6_ifa_put(ifp); |
1da177e4 LT |
1625 | } else if (ifp->flags&IFA_F_TEMPORARY) { |
1626 | struct inet6_ifaddr *ifpub; | |
1627 | spin_lock_bh(&ifp->lock); | |
1628 | ifpub = ifp->ifpub; | |
1629 | if (ifpub) { | |
1630 | in6_ifa_hold(ifpub); | |
1631 | spin_unlock_bh(&ifp->lock); | |
1632 | ipv6_create_tempaddr(ifpub, ifp); | |
1633 | in6_ifa_put(ifpub); | |
1634 | } else { | |
1635 | spin_unlock_bh(&ifp->lock); | |
1636 | } | |
1637 | ipv6_del_addr(ifp); | |
c15b1cca | 1638 | } else { |
1da177e4 | 1639 | ipv6_del_addr(ifp); |
c15b1cca | 1640 | } |
1da177e4 LT |
1641 | } |
1642 | ||
f2344a13 HX |
1643 | static int addrconf_dad_end(struct inet6_ifaddr *ifp) |
1644 | { | |
1645 | int err = -ENOENT; | |
1646 | ||
c15b1cca | 1647 | spin_lock_bh(&ifp->state_lock); |
f2344a13 HX |
1648 | if (ifp->state == INET6_IFADDR_STATE_DAD) { |
1649 | ifp->state = INET6_IFADDR_STATE_POSTDAD; | |
1650 | err = 0; | |
1651 | } | |
c15b1cca | 1652 | spin_unlock_bh(&ifp->state_lock); |
f2344a13 HX |
1653 | |
1654 | return err; | |
1655 | } | |
1656 | ||
3c21edbd YH |
1657 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1658 | { | |
1b34be74 | 1659 | struct inet6_dev *idev = ifp->idev; |
9bdd8d40 | 1660 | |
853dc2e0 UB |
1661 | if (addrconf_dad_end(ifp)) { |
1662 | in6_ifa_put(ifp); | |
f2344a13 | 1663 | return; |
853dc2e0 | 1664 | } |
f2344a13 | 1665 | |
e87cc472 JP |
1666 | net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n", |
1667 | ifp->idev->dev->name, &ifp->addr); | |
9bdd8d40 | 1668 | |
1b34be74 YH |
1669 | if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) { |
1670 | struct in6_addr addr; | |
1671 | ||
1672 | addr.s6_addr32[0] = htonl(0xfe800000); | |
1673 | addr.s6_addr32[1] = 0; | |
1674 | ||
1675 | if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && | |
1676 | ipv6_addr_equal(&ifp->addr, &addr)) { | |
1677 | /* DAD failed for link-local based on MAC address */ | |
1678 | idev->cnf.disable_ipv6 = 1; | |
9bdd8d40 | 1679 | |
f3213831 | 1680 | pr_info("%s: IPv6 being disabled!\n", |
9bdd8d40 | 1681 | ifp->idev->dev->name); |
1b34be74 YH |
1682 | } |
1683 | } | |
1684 | ||
c15b1cca HFS |
1685 | spin_lock_bh(&ifp->state_lock); |
1686 | /* transition from _POSTDAD to _ERRDAD */ | |
1687 | ifp->state = INET6_IFADDR_STATE_ERRDAD; | |
1688 | spin_unlock_bh(&ifp->state_lock); | |
1689 | ||
1690 | addrconf_mod_dad_work(ifp, 0); | |
3c21edbd | 1691 | } |
1da177e4 | 1692 | |
a9ed4a29 SD |
1693 | /* Join to solicited addr multicast group. |
1694 | * caller must hold RTNL */ | |
b71d1d42 | 1695 | void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 LT |
1696 | { |
1697 | struct in6_addr maddr; | |
1698 | ||
1699 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1700 | return; | |
1701 | ||
1702 | addrconf_addr_solict_mult(addr, &maddr); | |
1703 | ipv6_dev_mc_inc(dev, &maddr); | |
1704 | } | |
1705 | ||
a9ed4a29 | 1706 | /* caller must hold RTNL */ |
b71d1d42 | 1707 | void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
1708 | { |
1709 | struct in6_addr maddr; | |
1710 | ||
1711 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1712 | return; | |
1713 | ||
1714 | addrconf_addr_solict_mult(addr, &maddr); | |
1715 | __ipv6_dev_mc_dec(idev, &maddr); | |
1716 | } | |
1717 | ||
a9ed4a29 | 1718 | /* caller must hold RTNL */ |
20380731 | 1719 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1720 | { |
1721 | struct in6_addr addr; | |
c15b1cca | 1722 | |
88ad3149 | 1723 | if (ifp->prefix_len >= 127) /* RFC 6164 */ |
2bda8a0c | 1724 | return; |
1da177e4 LT |
1725 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
1726 | if (ipv6_addr_any(&addr)) | |
1727 | return; | |
1728 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1729 | } | |
1730 | ||
a9ed4a29 | 1731 | /* caller must hold RTNL */ |
20380731 | 1732 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1733 | { |
1734 | struct in6_addr addr; | |
c15b1cca | 1735 | |
88ad3149 | 1736 | if (ifp->prefix_len >= 127) /* RFC 6164 */ |
32019e65 | 1737 | return; |
1da177e4 LT |
1738 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
1739 | if (ipv6_addr_any(&addr)) | |
1740 | return; | |
1741 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1742 | } | |
1743 | ||
073a8e0e YH |
1744 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1745 | { | |
1746 | if (dev->addr_len != ETH_ALEN) | |
1747 | return -1; | |
1748 | memcpy(eui, dev->dev_addr, 3); | |
1749 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1750 | ||
1751 | /* | |
1752 | * The zSeries OSA network cards can be shared among various | |
1753 | * OS instances, but the OSA cards have only one MAC address. | |
1754 | * This leads to duplicate address conflicts in conjunction | |
1755 | * with IPv6 if more than one instance uses the same card. | |
1756 | * | |
1757 | * The driver for these cards can deliver a unique 16-bit | |
1758 | * identifier for each instance sharing the same card. It is | |
1759 | * placed instead of 0xFFFE in the interface identifier. The | |
1760 | * "u" bit of the interface identifier is not inverted in this | |
1761 | * case. Hence the resulting interface identifier has local | |
1762 | * scope according to RFC2373. | |
1763 | */ | |
1764 | if (dev->dev_id) { | |
1765 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1766 | eui[4] = dev->dev_id & 0xFF; | |
1767 | } else { | |
1768 | eui[3] = 0xFF; | |
1769 | eui[4] = 0xFE; | |
1770 | eui[0] ^= 2; | |
1771 | } | |
1772 | return 0; | |
1773 | } | |
1774 | ||
06a4c1c5 | 1775 | static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev) |
1776 | { | |
1777 | if (dev->addr_len != IEEE802154_ADDR_LEN) | |
1778 | return -1; | |
1779 | memcpy(eui, dev->dev_addr, 8); | |
5e98a36e | 1780 | eui[0] ^= 2; |
06a4c1c5 | 1781 | return 0; |
1782 | } | |
1783 | ||
cb6bf355 YH |
1784 | static int addrconf_ifid_ieee1394(u8 *eui, struct net_device *dev) |
1785 | { | |
1786 | union fwnet_hwaddr *ha; | |
1787 | ||
1788 | if (dev->addr_len != FWNET_ALEN) | |
1789 | return -1; | |
1790 | ||
1791 | ha = (union fwnet_hwaddr *)dev->dev_addr; | |
1792 | ||
1793 | memcpy(eui, &ha->uc.uniq_id, sizeof(ha->uc.uniq_id)); | |
1794 | eui[0] ^= 2; | |
1795 | return 0; | |
1796 | } | |
1797 | ||
073a8e0e YH |
1798 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) |
1799 | { | |
1800 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1801 | if (dev->addr_len != ARCNET_ALEN) | |
1802 | return -1; | |
1803 | memset(eui, 0, 7); | |
8e5e8f30 | 1804 | eui[7] = *(u8 *)dev->dev_addr; |
073a8e0e YH |
1805 | return 0; |
1806 | } | |
1807 | ||
1808 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1809 | { | |
1810 | if (dev->addr_len != INFINIBAND_ALEN) | |
1811 | return -1; | |
1812 | memcpy(eui, dev->dev_addr + 12, 8); | |
1813 | eui[0] |= 2; | |
1814 | return 0; | |
1815 | } | |
1816 | ||
c61393ea | 1817 | static int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
dfd982ba | 1818 | { |
9af28511 SH |
1819 | if (addr == 0) |
1820 | return -1; | |
dfd982ba YH |
1821 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || |
1822 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || | |
1823 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || | |
1824 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || | |
1825 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || | |
1826 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; | |
1827 | eui[1] = 0; | |
1828 | eui[2] = 0x5E; | |
1829 | eui[3] = 0xFE; | |
1830 | memcpy(eui + 4, &addr, 4); | |
1831 | return 0; | |
1832 | } | |
dfd982ba YH |
1833 | |
1834 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) | |
1835 | { | |
1836 | if (dev->priv_flags & IFF_ISATAP) | |
1837 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1838 | return -1; | |
1839 | } | |
1840 | ||
aee80b54 | 1841 | static int addrconf_ifid_gre(u8 *eui, struct net_device *dev) |
1842 | { | |
1843 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1844 | } | |
1845 | ||
e837735e ND |
1846 | static int addrconf_ifid_ip6tnl(u8 *eui, struct net_device *dev) |
1847 | { | |
1848 | memcpy(eui, dev->perm_addr, 3); | |
1849 | memcpy(eui + 5, dev->perm_addr + 3, 3); | |
1850 | eui[3] = 0xFF; | |
1851 | eui[4] = 0xFE; | |
1852 | eui[0] ^= 2; | |
1853 | return 0; | |
1854 | } | |
1855 | ||
1da177e4 LT |
1856 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1857 | { | |
1858 | switch (dev->type) { | |
1859 | case ARPHRD_ETHER: | |
1860 | case ARPHRD_FDDI: | |
073a8e0e | 1861 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1862 | case ARPHRD_ARCNET: |
073a8e0e | 1863 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1864 | case ARPHRD_INFINIBAND: |
073a8e0e | 1865 | return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0 | 1866 | case ARPHRD_SIT: |
dfd982ba | 1867 | return addrconf_ifid_sit(eui, dev); |
aee80b54 | 1868 | case ARPHRD_IPGRE: |
1869 | return addrconf_ifid_gre(eui, dev); | |
e74bccb8 | 1870 | case ARPHRD_6LOWPAN: |
06a4c1c5 | 1871 | case ARPHRD_IEEE802154: |
1872 | return addrconf_ifid_eui64(eui, dev); | |
cb6bf355 YH |
1873 | case ARPHRD_IEEE1394: |
1874 | return addrconf_ifid_ieee1394(eui, dev); | |
e837735e ND |
1875 | case ARPHRD_TUNNEL6: |
1876 | return addrconf_ifid_ip6tnl(eui, dev); | |
1da177e4 LT |
1877 | } |
1878 | return -1; | |
1879 | } | |
1880 | ||
1881 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1882 | { | |
1883 | int err = -1; | |
1884 | struct inet6_ifaddr *ifp; | |
1885 | ||
1886 | read_lock_bh(&idev->lock); | |
602582ca HFS |
1887 | list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) { |
1888 | if (ifp->scope > IFA_LINK) | |
1889 | break; | |
1da177e4 LT |
1890 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { |
1891 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1892 | err = 0; | |
1893 | break; | |
1894 | } | |
1895 | } | |
1896 | read_unlock_bh(&idev->lock); | |
1897 | return err; | |
1898 | } | |
1899 | ||
1da177e4 | 1900 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ |
eb7e0575 | 1901 | static void __ipv6_regen_rndid(struct inet6_dev *idev) |
1da177e4 | 1902 | { |
1da177e4 | 1903 | regen: |
955189ef | 1904 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1905 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1906 | |
1907 | /* | |
1908 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1909 | * check if generated address is not inappropriate | |
1910 | * | |
1911 | * - Reserved subnet anycast (RFC 2526) | |
1912 | * 11111101 11....11 1xxxxxxx | |
c7dc89c0 | 1913 | * - ISATAP (RFC4214) 6.1 |
1da177e4 LT |
1914 | * 00-00-5E-FE-xx-xx-xx-xx |
1915 | * - value 0 | |
1916 | * - XXX: already assigned to an address on the device | |
1917 | */ | |
1ab1457c | 1918 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
1919 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
1920 | (idev->rndid[7]&0x80)) | |
1921 | goto regen; | |
1922 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1923 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1924 | goto regen; | |
1925 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1926 | goto regen; | |
1927 | } | |
1da177e4 LT |
1928 | } |
1929 | ||
1930 | static void ipv6_regen_rndid(unsigned long data) | |
1931 | { | |
1932 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1933 | unsigned long expires; | |
1934 | ||
8814c4b5 | 1935 | rcu_read_lock_bh(); |
1da177e4 LT |
1936 | write_lock_bh(&idev->lock); |
1937 | ||
1938 | if (idev->dead) | |
1939 | goto out; | |
1940 | ||
eb7e0575 | 1941 | __ipv6_regen_rndid(idev); |
1ab1457c | 1942 | |
1da177e4 | 1943 | expires = jiffies + |
1ab1457c | 1944 | idev->cnf.temp_prefered_lft * HZ - |
1f9248e5 JP |
1945 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * |
1946 | NEIGH_VAR(idev->nd_parms, RETRANS_TIME) - | |
784e2710 | 1947 | idev->cnf.max_desync_factor * HZ; |
1da177e4 | 1948 | if (time_before(expires, jiffies)) { |
f3213831 JP |
1949 | pr_warn("%s: too short regeneration interval; timer disabled for %s\n", |
1950 | __func__, idev->dev->name); | |
1da177e4 LT |
1951 | goto out; |
1952 | } | |
1953 | ||
1954 | if (!mod_timer(&idev->regen_timer, expires)) | |
1955 | in6_dev_hold(idev); | |
1956 | ||
1957 | out: | |
1958 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 1959 | rcu_read_unlock_bh(); |
1da177e4 LT |
1960 | in6_dev_put(idev); |
1961 | } | |
1962 | ||
eb7e0575 | 1963 | static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) |
8e5e8f30 | 1964 | { |
1da177e4 | 1965 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) |
eb7e0575 | 1966 | __ipv6_regen_rndid(idev); |
1da177e4 | 1967 | } |
1da177e4 LT |
1968 | |
1969 | /* | |
1970 | * Add prefix route. | |
1971 | */ | |
1972 | ||
1973 | static void | |
1974 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1975 | unsigned long expires, u32 flags) |
1da177e4 | 1976 | { |
86872cb5 TG |
1977 | struct fib6_config cfg = { |
1978 | .fc_table = RT6_TABLE_PREFIX, | |
1979 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1980 | .fc_ifindex = dev->ifindex, | |
1981 | .fc_expires = expires, | |
1982 | .fc_dst_len = plen, | |
1983 | .fc_flags = RTF_UP | flags, | |
c346dca1 | 1984 | .fc_nlinfo.nl_net = dev_net(dev), |
f410a1fb | 1985 | .fc_protocol = RTPROT_KERNEL, |
86872cb5 | 1986 | }; |
1da177e4 | 1987 | |
4e3fd7a0 | 1988 | cfg.fc_dst = *pfx; |
1da177e4 LT |
1989 | |
1990 | /* Prevent useless cloning on PtP SIT. | |
1991 | This thing is done here expecting that the whole | |
1992 | class of non-broadcast devices need not cloning. | |
1993 | */ | |
07a93626 | 1994 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
86872cb5 TG |
1995 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
1996 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 1997 | #endif |
1da177e4 | 1998 | |
86872cb5 | 1999 | ip6_route_add(&cfg); |
1da177e4 LT |
2000 | } |
2001 | ||
14ef37b6 AH |
2002 | |
2003 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, | |
2004 | int plen, | |
2005 | const struct net_device *dev, | |
2006 | u32 flags, u32 noflags) | |
2007 | { | |
2008 | struct fib6_node *fn; | |
2009 | struct rt6_info *rt = NULL; | |
2010 | struct fib6_table *table; | |
2011 | ||
2012 | table = fib6_get_table(dev_net(dev), RT6_TABLE_PREFIX); | |
2013 | if (table == NULL) | |
2014 | return NULL; | |
2015 | ||
5744dd9b | 2016 | read_lock_bh(&table->tb6_lock); |
14ef37b6 AH |
2017 | fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0); |
2018 | if (!fn) | |
2019 | goto out; | |
2020 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { | |
d1918542 | 2021 | if (rt->dst.dev->ifindex != dev->ifindex) |
14ef37b6 AH |
2022 | continue; |
2023 | if ((rt->rt6i_flags & flags) != flags) | |
2024 | continue; | |
85da53bf | 2025 | if ((rt->rt6i_flags & noflags) != 0) |
14ef37b6 AH |
2026 | continue; |
2027 | dst_hold(&rt->dst); | |
2028 | break; | |
2029 | } | |
2030 | out: | |
5744dd9b | 2031 | read_unlock_bh(&table->tb6_lock); |
14ef37b6 AH |
2032 | return rt; |
2033 | } | |
2034 | ||
2035 | ||
1da177e4 LT |
2036 | /* Create "default" multicast route to the interface */ |
2037 | ||
2038 | static void addrconf_add_mroute(struct net_device *dev) | |
2039 | { | |
86872cb5 TG |
2040 | struct fib6_config cfg = { |
2041 | .fc_table = RT6_TABLE_LOCAL, | |
2042 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
2043 | .fc_ifindex = dev->ifindex, | |
2044 | .fc_dst_len = 8, | |
2045 | .fc_flags = RTF_UP, | |
c346dca1 | 2046 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 TG |
2047 | }; |
2048 | ||
2049 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
2050 | ||
2051 | ip6_route_add(&cfg); | |
1da177e4 LT |
2052 | } |
2053 | ||
1da177e4 LT |
2054 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) |
2055 | { | |
2056 | struct inet6_dev *idev; | |
2057 | ||
2058 | ASSERT_RTNL(); | |
2059 | ||
e21e8467 SH |
2060 | idev = ipv6_find_idev(dev); |
2061 | if (!idev) | |
64e724f6 BH |
2062 | return ERR_PTR(-ENOBUFS); |
2063 | ||
2064 | if (idev->cnf.disable_ipv6) | |
2065 | return ERR_PTR(-EACCES); | |
1da177e4 LT |
2066 | |
2067 | /* Add default multicast route */ | |
4af04aba LW |
2068 | if (!(dev->flags & IFF_LOOPBACK)) |
2069 | addrconf_add_mroute(dev); | |
1da177e4 | 2070 | |
1da177e4 LT |
2071 | return idev; |
2072 | } | |
2073 | ||
53bd6749 JP |
2074 | static void manage_tempaddrs(struct inet6_dev *idev, |
2075 | struct inet6_ifaddr *ifp, | |
2076 | __u32 valid_lft, __u32 prefered_lft, | |
2077 | bool create, unsigned long now) | |
2078 | { | |
2079 | u32 flags; | |
2080 | struct inet6_ifaddr *ift; | |
2081 | ||
2082 | read_lock_bh(&idev->lock); | |
2083 | /* update all temporary addresses in the list */ | |
2084 | list_for_each_entry(ift, &idev->tempaddr_list, tmp_list) { | |
2085 | int age, max_valid, max_prefered; | |
2086 | ||
2087 | if (ifp != ift->ifpub) | |
2088 | continue; | |
2089 | ||
2090 | /* RFC 4941 section 3.3: | |
2091 | * If a received option will extend the lifetime of a public | |
2092 | * address, the lifetimes of temporary addresses should | |
2093 | * be extended, subject to the overall constraint that no | |
2094 | * temporary addresses should ever remain "valid" or "preferred" | |
2095 | * for a time longer than (TEMP_VALID_LIFETIME) or | |
2096 | * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), respectively. | |
2097 | */ | |
2098 | age = (now - ift->cstamp) / HZ; | |
2099 | max_valid = idev->cnf.temp_valid_lft - age; | |
2100 | if (max_valid < 0) | |
2101 | max_valid = 0; | |
2102 | ||
2103 | max_prefered = idev->cnf.temp_prefered_lft - | |
2104 | idev->cnf.max_desync_factor - age; | |
2105 | if (max_prefered < 0) | |
2106 | max_prefered = 0; | |
2107 | ||
2108 | if (valid_lft > max_valid) | |
2109 | valid_lft = max_valid; | |
2110 | ||
2111 | if (prefered_lft > max_prefered) | |
2112 | prefered_lft = max_prefered; | |
2113 | ||
2114 | spin_lock(&ift->lock); | |
2115 | flags = ift->flags; | |
2116 | ift->valid_lft = valid_lft; | |
2117 | ift->prefered_lft = prefered_lft; | |
2118 | ift->tstamp = now; | |
2119 | if (prefered_lft > 0) | |
2120 | ift->flags &= ~IFA_F_DEPRECATED; | |
2121 | ||
2122 | spin_unlock(&ift->lock); | |
2123 | if (!(flags&IFA_F_TENTATIVE)) | |
2124 | ipv6_ifa_notify(0, ift); | |
2125 | } | |
2126 | ||
2127 | if ((create || list_empty(&idev->tempaddr_list)) && | |
2128 | idev->cnf.use_tempaddr > 0) { | |
2129 | /* When a new public address is created as described | |
2130 | * in [ADDRCONF], also create a new temporary address. | |
2131 | * Also create a temporary address if it's enabled but | |
2132 | * no temporary address currently exists. | |
2133 | */ | |
2134 | read_unlock_bh(&idev->lock); | |
2135 | ipv6_create_tempaddr(ifp, NULL); | |
2136 | } else { | |
2137 | read_unlock_bh(&idev->lock); | |
2138 | } | |
2139 | } | |
2140 | ||
e6bff995 | 2141 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao) |
1da177e4 LT |
2142 | { |
2143 | struct prefix_info *pinfo; | |
2144 | __u32 valid_lft; | |
2145 | __u32 prefered_lft; | |
2146 | int addr_type; | |
1da177e4 | 2147 | struct inet6_dev *in6_dev; |
56d417b1 | 2148 | struct net *net = dev_net(dev); |
1da177e4 LT |
2149 | |
2150 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 2151 | |
1da177e4 | 2152 | if (len < sizeof(struct prefix_info)) { |
ba3542e1 | 2153 | ADBG("addrconf: prefix option too short\n"); |
1da177e4 LT |
2154 | return; |
2155 | } | |
1ab1457c | 2156 | |
1da177e4 LT |
2157 | /* |
2158 | * Validation checks ([ADDRCONF], page 19) | |
2159 | */ | |
2160 | ||
2161 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
2162 | ||
2163 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
2164 | return; | |
2165 | ||
2166 | valid_lft = ntohl(pinfo->valid); | |
2167 | prefered_lft = ntohl(pinfo->prefered); | |
2168 | ||
2169 | if (prefered_lft > valid_lft) { | |
e87cc472 | 2170 | net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n"); |
1da177e4 LT |
2171 | return; |
2172 | } | |
2173 | ||
2174 | in6_dev = in6_dev_get(dev); | |
2175 | ||
2176 | if (in6_dev == NULL) { | |
e87cc472 JP |
2177 | net_dbg_ratelimited("addrconf: device %s not configured\n", |
2178 | dev->name); | |
1da177e4 LT |
2179 | return; |
2180 | } | |
2181 | ||
2182 | /* | |
2183 | * Two things going on here: | |
2184 | * 1) Add routes for on-link prefixes | |
2185 | * 2) Configure prefixes with the auto flag set | |
2186 | */ | |
2187 | ||
4bed72e4 YH |
2188 | if (pinfo->onlink) { |
2189 | struct rt6_info *rt; | |
2190 | unsigned long rt_expires; | |
2191 | ||
6f704992 YH |
2192 | /* Avoid arithmetic overflow. Really, we could |
2193 | * save rt_expires in seconds, likely valid_lft, | |
2194 | * but it would require division in fib gc, that it | |
2195 | * not good. | |
2196 | */ | |
4bed72e4 YH |
2197 | if (HZ > USER_HZ) |
2198 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); | |
2199 | else | |
2200 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); | |
3dd4bc68 | 2201 | |
4bed72e4 YH |
2202 | if (addrconf_finite_timeout(rt_expires)) |
2203 | rt_expires *= HZ; | |
1da177e4 | 2204 | |
14ef37b6 AH |
2205 | rt = addrconf_get_prefix_route(&pinfo->prefix, |
2206 | pinfo->prefix_len, | |
2207 | dev, | |
2208 | RTF_ADDRCONF | RTF_PREFIX_RT, | |
2209 | RTF_GATEWAY | RTF_DEFAULT); | |
1da177e4 | 2210 | |
14ef37b6 | 2211 | if (rt) { |
6f704992 YH |
2212 | /* Autoconf prefix route */ |
2213 | if (valid_lft == 0) { | |
2214 | ip6_del_rt(rt); | |
2215 | rt = NULL; | |
4bed72e4 | 2216 | } else if (addrconf_finite_timeout(rt_expires)) { |
6f704992 | 2217 | /* not infinity */ |
1716a961 | 2218 | rt6_set_expires(rt, jiffies + rt_expires); |
6f704992 | 2219 | } else { |
1716a961 | 2220 | rt6_clean_expires(rt); |
1da177e4 LT |
2221 | } |
2222 | } else if (valid_lft) { | |
6f704992 | 2223 | clock_t expires = 0; |
4bed72e4 YH |
2224 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
2225 | if (addrconf_finite_timeout(rt_expires)) { | |
6f704992 YH |
2226 | /* not infinity */ |
2227 | flags |= RTF_EXPIRES; | |
2228 | expires = jiffies_to_clock_t(rt_expires); | |
2229 | } | |
1da177e4 | 2230 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
6f704992 | 2231 | dev, expires, flags); |
1da177e4 | 2232 | } |
94e187c0 | 2233 | ip6_rt_put(rt); |
1da177e4 LT |
2234 | } |
2235 | ||
2236 | /* Try to figure out our local address for this prefix */ | |
2237 | ||
2238 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
8e5e8f30 | 2239 | struct inet6_ifaddr *ifp; |
1da177e4 LT |
2240 | struct in6_addr addr; |
2241 | int create = 0, update_lft = 0; | |
617fe29d | 2242 | bool tokenized = false; |
1da177e4 LT |
2243 | |
2244 | if (pinfo->prefix_len == 64) { | |
2245 | memcpy(&addr, &pinfo->prefix, 8); | |
f53adae4 DB |
2246 | |
2247 | if (!ipv6_addr_any(&in6_dev->token)) { | |
2248 | read_lock_bh(&in6_dev->lock); | |
2249 | memcpy(addr.s6_addr + 8, | |
2250 | in6_dev->token.s6_addr + 8, 8); | |
2251 | read_unlock_bh(&in6_dev->lock); | |
617fe29d | 2252 | tokenized = true; |
f53adae4 DB |
2253 | } else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && |
2254 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1da177e4 LT |
2255 | in6_dev_put(in6_dev); |
2256 | return; | |
2257 | } | |
2258 | goto ok; | |
2259 | } | |
e87cc472 JP |
2260 | net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n", |
2261 | pinfo->prefix_len); | |
1da177e4 LT |
2262 | in6_dev_put(in6_dev); |
2263 | return; | |
2264 | ||
2265 | ok: | |
2266 | ||
53b7997f | 2267 | ifp = ipv6_get_ifaddr(net, &addr, dev, 1); |
1da177e4 LT |
2268 | |
2269 | if (ifp == NULL && valid_lft) { | |
2270 | int max_addresses = in6_dev->cnf.max_addresses; | |
95c385b4 NH |
2271 | u32 addr_flags = 0; |
2272 | ||
2273 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2274 | if (in6_dev->cnf.optimistic_dad && | |
e6bff995 | 2275 | !net->ipv6.devconf_all->forwarding && sllao) |
95c385b4 NH |
2276 | addr_flags = IFA_F_OPTIMISTIC; |
2277 | #endif | |
1da177e4 LT |
2278 | |
2279 | /* Do not allow to create too much of autoconfigured | |
2280 | * addresses; this would be too easy way to crash kernel. | |
2281 | */ | |
2282 | if (!max_addresses || | |
2283 | ipv6_count_addresses(in6_dev) < max_addresses) | |
3f8f5298 JP |
2284 | ifp = ipv6_add_addr(in6_dev, &addr, NULL, |
2285 | pinfo->prefix_len, | |
95c385b4 | 2286 | addr_type&IPV6_ADDR_SCOPE_MASK, |
8a226b2c JB |
2287 | addr_flags, valid_lft, |
2288 | prefered_lft); | |
1da177e4 | 2289 | |
3f0d2ba0 | 2290 | if (IS_ERR_OR_NULL(ifp)) { |
1da177e4 LT |
2291 | in6_dev_put(in6_dev); |
2292 | return; | |
2293 | } | |
2294 | ||
8a226b2c JB |
2295 | update_lft = 0; |
2296 | create = 1; | |
c15b1cca HFS |
2297 | spin_lock_bh(&ifp->lock); |
2298 | ifp->flags |= IFA_F_MANAGETEMPADDR; | |
1da177e4 | 2299 | ifp->cstamp = jiffies; |
617fe29d | 2300 | ifp->tokenized = tokenized; |
c15b1cca | 2301 | spin_unlock_bh(&ifp->lock); |
cf22f9a2 | 2302 | addrconf_dad_start(ifp); |
1da177e4 LT |
2303 | } |
2304 | ||
2305 | if (ifp) { | |
479840ff | 2306 | u32 flags; |
1da177e4 | 2307 | unsigned long now; |
1da177e4 LT |
2308 | u32 stored_lft; |
2309 | ||
2310 | /* update lifetime (RFC2462 5.5.3 e) */ | |
2311 | spin_lock(&ifp->lock); | |
2312 | now = jiffies; | |
2313 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
2314 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
2315 | else | |
2316 | stored_lft = 0; | |
8a226b2c | 2317 | if (!update_lft && !create && stored_lft) { |
c9d55d5b PM |
2318 | const u32 minimum_lft = min( |
2319 | stored_lft, (u32)MIN_VALID_LIFETIME); | |
2320 | valid_lft = max(valid_lft, minimum_lft); | |
2321 | ||
2322 | /* RFC4862 Section 5.5.3e: | |
2323 | * "Note that the preferred lifetime of the | |
2324 | * corresponding address is always reset to | |
2325 | * the Preferred Lifetime in the received | |
2326 | * Prefix Information option, regardless of | |
2327 | * whether the valid lifetime is also reset or | |
2328 | * ignored." | |
2329 | * | |
2330 | * So we should always update prefered_lft here. | |
2331 | */ | |
2332 | update_lft = 1; | |
1da177e4 LT |
2333 | } |
2334 | ||
2335 | if (update_lft) { | |
2336 | ifp->valid_lft = valid_lft; | |
2337 | ifp->prefered_lft = prefered_lft; | |
2338 | ifp->tstamp = now; | |
2339 | flags = ifp->flags; | |
2340 | ifp->flags &= ~IFA_F_DEPRECATED; | |
2341 | spin_unlock(&ifp->lock); | |
2342 | ||
2343 | if (!(flags&IFA_F_TENTATIVE)) | |
2344 | ipv6_ifa_notify(0, ifp); | |
2345 | } else | |
2346 | spin_unlock(&ifp->lock); | |
2347 | ||
53bd6749 JP |
2348 | manage_tempaddrs(in6_dev, ifp, valid_lft, prefered_lft, |
2349 | create, now); | |
5d9efa7e | 2350 | |
1da177e4 | 2351 | in6_ifa_put(ifp); |
c15b1cca | 2352 | addrconf_verify(); |
1da177e4 LT |
2353 | } |
2354 | } | |
2355 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
2356 | in6_dev_put(in6_dev); | |
2357 | } | |
2358 | ||
2359 | /* | |
2360 | * Set destination address. | |
2361 | * Special case for SIT interfaces where we create a new "virtual" | |
2362 | * device. | |
2363 | */ | |
af284937 | 2364 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2365 | { |
2366 | struct in6_ifreq ireq; | |
2367 | struct net_device *dev; | |
2368 | int err = -EINVAL; | |
2369 | ||
2370 | rtnl_lock(); | |
2371 | ||
2372 | err = -EFAULT; | |
2373 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2374 | goto err_exit; | |
2375 | ||
af284937 | 2376 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
1da177e4 LT |
2377 | |
2378 | err = -ENODEV; | |
2379 | if (dev == NULL) | |
2380 | goto err_exit; | |
2381 | ||
07a93626 | 2382 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 | 2383 | if (dev->type == ARPHRD_SIT) { |
5bc3eb7e | 2384 | const struct net_device_ops *ops = dev->netdev_ops; |
1da177e4 | 2385 | struct ifreq ifr; |
1da177e4 LT |
2386 | struct ip_tunnel_parm p; |
2387 | ||
2388 | err = -EADDRNOTAVAIL; | |
2389 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
2390 | goto err_exit; | |
2391 | ||
2392 | memset(&p, 0, sizeof(p)); | |
2393 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
2394 | p.iph.saddr = 0; | |
2395 | p.iph.version = 4; | |
2396 | p.iph.ihl = 5; | |
2397 | p.iph.protocol = IPPROTO_IPV6; | |
2398 | p.iph.ttl = 64; | |
d20b3109 | 2399 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 | 2400 | |
5bc3eb7e SH |
2401 | if (ops->ndo_do_ioctl) { |
2402 | mm_segment_t oldfs = get_fs(); | |
2403 | ||
2404 | set_fs(KERNEL_DS); | |
2405 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
2406 | set_fs(oldfs); | |
2407 | } else | |
2408 | err = -EOPNOTSUPP; | |
1da177e4 LT |
2409 | |
2410 | if (err == 0) { | |
2411 | err = -ENOBUFS; | |
af284937 DL |
2412 | dev = __dev_get_by_name(net, p.name); |
2413 | if (!dev) | |
1da177e4 LT |
2414 | goto err_exit; |
2415 | err = dev_open(dev); | |
2416 | } | |
2417 | } | |
0be669bb | 2418 | #endif |
1da177e4 LT |
2419 | |
2420 | err_exit: | |
2421 | rtnl_unlock(); | |
2422 | return err; | |
2423 | } | |
2424 | ||
2425 | /* | |
2426 | * Manual configuration of address on an interface | |
2427 | */ | |
479840ff JP |
2428 | static int inet6_addr_add(struct net *net, int ifindex, |
2429 | const struct in6_addr *pfx, | |
caeaba79 | 2430 | const struct in6_addr *peer_pfx, |
479840ff JP |
2431 | unsigned int plen, __u32 ifa_flags, |
2432 | __u32 prefered_lft, __u32 valid_lft) | |
1da177e4 LT |
2433 | { |
2434 | struct inet6_ifaddr *ifp; | |
2435 | struct inet6_dev *idev; | |
2436 | struct net_device *dev; | |
2437 | int scope; | |
6f704992 YH |
2438 | u32 flags; |
2439 | clock_t expires; | |
4bed72e4 | 2440 | unsigned long timeout; |
1da177e4 LT |
2441 | |
2442 | ASSERT_RTNL(); | |
1ab1457c | 2443 | |
24ef0da7 TG |
2444 | if (plen > 128) |
2445 | return -EINVAL; | |
2446 | ||
0778769d NT |
2447 | /* check the lifetime */ |
2448 | if (!valid_lft || prefered_lft > valid_lft) | |
2449 | return -EINVAL; | |
2450 | ||
53bd6749 JP |
2451 | if (ifa_flags & IFA_F_MANAGETEMPADDR && plen != 64) |
2452 | return -EINVAL; | |
2453 | ||
af284937 DL |
2454 | dev = __dev_get_by_index(net, ifindex); |
2455 | if (!dev) | |
1da177e4 | 2456 | return -ENODEV; |
1ab1457c | 2457 | |
64e724f6 BH |
2458 | idev = addrconf_add_dev(dev); |
2459 | if (IS_ERR(idev)) | |
2460 | return PTR_ERR(idev); | |
1da177e4 LT |
2461 | |
2462 | scope = ipv6_addr_scope(pfx); | |
2463 | ||
4bed72e4 YH |
2464 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
2465 | if (addrconf_finite_timeout(timeout)) { | |
2466 | expires = jiffies_to_clock_t(timeout * HZ); | |
2467 | valid_lft = timeout; | |
6f704992 | 2468 | flags = RTF_EXPIRES; |
4bed72e4 YH |
2469 | } else { |
2470 | expires = 0; | |
2471 | flags = 0; | |
2472 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 2473 | } |
0778769d | 2474 | |
4bed72e4 YH |
2475 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
2476 | if (addrconf_finite_timeout(timeout)) { | |
2477 | if (timeout == 0) | |
2478 | ifa_flags |= IFA_F_DEPRECATED; | |
2479 | prefered_lft = timeout; | |
2480 | } | |
0778769d | 2481 | |
8a226b2c JB |
2482 | ifp = ipv6_add_addr(idev, pfx, peer_pfx, plen, scope, ifa_flags, |
2483 | valid_lft, prefered_lft); | |
0778769d | 2484 | |
1da177e4 | 2485 | if (!IS_ERR(ifp)) { |
761aac73 TH |
2486 | if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) { |
2487 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, | |
2488 | expires, flags); | |
2489 | } | |
2490 | ||
95c385b4 NH |
2491 | /* |
2492 | * Note that section 3.1 of RFC 4429 indicates | |
2493 | * that the Optimistic flag should not be set for | |
2494 | * manually configured addresses | |
2495 | */ | |
cf22f9a2 | 2496 | addrconf_dad_start(ifp); |
53bd6749 JP |
2497 | if (ifa_flags & IFA_F_MANAGETEMPADDR) |
2498 | manage_tempaddrs(idev, ifp, valid_lft, prefered_lft, | |
2499 | true, jiffies); | |
1da177e4 | 2500 | in6_ifa_put(ifp); |
c15b1cca | 2501 | addrconf_verify_rtnl(); |
1da177e4 LT |
2502 | return 0; |
2503 | } | |
2504 | ||
2505 | return PTR_ERR(ifp); | |
2506 | } | |
2507 | ||
6046d5b4 HK |
2508 | static int inet6_addr_del(struct net *net, int ifindex, u32 ifa_flags, |
2509 | const struct in6_addr *pfx, unsigned int plen) | |
1da177e4 LT |
2510 | { |
2511 | struct inet6_ifaddr *ifp; | |
2512 | struct inet6_dev *idev; | |
2513 | struct net_device *dev; | |
1ab1457c | 2514 | |
24ef0da7 TG |
2515 | if (plen > 128) |
2516 | return -EINVAL; | |
2517 | ||
af284937 DL |
2518 | dev = __dev_get_by_index(net, ifindex); |
2519 | if (!dev) | |
1da177e4 LT |
2520 | return -ENODEV; |
2521 | ||
7eaa48a4 | 2522 | if ((idev = __in6_dev_get(dev)) == NULL) |
1da177e4 LT |
2523 | return -ENXIO; |
2524 | ||
2525 | read_lock_bh(&idev->lock); | |
502a2ffd | 2526 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
2527 | if (ifp->prefix_len == plen && |
2528 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
2529 | in6_ifa_hold(ifp); | |
2530 | read_unlock_bh(&idev->lock); | |
1ab1457c | 2531 | |
6046d5b4 HK |
2532 | if (!(ifp->flags & IFA_F_TEMPORARY) && |
2533 | (ifa_flags & IFA_F_MANAGETEMPADDR)) | |
2534 | manage_tempaddrs(idev, ifp, 0, 0, false, | |
2535 | jiffies); | |
1da177e4 | 2536 | ipv6_del_addr(ifp); |
6046d5b4 | 2537 | addrconf_verify_rtnl(); |
1da177e4 LT |
2538 | return 0; |
2539 | } | |
2540 | } | |
2541 | read_unlock_bh(&idev->lock); | |
2542 | return -EADDRNOTAVAIL; | |
2543 | } | |
2544 | ||
2545 | ||
af284937 | 2546 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2547 | { |
2548 | struct in6_ifreq ireq; | |
2549 | int err; | |
1ab1457c | 2550 | |
af31f412 | 2551 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 | 2552 | return -EPERM; |
1ab1457c | 2553 | |
1da177e4 LT |
2554 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2555 | return -EFAULT; | |
2556 | ||
2557 | rtnl_lock(); | |
caeaba79 | 2558 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, NULL, |
af284937 DL |
2559 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, |
2560 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 LT |
2561 | rtnl_unlock(); |
2562 | return err; | |
2563 | } | |
2564 | ||
af284937 | 2565 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2566 | { |
2567 | struct in6_ifreq ireq; | |
2568 | int err; | |
1ab1457c | 2569 | |
af31f412 | 2570 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
2571 | return -EPERM; |
2572 | ||
2573 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2574 | return -EFAULT; | |
2575 | ||
2576 | rtnl_lock(); | |
6046d5b4 | 2577 | err = inet6_addr_del(net, ireq.ifr6_ifindex, 0, &ireq.ifr6_addr, |
af284937 | 2578 | ireq.ifr6_prefixlen); |
1da177e4 LT |
2579 | rtnl_unlock(); |
2580 | return err; | |
2581 | } | |
2582 | ||
b5f348e5 IJ |
2583 | static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
2584 | int plen, int scope) | |
2585 | { | |
2586 | struct inet6_ifaddr *ifp; | |
2587 | ||
8a226b2c | 2588 | ifp = ipv6_add_addr(idev, addr, NULL, plen, |
07edd741 HFS |
2589 | scope, IFA_F_PERMANENT, |
2590 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
b5f348e5 IJ |
2591 | if (!IS_ERR(ifp)) { |
2592 | spin_lock_bh(&ifp->lock); | |
2593 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2594 | spin_unlock_bh(&ifp->lock); | |
2595 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2596 | in6_ifa_put(ifp); | |
2597 | } | |
2598 | } | |
2599 | ||
07a93626 | 2600 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2601 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2602 | { | |
1da177e4 LT |
2603 | struct in6_addr addr; |
2604 | struct net_device *dev; | |
c346dca1 | 2605 | struct net *net = dev_net(idev->dev); |
929c9cf3 | 2606 | int scope, plen; |
f0e2acfa | 2607 | u32 pflags = 0; |
1da177e4 LT |
2608 | |
2609 | ASSERT_RTNL(); | |
2610 | ||
2611 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2612 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2613 | ||
2614 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2615 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2616 | scope = IFA_LINK; | |
929c9cf3 | 2617 | plen = 64; |
1da177e4 LT |
2618 | } else { |
2619 | scope = IPV6_ADDR_COMPATv4; | |
929c9cf3 | 2620 | plen = 96; |
f0e2acfa | 2621 | pflags |= RTF_NONEXTHOP; |
1da177e4 LT |
2622 | } |
2623 | ||
2624 | if (addr.s6_addr32[3]) { | |
929c9cf3 | 2625 | add_addr(idev, &addr, plen, scope); |
f0e2acfa | 2626 | addrconf_prefix_route(&addr, plen, idev->dev, 0, pflags); |
1da177e4 LT |
2627 | return; |
2628 | } | |
2629 | ||
6fda7350 | 2630 | for_each_netdev(net, dev) { |
8e5e8f30 | 2631 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 | 2632 | if (in_dev && (dev->flags & IFF_UP)) { |
8e5e8f30 | 2633 | struct in_ifaddr *ifa; |
1da177e4 LT |
2634 | |
2635 | int flag = scope; | |
2636 | ||
2637 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
1da177e4 LT |
2638 | |
2639 | addr.s6_addr32[3] = ifa->ifa_local; | |
2640 | ||
2641 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2642 | continue; | |
2643 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2644 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2645 | continue; | |
2646 | flag |= IFA_HOST; | |
2647 | } | |
1da177e4 | 2648 | |
b5f348e5 | 2649 | add_addr(idev, &addr, plen, flag); |
f0e2acfa ND |
2650 | addrconf_prefix_route(&addr, plen, idev->dev, 0, |
2651 | pflags); | |
1da177e4 LT |
2652 | } |
2653 | } | |
1ab1457c | 2654 | } |
1da177e4 | 2655 | } |
0be669bb | 2656 | #endif |
1da177e4 LT |
2657 | |
2658 | static void init_loopback(struct net_device *dev) | |
2659 | { | |
2660 | struct inet6_dev *idev; | |
25fb6ca4 BK |
2661 | struct net_device *sp_dev; |
2662 | struct inet6_ifaddr *sp_ifa; | |
2663 | struct rt6_info *sp_rt; | |
1da177e4 LT |
2664 | |
2665 | /* ::1 */ | |
2666 | ||
2667 | ASSERT_RTNL(); | |
2668 | ||
7eaa48a4 | 2669 | if ((idev = ipv6_find_idev(dev)) == NULL) { |
91df42be | 2670 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
2671 | return; |
2672 | } | |
2673 | ||
b5f348e5 | 2674 | add_addr(idev, &in6addr_loopback, 128, IFA_HOST); |
25fb6ca4 BK |
2675 | |
2676 | /* Add routes to other interface's IPv6 addresses */ | |
2677 | for_each_netdev(dev_net(dev), sp_dev) { | |
2678 | if (!strcmp(sp_dev->name, dev->name)) | |
2679 | continue; | |
2680 | ||
2681 | idev = __in6_dev_get(sp_dev); | |
2682 | if (!idev) | |
2683 | continue; | |
2684 | ||
2685 | read_lock_bh(&idev->lock); | |
2686 | list_for_each_entry(sp_ifa, &idev->addr_list, if_list) { | |
2687 | ||
2688 | if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE)) | |
2689 | continue; | |
2690 | ||
33d99113 G |
2691 | if (sp_ifa->rt) { |
2692 | /* This dst has been added to garbage list when | |
2693 | * lo device down, release this obsolete dst and | |
2694 | * reallocate a new router for ifa. | |
2695 | */ | |
2696 | if (sp_ifa->rt->dst.obsolete > 0) { | |
2697 | ip6_rt_put(sp_ifa->rt); | |
2698 | sp_ifa->rt = NULL; | |
2699 | } else { | |
2700 | continue; | |
2701 | } | |
2702 | } | |
a881ae1f | 2703 | |
57ec0afe | 2704 | sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, false); |
25fb6ca4 BK |
2705 | |
2706 | /* Failure cases are ignored */ | |
534c8779 G |
2707 | if (!IS_ERR(sp_rt)) { |
2708 | sp_ifa->rt = sp_rt; | |
25fb6ca4 | 2709 | ip6_ins_rt(sp_rt); |
534c8779 | 2710 | } |
25fb6ca4 BK |
2711 | } |
2712 | read_unlock_bh(&idev->lock); | |
2713 | } | |
1da177e4 LT |
2714 | } |
2715 | ||
b71d1d42 | 2716 | static void addrconf_add_linklocal(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 | 2717 | { |
8e5e8f30 | 2718 | struct inet6_ifaddr *ifp; |
95c385b4 NH |
2719 | u32 addr_flags = IFA_F_PERMANENT; |
2720 | ||
2721 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2722 | if (idev->cnf.optimistic_dad && | |
702beb87 | 2723 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
95c385b4 NH |
2724 | addr_flags |= IFA_F_OPTIMISTIC; |
2725 | #endif | |
1da177e4 | 2726 | |
95c385b4 | 2727 | |
07edd741 HFS |
2728 | ifp = ipv6_add_addr(idev, addr, NULL, 64, IFA_LINK, addr_flags, |
2729 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 | 2730 | if (!IS_ERR(ifp)) { |
46d48046 | 2731 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
cf22f9a2 | 2732 | addrconf_dad_start(ifp); |
1da177e4 LT |
2733 | in6_ifa_put(ifp); |
2734 | } | |
2735 | } | |
2736 | ||
bc91b0f0 JP |
2737 | static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route) |
2738 | { | |
2739 | if (idev->addr_gen_mode == IN6_ADDR_GEN_MODE_EUI64) { | |
2740 | struct in6_addr addr; | |
2741 | ||
2742 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
2743 | /* addrconf_add_linklocal also adds a prefix_route and we | |
2744 | * only need to care about prefix routes if ipv6_generate_eui64 | |
2745 | * couldn't generate one. | |
2746 | */ | |
2747 | if (ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) == 0) | |
2748 | addrconf_add_linklocal(idev, &addr); | |
2749 | else if (prefix_route) | |
2750 | addrconf_prefix_route(&addr, 64, idev->dev, 0, 0); | |
2751 | } | |
2752 | } | |
2753 | ||
1da177e4 LT |
2754 | static void addrconf_dev_config(struct net_device *dev) |
2755 | { | |
8e5e8f30 | 2756 | struct inet6_dev *idev; |
1da177e4 LT |
2757 | |
2758 | ASSERT_RTNL(); | |
2759 | ||
74235a25 HX |
2760 | if ((dev->type != ARPHRD_ETHER) && |
2761 | (dev->type != ARPHRD_FDDI) && | |
74235a25 | 2762 | (dev->type != ARPHRD_ARCNET) && |
06a4c1c5 | 2763 | (dev->type != ARPHRD_INFINIBAND) && |
cb6bf355 | 2764 | (dev->type != ARPHRD_IEEE802154) && |
e837735e | 2765 | (dev->type != ARPHRD_IEEE1394) && |
e74bccb8 JR |
2766 | (dev->type != ARPHRD_TUNNEL6) && |
2767 | (dev->type != ARPHRD_6LOWPAN)) { | |
74235a25 HX |
2768 | /* Alas, we support only Ethernet autoconfiguration. */ |
2769 | return; | |
2770 | } | |
2771 | ||
1da177e4 | 2772 | idev = addrconf_add_dev(dev); |
64e724f6 | 2773 | if (IS_ERR(idev)) |
1da177e4 LT |
2774 | return; |
2775 | ||
bc91b0f0 | 2776 | addrconf_addr_gen(idev, false); |
1da177e4 LT |
2777 | } |
2778 | ||
07a93626 | 2779 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2780 | static void addrconf_sit_config(struct net_device *dev) |
2781 | { | |
2782 | struct inet6_dev *idev; | |
2783 | ||
2784 | ASSERT_RTNL(); | |
2785 | ||
1ab1457c YH |
2786 | /* |
2787 | * Configure the tunnel with one of our IPv4 | |
2788 | * addresses... we should configure all of | |
1da177e4 LT |
2789 | * our v4 addrs in the tunnel |
2790 | */ | |
2791 | ||
7eaa48a4 | 2792 | if ((idev = ipv6_find_idev(dev)) == NULL) { |
91df42be | 2793 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
2794 | return; |
2795 | } | |
2796 | ||
c7dc89c0 | 2797 | if (dev->priv_flags & IFF_ISATAP) { |
bc91b0f0 | 2798 | addrconf_addr_gen(idev, false); |
c7dc89c0 FT |
2799 | return; |
2800 | } | |
2801 | ||
1da177e4 LT |
2802 | sit_add_v4_addrs(idev); |
2803 | ||
62b54dd9 | 2804 | if (dev->flags&IFF_POINTOPOINT) |
1da177e4 | 2805 | addrconf_add_mroute(dev); |
1da177e4 | 2806 | } |
0be669bb | 2807 | #endif |
1da177e4 | 2808 | |
07a93626 | 2809 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
aee80b54 | 2810 | static void addrconf_gre_config(struct net_device *dev) |
2811 | { | |
2812 | struct inet6_dev *idev; | |
aee80b54 | 2813 | |
aee80b54 | 2814 | ASSERT_RTNL(); |
2815 | ||
7eaa48a4 | 2816 | if ((idev = ipv6_find_idev(dev)) == NULL) { |
91df42be | 2817 | pr_debug("%s: add_dev failed\n", __func__); |
aee80b54 | 2818 | return; |
2819 | } | |
2820 | ||
bc91b0f0 | 2821 | addrconf_addr_gen(idev, true); |
aee80b54 | 2822 | } |
2823 | #endif | |
2824 | ||
1ab1457c | 2825 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
351638e7 | 2826 | void *ptr) |
1da177e4 | 2827 | { |
351638e7 | 2828 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
748e2d93 | 2829 | struct inet6_dev *idev = __in6_dev_get(dev); |
c5e33bdd | 2830 | int run_pending = 0; |
b217d616 | 2831 | int err; |
1da177e4 | 2832 | |
e21e8467 | 2833 | switch (event) { |
45ba9dd2 | 2834 | case NETDEV_REGISTER: |
74235a25 | 2835 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 | 2836 | idev = ipv6_add_dev(dev); |
a317a2f1 WC |
2837 | if (IS_ERR(idev)) |
2838 | return notifier_from_errno(PTR_ERR(idev)); | |
45ba9dd2 YH |
2839 | } |
2840 | break; | |
bcdd553f | 2841 | |
1da177e4 | 2842 | case NETDEV_UP: |
3c21edbd | 2843 | case NETDEV_CHANGE: |
c2edacf8 JV |
2844 | if (dev->flags & IFF_SLAVE) |
2845 | break; | |
2846 | ||
3c21edbd | 2847 | if (event == NETDEV_UP) { |
f24e3d65 | 2848 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd | 2849 | /* device is not ready yet. */ |
f3213831 | 2850 | pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n", |
3c21edbd YH |
2851 | dev->name); |
2852 | break; | |
2853 | } | |
99081049 | 2854 | |
d31c7b8f EP |
2855 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
2856 | idev = ipv6_add_dev(dev); | |
2857 | ||
a317a2f1 | 2858 | if (!IS_ERR_OR_NULL(idev)) { |
99081049 | 2859 | idev->if_flags |= IF_READY; |
e3ec6cfc BT |
2860 | run_pending = 1; |
2861 | } | |
3c21edbd | 2862 | } else { |
f24e3d65 | 2863 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2864 | /* device is still not ready. */ |
2865 | break; | |
2866 | } | |
2867 | ||
2868 | if (idev) { | |
bcdd553f | 2869 | if (idev->if_flags & IF_READY) |
3c21edbd YH |
2870 | /* device is already configured. */ |
2871 | break; | |
3c21edbd YH |
2872 | idev->if_flags |= IF_READY; |
2873 | } | |
2874 | ||
f3213831 JP |
2875 | pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n", |
2876 | dev->name); | |
3c21edbd | 2877 | |
c5e33bdd | 2878 | run_pending = 1; |
3c21edbd YH |
2879 | } |
2880 | ||
e21e8467 | 2881 | switch (dev->type) { |
07a93626 | 2882 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2883 | case ARPHRD_SIT: |
2884 | addrconf_sit_config(dev); | |
2885 | break; | |
aee80b54 | 2886 | #endif |
07a93626 | 2887 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
aee80b54 | 2888 | case ARPHRD_IPGRE: |
2889 | addrconf_gre_config(dev); | |
2890 | break; | |
0be669bb | 2891 | #endif |
1da177e4 LT |
2892 | case ARPHRD_LOOPBACK: |
2893 | init_loopback(dev); | |
2894 | break; | |
2895 | ||
2896 | default: | |
2897 | addrconf_dev_config(dev); | |
2898 | break; | |
3ff50b79 | 2899 | } |
bcdd553f | 2900 | |
a317a2f1 | 2901 | if (!IS_ERR_OR_NULL(idev)) { |
c5e33bdd YH |
2902 | if (run_pending) |
2903 | addrconf_dad_run(idev); | |
2904 | ||
bcdd553f SH |
2905 | /* |
2906 | * If the MTU changed during the interface down, | |
2907 | * when the interface up, the changed MTU must be | |
2908 | * reflected in the idev as well as routers. | |
1da177e4 | 2909 | */ |
bcdd553f SH |
2910 | if (idev->cnf.mtu6 != dev->mtu && |
2911 | dev->mtu >= IPV6_MIN_MTU) { | |
1da177e4 LT |
2912 | rt6_mtu_change(dev, dev->mtu); |
2913 | idev->cnf.mtu6 = dev->mtu; | |
2914 | } | |
2915 | idev->tstamp = jiffies; | |
2916 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
bcdd553f SH |
2917 | |
2918 | /* | |
2919 | * If the changed mtu during down is lower than | |
2920 | * IPV6_MIN_MTU stop IPv6 on this interface. | |
1da177e4 LT |
2921 | */ |
2922 | if (dev->mtu < IPV6_MIN_MTU) | |
bcdd553f | 2923 | addrconf_ifdown(dev, 1); |
1da177e4 LT |
2924 | } |
2925 | break; | |
2926 | ||
2927 | case NETDEV_CHANGEMTU: | |
d31c7b8f | 2928 | if (idev && dev->mtu >= IPV6_MIN_MTU) { |
1da177e4 LT |
2929 | rt6_mtu_change(dev, dev->mtu); |
2930 | idev->cnf.mtu6 = dev->mtu; | |
2931 | break; | |
2932 | } | |
2933 | ||
d31c7b8f EP |
2934 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
2935 | idev = ipv6_add_dev(dev); | |
a317a2f1 | 2936 | if (!IS_ERR(idev)) |
d31c7b8f EP |
2937 | break; |
2938 | } | |
2939 | ||
bcdd553f | 2940 | /* |
db9c7c39 | 2941 | * if MTU under IPV6_MIN_MTU. |
bcdd553f SH |
2942 | * Stop IPv6 on this interface. |
2943 | */ | |
1da177e4 LT |
2944 | |
2945 | case NETDEV_DOWN: | |
2946 | case NETDEV_UNREGISTER: | |
2947 | /* | |
2948 | * Remove all addresses from this interface. | |
2949 | */ | |
2950 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2951 | break; | |
3c21edbd | 2952 | |
1da177e4 | 2953 | case NETDEV_CHANGENAME: |
1da177e4 | 2954 | if (idev) { |
5632c515 | 2955 | snmp6_unregister_dev(idev); |
408c4768 | 2956 | addrconf_sysctl_unregister(idev); |
a317a2f1 | 2957 | err = addrconf_sysctl_register(idev); |
b217d616 HX |
2958 | if (err) |
2959 | return notifier_from_errno(err); | |
a317a2f1 WC |
2960 | err = snmp6_register_dev(idev); |
2961 | if (err) { | |
2962 | addrconf_sysctl_unregister(idev); | |
2963 | return notifier_from_errno(err); | |
2964 | } | |
5632c515 | 2965 | } |
1da177e4 | 2966 | break; |
bcdd553f | 2967 | |
93d9b7d7 JP |
2968 | case NETDEV_PRE_TYPE_CHANGE: |
2969 | case NETDEV_POST_TYPE_CHANGE: | |
2970 | addrconf_type_change(dev, event); | |
75c78500 | 2971 | break; |
3ff50b79 | 2972 | } |
1da177e4 LT |
2973 | |
2974 | return NOTIFY_OK; | |
2975 | } | |
2976 | ||
2977 | /* | |
2978 | * addrconf module should be notified of a device going up | |
2979 | */ | |
2980 | static struct notifier_block ipv6_dev_notf = { | |
2981 | .notifier_call = addrconf_notify, | |
1da177e4 LT |
2982 | }; |
2983 | ||
93d9b7d7 | 2984 | static void addrconf_type_change(struct net_device *dev, unsigned long event) |
75c78500 MS |
2985 | { |
2986 | struct inet6_dev *idev; | |
2987 | ASSERT_RTNL(); | |
2988 | ||
2989 | idev = __in6_dev_get(dev); | |
2990 | ||
93d9b7d7 | 2991 | if (event == NETDEV_POST_TYPE_CHANGE) |
75c78500 | 2992 | ipv6_mc_remap(idev); |
93d9b7d7 | 2993 | else if (event == NETDEV_PRE_TYPE_CHANGE) |
75c78500 MS |
2994 | ipv6_mc_unmap(idev); |
2995 | } | |
2996 | ||
1da177e4 LT |
2997 | static int addrconf_ifdown(struct net_device *dev, int how) |
2998 | { | |
c346dca1 | 2999 | struct net *net = dev_net(dev); |
502a2ffd | 3000 | struct inet6_dev *idev; |
3001 | struct inet6_ifaddr *ifa; | |
73a8bd74 | 3002 | int state, i; |
1da177e4 LT |
3003 | |
3004 | ASSERT_RTNL(); | |
3005 | ||
73a8bd74 DM |
3006 | rt6_ifdown(net, dev); |
3007 | neigh_ifdown(&nd_tbl, dev); | |
1da177e4 LT |
3008 | |
3009 | idev = __in6_dev_get(dev); | |
3010 | if (idev == NULL) | |
3011 | return -ENODEV; | |
3012 | ||
bcdd553f SH |
3013 | /* |
3014 | * Step 1: remove reference to ipv6 device from parent device. | |
3015 | * Do not dev_put! | |
1da177e4 | 3016 | */ |
439e2385 | 3017 | if (how) { |
1da177e4 | 3018 | idev->dead = 1; |
8814c4b5 YH |
3019 | |
3020 | /* protected by rtnl_lock */ | |
a9b3cd7f | 3021 | RCU_INIT_POINTER(dev->ip6_ptr, NULL); |
1da177e4 LT |
3022 | |
3023 | /* Step 1.5: remove snmp6 entry */ | |
3024 | snmp6_unregister_dev(idev); | |
3025 | ||
3026 | } | |
3027 | ||
73a8bd74 DM |
3028 | /* Step 2: clear hash table */ |
3029 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { | |
3030 | struct hlist_head *h = &inet6_addr_lst[i]; | |
73a8bd74 DM |
3031 | |
3032 | spin_lock_bh(&addrconf_hash_lock); | |
3033 | restart: | |
b67bfe0d | 3034 | hlist_for_each_entry_rcu(ifa, h, addr_lst) { |
73a8bd74 DM |
3035 | if (ifa->idev == idev) { |
3036 | hlist_del_init_rcu(&ifa->addr_lst); | |
c15b1cca | 3037 | addrconf_del_dad_work(ifa); |
73a8bd74 DM |
3038 | goto restart; |
3039 | } | |
3040 | } | |
3041 | spin_unlock_bh(&addrconf_hash_lock); | |
3042 | } | |
3043 | ||
1da177e4 LT |
3044 | write_lock_bh(&idev->lock); |
3045 | ||
b7b1bfce HFS |
3046 | addrconf_del_rs_timer(idev); |
3047 | ||
bcdd553f | 3048 | /* Step 2: clear flags for stateless addrconf */ |
439e2385 | 3049 | if (!how) |
3c21edbd | 3050 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 | 3051 | |
439e2385 | 3052 | if (how && del_timer(&idev->regen_timer)) |
1da177e4 LT |
3053 | in6_dev_put(idev); |
3054 | ||
bcdd553f | 3055 | /* Step 3: clear tempaddr list */ |
372e6c8f | 3056 | while (!list_empty(&idev->tempaddr_list)) { |
3057 | ifa = list_first_entry(&idev->tempaddr_list, | |
3058 | struct inet6_ifaddr, tmp_list); | |
3059 | list_del(&ifa->tmp_list); | |
1da177e4 LT |
3060 | write_unlock_bh(&idev->lock); |
3061 | spin_lock_bh(&ifa->lock); | |
3062 | ||
3063 | if (ifa->ifpub) { | |
3064 | in6_ifa_put(ifa->ifpub); | |
3065 | ifa->ifpub = NULL; | |
3066 | } | |
3067 | spin_unlock_bh(&ifa->lock); | |
3068 | in6_ifa_put(ifa); | |
3069 | write_lock_bh(&idev->lock); | |
3070 | } | |
8f37ada5 | 3071 | |
502a2ffd | 3072 | while (!list_empty(&idev->addr_list)) { |
3073 | ifa = list_first_entry(&idev->addr_list, | |
3074 | struct inet6_ifaddr, if_list); | |
c15b1cca | 3075 | addrconf_del_dad_work(ifa); |
84e8b803 | 3076 | |
73a8bd74 | 3077 | list_del(&ifa->if_list); |
84e8b803 | 3078 | |
73a8bd74 | 3079 | write_unlock_bh(&idev->lock); |
84e8b803 | 3080 | |
73a8bd74 DM |
3081 | spin_lock_bh(&ifa->state_lock); |
3082 | state = ifa->state; | |
3083 | ifa->state = INET6_IFADDR_STATE_DEAD; | |
3084 | spin_unlock_bh(&ifa->state_lock); | |
9d82ca98 | 3085 | |
73a8bd74 DM |
3086 | if (state != INET6_IFADDR_STATE_DEAD) { |
3087 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
f88c91dd | 3088 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifa); |
27bdb2ab | 3089 | } |
73a8bd74 | 3090 | in6_ifa_put(ifa); |
8f37ada5 | 3091 | |
73a8bd74 DM |
3092 | write_lock_bh(&idev->lock); |
3093 | } | |
8f37ada5 | 3094 | |
1da177e4 LT |
3095 | write_unlock_bh(&idev->lock); |
3096 | ||
3097 | /* Step 5: Discard multicast list */ | |
439e2385 | 3098 | if (how) |
1da177e4 LT |
3099 | ipv6_mc_destroy_dev(idev); |
3100 | else | |
3101 | ipv6_mc_down(idev); | |
3102 | ||
1da177e4 | 3103 | idev->tstamp = jiffies; |
1ab1457c | 3104 | |
bcdd553f | 3105 | /* Last: Shot the device (if unregistered) */ |
439e2385 | 3106 | if (how) { |
408c4768 | 3107 | addrconf_sysctl_unregister(idev); |
1da177e4 LT |
3108 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
3109 | neigh_ifdown(&nd_tbl, dev); | |
3110 | in6_dev_put(idev); | |
3111 | } | |
3112 | return 0; | |
3113 | } | |
3114 | ||
3115 | static void addrconf_rs_timer(unsigned long data) | |
3116 | { | |
b7b1bfce | 3117 | struct inet6_dev *idev = (struct inet6_dev *)data; |
caf92bc4 | 3118 | struct net_device *dev = idev->dev; |
b7b1bfce | 3119 | struct in6_addr lladdr; |
1da177e4 | 3120 | |
b7b1bfce | 3121 | write_lock(&idev->lock); |
5b2a1953 | 3122 | if (idev->dead || !(idev->if_flags & IF_READY)) |
1da177e4 LT |
3123 | goto out; |
3124 | ||
9ba2add3 | 3125 | if (!ipv6_accept_ra(idev)) |
5b2a1953 | 3126 | goto out; |
3127 | ||
3128 | /* Announcement received after solicitation was sent */ | |
3129 | if (idev->if_flags & IF_RA_RCVD) | |
1da177e4 | 3130 | goto out; |
1da177e4 | 3131 | |
b7b1bfce | 3132 | if (idev->rs_probes++ < idev->cnf.rtr_solicits) { |
caf92bc4 CW |
3133 | write_unlock(&idev->lock); |
3134 | if (!ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) | |
3135 | ndisc_send_rs(dev, &lladdr, | |
b7b1bfce HFS |
3136 | &in6addr_linklocal_allrouters); |
3137 | else | |
caf92bc4 | 3138 | goto put; |
1da177e4 | 3139 | |
caf92bc4 | 3140 | write_lock(&idev->lock); |
b7b1bfce HFS |
3141 | /* The wait after the last probe can be shorter */ |
3142 | addrconf_mod_rs_timer(idev, (idev->rs_probes == | |
3143 | idev->cnf.rtr_solicits) ? | |
3144 | idev->cnf.rtr_solicit_delay : | |
3145 | idev->cnf.rtr_solicit_interval); | |
1da177e4 | 3146 | } else { |
1da177e4 LT |
3147 | /* |
3148 | * Note: we do not support deprecated "all on-link" | |
3149 | * assumption any longer. | |
3150 | */ | |
91df42be | 3151 | pr_debug("%s: no IPv6 routers present\n", idev->dev->name); |
1da177e4 LT |
3152 | } |
3153 | ||
3154 | out: | |
b7b1bfce | 3155 | write_unlock(&idev->lock); |
caf92bc4 | 3156 | put: |
b7b1bfce | 3157 | in6_dev_put(idev); |
1da177e4 LT |
3158 | } |
3159 | ||
3160 | /* | |
3161 | * Duplicate Address Detection | |
3162 | */ | |
3c21edbd YH |
3163 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
3164 | { | |
3165 | unsigned long rand_num; | |
3166 | struct inet6_dev *idev = ifp->idev; | |
3167 | ||
95c385b4 NH |
3168 | if (ifp->flags & IFA_F_OPTIMISTIC) |
3169 | rand_num = 0; | |
3170 | else | |
63862b5b | 3171 | rand_num = prandom_u32() % (idev->cnf.rtr_solicit_delay ? : 1); |
95c385b4 | 3172 | |
b7b1bfce | 3173 | ifp->dad_probes = idev->cnf.dad_transmits; |
c15b1cca | 3174 | addrconf_mod_dad_work(ifp, rand_num); |
3c21edbd YH |
3175 | } |
3176 | ||
c15b1cca | 3177 | static void addrconf_dad_begin(struct inet6_ifaddr *ifp) |
1da177e4 LT |
3178 | { |
3179 | struct inet6_dev *idev = ifp->idev; | |
3180 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
3181 | |
3182 | addrconf_join_solict(dev, &ifp->addr); | |
3183 | ||
63862b5b | 3184 | prandom_seed((__force u32) ifp->addr.s6_addr32[3]); |
1da177e4 LT |
3185 | |
3186 | read_lock_bh(&idev->lock); | |
622ccdf1 | 3187 | spin_lock(&ifp->lock); |
e9d3e084 | 3188 | if (ifp->state == INET6_IFADDR_STATE_DEAD) |
1da177e4 | 3189 | goto out; |
1da177e4 LT |
3190 | |
3191 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
1b34be74 | 3192 | idev->cnf.accept_dad < 1 || |
55ebaef1 NT |
3193 | !(ifp->flags&IFA_F_TENTATIVE) || |
3194 | ifp->flags & IFA_F_NODAD) { | |
cc411d0b | 3195 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 3196 | spin_unlock(&ifp->lock); |
1da177e4 LT |
3197 | read_unlock_bh(&idev->lock); |
3198 | ||
3199 | addrconf_dad_completed(ifp); | |
3200 | return; | |
3201 | } | |
3202 | ||
6732bade | 3203 | if (!(idev->if_flags & IF_READY)) { |
21809faf | 3204 | spin_unlock(&ifp->lock); |
6732bade | 3205 | read_unlock_bh(&idev->lock); |
3c21edbd | 3206 | /* |
590a9887 | 3207 | * If the device is not ready: |
3c21edbd YH |
3208 | * - keep it tentative if it is a permanent address. |
3209 | * - otherwise, kill it. | |
3210 | */ | |
3211 | in6_ifa_hold(ifp); | |
cc411d0b | 3212 | addrconf_dad_stop(ifp, 0); |
6732bade | 3213 | return; |
3c21edbd | 3214 | } |
95c385b4 NH |
3215 | |
3216 | /* | |
3217 | * Optimistic nodes can start receiving | |
3218 | * Frames right away | |
3219 | */ | |
e21e8467 | 3220 | if (ifp->flags & IFA_F_OPTIMISTIC) |
95c385b4 NH |
3221 | ip6_ins_rt(ifp->rt); |
3222 | ||
6732bade | 3223 | addrconf_dad_kick(ifp); |
1da177e4 | 3224 | out: |
622ccdf1 | 3225 | spin_unlock(&ifp->lock); |
1da177e4 LT |
3226 | read_unlock_bh(&idev->lock); |
3227 | } | |
3228 | ||
c15b1cca | 3229 | static void addrconf_dad_start(struct inet6_ifaddr *ifp) |
1da177e4 | 3230 | { |
c15b1cca HFS |
3231 | bool begin_dad = false; |
3232 | ||
3233 | spin_lock_bh(&ifp->state_lock); | |
3234 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { | |
3235 | ifp->state = INET6_IFADDR_STATE_PREDAD; | |
3236 | begin_dad = true; | |
3237 | } | |
3238 | spin_unlock_bh(&ifp->state_lock); | |
3239 | ||
3240 | if (begin_dad) | |
3241 | addrconf_mod_dad_work(ifp, 0); | |
3242 | } | |
3243 | ||
3244 | static void addrconf_dad_work(struct work_struct *w) | |
3245 | { | |
3246 | struct inet6_ifaddr *ifp = container_of(to_delayed_work(w), | |
3247 | struct inet6_ifaddr, | |
3248 | dad_work); | |
1da177e4 | 3249 | struct inet6_dev *idev = ifp->idev; |
1da177e4 LT |
3250 | struct in6_addr mcaddr; |
3251 | ||
c15b1cca HFS |
3252 | enum { |
3253 | DAD_PROCESS, | |
3254 | DAD_BEGIN, | |
3255 | DAD_ABORT, | |
3256 | } action = DAD_PROCESS; | |
3257 | ||
3258 | rtnl_lock(); | |
3259 | ||
3260 | spin_lock_bh(&ifp->state_lock); | |
3261 | if (ifp->state == INET6_IFADDR_STATE_PREDAD) { | |
3262 | action = DAD_BEGIN; | |
3263 | ifp->state = INET6_IFADDR_STATE_DAD; | |
3264 | } else if (ifp->state == INET6_IFADDR_STATE_ERRDAD) { | |
3265 | action = DAD_ABORT; | |
3266 | ifp->state = INET6_IFADDR_STATE_POSTDAD; | |
3267 | } | |
3268 | spin_unlock_bh(&ifp->state_lock); | |
3269 | ||
3270 | if (action == DAD_BEGIN) { | |
3271 | addrconf_dad_begin(ifp); | |
3272 | goto out; | |
3273 | } else if (action == DAD_ABORT) { | |
3274 | addrconf_dad_stop(ifp, 1); | |
3275 | goto out; | |
3276 | } | |
3277 | ||
b7b1bfce | 3278 | if (!ifp->dad_probes && addrconf_dad_end(ifp)) |
f2344a13 HX |
3279 | goto out; |
3280 | ||
c15b1cca | 3281 | write_lock_bh(&idev->lock); |
122e4519 | 3282 | if (idev->dead || !(idev->if_flags & IF_READY)) { |
c15b1cca | 3283 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
3284 | goto out; |
3285 | } | |
21809faf | 3286 | |
3287 | spin_lock(&ifp->lock); | |
622ccdf1 HX |
3288 | if (ifp->state == INET6_IFADDR_STATE_DEAD) { |
3289 | spin_unlock(&ifp->lock); | |
c15b1cca | 3290 | write_unlock_bh(&idev->lock); |
622ccdf1 HX |
3291 | goto out; |
3292 | } | |
3293 | ||
b7b1bfce | 3294 | if (ifp->dad_probes == 0) { |
1da177e4 LT |
3295 | /* |
3296 | * DAD was successful | |
3297 | */ | |
3298 | ||
cc411d0b | 3299 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 3300 | spin_unlock(&ifp->lock); |
c15b1cca | 3301 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
3302 | |
3303 | addrconf_dad_completed(ifp); | |
3304 | ||
3305 | goto out; | |
3306 | } | |
3307 | ||
b7b1bfce | 3308 | ifp->dad_probes--; |
c15b1cca HFS |
3309 | addrconf_mod_dad_work(ifp, |
3310 | NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME)); | |
21809faf | 3311 | spin_unlock(&ifp->lock); |
c15b1cca | 3312 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
3313 | |
3314 | /* send a neighbour solicitation for our addr */ | |
1da177e4 | 3315 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
d7aabf22 | 3316 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any); |
1da177e4 LT |
3317 | out: |
3318 | in6_ifa_put(ifp); | |
c15b1cca | 3319 | rtnl_unlock(); |
1da177e4 LT |
3320 | } |
3321 | ||
11ffff75 HFS |
3322 | /* ifp->idev must be at least read locked */ |
3323 | static bool ipv6_lonely_lladdr(struct inet6_ifaddr *ifp) | |
3324 | { | |
3325 | struct inet6_ifaddr *ifpiter; | |
3326 | struct inet6_dev *idev = ifp->idev; | |
3327 | ||
602582ca HFS |
3328 | list_for_each_entry_reverse(ifpiter, &idev->addr_list, if_list) { |
3329 | if (ifpiter->scope > IFA_LINK) | |
3330 | break; | |
11ffff75 HFS |
3331 | if (ifp != ifpiter && ifpiter->scope == IFA_LINK && |
3332 | (ifpiter->flags & (IFA_F_PERMANENT|IFA_F_TENTATIVE| | |
3333 | IFA_F_OPTIMISTIC|IFA_F_DADFAILED)) == | |
3334 | IFA_F_PERMANENT) | |
3335 | return false; | |
3336 | } | |
3337 | return true; | |
3338 | } | |
3339 | ||
1da177e4 LT |
3340 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) |
3341 | { | |
e21e8467 | 3342 | struct net_device *dev = ifp->idev->dev; |
b7b1bfce | 3343 | struct in6_addr lladdr; |
b173ee48 | 3344 | bool send_rs, send_mld; |
b7b1bfce | 3345 | |
c15b1cca | 3346 | addrconf_del_dad_work(ifp); |
1da177e4 LT |
3347 | |
3348 | /* | |
3349 | * Configure the address for reception. Now it is valid. | |
3350 | */ | |
3351 | ||
3352 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
3353 | ||
026359bc TA |
3354 | /* If added prefix is link local and we are prepared to process |
3355 | router advertisements, start sending router solicitations. | |
1da177e4 LT |
3356 | */ |
3357 | ||
1ec047eb | 3358 | read_lock_bh(&ifp->idev->lock); |
11ffff75 | 3359 | send_mld = ifp->scope == IFA_LINK && ipv6_lonely_lladdr(ifp); |
b173ee48 HFS |
3360 | send_rs = send_mld && |
3361 | ipv6_accept_ra(ifp->idev) && | |
1ec047eb | 3362 | ifp->idev->cnf.rtr_solicits > 0 && |
b173ee48 | 3363 | (dev->flags&IFF_LOOPBACK) == 0; |
1ec047eb HFS |
3364 | read_unlock_bh(&ifp->idev->lock); |
3365 | ||
b173ee48 HFS |
3366 | /* While dad is in progress mld report's source address is in6_addrany. |
3367 | * Resend with proper ll now. | |
3368 | */ | |
3369 | if (send_mld) | |
3370 | ipv6_mc_dad_complete(ifp->idev); | |
3371 | ||
1ec047eb | 3372 | if (send_rs) { |
1da177e4 LT |
3373 | /* |
3374 | * If a host as already performed a random delay | |
3375 | * [...] as part of DAD [...] there is no need | |
3376 | * to delay again before sending the first RS | |
3377 | */ | |
1ec047eb | 3378 | if (ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) |
b7b1bfce | 3379 | return; |
1ec047eb | 3380 | ndisc_send_rs(dev, &lladdr, &in6addr_linklocal_allrouters); |
1da177e4 | 3381 | |
b7b1bfce HFS |
3382 | write_lock_bh(&ifp->idev->lock); |
3383 | spin_lock(&ifp->lock); | |
3384 | ifp->idev->rs_probes = 1; | |
1da177e4 | 3385 | ifp->idev->if_flags |= IF_RS_SENT; |
b7b1bfce HFS |
3386 | addrconf_mod_rs_timer(ifp->idev, |
3387 | ifp->idev->cnf.rtr_solicit_interval); | |
3388 | spin_unlock(&ifp->lock); | |
3389 | write_unlock_bh(&ifp->idev->lock); | |
1da177e4 LT |
3390 | } |
3391 | } | |
3392 | ||
e21e8467 SH |
3393 | static void addrconf_dad_run(struct inet6_dev *idev) |
3394 | { | |
c5e33bdd YH |
3395 | struct inet6_ifaddr *ifp; |
3396 | ||
3397 | read_lock_bh(&idev->lock); | |
502a2ffd | 3398 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
21809faf | 3399 | spin_lock(&ifp->lock); |
f2344a13 HX |
3400 | if (ifp->flags & IFA_F_TENTATIVE && |
3401 | ifp->state == INET6_IFADDR_STATE_DAD) | |
3402 | addrconf_dad_kick(ifp); | |
21809faf | 3403 | spin_unlock(&ifp->lock); |
c5e33bdd YH |
3404 | } |
3405 | read_unlock_bh(&idev->lock); | |
3406 | } | |
3407 | ||
1da177e4 LT |
3408 | #ifdef CONFIG_PROC_FS |
3409 | struct if6_iter_state { | |
3c40090a | 3410 | struct seq_net_private p; |
1da177e4 | 3411 | int bucket; |
1d578303 | 3412 | int offset; |
1da177e4 LT |
3413 | }; |
3414 | ||
1d578303 | 3415 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos) |
1da177e4 LT |
3416 | { |
3417 | struct inet6_ifaddr *ifa = NULL; | |
3418 | struct if6_iter_state *state = seq->private; | |
1218854a | 3419 | struct net *net = seq_file_net(seq); |
1d578303 | 3420 | int p = 0; |
1da177e4 | 3421 | |
1d578303 MM |
3422 | /* initial bucket if pos is 0 */ |
3423 | if (pos == 0) { | |
3424 | state->bucket = 0; | |
3425 | state->offset = 0; | |
3426 | } | |
3427 | ||
3428 | for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
b67bfe0d | 3429 | hlist_for_each_entry_rcu_bh(ifa, &inet6_addr_lst[state->bucket], |
1d578303 | 3430 | addr_lst) { |
9f0d3c27 ED |
3431 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3432 | continue; | |
1d578303 MM |
3433 | /* sync with offset */ |
3434 | if (p < state->offset) { | |
3435 | p++; | |
3436 | continue; | |
3437 | } | |
3438 | state->offset++; | |
9f0d3c27 | 3439 | return ifa; |
1d578303 MM |
3440 | } |
3441 | ||
3442 | /* prepare for next bucket */ | |
3443 | state->offset = 0; | |
3444 | p = 0; | |
1da177e4 | 3445 | } |
c2e21293 | 3446 | return NULL; |
1da177e4 LT |
3447 | } |
3448 | ||
c2e21293 | 3449 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, |
3450 | struct inet6_ifaddr *ifa) | |
1da177e4 LT |
3451 | { |
3452 | struct if6_iter_state *state = seq->private; | |
1218854a | 3453 | struct net *net = seq_file_net(seq); |
1da177e4 | 3454 | |
b67bfe0d | 3455 | hlist_for_each_entry_continue_rcu_bh(ifa, addr_lst) { |
9f0d3c27 ED |
3456 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3457 | continue; | |
1d578303 | 3458 | state->offset++; |
9f0d3c27 | 3459 | return ifa; |
1d578303 | 3460 | } |
3c40090a | 3461 | |
c2e21293 | 3462 | while (++state->bucket < IN6_ADDR_HSIZE) { |
1d578303 | 3463 | state->offset = 0; |
b67bfe0d | 3464 | hlist_for_each_entry_rcu_bh(ifa, |
c2e21293 | 3465 | &inet6_addr_lst[state->bucket], addr_lst) { |
9f0d3c27 ED |
3466 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3467 | continue; | |
1d578303 | 3468 | state->offset++; |
9f0d3c27 | 3469 | return ifa; |
c2e21293 | 3470 | } |
1da177e4 | 3471 | } |
3c40090a | 3472 | |
c2e21293 | 3473 | return NULL; |
1da177e4 LT |
3474 | } |
3475 | ||
1da177e4 | 3476 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) |
4f70ecca | 3477 | __acquires(rcu_bh) |
1da177e4 | 3478 | { |
5c578aed | 3479 | rcu_read_lock_bh(); |
1d578303 | 3480 | return if6_get_first(seq, *pos); |
1da177e4 LT |
3481 | } |
3482 | ||
3483 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3484 | { | |
3485 | struct inet6_ifaddr *ifa; | |
3486 | ||
3487 | ifa = if6_get_next(seq, v); | |
3488 | ++*pos; | |
3489 | return ifa; | |
3490 | } | |
3491 | ||
3492 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
4f70ecca | 3493 | __releases(rcu_bh) |
1da177e4 | 3494 | { |
5c578aed | 3495 | rcu_read_unlock_bh(); |
1da177e4 LT |
3496 | } |
3497 | ||
3498 | static int if6_seq_show(struct seq_file *seq, void *v) | |
3499 | { | |
3500 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
971a351c | 3501 | seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", |
b071195d | 3502 | &ifp->addr, |
1da177e4 LT |
3503 | ifp->idev->dev->ifindex, |
3504 | ifp->prefix_len, | |
3505 | ifp->scope, | |
971a351c | 3506 | (u8) ifp->flags, |
1da177e4 LT |
3507 | ifp->idev->dev->name); |
3508 | return 0; | |
3509 | } | |
3510 | ||
56b3d975 | 3511 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
3512 | .start = if6_seq_start, |
3513 | .next = if6_seq_next, | |
3514 | .show = if6_seq_show, | |
3515 | .stop = if6_seq_stop, | |
3516 | }; | |
3517 | ||
3518 | static int if6_seq_open(struct inode *inode, struct file *file) | |
3519 | { | |
3c40090a DL |
3520 | return seq_open_net(inode, file, &if6_seq_ops, |
3521 | sizeof(struct if6_iter_state)); | |
1da177e4 LT |
3522 | } |
3523 | ||
9a32144e | 3524 | static const struct file_operations if6_fops = { |
1da177e4 LT |
3525 | .owner = THIS_MODULE, |
3526 | .open = if6_seq_open, | |
3527 | .read = seq_read, | |
3528 | .llseek = seq_lseek, | |
3c40090a | 3529 | .release = seq_release_net, |
1da177e4 LT |
3530 | }; |
3531 | ||
2c8c1e72 | 3532 | static int __net_init if6_proc_net_init(struct net *net) |
1da177e4 | 3533 | { |
d4beaa66 | 3534 | if (!proc_create("if_inet6", S_IRUGO, net->proc_net, &if6_fops)) |
1da177e4 LT |
3535 | return -ENOMEM; |
3536 | return 0; | |
3537 | } | |
3538 | ||
2c8c1e72 | 3539 | static void __net_exit if6_proc_net_exit(struct net *net) |
3c40090a | 3540 | { |
ece31ffd | 3541 | remove_proc_entry("if_inet6", net->proc_net); |
3c40090a DL |
3542 | } |
3543 | ||
3544 | static struct pernet_operations if6_proc_net_ops = { | |
3545 | .init = if6_proc_net_init, | |
3546 | .exit = if6_proc_net_exit, | |
3547 | }; | |
3548 | ||
3549 | int __init if6_proc_init(void) | |
3550 | { | |
3551 | return register_pernet_subsys(&if6_proc_net_ops); | |
3552 | } | |
3553 | ||
1da177e4 LT |
3554 | void if6_proc_exit(void) |
3555 | { | |
3c40090a | 3556 | unregister_pernet_subsys(&if6_proc_net_ops); |
1da177e4 LT |
3557 | } |
3558 | #endif /* CONFIG_PROC_FS */ | |
3559 | ||
07a93626 | 3560 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
3b9f9a1c | 3561 | /* Check if address is a home address configured on any interface. */ |
b71d1d42 | 3562 | int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr) |
3b9f9a1c NT |
3563 | { |
3564 | int ret = 0; | |
c2e21293 | 3565 | struct inet6_ifaddr *ifp = NULL; |
ddbe5032 | 3566 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 3567 | |
5c578aed | 3568 | rcu_read_lock_bh(); |
b67bfe0d | 3569 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 3570 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
389f6612 | 3571 | continue; |
caad295f | 3572 | if (ipv6_addr_equal(&ifp->addr, addr) && |
3b9f9a1c NT |
3573 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
3574 | ret = 1; | |
3575 | break; | |
3576 | } | |
3577 | } | |
5c578aed | 3578 | rcu_read_unlock_bh(); |
3b9f9a1c NT |
3579 | return ret; |
3580 | } | |
3581 | #endif | |
3582 | ||
1da177e4 LT |
3583 | /* |
3584 | * Periodic address status verification | |
3585 | */ | |
3586 | ||
c15b1cca | 3587 | static void addrconf_verify_rtnl(void) |
1da177e4 | 3588 | { |
b2db7564 | 3589 | unsigned long now, next, next_sec, next_sched; |
1da177e4 | 3590 | struct inet6_ifaddr *ifp; |
1da177e4 LT |
3591 | int i; |
3592 | ||
c15b1cca HFS |
3593 | ASSERT_RTNL(); |
3594 | ||
5c578aed | 3595 | rcu_read_lock_bh(); |
1da177e4 | 3596 | now = jiffies; |
b2db7564 | 3597 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); |
1da177e4 | 3598 | |
c15b1cca | 3599 | cancel_delayed_work(&addr_chk_work); |
1da177e4 | 3600 | |
bcdd553f | 3601 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
1da177e4 | 3602 | restart: |
c15b1cca | 3603 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[i], addr_lst) { |
1da177e4 | 3604 | unsigned long age; |
1da177e4 | 3605 | |
fad8da3e YA |
3606 | /* When setting preferred_lft to a value not zero or |
3607 | * infinity, while valid_lft is infinity | |
3608 | * IFA_F_PERMANENT has a non-infinity life time. | |
3609 | */ | |
3610 | if ((ifp->flags & IFA_F_PERMANENT) && | |
3611 | (ifp->prefered_lft == INFINITY_LIFE_TIME)) | |
1da177e4 LT |
3612 | continue; |
3613 | ||
3614 | spin_lock(&ifp->lock); | |
b2db7564 YH |
3615 | /* We try to batch several events at once. */ |
3616 | age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; | |
1da177e4 | 3617 | |
8f27ebb9 YH |
3618 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
3619 | age >= ifp->valid_lft) { | |
1da177e4 LT |
3620 | spin_unlock(&ifp->lock); |
3621 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3622 | ipv6_del_addr(ifp); |
3623 | goto restart; | |
8f27ebb9 YH |
3624 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
3625 | spin_unlock(&ifp->lock); | |
3626 | continue; | |
1da177e4 | 3627 | } else if (age >= ifp->prefered_lft) { |
a1ed0526 | 3628 | /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ |
1da177e4 LT |
3629 | int deprecate = 0; |
3630 | ||
3631 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
3632 | deprecate = 1; | |
3633 | ifp->flags |= IFA_F_DEPRECATED; | |
3634 | } | |
3635 | ||
fad8da3e YA |
3636 | if ((ifp->valid_lft != INFINITY_LIFE_TIME) && |
3637 | (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))) | |
1da177e4 LT |
3638 | next = ifp->tstamp + ifp->valid_lft * HZ; |
3639 | ||
3640 | spin_unlock(&ifp->lock); | |
3641 | ||
3642 | if (deprecate) { | |
3643 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3644 | |
3645 | ipv6_ifa_notify(0, ifp); | |
3646 | in6_ifa_put(ifp); | |
3647 | goto restart; | |
3648 | } | |
1da177e4 LT |
3649 | } else if ((ifp->flags&IFA_F_TEMPORARY) && |
3650 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
88949cf4 | 3651 | unsigned long regen_advance = ifp->idev->cnf.regen_max_retry * |
3652 | ifp->idev->cnf.dad_transmits * | |
1f9248e5 | 3653 | NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME) / HZ; |
88949cf4 | 3654 | |
1da177e4 LT |
3655 | if (age >= ifp->prefered_lft - regen_advance) { |
3656 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
3657 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3658 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3659 | if (!ifp->regen_count && ifpub) { | |
3660 | ifp->regen_count++; | |
3661 | in6_ifa_hold(ifp); | |
3662 | in6_ifa_hold(ifpub); | |
3663 | spin_unlock(&ifp->lock); | |
5c578aed | 3664 | |
291d809b HY |
3665 | spin_lock(&ifpub->lock); |
3666 | ifpub->regen_count = 0; | |
3667 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
3668 | ipv6_create_tempaddr(ifpub, ifp); |
3669 | in6_ifa_put(ifpub); | |
3670 | in6_ifa_put(ifp); | |
3671 | goto restart; | |
3672 | } | |
3673 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
3674 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
3675 | spin_unlock(&ifp->lock); | |
1da177e4 LT |
3676 | } else { |
3677 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
3678 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3679 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3680 | spin_unlock(&ifp->lock); | |
3681 | } | |
3682 | } | |
1da177e4 LT |
3683 | } |
3684 | ||
b2db7564 YH |
3685 | next_sec = round_jiffies_up(next); |
3686 | next_sched = next; | |
3687 | ||
3688 | /* If rounded timeout is accurate enough, accept it. */ | |
3689 | if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) | |
3690 | next_sched = next_sec; | |
3691 | ||
3692 | /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ | |
3693 | if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX)) | |
3694 | next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX; | |
3695 | ||
ba3542e1 | 3696 | ADBG(KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n", |
3697 | now, next, next_sec, next_sched); | |
c15b1cca | 3698 | mod_delayed_work(addrconf_wq, &addr_chk_work, next_sched - now); |
5c578aed | 3699 | rcu_read_unlock_bh(); |
1da177e4 LT |
3700 | } |
3701 | ||
c15b1cca HFS |
3702 | static void addrconf_verify_work(struct work_struct *w) |
3703 | { | |
3704 | rtnl_lock(); | |
3705 | addrconf_verify_rtnl(); | |
3706 | rtnl_unlock(); | |
3707 | } | |
3708 | ||
3709 | static void addrconf_verify(void) | |
3710 | { | |
3711 | mod_delayed_work(addrconf_wq, &addr_chk_work, 0); | |
3712 | } | |
3713 | ||
caeaba79 ND |
3714 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local, |
3715 | struct in6_addr **peer_pfx) | |
461d8837 TG |
3716 | { |
3717 | struct in6_addr *pfx = NULL; | |
3718 | ||
caeaba79 ND |
3719 | *peer_pfx = NULL; |
3720 | ||
461d8837 TG |
3721 | if (addr) |
3722 | pfx = nla_data(addr); | |
3723 | ||
3724 | if (local) { | |
3725 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
caeaba79 ND |
3726 | *peer_pfx = pfx; |
3727 | pfx = nla_data(local); | |
461d8837 TG |
3728 | } |
3729 | ||
3730 | return pfx; | |
3731 | } | |
3732 | ||
ef7c79ed | 3733 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
3734 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
3735 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
3736 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
479840ff | 3737 | [IFA_FLAGS] = { .len = sizeof(u32) }, |
461d8837 TG |
3738 | }; |
3739 | ||
1da177e4 | 3740 | static int |
661d2967 | 3741 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 3742 | { |
3b1e0a65 | 3743 | struct net *net = sock_net(skb->sk); |
b933f716 TG |
3744 | struct ifaddrmsg *ifm; |
3745 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 3746 | struct in6_addr *pfx, *peer_pfx; |
6046d5b4 | 3747 | u32 ifa_flags; |
b933f716 | 3748 | int err; |
1da177e4 | 3749 | |
b933f716 TG |
3750 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3751 | if (err < 0) | |
3752 | return err; | |
3753 | ||
3754 | ifm = nlmsg_data(nlh); | |
caeaba79 | 3755 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
1da177e4 LT |
3756 | if (pfx == NULL) |
3757 | return -EINVAL; | |
3758 | ||
6046d5b4 HK |
3759 | ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags; |
3760 | ||
3761 | /* We ignore other flags so far. */ | |
3762 | ifa_flags &= IFA_F_MANAGETEMPADDR; | |
3763 | ||
3764 | return inet6_addr_del(net, ifm->ifa_index, ifa_flags, pfx, | |
3765 | ifm->ifa_prefixlen); | |
1da177e4 LT |
3766 | } |
3767 | ||
479840ff | 3768 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u32 ifa_flags, |
55ebaef1 | 3769 | u32 prefered_lft, u32 valid_lft) |
081bba5b | 3770 | { |
6f704992 YH |
3771 | u32 flags; |
3772 | clock_t expires; | |
4bed72e4 | 3773 | unsigned long timeout; |
53bd6749 | 3774 | bool was_managetempaddr; |
5b84efec | 3775 | bool had_prefixroute; |
46d48046 | 3776 | |
c15b1cca HFS |
3777 | ASSERT_RTNL(); |
3778 | ||
081bba5b NT |
3779 | if (!valid_lft || (prefered_lft > valid_lft)) |
3780 | return -EINVAL; | |
3781 | ||
53bd6749 JP |
3782 | if (ifa_flags & IFA_F_MANAGETEMPADDR && |
3783 | (ifp->flags & IFA_F_TEMPORARY || ifp->prefix_len != 64)) | |
3784 | return -EINVAL; | |
3785 | ||
4bed72e4 YH |
3786 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
3787 | if (addrconf_finite_timeout(timeout)) { | |
3788 | expires = jiffies_to_clock_t(timeout * HZ); | |
3789 | valid_lft = timeout; | |
6f704992 | 3790 | flags = RTF_EXPIRES; |
4bed72e4 YH |
3791 | } else { |
3792 | expires = 0; | |
3793 | flags = 0; | |
3794 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 3795 | } |
081bba5b | 3796 | |
4bed72e4 YH |
3797 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
3798 | if (addrconf_finite_timeout(timeout)) { | |
3799 | if (timeout == 0) | |
3800 | ifa_flags |= IFA_F_DEPRECATED; | |
3801 | prefered_lft = timeout; | |
3802 | } | |
081bba5b NT |
3803 | |
3804 | spin_lock_bh(&ifp->lock); | |
53bd6749 | 3805 | was_managetempaddr = ifp->flags & IFA_F_MANAGETEMPADDR; |
5b84efec TH |
3806 | had_prefixroute = ifp->flags & IFA_F_PERMANENT && |
3807 | !(ifp->flags & IFA_F_NOPREFIXROUTE); | |
53bd6749 | 3808 | ifp->flags &= ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | |
761aac73 TH |
3809 | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR | |
3810 | IFA_F_NOPREFIXROUTE); | |
53bd6749 | 3811 | ifp->flags |= ifa_flags; |
081bba5b NT |
3812 | ifp->tstamp = jiffies; |
3813 | ifp->valid_lft = valid_lft; | |
3814 | ifp->prefered_lft = prefered_lft; | |
3815 | ||
3816 | spin_unlock_bh(&ifp->lock); | |
3817 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
3818 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 3819 | |
761aac73 TH |
3820 | if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) { |
3821 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, | |
3822 | expires, flags); | |
5b84efec TH |
3823 | } else if (had_prefixroute) { |
3824 | enum cleanup_prefix_rt_t action; | |
3825 | unsigned long rt_expires; | |
3826 | ||
3827 | write_lock_bh(&ifp->idev->lock); | |
3828 | action = check_cleanup_prefix_route(ifp, &rt_expires); | |
3829 | write_unlock_bh(&ifp->idev->lock); | |
3830 | ||
3831 | if (action != CLEANUP_PREFIX_RT_NOP) { | |
3832 | cleanup_prefix_route(ifp, rt_expires, | |
3833 | action == CLEANUP_PREFIX_RT_DEL); | |
3834 | } | |
761aac73 | 3835 | } |
53bd6749 JP |
3836 | |
3837 | if (was_managetempaddr || ifp->flags & IFA_F_MANAGETEMPADDR) { | |
3838 | if (was_managetempaddr && !(ifp->flags & IFA_F_MANAGETEMPADDR)) | |
3839 | valid_lft = prefered_lft = 0; | |
3840 | manage_tempaddrs(ifp->idev, ifp, valid_lft, prefered_lft, | |
3841 | !was_managetempaddr, jiffies); | |
3842 | } | |
3843 | ||
c15b1cca | 3844 | addrconf_verify_rtnl(); |
081bba5b NT |
3845 | |
3846 | return 0; | |
3847 | } | |
3848 | ||
1da177e4 | 3849 | static int |
661d2967 | 3850 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 3851 | { |
3b1e0a65 | 3852 | struct net *net = sock_net(skb->sk); |
461d8837 TG |
3853 | struct ifaddrmsg *ifm; |
3854 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 3855 | struct in6_addr *pfx, *peer_pfx; |
7198f8ce TG |
3856 | struct inet6_ifaddr *ifa; |
3857 | struct net_device *dev; | |
55ebaef1 | 3858 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
479840ff | 3859 | u32 ifa_flags; |
461d8837 | 3860 | int err; |
1da177e4 | 3861 | |
461d8837 TG |
3862 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3863 | if (err < 0) | |
3864 | return err; | |
3865 | ||
3866 | ifm = nlmsg_data(nlh); | |
caeaba79 | 3867 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
1da177e4 LT |
3868 | if (pfx == NULL) |
3869 | return -EINVAL; | |
3870 | ||
461d8837 | 3871 | if (tb[IFA_CACHEINFO]) { |
0778769d | 3872 | struct ifa_cacheinfo *ci; |
461d8837 TG |
3873 | |
3874 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 3875 | valid_lft = ci->ifa_valid; |
461d8837 TG |
3876 | preferred_lft = ci->ifa_prefered; |
3877 | } else { | |
3878 | preferred_lft = INFINITY_LIFE_TIME; | |
3879 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
3880 | } |
3881 | ||
af284937 | 3882 | dev = __dev_get_by_index(net, ifm->ifa_index); |
7198f8ce TG |
3883 | if (dev == NULL) |
3884 | return -ENODEV; | |
3885 | ||
479840ff JP |
3886 | ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags; |
3887 | ||
55ebaef1 | 3888 | /* We ignore other flags so far. */ |
761aac73 TH |
3889 | ifa_flags &= IFA_F_NODAD | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR | |
3890 | IFA_F_NOPREFIXROUTE; | |
55ebaef1 | 3891 | |
1cab3da6 | 3892 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
7198f8ce TG |
3893 | if (ifa == NULL) { |
3894 | /* | |
3895 | * It would be best to check for !NLM_F_CREATE here but | |
db9c7c39 | 3896 | * userspace already relies on not having to provide this. |
7198f8ce | 3897 | */ |
caeaba79 | 3898 | return inet6_addr_add(net, ifm->ifa_index, pfx, peer_pfx, |
af284937 DL |
3899 | ifm->ifa_prefixlen, ifa_flags, |
3900 | preferred_lft, valid_lft); | |
081bba5b NT |
3901 | } |
3902 | ||
7198f8ce TG |
3903 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
3904 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
3905 | err = -EEXIST; | |
3906 | else | |
55ebaef1 | 3907 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
3908 | |
3909 | in6_ifa_put(ifa); | |
3910 | ||
3911 | return err; | |
1da177e4 LT |
3912 | } |
3913 | ||
479840ff | 3914 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u32 flags, |
101bb229 TG |
3915 | u8 scope, int ifindex) |
3916 | { | |
3917 | struct ifaddrmsg *ifm; | |
3918 | ||
3919 | ifm = nlmsg_data(nlh); | |
3920 | ifm->ifa_family = AF_INET6; | |
3921 | ifm->ifa_prefixlen = prefixlen; | |
3922 | ifm->ifa_flags = flags; | |
3923 | ifm->ifa_scope = scope; | |
3924 | ifm->ifa_index = ifindex; | |
3925 | } | |
3926 | ||
85486af0 TG |
3927 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
3928 | unsigned long tstamp, u32 preferred, u32 valid) | |
3929 | { | |
3930 | struct ifa_cacheinfo ci; | |
3931 | ||
18a31e1e TG |
3932 | ci.cstamp = cstamp_delta(cstamp); |
3933 | ci.tstamp = cstamp_delta(tstamp); | |
85486af0 TG |
3934 | ci.ifa_prefered = preferred; |
3935 | ci.ifa_valid = valid; | |
3936 | ||
3937 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3938 | } | |
3939 | ||
101bb229 TG |
3940 | static inline int rt_scope(int ifa_scope) |
3941 | { | |
3942 | if (ifa_scope & IFA_HOST) | |
3943 | return RT_SCOPE_HOST; | |
3944 | else if (ifa_scope & IFA_LINK) | |
3945 | return RT_SCOPE_LINK; | |
3946 | else if (ifa_scope & IFA_SITE) | |
3947 | return RT_SCOPE_SITE; | |
3948 | else | |
3949 | return RT_SCOPE_UNIVERSE; | |
3950 | } | |
3951 | ||
0ab6803b TG |
3952 | static inline int inet6_ifaddr_msgsize(void) |
3953 | { | |
339bf98f | 3954 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
caeaba79 | 3955 | + nla_total_size(16) /* IFA_LOCAL */ |
339bf98f | 3956 | + nla_total_size(16) /* IFA_ADDRESS */ |
479840ff JP |
3957 | + nla_total_size(sizeof(struct ifa_cacheinfo)) |
3958 | + nla_total_size(4) /* IFA_FLAGS */; | |
0ab6803b | 3959 | } |
c5396a31 | 3960 | |
1da177e4 | 3961 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
15e47304 | 3962 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3963 | { |
1da177e4 | 3964 | struct nlmsghdr *nlh; |
85486af0 | 3965 | u32 preferred, valid; |
1da177e4 | 3966 | |
15e47304 | 3967 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
0ab6803b | 3968 | if (nlh == NULL) |
26932566 | 3969 | return -EMSGSIZE; |
0ab6803b | 3970 | |
101bb229 TG |
3971 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
3972 | ifa->idev->dev->ifindex); | |
3973 | ||
fad8da3e YA |
3974 | if (!((ifa->flags&IFA_F_PERMANENT) && |
3975 | (ifa->prefered_lft == INFINITY_LIFE_TIME))) { | |
85486af0 TG |
3976 | preferred = ifa->prefered_lft; |
3977 | valid = ifa->valid_lft; | |
3978 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 3979 | long tval = (jiffies - ifa->tstamp)/HZ; |
a1faa698 JR |
3980 | if (preferred > tval) |
3981 | preferred -= tval; | |
3982 | else | |
3983 | preferred = 0; | |
f56619fc BH |
3984 | if (valid != INFINITY_LIFE_TIME) { |
3985 | if (valid > tval) | |
3986 | valid -= tval; | |
3987 | else | |
3988 | valid = 0; | |
3989 | } | |
1da177e4 LT |
3990 | } |
3991 | } else { | |
85486af0 TG |
3992 | preferred = INFINITY_LIFE_TIME; |
3993 | valid = INFINITY_LIFE_TIME; | |
3994 | } | |
3995 | ||
7996c799 | 3996 | if (!ipv6_addr_any(&ifa->peer_addr)) { |
caeaba79 ND |
3997 | if (nla_put(skb, IFA_LOCAL, 16, &ifa->addr) < 0 || |
3998 | nla_put(skb, IFA_ADDRESS, 16, &ifa->peer_addr) < 0) | |
3999 | goto error; | |
4000 | } else | |
4001 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0) | |
4002 | goto error; | |
4003 | ||
4004 | if (put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) | |
4005 | goto error; | |
1da177e4 | 4006 | |
479840ff JP |
4007 | if (nla_put_u32(skb, IFA_FLAGS, ifa->flags) < 0) |
4008 | goto error; | |
4009 | ||
0ab6803b | 4010 | return nlmsg_end(skb, nlh); |
caeaba79 ND |
4011 | |
4012 | error: | |
4013 | nlmsg_cancel(skb, nlh); | |
4014 | return -EMSGSIZE; | |
1da177e4 LT |
4015 | } |
4016 | ||
4017 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
15e47304 | 4018 | u32 portid, u32 seq, int event, u16 flags) |
1da177e4 | 4019 | { |
1da177e4 | 4020 | struct nlmsghdr *nlh; |
101bb229 TG |
4021 | u8 scope = RT_SCOPE_UNIVERSE; |
4022 | int ifindex = ifmca->idev->dev->ifindex; | |
4023 | ||
4024 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
4025 | scope = RT_SCOPE_SITE; | |
1da177e4 | 4026 | |
15e47304 | 4027 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
0ab6803b | 4028 | if (nlh == NULL) |
26932566 | 4029 | return -EMSGSIZE; |
85486af0 | 4030 | |
0ab6803b TG |
4031 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
4032 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
4033 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
26932566 PM |
4034 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
4035 | nlmsg_cancel(skb, nlh); | |
4036 | return -EMSGSIZE; | |
4037 | } | |
85486af0 | 4038 | |
0ab6803b | 4039 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
4040 | } |
4041 | ||
4042 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
15e47304 | 4043 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4044 | { |
1da177e4 | 4045 | struct nlmsghdr *nlh; |
101bb229 TG |
4046 | u8 scope = RT_SCOPE_UNIVERSE; |
4047 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
4048 | ||
4049 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
4050 | scope = RT_SCOPE_SITE; | |
1da177e4 | 4051 | |
15e47304 | 4052 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
0ab6803b | 4053 | if (nlh == NULL) |
26932566 | 4054 | return -EMSGSIZE; |
85486af0 | 4055 | |
0ab6803b TG |
4056 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
4057 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
4058 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
26932566 PM |
4059 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
4060 | nlmsg_cancel(skb, nlh); | |
4061 | return -EMSGSIZE; | |
4062 | } | |
1da177e4 | 4063 | |
0ab6803b | 4064 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
4065 | } |
4066 | ||
e21e8467 | 4067 | enum addr_type_t { |
1da177e4 LT |
4068 | UNICAST_ADDR, |
4069 | MULTICAST_ADDR, | |
4070 | ANYCAST_ADDR, | |
4071 | }; | |
4072 | ||
234b27c3 ED |
4073 | /* called with rcu_read_lock() */ |
4074 | static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb, | |
4075 | struct netlink_callback *cb, enum addr_type_t type, | |
4076 | int s_ip_idx, int *p_ip_idx) | |
4077 | { | |
234b27c3 ED |
4078 | struct ifmcaddr6 *ifmca; |
4079 | struct ifacaddr6 *ifaca; | |
4080 | int err = 1; | |
4081 | int ip_idx = *p_ip_idx; | |
4082 | ||
4083 | read_lock_bh(&idev->lock); | |
4084 | switch (type) { | |
502a2ffd | 4085 | case UNICAST_ADDR: { |
4086 | struct inet6_ifaddr *ifa; | |
4087 | ||
234b27c3 | 4088 | /* unicast address incl. temp addr */ |
502a2ffd | 4089 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
4090 | if (++ip_idx < s_ip_idx) | |
234b27c3 ED |
4091 | continue; |
4092 | err = inet6_fill_ifaddr(skb, ifa, | |
15e47304 | 4093 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4094 | cb->nlh->nlmsg_seq, |
4095 | RTM_NEWADDR, | |
4096 | NLM_F_MULTI); | |
4097 | if (err <= 0) | |
4098 | break; | |
63998ac2 | 4099 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
234b27c3 ED |
4100 | } |
4101 | break; | |
502a2ffd | 4102 | } |
234b27c3 ED |
4103 | case MULTICAST_ADDR: |
4104 | /* multicast address */ | |
4105 | for (ifmca = idev->mc_list; ifmca; | |
4106 | ifmca = ifmca->next, ip_idx++) { | |
4107 | if (ip_idx < s_ip_idx) | |
4108 | continue; | |
4109 | err = inet6_fill_ifmcaddr(skb, ifmca, | |
15e47304 | 4110 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4111 | cb->nlh->nlmsg_seq, |
4112 | RTM_GETMULTICAST, | |
4113 | NLM_F_MULTI); | |
4114 | if (err <= 0) | |
4115 | break; | |
4116 | } | |
4117 | break; | |
4118 | case ANYCAST_ADDR: | |
4119 | /* anycast address */ | |
4120 | for (ifaca = idev->ac_list; ifaca; | |
4121 | ifaca = ifaca->aca_next, ip_idx++) { | |
4122 | if (ip_idx < s_ip_idx) | |
4123 | continue; | |
4124 | err = inet6_fill_ifacaddr(skb, ifaca, | |
15e47304 | 4125 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4126 | cb->nlh->nlmsg_seq, |
4127 | RTM_GETANYCAST, | |
4128 | NLM_F_MULTI); | |
4129 | if (err <= 0) | |
4130 | break; | |
4131 | } | |
4132 | break; | |
4133 | default: | |
4134 | break; | |
4135 | } | |
4136 | read_unlock_bh(&idev->lock); | |
4137 | *p_ip_idx = ip_idx; | |
4138 | return err; | |
4139 | } | |
4140 | ||
1da177e4 LT |
4141 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, |
4142 | enum addr_type_t type) | |
4143 | { | |
234b27c3 ED |
4144 | struct net *net = sock_net(skb->sk); |
4145 | int h, s_h; | |
1da177e4 LT |
4146 | int idx, ip_idx; |
4147 | int s_idx, s_ip_idx; | |
1da177e4 | 4148 | struct net_device *dev; |
234b27c3 ED |
4149 | struct inet6_dev *idev; |
4150 | struct hlist_head *head; | |
1ab1457c | 4151 | |
234b27c3 ED |
4152 | s_h = cb->args[0]; |
4153 | s_idx = idx = cb->args[1]; | |
4154 | s_ip_idx = ip_idx = cb->args[2]; | |
5d5619b4 | 4155 | |
234b27c3 | 4156 | rcu_read_lock(); |
63998ac2 | 4157 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ net->dev_base_seq; |
234b27c3 ED |
4158 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
4159 | idx = 0; | |
4160 | head = &net->dev_index_head[h]; | |
b67bfe0d | 4161 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
234b27c3 ED |
4162 | if (idx < s_idx) |
4163 | goto cont; | |
4b97efdf | 4164 | if (h > s_h || idx > s_idx) |
234b27c3 ED |
4165 | s_ip_idx = 0; |
4166 | ip_idx = 0; | |
e21e8467 SH |
4167 | idev = __in6_dev_get(dev); |
4168 | if (!idev) | |
234b27c3 ED |
4169 | goto cont; |
4170 | ||
4171 | if (in6_dump_addrs(idev, skb, cb, type, | |
4172 | s_ip_idx, &ip_idx) <= 0) | |
4173 | goto done; | |
7562f876 | 4174 | cont: |
234b27c3 ED |
4175 | idx++; |
4176 | } | |
1da177e4 | 4177 | } |
234b27c3 ED |
4178 | done: |
4179 | rcu_read_unlock(); | |
4180 | cb->args[0] = h; | |
4181 | cb->args[1] = idx; | |
4182 | cb->args[2] = ip_idx; | |
4183 | ||
1da177e4 LT |
4184 | return skb->len; |
4185 | } | |
4186 | ||
4187 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4188 | { | |
4189 | enum addr_type_t type = UNICAST_ADDR; | |
b854272b | 4190 | |
1da177e4 LT |
4191 | return inet6_dump_addr(skb, cb, type); |
4192 | } | |
4193 | ||
4194 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4195 | { | |
4196 | enum addr_type_t type = MULTICAST_ADDR; | |
b854272b | 4197 | |
1da177e4 LT |
4198 | return inet6_dump_addr(skb, cb, type); |
4199 | } | |
4200 | ||
4201 | ||
4202 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4203 | { | |
4204 | enum addr_type_t type = ANYCAST_ADDR; | |
b854272b | 4205 | |
1da177e4 LT |
4206 | return inet6_dump_addr(skb, cb, type); |
4207 | } | |
4208 | ||
661d2967 | 4209 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh) |
6c223828 | 4210 | { |
3b1e0a65 | 4211 | struct net *net = sock_net(in_skb->sk); |
1b29fc2c TG |
4212 | struct ifaddrmsg *ifm; |
4213 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 4214 | struct in6_addr *addr = NULL, *peer; |
6c223828 NT |
4215 | struct net_device *dev = NULL; |
4216 | struct inet6_ifaddr *ifa; | |
4217 | struct sk_buff *skb; | |
6c223828 NT |
4218 | int err; |
4219 | ||
1b29fc2c TG |
4220 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
4221 | if (err < 0) | |
4222 | goto errout; | |
4223 | ||
caeaba79 | 4224 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer); |
1b29fc2c TG |
4225 | if (addr == NULL) { |
4226 | err = -EINVAL; | |
4227 | goto errout; | |
6c223828 | 4228 | } |
6c223828 | 4229 | |
1b29fc2c | 4230 | ifm = nlmsg_data(nlh); |
6c223828 | 4231 | if (ifm->ifa_index) |
6fda7350 | 4232 | dev = __dev_get_by_index(net, ifm->ifa_index); |
6c223828 | 4233 | |
e21e8467 SH |
4234 | ifa = ipv6_get_ifaddr(net, addr, dev, 1); |
4235 | if (!ifa) { | |
1b29fc2c TG |
4236 | err = -EADDRNOTAVAIL; |
4237 | goto errout; | |
4238 | } | |
6c223828 | 4239 | |
e21e8467 SH |
4240 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL); |
4241 | if (!skb) { | |
6c223828 | 4242 | err = -ENOBUFS; |
1b29fc2c | 4243 | goto errout_ifa; |
6c223828 NT |
4244 | } |
4245 | ||
15e47304 | 4246 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).portid, |
6c223828 | 4247 | nlh->nlmsg_seq, RTM_NEWADDR, 0); |
26932566 PM |
4248 | if (err < 0) { |
4249 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
4250 | WARN_ON(err == -EMSGSIZE); | |
4251 | kfree_skb(skb); | |
4252 | goto errout_ifa; | |
4253 | } | |
15e47304 | 4254 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); |
1b29fc2c | 4255 | errout_ifa: |
6c223828 | 4256 | in6_ifa_put(ifa); |
1b29fc2c | 4257 | errout: |
6c223828 | 4258 | return err; |
6c223828 NT |
4259 | } |
4260 | ||
1da177e4 LT |
4261 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
4262 | { | |
4263 | struct sk_buff *skb; | |
c346dca1 | 4264 | struct net *net = dev_net(ifa->idev->dev); |
5d620266 | 4265 | int err = -ENOBUFS; |
1da177e4 | 4266 | |
0ab6803b | 4267 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d620266 TG |
4268 | if (skb == NULL) |
4269 | goto errout; | |
4270 | ||
4271 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
4272 | if (err < 0) { |
4273 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
4274 | WARN_ON(err == -EMSGSIZE); | |
4275 | kfree_skb(skb); | |
4276 | goto errout; | |
4277 | } | |
1ce85fe4 PNA |
4278 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
4279 | return; | |
5d620266 TG |
4280 | errout: |
4281 | if (err < 0) | |
6fda7350 | 4282 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
4283 | } |
4284 | ||
b6f99a21 | 4285 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
4286 | __s32 *array, int bytes) |
4287 | { | |
04561c1f TG |
4288 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
4289 | ||
1da177e4 LT |
4290 | memset(array, 0, bytes); |
4291 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
4292 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
4293 | array[DEVCONF_MTU6] = cnf->mtu6; | |
4294 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
4295 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
4296 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
4297 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
4298 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
93908d19 TG |
4299 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = |
4300 | jiffies_to_msecs(cnf->rtr_solicit_interval); | |
4301 | array[DEVCONF_RTR_SOLICIT_DELAY] = | |
4302 | jiffies_to_msecs(cnf->rtr_solicit_delay); | |
1da177e4 | 4303 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; |
fc4eba58 HFS |
4304 | array[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL] = |
4305 | jiffies_to_msecs(cnf->mldv1_unsolicited_report_interval); | |
4306 | array[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL] = | |
4307 | jiffies_to_msecs(cnf->mldv2_unsolicited_report_interval); | |
1da177e4 LT |
4308 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; |
4309 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
4310 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
4311 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
4312 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
1da177e4 | 4313 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; |
65f5c7c1 | 4314 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 4315 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
4316 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4317 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
93908d19 TG |
4318 | array[DEVCONF_RTR_PROBE_INTERVAL] = |
4319 | jiffies_to_msecs(cnf->rtr_probe_interval); | |
fa03ef38 | 4320 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
4321 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
4322 | #endif | |
930d6ff2 | 4323 | #endif |
fbea49e1 | 4324 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 4325 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
4326 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4327 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
4328 | #endif | |
7bc570c8 YH |
4329 | #ifdef CONFIG_IPV6_MROUTE |
4330 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; | |
4331 | #endif | |
778d80be | 4332 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
1b34be74 | 4333 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
c3faca05 | 4334 | array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao; |
5cb04436 | 4335 | array[DEVCONF_NDISC_NOTIFY] = cnf->ndisc_notify; |
b800c3b9 | 4336 | array[DEVCONF_SUPPRESS_FRAG_NDISC] = cnf->suppress_frag_ndisc; |
d9333196 | 4337 | array[DEVCONF_ACCEPT_RA_FROM_LOCAL] = cnf->accept_ra_from_local; |
1da177e4 LT |
4338 | } |
4339 | ||
b382b191 TG |
4340 | static inline size_t inet6_ifla6_size(void) |
4341 | { | |
4342 | return nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
4343 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
4344 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
4345 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ | |
f53adae4 DB |
4346 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ |
4347 | + nla_total_size(sizeof(struct in6_addr)); /* IFLA_INET6_TOKEN */ | |
b382b191 TG |
4348 | } |
4349 | ||
339bf98f TG |
4350 | static inline size_t inet6_if_nlmsg_size(void) |
4351 | { | |
4352 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
4353 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
4354 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
4355 | + nla_total_size(4) /* IFLA_MTU */ | |
4356 | + nla_total_size(4) /* IFLA_LINK */ | |
b382b191 | 4357 | + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */ |
339bf98f | 4358 | } |
c5396a31 | 4359 | |
be281e55 | 4360 | static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib, |
7d720c3e | 4361 | int items, int bytes) |
7f7d9a6b HX |
4362 | { |
4363 | int i; | |
4364 | int pad = bytes - sizeof(u64) * items; | |
4365 | BUG_ON(pad < 0); | |
4366 | ||
4367 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
4368 | put_unaligned(items, &stats[0]); | |
4369 | for (i = 1; i < items; i++) | |
be281e55 | 4370 | put_unaligned(atomic_long_read(&mib[i]), &stats[i]); |
7f7d9a6b HX |
4371 | |
4372 | memset(&stats[items], 0, pad); | |
4373 | } | |
4374 | ||
698365fa | 4375 | static inline void __snmp6_fill_stats64(u64 *stats, void __percpu *mib, |
4ce3c183 ED |
4376 | int items, int bytes, size_t syncpoff) |
4377 | { | |
4378 | int i; | |
4379 | int pad = bytes - sizeof(u64) * items; | |
4380 | BUG_ON(pad < 0); | |
4381 | ||
4382 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
4383 | put_unaligned(items, &stats[0]); | |
4384 | for (i = 1; i < items; i++) | |
4385 | put_unaligned(snmp_fold_field64(mib, i, syncpoff), &stats[i]); | |
4386 | ||
4387 | memset(&stats[items], 0, pad); | |
4388 | } | |
4389 | ||
7f7d9a6b HX |
4390 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, |
4391 | int bytes) | |
4392 | { | |
e21e8467 | 4393 | switch (attrtype) { |
7f7d9a6b | 4394 | case IFLA_INET6_STATS: |
698365fa | 4395 | __snmp6_fill_stats64(stats, idev->stats.ipv6, |
4ce3c183 | 4396 | IPSTATS_MIB_MAX, bytes, offsetof(struct ipstats_mib, syncp)); |
7f7d9a6b HX |
4397 | break; |
4398 | case IFLA_INET6_ICMP6STATS: | |
be281e55 | 4399 | __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, ICMP6_MIB_MAX, bytes); |
7f7d9a6b HX |
4400 | break; |
4401 | } | |
4402 | } | |
4403 | ||
b382b191 TG |
4404 | static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev) |
4405 | { | |
4406 | struct nlattr *nla; | |
4407 | struct ifla_cacheinfo ci; | |
4408 | ||
c78679e8 DM |
4409 | if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags)) |
4410 | goto nla_put_failure; | |
b382b191 | 4411 | ci.max_reasm_len = IPV6_MAXPLEN; |
24912420 DM |
4412 | ci.tstamp = cstamp_delta(idev->tstamp); |
4413 | ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time); | |
1f9248e5 | 4414 | ci.retrans_time = jiffies_to_msecs(NEIGH_VAR(idev->nd_parms, RETRANS_TIME)); |
c78679e8 DM |
4415 | if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci)) |
4416 | goto nla_put_failure; | |
b382b191 TG |
4417 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
4418 | if (nla == NULL) | |
4419 | goto nla_put_failure; | |
4420 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); | |
4421 | ||
4422 | /* XXX - MC not implemented */ | |
4423 | ||
4424 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); | |
4425 | if (nla == NULL) | |
4426 | goto nla_put_failure; | |
4427 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
4428 | ||
4429 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
4430 | if (nla == NULL) | |
4431 | goto nla_put_failure; | |
4432 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
4433 | ||
f53adae4 DB |
4434 | nla = nla_reserve(skb, IFLA_INET6_TOKEN, sizeof(struct in6_addr)); |
4435 | if (nla == NULL) | |
4436 | goto nla_put_failure; | |
bc91b0f0 JP |
4437 | |
4438 | if (nla_put_u8(skb, IFLA_INET6_ADDR_GEN_MODE, idev->addr_gen_mode)) | |
4439 | goto nla_put_failure; | |
4440 | ||
f53adae4 DB |
4441 | read_lock_bh(&idev->lock); |
4442 | memcpy(nla_data(nla), idev->token.s6_addr, nla_len(nla)); | |
4443 | read_unlock_bh(&idev->lock); | |
4444 | ||
b382b191 TG |
4445 | return 0; |
4446 | ||
4447 | nla_put_failure: | |
4448 | return -EMSGSIZE; | |
4449 | } | |
4450 | ||
4451 | static size_t inet6_get_link_af_size(const struct net_device *dev) | |
4452 | { | |
4453 | if (!__in6_dev_get(dev)) | |
4454 | return 0; | |
4455 | ||
4456 | return inet6_ifla6_size(); | |
4457 | } | |
4458 | ||
4459 | static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev) | |
4460 | { | |
4461 | struct inet6_dev *idev = __in6_dev_get(dev); | |
4462 | ||
4463 | if (!idev) | |
4464 | return -ENODATA; | |
4465 | ||
4466 | if (inet6_fill_ifla6_attrs(skb, idev) < 0) | |
4467 | return -EMSGSIZE; | |
4468 | ||
4469 | return 0; | |
4470 | } | |
4471 | ||
f53adae4 DB |
4472 | static int inet6_set_iftoken(struct inet6_dev *idev, struct in6_addr *token) |
4473 | { | |
f53adae4 DB |
4474 | struct inet6_ifaddr *ifp; |
4475 | struct net_device *dev = idev->dev; | |
fc403832 | 4476 | bool update_rs = false; |
dc848292 | 4477 | struct in6_addr ll_addr; |
f53adae4 | 4478 | |
c15b1cca HFS |
4479 | ASSERT_RTNL(); |
4480 | ||
f53adae4 DB |
4481 | if (token == NULL) |
4482 | return -EINVAL; | |
4483 | if (ipv6_addr_any(token)) | |
4484 | return -EINVAL; | |
4485 | if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) | |
4486 | return -EINVAL; | |
f53adae4 DB |
4487 | if (!ipv6_accept_ra(idev)) |
4488 | return -EINVAL; | |
4489 | if (idev->cnf.rtr_solicits <= 0) | |
4490 | return -EINVAL; | |
4491 | ||
4492 | write_lock_bh(&idev->lock); | |
4493 | ||
4494 | BUILD_BUG_ON(sizeof(token->s6_addr) != 16); | |
4495 | memcpy(idev->token.s6_addr + 8, token->s6_addr + 8, 8); | |
4496 | ||
4497 | write_unlock_bh(&idev->lock); | |
4498 | ||
dc848292 HFS |
4499 | if (!idev->dead && (idev->if_flags & IF_READY) && |
4500 | !ipv6_get_lladdr(dev, &ll_addr, IFA_F_TENTATIVE | | |
4501 | IFA_F_OPTIMISTIC)) { | |
fc403832 DB |
4502 | |
4503 | /* If we're not ready, then normal ifup will take care | |
4504 | * of this. Otherwise, we need to request our rs here. | |
4505 | */ | |
4506 | ndisc_send_rs(dev, &ll_addr, &in6addr_linklocal_allrouters); | |
4507 | update_rs = true; | |
4508 | } | |
f53adae4 DB |
4509 | |
4510 | write_lock_bh(&idev->lock); | |
fc403832 | 4511 | |
77ecaace | 4512 | if (update_rs) { |
fc403832 | 4513 | idev->if_flags |= IF_RS_SENT; |
77ecaace HFS |
4514 | idev->rs_probes = 1; |
4515 | addrconf_mod_rs_timer(idev, idev->cnf.rtr_solicit_interval); | |
4516 | } | |
f53adae4 DB |
4517 | |
4518 | /* Well, that's kinda nasty ... */ | |
4519 | list_for_each_entry(ifp, &idev->addr_list, if_list) { | |
4520 | spin_lock(&ifp->lock); | |
617fe29d | 4521 | if (ifp->tokenized) { |
f53adae4 DB |
4522 | ifp->valid_lft = 0; |
4523 | ifp->prefered_lft = 0; | |
4524 | } | |
4525 | spin_unlock(&ifp->lock); | |
4526 | } | |
4527 | ||
4528 | write_unlock_bh(&idev->lock); | |
c15b1cca | 4529 | addrconf_verify_rtnl(); |
f53adae4 DB |
4530 | return 0; |
4531 | } | |
4532 | ||
4533 | static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla) | |
4534 | { | |
4535 | int err = -EINVAL; | |
4536 | struct inet6_dev *idev = __in6_dev_get(dev); | |
4537 | struct nlattr *tb[IFLA_INET6_MAX + 1]; | |
4538 | ||
4539 | if (!idev) | |
4540 | return -EAFNOSUPPORT; | |
4541 | ||
4542 | if (nla_parse_nested(tb, IFLA_INET6_MAX, nla, NULL) < 0) | |
4543 | BUG(); | |
4544 | ||
bc91b0f0 | 4545 | if (tb[IFLA_INET6_TOKEN]) { |
f53adae4 | 4546 | err = inet6_set_iftoken(idev, nla_data(tb[IFLA_INET6_TOKEN])); |
bc91b0f0 JP |
4547 | if (err) |
4548 | return err; | |
4549 | } | |
4550 | ||
4551 | if (tb[IFLA_INET6_ADDR_GEN_MODE]) { | |
4552 | u8 mode = nla_get_u8(tb[IFLA_INET6_ADDR_GEN_MODE]); | |
4553 | ||
4554 | if (mode != IN6_ADDR_GEN_MODE_EUI64 && | |
4555 | mode != IN6_ADDR_GEN_MODE_NONE) | |
4556 | return -EINVAL; | |
4557 | idev->addr_gen_mode = mode; | |
4558 | err = 0; | |
4559 | } | |
f53adae4 DB |
4560 | |
4561 | return err; | |
4562 | } | |
4563 | ||
1ab1457c | 4564 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 4565 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4566 | { |
04561c1f | 4567 | struct net_device *dev = idev->dev; |
04561c1f TG |
4568 | struct ifinfomsg *hdr; |
4569 | struct nlmsghdr *nlh; | |
4570 | void *protoinfo; | |
04561c1f | 4571 | |
15e47304 | 4572 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*hdr), flags); |
04561c1f | 4573 | if (nlh == NULL) |
26932566 | 4574 | return -EMSGSIZE; |
04561c1f TG |
4575 | |
4576 | hdr = nlmsg_data(nlh); | |
4577 | hdr->ifi_family = AF_INET6; | |
4578 | hdr->__ifi_pad = 0; | |
4579 | hdr->ifi_type = dev->type; | |
4580 | hdr->ifi_index = dev->ifindex; | |
4581 | hdr->ifi_flags = dev_get_flags(dev); | |
4582 | hdr->ifi_change = 0; | |
4583 | ||
c78679e8 DM |
4584 | if (nla_put_string(skb, IFLA_IFNAME, dev->name) || |
4585 | (dev->addr_len && | |
4586 | nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || | |
4587 | nla_put_u32(skb, IFLA_MTU, dev->mtu) || | |
4588 | (dev->ifindex != dev->iflink && | |
4589 | nla_put_u32(skb, IFLA_LINK, dev->iflink))) | |
4590 | goto nla_put_failure; | |
04561c1f TG |
4591 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
4592 | if (protoinfo == NULL) | |
4593 | goto nla_put_failure; | |
1da177e4 | 4594 | |
b382b191 | 4595 | if (inet6_fill_ifla6_attrs(skb, idev) < 0) |
bf99f1bd | 4596 | goto nla_put_failure; |
1da177e4 | 4597 | |
04561c1f TG |
4598 | nla_nest_end(skb, protoinfo); |
4599 | return nlmsg_end(skb, nlh); | |
1da177e4 | 4600 | |
04561c1f | 4601 | nla_put_failure: |
26932566 PM |
4602 | nlmsg_cancel(skb, nlh); |
4603 | return -EMSGSIZE; | |
1da177e4 LT |
4604 | } |
4605 | ||
4606 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
4607 | { | |
3b1e0a65 | 4608 | struct net *net = sock_net(skb->sk); |
84d2697d | 4609 | int h, s_h; |
434a8a58 | 4610 | int idx = 0, s_idx; |
1da177e4 LT |
4611 | struct net_device *dev; |
4612 | struct inet6_dev *idev; | |
84d2697d | 4613 | struct hlist_head *head; |
1da177e4 | 4614 | |
84d2697d ED |
4615 | s_h = cb->args[0]; |
4616 | s_idx = cb->args[1]; | |
4617 | ||
4618 | rcu_read_lock(); | |
4619 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
4620 | idx = 0; | |
4621 | head = &net->dev_index_head[h]; | |
b67bfe0d | 4622 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
84d2697d ED |
4623 | if (idx < s_idx) |
4624 | goto cont; | |
4625 | idev = __in6_dev_get(dev); | |
4626 | if (!idev) | |
4627 | goto cont; | |
4628 | if (inet6_fill_ifinfo(skb, idev, | |
15e47304 | 4629 | NETLINK_CB(cb->skb).portid, |
84d2697d ED |
4630 | cb->nlh->nlmsg_seq, |
4631 | RTM_NEWLINK, NLM_F_MULTI) <= 0) | |
4632 | goto out; | |
7562f876 | 4633 | cont: |
84d2697d ED |
4634 | idx++; |
4635 | } | |
1da177e4 | 4636 | } |
84d2697d ED |
4637 | out: |
4638 | rcu_read_unlock(); | |
4639 | cb->args[1] = idx; | |
4640 | cb->args[0] = h; | |
1da177e4 LT |
4641 | |
4642 | return skb->len; | |
4643 | } | |
4644 | ||
4645 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
4646 | { | |
4647 | struct sk_buff *skb; | |
c346dca1 | 4648 | struct net *net = dev_net(idev->dev); |
8d7a76c9 | 4649 | int err = -ENOBUFS; |
1ab1457c | 4650 | |
339bf98f | 4651 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9 TG |
4652 | if (skb == NULL) |
4653 | goto errout; | |
4654 | ||
4655 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
4656 | if (err < 0) { |
4657 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
4658 | WARN_ON(err == -EMSGSIZE); | |
4659 | kfree_skb(skb); | |
4660 | goto errout; | |
4661 | } | |
5f75a104 | 4662 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC); |
1ce85fe4 | 4663 | return; |
8d7a76c9 TG |
4664 | errout: |
4665 | if (err < 0) | |
5f75a104 | 4666 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err); |
1da177e4 LT |
4667 | } |
4668 | ||
339bf98f TG |
4669 | static inline size_t inet6_prefix_nlmsg_size(void) |
4670 | { | |
4671 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
4672 | + nla_total_size(sizeof(struct in6_addr)) | |
4673 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
4674 | } | |
c5396a31 | 4675 | |
1da177e4 | 4676 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 4677 | struct prefix_info *pinfo, u32 portid, u32 seq, |
6051e2f4 | 4678 | int event, unsigned int flags) |
1da177e4 | 4679 | { |
6051e2f4 TG |
4680 | struct prefixmsg *pmsg; |
4681 | struct nlmsghdr *nlh; | |
1da177e4 LT |
4682 | struct prefix_cacheinfo ci; |
4683 | ||
15e47304 | 4684 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*pmsg), flags); |
6051e2f4 | 4685 | if (nlh == NULL) |
26932566 | 4686 | return -EMSGSIZE; |
6051e2f4 TG |
4687 | |
4688 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 4689 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
4690 | pmsg->prefix_pad1 = 0; |
4691 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
4692 | pmsg->prefix_ifindex = idev->dev->ifindex; |
4693 | pmsg->prefix_len = pinfo->prefix_len; | |
4694 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 4695 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
4696 | pmsg->prefix_flags = 0; |
4697 | if (pinfo->onlink) | |
4698 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
4699 | if (pinfo->autoconf) | |
4700 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
4701 | ||
c78679e8 DM |
4702 | if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix)) |
4703 | goto nla_put_failure; | |
1da177e4 LT |
4704 | ci.preferred_time = ntohl(pinfo->prefered); |
4705 | ci.valid_time = ntohl(pinfo->valid); | |
c78679e8 DM |
4706 | if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci)) |
4707 | goto nla_put_failure; | |
6051e2f4 | 4708 | return nlmsg_end(skb, nlh); |
1da177e4 | 4709 | |
6051e2f4 | 4710 | nla_put_failure: |
26932566 PM |
4711 | nlmsg_cancel(skb, nlh); |
4712 | return -EMSGSIZE; | |
1da177e4 LT |
4713 | } |
4714 | ||
1ab1457c | 4715 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
4716 | struct prefix_info *pinfo) |
4717 | { | |
4718 | struct sk_buff *skb; | |
c346dca1 | 4719 | struct net *net = dev_net(idev->dev); |
8c384bfa | 4720 | int err = -ENOBUFS; |
1da177e4 | 4721 | |
339bf98f | 4722 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa TG |
4723 | if (skb == NULL) |
4724 | goto errout; | |
4725 | ||
4726 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
4727 | if (err < 0) { |
4728 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
4729 | WARN_ON(err == -EMSGSIZE); | |
4730 | kfree_skb(skb); | |
4731 | goto errout; | |
4732 | } | |
1ce85fe4 PNA |
4733 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
4734 | return; | |
8c384bfa TG |
4735 | errout: |
4736 | if (err < 0) | |
6fda7350 | 4737 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4 LT |
4738 | } |
4739 | ||
1da177e4 LT |
4740 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
4741 | { | |
63998ac2 ND |
4742 | struct net *net = dev_net(ifp->idev->dev); |
4743 | ||
c15b1cca HFS |
4744 | if (event) |
4745 | ASSERT_RTNL(); | |
4746 | ||
1da177e4 LT |
4747 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); |
4748 | ||
4749 | switch (event) { | |
4750 | case RTM_NEWADDR: | |
95c385b4 NH |
4751 | /* |
4752 | * If the address was optimistic | |
4753 | * we inserted the route at the start of | |
4754 | * our DAD process, so we don't need | |
4755 | * to do it again | |
4756 | */ | |
4757 | if (!(ifp->rt->rt6i_node)) | |
4758 | ip6_ins_rt(ifp->rt); | |
1da177e4 LT |
4759 | if (ifp->idev->cnf.forwarding) |
4760 | addrconf_join_anycast(ifp); | |
7996c799 | 4761 | if (!ipv6_addr_any(&ifp->peer_addr)) |
caeaba79 ND |
4762 | addrconf_prefix_route(&ifp->peer_addr, 128, |
4763 | ifp->idev->dev, 0, 0); | |
1da177e4 LT |
4764 | break; |
4765 | case RTM_DELADDR: | |
4766 | if (ifp->idev->cnf.forwarding) | |
4767 | addrconf_leave_anycast(ifp); | |
4768 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
7996c799 | 4769 | if (!ipv6_addr_any(&ifp->peer_addr)) { |
caeaba79 | 4770 | struct rt6_info *rt; |
caeaba79 | 4771 | |
e7478dfc ND |
4772 | rt = addrconf_get_prefix_route(&ifp->peer_addr, 128, |
4773 | ifp->idev->dev, 0, 0); | |
f24062b0 ND |
4774 | if (rt && ip6_del_rt(rt)) |
4775 | dst_free(&rt->dst); | |
caeaba79 | 4776 | } |
d8d1f30b | 4777 | dst_hold(&ifp->rt->dst); |
93fa159a | 4778 | |
73a8bd74 | 4779 | if (ip6_del_rt(ifp->rt)) |
d8d1f30b | 4780 | dst_free(&ifp->rt->dst); |
1da177e4 LT |
4781 | break; |
4782 | } | |
63998ac2 | 4783 | atomic_inc(&net->ipv6.dev_addr_genid); |
439677d7 | 4784 | rt_genid_bump_ipv6(net); |
1da177e4 LT |
4785 | } |
4786 | ||
4787 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
4788 | { | |
8814c4b5 | 4789 | rcu_read_lock_bh(); |
1da177e4 LT |
4790 | if (likely(ifp->idev->dead == 0)) |
4791 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 4792 | rcu_read_unlock_bh(); |
1da177e4 LT |
4793 | } |
4794 | ||
4795 | #ifdef CONFIG_SYSCTL | |
4796 | ||
4797 | static | |
fe2c6338 | 4798 | int addrconf_sysctl_forward(struct ctl_table *ctl, int write, |
1da177e4 LT |
4799 | void __user *buffer, size_t *lenp, loff_t *ppos) |
4800 | { | |
4801 | int *valp = ctl->data; | |
4802 | int val = *valp; | |
88af182e | 4803 | loff_t pos = *ppos; |
fe2c6338 | 4804 | struct ctl_table lctl; |
1da177e4 LT |
4805 | int ret; |
4806 | ||
013d97e9 FR |
4807 | /* |
4808 | * ctl->data points to idev->cnf.forwarding, we should | |
4809 | * not modify it until we get the rtnl lock. | |
4810 | */ | |
4811 | lctl = *ctl; | |
4812 | lctl.data = &val; | |
4813 | ||
4814 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
1da177e4 | 4815 | |
c8fecf22 | 4816 | if (write) |
b325fddb | 4817 | ret = addrconf_fixup_forwarding(ctl, valp, val); |
88af182e EB |
4818 | if (ret) |
4819 | *ppos = pos; | |
1ab1457c | 4820 | return ret; |
1da177e4 LT |
4821 | } |
4822 | ||
56d417b1 BH |
4823 | static void dev_disable_change(struct inet6_dev *idev) |
4824 | { | |
75538c2b CW |
4825 | struct netdev_notifier_info info; |
4826 | ||
56d417b1 BH |
4827 | if (!idev || !idev->dev) |
4828 | return; | |
4829 | ||
75538c2b | 4830 | netdev_notifier_info_init(&info, idev->dev); |
56d417b1 | 4831 | if (idev->cnf.disable_ipv6) |
75538c2b | 4832 | addrconf_notify(NULL, NETDEV_DOWN, &info); |
56d417b1 | 4833 | else |
75538c2b | 4834 | addrconf_notify(NULL, NETDEV_UP, &info); |
56d417b1 BH |
4835 | } |
4836 | ||
4837 | static void addrconf_disable_change(struct net *net, __s32 newf) | |
4838 | { | |
4839 | struct net_device *dev; | |
4840 | struct inet6_dev *idev; | |
4841 | ||
c6d14c84 ED |
4842 | rcu_read_lock(); |
4843 | for_each_netdev_rcu(net, dev) { | |
56d417b1 BH |
4844 | idev = __in6_dev_get(dev); |
4845 | if (idev) { | |
4846 | int changed = (!idev->cnf.disable_ipv6) ^ (!newf); | |
4847 | idev->cnf.disable_ipv6 = newf; | |
4848 | if (changed) | |
4849 | dev_disable_change(idev); | |
4850 | } | |
56d417b1 | 4851 | } |
c6d14c84 | 4852 | rcu_read_unlock(); |
56d417b1 BH |
4853 | } |
4854 | ||
013d97e9 | 4855 | static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf) |
56d417b1 BH |
4856 | { |
4857 | struct net *net; | |
013d97e9 FR |
4858 | int old; |
4859 | ||
4860 | if (!rtnl_trylock()) | |
4861 | return restart_syscall(); | |
56d417b1 BH |
4862 | |
4863 | net = (struct net *)table->extra2; | |
013d97e9 FR |
4864 | old = *p; |
4865 | *p = newf; | |
56d417b1 | 4866 | |
013d97e9 FR |
4867 | if (p == &net->ipv6.devconf_dflt->disable_ipv6) { |
4868 | rtnl_unlock(); | |
56d417b1 | 4869 | return 0; |
88af182e | 4870 | } |
56d417b1 BH |
4871 | |
4872 | if (p == &net->ipv6.devconf_all->disable_ipv6) { | |
56d417b1 BH |
4873 | net->ipv6.devconf_dflt->disable_ipv6 = newf; |
4874 | addrconf_disable_change(net, newf); | |
013d97e9 | 4875 | } else if ((!newf) ^ (!old)) |
56d417b1 BH |
4876 | dev_disable_change((struct inet6_dev *)table->extra1); |
4877 | ||
4878 | rtnl_unlock(); | |
4879 | return 0; | |
4880 | } | |
4881 | ||
4882 | static | |
fe2c6338 | 4883 | int addrconf_sysctl_disable(struct ctl_table *ctl, int write, |
56d417b1 BH |
4884 | void __user *buffer, size_t *lenp, loff_t *ppos) |
4885 | { | |
4886 | int *valp = ctl->data; | |
4887 | int val = *valp; | |
88af182e | 4888 | loff_t pos = *ppos; |
fe2c6338 | 4889 | struct ctl_table lctl; |
56d417b1 BH |
4890 | int ret; |
4891 | ||
013d97e9 FR |
4892 | /* |
4893 | * ctl->data points to idev->cnf.disable_ipv6, we should | |
4894 | * not modify it until we get the rtnl lock. | |
4895 | */ | |
4896 | lctl = *ctl; | |
4897 | lctl.data = &val; | |
4898 | ||
4899 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
56d417b1 BH |
4900 | |
4901 | if (write) | |
4902 | ret = addrconf_disable_ipv6(ctl, valp, val); | |
88af182e EB |
4903 | if (ret) |
4904 | *ppos = pos; | |
56d417b1 BH |
4905 | return ret; |
4906 | } | |
4907 | ||
c92d5491 | 4908 | static |
4909 | int addrconf_sysctl_proxy_ndp(struct ctl_table *ctl, int write, | |
4910 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
4911 | { | |
4912 | int *valp = ctl->data; | |
4913 | int ret; | |
4914 | int old, new; | |
4915 | ||
4916 | old = *valp; | |
4917 | ret = proc_dointvec(ctl, write, buffer, lenp, ppos); | |
4918 | new = *valp; | |
4919 | ||
4920 | if (write && old != new) { | |
4921 | struct net *net = ctl->extra2; | |
4922 | ||
4923 | if (!rtnl_trylock()) | |
4924 | return restart_syscall(); | |
4925 | ||
4926 | if (valp == &net->ipv6.devconf_dflt->proxy_ndp) | |
4927 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, | |
4928 | NETCONFA_IFINDEX_DEFAULT, | |
4929 | net->ipv6.devconf_dflt); | |
4930 | else if (valp == &net->ipv6.devconf_all->proxy_ndp) | |
4931 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, | |
4932 | NETCONFA_IFINDEX_ALL, | |
4933 | net->ipv6.devconf_all); | |
4934 | else { | |
4935 | struct inet6_dev *idev = ctl->extra1; | |
4936 | ||
4937 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, | |
4938 | idev->dev->ifindex, | |
4939 | &idev->cnf); | |
4940 | } | |
4941 | rtnl_unlock(); | |
4942 | } | |
4943 | ||
4944 | return ret; | |
4945 | } | |
4946 | ||
4947 | ||
1da177e4 LT |
4948 | static struct addrconf_sysctl_table |
4949 | { | |
4950 | struct ctl_table_header *sysctl_header; | |
fe2c6338 | 4951 | struct ctl_table addrconf_vars[DEVCONF_MAX+1]; |
ab32ea5d | 4952 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
4953 | .sysctl_header = NULL, |
4954 | .addrconf_vars = { | |
1ab1457c | 4955 | { |
e21e8467 SH |
4956 | .procname = "forwarding", |
4957 | .data = &ipv6_devconf.forwarding, | |
4958 | .maxlen = sizeof(int), | |
4959 | .mode = 0644, | |
4960 | .proc_handler = addrconf_sysctl_forward, | |
1da177e4 LT |
4961 | }, |
4962 | { | |
e21e8467 SH |
4963 | .procname = "hop_limit", |
4964 | .data = &ipv6_devconf.hop_limit, | |
4965 | .maxlen = sizeof(int), | |
4966 | .mode = 0644, | |
4967 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4968 | }, |
4969 | { | |
e21e8467 SH |
4970 | .procname = "mtu", |
4971 | .data = &ipv6_devconf.mtu6, | |
4972 | .maxlen = sizeof(int), | |
4973 | .mode = 0644, | |
4974 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4975 | }, |
4976 | { | |
e21e8467 SH |
4977 | .procname = "accept_ra", |
4978 | .data = &ipv6_devconf.accept_ra, | |
4979 | .maxlen = sizeof(int), | |
4980 | .mode = 0644, | |
4981 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4982 | }, |
4983 | { | |
e21e8467 SH |
4984 | .procname = "accept_redirects", |
4985 | .data = &ipv6_devconf.accept_redirects, | |
4986 | .maxlen = sizeof(int), | |
4987 | .mode = 0644, | |
4988 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4989 | }, |
4990 | { | |
e21e8467 SH |
4991 | .procname = "autoconf", |
4992 | .data = &ipv6_devconf.autoconf, | |
4993 | .maxlen = sizeof(int), | |
4994 | .mode = 0644, | |
4995 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4996 | }, |
4997 | { | |
e21e8467 SH |
4998 | .procname = "dad_transmits", |
4999 | .data = &ipv6_devconf.dad_transmits, | |
5000 | .maxlen = sizeof(int), | |
5001 | .mode = 0644, | |
5002 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5003 | }, |
5004 | { | |
e21e8467 SH |
5005 | .procname = "router_solicitations", |
5006 | .data = &ipv6_devconf.rtr_solicits, | |
5007 | .maxlen = sizeof(int), | |
5008 | .mode = 0644, | |
5009 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5010 | }, |
5011 | { | |
e21e8467 SH |
5012 | .procname = "router_solicitation_interval", |
5013 | .data = &ipv6_devconf.rtr_solicit_interval, | |
5014 | .maxlen = sizeof(int), | |
5015 | .mode = 0644, | |
5016 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
5017 | }, |
5018 | { | |
e21e8467 SH |
5019 | .procname = "router_solicitation_delay", |
5020 | .data = &ipv6_devconf.rtr_solicit_delay, | |
5021 | .maxlen = sizeof(int), | |
5022 | .mode = 0644, | |
5023 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
5024 | }, |
5025 | { | |
e21e8467 SH |
5026 | .procname = "force_mld_version", |
5027 | .data = &ipv6_devconf.force_mld_version, | |
5028 | .maxlen = sizeof(int), | |
5029 | .mode = 0644, | |
5030 | .proc_handler = proc_dointvec, | |
1da177e4 | 5031 | }, |
fc4eba58 HFS |
5032 | { |
5033 | .procname = "mldv1_unsolicited_report_interval", | |
5034 | .data = | |
5035 | &ipv6_devconf.mldv1_unsolicited_report_interval, | |
5036 | .maxlen = sizeof(int), | |
5037 | .mode = 0644, | |
5038 | .proc_handler = proc_dointvec_ms_jiffies, | |
5039 | }, | |
5040 | { | |
5041 | .procname = "mldv2_unsolicited_report_interval", | |
5042 | .data = | |
5043 | &ipv6_devconf.mldv2_unsolicited_report_interval, | |
5044 | .maxlen = sizeof(int), | |
5045 | .mode = 0644, | |
5046 | .proc_handler = proc_dointvec_ms_jiffies, | |
5047 | }, | |
1da177e4 | 5048 | { |
e21e8467 SH |
5049 | .procname = "use_tempaddr", |
5050 | .data = &ipv6_devconf.use_tempaddr, | |
5051 | .maxlen = sizeof(int), | |
5052 | .mode = 0644, | |
5053 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5054 | }, |
5055 | { | |
e21e8467 SH |
5056 | .procname = "temp_valid_lft", |
5057 | .data = &ipv6_devconf.temp_valid_lft, | |
5058 | .maxlen = sizeof(int), | |
5059 | .mode = 0644, | |
5060 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5061 | }, |
5062 | { | |
e21e8467 SH |
5063 | .procname = "temp_prefered_lft", |
5064 | .data = &ipv6_devconf.temp_prefered_lft, | |
5065 | .maxlen = sizeof(int), | |
5066 | .mode = 0644, | |
5067 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5068 | }, |
5069 | { | |
e21e8467 SH |
5070 | .procname = "regen_max_retry", |
5071 | .data = &ipv6_devconf.regen_max_retry, | |
5072 | .maxlen = sizeof(int), | |
5073 | .mode = 0644, | |
5074 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5075 | }, |
5076 | { | |
e21e8467 SH |
5077 | .procname = "max_desync_factor", |
5078 | .data = &ipv6_devconf.max_desync_factor, | |
5079 | .maxlen = sizeof(int), | |
5080 | .mode = 0644, | |
5081 | .proc_handler = proc_dointvec, | |
1da177e4 | 5082 | }, |
1da177e4 | 5083 | { |
e21e8467 SH |
5084 | .procname = "max_addresses", |
5085 | .data = &ipv6_devconf.max_addresses, | |
5086 | .maxlen = sizeof(int), | |
5087 | .mode = 0644, | |
5088 | .proc_handler = proc_dointvec, | |
1da177e4 | 5089 | }, |
65f5c7c1 | 5090 | { |
e21e8467 SH |
5091 | .procname = "accept_ra_defrtr", |
5092 | .data = &ipv6_devconf.accept_ra_defrtr, | |
5093 | .maxlen = sizeof(int), | |
5094 | .mode = 0644, | |
5095 | .proc_handler = proc_dointvec, | |
65f5c7c1 | 5096 | }, |
c4fd30eb | 5097 | { |
e21e8467 SH |
5098 | .procname = "accept_ra_pinfo", |
5099 | .data = &ipv6_devconf.accept_ra_pinfo, | |
5100 | .maxlen = sizeof(int), | |
5101 | .mode = 0644, | |
5102 | .proc_handler = proc_dointvec, | |
c4fd30eb | 5103 | }, |
930d6ff2 YH |
5104 | #ifdef CONFIG_IPV6_ROUTER_PREF |
5105 | { | |
e21e8467 SH |
5106 | .procname = "accept_ra_rtr_pref", |
5107 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
5108 | .maxlen = sizeof(int), | |
5109 | .mode = 0644, | |
5110 | .proc_handler = proc_dointvec, | |
930d6ff2 | 5111 | }, |
52e16356 | 5112 | { |
e21e8467 SH |
5113 | .procname = "router_probe_interval", |
5114 | .data = &ipv6_devconf.rtr_probe_interval, | |
5115 | .maxlen = sizeof(int), | |
5116 | .mode = 0644, | |
5117 | .proc_handler = proc_dointvec_jiffies, | |
52e16356 | 5118 | }, |
fa03ef38 | 5119 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 | 5120 | { |
e21e8467 SH |
5121 | .procname = "accept_ra_rt_info_max_plen", |
5122 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
5123 | .maxlen = sizeof(int), | |
5124 | .mode = 0644, | |
5125 | .proc_handler = proc_dointvec, | |
09c884d4 YH |
5126 | }, |
5127 | #endif | |
930d6ff2 | 5128 | #endif |
fbea49e1 | 5129 | { |
e21e8467 SH |
5130 | .procname = "proxy_ndp", |
5131 | .data = &ipv6_devconf.proxy_ndp, | |
5132 | .maxlen = sizeof(int), | |
5133 | .mode = 0644, | |
c92d5491 | 5134 | .proc_handler = addrconf_sysctl_proxy_ndp, |
fbea49e1 | 5135 | }, |
0bcbc926 | 5136 | { |
e21e8467 SH |
5137 | .procname = "accept_source_route", |
5138 | .data = &ipv6_devconf.accept_source_route, | |
5139 | .maxlen = sizeof(int), | |
5140 | .mode = 0644, | |
5141 | .proc_handler = proc_dointvec, | |
0bcbc926 | 5142 | }, |
95c385b4 NH |
5143 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
5144 | { | |
e21e8467 SH |
5145 | .procname = "optimistic_dad", |
5146 | .data = &ipv6_devconf.optimistic_dad, | |
5147 | .maxlen = sizeof(int), | |
5148 | .mode = 0644, | |
5149 | .proc_handler = proc_dointvec, | |
95c385b4 NH |
5150 | |
5151 | }, | |
7bc570c8 YH |
5152 | #endif |
5153 | #ifdef CONFIG_IPV6_MROUTE | |
5154 | { | |
e21e8467 SH |
5155 | .procname = "mc_forwarding", |
5156 | .data = &ipv6_devconf.mc_forwarding, | |
5157 | .maxlen = sizeof(int), | |
5158 | .mode = 0444, | |
5159 | .proc_handler = proc_dointvec, | |
7bc570c8 | 5160 | }, |
95c385b4 | 5161 | #endif |
778d80be | 5162 | { |
e21e8467 SH |
5163 | .procname = "disable_ipv6", |
5164 | .data = &ipv6_devconf.disable_ipv6, | |
5165 | .maxlen = sizeof(int), | |
5166 | .mode = 0644, | |
5167 | .proc_handler = addrconf_sysctl_disable, | |
778d80be | 5168 | }, |
1b34be74 | 5169 | { |
e21e8467 SH |
5170 | .procname = "accept_dad", |
5171 | .data = &ipv6_devconf.accept_dad, | |
5172 | .maxlen = sizeof(int), | |
5173 | .mode = 0644, | |
5174 | .proc_handler = proc_dointvec, | |
1b34be74 | 5175 | }, |
f7734fdf | 5176 | { |
f7734fdf OP |
5177 | .procname = "force_tllao", |
5178 | .data = &ipv6_devconf.force_tllao, | |
5179 | .maxlen = sizeof(int), | |
5180 | .mode = 0644, | |
5181 | .proc_handler = proc_dointvec | |
5182 | }, | |
5cb04436 HFS |
5183 | { |
5184 | .procname = "ndisc_notify", | |
5185 | .data = &ipv6_devconf.ndisc_notify, | |
5186 | .maxlen = sizeof(int), | |
5187 | .mode = 0644, | |
5188 | .proc_handler = proc_dointvec | |
5189 | }, | |
b800c3b9 HFS |
5190 | { |
5191 | .procname = "suppress_frag_ndisc", | |
5192 | .data = &ipv6_devconf.suppress_frag_ndisc, | |
5193 | .maxlen = sizeof(int), | |
5194 | .mode = 0644, | |
5195 | .proc_handler = proc_dointvec | |
5196 | }, | |
d9333196 BG |
5197 | { |
5198 | .procname = "accept_ra_from_local", | |
5199 | .data = &ipv6_devconf.accept_ra_from_local, | |
5200 | .maxlen = sizeof(int), | |
5201 | .mode = 0644, | |
5202 | .proc_handler = proc_dointvec, | |
5203 | }, | |
1da177e4 | 5204 | { |
f8572d8f | 5205 | /* sentinel */ |
1da177e4 LT |
5206 | } |
5207 | }, | |
1da177e4 LT |
5208 | }; |
5209 | ||
bff16c2f | 5210 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
f8572d8f | 5211 | struct inet6_dev *idev, struct ipv6_devconf *p) |
1da177e4 LT |
5212 | { |
5213 | int i; | |
1da177e4 | 5214 | struct addrconf_sysctl_table *t; |
6105e293 | 5215 | char path[sizeof("net/ipv6/conf/") + IFNAMSIZ]; |
1dab6222 | 5216 | |
af879cc7 | 5217 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 | 5218 | if (t == NULL) |
f68635e6 PE |
5219 | goto out; |
5220 | ||
bcdd553f | 5221 | for (i = 0; t->addrconf_vars[i].data; i++) { |
e21e8467 | 5222 | t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf; |
1da177e4 | 5223 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
bff16c2f | 5224 | t->addrconf_vars[i].extra2 = net; |
1da177e4 | 5225 | } |
1da177e4 | 5226 | |
6105e293 | 5227 | snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name); |
1da177e4 | 5228 | |
6105e293 | 5229 | t->sysctl_header = register_net_sysctl(net, path, t->addrconf_vars); |
1da177e4 | 5230 | if (t->sysctl_header == NULL) |
6105e293 | 5231 | goto free; |
f68635e6 PE |
5232 | |
5233 | p->sysctl = t; | |
95897312 | 5234 | return 0; |
1da177e4 | 5235 | |
f68635e6 | 5236 | free: |
1da177e4 | 5237 | kfree(t); |
f68635e6 | 5238 | out: |
95897312 | 5239 | return -ENOBUFS; |
1da177e4 LT |
5240 | } |
5241 | ||
408c4768 PE |
5242 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
5243 | { | |
5244 | struct addrconf_sysctl_table *t; | |
5245 | ||
5246 | if (p->sysctl == NULL) | |
5247 | return; | |
5248 | ||
5249 | t = p->sysctl; | |
5250 | p->sysctl = NULL; | |
ff538818 | 5251 | unregister_net_sysctl_table(t->sysctl_header); |
408c4768 PE |
5252 | kfree(t); |
5253 | } | |
5254 | ||
a317a2f1 | 5255 | static int addrconf_sysctl_register(struct inet6_dev *idev) |
f52295a9 | 5256 | { |
a317a2f1 WC |
5257 | int err; |
5258 | ||
5259 | if (!sysctl_dev_name_is_allowed(idev->dev->name)) | |
5260 | return -EINVAL; | |
5261 | ||
5262 | err = neigh_sysctl_register(idev->dev, idev->nd_parms, | |
5263 | &ndisc_ifinfo_sysctl_change); | |
5264 | if (err) | |
5265 | return err; | |
5266 | err = __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, | |
5267 | idev, &idev->cnf); | |
5268 | if (err) | |
5269 | neigh_sysctl_unregister(idev->nd_parms); | |
5270 | ||
5271 | return err; | |
f52295a9 PE |
5272 | } |
5273 | ||
408c4768 | 5274 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4 | 5275 | { |
408c4768 PE |
5276 | __addrconf_sysctl_unregister(&idev->cnf); |
5277 | neigh_sysctl_unregister(idev->nd_parms); | |
1da177e4 LT |
5278 | } |
5279 | ||
5280 | ||
5281 | #endif | |
5282 | ||
2c8c1e72 | 5283 | static int __net_init addrconf_init_net(struct net *net) |
e0da5a48 | 5284 | { |
a79ca223 | 5285 | int err = -ENOMEM; |
e0da5a48 PE |
5286 | struct ipv6_devconf *all, *dflt; |
5287 | ||
a79ca223 HZ |
5288 | all = kmemdup(&ipv6_devconf, sizeof(ipv6_devconf), GFP_KERNEL); |
5289 | if (all == NULL) | |
5290 | goto err_alloc_all; | |
e0da5a48 | 5291 | |
a79ca223 HZ |
5292 | dflt = kmemdup(&ipv6_devconf_dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); |
5293 | if (dflt == NULL) | |
5294 | goto err_alloc_dflt; | |
e0da5a48 | 5295 | |
a79ca223 HZ |
5296 | /* these will be inherited by all namespaces */ |
5297 | dflt->autoconf = ipv6_defaults.autoconf; | |
5298 | dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; | |
e0da5a48 PE |
5299 | |
5300 | net->ipv6.devconf_all = all; | |
5301 | net->ipv6.devconf_dflt = dflt; | |
5302 | ||
5303 | #ifdef CONFIG_SYSCTL | |
f8572d8f | 5304 | err = __addrconf_sysctl_register(net, "all", NULL, all); |
e0da5a48 PE |
5305 | if (err < 0) |
5306 | goto err_reg_all; | |
5307 | ||
f8572d8f | 5308 | err = __addrconf_sysctl_register(net, "default", NULL, dflt); |
e0da5a48 PE |
5309 | if (err < 0) |
5310 | goto err_reg_dflt; | |
5311 | #endif | |
5312 | return 0; | |
5313 | ||
5314 | #ifdef CONFIG_SYSCTL | |
5315 | err_reg_dflt: | |
5316 | __addrconf_sysctl_unregister(all); | |
5317 | err_reg_all: | |
5318 | kfree(dflt); | |
5319 | #endif | |
5320 | err_alloc_dflt: | |
5321 | kfree(all); | |
5322 | err_alloc_all: | |
5323 | return err; | |
5324 | } | |
5325 | ||
2c8c1e72 | 5326 | static void __net_exit addrconf_exit_net(struct net *net) |
e0da5a48 PE |
5327 | { |
5328 | #ifdef CONFIG_SYSCTL | |
5329 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); | |
5330 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); | |
5331 | #endif | |
09ad9bc7 | 5332 | if (!net_eq(net, &init_net)) { |
e0da5a48 PE |
5333 | kfree(net->ipv6.devconf_dflt); |
5334 | kfree(net->ipv6.devconf_all); | |
5335 | } | |
5336 | } | |
5337 | ||
5338 | static struct pernet_operations addrconf_ops = { | |
5339 | .init = addrconf_init_net, | |
5340 | .exit = addrconf_exit_net, | |
5341 | }; | |
5342 | ||
b382b191 TG |
5343 | static struct rtnl_af_ops inet6_ops = { |
5344 | .family = AF_INET6, | |
5345 | .fill_link_af = inet6_fill_link_af, | |
5346 | .get_link_af_size = inet6_get_link_af_size, | |
f53adae4 | 5347 | .set_link_af = inet6_set_link_af, |
b382b191 TG |
5348 | }; |
5349 | ||
1da177e4 LT |
5350 | /* |
5351 | * Init / cleanup code | |
5352 | */ | |
5353 | ||
5354 | int __init addrconf_init(void) | |
5355 | { | |
a317a2f1 | 5356 | struct inet6_dev *idev; |
c2e21293 | 5357 | int i, err; |
2a8cc6c8 | 5358 | |
e21e8467 SH |
5359 | err = ipv6_addr_label_init(); |
5360 | if (err < 0) { | |
f3213831 JP |
5361 | pr_crit("%s: cannot initialize default policy table: %d\n", |
5362 | __func__, err); | |
2cc6d2bf | 5363 | goto out; |
2a8cc6c8 | 5364 | } |
1da177e4 | 5365 | |
2cc6d2bf NH |
5366 | err = register_pernet_subsys(&addrconf_ops); |
5367 | if (err < 0) | |
5368 | goto out_addrlabel; | |
e0da5a48 | 5369 | |
c15b1cca HFS |
5370 | addrconf_wq = create_workqueue("ipv6_addrconf"); |
5371 | if (!addrconf_wq) { | |
5372 | err = -ENOMEM; | |
5373 | goto out_nowq; | |
5374 | } | |
5375 | ||
1da177e4 LT |
5376 | /* The addrconf netdev notifier requires that loopback_dev |
5377 | * has it's ipv6 private information allocated and setup | |
5378 | * before it can bring up and give link-local addresses | |
5379 | * to other devices which are up. | |
5380 | * | |
5381 | * Unfortunately, loopback_dev is not necessarily the first | |
5382 | * entry in the global dev_base list of net devices. In fact, | |
5383 | * it is likely to be the very last entry on that list. | |
5384 | * So this causes the notifier registry below to try and | |
5385 | * give link-local addresses to all devices besides loopback_dev | |
5386 | * first, then loopback_dev, which cases all the non-loopback_dev | |
5387 | * devices to fail to get a link-local address. | |
5388 | * | |
5389 | * So, as a temporary fix, allocate the ipv6 structure for | |
5390 | * loopback_dev first by hand. | |
5391 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
5392 | * device and it being up should be removed. | |
5393 | */ | |
5394 | rtnl_lock(); | |
a317a2f1 | 5395 | idev = ipv6_add_dev(init_net.loopback_dev); |
1da177e4 | 5396 | rtnl_unlock(); |
a317a2f1 WC |
5397 | if (IS_ERR(idev)) { |
5398 | err = PTR_ERR(idev); | |
e0da5a48 | 5399 | goto errlo; |
a317a2f1 | 5400 | } |
1da177e4 | 5401 | |
c2e21293 | 5402 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
5403 | INIT_HLIST_HEAD(&inet6_addr_lst[i]); | |
5404 | ||
1da177e4 LT |
5405 | register_netdevice_notifier(&ipv6_dev_notf); |
5406 | ||
c15b1cca | 5407 | addrconf_verify(); |
c127ea2c | 5408 | |
3678a9d8 | 5409 | rtnl_af_register(&inet6_ops); |
b382b191 | 5410 | |
c7ac8679 GR |
5411 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo, |
5412 | NULL); | |
c127ea2c TG |
5413 | if (err < 0) |
5414 | goto errout; | |
5415 | ||
5416 | /* Only the first call to __rtnl_register can fail */ | |
c7ac8679 GR |
5417 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL); |
5418 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL); | |
5419 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, | |
5420 | inet6_dump_ifaddr, NULL); | |
5421 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, | |
5422 | inet6_dump_ifmcaddr, NULL); | |
5423 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, | |
5424 | inet6_dump_ifacaddr, NULL); | |
76f8f6cb | 5425 | __rtnl_register(PF_INET6, RTM_GETNETCONF, inet6_netconf_get_devconf, |
7a674200 | 5426 | inet6_netconf_dump_devconf, NULL); |
c127ea2c | 5427 | |
2a8cc6c8 YH |
5428 | ipv6_addr_label_rtnl_register(); |
5429 | ||
1da177e4 | 5430 | return 0; |
c127ea2c | 5431 | errout: |
b382b191 | 5432 | rtnl_af_unregister(&inet6_ops); |
c127ea2c | 5433 | unregister_netdevice_notifier(&ipv6_dev_notf); |
e0da5a48 | 5434 | errlo: |
c15b1cca HFS |
5435 | destroy_workqueue(addrconf_wq); |
5436 | out_nowq: | |
e0da5a48 | 5437 | unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf NH |
5438 | out_addrlabel: |
5439 | ipv6_addr_label_cleanup(); | |
5440 | out: | |
c127ea2c | 5441 | return err; |
1da177e4 LT |
5442 | } |
5443 | ||
09f7709f | 5444 | void addrconf_cleanup(void) |
1da177e4 | 5445 | { |
176c39af | 5446 | struct net_device *dev; |
1da177e4 LT |
5447 | int i; |
5448 | ||
5449 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 | 5450 | unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf | 5451 | ipv6_addr_label_cleanup(); |
1da177e4 LT |
5452 | |
5453 | rtnl_lock(); | |
5454 | ||
b382b191 TG |
5455 | __rtnl_af_unregister(&inet6_ops); |
5456 | ||
176c39af DL |
5457 | /* clean dev list */ |
5458 | for_each_netdev(&init_net, dev) { | |
5459 | if (__in6_dev_get(dev) == NULL) | |
5460 | continue; | |
5461 | addrconf_ifdown(dev, 1); | |
5462 | } | |
5463 | addrconf_ifdown(init_net.loopback_dev, 2); | |
5464 | ||
1da177e4 LT |
5465 | /* |
5466 | * Check hash table. | |
5467 | */ | |
5c578aed | 5468 | spin_lock_bh(&addrconf_hash_lock); |
c2e21293 | 5469 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
5470 | WARN_ON(!hlist_empty(&inet6_addr_lst[i])); | |
5c578aed | 5471 | spin_unlock_bh(&addrconf_hash_lock); |
c15b1cca | 5472 | cancel_delayed_work(&addr_chk_work); |
1da177e4 | 5473 | rtnl_unlock(); |
c15b1cca HFS |
5474 | |
5475 | destroy_workqueue(addrconf_wq); | |
1da177e4 | 5476 | } |