Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * IPv6 Address [auto]configuration | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> |
8 | * | |
1da177e4 LT |
9 | * This program is free software; you can redistribute it and/or |
10 | * modify it under the terms of the GNU General Public License | |
11 | * as published by the Free Software Foundation; either version | |
12 | * 2 of the License, or (at your option) any later version. | |
13 | */ | |
14 | ||
15 | /* | |
16 | * Changes: | |
17 | * | |
18 | * Janos Farkas : delete timer on ifdown | |
19 | * <chexum@bankinf.banki.hu> | |
20 | * Andi Kleen : kill double kfree on module | |
21 | * unload. | |
22 | * Maciej W. Rozycki : FDDI support | |
23 | * sekiya@USAGI : Don't send too many RS | |
24 | * packets. | |
25 | * yoshfuji@USAGI : Fixed interval between DAD | |
26 | * packets. | |
27 | * YOSHIFUJI Hideaki @USAGI : improved accuracy of | |
28 | * address validation timer. | |
29 | * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041) | |
30 | * support. | |
31 | * Yuji SEKIYA @USAGI : Don't assign a same IPv6 | |
32 | * address on a same interface. | |
33 | * YOSHIFUJI Hideaki @USAGI : ARCnet support | |
34 | * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to | |
35 | * seq_file. | |
b1cacb68 YH |
36 | * YOSHIFUJI Hideaki @USAGI : improved source address |
37 | * selection; consider scope, | |
38 | * status etc. | |
1da177e4 LT |
39 | */ |
40 | ||
f3213831 JP |
41 | #define pr_fmt(fmt) "IPv6: " fmt |
42 | ||
1da177e4 LT |
43 | #include <linux/errno.h> |
44 | #include <linux/types.h> | |
a0bffffc | 45 | #include <linux/kernel.h> |
1da177e4 LT |
46 | #include <linux/socket.h> |
47 | #include <linux/sockios.h> | |
1da177e4 | 48 | #include <linux/net.h> |
3d1bec99 | 49 | #include <linux/inet.h> |
1da177e4 LT |
50 | #include <linux/in6.h> |
51 | #include <linux/netdevice.h> | |
1823730f | 52 | #include <linux/if_addr.h> |
1da177e4 LT |
53 | #include <linux/if_arp.h> |
54 | #include <linux/if_arcnet.h> | |
55 | #include <linux/if_infiniband.h> | |
56 | #include <linux/route.h> | |
57 | #include <linux/inetdevice.h> | |
58 | #include <linux/init.h> | |
5a0e3ad6 | 59 | #include <linux/slab.h> |
1da177e4 LT |
60 | #ifdef CONFIG_SYSCTL |
61 | #include <linux/sysctl.h> | |
62 | #endif | |
4fc268d2 | 63 | #include <linux/capability.h> |
1da177e4 LT |
64 | #include <linux/delay.h> |
65 | #include <linux/notifier.h> | |
543537bd | 66 | #include <linux/string.h> |
ddbe5032 | 67 | #include <linux/hash.h> |
1da177e4 | 68 | |
457c4cbc | 69 | #include <net/net_namespace.h> |
1da177e4 LT |
70 | #include <net/sock.h> |
71 | #include <net/snmp.h> | |
72 | ||
06a4c1c5 | 73 | #include <net/af_ieee802154.h> |
cb6bf355 | 74 | #include <net/firewire.h> |
1da177e4 LT |
75 | #include <net/ipv6.h> |
76 | #include <net/protocol.h> | |
77 | #include <net/ndisc.h> | |
78 | #include <net/ip6_route.h> | |
79 | #include <net/addrconf.h> | |
80 | #include <net/tcp.h> | |
81 | #include <net/ip.h> | |
5d620266 | 82 | #include <net/netlink.h> |
f24e3d65 | 83 | #include <net/pkt_sched.h> |
ca254490 | 84 | #include <net/l3mdev.h> |
1da177e4 LT |
85 | #include <linux/if_tunnel.h> |
86 | #include <linux/rtnetlink.h> | |
f3a1bfb1 | 87 | #include <linux/netconf.h> |
1da177e4 | 88 | #include <linux/random.h> |
e21e8467 | 89 | #include <linux/uaccess.h> |
7f7d9a6b | 90 | #include <asm/unaligned.h> |
1da177e4 LT |
91 | |
92 | #include <linux/proc_fs.h> | |
93 | #include <linux/seq_file.h> | |
bc3b2d7f | 94 | #include <linux/export.h> |
1da177e4 LT |
95 | |
96 | /* Set to 3 to get tracing... */ | |
97 | #define ACONF_DEBUG 2 | |
98 | ||
99 | #if ACONF_DEBUG >= 3 | |
ba3542e1 | 100 | #define ADBG(fmt, ...) printk(fmt, ##__VA_ARGS__) |
1da177e4 | 101 | #else |
ba3542e1 | 102 | #define ADBG(fmt, ...) do { if (0) printk(fmt, ##__VA_ARGS__); } while (0) |
1da177e4 LT |
103 | #endif |
104 | ||
105 | #define INFINITY_LIFE_TIME 0xFFFFFFFF | |
18a31e1e | 106 | |
3d1bec99 HFS |
107 | #define IPV6_MAX_STRLEN \ |
108 | sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255") | |
109 | ||
18a31e1e TG |
110 | static inline u32 cstamp_delta(unsigned long cstamp) |
111 | { | |
112 | return (cstamp - INITIAL_JIFFIES) * 100UL / HZ; | |
113 | } | |
1da177e4 LT |
114 | |
115 | #ifdef CONFIG_SYSCTL | |
a317a2f1 | 116 | static int addrconf_sysctl_register(struct inet6_dev *idev); |
408c4768 PE |
117 | static void addrconf_sysctl_unregister(struct inet6_dev *idev); |
118 | #else | |
a317a2f1 | 119 | static inline int addrconf_sysctl_register(struct inet6_dev *idev) |
408c4768 | 120 | { |
a317a2f1 | 121 | return 0; |
408c4768 PE |
122 | } |
123 | ||
124 | static inline void addrconf_sysctl_unregister(struct inet6_dev *idev) | |
125 | { | |
126 | } | |
1da177e4 LT |
127 | #endif |
128 | ||
eb7e0575 SD |
129 | static void __ipv6_regen_rndid(struct inet6_dev *idev); |
130 | static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); | |
1da177e4 | 131 | static void ipv6_regen_rndid(unsigned long data); |
1da177e4 | 132 | |
1b34be74 | 133 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev); |
1da177e4 | 134 | static int ipv6_count_addresses(struct inet6_dev *idev); |
622c81d5 HFS |
135 | static int ipv6_generate_stable_address(struct in6_addr *addr, |
136 | u8 dad_count, | |
137 | const struct inet6_dev *idev); | |
1da177e4 LT |
138 | |
139 | /* | |
140 | * Configured unicast address hash table | |
141 | */ | |
c2e21293 | 142 | static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE]; |
5c578aed | 143 | static DEFINE_SPINLOCK(addrconf_hash_lock); |
1da177e4 | 144 | |
c15b1cca HFS |
145 | static void addrconf_verify(void); |
146 | static void addrconf_verify_rtnl(void); | |
147 | static void addrconf_verify_work(struct work_struct *); | |
1da177e4 | 148 | |
c15b1cca HFS |
149 | static struct workqueue_struct *addrconf_wq; |
150 | static DECLARE_DELAYED_WORK(addr_chk_work, addrconf_verify_work); | |
1da177e4 LT |
151 | |
152 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
153 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
154 | ||
93d9b7d7 JP |
155 | static void addrconf_type_change(struct net_device *dev, |
156 | unsigned long event); | |
1da177e4 LT |
157 | static int addrconf_ifdown(struct net_device *dev, int how); |
158 | ||
21caa662 RK |
159 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, |
160 | int plen, | |
161 | const struct net_device *dev, | |
162 | u32 flags, u32 noflags); | |
163 | ||
cf22f9a2 | 164 | static void addrconf_dad_start(struct inet6_ifaddr *ifp); |
c15b1cca | 165 | static void addrconf_dad_work(struct work_struct *w); |
1da177e4 | 166 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); |
c5e33bdd | 167 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
168 | static void addrconf_rs_timer(unsigned long data); |
169 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
170 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
171 | ||
1ab1457c | 172 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 | 173 | struct prefix_info *pinfo); |
3e81c6da DM |
174 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
175 | struct net_device *dev); | |
1da177e4 | 176 | |
888c848e | 177 | static struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
178 | .forwarding = 0, |
179 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
180 | .mtu6 = IPV6_MIN_MTU, | |
181 | .accept_ra = 1, | |
182 | .accept_redirects = 1, | |
183 | .autoconf = 1, | |
184 | .force_mld_version = 0, | |
fc4eba58 HFS |
185 | .mldv1_unsolicited_report_interval = 10 * HZ, |
186 | .mldv2_unsolicited_report_interval = HZ, | |
1da177e4 LT |
187 | .dad_transmits = 1, |
188 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
189 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
190 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
67ba4152 | 191 | .use_tempaddr = 0, |
1da177e4 LT |
192 | .temp_valid_lft = TEMP_VALID_LIFETIME, |
193 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
194 | .regen_max_retry = REGEN_MAX_RETRY, | |
195 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
1da177e4 | 196 | .max_addresses = IPV6_MAX_ADDRESSES, |
65f5c7c1 | 197 | .accept_ra_defrtr = 1, |
d9333196 | 198 | .accept_ra_from_local = 0, |
8013d1d7 | 199 | .accept_ra_min_hop_limit= 1, |
c4fd30eb | 200 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
201 | #ifdef CONFIG_IPV6_ROUTER_PREF |
202 | .accept_ra_rtr_pref = 1, | |
52e16356 | 203 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
204 | #ifdef CONFIG_IPV6_ROUTE_INFO |
205 | .accept_ra_rt_info_max_plen = 0, | |
206 | #endif | |
930d6ff2 | 207 | #endif |
fbea49e1 | 208 | .proxy_ndp = 0, |
0bcbc926 | 209 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 210 | .disable_ipv6 = 0, |
1b34be74 | 211 | .accept_dad = 1, |
b800c3b9 | 212 | .suppress_frag_ndisc = 1, |
c2943f14 | 213 | .accept_ra_mtu = 1, |
3d1bec99 HFS |
214 | .stable_secret = { |
215 | .initialized = false, | |
3985e8a3 EK |
216 | }, |
217 | .use_oif_addrs_only = 0, | |
35103d11 | 218 | .ignore_routes_with_linkdown = 0, |
1da177e4 LT |
219 | }; |
220 | ||
ab32ea5d | 221 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
222 | .forwarding = 0, |
223 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
224 | .mtu6 = IPV6_MIN_MTU, | |
225 | .accept_ra = 1, | |
226 | .accept_redirects = 1, | |
227 | .autoconf = 1, | |
fc4eba58 HFS |
228 | .force_mld_version = 0, |
229 | .mldv1_unsolicited_report_interval = 10 * HZ, | |
230 | .mldv2_unsolicited_report_interval = HZ, | |
1da177e4 LT |
231 | .dad_transmits = 1, |
232 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
233 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
234 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
1da177e4 LT |
235 | .use_tempaddr = 0, |
236 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
237 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
238 | .regen_max_retry = REGEN_MAX_RETRY, | |
239 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
1da177e4 | 240 | .max_addresses = IPV6_MAX_ADDRESSES, |
65f5c7c1 | 241 | .accept_ra_defrtr = 1, |
d9333196 | 242 | .accept_ra_from_local = 0, |
8013d1d7 | 243 | .accept_ra_min_hop_limit= 1, |
c4fd30eb | 244 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
245 | #ifdef CONFIG_IPV6_ROUTER_PREF |
246 | .accept_ra_rtr_pref = 1, | |
52e16356 | 247 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
248 | #ifdef CONFIG_IPV6_ROUTE_INFO |
249 | .accept_ra_rt_info_max_plen = 0, | |
250 | #endif | |
930d6ff2 | 251 | #endif |
fbea49e1 | 252 | .proxy_ndp = 0, |
0bcbc926 | 253 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 254 | .disable_ipv6 = 0, |
1b34be74 | 255 | .accept_dad = 1, |
b800c3b9 | 256 | .suppress_frag_ndisc = 1, |
c2943f14 | 257 | .accept_ra_mtu = 1, |
3d1bec99 HFS |
258 | .stable_secret = { |
259 | .initialized = false, | |
260 | }, | |
3985e8a3 | 261 | .use_oif_addrs_only = 0, |
35103d11 | 262 | .ignore_routes_with_linkdown = 0, |
1da177e4 LT |
263 | }; |
264 | ||
f24e3d65 | 265 | /* Check if a valid qdisc is available */ |
05297949 | 266 | static inline bool addrconf_qdisc_ok(const struct net_device *dev) |
f24e3d65 | 267 | { |
05297949 | 268 | return !qdisc_tx_is_noop(dev); |
f24e3d65 MC |
269 | } |
270 | ||
b7b1bfce | 271 | static void addrconf_del_rs_timer(struct inet6_dev *idev) |
1da177e4 | 272 | { |
b7b1bfce HFS |
273 | if (del_timer(&idev->rs_timer)) |
274 | __in6_dev_put(idev); | |
275 | } | |
276 | ||
c15b1cca | 277 | static void addrconf_del_dad_work(struct inet6_ifaddr *ifp) |
b7b1bfce | 278 | { |
c15b1cca | 279 | if (cancel_delayed_work(&ifp->dad_work)) |
1da177e4 LT |
280 | __in6_ifa_put(ifp); |
281 | } | |
282 | ||
b7b1bfce HFS |
283 | static void addrconf_mod_rs_timer(struct inet6_dev *idev, |
284 | unsigned long when) | |
285 | { | |
286 | if (!timer_pending(&idev->rs_timer)) | |
287 | in6_dev_hold(idev); | |
288 | mod_timer(&idev->rs_timer, jiffies + when); | |
289 | } | |
1da177e4 | 290 | |
c15b1cca HFS |
291 | static void addrconf_mod_dad_work(struct inet6_ifaddr *ifp, |
292 | unsigned long delay) | |
1da177e4 | 293 | { |
c15b1cca | 294 | if (!delayed_work_pending(&ifp->dad_work)) |
1da177e4 | 295 | in6_ifa_hold(ifp); |
c15b1cca | 296 | mod_delayed_work(addrconf_wq, &ifp->dad_work, delay); |
1da177e4 LT |
297 | } |
298 | ||
7f7d9a6b HX |
299 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
300 | { | |
827da44c JS |
301 | int i; |
302 | ||
698365fa WC |
303 | idev->stats.ipv6 = alloc_percpu(struct ipstats_mib); |
304 | if (!idev->stats.ipv6) | |
7f7d9a6b | 305 | goto err_ip; |
827da44c JS |
306 | |
307 | for_each_possible_cpu(i) { | |
308 | struct ipstats_mib *addrconf_stats; | |
698365fa | 309 | addrconf_stats = per_cpu_ptr(idev->stats.ipv6, i); |
827da44c | 310 | u64_stats_init(&addrconf_stats->syncp); |
827da44c JS |
311 | } |
312 | ||
313 | ||
be281e55 ED |
314 | idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device), |
315 | GFP_KERNEL); | |
316 | if (!idev->stats.icmpv6dev) | |
7f7d9a6b | 317 | goto err_icmp; |
be281e55 ED |
318 | idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device), |
319 | GFP_KERNEL); | |
320 | if (!idev->stats.icmpv6msgdev) | |
14878f75 | 321 | goto err_icmpmsg; |
7f7d9a6b HX |
322 | |
323 | return 0; | |
324 | ||
14878f75 | 325 | err_icmpmsg: |
be281e55 | 326 | kfree(idev->stats.icmpv6dev); |
7f7d9a6b | 327 | err_icmp: |
698365fa | 328 | free_percpu(idev->stats.ipv6); |
7f7d9a6b | 329 | err_ip: |
aaf70ec7 | 330 | return -ENOMEM; |
7f7d9a6b HX |
331 | } |
332 | ||
8e5e8f30 | 333 | static struct inet6_dev *ipv6_add_dev(struct net_device *dev) |
1da177e4 LT |
334 | { |
335 | struct inet6_dev *ndev; | |
a317a2f1 | 336 | int err = -ENOMEM; |
1da177e4 LT |
337 | |
338 | ASSERT_RTNL(); | |
339 | ||
340 | if (dev->mtu < IPV6_MIN_MTU) | |
a317a2f1 | 341 | return ERR_PTR(-EINVAL); |
1da177e4 | 342 | |
1ab1457c | 343 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
63159f29 | 344 | if (!ndev) |
a317a2f1 | 345 | return ERR_PTR(err); |
322f74a4 IO |
346 | |
347 | rwlock_init(&ndev->lock); | |
348 | ndev->dev = dev; | |
502a2ffd | 349 | INIT_LIST_HEAD(&ndev->addr_list); |
b7b1bfce HFS |
350 | setup_timer(&ndev->rs_timer, addrconf_rs_timer, |
351 | (unsigned long)ndev); | |
c346dca1 | 352 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
322f74a4 IO |
353 | ndev->cnf.mtu6 = dev->mtu; |
354 | ndev->cnf.sysctl = NULL; | |
355 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
63159f29 | 356 | if (!ndev->nd_parms) { |
322f74a4 | 357 | kfree(ndev); |
a317a2f1 | 358 | return ERR_PTR(err); |
322f74a4 | 359 | } |
0187bdfb BH |
360 | if (ndev->cnf.forwarding) |
361 | dev_disable_lro(dev); | |
322f74a4 IO |
362 | /* We refer to the device */ |
363 | dev_hold(dev); | |
1da177e4 | 364 | |
322f74a4 | 365 | if (snmp6_alloc_dev(ndev) < 0) { |
ba3542e1 | 366 | ADBG(KERN_WARNING |
f3213831 | 367 | "%s: cannot allocate memory for statistics; dev=%s.\n", |
ba3542e1 | 368 | __func__, dev->name); |
322f74a4 | 369 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
8603e33d RL |
370 | dev_put(dev); |
371 | kfree(ndev); | |
a317a2f1 | 372 | return ERR_PTR(err); |
322f74a4 | 373 | } |
1da177e4 | 374 | |
322f74a4 | 375 | if (snmp6_register_dev(ndev) < 0) { |
ba3542e1 | 376 | ADBG(KERN_WARNING |
f3213831 | 377 | "%s: cannot create /proc/net/dev_snmp6/%s\n", |
ba3542e1 | 378 | __func__, dev->name); |
a317a2f1 | 379 | goto err_release; |
322f74a4 IO |
380 | } |
381 | ||
382 | /* One reference from device. We must do this before | |
383 | * we invoke __ipv6_regen_rndid(). | |
384 | */ | |
385 | in6_dev_hold(ndev); | |
1da177e4 | 386 | |
1b34be74 YH |
387 | if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) |
388 | ndev->cnf.accept_dad = -1; | |
389 | ||
07a93626 | 390 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
b077d7ab | 391 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { |
f3213831 | 392 | pr_info("%s: Disabled Multicast RS\n", dev->name); |
b077d7ab YH |
393 | ndev->cnf.rtr_solicits = 0; |
394 | } | |
395 | #endif | |
396 | ||
372e6c8f | 397 | INIT_LIST_HEAD(&ndev->tempaddr_list); |
b24b8a24 | 398 | setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
322f74a4 IO |
399 | if ((dev->flags&IFF_LOOPBACK) || |
400 | dev->type == ARPHRD_TUNNEL || | |
9625ed72 | 401 | dev->type == ARPHRD_TUNNEL6 || |
0be669bb | 402 | dev->type == ARPHRD_SIT || |
0be669bb | 403 | dev->type == ARPHRD_NONE) { |
322f74a4 IO |
404 | ndev->cnf.use_tempaddr = -1; |
405 | } else { | |
406 | in6_dev_hold(ndev); | |
407 | ipv6_regen_rndid((unsigned long) ndev); | |
408 | } | |
5d9efa7e | 409 | |
914faa14 | 410 | ndev->token = in6addr_any; |
1da177e4 | 411 | |
f24e3d65 | 412 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
53aadcc9 HX |
413 | ndev->if_flags |= IF_READY; |
414 | ||
322f74a4 IO |
415 | ipv6_mc_init_dev(ndev); |
416 | ndev->tstamp = jiffies; | |
a317a2f1 WC |
417 | err = addrconf_sysctl_register(ndev); |
418 | if (err) { | |
419 | ipv6_mc_destroy_dev(ndev); | |
420 | del_timer(&ndev->regen_timer); | |
421 | goto err_release; | |
422 | } | |
30c4cf57 | 423 | /* protected by rtnl_lock */ |
cf778b00 | 424 | rcu_assign_pointer(dev->ip6_ptr, ndev); |
d88ae4cc | 425 | |
2c5e8933 HFS |
426 | /* Join interface-local all-node multicast group */ |
427 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allnodes); | |
428 | ||
d88ae4cc | 429 | /* Join all-node multicast group */ |
f3ee4010 | 430 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
d88ae4cc | 431 | |
d6ddef9e | 432 | /* Join all-router multicast group if forwarding is set */ |
8b2aaede | 433 | if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST)) |
d6ddef9e LW |
434 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
435 | ||
1da177e4 | 436 | return ndev; |
a317a2f1 WC |
437 | |
438 | err_release: | |
439 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
440 | ndev->dead = 1; | |
441 | in6_dev_finish_destroy(ndev); | |
442 | return ERR_PTR(err); | |
1da177e4 LT |
443 | } |
444 | ||
8e5e8f30 | 445 | static struct inet6_dev *ipv6_find_idev(struct net_device *dev) |
1da177e4 LT |
446 | { |
447 | struct inet6_dev *idev; | |
448 | ||
449 | ASSERT_RTNL(); | |
450 | ||
e21e8467 SH |
451 | idev = __in6_dev_get(dev); |
452 | if (!idev) { | |
453 | idev = ipv6_add_dev(dev); | |
a317a2f1 | 454 | if (IS_ERR(idev)) |
1da177e4 LT |
455 | return NULL; |
456 | } | |
c5e33bdd | 457 | |
1da177e4 LT |
458 | if (dev->flags&IFF_UP) |
459 | ipv6_mc_up(idev); | |
460 | return idev; | |
461 | } | |
462 | ||
f3a1bfb1 ND |
463 | static int inet6_netconf_msgsize_devconf(int type) |
464 | { | |
465 | int size = NLMSG_ALIGN(sizeof(struct netconfmsg)) | |
466 | + nla_total_size(4); /* NETCONFA_IFINDEX */ | |
467 | ||
76f8f6cb ND |
468 | /* type -1 is used for ALL */ |
469 | if (type == -1 || type == NETCONFA_FORWARDING) | |
f3a1bfb1 | 470 | size += nla_total_size(4); |
b1afce95 | 471 | #ifdef CONFIG_IPV6_MROUTE |
d67b8c61 ND |
472 | if (type == -1 || type == NETCONFA_MC_FORWARDING) |
473 | size += nla_total_size(4); | |
b1afce95 | 474 | #endif |
c92d5491 | 475 | if (type == -1 || type == NETCONFA_PROXY_NEIGH) |
476 | size += nla_total_size(4); | |
f3a1bfb1 | 477 | |
35103d11 AG |
478 | if (type == -1 || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) |
479 | size += nla_total_size(4); | |
480 | ||
f3a1bfb1 ND |
481 | return size; |
482 | } | |
483 | ||
484 | static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex, | |
485 | struct ipv6_devconf *devconf, u32 portid, | |
486 | u32 seq, int event, unsigned int flags, | |
487 | int type) | |
488 | { | |
489 | struct nlmsghdr *nlh; | |
490 | struct netconfmsg *ncm; | |
491 | ||
492 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg), | |
493 | flags); | |
63159f29 | 494 | if (!nlh) |
f3a1bfb1 ND |
495 | return -EMSGSIZE; |
496 | ||
497 | ncm = nlmsg_data(nlh); | |
498 | ncm->ncm_family = AF_INET6; | |
499 | ||
500 | if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0) | |
501 | goto nla_put_failure; | |
502 | ||
76f8f6cb ND |
503 | /* type -1 is used for ALL */ |
504 | if ((type == -1 || type == NETCONFA_FORWARDING) && | |
f3a1bfb1 ND |
505 | nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0) |
506 | goto nla_put_failure; | |
b1afce95 | 507 | #ifdef CONFIG_IPV6_MROUTE |
d67b8c61 ND |
508 | if ((type == -1 || type == NETCONFA_MC_FORWARDING) && |
509 | nla_put_s32(skb, NETCONFA_MC_FORWARDING, | |
510 | devconf->mc_forwarding) < 0) | |
511 | goto nla_put_failure; | |
b1afce95 | 512 | #endif |
c92d5491 | 513 | if ((type == -1 || type == NETCONFA_PROXY_NEIGH) && |
514 | nla_put_s32(skb, NETCONFA_PROXY_NEIGH, devconf->proxy_ndp) < 0) | |
515 | goto nla_put_failure; | |
516 | ||
35103d11 AG |
517 | if ((type == -1 || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) && |
518 | nla_put_s32(skb, NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, | |
519 | devconf->ignore_routes_with_linkdown) < 0) | |
520 | goto nla_put_failure; | |
521 | ||
053c095a JB |
522 | nlmsg_end(skb, nlh); |
523 | return 0; | |
f3a1bfb1 ND |
524 | |
525 | nla_put_failure: | |
526 | nlmsg_cancel(skb, nlh); | |
527 | return -EMSGSIZE; | |
528 | } | |
529 | ||
d67b8c61 ND |
530 | void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex, |
531 | struct ipv6_devconf *devconf) | |
f3a1bfb1 ND |
532 | { |
533 | struct sk_buff *skb; | |
534 | int err = -ENOBUFS; | |
535 | ||
536 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(type), GFP_ATOMIC); | |
63159f29 | 537 | if (!skb) |
f3a1bfb1 ND |
538 | goto errout; |
539 | ||
540 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, 0, 0, | |
541 | RTM_NEWNETCONF, 0, type); | |
542 | if (err < 0) { | |
543 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
544 | WARN_ON(err == -EMSGSIZE); | |
545 | kfree_skb(skb); | |
546 | goto errout; | |
547 | } | |
548 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_NETCONF, NULL, GFP_ATOMIC); | |
549 | return; | |
550 | errout: | |
bd779028 | 551 | rtnl_set_sk_err(net, RTNLGRP_IPV6_NETCONF, err); |
f3a1bfb1 ND |
552 | } |
553 | ||
76f8f6cb ND |
554 | static const struct nla_policy devconf_ipv6_policy[NETCONFA_MAX+1] = { |
555 | [NETCONFA_IFINDEX] = { .len = sizeof(int) }, | |
556 | [NETCONFA_FORWARDING] = { .len = sizeof(int) }, | |
c92d5491 | 557 | [NETCONFA_PROXY_NEIGH] = { .len = sizeof(int) }, |
35103d11 | 558 | [NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN] = { .len = sizeof(int) }, |
76f8f6cb ND |
559 | }; |
560 | ||
561 | static int inet6_netconf_get_devconf(struct sk_buff *in_skb, | |
661d2967 | 562 | struct nlmsghdr *nlh) |
76f8f6cb ND |
563 | { |
564 | struct net *net = sock_net(in_skb->sk); | |
565 | struct nlattr *tb[NETCONFA_MAX+1]; | |
566 | struct netconfmsg *ncm; | |
567 | struct sk_buff *skb; | |
568 | struct ipv6_devconf *devconf; | |
569 | struct inet6_dev *in6_dev; | |
570 | struct net_device *dev; | |
571 | int ifindex; | |
572 | int err; | |
573 | ||
574 | err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX, | |
575 | devconf_ipv6_policy); | |
576 | if (err < 0) | |
577 | goto errout; | |
578 | ||
579 | err = EINVAL; | |
580 | if (!tb[NETCONFA_IFINDEX]) | |
581 | goto errout; | |
582 | ||
583 | ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]); | |
584 | switch (ifindex) { | |
585 | case NETCONFA_IFINDEX_ALL: | |
586 | devconf = net->ipv6.devconf_all; | |
587 | break; | |
588 | case NETCONFA_IFINDEX_DEFAULT: | |
589 | devconf = net->ipv6.devconf_dflt; | |
590 | break; | |
591 | default: | |
592 | dev = __dev_get_by_index(net, ifindex); | |
63159f29 | 593 | if (!dev) |
76f8f6cb ND |
594 | goto errout; |
595 | in6_dev = __in6_dev_get(dev); | |
63159f29 | 596 | if (!in6_dev) |
76f8f6cb ND |
597 | goto errout; |
598 | devconf = &in6_dev->cnf; | |
599 | break; | |
600 | } | |
601 | ||
602 | err = -ENOBUFS; | |
603 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(-1), GFP_ATOMIC); | |
63159f29 | 604 | if (!skb) |
76f8f6cb ND |
605 | goto errout; |
606 | ||
607 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, | |
608 | NETLINK_CB(in_skb).portid, | |
609 | nlh->nlmsg_seq, RTM_NEWNETCONF, 0, | |
610 | -1); | |
611 | if (err < 0) { | |
612 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
613 | WARN_ON(err == -EMSGSIZE); | |
614 | kfree_skb(skb); | |
615 | goto errout; | |
616 | } | |
617 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); | |
618 | errout: | |
619 | return err; | |
620 | } | |
621 | ||
7a674200 ND |
622 | static int inet6_netconf_dump_devconf(struct sk_buff *skb, |
623 | struct netlink_callback *cb) | |
624 | { | |
625 | struct net *net = sock_net(skb->sk); | |
626 | int h, s_h; | |
627 | int idx, s_idx; | |
628 | struct net_device *dev; | |
629 | struct inet6_dev *idev; | |
630 | struct hlist_head *head; | |
631 | ||
632 | s_h = cb->args[0]; | |
633 | s_idx = idx = cb->args[1]; | |
634 | ||
635 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
636 | idx = 0; | |
637 | head = &net->dev_index_head[h]; | |
638 | rcu_read_lock(); | |
63998ac2 ND |
639 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ |
640 | net->dev_base_seq; | |
7a674200 ND |
641 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
642 | if (idx < s_idx) | |
643 | goto cont; | |
644 | idev = __in6_dev_get(dev); | |
645 | if (!idev) | |
646 | goto cont; | |
647 | ||
648 | if (inet6_netconf_fill_devconf(skb, dev->ifindex, | |
649 | &idev->cnf, | |
650 | NETLINK_CB(cb->skb).portid, | |
651 | cb->nlh->nlmsg_seq, | |
652 | RTM_NEWNETCONF, | |
653 | NLM_F_MULTI, | |
053c095a | 654 | -1) < 0) { |
7a674200 ND |
655 | rcu_read_unlock(); |
656 | goto done; | |
657 | } | |
63998ac2 | 658 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
7a674200 ND |
659 | cont: |
660 | idx++; | |
661 | } | |
662 | rcu_read_unlock(); | |
663 | } | |
664 | if (h == NETDEV_HASHENTRIES) { | |
665 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL, | |
666 | net->ipv6.devconf_all, | |
667 | NETLINK_CB(cb->skb).portid, | |
668 | cb->nlh->nlmsg_seq, | |
669 | RTM_NEWNETCONF, NLM_F_MULTI, | |
053c095a | 670 | -1) < 0) |
7a674200 ND |
671 | goto done; |
672 | else | |
673 | h++; | |
674 | } | |
675 | if (h == NETDEV_HASHENTRIES + 1) { | |
676 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT, | |
677 | net->ipv6.devconf_dflt, | |
678 | NETLINK_CB(cb->skb).portid, | |
679 | cb->nlh->nlmsg_seq, | |
680 | RTM_NEWNETCONF, NLM_F_MULTI, | |
053c095a | 681 | -1) < 0) |
7a674200 ND |
682 | goto done; |
683 | else | |
684 | h++; | |
685 | } | |
686 | done: | |
687 | cb->args[0] = h; | |
688 | cb->args[1] = idx; | |
689 | ||
690 | return skb->len; | |
691 | } | |
692 | ||
1da177e4 LT |
693 | #ifdef CONFIG_SYSCTL |
694 | static void dev_forward_change(struct inet6_dev *idev) | |
695 | { | |
696 | struct net_device *dev; | |
697 | struct inet6_ifaddr *ifa; | |
1da177e4 LT |
698 | |
699 | if (!idev) | |
700 | return; | |
701 | dev = idev->dev; | |
0187bdfb BH |
702 | if (idev->cnf.forwarding) |
703 | dev_disable_lro(dev); | |
1a940835 | 704 | if (dev->flags & IFF_MULTICAST) { |
2c5e8933 | 705 | if (idev->cnf.forwarding) { |
f3ee4010 | 706 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
707 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allrouters); |
708 | ipv6_dev_mc_inc(dev, &in6addr_sitelocal_allrouters); | |
709 | } else { | |
f3ee4010 | 710 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
711 | ipv6_dev_mc_dec(dev, &in6addr_interfacelocal_allrouters); |
712 | ipv6_dev_mc_dec(dev, &in6addr_sitelocal_allrouters); | |
713 | } | |
1da177e4 | 714 | } |
502a2ffd | 715 | |
716 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
2c12a74c MW |
717 | if (ifa->flags&IFA_F_TENTATIVE) |
718 | continue; | |
1da177e4 LT |
719 | if (idev->cnf.forwarding) |
720 | addrconf_join_anycast(ifa); | |
721 | else | |
722 | addrconf_leave_anycast(ifa); | |
723 | } | |
f3a1bfb1 ND |
724 | inet6_netconf_notify_devconf(dev_net(dev), NETCONFA_FORWARDING, |
725 | dev->ifindex, &idev->cnf); | |
1da177e4 LT |
726 | } |
727 | ||
728 | ||
e186932b | 729 | static void addrconf_forward_change(struct net *net, __s32 newf) |
1da177e4 LT |
730 | { |
731 | struct net_device *dev; | |
732 | struct inet6_dev *idev; | |
733 | ||
4acd4945 | 734 | for_each_netdev(net, dev) { |
1da177e4 LT |
735 | idev = __in6_dev_get(dev); |
736 | if (idev) { | |
e186932b PE |
737 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
738 | idev->cnf.forwarding = newf; | |
1da177e4 LT |
739 | if (changed) |
740 | dev_forward_change(idev); | |
741 | } | |
1da177e4 | 742 | } |
1da177e4 | 743 | } |
c8fecf22 | 744 | |
013d97e9 | 745 | static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf) |
c8fecf22 | 746 | { |
bff16c2f | 747 | struct net *net; |
013d97e9 FR |
748 | int old; |
749 | ||
750 | if (!rtnl_trylock()) | |
751 | return restart_syscall(); | |
bff16c2f PE |
752 | |
753 | net = (struct net *)table->extra2; | |
013d97e9 FR |
754 | old = *p; |
755 | *p = newf; | |
b325fddb | 756 | |
013d97e9 | 757 | if (p == &net->ipv6.devconf_dflt->forwarding) { |
f3a1bfb1 ND |
758 | if ((!newf) ^ (!old)) |
759 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
760 | NETCONFA_IFINDEX_DEFAULT, | |
761 | net->ipv6.devconf_dflt); | |
013d97e9 FR |
762 | rtnl_unlock(); |
763 | return 0; | |
88af182e | 764 | } |
c8fecf22 | 765 | |
e186932b | 766 | if (p == &net->ipv6.devconf_all->forwarding) { |
e186932b PE |
767 | net->ipv6.devconf_dflt->forwarding = newf; |
768 | addrconf_forward_change(net, newf); | |
f3a1bfb1 ND |
769 | if ((!newf) ^ (!old)) |
770 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
771 | NETCONFA_IFINDEX_ALL, | |
772 | net->ipv6.devconf_all); | |
013d97e9 | 773 | } else if ((!newf) ^ (!old)) |
c8fecf22 | 774 | dev_forward_change((struct inet6_dev *)table->extra1); |
0187bdfb | 775 | rtnl_unlock(); |
c8fecf22 | 776 | |
013d97e9 | 777 | if (newf) |
7b4da532 | 778 | rt6_purge_dflt_routers(net); |
b325fddb | 779 | return 1; |
c8fecf22 | 780 | } |
35103d11 AG |
781 | |
782 | static void addrconf_linkdown_change(struct net *net, __s32 newf) | |
783 | { | |
784 | struct net_device *dev; | |
785 | struct inet6_dev *idev; | |
786 | ||
787 | for_each_netdev(net, dev) { | |
788 | idev = __in6_dev_get(dev); | |
789 | if (idev) { | |
790 | int changed = (!idev->cnf.ignore_routes_with_linkdown) ^ (!newf); | |
791 | ||
792 | idev->cnf.ignore_routes_with_linkdown = newf; | |
793 | if (changed) | |
794 | inet6_netconf_notify_devconf(dev_net(dev), | |
795 | NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, | |
796 | dev->ifindex, | |
797 | &idev->cnf); | |
798 | } | |
799 | } | |
800 | } | |
801 | ||
802 | static int addrconf_fixup_linkdown(struct ctl_table *table, int *p, int newf) | |
803 | { | |
804 | struct net *net; | |
805 | int old; | |
806 | ||
807 | if (!rtnl_trylock()) | |
808 | return restart_syscall(); | |
809 | ||
810 | net = (struct net *)table->extra2; | |
811 | old = *p; | |
812 | *p = newf; | |
813 | ||
814 | if (p == &net->ipv6.devconf_dflt->ignore_routes_with_linkdown) { | |
815 | if ((!newf) ^ (!old)) | |
816 | inet6_netconf_notify_devconf(net, | |
817 | NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, | |
818 | NETCONFA_IFINDEX_DEFAULT, | |
819 | net->ipv6.devconf_dflt); | |
820 | rtnl_unlock(); | |
821 | return 0; | |
822 | } | |
823 | ||
824 | if (p == &net->ipv6.devconf_all->ignore_routes_with_linkdown) { | |
825 | net->ipv6.devconf_dflt->ignore_routes_with_linkdown = newf; | |
826 | addrconf_linkdown_change(net, newf); | |
827 | if ((!newf) ^ (!old)) | |
828 | inet6_netconf_notify_devconf(net, | |
829 | NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, | |
830 | NETCONFA_IFINDEX_ALL, | |
831 | net->ipv6.devconf_all); | |
832 | } | |
833 | rtnl_unlock(); | |
834 | ||
835 | return 1; | |
836 | } | |
837 | ||
1da177e4 LT |
838 | #endif |
839 | ||
5c578aed | 840 | /* Nobody refers to this ifaddr, destroy it */ |
1da177e4 LT |
841 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) |
842 | { | |
c2e21293 | 843 | WARN_ON(!hlist_unhashed(&ifp->addr_lst)); |
547b792c | 844 | |
1da177e4 | 845 | #ifdef NET_REFCNT_DEBUG |
91df42be | 846 | pr_debug("%s\n", __func__); |
1da177e4 LT |
847 | #endif |
848 | ||
849 | in6_dev_put(ifp->idev); | |
850 | ||
c15b1cca HFS |
851 | if (cancel_delayed_work(&ifp->dad_work)) |
852 | pr_notice("delayed DAD work was pending while freeing ifa=%p\n", | |
853 | ifp); | |
1da177e4 | 854 | |
e9d3e084 | 855 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
f3213831 | 856 | pr_warn("Freeing alive inet6 address %p\n", ifp); |
1da177e4 LT |
857 | return; |
858 | } | |
94e187c0 | 859 | ip6_rt_put(ifp->rt); |
1da177e4 | 860 | |
e5785985 | 861 | kfree_rcu(ifp, rcu); |
1da177e4 LT |
862 | } |
863 | ||
e55ffac6 BH |
864 | static void |
865 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
866 | { | |
502a2ffd | 867 | struct list_head *p; |
8a6ce0c0 | 868 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
869 | |
870 | /* | |
871 | * Each device address list is sorted in order of scope - | |
872 | * global before linklocal. | |
873 | */ | |
502a2ffd | 874 | list_for_each(p, &idev->addr_list) { |
875 | struct inet6_ifaddr *ifa | |
876 | = list_entry(p, struct inet6_ifaddr, if_list); | |
8a6ce0c0 | 877 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
878 | break; |
879 | } | |
880 | ||
b54c9b98 | 881 | list_add_tail(&ifp->if_list, p); |
e55ffac6 BH |
882 | } |
883 | ||
ddbe5032 | 884 | static u32 inet6_addr_hash(const struct in6_addr *addr) |
3eb84f49 | 885 | { |
ddbe5032 | 886 | return hash_32(ipv6_addr_hash(addr), IN6_ADDR_HSIZE_SHIFT); |
3eb84f49 YH |
887 | } |
888 | ||
1da177e4 LT |
889 | /* On success it returns ifp with increased reference count */ |
890 | ||
891 | static struct inet6_ifaddr * | |
3f8f5298 JP |
892 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
893 | const struct in6_addr *peer_addr, int pfxlen, | |
8a226b2c | 894 | int scope, u32 flags, u32 valid_lft, u32 prefered_lft) |
1da177e4 LT |
895 | { |
896 | struct inet6_ifaddr *ifa = NULL; | |
897 | struct rt6_info *rt; | |
3a88a81d | 898 | unsigned int hash; |
1da177e4 | 899 | int err = 0; |
d68b8270 YH |
900 | int addr_type = ipv6_addr_type(addr); |
901 | ||
902 | if (addr_type == IPV6_ADDR_ANY || | |
903 | addr_type & IPV6_ADDR_MULTICAST || | |
904 | (!(idev->dev->flags & IFF_LOOPBACK) && | |
905 | addr_type & IPV6_ADDR_LOOPBACK)) | |
906 | return ERR_PTR(-EADDRNOTAVAIL); | |
1da177e4 | 907 | |
8814c4b5 | 908 | rcu_read_lock_bh(); |
1da177e4 LT |
909 | if (idev->dead) { |
910 | err = -ENODEV; /*XXX*/ | |
911 | goto out2; | |
912 | } | |
913 | ||
56d417b1 | 914 | if (idev->cnf.disable_ipv6) { |
9bdd8d40 BH |
915 | err = -EACCES; |
916 | goto out2; | |
917 | } | |
918 | ||
5c578aed | 919 | spin_lock(&addrconf_hash_lock); |
1da177e4 LT |
920 | |
921 | /* Ignore adding duplicate addresses on an interface */ | |
c346dca1 | 922 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
ba3542e1 | 923 | ADBG("ipv6_add_addr: already assigned\n"); |
1da177e4 LT |
924 | err = -EEXIST; |
925 | goto out; | |
926 | } | |
927 | ||
322f74a4 | 928 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 | 929 | |
63159f29 | 930 | if (!ifa) { |
ba3542e1 | 931 | ADBG("ipv6_add_addr: malloc failed\n"); |
1da177e4 LT |
932 | err = -ENOBUFS; |
933 | goto out; | |
934 | } | |
935 | ||
8f031519 | 936 | rt = addrconf_dst_alloc(idev, addr, false); |
1da177e4 LT |
937 | if (IS_ERR(rt)) { |
938 | err = PTR_ERR(rt); | |
939 | goto out; | |
940 | } | |
941 | ||
bba24896 JP |
942 | neigh_parms_data_state_setall(idev->nd_parms); |
943 | ||
4e3fd7a0 | 944 | ifa->addr = *addr; |
3f8f5298 JP |
945 | if (peer_addr) |
946 | ifa->peer_addr = *peer_addr; | |
1da177e4 LT |
947 | |
948 | spin_lock_init(&ifa->lock); | |
c15b1cca | 949 | INIT_DELAYED_WORK(&ifa->dad_work, addrconf_dad_work); |
c2e21293 | 950 | INIT_HLIST_NODE(&ifa->addr_lst); |
1da177e4 LT |
951 | ifa->scope = scope; |
952 | ifa->prefix_len = pfxlen; | |
953 | ifa->flags = flags | IFA_F_TENTATIVE; | |
8a226b2c JB |
954 | ifa->valid_lft = valid_lft; |
955 | ifa->prefered_lft = prefered_lft; | |
1da177e4 | 956 | ifa->cstamp = ifa->tstamp = jiffies; |
617fe29d | 957 | ifa->tokenized = false; |
1da177e4 | 958 | |
57f5f544 KF |
959 | ifa->rt = rt; |
960 | ||
1da177e4 LT |
961 | ifa->idev = idev; |
962 | in6_dev_hold(idev); | |
963 | /* For caller */ | |
964 | in6_ifa_hold(ifa); | |
965 | ||
966 | /* Add to big hash table */ | |
ddbe5032 | 967 | hash = inet6_addr_hash(addr); |
1da177e4 | 968 | |
5c578aed | 969 | hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]); |
5c578aed | 970 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
971 | |
972 | write_lock(&idev->lock); | |
973 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 974 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 | 975 | |
1da177e4 | 976 | if (ifa->flags&IFA_F_TEMPORARY) { |
372e6c8f | 977 | list_add(&ifa->tmp_list, &idev->tempaddr_list); |
1da177e4 LT |
978 | in6_ifa_hold(ifa); |
979 | } | |
1da177e4 | 980 | |
1da177e4 LT |
981 | in6_ifa_hold(ifa); |
982 | write_unlock(&idev->lock); | |
983 | out2: | |
8814c4b5 | 984 | rcu_read_unlock_bh(); |
1da177e4 | 985 | |
fd92833a | 986 | if (likely(err == 0)) |
f88c91dd | 987 | inet6addr_notifier_call_chain(NETDEV_UP, ifa); |
1da177e4 LT |
988 | else { |
989 | kfree(ifa); | |
990 | ifa = ERR_PTR(err); | |
991 | } | |
992 | ||
993 | return ifa; | |
994 | out: | |
5c578aed | 995 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
996 | goto out2; |
997 | } | |
998 | ||
5b84efec TH |
999 | enum cleanup_prefix_rt_t { |
1000 | CLEANUP_PREFIX_RT_NOP, /* no cleanup action for prefix route */ | |
1001 | CLEANUP_PREFIX_RT_DEL, /* delete the prefix route */ | |
1002 | CLEANUP_PREFIX_RT_EXPIRE, /* update the lifetime of the prefix route */ | |
1003 | }; | |
1004 | ||
1005 | /* | |
1006 | * Check, whether the prefix for ifp would still need a prefix route | |
1007 | * after deleting ifp. The function returns one of the CLEANUP_PREFIX_RT_* | |
1008 | * constants. | |
1009 | * | |
1010 | * 1) we don't purge prefix if address was not permanent. | |
1011 | * prefix is managed by its own lifetime. | |
1012 | * 2) we also don't purge, if the address was IFA_F_NOPREFIXROUTE. | |
1013 | * 3) if there are no addresses, delete prefix. | |
1014 | * 4) if there are still other permanent address(es), | |
1015 | * corresponding prefix is still permanent. | |
1016 | * 5) if there are still other addresses with IFA_F_NOPREFIXROUTE, | |
1017 | * don't purge the prefix, assume user space is managing it. | |
1018 | * 6) otherwise, update prefix lifetime to the | |
1019 | * longest valid lifetime among the corresponding | |
1020 | * addresses on the device. | |
1021 | * Note: subsequent RA will update lifetime. | |
1022 | **/ | |
1023 | static enum cleanup_prefix_rt_t | |
1024 | check_cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long *expires) | |
1025 | { | |
1026 | struct inet6_ifaddr *ifa; | |
1027 | struct inet6_dev *idev = ifp->idev; | |
1028 | unsigned long lifetime; | |
1029 | enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_DEL; | |
1030 | ||
1031 | *expires = jiffies; | |
1032 | ||
1033 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
1034 | if (ifa == ifp) | |
1035 | continue; | |
1036 | if (!ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
1037 | ifp->prefix_len)) | |
1038 | continue; | |
1039 | if (ifa->flags & (IFA_F_PERMANENT | IFA_F_NOPREFIXROUTE)) | |
1040 | return CLEANUP_PREFIX_RT_NOP; | |
1041 | ||
1042 | action = CLEANUP_PREFIX_RT_EXPIRE; | |
1043 | ||
1044 | spin_lock(&ifa->lock); | |
1045 | ||
1046 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); | |
1047 | /* | |
1048 | * Note: Because this address is | |
1049 | * not permanent, lifetime < | |
1050 | * LONG_MAX / HZ here. | |
1051 | */ | |
1052 | if (time_before(*expires, ifa->tstamp + lifetime * HZ)) | |
1053 | *expires = ifa->tstamp + lifetime * HZ; | |
1054 | spin_unlock(&ifa->lock); | |
1055 | } | |
1056 | ||
1057 | return action; | |
1058 | } | |
1059 | ||
1060 | static void | |
1061 | cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long expires, bool del_rt) | |
1062 | { | |
1063 | struct rt6_info *rt; | |
1064 | ||
1065 | rt = addrconf_get_prefix_route(&ifp->addr, | |
1066 | ifp->prefix_len, | |
1067 | ifp->idev->dev, | |
1068 | 0, RTF_GATEWAY | RTF_DEFAULT); | |
1069 | if (rt) { | |
1070 | if (del_rt) | |
1071 | ip6_del_rt(rt); | |
1072 | else { | |
1073 | if (!(rt->rt6i_flags & RTF_EXPIRES)) | |
1074 | rt6_set_expires(rt, expires); | |
1075 | ip6_rt_put(rt); | |
1076 | } | |
1077 | } | |
1078 | } | |
1079 | ||
1080 | ||
1da177e4 LT |
1081 | /* This function wants to get referenced ifp and releases it before return */ |
1082 | ||
1083 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
1084 | { | |
4c5ff6a6 | 1085 | int state; |
5b84efec TH |
1086 | enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_NOP; |
1087 | unsigned long expires; | |
1da177e4 | 1088 | |
c15b1cca HFS |
1089 | ASSERT_RTNL(); |
1090 | ||
8e8e676d | 1091 | spin_lock_bh(&ifp->lock); |
4c5ff6a6 | 1092 | state = ifp->state; |
e9d3e084 | 1093 | ifp->state = INET6_IFADDR_STATE_DEAD; |
8e8e676d | 1094 | spin_unlock_bh(&ifp->lock); |
4c5ff6a6 HX |
1095 | |
1096 | if (state == INET6_IFADDR_STATE_DEAD) | |
1097 | goto out; | |
1da177e4 | 1098 | |
5c578aed | 1099 | spin_lock_bh(&addrconf_hash_lock); |
1100 | hlist_del_init_rcu(&ifp->addr_lst); | |
5c578aed | 1101 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 | 1102 | |
5b84efec | 1103 | write_lock_bh(&ifp->idev->lock); |
5d9efa7e | 1104 | |
1da177e4 | 1105 | if (ifp->flags&IFA_F_TEMPORARY) { |
372e6c8f | 1106 | list_del(&ifp->tmp_list); |
1107 | if (ifp->ifpub) { | |
1108 | in6_ifa_put(ifp->ifpub); | |
1109 | ifp->ifpub = NULL; | |
1da177e4 | 1110 | } |
372e6c8f | 1111 | __in6_ifa_put(ifp); |
1da177e4 | 1112 | } |
1da177e4 | 1113 | |
5b84efec TH |
1114 | if (ifp->flags & IFA_F_PERMANENT && !(ifp->flags & IFA_F_NOPREFIXROUTE)) |
1115 | action = check_cleanup_prefix_route(ifp, &expires); | |
502a2ffd | 1116 | |
5b84efec TH |
1117 | list_del_init(&ifp->if_list); |
1118 | __in6_ifa_put(ifp); | |
1119 | ||
1120 | write_unlock_bh(&ifp->idev->lock); | |
1da177e4 | 1121 | |
c15b1cca | 1122 | addrconf_del_dad_work(ifp); |
b2238566 | 1123 | |
1da177e4 LT |
1124 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
1125 | ||
f88c91dd | 1126 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifp); |
1da177e4 | 1127 | |
5b84efec TH |
1128 | if (action != CLEANUP_PREFIX_RT_NOP) { |
1129 | cleanup_prefix_route(ifp, expires, | |
1130 | action == CLEANUP_PREFIX_RT_DEL); | |
1da177e4 LT |
1131 | } |
1132 | ||
c3968a85 DW |
1133 | /* clean up prefsrc entries */ |
1134 | rt6_remove_prefsrc(ifp); | |
4c5ff6a6 | 1135 | out: |
1da177e4 LT |
1136 | in6_ifa_put(ifp); |
1137 | } | |
1138 | ||
1da177e4 LT |
1139 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) |
1140 | { | |
1141 | struct inet6_dev *idev = ifp->idev; | |
1142 | struct in6_addr addr, *tmpaddr; | |
76f793e3 | 1143 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age; |
eac55bf9 | 1144 | unsigned long regen_advance; |
1da177e4 LT |
1145 | int tmp_plen; |
1146 | int ret = 0; | |
95c385b4 | 1147 | u32 addr_flags; |
76f793e3 | 1148 | unsigned long now = jiffies; |
1da177e4 | 1149 | |
53bd6749 | 1150 | write_lock_bh(&idev->lock); |
1da177e4 LT |
1151 | if (ift) { |
1152 | spin_lock_bh(&ift->lock); | |
1153 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
1154 | spin_unlock_bh(&ift->lock); | |
1155 | tmpaddr = &addr; | |
1156 | } else { | |
1157 | tmpaddr = NULL; | |
1158 | } | |
1159 | retry: | |
1160 | in6_dev_hold(idev); | |
1161 | if (idev->cnf.use_tempaddr <= 0) { | |
53bd6749 | 1162 | write_unlock_bh(&idev->lock); |
f3213831 | 1163 | pr_info("%s: use_tempaddr is disabled\n", __func__); |
1da177e4 LT |
1164 | in6_dev_put(idev); |
1165 | ret = -1; | |
1166 | goto out; | |
1167 | } | |
1168 | spin_lock_bh(&ifp->lock); | |
1169 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
1170 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
1171 | spin_unlock_bh(&ifp->lock); | |
53bd6749 | 1172 | write_unlock_bh(&idev->lock); |
f3213831 JP |
1173 | pr_warn("%s: regeneration time exceeded - disabled temporary address support\n", |
1174 | __func__); | |
1da177e4 LT |
1175 | in6_dev_put(idev); |
1176 | ret = -1; | |
1177 | goto out; | |
1178 | } | |
1179 | in6_ifa_hold(ifp); | |
1180 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
eb7e0575 | 1181 | __ipv6_try_regen_rndid(idev, tmpaddr); |
1da177e4 | 1182 | memcpy(&addr.s6_addr[8], idev->rndid, 8); |
76f793e3 | 1183 | age = (now - ifp->tstamp) / HZ; |
1da177e4 LT |
1184 | tmp_valid_lft = min_t(__u32, |
1185 | ifp->valid_lft, | |
7a876b0e | 1186 | idev->cnf.temp_valid_lft + age); |
1ab1457c YH |
1187 | tmp_prefered_lft = min_t(__u32, |
1188 | ifp->prefered_lft, | |
7a876b0e | 1189 | idev->cnf.temp_prefered_lft + age - |
784e2710 | 1190 | idev->cnf.max_desync_factor); |
1da177e4 | 1191 | tmp_plen = ifp->prefix_len; |
1da177e4 LT |
1192 | tmp_tstamp = ifp->tstamp; |
1193 | spin_unlock_bh(&ifp->lock); | |
1194 | ||
eac55bf9 | 1195 | regen_advance = idev->cnf.regen_max_retry * |
67ba4152 IM |
1196 | idev->cnf.dad_transmits * |
1197 | NEIGH_VAR(idev->nd_parms, RETRANS_TIME) / HZ; | |
53bd6749 | 1198 | write_unlock_bh(&idev->lock); |
95c385b4 | 1199 | |
eac55bf9 BB |
1200 | /* A temporary address is created only if this calculated Preferred |
1201 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, | |
1202 | * an implementation must not create a temporary address with a zero | |
1203 | * Preferred Lifetime. | |
ecab6701 HK |
1204 | * Use age calculation as in addrconf_verify to avoid unnecessary |
1205 | * temporary addresses being generated. | |
eac55bf9 | 1206 | */ |
ecab6701 HK |
1207 | age = (now - tmp_tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; |
1208 | if (tmp_prefered_lft <= regen_advance + age) { | |
eac55bf9 BB |
1209 | in6_ifa_put(ifp); |
1210 | in6_dev_put(idev); | |
1211 | ret = -1; | |
1212 | goto out; | |
1213 | } | |
1214 | ||
95c385b4 NH |
1215 | addr_flags = IFA_F_TEMPORARY; |
1216 | /* set in addrconf_prefix_rcv() */ | |
1217 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
1218 | addr_flags |= IFA_F_OPTIMISTIC; | |
1219 | ||
4b08a8f1 HFS |
1220 | ift = ipv6_add_addr(idev, &addr, NULL, tmp_plen, |
1221 | ipv6_addr_scope(&addr), addr_flags, | |
1222 | tmp_valid_lft, tmp_prefered_lft); | |
1223 | if (IS_ERR(ift)) { | |
1da177e4 LT |
1224 | in6_ifa_put(ifp); |
1225 | in6_dev_put(idev); | |
f3213831 | 1226 | pr_info("%s: retry temporary address regeneration\n", __func__); |
1da177e4 | 1227 | tmpaddr = &addr; |
53bd6749 | 1228 | write_lock_bh(&idev->lock); |
1da177e4 LT |
1229 | goto retry; |
1230 | } | |
1231 | ||
1232 | spin_lock_bh(&ift->lock); | |
1233 | ift->ifpub = ifp; | |
76f793e3 | 1234 | ift->cstamp = now; |
1da177e4 LT |
1235 | ift->tstamp = tmp_tstamp; |
1236 | spin_unlock_bh(&ift->lock); | |
1237 | ||
cf22f9a2 | 1238 | addrconf_dad_start(ift); |
1da177e4 LT |
1239 | in6_ifa_put(ift); |
1240 | in6_dev_put(idev); | |
1241 | out: | |
1242 | return ret; | |
1243 | } | |
1da177e4 LT |
1244 | |
1245 | /* | |
072047e4 | 1246 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 1247 | */ |
a9b05723 YH |
1248 | enum { |
1249 | IPV6_SADDR_RULE_INIT = 0, | |
1250 | IPV6_SADDR_RULE_LOCAL, | |
1251 | IPV6_SADDR_RULE_SCOPE, | |
1252 | IPV6_SADDR_RULE_PREFERRED, | |
1253 | #ifdef CONFIG_IPV6_MIP6 | |
1254 | IPV6_SADDR_RULE_HOA, | |
1255 | #endif | |
1256 | IPV6_SADDR_RULE_OIF, | |
1257 | IPV6_SADDR_RULE_LABEL, | |
a9b05723 | 1258 | IPV6_SADDR_RULE_PRIVACY, |
a9b05723 YH |
1259 | IPV6_SADDR_RULE_ORCHID, |
1260 | IPV6_SADDR_RULE_PREFIX, | |
7fd2561e EK |
1261 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
1262 | IPV6_SADDR_RULE_NOT_OPTIMISTIC, | |
1263 | #endif | |
a9b05723 YH |
1264 | IPV6_SADDR_RULE_MAX |
1265 | }; | |
1266 | ||
072047e4 | 1267 | struct ipv6_saddr_score { |
a9b05723 YH |
1268 | int rule; |
1269 | int addr_type; | |
1270 | struct inet6_ifaddr *ifa; | |
1271 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); | |
1272 | int scopedist; | |
1273 | int matchlen; | |
072047e4 YH |
1274 | }; |
1275 | ||
a9b05723 | 1276 | struct ipv6_saddr_dst { |
9acd9f3a | 1277 | const struct in6_addr *addr; |
a9b05723 YH |
1278 | int ifindex; |
1279 | int scope; | |
1280 | int label; | |
7cbca67c | 1281 | unsigned int prefs; |
a9b05723 | 1282 | }; |
072047e4 | 1283 | |
b6f99a21 | 1284 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 1285 | { |
45bb0060 | 1286 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK)) |
072047e4 YH |
1287 | return 1; |
1288 | return 0; | |
1da177e4 LT |
1289 | } |
1290 | ||
7fd2561e EK |
1291 | static inline bool ipv6_use_optimistic_addr(struct inet6_dev *idev) |
1292 | { | |
1293 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
1294 | return idev && idev->cnf.optimistic_dad && idev->cnf.use_optimistic; | |
1295 | #else | |
1296 | return false; | |
1297 | #endif | |
1298 | } | |
1299 | ||
3de23255 BT |
1300 | static int ipv6_get_saddr_eval(struct net *net, |
1301 | struct ipv6_saddr_score *score, | |
a9b05723 YH |
1302 | struct ipv6_saddr_dst *dst, |
1303 | int i) | |
1304 | { | |
1305 | int ret; | |
1306 | ||
1307 | if (i <= score->rule) { | |
1308 | switch (i) { | |
1309 | case IPV6_SADDR_RULE_SCOPE: | |
1310 | ret = score->scopedist; | |
1311 | break; | |
1312 | case IPV6_SADDR_RULE_PREFIX: | |
1313 | ret = score->matchlen; | |
1314 | break; | |
1315 | default: | |
1316 | ret = !!test_bit(i, score->scorebits); | |
1317 | } | |
1318 | goto out; | |
1319 | } | |
1320 | ||
1321 | switch (i) { | |
1322 | case IPV6_SADDR_RULE_INIT: | |
1323 | /* Rule 0: remember if hiscore is not ready yet */ | |
1324 | ret = !!score->ifa; | |
1325 | break; | |
1326 | case IPV6_SADDR_RULE_LOCAL: | |
1327 | /* Rule 1: Prefer same address */ | |
1328 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); | |
1329 | break; | |
1330 | case IPV6_SADDR_RULE_SCOPE: | |
1331 | /* Rule 2: Prefer appropriate scope | |
1332 | * | |
1333 | * ret | |
1334 | * ^ | |
1335 | * -1 | d 15 | |
1336 | * ---+--+-+---> scope | |
1337 | * | | |
1338 | * | d is scope of the destination. | |
1339 | * B-d | \ | |
1340 | * | \ <- smaller scope is better if | |
db9c7c39 | 1341 | * B-15 | \ if scope is enough for destination. |
a9b05723 YH |
1342 | * | ret = B - scope (-1 <= scope >= d <= 15). |
1343 | * d-C-1 | / | |
1344 | * |/ <- greater is better | |
1345 | * -C / if scope is not enough for destination. | |
1346 | * /| ret = scope - C (-1 <= d < scope <= 15). | |
1347 | * | |
1348 | * d - C - 1 < B -15 (for all -1 <= d <= 15). | |
1349 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. | |
1350 | * Assume B = 0 and we get C > 29. | |
1351 | */ | |
1352 | ret = __ipv6_addr_src_scope(score->addr_type); | |
1353 | if (ret >= dst->scope) | |
1354 | ret = -ret; | |
1355 | else | |
1356 | ret -= 128; /* 30 is enough */ | |
1357 | score->scopedist = ret; | |
1358 | break; | |
1359 | case IPV6_SADDR_RULE_PREFERRED: | |
7fd2561e | 1360 | { |
a9b05723 | 1361 | /* Rule 3: Avoid deprecated and optimistic addresses */ |
7fd2561e EK |
1362 | u8 avoid = IFA_F_DEPRECATED; |
1363 | ||
1364 | if (!ipv6_use_optimistic_addr(score->ifa->idev)) | |
1365 | avoid |= IFA_F_OPTIMISTIC; | |
a9b05723 | 1366 | ret = ipv6_saddr_preferred(score->addr_type) || |
7fd2561e | 1367 | !(score->ifa->flags & avoid); |
a9b05723 | 1368 | break; |
7fd2561e | 1369 | } |
a9b05723 YH |
1370 | #ifdef CONFIG_IPV6_MIP6 |
1371 | case IPV6_SADDR_RULE_HOA: | |
7cbca67c | 1372 | { |
a9b05723 | 1373 | /* Rule 4: Prefer home address */ |
7cbca67c YH |
1374 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
1375 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; | |
a9b05723 | 1376 | break; |
7cbca67c | 1377 | } |
a9b05723 YH |
1378 | #endif |
1379 | case IPV6_SADDR_RULE_OIF: | |
1380 | /* Rule 5: Prefer outgoing interface */ | |
1381 | ret = (!dst->ifindex || | |
1382 | dst->ifindex == score->ifa->idev->dev->ifindex); | |
1383 | break; | |
1384 | case IPV6_SADDR_RULE_LABEL: | |
1385 | /* Rule 6: Prefer matching label */ | |
3de23255 BT |
1386 | ret = ipv6_addr_label(net, |
1387 | &score->ifa->addr, score->addr_type, | |
a9b05723 YH |
1388 | score->ifa->idev->dev->ifindex) == dst->label; |
1389 | break; | |
a9b05723 | 1390 | case IPV6_SADDR_RULE_PRIVACY: |
7cbca67c | 1391 | { |
a9b05723 | 1392 | /* Rule 7: Prefer public address |
25985edc | 1393 | * Note: prefer temporary address if use_tempaddr >= 2 |
a9b05723 | 1394 | */ |
7cbca67c YH |
1395 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
1396 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : | |
1397 | score->ifa->idev->cnf.use_tempaddr >= 2; | |
1398 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; | |
a9b05723 | 1399 | break; |
7cbca67c | 1400 | } |
a9b05723 YH |
1401 | case IPV6_SADDR_RULE_ORCHID: |
1402 | /* Rule 8-: Prefer ORCHID vs ORCHID or | |
1403 | * non-ORCHID vs non-ORCHID | |
1404 | */ | |
1405 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ | |
1406 | ipv6_addr_orchid(dst->addr)); | |
1407 | break; | |
1408 | case IPV6_SADDR_RULE_PREFIX: | |
1409 | /* Rule 8: Use longest matching prefix */ | |
91b4b04f YH |
1410 | ret = ipv6_addr_diff(&score->ifa->addr, dst->addr); |
1411 | if (ret > score->ifa->prefix_len) | |
1412 | ret = score->ifa->prefix_len; | |
1413 | score->matchlen = ret; | |
a9b05723 | 1414 | break; |
7fd2561e EK |
1415 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
1416 | case IPV6_SADDR_RULE_NOT_OPTIMISTIC: | |
1417 | /* Optimistic addresses still have lower precedence than other | |
1418 | * preferred addresses. | |
1419 | */ | |
1420 | ret = !(score->ifa->flags & IFA_F_OPTIMISTIC); | |
1421 | break; | |
1422 | #endif | |
a9b05723 YH |
1423 | default: |
1424 | ret = 0; | |
1425 | } | |
1426 | ||
1427 | if (ret) | |
1428 | __set_bit(i, score->scorebits); | |
1429 | score->rule = i; | |
1430 | out: | |
1431 | return ret; | |
1432 | } | |
1433 | ||
c0b8da1e YH |
1434 | static int __ipv6_dev_get_saddr(struct net *net, |
1435 | struct ipv6_saddr_dst *dst, | |
c0b8da1e YH |
1436 | struct inet6_dev *idev, |
1437 | struct ipv6_saddr_score *scores, | |
1438 | int hiscore_idx) | |
9131f3de | 1439 | { |
c0b8da1e | 1440 | struct ipv6_saddr_score *score = &scores[1 - hiscore_idx], *hiscore = &scores[hiscore_idx]; |
9131f3de YH |
1441 | |
1442 | read_lock_bh(&idev->lock); | |
1443 | list_for_each_entry(score->ifa, &idev->addr_list, if_list) { | |
1444 | int i; | |
1445 | ||
1446 | /* | |
1447 | * - Tentative Address (RFC2462 section 5.4) | |
1448 | * - A tentative address is not considered | |
1449 | * "assigned to an interface" in the traditional | |
1450 | * sense, unless it is also flagged as optimistic. | |
1451 | * - Candidate Source Address (section 4) | |
1452 | * - In any case, anycast addresses, multicast | |
1453 | * addresses, and the unspecified address MUST | |
1454 | * NOT be included in a candidate set. | |
1455 | */ | |
1456 | if ((score->ifa->flags & IFA_F_TENTATIVE) && | |
1457 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) | |
1458 | continue; | |
1459 | ||
1460 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); | |
1461 | ||
1462 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || | |
1463 | score->addr_type & IPV6_ADDR_MULTICAST)) { | |
1464 | net_dbg_ratelimited("ADDRCONF: unspecified / multicast address assigned as unicast address on %s", | |
1465 | idev->dev->name); | |
1466 | continue; | |
1467 | } | |
1468 | ||
1469 | score->rule = -1; | |
1470 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); | |
1471 | ||
1472 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { | |
1473 | int minihiscore, miniscore; | |
1474 | ||
1475 | minihiscore = ipv6_get_saddr_eval(net, hiscore, dst, i); | |
1476 | miniscore = ipv6_get_saddr_eval(net, score, dst, i); | |
1477 | ||
1478 | if (minihiscore > miniscore) { | |
1479 | if (i == IPV6_SADDR_RULE_SCOPE && | |
1480 | score->scopedist > 0) { | |
1481 | /* | |
1482 | * special case: | |
1483 | * each remaining entry | |
1484 | * has too small (not enough) | |
1485 | * scope, because ifa entries | |
1486 | * are sorted by their scope | |
1487 | * values. | |
1488 | */ | |
1489 | goto out; | |
1490 | } | |
1491 | break; | |
1492 | } else if (minihiscore < miniscore) { | |
1493 | if (hiscore->ifa) | |
1494 | in6_ifa_put(hiscore->ifa); | |
1495 | ||
1496 | in6_ifa_hold(score->ifa); | |
1497 | ||
1498 | swap(hiscore, score); | |
c0b8da1e | 1499 | hiscore_idx = 1 - hiscore_idx; |
9131f3de YH |
1500 | |
1501 | /* restore our iterator */ | |
1502 | score->ifa = hiscore->ifa; | |
1503 | ||
1504 | break; | |
1505 | } | |
1506 | } | |
1507 | } | |
1508 | out: | |
1509 | read_unlock_bh(&idev->lock); | |
c0b8da1e | 1510 | return hiscore_idx; |
9131f3de YH |
1511 | } |
1512 | ||
b3f644fc | 1513 | int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev, |
9acd9f3a | 1514 | const struct in6_addr *daddr, unsigned int prefs, |
7cbca67c | 1515 | struct in6_addr *saddr) |
1da177e4 | 1516 | { |
c0b8da1e | 1517 | struct ipv6_saddr_score scores[2], *hiscore; |
a9b05723 | 1518 | struct ipv6_saddr_dst dst; |
9131f3de | 1519 | struct inet6_dev *idev; |
072047e4 | 1520 | struct net_device *dev; |
a9b05723 | 1521 | int dst_type; |
9131f3de | 1522 | bool use_oif_addr = false; |
c0b8da1e | 1523 | int hiscore_idx = 0; |
1da177e4 | 1524 | |
a9b05723 YH |
1525 | dst_type = __ipv6_addr_type(daddr); |
1526 | dst.addr = daddr; | |
1527 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; | |
1528 | dst.scope = __ipv6_addr_src_scope(dst_type); | |
3de23255 | 1529 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
7cbca67c | 1530 | dst.prefs = prefs; |
a9b05723 | 1531 | |
c0b8da1e YH |
1532 | scores[hiscore_idx].rule = -1; |
1533 | scores[hiscore_idx].ifa = NULL; | |
1da177e4 | 1534 | |
8814c4b5 | 1535 | rcu_read_lock(); |
1da177e4 | 1536 | |
9131f3de YH |
1537 | /* Candidate Source Address (section 4) |
1538 | * - multicast and link-local destination address, | |
1539 | * the set of candidate source address MUST only | |
1540 | * include addresses assigned to interfaces | |
1541 | * belonging to the same link as the outgoing | |
1542 | * interface. | |
1543 | * (- For site-local destination addresses, the | |
1544 | * set of candidate source addresses MUST only | |
1545 | * include addresses assigned to interfaces | |
1546 | * belonging to the same site as the outgoing | |
1547 | * interface.) | |
3985e8a3 EK |
1548 | * - "It is RECOMMENDED that the candidate source addresses |
1549 | * be the set of unicast addresses assigned to the | |
1550 | * interface that will be used to send to the destination | |
1551 | * (the 'outgoing' interface)." (RFC 6724) | |
9131f3de YH |
1552 | */ |
1553 | if (dst_dev) { | |
3985e8a3 | 1554 | idev = __in6_dev_get(dst_dev); |
9131f3de | 1555 | if ((dst_type & IPV6_ADDR_MULTICAST) || |
3985e8a3 EK |
1556 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL || |
1557 | (idev && idev->cnf.use_oif_addrs_only)) { | |
9131f3de YH |
1558 | use_oif_addr = true; |
1559 | } | |
1560 | } | |
a9b05723 | 1561 | |
9131f3de | 1562 | if (use_oif_addr) { |
c0b8da1e | 1563 | if (idev) |
c15df306 | 1564 | hiscore_idx = __ipv6_dev_get_saddr(net, &dst, idev, scores, hiscore_idx); |
9131f3de YH |
1565 | } else { |
1566 | for_each_netdev_rcu(net, dev) { | |
1567 | idev = __in6_dev_get(dev); | |
1568 | if (!idev) | |
072047e4 | 1569 | continue; |
c15df306 | 1570 | hiscore_idx = __ipv6_dev_get_saddr(net, &dst, idev, scores, hiscore_idx); |
1da177e4 LT |
1571 | } |
1572 | } | |
8814c4b5 | 1573 | rcu_read_unlock(); |
1da177e4 | 1574 | |
c0b8da1e | 1575 | hiscore = &scores[hiscore_idx]; |
a9b05723 | 1576 | if (!hiscore->ifa) |
072047e4 | 1577 | return -EADDRNOTAVAIL; |
1ab1457c | 1578 | |
4e3fd7a0 | 1579 | *saddr = hiscore->ifa->addr; |
a9b05723 | 1580 | in6_ifa_put(hiscore->ifa); |
072047e4 | 1581 | return 0; |
1da177e4 | 1582 | } |
5e5f3f0f | 1583 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
1da177e4 | 1584 | |
8965779d | 1585 | int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, |
479840ff | 1586 | u32 banned_flags) |
b7b1bfce HFS |
1587 | { |
1588 | struct inet6_ifaddr *ifp; | |
1589 | int err = -EADDRNOTAVAIL; | |
1590 | ||
602582ca HFS |
1591 | list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) { |
1592 | if (ifp->scope > IFA_LINK) | |
1593 | break; | |
b7b1bfce HFS |
1594 | if (ifp->scope == IFA_LINK && |
1595 | !(ifp->flags & banned_flags)) { | |
1596 | *addr = ifp->addr; | |
1597 | err = 0; | |
1598 | break; | |
1599 | } | |
1600 | } | |
1601 | return err; | |
1602 | } | |
1603 | ||
95c385b4 | 1604 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
479840ff | 1605 | u32 banned_flags) |
1da177e4 LT |
1606 | { |
1607 | struct inet6_dev *idev; | |
1608 | int err = -EADDRNOTAVAIL; | |
1609 | ||
8814c4b5 | 1610 | rcu_read_lock(); |
e21e8467 SH |
1611 | idev = __in6_dev_get(dev); |
1612 | if (idev) { | |
1da177e4 | 1613 | read_lock_bh(&idev->lock); |
b7b1bfce | 1614 | err = __ipv6_get_lladdr(idev, addr, banned_flags); |
1da177e4 LT |
1615 | read_unlock_bh(&idev->lock); |
1616 | } | |
8814c4b5 | 1617 | rcu_read_unlock(); |
1da177e4 LT |
1618 | return err; |
1619 | } | |
1620 | ||
1621 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1622 | { | |
1623 | int cnt = 0; | |
1624 | struct inet6_ifaddr *ifp; | |
1625 | ||
1626 | read_lock_bh(&idev->lock); | |
502a2ffd | 1627 | list_for_each_entry(ifp, &idev->addr_list, if_list) |
1da177e4 LT |
1628 | cnt++; |
1629 | read_unlock_bh(&idev->lock); | |
1630 | return cnt; | |
1631 | } | |
1632 | ||
b71d1d42 | 1633 | int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
2a7851bf | 1634 | const struct net_device *dev, int strict) |
c58da4c6 EK |
1635 | { |
1636 | return ipv6_chk_addr_and_flags(net, addr, dev, strict, IFA_F_TENTATIVE); | |
1637 | } | |
1638 | EXPORT_SYMBOL(ipv6_chk_addr); | |
1639 | ||
1640 | int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr, | |
1641 | const struct net_device *dev, int strict, | |
1642 | u32 banned_flags) | |
1da177e4 | 1643 | { |
eedf042a | 1644 | struct inet6_ifaddr *ifp; |
ddbe5032 | 1645 | unsigned int hash = inet6_addr_hash(addr); |
c58da4c6 | 1646 | u32 ifp_flags; |
1da177e4 | 1647 | |
5c578aed | 1648 | rcu_read_lock_bh(); |
b67bfe0d | 1649 | hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1650 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
bfeade08 | 1651 | continue; |
c58da4c6 EK |
1652 | /* Decouple optimistic from tentative for evaluation here. |
1653 | * Ban optimistic addresses explicitly, when required. | |
1654 | */ | |
1655 | ifp_flags = (ifp->flags&IFA_F_OPTIMISTIC) | |
1656 | ? (ifp->flags&~IFA_F_TENTATIVE) | |
1657 | : ifp->flags; | |
1da177e4 | 1658 | if (ipv6_addr_equal(&ifp->addr, addr) && |
c58da4c6 | 1659 | !(ifp_flags&banned_flags) && |
63159f29 | 1660 | (!dev || ifp->idev->dev == dev || |
eedf042a SH |
1661 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) { |
1662 | rcu_read_unlock_bh(); | |
1663 | return 1; | |
1da177e4 LT |
1664 | } |
1665 | } | |
5c578aed | 1666 | |
eedf042a SH |
1667 | rcu_read_unlock_bh(); |
1668 | return 0; | |
1da177e4 | 1669 | } |
c58da4c6 | 1670 | EXPORT_SYMBOL(ipv6_chk_addr_and_flags); |
7159039a | 1671 | |
3e81c6da DM |
1672 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
1673 | struct net_device *dev) | |
1da177e4 | 1674 | { |
ddbe5032 | 1675 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 1676 | struct inet6_ifaddr *ifp; |
1da177e4 | 1677 | |
b67bfe0d | 1678 | hlist_for_each_entry(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1679 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
06bfe655 | 1680 | continue; |
1da177e4 | 1681 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
63159f29 | 1682 | if (!dev || ifp->idev->dev == dev) |
3e81c6da | 1683 | return true; |
1da177e4 LT |
1684 | } |
1685 | } | |
3e81c6da | 1686 | return false; |
1da177e4 LT |
1687 | } |
1688 | ||
7df37ff3 CB |
1689 | /* Compares an address/prefix_len with addresses on device @dev. |
1690 | * If one is found it returns true. | |
1691 | */ | |
1692 | bool ipv6_chk_custom_prefix(const struct in6_addr *addr, | |
1693 | const unsigned int prefix_len, struct net_device *dev) | |
1694 | { | |
1695 | struct inet6_dev *idev; | |
1696 | struct inet6_ifaddr *ifa; | |
1697 | bool ret = false; | |
1698 | ||
1699 | rcu_read_lock(); | |
1700 | idev = __in6_dev_get(dev); | |
1701 | if (idev) { | |
1702 | read_lock_bh(&idev->lock); | |
1703 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
1704 | ret = ipv6_prefix_equal(addr, &ifa->addr, prefix_len); | |
1705 | if (ret) | |
1706 | break; | |
1707 | } | |
1708 | read_unlock_bh(&idev->lock); | |
1709 | } | |
1710 | rcu_read_unlock(); | |
1711 | ||
1712 | return ret; | |
1713 | } | |
1714 | EXPORT_SYMBOL(ipv6_chk_custom_prefix); | |
1715 | ||
b71d1d42 | 1716 | int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev) |
52eeeb84 YH |
1717 | { |
1718 | struct inet6_dev *idev; | |
1719 | struct inet6_ifaddr *ifa; | |
1720 | int onlink; | |
1721 | ||
1722 | onlink = 0; | |
1723 | rcu_read_lock(); | |
1724 | idev = __in6_dev_get(dev); | |
1725 | if (idev) { | |
1726 | read_lock_bh(&idev->lock); | |
502a2ffd | 1727 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
52eeeb84 YH |
1728 | onlink = ipv6_prefix_equal(addr, &ifa->addr, |
1729 | ifa->prefix_len); | |
1730 | if (onlink) | |
1731 | break; | |
1732 | } | |
1733 | read_unlock_bh(&idev->lock); | |
1734 | } | |
1735 | rcu_read_unlock(); | |
1736 | return onlink; | |
1737 | } | |
52eeeb84 YH |
1738 | EXPORT_SYMBOL(ipv6_chk_prefix); |
1739 | ||
9acd9f3a | 1740 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, |
1cab3da6 | 1741 | struct net_device *dev, int strict) |
1da177e4 | 1742 | { |
b79d1d54 | 1743 | struct inet6_ifaddr *ifp, *result = NULL; |
ddbe5032 | 1744 | unsigned int hash = inet6_addr_hash(addr); |
1da177e4 | 1745 | |
5c578aed | 1746 | rcu_read_lock_bh(); |
b67bfe0d | 1747 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1748 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
1cab3da6 | 1749 | continue; |
1da177e4 | 1750 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
63159f29 | 1751 | if (!dev || ifp->idev->dev == dev || |
1da177e4 | 1752 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { |
b79d1d54 | 1753 | result = ifp; |
1da177e4 LT |
1754 | in6_ifa_hold(ifp); |
1755 | break; | |
1756 | } | |
1757 | } | |
1758 | } | |
5c578aed | 1759 | rcu_read_unlock_bh(); |
1da177e4 | 1760 | |
b79d1d54 | 1761 | return result; |
1da177e4 LT |
1762 | } |
1763 | ||
1da177e4 LT |
1764 | /* Gets referenced address, destroys ifaddr */ |
1765 | ||
cc411d0b | 1766 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) |
1da177e4 | 1767 | { |
1da177e4 LT |
1768 | if (ifp->flags&IFA_F_PERMANENT) { |
1769 | spin_lock_bh(&ifp->lock); | |
c15b1cca | 1770 | addrconf_del_dad_work(ifp); |
1da177e4 | 1771 | ifp->flags |= IFA_F_TENTATIVE; |
cc411d0b BH |
1772 | if (dad_failed) |
1773 | ifp->flags |= IFA_F_DADFAILED; | |
1da177e4 | 1774 | spin_unlock_bh(&ifp->lock); |
e2577a06 HX |
1775 | if (dad_failed) |
1776 | ipv6_ifa_notify(0, ifp); | |
1da177e4 | 1777 | in6_ifa_put(ifp); |
1da177e4 LT |
1778 | } else if (ifp->flags&IFA_F_TEMPORARY) { |
1779 | struct inet6_ifaddr *ifpub; | |
1780 | spin_lock_bh(&ifp->lock); | |
1781 | ifpub = ifp->ifpub; | |
1782 | if (ifpub) { | |
1783 | in6_ifa_hold(ifpub); | |
1784 | spin_unlock_bh(&ifp->lock); | |
1785 | ipv6_create_tempaddr(ifpub, ifp); | |
1786 | in6_ifa_put(ifpub); | |
1787 | } else { | |
1788 | spin_unlock_bh(&ifp->lock); | |
1789 | } | |
1790 | ipv6_del_addr(ifp); | |
c15b1cca | 1791 | } else { |
1da177e4 | 1792 | ipv6_del_addr(ifp); |
c15b1cca | 1793 | } |
1da177e4 LT |
1794 | } |
1795 | ||
f2344a13 HX |
1796 | static int addrconf_dad_end(struct inet6_ifaddr *ifp) |
1797 | { | |
1798 | int err = -ENOENT; | |
1799 | ||
8e8e676d | 1800 | spin_lock_bh(&ifp->lock); |
f2344a13 HX |
1801 | if (ifp->state == INET6_IFADDR_STATE_DAD) { |
1802 | ifp->state = INET6_IFADDR_STATE_POSTDAD; | |
1803 | err = 0; | |
1804 | } | |
8e8e676d | 1805 | spin_unlock_bh(&ifp->lock); |
f2344a13 HX |
1806 | |
1807 | return err; | |
1808 | } | |
1809 | ||
3c21edbd YH |
1810 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1811 | { | |
5f40ef77 | 1812 | struct in6_addr addr; |
1b34be74 | 1813 | struct inet6_dev *idev = ifp->idev; |
1855b7c3 | 1814 | struct net *net = dev_net(ifp->idev->dev); |
9bdd8d40 | 1815 | |
853dc2e0 UB |
1816 | if (addrconf_dad_end(ifp)) { |
1817 | in6_ifa_put(ifp); | |
f2344a13 | 1818 | return; |
853dc2e0 | 1819 | } |
f2344a13 | 1820 | |
e87cc472 JP |
1821 | net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n", |
1822 | ifp->idev->dev->name, &ifp->addr); | |
9bdd8d40 | 1823 | |
5f40ef77 HFS |
1824 | spin_lock_bh(&ifp->lock); |
1825 | ||
1826 | if (ifp->flags & IFA_F_STABLE_PRIVACY) { | |
1827 | int scope = ifp->scope; | |
1828 | u32 flags = ifp->flags; | |
1829 | struct in6_addr new_addr; | |
1830 | struct inet6_ifaddr *ifp2; | |
1831 | u32 valid_lft, preferred_lft; | |
1832 | int pfxlen = ifp->prefix_len; | |
5f40ef77 HFS |
1833 | int retries = ifp->stable_privacy_retry + 1; |
1834 | ||
1855b7c3 | 1835 | if (retries > net->ipv6.sysctl.idgen_retries) { |
5f40ef77 HFS |
1836 | net_info_ratelimited("%s: privacy stable address generation failed because of DAD conflicts!\n", |
1837 | ifp->idev->dev->name); | |
1838 | goto errdad; | |
1839 | } | |
1840 | ||
1841 | new_addr = ifp->addr; | |
1842 | if (ipv6_generate_stable_address(&new_addr, retries, | |
1843 | idev)) | |
1844 | goto errdad; | |
1845 | ||
1846 | valid_lft = ifp->valid_lft; | |
1847 | preferred_lft = ifp->prefered_lft; | |
1848 | ||
1849 | spin_unlock_bh(&ifp->lock); | |
1b34be74 | 1850 | |
5f40ef77 HFS |
1851 | if (idev->cnf.max_addresses && |
1852 | ipv6_count_addresses(idev) >= | |
1853 | idev->cnf.max_addresses) | |
1854 | goto lock_errdad; | |
1855 | ||
1856 | net_info_ratelimited("%s: generating new stable privacy address because of DAD conflict\n", | |
1857 | ifp->idev->dev->name); | |
1858 | ||
1859 | ifp2 = ipv6_add_addr(idev, &new_addr, NULL, pfxlen, | |
1860 | scope, flags, valid_lft, | |
1861 | preferred_lft); | |
1862 | if (IS_ERR(ifp2)) | |
1863 | goto lock_errdad; | |
1864 | ||
1865 | spin_lock_bh(&ifp2->lock); | |
1866 | ifp2->stable_privacy_retry = retries; | |
1867 | ifp2->state = INET6_IFADDR_STATE_PREDAD; | |
1868 | spin_unlock_bh(&ifp2->lock); | |
1869 | ||
1855b7c3 | 1870 | addrconf_mod_dad_work(ifp2, net->ipv6.sysctl.idgen_delay); |
5f40ef77 HFS |
1871 | in6_ifa_put(ifp2); |
1872 | lock_errdad: | |
1873 | spin_lock_bh(&ifp->lock); | |
1874 | } else if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) { | |
1b34be74 YH |
1875 | addr.s6_addr32[0] = htonl(0xfe800000); |
1876 | addr.s6_addr32[1] = 0; | |
1877 | ||
1878 | if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && | |
1879 | ipv6_addr_equal(&ifp->addr, &addr)) { | |
1880 | /* DAD failed for link-local based on MAC address */ | |
1881 | idev->cnf.disable_ipv6 = 1; | |
9bdd8d40 | 1882 | |
f3213831 | 1883 | pr_info("%s: IPv6 being disabled!\n", |
9bdd8d40 | 1884 | ifp->idev->dev->name); |
1b34be74 YH |
1885 | } |
1886 | } | |
1887 | ||
5f40ef77 | 1888 | errdad: |
c15b1cca HFS |
1889 | /* transition from _POSTDAD to _ERRDAD */ |
1890 | ifp->state = INET6_IFADDR_STATE_ERRDAD; | |
8e8e676d | 1891 | spin_unlock_bh(&ifp->lock); |
c15b1cca HFS |
1892 | |
1893 | addrconf_mod_dad_work(ifp, 0); | |
3c21edbd | 1894 | } |
1da177e4 | 1895 | |
a9ed4a29 SD |
1896 | /* Join to solicited addr multicast group. |
1897 | * caller must hold RTNL */ | |
b71d1d42 | 1898 | void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 LT |
1899 | { |
1900 | struct in6_addr maddr; | |
1901 | ||
1902 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1903 | return; | |
1904 | ||
1905 | addrconf_addr_solict_mult(addr, &maddr); | |
1906 | ipv6_dev_mc_inc(dev, &maddr); | |
1907 | } | |
1908 | ||
a9ed4a29 | 1909 | /* caller must hold RTNL */ |
b71d1d42 | 1910 | void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
1911 | { |
1912 | struct in6_addr maddr; | |
1913 | ||
1914 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1915 | return; | |
1916 | ||
1917 | addrconf_addr_solict_mult(addr, &maddr); | |
1918 | __ipv6_dev_mc_dec(idev, &maddr); | |
1919 | } | |
1920 | ||
a9ed4a29 | 1921 | /* caller must hold RTNL */ |
20380731 | 1922 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1923 | { |
1924 | struct in6_addr addr; | |
c15b1cca | 1925 | |
88ad3149 | 1926 | if (ifp->prefix_len >= 127) /* RFC 6164 */ |
2bda8a0c | 1927 | return; |
1da177e4 LT |
1928 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
1929 | if (ipv6_addr_any(&addr)) | |
1930 | return; | |
013b4d90 | 1931 | __ipv6_dev_ac_inc(ifp->idev, &addr); |
1da177e4 LT |
1932 | } |
1933 | ||
a9ed4a29 | 1934 | /* caller must hold RTNL */ |
20380731 | 1935 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1936 | { |
1937 | struct in6_addr addr; | |
c15b1cca | 1938 | |
88ad3149 | 1939 | if (ifp->prefix_len >= 127) /* RFC 6164 */ |
32019e65 | 1940 | return; |
1da177e4 LT |
1941 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
1942 | if (ipv6_addr_any(&addr)) | |
1943 | return; | |
1944 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1945 | } | |
1946 | ||
06a4c1c5 | 1947 | static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev) |
1948 | { | |
1949 | if (dev->addr_len != IEEE802154_ADDR_LEN) | |
1950 | return -1; | |
1951 | memcpy(eui, dev->dev_addr, 8); | |
5e98a36e | 1952 | eui[0] ^= 2; |
06a4c1c5 | 1953 | return 0; |
1954 | } | |
1955 | ||
cb6bf355 YH |
1956 | static int addrconf_ifid_ieee1394(u8 *eui, struct net_device *dev) |
1957 | { | |
1958 | union fwnet_hwaddr *ha; | |
1959 | ||
1960 | if (dev->addr_len != FWNET_ALEN) | |
1961 | return -1; | |
1962 | ||
1963 | ha = (union fwnet_hwaddr *)dev->dev_addr; | |
1964 | ||
1965 | memcpy(eui, &ha->uc.uniq_id, sizeof(ha->uc.uniq_id)); | |
1966 | eui[0] ^= 2; | |
1967 | return 0; | |
1968 | } | |
1969 | ||
073a8e0e YH |
1970 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) |
1971 | { | |
1972 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1973 | if (dev->addr_len != ARCNET_ALEN) | |
1974 | return -1; | |
1975 | memset(eui, 0, 7); | |
8e5e8f30 | 1976 | eui[7] = *(u8 *)dev->dev_addr; |
073a8e0e YH |
1977 | return 0; |
1978 | } | |
1979 | ||
1980 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1981 | { | |
1982 | if (dev->addr_len != INFINIBAND_ALEN) | |
1983 | return -1; | |
1984 | memcpy(eui, dev->dev_addr + 12, 8); | |
1985 | eui[0] |= 2; | |
1986 | return 0; | |
1987 | } | |
1988 | ||
c61393ea | 1989 | static int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
dfd982ba | 1990 | { |
9af28511 SH |
1991 | if (addr == 0) |
1992 | return -1; | |
dfd982ba YH |
1993 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || |
1994 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || | |
1995 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || | |
1996 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || | |
1997 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || | |
1998 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; | |
1999 | eui[1] = 0; | |
2000 | eui[2] = 0x5E; | |
2001 | eui[3] = 0xFE; | |
2002 | memcpy(eui + 4, &addr, 4); | |
2003 | return 0; | |
2004 | } | |
dfd982ba YH |
2005 | |
2006 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) | |
2007 | { | |
2008 | if (dev->priv_flags & IFF_ISATAP) | |
2009 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
2010 | return -1; | |
2011 | } | |
2012 | ||
aee80b54 | 2013 | static int addrconf_ifid_gre(u8 *eui, struct net_device *dev) |
2014 | { | |
2015 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
2016 | } | |
2017 | ||
e837735e ND |
2018 | static int addrconf_ifid_ip6tnl(u8 *eui, struct net_device *dev) |
2019 | { | |
2020 | memcpy(eui, dev->perm_addr, 3); | |
2021 | memcpy(eui + 5, dev->perm_addr + 3, 3); | |
2022 | eui[3] = 0xFF; | |
2023 | eui[4] = 0xFE; | |
2024 | eui[0] ^= 2; | |
2025 | return 0; | |
2026 | } | |
2027 | ||
1da177e4 LT |
2028 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
2029 | { | |
2030 | switch (dev->type) { | |
2031 | case ARPHRD_ETHER: | |
2032 | case ARPHRD_FDDI: | |
073a8e0e | 2033 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 2034 | case ARPHRD_ARCNET: |
073a8e0e | 2035 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 2036 | case ARPHRD_INFINIBAND: |
073a8e0e | 2037 | return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0 | 2038 | case ARPHRD_SIT: |
dfd982ba | 2039 | return addrconf_ifid_sit(eui, dev); |
aee80b54 | 2040 | case ARPHRD_IPGRE: |
2041 | return addrconf_ifid_gre(eui, dev); | |
e74bccb8 | 2042 | case ARPHRD_6LOWPAN: |
06a4c1c5 | 2043 | case ARPHRD_IEEE802154: |
2044 | return addrconf_ifid_eui64(eui, dev); | |
cb6bf355 YH |
2045 | case ARPHRD_IEEE1394: |
2046 | return addrconf_ifid_ieee1394(eui, dev); | |
e837735e ND |
2047 | case ARPHRD_TUNNEL6: |
2048 | return addrconf_ifid_ip6tnl(eui, dev); | |
1da177e4 LT |
2049 | } |
2050 | return -1; | |
2051 | } | |
2052 | ||
2053 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
2054 | { | |
2055 | int err = -1; | |
2056 | struct inet6_ifaddr *ifp; | |
2057 | ||
2058 | read_lock_bh(&idev->lock); | |
602582ca HFS |
2059 | list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) { |
2060 | if (ifp->scope > IFA_LINK) | |
2061 | break; | |
1da177e4 LT |
2062 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { |
2063 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
2064 | err = 0; | |
2065 | break; | |
2066 | } | |
2067 | } | |
2068 | read_unlock_bh(&idev->lock); | |
2069 | return err; | |
2070 | } | |
2071 | ||
1da177e4 | 2072 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ |
eb7e0575 | 2073 | static void __ipv6_regen_rndid(struct inet6_dev *idev) |
1da177e4 | 2074 | { |
1da177e4 | 2075 | regen: |
955189ef | 2076 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 2077 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
2078 | |
2079 | /* | |
2080 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
2081 | * check if generated address is not inappropriate | |
2082 | * | |
2083 | * - Reserved subnet anycast (RFC 2526) | |
2084 | * 11111101 11....11 1xxxxxxx | |
c7dc89c0 | 2085 | * - ISATAP (RFC4214) 6.1 |
1da177e4 LT |
2086 | * 00-00-5E-FE-xx-xx-xx-xx |
2087 | * - value 0 | |
2088 | * - XXX: already assigned to an address on the device | |
2089 | */ | |
1ab1457c | 2090 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
2091 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
2092 | (idev->rndid[7]&0x80)) | |
2093 | goto regen; | |
2094 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
2095 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
2096 | goto regen; | |
2097 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
2098 | goto regen; | |
2099 | } | |
1da177e4 LT |
2100 | } |
2101 | ||
2102 | static void ipv6_regen_rndid(unsigned long data) | |
2103 | { | |
2104 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
2105 | unsigned long expires; | |
2106 | ||
8814c4b5 | 2107 | rcu_read_lock_bh(); |
1da177e4 LT |
2108 | write_lock_bh(&idev->lock); |
2109 | ||
2110 | if (idev->dead) | |
2111 | goto out; | |
2112 | ||
eb7e0575 | 2113 | __ipv6_regen_rndid(idev); |
1ab1457c | 2114 | |
1da177e4 | 2115 | expires = jiffies + |
1ab1457c | 2116 | idev->cnf.temp_prefered_lft * HZ - |
1f9248e5 JP |
2117 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * |
2118 | NEIGH_VAR(idev->nd_parms, RETRANS_TIME) - | |
784e2710 | 2119 | idev->cnf.max_desync_factor * HZ; |
1da177e4 | 2120 | if (time_before(expires, jiffies)) { |
f3213831 JP |
2121 | pr_warn("%s: too short regeneration interval; timer disabled for %s\n", |
2122 | __func__, idev->dev->name); | |
1da177e4 LT |
2123 | goto out; |
2124 | } | |
2125 | ||
2126 | if (!mod_timer(&idev->regen_timer, expires)) | |
2127 | in6_dev_hold(idev); | |
2128 | ||
2129 | out: | |
2130 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 2131 | rcu_read_unlock_bh(); |
1da177e4 LT |
2132 | in6_dev_put(idev); |
2133 | } | |
2134 | ||
eb7e0575 | 2135 | static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) |
8e5e8f30 | 2136 | { |
1da177e4 | 2137 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) |
eb7e0575 | 2138 | __ipv6_regen_rndid(idev); |
1da177e4 | 2139 | } |
1da177e4 LT |
2140 | |
2141 | /* | |
2142 | * Add prefix route. | |
2143 | */ | |
2144 | ||
2145 | static void | |
2146 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 2147 | unsigned long expires, u32 flags) |
1da177e4 | 2148 | { |
86872cb5 | 2149 | struct fib6_config cfg = { |
ca254490 | 2150 | .fc_table = l3mdev_fib_table(dev) ? : RT6_TABLE_PREFIX, |
86872cb5 TG |
2151 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
2152 | .fc_ifindex = dev->ifindex, | |
2153 | .fc_expires = expires, | |
2154 | .fc_dst_len = plen, | |
2155 | .fc_flags = RTF_UP | flags, | |
c346dca1 | 2156 | .fc_nlinfo.nl_net = dev_net(dev), |
f410a1fb | 2157 | .fc_protocol = RTPROT_KERNEL, |
86872cb5 | 2158 | }; |
1da177e4 | 2159 | |
4e3fd7a0 | 2160 | cfg.fc_dst = *pfx; |
1da177e4 LT |
2161 | |
2162 | /* Prevent useless cloning on PtP SIT. | |
2163 | This thing is done here expecting that the whole | |
2164 | class of non-broadcast devices need not cloning. | |
2165 | */ | |
07a93626 | 2166 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
86872cb5 TG |
2167 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
2168 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 2169 | #endif |
1da177e4 | 2170 | |
86872cb5 | 2171 | ip6_route_add(&cfg); |
1da177e4 LT |
2172 | } |
2173 | ||
14ef37b6 AH |
2174 | |
2175 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, | |
2176 | int plen, | |
2177 | const struct net_device *dev, | |
2178 | u32 flags, u32 noflags) | |
2179 | { | |
2180 | struct fib6_node *fn; | |
2181 | struct rt6_info *rt = NULL; | |
2182 | struct fib6_table *table; | |
ca254490 | 2183 | u32 tb_id = l3mdev_fib_table(dev) ? : RT6_TABLE_PREFIX; |
14ef37b6 | 2184 | |
ca254490 | 2185 | table = fib6_get_table(dev_net(dev), tb_id); |
63159f29 | 2186 | if (!table) |
14ef37b6 AH |
2187 | return NULL; |
2188 | ||
5744dd9b | 2189 | read_lock_bh(&table->tb6_lock); |
14ef37b6 AH |
2190 | fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0); |
2191 | if (!fn) | |
2192 | goto out; | |
1f56a01f MKL |
2193 | |
2194 | noflags |= RTF_CACHE; | |
14ef37b6 | 2195 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { |
d1918542 | 2196 | if (rt->dst.dev->ifindex != dev->ifindex) |
14ef37b6 AH |
2197 | continue; |
2198 | if ((rt->rt6i_flags & flags) != flags) | |
2199 | continue; | |
85da53bf | 2200 | if ((rt->rt6i_flags & noflags) != 0) |
14ef37b6 AH |
2201 | continue; |
2202 | dst_hold(&rt->dst); | |
2203 | break; | |
2204 | } | |
2205 | out: | |
5744dd9b | 2206 | read_unlock_bh(&table->tb6_lock); |
14ef37b6 AH |
2207 | return rt; |
2208 | } | |
2209 | ||
2210 | ||
1da177e4 LT |
2211 | /* Create "default" multicast route to the interface */ |
2212 | ||
2213 | static void addrconf_add_mroute(struct net_device *dev) | |
2214 | { | |
86872cb5 | 2215 | struct fib6_config cfg = { |
ca254490 | 2216 | .fc_table = l3mdev_fib_table(dev) ? : RT6_TABLE_LOCAL, |
86872cb5 TG |
2217 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
2218 | .fc_ifindex = dev->ifindex, | |
2219 | .fc_dst_len = 8, | |
2220 | .fc_flags = RTF_UP, | |
c346dca1 | 2221 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 TG |
2222 | }; |
2223 | ||
2224 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
2225 | ||
2226 | ip6_route_add(&cfg); | |
1da177e4 LT |
2227 | } |
2228 | ||
1da177e4 LT |
2229 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) |
2230 | { | |
2231 | struct inet6_dev *idev; | |
2232 | ||
2233 | ASSERT_RTNL(); | |
2234 | ||
e21e8467 SH |
2235 | idev = ipv6_find_idev(dev); |
2236 | if (!idev) | |
64e724f6 BH |
2237 | return ERR_PTR(-ENOBUFS); |
2238 | ||
2239 | if (idev->cnf.disable_ipv6) | |
2240 | return ERR_PTR(-EACCES); | |
1da177e4 LT |
2241 | |
2242 | /* Add default multicast route */ | |
4af04aba LW |
2243 | if (!(dev->flags & IFF_LOOPBACK)) |
2244 | addrconf_add_mroute(dev); | |
1da177e4 | 2245 | |
1da177e4 LT |
2246 | return idev; |
2247 | } | |
2248 | ||
53bd6749 JP |
2249 | static void manage_tempaddrs(struct inet6_dev *idev, |
2250 | struct inet6_ifaddr *ifp, | |
2251 | __u32 valid_lft, __u32 prefered_lft, | |
2252 | bool create, unsigned long now) | |
2253 | { | |
2254 | u32 flags; | |
2255 | struct inet6_ifaddr *ift; | |
2256 | ||
2257 | read_lock_bh(&idev->lock); | |
2258 | /* update all temporary addresses in the list */ | |
2259 | list_for_each_entry(ift, &idev->tempaddr_list, tmp_list) { | |
2260 | int age, max_valid, max_prefered; | |
2261 | ||
2262 | if (ifp != ift->ifpub) | |
2263 | continue; | |
2264 | ||
2265 | /* RFC 4941 section 3.3: | |
2266 | * If a received option will extend the lifetime of a public | |
2267 | * address, the lifetimes of temporary addresses should | |
2268 | * be extended, subject to the overall constraint that no | |
2269 | * temporary addresses should ever remain "valid" or "preferred" | |
2270 | * for a time longer than (TEMP_VALID_LIFETIME) or | |
2271 | * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), respectively. | |
2272 | */ | |
2273 | age = (now - ift->cstamp) / HZ; | |
2274 | max_valid = idev->cnf.temp_valid_lft - age; | |
2275 | if (max_valid < 0) | |
2276 | max_valid = 0; | |
2277 | ||
2278 | max_prefered = idev->cnf.temp_prefered_lft - | |
2279 | idev->cnf.max_desync_factor - age; | |
2280 | if (max_prefered < 0) | |
2281 | max_prefered = 0; | |
2282 | ||
2283 | if (valid_lft > max_valid) | |
2284 | valid_lft = max_valid; | |
2285 | ||
2286 | if (prefered_lft > max_prefered) | |
2287 | prefered_lft = max_prefered; | |
2288 | ||
2289 | spin_lock(&ift->lock); | |
2290 | flags = ift->flags; | |
2291 | ift->valid_lft = valid_lft; | |
2292 | ift->prefered_lft = prefered_lft; | |
2293 | ift->tstamp = now; | |
2294 | if (prefered_lft > 0) | |
2295 | ift->flags &= ~IFA_F_DEPRECATED; | |
2296 | ||
2297 | spin_unlock(&ift->lock); | |
2298 | if (!(flags&IFA_F_TENTATIVE)) | |
2299 | ipv6_ifa_notify(0, ift); | |
2300 | } | |
2301 | ||
2302 | if ((create || list_empty(&idev->tempaddr_list)) && | |
2303 | idev->cnf.use_tempaddr > 0) { | |
2304 | /* When a new public address is created as described | |
2305 | * in [ADDRCONF], also create a new temporary address. | |
2306 | * Also create a temporary address if it's enabled but | |
2307 | * no temporary address currently exists. | |
2308 | */ | |
2309 | read_unlock_bh(&idev->lock); | |
2310 | ipv6_create_tempaddr(ifp, NULL); | |
2311 | } else { | |
2312 | read_unlock_bh(&idev->lock); | |
2313 | } | |
2314 | } | |
2315 | ||
e6bff995 | 2316 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao) |
1da177e4 LT |
2317 | { |
2318 | struct prefix_info *pinfo; | |
2319 | __u32 valid_lft; | |
2320 | __u32 prefered_lft; | |
2321 | int addr_type; | |
64236f3f | 2322 | u32 addr_flags = 0; |
1da177e4 | 2323 | struct inet6_dev *in6_dev; |
56d417b1 | 2324 | struct net *net = dev_net(dev); |
1da177e4 LT |
2325 | |
2326 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 2327 | |
1da177e4 | 2328 | if (len < sizeof(struct prefix_info)) { |
ba3542e1 | 2329 | ADBG("addrconf: prefix option too short\n"); |
1da177e4 LT |
2330 | return; |
2331 | } | |
1ab1457c | 2332 | |
1da177e4 LT |
2333 | /* |
2334 | * Validation checks ([ADDRCONF], page 19) | |
2335 | */ | |
2336 | ||
2337 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
2338 | ||
2339 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
2340 | return; | |
2341 | ||
2342 | valid_lft = ntohl(pinfo->valid); | |
2343 | prefered_lft = ntohl(pinfo->prefered); | |
2344 | ||
2345 | if (prefered_lft > valid_lft) { | |
e87cc472 | 2346 | net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n"); |
1da177e4 LT |
2347 | return; |
2348 | } | |
2349 | ||
2350 | in6_dev = in6_dev_get(dev); | |
2351 | ||
63159f29 | 2352 | if (!in6_dev) { |
e87cc472 JP |
2353 | net_dbg_ratelimited("addrconf: device %s not configured\n", |
2354 | dev->name); | |
1da177e4 LT |
2355 | return; |
2356 | } | |
2357 | ||
2358 | /* | |
2359 | * Two things going on here: | |
2360 | * 1) Add routes for on-link prefixes | |
2361 | * 2) Configure prefixes with the auto flag set | |
2362 | */ | |
2363 | ||
4bed72e4 YH |
2364 | if (pinfo->onlink) { |
2365 | struct rt6_info *rt; | |
2366 | unsigned long rt_expires; | |
2367 | ||
6f704992 YH |
2368 | /* Avoid arithmetic overflow. Really, we could |
2369 | * save rt_expires in seconds, likely valid_lft, | |
2370 | * but it would require division in fib gc, that it | |
2371 | * not good. | |
2372 | */ | |
4bed72e4 YH |
2373 | if (HZ > USER_HZ) |
2374 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); | |
2375 | else | |
2376 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); | |
3dd4bc68 | 2377 | |
4bed72e4 YH |
2378 | if (addrconf_finite_timeout(rt_expires)) |
2379 | rt_expires *= HZ; | |
1da177e4 | 2380 | |
14ef37b6 AH |
2381 | rt = addrconf_get_prefix_route(&pinfo->prefix, |
2382 | pinfo->prefix_len, | |
2383 | dev, | |
2384 | RTF_ADDRCONF | RTF_PREFIX_RT, | |
2385 | RTF_GATEWAY | RTF_DEFAULT); | |
1da177e4 | 2386 | |
14ef37b6 | 2387 | if (rt) { |
6f704992 YH |
2388 | /* Autoconf prefix route */ |
2389 | if (valid_lft == 0) { | |
2390 | ip6_del_rt(rt); | |
2391 | rt = NULL; | |
4bed72e4 | 2392 | } else if (addrconf_finite_timeout(rt_expires)) { |
6f704992 | 2393 | /* not infinity */ |
1716a961 | 2394 | rt6_set_expires(rt, jiffies + rt_expires); |
6f704992 | 2395 | } else { |
1716a961 | 2396 | rt6_clean_expires(rt); |
1da177e4 LT |
2397 | } |
2398 | } else if (valid_lft) { | |
6f704992 | 2399 | clock_t expires = 0; |
4bed72e4 YH |
2400 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
2401 | if (addrconf_finite_timeout(rt_expires)) { | |
6f704992 YH |
2402 | /* not infinity */ |
2403 | flags |= RTF_EXPIRES; | |
2404 | expires = jiffies_to_clock_t(rt_expires); | |
2405 | } | |
1da177e4 | 2406 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
6f704992 | 2407 | dev, expires, flags); |
1da177e4 | 2408 | } |
94e187c0 | 2409 | ip6_rt_put(rt); |
1da177e4 LT |
2410 | } |
2411 | ||
2412 | /* Try to figure out our local address for this prefix */ | |
2413 | ||
2414 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
8e5e8f30 | 2415 | struct inet6_ifaddr *ifp; |
1da177e4 LT |
2416 | struct in6_addr addr; |
2417 | int create = 0, update_lft = 0; | |
617fe29d | 2418 | bool tokenized = false; |
1da177e4 LT |
2419 | |
2420 | if (pinfo->prefix_len == 64) { | |
2421 | memcpy(&addr, &pinfo->prefix, 8); | |
f53adae4 DB |
2422 | |
2423 | if (!ipv6_addr_any(&in6_dev->token)) { | |
2424 | read_lock_bh(&in6_dev->lock); | |
2425 | memcpy(addr.s6_addr + 8, | |
2426 | in6_dev->token.s6_addr + 8, 8); | |
2427 | read_unlock_bh(&in6_dev->lock); | |
617fe29d | 2428 | tokenized = true; |
622c81d5 HFS |
2429 | } else if (in6_dev->addr_gen_mode == |
2430 | IN6_ADDR_GEN_MODE_STABLE_PRIVACY && | |
2431 | !ipv6_generate_stable_address(&addr, 0, | |
2432 | in6_dev)) { | |
64236f3f | 2433 | addr_flags |= IFA_F_STABLE_PRIVACY; |
622c81d5 | 2434 | goto ok; |
f53adae4 DB |
2435 | } else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && |
2436 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1da177e4 LT |
2437 | in6_dev_put(in6_dev); |
2438 | return; | |
2439 | } | |
2440 | goto ok; | |
2441 | } | |
e87cc472 JP |
2442 | net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n", |
2443 | pinfo->prefix_len); | |
1da177e4 LT |
2444 | in6_dev_put(in6_dev); |
2445 | return; | |
2446 | ||
2447 | ok: | |
2448 | ||
53b7997f | 2449 | ifp = ipv6_get_ifaddr(net, &addr, dev, 1); |
1da177e4 | 2450 | |
63159f29 | 2451 | if (!ifp && valid_lft) { |
1da177e4 | 2452 | int max_addresses = in6_dev->cnf.max_addresses; |
95c385b4 NH |
2453 | |
2454 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2455 | if (in6_dev->cnf.optimistic_dad && | |
e6bff995 | 2456 | !net->ipv6.devconf_all->forwarding && sllao) |
95c385b4 NH |
2457 | addr_flags = IFA_F_OPTIMISTIC; |
2458 | #endif | |
1da177e4 LT |
2459 | |
2460 | /* Do not allow to create too much of autoconfigured | |
2461 | * addresses; this would be too easy way to crash kernel. | |
2462 | */ | |
2463 | if (!max_addresses || | |
2464 | ipv6_count_addresses(in6_dev) < max_addresses) | |
3f8f5298 JP |
2465 | ifp = ipv6_add_addr(in6_dev, &addr, NULL, |
2466 | pinfo->prefix_len, | |
95c385b4 | 2467 | addr_type&IPV6_ADDR_SCOPE_MASK, |
8a226b2c JB |
2468 | addr_flags, valid_lft, |
2469 | prefered_lft); | |
1da177e4 | 2470 | |
3f0d2ba0 | 2471 | if (IS_ERR_OR_NULL(ifp)) { |
1da177e4 LT |
2472 | in6_dev_put(in6_dev); |
2473 | return; | |
2474 | } | |
2475 | ||
8a226b2c JB |
2476 | update_lft = 0; |
2477 | create = 1; | |
c15b1cca HFS |
2478 | spin_lock_bh(&ifp->lock); |
2479 | ifp->flags |= IFA_F_MANAGETEMPADDR; | |
1da177e4 | 2480 | ifp->cstamp = jiffies; |
617fe29d | 2481 | ifp->tokenized = tokenized; |
c15b1cca | 2482 | spin_unlock_bh(&ifp->lock); |
cf22f9a2 | 2483 | addrconf_dad_start(ifp); |
1da177e4 LT |
2484 | } |
2485 | ||
2486 | if (ifp) { | |
479840ff | 2487 | u32 flags; |
1da177e4 | 2488 | unsigned long now; |
1da177e4 LT |
2489 | u32 stored_lft; |
2490 | ||
2491 | /* update lifetime (RFC2462 5.5.3 e) */ | |
8e8e676d | 2492 | spin_lock_bh(&ifp->lock); |
1da177e4 LT |
2493 | now = jiffies; |
2494 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
2495 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
2496 | else | |
2497 | stored_lft = 0; | |
8a226b2c | 2498 | if (!update_lft && !create && stored_lft) { |
9451a304 FF |
2499 | const u32 minimum_lft = min_t(u32, |
2500 | stored_lft, MIN_VALID_LIFETIME); | |
c9d55d5b PM |
2501 | valid_lft = max(valid_lft, minimum_lft); |
2502 | ||
2503 | /* RFC4862 Section 5.5.3e: | |
2504 | * "Note that the preferred lifetime of the | |
2505 | * corresponding address is always reset to | |
2506 | * the Preferred Lifetime in the received | |
2507 | * Prefix Information option, regardless of | |
2508 | * whether the valid lifetime is also reset or | |
2509 | * ignored." | |
2510 | * | |
2511 | * So we should always update prefered_lft here. | |
2512 | */ | |
2513 | update_lft = 1; | |
1da177e4 LT |
2514 | } |
2515 | ||
2516 | if (update_lft) { | |
2517 | ifp->valid_lft = valid_lft; | |
2518 | ifp->prefered_lft = prefered_lft; | |
2519 | ifp->tstamp = now; | |
2520 | flags = ifp->flags; | |
2521 | ifp->flags &= ~IFA_F_DEPRECATED; | |
8e8e676d | 2522 | spin_unlock_bh(&ifp->lock); |
1da177e4 LT |
2523 | |
2524 | if (!(flags&IFA_F_TENTATIVE)) | |
2525 | ipv6_ifa_notify(0, ifp); | |
2526 | } else | |
8e8e676d | 2527 | spin_unlock_bh(&ifp->lock); |
1da177e4 | 2528 | |
53bd6749 JP |
2529 | manage_tempaddrs(in6_dev, ifp, valid_lft, prefered_lft, |
2530 | create, now); | |
5d9efa7e | 2531 | |
1da177e4 | 2532 | in6_ifa_put(ifp); |
c15b1cca | 2533 | addrconf_verify(); |
1da177e4 LT |
2534 | } |
2535 | } | |
2536 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
2537 | in6_dev_put(in6_dev); | |
2538 | } | |
2539 | ||
2540 | /* | |
2541 | * Set destination address. | |
2542 | * Special case for SIT interfaces where we create a new "virtual" | |
2543 | * device. | |
2544 | */ | |
af284937 | 2545 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2546 | { |
2547 | struct in6_ifreq ireq; | |
2548 | struct net_device *dev; | |
2549 | int err = -EINVAL; | |
2550 | ||
2551 | rtnl_lock(); | |
2552 | ||
2553 | err = -EFAULT; | |
2554 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2555 | goto err_exit; | |
2556 | ||
af284937 | 2557 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
1da177e4 LT |
2558 | |
2559 | err = -ENODEV; | |
63159f29 | 2560 | if (!dev) |
1da177e4 LT |
2561 | goto err_exit; |
2562 | ||
07a93626 | 2563 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 | 2564 | if (dev->type == ARPHRD_SIT) { |
5bc3eb7e | 2565 | const struct net_device_ops *ops = dev->netdev_ops; |
1da177e4 | 2566 | struct ifreq ifr; |
1da177e4 LT |
2567 | struct ip_tunnel_parm p; |
2568 | ||
2569 | err = -EADDRNOTAVAIL; | |
2570 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
2571 | goto err_exit; | |
2572 | ||
2573 | memset(&p, 0, sizeof(p)); | |
2574 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
2575 | p.iph.saddr = 0; | |
2576 | p.iph.version = 4; | |
2577 | p.iph.ihl = 5; | |
2578 | p.iph.protocol = IPPROTO_IPV6; | |
2579 | p.iph.ttl = 64; | |
d20b3109 | 2580 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 | 2581 | |
5bc3eb7e SH |
2582 | if (ops->ndo_do_ioctl) { |
2583 | mm_segment_t oldfs = get_fs(); | |
2584 | ||
2585 | set_fs(KERNEL_DS); | |
2586 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
2587 | set_fs(oldfs); | |
2588 | } else | |
2589 | err = -EOPNOTSUPP; | |
1da177e4 LT |
2590 | |
2591 | if (err == 0) { | |
2592 | err = -ENOBUFS; | |
af284937 DL |
2593 | dev = __dev_get_by_name(net, p.name); |
2594 | if (!dev) | |
1da177e4 LT |
2595 | goto err_exit; |
2596 | err = dev_open(dev); | |
2597 | } | |
2598 | } | |
0be669bb | 2599 | #endif |
1da177e4 LT |
2600 | |
2601 | err_exit: | |
2602 | rtnl_unlock(); | |
2603 | return err; | |
2604 | } | |
2605 | ||
93a714d6 MC |
2606 | static int ipv6_mc_config(struct sock *sk, bool join, |
2607 | const struct in6_addr *addr, int ifindex) | |
2608 | { | |
2609 | int ret; | |
2610 | ||
2611 | ASSERT_RTNL(); | |
2612 | ||
2613 | lock_sock(sk); | |
2614 | if (join) | |
54ff9ef3 | 2615 | ret = ipv6_sock_mc_join(sk, ifindex, addr); |
93a714d6 | 2616 | else |
54ff9ef3 | 2617 | ret = ipv6_sock_mc_drop(sk, ifindex, addr); |
93a714d6 MC |
2618 | release_sock(sk); |
2619 | ||
2620 | return ret; | |
2621 | } | |
2622 | ||
1da177e4 LT |
2623 | /* |
2624 | * Manual configuration of address on an interface | |
2625 | */ | |
479840ff JP |
2626 | static int inet6_addr_add(struct net *net, int ifindex, |
2627 | const struct in6_addr *pfx, | |
caeaba79 | 2628 | const struct in6_addr *peer_pfx, |
479840ff JP |
2629 | unsigned int plen, __u32 ifa_flags, |
2630 | __u32 prefered_lft, __u32 valid_lft) | |
1da177e4 LT |
2631 | { |
2632 | struct inet6_ifaddr *ifp; | |
2633 | struct inet6_dev *idev; | |
2634 | struct net_device *dev; | |
93a714d6 MC |
2635 | unsigned long timeout; |
2636 | clock_t expires; | |
1da177e4 | 2637 | int scope; |
6f704992 | 2638 | u32 flags; |
1da177e4 LT |
2639 | |
2640 | ASSERT_RTNL(); | |
1ab1457c | 2641 | |
24ef0da7 TG |
2642 | if (plen > 128) |
2643 | return -EINVAL; | |
2644 | ||
0778769d NT |
2645 | /* check the lifetime */ |
2646 | if (!valid_lft || prefered_lft > valid_lft) | |
2647 | return -EINVAL; | |
2648 | ||
53bd6749 JP |
2649 | if (ifa_flags & IFA_F_MANAGETEMPADDR && plen != 64) |
2650 | return -EINVAL; | |
2651 | ||
af284937 DL |
2652 | dev = __dev_get_by_index(net, ifindex); |
2653 | if (!dev) | |
1da177e4 | 2654 | return -ENODEV; |
1ab1457c | 2655 | |
64e724f6 BH |
2656 | idev = addrconf_add_dev(dev); |
2657 | if (IS_ERR(idev)) | |
2658 | return PTR_ERR(idev); | |
1da177e4 | 2659 | |
93a714d6 MC |
2660 | if (ifa_flags & IFA_F_MCAUTOJOIN) { |
2661 | int ret = ipv6_mc_config(net->ipv6.mc_autojoin_sk, | |
2662 | true, pfx, ifindex); | |
2663 | ||
2664 | if (ret < 0) | |
2665 | return ret; | |
2666 | } | |
2667 | ||
1da177e4 LT |
2668 | scope = ipv6_addr_scope(pfx); |
2669 | ||
4bed72e4 YH |
2670 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
2671 | if (addrconf_finite_timeout(timeout)) { | |
2672 | expires = jiffies_to_clock_t(timeout * HZ); | |
2673 | valid_lft = timeout; | |
6f704992 | 2674 | flags = RTF_EXPIRES; |
4bed72e4 YH |
2675 | } else { |
2676 | expires = 0; | |
2677 | flags = 0; | |
2678 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 2679 | } |
0778769d | 2680 | |
4bed72e4 YH |
2681 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
2682 | if (addrconf_finite_timeout(timeout)) { | |
2683 | if (timeout == 0) | |
2684 | ifa_flags |= IFA_F_DEPRECATED; | |
2685 | prefered_lft = timeout; | |
2686 | } | |
0778769d | 2687 | |
8a226b2c JB |
2688 | ifp = ipv6_add_addr(idev, pfx, peer_pfx, plen, scope, ifa_flags, |
2689 | valid_lft, prefered_lft); | |
0778769d | 2690 | |
1da177e4 | 2691 | if (!IS_ERR(ifp)) { |
761aac73 TH |
2692 | if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) { |
2693 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, | |
2694 | expires, flags); | |
2695 | } | |
2696 | ||
95c385b4 NH |
2697 | /* |
2698 | * Note that section 3.1 of RFC 4429 indicates | |
2699 | * that the Optimistic flag should not be set for | |
2700 | * manually configured addresses | |
2701 | */ | |
cf22f9a2 | 2702 | addrconf_dad_start(ifp); |
53bd6749 JP |
2703 | if (ifa_flags & IFA_F_MANAGETEMPADDR) |
2704 | manage_tempaddrs(idev, ifp, valid_lft, prefered_lft, | |
2705 | true, jiffies); | |
1da177e4 | 2706 | in6_ifa_put(ifp); |
c15b1cca | 2707 | addrconf_verify_rtnl(); |
1da177e4 | 2708 | return 0; |
93a714d6 MC |
2709 | } else if (ifa_flags & IFA_F_MCAUTOJOIN) { |
2710 | ipv6_mc_config(net->ipv6.mc_autojoin_sk, | |
2711 | false, pfx, ifindex); | |
1da177e4 LT |
2712 | } |
2713 | ||
2714 | return PTR_ERR(ifp); | |
2715 | } | |
2716 | ||
6046d5b4 HK |
2717 | static int inet6_addr_del(struct net *net, int ifindex, u32 ifa_flags, |
2718 | const struct in6_addr *pfx, unsigned int plen) | |
1da177e4 LT |
2719 | { |
2720 | struct inet6_ifaddr *ifp; | |
2721 | struct inet6_dev *idev; | |
2722 | struct net_device *dev; | |
1ab1457c | 2723 | |
24ef0da7 TG |
2724 | if (plen > 128) |
2725 | return -EINVAL; | |
2726 | ||
af284937 DL |
2727 | dev = __dev_get_by_index(net, ifindex); |
2728 | if (!dev) | |
1da177e4 LT |
2729 | return -ENODEV; |
2730 | ||
e5d08d71 | 2731 | idev = __in6_dev_get(dev); |
63159f29 | 2732 | if (!idev) |
1da177e4 LT |
2733 | return -ENXIO; |
2734 | ||
2735 | read_lock_bh(&idev->lock); | |
502a2ffd | 2736 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
2737 | if (ifp->prefix_len == plen && |
2738 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
2739 | in6_ifa_hold(ifp); | |
2740 | read_unlock_bh(&idev->lock); | |
1ab1457c | 2741 | |
6046d5b4 HK |
2742 | if (!(ifp->flags & IFA_F_TEMPORARY) && |
2743 | (ifa_flags & IFA_F_MANAGETEMPADDR)) | |
2744 | manage_tempaddrs(idev, ifp, 0, 0, false, | |
2745 | jiffies); | |
1da177e4 | 2746 | ipv6_del_addr(ifp); |
6046d5b4 | 2747 | addrconf_verify_rtnl(); |
93a714d6 MC |
2748 | if (ipv6_addr_is_multicast(pfx)) { |
2749 | ipv6_mc_config(net->ipv6.mc_autojoin_sk, | |
2750 | false, pfx, dev->ifindex); | |
2751 | } | |
1da177e4 LT |
2752 | return 0; |
2753 | } | |
2754 | } | |
2755 | read_unlock_bh(&idev->lock); | |
2756 | return -EADDRNOTAVAIL; | |
2757 | } | |
2758 | ||
2759 | ||
af284937 | 2760 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2761 | { |
2762 | struct in6_ifreq ireq; | |
2763 | int err; | |
1ab1457c | 2764 | |
af31f412 | 2765 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 | 2766 | return -EPERM; |
1ab1457c | 2767 | |
1da177e4 LT |
2768 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2769 | return -EFAULT; | |
2770 | ||
2771 | rtnl_lock(); | |
caeaba79 | 2772 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, NULL, |
af284937 DL |
2773 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, |
2774 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 LT |
2775 | rtnl_unlock(); |
2776 | return err; | |
2777 | } | |
2778 | ||
af284937 | 2779 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2780 | { |
2781 | struct in6_ifreq ireq; | |
2782 | int err; | |
1ab1457c | 2783 | |
af31f412 | 2784 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
2785 | return -EPERM; |
2786 | ||
2787 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2788 | return -EFAULT; | |
2789 | ||
2790 | rtnl_lock(); | |
6046d5b4 | 2791 | err = inet6_addr_del(net, ireq.ifr6_ifindex, 0, &ireq.ifr6_addr, |
af284937 | 2792 | ireq.ifr6_prefixlen); |
1da177e4 LT |
2793 | rtnl_unlock(); |
2794 | return err; | |
2795 | } | |
2796 | ||
b5f348e5 IJ |
2797 | static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
2798 | int plen, int scope) | |
2799 | { | |
2800 | struct inet6_ifaddr *ifp; | |
2801 | ||
8a226b2c | 2802 | ifp = ipv6_add_addr(idev, addr, NULL, plen, |
07edd741 HFS |
2803 | scope, IFA_F_PERMANENT, |
2804 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
b5f348e5 IJ |
2805 | if (!IS_ERR(ifp)) { |
2806 | spin_lock_bh(&ifp->lock); | |
2807 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2808 | spin_unlock_bh(&ifp->lock); | |
2809 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2810 | in6_ifa_put(ifp); | |
2811 | } | |
2812 | } | |
2813 | ||
07a93626 | 2814 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2815 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2816 | { | |
1da177e4 LT |
2817 | struct in6_addr addr; |
2818 | struct net_device *dev; | |
c346dca1 | 2819 | struct net *net = dev_net(idev->dev); |
929c9cf3 | 2820 | int scope, plen; |
f0e2acfa | 2821 | u32 pflags = 0; |
1da177e4 LT |
2822 | |
2823 | ASSERT_RTNL(); | |
2824 | ||
2825 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2826 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2827 | ||
2828 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2829 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2830 | scope = IFA_LINK; | |
929c9cf3 | 2831 | plen = 64; |
1da177e4 LT |
2832 | } else { |
2833 | scope = IPV6_ADDR_COMPATv4; | |
929c9cf3 | 2834 | plen = 96; |
f0e2acfa | 2835 | pflags |= RTF_NONEXTHOP; |
1da177e4 LT |
2836 | } |
2837 | ||
2838 | if (addr.s6_addr32[3]) { | |
929c9cf3 | 2839 | add_addr(idev, &addr, plen, scope); |
f0e2acfa | 2840 | addrconf_prefix_route(&addr, plen, idev->dev, 0, pflags); |
1da177e4 LT |
2841 | return; |
2842 | } | |
2843 | ||
6fda7350 | 2844 | for_each_netdev(net, dev) { |
8e5e8f30 | 2845 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 | 2846 | if (in_dev && (dev->flags & IFF_UP)) { |
8e5e8f30 | 2847 | struct in_ifaddr *ifa; |
1da177e4 LT |
2848 | |
2849 | int flag = scope; | |
2850 | ||
2851 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
1da177e4 LT |
2852 | |
2853 | addr.s6_addr32[3] = ifa->ifa_local; | |
2854 | ||
2855 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2856 | continue; | |
2857 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2858 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2859 | continue; | |
2860 | flag |= IFA_HOST; | |
2861 | } | |
1da177e4 | 2862 | |
b5f348e5 | 2863 | add_addr(idev, &addr, plen, flag); |
f0e2acfa ND |
2864 | addrconf_prefix_route(&addr, plen, idev->dev, 0, |
2865 | pflags); | |
1da177e4 LT |
2866 | } |
2867 | } | |
1ab1457c | 2868 | } |
1da177e4 | 2869 | } |
0be669bb | 2870 | #endif |
1da177e4 LT |
2871 | |
2872 | static void init_loopback(struct net_device *dev) | |
2873 | { | |
2874 | struct inet6_dev *idev; | |
25fb6ca4 BK |
2875 | struct net_device *sp_dev; |
2876 | struct inet6_ifaddr *sp_ifa; | |
2877 | struct rt6_info *sp_rt; | |
1da177e4 LT |
2878 | |
2879 | /* ::1 */ | |
2880 | ||
2881 | ASSERT_RTNL(); | |
2882 | ||
e5d08d71 | 2883 | idev = ipv6_find_idev(dev); |
63159f29 | 2884 | if (!idev) { |
91df42be | 2885 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
2886 | return; |
2887 | } | |
2888 | ||
b5f348e5 | 2889 | add_addr(idev, &in6addr_loopback, 128, IFA_HOST); |
25fb6ca4 BK |
2890 | |
2891 | /* Add routes to other interface's IPv6 addresses */ | |
2892 | for_each_netdev(dev_net(dev), sp_dev) { | |
2893 | if (!strcmp(sp_dev->name, dev->name)) | |
2894 | continue; | |
2895 | ||
2896 | idev = __in6_dev_get(sp_dev); | |
2897 | if (!idev) | |
2898 | continue; | |
2899 | ||
2900 | read_lock_bh(&idev->lock); | |
2901 | list_for_each_entry(sp_ifa, &idev->addr_list, if_list) { | |
2902 | ||
2903 | if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE)) | |
2904 | continue; | |
2905 | ||
33d99113 G |
2906 | if (sp_ifa->rt) { |
2907 | /* This dst has been added to garbage list when | |
2908 | * lo device down, release this obsolete dst and | |
2909 | * reallocate a new router for ifa. | |
2910 | */ | |
2911 | if (sp_ifa->rt->dst.obsolete > 0) { | |
2912 | ip6_rt_put(sp_ifa->rt); | |
2913 | sp_ifa->rt = NULL; | |
2914 | } else { | |
2915 | continue; | |
2916 | } | |
2917 | } | |
a881ae1f | 2918 | |
57ec0afe | 2919 | sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, false); |
25fb6ca4 BK |
2920 | |
2921 | /* Failure cases are ignored */ | |
534c8779 G |
2922 | if (!IS_ERR(sp_rt)) { |
2923 | sp_ifa->rt = sp_rt; | |
25fb6ca4 | 2924 | ip6_ins_rt(sp_rt); |
534c8779 | 2925 | } |
25fb6ca4 BK |
2926 | } |
2927 | read_unlock_bh(&idev->lock); | |
2928 | } | |
1da177e4 LT |
2929 | } |
2930 | ||
64236f3f HFS |
2931 | static void addrconf_add_linklocal(struct inet6_dev *idev, |
2932 | const struct in6_addr *addr, u32 flags) | |
1da177e4 | 2933 | { |
8e5e8f30 | 2934 | struct inet6_ifaddr *ifp; |
64236f3f | 2935 | u32 addr_flags = flags | IFA_F_PERMANENT; |
95c385b4 NH |
2936 | |
2937 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2938 | if (idev->cnf.optimistic_dad && | |
702beb87 | 2939 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
95c385b4 NH |
2940 | addr_flags |= IFA_F_OPTIMISTIC; |
2941 | #endif | |
1da177e4 | 2942 | |
07edd741 HFS |
2943 | ifp = ipv6_add_addr(idev, addr, NULL, 64, IFA_LINK, addr_flags, |
2944 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 | 2945 | if (!IS_ERR(ifp)) { |
46d48046 | 2946 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
cf22f9a2 | 2947 | addrconf_dad_start(ifp); |
1da177e4 LT |
2948 | in6_ifa_put(ifp); |
2949 | } | |
2950 | } | |
2951 | ||
622c81d5 HFS |
2952 | static bool ipv6_reserved_interfaceid(struct in6_addr address) |
2953 | { | |
2954 | if ((address.s6_addr32[2] | address.s6_addr32[3]) == 0) | |
2955 | return true; | |
2956 | ||
2957 | if (address.s6_addr32[2] == htonl(0x02005eff) && | |
2958 | ((address.s6_addr32[3] & htonl(0xfe000000)) == htonl(0xfe000000))) | |
2959 | return true; | |
2960 | ||
2961 | if (address.s6_addr32[2] == htonl(0xfdffffff) && | |
2962 | ((address.s6_addr32[3] & htonl(0xffffff80)) == htonl(0xffffff80))) | |
2963 | return true; | |
2964 | ||
2965 | return false; | |
2966 | } | |
2967 | ||
2968 | static int ipv6_generate_stable_address(struct in6_addr *address, | |
2969 | u8 dad_count, | |
2970 | const struct inet6_dev *idev) | |
2971 | { | |
622c81d5 HFS |
2972 | static DEFINE_SPINLOCK(lock); |
2973 | static __u32 digest[SHA_DIGEST_WORDS]; | |
2974 | static __u32 workspace[SHA_WORKSPACE_WORDS]; | |
2975 | ||
2976 | static union { | |
2977 | char __data[SHA_MESSAGE_BYTES]; | |
2978 | struct { | |
2979 | struct in6_addr secret; | |
ff40217e | 2980 | __be32 prefix[2]; |
622c81d5 HFS |
2981 | unsigned char hwaddr[MAX_ADDR_LEN]; |
2982 | u8 dad_count; | |
2983 | } __packed; | |
2984 | } data; | |
2985 | ||
2986 | struct in6_addr secret; | |
2987 | struct in6_addr temp; | |
2988 | struct net *net = dev_net(idev->dev); | |
2989 | ||
2990 | BUILD_BUG_ON(sizeof(data.__data) != sizeof(data)); | |
2991 | ||
2992 | if (idev->cnf.stable_secret.initialized) | |
2993 | secret = idev->cnf.stable_secret.secret; | |
2994 | else if (net->ipv6.devconf_dflt->stable_secret.initialized) | |
2995 | secret = net->ipv6.devconf_dflt->stable_secret.secret; | |
2996 | else | |
2997 | return -1; | |
2998 | ||
2999 | retry: | |
3000 | spin_lock_bh(&lock); | |
3001 | ||
3002 | sha_init(digest); | |
3003 | memset(&data, 0, sizeof(data)); | |
3004 | memset(workspace, 0, sizeof(workspace)); | |
3005 | memcpy(data.hwaddr, idev->dev->perm_addr, idev->dev->addr_len); | |
ff40217e HFS |
3006 | data.prefix[0] = address->s6_addr32[0]; |
3007 | data.prefix[1] = address->s6_addr32[1]; | |
622c81d5 HFS |
3008 | data.secret = secret; |
3009 | data.dad_count = dad_count; | |
3010 | ||
3011 | sha_transform(digest, data.__data, workspace); | |
3012 | ||
3013 | temp = *address; | |
ff40217e HFS |
3014 | temp.s6_addr32[2] = (__force __be32)digest[0]; |
3015 | temp.s6_addr32[3] = (__force __be32)digest[1]; | |
622c81d5 HFS |
3016 | |
3017 | spin_unlock_bh(&lock); | |
3018 | ||
3019 | if (ipv6_reserved_interfaceid(temp)) { | |
3020 | dad_count++; | |
1855b7c3 | 3021 | if (dad_count > dev_net(idev->dev)->ipv6.sysctl.idgen_retries) |
622c81d5 HFS |
3022 | return -1; |
3023 | goto retry; | |
3024 | } | |
3025 | ||
3026 | *address = temp; | |
3027 | return 0; | |
3028 | } | |
3029 | ||
bc91b0f0 JP |
3030 | static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route) |
3031 | { | |
622c81d5 HFS |
3032 | struct in6_addr addr; |
3033 | ||
ca254490 DA |
3034 | /* no link local addresses on L3 master devices */ |
3035 | if (netif_is_l3_master(idev->dev)) | |
3036 | return; | |
3037 | ||
622c81d5 | 3038 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); |
bc91b0f0 | 3039 | |
622c81d5 HFS |
3040 | if (idev->addr_gen_mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY) { |
3041 | if (!ipv6_generate_stable_address(&addr, 0, idev)) | |
64236f3f HFS |
3042 | addrconf_add_linklocal(idev, &addr, |
3043 | IFA_F_STABLE_PRIVACY); | |
622c81d5 HFS |
3044 | else if (prefix_route) |
3045 | addrconf_prefix_route(&addr, 64, idev->dev, 0, 0); | |
3046 | } else if (idev->addr_gen_mode == IN6_ADDR_GEN_MODE_EUI64) { | |
bc91b0f0 JP |
3047 | /* addrconf_add_linklocal also adds a prefix_route and we |
3048 | * only need to care about prefix routes if ipv6_generate_eui64 | |
3049 | * couldn't generate one. | |
3050 | */ | |
3051 | if (ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) == 0) | |
64236f3f | 3052 | addrconf_add_linklocal(idev, &addr, 0); |
bc91b0f0 JP |
3053 | else if (prefix_route) |
3054 | addrconf_prefix_route(&addr, 64, idev->dev, 0, 0); | |
3055 | } | |
3056 | } | |
3057 | ||
1da177e4 LT |
3058 | static void addrconf_dev_config(struct net_device *dev) |
3059 | { | |
8e5e8f30 | 3060 | struct inet6_dev *idev; |
1da177e4 LT |
3061 | |
3062 | ASSERT_RTNL(); | |
3063 | ||
74235a25 HX |
3064 | if ((dev->type != ARPHRD_ETHER) && |
3065 | (dev->type != ARPHRD_FDDI) && | |
74235a25 | 3066 | (dev->type != ARPHRD_ARCNET) && |
06a4c1c5 | 3067 | (dev->type != ARPHRD_INFINIBAND) && |
cb6bf355 | 3068 | (dev->type != ARPHRD_IEEE802154) && |
e837735e | 3069 | (dev->type != ARPHRD_IEEE1394) && |
e74bccb8 JR |
3070 | (dev->type != ARPHRD_TUNNEL6) && |
3071 | (dev->type != ARPHRD_6LOWPAN)) { | |
74235a25 HX |
3072 | /* Alas, we support only Ethernet autoconfiguration. */ |
3073 | return; | |
3074 | } | |
3075 | ||
1da177e4 | 3076 | idev = addrconf_add_dev(dev); |
64e724f6 | 3077 | if (IS_ERR(idev)) |
1da177e4 LT |
3078 | return; |
3079 | ||
bc91b0f0 | 3080 | addrconf_addr_gen(idev, false); |
1da177e4 LT |
3081 | } |
3082 | ||
07a93626 | 3083 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
3084 | static void addrconf_sit_config(struct net_device *dev) |
3085 | { | |
3086 | struct inet6_dev *idev; | |
3087 | ||
3088 | ASSERT_RTNL(); | |
3089 | ||
1ab1457c YH |
3090 | /* |
3091 | * Configure the tunnel with one of our IPv4 | |
3092 | * addresses... we should configure all of | |
1da177e4 LT |
3093 | * our v4 addrs in the tunnel |
3094 | */ | |
3095 | ||
e5d08d71 | 3096 | idev = ipv6_find_idev(dev); |
63159f29 | 3097 | if (!idev) { |
91df42be | 3098 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
3099 | return; |
3100 | } | |
3101 | ||
c7dc89c0 | 3102 | if (dev->priv_flags & IFF_ISATAP) { |
bc91b0f0 | 3103 | addrconf_addr_gen(idev, false); |
c7dc89c0 FT |
3104 | return; |
3105 | } | |
3106 | ||
1da177e4 LT |
3107 | sit_add_v4_addrs(idev); |
3108 | ||
62b54dd9 | 3109 | if (dev->flags&IFF_POINTOPOINT) |
1da177e4 | 3110 | addrconf_add_mroute(dev); |
1da177e4 | 3111 | } |
0be669bb | 3112 | #endif |
1da177e4 | 3113 | |
07a93626 | 3114 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
aee80b54 | 3115 | static void addrconf_gre_config(struct net_device *dev) |
3116 | { | |
3117 | struct inet6_dev *idev; | |
aee80b54 | 3118 | |
aee80b54 | 3119 | ASSERT_RTNL(); |
3120 | ||
e5d08d71 | 3121 | idev = ipv6_find_idev(dev); |
63159f29 | 3122 | if (!idev) { |
91df42be | 3123 | pr_debug("%s: add_dev failed\n", __func__); |
aee80b54 | 3124 | return; |
3125 | } | |
3126 | ||
bc91b0f0 | 3127 | addrconf_addr_gen(idev, true); |
d9e4ce65 HFS |
3128 | if (dev->flags & IFF_POINTOPOINT) |
3129 | addrconf_add_mroute(dev); | |
aee80b54 | 3130 | } |
3131 | #endif | |
3132 | ||
1ab1457c | 3133 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
351638e7 | 3134 | void *ptr) |
1da177e4 | 3135 | { |
351638e7 | 3136 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
748e2d93 | 3137 | struct inet6_dev *idev = __in6_dev_get(dev); |
c5e33bdd | 3138 | int run_pending = 0; |
b217d616 | 3139 | int err; |
1da177e4 | 3140 | |
e21e8467 | 3141 | switch (event) { |
45ba9dd2 | 3142 | case NETDEV_REGISTER: |
74235a25 | 3143 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 | 3144 | idev = ipv6_add_dev(dev); |
a317a2f1 WC |
3145 | if (IS_ERR(idev)) |
3146 | return notifier_from_errno(PTR_ERR(idev)); | |
45ba9dd2 YH |
3147 | } |
3148 | break; | |
bcdd553f | 3149 | |
1da177e4 | 3150 | case NETDEV_UP: |
3c21edbd | 3151 | case NETDEV_CHANGE: |
c2edacf8 JV |
3152 | if (dev->flags & IFF_SLAVE) |
3153 | break; | |
3154 | ||
3ce62a84 WC |
3155 | if (idev && idev->cnf.disable_ipv6) |
3156 | break; | |
3157 | ||
3c21edbd | 3158 | if (event == NETDEV_UP) { |
f24e3d65 | 3159 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd | 3160 | /* device is not ready yet. */ |
f3213831 | 3161 | pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n", |
3c21edbd YH |
3162 | dev->name); |
3163 | break; | |
3164 | } | |
99081049 | 3165 | |
d31c7b8f EP |
3166 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
3167 | idev = ipv6_add_dev(dev); | |
3168 | ||
a317a2f1 | 3169 | if (!IS_ERR_OR_NULL(idev)) { |
99081049 | 3170 | idev->if_flags |= IF_READY; |
e3ec6cfc BT |
3171 | run_pending = 1; |
3172 | } | |
3c21edbd | 3173 | } else { |
f24e3d65 | 3174 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
3175 | /* device is still not ready. */ |
3176 | break; | |
3177 | } | |
3178 | ||
3179 | if (idev) { | |
bcdd553f | 3180 | if (idev->if_flags & IF_READY) |
3c21edbd YH |
3181 | /* device is already configured. */ |
3182 | break; | |
3c21edbd YH |
3183 | idev->if_flags |= IF_READY; |
3184 | } | |
3185 | ||
f3213831 JP |
3186 | pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n", |
3187 | dev->name); | |
3c21edbd | 3188 | |
c5e33bdd | 3189 | run_pending = 1; |
3c21edbd YH |
3190 | } |
3191 | ||
e21e8467 | 3192 | switch (dev->type) { |
07a93626 | 3193 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
3194 | case ARPHRD_SIT: |
3195 | addrconf_sit_config(dev); | |
3196 | break; | |
aee80b54 | 3197 | #endif |
07a93626 | 3198 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
aee80b54 | 3199 | case ARPHRD_IPGRE: |
3200 | addrconf_gre_config(dev); | |
3201 | break; | |
0be669bb | 3202 | #endif |
1da177e4 LT |
3203 | case ARPHRD_LOOPBACK: |
3204 | init_loopback(dev); | |
3205 | break; | |
3206 | ||
3207 | default: | |
3208 | addrconf_dev_config(dev); | |
3209 | break; | |
3ff50b79 | 3210 | } |
bcdd553f | 3211 | |
a317a2f1 | 3212 | if (!IS_ERR_OR_NULL(idev)) { |
c5e33bdd YH |
3213 | if (run_pending) |
3214 | addrconf_dad_run(idev); | |
3215 | ||
bcdd553f SH |
3216 | /* |
3217 | * If the MTU changed during the interface down, | |
3218 | * when the interface up, the changed MTU must be | |
3219 | * reflected in the idev as well as routers. | |
1da177e4 | 3220 | */ |
bcdd553f SH |
3221 | if (idev->cnf.mtu6 != dev->mtu && |
3222 | dev->mtu >= IPV6_MIN_MTU) { | |
1da177e4 LT |
3223 | rt6_mtu_change(dev, dev->mtu); |
3224 | idev->cnf.mtu6 = dev->mtu; | |
3225 | } | |
3226 | idev->tstamp = jiffies; | |
3227 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
bcdd553f SH |
3228 | |
3229 | /* | |
3230 | * If the changed mtu during down is lower than | |
3231 | * IPV6_MIN_MTU stop IPv6 on this interface. | |
1da177e4 LT |
3232 | */ |
3233 | if (dev->mtu < IPV6_MIN_MTU) | |
bcdd553f | 3234 | addrconf_ifdown(dev, 1); |
1da177e4 LT |
3235 | } |
3236 | break; | |
3237 | ||
3238 | case NETDEV_CHANGEMTU: | |
d31c7b8f | 3239 | if (idev && dev->mtu >= IPV6_MIN_MTU) { |
1da177e4 LT |
3240 | rt6_mtu_change(dev, dev->mtu); |
3241 | idev->cnf.mtu6 = dev->mtu; | |
3242 | break; | |
3243 | } | |
3244 | ||
d31c7b8f EP |
3245 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
3246 | idev = ipv6_add_dev(dev); | |
a317a2f1 | 3247 | if (!IS_ERR(idev)) |
d31c7b8f EP |
3248 | break; |
3249 | } | |
3250 | ||
bcdd553f | 3251 | /* |
db9c7c39 | 3252 | * if MTU under IPV6_MIN_MTU. |
bcdd553f SH |
3253 | * Stop IPv6 on this interface. |
3254 | */ | |
1da177e4 LT |
3255 | |
3256 | case NETDEV_DOWN: | |
3257 | case NETDEV_UNREGISTER: | |
3258 | /* | |
3259 | * Remove all addresses from this interface. | |
3260 | */ | |
3261 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
3262 | break; | |
3c21edbd | 3263 | |
1da177e4 | 3264 | case NETDEV_CHANGENAME: |
1da177e4 | 3265 | if (idev) { |
5632c515 | 3266 | snmp6_unregister_dev(idev); |
408c4768 | 3267 | addrconf_sysctl_unregister(idev); |
a317a2f1 | 3268 | err = addrconf_sysctl_register(idev); |
b217d616 HX |
3269 | if (err) |
3270 | return notifier_from_errno(err); | |
a317a2f1 WC |
3271 | err = snmp6_register_dev(idev); |
3272 | if (err) { | |
3273 | addrconf_sysctl_unregister(idev); | |
3274 | return notifier_from_errno(err); | |
3275 | } | |
5632c515 | 3276 | } |
1da177e4 | 3277 | break; |
bcdd553f | 3278 | |
93d9b7d7 JP |
3279 | case NETDEV_PRE_TYPE_CHANGE: |
3280 | case NETDEV_POST_TYPE_CHANGE: | |
3281 | addrconf_type_change(dev, event); | |
75c78500 | 3282 | break; |
3ff50b79 | 3283 | } |
1da177e4 LT |
3284 | |
3285 | return NOTIFY_OK; | |
3286 | } | |
3287 | ||
3288 | /* | |
3289 | * addrconf module should be notified of a device going up | |
3290 | */ | |
3291 | static struct notifier_block ipv6_dev_notf = { | |
3292 | .notifier_call = addrconf_notify, | |
1da177e4 LT |
3293 | }; |
3294 | ||
93d9b7d7 | 3295 | static void addrconf_type_change(struct net_device *dev, unsigned long event) |
75c78500 MS |
3296 | { |
3297 | struct inet6_dev *idev; | |
3298 | ASSERT_RTNL(); | |
3299 | ||
3300 | idev = __in6_dev_get(dev); | |
3301 | ||
93d9b7d7 | 3302 | if (event == NETDEV_POST_TYPE_CHANGE) |
75c78500 | 3303 | ipv6_mc_remap(idev); |
93d9b7d7 | 3304 | else if (event == NETDEV_PRE_TYPE_CHANGE) |
75c78500 MS |
3305 | ipv6_mc_unmap(idev); |
3306 | } | |
3307 | ||
1da177e4 LT |
3308 | static int addrconf_ifdown(struct net_device *dev, int how) |
3309 | { | |
c346dca1 | 3310 | struct net *net = dev_net(dev); |
502a2ffd | 3311 | struct inet6_dev *idev; |
3312 | struct inet6_ifaddr *ifa; | |
73a8bd74 | 3313 | int state, i; |
1da177e4 LT |
3314 | |
3315 | ASSERT_RTNL(); | |
3316 | ||
73a8bd74 DM |
3317 | rt6_ifdown(net, dev); |
3318 | neigh_ifdown(&nd_tbl, dev); | |
1da177e4 LT |
3319 | |
3320 | idev = __in6_dev_get(dev); | |
63159f29 | 3321 | if (!idev) |
1da177e4 LT |
3322 | return -ENODEV; |
3323 | ||
bcdd553f SH |
3324 | /* |
3325 | * Step 1: remove reference to ipv6 device from parent device. | |
3326 | * Do not dev_put! | |
1da177e4 | 3327 | */ |
439e2385 | 3328 | if (how) { |
1da177e4 | 3329 | idev->dead = 1; |
8814c4b5 YH |
3330 | |
3331 | /* protected by rtnl_lock */ | |
a9b3cd7f | 3332 | RCU_INIT_POINTER(dev->ip6_ptr, NULL); |
1da177e4 LT |
3333 | |
3334 | /* Step 1.5: remove snmp6 entry */ | |
3335 | snmp6_unregister_dev(idev); | |
3336 | ||
3337 | } | |
3338 | ||
73a8bd74 DM |
3339 | /* Step 2: clear hash table */ |
3340 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { | |
3341 | struct hlist_head *h = &inet6_addr_lst[i]; | |
73a8bd74 DM |
3342 | |
3343 | spin_lock_bh(&addrconf_hash_lock); | |
67ba4152 | 3344 | restart: |
b67bfe0d | 3345 | hlist_for_each_entry_rcu(ifa, h, addr_lst) { |
73a8bd74 DM |
3346 | if (ifa->idev == idev) { |
3347 | hlist_del_init_rcu(&ifa->addr_lst); | |
c15b1cca | 3348 | addrconf_del_dad_work(ifa); |
73a8bd74 DM |
3349 | goto restart; |
3350 | } | |
3351 | } | |
3352 | spin_unlock_bh(&addrconf_hash_lock); | |
3353 | } | |
3354 | ||
1da177e4 LT |
3355 | write_lock_bh(&idev->lock); |
3356 | ||
b7b1bfce HFS |
3357 | addrconf_del_rs_timer(idev); |
3358 | ||
bcdd553f | 3359 | /* Step 2: clear flags for stateless addrconf */ |
439e2385 | 3360 | if (!how) |
3c21edbd | 3361 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 | 3362 | |
439e2385 | 3363 | if (how && del_timer(&idev->regen_timer)) |
1da177e4 LT |
3364 | in6_dev_put(idev); |
3365 | ||
bcdd553f | 3366 | /* Step 3: clear tempaddr list */ |
372e6c8f | 3367 | while (!list_empty(&idev->tempaddr_list)) { |
3368 | ifa = list_first_entry(&idev->tempaddr_list, | |
3369 | struct inet6_ifaddr, tmp_list); | |
3370 | list_del(&ifa->tmp_list); | |
1da177e4 LT |
3371 | write_unlock_bh(&idev->lock); |
3372 | spin_lock_bh(&ifa->lock); | |
3373 | ||
3374 | if (ifa->ifpub) { | |
3375 | in6_ifa_put(ifa->ifpub); | |
3376 | ifa->ifpub = NULL; | |
3377 | } | |
3378 | spin_unlock_bh(&ifa->lock); | |
3379 | in6_ifa_put(ifa); | |
3380 | write_lock_bh(&idev->lock); | |
3381 | } | |
8f37ada5 | 3382 | |
502a2ffd | 3383 | while (!list_empty(&idev->addr_list)) { |
3384 | ifa = list_first_entry(&idev->addr_list, | |
3385 | struct inet6_ifaddr, if_list); | |
c15b1cca | 3386 | addrconf_del_dad_work(ifa); |
84e8b803 | 3387 | |
73a8bd74 | 3388 | list_del(&ifa->if_list); |
84e8b803 | 3389 | |
73a8bd74 | 3390 | write_unlock_bh(&idev->lock); |
84e8b803 | 3391 | |
8e8e676d | 3392 | spin_lock_bh(&ifa->lock); |
73a8bd74 DM |
3393 | state = ifa->state; |
3394 | ifa->state = INET6_IFADDR_STATE_DEAD; | |
8e8e676d | 3395 | spin_unlock_bh(&ifa->lock); |
9d82ca98 | 3396 | |
73a8bd74 DM |
3397 | if (state != INET6_IFADDR_STATE_DEAD) { |
3398 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
f88c91dd | 3399 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifa); |
27bdb2ab | 3400 | } |
73a8bd74 | 3401 | in6_ifa_put(ifa); |
8f37ada5 | 3402 | |
73a8bd74 DM |
3403 | write_lock_bh(&idev->lock); |
3404 | } | |
8f37ada5 | 3405 | |
1da177e4 LT |
3406 | write_unlock_bh(&idev->lock); |
3407 | ||
381f4dca SD |
3408 | /* Step 5: Discard anycast and multicast list */ |
3409 | if (how) { | |
3410 | ipv6_ac_destroy_dev(idev); | |
1da177e4 | 3411 | ipv6_mc_destroy_dev(idev); |
381f4dca | 3412 | } else { |
1da177e4 | 3413 | ipv6_mc_down(idev); |
381f4dca | 3414 | } |
1da177e4 | 3415 | |
1da177e4 | 3416 | idev->tstamp = jiffies; |
1ab1457c | 3417 | |
bcdd553f | 3418 | /* Last: Shot the device (if unregistered) */ |
439e2385 | 3419 | if (how) { |
408c4768 | 3420 | addrconf_sysctl_unregister(idev); |
1da177e4 LT |
3421 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
3422 | neigh_ifdown(&nd_tbl, dev); | |
3423 | in6_dev_put(idev); | |
3424 | } | |
3425 | return 0; | |
3426 | } | |
3427 | ||
3428 | static void addrconf_rs_timer(unsigned long data) | |
3429 | { | |
b7b1bfce | 3430 | struct inet6_dev *idev = (struct inet6_dev *)data; |
caf92bc4 | 3431 | struct net_device *dev = idev->dev; |
b7b1bfce | 3432 | struct in6_addr lladdr; |
1da177e4 | 3433 | |
b7b1bfce | 3434 | write_lock(&idev->lock); |
5b2a1953 | 3435 | if (idev->dead || !(idev->if_flags & IF_READY)) |
1da177e4 LT |
3436 | goto out; |
3437 | ||
9ba2add3 | 3438 | if (!ipv6_accept_ra(idev)) |
5b2a1953 | 3439 | goto out; |
3440 | ||
3441 | /* Announcement received after solicitation was sent */ | |
3442 | if (idev->if_flags & IF_RA_RCVD) | |
1da177e4 | 3443 | goto out; |
1da177e4 | 3444 | |
b7b1bfce | 3445 | if (idev->rs_probes++ < idev->cnf.rtr_solicits) { |
caf92bc4 CW |
3446 | write_unlock(&idev->lock); |
3447 | if (!ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) | |
3448 | ndisc_send_rs(dev, &lladdr, | |
b7b1bfce HFS |
3449 | &in6addr_linklocal_allrouters); |
3450 | else | |
caf92bc4 | 3451 | goto put; |
1da177e4 | 3452 | |
caf92bc4 | 3453 | write_lock(&idev->lock); |
b7b1bfce HFS |
3454 | /* The wait after the last probe can be shorter */ |
3455 | addrconf_mod_rs_timer(idev, (idev->rs_probes == | |
3456 | idev->cnf.rtr_solicits) ? | |
3457 | idev->cnf.rtr_solicit_delay : | |
3458 | idev->cnf.rtr_solicit_interval); | |
1da177e4 | 3459 | } else { |
1da177e4 LT |
3460 | /* |
3461 | * Note: we do not support deprecated "all on-link" | |
3462 | * assumption any longer. | |
3463 | */ | |
91df42be | 3464 | pr_debug("%s: no IPv6 routers present\n", idev->dev->name); |
1da177e4 LT |
3465 | } |
3466 | ||
3467 | out: | |
b7b1bfce | 3468 | write_unlock(&idev->lock); |
caf92bc4 | 3469 | put: |
b7b1bfce | 3470 | in6_dev_put(idev); |
1da177e4 LT |
3471 | } |
3472 | ||
3473 | /* | |
3474 | * Duplicate Address Detection | |
3475 | */ | |
3c21edbd YH |
3476 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
3477 | { | |
3478 | unsigned long rand_num; | |
3479 | struct inet6_dev *idev = ifp->idev; | |
3480 | ||
95c385b4 NH |
3481 | if (ifp->flags & IFA_F_OPTIMISTIC) |
3482 | rand_num = 0; | |
3483 | else | |
63862b5b | 3484 | rand_num = prandom_u32() % (idev->cnf.rtr_solicit_delay ? : 1); |
95c385b4 | 3485 | |
b7b1bfce | 3486 | ifp->dad_probes = idev->cnf.dad_transmits; |
c15b1cca | 3487 | addrconf_mod_dad_work(ifp, rand_num); |
3c21edbd YH |
3488 | } |
3489 | ||
c15b1cca | 3490 | static void addrconf_dad_begin(struct inet6_ifaddr *ifp) |
1da177e4 LT |
3491 | { |
3492 | struct inet6_dev *idev = ifp->idev; | |
3493 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
3494 | |
3495 | addrconf_join_solict(dev, &ifp->addr); | |
3496 | ||
63862b5b | 3497 | prandom_seed((__force u32) ifp->addr.s6_addr32[3]); |
1da177e4 LT |
3498 | |
3499 | read_lock_bh(&idev->lock); | |
622ccdf1 | 3500 | spin_lock(&ifp->lock); |
e9d3e084 | 3501 | if (ifp->state == INET6_IFADDR_STATE_DEAD) |
1da177e4 | 3502 | goto out; |
1da177e4 LT |
3503 | |
3504 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
1b34be74 | 3505 | idev->cnf.accept_dad < 1 || |
55ebaef1 NT |
3506 | !(ifp->flags&IFA_F_TENTATIVE) || |
3507 | ifp->flags & IFA_F_NODAD) { | |
cc411d0b | 3508 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 3509 | spin_unlock(&ifp->lock); |
1da177e4 LT |
3510 | read_unlock_bh(&idev->lock); |
3511 | ||
3512 | addrconf_dad_completed(ifp); | |
3513 | return; | |
3514 | } | |
3515 | ||
6732bade | 3516 | if (!(idev->if_flags & IF_READY)) { |
21809faf | 3517 | spin_unlock(&ifp->lock); |
6732bade | 3518 | read_unlock_bh(&idev->lock); |
3c21edbd | 3519 | /* |
590a9887 | 3520 | * If the device is not ready: |
3c21edbd YH |
3521 | * - keep it tentative if it is a permanent address. |
3522 | * - otherwise, kill it. | |
3523 | */ | |
3524 | in6_ifa_hold(ifp); | |
cc411d0b | 3525 | addrconf_dad_stop(ifp, 0); |
6732bade | 3526 | return; |
3c21edbd | 3527 | } |
95c385b4 NH |
3528 | |
3529 | /* | |
3530 | * Optimistic nodes can start receiving | |
3531 | * Frames right away | |
3532 | */ | |
7fd2561e | 3533 | if (ifp->flags & IFA_F_OPTIMISTIC) { |
95c385b4 | 3534 | ip6_ins_rt(ifp->rt); |
7fd2561e EK |
3535 | if (ipv6_use_optimistic_addr(idev)) { |
3536 | /* Because optimistic nodes can use this address, | |
3537 | * notify listeners. If DAD fails, RTM_DELADDR is sent. | |
3538 | */ | |
3539 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
3540 | } | |
3541 | } | |
95c385b4 | 3542 | |
6732bade | 3543 | addrconf_dad_kick(ifp); |
1da177e4 | 3544 | out: |
622ccdf1 | 3545 | spin_unlock(&ifp->lock); |
1da177e4 LT |
3546 | read_unlock_bh(&idev->lock); |
3547 | } | |
3548 | ||
c15b1cca | 3549 | static void addrconf_dad_start(struct inet6_ifaddr *ifp) |
1da177e4 | 3550 | { |
c15b1cca HFS |
3551 | bool begin_dad = false; |
3552 | ||
8e8e676d | 3553 | spin_lock_bh(&ifp->lock); |
c15b1cca HFS |
3554 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
3555 | ifp->state = INET6_IFADDR_STATE_PREDAD; | |
3556 | begin_dad = true; | |
3557 | } | |
8e8e676d | 3558 | spin_unlock_bh(&ifp->lock); |
c15b1cca HFS |
3559 | |
3560 | if (begin_dad) | |
3561 | addrconf_mod_dad_work(ifp, 0); | |
3562 | } | |
3563 | ||
3564 | static void addrconf_dad_work(struct work_struct *w) | |
3565 | { | |
3566 | struct inet6_ifaddr *ifp = container_of(to_delayed_work(w), | |
3567 | struct inet6_ifaddr, | |
3568 | dad_work); | |
1da177e4 | 3569 | struct inet6_dev *idev = ifp->idev; |
1da177e4 LT |
3570 | struct in6_addr mcaddr; |
3571 | ||
c15b1cca HFS |
3572 | enum { |
3573 | DAD_PROCESS, | |
3574 | DAD_BEGIN, | |
3575 | DAD_ABORT, | |
3576 | } action = DAD_PROCESS; | |
3577 | ||
3578 | rtnl_lock(); | |
3579 | ||
8e8e676d | 3580 | spin_lock_bh(&ifp->lock); |
c15b1cca HFS |
3581 | if (ifp->state == INET6_IFADDR_STATE_PREDAD) { |
3582 | action = DAD_BEGIN; | |
3583 | ifp->state = INET6_IFADDR_STATE_DAD; | |
3584 | } else if (ifp->state == INET6_IFADDR_STATE_ERRDAD) { | |
3585 | action = DAD_ABORT; | |
3586 | ifp->state = INET6_IFADDR_STATE_POSTDAD; | |
3587 | } | |
8e8e676d | 3588 | spin_unlock_bh(&ifp->lock); |
c15b1cca HFS |
3589 | |
3590 | if (action == DAD_BEGIN) { | |
3591 | addrconf_dad_begin(ifp); | |
3592 | goto out; | |
3593 | } else if (action == DAD_ABORT) { | |
3594 | addrconf_dad_stop(ifp, 1); | |
3595 | goto out; | |
3596 | } | |
3597 | ||
b7b1bfce | 3598 | if (!ifp->dad_probes && addrconf_dad_end(ifp)) |
f2344a13 HX |
3599 | goto out; |
3600 | ||
c15b1cca | 3601 | write_lock_bh(&idev->lock); |
122e4519 | 3602 | if (idev->dead || !(idev->if_flags & IF_READY)) { |
c15b1cca | 3603 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
3604 | goto out; |
3605 | } | |
21809faf | 3606 | |
3607 | spin_lock(&ifp->lock); | |
622ccdf1 HX |
3608 | if (ifp->state == INET6_IFADDR_STATE_DEAD) { |
3609 | spin_unlock(&ifp->lock); | |
c15b1cca | 3610 | write_unlock_bh(&idev->lock); |
622ccdf1 HX |
3611 | goto out; |
3612 | } | |
3613 | ||
b7b1bfce | 3614 | if (ifp->dad_probes == 0) { |
1da177e4 LT |
3615 | /* |
3616 | * DAD was successful | |
3617 | */ | |
3618 | ||
cc411d0b | 3619 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 3620 | spin_unlock(&ifp->lock); |
c15b1cca | 3621 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
3622 | |
3623 | addrconf_dad_completed(ifp); | |
3624 | ||
3625 | goto out; | |
3626 | } | |
3627 | ||
b7b1bfce | 3628 | ifp->dad_probes--; |
c15b1cca HFS |
3629 | addrconf_mod_dad_work(ifp, |
3630 | NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME)); | |
21809faf | 3631 | spin_unlock(&ifp->lock); |
c15b1cca | 3632 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
3633 | |
3634 | /* send a neighbour solicitation for our addr */ | |
1da177e4 | 3635 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
38cf595b | 3636 | ndisc_send_ns(ifp->idev->dev, &ifp->addr, &mcaddr, &in6addr_any, NULL); |
1da177e4 LT |
3637 | out: |
3638 | in6_ifa_put(ifp); | |
c15b1cca | 3639 | rtnl_unlock(); |
1da177e4 LT |
3640 | } |
3641 | ||
11ffff75 HFS |
3642 | /* ifp->idev must be at least read locked */ |
3643 | static bool ipv6_lonely_lladdr(struct inet6_ifaddr *ifp) | |
3644 | { | |
3645 | struct inet6_ifaddr *ifpiter; | |
3646 | struct inet6_dev *idev = ifp->idev; | |
3647 | ||
602582ca HFS |
3648 | list_for_each_entry_reverse(ifpiter, &idev->addr_list, if_list) { |
3649 | if (ifpiter->scope > IFA_LINK) | |
3650 | break; | |
11ffff75 HFS |
3651 | if (ifp != ifpiter && ifpiter->scope == IFA_LINK && |
3652 | (ifpiter->flags & (IFA_F_PERMANENT|IFA_F_TENTATIVE| | |
3653 | IFA_F_OPTIMISTIC|IFA_F_DADFAILED)) == | |
3654 | IFA_F_PERMANENT) | |
3655 | return false; | |
3656 | } | |
3657 | return true; | |
3658 | } | |
3659 | ||
1da177e4 LT |
3660 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) |
3661 | { | |
e21e8467 | 3662 | struct net_device *dev = ifp->idev->dev; |
b7b1bfce | 3663 | struct in6_addr lladdr; |
b173ee48 | 3664 | bool send_rs, send_mld; |
b7b1bfce | 3665 | |
c15b1cca | 3666 | addrconf_del_dad_work(ifp); |
1da177e4 LT |
3667 | |
3668 | /* | |
3669 | * Configure the address for reception. Now it is valid. | |
3670 | */ | |
3671 | ||
3672 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
3673 | ||
026359bc TA |
3674 | /* If added prefix is link local and we are prepared to process |
3675 | router advertisements, start sending router solicitations. | |
1da177e4 LT |
3676 | */ |
3677 | ||
1ec047eb | 3678 | read_lock_bh(&ifp->idev->lock); |
11ffff75 | 3679 | send_mld = ifp->scope == IFA_LINK && ipv6_lonely_lladdr(ifp); |
b173ee48 HFS |
3680 | send_rs = send_mld && |
3681 | ipv6_accept_ra(ifp->idev) && | |
1ec047eb | 3682 | ifp->idev->cnf.rtr_solicits > 0 && |
b173ee48 | 3683 | (dev->flags&IFF_LOOPBACK) == 0; |
1ec047eb HFS |
3684 | read_unlock_bh(&ifp->idev->lock); |
3685 | ||
b173ee48 HFS |
3686 | /* While dad is in progress mld report's source address is in6_addrany. |
3687 | * Resend with proper ll now. | |
3688 | */ | |
3689 | if (send_mld) | |
3690 | ipv6_mc_dad_complete(ifp->idev); | |
3691 | ||
1ec047eb | 3692 | if (send_rs) { |
1da177e4 LT |
3693 | /* |
3694 | * If a host as already performed a random delay | |
3695 | * [...] as part of DAD [...] there is no need | |
3696 | * to delay again before sending the first RS | |
3697 | */ | |
1ec047eb | 3698 | if (ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) |
b7b1bfce | 3699 | return; |
1ec047eb | 3700 | ndisc_send_rs(dev, &lladdr, &in6addr_linklocal_allrouters); |
1da177e4 | 3701 | |
b7b1bfce HFS |
3702 | write_lock_bh(&ifp->idev->lock); |
3703 | spin_lock(&ifp->lock); | |
3704 | ifp->idev->rs_probes = 1; | |
1da177e4 | 3705 | ifp->idev->if_flags |= IF_RS_SENT; |
b7b1bfce HFS |
3706 | addrconf_mod_rs_timer(ifp->idev, |
3707 | ifp->idev->cnf.rtr_solicit_interval); | |
3708 | spin_unlock(&ifp->lock); | |
3709 | write_unlock_bh(&ifp->idev->lock); | |
1da177e4 LT |
3710 | } |
3711 | } | |
3712 | ||
e21e8467 SH |
3713 | static void addrconf_dad_run(struct inet6_dev *idev) |
3714 | { | |
c5e33bdd YH |
3715 | struct inet6_ifaddr *ifp; |
3716 | ||
3717 | read_lock_bh(&idev->lock); | |
502a2ffd | 3718 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
21809faf | 3719 | spin_lock(&ifp->lock); |
f2344a13 HX |
3720 | if (ifp->flags & IFA_F_TENTATIVE && |
3721 | ifp->state == INET6_IFADDR_STATE_DAD) | |
3722 | addrconf_dad_kick(ifp); | |
21809faf | 3723 | spin_unlock(&ifp->lock); |
c5e33bdd YH |
3724 | } |
3725 | read_unlock_bh(&idev->lock); | |
3726 | } | |
3727 | ||
1da177e4 LT |
3728 | #ifdef CONFIG_PROC_FS |
3729 | struct if6_iter_state { | |
3c40090a | 3730 | struct seq_net_private p; |
1da177e4 | 3731 | int bucket; |
1d578303 | 3732 | int offset; |
1da177e4 LT |
3733 | }; |
3734 | ||
1d578303 | 3735 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos) |
1da177e4 LT |
3736 | { |
3737 | struct inet6_ifaddr *ifa = NULL; | |
3738 | struct if6_iter_state *state = seq->private; | |
1218854a | 3739 | struct net *net = seq_file_net(seq); |
1d578303 | 3740 | int p = 0; |
1da177e4 | 3741 | |
1d578303 MM |
3742 | /* initial bucket if pos is 0 */ |
3743 | if (pos == 0) { | |
3744 | state->bucket = 0; | |
3745 | state->offset = 0; | |
3746 | } | |
3747 | ||
3748 | for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
b67bfe0d | 3749 | hlist_for_each_entry_rcu_bh(ifa, &inet6_addr_lst[state->bucket], |
1d578303 | 3750 | addr_lst) { |
9f0d3c27 ED |
3751 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3752 | continue; | |
1d578303 MM |
3753 | /* sync with offset */ |
3754 | if (p < state->offset) { | |
3755 | p++; | |
3756 | continue; | |
3757 | } | |
3758 | state->offset++; | |
9f0d3c27 | 3759 | return ifa; |
1d578303 MM |
3760 | } |
3761 | ||
3762 | /* prepare for next bucket */ | |
3763 | state->offset = 0; | |
3764 | p = 0; | |
1da177e4 | 3765 | } |
c2e21293 | 3766 | return NULL; |
1da177e4 LT |
3767 | } |
3768 | ||
c2e21293 | 3769 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, |
3770 | struct inet6_ifaddr *ifa) | |
1da177e4 LT |
3771 | { |
3772 | struct if6_iter_state *state = seq->private; | |
1218854a | 3773 | struct net *net = seq_file_net(seq); |
1da177e4 | 3774 | |
b67bfe0d | 3775 | hlist_for_each_entry_continue_rcu_bh(ifa, addr_lst) { |
9f0d3c27 ED |
3776 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3777 | continue; | |
1d578303 | 3778 | state->offset++; |
9f0d3c27 | 3779 | return ifa; |
1d578303 | 3780 | } |
3c40090a | 3781 | |
c2e21293 | 3782 | while (++state->bucket < IN6_ADDR_HSIZE) { |
1d578303 | 3783 | state->offset = 0; |
b67bfe0d | 3784 | hlist_for_each_entry_rcu_bh(ifa, |
c2e21293 | 3785 | &inet6_addr_lst[state->bucket], addr_lst) { |
9f0d3c27 ED |
3786 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3787 | continue; | |
1d578303 | 3788 | state->offset++; |
9f0d3c27 | 3789 | return ifa; |
c2e21293 | 3790 | } |
1da177e4 | 3791 | } |
3c40090a | 3792 | |
c2e21293 | 3793 | return NULL; |
1da177e4 LT |
3794 | } |
3795 | ||
1da177e4 | 3796 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) |
4f70ecca | 3797 | __acquires(rcu_bh) |
1da177e4 | 3798 | { |
5c578aed | 3799 | rcu_read_lock_bh(); |
1d578303 | 3800 | return if6_get_first(seq, *pos); |
1da177e4 LT |
3801 | } |
3802 | ||
3803 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3804 | { | |
3805 | struct inet6_ifaddr *ifa; | |
3806 | ||
3807 | ifa = if6_get_next(seq, v); | |
3808 | ++*pos; | |
3809 | return ifa; | |
3810 | } | |
3811 | ||
3812 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
4f70ecca | 3813 | __releases(rcu_bh) |
1da177e4 | 3814 | { |
5c578aed | 3815 | rcu_read_unlock_bh(); |
1da177e4 LT |
3816 | } |
3817 | ||
3818 | static int if6_seq_show(struct seq_file *seq, void *v) | |
3819 | { | |
3820 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
971a351c | 3821 | seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", |
b071195d | 3822 | &ifp->addr, |
1da177e4 LT |
3823 | ifp->idev->dev->ifindex, |
3824 | ifp->prefix_len, | |
3825 | ifp->scope, | |
971a351c | 3826 | (u8) ifp->flags, |
1da177e4 LT |
3827 | ifp->idev->dev->name); |
3828 | return 0; | |
3829 | } | |
3830 | ||
56b3d975 | 3831 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
3832 | .start = if6_seq_start, |
3833 | .next = if6_seq_next, | |
3834 | .show = if6_seq_show, | |
3835 | .stop = if6_seq_stop, | |
3836 | }; | |
3837 | ||
3838 | static int if6_seq_open(struct inode *inode, struct file *file) | |
3839 | { | |
3c40090a DL |
3840 | return seq_open_net(inode, file, &if6_seq_ops, |
3841 | sizeof(struct if6_iter_state)); | |
1da177e4 LT |
3842 | } |
3843 | ||
9a32144e | 3844 | static const struct file_operations if6_fops = { |
1da177e4 LT |
3845 | .owner = THIS_MODULE, |
3846 | .open = if6_seq_open, | |
3847 | .read = seq_read, | |
3848 | .llseek = seq_lseek, | |
3c40090a | 3849 | .release = seq_release_net, |
1da177e4 LT |
3850 | }; |
3851 | ||
2c8c1e72 | 3852 | static int __net_init if6_proc_net_init(struct net *net) |
1da177e4 | 3853 | { |
d4beaa66 | 3854 | if (!proc_create("if_inet6", S_IRUGO, net->proc_net, &if6_fops)) |
1da177e4 LT |
3855 | return -ENOMEM; |
3856 | return 0; | |
3857 | } | |
3858 | ||
2c8c1e72 | 3859 | static void __net_exit if6_proc_net_exit(struct net *net) |
3c40090a | 3860 | { |
ece31ffd | 3861 | remove_proc_entry("if_inet6", net->proc_net); |
3c40090a DL |
3862 | } |
3863 | ||
3864 | static struct pernet_operations if6_proc_net_ops = { | |
67ba4152 IM |
3865 | .init = if6_proc_net_init, |
3866 | .exit = if6_proc_net_exit, | |
3c40090a DL |
3867 | }; |
3868 | ||
3869 | int __init if6_proc_init(void) | |
3870 | { | |
3871 | return register_pernet_subsys(&if6_proc_net_ops); | |
3872 | } | |
3873 | ||
1da177e4 LT |
3874 | void if6_proc_exit(void) |
3875 | { | |
3c40090a | 3876 | unregister_pernet_subsys(&if6_proc_net_ops); |
1da177e4 LT |
3877 | } |
3878 | #endif /* CONFIG_PROC_FS */ | |
3879 | ||
07a93626 | 3880 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
3b9f9a1c | 3881 | /* Check if address is a home address configured on any interface. */ |
b71d1d42 | 3882 | int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr) |
3b9f9a1c NT |
3883 | { |
3884 | int ret = 0; | |
c2e21293 | 3885 | struct inet6_ifaddr *ifp = NULL; |
ddbe5032 | 3886 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 3887 | |
5c578aed | 3888 | rcu_read_lock_bh(); |
b67bfe0d | 3889 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 3890 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
389f6612 | 3891 | continue; |
caad295f | 3892 | if (ipv6_addr_equal(&ifp->addr, addr) && |
3b9f9a1c NT |
3893 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
3894 | ret = 1; | |
3895 | break; | |
3896 | } | |
3897 | } | |
5c578aed | 3898 | rcu_read_unlock_bh(); |
3b9f9a1c NT |
3899 | return ret; |
3900 | } | |
3901 | #endif | |
3902 | ||
1da177e4 LT |
3903 | /* |
3904 | * Periodic address status verification | |
3905 | */ | |
3906 | ||
c15b1cca | 3907 | static void addrconf_verify_rtnl(void) |
1da177e4 | 3908 | { |
b2db7564 | 3909 | unsigned long now, next, next_sec, next_sched; |
1da177e4 | 3910 | struct inet6_ifaddr *ifp; |
1da177e4 LT |
3911 | int i; |
3912 | ||
c15b1cca HFS |
3913 | ASSERT_RTNL(); |
3914 | ||
5c578aed | 3915 | rcu_read_lock_bh(); |
1da177e4 | 3916 | now = jiffies; |
b2db7564 | 3917 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); |
1da177e4 | 3918 | |
c15b1cca | 3919 | cancel_delayed_work(&addr_chk_work); |
1da177e4 | 3920 | |
bcdd553f | 3921 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
1da177e4 | 3922 | restart: |
c15b1cca | 3923 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[i], addr_lst) { |
1da177e4 | 3924 | unsigned long age; |
1da177e4 | 3925 | |
fad8da3e YA |
3926 | /* When setting preferred_lft to a value not zero or |
3927 | * infinity, while valid_lft is infinity | |
3928 | * IFA_F_PERMANENT has a non-infinity life time. | |
3929 | */ | |
3930 | if ((ifp->flags & IFA_F_PERMANENT) && | |
3931 | (ifp->prefered_lft == INFINITY_LIFE_TIME)) | |
1da177e4 LT |
3932 | continue; |
3933 | ||
3934 | spin_lock(&ifp->lock); | |
b2db7564 YH |
3935 | /* We try to batch several events at once. */ |
3936 | age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; | |
1da177e4 | 3937 | |
8f27ebb9 YH |
3938 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
3939 | age >= ifp->valid_lft) { | |
1da177e4 LT |
3940 | spin_unlock(&ifp->lock); |
3941 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3942 | ipv6_del_addr(ifp); |
3943 | goto restart; | |
8f27ebb9 YH |
3944 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
3945 | spin_unlock(&ifp->lock); | |
3946 | continue; | |
1da177e4 | 3947 | } else if (age >= ifp->prefered_lft) { |
a1ed0526 | 3948 | /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ |
1da177e4 LT |
3949 | int deprecate = 0; |
3950 | ||
3951 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
3952 | deprecate = 1; | |
3953 | ifp->flags |= IFA_F_DEPRECATED; | |
3954 | } | |
3955 | ||
fad8da3e YA |
3956 | if ((ifp->valid_lft != INFINITY_LIFE_TIME) && |
3957 | (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))) | |
1da177e4 LT |
3958 | next = ifp->tstamp + ifp->valid_lft * HZ; |
3959 | ||
3960 | spin_unlock(&ifp->lock); | |
3961 | ||
3962 | if (deprecate) { | |
3963 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3964 | |
3965 | ipv6_ifa_notify(0, ifp); | |
3966 | in6_ifa_put(ifp); | |
3967 | goto restart; | |
3968 | } | |
1da177e4 LT |
3969 | } else if ((ifp->flags&IFA_F_TEMPORARY) && |
3970 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
88949cf4 | 3971 | unsigned long regen_advance = ifp->idev->cnf.regen_max_retry * |
3972 | ifp->idev->cnf.dad_transmits * | |
1f9248e5 | 3973 | NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME) / HZ; |
88949cf4 | 3974 | |
1da177e4 LT |
3975 | if (age >= ifp->prefered_lft - regen_advance) { |
3976 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
3977 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3978 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3979 | if (!ifp->regen_count && ifpub) { | |
3980 | ifp->regen_count++; | |
3981 | in6_ifa_hold(ifp); | |
3982 | in6_ifa_hold(ifpub); | |
3983 | spin_unlock(&ifp->lock); | |
5c578aed | 3984 | |
291d809b HY |
3985 | spin_lock(&ifpub->lock); |
3986 | ifpub->regen_count = 0; | |
3987 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
3988 | ipv6_create_tempaddr(ifpub, ifp); |
3989 | in6_ifa_put(ifpub); | |
3990 | in6_ifa_put(ifp); | |
3991 | goto restart; | |
3992 | } | |
3993 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
3994 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
3995 | spin_unlock(&ifp->lock); | |
1da177e4 LT |
3996 | } else { |
3997 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
3998 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3999 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
4000 | spin_unlock(&ifp->lock); | |
4001 | } | |
4002 | } | |
1da177e4 LT |
4003 | } |
4004 | ||
b2db7564 YH |
4005 | next_sec = round_jiffies_up(next); |
4006 | next_sched = next; | |
4007 | ||
4008 | /* If rounded timeout is accurate enough, accept it. */ | |
4009 | if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) | |
4010 | next_sched = next_sec; | |
4011 | ||
4012 | /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ | |
4013 | if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX)) | |
4014 | next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX; | |
4015 | ||
ba3542e1 | 4016 | ADBG(KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n", |
4017 | now, next, next_sec, next_sched); | |
c15b1cca | 4018 | mod_delayed_work(addrconf_wq, &addr_chk_work, next_sched - now); |
5c578aed | 4019 | rcu_read_unlock_bh(); |
1da177e4 LT |
4020 | } |
4021 | ||
c15b1cca HFS |
4022 | static void addrconf_verify_work(struct work_struct *w) |
4023 | { | |
4024 | rtnl_lock(); | |
4025 | addrconf_verify_rtnl(); | |
4026 | rtnl_unlock(); | |
4027 | } | |
4028 | ||
4029 | static void addrconf_verify(void) | |
4030 | { | |
4031 | mod_delayed_work(addrconf_wq, &addr_chk_work, 0); | |
4032 | } | |
4033 | ||
caeaba79 ND |
4034 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local, |
4035 | struct in6_addr **peer_pfx) | |
461d8837 TG |
4036 | { |
4037 | struct in6_addr *pfx = NULL; | |
4038 | ||
caeaba79 ND |
4039 | *peer_pfx = NULL; |
4040 | ||
461d8837 TG |
4041 | if (addr) |
4042 | pfx = nla_data(addr); | |
4043 | ||
4044 | if (local) { | |
4045 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
caeaba79 ND |
4046 | *peer_pfx = pfx; |
4047 | pfx = nla_data(local); | |
461d8837 TG |
4048 | } |
4049 | ||
4050 | return pfx; | |
4051 | } | |
4052 | ||
ef7c79ed | 4053 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
4054 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
4055 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
4056 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
479840ff | 4057 | [IFA_FLAGS] = { .len = sizeof(u32) }, |
461d8837 TG |
4058 | }; |
4059 | ||
1da177e4 | 4060 | static int |
661d2967 | 4061 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 4062 | { |
3b1e0a65 | 4063 | struct net *net = sock_net(skb->sk); |
b933f716 TG |
4064 | struct ifaddrmsg *ifm; |
4065 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 4066 | struct in6_addr *pfx, *peer_pfx; |
6046d5b4 | 4067 | u32 ifa_flags; |
b933f716 | 4068 | int err; |
1da177e4 | 4069 | |
b933f716 TG |
4070 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
4071 | if (err < 0) | |
4072 | return err; | |
4073 | ||
4074 | ifm = nlmsg_data(nlh); | |
caeaba79 | 4075 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
63159f29 | 4076 | if (!pfx) |
1da177e4 LT |
4077 | return -EINVAL; |
4078 | ||
6046d5b4 HK |
4079 | ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags; |
4080 | ||
4081 | /* We ignore other flags so far. */ | |
4082 | ifa_flags &= IFA_F_MANAGETEMPADDR; | |
4083 | ||
4084 | return inet6_addr_del(net, ifm->ifa_index, ifa_flags, pfx, | |
4085 | ifm->ifa_prefixlen); | |
1da177e4 LT |
4086 | } |
4087 | ||
479840ff | 4088 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u32 ifa_flags, |
55ebaef1 | 4089 | u32 prefered_lft, u32 valid_lft) |
081bba5b | 4090 | { |
6f704992 YH |
4091 | u32 flags; |
4092 | clock_t expires; | |
4bed72e4 | 4093 | unsigned long timeout; |
53bd6749 | 4094 | bool was_managetempaddr; |
5b84efec | 4095 | bool had_prefixroute; |
46d48046 | 4096 | |
c15b1cca HFS |
4097 | ASSERT_RTNL(); |
4098 | ||
081bba5b NT |
4099 | if (!valid_lft || (prefered_lft > valid_lft)) |
4100 | return -EINVAL; | |
4101 | ||
53bd6749 JP |
4102 | if (ifa_flags & IFA_F_MANAGETEMPADDR && |
4103 | (ifp->flags & IFA_F_TEMPORARY || ifp->prefix_len != 64)) | |
4104 | return -EINVAL; | |
4105 | ||
4bed72e4 YH |
4106 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
4107 | if (addrconf_finite_timeout(timeout)) { | |
4108 | expires = jiffies_to_clock_t(timeout * HZ); | |
4109 | valid_lft = timeout; | |
6f704992 | 4110 | flags = RTF_EXPIRES; |
4bed72e4 YH |
4111 | } else { |
4112 | expires = 0; | |
4113 | flags = 0; | |
4114 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 4115 | } |
081bba5b | 4116 | |
4bed72e4 YH |
4117 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
4118 | if (addrconf_finite_timeout(timeout)) { | |
4119 | if (timeout == 0) | |
4120 | ifa_flags |= IFA_F_DEPRECATED; | |
4121 | prefered_lft = timeout; | |
4122 | } | |
081bba5b NT |
4123 | |
4124 | spin_lock_bh(&ifp->lock); | |
53bd6749 | 4125 | was_managetempaddr = ifp->flags & IFA_F_MANAGETEMPADDR; |
5b84efec TH |
4126 | had_prefixroute = ifp->flags & IFA_F_PERMANENT && |
4127 | !(ifp->flags & IFA_F_NOPREFIXROUTE); | |
53bd6749 | 4128 | ifp->flags &= ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | |
761aac73 TH |
4129 | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR | |
4130 | IFA_F_NOPREFIXROUTE); | |
53bd6749 | 4131 | ifp->flags |= ifa_flags; |
081bba5b NT |
4132 | ifp->tstamp = jiffies; |
4133 | ifp->valid_lft = valid_lft; | |
4134 | ifp->prefered_lft = prefered_lft; | |
4135 | ||
4136 | spin_unlock_bh(&ifp->lock); | |
4137 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
4138 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 4139 | |
761aac73 TH |
4140 | if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) { |
4141 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, | |
4142 | expires, flags); | |
5b84efec TH |
4143 | } else if (had_prefixroute) { |
4144 | enum cleanup_prefix_rt_t action; | |
4145 | unsigned long rt_expires; | |
4146 | ||
4147 | write_lock_bh(&ifp->idev->lock); | |
4148 | action = check_cleanup_prefix_route(ifp, &rt_expires); | |
4149 | write_unlock_bh(&ifp->idev->lock); | |
4150 | ||
4151 | if (action != CLEANUP_PREFIX_RT_NOP) { | |
4152 | cleanup_prefix_route(ifp, rt_expires, | |
4153 | action == CLEANUP_PREFIX_RT_DEL); | |
4154 | } | |
761aac73 | 4155 | } |
53bd6749 JP |
4156 | |
4157 | if (was_managetempaddr || ifp->flags & IFA_F_MANAGETEMPADDR) { | |
4158 | if (was_managetempaddr && !(ifp->flags & IFA_F_MANAGETEMPADDR)) | |
4159 | valid_lft = prefered_lft = 0; | |
4160 | manage_tempaddrs(ifp->idev, ifp, valid_lft, prefered_lft, | |
4161 | !was_managetempaddr, jiffies); | |
4162 | } | |
4163 | ||
c15b1cca | 4164 | addrconf_verify_rtnl(); |
081bba5b NT |
4165 | |
4166 | return 0; | |
4167 | } | |
4168 | ||
1da177e4 | 4169 | static int |
661d2967 | 4170 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 4171 | { |
3b1e0a65 | 4172 | struct net *net = sock_net(skb->sk); |
461d8837 TG |
4173 | struct ifaddrmsg *ifm; |
4174 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 4175 | struct in6_addr *pfx, *peer_pfx; |
7198f8ce TG |
4176 | struct inet6_ifaddr *ifa; |
4177 | struct net_device *dev; | |
55ebaef1 | 4178 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
479840ff | 4179 | u32 ifa_flags; |
461d8837 | 4180 | int err; |
1da177e4 | 4181 | |
461d8837 TG |
4182 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
4183 | if (err < 0) | |
4184 | return err; | |
4185 | ||
4186 | ifm = nlmsg_data(nlh); | |
caeaba79 | 4187 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
63159f29 | 4188 | if (!pfx) |
1da177e4 LT |
4189 | return -EINVAL; |
4190 | ||
461d8837 | 4191 | if (tb[IFA_CACHEINFO]) { |
0778769d | 4192 | struct ifa_cacheinfo *ci; |
461d8837 TG |
4193 | |
4194 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 4195 | valid_lft = ci->ifa_valid; |
461d8837 TG |
4196 | preferred_lft = ci->ifa_prefered; |
4197 | } else { | |
4198 | preferred_lft = INFINITY_LIFE_TIME; | |
4199 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
4200 | } |
4201 | ||
af284937 | 4202 | dev = __dev_get_by_index(net, ifm->ifa_index); |
63159f29 | 4203 | if (!dev) |
7198f8ce TG |
4204 | return -ENODEV; |
4205 | ||
479840ff JP |
4206 | ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags; |
4207 | ||
55ebaef1 | 4208 | /* We ignore other flags so far. */ |
761aac73 | 4209 | ifa_flags &= IFA_F_NODAD | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR | |
93a714d6 | 4210 | IFA_F_NOPREFIXROUTE | IFA_F_MCAUTOJOIN; |
55ebaef1 | 4211 | |
1cab3da6 | 4212 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
63159f29 | 4213 | if (!ifa) { |
7198f8ce TG |
4214 | /* |
4215 | * It would be best to check for !NLM_F_CREATE here but | |
db9c7c39 | 4216 | * userspace already relies on not having to provide this. |
7198f8ce | 4217 | */ |
caeaba79 | 4218 | return inet6_addr_add(net, ifm->ifa_index, pfx, peer_pfx, |
af284937 DL |
4219 | ifm->ifa_prefixlen, ifa_flags, |
4220 | preferred_lft, valid_lft); | |
081bba5b NT |
4221 | } |
4222 | ||
7198f8ce TG |
4223 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
4224 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
4225 | err = -EEXIST; | |
4226 | else | |
55ebaef1 | 4227 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
4228 | |
4229 | in6_ifa_put(ifa); | |
4230 | ||
4231 | return err; | |
1da177e4 LT |
4232 | } |
4233 | ||
479840ff | 4234 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u32 flags, |
101bb229 TG |
4235 | u8 scope, int ifindex) |
4236 | { | |
4237 | struct ifaddrmsg *ifm; | |
4238 | ||
4239 | ifm = nlmsg_data(nlh); | |
4240 | ifm->ifa_family = AF_INET6; | |
4241 | ifm->ifa_prefixlen = prefixlen; | |
4242 | ifm->ifa_flags = flags; | |
4243 | ifm->ifa_scope = scope; | |
4244 | ifm->ifa_index = ifindex; | |
4245 | } | |
4246 | ||
85486af0 TG |
4247 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
4248 | unsigned long tstamp, u32 preferred, u32 valid) | |
4249 | { | |
4250 | struct ifa_cacheinfo ci; | |
4251 | ||
18a31e1e TG |
4252 | ci.cstamp = cstamp_delta(cstamp); |
4253 | ci.tstamp = cstamp_delta(tstamp); | |
85486af0 TG |
4254 | ci.ifa_prefered = preferred; |
4255 | ci.ifa_valid = valid; | |
4256 | ||
4257 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
4258 | } | |
4259 | ||
101bb229 TG |
4260 | static inline int rt_scope(int ifa_scope) |
4261 | { | |
4262 | if (ifa_scope & IFA_HOST) | |
4263 | return RT_SCOPE_HOST; | |
4264 | else if (ifa_scope & IFA_LINK) | |
4265 | return RT_SCOPE_LINK; | |
4266 | else if (ifa_scope & IFA_SITE) | |
4267 | return RT_SCOPE_SITE; | |
4268 | else | |
4269 | return RT_SCOPE_UNIVERSE; | |
4270 | } | |
4271 | ||
0ab6803b TG |
4272 | static inline int inet6_ifaddr_msgsize(void) |
4273 | { | |
339bf98f | 4274 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
caeaba79 | 4275 | + nla_total_size(16) /* IFA_LOCAL */ |
339bf98f | 4276 | + nla_total_size(16) /* IFA_ADDRESS */ |
479840ff JP |
4277 | + nla_total_size(sizeof(struct ifa_cacheinfo)) |
4278 | + nla_total_size(4) /* IFA_FLAGS */; | |
0ab6803b | 4279 | } |
c5396a31 | 4280 | |
1da177e4 | 4281 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
15e47304 | 4282 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4283 | { |
1da177e4 | 4284 | struct nlmsghdr *nlh; |
85486af0 | 4285 | u32 preferred, valid; |
1da177e4 | 4286 | |
15e47304 | 4287 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
63159f29 | 4288 | if (!nlh) |
26932566 | 4289 | return -EMSGSIZE; |
0ab6803b | 4290 | |
101bb229 TG |
4291 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
4292 | ifa->idev->dev->ifindex); | |
4293 | ||
fad8da3e YA |
4294 | if (!((ifa->flags&IFA_F_PERMANENT) && |
4295 | (ifa->prefered_lft == INFINITY_LIFE_TIME))) { | |
85486af0 TG |
4296 | preferred = ifa->prefered_lft; |
4297 | valid = ifa->valid_lft; | |
4298 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 4299 | long tval = (jiffies - ifa->tstamp)/HZ; |
a1faa698 JR |
4300 | if (preferred > tval) |
4301 | preferred -= tval; | |
4302 | else | |
4303 | preferred = 0; | |
f56619fc BH |
4304 | if (valid != INFINITY_LIFE_TIME) { |
4305 | if (valid > tval) | |
4306 | valid -= tval; | |
4307 | else | |
4308 | valid = 0; | |
4309 | } | |
1da177e4 LT |
4310 | } |
4311 | } else { | |
85486af0 TG |
4312 | preferred = INFINITY_LIFE_TIME; |
4313 | valid = INFINITY_LIFE_TIME; | |
4314 | } | |
4315 | ||
7996c799 | 4316 | if (!ipv6_addr_any(&ifa->peer_addr)) { |
930345ea JB |
4317 | if (nla_put_in6_addr(skb, IFA_LOCAL, &ifa->addr) < 0 || |
4318 | nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->peer_addr) < 0) | |
caeaba79 ND |
4319 | goto error; |
4320 | } else | |
930345ea | 4321 | if (nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->addr) < 0) |
caeaba79 ND |
4322 | goto error; |
4323 | ||
4324 | if (put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) | |
4325 | goto error; | |
1da177e4 | 4326 | |
479840ff JP |
4327 | if (nla_put_u32(skb, IFA_FLAGS, ifa->flags) < 0) |
4328 | goto error; | |
4329 | ||
053c095a JB |
4330 | nlmsg_end(skb, nlh); |
4331 | return 0; | |
caeaba79 ND |
4332 | |
4333 | error: | |
4334 | nlmsg_cancel(skb, nlh); | |
4335 | return -EMSGSIZE; | |
1da177e4 LT |
4336 | } |
4337 | ||
4338 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
15e47304 | 4339 | u32 portid, u32 seq, int event, u16 flags) |
1da177e4 | 4340 | { |
1da177e4 | 4341 | struct nlmsghdr *nlh; |
101bb229 TG |
4342 | u8 scope = RT_SCOPE_UNIVERSE; |
4343 | int ifindex = ifmca->idev->dev->ifindex; | |
4344 | ||
4345 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
4346 | scope = RT_SCOPE_SITE; | |
1da177e4 | 4347 | |
15e47304 | 4348 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
63159f29 | 4349 | if (!nlh) |
26932566 | 4350 | return -EMSGSIZE; |
85486af0 | 4351 | |
0ab6803b | 4352 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
930345ea | 4353 | if (nla_put_in6_addr(skb, IFA_MULTICAST, &ifmca->mca_addr) < 0 || |
0ab6803b | 4354 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, |
26932566 PM |
4355 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
4356 | nlmsg_cancel(skb, nlh); | |
4357 | return -EMSGSIZE; | |
4358 | } | |
85486af0 | 4359 | |
053c095a JB |
4360 | nlmsg_end(skb, nlh); |
4361 | return 0; | |
1da177e4 LT |
4362 | } |
4363 | ||
4364 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
15e47304 | 4365 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4366 | { |
1da177e4 | 4367 | struct nlmsghdr *nlh; |
101bb229 TG |
4368 | u8 scope = RT_SCOPE_UNIVERSE; |
4369 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
4370 | ||
4371 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
4372 | scope = RT_SCOPE_SITE; | |
1da177e4 | 4373 | |
15e47304 | 4374 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
63159f29 | 4375 | if (!nlh) |
26932566 | 4376 | return -EMSGSIZE; |
85486af0 | 4377 | |
0ab6803b | 4378 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
930345ea | 4379 | if (nla_put_in6_addr(skb, IFA_ANYCAST, &ifaca->aca_addr) < 0 || |
0ab6803b | 4380 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, |
26932566 PM |
4381 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
4382 | nlmsg_cancel(skb, nlh); | |
4383 | return -EMSGSIZE; | |
4384 | } | |
1da177e4 | 4385 | |
053c095a JB |
4386 | nlmsg_end(skb, nlh); |
4387 | return 0; | |
1da177e4 LT |
4388 | } |
4389 | ||
e21e8467 | 4390 | enum addr_type_t { |
1da177e4 LT |
4391 | UNICAST_ADDR, |
4392 | MULTICAST_ADDR, | |
4393 | ANYCAST_ADDR, | |
4394 | }; | |
4395 | ||
234b27c3 ED |
4396 | /* called with rcu_read_lock() */ |
4397 | static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb, | |
4398 | struct netlink_callback *cb, enum addr_type_t type, | |
4399 | int s_ip_idx, int *p_ip_idx) | |
4400 | { | |
234b27c3 ED |
4401 | struct ifmcaddr6 *ifmca; |
4402 | struct ifacaddr6 *ifaca; | |
4403 | int err = 1; | |
4404 | int ip_idx = *p_ip_idx; | |
4405 | ||
4406 | read_lock_bh(&idev->lock); | |
4407 | switch (type) { | |
502a2ffd | 4408 | case UNICAST_ADDR: { |
4409 | struct inet6_ifaddr *ifa; | |
4410 | ||
234b27c3 | 4411 | /* unicast address incl. temp addr */ |
502a2ffd | 4412 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
4413 | if (++ip_idx < s_ip_idx) | |
234b27c3 ED |
4414 | continue; |
4415 | err = inet6_fill_ifaddr(skb, ifa, | |
15e47304 | 4416 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4417 | cb->nlh->nlmsg_seq, |
4418 | RTM_NEWADDR, | |
4419 | NLM_F_MULTI); | |
053c095a | 4420 | if (err < 0) |
234b27c3 | 4421 | break; |
63998ac2 | 4422 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
234b27c3 ED |
4423 | } |
4424 | break; | |
502a2ffd | 4425 | } |
234b27c3 ED |
4426 | case MULTICAST_ADDR: |
4427 | /* multicast address */ | |
4428 | for (ifmca = idev->mc_list; ifmca; | |
4429 | ifmca = ifmca->next, ip_idx++) { | |
4430 | if (ip_idx < s_ip_idx) | |
4431 | continue; | |
4432 | err = inet6_fill_ifmcaddr(skb, ifmca, | |
15e47304 | 4433 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4434 | cb->nlh->nlmsg_seq, |
4435 | RTM_GETMULTICAST, | |
4436 | NLM_F_MULTI); | |
053c095a | 4437 | if (err < 0) |
234b27c3 ED |
4438 | break; |
4439 | } | |
4440 | break; | |
4441 | case ANYCAST_ADDR: | |
4442 | /* anycast address */ | |
4443 | for (ifaca = idev->ac_list; ifaca; | |
4444 | ifaca = ifaca->aca_next, ip_idx++) { | |
4445 | if (ip_idx < s_ip_idx) | |
4446 | continue; | |
4447 | err = inet6_fill_ifacaddr(skb, ifaca, | |
15e47304 | 4448 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4449 | cb->nlh->nlmsg_seq, |
4450 | RTM_GETANYCAST, | |
4451 | NLM_F_MULTI); | |
053c095a | 4452 | if (err < 0) |
234b27c3 ED |
4453 | break; |
4454 | } | |
4455 | break; | |
4456 | default: | |
4457 | break; | |
4458 | } | |
4459 | read_unlock_bh(&idev->lock); | |
4460 | *p_ip_idx = ip_idx; | |
4461 | return err; | |
4462 | } | |
4463 | ||
1da177e4 LT |
4464 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, |
4465 | enum addr_type_t type) | |
4466 | { | |
234b27c3 ED |
4467 | struct net *net = sock_net(skb->sk); |
4468 | int h, s_h; | |
1da177e4 LT |
4469 | int idx, ip_idx; |
4470 | int s_idx, s_ip_idx; | |
1da177e4 | 4471 | struct net_device *dev; |
234b27c3 ED |
4472 | struct inet6_dev *idev; |
4473 | struct hlist_head *head; | |
1ab1457c | 4474 | |
234b27c3 ED |
4475 | s_h = cb->args[0]; |
4476 | s_idx = idx = cb->args[1]; | |
4477 | s_ip_idx = ip_idx = cb->args[2]; | |
5d5619b4 | 4478 | |
234b27c3 | 4479 | rcu_read_lock(); |
63998ac2 | 4480 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ net->dev_base_seq; |
234b27c3 ED |
4481 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
4482 | idx = 0; | |
4483 | head = &net->dev_index_head[h]; | |
b67bfe0d | 4484 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
234b27c3 ED |
4485 | if (idx < s_idx) |
4486 | goto cont; | |
4b97efdf | 4487 | if (h > s_h || idx > s_idx) |
234b27c3 ED |
4488 | s_ip_idx = 0; |
4489 | ip_idx = 0; | |
e21e8467 SH |
4490 | idev = __in6_dev_get(dev); |
4491 | if (!idev) | |
234b27c3 ED |
4492 | goto cont; |
4493 | ||
4494 | if (in6_dump_addrs(idev, skb, cb, type, | |
7b46a644 | 4495 | s_ip_idx, &ip_idx) < 0) |
234b27c3 | 4496 | goto done; |
7562f876 | 4497 | cont: |
234b27c3 ED |
4498 | idx++; |
4499 | } | |
1da177e4 | 4500 | } |
234b27c3 ED |
4501 | done: |
4502 | rcu_read_unlock(); | |
4503 | cb->args[0] = h; | |
4504 | cb->args[1] = idx; | |
4505 | cb->args[2] = ip_idx; | |
4506 | ||
1da177e4 LT |
4507 | return skb->len; |
4508 | } | |
4509 | ||
4510 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4511 | { | |
4512 | enum addr_type_t type = UNICAST_ADDR; | |
b854272b | 4513 | |
1da177e4 LT |
4514 | return inet6_dump_addr(skb, cb, type); |
4515 | } | |
4516 | ||
4517 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4518 | { | |
4519 | enum addr_type_t type = MULTICAST_ADDR; | |
b854272b | 4520 | |
1da177e4 LT |
4521 | return inet6_dump_addr(skb, cb, type); |
4522 | } | |
4523 | ||
4524 | ||
4525 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4526 | { | |
4527 | enum addr_type_t type = ANYCAST_ADDR; | |
b854272b | 4528 | |
1da177e4 LT |
4529 | return inet6_dump_addr(skb, cb, type); |
4530 | } | |
4531 | ||
661d2967 | 4532 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh) |
6c223828 | 4533 | { |
3b1e0a65 | 4534 | struct net *net = sock_net(in_skb->sk); |
1b29fc2c TG |
4535 | struct ifaddrmsg *ifm; |
4536 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 4537 | struct in6_addr *addr = NULL, *peer; |
6c223828 NT |
4538 | struct net_device *dev = NULL; |
4539 | struct inet6_ifaddr *ifa; | |
4540 | struct sk_buff *skb; | |
6c223828 NT |
4541 | int err; |
4542 | ||
1b29fc2c TG |
4543 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
4544 | if (err < 0) | |
4545 | goto errout; | |
4546 | ||
caeaba79 | 4547 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer); |
63159f29 | 4548 | if (!addr) { |
1b29fc2c TG |
4549 | err = -EINVAL; |
4550 | goto errout; | |
6c223828 | 4551 | } |
6c223828 | 4552 | |
1b29fc2c | 4553 | ifm = nlmsg_data(nlh); |
6c223828 | 4554 | if (ifm->ifa_index) |
6fda7350 | 4555 | dev = __dev_get_by_index(net, ifm->ifa_index); |
6c223828 | 4556 | |
e21e8467 SH |
4557 | ifa = ipv6_get_ifaddr(net, addr, dev, 1); |
4558 | if (!ifa) { | |
1b29fc2c TG |
4559 | err = -EADDRNOTAVAIL; |
4560 | goto errout; | |
4561 | } | |
6c223828 | 4562 | |
e21e8467 SH |
4563 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL); |
4564 | if (!skb) { | |
6c223828 | 4565 | err = -ENOBUFS; |
1b29fc2c | 4566 | goto errout_ifa; |
6c223828 NT |
4567 | } |
4568 | ||
15e47304 | 4569 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).portid, |
6c223828 | 4570 | nlh->nlmsg_seq, RTM_NEWADDR, 0); |
26932566 PM |
4571 | if (err < 0) { |
4572 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
4573 | WARN_ON(err == -EMSGSIZE); | |
4574 | kfree_skb(skb); | |
4575 | goto errout_ifa; | |
4576 | } | |
15e47304 | 4577 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); |
1b29fc2c | 4578 | errout_ifa: |
6c223828 | 4579 | in6_ifa_put(ifa); |
1b29fc2c | 4580 | errout: |
6c223828 | 4581 | return err; |
6c223828 NT |
4582 | } |
4583 | ||
1da177e4 LT |
4584 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
4585 | { | |
4586 | struct sk_buff *skb; | |
c346dca1 | 4587 | struct net *net = dev_net(ifa->idev->dev); |
5d620266 | 4588 | int err = -ENOBUFS; |
1da177e4 | 4589 | |
0ab6803b | 4590 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
63159f29 | 4591 | if (!skb) |
5d620266 TG |
4592 | goto errout; |
4593 | ||
4594 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
4595 | if (err < 0) { |
4596 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
4597 | WARN_ON(err == -EMSGSIZE); | |
4598 | kfree_skb(skb); | |
4599 | goto errout; | |
4600 | } | |
1ce85fe4 PNA |
4601 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
4602 | return; | |
5d620266 TG |
4603 | errout: |
4604 | if (err < 0) | |
6fda7350 | 4605 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
4606 | } |
4607 | ||
b6f99a21 | 4608 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
4609 | __s32 *array, int bytes) |
4610 | { | |
04561c1f TG |
4611 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
4612 | ||
1da177e4 LT |
4613 | memset(array, 0, bytes); |
4614 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
4615 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
4616 | array[DEVCONF_MTU6] = cnf->mtu6; | |
4617 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
4618 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
4619 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
4620 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
4621 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
93908d19 TG |
4622 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = |
4623 | jiffies_to_msecs(cnf->rtr_solicit_interval); | |
4624 | array[DEVCONF_RTR_SOLICIT_DELAY] = | |
4625 | jiffies_to_msecs(cnf->rtr_solicit_delay); | |
1da177e4 | 4626 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; |
fc4eba58 HFS |
4627 | array[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL] = |
4628 | jiffies_to_msecs(cnf->mldv1_unsolicited_report_interval); | |
4629 | array[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL] = | |
4630 | jiffies_to_msecs(cnf->mldv2_unsolicited_report_interval); | |
1da177e4 LT |
4631 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; |
4632 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
4633 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
4634 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
4635 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
1da177e4 | 4636 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; |
65f5c7c1 | 4637 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
8013d1d7 | 4638 | array[DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT] = cnf->accept_ra_min_hop_limit; |
c4fd30eb | 4639 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
4640 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4641 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
93908d19 TG |
4642 | array[DEVCONF_RTR_PROBE_INTERVAL] = |
4643 | jiffies_to_msecs(cnf->rtr_probe_interval); | |
fa03ef38 | 4644 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
4645 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
4646 | #endif | |
930d6ff2 | 4647 | #endif |
fbea49e1 | 4648 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 4649 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
4650 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4651 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
7fd2561e | 4652 | array[DEVCONF_USE_OPTIMISTIC] = cnf->use_optimistic; |
95c385b4 | 4653 | #endif |
7bc570c8 YH |
4654 | #ifdef CONFIG_IPV6_MROUTE |
4655 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; | |
4656 | #endif | |
778d80be | 4657 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
1b34be74 | 4658 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
c3faca05 | 4659 | array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao; |
5cb04436 | 4660 | array[DEVCONF_NDISC_NOTIFY] = cnf->ndisc_notify; |
b800c3b9 | 4661 | array[DEVCONF_SUPPRESS_FRAG_NDISC] = cnf->suppress_frag_ndisc; |
d9333196 | 4662 | array[DEVCONF_ACCEPT_RA_FROM_LOCAL] = cnf->accept_ra_from_local; |
c2943f14 | 4663 | array[DEVCONF_ACCEPT_RA_MTU] = cnf->accept_ra_mtu; |
35103d11 | 4664 | array[DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN] = cnf->ignore_routes_with_linkdown; |
3d1bec99 | 4665 | /* we omit DEVCONF_STABLE_SECRET for now */ |
3985e8a3 | 4666 | array[DEVCONF_USE_OIF_ADDRS_ONLY] = cnf->use_oif_addrs_only; |
1da177e4 LT |
4667 | } |
4668 | ||
b382b191 TG |
4669 | static inline size_t inet6_ifla6_size(void) |
4670 | { | |
4671 | return nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
4672 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
4673 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
4674 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ | |
f53adae4 DB |
4675 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ |
4676 | + nla_total_size(sizeof(struct in6_addr)); /* IFLA_INET6_TOKEN */ | |
b382b191 TG |
4677 | } |
4678 | ||
339bf98f TG |
4679 | static inline size_t inet6_if_nlmsg_size(void) |
4680 | { | |
4681 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
4682 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
4683 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
4684 | + nla_total_size(4) /* IFLA_MTU */ | |
4685 | + nla_total_size(4) /* IFLA_LINK */ | |
0344338b | 4686 | + nla_total_size(1) /* IFLA_OPERSTATE */ |
b382b191 | 4687 | + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */ |
339bf98f | 4688 | } |
c5396a31 | 4689 | |
be281e55 | 4690 | static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib, |
7d720c3e | 4691 | int items, int bytes) |
7f7d9a6b HX |
4692 | { |
4693 | int i; | |
4694 | int pad = bytes - sizeof(u64) * items; | |
4695 | BUG_ON(pad < 0); | |
4696 | ||
4697 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
4698 | put_unaligned(items, &stats[0]); | |
4699 | for (i = 1; i < items; i++) | |
be281e55 | 4700 | put_unaligned(atomic_long_read(&mib[i]), &stats[i]); |
7f7d9a6b HX |
4701 | |
4702 | memset(&stats[items], 0, pad); | |
4703 | } | |
4704 | ||
698365fa | 4705 | static inline void __snmp6_fill_stats64(u64 *stats, void __percpu *mib, |
a3a77372 | 4706 | int bytes, size_t syncpoff) |
4ce3c183 | 4707 | { |
a3a77372 R |
4708 | int i, c; |
4709 | u64 buff[IPSTATS_MIB_MAX]; | |
4710 | int pad = bytes - sizeof(u64) * IPSTATS_MIB_MAX; | |
4711 | ||
4ce3c183 ED |
4712 | BUG_ON(pad < 0); |
4713 | ||
a3a77372 R |
4714 | memset(buff, 0, sizeof(buff)); |
4715 | buff[0] = IPSTATS_MIB_MAX; | |
4ce3c183 | 4716 | |
a3a77372 R |
4717 | for_each_possible_cpu(c) { |
4718 | for (i = 1; i < IPSTATS_MIB_MAX; i++) | |
4719 | buff[i] += snmp_get_cpu_field64(mib, c, i, syncpoff); | |
4720 | } | |
4721 | ||
4722 | memcpy(stats, buff, IPSTATS_MIB_MAX * sizeof(u64)); | |
4723 | memset(&stats[IPSTATS_MIB_MAX], 0, pad); | |
4ce3c183 ED |
4724 | } |
4725 | ||
7f7d9a6b HX |
4726 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, |
4727 | int bytes) | |
4728 | { | |
e21e8467 | 4729 | switch (attrtype) { |
7f7d9a6b | 4730 | case IFLA_INET6_STATS: |
a3a77372 R |
4731 | __snmp6_fill_stats64(stats, idev->stats.ipv6, bytes, |
4732 | offsetof(struct ipstats_mib, syncp)); | |
7f7d9a6b HX |
4733 | break; |
4734 | case IFLA_INET6_ICMP6STATS: | |
be281e55 | 4735 | __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, ICMP6_MIB_MAX, bytes); |
7f7d9a6b HX |
4736 | break; |
4737 | } | |
4738 | } | |
4739 | ||
d5566fd7 SV |
4740 | static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev, |
4741 | u32 ext_filter_mask) | |
b382b191 TG |
4742 | { |
4743 | struct nlattr *nla; | |
4744 | struct ifla_cacheinfo ci; | |
4745 | ||
c78679e8 DM |
4746 | if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags)) |
4747 | goto nla_put_failure; | |
b382b191 | 4748 | ci.max_reasm_len = IPV6_MAXPLEN; |
24912420 DM |
4749 | ci.tstamp = cstamp_delta(idev->tstamp); |
4750 | ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time); | |
1f9248e5 | 4751 | ci.retrans_time = jiffies_to_msecs(NEIGH_VAR(idev->nd_parms, RETRANS_TIME)); |
c78679e8 DM |
4752 | if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci)) |
4753 | goto nla_put_failure; | |
b382b191 | 4754 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
63159f29 | 4755 | if (!nla) |
b382b191 TG |
4756 | goto nla_put_failure; |
4757 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); | |
4758 | ||
4759 | /* XXX - MC not implemented */ | |
4760 | ||
d5566fd7 SV |
4761 | if (ext_filter_mask & RTEXT_FILTER_SKIP_STATS) |
4762 | return 0; | |
4763 | ||
b382b191 | 4764 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); |
63159f29 | 4765 | if (!nla) |
b382b191 TG |
4766 | goto nla_put_failure; |
4767 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
4768 | ||
4769 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
63159f29 | 4770 | if (!nla) |
b382b191 TG |
4771 | goto nla_put_failure; |
4772 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
4773 | ||
f53adae4 | 4774 | nla = nla_reserve(skb, IFLA_INET6_TOKEN, sizeof(struct in6_addr)); |
63159f29 | 4775 | if (!nla) |
f53adae4 | 4776 | goto nla_put_failure; |
bc91b0f0 JP |
4777 | |
4778 | if (nla_put_u8(skb, IFLA_INET6_ADDR_GEN_MODE, idev->addr_gen_mode)) | |
4779 | goto nla_put_failure; | |
4780 | ||
f53adae4 DB |
4781 | read_lock_bh(&idev->lock); |
4782 | memcpy(nla_data(nla), idev->token.s6_addr, nla_len(nla)); | |
4783 | read_unlock_bh(&idev->lock); | |
4784 | ||
b382b191 TG |
4785 | return 0; |
4786 | ||
4787 | nla_put_failure: | |
4788 | return -EMSGSIZE; | |
4789 | } | |
4790 | ||
4791 | static size_t inet6_get_link_af_size(const struct net_device *dev) | |
4792 | { | |
4793 | if (!__in6_dev_get(dev)) | |
4794 | return 0; | |
4795 | ||
4796 | return inet6_ifla6_size(); | |
4797 | } | |
4798 | ||
d5566fd7 SV |
4799 | static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev, |
4800 | u32 ext_filter_mask) | |
b382b191 TG |
4801 | { |
4802 | struct inet6_dev *idev = __in6_dev_get(dev); | |
4803 | ||
4804 | if (!idev) | |
4805 | return -ENODATA; | |
4806 | ||
d5566fd7 | 4807 | if (inet6_fill_ifla6_attrs(skb, idev, ext_filter_mask) < 0) |
b382b191 TG |
4808 | return -EMSGSIZE; |
4809 | ||
4810 | return 0; | |
4811 | } | |
4812 | ||
f53adae4 DB |
4813 | static int inet6_set_iftoken(struct inet6_dev *idev, struct in6_addr *token) |
4814 | { | |
f53adae4 DB |
4815 | struct inet6_ifaddr *ifp; |
4816 | struct net_device *dev = idev->dev; | |
fc403832 | 4817 | bool update_rs = false; |
dc848292 | 4818 | struct in6_addr ll_addr; |
f53adae4 | 4819 | |
c15b1cca HFS |
4820 | ASSERT_RTNL(); |
4821 | ||
63159f29 | 4822 | if (!token) |
f53adae4 DB |
4823 | return -EINVAL; |
4824 | if (ipv6_addr_any(token)) | |
4825 | return -EINVAL; | |
4826 | if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) | |
4827 | return -EINVAL; | |
f53adae4 DB |
4828 | if (!ipv6_accept_ra(idev)) |
4829 | return -EINVAL; | |
4830 | if (idev->cnf.rtr_solicits <= 0) | |
4831 | return -EINVAL; | |
4832 | ||
4833 | write_lock_bh(&idev->lock); | |
4834 | ||
4835 | BUILD_BUG_ON(sizeof(token->s6_addr) != 16); | |
4836 | memcpy(idev->token.s6_addr + 8, token->s6_addr + 8, 8); | |
4837 | ||
4838 | write_unlock_bh(&idev->lock); | |
4839 | ||
dc848292 HFS |
4840 | if (!idev->dead && (idev->if_flags & IF_READY) && |
4841 | !ipv6_get_lladdr(dev, &ll_addr, IFA_F_TENTATIVE | | |
4842 | IFA_F_OPTIMISTIC)) { | |
fc403832 DB |
4843 | |
4844 | /* If we're not ready, then normal ifup will take care | |
4845 | * of this. Otherwise, we need to request our rs here. | |
4846 | */ | |
4847 | ndisc_send_rs(dev, &ll_addr, &in6addr_linklocal_allrouters); | |
4848 | update_rs = true; | |
4849 | } | |
f53adae4 DB |
4850 | |
4851 | write_lock_bh(&idev->lock); | |
fc403832 | 4852 | |
77ecaace | 4853 | if (update_rs) { |
fc403832 | 4854 | idev->if_flags |= IF_RS_SENT; |
77ecaace HFS |
4855 | idev->rs_probes = 1; |
4856 | addrconf_mod_rs_timer(idev, idev->cnf.rtr_solicit_interval); | |
4857 | } | |
f53adae4 DB |
4858 | |
4859 | /* Well, that's kinda nasty ... */ | |
4860 | list_for_each_entry(ifp, &idev->addr_list, if_list) { | |
4861 | spin_lock(&ifp->lock); | |
617fe29d | 4862 | if (ifp->tokenized) { |
f53adae4 DB |
4863 | ifp->valid_lft = 0; |
4864 | ifp->prefered_lft = 0; | |
4865 | } | |
4866 | spin_unlock(&ifp->lock); | |
4867 | } | |
4868 | ||
4869 | write_unlock_bh(&idev->lock); | |
b2ed64a9 | 4870 | inet6_ifinfo_notify(RTM_NEWLINK, idev); |
c15b1cca | 4871 | addrconf_verify_rtnl(); |
f53adae4 DB |
4872 | return 0; |
4873 | } | |
4874 | ||
11b1f828 DB |
4875 | static const struct nla_policy inet6_af_policy[IFLA_INET6_MAX + 1] = { |
4876 | [IFLA_INET6_ADDR_GEN_MODE] = { .type = NLA_U8 }, | |
4877 | [IFLA_INET6_TOKEN] = { .len = sizeof(struct in6_addr) }, | |
4878 | }; | |
4879 | ||
4880 | static int inet6_validate_link_af(const struct net_device *dev, | |
4881 | const struct nlattr *nla) | |
4882 | { | |
4883 | struct nlattr *tb[IFLA_INET6_MAX + 1]; | |
4884 | ||
4885 | if (dev && !__in6_dev_get(dev)) | |
4886 | return -EAFNOSUPPORT; | |
4887 | ||
4888 | return nla_parse_nested(tb, IFLA_INET6_MAX, nla, inet6_af_policy); | |
4889 | } | |
4890 | ||
f53adae4 DB |
4891 | static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla) |
4892 | { | |
4893 | int err = -EINVAL; | |
4894 | struct inet6_dev *idev = __in6_dev_get(dev); | |
4895 | struct nlattr *tb[IFLA_INET6_MAX + 1]; | |
4896 | ||
4897 | if (!idev) | |
4898 | return -EAFNOSUPPORT; | |
4899 | ||
4900 | if (nla_parse_nested(tb, IFLA_INET6_MAX, nla, NULL) < 0) | |
4901 | BUG(); | |
4902 | ||
bc91b0f0 | 4903 | if (tb[IFLA_INET6_TOKEN]) { |
f53adae4 | 4904 | err = inet6_set_iftoken(idev, nla_data(tb[IFLA_INET6_TOKEN])); |
bc91b0f0 JP |
4905 | if (err) |
4906 | return err; | |
4907 | } | |
4908 | ||
4909 | if (tb[IFLA_INET6_ADDR_GEN_MODE]) { | |
4910 | u8 mode = nla_get_u8(tb[IFLA_INET6_ADDR_GEN_MODE]); | |
4911 | ||
4912 | if (mode != IN6_ADDR_GEN_MODE_EUI64 && | |
622c81d5 HFS |
4913 | mode != IN6_ADDR_GEN_MODE_NONE && |
4914 | mode != IN6_ADDR_GEN_MODE_STABLE_PRIVACY) | |
4915 | return -EINVAL; | |
4916 | ||
4917 | if (mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY && | |
4918 | !idev->cnf.stable_secret.initialized && | |
4919 | !dev_net(dev)->ipv6.devconf_dflt->stable_secret.initialized) | |
bc91b0f0 | 4920 | return -EINVAL; |
622c81d5 | 4921 | |
bc91b0f0 JP |
4922 | idev->addr_gen_mode = mode; |
4923 | err = 0; | |
4924 | } | |
f53adae4 DB |
4925 | |
4926 | return err; | |
4927 | } | |
4928 | ||
1ab1457c | 4929 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 4930 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4931 | { |
04561c1f | 4932 | struct net_device *dev = idev->dev; |
04561c1f TG |
4933 | struct ifinfomsg *hdr; |
4934 | struct nlmsghdr *nlh; | |
4935 | void *protoinfo; | |
04561c1f | 4936 | |
15e47304 | 4937 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*hdr), flags); |
63159f29 | 4938 | if (!nlh) |
26932566 | 4939 | return -EMSGSIZE; |
04561c1f TG |
4940 | |
4941 | hdr = nlmsg_data(nlh); | |
4942 | hdr->ifi_family = AF_INET6; | |
4943 | hdr->__ifi_pad = 0; | |
4944 | hdr->ifi_type = dev->type; | |
4945 | hdr->ifi_index = dev->ifindex; | |
4946 | hdr->ifi_flags = dev_get_flags(dev); | |
4947 | hdr->ifi_change = 0; | |
4948 | ||
c78679e8 DM |
4949 | if (nla_put_string(skb, IFLA_IFNAME, dev->name) || |
4950 | (dev->addr_len && | |
4951 | nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || | |
4952 | nla_put_u32(skb, IFLA_MTU, dev->mtu) || | |
a54acb3a | 4953 | (dev->ifindex != dev_get_iflink(dev) && |
0344338b AG |
4954 | nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) || |
4955 | nla_put_u8(skb, IFLA_OPERSTATE, | |
4956 | netif_running(dev) ? dev->operstate : IF_OPER_DOWN)) | |
c78679e8 | 4957 | goto nla_put_failure; |
04561c1f | 4958 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
63159f29 | 4959 | if (!protoinfo) |
04561c1f | 4960 | goto nla_put_failure; |
1da177e4 | 4961 | |
d5566fd7 | 4962 | if (inet6_fill_ifla6_attrs(skb, idev, 0) < 0) |
bf99f1bd | 4963 | goto nla_put_failure; |
1da177e4 | 4964 | |
04561c1f | 4965 | nla_nest_end(skb, protoinfo); |
053c095a JB |
4966 | nlmsg_end(skb, nlh); |
4967 | return 0; | |
1da177e4 | 4968 | |
04561c1f | 4969 | nla_put_failure: |
26932566 PM |
4970 | nlmsg_cancel(skb, nlh); |
4971 | return -EMSGSIZE; | |
1da177e4 LT |
4972 | } |
4973 | ||
4974 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
4975 | { | |
3b1e0a65 | 4976 | struct net *net = sock_net(skb->sk); |
84d2697d | 4977 | int h, s_h; |
434a8a58 | 4978 | int idx = 0, s_idx; |
1da177e4 LT |
4979 | struct net_device *dev; |
4980 | struct inet6_dev *idev; | |
84d2697d | 4981 | struct hlist_head *head; |
1da177e4 | 4982 | |
84d2697d ED |
4983 | s_h = cb->args[0]; |
4984 | s_idx = cb->args[1]; | |
4985 | ||
4986 | rcu_read_lock(); | |
4987 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
4988 | idx = 0; | |
4989 | head = &net->dev_index_head[h]; | |
b67bfe0d | 4990 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
84d2697d ED |
4991 | if (idx < s_idx) |
4992 | goto cont; | |
4993 | idev = __in6_dev_get(dev); | |
4994 | if (!idev) | |
4995 | goto cont; | |
4996 | if (inet6_fill_ifinfo(skb, idev, | |
15e47304 | 4997 | NETLINK_CB(cb->skb).portid, |
84d2697d | 4998 | cb->nlh->nlmsg_seq, |
053c095a | 4999 | RTM_NEWLINK, NLM_F_MULTI) < 0) |
84d2697d | 5000 | goto out; |
7562f876 | 5001 | cont: |
84d2697d ED |
5002 | idx++; |
5003 | } | |
1da177e4 | 5004 | } |
84d2697d ED |
5005 | out: |
5006 | rcu_read_unlock(); | |
5007 | cb->args[1] = idx; | |
5008 | cb->args[0] = h; | |
1da177e4 LT |
5009 | |
5010 | return skb->len; | |
5011 | } | |
5012 | ||
5013 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
5014 | { | |
5015 | struct sk_buff *skb; | |
c346dca1 | 5016 | struct net *net = dev_net(idev->dev); |
8d7a76c9 | 5017 | int err = -ENOBUFS; |
1ab1457c | 5018 | |
339bf98f | 5019 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
63159f29 | 5020 | if (!skb) |
8d7a76c9 TG |
5021 | goto errout; |
5022 | ||
5023 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
5024 | if (err < 0) { |
5025 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
5026 | WARN_ON(err == -EMSGSIZE); | |
5027 | kfree_skb(skb); | |
5028 | goto errout; | |
5029 | } | |
5f75a104 | 5030 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC); |
1ce85fe4 | 5031 | return; |
8d7a76c9 TG |
5032 | errout: |
5033 | if (err < 0) | |
5f75a104 | 5034 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err); |
1da177e4 LT |
5035 | } |
5036 | ||
339bf98f TG |
5037 | static inline size_t inet6_prefix_nlmsg_size(void) |
5038 | { | |
5039 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
5040 | + nla_total_size(sizeof(struct in6_addr)) | |
5041 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
5042 | } | |
c5396a31 | 5043 | |
1da177e4 | 5044 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 5045 | struct prefix_info *pinfo, u32 portid, u32 seq, |
6051e2f4 | 5046 | int event, unsigned int flags) |
1da177e4 | 5047 | { |
6051e2f4 TG |
5048 | struct prefixmsg *pmsg; |
5049 | struct nlmsghdr *nlh; | |
1da177e4 LT |
5050 | struct prefix_cacheinfo ci; |
5051 | ||
15e47304 | 5052 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*pmsg), flags); |
63159f29 | 5053 | if (!nlh) |
26932566 | 5054 | return -EMSGSIZE; |
6051e2f4 TG |
5055 | |
5056 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 5057 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
5058 | pmsg->prefix_pad1 = 0; |
5059 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
5060 | pmsg->prefix_ifindex = idev->dev->ifindex; |
5061 | pmsg->prefix_len = pinfo->prefix_len; | |
5062 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 5063 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
5064 | pmsg->prefix_flags = 0; |
5065 | if (pinfo->onlink) | |
5066 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
5067 | if (pinfo->autoconf) | |
5068 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
5069 | ||
c78679e8 DM |
5070 | if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix)) |
5071 | goto nla_put_failure; | |
1da177e4 LT |
5072 | ci.preferred_time = ntohl(pinfo->prefered); |
5073 | ci.valid_time = ntohl(pinfo->valid); | |
c78679e8 DM |
5074 | if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci)) |
5075 | goto nla_put_failure; | |
053c095a JB |
5076 | nlmsg_end(skb, nlh); |
5077 | return 0; | |
1da177e4 | 5078 | |
6051e2f4 | 5079 | nla_put_failure: |
26932566 PM |
5080 | nlmsg_cancel(skb, nlh); |
5081 | return -EMSGSIZE; | |
1da177e4 LT |
5082 | } |
5083 | ||
1ab1457c | 5084 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
5085 | struct prefix_info *pinfo) |
5086 | { | |
5087 | struct sk_buff *skb; | |
c346dca1 | 5088 | struct net *net = dev_net(idev->dev); |
8c384bfa | 5089 | int err = -ENOBUFS; |
1da177e4 | 5090 | |
339bf98f | 5091 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
63159f29 | 5092 | if (!skb) |
8c384bfa TG |
5093 | goto errout; |
5094 | ||
5095 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
5096 | if (err < 0) { |
5097 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
5098 | WARN_ON(err == -EMSGSIZE); | |
5099 | kfree_skb(skb); | |
5100 | goto errout; | |
5101 | } | |
1ce85fe4 PNA |
5102 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
5103 | return; | |
8c384bfa TG |
5104 | errout: |
5105 | if (err < 0) | |
6fda7350 | 5106 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4 LT |
5107 | } |
5108 | ||
1da177e4 LT |
5109 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
5110 | { | |
63998ac2 ND |
5111 | struct net *net = dev_net(ifp->idev->dev); |
5112 | ||
c15b1cca HFS |
5113 | if (event) |
5114 | ASSERT_RTNL(); | |
5115 | ||
1da177e4 LT |
5116 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); |
5117 | ||
5118 | switch (event) { | |
5119 | case RTM_NEWADDR: | |
95c385b4 NH |
5120 | /* |
5121 | * If the address was optimistic | |
5122 | * we inserted the route at the start of | |
5123 | * our DAD process, so we don't need | |
5124 | * to do it again | |
5125 | */ | |
5126 | if (!(ifp->rt->rt6i_node)) | |
5127 | ip6_ins_rt(ifp->rt); | |
1da177e4 LT |
5128 | if (ifp->idev->cnf.forwarding) |
5129 | addrconf_join_anycast(ifp); | |
7996c799 | 5130 | if (!ipv6_addr_any(&ifp->peer_addr)) |
caeaba79 ND |
5131 | addrconf_prefix_route(&ifp->peer_addr, 128, |
5132 | ifp->idev->dev, 0, 0); | |
1da177e4 LT |
5133 | break; |
5134 | case RTM_DELADDR: | |
5135 | if (ifp->idev->cnf.forwarding) | |
5136 | addrconf_leave_anycast(ifp); | |
5137 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
7996c799 | 5138 | if (!ipv6_addr_any(&ifp->peer_addr)) { |
caeaba79 | 5139 | struct rt6_info *rt; |
caeaba79 | 5140 | |
e7478dfc ND |
5141 | rt = addrconf_get_prefix_route(&ifp->peer_addr, 128, |
5142 | ifp->idev->dev, 0, 0); | |
8e3d5be7 MKL |
5143 | if (rt) |
5144 | ip6_del_rt(rt); | |
caeaba79 | 5145 | } |
d8d1f30b | 5146 | dst_hold(&ifp->rt->dst); |
93fa159a | 5147 | |
8e3d5be7 | 5148 | ip6_del_rt(ifp->rt); |
705f1c86 HFS |
5149 | |
5150 | rt_genid_bump_ipv6(net); | |
1da177e4 LT |
5151 | break; |
5152 | } | |
63998ac2 | 5153 | atomic_inc(&net->ipv6.dev_addr_genid); |
1da177e4 LT |
5154 | } |
5155 | ||
5156 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
5157 | { | |
8814c4b5 | 5158 | rcu_read_lock_bh(); |
1da177e4 LT |
5159 | if (likely(ifp->idev->dead == 0)) |
5160 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 5161 | rcu_read_unlock_bh(); |
1da177e4 LT |
5162 | } |
5163 | ||
5164 | #ifdef CONFIG_SYSCTL | |
5165 | ||
5166 | static | |
fe2c6338 | 5167 | int addrconf_sysctl_forward(struct ctl_table *ctl, int write, |
1da177e4 LT |
5168 | void __user *buffer, size_t *lenp, loff_t *ppos) |
5169 | { | |
5170 | int *valp = ctl->data; | |
5171 | int val = *valp; | |
88af182e | 5172 | loff_t pos = *ppos; |
fe2c6338 | 5173 | struct ctl_table lctl; |
1da177e4 LT |
5174 | int ret; |
5175 | ||
013d97e9 FR |
5176 | /* |
5177 | * ctl->data points to idev->cnf.forwarding, we should | |
5178 | * not modify it until we get the rtnl lock. | |
5179 | */ | |
5180 | lctl = *ctl; | |
5181 | lctl.data = &val; | |
5182 | ||
5183 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
1da177e4 | 5184 | |
c8fecf22 | 5185 | if (write) |
b325fddb | 5186 | ret = addrconf_fixup_forwarding(ctl, valp, val); |
88af182e EB |
5187 | if (ret) |
5188 | *ppos = pos; | |
1ab1457c | 5189 | return ret; |
1da177e4 LT |
5190 | } |
5191 | ||
77751427 ML |
5192 | static |
5193 | int addrconf_sysctl_mtu(struct ctl_table *ctl, int write, | |
5194 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
5195 | { | |
5196 | struct inet6_dev *idev = ctl->extra1; | |
5197 | int min_mtu = IPV6_MIN_MTU; | |
5198 | struct ctl_table lctl; | |
5199 | ||
5200 | lctl = *ctl; | |
5201 | lctl.extra1 = &min_mtu; | |
5202 | lctl.extra2 = idev ? &idev->dev->mtu : NULL; | |
5203 | ||
5204 | return proc_dointvec_minmax(&lctl, write, buffer, lenp, ppos); | |
5205 | } | |
5206 | ||
56d417b1 BH |
5207 | static void dev_disable_change(struct inet6_dev *idev) |
5208 | { | |
75538c2b CW |
5209 | struct netdev_notifier_info info; |
5210 | ||
56d417b1 BH |
5211 | if (!idev || !idev->dev) |
5212 | return; | |
5213 | ||
75538c2b | 5214 | netdev_notifier_info_init(&info, idev->dev); |
56d417b1 | 5215 | if (idev->cnf.disable_ipv6) |
75538c2b | 5216 | addrconf_notify(NULL, NETDEV_DOWN, &info); |
56d417b1 | 5217 | else |
75538c2b | 5218 | addrconf_notify(NULL, NETDEV_UP, &info); |
56d417b1 BH |
5219 | } |
5220 | ||
5221 | static void addrconf_disable_change(struct net *net, __s32 newf) | |
5222 | { | |
5223 | struct net_device *dev; | |
5224 | struct inet6_dev *idev; | |
5225 | ||
c6d14c84 ED |
5226 | rcu_read_lock(); |
5227 | for_each_netdev_rcu(net, dev) { | |
56d417b1 BH |
5228 | idev = __in6_dev_get(dev); |
5229 | if (idev) { | |
5230 | int changed = (!idev->cnf.disable_ipv6) ^ (!newf); | |
5231 | idev->cnf.disable_ipv6 = newf; | |
5232 | if (changed) | |
5233 | dev_disable_change(idev); | |
5234 | } | |
56d417b1 | 5235 | } |
c6d14c84 | 5236 | rcu_read_unlock(); |
56d417b1 BH |
5237 | } |
5238 | ||
013d97e9 | 5239 | static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf) |
56d417b1 BH |
5240 | { |
5241 | struct net *net; | |
013d97e9 FR |
5242 | int old; |
5243 | ||
5244 | if (!rtnl_trylock()) | |
5245 | return restart_syscall(); | |
56d417b1 BH |
5246 | |
5247 | net = (struct net *)table->extra2; | |
013d97e9 FR |
5248 | old = *p; |
5249 | *p = newf; | |
56d417b1 | 5250 | |
013d97e9 FR |
5251 | if (p == &net->ipv6.devconf_dflt->disable_ipv6) { |
5252 | rtnl_unlock(); | |
56d417b1 | 5253 | return 0; |
88af182e | 5254 | } |
56d417b1 BH |
5255 | |
5256 | if (p == &net->ipv6.devconf_all->disable_ipv6) { | |
56d417b1 BH |
5257 | net->ipv6.devconf_dflt->disable_ipv6 = newf; |
5258 | addrconf_disable_change(net, newf); | |
013d97e9 | 5259 | } else if ((!newf) ^ (!old)) |
56d417b1 BH |
5260 | dev_disable_change((struct inet6_dev *)table->extra1); |
5261 | ||
5262 | rtnl_unlock(); | |
5263 | return 0; | |
5264 | } | |
5265 | ||
5266 | static | |
fe2c6338 | 5267 | int addrconf_sysctl_disable(struct ctl_table *ctl, int write, |
56d417b1 BH |
5268 | void __user *buffer, size_t *lenp, loff_t *ppos) |
5269 | { | |
5270 | int *valp = ctl->data; | |
5271 | int val = *valp; | |
88af182e | 5272 | loff_t pos = *ppos; |
fe2c6338 | 5273 | struct ctl_table lctl; |
56d417b1 BH |
5274 | int ret; |
5275 | ||
013d97e9 FR |
5276 | /* |
5277 | * ctl->data points to idev->cnf.disable_ipv6, we should | |
5278 | * not modify it until we get the rtnl lock. | |
5279 | */ | |
5280 | lctl = *ctl; | |
5281 | lctl.data = &val; | |
5282 | ||
5283 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
56d417b1 BH |
5284 | |
5285 | if (write) | |
5286 | ret = addrconf_disable_ipv6(ctl, valp, val); | |
88af182e EB |
5287 | if (ret) |
5288 | *ppos = pos; | |
56d417b1 BH |
5289 | return ret; |
5290 | } | |
5291 | ||
c92d5491 | 5292 | static |
5293 | int addrconf_sysctl_proxy_ndp(struct ctl_table *ctl, int write, | |
5294 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
5295 | { | |
5296 | int *valp = ctl->data; | |
5297 | int ret; | |
5298 | int old, new; | |
5299 | ||
5300 | old = *valp; | |
5301 | ret = proc_dointvec(ctl, write, buffer, lenp, ppos); | |
5302 | new = *valp; | |
5303 | ||
5304 | if (write && old != new) { | |
5305 | struct net *net = ctl->extra2; | |
5306 | ||
5307 | if (!rtnl_trylock()) | |
5308 | return restart_syscall(); | |
5309 | ||
5310 | if (valp == &net->ipv6.devconf_dflt->proxy_ndp) | |
5311 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, | |
5312 | NETCONFA_IFINDEX_DEFAULT, | |
5313 | net->ipv6.devconf_dflt); | |
5314 | else if (valp == &net->ipv6.devconf_all->proxy_ndp) | |
5315 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, | |
5316 | NETCONFA_IFINDEX_ALL, | |
5317 | net->ipv6.devconf_all); | |
5318 | else { | |
5319 | struct inet6_dev *idev = ctl->extra1; | |
5320 | ||
5321 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, | |
5322 | idev->dev->ifindex, | |
5323 | &idev->cnf); | |
5324 | } | |
5325 | rtnl_unlock(); | |
5326 | } | |
5327 | ||
5328 | return ret; | |
5329 | } | |
5330 | ||
3d1bec99 HFS |
5331 | static int addrconf_sysctl_stable_secret(struct ctl_table *ctl, int write, |
5332 | void __user *buffer, size_t *lenp, | |
5333 | loff_t *ppos) | |
5334 | { | |
5335 | int err; | |
5336 | struct in6_addr addr; | |
5337 | char str[IPV6_MAX_STRLEN]; | |
5338 | struct ctl_table lctl = *ctl; | |
622c81d5 | 5339 | struct net *net = ctl->extra2; |
3d1bec99 HFS |
5340 | struct ipv6_stable_secret *secret = ctl->data; |
5341 | ||
622c81d5 HFS |
5342 | if (&net->ipv6.devconf_all->stable_secret == ctl->data) |
5343 | return -EIO; | |
5344 | ||
3d1bec99 HFS |
5345 | lctl.maxlen = IPV6_MAX_STRLEN; |
5346 | lctl.data = str; | |
5347 | ||
5348 | if (!rtnl_trylock()) | |
5349 | return restart_syscall(); | |
5350 | ||
5351 | if (!write && !secret->initialized) { | |
5352 | err = -EIO; | |
5353 | goto out; | |
5354 | } | |
5355 | ||
5356 | if (!write) { | |
5357 | err = snprintf(str, sizeof(str), "%pI6", | |
5358 | &secret->secret); | |
5359 | if (err >= sizeof(str)) { | |
5360 | err = -EIO; | |
5361 | goto out; | |
5362 | } | |
5363 | } | |
5364 | ||
5365 | err = proc_dostring(&lctl, write, buffer, lenp, ppos); | |
5366 | if (err || !write) | |
5367 | goto out; | |
5368 | ||
5369 | if (in6_pton(str, -1, addr.in6_u.u6_addr8, -1, NULL) != 1) { | |
5370 | err = -EIO; | |
5371 | goto out; | |
5372 | } | |
5373 | ||
5374 | secret->initialized = true; | |
5375 | secret->secret = addr; | |
5376 | ||
622c81d5 HFS |
5377 | if (&net->ipv6.devconf_dflt->stable_secret == ctl->data) { |
5378 | struct net_device *dev; | |
5379 | ||
5380 | for_each_netdev(net, dev) { | |
5381 | struct inet6_dev *idev = __in6_dev_get(dev); | |
5382 | ||
5383 | if (idev) { | |
5384 | idev->addr_gen_mode = | |
5385 | IN6_ADDR_GEN_MODE_STABLE_PRIVACY; | |
5386 | } | |
5387 | } | |
5388 | } else { | |
5389 | struct inet6_dev *idev = ctl->extra1; | |
5390 | ||
5391 | idev->addr_gen_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY; | |
5392 | } | |
5393 | ||
3d1bec99 HFS |
5394 | out: |
5395 | rtnl_unlock(); | |
5396 | ||
5397 | return err; | |
5398 | } | |
c92d5491 | 5399 | |
35103d11 AG |
5400 | static |
5401 | int addrconf_sysctl_ignore_routes_with_linkdown(struct ctl_table *ctl, | |
5402 | int write, | |
5403 | void __user *buffer, | |
5404 | size_t *lenp, | |
5405 | loff_t *ppos) | |
5406 | { | |
5407 | int *valp = ctl->data; | |
5408 | int val = *valp; | |
5409 | loff_t pos = *ppos; | |
5410 | struct ctl_table lctl; | |
5411 | int ret; | |
5412 | ||
5413 | /* ctl->data points to idev->cnf.ignore_routes_when_linkdown | |
5414 | * we should not modify it until we get the rtnl lock. | |
5415 | */ | |
5416 | lctl = *ctl; | |
5417 | lctl.data = &val; | |
5418 | ||
5419 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
5420 | ||
5421 | if (write) | |
5422 | ret = addrconf_fixup_linkdown(ctl, valp, val); | |
5423 | if (ret) | |
5424 | *ppos = pos; | |
5425 | return ret; | |
5426 | } | |
5427 | ||
1da177e4 LT |
5428 | static struct addrconf_sysctl_table |
5429 | { | |
5430 | struct ctl_table_header *sysctl_header; | |
fe2c6338 | 5431 | struct ctl_table addrconf_vars[DEVCONF_MAX+1]; |
ab32ea5d | 5432 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
5433 | .sysctl_header = NULL, |
5434 | .addrconf_vars = { | |
1ab1457c | 5435 | { |
e21e8467 SH |
5436 | .procname = "forwarding", |
5437 | .data = &ipv6_devconf.forwarding, | |
5438 | .maxlen = sizeof(int), | |
5439 | .mode = 0644, | |
5440 | .proc_handler = addrconf_sysctl_forward, | |
1da177e4 LT |
5441 | }, |
5442 | { | |
e21e8467 SH |
5443 | .procname = "hop_limit", |
5444 | .data = &ipv6_devconf.hop_limit, | |
5445 | .maxlen = sizeof(int), | |
5446 | .mode = 0644, | |
5447 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5448 | }, |
5449 | { | |
e21e8467 SH |
5450 | .procname = "mtu", |
5451 | .data = &ipv6_devconf.mtu6, | |
5452 | .maxlen = sizeof(int), | |
5453 | .mode = 0644, | |
77751427 | 5454 | .proc_handler = addrconf_sysctl_mtu, |
1da177e4 LT |
5455 | }, |
5456 | { | |
e21e8467 SH |
5457 | .procname = "accept_ra", |
5458 | .data = &ipv6_devconf.accept_ra, | |
5459 | .maxlen = sizeof(int), | |
5460 | .mode = 0644, | |
5461 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5462 | }, |
5463 | { | |
e21e8467 SH |
5464 | .procname = "accept_redirects", |
5465 | .data = &ipv6_devconf.accept_redirects, | |
5466 | .maxlen = sizeof(int), | |
5467 | .mode = 0644, | |
5468 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5469 | }, |
5470 | { | |
e21e8467 SH |
5471 | .procname = "autoconf", |
5472 | .data = &ipv6_devconf.autoconf, | |
5473 | .maxlen = sizeof(int), | |
5474 | .mode = 0644, | |
5475 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5476 | }, |
5477 | { | |
e21e8467 SH |
5478 | .procname = "dad_transmits", |
5479 | .data = &ipv6_devconf.dad_transmits, | |
5480 | .maxlen = sizeof(int), | |
5481 | .mode = 0644, | |
5482 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5483 | }, |
5484 | { | |
e21e8467 SH |
5485 | .procname = "router_solicitations", |
5486 | .data = &ipv6_devconf.rtr_solicits, | |
5487 | .maxlen = sizeof(int), | |
5488 | .mode = 0644, | |
5489 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5490 | }, |
5491 | { | |
e21e8467 SH |
5492 | .procname = "router_solicitation_interval", |
5493 | .data = &ipv6_devconf.rtr_solicit_interval, | |
5494 | .maxlen = sizeof(int), | |
5495 | .mode = 0644, | |
5496 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
5497 | }, |
5498 | { | |
e21e8467 SH |
5499 | .procname = "router_solicitation_delay", |
5500 | .data = &ipv6_devconf.rtr_solicit_delay, | |
5501 | .maxlen = sizeof(int), | |
5502 | .mode = 0644, | |
5503 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
5504 | }, |
5505 | { | |
e21e8467 SH |
5506 | .procname = "force_mld_version", |
5507 | .data = &ipv6_devconf.force_mld_version, | |
5508 | .maxlen = sizeof(int), | |
5509 | .mode = 0644, | |
5510 | .proc_handler = proc_dointvec, | |
1da177e4 | 5511 | }, |
fc4eba58 HFS |
5512 | { |
5513 | .procname = "mldv1_unsolicited_report_interval", | |
5514 | .data = | |
5515 | &ipv6_devconf.mldv1_unsolicited_report_interval, | |
5516 | .maxlen = sizeof(int), | |
5517 | .mode = 0644, | |
5518 | .proc_handler = proc_dointvec_ms_jiffies, | |
5519 | }, | |
5520 | { | |
5521 | .procname = "mldv2_unsolicited_report_interval", | |
5522 | .data = | |
5523 | &ipv6_devconf.mldv2_unsolicited_report_interval, | |
5524 | .maxlen = sizeof(int), | |
5525 | .mode = 0644, | |
5526 | .proc_handler = proc_dointvec_ms_jiffies, | |
5527 | }, | |
1da177e4 | 5528 | { |
e21e8467 SH |
5529 | .procname = "use_tempaddr", |
5530 | .data = &ipv6_devconf.use_tempaddr, | |
5531 | .maxlen = sizeof(int), | |
5532 | .mode = 0644, | |
5533 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5534 | }, |
5535 | { | |
e21e8467 SH |
5536 | .procname = "temp_valid_lft", |
5537 | .data = &ipv6_devconf.temp_valid_lft, | |
5538 | .maxlen = sizeof(int), | |
5539 | .mode = 0644, | |
5540 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5541 | }, |
5542 | { | |
e21e8467 SH |
5543 | .procname = "temp_prefered_lft", |
5544 | .data = &ipv6_devconf.temp_prefered_lft, | |
5545 | .maxlen = sizeof(int), | |
5546 | .mode = 0644, | |
5547 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5548 | }, |
5549 | { | |
e21e8467 SH |
5550 | .procname = "regen_max_retry", |
5551 | .data = &ipv6_devconf.regen_max_retry, | |
5552 | .maxlen = sizeof(int), | |
5553 | .mode = 0644, | |
5554 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5555 | }, |
5556 | { | |
e21e8467 SH |
5557 | .procname = "max_desync_factor", |
5558 | .data = &ipv6_devconf.max_desync_factor, | |
5559 | .maxlen = sizeof(int), | |
5560 | .mode = 0644, | |
5561 | .proc_handler = proc_dointvec, | |
1da177e4 | 5562 | }, |
1da177e4 | 5563 | { |
e21e8467 SH |
5564 | .procname = "max_addresses", |
5565 | .data = &ipv6_devconf.max_addresses, | |
5566 | .maxlen = sizeof(int), | |
5567 | .mode = 0644, | |
5568 | .proc_handler = proc_dointvec, | |
1da177e4 | 5569 | }, |
65f5c7c1 | 5570 | { |
e21e8467 SH |
5571 | .procname = "accept_ra_defrtr", |
5572 | .data = &ipv6_devconf.accept_ra_defrtr, | |
5573 | .maxlen = sizeof(int), | |
5574 | .mode = 0644, | |
5575 | .proc_handler = proc_dointvec, | |
65f5c7c1 | 5576 | }, |
8013d1d7 HL |
5577 | { |
5578 | .procname = "accept_ra_min_hop_limit", | |
5579 | .data = &ipv6_devconf.accept_ra_min_hop_limit, | |
5580 | .maxlen = sizeof(int), | |
5581 | .mode = 0644, | |
5582 | .proc_handler = proc_dointvec, | |
5583 | }, | |
c4fd30eb | 5584 | { |
e21e8467 SH |
5585 | .procname = "accept_ra_pinfo", |
5586 | .data = &ipv6_devconf.accept_ra_pinfo, | |
5587 | .maxlen = sizeof(int), | |
5588 | .mode = 0644, | |
5589 | .proc_handler = proc_dointvec, | |
c4fd30eb | 5590 | }, |
930d6ff2 YH |
5591 | #ifdef CONFIG_IPV6_ROUTER_PREF |
5592 | { | |
e21e8467 SH |
5593 | .procname = "accept_ra_rtr_pref", |
5594 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
5595 | .maxlen = sizeof(int), | |
5596 | .mode = 0644, | |
5597 | .proc_handler = proc_dointvec, | |
930d6ff2 | 5598 | }, |
52e16356 | 5599 | { |
e21e8467 SH |
5600 | .procname = "router_probe_interval", |
5601 | .data = &ipv6_devconf.rtr_probe_interval, | |
5602 | .maxlen = sizeof(int), | |
5603 | .mode = 0644, | |
5604 | .proc_handler = proc_dointvec_jiffies, | |
52e16356 | 5605 | }, |
fa03ef38 | 5606 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 | 5607 | { |
e21e8467 SH |
5608 | .procname = "accept_ra_rt_info_max_plen", |
5609 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
5610 | .maxlen = sizeof(int), | |
5611 | .mode = 0644, | |
5612 | .proc_handler = proc_dointvec, | |
09c884d4 YH |
5613 | }, |
5614 | #endif | |
930d6ff2 | 5615 | #endif |
fbea49e1 | 5616 | { |
e21e8467 SH |
5617 | .procname = "proxy_ndp", |
5618 | .data = &ipv6_devconf.proxy_ndp, | |
5619 | .maxlen = sizeof(int), | |
5620 | .mode = 0644, | |
c92d5491 | 5621 | .proc_handler = addrconf_sysctl_proxy_ndp, |
fbea49e1 | 5622 | }, |
0bcbc926 | 5623 | { |
e21e8467 SH |
5624 | .procname = "accept_source_route", |
5625 | .data = &ipv6_devconf.accept_source_route, | |
5626 | .maxlen = sizeof(int), | |
5627 | .mode = 0644, | |
5628 | .proc_handler = proc_dointvec, | |
0bcbc926 | 5629 | }, |
95c385b4 NH |
5630 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
5631 | { | |
e21e8467 SH |
5632 | .procname = "optimistic_dad", |
5633 | .data = &ipv6_devconf.optimistic_dad, | |
5634 | .maxlen = sizeof(int), | |
5635 | .mode = 0644, | |
5636 | .proc_handler = proc_dointvec, | |
95c385b4 NH |
5637 | |
5638 | }, | |
7fd2561e EK |
5639 | { |
5640 | .procname = "use_optimistic", | |
5641 | .data = &ipv6_devconf.use_optimistic, | |
5642 | .maxlen = sizeof(int), | |
5643 | .mode = 0644, | |
5644 | .proc_handler = proc_dointvec, | |
5645 | ||
5646 | }, | |
7bc570c8 YH |
5647 | #endif |
5648 | #ifdef CONFIG_IPV6_MROUTE | |
5649 | { | |
e21e8467 SH |
5650 | .procname = "mc_forwarding", |
5651 | .data = &ipv6_devconf.mc_forwarding, | |
5652 | .maxlen = sizeof(int), | |
5653 | .mode = 0444, | |
5654 | .proc_handler = proc_dointvec, | |
7bc570c8 | 5655 | }, |
95c385b4 | 5656 | #endif |
778d80be | 5657 | { |
e21e8467 SH |
5658 | .procname = "disable_ipv6", |
5659 | .data = &ipv6_devconf.disable_ipv6, | |
5660 | .maxlen = sizeof(int), | |
5661 | .mode = 0644, | |
5662 | .proc_handler = addrconf_sysctl_disable, | |
778d80be | 5663 | }, |
1b34be74 | 5664 | { |
e21e8467 SH |
5665 | .procname = "accept_dad", |
5666 | .data = &ipv6_devconf.accept_dad, | |
5667 | .maxlen = sizeof(int), | |
5668 | .mode = 0644, | |
5669 | .proc_handler = proc_dointvec, | |
1b34be74 | 5670 | }, |
f7734fdf | 5671 | { |
f7734fdf OP |
5672 | .procname = "force_tllao", |
5673 | .data = &ipv6_devconf.force_tllao, | |
5674 | .maxlen = sizeof(int), | |
5675 | .mode = 0644, | |
5676 | .proc_handler = proc_dointvec | |
5677 | }, | |
5cb04436 HFS |
5678 | { |
5679 | .procname = "ndisc_notify", | |
5680 | .data = &ipv6_devconf.ndisc_notify, | |
5681 | .maxlen = sizeof(int), | |
5682 | .mode = 0644, | |
5683 | .proc_handler = proc_dointvec | |
5684 | }, | |
b800c3b9 HFS |
5685 | { |
5686 | .procname = "suppress_frag_ndisc", | |
5687 | .data = &ipv6_devconf.suppress_frag_ndisc, | |
5688 | .maxlen = sizeof(int), | |
5689 | .mode = 0644, | |
5690 | .proc_handler = proc_dointvec | |
5691 | }, | |
d9333196 BG |
5692 | { |
5693 | .procname = "accept_ra_from_local", | |
5694 | .data = &ipv6_devconf.accept_ra_from_local, | |
5695 | .maxlen = sizeof(int), | |
5696 | .mode = 0644, | |
5697 | .proc_handler = proc_dointvec, | |
5698 | }, | |
c2943f14 HH |
5699 | { |
5700 | .procname = "accept_ra_mtu", | |
5701 | .data = &ipv6_devconf.accept_ra_mtu, | |
5702 | .maxlen = sizeof(int), | |
5703 | .mode = 0644, | |
5704 | .proc_handler = proc_dointvec, | |
5705 | }, | |
3d1bec99 HFS |
5706 | { |
5707 | .procname = "stable_secret", | |
5708 | .data = &ipv6_devconf.stable_secret, | |
5709 | .maxlen = IPV6_MAX_STRLEN, | |
5710 | .mode = 0600, | |
5711 | .proc_handler = addrconf_sysctl_stable_secret, | |
5712 | }, | |
3985e8a3 EK |
5713 | { |
5714 | .procname = "use_oif_addrs_only", | |
5715 | .data = &ipv6_devconf.use_oif_addrs_only, | |
5716 | .maxlen = sizeof(int), | |
5717 | .mode = 0644, | |
5718 | .proc_handler = proc_dointvec, | |
35103d11 AG |
5719 | }, |
5720 | { | |
5721 | .procname = "ignore_routes_with_linkdown", | |
5722 | .data = &ipv6_devconf.ignore_routes_with_linkdown, | |
5723 | .maxlen = sizeof(int), | |
5724 | .mode = 0644, | |
5725 | .proc_handler = addrconf_sysctl_ignore_routes_with_linkdown, | |
3985e8a3 | 5726 | }, |
1da177e4 | 5727 | { |
f8572d8f | 5728 | /* sentinel */ |
1da177e4 LT |
5729 | } |
5730 | }, | |
1da177e4 LT |
5731 | }; |
5732 | ||
bff16c2f | 5733 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
f8572d8f | 5734 | struct inet6_dev *idev, struct ipv6_devconf *p) |
1da177e4 LT |
5735 | { |
5736 | int i; | |
1da177e4 | 5737 | struct addrconf_sysctl_table *t; |
6105e293 | 5738 | char path[sizeof("net/ipv6/conf/") + IFNAMSIZ]; |
1dab6222 | 5739 | |
af879cc7 | 5740 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
63159f29 | 5741 | if (!t) |
f68635e6 PE |
5742 | goto out; |
5743 | ||
bcdd553f | 5744 | for (i = 0; t->addrconf_vars[i].data; i++) { |
e21e8467 | 5745 | t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf; |
1da177e4 | 5746 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
bff16c2f | 5747 | t->addrconf_vars[i].extra2 = net; |
1da177e4 | 5748 | } |
1da177e4 | 5749 | |
6105e293 | 5750 | snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name); |
1da177e4 | 5751 | |
6105e293 | 5752 | t->sysctl_header = register_net_sysctl(net, path, t->addrconf_vars); |
63159f29 | 5753 | if (!t->sysctl_header) |
6105e293 | 5754 | goto free; |
f68635e6 PE |
5755 | |
5756 | p->sysctl = t; | |
95897312 | 5757 | return 0; |
1da177e4 | 5758 | |
f68635e6 | 5759 | free: |
1da177e4 | 5760 | kfree(t); |
f68635e6 | 5761 | out: |
95897312 | 5762 | return -ENOBUFS; |
1da177e4 LT |
5763 | } |
5764 | ||
408c4768 PE |
5765 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
5766 | { | |
5767 | struct addrconf_sysctl_table *t; | |
5768 | ||
63159f29 | 5769 | if (!p->sysctl) |
408c4768 PE |
5770 | return; |
5771 | ||
5772 | t = p->sysctl; | |
5773 | p->sysctl = NULL; | |
ff538818 | 5774 | unregister_net_sysctl_table(t->sysctl_header); |
408c4768 PE |
5775 | kfree(t); |
5776 | } | |
5777 | ||
a317a2f1 | 5778 | static int addrconf_sysctl_register(struct inet6_dev *idev) |
f52295a9 | 5779 | { |
a317a2f1 WC |
5780 | int err; |
5781 | ||
5782 | if (!sysctl_dev_name_is_allowed(idev->dev->name)) | |
5783 | return -EINVAL; | |
5784 | ||
5785 | err = neigh_sysctl_register(idev->dev, idev->nd_parms, | |
5786 | &ndisc_ifinfo_sysctl_change); | |
5787 | if (err) | |
5788 | return err; | |
5789 | err = __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, | |
5790 | idev, &idev->cnf); | |
5791 | if (err) | |
5792 | neigh_sysctl_unregister(idev->nd_parms); | |
5793 | ||
5794 | return err; | |
f52295a9 PE |
5795 | } |
5796 | ||
408c4768 | 5797 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4 | 5798 | { |
408c4768 PE |
5799 | __addrconf_sysctl_unregister(&idev->cnf); |
5800 | neigh_sysctl_unregister(idev->nd_parms); | |
1da177e4 LT |
5801 | } |
5802 | ||
5803 | ||
5804 | #endif | |
5805 | ||
2c8c1e72 | 5806 | static int __net_init addrconf_init_net(struct net *net) |
e0da5a48 | 5807 | { |
a79ca223 | 5808 | int err = -ENOMEM; |
e0da5a48 PE |
5809 | struct ipv6_devconf *all, *dflt; |
5810 | ||
a79ca223 | 5811 | all = kmemdup(&ipv6_devconf, sizeof(ipv6_devconf), GFP_KERNEL); |
63159f29 | 5812 | if (!all) |
a79ca223 | 5813 | goto err_alloc_all; |
e0da5a48 | 5814 | |
a79ca223 | 5815 | dflt = kmemdup(&ipv6_devconf_dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); |
63159f29 | 5816 | if (!dflt) |
a79ca223 | 5817 | goto err_alloc_dflt; |
e0da5a48 | 5818 | |
a79ca223 HZ |
5819 | /* these will be inherited by all namespaces */ |
5820 | dflt->autoconf = ipv6_defaults.autoconf; | |
5821 | dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; | |
e0da5a48 | 5822 | |
3d1bec99 HFS |
5823 | dflt->stable_secret.initialized = false; |
5824 | all->stable_secret.initialized = false; | |
5825 | ||
e0da5a48 PE |
5826 | net->ipv6.devconf_all = all; |
5827 | net->ipv6.devconf_dflt = dflt; | |
5828 | ||
5829 | #ifdef CONFIG_SYSCTL | |
f8572d8f | 5830 | err = __addrconf_sysctl_register(net, "all", NULL, all); |
e0da5a48 PE |
5831 | if (err < 0) |
5832 | goto err_reg_all; | |
5833 | ||
f8572d8f | 5834 | err = __addrconf_sysctl_register(net, "default", NULL, dflt); |
e0da5a48 PE |
5835 | if (err < 0) |
5836 | goto err_reg_dflt; | |
5837 | #endif | |
5838 | return 0; | |
5839 | ||
5840 | #ifdef CONFIG_SYSCTL | |
5841 | err_reg_dflt: | |
5842 | __addrconf_sysctl_unregister(all); | |
5843 | err_reg_all: | |
5844 | kfree(dflt); | |
5845 | #endif | |
5846 | err_alloc_dflt: | |
5847 | kfree(all); | |
5848 | err_alloc_all: | |
5849 | return err; | |
5850 | } | |
5851 | ||
2c8c1e72 | 5852 | static void __net_exit addrconf_exit_net(struct net *net) |
e0da5a48 PE |
5853 | { |
5854 | #ifdef CONFIG_SYSCTL | |
5855 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); | |
5856 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); | |
5857 | #endif | |
73cf0e92 | 5858 | kfree(net->ipv6.devconf_dflt); |
5859 | kfree(net->ipv6.devconf_all); | |
e0da5a48 PE |
5860 | } |
5861 | ||
5862 | static struct pernet_operations addrconf_ops = { | |
5863 | .init = addrconf_init_net, | |
5864 | .exit = addrconf_exit_net, | |
5865 | }; | |
5866 | ||
207895fd | 5867 | static struct rtnl_af_ops inet6_ops __read_mostly = { |
b382b191 TG |
5868 | .family = AF_INET6, |
5869 | .fill_link_af = inet6_fill_link_af, | |
5870 | .get_link_af_size = inet6_get_link_af_size, | |
11b1f828 | 5871 | .validate_link_af = inet6_validate_link_af, |
f53adae4 | 5872 | .set_link_af = inet6_set_link_af, |
b382b191 TG |
5873 | }; |
5874 | ||
1da177e4 LT |
5875 | /* |
5876 | * Init / cleanup code | |
5877 | */ | |
5878 | ||
5879 | int __init addrconf_init(void) | |
5880 | { | |
a317a2f1 | 5881 | struct inet6_dev *idev; |
c2e21293 | 5882 | int i, err; |
2a8cc6c8 | 5883 | |
e21e8467 SH |
5884 | err = ipv6_addr_label_init(); |
5885 | if (err < 0) { | |
f3213831 JP |
5886 | pr_crit("%s: cannot initialize default policy table: %d\n", |
5887 | __func__, err); | |
2cc6d2bf | 5888 | goto out; |
2a8cc6c8 | 5889 | } |
1da177e4 | 5890 | |
2cc6d2bf NH |
5891 | err = register_pernet_subsys(&addrconf_ops); |
5892 | if (err < 0) | |
5893 | goto out_addrlabel; | |
e0da5a48 | 5894 | |
c15b1cca HFS |
5895 | addrconf_wq = create_workqueue("ipv6_addrconf"); |
5896 | if (!addrconf_wq) { | |
5897 | err = -ENOMEM; | |
5898 | goto out_nowq; | |
5899 | } | |
5900 | ||
1da177e4 LT |
5901 | /* The addrconf netdev notifier requires that loopback_dev |
5902 | * has it's ipv6 private information allocated and setup | |
5903 | * before it can bring up and give link-local addresses | |
5904 | * to other devices which are up. | |
5905 | * | |
5906 | * Unfortunately, loopback_dev is not necessarily the first | |
5907 | * entry in the global dev_base list of net devices. In fact, | |
5908 | * it is likely to be the very last entry on that list. | |
5909 | * So this causes the notifier registry below to try and | |
5910 | * give link-local addresses to all devices besides loopback_dev | |
5911 | * first, then loopback_dev, which cases all the non-loopback_dev | |
5912 | * devices to fail to get a link-local address. | |
5913 | * | |
5914 | * So, as a temporary fix, allocate the ipv6 structure for | |
5915 | * loopback_dev first by hand. | |
5916 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
5917 | * device and it being up should be removed. | |
5918 | */ | |
5919 | rtnl_lock(); | |
a317a2f1 | 5920 | idev = ipv6_add_dev(init_net.loopback_dev); |
1da177e4 | 5921 | rtnl_unlock(); |
a317a2f1 WC |
5922 | if (IS_ERR(idev)) { |
5923 | err = PTR_ERR(idev); | |
e0da5a48 | 5924 | goto errlo; |
a317a2f1 | 5925 | } |
1da177e4 | 5926 | |
c2e21293 | 5927 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
5928 | INIT_HLIST_HEAD(&inet6_addr_lst[i]); | |
5929 | ||
1da177e4 LT |
5930 | register_netdevice_notifier(&ipv6_dev_notf); |
5931 | ||
c15b1cca | 5932 | addrconf_verify(); |
c127ea2c | 5933 | |
3678a9d8 | 5934 | rtnl_af_register(&inet6_ops); |
b382b191 | 5935 | |
c7ac8679 GR |
5936 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo, |
5937 | NULL); | |
c127ea2c TG |
5938 | if (err < 0) |
5939 | goto errout; | |
5940 | ||
5941 | /* Only the first call to __rtnl_register can fail */ | |
c7ac8679 GR |
5942 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL); |
5943 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL); | |
5944 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, | |
5945 | inet6_dump_ifaddr, NULL); | |
5946 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, | |
5947 | inet6_dump_ifmcaddr, NULL); | |
5948 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, | |
5949 | inet6_dump_ifacaddr, NULL); | |
76f8f6cb | 5950 | __rtnl_register(PF_INET6, RTM_GETNETCONF, inet6_netconf_get_devconf, |
7a674200 | 5951 | inet6_netconf_dump_devconf, NULL); |
c127ea2c | 5952 | |
2a8cc6c8 YH |
5953 | ipv6_addr_label_rtnl_register(); |
5954 | ||
1da177e4 | 5955 | return 0; |
c127ea2c | 5956 | errout: |
b382b191 | 5957 | rtnl_af_unregister(&inet6_ops); |
c127ea2c | 5958 | unregister_netdevice_notifier(&ipv6_dev_notf); |
e0da5a48 | 5959 | errlo: |
c15b1cca HFS |
5960 | destroy_workqueue(addrconf_wq); |
5961 | out_nowq: | |
e0da5a48 | 5962 | unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf NH |
5963 | out_addrlabel: |
5964 | ipv6_addr_label_cleanup(); | |
5965 | out: | |
c127ea2c | 5966 | return err; |
1da177e4 LT |
5967 | } |
5968 | ||
09f7709f | 5969 | void addrconf_cleanup(void) |
1da177e4 | 5970 | { |
176c39af | 5971 | struct net_device *dev; |
1da177e4 LT |
5972 | int i; |
5973 | ||
5974 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 | 5975 | unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf | 5976 | ipv6_addr_label_cleanup(); |
1da177e4 LT |
5977 | |
5978 | rtnl_lock(); | |
5979 | ||
b382b191 TG |
5980 | __rtnl_af_unregister(&inet6_ops); |
5981 | ||
176c39af DL |
5982 | /* clean dev list */ |
5983 | for_each_netdev(&init_net, dev) { | |
5984 | if (__in6_dev_get(dev) == NULL) | |
5985 | continue; | |
5986 | addrconf_ifdown(dev, 1); | |
5987 | } | |
5988 | addrconf_ifdown(init_net.loopback_dev, 2); | |
5989 | ||
1da177e4 LT |
5990 | /* |
5991 | * Check hash table. | |
5992 | */ | |
5c578aed | 5993 | spin_lock_bh(&addrconf_hash_lock); |
c2e21293 | 5994 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
5995 | WARN_ON(!hlist_empty(&inet6_addr_lst[i])); | |
5c578aed | 5996 | spin_unlock_bh(&addrconf_hash_lock); |
c15b1cca | 5997 | cancel_delayed_work(&addr_chk_work); |
1da177e4 | 5998 | rtnl_unlock(); |
c15b1cca HFS |
5999 | |
6000 | destroy_workqueue(addrconf_wq); | |
1da177e4 | 6001 | } |