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> |
174cd4b1 | 46 | #include <linux/sched/signal.h> |
1da177e4 LT |
47 | #include <linux/socket.h> |
48 | #include <linux/sockios.h> | |
1da177e4 | 49 | #include <linux/net.h> |
3d1bec99 | 50 | #include <linux/inet.h> |
1da177e4 LT |
51 | #include <linux/in6.h> |
52 | #include <linux/netdevice.h> | |
1823730f | 53 | #include <linux/if_addr.h> |
1da177e4 LT |
54 | #include <linux/if_arp.h> |
55 | #include <linux/if_arcnet.h> | |
56 | #include <linux/if_infiniband.h> | |
57 | #include <linux/route.h> | |
58 | #include <linux/inetdevice.h> | |
59 | #include <linux/init.h> | |
5a0e3ad6 | 60 | #include <linux/slab.h> |
1da177e4 LT |
61 | #ifdef CONFIG_SYSCTL |
62 | #include <linux/sysctl.h> | |
63 | #endif | |
4fc268d2 | 64 | #include <linux/capability.h> |
1da177e4 LT |
65 | #include <linux/delay.h> |
66 | #include <linux/notifier.h> | |
543537bd | 67 | #include <linux/string.h> |
ddbe5032 | 68 | #include <linux/hash.h> |
1da177e4 | 69 | |
457c4cbc | 70 | #include <net/net_namespace.h> |
1da177e4 LT |
71 | #include <net/sock.h> |
72 | #include <net/snmp.h> | |
73 | ||
5241c2d7 | 74 | #include <net/6lowpan.h> |
cb6bf355 | 75 | #include <net/firewire.h> |
1da177e4 LT |
76 | #include <net/ipv6.h> |
77 | #include <net/protocol.h> | |
78 | #include <net/ndisc.h> | |
79 | #include <net/ip6_route.h> | |
80 | #include <net/addrconf.h> | |
81 | #include <net/tcp.h> | |
82 | #include <net/ip.h> | |
5d620266 | 83 | #include <net/netlink.h> |
f24e3d65 | 84 | #include <net/pkt_sched.h> |
ca254490 | 85 | #include <net/l3mdev.h> |
1da177e4 LT |
86 | #include <linux/if_tunnel.h> |
87 | #include <linux/rtnetlink.h> | |
f3a1bfb1 | 88 | #include <linux/netconf.h> |
1da177e4 | 89 | #include <linux/random.h> |
e21e8467 | 90 | #include <linux/uaccess.h> |
7f7d9a6b | 91 | #include <asm/unaligned.h> |
1da177e4 LT |
92 | |
93 | #include <linux/proc_fs.h> | |
94 | #include <linux/seq_file.h> | |
bc3b2d7f | 95 | #include <linux/export.h> |
1da177e4 LT |
96 | |
97 | /* Set to 3 to get tracing... */ | |
98 | #define ACONF_DEBUG 2 | |
99 | ||
100 | #if ACONF_DEBUG >= 3 | |
ba3542e1 | 101 | #define ADBG(fmt, ...) printk(fmt, ##__VA_ARGS__) |
1da177e4 | 102 | #else |
ba3542e1 | 103 | #define ADBG(fmt, ...) do { if (0) printk(fmt, ##__VA_ARGS__); } while (0) |
1da177e4 LT |
104 | #endif |
105 | ||
106 | #define INFINITY_LIFE_TIME 0xFFFFFFFF | |
18a31e1e | 107 | |
3d1bec99 HFS |
108 | #define IPV6_MAX_STRLEN \ |
109 | sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255") | |
110 | ||
18a31e1e TG |
111 | static inline u32 cstamp_delta(unsigned long cstamp) |
112 | { | |
113 | return (cstamp - INITIAL_JIFFIES) * 100UL / HZ; | |
114 | } | |
1da177e4 | 115 | |
bd11f074 MŻ |
116 | static inline s32 rfc3315_s14_backoff_init(s32 irt) |
117 | { | |
118 | /* multiply 'initial retransmission time' by 0.9 .. 1.1 */ | |
119 | u64 tmp = (900000 + prandom_u32() % 200001) * (u64)irt; | |
120 | do_div(tmp, 1000000); | |
121 | return (s32)tmp; | |
122 | } | |
123 | ||
124 | static inline s32 rfc3315_s14_backoff_update(s32 rt, s32 mrt) | |
125 | { | |
126 | /* multiply 'retransmission timeout' by 1.9 .. 2.1 */ | |
127 | u64 tmp = (1900000 + prandom_u32() % 200001) * (u64)rt; | |
128 | do_div(tmp, 1000000); | |
129 | if ((s32)tmp > mrt) { | |
130 | /* multiply 'maximum retransmission time' by 0.9 .. 1.1 */ | |
131 | tmp = (900000 + prandom_u32() % 200001) * (u64)mrt; | |
132 | do_div(tmp, 1000000); | |
133 | } | |
134 | return (s32)tmp; | |
135 | } | |
136 | ||
1da177e4 | 137 | #ifdef CONFIG_SYSCTL |
a317a2f1 | 138 | static int addrconf_sysctl_register(struct inet6_dev *idev); |
408c4768 PE |
139 | static void addrconf_sysctl_unregister(struct inet6_dev *idev); |
140 | #else | |
a317a2f1 | 141 | static inline int addrconf_sysctl_register(struct inet6_dev *idev) |
408c4768 | 142 | { |
a317a2f1 | 143 | return 0; |
408c4768 PE |
144 | } |
145 | ||
146 | static inline void addrconf_sysctl_unregister(struct inet6_dev *idev) | |
147 | { | |
148 | } | |
1da177e4 LT |
149 | #endif |
150 | ||
9d6280da JB |
151 | static void ipv6_regen_rndid(struct inet6_dev *idev); |
152 | static void ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); | |
1da177e4 | 153 | |
1b34be74 | 154 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev); |
1da177e4 | 155 | static int ipv6_count_addresses(struct inet6_dev *idev); |
622c81d5 HFS |
156 | static int ipv6_generate_stable_address(struct in6_addr *addr, |
157 | u8 dad_count, | |
158 | const struct inet6_dev *idev); | |
1da177e4 LT |
159 | |
160 | /* | |
161 | * Configured unicast address hash table | |
162 | */ | |
c2e21293 | 163 | static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE]; |
5c578aed | 164 | static DEFINE_SPINLOCK(addrconf_hash_lock); |
1da177e4 | 165 | |
c15b1cca HFS |
166 | static void addrconf_verify(void); |
167 | static void addrconf_verify_rtnl(void); | |
168 | static void addrconf_verify_work(struct work_struct *); | |
1da177e4 | 169 | |
c15b1cca HFS |
170 | static struct workqueue_struct *addrconf_wq; |
171 | static DECLARE_DELAYED_WORK(addr_chk_work, addrconf_verify_work); | |
1da177e4 LT |
172 | |
173 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
174 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
175 | ||
93d9b7d7 JP |
176 | static void addrconf_type_change(struct net_device *dev, |
177 | unsigned long event); | |
1da177e4 LT |
178 | static int addrconf_ifdown(struct net_device *dev, int how); |
179 | ||
21caa662 RK |
180 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, |
181 | int plen, | |
182 | const struct net_device *dev, | |
183 | u32 flags, u32 noflags); | |
184 | ||
cf22f9a2 | 185 | static void addrconf_dad_start(struct inet6_ifaddr *ifp); |
c15b1cca | 186 | static void addrconf_dad_work(struct work_struct *w); |
07ca93e3 DA |
187 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp, bool bump_id, |
188 | bool send_na); | |
c5e33bdd | 189 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
190 | static void addrconf_rs_timer(unsigned long data); |
191 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
192 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
193 | ||
1ab1457c | 194 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 | 195 | struct prefix_info *pinfo); |
3e81c6da DM |
196 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
197 | struct net_device *dev); | |
1da177e4 | 198 | |
888c848e | 199 | static struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
200 | .forwarding = 0, |
201 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
202 | .mtu6 = IPV6_MIN_MTU, | |
203 | .accept_ra = 1, | |
204 | .accept_redirects = 1, | |
205 | .autoconf = 1, | |
206 | .force_mld_version = 0, | |
fc4eba58 HFS |
207 | .mldv1_unsolicited_report_interval = 10 * HZ, |
208 | .mldv2_unsolicited_report_interval = HZ, | |
1da177e4 LT |
209 | .dad_transmits = 1, |
210 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
211 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
bd11f074 | 212 | .rtr_solicit_max_interval = RTR_SOLICITATION_MAX_INTERVAL, |
1da177e4 | 213 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, |
67ba4152 | 214 | .use_tempaddr = 0, |
1da177e4 LT |
215 | .temp_valid_lft = TEMP_VALID_LIFETIME, |
216 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
217 | .regen_max_retry = REGEN_MAX_RETRY, | |
218 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
1da177e4 | 219 | .max_addresses = IPV6_MAX_ADDRESSES, |
65f5c7c1 | 220 | .accept_ra_defrtr = 1, |
d9333196 | 221 | .accept_ra_from_local = 0, |
8013d1d7 | 222 | .accept_ra_min_hop_limit= 1, |
c4fd30eb | 223 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
224 | #ifdef CONFIG_IPV6_ROUTER_PREF |
225 | .accept_ra_rtr_pref = 1, | |
52e16356 | 226 | .rtr_probe_interval = 60 * HZ, |
09c884d4 | 227 | #ifdef CONFIG_IPV6_ROUTE_INFO |
bbea124b | 228 | .accept_ra_rt_info_min_plen = 0, |
09c884d4 YH |
229 | .accept_ra_rt_info_max_plen = 0, |
230 | #endif | |
930d6ff2 | 231 | #endif |
fbea49e1 | 232 | .proxy_ndp = 0, |
0bcbc926 | 233 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 234 | .disable_ipv6 = 0, |
f2272d5d | 235 | .accept_dad = 0, |
b800c3b9 | 236 | .suppress_frag_ndisc = 1, |
c2943f14 | 237 | .accept_ra_mtu = 1, |
3d1bec99 HFS |
238 | .stable_secret = { |
239 | .initialized = false, | |
3985e8a3 EK |
240 | }, |
241 | .use_oif_addrs_only = 0, | |
35103d11 | 242 | .ignore_routes_with_linkdown = 0, |
f1705ec1 | 243 | .keep_addr_on_down = 0, |
1ababeba | 244 | .seg6_enabled = 0, |
bf355b8d DL |
245 | #ifdef CONFIG_IPV6_SEG6_HMAC |
246 | .seg6_require_hmac = 0, | |
247 | #endif | |
adc176c5 | 248 | .enhanced_dad = 1, |
d35a00b8 | 249 | .addr_gen_mode = IN6_ADDR_GEN_MODE_EUI64, |
df789fe7 | 250 | .disable_policy = 0, |
1da177e4 LT |
251 | }; |
252 | ||
ab32ea5d | 253 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
254 | .forwarding = 0, |
255 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
256 | .mtu6 = IPV6_MIN_MTU, | |
257 | .accept_ra = 1, | |
258 | .accept_redirects = 1, | |
259 | .autoconf = 1, | |
fc4eba58 HFS |
260 | .force_mld_version = 0, |
261 | .mldv1_unsolicited_report_interval = 10 * HZ, | |
262 | .mldv2_unsolicited_report_interval = HZ, | |
1da177e4 LT |
263 | .dad_transmits = 1, |
264 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
265 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
bd11f074 | 266 | .rtr_solicit_max_interval = RTR_SOLICITATION_MAX_INTERVAL, |
1da177e4 | 267 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, |
1da177e4 LT |
268 | .use_tempaddr = 0, |
269 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
270 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
271 | .regen_max_retry = REGEN_MAX_RETRY, | |
272 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
1da177e4 | 273 | .max_addresses = IPV6_MAX_ADDRESSES, |
65f5c7c1 | 274 | .accept_ra_defrtr = 1, |
d9333196 | 275 | .accept_ra_from_local = 0, |
8013d1d7 | 276 | .accept_ra_min_hop_limit= 1, |
c4fd30eb | 277 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
278 | #ifdef CONFIG_IPV6_ROUTER_PREF |
279 | .accept_ra_rtr_pref = 1, | |
52e16356 | 280 | .rtr_probe_interval = 60 * HZ, |
09c884d4 | 281 | #ifdef CONFIG_IPV6_ROUTE_INFO |
bbea124b | 282 | .accept_ra_rt_info_min_plen = 0, |
09c884d4 YH |
283 | .accept_ra_rt_info_max_plen = 0, |
284 | #endif | |
930d6ff2 | 285 | #endif |
fbea49e1 | 286 | .proxy_ndp = 0, |
0bcbc926 | 287 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 288 | .disable_ipv6 = 0, |
1b34be74 | 289 | .accept_dad = 1, |
b800c3b9 | 290 | .suppress_frag_ndisc = 1, |
c2943f14 | 291 | .accept_ra_mtu = 1, |
3d1bec99 HFS |
292 | .stable_secret = { |
293 | .initialized = false, | |
294 | }, | |
3985e8a3 | 295 | .use_oif_addrs_only = 0, |
35103d11 | 296 | .ignore_routes_with_linkdown = 0, |
f1705ec1 | 297 | .keep_addr_on_down = 0, |
1ababeba | 298 | .seg6_enabled = 0, |
bf355b8d DL |
299 | #ifdef CONFIG_IPV6_SEG6_HMAC |
300 | .seg6_require_hmac = 0, | |
301 | #endif | |
adc176c5 | 302 | .enhanced_dad = 1, |
d35a00b8 | 303 | .addr_gen_mode = IN6_ADDR_GEN_MODE_EUI64, |
df789fe7 | 304 | .disable_policy = 0, |
1da177e4 LT |
305 | }; |
306 | ||
0006d8c7 MM |
307 | /* Check if link is ready: is it up and is a valid qdisc available */ |
308 | static inline bool addrconf_link_ready(const struct net_device *dev) | |
f24e3d65 | 309 | { |
0006d8c7 | 310 | return netif_oper_up(dev) && !qdisc_tx_is_noop(dev); |
f24e3d65 MC |
311 | } |
312 | ||
b7b1bfce | 313 | static void addrconf_del_rs_timer(struct inet6_dev *idev) |
1da177e4 | 314 | { |
b7b1bfce HFS |
315 | if (del_timer(&idev->rs_timer)) |
316 | __in6_dev_put(idev); | |
317 | } | |
318 | ||
c15b1cca | 319 | static void addrconf_del_dad_work(struct inet6_ifaddr *ifp) |
b7b1bfce | 320 | { |
c15b1cca | 321 | if (cancel_delayed_work(&ifp->dad_work)) |
1da177e4 LT |
322 | __in6_ifa_put(ifp); |
323 | } | |
324 | ||
b7b1bfce HFS |
325 | static void addrconf_mod_rs_timer(struct inet6_dev *idev, |
326 | unsigned long when) | |
327 | { | |
328 | if (!timer_pending(&idev->rs_timer)) | |
329 | in6_dev_hold(idev); | |
330 | mod_timer(&idev->rs_timer, jiffies + when); | |
331 | } | |
1da177e4 | 332 | |
c15b1cca HFS |
333 | static void addrconf_mod_dad_work(struct inet6_ifaddr *ifp, |
334 | unsigned long delay) | |
1da177e4 | 335 | { |
f8a894b2 XL |
336 | in6_ifa_hold(ifp); |
337 | if (mod_delayed_work(addrconf_wq, &ifp->dad_work, delay)) | |
338 | in6_ifa_put(ifp); | |
1da177e4 LT |
339 | } |
340 | ||
7f7d9a6b HX |
341 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
342 | { | |
827da44c JS |
343 | int i; |
344 | ||
698365fa WC |
345 | idev->stats.ipv6 = alloc_percpu(struct ipstats_mib); |
346 | if (!idev->stats.ipv6) | |
7f7d9a6b | 347 | goto err_ip; |
827da44c JS |
348 | |
349 | for_each_possible_cpu(i) { | |
350 | struct ipstats_mib *addrconf_stats; | |
698365fa | 351 | addrconf_stats = per_cpu_ptr(idev->stats.ipv6, i); |
827da44c | 352 | u64_stats_init(&addrconf_stats->syncp); |
827da44c JS |
353 | } |
354 | ||
355 | ||
be281e55 ED |
356 | idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device), |
357 | GFP_KERNEL); | |
358 | if (!idev->stats.icmpv6dev) | |
7f7d9a6b | 359 | goto err_icmp; |
be281e55 ED |
360 | idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device), |
361 | GFP_KERNEL); | |
362 | if (!idev->stats.icmpv6msgdev) | |
14878f75 | 363 | goto err_icmpmsg; |
7f7d9a6b HX |
364 | |
365 | return 0; | |
366 | ||
14878f75 | 367 | err_icmpmsg: |
be281e55 | 368 | kfree(idev->stats.icmpv6dev); |
7f7d9a6b | 369 | err_icmp: |
698365fa | 370 | free_percpu(idev->stats.ipv6); |
7f7d9a6b | 371 | err_ip: |
aaf70ec7 | 372 | return -ENOMEM; |
7f7d9a6b HX |
373 | } |
374 | ||
8e5e8f30 | 375 | static struct inet6_dev *ipv6_add_dev(struct net_device *dev) |
1da177e4 LT |
376 | { |
377 | struct inet6_dev *ndev; | |
a317a2f1 | 378 | int err = -ENOMEM; |
1da177e4 LT |
379 | |
380 | ASSERT_RTNL(); | |
381 | ||
382 | if (dev->mtu < IPV6_MIN_MTU) | |
a317a2f1 | 383 | return ERR_PTR(-EINVAL); |
1da177e4 | 384 | |
1ab1457c | 385 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
63159f29 | 386 | if (!ndev) |
a317a2f1 | 387 | return ERR_PTR(err); |
322f74a4 IO |
388 | |
389 | rwlock_init(&ndev->lock); | |
390 | ndev->dev = dev; | |
502a2ffd | 391 | INIT_LIST_HEAD(&ndev->addr_list); |
b7b1bfce HFS |
392 | setup_timer(&ndev->rs_timer, addrconf_rs_timer, |
393 | (unsigned long)ndev); | |
c346dca1 | 394 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
9b29c696 HFS |
395 | |
396 | if (ndev->cnf.stable_secret.initialized) | |
d35a00b8 | 397 | ndev->cnf.addr_gen_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY; |
9b29c696 | 398 | else |
d35a00b8 | 399 | ndev->cnf.addr_gen_mode = ipv6_devconf_dflt.addr_gen_mode; |
9b29c696 | 400 | |
322f74a4 | 401 | ndev->cnf.mtu6 = dev->mtu; |
322f74a4 | 402 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); |
63159f29 | 403 | if (!ndev->nd_parms) { |
322f74a4 | 404 | kfree(ndev); |
a317a2f1 | 405 | return ERR_PTR(err); |
322f74a4 | 406 | } |
0187bdfb BH |
407 | if (ndev->cnf.forwarding) |
408 | dev_disable_lro(dev); | |
322f74a4 IO |
409 | /* We refer to the device */ |
410 | dev_hold(dev); | |
1da177e4 | 411 | |
322f74a4 | 412 | if (snmp6_alloc_dev(ndev) < 0) { |
ba3542e1 | 413 | ADBG(KERN_WARNING |
f3213831 | 414 | "%s: cannot allocate memory for statistics; dev=%s.\n", |
ba3542e1 | 415 | __func__, dev->name); |
322f74a4 | 416 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
8603e33d RL |
417 | dev_put(dev); |
418 | kfree(ndev); | |
a317a2f1 | 419 | return ERR_PTR(err); |
322f74a4 | 420 | } |
1da177e4 | 421 | |
322f74a4 | 422 | if (snmp6_register_dev(ndev) < 0) { |
ba3542e1 | 423 | ADBG(KERN_WARNING |
f3213831 | 424 | "%s: cannot create /proc/net/dev_snmp6/%s\n", |
ba3542e1 | 425 | __func__, dev->name); |
a317a2f1 | 426 | goto err_release; |
322f74a4 IO |
427 | } |
428 | ||
9d6280da | 429 | /* One reference from device. */ |
1be92460 | 430 | refcount_set(&ndev->refcnt, 1); |
1da177e4 | 431 | |
1b34be74 YH |
432 | if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) |
433 | ndev->cnf.accept_dad = -1; | |
434 | ||
07a93626 | 435 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
b077d7ab | 436 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { |
f3213831 | 437 | pr_info("%s: Disabled Multicast RS\n", dev->name); |
b077d7ab YH |
438 | ndev->cnf.rtr_solicits = 0; |
439 | } | |
440 | #endif | |
441 | ||
372e6c8f | 442 | INIT_LIST_HEAD(&ndev->tempaddr_list); |
76506a98 | 443 | ndev->desync_factor = U32_MAX; |
322f74a4 IO |
444 | if ((dev->flags&IFF_LOOPBACK) || |
445 | dev->type == ARPHRD_TUNNEL || | |
9625ed72 | 446 | dev->type == ARPHRD_TUNNEL6 || |
0be669bb | 447 | dev->type == ARPHRD_SIT || |
0be669bb | 448 | dev->type == ARPHRD_NONE) { |
322f74a4 | 449 | ndev->cnf.use_tempaddr = -1; |
9d6280da JB |
450 | } else |
451 | ipv6_regen_rndid(ndev); | |
5d9efa7e | 452 | |
914faa14 | 453 | ndev->token = in6addr_any; |
1da177e4 | 454 | |
0006d8c7 | 455 | if (netif_running(dev) && addrconf_link_ready(dev)) |
53aadcc9 HX |
456 | ndev->if_flags |= IF_READY; |
457 | ||
322f74a4 IO |
458 | ipv6_mc_init_dev(ndev); |
459 | ndev->tstamp = jiffies; | |
a317a2f1 WC |
460 | err = addrconf_sysctl_register(ndev); |
461 | if (err) { | |
462 | ipv6_mc_destroy_dev(ndev); | |
2a189f9e | 463 | snmp6_unregister_dev(ndev); |
a317a2f1 WC |
464 | goto err_release; |
465 | } | |
30c4cf57 | 466 | /* protected by rtnl_lock */ |
cf778b00 | 467 | rcu_assign_pointer(dev->ip6_ptr, ndev); |
d88ae4cc | 468 | |
2c5e8933 HFS |
469 | /* Join interface-local all-node multicast group */ |
470 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allnodes); | |
471 | ||
d88ae4cc | 472 | /* Join all-node multicast group */ |
f3ee4010 | 473 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
d88ae4cc | 474 | |
d6ddef9e | 475 | /* Join all-router multicast group if forwarding is set */ |
8b2aaede | 476 | if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST)) |
d6ddef9e LW |
477 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
478 | ||
1da177e4 | 479 | return ndev; |
a317a2f1 WC |
480 | |
481 | err_release: | |
482 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
483 | ndev->dead = 1; | |
484 | in6_dev_finish_destroy(ndev); | |
485 | return ERR_PTR(err); | |
1da177e4 LT |
486 | } |
487 | ||
8e5e8f30 | 488 | static struct inet6_dev *ipv6_find_idev(struct net_device *dev) |
1da177e4 LT |
489 | { |
490 | struct inet6_dev *idev; | |
491 | ||
492 | ASSERT_RTNL(); | |
493 | ||
e21e8467 SH |
494 | idev = __in6_dev_get(dev); |
495 | if (!idev) { | |
496 | idev = ipv6_add_dev(dev); | |
a317a2f1 | 497 | if (IS_ERR(idev)) |
1da177e4 LT |
498 | return NULL; |
499 | } | |
c5e33bdd | 500 | |
1da177e4 LT |
501 | if (dev->flags&IFF_UP) |
502 | ipv6_mc_up(idev); | |
503 | return idev; | |
504 | } | |
505 | ||
f3a1bfb1 ND |
506 | static int inet6_netconf_msgsize_devconf(int type) |
507 | { | |
508 | int size = NLMSG_ALIGN(sizeof(struct netconfmsg)) | |
509 | + nla_total_size(4); /* NETCONFA_IFINDEX */ | |
136ba622 | 510 | bool all = false; |
f3a1bfb1 | 511 | |
136ba622 ZS |
512 | if (type == NETCONFA_ALL) |
513 | all = true; | |
514 | ||
515 | if (all || type == NETCONFA_FORWARDING) | |
f3a1bfb1 | 516 | size += nla_total_size(4); |
b1afce95 | 517 | #ifdef CONFIG_IPV6_MROUTE |
136ba622 | 518 | if (all || type == NETCONFA_MC_FORWARDING) |
d67b8c61 | 519 | size += nla_total_size(4); |
b1afce95 | 520 | #endif |
136ba622 | 521 | if (all || type == NETCONFA_PROXY_NEIGH) |
c92d5491 | 522 | size += nla_total_size(4); |
f3a1bfb1 | 523 | |
136ba622 | 524 | if (all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) |
35103d11 AG |
525 | size += nla_total_size(4); |
526 | ||
f3a1bfb1 ND |
527 | return size; |
528 | } | |
529 | ||
530 | static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex, | |
531 | struct ipv6_devconf *devconf, u32 portid, | |
532 | u32 seq, int event, unsigned int flags, | |
533 | int type) | |
534 | { | |
535 | struct nlmsghdr *nlh; | |
536 | struct netconfmsg *ncm; | |
136ba622 | 537 | bool all = false; |
f3a1bfb1 ND |
538 | |
539 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg), | |
540 | flags); | |
63159f29 | 541 | if (!nlh) |
f3a1bfb1 ND |
542 | return -EMSGSIZE; |
543 | ||
136ba622 ZS |
544 | if (type == NETCONFA_ALL) |
545 | all = true; | |
546 | ||
f3a1bfb1 ND |
547 | ncm = nlmsg_data(nlh); |
548 | ncm->ncm_family = AF_INET6; | |
549 | ||
550 | if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0) | |
551 | goto nla_put_failure; | |
552 | ||
23452170 DA |
553 | if (!devconf) |
554 | goto out; | |
555 | ||
136ba622 | 556 | if ((all || type == NETCONFA_FORWARDING) && |
f3a1bfb1 ND |
557 | nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0) |
558 | goto nla_put_failure; | |
b1afce95 | 559 | #ifdef CONFIG_IPV6_MROUTE |
136ba622 | 560 | if ((all || type == NETCONFA_MC_FORWARDING) && |
d67b8c61 ND |
561 | nla_put_s32(skb, NETCONFA_MC_FORWARDING, |
562 | devconf->mc_forwarding) < 0) | |
563 | goto nla_put_failure; | |
b1afce95 | 564 | #endif |
136ba622 | 565 | if ((all || type == NETCONFA_PROXY_NEIGH) && |
c92d5491 | 566 | nla_put_s32(skb, NETCONFA_PROXY_NEIGH, devconf->proxy_ndp) < 0) |
567 | goto nla_put_failure; | |
568 | ||
136ba622 | 569 | if ((all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) && |
35103d11 AG |
570 | nla_put_s32(skb, NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, |
571 | devconf->ignore_routes_with_linkdown) < 0) | |
572 | goto nla_put_failure; | |
573 | ||
23452170 | 574 | out: |
053c095a JB |
575 | nlmsg_end(skb, nlh); |
576 | return 0; | |
f3a1bfb1 ND |
577 | |
578 | nla_put_failure: | |
579 | nlmsg_cancel(skb, nlh); | |
580 | return -EMSGSIZE; | |
581 | } | |
582 | ||
85b3daad DA |
583 | void inet6_netconf_notify_devconf(struct net *net, int event, int type, |
584 | int ifindex, struct ipv6_devconf *devconf) | |
f3a1bfb1 ND |
585 | { |
586 | struct sk_buff *skb; | |
587 | int err = -ENOBUFS; | |
588 | ||
927265bc | 589 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(type), GFP_KERNEL); |
63159f29 | 590 | if (!skb) |
f3a1bfb1 ND |
591 | goto errout; |
592 | ||
593 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, 0, 0, | |
85b3daad | 594 | event, 0, type); |
f3a1bfb1 ND |
595 | if (err < 0) { |
596 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
597 | WARN_ON(err == -EMSGSIZE); | |
598 | kfree_skb(skb); | |
599 | goto errout; | |
600 | } | |
927265bc | 601 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_NETCONF, NULL, GFP_KERNEL); |
f3a1bfb1 ND |
602 | return; |
603 | errout: | |
bd779028 | 604 | rtnl_set_sk_err(net, RTNLGRP_IPV6_NETCONF, err); |
f3a1bfb1 ND |
605 | } |
606 | ||
76f8f6cb ND |
607 | static const struct nla_policy devconf_ipv6_policy[NETCONFA_MAX+1] = { |
608 | [NETCONFA_IFINDEX] = { .len = sizeof(int) }, | |
609 | [NETCONFA_FORWARDING] = { .len = sizeof(int) }, | |
c92d5491 | 610 | [NETCONFA_PROXY_NEIGH] = { .len = sizeof(int) }, |
35103d11 | 611 | [NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN] = { .len = sizeof(int) }, |
76f8f6cb ND |
612 | }; |
613 | ||
614 | static int inet6_netconf_get_devconf(struct sk_buff *in_skb, | |
c21ef3e3 DA |
615 | struct nlmsghdr *nlh, |
616 | struct netlink_ext_ack *extack) | |
76f8f6cb ND |
617 | { |
618 | struct net *net = sock_net(in_skb->sk); | |
619 | struct nlattr *tb[NETCONFA_MAX+1]; | |
620 | struct netconfmsg *ncm; | |
621 | struct sk_buff *skb; | |
622 | struct ipv6_devconf *devconf; | |
623 | struct inet6_dev *in6_dev; | |
624 | struct net_device *dev; | |
625 | int ifindex; | |
626 | int err; | |
627 | ||
628 | err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX, | |
c21ef3e3 | 629 | devconf_ipv6_policy, extack); |
76f8f6cb ND |
630 | if (err < 0) |
631 | goto errout; | |
632 | ||
a97eb33f | 633 | err = -EINVAL; |
76f8f6cb ND |
634 | if (!tb[NETCONFA_IFINDEX]) |
635 | goto errout; | |
636 | ||
637 | ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]); | |
638 | switch (ifindex) { | |
639 | case NETCONFA_IFINDEX_ALL: | |
640 | devconf = net->ipv6.devconf_all; | |
641 | break; | |
642 | case NETCONFA_IFINDEX_DEFAULT: | |
643 | devconf = net->ipv6.devconf_dflt; | |
644 | break; | |
645 | default: | |
646 | dev = __dev_get_by_index(net, ifindex); | |
63159f29 | 647 | if (!dev) |
76f8f6cb ND |
648 | goto errout; |
649 | in6_dev = __in6_dev_get(dev); | |
63159f29 | 650 | if (!in6_dev) |
76f8f6cb ND |
651 | goto errout; |
652 | devconf = &in6_dev->cnf; | |
653 | break; | |
654 | } | |
655 | ||
656 | err = -ENOBUFS; | |
136ba622 | 657 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(NETCONFA_ALL), GFP_ATOMIC); |
63159f29 | 658 | if (!skb) |
76f8f6cb ND |
659 | goto errout; |
660 | ||
661 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, | |
662 | NETLINK_CB(in_skb).portid, | |
663 | nlh->nlmsg_seq, RTM_NEWNETCONF, 0, | |
136ba622 | 664 | NETCONFA_ALL); |
76f8f6cb ND |
665 | if (err < 0) { |
666 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
667 | WARN_ON(err == -EMSGSIZE); | |
668 | kfree_skb(skb); | |
669 | goto errout; | |
670 | } | |
671 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); | |
672 | errout: | |
673 | return err; | |
674 | } | |
675 | ||
7a674200 ND |
676 | static int inet6_netconf_dump_devconf(struct sk_buff *skb, |
677 | struct netlink_callback *cb) | |
678 | { | |
679 | struct net *net = sock_net(skb->sk); | |
680 | int h, s_h; | |
681 | int idx, s_idx; | |
682 | struct net_device *dev; | |
683 | struct inet6_dev *idev; | |
684 | struct hlist_head *head; | |
685 | ||
686 | s_h = cb->args[0]; | |
687 | s_idx = idx = cb->args[1]; | |
688 | ||
689 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
690 | idx = 0; | |
691 | head = &net->dev_index_head[h]; | |
692 | rcu_read_lock(); | |
63998ac2 ND |
693 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ |
694 | net->dev_base_seq; | |
7a674200 ND |
695 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
696 | if (idx < s_idx) | |
697 | goto cont; | |
698 | idev = __in6_dev_get(dev); | |
699 | if (!idev) | |
700 | goto cont; | |
701 | ||
702 | if (inet6_netconf_fill_devconf(skb, dev->ifindex, | |
703 | &idev->cnf, | |
704 | NETLINK_CB(cb->skb).portid, | |
705 | cb->nlh->nlmsg_seq, | |
706 | RTM_NEWNETCONF, | |
707 | NLM_F_MULTI, | |
136ba622 | 708 | NETCONFA_ALL) < 0) { |
7a674200 ND |
709 | rcu_read_unlock(); |
710 | goto done; | |
711 | } | |
63998ac2 | 712 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
7a674200 ND |
713 | cont: |
714 | idx++; | |
715 | } | |
716 | rcu_read_unlock(); | |
717 | } | |
718 | if (h == NETDEV_HASHENTRIES) { | |
719 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL, | |
720 | net->ipv6.devconf_all, | |
721 | NETLINK_CB(cb->skb).portid, | |
722 | cb->nlh->nlmsg_seq, | |
723 | RTM_NEWNETCONF, NLM_F_MULTI, | |
136ba622 | 724 | NETCONFA_ALL) < 0) |
7a674200 ND |
725 | goto done; |
726 | else | |
727 | h++; | |
728 | } | |
729 | if (h == NETDEV_HASHENTRIES + 1) { | |
730 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT, | |
731 | net->ipv6.devconf_dflt, | |
732 | NETLINK_CB(cb->skb).portid, | |
733 | cb->nlh->nlmsg_seq, | |
734 | RTM_NEWNETCONF, NLM_F_MULTI, | |
136ba622 | 735 | NETCONFA_ALL) < 0) |
7a674200 ND |
736 | goto done; |
737 | else | |
738 | h++; | |
739 | } | |
740 | done: | |
741 | cb->args[0] = h; | |
742 | cb->args[1] = idx; | |
743 | ||
744 | return skb->len; | |
745 | } | |
746 | ||
1da177e4 LT |
747 | #ifdef CONFIG_SYSCTL |
748 | static void dev_forward_change(struct inet6_dev *idev) | |
749 | { | |
750 | struct net_device *dev; | |
751 | struct inet6_ifaddr *ifa; | |
1da177e4 LT |
752 | |
753 | if (!idev) | |
754 | return; | |
755 | dev = idev->dev; | |
0187bdfb BH |
756 | if (idev->cnf.forwarding) |
757 | dev_disable_lro(dev); | |
1a940835 | 758 | if (dev->flags & IFF_MULTICAST) { |
2c5e8933 | 759 | if (idev->cnf.forwarding) { |
f3ee4010 | 760 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
761 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allrouters); |
762 | ipv6_dev_mc_inc(dev, &in6addr_sitelocal_allrouters); | |
763 | } else { | |
f3ee4010 | 764 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
765 | ipv6_dev_mc_dec(dev, &in6addr_interfacelocal_allrouters); |
766 | ipv6_dev_mc_dec(dev, &in6addr_sitelocal_allrouters); | |
767 | } | |
1da177e4 | 768 | } |
502a2ffd | 769 | |
770 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
2c12a74c MW |
771 | if (ifa->flags&IFA_F_TENTATIVE) |
772 | continue; | |
1da177e4 LT |
773 | if (idev->cnf.forwarding) |
774 | addrconf_join_anycast(ifa); | |
775 | else | |
776 | addrconf_leave_anycast(ifa); | |
777 | } | |
85b3daad DA |
778 | inet6_netconf_notify_devconf(dev_net(dev), RTM_NEWNETCONF, |
779 | NETCONFA_FORWARDING, | |
f3a1bfb1 | 780 | dev->ifindex, &idev->cnf); |
1da177e4 LT |
781 | } |
782 | ||
783 | ||
e186932b | 784 | static void addrconf_forward_change(struct net *net, __s32 newf) |
1da177e4 LT |
785 | { |
786 | struct net_device *dev; | |
787 | struct inet6_dev *idev; | |
788 | ||
4acd4945 | 789 | for_each_netdev(net, dev) { |
1da177e4 LT |
790 | idev = __in6_dev_get(dev); |
791 | if (idev) { | |
e186932b PE |
792 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
793 | idev->cnf.forwarding = newf; | |
1da177e4 LT |
794 | if (changed) |
795 | dev_forward_change(idev); | |
796 | } | |
1da177e4 | 797 | } |
1da177e4 | 798 | } |
c8fecf22 | 799 | |
013d97e9 | 800 | static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf) |
c8fecf22 | 801 | { |
bff16c2f | 802 | struct net *net; |
013d97e9 FR |
803 | int old; |
804 | ||
805 | if (!rtnl_trylock()) | |
806 | return restart_syscall(); | |
bff16c2f PE |
807 | |
808 | net = (struct net *)table->extra2; | |
013d97e9 FR |
809 | old = *p; |
810 | *p = newf; | |
b325fddb | 811 | |
013d97e9 | 812 | if (p == &net->ipv6.devconf_dflt->forwarding) { |
f3a1bfb1 | 813 | if ((!newf) ^ (!old)) |
85b3daad DA |
814 | inet6_netconf_notify_devconf(net, RTM_NEWNETCONF, |
815 | NETCONFA_FORWARDING, | |
f3a1bfb1 ND |
816 | NETCONFA_IFINDEX_DEFAULT, |
817 | net->ipv6.devconf_dflt); | |
013d97e9 FR |
818 | rtnl_unlock(); |
819 | return 0; | |
88af182e | 820 | } |
c8fecf22 | 821 | |
e186932b | 822 | if (p == &net->ipv6.devconf_all->forwarding) { |
d26c638c ND |
823 | int old_dflt = net->ipv6.devconf_dflt->forwarding; |
824 | ||
e186932b | 825 | net->ipv6.devconf_dflt->forwarding = newf; |
d26c638c | 826 | if ((!newf) ^ (!old_dflt)) |
85b3daad DA |
827 | inet6_netconf_notify_devconf(net, RTM_NEWNETCONF, |
828 | NETCONFA_FORWARDING, | |
d26c638c ND |
829 | NETCONFA_IFINDEX_DEFAULT, |
830 | net->ipv6.devconf_dflt); | |
831 | ||
e186932b | 832 | addrconf_forward_change(net, newf); |
f3a1bfb1 | 833 | if ((!newf) ^ (!old)) |
85b3daad DA |
834 | inet6_netconf_notify_devconf(net, RTM_NEWNETCONF, |
835 | NETCONFA_FORWARDING, | |
f3a1bfb1 ND |
836 | NETCONFA_IFINDEX_ALL, |
837 | net->ipv6.devconf_all); | |
013d97e9 | 838 | } else if ((!newf) ^ (!old)) |
c8fecf22 | 839 | dev_forward_change((struct inet6_dev *)table->extra1); |
0187bdfb | 840 | rtnl_unlock(); |
c8fecf22 | 841 | |
013d97e9 | 842 | if (newf) |
7b4da532 | 843 | rt6_purge_dflt_routers(net); |
b325fddb | 844 | return 1; |
c8fecf22 | 845 | } |
35103d11 AG |
846 | |
847 | static void addrconf_linkdown_change(struct net *net, __s32 newf) | |
848 | { | |
849 | struct net_device *dev; | |
850 | struct inet6_dev *idev; | |
851 | ||
852 | for_each_netdev(net, dev) { | |
853 | idev = __in6_dev_get(dev); | |
854 | if (idev) { | |
855 | int changed = (!idev->cnf.ignore_routes_with_linkdown) ^ (!newf); | |
856 | ||
857 | idev->cnf.ignore_routes_with_linkdown = newf; | |
858 | if (changed) | |
859 | inet6_netconf_notify_devconf(dev_net(dev), | |
85b3daad | 860 | RTM_NEWNETCONF, |
35103d11 AG |
861 | NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, |
862 | dev->ifindex, | |
863 | &idev->cnf); | |
864 | } | |
865 | } | |
866 | } | |
867 | ||
868 | static int addrconf_fixup_linkdown(struct ctl_table *table, int *p, int newf) | |
869 | { | |
870 | struct net *net; | |
871 | int old; | |
872 | ||
873 | if (!rtnl_trylock()) | |
874 | return restart_syscall(); | |
875 | ||
876 | net = (struct net *)table->extra2; | |
877 | old = *p; | |
878 | *p = newf; | |
879 | ||
880 | if (p == &net->ipv6.devconf_dflt->ignore_routes_with_linkdown) { | |
881 | if ((!newf) ^ (!old)) | |
882 | inet6_netconf_notify_devconf(net, | |
85b3daad | 883 | RTM_NEWNETCONF, |
35103d11 AG |
884 | NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, |
885 | NETCONFA_IFINDEX_DEFAULT, | |
886 | net->ipv6.devconf_dflt); | |
887 | rtnl_unlock(); | |
888 | return 0; | |
889 | } | |
890 | ||
891 | if (p == &net->ipv6.devconf_all->ignore_routes_with_linkdown) { | |
892 | net->ipv6.devconf_dflt->ignore_routes_with_linkdown = newf; | |
893 | addrconf_linkdown_change(net, newf); | |
894 | if ((!newf) ^ (!old)) | |
895 | inet6_netconf_notify_devconf(net, | |
85b3daad | 896 | RTM_NEWNETCONF, |
35103d11 AG |
897 | NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, |
898 | NETCONFA_IFINDEX_ALL, | |
899 | net->ipv6.devconf_all); | |
900 | } | |
901 | rtnl_unlock(); | |
902 | ||
903 | return 1; | |
904 | } | |
905 | ||
1da177e4 LT |
906 | #endif |
907 | ||
5c578aed | 908 | /* Nobody refers to this ifaddr, destroy it */ |
1da177e4 LT |
909 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) |
910 | { | |
c2e21293 | 911 | WARN_ON(!hlist_unhashed(&ifp->addr_lst)); |
547b792c | 912 | |
1da177e4 | 913 | #ifdef NET_REFCNT_DEBUG |
91df42be | 914 | pr_debug("%s\n", __func__); |
1da177e4 LT |
915 | #endif |
916 | ||
917 | in6_dev_put(ifp->idev); | |
918 | ||
c15b1cca HFS |
919 | if (cancel_delayed_work(&ifp->dad_work)) |
920 | pr_notice("delayed DAD work was pending while freeing ifa=%p\n", | |
921 | ifp); | |
1da177e4 | 922 | |
e9d3e084 | 923 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
f3213831 | 924 | pr_warn("Freeing alive inet6 address %p\n", ifp); |
1da177e4 LT |
925 | return; |
926 | } | |
94e187c0 | 927 | ip6_rt_put(ifp->rt); |
1da177e4 | 928 | |
e5785985 | 929 | kfree_rcu(ifp, rcu); |
1da177e4 LT |
930 | } |
931 | ||
e55ffac6 BH |
932 | static void |
933 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
934 | { | |
502a2ffd | 935 | struct list_head *p; |
8a6ce0c0 | 936 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
937 | |
938 | /* | |
939 | * Each device address list is sorted in order of scope - | |
940 | * global before linklocal. | |
941 | */ | |
502a2ffd | 942 | list_for_each(p, &idev->addr_list) { |
943 | struct inet6_ifaddr *ifa | |
944 | = list_entry(p, struct inet6_ifaddr, if_list); | |
8a6ce0c0 | 945 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
946 | break; |
947 | } | |
948 | ||
b54c9b98 | 949 | list_add_tail(&ifp->if_list, p); |
e55ffac6 BH |
950 | } |
951 | ||
ddbe5032 | 952 | static u32 inet6_addr_hash(const struct in6_addr *addr) |
3eb84f49 | 953 | { |
ddbe5032 | 954 | return hash_32(ipv6_addr_hash(addr), IN6_ADDR_HSIZE_SHIFT); |
3eb84f49 YH |
955 | } |
956 | ||
1da177e4 LT |
957 | /* On success it returns ifp with increased reference count */ |
958 | ||
959 | static struct inet6_ifaddr * | |
3f8f5298 JP |
960 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
961 | const struct in6_addr *peer_addr, int pfxlen, | |
8a226b2c | 962 | int scope, u32 flags, u32 valid_lft, u32 prefered_lft) |
1da177e4 | 963 | { |
df789fe7 | 964 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
965 | struct inet6_ifaddr *ifa = NULL; |
966 | struct rt6_info *rt; | |
3ad7d246 | 967 | struct in6_validator_info i6vi; |
3a88a81d | 968 | unsigned int hash; |
1da177e4 | 969 | int err = 0; |
d68b8270 YH |
970 | int addr_type = ipv6_addr_type(addr); |
971 | ||
972 | if (addr_type == IPV6_ADDR_ANY || | |
973 | addr_type & IPV6_ADDR_MULTICAST || | |
974 | (!(idev->dev->flags & IFF_LOOPBACK) && | |
975 | addr_type & IPV6_ADDR_LOOPBACK)) | |
976 | return ERR_PTR(-EADDRNOTAVAIL); | |
1da177e4 | 977 | |
8814c4b5 | 978 | rcu_read_lock_bh(); |
3ad7d246 KJ |
979 | |
980 | in6_dev_hold(idev); | |
981 | ||
1da177e4 LT |
982 | if (idev->dead) { |
983 | err = -ENODEV; /*XXX*/ | |
984 | goto out2; | |
985 | } | |
986 | ||
56d417b1 | 987 | if (idev->cnf.disable_ipv6) { |
9bdd8d40 BH |
988 | err = -EACCES; |
989 | goto out2; | |
990 | } | |
991 | ||
3ad7d246 KJ |
992 | i6vi.i6vi_addr = *addr; |
993 | i6vi.i6vi_dev = idev; | |
994 | rcu_read_unlock_bh(); | |
995 | ||
996 | err = inet6addr_validator_notifier_call_chain(NETDEV_UP, &i6vi); | |
997 | ||
998 | rcu_read_lock_bh(); | |
999 | err = notifier_to_errno(err); | |
1000 | if (err) | |
1001 | goto out2; | |
1002 | ||
5c578aed | 1003 | spin_lock(&addrconf_hash_lock); |
1da177e4 LT |
1004 | |
1005 | /* Ignore adding duplicate addresses on an interface */ | |
c346dca1 | 1006 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
ba3542e1 | 1007 | ADBG("ipv6_add_addr: already assigned\n"); |
1da177e4 LT |
1008 | err = -EEXIST; |
1009 | goto out; | |
1010 | } | |
1011 | ||
322f74a4 | 1012 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 | 1013 | |
63159f29 | 1014 | if (!ifa) { |
ba3542e1 | 1015 | ADBG("ipv6_add_addr: malloc failed\n"); |
1da177e4 LT |
1016 | err = -ENOBUFS; |
1017 | goto out; | |
1018 | } | |
1019 | ||
8f031519 | 1020 | rt = addrconf_dst_alloc(idev, addr, false); |
1da177e4 LT |
1021 | if (IS_ERR(rt)) { |
1022 | err = PTR_ERR(rt); | |
1023 | goto out; | |
1024 | } | |
1025 | ||
df789fe7 DF |
1026 | if (net->ipv6.devconf_all->disable_policy || |
1027 | idev->cnf.disable_policy) | |
1028 | rt->dst.flags |= DST_NOPOLICY; | |
1029 | ||
bba24896 JP |
1030 | neigh_parms_data_state_setall(idev->nd_parms); |
1031 | ||
4e3fd7a0 | 1032 | ifa->addr = *addr; |
3f8f5298 JP |
1033 | if (peer_addr) |
1034 | ifa->peer_addr = *peer_addr; | |
1da177e4 LT |
1035 | |
1036 | spin_lock_init(&ifa->lock); | |
c15b1cca | 1037 | INIT_DELAYED_WORK(&ifa->dad_work, addrconf_dad_work); |
c2e21293 | 1038 | INIT_HLIST_NODE(&ifa->addr_lst); |
1da177e4 LT |
1039 | ifa->scope = scope; |
1040 | ifa->prefix_len = pfxlen; | |
66eb9f86 MB |
1041 | ifa->flags = flags; |
1042 | /* No need to add the TENTATIVE flag for addresses with NODAD */ | |
1043 | if (!(flags & IFA_F_NODAD)) | |
1044 | ifa->flags |= IFA_F_TENTATIVE; | |
8a226b2c JB |
1045 | ifa->valid_lft = valid_lft; |
1046 | ifa->prefered_lft = prefered_lft; | |
1da177e4 | 1047 | ifa->cstamp = ifa->tstamp = jiffies; |
617fe29d | 1048 | ifa->tokenized = false; |
1da177e4 | 1049 | |
57f5f544 KF |
1050 | ifa->rt = rt; |
1051 | ||
1da177e4 | 1052 | ifa->idev = idev; |
1da177e4 | 1053 | /* For caller */ |
271201c0 | 1054 | refcount_set(&ifa->refcnt, 1); |
1da177e4 LT |
1055 | |
1056 | /* Add to big hash table */ | |
ddbe5032 | 1057 | hash = inet6_addr_hash(addr); |
1da177e4 | 1058 | |
5c578aed | 1059 | hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]); |
5c578aed | 1060 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
1061 | |
1062 | write_lock(&idev->lock); | |
1063 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 1064 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 | 1065 | |
1da177e4 | 1066 | if (ifa->flags&IFA_F_TEMPORARY) { |
372e6c8f | 1067 | list_add(&ifa->tmp_list, &idev->tempaddr_list); |
1da177e4 LT |
1068 | in6_ifa_hold(ifa); |
1069 | } | |
1da177e4 | 1070 | |
1da177e4 LT |
1071 | in6_ifa_hold(ifa); |
1072 | write_unlock(&idev->lock); | |
1073 | out2: | |
8814c4b5 | 1074 | rcu_read_unlock_bh(); |
1da177e4 | 1075 | |
fd92833a | 1076 | if (likely(err == 0)) |
f88c91dd | 1077 | inet6addr_notifier_call_chain(NETDEV_UP, ifa); |
1da177e4 LT |
1078 | else { |
1079 | kfree(ifa); | |
3ad7d246 | 1080 | in6_dev_put(idev); |
1da177e4 LT |
1081 | ifa = ERR_PTR(err); |
1082 | } | |
1083 | ||
1084 | return ifa; | |
1085 | out: | |
5c578aed | 1086 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
1087 | goto out2; |
1088 | } | |
1089 | ||
5b84efec TH |
1090 | enum cleanup_prefix_rt_t { |
1091 | CLEANUP_PREFIX_RT_NOP, /* no cleanup action for prefix route */ | |
1092 | CLEANUP_PREFIX_RT_DEL, /* delete the prefix route */ | |
1093 | CLEANUP_PREFIX_RT_EXPIRE, /* update the lifetime of the prefix route */ | |
1094 | }; | |
1095 | ||
1096 | /* | |
1097 | * Check, whether the prefix for ifp would still need a prefix route | |
1098 | * after deleting ifp. The function returns one of the CLEANUP_PREFIX_RT_* | |
1099 | * constants. | |
1100 | * | |
1101 | * 1) we don't purge prefix if address was not permanent. | |
1102 | * prefix is managed by its own lifetime. | |
1103 | * 2) we also don't purge, if the address was IFA_F_NOPREFIXROUTE. | |
1104 | * 3) if there are no addresses, delete prefix. | |
1105 | * 4) if there are still other permanent address(es), | |
1106 | * corresponding prefix is still permanent. | |
1107 | * 5) if there are still other addresses with IFA_F_NOPREFIXROUTE, | |
1108 | * don't purge the prefix, assume user space is managing it. | |
1109 | * 6) otherwise, update prefix lifetime to the | |
1110 | * longest valid lifetime among the corresponding | |
1111 | * addresses on the device. | |
1112 | * Note: subsequent RA will update lifetime. | |
1113 | **/ | |
1114 | static enum cleanup_prefix_rt_t | |
1115 | check_cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long *expires) | |
1116 | { | |
1117 | struct inet6_ifaddr *ifa; | |
1118 | struct inet6_dev *idev = ifp->idev; | |
1119 | unsigned long lifetime; | |
1120 | enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_DEL; | |
1121 | ||
1122 | *expires = jiffies; | |
1123 | ||
1124 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
1125 | if (ifa == ifp) | |
1126 | continue; | |
1127 | if (!ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
1128 | ifp->prefix_len)) | |
1129 | continue; | |
1130 | if (ifa->flags & (IFA_F_PERMANENT | IFA_F_NOPREFIXROUTE)) | |
1131 | return CLEANUP_PREFIX_RT_NOP; | |
1132 | ||
1133 | action = CLEANUP_PREFIX_RT_EXPIRE; | |
1134 | ||
1135 | spin_lock(&ifa->lock); | |
1136 | ||
1137 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); | |
1138 | /* | |
1139 | * Note: Because this address is | |
1140 | * not permanent, lifetime < | |
1141 | * LONG_MAX / HZ here. | |
1142 | */ | |
1143 | if (time_before(*expires, ifa->tstamp + lifetime * HZ)) | |
1144 | *expires = ifa->tstamp + lifetime * HZ; | |
1145 | spin_unlock(&ifa->lock); | |
1146 | } | |
1147 | ||
1148 | return action; | |
1149 | } | |
1150 | ||
1151 | static void | |
1152 | cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long expires, bool del_rt) | |
1153 | { | |
1154 | struct rt6_info *rt; | |
1155 | ||
1156 | rt = addrconf_get_prefix_route(&ifp->addr, | |
1157 | ifp->prefix_len, | |
1158 | ifp->idev->dev, | |
1159 | 0, RTF_GATEWAY | RTF_DEFAULT); | |
1160 | if (rt) { | |
1161 | if (del_rt) | |
1162 | ip6_del_rt(rt); | |
1163 | else { | |
1164 | if (!(rt->rt6i_flags & RTF_EXPIRES)) | |
1165 | rt6_set_expires(rt, expires); | |
1166 | ip6_rt_put(rt); | |
1167 | } | |
1168 | } | |
1169 | } | |
1170 | ||
1171 | ||
1da177e4 LT |
1172 | /* This function wants to get referenced ifp and releases it before return */ |
1173 | ||
1174 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
1175 | { | |
4c5ff6a6 | 1176 | int state; |
5b84efec TH |
1177 | enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_NOP; |
1178 | unsigned long expires; | |
1da177e4 | 1179 | |
c15b1cca HFS |
1180 | ASSERT_RTNL(); |
1181 | ||
8e8e676d | 1182 | spin_lock_bh(&ifp->lock); |
4c5ff6a6 | 1183 | state = ifp->state; |
e9d3e084 | 1184 | ifp->state = INET6_IFADDR_STATE_DEAD; |
8e8e676d | 1185 | spin_unlock_bh(&ifp->lock); |
4c5ff6a6 HX |
1186 | |
1187 | if (state == INET6_IFADDR_STATE_DEAD) | |
1188 | goto out; | |
1da177e4 | 1189 | |
5c578aed | 1190 | spin_lock_bh(&addrconf_hash_lock); |
1191 | hlist_del_init_rcu(&ifp->addr_lst); | |
5c578aed | 1192 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 | 1193 | |
5b84efec | 1194 | write_lock_bh(&ifp->idev->lock); |
5d9efa7e | 1195 | |
1da177e4 | 1196 | if (ifp->flags&IFA_F_TEMPORARY) { |
372e6c8f | 1197 | list_del(&ifp->tmp_list); |
1198 | if (ifp->ifpub) { | |
1199 | in6_ifa_put(ifp->ifpub); | |
1200 | ifp->ifpub = NULL; | |
1da177e4 | 1201 | } |
372e6c8f | 1202 | __in6_ifa_put(ifp); |
1da177e4 | 1203 | } |
1da177e4 | 1204 | |
5b84efec TH |
1205 | if (ifp->flags & IFA_F_PERMANENT && !(ifp->flags & IFA_F_NOPREFIXROUTE)) |
1206 | action = check_cleanup_prefix_route(ifp, &expires); | |
502a2ffd | 1207 | |
5b84efec TH |
1208 | list_del_init(&ifp->if_list); |
1209 | __in6_ifa_put(ifp); | |
1210 | ||
1211 | write_unlock_bh(&ifp->idev->lock); | |
1da177e4 | 1212 | |
c15b1cca | 1213 | addrconf_del_dad_work(ifp); |
b2238566 | 1214 | |
1da177e4 LT |
1215 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
1216 | ||
f88c91dd | 1217 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifp); |
1da177e4 | 1218 | |
5b84efec TH |
1219 | if (action != CLEANUP_PREFIX_RT_NOP) { |
1220 | cleanup_prefix_route(ifp, expires, | |
1221 | action == CLEANUP_PREFIX_RT_DEL); | |
1da177e4 LT |
1222 | } |
1223 | ||
c3968a85 DW |
1224 | /* clean up prefsrc entries */ |
1225 | rt6_remove_prefsrc(ifp); | |
4c5ff6a6 | 1226 | out: |
1da177e4 LT |
1227 | in6_ifa_put(ifp); |
1228 | } | |
1229 | ||
1da177e4 LT |
1230 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) |
1231 | { | |
1232 | struct inet6_dev *idev = ifp->idev; | |
1233 | struct in6_addr addr, *tmpaddr; | |
76f793e3 | 1234 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age; |
eac55bf9 | 1235 | unsigned long regen_advance; |
1da177e4 LT |
1236 | int tmp_plen; |
1237 | int ret = 0; | |
95c385b4 | 1238 | u32 addr_flags; |
76f793e3 | 1239 | unsigned long now = jiffies; |
76506a98 | 1240 | long max_desync_factor; |
7aa8e63f | 1241 | s32 cnf_temp_preferred_lft; |
1da177e4 | 1242 | |
53bd6749 | 1243 | write_lock_bh(&idev->lock); |
1da177e4 LT |
1244 | if (ift) { |
1245 | spin_lock_bh(&ift->lock); | |
1246 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
1247 | spin_unlock_bh(&ift->lock); | |
1248 | tmpaddr = &addr; | |
1249 | } else { | |
1250 | tmpaddr = NULL; | |
1251 | } | |
1252 | retry: | |
1253 | in6_dev_hold(idev); | |
1254 | if (idev->cnf.use_tempaddr <= 0) { | |
53bd6749 | 1255 | write_unlock_bh(&idev->lock); |
f3213831 | 1256 | pr_info("%s: use_tempaddr is disabled\n", __func__); |
1da177e4 LT |
1257 | in6_dev_put(idev); |
1258 | ret = -1; | |
1259 | goto out; | |
1260 | } | |
1261 | spin_lock_bh(&ifp->lock); | |
1262 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
1263 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
1264 | spin_unlock_bh(&ifp->lock); | |
53bd6749 | 1265 | write_unlock_bh(&idev->lock); |
f3213831 JP |
1266 | pr_warn("%s: regeneration time exceeded - disabled temporary address support\n", |
1267 | __func__); | |
1da177e4 LT |
1268 | in6_dev_put(idev); |
1269 | ret = -1; | |
1270 | goto out; | |
1271 | } | |
1272 | in6_ifa_hold(ifp); | |
1273 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
9d6280da | 1274 | ipv6_try_regen_rndid(idev, tmpaddr); |
1da177e4 | 1275 | memcpy(&addr.s6_addr[8], idev->rndid, 8); |
76f793e3 | 1276 | age = (now - ifp->tstamp) / HZ; |
76506a98 JB |
1277 | |
1278 | regen_advance = idev->cnf.regen_max_retry * | |
1279 | idev->cnf.dad_transmits * | |
1280 | NEIGH_VAR(idev->nd_parms, RETRANS_TIME) / HZ; | |
1281 | ||
1282 | /* recalculate max_desync_factor each time and update | |
1283 | * idev->desync_factor if it's larger | |
1284 | */ | |
7aa8e63f | 1285 | cnf_temp_preferred_lft = READ_ONCE(idev->cnf.temp_prefered_lft); |
76506a98 JB |
1286 | max_desync_factor = min_t(__u32, |
1287 | idev->cnf.max_desync_factor, | |
7aa8e63f | 1288 | cnf_temp_preferred_lft - regen_advance); |
76506a98 JB |
1289 | |
1290 | if (unlikely(idev->desync_factor > max_desync_factor)) { | |
1291 | if (max_desync_factor > 0) { | |
1292 | get_random_bytes(&idev->desync_factor, | |
1293 | sizeof(idev->desync_factor)); | |
1294 | idev->desync_factor %= max_desync_factor; | |
1295 | } else { | |
1296 | idev->desync_factor = 0; | |
1297 | } | |
1298 | } | |
1299 | ||
1da177e4 LT |
1300 | tmp_valid_lft = min_t(__u32, |
1301 | ifp->valid_lft, | |
7a876b0e | 1302 | idev->cnf.temp_valid_lft + age); |
7aa8e63f | 1303 | tmp_prefered_lft = cnf_temp_preferred_lft + age - |
76506a98 | 1304 | idev->desync_factor; |
76506a98 | 1305 | tmp_prefered_lft = min_t(__u32, ifp->prefered_lft, tmp_prefered_lft); |
1da177e4 | 1306 | tmp_plen = ifp->prefix_len; |
1da177e4 LT |
1307 | tmp_tstamp = ifp->tstamp; |
1308 | spin_unlock_bh(&ifp->lock); | |
1309 | ||
53bd6749 | 1310 | write_unlock_bh(&idev->lock); |
95c385b4 | 1311 | |
eac55bf9 BB |
1312 | /* A temporary address is created only if this calculated Preferred |
1313 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, | |
1314 | * an implementation must not create a temporary address with a zero | |
1315 | * Preferred Lifetime. | |
ecab6701 HK |
1316 | * Use age calculation as in addrconf_verify to avoid unnecessary |
1317 | * temporary addresses being generated. | |
eac55bf9 | 1318 | */ |
ecab6701 HK |
1319 | age = (now - tmp_tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; |
1320 | if (tmp_prefered_lft <= regen_advance + age) { | |
eac55bf9 BB |
1321 | in6_ifa_put(ifp); |
1322 | in6_dev_put(idev); | |
1323 | ret = -1; | |
1324 | goto out; | |
1325 | } | |
1326 | ||
95c385b4 NH |
1327 | addr_flags = IFA_F_TEMPORARY; |
1328 | /* set in addrconf_prefix_rcv() */ | |
1329 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
1330 | addr_flags |= IFA_F_OPTIMISTIC; | |
1331 | ||
4b08a8f1 HFS |
1332 | ift = ipv6_add_addr(idev, &addr, NULL, tmp_plen, |
1333 | ipv6_addr_scope(&addr), addr_flags, | |
1334 | tmp_valid_lft, tmp_prefered_lft); | |
1335 | if (IS_ERR(ift)) { | |
1da177e4 LT |
1336 | in6_ifa_put(ifp); |
1337 | in6_dev_put(idev); | |
f3213831 | 1338 | pr_info("%s: retry temporary address regeneration\n", __func__); |
1da177e4 | 1339 | tmpaddr = &addr; |
53bd6749 | 1340 | write_lock_bh(&idev->lock); |
1da177e4 LT |
1341 | goto retry; |
1342 | } | |
1343 | ||
1344 | spin_lock_bh(&ift->lock); | |
1345 | ift->ifpub = ifp; | |
76f793e3 | 1346 | ift->cstamp = now; |
1da177e4 LT |
1347 | ift->tstamp = tmp_tstamp; |
1348 | spin_unlock_bh(&ift->lock); | |
1349 | ||
cf22f9a2 | 1350 | addrconf_dad_start(ift); |
1da177e4 LT |
1351 | in6_ifa_put(ift); |
1352 | in6_dev_put(idev); | |
1353 | out: | |
1354 | return ret; | |
1355 | } | |
1da177e4 LT |
1356 | |
1357 | /* | |
072047e4 | 1358 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 1359 | */ |
a9b05723 YH |
1360 | enum { |
1361 | IPV6_SADDR_RULE_INIT = 0, | |
1362 | IPV6_SADDR_RULE_LOCAL, | |
1363 | IPV6_SADDR_RULE_SCOPE, | |
1364 | IPV6_SADDR_RULE_PREFERRED, | |
1365 | #ifdef CONFIG_IPV6_MIP6 | |
1366 | IPV6_SADDR_RULE_HOA, | |
1367 | #endif | |
1368 | IPV6_SADDR_RULE_OIF, | |
1369 | IPV6_SADDR_RULE_LABEL, | |
a9b05723 | 1370 | IPV6_SADDR_RULE_PRIVACY, |
a9b05723 YH |
1371 | IPV6_SADDR_RULE_ORCHID, |
1372 | IPV6_SADDR_RULE_PREFIX, | |
7fd2561e EK |
1373 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
1374 | IPV6_SADDR_RULE_NOT_OPTIMISTIC, | |
1375 | #endif | |
a9b05723 YH |
1376 | IPV6_SADDR_RULE_MAX |
1377 | }; | |
1378 | ||
072047e4 | 1379 | struct ipv6_saddr_score { |
a9b05723 YH |
1380 | int rule; |
1381 | int addr_type; | |
1382 | struct inet6_ifaddr *ifa; | |
1383 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); | |
1384 | int scopedist; | |
1385 | int matchlen; | |
072047e4 YH |
1386 | }; |
1387 | ||
a9b05723 | 1388 | struct ipv6_saddr_dst { |
9acd9f3a | 1389 | const struct in6_addr *addr; |
a9b05723 YH |
1390 | int ifindex; |
1391 | int scope; | |
1392 | int label; | |
7cbca67c | 1393 | unsigned int prefs; |
a9b05723 | 1394 | }; |
072047e4 | 1395 | |
b6f99a21 | 1396 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 1397 | { |
45bb0060 | 1398 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK)) |
072047e4 YH |
1399 | return 1; |
1400 | return 0; | |
1da177e4 LT |
1401 | } |
1402 | ||
35e015e1 MC |
1403 | static bool ipv6_use_optimistic_addr(struct net *net, |
1404 | struct inet6_dev *idev) | |
7fd2561e EK |
1405 | { |
1406 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
35e015e1 MC |
1407 | if (!idev) |
1408 | return false; | |
1409 | if (!net->ipv6.devconf_all->optimistic_dad && !idev->cnf.optimistic_dad) | |
1410 | return false; | |
1411 | if (!net->ipv6.devconf_all->use_optimistic && !idev->cnf.use_optimistic) | |
1412 | return false; | |
1413 | ||
1414 | return true; | |
7fd2561e EK |
1415 | #else |
1416 | return false; | |
1417 | #endif | |
1418 | } | |
1419 | ||
3de23255 BT |
1420 | static int ipv6_get_saddr_eval(struct net *net, |
1421 | struct ipv6_saddr_score *score, | |
a9b05723 YH |
1422 | struct ipv6_saddr_dst *dst, |
1423 | int i) | |
1424 | { | |
1425 | int ret; | |
1426 | ||
1427 | if (i <= score->rule) { | |
1428 | switch (i) { | |
1429 | case IPV6_SADDR_RULE_SCOPE: | |
1430 | ret = score->scopedist; | |
1431 | break; | |
1432 | case IPV6_SADDR_RULE_PREFIX: | |
1433 | ret = score->matchlen; | |
1434 | break; | |
1435 | default: | |
1436 | ret = !!test_bit(i, score->scorebits); | |
1437 | } | |
1438 | goto out; | |
1439 | } | |
1440 | ||
1441 | switch (i) { | |
1442 | case IPV6_SADDR_RULE_INIT: | |
1443 | /* Rule 0: remember if hiscore is not ready yet */ | |
1444 | ret = !!score->ifa; | |
1445 | break; | |
1446 | case IPV6_SADDR_RULE_LOCAL: | |
1447 | /* Rule 1: Prefer same address */ | |
1448 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); | |
1449 | break; | |
1450 | case IPV6_SADDR_RULE_SCOPE: | |
1451 | /* Rule 2: Prefer appropriate scope | |
1452 | * | |
1453 | * ret | |
1454 | * ^ | |
1455 | * -1 | d 15 | |
1456 | * ---+--+-+---> scope | |
1457 | * | | |
1458 | * | d is scope of the destination. | |
1459 | * B-d | \ | |
1460 | * | \ <- smaller scope is better if | |
db9c7c39 | 1461 | * B-15 | \ if scope is enough for destination. |
a9b05723 YH |
1462 | * | ret = B - scope (-1 <= scope >= d <= 15). |
1463 | * d-C-1 | / | |
1464 | * |/ <- greater is better | |
1465 | * -C / if scope is not enough for destination. | |
1466 | * /| ret = scope - C (-1 <= d < scope <= 15). | |
1467 | * | |
1468 | * d - C - 1 < B -15 (for all -1 <= d <= 15). | |
1469 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. | |
1470 | * Assume B = 0 and we get C > 29. | |
1471 | */ | |
1472 | ret = __ipv6_addr_src_scope(score->addr_type); | |
1473 | if (ret >= dst->scope) | |
1474 | ret = -ret; | |
1475 | else | |
1476 | ret -= 128; /* 30 is enough */ | |
1477 | score->scopedist = ret; | |
1478 | break; | |
1479 | case IPV6_SADDR_RULE_PREFERRED: | |
7fd2561e | 1480 | { |
a9b05723 | 1481 | /* Rule 3: Avoid deprecated and optimistic addresses */ |
7fd2561e EK |
1482 | u8 avoid = IFA_F_DEPRECATED; |
1483 | ||
35e015e1 | 1484 | if (!ipv6_use_optimistic_addr(net, score->ifa->idev)) |
7fd2561e | 1485 | avoid |= IFA_F_OPTIMISTIC; |
a9b05723 | 1486 | ret = ipv6_saddr_preferred(score->addr_type) || |
7fd2561e | 1487 | !(score->ifa->flags & avoid); |
a9b05723 | 1488 | break; |
7fd2561e | 1489 | } |
a9b05723 YH |
1490 | #ifdef CONFIG_IPV6_MIP6 |
1491 | case IPV6_SADDR_RULE_HOA: | |
7cbca67c | 1492 | { |
a9b05723 | 1493 | /* Rule 4: Prefer home address */ |
7cbca67c YH |
1494 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
1495 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; | |
a9b05723 | 1496 | break; |
7cbca67c | 1497 | } |
a9b05723 YH |
1498 | #endif |
1499 | case IPV6_SADDR_RULE_OIF: | |
1500 | /* Rule 5: Prefer outgoing interface */ | |
1501 | ret = (!dst->ifindex || | |
1502 | dst->ifindex == score->ifa->idev->dev->ifindex); | |
1503 | break; | |
1504 | case IPV6_SADDR_RULE_LABEL: | |
1505 | /* Rule 6: Prefer matching label */ | |
3de23255 BT |
1506 | ret = ipv6_addr_label(net, |
1507 | &score->ifa->addr, score->addr_type, | |
a9b05723 YH |
1508 | score->ifa->idev->dev->ifindex) == dst->label; |
1509 | break; | |
a9b05723 | 1510 | case IPV6_SADDR_RULE_PRIVACY: |
7cbca67c | 1511 | { |
a9b05723 | 1512 | /* Rule 7: Prefer public address |
25985edc | 1513 | * Note: prefer temporary address if use_tempaddr >= 2 |
a9b05723 | 1514 | */ |
7cbca67c YH |
1515 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
1516 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : | |
1517 | score->ifa->idev->cnf.use_tempaddr >= 2; | |
1518 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; | |
a9b05723 | 1519 | break; |
7cbca67c | 1520 | } |
a9b05723 YH |
1521 | case IPV6_SADDR_RULE_ORCHID: |
1522 | /* Rule 8-: Prefer ORCHID vs ORCHID or | |
1523 | * non-ORCHID vs non-ORCHID | |
1524 | */ | |
1525 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ | |
1526 | ipv6_addr_orchid(dst->addr)); | |
1527 | break; | |
1528 | case IPV6_SADDR_RULE_PREFIX: | |
1529 | /* Rule 8: Use longest matching prefix */ | |
91b4b04f YH |
1530 | ret = ipv6_addr_diff(&score->ifa->addr, dst->addr); |
1531 | if (ret > score->ifa->prefix_len) | |
1532 | ret = score->ifa->prefix_len; | |
1533 | score->matchlen = ret; | |
a9b05723 | 1534 | break; |
7fd2561e EK |
1535 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
1536 | case IPV6_SADDR_RULE_NOT_OPTIMISTIC: | |
1537 | /* Optimistic addresses still have lower precedence than other | |
1538 | * preferred addresses. | |
1539 | */ | |
1540 | ret = !(score->ifa->flags & IFA_F_OPTIMISTIC); | |
1541 | break; | |
1542 | #endif | |
a9b05723 YH |
1543 | default: |
1544 | ret = 0; | |
1545 | } | |
1546 | ||
1547 | if (ret) | |
1548 | __set_bit(i, score->scorebits); | |
1549 | score->rule = i; | |
1550 | out: | |
1551 | return ret; | |
1552 | } | |
1553 | ||
c0b8da1e YH |
1554 | static int __ipv6_dev_get_saddr(struct net *net, |
1555 | struct ipv6_saddr_dst *dst, | |
c0b8da1e YH |
1556 | struct inet6_dev *idev, |
1557 | struct ipv6_saddr_score *scores, | |
1558 | int hiscore_idx) | |
9131f3de | 1559 | { |
c0b8da1e | 1560 | struct ipv6_saddr_score *score = &scores[1 - hiscore_idx], *hiscore = &scores[hiscore_idx]; |
9131f3de YH |
1561 | |
1562 | read_lock_bh(&idev->lock); | |
1563 | list_for_each_entry(score->ifa, &idev->addr_list, if_list) { | |
1564 | int i; | |
1565 | ||
1566 | /* | |
1567 | * - Tentative Address (RFC2462 section 5.4) | |
1568 | * - A tentative address is not considered | |
1569 | * "assigned to an interface" in the traditional | |
1570 | * sense, unless it is also flagged as optimistic. | |
1571 | * - Candidate Source Address (section 4) | |
1572 | * - In any case, anycast addresses, multicast | |
1573 | * addresses, and the unspecified address MUST | |
1574 | * NOT be included in a candidate set. | |
1575 | */ | |
1576 | if ((score->ifa->flags & IFA_F_TENTATIVE) && | |
1577 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) | |
1578 | continue; | |
1579 | ||
1580 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); | |
1581 | ||
1582 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || | |
1583 | score->addr_type & IPV6_ADDR_MULTICAST)) { | |
1584 | net_dbg_ratelimited("ADDRCONF: unspecified / multicast address assigned as unicast address on %s", | |
1585 | idev->dev->name); | |
1586 | continue; | |
1587 | } | |
1588 | ||
1589 | score->rule = -1; | |
1590 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); | |
1591 | ||
1592 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { | |
1593 | int minihiscore, miniscore; | |
1594 | ||
1595 | minihiscore = ipv6_get_saddr_eval(net, hiscore, dst, i); | |
1596 | miniscore = ipv6_get_saddr_eval(net, score, dst, i); | |
1597 | ||
1598 | if (minihiscore > miniscore) { | |
1599 | if (i == IPV6_SADDR_RULE_SCOPE && | |
1600 | score->scopedist > 0) { | |
1601 | /* | |
1602 | * special case: | |
1603 | * each remaining entry | |
1604 | * has too small (not enough) | |
1605 | * scope, because ifa entries | |
1606 | * are sorted by their scope | |
1607 | * values. | |
1608 | */ | |
1609 | goto out; | |
1610 | } | |
1611 | break; | |
1612 | } else if (minihiscore < miniscore) { | |
1613 | if (hiscore->ifa) | |
1614 | in6_ifa_put(hiscore->ifa); | |
1615 | ||
1616 | in6_ifa_hold(score->ifa); | |
1617 | ||
1618 | swap(hiscore, score); | |
c0b8da1e | 1619 | hiscore_idx = 1 - hiscore_idx; |
9131f3de YH |
1620 | |
1621 | /* restore our iterator */ | |
1622 | score->ifa = hiscore->ifa; | |
1623 | ||
1624 | break; | |
1625 | } | |
1626 | } | |
1627 | } | |
1628 | out: | |
1629 | read_unlock_bh(&idev->lock); | |
c0b8da1e | 1630 | return hiscore_idx; |
9131f3de YH |
1631 | } |
1632 | ||
afbac601 DA |
1633 | static int ipv6_get_saddr_master(struct net *net, |
1634 | const struct net_device *dst_dev, | |
1635 | const struct net_device *master, | |
1636 | struct ipv6_saddr_dst *dst, | |
1637 | struct ipv6_saddr_score *scores, | |
1638 | int hiscore_idx) | |
1639 | { | |
1640 | struct inet6_dev *idev; | |
1641 | ||
1642 | idev = __in6_dev_get(dst_dev); | |
1643 | if (idev) | |
1644 | hiscore_idx = __ipv6_dev_get_saddr(net, dst, idev, | |
1645 | scores, hiscore_idx); | |
1646 | ||
1647 | idev = __in6_dev_get(master); | |
1648 | if (idev) | |
1649 | hiscore_idx = __ipv6_dev_get_saddr(net, dst, idev, | |
1650 | scores, hiscore_idx); | |
1651 | ||
1652 | return hiscore_idx; | |
1653 | } | |
1654 | ||
b3f644fc | 1655 | int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev, |
9acd9f3a | 1656 | const struct in6_addr *daddr, unsigned int prefs, |
7cbca67c | 1657 | struct in6_addr *saddr) |
1da177e4 | 1658 | { |
c0b8da1e | 1659 | struct ipv6_saddr_score scores[2], *hiscore; |
a9b05723 | 1660 | struct ipv6_saddr_dst dst; |
9131f3de | 1661 | struct inet6_dev *idev; |
072047e4 | 1662 | struct net_device *dev; |
a9b05723 | 1663 | int dst_type; |
9131f3de | 1664 | bool use_oif_addr = false; |
c0b8da1e | 1665 | int hiscore_idx = 0; |
1da177e4 | 1666 | |
a9b05723 YH |
1667 | dst_type = __ipv6_addr_type(daddr); |
1668 | dst.addr = daddr; | |
1669 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; | |
1670 | dst.scope = __ipv6_addr_src_scope(dst_type); | |
3de23255 | 1671 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
7cbca67c | 1672 | dst.prefs = prefs; |
a9b05723 | 1673 | |
c0b8da1e YH |
1674 | scores[hiscore_idx].rule = -1; |
1675 | scores[hiscore_idx].ifa = NULL; | |
1da177e4 | 1676 | |
8814c4b5 | 1677 | rcu_read_lock(); |
1da177e4 | 1678 | |
9131f3de YH |
1679 | /* Candidate Source Address (section 4) |
1680 | * - multicast and link-local destination address, | |
1681 | * the set of candidate source address MUST only | |
1682 | * include addresses assigned to interfaces | |
1683 | * belonging to the same link as the outgoing | |
1684 | * interface. | |
1685 | * (- For site-local destination addresses, the | |
1686 | * set of candidate source addresses MUST only | |
1687 | * include addresses assigned to interfaces | |
1688 | * belonging to the same site as the outgoing | |
1689 | * interface.) | |
3985e8a3 EK |
1690 | * - "It is RECOMMENDED that the candidate source addresses |
1691 | * be the set of unicast addresses assigned to the | |
1692 | * interface that will be used to send to the destination | |
1693 | * (the 'outgoing' interface)." (RFC 6724) | |
9131f3de YH |
1694 | */ |
1695 | if (dst_dev) { | |
3985e8a3 | 1696 | idev = __in6_dev_get(dst_dev); |
9131f3de | 1697 | if ((dst_type & IPV6_ADDR_MULTICAST) || |
3985e8a3 EK |
1698 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL || |
1699 | (idev && idev->cnf.use_oif_addrs_only)) { | |
9131f3de YH |
1700 | use_oif_addr = true; |
1701 | } | |
1702 | } | |
a9b05723 | 1703 | |
9131f3de | 1704 | if (use_oif_addr) { |
c0b8da1e | 1705 | if (idev) |
c15df306 | 1706 | hiscore_idx = __ipv6_dev_get_saddr(net, &dst, idev, scores, hiscore_idx); |
9131f3de | 1707 | } else { |
afbac601 DA |
1708 | const struct net_device *master; |
1709 | int master_idx = 0; | |
1710 | ||
1711 | /* if dst_dev exists and is enslaved to an L3 device, then | |
1712 | * prefer addresses from dst_dev and then the master over | |
1713 | * any other enslaved devices in the L3 domain. | |
1714 | */ | |
1715 | master = l3mdev_master_dev_rcu(dst_dev); | |
1716 | if (master) { | |
1717 | master_idx = master->ifindex; | |
1718 | ||
1719 | hiscore_idx = ipv6_get_saddr_master(net, dst_dev, | |
1720 | master, &dst, | |
1721 | scores, hiscore_idx); | |
1722 | ||
1723 | if (scores[hiscore_idx].ifa) | |
1724 | goto out; | |
1725 | } | |
1726 | ||
9131f3de | 1727 | for_each_netdev_rcu(net, dev) { |
afbac601 DA |
1728 | /* only consider addresses on devices in the |
1729 | * same L3 domain | |
1730 | */ | |
1731 | if (l3mdev_master_ifindex_rcu(dev) != master_idx) | |
1732 | continue; | |
9131f3de YH |
1733 | idev = __in6_dev_get(dev); |
1734 | if (!idev) | |
072047e4 | 1735 | continue; |
c15df306 | 1736 | hiscore_idx = __ipv6_dev_get_saddr(net, &dst, idev, scores, hiscore_idx); |
1da177e4 LT |
1737 | } |
1738 | } | |
afbac601 DA |
1739 | |
1740 | out: | |
8814c4b5 | 1741 | rcu_read_unlock(); |
1da177e4 | 1742 | |
c0b8da1e | 1743 | hiscore = &scores[hiscore_idx]; |
a9b05723 | 1744 | if (!hiscore->ifa) |
072047e4 | 1745 | return -EADDRNOTAVAIL; |
1ab1457c | 1746 | |
4e3fd7a0 | 1747 | *saddr = hiscore->ifa->addr; |
a9b05723 | 1748 | in6_ifa_put(hiscore->ifa); |
072047e4 | 1749 | return 0; |
1da177e4 | 1750 | } |
5e5f3f0f | 1751 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
1da177e4 | 1752 | |
8965779d | 1753 | int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, |
479840ff | 1754 | u32 banned_flags) |
b7b1bfce HFS |
1755 | { |
1756 | struct inet6_ifaddr *ifp; | |
1757 | int err = -EADDRNOTAVAIL; | |
1758 | ||
602582ca HFS |
1759 | list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) { |
1760 | if (ifp->scope > IFA_LINK) | |
1761 | break; | |
b7b1bfce HFS |
1762 | if (ifp->scope == IFA_LINK && |
1763 | !(ifp->flags & banned_flags)) { | |
1764 | *addr = ifp->addr; | |
1765 | err = 0; | |
1766 | break; | |
1767 | } | |
1768 | } | |
1769 | return err; | |
1770 | } | |
1771 | ||
95c385b4 | 1772 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
479840ff | 1773 | u32 banned_flags) |
1da177e4 LT |
1774 | { |
1775 | struct inet6_dev *idev; | |
1776 | int err = -EADDRNOTAVAIL; | |
1777 | ||
8814c4b5 | 1778 | rcu_read_lock(); |
e21e8467 SH |
1779 | idev = __in6_dev_get(dev); |
1780 | if (idev) { | |
1da177e4 | 1781 | read_lock_bh(&idev->lock); |
b7b1bfce | 1782 | err = __ipv6_get_lladdr(idev, addr, banned_flags); |
1da177e4 LT |
1783 | read_unlock_bh(&idev->lock); |
1784 | } | |
8814c4b5 | 1785 | rcu_read_unlock(); |
1da177e4 LT |
1786 | return err; |
1787 | } | |
1788 | ||
1789 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1790 | { | |
1791 | int cnt = 0; | |
1792 | struct inet6_ifaddr *ifp; | |
1793 | ||
1794 | read_lock_bh(&idev->lock); | |
502a2ffd | 1795 | list_for_each_entry(ifp, &idev->addr_list, if_list) |
1da177e4 LT |
1796 | cnt++; |
1797 | read_unlock_bh(&idev->lock); | |
1798 | return cnt; | |
1799 | } | |
1800 | ||
b71d1d42 | 1801 | int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
2a7851bf | 1802 | const struct net_device *dev, int strict) |
c58da4c6 EK |
1803 | { |
1804 | return ipv6_chk_addr_and_flags(net, addr, dev, strict, IFA_F_TENTATIVE); | |
1805 | } | |
1806 | EXPORT_SYMBOL(ipv6_chk_addr); | |
1807 | ||
1808 | int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr, | |
1809 | const struct net_device *dev, int strict, | |
1810 | u32 banned_flags) | |
1da177e4 | 1811 | { |
eedf042a | 1812 | struct inet6_ifaddr *ifp; |
ddbe5032 | 1813 | unsigned int hash = inet6_addr_hash(addr); |
c58da4c6 | 1814 | u32 ifp_flags; |
1da177e4 | 1815 | |
5c578aed | 1816 | rcu_read_lock_bh(); |
b67bfe0d | 1817 | hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1818 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
bfeade08 | 1819 | continue; |
c58da4c6 EK |
1820 | /* Decouple optimistic from tentative for evaluation here. |
1821 | * Ban optimistic addresses explicitly, when required. | |
1822 | */ | |
1823 | ifp_flags = (ifp->flags&IFA_F_OPTIMISTIC) | |
1824 | ? (ifp->flags&~IFA_F_TENTATIVE) | |
1825 | : ifp->flags; | |
1da177e4 | 1826 | if (ipv6_addr_equal(&ifp->addr, addr) && |
c58da4c6 | 1827 | !(ifp_flags&banned_flags) && |
63159f29 | 1828 | (!dev || ifp->idev->dev == dev || |
eedf042a SH |
1829 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) { |
1830 | rcu_read_unlock_bh(); | |
1831 | return 1; | |
1da177e4 LT |
1832 | } |
1833 | } | |
5c578aed | 1834 | |
eedf042a SH |
1835 | rcu_read_unlock_bh(); |
1836 | return 0; | |
1da177e4 | 1837 | } |
c58da4c6 | 1838 | EXPORT_SYMBOL(ipv6_chk_addr_and_flags); |
7159039a | 1839 | |
3e81c6da DM |
1840 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
1841 | struct net_device *dev) | |
1da177e4 | 1842 | { |
ddbe5032 | 1843 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 1844 | struct inet6_ifaddr *ifp; |
1da177e4 | 1845 | |
b67bfe0d | 1846 | hlist_for_each_entry(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1847 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
06bfe655 | 1848 | continue; |
1da177e4 | 1849 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
63159f29 | 1850 | if (!dev || ifp->idev->dev == dev) |
3e81c6da | 1851 | return true; |
1da177e4 LT |
1852 | } |
1853 | } | |
3e81c6da | 1854 | return false; |
1da177e4 LT |
1855 | } |
1856 | ||
7df37ff3 CB |
1857 | /* Compares an address/prefix_len with addresses on device @dev. |
1858 | * If one is found it returns true. | |
1859 | */ | |
1860 | bool ipv6_chk_custom_prefix(const struct in6_addr *addr, | |
1861 | const unsigned int prefix_len, struct net_device *dev) | |
1862 | { | |
1863 | struct inet6_dev *idev; | |
1864 | struct inet6_ifaddr *ifa; | |
1865 | bool ret = false; | |
1866 | ||
1867 | rcu_read_lock(); | |
1868 | idev = __in6_dev_get(dev); | |
1869 | if (idev) { | |
1870 | read_lock_bh(&idev->lock); | |
1871 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
1872 | ret = ipv6_prefix_equal(addr, &ifa->addr, prefix_len); | |
1873 | if (ret) | |
1874 | break; | |
1875 | } | |
1876 | read_unlock_bh(&idev->lock); | |
1877 | } | |
1878 | rcu_read_unlock(); | |
1879 | ||
1880 | return ret; | |
1881 | } | |
1882 | EXPORT_SYMBOL(ipv6_chk_custom_prefix); | |
1883 | ||
b71d1d42 | 1884 | int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev) |
52eeeb84 YH |
1885 | { |
1886 | struct inet6_dev *idev; | |
1887 | struct inet6_ifaddr *ifa; | |
1888 | int onlink; | |
1889 | ||
1890 | onlink = 0; | |
1891 | rcu_read_lock(); | |
1892 | idev = __in6_dev_get(dev); | |
1893 | if (idev) { | |
1894 | read_lock_bh(&idev->lock); | |
502a2ffd | 1895 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
52eeeb84 YH |
1896 | onlink = ipv6_prefix_equal(addr, &ifa->addr, |
1897 | ifa->prefix_len); | |
1898 | if (onlink) | |
1899 | break; | |
1900 | } | |
1901 | read_unlock_bh(&idev->lock); | |
1902 | } | |
1903 | rcu_read_unlock(); | |
1904 | return onlink; | |
1905 | } | |
52eeeb84 YH |
1906 | EXPORT_SYMBOL(ipv6_chk_prefix); |
1907 | ||
9acd9f3a | 1908 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, |
1cab3da6 | 1909 | struct net_device *dev, int strict) |
1da177e4 | 1910 | { |
b79d1d54 | 1911 | struct inet6_ifaddr *ifp, *result = NULL; |
ddbe5032 | 1912 | unsigned int hash = inet6_addr_hash(addr); |
1da177e4 | 1913 | |
5c578aed | 1914 | rcu_read_lock_bh(); |
b67bfe0d | 1915 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1916 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
1cab3da6 | 1917 | continue; |
1da177e4 | 1918 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
63159f29 | 1919 | if (!dev || ifp->idev->dev == dev || |
1da177e4 | 1920 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { |
b79d1d54 | 1921 | result = ifp; |
1da177e4 LT |
1922 | in6_ifa_hold(ifp); |
1923 | break; | |
1924 | } | |
1925 | } | |
1926 | } | |
5c578aed | 1927 | rcu_read_unlock_bh(); |
1da177e4 | 1928 | |
b79d1d54 | 1929 | return result; |
1da177e4 LT |
1930 | } |
1931 | ||
1da177e4 LT |
1932 | /* Gets referenced address, destroys ifaddr */ |
1933 | ||
cc411d0b | 1934 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) |
1da177e4 | 1935 | { |
3d171f39 LR |
1936 | if (dad_failed) |
1937 | ifp->flags |= IFA_F_DADFAILED; | |
1938 | ||
ec8add2a | 1939 | if (ifp->flags&IFA_F_TEMPORARY) { |
1da177e4 LT |
1940 | struct inet6_ifaddr *ifpub; |
1941 | spin_lock_bh(&ifp->lock); | |
1942 | ifpub = ifp->ifpub; | |
1943 | if (ifpub) { | |
1944 | in6_ifa_hold(ifpub); | |
1945 | spin_unlock_bh(&ifp->lock); | |
1946 | ipv6_create_tempaddr(ifpub, ifp); | |
1947 | in6_ifa_put(ifpub); | |
1948 | } else { | |
1949 | spin_unlock_bh(&ifp->lock); | |
1950 | } | |
1951 | ipv6_del_addr(ifp); | |
ec8add2a SD |
1952 | } else if (ifp->flags&IFA_F_PERMANENT || !dad_failed) { |
1953 | spin_lock_bh(&ifp->lock); | |
1954 | addrconf_del_dad_work(ifp); | |
1955 | ifp->flags |= IFA_F_TENTATIVE; | |
1956 | spin_unlock_bh(&ifp->lock); | |
1957 | if (dad_failed) | |
1958 | ipv6_ifa_notify(0, ifp); | |
1959 | in6_ifa_put(ifp); | |
c15b1cca | 1960 | } else { |
1da177e4 | 1961 | ipv6_del_addr(ifp); |
c15b1cca | 1962 | } |
1da177e4 LT |
1963 | } |
1964 | ||
f2344a13 HX |
1965 | static int addrconf_dad_end(struct inet6_ifaddr *ifp) |
1966 | { | |
1967 | int err = -ENOENT; | |
1968 | ||
8e8e676d | 1969 | spin_lock_bh(&ifp->lock); |
f2344a13 HX |
1970 | if (ifp->state == INET6_IFADDR_STATE_DAD) { |
1971 | ifp->state = INET6_IFADDR_STATE_POSTDAD; | |
1972 | err = 0; | |
1973 | } | |
8e8e676d | 1974 | spin_unlock_bh(&ifp->lock); |
f2344a13 HX |
1975 | |
1976 | return err; | |
1977 | } | |
1978 | ||
3c21edbd YH |
1979 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1980 | { | |
1b34be74 | 1981 | struct inet6_dev *idev = ifp->idev; |
1855b7c3 | 1982 | struct net *net = dev_net(ifp->idev->dev); |
9bdd8d40 | 1983 | |
853dc2e0 UB |
1984 | if (addrconf_dad_end(ifp)) { |
1985 | in6_ifa_put(ifp); | |
f2344a13 | 1986 | return; |
853dc2e0 | 1987 | } |
f2344a13 | 1988 | |
e87cc472 JP |
1989 | net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n", |
1990 | ifp->idev->dev->name, &ifp->addr); | |
9bdd8d40 | 1991 | |
5f40ef77 HFS |
1992 | spin_lock_bh(&ifp->lock); |
1993 | ||
1994 | if (ifp->flags & IFA_F_STABLE_PRIVACY) { | |
1995 | int scope = ifp->scope; | |
1996 | u32 flags = ifp->flags; | |
1997 | struct in6_addr new_addr; | |
1998 | struct inet6_ifaddr *ifp2; | |
1999 | u32 valid_lft, preferred_lft; | |
2000 | int pfxlen = ifp->prefix_len; | |
5f40ef77 HFS |
2001 | int retries = ifp->stable_privacy_retry + 1; |
2002 | ||
1855b7c3 | 2003 | if (retries > net->ipv6.sysctl.idgen_retries) { |
5f40ef77 HFS |
2004 | net_info_ratelimited("%s: privacy stable address generation failed because of DAD conflicts!\n", |
2005 | ifp->idev->dev->name); | |
2006 | goto errdad; | |
2007 | } | |
2008 | ||
2009 | new_addr = ifp->addr; | |
2010 | if (ipv6_generate_stable_address(&new_addr, retries, | |
2011 | idev)) | |
2012 | goto errdad; | |
2013 | ||
2014 | valid_lft = ifp->valid_lft; | |
2015 | preferred_lft = ifp->prefered_lft; | |
2016 | ||
2017 | spin_unlock_bh(&ifp->lock); | |
1b34be74 | 2018 | |
5f40ef77 HFS |
2019 | if (idev->cnf.max_addresses && |
2020 | ipv6_count_addresses(idev) >= | |
2021 | idev->cnf.max_addresses) | |
2022 | goto lock_errdad; | |
2023 | ||
2024 | net_info_ratelimited("%s: generating new stable privacy address because of DAD conflict\n", | |
2025 | ifp->idev->dev->name); | |
2026 | ||
2027 | ifp2 = ipv6_add_addr(idev, &new_addr, NULL, pfxlen, | |
2028 | scope, flags, valid_lft, | |
2029 | preferred_lft); | |
2030 | if (IS_ERR(ifp2)) | |
2031 | goto lock_errdad; | |
2032 | ||
2033 | spin_lock_bh(&ifp2->lock); | |
2034 | ifp2->stable_privacy_retry = retries; | |
2035 | ifp2->state = INET6_IFADDR_STATE_PREDAD; | |
2036 | spin_unlock_bh(&ifp2->lock); | |
2037 | ||
1855b7c3 | 2038 | addrconf_mod_dad_work(ifp2, net->ipv6.sysctl.idgen_delay); |
5f40ef77 HFS |
2039 | in6_ifa_put(ifp2); |
2040 | lock_errdad: | |
2041 | spin_lock_bh(&ifp->lock); | |
1b34be74 YH |
2042 | } |
2043 | ||
5f40ef77 | 2044 | errdad: |
c15b1cca HFS |
2045 | /* transition from _POSTDAD to _ERRDAD */ |
2046 | ifp->state = INET6_IFADDR_STATE_ERRDAD; | |
8e8e676d | 2047 | spin_unlock_bh(&ifp->lock); |
c15b1cca HFS |
2048 | |
2049 | addrconf_mod_dad_work(ifp, 0); | |
751eb6b6 | 2050 | in6_ifa_put(ifp); |
3c21edbd | 2051 | } |
1da177e4 | 2052 | |
a9ed4a29 SD |
2053 | /* Join to solicited addr multicast group. |
2054 | * caller must hold RTNL */ | |
b71d1d42 | 2055 | void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 LT |
2056 | { |
2057 | struct in6_addr maddr; | |
2058 | ||
2059 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
2060 | return; | |
2061 | ||
2062 | addrconf_addr_solict_mult(addr, &maddr); | |
2063 | ipv6_dev_mc_inc(dev, &maddr); | |
2064 | } | |
2065 | ||
a9ed4a29 | 2066 | /* caller must hold RTNL */ |
b71d1d42 | 2067 | void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
2068 | { |
2069 | struct in6_addr maddr; | |
2070 | ||
2071 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
2072 | return; | |
2073 | ||
2074 | addrconf_addr_solict_mult(addr, &maddr); | |
2075 | __ipv6_dev_mc_dec(idev, &maddr); | |
2076 | } | |
2077 | ||
a9ed4a29 | 2078 | /* caller must hold RTNL */ |
20380731 | 2079 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
2080 | { |
2081 | struct in6_addr addr; | |
c15b1cca | 2082 | |
88ad3149 | 2083 | if (ifp->prefix_len >= 127) /* RFC 6164 */ |
2bda8a0c | 2084 | return; |
1da177e4 LT |
2085 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
2086 | if (ipv6_addr_any(&addr)) | |
2087 | return; | |
013b4d90 | 2088 | __ipv6_dev_ac_inc(ifp->idev, &addr); |
1da177e4 LT |
2089 | } |
2090 | ||
a9ed4a29 | 2091 | /* caller must hold RTNL */ |
20380731 | 2092 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
2093 | { |
2094 | struct in6_addr addr; | |
c15b1cca | 2095 | |
88ad3149 | 2096 | if (ifp->prefix_len >= 127) /* RFC 6164 */ |
32019e65 | 2097 | return; |
1da177e4 LT |
2098 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
2099 | if (ipv6_addr_any(&addr)) | |
2100 | return; | |
2101 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
2102 | } | |
2103 | ||
8a7a4b47 | 2104 | static int addrconf_ifid_6lowpan(u8 *eui, struct net_device *dev) |
06a4c1c5 | 2105 | { |
8a7a4b47 AA |
2106 | switch (dev->addr_len) { |
2107 | case ETH_ALEN: | |
9dae2e03 LAD |
2108 | memcpy(eui, dev->dev_addr, 3); |
2109 | eui[3] = 0xFF; | |
2110 | eui[4] = 0xFE; | |
2111 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
2112 | break; | |
8a7a4b47 AA |
2113 | case EUI64_ADDR_LEN: |
2114 | memcpy(eui, dev->dev_addr, EUI64_ADDR_LEN); | |
2115 | eui[0] ^= 2; | |
2116 | break; | |
2117 | default: | |
06a4c1c5 | 2118 | return -1; |
8a7a4b47 AA |
2119 | } |
2120 | ||
06a4c1c5 | 2121 | return 0; |
2122 | } | |
2123 | ||
cb6bf355 YH |
2124 | static int addrconf_ifid_ieee1394(u8 *eui, struct net_device *dev) |
2125 | { | |
2126 | union fwnet_hwaddr *ha; | |
2127 | ||
2128 | if (dev->addr_len != FWNET_ALEN) | |
2129 | return -1; | |
2130 | ||
2131 | ha = (union fwnet_hwaddr *)dev->dev_addr; | |
2132 | ||
2133 | memcpy(eui, &ha->uc.uniq_id, sizeof(ha->uc.uniq_id)); | |
2134 | eui[0] ^= 2; | |
2135 | return 0; | |
2136 | } | |
2137 | ||
073a8e0e YH |
2138 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) |
2139 | { | |
2140 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
2141 | if (dev->addr_len != ARCNET_ALEN) | |
2142 | return -1; | |
2143 | memset(eui, 0, 7); | |
8e5e8f30 | 2144 | eui[7] = *(u8 *)dev->dev_addr; |
073a8e0e YH |
2145 | return 0; |
2146 | } | |
2147 | ||
2148 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
2149 | { | |
2150 | if (dev->addr_len != INFINIBAND_ALEN) | |
2151 | return -1; | |
2152 | memcpy(eui, dev->dev_addr + 12, 8); | |
2153 | eui[0] |= 2; | |
2154 | return 0; | |
2155 | } | |
2156 | ||
c61393ea | 2157 | static int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
dfd982ba | 2158 | { |
9af28511 SH |
2159 | if (addr == 0) |
2160 | return -1; | |
dfd982ba YH |
2161 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || |
2162 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || | |
2163 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || | |
2164 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || | |
2165 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || | |
2166 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; | |
2167 | eui[1] = 0; | |
2168 | eui[2] = 0x5E; | |
2169 | eui[3] = 0xFE; | |
2170 | memcpy(eui + 4, &addr, 4); | |
2171 | return 0; | |
2172 | } | |
dfd982ba YH |
2173 | |
2174 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) | |
2175 | { | |
2176 | if (dev->priv_flags & IFF_ISATAP) | |
2177 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
2178 | return -1; | |
2179 | } | |
2180 | ||
aee80b54 | 2181 | static int addrconf_ifid_gre(u8 *eui, struct net_device *dev) |
2182 | { | |
2183 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
2184 | } | |
2185 | ||
e837735e ND |
2186 | static int addrconf_ifid_ip6tnl(u8 *eui, struct net_device *dev) |
2187 | { | |
2188 | memcpy(eui, dev->perm_addr, 3); | |
2189 | memcpy(eui + 5, dev->perm_addr + 3, 3); | |
2190 | eui[3] = 0xFF; | |
2191 | eui[4] = 0xFE; | |
2192 | eui[0] ^= 2; | |
2193 | return 0; | |
2194 | } | |
2195 | ||
1da177e4 LT |
2196 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
2197 | { | |
2198 | switch (dev->type) { | |
2199 | case ARPHRD_ETHER: | |
2200 | case ARPHRD_FDDI: | |
073a8e0e | 2201 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 2202 | case ARPHRD_ARCNET: |
073a8e0e | 2203 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 2204 | case ARPHRD_INFINIBAND: |
073a8e0e | 2205 | return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0 | 2206 | case ARPHRD_SIT: |
dfd982ba | 2207 | return addrconf_ifid_sit(eui, dev); |
aee80b54 | 2208 | case ARPHRD_IPGRE: |
45ce0fd1 | 2209 | case ARPHRD_TUNNEL: |
aee80b54 | 2210 | return addrconf_ifid_gre(eui, dev); |
e74bccb8 | 2211 | case ARPHRD_6LOWPAN: |
8a7a4b47 | 2212 | return addrconf_ifid_6lowpan(eui, dev); |
cb6bf355 YH |
2213 | case ARPHRD_IEEE1394: |
2214 | return addrconf_ifid_ieee1394(eui, dev); | |
e837735e | 2215 | case ARPHRD_TUNNEL6: |
45ce0fd1 | 2216 | case ARPHRD_IP6GRE: |
e837735e | 2217 | return addrconf_ifid_ip6tnl(eui, dev); |
1da177e4 LT |
2218 | } |
2219 | return -1; | |
2220 | } | |
2221 | ||
2222 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
2223 | { | |
2224 | int err = -1; | |
2225 | struct inet6_ifaddr *ifp; | |
2226 | ||
2227 | read_lock_bh(&idev->lock); | |
602582ca HFS |
2228 | list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) { |
2229 | if (ifp->scope > IFA_LINK) | |
2230 | break; | |
1da177e4 LT |
2231 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { |
2232 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
2233 | err = 0; | |
2234 | break; | |
2235 | } | |
2236 | } | |
2237 | read_unlock_bh(&idev->lock); | |
2238 | return err; | |
2239 | } | |
2240 | ||
1da177e4 | 2241 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ |
9d6280da | 2242 | static void ipv6_regen_rndid(struct inet6_dev *idev) |
1da177e4 | 2243 | { |
1da177e4 | 2244 | regen: |
955189ef | 2245 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 2246 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
2247 | |
2248 | /* | |
2249 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
2250 | * check if generated address is not inappropriate | |
2251 | * | |
2252 | * - Reserved subnet anycast (RFC 2526) | |
2253 | * 11111101 11....11 1xxxxxxx | |
c7dc89c0 | 2254 | * - ISATAP (RFC4214) 6.1 |
1da177e4 LT |
2255 | * 00-00-5E-FE-xx-xx-xx-xx |
2256 | * - value 0 | |
2257 | * - XXX: already assigned to an address on the device | |
2258 | */ | |
1ab1457c | 2259 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
2260 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
2261 | (idev->rndid[7]&0x80)) | |
2262 | goto regen; | |
2263 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
2264 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
2265 | goto regen; | |
2266 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
2267 | goto regen; | |
2268 | } | |
1da177e4 LT |
2269 | } |
2270 | ||
9d6280da | 2271 | static void ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) |
8e5e8f30 | 2272 | { |
1da177e4 | 2273 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) |
9d6280da | 2274 | ipv6_regen_rndid(idev); |
1da177e4 | 2275 | } |
1da177e4 LT |
2276 | |
2277 | /* | |
2278 | * Add prefix route. | |
2279 | */ | |
2280 | ||
2281 | static void | |
2282 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 2283 | unsigned long expires, u32 flags) |
1da177e4 | 2284 | { |
86872cb5 | 2285 | struct fib6_config cfg = { |
ca254490 | 2286 | .fc_table = l3mdev_fib_table(dev) ? : RT6_TABLE_PREFIX, |
86872cb5 TG |
2287 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
2288 | .fc_ifindex = dev->ifindex, | |
2289 | .fc_expires = expires, | |
2290 | .fc_dst_len = plen, | |
2291 | .fc_flags = RTF_UP | flags, | |
c346dca1 | 2292 | .fc_nlinfo.nl_net = dev_net(dev), |
f410a1fb | 2293 | .fc_protocol = RTPROT_KERNEL, |
86872cb5 | 2294 | }; |
1da177e4 | 2295 | |
4e3fd7a0 | 2296 | cfg.fc_dst = *pfx; |
1da177e4 LT |
2297 | |
2298 | /* Prevent useless cloning on PtP SIT. | |
2299 | This thing is done here expecting that the whole | |
2300 | class of non-broadcast devices need not cloning. | |
2301 | */ | |
07a93626 | 2302 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
86872cb5 TG |
2303 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
2304 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 2305 | #endif |
1da177e4 | 2306 | |
333c4301 | 2307 | ip6_route_add(&cfg, NULL); |
1da177e4 LT |
2308 | } |
2309 | ||
14ef37b6 AH |
2310 | |
2311 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, | |
2312 | int plen, | |
2313 | const struct net_device *dev, | |
2314 | u32 flags, u32 noflags) | |
2315 | { | |
2316 | struct fib6_node *fn; | |
2317 | struct rt6_info *rt = NULL; | |
2318 | struct fib6_table *table; | |
ca254490 | 2319 | u32 tb_id = l3mdev_fib_table(dev) ? : RT6_TABLE_PREFIX; |
14ef37b6 | 2320 | |
ca254490 | 2321 | table = fib6_get_table(dev_net(dev), tb_id); |
63159f29 | 2322 | if (!table) |
14ef37b6 AH |
2323 | return NULL; |
2324 | ||
5744dd9b | 2325 | read_lock_bh(&table->tb6_lock); |
14ef37b6 AH |
2326 | fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0); |
2327 | if (!fn) | |
2328 | goto out; | |
1f56a01f MKL |
2329 | |
2330 | noflags |= RTF_CACHE; | |
14ef37b6 | 2331 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { |
d1918542 | 2332 | if (rt->dst.dev->ifindex != dev->ifindex) |
14ef37b6 AH |
2333 | continue; |
2334 | if ((rt->rt6i_flags & flags) != flags) | |
2335 | continue; | |
85da53bf | 2336 | if ((rt->rt6i_flags & noflags) != 0) |
14ef37b6 AH |
2337 | continue; |
2338 | dst_hold(&rt->dst); | |
2339 | break; | |
2340 | } | |
2341 | out: | |
5744dd9b | 2342 | read_unlock_bh(&table->tb6_lock); |
14ef37b6 AH |
2343 | return rt; |
2344 | } | |
2345 | ||
2346 | ||
1da177e4 LT |
2347 | /* Create "default" multicast route to the interface */ |
2348 | ||
2349 | static void addrconf_add_mroute(struct net_device *dev) | |
2350 | { | |
86872cb5 | 2351 | struct fib6_config cfg = { |
ca254490 | 2352 | .fc_table = l3mdev_fib_table(dev) ? : RT6_TABLE_LOCAL, |
86872cb5 TG |
2353 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
2354 | .fc_ifindex = dev->ifindex, | |
2355 | .fc_dst_len = 8, | |
2356 | .fc_flags = RTF_UP, | |
c346dca1 | 2357 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 TG |
2358 | }; |
2359 | ||
2360 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
2361 | ||
333c4301 | 2362 | ip6_route_add(&cfg, NULL); |
1da177e4 LT |
2363 | } |
2364 | ||
1da177e4 LT |
2365 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) |
2366 | { | |
2367 | struct inet6_dev *idev; | |
2368 | ||
2369 | ASSERT_RTNL(); | |
2370 | ||
e21e8467 SH |
2371 | idev = ipv6_find_idev(dev); |
2372 | if (!idev) | |
64e724f6 BH |
2373 | return ERR_PTR(-ENOBUFS); |
2374 | ||
2375 | if (idev->cnf.disable_ipv6) | |
2376 | return ERR_PTR(-EACCES); | |
1da177e4 LT |
2377 | |
2378 | /* Add default multicast route */ | |
ba46ee4c | 2379 | if (!(dev->flags & IFF_LOOPBACK) && !netif_is_l3_master(dev)) |
4af04aba | 2380 | addrconf_add_mroute(dev); |
1da177e4 | 2381 | |
1da177e4 LT |
2382 | return idev; |
2383 | } | |
2384 | ||
53bd6749 JP |
2385 | static void manage_tempaddrs(struct inet6_dev *idev, |
2386 | struct inet6_ifaddr *ifp, | |
2387 | __u32 valid_lft, __u32 prefered_lft, | |
2388 | bool create, unsigned long now) | |
2389 | { | |
2390 | u32 flags; | |
2391 | struct inet6_ifaddr *ift; | |
2392 | ||
2393 | read_lock_bh(&idev->lock); | |
2394 | /* update all temporary addresses in the list */ | |
2395 | list_for_each_entry(ift, &idev->tempaddr_list, tmp_list) { | |
2396 | int age, max_valid, max_prefered; | |
2397 | ||
2398 | if (ifp != ift->ifpub) | |
2399 | continue; | |
2400 | ||
2401 | /* RFC 4941 section 3.3: | |
2402 | * If a received option will extend the lifetime of a public | |
2403 | * address, the lifetimes of temporary addresses should | |
2404 | * be extended, subject to the overall constraint that no | |
2405 | * temporary addresses should ever remain "valid" or "preferred" | |
2406 | * for a time longer than (TEMP_VALID_LIFETIME) or | |
2407 | * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), respectively. | |
2408 | */ | |
2409 | age = (now - ift->cstamp) / HZ; | |
2410 | max_valid = idev->cnf.temp_valid_lft - age; | |
2411 | if (max_valid < 0) | |
2412 | max_valid = 0; | |
2413 | ||
2414 | max_prefered = idev->cnf.temp_prefered_lft - | |
76506a98 | 2415 | idev->desync_factor - age; |
53bd6749 JP |
2416 | if (max_prefered < 0) |
2417 | max_prefered = 0; | |
2418 | ||
2419 | if (valid_lft > max_valid) | |
2420 | valid_lft = max_valid; | |
2421 | ||
2422 | if (prefered_lft > max_prefered) | |
2423 | prefered_lft = max_prefered; | |
2424 | ||
2425 | spin_lock(&ift->lock); | |
2426 | flags = ift->flags; | |
2427 | ift->valid_lft = valid_lft; | |
2428 | ift->prefered_lft = prefered_lft; | |
2429 | ift->tstamp = now; | |
2430 | if (prefered_lft > 0) | |
2431 | ift->flags &= ~IFA_F_DEPRECATED; | |
2432 | ||
2433 | spin_unlock(&ift->lock); | |
2434 | if (!(flags&IFA_F_TENTATIVE)) | |
2435 | ipv6_ifa_notify(0, ift); | |
2436 | } | |
2437 | ||
2438 | if ((create || list_empty(&idev->tempaddr_list)) && | |
2439 | idev->cnf.use_tempaddr > 0) { | |
2440 | /* When a new public address is created as described | |
2441 | * in [ADDRCONF], also create a new temporary address. | |
2442 | * Also create a temporary address if it's enabled but | |
2443 | * no temporary address currently exists. | |
2444 | */ | |
2445 | read_unlock_bh(&idev->lock); | |
2446 | ipv6_create_tempaddr(ifp, NULL); | |
2447 | } else { | |
2448 | read_unlock_bh(&idev->lock); | |
2449 | } | |
2450 | } | |
2451 | ||
cc9da6cc BM |
2452 | static bool is_addr_mode_generate_stable(struct inet6_dev *idev) |
2453 | { | |
d35a00b8 FJ |
2454 | return idev->cnf.addr_gen_mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY || |
2455 | idev->cnf.addr_gen_mode == IN6_ADDR_GEN_MODE_RANDOM; | |
cc9da6cc BM |
2456 | } |
2457 | ||
cc84b3c6 AA |
2458 | int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev, |
2459 | const struct prefix_info *pinfo, | |
2460 | struct inet6_dev *in6_dev, | |
2461 | const struct in6_addr *addr, int addr_type, | |
2462 | u32 addr_flags, bool sllao, bool tokenized, | |
2463 | __u32 valid_lft, u32 prefered_lft) | |
4f672235 AA |
2464 | { |
2465 | struct inet6_ifaddr *ifp = ipv6_get_ifaddr(net, addr, dev, 1); | |
2466 | int create = 0, update_lft = 0; | |
2467 | ||
2468 | if (!ifp && valid_lft) { | |
2469 | int max_addresses = in6_dev->cnf.max_addresses; | |
2470 | ||
2471 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
35e015e1 MC |
2472 | if ((net->ipv6.devconf_all->optimistic_dad || |
2473 | in6_dev->cnf.optimistic_dad) && | |
4f672235 AA |
2474 | !net->ipv6.devconf_all->forwarding && sllao) |
2475 | addr_flags |= IFA_F_OPTIMISTIC; | |
2476 | #endif | |
2477 | ||
2478 | /* Do not allow to create too much of autoconfigured | |
2479 | * addresses; this would be too easy way to crash kernel. | |
2480 | */ | |
2481 | if (!max_addresses || | |
2482 | ipv6_count_addresses(in6_dev) < max_addresses) | |
2483 | ifp = ipv6_add_addr(in6_dev, addr, NULL, | |
2484 | pinfo->prefix_len, | |
2485 | addr_type&IPV6_ADDR_SCOPE_MASK, | |
2486 | addr_flags, valid_lft, | |
2487 | prefered_lft); | |
2488 | ||
2489 | if (IS_ERR_OR_NULL(ifp)) | |
2490 | return -1; | |
2491 | ||
2492 | update_lft = 0; | |
2493 | create = 1; | |
2494 | spin_lock_bh(&ifp->lock); | |
2495 | ifp->flags |= IFA_F_MANAGETEMPADDR; | |
2496 | ifp->cstamp = jiffies; | |
2497 | ifp->tokenized = tokenized; | |
2498 | spin_unlock_bh(&ifp->lock); | |
2499 | addrconf_dad_start(ifp); | |
2500 | } | |
2501 | ||
2502 | if (ifp) { | |
2503 | u32 flags; | |
2504 | unsigned long now; | |
2505 | u32 stored_lft; | |
2506 | ||
2507 | /* update lifetime (RFC2462 5.5.3 e) */ | |
2508 | spin_lock_bh(&ifp->lock); | |
2509 | now = jiffies; | |
2510 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
2511 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
2512 | else | |
2513 | stored_lft = 0; | |
2514 | if (!update_lft && !create && stored_lft) { | |
2515 | const u32 minimum_lft = min_t(u32, | |
2516 | stored_lft, MIN_VALID_LIFETIME); | |
2517 | valid_lft = max(valid_lft, minimum_lft); | |
2518 | ||
2519 | /* RFC4862 Section 5.5.3e: | |
2520 | * "Note that the preferred lifetime of the | |
2521 | * corresponding address is always reset to | |
2522 | * the Preferred Lifetime in the received | |
2523 | * Prefix Information option, regardless of | |
2524 | * whether the valid lifetime is also reset or | |
2525 | * ignored." | |
2526 | * | |
2527 | * So we should always update prefered_lft here. | |
2528 | */ | |
2529 | update_lft = 1; | |
2530 | } | |
2531 | ||
2532 | if (update_lft) { | |
2533 | ifp->valid_lft = valid_lft; | |
2534 | ifp->prefered_lft = prefered_lft; | |
2535 | ifp->tstamp = now; | |
2536 | flags = ifp->flags; | |
2537 | ifp->flags &= ~IFA_F_DEPRECATED; | |
2538 | spin_unlock_bh(&ifp->lock); | |
2539 | ||
2540 | if (!(flags&IFA_F_TENTATIVE)) | |
2541 | ipv6_ifa_notify(0, ifp); | |
2542 | } else | |
2543 | spin_unlock_bh(&ifp->lock); | |
2544 | ||
2545 | manage_tempaddrs(in6_dev, ifp, valid_lft, prefered_lft, | |
2546 | create, now); | |
2547 | ||
2548 | in6_ifa_put(ifp); | |
2549 | addrconf_verify(); | |
2550 | } | |
2551 | ||
2552 | return 0; | |
2553 | } | |
cc84b3c6 | 2554 | EXPORT_SYMBOL_GPL(addrconf_prefix_rcv_add_addr); |
4f672235 | 2555 | |
e6bff995 | 2556 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao) |
1da177e4 LT |
2557 | { |
2558 | struct prefix_info *pinfo; | |
2559 | __u32 valid_lft; | |
2560 | __u32 prefered_lft; | |
4f672235 | 2561 | int addr_type, err; |
64236f3f | 2562 | u32 addr_flags = 0; |
1da177e4 | 2563 | struct inet6_dev *in6_dev; |
56d417b1 | 2564 | struct net *net = dev_net(dev); |
1da177e4 LT |
2565 | |
2566 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 2567 | |
1da177e4 | 2568 | if (len < sizeof(struct prefix_info)) { |
ba3542e1 | 2569 | ADBG("addrconf: prefix option too short\n"); |
1da177e4 LT |
2570 | return; |
2571 | } | |
1ab1457c | 2572 | |
1da177e4 LT |
2573 | /* |
2574 | * Validation checks ([ADDRCONF], page 19) | |
2575 | */ | |
2576 | ||
2577 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
2578 | ||
2579 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
2580 | return; | |
2581 | ||
2582 | valid_lft = ntohl(pinfo->valid); | |
2583 | prefered_lft = ntohl(pinfo->prefered); | |
2584 | ||
2585 | if (prefered_lft > valid_lft) { | |
e87cc472 | 2586 | net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n"); |
1da177e4 LT |
2587 | return; |
2588 | } | |
2589 | ||
2590 | in6_dev = in6_dev_get(dev); | |
2591 | ||
63159f29 | 2592 | if (!in6_dev) { |
e87cc472 JP |
2593 | net_dbg_ratelimited("addrconf: device %s not configured\n", |
2594 | dev->name); | |
1da177e4 LT |
2595 | return; |
2596 | } | |
2597 | ||
2598 | /* | |
2599 | * Two things going on here: | |
2600 | * 1) Add routes for on-link prefixes | |
2601 | * 2) Configure prefixes with the auto flag set | |
2602 | */ | |
2603 | ||
4bed72e4 YH |
2604 | if (pinfo->onlink) { |
2605 | struct rt6_info *rt; | |
2606 | unsigned long rt_expires; | |
2607 | ||
6f704992 YH |
2608 | /* Avoid arithmetic overflow. Really, we could |
2609 | * save rt_expires in seconds, likely valid_lft, | |
2610 | * but it would require division in fib gc, that it | |
2611 | * not good. | |
2612 | */ | |
4bed72e4 YH |
2613 | if (HZ > USER_HZ) |
2614 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); | |
2615 | else | |
2616 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); | |
3dd4bc68 | 2617 | |
4bed72e4 YH |
2618 | if (addrconf_finite_timeout(rt_expires)) |
2619 | rt_expires *= HZ; | |
1da177e4 | 2620 | |
14ef37b6 AH |
2621 | rt = addrconf_get_prefix_route(&pinfo->prefix, |
2622 | pinfo->prefix_len, | |
2623 | dev, | |
2624 | RTF_ADDRCONF | RTF_PREFIX_RT, | |
2625 | RTF_GATEWAY | RTF_DEFAULT); | |
1da177e4 | 2626 | |
14ef37b6 | 2627 | if (rt) { |
6f704992 YH |
2628 | /* Autoconf prefix route */ |
2629 | if (valid_lft == 0) { | |
2630 | ip6_del_rt(rt); | |
2631 | rt = NULL; | |
4bed72e4 | 2632 | } else if (addrconf_finite_timeout(rt_expires)) { |
6f704992 | 2633 | /* not infinity */ |
1716a961 | 2634 | rt6_set_expires(rt, jiffies + rt_expires); |
6f704992 | 2635 | } else { |
1716a961 | 2636 | rt6_clean_expires(rt); |
1da177e4 LT |
2637 | } |
2638 | } else if (valid_lft) { | |
6f704992 | 2639 | clock_t expires = 0; |
4bed72e4 YH |
2640 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
2641 | if (addrconf_finite_timeout(rt_expires)) { | |
6f704992 YH |
2642 | /* not infinity */ |
2643 | flags |= RTF_EXPIRES; | |
2644 | expires = jiffies_to_clock_t(rt_expires); | |
2645 | } | |
1da177e4 | 2646 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
6f704992 | 2647 | dev, expires, flags); |
1da177e4 | 2648 | } |
94e187c0 | 2649 | ip6_rt_put(rt); |
1da177e4 LT |
2650 | } |
2651 | ||
2652 | /* Try to figure out our local address for this prefix */ | |
2653 | ||
2654 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
1da177e4 | 2655 | struct in6_addr addr; |
f997c55c | 2656 | bool tokenized = false, dev_addr_generated = false; |
1da177e4 LT |
2657 | |
2658 | if (pinfo->prefix_len == 64) { | |
2659 | memcpy(&addr, &pinfo->prefix, 8); | |
f53adae4 DB |
2660 | |
2661 | if (!ipv6_addr_any(&in6_dev->token)) { | |
2662 | read_lock_bh(&in6_dev->lock); | |
2663 | memcpy(addr.s6_addr + 8, | |
2664 | in6_dev->token.s6_addr + 8, 8); | |
2665 | read_unlock_bh(&in6_dev->lock); | |
617fe29d | 2666 | tokenized = true; |
cc9da6cc | 2667 | } else if (is_addr_mode_generate_stable(in6_dev) && |
622c81d5 HFS |
2668 | !ipv6_generate_stable_address(&addr, 0, |
2669 | in6_dev)) { | |
64236f3f | 2670 | addr_flags |= IFA_F_STABLE_PRIVACY; |
622c81d5 | 2671 | goto ok; |
f53adae4 DB |
2672 | } else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && |
2673 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
4f672235 | 2674 | goto put; |
f997c55c AA |
2675 | } else { |
2676 | dev_addr_generated = true; | |
1da177e4 LT |
2677 | } |
2678 | goto ok; | |
2679 | } | |
e87cc472 JP |
2680 | net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n", |
2681 | pinfo->prefix_len); | |
4f672235 | 2682 | goto put; |
1da177e4 LT |
2683 | |
2684 | ok: | |
4f672235 AA |
2685 | err = addrconf_prefix_rcv_add_addr(net, dev, pinfo, in6_dev, |
2686 | &addr, addr_type, | |
2687 | addr_flags, sllao, | |
2688 | tokenized, valid_lft, | |
2689 | prefered_lft); | |
2690 | if (err) | |
2691 | goto put; | |
f997c55c AA |
2692 | |
2693 | /* Ignore error case here because previous prefix add addr was | |
2694 | * successful which will be notified. | |
2695 | */ | |
2696 | ndisc_ops_prefix_rcv_add_addr(net, dev, pinfo, in6_dev, &addr, | |
2697 | addr_type, addr_flags, sllao, | |
2698 | tokenized, valid_lft, | |
2699 | prefered_lft, | |
2700 | dev_addr_generated); | |
1da177e4 LT |
2701 | } |
2702 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
4f672235 | 2703 | put: |
1da177e4 LT |
2704 | in6_dev_put(in6_dev); |
2705 | } | |
2706 | ||
2707 | /* | |
2708 | * Set destination address. | |
2709 | * Special case for SIT interfaces where we create a new "virtual" | |
2710 | * device. | |
2711 | */ | |
af284937 | 2712 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2713 | { |
2714 | struct in6_ifreq ireq; | |
2715 | struct net_device *dev; | |
2716 | int err = -EINVAL; | |
2717 | ||
2718 | rtnl_lock(); | |
2719 | ||
2720 | err = -EFAULT; | |
2721 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2722 | goto err_exit; | |
2723 | ||
af284937 | 2724 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
1da177e4 LT |
2725 | |
2726 | err = -ENODEV; | |
63159f29 | 2727 | if (!dev) |
1da177e4 LT |
2728 | goto err_exit; |
2729 | ||
07a93626 | 2730 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 | 2731 | if (dev->type == ARPHRD_SIT) { |
5bc3eb7e | 2732 | const struct net_device_ops *ops = dev->netdev_ops; |
1da177e4 | 2733 | struct ifreq ifr; |
1da177e4 LT |
2734 | struct ip_tunnel_parm p; |
2735 | ||
2736 | err = -EADDRNOTAVAIL; | |
2737 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
2738 | goto err_exit; | |
2739 | ||
2740 | memset(&p, 0, sizeof(p)); | |
2741 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
2742 | p.iph.saddr = 0; | |
2743 | p.iph.version = 4; | |
2744 | p.iph.ihl = 5; | |
2745 | p.iph.protocol = IPPROTO_IPV6; | |
2746 | p.iph.ttl = 64; | |
d20b3109 | 2747 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 | 2748 | |
5bc3eb7e SH |
2749 | if (ops->ndo_do_ioctl) { |
2750 | mm_segment_t oldfs = get_fs(); | |
2751 | ||
2752 | set_fs(KERNEL_DS); | |
2753 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
2754 | set_fs(oldfs); | |
2755 | } else | |
2756 | err = -EOPNOTSUPP; | |
1da177e4 LT |
2757 | |
2758 | if (err == 0) { | |
2759 | err = -ENOBUFS; | |
af284937 DL |
2760 | dev = __dev_get_by_name(net, p.name); |
2761 | if (!dev) | |
1da177e4 LT |
2762 | goto err_exit; |
2763 | err = dev_open(dev); | |
2764 | } | |
2765 | } | |
0be669bb | 2766 | #endif |
1da177e4 LT |
2767 | |
2768 | err_exit: | |
2769 | rtnl_unlock(); | |
2770 | return err; | |
2771 | } | |
2772 | ||
93a714d6 MC |
2773 | static int ipv6_mc_config(struct sock *sk, bool join, |
2774 | const struct in6_addr *addr, int ifindex) | |
2775 | { | |
2776 | int ret; | |
2777 | ||
2778 | ASSERT_RTNL(); | |
2779 | ||
2780 | lock_sock(sk); | |
2781 | if (join) | |
54ff9ef3 | 2782 | ret = ipv6_sock_mc_join(sk, ifindex, addr); |
93a714d6 | 2783 | else |
54ff9ef3 | 2784 | ret = ipv6_sock_mc_drop(sk, ifindex, addr); |
93a714d6 MC |
2785 | release_sock(sk); |
2786 | ||
2787 | return ret; | |
2788 | } | |
2789 | ||
1da177e4 LT |
2790 | /* |
2791 | * Manual configuration of address on an interface | |
2792 | */ | |
479840ff JP |
2793 | static int inet6_addr_add(struct net *net, int ifindex, |
2794 | const struct in6_addr *pfx, | |
caeaba79 | 2795 | const struct in6_addr *peer_pfx, |
479840ff JP |
2796 | unsigned int plen, __u32 ifa_flags, |
2797 | __u32 prefered_lft, __u32 valid_lft) | |
1da177e4 LT |
2798 | { |
2799 | struct inet6_ifaddr *ifp; | |
2800 | struct inet6_dev *idev; | |
2801 | struct net_device *dev; | |
93a714d6 MC |
2802 | unsigned long timeout; |
2803 | clock_t expires; | |
1da177e4 | 2804 | int scope; |
6f704992 | 2805 | u32 flags; |
1da177e4 LT |
2806 | |
2807 | ASSERT_RTNL(); | |
1ab1457c | 2808 | |
24ef0da7 TG |
2809 | if (plen > 128) |
2810 | return -EINVAL; | |
2811 | ||
0778769d NT |
2812 | /* check the lifetime */ |
2813 | if (!valid_lft || prefered_lft > valid_lft) | |
2814 | return -EINVAL; | |
2815 | ||
53bd6749 JP |
2816 | if (ifa_flags & IFA_F_MANAGETEMPADDR && plen != 64) |
2817 | return -EINVAL; | |
2818 | ||
af284937 DL |
2819 | dev = __dev_get_by_index(net, ifindex); |
2820 | if (!dev) | |
1da177e4 | 2821 | return -ENODEV; |
1ab1457c | 2822 | |
64e724f6 BH |
2823 | idev = addrconf_add_dev(dev); |
2824 | if (IS_ERR(idev)) | |
2825 | return PTR_ERR(idev); | |
1da177e4 | 2826 | |
93a714d6 MC |
2827 | if (ifa_flags & IFA_F_MCAUTOJOIN) { |
2828 | int ret = ipv6_mc_config(net->ipv6.mc_autojoin_sk, | |
2829 | true, pfx, ifindex); | |
2830 | ||
2831 | if (ret < 0) | |
2832 | return ret; | |
2833 | } | |
2834 | ||
1da177e4 LT |
2835 | scope = ipv6_addr_scope(pfx); |
2836 | ||
4bed72e4 YH |
2837 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
2838 | if (addrconf_finite_timeout(timeout)) { | |
2839 | expires = jiffies_to_clock_t(timeout * HZ); | |
2840 | valid_lft = timeout; | |
6f704992 | 2841 | flags = RTF_EXPIRES; |
4bed72e4 YH |
2842 | } else { |
2843 | expires = 0; | |
2844 | flags = 0; | |
2845 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 2846 | } |
0778769d | 2847 | |
4bed72e4 YH |
2848 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
2849 | if (addrconf_finite_timeout(timeout)) { | |
2850 | if (timeout == 0) | |
2851 | ifa_flags |= IFA_F_DEPRECATED; | |
2852 | prefered_lft = timeout; | |
2853 | } | |
0778769d | 2854 | |
8a226b2c JB |
2855 | ifp = ipv6_add_addr(idev, pfx, peer_pfx, plen, scope, ifa_flags, |
2856 | valid_lft, prefered_lft); | |
0778769d | 2857 | |
1da177e4 | 2858 | if (!IS_ERR(ifp)) { |
761aac73 TH |
2859 | if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) { |
2860 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, | |
2861 | expires, flags); | |
2862 | } | |
2863 | ||
95c385b4 NH |
2864 | /* |
2865 | * Note that section 3.1 of RFC 4429 indicates | |
2866 | * that the Optimistic flag should not be set for | |
2867 | * manually configured addresses | |
2868 | */ | |
cf22f9a2 | 2869 | addrconf_dad_start(ifp); |
53bd6749 JP |
2870 | if (ifa_flags & IFA_F_MANAGETEMPADDR) |
2871 | manage_tempaddrs(idev, ifp, valid_lft, prefered_lft, | |
2872 | true, jiffies); | |
1da177e4 | 2873 | in6_ifa_put(ifp); |
c15b1cca | 2874 | addrconf_verify_rtnl(); |
1da177e4 | 2875 | return 0; |
93a714d6 MC |
2876 | } else if (ifa_flags & IFA_F_MCAUTOJOIN) { |
2877 | ipv6_mc_config(net->ipv6.mc_autojoin_sk, | |
2878 | false, pfx, ifindex); | |
1da177e4 LT |
2879 | } |
2880 | ||
2881 | return PTR_ERR(ifp); | |
2882 | } | |
2883 | ||
6046d5b4 HK |
2884 | static int inet6_addr_del(struct net *net, int ifindex, u32 ifa_flags, |
2885 | const struct in6_addr *pfx, unsigned int plen) | |
1da177e4 LT |
2886 | { |
2887 | struct inet6_ifaddr *ifp; | |
2888 | struct inet6_dev *idev; | |
2889 | struct net_device *dev; | |
1ab1457c | 2890 | |
24ef0da7 TG |
2891 | if (plen > 128) |
2892 | return -EINVAL; | |
2893 | ||
af284937 DL |
2894 | dev = __dev_get_by_index(net, ifindex); |
2895 | if (!dev) | |
1da177e4 LT |
2896 | return -ENODEV; |
2897 | ||
e5d08d71 | 2898 | idev = __in6_dev_get(dev); |
63159f29 | 2899 | if (!idev) |
1da177e4 LT |
2900 | return -ENXIO; |
2901 | ||
2902 | read_lock_bh(&idev->lock); | |
502a2ffd | 2903 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
2904 | if (ifp->prefix_len == plen && |
2905 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
2906 | in6_ifa_hold(ifp); | |
2907 | read_unlock_bh(&idev->lock); | |
1ab1457c | 2908 | |
6046d5b4 HK |
2909 | if (!(ifp->flags & IFA_F_TEMPORARY) && |
2910 | (ifa_flags & IFA_F_MANAGETEMPADDR)) | |
2911 | manage_tempaddrs(idev, ifp, 0, 0, false, | |
2912 | jiffies); | |
1da177e4 | 2913 | ipv6_del_addr(ifp); |
6046d5b4 | 2914 | addrconf_verify_rtnl(); |
93a714d6 MC |
2915 | if (ipv6_addr_is_multicast(pfx)) { |
2916 | ipv6_mc_config(net->ipv6.mc_autojoin_sk, | |
2917 | false, pfx, dev->ifindex); | |
2918 | } | |
1da177e4 LT |
2919 | return 0; |
2920 | } | |
2921 | } | |
2922 | read_unlock_bh(&idev->lock); | |
2923 | return -EADDRNOTAVAIL; | |
2924 | } | |
2925 | ||
2926 | ||
af284937 | 2927 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2928 | { |
2929 | struct in6_ifreq ireq; | |
2930 | int err; | |
1ab1457c | 2931 | |
af31f412 | 2932 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 | 2933 | return -EPERM; |
1ab1457c | 2934 | |
1da177e4 LT |
2935 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2936 | return -EFAULT; | |
2937 | ||
2938 | rtnl_lock(); | |
caeaba79 | 2939 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, NULL, |
af284937 DL |
2940 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, |
2941 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 LT |
2942 | rtnl_unlock(); |
2943 | return err; | |
2944 | } | |
2945 | ||
af284937 | 2946 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2947 | { |
2948 | struct in6_ifreq ireq; | |
2949 | int err; | |
1ab1457c | 2950 | |
af31f412 | 2951 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
2952 | return -EPERM; |
2953 | ||
2954 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2955 | return -EFAULT; | |
2956 | ||
2957 | rtnl_lock(); | |
6046d5b4 | 2958 | err = inet6_addr_del(net, ireq.ifr6_ifindex, 0, &ireq.ifr6_addr, |
af284937 | 2959 | ireq.ifr6_prefixlen); |
1da177e4 LT |
2960 | rtnl_unlock(); |
2961 | return err; | |
2962 | } | |
2963 | ||
b5f348e5 IJ |
2964 | static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
2965 | int plen, int scope) | |
2966 | { | |
2967 | struct inet6_ifaddr *ifp; | |
2968 | ||
8a226b2c | 2969 | ifp = ipv6_add_addr(idev, addr, NULL, plen, |
07edd741 HFS |
2970 | scope, IFA_F_PERMANENT, |
2971 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
b5f348e5 IJ |
2972 | if (!IS_ERR(ifp)) { |
2973 | spin_lock_bh(&ifp->lock); | |
2974 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2975 | spin_unlock_bh(&ifp->lock); | |
764d3be6 | 2976 | rt_genid_bump_ipv6(dev_net(idev->dev)); |
b5f348e5 IJ |
2977 | ipv6_ifa_notify(RTM_NEWADDR, ifp); |
2978 | in6_ifa_put(ifp); | |
2979 | } | |
2980 | } | |
2981 | ||
07a93626 | 2982 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2983 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2984 | { | |
1da177e4 LT |
2985 | struct in6_addr addr; |
2986 | struct net_device *dev; | |
c346dca1 | 2987 | struct net *net = dev_net(idev->dev); |
929c9cf3 | 2988 | int scope, plen; |
f0e2acfa | 2989 | u32 pflags = 0; |
1da177e4 LT |
2990 | |
2991 | ASSERT_RTNL(); | |
2992 | ||
2993 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2994 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2995 | ||
2996 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2997 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2998 | scope = IFA_LINK; | |
929c9cf3 | 2999 | plen = 64; |
1da177e4 LT |
3000 | } else { |
3001 | scope = IPV6_ADDR_COMPATv4; | |
929c9cf3 | 3002 | plen = 96; |
f0e2acfa | 3003 | pflags |= RTF_NONEXTHOP; |
1da177e4 LT |
3004 | } |
3005 | ||
3006 | if (addr.s6_addr32[3]) { | |
929c9cf3 | 3007 | add_addr(idev, &addr, plen, scope); |
f0e2acfa | 3008 | addrconf_prefix_route(&addr, plen, idev->dev, 0, pflags); |
1da177e4 LT |
3009 | return; |
3010 | } | |
3011 | ||
6fda7350 | 3012 | for_each_netdev(net, dev) { |
8e5e8f30 | 3013 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 | 3014 | if (in_dev && (dev->flags & IFF_UP)) { |
8e5e8f30 | 3015 | struct in_ifaddr *ifa; |
1da177e4 LT |
3016 | |
3017 | int flag = scope; | |
3018 | ||
3019 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
1da177e4 LT |
3020 | |
3021 | addr.s6_addr32[3] = ifa->ifa_local; | |
3022 | ||
3023 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
3024 | continue; | |
3025 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
3026 | if (idev->dev->flags&IFF_POINTOPOINT) | |
3027 | continue; | |
3028 | flag |= IFA_HOST; | |
3029 | } | |
1da177e4 | 3030 | |
b5f348e5 | 3031 | add_addr(idev, &addr, plen, flag); |
f0e2acfa ND |
3032 | addrconf_prefix_route(&addr, plen, idev->dev, 0, |
3033 | pflags); | |
1da177e4 LT |
3034 | } |
3035 | } | |
1ab1457c | 3036 | } |
1da177e4 | 3037 | } |
0be669bb | 3038 | #endif |
1da177e4 LT |
3039 | |
3040 | static void init_loopback(struct net_device *dev) | |
3041 | { | |
3042 | struct inet6_dev *idev; | |
1da177e4 LT |
3043 | |
3044 | /* ::1 */ | |
3045 | ||
3046 | ASSERT_RTNL(); | |
3047 | ||
e5d08d71 | 3048 | idev = ipv6_find_idev(dev); |
63159f29 | 3049 | if (!idev) { |
91df42be | 3050 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
3051 | return; |
3052 | } | |
3053 | ||
b5f348e5 | 3054 | add_addr(idev, &in6addr_loopback, 128, IFA_HOST); |
1da177e4 LT |
3055 | } |
3056 | ||
2ad3ed59 AA |
3057 | void addrconf_add_linklocal(struct inet6_dev *idev, |
3058 | const struct in6_addr *addr, u32 flags) | |
1da177e4 | 3059 | { |
8e5e8f30 | 3060 | struct inet6_ifaddr *ifp; |
64236f3f | 3061 | u32 addr_flags = flags | IFA_F_PERMANENT; |
95c385b4 NH |
3062 | |
3063 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
35e015e1 MC |
3064 | if ((dev_net(idev->dev)->ipv6.devconf_all->optimistic_dad || |
3065 | idev->cnf.optimistic_dad) && | |
702beb87 | 3066 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
95c385b4 NH |
3067 | addr_flags |= IFA_F_OPTIMISTIC; |
3068 | #endif | |
1da177e4 | 3069 | |
07edd741 HFS |
3070 | ifp = ipv6_add_addr(idev, addr, NULL, 64, IFA_LINK, addr_flags, |
3071 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 | 3072 | if (!IS_ERR(ifp)) { |
46d48046 | 3073 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
cf22f9a2 | 3074 | addrconf_dad_start(ifp); |
1da177e4 LT |
3075 | in6_ifa_put(ifp); |
3076 | } | |
3077 | } | |
2ad3ed59 | 3078 | EXPORT_SYMBOL_GPL(addrconf_add_linklocal); |
1da177e4 | 3079 | |
622c81d5 HFS |
3080 | static bool ipv6_reserved_interfaceid(struct in6_addr address) |
3081 | { | |
3082 | if ((address.s6_addr32[2] | address.s6_addr32[3]) == 0) | |
3083 | return true; | |
3084 | ||
3085 | if (address.s6_addr32[2] == htonl(0x02005eff) && | |
3086 | ((address.s6_addr32[3] & htonl(0xfe000000)) == htonl(0xfe000000))) | |
3087 | return true; | |
3088 | ||
3089 | if (address.s6_addr32[2] == htonl(0xfdffffff) && | |
3090 | ((address.s6_addr32[3] & htonl(0xffffff80)) == htonl(0xffffff80))) | |
3091 | return true; | |
3092 | ||
3093 | return false; | |
3094 | } | |
3095 | ||
3096 | static int ipv6_generate_stable_address(struct in6_addr *address, | |
3097 | u8 dad_count, | |
3098 | const struct inet6_dev *idev) | |
3099 | { | |
622c81d5 HFS |
3100 | static DEFINE_SPINLOCK(lock); |
3101 | static __u32 digest[SHA_DIGEST_WORDS]; | |
3102 | static __u32 workspace[SHA_WORKSPACE_WORDS]; | |
3103 | ||
3104 | static union { | |
3105 | char __data[SHA_MESSAGE_BYTES]; | |
3106 | struct { | |
3107 | struct in6_addr secret; | |
ff40217e | 3108 | __be32 prefix[2]; |
622c81d5 HFS |
3109 | unsigned char hwaddr[MAX_ADDR_LEN]; |
3110 | u8 dad_count; | |
3111 | } __packed; | |
3112 | } data; | |
3113 | ||
3114 | struct in6_addr secret; | |
3115 | struct in6_addr temp; | |
3116 | struct net *net = dev_net(idev->dev); | |
3117 | ||
3118 | BUILD_BUG_ON(sizeof(data.__data) != sizeof(data)); | |
3119 | ||
3120 | if (idev->cnf.stable_secret.initialized) | |
3121 | secret = idev->cnf.stable_secret.secret; | |
3122 | else if (net->ipv6.devconf_dflt->stable_secret.initialized) | |
3123 | secret = net->ipv6.devconf_dflt->stable_secret.secret; | |
3124 | else | |
3125 | return -1; | |
3126 | ||
3127 | retry: | |
3128 | spin_lock_bh(&lock); | |
3129 | ||
3130 | sha_init(digest); | |
3131 | memset(&data, 0, sizeof(data)); | |
3132 | memset(workspace, 0, sizeof(workspace)); | |
3133 | memcpy(data.hwaddr, idev->dev->perm_addr, idev->dev->addr_len); | |
ff40217e HFS |
3134 | data.prefix[0] = address->s6_addr32[0]; |
3135 | data.prefix[1] = address->s6_addr32[1]; | |
622c81d5 HFS |
3136 | data.secret = secret; |
3137 | data.dad_count = dad_count; | |
3138 | ||
3139 | sha_transform(digest, data.__data, workspace); | |
3140 | ||
3141 | temp = *address; | |
ff40217e HFS |
3142 | temp.s6_addr32[2] = (__force __be32)digest[0]; |
3143 | temp.s6_addr32[3] = (__force __be32)digest[1]; | |
622c81d5 HFS |
3144 | |
3145 | spin_unlock_bh(&lock); | |
3146 | ||
3147 | if (ipv6_reserved_interfaceid(temp)) { | |
3148 | dad_count++; | |
1855b7c3 | 3149 | if (dad_count > dev_net(idev->dev)->ipv6.sysctl.idgen_retries) |
622c81d5 HFS |
3150 | return -1; |
3151 | goto retry; | |
3152 | } | |
3153 | ||
3154 | *address = temp; | |
3155 | return 0; | |
3156 | } | |
3157 | ||
cc9da6cc BM |
3158 | static void ipv6_gen_mode_random_init(struct inet6_dev *idev) |
3159 | { | |
3160 | struct ipv6_stable_secret *s = &idev->cnf.stable_secret; | |
3161 | ||
3162 | if (s->initialized) | |
3163 | return; | |
3164 | s = &idev->cnf.stable_secret; | |
3165 | get_random_bytes(&s->secret, sizeof(s->secret)); | |
3166 | s->initialized = true; | |
3167 | } | |
3168 | ||
bc91b0f0 JP |
3169 | static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route) |
3170 | { | |
622c81d5 HFS |
3171 | struct in6_addr addr; |
3172 | ||
ca254490 DA |
3173 | /* no link local addresses on L3 master devices */ |
3174 | if (netif_is_l3_master(idev->dev)) | |
3175 | return; | |
3176 | ||
622c81d5 | 3177 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); |
bc91b0f0 | 3178 | |
d35a00b8 | 3179 | switch (idev->cnf.addr_gen_mode) { |
cc9da6cc BM |
3180 | case IN6_ADDR_GEN_MODE_RANDOM: |
3181 | ipv6_gen_mode_random_init(idev); | |
3182 | /* fallthrough */ | |
3183 | case IN6_ADDR_GEN_MODE_STABLE_PRIVACY: | |
622c81d5 | 3184 | if (!ipv6_generate_stable_address(&addr, 0, idev)) |
64236f3f HFS |
3185 | addrconf_add_linklocal(idev, &addr, |
3186 | IFA_F_STABLE_PRIVACY); | |
622c81d5 HFS |
3187 | else if (prefix_route) |
3188 | addrconf_prefix_route(&addr, 64, idev->dev, 0, 0); | |
cc9da6cc BM |
3189 | break; |
3190 | case IN6_ADDR_GEN_MODE_EUI64: | |
bc91b0f0 JP |
3191 | /* addrconf_add_linklocal also adds a prefix_route and we |
3192 | * only need to care about prefix routes if ipv6_generate_eui64 | |
3193 | * couldn't generate one. | |
3194 | */ | |
3195 | if (ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) == 0) | |
64236f3f | 3196 | addrconf_add_linklocal(idev, &addr, 0); |
bc91b0f0 JP |
3197 | else if (prefix_route) |
3198 | addrconf_prefix_route(&addr, 64, idev->dev, 0, 0); | |
cc9da6cc BM |
3199 | break; |
3200 | case IN6_ADDR_GEN_MODE_NONE: | |
3201 | default: | |
3202 | /* will not add any link local address */ | |
3203 | break; | |
bc91b0f0 JP |
3204 | } |
3205 | } | |
3206 | ||
1da177e4 LT |
3207 | static void addrconf_dev_config(struct net_device *dev) |
3208 | { | |
8e5e8f30 | 3209 | struct inet6_dev *idev; |
1da177e4 LT |
3210 | |
3211 | ASSERT_RTNL(); | |
3212 | ||
74235a25 HX |
3213 | if ((dev->type != ARPHRD_ETHER) && |
3214 | (dev->type != ARPHRD_FDDI) && | |
74235a25 | 3215 | (dev->type != ARPHRD_ARCNET) && |
06a4c1c5 | 3216 | (dev->type != ARPHRD_INFINIBAND) && |
e837735e | 3217 | (dev->type != ARPHRD_IEEE1394) && |
e74bccb8 | 3218 | (dev->type != ARPHRD_TUNNEL6) && |
cc9da6cc | 3219 | (dev->type != ARPHRD_6LOWPAN) && |
45ce0fd1 FJ |
3220 | (dev->type != ARPHRD_IP6GRE) && |
3221 | (dev->type != ARPHRD_IPGRE) && | |
3222 | (dev->type != ARPHRD_TUNNEL) && | |
cc9da6cc | 3223 | (dev->type != ARPHRD_NONE)) { |
74235a25 HX |
3224 | /* Alas, we support only Ethernet autoconfiguration. */ |
3225 | return; | |
3226 | } | |
3227 | ||
1da177e4 | 3228 | idev = addrconf_add_dev(dev); |
64e724f6 | 3229 | if (IS_ERR(idev)) |
1da177e4 LT |
3230 | return; |
3231 | ||
cc9da6cc BM |
3232 | /* this device type has no EUI support */ |
3233 | if (dev->type == ARPHRD_NONE && | |
d35a00b8 FJ |
3234 | idev->cnf.addr_gen_mode == IN6_ADDR_GEN_MODE_EUI64) |
3235 | idev->cnf.addr_gen_mode = IN6_ADDR_GEN_MODE_RANDOM; | |
cc9da6cc | 3236 | |
bc91b0f0 | 3237 | addrconf_addr_gen(idev, false); |
1da177e4 LT |
3238 | } |
3239 | ||
07a93626 | 3240 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
3241 | static void addrconf_sit_config(struct net_device *dev) |
3242 | { | |
3243 | struct inet6_dev *idev; | |
3244 | ||
3245 | ASSERT_RTNL(); | |
3246 | ||
1ab1457c YH |
3247 | /* |
3248 | * Configure the tunnel with one of our IPv4 | |
3249 | * addresses... we should configure all of | |
1da177e4 LT |
3250 | * our v4 addrs in the tunnel |
3251 | */ | |
3252 | ||
e5d08d71 | 3253 | idev = ipv6_find_idev(dev); |
63159f29 | 3254 | if (!idev) { |
91df42be | 3255 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
3256 | return; |
3257 | } | |
3258 | ||
c7dc89c0 | 3259 | if (dev->priv_flags & IFF_ISATAP) { |
bc91b0f0 | 3260 | addrconf_addr_gen(idev, false); |
c7dc89c0 FT |
3261 | return; |
3262 | } | |
3263 | ||
1da177e4 LT |
3264 | sit_add_v4_addrs(idev); |
3265 | ||
62b54dd9 | 3266 | if (dev->flags&IFF_POINTOPOINT) |
1da177e4 | 3267 | addrconf_add_mroute(dev); |
1da177e4 | 3268 | } |
0be669bb | 3269 | #endif |
1da177e4 | 3270 | |
07a93626 | 3271 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
aee80b54 | 3272 | static void addrconf_gre_config(struct net_device *dev) |
3273 | { | |
3274 | struct inet6_dev *idev; | |
aee80b54 | 3275 | |
aee80b54 | 3276 | ASSERT_RTNL(); |
3277 | ||
e5d08d71 | 3278 | idev = ipv6_find_idev(dev); |
63159f29 | 3279 | if (!idev) { |
91df42be | 3280 | pr_debug("%s: add_dev failed\n", __func__); |
aee80b54 | 3281 | return; |
3282 | } | |
3283 | ||
bc91b0f0 | 3284 | addrconf_addr_gen(idev, true); |
d9e4ce65 HFS |
3285 | if (dev->flags & IFF_POINTOPOINT) |
3286 | addrconf_add_mroute(dev); | |
aee80b54 | 3287 | } |
3288 | #endif | |
3289 | ||
f1705ec1 DA |
3290 | static int fixup_permanent_addr(struct inet6_dev *idev, |
3291 | struct inet6_ifaddr *ifp) | |
3292 | { | |
fc882fcf | 3293 | /* !rt6i_node means the host route was removed from the |
8048ced9 DA |
3294 | * FIB, for example, if 'lo' device is taken down. In that |
3295 | * case regenerate the host route. | |
3296 | */ | |
fc882fcf | 3297 | if (!ifp->rt || !ifp->rt->rt6i_node) { |
8048ced9 | 3298 | struct rt6_info *rt, *prev; |
f1705ec1 DA |
3299 | |
3300 | rt = addrconf_dst_alloc(idev, &ifp->addr, false); | |
3301 | if (unlikely(IS_ERR(rt))) | |
3302 | return PTR_ERR(rt); | |
3303 | ||
8048ced9 DA |
3304 | /* ifp->rt can be accessed outside of rtnl */ |
3305 | spin_lock(&ifp->lock); | |
3306 | prev = ifp->rt; | |
f1705ec1 | 3307 | ifp->rt = rt; |
8048ced9 DA |
3308 | spin_unlock(&ifp->lock); |
3309 | ||
3310 | ip6_rt_put(prev); | |
f1705ec1 DA |
3311 | } |
3312 | ||
3313 | if (!(ifp->flags & IFA_F_NOPREFIXROUTE)) { | |
3314 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, | |
3315 | idev->dev, 0, 0); | |
3316 | } | |
3317 | ||
6d717134 DA |
3318 | if (ifp->state == INET6_IFADDR_STATE_PREDAD) |
3319 | addrconf_dad_start(ifp); | |
f1705ec1 DA |
3320 | |
3321 | return 0; | |
3322 | } | |
3323 | ||
3324 | static void addrconf_permanent_addr(struct net_device *dev) | |
3325 | { | |
3326 | struct inet6_ifaddr *ifp, *tmp; | |
3327 | struct inet6_dev *idev; | |
3328 | ||
3329 | idev = __in6_dev_get(dev); | |
3330 | if (!idev) | |
3331 | return; | |
3332 | ||
3333 | write_lock_bh(&idev->lock); | |
3334 | ||
3335 | list_for_each_entry_safe(ifp, tmp, &idev->addr_list, if_list) { | |
3336 | if ((ifp->flags & IFA_F_PERMANENT) && | |
3337 | fixup_permanent_addr(idev, ifp) < 0) { | |
3338 | write_unlock_bh(&idev->lock); | |
e669b869 | 3339 | in6_ifa_hold(ifp); |
f1705ec1 DA |
3340 | ipv6_del_addr(ifp); |
3341 | write_lock_bh(&idev->lock); | |
3342 | ||
3343 | net_info_ratelimited("%s: Failed to add prefix route for address %pI6c; dropping\n", | |
3344 | idev->dev->name, &ifp->addr); | |
3345 | } | |
3346 | } | |
3347 | ||
3348 | write_unlock_bh(&idev->lock); | |
3349 | } | |
3350 | ||
1ab1457c | 3351 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
351638e7 | 3352 | void *ptr) |
1da177e4 | 3353 | { |
351638e7 | 3354 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
4f7f34ea | 3355 | struct netdev_notifier_changeupper_info *info; |
748e2d93 | 3356 | struct inet6_dev *idev = __in6_dev_get(dev); |
60abc0be | 3357 | struct net *net = dev_net(dev); |
c5e33bdd | 3358 | int run_pending = 0; |
b217d616 | 3359 | int err; |
1da177e4 | 3360 | |
e21e8467 | 3361 | switch (event) { |
45ba9dd2 | 3362 | case NETDEV_REGISTER: |
74235a25 | 3363 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 | 3364 | idev = ipv6_add_dev(dev); |
a317a2f1 WC |
3365 | if (IS_ERR(idev)) |
3366 | return notifier_from_errno(PTR_ERR(idev)); | |
45ba9dd2 YH |
3367 | } |
3368 | break; | |
bcdd553f | 3369 | |
b7b0b1d2 AD |
3370 | case NETDEV_CHANGEMTU: |
3371 | /* if MTU under IPV6_MIN_MTU stop IPv6 on this interface. */ | |
3372 | if (dev->mtu < IPV6_MIN_MTU) { | |
60abc0be | 3373 | addrconf_ifdown(dev, dev != net->loopback_dev); |
b7b0b1d2 AD |
3374 | break; |
3375 | } | |
3376 | ||
3377 | if (idev) { | |
3378 | rt6_mtu_change(dev, dev->mtu); | |
3379 | idev->cnf.mtu6 = dev->mtu; | |
3380 | break; | |
3381 | } | |
3382 | ||
3383 | /* allocate new idev */ | |
3384 | idev = ipv6_add_dev(dev); | |
3385 | if (IS_ERR(idev)) | |
3386 | break; | |
3387 | ||
3388 | /* device is still not ready */ | |
3389 | if (!(idev->if_flags & IF_READY)) | |
3390 | break; | |
3391 | ||
3392 | run_pending = 1; | |
3393 | ||
3394 | /* fall through */ | |
3395 | ||
1da177e4 | 3396 | case NETDEV_UP: |
3c21edbd | 3397 | case NETDEV_CHANGE: |
c2edacf8 JV |
3398 | if (dev->flags & IFF_SLAVE) |
3399 | break; | |
3400 | ||
3ce62a84 WC |
3401 | if (idev && idev->cnf.disable_ipv6) |
3402 | break; | |
3403 | ||
3c21edbd | 3404 | if (event == NETDEV_UP) { |
38bd10c4 DA |
3405 | /* restore routes for permanent addresses */ |
3406 | addrconf_permanent_addr(dev); | |
3407 | ||
0006d8c7 | 3408 | if (!addrconf_link_ready(dev)) { |
3c21edbd | 3409 | /* device is not ready yet. */ |
f3213831 | 3410 | pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n", |
3c21edbd YH |
3411 | dev->name); |
3412 | break; | |
3413 | } | |
99081049 | 3414 | |
d31c7b8f EP |
3415 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
3416 | idev = ipv6_add_dev(dev); | |
3417 | ||
a317a2f1 | 3418 | if (!IS_ERR_OR_NULL(idev)) { |
99081049 | 3419 | idev->if_flags |= IF_READY; |
e3ec6cfc BT |
3420 | run_pending = 1; |
3421 | } | |
b7b0b1d2 | 3422 | } else if (event == NETDEV_CHANGE) { |
0006d8c7 | 3423 | if (!addrconf_link_ready(dev)) { |
3c21edbd YH |
3424 | /* device is still not ready. */ |
3425 | break; | |
3426 | } | |
3427 | ||
3428 | if (idev) { | |
a088d1d7 LL |
3429 | if (idev->if_flags & IF_READY) { |
3430 | /* device is already configured - | |
3431 | * but resend MLD reports, we might | |
3432 | * have roamed and need to update | |
3433 | * multicast snooping switches | |
3434 | */ | |
3435 | ipv6_mc_up(idev); | |
3c21edbd | 3436 | break; |
a088d1d7 | 3437 | } |
3c21edbd YH |
3438 | idev->if_flags |= IF_READY; |
3439 | } | |
3440 | ||
f3213831 JP |
3441 | pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n", |
3442 | dev->name); | |
3c21edbd | 3443 | |
c5e33bdd | 3444 | run_pending = 1; |
3c21edbd YH |
3445 | } |
3446 | ||
e21e8467 | 3447 | switch (dev->type) { |
07a93626 | 3448 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
3449 | case ARPHRD_SIT: |
3450 | addrconf_sit_config(dev); | |
3451 | break; | |
aee80b54 | 3452 | #endif |
07a93626 | 3453 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
aee80b54 | 3454 | case ARPHRD_IPGRE: |
3455 | addrconf_gre_config(dev); | |
3456 | break; | |
0be669bb | 3457 | #endif |
1da177e4 LT |
3458 | case ARPHRD_LOOPBACK: |
3459 | init_loopback(dev); | |
3460 | break; | |
3461 | ||
3462 | default: | |
3463 | addrconf_dev_config(dev); | |
3464 | break; | |
3ff50b79 | 3465 | } |
bcdd553f | 3466 | |
a317a2f1 | 3467 | if (!IS_ERR_OR_NULL(idev)) { |
c5e33bdd YH |
3468 | if (run_pending) |
3469 | addrconf_dad_run(idev); | |
3470 | ||
bcdd553f SH |
3471 | /* |
3472 | * If the MTU changed during the interface down, | |
3473 | * when the interface up, the changed MTU must be | |
3474 | * reflected in the idev as well as routers. | |
1da177e4 | 3475 | */ |
bcdd553f SH |
3476 | if (idev->cnf.mtu6 != dev->mtu && |
3477 | dev->mtu >= IPV6_MIN_MTU) { | |
1da177e4 LT |
3478 | rt6_mtu_change(dev, dev->mtu); |
3479 | idev->cnf.mtu6 = dev->mtu; | |
3480 | } | |
3481 | idev->tstamp = jiffies; | |
3482 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
bcdd553f SH |
3483 | |
3484 | /* | |
3485 | * If the changed mtu during down is lower than | |
3486 | * IPV6_MIN_MTU stop IPv6 on this interface. | |
1da177e4 LT |
3487 | */ |
3488 | if (dev->mtu < IPV6_MIN_MTU) | |
60abc0be | 3489 | addrconf_ifdown(dev, dev != net->loopback_dev); |
1da177e4 LT |
3490 | } |
3491 | break; | |
3492 | ||
1da177e4 LT |
3493 | case NETDEV_DOWN: |
3494 | case NETDEV_UNREGISTER: | |
3495 | /* | |
3496 | * Remove all addresses from this interface. | |
3497 | */ | |
3498 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
3499 | break; | |
3c21edbd | 3500 | |
1da177e4 | 3501 | case NETDEV_CHANGENAME: |
1da177e4 | 3502 | if (idev) { |
5632c515 | 3503 | snmp6_unregister_dev(idev); |
408c4768 | 3504 | addrconf_sysctl_unregister(idev); |
a317a2f1 | 3505 | err = addrconf_sysctl_register(idev); |
b217d616 HX |
3506 | if (err) |
3507 | return notifier_from_errno(err); | |
a317a2f1 WC |
3508 | err = snmp6_register_dev(idev); |
3509 | if (err) { | |
3510 | addrconf_sysctl_unregister(idev); | |
3511 | return notifier_from_errno(err); | |
3512 | } | |
5632c515 | 3513 | } |
1da177e4 | 3514 | break; |
bcdd553f | 3515 | |
93d9b7d7 JP |
3516 | case NETDEV_PRE_TYPE_CHANGE: |
3517 | case NETDEV_POST_TYPE_CHANGE: | |
3ef0952c AL |
3518 | if (idev) |
3519 | addrconf_type_change(dev, event); | |
75c78500 | 3520 | break; |
4f7f34ea DA |
3521 | |
3522 | case NETDEV_CHANGEUPPER: | |
3523 | info = ptr; | |
3524 | ||
3525 | /* flush all routes if dev is linked to or unlinked from | |
3526 | * an L3 master device (e.g., VRF) | |
3527 | */ | |
3528 | if (info->upper_dev && netif_is_l3_master(info->upper_dev)) | |
3529 | addrconf_ifdown(dev, 0); | |
3ff50b79 | 3530 | } |
1da177e4 LT |
3531 | |
3532 | return NOTIFY_OK; | |
3533 | } | |
3534 | ||
3535 | /* | |
3536 | * addrconf module should be notified of a device going up | |
3537 | */ | |
3538 | static struct notifier_block ipv6_dev_notf = { | |
3539 | .notifier_call = addrconf_notify, | |
242d3a49 | 3540 | .priority = ADDRCONF_NOTIFY_PRIORITY, |
1da177e4 LT |
3541 | }; |
3542 | ||
93d9b7d7 | 3543 | static void addrconf_type_change(struct net_device *dev, unsigned long event) |
75c78500 MS |
3544 | { |
3545 | struct inet6_dev *idev; | |
3546 | ASSERT_RTNL(); | |
3547 | ||
3548 | idev = __in6_dev_get(dev); | |
3549 | ||
93d9b7d7 | 3550 | if (event == NETDEV_POST_TYPE_CHANGE) |
75c78500 | 3551 | ipv6_mc_remap(idev); |
93d9b7d7 | 3552 | else if (event == NETDEV_PRE_TYPE_CHANGE) |
75c78500 MS |
3553 | ipv6_mc_unmap(idev); |
3554 | } | |
3555 | ||
70af921d DA |
3556 | static bool addr_is_local(const struct in6_addr *addr) |
3557 | { | |
3558 | return ipv6_addr_type(addr) & | |
3559 | (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_LOOPBACK); | |
3560 | } | |
3561 | ||
1da177e4 LT |
3562 | static int addrconf_ifdown(struct net_device *dev, int how) |
3563 | { | |
c346dca1 | 3564 | struct net *net = dev_net(dev); |
502a2ffd | 3565 | struct inet6_dev *idev; |
f1705ec1 DA |
3566 | struct inet6_ifaddr *ifa, *tmp; |
3567 | struct list_head del_list; | |
3568 | int _keep_addr; | |
3569 | bool keep_addr; | |
73a8bd74 | 3570 | int state, i; |
1da177e4 LT |
3571 | |
3572 | ASSERT_RTNL(); | |
3573 | ||
73a8bd74 DM |
3574 | rt6_ifdown(net, dev); |
3575 | neigh_ifdown(&nd_tbl, dev); | |
1da177e4 LT |
3576 | |
3577 | idev = __in6_dev_get(dev); | |
63159f29 | 3578 | if (!idev) |
1da177e4 LT |
3579 | return -ENODEV; |
3580 | ||
bcdd553f SH |
3581 | /* |
3582 | * Step 1: remove reference to ipv6 device from parent device. | |
3583 | * Do not dev_put! | |
1da177e4 | 3584 | */ |
439e2385 | 3585 | if (how) { |
1da177e4 | 3586 | idev->dead = 1; |
8814c4b5 YH |
3587 | |
3588 | /* protected by rtnl_lock */ | |
a9b3cd7f | 3589 | RCU_INIT_POINTER(dev->ip6_ptr, NULL); |
1da177e4 LT |
3590 | |
3591 | /* Step 1.5: remove snmp6 entry */ | |
3592 | snmp6_unregister_dev(idev); | |
3593 | ||
3594 | } | |
3595 | ||
f1705ec1 DA |
3596 | /* aggregate the system setting and interface setting */ |
3597 | _keep_addr = net->ipv6.devconf_all->keep_addr_on_down; | |
3598 | if (!_keep_addr) | |
3599 | _keep_addr = idev->cnf.keep_addr_on_down; | |
3600 | ||
3601 | /* combine the user config with event to determine if permanent | |
3602 | * addresses are to be removed from address hash table | |
3603 | */ | |
bc561632 | 3604 | keep_addr = !(how || _keep_addr <= 0 || idev->cnf.disable_ipv6); |
f1705ec1 | 3605 | |
73a8bd74 DM |
3606 | /* Step 2: clear hash table */ |
3607 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { | |
3608 | struct hlist_head *h = &inet6_addr_lst[i]; | |
73a8bd74 DM |
3609 | |
3610 | spin_lock_bh(&addrconf_hash_lock); | |
67ba4152 | 3611 | restart: |
b67bfe0d | 3612 | hlist_for_each_entry_rcu(ifa, h, addr_lst) { |
73a8bd74 | 3613 | if (ifa->idev == idev) { |
c15b1cca | 3614 | addrconf_del_dad_work(ifa); |
f1705ec1 DA |
3615 | /* combined flag + permanent flag decide if |
3616 | * address is retained on a down event | |
3617 | */ | |
3618 | if (!keep_addr || | |
70af921d DA |
3619 | !(ifa->flags & IFA_F_PERMANENT) || |
3620 | addr_is_local(&ifa->addr)) { | |
f1705ec1 DA |
3621 | hlist_del_init_rcu(&ifa->addr_lst); |
3622 | goto restart; | |
3623 | } | |
73a8bd74 DM |
3624 | } |
3625 | } | |
3626 | spin_unlock_bh(&addrconf_hash_lock); | |
3627 | } | |
3628 | ||
1da177e4 LT |
3629 | write_lock_bh(&idev->lock); |
3630 | ||
b7b1bfce HFS |
3631 | addrconf_del_rs_timer(idev); |
3632 | ||
bcdd553f | 3633 | /* Step 2: clear flags for stateless addrconf */ |
439e2385 | 3634 | if (!how) |
3c21edbd | 3635 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 | 3636 | |
bcdd553f | 3637 | /* Step 3: clear tempaddr list */ |
372e6c8f | 3638 | while (!list_empty(&idev->tempaddr_list)) { |
3639 | ifa = list_first_entry(&idev->tempaddr_list, | |
3640 | struct inet6_ifaddr, tmp_list); | |
3641 | list_del(&ifa->tmp_list); | |
1da177e4 LT |
3642 | write_unlock_bh(&idev->lock); |
3643 | spin_lock_bh(&ifa->lock); | |
3644 | ||
3645 | if (ifa->ifpub) { | |
3646 | in6_ifa_put(ifa->ifpub); | |
3647 | ifa->ifpub = NULL; | |
3648 | } | |
3649 | spin_unlock_bh(&ifa->lock); | |
3650 | in6_ifa_put(ifa); | |
3651 | write_lock_bh(&idev->lock); | |
3652 | } | |
8f37ada5 | 3653 | |
f1705ec1 DA |
3654 | /* re-combine the user config with event to determine if permanent |
3655 | * addresses are to be removed from the interface list | |
3656 | */ | |
bc561632 | 3657 | keep_addr = (!how && _keep_addr > 0 && !idev->cnf.disable_ipv6); |
84e8b803 | 3658 | |
f1705ec1 DA |
3659 | INIT_LIST_HEAD(&del_list); |
3660 | list_for_each_entry_safe(ifa, tmp, &idev->addr_list, if_list) { | |
38bd10c4 | 3661 | struct rt6_info *rt = NULL; |
a2d6cbb0 | 3662 | bool keep; |
38bd10c4 | 3663 | |
f1705ec1 | 3664 | addrconf_del_dad_work(ifa); |
84e8b803 | 3665 | |
a2d6cbb0 RV |
3666 | keep = keep_addr && (ifa->flags & IFA_F_PERMANENT) && |
3667 | !addr_is_local(&ifa->addr); | |
3668 | if (!keep) | |
3669 | list_move(&ifa->if_list, &del_list); | |
3670 | ||
73a8bd74 | 3671 | write_unlock_bh(&idev->lock); |
8e8e676d | 3672 | spin_lock_bh(&ifa->lock); |
f1705ec1 | 3673 | |
a2d6cbb0 | 3674 | if (keep) { |
f1705ec1 DA |
3675 | /* set state to skip the notifier below */ |
3676 | state = INET6_IFADDR_STATE_DEAD; | |
6d717134 | 3677 | ifa->state = INET6_IFADDR_STATE_PREDAD; |
f1705ec1 DA |
3678 | if (!(ifa->flags & IFA_F_NODAD)) |
3679 | ifa->flags |= IFA_F_TENTATIVE; | |
38bd10c4 DA |
3680 | |
3681 | rt = ifa->rt; | |
3682 | ifa->rt = NULL; | |
f1705ec1 DA |
3683 | } else { |
3684 | state = ifa->state; | |
3685 | ifa->state = INET6_IFADDR_STATE_DEAD; | |
f1705ec1 DA |
3686 | } |
3687 | ||
8e8e676d | 3688 | spin_unlock_bh(&ifa->lock); |
9d82ca98 | 3689 | |
38bd10c4 DA |
3690 | if (rt) |
3691 | ip6_del_rt(rt); | |
3692 | ||
73a8bd74 DM |
3693 | if (state != INET6_IFADDR_STATE_DEAD) { |
3694 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
f88c91dd | 3695 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifa); |
ea06f717 MM |
3696 | } else { |
3697 | if (idev->cnf.forwarding) | |
3698 | addrconf_leave_anycast(ifa); | |
3699 | addrconf_leave_solict(ifa->idev, &ifa->addr); | |
27bdb2ab | 3700 | } |
8f37ada5 | 3701 | |
73a8bd74 DM |
3702 | write_lock_bh(&idev->lock); |
3703 | } | |
8f37ada5 | 3704 | |
1da177e4 LT |
3705 | write_unlock_bh(&idev->lock); |
3706 | ||
f1705ec1 DA |
3707 | /* now clean up addresses to be removed */ |
3708 | while (!list_empty(&del_list)) { | |
3709 | ifa = list_first_entry(&del_list, | |
3710 | struct inet6_ifaddr, if_list); | |
3711 | list_del(&ifa->if_list); | |
3712 | ||
3713 | in6_ifa_put(ifa); | |
3714 | } | |
3715 | ||
381f4dca SD |
3716 | /* Step 5: Discard anycast and multicast list */ |
3717 | if (how) { | |
3718 | ipv6_ac_destroy_dev(idev); | |
1da177e4 | 3719 | ipv6_mc_destroy_dev(idev); |
381f4dca | 3720 | } else { |
1da177e4 | 3721 | ipv6_mc_down(idev); |
381f4dca | 3722 | } |
1da177e4 | 3723 | |
1da177e4 | 3724 | idev->tstamp = jiffies; |
1ab1457c | 3725 | |
bcdd553f | 3726 | /* Last: Shot the device (if unregistered) */ |
439e2385 | 3727 | if (how) { |
408c4768 | 3728 | addrconf_sysctl_unregister(idev); |
1da177e4 LT |
3729 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
3730 | neigh_ifdown(&nd_tbl, dev); | |
3731 | in6_dev_put(idev); | |
3732 | } | |
3733 | return 0; | |
3734 | } | |
3735 | ||
3736 | static void addrconf_rs_timer(unsigned long data) | |
3737 | { | |
b7b1bfce | 3738 | struct inet6_dev *idev = (struct inet6_dev *)data; |
caf92bc4 | 3739 | struct net_device *dev = idev->dev; |
b7b1bfce | 3740 | struct in6_addr lladdr; |
1da177e4 | 3741 | |
b7b1bfce | 3742 | write_lock(&idev->lock); |
5b2a1953 | 3743 | if (idev->dead || !(idev->if_flags & IF_READY)) |
1da177e4 LT |
3744 | goto out; |
3745 | ||
9ba2add3 | 3746 | if (!ipv6_accept_ra(idev)) |
5b2a1953 | 3747 | goto out; |
3748 | ||
3749 | /* Announcement received after solicitation was sent */ | |
3750 | if (idev->if_flags & IF_RA_RCVD) | |
1da177e4 | 3751 | goto out; |
1da177e4 | 3752 | |
bd11f074 | 3753 | if (idev->rs_probes++ < idev->cnf.rtr_solicits || idev->cnf.rtr_solicits < 0) { |
caf92bc4 CW |
3754 | write_unlock(&idev->lock); |
3755 | if (!ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) | |
3756 | ndisc_send_rs(dev, &lladdr, | |
b7b1bfce HFS |
3757 | &in6addr_linklocal_allrouters); |
3758 | else | |
caf92bc4 | 3759 | goto put; |
1da177e4 | 3760 | |
caf92bc4 | 3761 | write_lock(&idev->lock); |
bd11f074 MŻ |
3762 | idev->rs_interval = rfc3315_s14_backoff_update( |
3763 | idev->rs_interval, idev->cnf.rtr_solicit_max_interval); | |
b7b1bfce HFS |
3764 | /* The wait after the last probe can be shorter */ |
3765 | addrconf_mod_rs_timer(idev, (idev->rs_probes == | |
3766 | idev->cnf.rtr_solicits) ? | |
3767 | idev->cnf.rtr_solicit_delay : | |
bd11f074 | 3768 | idev->rs_interval); |
1da177e4 | 3769 | } else { |
1da177e4 LT |
3770 | /* |
3771 | * Note: we do not support deprecated "all on-link" | |
3772 | * assumption any longer. | |
3773 | */ | |
91df42be | 3774 | pr_debug("%s: no IPv6 routers present\n", idev->dev->name); |
1da177e4 LT |
3775 | } |
3776 | ||
3777 | out: | |
b7b1bfce | 3778 | write_unlock(&idev->lock); |
caf92bc4 | 3779 | put: |
b7b1bfce | 3780 | in6_dev_put(idev); |
1da177e4 LT |
3781 | } |
3782 | ||
3783 | /* | |
3784 | * Duplicate Address Detection | |
3785 | */ | |
3c21edbd YH |
3786 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
3787 | { | |
3788 | unsigned long rand_num; | |
3789 | struct inet6_dev *idev = ifp->idev; | |
adc176c5 | 3790 | u64 nonce; |
3c21edbd | 3791 | |
95c385b4 NH |
3792 | if (ifp->flags & IFA_F_OPTIMISTIC) |
3793 | rand_num = 0; | |
3794 | else | |
63862b5b | 3795 | rand_num = prandom_u32() % (idev->cnf.rtr_solicit_delay ? : 1); |
95c385b4 | 3796 | |
adc176c5 EN |
3797 | nonce = 0; |
3798 | if (idev->cnf.enhanced_dad || | |
3799 | dev_net(idev->dev)->ipv6.devconf_all->enhanced_dad) { | |
3800 | do | |
3801 | get_random_bytes(&nonce, 6); | |
3802 | while (nonce == 0); | |
3803 | } | |
3804 | ifp->dad_nonce = nonce; | |
b7b1bfce | 3805 | ifp->dad_probes = idev->cnf.dad_transmits; |
c15b1cca | 3806 | addrconf_mod_dad_work(ifp, rand_num); |
3c21edbd YH |
3807 | } |
3808 | ||
c15b1cca | 3809 | static void addrconf_dad_begin(struct inet6_ifaddr *ifp) |
1da177e4 LT |
3810 | { |
3811 | struct inet6_dev *idev = ifp->idev; | |
3812 | struct net_device *dev = idev->dev; | |
764d3be6 | 3813 | bool bump_id, notify = false; |
1da177e4 LT |
3814 | |
3815 | addrconf_join_solict(dev, &ifp->addr); | |
3816 | ||
63862b5b | 3817 | prandom_seed((__force u32) ifp->addr.s6_addr32[3]); |
1da177e4 LT |
3818 | |
3819 | read_lock_bh(&idev->lock); | |
622ccdf1 | 3820 | spin_lock(&ifp->lock); |
e9d3e084 | 3821 | if (ifp->state == INET6_IFADDR_STATE_DEAD) |
1da177e4 | 3822 | goto out; |
1da177e4 LT |
3823 | |
3824 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
a2d3f3e3 MC |
3825 | (dev_net(dev)->ipv6.devconf_all->accept_dad < 1 && |
3826 | idev->cnf.accept_dad < 1) || | |
55ebaef1 NT |
3827 | !(ifp->flags&IFA_F_TENTATIVE) || |
3828 | ifp->flags & IFA_F_NODAD) { | |
07ca93e3 DA |
3829 | bool send_na = false; |
3830 | ||
3831 | if (ifp->flags & IFA_F_TENTATIVE && | |
3832 | !(ifp->flags & IFA_F_OPTIMISTIC)) | |
3833 | send_na = true; | |
764d3be6 | 3834 | bump_id = ifp->flags & IFA_F_TENTATIVE; |
cc411d0b | 3835 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 3836 | spin_unlock(&ifp->lock); |
1da177e4 LT |
3837 | read_unlock_bh(&idev->lock); |
3838 | ||
07ca93e3 | 3839 | addrconf_dad_completed(ifp, bump_id, send_na); |
1da177e4 LT |
3840 | return; |
3841 | } | |
3842 | ||
6732bade | 3843 | if (!(idev->if_flags & IF_READY)) { |
21809faf | 3844 | spin_unlock(&ifp->lock); |
6732bade | 3845 | read_unlock_bh(&idev->lock); |
3c21edbd | 3846 | /* |
590a9887 | 3847 | * If the device is not ready: |
3c21edbd YH |
3848 | * - keep it tentative if it is a permanent address. |
3849 | * - otherwise, kill it. | |
3850 | */ | |
3851 | in6_ifa_hold(ifp); | |
cc411d0b | 3852 | addrconf_dad_stop(ifp, 0); |
6732bade | 3853 | return; |
3c21edbd | 3854 | } |
95c385b4 NH |
3855 | |
3856 | /* | |
3857 | * Optimistic nodes can start receiving | |
3858 | * Frames right away | |
3859 | */ | |
7fd2561e | 3860 | if (ifp->flags & IFA_F_OPTIMISTIC) { |
95c385b4 | 3861 | ip6_ins_rt(ifp->rt); |
35e015e1 | 3862 | if (ipv6_use_optimistic_addr(dev_net(dev), idev)) { |
7fd2561e EK |
3863 | /* Because optimistic nodes can use this address, |
3864 | * notify listeners. If DAD fails, RTM_DELADDR is sent. | |
3865 | */ | |
16186a82 | 3866 | notify = true; |
7fd2561e EK |
3867 | } |
3868 | } | |
95c385b4 | 3869 | |
6732bade | 3870 | addrconf_dad_kick(ifp); |
1da177e4 | 3871 | out: |
622ccdf1 | 3872 | spin_unlock(&ifp->lock); |
1da177e4 | 3873 | read_unlock_bh(&idev->lock); |
16186a82 SAK |
3874 | if (notify) |
3875 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
1da177e4 LT |
3876 | } |
3877 | ||
c15b1cca | 3878 | static void addrconf_dad_start(struct inet6_ifaddr *ifp) |
1da177e4 | 3879 | { |
c15b1cca HFS |
3880 | bool begin_dad = false; |
3881 | ||
8e8e676d | 3882 | spin_lock_bh(&ifp->lock); |
c15b1cca HFS |
3883 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
3884 | ifp->state = INET6_IFADDR_STATE_PREDAD; | |
3885 | begin_dad = true; | |
3886 | } | |
8e8e676d | 3887 | spin_unlock_bh(&ifp->lock); |
c15b1cca HFS |
3888 | |
3889 | if (begin_dad) | |
3890 | addrconf_mod_dad_work(ifp, 0); | |
3891 | } | |
3892 | ||
3893 | static void addrconf_dad_work(struct work_struct *w) | |
3894 | { | |
3895 | struct inet6_ifaddr *ifp = container_of(to_delayed_work(w), | |
3896 | struct inet6_ifaddr, | |
3897 | dad_work); | |
1da177e4 | 3898 | struct inet6_dev *idev = ifp->idev; |
764d3be6 | 3899 | bool bump_id, disable_ipv6 = false; |
1da177e4 LT |
3900 | struct in6_addr mcaddr; |
3901 | ||
c15b1cca HFS |
3902 | enum { |
3903 | DAD_PROCESS, | |
3904 | DAD_BEGIN, | |
3905 | DAD_ABORT, | |
3906 | } action = DAD_PROCESS; | |
3907 | ||
3908 | rtnl_lock(); | |
3909 | ||
8e8e676d | 3910 | spin_lock_bh(&ifp->lock); |
c15b1cca HFS |
3911 | if (ifp->state == INET6_IFADDR_STATE_PREDAD) { |
3912 | action = DAD_BEGIN; | |
3913 | ifp->state = INET6_IFADDR_STATE_DAD; | |
3914 | } else if (ifp->state == INET6_IFADDR_STATE_ERRDAD) { | |
3915 | action = DAD_ABORT; | |
3916 | ifp->state = INET6_IFADDR_STATE_POSTDAD; | |
85b51b12 | 3917 | |
35e015e1 MC |
3918 | if ((dev_net(idev->dev)->ipv6.devconf_all->accept_dad > 1 || |
3919 | idev->cnf.accept_dad > 1) && | |
3920 | !idev->cnf.disable_ipv6 && | |
85b51b12 MM |
3921 | !(ifp->flags & IFA_F_STABLE_PRIVACY)) { |
3922 | struct in6_addr addr; | |
3923 | ||
3924 | addr.s6_addr32[0] = htonl(0xfe800000); | |
3925 | addr.s6_addr32[1] = 0; | |
3926 | ||
3927 | if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && | |
3928 | ipv6_addr_equal(&ifp->addr, &addr)) { | |
3929 | /* DAD failed for link-local based on MAC */ | |
3930 | idev->cnf.disable_ipv6 = 1; | |
3931 | ||
3932 | pr_info("%s: IPv6 being disabled!\n", | |
3933 | ifp->idev->dev->name); | |
3934 | disable_ipv6 = true; | |
3935 | } | |
3936 | } | |
c15b1cca | 3937 | } |
8e8e676d | 3938 | spin_unlock_bh(&ifp->lock); |
c15b1cca HFS |
3939 | |
3940 | if (action == DAD_BEGIN) { | |
3941 | addrconf_dad_begin(ifp); | |
3942 | goto out; | |
3943 | } else if (action == DAD_ABORT) { | |
751eb6b6 | 3944 | in6_ifa_hold(ifp); |
c15b1cca | 3945 | addrconf_dad_stop(ifp, 1); |
85b51b12 MM |
3946 | if (disable_ipv6) |
3947 | addrconf_ifdown(idev->dev, 0); | |
c15b1cca HFS |
3948 | goto out; |
3949 | } | |
3950 | ||
b7b1bfce | 3951 | if (!ifp->dad_probes && addrconf_dad_end(ifp)) |
f2344a13 HX |
3952 | goto out; |
3953 | ||
c15b1cca | 3954 | write_lock_bh(&idev->lock); |
122e4519 | 3955 | if (idev->dead || !(idev->if_flags & IF_READY)) { |
c15b1cca | 3956 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
3957 | goto out; |
3958 | } | |
21809faf | 3959 | |
3960 | spin_lock(&ifp->lock); | |
622ccdf1 HX |
3961 | if (ifp->state == INET6_IFADDR_STATE_DEAD) { |
3962 | spin_unlock(&ifp->lock); | |
c15b1cca | 3963 | write_unlock_bh(&idev->lock); |
622ccdf1 HX |
3964 | goto out; |
3965 | } | |
3966 | ||
b7b1bfce | 3967 | if (ifp->dad_probes == 0) { |
07ca93e3 DA |
3968 | bool send_na = false; |
3969 | ||
1da177e4 LT |
3970 | /* |
3971 | * DAD was successful | |
3972 | */ | |
3973 | ||
07ca93e3 DA |
3974 | if (ifp->flags & IFA_F_TENTATIVE && |
3975 | !(ifp->flags & IFA_F_OPTIMISTIC)) | |
3976 | send_na = true; | |
764d3be6 | 3977 | bump_id = ifp->flags & IFA_F_TENTATIVE; |
cc411d0b | 3978 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 3979 | spin_unlock(&ifp->lock); |
c15b1cca | 3980 | write_unlock_bh(&idev->lock); |
1da177e4 | 3981 | |
07ca93e3 | 3982 | addrconf_dad_completed(ifp, bump_id, send_na); |
1da177e4 LT |
3983 | |
3984 | goto out; | |
3985 | } | |
3986 | ||
b7b1bfce | 3987 | ifp->dad_probes--; |
c15b1cca HFS |
3988 | addrconf_mod_dad_work(ifp, |
3989 | NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME)); | |
21809faf | 3990 | spin_unlock(&ifp->lock); |
c15b1cca | 3991 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
3992 | |
3993 | /* send a neighbour solicitation for our addr */ | |
1da177e4 | 3994 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
adc176c5 EN |
3995 | ndisc_send_ns(ifp->idev->dev, &ifp->addr, &mcaddr, &in6addr_any, |
3996 | ifp->dad_nonce); | |
1da177e4 LT |
3997 | out: |
3998 | in6_ifa_put(ifp); | |
c15b1cca | 3999 | rtnl_unlock(); |
1da177e4 LT |
4000 | } |
4001 | ||
11ffff75 HFS |
4002 | /* ifp->idev must be at least read locked */ |
4003 | static bool ipv6_lonely_lladdr(struct inet6_ifaddr *ifp) | |
4004 | { | |
4005 | struct inet6_ifaddr *ifpiter; | |
4006 | struct inet6_dev *idev = ifp->idev; | |
4007 | ||
602582ca HFS |
4008 | list_for_each_entry_reverse(ifpiter, &idev->addr_list, if_list) { |
4009 | if (ifpiter->scope > IFA_LINK) | |
4010 | break; | |
11ffff75 HFS |
4011 | if (ifp != ifpiter && ifpiter->scope == IFA_LINK && |
4012 | (ifpiter->flags & (IFA_F_PERMANENT|IFA_F_TENTATIVE| | |
4013 | IFA_F_OPTIMISTIC|IFA_F_DADFAILED)) == | |
4014 | IFA_F_PERMANENT) | |
4015 | return false; | |
4016 | } | |
4017 | return true; | |
4018 | } | |
4019 | ||
07ca93e3 DA |
4020 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp, bool bump_id, |
4021 | bool send_na) | |
1da177e4 | 4022 | { |
e21e8467 | 4023 | struct net_device *dev = ifp->idev->dev; |
b7b1bfce | 4024 | struct in6_addr lladdr; |
b173ee48 | 4025 | bool send_rs, send_mld; |
b7b1bfce | 4026 | |
c15b1cca | 4027 | addrconf_del_dad_work(ifp); |
1da177e4 LT |
4028 | |
4029 | /* | |
4030 | * Configure the address for reception. Now it is valid. | |
4031 | */ | |
4032 | ||
4033 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
4034 | ||
026359bc TA |
4035 | /* If added prefix is link local and we are prepared to process |
4036 | router advertisements, start sending router solicitations. | |
1da177e4 LT |
4037 | */ |
4038 | ||
1ec047eb | 4039 | read_lock_bh(&ifp->idev->lock); |
11ffff75 | 4040 | send_mld = ifp->scope == IFA_LINK && ipv6_lonely_lladdr(ifp); |
b173ee48 HFS |
4041 | send_rs = send_mld && |
4042 | ipv6_accept_ra(ifp->idev) && | |
bd11f074 | 4043 | ifp->idev->cnf.rtr_solicits != 0 && |
b173ee48 | 4044 | (dev->flags&IFF_LOOPBACK) == 0; |
1ec047eb HFS |
4045 | read_unlock_bh(&ifp->idev->lock); |
4046 | ||
b173ee48 HFS |
4047 | /* While dad is in progress mld report's source address is in6_addrany. |
4048 | * Resend with proper ll now. | |
4049 | */ | |
4050 | if (send_mld) | |
4051 | ipv6_mc_dad_complete(ifp->idev); | |
4052 | ||
07ca93e3 DA |
4053 | /* send unsolicited NA if enabled */ |
4054 | if (send_na && | |
4055 | (ifp->idev->cnf.ndisc_notify || | |
4056 | dev_net(dev)->ipv6.devconf_all->ndisc_notify)) { | |
4057 | ndisc_send_na(dev, &in6addr_linklocal_allnodes, &ifp->addr, | |
4058 | /*router=*/ !!ifp->idev->cnf.forwarding, | |
4059 | /*solicited=*/ false, /*override=*/ true, | |
4060 | /*inc_opt=*/ true); | |
4061 | } | |
4062 | ||
1ec047eb | 4063 | if (send_rs) { |
1da177e4 LT |
4064 | /* |
4065 | * If a host as already performed a random delay | |
4066 | * [...] as part of DAD [...] there is no need | |
4067 | * to delay again before sending the first RS | |
4068 | */ | |
1ec047eb | 4069 | if (ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) |
b7b1bfce | 4070 | return; |
1ec047eb | 4071 | ndisc_send_rs(dev, &lladdr, &in6addr_linklocal_allrouters); |
1da177e4 | 4072 | |
b7b1bfce HFS |
4073 | write_lock_bh(&ifp->idev->lock); |
4074 | spin_lock(&ifp->lock); | |
bd11f074 MŻ |
4075 | ifp->idev->rs_interval = rfc3315_s14_backoff_init( |
4076 | ifp->idev->cnf.rtr_solicit_interval); | |
b7b1bfce | 4077 | ifp->idev->rs_probes = 1; |
1da177e4 | 4078 | ifp->idev->if_flags |= IF_RS_SENT; |
bd11f074 | 4079 | addrconf_mod_rs_timer(ifp->idev, ifp->idev->rs_interval); |
b7b1bfce HFS |
4080 | spin_unlock(&ifp->lock); |
4081 | write_unlock_bh(&ifp->idev->lock); | |
1da177e4 | 4082 | } |
764d3be6 PA |
4083 | |
4084 | if (bump_id) | |
4085 | rt_genid_bump_ipv6(dev_net(dev)); | |
a11a7f71 MH |
4086 | |
4087 | /* Make sure that a new temporary address will be created | |
4088 | * before this temporary address becomes deprecated. | |
4089 | */ | |
4090 | if (ifp->flags & IFA_F_TEMPORARY) | |
4091 | addrconf_verify_rtnl(); | |
1da177e4 LT |
4092 | } |
4093 | ||
e21e8467 SH |
4094 | static void addrconf_dad_run(struct inet6_dev *idev) |
4095 | { | |
c5e33bdd YH |
4096 | struct inet6_ifaddr *ifp; |
4097 | ||
4098 | read_lock_bh(&idev->lock); | |
502a2ffd | 4099 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
21809faf | 4100 | spin_lock(&ifp->lock); |
f2344a13 HX |
4101 | if (ifp->flags & IFA_F_TENTATIVE && |
4102 | ifp->state == INET6_IFADDR_STATE_DAD) | |
4103 | addrconf_dad_kick(ifp); | |
21809faf | 4104 | spin_unlock(&ifp->lock); |
c5e33bdd YH |
4105 | } |
4106 | read_unlock_bh(&idev->lock); | |
4107 | } | |
4108 | ||
1da177e4 LT |
4109 | #ifdef CONFIG_PROC_FS |
4110 | struct if6_iter_state { | |
3c40090a | 4111 | struct seq_net_private p; |
1da177e4 | 4112 | int bucket; |
1d578303 | 4113 | int offset; |
1da177e4 LT |
4114 | }; |
4115 | ||
1d578303 | 4116 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos) |
1da177e4 LT |
4117 | { |
4118 | struct inet6_ifaddr *ifa = NULL; | |
4119 | struct if6_iter_state *state = seq->private; | |
1218854a | 4120 | struct net *net = seq_file_net(seq); |
1d578303 | 4121 | int p = 0; |
1da177e4 | 4122 | |
1d578303 MM |
4123 | /* initial bucket if pos is 0 */ |
4124 | if (pos == 0) { | |
4125 | state->bucket = 0; | |
4126 | state->offset = 0; | |
4127 | } | |
4128 | ||
4129 | for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
b67bfe0d | 4130 | hlist_for_each_entry_rcu_bh(ifa, &inet6_addr_lst[state->bucket], |
1d578303 | 4131 | addr_lst) { |
9f0d3c27 ED |
4132 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
4133 | continue; | |
1d578303 MM |
4134 | /* sync with offset */ |
4135 | if (p < state->offset) { | |
4136 | p++; | |
4137 | continue; | |
4138 | } | |
4139 | state->offset++; | |
9f0d3c27 | 4140 | return ifa; |
1d578303 MM |
4141 | } |
4142 | ||
4143 | /* prepare for next bucket */ | |
4144 | state->offset = 0; | |
4145 | p = 0; | |
1da177e4 | 4146 | } |
c2e21293 | 4147 | return NULL; |
1da177e4 LT |
4148 | } |
4149 | ||
c2e21293 | 4150 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, |
4151 | struct inet6_ifaddr *ifa) | |
1da177e4 LT |
4152 | { |
4153 | struct if6_iter_state *state = seq->private; | |
1218854a | 4154 | struct net *net = seq_file_net(seq); |
1da177e4 | 4155 | |
b67bfe0d | 4156 | hlist_for_each_entry_continue_rcu_bh(ifa, addr_lst) { |
9f0d3c27 ED |
4157 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
4158 | continue; | |
1d578303 | 4159 | state->offset++; |
9f0d3c27 | 4160 | return ifa; |
1d578303 | 4161 | } |
3c40090a | 4162 | |
c2e21293 | 4163 | while (++state->bucket < IN6_ADDR_HSIZE) { |
1d578303 | 4164 | state->offset = 0; |
b67bfe0d | 4165 | hlist_for_each_entry_rcu_bh(ifa, |
c2e21293 | 4166 | &inet6_addr_lst[state->bucket], addr_lst) { |
9f0d3c27 ED |
4167 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
4168 | continue; | |
1d578303 | 4169 | state->offset++; |
9f0d3c27 | 4170 | return ifa; |
c2e21293 | 4171 | } |
1da177e4 | 4172 | } |
3c40090a | 4173 | |
c2e21293 | 4174 | return NULL; |
1da177e4 LT |
4175 | } |
4176 | ||
1da177e4 | 4177 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) |
4f70ecca | 4178 | __acquires(rcu_bh) |
1da177e4 | 4179 | { |
5c578aed | 4180 | rcu_read_lock_bh(); |
1d578303 | 4181 | return if6_get_first(seq, *pos); |
1da177e4 LT |
4182 | } |
4183 | ||
4184 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
4185 | { | |
4186 | struct inet6_ifaddr *ifa; | |
4187 | ||
4188 | ifa = if6_get_next(seq, v); | |
4189 | ++*pos; | |
4190 | return ifa; | |
4191 | } | |
4192 | ||
4193 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
4f70ecca | 4194 | __releases(rcu_bh) |
1da177e4 | 4195 | { |
5c578aed | 4196 | rcu_read_unlock_bh(); |
1da177e4 LT |
4197 | } |
4198 | ||
4199 | static int if6_seq_show(struct seq_file *seq, void *v) | |
4200 | { | |
4201 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
971a351c | 4202 | seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", |
b071195d | 4203 | &ifp->addr, |
1da177e4 LT |
4204 | ifp->idev->dev->ifindex, |
4205 | ifp->prefix_len, | |
4206 | ifp->scope, | |
971a351c | 4207 | (u8) ifp->flags, |
1da177e4 LT |
4208 | ifp->idev->dev->name); |
4209 | return 0; | |
4210 | } | |
4211 | ||
56b3d975 | 4212 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
4213 | .start = if6_seq_start, |
4214 | .next = if6_seq_next, | |
4215 | .show = if6_seq_show, | |
4216 | .stop = if6_seq_stop, | |
4217 | }; | |
4218 | ||
4219 | static int if6_seq_open(struct inode *inode, struct file *file) | |
4220 | { | |
3c40090a DL |
4221 | return seq_open_net(inode, file, &if6_seq_ops, |
4222 | sizeof(struct if6_iter_state)); | |
1da177e4 LT |
4223 | } |
4224 | ||
9a32144e | 4225 | static const struct file_operations if6_fops = { |
1da177e4 LT |
4226 | .owner = THIS_MODULE, |
4227 | .open = if6_seq_open, | |
4228 | .read = seq_read, | |
4229 | .llseek = seq_lseek, | |
3c40090a | 4230 | .release = seq_release_net, |
1da177e4 LT |
4231 | }; |
4232 | ||
2c8c1e72 | 4233 | static int __net_init if6_proc_net_init(struct net *net) |
1da177e4 | 4234 | { |
d4beaa66 | 4235 | if (!proc_create("if_inet6", S_IRUGO, net->proc_net, &if6_fops)) |
1da177e4 LT |
4236 | return -ENOMEM; |
4237 | return 0; | |
4238 | } | |
4239 | ||
2c8c1e72 | 4240 | static void __net_exit if6_proc_net_exit(struct net *net) |
3c40090a | 4241 | { |
ece31ffd | 4242 | remove_proc_entry("if_inet6", net->proc_net); |
3c40090a DL |
4243 | } |
4244 | ||
4245 | static struct pernet_operations if6_proc_net_ops = { | |
67ba4152 IM |
4246 | .init = if6_proc_net_init, |
4247 | .exit = if6_proc_net_exit, | |
3c40090a DL |
4248 | }; |
4249 | ||
4250 | int __init if6_proc_init(void) | |
4251 | { | |
4252 | return register_pernet_subsys(&if6_proc_net_ops); | |
4253 | } | |
4254 | ||
1da177e4 LT |
4255 | void if6_proc_exit(void) |
4256 | { | |
3c40090a | 4257 | unregister_pernet_subsys(&if6_proc_net_ops); |
1da177e4 LT |
4258 | } |
4259 | #endif /* CONFIG_PROC_FS */ | |
4260 | ||
07a93626 | 4261 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
3b9f9a1c | 4262 | /* Check if address is a home address configured on any interface. */ |
b71d1d42 | 4263 | int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr) |
3b9f9a1c NT |
4264 | { |
4265 | int ret = 0; | |
c2e21293 | 4266 | struct inet6_ifaddr *ifp = NULL; |
ddbe5032 | 4267 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 4268 | |
5c578aed | 4269 | rcu_read_lock_bh(); |
b67bfe0d | 4270 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 4271 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
389f6612 | 4272 | continue; |
caad295f | 4273 | if (ipv6_addr_equal(&ifp->addr, addr) && |
3b9f9a1c NT |
4274 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
4275 | ret = 1; | |
4276 | break; | |
4277 | } | |
4278 | } | |
5c578aed | 4279 | rcu_read_unlock_bh(); |
3b9f9a1c NT |
4280 | return ret; |
4281 | } | |
4282 | #endif | |
4283 | ||
1da177e4 LT |
4284 | /* |
4285 | * Periodic address status verification | |
4286 | */ | |
4287 | ||
c15b1cca | 4288 | static void addrconf_verify_rtnl(void) |
1da177e4 | 4289 | { |
b2db7564 | 4290 | unsigned long now, next, next_sec, next_sched; |
1da177e4 | 4291 | struct inet6_ifaddr *ifp; |
1da177e4 LT |
4292 | int i; |
4293 | ||
c15b1cca HFS |
4294 | ASSERT_RTNL(); |
4295 | ||
5c578aed | 4296 | rcu_read_lock_bh(); |
1da177e4 | 4297 | now = jiffies; |
b2db7564 | 4298 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); |
1da177e4 | 4299 | |
c15b1cca | 4300 | cancel_delayed_work(&addr_chk_work); |
1da177e4 | 4301 | |
bcdd553f | 4302 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
1da177e4 | 4303 | restart: |
c15b1cca | 4304 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[i], addr_lst) { |
1da177e4 | 4305 | unsigned long age; |
1da177e4 | 4306 | |
fad8da3e YA |
4307 | /* When setting preferred_lft to a value not zero or |
4308 | * infinity, while valid_lft is infinity | |
4309 | * IFA_F_PERMANENT has a non-infinity life time. | |
4310 | */ | |
4311 | if ((ifp->flags & IFA_F_PERMANENT) && | |
4312 | (ifp->prefered_lft == INFINITY_LIFE_TIME)) | |
1da177e4 LT |
4313 | continue; |
4314 | ||
4315 | spin_lock(&ifp->lock); | |
b2db7564 YH |
4316 | /* We try to batch several events at once. */ |
4317 | age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; | |
1da177e4 | 4318 | |
8f27ebb9 YH |
4319 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
4320 | age >= ifp->valid_lft) { | |
1da177e4 LT |
4321 | spin_unlock(&ifp->lock); |
4322 | in6_ifa_hold(ifp); | |
1da177e4 LT |
4323 | ipv6_del_addr(ifp); |
4324 | goto restart; | |
8f27ebb9 YH |
4325 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
4326 | spin_unlock(&ifp->lock); | |
4327 | continue; | |
1da177e4 | 4328 | } else if (age >= ifp->prefered_lft) { |
a1ed0526 | 4329 | /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ |
1da177e4 LT |
4330 | int deprecate = 0; |
4331 | ||
4332 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
4333 | deprecate = 1; | |
4334 | ifp->flags |= IFA_F_DEPRECATED; | |
4335 | } | |
4336 | ||
fad8da3e YA |
4337 | if ((ifp->valid_lft != INFINITY_LIFE_TIME) && |
4338 | (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))) | |
1da177e4 LT |
4339 | next = ifp->tstamp + ifp->valid_lft * HZ; |
4340 | ||
4341 | spin_unlock(&ifp->lock); | |
4342 | ||
4343 | if (deprecate) { | |
4344 | in6_ifa_hold(ifp); | |
1da177e4 LT |
4345 | |
4346 | ipv6_ifa_notify(0, ifp); | |
4347 | in6_ifa_put(ifp); | |
4348 | goto restart; | |
4349 | } | |
1da177e4 LT |
4350 | } else if ((ifp->flags&IFA_F_TEMPORARY) && |
4351 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
88949cf4 | 4352 | unsigned long regen_advance = ifp->idev->cnf.regen_max_retry * |
4353 | ifp->idev->cnf.dad_transmits * | |
1f9248e5 | 4354 | NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME) / HZ; |
88949cf4 | 4355 | |
1da177e4 LT |
4356 | if (age >= ifp->prefered_lft - regen_advance) { |
4357 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
4358 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
4359 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
4360 | if (!ifp->regen_count && ifpub) { | |
4361 | ifp->regen_count++; | |
4362 | in6_ifa_hold(ifp); | |
4363 | in6_ifa_hold(ifpub); | |
4364 | spin_unlock(&ifp->lock); | |
5c578aed | 4365 | |
291d809b HY |
4366 | spin_lock(&ifpub->lock); |
4367 | ifpub->regen_count = 0; | |
4368 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
4369 | ipv6_create_tempaddr(ifpub, ifp); |
4370 | in6_ifa_put(ifpub); | |
4371 | in6_ifa_put(ifp); | |
4372 | goto restart; | |
4373 | } | |
4374 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
4375 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
4376 | spin_unlock(&ifp->lock); | |
1da177e4 LT |
4377 | } else { |
4378 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
4379 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
4380 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
4381 | spin_unlock(&ifp->lock); | |
4382 | } | |
4383 | } | |
1da177e4 LT |
4384 | } |
4385 | ||
b2db7564 YH |
4386 | next_sec = round_jiffies_up(next); |
4387 | next_sched = next; | |
4388 | ||
4389 | /* If rounded timeout is accurate enough, accept it. */ | |
4390 | if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) | |
4391 | next_sched = next_sec; | |
4392 | ||
4393 | /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ | |
4394 | if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX)) | |
4395 | next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX; | |
4396 | ||
ba3542e1 | 4397 | ADBG(KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n", |
4398 | now, next, next_sec, next_sched); | |
c15b1cca | 4399 | mod_delayed_work(addrconf_wq, &addr_chk_work, next_sched - now); |
5c578aed | 4400 | rcu_read_unlock_bh(); |
1da177e4 LT |
4401 | } |
4402 | ||
c15b1cca HFS |
4403 | static void addrconf_verify_work(struct work_struct *w) |
4404 | { | |
4405 | rtnl_lock(); | |
4406 | addrconf_verify_rtnl(); | |
4407 | rtnl_unlock(); | |
4408 | } | |
4409 | ||
4410 | static void addrconf_verify(void) | |
4411 | { | |
4412 | mod_delayed_work(addrconf_wq, &addr_chk_work, 0); | |
4413 | } | |
4414 | ||
caeaba79 ND |
4415 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local, |
4416 | struct in6_addr **peer_pfx) | |
461d8837 TG |
4417 | { |
4418 | struct in6_addr *pfx = NULL; | |
4419 | ||
caeaba79 ND |
4420 | *peer_pfx = NULL; |
4421 | ||
461d8837 TG |
4422 | if (addr) |
4423 | pfx = nla_data(addr); | |
4424 | ||
4425 | if (local) { | |
4426 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
caeaba79 ND |
4427 | *peer_pfx = pfx; |
4428 | pfx = nla_data(local); | |
461d8837 TG |
4429 | } |
4430 | ||
4431 | return pfx; | |
4432 | } | |
4433 | ||
ef7c79ed | 4434 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
4435 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
4436 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
4437 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
479840ff | 4438 | [IFA_FLAGS] = { .len = sizeof(u32) }, |
461d8837 TG |
4439 | }; |
4440 | ||
1da177e4 | 4441 | static int |
c21ef3e3 DA |
4442 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, |
4443 | struct netlink_ext_ack *extack) | |
1da177e4 | 4444 | { |
3b1e0a65 | 4445 | struct net *net = sock_net(skb->sk); |
b933f716 TG |
4446 | struct ifaddrmsg *ifm; |
4447 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 4448 | struct in6_addr *pfx, *peer_pfx; |
6046d5b4 | 4449 | u32 ifa_flags; |
b933f716 | 4450 | int err; |
1da177e4 | 4451 | |
fceb6435 | 4452 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy, |
c21ef3e3 | 4453 | extack); |
b933f716 TG |
4454 | if (err < 0) |
4455 | return err; | |
4456 | ||
4457 | ifm = nlmsg_data(nlh); | |
caeaba79 | 4458 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
63159f29 | 4459 | if (!pfx) |
1da177e4 LT |
4460 | return -EINVAL; |
4461 | ||
6046d5b4 HK |
4462 | ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags; |
4463 | ||
4464 | /* We ignore other flags so far. */ | |
4465 | ifa_flags &= IFA_F_MANAGETEMPADDR; | |
4466 | ||
4467 | return inet6_addr_del(net, ifm->ifa_index, ifa_flags, pfx, | |
4468 | ifm->ifa_prefixlen); | |
1da177e4 LT |
4469 | } |
4470 | ||
479840ff | 4471 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u32 ifa_flags, |
55ebaef1 | 4472 | u32 prefered_lft, u32 valid_lft) |
081bba5b | 4473 | { |
6f704992 YH |
4474 | u32 flags; |
4475 | clock_t expires; | |
4bed72e4 | 4476 | unsigned long timeout; |
53bd6749 | 4477 | bool was_managetempaddr; |
5b84efec | 4478 | bool had_prefixroute; |
46d48046 | 4479 | |
c15b1cca HFS |
4480 | ASSERT_RTNL(); |
4481 | ||
081bba5b NT |
4482 | if (!valid_lft || (prefered_lft > valid_lft)) |
4483 | return -EINVAL; | |
4484 | ||
53bd6749 JP |
4485 | if (ifa_flags & IFA_F_MANAGETEMPADDR && |
4486 | (ifp->flags & IFA_F_TEMPORARY || ifp->prefix_len != 64)) | |
4487 | return -EINVAL; | |
4488 | ||
4bed72e4 YH |
4489 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
4490 | if (addrconf_finite_timeout(timeout)) { | |
4491 | expires = jiffies_to_clock_t(timeout * HZ); | |
4492 | valid_lft = timeout; | |
6f704992 | 4493 | flags = RTF_EXPIRES; |
4bed72e4 YH |
4494 | } else { |
4495 | expires = 0; | |
4496 | flags = 0; | |
4497 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 4498 | } |
081bba5b | 4499 | |
4bed72e4 YH |
4500 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
4501 | if (addrconf_finite_timeout(timeout)) { | |
4502 | if (timeout == 0) | |
4503 | ifa_flags |= IFA_F_DEPRECATED; | |
4504 | prefered_lft = timeout; | |
4505 | } | |
081bba5b NT |
4506 | |
4507 | spin_lock_bh(&ifp->lock); | |
53bd6749 | 4508 | was_managetempaddr = ifp->flags & IFA_F_MANAGETEMPADDR; |
5b84efec TH |
4509 | had_prefixroute = ifp->flags & IFA_F_PERMANENT && |
4510 | !(ifp->flags & IFA_F_NOPREFIXROUTE); | |
53bd6749 | 4511 | ifp->flags &= ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | |
761aac73 TH |
4512 | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR | |
4513 | IFA_F_NOPREFIXROUTE); | |
53bd6749 | 4514 | ifp->flags |= ifa_flags; |
081bba5b NT |
4515 | ifp->tstamp = jiffies; |
4516 | ifp->valid_lft = valid_lft; | |
4517 | ifp->prefered_lft = prefered_lft; | |
4518 | ||
4519 | spin_unlock_bh(&ifp->lock); | |
4520 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
4521 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 4522 | |
761aac73 TH |
4523 | if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) { |
4524 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, | |
4525 | expires, flags); | |
5b84efec TH |
4526 | } else if (had_prefixroute) { |
4527 | enum cleanup_prefix_rt_t action; | |
4528 | unsigned long rt_expires; | |
4529 | ||
4530 | write_lock_bh(&ifp->idev->lock); | |
4531 | action = check_cleanup_prefix_route(ifp, &rt_expires); | |
4532 | write_unlock_bh(&ifp->idev->lock); | |
4533 | ||
4534 | if (action != CLEANUP_PREFIX_RT_NOP) { | |
4535 | cleanup_prefix_route(ifp, rt_expires, | |
4536 | action == CLEANUP_PREFIX_RT_DEL); | |
4537 | } | |
761aac73 | 4538 | } |
53bd6749 JP |
4539 | |
4540 | if (was_managetempaddr || ifp->flags & IFA_F_MANAGETEMPADDR) { | |
4541 | if (was_managetempaddr && !(ifp->flags & IFA_F_MANAGETEMPADDR)) | |
4542 | valid_lft = prefered_lft = 0; | |
4543 | manage_tempaddrs(ifp->idev, ifp, valid_lft, prefered_lft, | |
4544 | !was_managetempaddr, jiffies); | |
4545 | } | |
4546 | ||
c15b1cca | 4547 | addrconf_verify_rtnl(); |
081bba5b NT |
4548 | |
4549 | return 0; | |
4550 | } | |
4551 | ||
1da177e4 | 4552 | static int |
c21ef3e3 DA |
4553 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, |
4554 | struct netlink_ext_ack *extack) | |
1da177e4 | 4555 | { |
3b1e0a65 | 4556 | struct net *net = sock_net(skb->sk); |
461d8837 TG |
4557 | struct ifaddrmsg *ifm; |
4558 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 4559 | struct in6_addr *pfx, *peer_pfx; |
7198f8ce TG |
4560 | struct inet6_ifaddr *ifa; |
4561 | struct net_device *dev; | |
55ebaef1 | 4562 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
479840ff | 4563 | u32 ifa_flags; |
461d8837 | 4564 | int err; |
1da177e4 | 4565 | |
fceb6435 | 4566 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy, |
c21ef3e3 | 4567 | extack); |
461d8837 TG |
4568 | if (err < 0) |
4569 | return err; | |
4570 | ||
4571 | ifm = nlmsg_data(nlh); | |
caeaba79 | 4572 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
63159f29 | 4573 | if (!pfx) |
1da177e4 LT |
4574 | return -EINVAL; |
4575 | ||
461d8837 | 4576 | if (tb[IFA_CACHEINFO]) { |
0778769d | 4577 | struct ifa_cacheinfo *ci; |
461d8837 TG |
4578 | |
4579 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 4580 | valid_lft = ci->ifa_valid; |
461d8837 TG |
4581 | preferred_lft = ci->ifa_prefered; |
4582 | } else { | |
4583 | preferred_lft = INFINITY_LIFE_TIME; | |
4584 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
4585 | } |
4586 | ||
af284937 | 4587 | dev = __dev_get_by_index(net, ifm->ifa_index); |
63159f29 | 4588 | if (!dev) |
7198f8ce TG |
4589 | return -ENODEV; |
4590 | ||
479840ff JP |
4591 | ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags; |
4592 | ||
55ebaef1 | 4593 | /* We ignore other flags so far. */ |
761aac73 | 4594 | ifa_flags &= IFA_F_NODAD | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR | |
93a714d6 | 4595 | IFA_F_NOPREFIXROUTE | IFA_F_MCAUTOJOIN; |
55ebaef1 | 4596 | |
1cab3da6 | 4597 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
63159f29 | 4598 | if (!ifa) { |
7198f8ce TG |
4599 | /* |
4600 | * It would be best to check for !NLM_F_CREATE here but | |
db9c7c39 | 4601 | * userspace already relies on not having to provide this. |
7198f8ce | 4602 | */ |
caeaba79 | 4603 | return inet6_addr_add(net, ifm->ifa_index, pfx, peer_pfx, |
af284937 DL |
4604 | ifm->ifa_prefixlen, ifa_flags, |
4605 | preferred_lft, valid_lft); | |
081bba5b NT |
4606 | } |
4607 | ||
7198f8ce TG |
4608 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
4609 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
4610 | err = -EEXIST; | |
4611 | else | |
55ebaef1 | 4612 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
4613 | |
4614 | in6_ifa_put(ifa); | |
4615 | ||
4616 | return err; | |
1da177e4 LT |
4617 | } |
4618 | ||
479840ff | 4619 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u32 flags, |
101bb229 TG |
4620 | u8 scope, int ifindex) |
4621 | { | |
4622 | struct ifaddrmsg *ifm; | |
4623 | ||
4624 | ifm = nlmsg_data(nlh); | |
4625 | ifm->ifa_family = AF_INET6; | |
4626 | ifm->ifa_prefixlen = prefixlen; | |
4627 | ifm->ifa_flags = flags; | |
4628 | ifm->ifa_scope = scope; | |
4629 | ifm->ifa_index = ifindex; | |
4630 | } | |
4631 | ||
85486af0 TG |
4632 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
4633 | unsigned long tstamp, u32 preferred, u32 valid) | |
4634 | { | |
4635 | struct ifa_cacheinfo ci; | |
4636 | ||
18a31e1e TG |
4637 | ci.cstamp = cstamp_delta(cstamp); |
4638 | ci.tstamp = cstamp_delta(tstamp); | |
85486af0 TG |
4639 | ci.ifa_prefered = preferred; |
4640 | ci.ifa_valid = valid; | |
4641 | ||
4642 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
4643 | } | |
4644 | ||
101bb229 TG |
4645 | static inline int rt_scope(int ifa_scope) |
4646 | { | |
4647 | if (ifa_scope & IFA_HOST) | |
4648 | return RT_SCOPE_HOST; | |
4649 | else if (ifa_scope & IFA_LINK) | |
4650 | return RT_SCOPE_LINK; | |
4651 | else if (ifa_scope & IFA_SITE) | |
4652 | return RT_SCOPE_SITE; | |
4653 | else | |
4654 | return RT_SCOPE_UNIVERSE; | |
4655 | } | |
4656 | ||
0ab6803b TG |
4657 | static inline int inet6_ifaddr_msgsize(void) |
4658 | { | |
339bf98f | 4659 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
caeaba79 | 4660 | + nla_total_size(16) /* IFA_LOCAL */ |
339bf98f | 4661 | + nla_total_size(16) /* IFA_ADDRESS */ |
479840ff JP |
4662 | + nla_total_size(sizeof(struct ifa_cacheinfo)) |
4663 | + nla_total_size(4) /* IFA_FLAGS */; | |
0ab6803b | 4664 | } |
c5396a31 | 4665 | |
1da177e4 | 4666 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
15e47304 | 4667 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4668 | { |
1da177e4 | 4669 | struct nlmsghdr *nlh; |
85486af0 | 4670 | u32 preferred, valid; |
1da177e4 | 4671 | |
15e47304 | 4672 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
63159f29 | 4673 | if (!nlh) |
26932566 | 4674 | return -EMSGSIZE; |
0ab6803b | 4675 | |
101bb229 TG |
4676 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
4677 | ifa->idev->dev->ifindex); | |
4678 | ||
fad8da3e YA |
4679 | if (!((ifa->flags&IFA_F_PERMANENT) && |
4680 | (ifa->prefered_lft == INFINITY_LIFE_TIME))) { | |
85486af0 TG |
4681 | preferred = ifa->prefered_lft; |
4682 | valid = ifa->valid_lft; | |
4683 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 4684 | long tval = (jiffies - ifa->tstamp)/HZ; |
a1faa698 JR |
4685 | if (preferred > tval) |
4686 | preferred -= tval; | |
4687 | else | |
4688 | preferred = 0; | |
f56619fc BH |
4689 | if (valid != INFINITY_LIFE_TIME) { |
4690 | if (valid > tval) | |
4691 | valid -= tval; | |
4692 | else | |
4693 | valid = 0; | |
4694 | } | |
1da177e4 LT |
4695 | } |
4696 | } else { | |
85486af0 TG |
4697 | preferred = INFINITY_LIFE_TIME; |
4698 | valid = INFINITY_LIFE_TIME; | |
4699 | } | |
4700 | ||
7996c799 | 4701 | if (!ipv6_addr_any(&ifa->peer_addr)) { |
930345ea JB |
4702 | if (nla_put_in6_addr(skb, IFA_LOCAL, &ifa->addr) < 0 || |
4703 | nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->peer_addr) < 0) | |
caeaba79 ND |
4704 | goto error; |
4705 | } else | |
930345ea | 4706 | if (nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->addr) < 0) |
caeaba79 ND |
4707 | goto error; |
4708 | ||
4709 | if (put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) | |
4710 | goto error; | |
1da177e4 | 4711 | |
479840ff JP |
4712 | if (nla_put_u32(skb, IFA_FLAGS, ifa->flags) < 0) |
4713 | goto error; | |
4714 | ||
053c095a JB |
4715 | nlmsg_end(skb, nlh); |
4716 | return 0; | |
caeaba79 ND |
4717 | |
4718 | error: | |
4719 | nlmsg_cancel(skb, nlh); | |
4720 | return -EMSGSIZE; | |
1da177e4 LT |
4721 | } |
4722 | ||
4723 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
15e47304 | 4724 | u32 portid, u32 seq, int event, u16 flags) |
1da177e4 | 4725 | { |
1da177e4 | 4726 | struct nlmsghdr *nlh; |
101bb229 TG |
4727 | u8 scope = RT_SCOPE_UNIVERSE; |
4728 | int ifindex = ifmca->idev->dev->ifindex; | |
4729 | ||
4730 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
4731 | scope = RT_SCOPE_SITE; | |
1da177e4 | 4732 | |
15e47304 | 4733 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
63159f29 | 4734 | if (!nlh) |
26932566 | 4735 | return -EMSGSIZE; |
85486af0 | 4736 | |
0ab6803b | 4737 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
930345ea | 4738 | if (nla_put_in6_addr(skb, IFA_MULTICAST, &ifmca->mca_addr) < 0 || |
0ab6803b | 4739 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, |
26932566 PM |
4740 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
4741 | nlmsg_cancel(skb, nlh); | |
4742 | return -EMSGSIZE; | |
4743 | } | |
85486af0 | 4744 | |
053c095a JB |
4745 | nlmsg_end(skb, nlh); |
4746 | return 0; | |
1da177e4 LT |
4747 | } |
4748 | ||
4749 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
15e47304 | 4750 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4751 | { |
1da177e4 | 4752 | struct nlmsghdr *nlh; |
101bb229 TG |
4753 | u8 scope = RT_SCOPE_UNIVERSE; |
4754 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
4755 | ||
4756 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
4757 | scope = RT_SCOPE_SITE; | |
1da177e4 | 4758 | |
15e47304 | 4759 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
63159f29 | 4760 | if (!nlh) |
26932566 | 4761 | return -EMSGSIZE; |
85486af0 | 4762 | |
0ab6803b | 4763 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
930345ea | 4764 | if (nla_put_in6_addr(skb, IFA_ANYCAST, &ifaca->aca_addr) < 0 || |
0ab6803b | 4765 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, |
26932566 PM |
4766 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
4767 | nlmsg_cancel(skb, nlh); | |
4768 | return -EMSGSIZE; | |
4769 | } | |
1da177e4 | 4770 | |
053c095a JB |
4771 | nlmsg_end(skb, nlh); |
4772 | return 0; | |
1da177e4 LT |
4773 | } |
4774 | ||
e21e8467 | 4775 | enum addr_type_t { |
1da177e4 LT |
4776 | UNICAST_ADDR, |
4777 | MULTICAST_ADDR, | |
4778 | ANYCAST_ADDR, | |
4779 | }; | |
4780 | ||
234b27c3 ED |
4781 | /* called with rcu_read_lock() */ |
4782 | static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb, | |
4783 | struct netlink_callback *cb, enum addr_type_t type, | |
4784 | int s_ip_idx, int *p_ip_idx) | |
4785 | { | |
234b27c3 ED |
4786 | struct ifmcaddr6 *ifmca; |
4787 | struct ifacaddr6 *ifaca; | |
4788 | int err = 1; | |
4789 | int ip_idx = *p_ip_idx; | |
4790 | ||
4791 | read_lock_bh(&idev->lock); | |
4792 | switch (type) { | |
502a2ffd | 4793 | case UNICAST_ADDR: { |
4794 | struct inet6_ifaddr *ifa; | |
4795 | ||
234b27c3 | 4796 | /* unicast address incl. temp addr */ |
502a2ffd | 4797 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
4798 | if (++ip_idx < s_ip_idx) | |
234b27c3 ED |
4799 | continue; |
4800 | err = inet6_fill_ifaddr(skb, ifa, | |
15e47304 | 4801 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4802 | cb->nlh->nlmsg_seq, |
4803 | RTM_NEWADDR, | |
4804 | NLM_F_MULTI); | |
053c095a | 4805 | if (err < 0) |
234b27c3 | 4806 | break; |
63998ac2 | 4807 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
234b27c3 ED |
4808 | } |
4809 | break; | |
502a2ffd | 4810 | } |
234b27c3 ED |
4811 | case MULTICAST_ADDR: |
4812 | /* multicast address */ | |
4813 | for (ifmca = idev->mc_list; ifmca; | |
4814 | ifmca = ifmca->next, ip_idx++) { | |
4815 | if (ip_idx < s_ip_idx) | |
4816 | continue; | |
4817 | err = inet6_fill_ifmcaddr(skb, ifmca, | |
15e47304 | 4818 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4819 | cb->nlh->nlmsg_seq, |
4820 | RTM_GETMULTICAST, | |
4821 | NLM_F_MULTI); | |
053c095a | 4822 | if (err < 0) |
234b27c3 ED |
4823 | break; |
4824 | } | |
4825 | break; | |
4826 | case ANYCAST_ADDR: | |
4827 | /* anycast address */ | |
4828 | for (ifaca = idev->ac_list; ifaca; | |
4829 | ifaca = ifaca->aca_next, ip_idx++) { | |
4830 | if (ip_idx < s_ip_idx) | |
4831 | continue; | |
4832 | err = inet6_fill_ifacaddr(skb, ifaca, | |
15e47304 | 4833 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4834 | cb->nlh->nlmsg_seq, |
4835 | RTM_GETANYCAST, | |
4836 | NLM_F_MULTI); | |
053c095a | 4837 | if (err < 0) |
234b27c3 ED |
4838 | break; |
4839 | } | |
4840 | break; | |
4841 | default: | |
4842 | break; | |
4843 | } | |
4844 | read_unlock_bh(&idev->lock); | |
4845 | *p_ip_idx = ip_idx; | |
4846 | return err; | |
4847 | } | |
4848 | ||
1da177e4 LT |
4849 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, |
4850 | enum addr_type_t type) | |
4851 | { | |
234b27c3 ED |
4852 | struct net *net = sock_net(skb->sk); |
4853 | int h, s_h; | |
1da177e4 LT |
4854 | int idx, ip_idx; |
4855 | int s_idx, s_ip_idx; | |
1da177e4 | 4856 | struct net_device *dev; |
234b27c3 ED |
4857 | struct inet6_dev *idev; |
4858 | struct hlist_head *head; | |
1ab1457c | 4859 | |
234b27c3 ED |
4860 | s_h = cb->args[0]; |
4861 | s_idx = idx = cb->args[1]; | |
4862 | s_ip_idx = ip_idx = cb->args[2]; | |
5d5619b4 | 4863 | |
234b27c3 | 4864 | rcu_read_lock(); |
63998ac2 | 4865 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ net->dev_base_seq; |
234b27c3 ED |
4866 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
4867 | idx = 0; | |
4868 | head = &net->dev_index_head[h]; | |
b67bfe0d | 4869 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
234b27c3 ED |
4870 | if (idx < s_idx) |
4871 | goto cont; | |
4b97efdf | 4872 | if (h > s_h || idx > s_idx) |
234b27c3 ED |
4873 | s_ip_idx = 0; |
4874 | ip_idx = 0; | |
e21e8467 SH |
4875 | idev = __in6_dev_get(dev); |
4876 | if (!idev) | |
234b27c3 ED |
4877 | goto cont; |
4878 | ||
4879 | if (in6_dump_addrs(idev, skb, cb, type, | |
7b46a644 | 4880 | s_ip_idx, &ip_idx) < 0) |
234b27c3 | 4881 | goto done; |
7562f876 | 4882 | cont: |
234b27c3 ED |
4883 | idx++; |
4884 | } | |
1da177e4 | 4885 | } |
234b27c3 ED |
4886 | done: |
4887 | rcu_read_unlock(); | |
4888 | cb->args[0] = h; | |
4889 | cb->args[1] = idx; | |
4890 | cb->args[2] = ip_idx; | |
4891 | ||
1da177e4 LT |
4892 | return skb->len; |
4893 | } | |
4894 | ||
4895 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4896 | { | |
4897 | enum addr_type_t type = UNICAST_ADDR; | |
b854272b | 4898 | |
1da177e4 LT |
4899 | return inet6_dump_addr(skb, cb, type); |
4900 | } | |
4901 | ||
4902 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4903 | { | |
4904 | enum addr_type_t type = MULTICAST_ADDR; | |
b854272b | 4905 | |
1da177e4 LT |
4906 | return inet6_dump_addr(skb, cb, type); |
4907 | } | |
4908 | ||
4909 | ||
4910 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4911 | { | |
4912 | enum addr_type_t type = ANYCAST_ADDR; | |
b854272b | 4913 | |
1da177e4 LT |
4914 | return inet6_dump_addr(skb, cb, type); |
4915 | } | |
4916 | ||
c21ef3e3 DA |
4917 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh, |
4918 | struct netlink_ext_ack *extack) | |
6c223828 | 4919 | { |
3b1e0a65 | 4920 | struct net *net = sock_net(in_skb->sk); |
1b29fc2c TG |
4921 | struct ifaddrmsg *ifm; |
4922 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 4923 | struct in6_addr *addr = NULL, *peer; |
6c223828 NT |
4924 | struct net_device *dev = NULL; |
4925 | struct inet6_ifaddr *ifa; | |
4926 | struct sk_buff *skb; | |
6c223828 NT |
4927 | int err; |
4928 | ||
fceb6435 | 4929 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy, |
c21ef3e3 | 4930 | extack); |
1b29fc2c TG |
4931 | if (err < 0) |
4932 | goto errout; | |
4933 | ||
caeaba79 | 4934 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer); |
63159f29 | 4935 | if (!addr) { |
1b29fc2c TG |
4936 | err = -EINVAL; |
4937 | goto errout; | |
6c223828 | 4938 | } |
6c223828 | 4939 | |
1b29fc2c | 4940 | ifm = nlmsg_data(nlh); |
6c223828 | 4941 | if (ifm->ifa_index) |
6fda7350 | 4942 | dev = __dev_get_by_index(net, ifm->ifa_index); |
6c223828 | 4943 | |
e21e8467 SH |
4944 | ifa = ipv6_get_ifaddr(net, addr, dev, 1); |
4945 | if (!ifa) { | |
1b29fc2c TG |
4946 | err = -EADDRNOTAVAIL; |
4947 | goto errout; | |
4948 | } | |
6c223828 | 4949 | |
e21e8467 SH |
4950 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL); |
4951 | if (!skb) { | |
6c223828 | 4952 | err = -ENOBUFS; |
1b29fc2c | 4953 | goto errout_ifa; |
6c223828 NT |
4954 | } |
4955 | ||
15e47304 | 4956 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).portid, |
6c223828 | 4957 | nlh->nlmsg_seq, RTM_NEWADDR, 0); |
26932566 PM |
4958 | if (err < 0) { |
4959 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
4960 | WARN_ON(err == -EMSGSIZE); | |
4961 | kfree_skb(skb); | |
4962 | goto errout_ifa; | |
4963 | } | |
15e47304 | 4964 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); |
1b29fc2c | 4965 | errout_ifa: |
6c223828 | 4966 | in6_ifa_put(ifa); |
1b29fc2c | 4967 | errout: |
6c223828 | 4968 | return err; |
6c223828 NT |
4969 | } |
4970 | ||
1da177e4 LT |
4971 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
4972 | { | |
4973 | struct sk_buff *skb; | |
c346dca1 | 4974 | struct net *net = dev_net(ifa->idev->dev); |
5d620266 | 4975 | int err = -ENOBUFS; |
1da177e4 | 4976 | |
f784ad3d MB |
4977 | /* Don't send DELADDR notification for TENTATIVE address, |
4978 | * since NEWADDR notification is sent only after removing | |
6819a14e | 4979 | * TENTATIVE flag, if DAD has not failed. |
f784ad3d | 4980 | */ |
6819a14e MM |
4981 | if (ifa->flags & IFA_F_TENTATIVE && !(ifa->flags & IFA_F_DADFAILED) && |
4982 | event == RTM_DELADDR) | |
f784ad3d MB |
4983 | return; |
4984 | ||
0ab6803b | 4985 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
63159f29 | 4986 | if (!skb) |
5d620266 TG |
4987 | goto errout; |
4988 | ||
4989 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
4990 | if (err < 0) { |
4991 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
4992 | WARN_ON(err == -EMSGSIZE); | |
4993 | kfree_skb(skb); | |
4994 | goto errout; | |
4995 | } | |
1ce85fe4 PNA |
4996 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
4997 | return; | |
5d620266 TG |
4998 | errout: |
4999 | if (err < 0) | |
6fda7350 | 5000 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
5001 | } |
5002 | ||
b6f99a21 | 5003 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
5004 | __s32 *array, int bytes) |
5005 | { | |
04561c1f TG |
5006 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
5007 | ||
1da177e4 LT |
5008 | memset(array, 0, bytes); |
5009 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
5010 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
5011 | array[DEVCONF_MTU6] = cnf->mtu6; | |
5012 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
5013 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
5014 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
5015 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
5016 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
93908d19 TG |
5017 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = |
5018 | jiffies_to_msecs(cnf->rtr_solicit_interval); | |
bd11f074 MŻ |
5019 | array[DEVCONF_RTR_SOLICIT_MAX_INTERVAL] = |
5020 | jiffies_to_msecs(cnf->rtr_solicit_max_interval); | |
93908d19 TG |
5021 | array[DEVCONF_RTR_SOLICIT_DELAY] = |
5022 | jiffies_to_msecs(cnf->rtr_solicit_delay); | |
1da177e4 | 5023 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; |
fc4eba58 HFS |
5024 | array[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL] = |
5025 | jiffies_to_msecs(cnf->mldv1_unsolicited_report_interval); | |
5026 | array[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL] = | |
5027 | jiffies_to_msecs(cnf->mldv2_unsolicited_report_interval); | |
1da177e4 LT |
5028 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; |
5029 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
5030 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
5031 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
5032 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
1da177e4 | 5033 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; |
65f5c7c1 | 5034 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
8013d1d7 | 5035 | array[DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT] = cnf->accept_ra_min_hop_limit; |
c4fd30eb | 5036 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
5037 | #ifdef CONFIG_IPV6_ROUTER_PREF |
5038 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
93908d19 TG |
5039 | array[DEVCONF_RTR_PROBE_INTERVAL] = |
5040 | jiffies_to_msecs(cnf->rtr_probe_interval); | |
fa03ef38 | 5041 | #ifdef CONFIG_IPV6_ROUTE_INFO |
bbea124b | 5042 | array[DEVCONF_ACCEPT_RA_RT_INFO_MIN_PLEN] = cnf->accept_ra_rt_info_min_plen; |
09c884d4 YH |
5043 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
5044 | #endif | |
930d6ff2 | 5045 | #endif |
fbea49e1 | 5046 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 5047 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
5048 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
5049 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
7fd2561e | 5050 | array[DEVCONF_USE_OPTIMISTIC] = cnf->use_optimistic; |
95c385b4 | 5051 | #endif |
7bc570c8 YH |
5052 | #ifdef CONFIG_IPV6_MROUTE |
5053 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; | |
5054 | #endif | |
778d80be | 5055 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
1b34be74 | 5056 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
c3faca05 | 5057 | array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao; |
5cb04436 | 5058 | array[DEVCONF_NDISC_NOTIFY] = cnf->ndisc_notify; |
b800c3b9 | 5059 | array[DEVCONF_SUPPRESS_FRAG_NDISC] = cnf->suppress_frag_ndisc; |
d9333196 | 5060 | array[DEVCONF_ACCEPT_RA_FROM_LOCAL] = cnf->accept_ra_from_local; |
c2943f14 | 5061 | array[DEVCONF_ACCEPT_RA_MTU] = cnf->accept_ra_mtu; |
35103d11 | 5062 | array[DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN] = cnf->ignore_routes_with_linkdown; |
3d1bec99 | 5063 | /* we omit DEVCONF_STABLE_SECRET for now */ |
3985e8a3 | 5064 | array[DEVCONF_USE_OIF_ADDRS_ONLY] = cnf->use_oif_addrs_only; |
abbc3043 | 5065 | array[DEVCONF_DROP_UNICAST_IN_L2_MULTICAST] = cnf->drop_unicast_in_l2_multicast; |
7a02bf89 | 5066 | array[DEVCONF_DROP_UNSOLICITED_NA] = cnf->drop_unsolicited_na; |
f1705ec1 | 5067 | array[DEVCONF_KEEP_ADDR_ON_DOWN] = cnf->keep_addr_on_down; |
1ababeba | 5068 | array[DEVCONF_SEG6_ENABLED] = cnf->seg6_enabled; |
bf355b8d DL |
5069 | #ifdef CONFIG_IPV6_SEG6_HMAC |
5070 | array[DEVCONF_SEG6_REQUIRE_HMAC] = cnf->seg6_require_hmac; | |
5071 | #endif | |
adc176c5 | 5072 | array[DEVCONF_ENHANCED_DAD] = cnf->enhanced_dad; |
d35a00b8 | 5073 | array[DEVCONF_ADDR_GEN_MODE] = cnf->addr_gen_mode; |
df789fe7 | 5074 | array[DEVCONF_DISABLE_POLICY] = cnf->disable_policy; |
1da177e4 LT |
5075 | } |
5076 | ||
b382b191 TG |
5077 | static inline size_t inet6_ifla6_size(void) |
5078 | { | |
5079 | return nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
5080 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
5081 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
5082 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ | |
f53adae4 DB |
5083 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ |
5084 | + nla_total_size(sizeof(struct in6_addr)); /* IFLA_INET6_TOKEN */ | |
b382b191 TG |
5085 | } |
5086 | ||
339bf98f TG |
5087 | static inline size_t inet6_if_nlmsg_size(void) |
5088 | { | |
5089 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
5090 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
5091 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
5092 | + nla_total_size(4) /* IFLA_MTU */ | |
5093 | + nla_total_size(4) /* IFLA_LINK */ | |
0344338b | 5094 | + nla_total_size(1) /* IFLA_OPERSTATE */ |
b382b191 | 5095 | + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */ |
339bf98f | 5096 | } |
c5396a31 | 5097 | |
be281e55 | 5098 | static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib, |
aca05671 | 5099 | int bytes) |
7f7d9a6b HX |
5100 | { |
5101 | int i; | |
aca05671 | 5102 | int pad = bytes - sizeof(u64) * ICMP6_MIB_MAX; |
7f7d9a6b HX |
5103 | BUG_ON(pad < 0); |
5104 | ||
5105 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
aca05671 JH |
5106 | put_unaligned(ICMP6_MIB_MAX, &stats[0]); |
5107 | for (i = 1; i < ICMP6_MIB_MAX; i++) | |
be281e55 | 5108 | put_unaligned(atomic_long_read(&mib[i]), &stats[i]); |
7f7d9a6b | 5109 | |
aca05671 | 5110 | memset(&stats[ICMP6_MIB_MAX], 0, pad); |
7f7d9a6b HX |
5111 | } |
5112 | ||
698365fa | 5113 | static inline void __snmp6_fill_stats64(u64 *stats, void __percpu *mib, |
a3a77372 | 5114 | int bytes, size_t syncpoff) |
4ce3c183 | 5115 | { |
a3a77372 R |
5116 | int i, c; |
5117 | u64 buff[IPSTATS_MIB_MAX]; | |
5118 | int pad = bytes - sizeof(u64) * IPSTATS_MIB_MAX; | |
5119 | ||
4ce3c183 ED |
5120 | BUG_ON(pad < 0); |
5121 | ||
a3a77372 R |
5122 | memset(buff, 0, sizeof(buff)); |
5123 | buff[0] = IPSTATS_MIB_MAX; | |
4ce3c183 | 5124 | |
a3a77372 R |
5125 | for_each_possible_cpu(c) { |
5126 | for (i = 1; i < IPSTATS_MIB_MAX; i++) | |
5127 | buff[i] += snmp_get_cpu_field64(mib, c, i, syncpoff); | |
5128 | } | |
5129 | ||
5130 | memcpy(stats, buff, IPSTATS_MIB_MAX * sizeof(u64)); | |
5131 | memset(&stats[IPSTATS_MIB_MAX], 0, pad); | |
4ce3c183 ED |
5132 | } |
5133 | ||
7f7d9a6b HX |
5134 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, |
5135 | int bytes) | |
5136 | { | |
e21e8467 | 5137 | switch (attrtype) { |
7f7d9a6b | 5138 | case IFLA_INET6_STATS: |
a3a77372 R |
5139 | __snmp6_fill_stats64(stats, idev->stats.ipv6, bytes, |
5140 | offsetof(struct ipstats_mib, syncp)); | |
7f7d9a6b HX |
5141 | break; |
5142 | case IFLA_INET6_ICMP6STATS: | |
aca05671 | 5143 | __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, bytes); |
7f7d9a6b HX |
5144 | break; |
5145 | } | |
5146 | } | |
5147 | ||
d5566fd7 SV |
5148 | static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev, |
5149 | u32 ext_filter_mask) | |
b382b191 TG |
5150 | { |
5151 | struct nlattr *nla; | |
5152 | struct ifla_cacheinfo ci; | |
5153 | ||
c78679e8 DM |
5154 | if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags)) |
5155 | goto nla_put_failure; | |
b382b191 | 5156 | ci.max_reasm_len = IPV6_MAXPLEN; |
24912420 DM |
5157 | ci.tstamp = cstamp_delta(idev->tstamp); |
5158 | ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time); | |
1f9248e5 | 5159 | ci.retrans_time = jiffies_to_msecs(NEIGH_VAR(idev->nd_parms, RETRANS_TIME)); |
c78679e8 DM |
5160 | if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci)) |
5161 | goto nla_put_failure; | |
b382b191 | 5162 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
63159f29 | 5163 | if (!nla) |
b382b191 TG |
5164 | goto nla_put_failure; |
5165 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); | |
5166 | ||
5167 | /* XXX - MC not implemented */ | |
5168 | ||
d5566fd7 SV |
5169 | if (ext_filter_mask & RTEXT_FILTER_SKIP_STATS) |
5170 | return 0; | |
5171 | ||
b382b191 | 5172 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); |
63159f29 | 5173 | if (!nla) |
b382b191 TG |
5174 | goto nla_put_failure; |
5175 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
5176 | ||
5177 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
63159f29 | 5178 | if (!nla) |
b382b191 TG |
5179 | goto nla_put_failure; |
5180 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
5181 | ||
f53adae4 | 5182 | nla = nla_reserve(skb, IFLA_INET6_TOKEN, sizeof(struct in6_addr)); |
63159f29 | 5183 | if (!nla) |
f53adae4 | 5184 | goto nla_put_failure; |
bc91b0f0 | 5185 | |
d35a00b8 | 5186 | if (nla_put_u8(skb, IFLA_INET6_ADDR_GEN_MODE, idev->cnf.addr_gen_mode)) |
bc91b0f0 JP |
5187 | goto nla_put_failure; |
5188 | ||
f53adae4 DB |
5189 | read_lock_bh(&idev->lock); |
5190 | memcpy(nla_data(nla), idev->token.s6_addr, nla_len(nla)); | |
5191 | read_unlock_bh(&idev->lock); | |
5192 | ||
b382b191 TG |
5193 | return 0; |
5194 | ||
5195 | nla_put_failure: | |
5196 | return -EMSGSIZE; | |
5197 | } | |
5198 | ||
b1974ed0 AR |
5199 | static size_t inet6_get_link_af_size(const struct net_device *dev, |
5200 | u32 ext_filter_mask) | |
b382b191 TG |
5201 | { |
5202 | if (!__in6_dev_get(dev)) | |
5203 | return 0; | |
5204 | ||
5205 | return inet6_ifla6_size(); | |
5206 | } | |
5207 | ||
d5566fd7 SV |
5208 | static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev, |
5209 | u32 ext_filter_mask) | |
b382b191 TG |
5210 | { |
5211 | struct inet6_dev *idev = __in6_dev_get(dev); | |
5212 | ||
5213 | if (!idev) | |
5214 | return -ENODATA; | |
5215 | ||
d5566fd7 | 5216 | if (inet6_fill_ifla6_attrs(skb, idev, ext_filter_mask) < 0) |
b382b191 TG |
5217 | return -EMSGSIZE; |
5218 | ||
5219 | return 0; | |
5220 | } | |
5221 | ||
f53adae4 DB |
5222 | static int inet6_set_iftoken(struct inet6_dev *idev, struct in6_addr *token) |
5223 | { | |
f53adae4 DB |
5224 | struct inet6_ifaddr *ifp; |
5225 | struct net_device *dev = idev->dev; | |
47e27d5e | 5226 | bool clear_token, update_rs = false; |
dc848292 | 5227 | struct in6_addr ll_addr; |
f53adae4 | 5228 | |
c15b1cca HFS |
5229 | ASSERT_RTNL(); |
5230 | ||
63159f29 | 5231 | if (!token) |
f53adae4 | 5232 | return -EINVAL; |
f53adae4 DB |
5233 | if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) |
5234 | return -EINVAL; | |
f53adae4 DB |
5235 | if (!ipv6_accept_ra(idev)) |
5236 | return -EINVAL; | |
bd11f074 | 5237 | if (idev->cnf.rtr_solicits == 0) |
f53adae4 DB |
5238 | return -EINVAL; |
5239 | ||
5240 | write_lock_bh(&idev->lock); | |
5241 | ||
5242 | BUILD_BUG_ON(sizeof(token->s6_addr) != 16); | |
5243 | memcpy(idev->token.s6_addr + 8, token->s6_addr + 8, 8); | |
5244 | ||
5245 | write_unlock_bh(&idev->lock); | |
5246 | ||
47e27d5e DB |
5247 | clear_token = ipv6_addr_any(token); |
5248 | if (clear_token) | |
5249 | goto update_lft; | |
5250 | ||
dc848292 HFS |
5251 | if (!idev->dead && (idev->if_flags & IF_READY) && |
5252 | !ipv6_get_lladdr(dev, &ll_addr, IFA_F_TENTATIVE | | |
5253 | IFA_F_OPTIMISTIC)) { | |
fc403832 DB |
5254 | /* If we're not ready, then normal ifup will take care |
5255 | * of this. Otherwise, we need to request our rs here. | |
5256 | */ | |
5257 | ndisc_send_rs(dev, &ll_addr, &in6addr_linklocal_allrouters); | |
5258 | update_rs = true; | |
5259 | } | |
f53adae4 | 5260 | |
47e27d5e | 5261 | update_lft: |
f53adae4 | 5262 | write_lock_bh(&idev->lock); |
fc403832 | 5263 | |
77ecaace | 5264 | if (update_rs) { |
fc403832 | 5265 | idev->if_flags |= IF_RS_SENT; |
bd11f074 MŻ |
5266 | idev->rs_interval = rfc3315_s14_backoff_init( |
5267 | idev->cnf.rtr_solicit_interval); | |
77ecaace | 5268 | idev->rs_probes = 1; |
bd11f074 | 5269 | addrconf_mod_rs_timer(idev, idev->rs_interval); |
77ecaace | 5270 | } |
f53adae4 DB |
5271 | |
5272 | /* Well, that's kinda nasty ... */ | |
5273 | list_for_each_entry(ifp, &idev->addr_list, if_list) { | |
5274 | spin_lock(&ifp->lock); | |
617fe29d | 5275 | if (ifp->tokenized) { |
f53adae4 DB |
5276 | ifp->valid_lft = 0; |
5277 | ifp->prefered_lft = 0; | |
5278 | } | |
5279 | spin_unlock(&ifp->lock); | |
5280 | } | |
5281 | ||
5282 | write_unlock_bh(&idev->lock); | |
b2ed64a9 | 5283 | inet6_ifinfo_notify(RTM_NEWLINK, idev); |
c15b1cca | 5284 | addrconf_verify_rtnl(); |
f53adae4 DB |
5285 | return 0; |
5286 | } | |
5287 | ||
11b1f828 DB |
5288 | static const struct nla_policy inet6_af_policy[IFLA_INET6_MAX + 1] = { |
5289 | [IFLA_INET6_ADDR_GEN_MODE] = { .type = NLA_U8 }, | |
5290 | [IFLA_INET6_TOKEN] = { .len = sizeof(struct in6_addr) }, | |
5291 | }; | |
5292 | ||
5293 | static int inet6_validate_link_af(const struct net_device *dev, | |
5294 | const struct nlattr *nla) | |
5295 | { | |
5296 | struct nlattr *tb[IFLA_INET6_MAX + 1]; | |
5297 | ||
5298 | if (dev && !__in6_dev_get(dev)) | |
5299 | return -EAFNOSUPPORT; | |
5300 | ||
fceb6435 JB |
5301 | return nla_parse_nested(tb, IFLA_INET6_MAX, nla, inet6_af_policy, |
5302 | NULL); | |
11b1f828 DB |
5303 | } |
5304 | ||
d35a00b8 FJ |
5305 | static int check_addr_gen_mode(int mode) |
5306 | { | |
5307 | if (mode != IN6_ADDR_GEN_MODE_EUI64 && | |
5308 | mode != IN6_ADDR_GEN_MODE_NONE && | |
5309 | mode != IN6_ADDR_GEN_MODE_STABLE_PRIVACY && | |
5310 | mode != IN6_ADDR_GEN_MODE_RANDOM) | |
5311 | return -EINVAL; | |
5312 | return 1; | |
5313 | } | |
5314 | ||
5315 | static int check_stable_privacy(struct inet6_dev *idev, struct net *net, | |
5316 | int mode) | |
5317 | { | |
5318 | if (mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY && | |
5319 | !idev->cnf.stable_secret.initialized && | |
5320 | !net->ipv6.devconf_dflt->stable_secret.initialized) | |
5321 | return -EINVAL; | |
5322 | return 1; | |
5323 | } | |
5324 | ||
f53adae4 DB |
5325 | static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla) |
5326 | { | |
5327 | int err = -EINVAL; | |
5328 | struct inet6_dev *idev = __in6_dev_get(dev); | |
5329 | struct nlattr *tb[IFLA_INET6_MAX + 1]; | |
5330 | ||
5331 | if (!idev) | |
5332 | return -EAFNOSUPPORT; | |
5333 | ||
fceb6435 | 5334 | if (nla_parse_nested(tb, IFLA_INET6_MAX, nla, NULL, NULL) < 0) |
f53adae4 DB |
5335 | BUG(); |
5336 | ||
bc91b0f0 | 5337 | if (tb[IFLA_INET6_TOKEN]) { |
f53adae4 | 5338 | err = inet6_set_iftoken(idev, nla_data(tb[IFLA_INET6_TOKEN])); |
bc91b0f0 JP |
5339 | if (err) |
5340 | return err; | |
5341 | } | |
5342 | ||
5343 | if (tb[IFLA_INET6_ADDR_GEN_MODE]) { | |
5344 | u8 mode = nla_get_u8(tb[IFLA_INET6_ADDR_GEN_MODE]); | |
5345 | ||
d35a00b8 FJ |
5346 | if (check_addr_gen_mode(mode) < 0 || |
5347 | check_stable_privacy(idev, dev_net(dev), mode) < 0) | |
bc91b0f0 | 5348 | return -EINVAL; |
622c81d5 | 5349 | |
d35a00b8 | 5350 | idev->cnf.addr_gen_mode = mode; |
bc91b0f0 JP |
5351 | err = 0; |
5352 | } | |
f53adae4 DB |
5353 | |
5354 | return err; | |
5355 | } | |
5356 | ||
1ab1457c | 5357 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 5358 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 5359 | { |
04561c1f | 5360 | struct net_device *dev = idev->dev; |
04561c1f TG |
5361 | struct ifinfomsg *hdr; |
5362 | struct nlmsghdr *nlh; | |
5363 | void *protoinfo; | |
04561c1f | 5364 | |
15e47304 | 5365 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*hdr), flags); |
63159f29 | 5366 | if (!nlh) |
26932566 | 5367 | return -EMSGSIZE; |
04561c1f TG |
5368 | |
5369 | hdr = nlmsg_data(nlh); | |
5370 | hdr->ifi_family = AF_INET6; | |
5371 | hdr->__ifi_pad = 0; | |
5372 | hdr->ifi_type = dev->type; | |
5373 | hdr->ifi_index = dev->ifindex; | |
5374 | hdr->ifi_flags = dev_get_flags(dev); | |
5375 | hdr->ifi_change = 0; | |
5376 | ||
c78679e8 DM |
5377 | if (nla_put_string(skb, IFLA_IFNAME, dev->name) || |
5378 | (dev->addr_len && | |
5379 | nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || | |
5380 | nla_put_u32(skb, IFLA_MTU, dev->mtu) || | |
a54acb3a | 5381 | (dev->ifindex != dev_get_iflink(dev) && |
0344338b AG |
5382 | nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) || |
5383 | nla_put_u8(skb, IFLA_OPERSTATE, | |
5384 | netif_running(dev) ? dev->operstate : IF_OPER_DOWN)) | |
c78679e8 | 5385 | goto nla_put_failure; |
04561c1f | 5386 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
63159f29 | 5387 | if (!protoinfo) |
04561c1f | 5388 | goto nla_put_failure; |
1da177e4 | 5389 | |
d5566fd7 | 5390 | if (inet6_fill_ifla6_attrs(skb, idev, 0) < 0) |
bf99f1bd | 5391 | goto nla_put_failure; |
1da177e4 | 5392 | |
04561c1f | 5393 | nla_nest_end(skb, protoinfo); |
053c095a JB |
5394 | nlmsg_end(skb, nlh); |
5395 | return 0; | |
1da177e4 | 5396 | |
04561c1f | 5397 | nla_put_failure: |
26932566 PM |
5398 | nlmsg_cancel(skb, nlh); |
5399 | return -EMSGSIZE; | |
1da177e4 LT |
5400 | } |
5401 | ||
5402 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
5403 | { | |
3b1e0a65 | 5404 | struct net *net = sock_net(skb->sk); |
84d2697d | 5405 | int h, s_h; |
434a8a58 | 5406 | int idx = 0, s_idx; |
1da177e4 LT |
5407 | struct net_device *dev; |
5408 | struct inet6_dev *idev; | |
84d2697d | 5409 | struct hlist_head *head; |
1da177e4 | 5410 | |
84d2697d ED |
5411 | s_h = cb->args[0]; |
5412 | s_idx = cb->args[1]; | |
5413 | ||
5414 | rcu_read_lock(); | |
5415 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
5416 | idx = 0; | |
5417 | head = &net->dev_index_head[h]; | |
b67bfe0d | 5418 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
84d2697d ED |
5419 | if (idx < s_idx) |
5420 | goto cont; | |
5421 | idev = __in6_dev_get(dev); | |
5422 | if (!idev) | |
5423 | goto cont; | |
5424 | if (inet6_fill_ifinfo(skb, idev, | |
15e47304 | 5425 | NETLINK_CB(cb->skb).portid, |
84d2697d | 5426 | cb->nlh->nlmsg_seq, |
053c095a | 5427 | RTM_NEWLINK, NLM_F_MULTI) < 0) |
84d2697d | 5428 | goto out; |
7562f876 | 5429 | cont: |
84d2697d ED |
5430 | idx++; |
5431 | } | |
1da177e4 | 5432 | } |
84d2697d ED |
5433 | out: |
5434 | rcu_read_unlock(); | |
5435 | cb->args[1] = idx; | |
5436 | cb->args[0] = h; | |
1da177e4 LT |
5437 | |
5438 | return skb->len; | |
5439 | } | |
5440 | ||
5441 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
5442 | { | |
5443 | struct sk_buff *skb; | |
c346dca1 | 5444 | struct net *net = dev_net(idev->dev); |
8d7a76c9 | 5445 | int err = -ENOBUFS; |
1ab1457c | 5446 | |
339bf98f | 5447 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
63159f29 | 5448 | if (!skb) |
8d7a76c9 TG |
5449 | goto errout; |
5450 | ||
5451 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
5452 | if (err < 0) { |
5453 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
5454 | WARN_ON(err == -EMSGSIZE); | |
5455 | kfree_skb(skb); | |
5456 | goto errout; | |
5457 | } | |
5f75a104 | 5458 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC); |
1ce85fe4 | 5459 | return; |
8d7a76c9 TG |
5460 | errout: |
5461 | if (err < 0) | |
5f75a104 | 5462 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err); |
1da177e4 LT |
5463 | } |
5464 | ||
339bf98f TG |
5465 | static inline size_t inet6_prefix_nlmsg_size(void) |
5466 | { | |
5467 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
5468 | + nla_total_size(sizeof(struct in6_addr)) | |
5469 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
5470 | } | |
c5396a31 | 5471 | |
1da177e4 | 5472 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 5473 | struct prefix_info *pinfo, u32 portid, u32 seq, |
6051e2f4 | 5474 | int event, unsigned int flags) |
1da177e4 | 5475 | { |
6051e2f4 TG |
5476 | struct prefixmsg *pmsg; |
5477 | struct nlmsghdr *nlh; | |
1da177e4 LT |
5478 | struct prefix_cacheinfo ci; |
5479 | ||
15e47304 | 5480 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*pmsg), flags); |
63159f29 | 5481 | if (!nlh) |
26932566 | 5482 | return -EMSGSIZE; |
6051e2f4 TG |
5483 | |
5484 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 5485 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
5486 | pmsg->prefix_pad1 = 0; |
5487 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
5488 | pmsg->prefix_ifindex = idev->dev->ifindex; |
5489 | pmsg->prefix_len = pinfo->prefix_len; | |
5490 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 5491 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
5492 | pmsg->prefix_flags = 0; |
5493 | if (pinfo->onlink) | |
5494 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
5495 | if (pinfo->autoconf) | |
5496 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
5497 | ||
c78679e8 DM |
5498 | if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix)) |
5499 | goto nla_put_failure; | |
1da177e4 LT |
5500 | ci.preferred_time = ntohl(pinfo->prefered); |
5501 | ci.valid_time = ntohl(pinfo->valid); | |
c78679e8 DM |
5502 | if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci)) |
5503 | goto nla_put_failure; | |
053c095a JB |
5504 | nlmsg_end(skb, nlh); |
5505 | return 0; | |
1da177e4 | 5506 | |
6051e2f4 | 5507 | nla_put_failure: |
26932566 PM |
5508 | nlmsg_cancel(skb, nlh); |
5509 | return -EMSGSIZE; | |
1da177e4 LT |
5510 | } |
5511 | ||
1ab1457c | 5512 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
5513 | struct prefix_info *pinfo) |
5514 | { | |
5515 | struct sk_buff *skb; | |
c346dca1 | 5516 | struct net *net = dev_net(idev->dev); |
8c384bfa | 5517 | int err = -ENOBUFS; |
1da177e4 | 5518 | |
339bf98f | 5519 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
63159f29 | 5520 | if (!skb) |
8c384bfa TG |
5521 | goto errout; |
5522 | ||
5523 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
5524 | if (err < 0) { |
5525 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
5526 | WARN_ON(err == -EMSGSIZE); | |
5527 | kfree_skb(skb); | |
5528 | goto errout; | |
5529 | } | |
1ce85fe4 PNA |
5530 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
5531 | return; | |
8c384bfa TG |
5532 | errout: |
5533 | if (err < 0) | |
6fda7350 | 5534 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4 LT |
5535 | } |
5536 | ||
1da177e4 LT |
5537 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
5538 | { | |
63998ac2 ND |
5539 | struct net *net = dev_net(ifp->idev->dev); |
5540 | ||
c15b1cca HFS |
5541 | if (event) |
5542 | ASSERT_RTNL(); | |
5543 | ||
1da177e4 LT |
5544 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); |
5545 | ||
5546 | switch (event) { | |
5547 | case RTM_NEWADDR: | |
95c385b4 NH |
5548 | /* |
5549 | * If the address was optimistic | |
5550 | * we inserted the route at the start of | |
5551 | * our DAD process, so we don't need | |
5552 | * to do it again | |
5553 | */ | |
4e587ea7 | 5554 | if (!rcu_access_pointer(ifp->rt->rt6i_node)) |
95c385b4 | 5555 | ip6_ins_rt(ifp->rt); |
1da177e4 LT |
5556 | if (ifp->idev->cnf.forwarding) |
5557 | addrconf_join_anycast(ifp); | |
7996c799 | 5558 | if (!ipv6_addr_any(&ifp->peer_addr)) |
caeaba79 ND |
5559 | addrconf_prefix_route(&ifp->peer_addr, 128, |
5560 | ifp->idev->dev, 0, 0); | |
1da177e4 LT |
5561 | break; |
5562 | case RTM_DELADDR: | |
5563 | if (ifp->idev->cnf.forwarding) | |
5564 | addrconf_leave_anycast(ifp); | |
5565 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
7996c799 | 5566 | if (!ipv6_addr_any(&ifp->peer_addr)) { |
caeaba79 | 5567 | struct rt6_info *rt; |
caeaba79 | 5568 | |
e7478dfc ND |
5569 | rt = addrconf_get_prefix_route(&ifp->peer_addr, 128, |
5570 | ifp->idev->dev, 0, 0); | |
8e3d5be7 MKL |
5571 | if (rt) |
5572 | ip6_del_rt(rt); | |
caeaba79 | 5573 | } |
38bd10c4 | 5574 | if (ifp->rt) { |
ad65a2f0 WW |
5575 | if (dst_hold_safe(&ifp->rt->dst)) |
5576 | ip6_del_rt(ifp->rt); | |
38bd10c4 | 5577 | } |
705f1c86 | 5578 | rt_genid_bump_ipv6(net); |
1da177e4 LT |
5579 | break; |
5580 | } | |
63998ac2 | 5581 | atomic_inc(&net->ipv6.dev_addr_genid); |
1da177e4 LT |
5582 | } |
5583 | ||
5584 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
5585 | { | |
8814c4b5 | 5586 | rcu_read_lock_bh(); |
1da177e4 LT |
5587 | if (likely(ifp->idev->dead == 0)) |
5588 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 5589 | rcu_read_unlock_bh(); |
1da177e4 LT |
5590 | } |
5591 | ||
5592 | #ifdef CONFIG_SYSCTL | |
5593 | ||
5594 | static | |
fe2c6338 | 5595 | int addrconf_sysctl_forward(struct ctl_table *ctl, int write, |
1da177e4 LT |
5596 | void __user *buffer, size_t *lenp, loff_t *ppos) |
5597 | { | |
5598 | int *valp = ctl->data; | |
5599 | int val = *valp; | |
88af182e | 5600 | loff_t pos = *ppos; |
fe2c6338 | 5601 | struct ctl_table lctl; |
1da177e4 LT |
5602 | int ret; |
5603 | ||
013d97e9 FR |
5604 | /* |
5605 | * ctl->data points to idev->cnf.forwarding, we should | |
5606 | * not modify it until we get the rtnl lock. | |
5607 | */ | |
5608 | lctl = *ctl; | |
5609 | lctl.data = &val; | |
5610 | ||
5611 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
1da177e4 | 5612 | |
c8fecf22 | 5613 | if (write) |
b325fddb | 5614 | ret = addrconf_fixup_forwarding(ctl, valp, val); |
88af182e EB |
5615 | if (ret) |
5616 | *ppos = pos; | |
1ab1457c | 5617 | return ret; |
1da177e4 LT |
5618 | } |
5619 | ||
77751427 ML |
5620 | static |
5621 | int addrconf_sysctl_mtu(struct ctl_table *ctl, int write, | |
5622 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
5623 | { | |
5624 | struct inet6_dev *idev = ctl->extra1; | |
5625 | int min_mtu = IPV6_MIN_MTU; | |
5626 | struct ctl_table lctl; | |
5627 | ||
5628 | lctl = *ctl; | |
5629 | lctl.extra1 = &min_mtu; | |
5630 | lctl.extra2 = idev ? &idev->dev->mtu : NULL; | |
5631 | ||
5632 | return proc_dointvec_minmax(&lctl, write, buffer, lenp, ppos); | |
5633 | } | |
5634 | ||
56d417b1 BH |
5635 | static void dev_disable_change(struct inet6_dev *idev) |
5636 | { | |
75538c2b CW |
5637 | struct netdev_notifier_info info; |
5638 | ||
56d417b1 BH |
5639 | if (!idev || !idev->dev) |
5640 | return; | |
5641 | ||
75538c2b | 5642 | netdev_notifier_info_init(&info, idev->dev); |
56d417b1 | 5643 | if (idev->cnf.disable_ipv6) |
75538c2b | 5644 | addrconf_notify(NULL, NETDEV_DOWN, &info); |
56d417b1 | 5645 | else |
75538c2b | 5646 | addrconf_notify(NULL, NETDEV_UP, &info); |
56d417b1 BH |
5647 | } |
5648 | ||
5649 | static void addrconf_disable_change(struct net *net, __s32 newf) | |
5650 | { | |
5651 | struct net_device *dev; | |
5652 | struct inet6_dev *idev; | |
5653 | ||
03e4deff | 5654 | for_each_netdev(net, dev) { |
56d417b1 BH |
5655 | idev = __in6_dev_get(dev); |
5656 | if (idev) { | |
5657 | int changed = (!idev->cnf.disable_ipv6) ^ (!newf); | |
5658 | idev->cnf.disable_ipv6 = newf; | |
5659 | if (changed) | |
5660 | dev_disable_change(idev); | |
5661 | } | |
56d417b1 | 5662 | } |
56d417b1 BH |
5663 | } |
5664 | ||
013d97e9 | 5665 | static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf) |
56d417b1 BH |
5666 | { |
5667 | struct net *net; | |
013d97e9 FR |
5668 | int old; |
5669 | ||
5670 | if (!rtnl_trylock()) | |
5671 | return restart_syscall(); | |
56d417b1 BH |
5672 | |
5673 | net = (struct net *)table->extra2; | |
013d97e9 FR |
5674 | old = *p; |
5675 | *p = newf; | |
56d417b1 | 5676 | |
013d97e9 FR |
5677 | if (p == &net->ipv6.devconf_dflt->disable_ipv6) { |
5678 | rtnl_unlock(); | |
56d417b1 | 5679 | return 0; |
88af182e | 5680 | } |
56d417b1 BH |
5681 | |
5682 | if (p == &net->ipv6.devconf_all->disable_ipv6) { | |
56d417b1 BH |
5683 | net->ipv6.devconf_dflt->disable_ipv6 = newf; |
5684 | addrconf_disable_change(net, newf); | |
013d97e9 | 5685 | } else if ((!newf) ^ (!old)) |
56d417b1 BH |
5686 | dev_disable_change((struct inet6_dev *)table->extra1); |
5687 | ||
5688 | rtnl_unlock(); | |
5689 | return 0; | |
5690 | } | |
5691 | ||
5692 | static | |
fe2c6338 | 5693 | int addrconf_sysctl_disable(struct ctl_table *ctl, int write, |
56d417b1 BH |
5694 | void __user *buffer, size_t *lenp, loff_t *ppos) |
5695 | { | |
5696 | int *valp = ctl->data; | |
5697 | int val = *valp; | |
88af182e | 5698 | loff_t pos = *ppos; |
fe2c6338 | 5699 | struct ctl_table lctl; |
56d417b1 BH |
5700 | int ret; |
5701 | ||
013d97e9 FR |
5702 | /* |
5703 | * ctl->data points to idev->cnf.disable_ipv6, we should | |
5704 | * not modify it until we get the rtnl lock. | |
5705 | */ | |
5706 | lctl = *ctl; | |
5707 | lctl.data = &val; | |
5708 | ||
5709 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
56d417b1 BH |
5710 | |
5711 | if (write) | |
5712 | ret = addrconf_disable_ipv6(ctl, valp, val); | |
88af182e EB |
5713 | if (ret) |
5714 | *ppos = pos; | |
56d417b1 BH |
5715 | return ret; |
5716 | } | |
5717 | ||
c92d5491 | 5718 | static |
5719 | int addrconf_sysctl_proxy_ndp(struct ctl_table *ctl, int write, | |
5720 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
5721 | { | |
5722 | int *valp = ctl->data; | |
5723 | int ret; | |
5724 | int old, new; | |
5725 | ||
5726 | old = *valp; | |
5727 | ret = proc_dointvec(ctl, write, buffer, lenp, ppos); | |
5728 | new = *valp; | |
5729 | ||
5730 | if (write && old != new) { | |
5731 | struct net *net = ctl->extra2; | |
5732 | ||
5733 | if (!rtnl_trylock()) | |
5734 | return restart_syscall(); | |
5735 | ||
5736 | if (valp == &net->ipv6.devconf_dflt->proxy_ndp) | |
85b3daad DA |
5737 | inet6_netconf_notify_devconf(net, RTM_NEWNETCONF, |
5738 | NETCONFA_PROXY_NEIGH, | |
c92d5491 | 5739 | NETCONFA_IFINDEX_DEFAULT, |
5740 | net->ipv6.devconf_dflt); | |
5741 | else if (valp == &net->ipv6.devconf_all->proxy_ndp) | |
85b3daad DA |
5742 | inet6_netconf_notify_devconf(net, RTM_NEWNETCONF, |
5743 | NETCONFA_PROXY_NEIGH, | |
c92d5491 | 5744 | NETCONFA_IFINDEX_ALL, |
5745 | net->ipv6.devconf_all); | |
5746 | else { | |
5747 | struct inet6_dev *idev = ctl->extra1; | |
5748 | ||
85b3daad DA |
5749 | inet6_netconf_notify_devconf(net, RTM_NEWNETCONF, |
5750 | NETCONFA_PROXY_NEIGH, | |
c92d5491 | 5751 | idev->dev->ifindex, |
5752 | &idev->cnf); | |
5753 | } | |
5754 | rtnl_unlock(); | |
5755 | } | |
5756 | ||
5757 | return ret; | |
5758 | } | |
5759 | ||
d35a00b8 FJ |
5760 | static int addrconf_sysctl_addr_gen_mode(struct ctl_table *ctl, int write, |
5761 | void __user *buffer, size_t *lenp, | |
5762 | loff_t *ppos) | |
5763 | { | |
5764 | int ret = 0; | |
5765 | int new_val; | |
5766 | struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1; | |
5767 | struct net *net = (struct net *)ctl->extra2; | |
5768 | ||
8c171d6c FJ |
5769 | if (!rtnl_trylock()) |
5770 | return restart_syscall(); | |
5771 | ||
d35a00b8 FJ |
5772 | ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
5773 | ||
5774 | if (write) { | |
5775 | new_val = *((int *)ctl->data); | |
5776 | ||
8c171d6c FJ |
5777 | if (check_addr_gen_mode(new_val) < 0) { |
5778 | ret = -EINVAL; | |
5779 | goto out; | |
5780 | } | |
d35a00b8 FJ |
5781 | |
5782 | /* request for default */ | |
5783 | if (&net->ipv6.devconf_dflt->addr_gen_mode == ctl->data) { | |
5784 | ipv6_devconf_dflt.addr_gen_mode = new_val; | |
5785 | ||
5786 | /* request for individual net device */ | |
5787 | } else { | |
5788 | if (!idev) | |
8c171d6c | 5789 | goto out; |
d35a00b8 | 5790 | |
8c171d6c FJ |
5791 | if (check_stable_privacy(idev, net, new_val) < 0) { |
5792 | ret = -EINVAL; | |
5793 | goto out; | |
5794 | } | |
d35a00b8 FJ |
5795 | |
5796 | if (idev->cnf.addr_gen_mode != new_val) { | |
5797 | idev->cnf.addr_gen_mode = new_val; | |
d35a00b8 | 5798 | addrconf_dev_config(idev->dev); |
d35a00b8 FJ |
5799 | } |
5800 | } | |
5801 | } | |
5802 | ||
8c171d6c FJ |
5803 | out: |
5804 | rtnl_unlock(); | |
5805 | ||
d35a00b8 FJ |
5806 | return ret; |
5807 | } | |
5808 | ||
3d1bec99 HFS |
5809 | static int addrconf_sysctl_stable_secret(struct ctl_table *ctl, int write, |
5810 | void __user *buffer, size_t *lenp, | |
5811 | loff_t *ppos) | |
5812 | { | |
5813 | int err; | |
5814 | struct in6_addr addr; | |
5815 | char str[IPV6_MAX_STRLEN]; | |
5816 | struct ctl_table lctl = *ctl; | |
622c81d5 | 5817 | struct net *net = ctl->extra2; |
3d1bec99 HFS |
5818 | struct ipv6_stable_secret *secret = ctl->data; |
5819 | ||
622c81d5 HFS |
5820 | if (&net->ipv6.devconf_all->stable_secret == ctl->data) |
5821 | return -EIO; | |
5822 | ||
3d1bec99 HFS |
5823 | lctl.maxlen = IPV6_MAX_STRLEN; |
5824 | lctl.data = str; | |
5825 | ||
5826 | if (!rtnl_trylock()) | |
5827 | return restart_syscall(); | |
5828 | ||
5829 | if (!write && !secret->initialized) { | |
5830 | err = -EIO; | |
5831 | goto out; | |
5832 | } | |
5833 | ||
5449a5ca WC |
5834 | err = snprintf(str, sizeof(str), "%pI6", &secret->secret); |
5835 | if (err >= sizeof(str)) { | |
5836 | err = -EIO; | |
5837 | goto out; | |
3d1bec99 HFS |
5838 | } |
5839 | ||
5840 | err = proc_dostring(&lctl, write, buffer, lenp, ppos); | |
5841 | if (err || !write) | |
5842 | goto out; | |
5843 | ||
5844 | if (in6_pton(str, -1, addr.in6_u.u6_addr8, -1, NULL) != 1) { | |
5845 | err = -EIO; | |
5846 | goto out; | |
5847 | } | |
5848 | ||
5849 | secret->initialized = true; | |
5850 | secret->secret = addr; | |
5851 | ||
622c81d5 HFS |
5852 | if (&net->ipv6.devconf_dflt->stable_secret == ctl->data) { |
5853 | struct net_device *dev; | |
5854 | ||
5855 | for_each_netdev(net, dev) { | |
5856 | struct inet6_dev *idev = __in6_dev_get(dev); | |
5857 | ||
5858 | if (idev) { | |
d35a00b8 | 5859 | idev->cnf.addr_gen_mode = |
622c81d5 HFS |
5860 | IN6_ADDR_GEN_MODE_STABLE_PRIVACY; |
5861 | } | |
5862 | } | |
5863 | } else { | |
5864 | struct inet6_dev *idev = ctl->extra1; | |
5865 | ||
d35a00b8 | 5866 | idev->cnf.addr_gen_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY; |
622c81d5 HFS |
5867 | } |
5868 | ||
3d1bec99 HFS |
5869 | out: |
5870 | rtnl_unlock(); | |
5871 | ||
5872 | return err; | |
5873 | } | |
c92d5491 | 5874 | |
35103d11 AG |
5875 | static |
5876 | int addrconf_sysctl_ignore_routes_with_linkdown(struct ctl_table *ctl, | |
5877 | int write, | |
5878 | void __user *buffer, | |
5879 | size_t *lenp, | |
5880 | loff_t *ppos) | |
5881 | { | |
5882 | int *valp = ctl->data; | |
5883 | int val = *valp; | |
5884 | loff_t pos = *ppos; | |
5885 | struct ctl_table lctl; | |
5886 | int ret; | |
5887 | ||
5888 | /* ctl->data points to idev->cnf.ignore_routes_when_linkdown | |
5889 | * we should not modify it until we get the rtnl lock. | |
5890 | */ | |
5891 | lctl = *ctl; | |
5892 | lctl.data = &val; | |
5893 | ||
5894 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
5895 | ||
5896 | if (write) | |
5897 | ret = addrconf_fixup_linkdown(ctl, valp, val); | |
5898 | if (ret) | |
5899 | *ppos = pos; | |
5900 | return ret; | |
5901 | } | |
5902 | ||
df789fe7 DF |
5903 | static |
5904 | void addrconf_set_nopolicy(struct rt6_info *rt, int action) | |
5905 | { | |
5906 | if (rt) { | |
5907 | if (action) | |
5908 | rt->dst.flags |= DST_NOPOLICY; | |
5909 | else | |
5910 | rt->dst.flags &= ~DST_NOPOLICY; | |
5911 | } | |
5912 | } | |
5913 | ||
5914 | static | |
5915 | void addrconf_disable_policy_idev(struct inet6_dev *idev, int val) | |
5916 | { | |
5917 | struct inet6_ifaddr *ifa; | |
5918 | ||
5919 | read_lock_bh(&idev->lock); | |
5920 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
5921 | spin_lock(&ifa->lock); | |
5922 | if (ifa->rt) { | |
5923 | struct rt6_info *rt = ifa->rt; | |
5924 | struct fib6_table *table = rt->rt6i_table; | |
5925 | int cpu; | |
5926 | ||
5927 | read_lock(&table->tb6_lock); | |
5928 | addrconf_set_nopolicy(ifa->rt, val); | |
5929 | if (rt->rt6i_pcpu) { | |
5930 | for_each_possible_cpu(cpu) { | |
5931 | struct rt6_info **rtp; | |
5932 | ||
5933 | rtp = per_cpu_ptr(rt->rt6i_pcpu, cpu); | |
5934 | addrconf_set_nopolicy(*rtp, val); | |
5935 | } | |
5936 | } | |
5937 | read_unlock(&table->tb6_lock); | |
5938 | } | |
5939 | spin_unlock(&ifa->lock); | |
5940 | } | |
5941 | read_unlock_bh(&idev->lock); | |
5942 | } | |
5943 | ||
5944 | static | |
5945 | int addrconf_disable_policy(struct ctl_table *ctl, int *valp, int val) | |
5946 | { | |
5947 | struct inet6_dev *idev; | |
5948 | struct net *net; | |
5949 | ||
5950 | if (!rtnl_trylock()) | |
5951 | return restart_syscall(); | |
5952 | ||
5953 | *valp = val; | |
5954 | ||
5955 | net = (struct net *)ctl->extra2; | |
5956 | if (valp == &net->ipv6.devconf_dflt->disable_policy) { | |
5957 | rtnl_unlock(); | |
5958 | return 0; | |
5959 | } | |
5960 | ||
5961 | if (valp == &net->ipv6.devconf_all->disable_policy) { | |
5962 | struct net_device *dev; | |
5963 | ||
5964 | for_each_netdev(net, dev) { | |
5965 | idev = __in6_dev_get(dev); | |
5966 | if (idev) | |
5967 | addrconf_disable_policy_idev(idev, val); | |
5968 | } | |
5969 | } else { | |
5970 | idev = (struct inet6_dev *)ctl->extra1; | |
5971 | addrconf_disable_policy_idev(idev, val); | |
5972 | } | |
5973 | ||
5974 | rtnl_unlock(); | |
5975 | return 0; | |
5976 | } | |
5977 | ||
5978 | static | |
5979 | int addrconf_sysctl_disable_policy(struct ctl_table *ctl, int write, | |
5980 | void __user *buffer, size_t *lenp, | |
5981 | loff_t *ppos) | |
5982 | { | |
5983 | int *valp = ctl->data; | |
5984 | int val = *valp; | |
5985 | loff_t pos = *ppos; | |
5986 | struct ctl_table lctl; | |
5987 | int ret; | |
5988 | ||
5989 | lctl = *ctl; | |
5990 | lctl.data = &val; | |
5991 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
5992 | ||
5993 | if (write && (*valp != val)) | |
5994 | ret = addrconf_disable_policy(ctl, valp, val); | |
5995 | ||
5996 | if (ret) | |
5997 | *ppos = pos; | |
5998 | ||
5999 | return ret; | |
6000 | } | |
6001 | ||
cb4a4c69 | 6002 | static int minus_one = -1; |
cb9e684e MŻ |
6003 | static const int one = 1; |
6004 | static const int two_five_five = 255; | |
6005 | ||
607ea7cd | 6006 | static const struct ctl_table addrconf_sysctl[] = { |
5df1f77f KK |
6007 | { |
6008 | .procname = "forwarding", | |
6009 | .data = &ipv6_devconf.forwarding, | |
6010 | .maxlen = sizeof(int), | |
6011 | .mode = 0644, | |
6012 | .proc_handler = addrconf_sysctl_forward, | |
6013 | }, | |
6014 | { | |
6015 | .procname = "hop_limit", | |
6016 | .data = &ipv6_devconf.hop_limit, | |
6017 | .maxlen = sizeof(int), | |
6018 | .mode = 0644, | |
cb9e684e MŻ |
6019 | .proc_handler = proc_dointvec_minmax, |
6020 | .extra1 = (void *)&one, | |
6021 | .extra2 = (void *)&two_five_five, | |
5df1f77f KK |
6022 | }, |
6023 | { | |
6024 | .procname = "mtu", | |
6025 | .data = &ipv6_devconf.mtu6, | |
6026 | .maxlen = sizeof(int), | |
6027 | .mode = 0644, | |
6028 | .proc_handler = addrconf_sysctl_mtu, | |
6029 | }, | |
6030 | { | |
6031 | .procname = "accept_ra", | |
6032 | .data = &ipv6_devconf.accept_ra, | |
6033 | .maxlen = sizeof(int), | |
6034 | .mode = 0644, | |
6035 | .proc_handler = proc_dointvec, | |
6036 | }, | |
6037 | { | |
6038 | .procname = "accept_redirects", | |
6039 | .data = &ipv6_devconf.accept_redirects, | |
6040 | .maxlen = sizeof(int), | |
6041 | .mode = 0644, | |
6042 | .proc_handler = proc_dointvec, | |
6043 | }, | |
6044 | { | |
6045 | .procname = "autoconf", | |
6046 | .data = &ipv6_devconf.autoconf, | |
6047 | .maxlen = sizeof(int), | |
6048 | .mode = 0644, | |
6049 | .proc_handler = proc_dointvec, | |
6050 | }, | |
6051 | { | |
6052 | .procname = "dad_transmits", | |
6053 | .data = &ipv6_devconf.dad_transmits, | |
6054 | .maxlen = sizeof(int), | |
6055 | .mode = 0644, | |
6056 | .proc_handler = proc_dointvec, | |
6057 | }, | |
6058 | { | |
6059 | .procname = "router_solicitations", | |
6060 | .data = &ipv6_devconf.rtr_solicits, | |
6061 | .maxlen = sizeof(int), | |
6062 | .mode = 0644, | |
cb4a4c69 MŻ |
6063 | .proc_handler = proc_dointvec_minmax, |
6064 | .extra1 = &minus_one, | |
5df1f77f KK |
6065 | }, |
6066 | { | |
6067 | .procname = "router_solicitation_interval", | |
6068 | .data = &ipv6_devconf.rtr_solicit_interval, | |
6069 | .maxlen = sizeof(int), | |
6070 | .mode = 0644, | |
6071 | .proc_handler = proc_dointvec_jiffies, | |
6072 | }, | |
bd11f074 MŻ |
6073 | { |
6074 | .procname = "router_solicitation_max_interval", | |
6075 | .data = &ipv6_devconf.rtr_solicit_max_interval, | |
6076 | .maxlen = sizeof(int), | |
6077 | .mode = 0644, | |
6078 | .proc_handler = proc_dointvec_jiffies, | |
6079 | }, | |
5df1f77f KK |
6080 | { |
6081 | .procname = "router_solicitation_delay", | |
6082 | .data = &ipv6_devconf.rtr_solicit_delay, | |
6083 | .maxlen = sizeof(int), | |
6084 | .mode = 0644, | |
6085 | .proc_handler = proc_dointvec_jiffies, | |
6086 | }, | |
6087 | { | |
6088 | .procname = "force_mld_version", | |
6089 | .data = &ipv6_devconf.force_mld_version, | |
6090 | .maxlen = sizeof(int), | |
6091 | .mode = 0644, | |
6092 | .proc_handler = proc_dointvec, | |
6093 | }, | |
6094 | { | |
6095 | .procname = "mldv1_unsolicited_report_interval", | |
6096 | .data = | |
6097 | &ipv6_devconf.mldv1_unsolicited_report_interval, | |
6098 | .maxlen = sizeof(int), | |
6099 | .mode = 0644, | |
6100 | .proc_handler = proc_dointvec_ms_jiffies, | |
6101 | }, | |
6102 | { | |
6103 | .procname = "mldv2_unsolicited_report_interval", | |
6104 | .data = | |
6105 | &ipv6_devconf.mldv2_unsolicited_report_interval, | |
6106 | .maxlen = sizeof(int), | |
6107 | .mode = 0644, | |
6108 | .proc_handler = proc_dointvec_ms_jiffies, | |
6109 | }, | |
6110 | { | |
6111 | .procname = "use_tempaddr", | |
6112 | .data = &ipv6_devconf.use_tempaddr, | |
6113 | .maxlen = sizeof(int), | |
6114 | .mode = 0644, | |
6115 | .proc_handler = proc_dointvec, | |
6116 | }, | |
6117 | { | |
6118 | .procname = "temp_valid_lft", | |
6119 | .data = &ipv6_devconf.temp_valid_lft, | |
6120 | .maxlen = sizeof(int), | |
6121 | .mode = 0644, | |
6122 | .proc_handler = proc_dointvec, | |
6123 | }, | |
6124 | { | |
6125 | .procname = "temp_prefered_lft", | |
6126 | .data = &ipv6_devconf.temp_prefered_lft, | |
6127 | .maxlen = sizeof(int), | |
6128 | .mode = 0644, | |
6129 | .proc_handler = proc_dointvec, | |
6130 | }, | |
6131 | { | |
6132 | .procname = "regen_max_retry", | |
6133 | .data = &ipv6_devconf.regen_max_retry, | |
6134 | .maxlen = sizeof(int), | |
6135 | .mode = 0644, | |
6136 | .proc_handler = proc_dointvec, | |
6137 | }, | |
6138 | { | |
6139 | .procname = "max_desync_factor", | |
6140 | .data = &ipv6_devconf.max_desync_factor, | |
6141 | .maxlen = sizeof(int), | |
6142 | .mode = 0644, | |
6143 | .proc_handler = proc_dointvec, | |
6144 | }, | |
6145 | { | |
6146 | .procname = "max_addresses", | |
6147 | .data = &ipv6_devconf.max_addresses, | |
6148 | .maxlen = sizeof(int), | |
6149 | .mode = 0644, | |
6150 | .proc_handler = proc_dointvec, | |
6151 | }, | |
6152 | { | |
6153 | .procname = "accept_ra_defrtr", | |
6154 | .data = &ipv6_devconf.accept_ra_defrtr, | |
6155 | .maxlen = sizeof(int), | |
6156 | .mode = 0644, | |
6157 | .proc_handler = proc_dointvec, | |
6158 | }, | |
6159 | { | |
6160 | .procname = "accept_ra_min_hop_limit", | |
6161 | .data = &ipv6_devconf.accept_ra_min_hop_limit, | |
6162 | .maxlen = sizeof(int), | |
6163 | .mode = 0644, | |
6164 | .proc_handler = proc_dointvec, | |
6165 | }, | |
6166 | { | |
6167 | .procname = "accept_ra_pinfo", | |
6168 | .data = &ipv6_devconf.accept_ra_pinfo, | |
6169 | .maxlen = sizeof(int), | |
6170 | .mode = 0644, | |
6171 | .proc_handler = proc_dointvec, | |
6172 | }, | |
930d6ff2 | 6173 | #ifdef CONFIG_IPV6_ROUTER_PREF |
5df1f77f KK |
6174 | { |
6175 | .procname = "accept_ra_rtr_pref", | |
6176 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
6177 | .maxlen = sizeof(int), | |
6178 | .mode = 0644, | |
6179 | .proc_handler = proc_dointvec, | |
6180 | }, | |
6181 | { | |
6182 | .procname = "router_probe_interval", | |
6183 | .data = &ipv6_devconf.rtr_probe_interval, | |
6184 | .maxlen = sizeof(int), | |
6185 | .mode = 0644, | |
6186 | .proc_handler = proc_dointvec_jiffies, | |
6187 | }, | |
fa03ef38 | 6188 | #ifdef CONFIG_IPV6_ROUTE_INFO |
bbea124b JS |
6189 | { |
6190 | .procname = "accept_ra_rt_info_min_plen", | |
6191 | .data = &ipv6_devconf.accept_ra_rt_info_min_plen, | |
6192 | .maxlen = sizeof(int), | |
6193 | .mode = 0644, | |
6194 | .proc_handler = proc_dointvec, | |
6195 | }, | |
5df1f77f KK |
6196 | { |
6197 | .procname = "accept_ra_rt_info_max_plen", | |
6198 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
6199 | .maxlen = sizeof(int), | |
6200 | .mode = 0644, | |
6201 | .proc_handler = proc_dointvec, | |
6202 | }, | |
09c884d4 | 6203 | #endif |
930d6ff2 | 6204 | #endif |
5df1f77f KK |
6205 | { |
6206 | .procname = "proxy_ndp", | |
6207 | .data = &ipv6_devconf.proxy_ndp, | |
6208 | .maxlen = sizeof(int), | |
6209 | .mode = 0644, | |
6210 | .proc_handler = addrconf_sysctl_proxy_ndp, | |
6211 | }, | |
6212 | { | |
6213 | .procname = "accept_source_route", | |
6214 | .data = &ipv6_devconf.accept_source_route, | |
6215 | .maxlen = sizeof(int), | |
6216 | .mode = 0644, | |
6217 | .proc_handler = proc_dointvec, | |
6218 | }, | |
95c385b4 | 6219 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
5df1f77f KK |
6220 | { |
6221 | .procname = "optimistic_dad", | |
6222 | .data = &ipv6_devconf.optimistic_dad, | |
6223 | .maxlen = sizeof(int), | |
6224 | .mode = 0644, | |
6225 | .proc_handler = proc_dointvec, | |
6226 | }, | |
6227 | { | |
6228 | .procname = "use_optimistic", | |
6229 | .data = &ipv6_devconf.use_optimistic, | |
6230 | .maxlen = sizeof(int), | |
6231 | .mode = 0644, | |
6232 | .proc_handler = proc_dointvec, | |
6233 | }, | |
7bc570c8 YH |
6234 | #endif |
6235 | #ifdef CONFIG_IPV6_MROUTE | |
5df1f77f KK |
6236 | { |
6237 | .procname = "mc_forwarding", | |
6238 | .data = &ipv6_devconf.mc_forwarding, | |
6239 | .maxlen = sizeof(int), | |
6240 | .mode = 0444, | |
6241 | .proc_handler = proc_dointvec, | |
6242 | }, | |
95c385b4 | 6243 | #endif |
5df1f77f KK |
6244 | { |
6245 | .procname = "disable_ipv6", | |
6246 | .data = &ipv6_devconf.disable_ipv6, | |
6247 | .maxlen = sizeof(int), | |
6248 | .mode = 0644, | |
6249 | .proc_handler = addrconf_sysctl_disable, | |
6250 | }, | |
6251 | { | |
6252 | .procname = "accept_dad", | |
6253 | .data = &ipv6_devconf.accept_dad, | |
6254 | .maxlen = sizeof(int), | |
6255 | .mode = 0644, | |
6256 | .proc_handler = proc_dointvec, | |
6257 | }, | |
6258 | { | |
6259 | .procname = "force_tllao", | |
6260 | .data = &ipv6_devconf.force_tllao, | |
6261 | .maxlen = sizeof(int), | |
6262 | .mode = 0644, | |
6263 | .proc_handler = proc_dointvec | |
6264 | }, | |
6265 | { | |
6266 | .procname = "ndisc_notify", | |
6267 | .data = &ipv6_devconf.ndisc_notify, | |
6268 | .maxlen = sizeof(int), | |
6269 | .mode = 0644, | |
6270 | .proc_handler = proc_dointvec | |
6271 | }, | |
6272 | { | |
6273 | .procname = "suppress_frag_ndisc", | |
6274 | .data = &ipv6_devconf.suppress_frag_ndisc, | |
6275 | .maxlen = sizeof(int), | |
6276 | .mode = 0644, | |
6277 | .proc_handler = proc_dointvec | |
6278 | }, | |
6279 | { | |
6280 | .procname = "accept_ra_from_local", | |
6281 | .data = &ipv6_devconf.accept_ra_from_local, | |
6282 | .maxlen = sizeof(int), | |
6283 | .mode = 0644, | |
6284 | .proc_handler = proc_dointvec, | |
6285 | }, | |
6286 | { | |
6287 | .procname = "accept_ra_mtu", | |
6288 | .data = &ipv6_devconf.accept_ra_mtu, | |
6289 | .maxlen = sizeof(int), | |
6290 | .mode = 0644, | |
6291 | .proc_handler = proc_dointvec, | |
6292 | }, | |
6293 | { | |
6294 | .procname = "stable_secret", | |
6295 | .data = &ipv6_devconf.stable_secret, | |
6296 | .maxlen = IPV6_MAX_STRLEN, | |
6297 | .mode = 0600, | |
6298 | .proc_handler = addrconf_sysctl_stable_secret, | |
6299 | }, | |
6300 | { | |
6301 | .procname = "use_oif_addrs_only", | |
6302 | .data = &ipv6_devconf.use_oif_addrs_only, | |
6303 | .maxlen = sizeof(int), | |
6304 | .mode = 0644, | |
6305 | .proc_handler = proc_dointvec, | |
6306 | }, | |
6307 | { | |
6308 | .procname = "ignore_routes_with_linkdown", | |
6309 | .data = &ipv6_devconf.ignore_routes_with_linkdown, | |
6310 | .maxlen = sizeof(int), | |
6311 | .mode = 0644, | |
6312 | .proc_handler = addrconf_sysctl_ignore_routes_with_linkdown, | |
6313 | }, | |
6314 | { | |
6315 | .procname = "drop_unicast_in_l2_multicast", | |
6316 | .data = &ipv6_devconf.drop_unicast_in_l2_multicast, | |
6317 | .maxlen = sizeof(int), | |
6318 | .mode = 0644, | |
6319 | .proc_handler = proc_dointvec, | |
6320 | }, | |
6321 | { | |
6322 | .procname = "drop_unsolicited_na", | |
6323 | .data = &ipv6_devconf.drop_unsolicited_na, | |
6324 | .maxlen = sizeof(int), | |
6325 | .mode = 0644, | |
6326 | .proc_handler = proc_dointvec, | |
6327 | }, | |
6328 | { | |
6329 | .procname = "keep_addr_on_down", | |
6330 | .data = &ipv6_devconf.keep_addr_on_down, | |
6331 | .maxlen = sizeof(int), | |
6332 | .mode = 0644, | |
6333 | .proc_handler = proc_dointvec, | |
6334 | ||
6335 | }, | |
1ababeba DL |
6336 | { |
6337 | .procname = "seg6_enabled", | |
6338 | .data = &ipv6_devconf.seg6_enabled, | |
6339 | .maxlen = sizeof(int), | |
6340 | .mode = 0644, | |
6341 | .proc_handler = proc_dointvec, | |
6342 | }, | |
bf355b8d DL |
6343 | #ifdef CONFIG_IPV6_SEG6_HMAC |
6344 | { | |
6345 | .procname = "seg6_require_hmac", | |
6346 | .data = &ipv6_devconf.seg6_require_hmac, | |
6347 | .maxlen = sizeof(int), | |
6348 | .mode = 0644, | |
6349 | .proc_handler = proc_dointvec, | |
6350 | }, | |
6351 | #endif | |
adc176c5 EN |
6352 | { |
6353 | .procname = "enhanced_dad", | |
6354 | .data = &ipv6_devconf.enhanced_dad, | |
6355 | .maxlen = sizeof(int), | |
6356 | .mode = 0644, | |
6357 | .proc_handler = proc_dointvec, | |
6358 | }, | |
d35a00b8 FJ |
6359 | { |
6360 | .procname = "addr_gen_mode", | |
6361 | .data = &ipv6_devconf.addr_gen_mode, | |
6362 | .maxlen = sizeof(int), | |
6363 | .mode = 0644, | |
6364 | .proc_handler = addrconf_sysctl_addr_gen_mode, | |
6365 | }, | |
df789fe7 DF |
6366 | { |
6367 | .procname = "disable_policy", | |
6368 | .data = &ipv6_devconf.disable_policy, | |
6369 | .maxlen = sizeof(int), | |
6370 | .mode = 0644, | |
6371 | .proc_handler = addrconf_sysctl_disable_policy, | |
6372 | }, | |
5df1f77f KK |
6373 | { |
6374 | /* sentinel */ | |
6375 | } | |
1da177e4 LT |
6376 | }; |
6377 | ||
bff16c2f | 6378 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
f8572d8f | 6379 | struct inet6_dev *idev, struct ipv6_devconf *p) |
1da177e4 | 6380 | { |
29c994e3 | 6381 | int i, ifindex; |
607ea7cd | 6382 | struct ctl_table *table; |
6105e293 | 6383 | char path[sizeof("net/ipv6/conf/") + IFNAMSIZ]; |
1dab6222 | 6384 | |
607ea7cd KK |
6385 | table = kmemdup(addrconf_sysctl, sizeof(addrconf_sysctl), GFP_KERNEL); |
6386 | if (!table) | |
f68635e6 PE |
6387 | goto out; |
6388 | ||
607ea7cd KK |
6389 | for (i = 0; table[i].data; i++) { |
6390 | table[i].data += (char *)p - (char *)&ipv6_devconf; | |
cb9e684e MŻ |
6391 | /* If one of these is already set, then it is not safe to |
6392 | * overwrite either of them: this makes proc_dointvec_minmax | |
6393 | * usable. | |
6394 | */ | |
6395 | if (!table[i].extra1 && !table[i].extra2) { | |
6396 | table[i].extra1 = idev; /* embedded; no ref */ | |
6397 | table[i].extra2 = net; | |
6398 | } | |
1da177e4 | 6399 | } |
1da177e4 | 6400 | |
6105e293 | 6401 | snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name); |
1da177e4 | 6402 | |
607ea7cd KK |
6403 | p->sysctl_header = register_net_sysctl(net, path, table); |
6404 | if (!p->sysctl_header) | |
6105e293 | 6405 | goto free; |
f68635e6 | 6406 | |
29c994e3 ND |
6407 | if (!strcmp(dev_name, "all")) |
6408 | ifindex = NETCONFA_IFINDEX_ALL; | |
6409 | else if (!strcmp(dev_name, "default")) | |
6410 | ifindex = NETCONFA_IFINDEX_DEFAULT; | |
6411 | else | |
6412 | ifindex = idev->dev->ifindex; | |
85b3daad DA |
6413 | inet6_netconf_notify_devconf(net, RTM_NEWNETCONF, NETCONFA_ALL, |
6414 | ifindex, p); | |
95897312 | 6415 | return 0; |
1da177e4 | 6416 | |
f68635e6 | 6417 | free: |
607ea7cd | 6418 | kfree(table); |
f68635e6 | 6419 | out: |
95897312 | 6420 | return -ENOBUFS; |
1da177e4 LT |
6421 | } |
6422 | ||
23452170 DA |
6423 | static void __addrconf_sysctl_unregister(struct net *net, |
6424 | struct ipv6_devconf *p, int ifindex) | |
408c4768 | 6425 | { |
607ea7cd | 6426 | struct ctl_table *table; |
408c4768 | 6427 | |
607ea7cd | 6428 | if (!p->sysctl_header) |
408c4768 PE |
6429 | return; |
6430 | ||
607ea7cd KK |
6431 | table = p->sysctl_header->ctl_table_arg; |
6432 | unregister_net_sysctl_table(p->sysctl_header); | |
6433 | p->sysctl_header = NULL; | |
6434 | kfree(table); | |
23452170 DA |
6435 | |
6436 | inet6_netconf_notify_devconf(net, RTM_DELNETCONF, 0, ifindex, NULL); | |
408c4768 PE |
6437 | } |
6438 | ||
a317a2f1 | 6439 | static int addrconf_sysctl_register(struct inet6_dev *idev) |
f52295a9 | 6440 | { |
a317a2f1 WC |
6441 | int err; |
6442 | ||
6443 | if (!sysctl_dev_name_is_allowed(idev->dev->name)) | |
6444 | return -EINVAL; | |
6445 | ||
6446 | err = neigh_sysctl_register(idev->dev, idev->nd_parms, | |
6447 | &ndisc_ifinfo_sysctl_change); | |
6448 | if (err) | |
6449 | return err; | |
6450 | err = __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, | |
6451 | idev, &idev->cnf); | |
6452 | if (err) | |
6453 | neigh_sysctl_unregister(idev->nd_parms); | |
6454 | ||
6455 | return err; | |
f52295a9 PE |
6456 | } |
6457 | ||
408c4768 | 6458 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4 | 6459 | { |
23452170 DA |
6460 | __addrconf_sysctl_unregister(dev_net(idev->dev), &idev->cnf, |
6461 | idev->dev->ifindex); | |
408c4768 | 6462 | neigh_sysctl_unregister(idev->nd_parms); |
1da177e4 LT |
6463 | } |
6464 | ||
6465 | ||
6466 | #endif | |
6467 | ||
2c8c1e72 | 6468 | static int __net_init addrconf_init_net(struct net *net) |
e0da5a48 | 6469 | { |
a79ca223 | 6470 | int err = -ENOMEM; |
e0da5a48 PE |
6471 | struct ipv6_devconf *all, *dflt; |
6472 | ||
a79ca223 | 6473 | all = kmemdup(&ipv6_devconf, sizeof(ipv6_devconf), GFP_KERNEL); |
63159f29 | 6474 | if (!all) |
a79ca223 | 6475 | goto err_alloc_all; |
e0da5a48 | 6476 | |
a79ca223 | 6477 | dflt = kmemdup(&ipv6_devconf_dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); |
63159f29 | 6478 | if (!dflt) |
a79ca223 | 6479 | goto err_alloc_dflt; |
e0da5a48 | 6480 | |
a79ca223 HZ |
6481 | /* these will be inherited by all namespaces */ |
6482 | dflt->autoconf = ipv6_defaults.autoconf; | |
6483 | dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; | |
e0da5a48 | 6484 | |
3d1bec99 HFS |
6485 | dflt->stable_secret.initialized = false; |
6486 | all->stable_secret.initialized = false; | |
6487 | ||
e0da5a48 PE |
6488 | net->ipv6.devconf_all = all; |
6489 | net->ipv6.devconf_dflt = dflt; | |
6490 | ||
6491 | #ifdef CONFIG_SYSCTL | |
f8572d8f | 6492 | err = __addrconf_sysctl_register(net, "all", NULL, all); |
e0da5a48 PE |
6493 | if (err < 0) |
6494 | goto err_reg_all; | |
6495 | ||
f8572d8f | 6496 | err = __addrconf_sysctl_register(net, "default", NULL, dflt); |
e0da5a48 PE |
6497 | if (err < 0) |
6498 | goto err_reg_dflt; | |
6499 | #endif | |
6500 | return 0; | |
6501 | ||
6502 | #ifdef CONFIG_SYSCTL | |
6503 | err_reg_dflt: | |
23452170 | 6504 | __addrconf_sysctl_unregister(net, all, NETCONFA_IFINDEX_ALL); |
e0da5a48 PE |
6505 | err_reg_all: |
6506 | kfree(dflt); | |
6507 | #endif | |
6508 | err_alloc_dflt: | |
6509 | kfree(all); | |
6510 | err_alloc_all: | |
6511 | return err; | |
6512 | } | |
6513 | ||
2c8c1e72 | 6514 | static void __net_exit addrconf_exit_net(struct net *net) |
e0da5a48 PE |
6515 | { |
6516 | #ifdef CONFIG_SYSCTL | |
23452170 DA |
6517 | __addrconf_sysctl_unregister(net, net->ipv6.devconf_dflt, |
6518 | NETCONFA_IFINDEX_DEFAULT); | |
6519 | __addrconf_sysctl_unregister(net, net->ipv6.devconf_all, | |
6520 | NETCONFA_IFINDEX_ALL); | |
e0da5a48 | 6521 | #endif |
73cf0e92 | 6522 | kfree(net->ipv6.devconf_dflt); |
6523 | kfree(net->ipv6.devconf_all); | |
e0da5a48 PE |
6524 | } |
6525 | ||
6526 | static struct pernet_operations addrconf_ops = { | |
6527 | .init = addrconf_init_net, | |
6528 | .exit = addrconf_exit_net, | |
6529 | }; | |
6530 | ||
207895fd | 6531 | static struct rtnl_af_ops inet6_ops __read_mostly = { |
b382b191 TG |
6532 | .family = AF_INET6, |
6533 | .fill_link_af = inet6_fill_link_af, | |
6534 | .get_link_af_size = inet6_get_link_af_size, | |
11b1f828 | 6535 | .validate_link_af = inet6_validate_link_af, |
f53adae4 | 6536 | .set_link_af = inet6_set_link_af, |
b382b191 TG |
6537 | }; |
6538 | ||
1da177e4 LT |
6539 | /* |
6540 | * Init / cleanup code | |
6541 | */ | |
6542 | ||
6543 | int __init addrconf_init(void) | |
6544 | { | |
a317a2f1 | 6545 | struct inet6_dev *idev; |
c2e21293 | 6546 | int i, err; |
2a8cc6c8 | 6547 | |
e21e8467 SH |
6548 | err = ipv6_addr_label_init(); |
6549 | if (err < 0) { | |
f3213831 JP |
6550 | pr_crit("%s: cannot initialize default policy table: %d\n", |
6551 | __func__, err); | |
2cc6d2bf | 6552 | goto out; |
2a8cc6c8 | 6553 | } |
1da177e4 | 6554 | |
2cc6d2bf NH |
6555 | err = register_pernet_subsys(&addrconf_ops); |
6556 | if (err < 0) | |
6557 | goto out_addrlabel; | |
e0da5a48 | 6558 | |
c15b1cca HFS |
6559 | addrconf_wq = create_workqueue("ipv6_addrconf"); |
6560 | if (!addrconf_wq) { | |
6561 | err = -ENOMEM; | |
6562 | goto out_nowq; | |
6563 | } | |
6564 | ||
1da177e4 LT |
6565 | /* The addrconf netdev notifier requires that loopback_dev |
6566 | * has it's ipv6 private information allocated and setup | |
6567 | * before it can bring up and give link-local addresses | |
6568 | * to other devices which are up. | |
6569 | * | |
6570 | * Unfortunately, loopback_dev is not necessarily the first | |
6571 | * entry in the global dev_base list of net devices. In fact, | |
6572 | * it is likely to be the very last entry on that list. | |
6573 | * So this causes the notifier registry below to try and | |
6574 | * give link-local addresses to all devices besides loopback_dev | |
6575 | * first, then loopback_dev, which cases all the non-loopback_dev | |
6576 | * devices to fail to get a link-local address. | |
6577 | * | |
6578 | * So, as a temporary fix, allocate the ipv6 structure for | |
6579 | * loopback_dev first by hand. | |
6580 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
6581 | * device and it being up should be removed. | |
6582 | */ | |
6583 | rtnl_lock(); | |
a317a2f1 | 6584 | idev = ipv6_add_dev(init_net.loopback_dev); |
1da177e4 | 6585 | rtnl_unlock(); |
a317a2f1 WC |
6586 | if (IS_ERR(idev)) { |
6587 | err = PTR_ERR(idev); | |
e0da5a48 | 6588 | goto errlo; |
a317a2f1 | 6589 | } |
1da177e4 | 6590 | |
2f460933 WC |
6591 | ip6_route_init_special_entries(); |
6592 | ||
c2e21293 | 6593 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
6594 | INIT_HLIST_HEAD(&inet6_addr_lst[i]); | |
6595 | ||
1da177e4 LT |
6596 | register_netdevice_notifier(&ipv6_dev_notf); |
6597 | ||
c15b1cca | 6598 | addrconf_verify(); |
c127ea2c | 6599 | |
3678a9d8 | 6600 | rtnl_af_register(&inet6_ops); |
b382b191 | 6601 | |
c7ac8679 | 6602 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo, |
b97bac64 | 6603 | 0); |
c127ea2c TG |
6604 | if (err < 0) |
6605 | goto errout; | |
6606 | ||
6607 | /* Only the first call to __rtnl_register can fail */ | |
b97bac64 FW |
6608 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, 0); |
6609 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, 0); | |
c7ac8679 | 6610 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, |
b97bac64 | 6611 | inet6_dump_ifaddr, 0); |
c7ac8679 | 6612 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, |
b97bac64 | 6613 | inet6_dump_ifmcaddr, 0); |
c7ac8679 | 6614 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, |
b97bac64 | 6615 | inet6_dump_ifacaddr, 0); |
76f8f6cb | 6616 | __rtnl_register(PF_INET6, RTM_GETNETCONF, inet6_netconf_get_devconf, |
b97bac64 | 6617 | inet6_netconf_dump_devconf, 0); |
c127ea2c | 6618 | |
2a8cc6c8 YH |
6619 | ipv6_addr_label_rtnl_register(); |
6620 | ||
1da177e4 | 6621 | return 0; |
c127ea2c | 6622 | errout: |
b382b191 | 6623 | rtnl_af_unregister(&inet6_ops); |
c127ea2c | 6624 | unregister_netdevice_notifier(&ipv6_dev_notf); |
e0da5a48 | 6625 | errlo: |
c15b1cca HFS |
6626 | destroy_workqueue(addrconf_wq); |
6627 | out_nowq: | |
e0da5a48 | 6628 | unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf NH |
6629 | out_addrlabel: |
6630 | ipv6_addr_label_cleanup(); | |
6631 | out: | |
c127ea2c | 6632 | return err; |
1da177e4 LT |
6633 | } |
6634 | ||
09f7709f | 6635 | void addrconf_cleanup(void) |
1da177e4 | 6636 | { |
176c39af | 6637 | struct net_device *dev; |
1da177e4 LT |
6638 | int i; |
6639 | ||
6640 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 | 6641 | unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf | 6642 | ipv6_addr_label_cleanup(); |
1da177e4 LT |
6643 | |
6644 | rtnl_lock(); | |
6645 | ||
b382b191 TG |
6646 | __rtnl_af_unregister(&inet6_ops); |
6647 | ||
176c39af DL |
6648 | /* clean dev list */ |
6649 | for_each_netdev(&init_net, dev) { | |
6650 | if (__in6_dev_get(dev) == NULL) | |
6651 | continue; | |
6652 | addrconf_ifdown(dev, 1); | |
6653 | } | |
6654 | addrconf_ifdown(init_net.loopback_dev, 2); | |
6655 | ||
1da177e4 LT |
6656 | /* |
6657 | * Check hash table. | |
6658 | */ | |
5c578aed | 6659 | spin_lock_bh(&addrconf_hash_lock); |
c2e21293 | 6660 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
6661 | WARN_ON(!hlist_empty(&inet6_addr_lst[i])); | |
5c578aed | 6662 | spin_unlock_bh(&addrconf_hash_lock); |
c15b1cca | 6663 | cancel_delayed_work(&addr_chk_work); |
1da177e4 | 6664 | rtnl_unlock(); |
c15b1cca HFS |
6665 | |
6666 | destroy_workqueue(addrconf_wq); | |
1da177e4 | 6667 | } |