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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * IPv6 Address [auto]configuration | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> |
8 | * | |
1da177e4 LT |
9 | * This program is free software; you can redistribute it and/or |
10 | * modify it under the terms of the GNU General Public License | |
11 | * as published by the Free Software Foundation; either version | |
12 | * 2 of the License, or (at your option) any later version. | |
13 | */ | |
14 | ||
15 | /* | |
16 | * Changes: | |
17 | * | |
18 | * Janos Farkas : delete timer on ifdown | |
19 | * <chexum@bankinf.banki.hu> | |
20 | * Andi Kleen : kill double kfree on module | |
21 | * unload. | |
22 | * Maciej W. Rozycki : FDDI support | |
23 | * sekiya@USAGI : Don't send too many RS | |
24 | * packets. | |
25 | * yoshfuji@USAGI : Fixed interval between DAD | |
26 | * packets. | |
27 | * YOSHIFUJI Hideaki @USAGI : improved accuracy of | |
28 | * address validation timer. | |
29 | * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041) | |
30 | * support. | |
31 | * Yuji SEKIYA @USAGI : Don't assign a same IPv6 | |
32 | * address on a same interface. | |
33 | * YOSHIFUJI Hideaki @USAGI : ARCnet support | |
34 | * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to | |
35 | * seq_file. | |
b1cacb68 YH |
36 | * YOSHIFUJI Hideaki @USAGI : improved source address |
37 | * selection; consider scope, | |
38 | * status etc. | |
1da177e4 LT |
39 | */ |
40 | ||
f3213831 JP |
41 | #define pr_fmt(fmt) "IPv6: " fmt |
42 | ||
1da177e4 LT |
43 | #include <linux/errno.h> |
44 | #include <linux/types.h> | |
a0bffffc | 45 | #include <linux/kernel.h> |
1da177e4 LT |
46 | #include <linux/socket.h> |
47 | #include <linux/sockios.h> | |
1da177e4 | 48 | #include <linux/net.h> |
3d1bec99 | 49 | #include <linux/inet.h> |
1da177e4 LT |
50 | #include <linux/in6.h> |
51 | #include <linux/netdevice.h> | |
1823730f | 52 | #include <linux/if_addr.h> |
1da177e4 LT |
53 | #include <linux/if_arp.h> |
54 | #include <linux/if_arcnet.h> | |
55 | #include <linux/if_infiniband.h> | |
56 | #include <linux/route.h> | |
57 | #include <linux/inetdevice.h> | |
58 | #include <linux/init.h> | |
5a0e3ad6 | 59 | #include <linux/slab.h> |
1da177e4 LT |
60 | #ifdef CONFIG_SYSCTL |
61 | #include <linux/sysctl.h> | |
62 | #endif | |
4fc268d2 | 63 | #include <linux/capability.h> |
1da177e4 LT |
64 | #include <linux/delay.h> |
65 | #include <linux/notifier.h> | |
543537bd | 66 | #include <linux/string.h> |
ddbe5032 | 67 | #include <linux/hash.h> |
1da177e4 | 68 | |
457c4cbc | 69 | #include <net/net_namespace.h> |
1da177e4 LT |
70 | #include <net/sock.h> |
71 | #include <net/snmp.h> | |
72 | ||
5241c2d7 | 73 | #include <net/6lowpan.h> |
cb6bf355 | 74 | #include <net/firewire.h> |
1da177e4 LT |
75 | #include <net/ipv6.h> |
76 | #include <net/protocol.h> | |
77 | #include <net/ndisc.h> | |
78 | #include <net/ip6_route.h> | |
79 | #include <net/addrconf.h> | |
80 | #include <net/tcp.h> | |
81 | #include <net/ip.h> | |
5d620266 | 82 | #include <net/netlink.h> |
f24e3d65 | 83 | #include <net/pkt_sched.h> |
ca254490 | 84 | #include <net/l3mdev.h> |
1da177e4 LT |
85 | #include <linux/if_tunnel.h> |
86 | #include <linux/rtnetlink.h> | |
f3a1bfb1 | 87 | #include <linux/netconf.h> |
1da177e4 | 88 | #include <linux/random.h> |
e21e8467 | 89 | #include <linux/uaccess.h> |
7f7d9a6b | 90 | #include <asm/unaligned.h> |
1da177e4 LT |
91 | |
92 | #include <linux/proc_fs.h> | |
93 | #include <linux/seq_file.h> | |
bc3b2d7f | 94 | #include <linux/export.h> |
1da177e4 LT |
95 | |
96 | /* Set to 3 to get tracing... */ | |
97 | #define ACONF_DEBUG 2 | |
98 | ||
99 | #if ACONF_DEBUG >= 3 | |
ba3542e1 | 100 | #define ADBG(fmt, ...) printk(fmt, ##__VA_ARGS__) |
1da177e4 | 101 | #else |
ba3542e1 | 102 | #define ADBG(fmt, ...) do { if (0) printk(fmt, ##__VA_ARGS__); } while (0) |
1da177e4 LT |
103 | #endif |
104 | ||
105 | #define INFINITY_LIFE_TIME 0xFFFFFFFF | |
18a31e1e | 106 | |
3d1bec99 HFS |
107 | #define IPV6_MAX_STRLEN \ |
108 | sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255") | |
109 | ||
18a31e1e TG |
110 | static inline u32 cstamp_delta(unsigned long cstamp) |
111 | { | |
112 | return (cstamp - INITIAL_JIFFIES) * 100UL / HZ; | |
113 | } | |
1da177e4 | 114 | |
bd11f074 MŻ |
115 | static inline s32 rfc3315_s14_backoff_init(s32 irt) |
116 | { | |
117 | /* multiply 'initial retransmission time' by 0.9 .. 1.1 */ | |
118 | u64 tmp = (900000 + prandom_u32() % 200001) * (u64)irt; | |
119 | do_div(tmp, 1000000); | |
120 | return (s32)tmp; | |
121 | } | |
122 | ||
123 | static inline s32 rfc3315_s14_backoff_update(s32 rt, s32 mrt) | |
124 | { | |
125 | /* multiply 'retransmission timeout' by 1.9 .. 2.1 */ | |
126 | u64 tmp = (1900000 + prandom_u32() % 200001) * (u64)rt; | |
127 | do_div(tmp, 1000000); | |
128 | if ((s32)tmp > mrt) { | |
129 | /* multiply 'maximum retransmission time' by 0.9 .. 1.1 */ | |
130 | tmp = (900000 + prandom_u32() % 200001) * (u64)mrt; | |
131 | do_div(tmp, 1000000); | |
132 | } | |
133 | return (s32)tmp; | |
134 | } | |
135 | ||
1da177e4 | 136 | #ifdef CONFIG_SYSCTL |
a317a2f1 | 137 | static int addrconf_sysctl_register(struct inet6_dev *idev); |
408c4768 PE |
138 | static void addrconf_sysctl_unregister(struct inet6_dev *idev); |
139 | #else | |
a317a2f1 | 140 | static inline int addrconf_sysctl_register(struct inet6_dev *idev) |
408c4768 | 141 | { |
a317a2f1 | 142 | return 0; |
408c4768 PE |
143 | } |
144 | ||
145 | static inline void addrconf_sysctl_unregister(struct inet6_dev *idev) | |
146 | { | |
147 | } | |
1da177e4 LT |
148 | #endif |
149 | ||
eb7e0575 SD |
150 | static void __ipv6_regen_rndid(struct inet6_dev *idev); |
151 | static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); | |
1da177e4 | 152 | static void ipv6_regen_rndid(unsigned long data); |
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); |
1da177e4 | 187 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); |
c5e33bdd | 188 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
189 | static void addrconf_rs_timer(unsigned long data); |
190 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
191 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
192 | ||
1ab1457c | 193 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 | 194 | struct prefix_info *pinfo); |
3e81c6da DM |
195 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
196 | struct net_device *dev); | |
1da177e4 | 197 | |
888c848e | 198 | static struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
199 | .forwarding = 0, |
200 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
201 | .mtu6 = IPV6_MIN_MTU, | |
202 | .accept_ra = 1, | |
203 | .accept_redirects = 1, | |
204 | .autoconf = 1, | |
205 | .force_mld_version = 0, | |
fc4eba58 HFS |
206 | .mldv1_unsolicited_report_interval = 10 * HZ, |
207 | .mldv2_unsolicited_report_interval = HZ, | |
1da177e4 LT |
208 | .dad_transmits = 1, |
209 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
210 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
bd11f074 | 211 | .rtr_solicit_max_interval = RTR_SOLICITATION_MAX_INTERVAL, |
1da177e4 | 212 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, |
67ba4152 | 213 | .use_tempaddr = 0, |
1da177e4 LT |
214 | .temp_valid_lft = TEMP_VALID_LIFETIME, |
215 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
216 | .regen_max_retry = REGEN_MAX_RETRY, | |
217 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
1da177e4 | 218 | .max_addresses = IPV6_MAX_ADDRESSES, |
65f5c7c1 | 219 | .accept_ra_defrtr = 1, |
d9333196 | 220 | .accept_ra_from_local = 0, |
8013d1d7 | 221 | .accept_ra_min_hop_limit= 1, |
c4fd30eb | 222 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
223 | #ifdef CONFIG_IPV6_ROUTER_PREF |
224 | .accept_ra_rtr_pref = 1, | |
52e16356 | 225 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
226 | #ifdef CONFIG_IPV6_ROUTE_INFO |
227 | .accept_ra_rt_info_max_plen = 0, | |
228 | #endif | |
930d6ff2 | 229 | #endif |
fbea49e1 | 230 | .proxy_ndp = 0, |
0bcbc926 | 231 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 232 | .disable_ipv6 = 0, |
1b34be74 | 233 | .accept_dad = 1, |
b800c3b9 | 234 | .suppress_frag_ndisc = 1, |
c2943f14 | 235 | .accept_ra_mtu = 1, |
3d1bec99 HFS |
236 | .stable_secret = { |
237 | .initialized = false, | |
3985e8a3 EK |
238 | }, |
239 | .use_oif_addrs_only = 0, | |
35103d11 | 240 | .ignore_routes_with_linkdown = 0, |
f1705ec1 | 241 | .keep_addr_on_down = 0, |
1da177e4 LT |
242 | }; |
243 | ||
ab32ea5d | 244 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
245 | .forwarding = 0, |
246 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
247 | .mtu6 = IPV6_MIN_MTU, | |
248 | .accept_ra = 1, | |
249 | .accept_redirects = 1, | |
250 | .autoconf = 1, | |
fc4eba58 HFS |
251 | .force_mld_version = 0, |
252 | .mldv1_unsolicited_report_interval = 10 * HZ, | |
253 | .mldv2_unsolicited_report_interval = HZ, | |
1da177e4 LT |
254 | .dad_transmits = 1, |
255 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
256 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
bd11f074 | 257 | .rtr_solicit_max_interval = RTR_SOLICITATION_MAX_INTERVAL, |
1da177e4 | 258 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, |
1da177e4 LT |
259 | .use_tempaddr = 0, |
260 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
261 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
262 | .regen_max_retry = REGEN_MAX_RETRY, | |
263 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
1da177e4 | 264 | .max_addresses = IPV6_MAX_ADDRESSES, |
65f5c7c1 | 265 | .accept_ra_defrtr = 1, |
d9333196 | 266 | .accept_ra_from_local = 0, |
8013d1d7 | 267 | .accept_ra_min_hop_limit= 1, |
c4fd30eb | 268 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
269 | #ifdef CONFIG_IPV6_ROUTER_PREF |
270 | .accept_ra_rtr_pref = 1, | |
52e16356 | 271 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
272 | #ifdef CONFIG_IPV6_ROUTE_INFO |
273 | .accept_ra_rt_info_max_plen = 0, | |
274 | #endif | |
930d6ff2 | 275 | #endif |
fbea49e1 | 276 | .proxy_ndp = 0, |
0bcbc926 | 277 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 278 | .disable_ipv6 = 0, |
1b34be74 | 279 | .accept_dad = 1, |
b800c3b9 | 280 | .suppress_frag_ndisc = 1, |
c2943f14 | 281 | .accept_ra_mtu = 1, |
3d1bec99 HFS |
282 | .stable_secret = { |
283 | .initialized = false, | |
284 | }, | |
3985e8a3 | 285 | .use_oif_addrs_only = 0, |
35103d11 | 286 | .ignore_routes_with_linkdown = 0, |
f1705ec1 | 287 | .keep_addr_on_down = 0, |
1da177e4 LT |
288 | }; |
289 | ||
f24e3d65 | 290 | /* Check if a valid qdisc is available */ |
05297949 | 291 | static inline bool addrconf_qdisc_ok(const struct net_device *dev) |
f24e3d65 | 292 | { |
05297949 | 293 | return !qdisc_tx_is_noop(dev); |
f24e3d65 MC |
294 | } |
295 | ||
b7b1bfce | 296 | static void addrconf_del_rs_timer(struct inet6_dev *idev) |
1da177e4 | 297 | { |
b7b1bfce HFS |
298 | if (del_timer(&idev->rs_timer)) |
299 | __in6_dev_put(idev); | |
300 | } | |
301 | ||
c15b1cca | 302 | static void addrconf_del_dad_work(struct inet6_ifaddr *ifp) |
b7b1bfce | 303 | { |
c15b1cca | 304 | if (cancel_delayed_work(&ifp->dad_work)) |
1da177e4 LT |
305 | __in6_ifa_put(ifp); |
306 | } | |
307 | ||
b7b1bfce HFS |
308 | static void addrconf_mod_rs_timer(struct inet6_dev *idev, |
309 | unsigned long when) | |
310 | { | |
311 | if (!timer_pending(&idev->rs_timer)) | |
312 | in6_dev_hold(idev); | |
313 | mod_timer(&idev->rs_timer, jiffies + when); | |
314 | } | |
1da177e4 | 315 | |
c15b1cca HFS |
316 | static void addrconf_mod_dad_work(struct inet6_ifaddr *ifp, |
317 | unsigned long delay) | |
1da177e4 | 318 | { |
c15b1cca | 319 | if (!delayed_work_pending(&ifp->dad_work)) |
1da177e4 | 320 | in6_ifa_hold(ifp); |
c15b1cca | 321 | mod_delayed_work(addrconf_wq, &ifp->dad_work, delay); |
1da177e4 LT |
322 | } |
323 | ||
7f7d9a6b HX |
324 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
325 | { | |
827da44c JS |
326 | int i; |
327 | ||
698365fa WC |
328 | idev->stats.ipv6 = alloc_percpu(struct ipstats_mib); |
329 | if (!idev->stats.ipv6) | |
7f7d9a6b | 330 | goto err_ip; |
827da44c JS |
331 | |
332 | for_each_possible_cpu(i) { | |
333 | struct ipstats_mib *addrconf_stats; | |
698365fa | 334 | addrconf_stats = per_cpu_ptr(idev->stats.ipv6, i); |
827da44c | 335 | u64_stats_init(&addrconf_stats->syncp); |
827da44c JS |
336 | } |
337 | ||
338 | ||
be281e55 ED |
339 | idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device), |
340 | GFP_KERNEL); | |
341 | if (!idev->stats.icmpv6dev) | |
7f7d9a6b | 342 | goto err_icmp; |
be281e55 ED |
343 | idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device), |
344 | GFP_KERNEL); | |
345 | if (!idev->stats.icmpv6msgdev) | |
14878f75 | 346 | goto err_icmpmsg; |
7f7d9a6b HX |
347 | |
348 | return 0; | |
349 | ||
14878f75 | 350 | err_icmpmsg: |
be281e55 | 351 | kfree(idev->stats.icmpv6dev); |
7f7d9a6b | 352 | err_icmp: |
698365fa | 353 | free_percpu(idev->stats.ipv6); |
7f7d9a6b | 354 | err_ip: |
aaf70ec7 | 355 | return -ENOMEM; |
7f7d9a6b HX |
356 | } |
357 | ||
8e5e8f30 | 358 | static struct inet6_dev *ipv6_add_dev(struct net_device *dev) |
1da177e4 LT |
359 | { |
360 | struct inet6_dev *ndev; | |
a317a2f1 | 361 | int err = -ENOMEM; |
1da177e4 LT |
362 | |
363 | ASSERT_RTNL(); | |
364 | ||
365 | if (dev->mtu < IPV6_MIN_MTU) | |
a317a2f1 | 366 | return ERR_PTR(-EINVAL); |
1da177e4 | 367 | |
1ab1457c | 368 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
63159f29 | 369 | if (!ndev) |
a317a2f1 | 370 | return ERR_PTR(err); |
322f74a4 IO |
371 | |
372 | rwlock_init(&ndev->lock); | |
373 | ndev->dev = dev; | |
502a2ffd | 374 | INIT_LIST_HEAD(&ndev->addr_list); |
b7b1bfce HFS |
375 | setup_timer(&ndev->rs_timer, addrconf_rs_timer, |
376 | (unsigned long)ndev); | |
c346dca1 | 377 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
9b29c696 HFS |
378 | |
379 | if (ndev->cnf.stable_secret.initialized) | |
380 | ndev->addr_gen_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY; | |
381 | else | |
382 | ndev->addr_gen_mode = IN6_ADDR_GEN_MODE_EUI64; | |
383 | ||
322f74a4 | 384 | ndev->cnf.mtu6 = dev->mtu; |
322f74a4 | 385 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); |
63159f29 | 386 | if (!ndev->nd_parms) { |
322f74a4 | 387 | kfree(ndev); |
a317a2f1 | 388 | return ERR_PTR(err); |
322f74a4 | 389 | } |
0187bdfb BH |
390 | if (ndev->cnf.forwarding) |
391 | dev_disable_lro(dev); | |
322f74a4 IO |
392 | /* We refer to the device */ |
393 | dev_hold(dev); | |
1da177e4 | 394 | |
322f74a4 | 395 | if (snmp6_alloc_dev(ndev) < 0) { |
ba3542e1 | 396 | ADBG(KERN_WARNING |
f3213831 | 397 | "%s: cannot allocate memory for statistics; dev=%s.\n", |
ba3542e1 | 398 | __func__, dev->name); |
322f74a4 | 399 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
8603e33d RL |
400 | dev_put(dev); |
401 | kfree(ndev); | |
a317a2f1 | 402 | return ERR_PTR(err); |
322f74a4 | 403 | } |
1da177e4 | 404 | |
322f74a4 | 405 | if (snmp6_register_dev(ndev) < 0) { |
ba3542e1 | 406 | ADBG(KERN_WARNING |
f3213831 | 407 | "%s: cannot create /proc/net/dev_snmp6/%s\n", |
ba3542e1 | 408 | __func__, dev->name); |
a317a2f1 | 409 | goto err_release; |
322f74a4 IO |
410 | } |
411 | ||
412 | /* One reference from device. We must do this before | |
413 | * we invoke __ipv6_regen_rndid(). | |
414 | */ | |
415 | in6_dev_hold(ndev); | |
1da177e4 | 416 | |
1b34be74 YH |
417 | if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) |
418 | ndev->cnf.accept_dad = -1; | |
419 | ||
07a93626 | 420 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
b077d7ab | 421 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { |
f3213831 | 422 | pr_info("%s: Disabled Multicast RS\n", dev->name); |
b077d7ab YH |
423 | ndev->cnf.rtr_solicits = 0; |
424 | } | |
425 | #endif | |
426 | ||
372e6c8f | 427 | INIT_LIST_HEAD(&ndev->tempaddr_list); |
b24b8a24 | 428 | setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
322f74a4 IO |
429 | if ((dev->flags&IFF_LOOPBACK) || |
430 | dev->type == ARPHRD_TUNNEL || | |
9625ed72 | 431 | dev->type == ARPHRD_TUNNEL6 || |
0be669bb | 432 | dev->type == ARPHRD_SIT || |
0be669bb | 433 | dev->type == ARPHRD_NONE) { |
322f74a4 IO |
434 | ndev->cnf.use_tempaddr = -1; |
435 | } else { | |
436 | in6_dev_hold(ndev); | |
437 | ipv6_regen_rndid((unsigned long) ndev); | |
438 | } | |
5d9efa7e | 439 | |
914faa14 | 440 | ndev->token = in6addr_any; |
1da177e4 | 441 | |
f24e3d65 | 442 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
53aadcc9 HX |
443 | ndev->if_flags |= IF_READY; |
444 | ||
322f74a4 IO |
445 | ipv6_mc_init_dev(ndev); |
446 | ndev->tstamp = jiffies; | |
a317a2f1 WC |
447 | err = addrconf_sysctl_register(ndev); |
448 | if (err) { | |
449 | ipv6_mc_destroy_dev(ndev); | |
450 | del_timer(&ndev->regen_timer); | |
2a189f9e | 451 | snmp6_unregister_dev(ndev); |
a317a2f1 WC |
452 | goto err_release; |
453 | } | |
30c4cf57 | 454 | /* protected by rtnl_lock */ |
cf778b00 | 455 | rcu_assign_pointer(dev->ip6_ptr, ndev); |
d88ae4cc | 456 | |
2c5e8933 HFS |
457 | /* Join interface-local all-node multicast group */ |
458 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allnodes); | |
459 | ||
d88ae4cc | 460 | /* Join all-node multicast group */ |
f3ee4010 | 461 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
d88ae4cc | 462 | |
d6ddef9e | 463 | /* Join all-router multicast group if forwarding is set */ |
8b2aaede | 464 | if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST)) |
d6ddef9e LW |
465 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
466 | ||
1da177e4 | 467 | return ndev; |
a317a2f1 WC |
468 | |
469 | err_release: | |
470 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
471 | ndev->dead = 1; | |
472 | in6_dev_finish_destroy(ndev); | |
473 | return ERR_PTR(err); | |
1da177e4 LT |
474 | } |
475 | ||
8e5e8f30 | 476 | static struct inet6_dev *ipv6_find_idev(struct net_device *dev) |
1da177e4 LT |
477 | { |
478 | struct inet6_dev *idev; | |
479 | ||
480 | ASSERT_RTNL(); | |
481 | ||
e21e8467 SH |
482 | idev = __in6_dev_get(dev); |
483 | if (!idev) { | |
484 | idev = ipv6_add_dev(dev); | |
a317a2f1 | 485 | if (IS_ERR(idev)) |
1da177e4 LT |
486 | return NULL; |
487 | } | |
c5e33bdd | 488 | |
1da177e4 LT |
489 | if (dev->flags&IFF_UP) |
490 | ipv6_mc_up(idev); | |
491 | return idev; | |
492 | } | |
493 | ||
f3a1bfb1 ND |
494 | static int inet6_netconf_msgsize_devconf(int type) |
495 | { | |
496 | int size = NLMSG_ALIGN(sizeof(struct netconfmsg)) | |
497 | + nla_total_size(4); /* NETCONFA_IFINDEX */ | |
136ba622 | 498 | bool all = false; |
f3a1bfb1 | 499 | |
136ba622 ZS |
500 | if (type == NETCONFA_ALL) |
501 | all = true; | |
502 | ||
503 | if (all || type == NETCONFA_FORWARDING) | |
f3a1bfb1 | 504 | size += nla_total_size(4); |
b1afce95 | 505 | #ifdef CONFIG_IPV6_MROUTE |
136ba622 | 506 | if (all || type == NETCONFA_MC_FORWARDING) |
d67b8c61 | 507 | size += nla_total_size(4); |
b1afce95 | 508 | #endif |
136ba622 | 509 | if (all || type == NETCONFA_PROXY_NEIGH) |
c92d5491 | 510 | size += nla_total_size(4); |
f3a1bfb1 | 511 | |
136ba622 | 512 | if (all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) |
35103d11 AG |
513 | size += nla_total_size(4); |
514 | ||
f3a1bfb1 ND |
515 | return size; |
516 | } | |
517 | ||
518 | static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex, | |
519 | struct ipv6_devconf *devconf, u32 portid, | |
520 | u32 seq, int event, unsigned int flags, | |
521 | int type) | |
522 | { | |
523 | struct nlmsghdr *nlh; | |
524 | struct netconfmsg *ncm; | |
136ba622 | 525 | bool all = false; |
f3a1bfb1 ND |
526 | |
527 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg), | |
528 | flags); | |
63159f29 | 529 | if (!nlh) |
f3a1bfb1 ND |
530 | return -EMSGSIZE; |
531 | ||
136ba622 ZS |
532 | if (type == NETCONFA_ALL) |
533 | all = true; | |
534 | ||
f3a1bfb1 ND |
535 | ncm = nlmsg_data(nlh); |
536 | ncm->ncm_family = AF_INET6; | |
537 | ||
538 | if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0) | |
539 | goto nla_put_failure; | |
540 | ||
136ba622 | 541 | if ((all || type == NETCONFA_FORWARDING) && |
f3a1bfb1 ND |
542 | nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0) |
543 | goto nla_put_failure; | |
b1afce95 | 544 | #ifdef CONFIG_IPV6_MROUTE |
136ba622 | 545 | if ((all || type == NETCONFA_MC_FORWARDING) && |
d67b8c61 ND |
546 | nla_put_s32(skb, NETCONFA_MC_FORWARDING, |
547 | devconf->mc_forwarding) < 0) | |
548 | goto nla_put_failure; | |
b1afce95 | 549 | #endif |
136ba622 | 550 | if ((all || type == NETCONFA_PROXY_NEIGH) && |
c92d5491 | 551 | nla_put_s32(skb, NETCONFA_PROXY_NEIGH, devconf->proxy_ndp) < 0) |
552 | goto nla_put_failure; | |
553 | ||
136ba622 | 554 | if ((all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) && |
35103d11 AG |
555 | nla_put_s32(skb, NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, |
556 | devconf->ignore_routes_with_linkdown) < 0) | |
557 | goto nla_put_failure; | |
558 | ||
053c095a JB |
559 | nlmsg_end(skb, nlh); |
560 | return 0; | |
f3a1bfb1 ND |
561 | |
562 | nla_put_failure: | |
563 | nlmsg_cancel(skb, nlh); | |
564 | return -EMSGSIZE; | |
565 | } | |
566 | ||
d67b8c61 ND |
567 | void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex, |
568 | struct ipv6_devconf *devconf) | |
f3a1bfb1 ND |
569 | { |
570 | struct sk_buff *skb; | |
571 | int err = -ENOBUFS; | |
572 | ||
927265bc | 573 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(type), GFP_KERNEL); |
63159f29 | 574 | if (!skb) |
f3a1bfb1 ND |
575 | goto errout; |
576 | ||
577 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, 0, 0, | |
578 | RTM_NEWNETCONF, 0, type); | |
579 | if (err < 0) { | |
580 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
581 | WARN_ON(err == -EMSGSIZE); | |
582 | kfree_skb(skb); | |
583 | goto errout; | |
584 | } | |
927265bc | 585 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_NETCONF, NULL, GFP_KERNEL); |
f3a1bfb1 ND |
586 | return; |
587 | errout: | |
bd779028 | 588 | rtnl_set_sk_err(net, RTNLGRP_IPV6_NETCONF, err); |
f3a1bfb1 ND |
589 | } |
590 | ||
76f8f6cb ND |
591 | static const struct nla_policy devconf_ipv6_policy[NETCONFA_MAX+1] = { |
592 | [NETCONFA_IFINDEX] = { .len = sizeof(int) }, | |
593 | [NETCONFA_FORWARDING] = { .len = sizeof(int) }, | |
c92d5491 | 594 | [NETCONFA_PROXY_NEIGH] = { .len = sizeof(int) }, |
35103d11 | 595 | [NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN] = { .len = sizeof(int) }, |
76f8f6cb ND |
596 | }; |
597 | ||
598 | static int inet6_netconf_get_devconf(struct sk_buff *in_skb, | |
661d2967 | 599 | struct nlmsghdr *nlh) |
76f8f6cb ND |
600 | { |
601 | struct net *net = sock_net(in_skb->sk); | |
602 | struct nlattr *tb[NETCONFA_MAX+1]; | |
603 | struct netconfmsg *ncm; | |
604 | struct sk_buff *skb; | |
605 | struct ipv6_devconf *devconf; | |
606 | struct inet6_dev *in6_dev; | |
607 | struct net_device *dev; | |
608 | int ifindex; | |
609 | int err; | |
610 | ||
611 | err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX, | |
612 | devconf_ipv6_policy); | |
613 | if (err < 0) | |
614 | goto errout; | |
615 | ||
a97eb33f | 616 | err = -EINVAL; |
76f8f6cb ND |
617 | if (!tb[NETCONFA_IFINDEX]) |
618 | goto errout; | |
619 | ||
620 | ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]); | |
621 | switch (ifindex) { | |
622 | case NETCONFA_IFINDEX_ALL: | |
623 | devconf = net->ipv6.devconf_all; | |
624 | break; | |
625 | case NETCONFA_IFINDEX_DEFAULT: | |
626 | devconf = net->ipv6.devconf_dflt; | |
627 | break; | |
628 | default: | |
629 | dev = __dev_get_by_index(net, ifindex); | |
63159f29 | 630 | if (!dev) |
76f8f6cb ND |
631 | goto errout; |
632 | in6_dev = __in6_dev_get(dev); | |
63159f29 | 633 | if (!in6_dev) |
76f8f6cb ND |
634 | goto errout; |
635 | devconf = &in6_dev->cnf; | |
636 | break; | |
637 | } | |
638 | ||
639 | err = -ENOBUFS; | |
136ba622 | 640 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(NETCONFA_ALL), GFP_ATOMIC); |
63159f29 | 641 | if (!skb) |
76f8f6cb ND |
642 | goto errout; |
643 | ||
644 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, | |
645 | NETLINK_CB(in_skb).portid, | |
646 | nlh->nlmsg_seq, RTM_NEWNETCONF, 0, | |
136ba622 | 647 | NETCONFA_ALL); |
76f8f6cb ND |
648 | if (err < 0) { |
649 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
650 | WARN_ON(err == -EMSGSIZE); | |
651 | kfree_skb(skb); | |
652 | goto errout; | |
653 | } | |
654 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); | |
655 | errout: | |
656 | return err; | |
657 | } | |
658 | ||
7a674200 ND |
659 | static int inet6_netconf_dump_devconf(struct sk_buff *skb, |
660 | struct netlink_callback *cb) | |
661 | { | |
662 | struct net *net = sock_net(skb->sk); | |
663 | int h, s_h; | |
664 | int idx, s_idx; | |
665 | struct net_device *dev; | |
666 | struct inet6_dev *idev; | |
667 | struct hlist_head *head; | |
668 | ||
669 | s_h = cb->args[0]; | |
670 | s_idx = idx = cb->args[1]; | |
671 | ||
672 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
673 | idx = 0; | |
674 | head = &net->dev_index_head[h]; | |
675 | rcu_read_lock(); | |
63998ac2 ND |
676 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ |
677 | net->dev_base_seq; | |
7a674200 ND |
678 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
679 | if (idx < s_idx) | |
680 | goto cont; | |
681 | idev = __in6_dev_get(dev); | |
682 | if (!idev) | |
683 | goto cont; | |
684 | ||
685 | if (inet6_netconf_fill_devconf(skb, dev->ifindex, | |
686 | &idev->cnf, | |
687 | NETLINK_CB(cb->skb).portid, | |
688 | cb->nlh->nlmsg_seq, | |
689 | RTM_NEWNETCONF, | |
690 | NLM_F_MULTI, | |
136ba622 | 691 | NETCONFA_ALL) < 0) { |
7a674200 ND |
692 | rcu_read_unlock(); |
693 | goto done; | |
694 | } | |
63998ac2 | 695 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
7a674200 ND |
696 | cont: |
697 | idx++; | |
698 | } | |
699 | rcu_read_unlock(); | |
700 | } | |
701 | if (h == NETDEV_HASHENTRIES) { | |
702 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL, | |
703 | net->ipv6.devconf_all, | |
704 | NETLINK_CB(cb->skb).portid, | |
705 | cb->nlh->nlmsg_seq, | |
706 | RTM_NEWNETCONF, NLM_F_MULTI, | |
136ba622 | 707 | NETCONFA_ALL) < 0) |
7a674200 ND |
708 | goto done; |
709 | else | |
710 | h++; | |
711 | } | |
712 | if (h == NETDEV_HASHENTRIES + 1) { | |
713 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT, | |
714 | net->ipv6.devconf_dflt, | |
715 | NETLINK_CB(cb->skb).portid, | |
716 | cb->nlh->nlmsg_seq, | |
717 | RTM_NEWNETCONF, NLM_F_MULTI, | |
136ba622 | 718 | NETCONFA_ALL) < 0) |
7a674200 ND |
719 | goto done; |
720 | else | |
721 | h++; | |
722 | } | |
723 | done: | |
724 | cb->args[0] = h; | |
725 | cb->args[1] = idx; | |
726 | ||
727 | return skb->len; | |
728 | } | |
729 | ||
1da177e4 LT |
730 | #ifdef CONFIG_SYSCTL |
731 | static void dev_forward_change(struct inet6_dev *idev) | |
732 | { | |
733 | struct net_device *dev; | |
734 | struct inet6_ifaddr *ifa; | |
1da177e4 LT |
735 | |
736 | if (!idev) | |
737 | return; | |
738 | dev = idev->dev; | |
0187bdfb BH |
739 | if (idev->cnf.forwarding) |
740 | dev_disable_lro(dev); | |
1a940835 | 741 | if (dev->flags & IFF_MULTICAST) { |
2c5e8933 | 742 | if (idev->cnf.forwarding) { |
f3ee4010 | 743 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
744 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allrouters); |
745 | ipv6_dev_mc_inc(dev, &in6addr_sitelocal_allrouters); | |
746 | } else { | |
f3ee4010 | 747 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
748 | ipv6_dev_mc_dec(dev, &in6addr_interfacelocal_allrouters); |
749 | ipv6_dev_mc_dec(dev, &in6addr_sitelocal_allrouters); | |
750 | } | |
1da177e4 | 751 | } |
502a2ffd | 752 | |
753 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
2c12a74c MW |
754 | if (ifa->flags&IFA_F_TENTATIVE) |
755 | continue; | |
1da177e4 LT |
756 | if (idev->cnf.forwarding) |
757 | addrconf_join_anycast(ifa); | |
758 | else | |
759 | addrconf_leave_anycast(ifa); | |
760 | } | |
f3a1bfb1 ND |
761 | inet6_netconf_notify_devconf(dev_net(dev), NETCONFA_FORWARDING, |
762 | dev->ifindex, &idev->cnf); | |
1da177e4 LT |
763 | } |
764 | ||
765 | ||
e186932b | 766 | static void addrconf_forward_change(struct net *net, __s32 newf) |
1da177e4 LT |
767 | { |
768 | struct net_device *dev; | |
769 | struct inet6_dev *idev; | |
770 | ||
4acd4945 | 771 | for_each_netdev(net, dev) { |
1da177e4 LT |
772 | idev = __in6_dev_get(dev); |
773 | if (idev) { | |
e186932b PE |
774 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
775 | idev->cnf.forwarding = newf; | |
1da177e4 LT |
776 | if (changed) |
777 | dev_forward_change(idev); | |
778 | } | |
1da177e4 | 779 | } |
1da177e4 | 780 | } |
c8fecf22 | 781 | |
013d97e9 | 782 | static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf) |
c8fecf22 | 783 | { |
bff16c2f | 784 | struct net *net; |
013d97e9 FR |
785 | int old; |
786 | ||
787 | if (!rtnl_trylock()) | |
788 | return restart_syscall(); | |
bff16c2f PE |
789 | |
790 | net = (struct net *)table->extra2; | |
013d97e9 FR |
791 | old = *p; |
792 | *p = newf; | |
b325fddb | 793 | |
013d97e9 | 794 | if (p == &net->ipv6.devconf_dflt->forwarding) { |
f3a1bfb1 ND |
795 | if ((!newf) ^ (!old)) |
796 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
797 | NETCONFA_IFINDEX_DEFAULT, | |
798 | net->ipv6.devconf_dflt); | |
013d97e9 FR |
799 | rtnl_unlock(); |
800 | return 0; | |
88af182e | 801 | } |
c8fecf22 | 802 | |
e186932b | 803 | if (p == &net->ipv6.devconf_all->forwarding) { |
d26c638c ND |
804 | int old_dflt = net->ipv6.devconf_dflt->forwarding; |
805 | ||
e186932b | 806 | net->ipv6.devconf_dflt->forwarding = newf; |
d26c638c ND |
807 | if ((!newf) ^ (!old_dflt)) |
808 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
809 | NETCONFA_IFINDEX_DEFAULT, | |
810 | net->ipv6.devconf_dflt); | |
811 | ||
e186932b | 812 | addrconf_forward_change(net, newf); |
f3a1bfb1 ND |
813 | if ((!newf) ^ (!old)) |
814 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
815 | NETCONFA_IFINDEX_ALL, | |
816 | net->ipv6.devconf_all); | |
013d97e9 | 817 | } else if ((!newf) ^ (!old)) |
c8fecf22 | 818 | dev_forward_change((struct inet6_dev *)table->extra1); |
0187bdfb | 819 | rtnl_unlock(); |
c8fecf22 | 820 | |
013d97e9 | 821 | if (newf) |
7b4da532 | 822 | rt6_purge_dflt_routers(net); |
b325fddb | 823 | return 1; |
c8fecf22 | 824 | } |
35103d11 AG |
825 | |
826 | static void addrconf_linkdown_change(struct net *net, __s32 newf) | |
827 | { | |
828 | struct net_device *dev; | |
829 | struct inet6_dev *idev; | |
830 | ||
831 | for_each_netdev(net, dev) { | |
832 | idev = __in6_dev_get(dev); | |
833 | if (idev) { | |
834 | int changed = (!idev->cnf.ignore_routes_with_linkdown) ^ (!newf); | |
835 | ||
836 | idev->cnf.ignore_routes_with_linkdown = newf; | |
837 | if (changed) | |
838 | inet6_netconf_notify_devconf(dev_net(dev), | |
839 | NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, | |
840 | dev->ifindex, | |
841 | &idev->cnf); | |
842 | } | |
843 | } | |
844 | } | |
845 | ||
846 | static int addrconf_fixup_linkdown(struct ctl_table *table, int *p, int newf) | |
847 | { | |
848 | struct net *net; | |
849 | int old; | |
850 | ||
851 | if (!rtnl_trylock()) | |
852 | return restart_syscall(); | |
853 | ||
854 | net = (struct net *)table->extra2; | |
855 | old = *p; | |
856 | *p = newf; | |
857 | ||
858 | if (p == &net->ipv6.devconf_dflt->ignore_routes_with_linkdown) { | |
859 | if ((!newf) ^ (!old)) | |
860 | inet6_netconf_notify_devconf(net, | |
861 | NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, | |
862 | NETCONFA_IFINDEX_DEFAULT, | |
863 | net->ipv6.devconf_dflt); | |
864 | rtnl_unlock(); | |
865 | return 0; | |
866 | } | |
867 | ||
868 | if (p == &net->ipv6.devconf_all->ignore_routes_with_linkdown) { | |
869 | net->ipv6.devconf_dflt->ignore_routes_with_linkdown = newf; | |
870 | addrconf_linkdown_change(net, newf); | |
871 | if ((!newf) ^ (!old)) | |
872 | inet6_netconf_notify_devconf(net, | |
873 | NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, | |
874 | NETCONFA_IFINDEX_ALL, | |
875 | net->ipv6.devconf_all); | |
876 | } | |
877 | rtnl_unlock(); | |
878 | ||
879 | return 1; | |
880 | } | |
881 | ||
1da177e4 LT |
882 | #endif |
883 | ||
5c578aed | 884 | /* Nobody refers to this ifaddr, destroy it */ |
1da177e4 LT |
885 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) |
886 | { | |
c2e21293 | 887 | WARN_ON(!hlist_unhashed(&ifp->addr_lst)); |
547b792c | 888 | |
1da177e4 | 889 | #ifdef NET_REFCNT_DEBUG |
91df42be | 890 | pr_debug("%s\n", __func__); |
1da177e4 LT |
891 | #endif |
892 | ||
893 | in6_dev_put(ifp->idev); | |
894 | ||
c15b1cca HFS |
895 | if (cancel_delayed_work(&ifp->dad_work)) |
896 | pr_notice("delayed DAD work was pending while freeing ifa=%p\n", | |
897 | ifp); | |
1da177e4 | 898 | |
e9d3e084 | 899 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
f3213831 | 900 | pr_warn("Freeing alive inet6 address %p\n", ifp); |
1da177e4 LT |
901 | return; |
902 | } | |
94e187c0 | 903 | ip6_rt_put(ifp->rt); |
1da177e4 | 904 | |
e5785985 | 905 | kfree_rcu(ifp, rcu); |
1da177e4 LT |
906 | } |
907 | ||
e55ffac6 BH |
908 | static void |
909 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
910 | { | |
502a2ffd | 911 | struct list_head *p; |
8a6ce0c0 | 912 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
913 | |
914 | /* | |
915 | * Each device address list is sorted in order of scope - | |
916 | * global before linklocal. | |
917 | */ | |
502a2ffd | 918 | list_for_each(p, &idev->addr_list) { |
919 | struct inet6_ifaddr *ifa | |
920 | = list_entry(p, struct inet6_ifaddr, if_list); | |
8a6ce0c0 | 921 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
922 | break; |
923 | } | |
924 | ||
b54c9b98 | 925 | list_add_tail(&ifp->if_list, p); |
e55ffac6 BH |
926 | } |
927 | ||
ddbe5032 | 928 | static u32 inet6_addr_hash(const struct in6_addr *addr) |
3eb84f49 | 929 | { |
ddbe5032 | 930 | return hash_32(ipv6_addr_hash(addr), IN6_ADDR_HSIZE_SHIFT); |
3eb84f49 YH |
931 | } |
932 | ||
1da177e4 LT |
933 | /* On success it returns ifp with increased reference count */ |
934 | ||
935 | static struct inet6_ifaddr * | |
3f8f5298 JP |
936 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
937 | const struct in6_addr *peer_addr, int pfxlen, | |
8a226b2c | 938 | int scope, u32 flags, u32 valid_lft, u32 prefered_lft) |
1da177e4 LT |
939 | { |
940 | struct inet6_ifaddr *ifa = NULL; | |
941 | struct rt6_info *rt; | |
3a88a81d | 942 | unsigned int hash; |
1da177e4 | 943 | int err = 0; |
d68b8270 YH |
944 | int addr_type = ipv6_addr_type(addr); |
945 | ||
946 | if (addr_type == IPV6_ADDR_ANY || | |
947 | addr_type & IPV6_ADDR_MULTICAST || | |
948 | (!(idev->dev->flags & IFF_LOOPBACK) && | |
949 | addr_type & IPV6_ADDR_LOOPBACK)) | |
950 | return ERR_PTR(-EADDRNOTAVAIL); | |
1da177e4 | 951 | |
8814c4b5 | 952 | rcu_read_lock_bh(); |
1da177e4 LT |
953 | if (idev->dead) { |
954 | err = -ENODEV; /*XXX*/ | |
955 | goto out2; | |
956 | } | |
957 | ||
56d417b1 | 958 | if (idev->cnf.disable_ipv6) { |
9bdd8d40 BH |
959 | err = -EACCES; |
960 | goto out2; | |
961 | } | |
962 | ||
5c578aed | 963 | spin_lock(&addrconf_hash_lock); |
1da177e4 LT |
964 | |
965 | /* Ignore adding duplicate addresses on an interface */ | |
c346dca1 | 966 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
ba3542e1 | 967 | ADBG("ipv6_add_addr: already assigned\n"); |
1da177e4 LT |
968 | err = -EEXIST; |
969 | goto out; | |
970 | } | |
971 | ||
322f74a4 | 972 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 | 973 | |
63159f29 | 974 | if (!ifa) { |
ba3542e1 | 975 | ADBG("ipv6_add_addr: malloc failed\n"); |
1da177e4 LT |
976 | err = -ENOBUFS; |
977 | goto out; | |
978 | } | |
979 | ||
8f031519 | 980 | rt = addrconf_dst_alloc(idev, addr, false); |
1da177e4 LT |
981 | if (IS_ERR(rt)) { |
982 | err = PTR_ERR(rt); | |
983 | goto out; | |
984 | } | |
985 | ||
bba24896 JP |
986 | neigh_parms_data_state_setall(idev->nd_parms); |
987 | ||
4e3fd7a0 | 988 | ifa->addr = *addr; |
3f8f5298 JP |
989 | if (peer_addr) |
990 | ifa->peer_addr = *peer_addr; | |
1da177e4 LT |
991 | |
992 | spin_lock_init(&ifa->lock); | |
c15b1cca | 993 | INIT_DELAYED_WORK(&ifa->dad_work, addrconf_dad_work); |
c2e21293 | 994 | INIT_HLIST_NODE(&ifa->addr_lst); |
1da177e4 LT |
995 | ifa->scope = scope; |
996 | ifa->prefix_len = pfxlen; | |
997 | ifa->flags = flags | IFA_F_TENTATIVE; | |
8a226b2c JB |
998 | ifa->valid_lft = valid_lft; |
999 | ifa->prefered_lft = prefered_lft; | |
1da177e4 | 1000 | ifa->cstamp = ifa->tstamp = jiffies; |
617fe29d | 1001 | ifa->tokenized = false; |
1da177e4 | 1002 | |
57f5f544 KF |
1003 | ifa->rt = rt; |
1004 | ||
1da177e4 LT |
1005 | ifa->idev = idev; |
1006 | in6_dev_hold(idev); | |
1007 | /* For caller */ | |
1008 | in6_ifa_hold(ifa); | |
1009 | ||
1010 | /* Add to big hash table */ | |
ddbe5032 | 1011 | hash = inet6_addr_hash(addr); |
1da177e4 | 1012 | |
5c578aed | 1013 | hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]); |
5c578aed | 1014 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
1015 | |
1016 | write_lock(&idev->lock); | |
1017 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 1018 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 | 1019 | |
1da177e4 | 1020 | if (ifa->flags&IFA_F_TEMPORARY) { |
372e6c8f | 1021 | list_add(&ifa->tmp_list, &idev->tempaddr_list); |
1da177e4 LT |
1022 | in6_ifa_hold(ifa); |
1023 | } | |
1da177e4 | 1024 | |
1da177e4 LT |
1025 | in6_ifa_hold(ifa); |
1026 | write_unlock(&idev->lock); | |
1027 | out2: | |
8814c4b5 | 1028 | rcu_read_unlock_bh(); |
1da177e4 | 1029 | |
fd92833a | 1030 | if (likely(err == 0)) |
f88c91dd | 1031 | inet6addr_notifier_call_chain(NETDEV_UP, ifa); |
1da177e4 LT |
1032 | else { |
1033 | kfree(ifa); | |
1034 | ifa = ERR_PTR(err); | |
1035 | } | |
1036 | ||
1037 | return ifa; | |
1038 | out: | |
5c578aed | 1039 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
1040 | goto out2; |
1041 | } | |
1042 | ||
5b84efec TH |
1043 | enum cleanup_prefix_rt_t { |
1044 | CLEANUP_PREFIX_RT_NOP, /* no cleanup action for prefix route */ | |
1045 | CLEANUP_PREFIX_RT_DEL, /* delete the prefix route */ | |
1046 | CLEANUP_PREFIX_RT_EXPIRE, /* update the lifetime of the prefix route */ | |
1047 | }; | |
1048 | ||
1049 | /* | |
1050 | * Check, whether the prefix for ifp would still need a prefix route | |
1051 | * after deleting ifp. The function returns one of the CLEANUP_PREFIX_RT_* | |
1052 | * constants. | |
1053 | * | |
1054 | * 1) we don't purge prefix if address was not permanent. | |
1055 | * prefix is managed by its own lifetime. | |
1056 | * 2) we also don't purge, if the address was IFA_F_NOPREFIXROUTE. | |
1057 | * 3) if there are no addresses, delete prefix. | |
1058 | * 4) if there are still other permanent address(es), | |
1059 | * corresponding prefix is still permanent. | |
1060 | * 5) if there are still other addresses with IFA_F_NOPREFIXROUTE, | |
1061 | * don't purge the prefix, assume user space is managing it. | |
1062 | * 6) otherwise, update prefix lifetime to the | |
1063 | * longest valid lifetime among the corresponding | |
1064 | * addresses on the device. | |
1065 | * Note: subsequent RA will update lifetime. | |
1066 | **/ | |
1067 | static enum cleanup_prefix_rt_t | |
1068 | check_cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long *expires) | |
1069 | { | |
1070 | struct inet6_ifaddr *ifa; | |
1071 | struct inet6_dev *idev = ifp->idev; | |
1072 | unsigned long lifetime; | |
1073 | enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_DEL; | |
1074 | ||
1075 | *expires = jiffies; | |
1076 | ||
1077 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
1078 | if (ifa == ifp) | |
1079 | continue; | |
1080 | if (!ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
1081 | ifp->prefix_len)) | |
1082 | continue; | |
1083 | if (ifa->flags & (IFA_F_PERMANENT | IFA_F_NOPREFIXROUTE)) | |
1084 | return CLEANUP_PREFIX_RT_NOP; | |
1085 | ||
1086 | action = CLEANUP_PREFIX_RT_EXPIRE; | |
1087 | ||
1088 | spin_lock(&ifa->lock); | |
1089 | ||
1090 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); | |
1091 | /* | |
1092 | * Note: Because this address is | |
1093 | * not permanent, lifetime < | |
1094 | * LONG_MAX / HZ here. | |
1095 | */ | |
1096 | if (time_before(*expires, ifa->tstamp + lifetime * HZ)) | |
1097 | *expires = ifa->tstamp + lifetime * HZ; | |
1098 | spin_unlock(&ifa->lock); | |
1099 | } | |
1100 | ||
1101 | return action; | |
1102 | } | |
1103 | ||
1104 | static void | |
1105 | cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long expires, bool del_rt) | |
1106 | { | |
1107 | struct rt6_info *rt; | |
1108 | ||
1109 | rt = addrconf_get_prefix_route(&ifp->addr, | |
1110 | ifp->prefix_len, | |
1111 | ifp->idev->dev, | |
1112 | 0, RTF_GATEWAY | RTF_DEFAULT); | |
1113 | if (rt) { | |
1114 | if (del_rt) | |
1115 | ip6_del_rt(rt); | |
1116 | else { | |
1117 | if (!(rt->rt6i_flags & RTF_EXPIRES)) | |
1118 | rt6_set_expires(rt, expires); | |
1119 | ip6_rt_put(rt); | |
1120 | } | |
1121 | } | |
1122 | } | |
1123 | ||
1124 | ||
1da177e4 LT |
1125 | /* This function wants to get referenced ifp and releases it before return */ |
1126 | ||
1127 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
1128 | { | |
4c5ff6a6 | 1129 | int state; |
5b84efec TH |
1130 | enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_NOP; |
1131 | unsigned long expires; | |
1da177e4 | 1132 | |
c15b1cca HFS |
1133 | ASSERT_RTNL(); |
1134 | ||
8e8e676d | 1135 | spin_lock_bh(&ifp->lock); |
4c5ff6a6 | 1136 | state = ifp->state; |
e9d3e084 | 1137 | ifp->state = INET6_IFADDR_STATE_DEAD; |
8e8e676d | 1138 | spin_unlock_bh(&ifp->lock); |
4c5ff6a6 HX |
1139 | |
1140 | if (state == INET6_IFADDR_STATE_DEAD) | |
1141 | goto out; | |
1da177e4 | 1142 | |
5c578aed | 1143 | spin_lock_bh(&addrconf_hash_lock); |
1144 | hlist_del_init_rcu(&ifp->addr_lst); | |
5c578aed | 1145 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 | 1146 | |
5b84efec | 1147 | write_lock_bh(&ifp->idev->lock); |
5d9efa7e | 1148 | |
1da177e4 | 1149 | if (ifp->flags&IFA_F_TEMPORARY) { |
372e6c8f | 1150 | list_del(&ifp->tmp_list); |
1151 | if (ifp->ifpub) { | |
1152 | in6_ifa_put(ifp->ifpub); | |
1153 | ifp->ifpub = NULL; | |
1da177e4 | 1154 | } |
372e6c8f | 1155 | __in6_ifa_put(ifp); |
1da177e4 | 1156 | } |
1da177e4 | 1157 | |
5b84efec TH |
1158 | if (ifp->flags & IFA_F_PERMANENT && !(ifp->flags & IFA_F_NOPREFIXROUTE)) |
1159 | action = check_cleanup_prefix_route(ifp, &expires); | |
502a2ffd | 1160 | |
5b84efec TH |
1161 | list_del_init(&ifp->if_list); |
1162 | __in6_ifa_put(ifp); | |
1163 | ||
1164 | write_unlock_bh(&ifp->idev->lock); | |
1da177e4 | 1165 | |
c15b1cca | 1166 | addrconf_del_dad_work(ifp); |
b2238566 | 1167 | |
1da177e4 LT |
1168 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
1169 | ||
f88c91dd | 1170 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifp); |
1da177e4 | 1171 | |
5b84efec TH |
1172 | if (action != CLEANUP_PREFIX_RT_NOP) { |
1173 | cleanup_prefix_route(ifp, expires, | |
1174 | action == CLEANUP_PREFIX_RT_DEL); | |
1da177e4 LT |
1175 | } |
1176 | ||
c3968a85 DW |
1177 | /* clean up prefsrc entries */ |
1178 | rt6_remove_prefsrc(ifp); | |
4c5ff6a6 | 1179 | out: |
1da177e4 LT |
1180 | in6_ifa_put(ifp); |
1181 | } | |
1182 | ||
1da177e4 LT |
1183 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) |
1184 | { | |
1185 | struct inet6_dev *idev = ifp->idev; | |
1186 | struct in6_addr addr, *tmpaddr; | |
76f793e3 | 1187 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age; |
eac55bf9 | 1188 | unsigned long regen_advance; |
1da177e4 LT |
1189 | int tmp_plen; |
1190 | int ret = 0; | |
95c385b4 | 1191 | u32 addr_flags; |
76f793e3 | 1192 | unsigned long now = jiffies; |
1da177e4 | 1193 | |
53bd6749 | 1194 | write_lock_bh(&idev->lock); |
1da177e4 LT |
1195 | if (ift) { |
1196 | spin_lock_bh(&ift->lock); | |
1197 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
1198 | spin_unlock_bh(&ift->lock); | |
1199 | tmpaddr = &addr; | |
1200 | } else { | |
1201 | tmpaddr = NULL; | |
1202 | } | |
1203 | retry: | |
1204 | in6_dev_hold(idev); | |
1205 | if (idev->cnf.use_tempaddr <= 0) { | |
53bd6749 | 1206 | write_unlock_bh(&idev->lock); |
f3213831 | 1207 | pr_info("%s: use_tempaddr is disabled\n", __func__); |
1da177e4 LT |
1208 | in6_dev_put(idev); |
1209 | ret = -1; | |
1210 | goto out; | |
1211 | } | |
1212 | spin_lock_bh(&ifp->lock); | |
1213 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
1214 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
1215 | spin_unlock_bh(&ifp->lock); | |
53bd6749 | 1216 | write_unlock_bh(&idev->lock); |
f3213831 JP |
1217 | pr_warn("%s: regeneration time exceeded - disabled temporary address support\n", |
1218 | __func__); | |
1da177e4 LT |
1219 | in6_dev_put(idev); |
1220 | ret = -1; | |
1221 | goto out; | |
1222 | } | |
1223 | in6_ifa_hold(ifp); | |
1224 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
eb7e0575 | 1225 | __ipv6_try_regen_rndid(idev, tmpaddr); |
1da177e4 | 1226 | memcpy(&addr.s6_addr[8], idev->rndid, 8); |
76f793e3 | 1227 | age = (now - ifp->tstamp) / HZ; |
1da177e4 LT |
1228 | tmp_valid_lft = min_t(__u32, |
1229 | ifp->valid_lft, | |
7a876b0e | 1230 | idev->cnf.temp_valid_lft + age); |
1ab1457c YH |
1231 | tmp_prefered_lft = min_t(__u32, |
1232 | ifp->prefered_lft, | |
7a876b0e | 1233 | idev->cnf.temp_prefered_lft + age - |
784e2710 | 1234 | idev->cnf.max_desync_factor); |
1da177e4 | 1235 | tmp_plen = ifp->prefix_len; |
1da177e4 LT |
1236 | tmp_tstamp = ifp->tstamp; |
1237 | spin_unlock_bh(&ifp->lock); | |
1238 | ||
eac55bf9 | 1239 | regen_advance = idev->cnf.regen_max_retry * |
67ba4152 IM |
1240 | idev->cnf.dad_transmits * |
1241 | NEIGH_VAR(idev->nd_parms, RETRANS_TIME) / HZ; | |
53bd6749 | 1242 | write_unlock_bh(&idev->lock); |
95c385b4 | 1243 | |
eac55bf9 BB |
1244 | /* A temporary address is created only if this calculated Preferred |
1245 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, | |
1246 | * an implementation must not create a temporary address with a zero | |
1247 | * Preferred Lifetime. | |
ecab6701 HK |
1248 | * Use age calculation as in addrconf_verify to avoid unnecessary |
1249 | * temporary addresses being generated. | |
eac55bf9 | 1250 | */ |
ecab6701 HK |
1251 | age = (now - tmp_tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; |
1252 | if (tmp_prefered_lft <= regen_advance + age) { | |
eac55bf9 BB |
1253 | in6_ifa_put(ifp); |
1254 | in6_dev_put(idev); | |
1255 | ret = -1; | |
1256 | goto out; | |
1257 | } | |
1258 | ||
95c385b4 NH |
1259 | addr_flags = IFA_F_TEMPORARY; |
1260 | /* set in addrconf_prefix_rcv() */ | |
1261 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
1262 | addr_flags |= IFA_F_OPTIMISTIC; | |
1263 | ||
4b08a8f1 HFS |
1264 | ift = ipv6_add_addr(idev, &addr, NULL, tmp_plen, |
1265 | ipv6_addr_scope(&addr), addr_flags, | |
1266 | tmp_valid_lft, tmp_prefered_lft); | |
1267 | if (IS_ERR(ift)) { | |
1da177e4 LT |
1268 | in6_ifa_put(ifp); |
1269 | in6_dev_put(idev); | |
f3213831 | 1270 | pr_info("%s: retry temporary address regeneration\n", __func__); |
1da177e4 | 1271 | tmpaddr = &addr; |
53bd6749 | 1272 | write_lock_bh(&idev->lock); |
1da177e4 LT |
1273 | goto retry; |
1274 | } | |
1275 | ||
1276 | spin_lock_bh(&ift->lock); | |
1277 | ift->ifpub = ifp; | |
76f793e3 | 1278 | ift->cstamp = now; |
1da177e4 LT |
1279 | ift->tstamp = tmp_tstamp; |
1280 | spin_unlock_bh(&ift->lock); | |
1281 | ||
cf22f9a2 | 1282 | addrconf_dad_start(ift); |
1da177e4 LT |
1283 | in6_ifa_put(ift); |
1284 | in6_dev_put(idev); | |
1285 | out: | |
1286 | return ret; | |
1287 | } | |
1da177e4 LT |
1288 | |
1289 | /* | |
072047e4 | 1290 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 1291 | */ |
a9b05723 YH |
1292 | enum { |
1293 | IPV6_SADDR_RULE_INIT = 0, | |
1294 | IPV6_SADDR_RULE_LOCAL, | |
1295 | IPV6_SADDR_RULE_SCOPE, | |
1296 | IPV6_SADDR_RULE_PREFERRED, | |
1297 | #ifdef CONFIG_IPV6_MIP6 | |
1298 | IPV6_SADDR_RULE_HOA, | |
1299 | #endif | |
1300 | IPV6_SADDR_RULE_OIF, | |
1301 | IPV6_SADDR_RULE_LABEL, | |
a9b05723 | 1302 | IPV6_SADDR_RULE_PRIVACY, |
a9b05723 YH |
1303 | IPV6_SADDR_RULE_ORCHID, |
1304 | IPV6_SADDR_RULE_PREFIX, | |
7fd2561e EK |
1305 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
1306 | IPV6_SADDR_RULE_NOT_OPTIMISTIC, | |
1307 | #endif | |
a9b05723 YH |
1308 | IPV6_SADDR_RULE_MAX |
1309 | }; | |
1310 | ||
072047e4 | 1311 | struct ipv6_saddr_score { |
a9b05723 YH |
1312 | int rule; |
1313 | int addr_type; | |
1314 | struct inet6_ifaddr *ifa; | |
1315 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); | |
1316 | int scopedist; | |
1317 | int matchlen; | |
072047e4 YH |
1318 | }; |
1319 | ||
a9b05723 | 1320 | struct ipv6_saddr_dst { |
9acd9f3a | 1321 | const struct in6_addr *addr; |
a9b05723 YH |
1322 | int ifindex; |
1323 | int scope; | |
1324 | int label; | |
7cbca67c | 1325 | unsigned int prefs; |
a9b05723 | 1326 | }; |
072047e4 | 1327 | |
b6f99a21 | 1328 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 1329 | { |
45bb0060 | 1330 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK)) |
072047e4 YH |
1331 | return 1; |
1332 | return 0; | |
1da177e4 LT |
1333 | } |
1334 | ||
7fd2561e EK |
1335 | static inline bool ipv6_use_optimistic_addr(struct inet6_dev *idev) |
1336 | { | |
1337 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
1338 | return idev && idev->cnf.optimistic_dad && idev->cnf.use_optimistic; | |
1339 | #else | |
1340 | return false; | |
1341 | #endif | |
1342 | } | |
1343 | ||
3de23255 BT |
1344 | static int ipv6_get_saddr_eval(struct net *net, |
1345 | struct ipv6_saddr_score *score, | |
a9b05723 YH |
1346 | struct ipv6_saddr_dst *dst, |
1347 | int i) | |
1348 | { | |
1349 | int ret; | |
1350 | ||
1351 | if (i <= score->rule) { | |
1352 | switch (i) { | |
1353 | case IPV6_SADDR_RULE_SCOPE: | |
1354 | ret = score->scopedist; | |
1355 | break; | |
1356 | case IPV6_SADDR_RULE_PREFIX: | |
1357 | ret = score->matchlen; | |
1358 | break; | |
1359 | default: | |
1360 | ret = !!test_bit(i, score->scorebits); | |
1361 | } | |
1362 | goto out; | |
1363 | } | |
1364 | ||
1365 | switch (i) { | |
1366 | case IPV6_SADDR_RULE_INIT: | |
1367 | /* Rule 0: remember if hiscore is not ready yet */ | |
1368 | ret = !!score->ifa; | |
1369 | break; | |
1370 | case IPV6_SADDR_RULE_LOCAL: | |
1371 | /* Rule 1: Prefer same address */ | |
1372 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); | |
1373 | break; | |
1374 | case IPV6_SADDR_RULE_SCOPE: | |
1375 | /* Rule 2: Prefer appropriate scope | |
1376 | * | |
1377 | * ret | |
1378 | * ^ | |
1379 | * -1 | d 15 | |
1380 | * ---+--+-+---> scope | |
1381 | * | | |
1382 | * | d is scope of the destination. | |
1383 | * B-d | \ | |
1384 | * | \ <- smaller scope is better if | |
db9c7c39 | 1385 | * B-15 | \ if scope is enough for destination. |
a9b05723 YH |
1386 | * | ret = B - scope (-1 <= scope >= d <= 15). |
1387 | * d-C-1 | / | |
1388 | * |/ <- greater is better | |
1389 | * -C / if scope is not enough for destination. | |
1390 | * /| ret = scope - C (-1 <= d < scope <= 15). | |
1391 | * | |
1392 | * d - C - 1 < B -15 (for all -1 <= d <= 15). | |
1393 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. | |
1394 | * Assume B = 0 and we get C > 29. | |
1395 | */ | |
1396 | ret = __ipv6_addr_src_scope(score->addr_type); | |
1397 | if (ret >= dst->scope) | |
1398 | ret = -ret; | |
1399 | else | |
1400 | ret -= 128; /* 30 is enough */ | |
1401 | score->scopedist = ret; | |
1402 | break; | |
1403 | case IPV6_SADDR_RULE_PREFERRED: | |
7fd2561e | 1404 | { |
a9b05723 | 1405 | /* Rule 3: Avoid deprecated and optimistic addresses */ |
7fd2561e EK |
1406 | u8 avoid = IFA_F_DEPRECATED; |
1407 | ||
1408 | if (!ipv6_use_optimistic_addr(score->ifa->idev)) | |
1409 | avoid |= IFA_F_OPTIMISTIC; | |
a9b05723 | 1410 | ret = ipv6_saddr_preferred(score->addr_type) || |
7fd2561e | 1411 | !(score->ifa->flags & avoid); |
a9b05723 | 1412 | break; |
7fd2561e | 1413 | } |
a9b05723 YH |
1414 | #ifdef CONFIG_IPV6_MIP6 |
1415 | case IPV6_SADDR_RULE_HOA: | |
7cbca67c | 1416 | { |
a9b05723 | 1417 | /* Rule 4: Prefer home address */ |
7cbca67c YH |
1418 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
1419 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; | |
a9b05723 | 1420 | break; |
7cbca67c | 1421 | } |
a9b05723 YH |
1422 | #endif |
1423 | case IPV6_SADDR_RULE_OIF: | |
1424 | /* Rule 5: Prefer outgoing interface */ | |
1425 | ret = (!dst->ifindex || | |
1426 | dst->ifindex == score->ifa->idev->dev->ifindex); | |
1427 | break; | |
1428 | case IPV6_SADDR_RULE_LABEL: | |
1429 | /* Rule 6: Prefer matching label */ | |
3de23255 BT |
1430 | ret = ipv6_addr_label(net, |
1431 | &score->ifa->addr, score->addr_type, | |
a9b05723 YH |
1432 | score->ifa->idev->dev->ifindex) == dst->label; |
1433 | break; | |
a9b05723 | 1434 | case IPV6_SADDR_RULE_PRIVACY: |
7cbca67c | 1435 | { |
a9b05723 | 1436 | /* Rule 7: Prefer public address |
25985edc | 1437 | * Note: prefer temporary address if use_tempaddr >= 2 |
a9b05723 | 1438 | */ |
7cbca67c YH |
1439 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
1440 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : | |
1441 | score->ifa->idev->cnf.use_tempaddr >= 2; | |
1442 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; | |
a9b05723 | 1443 | break; |
7cbca67c | 1444 | } |
a9b05723 YH |
1445 | case IPV6_SADDR_RULE_ORCHID: |
1446 | /* Rule 8-: Prefer ORCHID vs ORCHID or | |
1447 | * non-ORCHID vs non-ORCHID | |
1448 | */ | |
1449 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ | |
1450 | ipv6_addr_orchid(dst->addr)); | |
1451 | break; | |
1452 | case IPV6_SADDR_RULE_PREFIX: | |
1453 | /* Rule 8: Use longest matching prefix */ | |
91b4b04f YH |
1454 | ret = ipv6_addr_diff(&score->ifa->addr, dst->addr); |
1455 | if (ret > score->ifa->prefix_len) | |
1456 | ret = score->ifa->prefix_len; | |
1457 | score->matchlen = ret; | |
a9b05723 | 1458 | break; |
7fd2561e EK |
1459 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
1460 | case IPV6_SADDR_RULE_NOT_OPTIMISTIC: | |
1461 | /* Optimistic addresses still have lower precedence than other | |
1462 | * preferred addresses. | |
1463 | */ | |
1464 | ret = !(score->ifa->flags & IFA_F_OPTIMISTIC); | |
1465 | break; | |
1466 | #endif | |
a9b05723 YH |
1467 | default: |
1468 | ret = 0; | |
1469 | } | |
1470 | ||
1471 | if (ret) | |
1472 | __set_bit(i, score->scorebits); | |
1473 | score->rule = i; | |
1474 | out: | |
1475 | return ret; | |
1476 | } | |
1477 | ||
c0b8da1e YH |
1478 | static int __ipv6_dev_get_saddr(struct net *net, |
1479 | struct ipv6_saddr_dst *dst, | |
c0b8da1e YH |
1480 | struct inet6_dev *idev, |
1481 | struct ipv6_saddr_score *scores, | |
1482 | int hiscore_idx) | |
9131f3de | 1483 | { |
c0b8da1e | 1484 | struct ipv6_saddr_score *score = &scores[1 - hiscore_idx], *hiscore = &scores[hiscore_idx]; |
9131f3de YH |
1485 | |
1486 | read_lock_bh(&idev->lock); | |
1487 | list_for_each_entry(score->ifa, &idev->addr_list, if_list) { | |
1488 | int i; | |
1489 | ||
1490 | /* | |
1491 | * - Tentative Address (RFC2462 section 5.4) | |
1492 | * - A tentative address is not considered | |
1493 | * "assigned to an interface" in the traditional | |
1494 | * sense, unless it is also flagged as optimistic. | |
1495 | * - Candidate Source Address (section 4) | |
1496 | * - In any case, anycast addresses, multicast | |
1497 | * addresses, and the unspecified address MUST | |
1498 | * NOT be included in a candidate set. | |
1499 | */ | |
1500 | if ((score->ifa->flags & IFA_F_TENTATIVE) && | |
1501 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) | |
1502 | continue; | |
1503 | ||
1504 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); | |
1505 | ||
1506 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || | |
1507 | score->addr_type & IPV6_ADDR_MULTICAST)) { | |
1508 | net_dbg_ratelimited("ADDRCONF: unspecified / multicast address assigned as unicast address on %s", | |
1509 | idev->dev->name); | |
1510 | continue; | |
1511 | } | |
1512 | ||
1513 | score->rule = -1; | |
1514 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); | |
1515 | ||
1516 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { | |
1517 | int minihiscore, miniscore; | |
1518 | ||
1519 | minihiscore = ipv6_get_saddr_eval(net, hiscore, dst, i); | |
1520 | miniscore = ipv6_get_saddr_eval(net, score, dst, i); | |
1521 | ||
1522 | if (minihiscore > miniscore) { | |
1523 | if (i == IPV6_SADDR_RULE_SCOPE && | |
1524 | score->scopedist > 0) { | |
1525 | /* | |
1526 | * special case: | |
1527 | * each remaining entry | |
1528 | * has too small (not enough) | |
1529 | * scope, because ifa entries | |
1530 | * are sorted by their scope | |
1531 | * values. | |
1532 | */ | |
1533 | goto out; | |
1534 | } | |
1535 | break; | |
1536 | } else if (minihiscore < miniscore) { | |
1537 | if (hiscore->ifa) | |
1538 | in6_ifa_put(hiscore->ifa); | |
1539 | ||
1540 | in6_ifa_hold(score->ifa); | |
1541 | ||
1542 | swap(hiscore, score); | |
c0b8da1e | 1543 | hiscore_idx = 1 - hiscore_idx; |
9131f3de YH |
1544 | |
1545 | /* restore our iterator */ | |
1546 | score->ifa = hiscore->ifa; | |
1547 | ||
1548 | break; | |
1549 | } | |
1550 | } | |
1551 | } | |
1552 | out: | |
1553 | read_unlock_bh(&idev->lock); | |
c0b8da1e | 1554 | return hiscore_idx; |
9131f3de YH |
1555 | } |
1556 | ||
afbac601 DA |
1557 | static int ipv6_get_saddr_master(struct net *net, |
1558 | const struct net_device *dst_dev, | |
1559 | const struct net_device *master, | |
1560 | struct ipv6_saddr_dst *dst, | |
1561 | struct ipv6_saddr_score *scores, | |
1562 | int hiscore_idx) | |
1563 | { | |
1564 | struct inet6_dev *idev; | |
1565 | ||
1566 | idev = __in6_dev_get(dst_dev); | |
1567 | if (idev) | |
1568 | hiscore_idx = __ipv6_dev_get_saddr(net, dst, idev, | |
1569 | scores, hiscore_idx); | |
1570 | ||
1571 | idev = __in6_dev_get(master); | |
1572 | if (idev) | |
1573 | hiscore_idx = __ipv6_dev_get_saddr(net, dst, idev, | |
1574 | scores, hiscore_idx); | |
1575 | ||
1576 | return hiscore_idx; | |
1577 | } | |
1578 | ||
b3f644fc | 1579 | int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev, |
9acd9f3a | 1580 | const struct in6_addr *daddr, unsigned int prefs, |
7cbca67c | 1581 | struct in6_addr *saddr) |
1da177e4 | 1582 | { |
c0b8da1e | 1583 | struct ipv6_saddr_score scores[2], *hiscore; |
a9b05723 | 1584 | struct ipv6_saddr_dst dst; |
9131f3de | 1585 | struct inet6_dev *idev; |
072047e4 | 1586 | struct net_device *dev; |
a9b05723 | 1587 | int dst_type; |
9131f3de | 1588 | bool use_oif_addr = false; |
c0b8da1e | 1589 | int hiscore_idx = 0; |
1da177e4 | 1590 | |
a9b05723 YH |
1591 | dst_type = __ipv6_addr_type(daddr); |
1592 | dst.addr = daddr; | |
1593 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; | |
1594 | dst.scope = __ipv6_addr_src_scope(dst_type); | |
3de23255 | 1595 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
7cbca67c | 1596 | dst.prefs = prefs; |
a9b05723 | 1597 | |
c0b8da1e YH |
1598 | scores[hiscore_idx].rule = -1; |
1599 | scores[hiscore_idx].ifa = NULL; | |
1da177e4 | 1600 | |
8814c4b5 | 1601 | rcu_read_lock(); |
1da177e4 | 1602 | |
9131f3de YH |
1603 | /* Candidate Source Address (section 4) |
1604 | * - multicast and link-local destination address, | |
1605 | * the set of candidate source address MUST only | |
1606 | * include addresses assigned to interfaces | |
1607 | * belonging to the same link as the outgoing | |
1608 | * interface. | |
1609 | * (- For site-local destination addresses, the | |
1610 | * set of candidate source addresses MUST only | |
1611 | * include addresses assigned to interfaces | |
1612 | * belonging to the same site as the outgoing | |
1613 | * interface.) | |
3985e8a3 EK |
1614 | * - "It is RECOMMENDED that the candidate source addresses |
1615 | * be the set of unicast addresses assigned to the | |
1616 | * interface that will be used to send to the destination | |
1617 | * (the 'outgoing' interface)." (RFC 6724) | |
9131f3de YH |
1618 | */ |
1619 | if (dst_dev) { | |
3985e8a3 | 1620 | idev = __in6_dev_get(dst_dev); |
9131f3de | 1621 | if ((dst_type & IPV6_ADDR_MULTICAST) || |
3985e8a3 EK |
1622 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL || |
1623 | (idev && idev->cnf.use_oif_addrs_only)) { | |
9131f3de YH |
1624 | use_oif_addr = true; |
1625 | } | |
1626 | } | |
a9b05723 | 1627 | |
9131f3de | 1628 | if (use_oif_addr) { |
c0b8da1e | 1629 | if (idev) |
c15df306 | 1630 | hiscore_idx = __ipv6_dev_get_saddr(net, &dst, idev, scores, hiscore_idx); |
9131f3de | 1631 | } else { |
afbac601 DA |
1632 | const struct net_device *master; |
1633 | int master_idx = 0; | |
1634 | ||
1635 | /* if dst_dev exists and is enslaved to an L3 device, then | |
1636 | * prefer addresses from dst_dev and then the master over | |
1637 | * any other enslaved devices in the L3 domain. | |
1638 | */ | |
1639 | master = l3mdev_master_dev_rcu(dst_dev); | |
1640 | if (master) { | |
1641 | master_idx = master->ifindex; | |
1642 | ||
1643 | hiscore_idx = ipv6_get_saddr_master(net, dst_dev, | |
1644 | master, &dst, | |
1645 | scores, hiscore_idx); | |
1646 | ||
1647 | if (scores[hiscore_idx].ifa) | |
1648 | goto out; | |
1649 | } | |
1650 | ||
9131f3de | 1651 | for_each_netdev_rcu(net, dev) { |
afbac601 DA |
1652 | /* only consider addresses on devices in the |
1653 | * same L3 domain | |
1654 | */ | |
1655 | if (l3mdev_master_ifindex_rcu(dev) != master_idx) | |
1656 | continue; | |
9131f3de YH |
1657 | idev = __in6_dev_get(dev); |
1658 | if (!idev) | |
072047e4 | 1659 | continue; |
c15df306 | 1660 | hiscore_idx = __ipv6_dev_get_saddr(net, &dst, idev, scores, hiscore_idx); |
1da177e4 LT |
1661 | } |
1662 | } | |
afbac601 DA |
1663 | |
1664 | out: | |
8814c4b5 | 1665 | rcu_read_unlock(); |
1da177e4 | 1666 | |
c0b8da1e | 1667 | hiscore = &scores[hiscore_idx]; |
a9b05723 | 1668 | if (!hiscore->ifa) |
072047e4 | 1669 | return -EADDRNOTAVAIL; |
1ab1457c | 1670 | |
4e3fd7a0 | 1671 | *saddr = hiscore->ifa->addr; |
a9b05723 | 1672 | in6_ifa_put(hiscore->ifa); |
072047e4 | 1673 | return 0; |
1da177e4 | 1674 | } |
5e5f3f0f | 1675 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
1da177e4 | 1676 | |
8965779d | 1677 | int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, |
479840ff | 1678 | u32 banned_flags) |
b7b1bfce HFS |
1679 | { |
1680 | struct inet6_ifaddr *ifp; | |
1681 | int err = -EADDRNOTAVAIL; | |
1682 | ||
602582ca HFS |
1683 | list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) { |
1684 | if (ifp->scope > IFA_LINK) | |
1685 | break; | |
b7b1bfce HFS |
1686 | if (ifp->scope == IFA_LINK && |
1687 | !(ifp->flags & banned_flags)) { | |
1688 | *addr = ifp->addr; | |
1689 | err = 0; | |
1690 | break; | |
1691 | } | |
1692 | } | |
1693 | return err; | |
1694 | } | |
1695 | ||
95c385b4 | 1696 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
479840ff | 1697 | u32 banned_flags) |
1da177e4 LT |
1698 | { |
1699 | struct inet6_dev *idev; | |
1700 | int err = -EADDRNOTAVAIL; | |
1701 | ||
8814c4b5 | 1702 | rcu_read_lock(); |
e21e8467 SH |
1703 | idev = __in6_dev_get(dev); |
1704 | if (idev) { | |
1da177e4 | 1705 | read_lock_bh(&idev->lock); |
b7b1bfce | 1706 | err = __ipv6_get_lladdr(idev, addr, banned_flags); |
1da177e4 LT |
1707 | read_unlock_bh(&idev->lock); |
1708 | } | |
8814c4b5 | 1709 | rcu_read_unlock(); |
1da177e4 LT |
1710 | return err; |
1711 | } | |
1712 | ||
1713 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1714 | { | |
1715 | int cnt = 0; | |
1716 | struct inet6_ifaddr *ifp; | |
1717 | ||
1718 | read_lock_bh(&idev->lock); | |
502a2ffd | 1719 | list_for_each_entry(ifp, &idev->addr_list, if_list) |
1da177e4 LT |
1720 | cnt++; |
1721 | read_unlock_bh(&idev->lock); | |
1722 | return cnt; | |
1723 | } | |
1724 | ||
b71d1d42 | 1725 | int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
2a7851bf | 1726 | const struct net_device *dev, int strict) |
c58da4c6 EK |
1727 | { |
1728 | return ipv6_chk_addr_and_flags(net, addr, dev, strict, IFA_F_TENTATIVE); | |
1729 | } | |
1730 | EXPORT_SYMBOL(ipv6_chk_addr); | |
1731 | ||
1732 | int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr, | |
1733 | const struct net_device *dev, int strict, | |
1734 | u32 banned_flags) | |
1da177e4 | 1735 | { |
eedf042a | 1736 | struct inet6_ifaddr *ifp; |
ddbe5032 | 1737 | unsigned int hash = inet6_addr_hash(addr); |
c58da4c6 | 1738 | u32 ifp_flags; |
1da177e4 | 1739 | |
5c578aed | 1740 | rcu_read_lock_bh(); |
b67bfe0d | 1741 | hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1742 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
bfeade08 | 1743 | continue; |
c58da4c6 EK |
1744 | /* Decouple optimistic from tentative for evaluation here. |
1745 | * Ban optimistic addresses explicitly, when required. | |
1746 | */ | |
1747 | ifp_flags = (ifp->flags&IFA_F_OPTIMISTIC) | |
1748 | ? (ifp->flags&~IFA_F_TENTATIVE) | |
1749 | : ifp->flags; | |
1da177e4 | 1750 | if (ipv6_addr_equal(&ifp->addr, addr) && |
c58da4c6 | 1751 | !(ifp_flags&banned_flags) && |
63159f29 | 1752 | (!dev || ifp->idev->dev == dev || |
eedf042a SH |
1753 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) { |
1754 | rcu_read_unlock_bh(); | |
1755 | return 1; | |
1da177e4 LT |
1756 | } |
1757 | } | |
5c578aed | 1758 | |
eedf042a SH |
1759 | rcu_read_unlock_bh(); |
1760 | return 0; | |
1da177e4 | 1761 | } |
c58da4c6 | 1762 | EXPORT_SYMBOL(ipv6_chk_addr_and_flags); |
7159039a | 1763 | |
3e81c6da DM |
1764 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
1765 | struct net_device *dev) | |
1da177e4 | 1766 | { |
ddbe5032 | 1767 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 1768 | struct inet6_ifaddr *ifp; |
1da177e4 | 1769 | |
b67bfe0d | 1770 | hlist_for_each_entry(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1771 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
06bfe655 | 1772 | continue; |
1da177e4 | 1773 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
63159f29 | 1774 | if (!dev || ifp->idev->dev == dev) |
3e81c6da | 1775 | return true; |
1da177e4 LT |
1776 | } |
1777 | } | |
3e81c6da | 1778 | return false; |
1da177e4 LT |
1779 | } |
1780 | ||
7df37ff3 CB |
1781 | /* Compares an address/prefix_len with addresses on device @dev. |
1782 | * If one is found it returns true. | |
1783 | */ | |
1784 | bool ipv6_chk_custom_prefix(const struct in6_addr *addr, | |
1785 | const unsigned int prefix_len, struct net_device *dev) | |
1786 | { | |
1787 | struct inet6_dev *idev; | |
1788 | struct inet6_ifaddr *ifa; | |
1789 | bool ret = false; | |
1790 | ||
1791 | rcu_read_lock(); | |
1792 | idev = __in6_dev_get(dev); | |
1793 | if (idev) { | |
1794 | read_lock_bh(&idev->lock); | |
1795 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
1796 | ret = ipv6_prefix_equal(addr, &ifa->addr, prefix_len); | |
1797 | if (ret) | |
1798 | break; | |
1799 | } | |
1800 | read_unlock_bh(&idev->lock); | |
1801 | } | |
1802 | rcu_read_unlock(); | |
1803 | ||
1804 | return ret; | |
1805 | } | |
1806 | EXPORT_SYMBOL(ipv6_chk_custom_prefix); | |
1807 | ||
b71d1d42 | 1808 | int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev) |
52eeeb84 YH |
1809 | { |
1810 | struct inet6_dev *idev; | |
1811 | struct inet6_ifaddr *ifa; | |
1812 | int onlink; | |
1813 | ||
1814 | onlink = 0; | |
1815 | rcu_read_lock(); | |
1816 | idev = __in6_dev_get(dev); | |
1817 | if (idev) { | |
1818 | read_lock_bh(&idev->lock); | |
502a2ffd | 1819 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
52eeeb84 YH |
1820 | onlink = ipv6_prefix_equal(addr, &ifa->addr, |
1821 | ifa->prefix_len); | |
1822 | if (onlink) | |
1823 | break; | |
1824 | } | |
1825 | read_unlock_bh(&idev->lock); | |
1826 | } | |
1827 | rcu_read_unlock(); | |
1828 | return onlink; | |
1829 | } | |
52eeeb84 YH |
1830 | EXPORT_SYMBOL(ipv6_chk_prefix); |
1831 | ||
9acd9f3a | 1832 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, |
1cab3da6 | 1833 | struct net_device *dev, int strict) |
1da177e4 | 1834 | { |
b79d1d54 | 1835 | struct inet6_ifaddr *ifp, *result = NULL; |
ddbe5032 | 1836 | unsigned int hash = inet6_addr_hash(addr); |
1da177e4 | 1837 | |
5c578aed | 1838 | rcu_read_lock_bh(); |
b67bfe0d | 1839 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1840 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
1cab3da6 | 1841 | continue; |
1da177e4 | 1842 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
63159f29 | 1843 | if (!dev || ifp->idev->dev == dev || |
1da177e4 | 1844 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { |
b79d1d54 | 1845 | result = ifp; |
1da177e4 LT |
1846 | in6_ifa_hold(ifp); |
1847 | break; | |
1848 | } | |
1849 | } | |
1850 | } | |
5c578aed | 1851 | rcu_read_unlock_bh(); |
1da177e4 | 1852 | |
b79d1d54 | 1853 | return result; |
1da177e4 LT |
1854 | } |
1855 | ||
1da177e4 LT |
1856 | /* Gets referenced address, destroys ifaddr */ |
1857 | ||
cc411d0b | 1858 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) |
1da177e4 | 1859 | { |
3d171f39 LR |
1860 | if (dad_failed) |
1861 | ifp->flags |= IFA_F_DADFAILED; | |
1862 | ||
1da177e4 LT |
1863 | if (ifp->flags&IFA_F_PERMANENT) { |
1864 | spin_lock_bh(&ifp->lock); | |
c15b1cca | 1865 | addrconf_del_dad_work(ifp); |
1da177e4 LT |
1866 | ifp->flags |= IFA_F_TENTATIVE; |
1867 | spin_unlock_bh(&ifp->lock); | |
e2577a06 HX |
1868 | if (dad_failed) |
1869 | ipv6_ifa_notify(0, ifp); | |
1da177e4 | 1870 | in6_ifa_put(ifp); |
1da177e4 LT |
1871 | } else if (ifp->flags&IFA_F_TEMPORARY) { |
1872 | struct inet6_ifaddr *ifpub; | |
1873 | spin_lock_bh(&ifp->lock); | |
1874 | ifpub = ifp->ifpub; | |
1875 | if (ifpub) { | |
1876 | in6_ifa_hold(ifpub); | |
1877 | spin_unlock_bh(&ifp->lock); | |
1878 | ipv6_create_tempaddr(ifpub, ifp); | |
1879 | in6_ifa_put(ifpub); | |
1880 | } else { | |
1881 | spin_unlock_bh(&ifp->lock); | |
1882 | } | |
1883 | ipv6_del_addr(ifp); | |
c15b1cca | 1884 | } else { |
1da177e4 | 1885 | ipv6_del_addr(ifp); |
c15b1cca | 1886 | } |
1da177e4 LT |
1887 | } |
1888 | ||
f2344a13 HX |
1889 | static int addrconf_dad_end(struct inet6_ifaddr *ifp) |
1890 | { | |
1891 | int err = -ENOENT; | |
1892 | ||
8e8e676d | 1893 | spin_lock_bh(&ifp->lock); |
f2344a13 HX |
1894 | if (ifp->state == INET6_IFADDR_STATE_DAD) { |
1895 | ifp->state = INET6_IFADDR_STATE_POSTDAD; | |
1896 | err = 0; | |
1897 | } | |
8e8e676d | 1898 | spin_unlock_bh(&ifp->lock); |
f2344a13 HX |
1899 | |
1900 | return err; | |
1901 | } | |
1902 | ||
3c21edbd YH |
1903 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1904 | { | |
1b34be74 | 1905 | struct inet6_dev *idev = ifp->idev; |
1855b7c3 | 1906 | struct net *net = dev_net(ifp->idev->dev); |
9bdd8d40 | 1907 | |
853dc2e0 UB |
1908 | if (addrconf_dad_end(ifp)) { |
1909 | in6_ifa_put(ifp); | |
f2344a13 | 1910 | return; |
853dc2e0 | 1911 | } |
f2344a13 | 1912 | |
e87cc472 JP |
1913 | net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n", |
1914 | ifp->idev->dev->name, &ifp->addr); | |
9bdd8d40 | 1915 | |
5f40ef77 HFS |
1916 | spin_lock_bh(&ifp->lock); |
1917 | ||
1918 | if (ifp->flags & IFA_F_STABLE_PRIVACY) { | |
1919 | int scope = ifp->scope; | |
1920 | u32 flags = ifp->flags; | |
1921 | struct in6_addr new_addr; | |
1922 | struct inet6_ifaddr *ifp2; | |
1923 | u32 valid_lft, preferred_lft; | |
1924 | int pfxlen = ifp->prefix_len; | |
5f40ef77 HFS |
1925 | int retries = ifp->stable_privacy_retry + 1; |
1926 | ||
1855b7c3 | 1927 | if (retries > net->ipv6.sysctl.idgen_retries) { |
5f40ef77 HFS |
1928 | net_info_ratelimited("%s: privacy stable address generation failed because of DAD conflicts!\n", |
1929 | ifp->idev->dev->name); | |
1930 | goto errdad; | |
1931 | } | |
1932 | ||
1933 | new_addr = ifp->addr; | |
1934 | if (ipv6_generate_stable_address(&new_addr, retries, | |
1935 | idev)) | |
1936 | goto errdad; | |
1937 | ||
1938 | valid_lft = ifp->valid_lft; | |
1939 | preferred_lft = ifp->prefered_lft; | |
1940 | ||
1941 | spin_unlock_bh(&ifp->lock); | |
1b34be74 | 1942 | |
5f40ef77 HFS |
1943 | if (idev->cnf.max_addresses && |
1944 | ipv6_count_addresses(idev) >= | |
1945 | idev->cnf.max_addresses) | |
1946 | goto lock_errdad; | |
1947 | ||
1948 | net_info_ratelimited("%s: generating new stable privacy address because of DAD conflict\n", | |
1949 | ifp->idev->dev->name); | |
1950 | ||
1951 | ifp2 = ipv6_add_addr(idev, &new_addr, NULL, pfxlen, | |
1952 | scope, flags, valid_lft, | |
1953 | preferred_lft); | |
1954 | if (IS_ERR(ifp2)) | |
1955 | goto lock_errdad; | |
1956 | ||
1957 | spin_lock_bh(&ifp2->lock); | |
1958 | ifp2->stable_privacy_retry = retries; | |
1959 | ifp2->state = INET6_IFADDR_STATE_PREDAD; | |
1960 | spin_unlock_bh(&ifp2->lock); | |
1961 | ||
1855b7c3 | 1962 | addrconf_mod_dad_work(ifp2, net->ipv6.sysctl.idgen_delay); |
5f40ef77 HFS |
1963 | in6_ifa_put(ifp2); |
1964 | lock_errdad: | |
1965 | spin_lock_bh(&ifp->lock); | |
1b34be74 YH |
1966 | } |
1967 | ||
5f40ef77 | 1968 | errdad: |
c15b1cca HFS |
1969 | /* transition from _POSTDAD to _ERRDAD */ |
1970 | ifp->state = INET6_IFADDR_STATE_ERRDAD; | |
8e8e676d | 1971 | spin_unlock_bh(&ifp->lock); |
c15b1cca HFS |
1972 | |
1973 | addrconf_mod_dad_work(ifp, 0); | |
751eb6b6 | 1974 | in6_ifa_put(ifp); |
3c21edbd | 1975 | } |
1da177e4 | 1976 | |
a9ed4a29 SD |
1977 | /* Join to solicited addr multicast group. |
1978 | * caller must hold RTNL */ | |
b71d1d42 | 1979 | void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 LT |
1980 | { |
1981 | struct in6_addr maddr; | |
1982 | ||
1983 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1984 | return; | |
1985 | ||
1986 | addrconf_addr_solict_mult(addr, &maddr); | |
1987 | ipv6_dev_mc_inc(dev, &maddr); | |
1988 | } | |
1989 | ||
a9ed4a29 | 1990 | /* caller must hold RTNL */ |
b71d1d42 | 1991 | void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
1992 | { |
1993 | struct in6_addr maddr; | |
1994 | ||
1995 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1996 | return; | |
1997 | ||
1998 | addrconf_addr_solict_mult(addr, &maddr); | |
1999 | __ipv6_dev_mc_dec(idev, &maddr); | |
2000 | } | |
2001 | ||
a9ed4a29 | 2002 | /* caller must hold RTNL */ |
20380731 | 2003 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
2004 | { |
2005 | struct in6_addr addr; | |
c15b1cca | 2006 | |
88ad3149 | 2007 | if (ifp->prefix_len >= 127) /* RFC 6164 */ |
2bda8a0c | 2008 | return; |
1da177e4 LT |
2009 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
2010 | if (ipv6_addr_any(&addr)) | |
2011 | return; | |
013b4d90 | 2012 | __ipv6_dev_ac_inc(ifp->idev, &addr); |
1da177e4 LT |
2013 | } |
2014 | ||
a9ed4a29 | 2015 | /* caller must hold RTNL */ |
20380731 | 2016 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
2017 | { |
2018 | struct in6_addr addr; | |
c15b1cca | 2019 | |
88ad3149 | 2020 | if (ifp->prefix_len >= 127) /* RFC 6164 */ |
32019e65 | 2021 | return; |
1da177e4 LT |
2022 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
2023 | if (ipv6_addr_any(&addr)) | |
2024 | return; | |
2025 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
2026 | } | |
2027 | ||
06a4c1c5 | 2028 | static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev) |
2029 | { | |
5241c2d7 | 2030 | if (dev->addr_len != EUI64_ADDR_LEN) |
06a4c1c5 | 2031 | return -1; |
5241c2d7 | 2032 | memcpy(eui, dev->dev_addr, EUI64_ADDR_LEN); |
5e98a36e | 2033 | eui[0] ^= 2; |
06a4c1c5 | 2034 | return 0; |
2035 | } | |
2036 | ||
cb6bf355 YH |
2037 | static int addrconf_ifid_ieee1394(u8 *eui, struct net_device *dev) |
2038 | { | |
2039 | union fwnet_hwaddr *ha; | |
2040 | ||
2041 | if (dev->addr_len != FWNET_ALEN) | |
2042 | return -1; | |
2043 | ||
2044 | ha = (union fwnet_hwaddr *)dev->dev_addr; | |
2045 | ||
2046 | memcpy(eui, &ha->uc.uniq_id, sizeof(ha->uc.uniq_id)); | |
2047 | eui[0] ^= 2; | |
2048 | return 0; | |
2049 | } | |
2050 | ||
073a8e0e YH |
2051 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) |
2052 | { | |
2053 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
2054 | if (dev->addr_len != ARCNET_ALEN) | |
2055 | return -1; | |
2056 | memset(eui, 0, 7); | |
8e5e8f30 | 2057 | eui[7] = *(u8 *)dev->dev_addr; |
073a8e0e YH |
2058 | return 0; |
2059 | } | |
2060 | ||
2061 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
2062 | { | |
2063 | if (dev->addr_len != INFINIBAND_ALEN) | |
2064 | return -1; | |
2065 | memcpy(eui, dev->dev_addr + 12, 8); | |
2066 | eui[0] |= 2; | |
2067 | return 0; | |
2068 | } | |
2069 | ||
c61393ea | 2070 | static int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
dfd982ba | 2071 | { |
9af28511 SH |
2072 | if (addr == 0) |
2073 | return -1; | |
dfd982ba YH |
2074 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || |
2075 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || | |
2076 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || | |
2077 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || | |
2078 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || | |
2079 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; | |
2080 | eui[1] = 0; | |
2081 | eui[2] = 0x5E; | |
2082 | eui[3] = 0xFE; | |
2083 | memcpy(eui + 4, &addr, 4); | |
2084 | return 0; | |
2085 | } | |
dfd982ba YH |
2086 | |
2087 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) | |
2088 | { | |
2089 | if (dev->priv_flags & IFF_ISATAP) | |
2090 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
2091 | return -1; | |
2092 | } | |
2093 | ||
aee80b54 | 2094 | static int addrconf_ifid_gre(u8 *eui, struct net_device *dev) |
2095 | { | |
2096 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
2097 | } | |
2098 | ||
e837735e ND |
2099 | static int addrconf_ifid_ip6tnl(u8 *eui, struct net_device *dev) |
2100 | { | |
2101 | memcpy(eui, dev->perm_addr, 3); | |
2102 | memcpy(eui + 5, dev->perm_addr + 3, 3); | |
2103 | eui[3] = 0xFF; | |
2104 | eui[4] = 0xFE; | |
2105 | eui[0] ^= 2; | |
2106 | return 0; | |
2107 | } | |
2108 | ||
1da177e4 LT |
2109 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
2110 | { | |
2111 | switch (dev->type) { | |
2112 | case ARPHRD_ETHER: | |
2113 | case ARPHRD_FDDI: | |
073a8e0e | 2114 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 2115 | case ARPHRD_ARCNET: |
073a8e0e | 2116 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 2117 | case ARPHRD_INFINIBAND: |
073a8e0e | 2118 | return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0 | 2119 | case ARPHRD_SIT: |
dfd982ba | 2120 | return addrconf_ifid_sit(eui, dev); |
aee80b54 | 2121 | case ARPHRD_IPGRE: |
2122 | return addrconf_ifid_gre(eui, dev); | |
e74bccb8 | 2123 | case ARPHRD_6LOWPAN: |
06a4c1c5 | 2124 | return addrconf_ifid_eui64(eui, dev); |
cb6bf355 YH |
2125 | case ARPHRD_IEEE1394: |
2126 | return addrconf_ifid_ieee1394(eui, dev); | |
e837735e ND |
2127 | case ARPHRD_TUNNEL6: |
2128 | return addrconf_ifid_ip6tnl(eui, dev); | |
1da177e4 LT |
2129 | } |
2130 | return -1; | |
2131 | } | |
2132 | ||
2133 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
2134 | { | |
2135 | int err = -1; | |
2136 | struct inet6_ifaddr *ifp; | |
2137 | ||
2138 | read_lock_bh(&idev->lock); | |
602582ca HFS |
2139 | list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) { |
2140 | if (ifp->scope > IFA_LINK) | |
2141 | break; | |
1da177e4 LT |
2142 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { |
2143 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
2144 | err = 0; | |
2145 | break; | |
2146 | } | |
2147 | } | |
2148 | read_unlock_bh(&idev->lock); | |
2149 | return err; | |
2150 | } | |
2151 | ||
1da177e4 | 2152 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ |
eb7e0575 | 2153 | static void __ipv6_regen_rndid(struct inet6_dev *idev) |
1da177e4 | 2154 | { |
1da177e4 | 2155 | regen: |
955189ef | 2156 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 2157 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
2158 | |
2159 | /* | |
2160 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
2161 | * check if generated address is not inappropriate | |
2162 | * | |
2163 | * - Reserved subnet anycast (RFC 2526) | |
2164 | * 11111101 11....11 1xxxxxxx | |
c7dc89c0 | 2165 | * - ISATAP (RFC4214) 6.1 |
1da177e4 LT |
2166 | * 00-00-5E-FE-xx-xx-xx-xx |
2167 | * - value 0 | |
2168 | * - XXX: already assigned to an address on the device | |
2169 | */ | |
1ab1457c | 2170 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
2171 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
2172 | (idev->rndid[7]&0x80)) | |
2173 | goto regen; | |
2174 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
2175 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
2176 | goto regen; | |
2177 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
2178 | goto regen; | |
2179 | } | |
1da177e4 LT |
2180 | } |
2181 | ||
2182 | static void ipv6_regen_rndid(unsigned long data) | |
2183 | { | |
2184 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
2185 | unsigned long expires; | |
2186 | ||
8814c4b5 | 2187 | rcu_read_lock_bh(); |
1da177e4 LT |
2188 | write_lock_bh(&idev->lock); |
2189 | ||
2190 | if (idev->dead) | |
2191 | goto out; | |
2192 | ||
eb7e0575 | 2193 | __ipv6_regen_rndid(idev); |
1ab1457c | 2194 | |
1da177e4 | 2195 | expires = jiffies + |
1ab1457c | 2196 | idev->cnf.temp_prefered_lft * HZ - |
1f9248e5 JP |
2197 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * |
2198 | NEIGH_VAR(idev->nd_parms, RETRANS_TIME) - | |
784e2710 | 2199 | idev->cnf.max_desync_factor * HZ; |
1da177e4 | 2200 | if (time_before(expires, jiffies)) { |
f3213831 JP |
2201 | pr_warn("%s: too short regeneration interval; timer disabled for %s\n", |
2202 | __func__, idev->dev->name); | |
1da177e4 LT |
2203 | goto out; |
2204 | } | |
2205 | ||
2206 | if (!mod_timer(&idev->regen_timer, expires)) | |
2207 | in6_dev_hold(idev); | |
2208 | ||
2209 | out: | |
2210 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 2211 | rcu_read_unlock_bh(); |
1da177e4 LT |
2212 | in6_dev_put(idev); |
2213 | } | |
2214 | ||
eb7e0575 | 2215 | static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) |
8e5e8f30 | 2216 | { |
1da177e4 | 2217 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) |
eb7e0575 | 2218 | __ipv6_regen_rndid(idev); |
1da177e4 | 2219 | } |
1da177e4 LT |
2220 | |
2221 | /* | |
2222 | * Add prefix route. | |
2223 | */ | |
2224 | ||
2225 | static void | |
2226 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 2227 | unsigned long expires, u32 flags) |
1da177e4 | 2228 | { |
86872cb5 | 2229 | struct fib6_config cfg = { |
ca254490 | 2230 | .fc_table = l3mdev_fib_table(dev) ? : RT6_TABLE_PREFIX, |
86872cb5 TG |
2231 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
2232 | .fc_ifindex = dev->ifindex, | |
2233 | .fc_expires = expires, | |
2234 | .fc_dst_len = plen, | |
2235 | .fc_flags = RTF_UP | flags, | |
c346dca1 | 2236 | .fc_nlinfo.nl_net = dev_net(dev), |
f410a1fb | 2237 | .fc_protocol = RTPROT_KERNEL, |
86872cb5 | 2238 | }; |
1da177e4 | 2239 | |
4e3fd7a0 | 2240 | cfg.fc_dst = *pfx; |
1da177e4 LT |
2241 | |
2242 | /* Prevent useless cloning on PtP SIT. | |
2243 | This thing is done here expecting that the whole | |
2244 | class of non-broadcast devices need not cloning. | |
2245 | */ | |
07a93626 | 2246 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
86872cb5 TG |
2247 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
2248 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 2249 | #endif |
1da177e4 | 2250 | |
86872cb5 | 2251 | ip6_route_add(&cfg); |
1da177e4 LT |
2252 | } |
2253 | ||
14ef37b6 AH |
2254 | |
2255 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, | |
2256 | int plen, | |
2257 | const struct net_device *dev, | |
2258 | u32 flags, u32 noflags) | |
2259 | { | |
2260 | struct fib6_node *fn; | |
2261 | struct rt6_info *rt = NULL; | |
2262 | struct fib6_table *table; | |
ca254490 | 2263 | u32 tb_id = l3mdev_fib_table(dev) ? : RT6_TABLE_PREFIX; |
14ef37b6 | 2264 | |
ca254490 | 2265 | table = fib6_get_table(dev_net(dev), tb_id); |
63159f29 | 2266 | if (!table) |
14ef37b6 AH |
2267 | return NULL; |
2268 | ||
5744dd9b | 2269 | read_lock_bh(&table->tb6_lock); |
14ef37b6 AH |
2270 | fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0); |
2271 | if (!fn) | |
2272 | goto out; | |
1f56a01f MKL |
2273 | |
2274 | noflags |= RTF_CACHE; | |
14ef37b6 | 2275 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { |
d1918542 | 2276 | if (rt->dst.dev->ifindex != dev->ifindex) |
14ef37b6 AH |
2277 | continue; |
2278 | if ((rt->rt6i_flags & flags) != flags) | |
2279 | continue; | |
85da53bf | 2280 | if ((rt->rt6i_flags & noflags) != 0) |
14ef37b6 AH |
2281 | continue; |
2282 | dst_hold(&rt->dst); | |
2283 | break; | |
2284 | } | |
2285 | out: | |
5744dd9b | 2286 | read_unlock_bh(&table->tb6_lock); |
14ef37b6 AH |
2287 | return rt; |
2288 | } | |
2289 | ||
2290 | ||
1da177e4 LT |
2291 | /* Create "default" multicast route to the interface */ |
2292 | ||
2293 | static void addrconf_add_mroute(struct net_device *dev) | |
2294 | { | |
86872cb5 | 2295 | struct fib6_config cfg = { |
ca254490 | 2296 | .fc_table = l3mdev_fib_table(dev) ? : RT6_TABLE_LOCAL, |
86872cb5 TG |
2297 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
2298 | .fc_ifindex = dev->ifindex, | |
2299 | .fc_dst_len = 8, | |
2300 | .fc_flags = RTF_UP, | |
c346dca1 | 2301 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 TG |
2302 | }; |
2303 | ||
2304 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
2305 | ||
2306 | ip6_route_add(&cfg); | |
1da177e4 LT |
2307 | } |
2308 | ||
1da177e4 LT |
2309 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) |
2310 | { | |
2311 | struct inet6_dev *idev; | |
2312 | ||
2313 | ASSERT_RTNL(); | |
2314 | ||
e21e8467 SH |
2315 | idev = ipv6_find_idev(dev); |
2316 | if (!idev) | |
64e724f6 BH |
2317 | return ERR_PTR(-ENOBUFS); |
2318 | ||
2319 | if (idev->cnf.disable_ipv6) | |
2320 | return ERR_PTR(-EACCES); | |
1da177e4 LT |
2321 | |
2322 | /* Add default multicast route */ | |
ba46ee4c | 2323 | if (!(dev->flags & IFF_LOOPBACK) && !netif_is_l3_master(dev)) |
4af04aba | 2324 | addrconf_add_mroute(dev); |
1da177e4 | 2325 | |
1da177e4 LT |
2326 | return idev; |
2327 | } | |
2328 | ||
53bd6749 JP |
2329 | static void manage_tempaddrs(struct inet6_dev *idev, |
2330 | struct inet6_ifaddr *ifp, | |
2331 | __u32 valid_lft, __u32 prefered_lft, | |
2332 | bool create, unsigned long now) | |
2333 | { | |
2334 | u32 flags; | |
2335 | struct inet6_ifaddr *ift; | |
2336 | ||
2337 | read_lock_bh(&idev->lock); | |
2338 | /* update all temporary addresses in the list */ | |
2339 | list_for_each_entry(ift, &idev->tempaddr_list, tmp_list) { | |
2340 | int age, max_valid, max_prefered; | |
2341 | ||
2342 | if (ifp != ift->ifpub) | |
2343 | continue; | |
2344 | ||
2345 | /* RFC 4941 section 3.3: | |
2346 | * If a received option will extend the lifetime of a public | |
2347 | * address, the lifetimes of temporary addresses should | |
2348 | * be extended, subject to the overall constraint that no | |
2349 | * temporary addresses should ever remain "valid" or "preferred" | |
2350 | * for a time longer than (TEMP_VALID_LIFETIME) or | |
2351 | * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), respectively. | |
2352 | */ | |
2353 | age = (now - ift->cstamp) / HZ; | |
2354 | max_valid = idev->cnf.temp_valid_lft - age; | |
2355 | if (max_valid < 0) | |
2356 | max_valid = 0; | |
2357 | ||
2358 | max_prefered = idev->cnf.temp_prefered_lft - | |
2359 | idev->cnf.max_desync_factor - age; | |
2360 | if (max_prefered < 0) | |
2361 | max_prefered = 0; | |
2362 | ||
2363 | if (valid_lft > max_valid) | |
2364 | valid_lft = max_valid; | |
2365 | ||
2366 | if (prefered_lft > max_prefered) | |
2367 | prefered_lft = max_prefered; | |
2368 | ||
2369 | spin_lock(&ift->lock); | |
2370 | flags = ift->flags; | |
2371 | ift->valid_lft = valid_lft; | |
2372 | ift->prefered_lft = prefered_lft; | |
2373 | ift->tstamp = now; | |
2374 | if (prefered_lft > 0) | |
2375 | ift->flags &= ~IFA_F_DEPRECATED; | |
2376 | ||
2377 | spin_unlock(&ift->lock); | |
2378 | if (!(flags&IFA_F_TENTATIVE)) | |
2379 | ipv6_ifa_notify(0, ift); | |
2380 | } | |
2381 | ||
2382 | if ((create || list_empty(&idev->tempaddr_list)) && | |
2383 | idev->cnf.use_tempaddr > 0) { | |
2384 | /* When a new public address is created as described | |
2385 | * in [ADDRCONF], also create a new temporary address. | |
2386 | * Also create a temporary address if it's enabled but | |
2387 | * no temporary address currently exists. | |
2388 | */ | |
2389 | read_unlock_bh(&idev->lock); | |
2390 | ipv6_create_tempaddr(ifp, NULL); | |
2391 | } else { | |
2392 | read_unlock_bh(&idev->lock); | |
2393 | } | |
2394 | } | |
2395 | ||
cc9da6cc BM |
2396 | static bool is_addr_mode_generate_stable(struct inet6_dev *idev) |
2397 | { | |
2398 | return idev->addr_gen_mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY || | |
2399 | idev->addr_gen_mode == IN6_ADDR_GEN_MODE_RANDOM; | |
2400 | } | |
2401 | ||
cc84b3c6 AA |
2402 | int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev, |
2403 | const struct prefix_info *pinfo, | |
2404 | struct inet6_dev *in6_dev, | |
2405 | const struct in6_addr *addr, int addr_type, | |
2406 | u32 addr_flags, bool sllao, bool tokenized, | |
2407 | __u32 valid_lft, u32 prefered_lft) | |
4f672235 AA |
2408 | { |
2409 | struct inet6_ifaddr *ifp = ipv6_get_ifaddr(net, addr, dev, 1); | |
2410 | int create = 0, update_lft = 0; | |
2411 | ||
2412 | if (!ifp && valid_lft) { | |
2413 | int max_addresses = in6_dev->cnf.max_addresses; | |
2414 | ||
2415 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2416 | if (in6_dev->cnf.optimistic_dad && | |
2417 | !net->ipv6.devconf_all->forwarding && sllao) | |
2418 | addr_flags |= IFA_F_OPTIMISTIC; | |
2419 | #endif | |
2420 | ||
2421 | /* Do not allow to create too much of autoconfigured | |
2422 | * addresses; this would be too easy way to crash kernel. | |
2423 | */ | |
2424 | if (!max_addresses || | |
2425 | ipv6_count_addresses(in6_dev) < max_addresses) | |
2426 | ifp = ipv6_add_addr(in6_dev, addr, NULL, | |
2427 | pinfo->prefix_len, | |
2428 | addr_type&IPV6_ADDR_SCOPE_MASK, | |
2429 | addr_flags, valid_lft, | |
2430 | prefered_lft); | |
2431 | ||
2432 | if (IS_ERR_OR_NULL(ifp)) | |
2433 | return -1; | |
2434 | ||
2435 | update_lft = 0; | |
2436 | create = 1; | |
2437 | spin_lock_bh(&ifp->lock); | |
2438 | ifp->flags |= IFA_F_MANAGETEMPADDR; | |
2439 | ifp->cstamp = jiffies; | |
2440 | ifp->tokenized = tokenized; | |
2441 | spin_unlock_bh(&ifp->lock); | |
2442 | addrconf_dad_start(ifp); | |
2443 | } | |
2444 | ||
2445 | if (ifp) { | |
2446 | u32 flags; | |
2447 | unsigned long now; | |
2448 | u32 stored_lft; | |
2449 | ||
2450 | /* update lifetime (RFC2462 5.5.3 e) */ | |
2451 | spin_lock_bh(&ifp->lock); | |
2452 | now = jiffies; | |
2453 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
2454 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
2455 | else | |
2456 | stored_lft = 0; | |
2457 | if (!update_lft && !create && stored_lft) { | |
2458 | const u32 minimum_lft = min_t(u32, | |
2459 | stored_lft, MIN_VALID_LIFETIME); | |
2460 | valid_lft = max(valid_lft, minimum_lft); | |
2461 | ||
2462 | /* RFC4862 Section 5.5.3e: | |
2463 | * "Note that the preferred lifetime of the | |
2464 | * corresponding address is always reset to | |
2465 | * the Preferred Lifetime in the received | |
2466 | * Prefix Information option, regardless of | |
2467 | * whether the valid lifetime is also reset or | |
2468 | * ignored." | |
2469 | * | |
2470 | * So we should always update prefered_lft here. | |
2471 | */ | |
2472 | update_lft = 1; | |
2473 | } | |
2474 | ||
2475 | if (update_lft) { | |
2476 | ifp->valid_lft = valid_lft; | |
2477 | ifp->prefered_lft = prefered_lft; | |
2478 | ifp->tstamp = now; | |
2479 | flags = ifp->flags; | |
2480 | ifp->flags &= ~IFA_F_DEPRECATED; | |
2481 | spin_unlock_bh(&ifp->lock); | |
2482 | ||
2483 | if (!(flags&IFA_F_TENTATIVE)) | |
2484 | ipv6_ifa_notify(0, ifp); | |
2485 | } else | |
2486 | spin_unlock_bh(&ifp->lock); | |
2487 | ||
2488 | manage_tempaddrs(in6_dev, ifp, valid_lft, prefered_lft, | |
2489 | create, now); | |
2490 | ||
2491 | in6_ifa_put(ifp); | |
2492 | addrconf_verify(); | |
2493 | } | |
2494 | ||
2495 | return 0; | |
2496 | } | |
cc84b3c6 | 2497 | EXPORT_SYMBOL_GPL(addrconf_prefix_rcv_add_addr); |
4f672235 | 2498 | |
e6bff995 | 2499 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao) |
1da177e4 LT |
2500 | { |
2501 | struct prefix_info *pinfo; | |
2502 | __u32 valid_lft; | |
2503 | __u32 prefered_lft; | |
4f672235 | 2504 | int addr_type, err; |
64236f3f | 2505 | u32 addr_flags = 0; |
1da177e4 | 2506 | struct inet6_dev *in6_dev; |
56d417b1 | 2507 | struct net *net = dev_net(dev); |
1da177e4 LT |
2508 | |
2509 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 2510 | |
1da177e4 | 2511 | if (len < sizeof(struct prefix_info)) { |
ba3542e1 | 2512 | ADBG("addrconf: prefix option too short\n"); |
1da177e4 LT |
2513 | return; |
2514 | } | |
1ab1457c | 2515 | |
1da177e4 LT |
2516 | /* |
2517 | * Validation checks ([ADDRCONF], page 19) | |
2518 | */ | |
2519 | ||
2520 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
2521 | ||
2522 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
2523 | return; | |
2524 | ||
2525 | valid_lft = ntohl(pinfo->valid); | |
2526 | prefered_lft = ntohl(pinfo->prefered); | |
2527 | ||
2528 | if (prefered_lft > valid_lft) { | |
e87cc472 | 2529 | net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n"); |
1da177e4 LT |
2530 | return; |
2531 | } | |
2532 | ||
2533 | in6_dev = in6_dev_get(dev); | |
2534 | ||
63159f29 | 2535 | if (!in6_dev) { |
e87cc472 JP |
2536 | net_dbg_ratelimited("addrconf: device %s not configured\n", |
2537 | dev->name); | |
1da177e4 LT |
2538 | return; |
2539 | } | |
2540 | ||
2541 | /* | |
2542 | * Two things going on here: | |
2543 | * 1) Add routes for on-link prefixes | |
2544 | * 2) Configure prefixes with the auto flag set | |
2545 | */ | |
2546 | ||
4bed72e4 YH |
2547 | if (pinfo->onlink) { |
2548 | struct rt6_info *rt; | |
2549 | unsigned long rt_expires; | |
2550 | ||
6f704992 YH |
2551 | /* Avoid arithmetic overflow. Really, we could |
2552 | * save rt_expires in seconds, likely valid_lft, | |
2553 | * but it would require division in fib gc, that it | |
2554 | * not good. | |
2555 | */ | |
4bed72e4 YH |
2556 | if (HZ > USER_HZ) |
2557 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); | |
2558 | else | |
2559 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); | |
3dd4bc68 | 2560 | |
4bed72e4 YH |
2561 | if (addrconf_finite_timeout(rt_expires)) |
2562 | rt_expires *= HZ; | |
1da177e4 | 2563 | |
14ef37b6 AH |
2564 | rt = addrconf_get_prefix_route(&pinfo->prefix, |
2565 | pinfo->prefix_len, | |
2566 | dev, | |
2567 | RTF_ADDRCONF | RTF_PREFIX_RT, | |
2568 | RTF_GATEWAY | RTF_DEFAULT); | |
1da177e4 | 2569 | |
14ef37b6 | 2570 | if (rt) { |
6f704992 YH |
2571 | /* Autoconf prefix route */ |
2572 | if (valid_lft == 0) { | |
2573 | ip6_del_rt(rt); | |
2574 | rt = NULL; | |
4bed72e4 | 2575 | } else if (addrconf_finite_timeout(rt_expires)) { |
6f704992 | 2576 | /* not infinity */ |
1716a961 | 2577 | rt6_set_expires(rt, jiffies + rt_expires); |
6f704992 | 2578 | } else { |
1716a961 | 2579 | rt6_clean_expires(rt); |
1da177e4 LT |
2580 | } |
2581 | } else if (valid_lft) { | |
6f704992 | 2582 | clock_t expires = 0; |
4bed72e4 YH |
2583 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
2584 | if (addrconf_finite_timeout(rt_expires)) { | |
6f704992 YH |
2585 | /* not infinity */ |
2586 | flags |= RTF_EXPIRES; | |
2587 | expires = jiffies_to_clock_t(rt_expires); | |
2588 | } | |
1da177e4 | 2589 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
6f704992 | 2590 | dev, expires, flags); |
1da177e4 | 2591 | } |
94e187c0 | 2592 | ip6_rt_put(rt); |
1da177e4 LT |
2593 | } |
2594 | ||
2595 | /* Try to figure out our local address for this prefix */ | |
2596 | ||
2597 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
1da177e4 | 2598 | struct in6_addr addr; |
f997c55c | 2599 | bool tokenized = false, dev_addr_generated = false; |
1da177e4 LT |
2600 | |
2601 | if (pinfo->prefix_len == 64) { | |
2602 | memcpy(&addr, &pinfo->prefix, 8); | |
f53adae4 DB |
2603 | |
2604 | if (!ipv6_addr_any(&in6_dev->token)) { | |
2605 | read_lock_bh(&in6_dev->lock); | |
2606 | memcpy(addr.s6_addr + 8, | |
2607 | in6_dev->token.s6_addr + 8, 8); | |
2608 | read_unlock_bh(&in6_dev->lock); | |
617fe29d | 2609 | tokenized = true; |
cc9da6cc | 2610 | } else if (is_addr_mode_generate_stable(in6_dev) && |
622c81d5 HFS |
2611 | !ipv6_generate_stable_address(&addr, 0, |
2612 | in6_dev)) { | |
64236f3f | 2613 | addr_flags |= IFA_F_STABLE_PRIVACY; |
622c81d5 | 2614 | goto ok; |
f53adae4 DB |
2615 | } else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && |
2616 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
4f672235 | 2617 | goto put; |
f997c55c AA |
2618 | } else { |
2619 | dev_addr_generated = true; | |
1da177e4 LT |
2620 | } |
2621 | goto ok; | |
2622 | } | |
e87cc472 JP |
2623 | net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n", |
2624 | pinfo->prefix_len); | |
4f672235 | 2625 | goto put; |
1da177e4 LT |
2626 | |
2627 | ok: | |
4f672235 AA |
2628 | err = addrconf_prefix_rcv_add_addr(net, dev, pinfo, in6_dev, |
2629 | &addr, addr_type, | |
2630 | addr_flags, sllao, | |
2631 | tokenized, valid_lft, | |
2632 | prefered_lft); | |
2633 | if (err) | |
2634 | goto put; | |
f997c55c AA |
2635 | |
2636 | /* Ignore error case here because previous prefix add addr was | |
2637 | * successful which will be notified. | |
2638 | */ | |
2639 | ndisc_ops_prefix_rcv_add_addr(net, dev, pinfo, in6_dev, &addr, | |
2640 | addr_type, addr_flags, sllao, | |
2641 | tokenized, valid_lft, | |
2642 | prefered_lft, | |
2643 | dev_addr_generated); | |
1da177e4 LT |
2644 | } |
2645 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
4f672235 | 2646 | put: |
1da177e4 LT |
2647 | in6_dev_put(in6_dev); |
2648 | } | |
2649 | ||
2650 | /* | |
2651 | * Set destination address. | |
2652 | * Special case for SIT interfaces where we create a new "virtual" | |
2653 | * device. | |
2654 | */ | |
af284937 | 2655 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2656 | { |
2657 | struct in6_ifreq ireq; | |
2658 | struct net_device *dev; | |
2659 | int err = -EINVAL; | |
2660 | ||
2661 | rtnl_lock(); | |
2662 | ||
2663 | err = -EFAULT; | |
2664 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2665 | goto err_exit; | |
2666 | ||
af284937 | 2667 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
1da177e4 LT |
2668 | |
2669 | err = -ENODEV; | |
63159f29 | 2670 | if (!dev) |
1da177e4 LT |
2671 | goto err_exit; |
2672 | ||
07a93626 | 2673 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 | 2674 | if (dev->type == ARPHRD_SIT) { |
5bc3eb7e | 2675 | const struct net_device_ops *ops = dev->netdev_ops; |
1da177e4 | 2676 | struct ifreq ifr; |
1da177e4 LT |
2677 | struct ip_tunnel_parm p; |
2678 | ||
2679 | err = -EADDRNOTAVAIL; | |
2680 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
2681 | goto err_exit; | |
2682 | ||
2683 | memset(&p, 0, sizeof(p)); | |
2684 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
2685 | p.iph.saddr = 0; | |
2686 | p.iph.version = 4; | |
2687 | p.iph.ihl = 5; | |
2688 | p.iph.protocol = IPPROTO_IPV6; | |
2689 | p.iph.ttl = 64; | |
d20b3109 | 2690 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 | 2691 | |
5bc3eb7e SH |
2692 | if (ops->ndo_do_ioctl) { |
2693 | mm_segment_t oldfs = get_fs(); | |
2694 | ||
2695 | set_fs(KERNEL_DS); | |
2696 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
2697 | set_fs(oldfs); | |
2698 | } else | |
2699 | err = -EOPNOTSUPP; | |
1da177e4 LT |
2700 | |
2701 | if (err == 0) { | |
2702 | err = -ENOBUFS; | |
af284937 DL |
2703 | dev = __dev_get_by_name(net, p.name); |
2704 | if (!dev) | |
1da177e4 LT |
2705 | goto err_exit; |
2706 | err = dev_open(dev); | |
2707 | } | |
2708 | } | |
0be669bb | 2709 | #endif |
1da177e4 LT |
2710 | |
2711 | err_exit: | |
2712 | rtnl_unlock(); | |
2713 | return err; | |
2714 | } | |
2715 | ||
93a714d6 MC |
2716 | static int ipv6_mc_config(struct sock *sk, bool join, |
2717 | const struct in6_addr *addr, int ifindex) | |
2718 | { | |
2719 | int ret; | |
2720 | ||
2721 | ASSERT_RTNL(); | |
2722 | ||
2723 | lock_sock(sk); | |
2724 | if (join) | |
54ff9ef3 | 2725 | ret = ipv6_sock_mc_join(sk, ifindex, addr); |
93a714d6 | 2726 | else |
54ff9ef3 | 2727 | ret = ipv6_sock_mc_drop(sk, ifindex, addr); |
93a714d6 MC |
2728 | release_sock(sk); |
2729 | ||
2730 | return ret; | |
2731 | } | |
2732 | ||
1da177e4 LT |
2733 | /* |
2734 | * Manual configuration of address on an interface | |
2735 | */ | |
479840ff JP |
2736 | static int inet6_addr_add(struct net *net, int ifindex, |
2737 | const struct in6_addr *pfx, | |
caeaba79 | 2738 | const struct in6_addr *peer_pfx, |
479840ff JP |
2739 | unsigned int plen, __u32 ifa_flags, |
2740 | __u32 prefered_lft, __u32 valid_lft) | |
1da177e4 LT |
2741 | { |
2742 | struct inet6_ifaddr *ifp; | |
2743 | struct inet6_dev *idev; | |
2744 | struct net_device *dev; | |
93a714d6 MC |
2745 | unsigned long timeout; |
2746 | clock_t expires; | |
1da177e4 | 2747 | int scope; |
6f704992 | 2748 | u32 flags; |
1da177e4 LT |
2749 | |
2750 | ASSERT_RTNL(); | |
1ab1457c | 2751 | |
24ef0da7 TG |
2752 | if (plen > 128) |
2753 | return -EINVAL; | |
2754 | ||
0778769d NT |
2755 | /* check the lifetime */ |
2756 | if (!valid_lft || prefered_lft > valid_lft) | |
2757 | return -EINVAL; | |
2758 | ||
53bd6749 JP |
2759 | if (ifa_flags & IFA_F_MANAGETEMPADDR && plen != 64) |
2760 | return -EINVAL; | |
2761 | ||
af284937 DL |
2762 | dev = __dev_get_by_index(net, ifindex); |
2763 | if (!dev) | |
1da177e4 | 2764 | return -ENODEV; |
1ab1457c | 2765 | |
64e724f6 BH |
2766 | idev = addrconf_add_dev(dev); |
2767 | if (IS_ERR(idev)) | |
2768 | return PTR_ERR(idev); | |
1da177e4 | 2769 | |
93a714d6 MC |
2770 | if (ifa_flags & IFA_F_MCAUTOJOIN) { |
2771 | int ret = ipv6_mc_config(net->ipv6.mc_autojoin_sk, | |
2772 | true, pfx, ifindex); | |
2773 | ||
2774 | if (ret < 0) | |
2775 | return ret; | |
2776 | } | |
2777 | ||
1da177e4 LT |
2778 | scope = ipv6_addr_scope(pfx); |
2779 | ||
4bed72e4 YH |
2780 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
2781 | if (addrconf_finite_timeout(timeout)) { | |
2782 | expires = jiffies_to_clock_t(timeout * HZ); | |
2783 | valid_lft = timeout; | |
6f704992 | 2784 | flags = RTF_EXPIRES; |
4bed72e4 YH |
2785 | } else { |
2786 | expires = 0; | |
2787 | flags = 0; | |
2788 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 2789 | } |
0778769d | 2790 | |
4bed72e4 YH |
2791 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
2792 | if (addrconf_finite_timeout(timeout)) { | |
2793 | if (timeout == 0) | |
2794 | ifa_flags |= IFA_F_DEPRECATED; | |
2795 | prefered_lft = timeout; | |
2796 | } | |
0778769d | 2797 | |
8a226b2c JB |
2798 | ifp = ipv6_add_addr(idev, pfx, peer_pfx, plen, scope, ifa_flags, |
2799 | valid_lft, prefered_lft); | |
0778769d | 2800 | |
1da177e4 | 2801 | if (!IS_ERR(ifp)) { |
761aac73 TH |
2802 | if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) { |
2803 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, | |
2804 | expires, flags); | |
2805 | } | |
2806 | ||
95c385b4 NH |
2807 | /* |
2808 | * Note that section 3.1 of RFC 4429 indicates | |
2809 | * that the Optimistic flag should not be set for | |
2810 | * manually configured addresses | |
2811 | */ | |
cf22f9a2 | 2812 | addrconf_dad_start(ifp); |
53bd6749 JP |
2813 | if (ifa_flags & IFA_F_MANAGETEMPADDR) |
2814 | manage_tempaddrs(idev, ifp, valid_lft, prefered_lft, | |
2815 | true, jiffies); | |
1da177e4 | 2816 | in6_ifa_put(ifp); |
c15b1cca | 2817 | addrconf_verify_rtnl(); |
1da177e4 | 2818 | return 0; |
93a714d6 MC |
2819 | } else if (ifa_flags & IFA_F_MCAUTOJOIN) { |
2820 | ipv6_mc_config(net->ipv6.mc_autojoin_sk, | |
2821 | false, pfx, ifindex); | |
1da177e4 LT |
2822 | } |
2823 | ||
2824 | return PTR_ERR(ifp); | |
2825 | } | |
2826 | ||
6046d5b4 HK |
2827 | static int inet6_addr_del(struct net *net, int ifindex, u32 ifa_flags, |
2828 | const struct in6_addr *pfx, unsigned int plen) | |
1da177e4 LT |
2829 | { |
2830 | struct inet6_ifaddr *ifp; | |
2831 | struct inet6_dev *idev; | |
2832 | struct net_device *dev; | |
1ab1457c | 2833 | |
24ef0da7 TG |
2834 | if (plen > 128) |
2835 | return -EINVAL; | |
2836 | ||
af284937 DL |
2837 | dev = __dev_get_by_index(net, ifindex); |
2838 | if (!dev) | |
1da177e4 LT |
2839 | return -ENODEV; |
2840 | ||
e5d08d71 | 2841 | idev = __in6_dev_get(dev); |
63159f29 | 2842 | if (!idev) |
1da177e4 LT |
2843 | return -ENXIO; |
2844 | ||
2845 | read_lock_bh(&idev->lock); | |
502a2ffd | 2846 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
2847 | if (ifp->prefix_len == plen && |
2848 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
2849 | in6_ifa_hold(ifp); | |
2850 | read_unlock_bh(&idev->lock); | |
1ab1457c | 2851 | |
6046d5b4 HK |
2852 | if (!(ifp->flags & IFA_F_TEMPORARY) && |
2853 | (ifa_flags & IFA_F_MANAGETEMPADDR)) | |
2854 | manage_tempaddrs(idev, ifp, 0, 0, false, | |
2855 | jiffies); | |
1da177e4 | 2856 | ipv6_del_addr(ifp); |
6046d5b4 | 2857 | addrconf_verify_rtnl(); |
93a714d6 MC |
2858 | if (ipv6_addr_is_multicast(pfx)) { |
2859 | ipv6_mc_config(net->ipv6.mc_autojoin_sk, | |
2860 | false, pfx, dev->ifindex); | |
2861 | } | |
1da177e4 LT |
2862 | return 0; |
2863 | } | |
2864 | } | |
2865 | read_unlock_bh(&idev->lock); | |
2866 | return -EADDRNOTAVAIL; | |
2867 | } | |
2868 | ||
2869 | ||
af284937 | 2870 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2871 | { |
2872 | struct in6_ifreq ireq; | |
2873 | int err; | |
1ab1457c | 2874 | |
af31f412 | 2875 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 | 2876 | return -EPERM; |
1ab1457c | 2877 | |
1da177e4 LT |
2878 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2879 | return -EFAULT; | |
2880 | ||
2881 | rtnl_lock(); | |
caeaba79 | 2882 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, NULL, |
af284937 DL |
2883 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, |
2884 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 LT |
2885 | rtnl_unlock(); |
2886 | return err; | |
2887 | } | |
2888 | ||
af284937 | 2889 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2890 | { |
2891 | struct in6_ifreq ireq; | |
2892 | int err; | |
1ab1457c | 2893 | |
af31f412 | 2894 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
2895 | return -EPERM; |
2896 | ||
2897 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2898 | return -EFAULT; | |
2899 | ||
2900 | rtnl_lock(); | |
6046d5b4 | 2901 | err = inet6_addr_del(net, ireq.ifr6_ifindex, 0, &ireq.ifr6_addr, |
af284937 | 2902 | ireq.ifr6_prefixlen); |
1da177e4 LT |
2903 | rtnl_unlock(); |
2904 | return err; | |
2905 | } | |
2906 | ||
b5f348e5 IJ |
2907 | static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
2908 | int plen, int scope) | |
2909 | { | |
2910 | struct inet6_ifaddr *ifp; | |
2911 | ||
8a226b2c | 2912 | ifp = ipv6_add_addr(idev, addr, NULL, plen, |
07edd741 HFS |
2913 | scope, IFA_F_PERMANENT, |
2914 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
b5f348e5 IJ |
2915 | if (!IS_ERR(ifp)) { |
2916 | spin_lock_bh(&ifp->lock); | |
2917 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2918 | spin_unlock_bh(&ifp->lock); | |
2919 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2920 | in6_ifa_put(ifp); | |
2921 | } | |
2922 | } | |
2923 | ||
07a93626 | 2924 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2925 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2926 | { | |
1da177e4 LT |
2927 | struct in6_addr addr; |
2928 | struct net_device *dev; | |
c346dca1 | 2929 | struct net *net = dev_net(idev->dev); |
929c9cf3 | 2930 | int scope, plen; |
f0e2acfa | 2931 | u32 pflags = 0; |
1da177e4 LT |
2932 | |
2933 | ASSERT_RTNL(); | |
2934 | ||
2935 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2936 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2937 | ||
2938 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2939 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2940 | scope = IFA_LINK; | |
929c9cf3 | 2941 | plen = 64; |
1da177e4 LT |
2942 | } else { |
2943 | scope = IPV6_ADDR_COMPATv4; | |
929c9cf3 | 2944 | plen = 96; |
f0e2acfa | 2945 | pflags |= RTF_NONEXTHOP; |
1da177e4 LT |
2946 | } |
2947 | ||
2948 | if (addr.s6_addr32[3]) { | |
929c9cf3 | 2949 | add_addr(idev, &addr, plen, scope); |
f0e2acfa | 2950 | addrconf_prefix_route(&addr, plen, idev->dev, 0, pflags); |
1da177e4 LT |
2951 | return; |
2952 | } | |
2953 | ||
6fda7350 | 2954 | for_each_netdev(net, dev) { |
8e5e8f30 | 2955 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 | 2956 | if (in_dev && (dev->flags & IFF_UP)) { |
8e5e8f30 | 2957 | struct in_ifaddr *ifa; |
1da177e4 LT |
2958 | |
2959 | int flag = scope; | |
2960 | ||
2961 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
1da177e4 LT |
2962 | |
2963 | addr.s6_addr32[3] = ifa->ifa_local; | |
2964 | ||
2965 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2966 | continue; | |
2967 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2968 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2969 | continue; | |
2970 | flag |= IFA_HOST; | |
2971 | } | |
1da177e4 | 2972 | |
b5f348e5 | 2973 | add_addr(idev, &addr, plen, flag); |
f0e2acfa ND |
2974 | addrconf_prefix_route(&addr, plen, idev->dev, 0, |
2975 | pflags); | |
1da177e4 LT |
2976 | } |
2977 | } | |
1ab1457c | 2978 | } |
1da177e4 | 2979 | } |
0be669bb | 2980 | #endif |
1da177e4 LT |
2981 | |
2982 | static void init_loopback(struct net_device *dev) | |
2983 | { | |
2984 | struct inet6_dev *idev; | |
25fb6ca4 BK |
2985 | struct net_device *sp_dev; |
2986 | struct inet6_ifaddr *sp_ifa; | |
2987 | struct rt6_info *sp_rt; | |
1da177e4 LT |
2988 | |
2989 | /* ::1 */ | |
2990 | ||
2991 | ASSERT_RTNL(); | |
2992 | ||
e5d08d71 | 2993 | idev = ipv6_find_idev(dev); |
63159f29 | 2994 | if (!idev) { |
91df42be | 2995 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
2996 | return; |
2997 | } | |
2998 | ||
b5f348e5 | 2999 | add_addr(idev, &in6addr_loopback, 128, IFA_HOST); |
25fb6ca4 BK |
3000 | |
3001 | /* Add routes to other interface's IPv6 addresses */ | |
3002 | for_each_netdev(dev_net(dev), sp_dev) { | |
3003 | if (!strcmp(sp_dev->name, dev->name)) | |
3004 | continue; | |
3005 | ||
3006 | idev = __in6_dev_get(sp_dev); | |
3007 | if (!idev) | |
3008 | continue; | |
3009 | ||
3010 | read_lock_bh(&idev->lock); | |
3011 | list_for_each_entry(sp_ifa, &idev->addr_list, if_list) { | |
3012 | ||
3013 | if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE)) | |
3014 | continue; | |
3015 | ||
33d99113 G |
3016 | if (sp_ifa->rt) { |
3017 | /* This dst has been added to garbage list when | |
3018 | * lo device down, release this obsolete dst and | |
3019 | * reallocate a new router for ifa. | |
3020 | */ | |
3021 | if (sp_ifa->rt->dst.obsolete > 0) { | |
3022 | ip6_rt_put(sp_ifa->rt); | |
3023 | sp_ifa->rt = NULL; | |
3024 | } else { | |
3025 | continue; | |
3026 | } | |
3027 | } | |
a881ae1f | 3028 | |
57ec0afe | 3029 | sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, false); |
25fb6ca4 BK |
3030 | |
3031 | /* Failure cases are ignored */ | |
534c8779 G |
3032 | if (!IS_ERR(sp_rt)) { |
3033 | sp_ifa->rt = sp_rt; | |
25fb6ca4 | 3034 | ip6_ins_rt(sp_rt); |
534c8779 | 3035 | } |
25fb6ca4 BK |
3036 | } |
3037 | read_unlock_bh(&idev->lock); | |
3038 | } | |
1da177e4 LT |
3039 | } |
3040 | ||
2ad3ed59 AA |
3041 | void addrconf_add_linklocal(struct inet6_dev *idev, |
3042 | const struct in6_addr *addr, u32 flags) | |
1da177e4 | 3043 | { |
8e5e8f30 | 3044 | struct inet6_ifaddr *ifp; |
64236f3f | 3045 | u32 addr_flags = flags | IFA_F_PERMANENT; |
95c385b4 NH |
3046 | |
3047 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
3048 | if (idev->cnf.optimistic_dad && | |
702beb87 | 3049 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
95c385b4 NH |
3050 | addr_flags |= IFA_F_OPTIMISTIC; |
3051 | #endif | |
1da177e4 | 3052 | |
07edd741 HFS |
3053 | ifp = ipv6_add_addr(idev, addr, NULL, 64, IFA_LINK, addr_flags, |
3054 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 | 3055 | if (!IS_ERR(ifp)) { |
46d48046 | 3056 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
cf22f9a2 | 3057 | addrconf_dad_start(ifp); |
1da177e4 LT |
3058 | in6_ifa_put(ifp); |
3059 | } | |
3060 | } | |
2ad3ed59 | 3061 | EXPORT_SYMBOL_GPL(addrconf_add_linklocal); |
1da177e4 | 3062 | |
622c81d5 HFS |
3063 | static bool ipv6_reserved_interfaceid(struct in6_addr address) |
3064 | { | |
3065 | if ((address.s6_addr32[2] | address.s6_addr32[3]) == 0) | |
3066 | return true; | |
3067 | ||
3068 | if (address.s6_addr32[2] == htonl(0x02005eff) && | |
3069 | ((address.s6_addr32[3] & htonl(0xfe000000)) == htonl(0xfe000000))) | |
3070 | return true; | |
3071 | ||
3072 | if (address.s6_addr32[2] == htonl(0xfdffffff) && | |
3073 | ((address.s6_addr32[3] & htonl(0xffffff80)) == htonl(0xffffff80))) | |
3074 | return true; | |
3075 | ||
3076 | return false; | |
3077 | } | |
3078 | ||
3079 | static int ipv6_generate_stable_address(struct in6_addr *address, | |
3080 | u8 dad_count, | |
3081 | const struct inet6_dev *idev) | |
3082 | { | |
622c81d5 HFS |
3083 | static DEFINE_SPINLOCK(lock); |
3084 | static __u32 digest[SHA_DIGEST_WORDS]; | |
3085 | static __u32 workspace[SHA_WORKSPACE_WORDS]; | |
3086 | ||
3087 | static union { | |
3088 | char __data[SHA_MESSAGE_BYTES]; | |
3089 | struct { | |
3090 | struct in6_addr secret; | |
ff40217e | 3091 | __be32 prefix[2]; |
622c81d5 HFS |
3092 | unsigned char hwaddr[MAX_ADDR_LEN]; |
3093 | u8 dad_count; | |
3094 | } __packed; | |
3095 | } data; | |
3096 | ||
3097 | struct in6_addr secret; | |
3098 | struct in6_addr temp; | |
3099 | struct net *net = dev_net(idev->dev); | |
3100 | ||
3101 | BUILD_BUG_ON(sizeof(data.__data) != sizeof(data)); | |
3102 | ||
3103 | if (idev->cnf.stable_secret.initialized) | |
3104 | secret = idev->cnf.stable_secret.secret; | |
3105 | else if (net->ipv6.devconf_dflt->stable_secret.initialized) | |
3106 | secret = net->ipv6.devconf_dflt->stable_secret.secret; | |
3107 | else | |
3108 | return -1; | |
3109 | ||
3110 | retry: | |
3111 | spin_lock_bh(&lock); | |
3112 | ||
3113 | sha_init(digest); | |
3114 | memset(&data, 0, sizeof(data)); | |
3115 | memset(workspace, 0, sizeof(workspace)); | |
3116 | memcpy(data.hwaddr, idev->dev->perm_addr, idev->dev->addr_len); | |
ff40217e HFS |
3117 | data.prefix[0] = address->s6_addr32[0]; |
3118 | data.prefix[1] = address->s6_addr32[1]; | |
622c81d5 HFS |
3119 | data.secret = secret; |
3120 | data.dad_count = dad_count; | |
3121 | ||
3122 | sha_transform(digest, data.__data, workspace); | |
3123 | ||
3124 | temp = *address; | |
ff40217e HFS |
3125 | temp.s6_addr32[2] = (__force __be32)digest[0]; |
3126 | temp.s6_addr32[3] = (__force __be32)digest[1]; | |
622c81d5 HFS |
3127 | |
3128 | spin_unlock_bh(&lock); | |
3129 | ||
3130 | if (ipv6_reserved_interfaceid(temp)) { | |
3131 | dad_count++; | |
1855b7c3 | 3132 | if (dad_count > dev_net(idev->dev)->ipv6.sysctl.idgen_retries) |
622c81d5 HFS |
3133 | return -1; |
3134 | goto retry; | |
3135 | } | |
3136 | ||
3137 | *address = temp; | |
3138 | return 0; | |
3139 | } | |
3140 | ||
cc9da6cc BM |
3141 | static void ipv6_gen_mode_random_init(struct inet6_dev *idev) |
3142 | { | |
3143 | struct ipv6_stable_secret *s = &idev->cnf.stable_secret; | |
3144 | ||
3145 | if (s->initialized) | |
3146 | return; | |
3147 | s = &idev->cnf.stable_secret; | |
3148 | get_random_bytes(&s->secret, sizeof(s->secret)); | |
3149 | s->initialized = true; | |
3150 | } | |
3151 | ||
bc91b0f0 JP |
3152 | static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route) |
3153 | { | |
622c81d5 HFS |
3154 | struct in6_addr addr; |
3155 | ||
ca254490 DA |
3156 | /* no link local addresses on L3 master devices */ |
3157 | if (netif_is_l3_master(idev->dev)) | |
3158 | return; | |
3159 | ||
622c81d5 | 3160 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); |
bc91b0f0 | 3161 | |
cc9da6cc BM |
3162 | switch (idev->addr_gen_mode) { |
3163 | case IN6_ADDR_GEN_MODE_RANDOM: | |
3164 | ipv6_gen_mode_random_init(idev); | |
3165 | /* fallthrough */ | |
3166 | case IN6_ADDR_GEN_MODE_STABLE_PRIVACY: | |
622c81d5 | 3167 | if (!ipv6_generate_stable_address(&addr, 0, idev)) |
64236f3f HFS |
3168 | addrconf_add_linklocal(idev, &addr, |
3169 | IFA_F_STABLE_PRIVACY); | |
622c81d5 HFS |
3170 | else if (prefix_route) |
3171 | addrconf_prefix_route(&addr, 64, idev->dev, 0, 0); | |
cc9da6cc BM |
3172 | break; |
3173 | case IN6_ADDR_GEN_MODE_EUI64: | |
bc91b0f0 JP |
3174 | /* addrconf_add_linklocal also adds a prefix_route and we |
3175 | * only need to care about prefix routes if ipv6_generate_eui64 | |
3176 | * couldn't generate one. | |
3177 | */ | |
3178 | if (ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) == 0) | |
64236f3f | 3179 | addrconf_add_linklocal(idev, &addr, 0); |
bc91b0f0 JP |
3180 | else if (prefix_route) |
3181 | addrconf_prefix_route(&addr, 64, idev->dev, 0, 0); | |
cc9da6cc BM |
3182 | break; |
3183 | case IN6_ADDR_GEN_MODE_NONE: | |
3184 | default: | |
3185 | /* will not add any link local address */ | |
3186 | break; | |
bc91b0f0 JP |
3187 | } |
3188 | } | |
3189 | ||
1da177e4 LT |
3190 | static void addrconf_dev_config(struct net_device *dev) |
3191 | { | |
8e5e8f30 | 3192 | struct inet6_dev *idev; |
1da177e4 LT |
3193 | |
3194 | ASSERT_RTNL(); | |
3195 | ||
74235a25 HX |
3196 | if ((dev->type != ARPHRD_ETHER) && |
3197 | (dev->type != ARPHRD_FDDI) && | |
74235a25 | 3198 | (dev->type != ARPHRD_ARCNET) && |
06a4c1c5 | 3199 | (dev->type != ARPHRD_INFINIBAND) && |
e837735e | 3200 | (dev->type != ARPHRD_IEEE1394) && |
e74bccb8 | 3201 | (dev->type != ARPHRD_TUNNEL6) && |
cc9da6cc BM |
3202 | (dev->type != ARPHRD_6LOWPAN) && |
3203 | (dev->type != ARPHRD_NONE)) { | |
74235a25 HX |
3204 | /* Alas, we support only Ethernet autoconfiguration. */ |
3205 | return; | |
3206 | } | |
3207 | ||
1da177e4 | 3208 | idev = addrconf_add_dev(dev); |
64e724f6 | 3209 | if (IS_ERR(idev)) |
1da177e4 LT |
3210 | return; |
3211 | ||
cc9da6cc BM |
3212 | /* this device type has no EUI support */ |
3213 | if (dev->type == ARPHRD_NONE && | |
3214 | idev->addr_gen_mode == IN6_ADDR_GEN_MODE_EUI64) | |
3215 | idev->addr_gen_mode = IN6_ADDR_GEN_MODE_RANDOM; | |
3216 | ||
bc91b0f0 | 3217 | addrconf_addr_gen(idev, false); |
1da177e4 LT |
3218 | } |
3219 | ||
07a93626 | 3220 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
3221 | static void addrconf_sit_config(struct net_device *dev) |
3222 | { | |
3223 | struct inet6_dev *idev; | |
3224 | ||
3225 | ASSERT_RTNL(); | |
3226 | ||
1ab1457c YH |
3227 | /* |
3228 | * Configure the tunnel with one of our IPv4 | |
3229 | * addresses... we should configure all of | |
1da177e4 LT |
3230 | * our v4 addrs in the tunnel |
3231 | */ | |
3232 | ||
e5d08d71 | 3233 | idev = ipv6_find_idev(dev); |
63159f29 | 3234 | if (!idev) { |
91df42be | 3235 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
3236 | return; |
3237 | } | |
3238 | ||
c7dc89c0 | 3239 | if (dev->priv_flags & IFF_ISATAP) { |
bc91b0f0 | 3240 | addrconf_addr_gen(idev, false); |
c7dc89c0 FT |
3241 | return; |
3242 | } | |
3243 | ||
1da177e4 LT |
3244 | sit_add_v4_addrs(idev); |
3245 | ||
62b54dd9 | 3246 | if (dev->flags&IFF_POINTOPOINT) |
1da177e4 | 3247 | addrconf_add_mroute(dev); |
1da177e4 | 3248 | } |
0be669bb | 3249 | #endif |
1da177e4 | 3250 | |
07a93626 | 3251 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
aee80b54 | 3252 | static void addrconf_gre_config(struct net_device *dev) |
3253 | { | |
3254 | struct inet6_dev *idev; | |
aee80b54 | 3255 | |
aee80b54 | 3256 | ASSERT_RTNL(); |
3257 | ||
e5d08d71 | 3258 | idev = ipv6_find_idev(dev); |
63159f29 | 3259 | if (!idev) { |
91df42be | 3260 | pr_debug("%s: add_dev failed\n", __func__); |
aee80b54 | 3261 | return; |
3262 | } | |
3263 | ||
bc91b0f0 | 3264 | addrconf_addr_gen(idev, true); |
d9e4ce65 HFS |
3265 | if (dev->flags & IFF_POINTOPOINT) |
3266 | addrconf_add_mroute(dev); | |
aee80b54 | 3267 | } |
3268 | #endif | |
3269 | ||
f1705ec1 DA |
3270 | static int fixup_permanent_addr(struct inet6_dev *idev, |
3271 | struct inet6_ifaddr *ifp) | |
3272 | { | |
3273 | if (!ifp->rt) { | |
3274 | struct rt6_info *rt; | |
3275 | ||
3276 | rt = addrconf_dst_alloc(idev, &ifp->addr, false); | |
3277 | if (unlikely(IS_ERR(rt))) | |
3278 | return PTR_ERR(rt); | |
3279 | ||
3280 | ifp->rt = rt; | |
3281 | } | |
3282 | ||
3283 | if (!(ifp->flags & IFA_F_NOPREFIXROUTE)) { | |
3284 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, | |
3285 | idev->dev, 0, 0); | |
3286 | } | |
3287 | ||
3288 | addrconf_dad_start(ifp); | |
3289 | ||
3290 | return 0; | |
3291 | } | |
3292 | ||
3293 | static void addrconf_permanent_addr(struct net_device *dev) | |
3294 | { | |
3295 | struct inet6_ifaddr *ifp, *tmp; | |
3296 | struct inet6_dev *idev; | |
3297 | ||
3298 | idev = __in6_dev_get(dev); | |
3299 | if (!idev) | |
3300 | return; | |
3301 | ||
3302 | write_lock_bh(&idev->lock); | |
3303 | ||
3304 | list_for_each_entry_safe(ifp, tmp, &idev->addr_list, if_list) { | |
3305 | if ((ifp->flags & IFA_F_PERMANENT) && | |
3306 | fixup_permanent_addr(idev, ifp) < 0) { | |
3307 | write_unlock_bh(&idev->lock); | |
3308 | ipv6_del_addr(ifp); | |
3309 | write_lock_bh(&idev->lock); | |
3310 | ||
3311 | net_info_ratelimited("%s: Failed to add prefix route for address %pI6c; dropping\n", | |
3312 | idev->dev->name, &ifp->addr); | |
3313 | } | |
3314 | } | |
3315 | ||
3316 | write_unlock_bh(&idev->lock); | |
3317 | } | |
3318 | ||
1ab1457c | 3319 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
351638e7 | 3320 | void *ptr) |
1da177e4 | 3321 | { |
351638e7 | 3322 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
4f7f34ea | 3323 | struct netdev_notifier_changeupper_info *info; |
748e2d93 | 3324 | struct inet6_dev *idev = __in6_dev_get(dev); |
c5e33bdd | 3325 | int run_pending = 0; |
b217d616 | 3326 | int err; |
1da177e4 | 3327 | |
e21e8467 | 3328 | switch (event) { |
45ba9dd2 | 3329 | case NETDEV_REGISTER: |
74235a25 | 3330 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 | 3331 | idev = ipv6_add_dev(dev); |
a317a2f1 WC |
3332 | if (IS_ERR(idev)) |
3333 | return notifier_from_errno(PTR_ERR(idev)); | |
45ba9dd2 YH |
3334 | } |
3335 | break; | |
bcdd553f | 3336 | |
b7b0b1d2 AD |
3337 | case NETDEV_CHANGEMTU: |
3338 | /* if MTU under IPV6_MIN_MTU stop IPv6 on this interface. */ | |
3339 | if (dev->mtu < IPV6_MIN_MTU) { | |
3340 | addrconf_ifdown(dev, 1); | |
3341 | break; | |
3342 | } | |
3343 | ||
3344 | if (idev) { | |
3345 | rt6_mtu_change(dev, dev->mtu); | |
3346 | idev->cnf.mtu6 = dev->mtu; | |
3347 | break; | |
3348 | } | |
3349 | ||
3350 | /* allocate new idev */ | |
3351 | idev = ipv6_add_dev(dev); | |
3352 | if (IS_ERR(idev)) | |
3353 | break; | |
3354 | ||
3355 | /* device is still not ready */ | |
3356 | if (!(idev->if_flags & IF_READY)) | |
3357 | break; | |
3358 | ||
3359 | run_pending = 1; | |
3360 | ||
3361 | /* fall through */ | |
3362 | ||
1da177e4 | 3363 | case NETDEV_UP: |
3c21edbd | 3364 | case NETDEV_CHANGE: |
c2edacf8 JV |
3365 | if (dev->flags & IFF_SLAVE) |
3366 | break; | |
3367 | ||
3ce62a84 WC |
3368 | if (idev && idev->cnf.disable_ipv6) |
3369 | break; | |
3370 | ||
3c21edbd | 3371 | if (event == NETDEV_UP) { |
38bd10c4 DA |
3372 | /* restore routes for permanent addresses */ |
3373 | addrconf_permanent_addr(dev); | |
3374 | ||
f24e3d65 | 3375 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd | 3376 | /* device is not ready yet. */ |
f3213831 | 3377 | pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n", |
3c21edbd YH |
3378 | dev->name); |
3379 | break; | |
3380 | } | |
99081049 | 3381 | |
d31c7b8f EP |
3382 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
3383 | idev = ipv6_add_dev(dev); | |
3384 | ||
a317a2f1 | 3385 | if (!IS_ERR_OR_NULL(idev)) { |
99081049 | 3386 | idev->if_flags |= IF_READY; |
e3ec6cfc BT |
3387 | run_pending = 1; |
3388 | } | |
b7b0b1d2 | 3389 | } else if (event == NETDEV_CHANGE) { |
f24e3d65 | 3390 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
3391 | /* device is still not ready. */ |
3392 | break; | |
3393 | } | |
3394 | ||
3395 | if (idev) { | |
bcdd553f | 3396 | if (idev->if_flags & IF_READY) |
3c21edbd YH |
3397 | /* device is already configured. */ |
3398 | break; | |
3c21edbd YH |
3399 | idev->if_flags |= IF_READY; |
3400 | } | |
3401 | ||
f3213831 JP |
3402 | pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n", |
3403 | dev->name); | |
3c21edbd | 3404 | |
c5e33bdd | 3405 | run_pending = 1; |
3c21edbd YH |
3406 | } |
3407 | ||
e21e8467 | 3408 | switch (dev->type) { |
07a93626 | 3409 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
3410 | case ARPHRD_SIT: |
3411 | addrconf_sit_config(dev); | |
3412 | break; | |
aee80b54 | 3413 | #endif |
07a93626 | 3414 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
aee80b54 | 3415 | case ARPHRD_IPGRE: |
3416 | addrconf_gre_config(dev); | |
3417 | break; | |
0be669bb | 3418 | #endif |
1da177e4 LT |
3419 | case ARPHRD_LOOPBACK: |
3420 | init_loopback(dev); | |
3421 | break; | |
3422 | ||
3423 | default: | |
3424 | addrconf_dev_config(dev); | |
3425 | break; | |
3ff50b79 | 3426 | } |
bcdd553f | 3427 | |
a317a2f1 | 3428 | if (!IS_ERR_OR_NULL(idev)) { |
c5e33bdd YH |
3429 | if (run_pending) |
3430 | addrconf_dad_run(idev); | |
3431 | ||
bcdd553f SH |
3432 | /* |
3433 | * If the MTU changed during the interface down, | |
3434 | * when the interface up, the changed MTU must be | |
3435 | * reflected in the idev as well as routers. | |
1da177e4 | 3436 | */ |
bcdd553f SH |
3437 | if (idev->cnf.mtu6 != dev->mtu && |
3438 | dev->mtu >= IPV6_MIN_MTU) { | |
1da177e4 LT |
3439 | rt6_mtu_change(dev, dev->mtu); |
3440 | idev->cnf.mtu6 = dev->mtu; | |
3441 | } | |
3442 | idev->tstamp = jiffies; | |
3443 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
bcdd553f SH |
3444 | |
3445 | /* | |
3446 | * If the changed mtu during down is lower than | |
3447 | * IPV6_MIN_MTU stop IPv6 on this interface. | |
1da177e4 LT |
3448 | */ |
3449 | if (dev->mtu < IPV6_MIN_MTU) | |
bcdd553f | 3450 | addrconf_ifdown(dev, 1); |
1da177e4 LT |
3451 | } |
3452 | break; | |
3453 | ||
1da177e4 LT |
3454 | case NETDEV_DOWN: |
3455 | case NETDEV_UNREGISTER: | |
3456 | /* | |
3457 | * Remove all addresses from this interface. | |
3458 | */ | |
3459 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
3460 | break; | |
3c21edbd | 3461 | |
1da177e4 | 3462 | case NETDEV_CHANGENAME: |
1da177e4 | 3463 | if (idev) { |
5632c515 | 3464 | snmp6_unregister_dev(idev); |
408c4768 | 3465 | addrconf_sysctl_unregister(idev); |
a317a2f1 | 3466 | err = addrconf_sysctl_register(idev); |
b217d616 HX |
3467 | if (err) |
3468 | return notifier_from_errno(err); | |
a317a2f1 WC |
3469 | err = snmp6_register_dev(idev); |
3470 | if (err) { | |
3471 | addrconf_sysctl_unregister(idev); | |
3472 | return notifier_from_errno(err); | |
3473 | } | |
5632c515 | 3474 | } |
1da177e4 | 3475 | break; |
bcdd553f | 3476 | |
93d9b7d7 JP |
3477 | case NETDEV_PRE_TYPE_CHANGE: |
3478 | case NETDEV_POST_TYPE_CHANGE: | |
3ef0952c AL |
3479 | if (idev) |
3480 | addrconf_type_change(dev, event); | |
75c78500 | 3481 | break; |
4f7f34ea DA |
3482 | |
3483 | case NETDEV_CHANGEUPPER: | |
3484 | info = ptr; | |
3485 | ||
3486 | /* flush all routes if dev is linked to or unlinked from | |
3487 | * an L3 master device (e.g., VRF) | |
3488 | */ | |
3489 | if (info->upper_dev && netif_is_l3_master(info->upper_dev)) | |
3490 | addrconf_ifdown(dev, 0); | |
3ff50b79 | 3491 | } |
1da177e4 LT |
3492 | |
3493 | return NOTIFY_OK; | |
3494 | } | |
3495 | ||
3496 | /* | |
3497 | * addrconf module should be notified of a device going up | |
3498 | */ | |
3499 | static struct notifier_block ipv6_dev_notf = { | |
3500 | .notifier_call = addrconf_notify, | |
1da177e4 LT |
3501 | }; |
3502 | ||
93d9b7d7 | 3503 | static void addrconf_type_change(struct net_device *dev, unsigned long event) |
75c78500 MS |
3504 | { |
3505 | struct inet6_dev *idev; | |
3506 | ASSERT_RTNL(); | |
3507 | ||
3508 | idev = __in6_dev_get(dev); | |
3509 | ||
93d9b7d7 | 3510 | if (event == NETDEV_POST_TYPE_CHANGE) |
75c78500 | 3511 | ipv6_mc_remap(idev); |
93d9b7d7 | 3512 | else if (event == NETDEV_PRE_TYPE_CHANGE) |
75c78500 MS |
3513 | ipv6_mc_unmap(idev); |
3514 | } | |
3515 | ||
70af921d DA |
3516 | static bool addr_is_local(const struct in6_addr *addr) |
3517 | { | |
3518 | return ipv6_addr_type(addr) & | |
3519 | (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_LOOPBACK); | |
3520 | } | |
3521 | ||
1da177e4 LT |
3522 | static int addrconf_ifdown(struct net_device *dev, int how) |
3523 | { | |
c346dca1 | 3524 | struct net *net = dev_net(dev); |
502a2ffd | 3525 | struct inet6_dev *idev; |
f1705ec1 DA |
3526 | struct inet6_ifaddr *ifa, *tmp; |
3527 | struct list_head del_list; | |
3528 | int _keep_addr; | |
3529 | bool keep_addr; | |
73a8bd74 | 3530 | int state, i; |
1da177e4 LT |
3531 | |
3532 | ASSERT_RTNL(); | |
3533 | ||
73a8bd74 DM |
3534 | rt6_ifdown(net, dev); |
3535 | neigh_ifdown(&nd_tbl, dev); | |
1da177e4 LT |
3536 | |
3537 | idev = __in6_dev_get(dev); | |
63159f29 | 3538 | if (!idev) |
1da177e4 LT |
3539 | return -ENODEV; |
3540 | ||
bcdd553f SH |
3541 | /* |
3542 | * Step 1: remove reference to ipv6 device from parent device. | |
3543 | * Do not dev_put! | |
1da177e4 | 3544 | */ |
439e2385 | 3545 | if (how) { |
1da177e4 | 3546 | idev->dead = 1; |
8814c4b5 YH |
3547 | |
3548 | /* protected by rtnl_lock */ | |
a9b3cd7f | 3549 | RCU_INIT_POINTER(dev->ip6_ptr, NULL); |
1da177e4 LT |
3550 | |
3551 | /* Step 1.5: remove snmp6 entry */ | |
3552 | snmp6_unregister_dev(idev); | |
3553 | ||
3554 | } | |
3555 | ||
f1705ec1 DA |
3556 | /* aggregate the system setting and interface setting */ |
3557 | _keep_addr = net->ipv6.devconf_all->keep_addr_on_down; | |
3558 | if (!_keep_addr) | |
3559 | _keep_addr = idev->cnf.keep_addr_on_down; | |
3560 | ||
3561 | /* combine the user config with event to determine if permanent | |
3562 | * addresses are to be removed from address hash table | |
3563 | */ | |
bc561632 | 3564 | keep_addr = !(how || _keep_addr <= 0 || idev->cnf.disable_ipv6); |
f1705ec1 | 3565 | |
73a8bd74 DM |
3566 | /* Step 2: clear hash table */ |
3567 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { | |
3568 | struct hlist_head *h = &inet6_addr_lst[i]; | |
73a8bd74 DM |
3569 | |
3570 | spin_lock_bh(&addrconf_hash_lock); | |
67ba4152 | 3571 | restart: |
b67bfe0d | 3572 | hlist_for_each_entry_rcu(ifa, h, addr_lst) { |
73a8bd74 | 3573 | if (ifa->idev == idev) { |
c15b1cca | 3574 | addrconf_del_dad_work(ifa); |
f1705ec1 DA |
3575 | /* combined flag + permanent flag decide if |
3576 | * address is retained on a down event | |
3577 | */ | |
3578 | if (!keep_addr || | |
70af921d DA |
3579 | !(ifa->flags & IFA_F_PERMANENT) || |
3580 | addr_is_local(&ifa->addr)) { | |
f1705ec1 DA |
3581 | hlist_del_init_rcu(&ifa->addr_lst); |
3582 | goto restart; | |
3583 | } | |
73a8bd74 DM |
3584 | } |
3585 | } | |
3586 | spin_unlock_bh(&addrconf_hash_lock); | |
3587 | } | |
3588 | ||
1da177e4 LT |
3589 | write_lock_bh(&idev->lock); |
3590 | ||
b7b1bfce HFS |
3591 | addrconf_del_rs_timer(idev); |
3592 | ||
bcdd553f | 3593 | /* Step 2: clear flags for stateless addrconf */ |
439e2385 | 3594 | if (!how) |
3c21edbd | 3595 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 | 3596 | |
439e2385 | 3597 | if (how && del_timer(&idev->regen_timer)) |
1da177e4 LT |
3598 | in6_dev_put(idev); |
3599 | ||
bcdd553f | 3600 | /* Step 3: clear tempaddr list */ |
372e6c8f | 3601 | while (!list_empty(&idev->tempaddr_list)) { |
3602 | ifa = list_first_entry(&idev->tempaddr_list, | |
3603 | struct inet6_ifaddr, tmp_list); | |
3604 | list_del(&ifa->tmp_list); | |
1da177e4 LT |
3605 | write_unlock_bh(&idev->lock); |
3606 | spin_lock_bh(&ifa->lock); | |
3607 | ||
3608 | if (ifa->ifpub) { | |
3609 | in6_ifa_put(ifa->ifpub); | |
3610 | ifa->ifpub = NULL; | |
3611 | } | |
3612 | spin_unlock_bh(&ifa->lock); | |
3613 | in6_ifa_put(ifa); | |
3614 | write_lock_bh(&idev->lock); | |
3615 | } | |
8f37ada5 | 3616 | |
f1705ec1 DA |
3617 | /* re-combine the user config with event to determine if permanent |
3618 | * addresses are to be removed from the interface list | |
3619 | */ | |
bc561632 | 3620 | keep_addr = (!how && _keep_addr > 0 && !idev->cnf.disable_ipv6); |
84e8b803 | 3621 | |
f1705ec1 DA |
3622 | INIT_LIST_HEAD(&del_list); |
3623 | list_for_each_entry_safe(ifa, tmp, &idev->addr_list, if_list) { | |
38bd10c4 DA |
3624 | struct rt6_info *rt = NULL; |
3625 | ||
f1705ec1 | 3626 | addrconf_del_dad_work(ifa); |
84e8b803 | 3627 | |
73a8bd74 | 3628 | write_unlock_bh(&idev->lock); |
8e8e676d | 3629 | spin_lock_bh(&ifa->lock); |
f1705ec1 | 3630 | |
70af921d DA |
3631 | if (keep_addr && (ifa->flags & IFA_F_PERMANENT) && |
3632 | !addr_is_local(&ifa->addr)) { | |
f1705ec1 DA |
3633 | /* set state to skip the notifier below */ |
3634 | state = INET6_IFADDR_STATE_DEAD; | |
3635 | ifa->state = 0; | |
3636 | if (!(ifa->flags & IFA_F_NODAD)) | |
3637 | ifa->flags |= IFA_F_TENTATIVE; | |
38bd10c4 DA |
3638 | |
3639 | rt = ifa->rt; | |
3640 | ifa->rt = NULL; | |
f1705ec1 DA |
3641 | } else { |
3642 | state = ifa->state; | |
3643 | ifa->state = INET6_IFADDR_STATE_DEAD; | |
3644 | ||
c882219a | 3645 | list_move(&ifa->if_list, &del_list); |
f1705ec1 DA |
3646 | } |
3647 | ||
8e8e676d | 3648 | spin_unlock_bh(&ifa->lock); |
9d82ca98 | 3649 | |
38bd10c4 DA |
3650 | if (rt) |
3651 | ip6_del_rt(rt); | |
3652 | ||
73a8bd74 DM |
3653 | if (state != INET6_IFADDR_STATE_DEAD) { |
3654 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
f88c91dd | 3655 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifa); |
ea06f717 MM |
3656 | } else { |
3657 | if (idev->cnf.forwarding) | |
3658 | addrconf_leave_anycast(ifa); | |
3659 | addrconf_leave_solict(ifa->idev, &ifa->addr); | |
27bdb2ab | 3660 | } |
8f37ada5 | 3661 | |
73a8bd74 DM |
3662 | write_lock_bh(&idev->lock); |
3663 | } | |
8f37ada5 | 3664 | |
1da177e4 LT |
3665 | write_unlock_bh(&idev->lock); |
3666 | ||
f1705ec1 DA |
3667 | /* now clean up addresses to be removed */ |
3668 | while (!list_empty(&del_list)) { | |
3669 | ifa = list_first_entry(&del_list, | |
3670 | struct inet6_ifaddr, if_list); | |
3671 | list_del(&ifa->if_list); | |
3672 | ||
3673 | in6_ifa_put(ifa); | |
3674 | } | |
3675 | ||
381f4dca SD |
3676 | /* Step 5: Discard anycast and multicast list */ |
3677 | if (how) { | |
3678 | ipv6_ac_destroy_dev(idev); | |
1da177e4 | 3679 | ipv6_mc_destroy_dev(idev); |
381f4dca | 3680 | } else { |
1da177e4 | 3681 | ipv6_mc_down(idev); |
381f4dca | 3682 | } |
1da177e4 | 3683 | |
1da177e4 | 3684 | idev->tstamp = jiffies; |
1ab1457c | 3685 | |
bcdd553f | 3686 | /* Last: Shot the device (if unregistered) */ |
439e2385 | 3687 | if (how) { |
408c4768 | 3688 | addrconf_sysctl_unregister(idev); |
1da177e4 LT |
3689 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
3690 | neigh_ifdown(&nd_tbl, dev); | |
3691 | in6_dev_put(idev); | |
3692 | } | |
3693 | return 0; | |
3694 | } | |
3695 | ||
3696 | static void addrconf_rs_timer(unsigned long data) | |
3697 | { | |
b7b1bfce | 3698 | struct inet6_dev *idev = (struct inet6_dev *)data; |
caf92bc4 | 3699 | struct net_device *dev = idev->dev; |
b7b1bfce | 3700 | struct in6_addr lladdr; |
1da177e4 | 3701 | |
b7b1bfce | 3702 | write_lock(&idev->lock); |
5b2a1953 | 3703 | if (idev->dead || !(idev->if_flags & IF_READY)) |
1da177e4 LT |
3704 | goto out; |
3705 | ||
9ba2add3 | 3706 | if (!ipv6_accept_ra(idev)) |
5b2a1953 | 3707 | goto out; |
3708 | ||
3709 | /* Announcement received after solicitation was sent */ | |
3710 | if (idev->if_flags & IF_RA_RCVD) | |
1da177e4 | 3711 | goto out; |
1da177e4 | 3712 | |
bd11f074 | 3713 | if (idev->rs_probes++ < idev->cnf.rtr_solicits || idev->cnf.rtr_solicits < 0) { |
caf92bc4 CW |
3714 | write_unlock(&idev->lock); |
3715 | if (!ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) | |
3716 | ndisc_send_rs(dev, &lladdr, | |
b7b1bfce HFS |
3717 | &in6addr_linklocal_allrouters); |
3718 | else | |
caf92bc4 | 3719 | goto put; |
1da177e4 | 3720 | |
caf92bc4 | 3721 | write_lock(&idev->lock); |
bd11f074 MŻ |
3722 | idev->rs_interval = rfc3315_s14_backoff_update( |
3723 | idev->rs_interval, idev->cnf.rtr_solicit_max_interval); | |
b7b1bfce HFS |
3724 | /* The wait after the last probe can be shorter */ |
3725 | addrconf_mod_rs_timer(idev, (idev->rs_probes == | |
3726 | idev->cnf.rtr_solicits) ? | |
3727 | idev->cnf.rtr_solicit_delay : | |
bd11f074 | 3728 | idev->rs_interval); |
1da177e4 | 3729 | } else { |
1da177e4 LT |
3730 | /* |
3731 | * Note: we do not support deprecated "all on-link" | |
3732 | * assumption any longer. | |
3733 | */ | |
91df42be | 3734 | pr_debug("%s: no IPv6 routers present\n", idev->dev->name); |
1da177e4 LT |
3735 | } |
3736 | ||
3737 | out: | |
b7b1bfce | 3738 | write_unlock(&idev->lock); |
caf92bc4 | 3739 | put: |
b7b1bfce | 3740 | in6_dev_put(idev); |
1da177e4 LT |
3741 | } |
3742 | ||
3743 | /* | |
3744 | * Duplicate Address Detection | |
3745 | */ | |
3c21edbd YH |
3746 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
3747 | { | |
3748 | unsigned long rand_num; | |
3749 | struct inet6_dev *idev = ifp->idev; | |
3750 | ||
95c385b4 NH |
3751 | if (ifp->flags & IFA_F_OPTIMISTIC) |
3752 | rand_num = 0; | |
3753 | else | |
63862b5b | 3754 | rand_num = prandom_u32() % (idev->cnf.rtr_solicit_delay ? : 1); |
95c385b4 | 3755 | |
b7b1bfce | 3756 | ifp->dad_probes = idev->cnf.dad_transmits; |
c15b1cca | 3757 | addrconf_mod_dad_work(ifp, rand_num); |
3c21edbd YH |
3758 | } |
3759 | ||
c15b1cca | 3760 | static void addrconf_dad_begin(struct inet6_ifaddr *ifp) |
1da177e4 LT |
3761 | { |
3762 | struct inet6_dev *idev = ifp->idev; | |
3763 | struct net_device *dev = idev->dev; | |
16186a82 | 3764 | bool notify = false; |
1da177e4 LT |
3765 | |
3766 | addrconf_join_solict(dev, &ifp->addr); | |
3767 | ||
63862b5b | 3768 | prandom_seed((__force u32) ifp->addr.s6_addr32[3]); |
1da177e4 LT |
3769 | |
3770 | read_lock_bh(&idev->lock); | |
622ccdf1 | 3771 | spin_lock(&ifp->lock); |
e9d3e084 | 3772 | if (ifp->state == INET6_IFADDR_STATE_DEAD) |
1da177e4 | 3773 | goto out; |
1da177e4 LT |
3774 | |
3775 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
1b34be74 | 3776 | idev->cnf.accept_dad < 1 || |
55ebaef1 NT |
3777 | !(ifp->flags&IFA_F_TENTATIVE) || |
3778 | ifp->flags & IFA_F_NODAD) { | |
cc411d0b | 3779 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 3780 | spin_unlock(&ifp->lock); |
1da177e4 LT |
3781 | read_unlock_bh(&idev->lock); |
3782 | ||
3783 | addrconf_dad_completed(ifp); | |
3784 | return; | |
3785 | } | |
3786 | ||
6732bade | 3787 | if (!(idev->if_flags & IF_READY)) { |
21809faf | 3788 | spin_unlock(&ifp->lock); |
6732bade | 3789 | read_unlock_bh(&idev->lock); |
3c21edbd | 3790 | /* |
590a9887 | 3791 | * If the device is not ready: |
3c21edbd YH |
3792 | * - keep it tentative if it is a permanent address. |
3793 | * - otherwise, kill it. | |
3794 | */ | |
3795 | in6_ifa_hold(ifp); | |
cc411d0b | 3796 | addrconf_dad_stop(ifp, 0); |
6732bade | 3797 | return; |
3c21edbd | 3798 | } |
95c385b4 NH |
3799 | |
3800 | /* | |
3801 | * Optimistic nodes can start receiving | |
3802 | * Frames right away | |
3803 | */ | |
7fd2561e | 3804 | if (ifp->flags & IFA_F_OPTIMISTIC) { |
95c385b4 | 3805 | ip6_ins_rt(ifp->rt); |
7fd2561e EK |
3806 | if (ipv6_use_optimistic_addr(idev)) { |
3807 | /* Because optimistic nodes can use this address, | |
3808 | * notify listeners. If DAD fails, RTM_DELADDR is sent. | |
3809 | */ | |
16186a82 | 3810 | notify = true; |
7fd2561e EK |
3811 | } |
3812 | } | |
95c385b4 | 3813 | |
6732bade | 3814 | addrconf_dad_kick(ifp); |
1da177e4 | 3815 | out: |
622ccdf1 | 3816 | spin_unlock(&ifp->lock); |
1da177e4 | 3817 | read_unlock_bh(&idev->lock); |
16186a82 SAK |
3818 | if (notify) |
3819 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
1da177e4 LT |
3820 | } |
3821 | ||
c15b1cca | 3822 | static void addrconf_dad_start(struct inet6_ifaddr *ifp) |
1da177e4 | 3823 | { |
c15b1cca HFS |
3824 | bool begin_dad = false; |
3825 | ||
8e8e676d | 3826 | spin_lock_bh(&ifp->lock); |
c15b1cca HFS |
3827 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
3828 | ifp->state = INET6_IFADDR_STATE_PREDAD; | |
3829 | begin_dad = true; | |
3830 | } | |
8e8e676d | 3831 | spin_unlock_bh(&ifp->lock); |
c15b1cca HFS |
3832 | |
3833 | if (begin_dad) | |
3834 | addrconf_mod_dad_work(ifp, 0); | |
3835 | } | |
3836 | ||
3837 | static void addrconf_dad_work(struct work_struct *w) | |
3838 | { | |
3839 | struct inet6_ifaddr *ifp = container_of(to_delayed_work(w), | |
3840 | struct inet6_ifaddr, | |
3841 | dad_work); | |
1da177e4 | 3842 | struct inet6_dev *idev = ifp->idev; |
1da177e4 | 3843 | struct in6_addr mcaddr; |
85b51b12 | 3844 | bool disable_ipv6 = false; |
1da177e4 | 3845 | |
c15b1cca HFS |
3846 | enum { |
3847 | DAD_PROCESS, | |
3848 | DAD_BEGIN, | |
3849 | DAD_ABORT, | |
3850 | } action = DAD_PROCESS; | |
3851 | ||
3852 | rtnl_lock(); | |
3853 | ||
8e8e676d | 3854 | spin_lock_bh(&ifp->lock); |
c15b1cca HFS |
3855 | if (ifp->state == INET6_IFADDR_STATE_PREDAD) { |
3856 | action = DAD_BEGIN; | |
3857 | ifp->state = INET6_IFADDR_STATE_DAD; | |
3858 | } else if (ifp->state == INET6_IFADDR_STATE_ERRDAD) { | |
3859 | action = DAD_ABORT; | |
3860 | ifp->state = INET6_IFADDR_STATE_POSTDAD; | |
85b51b12 MM |
3861 | |
3862 | if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6 && | |
3863 | !(ifp->flags & IFA_F_STABLE_PRIVACY)) { | |
3864 | struct in6_addr addr; | |
3865 | ||
3866 | addr.s6_addr32[0] = htonl(0xfe800000); | |
3867 | addr.s6_addr32[1] = 0; | |
3868 | ||
3869 | if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && | |
3870 | ipv6_addr_equal(&ifp->addr, &addr)) { | |
3871 | /* DAD failed for link-local based on MAC */ | |
3872 | idev->cnf.disable_ipv6 = 1; | |
3873 | ||
3874 | pr_info("%s: IPv6 being disabled!\n", | |
3875 | ifp->idev->dev->name); | |
3876 | disable_ipv6 = true; | |
3877 | } | |
3878 | } | |
c15b1cca | 3879 | } |
8e8e676d | 3880 | spin_unlock_bh(&ifp->lock); |
c15b1cca HFS |
3881 | |
3882 | if (action == DAD_BEGIN) { | |
3883 | addrconf_dad_begin(ifp); | |
3884 | goto out; | |
3885 | } else if (action == DAD_ABORT) { | |
751eb6b6 | 3886 | in6_ifa_hold(ifp); |
c15b1cca | 3887 | addrconf_dad_stop(ifp, 1); |
85b51b12 MM |
3888 | if (disable_ipv6) |
3889 | addrconf_ifdown(idev->dev, 0); | |
c15b1cca HFS |
3890 | goto out; |
3891 | } | |
3892 | ||
b7b1bfce | 3893 | if (!ifp->dad_probes && addrconf_dad_end(ifp)) |
f2344a13 HX |
3894 | goto out; |
3895 | ||
c15b1cca | 3896 | write_lock_bh(&idev->lock); |
122e4519 | 3897 | if (idev->dead || !(idev->if_flags & IF_READY)) { |
c15b1cca | 3898 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
3899 | goto out; |
3900 | } | |
21809faf | 3901 | |
3902 | spin_lock(&ifp->lock); | |
622ccdf1 HX |
3903 | if (ifp->state == INET6_IFADDR_STATE_DEAD) { |
3904 | spin_unlock(&ifp->lock); | |
c15b1cca | 3905 | write_unlock_bh(&idev->lock); |
622ccdf1 HX |
3906 | goto out; |
3907 | } | |
3908 | ||
b7b1bfce | 3909 | if (ifp->dad_probes == 0) { |
1da177e4 LT |
3910 | /* |
3911 | * DAD was successful | |
3912 | */ | |
3913 | ||
cc411d0b | 3914 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 3915 | spin_unlock(&ifp->lock); |
c15b1cca | 3916 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
3917 | |
3918 | addrconf_dad_completed(ifp); | |
3919 | ||
3920 | goto out; | |
3921 | } | |
3922 | ||
b7b1bfce | 3923 | ifp->dad_probes--; |
c15b1cca HFS |
3924 | addrconf_mod_dad_work(ifp, |
3925 | NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME)); | |
21809faf | 3926 | spin_unlock(&ifp->lock); |
c15b1cca | 3927 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
3928 | |
3929 | /* send a neighbour solicitation for our addr */ | |
1da177e4 | 3930 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
304d888b | 3931 | ndisc_send_ns(ifp->idev->dev, &ifp->addr, &mcaddr, &in6addr_any); |
1da177e4 LT |
3932 | out: |
3933 | in6_ifa_put(ifp); | |
c15b1cca | 3934 | rtnl_unlock(); |
1da177e4 LT |
3935 | } |
3936 | ||
11ffff75 HFS |
3937 | /* ifp->idev must be at least read locked */ |
3938 | static bool ipv6_lonely_lladdr(struct inet6_ifaddr *ifp) | |
3939 | { | |
3940 | struct inet6_ifaddr *ifpiter; | |
3941 | struct inet6_dev *idev = ifp->idev; | |
3942 | ||
602582ca HFS |
3943 | list_for_each_entry_reverse(ifpiter, &idev->addr_list, if_list) { |
3944 | if (ifpiter->scope > IFA_LINK) | |
3945 | break; | |
11ffff75 HFS |
3946 | if (ifp != ifpiter && ifpiter->scope == IFA_LINK && |
3947 | (ifpiter->flags & (IFA_F_PERMANENT|IFA_F_TENTATIVE| | |
3948 | IFA_F_OPTIMISTIC|IFA_F_DADFAILED)) == | |
3949 | IFA_F_PERMANENT) | |
3950 | return false; | |
3951 | } | |
3952 | return true; | |
3953 | } | |
3954 | ||
1da177e4 LT |
3955 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) |
3956 | { | |
e21e8467 | 3957 | struct net_device *dev = ifp->idev->dev; |
b7b1bfce | 3958 | struct in6_addr lladdr; |
b173ee48 | 3959 | bool send_rs, send_mld; |
b7b1bfce | 3960 | |
c15b1cca | 3961 | addrconf_del_dad_work(ifp); |
1da177e4 LT |
3962 | |
3963 | /* | |
3964 | * Configure the address for reception. Now it is valid. | |
3965 | */ | |
3966 | ||
3967 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
3968 | ||
026359bc TA |
3969 | /* If added prefix is link local and we are prepared to process |
3970 | router advertisements, start sending router solicitations. | |
1da177e4 LT |
3971 | */ |
3972 | ||
1ec047eb | 3973 | read_lock_bh(&ifp->idev->lock); |
11ffff75 | 3974 | send_mld = ifp->scope == IFA_LINK && ipv6_lonely_lladdr(ifp); |
b173ee48 HFS |
3975 | send_rs = send_mld && |
3976 | ipv6_accept_ra(ifp->idev) && | |
bd11f074 | 3977 | ifp->idev->cnf.rtr_solicits != 0 && |
b173ee48 | 3978 | (dev->flags&IFF_LOOPBACK) == 0; |
1ec047eb HFS |
3979 | read_unlock_bh(&ifp->idev->lock); |
3980 | ||
b173ee48 HFS |
3981 | /* While dad is in progress mld report's source address is in6_addrany. |
3982 | * Resend with proper ll now. | |
3983 | */ | |
3984 | if (send_mld) | |
3985 | ipv6_mc_dad_complete(ifp->idev); | |
3986 | ||
1ec047eb | 3987 | if (send_rs) { |
1da177e4 LT |
3988 | /* |
3989 | * If a host as already performed a random delay | |
3990 | * [...] as part of DAD [...] there is no need | |
3991 | * to delay again before sending the first RS | |
3992 | */ | |
1ec047eb | 3993 | if (ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) |
b7b1bfce | 3994 | return; |
1ec047eb | 3995 | ndisc_send_rs(dev, &lladdr, &in6addr_linklocal_allrouters); |
1da177e4 | 3996 | |
b7b1bfce HFS |
3997 | write_lock_bh(&ifp->idev->lock); |
3998 | spin_lock(&ifp->lock); | |
bd11f074 MŻ |
3999 | ifp->idev->rs_interval = rfc3315_s14_backoff_init( |
4000 | ifp->idev->cnf.rtr_solicit_interval); | |
b7b1bfce | 4001 | ifp->idev->rs_probes = 1; |
1da177e4 | 4002 | ifp->idev->if_flags |= IF_RS_SENT; |
bd11f074 | 4003 | addrconf_mod_rs_timer(ifp->idev, ifp->idev->rs_interval); |
b7b1bfce HFS |
4004 | spin_unlock(&ifp->lock); |
4005 | write_unlock_bh(&ifp->idev->lock); | |
1da177e4 LT |
4006 | } |
4007 | } | |
4008 | ||
e21e8467 SH |
4009 | static void addrconf_dad_run(struct inet6_dev *idev) |
4010 | { | |
c5e33bdd YH |
4011 | struct inet6_ifaddr *ifp; |
4012 | ||
4013 | read_lock_bh(&idev->lock); | |
502a2ffd | 4014 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
21809faf | 4015 | spin_lock(&ifp->lock); |
f2344a13 HX |
4016 | if (ifp->flags & IFA_F_TENTATIVE && |
4017 | ifp->state == INET6_IFADDR_STATE_DAD) | |
4018 | addrconf_dad_kick(ifp); | |
21809faf | 4019 | spin_unlock(&ifp->lock); |
c5e33bdd YH |
4020 | } |
4021 | read_unlock_bh(&idev->lock); | |
4022 | } | |
4023 | ||
1da177e4 LT |
4024 | #ifdef CONFIG_PROC_FS |
4025 | struct if6_iter_state { | |
3c40090a | 4026 | struct seq_net_private p; |
1da177e4 | 4027 | int bucket; |
1d578303 | 4028 | int offset; |
1da177e4 LT |
4029 | }; |
4030 | ||
1d578303 | 4031 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos) |
1da177e4 LT |
4032 | { |
4033 | struct inet6_ifaddr *ifa = NULL; | |
4034 | struct if6_iter_state *state = seq->private; | |
1218854a | 4035 | struct net *net = seq_file_net(seq); |
1d578303 | 4036 | int p = 0; |
1da177e4 | 4037 | |
1d578303 MM |
4038 | /* initial bucket if pos is 0 */ |
4039 | if (pos == 0) { | |
4040 | state->bucket = 0; | |
4041 | state->offset = 0; | |
4042 | } | |
4043 | ||
4044 | for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
b67bfe0d | 4045 | hlist_for_each_entry_rcu_bh(ifa, &inet6_addr_lst[state->bucket], |
1d578303 | 4046 | addr_lst) { |
9f0d3c27 ED |
4047 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
4048 | continue; | |
1d578303 MM |
4049 | /* sync with offset */ |
4050 | if (p < state->offset) { | |
4051 | p++; | |
4052 | continue; | |
4053 | } | |
4054 | state->offset++; | |
9f0d3c27 | 4055 | return ifa; |
1d578303 MM |
4056 | } |
4057 | ||
4058 | /* prepare for next bucket */ | |
4059 | state->offset = 0; | |
4060 | p = 0; | |
1da177e4 | 4061 | } |
c2e21293 | 4062 | return NULL; |
1da177e4 LT |
4063 | } |
4064 | ||
c2e21293 | 4065 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, |
4066 | struct inet6_ifaddr *ifa) | |
1da177e4 LT |
4067 | { |
4068 | struct if6_iter_state *state = seq->private; | |
1218854a | 4069 | struct net *net = seq_file_net(seq); |
1da177e4 | 4070 | |
b67bfe0d | 4071 | hlist_for_each_entry_continue_rcu_bh(ifa, addr_lst) { |
9f0d3c27 ED |
4072 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
4073 | continue; | |
1d578303 | 4074 | state->offset++; |
9f0d3c27 | 4075 | return ifa; |
1d578303 | 4076 | } |
3c40090a | 4077 | |
c2e21293 | 4078 | while (++state->bucket < IN6_ADDR_HSIZE) { |
1d578303 | 4079 | state->offset = 0; |
b67bfe0d | 4080 | hlist_for_each_entry_rcu_bh(ifa, |
c2e21293 | 4081 | &inet6_addr_lst[state->bucket], addr_lst) { |
9f0d3c27 ED |
4082 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
4083 | continue; | |
1d578303 | 4084 | state->offset++; |
9f0d3c27 | 4085 | return ifa; |
c2e21293 | 4086 | } |
1da177e4 | 4087 | } |
3c40090a | 4088 | |
c2e21293 | 4089 | return NULL; |
1da177e4 LT |
4090 | } |
4091 | ||
1da177e4 | 4092 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) |
4f70ecca | 4093 | __acquires(rcu_bh) |
1da177e4 | 4094 | { |
5c578aed | 4095 | rcu_read_lock_bh(); |
1d578303 | 4096 | return if6_get_first(seq, *pos); |
1da177e4 LT |
4097 | } |
4098 | ||
4099 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
4100 | { | |
4101 | struct inet6_ifaddr *ifa; | |
4102 | ||
4103 | ifa = if6_get_next(seq, v); | |
4104 | ++*pos; | |
4105 | return ifa; | |
4106 | } | |
4107 | ||
4108 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
4f70ecca | 4109 | __releases(rcu_bh) |
1da177e4 | 4110 | { |
5c578aed | 4111 | rcu_read_unlock_bh(); |
1da177e4 LT |
4112 | } |
4113 | ||
4114 | static int if6_seq_show(struct seq_file *seq, void *v) | |
4115 | { | |
4116 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
971a351c | 4117 | seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", |
b071195d | 4118 | &ifp->addr, |
1da177e4 LT |
4119 | ifp->idev->dev->ifindex, |
4120 | ifp->prefix_len, | |
4121 | ifp->scope, | |
971a351c | 4122 | (u8) ifp->flags, |
1da177e4 LT |
4123 | ifp->idev->dev->name); |
4124 | return 0; | |
4125 | } | |
4126 | ||
56b3d975 | 4127 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
4128 | .start = if6_seq_start, |
4129 | .next = if6_seq_next, | |
4130 | .show = if6_seq_show, | |
4131 | .stop = if6_seq_stop, | |
4132 | }; | |
4133 | ||
4134 | static int if6_seq_open(struct inode *inode, struct file *file) | |
4135 | { | |
3c40090a DL |
4136 | return seq_open_net(inode, file, &if6_seq_ops, |
4137 | sizeof(struct if6_iter_state)); | |
1da177e4 LT |
4138 | } |
4139 | ||
9a32144e | 4140 | static const struct file_operations if6_fops = { |
1da177e4 LT |
4141 | .owner = THIS_MODULE, |
4142 | .open = if6_seq_open, | |
4143 | .read = seq_read, | |
4144 | .llseek = seq_lseek, | |
3c40090a | 4145 | .release = seq_release_net, |
1da177e4 LT |
4146 | }; |
4147 | ||
2c8c1e72 | 4148 | static int __net_init if6_proc_net_init(struct net *net) |
1da177e4 | 4149 | { |
d4beaa66 | 4150 | if (!proc_create("if_inet6", S_IRUGO, net->proc_net, &if6_fops)) |
1da177e4 LT |
4151 | return -ENOMEM; |
4152 | return 0; | |
4153 | } | |
4154 | ||
2c8c1e72 | 4155 | static void __net_exit if6_proc_net_exit(struct net *net) |
3c40090a | 4156 | { |
ece31ffd | 4157 | remove_proc_entry("if_inet6", net->proc_net); |
3c40090a DL |
4158 | } |
4159 | ||
4160 | static struct pernet_operations if6_proc_net_ops = { | |
67ba4152 IM |
4161 | .init = if6_proc_net_init, |
4162 | .exit = if6_proc_net_exit, | |
3c40090a DL |
4163 | }; |
4164 | ||
4165 | int __init if6_proc_init(void) | |
4166 | { | |
4167 | return register_pernet_subsys(&if6_proc_net_ops); | |
4168 | } | |
4169 | ||
1da177e4 LT |
4170 | void if6_proc_exit(void) |
4171 | { | |
3c40090a | 4172 | unregister_pernet_subsys(&if6_proc_net_ops); |
1da177e4 LT |
4173 | } |
4174 | #endif /* CONFIG_PROC_FS */ | |
4175 | ||
07a93626 | 4176 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
3b9f9a1c | 4177 | /* Check if address is a home address configured on any interface. */ |
b71d1d42 | 4178 | int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr) |
3b9f9a1c NT |
4179 | { |
4180 | int ret = 0; | |
c2e21293 | 4181 | struct inet6_ifaddr *ifp = NULL; |
ddbe5032 | 4182 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 4183 | |
5c578aed | 4184 | rcu_read_lock_bh(); |
b67bfe0d | 4185 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 4186 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
389f6612 | 4187 | continue; |
caad295f | 4188 | if (ipv6_addr_equal(&ifp->addr, addr) && |
3b9f9a1c NT |
4189 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
4190 | ret = 1; | |
4191 | break; | |
4192 | } | |
4193 | } | |
5c578aed | 4194 | rcu_read_unlock_bh(); |
3b9f9a1c NT |
4195 | return ret; |
4196 | } | |
4197 | #endif | |
4198 | ||
1da177e4 LT |
4199 | /* |
4200 | * Periodic address status verification | |
4201 | */ | |
4202 | ||
c15b1cca | 4203 | static void addrconf_verify_rtnl(void) |
1da177e4 | 4204 | { |
b2db7564 | 4205 | unsigned long now, next, next_sec, next_sched; |
1da177e4 | 4206 | struct inet6_ifaddr *ifp; |
1da177e4 LT |
4207 | int i; |
4208 | ||
c15b1cca HFS |
4209 | ASSERT_RTNL(); |
4210 | ||
5c578aed | 4211 | rcu_read_lock_bh(); |
1da177e4 | 4212 | now = jiffies; |
b2db7564 | 4213 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); |
1da177e4 | 4214 | |
c15b1cca | 4215 | cancel_delayed_work(&addr_chk_work); |
1da177e4 | 4216 | |
bcdd553f | 4217 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
1da177e4 | 4218 | restart: |
c15b1cca | 4219 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[i], addr_lst) { |
1da177e4 | 4220 | unsigned long age; |
1da177e4 | 4221 | |
fad8da3e YA |
4222 | /* When setting preferred_lft to a value not zero or |
4223 | * infinity, while valid_lft is infinity | |
4224 | * IFA_F_PERMANENT has a non-infinity life time. | |
4225 | */ | |
4226 | if ((ifp->flags & IFA_F_PERMANENT) && | |
4227 | (ifp->prefered_lft == INFINITY_LIFE_TIME)) | |
1da177e4 LT |
4228 | continue; |
4229 | ||
4230 | spin_lock(&ifp->lock); | |
b2db7564 YH |
4231 | /* We try to batch several events at once. */ |
4232 | age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; | |
1da177e4 | 4233 | |
8f27ebb9 YH |
4234 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
4235 | age >= ifp->valid_lft) { | |
1da177e4 LT |
4236 | spin_unlock(&ifp->lock); |
4237 | in6_ifa_hold(ifp); | |
1da177e4 LT |
4238 | ipv6_del_addr(ifp); |
4239 | goto restart; | |
8f27ebb9 YH |
4240 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
4241 | spin_unlock(&ifp->lock); | |
4242 | continue; | |
1da177e4 | 4243 | } else if (age >= ifp->prefered_lft) { |
a1ed0526 | 4244 | /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ |
1da177e4 LT |
4245 | int deprecate = 0; |
4246 | ||
4247 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
4248 | deprecate = 1; | |
4249 | ifp->flags |= IFA_F_DEPRECATED; | |
4250 | } | |
4251 | ||
fad8da3e YA |
4252 | if ((ifp->valid_lft != INFINITY_LIFE_TIME) && |
4253 | (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))) | |
1da177e4 LT |
4254 | next = ifp->tstamp + ifp->valid_lft * HZ; |
4255 | ||
4256 | spin_unlock(&ifp->lock); | |
4257 | ||
4258 | if (deprecate) { | |
4259 | in6_ifa_hold(ifp); | |
1da177e4 LT |
4260 | |
4261 | ipv6_ifa_notify(0, ifp); | |
4262 | in6_ifa_put(ifp); | |
4263 | goto restart; | |
4264 | } | |
1da177e4 LT |
4265 | } else if ((ifp->flags&IFA_F_TEMPORARY) && |
4266 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
88949cf4 | 4267 | unsigned long regen_advance = ifp->idev->cnf.regen_max_retry * |
4268 | ifp->idev->cnf.dad_transmits * | |
1f9248e5 | 4269 | NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME) / HZ; |
88949cf4 | 4270 | |
1da177e4 LT |
4271 | if (age >= ifp->prefered_lft - regen_advance) { |
4272 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
4273 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
4274 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
4275 | if (!ifp->regen_count && ifpub) { | |
4276 | ifp->regen_count++; | |
4277 | in6_ifa_hold(ifp); | |
4278 | in6_ifa_hold(ifpub); | |
4279 | spin_unlock(&ifp->lock); | |
5c578aed | 4280 | |
291d809b HY |
4281 | spin_lock(&ifpub->lock); |
4282 | ifpub->regen_count = 0; | |
4283 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
4284 | ipv6_create_tempaddr(ifpub, ifp); |
4285 | in6_ifa_put(ifpub); | |
4286 | in6_ifa_put(ifp); | |
4287 | goto restart; | |
4288 | } | |
4289 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
4290 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
4291 | spin_unlock(&ifp->lock); | |
1da177e4 LT |
4292 | } else { |
4293 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
4294 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
4295 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
4296 | spin_unlock(&ifp->lock); | |
4297 | } | |
4298 | } | |
1da177e4 LT |
4299 | } |
4300 | ||
b2db7564 YH |
4301 | next_sec = round_jiffies_up(next); |
4302 | next_sched = next; | |
4303 | ||
4304 | /* If rounded timeout is accurate enough, accept it. */ | |
4305 | if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) | |
4306 | next_sched = next_sec; | |
4307 | ||
4308 | /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ | |
4309 | if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX)) | |
4310 | next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX; | |
4311 | ||
ba3542e1 | 4312 | ADBG(KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n", |
4313 | now, next, next_sec, next_sched); | |
c15b1cca | 4314 | mod_delayed_work(addrconf_wq, &addr_chk_work, next_sched - now); |
5c578aed | 4315 | rcu_read_unlock_bh(); |
1da177e4 LT |
4316 | } |
4317 | ||
c15b1cca HFS |
4318 | static void addrconf_verify_work(struct work_struct *w) |
4319 | { | |
4320 | rtnl_lock(); | |
4321 | addrconf_verify_rtnl(); | |
4322 | rtnl_unlock(); | |
4323 | } | |
4324 | ||
4325 | static void addrconf_verify(void) | |
4326 | { | |
4327 | mod_delayed_work(addrconf_wq, &addr_chk_work, 0); | |
4328 | } | |
4329 | ||
caeaba79 ND |
4330 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local, |
4331 | struct in6_addr **peer_pfx) | |
461d8837 TG |
4332 | { |
4333 | struct in6_addr *pfx = NULL; | |
4334 | ||
caeaba79 ND |
4335 | *peer_pfx = NULL; |
4336 | ||
461d8837 TG |
4337 | if (addr) |
4338 | pfx = nla_data(addr); | |
4339 | ||
4340 | if (local) { | |
4341 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
caeaba79 ND |
4342 | *peer_pfx = pfx; |
4343 | pfx = nla_data(local); | |
461d8837 TG |
4344 | } |
4345 | ||
4346 | return pfx; | |
4347 | } | |
4348 | ||
ef7c79ed | 4349 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
4350 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
4351 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
4352 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
479840ff | 4353 | [IFA_FLAGS] = { .len = sizeof(u32) }, |
461d8837 TG |
4354 | }; |
4355 | ||
1da177e4 | 4356 | static int |
661d2967 | 4357 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 4358 | { |
3b1e0a65 | 4359 | struct net *net = sock_net(skb->sk); |
b933f716 TG |
4360 | struct ifaddrmsg *ifm; |
4361 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 4362 | struct in6_addr *pfx, *peer_pfx; |
6046d5b4 | 4363 | u32 ifa_flags; |
b933f716 | 4364 | int err; |
1da177e4 | 4365 | |
b933f716 TG |
4366 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
4367 | if (err < 0) | |
4368 | return err; | |
4369 | ||
4370 | ifm = nlmsg_data(nlh); | |
caeaba79 | 4371 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
63159f29 | 4372 | if (!pfx) |
1da177e4 LT |
4373 | return -EINVAL; |
4374 | ||
6046d5b4 HK |
4375 | ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags; |
4376 | ||
4377 | /* We ignore other flags so far. */ | |
4378 | ifa_flags &= IFA_F_MANAGETEMPADDR; | |
4379 | ||
4380 | return inet6_addr_del(net, ifm->ifa_index, ifa_flags, pfx, | |
4381 | ifm->ifa_prefixlen); | |
1da177e4 LT |
4382 | } |
4383 | ||
479840ff | 4384 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u32 ifa_flags, |
55ebaef1 | 4385 | u32 prefered_lft, u32 valid_lft) |
081bba5b | 4386 | { |
6f704992 YH |
4387 | u32 flags; |
4388 | clock_t expires; | |
4bed72e4 | 4389 | unsigned long timeout; |
53bd6749 | 4390 | bool was_managetempaddr; |
5b84efec | 4391 | bool had_prefixroute; |
46d48046 | 4392 | |
c15b1cca HFS |
4393 | ASSERT_RTNL(); |
4394 | ||
081bba5b NT |
4395 | if (!valid_lft || (prefered_lft > valid_lft)) |
4396 | return -EINVAL; | |
4397 | ||
53bd6749 JP |
4398 | if (ifa_flags & IFA_F_MANAGETEMPADDR && |
4399 | (ifp->flags & IFA_F_TEMPORARY || ifp->prefix_len != 64)) | |
4400 | return -EINVAL; | |
4401 | ||
4bed72e4 YH |
4402 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
4403 | if (addrconf_finite_timeout(timeout)) { | |
4404 | expires = jiffies_to_clock_t(timeout * HZ); | |
4405 | valid_lft = timeout; | |
6f704992 | 4406 | flags = RTF_EXPIRES; |
4bed72e4 YH |
4407 | } else { |
4408 | expires = 0; | |
4409 | flags = 0; | |
4410 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 4411 | } |
081bba5b | 4412 | |
4bed72e4 YH |
4413 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
4414 | if (addrconf_finite_timeout(timeout)) { | |
4415 | if (timeout == 0) | |
4416 | ifa_flags |= IFA_F_DEPRECATED; | |
4417 | prefered_lft = timeout; | |
4418 | } | |
081bba5b NT |
4419 | |
4420 | spin_lock_bh(&ifp->lock); | |
53bd6749 | 4421 | was_managetempaddr = ifp->flags & IFA_F_MANAGETEMPADDR; |
5b84efec TH |
4422 | had_prefixroute = ifp->flags & IFA_F_PERMANENT && |
4423 | !(ifp->flags & IFA_F_NOPREFIXROUTE); | |
53bd6749 | 4424 | ifp->flags &= ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | |
761aac73 TH |
4425 | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR | |
4426 | IFA_F_NOPREFIXROUTE); | |
53bd6749 | 4427 | ifp->flags |= ifa_flags; |
081bba5b NT |
4428 | ifp->tstamp = jiffies; |
4429 | ifp->valid_lft = valid_lft; | |
4430 | ifp->prefered_lft = prefered_lft; | |
4431 | ||
4432 | spin_unlock_bh(&ifp->lock); | |
4433 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
4434 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 4435 | |
761aac73 TH |
4436 | if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) { |
4437 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, | |
4438 | expires, flags); | |
5b84efec TH |
4439 | } else if (had_prefixroute) { |
4440 | enum cleanup_prefix_rt_t action; | |
4441 | unsigned long rt_expires; | |
4442 | ||
4443 | write_lock_bh(&ifp->idev->lock); | |
4444 | action = check_cleanup_prefix_route(ifp, &rt_expires); | |
4445 | write_unlock_bh(&ifp->idev->lock); | |
4446 | ||
4447 | if (action != CLEANUP_PREFIX_RT_NOP) { | |
4448 | cleanup_prefix_route(ifp, rt_expires, | |
4449 | action == CLEANUP_PREFIX_RT_DEL); | |
4450 | } | |
761aac73 | 4451 | } |
53bd6749 JP |
4452 | |
4453 | if (was_managetempaddr || ifp->flags & IFA_F_MANAGETEMPADDR) { | |
4454 | if (was_managetempaddr && !(ifp->flags & IFA_F_MANAGETEMPADDR)) | |
4455 | valid_lft = prefered_lft = 0; | |
4456 | manage_tempaddrs(ifp->idev, ifp, valid_lft, prefered_lft, | |
4457 | !was_managetempaddr, jiffies); | |
4458 | } | |
4459 | ||
c15b1cca | 4460 | addrconf_verify_rtnl(); |
081bba5b NT |
4461 | |
4462 | return 0; | |
4463 | } | |
4464 | ||
1da177e4 | 4465 | static int |
661d2967 | 4466 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 4467 | { |
3b1e0a65 | 4468 | struct net *net = sock_net(skb->sk); |
461d8837 TG |
4469 | struct ifaddrmsg *ifm; |
4470 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 4471 | struct in6_addr *pfx, *peer_pfx; |
7198f8ce TG |
4472 | struct inet6_ifaddr *ifa; |
4473 | struct net_device *dev; | |
55ebaef1 | 4474 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
479840ff | 4475 | u32 ifa_flags; |
461d8837 | 4476 | int err; |
1da177e4 | 4477 | |
461d8837 TG |
4478 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
4479 | if (err < 0) | |
4480 | return err; | |
4481 | ||
4482 | ifm = nlmsg_data(nlh); | |
caeaba79 | 4483 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
63159f29 | 4484 | if (!pfx) |
1da177e4 LT |
4485 | return -EINVAL; |
4486 | ||
461d8837 | 4487 | if (tb[IFA_CACHEINFO]) { |
0778769d | 4488 | struct ifa_cacheinfo *ci; |
461d8837 TG |
4489 | |
4490 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 4491 | valid_lft = ci->ifa_valid; |
461d8837 TG |
4492 | preferred_lft = ci->ifa_prefered; |
4493 | } else { | |
4494 | preferred_lft = INFINITY_LIFE_TIME; | |
4495 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
4496 | } |
4497 | ||
af284937 | 4498 | dev = __dev_get_by_index(net, ifm->ifa_index); |
63159f29 | 4499 | if (!dev) |
7198f8ce TG |
4500 | return -ENODEV; |
4501 | ||
479840ff JP |
4502 | ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags; |
4503 | ||
55ebaef1 | 4504 | /* We ignore other flags so far. */ |
761aac73 | 4505 | ifa_flags &= IFA_F_NODAD | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR | |
93a714d6 | 4506 | IFA_F_NOPREFIXROUTE | IFA_F_MCAUTOJOIN; |
55ebaef1 | 4507 | |
1cab3da6 | 4508 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
63159f29 | 4509 | if (!ifa) { |
7198f8ce TG |
4510 | /* |
4511 | * It would be best to check for !NLM_F_CREATE here but | |
db9c7c39 | 4512 | * userspace already relies on not having to provide this. |
7198f8ce | 4513 | */ |
caeaba79 | 4514 | return inet6_addr_add(net, ifm->ifa_index, pfx, peer_pfx, |
af284937 DL |
4515 | ifm->ifa_prefixlen, ifa_flags, |
4516 | preferred_lft, valid_lft); | |
081bba5b NT |
4517 | } |
4518 | ||
7198f8ce TG |
4519 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
4520 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
4521 | err = -EEXIST; | |
4522 | else | |
55ebaef1 | 4523 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
4524 | |
4525 | in6_ifa_put(ifa); | |
4526 | ||
4527 | return err; | |
1da177e4 LT |
4528 | } |
4529 | ||
479840ff | 4530 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u32 flags, |
101bb229 TG |
4531 | u8 scope, int ifindex) |
4532 | { | |
4533 | struct ifaddrmsg *ifm; | |
4534 | ||
4535 | ifm = nlmsg_data(nlh); | |
4536 | ifm->ifa_family = AF_INET6; | |
4537 | ifm->ifa_prefixlen = prefixlen; | |
4538 | ifm->ifa_flags = flags; | |
4539 | ifm->ifa_scope = scope; | |
4540 | ifm->ifa_index = ifindex; | |
4541 | } | |
4542 | ||
85486af0 TG |
4543 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
4544 | unsigned long tstamp, u32 preferred, u32 valid) | |
4545 | { | |
4546 | struct ifa_cacheinfo ci; | |
4547 | ||
18a31e1e TG |
4548 | ci.cstamp = cstamp_delta(cstamp); |
4549 | ci.tstamp = cstamp_delta(tstamp); | |
85486af0 TG |
4550 | ci.ifa_prefered = preferred; |
4551 | ci.ifa_valid = valid; | |
4552 | ||
4553 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
4554 | } | |
4555 | ||
101bb229 TG |
4556 | static inline int rt_scope(int ifa_scope) |
4557 | { | |
4558 | if (ifa_scope & IFA_HOST) | |
4559 | return RT_SCOPE_HOST; | |
4560 | else if (ifa_scope & IFA_LINK) | |
4561 | return RT_SCOPE_LINK; | |
4562 | else if (ifa_scope & IFA_SITE) | |
4563 | return RT_SCOPE_SITE; | |
4564 | else | |
4565 | return RT_SCOPE_UNIVERSE; | |
4566 | } | |
4567 | ||
0ab6803b TG |
4568 | static inline int inet6_ifaddr_msgsize(void) |
4569 | { | |
339bf98f | 4570 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
caeaba79 | 4571 | + nla_total_size(16) /* IFA_LOCAL */ |
339bf98f | 4572 | + nla_total_size(16) /* IFA_ADDRESS */ |
479840ff JP |
4573 | + nla_total_size(sizeof(struct ifa_cacheinfo)) |
4574 | + nla_total_size(4) /* IFA_FLAGS */; | |
0ab6803b | 4575 | } |
c5396a31 | 4576 | |
1da177e4 | 4577 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
15e47304 | 4578 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4579 | { |
1da177e4 | 4580 | struct nlmsghdr *nlh; |
85486af0 | 4581 | u32 preferred, valid; |
1da177e4 | 4582 | |
15e47304 | 4583 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
63159f29 | 4584 | if (!nlh) |
26932566 | 4585 | return -EMSGSIZE; |
0ab6803b | 4586 | |
101bb229 TG |
4587 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
4588 | ifa->idev->dev->ifindex); | |
4589 | ||
fad8da3e YA |
4590 | if (!((ifa->flags&IFA_F_PERMANENT) && |
4591 | (ifa->prefered_lft == INFINITY_LIFE_TIME))) { | |
85486af0 TG |
4592 | preferred = ifa->prefered_lft; |
4593 | valid = ifa->valid_lft; | |
4594 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 4595 | long tval = (jiffies - ifa->tstamp)/HZ; |
a1faa698 JR |
4596 | if (preferred > tval) |
4597 | preferred -= tval; | |
4598 | else | |
4599 | preferred = 0; | |
f56619fc BH |
4600 | if (valid != INFINITY_LIFE_TIME) { |
4601 | if (valid > tval) | |
4602 | valid -= tval; | |
4603 | else | |
4604 | valid = 0; | |
4605 | } | |
1da177e4 LT |
4606 | } |
4607 | } else { | |
85486af0 TG |
4608 | preferred = INFINITY_LIFE_TIME; |
4609 | valid = INFINITY_LIFE_TIME; | |
4610 | } | |
4611 | ||
7996c799 | 4612 | if (!ipv6_addr_any(&ifa->peer_addr)) { |
930345ea JB |
4613 | if (nla_put_in6_addr(skb, IFA_LOCAL, &ifa->addr) < 0 || |
4614 | nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->peer_addr) < 0) | |
caeaba79 ND |
4615 | goto error; |
4616 | } else | |
930345ea | 4617 | if (nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->addr) < 0) |
caeaba79 ND |
4618 | goto error; |
4619 | ||
4620 | if (put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) | |
4621 | goto error; | |
1da177e4 | 4622 | |
479840ff JP |
4623 | if (nla_put_u32(skb, IFA_FLAGS, ifa->flags) < 0) |
4624 | goto error; | |
4625 | ||
053c095a JB |
4626 | nlmsg_end(skb, nlh); |
4627 | return 0; | |
caeaba79 ND |
4628 | |
4629 | error: | |
4630 | nlmsg_cancel(skb, nlh); | |
4631 | return -EMSGSIZE; | |
1da177e4 LT |
4632 | } |
4633 | ||
4634 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
15e47304 | 4635 | u32 portid, u32 seq, int event, u16 flags) |
1da177e4 | 4636 | { |
1da177e4 | 4637 | struct nlmsghdr *nlh; |
101bb229 TG |
4638 | u8 scope = RT_SCOPE_UNIVERSE; |
4639 | int ifindex = ifmca->idev->dev->ifindex; | |
4640 | ||
4641 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
4642 | scope = RT_SCOPE_SITE; | |
1da177e4 | 4643 | |
15e47304 | 4644 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
63159f29 | 4645 | if (!nlh) |
26932566 | 4646 | return -EMSGSIZE; |
85486af0 | 4647 | |
0ab6803b | 4648 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
930345ea | 4649 | if (nla_put_in6_addr(skb, IFA_MULTICAST, &ifmca->mca_addr) < 0 || |
0ab6803b | 4650 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, |
26932566 PM |
4651 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
4652 | nlmsg_cancel(skb, nlh); | |
4653 | return -EMSGSIZE; | |
4654 | } | |
85486af0 | 4655 | |
053c095a JB |
4656 | nlmsg_end(skb, nlh); |
4657 | return 0; | |
1da177e4 LT |
4658 | } |
4659 | ||
4660 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
15e47304 | 4661 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4662 | { |
1da177e4 | 4663 | struct nlmsghdr *nlh; |
101bb229 TG |
4664 | u8 scope = RT_SCOPE_UNIVERSE; |
4665 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
4666 | ||
4667 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
4668 | scope = RT_SCOPE_SITE; | |
1da177e4 | 4669 | |
15e47304 | 4670 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
63159f29 | 4671 | if (!nlh) |
26932566 | 4672 | return -EMSGSIZE; |
85486af0 | 4673 | |
0ab6803b | 4674 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
930345ea | 4675 | if (nla_put_in6_addr(skb, IFA_ANYCAST, &ifaca->aca_addr) < 0 || |
0ab6803b | 4676 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, |
26932566 PM |
4677 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
4678 | nlmsg_cancel(skb, nlh); | |
4679 | return -EMSGSIZE; | |
4680 | } | |
1da177e4 | 4681 | |
053c095a JB |
4682 | nlmsg_end(skb, nlh); |
4683 | return 0; | |
1da177e4 LT |
4684 | } |
4685 | ||
e21e8467 | 4686 | enum addr_type_t { |
1da177e4 LT |
4687 | UNICAST_ADDR, |
4688 | MULTICAST_ADDR, | |
4689 | ANYCAST_ADDR, | |
4690 | }; | |
4691 | ||
234b27c3 ED |
4692 | /* called with rcu_read_lock() */ |
4693 | static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb, | |
4694 | struct netlink_callback *cb, enum addr_type_t type, | |
4695 | int s_ip_idx, int *p_ip_idx) | |
4696 | { | |
234b27c3 ED |
4697 | struct ifmcaddr6 *ifmca; |
4698 | struct ifacaddr6 *ifaca; | |
4699 | int err = 1; | |
4700 | int ip_idx = *p_ip_idx; | |
4701 | ||
4702 | read_lock_bh(&idev->lock); | |
4703 | switch (type) { | |
502a2ffd | 4704 | case UNICAST_ADDR: { |
4705 | struct inet6_ifaddr *ifa; | |
4706 | ||
234b27c3 | 4707 | /* unicast address incl. temp addr */ |
502a2ffd | 4708 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
4709 | if (++ip_idx < s_ip_idx) | |
234b27c3 ED |
4710 | continue; |
4711 | err = inet6_fill_ifaddr(skb, ifa, | |
15e47304 | 4712 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4713 | cb->nlh->nlmsg_seq, |
4714 | RTM_NEWADDR, | |
4715 | NLM_F_MULTI); | |
053c095a | 4716 | if (err < 0) |
234b27c3 | 4717 | break; |
63998ac2 | 4718 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
234b27c3 ED |
4719 | } |
4720 | break; | |
502a2ffd | 4721 | } |
234b27c3 ED |
4722 | case MULTICAST_ADDR: |
4723 | /* multicast address */ | |
4724 | for (ifmca = idev->mc_list; ifmca; | |
4725 | ifmca = ifmca->next, ip_idx++) { | |
4726 | if (ip_idx < s_ip_idx) | |
4727 | continue; | |
4728 | err = inet6_fill_ifmcaddr(skb, ifmca, | |
15e47304 | 4729 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4730 | cb->nlh->nlmsg_seq, |
4731 | RTM_GETMULTICAST, | |
4732 | NLM_F_MULTI); | |
053c095a | 4733 | if (err < 0) |
234b27c3 ED |
4734 | break; |
4735 | } | |
4736 | break; | |
4737 | case ANYCAST_ADDR: | |
4738 | /* anycast address */ | |
4739 | for (ifaca = idev->ac_list; ifaca; | |
4740 | ifaca = ifaca->aca_next, ip_idx++) { | |
4741 | if (ip_idx < s_ip_idx) | |
4742 | continue; | |
4743 | err = inet6_fill_ifacaddr(skb, ifaca, | |
15e47304 | 4744 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4745 | cb->nlh->nlmsg_seq, |
4746 | RTM_GETANYCAST, | |
4747 | NLM_F_MULTI); | |
053c095a | 4748 | if (err < 0) |
234b27c3 ED |
4749 | break; |
4750 | } | |
4751 | break; | |
4752 | default: | |
4753 | break; | |
4754 | } | |
4755 | read_unlock_bh(&idev->lock); | |
4756 | *p_ip_idx = ip_idx; | |
4757 | return err; | |
4758 | } | |
4759 | ||
1da177e4 LT |
4760 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, |
4761 | enum addr_type_t type) | |
4762 | { | |
234b27c3 ED |
4763 | struct net *net = sock_net(skb->sk); |
4764 | int h, s_h; | |
1da177e4 LT |
4765 | int idx, ip_idx; |
4766 | int s_idx, s_ip_idx; | |
1da177e4 | 4767 | struct net_device *dev; |
234b27c3 ED |
4768 | struct inet6_dev *idev; |
4769 | struct hlist_head *head; | |
1ab1457c | 4770 | |
234b27c3 ED |
4771 | s_h = cb->args[0]; |
4772 | s_idx = idx = cb->args[1]; | |
4773 | s_ip_idx = ip_idx = cb->args[2]; | |
5d5619b4 | 4774 | |
234b27c3 | 4775 | rcu_read_lock(); |
63998ac2 | 4776 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ net->dev_base_seq; |
234b27c3 ED |
4777 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
4778 | idx = 0; | |
4779 | head = &net->dev_index_head[h]; | |
b67bfe0d | 4780 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
234b27c3 ED |
4781 | if (idx < s_idx) |
4782 | goto cont; | |
4b97efdf | 4783 | if (h > s_h || idx > s_idx) |
234b27c3 ED |
4784 | s_ip_idx = 0; |
4785 | ip_idx = 0; | |
e21e8467 SH |
4786 | idev = __in6_dev_get(dev); |
4787 | if (!idev) | |
234b27c3 ED |
4788 | goto cont; |
4789 | ||
4790 | if (in6_dump_addrs(idev, skb, cb, type, | |
7b46a644 | 4791 | s_ip_idx, &ip_idx) < 0) |
234b27c3 | 4792 | goto done; |
7562f876 | 4793 | cont: |
234b27c3 ED |
4794 | idx++; |
4795 | } | |
1da177e4 | 4796 | } |
234b27c3 ED |
4797 | done: |
4798 | rcu_read_unlock(); | |
4799 | cb->args[0] = h; | |
4800 | cb->args[1] = idx; | |
4801 | cb->args[2] = ip_idx; | |
4802 | ||
1da177e4 LT |
4803 | return skb->len; |
4804 | } | |
4805 | ||
4806 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4807 | { | |
4808 | enum addr_type_t type = UNICAST_ADDR; | |
b854272b | 4809 | |
1da177e4 LT |
4810 | return inet6_dump_addr(skb, cb, type); |
4811 | } | |
4812 | ||
4813 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4814 | { | |
4815 | enum addr_type_t type = MULTICAST_ADDR; | |
b854272b | 4816 | |
1da177e4 LT |
4817 | return inet6_dump_addr(skb, cb, type); |
4818 | } | |
4819 | ||
4820 | ||
4821 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4822 | { | |
4823 | enum addr_type_t type = ANYCAST_ADDR; | |
b854272b | 4824 | |
1da177e4 LT |
4825 | return inet6_dump_addr(skb, cb, type); |
4826 | } | |
4827 | ||
661d2967 | 4828 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh) |
6c223828 | 4829 | { |
3b1e0a65 | 4830 | struct net *net = sock_net(in_skb->sk); |
1b29fc2c TG |
4831 | struct ifaddrmsg *ifm; |
4832 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 4833 | struct in6_addr *addr = NULL, *peer; |
6c223828 NT |
4834 | struct net_device *dev = NULL; |
4835 | struct inet6_ifaddr *ifa; | |
4836 | struct sk_buff *skb; | |
6c223828 NT |
4837 | int err; |
4838 | ||
1b29fc2c TG |
4839 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
4840 | if (err < 0) | |
4841 | goto errout; | |
4842 | ||
caeaba79 | 4843 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer); |
63159f29 | 4844 | if (!addr) { |
1b29fc2c TG |
4845 | err = -EINVAL; |
4846 | goto errout; | |
6c223828 | 4847 | } |
6c223828 | 4848 | |
1b29fc2c | 4849 | ifm = nlmsg_data(nlh); |
6c223828 | 4850 | if (ifm->ifa_index) |
6fda7350 | 4851 | dev = __dev_get_by_index(net, ifm->ifa_index); |
6c223828 | 4852 | |
e21e8467 SH |
4853 | ifa = ipv6_get_ifaddr(net, addr, dev, 1); |
4854 | if (!ifa) { | |
1b29fc2c TG |
4855 | err = -EADDRNOTAVAIL; |
4856 | goto errout; | |
4857 | } | |
6c223828 | 4858 | |
e21e8467 SH |
4859 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL); |
4860 | if (!skb) { | |
6c223828 | 4861 | err = -ENOBUFS; |
1b29fc2c | 4862 | goto errout_ifa; |
6c223828 NT |
4863 | } |
4864 | ||
15e47304 | 4865 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).portid, |
6c223828 | 4866 | nlh->nlmsg_seq, RTM_NEWADDR, 0); |
26932566 PM |
4867 | if (err < 0) { |
4868 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
4869 | WARN_ON(err == -EMSGSIZE); | |
4870 | kfree_skb(skb); | |
4871 | goto errout_ifa; | |
4872 | } | |
15e47304 | 4873 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); |
1b29fc2c | 4874 | errout_ifa: |
6c223828 | 4875 | in6_ifa_put(ifa); |
1b29fc2c | 4876 | errout: |
6c223828 | 4877 | return err; |
6c223828 NT |
4878 | } |
4879 | ||
1da177e4 LT |
4880 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
4881 | { | |
4882 | struct sk_buff *skb; | |
c346dca1 | 4883 | struct net *net = dev_net(ifa->idev->dev); |
5d620266 | 4884 | int err = -ENOBUFS; |
1da177e4 | 4885 | |
0ab6803b | 4886 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
63159f29 | 4887 | if (!skb) |
5d620266 TG |
4888 | goto errout; |
4889 | ||
4890 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
4891 | if (err < 0) { |
4892 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
4893 | WARN_ON(err == -EMSGSIZE); | |
4894 | kfree_skb(skb); | |
4895 | goto errout; | |
4896 | } | |
1ce85fe4 PNA |
4897 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
4898 | return; | |
5d620266 TG |
4899 | errout: |
4900 | if (err < 0) | |
6fda7350 | 4901 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
4902 | } |
4903 | ||
b6f99a21 | 4904 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
4905 | __s32 *array, int bytes) |
4906 | { | |
04561c1f TG |
4907 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
4908 | ||
1da177e4 LT |
4909 | memset(array, 0, bytes); |
4910 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
4911 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
4912 | array[DEVCONF_MTU6] = cnf->mtu6; | |
4913 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
4914 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
4915 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
4916 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
4917 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
93908d19 TG |
4918 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = |
4919 | jiffies_to_msecs(cnf->rtr_solicit_interval); | |
bd11f074 MŻ |
4920 | array[DEVCONF_RTR_SOLICIT_MAX_INTERVAL] = |
4921 | jiffies_to_msecs(cnf->rtr_solicit_max_interval); | |
93908d19 TG |
4922 | array[DEVCONF_RTR_SOLICIT_DELAY] = |
4923 | jiffies_to_msecs(cnf->rtr_solicit_delay); | |
1da177e4 | 4924 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; |
fc4eba58 HFS |
4925 | array[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL] = |
4926 | jiffies_to_msecs(cnf->mldv1_unsolicited_report_interval); | |
4927 | array[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL] = | |
4928 | jiffies_to_msecs(cnf->mldv2_unsolicited_report_interval); | |
1da177e4 LT |
4929 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; |
4930 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
4931 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
4932 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
4933 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
1da177e4 | 4934 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; |
65f5c7c1 | 4935 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
8013d1d7 | 4936 | array[DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT] = cnf->accept_ra_min_hop_limit; |
c4fd30eb | 4937 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
4938 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4939 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
93908d19 TG |
4940 | array[DEVCONF_RTR_PROBE_INTERVAL] = |
4941 | jiffies_to_msecs(cnf->rtr_probe_interval); | |
fa03ef38 | 4942 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
4943 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
4944 | #endif | |
930d6ff2 | 4945 | #endif |
fbea49e1 | 4946 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 4947 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
4948 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4949 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
7fd2561e | 4950 | array[DEVCONF_USE_OPTIMISTIC] = cnf->use_optimistic; |
95c385b4 | 4951 | #endif |
7bc570c8 YH |
4952 | #ifdef CONFIG_IPV6_MROUTE |
4953 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; | |
4954 | #endif | |
778d80be | 4955 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
1b34be74 | 4956 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
c3faca05 | 4957 | array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao; |
5cb04436 | 4958 | array[DEVCONF_NDISC_NOTIFY] = cnf->ndisc_notify; |
b800c3b9 | 4959 | array[DEVCONF_SUPPRESS_FRAG_NDISC] = cnf->suppress_frag_ndisc; |
d9333196 | 4960 | array[DEVCONF_ACCEPT_RA_FROM_LOCAL] = cnf->accept_ra_from_local; |
c2943f14 | 4961 | array[DEVCONF_ACCEPT_RA_MTU] = cnf->accept_ra_mtu; |
35103d11 | 4962 | array[DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN] = cnf->ignore_routes_with_linkdown; |
3d1bec99 | 4963 | /* we omit DEVCONF_STABLE_SECRET for now */ |
3985e8a3 | 4964 | array[DEVCONF_USE_OIF_ADDRS_ONLY] = cnf->use_oif_addrs_only; |
abbc3043 | 4965 | array[DEVCONF_DROP_UNICAST_IN_L2_MULTICAST] = cnf->drop_unicast_in_l2_multicast; |
7a02bf89 | 4966 | array[DEVCONF_DROP_UNSOLICITED_NA] = cnf->drop_unsolicited_na; |
f1705ec1 | 4967 | array[DEVCONF_KEEP_ADDR_ON_DOWN] = cnf->keep_addr_on_down; |
1da177e4 LT |
4968 | } |
4969 | ||
b382b191 TG |
4970 | static inline size_t inet6_ifla6_size(void) |
4971 | { | |
4972 | return nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
4973 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
4974 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
4975 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ | |
f53adae4 DB |
4976 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ |
4977 | + nla_total_size(sizeof(struct in6_addr)); /* IFLA_INET6_TOKEN */ | |
b382b191 TG |
4978 | } |
4979 | ||
339bf98f TG |
4980 | static inline size_t inet6_if_nlmsg_size(void) |
4981 | { | |
4982 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
4983 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
4984 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
4985 | + nla_total_size(4) /* IFLA_MTU */ | |
4986 | + nla_total_size(4) /* IFLA_LINK */ | |
0344338b | 4987 | + nla_total_size(1) /* IFLA_OPERSTATE */ |
b382b191 | 4988 | + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */ |
339bf98f | 4989 | } |
c5396a31 | 4990 | |
be281e55 | 4991 | static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib, |
aca05671 | 4992 | int bytes) |
7f7d9a6b HX |
4993 | { |
4994 | int i; | |
aca05671 | 4995 | int pad = bytes - sizeof(u64) * ICMP6_MIB_MAX; |
7f7d9a6b HX |
4996 | BUG_ON(pad < 0); |
4997 | ||
4998 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
aca05671 JH |
4999 | put_unaligned(ICMP6_MIB_MAX, &stats[0]); |
5000 | for (i = 1; i < ICMP6_MIB_MAX; i++) | |
be281e55 | 5001 | put_unaligned(atomic_long_read(&mib[i]), &stats[i]); |
7f7d9a6b | 5002 | |
aca05671 | 5003 | memset(&stats[ICMP6_MIB_MAX], 0, pad); |
7f7d9a6b HX |
5004 | } |
5005 | ||
698365fa | 5006 | static inline void __snmp6_fill_stats64(u64 *stats, void __percpu *mib, |
a3a77372 | 5007 | int bytes, size_t syncpoff) |
4ce3c183 | 5008 | { |
a3a77372 R |
5009 | int i, c; |
5010 | u64 buff[IPSTATS_MIB_MAX]; | |
5011 | int pad = bytes - sizeof(u64) * IPSTATS_MIB_MAX; | |
5012 | ||
4ce3c183 ED |
5013 | BUG_ON(pad < 0); |
5014 | ||
a3a77372 R |
5015 | memset(buff, 0, sizeof(buff)); |
5016 | buff[0] = IPSTATS_MIB_MAX; | |
4ce3c183 | 5017 | |
a3a77372 R |
5018 | for_each_possible_cpu(c) { |
5019 | for (i = 1; i < IPSTATS_MIB_MAX; i++) | |
5020 | buff[i] += snmp_get_cpu_field64(mib, c, i, syncpoff); | |
5021 | } | |
5022 | ||
5023 | memcpy(stats, buff, IPSTATS_MIB_MAX * sizeof(u64)); | |
5024 | memset(&stats[IPSTATS_MIB_MAX], 0, pad); | |
4ce3c183 ED |
5025 | } |
5026 | ||
7f7d9a6b HX |
5027 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, |
5028 | int bytes) | |
5029 | { | |
e21e8467 | 5030 | switch (attrtype) { |
7f7d9a6b | 5031 | case IFLA_INET6_STATS: |
a3a77372 R |
5032 | __snmp6_fill_stats64(stats, idev->stats.ipv6, bytes, |
5033 | offsetof(struct ipstats_mib, syncp)); | |
7f7d9a6b HX |
5034 | break; |
5035 | case IFLA_INET6_ICMP6STATS: | |
aca05671 | 5036 | __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, bytes); |
7f7d9a6b HX |
5037 | break; |
5038 | } | |
5039 | } | |
5040 | ||
d5566fd7 SV |
5041 | static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev, |
5042 | u32 ext_filter_mask) | |
b382b191 TG |
5043 | { |
5044 | struct nlattr *nla; | |
5045 | struct ifla_cacheinfo ci; | |
5046 | ||
c78679e8 DM |
5047 | if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags)) |
5048 | goto nla_put_failure; | |
b382b191 | 5049 | ci.max_reasm_len = IPV6_MAXPLEN; |
24912420 DM |
5050 | ci.tstamp = cstamp_delta(idev->tstamp); |
5051 | ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time); | |
1f9248e5 | 5052 | ci.retrans_time = jiffies_to_msecs(NEIGH_VAR(idev->nd_parms, RETRANS_TIME)); |
c78679e8 DM |
5053 | if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci)) |
5054 | goto nla_put_failure; | |
b382b191 | 5055 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
63159f29 | 5056 | if (!nla) |
b382b191 TG |
5057 | goto nla_put_failure; |
5058 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); | |
5059 | ||
5060 | /* XXX - MC not implemented */ | |
5061 | ||
d5566fd7 SV |
5062 | if (ext_filter_mask & RTEXT_FILTER_SKIP_STATS) |
5063 | return 0; | |
5064 | ||
b382b191 | 5065 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); |
63159f29 | 5066 | if (!nla) |
b382b191 TG |
5067 | goto nla_put_failure; |
5068 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
5069 | ||
5070 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
63159f29 | 5071 | if (!nla) |
b382b191 TG |
5072 | goto nla_put_failure; |
5073 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
5074 | ||
f53adae4 | 5075 | nla = nla_reserve(skb, IFLA_INET6_TOKEN, sizeof(struct in6_addr)); |
63159f29 | 5076 | if (!nla) |
f53adae4 | 5077 | goto nla_put_failure; |
bc91b0f0 JP |
5078 | |
5079 | if (nla_put_u8(skb, IFLA_INET6_ADDR_GEN_MODE, idev->addr_gen_mode)) | |
5080 | goto nla_put_failure; | |
5081 | ||
f53adae4 DB |
5082 | read_lock_bh(&idev->lock); |
5083 | memcpy(nla_data(nla), idev->token.s6_addr, nla_len(nla)); | |
5084 | read_unlock_bh(&idev->lock); | |
5085 | ||
b382b191 TG |
5086 | return 0; |
5087 | ||
5088 | nla_put_failure: | |
5089 | return -EMSGSIZE; | |
5090 | } | |
5091 | ||
b1974ed0 AR |
5092 | static size_t inet6_get_link_af_size(const struct net_device *dev, |
5093 | u32 ext_filter_mask) | |
b382b191 TG |
5094 | { |
5095 | if (!__in6_dev_get(dev)) | |
5096 | return 0; | |
5097 | ||
5098 | return inet6_ifla6_size(); | |
5099 | } | |
5100 | ||
d5566fd7 SV |
5101 | static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev, |
5102 | u32 ext_filter_mask) | |
b382b191 TG |
5103 | { |
5104 | struct inet6_dev *idev = __in6_dev_get(dev); | |
5105 | ||
5106 | if (!idev) | |
5107 | return -ENODATA; | |
5108 | ||
d5566fd7 | 5109 | if (inet6_fill_ifla6_attrs(skb, idev, ext_filter_mask) < 0) |
b382b191 TG |
5110 | return -EMSGSIZE; |
5111 | ||
5112 | return 0; | |
5113 | } | |
5114 | ||
f53adae4 DB |
5115 | static int inet6_set_iftoken(struct inet6_dev *idev, struct in6_addr *token) |
5116 | { | |
f53adae4 DB |
5117 | struct inet6_ifaddr *ifp; |
5118 | struct net_device *dev = idev->dev; | |
47e27d5e | 5119 | bool clear_token, update_rs = false; |
dc848292 | 5120 | struct in6_addr ll_addr; |
f53adae4 | 5121 | |
c15b1cca HFS |
5122 | ASSERT_RTNL(); |
5123 | ||
63159f29 | 5124 | if (!token) |
f53adae4 | 5125 | return -EINVAL; |
f53adae4 DB |
5126 | if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) |
5127 | return -EINVAL; | |
f53adae4 DB |
5128 | if (!ipv6_accept_ra(idev)) |
5129 | return -EINVAL; | |
bd11f074 | 5130 | if (idev->cnf.rtr_solicits == 0) |
f53adae4 DB |
5131 | return -EINVAL; |
5132 | ||
5133 | write_lock_bh(&idev->lock); | |
5134 | ||
5135 | BUILD_BUG_ON(sizeof(token->s6_addr) != 16); | |
5136 | memcpy(idev->token.s6_addr + 8, token->s6_addr + 8, 8); | |
5137 | ||
5138 | write_unlock_bh(&idev->lock); | |
5139 | ||
47e27d5e DB |
5140 | clear_token = ipv6_addr_any(token); |
5141 | if (clear_token) | |
5142 | goto update_lft; | |
5143 | ||
dc848292 HFS |
5144 | if (!idev->dead && (idev->if_flags & IF_READY) && |
5145 | !ipv6_get_lladdr(dev, &ll_addr, IFA_F_TENTATIVE | | |
5146 | IFA_F_OPTIMISTIC)) { | |
fc403832 DB |
5147 | /* If we're not ready, then normal ifup will take care |
5148 | * of this. Otherwise, we need to request our rs here. | |
5149 | */ | |
5150 | ndisc_send_rs(dev, &ll_addr, &in6addr_linklocal_allrouters); | |
5151 | update_rs = true; | |
5152 | } | |
f53adae4 | 5153 | |
47e27d5e | 5154 | update_lft: |
f53adae4 | 5155 | write_lock_bh(&idev->lock); |
fc403832 | 5156 | |
77ecaace | 5157 | if (update_rs) { |
fc403832 | 5158 | idev->if_flags |= IF_RS_SENT; |
bd11f074 MŻ |
5159 | idev->rs_interval = rfc3315_s14_backoff_init( |
5160 | idev->cnf.rtr_solicit_interval); | |
77ecaace | 5161 | idev->rs_probes = 1; |
bd11f074 | 5162 | addrconf_mod_rs_timer(idev, idev->rs_interval); |
77ecaace | 5163 | } |
f53adae4 DB |
5164 | |
5165 | /* Well, that's kinda nasty ... */ | |
5166 | list_for_each_entry(ifp, &idev->addr_list, if_list) { | |
5167 | spin_lock(&ifp->lock); | |
617fe29d | 5168 | if (ifp->tokenized) { |
f53adae4 DB |
5169 | ifp->valid_lft = 0; |
5170 | ifp->prefered_lft = 0; | |
5171 | } | |
5172 | spin_unlock(&ifp->lock); | |
5173 | } | |
5174 | ||
5175 | write_unlock_bh(&idev->lock); | |
b2ed64a9 | 5176 | inet6_ifinfo_notify(RTM_NEWLINK, idev); |
c15b1cca | 5177 | addrconf_verify_rtnl(); |
f53adae4 DB |
5178 | return 0; |
5179 | } | |
5180 | ||
11b1f828 DB |
5181 | static const struct nla_policy inet6_af_policy[IFLA_INET6_MAX + 1] = { |
5182 | [IFLA_INET6_ADDR_GEN_MODE] = { .type = NLA_U8 }, | |
5183 | [IFLA_INET6_TOKEN] = { .len = sizeof(struct in6_addr) }, | |
5184 | }; | |
5185 | ||
5186 | static int inet6_validate_link_af(const struct net_device *dev, | |
5187 | const struct nlattr *nla) | |
5188 | { | |
5189 | struct nlattr *tb[IFLA_INET6_MAX + 1]; | |
5190 | ||
5191 | if (dev && !__in6_dev_get(dev)) | |
5192 | return -EAFNOSUPPORT; | |
5193 | ||
5194 | return nla_parse_nested(tb, IFLA_INET6_MAX, nla, inet6_af_policy); | |
5195 | } | |
5196 | ||
f53adae4 DB |
5197 | static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla) |
5198 | { | |
5199 | int err = -EINVAL; | |
5200 | struct inet6_dev *idev = __in6_dev_get(dev); | |
5201 | struct nlattr *tb[IFLA_INET6_MAX + 1]; | |
5202 | ||
5203 | if (!idev) | |
5204 | return -EAFNOSUPPORT; | |
5205 | ||
5206 | if (nla_parse_nested(tb, IFLA_INET6_MAX, nla, NULL) < 0) | |
5207 | BUG(); | |
5208 | ||
bc91b0f0 | 5209 | if (tb[IFLA_INET6_TOKEN]) { |
f53adae4 | 5210 | err = inet6_set_iftoken(idev, nla_data(tb[IFLA_INET6_TOKEN])); |
bc91b0f0 JP |
5211 | if (err) |
5212 | return err; | |
5213 | } | |
5214 | ||
5215 | if (tb[IFLA_INET6_ADDR_GEN_MODE]) { | |
5216 | u8 mode = nla_get_u8(tb[IFLA_INET6_ADDR_GEN_MODE]); | |
5217 | ||
5218 | if (mode != IN6_ADDR_GEN_MODE_EUI64 && | |
622c81d5 | 5219 | mode != IN6_ADDR_GEN_MODE_NONE && |
cc9da6cc BM |
5220 | mode != IN6_ADDR_GEN_MODE_STABLE_PRIVACY && |
5221 | mode != IN6_ADDR_GEN_MODE_RANDOM) | |
622c81d5 HFS |
5222 | return -EINVAL; |
5223 | ||
5224 | if (mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY && | |
5225 | !idev->cnf.stable_secret.initialized && | |
5226 | !dev_net(dev)->ipv6.devconf_dflt->stable_secret.initialized) | |
bc91b0f0 | 5227 | return -EINVAL; |
622c81d5 | 5228 | |
bc91b0f0 JP |
5229 | idev->addr_gen_mode = mode; |
5230 | err = 0; | |
5231 | } | |
f53adae4 DB |
5232 | |
5233 | return err; | |
5234 | } | |
5235 | ||
1ab1457c | 5236 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 5237 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 5238 | { |
04561c1f | 5239 | struct net_device *dev = idev->dev; |
04561c1f TG |
5240 | struct ifinfomsg *hdr; |
5241 | struct nlmsghdr *nlh; | |
5242 | void *protoinfo; | |
04561c1f | 5243 | |
15e47304 | 5244 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*hdr), flags); |
63159f29 | 5245 | if (!nlh) |
26932566 | 5246 | return -EMSGSIZE; |
04561c1f TG |
5247 | |
5248 | hdr = nlmsg_data(nlh); | |
5249 | hdr->ifi_family = AF_INET6; | |
5250 | hdr->__ifi_pad = 0; | |
5251 | hdr->ifi_type = dev->type; | |
5252 | hdr->ifi_index = dev->ifindex; | |
5253 | hdr->ifi_flags = dev_get_flags(dev); | |
5254 | hdr->ifi_change = 0; | |
5255 | ||
c78679e8 DM |
5256 | if (nla_put_string(skb, IFLA_IFNAME, dev->name) || |
5257 | (dev->addr_len && | |
5258 | nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || | |
5259 | nla_put_u32(skb, IFLA_MTU, dev->mtu) || | |
a54acb3a | 5260 | (dev->ifindex != dev_get_iflink(dev) && |
0344338b AG |
5261 | nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) || |
5262 | nla_put_u8(skb, IFLA_OPERSTATE, | |
5263 | netif_running(dev) ? dev->operstate : IF_OPER_DOWN)) | |
c78679e8 | 5264 | goto nla_put_failure; |
04561c1f | 5265 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
63159f29 | 5266 | if (!protoinfo) |
04561c1f | 5267 | goto nla_put_failure; |
1da177e4 | 5268 | |
d5566fd7 | 5269 | if (inet6_fill_ifla6_attrs(skb, idev, 0) < 0) |
bf99f1bd | 5270 | goto nla_put_failure; |
1da177e4 | 5271 | |
04561c1f | 5272 | nla_nest_end(skb, protoinfo); |
053c095a JB |
5273 | nlmsg_end(skb, nlh); |
5274 | return 0; | |
1da177e4 | 5275 | |
04561c1f | 5276 | nla_put_failure: |
26932566 PM |
5277 | nlmsg_cancel(skb, nlh); |
5278 | return -EMSGSIZE; | |
1da177e4 LT |
5279 | } |
5280 | ||
5281 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
5282 | { | |
3b1e0a65 | 5283 | struct net *net = sock_net(skb->sk); |
84d2697d | 5284 | int h, s_h; |
434a8a58 | 5285 | int idx = 0, s_idx; |
1da177e4 LT |
5286 | struct net_device *dev; |
5287 | struct inet6_dev *idev; | |
84d2697d | 5288 | struct hlist_head *head; |
1da177e4 | 5289 | |
84d2697d ED |
5290 | s_h = cb->args[0]; |
5291 | s_idx = cb->args[1]; | |
5292 | ||
5293 | rcu_read_lock(); | |
5294 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
5295 | idx = 0; | |
5296 | head = &net->dev_index_head[h]; | |
b67bfe0d | 5297 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
84d2697d ED |
5298 | if (idx < s_idx) |
5299 | goto cont; | |
5300 | idev = __in6_dev_get(dev); | |
5301 | if (!idev) | |
5302 | goto cont; | |
5303 | if (inet6_fill_ifinfo(skb, idev, | |
15e47304 | 5304 | NETLINK_CB(cb->skb).portid, |
84d2697d | 5305 | cb->nlh->nlmsg_seq, |
053c095a | 5306 | RTM_NEWLINK, NLM_F_MULTI) < 0) |
84d2697d | 5307 | goto out; |
7562f876 | 5308 | cont: |
84d2697d ED |
5309 | idx++; |
5310 | } | |
1da177e4 | 5311 | } |
84d2697d ED |
5312 | out: |
5313 | rcu_read_unlock(); | |
5314 | cb->args[1] = idx; | |
5315 | cb->args[0] = h; | |
1da177e4 LT |
5316 | |
5317 | return skb->len; | |
5318 | } | |
5319 | ||
5320 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
5321 | { | |
5322 | struct sk_buff *skb; | |
c346dca1 | 5323 | struct net *net = dev_net(idev->dev); |
8d7a76c9 | 5324 | int err = -ENOBUFS; |
1ab1457c | 5325 | |
339bf98f | 5326 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
63159f29 | 5327 | if (!skb) |
8d7a76c9 TG |
5328 | goto errout; |
5329 | ||
5330 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
5331 | if (err < 0) { |
5332 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
5333 | WARN_ON(err == -EMSGSIZE); | |
5334 | kfree_skb(skb); | |
5335 | goto errout; | |
5336 | } | |
5f75a104 | 5337 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC); |
1ce85fe4 | 5338 | return; |
8d7a76c9 TG |
5339 | errout: |
5340 | if (err < 0) | |
5f75a104 | 5341 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err); |
1da177e4 LT |
5342 | } |
5343 | ||
339bf98f TG |
5344 | static inline size_t inet6_prefix_nlmsg_size(void) |
5345 | { | |
5346 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
5347 | + nla_total_size(sizeof(struct in6_addr)) | |
5348 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
5349 | } | |
c5396a31 | 5350 | |
1da177e4 | 5351 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 5352 | struct prefix_info *pinfo, u32 portid, u32 seq, |
6051e2f4 | 5353 | int event, unsigned int flags) |
1da177e4 | 5354 | { |
6051e2f4 TG |
5355 | struct prefixmsg *pmsg; |
5356 | struct nlmsghdr *nlh; | |
1da177e4 LT |
5357 | struct prefix_cacheinfo ci; |
5358 | ||
15e47304 | 5359 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*pmsg), flags); |
63159f29 | 5360 | if (!nlh) |
26932566 | 5361 | return -EMSGSIZE; |
6051e2f4 TG |
5362 | |
5363 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 5364 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
5365 | pmsg->prefix_pad1 = 0; |
5366 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
5367 | pmsg->prefix_ifindex = idev->dev->ifindex; |
5368 | pmsg->prefix_len = pinfo->prefix_len; | |
5369 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 5370 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
5371 | pmsg->prefix_flags = 0; |
5372 | if (pinfo->onlink) | |
5373 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
5374 | if (pinfo->autoconf) | |
5375 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
5376 | ||
c78679e8 DM |
5377 | if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix)) |
5378 | goto nla_put_failure; | |
1da177e4 LT |
5379 | ci.preferred_time = ntohl(pinfo->prefered); |
5380 | ci.valid_time = ntohl(pinfo->valid); | |
c78679e8 DM |
5381 | if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci)) |
5382 | goto nla_put_failure; | |
053c095a JB |
5383 | nlmsg_end(skb, nlh); |
5384 | return 0; | |
1da177e4 | 5385 | |
6051e2f4 | 5386 | nla_put_failure: |
26932566 PM |
5387 | nlmsg_cancel(skb, nlh); |
5388 | return -EMSGSIZE; | |
1da177e4 LT |
5389 | } |
5390 | ||
1ab1457c | 5391 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
5392 | struct prefix_info *pinfo) |
5393 | { | |
5394 | struct sk_buff *skb; | |
c346dca1 | 5395 | struct net *net = dev_net(idev->dev); |
8c384bfa | 5396 | int err = -ENOBUFS; |
1da177e4 | 5397 | |
339bf98f | 5398 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
63159f29 | 5399 | if (!skb) |
8c384bfa TG |
5400 | goto errout; |
5401 | ||
5402 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
5403 | if (err < 0) { |
5404 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
5405 | WARN_ON(err == -EMSGSIZE); | |
5406 | kfree_skb(skb); | |
5407 | goto errout; | |
5408 | } | |
1ce85fe4 PNA |
5409 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
5410 | return; | |
8c384bfa TG |
5411 | errout: |
5412 | if (err < 0) | |
6fda7350 | 5413 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4 LT |
5414 | } |
5415 | ||
1da177e4 LT |
5416 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
5417 | { | |
63998ac2 ND |
5418 | struct net *net = dev_net(ifp->idev->dev); |
5419 | ||
c15b1cca HFS |
5420 | if (event) |
5421 | ASSERT_RTNL(); | |
5422 | ||
1da177e4 LT |
5423 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); |
5424 | ||
5425 | switch (event) { | |
5426 | case RTM_NEWADDR: | |
95c385b4 NH |
5427 | /* |
5428 | * If the address was optimistic | |
5429 | * we inserted the route at the start of | |
5430 | * our DAD process, so we don't need | |
5431 | * to do it again | |
5432 | */ | |
5433 | if (!(ifp->rt->rt6i_node)) | |
5434 | ip6_ins_rt(ifp->rt); | |
1da177e4 LT |
5435 | if (ifp->idev->cnf.forwarding) |
5436 | addrconf_join_anycast(ifp); | |
7996c799 | 5437 | if (!ipv6_addr_any(&ifp->peer_addr)) |
caeaba79 ND |
5438 | addrconf_prefix_route(&ifp->peer_addr, 128, |
5439 | ifp->idev->dev, 0, 0); | |
1da177e4 LT |
5440 | break; |
5441 | case RTM_DELADDR: | |
5442 | if (ifp->idev->cnf.forwarding) | |
5443 | addrconf_leave_anycast(ifp); | |
5444 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
7996c799 | 5445 | if (!ipv6_addr_any(&ifp->peer_addr)) { |
caeaba79 | 5446 | struct rt6_info *rt; |
caeaba79 | 5447 | |
e7478dfc ND |
5448 | rt = addrconf_get_prefix_route(&ifp->peer_addr, 128, |
5449 | ifp->idev->dev, 0, 0); | |
8e3d5be7 MKL |
5450 | if (rt) |
5451 | ip6_del_rt(rt); | |
caeaba79 | 5452 | } |
38bd10c4 DA |
5453 | if (ifp->rt) { |
5454 | dst_hold(&ifp->rt->dst); | |
5455 | ip6_del_rt(ifp->rt); | |
5456 | } | |
705f1c86 | 5457 | rt_genid_bump_ipv6(net); |
1da177e4 LT |
5458 | break; |
5459 | } | |
63998ac2 | 5460 | atomic_inc(&net->ipv6.dev_addr_genid); |
1da177e4 LT |
5461 | } |
5462 | ||
5463 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
5464 | { | |
8814c4b5 | 5465 | rcu_read_lock_bh(); |
1da177e4 LT |
5466 | if (likely(ifp->idev->dead == 0)) |
5467 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 5468 | rcu_read_unlock_bh(); |
1da177e4 LT |
5469 | } |
5470 | ||
5471 | #ifdef CONFIG_SYSCTL | |
5472 | ||
5473 | static | |
fe2c6338 | 5474 | int addrconf_sysctl_forward(struct ctl_table *ctl, int write, |
1da177e4 LT |
5475 | void __user *buffer, size_t *lenp, loff_t *ppos) |
5476 | { | |
5477 | int *valp = ctl->data; | |
5478 | int val = *valp; | |
88af182e | 5479 | loff_t pos = *ppos; |
fe2c6338 | 5480 | struct ctl_table lctl; |
1da177e4 LT |
5481 | int ret; |
5482 | ||
013d97e9 FR |
5483 | /* |
5484 | * ctl->data points to idev->cnf.forwarding, we should | |
5485 | * not modify it until we get the rtnl lock. | |
5486 | */ | |
5487 | lctl = *ctl; | |
5488 | lctl.data = &val; | |
5489 | ||
5490 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
1da177e4 | 5491 | |
c8fecf22 | 5492 | if (write) |
b325fddb | 5493 | ret = addrconf_fixup_forwarding(ctl, valp, val); |
88af182e EB |
5494 | if (ret) |
5495 | *ppos = pos; | |
1ab1457c | 5496 | return ret; |
1da177e4 LT |
5497 | } |
5498 | ||
77751427 ML |
5499 | static |
5500 | int addrconf_sysctl_mtu(struct ctl_table *ctl, int write, | |
5501 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
5502 | { | |
5503 | struct inet6_dev *idev = ctl->extra1; | |
5504 | int min_mtu = IPV6_MIN_MTU; | |
5505 | struct ctl_table lctl; | |
5506 | ||
5507 | lctl = *ctl; | |
5508 | lctl.extra1 = &min_mtu; | |
5509 | lctl.extra2 = idev ? &idev->dev->mtu : NULL; | |
5510 | ||
5511 | return proc_dointvec_minmax(&lctl, write, buffer, lenp, ppos); | |
5512 | } | |
5513 | ||
56d417b1 BH |
5514 | static void dev_disable_change(struct inet6_dev *idev) |
5515 | { | |
75538c2b CW |
5516 | struct netdev_notifier_info info; |
5517 | ||
56d417b1 BH |
5518 | if (!idev || !idev->dev) |
5519 | return; | |
5520 | ||
75538c2b | 5521 | netdev_notifier_info_init(&info, idev->dev); |
56d417b1 | 5522 | if (idev->cnf.disable_ipv6) |
75538c2b | 5523 | addrconf_notify(NULL, NETDEV_DOWN, &info); |
56d417b1 | 5524 | else |
75538c2b | 5525 | addrconf_notify(NULL, NETDEV_UP, &info); |
56d417b1 BH |
5526 | } |
5527 | ||
5528 | static void addrconf_disable_change(struct net *net, __s32 newf) | |
5529 | { | |
5530 | struct net_device *dev; | |
5531 | struct inet6_dev *idev; | |
5532 | ||
c6d14c84 ED |
5533 | rcu_read_lock(); |
5534 | for_each_netdev_rcu(net, dev) { | |
56d417b1 BH |
5535 | idev = __in6_dev_get(dev); |
5536 | if (idev) { | |
5537 | int changed = (!idev->cnf.disable_ipv6) ^ (!newf); | |
5538 | idev->cnf.disable_ipv6 = newf; | |
5539 | if (changed) | |
5540 | dev_disable_change(idev); | |
5541 | } | |
56d417b1 | 5542 | } |
c6d14c84 | 5543 | rcu_read_unlock(); |
56d417b1 BH |
5544 | } |
5545 | ||
013d97e9 | 5546 | static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf) |
56d417b1 BH |
5547 | { |
5548 | struct net *net; | |
013d97e9 FR |
5549 | int old; |
5550 | ||
5551 | if (!rtnl_trylock()) | |
5552 | return restart_syscall(); | |
56d417b1 BH |
5553 | |
5554 | net = (struct net *)table->extra2; | |
013d97e9 FR |
5555 | old = *p; |
5556 | *p = newf; | |
56d417b1 | 5557 | |
013d97e9 FR |
5558 | if (p == &net->ipv6.devconf_dflt->disable_ipv6) { |
5559 | rtnl_unlock(); | |
56d417b1 | 5560 | return 0; |
88af182e | 5561 | } |
56d417b1 BH |
5562 | |
5563 | if (p == &net->ipv6.devconf_all->disable_ipv6) { | |
56d417b1 BH |
5564 | net->ipv6.devconf_dflt->disable_ipv6 = newf; |
5565 | addrconf_disable_change(net, newf); | |
013d97e9 | 5566 | } else if ((!newf) ^ (!old)) |
56d417b1 BH |
5567 | dev_disable_change((struct inet6_dev *)table->extra1); |
5568 | ||
5569 | rtnl_unlock(); | |
5570 | return 0; | |
5571 | } | |
5572 | ||
5573 | static | |
fe2c6338 | 5574 | int addrconf_sysctl_disable(struct ctl_table *ctl, int write, |
56d417b1 BH |
5575 | void __user *buffer, size_t *lenp, loff_t *ppos) |
5576 | { | |
5577 | int *valp = ctl->data; | |
5578 | int val = *valp; | |
88af182e | 5579 | loff_t pos = *ppos; |
fe2c6338 | 5580 | struct ctl_table lctl; |
56d417b1 BH |
5581 | int ret; |
5582 | ||
013d97e9 FR |
5583 | /* |
5584 | * ctl->data points to idev->cnf.disable_ipv6, we should | |
5585 | * not modify it until we get the rtnl lock. | |
5586 | */ | |
5587 | lctl = *ctl; | |
5588 | lctl.data = &val; | |
5589 | ||
5590 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
56d417b1 BH |
5591 | |
5592 | if (write) | |
5593 | ret = addrconf_disable_ipv6(ctl, valp, val); | |
88af182e EB |
5594 | if (ret) |
5595 | *ppos = pos; | |
56d417b1 BH |
5596 | return ret; |
5597 | } | |
5598 | ||
c92d5491 | 5599 | static |
5600 | int addrconf_sysctl_proxy_ndp(struct ctl_table *ctl, int write, | |
5601 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
5602 | { | |
5603 | int *valp = ctl->data; | |
5604 | int ret; | |
5605 | int old, new; | |
5606 | ||
5607 | old = *valp; | |
5608 | ret = proc_dointvec(ctl, write, buffer, lenp, ppos); | |
5609 | new = *valp; | |
5610 | ||
5611 | if (write && old != new) { | |
5612 | struct net *net = ctl->extra2; | |
5613 | ||
5614 | if (!rtnl_trylock()) | |
5615 | return restart_syscall(); | |
5616 | ||
5617 | if (valp == &net->ipv6.devconf_dflt->proxy_ndp) | |
5618 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, | |
5619 | NETCONFA_IFINDEX_DEFAULT, | |
5620 | net->ipv6.devconf_dflt); | |
5621 | else if (valp == &net->ipv6.devconf_all->proxy_ndp) | |
5622 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, | |
5623 | NETCONFA_IFINDEX_ALL, | |
5624 | net->ipv6.devconf_all); | |
5625 | else { | |
5626 | struct inet6_dev *idev = ctl->extra1; | |
5627 | ||
5628 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, | |
5629 | idev->dev->ifindex, | |
5630 | &idev->cnf); | |
5631 | } | |
5632 | rtnl_unlock(); | |
5633 | } | |
5634 | ||
5635 | return ret; | |
5636 | } | |
5637 | ||
3d1bec99 HFS |
5638 | static int addrconf_sysctl_stable_secret(struct ctl_table *ctl, int write, |
5639 | void __user *buffer, size_t *lenp, | |
5640 | loff_t *ppos) | |
5641 | { | |
5642 | int err; | |
5643 | struct in6_addr addr; | |
5644 | char str[IPV6_MAX_STRLEN]; | |
5645 | struct ctl_table lctl = *ctl; | |
622c81d5 | 5646 | struct net *net = ctl->extra2; |
3d1bec99 HFS |
5647 | struct ipv6_stable_secret *secret = ctl->data; |
5648 | ||
622c81d5 HFS |
5649 | if (&net->ipv6.devconf_all->stable_secret == ctl->data) |
5650 | return -EIO; | |
5651 | ||
3d1bec99 HFS |
5652 | lctl.maxlen = IPV6_MAX_STRLEN; |
5653 | lctl.data = str; | |
5654 | ||
5655 | if (!rtnl_trylock()) | |
5656 | return restart_syscall(); | |
5657 | ||
5658 | if (!write && !secret->initialized) { | |
5659 | err = -EIO; | |
5660 | goto out; | |
5661 | } | |
5662 | ||
5449a5ca WC |
5663 | err = snprintf(str, sizeof(str), "%pI6", &secret->secret); |
5664 | if (err >= sizeof(str)) { | |
5665 | err = -EIO; | |
5666 | goto out; | |
3d1bec99 HFS |
5667 | } |
5668 | ||
5669 | err = proc_dostring(&lctl, write, buffer, lenp, ppos); | |
5670 | if (err || !write) | |
5671 | goto out; | |
5672 | ||
5673 | if (in6_pton(str, -1, addr.in6_u.u6_addr8, -1, NULL) != 1) { | |
5674 | err = -EIO; | |
5675 | goto out; | |
5676 | } | |
5677 | ||
5678 | secret->initialized = true; | |
5679 | secret->secret = addr; | |
5680 | ||
622c81d5 HFS |
5681 | if (&net->ipv6.devconf_dflt->stable_secret == ctl->data) { |
5682 | struct net_device *dev; | |
5683 | ||
5684 | for_each_netdev(net, dev) { | |
5685 | struct inet6_dev *idev = __in6_dev_get(dev); | |
5686 | ||
5687 | if (idev) { | |
5688 | idev->addr_gen_mode = | |
5689 | IN6_ADDR_GEN_MODE_STABLE_PRIVACY; | |
5690 | } | |
5691 | } | |
5692 | } else { | |
5693 | struct inet6_dev *idev = ctl->extra1; | |
5694 | ||
5695 | idev->addr_gen_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY; | |
5696 | } | |
5697 | ||
3d1bec99 HFS |
5698 | out: |
5699 | rtnl_unlock(); | |
5700 | ||
5701 | return err; | |
5702 | } | |
c92d5491 | 5703 | |
35103d11 AG |
5704 | static |
5705 | int addrconf_sysctl_ignore_routes_with_linkdown(struct ctl_table *ctl, | |
5706 | int write, | |
5707 | void __user *buffer, | |
5708 | size_t *lenp, | |
5709 | loff_t *ppos) | |
5710 | { | |
5711 | int *valp = ctl->data; | |
5712 | int val = *valp; | |
5713 | loff_t pos = *ppos; | |
5714 | struct ctl_table lctl; | |
5715 | int ret; | |
5716 | ||
5717 | /* ctl->data points to idev->cnf.ignore_routes_when_linkdown | |
5718 | * we should not modify it until we get the rtnl lock. | |
5719 | */ | |
5720 | lctl = *ctl; | |
5721 | lctl.data = &val; | |
5722 | ||
5723 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
5724 | ||
5725 | if (write) | |
5726 | ret = addrconf_fixup_linkdown(ctl, valp, val); | |
5727 | if (ret) | |
5728 | *ppos = pos; | |
5729 | return ret; | |
5730 | } | |
5731 | ||
cb4a4c69 | 5732 | static int minus_one = -1; |
cb9e684e MŻ |
5733 | static const int one = 1; |
5734 | static const int two_five_five = 255; | |
5735 | ||
607ea7cd | 5736 | static const struct ctl_table addrconf_sysctl[] = { |
5df1f77f KK |
5737 | { |
5738 | .procname = "forwarding", | |
5739 | .data = &ipv6_devconf.forwarding, | |
5740 | .maxlen = sizeof(int), | |
5741 | .mode = 0644, | |
5742 | .proc_handler = addrconf_sysctl_forward, | |
5743 | }, | |
5744 | { | |
5745 | .procname = "hop_limit", | |
5746 | .data = &ipv6_devconf.hop_limit, | |
5747 | .maxlen = sizeof(int), | |
5748 | .mode = 0644, | |
cb9e684e MŻ |
5749 | .proc_handler = proc_dointvec_minmax, |
5750 | .extra1 = (void *)&one, | |
5751 | .extra2 = (void *)&two_five_five, | |
5df1f77f KK |
5752 | }, |
5753 | { | |
5754 | .procname = "mtu", | |
5755 | .data = &ipv6_devconf.mtu6, | |
5756 | .maxlen = sizeof(int), | |
5757 | .mode = 0644, | |
5758 | .proc_handler = addrconf_sysctl_mtu, | |
5759 | }, | |
5760 | { | |
5761 | .procname = "accept_ra", | |
5762 | .data = &ipv6_devconf.accept_ra, | |
5763 | .maxlen = sizeof(int), | |
5764 | .mode = 0644, | |
5765 | .proc_handler = proc_dointvec, | |
5766 | }, | |
5767 | { | |
5768 | .procname = "accept_redirects", | |
5769 | .data = &ipv6_devconf.accept_redirects, | |
5770 | .maxlen = sizeof(int), | |
5771 | .mode = 0644, | |
5772 | .proc_handler = proc_dointvec, | |
5773 | }, | |
5774 | { | |
5775 | .procname = "autoconf", | |
5776 | .data = &ipv6_devconf.autoconf, | |
5777 | .maxlen = sizeof(int), | |
5778 | .mode = 0644, | |
5779 | .proc_handler = proc_dointvec, | |
5780 | }, | |
5781 | { | |
5782 | .procname = "dad_transmits", | |
5783 | .data = &ipv6_devconf.dad_transmits, | |
5784 | .maxlen = sizeof(int), | |
5785 | .mode = 0644, | |
5786 | .proc_handler = proc_dointvec, | |
5787 | }, | |
5788 | { | |
5789 | .procname = "router_solicitations", | |
5790 | .data = &ipv6_devconf.rtr_solicits, | |
5791 | .maxlen = sizeof(int), | |
5792 | .mode = 0644, | |
cb4a4c69 MŻ |
5793 | .proc_handler = proc_dointvec_minmax, |
5794 | .extra1 = &minus_one, | |
5df1f77f KK |
5795 | }, |
5796 | { | |
5797 | .procname = "router_solicitation_interval", | |
5798 | .data = &ipv6_devconf.rtr_solicit_interval, | |
5799 | .maxlen = sizeof(int), | |
5800 | .mode = 0644, | |
5801 | .proc_handler = proc_dointvec_jiffies, | |
5802 | }, | |
bd11f074 MŻ |
5803 | { |
5804 | .procname = "router_solicitation_max_interval", | |
5805 | .data = &ipv6_devconf.rtr_solicit_max_interval, | |
5806 | .maxlen = sizeof(int), | |
5807 | .mode = 0644, | |
5808 | .proc_handler = proc_dointvec_jiffies, | |
5809 | }, | |
5df1f77f KK |
5810 | { |
5811 | .procname = "router_solicitation_delay", | |
5812 | .data = &ipv6_devconf.rtr_solicit_delay, | |
5813 | .maxlen = sizeof(int), | |
5814 | .mode = 0644, | |
5815 | .proc_handler = proc_dointvec_jiffies, | |
5816 | }, | |
5817 | { | |
5818 | .procname = "force_mld_version", | |
5819 | .data = &ipv6_devconf.force_mld_version, | |
5820 | .maxlen = sizeof(int), | |
5821 | .mode = 0644, | |
5822 | .proc_handler = proc_dointvec, | |
5823 | }, | |
5824 | { | |
5825 | .procname = "mldv1_unsolicited_report_interval", | |
5826 | .data = | |
5827 | &ipv6_devconf.mldv1_unsolicited_report_interval, | |
5828 | .maxlen = sizeof(int), | |
5829 | .mode = 0644, | |
5830 | .proc_handler = proc_dointvec_ms_jiffies, | |
5831 | }, | |
5832 | { | |
5833 | .procname = "mldv2_unsolicited_report_interval", | |
5834 | .data = | |
5835 | &ipv6_devconf.mldv2_unsolicited_report_interval, | |
5836 | .maxlen = sizeof(int), | |
5837 | .mode = 0644, | |
5838 | .proc_handler = proc_dointvec_ms_jiffies, | |
5839 | }, | |
5840 | { | |
5841 | .procname = "use_tempaddr", | |
5842 | .data = &ipv6_devconf.use_tempaddr, | |
5843 | .maxlen = sizeof(int), | |
5844 | .mode = 0644, | |
5845 | .proc_handler = proc_dointvec, | |
5846 | }, | |
5847 | { | |
5848 | .procname = "temp_valid_lft", | |
5849 | .data = &ipv6_devconf.temp_valid_lft, | |
5850 | .maxlen = sizeof(int), | |
5851 | .mode = 0644, | |
5852 | .proc_handler = proc_dointvec, | |
5853 | }, | |
5854 | { | |
5855 | .procname = "temp_prefered_lft", | |
5856 | .data = &ipv6_devconf.temp_prefered_lft, | |
5857 | .maxlen = sizeof(int), | |
5858 | .mode = 0644, | |
5859 | .proc_handler = proc_dointvec, | |
5860 | }, | |
5861 | { | |
5862 | .procname = "regen_max_retry", | |
5863 | .data = &ipv6_devconf.regen_max_retry, | |
5864 | .maxlen = sizeof(int), | |
5865 | .mode = 0644, | |
5866 | .proc_handler = proc_dointvec, | |
5867 | }, | |
5868 | { | |
5869 | .procname = "max_desync_factor", | |
5870 | .data = &ipv6_devconf.max_desync_factor, | |
5871 | .maxlen = sizeof(int), | |
5872 | .mode = 0644, | |
5873 | .proc_handler = proc_dointvec, | |
5874 | }, | |
5875 | { | |
5876 | .procname = "max_addresses", | |
5877 | .data = &ipv6_devconf.max_addresses, | |
5878 | .maxlen = sizeof(int), | |
5879 | .mode = 0644, | |
5880 | .proc_handler = proc_dointvec, | |
5881 | }, | |
5882 | { | |
5883 | .procname = "accept_ra_defrtr", | |
5884 | .data = &ipv6_devconf.accept_ra_defrtr, | |
5885 | .maxlen = sizeof(int), | |
5886 | .mode = 0644, | |
5887 | .proc_handler = proc_dointvec, | |
5888 | }, | |
5889 | { | |
5890 | .procname = "accept_ra_min_hop_limit", | |
5891 | .data = &ipv6_devconf.accept_ra_min_hop_limit, | |
5892 | .maxlen = sizeof(int), | |
5893 | .mode = 0644, | |
5894 | .proc_handler = proc_dointvec, | |
5895 | }, | |
5896 | { | |
5897 | .procname = "accept_ra_pinfo", | |
5898 | .data = &ipv6_devconf.accept_ra_pinfo, | |
5899 | .maxlen = sizeof(int), | |
5900 | .mode = 0644, | |
5901 | .proc_handler = proc_dointvec, | |
5902 | }, | |
930d6ff2 | 5903 | #ifdef CONFIG_IPV6_ROUTER_PREF |
5df1f77f KK |
5904 | { |
5905 | .procname = "accept_ra_rtr_pref", | |
5906 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
5907 | .maxlen = sizeof(int), | |
5908 | .mode = 0644, | |
5909 | .proc_handler = proc_dointvec, | |
5910 | }, | |
5911 | { | |
5912 | .procname = "router_probe_interval", | |
5913 | .data = &ipv6_devconf.rtr_probe_interval, | |
5914 | .maxlen = sizeof(int), | |
5915 | .mode = 0644, | |
5916 | .proc_handler = proc_dointvec_jiffies, | |
5917 | }, | |
fa03ef38 | 5918 | #ifdef CONFIG_IPV6_ROUTE_INFO |
5df1f77f KK |
5919 | { |
5920 | .procname = "accept_ra_rt_info_max_plen", | |
5921 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
5922 | .maxlen = sizeof(int), | |
5923 | .mode = 0644, | |
5924 | .proc_handler = proc_dointvec, | |
5925 | }, | |
09c884d4 | 5926 | #endif |
930d6ff2 | 5927 | #endif |
5df1f77f KK |
5928 | { |
5929 | .procname = "proxy_ndp", | |
5930 | .data = &ipv6_devconf.proxy_ndp, | |
5931 | .maxlen = sizeof(int), | |
5932 | .mode = 0644, | |
5933 | .proc_handler = addrconf_sysctl_proxy_ndp, | |
5934 | }, | |
5935 | { | |
5936 | .procname = "accept_source_route", | |
5937 | .data = &ipv6_devconf.accept_source_route, | |
5938 | .maxlen = sizeof(int), | |
5939 | .mode = 0644, | |
5940 | .proc_handler = proc_dointvec, | |
5941 | }, | |
95c385b4 | 5942 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
5df1f77f KK |
5943 | { |
5944 | .procname = "optimistic_dad", | |
5945 | .data = &ipv6_devconf.optimistic_dad, | |
5946 | .maxlen = sizeof(int), | |
5947 | .mode = 0644, | |
5948 | .proc_handler = proc_dointvec, | |
5949 | }, | |
5950 | { | |
5951 | .procname = "use_optimistic", | |
5952 | .data = &ipv6_devconf.use_optimistic, | |
5953 | .maxlen = sizeof(int), | |
5954 | .mode = 0644, | |
5955 | .proc_handler = proc_dointvec, | |
5956 | }, | |
7bc570c8 YH |
5957 | #endif |
5958 | #ifdef CONFIG_IPV6_MROUTE | |
5df1f77f KK |
5959 | { |
5960 | .procname = "mc_forwarding", | |
5961 | .data = &ipv6_devconf.mc_forwarding, | |
5962 | .maxlen = sizeof(int), | |
5963 | .mode = 0444, | |
5964 | .proc_handler = proc_dointvec, | |
5965 | }, | |
95c385b4 | 5966 | #endif |
5df1f77f KK |
5967 | { |
5968 | .procname = "disable_ipv6", | |
5969 | .data = &ipv6_devconf.disable_ipv6, | |
5970 | .maxlen = sizeof(int), | |
5971 | .mode = 0644, | |
5972 | .proc_handler = addrconf_sysctl_disable, | |
5973 | }, | |
5974 | { | |
5975 | .procname = "accept_dad", | |
5976 | .data = &ipv6_devconf.accept_dad, | |
5977 | .maxlen = sizeof(int), | |
5978 | .mode = 0644, | |
5979 | .proc_handler = proc_dointvec, | |
5980 | }, | |
5981 | { | |
5982 | .procname = "force_tllao", | |
5983 | .data = &ipv6_devconf.force_tllao, | |
5984 | .maxlen = sizeof(int), | |
5985 | .mode = 0644, | |
5986 | .proc_handler = proc_dointvec | |
5987 | }, | |
5988 | { | |
5989 | .procname = "ndisc_notify", | |
5990 | .data = &ipv6_devconf.ndisc_notify, | |
5991 | .maxlen = sizeof(int), | |
5992 | .mode = 0644, | |
5993 | .proc_handler = proc_dointvec | |
5994 | }, | |
5995 | { | |
5996 | .procname = "suppress_frag_ndisc", | |
5997 | .data = &ipv6_devconf.suppress_frag_ndisc, | |
5998 | .maxlen = sizeof(int), | |
5999 | .mode = 0644, | |
6000 | .proc_handler = proc_dointvec | |
6001 | }, | |
6002 | { | |
6003 | .procname = "accept_ra_from_local", | |
6004 | .data = &ipv6_devconf.accept_ra_from_local, | |
6005 | .maxlen = sizeof(int), | |
6006 | .mode = 0644, | |
6007 | .proc_handler = proc_dointvec, | |
6008 | }, | |
6009 | { | |
6010 | .procname = "accept_ra_mtu", | |
6011 | .data = &ipv6_devconf.accept_ra_mtu, | |
6012 | .maxlen = sizeof(int), | |
6013 | .mode = 0644, | |
6014 | .proc_handler = proc_dointvec, | |
6015 | }, | |
6016 | { | |
6017 | .procname = "stable_secret", | |
6018 | .data = &ipv6_devconf.stable_secret, | |
6019 | .maxlen = IPV6_MAX_STRLEN, | |
6020 | .mode = 0600, | |
6021 | .proc_handler = addrconf_sysctl_stable_secret, | |
6022 | }, | |
6023 | { | |
6024 | .procname = "use_oif_addrs_only", | |
6025 | .data = &ipv6_devconf.use_oif_addrs_only, | |
6026 | .maxlen = sizeof(int), | |
6027 | .mode = 0644, | |
6028 | .proc_handler = proc_dointvec, | |
6029 | }, | |
6030 | { | |
6031 | .procname = "ignore_routes_with_linkdown", | |
6032 | .data = &ipv6_devconf.ignore_routes_with_linkdown, | |
6033 | .maxlen = sizeof(int), | |
6034 | .mode = 0644, | |
6035 | .proc_handler = addrconf_sysctl_ignore_routes_with_linkdown, | |
6036 | }, | |
6037 | { | |
6038 | .procname = "drop_unicast_in_l2_multicast", | |
6039 | .data = &ipv6_devconf.drop_unicast_in_l2_multicast, | |
6040 | .maxlen = sizeof(int), | |
6041 | .mode = 0644, | |
6042 | .proc_handler = proc_dointvec, | |
6043 | }, | |
6044 | { | |
6045 | .procname = "drop_unsolicited_na", | |
6046 | .data = &ipv6_devconf.drop_unsolicited_na, | |
6047 | .maxlen = sizeof(int), | |
6048 | .mode = 0644, | |
6049 | .proc_handler = proc_dointvec, | |
6050 | }, | |
6051 | { | |
6052 | .procname = "keep_addr_on_down", | |
6053 | .data = &ipv6_devconf.keep_addr_on_down, | |
6054 | .maxlen = sizeof(int), | |
6055 | .mode = 0644, | |
6056 | .proc_handler = proc_dointvec, | |
6057 | ||
6058 | }, | |
6059 | { | |
6060 | /* sentinel */ | |
6061 | } | |
1da177e4 LT |
6062 | }; |
6063 | ||
bff16c2f | 6064 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
f8572d8f | 6065 | struct inet6_dev *idev, struct ipv6_devconf *p) |
1da177e4 | 6066 | { |
29c994e3 | 6067 | int i, ifindex; |
607ea7cd | 6068 | struct ctl_table *table; |
6105e293 | 6069 | char path[sizeof("net/ipv6/conf/") + IFNAMSIZ]; |
1dab6222 | 6070 | |
607ea7cd KK |
6071 | table = kmemdup(addrconf_sysctl, sizeof(addrconf_sysctl), GFP_KERNEL); |
6072 | if (!table) | |
f68635e6 PE |
6073 | goto out; |
6074 | ||
607ea7cd KK |
6075 | for (i = 0; table[i].data; i++) { |
6076 | table[i].data += (char *)p - (char *)&ipv6_devconf; | |
cb9e684e MŻ |
6077 | /* If one of these is already set, then it is not safe to |
6078 | * overwrite either of them: this makes proc_dointvec_minmax | |
6079 | * usable. | |
6080 | */ | |
6081 | if (!table[i].extra1 && !table[i].extra2) { | |
6082 | table[i].extra1 = idev; /* embedded; no ref */ | |
6083 | table[i].extra2 = net; | |
6084 | } | |
1da177e4 | 6085 | } |
1da177e4 | 6086 | |
6105e293 | 6087 | snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name); |
1da177e4 | 6088 | |
607ea7cd KK |
6089 | p->sysctl_header = register_net_sysctl(net, path, table); |
6090 | if (!p->sysctl_header) | |
6105e293 | 6091 | goto free; |
f68635e6 | 6092 | |
29c994e3 ND |
6093 | if (!strcmp(dev_name, "all")) |
6094 | ifindex = NETCONFA_IFINDEX_ALL; | |
6095 | else if (!strcmp(dev_name, "default")) | |
6096 | ifindex = NETCONFA_IFINDEX_DEFAULT; | |
6097 | else | |
6098 | ifindex = idev->dev->ifindex; | |
6099 | inet6_netconf_notify_devconf(net, NETCONFA_ALL, ifindex, p); | |
95897312 | 6100 | return 0; |
1da177e4 | 6101 | |
f68635e6 | 6102 | free: |
607ea7cd | 6103 | kfree(table); |
f68635e6 | 6104 | out: |
95897312 | 6105 | return -ENOBUFS; |
1da177e4 LT |
6106 | } |
6107 | ||
408c4768 PE |
6108 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
6109 | { | |
607ea7cd | 6110 | struct ctl_table *table; |
408c4768 | 6111 | |
607ea7cd | 6112 | if (!p->sysctl_header) |
408c4768 PE |
6113 | return; |
6114 | ||
607ea7cd KK |
6115 | table = p->sysctl_header->ctl_table_arg; |
6116 | unregister_net_sysctl_table(p->sysctl_header); | |
6117 | p->sysctl_header = NULL; | |
6118 | kfree(table); | |
408c4768 PE |
6119 | } |
6120 | ||
a317a2f1 | 6121 | static int addrconf_sysctl_register(struct inet6_dev *idev) |
f52295a9 | 6122 | { |
a317a2f1 WC |
6123 | int err; |
6124 | ||
6125 | if (!sysctl_dev_name_is_allowed(idev->dev->name)) | |
6126 | return -EINVAL; | |
6127 | ||
6128 | err = neigh_sysctl_register(idev->dev, idev->nd_parms, | |
6129 | &ndisc_ifinfo_sysctl_change); | |
6130 | if (err) | |
6131 | return err; | |
6132 | err = __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, | |
6133 | idev, &idev->cnf); | |
6134 | if (err) | |
6135 | neigh_sysctl_unregister(idev->nd_parms); | |
6136 | ||
6137 | return err; | |
f52295a9 PE |
6138 | } |
6139 | ||
408c4768 | 6140 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4 | 6141 | { |
408c4768 PE |
6142 | __addrconf_sysctl_unregister(&idev->cnf); |
6143 | neigh_sysctl_unregister(idev->nd_parms); | |
1da177e4 LT |
6144 | } |
6145 | ||
6146 | ||
6147 | #endif | |
6148 | ||
2c8c1e72 | 6149 | static int __net_init addrconf_init_net(struct net *net) |
e0da5a48 | 6150 | { |
a79ca223 | 6151 | int err = -ENOMEM; |
e0da5a48 PE |
6152 | struct ipv6_devconf *all, *dflt; |
6153 | ||
a79ca223 | 6154 | all = kmemdup(&ipv6_devconf, sizeof(ipv6_devconf), GFP_KERNEL); |
63159f29 | 6155 | if (!all) |
a79ca223 | 6156 | goto err_alloc_all; |
e0da5a48 | 6157 | |
a79ca223 | 6158 | dflt = kmemdup(&ipv6_devconf_dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); |
63159f29 | 6159 | if (!dflt) |
a79ca223 | 6160 | goto err_alloc_dflt; |
e0da5a48 | 6161 | |
a79ca223 HZ |
6162 | /* these will be inherited by all namespaces */ |
6163 | dflt->autoconf = ipv6_defaults.autoconf; | |
6164 | dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; | |
e0da5a48 | 6165 | |
3d1bec99 HFS |
6166 | dflt->stable_secret.initialized = false; |
6167 | all->stable_secret.initialized = false; | |
6168 | ||
e0da5a48 PE |
6169 | net->ipv6.devconf_all = all; |
6170 | net->ipv6.devconf_dflt = dflt; | |
6171 | ||
6172 | #ifdef CONFIG_SYSCTL | |
f8572d8f | 6173 | err = __addrconf_sysctl_register(net, "all", NULL, all); |
e0da5a48 PE |
6174 | if (err < 0) |
6175 | goto err_reg_all; | |
6176 | ||
f8572d8f | 6177 | err = __addrconf_sysctl_register(net, "default", NULL, dflt); |
e0da5a48 PE |
6178 | if (err < 0) |
6179 | goto err_reg_dflt; | |
6180 | #endif | |
6181 | return 0; | |
6182 | ||
6183 | #ifdef CONFIG_SYSCTL | |
6184 | err_reg_dflt: | |
6185 | __addrconf_sysctl_unregister(all); | |
6186 | err_reg_all: | |
6187 | kfree(dflt); | |
6188 | #endif | |
6189 | err_alloc_dflt: | |
6190 | kfree(all); | |
6191 | err_alloc_all: | |
6192 | return err; | |
6193 | } | |
6194 | ||
2c8c1e72 | 6195 | static void __net_exit addrconf_exit_net(struct net *net) |
e0da5a48 PE |
6196 | { |
6197 | #ifdef CONFIG_SYSCTL | |
6198 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); | |
6199 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); | |
6200 | #endif | |
73cf0e92 | 6201 | kfree(net->ipv6.devconf_dflt); |
6202 | kfree(net->ipv6.devconf_all); | |
e0da5a48 PE |
6203 | } |
6204 | ||
6205 | static struct pernet_operations addrconf_ops = { | |
6206 | .init = addrconf_init_net, | |
6207 | .exit = addrconf_exit_net, | |
6208 | }; | |
6209 | ||
207895fd | 6210 | static struct rtnl_af_ops inet6_ops __read_mostly = { |
b382b191 TG |
6211 | .family = AF_INET6, |
6212 | .fill_link_af = inet6_fill_link_af, | |
6213 | .get_link_af_size = inet6_get_link_af_size, | |
11b1f828 | 6214 | .validate_link_af = inet6_validate_link_af, |
f53adae4 | 6215 | .set_link_af = inet6_set_link_af, |
b382b191 TG |
6216 | }; |
6217 | ||
1da177e4 LT |
6218 | /* |
6219 | * Init / cleanup code | |
6220 | */ | |
6221 | ||
6222 | int __init addrconf_init(void) | |
6223 | { | |
a317a2f1 | 6224 | struct inet6_dev *idev; |
c2e21293 | 6225 | int i, err; |
2a8cc6c8 | 6226 | |
e21e8467 SH |
6227 | err = ipv6_addr_label_init(); |
6228 | if (err < 0) { | |
f3213831 JP |
6229 | pr_crit("%s: cannot initialize default policy table: %d\n", |
6230 | __func__, err); | |
2cc6d2bf | 6231 | goto out; |
2a8cc6c8 | 6232 | } |
1da177e4 | 6233 | |
2cc6d2bf NH |
6234 | err = register_pernet_subsys(&addrconf_ops); |
6235 | if (err < 0) | |
6236 | goto out_addrlabel; | |
e0da5a48 | 6237 | |
c15b1cca HFS |
6238 | addrconf_wq = create_workqueue("ipv6_addrconf"); |
6239 | if (!addrconf_wq) { | |
6240 | err = -ENOMEM; | |
6241 | goto out_nowq; | |
6242 | } | |
6243 | ||
1da177e4 LT |
6244 | /* The addrconf netdev notifier requires that loopback_dev |
6245 | * has it's ipv6 private information allocated and setup | |
6246 | * before it can bring up and give link-local addresses | |
6247 | * to other devices which are up. | |
6248 | * | |
6249 | * Unfortunately, loopback_dev is not necessarily the first | |
6250 | * entry in the global dev_base list of net devices. In fact, | |
6251 | * it is likely to be the very last entry on that list. | |
6252 | * So this causes the notifier registry below to try and | |
6253 | * give link-local addresses to all devices besides loopback_dev | |
6254 | * first, then loopback_dev, which cases all the non-loopback_dev | |
6255 | * devices to fail to get a link-local address. | |
6256 | * | |
6257 | * So, as a temporary fix, allocate the ipv6 structure for | |
6258 | * loopback_dev first by hand. | |
6259 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
6260 | * device and it being up should be removed. | |
6261 | */ | |
6262 | rtnl_lock(); | |
a317a2f1 | 6263 | idev = ipv6_add_dev(init_net.loopback_dev); |
1da177e4 | 6264 | rtnl_unlock(); |
a317a2f1 WC |
6265 | if (IS_ERR(idev)) { |
6266 | err = PTR_ERR(idev); | |
e0da5a48 | 6267 | goto errlo; |
a317a2f1 | 6268 | } |
1da177e4 | 6269 | |
c2e21293 | 6270 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
6271 | INIT_HLIST_HEAD(&inet6_addr_lst[i]); | |
6272 | ||
1da177e4 LT |
6273 | register_netdevice_notifier(&ipv6_dev_notf); |
6274 | ||
c15b1cca | 6275 | addrconf_verify(); |
c127ea2c | 6276 | |
3678a9d8 | 6277 | rtnl_af_register(&inet6_ops); |
b382b191 | 6278 | |
c7ac8679 GR |
6279 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo, |
6280 | NULL); | |
c127ea2c TG |
6281 | if (err < 0) |
6282 | goto errout; | |
6283 | ||
6284 | /* Only the first call to __rtnl_register can fail */ | |
c7ac8679 GR |
6285 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL); |
6286 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL); | |
6287 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, | |
6288 | inet6_dump_ifaddr, NULL); | |
6289 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, | |
6290 | inet6_dump_ifmcaddr, NULL); | |
6291 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, | |
6292 | inet6_dump_ifacaddr, NULL); | |
76f8f6cb | 6293 | __rtnl_register(PF_INET6, RTM_GETNETCONF, inet6_netconf_get_devconf, |
7a674200 | 6294 | inet6_netconf_dump_devconf, NULL); |
c127ea2c | 6295 | |
2a8cc6c8 YH |
6296 | ipv6_addr_label_rtnl_register(); |
6297 | ||
1da177e4 | 6298 | return 0; |
c127ea2c | 6299 | errout: |
b382b191 | 6300 | rtnl_af_unregister(&inet6_ops); |
c127ea2c | 6301 | unregister_netdevice_notifier(&ipv6_dev_notf); |
e0da5a48 | 6302 | errlo: |
c15b1cca HFS |
6303 | destroy_workqueue(addrconf_wq); |
6304 | out_nowq: | |
e0da5a48 | 6305 | unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf NH |
6306 | out_addrlabel: |
6307 | ipv6_addr_label_cleanup(); | |
6308 | out: | |
c127ea2c | 6309 | return err; |
1da177e4 LT |
6310 | } |
6311 | ||
09f7709f | 6312 | void addrconf_cleanup(void) |
1da177e4 | 6313 | { |
176c39af | 6314 | struct net_device *dev; |
1da177e4 LT |
6315 | int i; |
6316 | ||
6317 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 | 6318 | unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf | 6319 | ipv6_addr_label_cleanup(); |
1da177e4 LT |
6320 | |
6321 | rtnl_lock(); | |
6322 | ||
b382b191 TG |
6323 | __rtnl_af_unregister(&inet6_ops); |
6324 | ||
176c39af DL |
6325 | /* clean dev list */ |
6326 | for_each_netdev(&init_net, dev) { | |
6327 | if (__in6_dev_get(dev) == NULL) | |
6328 | continue; | |
6329 | addrconf_ifdown(dev, 1); | |
6330 | } | |
6331 | addrconf_ifdown(init_net.loopback_dev, 2); | |
6332 | ||
1da177e4 LT |
6333 | /* |
6334 | * Check hash table. | |
6335 | */ | |
5c578aed | 6336 | spin_lock_bh(&addrconf_hash_lock); |
c2e21293 | 6337 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
6338 | WARN_ON(!hlist_empty(&inet6_addr_lst[i])); | |
5c578aed | 6339 | spin_unlock_bh(&addrconf_hash_lock); |
c15b1cca | 6340 | cancel_delayed_work(&addr_chk_work); |
1da177e4 | 6341 | rtnl_unlock(); |
c15b1cca HFS |
6342 | |
6343 | destroy_workqueue(addrconf_wq); | |
1da177e4 | 6344 | } |