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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * NET3 IP device support routines. | |
4 | * | |
1da177e4 | 5 | * Derived from the IP parts of dev.c 1.0.19 |
02c30a84 | 6 | * Authors: Ross Biro |
1da177e4 LT |
7 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
8 | * Mark Evans, <evansmp@uhura.aston.ac.uk> | |
9 | * | |
10 | * Additional Authors: | |
11 | * Alan Cox, <gw4pts@gw4pts.ampr.org> | |
12 | * Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> | |
13 | * | |
14 | * Changes: | |
15 | * Alexey Kuznetsov: pa_* fields are replaced with ifaddr | |
16 | * lists. | |
17 | * Cyrus Durgin: updated for kmod | |
18 | * Matthias Andree: in devinet_ioctl, compare label and | |
19 | * address (4.4BSD alias style support), | |
20 | * fall back to comparing just the label | |
21 | * if no match found. | |
22 | */ | |
23 | ||
1da177e4 | 24 | |
7c0f6ba6 | 25 | #include <linux/uaccess.h> |
1da177e4 | 26 | #include <linux/bitops.h> |
4fc268d2 | 27 | #include <linux/capability.h> |
1da177e4 LT |
28 | #include <linux/module.h> |
29 | #include <linux/types.h> | |
30 | #include <linux/kernel.h> | |
174cd4b1 | 31 | #include <linux/sched/signal.h> |
1da177e4 LT |
32 | #include <linux/string.h> |
33 | #include <linux/mm.h> | |
34 | #include <linux/socket.h> | |
35 | #include <linux/sockios.h> | |
36 | #include <linux/in.h> | |
37 | #include <linux/errno.h> | |
38 | #include <linux/interrupt.h> | |
1823730f | 39 | #include <linux/if_addr.h> |
1da177e4 LT |
40 | #include <linux/if_ether.h> |
41 | #include <linux/inet.h> | |
42 | #include <linux/netdevice.h> | |
43 | #include <linux/etherdevice.h> | |
44 | #include <linux/skbuff.h> | |
1da177e4 LT |
45 | #include <linux/init.h> |
46 | #include <linux/notifier.h> | |
47 | #include <linux/inetdevice.h> | |
48 | #include <linux/igmp.h> | |
5a0e3ad6 | 49 | #include <linux/slab.h> |
fd23c3b3 | 50 | #include <linux/hash.h> |
1da177e4 LT |
51 | #ifdef CONFIG_SYSCTL |
52 | #include <linux/sysctl.h> | |
53 | #endif | |
54 | #include <linux/kmod.h> | |
edc9e748 | 55 | #include <linux/netconf.h> |
1da177e4 | 56 | |
14c85021 | 57 | #include <net/arp.h> |
1da177e4 LT |
58 | #include <net/ip.h> |
59 | #include <net/route.h> | |
60 | #include <net/ip_fib.h> | |
63f3444f | 61 | #include <net/rtnetlink.h> |
752d14dc | 62 | #include <net/net_namespace.h> |
5c766d64 | 63 | #include <net/addrconf.h> |
1da177e4 | 64 | |
0027ba84 | 65 | static struct ipv4_devconf ipv4_devconf = { |
42f811b8 | 66 | .data = { |
02291680 EB |
67 | [IPV4_DEVCONF_ACCEPT_REDIRECTS - 1] = 1, |
68 | [IPV4_DEVCONF_SEND_REDIRECTS - 1] = 1, | |
69 | [IPV4_DEVCONF_SECURE_REDIRECTS - 1] = 1, | |
70 | [IPV4_DEVCONF_SHARED_MEDIA - 1] = 1, | |
2690048c WM |
71 | [IPV4_DEVCONF_IGMPV2_UNSOLICITED_REPORT_INTERVAL - 1] = 10000 /*ms*/, |
72 | [IPV4_DEVCONF_IGMPV3_UNSOLICITED_REPORT_INTERVAL - 1] = 1000 /*ms*/, | |
42f811b8 | 73 | }, |
1da177e4 LT |
74 | }; |
75 | ||
76 | static struct ipv4_devconf ipv4_devconf_dflt = { | |
42f811b8 | 77 | .data = { |
02291680 EB |
78 | [IPV4_DEVCONF_ACCEPT_REDIRECTS - 1] = 1, |
79 | [IPV4_DEVCONF_SEND_REDIRECTS - 1] = 1, | |
80 | [IPV4_DEVCONF_SECURE_REDIRECTS - 1] = 1, | |
81 | [IPV4_DEVCONF_SHARED_MEDIA - 1] = 1, | |
82 | [IPV4_DEVCONF_ACCEPT_SOURCE_ROUTE - 1] = 1, | |
2690048c WM |
83 | [IPV4_DEVCONF_IGMPV2_UNSOLICITED_REPORT_INTERVAL - 1] = 10000 /*ms*/, |
84 | [IPV4_DEVCONF_IGMPV3_UNSOLICITED_REPORT_INTERVAL - 1] = 1000 /*ms*/, | |
42f811b8 | 85 | }, |
1da177e4 LT |
86 | }; |
87 | ||
9355bbd6 PE |
88 | #define IPV4_DEVCONF_DFLT(net, attr) \ |
89 | IPV4_DEVCONF((*net->ipv4.devconf_dflt), attr) | |
42f811b8 | 90 | |
ef7c79ed | 91 | static const struct nla_policy ifa_ipv4_policy[IFA_MAX+1] = { |
5c753978 TG |
92 | [IFA_LOCAL] = { .type = NLA_U32 }, |
93 | [IFA_ADDRESS] = { .type = NLA_U32 }, | |
94 | [IFA_BROADCAST] = { .type = NLA_U32 }, | |
5176f91e | 95 | [IFA_LABEL] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, |
5c766d64 | 96 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, |
ad6c8135 | 97 | [IFA_FLAGS] = { .type = NLA_U32 }, |
af4d768a | 98 | [IFA_RT_PRIORITY] = { .type = NLA_U32 }, |
d3807145 | 99 | [IFA_TARGET_NETNSID] = { .type = NLA_S32 }, |
5c753978 TG |
100 | }; |
101 | ||
978a46fa CB |
102 | struct inet_fill_args { |
103 | u32 portid; | |
104 | u32 seq; | |
105 | int event; | |
106 | unsigned int flags; | |
107 | int netnsid; | |
5fcd266a | 108 | int ifindex; |
978a46fa CB |
109 | }; |
110 | ||
40384999 ED |
111 | #define IN4_ADDR_HSIZE_SHIFT 8 |
112 | #define IN4_ADDR_HSIZE (1U << IN4_ADDR_HSIZE_SHIFT) | |
113 | ||
fd23c3b3 | 114 | static struct hlist_head inet_addr_lst[IN4_ADDR_HSIZE]; |
fd23c3b3 | 115 | |
6eada011 | 116 | static u32 inet_addr_hash(const struct net *net, __be32 addr) |
fd23c3b3 | 117 | { |
40384999 | 118 | u32 val = (__force u32) addr ^ net_hash_mix(net); |
fd23c3b3 | 119 | |
40384999 | 120 | return hash_32(val, IN4_ADDR_HSIZE_SHIFT); |
fd23c3b3 DM |
121 | } |
122 | ||
123 | static void inet_hash_insert(struct net *net, struct in_ifaddr *ifa) | |
124 | { | |
40384999 | 125 | u32 hash = inet_addr_hash(net, ifa->ifa_local); |
fd23c3b3 | 126 | |
32a4be48 | 127 | ASSERT_RTNL(); |
fd23c3b3 | 128 | hlist_add_head_rcu(&ifa->hash, &inet_addr_lst[hash]); |
fd23c3b3 DM |
129 | } |
130 | ||
131 | static void inet_hash_remove(struct in_ifaddr *ifa) | |
132 | { | |
32a4be48 | 133 | ASSERT_RTNL(); |
fd23c3b3 | 134 | hlist_del_init_rcu(&ifa->hash); |
fd23c3b3 DM |
135 | } |
136 | ||
9435eb1c DM |
137 | /** |
138 | * __ip_dev_find - find the first device with a given source address. | |
139 | * @net: the net namespace | |
140 | * @addr: the source address | |
141 | * @devref: if true, take a reference on the found device | |
142 | * | |
143 | * If a caller uses devref=false, it should be protected by RCU, or RTNL | |
144 | */ | |
145 | struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref) | |
146 | { | |
9435eb1c DM |
147 | struct net_device *result = NULL; |
148 | struct in_ifaddr *ifa; | |
9435eb1c DM |
149 | |
150 | rcu_read_lock(); | |
6e617de8 PA |
151 | ifa = inet_lookup_ifaddr_rcu(net, addr); |
152 | if (!ifa) { | |
406b6f97 DM |
153 | struct flowi4 fl4 = { .daddr = addr }; |
154 | struct fib_result res = { 0 }; | |
155 | struct fib_table *local; | |
156 | ||
157 | /* Fallback to FIB local table so that communication | |
158 | * over loopback subnets work. | |
159 | */ | |
160 | local = fib_get_table(net, RT_TABLE_LOCAL); | |
161 | if (local && | |
162 | !fib_table_lookup(local, &fl4, &res, FIB_LOOKUP_NOREF) && | |
163 | res.type == RTN_LOCAL) | |
164 | result = FIB_RES_DEV(res); | |
6e617de8 PA |
165 | } else { |
166 | result = ifa->ifa_dev->dev; | |
406b6f97 | 167 | } |
9435eb1c DM |
168 | if (result && devref) |
169 | dev_hold(result); | |
170 | rcu_read_unlock(); | |
171 | return result; | |
172 | } | |
173 | EXPORT_SYMBOL(__ip_dev_find); | |
174 | ||
6e617de8 PA |
175 | /* called under RCU lock */ |
176 | struct in_ifaddr *inet_lookup_ifaddr_rcu(struct net *net, __be32 addr) | |
177 | { | |
178 | u32 hash = inet_addr_hash(net, addr); | |
179 | struct in_ifaddr *ifa; | |
180 | ||
181 | hlist_for_each_entry_rcu(ifa, &inet_addr_lst[hash], hash) | |
182 | if (ifa->ifa_local == addr && | |
183 | net_eq(dev_net(ifa->ifa_dev->dev), net)) | |
184 | return ifa; | |
185 | ||
186 | return NULL; | |
187 | } | |
188 | ||
d6062cbb | 189 | static void rtmsg_ifa(int event, struct in_ifaddr *, struct nlmsghdr *, u32); |
1da177e4 | 190 | |
e041c683 | 191 | static BLOCKING_NOTIFIER_HEAD(inetaddr_chain); |
3ad7d246 | 192 | static BLOCKING_NOTIFIER_HEAD(inetaddr_validator_chain); |
1da177e4 LT |
193 | static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, |
194 | int destroy); | |
195 | #ifdef CONFIG_SYSCTL | |
20e61da7 | 196 | static int devinet_sysctl_register(struct in_device *idev); |
51602b2a PE |
197 | static void devinet_sysctl_unregister(struct in_device *idev); |
198 | #else | |
20e61da7 | 199 | static int devinet_sysctl_register(struct in_device *idev) |
51602b2a | 200 | { |
20e61da7 | 201 | return 0; |
51602b2a | 202 | } |
40384999 | 203 | static void devinet_sysctl_unregister(struct in_device *idev) |
51602b2a PE |
204 | { |
205 | } | |
1da177e4 LT |
206 | #endif |
207 | ||
208 | /* Locks all the inet devices. */ | |
209 | ||
210 | static struct in_ifaddr *inet_alloc_ifa(void) | |
211 | { | |
93adcc80 | 212 | return kzalloc(sizeof(struct in_ifaddr), GFP_KERNEL); |
1da177e4 LT |
213 | } |
214 | ||
215 | static void inet_rcu_free_ifa(struct rcu_head *head) | |
216 | { | |
217 | struct in_ifaddr *ifa = container_of(head, struct in_ifaddr, rcu_head); | |
218 | if (ifa->ifa_dev) | |
219 | in_dev_put(ifa->ifa_dev); | |
220 | kfree(ifa); | |
221 | } | |
222 | ||
40384999 | 223 | static void inet_free_ifa(struct in_ifaddr *ifa) |
1da177e4 LT |
224 | { |
225 | call_rcu(&ifa->rcu_head, inet_rcu_free_ifa); | |
226 | } | |
227 | ||
228 | void in_dev_finish_destroy(struct in_device *idev) | |
229 | { | |
230 | struct net_device *dev = idev->dev; | |
231 | ||
547b792c IJ |
232 | WARN_ON(idev->ifa_list); |
233 | WARN_ON(idev->mc_list); | |
e9897071 | 234 | kfree(rcu_dereference_protected(idev->mc_hash, 1)); |
1da177e4 | 235 | #ifdef NET_REFCNT_DEBUG |
91df42be | 236 | pr_debug("%s: %p=%s\n", __func__, idev, dev ? dev->name : "NIL"); |
1da177e4 LT |
237 | #endif |
238 | dev_put(dev); | |
239 | if (!idev->dead) | |
9f9354b9 ED |
240 | pr_err("Freeing alive in_device %p\n", idev); |
241 | else | |
1da177e4 | 242 | kfree(idev); |
1da177e4 | 243 | } |
9f9354b9 | 244 | EXPORT_SYMBOL(in_dev_finish_destroy); |
1da177e4 | 245 | |
71e27da9 | 246 | static struct in_device *inetdev_init(struct net_device *dev) |
1da177e4 LT |
247 | { |
248 | struct in_device *in_dev; | |
20e61da7 | 249 | int err = -ENOMEM; |
1da177e4 LT |
250 | |
251 | ASSERT_RTNL(); | |
252 | ||
0da974f4 | 253 | in_dev = kzalloc(sizeof(*in_dev), GFP_KERNEL); |
1da177e4 LT |
254 | if (!in_dev) |
255 | goto out; | |
c346dca1 | 256 | memcpy(&in_dev->cnf, dev_net(dev)->ipv4.devconf_dflt, |
9355bbd6 | 257 | sizeof(in_dev->cnf)); |
1da177e4 LT |
258 | in_dev->cnf.sysctl = NULL; |
259 | in_dev->dev = dev; | |
9f9354b9 ED |
260 | in_dev->arp_parms = neigh_parms_alloc(dev, &arp_tbl); |
261 | if (!in_dev->arp_parms) | |
1da177e4 | 262 | goto out_kfree; |
0187bdfb BH |
263 | if (IPV4_DEVCONF(in_dev->cnf, FORWARDING)) |
264 | dev_disable_lro(dev); | |
1da177e4 LT |
265 | /* Reference in_dev->dev */ |
266 | dev_hold(dev); | |
30c4cf57 | 267 | /* Account for reference dev->ip_ptr (below) */ |
7658b36f | 268 | refcount_set(&in_dev->refcnt, 1); |
1da177e4 | 269 | |
20e61da7 WC |
270 | err = devinet_sysctl_register(in_dev); |
271 | if (err) { | |
272 | in_dev->dead = 1; | |
273 | in_dev_put(in_dev); | |
274 | in_dev = NULL; | |
275 | goto out; | |
276 | } | |
1da177e4 LT |
277 | ip_mc_init_dev(in_dev); |
278 | if (dev->flags & IFF_UP) | |
279 | ip_mc_up(in_dev); | |
483479ec | 280 | |
30c4cf57 | 281 | /* we can receive as soon as ip_ptr is set -- do this last */ |
cf778b00 | 282 | rcu_assign_pointer(dev->ip_ptr, in_dev); |
483479ec | 283 | out: |
20e61da7 | 284 | return in_dev ?: ERR_PTR(err); |
1da177e4 LT |
285 | out_kfree: |
286 | kfree(in_dev); | |
287 | in_dev = NULL; | |
288 | goto out; | |
289 | } | |
290 | ||
291 | static void in_dev_rcu_put(struct rcu_head *head) | |
292 | { | |
293 | struct in_device *idev = container_of(head, struct in_device, rcu_head); | |
294 | in_dev_put(idev); | |
295 | } | |
296 | ||
297 | static void inetdev_destroy(struct in_device *in_dev) | |
298 | { | |
299 | struct in_ifaddr *ifa; | |
300 | struct net_device *dev; | |
301 | ||
302 | ASSERT_RTNL(); | |
303 | ||
304 | dev = in_dev->dev; | |
1da177e4 LT |
305 | |
306 | in_dev->dead = 1; | |
307 | ||
308 | ip_mc_destroy_dev(in_dev); | |
309 | ||
310 | while ((ifa = in_dev->ifa_list) != NULL) { | |
311 | inet_del_ifa(in_dev, &in_dev->ifa_list, 0); | |
312 | inet_free_ifa(ifa); | |
313 | } | |
314 | ||
a9b3cd7f | 315 | RCU_INIT_POINTER(dev->ip_ptr, NULL); |
1da177e4 | 316 | |
51602b2a | 317 | devinet_sysctl_unregister(in_dev); |
1da177e4 LT |
318 | neigh_parms_release(&arp_tbl, in_dev->arp_parms); |
319 | arp_ifdown(dev); | |
320 | ||
321 | call_rcu(&in_dev->rcu_head, in_dev_rcu_put); | |
322 | } | |
323 | ||
ff428d72 | 324 | int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b) |
1da177e4 LT |
325 | { |
326 | rcu_read_lock(); | |
327 | for_primary_ifa(in_dev) { | |
328 | if (inet_ifa_match(a, ifa)) { | |
329 | if (!b || inet_ifa_match(b, ifa)) { | |
330 | rcu_read_unlock(); | |
331 | return 1; | |
332 | } | |
333 | } | |
334 | } endfor_ifa(in_dev); | |
335 | rcu_read_unlock(); | |
336 | return 0; | |
337 | } | |
338 | ||
d6062cbb | 339 | static void __inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, |
15e47304 | 340 | int destroy, struct nlmsghdr *nlh, u32 portid) |
1da177e4 | 341 | { |
8f937c60 | 342 | struct in_ifaddr *promote = NULL; |
0ff60a45 JHS |
343 | struct in_ifaddr *ifa, *ifa1 = *ifap; |
344 | struct in_ifaddr *last_prim = in_dev->ifa_list; | |
345 | struct in_ifaddr *prev_prom = NULL; | |
346 | int do_promote = IN_DEV_PROMOTE_SECONDARIES(in_dev); | |
1da177e4 LT |
347 | |
348 | ASSERT_RTNL(); | |
349 | ||
fbd40ea0 DM |
350 | if (in_dev->dead) |
351 | goto no_promotions; | |
352 | ||
e905a9ed | 353 | /* 1. Deleting primary ifaddr forces deletion all secondaries |
8f937c60 HW |
354 | * unless alias promotion is set |
355 | **/ | |
1da177e4 LT |
356 | |
357 | if (!(ifa1->ifa_flags & IFA_F_SECONDARY)) { | |
1da177e4 LT |
358 | struct in_ifaddr **ifap1 = &ifa1->ifa_next; |
359 | ||
360 | while ((ifa = *ifap1) != NULL) { | |
e905a9ed | 361 | if (!(ifa->ifa_flags & IFA_F_SECONDARY) && |
0ff60a45 JHS |
362 | ifa1->ifa_scope <= ifa->ifa_scope) |
363 | last_prim = ifa; | |
364 | ||
1da177e4 LT |
365 | if (!(ifa->ifa_flags & IFA_F_SECONDARY) || |
366 | ifa1->ifa_mask != ifa->ifa_mask || | |
367 | !inet_ifa_match(ifa1->ifa_address, ifa)) { | |
368 | ifap1 = &ifa->ifa_next; | |
0ff60a45 | 369 | prev_prom = ifa; |
1da177e4 LT |
370 | continue; |
371 | } | |
372 | ||
0ff60a45 | 373 | if (!do_promote) { |
fd23c3b3 | 374 | inet_hash_remove(ifa); |
8f937c60 | 375 | *ifap1 = ifa->ifa_next; |
1da177e4 | 376 | |
15e47304 | 377 | rtmsg_ifa(RTM_DELADDR, ifa, nlh, portid); |
e041c683 AS |
378 | blocking_notifier_call_chain(&inetaddr_chain, |
379 | NETDEV_DOWN, ifa); | |
8f937c60 HW |
380 | inet_free_ifa(ifa); |
381 | } else { | |
382 | promote = ifa; | |
383 | break; | |
384 | } | |
1da177e4 LT |
385 | } |
386 | } | |
387 | ||
2d230e2b JA |
388 | /* On promotion all secondaries from subnet are changing |
389 | * the primary IP, we must remove all their routes silently | |
390 | * and later to add them back with new prefsrc. Do this | |
391 | * while all addresses are on the device list. | |
392 | */ | |
393 | for (ifa = promote; ifa; ifa = ifa->ifa_next) { | |
394 | if (ifa1->ifa_mask == ifa->ifa_mask && | |
395 | inet_ifa_match(ifa1->ifa_address, ifa)) | |
396 | fib_del_ifaddr(ifa, ifa1); | |
397 | } | |
398 | ||
fbd40ea0 | 399 | no_promotions: |
1da177e4 LT |
400 | /* 2. Unlink it */ |
401 | ||
402 | *ifap = ifa1->ifa_next; | |
fd23c3b3 | 403 | inet_hash_remove(ifa1); |
1da177e4 LT |
404 | |
405 | /* 3. Announce address deletion */ | |
406 | ||
407 | /* Send message first, then call notifier. | |
408 | At first sight, FIB update triggered by notifier | |
409 | will refer to already deleted ifaddr, that could confuse | |
410 | netlink listeners. It is not true: look, gated sees | |
411 | that route deleted and if it still thinks that ifaddr | |
412 | is valid, it will try to restore deleted routes... Grr. | |
413 | So that, this order is correct. | |
414 | */ | |
15e47304 | 415 | rtmsg_ifa(RTM_DELADDR, ifa1, nlh, portid); |
e041c683 | 416 | blocking_notifier_call_chain(&inetaddr_chain, NETDEV_DOWN, ifa1); |
1da177e4 | 417 | |
0ff60a45 | 418 | if (promote) { |
04024b93 | 419 | struct in_ifaddr *next_sec = promote->ifa_next; |
0ff60a45 JHS |
420 | |
421 | if (prev_prom) { | |
422 | prev_prom->ifa_next = promote->ifa_next; | |
423 | promote->ifa_next = last_prim->ifa_next; | |
424 | last_prim->ifa_next = promote; | |
425 | } | |
8f937c60 | 426 | |
8f937c60 | 427 | promote->ifa_flags &= ~IFA_F_SECONDARY; |
15e47304 | 428 | rtmsg_ifa(RTM_NEWADDR, promote, nlh, portid); |
e041c683 AS |
429 | blocking_notifier_call_chain(&inetaddr_chain, |
430 | NETDEV_UP, promote); | |
04024b93 | 431 | for (ifa = next_sec; ifa; ifa = ifa->ifa_next) { |
0ff60a45 JHS |
432 | if (ifa1->ifa_mask != ifa->ifa_mask || |
433 | !inet_ifa_match(ifa1->ifa_address, ifa)) | |
434 | continue; | |
435 | fib_add_ifaddr(ifa); | |
436 | } | |
437 | ||
438 | } | |
6363097c | 439 | if (destroy) |
0ff60a45 | 440 | inet_free_ifa(ifa1); |
1da177e4 LT |
441 | } |
442 | ||
d6062cbb TG |
443 | static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, |
444 | int destroy) | |
445 | { | |
446 | __inet_del_ifa(in_dev, ifap, destroy, NULL, 0); | |
447 | } | |
448 | ||
5c766d64 JP |
449 | static void check_lifetime(struct work_struct *work); |
450 | ||
451 | static DECLARE_DELAYED_WORK(check_lifetime_work, check_lifetime); | |
452 | ||
d6062cbb | 453 | static int __inet_insert_ifa(struct in_ifaddr *ifa, struct nlmsghdr *nlh, |
de95e047 | 454 | u32 portid, struct netlink_ext_ack *extack) |
1da177e4 LT |
455 | { |
456 | struct in_device *in_dev = ifa->ifa_dev; | |
457 | struct in_ifaddr *ifa1, **ifap, **last_primary; | |
3ad7d246 KJ |
458 | struct in_validator_info ivi; |
459 | int ret; | |
1da177e4 LT |
460 | |
461 | ASSERT_RTNL(); | |
462 | ||
463 | if (!ifa->ifa_local) { | |
464 | inet_free_ifa(ifa); | |
465 | return 0; | |
466 | } | |
467 | ||
468 | ifa->ifa_flags &= ~IFA_F_SECONDARY; | |
469 | last_primary = &in_dev->ifa_list; | |
470 | ||
471 | for (ifap = &in_dev->ifa_list; (ifa1 = *ifap) != NULL; | |
472 | ifap = &ifa1->ifa_next) { | |
473 | if (!(ifa1->ifa_flags & IFA_F_SECONDARY) && | |
474 | ifa->ifa_scope <= ifa1->ifa_scope) | |
475 | last_primary = &ifa1->ifa_next; | |
476 | if (ifa1->ifa_mask == ifa->ifa_mask && | |
477 | inet_ifa_match(ifa1->ifa_address, ifa)) { | |
478 | if (ifa1->ifa_local == ifa->ifa_local) { | |
479 | inet_free_ifa(ifa); | |
480 | return -EEXIST; | |
481 | } | |
482 | if (ifa1->ifa_scope != ifa->ifa_scope) { | |
483 | inet_free_ifa(ifa); | |
484 | return -EINVAL; | |
485 | } | |
486 | ifa->ifa_flags |= IFA_F_SECONDARY; | |
487 | } | |
488 | } | |
489 | ||
3ad7d246 KJ |
490 | /* Allow any devices that wish to register ifaddr validtors to weigh |
491 | * in now, before changes are committed. The rntl lock is serializing | |
492 | * access here, so the state should not change between a validator call | |
493 | * and a final notify on commit. This isn't invoked on promotion under | |
494 | * the assumption that validators are checking the address itself, and | |
495 | * not the flags. | |
496 | */ | |
497 | ivi.ivi_addr = ifa->ifa_address; | |
498 | ivi.ivi_dev = ifa->ifa_dev; | |
de95e047 | 499 | ivi.extack = extack; |
3ad7d246 KJ |
500 | ret = blocking_notifier_call_chain(&inetaddr_validator_chain, |
501 | NETDEV_UP, &ivi); | |
502 | ret = notifier_to_errno(ret); | |
503 | if (ret) { | |
504 | inet_free_ifa(ifa); | |
505 | return ret; | |
506 | } | |
507 | ||
1da177e4 | 508 | if (!(ifa->ifa_flags & IFA_F_SECONDARY)) { |
63862b5b | 509 | prandom_seed((__force u32) ifa->ifa_local); |
1da177e4 LT |
510 | ifap = last_primary; |
511 | } | |
512 | ||
513 | ifa->ifa_next = *ifap; | |
514 | *ifap = ifa; | |
515 | ||
fd23c3b3 DM |
516 | inet_hash_insert(dev_net(in_dev->dev), ifa); |
517 | ||
5c766d64 | 518 | cancel_delayed_work(&check_lifetime_work); |
906e073f | 519 | queue_delayed_work(system_power_efficient_wq, &check_lifetime_work, 0); |
5c766d64 | 520 | |
1da177e4 LT |
521 | /* Send message first, then call notifier. |
522 | Notifier will trigger FIB update, so that | |
523 | listeners of netlink will know about new ifaddr */ | |
15e47304 | 524 | rtmsg_ifa(RTM_NEWADDR, ifa, nlh, portid); |
e041c683 | 525 | blocking_notifier_call_chain(&inetaddr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
526 | |
527 | return 0; | |
528 | } | |
529 | ||
d6062cbb TG |
530 | static int inet_insert_ifa(struct in_ifaddr *ifa) |
531 | { | |
de95e047 | 532 | return __inet_insert_ifa(ifa, NULL, 0, NULL); |
d6062cbb TG |
533 | } |
534 | ||
1da177e4 LT |
535 | static int inet_set_ifa(struct net_device *dev, struct in_ifaddr *ifa) |
536 | { | |
e5ed6399 | 537 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
538 | |
539 | ASSERT_RTNL(); | |
540 | ||
541 | if (!in_dev) { | |
71e27da9 HX |
542 | inet_free_ifa(ifa); |
543 | return -ENOBUFS; | |
1da177e4 | 544 | } |
71e27da9 | 545 | ipv4_devconf_setall(in_dev); |
1d4c8c29 | 546 | neigh_parms_data_state_setall(in_dev->arp_parms); |
1da177e4 | 547 | if (ifa->ifa_dev != in_dev) { |
547b792c | 548 | WARN_ON(ifa->ifa_dev); |
1da177e4 LT |
549 | in_dev_hold(in_dev); |
550 | ifa->ifa_dev = in_dev; | |
551 | } | |
f97c1e0c | 552 | if (ipv4_is_loopback(ifa->ifa_local)) |
1da177e4 LT |
553 | ifa->ifa_scope = RT_SCOPE_HOST; |
554 | return inet_insert_ifa(ifa); | |
555 | } | |
556 | ||
8723e1b4 ED |
557 | /* Caller must hold RCU or RTNL : |
558 | * We dont take a reference on found in_device | |
559 | */ | |
7fee0ca2 | 560 | struct in_device *inetdev_by_index(struct net *net, int ifindex) |
1da177e4 LT |
561 | { |
562 | struct net_device *dev; | |
563 | struct in_device *in_dev = NULL; | |
c148fc2e ED |
564 | |
565 | rcu_read_lock(); | |
566 | dev = dev_get_by_index_rcu(net, ifindex); | |
1da177e4 | 567 | if (dev) |
8723e1b4 | 568 | in_dev = rcu_dereference_rtnl(dev->ip_ptr); |
c148fc2e | 569 | rcu_read_unlock(); |
1da177e4 LT |
570 | return in_dev; |
571 | } | |
9f9354b9 | 572 | EXPORT_SYMBOL(inetdev_by_index); |
1da177e4 LT |
573 | |
574 | /* Called only from RTNL semaphored context. No locks. */ | |
575 | ||
60cad5da AV |
576 | struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, |
577 | __be32 mask) | |
1da177e4 LT |
578 | { |
579 | ASSERT_RTNL(); | |
580 | ||
581 | for_primary_ifa(in_dev) { | |
582 | if (ifa->ifa_mask == mask && inet_ifa_match(prefix, ifa)) | |
583 | return ifa; | |
584 | } endfor_ifa(in_dev); | |
585 | return NULL; | |
586 | } | |
587 | ||
93a714d6 MC |
588 | static int ip_mc_config(struct sock *sk, bool join, const struct in_ifaddr *ifa) |
589 | { | |
590 | struct ip_mreqn mreq = { | |
591 | .imr_multiaddr.s_addr = ifa->ifa_address, | |
592 | .imr_ifindex = ifa->ifa_dev->dev->ifindex, | |
593 | }; | |
594 | int ret; | |
595 | ||
596 | ASSERT_RTNL(); | |
597 | ||
598 | lock_sock(sk); | |
599 | if (join) | |
54ff9ef3 | 600 | ret = ip_mc_join_group(sk, &mreq); |
93a714d6 | 601 | else |
54ff9ef3 | 602 | ret = ip_mc_leave_group(sk, &mreq); |
93a714d6 MC |
603 | release_sock(sk); |
604 | ||
605 | return ret; | |
606 | } | |
607 | ||
c21ef3e3 DA |
608 | static int inet_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, |
609 | struct netlink_ext_ack *extack) | |
1da177e4 | 610 | { |
3b1e0a65 | 611 | struct net *net = sock_net(skb->sk); |
dfdd5fd4 | 612 | struct nlattr *tb[IFA_MAX+1]; |
1da177e4 | 613 | struct in_device *in_dev; |
dfdd5fd4 | 614 | struct ifaddrmsg *ifm; |
1da177e4 | 615 | struct in_ifaddr *ifa, **ifap; |
dfdd5fd4 | 616 | int err = -EINVAL; |
1da177e4 LT |
617 | |
618 | ASSERT_RTNL(); | |
619 | ||
8cb08174 JB |
620 | err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFA_MAX, |
621 | ifa_ipv4_policy, extack); | |
dfdd5fd4 TG |
622 | if (err < 0) |
623 | goto errout; | |
624 | ||
625 | ifm = nlmsg_data(nlh); | |
7fee0ca2 | 626 | in_dev = inetdev_by_index(net, ifm->ifa_index); |
51456b29 | 627 | if (!in_dev) { |
dfdd5fd4 TG |
628 | err = -ENODEV; |
629 | goto errout; | |
630 | } | |
631 | ||
1da177e4 LT |
632 | for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL; |
633 | ifap = &ifa->ifa_next) { | |
dfdd5fd4 | 634 | if (tb[IFA_LOCAL] && |
67b61f6c | 635 | ifa->ifa_local != nla_get_in_addr(tb[IFA_LOCAL])) |
dfdd5fd4 TG |
636 | continue; |
637 | ||
638 | if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label)) | |
1da177e4 | 639 | continue; |
dfdd5fd4 TG |
640 | |
641 | if (tb[IFA_ADDRESS] && | |
642 | (ifm->ifa_prefixlen != ifa->ifa_prefixlen || | |
67b61f6c | 643 | !inet_ifa_match(nla_get_in_addr(tb[IFA_ADDRESS]), ifa))) |
dfdd5fd4 TG |
644 | continue; |
645 | ||
93a714d6 MC |
646 | if (ipv4_is_multicast(ifa->ifa_address)) |
647 | ip_mc_config(net->ipv4.mc_autojoin_sk, false, ifa); | |
15e47304 | 648 | __inet_del_ifa(in_dev, ifap, 1, nlh, NETLINK_CB(skb).portid); |
1da177e4 LT |
649 | return 0; |
650 | } | |
dfdd5fd4 TG |
651 | |
652 | err = -EADDRNOTAVAIL; | |
653 | errout: | |
654 | return err; | |
1da177e4 LT |
655 | } |
656 | ||
5c766d64 JP |
657 | #define INFINITY_LIFE_TIME 0xFFFFFFFF |
658 | ||
659 | static void check_lifetime(struct work_struct *work) | |
660 | { | |
661 | unsigned long now, next, next_sec, next_sched; | |
662 | struct in_ifaddr *ifa; | |
c988d1e8 | 663 | struct hlist_node *n; |
5c766d64 JP |
664 | int i; |
665 | ||
666 | now = jiffies; | |
667 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); | |
668 | ||
5c766d64 | 669 | for (i = 0; i < IN4_ADDR_HSIZE; i++) { |
c988d1e8 JP |
670 | bool change_needed = false; |
671 | ||
672 | rcu_read_lock(); | |
b67bfe0d | 673 | hlist_for_each_entry_rcu(ifa, &inet_addr_lst[i], hash) { |
5c766d64 JP |
674 | unsigned long age; |
675 | ||
676 | if (ifa->ifa_flags & IFA_F_PERMANENT) | |
677 | continue; | |
678 | ||
679 | /* We try to batch several events at once. */ | |
680 | age = (now - ifa->ifa_tstamp + | |
681 | ADDRCONF_TIMER_FUZZ_MINUS) / HZ; | |
682 | ||
683 | if (ifa->ifa_valid_lft != INFINITY_LIFE_TIME && | |
684 | age >= ifa->ifa_valid_lft) { | |
c988d1e8 | 685 | change_needed = true; |
5c766d64 JP |
686 | } else if (ifa->ifa_preferred_lft == |
687 | INFINITY_LIFE_TIME) { | |
688 | continue; | |
689 | } else if (age >= ifa->ifa_preferred_lft) { | |
690 | if (time_before(ifa->ifa_tstamp + | |
691 | ifa->ifa_valid_lft * HZ, next)) | |
692 | next = ifa->ifa_tstamp + | |
693 | ifa->ifa_valid_lft * HZ; | |
694 | ||
c988d1e8 JP |
695 | if (!(ifa->ifa_flags & IFA_F_DEPRECATED)) |
696 | change_needed = true; | |
5c766d64 JP |
697 | } else if (time_before(ifa->ifa_tstamp + |
698 | ifa->ifa_preferred_lft * HZ, | |
699 | next)) { | |
700 | next = ifa->ifa_tstamp + | |
701 | ifa->ifa_preferred_lft * HZ; | |
702 | } | |
703 | } | |
c988d1e8 JP |
704 | rcu_read_unlock(); |
705 | if (!change_needed) | |
706 | continue; | |
707 | rtnl_lock(); | |
708 | hlist_for_each_entry_safe(ifa, n, &inet_addr_lst[i], hash) { | |
709 | unsigned long age; | |
710 | ||
711 | if (ifa->ifa_flags & IFA_F_PERMANENT) | |
712 | continue; | |
713 | ||
714 | /* We try to batch several events at once. */ | |
715 | age = (now - ifa->ifa_tstamp + | |
716 | ADDRCONF_TIMER_FUZZ_MINUS) / HZ; | |
717 | ||
718 | if (ifa->ifa_valid_lft != INFINITY_LIFE_TIME && | |
719 | age >= ifa->ifa_valid_lft) { | |
720 | struct in_ifaddr **ifap; | |
721 | ||
722 | for (ifap = &ifa->ifa_dev->ifa_list; | |
723 | *ifap != NULL; ifap = &(*ifap)->ifa_next) { | |
724 | if (*ifap == ifa) { | |
725 | inet_del_ifa(ifa->ifa_dev, | |
726 | ifap, 1); | |
727 | break; | |
728 | } | |
729 | } | |
730 | } else if (ifa->ifa_preferred_lft != | |
731 | INFINITY_LIFE_TIME && | |
732 | age >= ifa->ifa_preferred_lft && | |
733 | !(ifa->ifa_flags & IFA_F_DEPRECATED)) { | |
734 | ifa->ifa_flags |= IFA_F_DEPRECATED; | |
735 | rtmsg_ifa(RTM_NEWADDR, ifa, NULL, 0); | |
736 | } | |
737 | } | |
738 | rtnl_unlock(); | |
5c766d64 | 739 | } |
5c766d64 JP |
740 | |
741 | next_sec = round_jiffies_up(next); | |
742 | next_sched = next; | |
743 | ||
744 | /* If rounded timeout is accurate enough, accept it. */ | |
745 | if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) | |
746 | next_sched = next_sec; | |
747 | ||
748 | now = jiffies; | |
749 | /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ | |
750 | if (time_before(next_sched, now + ADDRCONF_TIMER_FUZZ_MAX)) | |
751 | next_sched = now + ADDRCONF_TIMER_FUZZ_MAX; | |
752 | ||
906e073f VK |
753 | queue_delayed_work(system_power_efficient_wq, &check_lifetime_work, |
754 | next_sched - now); | |
5c766d64 JP |
755 | } |
756 | ||
757 | static void set_ifa_lifetime(struct in_ifaddr *ifa, __u32 valid_lft, | |
758 | __u32 prefered_lft) | |
759 | { | |
760 | unsigned long timeout; | |
761 | ||
762 | ifa->ifa_flags &= ~(IFA_F_PERMANENT | IFA_F_DEPRECATED); | |
763 | ||
764 | timeout = addrconf_timeout_fixup(valid_lft, HZ); | |
765 | if (addrconf_finite_timeout(timeout)) | |
766 | ifa->ifa_valid_lft = timeout; | |
767 | else | |
768 | ifa->ifa_flags |= IFA_F_PERMANENT; | |
769 | ||
770 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); | |
771 | if (addrconf_finite_timeout(timeout)) { | |
772 | if (timeout == 0) | |
773 | ifa->ifa_flags |= IFA_F_DEPRECATED; | |
774 | ifa->ifa_preferred_lft = timeout; | |
775 | } | |
776 | ifa->ifa_tstamp = jiffies; | |
777 | if (!ifa->ifa_cstamp) | |
778 | ifa->ifa_cstamp = ifa->ifa_tstamp; | |
779 | } | |
780 | ||
781 | static struct in_ifaddr *rtm_to_ifaddr(struct net *net, struct nlmsghdr *nlh, | |
dac9c979 DA |
782 | __u32 *pvalid_lft, __u32 *pprefered_lft, |
783 | struct netlink_ext_ack *extack) | |
1da177e4 | 784 | { |
5c753978 TG |
785 | struct nlattr *tb[IFA_MAX+1]; |
786 | struct in_ifaddr *ifa; | |
787 | struct ifaddrmsg *ifm; | |
1da177e4 LT |
788 | struct net_device *dev; |
789 | struct in_device *in_dev; | |
7b218574 | 790 | int err; |
1da177e4 | 791 | |
8cb08174 JB |
792 | err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFA_MAX, |
793 | ifa_ipv4_policy, extack); | |
5c753978 TG |
794 | if (err < 0) |
795 | goto errout; | |
1da177e4 | 796 | |
5c753978 | 797 | ifm = nlmsg_data(nlh); |
7b218574 | 798 | err = -EINVAL; |
51456b29 | 799 | if (ifm->ifa_prefixlen > 32 || !tb[IFA_LOCAL]) |
5c753978 | 800 | goto errout; |
1da177e4 | 801 | |
4b8aa9ab | 802 | dev = __dev_get_by_index(net, ifm->ifa_index); |
7b218574 | 803 | err = -ENODEV; |
51456b29 | 804 | if (!dev) |
5c753978 | 805 | goto errout; |
1da177e4 | 806 | |
5c753978 | 807 | in_dev = __in_dev_get_rtnl(dev); |
7b218574 | 808 | err = -ENOBUFS; |
51456b29 | 809 | if (!in_dev) |
71e27da9 | 810 | goto errout; |
1da177e4 | 811 | |
5c753978 | 812 | ifa = inet_alloc_ifa(); |
51456b29 | 813 | if (!ifa) |
5c753978 TG |
814 | /* |
815 | * A potential indev allocation can be left alive, it stays | |
816 | * assigned to its device and is destroy with it. | |
817 | */ | |
5c753978 | 818 | goto errout; |
5c753978 | 819 | |
a4e65d36 | 820 | ipv4_devconf_setall(in_dev); |
1d4c8c29 | 821 | neigh_parms_data_state_setall(in_dev->arp_parms); |
5c753978 TG |
822 | in_dev_hold(in_dev); |
823 | ||
51456b29 | 824 | if (!tb[IFA_ADDRESS]) |
5c753978 | 825 | tb[IFA_ADDRESS] = tb[IFA_LOCAL]; |
1da177e4 | 826 | |
fd23c3b3 | 827 | INIT_HLIST_NODE(&ifa->hash); |
1da177e4 LT |
828 | ifa->ifa_prefixlen = ifm->ifa_prefixlen; |
829 | ifa->ifa_mask = inet_make_mask(ifm->ifa_prefixlen); | |
ad6c8135 JP |
830 | ifa->ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : |
831 | ifm->ifa_flags; | |
1da177e4 | 832 | ifa->ifa_scope = ifm->ifa_scope; |
5c753978 TG |
833 | ifa->ifa_dev = in_dev; |
834 | ||
67b61f6c JB |
835 | ifa->ifa_local = nla_get_in_addr(tb[IFA_LOCAL]); |
836 | ifa->ifa_address = nla_get_in_addr(tb[IFA_ADDRESS]); | |
5c753978 TG |
837 | |
838 | if (tb[IFA_BROADCAST]) | |
67b61f6c | 839 | ifa->ifa_broadcast = nla_get_in_addr(tb[IFA_BROADCAST]); |
5c753978 | 840 | |
5c753978 TG |
841 | if (tb[IFA_LABEL]) |
842 | nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ); | |
1da177e4 LT |
843 | else |
844 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
845 | ||
af4d768a DA |
846 | if (tb[IFA_RT_PRIORITY]) |
847 | ifa->ifa_rt_priority = nla_get_u32(tb[IFA_RT_PRIORITY]); | |
848 | ||
5c766d64 JP |
849 | if (tb[IFA_CACHEINFO]) { |
850 | struct ifa_cacheinfo *ci; | |
851 | ||
852 | ci = nla_data(tb[IFA_CACHEINFO]); | |
853 | if (!ci->ifa_valid || ci->ifa_prefered > ci->ifa_valid) { | |
854 | err = -EINVAL; | |
446266b0 | 855 | goto errout_free; |
5c766d64 JP |
856 | } |
857 | *pvalid_lft = ci->ifa_valid; | |
858 | *pprefered_lft = ci->ifa_prefered; | |
859 | } | |
860 | ||
5c753978 TG |
861 | return ifa; |
862 | ||
446266b0 DB |
863 | errout_free: |
864 | inet_free_ifa(ifa); | |
5c753978 TG |
865 | errout: |
866 | return ERR_PTR(err); | |
867 | } | |
868 | ||
5c766d64 JP |
869 | static struct in_ifaddr *find_matching_ifa(struct in_ifaddr *ifa) |
870 | { | |
871 | struct in_device *in_dev = ifa->ifa_dev; | |
872 | struct in_ifaddr *ifa1, **ifap; | |
873 | ||
874 | if (!ifa->ifa_local) | |
875 | return NULL; | |
876 | ||
877 | for (ifap = &in_dev->ifa_list; (ifa1 = *ifap) != NULL; | |
878 | ifap = &ifa1->ifa_next) { | |
879 | if (ifa1->ifa_mask == ifa->ifa_mask && | |
880 | inet_ifa_match(ifa1->ifa_address, ifa) && | |
881 | ifa1->ifa_local == ifa->ifa_local) | |
882 | return ifa1; | |
883 | } | |
884 | return NULL; | |
885 | } | |
886 | ||
c21ef3e3 DA |
887 | static int inet_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, |
888 | struct netlink_ext_ack *extack) | |
5c753978 | 889 | { |
3b1e0a65 | 890 | struct net *net = sock_net(skb->sk); |
5c753978 | 891 | struct in_ifaddr *ifa; |
5c766d64 JP |
892 | struct in_ifaddr *ifa_existing; |
893 | __u32 valid_lft = INFINITY_LIFE_TIME; | |
894 | __u32 prefered_lft = INFINITY_LIFE_TIME; | |
5c753978 TG |
895 | |
896 | ASSERT_RTNL(); | |
897 | ||
dac9c979 | 898 | ifa = rtm_to_ifaddr(net, nlh, &valid_lft, &prefered_lft, extack); |
5c753978 TG |
899 | if (IS_ERR(ifa)) |
900 | return PTR_ERR(ifa); | |
901 | ||
5c766d64 JP |
902 | ifa_existing = find_matching_ifa(ifa); |
903 | if (!ifa_existing) { | |
904 | /* It would be best to check for !NLM_F_CREATE here but | |
614d056c | 905 | * userspace already relies on not having to provide this. |
5c766d64 JP |
906 | */ |
907 | set_ifa_lifetime(ifa, valid_lft, prefered_lft); | |
93a714d6 MC |
908 | if (ifa->ifa_flags & IFA_F_MCAUTOJOIN) { |
909 | int ret = ip_mc_config(net->ipv4.mc_autojoin_sk, | |
910 | true, ifa); | |
911 | ||
912 | if (ret < 0) { | |
913 | inet_free_ifa(ifa); | |
914 | return ret; | |
915 | } | |
916 | } | |
de95e047 DA |
917 | return __inet_insert_ifa(ifa, nlh, NETLINK_CB(skb).portid, |
918 | extack); | |
5c766d64 | 919 | } else { |
af4d768a DA |
920 | u32 new_metric = ifa->ifa_rt_priority; |
921 | ||
5c766d64 JP |
922 | inet_free_ifa(ifa); |
923 | ||
924 | if (nlh->nlmsg_flags & NLM_F_EXCL || | |
925 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
926 | return -EEXIST; | |
34e2ed34 | 927 | ifa = ifa_existing; |
af4d768a DA |
928 | |
929 | if (ifa->ifa_rt_priority != new_metric) { | |
930 | fib_modify_prefix_metric(ifa, new_metric); | |
931 | ifa->ifa_rt_priority = new_metric; | |
932 | } | |
933 | ||
34e2ed34 | 934 | set_ifa_lifetime(ifa, valid_lft, prefered_lft); |
05a324b9 | 935 | cancel_delayed_work(&check_lifetime_work); |
906e073f VK |
936 | queue_delayed_work(system_power_efficient_wq, |
937 | &check_lifetime_work, 0); | |
34e2ed34 | 938 | rtmsg_ifa(RTM_NEWADDR, ifa, nlh, NETLINK_CB(skb).portid); |
5c766d64 JP |
939 | } |
940 | return 0; | |
1da177e4 LT |
941 | } |
942 | ||
943 | /* | |
944 | * Determine a default network mask, based on the IP address. | |
945 | */ | |
946 | ||
40384999 | 947 | static int inet_abc_len(__be32 addr) |
1da177e4 LT |
948 | { |
949 | int rc = -1; /* Something else, probably a multicast. */ | |
950 | ||
65cab850 | 951 | if (ipv4_is_zeronet(addr) || ipv4_is_lbcast(addr)) |
e905a9ed | 952 | rc = 0; |
1da177e4 | 953 | else { |
714e85be | 954 | __u32 haddr = ntohl(addr); |
714e85be | 955 | if (IN_CLASSA(haddr)) |
1da177e4 | 956 | rc = 8; |
714e85be | 957 | else if (IN_CLASSB(haddr)) |
1da177e4 | 958 | rc = 16; |
714e85be | 959 | else if (IN_CLASSC(haddr)) |
1da177e4 | 960 | rc = 24; |
65cab850 DT |
961 | else if (IN_CLASSE(haddr)) |
962 | rc = 32; | |
1da177e4 LT |
963 | } |
964 | ||
e905a9ed | 965 | return rc; |
1da177e4 LT |
966 | } |
967 | ||
968 | ||
03aef17b | 969 | int devinet_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr) |
1da177e4 | 970 | { |
1da177e4 | 971 | struct sockaddr_in sin_orig; |
03aef17b | 972 | struct sockaddr_in *sin = (struct sockaddr_in *)&ifr->ifr_addr; |
1da177e4 LT |
973 | struct in_device *in_dev; |
974 | struct in_ifaddr **ifap = NULL; | |
975 | struct in_ifaddr *ifa = NULL; | |
976 | struct net_device *dev; | |
977 | char *colon; | |
978 | int ret = -EFAULT; | |
979 | int tryaddrmatch = 0; | |
980 | ||
03aef17b | 981 | ifr->ifr_name[IFNAMSIZ - 1] = 0; |
1da177e4 LT |
982 | |
983 | /* save original address for comparison */ | |
984 | memcpy(&sin_orig, sin, sizeof(*sin)); | |
985 | ||
03aef17b | 986 | colon = strchr(ifr->ifr_name, ':'); |
1da177e4 LT |
987 | if (colon) |
988 | *colon = 0; | |
989 | ||
03aef17b | 990 | dev_load(net, ifr->ifr_name); |
1da177e4 | 991 | |
132adf54 | 992 | switch (cmd) { |
1da177e4 LT |
993 | case SIOCGIFADDR: /* Get interface address */ |
994 | case SIOCGIFBRDADDR: /* Get the broadcast address */ | |
995 | case SIOCGIFDSTADDR: /* Get the destination address */ | |
996 | case SIOCGIFNETMASK: /* Get the netmask for the interface */ | |
997 | /* Note that these ioctls will not sleep, | |
998 | so that we do not impose a lock. | |
999 | One day we will be forced to put shlock here (I mean SMP) | |
1000 | */ | |
1001 | tryaddrmatch = (sin_orig.sin_family == AF_INET); | |
1002 | memset(sin, 0, sizeof(*sin)); | |
1003 | sin->sin_family = AF_INET; | |
1004 | break; | |
1005 | ||
1006 | case SIOCSIFFLAGS: | |
bf5b30b8 | 1007 | ret = -EPERM; |
52e804c6 | 1008 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
1009 | goto out; |
1010 | break; | |
1011 | case SIOCSIFADDR: /* Set interface address (and family) */ | |
1012 | case SIOCSIFBRDADDR: /* Set the broadcast address */ | |
1013 | case SIOCSIFDSTADDR: /* Set the destination address */ | |
1014 | case SIOCSIFNETMASK: /* Set the netmask for the interface */ | |
bf5b30b8 | 1015 | ret = -EPERM; |
52e804c6 | 1016 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
1017 | goto out; |
1018 | ret = -EINVAL; | |
1019 | if (sin->sin_family != AF_INET) | |
1020 | goto out; | |
1021 | break; | |
1022 | default: | |
1023 | ret = -EINVAL; | |
1024 | goto out; | |
1025 | } | |
1026 | ||
1027 | rtnl_lock(); | |
1028 | ||
1029 | ret = -ENODEV; | |
03aef17b | 1030 | dev = __dev_get_by_name(net, ifr->ifr_name); |
9f9354b9 | 1031 | if (!dev) |
1da177e4 LT |
1032 | goto done; |
1033 | ||
1034 | if (colon) | |
1035 | *colon = ':'; | |
1036 | ||
9f9354b9 ED |
1037 | in_dev = __in_dev_get_rtnl(dev); |
1038 | if (in_dev) { | |
1da177e4 LT |
1039 | if (tryaddrmatch) { |
1040 | /* Matthias Andree */ | |
1041 | /* compare label and address (4.4BSD style) */ | |
1042 | /* note: we only do this for a limited set of ioctls | |
1043 | and only if the original address family was AF_INET. | |
1044 | This is checked above. */ | |
1045 | for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL; | |
1046 | ifap = &ifa->ifa_next) { | |
03aef17b | 1047 | if (!strcmp(ifr->ifr_name, ifa->ifa_label) && |
1da177e4 | 1048 | sin_orig.sin_addr.s_addr == |
6c91afe1 | 1049 | ifa->ifa_local) { |
1da177e4 LT |
1050 | break; /* found */ |
1051 | } | |
1052 | } | |
1053 | } | |
1054 | /* we didn't get a match, maybe the application is | |
1055 | 4.3BSD-style and passed in junk so we fall back to | |
1056 | comparing just the label */ | |
1057 | if (!ifa) { | |
1058 | for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL; | |
1059 | ifap = &ifa->ifa_next) | |
03aef17b | 1060 | if (!strcmp(ifr->ifr_name, ifa->ifa_label)) |
1da177e4 LT |
1061 | break; |
1062 | } | |
1063 | } | |
1064 | ||
1065 | ret = -EADDRNOTAVAIL; | |
1066 | if (!ifa && cmd != SIOCSIFADDR && cmd != SIOCSIFFLAGS) | |
1067 | goto done; | |
1068 | ||
132adf54 | 1069 | switch (cmd) { |
1da177e4 | 1070 | case SIOCGIFADDR: /* Get interface address */ |
30e948a3 | 1071 | ret = 0; |
1da177e4 | 1072 | sin->sin_addr.s_addr = ifa->ifa_local; |
03aef17b | 1073 | break; |
1da177e4 LT |
1074 | |
1075 | case SIOCGIFBRDADDR: /* Get the broadcast address */ | |
30e948a3 | 1076 | ret = 0; |
1da177e4 | 1077 | sin->sin_addr.s_addr = ifa->ifa_broadcast; |
03aef17b | 1078 | break; |
1da177e4 LT |
1079 | |
1080 | case SIOCGIFDSTADDR: /* Get the destination address */ | |
30e948a3 | 1081 | ret = 0; |
1da177e4 | 1082 | sin->sin_addr.s_addr = ifa->ifa_address; |
03aef17b | 1083 | break; |
1da177e4 LT |
1084 | |
1085 | case SIOCGIFNETMASK: /* Get the netmask for the interface */ | |
30e948a3 | 1086 | ret = 0; |
1da177e4 | 1087 | sin->sin_addr.s_addr = ifa->ifa_mask; |
03aef17b | 1088 | break; |
1da177e4 LT |
1089 | |
1090 | case SIOCSIFFLAGS: | |
1091 | if (colon) { | |
1092 | ret = -EADDRNOTAVAIL; | |
1093 | if (!ifa) | |
1094 | break; | |
1095 | ret = 0; | |
03aef17b | 1096 | if (!(ifr->ifr_flags & IFF_UP)) |
1da177e4 LT |
1097 | inet_del_ifa(in_dev, ifap, 1); |
1098 | break; | |
1099 | } | |
567c5e13 | 1100 | ret = dev_change_flags(dev, ifr->ifr_flags, NULL); |
1da177e4 LT |
1101 | break; |
1102 | ||
1103 | case SIOCSIFADDR: /* Set interface address (and family) */ | |
1104 | ret = -EINVAL; | |
1105 | if (inet_abc_len(sin->sin_addr.s_addr) < 0) | |
1106 | break; | |
1107 | ||
1108 | if (!ifa) { | |
1109 | ret = -ENOBUFS; | |
9f9354b9 ED |
1110 | ifa = inet_alloc_ifa(); |
1111 | if (!ifa) | |
1da177e4 | 1112 | break; |
c7e2e1d7 | 1113 | INIT_HLIST_NODE(&ifa->hash); |
1da177e4 | 1114 | if (colon) |
03aef17b | 1115 | memcpy(ifa->ifa_label, ifr->ifr_name, IFNAMSIZ); |
1da177e4 LT |
1116 | else |
1117 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
1118 | } else { | |
1119 | ret = 0; | |
1120 | if (ifa->ifa_local == sin->sin_addr.s_addr) | |
1121 | break; | |
1122 | inet_del_ifa(in_dev, ifap, 0); | |
1123 | ifa->ifa_broadcast = 0; | |
148f9729 | 1124 | ifa->ifa_scope = 0; |
1da177e4 LT |
1125 | } |
1126 | ||
1127 | ifa->ifa_address = ifa->ifa_local = sin->sin_addr.s_addr; | |
1128 | ||
1129 | if (!(dev->flags & IFF_POINTOPOINT)) { | |
1130 | ifa->ifa_prefixlen = inet_abc_len(ifa->ifa_address); | |
1131 | ifa->ifa_mask = inet_make_mask(ifa->ifa_prefixlen); | |
1132 | if ((dev->flags & IFF_BROADCAST) && | |
1133 | ifa->ifa_prefixlen < 31) | |
1134 | ifa->ifa_broadcast = ifa->ifa_address | | |
1135 | ~ifa->ifa_mask; | |
1136 | } else { | |
1137 | ifa->ifa_prefixlen = 32; | |
1138 | ifa->ifa_mask = inet_make_mask(32); | |
1139 | } | |
5c766d64 | 1140 | set_ifa_lifetime(ifa, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); |
1da177e4 LT |
1141 | ret = inet_set_ifa(dev, ifa); |
1142 | break; | |
1143 | ||
1144 | case SIOCSIFBRDADDR: /* Set the broadcast address */ | |
1145 | ret = 0; | |
1146 | if (ifa->ifa_broadcast != sin->sin_addr.s_addr) { | |
1147 | inet_del_ifa(in_dev, ifap, 0); | |
1148 | ifa->ifa_broadcast = sin->sin_addr.s_addr; | |
1149 | inet_insert_ifa(ifa); | |
1150 | } | |
1151 | break; | |
1152 | ||
1153 | case SIOCSIFDSTADDR: /* Set the destination address */ | |
1154 | ret = 0; | |
1155 | if (ifa->ifa_address == sin->sin_addr.s_addr) | |
1156 | break; | |
1157 | ret = -EINVAL; | |
1158 | if (inet_abc_len(sin->sin_addr.s_addr) < 0) | |
1159 | break; | |
1160 | ret = 0; | |
1161 | inet_del_ifa(in_dev, ifap, 0); | |
1162 | ifa->ifa_address = sin->sin_addr.s_addr; | |
1163 | inet_insert_ifa(ifa); | |
1164 | break; | |
1165 | ||
1166 | case SIOCSIFNETMASK: /* Set the netmask for the interface */ | |
1167 | ||
1168 | /* | |
1169 | * The mask we set must be legal. | |
1170 | */ | |
1171 | ret = -EINVAL; | |
1172 | if (bad_mask(sin->sin_addr.s_addr, 0)) | |
1173 | break; | |
1174 | ret = 0; | |
1175 | if (ifa->ifa_mask != sin->sin_addr.s_addr) { | |
a144ea4b | 1176 | __be32 old_mask = ifa->ifa_mask; |
1da177e4 LT |
1177 | inet_del_ifa(in_dev, ifap, 0); |
1178 | ifa->ifa_mask = sin->sin_addr.s_addr; | |
1179 | ifa->ifa_prefixlen = inet_mask_len(ifa->ifa_mask); | |
1180 | ||
1181 | /* See if current broadcast address matches | |
1182 | * with current netmask, then recalculate | |
1183 | * the broadcast address. Otherwise it's a | |
1184 | * funny address, so don't touch it since | |
1185 | * the user seems to know what (s)he's doing... | |
1186 | */ | |
1187 | if ((dev->flags & IFF_BROADCAST) && | |
1188 | (ifa->ifa_prefixlen < 31) && | |
1189 | (ifa->ifa_broadcast == | |
dcab5e1e | 1190 | (ifa->ifa_local|~old_mask))) { |
1da177e4 LT |
1191 | ifa->ifa_broadcast = (ifa->ifa_local | |
1192 | ~sin->sin_addr.s_addr); | |
1193 | } | |
1194 | inet_insert_ifa(ifa); | |
1195 | } | |
1196 | break; | |
1197 | } | |
1198 | done: | |
1199 | rtnl_unlock(); | |
1200 | out: | |
1201 | return ret; | |
1da177e4 LT |
1202 | } |
1203 | ||
36fd633e | 1204 | static int inet_gifconf(struct net_device *dev, char __user *buf, int len, int size) |
1da177e4 | 1205 | { |
e5ed6399 | 1206 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
1207 | struct in_ifaddr *ifa; |
1208 | struct ifreq ifr; | |
1209 | int done = 0; | |
1210 | ||
36fd633e AV |
1211 | if (WARN_ON(size > sizeof(struct ifreq))) |
1212 | goto out; | |
1213 | ||
9f9354b9 | 1214 | if (!in_dev) |
1da177e4 LT |
1215 | goto out; |
1216 | ||
9f9354b9 | 1217 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { |
1da177e4 | 1218 | if (!buf) { |
36fd633e | 1219 | done += size; |
1da177e4 LT |
1220 | continue; |
1221 | } | |
36fd633e | 1222 | if (len < size) |
1da177e4 LT |
1223 | break; |
1224 | memset(&ifr, 0, sizeof(struct ifreq)); | |
4299c8a9 | 1225 | strcpy(ifr.ifr_name, ifa->ifa_label); |
1da177e4 LT |
1226 | |
1227 | (*(struct sockaddr_in *)&ifr.ifr_addr).sin_family = AF_INET; | |
1228 | (*(struct sockaddr_in *)&ifr.ifr_addr).sin_addr.s_addr = | |
1229 | ifa->ifa_local; | |
1230 | ||
36fd633e | 1231 | if (copy_to_user(buf + done, &ifr, size)) { |
1da177e4 LT |
1232 | done = -EFAULT; |
1233 | break; | |
1234 | } | |
36fd633e AV |
1235 | len -= size; |
1236 | done += size; | |
1da177e4 LT |
1237 | } |
1238 | out: | |
1239 | return done; | |
1240 | } | |
1241 | ||
8b57fd1e GF |
1242 | static __be32 in_dev_select_addr(const struct in_device *in_dev, |
1243 | int scope) | |
1244 | { | |
1245 | for_primary_ifa(in_dev) { | |
1246 | if (ifa->ifa_scope != RT_SCOPE_LINK && | |
1247 | ifa->ifa_scope <= scope) | |
1248 | return ifa->ifa_local; | |
1249 | } endfor_ifa(in_dev); | |
1250 | ||
1251 | return 0; | |
1252 | } | |
1253 | ||
a61ced5d | 1254 | __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope) |
1da177e4 | 1255 | { |
a61ced5d | 1256 | __be32 addr = 0; |
1da177e4 | 1257 | struct in_device *in_dev; |
c346dca1 | 1258 | struct net *net = dev_net(dev); |
3f2fb9a8 | 1259 | int master_idx; |
1da177e4 LT |
1260 | |
1261 | rcu_read_lock(); | |
e5ed6399 | 1262 | in_dev = __in_dev_get_rcu(dev); |
1da177e4 LT |
1263 | if (!in_dev) |
1264 | goto no_in_dev; | |
1265 | ||
1266 | for_primary_ifa(in_dev) { | |
1267 | if (ifa->ifa_scope > scope) | |
1268 | continue; | |
1269 | if (!dst || inet_ifa_match(dst, ifa)) { | |
1270 | addr = ifa->ifa_local; | |
1271 | break; | |
1272 | } | |
1273 | if (!addr) | |
1274 | addr = ifa->ifa_local; | |
1275 | } endfor_ifa(in_dev); | |
1da177e4 LT |
1276 | |
1277 | if (addr) | |
c6d14c84 | 1278 | goto out_unlock; |
9f9354b9 | 1279 | no_in_dev: |
3f2fb9a8 | 1280 | master_idx = l3mdev_master_ifindex_rcu(dev); |
1da177e4 | 1281 | |
17b693cd DL |
1282 | /* For VRFs, the VRF device takes the place of the loopback device, |
1283 | * with addresses on it being preferred. Note in such cases the | |
1284 | * loopback device will be among the devices that fail the master_idx | |
1285 | * equality check in the loop below. | |
1286 | */ | |
1287 | if (master_idx && | |
1288 | (dev = dev_get_by_index_rcu(net, master_idx)) && | |
1289 | (in_dev = __in_dev_get_rcu(dev))) { | |
8b57fd1e GF |
1290 | addr = in_dev_select_addr(in_dev, scope); |
1291 | if (addr) | |
1292 | goto out_unlock; | |
17b693cd DL |
1293 | } |
1294 | ||
1da177e4 | 1295 | /* Not loopback addresses on loopback should be preferred |
ca9f1fd2 | 1296 | in this case. It is important that lo is the first interface |
1da177e4 LT |
1297 | in dev_base list. |
1298 | */ | |
c6d14c84 | 1299 | for_each_netdev_rcu(net, dev) { |
3f2fb9a8 DA |
1300 | if (l3mdev_master_ifindex_rcu(dev) != master_idx) |
1301 | continue; | |
1302 | ||
9f9354b9 ED |
1303 | in_dev = __in_dev_get_rcu(dev); |
1304 | if (!in_dev) | |
1da177e4 LT |
1305 | continue; |
1306 | ||
8b57fd1e GF |
1307 | addr = in_dev_select_addr(in_dev, scope); |
1308 | if (addr) | |
1309 | goto out_unlock; | |
1da177e4 | 1310 | } |
c6d14c84 | 1311 | out_unlock: |
1da177e4 | 1312 | rcu_read_unlock(); |
1da177e4 LT |
1313 | return addr; |
1314 | } | |
9f9354b9 | 1315 | EXPORT_SYMBOL(inet_select_addr); |
1da177e4 | 1316 | |
60cad5da AV |
1317 | static __be32 confirm_addr_indev(struct in_device *in_dev, __be32 dst, |
1318 | __be32 local, int scope) | |
1da177e4 LT |
1319 | { |
1320 | int same = 0; | |
a144ea4b | 1321 | __be32 addr = 0; |
1da177e4 LT |
1322 | |
1323 | for_ifa(in_dev) { | |
1324 | if (!addr && | |
1325 | (local == ifa->ifa_local || !local) && | |
1326 | ifa->ifa_scope <= scope) { | |
1327 | addr = ifa->ifa_local; | |
1328 | if (same) | |
1329 | break; | |
1330 | } | |
1331 | if (!same) { | |
1332 | same = (!local || inet_ifa_match(local, ifa)) && | |
1333 | (!dst || inet_ifa_match(dst, ifa)); | |
1334 | if (same && addr) { | |
1335 | if (local || !dst) | |
1336 | break; | |
1337 | /* Is the selected addr into dst subnet? */ | |
1338 | if (inet_ifa_match(addr, ifa)) | |
1339 | break; | |
1340 | /* No, then can we use new local src? */ | |
1341 | if (ifa->ifa_scope <= scope) { | |
1342 | addr = ifa->ifa_local; | |
1343 | break; | |
1344 | } | |
1345 | /* search for large dst subnet for addr */ | |
1346 | same = 0; | |
1347 | } | |
1348 | } | |
1349 | } endfor_ifa(in_dev); | |
1350 | ||
9f9354b9 | 1351 | return same ? addr : 0; |
1da177e4 LT |
1352 | } |
1353 | ||
1354 | /* | |
1355 | * Confirm that local IP address exists using wildcards: | |
b601fa19 ND |
1356 | * - net: netns to check, cannot be NULL |
1357 | * - in_dev: only on this interface, NULL=any interface | |
1da177e4 LT |
1358 | * - dst: only in the same subnet as dst, 0=any dst |
1359 | * - local: address, 0=autoselect the local address | |
1360 | * - scope: maximum allowed scope value for the local address | |
1361 | */ | |
b601fa19 | 1362 | __be32 inet_confirm_addr(struct net *net, struct in_device *in_dev, |
9bd85e32 | 1363 | __be32 dst, __be32 local, int scope) |
1da177e4 | 1364 | { |
60cad5da | 1365 | __be32 addr = 0; |
9bd85e32 | 1366 | struct net_device *dev; |
1da177e4 | 1367 | |
00db4124 | 1368 | if (in_dev) |
9bd85e32 | 1369 | return confirm_addr_indev(in_dev, dst, local, scope); |
1da177e4 | 1370 | |
1da177e4 | 1371 | rcu_read_lock(); |
c6d14c84 | 1372 | for_each_netdev_rcu(net, dev) { |
9f9354b9 ED |
1373 | in_dev = __in_dev_get_rcu(dev); |
1374 | if (in_dev) { | |
1da177e4 LT |
1375 | addr = confirm_addr_indev(in_dev, dst, local, scope); |
1376 | if (addr) | |
1377 | break; | |
1378 | } | |
1379 | } | |
1380 | rcu_read_unlock(); | |
1da177e4 LT |
1381 | |
1382 | return addr; | |
1383 | } | |
eaddcd76 | 1384 | EXPORT_SYMBOL(inet_confirm_addr); |
1da177e4 LT |
1385 | |
1386 | /* | |
1387 | * Device notifier | |
1388 | */ | |
1389 | ||
1390 | int register_inetaddr_notifier(struct notifier_block *nb) | |
1391 | { | |
e041c683 | 1392 | return blocking_notifier_chain_register(&inetaddr_chain, nb); |
1da177e4 | 1393 | } |
9f9354b9 | 1394 | EXPORT_SYMBOL(register_inetaddr_notifier); |
1da177e4 LT |
1395 | |
1396 | int unregister_inetaddr_notifier(struct notifier_block *nb) | |
1397 | { | |
e041c683 | 1398 | return blocking_notifier_chain_unregister(&inetaddr_chain, nb); |
1da177e4 | 1399 | } |
9f9354b9 | 1400 | EXPORT_SYMBOL(unregister_inetaddr_notifier); |
1da177e4 | 1401 | |
3ad7d246 KJ |
1402 | int register_inetaddr_validator_notifier(struct notifier_block *nb) |
1403 | { | |
1404 | return blocking_notifier_chain_register(&inetaddr_validator_chain, nb); | |
1405 | } | |
1406 | EXPORT_SYMBOL(register_inetaddr_validator_notifier); | |
1407 | ||
1408 | int unregister_inetaddr_validator_notifier(struct notifier_block *nb) | |
1409 | { | |
1410 | return blocking_notifier_chain_unregister(&inetaddr_validator_chain, | |
1411 | nb); | |
1412 | } | |
1413 | EXPORT_SYMBOL(unregister_inetaddr_validator_notifier); | |
1414 | ||
9f9354b9 ED |
1415 | /* Rename ifa_labels for a device name change. Make some effort to preserve |
1416 | * existing alias numbering and to create unique labels if possible. | |
1da177e4 LT |
1417 | */ |
1418 | static void inetdev_changename(struct net_device *dev, struct in_device *in_dev) | |
e905a9ed | 1419 | { |
1da177e4 LT |
1420 | struct in_ifaddr *ifa; |
1421 | int named = 0; | |
1422 | ||
e905a9ed YH |
1423 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { |
1424 | char old[IFNAMSIZ], *dot; | |
1da177e4 LT |
1425 | |
1426 | memcpy(old, ifa->ifa_label, IFNAMSIZ); | |
e905a9ed | 1427 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
1da177e4 | 1428 | if (named++ == 0) |
573bf470 | 1429 | goto skip; |
44344b2a | 1430 | dot = strchr(old, ':'); |
51456b29 | 1431 | if (!dot) { |
e905a9ed | 1432 | sprintf(old, ":%d", named); |
1da177e4 LT |
1433 | dot = old; |
1434 | } | |
9f9354b9 | 1435 | if (strlen(dot) + strlen(dev->name) < IFNAMSIZ) |
e905a9ed | 1436 | strcat(ifa->ifa_label, dot); |
9f9354b9 | 1437 | else |
e905a9ed | 1438 | strcpy(ifa->ifa_label + (IFNAMSIZ - strlen(dot) - 1), dot); |
573bf470 TG |
1439 | skip: |
1440 | rtmsg_ifa(RTM_NEWADDR, ifa, NULL, 0); | |
e905a9ed YH |
1441 | } |
1442 | } | |
1da177e4 | 1443 | |
40384999 | 1444 | static bool inetdev_valid_mtu(unsigned int mtu) |
06770843 | 1445 | { |
b5476022 | 1446 | return mtu >= IPV4_MIN_MTU; |
06770843 BL |
1447 | } |
1448 | ||
d11327ad IC |
1449 | static void inetdev_send_gratuitous_arp(struct net_device *dev, |
1450 | struct in_device *in_dev) | |
1451 | ||
1452 | { | |
b76d0789 | 1453 | struct in_ifaddr *ifa; |
d11327ad | 1454 | |
b76d0789 ZK |
1455 | for (ifa = in_dev->ifa_list; ifa; |
1456 | ifa = ifa->ifa_next) { | |
1457 | arp_send(ARPOP_REQUEST, ETH_P_ARP, | |
1458 | ifa->ifa_local, dev, | |
1459 | ifa->ifa_local, NULL, | |
1460 | dev->dev_addr, NULL); | |
1461 | } | |
d11327ad IC |
1462 | } |
1463 | ||
1da177e4 LT |
1464 | /* Called only under RTNL semaphore */ |
1465 | ||
1466 | static int inetdev_event(struct notifier_block *this, unsigned long event, | |
1467 | void *ptr) | |
1468 | { | |
351638e7 | 1469 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
748e2d93 | 1470 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
0115e8e3 | 1471 | |
1da177e4 LT |
1472 | ASSERT_RTNL(); |
1473 | ||
1474 | if (!in_dev) { | |
8030f544 | 1475 | if (event == NETDEV_REGISTER) { |
1da177e4 | 1476 | in_dev = inetdev_init(dev); |
20e61da7 WC |
1477 | if (IS_ERR(in_dev)) |
1478 | return notifier_from_errno(PTR_ERR(in_dev)); | |
0cc217e1 | 1479 | if (dev->flags & IFF_LOOPBACK) { |
42f811b8 HX |
1480 | IN_DEV_CONF_SET(in_dev, NOXFRM, 1); |
1481 | IN_DEV_CONF_SET(in_dev, NOPOLICY, 1); | |
8030f544 | 1482 | } |
06770843 BL |
1483 | } else if (event == NETDEV_CHANGEMTU) { |
1484 | /* Re-enabling IP */ | |
1485 | if (inetdev_valid_mtu(dev->mtu)) | |
1486 | in_dev = inetdev_init(dev); | |
1da177e4 LT |
1487 | } |
1488 | goto out; | |
1489 | } | |
1490 | ||
1491 | switch (event) { | |
1492 | case NETDEV_REGISTER: | |
91df42be | 1493 | pr_debug("%s: bug\n", __func__); |
a9b3cd7f | 1494 | RCU_INIT_POINTER(dev->ip_ptr, NULL); |
1da177e4 LT |
1495 | break; |
1496 | case NETDEV_UP: | |
06770843 | 1497 | if (!inetdev_valid_mtu(dev->mtu)) |
1da177e4 | 1498 | break; |
0cc217e1 | 1499 | if (dev->flags & IFF_LOOPBACK) { |
9f9354b9 ED |
1500 | struct in_ifaddr *ifa = inet_alloc_ifa(); |
1501 | ||
1502 | if (ifa) { | |
fd23c3b3 | 1503 | INIT_HLIST_NODE(&ifa->hash); |
1da177e4 LT |
1504 | ifa->ifa_local = |
1505 | ifa->ifa_address = htonl(INADDR_LOOPBACK); | |
1506 | ifa->ifa_prefixlen = 8; | |
1507 | ifa->ifa_mask = inet_make_mask(8); | |
1508 | in_dev_hold(in_dev); | |
1509 | ifa->ifa_dev = in_dev; | |
1510 | ifa->ifa_scope = RT_SCOPE_HOST; | |
1511 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
5c766d64 JP |
1512 | set_ifa_lifetime(ifa, INFINITY_LIFE_TIME, |
1513 | INFINITY_LIFE_TIME); | |
dfd1582d JP |
1514 | ipv4_devconf_setall(in_dev); |
1515 | neigh_parms_data_state_setall(in_dev->arp_parms); | |
1da177e4 LT |
1516 | inet_insert_ifa(ifa); |
1517 | } | |
1518 | } | |
1519 | ip_mc_up(in_dev); | |
eefef1cf SH |
1520 | /* fall through */ |
1521 | case NETDEV_CHANGEADDR: | |
d11327ad IC |
1522 | if (!IN_DEV_ARP_NOTIFY(in_dev)) |
1523 | break; | |
1524 | /* fall through */ | |
1525 | case NETDEV_NOTIFY_PEERS: | |
a21090cf | 1526 | /* Send gratuitous ARP to notify of link change */ |
d11327ad | 1527 | inetdev_send_gratuitous_arp(dev, in_dev); |
1da177e4 LT |
1528 | break; |
1529 | case NETDEV_DOWN: | |
1530 | ip_mc_down(in_dev); | |
1531 | break; | |
93d9b7d7 | 1532 | case NETDEV_PRE_TYPE_CHANGE: |
75c78500 MS |
1533 | ip_mc_unmap(in_dev); |
1534 | break; | |
93d9b7d7 | 1535 | case NETDEV_POST_TYPE_CHANGE: |
75c78500 MS |
1536 | ip_mc_remap(in_dev); |
1537 | break; | |
1da177e4 | 1538 | case NETDEV_CHANGEMTU: |
06770843 | 1539 | if (inetdev_valid_mtu(dev->mtu)) |
1da177e4 | 1540 | break; |
06770843 | 1541 | /* disable IP when MTU is not enough */ |
fcfd6dfa | 1542 | /* fall through */ |
1da177e4 LT |
1543 | case NETDEV_UNREGISTER: |
1544 | inetdev_destroy(in_dev); | |
1545 | break; | |
1546 | case NETDEV_CHANGENAME: | |
1547 | /* Do not notify about label change, this event is | |
1548 | * not interesting to applications using netlink. | |
1549 | */ | |
1550 | inetdev_changename(dev, in_dev); | |
1551 | ||
51602b2a | 1552 | devinet_sysctl_unregister(in_dev); |
66f27a52 | 1553 | devinet_sysctl_register(in_dev); |
1da177e4 LT |
1554 | break; |
1555 | } | |
1556 | out: | |
1557 | return NOTIFY_DONE; | |
1558 | } | |
1559 | ||
1560 | static struct notifier_block ip_netdev_notifier = { | |
539afedf | 1561 | .notifier_call = inetdev_event, |
1da177e4 LT |
1562 | }; |
1563 | ||
40384999 | 1564 | static size_t inet_nlmsg_size(void) |
339bf98f TG |
1565 | { |
1566 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) | |
1567 | + nla_total_size(4) /* IFA_ADDRESS */ | |
1568 | + nla_total_size(4) /* IFA_LOCAL */ | |
1569 | + nla_total_size(4) /* IFA_BROADCAST */ | |
ad6c8135 | 1570 | + nla_total_size(IFNAMSIZ) /* IFA_LABEL */ |
63b5f152 | 1571 | + nla_total_size(4) /* IFA_FLAGS */ |
af4d768a | 1572 | + nla_total_size(4) /* IFA_RT_PRIORITY */ |
63b5f152 | 1573 | + nla_total_size(sizeof(struct ifa_cacheinfo)); /* IFA_CACHEINFO */ |
339bf98f TG |
1574 | } |
1575 | ||
5c766d64 JP |
1576 | static inline u32 cstamp_delta(unsigned long cstamp) |
1577 | { | |
1578 | return (cstamp - INITIAL_JIFFIES) * 100UL / HZ; | |
1579 | } | |
1580 | ||
1581 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, | |
1582 | unsigned long tstamp, u32 preferred, u32 valid) | |
1583 | { | |
1584 | struct ifa_cacheinfo ci; | |
1585 | ||
1586 | ci.cstamp = cstamp_delta(cstamp); | |
1587 | ci.tstamp = cstamp_delta(tstamp); | |
1588 | ci.ifa_prefered = preferred; | |
1589 | ci.ifa_valid = valid; | |
1590 | ||
1591 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
1592 | } | |
1593 | ||
1da177e4 | 1594 | static int inet_fill_ifaddr(struct sk_buff *skb, struct in_ifaddr *ifa, |
978a46fa | 1595 | struct inet_fill_args *args) |
1da177e4 LT |
1596 | { |
1597 | struct ifaddrmsg *ifm; | |
1598 | struct nlmsghdr *nlh; | |
5c766d64 | 1599 | u32 preferred, valid; |
1da177e4 | 1600 | |
978a46fa CB |
1601 | nlh = nlmsg_put(skb, args->portid, args->seq, args->event, sizeof(*ifm), |
1602 | args->flags); | |
51456b29 | 1603 | if (!nlh) |
26932566 | 1604 | return -EMSGSIZE; |
47f68512 TG |
1605 | |
1606 | ifm = nlmsg_data(nlh); | |
1da177e4 LT |
1607 | ifm->ifa_family = AF_INET; |
1608 | ifm->ifa_prefixlen = ifa->ifa_prefixlen; | |
5c766d64 | 1609 | ifm->ifa_flags = ifa->ifa_flags; |
1da177e4 LT |
1610 | ifm->ifa_scope = ifa->ifa_scope; |
1611 | ifm->ifa_index = ifa->ifa_dev->dev->ifindex; | |
47f68512 | 1612 | |
978a46fa CB |
1613 | if (args->netnsid >= 0 && |
1614 | nla_put_s32(skb, IFA_TARGET_NETNSID, args->netnsid)) | |
d3807145 CB |
1615 | goto nla_put_failure; |
1616 | ||
5c766d64 JP |
1617 | if (!(ifm->ifa_flags & IFA_F_PERMANENT)) { |
1618 | preferred = ifa->ifa_preferred_lft; | |
1619 | valid = ifa->ifa_valid_lft; | |
1620 | if (preferred != INFINITY_LIFE_TIME) { | |
1621 | long tval = (jiffies - ifa->ifa_tstamp) / HZ; | |
1622 | ||
1623 | if (preferred > tval) | |
1624 | preferred -= tval; | |
1625 | else | |
1626 | preferred = 0; | |
1627 | if (valid != INFINITY_LIFE_TIME) { | |
1628 | if (valid > tval) | |
1629 | valid -= tval; | |
1630 | else | |
1631 | valid = 0; | |
1632 | } | |
1633 | } | |
1634 | } else { | |
1635 | preferred = INFINITY_LIFE_TIME; | |
1636 | valid = INFINITY_LIFE_TIME; | |
1637 | } | |
f3756b79 | 1638 | if ((ifa->ifa_address && |
930345ea | 1639 | nla_put_in_addr(skb, IFA_ADDRESS, ifa->ifa_address)) || |
f3756b79 | 1640 | (ifa->ifa_local && |
930345ea | 1641 | nla_put_in_addr(skb, IFA_LOCAL, ifa->ifa_local)) || |
f3756b79 | 1642 | (ifa->ifa_broadcast && |
930345ea | 1643 | nla_put_in_addr(skb, IFA_BROADCAST, ifa->ifa_broadcast)) || |
f3756b79 | 1644 | (ifa->ifa_label[0] && |
5c766d64 | 1645 | nla_put_string(skb, IFA_LABEL, ifa->ifa_label)) || |
ad6c8135 | 1646 | nla_put_u32(skb, IFA_FLAGS, ifa->ifa_flags) || |
af4d768a DA |
1647 | (ifa->ifa_rt_priority && |
1648 | nla_put_u32(skb, IFA_RT_PRIORITY, ifa->ifa_rt_priority)) || | |
5c766d64 JP |
1649 | put_cacheinfo(skb, ifa->ifa_cstamp, ifa->ifa_tstamp, |
1650 | preferred, valid)) | |
f3756b79 | 1651 | goto nla_put_failure; |
1da177e4 | 1652 | |
053c095a JB |
1653 | nlmsg_end(skb, nlh); |
1654 | return 0; | |
47f68512 TG |
1655 | |
1656 | nla_put_failure: | |
26932566 PM |
1657 | nlmsg_cancel(skb, nlh); |
1658 | return -EMSGSIZE; | |
1da177e4 LT |
1659 | } |
1660 | ||
c33078e3 DA |
1661 | static int inet_valid_dump_ifaddr_req(const struct nlmsghdr *nlh, |
1662 | struct inet_fill_args *fillargs, | |
1663 | struct net **tgt_net, struct sock *sk, | |
5fcd266a | 1664 | struct netlink_callback *cb) |
c33078e3 | 1665 | { |
5fcd266a | 1666 | struct netlink_ext_ack *extack = cb->extack; |
c33078e3 DA |
1667 | struct nlattr *tb[IFA_MAX+1]; |
1668 | struct ifaddrmsg *ifm; | |
1669 | int err, i; | |
1670 | ||
1671 | if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) { | |
1672 | NL_SET_ERR_MSG(extack, "ipv4: Invalid header for address dump request"); | |
1673 | return -EINVAL; | |
1674 | } | |
1675 | ||
1676 | ifm = nlmsg_data(nlh); | |
1677 | if (ifm->ifa_prefixlen || ifm->ifa_flags || ifm->ifa_scope) { | |
1678 | NL_SET_ERR_MSG(extack, "ipv4: Invalid values in header for address dump request"); | |
1679 | return -EINVAL; | |
1680 | } | |
5fcd266a DA |
1681 | |
1682 | fillargs->ifindex = ifm->ifa_index; | |
1683 | if (fillargs->ifindex) { | |
1684 | cb->answer_flags |= NLM_F_DUMP_FILTERED; | |
1685 | fillargs->flags |= NLM_F_DUMP_FILTERED; | |
c33078e3 DA |
1686 | } |
1687 | ||
8cb08174 JB |
1688 | err = nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, IFA_MAX, |
1689 | ifa_ipv4_policy, extack); | |
c33078e3 DA |
1690 | if (err < 0) |
1691 | return err; | |
1692 | ||
1693 | for (i = 0; i <= IFA_MAX; ++i) { | |
1694 | if (!tb[i]) | |
1695 | continue; | |
1696 | ||
1697 | if (i == IFA_TARGET_NETNSID) { | |
1698 | struct net *net; | |
1699 | ||
1700 | fillargs->netnsid = nla_get_s32(tb[i]); | |
1701 | ||
1702 | net = rtnl_get_net_ns_capable(sk, fillargs->netnsid); | |
1703 | if (IS_ERR(net)) { | |
bf4cc40e | 1704 | fillargs->netnsid = -1; |
c33078e3 DA |
1705 | NL_SET_ERR_MSG(extack, "ipv4: Invalid target network namespace id"); |
1706 | return PTR_ERR(net); | |
1707 | } | |
1708 | *tgt_net = net; | |
1709 | } else { | |
1710 | NL_SET_ERR_MSG(extack, "ipv4: Unsupported attribute in dump request"); | |
1711 | return -EINVAL; | |
1712 | } | |
1713 | } | |
1714 | ||
1715 | return 0; | |
1716 | } | |
1717 | ||
1c98eca4 DA |
1718 | static int in_dev_dump_addr(struct in_device *in_dev, struct sk_buff *skb, |
1719 | struct netlink_callback *cb, int s_ip_idx, | |
1720 | struct inet_fill_args *fillargs) | |
1721 | { | |
1722 | struct in_ifaddr *ifa; | |
1723 | int ip_idx = 0; | |
1724 | int err; | |
1725 | ||
1726 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next, ip_idx++) { | |
1727 | if (ip_idx < s_ip_idx) | |
1728 | continue; | |
1729 | ||
1730 | err = inet_fill_ifaddr(skb, ifa, fillargs); | |
1731 | if (err < 0) | |
1732 | goto done; | |
1733 | ||
1734 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); | |
1735 | } | |
1736 | err = 0; | |
1737 | ||
1738 | done: | |
1739 | cb->args[2] = ip_idx; | |
1740 | ||
1741 | return err; | |
1742 | } | |
1743 | ||
1da177e4 LT |
1744 | static int inet_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) |
1745 | { | |
c33078e3 | 1746 | const struct nlmsghdr *nlh = cb->nlh; |
978a46fa CB |
1747 | struct inet_fill_args fillargs = { |
1748 | .portid = NETLINK_CB(cb->skb).portid, | |
c33078e3 | 1749 | .seq = nlh->nlmsg_seq, |
978a46fa CB |
1750 | .event = RTM_NEWADDR, |
1751 | .flags = NLM_F_MULTI, | |
1752 | .netnsid = -1, | |
1753 | }; | |
3b1e0a65 | 1754 | struct net *net = sock_net(skb->sk); |
d3807145 | 1755 | struct net *tgt_net = net; |
eec4df98 ED |
1756 | int h, s_h; |
1757 | int idx, s_idx; | |
1c98eca4 | 1758 | int s_ip_idx; |
1da177e4 LT |
1759 | struct net_device *dev; |
1760 | struct in_device *in_dev; | |
eec4df98 | 1761 | struct hlist_head *head; |
d7e38611 | 1762 | int err = 0; |
1da177e4 | 1763 | |
eec4df98 ED |
1764 | s_h = cb->args[0]; |
1765 | s_idx = idx = cb->args[1]; | |
1c98eca4 | 1766 | s_ip_idx = cb->args[2]; |
eec4df98 | 1767 | |
c33078e3 | 1768 | if (cb->strict_check) { |
c33078e3 | 1769 | err = inet_valid_dump_ifaddr_req(nlh, &fillargs, &tgt_net, |
5fcd266a | 1770 | skb->sk, cb); |
c33078e3 | 1771 | if (err < 0) |
d7e38611 | 1772 | goto put_tgt_net; |
5fcd266a | 1773 | |
d7e38611 | 1774 | err = 0; |
5fcd266a DA |
1775 | if (fillargs.ifindex) { |
1776 | dev = __dev_get_by_index(tgt_net, fillargs.ifindex); | |
d7e38611 DA |
1777 | if (!dev) { |
1778 | err = -ENODEV; | |
1779 | goto put_tgt_net; | |
1780 | } | |
5fcd266a DA |
1781 | |
1782 | in_dev = __in_dev_get_rtnl(dev); | |
1783 | if (in_dev) { | |
1784 | err = in_dev_dump_addr(in_dev, skb, cb, s_ip_idx, | |
1785 | &fillargs); | |
1786 | } | |
1787 | goto put_tgt_net; | |
1788 | } | |
d3807145 CB |
1789 | } |
1790 | ||
eec4df98 ED |
1791 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
1792 | idx = 0; | |
d3807145 | 1793 | head = &tgt_net->dev_index_head[h]; |
eec4df98 | 1794 | rcu_read_lock(); |
d3807145 CB |
1795 | cb->seq = atomic_read(&tgt_net->ipv4.dev_addr_genid) ^ |
1796 | tgt_net->dev_base_seq; | |
b67bfe0d | 1797 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
eec4df98 ED |
1798 | if (idx < s_idx) |
1799 | goto cont; | |
4b97efdf | 1800 | if (h > s_h || idx > s_idx) |
eec4df98 ED |
1801 | s_ip_idx = 0; |
1802 | in_dev = __in_dev_get_rcu(dev); | |
1803 | if (!in_dev) | |
1804 | goto cont; | |
1da177e4 | 1805 | |
1c98eca4 DA |
1806 | err = in_dev_dump_addr(in_dev, skb, cb, s_ip_idx, |
1807 | &fillargs); | |
1808 | if (err < 0) { | |
1809 | rcu_read_unlock(); | |
1810 | goto done; | |
eec4df98 | 1811 | } |
7562f876 | 1812 | cont: |
eec4df98 ED |
1813 | idx++; |
1814 | } | |
1815 | rcu_read_unlock(); | |
1da177e4 LT |
1816 | } |
1817 | ||
1818 | done: | |
eec4df98 ED |
1819 | cb->args[0] = h; |
1820 | cb->args[1] = idx; | |
5fcd266a | 1821 | put_tgt_net: |
978a46fa | 1822 | if (fillargs.netnsid >= 0) |
d3807145 | 1823 | put_net(tgt_net); |
1da177e4 | 1824 | |
7c1e8a38 | 1825 | return skb->len ? : err; |
1da177e4 LT |
1826 | } |
1827 | ||
539afedf | 1828 | static void rtmsg_ifa(int event, struct in_ifaddr *ifa, struct nlmsghdr *nlh, |
15e47304 | 1829 | u32 portid) |
1da177e4 | 1830 | { |
978a46fa CB |
1831 | struct inet_fill_args fillargs = { |
1832 | .portid = portid, | |
1833 | .seq = nlh ? nlh->nlmsg_seq : 0, | |
1834 | .event = event, | |
1835 | .flags = 0, | |
1836 | .netnsid = -1, | |
1837 | }; | |
47f68512 | 1838 | struct sk_buff *skb; |
d6062cbb | 1839 | int err = -ENOBUFS; |
4b8aa9ab | 1840 | struct net *net; |
1da177e4 | 1841 | |
c346dca1 | 1842 | net = dev_net(ifa->ifa_dev->dev); |
339bf98f | 1843 | skb = nlmsg_new(inet_nlmsg_size(), GFP_KERNEL); |
51456b29 | 1844 | if (!skb) |
d6062cbb TG |
1845 | goto errout; |
1846 | ||
978a46fa | 1847 | err = inet_fill_ifaddr(skb, ifa, &fillargs); |
26932566 PM |
1848 | if (err < 0) { |
1849 | /* -EMSGSIZE implies BUG in inet_nlmsg_size() */ | |
1850 | WARN_ON(err == -EMSGSIZE); | |
1851 | kfree_skb(skb); | |
1852 | goto errout; | |
1853 | } | |
15e47304 | 1854 | rtnl_notify(skb, net, portid, RTNLGRP_IPV4_IFADDR, nlh, GFP_KERNEL); |
1ce85fe4 | 1855 | return; |
d6062cbb TG |
1856 | errout: |
1857 | if (err < 0) | |
4b8aa9ab | 1858 | rtnl_set_sk_err(net, RTNLGRP_IPV4_IFADDR, err); |
1da177e4 LT |
1859 | } |
1860 | ||
b1974ed0 AR |
1861 | static size_t inet_get_link_af_size(const struct net_device *dev, |
1862 | u32 ext_filter_mask) | |
9f0f7272 | 1863 | { |
1fc19aff | 1864 | struct in_device *in_dev = rcu_dereference_rtnl(dev->ip_ptr); |
9f0f7272 TG |
1865 | |
1866 | if (!in_dev) | |
1867 | return 0; | |
1868 | ||
1869 | return nla_total_size(IPV4_DEVCONF_MAX * 4); /* IFLA_INET_CONF */ | |
1870 | } | |
1871 | ||
d5566fd7 SV |
1872 | static int inet_fill_link_af(struct sk_buff *skb, const struct net_device *dev, |
1873 | u32 ext_filter_mask) | |
9f0f7272 | 1874 | { |
1fc19aff | 1875 | struct in_device *in_dev = rcu_dereference_rtnl(dev->ip_ptr); |
9f0f7272 TG |
1876 | struct nlattr *nla; |
1877 | int i; | |
1878 | ||
1879 | if (!in_dev) | |
1880 | return -ENODATA; | |
1881 | ||
1882 | nla = nla_reserve(skb, IFLA_INET_CONF, IPV4_DEVCONF_MAX * 4); | |
51456b29 | 1883 | if (!nla) |
9f0f7272 TG |
1884 | return -EMSGSIZE; |
1885 | ||
1886 | for (i = 0; i < IPV4_DEVCONF_MAX; i++) | |
1887 | ((u32 *) nla_data(nla))[i] = in_dev->cnf.data[i]; | |
1888 | ||
1889 | return 0; | |
1890 | } | |
1891 | ||
1892 | static const struct nla_policy inet_af_policy[IFLA_INET_MAX+1] = { | |
1893 | [IFLA_INET_CONF] = { .type = NLA_NESTED }, | |
1894 | }; | |
1895 | ||
cf7afbfe TG |
1896 | static int inet_validate_link_af(const struct net_device *dev, |
1897 | const struct nlattr *nla) | |
9f0f7272 | 1898 | { |
9f0f7272 TG |
1899 | struct nlattr *a, *tb[IFLA_INET_MAX+1]; |
1900 | int err, rem; | |
1901 | ||
5fa85a09 | 1902 | if (dev && !__in_dev_get_rcu(dev)) |
cf7afbfe | 1903 | return -EAFNOSUPPORT; |
9f0f7272 | 1904 | |
8cb08174 JB |
1905 | err = nla_parse_nested_deprecated(tb, IFLA_INET_MAX, nla, |
1906 | inet_af_policy, NULL); | |
9f0f7272 TG |
1907 | if (err < 0) |
1908 | return err; | |
1909 | ||
1910 | if (tb[IFLA_INET_CONF]) { | |
1911 | nla_for_each_nested(a, tb[IFLA_INET_CONF], rem) { | |
1912 | int cfgid = nla_type(a); | |
1913 | ||
1914 | if (nla_len(a) < 4) | |
1915 | return -EINVAL; | |
1916 | ||
1917 | if (cfgid <= 0 || cfgid > IPV4_DEVCONF_MAX) | |
1918 | return -EINVAL; | |
1919 | } | |
1920 | } | |
1921 | ||
cf7afbfe TG |
1922 | return 0; |
1923 | } | |
1924 | ||
1925 | static int inet_set_link_af(struct net_device *dev, const struct nlattr *nla) | |
1926 | { | |
5fa85a09 | 1927 | struct in_device *in_dev = __in_dev_get_rcu(dev); |
cf7afbfe TG |
1928 | struct nlattr *a, *tb[IFLA_INET_MAX+1]; |
1929 | int rem; | |
1930 | ||
1931 | if (!in_dev) | |
1932 | return -EAFNOSUPPORT; | |
1933 | ||
8cb08174 | 1934 | if (nla_parse_nested_deprecated(tb, IFLA_INET_MAX, nla, NULL, NULL) < 0) |
cf7afbfe TG |
1935 | BUG(); |
1936 | ||
9f0f7272 TG |
1937 | if (tb[IFLA_INET_CONF]) { |
1938 | nla_for_each_nested(a, tb[IFLA_INET_CONF], rem) | |
1939 | ipv4_devconf_set(in_dev, nla_type(a), nla_get_u32(a)); | |
1940 | } | |
1941 | ||
1942 | return 0; | |
1943 | } | |
1944 | ||
edc9e748 ND |
1945 | static int inet_netconf_msgsize_devconf(int type) |
1946 | { | |
1947 | int size = NLMSG_ALIGN(sizeof(struct netconfmsg)) | |
1948 | + nla_total_size(4); /* NETCONFA_IFINDEX */ | |
136ba622 | 1949 | bool all = false; |
edc9e748 | 1950 | |
136ba622 ZS |
1951 | if (type == NETCONFA_ALL) |
1952 | all = true; | |
1953 | ||
1954 | if (all || type == NETCONFA_FORWARDING) | |
edc9e748 | 1955 | size += nla_total_size(4); |
136ba622 | 1956 | if (all || type == NETCONFA_RP_FILTER) |
cc535dfb | 1957 | size += nla_total_size(4); |
136ba622 | 1958 | if (all || type == NETCONFA_MC_FORWARDING) |
d67b8c61 | 1959 | size += nla_total_size(4); |
5cbf777c XL |
1960 | if (all || type == NETCONFA_BC_FORWARDING) |
1961 | size += nla_total_size(4); | |
136ba622 | 1962 | if (all || type == NETCONFA_PROXY_NEIGH) |
f085ff1c | 1963 | size += nla_total_size(4); |
136ba622 | 1964 | if (all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) |
974d7af5 | 1965 | size += nla_total_size(4); |
edc9e748 ND |
1966 | |
1967 | return size; | |
1968 | } | |
1969 | ||
1970 | static int inet_netconf_fill_devconf(struct sk_buff *skb, int ifindex, | |
1971 | struct ipv4_devconf *devconf, u32 portid, | |
1972 | u32 seq, int event, unsigned int flags, | |
1973 | int type) | |
1974 | { | |
1975 | struct nlmsghdr *nlh; | |
1976 | struct netconfmsg *ncm; | |
136ba622 | 1977 | bool all = false; |
edc9e748 ND |
1978 | |
1979 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg), | |
1980 | flags); | |
51456b29 | 1981 | if (!nlh) |
edc9e748 ND |
1982 | return -EMSGSIZE; |
1983 | ||
136ba622 ZS |
1984 | if (type == NETCONFA_ALL) |
1985 | all = true; | |
1986 | ||
edc9e748 ND |
1987 | ncm = nlmsg_data(nlh); |
1988 | ncm->ncm_family = AF_INET; | |
1989 | ||
1990 | if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0) | |
1991 | goto nla_put_failure; | |
1992 | ||
b5c9641d DA |
1993 | if (!devconf) |
1994 | goto out; | |
1995 | ||
136ba622 | 1996 | if ((all || type == NETCONFA_FORWARDING) && |
edc9e748 ND |
1997 | nla_put_s32(skb, NETCONFA_FORWARDING, |
1998 | IPV4_DEVCONF(*devconf, FORWARDING)) < 0) | |
1999 | goto nla_put_failure; | |
136ba622 | 2000 | if ((all || type == NETCONFA_RP_FILTER) && |
cc535dfb ND |
2001 | nla_put_s32(skb, NETCONFA_RP_FILTER, |
2002 | IPV4_DEVCONF(*devconf, RP_FILTER)) < 0) | |
2003 | goto nla_put_failure; | |
136ba622 | 2004 | if ((all || type == NETCONFA_MC_FORWARDING) && |
d67b8c61 ND |
2005 | nla_put_s32(skb, NETCONFA_MC_FORWARDING, |
2006 | IPV4_DEVCONF(*devconf, MC_FORWARDING)) < 0) | |
2007 | goto nla_put_failure; | |
5cbf777c XL |
2008 | if ((all || type == NETCONFA_BC_FORWARDING) && |
2009 | nla_put_s32(skb, NETCONFA_BC_FORWARDING, | |
2010 | IPV4_DEVCONF(*devconf, BC_FORWARDING)) < 0) | |
2011 | goto nla_put_failure; | |
136ba622 | 2012 | if ((all || type == NETCONFA_PROXY_NEIGH) && |
09aea5df | 2013 | nla_put_s32(skb, NETCONFA_PROXY_NEIGH, |
f085ff1c | 2014 | IPV4_DEVCONF(*devconf, PROXY_ARP)) < 0) |
2015 | goto nla_put_failure; | |
136ba622 | 2016 | if ((all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) && |
974d7af5 AG |
2017 | nla_put_s32(skb, NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, |
2018 | IPV4_DEVCONF(*devconf, IGNORE_ROUTES_WITH_LINKDOWN)) < 0) | |
2019 | goto nla_put_failure; | |
edc9e748 | 2020 | |
b5c9641d | 2021 | out: |
053c095a JB |
2022 | nlmsg_end(skb, nlh); |
2023 | return 0; | |
edc9e748 ND |
2024 | |
2025 | nla_put_failure: | |
2026 | nlmsg_cancel(skb, nlh); | |
2027 | return -EMSGSIZE; | |
2028 | } | |
2029 | ||
3b022865 DA |
2030 | void inet_netconf_notify_devconf(struct net *net, int event, int type, |
2031 | int ifindex, struct ipv4_devconf *devconf) | |
edc9e748 ND |
2032 | { |
2033 | struct sk_buff *skb; | |
2034 | int err = -ENOBUFS; | |
2035 | ||
fa17806c | 2036 | skb = nlmsg_new(inet_netconf_msgsize_devconf(type), GFP_KERNEL); |
51456b29 | 2037 | if (!skb) |
edc9e748 ND |
2038 | goto errout; |
2039 | ||
2040 | err = inet_netconf_fill_devconf(skb, ifindex, devconf, 0, 0, | |
3b022865 | 2041 | event, 0, type); |
edc9e748 ND |
2042 | if (err < 0) { |
2043 | /* -EMSGSIZE implies BUG in inet_netconf_msgsize_devconf() */ | |
2044 | WARN_ON(err == -EMSGSIZE); | |
2045 | kfree_skb(skb); | |
2046 | goto errout; | |
2047 | } | |
fa17806c | 2048 | rtnl_notify(skb, net, 0, RTNLGRP_IPV4_NETCONF, NULL, GFP_KERNEL); |
edc9e748 ND |
2049 | return; |
2050 | errout: | |
2051 | if (err < 0) | |
2052 | rtnl_set_sk_err(net, RTNLGRP_IPV4_NETCONF, err); | |
2053 | } | |
2054 | ||
9e551110 ND |
2055 | static const struct nla_policy devconf_ipv4_policy[NETCONFA_MAX+1] = { |
2056 | [NETCONFA_IFINDEX] = { .len = sizeof(int) }, | |
2057 | [NETCONFA_FORWARDING] = { .len = sizeof(int) }, | |
cc535dfb | 2058 | [NETCONFA_RP_FILTER] = { .len = sizeof(int) }, |
09aea5df | 2059 | [NETCONFA_PROXY_NEIGH] = { .len = sizeof(int) }, |
974d7af5 | 2060 | [NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN] = { .len = sizeof(int) }, |
9e551110 ND |
2061 | }; |
2062 | ||
eede370d JK |
2063 | static int inet_netconf_valid_get_req(struct sk_buff *skb, |
2064 | const struct nlmsghdr *nlh, | |
2065 | struct nlattr **tb, | |
2066 | struct netlink_ext_ack *extack) | |
2067 | { | |
2068 | int i, err; | |
2069 | ||
2070 | if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(struct netconfmsg))) { | |
2071 | NL_SET_ERR_MSG(extack, "ipv4: Invalid header for netconf get request"); | |
2072 | return -EINVAL; | |
2073 | } | |
2074 | ||
2075 | if (!netlink_strict_get_check(skb)) | |
8cb08174 JB |
2076 | return nlmsg_parse_deprecated(nlh, sizeof(struct netconfmsg), |
2077 | tb, NETCONFA_MAX, | |
2078 | devconf_ipv4_policy, extack); | |
eede370d | 2079 | |
8cb08174 JB |
2080 | err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct netconfmsg), |
2081 | tb, NETCONFA_MAX, | |
2082 | devconf_ipv4_policy, extack); | |
eede370d JK |
2083 | if (err) |
2084 | return err; | |
2085 | ||
2086 | for (i = 0; i <= NETCONFA_MAX; i++) { | |
2087 | if (!tb[i]) | |
2088 | continue; | |
2089 | ||
2090 | switch (i) { | |
2091 | case NETCONFA_IFINDEX: | |
2092 | break; | |
2093 | default: | |
2094 | NL_SET_ERR_MSG(extack, "ipv4: Unsupported attribute in netconf get request"); | |
2095 | return -EINVAL; | |
2096 | } | |
2097 | } | |
2098 | ||
2099 | return 0; | |
2100 | } | |
2101 | ||
9e551110 | 2102 | static int inet_netconf_get_devconf(struct sk_buff *in_skb, |
c21ef3e3 DA |
2103 | struct nlmsghdr *nlh, |
2104 | struct netlink_ext_ack *extack) | |
9e551110 ND |
2105 | { |
2106 | struct net *net = sock_net(in_skb->sk); | |
2107 | struct nlattr *tb[NETCONFA_MAX+1]; | |
9e551110 ND |
2108 | struct sk_buff *skb; |
2109 | struct ipv4_devconf *devconf; | |
2110 | struct in_device *in_dev; | |
2111 | struct net_device *dev; | |
2112 | int ifindex; | |
2113 | int err; | |
2114 | ||
eede370d JK |
2115 | err = inet_netconf_valid_get_req(in_skb, nlh, tb, extack); |
2116 | if (err) | |
9e551110 ND |
2117 | goto errout; |
2118 | ||
a97eb33f | 2119 | err = -EINVAL; |
9e551110 ND |
2120 | if (!tb[NETCONFA_IFINDEX]) |
2121 | goto errout; | |
2122 | ||
2123 | ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]); | |
2124 | switch (ifindex) { | |
2125 | case NETCONFA_IFINDEX_ALL: | |
2126 | devconf = net->ipv4.devconf_all; | |
2127 | break; | |
2128 | case NETCONFA_IFINDEX_DEFAULT: | |
2129 | devconf = net->ipv4.devconf_dflt; | |
2130 | break; | |
2131 | default: | |
2132 | dev = __dev_get_by_index(net, ifindex); | |
51456b29 | 2133 | if (!dev) |
9e551110 ND |
2134 | goto errout; |
2135 | in_dev = __in_dev_get_rtnl(dev); | |
51456b29 | 2136 | if (!in_dev) |
9e551110 ND |
2137 | goto errout; |
2138 | devconf = &in_dev->cnf; | |
2139 | break; | |
2140 | } | |
2141 | ||
2142 | err = -ENOBUFS; | |
fa17806c | 2143 | skb = nlmsg_new(inet_netconf_msgsize_devconf(NETCONFA_ALL), GFP_KERNEL); |
51456b29 | 2144 | if (!skb) |
9e551110 ND |
2145 | goto errout; |
2146 | ||
2147 | err = inet_netconf_fill_devconf(skb, ifindex, devconf, | |
2148 | NETLINK_CB(in_skb).portid, | |
2149 | nlh->nlmsg_seq, RTM_NEWNETCONF, 0, | |
136ba622 | 2150 | NETCONFA_ALL); |
9e551110 ND |
2151 | if (err < 0) { |
2152 | /* -EMSGSIZE implies BUG in inet_netconf_msgsize_devconf() */ | |
2153 | WARN_ON(err == -EMSGSIZE); | |
2154 | kfree_skb(skb); | |
2155 | goto errout; | |
2156 | } | |
2157 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); | |
2158 | errout: | |
2159 | return err; | |
2160 | } | |
2161 | ||
7a674200 ND |
2162 | static int inet_netconf_dump_devconf(struct sk_buff *skb, |
2163 | struct netlink_callback *cb) | |
2164 | { | |
addd383f | 2165 | const struct nlmsghdr *nlh = cb->nlh; |
7a674200 ND |
2166 | struct net *net = sock_net(skb->sk); |
2167 | int h, s_h; | |
2168 | int idx, s_idx; | |
2169 | struct net_device *dev; | |
2170 | struct in_device *in_dev; | |
2171 | struct hlist_head *head; | |
2172 | ||
addd383f DA |
2173 | if (cb->strict_check) { |
2174 | struct netlink_ext_ack *extack = cb->extack; | |
2175 | struct netconfmsg *ncm; | |
2176 | ||
2177 | if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ncm))) { | |
2178 | NL_SET_ERR_MSG(extack, "ipv4: Invalid header for netconf dump request"); | |
2179 | return -EINVAL; | |
2180 | } | |
2181 | ||
2182 | if (nlmsg_attrlen(nlh, sizeof(*ncm))) { | |
2183 | NL_SET_ERR_MSG(extack, "ipv4: Invalid data after header in netconf dump request"); | |
2184 | return -EINVAL; | |
2185 | } | |
2186 | } | |
2187 | ||
7a674200 ND |
2188 | s_h = cb->args[0]; |
2189 | s_idx = idx = cb->args[1]; | |
2190 | ||
2191 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
2192 | idx = 0; | |
2193 | head = &net->dev_index_head[h]; | |
2194 | rcu_read_lock(); | |
0465277f ND |
2195 | cb->seq = atomic_read(&net->ipv4.dev_addr_genid) ^ |
2196 | net->dev_base_seq; | |
7a674200 ND |
2197 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
2198 | if (idx < s_idx) | |
2199 | goto cont; | |
2200 | in_dev = __in_dev_get_rcu(dev); | |
2201 | if (!in_dev) | |
2202 | goto cont; | |
2203 | ||
2204 | if (inet_netconf_fill_devconf(skb, dev->ifindex, | |
2205 | &in_dev->cnf, | |
2206 | NETLINK_CB(cb->skb).portid, | |
addd383f | 2207 | nlh->nlmsg_seq, |
7a674200 ND |
2208 | RTM_NEWNETCONF, |
2209 | NLM_F_MULTI, | |
136ba622 | 2210 | NETCONFA_ALL) < 0) { |
7a674200 ND |
2211 | rcu_read_unlock(); |
2212 | goto done; | |
2213 | } | |
0465277f | 2214 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
7a674200 ND |
2215 | cont: |
2216 | idx++; | |
2217 | } | |
2218 | rcu_read_unlock(); | |
2219 | } | |
2220 | if (h == NETDEV_HASHENTRIES) { | |
2221 | if (inet_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL, | |
2222 | net->ipv4.devconf_all, | |
2223 | NETLINK_CB(cb->skb).portid, | |
addd383f | 2224 | nlh->nlmsg_seq, |
7a674200 | 2225 | RTM_NEWNETCONF, NLM_F_MULTI, |
136ba622 | 2226 | NETCONFA_ALL) < 0) |
7a674200 ND |
2227 | goto done; |
2228 | else | |
2229 | h++; | |
2230 | } | |
2231 | if (h == NETDEV_HASHENTRIES + 1) { | |
2232 | if (inet_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT, | |
2233 | net->ipv4.devconf_dflt, | |
2234 | NETLINK_CB(cb->skb).portid, | |
addd383f | 2235 | nlh->nlmsg_seq, |
7a674200 | 2236 | RTM_NEWNETCONF, NLM_F_MULTI, |
136ba622 | 2237 | NETCONFA_ALL) < 0) |
7a674200 ND |
2238 | goto done; |
2239 | else | |
2240 | h++; | |
2241 | } | |
2242 | done: | |
2243 | cb->args[0] = h; | |
2244 | cb->args[1] = idx; | |
2245 | ||
2246 | return skb->len; | |
2247 | } | |
2248 | ||
1da177e4 LT |
2249 | #ifdef CONFIG_SYSCTL |
2250 | ||
c0ce9fb3 | 2251 | static void devinet_copy_dflt_conf(struct net *net, int i) |
31be3085 HX |
2252 | { |
2253 | struct net_device *dev; | |
2254 | ||
c6d14c84 ED |
2255 | rcu_read_lock(); |
2256 | for_each_netdev_rcu(net, dev) { | |
31be3085 | 2257 | struct in_device *in_dev; |
c6d14c84 | 2258 | |
31be3085 HX |
2259 | in_dev = __in_dev_get_rcu(dev); |
2260 | if (in_dev && !test_bit(i, in_dev->cnf.state)) | |
9355bbd6 | 2261 | in_dev->cnf.data[i] = net->ipv4.devconf_dflt->data[i]; |
31be3085 | 2262 | } |
c6d14c84 | 2263 | rcu_read_unlock(); |
31be3085 HX |
2264 | } |
2265 | ||
c6d14c84 | 2266 | /* called with RTNL locked */ |
c0ce9fb3 | 2267 | static void inet_forward_change(struct net *net) |
68dd299b PE |
2268 | { |
2269 | struct net_device *dev; | |
586f1211 | 2270 | int on = IPV4_DEVCONF_ALL(net, FORWARDING); |
68dd299b | 2271 | |
586f1211 | 2272 | IPV4_DEVCONF_ALL(net, ACCEPT_REDIRECTS) = !on; |
9355bbd6 | 2273 | IPV4_DEVCONF_DFLT(net, FORWARDING) = on; |
3b022865 DA |
2274 | inet_netconf_notify_devconf(net, RTM_NEWNETCONF, |
2275 | NETCONFA_FORWARDING, | |
edc9e748 ND |
2276 | NETCONFA_IFINDEX_ALL, |
2277 | net->ipv4.devconf_all); | |
3b022865 DA |
2278 | inet_netconf_notify_devconf(net, RTM_NEWNETCONF, |
2279 | NETCONFA_FORWARDING, | |
edc9e748 ND |
2280 | NETCONFA_IFINDEX_DEFAULT, |
2281 | net->ipv4.devconf_dflt); | |
68dd299b | 2282 | |
c0ce9fb3 | 2283 | for_each_netdev(net, dev) { |
68dd299b | 2284 | struct in_device *in_dev; |
fa17806c | 2285 | |
0187bdfb BH |
2286 | if (on) |
2287 | dev_disable_lro(dev); | |
fa17806c ED |
2288 | |
2289 | in_dev = __in_dev_get_rtnl(dev); | |
edc9e748 | 2290 | if (in_dev) { |
68dd299b | 2291 | IN_DEV_CONF_SET(in_dev, FORWARDING, on); |
3b022865 DA |
2292 | inet_netconf_notify_devconf(net, RTM_NEWNETCONF, |
2293 | NETCONFA_FORWARDING, | |
edc9e748 ND |
2294 | dev->ifindex, &in_dev->cnf); |
2295 | } | |
68dd299b | 2296 | } |
68dd299b PE |
2297 | } |
2298 | ||
f085ff1c | 2299 | static int devinet_conf_ifindex(struct net *net, struct ipv4_devconf *cnf) |
2300 | { | |
2301 | if (cnf == net->ipv4.devconf_dflt) | |
2302 | return NETCONFA_IFINDEX_DEFAULT; | |
2303 | else if (cnf == net->ipv4.devconf_all) | |
2304 | return NETCONFA_IFINDEX_ALL; | |
2305 | else { | |
2306 | struct in_device *idev | |
2307 | = container_of(cnf, struct in_device, cnf); | |
2308 | return idev->dev->ifindex; | |
2309 | } | |
2310 | } | |
2311 | ||
fe2c6338 | 2312 | static int devinet_conf_proc(struct ctl_table *ctl, int write, |
8d65af78 | 2313 | void __user *buffer, |
31be3085 HX |
2314 | size_t *lenp, loff_t *ppos) |
2315 | { | |
d01ff0a0 | 2316 | int old_value = *(int *)ctl->data; |
8d65af78 | 2317 | int ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
d01ff0a0 | 2318 | int new_value = *(int *)ctl->data; |
31be3085 HX |
2319 | |
2320 | if (write) { | |
2321 | struct ipv4_devconf *cnf = ctl->extra1; | |
c0ce9fb3 | 2322 | struct net *net = ctl->extra2; |
31be3085 | 2323 | int i = (int *)ctl->data - cnf->data; |
f085ff1c | 2324 | int ifindex; |
31be3085 HX |
2325 | |
2326 | set_bit(i, cnf->state); | |
2327 | ||
9355bbd6 | 2328 | if (cnf == net->ipv4.devconf_dflt) |
c0ce9fb3 | 2329 | devinet_copy_dflt_conf(net, i); |
d0daebc3 TG |
2330 | if (i == IPV4_DEVCONF_ACCEPT_LOCAL - 1 || |
2331 | i == IPV4_DEVCONF_ROUTE_LOCALNET - 1) | |
d01ff0a0 | 2332 | if ((new_value == 0) && (old_value != 0)) |
4ccfe6d4 | 2333 | rt_cache_flush(net); |
f085ff1c | 2334 | |
5cbf777c XL |
2335 | if (i == IPV4_DEVCONF_BC_FORWARDING - 1 && |
2336 | new_value != old_value) | |
2337 | rt_cache_flush(net); | |
2338 | ||
cc535dfb ND |
2339 | if (i == IPV4_DEVCONF_RP_FILTER - 1 && |
2340 | new_value != old_value) { | |
f085ff1c | 2341 | ifindex = devinet_conf_ifindex(net, cnf); |
3b022865 DA |
2342 | inet_netconf_notify_devconf(net, RTM_NEWNETCONF, |
2343 | NETCONFA_RP_FILTER, | |
cc535dfb ND |
2344 | ifindex, cnf); |
2345 | } | |
f085ff1c | 2346 | if (i == IPV4_DEVCONF_PROXY_ARP - 1 && |
2347 | new_value != old_value) { | |
2348 | ifindex = devinet_conf_ifindex(net, cnf); | |
3b022865 DA |
2349 | inet_netconf_notify_devconf(net, RTM_NEWNETCONF, |
2350 | NETCONFA_PROXY_NEIGH, | |
f085ff1c | 2351 | ifindex, cnf); |
2352 | } | |
974d7af5 AG |
2353 | if (i == IPV4_DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN - 1 && |
2354 | new_value != old_value) { | |
2355 | ifindex = devinet_conf_ifindex(net, cnf); | |
3b022865 DA |
2356 | inet_netconf_notify_devconf(net, RTM_NEWNETCONF, |
2357 | NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, | |
974d7af5 AG |
2358 | ifindex, cnf); |
2359 | } | |
31be3085 HX |
2360 | } |
2361 | ||
2362 | return ret; | |
2363 | } | |
2364 | ||
fe2c6338 | 2365 | static int devinet_sysctl_forward(struct ctl_table *ctl, int write, |
8d65af78 | 2366 | void __user *buffer, |
1da177e4 LT |
2367 | size_t *lenp, loff_t *ppos) |
2368 | { | |
2369 | int *valp = ctl->data; | |
2370 | int val = *valp; | |
88af182e | 2371 | loff_t pos = *ppos; |
8d65af78 | 2372 | int ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
1da177e4 LT |
2373 | |
2374 | if (write && *valp != val) { | |
c0ce9fb3 PE |
2375 | struct net *net = ctl->extra2; |
2376 | ||
0187bdfb | 2377 | if (valp != &IPV4_DEVCONF_DFLT(net, FORWARDING)) { |
88af182e EB |
2378 | if (!rtnl_trylock()) { |
2379 | /* Restore the original values before restarting */ | |
2380 | *valp = val; | |
2381 | *ppos = pos; | |
9b8adb5e | 2382 | return restart_syscall(); |
88af182e | 2383 | } |
0187bdfb BH |
2384 | if (valp == &IPV4_DEVCONF_ALL(net, FORWARDING)) { |
2385 | inet_forward_change(net); | |
edc9e748 | 2386 | } else { |
0187bdfb BH |
2387 | struct ipv4_devconf *cnf = ctl->extra1; |
2388 | struct in_device *idev = | |
2389 | container_of(cnf, struct in_device, cnf); | |
edc9e748 ND |
2390 | if (*valp) |
2391 | dev_disable_lro(idev->dev); | |
3b022865 | 2392 | inet_netconf_notify_devconf(net, RTM_NEWNETCONF, |
edc9e748 ND |
2393 | NETCONFA_FORWARDING, |
2394 | idev->dev->ifindex, | |
2395 | cnf); | |
0187bdfb BH |
2396 | } |
2397 | rtnl_unlock(); | |
4ccfe6d4 | 2398 | rt_cache_flush(net); |
edc9e748 | 2399 | } else |
3b022865 DA |
2400 | inet_netconf_notify_devconf(net, RTM_NEWNETCONF, |
2401 | NETCONFA_FORWARDING, | |
edc9e748 ND |
2402 | NETCONFA_IFINDEX_DEFAULT, |
2403 | net->ipv4.devconf_dflt); | |
1da177e4 LT |
2404 | } |
2405 | ||
2406 | return ret; | |
2407 | } | |
2408 | ||
fe2c6338 | 2409 | static int ipv4_doint_and_flush(struct ctl_table *ctl, int write, |
323e126f DM |
2410 | void __user *buffer, |
2411 | size_t *lenp, loff_t *ppos) | |
1da177e4 LT |
2412 | { |
2413 | int *valp = ctl->data; | |
2414 | int val = *valp; | |
8d65af78 | 2415 | int ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
76e6ebfb | 2416 | struct net *net = ctl->extra2; |
1da177e4 LT |
2417 | |
2418 | if (write && *valp != val) | |
4ccfe6d4 | 2419 | rt_cache_flush(net); |
1da177e4 LT |
2420 | |
2421 | return ret; | |
2422 | } | |
2423 | ||
f8572d8f | 2424 | #define DEVINET_SYSCTL_ENTRY(attr, name, mval, proc) \ |
42f811b8 | 2425 | { \ |
42f811b8 HX |
2426 | .procname = name, \ |
2427 | .data = ipv4_devconf.data + \ | |
02291680 | 2428 | IPV4_DEVCONF_ ## attr - 1, \ |
42f811b8 HX |
2429 | .maxlen = sizeof(int), \ |
2430 | .mode = mval, \ | |
2431 | .proc_handler = proc, \ | |
31be3085 | 2432 | .extra1 = &ipv4_devconf, \ |
42f811b8 HX |
2433 | } |
2434 | ||
2435 | #define DEVINET_SYSCTL_RW_ENTRY(attr, name) \ | |
f8572d8f | 2436 | DEVINET_SYSCTL_ENTRY(attr, name, 0644, devinet_conf_proc) |
42f811b8 HX |
2437 | |
2438 | #define DEVINET_SYSCTL_RO_ENTRY(attr, name) \ | |
f8572d8f | 2439 | DEVINET_SYSCTL_ENTRY(attr, name, 0444, devinet_conf_proc) |
42f811b8 | 2440 | |
f8572d8f EB |
2441 | #define DEVINET_SYSCTL_COMPLEX_ENTRY(attr, name, proc) \ |
2442 | DEVINET_SYSCTL_ENTRY(attr, name, 0644, proc) | |
42f811b8 HX |
2443 | |
2444 | #define DEVINET_SYSCTL_FLUSHING_ENTRY(attr, name) \ | |
f8572d8f | 2445 | DEVINET_SYSCTL_COMPLEX_ENTRY(attr, name, ipv4_doint_and_flush) |
42f811b8 | 2446 | |
1da177e4 LT |
2447 | static struct devinet_sysctl_table { |
2448 | struct ctl_table_header *sysctl_header; | |
02291680 | 2449 | struct ctl_table devinet_vars[__IPV4_DEVCONF_MAX]; |
1da177e4 LT |
2450 | } devinet_sysctl = { |
2451 | .devinet_vars = { | |
42f811b8 | 2452 | DEVINET_SYSCTL_COMPLEX_ENTRY(FORWARDING, "forwarding", |
f8572d8f | 2453 | devinet_sysctl_forward), |
42f811b8 | 2454 | DEVINET_SYSCTL_RO_ENTRY(MC_FORWARDING, "mc_forwarding"), |
5cbf777c | 2455 | DEVINET_SYSCTL_RW_ENTRY(BC_FORWARDING, "bc_forwarding"), |
42f811b8 HX |
2456 | |
2457 | DEVINET_SYSCTL_RW_ENTRY(ACCEPT_REDIRECTS, "accept_redirects"), | |
2458 | DEVINET_SYSCTL_RW_ENTRY(SECURE_REDIRECTS, "secure_redirects"), | |
2459 | DEVINET_SYSCTL_RW_ENTRY(SHARED_MEDIA, "shared_media"), | |
2460 | DEVINET_SYSCTL_RW_ENTRY(RP_FILTER, "rp_filter"), | |
2461 | DEVINET_SYSCTL_RW_ENTRY(SEND_REDIRECTS, "send_redirects"), | |
2462 | DEVINET_SYSCTL_RW_ENTRY(ACCEPT_SOURCE_ROUTE, | |
2463 | "accept_source_route"), | |
8153a10c | 2464 | DEVINET_SYSCTL_RW_ENTRY(ACCEPT_LOCAL, "accept_local"), |
28f6aeea | 2465 | DEVINET_SYSCTL_RW_ENTRY(SRC_VMARK, "src_valid_mark"), |
42f811b8 HX |
2466 | DEVINET_SYSCTL_RW_ENTRY(PROXY_ARP, "proxy_arp"), |
2467 | DEVINET_SYSCTL_RW_ENTRY(MEDIUM_ID, "medium_id"), | |
2468 | DEVINET_SYSCTL_RW_ENTRY(BOOTP_RELAY, "bootp_relay"), | |
2469 | DEVINET_SYSCTL_RW_ENTRY(LOG_MARTIANS, "log_martians"), | |
2470 | DEVINET_SYSCTL_RW_ENTRY(TAG, "tag"), | |
2471 | DEVINET_SYSCTL_RW_ENTRY(ARPFILTER, "arp_filter"), | |
2472 | DEVINET_SYSCTL_RW_ENTRY(ARP_ANNOUNCE, "arp_announce"), | |
2473 | DEVINET_SYSCTL_RW_ENTRY(ARP_IGNORE, "arp_ignore"), | |
2474 | DEVINET_SYSCTL_RW_ENTRY(ARP_ACCEPT, "arp_accept"), | |
eefef1cf | 2475 | DEVINET_SYSCTL_RW_ENTRY(ARP_NOTIFY, "arp_notify"), |
65324144 | 2476 | DEVINET_SYSCTL_RW_ENTRY(PROXY_ARP_PVLAN, "proxy_arp_pvlan"), |
5c6fe01c WM |
2477 | DEVINET_SYSCTL_RW_ENTRY(FORCE_IGMP_VERSION, |
2478 | "force_igmp_version"), | |
2690048c WM |
2479 | DEVINET_SYSCTL_RW_ENTRY(IGMPV2_UNSOLICITED_REPORT_INTERVAL, |
2480 | "igmpv2_unsolicited_report_interval"), | |
2481 | DEVINET_SYSCTL_RW_ENTRY(IGMPV3_UNSOLICITED_REPORT_INTERVAL, | |
2482 | "igmpv3_unsolicited_report_interval"), | |
0eeb075f AG |
2483 | DEVINET_SYSCTL_RW_ENTRY(IGNORE_ROUTES_WITH_LINKDOWN, |
2484 | "ignore_routes_with_linkdown"), | |
97daf331 JB |
2485 | DEVINET_SYSCTL_RW_ENTRY(DROP_GRATUITOUS_ARP, |
2486 | "drop_gratuitous_arp"), | |
42f811b8 HX |
2487 | |
2488 | DEVINET_SYSCTL_FLUSHING_ENTRY(NOXFRM, "disable_xfrm"), | |
2489 | DEVINET_SYSCTL_FLUSHING_ENTRY(NOPOLICY, "disable_policy"), | |
42f811b8 HX |
2490 | DEVINET_SYSCTL_FLUSHING_ENTRY(PROMOTE_SECONDARIES, |
2491 | "promote_secondaries"), | |
d0daebc3 TG |
2492 | DEVINET_SYSCTL_FLUSHING_ENTRY(ROUTE_LOCALNET, |
2493 | "route_localnet"), | |
12b74dfa JB |
2494 | DEVINET_SYSCTL_FLUSHING_ENTRY(DROP_UNICAST_IN_L2_MULTICAST, |
2495 | "drop_unicast_in_l2_multicast"), | |
1da177e4 | 2496 | }, |
1da177e4 LT |
2497 | }; |
2498 | ||
ea40b324 | 2499 | static int __devinet_sysctl_register(struct net *net, char *dev_name, |
29c994e3 | 2500 | int ifindex, struct ipv4_devconf *p) |
1da177e4 LT |
2501 | { |
2502 | int i; | |
9fa89642 | 2503 | struct devinet_sysctl_table *t; |
8607ddb8 | 2504 | char path[sizeof("net/ipv4/conf/") + IFNAMSIZ]; |
bfada697 | 2505 | |
9fa89642 | 2506 | t = kmemdup(&devinet_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 | 2507 | if (!t) |
9fa89642 PE |
2508 | goto out; |
2509 | ||
1da177e4 LT |
2510 | for (i = 0; i < ARRAY_SIZE(t->devinet_vars) - 1; i++) { |
2511 | t->devinet_vars[i].data += (char *)p - (char *)&ipv4_devconf; | |
31be3085 | 2512 | t->devinet_vars[i].extra1 = p; |
c0ce9fb3 | 2513 | t->devinet_vars[i].extra2 = net; |
1da177e4 LT |
2514 | } |
2515 | ||
8607ddb8 | 2516 | snprintf(path, sizeof(path), "net/ipv4/conf/%s", dev_name); |
1da177e4 | 2517 | |
8607ddb8 | 2518 | t->sysctl_header = register_net_sysctl(net, path, t->devinet_vars); |
1da177e4 | 2519 | if (!t->sysctl_header) |
8607ddb8 | 2520 | goto free; |
1da177e4 LT |
2521 | |
2522 | p->sysctl = t; | |
29c994e3 | 2523 | |
3b022865 DA |
2524 | inet_netconf_notify_devconf(net, RTM_NEWNETCONF, NETCONFA_ALL, |
2525 | ifindex, p); | |
ea40b324 | 2526 | return 0; |
1da177e4 | 2527 | |
9fa89642 | 2528 | free: |
1da177e4 | 2529 | kfree(t); |
9fa89642 | 2530 | out: |
ea40b324 | 2531 | return -ENOBUFS; |
1da177e4 LT |
2532 | } |
2533 | ||
b5c9641d DA |
2534 | static void __devinet_sysctl_unregister(struct net *net, |
2535 | struct ipv4_devconf *cnf, int ifindex) | |
51602b2a PE |
2536 | { |
2537 | struct devinet_sysctl_table *t = cnf->sysctl; | |
2538 | ||
b5c9641d DA |
2539 | if (t) { |
2540 | cnf->sysctl = NULL; | |
2541 | unregister_net_sysctl_table(t->sysctl_header); | |
2542 | kfree(t); | |
2543 | } | |
51602b2a | 2544 | |
b5c9641d | 2545 | inet_netconf_notify_devconf(net, RTM_DELNETCONF, 0, ifindex, NULL); |
51602b2a PE |
2546 | } |
2547 | ||
20e61da7 | 2548 | static int devinet_sysctl_register(struct in_device *idev) |
66f27a52 | 2549 | { |
20e61da7 WC |
2550 | int err; |
2551 | ||
2552 | if (!sysctl_dev_name_is_allowed(idev->dev->name)) | |
2553 | return -EINVAL; | |
2554 | ||
2555 | err = neigh_sysctl_register(idev->dev, idev->arp_parms, NULL); | |
2556 | if (err) | |
2557 | return err; | |
2558 | err = __devinet_sysctl_register(dev_net(idev->dev), idev->dev->name, | |
29c994e3 | 2559 | idev->dev->ifindex, &idev->cnf); |
20e61da7 WC |
2560 | if (err) |
2561 | neigh_sysctl_unregister(idev->arp_parms); | |
2562 | return err; | |
66f27a52 PE |
2563 | } |
2564 | ||
51602b2a | 2565 | static void devinet_sysctl_unregister(struct in_device *idev) |
1da177e4 | 2566 | { |
b5c9641d DA |
2567 | struct net *net = dev_net(idev->dev); |
2568 | ||
2569 | __devinet_sysctl_unregister(net, &idev->cnf, idev->dev->ifindex); | |
51602b2a | 2570 | neigh_sysctl_unregister(idev->arp_parms); |
1da177e4 | 2571 | } |
1da177e4 | 2572 | |
68dd299b PE |
2573 | static struct ctl_table ctl_forward_entry[] = { |
2574 | { | |
68dd299b PE |
2575 | .procname = "ip_forward", |
2576 | .data = &ipv4_devconf.data[ | |
02291680 | 2577 | IPV4_DEVCONF_FORWARDING - 1], |
68dd299b PE |
2578 | .maxlen = sizeof(int), |
2579 | .mode = 0644, | |
2580 | .proc_handler = devinet_sysctl_forward, | |
68dd299b | 2581 | .extra1 = &ipv4_devconf, |
c0ce9fb3 | 2582 | .extra2 = &init_net, |
68dd299b PE |
2583 | }, |
2584 | { }, | |
2585 | }; | |
2a75de0c | 2586 | #endif |
68dd299b | 2587 | |
752d14dc PE |
2588 | static __net_init int devinet_init_net(struct net *net) |
2589 | { | |
2590 | int err; | |
752d14dc | 2591 | struct ipv4_devconf *all, *dflt; |
2a75de0c | 2592 | #ifdef CONFIG_SYSCTL |
856c395c | 2593 | struct ctl_table *tbl; |
752d14dc | 2594 | struct ctl_table_header *forw_hdr; |
2a75de0c | 2595 | #endif |
752d14dc PE |
2596 | |
2597 | err = -ENOMEM; | |
856c395c CW |
2598 | all = kmemdup(&ipv4_devconf, sizeof(ipv4_devconf), GFP_KERNEL); |
2599 | if (!all) | |
2600 | goto err_alloc_all; | |
752d14dc | 2601 | |
856c395c CW |
2602 | dflt = kmemdup(&ipv4_devconf_dflt, sizeof(ipv4_devconf_dflt), GFP_KERNEL); |
2603 | if (!dflt) | |
2604 | goto err_alloc_dflt; | |
752d14dc | 2605 | |
2a75de0c | 2606 | #ifdef CONFIG_SYSCTL |
856c395c CW |
2607 | tbl = kmemdup(ctl_forward_entry, sizeof(ctl_forward_entry), GFP_KERNEL); |
2608 | if (!tbl) | |
2609 | goto err_alloc_ctl; | |
752d14dc | 2610 | |
856c395c CW |
2611 | tbl[0].data = &all->data[IPV4_DEVCONF_FORWARDING - 1]; |
2612 | tbl[0].extra1 = all; | |
2613 | tbl[0].extra2 = net; | |
2a75de0c | 2614 | #endif |
856c395c | 2615 | |
a154d5d8 AB |
2616 | if ((!IS_ENABLED(CONFIG_SYSCTL) || |
2617 | sysctl_devconf_inherit_init_net != 2) && | |
2618 | !net_eq(net, &init_net)) { | |
856c395c CW |
2619 | memcpy(all, init_net.ipv4.devconf_all, sizeof(ipv4_devconf)); |
2620 | memcpy(dflt, init_net.ipv4.devconf_dflt, sizeof(ipv4_devconf_dflt)); | |
752d14dc PE |
2621 | } |
2622 | ||
2623 | #ifdef CONFIG_SYSCTL | |
29c994e3 | 2624 | err = __devinet_sysctl_register(net, "all", NETCONFA_IFINDEX_ALL, all); |
752d14dc PE |
2625 | if (err < 0) |
2626 | goto err_reg_all; | |
2627 | ||
29c994e3 ND |
2628 | err = __devinet_sysctl_register(net, "default", |
2629 | NETCONFA_IFINDEX_DEFAULT, dflt); | |
752d14dc PE |
2630 | if (err < 0) |
2631 | goto err_reg_dflt; | |
2632 | ||
2633 | err = -ENOMEM; | |
8607ddb8 | 2634 | forw_hdr = register_net_sysctl(net, "net/ipv4", tbl); |
51456b29 | 2635 | if (!forw_hdr) |
752d14dc | 2636 | goto err_reg_ctl; |
2a75de0c | 2637 | net->ipv4.forw_hdr = forw_hdr; |
752d14dc PE |
2638 | #endif |
2639 | ||
752d14dc PE |
2640 | net->ipv4.devconf_all = all; |
2641 | net->ipv4.devconf_dflt = dflt; | |
2642 | return 0; | |
2643 | ||
2644 | #ifdef CONFIG_SYSCTL | |
2645 | err_reg_ctl: | |
b5c9641d | 2646 | __devinet_sysctl_unregister(net, dflt, NETCONFA_IFINDEX_DEFAULT); |
752d14dc | 2647 | err_reg_dflt: |
b5c9641d | 2648 | __devinet_sysctl_unregister(net, all, NETCONFA_IFINDEX_ALL); |
752d14dc | 2649 | err_reg_all: |
856c395c | 2650 | kfree(tbl); |
752d14dc | 2651 | err_alloc_ctl: |
2a75de0c | 2652 | #endif |
856c395c | 2653 | kfree(dflt); |
752d14dc | 2654 | err_alloc_dflt: |
856c395c | 2655 | kfree(all); |
752d14dc PE |
2656 | err_alloc_all: |
2657 | return err; | |
2658 | } | |
2659 | ||
2660 | static __net_exit void devinet_exit_net(struct net *net) | |
2661 | { | |
2a75de0c | 2662 | #ifdef CONFIG_SYSCTL |
752d14dc PE |
2663 | struct ctl_table *tbl; |
2664 | ||
2665 | tbl = net->ipv4.forw_hdr->ctl_table_arg; | |
752d14dc | 2666 | unregister_net_sysctl_table(net->ipv4.forw_hdr); |
b5c9641d DA |
2667 | __devinet_sysctl_unregister(net, net->ipv4.devconf_dflt, |
2668 | NETCONFA_IFINDEX_DEFAULT); | |
2669 | __devinet_sysctl_unregister(net, net->ipv4.devconf_all, | |
2670 | NETCONFA_IFINDEX_ALL); | |
752d14dc | 2671 | kfree(tbl); |
2a75de0c | 2672 | #endif |
752d14dc PE |
2673 | kfree(net->ipv4.devconf_dflt); |
2674 | kfree(net->ipv4.devconf_all); | |
2675 | } | |
2676 | ||
2677 | static __net_initdata struct pernet_operations devinet_ops = { | |
2678 | .init = devinet_init_net, | |
2679 | .exit = devinet_exit_net, | |
2680 | }; | |
2681 | ||
207895fd | 2682 | static struct rtnl_af_ops inet_af_ops __read_mostly = { |
9f0f7272 TG |
2683 | .family = AF_INET, |
2684 | .fill_link_af = inet_fill_link_af, | |
2685 | .get_link_af_size = inet_get_link_af_size, | |
cf7afbfe TG |
2686 | .validate_link_af = inet_validate_link_af, |
2687 | .set_link_af = inet_set_link_af, | |
9f0f7272 TG |
2688 | }; |
2689 | ||
1da177e4 LT |
2690 | void __init devinet_init(void) |
2691 | { | |
fd23c3b3 DM |
2692 | int i; |
2693 | ||
2694 | for (i = 0; i < IN4_ADDR_HSIZE; i++) | |
2695 | INIT_HLIST_HEAD(&inet_addr_lst[i]); | |
2696 | ||
752d14dc PE |
2697 | register_pernet_subsys(&devinet_ops); |
2698 | ||
1da177e4 LT |
2699 | register_gifconf(PF_INET, inet_gifconf); |
2700 | register_netdevice_notifier(&ip_netdev_notifier); | |
63f3444f | 2701 | |
906e073f | 2702 | queue_delayed_work(system_power_efficient_wq, &check_lifetime_work, 0); |
5c766d64 | 2703 | |
9f0f7272 TG |
2704 | rtnl_af_register(&inet_af_ops); |
2705 | ||
b97bac64 FW |
2706 | rtnl_register(PF_INET, RTM_NEWADDR, inet_rtm_newaddr, NULL, 0); |
2707 | rtnl_register(PF_INET, RTM_DELADDR, inet_rtm_deladdr, NULL, 0); | |
2708 | rtnl_register(PF_INET, RTM_GETADDR, NULL, inet_dump_ifaddr, 0); | |
9e551110 | 2709 | rtnl_register(PF_INET, RTM_GETNETCONF, inet_netconf_get_devconf, |
b97bac64 | 2710 | inet_netconf_dump_devconf, 0); |
1da177e4 | 2711 | } |