Commit | Line | Data |
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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 | |
2e605463 MC |
65 | #define IPV6ONLY_FLAGS \ |
66 | (IFA_F_NODAD | IFA_F_OPTIMISTIC | IFA_F_DADFAILED | \ | |
67 | IFA_F_HOMEADDRESS | IFA_F_TENTATIVE | \ | |
68 | IFA_F_MANAGETEMPADDR | IFA_F_STABLE_PRIVACY) | |
69 | ||
0027ba84 | 70 | static struct ipv4_devconf ipv4_devconf = { |
42f811b8 | 71 | .data = { |
02291680 EB |
72 | [IPV4_DEVCONF_ACCEPT_REDIRECTS - 1] = 1, |
73 | [IPV4_DEVCONF_SEND_REDIRECTS - 1] = 1, | |
74 | [IPV4_DEVCONF_SECURE_REDIRECTS - 1] = 1, | |
75 | [IPV4_DEVCONF_SHARED_MEDIA - 1] = 1, | |
2690048c WM |
76 | [IPV4_DEVCONF_IGMPV2_UNSOLICITED_REPORT_INTERVAL - 1] = 10000 /*ms*/, |
77 | [IPV4_DEVCONF_IGMPV3_UNSOLICITED_REPORT_INTERVAL - 1] = 1000 /*ms*/, | |
42f811b8 | 78 | }, |
1da177e4 LT |
79 | }; |
80 | ||
81 | static struct ipv4_devconf ipv4_devconf_dflt = { | |
42f811b8 | 82 | .data = { |
02291680 EB |
83 | [IPV4_DEVCONF_ACCEPT_REDIRECTS - 1] = 1, |
84 | [IPV4_DEVCONF_SEND_REDIRECTS - 1] = 1, | |
85 | [IPV4_DEVCONF_SECURE_REDIRECTS - 1] = 1, | |
86 | [IPV4_DEVCONF_SHARED_MEDIA - 1] = 1, | |
87 | [IPV4_DEVCONF_ACCEPT_SOURCE_ROUTE - 1] = 1, | |
2690048c WM |
88 | [IPV4_DEVCONF_IGMPV2_UNSOLICITED_REPORT_INTERVAL - 1] = 10000 /*ms*/, |
89 | [IPV4_DEVCONF_IGMPV3_UNSOLICITED_REPORT_INTERVAL - 1] = 1000 /*ms*/, | |
42f811b8 | 90 | }, |
1da177e4 LT |
91 | }; |
92 | ||
9355bbd6 PE |
93 | #define IPV4_DEVCONF_DFLT(net, attr) \ |
94 | IPV4_DEVCONF((*net->ipv4.devconf_dflt), attr) | |
42f811b8 | 95 | |
ef7c79ed | 96 | static const struct nla_policy ifa_ipv4_policy[IFA_MAX+1] = { |
5c753978 TG |
97 | [IFA_LOCAL] = { .type = NLA_U32 }, |
98 | [IFA_ADDRESS] = { .type = NLA_U32 }, | |
99 | [IFA_BROADCAST] = { .type = NLA_U32 }, | |
5176f91e | 100 | [IFA_LABEL] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, |
5c766d64 | 101 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, |
ad6c8135 | 102 | [IFA_FLAGS] = { .type = NLA_U32 }, |
af4d768a | 103 | [IFA_RT_PRIORITY] = { .type = NLA_U32 }, |
d3807145 | 104 | [IFA_TARGET_NETNSID] = { .type = NLA_S32 }, |
5c753978 TG |
105 | }; |
106 | ||
978a46fa CB |
107 | struct inet_fill_args { |
108 | u32 portid; | |
109 | u32 seq; | |
110 | int event; | |
111 | unsigned int flags; | |
112 | int netnsid; | |
5fcd266a | 113 | int ifindex; |
978a46fa CB |
114 | }; |
115 | ||
40384999 ED |
116 | #define IN4_ADDR_HSIZE_SHIFT 8 |
117 | #define IN4_ADDR_HSIZE (1U << IN4_ADDR_HSIZE_SHIFT) | |
118 | ||
fd23c3b3 | 119 | static struct hlist_head inet_addr_lst[IN4_ADDR_HSIZE]; |
fd23c3b3 | 120 | |
6eada011 | 121 | static u32 inet_addr_hash(const struct net *net, __be32 addr) |
fd23c3b3 | 122 | { |
40384999 | 123 | u32 val = (__force u32) addr ^ net_hash_mix(net); |
fd23c3b3 | 124 | |
40384999 | 125 | return hash_32(val, IN4_ADDR_HSIZE_SHIFT); |
fd23c3b3 DM |
126 | } |
127 | ||
128 | static void inet_hash_insert(struct net *net, struct in_ifaddr *ifa) | |
129 | { | |
40384999 | 130 | u32 hash = inet_addr_hash(net, ifa->ifa_local); |
fd23c3b3 | 131 | |
32a4be48 | 132 | ASSERT_RTNL(); |
fd23c3b3 | 133 | hlist_add_head_rcu(&ifa->hash, &inet_addr_lst[hash]); |
fd23c3b3 DM |
134 | } |
135 | ||
136 | static void inet_hash_remove(struct in_ifaddr *ifa) | |
137 | { | |
32a4be48 | 138 | ASSERT_RTNL(); |
fd23c3b3 | 139 | hlist_del_init_rcu(&ifa->hash); |
fd23c3b3 DM |
140 | } |
141 | ||
9435eb1c DM |
142 | /** |
143 | * __ip_dev_find - find the first device with a given source address. | |
144 | * @net: the net namespace | |
145 | * @addr: the source address | |
146 | * @devref: if true, take a reference on the found device | |
147 | * | |
148 | * If a caller uses devref=false, it should be protected by RCU, or RTNL | |
149 | */ | |
150 | struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref) | |
151 | { | |
9435eb1c DM |
152 | struct net_device *result = NULL; |
153 | struct in_ifaddr *ifa; | |
9435eb1c DM |
154 | |
155 | rcu_read_lock(); | |
6e617de8 PA |
156 | ifa = inet_lookup_ifaddr_rcu(net, addr); |
157 | if (!ifa) { | |
406b6f97 DM |
158 | struct flowi4 fl4 = { .daddr = addr }; |
159 | struct fib_result res = { 0 }; | |
160 | struct fib_table *local; | |
161 | ||
162 | /* Fallback to FIB local table so that communication | |
163 | * over loopback subnets work. | |
164 | */ | |
165 | local = fib_get_table(net, RT_TABLE_LOCAL); | |
166 | if (local && | |
167 | !fib_table_lookup(local, &fl4, &res, FIB_LOOKUP_NOREF) && | |
168 | res.type == RTN_LOCAL) | |
169 | result = FIB_RES_DEV(res); | |
6e617de8 PA |
170 | } else { |
171 | result = ifa->ifa_dev->dev; | |
406b6f97 | 172 | } |
9435eb1c DM |
173 | if (result && devref) |
174 | dev_hold(result); | |
175 | rcu_read_unlock(); | |
176 | return result; | |
177 | } | |
178 | EXPORT_SYMBOL(__ip_dev_find); | |
179 | ||
6e617de8 PA |
180 | /* called under RCU lock */ |
181 | struct in_ifaddr *inet_lookup_ifaddr_rcu(struct net *net, __be32 addr) | |
182 | { | |
183 | u32 hash = inet_addr_hash(net, addr); | |
184 | struct in_ifaddr *ifa; | |
185 | ||
186 | hlist_for_each_entry_rcu(ifa, &inet_addr_lst[hash], hash) | |
187 | if (ifa->ifa_local == addr && | |
188 | net_eq(dev_net(ifa->ifa_dev->dev), net)) | |
189 | return ifa; | |
190 | ||
191 | return NULL; | |
192 | } | |
193 | ||
d6062cbb | 194 | static void rtmsg_ifa(int event, struct in_ifaddr *, struct nlmsghdr *, u32); |
1da177e4 | 195 | |
e041c683 | 196 | static BLOCKING_NOTIFIER_HEAD(inetaddr_chain); |
3ad7d246 | 197 | static BLOCKING_NOTIFIER_HEAD(inetaddr_validator_chain); |
2638eb8b FW |
198 | static void inet_del_ifa(struct in_device *in_dev, |
199 | struct in_ifaddr __rcu **ifap, | |
1da177e4 LT |
200 | int destroy); |
201 | #ifdef CONFIG_SYSCTL | |
20e61da7 | 202 | static int devinet_sysctl_register(struct in_device *idev); |
51602b2a PE |
203 | static void devinet_sysctl_unregister(struct in_device *idev); |
204 | #else | |
20e61da7 | 205 | static int devinet_sysctl_register(struct in_device *idev) |
51602b2a | 206 | { |
20e61da7 | 207 | return 0; |
51602b2a | 208 | } |
40384999 | 209 | static void devinet_sysctl_unregister(struct in_device *idev) |
51602b2a PE |
210 | { |
211 | } | |
1da177e4 LT |
212 | #endif |
213 | ||
214 | /* Locks all the inet devices. */ | |
215 | ||
216 | static struct in_ifaddr *inet_alloc_ifa(void) | |
217 | { | |
93adcc80 | 218 | return kzalloc(sizeof(struct in_ifaddr), GFP_KERNEL); |
1da177e4 LT |
219 | } |
220 | ||
221 | static void inet_rcu_free_ifa(struct rcu_head *head) | |
222 | { | |
223 | struct in_ifaddr *ifa = container_of(head, struct in_ifaddr, rcu_head); | |
224 | if (ifa->ifa_dev) | |
225 | in_dev_put(ifa->ifa_dev); | |
226 | kfree(ifa); | |
227 | } | |
228 | ||
40384999 | 229 | static void inet_free_ifa(struct in_ifaddr *ifa) |
1da177e4 LT |
230 | { |
231 | call_rcu(&ifa->rcu_head, inet_rcu_free_ifa); | |
232 | } | |
233 | ||
234 | void in_dev_finish_destroy(struct in_device *idev) | |
235 | { | |
236 | struct net_device *dev = idev->dev; | |
237 | ||
547b792c IJ |
238 | WARN_ON(idev->ifa_list); |
239 | WARN_ON(idev->mc_list); | |
e9897071 | 240 | kfree(rcu_dereference_protected(idev->mc_hash, 1)); |
1da177e4 | 241 | #ifdef NET_REFCNT_DEBUG |
91df42be | 242 | pr_debug("%s: %p=%s\n", __func__, idev, dev ? dev->name : "NIL"); |
1da177e4 LT |
243 | #endif |
244 | dev_put(dev); | |
245 | if (!idev->dead) | |
9f9354b9 ED |
246 | pr_err("Freeing alive in_device %p\n", idev); |
247 | else | |
1da177e4 | 248 | kfree(idev); |
1da177e4 | 249 | } |
9f9354b9 | 250 | EXPORT_SYMBOL(in_dev_finish_destroy); |
1da177e4 | 251 | |
71e27da9 | 252 | static struct in_device *inetdev_init(struct net_device *dev) |
1da177e4 LT |
253 | { |
254 | struct in_device *in_dev; | |
20e61da7 | 255 | int err = -ENOMEM; |
1da177e4 LT |
256 | |
257 | ASSERT_RTNL(); | |
258 | ||
0da974f4 | 259 | in_dev = kzalloc(sizeof(*in_dev), GFP_KERNEL); |
1da177e4 LT |
260 | if (!in_dev) |
261 | goto out; | |
c346dca1 | 262 | memcpy(&in_dev->cnf, dev_net(dev)->ipv4.devconf_dflt, |
9355bbd6 | 263 | sizeof(in_dev->cnf)); |
1da177e4 LT |
264 | in_dev->cnf.sysctl = NULL; |
265 | in_dev->dev = dev; | |
9f9354b9 ED |
266 | in_dev->arp_parms = neigh_parms_alloc(dev, &arp_tbl); |
267 | if (!in_dev->arp_parms) | |
1da177e4 | 268 | goto out_kfree; |
0187bdfb BH |
269 | if (IPV4_DEVCONF(in_dev->cnf, FORWARDING)) |
270 | dev_disable_lro(dev); | |
1da177e4 LT |
271 | /* Reference in_dev->dev */ |
272 | dev_hold(dev); | |
30c4cf57 | 273 | /* Account for reference dev->ip_ptr (below) */ |
7658b36f | 274 | refcount_set(&in_dev->refcnt, 1); |
1da177e4 | 275 | |
20e61da7 WC |
276 | err = devinet_sysctl_register(in_dev); |
277 | if (err) { | |
278 | in_dev->dead = 1; | |
1b49cd71 | 279 | neigh_parms_release(&arp_tbl, in_dev->arp_parms); |
20e61da7 WC |
280 | in_dev_put(in_dev); |
281 | in_dev = NULL; | |
282 | goto out; | |
283 | } | |
1da177e4 LT |
284 | ip_mc_init_dev(in_dev); |
285 | if (dev->flags & IFF_UP) | |
286 | ip_mc_up(in_dev); | |
483479ec | 287 | |
30c4cf57 | 288 | /* we can receive as soon as ip_ptr is set -- do this last */ |
cf778b00 | 289 | rcu_assign_pointer(dev->ip_ptr, in_dev); |
483479ec | 290 | out: |
20e61da7 | 291 | return in_dev ?: ERR_PTR(err); |
1da177e4 LT |
292 | out_kfree: |
293 | kfree(in_dev); | |
294 | in_dev = NULL; | |
295 | goto out; | |
296 | } | |
297 | ||
298 | static void in_dev_rcu_put(struct rcu_head *head) | |
299 | { | |
300 | struct in_device *idev = container_of(head, struct in_device, rcu_head); | |
301 | in_dev_put(idev); | |
302 | } | |
303 | ||
304 | static void inetdev_destroy(struct in_device *in_dev) | |
305 | { | |
1da177e4 | 306 | struct net_device *dev; |
2638eb8b | 307 | struct in_ifaddr *ifa; |
1da177e4 LT |
308 | |
309 | ASSERT_RTNL(); | |
310 | ||
311 | dev = in_dev->dev; | |
1da177e4 LT |
312 | |
313 | in_dev->dead = 1; | |
314 | ||
315 | ip_mc_destroy_dev(in_dev); | |
316 | ||
2638eb8b | 317 | while ((ifa = rtnl_dereference(in_dev->ifa_list)) != NULL) { |
1da177e4 LT |
318 | inet_del_ifa(in_dev, &in_dev->ifa_list, 0); |
319 | inet_free_ifa(ifa); | |
320 | } | |
321 | ||
a9b3cd7f | 322 | RCU_INIT_POINTER(dev->ip_ptr, NULL); |
1da177e4 | 323 | |
51602b2a | 324 | devinet_sysctl_unregister(in_dev); |
1da177e4 LT |
325 | neigh_parms_release(&arp_tbl, in_dev->arp_parms); |
326 | arp_ifdown(dev); | |
327 | ||
328 | call_rcu(&in_dev->rcu_head, in_dev_rcu_put); | |
329 | } | |
330 | ||
ff428d72 | 331 | int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b) |
1da177e4 | 332 | { |
d519e870 FW |
333 | const struct in_ifaddr *ifa; |
334 | ||
1da177e4 | 335 | rcu_read_lock(); |
d519e870 | 336 | in_dev_for_each_ifa_rcu(ifa, in_dev) { |
1da177e4 LT |
337 | if (inet_ifa_match(a, ifa)) { |
338 | if (!b || inet_ifa_match(b, ifa)) { | |
339 | rcu_read_unlock(); | |
340 | return 1; | |
341 | } | |
342 | } | |
d519e870 | 343 | } |
1da177e4 LT |
344 | rcu_read_unlock(); |
345 | return 0; | |
346 | } | |
347 | ||
2638eb8b FW |
348 | static void __inet_del_ifa(struct in_device *in_dev, |
349 | struct in_ifaddr __rcu **ifap, | |
350 | int destroy, struct nlmsghdr *nlh, u32 portid) | |
1da177e4 | 351 | { |
8f937c60 | 352 | struct in_ifaddr *promote = NULL; |
2638eb8b FW |
353 | struct in_ifaddr *ifa, *ifa1; |
354 | struct in_ifaddr *last_prim; | |
0ff60a45 JHS |
355 | struct in_ifaddr *prev_prom = NULL; |
356 | int do_promote = IN_DEV_PROMOTE_SECONDARIES(in_dev); | |
1da177e4 LT |
357 | |
358 | ASSERT_RTNL(); | |
359 | ||
2638eb8b FW |
360 | ifa1 = rtnl_dereference(*ifap); |
361 | last_prim = rtnl_dereference(in_dev->ifa_list); | |
fbd40ea0 DM |
362 | if (in_dev->dead) |
363 | goto no_promotions; | |
364 | ||
e905a9ed | 365 | /* 1. Deleting primary ifaddr forces deletion all secondaries |
8f937c60 HW |
366 | * unless alias promotion is set |
367 | **/ | |
1da177e4 LT |
368 | |
369 | if (!(ifa1->ifa_flags & IFA_F_SECONDARY)) { | |
2638eb8b | 370 | struct in_ifaddr __rcu **ifap1 = &ifa1->ifa_next; |
1da177e4 | 371 | |
2638eb8b | 372 | while ((ifa = rtnl_dereference(*ifap1)) != NULL) { |
e905a9ed | 373 | if (!(ifa->ifa_flags & IFA_F_SECONDARY) && |
0ff60a45 JHS |
374 | ifa1->ifa_scope <= ifa->ifa_scope) |
375 | last_prim = ifa; | |
376 | ||
1da177e4 LT |
377 | if (!(ifa->ifa_flags & IFA_F_SECONDARY) || |
378 | ifa1->ifa_mask != ifa->ifa_mask || | |
379 | !inet_ifa_match(ifa1->ifa_address, ifa)) { | |
380 | ifap1 = &ifa->ifa_next; | |
0ff60a45 | 381 | prev_prom = ifa; |
1da177e4 LT |
382 | continue; |
383 | } | |
384 | ||
0ff60a45 | 385 | if (!do_promote) { |
fd23c3b3 | 386 | inet_hash_remove(ifa); |
8f937c60 | 387 | *ifap1 = ifa->ifa_next; |
1da177e4 | 388 | |
15e47304 | 389 | rtmsg_ifa(RTM_DELADDR, ifa, nlh, portid); |
e041c683 AS |
390 | blocking_notifier_call_chain(&inetaddr_chain, |
391 | NETDEV_DOWN, ifa); | |
8f937c60 HW |
392 | inet_free_ifa(ifa); |
393 | } else { | |
394 | promote = ifa; | |
395 | break; | |
396 | } | |
1da177e4 LT |
397 | } |
398 | } | |
399 | ||
2d230e2b JA |
400 | /* On promotion all secondaries from subnet are changing |
401 | * the primary IP, we must remove all their routes silently | |
402 | * and later to add them back with new prefsrc. Do this | |
403 | * while all addresses are on the device list. | |
404 | */ | |
2638eb8b | 405 | for (ifa = promote; ifa; ifa = rtnl_dereference(ifa->ifa_next)) { |
2d230e2b JA |
406 | if (ifa1->ifa_mask == ifa->ifa_mask && |
407 | inet_ifa_match(ifa1->ifa_address, ifa)) | |
408 | fib_del_ifaddr(ifa, ifa1); | |
409 | } | |
410 | ||
fbd40ea0 | 411 | no_promotions: |
1da177e4 LT |
412 | /* 2. Unlink it */ |
413 | ||
414 | *ifap = ifa1->ifa_next; | |
fd23c3b3 | 415 | inet_hash_remove(ifa1); |
1da177e4 LT |
416 | |
417 | /* 3. Announce address deletion */ | |
418 | ||
419 | /* Send message first, then call notifier. | |
420 | At first sight, FIB update triggered by notifier | |
421 | will refer to already deleted ifaddr, that could confuse | |
422 | netlink listeners. It is not true: look, gated sees | |
423 | that route deleted and if it still thinks that ifaddr | |
424 | is valid, it will try to restore deleted routes... Grr. | |
425 | So that, this order is correct. | |
426 | */ | |
15e47304 | 427 | rtmsg_ifa(RTM_DELADDR, ifa1, nlh, portid); |
e041c683 | 428 | blocking_notifier_call_chain(&inetaddr_chain, NETDEV_DOWN, ifa1); |
1da177e4 | 429 | |
0ff60a45 | 430 | if (promote) { |
2638eb8b | 431 | struct in_ifaddr *next_sec; |
0ff60a45 | 432 | |
2638eb8b | 433 | next_sec = rtnl_dereference(promote->ifa_next); |
0ff60a45 | 434 | if (prev_prom) { |
2638eb8b FW |
435 | struct in_ifaddr *last_sec; |
436 | ||
2638eb8b | 437 | rcu_assign_pointer(prev_prom->ifa_next, next_sec); |
6a9e9cea FW |
438 | |
439 | last_sec = rtnl_dereference(last_prim->ifa_next); | |
2638eb8b FW |
440 | rcu_assign_pointer(promote->ifa_next, last_sec); |
441 | rcu_assign_pointer(last_prim->ifa_next, promote); | |
0ff60a45 | 442 | } |
8f937c60 | 443 | |
8f937c60 | 444 | promote->ifa_flags &= ~IFA_F_SECONDARY; |
15e47304 | 445 | rtmsg_ifa(RTM_NEWADDR, promote, nlh, portid); |
e041c683 AS |
446 | blocking_notifier_call_chain(&inetaddr_chain, |
447 | NETDEV_UP, promote); | |
2638eb8b FW |
448 | for (ifa = next_sec; ifa; |
449 | ifa = rtnl_dereference(ifa->ifa_next)) { | |
0ff60a45 JHS |
450 | if (ifa1->ifa_mask != ifa->ifa_mask || |
451 | !inet_ifa_match(ifa1->ifa_address, ifa)) | |
452 | continue; | |
453 | fib_add_ifaddr(ifa); | |
454 | } | |
455 | ||
456 | } | |
6363097c | 457 | if (destroy) |
0ff60a45 | 458 | inet_free_ifa(ifa1); |
1da177e4 LT |
459 | } |
460 | ||
2638eb8b FW |
461 | static void inet_del_ifa(struct in_device *in_dev, |
462 | struct in_ifaddr __rcu **ifap, | |
d6062cbb TG |
463 | int destroy) |
464 | { | |
465 | __inet_del_ifa(in_dev, ifap, destroy, NULL, 0); | |
466 | } | |
467 | ||
5c766d64 JP |
468 | static void check_lifetime(struct work_struct *work); |
469 | ||
470 | static DECLARE_DELAYED_WORK(check_lifetime_work, check_lifetime); | |
471 | ||
d6062cbb | 472 | static int __inet_insert_ifa(struct in_ifaddr *ifa, struct nlmsghdr *nlh, |
de95e047 | 473 | u32 portid, struct netlink_ext_ack *extack) |
1da177e4 | 474 | { |
2638eb8b | 475 | struct in_ifaddr __rcu **last_primary, **ifap; |
1da177e4 | 476 | struct in_device *in_dev = ifa->ifa_dev; |
3ad7d246 | 477 | struct in_validator_info ivi; |
2638eb8b | 478 | struct in_ifaddr *ifa1; |
3ad7d246 | 479 | int ret; |
1da177e4 LT |
480 | |
481 | ASSERT_RTNL(); | |
482 | ||
483 | if (!ifa->ifa_local) { | |
484 | inet_free_ifa(ifa); | |
485 | return 0; | |
486 | } | |
487 | ||
488 | ifa->ifa_flags &= ~IFA_F_SECONDARY; | |
489 | last_primary = &in_dev->ifa_list; | |
490 | ||
2e605463 MC |
491 | /* Don't set IPv6 only flags to IPv4 addresses */ |
492 | ifa->ifa_flags &= ~IPV6ONLY_FLAGS; | |
493 | ||
2638eb8b FW |
494 | ifap = &in_dev->ifa_list; |
495 | ifa1 = rtnl_dereference(*ifap); | |
496 | ||
497 | while (ifa1) { | |
1da177e4 LT |
498 | if (!(ifa1->ifa_flags & IFA_F_SECONDARY) && |
499 | ifa->ifa_scope <= ifa1->ifa_scope) | |
500 | last_primary = &ifa1->ifa_next; | |
501 | if (ifa1->ifa_mask == ifa->ifa_mask && | |
502 | inet_ifa_match(ifa1->ifa_address, ifa)) { | |
503 | if (ifa1->ifa_local == ifa->ifa_local) { | |
504 | inet_free_ifa(ifa); | |
505 | return -EEXIST; | |
506 | } | |
507 | if (ifa1->ifa_scope != ifa->ifa_scope) { | |
508 | inet_free_ifa(ifa); | |
509 | return -EINVAL; | |
510 | } | |
511 | ifa->ifa_flags |= IFA_F_SECONDARY; | |
512 | } | |
2638eb8b FW |
513 | |
514 | ifap = &ifa1->ifa_next; | |
515 | ifa1 = rtnl_dereference(*ifap); | |
1da177e4 LT |
516 | } |
517 | ||
3ad7d246 KJ |
518 | /* Allow any devices that wish to register ifaddr validtors to weigh |
519 | * in now, before changes are committed. The rntl lock is serializing | |
520 | * access here, so the state should not change between a validator call | |
521 | * and a final notify on commit. This isn't invoked on promotion under | |
522 | * the assumption that validators are checking the address itself, and | |
523 | * not the flags. | |
524 | */ | |
525 | ivi.ivi_addr = ifa->ifa_address; | |
526 | ivi.ivi_dev = ifa->ifa_dev; | |
de95e047 | 527 | ivi.extack = extack; |
3ad7d246 KJ |
528 | ret = blocking_notifier_call_chain(&inetaddr_validator_chain, |
529 | NETDEV_UP, &ivi); | |
530 | ret = notifier_to_errno(ret); | |
531 | if (ret) { | |
532 | inet_free_ifa(ifa); | |
533 | return ret; | |
534 | } | |
535 | ||
1da177e4 | 536 | if (!(ifa->ifa_flags & IFA_F_SECONDARY)) { |
63862b5b | 537 | prandom_seed((__force u32) ifa->ifa_local); |
1da177e4 LT |
538 | ifap = last_primary; |
539 | } | |
540 | ||
2638eb8b FW |
541 | rcu_assign_pointer(ifa->ifa_next, *ifap); |
542 | rcu_assign_pointer(*ifap, ifa); | |
1da177e4 | 543 | |
fd23c3b3 DM |
544 | inet_hash_insert(dev_net(in_dev->dev), ifa); |
545 | ||
5c766d64 | 546 | cancel_delayed_work(&check_lifetime_work); |
906e073f | 547 | queue_delayed_work(system_power_efficient_wq, &check_lifetime_work, 0); |
5c766d64 | 548 | |
1da177e4 LT |
549 | /* Send message first, then call notifier. |
550 | Notifier will trigger FIB update, so that | |
551 | listeners of netlink will know about new ifaddr */ | |
15e47304 | 552 | rtmsg_ifa(RTM_NEWADDR, ifa, nlh, portid); |
e041c683 | 553 | blocking_notifier_call_chain(&inetaddr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
554 | |
555 | return 0; | |
556 | } | |
557 | ||
d6062cbb TG |
558 | static int inet_insert_ifa(struct in_ifaddr *ifa) |
559 | { | |
de95e047 | 560 | return __inet_insert_ifa(ifa, NULL, 0, NULL); |
d6062cbb TG |
561 | } |
562 | ||
1da177e4 LT |
563 | static int inet_set_ifa(struct net_device *dev, struct in_ifaddr *ifa) |
564 | { | |
e5ed6399 | 565 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
566 | |
567 | ASSERT_RTNL(); | |
568 | ||
569 | if (!in_dev) { | |
71e27da9 HX |
570 | inet_free_ifa(ifa); |
571 | return -ENOBUFS; | |
1da177e4 | 572 | } |
71e27da9 | 573 | ipv4_devconf_setall(in_dev); |
1d4c8c29 | 574 | neigh_parms_data_state_setall(in_dev->arp_parms); |
1da177e4 | 575 | if (ifa->ifa_dev != in_dev) { |
547b792c | 576 | WARN_ON(ifa->ifa_dev); |
1da177e4 LT |
577 | in_dev_hold(in_dev); |
578 | ifa->ifa_dev = in_dev; | |
579 | } | |
f97c1e0c | 580 | if (ipv4_is_loopback(ifa->ifa_local)) |
1da177e4 LT |
581 | ifa->ifa_scope = RT_SCOPE_HOST; |
582 | return inet_insert_ifa(ifa); | |
583 | } | |
584 | ||
8723e1b4 ED |
585 | /* Caller must hold RCU or RTNL : |
586 | * We dont take a reference on found in_device | |
587 | */ | |
7fee0ca2 | 588 | struct in_device *inetdev_by_index(struct net *net, int ifindex) |
1da177e4 LT |
589 | { |
590 | struct net_device *dev; | |
591 | struct in_device *in_dev = NULL; | |
c148fc2e ED |
592 | |
593 | rcu_read_lock(); | |
594 | dev = dev_get_by_index_rcu(net, ifindex); | |
1da177e4 | 595 | if (dev) |
8723e1b4 | 596 | in_dev = rcu_dereference_rtnl(dev->ip_ptr); |
c148fc2e | 597 | rcu_read_unlock(); |
1da177e4 LT |
598 | return in_dev; |
599 | } | |
9f9354b9 | 600 | EXPORT_SYMBOL(inetdev_by_index); |
1da177e4 LT |
601 | |
602 | /* Called only from RTNL semaphored context. No locks. */ | |
603 | ||
60cad5da AV |
604 | struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, |
605 | __be32 mask) | |
1da177e4 | 606 | { |
d519e870 FW |
607 | struct in_ifaddr *ifa; |
608 | ||
1da177e4 LT |
609 | ASSERT_RTNL(); |
610 | ||
d519e870 | 611 | in_dev_for_each_ifa_rtnl(ifa, in_dev) { |
1da177e4 LT |
612 | if (ifa->ifa_mask == mask && inet_ifa_match(prefix, ifa)) |
613 | return ifa; | |
d519e870 | 614 | } |
1da177e4 LT |
615 | return NULL; |
616 | } | |
617 | ||
690cc863 TC |
618 | static int ip_mc_autojoin_config(struct net *net, bool join, |
619 | const struct in_ifaddr *ifa) | |
93a714d6 | 620 | { |
690cc863 | 621 | #if defined(CONFIG_IP_MULTICAST) |
93a714d6 MC |
622 | struct ip_mreqn mreq = { |
623 | .imr_multiaddr.s_addr = ifa->ifa_address, | |
624 | .imr_ifindex = ifa->ifa_dev->dev->ifindex, | |
625 | }; | |
690cc863 | 626 | struct sock *sk = net->ipv4.mc_autojoin_sk; |
93a714d6 MC |
627 | int ret; |
628 | ||
629 | ASSERT_RTNL(); | |
630 | ||
631 | lock_sock(sk); | |
632 | if (join) | |
54ff9ef3 | 633 | ret = ip_mc_join_group(sk, &mreq); |
93a714d6 | 634 | else |
54ff9ef3 | 635 | ret = ip_mc_leave_group(sk, &mreq); |
93a714d6 MC |
636 | release_sock(sk); |
637 | ||
638 | return ret; | |
690cc863 TC |
639 | #else |
640 | return -EOPNOTSUPP; | |
641 | #endif | |
93a714d6 MC |
642 | } |
643 | ||
c21ef3e3 DA |
644 | static int inet_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, |
645 | struct netlink_ext_ack *extack) | |
1da177e4 | 646 | { |
3b1e0a65 | 647 | struct net *net = sock_net(skb->sk); |
2638eb8b | 648 | struct in_ifaddr __rcu **ifap; |
dfdd5fd4 | 649 | struct nlattr *tb[IFA_MAX+1]; |
1da177e4 | 650 | struct in_device *in_dev; |
dfdd5fd4 | 651 | struct ifaddrmsg *ifm; |
2638eb8b | 652 | struct in_ifaddr *ifa; |
30e2379e | 653 | int err; |
1da177e4 LT |
654 | |
655 | ASSERT_RTNL(); | |
656 | ||
8cb08174 JB |
657 | err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFA_MAX, |
658 | ifa_ipv4_policy, extack); | |
dfdd5fd4 TG |
659 | if (err < 0) |
660 | goto errout; | |
661 | ||
662 | ifm = nlmsg_data(nlh); | |
7fee0ca2 | 663 | in_dev = inetdev_by_index(net, ifm->ifa_index); |
51456b29 | 664 | if (!in_dev) { |
dfdd5fd4 TG |
665 | err = -ENODEV; |
666 | goto errout; | |
667 | } | |
668 | ||
2638eb8b | 669 | for (ifap = &in_dev->ifa_list; (ifa = rtnl_dereference(*ifap)) != NULL; |
1da177e4 | 670 | ifap = &ifa->ifa_next) { |
dfdd5fd4 | 671 | if (tb[IFA_LOCAL] && |
67b61f6c | 672 | ifa->ifa_local != nla_get_in_addr(tb[IFA_LOCAL])) |
dfdd5fd4 TG |
673 | continue; |
674 | ||
675 | if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label)) | |
1da177e4 | 676 | continue; |
dfdd5fd4 TG |
677 | |
678 | if (tb[IFA_ADDRESS] && | |
679 | (ifm->ifa_prefixlen != ifa->ifa_prefixlen || | |
67b61f6c | 680 | !inet_ifa_match(nla_get_in_addr(tb[IFA_ADDRESS]), ifa))) |
dfdd5fd4 TG |
681 | continue; |
682 | ||
93a714d6 | 683 | if (ipv4_is_multicast(ifa->ifa_address)) |
690cc863 | 684 | ip_mc_autojoin_config(net, false, ifa); |
15e47304 | 685 | __inet_del_ifa(in_dev, ifap, 1, nlh, NETLINK_CB(skb).portid); |
1da177e4 LT |
686 | return 0; |
687 | } | |
dfdd5fd4 TG |
688 | |
689 | err = -EADDRNOTAVAIL; | |
690 | errout: | |
691 | return err; | |
1da177e4 LT |
692 | } |
693 | ||
5c766d64 JP |
694 | #define INFINITY_LIFE_TIME 0xFFFFFFFF |
695 | ||
696 | static void check_lifetime(struct work_struct *work) | |
697 | { | |
698 | unsigned long now, next, next_sec, next_sched; | |
699 | struct in_ifaddr *ifa; | |
c988d1e8 | 700 | struct hlist_node *n; |
5c766d64 JP |
701 | int i; |
702 | ||
703 | now = jiffies; | |
704 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); | |
705 | ||
5c766d64 | 706 | for (i = 0; i < IN4_ADDR_HSIZE; i++) { |
c988d1e8 JP |
707 | bool change_needed = false; |
708 | ||
709 | rcu_read_lock(); | |
b67bfe0d | 710 | hlist_for_each_entry_rcu(ifa, &inet_addr_lst[i], hash) { |
5c766d64 JP |
711 | unsigned long age; |
712 | ||
713 | if (ifa->ifa_flags & IFA_F_PERMANENT) | |
714 | continue; | |
715 | ||
716 | /* We try to batch several events at once. */ | |
717 | age = (now - ifa->ifa_tstamp + | |
718 | ADDRCONF_TIMER_FUZZ_MINUS) / HZ; | |
719 | ||
720 | if (ifa->ifa_valid_lft != INFINITY_LIFE_TIME && | |
721 | age >= ifa->ifa_valid_lft) { | |
c988d1e8 | 722 | change_needed = true; |
5c766d64 JP |
723 | } else if (ifa->ifa_preferred_lft == |
724 | INFINITY_LIFE_TIME) { | |
725 | continue; | |
726 | } else if (age >= ifa->ifa_preferred_lft) { | |
727 | if (time_before(ifa->ifa_tstamp + | |
728 | ifa->ifa_valid_lft * HZ, next)) | |
729 | next = ifa->ifa_tstamp + | |
730 | ifa->ifa_valid_lft * HZ; | |
731 | ||
c988d1e8 JP |
732 | if (!(ifa->ifa_flags & IFA_F_DEPRECATED)) |
733 | change_needed = true; | |
5c766d64 JP |
734 | } else if (time_before(ifa->ifa_tstamp + |
735 | ifa->ifa_preferred_lft * HZ, | |
736 | next)) { | |
737 | next = ifa->ifa_tstamp + | |
738 | ifa->ifa_preferred_lft * HZ; | |
739 | } | |
740 | } | |
c988d1e8 JP |
741 | rcu_read_unlock(); |
742 | if (!change_needed) | |
743 | continue; | |
744 | rtnl_lock(); | |
745 | hlist_for_each_entry_safe(ifa, n, &inet_addr_lst[i], hash) { | |
746 | unsigned long age; | |
747 | ||
748 | if (ifa->ifa_flags & IFA_F_PERMANENT) | |
749 | continue; | |
750 | ||
751 | /* We try to batch several events at once. */ | |
752 | age = (now - ifa->ifa_tstamp + | |
753 | ADDRCONF_TIMER_FUZZ_MINUS) / HZ; | |
754 | ||
755 | if (ifa->ifa_valid_lft != INFINITY_LIFE_TIME && | |
756 | age >= ifa->ifa_valid_lft) { | |
2638eb8b FW |
757 | struct in_ifaddr __rcu **ifap; |
758 | struct in_ifaddr *tmp; | |
759 | ||
760 | ifap = &ifa->ifa_dev->ifa_list; | |
761 | tmp = rtnl_dereference(*ifap); | |
762 | while (tmp) { | |
40008e92 | 763 | if (tmp == ifa) { |
c988d1e8 JP |
764 | inet_del_ifa(ifa->ifa_dev, |
765 | ifap, 1); | |
766 | break; | |
767 | } | |
2638eb8b FW |
768 | ifap = &tmp->ifa_next; |
769 | tmp = rtnl_dereference(*ifap); | |
c988d1e8 JP |
770 | } |
771 | } else if (ifa->ifa_preferred_lft != | |
772 | INFINITY_LIFE_TIME && | |
773 | age >= ifa->ifa_preferred_lft && | |
774 | !(ifa->ifa_flags & IFA_F_DEPRECATED)) { | |
775 | ifa->ifa_flags |= IFA_F_DEPRECATED; | |
776 | rtmsg_ifa(RTM_NEWADDR, ifa, NULL, 0); | |
777 | } | |
778 | } | |
779 | rtnl_unlock(); | |
5c766d64 | 780 | } |
5c766d64 JP |
781 | |
782 | next_sec = round_jiffies_up(next); | |
783 | next_sched = next; | |
784 | ||
785 | /* If rounded timeout is accurate enough, accept it. */ | |
786 | if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) | |
787 | next_sched = next_sec; | |
788 | ||
789 | now = jiffies; | |
790 | /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ | |
791 | if (time_before(next_sched, now + ADDRCONF_TIMER_FUZZ_MAX)) | |
792 | next_sched = now + ADDRCONF_TIMER_FUZZ_MAX; | |
793 | ||
906e073f | 794 | queue_delayed_work(system_power_efficient_wq, &check_lifetime_work, |
795 | next_sched - now); | |
5c766d64 JP |
796 | } |
797 | ||
798 | static void set_ifa_lifetime(struct in_ifaddr *ifa, __u32 valid_lft, | |
799 | __u32 prefered_lft) | |
800 | { | |
801 | unsigned long timeout; | |
802 | ||
803 | ifa->ifa_flags &= ~(IFA_F_PERMANENT | IFA_F_DEPRECATED); | |
804 | ||
805 | timeout = addrconf_timeout_fixup(valid_lft, HZ); | |
806 | if (addrconf_finite_timeout(timeout)) | |
807 | ifa->ifa_valid_lft = timeout; | |
808 | else | |
809 | ifa->ifa_flags |= IFA_F_PERMANENT; | |
810 | ||
811 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); | |
812 | if (addrconf_finite_timeout(timeout)) { | |
813 | if (timeout == 0) | |
814 | ifa->ifa_flags |= IFA_F_DEPRECATED; | |
815 | ifa->ifa_preferred_lft = timeout; | |
816 | } | |
817 | ifa->ifa_tstamp = jiffies; | |
818 | if (!ifa->ifa_cstamp) | |
819 | ifa->ifa_cstamp = ifa->ifa_tstamp; | |
820 | } | |
821 | ||
822 | static struct in_ifaddr *rtm_to_ifaddr(struct net *net, struct nlmsghdr *nlh, | |
dac9c979 DA |
823 | __u32 *pvalid_lft, __u32 *pprefered_lft, |
824 | struct netlink_ext_ack *extack) | |
1da177e4 | 825 | { |
5c753978 TG |
826 | struct nlattr *tb[IFA_MAX+1]; |
827 | struct in_ifaddr *ifa; | |
828 | struct ifaddrmsg *ifm; | |
1da177e4 LT |
829 | struct net_device *dev; |
830 | struct in_device *in_dev; | |
7b218574 | 831 | int err; |
1da177e4 | 832 | |
8cb08174 JB |
833 | err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFA_MAX, |
834 | ifa_ipv4_policy, extack); | |
5c753978 TG |
835 | if (err < 0) |
836 | goto errout; | |
1da177e4 | 837 | |
5c753978 | 838 | ifm = nlmsg_data(nlh); |
7b218574 | 839 | err = -EINVAL; |
51456b29 | 840 | if (ifm->ifa_prefixlen > 32 || !tb[IFA_LOCAL]) |
5c753978 | 841 | goto errout; |
1da177e4 | 842 | |
4b8aa9ab | 843 | dev = __dev_get_by_index(net, ifm->ifa_index); |
7b218574 | 844 | err = -ENODEV; |
51456b29 | 845 | if (!dev) |
5c753978 | 846 | goto errout; |
1da177e4 | 847 | |
5c753978 | 848 | in_dev = __in_dev_get_rtnl(dev); |
7b218574 | 849 | err = -ENOBUFS; |
51456b29 | 850 | if (!in_dev) |
71e27da9 | 851 | goto errout; |
1da177e4 | 852 | |
5c753978 | 853 | ifa = inet_alloc_ifa(); |
51456b29 | 854 | if (!ifa) |
5c753978 TG |
855 | /* |
856 | * A potential indev allocation can be left alive, it stays | |
857 | * assigned to its device and is destroy with it. | |
858 | */ | |
5c753978 | 859 | goto errout; |
5c753978 | 860 | |
a4e65d36 | 861 | ipv4_devconf_setall(in_dev); |
1d4c8c29 | 862 | neigh_parms_data_state_setall(in_dev->arp_parms); |
5c753978 TG |
863 | in_dev_hold(in_dev); |
864 | ||
51456b29 | 865 | if (!tb[IFA_ADDRESS]) |
5c753978 | 866 | tb[IFA_ADDRESS] = tb[IFA_LOCAL]; |
1da177e4 | 867 | |
fd23c3b3 | 868 | INIT_HLIST_NODE(&ifa->hash); |
1da177e4 LT |
869 | ifa->ifa_prefixlen = ifm->ifa_prefixlen; |
870 | ifa->ifa_mask = inet_make_mask(ifm->ifa_prefixlen); | |
ad6c8135 JP |
871 | ifa->ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : |
872 | ifm->ifa_flags; | |
1da177e4 | 873 | ifa->ifa_scope = ifm->ifa_scope; |
5c753978 TG |
874 | ifa->ifa_dev = in_dev; |
875 | ||
67b61f6c JB |
876 | ifa->ifa_local = nla_get_in_addr(tb[IFA_LOCAL]); |
877 | ifa->ifa_address = nla_get_in_addr(tb[IFA_ADDRESS]); | |
5c753978 TG |
878 | |
879 | if (tb[IFA_BROADCAST]) | |
67b61f6c | 880 | ifa->ifa_broadcast = nla_get_in_addr(tb[IFA_BROADCAST]); |
5c753978 | 881 | |
5c753978 | 882 | if (tb[IFA_LABEL]) |
872f6903 | 883 | nla_strscpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ); |
1da177e4 LT |
884 | else |
885 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
886 | ||
af4d768a DA |
887 | if (tb[IFA_RT_PRIORITY]) |
888 | ifa->ifa_rt_priority = nla_get_u32(tb[IFA_RT_PRIORITY]); | |
889 | ||
5c766d64 JP |
890 | if (tb[IFA_CACHEINFO]) { |
891 | struct ifa_cacheinfo *ci; | |
892 | ||
893 | ci = nla_data(tb[IFA_CACHEINFO]); | |
894 | if (!ci->ifa_valid || ci->ifa_prefered > ci->ifa_valid) { | |
895 | err = -EINVAL; | |
446266b0 | 896 | goto errout_free; |
5c766d64 JP |
897 | } |
898 | *pvalid_lft = ci->ifa_valid; | |
899 | *pprefered_lft = ci->ifa_prefered; | |
900 | } | |
901 | ||
5c753978 TG |
902 | return ifa; |
903 | ||
446266b0 DB |
904 | errout_free: |
905 | inet_free_ifa(ifa); | |
5c753978 TG |
906 | errout: |
907 | return ERR_PTR(err); | |
908 | } | |
909 | ||
5c766d64 JP |
910 | static struct in_ifaddr *find_matching_ifa(struct in_ifaddr *ifa) |
911 | { | |
912 | struct in_device *in_dev = ifa->ifa_dev; | |
ef11db33 | 913 | struct in_ifaddr *ifa1; |
5c766d64 JP |
914 | |
915 | if (!ifa->ifa_local) | |
916 | return NULL; | |
917 | ||
ef11db33 | 918 | in_dev_for_each_ifa_rtnl(ifa1, in_dev) { |
5c766d64 JP |
919 | if (ifa1->ifa_mask == ifa->ifa_mask && |
920 | inet_ifa_match(ifa1->ifa_address, ifa) && | |
921 | ifa1->ifa_local == ifa->ifa_local) | |
922 | return ifa1; | |
923 | } | |
924 | return NULL; | |
925 | } | |
926 | ||
c21ef3e3 DA |
927 | static int inet_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, |
928 | struct netlink_ext_ack *extack) | |
5c753978 | 929 | { |
3b1e0a65 | 930 | struct net *net = sock_net(skb->sk); |
5c753978 | 931 | struct in_ifaddr *ifa; |
5c766d64 JP |
932 | struct in_ifaddr *ifa_existing; |
933 | __u32 valid_lft = INFINITY_LIFE_TIME; | |
934 | __u32 prefered_lft = INFINITY_LIFE_TIME; | |
5c753978 TG |
935 | |
936 | ASSERT_RTNL(); | |
937 | ||
dac9c979 | 938 | ifa = rtm_to_ifaddr(net, nlh, &valid_lft, &prefered_lft, extack); |
5c753978 TG |
939 | if (IS_ERR(ifa)) |
940 | return PTR_ERR(ifa); | |
941 | ||
5c766d64 JP |
942 | ifa_existing = find_matching_ifa(ifa); |
943 | if (!ifa_existing) { | |
944 | /* It would be best to check for !NLM_F_CREATE here but | |
614d056c | 945 | * userspace already relies on not having to provide this. |
5c766d64 JP |
946 | */ |
947 | set_ifa_lifetime(ifa, valid_lft, prefered_lft); | |
93a714d6 | 948 | if (ifa->ifa_flags & IFA_F_MCAUTOJOIN) { |
690cc863 | 949 | int ret = ip_mc_autojoin_config(net, true, ifa); |
93a714d6 MC |
950 | |
951 | if (ret < 0) { | |
952 | inet_free_ifa(ifa); | |
953 | return ret; | |
954 | } | |
955 | } | |
de95e047 DA |
956 | return __inet_insert_ifa(ifa, nlh, NETLINK_CB(skb).portid, |
957 | extack); | |
5c766d64 | 958 | } else { |
af4d768a DA |
959 | u32 new_metric = ifa->ifa_rt_priority; |
960 | ||
5c766d64 JP |
961 | inet_free_ifa(ifa); |
962 | ||
963 | if (nlh->nlmsg_flags & NLM_F_EXCL || | |
964 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
965 | return -EEXIST; | |
34e2ed34 | 966 | ifa = ifa_existing; |
af4d768a DA |
967 | |
968 | if (ifa->ifa_rt_priority != new_metric) { | |
969 | fib_modify_prefix_metric(ifa, new_metric); | |
970 | ifa->ifa_rt_priority = new_metric; | |
971 | } | |
972 | ||
34e2ed34 | 973 | set_ifa_lifetime(ifa, valid_lft, prefered_lft); |
05a324b9 | 974 | cancel_delayed_work(&check_lifetime_work); |
906e073f | 975 | queue_delayed_work(system_power_efficient_wq, |
976 | &check_lifetime_work, 0); | |
34e2ed34 | 977 | rtmsg_ifa(RTM_NEWADDR, ifa, nlh, NETLINK_CB(skb).portid); |
5c766d64 JP |
978 | } |
979 | return 0; | |
1da177e4 LT |
980 | } |
981 | ||
982 | /* | |
983 | * Determine a default network mask, based on the IP address. | |
984 | */ | |
985 | ||
40384999 | 986 | static int inet_abc_len(__be32 addr) |
1da177e4 LT |
987 | { |
988 | int rc = -1; /* Something else, probably a multicast. */ | |
989 | ||
65cab850 | 990 | if (ipv4_is_zeronet(addr) || ipv4_is_lbcast(addr)) |
e905a9ed | 991 | rc = 0; |
1da177e4 | 992 | else { |
714e85be | 993 | __u32 haddr = ntohl(addr); |
714e85be | 994 | if (IN_CLASSA(haddr)) |
1da177e4 | 995 | rc = 8; |
714e85be | 996 | else if (IN_CLASSB(haddr)) |
1da177e4 | 997 | rc = 16; |
714e85be | 998 | else if (IN_CLASSC(haddr)) |
1da177e4 | 999 | rc = 24; |
65cab850 DT |
1000 | else if (IN_CLASSE(haddr)) |
1001 | rc = 32; | |
1da177e4 LT |
1002 | } |
1003 | ||
e905a9ed | 1004 | return rc; |
1da177e4 LT |
1005 | } |
1006 | ||
1007 | ||
03aef17b | 1008 | int devinet_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr) |
1da177e4 | 1009 | { |
1da177e4 | 1010 | struct sockaddr_in sin_orig; |
03aef17b | 1011 | struct sockaddr_in *sin = (struct sockaddr_in *)&ifr->ifr_addr; |
2638eb8b | 1012 | struct in_ifaddr __rcu **ifap = NULL; |
1da177e4 | 1013 | struct in_device *in_dev; |
1da177e4 LT |
1014 | struct in_ifaddr *ifa = NULL; |
1015 | struct net_device *dev; | |
1016 | char *colon; | |
1017 | int ret = -EFAULT; | |
1018 | int tryaddrmatch = 0; | |
1019 | ||
03aef17b | 1020 | ifr->ifr_name[IFNAMSIZ - 1] = 0; |
1da177e4 LT |
1021 | |
1022 | /* save original address for comparison */ | |
1023 | memcpy(&sin_orig, sin, sizeof(*sin)); | |
1024 | ||
03aef17b | 1025 | colon = strchr(ifr->ifr_name, ':'); |
1da177e4 LT |
1026 | if (colon) |
1027 | *colon = 0; | |
1028 | ||
03aef17b | 1029 | dev_load(net, ifr->ifr_name); |
1da177e4 | 1030 | |
132adf54 | 1031 | switch (cmd) { |
1da177e4 LT |
1032 | case SIOCGIFADDR: /* Get interface address */ |
1033 | case SIOCGIFBRDADDR: /* Get the broadcast address */ | |
1034 | case SIOCGIFDSTADDR: /* Get the destination address */ | |
1035 | case SIOCGIFNETMASK: /* Get the netmask for the interface */ | |
1036 | /* Note that these ioctls will not sleep, | |
1037 | so that we do not impose a lock. | |
1038 | One day we will be forced to put shlock here (I mean SMP) | |
1039 | */ | |
1040 | tryaddrmatch = (sin_orig.sin_family == AF_INET); | |
1041 | memset(sin, 0, sizeof(*sin)); | |
1042 | sin->sin_family = AF_INET; | |
1043 | break; | |
1044 | ||
1045 | case SIOCSIFFLAGS: | |
bf5b30b8 | 1046 | ret = -EPERM; |
52e804c6 | 1047 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
1048 | goto out; |
1049 | break; | |
1050 | case SIOCSIFADDR: /* Set interface address (and family) */ | |
1051 | case SIOCSIFBRDADDR: /* Set the broadcast address */ | |
1052 | case SIOCSIFDSTADDR: /* Set the destination address */ | |
1053 | case SIOCSIFNETMASK: /* Set the netmask for the interface */ | |
bf5b30b8 | 1054 | ret = -EPERM; |
52e804c6 | 1055 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
1056 | goto out; |
1057 | ret = -EINVAL; | |
1058 | if (sin->sin_family != AF_INET) | |
1059 | goto out; | |
1060 | break; | |
1061 | default: | |
1062 | ret = -EINVAL; | |
1063 | goto out; | |
1064 | } | |
1065 | ||
1066 | rtnl_lock(); | |
1067 | ||
1068 | ret = -ENODEV; | |
03aef17b | 1069 | dev = __dev_get_by_name(net, ifr->ifr_name); |
9f9354b9 | 1070 | if (!dev) |
1da177e4 LT |
1071 | goto done; |
1072 | ||
1073 | if (colon) | |
1074 | *colon = ':'; | |
1075 | ||
9f9354b9 ED |
1076 | in_dev = __in_dev_get_rtnl(dev); |
1077 | if (in_dev) { | |
1da177e4 LT |
1078 | if (tryaddrmatch) { |
1079 | /* Matthias Andree */ | |
1080 | /* compare label and address (4.4BSD style) */ | |
1081 | /* note: we only do this for a limited set of ioctls | |
1082 | and only if the original address family was AF_INET. | |
1083 | This is checked above. */ | |
2638eb8b FW |
1084 | |
1085 | for (ifap = &in_dev->ifa_list; | |
1086 | (ifa = rtnl_dereference(*ifap)) != NULL; | |
1da177e4 | 1087 | ifap = &ifa->ifa_next) { |
03aef17b | 1088 | if (!strcmp(ifr->ifr_name, ifa->ifa_label) && |
1da177e4 | 1089 | sin_orig.sin_addr.s_addr == |
6c91afe1 | 1090 | ifa->ifa_local) { |
1da177e4 LT |
1091 | break; /* found */ |
1092 | } | |
1093 | } | |
1094 | } | |
1095 | /* we didn't get a match, maybe the application is | |
1096 | 4.3BSD-style and passed in junk so we fall back to | |
1097 | comparing just the label */ | |
1098 | if (!ifa) { | |
2638eb8b FW |
1099 | for (ifap = &in_dev->ifa_list; |
1100 | (ifa = rtnl_dereference(*ifap)) != NULL; | |
1da177e4 | 1101 | ifap = &ifa->ifa_next) |
03aef17b | 1102 | if (!strcmp(ifr->ifr_name, ifa->ifa_label)) |
1da177e4 LT |
1103 | break; |
1104 | } | |
1105 | } | |
1106 | ||
1107 | ret = -EADDRNOTAVAIL; | |
1108 | if (!ifa && cmd != SIOCSIFADDR && cmd != SIOCSIFFLAGS) | |
1109 | goto done; | |
1110 | ||
132adf54 | 1111 | switch (cmd) { |
1da177e4 | 1112 | case SIOCGIFADDR: /* Get interface address */ |
30e948a3 | 1113 | ret = 0; |
1da177e4 | 1114 | sin->sin_addr.s_addr = ifa->ifa_local; |
03aef17b | 1115 | break; |
1da177e4 LT |
1116 | |
1117 | case SIOCGIFBRDADDR: /* Get the broadcast address */ | |
30e948a3 | 1118 | ret = 0; |
1da177e4 | 1119 | sin->sin_addr.s_addr = ifa->ifa_broadcast; |
03aef17b | 1120 | break; |
1da177e4 LT |
1121 | |
1122 | case SIOCGIFDSTADDR: /* Get the destination address */ | |
30e948a3 | 1123 | ret = 0; |
1da177e4 | 1124 | sin->sin_addr.s_addr = ifa->ifa_address; |
03aef17b | 1125 | break; |
1da177e4 LT |
1126 | |
1127 | case SIOCGIFNETMASK: /* Get the netmask for the interface */ | |
30e948a3 | 1128 | ret = 0; |
1da177e4 | 1129 | sin->sin_addr.s_addr = ifa->ifa_mask; |
03aef17b | 1130 | break; |
1da177e4 LT |
1131 | |
1132 | case SIOCSIFFLAGS: | |
1133 | if (colon) { | |
1134 | ret = -EADDRNOTAVAIL; | |
1135 | if (!ifa) | |
1136 | break; | |
1137 | ret = 0; | |
03aef17b | 1138 | if (!(ifr->ifr_flags & IFF_UP)) |
1da177e4 LT |
1139 | inet_del_ifa(in_dev, ifap, 1); |
1140 | break; | |
1141 | } | |
567c5e13 | 1142 | ret = dev_change_flags(dev, ifr->ifr_flags, NULL); |
1da177e4 LT |
1143 | break; |
1144 | ||
1145 | case SIOCSIFADDR: /* Set interface address (and family) */ | |
1146 | ret = -EINVAL; | |
1147 | if (inet_abc_len(sin->sin_addr.s_addr) < 0) | |
1148 | break; | |
1149 | ||
1150 | if (!ifa) { | |
1151 | ret = -ENOBUFS; | |
9f9354b9 ED |
1152 | ifa = inet_alloc_ifa(); |
1153 | if (!ifa) | |
1da177e4 | 1154 | break; |
c7e2e1d7 | 1155 | INIT_HLIST_NODE(&ifa->hash); |
1da177e4 | 1156 | if (colon) |
03aef17b | 1157 | memcpy(ifa->ifa_label, ifr->ifr_name, IFNAMSIZ); |
1da177e4 LT |
1158 | else |
1159 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
1160 | } else { | |
1161 | ret = 0; | |
1162 | if (ifa->ifa_local == sin->sin_addr.s_addr) | |
1163 | break; | |
1164 | inet_del_ifa(in_dev, ifap, 0); | |
1165 | ifa->ifa_broadcast = 0; | |
148f9729 | 1166 | ifa->ifa_scope = 0; |
1da177e4 LT |
1167 | } |
1168 | ||
1169 | ifa->ifa_address = ifa->ifa_local = sin->sin_addr.s_addr; | |
1170 | ||
1171 | if (!(dev->flags & IFF_POINTOPOINT)) { | |
1172 | ifa->ifa_prefixlen = inet_abc_len(ifa->ifa_address); | |
1173 | ifa->ifa_mask = inet_make_mask(ifa->ifa_prefixlen); | |
1174 | if ((dev->flags & IFF_BROADCAST) && | |
1175 | ifa->ifa_prefixlen < 31) | |
1176 | ifa->ifa_broadcast = ifa->ifa_address | | |
1177 | ~ifa->ifa_mask; | |
1178 | } else { | |
1179 | ifa->ifa_prefixlen = 32; | |
1180 | ifa->ifa_mask = inet_make_mask(32); | |
1181 | } | |
5c766d64 | 1182 | set_ifa_lifetime(ifa, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); |
1da177e4 LT |
1183 | ret = inet_set_ifa(dev, ifa); |
1184 | break; | |
1185 | ||
1186 | case SIOCSIFBRDADDR: /* Set the broadcast address */ | |
1187 | ret = 0; | |
1188 | if (ifa->ifa_broadcast != sin->sin_addr.s_addr) { | |
1189 | inet_del_ifa(in_dev, ifap, 0); | |
1190 | ifa->ifa_broadcast = sin->sin_addr.s_addr; | |
1191 | inet_insert_ifa(ifa); | |
1192 | } | |
1193 | break; | |
1194 | ||
1195 | case SIOCSIFDSTADDR: /* Set the destination address */ | |
1196 | ret = 0; | |
1197 | if (ifa->ifa_address == sin->sin_addr.s_addr) | |
1198 | break; | |
1199 | ret = -EINVAL; | |
1200 | if (inet_abc_len(sin->sin_addr.s_addr) < 0) | |
1201 | break; | |
1202 | ret = 0; | |
1203 | inet_del_ifa(in_dev, ifap, 0); | |
1204 | ifa->ifa_address = sin->sin_addr.s_addr; | |
1205 | inet_insert_ifa(ifa); | |
1206 | break; | |
1207 | ||
1208 | case SIOCSIFNETMASK: /* Set the netmask for the interface */ | |
1209 | ||
1210 | /* | |
1211 | * The mask we set must be legal. | |
1212 | */ | |
1213 | ret = -EINVAL; | |
1214 | if (bad_mask(sin->sin_addr.s_addr, 0)) | |
1215 | break; | |
1216 | ret = 0; | |
1217 | if (ifa->ifa_mask != sin->sin_addr.s_addr) { | |
a144ea4b | 1218 | __be32 old_mask = ifa->ifa_mask; |
1da177e4 LT |
1219 | inet_del_ifa(in_dev, ifap, 0); |
1220 | ifa->ifa_mask = sin->sin_addr.s_addr; | |
1221 | ifa->ifa_prefixlen = inet_mask_len(ifa->ifa_mask); | |
1222 | ||
1223 | /* See if current broadcast address matches | |
1224 | * with current netmask, then recalculate | |
1225 | * the broadcast address. Otherwise it's a | |
1226 | * funny address, so don't touch it since | |
1227 | * the user seems to know what (s)he's doing... | |
1228 | */ | |
1229 | if ((dev->flags & IFF_BROADCAST) && | |
1230 | (ifa->ifa_prefixlen < 31) && | |
1231 | (ifa->ifa_broadcast == | |
dcab5e1e | 1232 | (ifa->ifa_local|~old_mask))) { |
1da177e4 LT |
1233 | ifa->ifa_broadcast = (ifa->ifa_local | |
1234 | ~sin->sin_addr.s_addr); | |
1235 | } | |
1236 | inet_insert_ifa(ifa); | |
1237 | } | |
1238 | break; | |
1239 | } | |
1240 | done: | |
1241 | rtnl_unlock(); | |
1242 | out: | |
1243 | return ret; | |
1da177e4 LT |
1244 | } |
1245 | ||
36fd633e | 1246 | static int inet_gifconf(struct net_device *dev, char __user *buf, int len, int size) |
1da177e4 | 1247 | { |
e5ed6399 | 1248 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
ef11db33 | 1249 | const struct in_ifaddr *ifa; |
1da177e4 LT |
1250 | struct ifreq ifr; |
1251 | int done = 0; | |
1252 | ||
36fd633e AV |
1253 | if (WARN_ON(size > sizeof(struct ifreq))) |
1254 | goto out; | |
1255 | ||
9f9354b9 | 1256 | if (!in_dev) |
1da177e4 LT |
1257 | goto out; |
1258 | ||
ef11db33 | 1259 | in_dev_for_each_ifa_rtnl(ifa, in_dev) { |
1da177e4 | 1260 | if (!buf) { |
36fd633e | 1261 | done += size; |
1da177e4 LT |
1262 | continue; |
1263 | } | |
36fd633e | 1264 | if (len < size) |
1da177e4 LT |
1265 | break; |
1266 | memset(&ifr, 0, sizeof(struct ifreq)); | |
4299c8a9 | 1267 | strcpy(ifr.ifr_name, ifa->ifa_label); |
1da177e4 LT |
1268 | |
1269 | (*(struct sockaddr_in *)&ifr.ifr_addr).sin_family = AF_INET; | |
1270 | (*(struct sockaddr_in *)&ifr.ifr_addr).sin_addr.s_addr = | |
1271 | ifa->ifa_local; | |
1272 | ||
36fd633e | 1273 | if (copy_to_user(buf + done, &ifr, size)) { |
1da177e4 LT |
1274 | done = -EFAULT; |
1275 | break; | |
1276 | } | |
36fd633e AV |
1277 | len -= size; |
1278 | done += size; | |
1da177e4 LT |
1279 | } |
1280 | out: | |
1281 | return done; | |
1282 | } | |
1283 | ||
8b57fd1e GF |
1284 | static __be32 in_dev_select_addr(const struct in_device *in_dev, |
1285 | int scope) | |
1286 | { | |
d519e870 FW |
1287 | const struct in_ifaddr *ifa; |
1288 | ||
1289 | in_dev_for_each_ifa_rcu(ifa, in_dev) { | |
1290 | if (ifa->ifa_flags & IFA_F_SECONDARY) | |
1291 | continue; | |
8b57fd1e GF |
1292 | if (ifa->ifa_scope != RT_SCOPE_LINK && |
1293 | ifa->ifa_scope <= scope) | |
1294 | return ifa->ifa_local; | |
d519e870 | 1295 | } |
8b57fd1e GF |
1296 | |
1297 | return 0; | |
1298 | } | |
1299 | ||
a61ced5d | 1300 | __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope) |
1da177e4 | 1301 | { |
d519e870 | 1302 | const struct in_ifaddr *ifa; |
a61ced5d | 1303 | __be32 addr = 0; |
d8c444d5 | 1304 | unsigned char localnet_scope = RT_SCOPE_HOST; |
1da177e4 | 1305 | struct in_device *in_dev; |
c346dca1 | 1306 | struct net *net = dev_net(dev); |
3f2fb9a8 | 1307 | int master_idx; |
1da177e4 LT |
1308 | |
1309 | rcu_read_lock(); | |
e5ed6399 | 1310 | in_dev = __in_dev_get_rcu(dev); |
1da177e4 LT |
1311 | if (!in_dev) |
1312 | goto no_in_dev; | |
1313 | ||
d8c444d5 SL |
1314 | if (unlikely(IN_DEV_ROUTE_LOCALNET(in_dev))) |
1315 | localnet_scope = RT_SCOPE_LINK; | |
1316 | ||
d519e870 FW |
1317 | in_dev_for_each_ifa_rcu(ifa, in_dev) { |
1318 | if (ifa->ifa_flags & IFA_F_SECONDARY) | |
1319 | continue; | |
d8c444d5 | 1320 | if (min(ifa->ifa_scope, localnet_scope) > scope) |
1da177e4 LT |
1321 | continue; |
1322 | if (!dst || inet_ifa_match(dst, ifa)) { | |
1323 | addr = ifa->ifa_local; | |
1324 | break; | |
1325 | } | |
1326 | if (!addr) | |
1327 | addr = ifa->ifa_local; | |
d519e870 | 1328 | } |
1da177e4 LT |
1329 | |
1330 | if (addr) | |
c6d14c84 | 1331 | goto out_unlock; |
9f9354b9 | 1332 | no_in_dev: |
3f2fb9a8 | 1333 | master_idx = l3mdev_master_ifindex_rcu(dev); |
1da177e4 | 1334 | |
17b693cd DL |
1335 | /* For VRFs, the VRF device takes the place of the loopback device, |
1336 | * with addresses on it being preferred. Note in such cases the | |
1337 | * loopback device will be among the devices that fail the master_idx | |
1338 | * equality check in the loop below. | |
1339 | */ | |
1340 | if (master_idx && | |
1341 | (dev = dev_get_by_index_rcu(net, master_idx)) && | |
1342 | (in_dev = __in_dev_get_rcu(dev))) { | |
8b57fd1e GF |
1343 | addr = in_dev_select_addr(in_dev, scope); |
1344 | if (addr) | |
1345 | goto out_unlock; | |
17b693cd DL |
1346 | } |
1347 | ||
1da177e4 | 1348 | /* Not loopback addresses on loopback should be preferred |
ca9f1fd2 | 1349 | in this case. It is important that lo is the first interface |
1da177e4 LT |
1350 | in dev_base list. |
1351 | */ | |
c6d14c84 | 1352 | for_each_netdev_rcu(net, dev) { |
3f2fb9a8 DA |
1353 | if (l3mdev_master_ifindex_rcu(dev) != master_idx) |
1354 | continue; | |
1355 | ||
9f9354b9 ED |
1356 | in_dev = __in_dev_get_rcu(dev); |
1357 | if (!in_dev) | |
1da177e4 LT |
1358 | continue; |
1359 | ||
8b57fd1e GF |
1360 | addr = in_dev_select_addr(in_dev, scope); |
1361 | if (addr) | |
1362 | goto out_unlock; | |
1da177e4 | 1363 | } |
c6d14c84 | 1364 | out_unlock: |
1da177e4 | 1365 | rcu_read_unlock(); |
1da177e4 LT |
1366 | return addr; |
1367 | } | |
9f9354b9 | 1368 | EXPORT_SYMBOL(inet_select_addr); |
1da177e4 | 1369 | |
60cad5da AV |
1370 | static __be32 confirm_addr_indev(struct in_device *in_dev, __be32 dst, |
1371 | __be32 local, int scope) | |
1da177e4 | 1372 | { |
650638a7 | 1373 | unsigned char localnet_scope = RT_SCOPE_HOST; |
ef11db33 | 1374 | const struct in_ifaddr *ifa; |
a144ea4b | 1375 | __be32 addr = 0; |
ef11db33 | 1376 | int same = 0; |
1da177e4 | 1377 | |
650638a7 SL |
1378 | if (unlikely(IN_DEV_ROUTE_LOCALNET(in_dev))) |
1379 | localnet_scope = RT_SCOPE_LINK; | |
1380 | ||
ef11db33 | 1381 | in_dev_for_each_ifa_rcu(ifa, in_dev) { |
650638a7 SL |
1382 | unsigned char min_scope = min(ifa->ifa_scope, localnet_scope); |
1383 | ||
1da177e4 LT |
1384 | if (!addr && |
1385 | (local == ifa->ifa_local || !local) && | |
650638a7 | 1386 | min_scope <= scope) { |
1da177e4 LT |
1387 | addr = ifa->ifa_local; |
1388 | if (same) | |
1389 | break; | |
1390 | } | |
1391 | if (!same) { | |
1392 | same = (!local || inet_ifa_match(local, ifa)) && | |
1393 | (!dst || inet_ifa_match(dst, ifa)); | |
1394 | if (same && addr) { | |
1395 | if (local || !dst) | |
1396 | break; | |
1397 | /* Is the selected addr into dst subnet? */ | |
1398 | if (inet_ifa_match(addr, ifa)) | |
1399 | break; | |
1400 | /* No, then can we use new local src? */ | |
650638a7 | 1401 | if (min_scope <= scope) { |
1da177e4 LT |
1402 | addr = ifa->ifa_local; |
1403 | break; | |
1404 | } | |
1405 | /* search for large dst subnet for addr */ | |
1406 | same = 0; | |
1407 | } | |
1408 | } | |
ef11db33 | 1409 | } |
1da177e4 | 1410 | |
9f9354b9 | 1411 | return same ? addr : 0; |
1da177e4 LT |
1412 | } |
1413 | ||
1414 | /* | |
1415 | * Confirm that local IP address exists using wildcards: | |
b601fa19 ND |
1416 | * - net: netns to check, cannot be NULL |
1417 | * - in_dev: only on this interface, NULL=any interface | |
1da177e4 LT |
1418 | * - dst: only in the same subnet as dst, 0=any dst |
1419 | * - local: address, 0=autoselect the local address | |
1420 | * - scope: maximum allowed scope value for the local address | |
1421 | */ | |
b601fa19 | 1422 | __be32 inet_confirm_addr(struct net *net, struct in_device *in_dev, |
9bd85e32 | 1423 | __be32 dst, __be32 local, int scope) |
1da177e4 | 1424 | { |
60cad5da | 1425 | __be32 addr = 0; |
9bd85e32 | 1426 | struct net_device *dev; |
1da177e4 | 1427 | |
00db4124 | 1428 | if (in_dev) |
9bd85e32 | 1429 | return confirm_addr_indev(in_dev, dst, local, scope); |
1da177e4 | 1430 | |
1da177e4 | 1431 | rcu_read_lock(); |
c6d14c84 | 1432 | for_each_netdev_rcu(net, dev) { |
9f9354b9 ED |
1433 | in_dev = __in_dev_get_rcu(dev); |
1434 | if (in_dev) { | |
1da177e4 LT |
1435 | addr = confirm_addr_indev(in_dev, dst, local, scope); |
1436 | if (addr) | |
1437 | break; | |
1438 | } | |
1439 | } | |
1440 | rcu_read_unlock(); | |
1da177e4 LT |
1441 | |
1442 | return addr; | |
1443 | } | |
eaddcd76 | 1444 | EXPORT_SYMBOL(inet_confirm_addr); |
1da177e4 LT |
1445 | |
1446 | /* | |
1447 | * Device notifier | |
1448 | */ | |
1449 | ||
1450 | int register_inetaddr_notifier(struct notifier_block *nb) | |
1451 | { | |
e041c683 | 1452 | return blocking_notifier_chain_register(&inetaddr_chain, nb); |
1da177e4 | 1453 | } |
9f9354b9 | 1454 | EXPORT_SYMBOL(register_inetaddr_notifier); |
1da177e4 LT |
1455 | |
1456 | int unregister_inetaddr_notifier(struct notifier_block *nb) | |
1457 | { | |
e041c683 | 1458 | return blocking_notifier_chain_unregister(&inetaddr_chain, nb); |
1da177e4 | 1459 | } |
9f9354b9 | 1460 | EXPORT_SYMBOL(unregister_inetaddr_notifier); |
1da177e4 | 1461 | |
3ad7d246 KJ |
1462 | int register_inetaddr_validator_notifier(struct notifier_block *nb) |
1463 | { | |
1464 | return blocking_notifier_chain_register(&inetaddr_validator_chain, nb); | |
1465 | } | |
1466 | EXPORT_SYMBOL(register_inetaddr_validator_notifier); | |
1467 | ||
1468 | int unregister_inetaddr_validator_notifier(struct notifier_block *nb) | |
1469 | { | |
1470 | return blocking_notifier_chain_unregister(&inetaddr_validator_chain, | |
1471 | nb); | |
1472 | } | |
1473 | EXPORT_SYMBOL(unregister_inetaddr_validator_notifier); | |
1474 | ||
9f9354b9 ED |
1475 | /* Rename ifa_labels for a device name change. Make some effort to preserve |
1476 | * existing alias numbering and to create unique labels if possible. | |
1da177e4 LT |
1477 | */ |
1478 | static void inetdev_changename(struct net_device *dev, struct in_device *in_dev) | |
e905a9ed | 1479 | { |
1da177e4 LT |
1480 | struct in_ifaddr *ifa; |
1481 | int named = 0; | |
1482 | ||
ef11db33 | 1483 | in_dev_for_each_ifa_rtnl(ifa, in_dev) { |
e905a9ed | 1484 | char old[IFNAMSIZ], *dot; |
1da177e4 LT |
1485 | |
1486 | memcpy(old, ifa->ifa_label, IFNAMSIZ); | |
e905a9ed | 1487 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
1da177e4 | 1488 | if (named++ == 0) |
573bf470 | 1489 | goto skip; |
44344b2a | 1490 | dot = strchr(old, ':'); |
51456b29 | 1491 | if (!dot) { |
e905a9ed | 1492 | sprintf(old, ":%d", named); |
1da177e4 LT |
1493 | dot = old; |
1494 | } | |
9f9354b9 | 1495 | if (strlen(dot) + strlen(dev->name) < IFNAMSIZ) |
e905a9ed | 1496 | strcat(ifa->ifa_label, dot); |
9f9354b9 | 1497 | else |
e905a9ed | 1498 | strcpy(ifa->ifa_label + (IFNAMSIZ - strlen(dot) - 1), dot); |
573bf470 TG |
1499 | skip: |
1500 | rtmsg_ifa(RTM_NEWADDR, ifa, NULL, 0); | |
e905a9ed YH |
1501 | } |
1502 | } | |
1da177e4 | 1503 | |
d11327ad IC |
1504 | static void inetdev_send_gratuitous_arp(struct net_device *dev, |
1505 | struct in_device *in_dev) | |
1506 | ||
1507 | { | |
ef11db33 | 1508 | const struct in_ifaddr *ifa; |
d11327ad | 1509 | |
ef11db33 | 1510 | in_dev_for_each_ifa_rtnl(ifa, in_dev) { |
b76d0789 ZK |
1511 | arp_send(ARPOP_REQUEST, ETH_P_ARP, |
1512 | ifa->ifa_local, dev, | |
1513 | ifa->ifa_local, NULL, | |
1514 | dev->dev_addr, NULL); | |
1515 | } | |
d11327ad IC |
1516 | } |
1517 | ||
1da177e4 LT |
1518 | /* Called only under RTNL semaphore */ |
1519 | ||
1520 | static int inetdev_event(struct notifier_block *this, unsigned long event, | |
1521 | void *ptr) | |
1522 | { | |
351638e7 | 1523 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
748e2d93 | 1524 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
0115e8e3 | 1525 | |
1da177e4 LT |
1526 | ASSERT_RTNL(); |
1527 | ||
1528 | if (!in_dev) { | |
8030f544 | 1529 | if (event == NETDEV_REGISTER) { |
1da177e4 | 1530 | in_dev = inetdev_init(dev); |
20e61da7 WC |
1531 | if (IS_ERR(in_dev)) |
1532 | return notifier_from_errno(PTR_ERR(in_dev)); | |
0cc217e1 | 1533 | if (dev->flags & IFF_LOOPBACK) { |
42f811b8 HX |
1534 | IN_DEV_CONF_SET(in_dev, NOXFRM, 1); |
1535 | IN_DEV_CONF_SET(in_dev, NOPOLICY, 1); | |
8030f544 | 1536 | } |
06770843 BL |
1537 | } else if (event == NETDEV_CHANGEMTU) { |
1538 | /* Re-enabling IP */ | |
1539 | if (inetdev_valid_mtu(dev->mtu)) | |
1540 | in_dev = inetdev_init(dev); | |
1da177e4 LT |
1541 | } |
1542 | goto out; | |
1543 | } | |
1544 | ||
1545 | switch (event) { | |
1546 | case NETDEV_REGISTER: | |
91df42be | 1547 | pr_debug("%s: bug\n", __func__); |
a9b3cd7f | 1548 | RCU_INIT_POINTER(dev->ip_ptr, NULL); |
1da177e4 LT |
1549 | break; |
1550 | case NETDEV_UP: | |
06770843 | 1551 | if (!inetdev_valid_mtu(dev->mtu)) |
1da177e4 | 1552 | break; |
0cc217e1 | 1553 | if (dev->flags & IFF_LOOPBACK) { |
9f9354b9 ED |
1554 | struct in_ifaddr *ifa = inet_alloc_ifa(); |
1555 | ||
1556 | if (ifa) { | |
fd23c3b3 | 1557 | INIT_HLIST_NODE(&ifa->hash); |
1da177e4 LT |
1558 | ifa->ifa_local = |
1559 | ifa->ifa_address = htonl(INADDR_LOOPBACK); | |
1560 | ifa->ifa_prefixlen = 8; | |
1561 | ifa->ifa_mask = inet_make_mask(8); | |
1562 | in_dev_hold(in_dev); | |
1563 | ifa->ifa_dev = in_dev; | |
1564 | ifa->ifa_scope = RT_SCOPE_HOST; | |
1565 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
5c766d64 JP |
1566 | set_ifa_lifetime(ifa, INFINITY_LIFE_TIME, |
1567 | INFINITY_LIFE_TIME); | |
dfd1582d JP |
1568 | ipv4_devconf_setall(in_dev); |
1569 | neigh_parms_data_state_setall(in_dev->arp_parms); | |
1da177e4 LT |
1570 | inet_insert_ifa(ifa); |
1571 | } | |
1572 | } | |
1573 | ip_mc_up(in_dev); | |
a8eceea8 | 1574 | fallthrough; |
eefef1cf | 1575 | case NETDEV_CHANGEADDR: |
d11327ad IC |
1576 | if (!IN_DEV_ARP_NOTIFY(in_dev)) |
1577 | break; | |
a8eceea8 | 1578 | fallthrough; |
d11327ad | 1579 | case NETDEV_NOTIFY_PEERS: |
a21090cf | 1580 | /* Send gratuitous ARP to notify of link change */ |
d11327ad | 1581 | inetdev_send_gratuitous_arp(dev, in_dev); |
1da177e4 LT |
1582 | break; |
1583 | case NETDEV_DOWN: | |
1584 | ip_mc_down(in_dev); | |
1585 | break; | |
93d9b7d7 | 1586 | case NETDEV_PRE_TYPE_CHANGE: |
75c78500 MS |
1587 | ip_mc_unmap(in_dev); |
1588 | break; | |
93d9b7d7 | 1589 | case NETDEV_POST_TYPE_CHANGE: |
75c78500 MS |
1590 | ip_mc_remap(in_dev); |
1591 | break; | |
1da177e4 | 1592 | case NETDEV_CHANGEMTU: |
06770843 | 1593 | if (inetdev_valid_mtu(dev->mtu)) |
1da177e4 | 1594 | break; |
06770843 | 1595 | /* disable IP when MTU is not enough */ |
a8eceea8 | 1596 | fallthrough; |
1da177e4 LT |
1597 | case NETDEV_UNREGISTER: |
1598 | inetdev_destroy(in_dev); | |
1599 | break; | |
1600 | case NETDEV_CHANGENAME: | |
1601 | /* Do not notify about label change, this event is | |
1602 | * not interesting to applications using netlink. | |
1603 | */ | |
1604 | inetdev_changename(dev, in_dev); | |
1605 | ||
51602b2a | 1606 | devinet_sysctl_unregister(in_dev); |
66f27a52 | 1607 | devinet_sysctl_register(in_dev); |
1da177e4 LT |
1608 | break; |
1609 | } | |
1610 | out: | |
1611 | return NOTIFY_DONE; | |
1612 | } | |
1613 | ||
1614 | static struct notifier_block ip_netdev_notifier = { | |
539afedf | 1615 | .notifier_call = inetdev_event, |
1da177e4 LT |
1616 | }; |
1617 | ||
40384999 | 1618 | static size_t inet_nlmsg_size(void) |
339bf98f TG |
1619 | { |
1620 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) | |
1621 | + nla_total_size(4) /* IFA_ADDRESS */ | |
1622 | + nla_total_size(4) /* IFA_LOCAL */ | |
1623 | + nla_total_size(4) /* IFA_BROADCAST */ | |
ad6c8135 | 1624 | + nla_total_size(IFNAMSIZ) /* IFA_LABEL */ |
63b5f152 | 1625 | + nla_total_size(4) /* IFA_FLAGS */ |
af4d768a | 1626 | + nla_total_size(4) /* IFA_RT_PRIORITY */ |
63b5f152 | 1627 | + nla_total_size(sizeof(struct ifa_cacheinfo)); /* IFA_CACHEINFO */ |
339bf98f TG |
1628 | } |
1629 | ||
5c766d64 JP |
1630 | static inline u32 cstamp_delta(unsigned long cstamp) |
1631 | { | |
1632 | return (cstamp - INITIAL_JIFFIES) * 100UL / HZ; | |
1633 | } | |
1634 | ||
1635 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, | |
1636 | unsigned long tstamp, u32 preferred, u32 valid) | |
1637 | { | |
1638 | struct ifa_cacheinfo ci; | |
1639 | ||
1640 | ci.cstamp = cstamp_delta(cstamp); | |
1641 | ci.tstamp = cstamp_delta(tstamp); | |
1642 | ci.ifa_prefered = preferred; | |
1643 | ci.ifa_valid = valid; | |
1644 | ||
1645 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
1646 | } | |
1647 | ||
1da177e4 | 1648 | static int inet_fill_ifaddr(struct sk_buff *skb, struct in_ifaddr *ifa, |
978a46fa | 1649 | struct inet_fill_args *args) |
1da177e4 LT |
1650 | { |
1651 | struct ifaddrmsg *ifm; | |
1652 | struct nlmsghdr *nlh; | |
5c766d64 | 1653 | u32 preferred, valid; |
1da177e4 | 1654 | |
978a46fa CB |
1655 | nlh = nlmsg_put(skb, args->portid, args->seq, args->event, sizeof(*ifm), |
1656 | args->flags); | |
51456b29 | 1657 | if (!nlh) |
26932566 | 1658 | return -EMSGSIZE; |
47f68512 TG |
1659 | |
1660 | ifm = nlmsg_data(nlh); | |
1da177e4 LT |
1661 | ifm->ifa_family = AF_INET; |
1662 | ifm->ifa_prefixlen = ifa->ifa_prefixlen; | |
5c766d64 | 1663 | ifm->ifa_flags = ifa->ifa_flags; |
1da177e4 LT |
1664 | ifm->ifa_scope = ifa->ifa_scope; |
1665 | ifm->ifa_index = ifa->ifa_dev->dev->ifindex; | |
47f68512 | 1666 | |
978a46fa CB |
1667 | if (args->netnsid >= 0 && |
1668 | nla_put_s32(skb, IFA_TARGET_NETNSID, args->netnsid)) | |
d3807145 CB |
1669 | goto nla_put_failure; |
1670 | ||
5c766d64 JP |
1671 | if (!(ifm->ifa_flags & IFA_F_PERMANENT)) { |
1672 | preferred = ifa->ifa_preferred_lft; | |
1673 | valid = ifa->ifa_valid_lft; | |
1674 | if (preferred != INFINITY_LIFE_TIME) { | |
1675 | long tval = (jiffies - ifa->ifa_tstamp) / HZ; | |
1676 | ||
1677 | if (preferred > tval) | |
1678 | preferred -= tval; | |
1679 | else | |
1680 | preferred = 0; | |
1681 | if (valid != INFINITY_LIFE_TIME) { | |
1682 | if (valid > tval) | |
1683 | valid -= tval; | |
1684 | else | |
1685 | valid = 0; | |
1686 | } | |
1687 | } | |
1688 | } else { | |
1689 | preferred = INFINITY_LIFE_TIME; | |
1690 | valid = INFINITY_LIFE_TIME; | |
1691 | } | |
f3756b79 | 1692 | if ((ifa->ifa_address && |
930345ea | 1693 | nla_put_in_addr(skb, IFA_ADDRESS, ifa->ifa_address)) || |
f3756b79 | 1694 | (ifa->ifa_local && |
930345ea | 1695 | nla_put_in_addr(skb, IFA_LOCAL, ifa->ifa_local)) || |
f3756b79 | 1696 | (ifa->ifa_broadcast && |
930345ea | 1697 | nla_put_in_addr(skb, IFA_BROADCAST, ifa->ifa_broadcast)) || |
f3756b79 | 1698 | (ifa->ifa_label[0] && |
5c766d64 | 1699 | nla_put_string(skb, IFA_LABEL, ifa->ifa_label)) || |
ad6c8135 | 1700 | nla_put_u32(skb, IFA_FLAGS, ifa->ifa_flags) || |
af4d768a DA |
1701 | (ifa->ifa_rt_priority && |
1702 | nla_put_u32(skb, IFA_RT_PRIORITY, ifa->ifa_rt_priority)) || | |
5c766d64 JP |
1703 | put_cacheinfo(skb, ifa->ifa_cstamp, ifa->ifa_tstamp, |
1704 | preferred, valid)) | |
f3756b79 | 1705 | goto nla_put_failure; |
1da177e4 | 1706 | |
053c095a JB |
1707 | nlmsg_end(skb, nlh); |
1708 | return 0; | |
47f68512 TG |
1709 | |
1710 | nla_put_failure: | |
26932566 PM |
1711 | nlmsg_cancel(skb, nlh); |
1712 | return -EMSGSIZE; | |
1da177e4 LT |
1713 | } |
1714 | ||
c33078e3 DA |
1715 | static int inet_valid_dump_ifaddr_req(const struct nlmsghdr *nlh, |
1716 | struct inet_fill_args *fillargs, | |
1717 | struct net **tgt_net, struct sock *sk, | |
5fcd266a | 1718 | struct netlink_callback *cb) |
c33078e3 | 1719 | { |
5fcd266a | 1720 | struct netlink_ext_ack *extack = cb->extack; |
c33078e3 DA |
1721 | struct nlattr *tb[IFA_MAX+1]; |
1722 | struct ifaddrmsg *ifm; | |
1723 | int err, i; | |
1724 | ||
1725 | if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) { | |
1726 | NL_SET_ERR_MSG(extack, "ipv4: Invalid header for address dump request"); | |
1727 | return -EINVAL; | |
1728 | } | |
1729 | ||
1730 | ifm = nlmsg_data(nlh); | |
1731 | if (ifm->ifa_prefixlen || ifm->ifa_flags || ifm->ifa_scope) { | |
1732 | NL_SET_ERR_MSG(extack, "ipv4: Invalid values in header for address dump request"); | |
1733 | return -EINVAL; | |
1734 | } | |
5fcd266a DA |
1735 | |
1736 | fillargs->ifindex = ifm->ifa_index; | |
1737 | if (fillargs->ifindex) { | |
1738 | cb->answer_flags |= NLM_F_DUMP_FILTERED; | |
1739 | fillargs->flags |= NLM_F_DUMP_FILTERED; | |
c33078e3 DA |
1740 | } |
1741 | ||
8cb08174 JB |
1742 | err = nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, IFA_MAX, |
1743 | ifa_ipv4_policy, extack); | |
c33078e3 DA |
1744 | if (err < 0) |
1745 | return err; | |
1746 | ||
1747 | for (i = 0; i <= IFA_MAX; ++i) { | |
1748 | if (!tb[i]) | |
1749 | continue; | |
1750 | ||
1751 | if (i == IFA_TARGET_NETNSID) { | |
1752 | struct net *net; | |
1753 | ||
1754 | fillargs->netnsid = nla_get_s32(tb[i]); | |
1755 | ||
1756 | net = rtnl_get_net_ns_capable(sk, fillargs->netnsid); | |
1757 | if (IS_ERR(net)) { | |
bf4cc40e | 1758 | fillargs->netnsid = -1; |
c33078e3 DA |
1759 | NL_SET_ERR_MSG(extack, "ipv4: Invalid target network namespace id"); |
1760 | return PTR_ERR(net); | |
1761 | } | |
1762 | *tgt_net = net; | |
1763 | } else { | |
1764 | NL_SET_ERR_MSG(extack, "ipv4: Unsupported attribute in dump request"); | |
1765 | return -EINVAL; | |
1766 | } | |
1767 | } | |
1768 | ||
1769 | return 0; | |
1770 | } | |
1771 | ||
1c98eca4 DA |
1772 | static int in_dev_dump_addr(struct in_device *in_dev, struct sk_buff *skb, |
1773 | struct netlink_callback *cb, int s_ip_idx, | |
1774 | struct inet_fill_args *fillargs) | |
1775 | { | |
1776 | struct in_ifaddr *ifa; | |
1777 | int ip_idx = 0; | |
1778 | int err; | |
1779 | ||
d3e6e285 | 1780 | in_dev_for_each_ifa_rtnl(ifa, in_dev) { |
ef11db33 FW |
1781 | if (ip_idx < s_ip_idx) { |
1782 | ip_idx++; | |
1c98eca4 | 1783 | continue; |
ef11db33 | 1784 | } |
1c98eca4 DA |
1785 | err = inet_fill_ifaddr(skb, ifa, fillargs); |
1786 | if (err < 0) | |
1787 | goto done; | |
1788 | ||
1789 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); | |
ef11db33 | 1790 | ip_idx++; |
1c98eca4 DA |
1791 | } |
1792 | err = 0; | |
1793 | ||
1794 | done: | |
1795 | cb->args[2] = ip_idx; | |
1796 | ||
1797 | return err; | |
1798 | } | |
1799 | ||
1da177e4 LT |
1800 | static int inet_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) |
1801 | { | |
c33078e3 | 1802 | const struct nlmsghdr *nlh = cb->nlh; |
978a46fa CB |
1803 | struct inet_fill_args fillargs = { |
1804 | .portid = NETLINK_CB(cb->skb).portid, | |
c33078e3 | 1805 | .seq = nlh->nlmsg_seq, |
978a46fa CB |
1806 | .event = RTM_NEWADDR, |
1807 | .flags = NLM_F_MULTI, | |
1808 | .netnsid = -1, | |
1809 | }; | |
3b1e0a65 | 1810 | struct net *net = sock_net(skb->sk); |
d3807145 | 1811 | struct net *tgt_net = net; |
eec4df98 ED |
1812 | int h, s_h; |
1813 | int idx, s_idx; | |
1c98eca4 | 1814 | int s_ip_idx; |
1da177e4 LT |
1815 | struct net_device *dev; |
1816 | struct in_device *in_dev; | |
eec4df98 | 1817 | struct hlist_head *head; |
d7e38611 | 1818 | int err = 0; |
1da177e4 | 1819 | |
eec4df98 ED |
1820 | s_h = cb->args[0]; |
1821 | s_idx = idx = cb->args[1]; | |
1c98eca4 | 1822 | s_ip_idx = cb->args[2]; |
eec4df98 | 1823 | |
c33078e3 | 1824 | if (cb->strict_check) { |
c33078e3 | 1825 | err = inet_valid_dump_ifaddr_req(nlh, &fillargs, &tgt_net, |
5fcd266a | 1826 | skb->sk, cb); |
c33078e3 | 1827 | if (err < 0) |
d7e38611 | 1828 | goto put_tgt_net; |
5fcd266a | 1829 | |
d7e38611 | 1830 | err = 0; |
5fcd266a DA |
1831 | if (fillargs.ifindex) { |
1832 | dev = __dev_get_by_index(tgt_net, fillargs.ifindex); | |
d7e38611 DA |
1833 | if (!dev) { |
1834 | err = -ENODEV; | |
1835 | goto put_tgt_net; | |
1836 | } | |
5fcd266a DA |
1837 | |
1838 | in_dev = __in_dev_get_rtnl(dev); | |
1839 | if (in_dev) { | |
1840 | err = in_dev_dump_addr(in_dev, skb, cb, s_ip_idx, | |
1841 | &fillargs); | |
1842 | } | |
1843 | goto put_tgt_net; | |
1844 | } | |
d3807145 CB |
1845 | } |
1846 | ||
eec4df98 ED |
1847 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
1848 | idx = 0; | |
d3807145 | 1849 | head = &tgt_net->dev_index_head[h]; |
eec4df98 | 1850 | rcu_read_lock(); |
d3807145 CB |
1851 | cb->seq = atomic_read(&tgt_net->ipv4.dev_addr_genid) ^ |
1852 | tgt_net->dev_base_seq; | |
b67bfe0d | 1853 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
eec4df98 ED |
1854 | if (idx < s_idx) |
1855 | goto cont; | |
4b97efdf | 1856 | if (h > s_h || idx > s_idx) |
eec4df98 ED |
1857 | s_ip_idx = 0; |
1858 | in_dev = __in_dev_get_rcu(dev); | |
1859 | if (!in_dev) | |
1860 | goto cont; | |
1da177e4 | 1861 | |
1c98eca4 DA |
1862 | err = in_dev_dump_addr(in_dev, skb, cb, s_ip_idx, |
1863 | &fillargs); | |
1864 | if (err < 0) { | |
1865 | rcu_read_unlock(); | |
1866 | goto done; | |
eec4df98 | 1867 | } |
7562f876 | 1868 | cont: |
eec4df98 ED |
1869 | idx++; |
1870 | } | |
1871 | rcu_read_unlock(); | |
1da177e4 LT |
1872 | } |
1873 | ||
1874 | done: | |
eec4df98 ED |
1875 | cb->args[0] = h; |
1876 | cb->args[1] = idx; | |
5fcd266a | 1877 | put_tgt_net: |
978a46fa | 1878 | if (fillargs.netnsid >= 0) |
d3807145 | 1879 | put_net(tgt_net); |
1da177e4 | 1880 | |
7c1e8a38 | 1881 | return skb->len ? : err; |
1da177e4 LT |
1882 | } |
1883 | ||
539afedf | 1884 | static void rtmsg_ifa(int event, struct in_ifaddr *ifa, struct nlmsghdr *nlh, |
15e47304 | 1885 | u32 portid) |
1da177e4 | 1886 | { |
978a46fa CB |
1887 | struct inet_fill_args fillargs = { |
1888 | .portid = portid, | |
1889 | .seq = nlh ? nlh->nlmsg_seq : 0, | |
1890 | .event = event, | |
1891 | .flags = 0, | |
1892 | .netnsid = -1, | |
1893 | }; | |
47f68512 | 1894 | struct sk_buff *skb; |
d6062cbb | 1895 | int err = -ENOBUFS; |
4b8aa9ab | 1896 | struct net *net; |
1da177e4 | 1897 | |
c346dca1 | 1898 | net = dev_net(ifa->ifa_dev->dev); |
339bf98f | 1899 | skb = nlmsg_new(inet_nlmsg_size(), GFP_KERNEL); |
51456b29 | 1900 | if (!skb) |
d6062cbb TG |
1901 | goto errout; |
1902 | ||
978a46fa | 1903 | err = inet_fill_ifaddr(skb, ifa, &fillargs); |
26932566 PM |
1904 | if (err < 0) { |
1905 | /* -EMSGSIZE implies BUG in inet_nlmsg_size() */ | |
1906 | WARN_ON(err == -EMSGSIZE); | |
1907 | kfree_skb(skb); | |
1908 | goto errout; | |
1909 | } | |
15e47304 | 1910 | rtnl_notify(skb, net, portid, RTNLGRP_IPV4_IFADDR, nlh, GFP_KERNEL); |
1ce85fe4 | 1911 | return; |
d6062cbb TG |
1912 | errout: |
1913 | if (err < 0) | |
4b8aa9ab | 1914 | rtnl_set_sk_err(net, RTNLGRP_IPV4_IFADDR, err); |
1da177e4 LT |
1915 | } |
1916 | ||
b1974ed0 AR |
1917 | static size_t inet_get_link_af_size(const struct net_device *dev, |
1918 | u32 ext_filter_mask) | |
9f0f7272 | 1919 | { |
1fc19aff | 1920 | struct in_device *in_dev = rcu_dereference_rtnl(dev->ip_ptr); |
9f0f7272 TG |
1921 | |
1922 | if (!in_dev) | |
1923 | return 0; | |
1924 | ||
1925 | return nla_total_size(IPV4_DEVCONF_MAX * 4); /* IFLA_INET_CONF */ | |
1926 | } | |
1927 | ||
d5566fd7 SV |
1928 | static int inet_fill_link_af(struct sk_buff *skb, const struct net_device *dev, |
1929 | u32 ext_filter_mask) | |
9f0f7272 | 1930 | { |
1fc19aff | 1931 | struct in_device *in_dev = rcu_dereference_rtnl(dev->ip_ptr); |
9f0f7272 TG |
1932 | struct nlattr *nla; |
1933 | int i; | |
1934 | ||
1935 | if (!in_dev) | |
1936 | return -ENODATA; | |
1937 | ||
1938 | nla = nla_reserve(skb, IFLA_INET_CONF, IPV4_DEVCONF_MAX * 4); | |
51456b29 | 1939 | if (!nla) |
9f0f7272 TG |
1940 | return -EMSGSIZE; |
1941 | ||
1942 | for (i = 0; i < IPV4_DEVCONF_MAX; i++) | |
1943 | ((u32 *) nla_data(nla))[i] = in_dev->cnf.data[i]; | |
1944 | ||
1945 | return 0; | |
1946 | } | |
1947 | ||
1948 | static const struct nla_policy inet_af_policy[IFLA_INET_MAX+1] = { | |
1949 | [IFLA_INET_CONF] = { .type = NLA_NESTED }, | |
1950 | }; | |
1951 | ||
cf7afbfe TG |
1952 | static int inet_validate_link_af(const struct net_device *dev, |
1953 | const struct nlattr *nla) | |
9f0f7272 | 1954 | { |
9f0f7272 TG |
1955 | struct nlattr *a, *tb[IFLA_INET_MAX+1]; |
1956 | int err, rem; | |
1957 | ||
5fa85a09 | 1958 | if (dev && !__in_dev_get_rcu(dev)) |
cf7afbfe | 1959 | return -EAFNOSUPPORT; |
9f0f7272 | 1960 | |
8cb08174 JB |
1961 | err = nla_parse_nested_deprecated(tb, IFLA_INET_MAX, nla, |
1962 | inet_af_policy, NULL); | |
9f0f7272 TG |
1963 | if (err < 0) |
1964 | return err; | |
1965 | ||
1966 | if (tb[IFLA_INET_CONF]) { | |
1967 | nla_for_each_nested(a, tb[IFLA_INET_CONF], rem) { | |
1968 | int cfgid = nla_type(a); | |
1969 | ||
1970 | if (nla_len(a) < 4) | |
1971 | return -EINVAL; | |
1972 | ||
1973 | if (cfgid <= 0 || cfgid > IPV4_DEVCONF_MAX) | |
1974 | return -EINVAL; | |
1975 | } | |
1976 | } | |
1977 | ||
cf7afbfe TG |
1978 | return 0; |
1979 | } | |
1980 | ||
3583a4e8 SH |
1981 | static int inet_set_link_af(struct net_device *dev, const struct nlattr *nla, |
1982 | struct netlink_ext_ack *extack) | |
cf7afbfe | 1983 | { |
5fa85a09 | 1984 | struct in_device *in_dev = __in_dev_get_rcu(dev); |
cf7afbfe TG |
1985 | struct nlattr *a, *tb[IFLA_INET_MAX+1]; |
1986 | int rem; | |
1987 | ||
1988 | if (!in_dev) | |
1989 | return -EAFNOSUPPORT; | |
1990 | ||
8cb08174 | 1991 | if (nla_parse_nested_deprecated(tb, IFLA_INET_MAX, nla, NULL, NULL) < 0) |
cf7afbfe TG |
1992 | BUG(); |
1993 | ||
9f0f7272 TG |
1994 | if (tb[IFLA_INET_CONF]) { |
1995 | nla_for_each_nested(a, tb[IFLA_INET_CONF], rem) | |
1996 | ipv4_devconf_set(in_dev, nla_type(a), nla_get_u32(a)); | |
1997 | } | |
1998 | ||
1999 | return 0; | |
2000 | } | |
2001 | ||
edc9e748 ND |
2002 | static int inet_netconf_msgsize_devconf(int type) |
2003 | { | |
2004 | int size = NLMSG_ALIGN(sizeof(struct netconfmsg)) | |
2005 | + nla_total_size(4); /* NETCONFA_IFINDEX */ | |
136ba622 | 2006 | bool all = false; |
edc9e748 | 2007 | |
136ba622 ZS |
2008 | if (type == NETCONFA_ALL) |
2009 | all = true; | |
2010 | ||
2011 | if (all || type == NETCONFA_FORWARDING) | |
edc9e748 | 2012 | size += nla_total_size(4); |
136ba622 | 2013 | if (all || type == NETCONFA_RP_FILTER) |
cc535dfb | 2014 | size += nla_total_size(4); |
136ba622 | 2015 | if (all || type == NETCONFA_MC_FORWARDING) |
d67b8c61 | 2016 | size += nla_total_size(4); |
5cbf777c XL |
2017 | if (all || type == NETCONFA_BC_FORWARDING) |
2018 | size += nla_total_size(4); | |
136ba622 | 2019 | if (all || type == NETCONFA_PROXY_NEIGH) |
f085ff1c | 2020 | size += nla_total_size(4); |
136ba622 | 2021 | if (all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) |
974d7af5 | 2022 | size += nla_total_size(4); |
edc9e748 ND |
2023 | |
2024 | return size; | |
2025 | } | |
2026 | ||
2027 | static int inet_netconf_fill_devconf(struct sk_buff *skb, int ifindex, | |
2028 | struct ipv4_devconf *devconf, u32 portid, | |
2029 | u32 seq, int event, unsigned int flags, | |
2030 | int type) | |
2031 | { | |
2032 | struct nlmsghdr *nlh; | |
2033 | struct netconfmsg *ncm; | |
136ba622 | 2034 | bool all = false; |
edc9e748 ND |
2035 | |
2036 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg), | |
2037 | flags); | |
51456b29 | 2038 | if (!nlh) |
edc9e748 ND |
2039 | return -EMSGSIZE; |
2040 | ||
136ba622 ZS |
2041 | if (type == NETCONFA_ALL) |
2042 | all = true; | |
2043 | ||
edc9e748 ND |
2044 | ncm = nlmsg_data(nlh); |
2045 | ncm->ncm_family = AF_INET; | |
2046 | ||
2047 | if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0) | |
2048 | goto nla_put_failure; | |
2049 | ||
b5c9641d DA |
2050 | if (!devconf) |
2051 | goto out; | |
2052 | ||
136ba622 | 2053 | if ((all || type == NETCONFA_FORWARDING) && |
edc9e748 ND |
2054 | nla_put_s32(skb, NETCONFA_FORWARDING, |
2055 | IPV4_DEVCONF(*devconf, FORWARDING)) < 0) | |
2056 | goto nla_put_failure; | |
136ba622 | 2057 | if ((all || type == NETCONFA_RP_FILTER) && |
cc535dfb ND |
2058 | nla_put_s32(skb, NETCONFA_RP_FILTER, |
2059 | IPV4_DEVCONF(*devconf, RP_FILTER)) < 0) | |
2060 | goto nla_put_failure; | |
136ba622 | 2061 | if ((all || type == NETCONFA_MC_FORWARDING) && |
d67b8c61 ND |
2062 | nla_put_s32(skb, NETCONFA_MC_FORWARDING, |
2063 | IPV4_DEVCONF(*devconf, MC_FORWARDING)) < 0) | |
2064 | goto nla_put_failure; | |
5cbf777c XL |
2065 | if ((all || type == NETCONFA_BC_FORWARDING) && |
2066 | nla_put_s32(skb, NETCONFA_BC_FORWARDING, | |
2067 | IPV4_DEVCONF(*devconf, BC_FORWARDING)) < 0) | |
2068 | goto nla_put_failure; | |
136ba622 | 2069 | if ((all || type == NETCONFA_PROXY_NEIGH) && |
09aea5df | 2070 | nla_put_s32(skb, NETCONFA_PROXY_NEIGH, |
f085ff1c | 2071 | IPV4_DEVCONF(*devconf, PROXY_ARP)) < 0) |
2072 | goto nla_put_failure; | |
136ba622 | 2073 | if ((all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) && |
974d7af5 AG |
2074 | nla_put_s32(skb, NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, |
2075 | IPV4_DEVCONF(*devconf, IGNORE_ROUTES_WITH_LINKDOWN)) < 0) | |
2076 | goto nla_put_failure; | |
edc9e748 | 2077 | |
b5c9641d | 2078 | out: |
053c095a JB |
2079 | nlmsg_end(skb, nlh); |
2080 | return 0; | |
edc9e748 ND |
2081 | |
2082 | nla_put_failure: | |
2083 | nlmsg_cancel(skb, nlh); | |
2084 | return -EMSGSIZE; | |
2085 | } | |
2086 | ||
3b022865 DA |
2087 | void inet_netconf_notify_devconf(struct net *net, int event, int type, |
2088 | int ifindex, struct ipv4_devconf *devconf) | |
edc9e748 ND |
2089 | { |
2090 | struct sk_buff *skb; | |
2091 | int err = -ENOBUFS; | |
2092 | ||
fa17806c | 2093 | skb = nlmsg_new(inet_netconf_msgsize_devconf(type), GFP_KERNEL); |
51456b29 | 2094 | if (!skb) |
edc9e748 ND |
2095 | goto errout; |
2096 | ||
2097 | err = inet_netconf_fill_devconf(skb, ifindex, devconf, 0, 0, | |
3b022865 | 2098 | event, 0, type); |
edc9e748 ND |
2099 | if (err < 0) { |
2100 | /* -EMSGSIZE implies BUG in inet_netconf_msgsize_devconf() */ | |
2101 | WARN_ON(err == -EMSGSIZE); | |
2102 | kfree_skb(skb); | |
2103 | goto errout; | |
2104 | } | |
fa17806c | 2105 | rtnl_notify(skb, net, 0, RTNLGRP_IPV4_NETCONF, NULL, GFP_KERNEL); |
edc9e748 ND |
2106 | return; |
2107 | errout: | |
2108 | if (err < 0) | |
2109 | rtnl_set_sk_err(net, RTNLGRP_IPV4_NETCONF, err); | |
2110 | } | |
2111 | ||
9e551110 ND |
2112 | static const struct nla_policy devconf_ipv4_policy[NETCONFA_MAX+1] = { |
2113 | [NETCONFA_IFINDEX] = { .len = sizeof(int) }, | |
2114 | [NETCONFA_FORWARDING] = { .len = sizeof(int) }, | |
cc535dfb | 2115 | [NETCONFA_RP_FILTER] = { .len = sizeof(int) }, |
09aea5df | 2116 | [NETCONFA_PROXY_NEIGH] = { .len = sizeof(int) }, |
974d7af5 | 2117 | [NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN] = { .len = sizeof(int) }, |
9e551110 ND |
2118 | }; |
2119 | ||
eede370d JK |
2120 | static int inet_netconf_valid_get_req(struct sk_buff *skb, |
2121 | const struct nlmsghdr *nlh, | |
2122 | struct nlattr **tb, | |
2123 | struct netlink_ext_ack *extack) | |
2124 | { | |
2125 | int i, err; | |
2126 | ||
2127 | if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(struct netconfmsg))) { | |
2128 | NL_SET_ERR_MSG(extack, "ipv4: Invalid header for netconf get request"); | |
2129 | return -EINVAL; | |
2130 | } | |
2131 | ||
2132 | if (!netlink_strict_get_check(skb)) | |
8cb08174 JB |
2133 | return nlmsg_parse_deprecated(nlh, sizeof(struct netconfmsg), |
2134 | tb, NETCONFA_MAX, | |
2135 | devconf_ipv4_policy, extack); | |
eede370d | 2136 | |
8cb08174 JB |
2137 | err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct netconfmsg), |
2138 | tb, NETCONFA_MAX, | |
2139 | devconf_ipv4_policy, extack); | |
eede370d JK |
2140 | if (err) |
2141 | return err; | |
2142 | ||
2143 | for (i = 0; i <= NETCONFA_MAX; i++) { | |
2144 | if (!tb[i]) | |
2145 | continue; | |
2146 | ||
2147 | switch (i) { | |
2148 | case NETCONFA_IFINDEX: | |
2149 | break; | |
2150 | default: | |
2151 | NL_SET_ERR_MSG(extack, "ipv4: Unsupported attribute in netconf get request"); | |
2152 | return -EINVAL; | |
2153 | } | |
2154 | } | |
2155 | ||
2156 | return 0; | |
2157 | } | |
2158 | ||
9e551110 | 2159 | static int inet_netconf_get_devconf(struct sk_buff *in_skb, |
c21ef3e3 DA |
2160 | struct nlmsghdr *nlh, |
2161 | struct netlink_ext_ack *extack) | |
9e551110 ND |
2162 | { |
2163 | struct net *net = sock_net(in_skb->sk); | |
2164 | struct nlattr *tb[NETCONFA_MAX+1]; | |
9e551110 ND |
2165 | struct sk_buff *skb; |
2166 | struct ipv4_devconf *devconf; | |
2167 | struct in_device *in_dev; | |
2168 | struct net_device *dev; | |
2169 | int ifindex; | |
2170 | int err; | |
2171 | ||
eede370d JK |
2172 | err = inet_netconf_valid_get_req(in_skb, nlh, tb, extack); |
2173 | if (err) | |
9e551110 ND |
2174 | goto errout; |
2175 | ||
a97eb33f | 2176 | err = -EINVAL; |
9e551110 ND |
2177 | if (!tb[NETCONFA_IFINDEX]) |
2178 | goto errout; | |
2179 | ||
2180 | ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]); | |
2181 | switch (ifindex) { | |
2182 | case NETCONFA_IFINDEX_ALL: | |
2183 | devconf = net->ipv4.devconf_all; | |
2184 | break; | |
2185 | case NETCONFA_IFINDEX_DEFAULT: | |
2186 | devconf = net->ipv4.devconf_dflt; | |
2187 | break; | |
2188 | default: | |
2189 | dev = __dev_get_by_index(net, ifindex); | |
51456b29 | 2190 | if (!dev) |
9e551110 ND |
2191 | goto errout; |
2192 | in_dev = __in_dev_get_rtnl(dev); | |
51456b29 | 2193 | if (!in_dev) |
9e551110 ND |
2194 | goto errout; |
2195 | devconf = &in_dev->cnf; | |
2196 | break; | |
2197 | } | |
2198 | ||
2199 | err = -ENOBUFS; | |
fa17806c | 2200 | skb = nlmsg_new(inet_netconf_msgsize_devconf(NETCONFA_ALL), GFP_KERNEL); |
51456b29 | 2201 | if (!skb) |
9e551110 ND |
2202 | goto errout; |
2203 | ||
2204 | err = inet_netconf_fill_devconf(skb, ifindex, devconf, | |
2205 | NETLINK_CB(in_skb).portid, | |
2206 | nlh->nlmsg_seq, RTM_NEWNETCONF, 0, | |
136ba622 | 2207 | NETCONFA_ALL); |
9e551110 ND |
2208 | if (err < 0) { |
2209 | /* -EMSGSIZE implies BUG in inet_netconf_msgsize_devconf() */ | |
2210 | WARN_ON(err == -EMSGSIZE); | |
2211 | kfree_skb(skb); | |
2212 | goto errout; | |
2213 | } | |
2214 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); | |
2215 | errout: | |
2216 | return err; | |
2217 | } | |
2218 | ||
7a674200 ND |
2219 | static int inet_netconf_dump_devconf(struct sk_buff *skb, |
2220 | struct netlink_callback *cb) | |
2221 | { | |
addd383f | 2222 | const struct nlmsghdr *nlh = cb->nlh; |
7a674200 ND |
2223 | struct net *net = sock_net(skb->sk); |
2224 | int h, s_h; | |
2225 | int idx, s_idx; | |
2226 | struct net_device *dev; | |
2227 | struct in_device *in_dev; | |
2228 | struct hlist_head *head; | |
2229 | ||
addd383f DA |
2230 | if (cb->strict_check) { |
2231 | struct netlink_ext_ack *extack = cb->extack; | |
2232 | struct netconfmsg *ncm; | |
2233 | ||
2234 | if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ncm))) { | |
2235 | NL_SET_ERR_MSG(extack, "ipv4: Invalid header for netconf dump request"); | |
2236 | return -EINVAL; | |
2237 | } | |
2238 | ||
2239 | if (nlmsg_attrlen(nlh, sizeof(*ncm))) { | |
2240 | NL_SET_ERR_MSG(extack, "ipv4: Invalid data after header in netconf dump request"); | |
2241 | return -EINVAL; | |
2242 | } | |
2243 | } | |
2244 | ||
7a674200 ND |
2245 | s_h = cb->args[0]; |
2246 | s_idx = idx = cb->args[1]; | |
2247 | ||
2248 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
2249 | idx = 0; | |
2250 | head = &net->dev_index_head[h]; | |
2251 | rcu_read_lock(); | |
0465277f ND |
2252 | cb->seq = atomic_read(&net->ipv4.dev_addr_genid) ^ |
2253 | net->dev_base_seq; | |
7a674200 ND |
2254 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
2255 | if (idx < s_idx) | |
2256 | goto cont; | |
2257 | in_dev = __in_dev_get_rcu(dev); | |
2258 | if (!in_dev) | |
2259 | goto cont; | |
2260 | ||
2261 | if (inet_netconf_fill_devconf(skb, dev->ifindex, | |
2262 | &in_dev->cnf, | |
2263 | NETLINK_CB(cb->skb).portid, | |
addd383f | 2264 | nlh->nlmsg_seq, |
7a674200 ND |
2265 | RTM_NEWNETCONF, |
2266 | NLM_F_MULTI, | |
136ba622 | 2267 | NETCONFA_ALL) < 0) { |
7a674200 ND |
2268 | rcu_read_unlock(); |
2269 | goto done; | |
2270 | } | |
0465277f | 2271 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
7a674200 ND |
2272 | cont: |
2273 | idx++; | |
2274 | } | |
2275 | rcu_read_unlock(); | |
2276 | } | |
2277 | if (h == NETDEV_HASHENTRIES) { | |
2278 | if (inet_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL, | |
2279 | net->ipv4.devconf_all, | |
2280 | NETLINK_CB(cb->skb).portid, | |
addd383f | 2281 | nlh->nlmsg_seq, |
7a674200 | 2282 | RTM_NEWNETCONF, NLM_F_MULTI, |
136ba622 | 2283 | NETCONFA_ALL) < 0) |
7a674200 ND |
2284 | goto done; |
2285 | else | |
2286 | h++; | |
2287 | } | |
2288 | if (h == NETDEV_HASHENTRIES + 1) { | |
2289 | if (inet_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT, | |
2290 | net->ipv4.devconf_dflt, | |
2291 | NETLINK_CB(cb->skb).portid, | |
addd383f | 2292 | nlh->nlmsg_seq, |
7a674200 | 2293 | RTM_NEWNETCONF, NLM_F_MULTI, |
136ba622 | 2294 | NETCONFA_ALL) < 0) |
7a674200 ND |
2295 | goto done; |
2296 | else | |
2297 | h++; | |
2298 | } | |
2299 | done: | |
2300 | cb->args[0] = h; | |
2301 | cb->args[1] = idx; | |
2302 | ||
2303 | return skb->len; | |
2304 | } | |
2305 | ||
1da177e4 LT |
2306 | #ifdef CONFIG_SYSCTL |
2307 | ||
c0ce9fb3 | 2308 | static void devinet_copy_dflt_conf(struct net *net, int i) |
31be3085 HX |
2309 | { |
2310 | struct net_device *dev; | |
2311 | ||
c6d14c84 ED |
2312 | rcu_read_lock(); |
2313 | for_each_netdev_rcu(net, dev) { | |
31be3085 | 2314 | struct in_device *in_dev; |
c6d14c84 | 2315 | |
31be3085 HX |
2316 | in_dev = __in_dev_get_rcu(dev); |
2317 | if (in_dev && !test_bit(i, in_dev->cnf.state)) | |
9355bbd6 | 2318 | in_dev->cnf.data[i] = net->ipv4.devconf_dflt->data[i]; |
31be3085 | 2319 | } |
c6d14c84 | 2320 | rcu_read_unlock(); |
31be3085 HX |
2321 | } |
2322 | ||
c6d14c84 | 2323 | /* called with RTNL locked */ |
c0ce9fb3 | 2324 | static void inet_forward_change(struct net *net) |
68dd299b PE |
2325 | { |
2326 | struct net_device *dev; | |
586f1211 | 2327 | int on = IPV4_DEVCONF_ALL(net, FORWARDING); |
68dd299b | 2328 | |
586f1211 | 2329 | IPV4_DEVCONF_ALL(net, ACCEPT_REDIRECTS) = !on; |
9355bbd6 | 2330 | IPV4_DEVCONF_DFLT(net, FORWARDING) = on; |
3b022865 DA |
2331 | inet_netconf_notify_devconf(net, RTM_NEWNETCONF, |
2332 | NETCONFA_FORWARDING, | |
edc9e748 ND |
2333 | NETCONFA_IFINDEX_ALL, |
2334 | net->ipv4.devconf_all); | |
3b022865 DA |
2335 | inet_netconf_notify_devconf(net, RTM_NEWNETCONF, |
2336 | NETCONFA_FORWARDING, | |
edc9e748 ND |
2337 | NETCONFA_IFINDEX_DEFAULT, |
2338 | net->ipv4.devconf_dflt); | |
68dd299b | 2339 | |
c0ce9fb3 | 2340 | for_each_netdev(net, dev) { |
68dd299b | 2341 | struct in_device *in_dev; |
fa17806c | 2342 | |
0187bdfb BH |
2343 | if (on) |
2344 | dev_disable_lro(dev); | |
fa17806c ED |
2345 | |
2346 | in_dev = __in_dev_get_rtnl(dev); | |
edc9e748 | 2347 | if (in_dev) { |
68dd299b | 2348 | IN_DEV_CONF_SET(in_dev, FORWARDING, on); |
3b022865 DA |
2349 | inet_netconf_notify_devconf(net, RTM_NEWNETCONF, |
2350 | NETCONFA_FORWARDING, | |
edc9e748 ND |
2351 | dev->ifindex, &in_dev->cnf); |
2352 | } | |
68dd299b | 2353 | } |
68dd299b PE |
2354 | } |
2355 | ||
f085ff1c | 2356 | static int devinet_conf_ifindex(struct net *net, struct ipv4_devconf *cnf) |
2357 | { | |
2358 | if (cnf == net->ipv4.devconf_dflt) | |
2359 | return NETCONFA_IFINDEX_DEFAULT; | |
2360 | else if (cnf == net->ipv4.devconf_all) | |
2361 | return NETCONFA_IFINDEX_ALL; | |
2362 | else { | |
2363 | struct in_device *idev | |
2364 | = container_of(cnf, struct in_device, cnf); | |
2365 | return idev->dev->ifindex; | |
2366 | } | |
2367 | } | |
2368 | ||
fe2c6338 | 2369 | static int devinet_conf_proc(struct ctl_table *ctl, int write, |
32927393 | 2370 | void *buffer, size_t *lenp, loff_t *ppos) |
31be3085 | 2371 | { |
d01ff0a0 | 2372 | int old_value = *(int *)ctl->data; |
8d65af78 | 2373 | int ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
d01ff0a0 | 2374 | int new_value = *(int *)ctl->data; |
31be3085 HX |
2375 | |
2376 | if (write) { | |
2377 | struct ipv4_devconf *cnf = ctl->extra1; | |
c0ce9fb3 | 2378 | struct net *net = ctl->extra2; |
31be3085 | 2379 | int i = (int *)ctl->data - cnf->data; |
f085ff1c | 2380 | int ifindex; |
31be3085 HX |
2381 | |
2382 | set_bit(i, cnf->state); | |
2383 | ||
9355bbd6 | 2384 | if (cnf == net->ipv4.devconf_dflt) |
c0ce9fb3 | 2385 | devinet_copy_dflt_conf(net, i); |
d0daebc3 TG |
2386 | if (i == IPV4_DEVCONF_ACCEPT_LOCAL - 1 || |
2387 | i == IPV4_DEVCONF_ROUTE_LOCALNET - 1) | |
d01ff0a0 | 2388 | if ((new_value == 0) && (old_value != 0)) |
4ccfe6d4 | 2389 | rt_cache_flush(net); |
f085ff1c | 2390 | |
5cbf777c XL |
2391 | if (i == IPV4_DEVCONF_BC_FORWARDING - 1 && |
2392 | new_value != old_value) | |
2393 | rt_cache_flush(net); | |
2394 | ||
cc535dfb ND |
2395 | if (i == IPV4_DEVCONF_RP_FILTER - 1 && |
2396 | new_value != old_value) { | |
f085ff1c | 2397 | ifindex = devinet_conf_ifindex(net, cnf); |
3b022865 DA |
2398 | inet_netconf_notify_devconf(net, RTM_NEWNETCONF, |
2399 | NETCONFA_RP_FILTER, | |
cc535dfb ND |
2400 | ifindex, cnf); |
2401 | } | |
f085ff1c | 2402 | if (i == IPV4_DEVCONF_PROXY_ARP - 1 && |
2403 | new_value != old_value) { | |
2404 | ifindex = devinet_conf_ifindex(net, cnf); | |
3b022865 DA |
2405 | inet_netconf_notify_devconf(net, RTM_NEWNETCONF, |
2406 | NETCONFA_PROXY_NEIGH, | |
f085ff1c | 2407 | ifindex, cnf); |
2408 | } | |
974d7af5 AG |
2409 | if (i == IPV4_DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN - 1 && |
2410 | new_value != old_value) { | |
2411 | ifindex = devinet_conf_ifindex(net, cnf); | |
3b022865 DA |
2412 | inet_netconf_notify_devconf(net, RTM_NEWNETCONF, |
2413 | NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, | |
974d7af5 AG |
2414 | ifindex, cnf); |
2415 | } | |
31be3085 HX |
2416 | } |
2417 | ||
2418 | return ret; | |
2419 | } | |
2420 | ||
fe2c6338 | 2421 | static int devinet_sysctl_forward(struct ctl_table *ctl, int write, |
32927393 | 2422 | void *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
2423 | { |
2424 | int *valp = ctl->data; | |
2425 | int val = *valp; | |
88af182e | 2426 | loff_t pos = *ppos; |
8d65af78 | 2427 | int ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
1da177e4 LT |
2428 | |
2429 | if (write && *valp != val) { | |
c0ce9fb3 PE |
2430 | struct net *net = ctl->extra2; |
2431 | ||
0187bdfb | 2432 | if (valp != &IPV4_DEVCONF_DFLT(net, FORWARDING)) { |
88af182e EB |
2433 | if (!rtnl_trylock()) { |
2434 | /* Restore the original values before restarting */ | |
2435 | *valp = val; | |
2436 | *ppos = pos; | |
9b8adb5e | 2437 | return restart_syscall(); |
88af182e | 2438 | } |
0187bdfb BH |
2439 | if (valp == &IPV4_DEVCONF_ALL(net, FORWARDING)) { |
2440 | inet_forward_change(net); | |
edc9e748 | 2441 | } else { |
0187bdfb BH |
2442 | struct ipv4_devconf *cnf = ctl->extra1; |
2443 | struct in_device *idev = | |
2444 | container_of(cnf, struct in_device, cnf); | |
edc9e748 ND |
2445 | if (*valp) |
2446 | dev_disable_lro(idev->dev); | |
3b022865 | 2447 | inet_netconf_notify_devconf(net, RTM_NEWNETCONF, |
edc9e748 ND |
2448 | NETCONFA_FORWARDING, |
2449 | idev->dev->ifindex, | |
2450 | cnf); | |
0187bdfb BH |
2451 | } |
2452 | rtnl_unlock(); | |
4ccfe6d4 | 2453 | rt_cache_flush(net); |
edc9e748 | 2454 | } else |
3b022865 DA |
2455 | inet_netconf_notify_devconf(net, RTM_NEWNETCONF, |
2456 | NETCONFA_FORWARDING, | |
edc9e748 ND |
2457 | NETCONFA_IFINDEX_DEFAULT, |
2458 | net->ipv4.devconf_dflt); | |
1da177e4 LT |
2459 | } |
2460 | ||
2461 | return ret; | |
2462 | } | |
2463 | ||
fe2c6338 | 2464 | static int ipv4_doint_and_flush(struct ctl_table *ctl, int write, |
32927393 | 2465 | void *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
2466 | { |
2467 | int *valp = ctl->data; | |
2468 | int val = *valp; | |
8d65af78 | 2469 | int ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
76e6ebfb | 2470 | struct net *net = ctl->extra2; |
1da177e4 LT |
2471 | |
2472 | if (write && *valp != val) | |
4ccfe6d4 | 2473 | rt_cache_flush(net); |
1da177e4 LT |
2474 | |
2475 | return ret; | |
2476 | } | |
2477 | ||
f8572d8f | 2478 | #define DEVINET_SYSCTL_ENTRY(attr, name, mval, proc) \ |
42f811b8 | 2479 | { \ |
42f811b8 HX |
2480 | .procname = name, \ |
2481 | .data = ipv4_devconf.data + \ | |
02291680 | 2482 | IPV4_DEVCONF_ ## attr - 1, \ |
42f811b8 HX |
2483 | .maxlen = sizeof(int), \ |
2484 | .mode = mval, \ | |
2485 | .proc_handler = proc, \ | |
31be3085 | 2486 | .extra1 = &ipv4_devconf, \ |
42f811b8 HX |
2487 | } |
2488 | ||
2489 | #define DEVINET_SYSCTL_RW_ENTRY(attr, name) \ | |
f8572d8f | 2490 | DEVINET_SYSCTL_ENTRY(attr, name, 0644, devinet_conf_proc) |
42f811b8 HX |
2491 | |
2492 | #define DEVINET_SYSCTL_RO_ENTRY(attr, name) \ | |
f8572d8f | 2493 | DEVINET_SYSCTL_ENTRY(attr, name, 0444, devinet_conf_proc) |
42f811b8 | 2494 | |
f8572d8f EB |
2495 | #define DEVINET_SYSCTL_COMPLEX_ENTRY(attr, name, proc) \ |
2496 | DEVINET_SYSCTL_ENTRY(attr, name, 0644, proc) | |
42f811b8 HX |
2497 | |
2498 | #define DEVINET_SYSCTL_FLUSHING_ENTRY(attr, name) \ | |
f8572d8f | 2499 | DEVINET_SYSCTL_COMPLEX_ENTRY(attr, name, ipv4_doint_and_flush) |
42f811b8 | 2500 | |
1da177e4 LT |
2501 | static struct devinet_sysctl_table { |
2502 | struct ctl_table_header *sysctl_header; | |
02291680 | 2503 | struct ctl_table devinet_vars[__IPV4_DEVCONF_MAX]; |
1da177e4 LT |
2504 | } devinet_sysctl = { |
2505 | .devinet_vars = { | |
42f811b8 | 2506 | DEVINET_SYSCTL_COMPLEX_ENTRY(FORWARDING, "forwarding", |
f8572d8f | 2507 | devinet_sysctl_forward), |
42f811b8 | 2508 | DEVINET_SYSCTL_RO_ENTRY(MC_FORWARDING, "mc_forwarding"), |
5cbf777c | 2509 | DEVINET_SYSCTL_RW_ENTRY(BC_FORWARDING, "bc_forwarding"), |
42f811b8 HX |
2510 | |
2511 | DEVINET_SYSCTL_RW_ENTRY(ACCEPT_REDIRECTS, "accept_redirects"), | |
2512 | DEVINET_SYSCTL_RW_ENTRY(SECURE_REDIRECTS, "secure_redirects"), | |
2513 | DEVINET_SYSCTL_RW_ENTRY(SHARED_MEDIA, "shared_media"), | |
2514 | DEVINET_SYSCTL_RW_ENTRY(RP_FILTER, "rp_filter"), | |
2515 | DEVINET_SYSCTL_RW_ENTRY(SEND_REDIRECTS, "send_redirects"), | |
2516 | DEVINET_SYSCTL_RW_ENTRY(ACCEPT_SOURCE_ROUTE, | |
2517 | "accept_source_route"), | |
8153a10c | 2518 | DEVINET_SYSCTL_RW_ENTRY(ACCEPT_LOCAL, "accept_local"), |
28f6aeea | 2519 | DEVINET_SYSCTL_RW_ENTRY(SRC_VMARK, "src_valid_mark"), |
42f811b8 HX |
2520 | DEVINET_SYSCTL_RW_ENTRY(PROXY_ARP, "proxy_arp"), |
2521 | DEVINET_SYSCTL_RW_ENTRY(MEDIUM_ID, "medium_id"), | |
2522 | DEVINET_SYSCTL_RW_ENTRY(BOOTP_RELAY, "bootp_relay"), | |
2523 | DEVINET_SYSCTL_RW_ENTRY(LOG_MARTIANS, "log_martians"), | |
2524 | DEVINET_SYSCTL_RW_ENTRY(TAG, "tag"), | |
2525 | DEVINET_SYSCTL_RW_ENTRY(ARPFILTER, "arp_filter"), | |
2526 | DEVINET_SYSCTL_RW_ENTRY(ARP_ANNOUNCE, "arp_announce"), | |
2527 | DEVINET_SYSCTL_RW_ENTRY(ARP_IGNORE, "arp_ignore"), | |
2528 | DEVINET_SYSCTL_RW_ENTRY(ARP_ACCEPT, "arp_accept"), | |
eefef1cf | 2529 | DEVINET_SYSCTL_RW_ENTRY(ARP_NOTIFY, "arp_notify"), |
65324144 | 2530 | DEVINET_SYSCTL_RW_ENTRY(PROXY_ARP_PVLAN, "proxy_arp_pvlan"), |
5c6fe01c WM |
2531 | DEVINET_SYSCTL_RW_ENTRY(FORCE_IGMP_VERSION, |
2532 | "force_igmp_version"), | |
2690048c WM |
2533 | DEVINET_SYSCTL_RW_ENTRY(IGMPV2_UNSOLICITED_REPORT_INTERVAL, |
2534 | "igmpv2_unsolicited_report_interval"), | |
2535 | DEVINET_SYSCTL_RW_ENTRY(IGMPV3_UNSOLICITED_REPORT_INTERVAL, | |
2536 | "igmpv3_unsolicited_report_interval"), | |
0eeb075f AG |
2537 | DEVINET_SYSCTL_RW_ENTRY(IGNORE_ROUTES_WITH_LINKDOWN, |
2538 | "ignore_routes_with_linkdown"), | |
97daf331 JB |
2539 | DEVINET_SYSCTL_RW_ENTRY(DROP_GRATUITOUS_ARP, |
2540 | "drop_gratuitous_arp"), | |
42f811b8 HX |
2541 | |
2542 | DEVINET_SYSCTL_FLUSHING_ENTRY(NOXFRM, "disable_xfrm"), | |
2543 | DEVINET_SYSCTL_FLUSHING_ENTRY(NOPOLICY, "disable_policy"), | |
42f811b8 HX |
2544 | DEVINET_SYSCTL_FLUSHING_ENTRY(PROMOTE_SECONDARIES, |
2545 | "promote_secondaries"), | |
d0daebc3 TG |
2546 | DEVINET_SYSCTL_FLUSHING_ENTRY(ROUTE_LOCALNET, |
2547 | "route_localnet"), | |
12b74dfa JB |
2548 | DEVINET_SYSCTL_FLUSHING_ENTRY(DROP_UNICAST_IN_L2_MULTICAST, |
2549 | "drop_unicast_in_l2_multicast"), | |
1da177e4 | 2550 | }, |
1da177e4 LT |
2551 | }; |
2552 | ||
ea40b324 | 2553 | static int __devinet_sysctl_register(struct net *net, char *dev_name, |
29c994e3 | 2554 | int ifindex, struct ipv4_devconf *p) |
1da177e4 LT |
2555 | { |
2556 | int i; | |
9fa89642 | 2557 | struct devinet_sysctl_table *t; |
8607ddb8 | 2558 | char path[sizeof("net/ipv4/conf/") + IFNAMSIZ]; |
bfada697 | 2559 | |
9fa89642 | 2560 | t = kmemdup(&devinet_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 | 2561 | if (!t) |
9fa89642 PE |
2562 | goto out; |
2563 | ||
1da177e4 LT |
2564 | for (i = 0; i < ARRAY_SIZE(t->devinet_vars) - 1; i++) { |
2565 | t->devinet_vars[i].data += (char *)p - (char *)&ipv4_devconf; | |
31be3085 | 2566 | t->devinet_vars[i].extra1 = p; |
c0ce9fb3 | 2567 | t->devinet_vars[i].extra2 = net; |
1da177e4 LT |
2568 | } |
2569 | ||
8607ddb8 | 2570 | snprintf(path, sizeof(path), "net/ipv4/conf/%s", dev_name); |
1da177e4 | 2571 | |
8607ddb8 | 2572 | t->sysctl_header = register_net_sysctl(net, path, t->devinet_vars); |
1da177e4 | 2573 | if (!t->sysctl_header) |
8607ddb8 | 2574 | goto free; |
1da177e4 LT |
2575 | |
2576 | p->sysctl = t; | |
29c994e3 | 2577 | |
3b022865 DA |
2578 | inet_netconf_notify_devconf(net, RTM_NEWNETCONF, NETCONFA_ALL, |
2579 | ifindex, p); | |
ea40b324 | 2580 | return 0; |
1da177e4 | 2581 | |
9fa89642 | 2582 | free: |
1da177e4 | 2583 | kfree(t); |
9fa89642 | 2584 | out: |
ea40b324 | 2585 | return -ENOBUFS; |
1da177e4 LT |
2586 | } |
2587 | ||
b5c9641d DA |
2588 | static void __devinet_sysctl_unregister(struct net *net, |
2589 | struct ipv4_devconf *cnf, int ifindex) | |
51602b2a PE |
2590 | { |
2591 | struct devinet_sysctl_table *t = cnf->sysctl; | |
2592 | ||
b5c9641d DA |
2593 | if (t) { |
2594 | cnf->sysctl = NULL; | |
2595 | unregister_net_sysctl_table(t->sysctl_header); | |
2596 | kfree(t); | |
2597 | } | |
51602b2a | 2598 | |
b5c9641d | 2599 | inet_netconf_notify_devconf(net, RTM_DELNETCONF, 0, ifindex, NULL); |
51602b2a PE |
2600 | } |
2601 | ||
20e61da7 | 2602 | static int devinet_sysctl_register(struct in_device *idev) |
66f27a52 | 2603 | { |
20e61da7 WC |
2604 | int err; |
2605 | ||
2606 | if (!sysctl_dev_name_is_allowed(idev->dev->name)) | |
2607 | return -EINVAL; | |
2608 | ||
2609 | err = neigh_sysctl_register(idev->dev, idev->arp_parms, NULL); | |
2610 | if (err) | |
2611 | return err; | |
2612 | err = __devinet_sysctl_register(dev_net(idev->dev), idev->dev->name, | |
29c994e3 | 2613 | idev->dev->ifindex, &idev->cnf); |
20e61da7 WC |
2614 | if (err) |
2615 | neigh_sysctl_unregister(idev->arp_parms); | |
2616 | return err; | |
66f27a52 PE |
2617 | } |
2618 | ||
51602b2a | 2619 | static void devinet_sysctl_unregister(struct in_device *idev) |
1da177e4 | 2620 | { |
b5c9641d DA |
2621 | struct net *net = dev_net(idev->dev); |
2622 | ||
2623 | __devinet_sysctl_unregister(net, &idev->cnf, idev->dev->ifindex); | |
51602b2a | 2624 | neigh_sysctl_unregister(idev->arp_parms); |
1da177e4 | 2625 | } |
1da177e4 | 2626 | |
68dd299b PE |
2627 | static struct ctl_table ctl_forward_entry[] = { |
2628 | { | |
68dd299b PE |
2629 | .procname = "ip_forward", |
2630 | .data = &ipv4_devconf.data[ | |
02291680 | 2631 | IPV4_DEVCONF_FORWARDING - 1], |
68dd299b PE |
2632 | .maxlen = sizeof(int), |
2633 | .mode = 0644, | |
2634 | .proc_handler = devinet_sysctl_forward, | |
68dd299b | 2635 | .extra1 = &ipv4_devconf, |
c0ce9fb3 | 2636 | .extra2 = &init_net, |
68dd299b PE |
2637 | }, |
2638 | { }, | |
2639 | }; | |
2a75de0c | 2640 | #endif |
68dd299b | 2641 | |
752d14dc PE |
2642 | static __net_init int devinet_init_net(struct net *net) |
2643 | { | |
2644 | int err; | |
752d14dc | 2645 | struct ipv4_devconf *all, *dflt; |
2a75de0c | 2646 | #ifdef CONFIG_SYSCTL |
856c395c | 2647 | struct ctl_table *tbl; |
752d14dc | 2648 | struct ctl_table_header *forw_hdr; |
2a75de0c | 2649 | #endif |
752d14dc PE |
2650 | |
2651 | err = -ENOMEM; | |
856c395c CW |
2652 | all = kmemdup(&ipv4_devconf, sizeof(ipv4_devconf), GFP_KERNEL); |
2653 | if (!all) | |
2654 | goto err_alloc_all; | |
752d14dc | 2655 | |
856c395c CW |
2656 | dflt = kmemdup(&ipv4_devconf_dflt, sizeof(ipv4_devconf_dflt), GFP_KERNEL); |
2657 | if (!dflt) | |
2658 | goto err_alloc_dflt; | |
752d14dc | 2659 | |
2a75de0c | 2660 | #ifdef CONFIG_SYSCTL |
856c395c CW |
2661 | tbl = kmemdup(ctl_forward_entry, sizeof(ctl_forward_entry), GFP_KERNEL); |
2662 | if (!tbl) | |
2663 | goto err_alloc_ctl; | |
752d14dc | 2664 | |
856c395c CW |
2665 | tbl[0].data = &all->data[IPV4_DEVCONF_FORWARDING - 1]; |
2666 | tbl[0].extra1 = all; | |
2667 | tbl[0].extra2 = net; | |
2a75de0c | 2668 | #endif |
856c395c | 2669 | |
9efd6a3c ND |
2670 | if (!net_eq(net, &init_net)) { |
2671 | if (IS_ENABLED(CONFIG_SYSCTL) && | |
2672 | sysctl_devconf_inherit_init_net == 3) { | |
2673 | /* copy from the current netns */ | |
2674 | memcpy(all, current->nsproxy->net_ns->ipv4.devconf_all, | |
2675 | sizeof(ipv4_devconf)); | |
2676 | memcpy(dflt, | |
2677 | current->nsproxy->net_ns->ipv4.devconf_dflt, | |
2678 | sizeof(ipv4_devconf_dflt)); | |
2679 | } else if (!IS_ENABLED(CONFIG_SYSCTL) || | |
2680 | sysctl_devconf_inherit_init_net != 2) { | |
2681 | /* inherit == 0 or 1: copy from init_net */ | |
2682 | memcpy(all, init_net.ipv4.devconf_all, | |
2683 | sizeof(ipv4_devconf)); | |
2684 | memcpy(dflt, init_net.ipv4.devconf_dflt, | |
2685 | sizeof(ipv4_devconf_dflt)); | |
2686 | } | |
2687 | /* else inherit == 2: use compiled values */ | |
752d14dc PE |
2688 | } |
2689 | ||
2690 | #ifdef CONFIG_SYSCTL | |
29c994e3 | 2691 | err = __devinet_sysctl_register(net, "all", NETCONFA_IFINDEX_ALL, all); |
752d14dc PE |
2692 | if (err < 0) |
2693 | goto err_reg_all; | |
2694 | ||
29c994e3 ND |
2695 | err = __devinet_sysctl_register(net, "default", |
2696 | NETCONFA_IFINDEX_DEFAULT, dflt); | |
752d14dc PE |
2697 | if (err < 0) |
2698 | goto err_reg_dflt; | |
2699 | ||
2700 | err = -ENOMEM; | |
8607ddb8 | 2701 | forw_hdr = register_net_sysctl(net, "net/ipv4", tbl); |
51456b29 | 2702 | if (!forw_hdr) |
752d14dc | 2703 | goto err_reg_ctl; |
2a75de0c | 2704 | net->ipv4.forw_hdr = forw_hdr; |
752d14dc PE |
2705 | #endif |
2706 | ||
752d14dc PE |
2707 | net->ipv4.devconf_all = all; |
2708 | net->ipv4.devconf_dflt = dflt; | |
2709 | return 0; | |
2710 | ||
2711 | #ifdef CONFIG_SYSCTL | |
2712 | err_reg_ctl: | |
b5c9641d | 2713 | __devinet_sysctl_unregister(net, dflt, NETCONFA_IFINDEX_DEFAULT); |
752d14dc | 2714 | err_reg_dflt: |
b5c9641d | 2715 | __devinet_sysctl_unregister(net, all, NETCONFA_IFINDEX_ALL); |
752d14dc | 2716 | err_reg_all: |
856c395c | 2717 | kfree(tbl); |
752d14dc | 2718 | err_alloc_ctl: |
2a75de0c | 2719 | #endif |
856c395c | 2720 | kfree(dflt); |
752d14dc | 2721 | err_alloc_dflt: |
856c395c | 2722 | kfree(all); |
752d14dc PE |
2723 | err_alloc_all: |
2724 | return err; | |
2725 | } | |
2726 | ||
2727 | static __net_exit void devinet_exit_net(struct net *net) | |
2728 | { | |
2a75de0c | 2729 | #ifdef CONFIG_SYSCTL |
752d14dc PE |
2730 | struct ctl_table *tbl; |
2731 | ||
2732 | tbl = net->ipv4.forw_hdr->ctl_table_arg; | |
752d14dc | 2733 | unregister_net_sysctl_table(net->ipv4.forw_hdr); |
b5c9641d DA |
2734 | __devinet_sysctl_unregister(net, net->ipv4.devconf_dflt, |
2735 | NETCONFA_IFINDEX_DEFAULT); | |
2736 | __devinet_sysctl_unregister(net, net->ipv4.devconf_all, | |
2737 | NETCONFA_IFINDEX_ALL); | |
752d14dc | 2738 | kfree(tbl); |
2a75de0c | 2739 | #endif |
752d14dc PE |
2740 | kfree(net->ipv4.devconf_dflt); |
2741 | kfree(net->ipv4.devconf_all); | |
2742 | } | |
2743 | ||
2744 | static __net_initdata struct pernet_operations devinet_ops = { | |
2745 | .init = devinet_init_net, | |
2746 | .exit = devinet_exit_net, | |
2747 | }; | |
2748 | ||
207895fd | 2749 | static struct rtnl_af_ops inet_af_ops __read_mostly = { |
9f0f7272 TG |
2750 | .family = AF_INET, |
2751 | .fill_link_af = inet_fill_link_af, | |
2752 | .get_link_af_size = inet_get_link_af_size, | |
cf7afbfe TG |
2753 | .validate_link_af = inet_validate_link_af, |
2754 | .set_link_af = inet_set_link_af, | |
9f0f7272 TG |
2755 | }; |
2756 | ||
1da177e4 LT |
2757 | void __init devinet_init(void) |
2758 | { | |
fd23c3b3 DM |
2759 | int i; |
2760 | ||
2761 | for (i = 0; i < IN4_ADDR_HSIZE; i++) | |
2762 | INIT_HLIST_HEAD(&inet_addr_lst[i]); | |
2763 | ||
752d14dc PE |
2764 | register_pernet_subsys(&devinet_ops); |
2765 | ||
1da177e4 LT |
2766 | register_gifconf(PF_INET, inet_gifconf); |
2767 | register_netdevice_notifier(&ip_netdev_notifier); | |
63f3444f | 2768 | |
906e073f | 2769 | queue_delayed_work(system_power_efficient_wq, &check_lifetime_work, 0); |
5c766d64 | 2770 | |
9f0f7272 TG |
2771 | rtnl_af_register(&inet_af_ops); |
2772 | ||
b97bac64 FW |
2773 | rtnl_register(PF_INET, RTM_NEWADDR, inet_rtm_newaddr, NULL, 0); |
2774 | rtnl_register(PF_INET, RTM_DELADDR, inet_rtm_deladdr, NULL, 0); | |
2775 | rtnl_register(PF_INET, RTM_GETADDR, NULL, inet_dump_ifaddr, 0); | |
9e551110 | 2776 | rtnl_register(PF_INET, RTM_GETNETCONF, inet_netconf_get_devconf, |
b97bac64 | 2777 | inet_netconf_dump_devconf, 0); |
1da177e4 | 2778 | } |