Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * NET3 IP device support routines. |
| 3 | * |
| 4 | * Version: $Id: devinet.c,v 1.44 2001/10/31 21:55:54 davem Exp $ |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * Derived from the IP parts of dev.c 1.0.19 |
Jesper Juhl | 02c30a8 | 2005-05-05 16:16:16 -0700 | [diff] [blame] | 12 | * Authors: Ross Biro |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
| 14 | * Mark Evans, <evansmp@uhura.aston.ac.uk> |
| 15 | * |
| 16 | * Additional Authors: |
| 17 | * Alan Cox, <gw4pts@gw4pts.ampr.org> |
| 18 | * Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
| 19 | * |
| 20 | * Changes: |
| 21 | * Alexey Kuznetsov: pa_* fields are replaced with ifaddr |
| 22 | * lists. |
| 23 | * Cyrus Durgin: updated for kmod |
| 24 | * Matthias Andree: in devinet_ioctl, compare label and |
| 25 | * address (4.4BSD alias style support), |
| 26 | * fall back to comparing just the label |
| 27 | * if no match found. |
| 28 | */ |
| 29 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | |
| 31 | #include <asm/uaccess.h> |
| 32 | #include <asm/system.h> |
| 33 | #include <linux/bitops.h> |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 34 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/module.h> |
| 36 | #include <linux/types.h> |
| 37 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <linux/string.h> |
| 39 | #include <linux/mm.h> |
| 40 | #include <linux/socket.h> |
| 41 | #include <linux/sockios.h> |
| 42 | #include <linux/in.h> |
| 43 | #include <linux/errno.h> |
| 44 | #include <linux/interrupt.h> |
Thomas Graf | 1823730 | 2006-08-04 23:04:54 -0700 | [diff] [blame] | 45 | #include <linux/if_addr.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #include <linux/if_ether.h> |
| 47 | #include <linux/inet.h> |
| 48 | #include <linux/netdevice.h> |
| 49 | #include <linux/etherdevice.h> |
| 50 | #include <linux/skbuff.h> |
| 51 | #include <linux/rtnetlink.h> |
| 52 | #include <linux/init.h> |
| 53 | #include <linux/notifier.h> |
| 54 | #include <linux/inetdevice.h> |
| 55 | #include <linux/igmp.h> |
| 56 | #ifdef CONFIG_SYSCTL |
| 57 | #include <linux/sysctl.h> |
| 58 | #endif |
| 59 | #include <linux/kmod.h> |
| 60 | |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 61 | #include <net/arp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | #include <net/ip.h> |
| 63 | #include <net/route.h> |
| 64 | #include <net/ip_fib.h> |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 65 | #include <net/netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | |
| 67 | struct ipv4_devconf ipv4_devconf = { |
| 68 | .accept_redirects = 1, |
| 69 | .send_redirects = 1, |
| 70 | .secure_redirects = 1, |
| 71 | .shared_media = 1, |
| 72 | }; |
| 73 | |
| 74 | static struct ipv4_devconf ipv4_devconf_dflt = { |
| 75 | .accept_redirects = 1, |
| 76 | .send_redirects = 1, |
| 77 | .secure_redirects = 1, |
| 78 | .shared_media = 1, |
| 79 | .accept_source_route = 1, |
| 80 | }; |
| 81 | |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 82 | static struct nla_policy ifa_ipv4_policy[IFA_MAX+1] __read_mostly = { |
| 83 | [IFA_LOCAL] = { .type = NLA_U32 }, |
| 84 | [IFA_ADDRESS] = { .type = NLA_U32 }, |
| 85 | [IFA_BROADCAST] = { .type = NLA_U32 }, |
| 86 | [IFA_ANYCAST] = { .type = NLA_U32 }, |
Thomas Graf | 5176f91 | 2006-08-26 20:13:18 -0700 | [diff] [blame] | 87 | [IFA_LABEL] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 88 | }; |
| 89 | |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 90 | static void rtmsg_ifa(int event, struct in_ifaddr *, struct nlmsghdr *, u32); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 92 | static BLOCKING_NOTIFIER_HEAD(inetaddr_chain); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, |
| 94 | int destroy); |
| 95 | #ifdef CONFIG_SYSCTL |
| 96 | static void devinet_sysctl_register(struct in_device *in_dev, |
| 97 | struct ipv4_devconf *p); |
| 98 | static void devinet_sysctl_unregister(struct ipv4_devconf *p); |
| 99 | #endif |
| 100 | |
| 101 | /* Locks all the inet devices. */ |
| 102 | |
| 103 | static struct in_ifaddr *inet_alloc_ifa(void) |
| 104 | { |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 105 | struct in_ifaddr *ifa = kzalloc(sizeof(*ifa), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | |
| 107 | if (ifa) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | INIT_RCU_HEAD(&ifa->rcu_head); |
| 109 | } |
| 110 | |
| 111 | return ifa; |
| 112 | } |
| 113 | |
| 114 | static void inet_rcu_free_ifa(struct rcu_head *head) |
| 115 | { |
| 116 | struct in_ifaddr *ifa = container_of(head, struct in_ifaddr, rcu_head); |
| 117 | if (ifa->ifa_dev) |
| 118 | in_dev_put(ifa->ifa_dev); |
| 119 | kfree(ifa); |
| 120 | } |
| 121 | |
| 122 | static inline void inet_free_ifa(struct in_ifaddr *ifa) |
| 123 | { |
| 124 | call_rcu(&ifa->rcu_head, inet_rcu_free_ifa); |
| 125 | } |
| 126 | |
| 127 | void in_dev_finish_destroy(struct in_device *idev) |
| 128 | { |
| 129 | struct net_device *dev = idev->dev; |
| 130 | |
| 131 | BUG_TRAP(!idev->ifa_list); |
| 132 | BUG_TRAP(!idev->mc_list); |
| 133 | #ifdef NET_REFCNT_DEBUG |
| 134 | printk(KERN_DEBUG "in_dev_finish_destroy: %p=%s\n", |
| 135 | idev, dev ? dev->name : "NIL"); |
| 136 | #endif |
| 137 | dev_put(dev); |
| 138 | if (!idev->dead) |
| 139 | printk("Freeing alive in_device %p\n", idev); |
| 140 | else { |
| 141 | kfree(idev); |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | struct in_device *inetdev_init(struct net_device *dev) |
| 146 | { |
| 147 | struct in_device *in_dev; |
| 148 | |
| 149 | ASSERT_RTNL(); |
| 150 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 151 | in_dev = kzalloc(sizeof(*in_dev), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | if (!in_dev) |
| 153 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | INIT_RCU_HEAD(&in_dev->rcu_head); |
| 155 | memcpy(&in_dev->cnf, &ipv4_devconf_dflt, sizeof(in_dev->cnf)); |
| 156 | in_dev->cnf.sysctl = NULL; |
| 157 | in_dev->dev = dev; |
| 158 | if ((in_dev->arp_parms = neigh_parms_alloc(dev, &arp_tbl)) == NULL) |
| 159 | goto out_kfree; |
| 160 | /* Reference in_dev->dev */ |
| 161 | dev_hold(dev); |
| 162 | #ifdef CONFIG_SYSCTL |
| 163 | neigh_sysctl_register(dev, in_dev->arp_parms, NET_IPV4, |
| 164 | NET_IPV4_NEIGH, "ipv4", NULL, NULL); |
| 165 | #endif |
| 166 | |
David L Stevens | 30c4cf5 | 2007-01-04 12:31:14 -0800 | [diff] [blame] | 167 | /* Account for reference dev->ip_ptr (below) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | in_dev_hold(in_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | |
| 170 | #ifdef CONFIG_SYSCTL |
| 171 | devinet_sysctl_register(in_dev, &in_dev->cnf); |
| 172 | #endif |
| 173 | ip_mc_init_dev(in_dev); |
| 174 | if (dev->flags & IFF_UP) |
| 175 | ip_mc_up(in_dev); |
Jarek Poplawski | 483479e | 2007-01-09 14:38:31 -0800 | [diff] [blame] | 176 | |
David L Stevens | 30c4cf5 | 2007-01-04 12:31:14 -0800 | [diff] [blame] | 177 | /* we can receive as soon as ip_ptr is set -- do this last */ |
| 178 | rcu_assign_pointer(dev->ip_ptr, in_dev); |
Jarek Poplawski | 483479e | 2007-01-09 14:38:31 -0800 | [diff] [blame] | 179 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | return in_dev; |
| 181 | out_kfree: |
| 182 | kfree(in_dev); |
| 183 | in_dev = NULL; |
| 184 | goto out; |
| 185 | } |
| 186 | |
| 187 | static void in_dev_rcu_put(struct rcu_head *head) |
| 188 | { |
| 189 | struct in_device *idev = container_of(head, struct in_device, rcu_head); |
| 190 | in_dev_put(idev); |
| 191 | } |
| 192 | |
| 193 | static void inetdev_destroy(struct in_device *in_dev) |
| 194 | { |
| 195 | struct in_ifaddr *ifa; |
| 196 | struct net_device *dev; |
| 197 | |
| 198 | ASSERT_RTNL(); |
| 199 | |
| 200 | dev = in_dev->dev; |
| 201 | if (dev == &loopback_dev) |
| 202 | return; |
| 203 | |
| 204 | in_dev->dead = 1; |
| 205 | |
| 206 | ip_mc_destroy_dev(in_dev); |
| 207 | |
| 208 | while ((ifa = in_dev->ifa_list) != NULL) { |
| 209 | inet_del_ifa(in_dev, &in_dev->ifa_list, 0); |
| 210 | inet_free_ifa(ifa); |
| 211 | } |
| 212 | |
| 213 | #ifdef CONFIG_SYSCTL |
| 214 | devinet_sysctl_unregister(&in_dev->cnf); |
| 215 | #endif |
| 216 | |
| 217 | dev->ip_ptr = NULL; |
| 218 | |
| 219 | #ifdef CONFIG_SYSCTL |
| 220 | neigh_sysctl_unregister(in_dev->arp_parms); |
| 221 | #endif |
| 222 | neigh_parms_release(&arp_tbl, in_dev->arp_parms); |
| 223 | arp_ifdown(dev); |
| 224 | |
| 225 | call_rcu(&in_dev->rcu_head, in_dev_rcu_put); |
| 226 | } |
| 227 | |
Al Viro | ff428d7 | 2006-09-26 22:13:35 -0700 | [diff] [blame] | 228 | int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | { |
| 230 | rcu_read_lock(); |
| 231 | for_primary_ifa(in_dev) { |
| 232 | if (inet_ifa_match(a, ifa)) { |
| 233 | if (!b || inet_ifa_match(b, ifa)) { |
| 234 | rcu_read_unlock(); |
| 235 | return 1; |
| 236 | } |
| 237 | } |
| 238 | } endfor_ifa(in_dev); |
| 239 | rcu_read_unlock(); |
| 240 | return 0; |
| 241 | } |
| 242 | |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 243 | static void __inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, |
| 244 | int destroy, struct nlmsghdr *nlh, u32 pid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | { |
Harald Welte | 8f937c6 | 2005-05-29 20:23:46 -0700 | [diff] [blame] | 246 | struct in_ifaddr *promote = NULL; |
Jamal Hadi Salim | 0ff60a4 | 2005-11-22 14:47:37 -0800 | [diff] [blame] | 247 | struct in_ifaddr *ifa, *ifa1 = *ifap; |
| 248 | struct in_ifaddr *last_prim = in_dev->ifa_list; |
| 249 | struct in_ifaddr *prev_prom = NULL; |
| 250 | int do_promote = IN_DEV_PROMOTE_SECONDARIES(in_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | |
| 252 | ASSERT_RTNL(); |
| 253 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 254 | /* 1. Deleting primary ifaddr forces deletion all secondaries |
Harald Welte | 8f937c6 | 2005-05-29 20:23:46 -0700 | [diff] [blame] | 255 | * unless alias promotion is set |
| 256 | **/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | |
| 258 | if (!(ifa1->ifa_flags & IFA_F_SECONDARY)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | struct in_ifaddr **ifap1 = &ifa1->ifa_next; |
| 260 | |
| 261 | while ((ifa = *ifap1) != NULL) { |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 262 | if (!(ifa->ifa_flags & IFA_F_SECONDARY) && |
Jamal Hadi Salim | 0ff60a4 | 2005-11-22 14:47:37 -0800 | [diff] [blame] | 263 | ifa1->ifa_scope <= ifa->ifa_scope) |
| 264 | last_prim = ifa; |
| 265 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | if (!(ifa->ifa_flags & IFA_F_SECONDARY) || |
| 267 | ifa1->ifa_mask != ifa->ifa_mask || |
| 268 | !inet_ifa_match(ifa1->ifa_address, ifa)) { |
| 269 | ifap1 = &ifa->ifa_next; |
Jamal Hadi Salim | 0ff60a4 | 2005-11-22 14:47:37 -0800 | [diff] [blame] | 270 | prev_prom = ifa; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | continue; |
| 272 | } |
| 273 | |
Jamal Hadi Salim | 0ff60a4 | 2005-11-22 14:47:37 -0800 | [diff] [blame] | 274 | if (!do_promote) { |
Harald Welte | 8f937c6 | 2005-05-29 20:23:46 -0700 | [diff] [blame] | 275 | *ifap1 = ifa->ifa_next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 277 | rtmsg_ifa(RTM_DELADDR, ifa, nlh, pid); |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 278 | blocking_notifier_call_chain(&inetaddr_chain, |
| 279 | NETDEV_DOWN, ifa); |
Harald Welte | 8f937c6 | 2005-05-29 20:23:46 -0700 | [diff] [blame] | 280 | inet_free_ifa(ifa); |
| 281 | } else { |
| 282 | promote = ifa; |
| 283 | break; |
| 284 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | } |
| 286 | } |
| 287 | |
| 288 | /* 2. Unlink it */ |
| 289 | |
| 290 | *ifap = ifa1->ifa_next; |
| 291 | |
| 292 | /* 3. Announce address deletion */ |
| 293 | |
| 294 | /* Send message first, then call notifier. |
| 295 | At first sight, FIB update triggered by notifier |
| 296 | will refer to already deleted ifaddr, that could confuse |
| 297 | netlink listeners. It is not true: look, gated sees |
| 298 | that route deleted and if it still thinks that ifaddr |
| 299 | is valid, it will try to restore deleted routes... Grr. |
| 300 | So that, this order is correct. |
| 301 | */ |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 302 | rtmsg_ifa(RTM_DELADDR, ifa1, nlh, pid); |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 303 | blocking_notifier_call_chain(&inetaddr_chain, NETDEV_DOWN, ifa1); |
Jamal Hadi Salim | 0ff60a4 | 2005-11-22 14:47:37 -0800 | [diff] [blame] | 304 | |
| 305 | if (promote) { |
| 306 | |
| 307 | if (prev_prom) { |
| 308 | prev_prom->ifa_next = promote->ifa_next; |
| 309 | promote->ifa_next = last_prim->ifa_next; |
| 310 | last_prim->ifa_next = promote; |
| 311 | } |
| 312 | |
| 313 | promote->ifa_flags &= ~IFA_F_SECONDARY; |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 314 | rtmsg_ifa(RTM_NEWADDR, promote, nlh, pid); |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 315 | blocking_notifier_call_chain(&inetaddr_chain, |
| 316 | NETDEV_UP, promote); |
Jamal Hadi Salim | 0ff60a4 | 2005-11-22 14:47:37 -0800 | [diff] [blame] | 317 | for (ifa = promote->ifa_next; ifa; ifa = ifa->ifa_next) { |
| 318 | if (ifa1->ifa_mask != ifa->ifa_mask || |
| 319 | !inet_ifa_match(ifa1->ifa_address, ifa)) |
| 320 | continue; |
| 321 | fib_add_ifaddr(ifa); |
| 322 | } |
| 323 | |
| 324 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | if (destroy) { |
| 326 | inet_free_ifa(ifa1); |
| 327 | |
| 328 | if (!in_dev->ifa_list) |
| 329 | inetdev_destroy(in_dev); |
| 330 | } |
| 331 | } |
| 332 | |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 333 | static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, |
| 334 | int destroy) |
| 335 | { |
| 336 | __inet_del_ifa(in_dev, ifap, destroy, NULL, 0); |
| 337 | } |
| 338 | |
| 339 | static int __inet_insert_ifa(struct in_ifaddr *ifa, struct nlmsghdr *nlh, |
| 340 | u32 pid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | { |
| 342 | struct in_device *in_dev = ifa->ifa_dev; |
| 343 | struct in_ifaddr *ifa1, **ifap, **last_primary; |
| 344 | |
| 345 | ASSERT_RTNL(); |
| 346 | |
| 347 | if (!ifa->ifa_local) { |
| 348 | inet_free_ifa(ifa); |
| 349 | return 0; |
| 350 | } |
| 351 | |
| 352 | ifa->ifa_flags &= ~IFA_F_SECONDARY; |
| 353 | last_primary = &in_dev->ifa_list; |
| 354 | |
| 355 | for (ifap = &in_dev->ifa_list; (ifa1 = *ifap) != NULL; |
| 356 | ifap = &ifa1->ifa_next) { |
| 357 | if (!(ifa1->ifa_flags & IFA_F_SECONDARY) && |
| 358 | ifa->ifa_scope <= ifa1->ifa_scope) |
| 359 | last_primary = &ifa1->ifa_next; |
| 360 | if (ifa1->ifa_mask == ifa->ifa_mask && |
| 361 | inet_ifa_match(ifa1->ifa_address, ifa)) { |
| 362 | if (ifa1->ifa_local == ifa->ifa_local) { |
| 363 | inet_free_ifa(ifa); |
| 364 | return -EEXIST; |
| 365 | } |
| 366 | if (ifa1->ifa_scope != ifa->ifa_scope) { |
| 367 | inet_free_ifa(ifa); |
| 368 | return -EINVAL; |
| 369 | } |
| 370 | ifa->ifa_flags |= IFA_F_SECONDARY; |
| 371 | } |
| 372 | } |
| 373 | |
| 374 | if (!(ifa->ifa_flags & IFA_F_SECONDARY)) { |
| 375 | net_srandom(ifa->ifa_local); |
| 376 | ifap = last_primary; |
| 377 | } |
| 378 | |
| 379 | ifa->ifa_next = *ifap; |
| 380 | *ifap = ifa; |
| 381 | |
| 382 | /* Send message first, then call notifier. |
| 383 | Notifier will trigger FIB update, so that |
| 384 | listeners of netlink will know about new ifaddr */ |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 385 | rtmsg_ifa(RTM_NEWADDR, ifa, nlh, pid); |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 386 | blocking_notifier_call_chain(&inetaddr_chain, NETDEV_UP, ifa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | |
| 388 | return 0; |
| 389 | } |
| 390 | |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 391 | static int inet_insert_ifa(struct in_ifaddr *ifa) |
| 392 | { |
| 393 | return __inet_insert_ifa(ifa, NULL, 0); |
| 394 | } |
| 395 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | static int inet_set_ifa(struct net_device *dev, struct in_ifaddr *ifa) |
| 397 | { |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 398 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | |
| 400 | ASSERT_RTNL(); |
| 401 | |
| 402 | if (!in_dev) { |
| 403 | in_dev = inetdev_init(dev); |
| 404 | if (!in_dev) { |
| 405 | inet_free_ifa(ifa); |
| 406 | return -ENOBUFS; |
| 407 | } |
| 408 | } |
| 409 | if (ifa->ifa_dev != in_dev) { |
| 410 | BUG_TRAP(!ifa->ifa_dev); |
| 411 | in_dev_hold(in_dev); |
| 412 | ifa->ifa_dev = in_dev; |
| 413 | } |
| 414 | if (LOOPBACK(ifa->ifa_local)) |
| 415 | ifa->ifa_scope = RT_SCOPE_HOST; |
| 416 | return inet_insert_ifa(ifa); |
| 417 | } |
| 418 | |
| 419 | struct in_device *inetdev_by_index(int ifindex) |
| 420 | { |
| 421 | struct net_device *dev; |
| 422 | struct in_device *in_dev = NULL; |
| 423 | read_lock(&dev_base_lock); |
| 424 | dev = __dev_get_by_index(ifindex); |
| 425 | if (dev) |
| 426 | in_dev = in_dev_get(dev); |
| 427 | read_unlock(&dev_base_lock); |
| 428 | return in_dev; |
| 429 | } |
| 430 | |
| 431 | /* Called only from RTNL semaphored context. No locks. */ |
| 432 | |
Al Viro | 60cad5d | 2006-09-26 22:17:09 -0700 | [diff] [blame] | 433 | struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, |
| 434 | __be32 mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | { |
| 436 | ASSERT_RTNL(); |
| 437 | |
| 438 | for_primary_ifa(in_dev) { |
| 439 | if (ifa->ifa_mask == mask && inet_ifa_match(prefix, ifa)) |
| 440 | return ifa; |
| 441 | } endfor_ifa(in_dev); |
| 442 | return NULL; |
| 443 | } |
| 444 | |
| 445 | static int inet_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
| 446 | { |
Thomas Graf | dfdd5fd | 2006-08-04 23:04:17 -0700 | [diff] [blame] | 447 | struct nlattr *tb[IFA_MAX+1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | struct in_device *in_dev; |
Thomas Graf | dfdd5fd | 2006-08-04 23:04:17 -0700 | [diff] [blame] | 449 | struct ifaddrmsg *ifm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | struct in_ifaddr *ifa, **ifap; |
Thomas Graf | dfdd5fd | 2006-08-04 23:04:17 -0700 | [diff] [blame] | 451 | int err = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | |
| 453 | ASSERT_RTNL(); |
| 454 | |
Thomas Graf | dfdd5fd | 2006-08-04 23:04:17 -0700 | [diff] [blame] | 455 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv4_policy); |
| 456 | if (err < 0) |
| 457 | goto errout; |
| 458 | |
| 459 | ifm = nlmsg_data(nlh); |
| 460 | in_dev = inetdev_by_index(ifm->ifa_index); |
| 461 | if (in_dev == NULL) { |
| 462 | err = -ENODEV; |
| 463 | goto errout; |
| 464 | } |
| 465 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | __in_dev_put(in_dev); |
| 467 | |
| 468 | for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL; |
| 469 | ifap = &ifa->ifa_next) { |
Thomas Graf | dfdd5fd | 2006-08-04 23:04:17 -0700 | [diff] [blame] | 470 | if (tb[IFA_LOCAL] && |
Al Viro | a7a628c | 2006-09-26 22:16:43 -0700 | [diff] [blame] | 471 | ifa->ifa_local != nla_get_be32(tb[IFA_LOCAL])) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | continue; |
Thomas Graf | dfdd5fd | 2006-08-04 23:04:17 -0700 | [diff] [blame] | 473 | |
| 474 | if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label)) |
| 475 | continue; |
| 476 | |
| 477 | if (tb[IFA_ADDRESS] && |
| 478 | (ifm->ifa_prefixlen != ifa->ifa_prefixlen || |
Al Viro | a7a628c | 2006-09-26 22:16:43 -0700 | [diff] [blame] | 479 | !inet_ifa_match(nla_get_be32(tb[IFA_ADDRESS]), ifa))) |
Thomas Graf | dfdd5fd | 2006-08-04 23:04:17 -0700 | [diff] [blame] | 480 | continue; |
| 481 | |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 482 | __inet_del_ifa(in_dev, ifap, 1, nlh, NETLINK_CB(skb).pid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | return 0; |
| 484 | } |
Thomas Graf | dfdd5fd | 2006-08-04 23:04:17 -0700 | [diff] [blame] | 485 | |
| 486 | err = -EADDRNOTAVAIL; |
| 487 | errout: |
| 488 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | } |
| 490 | |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 491 | static struct in_ifaddr *rtm_to_ifaddr(struct nlmsghdr *nlh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | { |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 493 | struct nlattr *tb[IFA_MAX+1]; |
| 494 | struct in_ifaddr *ifa; |
| 495 | struct ifaddrmsg *ifm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | struct net_device *dev; |
| 497 | struct in_device *in_dev; |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 498 | int err = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 500 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv4_policy); |
| 501 | if (err < 0) |
| 502 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 504 | ifm = nlmsg_data(nlh); |
| 505 | if (ifm->ifa_prefixlen > 32 || tb[IFA_LOCAL] == NULL) |
| 506 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 508 | dev = __dev_get_by_index(ifm->ifa_index); |
| 509 | if (dev == NULL) { |
| 510 | err = -ENODEV; |
| 511 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | } |
| 513 | |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 514 | in_dev = __in_dev_get_rtnl(dev); |
| 515 | if (in_dev == NULL) { |
| 516 | in_dev = inetdev_init(dev); |
| 517 | if (in_dev == NULL) { |
| 518 | err = -ENOBUFS; |
| 519 | goto errout; |
| 520 | } |
| 521 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 523 | ifa = inet_alloc_ifa(); |
| 524 | if (ifa == NULL) { |
| 525 | /* |
| 526 | * A potential indev allocation can be left alive, it stays |
| 527 | * assigned to its device and is destroy with it. |
| 528 | */ |
| 529 | err = -ENOBUFS; |
| 530 | goto errout; |
| 531 | } |
| 532 | |
| 533 | in_dev_hold(in_dev); |
| 534 | |
| 535 | if (tb[IFA_ADDRESS] == NULL) |
| 536 | tb[IFA_ADDRESS] = tb[IFA_LOCAL]; |
| 537 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | ifa->ifa_prefixlen = ifm->ifa_prefixlen; |
| 539 | ifa->ifa_mask = inet_make_mask(ifm->ifa_prefixlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | ifa->ifa_flags = ifm->ifa_flags; |
| 541 | ifa->ifa_scope = ifm->ifa_scope; |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 542 | ifa->ifa_dev = in_dev; |
| 543 | |
Al Viro | a7a628c | 2006-09-26 22:16:43 -0700 | [diff] [blame] | 544 | ifa->ifa_local = nla_get_be32(tb[IFA_LOCAL]); |
| 545 | ifa->ifa_address = nla_get_be32(tb[IFA_ADDRESS]); |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 546 | |
| 547 | if (tb[IFA_BROADCAST]) |
Al Viro | a7a628c | 2006-09-26 22:16:43 -0700 | [diff] [blame] | 548 | ifa->ifa_broadcast = nla_get_be32(tb[IFA_BROADCAST]); |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 549 | |
| 550 | if (tb[IFA_ANYCAST]) |
Al Viro | a7a628c | 2006-09-26 22:16:43 -0700 | [diff] [blame] | 551 | ifa->ifa_anycast = nla_get_be32(tb[IFA_ANYCAST]); |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 552 | |
| 553 | if (tb[IFA_LABEL]) |
| 554 | nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | else |
| 556 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
| 557 | |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 558 | return ifa; |
| 559 | |
| 560 | errout: |
| 561 | return ERR_PTR(err); |
| 562 | } |
| 563 | |
| 564 | static int inet_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
| 565 | { |
| 566 | struct in_ifaddr *ifa; |
| 567 | |
| 568 | ASSERT_RTNL(); |
| 569 | |
| 570 | ifa = rtm_to_ifaddr(nlh); |
| 571 | if (IS_ERR(ifa)) |
| 572 | return PTR_ERR(ifa); |
| 573 | |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 574 | return __inet_insert_ifa(ifa, nlh, NETLINK_CB(skb).pid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | } |
| 576 | |
| 577 | /* |
| 578 | * Determine a default network mask, based on the IP address. |
| 579 | */ |
| 580 | |
Al Viro | 714e85b | 2006-11-14 20:51:49 -0800 | [diff] [blame] | 581 | static __inline__ int inet_abc_len(__be32 addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | { |
| 583 | int rc = -1; /* Something else, probably a multicast. */ |
| 584 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 585 | if (ZERONET(addr)) |
| 586 | rc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | else { |
Al Viro | 714e85b | 2006-11-14 20:51:49 -0800 | [diff] [blame] | 588 | __u32 haddr = ntohl(addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | |
Al Viro | 714e85b | 2006-11-14 20:51:49 -0800 | [diff] [blame] | 590 | if (IN_CLASSA(haddr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | rc = 8; |
Al Viro | 714e85b | 2006-11-14 20:51:49 -0800 | [diff] [blame] | 592 | else if (IN_CLASSB(haddr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | rc = 16; |
Al Viro | 714e85b | 2006-11-14 20:51:49 -0800 | [diff] [blame] | 594 | else if (IN_CLASSC(haddr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | rc = 24; |
| 596 | } |
| 597 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 598 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | } |
| 600 | |
| 601 | |
| 602 | int devinet_ioctl(unsigned int cmd, void __user *arg) |
| 603 | { |
| 604 | struct ifreq ifr; |
| 605 | struct sockaddr_in sin_orig; |
| 606 | struct sockaddr_in *sin = (struct sockaddr_in *)&ifr.ifr_addr; |
| 607 | struct in_device *in_dev; |
| 608 | struct in_ifaddr **ifap = NULL; |
| 609 | struct in_ifaddr *ifa = NULL; |
| 610 | struct net_device *dev; |
| 611 | char *colon; |
| 612 | int ret = -EFAULT; |
| 613 | int tryaddrmatch = 0; |
| 614 | |
| 615 | /* |
| 616 | * Fetch the caller's info block into kernel space |
| 617 | */ |
| 618 | |
| 619 | if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) |
| 620 | goto out; |
| 621 | ifr.ifr_name[IFNAMSIZ - 1] = 0; |
| 622 | |
| 623 | /* save original address for comparison */ |
| 624 | memcpy(&sin_orig, sin, sizeof(*sin)); |
| 625 | |
| 626 | colon = strchr(ifr.ifr_name, ':'); |
| 627 | if (colon) |
| 628 | *colon = 0; |
| 629 | |
| 630 | #ifdef CONFIG_KMOD |
| 631 | dev_load(ifr.ifr_name); |
| 632 | #endif |
| 633 | |
| 634 | switch(cmd) { |
| 635 | case SIOCGIFADDR: /* Get interface address */ |
| 636 | case SIOCGIFBRDADDR: /* Get the broadcast address */ |
| 637 | case SIOCGIFDSTADDR: /* Get the destination address */ |
| 638 | case SIOCGIFNETMASK: /* Get the netmask for the interface */ |
| 639 | /* Note that these ioctls will not sleep, |
| 640 | so that we do not impose a lock. |
| 641 | One day we will be forced to put shlock here (I mean SMP) |
| 642 | */ |
| 643 | tryaddrmatch = (sin_orig.sin_family == AF_INET); |
| 644 | memset(sin, 0, sizeof(*sin)); |
| 645 | sin->sin_family = AF_INET; |
| 646 | break; |
| 647 | |
| 648 | case SIOCSIFFLAGS: |
| 649 | ret = -EACCES; |
| 650 | if (!capable(CAP_NET_ADMIN)) |
| 651 | goto out; |
| 652 | break; |
| 653 | case SIOCSIFADDR: /* Set interface address (and family) */ |
| 654 | case SIOCSIFBRDADDR: /* Set the broadcast address */ |
| 655 | case SIOCSIFDSTADDR: /* Set the destination address */ |
| 656 | case SIOCSIFNETMASK: /* Set the netmask for the interface */ |
| 657 | ret = -EACCES; |
| 658 | if (!capable(CAP_NET_ADMIN)) |
| 659 | goto out; |
| 660 | ret = -EINVAL; |
| 661 | if (sin->sin_family != AF_INET) |
| 662 | goto out; |
| 663 | break; |
| 664 | default: |
| 665 | ret = -EINVAL; |
| 666 | goto out; |
| 667 | } |
| 668 | |
| 669 | rtnl_lock(); |
| 670 | |
| 671 | ret = -ENODEV; |
| 672 | if ((dev = __dev_get_by_name(ifr.ifr_name)) == NULL) |
| 673 | goto done; |
| 674 | |
| 675 | if (colon) |
| 676 | *colon = ':'; |
| 677 | |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 678 | if ((in_dev = __in_dev_get_rtnl(dev)) != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | if (tryaddrmatch) { |
| 680 | /* Matthias Andree */ |
| 681 | /* compare label and address (4.4BSD style) */ |
| 682 | /* note: we only do this for a limited set of ioctls |
| 683 | and only if the original address family was AF_INET. |
| 684 | This is checked above. */ |
| 685 | for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL; |
| 686 | ifap = &ifa->ifa_next) { |
| 687 | if (!strcmp(ifr.ifr_name, ifa->ifa_label) && |
| 688 | sin_orig.sin_addr.s_addr == |
| 689 | ifa->ifa_address) { |
| 690 | break; /* found */ |
| 691 | } |
| 692 | } |
| 693 | } |
| 694 | /* we didn't get a match, maybe the application is |
| 695 | 4.3BSD-style and passed in junk so we fall back to |
| 696 | comparing just the label */ |
| 697 | if (!ifa) { |
| 698 | for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL; |
| 699 | ifap = &ifa->ifa_next) |
| 700 | if (!strcmp(ifr.ifr_name, ifa->ifa_label)) |
| 701 | break; |
| 702 | } |
| 703 | } |
| 704 | |
| 705 | ret = -EADDRNOTAVAIL; |
| 706 | if (!ifa && cmd != SIOCSIFADDR && cmd != SIOCSIFFLAGS) |
| 707 | goto done; |
| 708 | |
| 709 | switch(cmd) { |
| 710 | case SIOCGIFADDR: /* Get interface address */ |
| 711 | sin->sin_addr.s_addr = ifa->ifa_local; |
| 712 | goto rarok; |
| 713 | |
| 714 | case SIOCGIFBRDADDR: /* Get the broadcast address */ |
| 715 | sin->sin_addr.s_addr = ifa->ifa_broadcast; |
| 716 | goto rarok; |
| 717 | |
| 718 | case SIOCGIFDSTADDR: /* Get the destination address */ |
| 719 | sin->sin_addr.s_addr = ifa->ifa_address; |
| 720 | goto rarok; |
| 721 | |
| 722 | case SIOCGIFNETMASK: /* Get the netmask for the interface */ |
| 723 | sin->sin_addr.s_addr = ifa->ifa_mask; |
| 724 | goto rarok; |
| 725 | |
| 726 | case SIOCSIFFLAGS: |
| 727 | if (colon) { |
| 728 | ret = -EADDRNOTAVAIL; |
| 729 | if (!ifa) |
| 730 | break; |
| 731 | ret = 0; |
| 732 | if (!(ifr.ifr_flags & IFF_UP)) |
| 733 | inet_del_ifa(in_dev, ifap, 1); |
| 734 | break; |
| 735 | } |
| 736 | ret = dev_change_flags(dev, ifr.ifr_flags); |
| 737 | break; |
| 738 | |
| 739 | case SIOCSIFADDR: /* Set interface address (and family) */ |
| 740 | ret = -EINVAL; |
| 741 | if (inet_abc_len(sin->sin_addr.s_addr) < 0) |
| 742 | break; |
| 743 | |
| 744 | if (!ifa) { |
| 745 | ret = -ENOBUFS; |
| 746 | if ((ifa = inet_alloc_ifa()) == NULL) |
| 747 | break; |
| 748 | if (colon) |
| 749 | memcpy(ifa->ifa_label, ifr.ifr_name, IFNAMSIZ); |
| 750 | else |
| 751 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
| 752 | } else { |
| 753 | ret = 0; |
| 754 | if (ifa->ifa_local == sin->sin_addr.s_addr) |
| 755 | break; |
| 756 | inet_del_ifa(in_dev, ifap, 0); |
| 757 | ifa->ifa_broadcast = 0; |
| 758 | ifa->ifa_anycast = 0; |
| 759 | } |
| 760 | |
| 761 | ifa->ifa_address = ifa->ifa_local = sin->sin_addr.s_addr; |
| 762 | |
| 763 | if (!(dev->flags & IFF_POINTOPOINT)) { |
| 764 | ifa->ifa_prefixlen = inet_abc_len(ifa->ifa_address); |
| 765 | ifa->ifa_mask = inet_make_mask(ifa->ifa_prefixlen); |
| 766 | if ((dev->flags & IFF_BROADCAST) && |
| 767 | ifa->ifa_prefixlen < 31) |
| 768 | ifa->ifa_broadcast = ifa->ifa_address | |
| 769 | ~ifa->ifa_mask; |
| 770 | } else { |
| 771 | ifa->ifa_prefixlen = 32; |
| 772 | ifa->ifa_mask = inet_make_mask(32); |
| 773 | } |
| 774 | ret = inet_set_ifa(dev, ifa); |
| 775 | break; |
| 776 | |
| 777 | case SIOCSIFBRDADDR: /* Set the broadcast address */ |
| 778 | ret = 0; |
| 779 | if (ifa->ifa_broadcast != sin->sin_addr.s_addr) { |
| 780 | inet_del_ifa(in_dev, ifap, 0); |
| 781 | ifa->ifa_broadcast = sin->sin_addr.s_addr; |
| 782 | inet_insert_ifa(ifa); |
| 783 | } |
| 784 | break; |
| 785 | |
| 786 | case SIOCSIFDSTADDR: /* Set the destination address */ |
| 787 | ret = 0; |
| 788 | if (ifa->ifa_address == sin->sin_addr.s_addr) |
| 789 | break; |
| 790 | ret = -EINVAL; |
| 791 | if (inet_abc_len(sin->sin_addr.s_addr) < 0) |
| 792 | break; |
| 793 | ret = 0; |
| 794 | inet_del_ifa(in_dev, ifap, 0); |
| 795 | ifa->ifa_address = sin->sin_addr.s_addr; |
| 796 | inet_insert_ifa(ifa); |
| 797 | break; |
| 798 | |
| 799 | case SIOCSIFNETMASK: /* Set the netmask for the interface */ |
| 800 | |
| 801 | /* |
| 802 | * The mask we set must be legal. |
| 803 | */ |
| 804 | ret = -EINVAL; |
| 805 | if (bad_mask(sin->sin_addr.s_addr, 0)) |
| 806 | break; |
| 807 | ret = 0; |
| 808 | if (ifa->ifa_mask != sin->sin_addr.s_addr) { |
Al Viro | a144ea4 | 2006-09-28 18:00:55 -0700 | [diff] [blame] | 809 | __be32 old_mask = ifa->ifa_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | inet_del_ifa(in_dev, ifap, 0); |
| 811 | ifa->ifa_mask = sin->sin_addr.s_addr; |
| 812 | ifa->ifa_prefixlen = inet_mask_len(ifa->ifa_mask); |
| 813 | |
| 814 | /* See if current broadcast address matches |
| 815 | * with current netmask, then recalculate |
| 816 | * the broadcast address. Otherwise it's a |
| 817 | * funny address, so don't touch it since |
| 818 | * the user seems to know what (s)he's doing... |
| 819 | */ |
| 820 | if ((dev->flags & IFF_BROADCAST) && |
| 821 | (ifa->ifa_prefixlen < 31) && |
| 822 | (ifa->ifa_broadcast == |
David Engel | dcab5e1 | 2005-10-21 22:09:16 -0500 | [diff] [blame] | 823 | (ifa->ifa_local|~old_mask))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | ifa->ifa_broadcast = (ifa->ifa_local | |
| 825 | ~sin->sin_addr.s_addr); |
| 826 | } |
| 827 | inet_insert_ifa(ifa); |
| 828 | } |
| 829 | break; |
| 830 | } |
| 831 | done: |
| 832 | rtnl_unlock(); |
| 833 | out: |
| 834 | return ret; |
| 835 | rarok: |
| 836 | rtnl_unlock(); |
| 837 | ret = copy_to_user(arg, &ifr, sizeof(struct ifreq)) ? -EFAULT : 0; |
| 838 | goto out; |
| 839 | } |
| 840 | |
| 841 | static int inet_gifconf(struct net_device *dev, char __user *buf, int len) |
| 842 | { |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 843 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | struct in_ifaddr *ifa; |
| 845 | struct ifreq ifr; |
| 846 | int done = 0; |
| 847 | |
| 848 | if (!in_dev || (ifa = in_dev->ifa_list) == NULL) |
| 849 | goto out; |
| 850 | |
| 851 | for (; ifa; ifa = ifa->ifa_next) { |
| 852 | if (!buf) { |
| 853 | done += sizeof(ifr); |
| 854 | continue; |
| 855 | } |
| 856 | if (len < (int) sizeof(ifr)) |
| 857 | break; |
| 858 | memset(&ifr, 0, sizeof(struct ifreq)); |
| 859 | if (ifa->ifa_label) |
| 860 | strcpy(ifr.ifr_name, ifa->ifa_label); |
| 861 | else |
| 862 | strcpy(ifr.ifr_name, dev->name); |
| 863 | |
| 864 | (*(struct sockaddr_in *)&ifr.ifr_addr).sin_family = AF_INET; |
| 865 | (*(struct sockaddr_in *)&ifr.ifr_addr).sin_addr.s_addr = |
| 866 | ifa->ifa_local; |
| 867 | |
| 868 | if (copy_to_user(buf, &ifr, sizeof(struct ifreq))) { |
| 869 | done = -EFAULT; |
| 870 | break; |
| 871 | } |
| 872 | buf += sizeof(struct ifreq); |
| 873 | len -= sizeof(struct ifreq); |
| 874 | done += sizeof(struct ifreq); |
| 875 | } |
| 876 | out: |
| 877 | return done; |
| 878 | } |
| 879 | |
Al Viro | a61ced5 | 2006-09-26 21:27:54 -0700 | [diff] [blame] | 880 | __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | { |
Al Viro | a61ced5 | 2006-09-26 21:27:54 -0700 | [diff] [blame] | 882 | __be32 addr = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | struct in_device *in_dev; |
| 884 | |
| 885 | rcu_read_lock(); |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 886 | in_dev = __in_dev_get_rcu(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | if (!in_dev) |
| 888 | goto no_in_dev; |
| 889 | |
| 890 | for_primary_ifa(in_dev) { |
| 891 | if (ifa->ifa_scope > scope) |
| 892 | continue; |
| 893 | if (!dst || inet_ifa_match(dst, ifa)) { |
| 894 | addr = ifa->ifa_local; |
| 895 | break; |
| 896 | } |
| 897 | if (!addr) |
| 898 | addr = ifa->ifa_local; |
| 899 | } endfor_ifa(in_dev); |
| 900 | no_in_dev: |
| 901 | rcu_read_unlock(); |
| 902 | |
| 903 | if (addr) |
| 904 | goto out; |
| 905 | |
| 906 | /* Not loopback addresses on loopback should be preferred |
| 907 | in this case. It is importnat that lo is the first interface |
| 908 | in dev_base list. |
| 909 | */ |
| 910 | read_lock(&dev_base_lock); |
| 911 | rcu_read_lock(); |
| 912 | for (dev = dev_base; dev; dev = dev->next) { |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 913 | if ((in_dev = __in_dev_get_rcu(dev)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | continue; |
| 915 | |
| 916 | for_primary_ifa(in_dev) { |
| 917 | if (ifa->ifa_scope != RT_SCOPE_LINK && |
| 918 | ifa->ifa_scope <= scope) { |
| 919 | addr = ifa->ifa_local; |
| 920 | goto out_unlock_both; |
| 921 | } |
| 922 | } endfor_ifa(in_dev); |
| 923 | } |
| 924 | out_unlock_both: |
| 925 | read_unlock(&dev_base_lock); |
| 926 | rcu_read_unlock(); |
| 927 | out: |
| 928 | return addr; |
| 929 | } |
| 930 | |
Al Viro | 60cad5d | 2006-09-26 22:17:09 -0700 | [diff] [blame] | 931 | static __be32 confirm_addr_indev(struct in_device *in_dev, __be32 dst, |
| 932 | __be32 local, int scope) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | { |
| 934 | int same = 0; |
Al Viro | a144ea4 | 2006-09-28 18:00:55 -0700 | [diff] [blame] | 935 | __be32 addr = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | |
| 937 | for_ifa(in_dev) { |
| 938 | if (!addr && |
| 939 | (local == ifa->ifa_local || !local) && |
| 940 | ifa->ifa_scope <= scope) { |
| 941 | addr = ifa->ifa_local; |
| 942 | if (same) |
| 943 | break; |
| 944 | } |
| 945 | if (!same) { |
| 946 | same = (!local || inet_ifa_match(local, ifa)) && |
| 947 | (!dst || inet_ifa_match(dst, ifa)); |
| 948 | if (same && addr) { |
| 949 | if (local || !dst) |
| 950 | break; |
| 951 | /* Is the selected addr into dst subnet? */ |
| 952 | if (inet_ifa_match(addr, ifa)) |
| 953 | break; |
| 954 | /* No, then can we use new local src? */ |
| 955 | if (ifa->ifa_scope <= scope) { |
| 956 | addr = ifa->ifa_local; |
| 957 | break; |
| 958 | } |
| 959 | /* search for large dst subnet for addr */ |
| 960 | same = 0; |
| 961 | } |
| 962 | } |
| 963 | } endfor_ifa(in_dev); |
| 964 | |
| 965 | return same? addr : 0; |
| 966 | } |
| 967 | |
| 968 | /* |
| 969 | * Confirm that local IP address exists using wildcards: |
| 970 | * - dev: only on this interface, 0=any interface |
| 971 | * - dst: only in the same subnet as dst, 0=any dst |
| 972 | * - local: address, 0=autoselect the local address |
| 973 | * - scope: maximum allowed scope value for the local address |
| 974 | */ |
Al Viro | 60cad5d | 2006-09-26 22:17:09 -0700 | [diff] [blame] | 975 | __be32 inet_confirm_addr(const struct net_device *dev, __be32 dst, __be32 local, int scope) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | { |
Al Viro | 60cad5d | 2006-09-26 22:17:09 -0700 | [diff] [blame] | 977 | __be32 addr = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | struct in_device *in_dev; |
| 979 | |
| 980 | if (dev) { |
| 981 | rcu_read_lock(); |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 982 | if ((in_dev = __in_dev_get_rcu(dev))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | addr = confirm_addr_indev(in_dev, dst, local, scope); |
| 984 | rcu_read_unlock(); |
| 985 | |
| 986 | return addr; |
| 987 | } |
| 988 | |
| 989 | read_lock(&dev_base_lock); |
| 990 | rcu_read_lock(); |
| 991 | for (dev = dev_base; dev; dev = dev->next) { |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 992 | if ((in_dev = __in_dev_get_rcu(dev))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | addr = confirm_addr_indev(in_dev, dst, local, scope); |
| 994 | if (addr) |
| 995 | break; |
| 996 | } |
| 997 | } |
| 998 | rcu_read_unlock(); |
| 999 | read_unlock(&dev_base_lock); |
| 1000 | |
| 1001 | return addr; |
| 1002 | } |
| 1003 | |
| 1004 | /* |
| 1005 | * Device notifier |
| 1006 | */ |
| 1007 | |
| 1008 | int register_inetaddr_notifier(struct notifier_block *nb) |
| 1009 | { |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 1010 | return blocking_notifier_chain_register(&inetaddr_chain, nb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | } |
| 1012 | |
| 1013 | int unregister_inetaddr_notifier(struct notifier_block *nb) |
| 1014 | { |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 1015 | return blocking_notifier_chain_unregister(&inetaddr_chain, nb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | } |
| 1017 | |
| 1018 | /* Rename ifa_labels for a device name change. Make some effort to preserve existing |
| 1019 | * alias numbering and to create unique labels if possible. |
| 1020 | */ |
| 1021 | static void inetdev_changename(struct net_device *dev, struct in_device *in_dev) |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1022 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | struct in_ifaddr *ifa; |
| 1024 | int named = 0; |
| 1025 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1026 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { |
| 1027 | char old[IFNAMSIZ], *dot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | |
| 1029 | memcpy(old, ifa->ifa_label, IFNAMSIZ); |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1030 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | if (named++ == 0) |
| 1032 | continue; |
| 1033 | dot = strchr(ifa->ifa_label, ':'); |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1034 | if (dot == NULL) { |
| 1035 | sprintf(old, ":%d", named); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | dot = old; |
| 1037 | } |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1038 | if (strlen(dot) + strlen(dev->name) < IFNAMSIZ) { |
| 1039 | strcat(ifa->ifa_label, dot); |
| 1040 | } else { |
| 1041 | strcpy(ifa->ifa_label + (IFNAMSIZ - strlen(dot) - 1), dot); |
| 1042 | } |
| 1043 | } |
| 1044 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | |
| 1046 | /* Called only under RTNL semaphore */ |
| 1047 | |
| 1048 | static int inetdev_event(struct notifier_block *this, unsigned long event, |
| 1049 | void *ptr) |
| 1050 | { |
| 1051 | struct net_device *dev = ptr; |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 1052 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | |
| 1054 | ASSERT_RTNL(); |
| 1055 | |
| 1056 | if (!in_dev) { |
| 1057 | if (event == NETDEV_REGISTER && dev == &loopback_dev) { |
| 1058 | in_dev = inetdev_init(dev); |
| 1059 | if (!in_dev) |
| 1060 | panic("devinet: Failed to create loopback\n"); |
| 1061 | in_dev->cnf.no_xfrm = 1; |
| 1062 | in_dev->cnf.no_policy = 1; |
| 1063 | } |
| 1064 | goto out; |
| 1065 | } |
| 1066 | |
| 1067 | switch (event) { |
| 1068 | case NETDEV_REGISTER: |
| 1069 | printk(KERN_DEBUG "inetdev_event: bug\n"); |
| 1070 | dev->ip_ptr = NULL; |
| 1071 | break; |
| 1072 | case NETDEV_UP: |
| 1073 | if (dev->mtu < 68) |
| 1074 | break; |
| 1075 | if (dev == &loopback_dev) { |
| 1076 | struct in_ifaddr *ifa; |
| 1077 | if ((ifa = inet_alloc_ifa()) != NULL) { |
| 1078 | ifa->ifa_local = |
| 1079 | ifa->ifa_address = htonl(INADDR_LOOPBACK); |
| 1080 | ifa->ifa_prefixlen = 8; |
| 1081 | ifa->ifa_mask = inet_make_mask(8); |
| 1082 | in_dev_hold(in_dev); |
| 1083 | ifa->ifa_dev = in_dev; |
| 1084 | ifa->ifa_scope = RT_SCOPE_HOST; |
| 1085 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
| 1086 | inet_insert_ifa(ifa); |
| 1087 | } |
| 1088 | } |
| 1089 | ip_mc_up(in_dev); |
| 1090 | break; |
| 1091 | case NETDEV_DOWN: |
| 1092 | ip_mc_down(in_dev); |
| 1093 | break; |
| 1094 | case NETDEV_CHANGEMTU: |
| 1095 | if (dev->mtu >= 68) |
| 1096 | break; |
| 1097 | /* MTU falled under 68, disable IP */ |
| 1098 | case NETDEV_UNREGISTER: |
| 1099 | inetdev_destroy(in_dev); |
| 1100 | break; |
| 1101 | case NETDEV_CHANGENAME: |
| 1102 | /* Do not notify about label change, this event is |
| 1103 | * not interesting to applications using netlink. |
| 1104 | */ |
| 1105 | inetdev_changename(dev, in_dev); |
| 1106 | |
| 1107 | #ifdef CONFIG_SYSCTL |
| 1108 | devinet_sysctl_unregister(&in_dev->cnf); |
| 1109 | neigh_sysctl_unregister(in_dev->arp_parms); |
| 1110 | neigh_sysctl_register(dev, in_dev->arp_parms, NET_IPV4, |
| 1111 | NET_IPV4_NEIGH, "ipv4", NULL, NULL); |
| 1112 | devinet_sysctl_register(in_dev, &in_dev->cnf); |
| 1113 | #endif |
| 1114 | break; |
| 1115 | } |
| 1116 | out: |
| 1117 | return NOTIFY_DONE; |
| 1118 | } |
| 1119 | |
| 1120 | static struct notifier_block ip_netdev_notifier = { |
| 1121 | .notifier_call =inetdev_event, |
| 1122 | }; |
| 1123 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 1124 | static inline size_t inet_nlmsg_size(void) |
| 1125 | { |
| 1126 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
| 1127 | + nla_total_size(4) /* IFA_ADDRESS */ |
| 1128 | + nla_total_size(4) /* IFA_LOCAL */ |
| 1129 | + nla_total_size(4) /* IFA_BROADCAST */ |
| 1130 | + nla_total_size(4) /* IFA_ANYCAST */ |
| 1131 | + nla_total_size(IFNAMSIZ); /* IFA_LABEL */ |
| 1132 | } |
| 1133 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | static int inet_fill_ifaddr(struct sk_buff *skb, struct in_ifaddr *ifa, |
Jamal Hadi Salim | b6544c0 | 2005-06-18 22:54:12 -0700 | [diff] [blame] | 1135 | u32 pid, u32 seq, int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | { |
| 1137 | struct ifaddrmsg *ifm; |
| 1138 | struct nlmsghdr *nlh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | |
Thomas Graf | 47f6851 | 2006-08-04 23:04:36 -0700 | [diff] [blame] | 1140 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), flags); |
| 1141 | if (nlh == NULL) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 1142 | return -EMSGSIZE; |
Thomas Graf | 47f6851 | 2006-08-04 23:04:36 -0700 | [diff] [blame] | 1143 | |
| 1144 | ifm = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1145 | ifm->ifa_family = AF_INET; |
| 1146 | ifm->ifa_prefixlen = ifa->ifa_prefixlen; |
| 1147 | ifm->ifa_flags = ifa->ifa_flags|IFA_F_PERMANENT; |
| 1148 | ifm->ifa_scope = ifa->ifa_scope; |
| 1149 | ifm->ifa_index = ifa->ifa_dev->dev->ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1150 | |
Thomas Graf | 47f6851 | 2006-08-04 23:04:36 -0700 | [diff] [blame] | 1151 | if (ifa->ifa_address) |
Al Viro | a7a628c | 2006-09-26 22:16:43 -0700 | [diff] [blame] | 1152 | NLA_PUT_BE32(skb, IFA_ADDRESS, ifa->ifa_address); |
Thomas Graf | 47f6851 | 2006-08-04 23:04:36 -0700 | [diff] [blame] | 1153 | |
| 1154 | if (ifa->ifa_local) |
Al Viro | a7a628c | 2006-09-26 22:16:43 -0700 | [diff] [blame] | 1155 | NLA_PUT_BE32(skb, IFA_LOCAL, ifa->ifa_local); |
Thomas Graf | 47f6851 | 2006-08-04 23:04:36 -0700 | [diff] [blame] | 1156 | |
| 1157 | if (ifa->ifa_broadcast) |
Al Viro | a7a628c | 2006-09-26 22:16:43 -0700 | [diff] [blame] | 1158 | NLA_PUT_BE32(skb, IFA_BROADCAST, ifa->ifa_broadcast); |
Thomas Graf | 47f6851 | 2006-08-04 23:04:36 -0700 | [diff] [blame] | 1159 | |
| 1160 | if (ifa->ifa_anycast) |
Al Viro | a7a628c | 2006-09-26 22:16:43 -0700 | [diff] [blame] | 1161 | NLA_PUT_BE32(skb, IFA_ANYCAST, ifa->ifa_anycast); |
Thomas Graf | 47f6851 | 2006-08-04 23:04:36 -0700 | [diff] [blame] | 1162 | |
| 1163 | if (ifa->ifa_label[0]) |
| 1164 | NLA_PUT_STRING(skb, IFA_LABEL, ifa->ifa_label); |
| 1165 | |
| 1166 | return nlmsg_end(skb, nlh); |
| 1167 | |
| 1168 | nla_put_failure: |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 1169 | nlmsg_cancel(skb, nlh); |
| 1170 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | } |
| 1172 | |
| 1173 | static int inet_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) |
| 1174 | { |
| 1175 | int idx, ip_idx; |
| 1176 | struct net_device *dev; |
| 1177 | struct in_device *in_dev; |
| 1178 | struct in_ifaddr *ifa; |
| 1179 | int s_ip_idx, s_idx = cb->args[0]; |
| 1180 | |
| 1181 | s_ip_idx = ip_idx = cb->args[1]; |
| 1182 | read_lock(&dev_base_lock); |
| 1183 | for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) { |
| 1184 | if (idx < s_idx) |
| 1185 | continue; |
| 1186 | if (idx > s_idx) |
| 1187 | s_ip_idx = 0; |
| 1188 | rcu_read_lock(); |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 1189 | if ((in_dev = __in_dev_get_rcu(dev)) == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1190 | rcu_read_unlock(); |
| 1191 | continue; |
| 1192 | } |
| 1193 | |
| 1194 | for (ifa = in_dev->ifa_list, ip_idx = 0; ifa; |
| 1195 | ifa = ifa->ifa_next, ip_idx++) { |
| 1196 | if (ip_idx < s_ip_idx) |
| 1197 | continue; |
| 1198 | if (inet_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid, |
| 1199 | cb->nlh->nlmsg_seq, |
Jamal Hadi Salim | b6544c0 | 2005-06-18 22:54:12 -0700 | [diff] [blame] | 1200 | RTM_NEWADDR, NLM_F_MULTI) <= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | rcu_read_unlock(); |
| 1202 | goto done; |
| 1203 | } |
| 1204 | } |
| 1205 | rcu_read_unlock(); |
| 1206 | } |
| 1207 | |
| 1208 | done: |
| 1209 | read_unlock(&dev_base_lock); |
| 1210 | cb->args[0] = idx; |
| 1211 | cb->args[1] = ip_idx; |
| 1212 | |
| 1213 | return skb->len; |
| 1214 | } |
| 1215 | |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 1216 | static void rtmsg_ifa(int event, struct in_ifaddr* ifa, struct nlmsghdr *nlh, |
| 1217 | u32 pid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | { |
Thomas Graf | 47f6851 | 2006-08-04 23:04:36 -0700 | [diff] [blame] | 1219 | struct sk_buff *skb; |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 1220 | u32 seq = nlh ? nlh->nlmsg_seq : 0; |
| 1221 | int err = -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 1223 | skb = nlmsg_new(inet_nlmsg_size(), GFP_KERNEL); |
Thomas Graf | 47f6851 | 2006-08-04 23:04:36 -0700 | [diff] [blame] | 1224 | if (skb == NULL) |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 1225 | goto errout; |
| 1226 | |
| 1227 | err = inet_fill_ifaddr(skb, ifa, pid, seq, event, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 1228 | if (err < 0) { |
| 1229 | /* -EMSGSIZE implies BUG in inet_nlmsg_size() */ |
| 1230 | WARN_ON(err == -EMSGSIZE); |
| 1231 | kfree_skb(skb); |
| 1232 | goto errout; |
| 1233 | } |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 1234 | err = rtnl_notify(skb, pid, RTNLGRP_IPV4_IFADDR, nlh, GFP_KERNEL); |
| 1235 | errout: |
| 1236 | if (err < 0) |
| 1237 | rtnl_set_sk_err(RTNLGRP_IPV4_IFADDR, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1238 | } |
| 1239 | |
Thomas Graf | db46edc | 2005-05-03 14:29:39 -0700 | [diff] [blame] | 1240 | static struct rtnetlink_link inet_rtnetlink_table[RTM_NR_MSGTYPES] = { |
| 1241 | [RTM_NEWADDR - RTM_BASE] = { .doit = inet_rtm_newaddr, }, |
| 1242 | [RTM_DELADDR - RTM_BASE] = { .doit = inet_rtm_deladdr, }, |
| 1243 | [RTM_GETADDR - RTM_BASE] = { .dumpit = inet_dump_ifaddr, }, |
| 1244 | [RTM_NEWROUTE - RTM_BASE] = { .doit = inet_rtm_newroute, }, |
| 1245 | [RTM_DELROUTE - RTM_BASE] = { .doit = inet_rtm_delroute, }, |
| 1246 | [RTM_GETROUTE - RTM_BASE] = { .doit = inet_rtm_getroute, |
| 1247 | .dumpit = inet_dump_fib, }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1248 | #ifdef CONFIG_IP_MULTIPLE_TABLES |
Thomas Graf | e1ef4bf | 2006-08-04 03:39:22 -0700 | [diff] [blame] | 1249 | [RTM_GETRULE - RTM_BASE] = { .dumpit = fib4_rules_dump, }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1250 | #endif |
| 1251 | }; |
| 1252 | |
| 1253 | #ifdef CONFIG_SYSCTL |
| 1254 | |
| 1255 | void inet_forward_change(void) |
| 1256 | { |
| 1257 | struct net_device *dev; |
| 1258 | int on = ipv4_devconf.forwarding; |
| 1259 | |
| 1260 | ipv4_devconf.accept_redirects = !on; |
| 1261 | ipv4_devconf_dflt.forwarding = on; |
| 1262 | |
| 1263 | read_lock(&dev_base_lock); |
| 1264 | for (dev = dev_base; dev; dev = dev->next) { |
| 1265 | struct in_device *in_dev; |
| 1266 | rcu_read_lock(); |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 1267 | in_dev = __in_dev_get_rcu(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1268 | if (in_dev) |
| 1269 | in_dev->cnf.forwarding = on; |
| 1270 | rcu_read_unlock(); |
| 1271 | } |
| 1272 | read_unlock(&dev_base_lock); |
| 1273 | |
| 1274 | rt_cache_flush(0); |
| 1275 | } |
| 1276 | |
| 1277 | static int devinet_sysctl_forward(ctl_table *ctl, int write, |
| 1278 | struct file* filp, void __user *buffer, |
| 1279 | size_t *lenp, loff_t *ppos) |
| 1280 | { |
| 1281 | int *valp = ctl->data; |
| 1282 | int val = *valp; |
| 1283 | int ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); |
| 1284 | |
| 1285 | if (write && *valp != val) { |
| 1286 | if (valp == &ipv4_devconf.forwarding) |
| 1287 | inet_forward_change(); |
| 1288 | else if (valp != &ipv4_devconf_dflt.forwarding) |
| 1289 | rt_cache_flush(0); |
| 1290 | } |
| 1291 | |
| 1292 | return ret; |
| 1293 | } |
| 1294 | |
| 1295 | int ipv4_doint_and_flush(ctl_table *ctl, int write, |
| 1296 | struct file* filp, void __user *buffer, |
| 1297 | size_t *lenp, loff_t *ppos) |
| 1298 | { |
| 1299 | int *valp = ctl->data; |
| 1300 | int val = *valp; |
| 1301 | int ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); |
| 1302 | |
| 1303 | if (write && *valp != val) |
| 1304 | rt_cache_flush(0); |
| 1305 | |
| 1306 | return ret; |
| 1307 | } |
| 1308 | |
| 1309 | int ipv4_doint_and_flush_strategy(ctl_table *table, int __user *name, int nlen, |
| 1310 | void __user *oldval, size_t __user *oldlenp, |
Alexey Dobriyan | 1f29bcd | 2006-12-10 02:19:10 -0800 | [diff] [blame] | 1311 | void __user *newval, size_t newlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | { |
| 1313 | int *valp = table->data; |
| 1314 | int new; |
| 1315 | |
| 1316 | if (!newval || !newlen) |
| 1317 | return 0; |
| 1318 | |
| 1319 | if (newlen != sizeof(int)) |
| 1320 | return -EINVAL; |
| 1321 | |
| 1322 | if (get_user(new, (int __user *)newval)) |
| 1323 | return -EFAULT; |
| 1324 | |
| 1325 | if (new == *valp) |
| 1326 | return 0; |
| 1327 | |
| 1328 | if (oldval && oldlenp) { |
| 1329 | size_t len; |
| 1330 | |
| 1331 | if (get_user(len, oldlenp)) |
| 1332 | return -EFAULT; |
| 1333 | |
| 1334 | if (len) { |
| 1335 | if (len > table->maxlen) |
| 1336 | len = table->maxlen; |
| 1337 | if (copy_to_user(oldval, valp, len)) |
| 1338 | return -EFAULT; |
| 1339 | if (put_user(len, oldlenp)) |
| 1340 | return -EFAULT; |
| 1341 | } |
| 1342 | } |
| 1343 | |
| 1344 | *valp = new; |
| 1345 | rt_cache_flush(0); |
| 1346 | return 1; |
| 1347 | } |
| 1348 | |
| 1349 | |
| 1350 | static struct devinet_sysctl_table { |
| 1351 | struct ctl_table_header *sysctl_header; |
| 1352 | ctl_table devinet_vars[__NET_IPV4_CONF_MAX]; |
| 1353 | ctl_table devinet_dev[2]; |
| 1354 | ctl_table devinet_conf_dir[2]; |
| 1355 | ctl_table devinet_proto_dir[2]; |
| 1356 | ctl_table devinet_root_dir[2]; |
| 1357 | } devinet_sysctl = { |
| 1358 | .devinet_vars = { |
| 1359 | { |
| 1360 | .ctl_name = NET_IPV4_CONF_FORWARDING, |
| 1361 | .procname = "forwarding", |
| 1362 | .data = &ipv4_devconf.forwarding, |
| 1363 | .maxlen = sizeof(int), |
| 1364 | .mode = 0644, |
| 1365 | .proc_handler = &devinet_sysctl_forward, |
| 1366 | }, |
| 1367 | { |
| 1368 | .ctl_name = NET_IPV4_CONF_MC_FORWARDING, |
| 1369 | .procname = "mc_forwarding", |
| 1370 | .data = &ipv4_devconf.mc_forwarding, |
| 1371 | .maxlen = sizeof(int), |
| 1372 | .mode = 0444, |
| 1373 | .proc_handler = &proc_dointvec, |
| 1374 | }, |
| 1375 | { |
| 1376 | .ctl_name = NET_IPV4_CONF_ACCEPT_REDIRECTS, |
| 1377 | .procname = "accept_redirects", |
| 1378 | .data = &ipv4_devconf.accept_redirects, |
| 1379 | .maxlen = sizeof(int), |
| 1380 | .mode = 0644, |
| 1381 | .proc_handler = &proc_dointvec, |
| 1382 | }, |
| 1383 | { |
| 1384 | .ctl_name = NET_IPV4_CONF_SECURE_REDIRECTS, |
| 1385 | .procname = "secure_redirects", |
| 1386 | .data = &ipv4_devconf.secure_redirects, |
| 1387 | .maxlen = sizeof(int), |
| 1388 | .mode = 0644, |
| 1389 | .proc_handler = &proc_dointvec, |
| 1390 | }, |
| 1391 | { |
| 1392 | .ctl_name = NET_IPV4_CONF_SHARED_MEDIA, |
| 1393 | .procname = "shared_media", |
| 1394 | .data = &ipv4_devconf.shared_media, |
| 1395 | .maxlen = sizeof(int), |
| 1396 | .mode = 0644, |
| 1397 | .proc_handler = &proc_dointvec, |
| 1398 | }, |
| 1399 | { |
| 1400 | .ctl_name = NET_IPV4_CONF_RP_FILTER, |
| 1401 | .procname = "rp_filter", |
| 1402 | .data = &ipv4_devconf.rp_filter, |
| 1403 | .maxlen = sizeof(int), |
| 1404 | .mode = 0644, |
| 1405 | .proc_handler = &proc_dointvec, |
| 1406 | }, |
| 1407 | { |
| 1408 | .ctl_name = NET_IPV4_CONF_SEND_REDIRECTS, |
| 1409 | .procname = "send_redirects", |
| 1410 | .data = &ipv4_devconf.send_redirects, |
| 1411 | .maxlen = sizeof(int), |
| 1412 | .mode = 0644, |
| 1413 | .proc_handler = &proc_dointvec, |
| 1414 | }, |
| 1415 | { |
| 1416 | .ctl_name = NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE, |
| 1417 | .procname = "accept_source_route", |
| 1418 | .data = &ipv4_devconf.accept_source_route, |
| 1419 | .maxlen = sizeof(int), |
| 1420 | .mode = 0644, |
| 1421 | .proc_handler = &proc_dointvec, |
| 1422 | }, |
| 1423 | { |
| 1424 | .ctl_name = NET_IPV4_CONF_PROXY_ARP, |
| 1425 | .procname = "proxy_arp", |
| 1426 | .data = &ipv4_devconf.proxy_arp, |
| 1427 | .maxlen = sizeof(int), |
| 1428 | .mode = 0644, |
| 1429 | .proc_handler = &proc_dointvec, |
| 1430 | }, |
| 1431 | { |
| 1432 | .ctl_name = NET_IPV4_CONF_MEDIUM_ID, |
| 1433 | .procname = "medium_id", |
| 1434 | .data = &ipv4_devconf.medium_id, |
| 1435 | .maxlen = sizeof(int), |
| 1436 | .mode = 0644, |
| 1437 | .proc_handler = &proc_dointvec, |
| 1438 | }, |
| 1439 | { |
| 1440 | .ctl_name = NET_IPV4_CONF_BOOTP_RELAY, |
| 1441 | .procname = "bootp_relay", |
| 1442 | .data = &ipv4_devconf.bootp_relay, |
| 1443 | .maxlen = sizeof(int), |
| 1444 | .mode = 0644, |
| 1445 | .proc_handler = &proc_dointvec, |
| 1446 | }, |
| 1447 | { |
| 1448 | .ctl_name = NET_IPV4_CONF_LOG_MARTIANS, |
| 1449 | .procname = "log_martians", |
| 1450 | .data = &ipv4_devconf.log_martians, |
| 1451 | .maxlen = sizeof(int), |
| 1452 | .mode = 0644, |
| 1453 | .proc_handler = &proc_dointvec, |
| 1454 | }, |
| 1455 | { |
| 1456 | .ctl_name = NET_IPV4_CONF_TAG, |
| 1457 | .procname = "tag", |
| 1458 | .data = &ipv4_devconf.tag, |
| 1459 | .maxlen = sizeof(int), |
| 1460 | .mode = 0644, |
| 1461 | .proc_handler = &proc_dointvec, |
| 1462 | }, |
| 1463 | { |
| 1464 | .ctl_name = NET_IPV4_CONF_ARPFILTER, |
| 1465 | .procname = "arp_filter", |
| 1466 | .data = &ipv4_devconf.arp_filter, |
| 1467 | .maxlen = sizeof(int), |
| 1468 | .mode = 0644, |
| 1469 | .proc_handler = &proc_dointvec, |
| 1470 | }, |
| 1471 | { |
| 1472 | .ctl_name = NET_IPV4_CONF_ARP_ANNOUNCE, |
| 1473 | .procname = "arp_announce", |
| 1474 | .data = &ipv4_devconf.arp_announce, |
| 1475 | .maxlen = sizeof(int), |
| 1476 | .mode = 0644, |
| 1477 | .proc_handler = &proc_dointvec, |
| 1478 | }, |
| 1479 | { |
| 1480 | .ctl_name = NET_IPV4_CONF_ARP_IGNORE, |
| 1481 | .procname = "arp_ignore", |
| 1482 | .data = &ipv4_devconf.arp_ignore, |
| 1483 | .maxlen = sizeof(int), |
| 1484 | .mode = 0644, |
| 1485 | .proc_handler = &proc_dointvec, |
| 1486 | }, |
| 1487 | { |
Neil Horman | abd596a | 2006-03-20 22:39:47 -0800 | [diff] [blame] | 1488 | .ctl_name = NET_IPV4_CONF_ARP_ACCEPT, |
| 1489 | .procname = "arp_accept", |
| 1490 | .data = &ipv4_devconf.arp_accept, |
| 1491 | .maxlen = sizeof(int), |
| 1492 | .mode = 0644, |
| 1493 | .proc_handler = &proc_dointvec, |
| 1494 | }, |
| 1495 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1496 | .ctl_name = NET_IPV4_CONF_NOXFRM, |
| 1497 | .procname = "disable_xfrm", |
| 1498 | .data = &ipv4_devconf.no_xfrm, |
| 1499 | .maxlen = sizeof(int), |
| 1500 | .mode = 0644, |
| 1501 | .proc_handler = &ipv4_doint_and_flush, |
| 1502 | .strategy = &ipv4_doint_and_flush_strategy, |
| 1503 | }, |
| 1504 | { |
| 1505 | .ctl_name = NET_IPV4_CONF_NOPOLICY, |
| 1506 | .procname = "disable_policy", |
| 1507 | .data = &ipv4_devconf.no_policy, |
| 1508 | .maxlen = sizeof(int), |
| 1509 | .mode = 0644, |
| 1510 | .proc_handler = &ipv4_doint_and_flush, |
| 1511 | .strategy = &ipv4_doint_and_flush_strategy, |
| 1512 | }, |
| 1513 | { |
| 1514 | .ctl_name = NET_IPV4_CONF_FORCE_IGMP_VERSION, |
| 1515 | .procname = "force_igmp_version", |
| 1516 | .data = &ipv4_devconf.force_igmp_version, |
| 1517 | .maxlen = sizeof(int), |
| 1518 | .mode = 0644, |
| 1519 | .proc_handler = &ipv4_doint_and_flush, |
| 1520 | .strategy = &ipv4_doint_and_flush_strategy, |
| 1521 | }, |
Harald Welte | 8f937c6 | 2005-05-29 20:23:46 -0700 | [diff] [blame] | 1522 | { |
| 1523 | .ctl_name = NET_IPV4_CONF_PROMOTE_SECONDARIES, |
| 1524 | .procname = "promote_secondaries", |
| 1525 | .data = &ipv4_devconf.promote_secondaries, |
| 1526 | .maxlen = sizeof(int), |
| 1527 | .mode = 0644, |
| 1528 | .proc_handler = &ipv4_doint_and_flush, |
| 1529 | .strategy = &ipv4_doint_and_flush_strategy, |
| 1530 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1531 | }, |
| 1532 | .devinet_dev = { |
| 1533 | { |
| 1534 | .ctl_name = NET_PROTO_CONF_ALL, |
| 1535 | .procname = "all", |
| 1536 | .mode = 0555, |
| 1537 | .child = devinet_sysctl.devinet_vars, |
| 1538 | }, |
| 1539 | }, |
| 1540 | .devinet_conf_dir = { |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1541 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1542 | .ctl_name = NET_IPV4_CONF, |
| 1543 | .procname = "conf", |
| 1544 | .mode = 0555, |
| 1545 | .child = devinet_sysctl.devinet_dev, |
| 1546 | }, |
| 1547 | }, |
| 1548 | .devinet_proto_dir = { |
| 1549 | { |
| 1550 | .ctl_name = NET_IPV4, |
| 1551 | .procname = "ipv4", |
| 1552 | .mode = 0555, |
| 1553 | .child = devinet_sysctl.devinet_conf_dir, |
| 1554 | }, |
| 1555 | }, |
| 1556 | .devinet_root_dir = { |
| 1557 | { |
| 1558 | .ctl_name = CTL_NET, |
| 1559 | .procname = "net", |
| 1560 | .mode = 0555, |
| 1561 | .child = devinet_sysctl.devinet_proto_dir, |
| 1562 | }, |
| 1563 | }, |
| 1564 | }; |
| 1565 | |
| 1566 | static void devinet_sysctl_register(struct in_device *in_dev, |
| 1567 | struct ipv4_devconf *p) |
| 1568 | { |
| 1569 | int i; |
| 1570 | struct net_device *dev = in_dev ? in_dev->dev : NULL; |
Arnaldo Carvalho de Melo | 42e5ea46 | 2006-11-17 11:18:20 -0200 | [diff] [blame] | 1571 | struct devinet_sysctl_table *t = kmemdup(&devinet_sysctl, sizeof(*t), |
| 1572 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1573 | char *dev_name = NULL; |
| 1574 | |
| 1575 | if (!t) |
| 1576 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1577 | for (i = 0; i < ARRAY_SIZE(t->devinet_vars) - 1; i++) { |
| 1578 | t->devinet_vars[i].data += (char *)p - (char *)&ipv4_devconf; |
| 1579 | t->devinet_vars[i].de = NULL; |
| 1580 | } |
| 1581 | |
| 1582 | if (dev) { |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1583 | dev_name = dev->name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1584 | t->devinet_dev[0].ctl_name = dev->ifindex; |
| 1585 | } else { |
| 1586 | dev_name = "default"; |
| 1587 | t->devinet_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT; |
| 1588 | } |
| 1589 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1590 | /* |
| 1591 | * Make a copy of dev_name, because '.procname' is regarded as const |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1592 | * by sysctl and we wouldn't want anyone to change it under our feet |
| 1593 | * (see SIOCSIFNAME). |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1594 | */ |
Paulo Marques | 543537b | 2005-06-23 00:09:02 -0700 | [diff] [blame] | 1595 | dev_name = kstrdup(dev_name, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1596 | if (!dev_name) |
| 1597 | goto free; |
| 1598 | |
| 1599 | t->devinet_dev[0].procname = dev_name; |
| 1600 | t->devinet_dev[0].child = t->devinet_vars; |
| 1601 | t->devinet_dev[0].de = NULL; |
| 1602 | t->devinet_conf_dir[0].child = t->devinet_dev; |
| 1603 | t->devinet_conf_dir[0].de = NULL; |
| 1604 | t->devinet_proto_dir[0].child = t->devinet_conf_dir; |
| 1605 | t->devinet_proto_dir[0].de = NULL; |
| 1606 | t->devinet_root_dir[0].child = t->devinet_proto_dir; |
| 1607 | t->devinet_root_dir[0].de = NULL; |
| 1608 | |
| 1609 | t->sysctl_header = register_sysctl_table(t->devinet_root_dir, 0); |
| 1610 | if (!t->sysctl_header) |
| 1611 | goto free_procname; |
| 1612 | |
| 1613 | p->sysctl = t; |
| 1614 | return; |
| 1615 | |
| 1616 | /* error path */ |
| 1617 | free_procname: |
| 1618 | kfree(dev_name); |
| 1619 | free: |
| 1620 | kfree(t); |
| 1621 | return; |
| 1622 | } |
| 1623 | |
| 1624 | static void devinet_sysctl_unregister(struct ipv4_devconf *p) |
| 1625 | { |
| 1626 | if (p->sysctl) { |
| 1627 | struct devinet_sysctl_table *t = p->sysctl; |
| 1628 | p->sysctl = NULL; |
| 1629 | unregister_sysctl_table(t->sysctl_header); |
| 1630 | kfree(t->devinet_dev[0].procname); |
| 1631 | kfree(t); |
| 1632 | } |
| 1633 | } |
| 1634 | #endif |
| 1635 | |
| 1636 | void __init devinet_init(void) |
| 1637 | { |
| 1638 | register_gifconf(PF_INET, inet_gifconf); |
| 1639 | register_netdevice_notifier(&ip_netdev_notifier); |
| 1640 | rtnetlink_links[PF_INET] = inet_rtnetlink_table; |
| 1641 | #ifdef CONFIG_SYSCTL |
| 1642 | devinet_sysctl.sysctl_header = |
| 1643 | register_sysctl_table(devinet_sysctl.devinet_root_dir, 0); |
| 1644 | devinet_sysctl_register(NULL, &ipv4_devconf_dflt); |
| 1645 | #endif |
| 1646 | } |
| 1647 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1648 | EXPORT_SYMBOL(in_dev_finish_destroy); |
| 1649 | EXPORT_SYMBOL(inet_select_addr); |
| 1650 | EXPORT_SYMBOL(inetdev_by_index); |
| 1651 | EXPORT_SYMBOL(register_inetaddr_notifier); |
| 1652 | EXPORT_SYMBOL(unregister_inetaddr_notifier); |