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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | #include <linux/init.h> |
| 52 | #include <linux/notifier.h> |
| 53 | #include <linux/inetdevice.h> |
| 54 | #include <linux/igmp.h> |
| 55 | #ifdef CONFIG_SYSCTL |
| 56 | #include <linux/sysctl.h> |
| 57 | #endif |
| 58 | #include <linux/kmod.h> |
| 59 | |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 60 | #include <net/arp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | #include <net/ip.h> |
| 62 | #include <net/route.h> |
| 63 | #include <net/ip_fib.h> |
Thomas Graf | 63f3444 | 2007-03-22 11:55:17 -0700 | [diff] [blame] | 64 | #include <net/rtnetlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | |
| 66 | struct ipv4_devconf ipv4_devconf = { |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 67 | .data = { |
| 68 | [NET_IPV4_CONF_ACCEPT_REDIRECTS - 1] = 1, |
| 69 | [NET_IPV4_CONF_SEND_REDIRECTS - 1] = 1, |
| 70 | [NET_IPV4_CONF_SECURE_REDIRECTS - 1] = 1, |
| 71 | [NET_IPV4_CONF_SHARED_MEDIA - 1] = 1, |
| 72 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | }; |
| 74 | |
| 75 | static struct ipv4_devconf ipv4_devconf_dflt = { |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 76 | .data = { |
| 77 | [NET_IPV4_CONF_ACCEPT_REDIRECTS - 1] = 1, |
| 78 | [NET_IPV4_CONF_SEND_REDIRECTS - 1] = 1, |
| 79 | [NET_IPV4_CONF_SECURE_REDIRECTS - 1] = 1, |
| 80 | [NET_IPV4_CONF_SHARED_MEDIA - 1] = 1, |
| 81 | [NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE - 1] = 1, |
| 82 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | }; |
| 84 | |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 85 | #define IPV4_DEVCONF_DFLT(attr) IPV4_DEVCONF(ipv4_devconf_dflt, attr) |
| 86 | |
Patrick McHardy | ef7c79e | 2007-06-05 12:38:30 -0700 | [diff] [blame] | 87 | static const struct nla_policy ifa_ipv4_policy[IFA_MAX+1] = { |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 88 | [IFA_LOCAL] = { .type = NLA_U32 }, |
| 89 | [IFA_ADDRESS] = { .type = NLA_U32 }, |
| 90 | [IFA_BROADCAST] = { .type = NLA_U32 }, |
| 91 | [IFA_ANYCAST] = { .type = NLA_U32 }, |
Thomas Graf | 5176f91 | 2006-08-26 20:13:18 -0700 | [diff] [blame] | 92 | [IFA_LABEL] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 93 | }; |
| 94 | |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 95 | static void rtmsg_ifa(int event, struct in_ifaddr *, struct nlmsghdr *, u32); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 97 | static BLOCKING_NOTIFIER_HEAD(inetaddr_chain); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, |
| 99 | int destroy); |
| 100 | #ifdef CONFIG_SYSCTL |
| 101 | static void devinet_sysctl_register(struct in_device *in_dev, |
| 102 | struct ipv4_devconf *p); |
| 103 | static void devinet_sysctl_unregister(struct ipv4_devconf *p); |
| 104 | #endif |
| 105 | |
| 106 | /* Locks all the inet devices. */ |
| 107 | |
| 108 | static struct in_ifaddr *inet_alloc_ifa(void) |
| 109 | { |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 110 | struct in_ifaddr *ifa = kzalloc(sizeof(*ifa), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | |
| 112 | if (ifa) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | INIT_RCU_HEAD(&ifa->rcu_head); |
| 114 | } |
| 115 | |
| 116 | return ifa; |
| 117 | } |
| 118 | |
| 119 | static void inet_rcu_free_ifa(struct rcu_head *head) |
| 120 | { |
| 121 | struct in_ifaddr *ifa = container_of(head, struct in_ifaddr, rcu_head); |
| 122 | if (ifa->ifa_dev) |
| 123 | in_dev_put(ifa->ifa_dev); |
| 124 | kfree(ifa); |
| 125 | } |
| 126 | |
| 127 | static inline void inet_free_ifa(struct in_ifaddr *ifa) |
| 128 | { |
| 129 | call_rcu(&ifa->rcu_head, inet_rcu_free_ifa); |
| 130 | } |
| 131 | |
| 132 | void in_dev_finish_destroy(struct in_device *idev) |
| 133 | { |
| 134 | struct net_device *dev = idev->dev; |
| 135 | |
| 136 | BUG_TRAP(!idev->ifa_list); |
| 137 | BUG_TRAP(!idev->mc_list); |
| 138 | #ifdef NET_REFCNT_DEBUG |
| 139 | printk(KERN_DEBUG "in_dev_finish_destroy: %p=%s\n", |
| 140 | idev, dev ? dev->name : "NIL"); |
| 141 | #endif |
| 142 | dev_put(dev); |
| 143 | if (!idev->dead) |
| 144 | printk("Freeing alive in_device %p\n", idev); |
| 145 | else { |
| 146 | kfree(idev); |
| 147 | } |
| 148 | } |
| 149 | |
Herbert Xu | 71e27da | 2007-06-04 23:36:06 -0700 | [diff] [blame] | 150 | static struct in_device *inetdev_init(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | { |
| 152 | struct in_device *in_dev; |
| 153 | |
| 154 | ASSERT_RTNL(); |
| 155 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 156 | in_dev = kzalloc(sizeof(*in_dev), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | if (!in_dev) |
| 158 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | INIT_RCU_HEAD(&in_dev->rcu_head); |
| 160 | memcpy(&in_dev->cnf, &ipv4_devconf_dflt, sizeof(in_dev->cnf)); |
| 161 | in_dev->cnf.sysctl = NULL; |
| 162 | in_dev->dev = dev; |
| 163 | if ((in_dev->arp_parms = neigh_parms_alloc(dev, &arp_tbl)) == NULL) |
| 164 | goto out_kfree; |
| 165 | /* Reference in_dev->dev */ |
| 166 | dev_hold(dev); |
| 167 | #ifdef CONFIG_SYSCTL |
| 168 | neigh_sysctl_register(dev, in_dev->arp_parms, NET_IPV4, |
| 169 | NET_IPV4_NEIGH, "ipv4", NULL, NULL); |
| 170 | #endif |
| 171 | |
David L Stevens | 30c4cf5 | 2007-01-04 12:31:14 -0800 | [diff] [blame] | 172 | /* Account for reference dev->ip_ptr (below) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | in_dev_hold(in_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | |
| 175 | #ifdef CONFIG_SYSCTL |
| 176 | devinet_sysctl_register(in_dev, &in_dev->cnf); |
| 177 | #endif |
| 178 | ip_mc_init_dev(in_dev); |
| 179 | if (dev->flags & IFF_UP) |
| 180 | ip_mc_up(in_dev); |
Jarek Poplawski | 483479e | 2007-01-09 14:38:31 -0800 | [diff] [blame] | 181 | |
David L Stevens | 30c4cf5 | 2007-01-04 12:31:14 -0800 | [diff] [blame] | 182 | /* we can receive as soon as ip_ptr is set -- do this last */ |
| 183 | rcu_assign_pointer(dev->ip_ptr, in_dev); |
Jarek Poplawski | 483479e | 2007-01-09 14:38:31 -0800 | [diff] [blame] | 184 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | return in_dev; |
| 186 | out_kfree: |
| 187 | kfree(in_dev); |
| 188 | in_dev = NULL; |
| 189 | goto out; |
| 190 | } |
| 191 | |
| 192 | static void in_dev_rcu_put(struct rcu_head *head) |
| 193 | { |
| 194 | struct in_device *idev = container_of(head, struct in_device, rcu_head); |
| 195 | in_dev_put(idev); |
| 196 | } |
| 197 | |
| 198 | static void inetdev_destroy(struct in_device *in_dev) |
| 199 | { |
| 200 | struct in_ifaddr *ifa; |
| 201 | struct net_device *dev; |
| 202 | |
| 203 | ASSERT_RTNL(); |
| 204 | |
| 205 | dev = in_dev->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | |
| 207 | in_dev->dead = 1; |
| 208 | |
| 209 | ip_mc_destroy_dev(in_dev); |
| 210 | |
| 211 | while ((ifa = in_dev->ifa_list) != NULL) { |
| 212 | inet_del_ifa(in_dev, &in_dev->ifa_list, 0); |
| 213 | inet_free_ifa(ifa); |
| 214 | } |
| 215 | |
| 216 | #ifdef CONFIG_SYSCTL |
| 217 | devinet_sysctl_unregister(&in_dev->cnf); |
| 218 | #endif |
| 219 | |
| 220 | dev->ip_ptr = NULL; |
| 221 | |
| 222 | #ifdef CONFIG_SYSCTL |
| 223 | neigh_sysctl_unregister(in_dev->arp_parms); |
| 224 | #endif |
| 225 | neigh_parms_release(&arp_tbl, in_dev->arp_parms); |
| 226 | arp_ifdown(dev); |
| 227 | |
| 228 | call_rcu(&in_dev->rcu_head, in_dev_rcu_put); |
| 229 | } |
| 230 | |
Al Viro | ff428d7 | 2006-09-26 22:13:35 -0700 | [diff] [blame] | 231 | 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] | 232 | { |
| 233 | rcu_read_lock(); |
| 234 | for_primary_ifa(in_dev) { |
| 235 | if (inet_ifa_match(a, ifa)) { |
| 236 | if (!b || inet_ifa_match(b, ifa)) { |
| 237 | rcu_read_unlock(); |
| 238 | return 1; |
| 239 | } |
| 240 | } |
| 241 | } endfor_ifa(in_dev); |
| 242 | rcu_read_unlock(); |
| 243 | return 0; |
| 244 | } |
| 245 | |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 246 | static void __inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, |
| 247 | int destroy, struct nlmsghdr *nlh, u32 pid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | { |
Harald Welte | 8f937c6 | 2005-05-29 20:23:46 -0700 | [diff] [blame] | 249 | struct in_ifaddr *promote = NULL; |
Jamal Hadi Salim | 0ff60a4 | 2005-11-22 14:47:37 -0800 | [diff] [blame] | 250 | struct in_ifaddr *ifa, *ifa1 = *ifap; |
| 251 | struct in_ifaddr *last_prim = in_dev->ifa_list; |
| 252 | struct in_ifaddr *prev_prom = NULL; |
| 253 | int do_promote = IN_DEV_PROMOTE_SECONDARIES(in_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | |
| 255 | ASSERT_RTNL(); |
| 256 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 257 | /* 1. Deleting primary ifaddr forces deletion all secondaries |
Harald Welte | 8f937c6 | 2005-05-29 20:23:46 -0700 | [diff] [blame] | 258 | * unless alias promotion is set |
| 259 | **/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | |
| 261 | if (!(ifa1->ifa_flags & IFA_F_SECONDARY)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | struct in_ifaddr **ifap1 = &ifa1->ifa_next; |
| 263 | |
| 264 | while ((ifa = *ifap1) != NULL) { |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 265 | if (!(ifa->ifa_flags & IFA_F_SECONDARY) && |
Jamal Hadi Salim | 0ff60a4 | 2005-11-22 14:47:37 -0800 | [diff] [blame] | 266 | ifa1->ifa_scope <= ifa->ifa_scope) |
| 267 | last_prim = ifa; |
| 268 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | if (!(ifa->ifa_flags & IFA_F_SECONDARY) || |
| 270 | ifa1->ifa_mask != ifa->ifa_mask || |
| 271 | !inet_ifa_match(ifa1->ifa_address, ifa)) { |
| 272 | ifap1 = &ifa->ifa_next; |
Jamal Hadi Salim | 0ff60a4 | 2005-11-22 14:47:37 -0800 | [diff] [blame] | 273 | prev_prom = ifa; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | continue; |
| 275 | } |
| 276 | |
Jamal Hadi Salim | 0ff60a4 | 2005-11-22 14:47:37 -0800 | [diff] [blame] | 277 | if (!do_promote) { |
Harald Welte | 8f937c6 | 2005-05-29 20:23:46 -0700 | [diff] [blame] | 278 | *ifap1 = ifa->ifa_next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 280 | rtmsg_ifa(RTM_DELADDR, ifa, nlh, pid); |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 281 | blocking_notifier_call_chain(&inetaddr_chain, |
| 282 | NETDEV_DOWN, ifa); |
Harald Welte | 8f937c6 | 2005-05-29 20:23:46 -0700 | [diff] [blame] | 283 | inet_free_ifa(ifa); |
| 284 | } else { |
| 285 | promote = ifa; |
| 286 | break; |
| 287 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | } |
| 289 | } |
| 290 | |
| 291 | /* 2. Unlink it */ |
| 292 | |
| 293 | *ifap = ifa1->ifa_next; |
| 294 | |
| 295 | /* 3. Announce address deletion */ |
| 296 | |
| 297 | /* Send message first, then call notifier. |
| 298 | At first sight, FIB update triggered by notifier |
| 299 | will refer to already deleted ifaddr, that could confuse |
| 300 | netlink listeners. It is not true: look, gated sees |
| 301 | that route deleted and if it still thinks that ifaddr |
| 302 | is valid, it will try to restore deleted routes... Grr. |
| 303 | So that, this order is correct. |
| 304 | */ |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 305 | rtmsg_ifa(RTM_DELADDR, ifa1, nlh, pid); |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 306 | blocking_notifier_call_chain(&inetaddr_chain, NETDEV_DOWN, ifa1); |
Jamal Hadi Salim | 0ff60a4 | 2005-11-22 14:47:37 -0800 | [diff] [blame] | 307 | |
| 308 | if (promote) { |
| 309 | |
| 310 | if (prev_prom) { |
| 311 | prev_prom->ifa_next = promote->ifa_next; |
| 312 | promote->ifa_next = last_prim->ifa_next; |
| 313 | last_prim->ifa_next = promote; |
| 314 | } |
| 315 | |
| 316 | promote->ifa_flags &= ~IFA_F_SECONDARY; |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 317 | rtmsg_ifa(RTM_NEWADDR, promote, nlh, pid); |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 318 | blocking_notifier_call_chain(&inetaddr_chain, |
| 319 | NETDEV_UP, promote); |
Jamal Hadi Salim | 0ff60a4 | 2005-11-22 14:47:37 -0800 | [diff] [blame] | 320 | for (ifa = promote->ifa_next; ifa; ifa = ifa->ifa_next) { |
| 321 | if (ifa1->ifa_mask != ifa->ifa_mask || |
| 322 | !inet_ifa_match(ifa1->ifa_address, ifa)) |
| 323 | continue; |
| 324 | fib_add_ifaddr(ifa); |
| 325 | } |
| 326 | |
| 327 | } |
Herbert Xu | 6363097 | 2007-06-07 18:35:38 -0700 | [diff] [blame] | 328 | if (destroy) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | inet_free_ifa(ifa1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | } |
| 331 | |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 332 | static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, |
| 333 | int destroy) |
| 334 | { |
| 335 | __inet_del_ifa(in_dev, ifap, destroy, NULL, 0); |
| 336 | } |
| 337 | |
| 338 | static int __inet_insert_ifa(struct in_ifaddr *ifa, struct nlmsghdr *nlh, |
| 339 | u32 pid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | { |
| 341 | struct in_device *in_dev = ifa->ifa_dev; |
| 342 | struct in_ifaddr *ifa1, **ifap, **last_primary; |
| 343 | |
| 344 | ASSERT_RTNL(); |
| 345 | |
| 346 | if (!ifa->ifa_local) { |
| 347 | inet_free_ifa(ifa); |
| 348 | return 0; |
| 349 | } |
| 350 | |
| 351 | ifa->ifa_flags &= ~IFA_F_SECONDARY; |
| 352 | last_primary = &in_dev->ifa_list; |
| 353 | |
| 354 | for (ifap = &in_dev->ifa_list; (ifa1 = *ifap) != NULL; |
| 355 | ifap = &ifa1->ifa_next) { |
| 356 | if (!(ifa1->ifa_flags & IFA_F_SECONDARY) && |
| 357 | ifa->ifa_scope <= ifa1->ifa_scope) |
| 358 | last_primary = &ifa1->ifa_next; |
| 359 | if (ifa1->ifa_mask == ifa->ifa_mask && |
| 360 | inet_ifa_match(ifa1->ifa_address, ifa)) { |
| 361 | if (ifa1->ifa_local == ifa->ifa_local) { |
| 362 | inet_free_ifa(ifa); |
| 363 | return -EEXIST; |
| 364 | } |
| 365 | if (ifa1->ifa_scope != ifa->ifa_scope) { |
| 366 | inet_free_ifa(ifa); |
| 367 | return -EINVAL; |
| 368 | } |
| 369 | ifa->ifa_flags |= IFA_F_SECONDARY; |
| 370 | } |
| 371 | } |
| 372 | |
| 373 | if (!(ifa->ifa_flags & IFA_F_SECONDARY)) { |
| 374 | net_srandom(ifa->ifa_local); |
| 375 | ifap = last_primary; |
| 376 | } |
| 377 | |
| 378 | ifa->ifa_next = *ifap; |
| 379 | *ifap = ifa; |
| 380 | |
| 381 | /* Send message first, then call notifier. |
| 382 | Notifier will trigger FIB update, so that |
| 383 | listeners of netlink will know about new ifaddr */ |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 384 | rtmsg_ifa(RTM_NEWADDR, ifa, nlh, pid); |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 385 | blocking_notifier_call_chain(&inetaddr_chain, NETDEV_UP, ifa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | |
| 387 | return 0; |
| 388 | } |
| 389 | |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 390 | static int inet_insert_ifa(struct in_ifaddr *ifa) |
| 391 | { |
| 392 | return __inet_insert_ifa(ifa, NULL, 0); |
| 393 | } |
| 394 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | static int inet_set_ifa(struct net_device *dev, struct in_ifaddr *ifa) |
| 396 | { |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 397 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | |
| 399 | ASSERT_RTNL(); |
| 400 | |
| 401 | if (!in_dev) { |
Herbert Xu | 71e27da | 2007-06-04 23:36:06 -0700 | [diff] [blame] | 402 | inet_free_ifa(ifa); |
| 403 | return -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | } |
Herbert Xu | 71e27da | 2007-06-04 23:36:06 -0700 | [diff] [blame] | 405 | ipv4_devconf_setall(in_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | if (ifa->ifa_dev != in_dev) { |
| 407 | BUG_TRAP(!ifa->ifa_dev); |
| 408 | in_dev_hold(in_dev); |
| 409 | ifa->ifa_dev = in_dev; |
| 410 | } |
| 411 | if (LOOPBACK(ifa->ifa_local)) |
| 412 | ifa->ifa_scope = RT_SCOPE_HOST; |
| 413 | return inet_insert_ifa(ifa); |
| 414 | } |
| 415 | |
| 416 | struct in_device *inetdev_by_index(int ifindex) |
| 417 | { |
| 418 | struct net_device *dev; |
| 419 | struct in_device *in_dev = NULL; |
| 420 | read_lock(&dev_base_lock); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 421 | dev = __dev_get_by_index(&init_net, ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | if (dev) |
| 423 | in_dev = in_dev_get(dev); |
| 424 | read_unlock(&dev_base_lock); |
| 425 | return in_dev; |
| 426 | } |
| 427 | |
| 428 | /* Called only from RTNL semaphored context. No locks. */ |
| 429 | |
Al Viro | 60cad5d | 2006-09-26 22:17:09 -0700 | [diff] [blame] | 430 | struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, |
| 431 | __be32 mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | { |
| 433 | ASSERT_RTNL(); |
| 434 | |
| 435 | for_primary_ifa(in_dev) { |
| 436 | if (ifa->ifa_mask == mask && inet_ifa_match(prefix, ifa)) |
| 437 | return ifa; |
| 438 | } endfor_ifa(in_dev); |
| 439 | return NULL; |
| 440 | } |
| 441 | |
| 442 | static int inet_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
| 443 | { |
Thomas Graf | dfdd5fd | 2006-08-04 23:04:17 -0700 | [diff] [blame] | 444 | struct nlattr *tb[IFA_MAX+1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | struct in_device *in_dev; |
Thomas Graf | dfdd5fd | 2006-08-04 23:04:17 -0700 | [diff] [blame] | 446 | struct ifaddrmsg *ifm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | struct in_ifaddr *ifa, **ifap; |
Thomas Graf | dfdd5fd | 2006-08-04 23:04:17 -0700 | [diff] [blame] | 448 | int err = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | |
| 450 | ASSERT_RTNL(); |
| 451 | |
Thomas Graf | dfdd5fd | 2006-08-04 23:04:17 -0700 | [diff] [blame] | 452 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv4_policy); |
| 453 | if (err < 0) |
| 454 | goto errout; |
| 455 | |
| 456 | ifm = nlmsg_data(nlh); |
| 457 | in_dev = inetdev_by_index(ifm->ifa_index); |
| 458 | if (in_dev == NULL) { |
| 459 | err = -ENODEV; |
| 460 | goto errout; |
| 461 | } |
| 462 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | __in_dev_put(in_dev); |
| 464 | |
| 465 | for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL; |
| 466 | ifap = &ifa->ifa_next) { |
Thomas Graf | dfdd5fd | 2006-08-04 23:04:17 -0700 | [diff] [blame] | 467 | if (tb[IFA_LOCAL] && |
Al Viro | a7a628c | 2006-09-26 22:16:43 -0700 | [diff] [blame] | 468 | ifa->ifa_local != nla_get_be32(tb[IFA_LOCAL])) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | continue; |
Thomas Graf | dfdd5fd | 2006-08-04 23:04:17 -0700 | [diff] [blame] | 470 | |
| 471 | if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label)) |
| 472 | continue; |
| 473 | |
| 474 | if (tb[IFA_ADDRESS] && |
| 475 | (ifm->ifa_prefixlen != ifa->ifa_prefixlen || |
Al Viro | a7a628c | 2006-09-26 22:16:43 -0700 | [diff] [blame] | 476 | !inet_ifa_match(nla_get_be32(tb[IFA_ADDRESS]), ifa))) |
Thomas Graf | dfdd5fd | 2006-08-04 23:04:17 -0700 | [diff] [blame] | 477 | continue; |
| 478 | |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 479 | __inet_del_ifa(in_dev, ifap, 1, nlh, NETLINK_CB(skb).pid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | return 0; |
| 481 | } |
Thomas Graf | dfdd5fd | 2006-08-04 23:04:17 -0700 | [diff] [blame] | 482 | |
| 483 | err = -EADDRNOTAVAIL; |
| 484 | errout: |
| 485 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | } |
| 487 | |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 488 | static struct in_ifaddr *rtm_to_ifaddr(struct nlmsghdr *nlh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | { |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 490 | struct nlattr *tb[IFA_MAX+1]; |
| 491 | struct in_ifaddr *ifa; |
| 492 | struct ifaddrmsg *ifm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | struct net_device *dev; |
| 494 | struct in_device *in_dev; |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 495 | int err = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 497 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv4_policy); |
| 498 | if (err < 0) |
| 499 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 501 | ifm = nlmsg_data(nlh); |
Evgeniy Polyakov | c4e38f4 | 2007-03-09 13:43:24 -0800 | [diff] [blame] | 502 | if (ifm->ifa_prefixlen > 32 || tb[IFA_LOCAL] == NULL) { |
| 503 | err = -EINVAL; |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 504 | goto errout; |
Evgeniy Polyakov | c4e38f4 | 2007-03-09 13:43:24 -0800 | [diff] [blame] | 505 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 507 | dev = __dev_get_by_index(&init_net, ifm->ifa_index); |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 508 | if (dev == NULL) { |
| 509 | err = -ENODEV; |
| 510 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | } |
| 512 | |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 513 | in_dev = __in_dev_get_rtnl(dev); |
| 514 | if (in_dev == NULL) { |
Herbert Xu | 71e27da | 2007-06-04 23:36:06 -0700 | [diff] [blame] | 515 | err = -ENOBUFS; |
| 516 | goto errout; |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 517 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | |
Herbert Xu | 71e27da | 2007-06-04 23:36:06 -0700 | [diff] [blame] | 519 | ipv4_devconf_setall(in_dev); |
| 520 | |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 521 | ifa = inet_alloc_ifa(); |
| 522 | if (ifa == NULL) { |
| 523 | /* |
| 524 | * A potential indev allocation can be left alive, it stays |
| 525 | * assigned to its device and is destroy with it. |
| 526 | */ |
| 527 | err = -ENOBUFS; |
| 528 | goto errout; |
| 529 | } |
| 530 | |
| 531 | in_dev_hold(in_dev); |
| 532 | |
| 533 | if (tb[IFA_ADDRESS] == NULL) |
| 534 | tb[IFA_ADDRESS] = tb[IFA_LOCAL]; |
| 535 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | ifa->ifa_prefixlen = ifm->ifa_prefixlen; |
| 537 | ifa->ifa_mask = inet_make_mask(ifm->ifa_prefixlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | ifa->ifa_flags = ifm->ifa_flags; |
| 539 | ifa->ifa_scope = ifm->ifa_scope; |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 540 | ifa->ifa_dev = in_dev; |
| 541 | |
Al Viro | a7a628c | 2006-09-26 22:16:43 -0700 | [diff] [blame] | 542 | ifa->ifa_local = nla_get_be32(tb[IFA_LOCAL]); |
| 543 | ifa->ifa_address = nla_get_be32(tb[IFA_ADDRESS]); |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 544 | |
| 545 | if (tb[IFA_BROADCAST]) |
Al Viro | a7a628c | 2006-09-26 22:16:43 -0700 | [diff] [blame] | 546 | ifa->ifa_broadcast = nla_get_be32(tb[IFA_BROADCAST]); |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 547 | |
| 548 | if (tb[IFA_ANYCAST]) |
Al Viro | a7a628c | 2006-09-26 22:16:43 -0700 | [diff] [blame] | 549 | ifa->ifa_anycast = nla_get_be32(tb[IFA_ANYCAST]); |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 550 | |
| 551 | if (tb[IFA_LABEL]) |
| 552 | nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | else |
| 554 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
| 555 | |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 556 | return ifa; |
| 557 | |
| 558 | errout: |
| 559 | return ERR_PTR(err); |
| 560 | } |
| 561 | |
| 562 | static int inet_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
| 563 | { |
| 564 | struct in_ifaddr *ifa; |
| 565 | |
| 566 | ASSERT_RTNL(); |
| 567 | |
| 568 | ifa = rtm_to_ifaddr(nlh); |
| 569 | if (IS_ERR(ifa)) |
| 570 | return PTR_ERR(ifa); |
| 571 | |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 572 | return __inet_insert_ifa(ifa, nlh, NETLINK_CB(skb).pid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | } |
| 574 | |
| 575 | /* |
| 576 | * Determine a default network mask, based on the IP address. |
| 577 | */ |
| 578 | |
Al Viro | 714e85b | 2006-11-14 20:51:49 -0800 | [diff] [blame] | 579 | static __inline__ int inet_abc_len(__be32 addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | { |
| 581 | int rc = -1; /* Something else, probably a multicast. */ |
| 582 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 583 | if (ZERONET(addr)) |
| 584 | rc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | else { |
Al Viro | 714e85b | 2006-11-14 20:51:49 -0800 | [diff] [blame] | 586 | __u32 haddr = ntohl(addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | |
Al Viro | 714e85b | 2006-11-14 20:51:49 -0800 | [diff] [blame] | 588 | if (IN_CLASSA(haddr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | rc = 8; |
Al Viro | 714e85b | 2006-11-14 20:51:49 -0800 | [diff] [blame] | 590 | else if (IN_CLASSB(haddr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | rc = 16; |
Al Viro | 714e85b | 2006-11-14 20:51:49 -0800 | [diff] [blame] | 592 | else if (IN_CLASSC(haddr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | rc = 24; |
| 594 | } |
| 595 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 596 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | } |
| 598 | |
| 599 | |
| 600 | int devinet_ioctl(unsigned int cmd, void __user *arg) |
| 601 | { |
| 602 | struct ifreq ifr; |
| 603 | struct sockaddr_in sin_orig; |
| 604 | struct sockaddr_in *sin = (struct sockaddr_in *)&ifr.ifr_addr; |
| 605 | struct in_device *in_dev; |
| 606 | struct in_ifaddr **ifap = NULL; |
| 607 | struct in_ifaddr *ifa = NULL; |
| 608 | struct net_device *dev; |
| 609 | char *colon; |
| 610 | int ret = -EFAULT; |
| 611 | int tryaddrmatch = 0; |
| 612 | |
| 613 | /* |
| 614 | * Fetch the caller's info block into kernel space |
| 615 | */ |
| 616 | |
| 617 | if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) |
| 618 | goto out; |
| 619 | ifr.ifr_name[IFNAMSIZ - 1] = 0; |
| 620 | |
| 621 | /* save original address for comparison */ |
| 622 | memcpy(&sin_orig, sin, sizeof(*sin)); |
| 623 | |
| 624 | colon = strchr(ifr.ifr_name, ':'); |
| 625 | if (colon) |
| 626 | *colon = 0; |
| 627 | |
| 628 | #ifdef CONFIG_KMOD |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 629 | dev_load(&init_net, ifr.ifr_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | #endif |
| 631 | |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 632 | switch (cmd) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | case SIOCGIFADDR: /* Get interface address */ |
| 634 | case SIOCGIFBRDADDR: /* Get the broadcast address */ |
| 635 | case SIOCGIFDSTADDR: /* Get the destination address */ |
| 636 | case SIOCGIFNETMASK: /* Get the netmask for the interface */ |
| 637 | /* Note that these ioctls will not sleep, |
| 638 | so that we do not impose a lock. |
| 639 | One day we will be forced to put shlock here (I mean SMP) |
| 640 | */ |
| 641 | tryaddrmatch = (sin_orig.sin_family == AF_INET); |
| 642 | memset(sin, 0, sizeof(*sin)); |
| 643 | sin->sin_family = AF_INET; |
| 644 | break; |
| 645 | |
| 646 | case SIOCSIFFLAGS: |
| 647 | ret = -EACCES; |
| 648 | if (!capable(CAP_NET_ADMIN)) |
| 649 | goto out; |
| 650 | break; |
| 651 | case SIOCSIFADDR: /* Set interface address (and family) */ |
| 652 | case SIOCSIFBRDADDR: /* Set the broadcast address */ |
| 653 | case SIOCSIFDSTADDR: /* Set the destination address */ |
| 654 | case SIOCSIFNETMASK: /* Set the netmask for the interface */ |
| 655 | ret = -EACCES; |
| 656 | if (!capable(CAP_NET_ADMIN)) |
| 657 | goto out; |
| 658 | ret = -EINVAL; |
| 659 | if (sin->sin_family != AF_INET) |
| 660 | goto out; |
| 661 | break; |
| 662 | default: |
| 663 | ret = -EINVAL; |
| 664 | goto out; |
| 665 | } |
| 666 | |
| 667 | rtnl_lock(); |
| 668 | |
| 669 | ret = -ENODEV; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 670 | if ((dev = __dev_get_by_name(&init_net, ifr.ifr_name)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | goto done; |
| 672 | |
| 673 | if (colon) |
| 674 | *colon = ':'; |
| 675 | |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 676 | if ((in_dev = __in_dev_get_rtnl(dev)) != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | if (tryaddrmatch) { |
| 678 | /* Matthias Andree */ |
| 679 | /* compare label and address (4.4BSD style) */ |
| 680 | /* note: we only do this for a limited set of ioctls |
| 681 | and only if the original address family was AF_INET. |
| 682 | This is checked above. */ |
| 683 | for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL; |
| 684 | ifap = &ifa->ifa_next) { |
| 685 | if (!strcmp(ifr.ifr_name, ifa->ifa_label) && |
| 686 | sin_orig.sin_addr.s_addr == |
| 687 | ifa->ifa_address) { |
| 688 | break; /* found */ |
| 689 | } |
| 690 | } |
| 691 | } |
| 692 | /* we didn't get a match, maybe the application is |
| 693 | 4.3BSD-style and passed in junk so we fall back to |
| 694 | comparing just the label */ |
| 695 | if (!ifa) { |
| 696 | for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL; |
| 697 | ifap = &ifa->ifa_next) |
| 698 | if (!strcmp(ifr.ifr_name, ifa->ifa_label)) |
| 699 | break; |
| 700 | } |
| 701 | } |
| 702 | |
| 703 | ret = -EADDRNOTAVAIL; |
| 704 | if (!ifa && cmd != SIOCSIFADDR && cmd != SIOCSIFFLAGS) |
| 705 | goto done; |
| 706 | |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 707 | switch (cmd) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | case SIOCGIFADDR: /* Get interface address */ |
| 709 | sin->sin_addr.s_addr = ifa->ifa_local; |
| 710 | goto rarok; |
| 711 | |
| 712 | case SIOCGIFBRDADDR: /* Get the broadcast address */ |
| 713 | sin->sin_addr.s_addr = ifa->ifa_broadcast; |
| 714 | goto rarok; |
| 715 | |
| 716 | case SIOCGIFDSTADDR: /* Get the destination address */ |
| 717 | sin->sin_addr.s_addr = ifa->ifa_address; |
| 718 | goto rarok; |
| 719 | |
| 720 | case SIOCGIFNETMASK: /* Get the netmask for the interface */ |
| 721 | sin->sin_addr.s_addr = ifa->ifa_mask; |
| 722 | goto rarok; |
| 723 | |
| 724 | case SIOCSIFFLAGS: |
| 725 | if (colon) { |
| 726 | ret = -EADDRNOTAVAIL; |
| 727 | if (!ifa) |
| 728 | break; |
| 729 | ret = 0; |
| 730 | if (!(ifr.ifr_flags & IFF_UP)) |
| 731 | inet_del_ifa(in_dev, ifap, 1); |
| 732 | break; |
| 733 | } |
| 734 | ret = dev_change_flags(dev, ifr.ifr_flags); |
| 735 | break; |
| 736 | |
| 737 | case SIOCSIFADDR: /* Set interface address (and family) */ |
| 738 | ret = -EINVAL; |
| 739 | if (inet_abc_len(sin->sin_addr.s_addr) < 0) |
| 740 | break; |
| 741 | |
| 742 | if (!ifa) { |
| 743 | ret = -ENOBUFS; |
| 744 | if ((ifa = inet_alloc_ifa()) == NULL) |
| 745 | break; |
| 746 | if (colon) |
| 747 | memcpy(ifa->ifa_label, ifr.ifr_name, IFNAMSIZ); |
| 748 | else |
| 749 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
| 750 | } else { |
| 751 | ret = 0; |
| 752 | if (ifa->ifa_local == sin->sin_addr.s_addr) |
| 753 | break; |
| 754 | inet_del_ifa(in_dev, ifap, 0); |
| 755 | ifa->ifa_broadcast = 0; |
| 756 | ifa->ifa_anycast = 0; |
| 757 | } |
| 758 | |
| 759 | ifa->ifa_address = ifa->ifa_local = sin->sin_addr.s_addr; |
| 760 | |
| 761 | if (!(dev->flags & IFF_POINTOPOINT)) { |
| 762 | ifa->ifa_prefixlen = inet_abc_len(ifa->ifa_address); |
| 763 | ifa->ifa_mask = inet_make_mask(ifa->ifa_prefixlen); |
| 764 | if ((dev->flags & IFF_BROADCAST) && |
| 765 | ifa->ifa_prefixlen < 31) |
| 766 | ifa->ifa_broadcast = ifa->ifa_address | |
| 767 | ~ifa->ifa_mask; |
| 768 | } else { |
| 769 | ifa->ifa_prefixlen = 32; |
| 770 | ifa->ifa_mask = inet_make_mask(32); |
| 771 | } |
| 772 | ret = inet_set_ifa(dev, ifa); |
| 773 | break; |
| 774 | |
| 775 | case SIOCSIFBRDADDR: /* Set the broadcast address */ |
| 776 | ret = 0; |
| 777 | if (ifa->ifa_broadcast != sin->sin_addr.s_addr) { |
| 778 | inet_del_ifa(in_dev, ifap, 0); |
| 779 | ifa->ifa_broadcast = sin->sin_addr.s_addr; |
| 780 | inet_insert_ifa(ifa); |
| 781 | } |
| 782 | break; |
| 783 | |
| 784 | case SIOCSIFDSTADDR: /* Set the destination address */ |
| 785 | ret = 0; |
| 786 | if (ifa->ifa_address == sin->sin_addr.s_addr) |
| 787 | break; |
| 788 | ret = -EINVAL; |
| 789 | if (inet_abc_len(sin->sin_addr.s_addr) < 0) |
| 790 | break; |
| 791 | ret = 0; |
| 792 | inet_del_ifa(in_dev, ifap, 0); |
| 793 | ifa->ifa_address = sin->sin_addr.s_addr; |
| 794 | inet_insert_ifa(ifa); |
| 795 | break; |
| 796 | |
| 797 | case SIOCSIFNETMASK: /* Set the netmask for the interface */ |
| 798 | |
| 799 | /* |
| 800 | * The mask we set must be legal. |
| 801 | */ |
| 802 | ret = -EINVAL; |
| 803 | if (bad_mask(sin->sin_addr.s_addr, 0)) |
| 804 | break; |
| 805 | ret = 0; |
| 806 | if (ifa->ifa_mask != sin->sin_addr.s_addr) { |
Al Viro | a144ea4 | 2006-09-28 18:00:55 -0700 | [diff] [blame] | 807 | __be32 old_mask = ifa->ifa_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | inet_del_ifa(in_dev, ifap, 0); |
| 809 | ifa->ifa_mask = sin->sin_addr.s_addr; |
| 810 | ifa->ifa_prefixlen = inet_mask_len(ifa->ifa_mask); |
| 811 | |
| 812 | /* See if current broadcast address matches |
| 813 | * with current netmask, then recalculate |
| 814 | * the broadcast address. Otherwise it's a |
| 815 | * funny address, so don't touch it since |
| 816 | * the user seems to know what (s)he's doing... |
| 817 | */ |
| 818 | if ((dev->flags & IFF_BROADCAST) && |
| 819 | (ifa->ifa_prefixlen < 31) && |
| 820 | (ifa->ifa_broadcast == |
David Engel | dcab5e1 | 2005-10-21 22:09:16 -0500 | [diff] [blame] | 821 | (ifa->ifa_local|~old_mask))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | ifa->ifa_broadcast = (ifa->ifa_local | |
| 823 | ~sin->sin_addr.s_addr); |
| 824 | } |
| 825 | inet_insert_ifa(ifa); |
| 826 | } |
| 827 | break; |
| 828 | } |
| 829 | done: |
| 830 | rtnl_unlock(); |
| 831 | out: |
| 832 | return ret; |
| 833 | rarok: |
| 834 | rtnl_unlock(); |
| 835 | ret = copy_to_user(arg, &ifr, sizeof(struct ifreq)) ? -EFAULT : 0; |
| 836 | goto out; |
| 837 | } |
| 838 | |
| 839 | static int inet_gifconf(struct net_device *dev, char __user *buf, int len) |
| 840 | { |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 841 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | struct in_ifaddr *ifa; |
| 843 | struct ifreq ifr; |
| 844 | int done = 0; |
| 845 | |
| 846 | if (!in_dev || (ifa = in_dev->ifa_list) == NULL) |
| 847 | goto out; |
| 848 | |
| 849 | for (; ifa; ifa = ifa->ifa_next) { |
| 850 | if (!buf) { |
| 851 | done += sizeof(ifr); |
| 852 | continue; |
| 853 | } |
| 854 | if (len < (int) sizeof(ifr)) |
| 855 | break; |
| 856 | memset(&ifr, 0, sizeof(struct ifreq)); |
| 857 | if (ifa->ifa_label) |
| 858 | strcpy(ifr.ifr_name, ifa->ifa_label); |
| 859 | else |
| 860 | strcpy(ifr.ifr_name, dev->name); |
| 861 | |
| 862 | (*(struct sockaddr_in *)&ifr.ifr_addr).sin_family = AF_INET; |
| 863 | (*(struct sockaddr_in *)&ifr.ifr_addr).sin_addr.s_addr = |
| 864 | ifa->ifa_local; |
| 865 | |
| 866 | if (copy_to_user(buf, &ifr, sizeof(struct ifreq))) { |
| 867 | done = -EFAULT; |
| 868 | break; |
| 869 | } |
| 870 | buf += sizeof(struct ifreq); |
| 871 | len -= sizeof(struct ifreq); |
| 872 | done += sizeof(struct ifreq); |
| 873 | } |
| 874 | out: |
| 875 | return done; |
| 876 | } |
| 877 | |
Al Viro | a61ced5 | 2006-09-26 21:27:54 -0700 | [diff] [blame] | 878 | __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] | 879 | { |
Al Viro | a61ced5 | 2006-09-26 21:27:54 -0700 | [diff] [blame] | 880 | __be32 addr = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | struct in_device *in_dev; |
| 882 | |
| 883 | rcu_read_lock(); |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 884 | in_dev = __in_dev_get_rcu(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | if (!in_dev) |
| 886 | goto no_in_dev; |
| 887 | |
| 888 | for_primary_ifa(in_dev) { |
| 889 | if (ifa->ifa_scope > scope) |
| 890 | continue; |
| 891 | if (!dst || inet_ifa_match(dst, ifa)) { |
| 892 | addr = ifa->ifa_local; |
| 893 | break; |
| 894 | } |
| 895 | if (!addr) |
| 896 | addr = ifa->ifa_local; |
| 897 | } endfor_ifa(in_dev); |
| 898 | no_in_dev: |
| 899 | rcu_read_unlock(); |
| 900 | |
| 901 | if (addr) |
| 902 | goto out; |
| 903 | |
| 904 | /* Not loopback addresses on loopback should be preferred |
| 905 | in this case. It is importnat that lo is the first interface |
| 906 | in dev_base list. |
| 907 | */ |
| 908 | read_lock(&dev_base_lock); |
| 909 | rcu_read_lock(); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 910 | for_each_netdev(&init_net, dev) { |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 911 | if ((in_dev = __in_dev_get_rcu(dev)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | continue; |
| 913 | |
| 914 | for_primary_ifa(in_dev) { |
| 915 | if (ifa->ifa_scope != RT_SCOPE_LINK && |
| 916 | ifa->ifa_scope <= scope) { |
| 917 | addr = ifa->ifa_local; |
| 918 | goto out_unlock_both; |
| 919 | } |
| 920 | } endfor_ifa(in_dev); |
| 921 | } |
| 922 | out_unlock_both: |
| 923 | read_unlock(&dev_base_lock); |
| 924 | rcu_read_unlock(); |
| 925 | out: |
| 926 | return addr; |
| 927 | } |
| 928 | |
Al Viro | 60cad5d | 2006-09-26 22:17:09 -0700 | [diff] [blame] | 929 | static __be32 confirm_addr_indev(struct in_device *in_dev, __be32 dst, |
| 930 | __be32 local, int scope) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | { |
| 932 | int same = 0; |
Al Viro | a144ea4 | 2006-09-28 18:00:55 -0700 | [diff] [blame] | 933 | __be32 addr = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | |
| 935 | for_ifa(in_dev) { |
| 936 | if (!addr && |
| 937 | (local == ifa->ifa_local || !local) && |
| 938 | ifa->ifa_scope <= scope) { |
| 939 | addr = ifa->ifa_local; |
| 940 | if (same) |
| 941 | break; |
| 942 | } |
| 943 | if (!same) { |
| 944 | same = (!local || inet_ifa_match(local, ifa)) && |
| 945 | (!dst || inet_ifa_match(dst, ifa)); |
| 946 | if (same && addr) { |
| 947 | if (local || !dst) |
| 948 | break; |
| 949 | /* Is the selected addr into dst subnet? */ |
| 950 | if (inet_ifa_match(addr, ifa)) |
| 951 | break; |
| 952 | /* No, then can we use new local src? */ |
| 953 | if (ifa->ifa_scope <= scope) { |
| 954 | addr = ifa->ifa_local; |
| 955 | break; |
| 956 | } |
| 957 | /* search for large dst subnet for addr */ |
| 958 | same = 0; |
| 959 | } |
| 960 | } |
| 961 | } endfor_ifa(in_dev); |
| 962 | |
| 963 | return same? addr : 0; |
| 964 | } |
| 965 | |
| 966 | /* |
| 967 | * Confirm that local IP address exists using wildcards: |
| 968 | * - dev: only on this interface, 0=any interface |
| 969 | * - dst: only in the same subnet as dst, 0=any dst |
| 970 | * - local: address, 0=autoselect the local address |
| 971 | * - scope: maximum allowed scope value for the local address |
| 972 | */ |
Al Viro | 60cad5d | 2006-09-26 22:17:09 -0700 | [diff] [blame] | 973 | __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] | 974 | { |
Al Viro | 60cad5d | 2006-09-26 22:17:09 -0700 | [diff] [blame] | 975 | __be32 addr = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | struct in_device *in_dev; |
| 977 | |
| 978 | if (dev) { |
| 979 | rcu_read_lock(); |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 980 | if ((in_dev = __in_dev_get_rcu(dev))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | addr = confirm_addr_indev(in_dev, dst, local, scope); |
| 982 | rcu_read_unlock(); |
| 983 | |
| 984 | return addr; |
| 985 | } |
| 986 | |
| 987 | read_lock(&dev_base_lock); |
| 988 | rcu_read_lock(); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 989 | for_each_netdev(&init_net, dev) { |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 990 | if ((in_dev = __in_dev_get_rcu(dev))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | addr = confirm_addr_indev(in_dev, dst, local, scope); |
| 992 | if (addr) |
| 993 | break; |
| 994 | } |
| 995 | } |
| 996 | rcu_read_unlock(); |
| 997 | read_unlock(&dev_base_lock); |
| 998 | |
| 999 | return addr; |
| 1000 | } |
| 1001 | |
| 1002 | /* |
| 1003 | * Device notifier |
| 1004 | */ |
| 1005 | |
| 1006 | int register_inetaddr_notifier(struct notifier_block *nb) |
| 1007 | { |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 1008 | return blocking_notifier_chain_register(&inetaddr_chain, nb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | } |
| 1010 | |
| 1011 | int unregister_inetaddr_notifier(struct notifier_block *nb) |
| 1012 | { |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 1013 | return blocking_notifier_chain_unregister(&inetaddr_chain, nb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | } |
| 1015 | |
| 1016 | /* Rename ifa_labels for a device name change. Make some effort to preserve existing |
| 1017 | * alias numbering and to create unique labels if possible. |
| 1018 | */ |
| 1019 | 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] | 1020 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | struct in_ifaddr *ifa; |
| 1022 | int named = 0; |
| 1023 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1024 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { |
| 1025 | char old[IFNAMSIZ], *dot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | |
| 1027 | memcpy(old, ifa->ifa_label, IFNAMSIZ); |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1028 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | if (named++ == 0) |
| 1030 | continue; |
| 1031 | dot = strchr(ifa->ifa_label, ':'); |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1032 | if (dot == NULL) { |
| 1033 | sprintf(old, ":%d", named); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | dot = old; |
| 1035 | } |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1036 | if (strlen(dot) + strlen(dev->name) < IFNAMSIZ) { |
| 1037 | strcat(ifa->ifa_label, dot); |
| 1038 | } else { |
| 1039 | strcpy(ifa->ifa_label + (IFNAMSIZ - strlen(dot) - 1), dot); |
| 1040 | } |
| 1041 | } |
| 1042 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | |
| 1044 | /* Called only under RTNL semaphore */ |
| 1045 | |
| 1046 | static int inetdev_event(struct notifier_block *this, unsigned long event, |
| 1047 | void *ptr) |
| 1048 | { |
| 1049 | struct net_device *dev = ptr; |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 1050 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | |
Eric W. Biederman | e9dc865 | 2007-09-12 13:02:17 +0200 | [diff] [blame] | 1052 | if (dev->nd_net != &init_net) |
| 1053 | return NOTIFY_DONE; |
| 1054 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | ASSERT_RTNL(); |
| 1056 | |
| 1057 | if (!in_dev) { |
Herbert Xu | 8030f54 | 2007-02-22 01:53:47 +0900 | [diff] [blame] | 1058 | if (event == NETDEV_REGISTER) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | in_dev = inetdev_init(dev); |
Herbert Xu | b217d61 | 2007-07-30 17:04:52 -0700 | [diff] [blame] | 1060 | if (!in_dev) |
| 1061 | return notifier_from_errno(-ENOMEM); |
Eric W. Biederman | 0cc217e | 2007-09-26 22:10:06 -0700 | [diff] [blame] | 1062 | if (dev->flags & IFF_LOOPBACK) { |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 1063 | IN_DEV_CONF_SET(in_dev, NOXFRM, 1); |
| 1064 | IN_DEV_CONF_SET(in_dev, NOPOLICY, 1); |
Herbert Xu | 8030f54 | 2007-02-22 01:53:47 +0900 | [diff] [blame] | 1065 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | } |
| 1067 | goto out; |
| 1068 | } |
| 1069 | |
| 1070 | switch (event) { |
| 1071 | case NETDEV_REGISTER: |
| 1072 | printk(KERN_DEBUG "inetdev_event: bug\n"); |
| 1073 | dev->ip_ptr = NULL; |
| 1074 | break; |
| 1075 | case NETDEV_UP: |
| 1076 | if (dev->mtu < 68) |
| 1077 | break; |
Eric W. Biederman | 0cc217e | 2007-09-26 22:10:06 -0700 | [diff] [blame] | 1078 | if (dev->flags & IFF_LOOPBACK) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | struct in_ifaddr *ifa; |
| 1080 | if ((ifa = inet_alloc_ifa()) != NULL) { |
| 1081 | ifa->ifa_local = |
| 1082 | ifa->ifa_address = htonl(INADDR_LOOPBACK); |
| 1083 | ifa->ifa_prefixlen = 8; |
| 1084 | ifa->ifa_mask = inet_make_mask(8); |
| 1085 | in_dev_hold(in_dev); |
| 1086 | ifa->ifa_dev = in_dev; |
| 1087 | ifa->ifa_scope = RT_SCOPE_HOST; |
| 1088 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
| 1089 | inet_insert_ifa(ifa); |
| 1090 | } |
| 1091 | } |
| 1092 | ip_mc_up(in_dev); |
| 1093 | break; |
| 1094 | case NETDEV_DOWN: |
| 1095 | ip_mc_down(in_dev); |
| 1096 | break; |
| 1097 | case NETDEV_CHANGEMTU: |
| 1098 | if (dev->mtu >= 68) |
| 1099 | break; |
| 1100 | /* MTU falled under 68, disable IP */ |
| 1101 | case NETDEV_UNREGISTER: |
| 1102 | inetdev_destroy(in_dev); |
| 1103 | break; |
| 1104 | case NETDEV_CHANGENAME: |
| 1105 | /* Do not notify about label change, this event is |
| 1106 | * not interesting to applications using netlink. |
| 1107 | */ |
| 1108 | inetdev_changename(dev, in_dev); |
| 1109 | |
| 1110 | #ifdef CONFIG_SYSCTL |
| 1111 | devinet_sysctl_unregister(&in_dev->cnf); |
| 1112 | neigh_sysctl_unregister(in_dev->arp_parms); |
| 1113 | neigh_sysctl_register(dev, in_dev->arp_parms, NET_IPV4, |
| 1114 | NET_IPV4_NEIGH, "ipv4", NULL, NULL); |
| 1115 | devinet_sysctl_register(in_dev, &in_dev->cnf); |
| 1116 | #endif |
| 1117 | break; |
| 1118 | } |
| 1119 | out: |
| 1120 | return NOTIFY_DONE; |
| 1121 | } |
| 1122 | |
| 1123 | static struct notifier_block ip_netdev_notifier = { |
| 1124 | .notifier_call =inetdev_event, |
| 1125 | }; |
| 1126 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 1127 | static inline size_t inet_nlmsg_size(void) |
| 1128 | { |
| 1129 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
| 1130 | + nla_total_size(4) /* IFA_ADDRESS */ |
| 1131 | + nla_total_size(4) /* IFA_LOCAL */ |
| 1132 | + nla_total_size(4) /* IFA_BROADCAST */ |
| 1133 | + nla_total_size(4) /* IFA_ANYCAST */ |
| 1134 | + nla_total_size(IFNAMSIZ); /* IFA_LABEL */ |
| 1135 | } |
| 1136 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | 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] | 1138 | u32 pid, u32 seq, int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | { |
| 1140 | struct ifaddrmsg *ifm; |
| 1141 | struct nlmsghdr *nlh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | |
Thomas Graf | 47f6851 | 2006-08-04 23:04:36 -0700 | [diff] [blame] | 1143 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), flags); |
| 1144 | if (nlh == NULL) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 1145 | return -EMSGSIZE; |
Thomas Graf | 47f6851 | 2006-08-04 23:04:36 -0700 | [diff] [blame] | 1146 | |
| 1147 | ifm = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | ifm->ifa_family = AF_INET; |
| 1149 | ifm->ifa_prefixlen = ifa->ifa_prefixlen; |
| 1150 | ifm->ifa_flags = ifa->ifa_flags|IFA_F_PERMANENT; |
| 1151 | ifm->ifa_scope = ifa->ifa_scope; |
| 1152 | ifm->ifa_index = ifa->ifa_dev->dev->ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | |
Thomas Graf | 47f6851 | 2006-08-04 23:04:36 -0700 | [diff] [blame] | 1154 | if (ifa->ifa_address) |
Al Viro | a7a628c | 2006-09-26 22:16:43 -0700 | [diff] [blame] | 1155 | NLA_PUT_BE32(skb, IFA_ADDRESS, ifa->ifa_address); |
Thomas Graf | 47f6851 | 2006-08-04 23:04:36 -0700 | [diff] [blame] | 1156 | |
| 1157 | if (ifa->ifa_local) |
Al Viro | a7a628c | 2006-09-26 22:16:43 -0700 | [diff] [blame] | 1158 | NLA_PUT_BE32(skb, IFA_LOCAL, ifa->ifa_local); |
Thomas Graf | 47f6851 | 2006-08-04 23:04:36 -0700 | [diff] [blame] | 1159 | |
| 1160 | if (ifa->ifa_broadcast) |
Al Viro | a7a628c | 2006-09-26 22:16:43 -0700 | [diff] [blame] | 1161 | NLA_PUT_BE32(skb, IFA_BROADCAST, ifa->ifa_broadcast); |
Thomas Graf | 47f6851 | 2006-08-04 23:04:36 -0700 | [diff] [blame] | 1162 | |
| 1163 | if (ifa->ifa_anycast) |
Al Viro | a7a628c | 2006-09-26 22:16:43 -0700 | [diff] [blame] | 1164 | NLA_PUT_BE32(skb, IFA_ANYCAST, ifa->ifa_anycast); |
Thomas Graf | 47f6851 | 2006-08-04 23:04:36 -0700 | [diff] [blame] | 1165 | |
| 1166 | if (ifa->ifa_label[0]) |
| 1167 | NLA_PUT_STRING(skb, IFA_LABEL, ifa->ifa_label); |
| 1168 | |
| 1169 | return nlmsg_end(skb, nlh); |
| 1170 | |
| 1171 | nla_put_failure: |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 1172 | nlmsg_cancel(skb, nlh); |
| 1173 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | } |
| 1175 | |
| 1176 | static int inet_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) |
| 1177 | { |
| 1178 | int idx, ip_idx; |
| 1179 | struct net_device *dev; |
| 1180 | struct in_device *in_dev; |
| 1181 | struct in_ifaddr *ifa; |
| 1182 | int s_ip_idx, s_idx = cb->args[0]; |
| 1183 | |
| 1184 | s_ip_idx = ip_idx = cb->args[1]; |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1185 | idx = 0; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1186 | for_each_netdev(&init_net, dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1187 | if (idx < s_idx) |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1188 | goto cont; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1189 | if (idx > s_idx) |
| 1190 | s_ip_idx = 0; |
Patrick McHardy | 6313c1e | 2007-04-16 17:00:53 -0700 | [diff] [blame] | 1191 | if ((in_dev = __in_dev_get_rtnl(dev)) == NULL) |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1192 | goto cont; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) |
Stephen Hemminger | 596e415 | 2007-09-11 10:41:04 +0200 | [diff] [blame] | 1197 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | if (inet_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid, |
| 1199 | cb->nlh->nlmsg_seq, |
Patrick McHardy | 6313c1e | 2007-04-16 17:00:53 -0700 | [diff] [blame] | 1200 | RTM_NEWADDR, NLM_F_MULTI) <= 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | } |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1203 | cont: |
| 1204 | idx++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | } |
| 1206 | |
| 1207 | done: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1208 | cb->args[0] = idx; |
| 1209 | cb->args[1] = ip_idx; |
| 1210 | |
| 1211 | return skb->len; |
| 1212 | } |
| 1213 | |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 1214 | static void rtmsg_ifa(int event, struct in_ifaddr* ifa, struct nlmsghdr *nlh, |
| 1215 | u32 pid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | { |
Thomas Graf | 47f6851 | 2006-08-04 23:04:36 -0700 | [diff] [blame] | 1217 | struct sk_buff *skb; |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 1218 | u32 seq = nlh ? nlh->nlmsg_seq : 0; |
| 1219 | int err = -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 1221 | skb = nlmsg_new(inet_nlmsg_size(), GFP_KERNEL); |
Thomas Graf | 47f6851 | 2006-08-04 23:04:36 -0700 | [diff] [blame] | 1222 | if (skb == NULL) |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 1223 | goto errout; |
| 1224 | |
| 1225 | err = inet_fill_ifaddr(skb, ifa, pid, seq, event, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 1226 | if (err < 0) { |
| 1227 | /* -EMSGSIZE implies BUG in inet_nlmsg_size() */ |
| 1228 | WARN_ON(err == -EMSGSIZE); |
| 1229 | kfree_skb(skb); |
| 1230 | goto errout; |
| 1231 | } |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 1232 | err = rtnl_notify(skb, pid, RTNLGRP_IPV4_IFADDR, nlh, GFP_KERNEL); |
| 1233 | errout: |
| 1234 | if (err < 0) |
| 1235 | rtnl_set_sk_err(RTNLGRP_IPV4_IFADDR, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | } |
| 1237 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1238 | #ifdef CONFIG_SYSCTL |
| 1239 | |
Herbert Xu | 31be308 | 2007-06-04 23:35:37 -0700 | [diff] [blame] | 1240 | static void devinet_copy_dflt_conf(int i) |
| 1241 | { |
| 1242 | struct net_device *dev; |
| 1243 | |
| 1244 | read_lock(&dev_base_lock); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1245 | for_each_netdev(&init_net, dev) { |
Herbert Xu | 31be308 | 2007-06-04 23:35:37 -0700 | [diff] [blame] | 1246 | struct in_device *in_dev; |
| 1247 | rcu_read_lock(); |
| 1248 | in_dev = __in_dev_get_rcu(dev); |
| 1249 | if (in_dev && !test_bit(i, in_dev->cnf.state)) |
| 1250 | in_dev->cnf.data[i] = ipv4_devconf_dflt.data[i]; |
| 1251 | rcu_read_unlock(); |
| 1252 | } |
| 1253 | read_unlock(&dev_base_lock); |
| 1254 | } |
| 1255 | |
| 1256 | static int devinet_conf_proc(ctl_table *ctl, int write, |
| 1257 | struct file* filp, void __user *buffer, |
| 1258 | size_t *lenp, loff_t *ppos) |
| 1259 | { |
| 1260 | int ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); |
| 1261 | |
| 1262 | if (write) { |
| 1263 | struct ipv4_devconf *cnf = ctl->extra1; |
| 1264 | int i = (int *)ctl->data - cnf->data; |
| 1265 | |
| 1266 | set_bit(i, cnf->state); |
| 1267 | |
| 1268 | if (cnf == &ipv4_devconf_dflt) |
| 1269 | devinet_copy_dflt_conf(i); |
| 1270 | } |
| 1271 | |
| 1272 | return ret; |
| 1273 | } |
| 1274 | |
| 1275 | static int devinet_conf_sysctl(ctl_table *table, int __user *name, int nlen, |
| 1276 | void __user *oldval, size_t __user *oldlenp, |
| 1277 | void __user *newval, size_t newlen) |
| 1278 | { |
| 1279 | struct ipv4_devconf *cnf; |
| 1280 | int *valp = table->data; |
| 1281 | int new; |
| 1282 | int i; |
| 1283 | |
| 1284 | if (!newval || !newlen) |
| 1285 | return 0; |
| 1286 | |
| 1287 | if (newlen != sizeof(int)) |
| 1288 | return -EINVAL; |
| 1289 | |
| 1290 | if (get_user(new, (int __user *)newval)) |
| 1291 | return -EFAULT; |
| 1292 | |
| 1293 | if (new == *valp) |
| 1294 | return 0; |
| 1295 | |
| 1296 | if (oldval && oldlenp) { |
| 1297 | size_t len; |
| 1298 | |
| 1299 | if (get_user(len, oldlenp)) |
| 1300 | return -EFAULT; |
| 1301 | |
| 1302 | if (len) { |
| 1303 | if (len > table->maxlen) |
| 1304 | len = table->maxlen; |
| 1305 | if (copy_to_user(oldval, valp, len)) |
| 1306 | return -EFAULT; |
| 1307 | if (put_user(len, oldlenp)) |
| 1308 | return -EFAULT; |
| 1309 | } |
| 1310 | } |
| 1311 | |
| 1312 | *valp = new; |
| 1313 | |
| 1314 | cnf = table->extra1; |
| 1315 | i = (int *)table->data - cnf->data; |
| 1316 | |
| 1317 | set_bit(i, cnf->state); |
| 1318 | |
| 1319 | if (cnf == &ipv4_devconf_dflt) |
| 1320 | devinet_copy_dflt_conf(i); |
| 1321 | |
| 1322 | return 1; |
| 1323 | } |
| 1324 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1325 | void inet_forward_change(void) |
| 1326 | { |
| 1327 | struct net_device *dev; |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 1328 | int on = IPV4_DEVCONF_ALL(FORWARDING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 1330 | IPV4_DEVCONF_ALL(ACCEPT_REDIRECTS) = !on; |
| 1331 | IPV4_DEVCONF_DFLT(FORWARDING) = on; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1332 | |
| 1333 | read_lock(&dev_base_lock); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1334 | for_each_netdev(&init_net, dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1335 | struct in_device *in_dev; |
| 1336 | rcu_read_lock(); |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 1337 | in_dev = __in_dev_get_rcu(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | if (in_dev) |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 1339 | IN_DEV_CONF_SET(in_dev, FORWARDING, on); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | rcu_read_unlock(); |
| 1341 | } |
| 1342 | read_unlock(&dev_base_lock); |
| 1343 | |
| 1344 | rt_cache_flush(0); |
| 1345 | } |
| 1346 | |
| 1347 | static int devinet_sysctl_forward(ctl_table *ctl, int write, |
| 1348 | struct file* filp, void __user *buffer, |
| 1349 | size_t *lenp, loff_t *ppos) |
| 1350 | { |
| 1351 | int *valp = ctl->data; |
| 1352 | int val = *valp; |
| 1353 | int ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); |
| 1354 | |
| 1355 | if (write && *valp != val) { |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 1356 | if (valp == &IPV4_DEVCONF_ALL(FORWARDING)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | inet_forward_change(); |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 1358 | else if (valp != &IPV4_DEVCONF_DFLT(FORWARDING)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | rt_cache_flush(0); |
| 1360 | } |
| 1361 | |
| 1362 | return ret; |
| 1363 | } |
| 1364 | |
| 1365 | int ipv4_doint_and_flush(ctl_table *ctl, int write, |
| 1366 | struct file* filp, void __user *buffer, |
| 1367 | size_t *lenp, loff_t *ppos) |
| 1368 | { |
| 1369 | int *valp = ctl->data; |
| 1370 | int val = *valp; |
| 1371 | int ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); |
| 1372 | |
| 1373 | if (write && *valp != val) |
| 1374 | rt_cache_flush(0); |
| 1375 | |
| 1376 | return ret; |
| 1377 | } |
| 1378 | |
| 1379 | int ipv4_doint_and_flush_strategy(ctl_table *table, int __user *name, int nlen, |
| 1380 | void __user *oldval, size_t __user *oldlenp, |
Alexey Dobriyan | 1f29bcd | 2006-12-10 02:19:10 -0800 | [diff] [blame] | 1381 | void __user *newval, size_t newlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1382 | { |
Herbert Xu | 31be308 | 2007-06-04 23:35:37 -0700 | [diff] [blame] | 1383 | int ret = devinet_conf_sysctl(table, name, nlen, oldval, oldlenp, |
| 1384 | newval, newlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | |
Herbert Xu | 31be308 | 2007-06-04 23:35:37 -0700 | [diff] [blame] | 1386 | if (ret == 1) |
| 1387 | rt_cache_flush(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1388 | |
Herbert Xu | 31be308 | 2007-06-04 23:35:37 -0700 | [diff] [blame] | 1389 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1390 | } |
| 1391 | |
| 1392 | |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 1393 | #define DEVINET_SYSCTL_ENTRY(attr, name, mval, proc, sysctl) \ |
| 1394 | { \ |
| 1395 | .ctl_name = NET_IPV4_CONF_ ## attr, \ |
| 1396 | .procname = name, \ |
| 1397 | .data = ipv4_devconf.data + \ |
| 1398 | NET_IPV4_CONF_ ## attr - 1, \ |
| 1399 | .maxlen = sizeof(int), \ |
| 1400 | .mode = mval, \ |
| 1401 | .proc_handler = proc, \ |
| 1402 | .strategy = sysctl, \ |
Herbert Xu | 31be308 | 2007-06-04 23:35:37 -0700 | [diff] [blame] | 1403 | .extra1 = &ipv4_devconf, \ |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 1404 | } |
| 1405 | |
| 1406 | #define DEVINET_SYSCTL_RW_ENTRY(attr, name) \ |
Herbert Xu | 31be308 | 2007-06-04 23:35:37 -0700 | [diff] [blame] | 1407 | DEVINET_SYSCTL_ENTRY(attr, name, 0644, devinet_conf_proc, \ |
| 1408 | devinet_conf_sysctl) |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 1409 | |
| 1410 | #define DEVINET_SYSCTL_RO_ENTRY(attr, name) \ |
Herbert Xu | 31be308 | 2007-06-04 23:35:37 -0700 | [diff] [blame] | 1411 | DEVINET_SYSCTL_ENTRY(attr, name, 0444, devinet_conf_proc, \ |
| 1412 | devinet_conf_sysctl) |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 1413 | |
| 1414 | #define DEVINET_SYSCTL_COMPLEX_ENTRY(attr, name, proc, sysctl) \ |
| 1415 | DEVINET_SYSCTL_ENTRY(attr, name, 0644, proc, sysctl) |
| 1416 | |
| 1417 | #define DEVINET_SYSCTL_FLUSHING_ENTRY(attr, name) \ |
| 1418 | DEVINET_SYSCTL_COMPLEX_ENTRY(attr, name, ipv4_doint_and_flush, \ |
| 1419 | ipv4_doint_and_flush_strategy) |
| 1420 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1421 | static struct devinet_sysctl_table { |
| 1422 | struct ctl_table_header *sysctl_header; |
| 1423 | ctl_table devinet_vars[__NET_IPV4_CONF_MAX]; |
| 1424 | ctl_table devinet_dev[2]; |
| 1425 | ctl_table devinet_conf_dir[2]; |
| 1426 | ctl_table devinet_proto_dir[2]; |
| 1427 | ctl_table devinet_root_dir[2]; |
| 1428 | } devinet_sysctl = { |
| 1429 | .devinet_vars = { |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 1430 | DEVINET_SYSCTL_COMPLEX_ENTRY(FORWARDING, "forwarding", |
Herbert Xu | 31be308 | 2007-06-04 23:35:37 -0700 | [diff] [blame] | 1431 | devinet_sysctl_forward, |
| 1432 | devinet_conf_sysctl), |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 1433 | DEVINET_SYSCTL_RO_ENTRY(MC_FORWARDING, "mc_forwarding"), |
| 1434 | |
| 1435 | DEVINET_SYSCTL_RW_ENTRY(ACCEPT_REDIRECTS, "accept_redirects"), |
| 1436 | DEVINET_SYSCTL_RW_ENTRY(SECURE_REDIRECTS, "secure_redirects"), |
| 1437 | DEVINET_SYSCTL_RW_ENTRY(SHARED_MEDIA, "shared_media"), |
| 1438 | DEVINET_SYSCTL_RW_ENTRY(RP_FILTER, "rp_filter"), |
| 1439 | DEVINET_SYSCTL_RW_ENTRY(SEND_REDIRECTS, "send_redirects"), |
| 1440 | DEVINET_SYSCTL_RW_ENTRY(ACCEPT_SOURCE_ROUTE, |
| 1441 | "accept_source_route"), |
| 1442 | DEVINET_SYSCTL_RW_ENTRY(PROXY_ARP, "proxy_arp"), |
| 1443 | DEVINET_SYSCTL_RW_ENTRY(MEDIUM_ID, "medium_id"), |
| 1444 | DEVINET_SYSCTL_RW_ENTRY(BOOTP_RELAY, "bootp_relay"), |
| 1445 | DEVINET_SYSCTL_RW_ENTRY(LOG_MARTIANS, "log_martians"), |
| 1446 | DEVINET_SYSCTL_RW_ENTRY(TAG, "tag"), |
| 1447 | DEVINET_SYSCTL_RW_ENTRY(ARPFILTER, "arp_filter"), |
| 1448 | DEVINET_SYSCTL_RW_ENTRY(ARP_ANNOUNCE, "arp_announce"), |
| 1449 | DEVINET_SYSCTL_RW_ENTRY(ARP_IGNORE, "arp_ignore"), |
| 1450 | DEVINET_SYSCTL_RW_ENTRY(ARP_ACCEPT, "arp_accept"), |
| 1451 | |
| 1452 | DEVINET_SYSCTL_FLUSHING_ENTRY(NOXFRM, "disable_xfrm"), |
| 1453 | DEVINET_SYSCTL_FLUSHING_ENTRY(NOPOLICY, "disable_policy"), |
| 1454 | DEVINET_SYSCTL_FLUSHING_ENTRY(FORCE_IGMP_VERSION, |
| 1455 | "force_igmp_version"), |
| 1456 | DEVINET_SYSCTL_FLUSHING_ENTRY(PROMOTE_SECONDARIES, |
| 1457 | "promote_secondaries"), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1458 | }, |
| 1459 | .devinet_dev = { |
| 1460 | { |
| 1461 | .ctl_name = NET_PROTO_CONF_ALL, |
| 1462 | .procname = "all", |
| 1463 | .mode = 0555, |
| 1464 | .child = devinet_sysctl.devinet_vars, |
| 1465 | }, |
| 1466 | }, |
| 1467 | .devinet_conf_dir = { |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1468 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1469 | .ctl_name = NET_IPV4_CONF, |
| 1470 | .procname = "conf", |
| 1471 | .mode = 0555, |
| 1472 | .child = devinet_sysctl.devinet_dev, |
| 1473 | }, |
| 1474 | }, |
| 1475 | .devinet_proto_dir = { |
| 1476 | { |
| 1477 | .ctl_name = NET_IPV4, |
| 1478 | .procname = "ipv4", |
| 1479 | .mode = 0555, |
| 1480 | .child = devinet_sysctl.devinet_conf_dir, |
| 1481 | }, |
| 1482 | }, |
| 1483 | .devinet_root_dir = { |
| 1484 | { |
| 1485 | .ctl_name = CTL_NET, |
| 1486 | .procname = "net", |
| 1487 | .mode = 0555, |
| 1488 | .child = devinet_sysctl.devinet_proto_dir, |
| 1489 | }, |
| 1490 | }, |
| 1491 | }; |
| 1492 | |
| 1493 | static void devinet_sysctl_register(struct in_device *in_dev, |
| 1494 | struct ipv4_devconf *p) |
| 1495 | { |
| 1496 | int i; |
| 1497 | struct net_device *dev = in_dev ? in_dev->dev : NULL; |
Arnaldo Carvalho de Melo | 42e5ea46 | 2006-11-17 11:18:20 -0200 | [diff] [blame] | 1498 | struct devinet_sysctl_table *t = kmemdup(&devinet_sysctl, sizeof(*t), |
| 1499 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1500 | char *dev_name = NULL; |
| 1501 | |
| 1502 | if (!t) |
| 1503 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1504 | for (i = 0; i < ARRAY_SIZE(t->devinet_vars) - 1; i++) { |
| 1505 | t->devinet_vars[i].data += (char *)p - (char *)&ipv4_devconf; |
Herbert Xu | 31be308 | 2007-06-04 23:35:37 -0700 | [diff] [blame] | 1506 | t->devinet_vars[i].extra1 = p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1507 | } |
| 1508 | |
| 1509 | if (dev) { |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1510 | dev_name = dev->name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1511 | t->devinet_dev[0].ctl_name = dev->ifindex; |
| 1512 | } else { |
| 1513 | dev_name = "default"; |
| 1514 | t->devinet_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT; |
| 1515 | } |
| 1516 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1517 | /* |
| 1518 | * Make a copy of dev_name, because '.procname' is regarded as const |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1519 | * by sysctl and we wouldn't want anyone to change it under our feet |
| 1520 | * (see SIOCSIFNAME). |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1521 | */ |
Paulo Marques | 543537b | 2005-06-23 00:09:02 -0700 | [diff] [blame] | 1522 | dev_name = kstrdup(dev_name, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1523 | if (!dev_name) |
| 1524 | goto free; |
| 1525 | |
| 1526 | t->devinet_dev[0].procname = dev_name; |
| 1527 | t->devinet_dev[0].child = t->devinet_vars; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1528 | t->devinet_conf_dir[0].child = t->devinet_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1529 | t->devinet_proto_dir[0].child = t->devinet_conf_dir; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1530 | t->devinet_root_dir[0].child = t->devinet_proto_dir; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1531 | |
Eric W. Biederman | 0b4d414 | 2007-02-14 00:34:09 -0800 | [diff] [blame] | 1532 | t->sysctl_header = register_sysctl_table(t->devinet_root_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1533 | if (!t->sysctl_header) |
| 1534 | goto free_procname; |
| 1535 | |
| 1536 | p->sysctl = t; |
| 1537 | return; |
| 1538 | |
| 1539 | /* error path */ |
| 1540 | free_procname: |
| 1541 | kfree(dev_name); |
| 1542 | free: |
| 1543 | kfree(t); |
| 1544 | return; |
| 1545 | } |
| 1546 | |
| 1547 | static void devinet_sysctl_unregister(struct ipv4_devconf *p) |
| 1548 | { |
| 1549 | if (p->sysctl) { |
| 1550 | struct devinet_sysctl_table *t = p->sysctl; |
| 1551 | p->sysctl = NULL; |
| 1552 | unregister_sysctl_table(t->sysctl_header); |
| 1553 | kfree(t->devinet_dev[0].procname); |
| 1554 | kfree(t); |
| 1555 | } |
| 1556 | } |
| 1557 | #endif |
| 1558 | |
| 1559 | void __init devinet_init(void) |
| 1560 | { |
| 1561 | register_gifconf(PF_INET, inet_gifconf); |
| 1562 | register_netdevice_notifier(&ip_netdev_notifier); |
Thomas Graf | 63f3444 | 2007-03-22 11:55:17 -0700 | [diff] [blame] | 1563 | |
| 1564 | rtnl_register(PF_INET, RTM_NEWADDR, inet_rtm_newaddr, NULL); |
| 1565 | rtnl_register(PF_INET, RTM_DELADDR, inet_rtm_deladdr, NULL); |
| 1566 | rtnl_register(PF_INET, RTM_GETADDR, NULL, inet_dump_ifaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | #ifdef CONFIG_SYSCTL |
| 1568 | devinet_sysctl.sysctl_header = |
Eric W. Biederman | 0b4d414 | 2007-02-14 00:34:09 -0800 | [diff] [blame] | 1569 | register_sysctl_table(devinet_sysctl.devinet_root_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | devinet_sysctl_register(NULL, &ipv4_devconf_dflt); |
| 1571 | #endif |
| 1572 | } |
| 1573 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1574 | EXPORT_SYMBOL(in_dev_finish_destroy); |
| 1575 | EXPORT_SYMBOL(inet_select_addr); |
| 1576 | EXPORT_SYMBOL(inetdev_by_index); |
| 1577 | EXPORT_SYMBOL(register_inetaddr_notifier); |
| 1578 | EXPORT_SYMBOL(unregister_inetaddr_notifier); |