Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * NET3 IP device support routines. |
| 3 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; either version |
| 7 | * 2 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * Derived from the IP parts of dev.c 1.0.19 |
Jesper Juhl | 02c30a8 | 2005-05-05 16:16:16 -0700 | [diff] [blame] | 10 | * Authors: Ross Biro |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
| 12 | * Mark Evans, <evansmp@uhura.aston.ac.uk> |
| 13 | * |
| 14 | * Additional Authors: |
| 15 | * Alan Cox, <gw4pts@gw4pts.ampr.org> |
| 16 | * Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
| 17 | * |
| 18 | * Changes: |
| 19 | * Alexey Kuznetsov: pa_* fields are replaced with ifaddr |
| 20 | * lists. |
| 21 | * Cyrus Durgin: updated for kmod |
| 22 | * Matthias Andree: in devinet_ioctl, compare label and |
| 23 | * address (4.4BSD alias style support), |
| 24 | * fall back to comparing just the label |
| 25 | * if no match found. |
| 26 | */ |
| 27 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
| 29 | #include <asm/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/bitops.h> |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 31 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <linux/module.h> |
| 33 | #include <linux/types.h> |
| 34 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/string.h> |
| 36 | #include <linux/mm.h> |
| 37 | #include <linux/socket.h> |
| 38 | #include <linux/sockios.h> |
| 39 | #include <linux/in.h> |
| 40 | #include <linux/errno.h> |
| 41 | #include <linux/interrupt.h> |
Thomas Graf | 1823730 | 2006-08-04 23:04:54 -0700 | [diff] [blame] | 42 | #include <linux/if_addr.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include <linux/if_ether.h> |
| 44 | #include <linux/inet.h> |
| 45 | #include <linux/netdevice.h> |
| 46 | #include <linux/etherdevice.h> |
| 47 | #include <linux/skbuff.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #include <linux/init.h> |
| 49 | #include <linux/notifier.h> |
| 50 | #include <linux/inetdevice.h> |
| 51 | #include <linux/igmp.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 52 | #include <linux/slab.h> |
David S. Miller | fd23c3b | 2011-02-18 12:42:28 -0800 | [diff] [blame] | 53 | #include <linux/hash.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | #ifdef CONFIG_SYSCTL |
| 55 | #include <linux/sysctl.h> |
| 56 | #endif |
| 57 | #include <linux/kmod.h> |
Nicolas Dichtel | edc9e74 | 2012-10-25 22:28:52 +0000 | [diff] [blame] | 58 | #include <linux/netconf.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Pavel Emelyanov | 752d14d | 2007-12-16 13:31:47 -0800 | [diff] [blame] | 65 | #include <net/net_namespace.h> |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 66 | #include <net/addrconf.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | |
David S. Miller | 406b6f9 | 2011-03-22 21:56:23 -0700 | [diff] [blame] | 68 | #include "fib_lookup.h" |
| 69 | |
Adrian Bunk | 0027ba8 | 2008-01-31 17:17:31 -0800 | [diff] [blame] | 70 | static struct ipv4_devconf ipv4_devconf = { |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 71 | .data = { |
Eric W. Biederman | 0229168 | 2010-02-14 03:25:51 +0000 | [diff] [blame] | 72 | [IPV4_DEVCONF_ACCEPT_REDIRECTS - 1] = 1, |
| 73 | [IPV4_DEVCONF_SEND_REDIRECTS - 1] = 1, |
| 74 | [IPV4_DEVCONF_SECURE_REDIRECTS - 1] = 1, |
| 75 | [IPV4_DEVCONF_SHARED_MEDIA - 1] = 1, |
William Manley | 2690048 | 2013-08-06 19:03:15 +0100 | [diff] [blame] | 76 | [IPV4_DEVCONF_IGMPV2_UNSOLICITED_REPORT_INTERVAL - 1] = 10000 /*ms*/, |
| 77 | [IPV4_DEVCONF_IGMPV3_UNSOLICITED_REPORT_INTERVAL - 1] = 1000 /*ms*/, |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 78 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | }; |
| 80 | |
| 81 | static struct ipv4_devconf ipv4_devconf_dflt = { |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 82 | .data = { |
Eric W. Biederman | 0229168 | 2010-02-14 03:25:51 +0000 | [diff] [blame] | 83 | [IPV4_DEVCONF_ACCEPT_REDIRECTS - 1] = 1, |
| 84 | [IPV4_DEVCONF_SEND_REDIRECTS - 1] = 1, |
| 85 | [IPV4_DEVCONF_SECURE_REDIRECTS - 1] = 1, |
| 86 | [IPV4_DEVCONF_SHARED_MEDIA - 1] = 1, |
| 87 | [IPV4_DEVCONF_ACCEPT_SOURCE_ROUTE - 1] = 1, |
William Manley | 2690048 | 2013-08-06 19:03:15 +0100 | [diff] [blame] | 88 | [IPV4_DEVCONF_IGMPV2_UNSOLICITED_REPORT_INTERVAL - 1] = 10000 /*ms*/, |
| 89 | [IPV4_DEVCONF_IGMPV3_UNSOLICITED_REPORT_INTERVAL - 1] = 1000 /*ms*/, |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 90 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | }; |
| 92 | |
Pavel Emelyanov | 9355bbd | 2007-12-16 13:32:16 -0800 | [diff] [blame] | 93 | #define IPV4_DEVCONF_DFLT(net, attr) \ |
| 94 | IPV4_DEVCONF((*net->ipv4.devconf_dflt), attr) |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 95 | |
Patrick McHardy | ef7c79e | 2007-06-05 12:38:30 -0700 | [diff] [blame] | 96 | static const struct nla_policy ifa_ipv4_policy[IFA_MAX+1] = { |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 97 | [IFA_LOCAL] = { .type = NLA_U32 }, |
| 98 | [IFA_ADDRESS] = { .type = NLA_U32 }, |
| 99 | [IFA_BROADCAST] = { .type = NLA_U32 }, |
Thomas Graf | 5176f91 | 2006-08-26 20:13:18 -0700 | [diff] [blame] | 100 | [IFA_LABEL] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 101 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, |
Jiri Pirko | ad6c813 | 2013-12-08 12:16:10 +0100 | [diff] [blame] | 102 | [IFA_FLAGS] = { .type = NLA_U32 }, |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 103 | }; |
| 104 | |
Eric Dumazet | 4038499 | 2012-08-03 21:06:50 +0000 | [diff] [blame] | 105 | #define IN4_ADDR_HSIZE_SHIFT 8 |
| 106 | #define IN4_ADDR_HSIZE (1U << IN4_ADDR_HSIZE_SHIFT) |
| 107 | |
David S. Miller | fd23c3b | 2011-02-18 12:42:28 -0800 | [diff] [blame] | 108 | static struct hlist_head inet_addr_lst[IN4_ADDR_HSIZE]; |
David S. Miller | fd23c3b | 2011-02-18 12:42:28 -0800 | [diff] [blame] | 109 | |
Eric Dumazet | 6eada01 | 2015-03-18 14:05:33 -0700 | [diff] [blame] | 110 | static u32 inet_addr_hash(const struct net *net, __be32 addr) |
David S. Miller | fd23c3b | 2011-02-18 12:42:28 -0800 | [diff] [blame] | 111 | { |
Eric Dumazet | 4038499 | 2012-08-03 21:06:50 +0000 | [diff] [blame] | 112 | u32 val = (__force u32) addr ^ net_hash_mix(net); |
David S. Miller | fd23c3b | 2011-02-18 12:42:28 -0800 | [diff] [blame] | 113 | |
Eric Dumazet | 4038499 | 2012-08-03 21:06:50 +0000 | [diff] [blame] | 114 | return hash_32(val, IN4_ADDR_HSIZE_SHIFT); |
David S. Miller | fd23c3b | 2011-02-18 12:42:28 -0800 | [diff] [blame] | 115 | } |
| 116 | |
| 117 | static void inet_hash_insert(struct net *net, struct in_ifaddr *ifa) |
| 118 | { |
Eric Dumazet | 4038499 | 2012-08-03 21:06:50 +0000 | [diff] [blame] | 119 | u32 hash = inet_addr_hash(net, ifa->ifa_local); |
David S. Miller | fd23c3b | 2011-02-18 12:42:28 -0800 | [diff] [blame] | 120 | |
WANG Cong | 32a4be4 | 2014-05-06 11:15:56 -0700 | [diff] [blame] | 121 | ASSERT_RTNL(); |
David S. Miller | fd23c3b | 2011-02-18 12:42:28 -0800 | [diff] [blame] | 122 | hlist_add_head_rcu(&ifa->hash, &inet_addr_lst[hash]); |
David S. Miller | fd23c3b | 2011-02-18 12:42:28 -0800 | [diff] [blame] | 123 | } |
| 124 | |
| 125 | static void inet_hash_remove(struct in_ifaddr *ifa) |
| 126 | { |
WANG Cong | 32a4be4 | 2014-05-06 11:15:56 -0700 | [diff] [blame] | 127 | ASSERT_RTNL(); |
David S. Miller | fd23c3b | 2011-02-18 12:42:28 -0800 | [diff] [blame] | 128 | hlist_del_init_rcu(&ifa->hash); |
David S. Miller | fd23c3b | 2011-02-18 12:42:28 -0800 | [diff] [blame] | 129 | } |
| 130 | |
David S. Miller | 9435eb1 | 2011-02-18 12:43:09 -0800 | [diff] [blame] | 131 | /** |
| 132 | * __ip_dev_find - find the first device with a given source address. |
| 133 | * @net: the net namespace |
| 134 | * @addr: the source address |
| 135 | * @devref: if true, take a reference on the found device |
| 136 | * |
| 137 | * If a caller uses devref=false, it should be protected by RCU, or RTNL |
| 138 | */ |
| 139 | struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref) |
| 140 | { |
Eric Dumazet | 4038499 | 2012-08-03 21:06:50 +0000 | [diff] [blame] | 141 | u32 hash = inet_addr_hash(net, addr); |
David S. Miller | 9435eb1 | 2011-02-18 12:43:09 -0800 | [diff] [blame] | 142 | struct net_device *result = NULL; |
| 143 | struct in_ifaddr *ifa; |
David S. Miller | 9435eb1 | 2011-02-18 12:43:09 -0800 | [diff] [blame] | 144 | |
| 145 | rcu_read_lock(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 146 | hlist_for_each_entry_rcu(ifa, &inet_addr_lst[hash], hash) { |
David S. Miller | e066008 | 2011-03-03 11:24:19 -0800 | [diff] [blame] | 147 | if (ifa->ifa_local == addr) { |
Eric Dumazet | 4038499 | 2012-08-03 21:06:50 +0000 | [diff] [blame] | 148 | struct net_device *dev = ifa->ifa_dev->dev; |
| 149 | |
| 150 | if (!net_eq(dev_net(dev), net)) |
| 151 | continue; |
David S. Miller | 9435eb1 | 2011-02-18 12:43:09 -0800 | [diff] [blame] | 152 | result = dev; |
| 153 | break; |
| 154 | } |
| 155 | } |
David S. Miller | 406b6f9 | 2011-03-22 21:56:23 -0700 | [diff] [blame] | 156 | if (!result) { |
| 157 | struct flowi4 fl4 = { .daddr = addr }; |
| 158 | struct fib_result res = { 0 }; |
| 159 | struct fib_table *local; |
| 160 | |
| 161 | /* Fallback to FIB local table so that communication |
| 162 | * over loopback subnets work. |
| 163 | */ |
| 164 | local = fib_get_table(net, RT_TABLE_LOCAL); |
| 165 | if (local && |
| 166 | !fib_table_lookup(local, &fl4, &res, FIB_LOOKUP_NOREF) && |
| 167 | res.type == RTN_LOCAL) |
| 168 | result = FIB_RES_DEV(res); |
| 169 | } |
David S. Miller | 9435eb1 | 2011-02-18 12:43:09 -0800 | [diff] [blame] | 170 | if (result && devref) |
| 171 | dev_hold(result); |
| 172 | rcu_read_unlock(); |
| 173 | return result; |
| 174 | } |
| 175 | EXPORT_SYMBOL(__ip_dev_find); |
| 176 | |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 177 | static void rtmsg_ifa(int event, struct in_ifaddr *, struct nlmsghdr *, u32); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 179 | static BLOCKING_NOTIFIER_HEAD(inetaddr_chain); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, |
| 181 | int destroy); |
| 182 | #ifdef CONFIG_SYSCTL |
WANG Cong | 20e61da | 2014-07-25 15:25:08 -0700 | [diff] [blame] | 183 | static int devinet_sysctl_register(struct in_device *idev); |
Pavel Emelyanov | 51602b2 | 2007-12-11 02:17:40 -0800 | [diff] [blame] | 184 | static void devinet_sysctl_unregister(struct in_device *idev); |
| 185 | #else |
WANG Cong | 20e61da | 2014-07-25 15:25:08 -0700 | [diff] [blame] | 186 | static int devinet_sysctl_register(struct in_device *idev) |
Pavel Emelyanov | 51602b2 | 2007-12-11 02:17:40 -0800 | [diff] [blame] | 187 | { |
WANG Cong | 20e61da | 2014-07-25 15:25:08 -0700 | [diff] [blame] | 188 | return 0; |
Pavel Emelyanov | 51602b2 | 2007-12-11 02:17:40 -0800 | [diff] [blame] | 189 | } |
Eric Dumazet | 4038499 | 2012-08-03 21:06:50 +0000 | [diff] [blame] | 190 | static void devinet_sysctl_unregister(struct in_device *idev) |
Pavel Emelyanov | 51602b2 | 2007-12-11 02:17:40 -0800 | [diff] [blame] | 191 | { |
| 192 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | #endif |
| 194 | |
| 195 | /* Locks all the inet devices. */ |
| 196 | |
| 197 | static struct in_ifaddr *inet_alloc_ifa(void) |
| 198 | { |
Alexey Dobriyan | 93adcc8 | 2008-10-28 13:25:09 -0700 | [diff] [blame] | 199 | return kzalloc(sizeof(struct in_ifaddr), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | } |
| 201 | |
| 202 | static void inet_rcu_free_ifa(struct rcu_head *head) |
| 203 | { |
| 204 | struct in_ifaddr *ifa = container_of(head, struct in_ifaddr, rcu_head); |
| 205 | if (ifa->ifa_dev) |
| 206 | in_dev_put(ifa->ifa_dev); |
| 207 | kfree(ifa); |
| 208 | } |
| 209 | |
Eric Dumazet | 4038499 | 2012-08-03 21:06:50 +0000 | [diff] [blame] | 210 | static void inet_free_ifa(struct in_ifaddr *ifa) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | { |
| 212 | call_rcu(&ifa->rcu_head, inet_rcu_free_ifa); |
| 213 | } |
| 214 | |
| 215 | void in_dev_finish_destroy(struct in_device *idev) |
| 216 | { |
| 217 | struct net_device *dev = idev->dev; |
| 218 | |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 219 | WARN_ON(idev->ifa_list); |
| 220 | WARN_ON(idev->mc_list); |
Eric Dumazet | e989707 | 2013-06-07 08:48:57 -0700 | [diff] [blame] | 221 | kfree(rcu_dereference_protected(idev->mc_hash, 1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | #ifdef NET_REFCNT_DEBUG |
Joe Perches | 91df42b | 2012-05-15 14:11:54 +0000 | [diff] [blame] | 223 | pr_debug("%s: %p=%s\n", __func__, idev, dev ? dev->name : "NIL"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | #endif |
| 225 | dev_put(dev); |
| 226 | if (!idev->dead) |
Eric Dumazet | 9f9354b | 2009-11-04 22:05:10 -0800 | [diff] [blame] | 227 | pr_err("Freeing alive in_device %p\n", idev); |
| 228 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | kfree(idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | } |
Eric Dumazet | 9f9354b | 2009-11-04 22:05:10 -0800 | [diff] [blame] | 231 | EXPORT_SYMBOL(in_dev_finish_destroy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | |
Herbert Xu | 71e27da | 2007-06-04 23:36:06 -0700 | [diff] [blame] | 233 | static struct in_device *inetdev_init(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | { |
| 235 | struct in_device *in_dev; |
WANG Cong | 20e61da | 2014-07-25 15:25:08 -0700 | [diff] [blame] | 236 | int err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | |
| 238 | ASSERT_RTNL(); |
| 239 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 240 | in_dev = kzalloc(sizeof(*in_dev), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | if (!in_dev) |
| 242 | goto out; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 243 | memcpy(&in_dev->cnf, dev_net(dev)->ipv4.devconf_dflt, |
Pavel Emelyanov | 9355bbd | 2007-12-16 13:32:16 -0800 | [diff] [blame] | 244 | sizeof(in_dev->cnf)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | in_dev->cnf.sysctl = NULL; |
| 246 | in_dev->dev = dev; |
Eric Dumazet | 9f9354b | 2009-11-04 22:05:10 -0800 | [diff] [blame] | 247 | in_dev->arp_parms = neigh_parms_alloc(dev, &arp_tbl); |
| 248 | if (!in_dev->arp_parms) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | goto out_kfree; |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 250 | if (IPV4_DEVCONF(in_dev->cnf, FORWARDING)) |
| 251 | dev_disable_lro(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | /* Reference in_dev->dev */ |
| 253 | dev_hold(dev); |
David L Stevens | 30c4cf5 | 2007-01-04 12:31:14 -0800 | [diff] [blame] | 254 | /* Account for reference dev->ip_ptr (below) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | in_dev_hold(in_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | |
WANG Cong | 20e61da | 2014-07-25 15:25:08 -0700 | [diff] [blame] | 257 | err = devinet_sysctl_register(in_dev); |
| 258 | if (err) { |
| 259 | in_dev->dead = 1; |
| 260 | in_dev_put(in_dev); |
| 261 | in_dev = NULL; |
| 262 | goto out; |
| 263 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | ip_mc_init_dev(in_dev); |
| 265 | if (dev->flags & IFF_UP) |
| 266 | ip_mc_up(in_dev); |
Jarek Poplawski | 483479e | 2007-01-09 14:38:31 -0800 | [diff] [blame] | 267 | |
David L Stevens | 30c4cf5 | 2007-01-04 12:31:14 -0800 | [diff] [blame] | 268 | /* we can receive as soon as ip_ptr is set -- do this last */ |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 269 | rcu_assign_pointer(dev->ip_ptr, in_dev); |
Jarek Poplawski | 483479e | 2007-01-09 14:38:31 -0800 | [diff] [blame] | 270 | out: |
WANG Cong | 20e61da | 2014-07-25 15:25:08 -0700 | [diff] [blame] | 271 | return in_dev ?: ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | out_kfree: |
| 273 | kfree(in_dev); |
| 274 | in_dev = NULL; |
| 275 | goto out; |
| 276 | } |
| 277 | |
| 278 | static void in_dev_rcu_put(struct rcu_head *head) |
| 279 | { |
| 280 | struct in_device *idev = container_of(head, struct in_device, rcu_head); |
| 281 | in_dev_put(idev); |
| 282 | } |
| 283 | |
| 284 | static void inetdev_destroy(struct in_device *in_dev) |
| 285 | { |
| 286 | struct in_ifaddr *ifa; |
| 287 | struct net_device *dev; |
| 288 | |
| 289 | ASSERT_RTNL(); |
| 290 | |
| 291 | dev = in_dev->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | |
| 293 | in_dev->dead = 1; |
| 294 | |
| 295 | ip_mc_destroy_dev(in_dev); |
| 296 | |
| 297 | while ((ifa = in_dev->ifa_list) != NULL) { |
| 298 | inet_del_ifa(in_dev, &in_dev->ifa_list, 0); |
| 299 | inet_free_ifa(ifa); |
| 300 | } |
| 301 | |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 302 | RCU_INIT_POINTER(dev->ip_ptr, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | |
Pavel Emelyanov | 51602b2 | 2007-12-11 02:17:40 -0800 | [diff] [blame] | 304 | devinet_sysctl_unregister(in_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | neigh_parms_release(&arp_tbl, in_dev->arp_parms); |
| 306 | arp_ifdown(dev); |
| 307 | |
| 308 | call_rcu(&in_dev->rcu_head, in_dev_rcu_put); |
| 309 | } |
| 310 | |
Al Viro | ff428d7 | 2006-09-26 22:13:35 -0700 | [diff] [blame] | 311 | 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] | 312 | { |
| 313 | rcu_read_lock(); |
| 314 | for_primary_ifa(in_dev) { |
| 315 | if (inet_ifa_match(a, ifa)) { |
| 316 | if (!b || inet_ifa_match(b, ifa)) { |
| 317 | rcu_read_unlock(); |
| 318 | return 1; |
| 319 | } |
| 320 | } |
| 321 | } endfor_ifa(in_dev); |
| 322 | rcu_read_unlock(); |
| 323 | return 0; |
| 324 | } |
| 325 | |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 326 | static void __inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 327 | int destroy, struct nlmsghdr *nlh, u32 portid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | { |
Harald Welte | 8f937c6 | 2005-05-29 20:23:46 -0700 | [diff] [blame] | 329 | struct in_ifaddr *promote = NULL; |
Jamal Hadi Salim | 0ff60a4 | 2005-11-22 14:47:37 -0800 | [diff] [blame] | 330 | struct in_ifaddr *ifa, *ifa1 = *ifap; |
| 331 | struct in_ifaddr *last_prim = in_dev->ifa_list; |
| 332 | struct in_ifaddr *prev_prom = NULL; |
| 333 | int do_promote = IN_DEV_PROMOTE_SECONDARIES(in_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | |
| 335 | ASSERT_RTNL(); |
| 336 | |
David S. Miller | fbd40ea | 2016-03-13 23:28:00 -0400 | [diff] [blame] | 337 | if (in_dev->dead) |
| 338 | goto no_promotions; |
| 339 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 340 | /* 1. Deleting primary ifaddr forces deletion all secondaries |
Harald Welte | 8f937c6 | 2005-05-29 20:23:46 -0700 | [diff] [blame] | 341 | * unless alias promotion is set |
| 342 | **/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | |
| 344 | if (!(ifa1->ifa_flags & IFA_F_SECONDARY)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | struct in_ifaddr **ifap1 = &ifa1->ifa_next; |
| 346 | |
| 347 | while ((ifa = *ifap1) != NULL) { |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 348 | if (!(ifa->ifa_flags & IFA_F_SECONDARY) && |
Jamal Hadi Salim | 0ff60a4 | 2005-11-22 14:47:37 -0800 | [diff] [blame] | 349 | ifa1->ifa_scope <= ifa->ifa_scope) |
| 350 | last_prim = ifa; |
| 351 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | if (!(ifa->ifa_flags & IFA_F_SECONDARY) || |
| 353 | ifa1->ifa_mask != ifa->ifa_mask || |
| 354 | !inet_ifa_match(ifa1->ifa_address, ifa)) { |
| 355 | ifap1 = &ifa->ifa_next; |
Jamal Hadi Salim | 0ff60a4 | 2005-11-22 14:47:37 -0800 | [diff] [blame] | 356 | prev_prom = ifa; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | continue; |
| 358 | } |
| 359 | |
Jamal Hadi Salim | 0ff60a4 | 2005-11-22 14:47:37 -0800 | [diff] [blame] | 360 | if (!do_promote) { |
David S. Miller | fd23c3b | 2011-02-18 12:42:28 -0800 | [diff] [blame] | 361 | inet_hash_remove(ifa); |
Harald Welte | 8f937c6 | 2005-05-29 20:23:46 -0700 | [diff] [blame] | 362 | *ifap1 = ifa->ifa_next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 364 | rtmsg_ifa(RTM_DELADDR, ifa, nlh, portid); |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 365 | blocking_notifier_call_chain(&inetaddr_chain, |
| 366 | NETDEV_DOWN, ifa); |
Harald Welte | 8f937c6 | 2005-05-29 20:23:46 -0700 | [diff] [blame] | 367 | inet_free_ifa(ifa); |
| 368 | } else { |
| 369 | promote = ifa; |
| 370 | break; |
| 371 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | } |
| 373 | } |
| 374 | |
Julian Anastasov | 2d230e2 | 2011-03-19 12:13:52 +0000 | [diff] [blame] | 375 | /* On promotion all secondaries from subnet are changing |
| 376 | * the primary IP, we must remove all their routes silently |
| 377 | * and later to add them back with new prefsrc. Do this |
| 378 | * while all addresses are on the device list. |
| 379 | */ |
| 380 | for (ifa = promote; ifa; ifa = ifa->ifa_next) { |
| 381 | if (ifa1->ifa_mask == ifa->ifa_mask && |
| 382 | inet_ifa_match(ifa1->ifa_address, ifa)) |
| 383 | fib_del_ifaddr(ifa, ifa1); |
| 384 | } |
| 385 | |
David S. Miller | fbd40ea | 2016-03-13 23:28:00 -0400 | [diff] [blame] | 386 | no_promotions: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | /* 2. Unlink it */ |
| 388 | |
| 389 | *ifap = ifa1->ifa_next; |
David S. Miller | fd23c3b | 2011-02-18 12:42:28 -0800 | [diff] [blame] | 390 | inet_hash_remove(ifa1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | |
| 392 | /* 3. Announce address deletion */ |
| 393 | |
| 394 | /* Send message first, then call notifier. |
| 395 | At first sight, FIB update triggered by notifier |
| 396 | will refer to already deleted ifaddr, that could confuse |
| 397 | netlink listeners. It is not true: look, gated sees |
| 398 | that route deleted and if it still thinks that ifaddr |
| 399 | is valid, it will try to restore deleted routes... Grr. |
| 400 | So that, this order is correct. |
| 401 | */ |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 402 | rtmsg_ifa(RTM_DELADDR, ifa1, nlh, portid); |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 403 | blocking_notifier_call_chain(&inetaddr_chain, NETDEV_DOWN, ifa1); |
Jamal Hadi Salim | 0ff60a4 | 2005-11-22 14:47:37 -0800 | [diff] [blame] | 404 | |
| 405 | if (promote) { |
Julian Anastasov | 04024b9 | 2011-03-19 12:13:54 +0000 | [diff] [blame] | 406 | struct in_ifaddr *next_sec = promote->ifa_next; |
Jamal Hadi Salim | 0ff60a4 | 2005-11-22 14:47:37 -0800 | [diff] [blame] | 407 | |
| 408 | if (prev_prom) { |
| 409 | prev_prom->ifa_next = promote->ifa_next; |
| 410 | promote->ifa_next = last_prim->ifa_next; |
| 411 | last_prim->ifa_next = promote; |
| 412 | } |
| 413 | |
| 414 | promote->ifa_flags &= ~IFA_F_SECONDARY; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 415 | rtmsg_ifa(RTM_NEWADDR, promote, nlh, portid); |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 416 | blocking_notifier_call_chain(&inetaddr_chain, |
| 417 | NETDEV_UP, promote); |
Julian Anastasov | 04024b9 | 2011-03-19 12:13:54 +0000 | [diff] [blame] | 418 | for (ifa = next_sec; ifa; ifa = ifa->ifa_next) { |
Jamal Hadi Salim | 0ff60a4 | 2005-11-22 14:47:37 -0800 | [diff] [blame] | 419 | if (ifa1->ifa_mask != ifa->ifa_mask || |
| 420 | !inet_ifa_match(ifa1->ifa_address, ifa)) |
| 421 | continue; |
| 422 | fib_add_ifaddr(ifa); |
| 423 | } |
| 424 | |
| 425 | } |
Herbert Xu | 6363097 | 2007-06-07 18:35:38 -0700 | [diff] [blame] | 426 | if (destroy) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | inet_free_ifa(ifa1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | } |
| 429 | |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 430 | static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, |
| 431 | int destroy) |
| 432 | { |
| 433 | __inet_del_ifa(in_dev, ifap, destroy, NULL, 0); |
| 434 | } |
| 435 | |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 436 | static void check_lifetime(struct work_struct *work); |
| 437 | |
| 438 | static DECLARE_DELAYED_WORK(check_lifetime_work, check_lifetime); |
| 439 | |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 440 | static int __inet_insert_ifa(struct in_ifaddr *ifa, struct nlmsghdr *nlh, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 441 | u32 portid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | { |
| 443 | struct in_device *in_dev = ifa->ifa_dev; |
| 444 | struct in_ifaddr *ifa1, **ifap, **last_primary; |
| 445 | |
| 446 | ASSERT_RTNL(); |
| 447 | |
| 448 | if (!ifa->ifa_local) { |
| 449 | inet_free_ifa(ifa); |
| 450 | return 0; |
| 451 | } |
| 452 | |
| 453 | ifa->ifa_flags &= ~IFA_F_SECONDARY; |
| 454 | last_primary = &in_dev->ifa_list; |
| 455 | |
| 456 | for (ifap = &in_dev->ifa_list; (ifa1 = *ifap) != NULL; |
| 457 | ifap = &ifa1->ifa_next) { |
| 458 | if (!(ifa1->ifa_flags & IFA_F_SECONDARY) && |
| 459 | ifa->ifa_scope <= ifa1->ifa_scope) |
| 460 | last_primary = &ifa1->ifa_next; |
| 461 | if (ifa1->ifa_mask == ifa->ifa_mask && |
| 462 | inet_ifa_match(ifa1->ifa_address, ifa)) { |
| 463 | if (ifa1->ifa_local == ifa->ifa_local) { |
| 464 | inet_free_ifa(ifa); |
| 465 | return -EEXIST; |
| 466 | } |
| 467 | if (ifa1->ifa_scope != ifa->ifa_scope) { |
| 468 | inet_free_ifa(ifa); |
| 469 | return -EINVAL; |
| 470 | } |
| 471 | ifa->ifa_flags |= IFA_F_SECONDARY; |
| 472 | } |
| 473 | } |
| 474 | |
| 475 | if (!(ifa->ifa_flags & IFA_F_SECONDARY)) { |
Aruna-Hewapathirane | 63862b5 | 2014-01-11 07:15:59 -0500 | [diff] [blame] | 476 | prandom_seed((__force u32) ifa->ifa_local); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | ifap = last_primary; |
| 478 | } |
| 479 | |
| 480 | ifa->ifa_next = *ifap; |
| 481 | *ifap = ifa; |
| 482 | |
David S. Miller | fd23c3b | 2011-02-18 12:42:28 -0800 | [diff] [blame] | 483 | inet_hash_insert(dev_net(in_dev->dev), ifa); |
| 484 | |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 485 | cancel_delayed_work(&check_lifetime_work); |
viresh kumar | 906e073 | 2014-01-22 12:23:32 +0530 | [diff] [blame] | 486 | queue_delayed_work(system_power_efficient_wq, &check_lifetime_work, 0); |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 487 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | /* Send message first, then call notifier. |
| 489 | Notifier will trigger FIB update, so that |
| 490 | listeners of netlink will know about new ifaddr */ |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 491 | rtmsg_ifa(RTM_NEWADDR, ifa, nlh, portid); |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 492 | blocking_notifier_call_chain(&inetaddr_chain, NETDEV_UP, ifa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | |
| 494 | return 0; |
| 495 | } |
| 496 | |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 497 | static int inet_insert_ifa(struct in_ifaddr *ifa) |
| 498 | { |
| 499 | return __inet_insert_ifa(ifa, NULL, 0); |
| 500 | } |
| 501 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | static int inet_set_ifa(struct net_device *dev, struct in_ifaddr *ifa) |
| 503 | { |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 504 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | |
| 506 | ASSERT_RTNL(); |
| 507 | |
| 508 | if (!in_dev) { |
Herbert Xu | 71e27da | 2007-06-04 23:36:06 -0700 | [diff] [blame] | 509 | inet_free_ifa(ifa); |
| 510 | return -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | } |
Herbert Xu | 71e27da | 2007-06-04 23:36:06 -0700 | [diff] [blame] | 512 | ipv4_devconf_setall(in_dev); |
Jiri Pirko | 1d4c8c2 | 2013-12-07 19:26:56 +0100 | [diff] [blame] | 513 | neigh_parms_data_state_setall(in_dev->arp_parms); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | if (ifa->ifa_dev != in_dev) { |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 515 | WARN_ON(ifa->ifa_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | in_dev_hold(in_dev); |
| 517 | ifa->ifa_dev = in_dev; |
| 518 | } |
Joe Perches | f97c1e0 | 2007-12-16 13:45:43 -0800 | [diff] [blame] | 519 | if (ipv4_is_loopback(ifa->ifa_local)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | ifa->ifa_scope = RT_SCOPE_HOST; |
| 521 | return inet_insert_ifa(ifa); |
| 522 | } |
| 523 | |
Eric Dumazet | 8723e1b | 2010-10-19 00:39:26 +0000 | [diff] [blame] | 524 | /* Caller must hold RCU or RTNL : |
| 525 | * We dont take a reference on found in_device |
| 526 | */ |
Denis V. Lunev | 7fee0ca | 2008-01-21 17:32:38 -0800 | [diff] [blame] | 527 | struct in_device *inetdev_by_index(struct net *net, int ifindex) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | { |
| 529 | struct net_device *dev; |
| 530 | struct in_device *in_dev = NULL; |
Eric Dumazet | c148fc2 | 2009-11-01 19:23:04 +0000 | [diff] [blame] | 531 | |
| 532 | rcu_read_lock(); |
| 533 | dev = dev_get_by_index_rcu(net, ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | if (dev) |
Eric Dumazet | 8723e1b | 2010-10-19 00:39:26 +0000 | [diff] [blame] | 535 | in_dev = rcu_dereference_rtnl(dev->ip_ptr); |
Eric Dumazet | c148fc2 | 2009-11-01 19:23:04 +0000 | [diff] [blame] | 536 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | return in_dev; |
| 538 | } |
Eric Dumazet | 9f9354b | 2009-11-04 22:05:10 -0800 | [diff] [blame] | 539 | EXPORT_SYMBOL(inetdev_by_index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | |
| 541 | /* Called only from RTNL semaphored context. No locks. */ |
| 542 | |
Al Viro | 60cad5d | 2006-09-26 22:17:09 -0700 | [diff] [blame] | 543 | struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, |
| 544 | __be32 mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | { |
| 546 | ASSERT_RTNL(); |
| 547 | |
| 548 | for_primary_ifa(in_dev) { |
| 549 | if (ifa->ifa_mask == mask && inet_ifa_match(prefix, ifa)) |
| 550 | return ifa; |
| 551 | } endfor_ifa(in_dev); |
| 552 | return NULL; |
| 553 | } |
| 554 | |
Madhu Challa | 93a714d | 2015-02-25 09:58:35 -0800 | [diff] [blame] | 555 | static int ip_mc_config(struct sock *sk, bool join, const struct in_ifaddr *ifa) |
| 556 | { |
| 557 | struct ip_mreqn mreq = { |
| 558 | .imr_multiaddr.s_addr = ifa->ifa_address, |
| 559 | .imr_ifindex = ifa->ifa_dev->dev->ifindex, |
| 560 | }; |
| 561 | int ret; |
| 562 | |
| 563 | ASSERT_RTNL(); |
| 564 | |
| 565 | lock_sock(sk); |
| 566 | if (join) |
Marcelo Ricardo Leitner | 54ff9ef | 2015-03-18 14:50:43 -0300 | [diff] [blame] | 567 | ret = ip_mc_join_group(sk, &mreq); |
Madhu Challa | 93a714d | 2015-02-25 09:58:35 -0800 | [diff] [blame] | 568 | else |
Marcelo Ricardo Leitner | 54ff9ef | 2015-03-18 14:50:43 -0300 | [diff] [blame] | 569 | ret = ip_mc_leave_group(sk, &mreq); |
Madhu Challa | 93a714d | 2015-02-25 09:58:35 -0800 | [diff] [blame] | 570 | release_sock(sk); |
| 571 | |
| 572 | return ret; |
| 573 | } |
| 574 | |
Thomas Graf | 661d296 | 2013-03-21 07:45:29 +0000 | [diff] [blame] | 575 | static int inet_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 577 | struct net *net = sock_net(skb->sk); |
Thomas Graf | dfdd5fd | 2006-08-04 23:04:17 -0700 | [diff] [blame] | 578 | struct nlattr *tb[IFA_MAX+1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | struct in_device *in_dev; |
Thomas Graf | dfdd5fd | 2006-08-04 23:04:17 -0700 | [diff] [blame] | 580 | struct ifaddrmsg *ifm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | struct in_ifaddr *ifa, **ifap; |
Thomas Graf | dfdd5fd | 2006-08-04 23:04:17 -0700 | [diff] [blame] | 582 | int err = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | |
| 584 | ASSERT_RTNL(); |
| 585 | |
Thomas Graf | dfdd5fd | 2006-08-04 23:04:17 -0700 | [diff] [blame] | 586 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv4_policy); |
| 587 | if (err < 0) |
| 588 | goto errout; |
| 589 | |
| 590 | ifm = nlmsg_data(nlh); |
Denis V. Lunev | 7fee0ca | 2008-01-21 17:32:38 -0800 | [diff] [blame] | 591 | in_dev = inetdev_by_index(net, ifm->ifa_index); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 592 | if (!in_dev) { |
Thomas Graf | dfdd5fd | 2006-08-04 23:04:17 -0700 | [diff] [blame] | 593 | err = -ENODEV; |
| 594 | goto errout; |
| 595 | } |
| 596 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL; |
| 598 | ifap = &ifa->ifa_next) { |
Thomas Graf | dfdd5fd | 2006-08-04 23:04:17 -0700 | [diff] [blame] | 599 | if (tb[IFA_LOCAL] && |
Jiri Benc | 67b61f6 | 2015-03-29 16:59:26 +0200 | [diff] [blame] | 600 | ifa->ifa_local != nla_get_in_addr(tb[IFA_LOCAL])) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | continue; |
Thomas Graf | dfdd5fd | 2006-08-04 23:04:17 -0700 | [diff] [blame] | 602 | |
| 603 | if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label)) |
| 604 | continue; |
| 605 | |
| 606 | if (tb[IFA_ADDRESS] && |
| 607 | (ifm->ifa_prefixlen != ifa->ifa_prefixlen || |
Jiri Benc | 67b61f6 | 2015-03-29 16:59:26 +0200 | [diff] [blame] | 608 | !inet_ifa_match(nla_get_in_addr(tb[IFA_ADDRESS]), ifa))) |
Thomas Graf | dfdd5fd | 2006-08-04 23:04:17 -0700 | [diff] [blame] | 609 | continue; |
| 610 | |
Madhu Challa | 93a714d | 2015-02-25 09:58:35 -0800 | [diff] [blame] | 611 | if (ipv4_is_multicast(ifa->ifa_address)) |
| 612 | ip_mc_config(net->ipv4.mc_autojoin_sk, false, ifa); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 613 | __inet_del_ifa(in_dev, ifap, 1, nlh, NETLINK_CB(skb).portid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | return 0; |
| 615 | } |
Thomas Graf | dfdd5fd | 2006-08-04 23:04:17 -0700 | [diff] [blame] | 616 | |
| 617 | err = -EADDRNOTAVAIL; |
| 618 | errout: |
| 619 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | } |
| 621 | |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 622 | #define INFINITY_LIFE_TIME 0xFFFFFFFF |
| 623 | |
| 624 | static void check_lifetime(struct work_struct *work) |
| 625 | { |
| 626 | unsigned long now, next, next_sec, next_sched; |
| 627 | struct in_ifaddr *ifa; |
Jiri Pirko | c988d1e | 2013-04-04 23:39:39 +0000 | [diff] [blame] | 628 | struct hlist_node *n; |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 629 | int i; |
| 630 | |
| 631 | now = jiffies; |
| 632 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); |
| 633 | |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 634 | for (i = 0; i < IN4_ADDR_HSIZE; i++) { |
Jiri Pirko | c988d1e | 2013-04-04 23:39:39 +0000 | [diff] [blame] | 635 | bool change_needed = false; |
| 636 | |
| 637 | rcu_read_lock(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 638 | hlist_for_each_entry_rcu(ifa, &inet_addr_lst[i], hash) { |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 639 | unsigned long age; |
| 640 | |
| 641 | if (ifa->ifa_flags & IFA_F_PERMANENT) |
| 642 | continue; |
| 643 | |
| 644 | /* We try to batch several events at once. */ |
| 645 | age = (now - ifa->ifa_tstamp + |
| 646 | ADDRCONF_TIMER_FUZZ_MINUS) / HZ; |
| 647 | |
| 648 | if (ifa->ifa_valid_lft != INFINITY_LIFE_TIME && |
| 649 | age >= ifa->ifa_valid_lft) { |
Jiri Pirko | c988d1e | 2013-04-04 23:39:39 +0000 | [diff] [blame] | 650 | change_needed = true; |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 651 | } else if (ifa->ifa_preferred_lft == |
| 652 | INFINITY_LIFE_TIME) { |
| 653 | continue; |
| 654 | } else if (age >= ifa->ifa_preferred_lft) { |
| 655 | if (time_before(ifa->ifa_tstamp + |
| 656 | ifa->ifa_valid_lft * HZ, next)) |
| 657 | next = ifa->ifa_tstamp + |
| 658 | ifa->ifa_valid_lft * HZ; |
| 659 | |
Jiri Pirko | c988d1e | 2013-04-04 23:39:39 +0000 | [diff] [blame] | 660 | if (!(ifa->ifa_flags & IFA_F_DEPRECATED)) |
| 661 | change_needed = true; |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 662 | } else if (time_before(ifa->ifa_tstamp + |
| 663 | ifa->ifa_preferred_lft * HZ, |
| 664 | next)) { |
| 665 | next = ifa->ifa_tstamp + |
| 666 | ifa->ifa_preferred_lft * HZ; |
| 667 | } |
| 668 | } |
Jiri Pirko | c988d1e | 2013-04-04 23:39:39 +0000 | [diff] [blame] | 669 | rcu_read_unlock(); |
| 670 | if (!change_needed) |
| 671 | continue; |
| 672 | rtnl_lock(); |
| 673 | hlist_for_each_entry_safe(ifa, n, &inet_addr_lst[i], hash) { |
| 674 | unsigned long age; |
| 675 | |
| 676 | if (ifa->ifa_flags & IFA_F_PERMANENT) |
| 677 | continue; |
| 678 | |
| 679 | /* We try to batch several events at once. */ |
| 680 | age = (now - ifa->ifa_tstamp + |
| 681 | ADDRCONF_TIMER_FUZZ_MINUS) / HZ; |
| 682 | |
| 683 | if (ifa->ifa_valid_lft != INFINITY_LIFE_TIME && |
| 684 | age >= ifa->ifa_valid_lft) { |
| 685 | struct in_ifaddr **ifap; |
| 686 | |
| 687 | for (ifap = &ifa->ifa_dev->ifa_list; |
| 688 | *ifap != NULL; ifap = &(*ifap)->ifa_next) { |
| 689 | if (*ifap == ifa) { |
| 690 | inet_del_ifa(ifa->ifa_dev, |
| 691 | ifap, 1); |
| 692 | break; |
| 693 | } |
| 694 | } |
| 695 | } else if (ifa->ifa_preferred_lft != |
| 696 | INFINITY_LIFE_TIME && |
| 697 | age >= ifa->ifa_preferred_lft && |
| 698 | !(ifa->ifa_flags & IFA_F_DEPRECATED)) { |
| 699 | ifa->ifa_flags |= IFA_F_DEPRECATED; |
| 700 | rtmsg_ifa(RTM_NEWADDR, ifa, NULL, 0); |
| 701 | } |
| 702 | } |
| 703 | rtnl_unlock(); |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 704 | } |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 705 | |
| 706 | next_sec = round_jiffies_up(next); |
| 707 | next_sched = next; |
| 708 | |
| 709 | /* If rounded timeout is accurate enough, accept it. */ |
| 710 | if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) |
| 711 | next_sched = next_sec; |
| 712 | |
| 713 | now = jiffies; |
| 714 | /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ |
| 715 | if (time_before(next_sched, now + ADDRCONF_TIMER_FUZZ_MAX)) |
| 716 | next_sched = now + ADDRCONF_TIMER_FUZZ_MAX; |
| 717 | |
viresh kumar | 906e073 | 2014-01-22 12:23:32 +0530 | [diff] [blame] | 718 | queue_delayed_work(system_power_efficient_wq, &check_lifetime_work, |
| 719 | next_sched - now); |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 720 | } |
| 721 | |
| 722 | static void set_ifa_lifetime(struct in_ifaddr *ifa, __u32 valid_lft, |
| 723 | __u32 prefered_lft) |
| 724 | { |
| 725 | unsigned long timeout; |
| 726 | |
| 727 | ifa->ifa_flags &= ~(IFA_F_PERMANENT | IFA_F_DEPRECATED); |
| 728 | |
| 729 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
| 730 | if (addrconf_finite_timeout(timeout)) |
| 731 | ifa->ifa_valid_lft = timeout; |
| 732 | else |
| 733 | ifa->ifa_flags |= IFA_F_PERMANENT; |
| 734 | |
| 735 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
| 736 | if (addrconf_finite_timeout(timeout)) { |
| 737 | if (timeout == 0) |
| 738 | ifa->ifa_flags |= IFA_F_DEPRECATED; |
| 739 | ifa->ifa_preferred_lft = timeout; |
| 740 | } |
| 741 | ifa->ifa_tstamp = jiffies; |
| 742 | if (!ifa->ifa_cstamp) |
| 743 | ifa->ifa_cstamp = ifa->ifa_tstamp; |
| 744 | } |
| 745 | |
| 746 | static struct in_ifaddr *rtm_to_ifaddr(struct net *net, struct nlmsghdr *nlh, |
| 747 | __u32 *pvalid_lft, __u32 *pprefered_lft) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | { |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 749 | struct nlattr *tb[IFA_MAX+1]; |
| 750 | struct in_ifaddr *ifa; |
| 751 | struct ifaddrmsg *ifm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | struct net_device *dev; |
| 753 | struct in_device *in_dev; |
Denis V. Lunev | 7b21857 | 2008-01-31 18:47:00 -0800 | [diff] [blame] | 754 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 756 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv4_policy); |
| 757 | if (err < 0) |
| 758 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 760 | ifm = nlmsg_data(nlh); |
Denis V. Lunev | 7b21857 | 2008-01-31 18:47:00 -0800 | [diff] [blame] | 761 | err = -EINVAL; |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 762 | if (ifm->ifa_prefixlen > 32 || !tb[IFA_LOCAL]) |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 763 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | |
Denis V. Lunev | 4b8aa9a | 2008-01-31 18:47:40 -0800 | [diff] [blame] | 765 | dev = __dev_get_by_index(net, ifm->ifa_index); |
Denis V. Lunev | 7b21857 | 2008-01-31 18:47:00 -0800 | [diff] [blame] | 766 | err = -ENODEV; |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 767 | if (!dev) |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 768 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 770 | in_dev = __in_dev_get_rtnl(dev); |
Denis V. Lunev | 7b21857 | 2008-01-31 18:47:00 -0800 | [diff] [blame] | 771 | err = -ENOBUFS; |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 772 | if (!in_dev) |
Herbert Xu | 71e27da | 2007-06-04 23:36:06 -0700 | [diff] [blame] | 773 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 775 | ifa = inet_alloc_ifa(); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 776 | if (!ifa) |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 777 | /* |
| 778 | * A potential indev allocation can be left alive, it stays |
| 779 | * assigned to its device and is destroy with it. |
| 780 | */ |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 781 | goto errout; |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 782 | |
Pavel Emelyanov | a4e65d3 | 2007-12-07 23:55:43 -0800 | [diff] [blame] | 783 | ipv4_devconf_setall(in_dev); |
Jiri Pirko | 1d4c8c2 | 2013-12-07 19:26:56 +0100 | [diff] [blame] | 784 | neigh_parms_data_state_setall(in_dev->arp_parms); |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 785 | in_dev_hold(in_dev); |
| 786 | |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 787 | if (!tb[IFA_ADDRESS]) |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 788 | tb[IFA_ADDRESS] = tb[IFA_LOCAL]; |
| 789 | |
David S. Miller | fd23c3b | 2011-02-18 12:42:28 -0800 | [diff] [blame] | 790 | INIT_HLIST_NODE(&ifa->hash); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | ifa->ifa_prefixlen = ifm->ifa_prefixlen; |
| 792 | ifa->ifa_mask = inet_make_mask(ifm->ifa_prefixlen); |
Jiri Pirko | ad6c813 | 2013-12-08 12:16:10 +0100 | [diff] [blame] | 793 | ifa->ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : |
| 794 | ifm->ifa_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | ifa->ifa_scope = ifm->ifa_scope; |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 796 | ifa->ifa_dev = in_dev; |
| 797 | |
Jiri Benc | 67b61f6 | 2015-03-29 16:59:26 +0200 | [diff] [blame] | 798 | ifa->ifa_local = nla_get_in_addr(tb[IFA_LOCAL]); |
| 799 | ifa->ifa_address = nla_get_in_addr(tb[IFA_ADDRESS]); |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 800 | |
| 801 | if (tb[IFA_BROADCAST]) |
Jiri Benc | 67b61f6 | 2015-03-29 16:59:26 +0200 | [diff] [blame] | 802 | ifa->ifa_broadcast = nla_get_in_addr(tb[IFA_BROADCAST]); |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 803 | |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 804 | if (tb[IFA_LABEL]) |
| 805 | nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | else |
| 807 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
| 808 | |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 809 | if (tb[IFA_CACHEINFO]) { |
| 810 | struct ifa_cacheinfo *ci; |
| 811 | |
| 812 | ci = nla_data(tb[IFA_CACHEINFO]); |
| 813 | if (!ci->ifa_valid || ci->ifa_prefered > ci->ifa_valid) { |
| 814 | err = -EINVAL; |
Daniel Borkmann | 446266b | 2013-08-02 11:32:43 +0200 | [diff] [blame] | 815 | goto errout_free; |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 816 | } |
| 817 | *pvalid_lft = ci->ifa_valid; |
| 818 | *pprefered_lft = ci->ifa_prefered; |
| 819 | } |
| 820 | |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 821 | return ifa; |
| 822 | |
Daniel Borkmann | 446266b | 2013-08-02 11:32:43 +0200 | [diff] [blame] | 823 | errout_free: |
| 824 | inet_free_ifa(ifa); |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 825 | errout: |
| 826 | return ERR_PTR(err); |
| 827 | } |
| 828 | |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 829 | static struct in_ifaddr *find_matching_ifa(struct in_ifaddr *ifa) |
| 830 | { |
| 831 | struct in_device *in_dev = ifa->ifa_dev; |
| 832 | struct in_ifaddr *ifa1, **ifap; |
| 833 | |
| 834 | if (!ifa->ifa_local) |
| 835 | return NULL; |
| 836 | |
| 837 | for (ifap = &in_dev->ifa_list; (ifa1 = *ifap) != NULL; |
| 838 | ifap = &ifa1->ifa_next) { |
| 839 | if (ifa1->ifa_mask == ifa->ifa_mask && |
| 840 | inet_ifa_match(ifa1->ifa_address, ifa) && |
| 841 | ifa1->ifa_local == ifa->ifa_local) |
| 842 | return ifa1; |
| 843 | } |
| 844 | return NULL; |
| 845 | } |
| 846 | |
Thomas Graf | 661d296 | 2013-03-21 07:45:29 +0000 | [diff] [blame] | 847 | static int inet_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh) |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 848 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 849 | struct net *net = sock_net(skb->sk); |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 850 | struct in_ifaddr *ifa; |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 851 | struct in_ifaddr *ifa_existing; |
| 852 | __u32 valid_lft = INFINITY_LIFE_TIME; |
| 853 | __u32 prefered_lft = INFINITY_LIFE_TIME; |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 854 | |
| 855 | ASSERT_RTNL(); |
| 856 | |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 857 | ifa = rtm_to_ifaddr(net, nlh, &valid_lft, &prefered_lft); |
Thomas Graf | 5c75397 | 2006-08-04 23:03:53 -0700 | [diff] [blame] | 858 | if (IS_ERR(ifa)) |
| 859 | return PTR_ERR(ifa); |
| 860 | |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 861 | ifa_existing = find_matching_ifa(ifa); |
| 862 | if (!ifa_existing) { |
| 863 | /* It would be best to check for !NLM_F_CREATE here but |
stephen hemminger | 614d056 | 2014-05-16 20:46:58 -0700 | [diff] [blame] | 864 | * userspace already relies on not having to provide this. |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 865 | */ |
| 866 | set_ifa_lifetime(ifa, valid_lft, prefered_lft); |
Madhu Challa | 93a714d | 2015-02-25 09:58:35 -0800 | [diff] [blame] | 867 | if (ifa->ifa_flags & IFA_F_MCAUTOJOIN) { |
| 868 | int ret = ip_mc_config(net->ipv4.mc_autojoin_sk, |
| 869 | true, ifa); |
| 870 | |
| 871 | if (ret < 0) { |
| 872 | inet_free_ifa(ifa); |
| 873 | return ret; |
| 874 | } |
| 875 | } |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 876 | return __inet_insert_ifa(ifa, nlh, NETLINK_CB(skb).portid); |
| 877 | } else { |
| 878 | inet_free_ifa(ifa); |
| 879 | |
| 880 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
| 881 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) |
| 882 | return -EEXIST; |
Jiri Pirko | 34e2ed3 | 2013-04-04 08:33:00 +0000 | [diff] [blame] | 883 | ifa = ifa_existing; |
| 884 | set_ifa_lifetime(ifa, valid_lft, prefered_lft); |
Jiri Pirko | 05a324b | 2013-04-04 23:39:38 +0000 | [diff] [blame] | 885 | cancel_delayed_work(&check_lifetime_work); |
viresh kumar | 906e073 | 2014-01-22 12:23:32 +0530 | [diff] [blame] | 886 | queue_delayed_work(system_power_efficient_wq, |
| 887 | &check_lifetime_work, 0); |
Jiri Pirko | 34e2ed3 | 2013-04-04 08:33:00 +0000 | [diff] [blame] | 888 | rtmsg_ifa(RTM_NEWADDR, ifa, nlh, NETLINK_CB(skb).portid); |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 889 | } |
| 890 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | } |
| 892 | |
| 893 | /* |
| 894 | * Determine a default network mask, based on the IP address. |
| 895 | */ |
| 896 | |
Eric Dumazet | 4038499 | 2012-08-03 21:06:50 +0000 | [diff] [blame] | 897 | static int inet_abc_len(__be32 addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | { |
| 899 | int rc = -1; /* Something else, probably a multicast. */ |
| 900 | |
Joe Perches | f97c1e0 | 2007-12-16 13:45:43 -0800 | [diff] [blame] | 901 | if (ipv4_is_zeronet(addr)) |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 902 | rc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | else { |
Al Viro | 714e85b | 2006-11-14 20:51:49 -0800 | [diff] [blame] | 904 | __u32 haddr = ntohl(addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | |
Al Viro | 714e85b | 2006-11-14 20:51:49 -0800 | [diff] [blame] | 906 | if (IN_CLASSA(haddr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | rc = 8; |
Al Viro | 714e85b | 2006-11-14 20:51:49 -0800 | [diff] [blame] | 908 | else if (IN_CLASSB(haddr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | rc = 16; |
Al Viro | 714e85b | 2006-11-14 20:51:49 -0800 | [diff] [blame] | 910 | else if (IN_CLASSC(haddr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | rc = 24; |
| 912 | } |
| 913 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 914 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | } |
| 916 | |
| 917 | |
Denis V. Lunev | e5b13cb | 2008-02-28 20:51:43 -0800 | [diff] [blame] | 918 | int devinet_ioctl(struct net *net, unsigned int cmd, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | { |
| 920 | struct ifreq ifr; |
| 921 | struct sockaddr_in sin_orig; |
| 922 | struct sockaddr_in *sin = (struct sockaddr_in *)&ifr.ifr_addr; |
| 923 | struct in_device *in_dev; |
| 924 | struct in_ifaddr **ifap = NULL; |
| 925 | struct in_ifaddr *ifa = NULL; |
| 926 | struct net_device *dev; |
| 927 | char *colon; |
| 928 | int ret = -EFAULT; |
| 929 | int tryaddrmatch = 0; |
| 930 | |
| 931 | /* |
| 932 | * Fetch the caller's info block into kernel space |
| 933 | */ |
| 934 | |
| 935 | if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) |
| 936 | goto out; |
| 937 | ifr.ifr_name[IFNAMSIZ - 1] = 0; |
| 938 | |
| 939 | /* save original address for comparison */ |
| 940 | memcpy(&sin_orig, sin, sizeof(*sin)); |
| 941 | |
| 942 | colon = strchr(ifr.ifr_name, ':'); |
| 943 | if (colon) |
| 944 | *colon = 0; |
| 945 | |
Denis V. Lunev | e5b13cb | 2008-02-28 20:51:43 -0800 | [diff] [blame] | 946 | dev_load(net, ifr.ifr_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 948 | switch (cmd) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | case SIOCGIFADDR: /* Get interface address */ |
| 950 | case SIOCGIFBRDADDR: /* Get the broadcast address */ |
| 951 | case SIOCGIFDSTADDR: /* Get the destination address */ |
| 952 | case SIOCGIFNETMASK: /* Get the netmask for the interface */ |
| 953 | /* Note that these ioctls will not sleep, |
| 954 | so that we do not impose a lock. |
| 955 | One day we will be forced to put shlock here (I mean SMP) |
| 956 | */ |
| 957 | tryaddrmatch = (sin_orig.sin_family == AF_INET); |
| 958 | memset(sin, 0, sizeof(*sin)); |
| 959 | sin->sin_family = AF_INET; |
| 960 | break; |
| 961 | |
| 962 | case SIOCSIFFLAGS: |
Zhao Hongjiang | bf5b30b | 2012-09-20 22:37:25 +0000 | [diff] [blame] | 963 | ret = -EPERM; |
Eric W. Biederman | 52e804c | 2012-11-16 03:03:05 +0000 | [diff] [blame] | 964 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | goto out; |
| 966 | break; |
| 967 | case SIOCSIFADDR: /* Set interface address (and family) */ |
| 968 | case SIOCSIFBRDADDR: /* Set the broadcast address */ |
| 969 | case SIOCSIFDSTADDR: /* Set the destination address */ |
| 970 | case SIOCSIFNETMASK: /* Set the netmask for the interface */ |
Zhao Hongjiang | bf5b30b | 2012-09-20 22:37:25 +0000 | [diff] [blame] | 971 | ret = -EPERM; |
Eric W. Biederman | 52e804c | 2012-11-16 03:03:05 +0000 | [diff] [blame] | 972 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | goto out; |
| 974 | ret = -EINVAL; |
| 975 | if (sin->sin_family != AF_INET) |
| 976 | goto out; |
| 977 | break; |
| 978 | default: |
| 979 | ret = -EINVAL; |
| 980 | goto out; |
| 981 | } |
| 982 | |
| 983 | rtnl_lock(); |
| 984 | |
| 985 | ret = -ENODEV; |
Eric Dumazet | 9f9354b | 2009-11-04 22:05:10 -0800 | [diff] [blame] | 986 | dev = __dev_get_by_name(net, ifr.ifr_name); |
| 987 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | goto done; |
| 989 | |
| 990 | if (colon) |
| 991 | *colon = ':'; |
| 992 | |
Eric Dumazet | 9f9354b | 2009-11-04 22:05:10 -0800 | [diff] [blame] | 993 | in_dev = __in_dev_get_rtnl(dev); |
| 994 | if (in_dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | if (tryaddrmatch) { |
| 996 | /* Matthias Andree */ |
| 997 | /* compare label and address (4.4BSD style) */ |
| 998 | /* note: we only do this for a limited set of ioctls |
| 999 | and only if the original address family was AF_INET. |
| 1000 | This is checked above. */ |
| 1001 | for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL; |
| 1002 | ifap = &ifa->ifa_next) { |
| 1003 | if (!strcmp(ifr.ifr_name, ifa->ifa_label) && |
| 1004 | sin_orig.sin_addr.s_addr == |
David S. Miller | 6c91afe | 2011-03-09 13:27:16 -0800 | [diff] [blame] | 1005 | ifa->ifa_local) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | break; /* found */ |
| 1007 | } |
| 1008 | } |
| 1009 | } |
| 1010 | /* we didn't get a match, maybe the application is |
| 1011 | 4.3BSD-style and passed in junk so we fall back to |
| 1012 | comparing just the label */ |
| 1013 | if (!ifa) { |
| 1014 | for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL; |
| 1015 | ifap = &ifa->ifa_next) |
| 1016 | if (!strcmp(ifr.ifr_name, ifa->ifa_label)) |
| 1017 | break; |
| 1018 | } |
| 1019 | } |
| 1020 | |
| 1021 | ret = -EADDRNOTAVAIL; |
| 1022 | if (!ifa && cmd != SIOCSIFADDR && cmd != SIOCSIFFLAGS) |
| 1023 | goto done; |
| 1024 | |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1025 | switch (cmd) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | case SIOCGIFADDR: /* Get interface address */ |
| 1027 | sin->sin_addr.s_addr = ifa->ifa_local; |
| 1028 | goto rarok; |
| 1029 | |
| 1030 | case SIOCGIFBRDADDR: /* Get the broadcast address */ |
| 1031 | sin->sin_addr.s_addr = ifa->ifa_broadcast; |
| 1032 | goto rarok; |
| 1033 | |
| 1034 | case SIOCGIFDSTADDR: /* Get the destination address */ |
| 1035 | sin->sin_addr.s_addr = ifa->ifa_address; |
| 1036 | goto rarok; |
| 1037 | |
| 1038 | case SIOCGIFNETMASK: /* Get the netmask for the interface */ |
| 1039 | sin->sin_addr.s_addr = ifa->ifa_mask; |
| 1040 | goto rarok; |
| 1041 | |
| 1042 | case SIOCSIFFLAGS: |
| 1043 | if (colon) { |
| 1044 | ret = -EADDRNOTAVAIL; |
| 1045 | if (!ifa) |
| 1046 | break; |
| 1047 | ret = 0; |
| 1048 | if (!(ifr.ifr_flags & IFF_UP)) |
| 1049 | inet_del_ifa(in_dev, ifap, 1); |
| 1050 | break; |
| 1051 | } |
| 1052 | ret = dev_change_flags(dev, ifr.ifr_flags); |
| 1053 | break; |
| 1054 | |
| 1055 | case SIOCSIFADDR: /* Set interface address (and family) */ |
| 1056 | ret = -EINVAL; |
| 1057 | if (inet_abc_len(sin->sin_addr.s_addr) < 0) |
| 1058 | break; |
| 1059 | |
| 1060 | if (!ifa) { |
| 1061 | ret = -ENOBUFS; |
Eric Dumazet | 9f9354b | 2009-11-04 22:05:10 -0800 | [diff] [blame] | 1062 | ifa = inet_alloc_ifa(); |
| 1063 | if (!ifa) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1064 | break; |
Xi Wang | c7e2e1d | 2013-01-05 11:19:24 +0000 | [diff] [blame] | 1065 | INIT_HLIST_NODE(&ifa->hash); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | if (colon) |
| 1067 | memcpy(ifa->ifa_label, ifr.ifr_name, IFNAMSIZ); |
| 1068 | else |
| 1069 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
| 1070 | } else { |
| 1071 | ret = 0; |
| 1072 | if (ifa->ifa_local == sin->sin_addr.s_addr) |
| 1073 | break; |
| 1074 | inet_del_ifa(in_dev, ifap, 0); |
| 1075 | ifa->ifa_broadcast = 0; |
Bjorn Mork | 148f972 | 2008-02-26 18:17:53 -0800 | [diff] [blame] | 1076 | ifa->ifa_scope = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | } |
| 1078 | |
| 1079 | ifa->ifa_address = ifa->ifa_local = sin->sin_addr.s_addr; |
| 1080 | |
| 1081 | if (!(dev->flags & IFF_POINTOPOINT)) { |
| 1082 | ifa->ifa_prefixlen = inet_abc_len(ifa->ifa_address); |
| 1083 | ifa->ifa_mask = inet_make_mask(ifa->ifa_prefixlen); |
| 1084 | if ((dev->flags & IFF_BROADCAST) && |
| 1085 | ifa->ifa_prefixlen < 31) |
| 1086 | ifa->ifa_broadcast = ifa->ifa_address | |
| 1087 | ~ifa->ifa_mask; |
| 1088 | } else { |
| 1089 | ifa->ifa_prefixlen = 32; |
| 1090 | ifa->ifa_mask = inet_make_mask(32); |
| 1091 | } |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 1092 | set_ifa_lifetime(ifa, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | ret = inet_set_ifa(dev, ifa); |
| 1094 | break; |
| 1095 | |
| 1096 | case SIOCSIFBRDADDR: /* Set the broadcast address */ |
| 1097 | ret = 0; |
| 1098 | if (ifa->ifa_broadcast != sin->sin_addr.s_addr) { |
| 1099 | inet_del_ifa(in_dev, ifap, 0); |
| 1100 | ifa->ifa_broadcast = sin->sin_addr.s_addr; |
| 1101 | inet_insert_ifa(ifa); |
| 1102 | } |
| 1103 | break; |
| 1104 | |
| 1105 | case SIOCSIFDSTADDR: /* Set the destination address */ |
| 1106 | ret = 0; |
| 1107 | if (ifa->ifa_address == sin->sin_addr.s_addr) |
| 1108 | break; |
| 1109 | ret = -EINVAL; |
| 1110 | if (inet_abc_len(sin->sin_addr.s_addr) < 0) |
| 1111 | break; |
| 1112 | ret = 0; |
| 1113 | inet_del_ifa(in_dev, ifap, 0); |
| 1114 | ifa->ifa_address = sin->sin_addr.s_addr; |
| 1115 | inet_insert_ifa(ifa); |
| 1116 | break; |
| 1117 | |
| 1118 | case SIOCSIFNETMASK: /* Set the netmask for the interface */ |
| 1119 | |
| 1120 | /* |
| 1121 | * The mask we set must be legal. |
| 1122 | */ |
| 1123 | ret = -EINVAL; |
| 1124 | if (bad_mask(sin->sin_addr.s_addr, 0)) |
| 1125 | break; |
| 1126 | ret = 0; |
| 1127 | if (ifa->ifa_mask != sin->sin_addr.s_addr) { |
Al Viro | a144ea4 | 2006-09-28 18:00:55 -0700 | [diff] [blame] | 1128 | __be32 old_mask = ifa->ifa_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | inet_del_ifa(in_dev, ifap, 0); |
| 1130 | ifa->ifa_mask = sin->sin_addr.s_addr; |
| 1131 | ifa->ifa_prefixlen = inet_mask_len(ifa->ifa_mask); |
| 1132 | |
| 1133 | /* See if current broadcast address matches |
| 1134 | * with current netmask, then recalculate |
| 1135 | * the broadcast address. Otherwise it's a |
| 1136 | * funny address, so don't touch it since |
| 1137 | * the user seems to know what (s)he's doing... |
| 1138 | */ |
| 1139 | if ((dev->flags & IFF_BROADCAST) && |
| 1140 | (ifa->ifa_prefixlen < 31) && |
| 1141 | (ifa->ifa_broadcast == |
David Engel | dcab5e1 | 2005-10-21 22:09:16 -0500 | [diff] [blame] | 1142 | (ifa->ifa_local|~old_mask))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1143 | ifa->ifa_broadcast = (ifa->ifa_local | |
| 1144 | ~sin->sin_addr.s_addr); |
| 1145 | } |
| 1146 | inet_insert_ifa(ifa); |
| 1147 | } |
| 1148 | break; |
| 1149 | } |
| 1150 | done: |
| 1151 | rtnl_unlock(); |
| 1152 | out: |
| 1153 | return ret; |
| 1154 | rarok: |
| 1155 | rtnl_unlock(); |
| 1156 | ret = copy_to_user(arg, &ifr, sizeof(struct ifreq)) ? -EFAULT : 0; |
| 1157 | goto out; |
| 1158 | } |
| 1159 | |
| 1160 | static int inet_gifconf(struct net_device *dev, char __user *buf, int len) |
| 1161 | { |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 1162 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | struct in_ifaddr *ifa; |
| 1164 | struct ifreq ifr; |
| 1165 | int done = 0; |
| 1166 | |
Eric Dumazet | 9f9354b | 2009-11-04 22:05:10 -0800 | [diff] [blame] | 1167 | if (!in_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1168 | goto out; |
| 1169 | |
Eric Dumazet | 9f9354b | 2009-11-04 22:05:10 -0800 | [diff] [blame] | 1170 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | if (!buf) { |
| 1172 | done += sizeof(ifr); |
| 1173 | continue; |
| 1174 | } |
| 1175 | if (len < (int) sizeof(ifr)) |
| 1176 | break; |
| 1177 | memset(&ifr, 0, sizeof(struct ifreq)); |
Dan Carpenter | 4299c8a | 2013-07-29 22:15:19 +0300 | [diff] [blame] | 1178 | strcpy(ifr.ifr_name, ifa->ifa_label); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | |
| 1180 | (*(struct sockaddr_in *)&ifr.ifr_addr).sin_family = AF_INET; |
| 1181 | (*(struct sockaddr_in *)&ifr.ifr_addr).sin_addr.s_addr = |
| 1182 | ifa->ifa_local; |
| 1183 | |
| 1184 | if (copy_to_user(buf, &ifr, sizeof(struct ifreq))) { |
| 1185 | done = -EFAULT; |
| 1186 | break; |
| 1187 | } |
| 1188 | buf += sizeof(struct ifreq); |
| 1189 | len -= sizeof(struct ifreq); |
| 1190 | done += sizeof(struct ifreq); |
| 1191 | } |
| 1192 | out: |
| 1193 | return done; |
| 1194 | } |
| 1195 | |
Al Viro | a61ced5 | 2006-09-26 21:27:54 -0700 | [diff] [blame] | 1196 | __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] | 1197 | { |
Al Viro | a61ced5 | 2006-09-26 21:27:54 -0700 | [diff] [blame] | 1198 | __be32 addr = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1199 | struct in_device *in_dev; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1200 | struct net *net = dev_net(dev); |
David Ahern | 3f2fb9a | 2016-02-24 11:47:02 -0800 | [diff] [blame] | 1201 | int master_idx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | |
| 1203 | rcu_read_lock(); |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 1204 | in_dev = __in_dev_get_rcu(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | if (!in_dev) |
| 1206 | goto no_in_dev; |
| 1207 | |
| 1208 | for_primary_ifa(in_dev) { |
| 1209 | if (ifa->ifa_scope > scope) |
| 1210 | continue; |
| 1211 | if (!dst || inet_ifa_match(dst, ifa)) { |
| 1212 | addr = ifa->ifa_local; |
| 1213 | break; |
| 1214 | } |
| 1215 | if (!addr) |
| 1216 | addr = ifa->ifa_local; |
| 1217 | } endfor_ifa(in_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | |
| 1219 | if (addr) |
Eric Dumazet | c6d14c8 | 2009-11-04 05:43:23 -0800 | [diff] [blame] | 1220 | goto out_unlock; |
Eric Dumazet | 9f9354b | 2009-11-04 22:05:10 -0800 | [diff] [blame] | 1221 | no_in_dev: |
David Ahern | 3f2fb9a | 2016-02-24 11:47:02 -0800 | [diff] [blame] | 1222 | master_idx = l3mdev_master_ifindex_rcu(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1223 | |
David Lamparter | 17b693c | 2016-02-24 11:47:03 -0800 | [diff] [blame] | 1224 | /* For VRFs, the VRF device takes the place of the loopback device, |
| 1225 | * with addresses on it being preferred. Note in such cases the |
| 1226 | * loopback device will be among the devices that fail the master_idx |
| 1227 | * equality check in the loop below. |
| 1228 | */ |
| 1229 | if (master_idx && |
| 1230 | (dev = dev_get_by_index_rcu(net, master_idx)) && |
| 1231 | (in_dev = __in_dev_get_rcu(dev))) { |
| 1232 | for_primary_ifa(in_dev) { |
| 1233 | if (ifa->ifa_scope != RT_SCOPE_LINK && |
| 1234 | ifa->ifa_scope <= scope) { |
| 1235 | addr = ifa->ifa_local; |
| 1236 | goto out_unlock; |
| 1237 | } |
| 1238 | } endfor_ifa(in_dev); |
| 1239 | } |
| 1240 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | /* Not loopback addresses on loopback should be preferred |
Stephen Hemminger | ca9f1fd | 2015-02-14 13:47:54 -0500 | [diff] [blame] | 1242 | in this case. It is important that lo is the first interface |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1243 | in dev_base list. |
| 1244 | */ |
Eric Dumazet | c6d14c8 | 2009-11-04 05:43:23 -0800 | [diff] [blame] | 1245 | for_each_netdev_rcu(net, dev) { |
David Ahern | 3f2fb9a | 2016-02-24 11:47:02 -0800 | [diff] [blame] | 1246 | if (l3mdev_master_ifindex_rcu(dev) != master_idx) |
| 1247 | continue; |
| 1248 | |
Eric Dumazet | 9f9354b | 2009-11-04 22:05:10 -0800 | [diff] [blame] | 1249 | in_dev = __in_dev_get_rcu(dev); |
| 1250 | if (!in_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1251 | continue; |
| 1252 | |
| 1253 | for_primary_ifa(in_dev) { |
| 1254 | if (ifa->ifa_scope != RT_SCOPE_LINK && |
| 1255 | ifa->ifa_scope <= scope) { |
| 1256 | addr = ifa->ifa_local; |
Eric Dumazet | c6d14c8 | 2009-11-04 05:43:23 -0800 | [diff] [blame] | 1257 | goto out_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | } |
| 1259 | } endfor_ifa(in_dev); |
| 1260 | } |
Eric Dumazet | c6d14c8 | 2009-11-04 05:43:23 -0800 | [diff] [blame] | 1261 | out_unlock: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | return addr; |
| 1264 | } |
Eric Dumazet | 9f9354b | 2009-11-04 22:05:10 -0800 | [diff] [blame] | 1265 | EXPORT_SYMBOL(inet_select_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | |
Al Viro | 60cad5d | 2006-09-26 22:17:09 -0700 | [diff] [blame] | 1267 | static __be32 confirm_addr_indev(struct in_device *in_dev, __be32 dst, |
| 1268 | __be32 local, int scope) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1269 | { |
| 1270 | int same = 0; |
Al Viro | a144ea4 | 2006-09-28 18:00:55 -0700 | [diff] [blame] | 1271 | __be32 addr = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | |
| 1273 | for_ifa(in_dev) { |
| 1274 | if (!addr && |
| 1275 | (local == ifa->ifa_local || !local) && |
| 1276 | ifa->ifa_scope <= scope) { |
| 1277 | addr = ifa->ifa_local; |
| 1278 | if (same) |
| 1279 | break; |
| 1280 | } |
| 1281 | if (!same) { |
| 1282 | same = (!local || inet_ifa_match(local, ifa)) && |
| 1283 | (!dst || inet_ifa_match(dst, ifa)); |
| 1284 | if (same && addr) { |
| 1285 | if (local || !dst) |
| 1286 | break; |
| 1287 | /* Is the selected addr into dst subnet? */ |
| 1288 | if (inet_ifa_match(addr, ifa)) |
| 1289 | break; |
| 1290 | /* No, then can we use new local src? */ |
| 1291 | if (ifa->ifa_scope <= scope) { |
| 1292 | addr = ifa->ifa_local; |
| 1293 | break; |
| 1294 | } |
| 1295 | /* search for large dst subnet for addr */ |
| 1296 | same = 0; |
| 1297 | } |
| 1298 | } |
| 1299 | } endfor_ifa(in_dev); |
| 1300 | |
Eric Dumazet | 9f9354b | 2009-11-04 22:05:10 -0800 | [diff] [blame] | 1301 | return same ? addr : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1302 | } |
| 1303 | |
| 1304 | /* |
| 1305 | * Confirm that local IP address exists using wildcards: |
Nicolas Dichtel | b601fa19 | 2013-12-10 15:02:40 +0100 | [diff] [blame] | 1306 | * - net: netns to check, cannot be NULL |
| 1307 | * - in_dev: only on this interface, NULL=any interface |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | * - dst: only in the same subnet as dst, 0=any dst |
| 1309 | * - local: address, 0=autoselect the local address |
| 1310 | * - scope: maximum allowed scope value for the local address |
| 1311 | */ |
Nicolas Dichtel | b601fa19 | 2013-12-10 15:02:40 +0100 | [diff] [blame] | 1312 | __be32 inet_confirm_addr(struct net *net, struct in_device *in_dev, |
Denis V. Lunev | 9bd85e3 | 2008-01-14 23:05:55 -0800 | [diff] [blame] | 1313 | __be32 dst, __be32 local, int scope) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | { |
Al Viro | 60cad5d | 2006-09-26 22:17:09 -0700 | [diff] [blame] | 1315 | __be32 addr = 0; |
Denis V. Lunev | 9bd85e3 | 2008-01-14 23:05:55 -0800 | [diff] [blame] | 1316 | struct net_device *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1317 | |
Ian Morris | 00db412 | 2015-04-03 09:17:27 +0100 | [diff] [blame] | 1318 | if (in_dev) |
Denis V. Lunev | 9bd85e3 | 2008-01-14 23:05:55 -0800 | [diff] [blame] | 1319 | return confirm_addr_indev(in_dev, dst, local, scope); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1320 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1321 | rcu_read_lock(); |
Eric Dumazet | c6d14c8 | 2009-11-04 05:43:23 -0800 | [diff] [blame] | 1322 | for_each_netdev_rcu(net, dev) { |
Eric Dumazet | 9f9354b | 2009-11-04 22:05:10 -0800 | [diff] [blame] | 1323 | in_dev = __in_dev_get_rcu(dev); |
| 1324 | if (in_dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1325 | addr = confirm_addr_indev(in_dev, dst, local, scope); |
| 1326 | if (addr) |
| 1327 | break; |
| 1328 | } |
| 1329 | } |
| 1330 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | |
| 1332 | return addr; |
| 1333 | } |
Andy Gospodarek | eaddcd7 | 2012-03-22 16:14:29 +0000 | [diff] [blame] | 1334 | EXPORT_SYMBOL(inet_confirm_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1335 | |
| 1336 | /* |
| 1337 | * Device notifier |
| 1338 | */ |
| 1339 | |
| 1340 | int register_inetaddr_notifier(struct notifier_block *nb) |
| 1341 | { |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 1342 | return blocking_notifier_chain_register(&inetaddr_chain, nb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1343 | } |
Eric Dumazet | 9f9354b | 2009-11-04 22:05:10 -0800 | [diff] [blame] | 1344 | EXPORT_SYMBOL(register_inetaddr_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | |
| 1346 | int unregister_inetaddr_notifier(struct notifier_block *nb) |
| 1347 | { |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 1348 | return blocking_notifier_chain_unregister(&inetaddr_chain, nb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1349 | } |
Eric Dumazet | 9f9354b | 2009-11-04 22:05:10 -0800 | [diff] [blame] | 1350 | EXPORT_SYMBOL(unregister_inetaddr_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | |
Eric Dumazet | 9f9354b | 2009-11-04 22:05:10 -0800 | [diff] [blame] | 1352 | /* Rename ifa_labels for a device name change. Make some effort to preserve |
| 1353 | * existing alias numbering and to create unique labels if possible. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | */ |
| 1355 | 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] | 1356 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | struct in_ifaddr *ifa; |
| 1358 | int named = 0; |
| 1359 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1360 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { |
| 1361 | char old[IFNAMSIZ], *dot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | |
| 1363 | memcpy(old, ifa->ifa_label, IFNAMSIZ); |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1364 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | if (named++ == 0) |
Thomas Graf | 573bf47 | 2008-06-10 15:40:04 -0700 | [diff] [blame] | 1366 | goto skip; |
Mark McLoughlin | 44344b2 | 2008-01-04 00:56:25 -0800 | [diff] [blame] | 1367 | dot = strchr(old, ':'); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 1368 | if (!dot) { |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1369 | sprintf(old, ":%d", named); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | dot = old; |
| 1371 | } |
Eric Dumazet | 9f9354b | 2009-11-04 22:05:10 -0800 | [diff] [blame] | 1372 | if (strlen(dot) + strlen(dev->name) < IFNAMSIZ) |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1373 | strcat(ifa->ifa_label, dot); |
Eric Dumazet | 9f9354b | 2009-11-04 22:05:10 -0800 | [diff] [blame] | 1374 | else |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1375 | strcpy(ifa->ifa_label + (IFNAMSIZ - strlen(dot) - 1), dot); |
Thomas Graf | 573bf47 | 2008-06-10 15:40:04 -0700 | [diff] [blame] | 1376 | skip: |
| 1377 | rtmsg_ifa(RTM_NEWADDR, ifa, NULL, 0); |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1378 | } |
| 1379 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1380 | |
Eric Dumazet | 4038499 | 2012-08-03 21:06:50 +0000 | [diff] [blame] | 1381 | static bool inetdev_valid_mtu(unsigned int mtu) |
Breno Leitao | 0677084 | 2008-09-02 17:28:58 -0700 | [diff] [blame] | 1382 | { |
| 1383 | return mtu >= 68; |
| 1384 | } |
| 1385 | |
Ian Campbell | d11327ad | 2011-02-11 07:44:16 +0000 | [diff] [blame] | 1386 | static void inetdev_send_gratuitous_arp(struct net_device *dev, |
| 1387 | struct in_device *in_dev) |
| 1388 | |
| 1389 | { |
Zoltan Kiss | b76d078 | 2011-07-24 13:09:30 +0000 | [diff] [blame] | 1390 | struct in_ifaddr *ifa; |
Ian Campbell | d11327ad | 2011-02-11 07:44:16 +0000 | [diff] [blame] | 1391 | |
Zoltan Kiss | b76d078 | 2011-07-24 13:09:30 +0000 | [diff] [blame] | 1392 | for (ifa = in_dev->ifa_list; ifa; |
| 1393 | ifa = ifa->ifa_next) { |
| 1394 | arp_send(ARPOP_REQUEST, ETH_P_ARP, |
| 1395 | ifa->ifa_local, dev, |
| 1396 | ifa->ifa_local, NULL, |
| 1397 | dev->dev_addr, NULL); |
| 1398 | } |
Ian Campbell | d11327ad | 2011-02-11 07:44:16 +0000 | [diff] [blame] | 1399 | } |
| 1400 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1401 | /* Called only under RTNL semaphore */ |
| 1402 | |
| 1403 | static int inetdev_event(struct notifier_block *this, unsigned long event, |
| 1404 | void *ptr) |
| 1405 | { |
Jiri Pirko | 351638e | 2013-05-28 01:30:21 +0000 | [diff] [blame] | 1406 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
Eric Dumazet | 748e2d9 | 2012-08-22 21:50:59 +0000 | [diff] [blame] | 1407 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1408 | |
| 1409 | ASSERT_RTNL(); |
| 1410 | |
| 1411 | if (!in_dev) { |
Herbert Xu | 8030f54 | 2007-02-22 01:53:47 +0900 | [diff] [blame] | 1412 | if (event == NETDEV_REGISTER) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1413 | in_dev = inetdev_init(dev); |
WANG Cong | 20e61da | 2014-07-25 15:25:08 -0700 | [diff] [blame] | 1414 | if (IS_ERR(in_dev)) |
| 1415 | return notifier_from_errno(PTR_ERR(in_dev)); |
Eric W. Biederman | 0cc217e | 2007-09-26 22:10:06 -0700 | [diff] [blame] | 1416 | if (dev->flags & IFF_LOOPBACK) { |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 1417 | IN_DEV_CONF_SET(in_dev, NOXFRM, 1); |
| 1418 | IN_DEV_CONF_SET(in_dev, NOPOLICY, 1); |
Herbert Xu | 8030f54 | 2007-02-22 01:53:47 +0900 | [diff] [blame] | 1419 | } |
Breno Leitao | 0677084 | 2008-09-02 17:28:58 -0700 | [diff] [blame] | 1420 | } else if (event == NETDEV_CHANGEMTU) { |
| 1421 | /* Re-enabling IP */ |
| 1422 | if (inetdev_valid_mtu(dev->mtu)) |
| 1423 | in_dev = inetdev_init(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1424 | } |
| 1425 | goto out; |
| 1426 | } |
| 1427 | |
| 1428 | switch (event) { |
| 1429 | case NETDEV_REGISTER: |
Joe Perches | 91df42b | 2012-05-15 14:11:54 +0000 | [diff] [blame] | 1430 | pr_debug("%s: bug\n", __func__); |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 1431 | RCU_INIT_POINTER(dev->ip_ptr, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1432 | break; |
| 1433 | case NETDEV_UP: |
Breno Leitao | 0677084 | 2008-09-02 17:28:58 -0700 | [diff] [blame] | 1434 | if (!inetdev_valid_mtu(dev->mtu)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | break; |
Eric W. Biederman | 0cc217e | 2007-09-26 22:10:06 -0700 | [diff] [blame] | 1436 | if (dev->flags & IFF_LOOPBACK) { |
Eric Dumazet | 9f9354b | 2009-11-04 22:05:10 -0800 | [diff] [blame] | 1437 | struct in_ifaddr *ifa = inet_alloc_ifa(); |
| 1438 | |
| 1439 | if (ifa) { |
David S. Miller | fd23c3b | 2011-02-18 12:42:28 -0800 | [diff] [blame] | 1440 | INIT_HLIST_NODE(&ifa->hash); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | ifa->ifa_local = |
| 1442 | ifa->ifa_address = htonl(INADDR_LOOPBACK); |
| 1443 | ifa->ifa_prefixlen = 8; |
| 1444 | ifa->ifa_mask = inet_make_mask(8); |
| 1445 | in_dev_hold(in_dev); |
| 1446 | ifa->ifa_dev = in_dev; |
| 1447 | ifa->ifa_scope = RT_SCOPE_HOST; |
| 1448 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 1449 | set_ifa_lifetime(ifa, INFINITY_LIFE_TIME, |
| 1450 | INFINITY_LIFE_TIME); |
Jiri Pirko | dfd1582 | 2014-01-07 15:55:45 +0100 | [diff] [blame] | 1451 | ipv4_devconf_setall(in_dev); |
| 1452 | neigh_parms_data_state_setall(in_dev->arp_parms); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1453 | inet_insert_ifa(ifa); |
| 1454 | } |
| 1455 | } |
| 1456 | ip_mc_up(in_dev); |
Stephen Hemminger | eefef1c | 2009-02-01 01:04:33 -0800 | [diff] [blame] | 1457 | /* fall through */ |
| 1458 | case NETDEV_CHANGEADDR: |
Ian Campbell | d11327ad | 2011-02-11 07:44:16 +0000 | [diff] [blame] | 1459 | if (!IN_DEV_ARP_NOTIFY(in_dev)) |
| 1460 | break; |
| 1461 | /* fall through */ |
| 1462 | case NETDEV_NOTIFY_PEERS: |
Stephen Hemminger | a21090c | 2009-10-07 03:18:17 -0700 | [diff] [blame] | 1463 | /* Send gratuitous ARP to notify of link change */ |
Ian Campbell | d11327ad | 2011-02-11 07:44:16 +0000 | [diff] [blame] | 1464 | inetdev_send_gratuitous_arp(dev, in_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1465 | break; |
| 1466 | case NETDEV_DOWN: |
| 1467 | ip_mc_down(in_dev); |
| 1468 | break; |
Jiri Pirko | 93d9b7d | 2010-03-10 10:28:56 +0000 | [diff] [blame] | 1469 | case NETDEV_PRE_TYPE_CHANGE: |
Moni Shoua | 75c7850 | 2009-09-15 02:37:40 -0700 | [diff] [blame] | 1470 | ip_mc_unmap(in_dev); |
| 1471 | break; |
Jiri Pirko | 93d9b7d | 2010-03-10 10:28:56 +0000 | [diff] [blame] | 1472 | case NETDEV_POST_TYPE_CHANGE: |
Moni Shoua | 75c7850 | 2009-09-15 02:37:40 -0700 | [diff] [blame] | 1473 | ip_mc_remap(in_dev); |
| 1474 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1475 | case NETDEV_CHANGEMTU: |
Breno Leitao | 0677084 | 2008-09-02 17:28:58 -0700 | [diff] [blame] | 1476 | if (inetdev_valid_mtu(dev->mtu)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | break; |
Breno Leitao | 0677084 | 2008-09-02 17:28:58 -0700 | [diff] [blame] | 1478 | /* disable IP when MTU is not enough */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | case NETDEV_UNREGISTER: |
| 1480 | inetdev_destroy(in_dev); |
| 1481 | break; |
| 1482 | case NETDEV_CHANGENAME: |
| 1483 | /* Do not notify about label change, this event is |
| 1484 | * not interesting to applications using netlink. |
| 1485 | */ |
| 1486 | inetdev_changename(dev, in_dev); |
| 1487 | |
Pavel Emelyanov | 51602b2 | 2007-12-11 02:17:40 -0800 | [diff] [blame] | 1488 | devinet_sysctl_unregister(in_dev); |
Pavel Emelyanov | 66f27a5 | 2007-12-02 00:55:54 +1100 | [diff] [blame] | 1489 | devinet_sysctl_register(in_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1490 | break; |
| 1491 | } |
| 1492 | out: |
| 1493 | return NOTIFY_DONE; |
| 1494 | } |
| 1495 | |
| 1496 | static struct notifier_block ip_netdev_notifier = { |
Jianjun Kong | 539afed | 2008-11-03 02:48:48 -0800 | [diff] [blame] | 1497 | .notifier_call = inetdev_event, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1498 | }; |
| 1499 | |
Eric Dumazet | 4038499 | 2012-08-03 21:06:50 +0000 | [diff] [blame] | 1500 | static size_t inet_nlmsg_size(void) |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 1501 | { |
| 1502 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
| 1503 | + nla_total_size(4) /* IFA_ADDRESS */ |
| 1504 | + nla_total_size(4) /* IFA_LOCAL */ |
| 1505 | + nla_total_size(4) /* IFA_BROADCAST */ |
Jiri Pirko | ad6c813 | 2013-12-08 12:16:10 +0100 | [diff] [blame] | 1506 | + nla_total_size(IFNAMSIZ) /* IFA_LABEL */ |
Geert Uytterhoeven | 63b5f15 | 2014-02-05 08:38:25 +0100 | [diff] [blame] | 1507 | + nla_total_size(4) /* IFA_FLAGS */ |
| 1508 | + nla_total_size(sizeof(struct ifa_cacheinfo)); /* IFA_CACHEINFO */ |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 1509 | } |
| 1510 | |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 1511 | static inline u32 cstamp_delta(unsigned long cstamp) |
| 1512 | { |
| 1513 | return (cstamp - INITIAL_JIFFIES) * 100UL / HZ; |
| 1514 | } |
| 1515 | |
| 1516 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
| 1517 | unsigned long tstamp, u32 preferred, u32 valid) |
| 1518 | { |
| 1519 | struct ifa_cacheinfo ci; |
| 1520 | |
| 1521 | ci.cstamp = cstamp_delta(cstamp); |
| 1522 | ci.tstamp = cstamp_delta(tstamp); |
| 1523 | ci.ifa_prefered = preferred; |
| 1524 | ci.ifa_valid = valid; |
| 1525 | |
| 1526 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); |
| 1527 | } |
| 1528 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1529 | static int inet_fill_ifaddr(struct sk_buff *skb, struct in_ifaddr *ifa, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1530 | u32 portid, u32 seq, int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1531 | { |
| 1532 | struct ifaddrmsg *ifm; |
| 1533 | struct nlmsghdr *nlh; |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 1534 | u32 preferred, valid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1535 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1536 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*ifm), flags); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 1537 | if (!nlh) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 1538 | return -EMSGSIZE; |
Thomas Graf | 47f6851 | 2006-08-04 23:04:36 -0700 | [diff] [blame] | 1539 | |
| 1540 | ifm = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1541 | ifm->ifa_family = AF_INET; |
| 1542 | ifm->ifa_prefixlen = ifa->ifa_prefixlen; |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 1543 | ifm->ifa_flags = ifa->ifa_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1544 | ifm->ifa_scope = ifa->ifa_scope; |
| 1545 | ifm->ifa_index = ifa->ifa_dev->dev->ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1546 | |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 1547 | if (!(ifm->ifa_flags & IFA_F_PERMANENT)) { |
| 1548 | preferred = ifa->ifa_preferred_lft; |
| 1549 | valid = ifa->ifa_valid_lft; |
| 1550 | if (preferred != INFINITY_LIFE_TIME) { |
| 1551 | long tval = (jiffies - ifa->ifa_tstamp) / HZ; |
| 1552 | |
| 1553 | if (preferred > tval) |
| 1554 | preferred -= tval; |
| 1555 | else |
| 1556 | preferred = 0; |
| 1557 | if (valid != INFINITY_LIFE_TIME) { |
| 1558 | if (valid > tval) |
| 1559 | valid -= tval; |
| 1560 | else |
| 1561 | valid = 0; |
| 1562 | } |
| 1563 | } |
| 1564 | } else { |
| 1565 | preferred = INFINITY_LIFE_TIME; |
| 1566 | valid = INFINITY_LIFE_TIME; |
| 1567 | } |
David S. Miller | f3756b7 | 2012-04-01 20:39:02 -0400 | [diff] [blame] | 1568 | if ((ifa->ifa_address && |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 1569 | nla_put_in_addr(skb, IFA_ADDRESS, ifa->ifa_address)) || |
David S. Miller | f3756b7 | 2012-04-01 20:39:02 -0400 | [diff] [blame] | 1570 | (ifa->ifa_local && |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 1571 | nla_put_in_addr(skb, IFA_LOCAL, ifa->ifa_local)) || |
David S. Miller | f3756b7 | 2012-04-01 20:39:02 -0400 | [diff] [blame] | 1572 | (ifa->ifa_broadcast && |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 1573 | nla_put_in_addr(skb, IFA_BROADCAST, ifa->ifa_broadcast)) || |
David S. Miller | f3756b7 | 2012-04-01 20:39:02 -0400 | [diff] [blame] | 1574 | (ifa->ifa_label[0] && |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 1575 | nla_put_string(skb, IFA_LABEL, ifa->ifa_label)) || |
Jiri Pirko | ad6c813 | 2013-12-08 12:16:10 +0100 | [diff] [blame] | 1576 | nla_put_u32(skb, IFA_FLAGS, ifa->ifa_flags) || |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 1577 | put_cacheinfo(skb, ifa->ifa_cstamp, ifa->ifa_tstamp, |
| 1578 | preferred, valid)) |
David S. Miller | f3756b7 | 2012-04-01 20:39:02 -0400 | [diff] [blame] | 1579 | goto nla_put_failure; |
Thomas Graf | 47f6851 | 2006-08-04 23:04:36 -0700 | [diff] [blame] | 1580 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 1581 | nlmsg_end(skb, nlh); |
| 1582 | return 0; |
Thomas Graf | 47f6851 | 2006-08-04 23:04:36 -0700 | [diff] [blame] | 1583 | |
| 1584 | nla_put_failure: |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 1585 | nlmsg_cancel(skb, nlh); |
| 1586 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1587 | } |
| 1588 | |
| 1589 | static int inet_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) |
| 1590 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 1591 | struct net *net = sock_net(skb->sk); |
Eric Dumazet | eec4df9 | 2009-11-12 07:44:25 +0000 | [diff] [blame] | 1592 | int h, s_h; |
| 1593 | int idx, s_idx; |
| 1594 | int ip_idx, s_ip_idx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1595 | struct net_device *dev; |
| 1596 | struct in_device *in_dev; |
| 1597 | struct in_ifaddr *ifa; |
Eric Dumazet | eec4df9 | 2009-11-12 07:44:25 +0000 | [diff] [blame] | 1598 | struct hlist_head *head; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1599 | |
Eric Dumazet | eec4df9 | 2009-11-12 07:44:25 +0000 | [diff] [blame] | 1600 | s_h = cb->args[0]; |
| 1601 | s_idx = idx = cb->args[1]; |
| 1602 | s_ip_idx = ip_idx = cb->args[2]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1603 | |
Eric Dumazet | eec4df9 | 2009-11-12 07:44:25 +0000 | [diff] [blame] | 1604 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
| 1605 | idx = 0; |
| 1606 | head = &net->dev_index_head[h]; |
| 1607 | rcu_read_lock(); |
Nicolas Dichtel | 0465277 | 2013-03-22 06:28:42 +0000 | [diff] [blame] | 1608 | cb->seq = atomic_read(&net->ipv4.dev_addr_genid) ^ |
| 1609 | net->dev_base_seq; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1610 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
Eric Dumazet | eec4df9 | 2009-11-12 07:44:25 +0000 | [diff] [blame] | 1611 | if (idx < s_idx) |
| 1612 | goto cont; |
Patrick McHardy | 4b97efd | 2010-03-26 20:27:49 -0700 | [diff] [blame] | 1613 | if (h > s_h || idx > s_idx) |
Eric Dumazet | eec4df9 | 2009-11-12 07:44:25 +0000 | [diff] [blame] | 1614 | s_ip_idx = 0; |
| 1615 | in_dev = __in_dev_get_rcu(dev); |
| 1616 | if (!in_dev) |
| 1617 | goto cont; |
| 1618 | |
| 1619 | for (ifa = in_dev->ifa_list, ip_idx = 0; ifa; |
| 1620 | ifa = ifa->ifa_next, ip_idx++) { |
| 1621 | if (ip_idx < s_ip_idx) |
| 1622 | continue; |
| 1623 | if (inet_fill_ifaddr(skb, ifa, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1624 | NETLINK_CB(cb->skb).portid, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1625 | cb->nlh->nlmsg_seq, |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 1626 | RTM_NEWADDR, NLM_F_MULTI) < 0) { |
Eric Dumazet | eec4df9 | 2009-11-12 07:44:25 +0000 | [diff] [blame] | 1627 | rcu_read_unlock(); |
| 1628 | goto done; |
| 1629 | } |
Nicolas Dichtel | 0465277 | 2013-03-22 06:28:42 +0000 | [diff] [blame] | 1630 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
Eric Dumazet | eec4df9 | 2009-11-12 07:44:25 +0000 | [diff] [blame] | 1631 | } |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1632 | cont: |
Eric Dumazet | eec4df9 | 2009-11-12 07:44:25 +0000 | [diff] [blame] | 1633 | idx++; |
| 1634 | } |
| 1635 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1636 | } |
| 1637 | |
| 1638 | done: |
Eric Dumazet | eec4df9 | 2009-11-12 07:44:25 +0000 | [diff] [blame] | 1639 | cb->args[0] = h; |
| 1640 | cb->args[1] = idx; |
| 1641 | cb->args[2] = ip_idx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1642 | |
| 1643 | return skb->len; |
| 1644 | } |
| 1645 | |
Jianjun Kong | 539afed | 2008-11-03 02:48:48 -0800 | [diff] [blame] | 1646 | static void rtmsg_ifa(int event, struct in_ifaddr *ifa, struct nlmsghdr *nlh, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1647 | u32 portid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1648 | { |
Thomas Graf | 47f6851 | 2006-08-04 23:04:36 -0700 | [diff] [blame] | 1649 | struct sk_buff *skb; |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 1650 | u32 seq = nlh ? nlh->nlmsg_seq : 0; |
| 1651 | int err = -ENOBUFS; |
Denis V. Lunev | 4b8aa9a | 2008-01-31 18:47:40 -0800 | [diff] [blame] | 1652 | struct net *net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1653 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1654 | net = dev_net(ifa->ifa_dev->dev); |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 1655 | skb = nlmsg_new(inet_nlmsg_size(), GFP_KERNEL); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 1656 | if (!skb) |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 1657 | goto errout; |
| 1658 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1659 | err = inet_fill_ifaddr(skb, ifa, portid, seq, event, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 1660 | if (err < 0) { |
| 1661 | /* -EMSGSIZE implies BUG in inet_nlmsg_size() */ |
| 1662 | WARN_ON(err == -EMSGSIZE); |
| 1663 | kfree_skb(skb); |
| 1664 | goto errout; |
| 1665 | } |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1666 | rtnl_notify(skb, net, portid, RTNLGRP_IPV4_IFADDR, nlh, GFP_KERNEL); |
Pablo Neira Ayuso | 1ce85fe | 2009-02-24 23:18:28 -0800 | [diff] [blame] | 1667 | return; |
Thomas Graf | d6062cb | 2006-08-15 00:33:59 -0700 | [diff] [blame] | 1668 | errout: |
| 1669 | if (err < 0) |
Denis V. Lunev | 4b8aa9a | 2008-01-31 18:47:40 -0800 | [diff] [blame] | 1670 | rtnl_set_sk_err(net, RTNLGRP_IPV4_IFADDR, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1671 | } |
| 1672 | |
Arad, Ronen | b1974ed | 2015-10-19 09:23:28 -0700 | [diff] [blame] | 1673 | static size_t inet_get_link_af_size(const struct net_device *dev, |
| 1674 | u32 ext_filter_mask) |
Thomas Graf | 9f0f727 | 2010-11-16 04:32:48 +0000 | [diff] [blame] | 1675 | { |
Eric Dumazet | 1fc19af | 2011-05-09 20:55:03 -0700 | [diff] [blame] | 1676 | struct in_device *in_dev = rcu_dereference_rtnl(dev->ip_ptr); |
Thomas Graf | 9f0f727 | 2010-11-16 04:32:48 +0000 | [diff] [blame] | 1677 | |
| 1678 | if (!in_dev) |
| 1679 | return 0; |
| 1680 | |
| 1681 | return nla_total_size(IPV4_DEVCONF_MAX * 4); /* IFLA_INET_CONF */ |
| 1682 | } |
| 1683 | |
Sowmini Varadhan | d5566fd | 2015-09-11 16:48:48 -0400 | [diff] [blame] | 1684 | static int inet_fill_link_af(struct sk_buff *skb, const struct net_device *dev, |
| 1685 | u32 ext_filter_mask) |
Thomas Graf | 9f0f727 | 2010-11-16 04:32:48 +0000 | [diff] [blame] | 1686 | { |
Eric Dumazet | 1fc19af | 2011-05-09 20:55:03 -0700 | [diff] [blame] | 1687 | struct in_device *in_dev = rcu_dereference_rtnl(dev->ip_ptr); |
Thomas Graf | 9f0f727 | 2010-11-16 04:32:48 +0000 | [diff] [blame] | 1688 | struct nlattr *nla; |
| 1689 | int i; |
| 1690 | |
| 1691 | if (!in_dev) |
| 1692 | return -ENODATA; |
| 1693 | |
| 1694 | nla = nla_reserve(skb, IFLA_INET_CONF, IPV4_DEVCONF_MAX * 4); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 1695 | if (!nla) |
Thomas Graf | 9f0f727 | 2010-11-16 04:32:48 +0000 | [diff] [blame] | 1696 | return -EMSGSIZE; |
| 1697 | |
| 1698 | for (i = 0; i < IPV4_DEVCONF_MAX; i++) |
| 1699 | ((u32 *) nla_data(nla))[i] = in_dev->cnf.data[i]; |
| 1700 | |
| 1701 | return 0; |
| 1702 | } |
| 1703 | |
| 1704 | static const struct nla_policy inet_af_policy[IFLA_INET_MAX+1] = { |
| 1705 | [IFLA_INET_CONF] = { .type = NLA_NESTED }, |
| 1706 | }; |
| 1707 | |
Thomas Graf | cf7afbf | 2010-11-22 01:31:54 +0000 | [diff] [blame] | 1708 | static int inet_validate_link_af(const struct net_device *dev, |
| 1709 | const struct nlattr *nla) |
Thomas Graf | 9f0f727 | 2010-11-16 04:32:48 +0000 | [diff] [blame] | 1710 | { |
Thomas Graf | 9f0f727 | 2010-11-16 04:32:48 +0000 | [diff] [blame] | 1711 | struct nlattr *a, *tb[IFLA_INET_MAX+1]; |
| 1712 | int err, rem; |
| 1713 | |
Eric Dumazet | f7fce74 | 2010-12-01 06:03:06 +0000 | [diff] [blame] | 1714 | if (dev && !__in_dev_get_rtnl(dev)) |
Thomas Graf | cf7afbf | 2010-11-22 01:31:54 +0000 | [diff] [blame] | 1715 | return -EAFNOSUPPORT; |
Thomas Graf | 9f0f727 | 2010-11-16 04:32:48 +0000 | [diff] [blame] | 1716 | |
| 1717 | err = nla_parse_nested(tb, IFLA_INET_MAX, nla, inet_af_policy); |
| 1718 | if (err < 0) |
| 1719 | return err; |
| 1720 | |
| 1721 | if (tb[IFLA_INET_CONF]) { |
| 1722 | nla_for_each_nested(a, tb[IFLA_INET_CONF], rem) { |
| 1723 | int cfgid = nla_type(a); |
| 1724 | |
| 1725 | if (nla_len(a) < 4) |
| 1726 | return -EINVAL; |
| 1727 | |
| 1728 | if (cfgid <= 0 || cfgid > IPV4_DEVCONF_MAX) |
| 1729 | return -EINVAL; |
| 1730 | } |
| 1731 | } |
| 1732 | |
Thomas Graf | cf7afbf | 2010-11-22 01:31:54 +0000 | [diff] [blame] | 1733 | return 0; |
| 1734 | } |
| 1735 | |
| 1736 | static int inet_set_link_af(struct net_device *dev, const struct nlattr *nla) |
| 1737 | { |
Eric Dumazet | f7fce74 | 2010-12-01 06:03:06 +0000 | [diff] [blame] | 1738 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
Thomas Graf | cf7afbf | 2010-11-22 01:31:54 +0000 | [diff] [blame] | 1739 | struct nlattr *a, *tb[IFLA_INET_MAX+1]; |
| 1740 | int rem; |
| 1741 | |
| 1742 | if (!in_dev) |
| 1743 | return -EAFNOSUPPORT; |
| 1744 | |
| 1745 | if (nla_parse_nested(tb, IFLA_INET_MAX, nla, NULL) < 0) |
| 1746 | BUG(); |
| 1747 | |
Thomas Graf | 9f0f727 | 2010-11-16 04:32:48 +0000 | [diff] [blame] | 1748 | if (tb[IFLA_INET_CONF]) { |
| 1749 | nla_for_each_nested(a, tb[IFLA_INET_CONF], rem) |
| 1750 | ipv4_devconf_set(in_dev, nla_type(a), nla_get_u32(a)); |
| 1751 | } |
| 1752 | |
| 1753 | return 0; |
| 1754 | } |
| 1755 | |
Nicolas Dichtel | edc9e74 | 2012-10-25 22:28:52 +0000 | [diff] [blame] | 1756 | static int inet_netconf_msgsize_devconf(int type) |
| 1757 | { |
| 1758 | int size = NLMSG_ALIGN(sizeof(struct netconfmsg)) |
| 1759 | + nla_total_size(4); /* NETCONFA_IFINDEX */ |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 1760 | bool all = false; |
Nicolas Dichtel | edc9e74 | 2012-10-25 22:28:52 +0000 | [diff] [blame] | 1761 | |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 1762 | if (type == NETCONFA_ALL) |
| 1763 | all = true; |
| 1764 | |
| 1765 | if (all || type == NETCONFA_FORWARDING) |
Nicolas Dichtel | edc9e74 | 2012-10-25 22:28:52 +0000 | [diff] [blame] | 1766 | size += nla_total_size(4); |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 1767 | if (all || type == NETCONFA_RP_FILTER) |
Nicolas Dichtel | cc535df | 2012-10-29 04:53:27 +0000 | [diff] [blame] | 1768 | size += nla_total_size(4); |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 1769 | if (all || type == NETCONFA_MC_FORWARDING) |
Nicolas Dichtel | d67b8c6 | 2012-12-04 01:13:35 +0000 | [diff] [blame] | 1770 | size += nla_total_size(4); |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 1771 | if (all || type == NETCONFA_PROXY_NEIGH) |
stephen hemminger | f085ff1 | 2013-12-12 13:06:50 -0800 | [diff] [blame] | 1772 | size += nla_total_size(4); |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 1773 | if (all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) |
Andy Gospodarek | 974d7af | 2015-07-07 13:56:57 -0400 | [diff] [blame] | 1774 | size += nla_total_size(4); |
Nicolas Dichtel | edc9e74 | 2012-10-25 22:28:52 +0000 | [diff] [blame] | 1775 | |
| 1776 | return size; |
| 1777 | } |
| 1778 | |
| 1779 | static int inet_netconf_fill_devconf(struct sk_buff *skb, int ifindex, |
| 1780 | struct ipv4_devconf *devconf, u32 portid, |
| 1781 | u32 seq, int event, unsigned int flags, |
| 1782 | int type) |
| 1783 | { |
| 1784 | struct nlmsghdr *nlh; |
| 1785 | struct netconfmsg *ncm; |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 1786 | bool all = false; |
Nicolas Dichtel | edc9e74 | 2012-10-25 22:28:52 +0000 | [diff] [blame] | 1787 | |
| 1788 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg), |
| 1789 | flags); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 1790 | if (!nlh) |
Nicolas Dichtel | edc9e74 | 2012-10-25 22:28:52 +0000 | [diff] [blame] | 1791 | return -EMSGSIZE; |
| 1792 | |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 1793 | if (type == NETCONFA_ALL) |
| 1794 | all = true; |
| 1795 | |
Nicolas Dichtel | edc9e74 | 2012-10-25 22:28:52 +0000 | [diff] [blame] | 1796 | ncm = nlmsg_data(nlh); |
| 1797 | ncm->ncm_family = AF_INET; |
| 1798 | |
| 1799 | if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0) |
| 1800 | goto nla_put_failure; |
| 1801 | |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 1802 | if ((all || type == NETCONFA_FORWARDING) && |
Nicolas Dichtel | edc9e74 | 2012-10-25 22:28:52 +0000 | [diff] [blame] | 1803 | nla_put_s32(skb, NETCONFA_FORWARDING, |
| 1804 | IPV4_DEVCONF(*devconf, FORWARDING)) < 0) |
| 1805 | goto nla_put_failure; |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 1806 | if ((all || type == NETCONFA_RP_FILTER) && |
Nicolas Dichtel | cc535df | 2012-10-29 04:53:27 +0000 | [diff] [blame] | 1807 | nla_put_s32(skb, NETCONFA_RP_FILTER, |
| 1808 | IPV4_DEVCONF(*devconf, RP_FILTER)) < 0) |
| 1809 | goto nla_put_failure; |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 1810 | if ((all || type == NETCONFA_MC_FORWARDING) && |
Nicolas Dichtel | d67b8c6 | 2012-12-04 01:13:35 +0000 | [diff] [blame] | 1811 | nla_put_s32(skb, NETCONFA_MC_FORWARDING, |
| 1812 | IPV4_DEVCONF(*devconf, MC_FORWARDING)) < 0) |
| 1813 | goto nla_put_failure; |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 1814 | if ((all || type == NETCONFA_PROXY_NEIGH) && |
stephen hemminger | 09aea5d | 2013-12-17 22:35:52 -0800 | [diff] [blame] | 1815 | nla_put_s32(skb, NETCONFA_PROXY_NEIGH, |
stephen hemminger | f085ff1 | 2013-12-12 13:06:50 -0800 | [diff] [blame] | 1816 | IPV4_DEVCONF(*devconf, PROXY_ARP)) < 0) |
| 1817 | goto nla_put_failure; |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 1818 | if ((all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) && |
Andy Gospodarek | 974d7af | 2015-07-07 13:56:57 -0400 | [diff] [blame] | 1819 | nla_put_s32(skb, NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, |
| 1820 | IPV4_DEVCONF(*devconf, IGNORE_ROUTES_WITH_LINKDOWN)) < 0) |
| 1821 | goto nla_put_failure; |
Nicolas Dichtel | edc9e74 | 2012-10-25 22:28:52 +0000 | [diff] [blame] | 1822 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 1823 | nlmsg_end(skb, nlh); |
| 1824 | return 0; |
Nicolas Dichtel | edc9e74 | 2012-10-25 22:28:52 +0000 | [diff] [blame] | 1825 | |
| 1826 | nla_put_failure: |
| 1827 | nlmsg_cancel(skb, nlh); |
| 1828 | return -EMSGSIZE; |
| 1829 | } |
| 1830 | |
Nicolas Dichtel | d67b8c6 | 2012-12-04 01:13:35 +0000 | [diff] [blame] | 1831 | void inet_netconf_notify_devconf(struct net *net, int type, int ifindex, |
| 1832 | struct ipv4_devconf *devconf) |
Nicolas Dichtel | edc9e74 | 2012-10-25 22:28:52 +0000 | [diff] [blame] | 1833 | { |
| 1834 | struct sk_buff *skb; |
| 1835 | int err = -ENOBUFS; |
| 1836 | |
| 1837 | skb = nlmsg_new(inet_netconf_msgsize_devconf(type), GFP_ATOMIC); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 1838 | if (!skb) |
Nicolas Dichtel | edc9e74 | 2012-10-25 22:28:52 +0000 | [diff] [blame] | 1839 | goto errout; |
| 1840 | |
| 1841 | err = inet_netconf_fill_devconf(skb, ifindex, devconf, 0, 0, |
| 1842 | RTM_NEWNETCONF, 0, type); |
| 1843 | if (err < 0) { |
| 1844 | /* -EMSGSIZE implies BUG in inet_netconf_msgsize_devconf() */ |
| 1845 | WARN_ON(err == -EMSGSIZE); |
| 1846 | kfree_skb(skb); |
| 1847 | goto errout; |
| 1848 | } |
| 1849 | rtnl_notify(skb, net, 0, RTNLGRP_IPV4_NETCONF, NULL, GFP_ATOMIC); |
| 1850 | return; |
| 1851 | errout: |
| 1852 | if (err < 0) |
| 1853 | rtnl_set_sk_err(net, RTNLGRP_IPV4_NETCONF, err); |
| 1854 | } |
| 1855 | |
Nicolas Dichtel | 9e55111 | 2012-10-25 22:28:53 +0000 | [diff] [blame] | 1856 | static const struct nla_policy devconf_ipv4_policy[NETCONFA_MAX+1] = { |
| 1857 | [NETCONFA_IFINDEX] = { .len = sizeof(int) }, |
| 1858 | [NETCONFA_FORWARDING] = { .len = sizeof(int) }, |
Nicolas Dichtel | cc535df | 2012-10-29 04:53:27 +0000 | [diff] [blame] | 1859 | [NETCONFA_RP_FILTER] = { .len = sizeof(int) }, |
stephen hemminger | 09aea5d | 2013-12-17 22:35:52 -0800 | [diff] [blame] | 1860 | [NETCONFA_PROXY_NEIGH] = { .len = sizeof(int) }, |
Andy Gospodarek | 974d7af | 2015-07-07 13:56:57 -0400 | [diff] [blame] | 1861 | [NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN] = { .len = sizeof(int) }, |
Nicolas Dichtel | 9e55111 | 2012-10-25 22:28:53 +0000 | [diff] [blame] | 1862 | }; |
| 1863 | |
| 1864 | static int inet_netconf_get_devconf(struct sk_buff *in_skb, |
Thomas Graf | 661d296 | 2013-03-21 07:45:29 +0000 | [diff] [blame] | 1865 | struct nlmsghdr *nlh) |
Nicolas Dichtel | 9e55111 | 2012-10-25 22:28:53 +0000 | [diff] [blame] | 1866 | { |
| 1867 | struct net *net = sock_net(in_skb->sk); |
| 1868 | struct nlattr *tb[NETCONFA_MAX+1]; |
| 1869 | struct netconfmsg *ncm; |
| 1870 | struct sk_buff *skb; |
| 1871 | struct ipv4_devconf *devconf; |
| 1872 | struct in_device *in_dev; |
| 1873 | struct net_device *dev; |
| 1874 | int ifindex; |
| 1875 | int err; |
| 1876 | |
| 1877 | err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX, |
| 1878 | devconf_ipv4_policy); |
| 1879 | if (err < 0) |
| 1880 | goto errout; |
| 1881 | |
Anton Protopopov | a97eb33 | 2016-02-16 21:43:16 -0500 | [diff] [blame] | 1882 | err = -EINVAL; |
Nicolas Dichtel | 9e55111 | 2012-10-25 22:28:53 +0000 | [diff] [blame] | 1883 | if (!tb[NETCONFA_IFINDEX]) |
| 1884 | goto errout; |
| 1885 | |
| 1886 | ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]); |
| 1887 | switch (ifindex) { |
| 1888 | case NETCONFA_IFINDEX_ALL: |
| 1889 | devconf = net->ipv4.devconf_all; |
| 1890 | break; |
| 1891 | case NETCONFA_IFINDEX_DEFAULT: |
| 1892 | devconf = net->ipv4.devconf_dflt; |
| 1893 | break; |
| 1894 | default: |
| 1895 | dev = __dev_get_by_index(net, ifindex); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 1896 | if (!dev) |
Nicolas Dichtel | 9e55111 | 2012-10-25 22:28:53 +0000 | [diff] [blame] | 1897 | goto errout; |
| 1898 | in_dev = __in_dev_get_rtnl(dev); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 1899 | if (!in_dev) |
Nicolas Dichtel | 9e55111 | 2012-10-25 22:28:53 +0000 | [diff] [blame] | 1900 | goto errout; |
| 1901 | devconf = &in_dev->cnf; |
| 1902 | break; |
| 1903 | } |
| 1904 | |
| 1905 | err = -ENOBUFS; |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 1906 | skb = nlmsg_new(inet_netconf_msgsize_devconf(NETCONFA_ALL), GFP_ATOMIC); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 1907 | if (!skb) |
Nicolas Dichtel | 9e55111 | 2012-10-25 22:28:53 +0000 | [diff] [blame] | 1908 | goto errout; |
| 1909 | |
| 1910 | err = inet_netconf_fill_devconf(skb, ifindex, devconf, |
| 1911 | NETLINK_CB(in_skb).portid, |
| 1912 | nlh->nlmsg_seq, RTM_NEWNETCONF, 0, |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 1913 | NETCONFA_ALL); |
Nicolas Dichtel | 9e55111 | 2012-10-25 22:28:53 +0000 | [diff] [blame] | 1914 | if (err < 0) { |
| 1915 | /* -EMSGSIZE implies BUG in inet_netconf_msgsize_devconf() */ |
| 1916 | WARN_ON(err == -EMSGSIZE); |
| 1917 | kfree_skb(skb); |
| 1918 | goto errout; |
| 1919 | } |
| 1920 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); |
| 1921 | errout: |
| 1922 | return err; |
| 1923 | } |
| 1924 | |
Nicolas Dichtel | 7a67420 | 2013-03-05 23:42:06 +0000 | [diff] [blame] | 1925 | static int inet_netconf_dump_devconf(struct sk_buff *skb, |
| 1926 | struct netlink_callback *cb) |
| 1927 | { |
| 1928 | struct net *net = sock_net(skb->sk); |
| 1929 | int h, s_h; |
| 1930 | int idx, s_idx; |
| 1931 | struct net_device *dev; |
| 1932 | struct in_device *in_dev; |
| 1933 | struct hlist_head *head; |
| 1934 | |
| 1935 | s_h = cb->args[0]; |
| 1936 | s_idx = idx = cb->args[1]; |
| 1937 | |
| 1938 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
| 1939 | idx = 0; |
| 1940 | head = &net->dev_index_head[h]; |
| 1941 | rcu_read_lock(); |
Nicolas Dichtel | 0465277 | 2013-03-22 06:28:42 +0000 | [diff] [blame] | 1942 | cb->seq = atomic_read(&net->ipv4.dev_addr_genid) ^ |
| 1943 | net->dev_base_seq; |
Nicolas Dichtel | 7a67420 | 2013-03-05 23:42:06 +0000 | [diff] [blame] | 1944 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
| 1945 | if (idx < s_idx) |
| 1946 | goto cont; |
| 1947 | in_dev = __in_dev_get_rcu(dev); |
| 1948 | if (!in_dev) |
| 1949 | goto cont; |
| 1950 | |
| 1951 | if (inet_netconf_fill_devconf(skb, dev->ifindex, |
| 1952 | &in_dev->cnf, |
| 1953 | NETLINK_CB(cb->skb).portid, |
| 1954 | cb->nlh->nlmsg_seq, |
| 1955 | RTM_NEWNETCONF, |
| 1956 | NLM_F_MULTI, |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 1957 | NETCONFA_ALL) < 0) { |
Nicolas Dichtel | 7a67420 | 2013-03-05 23:42:06 +0000 | [diff] [blame] | 1958 | rcu_read_unlock(); |
| 1959 | goto done; |
| 1960 | } |
Nicolas Dichtel | 0465277 | 2013-03-22 06:28:42 +0000 | [diff] [blame] | 1961 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
Nicolas Dichtel | 7a67420 | 2013-03-05 23:42:06 +0000 | [diff] [blame] | 1962 | cont: |
| 1963 | idx++; |
| 1964 | } |
| 1965 | rcu_read_unlock(); |
| 1966 | } |
| 1967 | if (h == NETDEV_HASHENTRIES) { |
| 1968 | if (inet_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL, |
| 1969 | net->ipv4.devconf_all, |
| 1970 | NETLINK_CB(cb->skb).portid, |
| 1971 | cb->nlh->nlmsg_seq, |
| 1972 | RTM_NEWNETCONF, NLM_F_MULTI, |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 1973 | NETCONFA_ALL) < 0) |
Nicolas Dichtel | 7a67420 | 2013-03-05 23:42:06 +0000 | [diff] [blame] | 1974 | goto done; |
| 1975 | else |
| 1976 | h++; |
| 1977 | } |
| 1978 | if (h == NETDEV_HASHENTRIES + 1) { |
| 1979 | if (inet_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT, |
| 1980 | net->ipv4.devconf_dflt, |
| 1981 | NETLINK_CB(cb->skb).portid, |
| 1982 | cb->nlh->nlmsg_seq, |
| 1983 | RTM_NEWNETCONF, NLM_F_MULTI, |
Zhang Shengju | 136ba62 | 2016-03-10 08:55:50 +0000 | [diff] [blame] | 1984 | NETCONFA_ALL) < 0) |
Nicolas Dichtel | 7a67420 | 2013-03-05 23:42:06 +0000 | [diff] [blame] | 1985 | goto done; |
| 1986 | else |
| 1987 | h++; |
| 1988 | } |
| 1989 | done: |
| 1990 | cb->args[0] = h; |
| 1991 | cb->args[1] = idx; |
| 1992 | |
| 1993 | return skb->len; |
| 1994 | } |
| 1995 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1996 | #ifdef CONFIG_SYSCTL |
| 1997 | |
Pavel Emelyanov | c0ce9fb | 2007-12-16 13:31:14 -0800 | [diff] [blame] | 1998 | static void devinet_copy_dflt_conf(struct net *net, int i) |
Herbert Xu | 31be308 | 2007-06-04 23:35:37 -0700 | [diff] [blame] | 1999 | { |
| 2000 | struct net_device *dev; |
| 2001 | |
Eric Dumazet | c6d14c8 | 2009-11-04 05:43:23 -0800 | [diff] [blame] | 2002 | rcu_read_lock(); |
| 2003 | for_each_netdev_rcu(net, dev) { |
Herbert Xu | 31be308 | 2007-06-04 23:35:37 -0700 | [diff] [blame] | 2004 | struct in_device *in_dev; |
Eric Dumazet | c6d14c8 | 2009-11-04 05:43:23 -0800 | [diff] [blame] | 2005 | |
Herbert Xu | 31be308 | 2007-06-04 23:35:37 -0700 | [diff] [blame] | 2006 | in_dev = __in_dev_get_rcu(dev); |
| 2007 | if (in_dev && !test_bit(i, in_dev->cnf.state)) |
Pavel Emelyanov | 9355bbd | 2007-12-16 13:32:16 -0800 | [diff] [blame] | 2008 | in_dev->cnf.data[i] = net->ipv4.devconf_dflt->data[i]; |
Herbert Xu | 31be308 | 2007-06-04 23:35:37 -0700 | [diff] [blame] | 2009 | } |
Eric Dumazet | c6d14c8 | 2009-11-04 05:43:23 -0800 | [diff] [blame] | 2010 | rcu_read_unlock(); |
Herbert Xu | 31be308 | 2007-06-04 23:35:37 -0700 | [diff] [blame] | 2011 | } |
| 2012 | |
Eric Dumazet | c6d14c8 | 2009-11-04 05:43:23 -0800 | [diff] [blame] | 2013 | /* called with RTNL locked */ |
Pavel Emelyanov | c0ce9fb | 2007-12-16 13:31:14 -0800 | [diff] [blame] | 2014 | static void inet_forward_change(struct net *net) |
Pavel Emelyanov | 68dd299 | 2007-12-05 01:44:58 -0800 | [diff] [blame] | 2015 | { |
| 2016 | struct net_device *dev; |
Pavel Emelyanov | 586f121 | 2007-12-16 13:32:48 -0800 | [diff] [blame] | 2017 | int on = IPV4_DEVCONF_ALL(net, FORWARDING); |
Pavel Emelyanov | 68dd299 | 2007-12-05 01:44:58 -0800 | [diff] [blame] | 2018 | |
Pavel Emelyanov | 586f121 | 2007-12-16 13:32:48 -0800 | [diff] [blame] | 2019 | IPV4_DEVCONF_ALL(net, ACCEPT_REDIRECTS) = !on; |
Pavel Emelyanov | 9355bbd | 2007-12-16 13:32:16 -0800 | [diff] [blame] | 2020 | IPV4_DEVCONF_DFLT(net, FORWARDING) = on; |
Nicolas Dichtel | edc9e74 | 2012-10-25 22:28:52 +0000 | [diff] [blame] | 2021 | inet_netconf_notify_devconf(net, NETCONFA_FORWARDING, |
| 2022 | NETCONFA_IFINDEX_ALL, |
| 2023 | net->ipv4.devconf_all); |
| 2024 | inet_netconf_notify_devconf(net, NETCONFA_FORWARDING, |
| 2025 | NETCONFA_IFINDEX_DEFAULT, |
| 2026 | net->ipv4.devconf_dflt); |
Pavel Emelyanov | 68dd299 | 2007-12-05 01:44:58 -0800 | [diff] [blame] | 2027 | |
Pavel Emelyanov | c0ce9fb | 2007-12-16 13:31:14 -0800 | [diff] [blame] | 2028 | for_each_netdev(net, dev) { |
Pavel Emelyanov | 68dd299 | 2007-12-05 01:44:58 -0800 | [diff] [blame] | 2029 | struct in_device *in_dev; |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 2030 | if (on) |
| 2031 | dev_disable_lro(dev); |
Pavel Emelyanov | 68dd299 | 2007-12-05 01:44:58 -0800 | [diff] [blame] | 2032 | rcu_read_lock(); |
| 2033 | in_dev = __in_dev_get_rcu(dev); |
Nicolas Dichtel | edc9e74 | 2012-10-25 22:28:52 +0000 | [diff] [blame] | 2034 | if (in_dev) { |
Pavel Emelyanov | 68dd299 | 2007-12-05 01:44:58 -0800 | [diff] [blame] | 2035 | IN_DEV_CONF_SET(in_dev, FORWARDING, on); |
Nicolas Dichtel | edc9e74 | 2012-10-25 22:28:52 +0000 | [diff] [blame] | 2036 | inet_netconf_notify_devconf(net, NETCONFA_FORWARDING, |
| 2037 | dev->ifindex, &in_dev->cnf); |
| 2038 | } |
Pavel Emelyanov | 68dd299 | 2007-12-05 01:44:58 -0800 | [diff] [blame] | 2039 | rcu_read_unlock(); |
| 2040 | } |
Pavel Emelyanov | 68dd299 | 2007-12-05 01:44:58 -0800 | [diff] [blame] | 2041 | } |
| 2042 | |
stephen hemminger | f085ff1 | 2013-12-12 13:06:50 -0800 | [diff] [blame] | 2043 | static int devinet_conf_ifindex(struct net *net, struct ipv4_devconf *cnf) |
| 2044 | { |
| 2045 | if (cnf == net->ipv4.devconf_dflt) |
| 2046 | return NETCONFA_IFINDEX_DEFAULT; |
| 2047 | else if (cnf == net->ipv4.devconf_all) |
| 2048 | return NETCONFA_IFINDEX_ALL; |
| 2049 | else { |
| 2050 | struct in_device *idev |
| 2051 | = container_of(cnf, struct in_device, cnf); |
| 2052 | return idev->dev->ifindex; |
| 2053 | } |
| 2054 | } |
| 2055 | |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 2056 | static int devinet_conf_proc(struct ctl_table *ctl, int write, |
Alexey Dobriyan | 8d65af7 | 2009-09-23 15:57:19 -0700 | [diff] [blame] | 2057 | void __user *buffer, |
Herbert Xu | 31be308 | 2007-06-04 23:35:37 -0700 | [diff] [blame] | 2058 | size_t *lenp, loff_t *ppos) |
| 2059 | { |
Peter Pan(潘卫平) | d01ff0a | 2011-12-01 15:47:06 +0000 | [diff] [blame] | 2060 | int old_value = *(int *)ctl->data; |
Alexey Dobriyan | 8d65af7 | 2009-09-23 15:57:19 -0700 | [diff] [blame] | 2061 | int ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
Peter Pan(潘卫平) | d01ff0a | 2011-12-01 15:47:06 +0000 | [diff] [blame] | 2062 | int new_value = *(int *)ctl->data; |
Herbert Xu | 31be308 | 2007-06-04 23:35:37 -0700 | [diff] [blame] | 2063 | |
| 2064 | if (write) { |
| 2065 | struct ipv4_devconf *cnf = ctl->extra1; |
Pavel Emelyanov | c0ce9fb | 2007-12-16 13:31:14 -0800 | [diff] [blame] | 2066 | struct net *net = ctl->extra2; |
Herbert Xu | 31be308 | 2007-06-04 23:35:37 -0700 | [diff] [blame] | 2067 | int i = (int *)ctl->data - cnf->data; |
stephen hemminger | f085ff1 | 2013-12-12 13:06:50 -0800 | [diff] [blame] | 2068 | int ifindex; |
Herbert Xu | 31be308 | 2007-06-04 23:35:37 -0700 | [diff] [blame] | 2069 | |
| 2070 | set_bit(i, cnf->state); |
| 2071 | |
Pavel Emelyanov | 9355bbd | 2007-12-16 13:32:16 -0800 | [diff] [blame] | 2072 | if (cnf == net->ipv4.devconf_dflt) |
Pavel Emelyanov | c0ce9fb | 2007-12-16 13:31:14 -0800 | [diff] [blame] | 2073 | devinet_copy_dflt_conf(net, i); |
Thomas Graf | d0daebc3 | 2012-06-12 00:44:01 +0000 | [diff] [blame] | 2074 | if (i == IPV4_DEVCONF_ACCEPT_LOCAL - 1 || |
| 2075 | i == IPV4_DEVCONF_ROUTE_LOCALNET - 1) |
Peter Pan(潘卫平) | d01ff0a | 2011-12-01 15:47:06 +0000 | [diff] [blame] | 2076 | if ((new_value == 0) && (old_value != 0)) |
Nicolas Dichtel | 4ccfe6d | 2012-09-07 00:45:29 +0000 | [diff] [blame] | 2077 | rt_cache_flush(net); |
stephen hemminger | f085ff1 | 2013-12-12 13:06:50 -0800 | [diff] [blame] | 2078 | |
Nicolas Dichtel | cc535df | 2012-10-29 04:53:27 +0000 | [diff] [blame] | 2079 | if (i == IPV4_DEVCONF_RP_FILTER - 1 && |
| 2080 | new_value != old_value) { |
stephen hemminger | f085ff1 | 2013-12-12 13:06:50 -0800 | [diff] [blame] | 2081 | ifindex = devinet_conf_ifindex(net, cnf); |
Nicolas Dichtel | cc535df | 2012-10-29 04:53:27 +0000 | [diff] [blame] | 2082 | inet_netconf_notify_devconf(net, NETCONFA_RP_FILTER, |
| 2083 | ifindex, cnf); |
| 2084 | } |
stephen hemminger | f085ff1 | 2013-12-12 13:06:50 -0800 | [diff] [blame] | 2085 | if (i == IPV4_DEVCONF_PROXY_ARP - 1 && |
| 2086 | new_value != old_value) { |
| 2087 | ifindex = devinet_conf_ifindex(net, cnf); |
stephen hemminger | 09aea5d | 2013-12-17 22:35:52 -0800 | [diff] [blame] | 2088 | inet_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, |
stephen hemminger | f085ff1 | 2013-12-12 13:06:50 -0800 | [diff] [blame] | 2089 | ifindex, cnf); |
| 2090 | } |
Andy Gospodarek | 974d7af | 2015-07-07 13:56:57 -0400 | [diff] [blame] | 2091 | if (i == IPV4_DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN - 1 && |
| 2092 | new_value != old_value) { |
| 2093 | ifindex = devinet_conf_ifindex(net, cnf); |
| 2094 | inet_netconf_notify_devconf(net, NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, |
| 2095 | ifindex, cnf); |
| 2096 | } |
Herbert Xu | 31be308 | 2007-06-04 23:35:37 -0700 | [diff] [blame] | 2097 | } |
| 2098 | |
| 2099 | return ret; |
| 2100 | } |
| 2101 | |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 2102 | static int devinet_sysctl_forward(struct ctl_table *ctl, int write, |
Alexey Dobriyan | 8d65af7 | 2009-09-23 15:57:19 -0700 | [diff] [blame] | 2103 | void __user *buffer, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2104 | size_t *lenp, loff_t *ppos) |
| 2105 | { |
| 2106 | int *valp = ctl->data; |
| 2107 | int val = *valp; |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 2108 | loff_t pos = *ppos; |
Alexey Dobriyan | 8d65af7 | 2009-09-23 15:57:19 -0700 | [diff] [blame] | 2109 | int ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2110 | |
| 2111 | if (write && *valp != val) { |
Pavel Emelyanov | c0ce9fb | 2007-12-16 13:31:14 -0800 | [diff] [blame] | 2112 | struct net *net = ctl->extra2; |
| 2113 | |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 2114 | if (valp != &IPV4_DEVCONF_DFLT(net, FORWARDING)) { |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 2115 | if (!rtnl_trylock()) { |
| 2116 | /* Restore the original values before restarting */ |
| 2117 | *valp = val; |
| 2118 | *ppos = pos; |
Eric W. Biederman | 9b8adb5 | 2009-05-13 16:59:21 +0000 | [diff] [blame] | 2119 | return restart_syscall(); |
Eric W. Biederman | 88af182 | 2010-02-19 13:22:59 +0000 | [diff] [blame] | 2120 | } |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 2121 | if (valp == &IPV4_DEVCONF_ALL(net, FORWARDING)) { |
| 2122 | inet_forward_change(net); |
Nicolas Dichtel | edc9e74 | 2012-10-25 22:28:52 +0000 | [diff] [blame] | 2123 | } else { |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 2124 | struct ipv4_devconf *cnf = ctl->extra1; |
| 2125 | struct in_device *idev = |
| 2126 | container_of(cnf, struct in_device, cnf); |
Nicolas Dichtel | edc9e74 | 2012-10-25 22:28:52 +0000 | [diff] [blame] | 2127 | if (*valp) |
| 2128 | dev_disable_lro(idev->dev); |
| 2129 | inet_netconf_notify_devconf(net, |
| 2130 | NETCONFA_FORWARDING, |
| 2131 | idev->dev->ifindex, |
| 2132 | cnf); |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 2133 | } |
| 2134 | rtnl_unlock(); |
Nicolas Dichtel | 4ccfe6d | 2012-09-07 00:45:29 +0000 | [diff] [blame] | 2135 | rt_cache_flush(net); |
Nicolas Dichtel | edc9e74 | 2012-10-25 22:28:52 +0000 | [diff] [blame] | 2136 | } else |
| 2137 | inet_netconf_notify_devconf(net, NETCONFA_FORWARDING, |
| 2138 | NETCONFA_IFINDEX_DEFAULT, |
| 2139 | net->ipv4.devconf_dflt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2140 | } |
| 2141 | |
| 2142 | return ret; |
| 2143 | } |
| 2144 | |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 2145 | static int ipv4_doint_and_flush(struct ctl_table *ctl, int write, |
David S. Miller | 323e126 | 2010-12-12 21:55:08 -0800 | [diff] [blame] | 2146 | void __user *buffer, |
| 2147 | size_t *lenp, loff_t *ppos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2148 | { |
| 2149 | int *valp = ctl->data; |
| 2150 | int val = *valp; |
Alexey Dobriyan | 8d65af7 | 2009-09-23 15:57:19 -0700 | [diff] [blame] | 2151 | int ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
Denis V. Lunev | 76e6ebf | 2008-07-05 19:00:44 -0700 | [diff] [blame] | 2152 | struct net *net = ctl->extra2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2153 | |
| 2154 | if (write && *valp != val) |
Nicolas Dichtel | 4ccfe6d | 2012-09-07 00:45:29 +0000 | [diff] [blame] | 2155 | rt_cache_flush(net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2156 | |
| 2157 | return ret; |
| 2158 | } |
| 2159 | |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 2160 | #define DEVINET_SYSCTL_ENTRY(attr, name, mval, proc) \ |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 2161 | { \ |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 2162 | .procname = name, \ |
| 2163 | .data = ipv4_devconf.data + \ |
Eric W. Biederman | 0229168 | 2010-02-14 03:25:51 +0000 | [diff] [blame] | 2164 | IPV4_DEVCONF_ ## attr - 1, \ |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 2165 | .maxlen = sizeof(int), \ |
| 2166 | .mode = mval, \ |
| 2167 | .proc_handler = proc, \ |
Herbert Xu | 31be308 | 2007-06-04 23:35:37 -0700 | [diff] [blame] | 2168 | .extra1 = &ipv4_devconf, \ |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 2169 | } |
| 2170 | |
| 2171 | #define DEVINET_SYSCTL_RW_ENTRY(attr, name) \ |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 2172 | DEVINET_SYSCTL_ENTRY(attr, name, 0644, devinet_conf_proc) |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 2173 | |
| 2174 | #define DEVINET_SYSCTL_RO_ENTRY(attr, name) \ |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 2175 | DEVINET_SYSCTL_ENTRY(attr, name, 0444, devinet_conf_proc) |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 2176 | |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 2177 | #define DEVINET_SYSCTL_COMPLEX_ENTRY(attr, name, proc) \ |
| 2178 | DEVINET_SYSCTL_ENTRY(attr, name, 0644, proc) |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 2179 | |
| 2180 | #define DEVINET_SYSCTL_FLUSHING_ENTRY(attr, name) \ |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 2181 | DEVINET_SYSCTL_COMPLEX_ENTRY(attr, name, ipv4_doint_and_flush) |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 2182 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2183 | static struct devinet_sysctl_table { |
| 2184 | struct ctl_table_header *sysctl_header; |
Eric W. Biederman | 0229168 | 2010-02-14 03:25:51 +0000 | [diff] [blame] | 2185 | struct ctl_table devinet_vars[__IPV4_DEVCONF_MAX]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2186 | } devinet_sysctl = { |
| 2187 | .devinet_vars = { |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 2188 | DEVINET_SYSCTL_COMPLEX_ENTRY(FORWARDING, "forwarding", |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 2189 | devinet_sysctl_forward), |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 2190 | DEVINET_SYSCTL_RO_ENTRY(MC_FORWARDING, "mc_forwarding"), |
| 2191 | |
| 2192 | DEVINET_SYSCTL_RW_ENTRY(ACCEPT_REDIRECTS, "accept_redirects"), |
| 2193 | DEVINET_SYSCTL_RW_ENTRY(SECURE_REDIRECTS, "secure_redirects"), |
| 2194 | DEVINET_SYSCTL_RW_ENTRY(SHARED_MEDIA, "shared_media"), |
| 2195 | DEVINET_SYSCTL_RW_ENTRY(RP_FILTER, "rp_filter"), |
| 2196 | DEVINET_SYSCTL_RW_ENTRY(SEND_REDIRECTS, "send_redirects"), |
| 2197 | DEVINET_SYSCTL_RW_ENTRY(ACCEPT_SOURCE_ROUTE, |
| 2198 | "accept_source_route"), |
Patrick McHardy | 8153a10 | 2009-12-03 01:25:58 +0000 | [diff] [blame] | 2199 | DEVINET_SYSCTL_RW_ENTRY(ACCEPT_LOCAL, "accept_local"), |
Jamal Hadi Salim | 28f6aee | 2009-12-25 17:30:22 -0800 | [diff] [blame] | 2200 | DEVINET_SYSCTL_RW_ENTRY(SRC_VMARK, "src_valid_mark"), |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 2201 | DEVINET_SYSCTL_RW_ENTRY(PROXY_ARP, "proxy_arp"), |
| 2202 | DEVINET_SYSCTL_RW_ENTRY(MEDIUM_ID, "medium_id"), |
| 2203 | DEVINET_SYSCTL_RW_ENTRY(BOOTP_RELAY, "bootp_relay"), |
| 2204 | DEVINET_SYSCTL_RW_ENTRY(LOG_MARTIANS, "log_martians"), |
| 2205 | DEVINET_SYSCTL_RW_ENTRY(TAG, "tag"), |
| 2206 | DEVINET_SYSCTL_RW_ENTRY(ARPFILTER, "arp_filter"), |
| 2207 | DEVINET_SYSCTL_RW_ENTRY(ARP_ANNOUNCE, "arp_announce"), |
| 2208 | DEVINET_SYSCTL_RW_ENTRY(ARP_IGNORE, "arp_ignore"), |
| 2209 | DEVINET_SYSCTL_RW_ENTRY(ARP_ACCEPT, "arp_accept"), |
Stephen Hemminger | eefef1c | 2009-02-01 01:04:33 -0800 | [diff] [blame] | 2210 | DEVINET_SYSCTL_RW_ENTRY(ARP_NOTIFY, "arp_notify"), |
Jesper Dangaard Brouer | 6532414 | 2010-01-05 05:50:47 +0000 | [diff] [blame] | 2211 | DEVINET_SYSCTL_RW_ENTRY(PROXY_ARP_PVLAN, "proxy_arp_pvlan"), |
William Manley | 5c6fe01 | 2013-08-06 19:03:14 +0100 | [diff] [blame] | 2212 | DEVINET_SYSCTL_RW_ENTRY(FORCE_IGMP_VERSION, |
| 2213 | "force_igmp_version"), |
William Manley | 2690048 | 2013-08-06 19:03:15 +0100 | [diff] [blame] | 2214 | DEVINET_SYSCTL_RW_ENTRY(IGMPV2_UNSOLICITED_REPORT_INTERVAL, |
| 2215 | "igmpv2_unsolicited_report_interval"), |
| 2216 | DEVINET_SYSCTL_RW_ENTRY(IGMPV3_UNSOLICITED_REPORT_INTERVAL, |
| 2217 | "igmpv3_unsolicited_report_interval"), |
Andy Gospodarek | 0eeb075 | 2015-06-23 13:45:37 -0400 | [diff] [blame] | 2218 | DEVINET_SYSCTL_RW_ENTRY(IGNORE_ROUTES_WITH_LINKDOWN, |
| 2219 | "ignore_routes_with_linkdown"), |
Johannes Berg | 97daf33 | 2016-02-04 13:31:18 +0100 | [diff] [blame] | 2220 | DEVINET_SYSCTL_RW_ENTRY(DROP_GRATUITOUS_ARP, |
| 2221 | "drop_gratuitous_arp"), |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 2222 | |
| 2223 | DEVINET_SYSCTL_FLUSHING_ENTRY(NOXFRM, "disable_xfrm"), |
| 2224 | DEVINET_SYSCTL_FLUSHING_ENTRY(NOPOLICY, "disable_policy"), |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 2225 | DEVINET_SYSCTL_FLUSHING_ENTRY(PROMOTE_SECONDARIES, |
| 2226 | "promote_secondaries"), |
Thomas Graf | d0daebc3 | 2012-06-12 00:44:01 +0000 | [diff] [blame] | 2227 | DEVINET_SYSCTL_FLUSHING_ENTRY(ROUTE_LOCALNET, |
| 2228 | "route_localnet"), |
Johannes Berg | 12b74df | 2016-02-04 13:31:17 +0100 | [diff] [blame] | 2229 | DEVINET_SYSCTL_FLUSHING_ENTRY(DROP_UNICAST_IN_L2_MULTICAST, |
| 2230 | "drop_unicast_in_l2_multicast"), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2231 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2232 | }; |
| 2233 | |
Pavel Emelyanov | ea40b32 | 2007-12-16 13:30:07 -0800 | [diff] [blame] | 2234 | static int __devinet_sysctl_register(struct net *net, char *dev_name, |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 2235 | struct ipv4_devconf *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2236 | { |
| 2237 | int i; |
Pavel Emelyanov | 9fa8964 | 2007-12-02 00:17:46 +1100 | [diff] [blame] | 2238 | struct devinet_sysctl_table *t; |
Eric W. Biederman | 8607ddb | 2012-04-19 13:42:09 +0000 | [diff] [blame] | 2239 | char path[sizeof("net/ipv4/conf/") + IFNAMSIZ]; |
Pavel Emelyanov | bfada69 | 2007-12-02 00:57:08 +1100 | [diff] [blame] | 2240 | |
Pavel Emelyanov | 9fa8964 | 2007-12-02 00:17:46 +1100 | [diff] [blame] | 2241 | t = kmemdup(&devinet_sysctl, sizeof(*t), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2242 | if (!t) |
Pavel Emelyanov | 9fa8964 | 2007-12-02 00:17:46 +1100 | [diff] [blame] | 2243 | goto out; |
| 2244 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2245 | for (i = 0; i < ARRAY_SIZE(t->devinet_vars) - 1; i++) { |
| 2246 | t->devinet_vars[i].data += (char *)p - (char *)&ipv4_devconf; |
Herbert Xu | 31be308 | 2007-06-04 23:35:37 -0700 | [diff] [blame] | 2247 | t->devinet_vars[i].extra1 = p; |
Pavel Emelyanov | c0ce9fb | 2007-12-16 13:31:14 -0800 | [diff] [blame] | 2248 | t->devinet_vars[i].extra2 = net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2249 | } |
| 2250 | |
Eric W. Biederman | 8607ddb | 2012-04-19 13:42:09 +0000 | [diff] [blame] | 2251 | snprintf(path, sizeof(path), "net/ipv4/conf/%s", dev_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2252 | |
Eric W. Biederman | 8607ddb | 2012-04-19 13:42:09 +0000 | [diff] [blame] | 2253 | t->sysctl_header = register_net_sysctl(net, path, t->devinet_vars); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2254 | if (!t->sysctl_header) |
Eric W. Biederman | 8607ddb | 2012-04-19 13:42:09 +0000 | [diff] [blame] | 2255 | goto free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2256 | |
| 2257 | p->sysctl = t; |
Pavel Emelyanov | ea40b32 | 2007-12-16 13:30:07 -0800 | [diff] [blame] | 2258 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2259 | |
Pavel Emelyanov | 9fa8964 | 2007-12-02 00:17:46 +1100 | [diff] [blame] | 2260 | free: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2261 | kfree(t); |
Pavel Emelyanov | 9fa8964 | 2007-12-02 00:17:46 +1100 | [diff] [blame] | 2262 | out: |
Pavel Emelyanov | ea40b32 | 2007-12-16 13:30:07 -0800 | [diff] [blame] | 2263 | return -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2264 | } |
| 2265 | |
Pavel Emelyanov | 51602b2 | 2007-12-11 02:17:40 -0800 | [diff] [blame] | 2266 | static void __devinet_sysctl_unregister(struct ipv4_devconf *cnf) |
| 2267 | { |
| 2268 | struct devinet_sysctl_table *t = cnf->sysctl; |
| 2269 | |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 2270 | if (!t) |
Pavel Emelyanov | 51602b2 | 2007-12-11 02:17:40 -0800 | [diff] [blame] | 2271 | return; |
| 2272 | |
| 2273 | cnf->sysctl = NULL; |
Lucian Adrian Grijincu | ff53881 | 2011-05-01 01:44:01 +0000 | [diff] [blame] | 2274 | unregister_net_sysctl_table(t->sysctl_header); |
Pavel Emelyanov | 51602b2 | 2007-12-11 02:17:40 -0800 | [diff] [blame] | 2275 | kfree(t); |
| 2276 | } |
| 2277 | |
WANG Cong | 20e61da | 2014-07-25 15:25:08 -0700 | [diff] [blame] | 2278 | static int devinet_sysctl_register(struct in_device *idev) |
Pavel Emelyanov | 66f27a5 | 2007-12-02 00:55:54 +1100 | [diff] [blame] | 2279 | { |
WANG Cong | 20e61da | 2014-07-25 15:25:08 -0700 | [diff] [blame] | 2280 | int err; |
| 2281 | |
| 2282 | if (!sysctl_dev_name_is_allowed(idev->dev->name)) |
| 2283 | return -EINVAL; |
| 2284 | |
| 2285 | err = neigh_sysctl_register(idev->dev, idev->arp_parms, NULL); |
| 2286 | if (err) |
| 2287 | return err; |
| 2288 | err = __devinet_sysctl_register(dev_net(idev->dev), idev->dev->name, |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 2289 | &idev->cnf); |
WANG Cong | 20e61da | 2014-07-25 15:25:08 -0700 | [diff] [blame] | 2290 | if (err) |
| 2291 | neigh_sysctl_unregister(idev->arp_parms); |
| 2292 | return err; |
Pavel Emelyanov | 66f27a5 | 2007-12-02 00:55:54 +1100 | [diff] [blame] | 2293 | } |
| 2294 | |
Pavel Emelyanov | 51602b2 | 2007-12-11 02:17:40 -0800 | [diff] [blame] | 2295 | static void devinet_sysctl_unregister(struct in_device *idev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2296 | { |
Pavel Emelyanov | 51602b2 | 2007-12-11 02:17:40 -0800 | [diff] [blame] | 2297 | __devinet_sysctl_unregister(&idev->cnf); |
| 2298 | neigh_sysctl_unregister(idev->arp_parms); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2299 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2300 | |
Pavel Emelyanov | 68dd299 | 2007-12-05 01:44:58 -0800 | [diff] [blame] | 2301 | static struct ctl_table ctl_forward_entry[] = { |
| 2302 | { |
Pavel Emelyanov | 68dd299 | 2007-12-05 01:44:58 -0800 | [diff] [blame] | 2303 | .procname = "ip_forward", |
| 2304 | .data = &ipv4_devconf.data[ |
Eric W. Biederman | 0229168 | 2010-02-14 03:25:51 +0000 | [diff] [blame] | 2305 | IPV4_DEVCONF_FORWARDING - 1], |
Pavel Emelyanov | 68dd299 | 2007-12-05 01:44:58 -0800 | [diff] [blame] | 2306 | .maxlen = sizeof(int), |
| 2307 | .mode = 0644, |
| 2308 | .proc_handler = devinet_sysctl_forward, |
Pavel Emelyanov | 68dd299 | 2007-12-05 01:44:58 -0800 | [diff] [blame] | 2309 | .extra1 = &ipv4_devconf, |
Pavel Emelyanov | c0ce9fb | 2007-12-16 13:31:14 -0800 | [diff] [blame] | 2310 | .extra2 = &init_net, |
Pavel Emelyanov | 68dd299 | 2007-12-05 01:44:58 -0800 | [diff] [blame] | 2311 | }, |
| 2312 | { }, |
| 2313 | }; |
Eric Dumazet | 2a75de0 | 2008-01-05 23:08:49 -0800 | [diff] [blame] | 2314 | #endif |
Pavel Emelyanov | 68dd299 | 2007-12-05 01:44:58 -0800 | [diff] [blame] | 2315 | |
Pavel Emelyanov | 752d14d | 2007-12-16 13:31:47 -0800 | [diff] [blame] | 2316 | static __net_init int devinet_init_net(struct net *net) |
| 2317 | { |
| 2318 | int err; |
Pavel Emelyanov | 752d14d | 2007-12-16 13:31:47 -0800 | [diff] [blame] | 2319 | struct ipv4_devconf *all, *dflt; |
Eric Dumazet | 2a75de0 | 2008-01-05 23:08:49 -0800 | [diff] [blame] | 2320 | #ifdef CONFIG_SYSCTL |
| 2321 | struct ctl_table *tbl = ctl_forward_entry; |
Pavel Emelyanov | 752d14d | 2007-12-16 13:31:47 -0800 | [diff] [blame] | 2322 | struct ctl_table_header *forw_hdr; |
Eric Dumazet | 2a75de0 | 2008-01-05 23:08:49 -0800 | [diff] [blame] | 2323 | #endif |
Pavel Emelyanov | 752d14d | 2007-12-16 13:31:47 -0800 | [diff] [blame] | 2324 | |
| 2325 | err = -ENOMEM; |
| 2326 | all = &ipv4_devconf; |
| 2327 | dflt = &ipv4_devconf_dflt; |
Pavel Emelyanov | 752d14d | 2007-12-16 13:31:47 -0800 | [diff] [blame] | 2328 | |
Octavian Purdila | 09ad9bc | 2009-11-25 15:14:13 -0800 | [diff] [blame] | 2329 | if (!net_eq(net, &init_net)) { |
Pavel Emelyanov | 752d14d | 2007-12-16 13:31:47 -0800 | [diff] [blame] | 2330 | all = kmemdup(all, sizeof(ipv4_devconf), GFP_KERNEL); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 2331 | if (!all) |
Pavel Emelyanov | 752d14d | 2007-12-16 13:31:47 -0800 | [diff] [blame] | 2332 | goto err_alloc_all; |
| 2333 | |
| 2334 | dflt = kmemdup(dflt, sizeof(ipv4_devconf_dflt), GFP_KERNEL); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 2335 | if (!dflt) |
Pavel Emelyanov | 752d14d | 2007-12-16 13:31:47 -0800 | [diff] [blame] | 2336 | goto err_alloc_dflt; |
| 2337 | |
Eric Dumazet | 2a75de0 | 2008-01-05 23:08:49 -0800 | [diff] [blame] | 2338 | #ifdef CONFIG_SYSCTL |
Pavel Emelyanov | 752d14d | 2007-12-16 13:31:47 -0800 | [diff] [blame] | 2339 | tbl = kmemdup(tbl, sizeof(ctl_forward_entry), GFP_KERNEL); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 2340 | if (!tbl) |
Pavel Emelyanov | 752d14d | 2007-12-16 13:31:47 -0800 | [diff] [blame] | 2341 | goto err_alloc_ctl; |
| 2342 | |
Eric W. Biederman | 0229168 | 2010-02-14 03:25:51 +0000 | [diff] [blame] | 2343 | tbl[0].data = &all->data[IPV4_DEVCONF_FORWARDING - 1]; |
Pavel Emelyanov | 752d14d | 2007-12-16 13:31:47 -0800 | [diff] [blame] | 2344 | tbl[0].extra1 = all; |
| 2345 | tbl[0].extra2 = net; |
Eric Dumazet | 2a75de0 | 2008-01-05 23:08:49 -0800 | [diff] [blame] | 2346 | #endif |
Pavel Emelyanov | 752d14d | 2007-12-16 13:31:47 -0800 | [diff] [blame] | 2347 | } |
| 2348 | |
| 2349 | #ifdef CONFIG_SYSCTL |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 2350 | err = __devinet_sysctl_register(net, "all", all); |
Pavel Emelyanov | 752d14d | 2007-12-16 13:31:47 -0800 | [diff] [blame] | 2351 | if (err < 0) |
| 2352 | goto err_reg_all; |
| 2353 | |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 2354 | err = __devinet_sysctl_register(net, "default", dflt); |
Pavel Emelyanov | 752d14d | 2007-12-16 13:31:47 -0800 | [diff] [blame] | 2355 | if (err < 0) |
| 2356 | goto err_reg_dflt; |
| 2357 | |
| 2358 | err = -ENOMEM; |
Eric W. Biederman | 8607ddb | 2012-04-19 13:42:09 +0000 | [diff] [blame] | 2359 | forw_hdr = register_net_sysctl(net, "net/ipv4", tbl); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 2360 | if (!forw_hdr) |
Pavel Emelyanov | 752d14d | 2007-12-16 13:31:47 -0800 | [diff] [blame] | 2361 | goto err_reg_ctl; |
Eric Dumazet | 2a75de0 | 2008-01-05 23:08:49 -0800 | [diff] [blame] | 2362 | net->ipv4.forw_hdr = forw_hdr; |
Pavel Emelyanov | 752d14d | 2007-12-16 13:31:47 -0800 | [diff] [blame] | 2363 | #endif |
| 2364 | |
Pavel Emelyanov | 752d14d | 2007-12-16 13:31:47 -0800 | [diff] [blame] | 2365 | net->ipv4.devconf_all = all; |
| 2366 | net->ipv4.devconf_dflt = dflt; |
| 2367 | return 0; |
| 2368 | |
| 2369 | #ifdef CONFIG_SYSCTL |
| 2370 | err_reg_ctl: |
| 2371 | __devinet_sysctl_unregister(dflt); |
| 2372 | err_reg_dflt: |
| 2373 | __devinet_sysctl_unregister(all); |
| 2374 | err_reg_all: |
| 2375 | if (tbl != ctl_forward_entry) |
| 2376 | kfree(tbl); |
Pavel Emelyanov | 752d14d | 2007-12-16 13:31:47 -0800 | [diff] [blame] | 2377 | err_alloc_ctl: |
Eric Dumazet | 2a75de0 | 2008-01-05 23:08:49 -0800 | [diff] [blame] | 2378 | #endif |
Pavel Emelyanov | 752d14d | 2007-12-16 13:31:47 -0800 | [diff] [blame] | 2379 | if (dflt != &ipv4_devconf_dflt) |
| 2380 | kfree(dflt); |
| 2381 | err_alloc_dflt: |
| 2382 | if (all != &ipv4_devconf) |
| 2383 | kfree(all); |
| 2384 | err_alloc_all: |
| 2385 | return err; |
| 2386 | } |
| 2387 | |
| 2388 | static __net_exit void devinet_exit_net(struct net *net) |
| 2389 | { |
Eric Dumazet | 2a75de0 | 2008-01-05 23:08:49 -0800 | [diff] [blame] | 2390 | #ifdef CONFIG_SYSCTL |
Pavel Emelyanov | 752d14d | 2007-12-16 13:31:47 -0800 | [diff] [blame] | 2391 | struct ctl_table *tbl; |
| 2392 | |
| 2393 | tbl = net->ipv4.forw_hdr->ctl_table_arg; |
Pavel Emelyanov | 752d14d | 2007-12-16 13:31:47 -0800 | [diff] [blame] | 2394 | unregister_net_sysctl_table(net->ipv4.forw_hdr); |
| 2395 | __devinet_sysctl_unregister(net->ipv4.devconf_dflt); |
| 2396 | __devinet_sysctl_unregister(net->ipv4.devconf_all); |
Pavel Emelyanov | 752d14d | 2007-12-16 13:31:47 -0800 | [diff] [blame] | 2397 | kfree(tbl); |
Eric Dumazet | 2a75de0 | 2008-01-05 23:08:49 -0800 | [diff] [blame] | 2398 | #endif |
Pavel Emelyanov | 752d14d | 2007-12-16 13:31:47 -0800 | [diff] [blame] | 2399 | kfree(net->ipv4.devconf_dflt); |
| 2400 | kfree(net->ipv4.devconf_all); |
| 2401 | } |
| 2402 | |
| 2403 | static __net_initdata struct pernet_operations devinet_ops = { |
| 2404 | .init = devinet_init_net, |
| 2405 | .exit = devinet_exit_net, |
| 2406 | }; |
| 2407 | |
Daniel Borkmann | 207895f | 2015-01-29 12:15:03 +0100 | [diff] [blame] | 2408 | static struct rtnl_af_ops inet_af_ops __read_mostly = { |
Thomas Graf | 9f0f727 | 2010-11-16 04:32:48 +0000 | [diff] [blame] | 2409 | .family = AF_INET, |
| 2410 | .fill_link_af = inet_fill_link_af, |
| 2411 | .get_link_af_size = inet_get_link_af_size, |
Thomas Graf | cf7afbf | 2010-11-22 01:31:54 +0000 | [diff] [blame] | 2412 | .validate_link_af = inet_validate_link_af, |
| 2413 | .set_link_af = inet_set_link_af, |
Thomas Graf | 9f0f727 | 2010-11-16 04:32:48 +0000 | [diff] [blame] | 2414 | }; |
| 2415 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2416 | void __init devinet_init(void) |
| 2417 | { |
David S. Miller | fd23c3b | 2011-02-18 12:42:28 -0800 | [diff] [blame] | 2418 | int i; |
| 2419 | |
| 2420 | for (i = 0; i < IN4_ADDR_HSIZE; i++) |
| 2421 | INIT_HLIST_HEAD(&inet_addr_lst[i]); |
| 2422 | |
Pavel Emelyanov | 752d14d | 2007-12-16 13:31:47 -0800 | [diff] [blame] | 2423 | register_pernet_subsys(&devinet_ops); |
| 2424 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2425 | register_gifconf(PF_INET, inet_gifconf); |
| 2426 | register_netdevice_notifier(&ip_netdev_notifier); |
Thomas Graf | 63f3444 | 2007-03-22 11:55:17 -0700 | [diff] [blame] | 2427 | |
viresh kumar | 906e073 | 2014-01-22 12:23:32 +0530 | [diff] [blame] | 2428 | queue_delayed_work(system_power_efficient_wq, &check_lifetime_work, 0); |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 2429 | |
Thomas Graf | 9f0f727 | 2010-11-16 04:32:48 +0000 | [diff] [blame] | 2430 | rtnl_af_register(&inet_af_ops); |
| 2431 | |
Greg Rose | c7ac867 | 2011-06-10 01:27:09 +0000 | [diff] [blame] | 2432 | rtnl_register(PF_INET, RTM_NEWADDR, inet_rtm_newaddr, NULL, NULL); |
| 2433 | rtnl_register(PF_INET, RTM_DELADDR, inet_rtm_deladdr, NULL, NULL); |
| 2434 | rtnl_register(PF_INET, RTM_GETADDR, NULL, inet_dump_ifaddr, NULL); |
Nicolas Dichtel | 9e55111 | 2012-10-25 22:28:53 +0000 | [diff] [blame] | 2435 | rtnl_register(PF_INET, RTM_GETNETCONF, inet_netconf_get_devconf, |
Nicolas Dichtel | 7a67420 | 2013-03-05 23:42:06 +0000 | [diff] [blame] | 2436 | inet_netconf_dump_devconf, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2437 | } |