Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 2 | * Linux NET3: IP/IP protocol decoder. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * Authors: |
| 5 | * Sam Lantinga (slouken@cs.ucdavis.edu) 02/01/95 |
| 6 | * |
| 7 | * Fixes: |
| 8 | * Alan Cox : Merged and made usable non modular (its so tiny its silly as |
| 9 | * a module taking up 2 pages). |
| 10 | * Alan Cox : Fixed bug with 1.3.18 and IPIP not working (now needs to set skb->h.iph) |
| 11 | * to keep ip_forward happy. |
| 12 | * Alan Cox : More fixes for 1.3.21, and firewall fix. Maybe this will work soon 8). |
| 13 | * Kai Schulte : Fixed #defines for IP_FIREWALL->FIREWALL |
| 14 | * David Woodhouse : Perform some basic ICMP handling. |
| 15 | * IPIP Routing without decapsulation. |
| 16 | * Carlos Picoto : GRE over IP support |
| 17 | * Alexey Kuznetsov: Reworked. Really, now it is truncated version of ipv4/ip_gre.c. |
| 18 | * I do not want to merge them together. |
| 19 | * |
| 20 | * This program is free software; you can redistribute it and/or |
| 21 | * modify it under the terms of the GNU General Public License |
| 22 | * as published by the Free Software Foundation; either version |
| 23 | * 2 of the License, or (at your option) any later version. |
| 24 | * |
| 25 | */ |
| 26 | |
| 27 | /* tunnel.c: an IP tunnel driver |
| 28 | |
| 29 | The purpose of this driver is to provide an IP tunnel through |
| 30 | which you can tunnel network traffic transparently across subnets. |
| 31 | |
| 32 | This was written by looking at Nick Holloway's dummy driver |
| 33 | Thanks for the great code! |
| 34 | |
| 35 | -Sam Lantinga (slouken@cs.ucdavis.edu) 02/01/95 |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 36 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | Minor tweaks: |
| 38 | Cleaned up the code a little and added some pre-1.3.0 tweaks. |
| 39 | dev->hard_header/hard_header_len changed to use no headers. |
| 40 | Comments/bracketing tweaked. |
| 41 | Made the tunnels use dev->name not tunnel: when error reporting. |
| 42 | Added tx_dropped stat |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 43 | |
Alan Cox | 113aa83 | 2008-10-13 19:01:08 -0700 | [diff] [blame] | 44 | -Alan Cox (alan@lxorguk.ukuu.org.uk) 21 March 95 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
| 46 | Reworked: |
| 47 | Changed to tunnel to destination gateway in addition to the |
| 48 | tunnel's pointopoint address |
| 49 | Almost completely rewritten |
| 50 | Note: There is currently no firewall or ICMP handling done. |
| 51 | |
| 52 | -Sam Lantinga (slouken@cs.ucdavis.edu) 02/13/96 |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 53 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | */ |
| 55 | |
| 56 | /* Things I wish I had known when writing the tunnel driver: |
| 57 | |
| 58 | When the tunnel_xmit() function is called, the skb contains the |
| 59 | packet to be sent (plus a great deal of extra info), and dev |
| 60 | contains the tunnel device that _we_ are. |
| 61 | |
| 62 | When we are passed a packet, we are expected to fill in the |
| 63 | source address with our source IP address. |
| 64 | |
| 65 | What is the proper way to allocate, copy and free a buffer? |
| 66 | After you allocate it, it is a "0 length" chunk of memory |
| 67 | starting at zero. If you want to add headers to the buffer |
| 68 | later, you'll have to call "skb_reserve(skb, amount)" with |
| 69 | the amount of memory you want reserved. Then, you call |
| 70 | "skb_put(skb, amount)" with the amount of space you want in |
| 71 | the buffer. skb_put() returns a pointer to the top (#0) of |
| 72 | that buffer. skb->len is set to the amount of space you have |
| 73 | "allocated" with skb_put(). You can then write up to skb->len |
| 74 | bytes to that buffer. If you need more, you can call skb_put() |
| 75 | again with the additional amount of space you need. You can |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 76 | find out how much more space you can allocate by calling |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | "skb_tailroom(skb)". |
| 78 | Now, to add header space, call "skb_push(skb, header_len)". |
| 79 | This creates space at the beginning of the buffer and returns |
| 80 | a pointer to this new space. If later you need to strip a |
| 81 | header from a buffer, call "skb_pull(skb, header_len)". |
| 82 | skb_headroom() will return how much space is left at the top |
| 83 | of the buffer (before the main data). Remember, this headroom |
| 84 | space must be reserved before the skb_put() function is called. |
| 85 | */ |
| 86 | |
| 87 | /* |
| 88 | This version of net/ipv4/ipip.c is cloned of net/ipv4/ip_gre.c |
| 89 | |
| 90 | For comments look at net/ipv4/ip_gre.c --ANK |
| 91 | */ |
| 92 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 93 | |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 94 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | #include <linux/module.h> |
| 96 | #include <linux/types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | #include <linux/kernel.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 98 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | #include <asm/uaccess.h> |
| 100 | #include <linux/skbuff.h> |
| 101 | #include <linux/netdevice.h> |
| 102 | #include <linux/in.h> |
| 103 | #include <linux/tcp.h> |
| 104 | #include <linux/udp.h> |
| 105 | #include <linux/if_arp.h> |
| 106 | #include <linux/mroute.h> |
| 107 | #include <linux/init.h> |
| 108 | #include <linux/netfilter_ipv4.h> |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 109 | #include <linux/if_ether.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | |
| 111 | #include <net/sock.h> |
| 112 | #include <net/ip.h> |
| 113 | #include <net/icmp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | #include <net/ipip.h> |
| 115 | #include <net/inet_ecn.h> |
| 116 | #include <net/xfrm.h> |
Pavel Emelyanov | 10dc4c7 | 2008-04-16 01:03:13 -0700 | [diff] [blame] | 117 | #include <net/net_namespace.h> |
| 118 | #include <net/netns/generic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | |
| 120 | #define HASH_SIZE 16 |
Al Viro | d5a0a1e | 2006-11-08 00:23:14 -0800 | [diff] [blame] | 121 | #define HASH(addr) (((__force u32)addr^((__force u32)addr>>4))&0xF) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | |
Eric Dumazet | f99189b | 2009-11-17 10:42:49 +0000 | [diff] [blame] | 123 | static int ipip_net_id __read_mostly; |
Pavel Emelyanov | 10dc4c7 | 2008-04-16 01:03:13 -0700 | [diff] [blame] | 124 | struct ipip_net { |
Eric Dumazet | b7285b7 | 2010-09-15 11:07:24 +0000 | [diff] [blame] | 125 | struct ip_tunnel __rcu *tunnels_r_l[HASH_SIZE]; |
| 126 | struct ip_tunnel __rcu *tunnels_r[HASH_SIZE]; |
| 127 | struct ip_tunnel __rcu *tunnels_l[HASH_SIZE]; |
| 128 | struct ip_tunnel __rcu *tunnels_wc[1]; |
| 129 | struct ip_tunnel __rcu **tunnels[4]; |
Pavel Emelyanov | 44d3c29 | 2008-04-16 01:05:32 -0700 | [diff] [blame] | 130 | |
Pavel Emelyanov | b9855c5 | 2008-04-16 01:04:13 -0700 | [diff] [blame] | 131 | struct net_device *fb_tunnel_dev; |
Pavel Emelyanov | 10dc4c7 | 2008-04-16 01:03:13 -0700 | [diff] [blame] | 132 | }; |
| 133 | |
Eric Dumazet | 3c97af9 | 2010-09-27 00:35:50 +0000 | [diff] [blame] | 134 | static int ipip_tunnel_init(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | static void ipip_tunnel_setup(struct net_device *dev); |
Eric Dumazet | 3c97af9 | 2010-09-27 00:35:50 +0000 | [diff] [blame] | 136 | static void ipip_dev_free(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | |
Eric Dumazet | 8f95dd6 | 2009-10-23 05:42:02 +0000 | [diff] [blame] | 138 | /* |
Eric Dumazet | b7285b7 | 2010-09-15 11:07:24 +0000 | [diff] [blame] | 139 | * Locking : hash tables are protected by RCU and RTNL |
Eric Dumazet | 8f95dd6 | 2009-10-23 05:42:02 +0000 | [diff] [blame] | 140 | */ |
Eric Dumazet | 8f95dd6 | 2009-10-23 05:42:02 +0000 | [diff] [blame] | 141 | |
| 142 | #define for_each_ip_tunnel_rcu(start) \ |
| 143 | for (t = rcu_dereference(start); t; t = rcu_dereference(t->next)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | |
Eric Dumazet | 3c97af9 | 2010-09-27 00:35:50 +0000 | [diff] [blame] | 145 | /* often modified stats are per cpu, other are shared (netdev->stats) */ |
| 146 | struct pcpu_tstats { |
| 147 | unsigned long rx_packets; |
| 148 | unsigned long rx_bytes; |
| 149 | unsigned long tx_packets; |
| 150 | unsigned long tx_bytes; |
| 151 | }; |
| 152 | |
| 153 | static struct net_device_stats *ipip_get_stats(struct net_device *dev) |
| 154 | { |
| 155 | struct pcpu_tstats sum = { 0 }; |
| 156 | int i; |
| 157 | |
| 158 | for_each_possible_cpu(i) { |
| 159 | const struct pcpu_tstats *tstats = per_cpu_ptr(dev->tstats, i); |
| 160 | |
| 161 | sum.rx_packets += tstats->rx_packets; |
| 162 | sum.rx_bytes += tstats->rx_bytes; |
| 163 | sum.tx_packets += tstats->tx_packets; |
| 164 | sum.tx_bytes += tstats->tx_bytes; |
| 165 | } |
| 166 | dev->stats.rx_packets = sum.rx_packets; |
| 167 | dev->stats.rx_bytes = sum.rx_bytes; |
| 168 | dev->stats.tx_packets = sum.tx_packets; |
| 169 | dev->stats.tx_bytes = sum.tx_bytes; |
| 170 | return &dev->stats; |
| 171 | } |
| 172 | |
Pavel Emelyanov | b9fae5c | 2008-04-16 01:04:35 -0700 | [diff] [blame] | 173 | static struct ip_tunnel * ipip_tunnel_lookup(struct net *net, |
| 174 | __be32 remote, __be32 local) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | { |
Eric Dumazet | b7285b7 | 2010-09-15 11:07:24 +0000 | [diff] [blame] | 176 | unsigned int h0 = HASH(remote); |
| 177 | unsigned int h1 = HASH(local); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | struct ip_tunnel *t; |
Pavel Emelyanov | 44d3c29 | 2008-04-16 01:05:32 -0700 | [diff] [blame] | 179 | struct ipip_net *ipn = net_generic(net, ipip_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | |
Eric Dumazet | 8f95dd6 | 2009-10-23 05:42:02 +0000 | [diff] [blame] | 181 | for_each_ip_tunnel_rcu(ipn->tunnels_r_l[h0 ^ h1]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | if (local == t->parms.iph.saddr && |
| 183 | remote == t->parms.iph.daddr && (t->dev->flags&IFF_UP)) |
| 184 | return t; |
Eric Dumazet | 8f95dd6 | 2009-10-23 05:42:02 +0000 | [diff] [blame] | 185 | |
| 186 | for_each_ip_tunnel_rcu(ipn->tunnels_r[h0]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | if (remote == t->parms.iph.daddr && (t->dev->flags&IFF_UP)) |
| 188 | return t; |
Eric Dumazet | 8f95dd6 | 2009-10-23 05:42:02 +0000 | [diff] [blame] | 189 | |
| 190 | for_each_ip_tunnel_rcu(ipn->tunnels_l[h1]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | if (local == t->parms.iph.saddr && (t->dev->flags&IFF_UP)) |
| 192 | return t; |
Eric Dumazet | 8f95dd6 | 2009-10-23 05:42:02 +0000 | [diff] [blame] | 193 | |
| 194 | t = rcu_dereference(ipn->tunnels_wc[0]); |
| 195 | if (t && (t->dev->flags&IFF_UP)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | return t; |
| 197 | return NULL; |
| 198 | } |
| 199 | |
Eric Dumazet | b7285b7 | 2010-09-15 11:07:24 +0000 | [diff] [blame] | 200 | static struct ip_tunnel __rcu **__ipip_bucket(struct ipip_net *ipn, |
Pavel Emelyanov | b9fae5c | 2008-04-16 01:04:35 -0700 | [diff] [blame] | 201 | struct ip_tunnel_parm *parms) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | { |
YOSHIFUJI Hideaki | 87d1a16 | 2007-04-24 20:44:47 +0900 | [diff] [blame] | 203 | __be32 remote = parms->iph.daddr; |
| 204 | __be32 local = parms->iph.saddr; |
Eric Dumazet | b7285b7 | 2010-09-15 11:07:24 +0000 | [diff] [blame] | 205 | unsigned int h = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | int prio = 0; |
| 207 | |
| 208 | if (remote) { |
| 209 | prio |= 2; |
| 210 | h ^= HASH(remote); |
| 211 | } |
| 212 | if (local) { |
| 213 | prio |= 1; |
| 214 | h ^= HASH(local); |
| 215 | } |
Pavel Emelyanov | 44d3c29 | 2008-04-16 01:05:32 -0700 | [diff] [blame] | 216 | return &ipn->tunnels[prio][h]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | } |
| 218 | |
Eric Dumazet | b7285b7 | 2010-09-15 11:07:24 +0000 | [diff] [blame] | 219 | static inline struct ip_tunnel __rcu **ipip_bucket(struct ipip_net *ipn, |
Pavel Emelyanov | b9fae5c | 2008-04-16 01:04:35 -0700 | [diff] [blame] | 220 | struct ip_tunnel *t) |
YOSHIFUJI Hideaki | 87d1a16 | 2007-04-24 20:44:47 +0900 | [diff] [blame] | 221 | { |
Pavel Emelyanov | b9fae5c | 2008-04-16 01:04:35 -0700 | [diff] [blame] | 222 | return __ipip_bucket(ipn, &t->parms); |
YOSHIFUJI Hideaki | 87d1a16 | 2007-04-24 20:44:47 +0900 | [diff] [blame] | 223 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | |
Pavel Emelyanov | b9fae5c | 2008-04-16 01:04:35 -0700 | [diff] [blame] | 225 | static void ipip_tunnel_unlink(struct ipip_net *ipn, struct ip_tunnel *t) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | { |
Eric Dumazet | b7285b7 | 2010-09-15 11:07:24 +0000 | [diff] [blame] | 227 | struct ip_tunnel __rcu **tp; |
| 228 | struct ip_tunnel *iter; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | |
Eric Dumazet | b7285b7 | 2010-09-15 11:07:24 +0000 | [diff] [blame] | 230 | for (tp = ipip_bucket(ipn, t); |
| 231 | (iter = rtnl_dereference(*tp)) != NULL; |
| 232 | tp = &iter->next) { |
| 233 | if (t == iter) { |
| 234 | rcu_assign_pointer(*tp, t->next); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | break; |
| 236 | } |
| 237 | } |
| 238 | } |
| 239 | |
Pavel Emelyanov | b9fae5c | 2008-04-16 01:04:35 -0700 | [diff] [blame] | 240 | static void ipip_tunnel_link(struct ipip_net *ipn, struct ip_tunnel *t) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | { |
Eric Dumazet | b7285b7 | 2010-09-15 11:07:24 +0000 | [diff] [blame] | 242 | struct ip_tunnel __rcu **tp = ipip_bucket(ipn, t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | |
Eric Dumazet | b7285b7 | 2010-09-15 11:07:24 +0000 | [diff] [blame] | 244 | rcu_assign_pointer(t->next, rtnl_dereference(*tp)); |
Eric Dumazet | 8f95dd6 | 2009-10-23 05:42:02 +0000 | [diff] [blame] | 245 | rcu_assign_pointer(*tp, t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | } |
| 247 | |
Pavel Emelyanov | b9fae5c | 2008-04-16 01:04:35 -0700 | [diff] [blame] | 248 | static struct ip_tunnel * ipip_tunnel_locate(struct net *net, |
| 249 | struct ip_tunnel_parm *parms, int create) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | { |
Al Viro | d5a0a1e | 2006-11-08 00:23:14 -0800 | [diff] [blame] | 251 | __be32 remote = parms->iph.daddr; |
| 252 | __be32 local = parms->iph.saddr; |
Eric Dumazet | b7285b7 | 2010-09-15 11:07:24 +0000 | [diff] [blame] | 253 | struct ip_tunnel *t, *nt; |
| 254 | struct ip_tunnel __rcu **tp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | struct net_device *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | char name[IFNAMSIZ]; |
Pavel Emelyanov | b9fae5c | 2008-04-16 01:04:35 -0700 | [diff] [blame] | 257 | struct ipip_net *ipn = net_generic(net, ipip_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | |
Eric Dumazet | b7285b7 | 2010-09-15 11:07:24 +0000 | [diff] [blame] | 259 | for (tp = __ipip_bucket(ipn, parms); |
| 260 | (t = rtnl_dereference(*tp)) != NULL; |
| 261 | tp = &t->next) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | if (local == t->parms.iph.saddr && remote == t->parms.iph.daddr) |
| 263 | return t; |
| 264 | } |
| 265 | if (!create) |
| 266 | return NULL; |
| 267 | |
| 268 | if (parms->name[0]) |
| 269 | strlcpy(name, parms->name, IFNAMSIZ); |
Pavel Emelyanov | 34cc7ba | 2008-02-23 20:19:20 -0800 | [diff] [blame] | 270 | else |
Eric Dumazet | 3c97af9 | 2010-09-27 00:35:50 +0000 | [diff] [blame] | 271 | strcpy(name, "tunl%d"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | |
| 273 | dev = alloc_netdev(sizeof(*t), name, ipip_tunnel_setup); |
| 274 | if (dev == NULL) |
| 275 | return NULL; |
| 276 | |
Pavel Emelyanov | 0a82640 | 2008-04-16 01:06:18 -0700 | [diff] [blame] | 277 | dev_net_set(dev, net); |
| 278 | |
Pavel Emelyanov | b37d428 | 2008-02-26 23:51:04 -0800 | [diff] [blame] | 279 | if (strchr(name, '%')) { |
| 280 | if (dev_alloc_name(dev, name) < 0) |
| 281 | goto failed_free; |
| 282 | } |
| 283 | |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 284 | nt = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | nt->parms = *parms; |
| 286 | |
Eric Dumazet | 3c97af9 | 2010-09-27 00:35:50 +0000 | [diff] [blame] | 287 | if (ipip_tunnel_init(dev) < 0) |
| 288 | goto failed_free; |
Stephen Hemminger | 23a12b1 | 2008-11-20 20:33:21 -0800 | [diff] [blame] | 289 | |
Pavel Emelyanov | b37d428 | 2008-02-26 23:51:04 -0800 | [diff] [blame] | 290 | if (register_netdevice(dev) < 0) |
| 291 | goto failed_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | |
| 293 | dev_hold(dev); |
Pavel Emelyanov | b9fae5c | 2008-04-16 01:04:35 -0700 | [diff] [blame] | 294 | ipip_tunnel_link(ipn, nt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | return nt; |
| 296 | |
Pavel Emelyanov | b37d428 | 2008-02-26 23:51:04 -0800 | [diff] [blame] | 297 | failed_free: |
Eric Dumazet | 3c97af9 | 2010-09-27 00:35:50 +0000 | [diff] [blame] | 298 | ipip_dev_free(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | return NULL; |
| 300 | } |
| 301 | |
Eric Dumazet | b7285b7 | 2010-09-15 11:07:24 +0000 | [diff] [blame] | 302 | /* called with RTNL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | static void ipip_tunnel_uninit(struct net_device *dev) |
| 304 | { |
Pavel Emelyanov | b9855c5 | 2008-04-16 01:04:13 -0700 | [diff] [blame] | 305 | struct net *net = dev_net(dev); |
| 306 | struct ipip_net *ipn = net_generic(net, ipip_net_id); |
| 307 | |
Eric Dumazet | b7285b7 | 2010-09-15 11:07:24 +0000 | [diff] [blame] | 308 | if (dev == ipn->fb_tunnel_dev) |
| 309 | rcu_assign_pointer(ipn->tunnels_wc[0], NULL); |
| 310 | else |
Pavel Emelyanov | b9fae5c | 2008-04-16 01:04:35 -0700 | [diff] [blame] | 311 | ipip_tunnel_unlink(ipn, netdev_priv(dev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | dev_put(dev); |
| 313 | } |
| 314 | |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 315 | static int ipip_err(struct sk_buff *skb, u32 info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | |
Rami Rosen | 071f92d | 2008-05-21 17:47:54 -0700 | [diff] [blame] | 318 | /* All the routers (except for Linux) return only |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | 8 bytes of packet payload. It means, that precise relaying of |
| 320 | ICMP in the real Internet is absolutely infeasible. |
| 321 | */ |
Jianjun Kong | 5a5f3a8 | 2008-11-03 00:24:34 -0800 | [diff] [blame] | 322 | struct iphdr *iph = (struct iphdr *)skb->data; |
Arnaldo Carvalho de Melo | 88c7664 | 2007-03-13 14:43:18 -0300 | [diff] [blame] | 323 | const int type = icmp_hdr(skb)->type; |
| 324 | const int code = icmp_hdr(skb)->code; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | struct ip_tunnel *t; |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 326 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | |
| 328 | switch (type) { |
| 329 | default: |
| 330 | case ICMP_PARAMETERPROB: |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 331 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | |
| 333 | case ICMP_DEST_UNREACH: |
| 334 | switch (code) { |
| 335 | case ICMP_SR_FAILED: |
| 336 | case ICMP_PORT_UNREACH: |
| 337 | /* Impossible event. */ |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 338 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | case ICMP_FRAG_NEEDED: |
| 340 | /* Soft state for pmtu is maintained by IP core. */ |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 341 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | default: |
| 343 | /* All others are translated to HOST_UNREACH. |
| 344 | rfc2003 contains "deep thoughts" about NET_UNREACH, |
| 345 | I believe they are just ether pollution. --ANK |
| 346 | */ |
| 347 | break; |
| 348 | } |
| 349 | break; |
| 350 | case ICMP_TIME_EXCEEDED: |
| 351 | if (code != ICMP_EXC_TTL) |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 352 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | break; |
| 354 | } |
| 355 | |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 356 | err = -ENOENT; |
| 357 | |
Eric Dumazet | 8f95dd6 | 2009-10-23 05:42:02 +0000 | [diff] [blame] | 358 | rcu_read_lock(); |
Pavel Emelyanov | cec3ffa | 2008-04-16 01:05:03 -0700 | [diff] [blame] | 359 | t = ipip_tunnel_lookup(dev_net(skb->dev), iph->daddr, iph->saddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | if (t == NULL || t->parms.iph.daddr == 0) |
| 361 | goto out; |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 362 | |
| 363 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | if (t->parms.iph.ttl == 0 && type == ICMP_TIME_EXCEEDED) |
| 365 | goto out; |
| 366 | |
Wei Yongjun | 26d94b4 | 2009-02-24 23:36:47 -0800 | [diff] [blame] | 367 | if (time_before(jiffies, t->err_time + IPTUNNEL_ERR_TIMEO)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | t->err_count++; |
| 369 | else |
| 370 | t->err_count = 1; |
| 371 | t->err_time = jiffies; |
| 372 | out: |
Eric Dumazet | 8f95dd6 | 2009-10-23 05:42:02 +0000 | [diff] [blame] | 373 | rcu_read_unlock(); |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 374 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | } |
| 376 | |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 377 | static inline void ipip_ecn_decapsulate(const struct iphdr *outer_iph, |
| 378 | struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | { |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 380 | struct iphdr *inner_iph = ip_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | |
| 382 | if (INET_ECN_is_ce(outer_iph->tos)) |
| 383 | IP_ECN_set_ce(inner_iph); |
| 384 | } |
| 385 | |
| 386 | static int ipip_rcv(struct sk_buff *skb) |
| 387 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | struct ip_tunnel *tunnel; |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 389 | const struct iphdr *iph = ip_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | |
Eric Dumazet | 8f95dd6 | 2009-10-23 05:42:02 +0000 | [diff] [blame] | 391 | rcu_read_lock(); |
Eric Dumazet | 3c97af9 | 2010-09-27 00:35:50 +0000 | [diff] [blame] | 392 | tunnel = ipip_tunnel_lookup(dev_net(skb->dev), iph->saddr, iph->daddr); |
| 393 | if (tunnel != NULL) { |
| 394 | struct pcpu_tstats *tstats; |
| 395 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) { |
Eric Dumazet | 8f95dd6 | 2009-10-23 05:42:02 +0000 | [diff] [blame] | 397 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | kfree_skb(skb); |
| 399 | return 0; |
| 400 | } |
| 401 | |
| 402 | secpath_reset(skb); |
| 403 | |
Arnaldo Carvalho de Melo | b0e380b | 2007-04-10 21:21:55 -0700 | [diff] [blame] | 404 | skb->mac_header = skb->network_header; |
Arnaldo Carvalho de Melo | c1d2bbe | 2007-04-10 20:45:18 -0700 | [diff] [blame] | 405 | skb_reset_network_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | skb->protocol = htons(ETH_P_IP); |
| 407 | skb->pkt_type = PACKET_HOST; |
| 408 | |
Eric Dumazet | 3c97af9 | 2010-09-27 00:35:50 +0000 | [diff] [blame] | 409 | tstats = this_cpu_ptr(tunnel->dev->tstats); |
| 410 | tstats->rx_packets++; |
| 411 | tstats->rx_bytes += skb->len; |
| 412 | |
| 413 | __skb_tunnel_rx(skb, tunnel->dev); |
Eric Dumazet | d19d56d | 2010-05-17 22:36:55 -0700 | [diff] [blame] | 414 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | ipip_ecn_decapsulate(iph, skb); |
Eric Dumazet | 8990f46 | 2010-09-20 00:12:11 +0000 | [diff] [blame] | 416 | |
Eric Dumazet | caf586e | 2010-09-30 21:06:55 +0000 | [diff] [blame] | 417 | netif_rx(skb); |
Eric Dumazet | 8990f46 | 2010-09-20 00:12:11 +0000 | [diff] [blame] | 418 | |
Eric Dumazet | 8f95dd6 | 2009-10-23 05:42:02 +0000 | [diff] [blame] | 419 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | return 0; |
| 421 | } |
Eric Dumazet | 8f95dd6 | 2009-10-23 05:42:02 +0000 | [diff] [blame] | 422 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | return -1; |
| 425 | } |
| 426 | |
| 427 | /* |
| 428 | * This function assumes it is being called from dev_queue_xmit() |
| 429 | * and that skb is filled properly by that function. |
| 430 | */ |
| 431 | |
Stephen Hemminger | 6fef4c0 | 2009-08-31 19:50:41 +0000 | [diff] [blame] | 432 | static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | { |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 434 | struct ip_tunnel *tunnel = netdev_priv(dev); |
Eric Dumazet | 3c97af9 | 2010-09-27 00:35:50 +0000 | [diff] [blame] | 435 | struct pcpu_tstats *tstats; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | struct iphdr *tiph = &tunnel->parms.iph; |
| 437 | u8 tos = tunnel->parms.iph.tos; |
Al Viro | d5a0a1e | 2006-11-08 00:23:14 -0800 | [diff] [blame] | 438 | __be16 df = tiph->frag_off; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | struct rtable *rt; /* Route to the other host */ |
Eric Dumazet | 3c97af9 | 2010-09-27 00:35:50 +0000 | [diff] [blame] | 440 | struct net_device *tdev; /* Device to other host */ |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 441 | struct iphdr *old_iph = ip_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | struct iphdr *iph; /* Our new IP header */ |
Chuck Lever | c2636b4 | 2007-10-23 21:07:32 -0700 | [diff] [blame] | 443 | unsigned int max_headroom; /* The extra header space needed */ |
Al Viro | d5a0a1e | 2006-11-08 00:23:14 -0800 | [diff] [blame] | 444 | __be32 dst = tiph->daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | int mtu; |
| 446 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | if (skb->protocol != htons(ETH_P_IP)) |
| 448 | goto tx_error; |
| 449 | |
Eric Dumazet | 3c97af9 | 2010-09-27 00:35:50 +0000 | [diff] [blame] | 450 | if (tos & 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | tos = old_iph->tos; |
| 452 | |
| 453 | if (!dst) { |
| 454 | /* NBMA tunnel */ |
Eric Dumazet | 511c3f9 | 2009-06-02 05:14:27 +0000 | [diff] [blame] | 455 | if ((rt = skb_rtable(skb)) == NULL) { |
Eric Dumazet | 3c97af9 | 2010-09-27 00:35:50 +0000 | [diff] [blame] | 456 | dev->stats.tx_fifo_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | goto tx_error; |
| 458 | } |
| 459 | if ((dst = rt->rt_gateway) == 0) |
| 460 | goto tx_error_icmp; |
| 461 | } |
| 462 | |
David S. Miller | 78fbfd8 | 2011-03-12 00:00:52 -0500 | [diff] [blame] | 463 | rt = ip_route_output_ports(dev_net(dev), NULL, |
| 464 | dst, tiph->saddr, |
| 465 | 0, 0, |
| 466 | IPPROTO_IPIP, RT_TOS(tos), |
| 467 | tunnel->parms.link); |
| 468 | if (IS_ERR(rt)) { |
| 469 | dev->stats.tx_carrier_errors++; |
| 470 | goto tx_error_icmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | } |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 472 | tdev = rt->dst.dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | |
| 474 | if (tdev == dev) { |
| 475 | ip_rt_put(rt); |
Eric Dumazet | 3c97af9 | 2010-09-27 00:35:50 +0000 | [diff] [blame] | 476 | dev->stats.collisions++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | goto tx_error; |
| 478 | } |
| 479 | |
Herbert Xu | 23ca0c9 | 2009-11-06 10:37:41 +0000 | [diff] [blame] | 480 | df |= old_iph->frag_off & htons(IP_DF); |
| 481 | |
| 482 | if (df) { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 483 | mtu = dst_mtu(&rt->dst) - sizeof(struct iphdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | |
Herbert Xu | 23ca0c9 | 2009-11-06 10:37:41 +0000 | [diff] [blame] | 485 | if (mtu < 68) { |
Eric Dumazet | 3c97af9 | 2010-09-27 00:35:50 +0000 | [diff] [blame] | 486 | dev->stats.collisions++; |
Herbert Xu | 23ca0c9 | 2009-11-06 10:37:41 +0000 | [diff] [blame] | 487 | ip_rt_put(rt); |
| 488 | goto tx_error; |
| 489 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | |
Herbert Xu | 23ca0c9 | 2009-11-06 10:37:41 +0000 | [diff] [blame] | 491 | if (skb_dst(skb)) |
| 492 | skb_dst(skb)->ops->update_pmtu(skb_dst(skb), mtu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | |
Herbert Xu | 23ca0c9 | 2009-11-06 10:37:41 +0000 | [diff] [blame] | 494 | if ((old_iph->frag_off & htons(IP_DF)) && |
| 495 | mtu < ntohs(old_iph->tot_len)) { |
| 496 | icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, |
| 497 | htonl(mtu)); |
| 498 | ip_rt_put(rt); |
| 499 | goto tx_error; |
| 500 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | } |
| 502 | |
| 503 | if (tunnel->err_count > 0) { |
Wei Yongjun | 26d94b4 | 2009-02-24 23:36:47 -0800 | [diff] [blame] | 504 | if (time_before(jiffies, |
| 505 | tunnel->err_time + IPTUNNEL_ERR_TIMEO)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | tunnel->err_count--; |
| 507 | dst_link_failure(skb); |
| 508 | } else |
| 509 | tunnel->err_count = 0; |
| 510 | } |
| 511 | |
| 512 | /* |
| 513 | * Okay, now see if we can stuff it in the buffer as-is. |
| 514 | */ |
| 515 | max_headroom = (LL_RESERVED_SPACE(tdev)+sizeof(struct iphdr)); |
| 516 | |
Patrick McHardy | cfbba49 | 2007-07-09 15:33:40 -0700 | [diff] [blame] | 517 | if (skb_headroom(skb) < max_headroom || skb_shared(skb) || |
| 518 | (skb_cloned(skb) && !skb_clone_writable(skb, 0))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | struct sk_buff *new_skb = skb_realloc_headroom(skb, max_headroom); |
| 520 | if (!new_skb) { |
| 521 | ip_rt_put(rt); |
Eric Dumazet | 3c97af9 | 2010-09-27 00:35:50 +0000 | [diff] [blame] | 522 | dev->stats.tx_dropped++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | dev_kfree_skb(skb); |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 524 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | } |
| 526 | if (skb->sk) |
| 527 | skb_set_owner_w(new_skb, skb->sk); |
| 528 | dev_kfree_skb(skb); |
| 529 | skb = new_skb; |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 530 | old_iph = ip_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | } |
| 532 | |
Arnaldo Carvalho de Melo | b0e380b | 2007-04-10 21:21:55 -0700 | [diff] [blame] | 533 | skb->transport_header = skb->network_header; |
Arnaldo Carvalho de Melo | e2d1bca | 2007-04-10 20:46:21 -0700 | [diff] [blame] | 534 | skb_push(skb, sizeof(struct iphdr)); |
| 535 | skb_reset_network_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); |
Patrick McHardy | 48d5cad | 2006-02-15 15:10:22 -0800 | [diff] [blame] | 537 | IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED | |
| 538 | IPSKB_REROUTED); |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 539 | skb_dst_drop(skb); |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 540 | skb_dst_set(skb, &rt->dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | |
| 542 | /* |
| 543 | * Push down and install the IPIP header. |
| 544 | */ |
| 545 | |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 546 | iph = ip_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | iph->version = 4; |
| 548 | iph->ihl = sizeof(struct iphdr)>>2; |
| 549 | iph->frag_off = df; |
| 550 | iph->protocol = IPPROTO_IPIP; |
| 551 | iph->tos = INET_ECN_encapsulate(tos, old_iph->tos); |
| 552 | iph->daddr = rt->rt_dst; |
| 553 | iph->saddr = rt->rt_src; |
| 554 | |
| 555 | if ((iph->ttl = tiph->ttl) == 0) |
| 556 | iph->ttl = old_iph->ttl; |
| 557 | |
| 558 | nf_reset(skb); |
Eric Dumazet | 3c97af9 | 2010-09-27 00:35:50 +0000 | [diff] [blame] | 559 | tstats = this_cpu_ptr(dev->tstats); |
| 560 | __IPTUNNEL_XMIT(tstats, &dev->stats); |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 561 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | |
| 563 | tx_error_icmp: |
| 564 | dst_link_failure(skb); |
| 565 | tx_error: |
Eric Dumazet | 3c97af9 | 2010-09-27 00:35:50 +0000 | [diff] [blame] | 566 | dev->stats.tx_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | dev_kfree_skb(skb); |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 568 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | } |
| 570 | |
Michal Schmidt | 5533995 | 2007-12-12 11:01:43 -0800 | [diff] [blame] | 571 | static void ipip_tunnel_bind_dev(struct net_device *dev) |
| 572 | { |
| 573 | struct net_device *tdev = NULL; |
| 574 | struct ip_tunnel *tunnel; |
| 575 | struct iphdr *iph; |
| 576 | |
| 577 | tunnel = netdev_priv(dev); |
| 578 | iph = &tunnel->parms.iph; |
| 579 | |
| 580 | if (iph->daddr) { |
David S. Miller | 78fbfd8 | 2011-03-12 00:00:52 -0500 | [diff] [blame] | 581 | struct rtable *rt = ip_route_output_ports(dev_net(dev), NULL, |
| 582 | iph->daddr, iph->saddr, |
| 583 | 0, 0, |
| 584 | IPPROTO_IPIP, |
| 585 | RT_TOS(iph->tos), |
| 586 | tunnel->parms.link); |
Eric Dumazet | 3c97af9 | 2010-09-27 00:35:50 +0000 | [diff] [blame] | 587 | |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 588 | if (!IS_ERR(rt)) { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 589 | tdev = rt->dst.dev; |
Michal Schmidt | 5533995 | 2007-12-12 11:01:43 -0800 | [diff] [blame] | 590 | ip_rt_put(rt); |
| 591 | } |
| 592 | dev->flags |= IFF_POINTOPOINT; |
| 593 | } |
| 594 | |
| 595 | if (!tdev && tunnel->parms.link) |
Pavel Emelyanov | b99f015 | 2008-04-16 01:05:57 -0700 | [diff] [blame] | 596 | tdev = __dev_get_by_index(dev_net(dev), tunnel->parms.link); |
Michal Schmidt | 5533995 | 2007-12-12 11:01:43 -0800 | [diff] [blame] | 597 | |
| 598 | if (tdev) { |
| 599 | dev->hard_header_len = tdev->hard_header_len + sizeof(struct iphdr); |
| 600 | dev->mtu = tdev->mtu - sizeof(struct iphdr); |
| 601 | } |
| 602 | dev->iflink = tunnel->parms.link; |
| 603 | } |
| 604 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | static int |
| 606 | ipip_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd) |
| 607 | { |
| 608 | int err = 0; |
| 609 | struct ip_tunnel_parm p; |
| 610 | struct ip_tunnel *t; |
Pavel Emelyanov | b9855c5 | 2008-04-16 01:04:13 -0700 | [diff] [blame] | 611 | struct net *net = dev_net(dev); |
| 612 | struct ipip_net *ipn = net_generic(net, ipip_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | |
| 614 | switch (cmd) { |
| 615 | case SIOCGETTUNNEL: |
| 616 | t = NULL; |
Pavel Emelyanov | b9855c5 | 2008-04-16 01:04:13 -0700 | [diff] [blame] | 617 | if (dev == ipn->fb_tunnel_dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) { |
| 619 | err = -EFAULT; |
| 620 | break; |
| 621 | } |
Pavel Emelyanov | b9fae5c | 2008-04-16 01:04:35 -0700 | [diff] [blame] | 622 | t = ipip_tunnel_locate(net, &p, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | } |
| 624 | if (t == NULL) |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 625 | t = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | memcpy(&p, &t->parms, sizeof(p)); |
| 627 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p))) |
| 628 | err = -EFAULT; |
| 629 | break; |
| 630 | |
| 631 | case SIOCADDTUNNEL: |
| 632 | case SIOCCHGTUNNEL: |
| 633 | err = -EPERM; |
| 634 | if (!capable(CAP_NET_ADMIN)) |
| 635 | goto done; |
| 636 | |
| 637 | err = -EFAULT; |
| 638 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) |
| 639 | goto done; |
| 640 | |
| 641 | err = -EINVAL; |
| 642 | if (p.iph.version != 4 || p.iph.protocol != IPPROTO_IPIP || |
| 643 | p.iph.ihl != 5 || (p.iph.frag_off&htons(~IP_DF))) |
| 644 | goto done; |
| 645 | if (p.iph.ttl) |
| 646 | p.iph.frag_off |= htons(IP_DF); |
| 647 | |
Pavel Emelyanov | b9fae5c | 2008-04-16 01:04:35 -0700 | [diff] [blame] | 648 | t = ipip_tunnel_locate(net, &p, cmd == SIOCADDTUNNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | |
Pavel Emelyanov | b9855c5 | 2008-04-16 01:04:13 -0700 | [diff] [blame] | 650 | if (dev != ipn->fb_tunnel_dev && cmd == SIOCCHGTUNNEL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | if (t != NULL) { |
| 652 | if (t->dev != dev) { |
| 653 | err = -EEXIST; |
| 654 | break; |
| 655 | } |
| 656 | } else { |
| 657 | if (((dev->flags&IFF_POINTOPOINT) && !p.iph.daddr) || |
| 658 | (!(dev->flags&IFF_POINTOPOINT) && p.iph.daddr)) { |
| 659 | err = -EINVAL; |
| 660 | break; |
| 661 | } |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 662 | t = netdev_priv(dev); |
Pavel Emelyanov | b9fae5c | 2008-04-16 01:04:35 -0700 | [diff] [blame] | 663 | ipip_tunnel_unlink(ipn, t); |
Pavel Emelyanov | 74b0b85 | 2010-10-27 05:43:53 +0000 | [diff] [blame] | 664 | synchronize_net(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | t->parms.iph.saddr = p.iph.saddr; |
| 666 | t->parms.iph.daddr = p.iph.daddr; |
| 667 | memcpy(dev->dev_addr, &p.iph.saddr, 4); |
| 668 | memcpy(dev->broadcast, &p.iph.daddr, 4); |
Pavel Emelyanov | b9fae5c | 2008-04-16 01:04:35 -0700 | [diff] [blame] | 669 | ipip_tunnel_link(ipn, t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | netdev_state_change(dev); |
| 671 | } |
| 672 | } |
| 673 | |
| 674 | if (t) { |
| 675 | err = 0; |
| 676 | if (cmd == SIOCCHGTUNNEL) { |
| 677 | t->parms.iph.ttl = p.iph.ttl; |
| 678 | t->parms.iph.tos = p.iph.tos; |
| 679 | t->parms.iph.frag_off = p.iph.frag_off; |
Michal Schmidt | 5533995 | 2007-12-12 11:01:43 -0800 | [diff] [blame] | 680 | if (t->parms.link != p.link) { |
| 681 | t->parms.link = p.link; |
| 682 | ipip_tunnel_bind_dev(dev); |
| 683 | netdev_state_change(dev); |
| 684 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | } |
| 686 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &t->parms, sizeof(p))) |
| 687 | err = -EFAULT; |
| 688 | } else |
| 689 | err = (cmd == SIOCADDTUNNEL ? -ENOBUFS : -ENOENT); |
| 690 | break; |
| 691 | |
| 692 | case SIOCDELTUNNEL: |
| 693 | err = -EPERM; |
| 694 | if (!capable(CAP_NET_ADMIN)) |
| 695 | goto done; |
| 696 | |
Pavel Emelyanov | b9855c5 | 2008-04-16 01:04:13 -0700 | [diff] [blame] | 697 | if (dev == ipn->fb_tunnel_dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | err = -EFAULT; |
| 699 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) |
| 700 | goto done; |
| 701 | err = -ENOENT; |
Pavel Emelyanov | b9fae5c | 2008-04-16 01:04:35 -0700 | [diff] [blame] | 702 | if ((t = ipip_tunnel_locate(net, &p, 0)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | goto done; |
| 704 | err = -EPERM; |
Pavel Emelyanov | b9855c5 | 2008-04-16 01:04:13 -0700 | [diff] [blame] | 705 | if (t->dev == ipn->fb_tunnel_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | goto done; |
| 707 | dev = t->dev; |
| 708 | } |
Stephen Hemminger | 22f8cde | 2007-02-07 00:09:58 -0800 | [diff] [blame] | 709 | unregister_netdevice(dev); |
| 710 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | break; |
| 712 | |
| 713 | default: |
| 714 | err = -EINVAL; |
| 715 | } |
| 716 | |
| 717 | done: |
| 718 | return err; |
| 719 | } |
| 720 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | static int ipip_tunnel_change_mtu(struct net_device *dev, int new_mtu) |
| 722 | { |
| 723 | if (new_mtu < 68 || new_mtu > 0xFFF8 - sizeof(struct iphdr)) |
| 724 | return -EINVAL; |
| 725 | dev->mtu = new_mtu; |
| 726 | return 0; |
| 727 | } |
| 728 | |
Stephen Hemminger | 23a12b1 | 2008-11-20 20:33:21 -0800 | [diff] [blame] | 729 | static const struct net_device_ops ipip_netdev_ops = { |
| 730 | .ndo_uninit = ipip_tunnel_uninit, |
| 731 | .ndo_start_xmit = ipip_tunnel_xmit, |
| 732 | .ndo_do_ioctl = ipip_tunnel_ioctl, |
| 733 | .ndo_change_mtu = ipip_tunnel_change_mtu, |
Eric Dumazet | 3c97af9 | 2010-09-27 00:35:50 +0000 | [diff] [blame] | 734 | .ndo_get_stats = ipip_get_stats, |
Stephen Hemminger | 23a12b1 | 2008-11-20 20:33:21 -0800 | [diff] [blame] | 735 | }; |
| 736 | |
Eric Dumazet | 3c97af9 | 2010-09-27 00:35:50 +0000 | [diff] [blame] | 737 | static void ipip_dev_free(struct net_device *dev) |
| 738 | { |
| 739 | free_percpu(dev->tstats); |
| 740 | free_netdev(dev); |
| 741 | } |
| 742 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | static void ipip_tunnel_setup(struct net_device *dev) |
| 744 | { |
Stephen Hemminger | 23a12b1 | 2008-11-20 20:33:21 -0800 | [diff] [blame] | 745 | dev->netdev_ops = &ipip_netdev_ops; |
Eric Dumazet | 3c97af9 | 2010-09-27 00:35:50 +0000 | [diff] [blame] | 746 | dev->destructor = ipip_dev_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | |
| 748 | dev->type = ARPHRD_TUNNEL; |
| 749 | dev->hard_header_len = LL_MAX_HEADER + sizeof(struct iphdr); |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 750 | dev->mtu = ETH_DATA_LEN - sizeof(struct iphdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | dev->flags = IFF_NOARP; |
| 752 | dev->iflink = 0; |
| 753 | dev->addr_len = 4; |
Pavel Emelyanov | 0a82640 | 2008-04-16 01:06:18 -0700 | [diff] [blame] | 754 | dev->features |= NETIF_F_NETNS_LOCAL; |
Eric Dumazet | 153f094 | 2010-09-28 00:17:17 +0000 | [diff] [blame] | 755 | dev->features |= NETIF_F_LLTX; |
Eric Dumazet | 28e7221 | 2009-05-28 10:44:30 +0000 | [diff] [blame] | 756 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | } |
| 758 | |
Eric Dumazet | 3c97af9 | 2010-09-27 00:35:50 +0000 | [diff] [blame] | 759 | static int ipip_tunnel_init(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | { |
Stephen Hemminger | 23a12b1 | 2008-11-20 20:33:21 -0800 | [diff] [blame] | 761 | struct ip_tunnel *tunnel = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | |
| 763 | tunnel->dev = dev; |
| 764 | strcpy(tunnel->parms.name, dev->name); |
| 765 | |
| 766 | memcpy(dev->dev_addr, &tunnel->parms.iph.saddr, 4); |
| 767 | memcpy(dev->broadcast, &tunnel->parms.iph.daddr, 4); |
| 768 | |
Michal Schmidt | 5533995 | 2007-12-12 11:01:43 -0800 | [diff] [blame] | 769 | ipip_tunnel_bind_dev(dev); |
Eric Dumazet | 3c97af9 | 2010-09-27 00:35:50 +0000 | [diff] [blame] | 770 | |
| 771 | dev->tstats = alloc_percpu(struct pcpu_tstats); |
| 772 | if (!dev->tstats) |
| 773 | return -ENOMEM; |
| 774 | |
| 775 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | } |
| 777 | |
Eric Dumazet | fada563 | 2010-09-27 23:56:46 +0000 | [diff] [blame] | 778 | static int __net_init ipip_fb_tunnel_init(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | { |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 780 | struct ip_tunnel *tunnel = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | struct iphdr *iph = &tunnel->parms.iph; |
Pavel Emelyanov | 44d3c29 | 2008-04-16 01:05:32 -0700 | [diff] [blame] | 782 | struct ipip_net *ipn = net_generic(dev_net(dev), ipip_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | |
| 784 | tunnel->dev = dev; |
| 785 | strcpy(tunnel->parms.name, dev->name); |
| 786 | |
| 787 | iph->version = 4; |
| 788 | iph->protocol = IPPROTO_IPIP; |
| 789 | iph->ihl = 5; |
| 790 | |
Eric Dumazet | fada563 | 2010-09-27 23:56:46 +0000 | [diff] [blame] | 791 | dev->tstats = alloc_percpu(struct pcpu_tstats); |
| 792 | if (!dev->tstats) |
| 793 | return -ENOMEM; |
| 794 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | dev_hold(dev); |
Eric Dumazet | b7285b7 | 2010-09-15 11:07:24 +0000 | [diff] [blame] | 796 | rcu_assign_pointer(ipn->tunnels_wc[0], tunnel); |
Eric Dumazet | fada563 | 2010-09-27 23:56:46 +0000 | [diff] [blame] | 797 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | } |
| 799 | |
Eric Dumazet | 6dcd814 | 2010-08-30 07:04:14 +0000 | [diff] [blame] | 800 | static struct xfrm_tunnel ipip_handler __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | .handler = ipip_rcv, |
| 802 | .err_handler = ipip_err, |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 803 | .priority = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | }; |
| 805 | |
Stephen Hemminger | 5747a1a | 2009-02-22 00:02:08 -0800 | [diff] [blame] | 806 | static const char banner[] __initconst = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | KERN_INFO "IPv4 over IPv4 tunneling driver\n"; |
| 808 | |
Eric Dumazet | 0694c4c | 2009-10-27 07:06:59 +0000 | [diff] [blame] | 809 | static void ipip_destroy_tunnels(struct ipip_net *ipn, struct list_head *head) |
Pavel Emelyanov | 44d3c29 | 2008-04-16 01:05:32 -0700 | [diff] [blame] | 810 | { |
| 811 | int prio; |
| 812 | |
| 813 | for (prio = 1; prio < 4; prio++) { |
| 814 | int h; |
| 815 | for (h = 0; h < HASH_SIZE; h++) { |
Eric Dumazet | b7285b7 | 2010-09-15 11:07:24 +0000 | [diff] [blame] | 816 | struct ip_tunnel *t; |
Eric Dumazet | 0694c4c | 2009-10-27 07:06:59 +0000 | [diff] [blame] | 817 | |
Eric Dumazet | b7285b7 | 2010-09-15 11:07:24 +0000 | [diff] [blame] | 818 | t = rtnl_dereference(ipn->tunnels[prio][h]); |
Eric Dumazet | 0694c4c | 2009-10-27 07:06:59 +0000 | [diff] [blame] | 819 | while (t != NULL) { |
| 820 | unregister_netdevice_queue(t->dev, head); |
Eric Dumazet | b7285b7 | 2010-09-15 11:07:24 +0000 | [diff] [blame] | 821 | t = rtnl_dereference(t->next); |
Eric Dumazet | 0694c4c | 2009-10-27 07:06:59 +0000 | [diff] [blame] | 822 | } |
Pavel Emelyanov | 44d3c29 | 2008-04-16 01:05:32 -0700 | [diff] [blame] | 823 | } |
| 824 | } |
| 825 | } |
| 826 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 827 | static int __net_init ipip_init_net(struct net *net) |
Pavel Emelyanov | 10dc4c7 | 2008-04-16 01:03:13 -0700 | [diff] [blame] | 828 | { |
Eric W. Biederman | 86de8a6 | 2009-11-29 15:46:14 +0000 | [diff] [blame] | 829 | struct ipip_net *ipn = net_generic(net, ipip_net_id); |
Pavel Emelyanov | 10dc4c7 | 2008-04-16 01:03:13 -0700 | [diff] [blame] | 830 | int err; |
Pavel Emelyanov | 10dc4c7 | 2008-04-16 01:03:13 -0700 | [diff] [blame] | 831 | |
Pavel Emelyanov | 44d3c29 | 2008-04-16 01:05:32 -0700 | [diff] [blame] | 832 | ipn->tunnels[0] = ipn->tunnels_wc; |
| 833 | ipn->tunnels[1] = ipn->tunnels_l; |
| 834 | ipn->tunnels[2] = ipn->tunnels_r; |
| 835 | ipn->tunnels[3] = ipn->tunnels_r_l; |
| 836 | |
Pavel Emelyanov | b9855c5 | 2008-04-16 01:04:13 -0700 | [diff] [blame] | 837 | ipn->fb_tunnel_dev = alloc_netdev(sizeof(struct ip_tunnel), |
| 838 | "tunl0", |
| 839 | ipip_tunnel_setup); |
| 840 | if (!ipn->fb_tunnel_dev) { |
| 841 | err = -ENOMEM; |
| 842 | goto err_alloc_dev; |
| 843 | } |
Alexey Dobriyan | be77e59 | 2008-11-23 17:26:26 -0800 | [diff] [blame] | 844 | dev_net_set(ipn->fb_tunnel_dev, net); |
Pavel Emelyanov | b9855c5 | 2008-04-16 01:04:13 -0700 | [diff] [blame] | 845 | |
Eric Dumazet | fada563 | 2010-09-27 23:56:46 +0000 | [diff] [blame] | 846 | err = ipip_fb_tunnel_init(ipn->fb_tunnel_dev); |
| 847 | if (err) |
| 848 | goto err_reg_dev; |
Pavel Emelyanov | b9855c5 | 2008-04-16 01:04:13 -0700 | [diff] [blame] | 849 | |
| 850 | if ((err = register_netdev(ipn->fb_tunnel_dev))) |
| 851 | goto err_reg_dev; |
| 852 | |
Pavel Emelyanov | 10dc4c7 | 2008-04-16 01:03:13 -0700 | [diff] [blame] | 853 | return 0; |
| 854 | |
Pavel Emelyanov | b9855c5 | 2008-04-16 01:04:13 -0700 | [diff] [blame] | 855 | err_reg_dev: |
Eric Dumazet | fada563 | 2010-09-27 23:56:46 +0000 | [diff] [blame] | 856 | ipip_dev_free(ipn->fb_tunnel_dev); |
Pavel Emelyanov | b9855c5 | 2008-04-16 01:04:13 -0700 | [diff] [blame] | 857 | err_alloc_dev: |
| 858 | /* nothing */ |
Pavel Emelyanov | 10dc4c7 | 2008-04-16 01:03:13 -0700 | [diff] [blame] | 859 | return err; |
| 860 | } |
| 861 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 862 | static void __net_exit ipip_exit_net(struct net *net) |
Pavel Emelyanov | 10dc4c7 | 2008-04-16 01:03:13 -0700 | [diff] [blame] | 863 | { |
Eric W. Biederman | 86de8a6 | 2009-11-29 15:46:14 +0000 | [diff] [blame] | 864 | struct ipip_net *ipn = net_generic(net, ipip_net_id); |
Eric Dumazet | 0694c4c | 2009-10-27 07:06:59 +0000 | [diff] [blame] | 865 | LIST_HEAD(list); |
Pavel Emelyanov | 10dc4c7 | 2008-04-16 01:03:13 -0700 | [diff] [blame] | 866 | |
Pavel Emelyanov | b9855c5 | 2008-04-16 01:04:13 -0700 | [diff] [blame] | 867 | rtnl_lock(); |
Eric Dumazet | 0694c4c | 2009-10-27 07:06:59 +0000 | [diff] [blame] | 868 | ipip_destroy_tunnels(ipn, &list); |
| 869 | unregister_netdevice_queue(ipn->fb_tunnel_dev, &list); |
| 870 | unregister_netdevice_many(&list); |
Pavel Emelyanov | b9855c5 | 2008-04-16 01:04:13 -0700 | [diff] [blame] | 871 | rtnl_unlock(); |
Pavel Emelyanov | 10dc4c7 | 2008-04-16 01:03:13 -0700 | [diff] [blame] | 872 | } |
| 873 | |
| 874 | static struct pernet_operations ipip_net_ops = { |
| 875 | .init = ipip_init_net, |
| 876 | .exit = ipip_exit_net, |
Eric W. Biederman | 86de8a6 | 2009-11-29 15:46:14 +0000 | [diff] [blame] | 877 | .id = &ipip_net_id, |
| 878 | .size = sizeof(struct ipip_net), |
Pavel Emelyanov | 10dc4c7 | 2008-04-16 01:03:13 -0700 | [diff] [blame] | 879 | }; |
| 880 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | static int __init ipip_init(void) |
| 882 | { |
| 883 | int err; |
| 884 | |
| 885 | printk(banner); |
| 886 | |
Eric W. Biederman | 86de8a6 | 2009-11-29 15:46:14 +0000 | [diff] [blame] | 887 | err = register_pernet_device(&ipip_net_ops); |
Alexey Dobriyan | d5aa407 | 2010-02-16 09:05:04 +0000 | [diff] [blame] | 888 | if (err < 0) |
| 889 | return err; |
| 890 | err = xfrm4_tunnel_register(&ipip_handler, AF_INET); |
| 891 | if (err < 0) { |
| 892 | unregister_pernet_device(&ipip_net_ops); |
| 893 | printk(KERN_INFO "ipip init: can't register tunnel\n"); |
| 894 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | } |
| 897 | |
| 898 | static void __exit ipip_fini(void) |
| 899 | { |
Kazunori MIYAZAWA | c0d5640 | 2007-02-13 12:54:47 -0800 | [diff] [blame] | 900 | if (xfrm4_tunnel_deregister(&ipip_handler, AF_INET)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | printk(KERN_INFO "ipip close: can't deregister tunnel\n"); |
| 902 | |
Eric W. Biederman | 86de8a6 | 2009-11-29 15:46:14 +0000 | [diff] [blame] | 903 | unregister_pernet_device(&ipip_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | } |
| 905 | |
| 906 | module_init(ipip_init); |
| 907 | module_exit(ipip_fini); |
| 908 | MODULE_LICENSE("GPL"); |
Vasiliy Kulikov | 8909c9a | 2011-03-02 00:33:13 +0300 | [diff] [blame] | 909 | MODULE_ALIAS_NETDEV("tunl0"); |