]>
Commit | Line | Data |
---|---|---|
f2459fe7 | 1 | /* |
8063e095 | 2 | * Copyright (c) 2007-2012 Nicira, Inc. |
f2459fe7 | 3 | * |
a9a29d22 JG |
4 | * This program is free software; you can redistribute it and/or |
5 | * modify it under the terms of version 2 of the GNU General Public | |
6 | * License as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
16 | * 02110-1301, USA | |
f2459fe7 JG |
17 | */ |
18 | ||
24b019f8 JP |
19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
20 | ||
f2459fe7 JG |
21 | #include <linux/if_arp.h> |
22 | #include <linux/if_bridge.h> | |
23 | #include <linux/if_vlan.h> | |
24 | #include <linux/kernel.h> | |
25 | #include <linux/llc.h> | |
26 | #include <linux/rtnetlink.h> | |
27 | #include <linux/skbuff.h> | |
2b51596f | 28 | #include <linux/openvswitch.h> |
8063e095 | 29 | #include <linux/export.h> |
f2459fe7 | 30 | |
e23775f2 PS |
31 | #include <net/ip_tunnels.h> |
32 | #include <net/rtnetlink.h> | |
f2459fe7 JG |
33 | |
34 | #include "datapath.h" | |
e23775f2 PS |
35 | #include "gso.h" |
36 | #include "vport.h" | |
f2459fe7 JG |
37 | #include "vport-internal_dev.h" |
38 | #include "vport-netdev.h" | |
39 | ||
5a38795f | 40 | static struct vport_ops ovs_netdev_vport_ops; |
e23775f2 PS |
41 | |
42 | /* Must be called with rcu_read_lock. */ | |
43 | void netdev_port_receive(struct sk_buff *skb, struct ip_tunnel_info *tun_info) | |
44 | { | |
45 | struct vport *vport; | |
46 | ||
47 | vport = ovs_netdev_get_vport(skb->dev); | |
48 | if (unlikely(!vport)) | |
49 | goto error; | |
50 | ||
51 | if (unlikely(skb_warn_if_lro(skb))) | |
52 | goto error; | |
53 | ||
54 | /* Make our own copy of the packet. Otherwise we will mangle the | |
55 | * packet for anyone who came before us (e.g. tcpdump via AF_PACKET). | |
56 | */ | |
57 | skb = skb_share_check(skb, GFP_ATOMIC); | |
58 | if (unlikely(!skb)) | |
59 | return; | |
60 | ||
87b8aff3 YY |
61 | if (skb->dev->type == ARPHRD_ETHER) { |
62 | skb_push(skb, ETH_HLEN); | |
63 | skb_postpush_rcsum(skb, skb->data, ETH_HLEN); | |
64 | } | |
e23775f2 PS |
65 | ovs_vport_receive(vport, skb, tun_info); |
66 | return; | |
67 | error: | |
68 | kfree_skb(skb); | |
69 | } | |
70 | ||
898ba403 AE |
71 | /* Called with rcu_read_lock and bottom-halves disabled. */ |
72 | static rx_handler_result_t netdev_frame_hook(struct sk_buff **pskb) | |
73 | { | |
74 | struct sk_buff *skb = *pskb; | |
898ba403 AE |
75 | |
76 | if (unlikely(skb->pkt_type == PACKET_LOOPBACK)) | |
77 | return RX_HANDLER_PASS; | |
78 | ||
1c95839f | 79 | #ifndef USE_UPSTREAM_TUNNEL |
8063e095 | 80 | netdev_port_receive(skb, NULL); |
f2459fe7 | 81 | #else |
8063e095 | 82 | netdev_port_receive(skb, skb_tunnel_info(skb)); |
f2459fe7 | 83 | #endif |
8063e095 PS |
84 | return RX_HANDLER_CONSUMED; |
85 | } | |
f2459fe7 | 86 | |
f1f60b85 | 87 | static struct net_device *get_dpdev(const struct datapath *dp) |
2b51596f JP |
88 | { |
89 | struct vport *local; | |
90 | ||
91 | local = ovs_vport_ovsl(dp, OVSP_LOCAL); | |
92 | BUG_ON(!local); | |
e23775f2 | 93 | return local->dev; |
2b51596f JP |
94 | } |
95 | ||
e23775f2 | 96 | struct vport *ovs_netdev_link(struct vport *vport, const char *name) |
f2459fe7 | 97 | { |
f2459fe7 JG |
98 | int err; |
99 | ||
e23775f2 PS |
100 | vport->dev = dev_get_by_name(ovs_dp_get_net(vport->dp), name); |
101 | if (!vport->dev) { | |
f2459fe7 JG |
102 | err = -ENODEV; |
103 | goto error_free_vport; | |
104 | } | |
105 | ||
e23775f2 | 106 | if (vport->dev->flags & IFF_LOOPBACK || |
87b8aff3 YY |
107 | (vport->dev->type != ARPHRD_ETHER && |
108 | vport->dev->type != ARPHRD_NONE) || | |
e23775f2 | 109 | ovs_is_internal_dev(vport->dev)) { |
f2459fe7 JG |
110 | err = -EINVAL; |
111 | goto error_put; | |
112 | } | |
113 | ||
cd2a59e9 | 114 | rtnl_lock(); |
e23775f2 | 115 | err = netdev_master_upper_dev_link(vport->dev, |
36d3520b GR |
116 | get_dpdev(vport->dp), |
117 | NULL, NULL, NULL); | |
2b51596f JP |
118 | if (err) |
119 | goto error_unlock; | |
120 | ||
e23775f2 | 121 | err = netdev_rx_handler_register(vport->dev, netdev_frame_hook, |
7237e4f4 BP |
122 | vport); |
123 | if (err) | |
2b51596f | 124 | goto error_master_upper_dev_unlink; |
7237e4f4 | 125 | |
e23775f2 PS |
126 | dev_disable_lro(vport->dev); |
127 | dev_set_promiscuity(vport->dev, 1); | |
128 | vport->dev->priv_flags |= IFF_OVS_DATAPATH; | |
cd2a59e9 | 129 | rtnl_unlock(); |
7237e4f4 | 130 | |
f2459fe7 JG |
131 | return vport; |
132 | ||
2b51596f | 133 | error_master_upper_dev_unlink: |
e23775f2 | 134 | netdev_upper_dev_unlink(vport->dev, get_dpdev(vport->dp)); |
cd2a59e9 PS |
135 | error_unlock: |
136 | rtnl_unlock(); | |
f2459fe7 | 137 | error_put: |
e23775f2 | 138 | dev_put(vport->dev); |
f2459fe7 | 139 | error_free_vport: |
850b6b3b | 140 | ovs_vport_free(vport); |
f2459fe7 JG |
141 | return ERR_PTR(err); |
142 | } | |
e23775f2 PS |
143 | EXPORT_SYMBOL_GPL(ovs_netdev_link); |
144 | ||
145 | static struct vport *netdev_create(const struct vport_parms *parms) | |
146 | { | |
147 | struct vport *vport; | |
148 | ||
149 | vport = ovs_vport_alloc(0, &ovs_netdev_vport_ops, parms); | |
150 | if (IS_ERR(vport)) | |
151 | return vport; | |
152 | ||
153 | return ovs_netdev_link(vport, parms->name); | |
154 | } | |
f2459fe7 | 155 | |
e23775f2 | 156 | static void vport_netdev_free(struct rcu_head *rcu) |
e65361d6 | 157 | { |
e23775f2 | 158 | struct vport *vport = container_of(rcu, struct vport, rcu); |
e65361d6 | 159 | |
e23775f2 PS |
160 | if (vport->dev) |
161 | dev_put(vport->dev); | |
162 | ovs_vport_free(vport); | |
e65361d6 JG |
163 | } |
164 | ||
8e04c6e1 | 165 | void ovs_netdev_detach_dev(struct vport *vport) |
f2459fe7 | 166 | { |
8e04c6e1 | 167 | ASSERT_RTNL(); |
e23775f2 PS |
168 | vport->dev->priv_flags &= ~IFF_OVS_DATAPATH; |
169 | netdev_rx_handler_unregister(vport->dev); | |
170 | netdev_upper_dev_unlink(vport->dev, | |
171 | netdev_master_upper_dev_get(vport->dev)); | |
172 | dev_set_promiscuity(vport->dev, -1); | |
8e04c6e1 AS |
173 | } |
174 | ||
175 | static void netdev_destroy(struct vport *vport) | |
176 | { | |
8e04c6e1 | 177 | rtnl_lock(); |
e23775f2 | 178 | if (vport->dev->priv_flags & IFF_OVS_DATAPATH) |
8e04c6e1 | 179 | ovs_netdev_detach_dev(vport); |
cd2a59e9 | 180 | rtnl_unlock(); |
f2459fe7 | 181 | |
e23775f2 | 182 | call_rcu(&vport->rcu, vport_netdev_free); |
f2459fe7 JG |
183 | } |
184 | ||
e23775f2 | 185 | void ovs_netdev_tunnel_destroy(struct vport *vport) |
24b019f8 | 186 | { |
e23775f2 PS |
187 | rtnl_lock(); |
188 | if (vport->dev->priv_flags & IFF_OVS_DATAPATH) | |
189 | ovs_netdev_detach_dev(vport); | |
f2459fe7 | 190 | |
1e41fa16 PS |
191 | /* We can be invoked by both explicit vport deletion and |
192 | * underlying netdev deregistration; delete the link only | |
193 | * if it's not already shutting down. | |
194 | */ | |
1e41fa16 PS |
195 | if (vport->dev->reg_state == NETREG_REGISTERED) |
196 | rtnl_delete_link(vport->dev); | |
e23775f2 | 197 | dev_put(vport->dev); |
e23775f2 PS |
198 | vport->dev = NULL; |
199 | rtnl_unlock(); | |
24b019f8 | 200 | |
e23775f2 | 201 | call_rcu(&vport->rcu, vport_netdev_free); |
f2459fe7 | 202 | } |
e23775f2 | 203 | EXPORT_SYMBOL_GPL(ovs_netdev_tunnel_destroy); |
f2459fe7 JG |
204 | |
205 | /* Returns null if this device is not attached to a datapath. */ | |
850b6b3b | 206 | struct vport *ovs_netdev_get_vport(struct net_device *dev) |
f2459fe7 | 207 | { |
055dae4f | 208 | if (likely(dev->priv_flags & IFF_OVS_DATAPATH)) |
572e54fa | 209 | return (struct vport *) |
8063e095 | 210 | rcu_dereference_rtnl(dev->rx_handler_data); |
055dae4f | 211 | else |
37f055c7 | 212 | return NULL; |
f2459fe7 JG |
213 | } |
214 | ||
5a38795f | 215 | static struct vport_ops ovs_netdev_vport_ops = { |
df2c07f4 | 216 | .type = OVS_VPORT_TYPE_NETDEV, |
f2459fe7 JG |
217 | .create = netdev_create, |
218 | .destroy = netdev_destroy, | |
e23775f2 | 219 | .send = dev_queue_xmit, |
f2459fe7 | 220 | }; |
106eab5d | 221 | |
5a38795f TG |
222 | int __init ovs_netdev_init(void) |
223 | { | |
224 | return ovs_vport_ops_register(&ovs_netdev_vport_ops); | |
225 | } | |
226 | ||
227 | void ovs_netdev_exit(void) | |
228 | { | |
229 | ovs_vport_ops_unregister(&ovs_netdev_vport_ops); | |
230 | } |