Commit | Line | Data |
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ccb1352e | 1 | /* |
caf2ee14 | 2 | * Copyright (c) 2007-2012 Nicira, Inc. |
ccb1352e JG |
3 | * |
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 | |
17 | */ | |
18 | ||
19 | #include <linux/hardirq.h> | |
20 | #include <linux/if_vlan.h> | |
21 | #include <linux/kernel.h> | |
22 | #include <linux/netdevice.h> | |
23 | #include <linux/etherdevice.h> | |
24 | #include <linux/ethtool.h> | |
25 | #include <linux/skbuff.h> | |
ccb1352e | 26 | |
7fe99e2d JG |
27 | #include <net/dst.h> |
28 | #include <net/xfrm.h> | |
5b9e7e16 | 29 | #include <net/rtnetlink.h> |
7fe99e2d | 30 | |
ccb1352e JG |
31 | #include "datapath.h" |
32 | #include "vport-internal_dev.h" | |
33 | #include "vport-netdev.h" | |
34 | ||
35 | struct internal_dev { | |
36 | struct vport *vport; | |
37 | }; | |
38 | ||
62b9c8d0 TG |
39 | static struct vport_ops ovs_internal_vport_ops; |
40 | ||
ccb1352e JG |
41 | static struct internal_dev *internal_dev_priv(struct net_device *netdev) |
42 | { | |
43 | return netdev_priv(netdev); | |
44 | } | |
45 | ||
46 | /* This function is only called by the kernel network layer.*/ | |
47 | static struct rtnl_link_stats64 *internal_dev_get_stats(struct net_device *netdev, | |
48 | struct rtnl_link_stats64 *stats) | |
49 | { | |
50 | struct vport *vport = ovs_internal_dev_get_vport(netdev); | |
51 | struct ovs_vport_stats vport_stats; | |
52 | ||
53 | ovs_vport_get_stats(vport, &vport_stats); | |
54 | ||
55 | /* The tx and rx stats need to be swapped because the | |
56 | * switch and host OS have opposite perspectives. */ | |
57 | stats->rx_packets = vport_stats.tx_packets; | |
58 | stats->tx_packets = vport_stats.rx_packets; | |
59 | stats->rx_bytes = vport_stats.tx_bytes; | |
60 | stats->tx_bytes = vport_stats.rx_bytes; | |
61 | stats->rx_errors = vport_stats.tx_errors; | |
62 | stats->tx_errors = vport_stats.rx_errors; | |
63 | stats->rx_dropped = vport_stats.tx_dropped; | |
64 | stats->tx_dropped = vport_stats.rx_dropped; | |
65 | ||
66 | return stats; | |
67 | } | |
68 | ||
ccb1352e JG |
69 | /* Called with rcu_read_lock_bh. */ |
70 | static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev) | |
71 | { | |
72 | rcu_read_lock(); | |
7d5437c7 | 73 | ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL); |
ccb1352e JG |
74 | rcu_read_unlock(); |
75 | return 0; | |
76 | } | |
77 | ||
78 | static int internal_dev_open(struct net_device *netdev) | |
79 | { | |
80 | netif_start_queue(netdev); | |
81 | return 0; | |
82 | } | |
83 | ||
84 | static int internal_dev_stop(struct net_device *netdev) | |
85 | { | |
86 | netif_stop_queue(netdev); | |
87 | return 0; | |
88 | } | |
89 | ||
90 | static void internal_dev_getinfo(struct net_device *netdev, | |
91 | struct ethtool_drvinfo *info) | |
92 | { | |
7826d43f | 93 | strlcpy(info->driver, "openvswitch", sizeof(info->driver)); |
ccb1352e JG |
94 | } |
95 | ||
96 | static const struct ethtool_ops internal_dev_ethtool_ops = { | |
97 | .get_drvinfo = internal_dev_getinfo, | |
98 | .get_link = ethtool_op_get_link, | |
99 | }; | |
100 | ||
101 | static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu) | |
102 | { | |
103 | if (new_mtu < 68) | |
104 | return -EINVAL; | |
105 | ||
106 | netdev->mtu = new_mtu; | |
107 | return 0; | |
108 | } | |
109 | ||
110 | static void internal_dev_destructor(struct net_device *dev) | |
111 | { | |
112 | struct vport *vport = ovs_internal_dev_get_vport(dev); | |
113 | ||
114 | ovs_vport_free(vport); | |
115 | free_netdev(dev); | |
116 | } | |
117 | ||
118 | static const struct net_device_ops internal_dev_netdev_ops = { | |
119 | .ndo_open = internal_dev_open, | |
120 | .ndo_stop = internal_dev_stop, | |
121 | .ndo_start_xmit = internal_dev_xmit, | |
9151991c | 122 | .ndo_set_mac_address = eth_mac_addr, |
ccb1352e JG |
123 | .ndo_change_mtu = internal_dev_change_mtu, |
124 | .ndo_get_stats64 = internal_dev_get_stats, | |
125 | }; | |
126 | ||
5b9e7e16 JP |
127 | static struct rtnl_link_ops internal_dev_link_ops __read_mostly = { |
128 | .kind = "openvswitch", | |
129 | }; | |
130 | ||
ccb1352e JG |
131 | static void do_setup(struct net_device *netdev) |
132 | { | |
133 | ether_setup(netdev); | |
134 | ||
135 | netdev->netdev_ops = &internal_dev_netdev_ops; | |
136 | ||
137 | netdev->priv_flags &= ~IFF_TX_SKB_SHARING; | |
9151991c | 138 | netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE; |
ccb1352e | 139 | netdev->destructor = internal_dev_destructor; |
7ad24ea4 | 140 | netdev->ethtool_ops = &internal_dev_ethtool_ops; |
5b9e7e16 | 141 | netdev->rtnl_link_ops = &internal_dev_link_ops; |
ccb1352e JG |
142 | netdev->tx_queue_len = 0; |
143 | ||
144 | netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST | | |
f6eec614 PS |
145 | NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | |
146 | NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ENCAP_ALL; | |
ccb1352e JG |
147 | |
148 | netdev->vlan_features = netdev->features; | |
f6eec614 | 149 | netdev->hw_enc_features = netdev->features; |
f646968f | 150 | netdev->features |= NETIF_F_HW_VLAN_CTAG_TX; |
ccb1352e | 151 | netdev->hw_features = netdev->features & ~NETIF_F_LLTX; |
f6eec614 | 152 | |
7ce5d222 | 153 | eth_hw_addr_random(netdev); |
ccb1352e JG |
154 | } |
155 | ||
156 | static struct vport *internal_dev_create(const struct vport_parms *parms) | |
157 | { | |
158 | struct vport *vport; | |
159 | struct netdev_vport *netdev_vport; | |
160 | struct internal_dev *internal_dev; | |
161 | int err; | |
162 | ||
163 | vport = ovs_vport_alloc(sizeof(struct netdev_vport), | |
164 | &ovs_internal_vport_ops, parms); | |
165 | if (IS_ERR(vport)) { | |
166 | err = PTR_ERR(vport); | |
167 | goto error; | |
168 | } | |
169 | ||
170 | netdev_vport = netdev_vport_priv(vport); | |
171 | ||
172 | netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev), | |
c835a677 TG |
173 | parms->name, NET_NAME_UNKNOWN, |
174 | do_setup); | |
ccb1352e JG |
175 | if (!netdev_vport->dev) { |
176 | err = -ENOMEM; | |
177 | goto error_free_vport; | |
178 | } | |
179 | ||
46df7b81 | 180 | dev_net_set(netdev_vport->dev, ovs_dp_get_net(vport->dp)); |
ccb1352e JG |
181 | internal_dev = internal_dev_priv(netdev_vport->dev); |
182 | internal_dev->vport = vport; | |
183 | ||
46df7b81 PS |
184 | /* Restrict bridge port to current netns. */ |
185 | if (vport->port_no == OVSP_LOCAL) | |
186 | netdev_vport->dev->features |= NETIF_F_NETNS_LOCAL; | |
187 | ||
8e4e1713 | 188 | rtnl_lock(); |
ccb1352e JG |
189 | err = register_netdevice(netdev_vport->dev); |
190 | if (err) | |
191 | goto error_free_netdev; | |
192 | ||
193 | dev_set_promiscuity(netdev_vport->dev, 1); | |
8e4e1713 | 194 | rtnl_unlock(); |
ccb1352e JG |
195 | netif_start_queue(netdev_vport->dev); |
196 | ||
197 | return vport; | |
198 | ||
199 | error_free_netdev: | |
8e4e1713 | 200 | rtnl_unlock(); |
ccb1352e JG |
201 | free_netdev(netdev_vport->dev); |
202 | error_free_vport: | |
203 | ovs_vport_free(vport); | |
204 | error: | |
205 | return ERR_PTR(err); | |
206 | } | |
207 | ||
208 | static void internal_dev_destroy(struct vport *vport) | |
209 | { | |
210 | struct netdev_vport *netdev_vport = netdev_vport_priv(vport); | |
211 | ||
212 | netif_stop_queue(netdev_vport->dev); | |
8e4e1713 | 213 | rtnl_lock(); |
ccb1352e JG |
214 | dev_set_promiscuity(netdev_vport->dev, -1); |
215 | ||
216 | /* unregister_netdevice() waits for an RCU grace period. */ | |
217 | unregister_netdevice(netdev_vport->dev); | |
8e4e1713 PS |
218 | |
219 | rtnl_unlock(); | |
ccb1352e JG |
220 | } |
221 | ||
222 | static int internal_dev_recv(struct vport *vport, struct sk_buff *skb) | |
223 | { | |
224 | struct net_device *netdev = netdev_vport_priv(vport)->dev; | |
225 | int len; | |
226 | ||
e1f9c356 CL |
227 | if (unlikely(!(netdev->flags & IFF_UP))) { |
228 | kfree_skb(skb); | |
229 | return 0; | |
230 | } | |
231 | ||
ccb1352e | 232 | len = skb->len; |
7fe99e2d JG |
233 | |
234 | skb_dst_drop(skb); | |
235 | nf_reset(skb); | |
236 | secpath_reset(skb); | |
237 | ||
ccb1352e JG |
238 | skb->dev = netdev; |
239 | skb->pkt_type = PACKET_HOST; | |
240 | skb->protocol = eth_type_trans(skb, netdev); | |
b34df5e8 | 241 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); |
ccb1352e JG |
242 | |
243 | netif_rx(skb); | |
244 | ||
245 | return len; | |
246 | } | |
247 | ||
62b9c8d0 | 248 | static struct vport_ops ovs_internal_vport_ops = { |
ccb1352e JG |
249 | .type = OVS_VPORT_TYPE_INTERNAL, |
250 | .create = internal_dev_create, | |
251 | .destroy = internal_dev_destroy, | |
252 | .get_name = ovs_netdev_get_name, | |
ccb1352e JG |
253 | .send = internal_dev_recv, |
254 | }; | |
255 | ||
256 | int ovs_is_internal_dev(const struct net_device *netdev) | |
257 | { | |
258 | return netdev->netdev_ops == &internal_dev_netdev_ops; | |
259 | } | |
260 | ||
261 | struct vport *ovs_internal_dev_get_vport(struct net_device *netdev) | |
262 | { | |
263 | if (!ovs_is_internal_dev(netdev)) | |
264 | return NULL; | |
265 | ||
266 | return internal_dev_priv(netdev)->vport; | |
267 | } | |
5b9e7e16 JP |
268 | |
269 | int ovs_internal_dev_rtnl_link_register(void) | |
270 | { | |
62b9c8d0 TG |
271 | int err; |
272 | ||
273 | err = rtnl_link_register(&internal_dev_link_ops); | |
274 | if (err < 0) | |
275 | return err; | |
276 | ||
277 | err = ovs_vport_ops_register(&ovs_internal_vport_ops); | |
278 | if (err < 0) | |
279 | rtnl_link_unregister(&internal_dev_link_ops); | |
280 | ||
281 | return err; | |
5b9e7e16 JP |
282 | } |
283 | ||
284 | void ovs_internal_dev_rtnl_link_unregister(void) | |
285 | { | |
62b9c8d0 | 286 | ovs_vport_ops_unregister(&ovs_internal_vport_ops); |
5b9e7e16 JP |
287 | rtnl_link_unregister(&internal_dev_link_ops); |
288 | } |