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f2459fe7 | 1 | /* |
e0edde6f | 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 | ||
88211dda | 19 | #include <linux/hardirq.h> |
6ce39213 | 20 | #include <linux/if_vlan.h> |
f2459fe7 JG |
21 | #include <linux/kernel.h> |
22 | #include <linux/netdevice.h> | |
23 | #include <linux/etherdevice.h> | |
24 | #include <linux/ethtool.h> | |
9b764edf | 25 | #include <linux/netdev_features.h> |
f2459fe7 | 26 | #include <linux/skbuff.h> |
a5b7d883 | 27 | #include <linux/version.h> |
f2459fe7 | 28 | |
53e6421b JG |
29 | #include <net/dst.h> |
30 | #include <net/xfrm.h> | |
31 | ||
f2459fe7 | 32 | #include "datapath.h" |
6e0ce48e | 33 | #include "vlan.h" |
f2459fe7 JG |
34 | #include "vport-internal_dev.h" |
35 | #include "vport-netdev.h" | |
36 | ||
f2459fe7 | 37 | struct internal_dev { |
7237e4f4 | 38 | struct vport *vport; |
f2459fe7 JG |
39 | }; |
40 | ||
5a38795f TG |
41 | static struct vport_ops ovs_internal_vport_ops; |
42 | ||
6455100f | 43 | static struct internal_dev *internal_dev_priv(struct net_device *netdev) |
f2459fe7 JG |
44 | { |
45 | return netdev_priv(netdev); | |
46 | } | |
47 | ||
f613a0d7 | 48 | /* This function is only called by the kernel network layer.*/ |
dc670cf5 PS |
49 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36) |
50 | static struct rtnl_link_stats64 *internal_dev_get_stats(struct net_device *netdev, | |
51 | struct rtnl_link_stats64 *stats) | |
52 | { | |
53 | #else | |
4ea115b6 | 54 | static struct net_device_stats *internal_dev_sys_stats(struct net_device *netdev) |
f2459fe7 | 55 | { |
dc670cf5 | 56 | struct net_device_stats *stats = &netdev->stats; |
dc670cf5 | 57 | #endif |
850b6b3b | 58 | struct vport *vport = ovs_internal_dev_get_vport(netdev); |
dc670cf5 | 59 | struct ovs_vport_stats vport_stats; |
4ea115b6 | 60 | |
850b6b3b | 61 | ovs_vport_get_stats(vport, &vport_stats); |
dc670cf5 PS |
62 | |
63 | /* The tx and rx stats need to be swapped because the | |
af465b67 PS |
64 | * switch and host OS have opposite perspectives. |
65 | */ | |
dc670cf5 PS |
66 | stats->rx_packets = vport_stats.tx_packets; |
67 | stats->tx_packets = vport_stats.rx_packets; | |
68 | stats->rx_bytes = vport_stats.tx_bytes; | |
69 | stats->tx_bytes = vport_stats.rx_bytes; | |
70 | stats->rx_errors = vport_stats.tx_errors; | |
71 | stats->tx_errors = vport_stats.rx_errors; | |
72 | stats->rx_dropped = vport_stats.tx_dropped; | |
73 | stats->tx_dropped = vport_stats.rx_dropped; | |
4ea115b6 | 74 | |
f2459fe7 JG |
75 | return stats; |
76 | } | |
77 | ||
8a5d84f6 | 78 | /* Called with rcu_read_lock_bh. */ |
f2459fe7 JG |
79 | static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev) |
80 | { | |
8a5d84f6 | 81 | rcu_read_lock(); |
db0c3134 | 82 | ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL); |
8a5d84f6 | 83 | rcu_read_unlock(); |
f2459fe7 JG |
84 | return 0; |
85 | } | |
86 | ||
87 | static int internal_dev_open(struct net_device *netdev) | |
88 | { | |
89 | netif_start_queue(netdev); | |
90 | return 0; | |
91 | } | |
92 | ||
93 | static int internal_dev_stop(struct net_device *netdev) | |
94 | { | |
95 | netif_stop_queue(netdev); | |
96 | return 0; | |
97 | } | |
98 | ||
99 | static void internal_dev_getinfo(struct net_device *netdev, | |
100 | struct ethtool_drvinfo *info) | |
101 | { | |
c58a0a6b | 102 | strlcpy(info->driver, "openvswitch", sizeof(info->driver)); |
f2459fe7 JG |
103 | } |
104 | ||
b279fccf | 105 | static const struct ethtool_ops internal_dev_ethtool_ops = { |
f4267e34 JG |
106 | .get_drvinfo = internal_dev_getinfo, |
107 | .get_link = ethtool_op_get_link, | |
6f17885b | 108 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39) |
f4267e34 JG |
109 | .get_sg = ethtool_op_get_sg, |
110 | .set_sg = ethtool_op_set_sg, | |
111 | .get_tx_csum = ethtool_op_get_tx_csum, | |
112 | .set_tx_csum = ethtool_op_set_tx_hw_csum, | |
113 | .get_tso = ethtool_op_get_tso, | |
114 | .set_tso = ethtool_op_set_tso, | |
6f17885b | 115 | #endif |
f2459fe7 JG |
116 | }; |
117 | ||
118 | static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu) | |
119 | { | |
f2459fe7 JG |
120 | if (new_mtu < 68) |
121 | return -EINVAL; | |
122 | ||
f2459fe7 JG |
123 | netdev->mtu = new_mtu; |
124 | return 0; | |
125 | } | |
126 | ||
8338302d JG |
127 | static void internal_dev_destructor(struct net_device *dev) |
128 | { | |
850b6b3b | 129 | struct vport *vport = ovs_internal_dev_get_vport(dev); |
8338302d | 130 | |
850b6b3b | 131 | ovs_vport_free(vport); |
8338302d JG |
132 | free_netdev(dev); |
133 | } | |
134 | ||
f2459fe7 | 135 | static const struct net_device_ops internal_dev_netdev_ops = { |
f2459fe7 JG |
136 | .ndo_open = internal_dev_open, |
137 | .ndo_stop = internal_dev_stop, | |
138 | .ndo_start_xmit = internal_dev_xmit, | |
faa61e25 | 139 | .ndo_set_mac_address = eth_mac_addr, |
f2459fe7 | 140 | .ndo_change_mtu = internal_dev_change_mtu, |
dc670cf5 PS |
141 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36) |
142 | .ndo_get_stats64 = internal_dev_get_stats, | |
143 | #else | |
4ea115b6 | 144 | .ndo_get_stats = internal_dev_sys_stats, |
dc670cf5 | 145 | #endif |
f2459fe7 | 146 | }; |
f2459fe7 | 147 | |
5282e284 TG |
148 | static struct rtnl_link_ops internal_dev_link_ops __read_mostly = { |
149 | .kind = "openvswitch", | |
150 | }; | |
151 | ||
fceb2a5b | 152 | static void do_setup(struct net_device *netdev) |
f2459fe7 JG |
153 | { |
154 | ether_setup(netdev); | |
155 | ||
f2459fe7 | 156 | netdev->netdev_ops = &internal_dev_netdev_ops; |
f2459fe7 | 157 | |
9c8482e9 | 158 | netdev->priv_flags &= ~IFF_TX_SKB_SHARING; |
faa61e25 | 159 | netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE; |
8338302d | 160 | netdev->destructor = internal_dev_destructor; |
f6a0c895 | 161 | netdev->ethtool_ops = &internal_dev_ethtool_ops; |
5282e284 | 162 | netdev->rtnl_link_ops = &internal_dev_link_ops; |
f2459fe7 JG |
163 | netdev->tx_queue_len = 0; |
164 | ||
8e6c8ff5 | 165 | netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST | |
c7d084d6 PS |
166 | NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | |
167 | NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ENCAP_ALL; | |
f2459fe7 | 168 | |
926ea16e | 169 | netdev->vlan_features = netdev->features; |
9b764edf | 170 | netdev->features |= NETIF_F_HW_VLAN_CTAG_TX; |
926ea16e | 171 | |
6f17885b PS |
172 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39) |
173 | netdev->hw_features = netdev->features & ~NETIF_F_LLTX; | |
174 | #endif | |
c7d084d6 PS |
175 | |
176 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0) | |
177 | netdev->hw_enc_features = netdev->features; | |
178 | #endif | |
179 | ||
55053441 | 180 | eth_hw_addr_random(netdev); |
f2459fe7 JG |
181 | } |
182 | ||
94903c98 | 183 | static struct vport *internal_dev_create(const struct vport_parms *parms) |
f2459fe7 JG |
184 | { |
185 | struct vport *vport; | |
186 | struct netdev_vport *netdev_vport; | |
187 | struct internal_dev *internal_dev; | |
188 | int err; | |
189 | ||
850b6b3b JG |
190 | vport = ovs_vport_alloc(sizeof(struct netdev_vport), |
191 | &ovs_internal_vport_ops, parms); | |
f2459fe7 JG |
192 | if (IS_ERR(vport)) { |
193 | err = PTR_ERR(vport); | |
194 | goto error; | |
195 | } | |
196 | ||
197 | netdev_vport = netdev_vport_priv(vport); | |
198 | ||
6455100f | 199 | netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev), |
f6a0c895 | 200 | parms->name, NET_NAME_UNKNOWN, do_setup); |
f2459fe7 JG |
201 | if (!netdev_vport->dev) { |
202 | err = -ENOMEM; | |
203 | goto error_free_vport; | |
204 | } | |
205 | ||
2a4999f3 | 206 | dev_net_set(netdev_vport->dev, ovs_dp_get_net(vport->dp)); |
f2459fe7 | 207 | internal_dev = internal_dev_priv(netdev_vport->dev); |
c052da84 | 208 | internal_dev->vport = vport; |
f2459fe7 | 209 | |
2a4999f3 PS |
210 | /* Restrict bridge port to current netns. */ |
211 | if (vport->port_no == OVSP_LOCAL) | |
212 | netdev_vport->dev->features |= NETIF_F_NETNS_LOCAL; | |
213 | ||
cd2a59e9 | 214 | rtnl_lock(); |
f2459fe7 JG |
215 | err = register_netdevice(netdev_vport->dev); |
216 | if (err) | |
217 | goto error_free_netdev; | |
218 | ||
7237e4f4 | 219 | dev_set_promiscuity(netdev_vport->dev, 1); |
cd2a59e9 | 220 | rtnl_unlock(); |
7237e4f4 BP |
221 | netif_start_queue(netdev_vport->dev); |
222 | ||
f2459fe7 JG |
223 | return vport; |
224 | ||
225 | error_free_netdev: | |
cd2a59e9 | 226 | rtnl_unlock(); |
f2459fe7 JG |
227 | free_netdev(netdev_vport->dev); |
228 | error_free_vport: | |
850b6b3b | 229 | ovs_vport_free(vport); |
f2459fe7 JG |
230 | error: |
231 | return ERR_PTR(err); | |
232 | } | |
233 | ||
3544358a | 234 | static void internal_dev_destroy(struct vport *vport) |
f2459fe7 JG |
235 | { |
236 | struct netdev_vport *netdev_vport = netdev_vport_priv(vport); | |
237 | ||
63db6ec3 | 238 | netif_stop_queue(netdev_vport->dev); |
cd2a59e9 | 239 | rtnl_lock(); |
f2459fe7 | 240 | dev_set_promiscuity(netdev_vport->dev, -1); |
7237e4f4 | 241 | |
057dd6d2 | 242 | /* unregister_netdevice() waits for an RCU grace period. */ |
8338302d | 243 | unregister_netdevice(netdev_vport->dev); |
cd2a59e9 PS |
244 | |
245 | rtnl_unlock(); | |
f2459fe7 JG |
246 | } |
247 | ||
fceb2a5b | 248 | static int internal_dev_recv(struct vport *vport, struct sk_buff *skb) |
f2459fe7 JG |
249 | { |
250 | struct net_device *netdev = netdev_vport_priv(vport)->dev; | |
f2459fe7 JG |
251 | int len; |
252 | ||
0077a780 CL |
253 | if (unlikely(!(netdev->flags & IFF_UP))) { |
254 | kfree_skb(skb); | |
255 | return 0; | |
256 | } | |
257 | ||
6ce39213 | 258 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37) |
efd8a18e | 259 | if (skb_vlan_tag_present(skb)) { |
1f649f1c TG |
260 | if (unlikely(!vlan_insert_tag_set_proto(skb, |
261 | skb->vlan_proto, | |
efd8a18e | 262 | skb_vlan_tag_get(skb)))) |
07ac71ea PS |
263 | return 0; |
264 | ||
265 | if (skb->ip_summed == CHECKSUM_COMPLETE) | |
266 | skb->csum = csum_add(skb->csum, | |
267 | csum_partial(skb->data + (2 * ETH_ALEN), | |
268 | VLAN_HLEN, 0)); | |
269 | ||
270 | vlan_set_tci(skb, 0); | |
271 | } | |
6ce39213 JG |
272 | #endif |
273 | ||
f2459fe7 | 274 | len = skb->len; |
53e6421b JG |
275 | |
276 | skb_dst_drop(skb); | |
277 | nf_reset(skb); | |
278 | secpath_reset(skb); | |
279 | ||
6ce39213 | 280 | skb->dev = netdev; |
f2459fe7 JG |
281 | skb->pkt_type = PACKET_HOST; |
282 | skb->protocol = eth_type_trans(skb, netdev); | |
3cfede14 | 283 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); |
f2459fe7 | 284 | |
e9141eec | 285 | netif_rx(skb); |
a5b7d883 | 286 | |
f2459fe7 JG |
287 | return len; |
288 | } | |
289 | ||
5a38795f | 290 | static struct vport_ops ovs_internal_vport_ops = { |
df2c07f4 | 291 | .type = OVS_VPORT_TYPE_INTERNAL, |
f2459fe7 JG |
292 | .create = internal_dev_create, |
293 | .destroy = internal_dev_destroy, | |
850b6b3b | 294 | .get_name = ovs_netdev_get_name, |
f2459fe7 JG |
295 | .send = internal_dev_recv, |
296 | }; | |
297 | ||
850b6b3b | 298 | int ovs_is_internal_dev(const struct net_device *netdev) |
f2459fe7 | 299 | { |
f2459fe7 | 300 | return netdev->netdev_ops == &internal_dev_netdev_ops; |
f2459fe7 JG |
301 | } |
302 | ||
850b6b3b | 303 | struct vport *ovs_internal_dev_get_vport(struct net_device *netdev) |
f2459fe7 | 304 | { |
850b6b3b | 305 | if (!ovs_is_internal_dev(netdev)) |
17a07f9f | 306 | return NULL; |
7237e4f4 | 307 | |
c052da84 | 308 | return internal_dev_priv(netdev)->vport; |
f2459fe7 | 309 | } |
5282e284 TG |
310 | |
311 | int ovs_internal_dev_rtnl_link_register(void) | |
312 | { | |
5a38795f TG |
313 | int err; |
314 | ||
315 | err = rtnl_link_register(&internal_dev_link_ops); | |
316 | if (err < 0) | |
317 | return err; | |
318 | ||
319 | err = ovs_vport_ops_register(&ovs_internal_vport_ops); | |
320 | if (err < 0) | |
321 | rtnl_link_unregister(&internal_dev_link_ops); | |
322 | ||
323 | return err; | |
5282e284 TG |
324 | } |
325 | ||
326 | void ovs_internal_dev_rtnl_link_unregister(void) | |
327 | { | |
5a38795f | 328 | ovs_vport_ops_unregister(&ovs_internal_vport_ops); |
5282e284 TG |
329 | rtnl_link_unregister(&internal_dev_link_ops); |
330 | } |