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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> | |
f2459fe7 | 25 | #include <linux/skbuff.h> |
a5b7d883 | 26 | #include <linux/version.h> |
f2459fe7 | 27 | |
dd8d6b8c | 28 | #include "checksum.h" |
f2459fe7 | 29 | #include "datapath.h" |
6e0ce48e | 30 | #include "vlan.h" |
b19e8815 | 31 | #include "vport-generic.h" |
f2459fe7 JG |
32 | #include "vport-internal_dev.h" |
33 | #include "vport-netdev.h" | |
34 | ||
4bfff3c8 JG |
35 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0) |
36 | #define HAVE_NET_DEVICE_OPS | |
37 | #endif | |
38 | ||
f2459fe7 | 39 | struct internal_dev { |
7237e4f4 | 40 | struct vport *vport; |
dc670cf5 | 41 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,22) |
f2459fe7 | 42 | struct net_device_stats stats; |
dc670cf5 | 43 | #endif |
f2459fe7 JG |
44 | }; |
45 | ||
6455100f | 46 | static struct internal_dev *internal_dev_priv(struct net_device *netdev) |
f2459fe7 JG |
47 | { |
48 | return netdev_priv(netdev); | |
49 | } | |
50 | ||
f613a0d7 | 51 | /* This function is only called by the kernel network layer.*/ |
dc670cf5 PS |
52 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36) |
53 | static struct rtnl_link_stats64 *internal_dev_get_stats(struct net_device *netdev, | |
54 | struct rtnl_link_stats64 *stats) | |
55 | { | |
56 | #else | |
4ea115b6 | 57 | static struct net_device_stats *internal_dev_sys_stats(struct net_device *netdev) |
f2459fe7 | 58 | { |
dc670cf5 | 59 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,22) |
4ea115b6 | 60 | struct net_device_stats *stats = &internal_dev_priv(netdev)->stats; |
dc670cf5 PS |
61 | #else |
62 | struct net_device_stats *stats = &netdev->stats; | |
63 | #endif | |
64 | #endif | |
850b6b3b | 65 | struct vport *vport = ovs_internal_dev_get_vport(netdev); |
dc670cf5 | 66 | struct ovs_vport_stats vport_stats; |
4ea115b6 | 67 | |
850b6b3b | 68 | ovs_vport_get_stats(vport, &vport_stats); |
dc670cf5 PS |
69 | |
70 | /* The tx and rx stats need to be swapped because the | |
71 | * switch and host OS have opposite perspectives. */ | |
72 | stats->rx_packets = vport_stats.tx_packets; | |
73 | stats->tx_packets = vport_stats.rx_packets; | |
74 | stats->rx_bytes = vport_stats.tx_bytes; | |
75 | stats->tx_bytes = vport_stats.rx_bytes; | |
76 | stats->rx_errors = vport_stats.tx_errors; | |
77 | stats->tx_errors = vport_stats.rx_errors; | |
78 | stats->rx_dropped = vport_stats.tx_dropped; | |
79 | stats->tx_dropped = vport_stats.rx_dropped; | |
4ea115b6 | 80 | |
f2459fe7 JG |
81 | return stats; |
82 | } | |
83 | ||
84 | static int internal_dev_mac_addr(struct net_device *dev, void *p) | |
85 | { | |
86 | struct sockaddr *addr = p; | |
87 | ||
88 | if (!is_valid_ether_addr(addr->sa_data)) | |
89 | return -EADDRNOTAVAIL; | |
55053441 DK |
90 | #ifdef NET_ADDR_RANDOM |
91 | dev->addr_assign_type &= ~NET_ADDR_RANDOM; | |
92 | #endif | |
f2459fe7 JG |
93 | memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); |
94 | return 0; | |
95 | } | |
96 | ||
8a5d84f6 | 97 | /* Called with rcu_read_lock_bh. */ |
f2459fe7 JG |
98 | static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev) |
99 | { | |
c3729ee4 JG |
100 | if (unlikely(compute_ip_summed(skb, true))) { |
101 | kfree_skb(skb); | |
102 | return 0; | |
103 | } | |
104 | ||
6e0ce48e | 105 | vlan_copy_skb_tci(skb); |
3976f6d5 | 106 | OVS_CB(skb)->flow = NULL; |
f4267e34 | 107 | |
8a5d84f6 | 108 | rcu_read_lock(); |
850b6b3b | 109 | ovs_vport_receive(internal_dev_priv(netdev)->vport, skb); |
8a5d84f6 | 110 | rcu_read_unlock(); |
f2459fe7 JG |
111 | return 0; |
112 | } | |
113 | ||
114 | static int internal_dev_open(struct net_device *netdev) | |
115 | { | |
116 | netif_start_queue(netdev); | |
117 | return 0; | |
118 | } | |
119 | ||
120 | static int internal_dev_stop(struct net_device *netdev) | |
121 | { | |
122 | netif_stop_queue(netdev); | |
123 | return 0; | |
124 | } | |
125 | ||
126 | static void internal_dev_getinfo(struct net_device *netdev, | |
127 | struct ethtool_drvinfo *info) | |
128 | { | |
f2459fe7 | 129 | strcpy(info->driver, "openvswitch"); |
f2459fe7 JG |
130 | } |
131 | ||
b279fccf | 132 | static const struct ethtool_ops internal_dev_ethtool_ops = { |
f4267e34 JG |
133 | .get_drvinfo = internal_dev_getinfo, |
134 | .get_link = ethtool_op_get_link, | |
6f17885b | 135 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39) |
f4267e34 JG |
136 | .get_sg = ethtool_op_get_sg, |
137 | .set_sg = ethtool_op_set_sg, | |
138 | .get_tx_csum = ethtool_op_get_tx_csum, | |
139 | .set_tx_csum = ethtool_op_set_tx_hw_csum, | |
140 | .get_tso = ethtool_op_get_tso, | |
141 | .set_tso = ethtool_op_set_tso, | |
6f17885b | 142 | #endif |
f2459fe7 JG |
143 | }; |
144 | ||
145 | static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu) | |
146 | { | |
f2459fe7 JG |
147 | if (new_mtu < 68) |
148 | return -EINVAL; | |
149 | ||
f2459fe7 JG |
150 | netdev->mtu = new_mtu; |
151 | return 0; | |
152 | } | |
153 | ||
6455100f PS |
154 | static int internal_dev_do_ioctl(struct net_device *dev, |
155 | struct ifreq *ifr, int cmd) | |
f2459fe7 | 156 | { |
850b6b3b JG |
157 | if (ovs_dp_ioctl_hook) |
158 | return ovs_dp_ioctl_hook(dev, ifr, cmd); | |
4ea115b6 | 159 | |
f2459fe7 JG |
160 | return -EOPNOTSUPP; |
161 | } | |
162 | ||
8338302d JG |
163 | static void internal_dev_destructor(struct net_device *dev) |
164 | { | |
850b6b3b | 165 | struct vport *vport = ovs_internal_dev_get_vport(dev); |
8338302d | 166 | |
850b6b3b | 167 | ovs_vport_free(vport); |
8338302d JG |
168 | free_netdev(dev); |
169 | } | |
170 | ||
f2459fe7 JG |
171 | #ifdef HAVE_NET_DEVICE_OPS |
172 | static const struct net_device_ops internal_dev_netdev_ops = { | |
f2459fe7 JG |
173 | .ndo_open = internal_dev_open, |
174 | .ndo_stop = internal_dev_stop, | |
175 | .ndo_start_xmit = internal_dev_xmit, | |
176 | .ndo_set_mac_address = internal_dev_mac_addr, | |
177 | .ndo_do_ioctl = internal_dev_do_ioctl, | |
178 | .ndo_change_mtu = internal_dev_change_mtu, | |
dc670cf5 PS |
179 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36) |
180 | .ndo_get_stats64 = internal_dev_get_stats, | |
181 | #else | |
4ea115b6 | 182 | .ndo_get_stats = internal_dev_sys_stats, |
dc670cf5 | 183 | #endif |
f2459fe7 JG |
184 | }; |
185 | #endif | |
186 | ||
fceb2a5b | 187 | static void do_setup(struct net_device *netdev) |
f2459fe7 JG |
188 | { |
189 | ether_setup(netdev); | |
190 | ||
191 | #ifdef HAVE_NET_DEVICE_OPS | |
192 | netdev->netdev_ops = &internal_dev_netdev_ops; | |
193 | #else | |
194 | netdev->do_ioctl = internal_dev_do_ioctl; | |
4ea115b6 | 195 | netdev->get_stats = internal_dev_sys_stats; |
f2459fe7 JG |
196 | netdev->hard_start_xmit = internal_dev_xmit; |
197 | netdev->open = internal_dev_open; | |
198 | netdev->stop = internal_dev_stop; | |
199 | netdev->set_mac_address = internal_dev_mac_addr; | |
200 | netdev->change_mtu = internal_dev_change_mtu; | |
f2459fe7 JG |
201 | #endif |
202 | ||
9c8482e9 | 203 | netdev->priv_flags &= ~IFF_TX_SKB_SHARING; |
8338302d | 204 | netdev->destructor = internal_dev_destructor; |
f2459fe7 JG |
205 | SET_ETHTOOL_OPS(netdev, &internal_dev_ethtool_ops); |
206 | netdev->tx_queue_len = 0; | |
207 | ||
8e6c8ff5 | 208 | netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST | |
2a4999f3 | 209 | NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_TSO; |
f2459fe7 | 210 | |
926ea16e JG |
211 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) |
212 | netdev->vlan_features = netdev->features; | |
213 | netdev->features |= NETIF_F_HW_VLAN_TX; | |
214 | #endif | |
215 | ||
6f17885b PS |
216 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39) |
217 | netdev->hw_features = netdev->features & ~NETIF_F_LLTX; | |
218 | #endif | |
55053441 | 219 | eth_hw_addr_random(netdev); |
f2459fe7 JG |
220 | } |
221 | ||
94903c98 | 222 | static struct vport *internal_dev_create(const struct vport_parms *parms) |
f2459fe7 JG |
223 | { |
224 | struct vport *vport; | |
225 | struct netdev_vport *netdev_vport; | |
226 | struct internal_dev *internal_dev; | |
227 | int err; | |
228 | ||
850b6b3b JG |
229 | vport = ovs_vport_alloc(sizeof(struct netdev_vport), |
230 | &ovs_internal_vport_ops, parms); | |
f2459fe7 JG |
231 | if (IS_ERR(vport)) { |
232 | err = PTR_ERR(vport); | |
233 | goto error; | |
234 | } | |
235 | ||
236 | netdev_vport = netdev_vport_priv(vport); | |
237 | ||
6455100f PS |
238 | netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev), |
239 | parms->name, do_setup); | |
f2459fe7 JG |
240 | if (!netdev_vport->dev) { |
241 | err = -ENOMEM; | |
242 | goto error_free_vport; | |
243 | } | |
244 | ||
2a4999f3 | 245 | dev_net_set(netdev_vport->dev, ovs_dp_get_net(vport->dp)); |
f2459fe7 | 246 | internal_dev = internal_dev_priv(netdev_vport->dev); |
c052da84 | 247 | internal_dev->vport = vport; |
f2459fe7 | 248 | |
2a4999f3 PS |
249 | /* Restrict bridge port to current netns. */ |
250 | if (vport->port_no == OVSP_LOCAL) | |
251 | netdev_vport->dev->features |= NETIF_F_NETNS_LOCAL; | |
252 | ||
f2459fe7 JG |
253 | err = register_netdevice(netdev_vport->dev); |
254 | if (err) | |
255 | goto error_free_netdev; | |
256 | ||
7237e4f4 BP |
257 | dev_set_promiscuity(netdev_vport->dev, 1); |
258 | netif_start_queue(netdev_vport->dev); | |
259 | ||
f2459fe7 JG |
260 | return vport; |
261 | ||
262 | error_free_netdev: | |
263 | free_netdev(netdev_vport->dev); | |
264 | error_free_vport: | |
850b6b3b | 265 | ovs_vport_free(vport); |
f2459fe7 JG |
266 | error: |
267 | return ERR_PTR(err); | |
268 | } | |
269 | ||
3544358a | 270 | static void internal_dev_destroy(struct vport *vport) |
f2459fe7 JG |
271 | { |
272 | struct netdev_vport *netdev_vport = netdev_vport_priv(vport); | |
273 | ||
63db6ec3 | 274 | netif_stop_queue(netdev_vport->dev); |
f2459fe7 | 275 | dev_set_promiscuity(netdev_vport->dev, -1); |
7237e4f4 | 276 | |
057dd6d2 | 277 | /* unregister_netdevice() waits for an RCU grace period. */ |
8338302d | 278 | unregister_netdevice(netdev_vport->dev); |
f2459fe7 JG |
279 | } |
280 | ||
fceb2a5b | 281 | static int internal_dev_recv(struct vport *vport, struct sk_buff *skb) |
f2459fe7 JG |
282 | { |
283 | struct net_device *netdev = netdev_vport_priv(vport)->dev; | |
f2459fe7 JG |
284 | int len; |
285 | ||
6ce39213 JG |
286 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37) |
287 | if (unlikely(vlan_deaccel_tag(skb))) | |
288 | return 0; | |
289 | #endif | |
290 | ||
f2459fe7 | 291 | len = skb->len; |
6ce39213 | 292 | skb->dev = netdev; |
f2459fe7 JG |
293 | skb->pkt_type = PACKET_HOST; |
294 | skb->protocol = eth_type_trans(skb, netdev); | |
c3729ee4 | 295 | forward_ip_summed(skb, false); |
f2459fe7 | 296 | |
e9141eec | 297 | netif_rx(skb); |
a5b7d883 JG |
298 | |
299 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,29) | |
f2459fe7 | 300 | netdev->last_rx = jiffies; |
a5b7d883 | 301 | #endif |
f2459fe7 | 302 | |
f2459fe7 JG |
303 | return len; |
304 | } | |
305 | ||
850b6b3b | 306 | const struct vport_ops ovs_internal_vport_ops = { |
df2c07f4 | 307 | .type = OVS_VPORT_TYPE_INTERNAL, |
f613a0d7 | 308 | .flags = VPORT_F_REQUIRED | VPORT_F_FLOW, |
f2459fe7 JG |
309 | .create = internal_dev_create, |
310 | .destroy = internal_dev_destroy, | |
850b6b3b JG |
311 | .set_addr = ovs_netdev_set_addr, |
312 | .get_name = ovs_netdev_get_name, | |
313 | .get_addr = ovs_netdev_get_addr, | |
314 | .get_kobj = ovs_netdev_get_kobj, | |
315 | .get_dev_flags = ovs_netdev_get_dev_flags, | |
316 | .is_running = ovs_netdev_is_running, | |
317 | .get_operstate = ovs_netdev_get_operstate, | |
318 | .get_ifindex = ovs_netdev_get_ifindex, | |
319 | .get_mtu = ovs_netdev_get_mtu, | |
f2459fe7 JG |
320 | .send = internal_dev_recv, |
321 | }; | |
322 | ||
850b6b3b | 323 | int ovs_is_internal_dev(const struct net_device *netdev) |
f2459fe7 JG |
324 | { |
325 | #ifdef HAVE_NET_DEVICE_OPS | |
326 | return netdev->netdev_ops == &internal_dev_netdev_ops; | |
327 | #else | |
328 | return netdev->open == internal_dev_open; | |
329 | #endif | |
330 | } | |
331 | ||
850b6b3b | 332 | struct vport *ovs_internal_dev_get_vport(struct net_device *netdev) |
f2459fe7 | 333 | { |
850b6b3b | 334 | if (!ovs_is_internal_dev(netdev)) |
17a07f9f | 335 | return NULL; |
7237e4f4 | 336 | |
c052da84 | 337 | return internal_dev_priv(netdev)->vport; |
f2459fe7 | 338 | } |