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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 | |
53e6421b JG |
28 | #include <net/dst.h> |
29 | #include <net/xfrm.h> | |
30 | ||
dd8d6b8c | 31 | #include "checksum.h" |
f2459fe7 | 32 | #include "datapath.h" |
6e0ce48e | 33 | #include "vlan.h" |
f2459fe7 JG |
34 | #include "vport-internal_dev.h" |
35 | #include "vport-netdev.h" | |
36 | ||
4bfff3c8 JG |
37 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0) |
38 | #define HAVE_NET_DEVICE_OPS | |
39 | #endif | |
40 | ||
f2459fe7 | 41 | struct internal_dev { |
7237e4f4 | 42 | struct vport *vport; |
dc670cf5 | 43 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,22) |
f2459fe7 | 44 | struct net_device_stats stats; |
dc670cf5 | 45 | #endif |
f2459fe7 JG |
46 | }; |
47 | ||
6455100f | 48 | static struct internal_dev *internal_dev_priv(struct net_device *netdev) |
f2459fe7 JG |
49 | { |
50 | return netdev_priv(netdev); | |
51 | } | |
52 | ||
f613a0d7 | 53 | /* This function is only called by the kernel network layer.*/ |
dc670cf5 PS |
54 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36) |
55 | static struct rtnl_link_stats64 *internal_dev_get_stats(struct net_device *netdev, | |
56 | struct rtnl_link_stats64 *stats) | |
57 | { | |
58 | #else | |
4ea115b6 | 59 | static struct net_device_stats *internal_dev_sys_stats(struct net_device *netdev) |
f2459fe7 | 60 | { |
dc670cf5 | 61 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,22) |
4ea115b6 | 62 | struct net_device_stats *stats = &internal_dev_priv(netdev)->stats; |
dc670cf5 PS |
63 | #else |
64 | struct net_device_stats *stats = &netdev->stats; | |
65 | #endif | |
66 | #endif | |
850b6b3b | 67 | struct vport *vport = ovs_internal_dev_get_vport(netdev); |
dc670cf5 | 68 | struct ovs_vport_stats vport_stats; |
4ea115b6 | 69 | |
850b6b3b | 70 | ovs_vport_get_stats(vport, &vport_stats); |
dc670cf5 PS |
71 | |
72 | /* The tx and rx stats need to be swapped because the | |
73 | * switch and host OS have opposite perspectives. */ | |
74 | stats->rx_packets = vport_stats.tx_packets; | |
75 | stats->tx_packets = vport_stats.rx_packets; | |
76 | stats->rx_bytes = vport_stats.tx_bytes; | |
77 | stats->tx_bytes = vport_stats.rx_bytes; | |
78 | stats->rx_errors = vport_stats.tx_errors; | |
79 | stats->tx_errors = vport_stats.rx_errors; | |
80 | stats->rx_dropped = vport_stats.tx_dropped; | |
81 | stats->tx_dropped = vport_stats.rx_dropped; | |
4ea115b6 | 82 | |
f2459fe7 JG |
83 | return stats; |
84 | } | |
85 | ||
8a5d84f6 | 86 | /* Called with rcu_read_lock_bh. */ |
f2459fe7 JG |
87 | static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev) |
88 | { | |
c3729ee4 JG |
89 | if (unlikely(compute_ip_summed(skb, true))) { |
90 | kfree_skb(skb); | |
91 | return 0; | |
92 | } | |
93 | ||
6e0ce48e | 94 | vlan_copy_skb_tci(skb); |
f4267e34 | 95 | |
8a5d84f6 | 96 | rcu_read_lock(); |
db0c3134 | 97 | ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL); |
8a5d84f6 | 98 | rcu_read_unlock(); |
f2459fe7 JG |
99 | return 0; |
100 | } | |
101 | ||
102 | static int internal_dev_open(struct net_device *netdev) | |
103 | { | |
104 | netif_start_queue(netdev); | |
105 | return 0; | |
106 | } | |
107 | ||
108 | static int internal_dev_stop(struct net_device *netdev) | |
109 | { | |
110 | netif_stop_queue(netdev); | |
111 | return 0; | |
112 | } | |
113 | ||
114 | static void internal_dev_getinfo(struct net_device *netdev, | |
115 | struct ethtool_drvinfo *info) | |
116 | { | |
c58a0a6b | 117 | strlcpy(info->driver, "openvswitch", sizeof(info->driver)); |
f2459fe7 JG |
118 | } |
119 | ||
b279fccf | 120 | static const struct ethtool_ops internal_dev_ethtool_ops = { |
f4267e34 JG |
121 | .get_drvinfo = internal_dev_getinfo, |
122 | .get_link = ethtool_op_get_link, | |
6f17885b | 123 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39) |
f4267e34 JG |
124 | .get_sg = ethtool_op_get_sg, |
125 | .set_sg = ethtool_op_set_sg, | |
126 | .get_tx_csum = ethtool_op_get_tx_csum, | |
127 | .set_tx_csum = ethtool_op_set_tx_hw_csum, | |
128 | .get_tso = ethtool_op_get_tso, | |
129 | .set_tso = ethtool_op_set_tso, | |
6f17885b | 130 | #endif |
f2459fe7 JG |
131 | }; |
132 | ||
133 | static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu) | |
134 | { | |
f2459fe7 JG |
135 | if (new_mtu < 68) |
136 | return -EINVAL; | |
137 | ||
f2459fe7 JG |
138 | netdev->mtu = new_mtu; |
139 | return 0; | |
140 | } | |
141 | ||
8338302d JG |
142 | static void internal_dev_destructor(struct net_device *dev) |
143 | { | |
850b6b3b | 144 | struct vport *vport = ovs_internal_dev_get_vport(dev); |
8338302d | 145 | |
850b6b3b | 146 | ovs_vport_free(vport); |
8338302d JG |
147 | free_netdev(dev); |
148 | } | |
149 | ||
f2459fe7 JG |
150 | #ifdef HAVE_NET_DEVICE_OPS |
151 | static const struct net_device_ops internal_dev_netdev_ops = { | |
f2459fe7 JG |
152 | .ndo_open = internal_dev_open, |
153 | .ndo_stop = internal_dev_stop, | |
154 | .ndo_start_xmit = internal_dev_xmit, | |
faa61e25 | 155 | .ndo_set_mac_address = eth_mac_addr, |
f2459fe7 | 156 | .ndo_change_mtu = internal_dev_change_mtu, |
dc670cf5 PS |
157 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36) |
158 | .ndo_get_stats64 = internal_dev_get_stats, | |
159 | #else | |
4ea115b6 | 160 | .ndo_get_stats = internal_dev_sys_stats, |
dc670cf5 | 161 | #endif |
f2459fe7 JG |
162 | }; |
163 | #endif | |
164 | ||
fceb2a5b | 165 | static void do_setup(struct net_device *netdev) |
f2459fe7 JG |
166 | { |
167 | ether_setup(netdev); | |
168 | ||
169 | #ifdef HAVE_NET_DEVICE_OPS | |
170 | netdev->netdev_ops = &internal_dev_netdev_ops; | |
171 | #else | |
4ea115b6 | 172 | netdev->get_stats = internal_dev_sys_stats; |
f2459fe7 JG |
173 | netdev->hard_start_xmit = internal_dev_xmit; |
174 | netdev->open = internal_dev_open; | |
175 | netdev->stop = internal_dev_stop; | |
176 | netdev->set_mac_address = internal_dev_mac_addr; | |
177 | netdev->change_mtu = internal_dev_change_mtu; | |
f2459fe7 JG |
178 | #endif |
179 | ||
9c8482e9 | 180 | netdev->priv_flags &= ~IFF_TX_SKB_SHARING; |
faa61e25 | 181 | netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE; |
8338302d | 182 | netdev->destructor = internal_dev_destructor; |
f2459fe7 JG |
183 | SET_ETHTOOL_OPS(netdev, &internal_dev_ethtool_ops); |
184 | netdev->tx_queue_len = 0; | |
185 | ||
8e6c8ff5 | 186 | netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST | |
2a4999f3 | 187 | NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_TSO; |
f2459fe7 | 188 | |
926ea16e JG |
189 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) |
190 | netdev->vlan_features = netdev->features; | |
191 | netdev->features |= NETIF_F_HW_VLAN_TX; | |
192 | #endif | |
193 | ||
6f17885b PS |
194 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39) |
195 | netdev->hw_features = netdev->features & ~NETIF_F_LLTX; | |
196 | #endif | |
55053441 | 197 | eth_hw_addr_random(netdev); |
f2459fe7 JG |
198 | } |
199 | ||
94903c98 | 200 | static struct vport *internal_dev_create(const struct vport_parms *parms) |
f2459fe7 JG |
201 | { |
202 | struct vport *vport; | |
203 | struct netdev_vport *netdev_vport; | |
204 | struct internal_dev *internal_dev; | |
205 | int err; | |
206 | ||
850b6b3b JG |
207 | vport = ovs_vport_alloc(sizeof(struct netdev_vport), |
208 | &ovs_internal_vport_ops, parms); | |
f2459fe7 JG |
209 | if (IS_ERR(vport)) { |
210 | err = PTR_ERR(vport); | |
211 | goto error; | |
212 | } | |
213 | ||
214 | netdev_vport = netdev_vport_priv(vport); | |
215 | ||
6455100f PS |
216 | netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev), |
217 | parms->name, do_setup); | |
f2459fe7 JG |
218 | if (!netdev_vport->dev) { |
219 | err = -ENOMEM; | |
220 | goto error_free_vport; | |
221 | } | |
222 | ||
2a4999f3 | 223 | dev_net_set(netdev_vport->dev, ovs_dp_get_net(vport->dp)); |
f2459fe7 | 224 | internal_dev = internal_dev_priv(netdev_vport->dev); |
c052da84 | 225 | internal_dev->vport = vport; |
f2459fe7 | 226 | |
2a4999f3 PS |
227 | /* Restrict bridge port to current netns. */ |
228 | if (vport->port_no == OVSP_LOCAL) | |
229 | netdev_vport->dev->features |= NETIF_F_NETNS_LOCAL; | |
230 | ||
cd2a59e9 | 231 | rtnl_lock(); |
f2459fe7 JG |
232 | err = register_netdevice(netdev_vport->dev); |
233 | if (err) | |
234 | goto error_free_netdev; | |
235 | ||
7237e4f4 | 236 | dev_set_promiscuity(netdev_vport->dev, 1); |
cd2a59e9 | 237 | rtnl_unlock(); |
7237e4f4 BP |
238 | netif_start_queue(netdev_vport->dev); |
239 | ||
f2459fe7 JG |
240 | return vport; |
241 | ||
242 | error_free_netdev: | |
cd2a59e9 | 243 | rtnl_unlock(); |
f2459fe7 JG |
244 | free_netdev(netdev_vport->dev); |
245 | error_free_vport: | |
850b6b3b | 246 | ovs_vport_free(vport); |
f2459fe7 JG |
247 | error: |
248 | return ERR_PTR(err); | |
249 | } | |
250 | ||
3544358a | 251 | static void internal_dev_destroy(struct vport *vport) |
f2459fe7 JG |
252 | { |
253 | struct netdev_vport *netdev_vport = netdev_vport_priv(vport); | |
254 | ||
63db6ec3 | 255 | netif_stop_queue(netdev_vport->dev); |
cd2a59e9 | 256 | rtnl_lock(); |
f2459fe7 | 257 | dev_set_promiscuity(netdev_vport->dev, -1); |
7237e4f4 | 258 | |
057dd6d2 | 259 | /* unregister_netdevice() waits for an RCU grace period. */ |
8338302d | 260 | unregister_netdevice(netdev_vport->dev); |
cd2a59e9 PS |
261 | |
262 | rtnl_unlock(); | |
f2459fe7 JG |
263 | } |
264 | ||
fceb2a5b | 265 | static int internal_dev_recv(struct vport *vport, struct sk_buff *skb) |
f2459fe7 JG |
266 | { |
267 | struct net_device *netdev = netdev_vport_priv(vport)->dev; | |
f2459fe7 JG |
268 | int len; |
269 | ||
6ce39213 JG |
270 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37) |
271 | if (unlikely(vlan_deaccel_tag(skb))) | |
272 | return 0; | |
273 | #endif | |
274 | ||
f2459fe7 | 275 | len = skb->len; |
53e6421b JG |
276 | |
277 | skb_dst_drop(skb); | |
278 | nf_reset(skb); | |
279 | secpath_reset(skb); | |
280 | ||
6ce39213 | 281 | skb->dev = netdev; |
f2459fe7 JG |
282 | skb->pkt_type = PACKET_HOST; |
283 | skb->protocol = eth_type_trans(skb, netdev); | |
3cfede14 | 284 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); |
c3729ee4 | 285 | forward_ip_summed(skb, false); |
f2459fe7 | 286 | |
e9141eec | 287 | netif_rx(skb); |
a5b7d883 JG |
288 | |
289 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,29) | |
f2459fe7 | 290 | netdev->last_rx = jiffies; |
a5b7d883 | 291 | #endif |
f2459fe7 | 292 | |
f2459fe7 JG |
293 | return len; |
294 | } | |
295 | ||
850b6b3b | 296 | const struct vport_ops ovs_internal_vport_ops = { |
df2c07f4 | 297 | .type = OVS_VPORT_TYPE_INTERNAL, |
f2459fe7 JG |
298 | .create = internal_dev_create, |
299 | .destroy = internal_dev_destroy, | |
850b6b3b | 300 | .get_name = ovs_netdev_get_name, |
f2459fe7 JG |
301 | .send = internal_dev_recv, |
302 | }; | |
303 | ||
850b6b3b | 304 | int ovs_is_internal_dev(const struct net_device *netdev) |
f2459fe7 JG |
305 | { |
306 | #ifdef HAVE_NET_DEVICE_OPS | |
307 | return netdev->netdev_ops == &internal_dev_netdev_ops; | |
308 | #else | |
309 | return netdev->open == internal_dev_open; | |
310 | #endif | |
311 | } | |
312 | ||
850b6b3b | 313 | struct vport *ovs_internal_dev_get_vport(struct net_device *netdev) |
f2459fe7 | 314 | { |
850b6b3b | 315 | if (!ovs_is_internal_dev(netdev)) |
17a07f9f | 316 | return NULL; |
7237e4f4 | 317 | |
c052da84 | 318 | return internal_dev_priv(netdev)->vport; |
f2459fe7 | 319 | } |