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f2459fe7 | 1 | /* |
c283069c | 2 | * Copyright (c) 2009, 2010, 2011 Nicira Networks. |
f2459fe7 JG |
3 | * Distributed under the terms of the GNU GPL version 2. |
4 | * | |
5 | * Significant portions of this file may be copied from parts of the Linux | |
6 | * kernel, by Linus Torvalds and others. | |
7 | */ | |
8 | ||
6ce39213 | 9 | #include <linux/if_vlan.h> |
f2459fe7 JG |
10 | #include <linux/kernel.h> |
11 | #include <linux/netdevice.h> | |
12 | #include <linux/etherdevice.h> | |
13 | #include <linux/ethtool.h> | |
f2459fe7 | 14 | #include <linux/skbuff.h> |
a5b7d883 | 15 | #include <linux/version.h> |
f2459fe7 | 16 | |
dd8d6b8c | 17 | #include "checksum.h" |
f2459fe7 | 18 | #include "datapath.h" |
6e0ce48e | 19 | #include "vlan.h" |
b19e8815 | 20 | #include "vport-generic.h" |
f2459fe7 JG |
21 | #include "vport-internal_dev.h" |
22 | #include "vport-netdev.h" | |
23 | ||
f2459fe7 | 24 | struct internal_dev { |
7237e4f4 | 25 | struct vport *vport; |
f2459fe7 | 26 | struct net_device_stats stats; |
f2459fe7 JG |
27 | }; |
28 | ||
f2459fe7 JG |
29 | static inline struct internal_dev *internal_dev_priv(struct net_device *netdev) |
30 | { | |
31 | return netdev_priv(netdev); | |
32 | } | |
33 | ||
4ea115b6 JG |
34 | /* This function is only called by the kernel network layer. It is not a vport |
35 | * get_stats() function. If a vport get_stats() function is defined that | |
36 | * results in this being called it will cause infinite recursion. */ | |
37 | static struct net_device_stats *internal_dev_sys_stats(struct net_device *netdev) | |
f2459fe7 | 38 | { |
4ea115b6 JG |
39 | struct vport *vport = internal_dev_get_vport(netdev); |
40 | struct net_device_stats *stats = &internal_dev_priv(netdev)->stats; | |
41 | ||
42 | if (vport) { | |
ec61a01c | 43 | struct rtnl_link_stats64 vport_stats; |
4ea115b6 JG |
44 | |
45 | vport_get_stats(vport, &vport_stats); | |
46 | ||
47 | /* The tx and rx stats need to be swapped because the switch | |
48 | * and host OS have opposite perspectives. */ | |
49 | stats->rx_packets = vport_stats.tx_packets; | |
50 | stats->tx_packets = vport_stats.rx_packets; | |
51 | stats->rx_bytes = vport_stats.tx_bytes; | |
52 | stats->tx_bytes = vport_stats.rx_bytes; | |
53 | stats->rx_errors = vport_stats.tx_errors; | |
54 | stats->tx_errors = vport_stats.rx_errors; | |
55 | stats->rx_dropped = vport_stats.tx_dropped; | |
56 | stats->tx_dropped = vport_stats.rx_dropped; | |
57 | stats->collisions = vport_stats.collisions; | |
f2459fe7 | 58 | } |
4ea115b6 | 59 | |
f2459fe7 JG |
60 | return stats; |
61 | } | |
62 | ||
63 | static int internal_dev_mac_addr(struct net_device *dev, void *p) | |
64 | { | |
65 | struct sockaddr *addr = p; | |
66 | ||
67 | if (!is_valid_ether_addr(addr->sa_data)) | |
68 | return -EADDRNOTAVAIL; | |
69 | memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); | |
70 | return 0; | |
71 | } | |
72 | ||
1c075d0a | 73 | /* Called with rcu_read_lock and bottom-halves disabled. */ |
f2459fe7 JG |
74 | static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev) |
75 | { | |
f4267e34 | 76 | compute_ip_summed(skb, true); |
6e0ce48e | 77 | vlan_copy_skb_tci(skb); |
3976f6d5 | 78 | OVS_CB(skb)->flow = NULL; |
f4267e34 | 79 | |
c052da84 | 80 | vport_receive(internal_dev_priv(netdev)->vport, skb); |
f2459fe7 JG |
81 | return 0; |
82 | } | |
83 | ||
84 | static int internal_dev_open(struct net_device *netdev) | |
85 | { | |
86 | netif_start_queue(netdev); | |
87 | return 0; | |
88 | } | |
89 | ||
90 | static int internal_dev_stop(struct net_device *netdev) | |
91 | { | |
92 | netif_stop_queue(netdev); | |
93 | return 0; | |
94 | } | |
95 | ||
96 | static void internal_dev_getinfo(struct net_device *netdev, | |
97 | struct ethtool_drvinfo *info) | |
98 | { | |
f2459fe7 | 99 | strcpy(info->driver, "openvswitch"); |
f2459fe7 JG |
100 | } |
101 | ||
b279fccf | 102 | static const struct ethtool_ops internal_dev_ethtool_ops = { |
f4267e34 JG |
103 | .get_drvinfo = internal_dev_getinfo, |
104 | .get_link = ethtool_op_get_link, | |
105 | .get_sg = ethtool_op_get_sg, | |
106 | .set_sg = ethtool_op_set_sg, | |
107 | .get_tx_csum = ethtool_op_get_tx_csum, | |
108 | .set_tx_csum = ethtool_op_set_tx_hw_csum, | |
109 | .get_tso = ethtool_op_get_tso, | |
110 | .set_tso = ethtool_op_set_tso, | |
f2459fe7 JG |
111 | }; |
112 | ||
113 | static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu) | |
114 | { | |
63db6ec3 | 115 | struct vport *vport = internal_dev_get_vport(netdev); |
f2459fe7 JG |
116 | |
117 | if (new_mtu < 68) | |
118 | return -EINVAL; | |
119 | ||
7237e4f4 | 120 | if (new_mtu > dp_min_mtu(vport->dp)) |
e779d8d9 | 121 | return -EINVAL; |
f2459fe7 JG |
122 | |
123 | netdev->mtu = new_mtu; | |
124 | return 0; | |
125 | } | |
126 | ||
f2459fe7 JG |
127 | static int internal_dev_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
128 | { | |
129 | if (dp_ioctl_hook) | |
130 | return dp_ioctl_hook(dev, ifr, cmd); | |
4ea115b6 | 131 | |
f2459fe7 JG |
132 | return -EOPNOTSUPP; |
133 | } | |
134 | ||
8338302d JG |
135 | static void internal_dev_destructor(struct net_device *dev) |
136 | { | |
137 | struct vport *vport = internal_dev_get_vport(dev); | |
138 | ||
139 | vport_free(vport); | |
140 | free_netdev(dev); | |
141 | } | |
142 | ||
f2459fe7 JG |
143 | #ifdef HAVE_NET_DEVICE_OPS |
144 | static const struct net_device_ops internal_dev_netdev_ops = { | |
f2459fe7 JG |
145 | .ndo_open = internal_dev_open, |
146 | .ndo_stop = internal_dev_stop, | |
147 | .ndo_start_xmit = internal_dev_xmit, | |
148 | .ndo_set_mac_address = internal_dev_mac_addr, | |
149 | .ndo_do_ioctl = internal_dev_do_ioctl, | |
150 | .ndo_change_mtu = internal_dev_change_mtu, | |
4ea115b6 | 151 | .ndo_get_stats = internal_dev_sys_stats, |
f2459fe7 JG |
152 | }; |
153 | #endif | |
154 | ||
fceb2a5b | 155 | static void do_setup(struct net_device *netdev) |
f2459fe7 JG |
156 | { |
157 | ether_setup(netdev); | |
158 | ||
159 | #ifdef HAVE_NET_DEVICE_OPS | |
160 | netdev->netdev_ops = &internal_dev_netdev_ops; | |
161 | #else | |
162 | netdev->do_ioctl = internal_dev_do_ioctl; | |
4ea115b6 | 163 | netdev->get_stats = internal_dev_sys_stats; |
f2459fe7 JG |
164 | netdev->hard_start_xmit = internal_dev_xmit; |
165 | netdev->open = internal_dev_open; | |
166 | netdev->stop = internal_dev_stop; | |
167 | netdev->set_mac_address = internal_dev_mac_addr; | |
168 | netdev->change_mtu = internal_dev_change_mtu; | |
f2459fe7 JG |
169 | #endif |
170 | ||
8338302d | 171 | netdev->destructor = internal_dev_destructor; |
f2459fe7 JG |
172 | SET_ETHTOOL_OPS(netdev, &internal_dev_ethtool_ops); |
173 | netdev->tx_queue_len = 0; | |
174 | ||
175 | netdev->flags = IFF_BROADCAST | IFF_MULTICAST; | |
8e6c8ff5 JG |
176 | netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST | |
177 | NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_TSO; | |
f2459fe7 | 178 | |
926ea16e JG |
179 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) |
180 | netdev->vlan_features = netdev->features; | |
181 | netdev->features |= NETIF_F_HW_VLAN_TX; | |
182 | #endif | |
183 | ||
b19e8815 | 184 | vport_gen_rand_ether_addr(netdev->dev_addr); |
f2459fe7 JG |
185 | } |
186 | ||
94903c98 | 187 | static struct vport *internal_dev_create(const struct vport_parms *parms) |
f2459fe7 JG |
188 | { |
189 | struct vport *vport; | |
190 | struct netdev_vport *netdev_vport; | |
191 | struct internal_dev *internal_dev; | |
192 | int err; | |
193 | ||
e779d8d9 | 194 | vport = vport_alloc(sizeof(struct netdev_vport), &internal_vport_ops, parms); |
f2459fe7 JG |
195 | if (IS_ERR(vport)) { |
196 | err = PTR_ERR(vport); | |
197 | goto error; | |
198 | } | |
199 | ||
200 | netdev_vport = netdev_vport_priv(vport); | |
201 | ||
94903c98 | 202 | netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev), parms->name, do_setup); |
f2459fe7 JG |
203 | if (!netdev_vport->dev) { |
204 | err = -ENOMEM; | |
205 | goto error_free_vport; | |
206 | } | |
207 | ||
208 | internal_dev = internal_dev_priv(netdev_vport->dev); | |
c052da84 | 209 | internal_dev->vport = vport; |
f2459fe7 JG |
210 | |
211 | err = register_netdevice(netdev_vport->dev); | |
212 | if (err) | |
213 | goto error_free_netdev; | |
214 | ||
7237e4f4 BP |
215 | dev_set_promiscuity(netdev_vport->dev, 1); |
216 | netif_start_queue(netdev_vport->dev); | |
217 | ||
f2459fe7 JG |
218 | return vport; |
219 | ||
220 | error_free_netdev: | |
221 | free_netdev(netdev_vport->dev); | |
222 | error_free_vport: | |
223 | vport_free(vport); | |
224 | error: | |
225 | return ERR_PTR(err); | |
226 | } | |
227 | ||
fceb2a5b | 228 | static int internal_dev_destroy(struct vport *vport) |
f2459fe7 JG |
229 | { |
230 | struct netdev_vport *netdev_vport = netdev_vport_priv(vport); | |
231 | ||
63db6ec3 | 232 | netif_stop_queue(netdev_vport->dev); |
f2459fe7 | 233 | dev_set_promiscuity(netdev_vport->dev, -1); |
7237e4f4 | 234 | |
057dd6d2 | 235 | /* unregister_netdevice() waits for an RCU grace period. */ |
8338302d | 236 | unregister_netdevice(netdev_vport->dev); |
f2459fe7 JG |
237 | |
238 | return 0; | |
239 | } | |
240 | ||
fceb2a5b | 241 | static int internal_dev_recv(struct vport *vport, struct sk_buff *skb) |
f2459fe7 JG |
242 | { |
243 | struct net_device *netdev = netdev_vport_priv(vport)->dev; | |
f2459fe7 JG |
244 | int len; |
245 | ||
6ce39213 JG |
246 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37) |
247 | if (unlikely(vlan_deaccel_tag(skb))) | |
248 | return 0; | |
249 | #endif | |
250 | ||
f2459fe7 | 251 | len = skb->len; |
6ce39213 | 252 | skb->dev = netdev; |
f2459fe7 JG |
253 | skb->pkt_type = PACKET_HOST; |
254 | skb->protocol = eth_type_trans(skb, netdev); | |
255 | ||
256 | if (in_interrupt()) | |
257 | netif_rx(skb); | |
258 | else | |
259 | netif_rx_ni(skb); | |
a5b7d883 JG |
260 | |
261 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,29) | |
f2459fe7 | 262 | netdev->last_rx = jiffies; |
a5b7d883 | 263 | #endif |
f2459fe7 | 264 | |
f2459fe7 JG |
265 | return len; |
266 | } | |
267 | ||
b279fccf | 268 | const struct vport_ops internal_vport_ops = { |
c283069c | 269 | .type = ODP_VPORT_TYPE_INTERNAL, |
3976f6d5 | 270 | .flags = VPORT_F_REQUIRED | VPORT_F_GEN_STATS | VPORT_F_FLOW, |
f2459fe7 JG |
271 | .create = internal_dev_create, |
272 | .destroy = internal_dev_destroy, | |
f2459fe7 JG |
273 | .set_mtu = netdev_set_mtu, |
274 | .set_addr = netdev_set_addr, | |
275 | .get_name = netdev_get_name, | |
276 | .get_addr = netdev_get_addr, | |
277 | .get_kobj = netdev_get_kobj, | |
f2459fe7 JG |
278 | .get_dev_flags = netdev_get_dev_flags, |
279 | .is_running = netdev_is_running, | |
280 | .get_operstate = netdev_get_operstate, | |
281 | .get_ifindex = netdev_get_ifindex, | |
282 | .get_iflink = netdev_get_iflink, | |
283 | .get_mtu = netdev_get_mtu, | |
284 | .send = internal_dev_recv, | |
285 | }; | |
286 | ||
287 | int is_internal_dev(const struct net_device *netdev) | |
288 | { | |
289 | #ifdef HAVE_NET_DEVICE_OPS | |
290 | return netdev->netdev_ops == &internal_dev_netdev_ops; | |
291 | #else | |
292 | return netdev->open == internal_dev_open; | |
293 | #endif | |
294 | } | |
295 | ||
fceb2a5b | 296 | int is_internal_vport(const struct vport *vport) |
f2459fe7 JG |
297 | { |
298 | return vport->ops == &internal_vport_ops; | |
299 | } | |
300 | ||
fceb2a5b | 301 | struct vport *internal_dev_get_vport(struct net_device *netdev) |
f2459fe7 | 302 | { |
17a07f9f JG |
303 | if (!is_internal_dev(netdev)) |
304 | return NULL; | |
7237e4f4 | 305 | |
c052da84 | 306 | return internal_dev_priv(netdev)->vport; |
f2459fe7 | 307 | } |