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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 | ||
9 | #include <linux/kernel.h> | |
10 | #include <linux/netdevice.h> | |
11 | #include <linux/etherdevice.h> | |
12 | #include <linux/ethtool.h> | |
f2459fe7 | 13 | #include <linux/skbuff.h> |
a5b7d883 | 14 | #include <linux/version.h> |
f2459fe7 | 15 | |
dd8d6b8c | 16 | #include "checksum.h" |
f2459fe7 | 17 | #include "datapath.h" |
b19e8815 | 18 | #include "vport-generic.h" |
f2459fe7 JG |
19 | #include "vport-internal_dev.h" |
20 | #include "vport-netdev.h" | |
21 | ||
f2459fe7 | 22 | struct internal_dev { |
7237e4f4 | 23 | struct vport *vport; |
f2459fe7 | 24 | struct net_device_stats stats; |
f2459fe7 JG |
25 | }; |
26 | ||
f2459fe7 JG |
27 | static inline struct internal_dev *internal_dev_priv(struct net_device *netdev) |
28 | { | |
29 | return netdev_priv(netdev); | |
30 | } | |
31 | ||
4ea115b6 JG |
32 | /* This function is only called by the kernel network layer. It is not a vport |
33 | * get_stats() function. If a vport get_stats() function is defined that | |
34 | * results in this being called it will cause infinite recursion. */ | |
35 | static struct net_device_stats *internal_dev_sys_stats(struct net_device *netdev) | |
f2459fe7 | 36 | { |
4ea115b6 JG |
37 | struct vport *vport = internal_dev_get_vport(netdev); |
38 | struct net_device_stats *stats = &internal_dev_priv(netdev)->stats; | |
39 | ||
40 | if (vport) { | |
ec61a01c | 41 | struct rtnl_link_stats64 vport_stats; |
4ea115b6 JG |
42 | |
43 | vport_get_stats(vport, &vport_stats); | |
44 | ||
45 | /* The tx and rx stats need to be swapped because the switch | |
46 | * and host OS have opposite perspectives. */ | |
47 | stats->rx_packets = vport_stats.tx_packets; | |
48 | stats->tx_packets = vport_stats.rx_packets; | |
49 | stats->rx_bytes = vport_stats.tx_bytes; | |
50 | stats->tx_bytes = vport_stats.rx_bytes; | |
51 | stats->rx_errors = vport_stats.tx_errors; | |
52 | stats->tx_errors = vport_stats.rx_errors; | |
53 | stats->rx_dropped = vport_stats.tx_dropped; | |
54 | stats->tx_dropped = vport_stats.rx_dropped; | |
55 | stats->collisions = vport_stats.collisions; | |
f2459fe7 | 56 | } |
4ea115b6 | 57 | |
f2459fe7 JG |
58 | return stats; |
59 | } | |
60 | ||
61 | static int internal_dev_mac_addr(struct net_device *dev, void *p) | |
62 | { | |
63 | struct sockaddr *addr = p; | |
64 | ||
65 | if (!is_valid_ether_addr(addr->sa_data)) | |
66 | return -EADDRNOTAVAIL; | |
67 | memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); | |
68 | return 0; | |
69 | } | |
70 | ||
1c075d0a | 71 | /* Called with rcu_read_lock and bottom-halves disabled. */ |
f2459fe7 JG |
72 | static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev) |
73 | { | |
f4267e34 | 74 | compute_ip_summed(skb, true); |
3976f6d5 | 75 | OVS_CB(skb)->flow = NULL; |
f4267e34 | 76 | |
c052da84 | 77 | vport_receive(internal_dev_priv(netdev)->vport, skb); |
f2459fe7 JG |
78 | return 0; |
79 | } | |
80 | ||
81 | static int internal_dev_open(struct net_device *netdev) | |
82 | { | |
83 | netif_start_queue(netdev); | |
84 | return 0; | |
85 | } | |
86 | ||
87 | static int internal_dev_stop(struct net_device *netdev) | |
88 | { | |
89 | netif_stop_queue(netdev); | |
90 | return 0; | |
91 | } | |
92 | ||
93 | static void internal_dev_getinfo(struct net_device *netdev, | |
94 | struct ethtool_drvinfo *info) | |
95 | { | |
f2459fe7 | 96 | strcpy(info->driver, "openvswitch"); |
f2459fe7 JG |
97 | } |
98 | ||
b279fccf | 99 | static const struct ethtool_ops internal_dev_ethtool_ops = { |
f4267e34 JG |
100 | .get_drvinfo = internal_dev_getinfo, |
101 | .get_link = ethtool_op_get_link, | |
102 | .get_sg = ethtool_op_get_sg, | |
103 | .set_sg = ethtool_op_set_sg, | |
104 | .get_tx_csum = ethtool_op_get_tx_csum, | |
105 | .set_tx_csum = ethtool_op_set_tx_hw_csum, | |
106 | .get_tso = ethtool_op_get_tso, | |
107 | .set_tso = ethtool_op_set_tso, | |
f2459fe7 JG |
108 | }; |
109 | ||
110 | static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu) | |
111 | { | |
63db6ec3 | 112 | struct vport *vport = internal_dev_get_vport(netdev); |
f2459fe7 JG |
113 | |
114 | if (new_mtu < 68) | |
115 | return -EINVAL; | |
116 | ||
7237e4f4 | 117 | if (new_mtu > dp_min_mtu(vport->dp)) |
e779d8d9 | 118 | return -EINVAL; |
f2459fe7 JG |
119 | |
120 | netdev->mtu = new_mtu; | |
121 | return 0; | |
122 | } | |
123 | ||
f2459fe7 JG |
124 | static int internal_dev_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
125 | { | |
126 | if (dp_ioctl_hook) | |
127 | return dp_ioctl_hook(dev, ifr, cmd); | |
4ea115b6 | 128 | |
f2459fe7 JG |
129 | return -EOPNOTSUPP; |
130 | } | |
131 | ||
132 | #ifdef HAVE_NET_DEVICE_OPS | |
133 | static const struct net_device_ops internal_dev_netdev_ops = { | |
f2459fe7 JG |
134 | .ndo_open = internal_dev_open, |
135 | .ndo_stop = internal_dev_stop, | |
136 | .ndo_start_xmit = internal_dev_xmit, | |
137 | .ndo_set_mac_address = internal_dev_mac_addr, | |
138 | .ndo_do_ioctl = internal_dev_do_ioctl, | |
139 | .ndo_change_mtu = internal_dev_change_mtu, | |
4ea115b6 | 140 | .ndo_get_stats = internal_dev_sys_stats, |
f2459fe7 JG |
141 | }; |
142 | #endif | |
143 | ||
fceb2a5b | 144 | static void do_setup(struct net_device *netdev) |
f2459fe7 JG |
145 | { |
146 | ether_setup(netdev); | |
147 | ||
148 | #ifdef HAVE_NET_DEVICE_OPS | |
149 | netdev->netdev_ops = &internal_dev_netdev_ops; | |
150 | #else | |
151 | netdev->do_ioctl = internal_dev_do_ioctl; | |
4ea115b6 | 152 | netdev->get_stats = internal_dev_sys_stats; |
f2459fe7 JG |
153 | netdev->hard_start_xmit = internal_dev_xmit; |
154 | netdev->open = internal_dev_open; | |
155 | netdev->stop = internal_dev_stop; | |
156 | netdev->set_mac_address = internal_dev_mac_addr; | |
157 | netdev->change_mtu = internal_dev_change_mtu; | |
f2459fe7 JG |
158 | #endif |
159 | ||
5cc6f314 | 160 | netdev->destructor = free_netdev; |
f2459fe7 JG |
161 | SET_ETHTOOL_OPS(netdev, &internal_dev_ethtool_ops); |
162 | netdev->tx_queue_len = 0; | |
163 | ||
164 | netdev->flags = IFF_BROADCAST | IFF_MULTICAST; | |
8e6c8ff5 JG |
165 | netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST | |
166 | NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_TSO; | |
f2459fe7 | 167 | |
b19e8815 | 168 | vport_gen_rand_ether_addr(netdev->dev_addr); |
f2459fe7 JG |
169 | } |
170 | ||
94903c98 | 171 | static struct vport *internal_dev_create(const struct vport_parms *parms) |
f2459fe7 JG |
172 | { |
173 | struct vport *vport; | |
174 | struct netdev_vport *netdev_vport; | |
175 | struct internal_dev *internal_dev; | |
176 | int err; | |
177 | ||
e779d8d9 | 178 | vport = vport_alloc(sizeof(struct netdev_vport), &internal_vport_ops, parms); |
f2459fe7 JG |
179 | if (IS_ERR(vport)) { |
180 | err = PTR_ERR(vport); | |
181 | goto error; | |
182 | } | |
183 | ||
184 | netdev_vport = netdev_vport_priv(vport); | |
185 | ||
94903c98 | 186 | netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev), parms->name, do_setup); |
f2459fe7 JG |
187 | if (!netdev_vport->dev) { |
188 | err = -ENOMEM; | |
189 | goto error_free_vport; | |
190 | } | |
191 | ||
192 | internal_dev = internal_dev_priv(netdev_vport->dev); | |
c052da84 | 193 | internal_dev->vport = vport; |
f2459fe7 JG |
194 | |
195 | err = register_netdevice(netdev_vport->dev); | |
196 | if (err) | |
197 | goto error_free_netdev; | |
198 | ||
7237e4f4 BP |
199 | dev_set_promiscuity(netdev_vport->dev, 1); |
200 | netif_start_queue(netdev_vport->dev); | |
201 | ||
f2459fe7 JG |
202 | return vport; |
203 | ||
204 | error_free_netdev: | |
205 | free_netdev(netdev_vport->dev); | |
206 | error_free_vport: | |
207 | vport_free(vport); | |
208 | error: | |
209 | return ERR_PTR(err); | |
210 | } | |
211 | ||
fceb2a5b | 212 | static int internal_dev_destroy(struct vport *vport) |
f2459fe7 JG |
213 | { |
214 | struct netdev_vport *netdev_vport = netdev_vport_priv(vport); | |
215 | ||
63db6ec3 | 216 | netif_stop_queue(netdev_vport->dev); |
f2459fe7 | 217 | dev_set_promiscuity(netdev_vport->dev, -1); |
7237e4f4 | 218 | |
7237e4f4 | 219 | unregister_netdevice(netdev_vport->dev); |
057dd6d2 | 220 | /* unregister_netdevice() waits for an RCU grace period. */ |
7237e4f4 | 221 | vport_free(vport); |
f2459fe7 JG |
222 | |
223 | return 0; | |
224 | } | |
225 | ||
fceb2a5b | 226 | static int internal_dev_recv(struct vport *vport, struct sk_buff *skb) |
f2459fe7 JG |
227 | { |
228 | struct net_device *netdev = netdev_vport_priv(vport)->dev; | |
f2459fe7 JG |
229 | int len; |
230 | ||
231 | skb->dev = netdev; | |
232 | len = skb->len; | |
233 | skb->pkt_type = PACKET_HOST; | |
234 | skb->protocol = eth_type_trans(skb, netdev); | |
235 | ||
236 | if (in_interrupt()) | |
237 | netif_rx(skb); | |
238 | else | |
239 | netif_rx_ni(skb); | |
a5b7d883 JG |
240 | |
241 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,29) | |
f2459fe7 | 242 | netdev->last_rx = jiffies; |
a5b7d883 | 243 | #endif |
f2459fe7 | 244 | |
f2459fe7 JG |
245 | return len; |
246 | } | |
247 | ||
b279fccf | 248 | const struct vport_ops internal_vport_ops = { |
c283069c | 249 | .type = ODP_VPORT_TYPE_INTERNAL, |
3976f6d5 | 250 | .flags = VPORT_F_REQUIRED | VPORT_F_GEN_STATS | VPORT_F_FLOW, |
f2459fe7 JG |
251 | .create = internal_dev_create, |
252 | .destroy = internal_dev_destroy, | |
f2459fe7 JG |
253 | .set_mtu = netdev_set_mtu, |
254 | .set_addr = netdev_set_addr, | |
255 | .get_name = netdev_get_name, | |
256 | .get_addr = netdev_get_addr, | |
257 | .get_kobj = netdev_get_kobj, | |
f2459fe7 JG |
258 | .get_dev_flags = netdev_get_dev_flags, |
259 | .is_running = netdev_is_running, | |
260 | .get_operstate = netdev_get_operstate, | |
261 | .get_ifindex = netdev_get_ifindex, | |
262 | .get_iflink = netdev_get_iflink, | |
263 | .get_mtu = netdev_get_mtu, | |
264 | .send = internal_dev_recv, | |
265 | }; | |
266 | ||
267 | int is_internal_dev(const struct net_device *netdev) | |
268 | { | |
269 | #ifdef HAVE_NET_DEVICE_OPS | |
270 | return netdev->netdev_ops == &internal_dev_netdev_ops; | |
271 | #else | |
272 | return netdev->open == internal_dev_open; | |
273 | #endif | |
274 | } | |
275 | ||
fceb2a5b | 276 | int is_internal_vport(const struct vport *vport) |
f2459fe7 JG |
277 | { |
278 | return vport->ops == &internal_vport_ops; | |
279 | } | |
280 | ||
fceb2a5b | 281 | struct vport *internal_dev_get_vport(struct net_device *netdev) |
f2459fe7 | 282 | { |
17a07f9f JG |
283 | if (!is_internal_dev(netdev)) |
284 | return NULL; | |
7237e4f4 | 285 | |
c052da84 | 286 | return internal_dev_priv(netdev)->vport; |
f2459fe7 | 287 | } |