2 * Copyright (c) 2007-2011 Nicira Networks.
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.
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.
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
19 #include <linux/hardirq.h>
20 #include <linux/if_vlan.h>
21 #include <linux/kernel.h>
22 #include <linux/netdevice.h>
23 #include <linux/etherdevice.h>
24 #include <linux/ethtool.h>
25 #include <linux/skbuff.h>
26 #include <linux/version.h>
31 #include "vport-generic.h"
32 #include "vport-internal_dev.h"
33 #include "vport-netdev.h"
35 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0)
36 #define HAVE_NET_DEVICE_OPS
41 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,22)
42 struct net_device_stats stats
;
46 static struct internal_dev
*internal_dev_priv(struct net_device
*netdev
)
48 return netdev_priv(netdev
);
51 /* This function is only called by the kernel network layer.*/
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
)
57 static struct net_device_stats
*internal_dev_sys_stats(struct net_device
*netdev
)
59 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,22)
60 struct net_device_stats
*stats
= &internal_dev_priv(netdev
)->stats
;
62 struct net_device_stats
*stats
= &netdev
->stats
;
65 struct vport
*vport
= internal_dev_get_vport(netdev
);
66 struct ovs_vport_stats vport_stats
;
68 vport_get_stats(vport
, &vport_stats
);
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
;
84 static int internal_dev_mac_addr(struct net_device
*dev
, void *p
)
86 struct sockaddr
*addr
= p
;
88 if (!is_valid_ether_addr(addr
->sa_data
))
89 return -EADDRNOTAVAIL
;
90 memcpy(dev
->dev_addr
, addr
->sa_data
, dev
->addr_len
);
94 /* Called with rcu_read_lock_bh. */
95 static int internal_dev_xmit(struct sk_buff
*skb
, struct net_device
*netdev
)
97 if (unlikely(compute_ip_summed(skb
, true))) {
102 vlan_copy_skb_tci(skb
);
103 OVS_CB(skb
)->flow
= NULL
;
106 vport_receive(internal_dev_priv(netdev
)->vport
, skb
);
111 static int internal_dev_open(struct net_device
*netdev
)
113 netif_start_queue(netdev
);
117 static int internal_dev_stop(struct net_device
*netdev
)
119 netif_stop_queue(netdev
);
123 static void internal_dev_getinfo(struct net_device
*netdev
,
124 struct ethtool_drvinfo
*info
)
126 strcpy(info
->driver
, "openvswitch");
129 static const struct ethtool_ops internal_dev_ethtool_ops
= {
130 .get_drvinfo
= internal_dev_getinfo
,
131 .get_link
= ethtool_op_get_link
,
132 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39)
133 .get_sg
= ethtool_op_get_sg
,
134 .set_sg
= ethtool_op_set_sg
,
135 .get_tx_csum
= ethtool_op_get_tx_csum
,
136 .set_tx_csum
= ethtool_op_set_tx_hw_csum
,
137 .get_tso
= ethtool_op_get_tso
,
138 .set_tso
= ethtool_op_set_tso
,
142 static int internal_dev_change_mtu(struct net_device
*netdev
, int new_mtu
)
147 netdev
->mtu
= new_mtu
;
151 static int internal_dev_do_ioctl(struct net_device
*dev
,
152 struct ifreq
*ifr
, int cmd
)
155 return dp_ioctl_hook(dev
, ifr
, cmd
);
160 static void internal_dev_destructor(struct net_device
*dev
)
162 struct vport
*vport
= internal_dev_get_vport(dev
);
168 #ifdef HAVE_NET_DEVICE_OPS
169 static const struct net_device_ops internal_dev_netdev_ops
= {
170 .ndo_open
= internal_dev_open
,
171 .ndo_stop
= internal_dev_stop
,
172 .ndo_start_xmit
= internal_dev_xmit
,
173 .ndo_set_mac_address
= internal_dev_mac_addr
,
174 .ndo_do_ioctl
= internal_dev_do_ioctl
,
175 .ndo_change_mtu
= internal_dev_change_mtu
,
176 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
177 .ndo_get_stats64
= internal_dev_get_stats
,
179 .ndo_get_stats
= internal_dev_sys_stats
,
184 static void do_setup(struct net_device
*netdev
)
188 #ifdef HAVE_NET_DEVICE_OPS
189 netdev
->netdev_ops
= &internal_dev_netdev_ops
;
191 netdev
->do_ioctl
= internal_dev_do_ioctl
;
192 netdev
->get_stats
= internal_dev_sys_stats
;
193 netdev
->hard_start_xmit
= internal_dev_xmit
;
194 netdev
->open
= internal_dev_open
;
195 netdev
->stop
= internal_dev_stop
;
196 netdev
->set_mac_address
= internal_dev_mac_addr
;
197 netdev
->change_mtu
= internal_dev_change_mtu
;
200 netdev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
201 netdev
->destructor
= internal_dev_destructor
;
202 SET_ETHTOOL_OPS(netdev
, &internal_dev_ethtool_ops
);
203 netdev
->tx_queue_len
= 0;
205 netdev
->features
= NETIF_F_LLTX
| NETIF_F_SG
| NETIF_F_FRAGLIST
|
206 NETIF_F_HIGHDMA
| NETIF_F_HW_CSUM
| NETIF_F_TSO
;
208 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
209 netdev
->vlan_features
= netdev
->features
;
210 netdev
->features
|= NETIF_F_HW_VLAN_TX
;
213 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39)
214 netdev
->hw_features
= netdev
->features
& ~NETIF_F_LLTX
;
216 random_ether_addr(netdev
->dev_addr
);
219 static struct vport
*internal_dev_create(const struct vport_parms
*parms
)
222 struct netdev_vport
*netdev_vport
;
223 struct internal_dev
*internal_dev
;
226 vport
= vport_alloc(sizeof(struct netdev_vport
),
227 &internal_vport_ops
, parms
);
229 err
= PTR_ERR(vport
);
233 netdev_vport
= netdev_vport_priv(vport
);
235 netdev_vport
->dev
= alloc_netdev(sizeof(struct internal_dev
),
236 parms
->name
, do_setup
);
237 if (!netdev_vport
->dev
) {
239 goto error_free_vport
;
242 internal_dev
= internal_dev_priv(netdev_vport
->dev
);
243 internal_dev
->vport
= vport
;
245 err
= register_netdevice(netdev_vport
->dev
);
247 goto error_free_netdev
;
249 dev_set_promiscuity(netdev_vport
->dev
, 1);
250 netif_start_queue(netdev_vport
->dev
);
255 free_netdev(netdev_vport
->dev
);
262 static void internal_dev_destroy(struct vport
*vport
)
264 struct netdev_vport
*netdev_vport
= netdev_vport_priv(vport
);
266 netif_stop_queue(netdev_vport
->dev
);
267 dev_set_promiscuity(netdev_vport
->dev
, -1);
269 /* unregister_netdevice() waits for an RCU grace period. */
270 unregister_netdevice(netdev_vport
->dev
);
273 static int internal_dev_recv(struct vport
*vport
, struct sk_buff
*skb
)
275 struct net_device
*netdev
= netdev_vport_priv(vport
)->dev
;
278 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37)
279 if (unlikely(vlan_deaccel_tag(skb
)))
285 skb
->pkt_type
= PACKET_HOST
;
286 skb
->protocol
= eth_type_trans(skb
, netdev
);
287 forward_ip_summed(skb
, false);
291 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,29)
292 netdev
->last_rx
= jiffies
;
298 const struct vport_ops internal_vport_ops
= {
299 .type
= OVS_VPORT_TYPE_INTERNAL
,
300 .flags
= VPORT_F_REQUIRED
| VPORT_F_FLOW
,
301 .create
= internal_dev_create
,
302 .destroy
= internal_dev_destroy
,
303 .set_addr
= netdev_set_addr
,
304 .get_name
= netdev_get_name
,
305 .get_addr
= netdev_get_addr
,
306 .get_kobj
= netdev_get_kobj
,
307 .get_dev_flags
= netdev_get_dev_flags
,
308 .is_running
= netdev_is_running
,
309 .get_operstate
= netdev_get_operstate
,
310 .get_ifindex
= netdev_get_ifindex
,
311 .get_mtu
= netdev_get_mtu
,
312 .send
= internal_dev_recv
,
315 int is_internal_dev(const struct net_device
*netdev
)
317 #ifdef HAVE_NET_DEVICE_OPS
318 return netdev
->netdev_ops
== &internal_dev_netdev_ops
;
320 return netdev
->open
== internal_dev_open
;
324 struct vport
*internal_dev_get_vport(struct net_device
*netdev
)
326 if (!is_internal_dev(netdev
))
329 return internal_dev_priv(netdev
)->vport
;