2 * Copyright (c) 2009, 2010, 2011 Nicira Networks.
3 * Distributed under the terms of the GNU GPL version 2.
5 * Significant portions of this file may be copied from parts of the Linux
6 * kernel, by Linus Torvalds and others.
9 #include <linux/hardirq.h>
10 #include <linux/if_vlan.h>
11 #include <linux/kernel.h>
12 #include <linux/netdevice.h>
13 #include <linux/etherdevice.h>
14 #include <linux/ethtool.h>
15 #include <linux/skbuff.h>
16 #include <linux/version.h>
21 #include "vport-generic.h"
22 #include "vport-internal_dev.h"
23 #include "vport-netdev.h"
27 struct net_device_stats stats
;
30 static inline struct internal_dev
*internal_dev_priv(struct net_device
*netdev
)
32 return netdev_priv(netdev
);
35 /* This function is only called by the kernel network layer. It is not a vport
36 * get_stats() function. If a vport get_stats() function is defined that
37 * results in this being called it will cause infinite recursion. */
38 static struct net_device_stats
*internal_dev_sys_stats(struct net_device
*netdev
)
40 struct vport
*vport
= internal_dev_get_vport(netdev
);
41 struct net_device_stats
*stats
= &internal_dev_priv(netdev
)->stats
;
44 struct rtnl_link_stats64 vport_stats
;
46 vport_get_stats(vport
, &vport_stats
);
48 /* The tx and rx stats need to be swapped because the switch
49 * and host OS have opposite perspectives. */
50 stats
->rx_packets
= vport_stats
.tx_packets
;
51 stats
->tx_packets
= vport_stats
.rx_packets
;
52 stats
->rx_bytes
= vport_stats
.tx_bytes
;
53 stats
->tx_bytes
= vport_stats
.rx_bytes
;
54 stats
->rx_errors
= vport_stats
.tx_errors
;
55 stats
->tx_errors
= vport_stats
.rx_errors
;
56 stats
->rx_dropped
= vport_stats
.tx_dropped
;
57 stats
->tx_dropped
= vport_stats
.rx_dropped
;
58 stats
->collisions
= vport_stats
.collisions
;
64 static int internal_dev_mac_addr(struct net_device
*dev
, void *p
)
66 struct sockaddr
*addr
= p
;
68 if (!is_valid_ether_addr(addr
->sa_data
))
69 return -EADDRNOTAVAIL
;
70 memcpy(dev
->dev_addr
, addr
->sa_data
, dev
->addr_len
);
74 /* Called with rcu_read_lock and bottom-halves disabled. */
75 static int internal_dev_xmit(struct sk_buff
*skb
, struct net_device
*netdev
)
77 if (unlikely(compute_ip_summed(skb
, true))) {
82 vlan_copy_skb_tci(skb
);
83 OVS_CB(skb
)->flow
= NULL
;
85 vport_receive(internal_dev_priv(netdev
)->vport
, skb
);
89 static int internal_dev_open(struct net_device
*netdev
)
91 netif_start_queue(netdev
);
95 static int internal_dev_stop(struct net_device
*netdev
)
97 netif_stop_queue(netdev
);
101 static void internal_dev_getinfo(struct net_device
*netdev
,
102 struct ethtool_drvinfo
*info
)
104 strcpy(info
->driver
, "openvswitch");
107 static const struct ethtool_ops internal_dev_ethtool_ops
= {
108 .get_drvinfo
= internal_dev_getinfo
,
109 .get_link
= ethtool_op_get_link
,
110 .get_sg
= ethtool_op_get_sg
,
111 .set_sg
= ethtool_op_set_sg
,
112 .get_tx_csum
= ethtool_op_get_tx_csum
,
113 .set_tx_csum
= ethtool_op_set_tx_hw_csum
,
114 .get_tso
= ethtool_op_get_tso
,
115 .set_tso
= ethtool_op_set_tso
,
118 static int internal_dev_change_mtu(struct net_device
*netdev
, int new_mtu
)
123 netdev
->mtu
= new_mtu
;
127 static int internal_dev_do_ioctl(struct net_device
*dev
, struct ifreq
*ifr
, int cmd
)
130 return dp_ioctl_hook(dev
, ifr
, cmd
);
135 static void internal_dev_destructor(struct net_device
*dev
)
137 struct vport
*vport
= internal_dev_get_vport(dev
);
143 #ifdef HAVE_NET_DEVICE_OPS
144 static const struct net_device_ops internal_dev_netdev_ops
= {
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
,
151 .ndo_get_stats
= internal_dev_sys_stats
,
155 static void do_setup(struct net_device
*netdev
)
159 #ifdef HAVE_NET_DEVICE_OPS
160 netdev
->netdev_ops
= &internal_dev_netdev_ops
;
162 netdev
->do_ioctl
= internal_dev_do_ioctl
;
163 netdev
->get_stats
= internal_dev_sys_stats
;
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
;
171 netdev
->destructor
= internal_dev_destructor
;
172 SET_ETHTOOL_OPS(netdev
, &internal_dev_ethtool_ops
);
173 netdev
->tx_queue_len
= 0;
175 netdev
->flags
= IFF_BROADCAST
| IFF_MULTICAST
;
176 netdev
->features
= NETIF_F_LLTX
| NETIF_F_SG
| NETIF_F_FRAGLIST
|
177 NETIF_F_HIGHDMA
| NETIF_F_HW_CSUM
| NETIF_F_TSO
;
179 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
180 netdev
->vlan_features
= netdev
->features
;
181 netdev
->features
|= NETIF_F_HW_VLAN_TX
;
184 vport_gen_rand_ether_addr(netdev
->dev_addr
);
187 static struct vport
*internal_dev_create(const struct vport_parms
*parms
)
190 struct netdev_vport
*netdev_vport
;
191 struct internal_dev
*internal_dev
;
194 vport
= vport_alloc(sizeof(struct netdev_vport
), &internal_vport_ops
, parms
);
196 err
= PTR_ERR(vport
);
200 netdev_vport
= netdev_vport_priv(vport
);
202 netdev_vport
->dev
= alloc_netdev(sizeof(struct internal_dev
), parms
->name
, do_setup
);
203 if (!netdev_vport
->dev
) {
205 goto error_free_vport
;
208 internal_dev
= internal_dev_priv(netdev_vport
->dev
);
209 internal_dev
->vport
= vport
;
211 err
= register_netdevice(netdev_vport
->dev
);
213 goto error_free_netdev
;
215 dev_set_promiscuity(netdev_vport
->dev
, 1);
216 netif_start_queue(netdev_vport
->dev
);
221 free_netdev(netdev_vport
->dev
);
228 static void internal_dev_destroy(struct vport
*vport
)
230 struct netdev_vport
*netdev_vport
= netdev_vport_priv(vport
);
232 netif_stop_queue(netdev_vport
->dev
);
233 dev_set_promiscuity(netdev_vport
->dev
, -1);
235 /* unregister_netdevice() waits for an RCU grace period. */
236 unregister_netdevice(netdev_vport
->dev
);
239 static int internal_dev_recv(struct vport
*vport
, struct sk_buff
*skb
)
241 struct net_device
*netdev
= netdev_vport_priv(vport
)->dev
;
244 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37)
245 if (unlikely(vlan_deaccel_tag(skb
)))
251 skb
->pkt_type
= PACKET_HOST
;
252 skb
->protocol
= eth_type_trans(skb
, netdev
);
253 forward_ip_summed(skb
, false);
260 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,29)
261 netdev
->last_rx
= jiffies
;
267 const struct vport_ops internal_vport_ops
= {
268 .type
= OVS_VPORT_TYPE_INTERNAL
,
269 .flags
= VPORT_F_REQUIRED
| VPORT_F_GEN_STATS
| VPORT_F_FLOW
,
270 .create
= internal_dev_create
,
271 .destroy
= internal_dev_destroy
,
272 .set_addr
= netdev_set_addr
,
273 .get_name
= netdev_get_name
,
274 .get_addr
= netdev_get_addr
,
275 .get_kobj
= netdev_get_kobj
,
276 .get_dev_flags
= netdev_get_dev_flags
,
277 .is_running
= netdev_is_running
,
278 .get_operstate
= netdev_get_operstate
,
279 .get_ifindex
= netdev_get_ifindex
,
280 .get_mtu
= netdev_get_mtu
,
281 .send
= internal_dev_recv
,
284 int is_internal_dev(const struct net_device
*netdev
)
286 #ifdef HAVE_NET_DEVICE_OPS
287 return netdev
->netdev_ops
== &internal_dev_netdev_ops
;
289 return netdev
->open
== internal_dev_open
;
293 int is_internal_vport(const struct vport
*vport
)
295 return vport
->ops
== &internal_vport_ops
;
298 struct vport
*internal_dev_get_vport(struct net_device
*netdev
)
300 if (!is_internal_dev(netdev
))
303 return internal_dev_priv(netdev
)->vport
;