#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/rcupdate.h>
+#include <linux/skbuff.h>
+#include <linux/workqueue.h>
+#include <linux/dmi.h>
#include "datapath.h"
#include "forward.h"
-static int dp_dev_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+struct dp_dev {
+ struct net_device_stats stats;
+ struct datapath *dp;
+ struct sk_buff_head xmit_queue;
+ struct work_struct xmit_work;
+};
+
+
+static struct dp_dev *dp_dev_priv(struct net_device *netdev)
{
- printk("xxx_do_ioctl called\n");
- return 0;
+ return netdev_priv(netdev);
+}
+
+static struct net_device_stats *dp_dev_get_stats(struct net_device *netdev)
+{
+ struct dp_dev *dp_dev = dp_dev_priv(netdev);
+ return &dp_dev->stats;
}
-static struct net_device_stats *dp_dev_get_stats(struct net_device *dev)
+int dp_dev_recv(struct net_device *netdev, struct sk_buff *skb)
{
- struct datapath *dp = netdev_priv(dev);
- return &dp->stats;
+ int len = skb->len;
+ struct dp_dev *dp_dev = dp_dev_priv(netdev);
+ skb->dev = netdev;
+ skb->pkt_type = PACKET_HOST;
+ skb->protocol = eth_type_trans(skb, netdev);
+ if (in_interrupt())
+ netif_rx(skb);
+ else
+ netif_rx_ni(skb);
+ netdev->last_rx = jiffies;
+ dp_dev->stats.rx_packets++;
+ dp_dev->stats.rx_bytes += len;
+ return len;
}
-int dp_dev_xmit(struct sk_buff *skb, struct net_device *dev)
+static int dp_dev_mac_addr(struct net_device *dev, void *p)
{
- struct datapath *dp = netdev_priv(dev);
+ struct sockaddr *addr = p;
- printk("xxx dp_dev_xmit not implemented yet!\n");
+ if (netif_running(dev))
+ return -EBUSY;
+ if (!is_valid_ether_addr(addr->sa_data))
+ return -EADDRNOTAVAIL;
+ memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
return 0;
+}
- printk("xxx_xmit called send to dp_frame_hook\n");
+static int dp_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
+{
+ struct dp_dev *dp_dev = dp_dev_priv(netdev);
+ struct datapath *dp = dp_dev->dp;
+
+ /* By orphaning 'skb' we will screw up socket accounting slightly, but
+ * the effect is limited to the device queue length. If we don't
+ * do this, then the sk_buff will be destructed eventually, but it is
+ * harder to predict when. */
+ skb_orphan(skb);
+
+ /* We are going to modify 'skb', by sticking it on &dp_dev->xmit_queue,
+ * so we need to have our own clone. (At any rate, fwd_port_input()
+ * will need its own clone, so there's no benefit to queuing any other
+ * way.) */
+ skb = skb_share_check(skb, GFP_ATOMIC);
+ if (!skb)
+ return 0;
+
+ dp_dev->stats.tx_packets++;
+ dp_dev->stats.tx_bytes += skb->len;
+
+ if (skb_queue_len(&dp_dev->xmit_queue) >= dp->netdev->tx_queue_len) {
+ /* Queue overflow. Stop transmitter. */
+ netif_stop_queue(dp->netdev);
+
+ /* We won't see all dropped packets individually, so overrun
+ * error is appropriate. */
+ dp_dev->stats.tx_fifo_errors++;
+ }
+ skb_queue_tail(&dp_dev->xmit_queue, skb);
+ dp->netdev->trans_start = jiffies;
+
+ schedule_work(&dp_dev->xmit_work);
- rcu_read_lock(); /* xxx Only for 2.4 kernels? */
- fwd_port_input(dp->chain, skb, OFPP_LOCAL);
- rcu_read_unlock(); /* xxx Only for 2.4 kernels? */
-
return 0;
}
-static int dp_dev_open(struct net_device *dev)
+static void dp_dev_do_xmit(struct work_struct *work)
{
- netif_start_queue(dev);
- return 0;
+ struct dp_dev *dp_dev = container_of(work, struct dp_dev, xmit_work);
+ struct datapath *dp = dp_dev->dp;
+ struct sk_buff *skb;
+
+ while ((skb = skb_dequeue(&dp_dev->xmit_queue)) != NULL) {
+ skb_reset_mac_header(skb);
+ rcu_read_lock();
+ fwd_port_input(dp->chain, skb, dp->local_port);
+ rcu_read_unlock();
+ }
+ netif_wake_queue(dp->netdev);
}
-static void dp_dev_set_multicast_list(struct net_device *dev)
+static int dp_dev_open(struct net_device *netdev)
{
- printk("xxx_set_multi called\n");
+ netif_start_queue(netdev);
+ return 0;
}
-static int dp_dev_stop(struct net_device *dev)
+static int dp_dev_stop(struct net_device *netdev)
{
- netif_stop_queue(dev);
+ netif_stop_queue(netdev);
return 0;
}
-int dp_dev_setup(struct net_device *dev)
+/* Check if the DMI UUID contains a Nicira mac address that should be
+ * used for this interface. The UUID is assumed to be RFC 4122
+ * compliant. */
+static void
+set_uuid_mac(struct net_device *netdev)
{
+ const char *uuid = dmi_get_system_info(DMI_PRODUCT_UUID);
+ const char *uptr = uuid + 24;
+ uint8_t mac[ETH_ALEN];
+ int i;
+
+ if (!uuid || *uuid == '\0' || strlen(uuid) != 36)
+ return;
+
+ /* We are only interested version 1 UUIDs, since the last six bytes
+ * are an IEEE 802 MAC address. */
+ if (uuid[14] != '1')
+ return;
+
+ /* Pull out the embedded MAC address. The kernel's sscanf doesn't
+ * support field widths on hex digits, so we use this hack. */
+ for (i=0; i<ETH_ALEN; i++) {
+ unsigned char d[3];
+
+ d[0] = *uptr++;
+ d[1] = *uptr++;
+ d[2] = '\0';
+
+ mac[i] = simple_strtoul(d, NULL, 16);
+ }
+
+ /* If this is a Nicira one, then use it. */
+ if (mac[0] != 0x00 || mac[1] != 0x23 || mac[2] != 0x20)
+ return;
+
+ memcpy(netdev->dev_addr, mac, ETH_ALEN);
+}
+
+static void
+do_setup(struct net_device *netdev)
+{
+ ether_setup(netdev);
+
+ netdev->get_stats = dp_dev_get_stats;
+ netdev->hard_start_xmit = dp_dev_xmit;
+ netdev->open = dp_dev_open;
+ netdev->stop = dp_dev_stop;
+ netdev->tx_queue_len = 100;
+ netdev->set_mac_address = dp_dev_mac_addr;
+
+ netdev->flags = IFF_BROADCAST | IFF_MULTICAST;
+
+ random_ether_addr(netdev->dev_addr);
+
+ /* Set the OUI to the Nicira one. */
+ netdev->dev_addr[0] = 0x00;
+ netdev->dev_addr[1] = 0x23;
+ netdev->dev_addr[2] = 0x20;
+
+ /* Set the top bits to indicate random Nicira address. */
+ netdev->dev_addr[3] |= 0xc0;
+}
+
+
+int dp_dev_setup(struct datapath *dp)
+{
+ struct dp_dev *dp_dev;
+ struct net_device *netdev;
+ char of_name[8];
int err;
- strncpy(dev->name, "of%d", IFNAMSIZ);
- err = dev_alloc_name(dev, dev->name);
- if (err < 0)
- return err;
+ snprintf(of_name, sizeof of_name, "of%d", dp->dp_idx);
+ netdev = alloc_netdev(sizeof(struct dp_dev), of_name, do_setup);
+ if (!netdev)
+ return -ENOMEM;
- dev->do_ioctl = dp_dev_do_ioctl;
- dev->get_stats = dp_dev_get_stats;
- dev->hard_start_xmit = dp_dev_xmit;
- dev->open = dp_dev_open;
- dev->set_multicast_list = dp_dev_set_multicast_list;
- dev->stop = dp_dev_stop;
- dev->tx_queue_len = 0;
- dev->set_mac_address = NULL;
+ err = register_netdev(netdev);
+ if (err) {
+ free_netdev(netdev);
+ return err;
+ }
+
+ /* For "of0", we check the DMI UUID to see if a Nicira mac address
+ * is available to use instead of the random one just generated. */
+ if (dp->dp_idx == 0)
+ set_uuid_mac(netdev);
+
+ dp_dev = dp_dev_priv(netdev);
+ dp_dev->dp = dp;
+ skb_queue_head_init(&dp_dev->xmit_queue);
+ INIT_WORK(&dp_dev->xmit_work, dp_dev_do_xmit);
+ dp->netdev = netdev;
+ return 0;
+}
- dev->flags = IFF_BROADCAST | IFF_NOARP | IFF_MULTICAST;
+void dp_dev_destroy(struct datapath *dp)
+{
+ struct dp_dev *dp_dev = dp_dev_priv(dp->netdev);
- random_ether_addr(dev->dev_addr);
+ netif_tx_disable(dp->netdev);
+ synchronize_net();
+ skb_queue_purge(&dp_dev->xmit_queue);
+ unregister_netdev(dp->netdev);
+ free_netdev(dp->netdev);
+}
- ether_setup(dev);
- return register_netdevice(dev);
+int is_dp_dev(struct net_device *netdev)
+{
+ return netdev->open == dp_dev_open;
}
git://git.onelab.eu / sliver-openvswitch.git / blobdiff