diff options
Diffstat (limited to 'net/openvswitch/vport-internal_dev.c')
| -rw-r--r-- | net/openvswitch/vport-internal_dev.c | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/net/openvswitch/vport-internal_dev.c b/net/openvswitch/vport-internal_dev.c new file mode 100644 index 00000000000..8fc28b86f2b --- /dev/null +++ b/net/openvswitch/vport-internal_dev.c @@ -0,0 +1,241 @@ +/* + * Copyright (c) 2007-2011 Nicira Networks. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA + */ + +#include <linux/hardirq.h> +#include <linux/if_vlan.h> +#include <linux/kernel.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/ethtool.h> +#include <linux/skbuff.h> +#include <linux/version.h> + +#include "datapath.h" +#include "vport-internal_dev.h" +#include "vport-netdev.h" + +struct internal_dev { + struct vport *vport; +}; + +static struct internal_dev *internal_dev_priv(struct net_device *netdev) +{ + return netdev_priv(netdev); +} + +/* This function is only called by the kernel network layer.*/ +static struct rtnl_link_stats64 *internal_dev_get_stats(struct net_device *netdev, + struct rtnl_link_stats64 *stats) +{ + struct vport *vport = ovs_internal_dev_get_vport(netdev); + struct ovs_vport_stats vport_stats; + + ovs_vport_get_stats(vport, &vport_stats); + + /* The tx and rx stats need to be swapped because the + * switch and host OS have opposite perspectives. */ + stats->rx_packets = vport_stats.tx_packets; + stats->tx_packets = vport_stats.rx_packets; + stats->rx_bytes = vport_stats.tx_bytes; + stats->tx_bytes = vport_stats.rx_bytes; + stats->rx_errors = vport_stats.tx_errors; + stats->tx_errors = vport_stats.rx_errors; + stats->rx_dropped = vport_stats.tx_dropped; + stats->tx_dropped = vport_stats.rx_dropped; + + return stats; +} + +static int internal_dev_mac_addr(struct net_device *dev, void *p) +{ + struct sockaddr *addr = p; + + if (!is_valid_ether_addr(addr->sa_data)) + return -EADDRNOTAVAIL; + memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); + return 0; +} + +/* Called with rcu_read_lock_bh. */ +static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev) +{ + rcu_read_lock(); + ovs_vport_receive(internal_dev_priv(netdev)->vport, skb); + rcu_read_unlock(); + return 0; +} + +static int internal_dev_open(struct net_device *netdev) +{ + netif_start_queue(netdev); + return 0; +} + +static int internal_dev_stop(struct net_device *netdev) +{ + netif_stop_queue(netdev); + return 0; +} + +static void internal_dev_getinfo(struct net_device *netdev, + struct ethtool_drvinfo *info) +{ + strcpy(info->driver, "openvswitch"); +} + +static const struct ethtool_ops internal_dev_ethtool_ops = { + .get_drvinfo = internal_dev_getinfo, + .get_link = ethtool_op_get_link, +}; + +static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu) +{ + if (new_mtu < 68) + return -EINVAL; + + netdev->mtu = new_mtu; + return 0; +} + +static void internal_dev_destructor(struct net_device *dev) +{ + struct vport *vport = ovs_internal_dev_get_vport(dev); + + ovs_vport_free(vport); + free_netdev(dev); +} + +static const struct net_device_ops internal_dev_netdev_ops = { + .ndo_open = internal_dev_open, + .ndo_stop = internal_dev_stop, + .ndo_start_xmit = internal_dev_xmit, + .ndo_set_mac_address = internal_dev_mac_addr, + .ndo_change_mtu = internal_dev_change_mtu, + .ndo_get_stats64 = internal_dev_get_stats, +}; + +static void do_setup(struct net_device *netdev) +{ + ether_setup(netdev); + + netdev->netdev_ops = &internal_dev_netdev_ops; + + netdev->priv_flags &= ~IFF_TX_SKB_SHARING; + netdev->destructor = internal_dev_destructor; + SET_ETHTOOL_OPS(netdev, &internal_dev_ethtool_ops); + netdev->tx_queue_len = 0; + + netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST | + NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_TSO; + + netdev->vlan_features = netdev->features; + netdev->features |= NETIF_F_HW_VLAN_TX; + netdev->hw_features = netdev->features & ~NETIF_F_LLTX; + random_ether_addr(netdev->dev_addr); +} + +static struct vport *internal_dev_create(const struct vport_parms *parms) +{ + struct vport *vport; + struct netdev_vport *netdev_vport; + struct internal_dev *internal_dev; + int err; + + vport = ovs_vport_alloc(sizeof(struct netdev_vport), + &ovs_internal_vport_ops, parms); + if (IS_ERR(vport)) { + err = PTR_ERR(vport); + goto error; + } + + netdev_vport = netdev_vport_priv(vport); + + netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev), + parms->name, do_setup); + if (!netdev_vport->dev) { + err = -ENOMEM; + goto error_free_vport; + } + + internal_dev = internal_dev_priv(netdev_vport->dev); + internal_dev->vport = vport; + + err = register_netdevice(netdev_vport->dev); + if (err) + goto error_free_netdev; + + dev_set_promiscuity(netdev_vport->dev, 1); + netif_start_queue(netdev_vport->dev); + + return vport; + +error_free_netdev: + free_netdev(netdev_vport->dev); +error_free_vport: + ovs_vport_free(vport); +error: + return ERR_PTR(err); +} + +static void internal_dev_destroy(struct vport *vport) +{ + struct netdev_vport *netdev_vport = netdev_vport_priv(vport); + + netif_stop_queue(netdev_vport->dev); + dev_set_promiscuity(netdev_vport->dev, -1); + + /* unregister_netdevice() waits for an RCU grace period. */ + unregister_netdevice(netdev_vport->dev); +} + +static int internal_dev_recv(struct vport *vport, struct sk_buff *skb) +{ + struct net_device *netdev = netdev_vport_priv(vport)->dev; + int len; + + len = skb->len; + skb->dev = netdev; + skb->pkt_type = PACKET_HOST; + skb->protocol = eth_type_trans(skb, netdev); + + netif_rx(skb); + + return len; +} + +const struct vport_ops ovs_internal_vport_ops = { + .type = OVS_VPORT_TYPE_INTERNAL, + .create = internal_dev_create, + .destroy = internal_dev_destroy, + .get_name = ovs_netdev_get_name, + .get_ifindex = ovs_netdev_get_ifindex, + .send = internal_dev_recv, +}; + +int ovs_is_internal_dev(const struct net_device *netdev) +{ + return netdev->netdev_ops == &internal_dev_netdev_ops; +} + +struct vport *ovs_internal_dev_get_vport(struct net_device *netdev) +{ + if (!ovs_is_internal_dev(netdev)) + return NULL; + + return internal_dev_priv(netdev)->vport; +} |