251 lines
6.2 KiB
C
251 lines
6.2 KiB
C
/*
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* Copyright (c) 2007-2012 Nicira, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA
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*/
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#include <linux/hardirq.h>
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#include <linux/if_vlan.h>
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#include <linux/kernel.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/ethtool.h>
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#include <linux/skbuff.h>
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#include <net/dst.h>
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#include <net/xfrm.h>
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#include "datapath.h"
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#include "vport-internal_dev.h"
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#include "vport-netdev.h"
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struct internal_dev {
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struct vport *vport;
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};
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static struct internal_dev *internal_dev_priv(struct net_device *netdev)
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{
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return netdev_priv(netdev);
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}
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/* This function is only called by the kernel network layer.*/
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static struct rtnl_link_stats64 *internal_dev_get_stats(struct net_device *netdev,
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struct rtnl_link_stats64 *stats)
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{
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struct vport *vport = ovs_internal_dev_get_vport(netdev);
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struct ovs_vport_stats vport_stats;
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ovs_vport_get_stats(vport, &vport_stats);
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/* The tx and rx stats need to be swapped because the
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* switch and host OS have opposite perspectives. */
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stats->rx_packets = vport_stats.tx_packets;
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stats->tx_packets = vport_stats.rx_packets;
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stats->rx_bytes = vport_stats.tx_bytes;
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stats->tx_bytes = vport_stats.rx_bytes;
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stats->rx_errors = vport_stats.tx_errors;
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stats->tx_errors = vport_stats.rx_errors;
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stats->rx_dropped = vport_stats.tx_dropped;
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stats->tx_dropped = vport_stats.rx_dropped;
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return stats;
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}
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/* Called with rcu_read_lock_bh. */
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static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
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{
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rcu_read_lock();
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ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL);
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rcu_read_unlock();
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return 0;
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}
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static int internal_dev_open(struct net_device *netdev)
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{
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netif_start_queue(netdev);
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return 0;
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}
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static int internal_dev_stop(struct net_device *netdev)
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{
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netif_stop_queue(netdev);
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return 0;
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}
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static void internal_dev_getinfo(struct net_device *netdev,
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struct ethtool_drvinfo *info)
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{
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strlcpy(info->driver, "openvswitch", sizeof(info->driver));
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}
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static const struct ethtool_ops internal_dev_ethtool_ops = {
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.get_drvinfo = internal_dev_getinfo,
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.get_link = ethtool_op_get_link,
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};
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static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu)
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{
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if (new_mtu < 68)
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return -EINVAL;
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netdev->mtu = new_mtu;
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return 0;
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}
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static void internal_dev_destructor(struct net_device *dev)
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{
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struct vport *vport = ovs_internal_dev_get_vport(dev);
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ovs_vport_free(vport);
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free_netdev(dev);
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}
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static const struct net_device_ops internal_dev_netdev_ops = {
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.ndo_open = internal_dev_open,
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.ndo_stop = internal_dev_stop,
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.ndo_start_xmit = internal_dev_xmit,
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.ndo_set_mac_address = eth_mac_addr,
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.ndo_change_mtu = internal_dev_change_mtu,
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.ndo_get_stats64 = internal_dev_get_stats,
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};
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static void do_setup(struct net_device *netdev)
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{
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ether_setup(netdev);
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netdev->netdev_ops = &internal_dev_netdev_ops;
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netdev->priv_flags &= ~IFF_TX_SKB_SHARING;
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netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
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netdev->destructor = internal_dev_destructor;
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SET_ETHTOOL_OPS(netdev, &internal_dev_ethtool_ops);
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netdev->tx_queue_len = 0;
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netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST |
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NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_TSO;
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netdev->vlan_features = netdev->features;
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netdev->features |= NETIF_F_HW_VLAN_CTAG_TX;
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netdev->hw_features = netdev->features & ~NETIF_F_LLTX;
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eth_hw_addr_random(netdev);
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}
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static struct vport *internal_dev_create(const struct vport_parms *parms)
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{
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struct vport *vport;
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struct netdev_vport *netdev_vport;
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struct internal_dev *internal_dev;
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int err;
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vport = ovs_vport_alloc(sizeof(struct netdev_vport),
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&ovs_internal_vport_ops, parms);
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if (IS_ERR(vport)) {
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err = PTR_ERR(vport);
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goto error;
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}
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netdev_vport = netdev_vport_priv(vport);
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netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev),
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parms->name, do_setup);
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if (!netdev_vport->dev) {
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err = -ENOMEM;
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goto error_free_vport;
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}
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dev_net_set(netdev_vport->dev, ovs_dp_get_net(vport->dp));
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internal_dev = internal_dev_priv(netdev_vport->dev);
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internal_dev->vport = vport;
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/* Restrict bridge port to current netns. */
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if (vport->port_no == OVSP_LOCAL)
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netdev_vport->dev->features |= NETIF_F_NETNS_LOCAL;
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rtnl_lock();
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err = register_netdevice(netdev_vport->dev);
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if (err)
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goto error_free_netdev;
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dev_set_promiscuity(netdev_vport->dev, 1);
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rtnl_unlock();
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netif_start_queue(netdev_vport->dev);
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return vport;
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error_free_netdev:
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rtnl_unlock();
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free_netdev(netdev_vport->dev);
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error_free_vport:
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ovs_vport_free(vport);
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error:
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return ERR_PTR(err);
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}
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static void internal_dev_destroy(struct vport *vport)
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{
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struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
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netif_stop_queue(netdev_vport->dev);
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rtnl_lock();
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dev_set_promiscuity(netdev_vport->dev, -1);
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/* unregister_netdevice() waits for an RCU grace period. */
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unregister_netdevice(netdev_vport->dev);
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rtnl_unlock();
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}
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static int internal_dev_recv(struct vport *vport, struct sk_buff *skb)
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{
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struct net_device *netdev = netdev_vport_priv(vport)->dev;
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int len;
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len = skb->len;
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skb_dst_drop(skb);
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nf_reset(skb);
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secpath_reset(skb);
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skb->dev = netdev;
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skb->pkt_type = PACKET_HOST;
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skb->protocol = eth_type_trans(skb, netdev);
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skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
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netif_rx(skb);
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return len;
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}
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const struct vport_ops ovs_internal_vport_ops = {
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.type = OVS_VPORT_TYPE_INTERNAL,
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.create = internal_dev_create,
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.destroy = internal_dev_destroy,
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.get_name = ovs_netdev_get_name,
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.send = internal_dev_recv,
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};
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int ovs_is_internal_dev(const struct net_device *netdev)
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{
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return netdev->netdev_ops == &internal_dev_netdev_ops;
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}
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struct vport *ovs_internal_dev_get_vport(struct net_device *netdev)
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{
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if (!ovs_is_internal_dev(netdev))
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return NULL;
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return internal_dev_priv(netdev)->vport;
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}
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