| /* |
| * Copyright (c) 2007-2012 Nicira, Inc. |
| * |
| * 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 <net/dst.h> |
| #include <net/xfrm.h> |
| #include <net/rtnetlink.h> |
| |
| #include "datapath.h" |
| #include "vport-internal_dev.h" |
| #include "vport-netdev.h" |
| |
| struct internal_dev { |
| struct vport *vport; |
| }; |
| |
| static struct vport_ops ovs_internal_vport_ops; |
| |
| 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; |
| } |
| |
| /* 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, NULL); |
| 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) |
| { |
| strlcpy(info->driver, "openvswitch", sizeof(info->driver)); |
| } |
| |
| 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 = eth_mac_addr, |
| .ndo_change_mtu = internal_dev_change_mtu, |
| .ndo_get_stats64 = internal_dev_get_stats, |
| }; |
| |
| static struct rtnl_link_ops internal_dev_link_ops __read_mostly = { |
| .kind = "openvswitch", |
| }; |
| |
| 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->priv_flags |= IFF_LIVE_ADDR_CHANGE; |
| netdev->destructor = internal_dev_destructor; |
| netdev->ethtool_ops = &internal_dev_ethtool_ops; |
| netdev->rtnl_link_ops = &internal_dev_link_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_GSO_SOFTWARE | NETIF_F_GSO_ENCAP_ALL; |
| |
| netdev->vlan_features = netdev->features; |
| netdev->hw_enc_features = netdev->features; |
| netdev->features |= NETIF_F_HW_VLAN_CTAG_TX; |
| netdev->hw_features = netdev->features & ~NETIF_F_LLTX; |
| |
| eth_hw_addr_random(netdev); |
| } |
| |
| static struct vport *internal_dev_create(const struct vport_parms *parms) |
| { |
| struct vport *vport; |
| struct internal_dev *internal_dev; |
| int err; |
| |
| vport = ovs_vport_alloc(0, &ovs_internal_vport_ops, parms); |
| if (IS_ERR(vport)) { |
| err = PTR_ERR(vport); |
| goto error; |
| } |
| |
| vport->dev = alloc_netdev(sizeof(struct internal_dev), |
| parms->name, NET_NAME_UNKNOWN, do_setup); |
| if (!vport->dev) { |
| err = -ENOMEM; |
| goto error_free_vport; |
| } |
| |
| dev_net_set(vport->dev, ovs_dp_get_net(vport->dp)); |
| internal_dev = internal_dev_priv(vport->dev); |
| internal_dev->vport = vport; |
| |
| /* Restrict bridge port to current netns. */ |
| if (vport->port_no == OVSP_LOCAL) |
| vport->dev->features |= NETIF_F_NETNS_LOCAL; |
| |
| rtnl_lock(); |
| err = register_netdevice(vport->dev); |
| if (err) |
| goto error_free_netdev; |
| |
| dev_set_promiscuity(vport->dev, 1); |
| rtnl_unlock(); |
| netif_start_queue(vport->dev); |
| |
| return vport; |
| |
| error_free_netdev: |
| rtnl_unlock(); |
| free_netdev(vport->dev); |
| error_free_vport: |
| ovs_vport_free(vport); |
| error: |
| return ERR_PTR(err); |
| } |
| |
| static void internal_dev_destroy(struct vport *vport) |
| { |
| netif_stop_queue(vport->dev); |
| rtnl_lock(); |
| dev_set_promiscuity(vport->dev, -1); |
| |
| /* unregister_netdevice() waits for an RCU grace period. */ |
| unregister_netdevice(vport->dev); |
| |
| rtnl_unlock(); |
| } |
| |
| static int internal_dev_recv(struct vport *vport, struct sk_buff *skb) |
| { |
| struct net_device *netdev = vport->dev; |
| int len; |
| |
| if (unlikely(!(netdev->flags & IFF_UP))) { |
| kfree_skb(skb); |
| return 0; |
| } |
| |
| len = skb->len; |
| |
| skb_dst_drop(skb); |
| nf_reset(skb); |
| secpath_reset(skb); |
| |
| skb->dev = netdev; |
| skb->pkt_type = PACKET_HOST; |
| skb->protocol = eth_type_trans(skb, netdev); |
| skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); |
| |
| netif_rx(skb); |
| |
| return len; |
| } |
| |
| static struct vport_ops ovs_internal_vport_ops = { |
| .type = OVS_VPORT_TYPE_INTERNAL, |
| .create = internal_dev_create, |
| .destroy = internal_dev_destroy, |
| .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; |
| } |
| |
| int ovs_internal_dev_rtnl_link_register(void) |
| { |
| int err; |
| |
| err = rtnl_link_register(&internal_dev_link_ops); |
| if (err < 0) |
| return err; |
| |
| err = ovs_vport_ops_register(&ovs_internal_vport_ops); |
| if (err < 0) |
| rtnl_link_unregister(&internal_dev_link_ops); |
| |
| return err; |
| } |
| |
| void ovs_internal_dev_rtnl_link_unregister(void) |
| { |
| ovs_vport_ops_unregister(&ovs_internal_vport_ops); |
| rtnl_link_unregister(&internal_dev_link_ops); |
| } |