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linux
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net
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openvswitch
/
vport-internal_dev.c
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249 lines (201 loc) · 6.17 KB
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linux
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openvswitch
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vport-internal_dev.c
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/* * 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 "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; dev->addr_assign_type &= ~NET_ADDR_RANDOM; 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; eth_hw_addr_random(netdev); } 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_dst_drop(skb); nf_reset(skb); secpath_reset(skb); 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; }
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