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254 lines
5.8 KiB
254 lines
5.8 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (c) 2007-2012 Nicira, Inc. |
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*/ |
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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 <net/rtnetlink.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 vport_ops ovs_internal_vport_ops; |
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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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/* Called with rcu_read_lock_bh. */ |
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static netdev_tx_t |
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internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev) |
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{ |
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int len, err; |
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/* store len value because skb can be freed inside ovs_vport_receive() */ |
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len = skb->len; |
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rcu_read_lock(); |
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err = ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL); |
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rcu_read_unlock(); |
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if (likely(!err)) |
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dev_sw_netstats_tx_add(netdev, 1, len); |
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else |
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netdev->stats.tx_errors++; |
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return NETDEV_TX_OK; |
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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 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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} |
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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_get_stats64 = dev_get_tstats64, |
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}; |
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static struct rtnl_link_ops internal_dev_link_ops __read_mostly = { |
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.kind = "openvswitch", |
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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->max_mtu = ETH_MAX_MTU; |
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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 | IFF_OPENVSWITCH | |
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IFF_NO_QUEUE; |
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netdev->needs_free_netdev = true; |
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netdev->priv_destructor = NULL; |
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netdev->ethtool_ops = &internal_dev_ethtool_ops; |
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netdev->rtnl_link_ops = &internal_dev_link_ops; |
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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 | |
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NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ENCAP_ALL; |
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netdev->vlan_features = netdev->features; |
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netdev->hw_enc_features = netdev->features; |
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netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_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 internal_dev *internal_dev; |
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struct net_device *dev; |
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int err; |
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vport = ovs_vport_alloc(0, &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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dev = alloc_netdev(sizeof(struct internal_dev), |
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parms->name, NET_NAME_USER, do_setup); |
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vport->dev = dev; |
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if (!vport->dev) { |
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err = -ENOMEM; |
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goto error_free_vport; |
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} |
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vport->dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
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if (!vport->dev->tstats) { |
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err = -ENOMEM; |
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goto error_free_netdev; |
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} |
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dev_net_set(vport->dev, ovs_dp_get_net(vport->dp)); |
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internal_dev = internal_dev_priv(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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vport->dev->features |= NETIF_F_NETNS_LOCAL; |
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rtnl_lock(); |
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err = register_netdevice(vport->dev); |
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if (err) |
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goto error_unlock; |
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vport->dev->priv_destructor = internal_dev_destructor; |
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dev_set_promiscuity(vport->dev, 1); |
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rtnl_unlock(); |
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netif_start_queue(vport->dev); |
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return vport; |
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error_unlock: |
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rtnl_unlock(); |
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free_percpu(dev->tstats); |
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error_free_netdev: |
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free_netdev(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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netif_stop_queue(vport->dev); |
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rtnl_lock(); |
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dev_set_promiscuity(vport->dev, -1); |
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/* unregister_netdevice() waits for an RCU grace period. */ |
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unregister_netdevice(vport->dev); |
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free_percpu(vport->dev->tstats); |
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rtnl_unlock(); |
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} |
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static netdev_tx_t internal_dev_recv(struct sk_buff *skb) |
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{ |
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struct net_device *netdev = skb->dev; |
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if (unlikely(!(netdev->flags & IFF_UP))) { |
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kfree_skb(skb); |
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netdev->stats.rx_dropped++; |
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return NETDEV_TX_OK; |
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} |
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skb_dst_drop(skb); |
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nf_reset_ct(skb); |
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secpath_reset(skb); |
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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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dev_sw_netstats_rx_add(netdev, skb->len); |
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netif_rx(skb); |
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return NETDEV_TX_OK; |
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} |
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static 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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.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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int ovs_internal_dev_rtnl_link_register(void) |
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{ |
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int err; |
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err = rtnl_link_register(&internal_dev_link_ops); |
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if (err < 0) |
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return err; |
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err = ovs_vport_ops_register(&ovs_internal_vport_ops); |
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if (err < 0) |
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rtnl_link_unregister(&internal_dev_link_ops); |
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return err; |
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} |
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void ovs_internal_dev_rtnl_link_unregister(void) |
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{ |
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ovs_vport_ops_unregister(&ovs_internal_vport_ops); |
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rtnl_link_unregister(&internal_dev_link_ops); |
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}
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