forked from Minki/linux
c942299924
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 21 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141334.228102212@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
212 lines
4.7 KiB
C
212 lines
4.7 KiB
C
// 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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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/if_arp.h>
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#include <linux/if_bridge.h>
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#include <linux/if_vlan.h>
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#include <linux/kernel.h>
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#include <linux/llc.h>
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#include <linux/rtnetlink.h>
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#include <linux/skbuff.h>
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#include <linux/openvswitch.h>
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#include <linux/export.h>
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#include <net/ip_tunnels.h>
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#include <net/rtnetlink.h>
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#include "datapath.h"
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#include "vport.h"
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#include "vport-internal_dev.h"
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#include "vport-netdev.h"
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static struct vport_ops ovs_netdev_vport_ops;
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/* Must be called with rcu_read_lock. */
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static void netdev_port_receive(struct sk_buff *skb)
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{
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struct vport *vport;
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vport = ovs_netdev_get_vport(skb->dev);
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if (unlikely(!vport))
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goto error;
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if (unlikely(skb_warn_if_lro(skb)))
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goto error;
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/* Make our own copy of the packet. Otherwise we will mangle the
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* packet for anyone who came before us (e.g. tcpdump via AF_PACKET).
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*/
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skb = skb_share_check(skb, GFP_ATOMIC);
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if (unlikely(!skb))
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return;
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if (skb->dev->type == ARPHRD_ETHER) {
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skb_push(skb, ETH_HLEN);
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skb_postpush_rcsum(skb, skb->data, ETH_HLEN);
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}
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ovs_vport_receive(vport, skb, skb_tunnel_info(skb));
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return;
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error:
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kfree_skb(skb);
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}
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/* Called with rcu_read_lock and bottom-halves disabled. */
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static rx_handler_result_t netdev_frame_hook(struct sk_buff **pskb)
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{
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struct sk_buff *skb = *pskb;
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if (unlikely(skb->pkt_type == PACKET_LOOPBACK))
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return RX_HANDLER_PASS;
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netdev_port_receive(skb);
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return RX_HANDLER_CONSUMED;
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}
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static struct net_device *get_dpdev(const struct datapath *dp)
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{
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struct vport *local;
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local = ovs_vport_ovsl(dp, OVSP_LOCAL);
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return local->dev;
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}
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struct vport *ovs_netdev_link(struct vport *vport, const char *name)
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{
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int err;
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vport->dev = dev_get_by_name(ovs_dp_get_net(vport->dp), name);
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if (!vport->dev) {
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err = -ENODEV;
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goto error_free_vport;
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}
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if (vport->dev->flags & IFF_LOOPBACK ||
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(vport->dev->type != ARPHRD_ETHER &&
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vport->dev->type != ARPHRD_NONE) ||
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ovs_is_internal_dev(vport->dev)) {
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err = -EINVAL;
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goto error_put;
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}
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rtnl_lock();
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err = netdev_master_upper_dev_link(vport->dev,
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get_dpdev(vport->dp),
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NULL, NULL, NULL);
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if (err)
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goto error_unlock;
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err = netdev_rx_handler_register(vport->dev, netdev_frame_hook,
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vport);
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if (err)
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goto error_master_upper_dev_unlink;
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dev_disable_lro(vport->dev);
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dev_set_promiscuity(vport->dev, 1);
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vport->dev->priv_flags |= IFF_OVS_DATAPATH;
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rtnl_unlock();
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return vport;
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error_master_upper_dev_unlink:
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netdev_upper_dev_unlink(vport->dev, get_dpdev(vport->dp));
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error_unlock:
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rtnl_unlock();
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error_put:
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dev_put(vport->dev);
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error_free_vport:
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ovs_vport_free(vport);
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return ERR_PTR(err);
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}
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EXPORT_SYMBOL_GPL(ovs_netdev_link);
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static struct vport *netdev_create(const struct vport_parms *parms)
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{
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struct vport *vport;
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vport = ovs_vport_alloc(0, &ovs_netdev_vport_ops, parms);
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if (IS_ERR(vport))
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return vport;
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return ovs_netdev_link(vport, parms->name);
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}
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static void vport_netdev_free(struct rcu_head *rcu)
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{
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struct vport *vport = container_of(rcu, struct vport, rcu);
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if (vport->dev)
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dev_put(vport->dev);
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ovs_vport_free(vport);
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}
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void ovs_netdev_detach_dev(struct vport *vport)
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{
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ASSERT_RTNL();
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vport->dev->priv_flags &= ~IFF_OVS_DATAPATH;
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netdev_rx_handler_unregister(vport->dev);
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netdev_upper_dev_unlink(vport->dev,
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netdev_master_upper_dev_get(vport->dev));
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dev_set_promiscuity(vport->dev, -1);
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}
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static void netdev_destroy(struct vport *vport)
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{
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rtnl_lock();
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if (vport->dev->priv_flags & IFF_OVS_DATAPATH)
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ovs_netdev_detach_dev(vport);
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rtnl_unlock();
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call_rcu(&vport->rcu, vport_netdev_free);
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}
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void ovs_netdev_tunnel_destroy(struct vport *vport)
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{
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rtnl_lock();
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if (vport->dev->priv_flags & IFF_OVS_DATAPATH)
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ovs_netdev_detach_dev(vport);
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/* We can be invoked by both explicit vport deletion and
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* underlying netdev deregistration; delete the link only
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* if it's not already shutting down.
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*/
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if (vport->dev->reg_state == NETREG_REGISTERED)
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rtnl_delete_link(vport->dev);
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dev_put(vport->dev);
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vport->dev = NULL;
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rtnl_unlock();
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call_rcu(&vport->rcu, vport_netdev_free);
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}
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EXPORT_SYMBOL_GPL(ovs_netdev_tunnel_destroy);
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/* Returns null if this device is not attached to a datapath. */
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struct vport *ovs_netdev_get_vport(struct net_device *dev)
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{
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if (likely(dev->priv_flags & IFF_OVS_DATAPATH))
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return (struct vport *)
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rcu_dereference_rtnl(dev->rx_handler_data);
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else
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return NULL;
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}
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static struct vport_ops ovs_netdev_vport_ops = {
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.type = OVS_VPORT_TYPE_NETDEV,
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.create = netdev_create,
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.destroy = netdev_destroy,
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.send = dev_queue_xmit,
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};
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int __init ovs_netdev_init(void)
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{
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return ovs_vport_ops_register(&ovs_netdev_vport_ops);
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}
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void ovs_netdev_exit(void)
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{
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ovs_vport_ops_unregister(&ovs_netdev_vport_ops);
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}
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