2011-10-25 20:26:31 -06:00
|
|
|
/*
|
2012-05-03 19:55:23 -06:00
|
|
|
* Copyright (c) 2007-2012 Nicira, Inc.
|
2011-10-25 20:26:31 -06:00
|
|
|
*
|
|
|
|
* 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
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
|
|
|
|
#include <linux/if_arp.h>
|
|
|
|
#include <linux/if_bridge.h>
|
|
|
|
#include <linux/if_vlan.h>
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/llc.h>
|
|
|
|
#include <linux/rtnetlink.h>
|
|
|
|
#include <linux/skbuff.h>
|
2013-07-26 06:01:54 -06:00
|
|
|
#include <linux/openvswitch.h>
|
2015-07-29 05:52:06 -06:00
|
|
|
#include <linux/export.h>
|
2011-10-25 20:26:31 -06:00
|
|
|
|
2015-07-21 02:44:06 -06:00
|
|
|
#include <net/ip_tunnels.h>
|
|
|
|
#include <net/rtnetlink.h>
|
2011-10-25 20:26:31 -06:00
|
|
|
|
|
|
|
#include "datapath.h"
|
2015-07-21 02:44:06 -06:00
|
|
|
#include "vport.h"
|
2011-10-25 20:26:31 -06:00
|
|
|
#include "vport-internal_dev.h"
|
|
|
|
#include "vport-netdev.h"
|
|
|
|
|
2014-10-22 09:29:06 -06:00
|
|
|
static struct vport_ops ovs_netdev_vport_ops;
|
|
|
|
|
2011-10-25 20:26:31 -06:00
|
|
|
/* Must be called with rcu_read_lock. */
|
2015-08-29 18:44:07 -06:00
|
|
|
static void netdev_port_receive(struct sk_buff *skb)
|
2011-10-25 20:26:31 -06:00
|
|
|
{
|
2015-08-29 18:44:07 -06:00
|
|
|
struct vport *vport;
|
|
|
|
|
|
|
|
vport = ovs_netdev_get_vport(skb->dev);
|
2013-01-22 00:57:26 -07:00
|
|
|
if (unlikely(!vport))
|
|
|
|
goto error;
|
|
|
|
|
|
|
|
if (unlikely(skb_warn_if_lro(skb)))
|
|
|
|
goto error;
|
2011-10-25 20:26:31 -06:00
|
|
|
|
|
|
|
/* Make our own copy of the packet. Otherwise we will mangle the
|
|
|
|
* packet for anyone who came before us (e.g. tcpdump via AF_PACKET).
|
2013-02-22 04:41:26 -07:00
|
|
|
*/
|
2011-10-25 20:26:31 -06:00
|
|
|
skb = skb_share_check(skb, GFP_ATOMIC);
|
|
|
|
if (unlikely(!skb))
|
|
|
|
return;
|
|
|
|
|
|
|
|
skb_push(skb, ETH_HLEN);
|
2013-06-13 12:11:44 -06:00
|
|
|
ovs_skb_postpush_rcsum(skb, skb->data, ETH_HLEN);
|
2015-08-20 05:56:25 -06:00
|
|
|
ovs_vport_receive(vport, skb, skb_tunnel_info(skb));
|
2013-01-22 00:57:26 -07:00
|
|
|
return;
|
|
|
|
error:
|
|
|
|
kfree_skb(skb);
|
2011-10-25 20:26:31 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Called with rcu_read_lock and bottom-halves disabled. */
|
|
|
|
static rx_handler_result_t netdev_frame_hook(struct sk_buff **pskb)
|
|
|
|
{
|
|
|
|
struct sk_buff *skb = *pskb;
|
|
|
|
|
|
|
|
if (unlikely(skb->pkt_type == PACKET_LOOPBACK))
|
|
|
|
return RX_HANDLER_PASS;
|
|
|
|
|
2015-08-29 18:44:07 -06:00
|
|
|
netdev_port_receive(skb);
|
2011-10-25 20:26:31 -06:00
|
|
|
return RX_HANDLER_CONSUMED;
|
|
|
|
}
|
|
|
|
|
2014-11-06 07:58:52 -07:00
|
|
|
static struct net_device *get_dpdev(const struct datapath *dp)
|
2013-07-26 06:01:54 -06:00
|
|
|
{
|
|
|
|
struct vport *local;
|
|
|
|
|
|
|
|
local = ovs_vport_ovsl(dp, OVSP_LOCAL);
|
|
|
|
BUG_ON(!local);
|
2015-07-21 02:44:04 -06:00
|
|
|
return local->dev;
|
2013-07-26 06:01:54 -06:00
|
|
|
}
|
|
|
|
|
2015-07-29 05:52:06 -06:00
|
|
|
struct vport *ovs_netdev_link(struct vport *vport, const char *name)
|
2011-10-25 20:26:31 -06:00
|
|
|
{
|
|
|
|
int err;
|
|
|
|
|
2015-07-21 02:44:04 -06:00
|
|
|
vport->dev = dev_get_by_name(ovs_dp_get_net(vport->dp), name);
|
|
|
|
if (!vport->dev) {
|
2011-10-25 20:26:31 -06:00
|
|
|
err = -ENODEV;
|
|
|
|
goto error_free_vport;
|
|
|
|
}
|
|
|
|
|
2015-07-21 02:44:04 -06:00
|
|
|
if (vport->dev->flags & IFF_LOOPBACK ||
|
|
|
|
vport->dev->type != ARPHRD_ETHER ||
|
|
|
|
ovs_is_internal_dev(vport->dev)) {
|
2011-10-25 20:26:31 -06:00
|
|
|
err = -EINVAL;
|
|
|
|
goto error_put;
|
|
|
|
}
|
|
|
|
|
2013-04-15 14:23:03 -06:00
|
|
|
rtnl_lock();
|
2015-07-21 02:44:04 -06:00
|
|
|
err = netdev_master_upper_dev_link(vport->dev,
|
2013-07-26 06:01:54 -06:00
|
|
|
get_dpdev(vport->dp));
|
|
|
|
if (err)
|
|
|
|
goto error_unlock;
|
|
|
|
|
2015-07-21 02:44:04 -06:00
|
|
|
err = netdev_rx_handler_register(vport->dev, netdev_frame_hook,
|
2011-10-25 20:26:31 -06:00
|
|
|
vport);
|
|
|
|
if (err)
|
2013-07-26 06:01:54 -06:00
|
|
|
goto error_master_upper_dev_unlink;
|
2011-10-25 20:26:31 -06:00
|
|
|
|
2015-07-21 02:44:04 -06:00
|
|
|
dev_disable_lro(vport->dev);
|
|
|
|
dev_set_promiscuity(vport->dev, 1);
|
|
|
|
vport->dev->priv_flags |= IFF_OVS_DATAPATH;
|
2013-04-15 14:23:03 -06:00
|
|
|
rtnl_unlock();
|
2011-10-25 20:26:31 -06:00
|
|
|
|
|
|
|
return vport;
|
|
|
|
|
2013-07-26 06:01:54 -06:00
|
|
|
error_master_upper_dev_unlink:
|
2015-07-21 02:44:04 -06:00
|
|
|
netdev_upper_dev_unlink(vport->dev, get_dpdev(vport->dp));
|
2013-04-15 14:23:03 -06:00
|
|
|
error_unlock:
|
|
|
|
rtnl_unlock();
|
2011-10-25 20:26:31 -06:00
|
|
|
error_put:
|
2015-07-21 02:44:04 -06:00
|
|
|
dev_put(vport->dev);
|
2011-10-25 20:26:31 -06:00
|
|
|
error_free_vport:
|
|
|
|
ovs_vport_free(vport);
|
|
|
|
return ERR_PTR(err);
|
|
|
|
}
|
2015-07-29 05:52:06 -06:00
|
|
|
EXPORT_SYMBOL_GPL(ovs_netdev_link);
|
2011-10-25 20:26:31 -06:00
|
|
|
|
2015-07-21 02:44:04 -06:00
|
|
|
static struct vport *netdev_create(const struct vport_parms *parms)
|
|
|
|
{
|
|
|
|
struct vport *vport;
|
|
|
|
|
|
|
|
vport = ovs_vport_alloc(0, &ovs_netdev_vport_ops, parms);
|
|
|
|
if (IS_ERR(vport))
|
|
|
|
return vport;
|
|
|
|
|
2015-07-29 05:52:06 -06:00
|
|
|
return ovs_netdev_link(vport, parms->name);
|
2015-07-21 02:44:04 -06:00
|
|
|
}
|
|
|
|
|
2015-08-08 00:51:33 -06:00
|
|
|
static void vport_netdev_free(struct rcu_head *rcu)
|
2012-11-28 15:01:52 -07:00
|
|
|
{
|
2015-07-21 02:44:04 -06:00
|
|
|
struct vport *vport = container_of(rcu, struct vport, rcu);
|
2012-11-28 15:01:52 -07:00
|
|
|
|
2015-07-21 02:44:06 -06:00
|
|
|
if (vport->dev)
|
|
|
|
dev_put(vport->dev);
|
2015-07-21 02:44:04 -06:00
|
|
|
ovs_vport_free(vport);
|
2012-11-28 15:01:52 -07:00
|
|
|
}
|
|
|
|
|
2013-10-15 15:54:11 -06:00
|
|
|
void ovs_netdev_detach_dev(struct vport *vport)
|
2011-10-25 20:26:31 -06:00
|
|
|
{
|
2013-10-15 15:54:11 -06:00
|
|
|
ASSERT_RTNL();
|
2015-07-21 02:44:04 -06:00
|
|
|
vport->dev->priv_flags &= ~IFF_OVS_DATAPATH;
|
|
|
|
netdev_rx_handler_unregister(vport->dev);
|
|
|
|
netdev_upper_dev_unlink(vport->dev,
|
|
|
|
netdev_master_upper_dev_get(vport->dev));
|
|
|
|
dev_set_promiscuity(vport->dev, -1);
|
2013-10-15 15:54:11 -06:00
|
|
|
}
|
2015-07-29 05:52:06 -06:00
|
|
|
EXPORT_SYMBOL_GPL(ovs_netdev_detach_dev);
|
2013-10-15 15:54:11 -06:00
|
|
|
|
|
|
|
static void netdev_destroy(struct vport *vport)
|
|
|
|
{
|
|
|
|
rtnl_lock();
|
2015-07-21 02:44:04 -06:00
|
|
|
if (vport->dev->priv_flags & IFF_OVS_DATAPATH)
|
2013-10-15 15:54:11 -06:00
|
|
|
ovs_netdev_detach_dev(vport);
|
2013-04-15 14:23:03 -06:00
|
|
|
rtnl_unlock();
|
2011-10-25 20:26:31 -06:00
|
|
|
|
2015-08-08 00:51:33 -06:00
|
|
|
call_rcu(&vport->rcu, vport_netdev_free);
|
2011-10-25 20:26:31 -06:00
|
|
|
}
|
|
|
|
|
2015-08-08 00:51:33 -06:00
|
|
|
void ovs_netdev_tunnel_destroy(struct vport *vport)
|
|
|
|
{
|
|
|
|
rtnl_lock();
|
|
|
|
if (vport->dev->priv_flags & IFF_OVS_DATAPATH)
|
|
|
|
ovs_netdev_detach_dev(vport);
|
|
|
|
|
|
|
|
/* Early release so we can unregister the device */
|
|
|
|
dev_put(vport->dev);
|
|
|
|
rtnl_delete_link(vport->dev);
|
|
|
|
vport->dev = NULL;
|
|
|
|
rtnl_unlock();
|
|
|
|
|
|
|
|
call_rcu(&vport->rcu, vport_netdev_free);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(ovs_netdev_tunnel_destroy);
|
|
|
|
|
2012-04-14 23:58:06 -06:00
|
|
|
static unsigned int packet_length(const struct sk_buff *skb)
|
2011-10-25 20:26:31 -06:00
|
|
|
{
|
2012-04-14 23:58:06 -06:00
|
|
|
unsigned int length = skb->len - ETH_HLEN;
|
2011-10-25 20:26:31 -06:00
|
|
|
|
|
|
|
if (skb->protocol == htons(ETH_P_8021Q))
|
|
|
|
length -= VLAN_HLEN;
|
|
|
|
|
|
|
|
return length;
|
|
|
|
}
|
|
|
|
|
2015-08-29 18:44:07 -06:00
|
|
|
void ovs_netdev_send(struct vport *vport, struct sk_buff *skb)
|
2011-10-25 20:26:31 -06:00
|
|
|
{
|
2015-07-21 02:44:04 -06:00
|
|
|
int mtu = vport->dev->mtu;
|
2011-10-25 20:26:31 -06:00
|
|
|
|
|
|
|
if (unlikely(packet_length(skb) > mtu && !skb_is_gso(skb))) {
|
2012-05-13 15:56:26 -06:00
|
|
|
net_warn_ratelimited("%s: dropped over-mtu packet: %d > %d\n",
|
2015-07-21 02:44:04 -06:00
|
|
|
vport->dev->name,
|
2012-05-13 15:56:26 -06:00
|
|
|
packet_length(skb), mtu);
|
2015-08-29 18:44:07 -06:00
|
|
|
vport->dev->stats.tx_errors++;
|
2013-05-13 09:22:34 -06:00
|
|
|
goto drop;
|
2011-10-25 20:26:31 -06:00
|
|
|
}
|
|
|
|
|
2015-07-21 02:44:04 -06:00
|
|
|
skb->dev = vport->dev;
|
2011-10-25 20:26:31 -06:00
|
|
|
dev_queue_xmit(skb);
|
2015-08-29 18:44:07 -06:00
|
|
|
return;
|
2011-10-25 20:26:31 -06:00
|
|
|
|
2013-05-13 09:22:34 -06:00
|
|
|
drop:
|
2011-10-25 20:26:31 -06:00
|
|
|
kfree_skb(skb);
|
|
|
|
}
|
2015-07-29 05:52:06 -06:00
|
|
|
EXPORT_SYMBOL_GPL(ovs_netdev_send);
|
2011-10-25 20:26:31 -06:00
|
|
|
|
|
|
|
/* Returns null if this device is not attached to a datapath. */
|
|
|
|
struct vport *ovs_netdev_get_vport(struct net_device *dev)
|
|
|
|
{
|
|
|
|
if (likely(dev->priv_flags & IFF_OVS_DATAPATH))
|
|
|
|
return (struct vport *)
|
|
|
|
rcu_dereference_rtnl(dev->rx_handler_data);
|
|
|
|
else
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2014-10-22 09:29:06 -06:00
|
|
|
static struct vport_ops ovs_netdev_vport_ops = {
|
2011-10-25 20:26:31 -06:00
|
|
|
.type = OVS_VPORT_TYPE_NETDEV,
|
|
|
|
.create = netdev_create,
|
|
|
|
.destroy = netdev_destroy,
|
2015-07-29 05:52:06 -06:00
|
|
|
.send = ovs_netdev_send,
|
2011-10-25 20:26:31 -06:00
|
|
|
};
|
2014-10-22 09:29:06 -06:00
|
|
|
|
|
|
|
int __init ovs_netdev_init(void)
|
|
|
|
{
|
2015-07-29 05:52:06 -06:00
|
|
|
return ovs_vport_ops_register(&ovs_netdev_vport_ops);
|
2014-10-22 09:29:06 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
void ovs_netdev_exit(void)
|
|
|
|
{
|
|
|
|
ovs_vport_ops_unregister(&ovs_netdev_vport_ops);
|
|
|
|
}
|