ccb1352e76
Open vSwitch is a multilayer Ethernet switch targeted at virtualized environments. In addition to supporting a variety of features expected in a traditional hardware switch, it enables fine-grained programmatic extension and flow-based control of the network. This control is useful in a wide variety of applications but is particularly important in multi-server virtualization deployments, which are often characterized by highly dynamic endpoints and the need to maintain logical abstractions for multiple tenants. The Open vSwitch datapath provides an in-kernel fast path for packet forwarding. It is complemented by a userspace daemon, ovs-vswitchd, which is able to accept configuration from a variety of sources and translate it into packet processing rules. See http://openvswitch.org for more information and userspace utilities. Signed-off-by: Jesse Gross <jesse@nicira.com>
66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
/*
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* Copyright (c) 2007-2011 Nicira Networks.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA
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*/
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#include <linux/netdevice.h>
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#include <net/genetlink.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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static int dp_device_event(struct notifier_block *unused, unsigned long event,
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void *ptr)
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{
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struct net_device *dev = ptr;
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struct vport *vport;
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if (ovs_is_internal_dev(dev))
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vport = ovs_internal_dev_get_vport(dev);
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else
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vport = ovs_netdev_get_vport(dev);
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if (!vport)
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return NOTIFY_DONE;
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switch (event) {
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case NETDEV_UNREGISTER:
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if (!ovs_is_internal_dev(dev)) {
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struct sk_buff *notify;
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notify = ovs_vport_cmd_build_info(vport, 0, 0,
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OVS_VPORT_CMD_DEL);
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ovs_dp_detach_port(vport);
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if (IS_ERR(notify)) {
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netlink_set_err(init_net.genl_sock, 0,
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ovs_dp_vport_multicast_group.id,
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PTR_ERR(notify));
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break;
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}
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genlmsg_multicast(notify, 0, ovs_dp_vport_multicast_group.id,
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GFP_KERNEL);
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}
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break;
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}
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return NOTIFY_DONE;
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}
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struct notifier_block ovs_dp_device_notifier = {
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.notifier_call = dp_device_event
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};
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