9354d45203
This patch allows reliable identification of netdevice interfaces connected to openvswitch bridges. In particular, user space queries the netdev interfaces belonging to the ports for statistics, up/down state, etc. Datapath dump needs to provide enough information for the user space to be able to do that. Currently, only interface names are returned. This is not sufficient, as openvswitch allows its ports to be in different name spaces and the interface name is valid only in its name space. What is needed and generally used in other netlink APIs, is the pair ifindex+netnsid. The solution is addition of the ifindex+netnsid pair (or only ifindex if in the same name space) to vport get/dump operation. On request side, ideally the ifindex+netnsid pair could be used to get/set/del the corresponding vport. This is not implemented by this patch and can be added later if needed. Signed-off-by: Jiri Benc <jbenc@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
100 lines
2.6 KiB
C
100 lines
2.6 KiB
C
/*
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* Copyright (c) 2007-2012 Nicira, Inc.
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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 <net/netns/generic.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 void dp_detach_port_notify(struct vport *vport)
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{
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struct sk_buff *notify;
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struct datapath *dp;
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dp = vport->dp;
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notify = ovs_vport_cmd_build_info(vport, ovs_dp_get_net(dp),
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0, 0, 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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genl_set_err(&dp_vport_genl_family, ovs_dp_get_net(dp), 0,
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0, PTR_ERR(notify));
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return;
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}
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genlmsg_multicast_netns(&dp_vport_genl_family,
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ovs_dp_get_net(dp), notify, 0,
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0, GFP_KERNEL);
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}
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void ovs_dp_notify_wq(struct work_struct *work)
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{
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struct ovs_net *ovs_net = container_of(work, struct ovs_net, dp_notify_work);
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struct datapath *dp;
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ovs_lock();
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list_for_each_entry(dp, &ovs_net->dps, list_node) {
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int i;
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for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
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struct vport *vport;
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struct hlist_node *n;
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hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) {
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if (vport->ops->type == OVS_VPORT_TYPE_INTERNAL)
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continue;
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if (!(vport->dev->priv_flags & IFF_OVS_DATAPATH))
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dp_detach_port_notify(vport);
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}
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}
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}
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ovs_unlock();
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}
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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 ovs_net *ovs_net;
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struct net_device *dev = netdev_notifier_info_to_dev(ptr);
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struct vport *vport = NULL;
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if (!ovs_is_internal_dev(dev))
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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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if (event == NETDEV_UNREGISTER) {
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/* upper_dev_unlink and decrement promisc immediately */
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ovs_netdev_detach_dev(vport);
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/* schedule vport destroy, dev_put and genl notification */
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ovs_net = net_generic(dev_net(dev), ovs_net_id);
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queue_work(system_wq, &ovs_net->dp_notify_work);
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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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