e9dc865340
Every user of the network device notifiers is either a protocol stack or a pseudo device. If a protocol stack that does not have support for multiple network namespaces receives an event for a device that is not in the initial network namespace it quite possibly can get confused and do the wrong thing. To avoid problems until all of the protocol stacks are converted this patch modifies all netdev event handlers to ignore events on devices that are not in the initial network namespace. As the rest of the code is made network namespace aware these checks can be removed. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
98 lines
2.3 KiB
C
98 lines
2.3 KiB
C
/*
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* Device event handling
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* Linux ethernet bridge
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*
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* Authors:
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* Lennert Buytenhek <buytenh@gnu.org>
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*
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* $Id: br_notify.c,v 1.2 2000/02/21 15:51:34 davem Exp $
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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 the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/rtnetlink.h>
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#include <net/net_namespace.h>
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#include "br_private.h"
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static int br_device_event(struct notifier_block *unused, unsigned long event, void *ptr);
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struct notifier_block br_device_notifier = {
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.notifier_call = br_device_event
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};
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/*
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* Handle changes in state of network devices enslaved to a bridge.
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*
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* Note: don't care about up/down if bridge itself is down, because
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* port state is checked when bridge is brought up.
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*/
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static int br_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
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{
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struct net_device *dev = ptr;
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struct net_bridge_port *p = dev->br_port;
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struct net_bridge *br;
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if (dev->nd_net != &init_net)
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return NOTIFY_DONE;
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/* not a port of a bridge */
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if (p == NULL)
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return NOTIFY_DONE;
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br = p->br;
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switch (event) {
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case NETDEV_CHANGEMTU:
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dev_set_mtu(br->dev, br_min_mtu(br));
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break;
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case NETDEV_CHANGEADDR:
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spin_lock_bh(&br->lock);
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br_fdb_changeaddr(p, dev->dev_addr);
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br_stp_recalculate_bridge_id(br);
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spin_unlock_bh(&br->lock);
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break;
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case NETDEV_CHANGE:
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br_port_carrier_check(p);
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break;
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case NETDEV_FEAT_CHANGE:
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spin_lock_bh(&br->lock);
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if (netif_running(br->dev))
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br_features_recompute(br);
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spin_unlock_bh(&br->lock);
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break;
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case NETDEV_DOWN:
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spin_lock_bh(&br->lock);
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if (br->dev->flags & IFF_UP)
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br_stp_disable_port(p);
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spin_unlock_bh(&br->lock);
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break;
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case NETDEV_UP:
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if (netif_carrier_ok(dev) && (br->dev->flags & IFF_UP)) {
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spin_lock_bh(&br->lock);
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br_stp_enable_port(p);
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spin_unlock_bh(&br->lock);
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}
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break;
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case NETDEV_UNREGISTER:
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br_del_if(br, dev);
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break;
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}
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/* Events that may cause spanning tree to refresh */
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if (event == NETDEV_CHANGEADDR || event == NETDEV_UP ||
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event == NETDEV_CHANGE || event == NETDEV_DOWN)
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br_ifinfo_notify(RTM_NEWLINK, p);
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return NOTIFY_DONE;
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}
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