Justin Pettit
9da88ee2ad
This new OpenFlow message format provides a cleaner interface and greater detail and control over ports. It is now possible to see what features the switch's port is currently configured as having, what it's advertising, and what it's capable of handling. It is also possible to return the features advertised by the port's peer.
64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
/*
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* Distributed under the terms of the GNU GPL version 2.
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* Copyright (c) 2007, 2008 The Board of Trustees of The Leland
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* Stanford Junior University
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*/
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/* Handle changes to managed devices */
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#include <linux/netdevice.h>
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#include "datapath.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 net_bridge_port *p = dev->br_port;
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unsigned long int flags;
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uint32_t orig_state, orig_config;
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/* Check if monitored port */
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if (!p)
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return NOTIFY_DONE;
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spin_lock_irqsave(&p->lock, flags);
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orig_state = p->state;
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orig_config = p->config;
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switch (event) {
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case NETDEV_CHANGE:
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if (netif_carrier_ok(p->dev))
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p->state &= ~OFPPS_LINK_DOWN;
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else
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p->state |= OFPPS_LINK_DOWN;
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break;
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case NETDEV_DOWN:
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p->config |= OFPPC_PORT_DOWN;
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break;
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case NETDEV_UP:
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p->config &= ~OFPPC_PORT_DOWN;
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break;
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case NETDEV_UNREGISTER:
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spin_unlock_irqrestore(&p->lock, flags);
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dp_del_switch_port(p);
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return NOTIFY_DONE;
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break;
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}
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spin_unlock_irqrestore(&p->lock, flags);
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if ((orig_state != p->state) || (orig_config != p->config))
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dp_send_port_status(p, OFPPR_MODIFY);
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return NOTIFY_DONE;
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}
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struct notifier_block dp_device_notifier = {
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.notifier_call = dp_device_event
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};
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