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Commit 96b99684 authored by John Fastabend's avatar John Fastabend Committed by David S. Miller
Browse files

net_dcb: add application notifiers 



DCBx applications priorities can be changed dynamically. If
application stacks are expected to keep the skb priority
consistent with the dcbx priority the stack will need to
be notified when these changes occur.

This patch adds application notifiers for the stack to register
with.

Signed-off-by: default avatarJohn Fastabend <john.r.fastabend@intel.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9ab933ab

include/net/dcbevent.h

0 → 100644
+31 −0
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2010, Intel Corporation.

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms and conditions of the GNU General Public License,

 * version 2, as published by the Free Software Foundation.

 *

 * This program is distributed in the hope 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., 59 Temple

 * Place - Suite 330, Boston, MA 02111-1307 USA.

 *

 * Author: John Fastabend <john.r.fastabend@intel.com>

 */



#ifndef _DCB_EVENT_H

#define _DCB_EVENT_H



enum dcbevent_notif_type {

	DCB_APP_EVENT = 1,

};



extern int register_dcbevent_notifier(struct notifier_block *nb);

extern int unregister_dcbevent_notifier(struct notifier_block *nb);

extern int call_dcbevent_notifiers(unsigned long val, void *v);



#endif

net/dcb/Makefile

+1 −1
Original line number Diff line number Diff line 
obj-$(CONFIG_DCB) += dcbnl.o
 
obj-$(CONFIG_DCB) += dcbnl.o dcbevent.o

net/dcb/dcbevent.c

0 → 100644
+40 −0
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2010, Intel Corporation.

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms and conditions of the GNU General Public License,

 * version 2, as published by the Free Software Foundation.

 *

 * This program is distributed in the hope 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., 59 Temple

 * Place - Suite 330, Boston, MA 02111-1307 USA.

 *

 * Author: John Fastabend <john.r.fastabend@intel.com>

 */



#include <linux/rtnetlink.h>

#include <linux/notifier.h>



static ATOMIC_NOTIFIER_HEAD(dcbevent_notif_chain);



int register_dcbevent_notifier(struct notifier_block *nb)

{

	return atomic_notifier_chain_register(&dcbevent_notif_chain, nb);

}

EXPORT_SYMBOL(register_dcbevent_notifier);



int unregister_dcbevent_notifier(struct notifier_block *nb)

{

	return atomic_notifier_chain_unregister(&dcbevent_notif_chain, nb);

}

EXPORT_SYMBOL(unregister_dcbevent_notifier);



int call_dcbevent_notifiers(unsigned long val, void *v)

{

	return atomic_notifier_call_chain(&dcbevent_notif_chain, val, v);

}

net/dcb/dcbnl.c

+2 −0
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ 
#include <net/netlink.h>

#include <net/rtnetlink.h>

#include <linux/dcbnl.h>

#include <net/dcbevent.h>

#include <linux/rtnetlink.h>

#include <net/sock.h>
@@ -1460,6 +1461,7 @@ u8 dcb_setapp(struct net_device *dev, struct dcb_app *new) 
	}

out:

	spin_unlock(&dcb_lock);

	call_dcbevent_notifiers(DCB_APP_EVENT, new);

	return 0;

}

EXPORT_SYMBOL(dcb_setapp);