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authorJohn Fastabend <john.r.fastabend@intel.com>2010-12-30 09:26:37 +0000
committerDavid S. Miller <davem@davemloft.net>2010-12-31 10:47:46 -0800
commit96b99684e365f28d49bdb1221ca022b75cb91a98 (patch)
treeaabba68117d465f619678ff77ea084c9395223d6 /net
parent9ab933ab2cc80f04690d6aa385b1110075c5e507 (diff)
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: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/dcb/Makefile2
-rw-r--r--net/dcb/dcbevent.c40
-rw-r--r--net/dcb/dcbnl.c2
3 files changed, 43 insertions, 1 deletions
diff --git a/net/dcb/Makefile b/net/dcb/Makefile
index 9930f4cde81..c1282c9e64f 100644
--- a/net/dcb/Makefile
+++ b/net/dcb/Makefile
@@ -1 +1 @@
-obj-$(CONFIG_DCB) += dcbnl.o
+obj-$(CONFIG_DCB) += dcbnl.o dcbevent.o
diff --git a/net/dcb/dcbevent.c b/net/dcb/dcbevent.c
new file mode 100644
index 00000000000..665a8802105
--- /dev/null
+++ b/net/dcb/dcbevent.c
@@ -0,0 +1,40 @@
+/*
+ * 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);
+}
diff --git a/net/dcb/dcbnl.c b/net/dcb/dcbnl.c
index cfd731faf6c..69144125fc4 100644
--- a/net/dcb/dcbnl.c
+++ b/net/dcb/dcbnl.c
@@ -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);