Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 198 insertions, 0 deletions

diff --git a/kernel/net/ax25/ax25_dev.c b/kernel/net/ax25/ax25_dev.c
new file mode 100644
index 000000000..3d106767b
--- /dev/null
+++ b/kernel/net/ax25/ax25_dev.c
@@ -0,0 +1,198 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
+ */
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/slab.h>
+#include <linux/in.h>
+#include <linux/kernel.h>
+#include <linux/timer.h>
+#include <linux/string.h>
+#include <linux/sockios.h>
+#include <linux/net.h>
+#include <linux/spinlock.h>
+#include <net/ax25.h>
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include <linux/skbuff.h>
+#include <net/sock.h>
+#include <asm/uaccess.h>
+#include <linux/fcntl.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+
+ax25_dev *ax25_dev_list;
+DEFINE_SPINLOCK(ax25_dev_lock);
+
+ax25_dev *ax25_addr_ax25dev(ax25_address *addr)
+{
+	ax25_dev *ax25_dev, *res = NULL;
+
+	spin_lock_bh(&ax25_dev_lock);
+	for (ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next)
+		if (ax25cmp(addr, (ax25_address *)ax25_dev->dev->dev_addr) == 0) {
+			res = ax25_dev;
+		}
+	spin_unlock_bh(&ax25_dev_lock);
+
+	return res;
+}
+
+/*
+ *	This is called when an interface is brought up. These are
+ *	reasonable defaults.
+ */
+void ax25_dev_device_up(struct net_device *dev)
+{
+	ax25_dev *ax25_dev;
+
+	if ((ax25_dev = kzalloc(sizeof(*ax25_dev), GFP_ATOMIC)) == NULL) {
+		printk(KERN_ERR "AX.25: ax25_dev_device_up - out of memory\n");
+		return;
+	}
+
+	dev->ax25_ptr     = ax25_dev;
+	ax25_dev->dev     = dev;
+	dev_hold(dev);
+	ax25_dev->forward = NULL;
+
+	ax25_dev->values[AX25_VALUES_IPDEFMODE] = AX25_DEF_IPDEFMODE;
+	ax25_dev->values[AX25_VALUES_AXDEFMODE] = AX25_DEF_AXDEFMODE;
+	ax25_dev->values[AX25_VALUES_BACKOFF]   = AX25_DEF_BACKOFF;
+	ax25_dev->values[AX25_VALUES_CONMODE]   = AX25_DEF_CONMODE;
+	ax25_dev->values[AX25_VALUES_WINDOW]    = AX25_DEF_WINDOW;
+	ax25_dev->values[AX25_VALUES_EWINDOW]   = AX25_DEF_EWINDOW;
+	ax25_dev->values[AX25_VALUES_T1]        = AX25_DEF_T1;
+	ax25_dev->values[AX25_VALUES_T2]        = AX25_DEF_T2;
+	ax25_dev->values[AX25_VALUES_T3]        = AX25_DEF_T3;
+	ax25_dev->values[AX25_VALUES_IDLE]	= AX25_DEF_IDLE;
+	ax25_dev->values[AX25_VALUES_N2]        = AX25_DEF_N2;
+	ax25_dev->values[AX25_VALUES_PACLEN]	= AX25_DEF_PACLEN;
+	ax25_dev->values[AX25_VALUES_PROTOCOL]  = AX25_DEF_PROTOCOL;
+	ax25_dev->values[AX25_VALUES_DS_TIMEOUT]= AX25_DEF_DS_TIMEOUT;
+
+#if defined(CONFIG_AX25_DAMA_SLAVE) || defined(CONFIG_AX25_DAMA_MASTER)
+	ax25_ds_setup_timer(ax25_dev);
+#endif
+
+	spin_lock_bh(&ax25_dev_lock);
+	ax25_dev->next = ax25_dev_list;
+	ax25_dev_list  = ax25_dev;
+	spin_unlock_bh(&ax25_dev_lock);
+
+	ax25_register_dev_sysctl(ax25_dev);
+}
+
+void ax25_dev_device_down(struct net_device *dev)
+{
+	ax25_dev *s, *ax25_dev;
+
+	if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
+		return;
+
+	ax25_unregister_dev_sysctl(ax25_dev);
+
+	spin_lock_bh(&ax25_dev_lock);
+
+#ifdef CONFIG_AX25_DAMA_SLAVE
+	ax25_ds_del_timer(ax25_dev);
+#endif
+
+	/*
+	 *	Remove any packet forwarding that points to this device.
+	 */
+	for (s = ax25_dev_list; s != NULL; s = s->next)
+		if (s->forward == dev)
+			s->forward = NULL;
+
+	if ((s = ax25_dev_list) == ax25_dev) {
+		ax25_dev_list = s->next;
+		spin_unlock_bh(&ax25_dev_lock);
+		dev_put(dev);
+		kfree(ax25_dev);
+		return;
+	}
+
+	while (s != NULL && s->next != NULL) {
+		if (s->next == ax25_dev) {
+			s->next = ax25_dev->next;
+			spin_unlock_bh(&ax25_dev_lock);
+			dev_put(dev);
+			kfree(ax25_dev);
+			return;
+		}
+
+		s = s->next;
+	}
+	spin_unlock_bh(&ax25_dev_lock);
+	dev->ax25_ptr = NULL;
+}
+
+int ax25_fwd_ioctl(unsigned int cmd, struct ax25_fwd_struct *fwd)
+{
+	ax25_dev *ax25_dev, *fwd_dev;
+
+	if ((ax25_dev = ax25_addr_ax25dev(&fwd->port_from)) == NULL)
+		return -EINVAL;
+
+	switch (cmd) {
+	case SIOCAX25ADDFWD:
+		if ((fwd_dev = ax25_addr_ax25dev(&fwd->port_to)) == NULL)
+			return -EINVAL;
+		if (ax25_dev->forward != NULL)
+			return -EINVAL;
+		ax25_dev->forward = fwd_dev->dev;
+		break;
+
+	case SIOCAX25DELFWD:
+		if (ax25_dev->forward == NULL)
+			return -EINVAL;
+		ax25_dev->forward = NULL;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+struct net_device *ax25_fwd_dev(struct net_device *dev)
+{
+	ax25_dev *ax25_dev;
+
+	if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
+		return dev;
+
+	if (ax25_dev->forward == NULL)
+		return dev;
+
+	return ax25_dev->forward;
+}
+
+/*
+ *	Free all memory associated with device structures.
+ */
+void __exit ax25_dev_free(void)
+{
+	ax25_dev *s, *ax25_dev;
+
+	spin_lock_bh(&ax25_dev_lock);
+	ax25_dev = ax25_dev_list;
+	while (ax25_dev != NULL) {
+		s        = ax25_dev;
+		dev_put(ax25_dev->dev);
+		ax25_dev = ax25_dev->next;
+		kfree(s);
+	}
+	ax25_dev_list = NULL;
+	spin_unlock_bh(&ax25_dev_lock);
+}