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, 98 insertions, 0 deletions

diff --git a/kernel/include/linux/if_pppox.h b/kernel/include/linux/if_pppox.h
new file mode 100644
index 000000000..66a7d7600
--- /dev/null
+++ b/kernel/include/linux/if_pppox.h
@@ -0,0 +1,98 @@
+/***************************************************************************
+ * Linux PPP over X - Generic PPP transport layer sockets
+ * Linux PPP over Ethernet (PPPoE) Socket Implementation (RFC 2516) 
+ *
+ * This file supplies definitions required by the PPP over Ethernet driver
+ * (pppox.c).  All version information wrt this file is located in pppox.c
+ *
+ * License:
+ *		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.
+ *
+ */
+#ifndef __LINUX_IF_PPPOX_H
+#define __LINUX_IF_PPPOX_H
+
+#include <linux/if.h>
+#include <linux/netdevice.h>
+#include <linux/ppp_channel.h>
+#include <linux/skbuff.h>
+#include <linux/workqueue.h>
+#include <uapi/linux/if_pppox.h>
+
+static inline struct pppoe_hdr *pppoe_hdr(const struct sk_buff *skb)
+{
+	return (struct pppoe_hdr *)skb_network_header(skb);
+}
+
+struct pppoe_opt {
+	struct net_device      *dev;	  /* device associated with socket*/
+	int			ifindex;  /* ifindex of device associated with socket */
+	struct pppoe_addr	pa;	  /* what this socket is bound to*/
+	struct sockaddr_pppox	relay;	  /* what socket data will be
+					     relayed to (PPPoE relaying) */
+	struct work_struct      padt_work;/* Work item for handling PADT */
+};
+
+struct pptp_opt {
+	struct pptp_addr src_addr;
+	struct pptp_addr dst_addr;
+	u32 ack_sent, ack_recv;
+	u32 seq_sent, seq_recv;
+	int ppp_flags;
+};
+#include <net/sock.h>
+
+struct pppox_sock {
+	/* struct sock must be the first member of pppox_sock */
+	struct sock sk;
+	struct ppp_channel chan;
+	struct pppox_sock	*next;	  /* for hash table */
+	union {
+		struct pppoe_opt pppoe;
+		struct pptp_opt  pptp;
+	} proto;
+	__be16			num;
+};
+#define pppoe_dev	proto.pppoe.dev
+#define pppoe_ifindex	proto.pppoe.ifindex
+#define pppoe_pa	proto.pppoe.pa
+#define pppoe_relay	proto.pppoe.relay
+
+static inline struct pppox_sock *pppox_sk(struct sock *sk)
+{
+	return (struct pppox_sock *)sk;
+}
+
+static inline struct sock *sk_pppox(struct pppox_sock *po)
+{
+	return (struct sock *)po;
+}
+
+struct module;
+
+struct pppox_proto {
+	int		(*create)(struct net *net, struct socket *sock);
+	int		(*ioctl)(struct socket *sock, unsigned int cmd,
+				 unsigned long arg);
+	struct module	*owner;
+};
+
+extern int register_pppox_proto(int proto_num, const struct pppox_proto *pp);
+extern void unregister_pppox_proto(int proto_num);
+extern void pppox_unbind_sock(struct sock *sk);/* delete ppp-channel binding */
+extern int pppox_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
+
+/* PPPoX socket states */
+enum {
+    PPPOX_NONE		= 0,  /* initial state */
+    PPPOX_CONNECTED	= 1,  /* connection established ==TCP_ESTABLISHED */
+    PPPOX_BOUND		= 2,  /* bound to ppp device */
+    PPPOX_RELAY		= 4,  /* forwarding is enabled */
+    PPPOX_ZOMBIE	= 8,  /* dead, but still bound to ppp device */
+    PPPOX_DEAD		= 16  /* dead, useless, please clean me up!*/
+};
+
+#endif /* !(__LINUX_IF_PPPOX_H) */