File-copy from v4.4.100

This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Please refer to that tree for all history prior to this point.

Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/include/uapi/linux/nfs_fs.h b/include/uapi/linux/nfs_fs.h
new file mode 100644
index 0000000..4914228
--- /dev/null
+++ b/include/uapi/linux/nfs_fs.h
@@ -0,0 +1,61 @@
+/*
+ *  linux/include/linux/nfs_fs.h
+ *
+ *  Copyright (C) 1992  Rick Sladkey
+ *
+ *  OS-specific nfs filesystem definitions and declarations
+ */
+
+#ifndef _UAPI_LINUX_NFS_FS_H
+#define _UAPI_LINUX_NFS_FS_H
+
+#include <linux/magic.h>
+
+/* Default timeout values */
+#define NFS_DEF_UDP_TIMEO	(11)
+#define NFS_DEF_UDP_RETRANS	(3)
+#define NFS_DEF_TCP_TIMEO	(600)
+#define NFS_DEF_TCP_RETRANS	(2)
+
+#define NFS_MAX_UDP_TIMEOUT	(60*HZ)
+#define NFS_MAX_TCP_TIMEOUT	(600*HZ)
+
+#define NFS_DEF_ACREGMIN	(3)
+#define NFS_DEF_ACREGMAX	(60)
+#define NFS_DEF_ACDIRMIN	(30)
+#define NFS_DEF_ACDIRMAX	(60)
+
+/*
+ * When flushing a cluster of dirty pages, there can be different
+ * strategies:
+ */
+#define FLUSH_SYNC		1	/* file being synced, or contention */
+#define FLUSH_STABLE		4	/* commit to stable storage */
+#define FLUSH_LOWPRI		8	/* low priority background flush */
+#define FLUSH_HIGHPRI		16	/* high priority memory reclaim flush */
+#define FLUSH_COND_STABLE	32	/* conditional stable write - only stable
+					 * if everything fits in one RPC */
+
+
+/*
+ * NFS debug flags
+ */
+#define NFSDBG_VFS		0x0001
+#define NFSDBG_DIRCACHE		0x0002
+#define NFSDBG_LOOKUPCACHE	0x0004
+#define NFSDBG_PAGECACHE	0x0008
+#define NFSDBG_PROC		0x0010
+#define NFSDBG_XDR		0x0020
+#define NFSDBG_FILE		0x0040
+#define NFSDBG_ROOT		0x0080
+#define NFSDBG_CALLBACK		0x0100
+#define NFSDBG_CLIENT		0x0200
+#define NFSDBG_MOUNT		0x0400
+#define NFSDBG_FSCACHE		0x0800
+#define NFSDBG_PNFS		0x1000
+#define NFSDBG_PNFS_LD		0x2000
+#define NFSDBG_STATE		0x4000
+#define NFSDBG_ALL		0xFFFF
+
+
+#endif /* _UAPI_LINUX_NFS_FS_H */