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diff --git a/fs/xfs/xfs_dfrag.h b/fs/xfs/xfs_dfrag.h
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+/*
+ * Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like. Any license provided herein, whether implied or
+ * otherwise, applies only to this software file. Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA 94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+#ifndef __XFS_DFRAG_H__
+#define __XFS_DFRAG_H__
+
+/*
+ * Structure passed to xfs_swapext
+ */
+
+typedef struct xfs_swapext
+{
+ __int64_t sx_version; /* version */
+ __int64_t sx_fdtarget; /* fd of target file */
+ __int64_t sx_fdtmp; /* fd of tmp file */
+ xfs_off_t sx_offset; /* offset into file */
+ xfs_off_t sx_length; /* leng from offset */
+ char sx_pad[16]; /* pad space, unused */
+ xfs_bstat_t sx_stat; /* stat of target b4 copy */
+} xfs_swapext_t;
+
+/*
+ * Version flag
+ */
+#define XFS_SX_VERSION 0
+
+#ifdef __KERNEL__
+/*
+ * Prototypes for visible xfs_dfrag.c routines.
+ */
+
+/*
+ * Syscall interface for xfs_swapext
+ */
+int xfs_swapext(struct xfs_swapext __user *sx);
+
+#endif /* __KERNEL__ */
+
+#endif /* __XFS_DFRAG_H__ */