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+.\" -*- nroff -*-
+.TH FILEFRAG 8 "@E2FSPROGS_MONTH@ @E2FSPROGS_YEAR@" "E2fsprogs version @E2FSPROGS_VERSION@"
+.SH NAME
+filefrag \- report on file fragmentation
+.SH SYNOPSIS
+.B filefrag
+[
+.BI \-b blocksize
+]
+[
+.B \-BeEkPsvVxX
+]
+[
+.I files...
+]
+.SH DESCRIPTION
+.B filefrag
+reports on how badly fragmented a particular file might be.  It makes
+allowances for indirect blocks for ext2 and ext3 file systems, but can be
+used on files for any file system.
+.PP
+The
+.B filefrag
+program initially attempts to get the
+extent information using FIEMAP ioctl which is more efficient and faster.
+If FIEMAP is not supported then filefrag will fall back to using FIBMAP.
+.SH OPTIONS
+.TP
+.B \-B
+Force the use of the older FIBMAP ioctl instead of the FIEMAP ioctl for
+testing purposes.
+.TP
+.BI \-b blocksize
+Use
+.I blocksize
+in bytes, or with [KMG] suffix, up to 1GB for output instead of the
+file system blocksize.  For compatibility with earlier versions of
+.BR filefrag ,
+if
+.I blocksize
+is unspecified it defaults to 1024 bytes.  Since
+.I blocksize
+is an optional argument, it must be added without any space after
+.BR -b .
+.TP
+.B \-e
+Print output in extent format, even for block-mapped files.
+.TP
+.B \-E
+Display the contents of ext4's extent status cache.  This feature is not
+supported on all kernels, and is only supported on ext4 file systems.
+.TP
+.B \-k
+Use 1024\-byte blocksize for output (identical to '\-b1024').
+.TP
+.B -P
+Pre-load the ext4 extent status cache for the file.  This is not
+supported on all kernels, and is only supported on ext4 file systems.
+.TP
+.B \-s
+Sync the file before requesting the mapping.
+.TP
+.B \-v
+Be verbose when checking for file fragmentation.
+.TP
+.B \-V
+Print version number of program and library.  If given twice, also
+print the FIEMAP flags that are understood by the current version.
+.TP
+.B \-x
+Display mapping of extended attributes.
+.TP
+.B \-X
+Display extent block numbers in hexadecimal format.
+.SH AUTHOR
+.B filefrag
+was written by Theodore Ts'o <tytso@mit.edu>.