.\" Copyright (c) 2015 Jaegeuk Kim <jaegeuk@kernel.org>
.\"
.TH DEFRAG.F2FS 8
.SH NAME
defrag.f2fs \- relocate blocks in a given area to the specified region
.SH SYNOPSIS
.B defrag.f2fs
[
.B \-s
.I start block address
]
[
.B \-l
.I number of blocks
]
[
.B \-t
.I target block address
]
[
.B \-i
.I direction
]
[
.B \-d
.I debugging-level
]
.I device
.SH DESCRIPTION
.B defrag.f2fs
is used to move specified number of blocks starting from a given block address
to the target block address with a direction.
\fIdevice\fP is the special file corresponding to the device (e.g.
\fI/dev/sdXX\fP).

For example,
# defrag.f2fs -s 0x4000 -l 0x100 -t 0x10000 -i /dev/sdb1

This moves blocks between 0x4000 and 0x4100 to the left-hand area of 0x10000.

.PP
The exit code returned by
.B defrag.f2fs
is 0 on success and -1 on failure.
.SH OPTIONS
.TP
.BI \-s " start block address"
Specify the starting block address.
.TP
.BI \-l " number of blocks"
Specifiy the number of blocks to move.
.TP
.BI \-t " target block address"
Specify the destination block address.
.TP
.BI \-i " direction"
Set the direction to left. If it is not set, the direction becomes right
by default.
.TP
.BI \-d " debug-level"
Specify the level of debugging options.
The default number is 0, which shows basic debugging messages.
.TP
.SH AUTHOR
This version of
.B defrag.f2fs
has been written by Jaegeuk Kim <jaegeuk@kernel.org>.
.SH AVAILABILITY
.B defrag.f2fs
is available from git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs-tools.git.
.SH SEE ALSO
.BR mkfs.f2fs(8),
.BR dump.f2fs(8),
.BR fsck.f2fs(8),
.BR resize.f2fs(8),
.BR sload.f2fs(8).