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<a href="#NAME">NAME</a><br>
<a href="#SYNOPSIS">SYNOPSIS</a><br>
<a href="#DESCRIPTION">DESCRIPTION</a><br>
<a href="#DIAGNOSTICS">DIAGNOSTICS</a><br>
<a href="#SEE ALSO">SEE ALSO</a><br>
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<a name="NAME"></a><h2>NAME</h2><p><font size=3>xfs_bmap - print block mapping for an XFS file</p>
<a name="SYNOPSIS"></a><h2>SYNOPSIS</h2><p><font size=3><B>xfs_bmap</B> <font size=3>[ <font size=3><B>-a</B> <font size=3>] [ <font size=3><B>-l</B> <font size=3>] [ <font size=3><B>-d</B> <font size=3>] [ <font size=3><B>-n</B> <font size=3><I>nnn</I> <font size=3>] file ...</p>
<a name="DESCRIPTION"></a><h2>DESCRIPTION</h2><p><font size=3><I>xfs_bmap</I> <font size=3>prints the map of disk blocks used by files in an XFS filesystem. The map lists each <font size=3><I>extent</I> <font size=3>used by the file, as well as regions in the file that do not have any corresponding blocks (<font size=3><I>hole</I><font size=3>s). Each line of the listings takes the following form:</p>
<p><font size=3><I>extent: [startoffset..endoffset]: startblock..endblock</p>
</I><p><font size=3>Holes are marked by replacing the <font size=3><I>startblock..endblock</I> <font size=3>with <font size=3><I>hole</I><font size=3>. All the file offsets and disk blocks are in units of 512-byte blocks, no matter what the filesystem's block size is.</p>
<p><font size=3>If portions of the file have been migrated offline by a DMAPI application, a DMAPI read event will be generated to bring those portions back online before the disk block map is printed. However if the <font size=3><B>-d</B> <font size=3>option is used, no DMAPI read event will be generated for a DMAPI file and offline portions will be reported as holes.</p>
<p><font size=3>If the <font size=3><B>-l</B> <font size=3>option is used, then</p>
<p><font size=3><I>&lt;nblocks&gt; blocks</p>
</I><p><font size=3><I>will be appended to each line. Nblocks is the length of the extent described on the line in units of 512-byte blocks.</p>
</I><p><font size=3>If the <font size=3><B>-a</B> <font size=3>option is given, information about the file's attribute fork is printed instead of the default data fork.</p>
<p><font size=3>If the <font size=3><B>-n</B> <font size=3><I>nnn</I> <font size=3>option is given, <font size=3><B>xfs_bmap</B> <font size=3>obtains the extent list of the file in groups of <font size=3><I>nnn</I> <font size=3>extents. In the absence of <font size=3><B>-n</B><font size=3>, <font size=3><B>xfs_bmap</B> <font size=3>queries the system for the number of extents in the file and uses that value to compute the group size.</p>
<a name="DIAGNOSTICS"></a><h2>DIAGNOSTICS</h2><p><font size=3><I>fcntl(F_GETBMAPX) filename: Invalid argument<br>
<span style=" text-indent: 0.6000in;"></span></I>The file <font size=3><I>filename</I> <font size=3>is not in an XFS filesystem.</p>
<a name="SEE ALSO"></a><h2>SEE ALSO</h2><p><font size=3>fcntl(2), lv(7M), xlv(7M).<br>
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