<3>xfs_bmap3><1> [ 1><3>-a3><1> ] [ 1><3>-l3><1> ] [ 1><3>-d3><1> ] [ 1><3>-n 3><2>nnn2><1> ] file ...
1><2>extent2><1>1><7>: [7><1>1><2>startoffset2><1>1><7>..7><1>1><2>endoffset2><1>1><7>]: c 7><1>1><2>startblock2><1>1><7>..7><1>1><2>endblock2><1>
1><1>1><2><nblocks>2><1>1><7> 7><1>1><2>blocks2><1>1><7>