xfs_bmap - print block mapping for an XFS file

xfs_bmap  prints  the  map  of disk blocks used by files in an XFS filesystem.  The map lists each extent
       used by the file, as well as regions in the file that do not have any corresponding blocks (holes).  Each
       line of the listings takes the following form:

              extent: [startoffset..endoffset]: startblock..endblock

       Holes are marked by replacing the startblock..endblock with hole.  All the file offsets and  disk  blocks
       are in units of 512-byte blocks, no matter what the filesystem's block size is.

       xfs_bmap - print block mapping for an XFS file

-a     If this option is specified, information about the file's attribute fork is printed instead of the
              default data fork.

       -e     If  this option is used, xfs_bmap obtains all delayed allocation extents, and does not flush dirty
              pages to disk before querying extent data. With the -v option, the flags column  will  show  which
              extents have not yet been allocated.

       -l     If this option is used, then

                   <nblocks>  blocks

              will be appended to each line.  nblocks is the length of the extent described on the line in units
              of 512-byte blocks.

              This flag has no effect if the -v option is used.

       -nnum_extents
              If  this option is given, xfs_bmap will display at most num_extents extents. In the absence of -n,
              xfs_bmap will display all extents in the file.

       -p     If this option is used, xfs_bmap obtains all unwritten (preallocated) extents that do not  contain
              written   data.   With   the   -v   option,   the   flags  column  will  show  which  extents  are
              preallocated/unwritten.

       -v     Shows verbose information. When this flag is specified,  additional  AG  specific  information  is
              appended to each line in the following form:

                   agno (startagoffset..endagoffset) nblocksflags

              A second -v option will print out the flags legend.

       -V     Prints the version number and exits.

xfs_fsr(8), xfs(5).

                                                                                                     xfs_bmap(8)

xfs_bmap [ -adelpv ] [ -nnum_extents ] filexfs_bmap-V