NAME

       xfs_bmap - print block mapping for an XFS file

SYNOPSIS

       xfs_bmap [ -adelpv ] [ -n num_extents ] file
       xfs_bmap -V

DESCRIPTION

       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.

OPTIONS

       -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.

       -n num_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) nblocks flags

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

       -V     Prints the version number and exits.

SEE ALSO

       xfs_fsr(8), xfs(5).

                                                                                      xfs_bmap(8)