xfs: convert unwritten status of reverse mappings

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Provide a function to convert an unwritten rmap extent to a real one
and vice versa.

[ dchinner: Note that this algorithm and code was derived from the
  existing bmapbt unwritten extent conversion code in
  xfs_bmap_add_extent_unwritten_real(). ]

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

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Darrick J. Wong 2016-08-03 12:03:19 +10:00 • committed by Dave Chinner

parent f922cd90b8

commit fb7d926769

2 changed files with 446 additions and 0 deletions

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441

fs/xfs/libxfs/xfs_rmap.c

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5

fs/xfs/xfs_trace.h

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