xfs: reflink extents from one file to another

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Reflink extents from one file to another; that is to say, iteratively
remove the mappings from the destination file, copy the mappings from
the source file to the destination file, and increment the reference
count of all the blocks that got remapped.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>

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This commit is contained in:

Darrick J. Wong 2016-10-03 09:11:40 -07:00

parent 174edb0e46

commit 862bb360ef

2 changed files with 430 additions and 0 deletions

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428

fs/xfs/xfs_reflink.c

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2

fs/xfs/xfs_reflink.h

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