xfs: return work remaining at the end of a bunmapi operation

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Return the range of file blocks that bunmapi didn't free.  This hint
is used by CoW and reflink to figure out what part of an extent
actually got freed so that it can set up the appropriate atomic
remapping of just the freed range.

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 09:11:29 -07:00

parent 17c12bcd30

commit 4453593be6

2 changed files with 34 additions and 6 deletions

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36

fs/xfs/libxfs/xfs_bmap.c

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4

fs/xfs/libxfs/xfs_bmap.h

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