xfs: allocate direct I/O COW blocks in iomap_begin

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Instead of preallocating all the required COW blocks in the high-level
write code do it inside the iomap code, like we do for all other I/O.

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

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Christoph Hellwig 2017-02-06 10:51:03 -08:00 • committed by Darrick J. Wong

parent a14234c72b

commit 3c68d44a2b

5 changed files with 68 additions and 123 deletions

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8

fs/xfs/xfs_file.c

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31

fs/xfs/xfs_iomap.c

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146

fs/xfs/xfs_reflink.c

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4

fs/xfs/xfs_reflink.h

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2

fs/xfs/xfs_trace.h

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