xfs: support preallocating and copying content into temporary files

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Create the routines we need to preallocate space in a temporary ondisk
file and then copy the contents of an xfile into the tempfile.  The
upcoming rtsummary repair feature will construct the contents of a
realtime summary file in memory, after which it will want to copy all
that into the ondisk temporary file before atomically committing the new
rtsummary contents.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>

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Darrick J. Wong 2024-04-15 14:54:31 -07:00

parent 5befb047b9

commit e81ce42413

3 changed files with 251 additions and 0 deletions

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197

fs/xfs/scrub/tempfile.c

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15

fs/xfs/scrub/tempfile.h

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39

fs/xfs/scrub/trace.h

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