xfs: add an allocation mode to xfs_alloc_file_space()

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xfs_alloc_file_space() hardcodes XFS_BMAPI_PREALLOC to preallocate
unwritten extents across a range.

In preparation for FALLOC_FL_WRITE_ZEROES, add an explicit allocation
mode argument, enum xfs_alloc_file_space_mode, and derive the xfs_bmapi
flags from it. The only mode for now is XFS_ALLOC_FILE_SPACE_PREALLOC,
which preallocates unwritten extents and marks the inode as preallocated
exactly as before, so there is no functional change.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Signed-off-by: Pankaj Raghav <p.raghav@samsung.com>
Signed-off-by: Carlos Maiolino <cem@kernel.org>

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This commit is contained in:

Pankaj Raghav 2026-07-06 10:41:16 +02:00 • committed by Carlos Maiolino

parent b28d23c516

commit 86e332447d

3 changed files with 32 additions and 8 deletions

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25

fs/xfs/xfs_bmap_util.c

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6

fs/xfs/xfs_bmap_util.h

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9

fs/xfs/xfs_file.c

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