xfs: implement XFS_IOC_DIOINFO in terms of vfs_getattr

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Use the direct I/O alignment reporting from ->getattr instead of
reimplementing it.  This exposes the relaxation of the memory
alignment in the XFS_IOC_DIOINFO info and ensure the information will
stay in sync.  Note that randholes.c in xfstests has a bug where it
incorrectly fails when the required memory alignment is smaller than the
pointer size.  Round up the reported value as there is a fair chance that
this code got copied into various applications.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Signed-off-by: Carlos Maiolino <cem@kernel.org>

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Christoph Hellwig 2025-08-25 13:15:00 +02:00 • committed by Carlos Maiolino

parent 0239bd9fa4

commit 851c4c96db

1 changed files with 9 additions and 9 deletions

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fs/xfs/xfs_ioctl.c

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