xfs: prevent extsize alignment from exceeding maximum extent size

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When doing delayed allocation, if the allocation size is for a
maximally sized extent, extent size alignment can push it over this
limit. This results in an assert failure in xfs_bmbt_set_allf() as
the extent length is too large to find in the extent record.

Fix this by ensuring that we allow for space that extent size
alignment requires (up to 2 * (extsize -1) blocks as we have to
handle both head and tail alignment) when limiting the maximum size
of the extent.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Alex Elder <aelder@sgi.com>

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Dave Chinner 2011-01-27 12:17:58 +11:00 • committed by Alex Elder

parent 14b064ceaa

commit 4ce159890c

1 changed files with 10 additions and 0 deletions

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fs/xfs/xfs_bmap.c

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