xfs: handle EOF correctly in xfs_vm_writepage

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We need to zero out part of a page which beyond EOF before setting uptodate,
otherwise, mapread or write will see non-zero data beyond EOF.

Based on the code in fs/buffer.c and the following ext4 commit:

  ext4: handle EOF correctly in ext4_bio_write_page()

And yes, I wish we had a good test case for it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

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Christoph Hellwig 2012-07-03 12:20:00 -04:00 • committed by Ben Myers

parent 69ff282611

commit 6b7a03f03a

1 changed files with 17 additions and 2 deletions

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fs/xfs/xfs_aops.c

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