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iomap: Fix iomap_dio_rw return value for user copies
When a user copy fails in one of the helpers of iomap_dio_rw, fail with -EFAULT instead of returning 0. This matches what iomap_dio_bio_actor returns when it gets an -EFAULT from bio_iov_iter_get_pages. With these changes, iomap_dio_actor now consistently fails with -EFAULT when a user page cannot be faulted in. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
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1 changed files with 4 additions and 0 deletions
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@ -371,6 +371,8 @@ static loff_t iomap_dio_hole_iter(const struct iomap_iter *iter,
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loff_t length = iov_iter_zero(iomap_length(iter), dio->submit.iter);
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loff_t length = iov_iter_zero(iomap_length(iter), dio->submit.iter);
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dio->size += length;
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dio->size += length;
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if (!length)
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return -EFAULT;
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return length;
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return length;
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}
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}
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@ -402,6 +404,8 @@ static loff_t iomap_dio_inline_iter(const struct iomap_iter *iomi,
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copied = copy_to_iter(inline_data, length, iter);
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copied = copy_to_iter(inline_data, length, iter);
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}
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}
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dio->size += copied;
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dio->size += copied;
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if (!copied)
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return -EFAULT;
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return copied;
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return copied;
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}
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}
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