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qcow: Fix wrong alignment calculation
With the existing code, `round_up(7, 2)` would generate `6` which is obviously wrong. Also, following what's done for 'round_down()', the fixed code does not handle 'alignment == 0' explicitly. Signed-off-by: Bo Chen <chen.bo@intel.com>
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@ -69,7 +69,7 @@ impl RawFile {
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fn round_up(&self, offset: u64) -> u64 {
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let align: u64 = self.alignment.try_into().unwrap();
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((offset / (align + 1)) + 1) * align
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((offset + align - 1) / align) * align
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}
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fn round_down(&self, offset: u64) -> u64 {
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