On Fri, Jul 18, 2014 at 09:55:43AM +0800, Qu Wenruo wrote: > When page aligned start and len passed to extent_fiemap(), the result is > good, but when start and len is not aligned, e.g. start = 1 and len = > 4095 is passed to extent_fiemap(), it returns no extent. > > The problem is that start and len is all rounded down which causes the > problem.
ALIGN rounds up, not down. So the wrong rounding will use incorrect start (4096) and finds no extents if there's eg. only one [0,4095]. > This patch will round down start and round up (start + len) to > return right extent. > > Reported-by: Chandan Rajendra <[email protected]> > Signed-off-by: Qu Wenruo <[email protected]> Reviewed-by: David Sterba <[email protected]> -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
