On Wed, Apr 28, 2021 at 10:44:16PM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <djwong@xxxxxxxxxx>
>
> The final parameter of filemap_write_and_wait_range is the end of the
> range to flush, not the length of the range to flush.
>
> Fixes: 46afb0628b86 ("xfs: only flush the unshared range in xfs_reflink_unshare")
> Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
> ---
Reviewed-by: Brian Foster <bfoster@xxxxxxxxxx>
> fs/xfs/xfs_reflink.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c
> index 4dd4af6ac2ef..060695d6d56a 100644
> --- a/fs/xfs/xfs_reflink.c
> +++ b/fs/xfs/xfs_reflink.c
> @@ -1522,7 +1522,8 @@ xfs_reflink_unshare(
> if (error)
> goto out;
>
> - error = filemap_write_and_wait_range(inode->i_mapping, offset, len);
> + error = filemap_write_and_wait_range(inode->i_mapping, offset,
> + offset + len - 1);
> if (error)
> goto out;
>
>
