Re: [PATCH v2 09/15] xfs: use internal dfops in cow blocks cancel

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On Mon, Jul 23, 2018 at 09:04:08AM -0400, Brian Foster wrote:
> All callers either explicitly initialize a dfops or pass a
> transaction with an internal dfops. Drop the hacky old dfops
> replacement logic and use the one associated with the transaction.
> 
> Signed-off-by: Brian Foster <bfoster@xxxxxxxxxx>

Looks good.
Reviewed-by: Bill O'Donnell <billodo@xxxxxxxxxx>

> ---
>  fs/xfs/xfs_reflink.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c
> index 3143889097f1..c3f2a0d3e6f5 100644
> --- a/fs/xfs/xfs_reflink.c
> +++ b/fs/xfs/xfs_reflink.c
> @@ -483,8 +483,6 @@ xfs_reflink_cancel_cow_blocks(
>  	struct xfs_ifork		*ifp = XFS_IFORK_PTR(ip, XFS_COW_FORK);
>  	struct xfs_bmbt_irec		got, del;
>  	struct xfs_iext_cursor		icur;
> -	struct xfs_defer_ops		dfops;
> -	struct xfs_defer_ops		*odfops = (*tpp)->t_dfops;
>  	int				error = 0;
>  
>  	if (!xfs_is_reflink_inode(ip))
> @@ -511,7 +509,8 @@ xfs_reflink_cancel_cow_blocks(
>  			if (error)
>  				break;
>  		} else if (del.br_state == XFS_EXT_UNWRITTEN || cancel_real) {
> -			xfs_defer_init(*tpp, &dfops);
> +			ASSERT((*tpp)->t_dfops);
> +			ASSERT((*tpp)->t_firstblock == NULLFSBLOCK);
>  
>  			/* Free the CoW orphan record. */
>  			error = xfs_refcount_free_cow_extent(ip->i_mount,
> @@ -553,7 +552,6 @@ xfs_reflink_cancel_cow_blocks(
>  	/* clear tag if cow fork is emptied */
>  	if (!ifp->if_bytes)
>  		xfs_inode_clear_cowblocks_tag(ip);
> -	(*tpp)->t_dfops = odfops;
>  	return error;
>  }
>  
> -- 
> 2.17.1
> 
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