Re: [PATCH 3/5] xfs: fix zoned write iomap flags assignments

["Darrick J. Wong" <djwong@kernel.org>]

On Mon, Aug 10, 2026 at 08:37:44AM -0700, Christoph Hellwig wrote:
> Don't overwrite IOMAP_F_DIRTY with IOMAP_F_ANON_WRITE, but ensure both
> flags are set instead.
> 
> Note that in practice this is harmless as all zoned writes force a metadata
> transaction anyway, but incorrectly assigned flags are still a landmine
> that will cause problems at some point.
> 
> Fixes: 058dd70c65ab ("xfs: implement buffered writes to zoned RT devices")
> Fixes: 2e2383405824 ("xfs: implement direct writes to zoned RT devices")
> Signed-off-by: Christoph Hellwig <hch@lst.de>

Looks good,

Cc: <stable@vger.kernel.org> # v6.15
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>

--D

> ---
>  fs/xfs/xfs_aops.c  | 3 +--
>  fs/xfs/xfs_iomap.c | 3 +--
>  2 files changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
> index c80f05507373..9506cd8d15e6 100644
> --- a/fs/xfs/xfs_aops.c
> +++ b/fs/xfs/xfs_aops.c
> @@ -634,11 +634,10 @@ xfs_zoned_map_blocks(
>  	xfs_iunlock(ip, XFS_ILOCK_EXCL);
>  
>  	wpc->iomap.type = IOMAP_MAPPED;
> -	wpc->iomap.flags = IOMAP_F_DIRTY;
>  	wpc->iomap.bdev = mp->m_rtdev_targp->bt_bdev;
>  	wpc->iomap.offset = offset;
>  	wpc->iomap.length = XFS_FSB_TO_B(mp, count_fsb);
> -	wpc->iomap.flags = IOMAP_F_ANON_WRITE;
> +	wpc->iomap.flags = IOMAP_F_ANON_WRITE | IOMAP_F_DIRTY;
>  
>  	trace_xfs_zoned_map_blocks(ip, offset, wpc->iomap.length);
>  	return 0;
> diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
> index 225c3de88d03..9fa9aa33745f 100644
> --- a/fs/xfs/xfs_iomap.c
> +++ b/fs/xfs/xfs_iomap.c
> @@ -1081,11 +1081,10 @@ xfs_zoned_direct_write_iomap_begin(
>  	}
>  
>  	iomap->type = IOMAP_MAPPED;
> -	iomap->flags = IOMAP_F_DIRTY;
>  	iomap->bdev = ip->i_mount->m_rtdev_targp->bt_bdev;
>  	iomap->offset = offset;
>  	iomap->length = length;
> -	iomap->flags = IOMAP_F_ANON_WRITE;
> +	iomap->flags = IOMAP_F_ANON_WRITE | IOMAP_F_DIRTY;
>  	return 0;
>  }
>  
> -- 
> 2.53.0
> 
>