Received-SPF: pass (google.com: domain of linux-ext4-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Date:   Tue, 21 Jul 2020 13:35:05 -0700
From:   "Darrick J. Wong" <darrick.wong@oracle.com>
To:     Christoph Hellwig <hch@lst.de>
Cc:     Dave Chinner <david@fromorbit.com>,
        Goldwyn Rodrigues <rgoldwyn@suse.de>,
        Damien Le Moal <damien.lemoal@wdc.com>,
        Naohiro Aota <naohiro.aota@wdc.com>,
        Johannes Thumshirn <jth@kernel.org>,
        Matthew Wilcox <willy@infradead.org>,
        linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org,
        cluster-devel@redhat.com, linux-ext4@vger.kernel.org,
        linux-xfs@vger.kernel.org
Subject: Re: [PATCH 1/3] xfs: use ENOTBLK for direct I/O to buffered I/O
 fallback
Message-ID: <20200721203505.GE3151642@magnolia>
References: <20200721183157.202276-1-hch@lst.de>
 <20200721183157.202276-2-hch@lst.de>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20200721183157.202276-2-hch@lst.de>
Sender: linux-ext4-owner@vger.kernel.org
Precedence: bulk

On Tue, Jul 21, 2020 at 08:31:55PM +0200, Christoph Hellwig wrote:
> This is what the classic fs/direct-io.c implementation and thuse other
> file systems use.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>

Looks ok to me,
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>

--D

> ---
>  fs/xfs/xfs_file.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
> index 00db81eac80d6c..a6ef90457abf97 100644
> --- a/fs/xfs/xfs_file.c
> +++ b/fs/xfs/xfs_file.c
> @@ -505,7 +505,7 @@ xfs_file_dio_aio_write(
>  		 */
>  		if (xfs_is_cow_inode(ip)) {
>  			trace_xfs_reflink_bounce_dio_write(ip, iocb->ki_pos, count);
> -			return -EREMCHG;
> +			return -ENOTBLK;
>  		}
>  		iolock = XFS_IOLOCK_EXCL;
>  	} else {
> @@ -714,7 +714,7 @@ xfs_file_write_iter(
>  		 * allow an operation to fall back to buffered mode.
>  		 */
>  		ret = xfs_file_dio_aio_write(iocb, from);
> -		if (ret != -EREMCHG)
> +		if (ret != -ENOTBLK)
>  			return ret;
>  	}
>  
> -- 
> 2.27.0
>