Re: [PATCH 6/6] fs: xfs: Set FMODE_CAN_ATOMIC_WRITE for FS_XFLAG_ATOMICWRITES set

From: Darrick J. Wong
Date: Fri Feb 02 2024 - 13:06:30 EST


On Wed, Jan 24, 2024 at 02:26:45PM +0000, John Garry wrote:
> For when an inode is enabled for atomic writes, set FMODE_CAN_ATOMIC_WRITE
> flag.
>
> Signed-off-by: John Garry <john.g.garry@xxxxxxxxxx>
> ---
> fs/xfs/xfs_file.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
> index e33e5e13b95f..1375d0089806 100644
> --- a/fs/xfs/xfs_file.c
> +++ b/fs/xfs/xfs_file.c
> @@ -1232,6 +1232,8 @@ xfs_file_open(
> return -EIO;
> file->f_mode |= FMODE_NOWAIT | FMODE_BUF_RASYNC | FMODE_BUF_WASYNC |
> FMODE_DIO_PARALLEL_WRITE | FMODE_CAN_ODIRECT;
> + if (xfs_inode_atomicwrites(XFS_I(inode)))

Shouldn't we check that the device supports AWU at all before turning on
the FMODE flag?

--D

> + file->f_mode |= FMODE_CAN_ATOMIC_WRITE;
> return generic_file_open(inode, file);
> }
>
> --
> 2.31.1
>
>