linux-ext4 - Re: [PATCH 2/2] ext2: set FMODE_CAN_ODIRECT instead of a dummy direct

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Message-ID: <20240313181444.3m2px4k74eq3e27y@quack3>
Date: Wed, 13 Mar 2024 19:14:44 +0100
From: Jan Kara <jack@...e.cz>
To: "Ritesh Harjani (IBM)" <ritesh.list@...il.com>
Cc: linux-ext4@...r.kernel.org, Jan Kara <jack@...e.cz>,
	Christoph Hellwig <hch@....de>
Subject: Re: [PATCH 2/2] ext2: set FMODE_CAN_ODIRECT instead of a dummy
 direct_IO method

On Thu 29-02-24 19:54:13, Ritesh Harjani (IBM) wrote:
> Since commit a2ad63daa88b ("VFS: add FMODE_CAN_ODIRECT file flag") file
> systems can just set the FMODE_CAN_ODIRECT flag at open time instead of
> wiring up a dummy direct_IO method to indicate support for direct I/O.
> 
> Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@...il.com>

Thanks. I'll take this into my tree once the merge window closes.

								Honza

> ---
>  fs/ext2/file.c  | 8 +++++++-
>  fs/ext2/inode.c | 2 --
>  2 files changed, 7 insertions(+), 3 deletions(-)
> 
> diff --git a/fs/ext2/file.c b/fs/ext2/file.c
> index 4ddc36f4dbd4..10b061ac5bc0 100644
> --- a/fs/ext2/file.c
> +++ b/fs/ext2/file.c
> @@ -302,6 +302,12 @@ static ssize_t ext2_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
>  	return generic_file_write_iter(iocb, from);
>  }
>  
> +static int ext2_file_open(struct inode *inode, struct file *filp)
> +{
> +	filp->f_mode |= FMODE_CAN_ODIRECT;
> +	return dquot_file_open(inode, filp);
> +}
> +
>  const struct file_operations ext2_file_operations = {
>  	.llseek		= generic_file_llseek,
>  	.read_iter	= ext2_file_read_iter,
> @@ -311,7 +317,7 @@ const struct file_operations ext2_file_operations = {
>  	.compat_ioctl	= ext2_compat_ioctl,
>  #endif
>  	.mmap		= ext2_file_mmap,
> -	.open		= dquot_file_open,
> +	.open		= ext2_file_open,
>  	.release	= ext2_release_file,
>  	.fsync		= ext2_fsync,
>  	.get_unmapped_area = thp_get_unmapped_area,
> diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
> index 5a4272b2c6b0..6f719d784eb9 100644
> --- a/fs/ext2/inode.c
> +++ b/fs/ext2/inode.c
> @@ -965,7 +965,6 @@ const struct address_space_operations ext2_aops = {
>  	.write_begin		= ext2_write_begin,
>  	.write_end		= ext2_write_end,
>  	.bmap			= ext2_bmap,
> -	.direct_IO		= noop_direct_IO,
>  	.writepages		= ext2_writepages,
>  	.migrate_folio		= buffer_migrate_folio,
>  	.is_partially_uptodate	= block_is_partially_uptodate,
> @@ -974,7 +973,6 @@ const struct address_space_operations ext2_aops = {
>  
>  static const struct address_space_operations ext2_dax_aops = {
>  	.writepages		= ext2_dax_writepages,
> -	.direct_IO		= noop_direct_IO,
>  	.dirty_folio		= noop_dirty_folio,
>  };
>  
> -- 
> 2.39.2
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR