linux-kernel - Re: [PATCH 04/11] fuse: Convert fuse_flush() to use file_check_and_advance_wb

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Date:   Mon, 09 Jan 2023 10:25:13 -0500
From:   Jeff Layton <jlayton@...hat.com>
To:     "Matthew Wilcox (Oracle)" <willy@...radead.org>
Cc:     linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Christoph Hellwig <hch@....de>
Subject: Re: [PATCH 04/11] fuse: Convert fuse_flush() to use
 file_check_and_advance_wb_err()

On Mon, 2023-01-09 at 05:18 +0000, Matthew Wilcox (Oracle) wrote:
> As with fsync, use the newer file_check_and_advance_wb_err() instead
> of filemap_check_errors().
> 
> Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
> ---
>  fs/fuse/file.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/fs/fuse/file.c b/fs/fuse/file.c
> index 875314ee6f59..7174646ddf09 100644
> --- a/fs/fuse/file.c
> +++ b/fs/fuse/file.c
> @@ -500,11 +500,10 @@ static int fuse_flush(struct file *file, fl_owner_t id)
>  	fuse_sync_writes(inode);
>  	inode_unlock(inode);
>  
> -	err = filemap_check_errors(file->f_mapping);
> +	err = file_check_and_advance_wb_err(file);
>  	if (err)
>  		return err;
> 
> 

I think it'd be best to not advance the f_wb_err here. ->flush is called
on filp_close which is mainly close() syscalls, but there are some other
callers too, and an error reported by ->flush can be discarded.



>  
> -	err = 0;
>  	if (fm->fc->no_flush)
>  		goto inval_attr_out;
>  

-- 
Jeff Layton <jlayton@...hat.com>