linux-kernel - Re: [PATCH v3 07/13] ext4: fiemap: return correct extent physical length

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Date: Wed, 3 Apr 2024 13:22:04 +0200
From: Jan Kara <jack@...e.cz>
To: Sweet Tea Dorminy <sweettea-kernel@...miny.me>
Cc: Jonathan Corbet <corbet@....net>,
	Kent Overstreet <kent.overstreet@...ux.dev>,
	Brian Foster <bfoster@...hat.com>, Chris Mason <clm@...com>,
	Josef Bacik <josef@...icpanda.com>, David Sterba <dsterba@...e.com>,
	Jaegeuk Kim <jaegeuk@...nel.org>, Chao Yu <chao@...nel.org>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Christian Brauner <brauner@...nel.org>, Jan Kara <jack@...e.cz>,
	Mickaël Salaün <mic@...ikod.net>,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-bcachefs@...r.kernel.org, linux-btrfs@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net,
	linux-fsdevel@...r.kernel.org, kernel-team@...a.com
Subject: Re: [PATCH v3 07/13] ext4: fiemap: return correct extent physical
 length

On Wed 03-04-24 03:22:48, Sweet Tea Dorminy wrote:
> Signed-off-by: Sweet Tea Dorminy <sweettea-kernel@...miny.me>
> ---
>  fs/ext4/extents.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
> index 2adade3c202a..4874f757e1bd 100644
> --- a/fs/ext4/extents.c
> +++ b/fs/ext4/extents.c
> @@ -2194,7 +2194,7 @@ static int ext4_fill_es_cache_info(struct inode *inode,
>  
>  	while (block <= end) {
>  		next = 0;
> -		flags = 0;
> +		flags = FIEMAP_EXTENT_HAS_PHYS_LEN;

OK, but we should then pass (__u64)es.es_len << blksize_bits as physical
extent length below, shouldn't we?

>  		if (!ext4_es_lookup_extent(inode, block, &next, &es))
>  			break;
>  		if (ext4_es_is_unwritten(&es))

								Honza
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR