linux-ext4 - Re: [PATCH v2 1/2] ext4: use i_size_read() when converting initialized extent

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Message-ID: <20190121155619.GC21694@quack2.suse.cz>
Date:   Mon, 21 Jan 2019 16:56:19 +0100
From:   Jan Kara <jack@...e.cz>
To:     "zhangyi (F)" <yi.zhang@...wei.com>
Cc:     linux-ext4@...r.kernel.org, tytso@....edu,
        adilger.kernel@...ger.ca, miaoxie@...wei.com
Subject: Re: [PATCH v2 1/2] ext4: use i_size_read() when converting
 initialized extent

On Tue 18-12-18 22:03:41, zhangyi (F) wrote:
> Use i_size_read() in ext4_ext_convert_to_initialized() and
> ext4_split_convert_extents() because we haven't taken inode->i_rwsem
> in these two functions.
> 
> Signed-off-by: zhangyi (F) <yi.zhang@...wei.com>

The patch looks good. You can add:

Reviewed-by: Jan Kara <jack@...e.cz>

								Honza

> ---
>  fs/ext4/extents.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
> index 240b6de..0307fc6 100644
> --- a/fs/ext4/extents.c
> +++ b/fs/ext4/extents.c
> @@ -3483,7 +3483,7 @@ static int ext4_ext_convert_to_initialized(handle_t *handle,
>  		(unsigned long long)map->m_lblk, map_len);
>  
>  	sbi = EXT4_SB(inode->i_sb);
> -	eof_block = (inode->i_size + inode->i_sb->s_blocksize - 1) >>
> +	eof_block = (i_size_read(inode) + inode->i_sb->s_blocksize - 1) >>
>  		inode->i_sb->s_blocksize_bits;
>  	if (eof_block < map->m_lblk + map_len)
>  		eof_block = map->m_lblk + map_len;
> @@ -3739,7 +3739,7 @@ static int ext4_split_convert_extents(handle_t *handle,
>  		  __func__, inode->i_ino,
>  		  (unsigned long long)map->m_lblk, map->m_len);
>  
> -	eof_block = (inode->i_size + inode->i_sb->s_blocksize - 1) >>
> +	eof_block = (i_size_read(inode) + inode->i_sb->s_blocksize - 1) >>
>  		inode->i_sb->s_blocksize_bits;
>  	if (eof_block < map->m_lblk + map->m_len)
>  		eof_block = map->m_lblk + map->m_len;
> -- 
> 2.7.4
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR