linux-ext4 - Re: [PATCH v3 1/2] ext4: remove set 'EXT4_STATE_MAY_INLINE_DATA' flag from ext4_find_inline_data

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Date:   Mon, 6 Mar 2023 13:30:09 +0100
From:   Jan Kara <jack@...e.cz>
To:     Ye Bin <yebin@...weicloud.com>
Cc:     tytso@....edu, adilger.kernel@...ger.ca,
        linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org,
        jack@...e.cz, Ye Bin <yebin10@...wei.com>
Subject: Re: [PATCH v3 1/2] ext4: remove set 'EXT4_STATE_MAY_INLINE_DATA'
 flag from ext4_find_inline_data_nolock()

On Sat 04-03-23 10:54:57, Ye Bin wrote:
> From: Ye Bin <yebin10@...wei.com>
> 
> As only ext4_iget_extra_inode() call ext4_find_inline_data_nolock() need
> to set 'EXT4_STATE_MAY_INLINE_DATA' flag. The call in
> ext4_write_inline_data_end() is there only need to update i_inline_off.
> So move set 'EXT4_STATE_MAY_INLINE_DATA' flag from
> ext4_find_inline_data_nolock() to ext4_iget_extra_inode().

I'd just rephrase the changelog to be more comprehensible:

The only caller of ext4_find_inline_data_nolock() that needs setting of
EXT4_STATE_MAY_INLINE_DATA flag is ext4_iget_extra_inode(). In
ext4_write_inline_data_end() we just need to update inode->i_inline_off.
Since we are going to add one more caller that does not need to set
EXT4_STATE_MAY_INLINE_DATA, just move setting of EXT4_STATE_MAY_INLINE_DATA
out to ext4_iget_extra_inode().

Otherwise feel free to add:

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

								Honza

> 
> Signed-off-by: Ye Bin <yebin10@...wei.com>
> ---
>  fs/ext4/inline.c | 1 -
>  fs/ext4/inode.c  | 7 ++++++-
>  2 files changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
> index 2b42ececa46d..1602d74b5eeb 100644
> --- a/fs/ext4/inline.c
> +++ b/fs/ext4/inline.c
> @@ -159,7 +159,6 @@ int ext4_find_inline_data_nolock(struct inode *inode)
>  					(void *)ext4_raw_inode(&is.iloc));
>  		EXT4_I(inode)->i_inline_size = EXT4_MIN_INLINE_DATA_SIZE +
>  				le32_to_cpu(is.s.here->e_value_size);
> -		ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
>  	}
>  out:
>  	brelse(is.iloc.bh);
> diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
> index d251d705c276..bf0b7dea4900 100644
> --- a/fs/ext4/inode.c
> +++ b/fs/ext4/inode.c
> @@ -4797,8 +4797,13 @@ static inline int ext4_iget_extra_inode(struct inode *inode,
>  
>  	if (EXT4_INODE_HAS_XATTR_SPACE(inode)  &&
>  	    *magic == cpu_to_le32(EXT4_XATTR_MAGIC)) {
> +		int err;
> +
>  		ext4_set_inode_state(inode, EXT4_STATE_XATTR);
> -		return ext4_find_inline_data_nolock(inode);
> +		err = ext4_find_inline_data_nolock(inode);
> +		if (!err && ext4_has_inline_data(inode))
> +			ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
> +		return err;
>  	} else
>  		EXT4_I(inode)->i_inline_off = 0;
>  	return 0;
> -- 
> 2.31.1
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR