linux-kernel - Re: [PATCH 7/7] ext4: show 'shutdown' hint when ext4 is forced to shutdown

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Message-ID: <sishjtws6welda7u5zwd7ca5wbfmde4rexz3f6gfevw7trjnlu@yqfwu7ibteyf>
Date: Tue, 21 Jan 2025 14:13:51 +0100
From: Jan Kara <jack@...e.cz>
To: libaokun@...weicloud.com
Cc: linux-ext4@...r.kernel.org, tytso@....edu, adilger.kernel@...ger.ca, 
	jack@...e.cz, linux-kernel@...r.kernel.org, yi.zhang@...wei.com, 
	yangerkun@...wei.com, Baokun Li <libaokun1@...wei.com>
Subject: Re: [PATCH 7/7] ext4: show 'shutdown' hint when ext4 is forced to
 shutdown

On Fri 17-01-25 16:23:15, libaokun@...weicloud.com wrote:
> From: Baokun Li <libaokun1@...wei.com>
> 
> Now, if dmesg is cleared, we have no way of knowing if the file system has
> been shutdown. Moreover, ext4 allows directory reads even after the file
> system has been shutdown, so when reading a file returns -EIO, we cannot
> determine whether this is a hardware issue or if the file system has been
> shutdown.
> 
> Therefore, when ext4 file system is shutdown, we're adding a 'shutdown'
> hint to commands like mount so users can easily check the file system's
> status.
> 
> Signed-off-by: Baokun Li <libaokun1@...wei.com>

Looks good. Feel free to add:

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

								Honza

> ---
>  fs/ext4/super.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/fs/ext4/super.c b/fs/ext4/super.c
> index 2377ebf0aff1..b15c36df934c 100644
> --- a/fs/ext4/super.c
> +++ b/fs/ext4/super.c
> @@ -3032,6 +3032,9 @@ static int _ext4_show_options(struct seq_file *seq, struct super_block *sb,
>  	if (ext4_emergency_ro(sb))
>  		SEQ_OPTS_PUTS("emergency_ro");
>  
> +	if (ext4_forced_shutdown(sb))
> +		SEQ_OPTS_PUTS("shutdown");
> +
>  	ext4_show_quota_options(seq, sb);
>  	return 0;
>  }
> -- 
> 2.39.2
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR