linux-kernel - Re: [PATCH v4 2/2] ext4: make sure fs error flag setted before clear journal error

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Message-ID: <287af40c-4ac9-d773-830a-6daa1f16102a@huawei.com>
Date:   Thu, 2 Mar 2023 09:26:10 +0800
From:   Baokun Li <libaokun1@...wei.com>
To:     Ye Bin <yebin@...weicloud.com>, <tytso@....edu>,
        <adilger.kernel@...ger.ca>, <linux-ext4@...r.kernel.org>
CC:     <linux-kernel@...r.kernel.org>, <jack@...e.cz>,
        Ye Bin <yebin10@...wei.com>
Subject: Re: [PATCH v4 2/2] ext4: make sure fs error flag setted before clear
 journal error

On 2023/3/1 19:59, Ye Bin wrote:
> From: Ye Bin <yebin10@...wei.com>
>
> Now, jounral error number maybe cleared even though ext4_commit_super()
> failed. This may lead to error flag miss, then fsck will miss to check
> file system deeply.
>
> Signed-off-by: Ye Bin <yebin10@...wei.com>
> Reviewed-by: Jan Kara <jack@...e.cz>


Looks good to me.

Reviewed-by: Baokun Li <libaokun1@...wei.com>


> ---
>   fs/ext4/super.c | 6 ++++--
>   1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/fs/ext4/super.c b/fs/ext4/super.c
> index 9df8fada2dce..7736c96d5a78 100644
> --- a/fs/ext4/super.c
> +++ b/fs/ext4/super.c
> @@ -6152,11 +6152,13 @@ static int ext4_clear_journal_err(struct super_block *sb,
>   		errstr = ext4_decode_error(sb, j_errno, nbuf);
>   		ext4_warning(sb, "Filesystem error recorded "
>   			     "from previous mount: %s", errstr);
> -		ext4_warning(sb, "Marking fs in need of filesystem check.");
>   
>   		EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;
>   		es->s_state |= cpu_to_le16(EXT4_ERROR_FS);
> -		ext4_commit_super(sb);
> +		j_errno = ext4_commit_super(sb);
> +		if (j_errno)
> +			return j_errno;
> +		ext4_warning(sb, "Marked fs in need of filesystem check.");
>   
>   		jbd2_journal_clear_err(journal);
>   		jbd2_journal_update_sb_errno(journal);
-- 
With Best Regards,
Baokun Li
.