linux-ext4 - Re: [PATCH v3 3/4] jbd2: make sure ESHUTDOWN to be recorded in the journal superblock

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Message-ID: <20191204170528.GH8206@quack2.suse.cz>
Date:   Wed, 4 Dec 2019 18:05:28 +0100
From:   Jan Kara <jack@...e.cz>
To:     "zhangyi (F)" <yi.zhang@...wei.com>
Cc:     linux-ext4@...r.kernel.org, jack@...e.com, tytso@....edu,
        adilger.kernel@...ger.ca, liangyun2@...wei.com,
        luoshijie1@...wei.com
Subject: Re: [PATCH v3 3/4] jbd2: make sure ESHUTDOWN to be recorded in the
 journal superblock

On Wed 04-12-19 20:46:13, zhangyi (F) wrote:
> Commit fb7c02445c49 ("ext4: pass -ESHUTDOWN code to jbd2 layer") want
> to allow jbd2 layer to distinguish shutdown journal abort from other
> error cases. So the ESHUTDOWN should be taken precedence over any other
> errno which has already been recoded after EXT4_FLAGS_SHUTDOWN is set,
> but it only update errno in the journal suoerblock now if the old errno
> is 0.
> 
> Fixes: fb7c02445c49 ("ext4: pass -ESHUTDOWN code to jbd2 layer")
> Signed-off-by: zhangyi (F) <yi.zhang@...wei.com>

Yeah, I think this is correct if I understand the logic correctly but I'd
like Ted to have a look at this. Anyway, feel free to add:

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

								Honza

> ---
>  fs/jbd2/journal.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
> index b2d6e7666d0f..93be6e0311da 100644
> --- a/fs/jbd2/journal.c
> +++ b/fs/jbd2/journal.c
> @@ -2109,8 +2109,7 @@ static void __journal_abort_soft (journal_t *journal, int errno)
>  
>  	if (journal->j_flags & JBD2_ABORT) {
>  		write_unlock(&journal->j_state_lock);
> -		if (!old_errno && old_errno != -ESHUTDOWN &&
> -		    errno == -ESHUTDOWN)
> +		if (old_errno != -ESHUTDOWN && errno == -ESHUTDOWN)
>  			jbd2_journal_update_sb_errno(journal);
>  		return;
>  	}
> -- 
> 2.17.2
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR