linux-ext4 - Re: [PATCH v3] ext4: Fix bdev write error check failed when mount fs with ro

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Date:   Sat, 3 Oct 2020 01:09:29 -0400
From:   "Theodore Y. Ts'o" <tytso@....edu>
To:     Zhang Xiaoxu <zhangxiaoxu5@...wei.com>
Cc:     yi.zhang@...wei.com, jack@...e.cz, linux-ext4@...r.kernel.org,
        adilger.kernel@...ger.ca
Subject: Re: [PATCH v3] ext4: Fix bdev write error check failed when mount fs
 with ro

On Sun, Sep 27, 2020 at 10:05:56PM -0400, Zhang Xiaoxu wrote:
> Consider a situation when a filesystem was uncleanly shutdown and the
> orphan list is not empty and a read-only mount is attempted. The orphan
> list cleanup during mount will fail with:
> 
> ext4_check_bdev_write_error:193: comm mount: Error while async write back metadata
> 
> This happens because sbi->s_bdev_wb_err is not initialized when mounting
> the filesystem in read only mode and so ext4_check_bdev_write_error()
> falsely triggers.
> 
> Initialize sbi->s_bdev_wb_err unconditionally to avoid this problem.
> 
> Fixes: bc71726c7257 ("ext4: abort the filesystem if failed to async write metadata buffer")
> Signed-off-by: Zhang Xiaoxu <zhangxiaoxu5@...wei.com>
> Reviewed-by: Jan Kara <jack@...e.cz>

Applied, thanks.

				- Ted