linux-ext4 - Re: [PATCH 1/2] ext3: don't update sb journal

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Date:	Sun, 7 Nov 2010 17:09:24 -0800
From:	Maciej Żenczykowski <zenczykowski@...il.com>
To:	linux-ext4@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andreas Dilger <adilger@....com>, Jan Kara <jack@...e.cz>,
	Christoph Hellwig <hch@....de>,
	Eric Sandeen <sandeen@...hat.com>,
	Dmitry Monakhov <dmonakhov@...nvz.org>,
	"Theodore Ts'o" <tytso@....edu>
Cc:	Maciej Żenczykowski <zenczykowski@...il.com>
Subject: Re: [PATCH 1/2] ext3: don't update sb journal_devnum when RO dev

2010/9/26 Maciej Żenczykowski <zenczykowski@...il.com>:
> An ext3 filesystem on a read-only device, with an external journal
> which is at a different device number then recorded in the superblock
> will fail to honor the read-only setting of the device and trigger
> a superblock update (write).
>
> For example:
>  - ext3 on a software raid which is in read-only mode
>  - external journal on a read-write device which has changed device num
>  - attempt to mount with -o journal_dev=<new_number>
>  - hits BUG_ON(mddev->ro = 1) in md.c
>
> Cc: Theodore Ts'o <tytso@....edu>
> Signed-off-by: Maciej Żenczykowski <zenczykowski@...il.com>
> ---
>  fs/ext3/super.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/fs/ext3/super.c b/fs/ext3/super.c
> index 5dbf4db..19dfbe9 100644
> --- a/fs/ext3/super.c
> +++ b/fs/ext3/super.c
> @@ -2299,7 +2299,7 @@ static int ext3_load_journal(struct super_block *sb,
>        EXT3_SB(sb)->s_journal = journal;
>        ext3_clear_journal_err(sb, es);
>
> -       if (journal_devnum &&
> +       if (!really_read_only && journal_devnum &&
>            journal_devnum != le32_to_cpu(es->s_journal_dev)) {
>                es->s_journal_dev = cpu_to_le32(journal_devnum);
>
> --
> 1.7.2.3
>
>

While I can see the ext4 patch at:

 http://git.kernel.org/?p=linux/kernel/git/tytso/ext4.git;a=shortlog

I can't find the ext3 patch.  Did it get missed?

Maciej
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