linux-ext4 - Re: [PATCH] ext3: force ro mount if ext3_setup

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Date:	Tue, 29 May 2012 16:09:16 +0200
From:	Jan Kara <jack@...e.cz>
To:	Andreas Dilger <adilger@...ger.ca>
Cc:	Eric Sandeen <sandeen@...hat.com>,
	ext4 development <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH] ext3: force ro mount if ext3_setup_super() fails

On Thu 24-05-12 11:41:57, Andreas Dilger wrote:
> On 2012-05-24, at 11:00 AM, Eric Sandeen wrote:
> > If ext3_setup_super() fails i.e. due to a too-high revision,
> > the error is logged in dmesg but the fs is not mounted RO as
> > indicated.
> > 
> > Tested by:
> > 
> > # mkfs.ext3 -r 4 /dev/sdb6
> > # mount /dev/sdb6 /mnt/test
> > # dmesg | grep "too high"
> > [164152.114551] EXT3-fs (sdb6): error: revision level too high, forcing read-only mode
> > # grep sdb6 /proc/mounts
> > /dev/sdb6 /mnt/test2 ext3 rw,seclabel,relatime,errors=continue,user_xattr,acl,barrier=1,data=ordered 0 0
> >                          ^^
> > 
> > Signed-off-by: Eric Sandeen <sandeen@...hat.com>
> 
> Reviewed-by: Andreas Dilger <adilger@...mcloud.com>
  Thanks! Merged to my tree.

									Honza

> > ---
> > 
> > diff --git a/fs/ext3/super.c b/fs/ext3/super.c
> > index cf0b592..fef7af2 100644
> > --- a/fs/ext3/super.c
> > +++ b/fs/ext3/super.c
> > @@ -2043,7 +2043,8 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
> > 		goto failed_mount3;
> > 	}
> > 
> > -	ext3_setup_super (sb, es, sb->s_flags & MS_RDONLY);
> > +	if (ext3_setup_super(sb, es, sb->s_flags & MS_RDONLY))
> > +		sb->s_flags |= MS_RDONLY;
> 
> I was wondering if this should be:
> 
> 	sb->s_flags |= ext3_setup_super(...)
> 
> but that might be over-thinking things.
> 
> > 	EXT3_SB(sb)->s_mount_state |= EXT3_ORPHAN_FS;
> > 	ext3_orphan_cleanup(sb, es);
> > 
> > --
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> 
> 
> Cheers, Andreas
> 
> 
> 
> 
> 
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