Re: [PATCH] e2fsck: reopen the file system with saved flags after a journal replay

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On Tue, 8 Jul 2014, Theodore Ts'o wrote:

> Date: Tue, 8 Jul 2014 07:58:27 -0400
> From: Theodore Ts'o <tytso@xxxxxxx>
> To: Lukáš Czerner <lczerner@xxxxxxxxxx>
> Cc: Ext4 Developers List <linux-ext4@xxxxxxxxxxxxxxx>,
>     Андрей Василишин <a.vasilishin@xxxxxx>,
>     Jon Severinsson <jon@xxxxxxxxxxxxxxx>, 744953@xxxxxxxxxxxxxxx
> Subject: Re: [PATCH] e2fsck: reopen the file system with saved flags after a
>     journal replay
> 
> On Tue, Jul 08, 2014 at 11:03:53AM +0200, Lukáš Czerner wrote:
> > > +	ctx->openfs_flags = flags;
> > >  	retval = try_open_fs(ctx, flags, io_ptr, &fs);
> > 
> > Maybe we can get rid of 'flags' argument since it's not needed
> > anymore ?
> 
> Yeah, I thought of that, but I was trying to keep the patch small,
> since I thought this was one that distros might want to cherry pick.

Makes sense.

> 
> > Otherwise the patch looks good, however for some reason I can not
> > reproduce the problem in the big file system (without bigalloc) even
> > though looking at bitmap.c it looks like we really should get that
> > error.
> 
> Ah, yes, in the big file system case we don't hit it because we don't
> actually load the bitmaps before we close and reopen the file system
> again.  But in the bigalloc case, we check and fail at openfs time,
> which aborts the fsck run.
> 
> So we could work around this by moving the bigalloc check to when we
> open the file system, but you want get the other openfs flags right,
> especially the EXT2_FLAG_SKIP_MMP flags.

Yep, I agree with the fix, I was just wondering about the big fs
case. Anyway you can add:

Reviewed-by: Lukas Czerner <lczerner@xxxxxxxxxx>

> 
> Cheers,
> 
> 						- Ted
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