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Re: [PATCH 09/17] common/dmerror: fix mount option issues

To: Eryu Guan <eguan@xxxxxxxxxx>
Subject: Re: [PATCH 09/17] common/dmerror: fix mount option issues
From: "Darrick J. Wong" <darrick.wong@xxxxxxxxxx>
Date: Wed, 3 Aug 2016 15:14:01 -0700
Cc: david@xxxxxxxxxxxxx, linux-btrfs@xxxxxxxxxxxxxxx, fstests@xxxxxxxxxxxxxxx, xfs@xxxxxxxxxxx
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <20160803103800.GO27776@xxxxxxxxxxxxxxxxxxxxxxxx>
References: <146914477514.11762.3144320628851923350.stgit@xxxxxxxxxxxxxxxx> <146914483353.11762.14647880235199676753.stgit@xxxxxxxxxxxxxxxx> <20160803103800.GO27776@xxxxxxxxxxxxxxxxxxxxxxxx>
User-agent: Mutt/1.5.24 (2015-08-30)
On Wed, Aug 03, 2016 at 06:38:00PM +0800, Eryu Guan wrote:
> On Thu, Jul 21, 2016 at 04:47:13PM -0700, Darrick J. Wong wrote:
> > Calling _mount doesn't work when we want to add mount options
> > such as realtime devices.  Since it's just a normal scratch device
> > mount except for the source device, just call _scratch_mount with
> > SCRATCH_DEV set to the dmerror device.
> > 
> > Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
> > ---
> >  common/dmerror |    7 +------
> >  1 file changed, 1 insertion(+), 6 deletions(-)
> > 
> > 
> > diff --git a/common/dmerror b/common/dmerror
> > index 5ad9994..22b9ea9 100644
> > --- a/common/dmerror
> > +++ b/common/dmerror
> > @@ -41,14 +41,9 @@ _dmerror_init()
> >     DMERROR_TABLE="0 $blk_dev_size error $dm_backing_dev 0"
> >  }
> >  
> > -_dmerror_mount_options()
> > -{
> > -   echo `_common_dev_mount_options $*` $DMERROR_DEV $SCRATCH_MNT
> > -}
> > -
> >  _dmerror_mount()
> >  {
> > -   _mount -t $FSTYP `_dmerror_mount_options $*`
> > +   SCRATCH_DEV=$DMERROR_DEV _scratch_mount $*
> 
> Perhaps you can add "_scratch_options mount" to _dmerror_mount then
> mount with $SCRATCH_OPTIONS? Like what _mount_delay does in
> common/dmdelay.

Oh, yeah, that makes sense.

--D

> 
> Thanks,
> Eryu
> 
> >  }
> >  
> >  _dmerror_unmount()
> > 

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