Re: [Xen-devel] [PATCH][4] xen: remove TapdiskException when add device

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Fri, Mar 21, 2014 at 02:14:01PM +0800, æä wrote:
> >From a3005f45b578db0c035f03b08714357dcd53d06c Mon Sep 17 00:00:00 2001
> From: Yi Li <peteryili@xxxxxxxxxxx>
> Date: Fri, 21 Mar 2014 14:08:52 +0800
> Subject: [PATCH][4] xen: remove TapdiskException when add device
> 
> using the VmError instead of TapdiskException when add device
> 
> Signed-off-by: Yi Li <peteryili@xxxxxxxxxxx>
> ---
>  tools/python/xen/xend/server/BlktapController.py |    5 +----
>  1 files changed, 1 insertions(+), 4 deletions(-)
> 
> diff --git a/tools/python/xen/xend/server/BlktapController.py
> b/tools/python/xen/xend/server/BlktapController.py
> index 60079eb..c8e5e24 100644
> --- a/tools/python/xen/xend/server/BlktapController.py
> +++ b/tools/python/xen/xend/server/BlktapController.py
> @@ -198,9 +198,6 @@ class Blktap2Controller(BlktapController):
>          self.waitForBackend_destroy(backpath)
>          TapdiskController.destroy(path)
> 
> -class TapdiskException(Exception):
> -    pass
> -
>  class TapdiskController(object):
>      '''class which encapsulates all tapdisk control operations'''
> 
> @@ -229,7 +226,7 @@ class TapdiskController(object):
>          stdout.close()
>          stderr.close()
>          if rc:
> -            raise TapdiskException('%s failed (%s %s %s)' % \
> +            raise VmError('%s failed (%s %s %s)' % \
>                                         (args, rc, out, err))
>          return out
> 

After this change BlktapController raises VmError just as other
controllers do. On the flip side any out-of-tree users of
TapdiskException are broken. Not sure if there's any such user, but it's
probably safe to remove this as the breakage should be easy to spot and
fix, and I doubt that any upper toolstack will dig into Xend code to use
its internal abstraction...

Wei.

> -- 
> 1.7.1

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