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From: "Pavel Dovgalyuk" <dovgaluk@ispras.ru>
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Date: Mon, 27 Feb 2017 15:07:35 +0300
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Subject: Re: [Qemu-devel] [PATCH 1/3] block: implement bdrv_snapshot_goto
 for blkreplay
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To: 'Kevin Wolf' <kwolf@redhat.com>, 'Pavel Dovgalyuk' <pavel.dovgaluk@ispras.ru>
Cc: qemu-devel@nongnu.org, pbonzini@redhat.com, qemu-block@nongnu.org, mreitz@redhat.com

> From: Kevin Wolf [mailto:kwolf@redhat.com]
> Am 31.01.2017 um 12:57 hat Pavel Dovgalyuk geschrieben:
> > This patch enables making snapshots with blkreplay used in
> > block devices.
> >
> > Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
> 
> Specifically, I think it avoids the blkreplay_open/close sequence. Is
> this what is needed to make it work?

Then I'll need to implement bdrv_open, because there is only bdrv_file_open
for blkreplay now.

Which way is better?

> We should probably mention in the commit message the exact reason why
> implementing .bdrv_snapshot_goto, but not the other snapshot related
> callbacks, fixes things. If you confirm my assumption, I can add that
> while applying.

Pavel Dovgalyuk