[Qemu-devel] [PATCH v3 0/4] Re-factor img_create() and add live snapshots

[Jes.Sorensen@redhat.com]

From: Jes Sorensen <Jes.Sorensen@redhat.com>

Hi,

This set of patches re-factors img_create() and moves the core part of
it into block.c so it can be accessed from qemu as well as
qemu-img. The second patch adds basic live snapshots support to the
code, however only snapshots to external QCOW2 images is supported for
now. QED support should be trivial once the QED patches go into
upstream.

The last patch fixes a small gotcha which is present in the old code
as well. Try to catch cases where a user tries to create an image with
itself as the backing file. QEMU does 'interesting' things when you do
this.....

Many thanks to Kevin for his help with block layer internals!

New in v2:
 - Fix error return value in monitor command
 - Clarify help message for command
 - Fix patch conflict against block tree. It's all Stefan's fault :)
   f8feb11f4d76f390dddc5cc5345abf99f7659a78

New in v3:
 - Address issues pointed out by Stefan and Kevin
 - Additional patch to return proper -errno error values on error in
   bdrv_img_create() as suggested by Kevin.

Jes Sorensen (4):
  qemu-img.c: Re-factor img_create()
  Introduce do_snapshot_blkdev() and monitor command to handle it.
  Prevent creating an image with the same filename as backing file
  bdrv_img_create() use proper errno return values

 block.c         |  145 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 block.h         |    4 ++
 blockdev.c      |   62 +++++++++++++++++++++++
 blockdev.h      |    1 +
 hmp-commands.hx |   19 +++++++
 qemu-img.c      |  108 +----------------------------------------
 6 files changed, 233 insertions(+), 106 deletions(-)

-- 
1.7.3.3