[Qemu-devel] [RFC 0/6] converting some of virtio to VMState

[Dr. David Alan Gilbert (git)]

From: "Dr. David Alan Gilbert" <address@hidden>

Hi,
  This series converts two parts of virtio to VMState - the
device load/save for virtio-balloon and virtio-net.

It's only been smoke tested (which it passes); but if anyone
has a good suggestion for testing virtio-net migration
I'd be greatful.

The first couple of patches are just general error reporting improvements
for vmstate; and could go in straight away.
The 3rd adds a new vmstate macro for skipping chunks of input data

The 4th wires in a call to vmstate_{load|save}_state in virtio_{load|save}
calling the vmsd on virtio device class; this is instead of the current 
->load/->save
methods.  The idea is that eventually I'll be able to kill off the 
->load/->save.
Also my intention is to add the recursion into vdc->vmsd into the main 
vmstate_virtio
vmsd via some new macro I've not figured out yet.

The meat is in the 5th and 6th patches that do balloon and virtio-net.

My plan is to attack virtio_blk and virtio_serial_bus next; both of which
have loops walking along lists (in subtly different ways); I intend
to see how Jianjun Duan's loop migration code would fit with those and
try and come up with something general that does at least all 3 cases.

Dave

Dr. David Alan Gilbert (6):
  migration: report an error giving the failed field
  migration: Report values for comparisons
  migration: Add VMSTATE_UNUSED_VARRAY_UINT32
  virtio/migration: Add VMStateDescription to VirtioDeviceClass
  virtio/migration: Migrate balloon to VMState
  virtio/migration: Migrate virtio-net to VMState

 hw/net/virtio-net.c            | 256 ++++++++++++++++++++++++-----------------
 hw/virtio/virtio-balloon.c     |  31 +++--
 hw/virtio/virtio.c             |  11 ++
 include/hw/virtio/virtio-net.h |  10 +-
 include/hw/virtio/virtio.h     |   2 +
 include/migration/vmstate.h    |  11 ++
 migration/vmstate.c            |  10 ++
 7 files changed, 206 insertions(+), 125 deletions(-)

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2.7.4