Re: [libvirt] [PATCH 09/16] Implement migration v3 protocol in QEMU driver

Implement the v3 migration protocol, which has two extra steps, 'begin' on the source host and 'confirm' on the source host. All other methods also gain both input and output cookies to allow bi-directional data passing at all stages. The QEMU peer2peer migration method gains another impl to provide the v3 migration. This finally allows migration cookies to work with tunnelled migration, which is required for Spice seamless migration & the lock manager transfer * src/qemu/qemu_driver.c: Wire up migrate v3 APIs * src/qemu/qemu_migration.c, src/qemu/qemu_migration.h: Add begin & confirm methods, and peer2peer impl of v3 --- src/qemu/qemu_driver.c | 316 +++++++++++++++++++++++++++++++++++++++- src/qemu/qemu_migration.c | 348 +++++++++++++++++++++++++++++++++++++++++++-- src/qemu/qemu_migration.h | 17 ++- 3 files changed, 657 insertions(+), 24 deletions(-)