[libvirt] [PATCH v3 0/3] Alter qemu live/cold device attach algorithm

v2: https://www.redhat.com/archives/libvir-list/2018-July/msg00361.html Differences to v2: Patch1: NEW - As a result of code review the suggestion was to utilize the virDomainDefCompatibleDevice in order to make the check more generic to include <disk>'s which were also afflicted with the same problem that I was trying to solve with the former patch1 just for <hostdev>'s. However, this led me down into the abyss of more changes since <disk>'s have multiple <address type='drive'...> target bus types (IDE and SCSI). That means we need to have a mechanism to pass the target bus along so that a SCSI drive address doesn't inadvertently match an IDE drive address. All that is complicated by the way virDomainDefHasDeviceAddress iterates through all the device lists. Whether there are more similar devices I'm assuming will fall out of code review. Patch2: This moves the virDomainDefHasDeviceAddress into the more common config checking virDomainDefCompatibleDevice method, but now needs to also account for the disk bus issue. This theoretically could be combined with Patch1, but keeping them separate I would hope makes for simpler code review. I could also move code out of virDomainDefHasDeviceAddressIterator into patch2, but if just felt better in patch1. Patch3: No changes were made (amazingly so). In the end quite a bit more complicated John Ferlan (3): conf: Add @target_bus to virDomainDefHasDeviceAddress qemu: Check for existing address when cold attach device qemu: Use the correct vm def on cold attach src/conf/domain_conf.c | 54 +++++++++++++++++++++++++++++++++++--- src/conf/domain_conf.h | 3 ++- src/qemu/qemu_driver.c | 59 ++++++++++++++++-------------------------- 3 files changed, 75 insertions(+), 41 deletions(-) -- 2.17.1