Previously posted series patches: http://lists.nongnu.org/archive/html/qemu-devel/2017-01/msg00320.html http://lists.nongnu.org/archive/html/qemu-devel/2016-12/msg02391.html http://lists.nongnu.org/archive/html/qemu-devel/2016-12/msg02062.html
This series adds a new command line option "--only-migratable" which will only allow addition of those devices to a QEMU instance which are migratable and do not abruptly fail QEMU after migration. Patch 1 adds the new option "-only-migratable". Patch 2 adds compatibility for various "device adding" options for both via command line and hotplug methods. Patch 3 helps to fail the migration blocker if the migration is already in progress and thus cannot be blocked. Note: This patch was originally written by John Snow and I have only made few changes. Patch 4 handles the special case of devices which become unmigratable dynamically by making call to "migrate_add_blocker". Here we fail the particular action of the device which results in an unmigratable VM. Eg: 9pfs fails to mount the filesystem. Note: I have not been able to test and compile the ARM drivers for KVM. They are: hw/intc/arm_gic_kvm.c hw/intc/arm_gicv3_its_kvm.c hw/intc/arm_gicv3_kvm.c Changes in v4: - drop diff in 9pfs for patch 4/4 - call clunk_fid() after freeing migration_blocker - drop ret and use err directly Changes in v3: - set s->root_fid after migrate_add_blocker - free migration_blocker inside v9fs_attach() - change back ret<0 to just ret - free local_err Changes in v2: - change the documentation for the new option - add a NULL check for ObjectClass - break patch 3 into patch 3 and 4 - use error_append_hint - return -EACCES for only-migratable - fix the error messages Ashijeet Acharya (4): migration: Add a new option to enable only-migratable migration: Allow "device add" options to only add migratable devices migration: disallow migrate_add_blocker during migration migration: Fail migration blocker for --only-migratble block/qcow.c | 9 ++++++++- block/vdi.c | 9 ++++++++- block/vhdx.c | 18 ++++++++++++------ block/vmdk.c | 10 +++++++++- block/vpc.c | 13 ++++++++++--- block/vvfat.c | 22 ++++++++++++++-------- hw/9pfs/9p.c | 18 +++++++++++++----- hw/display/virtio-gpu.c | 34 +++++++++++++++++++++------------- hw/intc/arm_gic_kvm.c | 19 +++++++++++++------ hw/intc/arm_gicv3_its_kvm.c | 21 ++++++++++++++------- hw/intc/arm_gicv3_kvm.c | 22 +++++++++++++++------- hw/misc/ivshmem.c | 17 +++++++++++++---- hw/scsi/vhost-scsi.c | 27 +++++++++++++++++++++------ hw/usb/bus.c | 18 ++++++++++++++++++ hw/virtio/vhost.c | 10 +++++++++- include/migration/migration.h | 9 ++++++++- migration/migration.c | 42 ++++++++++++++++++++++++++++++++++++++++-- qdev-monitor.c | 9 +++++++++ qemu-options.hx | 9 +++++++++ stubs/migr-blocker.c | 3 ++- target-i386/kvm.c | 19 ++++++++++++++++--- vl.c | 4 ++++ 22 files changed, 286 insertions(+), 76 deletions(-) -- 2.6.2
