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| H A D | blockdev.c | diff aa398a5c3a4c0fc29baf02aee5283a7fa0f202a3 Wed Jan 18 08:40:50 CST 2012 Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> blockdev: make image streaming safe across hotplug
Unplugging a storage interface like virtio-blk causes the host block
device to be deleted too. Long-running operations like block migration
must take a DriveInfo reference to prevent the BlockDriverState from
being freed. For image streaming we can do the same thing.
Note that it is not possible to acquire/release the drive reference in
block.c where the block job functions live because
drive_get_ref()/drive_put_ref() are blockdev.c functions. Calling them
from block.c would be a layering violation - tools like qemu-img don't
even link against blockdev.c.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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