qemu: use bdrv_flush_all for vm_stop et al
commit22af08eacf6b5aa0e6c0581e547380b3eb4f95e9
authorJohn Snow <jsnow@redhat.com>
Fri, 23 Sep 2016 01:45:51 +0000 (22 21:45 -0400)
committerKevin Wolf <kwolf@redhat.com>
Thu, 29 Sep 2016 12:13:37 +0000 (29 14:13 +0200)
tree96ed961aa4ea94be347ad9a984509308fd2d5dc2
parent4085f5c7a239567a292876f46cb59d9b19bcf6ac
qemu: use bdrv_flush_all for vm_stop et al

Reimplement bdrv_flush_all for vm_stop. In contrast to blk_flush_all,
bdrv_flush_all does not have device model restrictions. This allows
us to flush and halt unconditionally without error.

This allows us to do things like migrate when we have a device with
an open tray, but has a node that may need to be flushed, or nodes
that aren't currently attached to any device and need to be flushed.

Specifically, this allows us to migrate when we have a CDROM with
an open tray.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Acked-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
cpus.c