Currently device hotplug removal code is tied to device removal via
ACPI. All pci devices that are removable via device_del() require the
guest to respond to the request. In some cases the guest may not
respond leaving the device still accessible to the guest. The management
layer doesn't currently have a reliable way to revoke access to host
resource in the presence of an uncooperative guest.
This patch implements a new monitor command, drive_del, which
provides an explicit command to revoke access to a host block device.
drive_del first quiesces the block device (qemu_aio_flush;
bdrv_flush() and bdrv_close()). This prevents further IO from being
submitted against the host device. Finally, drive_del cleans up
pointers between the drive object (host resource) and the device
object (guest resource).
Signed-off-by: Ryan Harper <ryanh@us.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Clarify default value of MB in migration speed argument in monitor, if
no suffix is specified. This differ from previous default of bytes,
but is consistent with the rest of the places where we accept a size
argument.
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Let's be consistent and call it hmp-commands.hx, so that we have
qmp-commands.hx for QMP and hmp-commands.hx for HMP.
Please, note that this commit doesn't touch qemu-monitor.texi. All
texi files have the qemu- prefix and I don't think it's worth
changing that.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Ryan Harper