[libvirt] [PATCHv4 04/15] qemu: support migration to fd
Daniel P. Berrange
berrange at redhat.com
Thu Mar 10 12:01:31 UTC 2011
On Wed, Mar 09, 2011 at 06:45:44PM -0700, Eric Blake wrote:
> * src/qemu/qemu_monitor.h (qemuMonitorMigrateToFd): New
> prototype.
> * src/qemu/qemu_monitor.c (qemuMonitorMigrateToFd): New function.
> ---
> src/qemu/qemu_monitor.c | 31 +++++++++++++++++++++++++++++++
> src/qemu/qemu_monitor.h | 4 ++++
> 2 files changed, 35 insertions(+), 0 deletions(-)
ACK
>
> diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
> index 765a1ae..1e79523 100644
> --- a/src/qemu/qemu_monitor.c
> +++ b/src/qemu/qemu_monitor.c
> @@ -1384,6 +1384,37 @@ int qemuMonitorGetMigrationStatus(qemuMonitorPtr mon,
> }
>
>
> +int qemuMonitorMigrateToFd(qemuMonitorPtr mon,
> + unsigned int flags,
> + int fd)
> +{
> + int ret;
> + VIR_DEBUG("mon=%p fd=%d flags=%u",
> + mon, fd, flags);
> +
> + if (!mon) {
> + qemuReportError(VIR_ERR_INVALID_ARG, "%s",
> + _("monitor must not be NULL"));
> + return -1;
> + }
> +
> + if (qemuMonitorSendFileHandle(mon, "migrate", fd) < 0)
> + return -1;
> +
> + if (mon->json)
> + ret = qemuMonitorJSONMigrate(mon, flags, "fd:migrate");
> + else
> + ret = qemuMonitorTextMigrate(mon, flags, "fd:migrate");
> +
> + if (ret < 0) {
> + if (qemuMonitorCloseFileHandle(mon, "migrate") < 0)
> + VIR_WARN0("failed to close migration handle");
> + }
> +
> + return ret;
> +}
It is a nice idea todo the SendFileHAndle/CloseFileHandle
calls from here, rather than in the qemu_driver code
itself. It makes the latter much clearer - we should think
about whether it makes sense to rewrite the NIC hotplug
code to work this way too.
Daniel
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