[libvirt] [PATCH 2/4] qemu: Check QEMU_CAPS_OBJECT_IOTHREAD for qemuDomainPinIOThread

[John Ferlan]

https://bugzilla.redhat.com/show_bug.cgi?id=1249981

When trying to pin the thread to the live process in qemuDomainPinIOThread,
there was no check whether the binary supported IOThreads, thus thread_id = 0
(eg current) would be erroneously used.

Follow qemuDomainChgIOThread and only check for the bit if changing
the live definition vs. changing the persistent definition.

Signed-off-by: John Ferlan <jferlan at redhat.com>
---
 src/qemu/qemu_driver.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 8cd5ee3..7308c3b 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -5813,6 +5813,12 @@ qemuDomainPinIOThread(virDomainPtr dom,
         virDomainIOThreadIDDefPtr iothrid;
         virBitmapPtr cpumask;
 
+        if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_OBJECT_IOTHREAD)) {
+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                           _("IOThreads not supported with this binary"));
+            goto endjob;
+        }
+
         if (!(iothrid = virDomainIOThreadIDFind(def, iothread_id))) {
             virReportError(VIR_ERR_INVALID_ARG,
                            _("iothread %d not found"), iothread_id);
-- 
2.1.0