[PATCH 09/16] qemu_validate: Check if QEMU's capable of setting iothread pool size

[Michal Privoznik <mprivozn@xxxxxxxxxx>]

Now that we have a capability that reflects whether QEMU is
capable of setting iothread pool size, let's introduce a
validator check to make sure users are not trying to use this
feature with QEMU that doesn't support it.

Signed-off-by: Michal Privoznik <mprivozn@xxxxxxxxxx>
---
 src/qemu/qemu_validate.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/src/qemu/qemu_validate.c b/src/qemu/qemu_validate.c
index 9b6245e6d7..21b3407b2f 100644
--- a/src/qemu/qemu_validate.c
+++ b/src/qemu/qemu_validate.c
@@ -384,6 +384,27 @@ qemuValidateDomainDefCpu(virQEMUDriver *driver,
 }
 
 
+static int
+qemuValidateDomainDefIOThreads(const virDomainDef *def,
+                               virQEMUCaps *qemuCaps)
+{
+    size_t i;
+
+    for (i = 0; i < def->niothreadids; i++) {
+        virDomainIOThreadIDDef *iothread = def->iothreadids[i];
+
+        if ((iothread->pool_min != -1 || iothread->pool_max != -1) &&
+            !virQEMUCapsGet(qemuCaps, QEMU_CAPS_IOTHREAD_THREAD_POOL_MAX)) {
+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                           _("pool_min and pool_max is not supported by this QEMU binary"));
+            return -1;
+        }
+    }
+
+    return 0;
+}
+
+
 static int
 qemuValidateDomainDefClockTimers(const virDomainDef *def,
                                  virQEMUCaps *qemuCaps)
@@ -1168,6 +1189,9 @@ qemuValidateDomainDef(const virDomainDef *def,
     if (qemuDomainDefValidateMemoryHotplug(def, NULL) < 0)
         return -1;
 
+    if (qemuValidateDomainDefIOThreads(def, qemuCaps) < 0)
+        return -1;
+
     if (qemuValidateDomainDefClockTimers(def, qemuCaps) < 0)
         return -1;
 
-- 
2.35.1