qemu: propagate iotune settings to all disks in the group

Currently upon successfull call to qemu's implementation of
virDomainSetBlockIoTune iotune settings are changed only for the
disk given in API if the disk is in iotune group while we need
to change the settings for all disks in the group.
Signed-off-by: NNikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>

src/qemu/qemu_driver.c

@@ -19117,6 +19117,26 @@ qemuDomainSetBlockIoTuneDefaults(virDomainBlockIoTuneInfoPtr newinfo,
 }
 
 
+static void
+qemuDomainSetGroupBlockIoTune(virDomainDefPtr def,
+                              virDomainBlockIoTuneInfoPtr iotune)
+{
+    size_t i;
+
+    if (!iotune->group_name)
+        return;
+
+    for (i = 0; i < def->ndisks; i++) {
+        virDomainDiskDefPtr d = def->disks[i];
+
+        if (STREQ_NULLABLE(d->blkdeviotune.group_name, iotune->group_name)) {
+            VIR_FREE(d->blkdeviotune.group_name);
+            virDomainBlockIoTuneInfoCopy(iotune, &d->blkdeviotune);
+        }
+    }
+}
+
+
 static int
 qemuDomainSetBlockIoTune(virDomainPtr dom,
                          const char *path,
@@ -19419,6 +19439,8 @@ qemuDomainSetBlockIoTune(virDomainPtr dom,
         if (virDomainDiskSetBlockIOTune(disk, &info) < 0)
             goto endjob;
 
+        qemuDomainSetGroupBlockIoTune(def, &info);
+
         if (virDomainObjSave(vm, driver->xmlopt, cfg->stateDir) < 0)
             goto endjob;