[libvirt] [PATCHv2 1/3] qemu: Refactor qemuDomainSetVcpusFlags

[Peter Krempa]

This patch changes a switch statement into ifs when handling live vs.
configuration modifications getting rid of redundant code in case when
both live and persistent configuration gets changed.
---
Diff to v1:
- change order of live and config modifications - do the live modification first
---
 src/qemu/qemu_driver.c |   26 +++++++++-----------------
 1 files changed, 9 insertions(+), 17 deletions(-)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index c9e047e..b283c8c 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -3463,33 +3463,25 @@ qemuDomainSetVcpusFlags(virDomainPtr dom, unsigned int nvcpus,
         goto endjob;
     }

-    switch (flags) {
-    case VIR_DOMAIN_AFFECT_CONFIG:
+   if (flags & VIR_DOMAIN_AFFECT_LIVE) {
+        if (qemudDomainHotplugVcpus(driver, vm, nvcpus) < 0)
+            goto endjob;
+    }
+
+    if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
         if (maximum) {
             persistentDef->maxvcpus = nvcpus;
             if (nvcpus < persistentDef->vcpus)
                 persistentDef->vcpus = nvcpus;
         } else {
             persistentDef->vcpus = nvcpus;
         }
-        ret = 0;
-        break;
-
-    case VIR_DOMAIN_AFFECT_LIVE:
-        ret = qemudDomainHotplugVcpus(driver, vm, nvcpus);
-        break;

-    case VIR_DOMAIN_AFFECT_LIVE | VIR_DOMAIN_AFFECT_CONFIG:
-        ret = qemudDomainHotplugVcpus(driver, vm, nvcpus);
-        if (ret == 0) {
-            persistentDef->vcpus = nvcpus;
-        }
-        break;
+        if (virDomainSaveConfig(driver->configDir, persistentDef) < 0)
+            goto endjob;
     }

-    /* Save the persistent config to disk */
-    if (flags & VIR_DOMAIN_AFFECT_CONFIG)
-        ret = virDomainSaveConfig(driver->configDir, persistentDef);
+    ret = 0;

 endjob:
     if (qemuDomainObjEndJob(driver, vm) == 0)
-- 
1.7.3.4