[libvirt] [PATCH 02/11] qemu: Use switch in qemuDomainDefValidateFeatures()

[Andrea Bolognani]

The compiler can make sure we are handling all features.

While reworking the logic, also change error messages to a more
consistent style.

Signed-off-by: Andrea Bolognani <abologna at redhat.com>
---
 src/libvirt_private.syms |  2 ++
 src/qemu/qemu_domain.c   | 57 ++++++++++++++++++++++++++++++++++++------------
 2 files changed, 45 insertions(+), 14 deletions(-)

diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 0bce0bbfb..17c3b71e0 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -345,6 +345,8 @@ virDomainDiskSetDriver;
 virDomainDiskSetFormat;
 virDomainDiskSetSource;
 virDomainDiskSetType;
+virDomainFeatureTypeFromString;
+virDomainFeatureTypeToString;
 virDomainFSDefFree;
 virDomainFSDefNew;
 virDomainFSIndexByName;
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 27a4751e9..dd36b42eb 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -3226,21 +3226,50 @@ qemuDomainDefGetVcpuHotplugGranularity(const virDomainDef *def)
 static int
 qemuDomainDefValidateFeatures(const virDomainDef *def)
 {
-    if (def->features[VIR_DOMAIN_FEATURE_IOAPIC] == VIR_TRISTATE_SWITCH_ON &&
-        !ARCH_IS_X86(def->os.arch)) {
-        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
-                       _("I/O APIC tuning is not supported "
-                         "for '%s' architecture"),
-                       virArchToString(def->os.arch));
-        return -1;
-    }
+    size_t i;
 
-    if (def->features[VIR_DOMAIN_FEATURE_HPT] == VIR_TRISTATE_SWITCH_ON &&
-        !qemuDomainIsPSeries(def)) {
-        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
-                       "%s",
-                       _("HPT tuning is only supported for pSeries guests"));
-        return -1;
+    for (i = 0; i < VIR_DOMAIN_FEATURE_LAST; i++) {
+        const char *featureName = virDomainFeatureTypeToString(i);
+
+        switch ((virDomainFeature) i) {
+        case VIR_DOMAIN_FEATURE_IOAPIC:
+            if (def->features[i] == VIR_TRISTATE_SWITCH_ON &&
+                !ARCH_IS_X86(def->os.arch)) {
+                virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+                               _("The '%s' feature is only supported for %s guests"),
+                               featureName, "x86");
+                return -1;
+            }
+            break;
+
+        case VIR_DOMAIN_FEATURE_HPT:
+            if (def->features[i] == VIR_TRISTATE_SWITCH_ON &&
+                !qemuDomainIsPSeries(def)) {
+                virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+                               _("The '%s' feature is only supported for %s guests"),
+                               featureName, "pSeries");
+                return -1;
+            }
+            break;
+
+        case VIR_DOMAIN_FEATURE_ACPI:
+        case VIR_DOMAIN_FEATURE_APIC:
+        case VIR_DOMAIN_FEATURE_PAE:
+        case VIR_DOMAIN_FEATURE_HAP:
+        case VIR_DOMAIN_FEATURE_VIRIDIAN:
+        case VIR_DOMAIN_FEATURE_PRIVNET:
+        case VIR_DOMAIN_FEATURE_HYPERV:
+        case VIR_DOMAIN_FEATURE_KVM:
+        case VIR_DOMAIN_FEATURE_PVSPINLOCK:
+        case VIR_DOMAIN_FEATURE_CAPABILITIES:
+        case VIR_DOMAIN_FEATURE_PMU:
+        case VIR_DOMAIN_FEATURE_VMPORT:
+        case VIR_DOMAIN_FEATURE_GIC:
+        case VIR_DOMAIN_FEATURE_SMM:
+        case VIR_DOMAIN_FEATURE_VMCOREINFO:
+        case VIR_DOMAIN_FEATURE_LAST:
+            break;
+        }
     }
 
     return 0;
-- 
2.14.3