cputune_event: queue the event for cputune updates

Now we have universal tunable event so we can use it for reporting
changes to user. The cputune values will be prefixed with "cputune" to
distinguish it from other tunable events.
Signed-off-by: NPavel Hrdina <phrdina@redhat.com>

include/libvirt/libvirt.h.in

@@ -5203,6 +5203,66 @@ typedef void (*virConnectDomainEventDeviceRemovedCallback)(virConnectPtr conn,
                                                            const char *devAlias,
                                                            void *opaque);
 
+/**
+ * VIR_DOMAIN_EVENT_CPUTUNE_VCPUPIN:
+ *
+ * Macro represents formatted pinning for one vcpu specified by id which is
+ * appended to the parameter name, for example "cputune.vcpupin1",
+ * as VIR_TYPED_PARAM_STRING.
+ */
+#define VIR_DOMAIN_EVENT_CPUTUNE_VCPUPIN "cputune.vcpupin%u"
+
+/**
+ * VIR_DOMAIN_EVENT_CPUTUNE_EMULATORIN:
+ *
+ * Macro represents formatted pinning for emulator process,
+ * as VIR_TYPED_PARAM_STRING.
+ */
+#define VIR_DOMAIN_EVENT_CPUTUNE_EMULATORIN "cputune.emulatorpin"
+
+/**
+ * VIR_DOMAIN_EVENT_CPUTUNE_CPU_SHARES:
+ *
+ * Macro represents proportional weight of the scheduler used on the
+ * host cpu, when using the posix scheduler, as VIR_TYPED_PARAM_ULLONG.
+ */
+#define VIR_DOMAIN_EVENT_CPUTUNE_CPU_SHARES "cputune.cpu_shares"
+
+/**
+ * VIR_DOMAIN_EVENT_CPUTUNE_VCPU_PERIOD:
+ *
+ * Macro represents the enforcement period for a quota, in microseconds,
+ * for vcpus only, when using the posix scheduler, as VIR_TYPED_PARAM_ULLONG.
+ */
+#define VIR_DOMAIN_EVENT_CPUTUNE_VCPU_PERIOD "cputune.vcpu_period"
+
+/**
+ * VIR_DOMAIN_EVENT_CPUTUNE_VCPU_QUOTA:
+ *
+ * Macro represents the maximum bandwidth to be used within a period for
+ * vcpus only, when using the posix scheduler, as VIR_TYPED_PARAM_LLONG.
+ */
+#define VIR_DOMAIN_EVENT_CPUTUNE_VCPU_QUOTA "cputune.vcpu_quota"
+
+/**
+ * VIR_DOMAIN_EVENT_CPUTUNE_EMULATOR_PERIOD:
+ *
+ * Macro represents the enforcement period for a quota in microseconds,
+ * when using the posix scheduler, for all emulator activity not tied to
+ * vcpus, as VIR_TYPED_PARAM_ULLONG.
+ */
+#define VIR_DOMAIN_EVENT_CPUTUNE_EMULATOR_PERIOD "cputune.emulator_period"
+
+/**
+ * VIR_DOMAIN_EVENT_CPUTUNE_EMULATOR_QUOTA:
+ *
+ * Macro represents the maximum bandwidth to be used within a period for
+ * all emulator activity not tied to vcpus, when using the posix scheduler,
+ * as an VIR_TYPED_PARAM_LLONG.
+ */
+#define VIR_DOMAIN_EVENT_CPUTUNE_EMULATOR_QUOTA "cputune.emulator_quota"
+
+
 /**
  * virConnectDomainEventTunableCallback:
  * @conn: connection object
@@ -5215,6 +5275,9 @@ typedef void (*virConnectDomainEventDeviceRemovedCallback)(virConnectPtr conn,
  * be freed in the callback handler as it's done internally after the callback
  * handler is executed.
  *
+ * Currently supported name spaces:
+ *  "cputune.*"
+ *
  * The callback signature to use when registering for an event of type
  * VIR_DOMAIN_EVENT_ID_TUNABLE with virConnectDomainEventRegisterAny()
  */

src/qemu/qemu_cgroup.c

@@ -34,6 +34,7 @@
 #include "virscsi.h"
 #include "virstring.h"
 #include "virfile.h"
+#include "virtypedparam.h"
 
 #define VIR_FROM_THIS VIR_FROM_QEMU
 
@@ -676,6 +677,10 @@ static int
 qemuSetupCpuCgroup(virDomainObjPtr vm)
 {
     qemuDomainObjPrivatePtr priv = vm->privateData;
+    virObjectEventPtr event = NULL;
+    virTypedParameterPtr eventParams = NULL;
+    int eventNparams = 0;
+    int eventMaxparams = 0;
 
     if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPU)) {
        if (vm->def->cputune.sharesSpecified) {
@@ -694,7 +699,19 @@ qemuSetupCpuCgroup(virDomainObjPtr vm)
 
         if (virCgroupGetCpuShares(priv->cgroup, &val) < 0)
             return -1;
-        vm->def->cputune.shares = val;
+        if (vm->def->cputune.shares != val) {
+            vm->def->cputune.shares = val;
+            if (virTypedParamsAddULLong(&eventParams, &eventNparams,
+                                        &eventMaxparams,
+                                        VIR_DOMAIN_EVENT_CPUTUNE_CPU_SHARES,
+                                        val) < 0)
+                return -1;
+
+            event = virDomainEventTunableNewFromObj(vm, eventParams, eventNparams);
+        }
+
+        if (event)
+            qemuDomainEventQueue(vm->privateData, event);
     }
 
     return 0;

src/qemu/qemu_driver.c

@@ -4538,6 +4538,12 @@ qemuDomainPinVcpuFlags(virDomainPtr dom,
     virBitmapPtr pcpumap = NULL;
     virQEMUDriverConfigPtr cfg = NULL;
     virCapsPtr caps = NULL;
+    virObjectEventPtr event = NULL;
+    char paramField[VIR_TYPED_PARAM_FIELD_LENGTH] = "";
+    char *str = NULL;
+    virTypedParameterPtr eventParams = NULL;
+    int eventNparams = 0;
+    int eventMaxparams = 0;
 
     virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
                   VIR_DOMAIN_AFFECT_CONFIG, -1);
@@ -4645,6 +4651,18 @@ qemuDomainPinVcpuFlags(virDomainPtr dom,
 
         if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm) < 0)
             goto cleanup;
+
+        if (snprintf(paramField, VIR_TYPED_PARAM_FIELD_LENGTH,
+                     VIR_DOMAIN_EVENT_CPUTUNE_VCPUPIN, vcpu) < 0) {
+            goto cleanup;
+        }
+
+        str = virBitmapFormat(pcpumap);
+        if (virTypedParamsAddString(&eventParams, &eventNparams,
+                                    &eventMaxparams, paramField, str) < 0)
+            goto cleanup;
+
+        event = virDomainEventTunableNewFromDom(dom, eventParams, eventNparams);
     }
 
     if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
@@ -4680,6 +4698,9 @@ qemuDomainPinVcpuFlags(virDomainPtr dom,
         virCgroupFree(&cgroup_vcpu);
     if (vm)
         virObjectUnlock(vm);
+    if (event)
+        qemuDomainEventQueue(driver, event);
+    VIR_FREE(str);
     virBitmapFree(pcpumap);
     virObjectUnref(caps);
     virObjectUnref(cfg);
@@ -4804,6 +4825,12 @@ qemuDomainPinEmulator(virDomainPtr dom,
     virBitmapPtr pcpumap = NULL;
     virQEMUDriverConfigPtr cfg = NULL;
     virCapsPtr caps = NULL;
+    virObjectEventPtr event = NULL;
+    char * str = NULL;
+    virTypedParameterPtr eventParams = NULL;
+    int eventNparams = 0;
+    int eventMaxparams = 0;
+
 
     virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
                   VIR_DOMAIN_AFFECT_CONFIG, -1);
@@ -4909,6 +4936,15 @@ qemuDomainPinEmulator(virDomainPtr dom,
 
         if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm) < 0)
             goto cleanup;
+
+        str = virBitmapFormat(pcpumap);
+        if (virTypedParamsAddString(&eventParams, &eventNparams,
+                                    &eventMaxparams,
+                                    VIR_DOMAIN_EVENT_CPUTUNE_EMULATORIN,
+                                    str) < 0)
+            goto cleanup;
+
+        event = virDomainEventTunableNewFromDom(dom, eventParams, eventNparams);
     }
 
     if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
@@ -4938,6 +4974,9 @@ qemuDomainPinEmulator(virDomainPtr dom,
  cleanup:
     if (cgroup_emulator)
         virCgroupFree(&cgroup_emulator);
+    if (event)
+        qemuDomainEventQueue(driver, event);
+    VIR_FREE(str);
     virBitmapFree(pcpumap);
     virObjectUnref(caps);
     if (vm)
@@ -9202,6 +9241,10 @@ qemuDomainSetSchedulerParametersFlags(virDomainPtr dom,
     virQEMUDriverConfigPtr cfg = NULL;
     virCapsPtr caps = NULL;
     qemuDomainObjPrivatePtr priv;
+    virObjectEventPtr event = NULL;
+    virTypedParameterPtr eventParams = NULL;
+    int eventNparams = 0;
+    int eventMaxNparams = 0;
 
     virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
                   VIR_DOMAIN_AFFECT_CONFIG, -1);
@@ -9272,6 +9315,12 @@ qemuDomainSetSchedulerParametersFlags(virDomainPtr dom,
 
                 vm->def->cputune.shares = val;
                 vm->def->cputune.sharesSpecified = true;
+
+                if (virTypedParamsAddULLong(&eventParams, &eventNparams,
+                                            &eventMaxNparams,
+                                            VIR_DOMAIN_EVENT_CPUTUNE_CPU_SHARES,
+                                            val) < 0)
+                    goto cleanup;
             }
 
             if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
@@ -9289,6 +9338,12 @@ qemuDomainSetSchedulerParametersFlags(virDomainPtr dom,
                     goto cleanup;
 
                 vm->def->cputune.period = value_ul;
+
+                if (virTypedParamsAddULLong(&eventParams, &eventNparams,
+                                            &eventMaxNparams,
+                                            VIR_DOMAIN_EVENT_CPUTUNE_VCPU_PERIOD,
+                                            value_ul) < 0)
+                    goto cleanup;
             }
 
             if (flags & VIR_DOMAIN_AFFECT_CONFIG)
@@ -9303,6 +9358,12 @@ qemuDomainSetSchedulerParametersFlags(virDomainPtr dom,
                     goto cleanup;
 
                 vm->def->cputune.quota = value_l;
+
+                if (virTypedParamsAddLLong(&eventParams, &eventNparams,
+                                           &eventMaxNparams,
+                                           VIR_DOMAIN_EVENT_CPUTUNE_VCPU_QUOTA,
+                                           value_l) < 0)
+                    goto cleanup;
             }
 
             if (flags & VIR_DOMAIN_AFFECT_CONFIG)
@@ -9318,6 +9379,12 @@ qemuDomainSetSchedulerParametersFlags(virDomainPtr dom,
                     goto cleanup;
 
                 vm->def->cputune.emulator_period = value_ul;
+
+                if (virTypedParamsAddULLong(&eventParams, &eventNparams,
+                                            &eventMaxNparams,
+                                            VIR_DOMAIN_EVENT_CPUTUNE_EMULATOR_PERIOD,
+                                            value_ul) < 0)
+                    goto cleanup;
             }
 
             if (flags & VIR_DOMAIN_AFFECT_CONFIG)
@@ -9333,6 +9400,12 @@ qemuDomainSetSchedulerParametersFlags(virDomainPtr dom,
                     goto cleanup;
 
                 vm->def->cputune.emulator_quota = value_l;
+
+                if (virTypedParamsAddLLong(&eventParams, &eventNparams,
+                                           &eventMaxNparams,
+                                           VIR_DOMAIN_EVENT_CPUTUNE_EMULATOR_QUOTA,
+                                           value_l) < 0)
+                    goto cleanup;
             }
 
             if (flags & VIR_DOMAIN_AFFECT_CONFIG)
@@ -9343,6 +9416,12 @@ qemuDomainSetSchedulerParametersFlags(virDomainPtr dom,
     if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm) < 0)
         goto cleanup;
 
+    if (eventNparams) {
+        event = virDomainEventTunableNewFromDom(dom, eventParams, eventNparams);
+        eventNparams = 0;
+        if (event)
+            qemuDomainEventQueue(driver, event);
+    }
 
     if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
         rc = virDomainSaveConfig(cfg->configDir, vmdef);
@@ -9359,6 +9438,8 @@ qemuDomainSetSchedulerParametersFlags(virDomainPtr dom,
     virDomainDefFree(vmdef);
     if (vm)
         virObjectUnlock(vm);
+    if (eventNparams)
+        virTypedParamsFree(eventParams, eventNparams);
     virObjectUnref(caps);
     virObjectUnref(cfg);
     return ret;