[PATCH v2 3/6] hyperv: implement domainGetVcpusFlags

[Matt Coleman <mcoleman@xxxxxxxxx>]

Co-authored-by: Sri Ramanujam <sramanujam@xxxxxxxxx>
Signed-off-by: Matt Coleman <matt@xxxxxxxxx>
---
 src/hyperv/hyperv_driver.c | 52 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/src/hyperv/hyperv_driver.c b/src/hyperv/hyperv_driver.c
index 56d6da80e0..3c436d9465 100644
--- a/src/hyperv/hyperv_driver.c
+++ b/src/hyperv/hyperv_driver.c
@@ -1078,6 +1078,57 @@ hypervDomainGetState(virDomainPtr domain, int *state, int *reason,
 }
 
 
+static int
+hypervDomainGetVcpusFlags(virDomainPtr domain, unsigned int flags)
+{
+    int result = -1;
+    char uuid_string[VIR_UUID_STRING_BUFLEN];
+    hypervPrivate *priv = domain->conn->privateData;
+    Msvm_ComputerSystem *computerSystem = NULL;
+    Msvm_ProcessorSettingData *proc_sd = NULL;
+    Msvm_VirtualSystemSettingData *vssd = NULL;
+
+    virCheckFlags(VIR_DOMAIN_VCPU_LIVE |
+                  VIR_DOMAIN_VCPU_CONFIG |
+                  VIR_DOMAIN_VCPU_MAXIMUM, -1);
+
+    virUUIDFormat(domain->uuid, uuid_string);
+
+    /* Start by getting the Msvm_ComputerSystem */
+    if (hypervMsvmComputerSystemFromDomain(domain, &computerSystem) < 0)
+        goto cleanup;
+
+    /* Check @flags to see if we are to query a running domain, and fail
+     * if that domain is not running */
+    if (flags & VIR_DOMAIN_VCPU_LIVE &&
+        computerSystem->data->EnabledState != MSVM_COMPUTERSYSTEM_ENABLEDSTATE_ENABLED) {
+        virReportError(VIR_ERR_OPERATION_INVALID, "%s", _("Domain is not active"));
+        goto cleanup;
+    }
+
+    /* Check @flags to see if we are to return the maximum vCPU limit */
+    if (flags & VIR_DOMAIN_VCPU_MAXIMUM) {
+        result = hypervConnectGetMaxVcpus(domain->conn, NULL);
+        goto cleanup;
+    }
+
+    if (hypervGetMsvmVirtualSystemSettingDataFromUUID(priv, uuid_string, &vssd) < 0)
+        goto cleanup;
+
+    if (hypervGetProcessorSD(priv, vssd->data->InstanceID, &proc_sd) < 0)
+        goto cleanup;
+
+    result = proc_sd->data->VirtualQuantity;
+
+ cleanup:
+    hypervFreeObject(priv, (hypervObject *)computerSystem);
+    hypervFreeObject(priv, (hypervObject *)vssd);
+    hypervFreeObject(priv, (hypervObject *)proc_sd);
+
+    return result;
+}
+
+
 static int
 hypervDomainGetVcpus(virDomainPtr domain,
                      virVcpuInfoPtr info,
@@ -1930,6 +1981,7 @@ static virHypervisorDriver hypervHypervisorDriver = {
     .domainSetMemoryFlags = hypervDomainSetMemoryFlags, /* 3.6.0 */
     .domainGetInfo = hypervDomainGetInfo, /* 0.9.5 */
     .domainGetState = hypervDomainGetState, /* 0.9.5 */
+    .domainGetVcpusFlags = hypervDomainGetVcpusFlags, /* 6.10.0 */
     .domainGetVcpus = hypervDomainGetVcpus, /* 6.10.0 */
     .domainGetXMLDesc = hypervDomainGetXMLDesc, /* 0.9.5 */
     .connectListDefinedDomains = hypervConnectListDefinedDomains, /* 0.9.5 */
-- 
2.27.0