qemu: monitor: Extract qemu cpu id along with other data

Storing of the ID will allow simpler extraction of data present only in
query-cpus without the need to call qemuMonitorGetCPUInfo in statistics
paths.

src/qemu/qemu_domain.c

@@ -6318,6 +6318,7 @@ qemuDomainRefreshVcpuInfo(virQEMUDriverPtr driver,
         VIR_FREE(vcpupriv->alias);
         VIR_STEAL_PTR(vcpupriv->alias, info[i].alias);
         vcpupriv->enable_id = info[i].id;
+        vcpupriv->qemu_id = info[i].qemu_id;
 
         if (hotplug && state) {
             vcpu->online = info[i].online;

src/qemu/qemu_domain.h

@@ -322,6 +322,7 @@ struct _qemuDomainVcpuPrivate {
 
     pid_t tid; /* vcpu thread id */
     int enable_id; /* order in which the vcpus were enabled in qemu */
+    int qemu_id; /* ID reported by qemu as 'CPU' in query-cpus */
     char *alias;
     bool halted;
 

src/qemu/qemu_monitor.h

@@ -392,6 +392,7 @@ int qemuMonitorSystemReset(qemuMonitorPtr mon);
 int qemuMonitorSystemPowerdown(qemuMonitorPtr mon);
 
 struct qemuMonitorQueryCpusEntry {
+    int qemu_id; /* id of the cpu as reported by qemu */
     pid_t tid;
     char *qom_path;
     bool halted;
@@ -422,6 +423,7 @@ void qemuMonitorQueryHotpluggableCpusFree(struct qemuMonitorQueryHotpluggableCpu
 struct _qemuMonitorCPUInfo {
     pid_t tid;
     int id; /* order of enabling of the given cpu */
+    int qemu_id; /* identifier of the cpu as reported by query-cpus */
 
     /* state data */
     bool online;

src/qemu/qemu_monitor_json.c

@@ -1344,6 +1344,7 @@ qemuMonitorJSONExtractCPUInfo(virJSONValuePtr data,
 
     for (i = 0; i < ncpus; i++) {
         virJSONValuePtr entry = virJSONValueArrayGet(data, i);
+        int cpuid = -1;
         int thread = 0;
         bool halted = false;
         const char *qom_path;
@@ -1354,10 +1355,12 @@ qemuMonitorJSONExtractCPUInfo(virJSONValuePtr data,
 
         /* Some older qemu versions don't report the thread_id so treat this as
          * non-fatal, simply returning no data */
+        ignore_value(virJSONValueObjectGetNumberInt(entry, "CPU", &cpuid));
         ignore_value(virJSONValueObjectGetNumberInt(entry, "thread_id", &thread));
         ignore_value(virJSONValueObjectGetBoolean(entry, "halted", &halted));
         qom_path = virJSONValueObjectGetString(entry, "qom_path");
 
+        cpus[i].qemu_id = cpuid;
         cpus[i].tid = thread;
         cpus[i].halted = halted;
         if (VIR_STRDUP(cpus[i].qom_path, qom_path) < 0)

src/qemu/qemu_monitor_text.c

@@ -528,8 +528,18 @@ qemuMonitorTextQueryCPUs(qemuMonitorPtr mon,
     do {
         char *offset = NULL;
         char *end = NULL;
+        int cpuid = -1;
         int tid = 0;
 
+        /* extract cpu number */
+        if ((offset = strstr(line, "#")) == NULL)
+            goto cleanup;
+
+        if (virStrToLong_i(offset + strlen("#"), &end, 10, &cpuid) < 0)
+            goto cleanup;
+        if (end == NULL || *end != ':')
+            goto cleanup;
+
         /* Extract host Thread ID */
         if ((offset = strstr(line, "thread_id=")) == NULL)
             goto cleanup;
@@ -539,6 +549,7 @@ qemuMonitorTextQueryCPUs(qemuMonitorPtr mon,
         if (end == NULL || !c_isspace(*end))
             goto cleanup;
 
+        cpu.qemu_id = cpuid;
         cpu.tid = tid;
 
         /* Extract halted indicator */

tests/qemumonitorjsontest.c

@@ -1338,10 +1338,10 @@ testQemuMonitorJSONqemuMonitorJSONQueryCPUs(const void *data)
     int ret = -1;
     struct qemuMonitorQueryCpusEntry *cpudata = NULL;
     struct qemuMonitorQueryCpusEntry expect[] = {
-        {17622, (char *) "/machine/unattached/device[0]", true},
-        {17624, (char *) "/machine/unattached/device[1]", true},
-        {17626, (char *) "/machine/unattached/device[2]", true},
-        {17628, NULL, true},
+        {0, 17622, (char *) "/machine/unattached/device[0]", true},
+        {1, 17624, (char *) "/machine/unattached/device[1]", true},
+        {2, 17626, (char *) "/machine/unattached/device[2]", true},
+        {3, 17628, NULL, true},
     };
     size_t ncpudata = 0;
     size_t i;