[libvirt] [PATCH 2/7] qemu: Issue query-iothreads and to get list of active IOThreads
John Ferlan
jferlan at redhat.com
Wed Sep 3 16:15:31 UTC 2014
Generate infrastructure and test to handle fetching the QMP
IOThreads data.
Signed-off-by: John Ferlan <jferlan at redhat.com>
---
src/qemu/qemu_monitor.c | 41 ++++++++++++++++++++
src/qemu/qemu_monitor.h | 12 ++++++
src/qemu/qemu_monitor_json.c | 91 ++++++++++++++++++++++++++++++++++++++++++++
src/qemu/qemu_monitor_json.h | 4 ++
tests/qemumonitorjsontest.c | 71 ++++++++++++++++++++++++++++++++++
5 files changed, 219 insertions(+)
diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index 5b2952a..66ebd42 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -4071,3 +4071,44 @@ qemuMonitorRTCResetReinjection(qemuMonitorPtr mon)
return qemuMonitorJSONRTCResetReinjection(mon);
}
+
+/**
+ * qemuMonitorGetIOThreads:
+ * @mon: Pointer to the monitor
+ * @iothreads: Location to return array of IOThreadInfo data
+ *
+ * Issue query-iothreads command.
+ * Retrieve the list of iothreads defined/running for the machine
+ *
+ * Returns count of IOThreadInfo structures on success
+ * -1 on error.
+ */
+int
+qemuMonitorGetIOThreads(qemuMonitorPtr mon,
+ qemuMonitorIOThreadsInfoPtr **iothreads)
+{
+
+ VIR_DEBUG("mon=%p iothreads=%p", mon, iothreads);
+
+ if (!mon) {
+ virReportError(VIR_ERR_INVALID_ARG, "%s",
+ _("monitor must not be NULL"));
+ return -1;
+ }
+
+ if (!mon->json) {
+ virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
+ _("JSON monitor is required"));
+ return -1;
+ }
+
+ return qemuMonitorJSONGetIOThreads(mon, iothreads);
+}
+
+void qemuMonitorIOThreadsInfoFree(qemuMonitorIOThreadsInfoPtr iothread)
+{
+ if (!iothread)
+ return;
+ VIR_FREE(iothread->name);
+ VIR_FREE(iothread);
+}
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index 4fd6f01..c8915ec 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -792,6 +792,18 @@ int qemuMonitorGetGuestCPU(qemuMonitorPtr mon,
int qemuMonitorRTCResetReinjection(qemuMonitorPtr mon);
+typedef struct _qemuMonitorIOThreadsInfo qemuMonitorIOThreadsInfo;
+typedef qemuMonitorIOThreadsInfo *qemuMonitorIOThreadsInfoPtr;
+
+struct _qemuMonitorIOThreadsInfo {
+ char *name;
+ int thread_id;
+};
+int qemuMonitorGetIOThreads(qemuMonitorPtr mon,
+ qemuMonitorIOThreadsInfoPtr **iothreads);
+
+void qemuMonitorIOThreadsInfoFree(qemuMonitorIOThreadsInfoPtr iothread);
+
/**
* When running two dd process and using <> redirection, we need a
* shell that will not truncate files. These two strings serve that
diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index 62e7d5d..b6122dc 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -5872,3 +5872,94 @@ qemuMonitorJSONRTCResetReinjection(qemuMonitorPtr mon)
virJSONValueFree(reply);
return ret;
}
+
+/**
+ * Query and parse returned array of data such as:
+ *
+ * {u'return': [{u'id': u'iothread1', u'thread-id': 30992}, \
+ * {u'id': u'iothread2', u'thread-id': 30993}]}
+ */
+int
+qemuMonitorJSONGetIOThreads(qemuMonitorPtr mon,
+ qemuMonitorIOThreadsInfoPtr **iothreads)
+{
+ int ret = -1;
+ virJSONValuePtr cmd;
+ virJSONValuePtr reply = NULL;
+ virJSONValuePtr data;
+ qemuMonitorIOThreadsInfoPtr *infolist = NULL;
+ int n = 0;
+ size_t i;
+
+ *iothreads = NULL;
+
+ if (!(cmd = qemuMonitorJSONMakeCommand("query-iothreads", NULL)))
+ return ret;
+
+ ret = qemuMonitorJSONCommand(mon, cmd, &reply);
+
+ if (ret == 0)
+ ret = qemuMonitorJSONCheckError(cmd, reply);
+
+ if (ret < 0)
+ goto cleanup;
+
+ ret = -1;
+
+ if (!(data = virJSONValueObjectGet(reply, "return"))) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("query-iothreads reply was missing return data"));
+ goto cleanup;
+ }
+
+ if ((n = virJSONValueArraySize(data)) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("query-iothreads reply data was not an array"));
+ goto cleanup;
+ }
+
+ /* null-terminated list */
+ if (VIR_ALLOC_N(infolist, n + 1) < 0)
+ goto cleanup;
+
+ for (i = 0; i < n; i++) {
+ virJSONValuePtr child = virJSONValueArrayGet(data, i);
+ const char *tmp;
+ qemuMonitorIOThreadsInfoPtr info;
+
+ if (VIR_ALLOC(info) < 0)
+ goto cleanup;
+
+ infolist[i] = info;
+
+ if (!(tmp = virJSONValueObjectGetString(child, "id"))) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("query-iothreads reply data was missing 'id'"));
+ goto cleanup;
+ }
+
+ if (VIR_STRDUP(info->name, tmp) < 0)
+ goto cleanup;
+
+ if (virJSONValueObjectGetNumberInt(child, "thread-id",
+ &info->thread_id) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("query-iothreads reply has malformed "
+ "'thread-id' data"));
+ goto cleanup;
+ }
+ }
+
+ ret = n;
+ *iothreads = infolist;
+
+ cleanup:
+ if (ret < 0 && infolist) {
+ for (i = 0; i < n; i++)
+ qemuMonitorIOThreadsInfoFree(infolist[i]);
+ VIR_FREE(infolist);
+ }
+ virJSONValueFree(cmd);
+ virJSONValueFree(reply);
+ return ret;
+}
diff --git a/src/qemu/qemu_monitor_json.h b/src/qemu/qemu_monitor_json.h
index d8c9308..4a6dbee 100644
--- a/src/qemu/qemu_monitor_json.h
+++ b/src/qemu/qemu_monitor_json.h
@@ -439,4 +439,8 @@ int qemuMonitorJSONGetGuestCPU(qemuMonitorPtr mon,
virCPUDataPtr *data);
int qemuMonitorJSONRTCResetReinjection(qemuMonitorPtr mon);
+
+int qemuMonitorJSONGetIOThreads(qemuMonitorPtr mon,
+ qemuMonitorIOThreadsInfoPtr **iothreads)
+ ATTRIBUTE_NONNULL(2);
#endif /* QEMU_MONITOR_JSON_H */
diff --git a/tests/qemumonitorjsontest.c b/tests/qemumonitorjsontest.c
index e3fb4f7..d53ab05 100644
--- a/tests/qemumonitorjsontest.c
+++ b/tests/qemumonitorjsontest.c
@@ -2217,6 +2217,76 @@ testQemuMonitorJSONGetNonExistingCPUData(const void *opaque)
}
static int
+testQemuMonitorJSONGetIOThreads(const void *data)
+{
+ virDomainXMLOptionPtr xmlopt = (virDomainXMLOptionPtr)data;
+ qemuMonitorTestPtr test = qemuMonitorTestNewSimple(true, xmlopt);
+ qemuMonitorIOThreadsInfoPtr *info;
+ int ninfo = 0;
+ int ret = -1;
+ size_t i;
+
+ if (!test)
+ return -1;
+
+ if (qemuMonitorTestAddItem(test, "query-iothreads",
+ "{ "
+ " \"return\": [ "
+ " { "
+ " \"id\": \"iothread1\", "
+ " \"thread-id\": 30992 "
+ " }, "
+ " { "
+ " \"id\": \"iothread2\", "
+ " \"thread-id\": 30993 "
+ " } "
+ " ]"
+ "}") < 0)
+ goto cleanup;
+
+ if ((ninfo = qemuMonitorGetIOThreads(qemuMonitorTestGetMonitor(test),
+ &info)) < 0)
+ goto cleanup;
+
+ if (ninfo != 2) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ "ninfo %d is not 2", ninfo);
+ goto cleanup;
+ }
+
+#define CHECK(i, wantname, wantthread_id) \
+ do { \
+ if (STRNEQ(info[i]->name, (wantname))) { \
+ virReportError(VIR_ERR_INTERNAL_ERROR, \
+ "name %s is not %s", \
+ info[i]->name, (wantname)); \
+ goto cleanup; \
+ } \
+ if (info[i]->thread_id != (wantthread_id)) { \
+ virReportError(VIR_ERR_INTERNAL_ERROR, \
+ "thread_id %d is not %d", \
+ info[i]->thread_id, (wantthread_id)); \
+ goto cleanup; \
+ } \
+ } while (0)
+
+ CHECK(0, "iothread1", 30992);
+ CHECK(1, "iothread2", 30993);
+
+#undef CHECK
+
+ ret = 0;
+
+ cleanup:
+ qemuMonitorTestFree(test);
+ for (i = 0; i < ninfo; i++)
+ qemuMonitorIOThreadsInfoFree(info[i]);
+ VIR_FREE(info);
+
+ return ret;
+}
+
+static int
mymain(void)
{
int ret = 0;
@@ -2272,6 +2342,7 @@ mymain(void)
DO_TEST(GetDeviceAliases);
DO_TEST(CPU);
DO_TEST(GetNonExistingCPUData);
+ DO_TEST(GetIOThreads);
DO_TEST_SIMPLE("qmp_capabilities", qemuMonitorJSONSetCapabilities);
DO_TEST_SIMPLE("system_powerdown", qemuMonitorJSONSystemPowerdown);
DO_TEST_SIMPLE("system_reset", qemuMonitorJSONSystemReset);
--
1.9.3
More information about the libvir-list
mailing list