[libvirt] [PATCH 4/6] qemu: Introduce qemuMonitor[JSON]QueryDump

[John Ferlan]

Generate the Monitor and JSONMonitor commands to query the memory
dump data based on QEMU DumpQueryResult and DumpStatus values.

Signed-off-by: John Ferlan <jferlan at redhat.com>
---
 src/qemu/qemu_monitor.c      | 18 ++++++++++++
 src/qemu/qemu_monitor.h      | 22 ++++++++++++++
 src/qemu/qemu_monitor_json.c | 69 ++++++++++++++++++++++++++++++++++++++++++++
 src/qemu/qemu_monitor_json.h |  4 +++
 4 files changed, 113 insertions(+)

diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index 473a527358..1578cd4e5f 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -202,6 +202,10 @@ VIR_ENUM_IMPL(qemuMonitorBlockIOStatus,
               QEMU_MONITOR_BLOCK_IO_STATUS_LAST,
               "ok", "failed", "nospace")
 
+VIR_ENUM_IMPL(qemuMonitorDumpStatus,
+              QEMU_MONITOR_DUMP_STATUS_LAST,
+              "none", "active", "completed", "failed")
+
 char *
 qemuMonitorEscapeArg(const char *in)
 {
@@ -2742,6 +2746,20 @@ qemuMonitorMigrateCancel(qemuMonitorPtr mon)
 }
 
 
+int
+qemuMonitorQueryDump(qemuMonitorPtr mon,
+                     qemuMonitorDumpStatsPtr stats)
+{
+    QEMU_CHECK_MONITOR(mon);
+
+    /* No capability is supported without JSON monitor */
+    if (!mon->json)
+        return 0;
+
+    return qemuMonitorJSONQueryDump(mon, stats);
+}
+
+
 /**
  * Returns 1 if @capability is supported, 0 if it's not, or -1 on error.
  */
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index f81fb7f2ad..da58d77e4e 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -756,6 +756,28 @@ int qemuMonitorMigrateCancel(qemuMonitorPtr mon);
 int qemuMonitorGetDumpGuestMemoryCapability(qemuMonitorPtr mon,
                                             const char *capability);
 
+typedef enum {
+    QEMU_MONITOR_DUMP_STATUS_NONE,
+    QEMU_MONITOR_DUMP_STATUS_ACTIVE,
+    QEMU_MONITOR_DUMP_STATUS_COMPLETED,
+    QEMU_MONITOR_DUMP_STATUS_FAILED,
+
+    QEMU_MONITOR_DUMP_STATUS_LAST,
+} qemuMontiorDumpStatus;
+
+VIR_ENUM_DECL(qemuMonitorDumpStatus)
+
+typedef struct _qemuMonitorDumpStats qemuMonitorDumpStats;
+typedef qemuMonitorDumpStats *qemuMonitorDumpStatsPtr;
+struct _qemuMonitorDumpStats {
+    int status; /* qemuMonitorDumpStatus */
+    unsigned long long completed; /* bytes written */
+    unsigned long long total; /* total bytes to be written */
+};
+
+int qemuMonitorQueryDump(qemuMonitorPtr mon,
+                         qemuMonitorDumpStatsPtr stats);
+
 int qemuMonitorDumpToFd(qemuMonitorPtr mon,
                         int fd,
                         const char *dumpformat);
diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index ed424e3343..be2961b6ee 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -3100,6 +3100,75 @@ int qemuMonitorJSONMigrateCancel(qemuMonitorPtr mon)
     return ret;
 }
 
+
+/* qemuMonitorJSONQueryDump:
+ * @mon: Monitor pointer
+ * @stats: Dump "stats"
+ *
+ * Attempt to make a "query-dump" call, check for errors, and get/return
+ * the current from the reply
+ *
+ * Returns: 0 on success, -1 on failure
+ */
+int
+qemuMonitorJSONQueryDump(qemuMonitorPtr mon,
+                         qemuMonitorDumpStatsPtr stats)
+{
+    int ret = -1;
+    virJSONValuePtr cmd = qemuMonitorJSONMakeCommand("query-dump", NULL);
+    virJSONValuePtr reply = NULL;
+    virJSONValuePtr result = NULL;
+    const char *statusstr;
+
+    if (!cmd)
+        return -1;
+
+    if (qemuMonitorJSONCommand(mon, cmd, &reply) < 0)
+        goto cleanup;
+
+    if (qemuMonitorJSONCheckError(cmd, reply) < 0)
+        goto cleanup;
+
+    if (!(result = virJSONValueObjectGetObject(reply, "return")))
+        goto cleanup;
+
+    if (!(statusstr = virJSONValueObjectGetString(result, "status"))) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                       _("incomplete result, failed to get status"));
+        goto cleanup;
+    }
+
+    stats->status = qemuMonitorDumpStatusTypeFromString(statusstr);
+    if (stats->status < 0) {
+        virReportError(VIR_ERR_INTERNAL_ERROR,
+                       _("incomplete result, unknown status string '%s'"),
+                       statusstr);
+        goto cleanup;
+    }
+
+    if (virJSONValueObjectGetNumberUlong(result, "completed",
+                                         &stats->completed) < 0) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                       _("incomplete result, failed to get completed"));
+        goto cleanup;
+    }
+
+    if (virJSONValueObjectGetNumberUlong(result, "total", &stats->total) < 0) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                       _("incomplete result, failed to get total"));
+        goto cleanup;
+    }
+
+    ret = 0;
+
+ cleanup:
+    virJSONValueFree(cmd);
+    virJSONValueFree(reply);
+    virJSONValueFree(result);
+    return ret;
+}
+
+
 int
 qemuMonitorJSONGetDumpGuestMemoryCapability(qemuMonitorPtr mon,
                                             const char *capability)
diff --git a/src/qemu/qemu_monitor_json.h b/src/qemu/qemu_monitor_json.h
index 739a99293c..090e3a1441 100644
--- a/src/qemu/qemu_monitor_json.h
+++ b/src/qemu/qemu_monitor_json.h
@@ -162,6 +162,10 @@ int qemuMonitorJSONGetSpiceMigrationStatus(qemuMonitorPtr mon,
 
 int qemuMonitorJSONMigrateCancel(qemuMonitorPtr mon);
 
+int
+qemuMonitorJSONQueryDump(qemuMonitorPtr mon,
+                         qemuMonitorDumpStatsPtr stats);
+
 int qemuMonitorJSONGetDumpGuestMemoryCapability(qemuMonitorPtr mon,
                                                 const char *capability);
 
-- 
2.13.6