[RFC PATCH 07/11] qemu_monitor: introduce qemuMonitorAddMemoryBackend

[Zhu Guihua <zhugh.fnst@xxxxxxxxxxxxxx>]

The function being introduced is responsible for excuting
'object_add' command to hot add memory backend.

Signed-off-by: Zhu Guihua <zhugh.fnst@xxxxxxxxxxxxxx>
---
 src/qemu/qemu_monitor.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++++
 src/qemu/qemu_monitor.h |  4 ++++
 2 files changed, 58 insertions(+)

diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index 6882a50..1db8ad0 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -4165,6 +4165,60 @@ int qemuMonitorGetTPMTypes(qemuMonitorPtr mon,
     return qemuMonitorJSONGetTPMTypes(mon, tpmtypes);
 }
 
+int qemuMonitorAddMemoryBackend(qemuMonitorPtr mon,
+                                const char *objID,
+                                virDomainDimmDefPtr dimm)
+{
+    VIR_DEBUG("mon=%p objID=%s dimm=%p",
+              mon, objID, dimm);
+
+    virJSONValuePtr props = NULL;
+    const char *type = NULL;
+
+    if (!mon) {
+        virReportError(VIR_ERR_INVALID_ARG, "%s",
+                       _("monitor must not be NULL"));
+        goto cleanup;
+    }
+
+    if (!mon->json) {
+        virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
+                       _("JSON monitor is required"));
+        goto cleanup;
+    }
+
+    if (!(props = virJSONValueNewObject()))
+        goto cleanup;
+
+    switch (dimm->backend.type) {
+    case VIR_DOMAIN_MEMORY_BACKEND_RAM:
+        type = "memory-backend-ram";
+        if ( virJSONValueObjectAppendNumberUlong(props,
+                                        "size", dimm->backend.size * 1024) < 0)
+            goto cleanup;
+        break;
+
+    case VIR_DOMAIN_MEMORY_BACKEND_FILE:
+        type = "memory-backend-file";
+        if (virJSONValueObjectAppendNumberUlong(props, "size",
+                                                dimm->backend.size * 1024) < 0)
+            goto cleanup;
+        if (virJSONValueObjectAppendString(props, "mem-path",
+                                           dimm->backend.mem_path) < 0)
+            goto cleanup;
+        break;
+
+    default:
+        break;
+    }
+
+    return qemuMonitorAddObject(mon, type, objID, props);
+
+ cleanup:
+    virJSONValueFree(props);
+    return -1;
+}
+
 int qemuMonitorAttachCharDev(qemuMonitorPtr mon,
                              const char *chrID,
                              virDomainChrSourceDefPtr chr)
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index 133d42d..9a69611 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -863,6 +863,10 @@ int qemuMonitorGetTPMModels(qemuMonitorPtr mon,
 int qemuMonitorGetTPMTypes(qemuMonitorPtr mon,
                            char ***tpmtypes);
 
+int qemuMonitorAddMemoryBackend(qemuMonitorPtr mon,
+                                const char *objID,
+                                virDomainDimmDefPtr dimm);
+
 int qemuMonitorAttachCharDev(qemuMonitorPtr mon,
                              const char *chrID,
                              virDomainChrSourceDefPtr chr);
-- 
1.9.3

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