[PATCH 058/103] qemuBuildMemoryDeviceCommandLine: Generate via JSON

[Peter Krempa]

This includes the 'pc-dimm', 'nvdimm', 'virtio-pmem-pci' and
'virtio-mem-pci' devices.

The value types according to QEMU are:

'pc-dimm'
  node=<uint32>          -  (default: 0)
  memdev=<link<memory-backend>>

'nvdimm'
  label-size=<int>
  memdev=<link<memory-backend>>
  node=<uint32>          -  (default: 0)
  unarmed=<bool>         -  (default: false)
  uuid=<QemuUUID>

'virtio-pmem-pci'
  memdev=<link<memory-backend>>

'virtio-mem-pci'
  block-size=<size>
  memdev=<link<memory-backend>>
  node=<uint32>          -  (default: 0)
  requested-size=<size>

Signed-off-by: Peter Krempa <pkrempa at redhat.com>
---
 src/qemu/qemu_command.c | 60 +++++++++++++++++++----------------------
 src/qemu/qemu_command.h |  7 +++--
 src/qemu/qemu_hotplug.c |  6 ++---
 3 files changed, 33 insertions(+), 40 deletions(-)

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 6fa804f7d8..794119a58c 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -3723,13 +3723,14 @@ qemuBuildMemoryDimmBackendStr(virCommand *cmd,
 }


-char *
-qemuBuildMemoryDeviceStr(const virDomainDef *def,
-                         virDomainMemoryDef *mem,
-                         virQEMUCaps *qemuCaps G_GNUC_UNUSED)
+virJSONValue *
+qemuBuildMemoryDeviceProps(const virDomainDef *def,
+                           virDomainMemoryDef *mem)
 {
-    g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
+    g_autoptr(virJSONValue) props = NULL;
     const char *device = NULL;
+    g_autofree char *uuidstr = NULL;
+    virTristateBool unarmed = VIR_TRISTATE_BOOL_ABSENT;

     if (!mem->info.alias) {
         virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
@@ -3761,37 +3762,31 @@ qemuBuildMemoryDeviceStr(const virDomainDef *def,
         break;
     }

-    virBufferAsprintf(&buf, "%s,", device);
-
-    if (mem->targetNode >= 0)
-        virBufferAsprintf(&buf, "node=%d,", mem->targetNode);
-
-    if (mem->labelsize)
-        virBufferAsprintf(&buf, "label-size=%llu,", mem->labelsize * 1024);
-
-    if (mem->blocksize) {
-        virBufferAsprintf(&buf, "block-size=%llu,", mem->blocksize * 1024);
-        virBufferAsprintf(&buf, "requested-size=%llu,", mem->requestedsize * 1024);
-    }
+    if (mem->readonly)
+        unarmed = VIR_TRISTATE_BOOL_YES;

     if (mem->uuid) {
-        char uuidstr[VIR_UUID_STRING_BUFLEN];
-
+        uuidstr = g_new0(char, VIR_UUID_STRING_BUFLEN);
         virUUIDFormat(mem->uuid, uuidstr);
-        virBufferAsprintf(&buf, "uuid=%s,", uuidstr);
     }

-    if (mem->readonly) {
-        virBufferAddLit(&buf, "unarmed=on,");
-    }
-
-    virBufferAsprintf(&buf, "memdev=mem%s,id=%s",
-                      mem->info.alias, mem->info.alias);
+    if (virJSONValueObjectCreate(&props,
+                                 "s:driver", device,
+                                 "k:node", mem->targetNode,
+                                 "P:label-size", mem->labelsize * 1024,
+                                 "P:block-size", mem->blocksize * 1024,
+                                 "P:requested-size", mem->requestedsize * 1024,
+                                 "S:uuid", uuidstr,
+                                 "T:unarmed", unarmed,
+                                 "f:memdev", g_strdup_printf("mem%s", mem->info.alias),
+                                 "s:id", mem->info.alias,
+                                 NULL) < 0)
+        return NULL;

-    if (qemuBuildDeviceAddressStr(&buf, def, &mem->info) < 0)
+    if (qemuBuildDeviceAddressProps(props, def, &mem->info) < 0)
         return NULL;

-    return virBufferContentAndReset(&buf);
+    return g_steal_pointer(&props);
 }


@@ -7837,17 +7832,16 @@ qemuBuildMemoryDeviceCommandLine(virCommand *cmd,
     /* memory hotplug requires NUMA to be enabled - we already checked
      * that memory devices are present only when NUMA is */
     for (i = 0; i < def->nmems; i++) {
-        char *dimmStr;
+        g_autoptr(virJSONValue) props = NULL;

         if (qemuBuildMemoryDimmBackendStr(cmd, def->mems[i], def, cfg, priv) < 0)
             return -1;

-        if (!(dimmStr = qemuBuildMemoryDeviceStr(def, def->mems[i], priv->qemuCaps)))
+        if (!(props = qemuBuildMemoryDeviceProps(def, def->mems[i])))
             return -1;

-        virCommandAddArgList(cmd, "-device", dimmStr, NULL);
-
-        VIR_FREE(dimmStr);
+        if (qemuBuildDeviceCommandlineFromJSON(cmd, props, priv->qemuCaps) < 0)
+            return -1;
     }

     return 0;
diff --git a/src/qemu/qemu_command.h b/src/qemu/qemu_command.h
index 6ce151d8d9..86df734c57 100644
--- a/src/qemu/qemu_command.h
+++ b/src/qemu/qemu_command.h
@@ -160,10 +160,9 @@ int qemuBuildMemoryBackendProps(virJSONValue **backendProps,
                                 bool force,
                                 bool systemMemory);

-char *
-qemuBuildMemoryDeviceStr(const virDomainDef *def,
-                         virDomainMemoryDef *mem,
-                         virQEMUCaps *qemuCaps);
+virJSONValue *
+qemuBuildMemoryDeviceProps(const virDomainDef *def,
+                           virDomainMemoryDef *mem);

 /* Current, best practice */
 char *qemuBuildPCIHostdevDevStr(const virDomainDef *def,
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index f833a619a7..3e0c9cf981 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -2434,7 +2434,7 @@ qemuDomainAttachMemory(virQEMUDriver *driver,
     g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
     unsigned long long oldmem = virDomainDefGetMemoryTotal(vm->def);
     unsigned long long newmem = oldmem + mem->size;
-    g_autofree char *devstr = NULL;
+    g_autoptr(virJSONValue) devprops = NULL;
     g_autofree char *objalias = NULL;
     bool objAdded = false;
     bool releaseaddr = false;
@@ -2463,7 +2463,7 @@ qemuDomainAttachMemory(virQEMUDriver *driver,

     objalias = g_strdup_printf("mem%s", mem->info.alias);

-    if (!(devstr = qemuBuildMemoryDeviceStr(vm->def, mem, priv->qemuCaps)))
+    if (!(devprops = qemuBuildMemoryDeviceProps(vm->def, mem)))
         goto cleanup;

     if (qemuBuildMemoryBackendProps(&props, objalias, cfg,
@@ -2495,7 +2495,7 @@ qemuDomainAttachMemory(virQEMUDriver *driver,
         goto exit_monitor;
     objAdded = true;

-    if (qemuMonitorAddDevice(priv->mon, devstr) < 0)
+    if (qemuMonitorAddDeviceProps(priv->mon, &devprops) < 0)
         goto exit_monitor;

     if (qemuDomainObjExitMonitor(driver, vm) < 0) {
-- 
2.31.1