vmx: Expose datacenter path in domain XML

Tool such as libguestfs need the datacenter path to get access to disk
images. The ESX driver knows the correct datacenter path, but this
information cannot be accessed using libvirt API yet. Also, it cannot
be deduced from the connection URI in a robust way.

Expose the datacenter path in the domain XML as <vmware:datacenterpath>
node similar to the way the <qemu:commandline> node works. The new node
is ignored while parsing the domain XML. In contrast to <qemu:commandline>
it is output only.

src/esx/esx_driver.c

@@ -2741,6 +2741,7 @@ esxDomainGetXMLDesc(virDomainPtr domain, unsigned int flags)
     ctx.parseFileName = esxParseVMXFileName;
     ctx.formatFileName = NULL;
     ctx.autodetectSCSIControllerModel = NULL;
+    ctx.datacenterPath = priv->primary->datacenterPath;
 
     def = virVMXParseConfig(&ctx, priv->xmlopt, vmx);
 
@@ -2799,6 +2800,7 @@ esxConnectDomainXMLFromNative(virConnectPtr conn, const char *nativeFormat,
     ctx.parseFileName = esxParseVMXFileName;
     ctx.formatFileName = NULL;
     ctx.autodetectSCSIControllerModel = NULL;
+    ctx.datacenterPath = NULL;
 
     def = virVMXParseConfig(&ctx, priv->xmlopt, nativeConfig);
 
@@ -2853,6 +2855,7 @@ esxConnectDomainXMLToNative(virConnectPtr conn, const char *nativeFormat,
     ctx.parseFileName = NULL;
     ctx.formatFileName = esxFormatVMXFileName;
     ctx.autodetectSCSIControllerModel = esxAutodetectSCSIControllerModel;
+    ctx.datacenterPath = NULL;
 
     vmx = virVMXFormatConfig(&ctx, priv->xmlopt, def, virtualHW_version);
 
@@ -3096,6 +3099,7 @@ esxDomainDefineXMLFlags(virConnectPtr conn, const char *xml, unsigned int flags)
     ctx.parseFileName = NULL;
     ctx.formatFileName = esxFormatVMXFileName;
     ctx.autodetectSCSIControllerModel = esxAutodetectSCSIControllerModel;
+    ctx.datacenterPath = NULL;
 
     vmx = virVMXFormatConfig(&ctx, priv->xmlopt, def, virtualHW_version);
 

src/vmware/vmware_conf.c

@@ -145,6 +145,9 @@ vmwareLoadDomains(struct vmware_driver *driver)
     virCommandPtr cmd;
 
     ctx.parseFileName = vmwareCopyVMXFileName;
+    ctx.formatFileName = NULL;
+    ctx.autodetectSCSIControllerModel = NULL;
+    ctx.datacenterPath = NULL;
 
     cmd = virCommandNewArgList(driver->vmrun, "-T",
                                vmwareDriverTypeToString(driver->type),

src/vmware/vmware_driver.c

@@ -381,7 +381,10 @@ vmwareDomainDefineXMLFlags(virConnectPtr conn, const char *xml, unsigned int fla
     if (flags & VIR_DOMAIN_DEFINE_VALIDATE)
         parse_flags |= VIR_DOMAIN_DEF_PARSE_VALIDATE;
 
+    ctx.parseFileName = NULL;
     ctx.formatFileName = vmwareCopyVMXFileName;
+    ctx.autodetectSCSIControllerModel = NULL;
+    ctx.datacenterPath = NULL;
 
     vmwareDriverLock(driver);
     if ((vmdef = virDomainDefParseString(xml, driver->caps, driver->xmlopt,
@@ -671,7 +674,10 @@ vmwareDomainCreateXML(virConnectPtr conn, const char *xml,
     if (flags & VIR_DOMAIN_START_VALIDATE)
         parse_flags |= VIR_DOMAIN_DEF_PARSE_VALIDATE;
 
+    ctx.parseFileName = NULL;
     ctx.formatFileName = vmwareCopyVMXFileName;
+    ctx.autodetectSCSIControllerModel = NULL;
+    ctx.datacenterPath = NULL;
 
     vmwareDriverLock(driver);
 
@@ -1022,6 +1028,9 @@ vmwareConnectDomainXMLFromNative(virConnectPtr conn, const char *nativeFormat,
     }
 
     ctx.parseFileName = vmwareCopyVMXFileName;
+    ctx.formatFileName = NULL;
+    ctx.autodetectSCSIControllerModel = NULL;
+    ctx.datacenterPath = NULL;
 
     def = virVMXParseConfig(&ctx, driver->xmlopt, nativeConfig);
 

src/vmx/vmx.c

@@ -523,10 +523,11 @@ VIR_ENUM_IMPL(virVMXControllerModelSCSI, VIR_DOMAIN_CONTROLLER_MODEL_SCSI_LAST,
 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
  * Helpers
  */
+
 static int
-vmxDomainDefPostParse(virDomainDefPtr def,
-                      virCapsPtr caps ATTRIBUTE_UNUSED,
-                      void *opaque ATTRIBUTE_UNUSED)
+virVMXDomainDefPostParse(virDomainDefPtr def,
+                         virCapsPtr caps ATTRIBUTE_UNUSED,
+                         void *opaque ATTRIBUTE_UNUSED)
 {
     /* memory hotplug tunables are not supported by this driver */
     if (virDomainDefCheckUnsupportedMemoryHotplug(def) < 0)
@@ -536,27 +537,60 @@ vmxDomainDefPostParse(virDomainDefPtr def,
 }
 
 static int
-vmxDomainDeviceDefPostParse(virDomainDeviceDefPtr dev ATTRIBUTE_UNUSED,
-                            const virDomainDef *def ATTRIBUTE_UNUSED,
-                            virCapsPtr caps ATTRIBUTE_UNUSED,
-                            void *opaque ATTRIBUTE_UNUSED)
+virVMXDomainDevicesDefPostParse(virDomainDeviceDefPtr dev ATTRIBUTE_UNUSED,
+                                const virDomainDef *def ATTRIBUTE_UNUSED,
+                                virCapsPtr caps ATTRIBUTE_UNUSED,
+                                void *opaque ATTRIBUTE_UNUSED)
 {
     return 0;
 }
 
-virDomainDefParserConfig virVMXDomainDefParserConfig = {
+static virDomainDefParserConfig virVMXDomainDefParserConfig = {
     .hasWideSCSIBus = true,
     .macPrefix = {0x00, 0x0c, 0x29},
-    .devicesPostParseCallback = vmxDomainDeviceDefPostParse,
-    .domainPostParseCallback = vmxDomainDefPostParse,
+    .devicesPostParseCallback = virVMXDomainDevicesDefPostParse,
+    .domainPostParseCallback = virVMXDomainDefPostParse,
 };
 
+static void
+virVMXDomainDefNamespaceFree(void *nsdata)
+{
+    VIR_FREE(nsdata);
+}
+
+static int
+virVMXDomainDefNamespaceFormatXML(virBufferPtr buf, void *nsdata)
+{
+    const char *datacenterPath = nsdata;
+
+    if (!datacenterPath)
+        return 0;
+
+    virBufferAddLit(buf, "<vmware:datacenterpath>");
+    virBufferEscapeString(buf, "%s", datacenterPath);
+    virBufferAddLit(buf, "</vmware:datacenterpath>\n");
+
+    return 0;
+}
+
+static const char *
+virVMXDomainDefNamespaceHref(void)
+{
+    return "xmlns:vmware='http://libvirt.org/schemas/domain/vmware/1.0'";
+}
+
+static virDomainXMLNamespace virVMXDomainXMLNamespace = {
+    .parse = NULL,
+    .free = virVMXDomainDefNamespaceFree,
+    .format = virVMXDomainDefNamespaceFormatXML,
+    .href = virVMXDomainDefNamespaceHref,
+};
 
 virDomainXMLOptionPtr
 virVMXDomainXMLConfInit(void)
 {
-    return virDomainXMLOptionNew(&virVMXDomainDefParserConfig,
-                               NULL, NULL);
+    return virDomainXMLOptionNew(&virVMXDomainDefParserConfig, NULL,
+                                 &virVMXDomainXMLNamespace);
 }
 
 char *
@@ -1268,6 +1302,7 @@ virVMXParseConfig(virVMXContext *ctx,
     bool hgfs_disabled = true;
     long long sharedFolder_maxNum = 0;
     int cpumasklen;
+    char *namespaceData;
 
     if (ctx->parseFileName == NULL) {
         virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
@@ -1767,6 +1802,15 @@ virVMXParseConfig(virVMXContext *ctx,
             ++def->nparallels;
     }
 
+    /* ctx:datacenterPath -> def:namespaceData */
+    if (ctx->datacenterPath) {
+        if (VIR_STRDUP(namespaceData, ctx->datacenterPath) < 0)
+            goto cleanup;
+
+        def->ns = *virDomainXMLOptionGetNamespace(xmlopt);
+        def->namespaceData = namespaceData;
+    }
+
     success = true;
 
  cleanup:

src/vmx/vmx.h

 /*
  * vmx.h: VMware VMX parsing/formatting functions
  *
- * Copyright (C) 2009-2010 Matthias Bolte <matthias.bolte@googlemail.com>
+ * Copyright (C) 2009-2011, 2015 Matthias Bolte <matthias.bolte@googlemail.com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -41,15 +41,17 @@ typedef int (*virVMXAutodetectSCSIControllerModel)(virDomainDiskDefPtr def,
                                                    int *model, void *opaque);
 
 /*
- * virVMXParseFileName is only used by virVMXParseConfig.
- * virVMXFormatFileName is only used by virVMXFormatConfig.
- * virVMXAutodetectSCSIControllerModel is optionally used by virVMXFormatConfig.
+ * parseFileName is only used by virVMXParseConfig.
+ * formatFileName is only used by virVMXFormatConfig.
+ * autodetectSCSIControllerModel is optionally used by virVMXFormatConfig.
+ * datacenterPath is only used by virVMXFormatConfig.
  */
 struct _virVMXContext {
     void *opaque;
     virVMXParseFileName parseFileName;
     virVMXFormatFileName formatFileName;
     virVMXAutodetectSCSIControllerModel autodetectSCSIControllerModel;
+    const char *datacenterPath; /* including folders */
 };
 
 

tests/vmx2xmldata/vmx2xml-datacenterpath.vmx

+config.version = "8"
+virtualHW.version = "4"

tests/vmx2xmldata/vmx2xml-datacenterpath.xml

+<domain type='vmware' xmlns:vmware='http://libvirt.org/schemas/domain/vmware/1.0'>
+  <uuid>00000000-0000-0000-0000-000000000000</uuid>
+  <memory unit='KiB'>32768</memory>
+  <currentMemory unit='KiB'>32768</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='i686'>hvm</type>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <video>
+      <model type='vmvga' vram='4096'/>
+    </video>
+  </devices>
+  <vmware:datacenterpath>folder1/folder2/datacenter1</vmware:datacenterpath>
+</domain>

tests/vmx2xmltest.c

@@ -201,6 +201,7 @@ mymain(void)
     ctx.parseFileName = testParseVMXFileName;
     ctx.formatFileName = NULL;
     ctx.autodetectSCSIControllerModel = NULL;
+    ctx.datacenterPath = NULL;
 
     DO_TEST("case-insensitive-1", "case-insensitive-1");
     DO_TEST("case-insensitive-2", "case-insensitive-2");
@@ -280,6 +281,10 @@ mymain(void)
 
     DO_TEST("svga", "svga");
 
+    ctx.datacenterPath = "folder1/folder2/datacenter1";
+
+    DO_TEST("datacenterpath", "datacenterpath");
+
     virObjectUnref(caps);
     virObjectUnref(xmlopt);
 

tests/xml2vmxdata/xml2vmx-datacenterpath.vmx

+.encoding = "UTF-8"
+config.version = "8"
+virtualHW.version = "4"
+guestOS = "other"
+uuid.bios = "56 4d 9b ef ac d9 b4 e0-c8 f0 ae a8 b9 10 35 15"
+displayName = "datacenterpath"
+memsize = "4"
+numvcpus = "1"
+floppy0.present = "false"
+floppy1.present = "false"

tests/xml2vmxdata/xml2vmx-datacenterpath.xml

+<domain type='vmware' xmlns:vmware='http://libvirt.org/schemas/domain/vmware/1.0'>
+  <name>datacenterpath</name>
+  <uuid>564d9bef-acd9-b4e0-c8f0-aea8b9103515</uuid>
+  <memory unit='KiB'>4096</memory>
+  <os>
+    <type>hvm</type>
+  </os>
+  <vmware:datacenterpath>folder1/folder2/datacenter1</vmware:datacenterpath>
+</domain>

tests/xml2vmxtest.c

@@ -221,6 +221,7 @@ mymain(void)
     ctx.parseFileName = NULL;
     ctx.formatFileName = testFormatVMXFileName;
     ctx.autodetectSCSIControllerModel = testAutodetectSCSIControllerModel;
+    ctx.datacenterPath = NULL;
 
     DO_TEST("minimal", "minimal", 4);
     DO_TEST("minimal-64bit", "minimal-64bit", 4);
@@ -293,6 +294,8 @@ mymain(void)
 
     DO_TEST("svga", "svga", 4);
 
+    DO_TEST("datacenterpath", "datacenterpath", 4);
+
     virObjectUnref(caps);
     virObjectUnref(xmlopt);