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Re: [libvirt] [PATCH v8 6/8] parallels: implement virDomainDefineXML operation for existing domains



On 07/04/12 19:42, Dmitry Guryanov wrote:
Add parallelsDomainDefineXML function, it works only for existing
domains for the present.

It's too hard to convert libvirt's XML domain configuration into
PARALLELS's one, so I've decided to compare virDomainDef structures:
current domain definition and the one created from XML, given to
the function. And change only different parameters.

Only description change implemetented, changing other parameters
will be implemented later.

Signed-off-by: Dmitry Guryanov <dguryanov parallels com>
---
  src/parallels/parallels_driver.c |   89 ++++++++++++++++++++++++++++++++++++++
  1 files changed, 89 insertions(+), 0 deletions(-)

diff --git a/src/parallels/parallels_driver.c b/src/parallels/parallels_driver.c
index b3d863f..54bdc9a 100644
--- a/src/parallels/parallels_driver.c
+++ b/src/parallels/parallels_driver.c
@@ -1089,6 +1089,94 @@ parallelsShutdownDomain(virDomainPtr domain)
                                  VIR_DOMAIN_EVENT_STOPPED_SHUTDOWN);
  }

+static int
+parallelsSetDescription(virDomainObjPtr dom, const char *description)
+{
+    parallelsDomObjPtr parallelsdom;
+
+    parallelsdom = dom->privateData;
+    if (parallelsCmdRun(PRLCTL, "set", parallelsdom->uuid,
+                  "--description", description, NULL))
+        return -1;
+
+    return 0;
+}
+
+static int
+parallelsApplyChanges(virDomainObjPtr dom, virDomainDefPtr newdef)
+{
+    virDomainDefPtr olddef = dom->def;
+
+    if (newdef->description && !STREQ(olddef->description, newdef->description)) {
+        if (parallelsSetDescription(dom, newdef->description))
+            return -1;
+    }
+
+    /* TODO: compare all other parameters */

You should reject the change if something else is changed. Now the change gets silently ignored but it's changed in libvirts data structs.

+
+    return 0;
+}
+
+static virDomainPtr
+parallelsDomainDefineXML(virConnectPtr conn, const char *xml)
+{
+    parallelsConnPtr privconn = conn->privateData;
+    virDomainPtr ret = NULL;
+    virDomainDefPtr def;
+    virDomainObjPtr dom = NULL, olddom = NULL;
+    virDomainEventPtr event = NULL;
+    int dupVM;
+
+    parallelsDriverLock(privconn);
+    if ((def = virDomainDefParseString(privconn->caps, xml,
+                                       1 << VIR_DOMAIN_VIRT_PARALLELS,
+                                       VIR_DOMAIN_XML_INACTIVE)) == NULL) {
+        parallelsError(VIR_ERR_INVALID_ARG, _("Can't parse XML desc"));
+        goto cleanup;
+    }
+
+    if ((dupVM = virDomainObjIsDuplicate(&privconn->domains, def, 0)) < 0) {
+        parallelsError(VIR_ERR_INVALID_ARG, _("Already exists"));
+        goto cleanup;
+    }
+
+    if (dupVM == 1) {
+        olddom = virDomainFindByUUID(&privconn->domains, def->uuid);
+        parallelsApplyChanges(olddom, def);
+        virDomainObjUnlock(olddom);
+
+        if (!(dom = virDomainAssignDef(privconn->caps,
+                                       &privconn->domains, def, false))) {
+            parallelsError(VIR_ERR_INTERNAL_ERROR, _("Can't allocate domobj"));
+            goto cleanup;
+        }
+
+        def = NULL;
+    } else {
+        parallelsError(VIR_ERR_NO_SUPPORT, _("Not implemented yet"));
+            goto cleanup;
+    }
+
+    event = virDomainEventNewFromObj(dom,
+                                     VIR_DOMAIN_EVENT_DEFINED,
+                                     !dupVM ?
+                                     VIR_DOMAIN_EVENT_DEFINED_ADDED :
+                                     VIR_DOMAIN_EVENT_DEFINED_UPDATED);
+
+    ret = virGetDomain(conn, dom->def->name, dom->def->uuid);
+    if (ret)
+        ret->id = dom->def->id;
+
+  cleanup:
+    virDomainDefFree(def);
+    if (dom)
+        virDomainObjUnlock(dom);
+    if (event)
+        parallelsDomainEventQueue(privconn, event);
+    parallelsDriverUnlock(privconn);
+    return ret;
+}
+
  static virDriver parallelsDriver = {
      .no = VIR_DRV_PARALLELS,
      .name = "PARALLELS",
@@ -1116,6 +1204,7 @@ static virDriver parallelsDriver = {
      .domainDestroy = parallelsDestroyDomain,  /* 0.10.0 */
      .domainShutdown = parallelsShutdownDomain, /* 0.10.0 */
      .domainCreate = parallelsDomainCreate,    /* 0.10.0 */
+    .domainDefineXML = parallelsDomainDefineXML,      /* 0.10.0 */
  };

  /**



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