[libvirt] [RFC PATCH 20/28] Introduce qemuDomainDeviceParseXMLMany

[Shivaprasad G Bhat]

Signed-off-by: Shivaprasad G Bhat <sbhat at linux.vnet.ibm.com>
---
 src/qemu/qemu_domain.c |   67 ++++++++++++++++++++++++++++++++++++++++++++++++
 src/qemu/qemu_domain.h |    5 ++++
 2 files changed, 72 insertions(+)

diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 12ed68a89b..c0a0af525f 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -11842,3 +11842,70 @@ qemuProcessEventFree(struct qemuProcessEvent *event)
     }
     VIR_FREE(event);
 }
+
+
+static bool isPCIMultifunctionDeviceXML(const char *xml)
+{
+   xmlDocPtr xmlptr;
+
+   if (!(xmlptr = virXMLParse(NULL, xml, _("(device_definition)")))) {
+       /* We report error anyway later */
+       return false;
+   }
+
+   return STREQ((const char *)(xmlDocGetRootElement(xmlptr))->name, "devices");
+}
+
+static
+int qemuDomainValidateMultifunctionDeviceList(virDomainDeviceDefListPtr devlist)
+{
+    size_t i;
+    virDomainHostdevDefPtr hostdev = NULL;
+    virDomainDeviceInfoPtr info;
+
+    for (i = 0; i < devlist->count; i++) {
+       info = virDomainDeviceGetInfo(devlist->devs[i]);
+       if (devlist->devs[i]->type == VIR_DOMAIN_DEVICE_HOSTDEV)
+           hostdev = devlist->devs[i]->data.hostdev;
+
+       if (hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI)
+           return -1;
+
+       if (info->type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE &&
+           info->type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI) {
+           return -1;
+       }
+   }
+   return 0;
+}
+
+
+virDomainDeviceDefListPtr
+qemuDomainDeviceParseXMLMany(const char *xml,
+                             virDomainDeviceDefListDataPtr data,
+                             unsigned int parse_flags)
+{
+    virDomainDeviceDefListPtr devlist = NULL;
+
+    if (isPCIMultifunctionDeviceXML(xml)) {
+        if (!(devlist = virDomainDeviceDefParseXMLMany(xml, data->def,
+                                                       data->caps, data->xmlopt,
+                                                       parse_flags)))
+            goto cleanup;
+
+        if (qemuDomainValidateMultifunctionDeviceList(devlist) < 0)
+            goto cleanup;
+    } else {
+        virDomainDeviceDefPtr dev = virDomainDeviceDefParse(xml, data->def,
+                                                            data->caps, data->xmlopt,
+                                                            parse_flags);
+        if (!dev || VIR_ALLOC(devlist) < 0)
+            goto cleanup;
+
+        if (VIR_APPEND_ELEMENT(devlist->devs, devlist->count, dev) < 0)
+            goto cleanup;
+    }
+
+ cleanup:
+    return devlist;
+}
diff --git a/src/qemu/qemu_domain.h b/src/qemu/qemu_domain.h
index fbfc994652..339d0ba82c 100644
--- a/src/qemu/qemu_domain.h
+++ b/src/qemu/qemu_domain.h
@@ -1011,4 +1011,9 @@ qemuDomainPrepareDiskSource(virDomainDiskDefPtr disk,
                             qemuDomainObjPrivatePtr priv,
                             virQEMUDriverConfigPtr cfg);
 
+virDomainDeviceDefListPtr
+qemuDomainDeviceParseXMLMany(const char *xml,
+                             virDomainDeviceDefListDataPtr data,
+                             unsigned int parse_flags);
+
 #endif /* __QEMU_DOMAIN_H__ */