vbox: vboxAttachDrives now relies on address info

Previously, the driver was computing VBOX's devicePort/deviceSlot values
based on device name and max port/slot values. While this worked, it
completely ignored <address> values. Additionally, libvirt's built-in
virDomainDiskDefAssignAddress already does a good job  setting default
values on virDomainDeviceDriveAddress struct which we can use to set
devicePort and deviceSlot and accomplish the same result while allowing
the customizing those via XML. Also, this allows to remove some code
which will make further patches smaller.

src/vbox/vbox_common.c

@@ -346,68 +346,6 @@ static bool vboxGetMaxPortSlotValues(IVirtualBox *vbox,
     return true;
 }
 
-/**
- * function to get the StorageBus, Port number
- * and Device number for the given devicename
- * e.g: hda has StorageBus = IDE, port = 0,
- *      device = 0
- *
- * @returns     true on Success, false on failure.
- * @param       deviceName      Input device name
- * @param       aMaxPortPerInst Input array of max port per device instance
- * @param       aMaxSlotPerPort Input array of max slot per device port
- * @param       storageBus      Input storage bus type
- * @param       deviceInst      Output device instance number
- * @param       devicePort      Output port number
- * @param       deviceSlot      Output slot number
- *
- */
-static bool vboxGetDeviceDetails(const char *deviceName,
-                                 PRUint32 *aMaxPortPerInst,
-                                 PRUint32 *aMaxSlotPerPort,
-                                 PRUint32 storageBus,
-                                 PRInt32 *deviceInst,
-                                 PRInt32 *devicePort,
-                                 PRInt32 *deviceSlot)
-{
-    int total = 0;
-    PRUint32 maxPortPerInst = 0;
-    PRUint32 maxSlotPerPort = 0;
-
-    if (!deviceName ||
-        !deviceInst ||
-        !devicePort ||
-        !deviceSlot ||
-        !aMaxPortPerInst ||
-        !aMaxSlotPerPort)
-        return false;
-
-    if ((storageBus < StorageBus_IDE) ||
-        (storageBus > StorageBus_Floppy))
-        return false;
-
-    total = virDiskNameToIndex(deviceName);
-
-    maxPortPerInst = aMaxPortPerInst[storageBus];
-    maxSlotPerPort = aMaxSlotPerPort[storageBus];
-
-    if (!maxPortPerInst ||
-        !maxSlotPerPort ||
-        (total < 0))
-        return false;
-
-    *deviceInst = total / (maxPortPerInst * maxSlotPerPort);
-    *devicePort = (total % (maxPortPerInst * maxSlotPerPort)) / maxSlotPerPort;
-    *deviceSlot = (total % (maxPortPerInst * maxSlotPerPort)) % maxSlotPerPort;
-
-    VIR_DEBUG("name=%s, total=%d, storageBus=%u, deviceInst=%d, "
-          "devicePort=%d deviceSlot=%d, maxPortPerInst=%u maxSlotPerPort=%u",
-          deviceName, total, storageBus, *deviceInst, *devicePort,
-          *deviceSlot, maxPortPerInst, maxSlotPerPort);
-
-    return true;
-}
-
 /**
  * function to generate the name for medium,
  * for e.g: hda, sda, etc
@@ -1022,14 +960,7 @@ vboxAttachDrives(virDomainDefPtr def, vboxDriverPtr data, IMachine *machine)
 {
     size_t i;
     nsresult rc = 0;
-    PRUint32 maxPortPerInst[StorageBus_Floppy + 1] = {};
-    PRUint32 maxSlotPerPort[StorageBus_Floppy + 1] = {};
     PRUnichar *storageCtlName = NULL;
-    bool error = false;
-
-    /* get the max port/slots/etc for the given storage bus */
-    error = !vboxGetMaxPortSlotValues(data->vboxObj, maxPortPerInst,
-                                      maxSlotPerPort);
 
     /* add a storage controller for the mediums to be attached */
     /* this needs to change when multiple controller are supported for
@@ -1071,7 +1002,7 @@ vboxAttachDrives(virDomainDefPtr def, vboxDriverPtr data, IMachine *machine)
         VBOX_RELEASE(storageCtl);
     }
 
-    for (i = 0; i < def->ndisks && !error; i++) {
+    for (i = 0; i < def->ndisks; i++) {
         const char *src = virDomainDiskGetSource(def->disks[i]);
         int type = virDomainDiskGetType(def->disks[i]);
         int format = virDomainDiskGetFormat(def->disks[i]);
@@ -1095,12 +1026,10 @@ vboxAttachDrives(virDomainDefPtr def, vboxDriverPtr data, IMachine *machine)
             IMedium *medium = NULL;
             vboxIID mediumUUID;
             PRUnichar *mediumFileUtf16 = NULL;
-            PRUint32 storageBus = StorageBus_Null;
             PRUint32 deviceType = DeviceType_Null;
             PRUint32 accessMode = AccessMode_ReadOnly;
-            PRInt32 deviceInst = 0;
-            PRInt32 devicePort = 0;
-            PRInt32 deviceSlot = 0;
+            PRInt32 devicePort = def->disks[i]->info.addr.drive.unit;
+            PRInt32 deviceSlot = def->disks[i]->info.addr.drive.bus;
 
             VBOX_IID_INITIALIZE(&mediumUUID);
             VBOX_UTF8_TO_UTF16(src, &mediumFileUtf16);
@@ -1166,35 +1095,16 @@ vboxAttachDrives(virDomainDefPtr def, vboxDriverPtr data, IMachine *machine)
 
             if (def->disks[i]->bus == VIR_DOMAIN_DISK_BUS_IDE) {
                 VBOX_UTF8_TO_UTF16("IDE Controller", &storageCtlName);
-                storageBus = StorageBus_IDE;
+                devicePort = def->disks[i]->info.addr.drive.bus;
+                deviceSlot = def->disks[i]->info.addr.drive.unit;
             } else if (def->disks[i]->bus == VIR_DOMAIN_DISK_BUS_SATA) {
                 VBOX_UTF8_TO_UTF16("SATA Controller", &storageCtlName);
-                storageBus = StorageBus_SATA;
             } else if (def->disks[i]->bus == VIR_DOMAIN_DISK_BUS_SCSI) {
                 VBOX_UTF8_TO_UTF16("SCSI Controller", &storageCtlName);
-                storageBus = StorageBus_SCSI;
             } else if (def->disks[i]->bus == VIR_DOMAIN_DISK_BUS_FDC) {
                 VBOX_UTF8_TO_UTF16("Floppy Controller", &storageCtlName);
-                storageBus = StorageBus_Floppy;
-            }
-
-            /* get the device details i.e instance, port and slot */
-            if (!vboxGetDeviceDetails(def->disks[i]->dst,
-                                      maxPortPerInst,
-                                      maxSlotPerPort,
-                                      storageBus,
-                                      &deviceInst,
-                                      &devicePort,
-                                      &deviceSlot)) {
-                virReportError(VIR_ERR_INTERNAL_ERROR,
-                               _("can't get the port/slot number of "
-                                 "harddisk/dvd/floppy to be attached: "
-                                 "%s, rc=%08x"),
-                               src, (unsigned)rc);
-                VBOX_MEDIUM_RELEASE(medium);
-                vboxIIDUnalloc(&mediumUUID);
-                VBOX_UTF16_FREE(mediumFileUtf16);
-                continue;
+                devicePort = 0;
+                deviceSlot = def->disks[i]->info.addr.drive.unit;
             }
 
             /* attach the harddisk/dvd/Floppy to the storage controller */