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[libvirt] [PATCH 07/10] qemu: Build command line for the new address format



For any disk controller model which is not "lsilogic", the command
line will be like:

-drive file=/dev/sda,if=none,id=drive-scsi0-0-3-0,format=raw \
-device scsi-disk,bus=scsi0.0,channel=0,scsi-id=3,lun=0,i\
drive=drive-scsi0-0-3-0,id=scsi0-0-3-0

The relationship between the libvirt address attrs and the qdev
properties are (controller model is not "lsilogic"; strings
inside <> represent libvirt adress attrs):
  bus=scsi<controller>.0
  channel=<bus>
  scsi-id=<target>
  lun=<unit>

* src/qemu/qemu_command.h: (New param "virDomainDefPtr def"
  for function qemuBuildDriveDevStr; new param "virDomainDefPtr
  vmdef" for function qemuAssignDeviceDiskAlias. Both for
  virDomainDiskFindControllerModel's use).

* src/qemu/qemu_command.c:
  - New param "virDomainDefPtr def" for qemuAssignDeviceDiskAliasCustom.
    For virDomainDiskFindControllerModel's use, if the disk bus is "scsi"
    and the controller model is not "lsilogic", "target" is one part of
    the alias name.
  - According change on qemuAssignDeviceDiskAlias and qemuBuildDriveDevStr

* src/qemu/qemu_hotplug.c:
  - Changes to be consistent with declarations of qemuAssignDeviceDiskAlias
    qemuBuildDriveDevStr, and qemuBuildControllerDevStr.
---
 src/qemu/qemu_command.c |   96 ++++++++++++++++++++++++++++++++++++----------
 src/qemu/qemu_command.h |   10 +++--
 src/qemu/qemu_hotplug.c |   14 +++---
 3 files changed, 88 insertions(+), 32 deletions(-)

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index ba22127..a964a9b 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -463,15 +463,35 @@ static int qemuAssignDeviceDiskAliasFixed(virDomainDiskDefPtr disk)
 
 
 /* Our custom -drive naming scheme used with id= */
-static int qemuAssignDeviceDiskAliasCustom(virDomainDiskDefPtr disk)
+static int
+qemuAssignDeviceDiskAliasCustom(virDomainDefPtr def,
+                                virDomainDiskDefPtr disk)
 {
     const char *prefix = virDomainDiskBusTypeToString(disk->bus);
+    int controllerModel = -1;
+
     if (disk->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_DRIVE) {
-        if (virAsprintf(&disk->info.alias, "%s%d-%d-%d", prefix,
-                        disk->info.addr.drive.controller,
-                        disk->info.addr.drive.bus,
-                        disk->info.addr.drive.unit) < 0)
-            goto no_memory;
+        if (disk->bus == VIR_DOMAIN_DISK_BUS_SCSI) {
+            controllerModel =
+                virDomainDiskFindControllerModel(def, disk,
+                                                 VIR_DOMAIN_CONTROLLER_TYPE_SCSI);
+        }
+
+        if (disk->bus != VIR_DOMAIN_DISK_BUS_SCSI ||
+            controllerModel == VIR_DOMAIN_CONTROLLER_MODEL_SCSI_LSILOGIC) {
+            if (virAsprintf(&disk->info.alias, "%s%d-%d-%d", prefix,
+                            disk->info.addr.drive.controller,
+                            disk->info.addr.drive.bus,
+                            disk->info.addr.drive.unit) < 0)
+                goto no_memory;
+        } else {
+            if (virAsprintf(&disk->info.alias, "%s%d-%d-%d-%d", prefix,
+                            disk->info.addr.drive.controller,
+                            disk->info.addr.drive.bus,
+                            disk->info.addr.drive.target,
+                            disk->info.addr.drive.unit) < 0)
+                goto no_memory;
+        }
     } else {
         int idx = virDiskNameToIndex(disk->dst);
         if (virAsprintf(&disk->info.alias, "%s-disk%d", prefix, idx) < 0)
@@ -487,11 +507,13 @@ no_memory:
 
 
 int
-qemuAssignDeviceDiskAlias(virDomainDiskDefPtr def, virBitmapPtr qemuCaps)
+qemuAssignDeviceDiskAlias(virDomainDefPtr vmdef,
+                          virDomainDiskDefPtr def,
+                          virBitmapPtr qemuCaps)
 {
     if (qemuCapsGet(qemuCaps, QEMU_CAPS_DRIVE)) {
         if (qemuCapsGet(qemuCaps, QEMU_CAPS_DEVICE))
-            return qemuAssignDeviceDiskAliasCustom(def);
+            return qemuAssignDeviceDiskAliasCustom(vmdef, def);
         else
             return qemuAssignDeviceDiskAliasFixed(def);
     } else {
@@ -602,7 +624,7 @@ qemuAssignDeviceAliases(virDomainDefPtr def, virBitmapPtr qemuCaps)
     int i;
 
     for (i = 0; i < def->ndisks ; i++) {
-        if (qemuAssignDeviceDiskAlias(def->disks[i], qemuCaps) < 0)
+        if (qemuAssignDeviceDiskAlias(def, def->disks[i], qemuCaps) < 0)
             return -1;
     }
     if (qemuCapsGet(qemuCaps, QEMU_CAPS_NET_NAME) ||
@@ -2078,13 +2100,15 @@ error:
 
 
 char *
-qemuBuildDriveDevStr(virDomainDiskDefPtr disk,
+qemuBuildDriveDevStr(virDomainDefPtr def,
+                     virDomainDiskDefPtr disk,
                      int bootindex,
                      virBitmapPtr qemuCaps)
 {
     virBuffer opt = VIR_BUFFER_INITIALIZER;
     const char *bus = virDomainDiskQEMUBusTypeToString(disk->bus);
     int idx = virDiskNameToIndex(disk->dst);
+    int controller_model;
 
     if (idx < 0) {
         qemuReportError(VIR_ERR_INTERNAL_ERROR,
@@ -2096,7 +2120,8 @@ qemuBuildDriveDevStr(virDomainDiskDefPtr disk,
         /* make sure that both the bus and the qemu binary support
          *  type='lun' (SG_IO).
          */
-        if (disk->bus != VIR_DOMAIN_DISK_BUS_VIRTIO) {
+        if (disk->bus != VIR_DOMAIN_DISK_BUS_VIRTIO &&
+            disk->bus != VIR_DOMAIN_DISK_BUS_SCSI) {
             qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                             _("disk device='lun' is not supported for bus='%s'"),
                             bus);
@@ -2123,11 +2148,40 @@ qemuBuildDriveDevStr(virDomainDiskDefPtr disk,
                           disk->info.addr.drive.unit);
         break;
     case VIR_DOMAIN_DISK_BUS_SCSI:
-        virBufferAddLit(&opt, "scsi-disk");
-        virBufferAsprintf(&opt, ",bus=scsi%d.%d,scsi-id=%d",
-                          disk->info.addr.drive.controller,
-                          disk->info.addr.drive.bus,
-                          disk->info.addr.drive.unit);
+        controller_model =
+            virDomainDiskFindControllerModel(def, disk,
+                                             VIR_DOMAIN_CONTROLLER_TYPE_SCSI);
+        if (controller_model == VIR_DOMAIN_CONTROLLER_MODEL_SCSI_LSILOGIC) {
+            virBufferAddLit(&opt, "scsi-disk");
+            virBufferAsprintf(&opt, ",bus=scsi%d.%d,scsi-id=%d",
+                              disk->info.addr.drive.controller,
+                              disk->info.addr.drive.bus,
+                              disk->info.addr.drive.unit);
+        } else {
+            if (!qemuCapsGet(qemuCaps, QEMU_CAPS_SCSI_DISK_CHANNEL)) {
+                if (disk->info.addr.drive.target > 7) {
+                    qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                                    _("This QEMU doesn't support target "
+                                      "greater than 7"));
+                    goto error;
+                }
+
+                if ((disk->info.addr.drive.bus != disk->info.addr.drive.unit) &&
+                    (disk->info.addr.drive.bus != 0)) {
+                    qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                                    _("This QEMU only supports both bus and "
+                                      "unit are equal to 0"));
+                    goto error;
+                }
+            }
+
+            virBufferAddLit(&opt, "scsi-disk");
+            virBufferAsprintf(&opt, ",bus=scsi%d.0,channel=%d,scsi-id=%d,lun=%d",
+                              disk->info.addr.drive.controller,
+                              disk->info.addr.drive.bus,
+                              disk->info.addr.drive.target,
+                              disk->info.addr.drive.unit);
+        }
         break;
     case VIR_DOMAIN_DISK_BUS_SATA:
         virBufferAddLit(&opt, "ide-drive");
@@ -2323,6 +2377,7 @@ qemuBuildUSBControllerDevStr(virDomainControllerDefPtr def,
     int model, caps;
 
     model = def->model;
+
     if (model == -1)
         model = VIR_DOMAIN_CONTROLLER_MODEL_USB_PIIX3_UHCI;
 
@@ -2350,8 +2405,7 @@ qemuBuildUSBControllerDevStr(virDomainControllerDefPtr def,
 }
 
 char *
-qemuBuildControllerDevStr(virDomainDefPtr domainDef ATTRIBUTE_UNUSED,
-                          virDomainControllerDefPtr def,
+qemuBuildControllerDevStr(virDomainControllerDefPtr def,
                           virBitmapPtr qemuCaps,
                           int *nusbcontroller)
 {
@@ -4339,7 +4393,7 @@ qemuBuildCommandLine(virConnectPtr conn,
                     char *devstr;
 
                     virCommandAddArg(cmd, "-device");
-                    if (!(devstr = qemuBuildControllerDevStr(def, cont, qemuCaps, NULL)))
+                    if (!(devstr = qemuBuildControllerDevStr(cont, qemuCaps, NULL)))
                         goto error;
 
                     virCommandAddArg(cmd, devstr);
@@ -4358,7 +4412,7 @@ qemuBuildCommandLine(virConnectPtr conn,
                 virCommandAddArg(cmd, "-device");
 
                 char *devstr;
-                if (!(devstr = qemuBuildControllerDevStr(def, def->controllers[i], qemuCaps,
+                if (!(devstr = qemuBuildControllerDevStr(def->controllers[i], qemuCaps,
                                                          &usbcontroller)))
                     goto error;
 
@@ -4477,7 +4531,7 @@ qemuBuildCommandLine(virConnectPtr conn,
                 } else {
                     virCommandAddArg(cmd, "-device");
 
-                    if (!(optstr = qemuBuildDriveDevStr(disk, bootindex,
+                    if (!(optstr = qemuBuildDriveDevStr(def, disk, bootindex,
                                                         qemuCaps)))
                         goto error;
                     virCommandAddArg(cmd, optstr);
diff --git a/src/qemu/qemu_command.h b/src/qemu/qemu_command.h
index 2f8b5ba..4e2f5c0 100644
--- a/src/qemu/qemu_command.h
+++ b/src/qemu/qemu_command.h
@@ -90,14 +90,14 @@ char *qemuBuildFSStr(virDomainFSDefPtr fs,
                      virBitmapPtr qemuCaps);
 
 /* Current, best practice */
-char * qemuBuildDriveDevStr(virDomainDiskDefPtr disk,
+char * qemuBuildDriveDevStr(virDomainDefPtr def,
+                            virDomainDiskDefPtr disk,
                             int bootindex,
                             virBitmapPtr qemuCaps);
 char * qemuBuildFSDevStr(virDomainFSDefPtr fs,
                          virBitmapPtr qemuCaps);
 /* Current, best practice */
-char * qemuBuildControllerDevStr(virDomainDefPtr domainDef,
-                                 virDomainControllerDefPtr def,
+char * qemuBuildControllerDevStr(virDomainControllerDefPtr def,
                                  virBitmapPtr qemuCaps,
                                  int *nusbcontroller);
 
@@ -201,7 +201,9 @@ int  qemuAssignDevicePCISlots(virDomainDefPtr def, qemuDomainPCIAddressSetPtr ad
 int qemuAssignDeviceAliases(virDomainDefPtr def, virBitmapPtr qemuCaps);
 int qemuDomainNetVLAN(virDomainNetDefPtr def);
 int qemuAssignDeviceNetAlias(virDomainDefPtr def, virDomainNetDefPtr net, int idx);
-int qemuAssignDeviceDiskAlias(virDomainDiskDefPtr def, virBitmapPtr qemuCaps);
+int qemuAssignDeviceDiskAlias(virDomainDefPtr vmdef,
+                              virDomainDiskDefPtr def,
+                              virBitmapPtr qemuCaps);
 int qemuAssignDeviceHostdevAlias(virDomainDefPtr def, virDomainHostdevDefPtr hostdev, int idx);
 int qemuAssignDeviceControllerAlias(virDomainControllerDefPtr controller);
 int qemuAssignDeviceRedirdevAlias(virDomainDefPtr def, virDomainRedirdevDefPtr redirdev, int idx);
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index 3dd7c0a..d7842c6 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -226,13 +226,13 @@ int qemuDomainAttachPciDiskDevice(virConnectPtr conn,
         if (qemuDomainPCIAddressEnsureAddr(priv->pciaddrs, &disk->info) < 0)
             goto error;
         releaseaddr = true;
-        if (qemuAssignDeviceDiskAlias(disk, priv->qemuCaps) < 0)
+        if (qemuAssignDeviceDiskAlias(vm->def, disk, priv->qemuCaps) < 0)
             goto error;
 
         if (!(drivestr = qemuBuildDriveStr(conn, disk, false, priv->qemuCaps)))
             goto error;
 
-        if (!(devstr = qemuBuildDriveDevStr(disk, 0, priv->qemuCaps)))
+        if (!(devstr = qemuBuildDriveDevStr(NULL, disk, 0, priv->qemuCaps)))
             goto error;
     }
 
@@ -336,7 +336,7 @@ int qemuDomainAttachPciControllerDevice(struct qemud_driver *driver,
             goto cleanup;
         }
 
-        if (!(devstr = qemuBuildControllerDevStr(vm->def, controller, priv->qemuCaps, NULL))) {
+        if (!(devstr = qemuBuildControllerDevStr(controller, priv->qemuCaps, NULL))) {
             goto cleanup;
         }
     }
@@ -461,9 +461,9 @@ int qemuDomainAttachSCSIDisk(virConnectPtr conn,
     }
 
     if (qemuCapsGet(priv->qemuCaps, QEMU_CAPS_DEVICE)) {
-        if (qemuAssignDeviceDiskAlias(disk, priv->qemuCaps) < 0)
+        if (qemuAssignDeviceDiskAlias(vm->def, disk, priv->qemuCaps) < 0)
             goto error;
-        if (!(devstr = qemuBuildDriveDevStr(disk, 0, priv->qemuCaps)))
+        if (!(devstr = qemuBuildDriveDevStr(vm->def, disk, 0, priv->qemuCaps)))
             goto error;
     }
 
@@ -583,11 +583,11 @@ int qemuDomainAttachUsbMassstorageDevice(virConnectPtr conn,
     }
 
     if (qemuCapsGet(priv->qemuCaps, QEMU_CAPS_DEVICE)) {
-        if (qemuAssignDeviceDiskAlias(disk, priv->qemuCaps) < 0)
+        if (qemuAssignDeviceDiskAlias(vm->def, disk, priv->qemuCaps) < 0)
             goto error;
         if (!(drivestr = qemuBuildDriveStr(conn, disk, false, priv->qemuCaps)))
             goto error;
-        if (!(devstr = qemuBuildDriveDevStr(disk, 0, priv->qemuCaps)))
+        if (!(devstr = qemuBuildDriveDevStr(NULL, disk, 0, priv->qemuCaps)))
             goto error;
     }
 
-- 
1.7.7.3


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