qemu: Use disk wwn in qemu command line

All of ide-drive, ide-hd, ide-cd, scsi-disk, scsi-hd, and scsi-cd
supports wwn property. (NB, scsi-block doesn't support to set wwn).

* src/qemu/qemu_command.c: Error out if underlying QEMU doesn't
support wwn property for the device; Set wwn for the device otherwise.

* tests/qemuxml2argvdata/qemuxml2argv-disk-ide-wwn.args: New test
* tests/qemuxml2argvdata/qemuxml2argv-disk-ide-wwn.xml: Likewise
* tests/qemuxml2argvdata/qemuxml2argv-disk-scsi-disk-wwn.args: Likewise
* tests/qemuxml2argvdata/qemuxml2argv-disk-scsi-disk-wwn.xml: Likewise
* tests/qemuxml2argvtest.c: Add the new tests.

src/qemu/qemu_command.c

@@ -2453,6 +2453,15 @@ qemuBuildDriveDevStr(virDomainDefPtr def,
         goto error;
     }
 
+    if (disk->wwn) {
+        if ((disk->bus != VIR_DOMAIN_DISK_BUS_IDE) &&
+            (disk->bus != VIR_DOMAIN_DISK_BUS_SCSI)) {
+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                           _("Only ide and scsi disk support wwn"));
+            goto error;
+        }
+    }
+
     if (disk->device == VIR_DOMAIN_DISK_DEVICE_LUN) {
         /* make sure that both the bus and the qemu binary support
          *  type='lun' (SG_IO).
@@ -2475,6 +2484,11 @@ qemuBuildDriveDevStr(virDomainDefPtr def,
                            _("disk device='lun' is not supported by this QEMU"));
             goto error;
         }
+        if (disk->wwn) {
+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                           _("Setting wwn is not supported for lun device"));
+            goto error;
+        }
     }
 
     switch (disk->bus) {
@@ -2485,6 +2499,14 @@ qemuBuildDriveDevStr(virDomainDefPtr def,
             goto error;
         }
 
+        if (disk->wwn &&
+            !qemuCapsGet(caps, QEMU_CAPS_IDE_DRIVE_WWN)) {
+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                           _("Setting wwn for ide disk is not supported "
+                             "by this QEMU"));
+            goto error;
+        }
+
         if (qemuCapsGet(caps, QEMU_CAPS_IDE_CD)) {
             if (disk->device == VIR_DOMAIN_DISK_DEVICE_CDROM)
                 virBufferAddLit(&opt, "ide-cd");
@@ -2508,6 +2530,14 @@ qemuBuildDriveDevStr(virDomainDefPtr def,
             }
         }
 
+        if (disk->wwn &&
+            !qemuCapsGet(caps, QEMU_CAPS_SCSI_DISK_WWN)) {
+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                           _("Setting wwn for scsi disk is not supported "
+                             "by this QEMU"));
+            goto error;
+        }
+
         controllerModel =
             virDomainDiskFindControllerModel(def, disk,
                                              VIR_DOMAIN_CONTROLLER_TYPE_SCSI);
@@ -2647,6 +2677,9 @@ qemuBuildDriveDevStr(virDomainDefPtr def,
                               disk->blockio.physical_block_size);
     }
 
+    if (disk->wwn)
+        virBufferAsprintf(&opt, ",wwn=%s", disk->wwn);
+
     if (virBufferError(&opt)) {
         virReportOOMError();
         goto error;

tests/qemuxml2argvdata/qemuxml2argv-disk-ide-wwn.args

@@ -0,0 +1,6 @@
+LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test \
+/usr/bin/qemu -S -M pc -m 214 -smp 1 -nographic -nodefaults \
+-monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c \
+-drive file=/dev/HostVG/QEMUGuest1,if=none,id=drive-ide0-0-1,serial=WD-WMAP9A966149 \
+-device ide-hd,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1,wwn=5000c50015ea71ad \
+-usb -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3

tests/qemuxml2argvdata/qemuxml2argv-disk-ide-wwn.xml

@@ -0,0 +1,28 @@
+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory unit='KiB'>219136</memory>
+  <currentMemory unit='KiB'>219136</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='i686' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu</emulator>
+    <disk type='block' device='disk'>
+      <source dev='/dev/HostVG/QEMUGuest1'/>
+      <target dev='hda' bus='ide'/>
+      <serial>WD-WMAP9A966149</serial>
+      <wwn>5000c50015ea71ad</wwn>
+      <address type='drive' controller='0' bus='0' target='0' unit='1'/>
+    </disk>
+    <controller type='usb' index='0'/>
+    <controller type='ide' index='0'/>
+    <memballoon model='virtio'/>
+  </devices>
+</domain>

tests/qemuxml2argvdata/qemuxml2argv-disk-scsi-disk-wwn.args

@@ -0,0 +1,10 @@
+LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test \
+/usr/bin/qemu -S -M pc -m 214 -smp 1 -nographic -nodefconfig -nodefaults \
+-monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c \
+-device virtio-scsi-pci,id=scsi0,bus=pci.0,addr=0x3 \
+-device lsi,id=scsi1,bus=pci.0,addr=0x4 \
+-drive file=/dev/HostVG/QEMUGuest1,if=none,id=drive-scsi0-0-1-0 \
+-device scsi-cd,bus=scsi0.0,channel=0,scsi-id=1,lun=0,drive=drive-scsi0-0-1-0,id=scsi0-0-1-0,wwn=5000c50015ea71ac \
+-drive file=/dev/HostVG/QEMUGuest2,if=none,id=drive-scsi0-0-0-0 \
+-device scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0-0-0-0,id=scsi0-0-0-0,wwn=5000c50015ea71ad \
+-usb -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5

tests/qemuxml2argvdata/qemuxml2argv-disk-scsi-disk-wwn.xml

@@ -0,0 +1,35 @@
+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory unit='KiB'>219136</memory>
+  <currentMemory unit='KiB'>219136</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='i686' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu</emulator>
+    <disk type='block' device='cdrom'>
+      <source dev='/dev/HostVG/QEMUGuest1'/>
+      <target dev='sda' bus='scsi'/>
+      <address type='drive' controller='0' bus='0' target='1' unit='0'/>
+      <serial>WD-WMAP9A966149</serial>
+      <wwn>5000c50015ea71ac</wwn>
+    </disk>
+    <disk type='block' device='disk'>
+      <source dev='/dev/HostVG/QEMUGuest2'/>
+      <target dev='sdb' bus='scsi'/>
+      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+      <wwn>5000c50015ea71ad</wwn>
+    </disk>
+    <controller type='usb' index='0'/>
+    <controller type='scsi' index='0' model='virtio-scsi'/>
+    <controller type='scsi' index='1' model='lsilogic'/>
+    <memballoon model='virtio'/>
+  </devices>
+</domain>

tests/qemuxml2argvtest.c

@@ -471,6 +471,10 @@ mymain(void)
     DO_TEST("disk-scsi-disk-split",
             QEMU_CAPS_DRIVE, QEMU_CAPS_DEVICE, QEMU_CAPS_NODEFCONFIG,
             QEMU_CAPS_SCSI_CD, QEMU_CAPS_SCSI_LSI, QEMU_CAPS_VIRTIO_SCSI_PCI);
+    DO_TEST("disk-scsi-disk-wwn",
+            QEMU_CAPS_DRIVE, QEMU_CAPS_DEVICE, QEMU_CAPS_NODEFCONFIG,
+            QEMU_CAPS_SCSI_CD, QEMU_CAPS_SCSI_LSI, QEMU_CAPS_VIRTIO_SCSI_PCI,
+            QEMU_CAPS_SCSI_DISK_WWN);
     DO_TEST("disk-scsi-vscsi",
             QEMU_CAPS_DRIVE, QEMU_CAPS_DEVICE, QEMU_CAPS_NODEFCONFIG);
     DO_TEST("disk-scsi-virtio-scsi",
@@ -802,6 +806,9 @@ mymain(void)
     DO_TEST("disk-ide-drive-split",
             QEMU_CAPS_DRIVE, QEMU_CAPS_DEVICE, QEMU_CAPS_NODEFCONFIG,
             QEMU_CAPS_IDE_CD);
+    DO_TEST("disk-ide-wwn",
+            QEMU_CAPS_DRIVE, QEMU_CAPS_DEVICE, QEMU_CAPS_IDE_CD,
+            QEMU_CAPS_DRIVE_SERIAL, QEMU_CAPS_IDE_DRIVE_WWN);
 
     DO_TEST("disk-geometry", QEMU_CAPS_DRIVE);
     DO_TEST("disk-blockio",