virsh domxml-from-native to treat SCSI as the bus type for pseries by default

The bus type IDE being enum Zero, the bus type on pseries system appears as IDE for all the -hda/-cdrom and for disk drives with if="none" type. Pseries platform needs this to appear as SCSI instead of IDE. The ide being not supported, the explicit requests for ide devices will return an error.
Signed-off-by: NShivaprasad G Bhat <sbhat@linux.vnet.ibm.com>

src/qemu/qemu_command.c

@@ -10032,6 +10032,7 @@ error:
 static virDomainDiskDefPtr
 qemuParseCommandLineDisk(virDomainXMLOptionPtr xmlopt,
                          const char *val,
+                         virDomainDefPtr dom,
                          int nvirtiodisk,
                          bool old_style_ceph_args)
 {
@@ -10055,7 +10056,11 @@ qemuParseCommandLineDisk(virDomainXMLOptionPtr xmlopt,
     if (VIR_ALLOC(def) < 0)
         goto cleanup;
 
-    def->bus = VIR_DOMAIN_DISK_BUS_IDE;
+    if (((dom->os.arch == VIR_ARCH_PPC64) &&
+        dom->os.machine && STREQ(dom->os.machine, "pseries")))
+        def->bus = VIR_DOMAIN_DISK_BUS_SCSI;
+    else
+       def->bus = VIR_DOMAIN_DISK_BUS_IDE;
     def->device = VIR_DOMAIN_DISK_DEVICE_DISK;
     def->type = VIR_DOMAIN_DISK_TYPE_FILE;
 
@@ -10140,9 +10145,15 @@ qemuParseCommandLineDisk(virDomainXMLOptionPtr xmlopt,
                 def->type = VIR_DOMAIN_DISK_TYPE_FILE;
             }
         } else if (STREQ(keywords[i], "if")) {
-            if (STREQ(values[i], "ide"))
+            if (STREQ(values[i], "ide")) {
                 def->bus = VIR_DOMAIN_DISK_BUS_IDE;
-            else if (STREQ(values[i], "scsi"))
+                if (((dom->os.arch == VIR_ARCH_PPC64) &&
+                     dom->os.machine && STREQ(dom->os.machine, "pseries"))) {
+                    virReportError(VIR_ERR_INTERNAL_ERROR,
+                                   _("pseries systems do not support ide devices '%s'"), val);
+                    goto error;
+                }
+            } else if (STREQ(values[i], "scsi"))
                 def->bus = VIR_DOMAIN_DISK_BUS_SCSI;
             else if (STREQ(values[i], "virtio"))
                 def->bus = VIR_DOMAIN_DISK_BUS_VIRTIO;
@@ -11368,6 +11379,9 @@ qemuParseCommandLine(virCapsPtr qemuCaps,
                 disk->type = VIR_DOMAIN_DISK_TYPE_FILE;
             if (STREQ(arg, "-cdrom")) {
                 disk->device = VIR_DOMAIN_DISK_DEVICE_CDROM;
+                if (((def->os.arch == VIR_ARCH_PPC64) &&
+                    def->os.machine && STREQ(def->os.machine, "pseries")))
+                    disk->bus = VIR_DOMAIN_DISK_BUS_SCSI;
                 if (VIR_STRDUP(disk->dst, "hdc") < 0)
                     goto error;
                 disk->readonly = true;
@@ -11381,6 +11395,9 @@ qemuParseCommandLine(virCapsPtr qemuCaps,
                         disk->bus = VIR_DOMAIN_DISK_BUS_IDE;
                     else
                         disk->bus = VIR_DOMAIN_DISK_BUS_SCSI;
+                   if (((def->os.arch == VIR_ARCH_PPC64) &&
+                       def->os.machine && STREQ(def->os.machine, "pseries")))
+                       disk->bus = VIR_DOMAIN_DISK_BUS_SCSI;
                 }
                 if (VIR_STRDUP(disk->dst, arg + 1) < 0)
                     goto error;
@@ -11672,7 +11689,7 @@ qemuParseCommandLine(virCapsPtr qemuCaps,
             }
         } else if (STREQ(arg, "-drive")) {
             WANT_VALUE();
-            if (!(disk = qemuParseCommandLineDisk(xmlopt, val,
+            if (!(disk = qemuParseCommandLineDisk(xmlopt, val, def,
                                                   nvirtiodisk,
                                                   ceph_args != NULL)))
                 goto error;

tests/qemuargv2xmltest.c

@@ -249,6 +249,7 @@ mymain(void)
     DO_TEST("hyperv");
 
     DO_TEST("pseries-nvram");
+    DO_TEST("pseries-disk");
 
     DO_TEST("nosharepages");
 

tests/qemuxml2argvdata/qemuxml2argv-pseries-disk.args

+LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test QEMU_AUDIO_DRV=none \
+/usr/bin/qemu-system-ppc64 \
+-S -M pseries -m 512 -smp 1 \
+-no-acpi -boot c -usb \
+-boot c -hda /dev/HostVG/QEMUGuest1 -cdrom /root/boot.iso

tests/qemuxml2argvdata/qemuxml2argv-pseries-disk.xml

+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>87eedafe-eedc-4336-8130-ed9fe5dc90c8</uuid>
+  <memory unit='KiB'>524288</memory>
+  <currentMemory unit='KiB'>524288</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='ppc64' machine='pseries'>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-system-ppc64</emulator>
+    <disk type='block' device='disk'>
+      <driver name='qemu' type='raw'/>
+      <source dev='/dev/HostVG/QEMUGuest1'/>
+      <target dev='hda' bus='scsi'/>
+      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='cdrom'>
+      <driver name='qemu' type='raw'/>
+      <source file='/root/boot.iso'/>
+      <target dev='hdc' bus='scsi'/>
+      <readonly/>
+      <address type='drive' controller='0' bus='0' target='0' unit='2'/>
+    </disk>
+    <controller type='usb' index='0'/>
+    <controller type='scsi' index='0'/>
+    <controller type='pci' index='0' model='pci-root'/>
+    <input type='mouse' bus='ps2'/>
+    <graphics type='sdl'/>
+    <video>
+      <model type='cirrus' vram='9216' heads='1'/>
+    </video>
+    <memballoon model='virtio'/>
+  </devices>
+</domain>