[libvirt] [PATCH] conf: Don't allow duplicated targets regardless of bus

[John Ferlan]

https://bugzilla.redhat.com/show_bug.cgi?id=1142631

Commit id 'e0e290552' added a check to determine if the same bus
had the same target value.  It seems that's not quite good enough
as the check should check the target name value regardless of bus type.

Also added a DO_TEST_DIFFERENT to exhibit the issue

Signed-off-by: John Ferlan <jferlan at redhat.com>
---
 src/conf/domain_conf.c                             |  3 +-
 .../qemuxml2argv-disk-same-targets.xml             | 35 ++++++++++++++++++++++
 tests/qemuxml2argvtest.c                           |  3 ++
 3 files changed, 39 insertions(+), 2 deletions(-)
 create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-disk-same-targets.xml

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index b10f6cd..7855bcb 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -12590,8 +12590,7 @@ virDomainDiskDefDstDuplicates(virDomainDefPtr def)
 
     for (i = 1; i < def->ndisks; i++) {
         for (j = 0; j < i; j++) {
-            if (def->disks[i]->bus == def->disks[j]->bus &&
-                STREQ(def->disks[i]->dst, def->disks[j]->dst)) {
+            if (STREQ(def->disks[i]->dst, def->disks[j]->dst)) {
                 virReportError(VIR_ERR_XML_ERROR,
                                _("target '%s' duplicated for disk sources "
                                  "'%s' and '%s'"),
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-disk-same-targets.xml b/tests/qemuxml2argvdata/qemuxml2argv-disk-same-targets.xml
new file mode 100644
index 0000000..3276ce5
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-disk-same-targets.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='disk'>
+      <source dev='/dev/HostVG/QEMUGuest1'/>
+      <target dev='hda' bus='ide'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <source file='/tmp/usbdisk.img'/>
+      <target dev='sda' bus='usb'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <source file='/tmp/idedisk.img'/>
+      <target dev='sda' bus='ide'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <source file='/tmp/scsidisk.img'/>
+      <target dev='sda' bus='scsi'/>
+    </disk>
+    <memballoon model='virtio'/>
+  </devices>
+</domain>
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index be82dd2..b066681 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -882,6 +882,9 @@ mymain(void)
             QEMU_CAPS_DEVICE);
     DO_TEST("disk-snapshot",
             QEMU_CAPS_DRIVE, QEMU_CAPS_DRIVE_CACHE_V2, QEMU_CAPS_DRIVE_FORMAT);
+    DO_TEST_FAILURE("disk-same-targets",
+                    QEMU_CAPS_DRIVE, QEMU_CAPS_DEVICE, QEMU_CAPS_SCSI_LSI,
+                    QEMU_CAPS_DEVICE_USB_STORAGE, QEMU_CAPS_NODEFCONFIG);
     DO_TEST("event_idx",
             QEMU_CAPS_DRIVE,
             QEMU_CAPS_VIRTIO_BLK_EVENT_IDX,
-- 
2.1.0