qemu: Use the 'device_id' property of SCSI disks to avoid regressing

QEMU accidentally exposed the id of -drive (or same value as disk
serial, if provided) in one of the identifiers visible from the guest.

To avoid regression in case when -blockdev will be used we need to
always specify it ourselves.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>

src/qemu/qemu_command.c

@@ -1890,6 +1890,7 @@ qemuBuildDiskDeviceStr(const virDomainDef *def,
     const char *bus = virDomainDiskQEMUBusTypeToString(disk->bus);
     const char *contAlias;
     char *backendAlias = NULL;
+    char *scsiVPDDeviceId = NULL;
     int controllerModel;
 
     if (qemuCheckDiskConfig(disk, qemuCaps) < 0)
@@ -1979,6 +1980,21 @@ qemuBuildDiskDeviceStr(const virDomainDef *def,
                 virBufferAddLit(&opt, "scsi-cd");
             else
                 virBufferAddLit(&opt, "scsi-hd");
+
+            /* qemu historically used the name of -drive as one of the device
+             * ids in the Vital Product Data Device Identification page if
+             * disk serial was not set and the disk serial otherwise.
+             * To avoid a guest-visible regression we need to provide it
+             * ourselves especially for cases when -blockdev will be used */
+            if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_SCSI_DISK_DEVICE_ID)) {
+                if (disk->serial) {
+                    if (VIR_STRDUP(scsiVPDDeviceId, disk->serial) < 0)
+                        goto error;
+                } else {
+                    if (!(scsiVPDDeviceId = qemuAliasDiskDriveFromDisk(disk)))
+                        goto error;
+                }
+            }
         }
 
         if (!(contAlias = virDomainControllerAliasFind(def, VIR_DOMAIN_CONTROLLER_TYPE_SCSI,
@@ -2021,6 +2037,10 @@ qemuBuildDiskDeviceStr(const virDomainDef *def,
                               disk->info.addr.drive.target,
                               disk->info.addr.drive.unit);
         }
+
+        if (scsiVPDDeviceId)
+            virBufferStrcat(&opt, ",device_id=", scsiVPDDeviceId, NULL);
+
         break;
 
     case VIR_DOMAIN_DISK_BUS_SATA:

tests/qemuxml2argvdata/controller-virtio-scsi.x86_64-latest.args

@@ -30,20 +30,20 @@ file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
 -device virtio-scsi-pci,id=scsi3,max_sectors=512,bus=pci.0,addr=0x5 \
 -device virtio-scsi-pci,id=scsi4,ioeventfd=on,bus=pci.0,addr=0x6 \
 -drive file=/dev/HostVG/QEMUGuest1,format=raw,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,bootindex=1 \
+-device scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=0,\
+device_id=drive-scsi0-0-0-0,drive=drive-scsi0-0-0-0,id=scsi0-0-0-0,bootindex=1 \
 -drive file=/dev/HostVG/QEMUGuest2,format=raw,if=none,id=drive-scsi1-0-0-0 \
--device scsi-hd,bus=scsi1.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi1-0-0-0,\
-id=scsi1-0-0-0 \
+-device scsi-hd,bus=scsi1.0,channel=0,scsi-id=0,lun=0,\
+device_id=drive-scsi1-0-0-0,drive=drive-scsi1-0-0-0,id=scsi1-0-0-0 \
 -drive file=/dev/HostVG/QEMUGuest3,format=raw,if=none,id=drive-scsi2-0-0-0 \
--device scsi-hd,bus=scsi2.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi2-0-0-0,\
-id=scsi2-0-0-0 \
+-device scsi-hd,bus=scsi2.0,channel=0,scsi-id=0,lun=0,\
+device_id=drive-scsi2-0-0-0,drive=drive-scsi2-0-0-0,id=scsi2-0-0-0 \
 -drive file=/dev/HostVG/QEMUGuest4,format=raw,if=none,id=drive-scsi3-0-0-0 \
--device scsi-hd,bus=scsi3.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi3-0-0-0,\
-id=scsi3-0-0-0 \
+-device scsi-hd,bus=scsi3.0,channel=0,scsi-id=0,lun=0,\
+device_id=drive-scsi3-0-0-0,drive=drive-scsi3-0-0-0,id=scsi3-0-0-0 \
 -drive file=/dev/HostVG/QEMUGuest5,format=raw,if=none,id=drive-scsi4-0-0-0 \
--device scsi-hd,bus=scsi4.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi4-0-0-0,\
-id=scsi4-0-0-0 \
+-device scsi-hd,bus=scsi4.0,channel=0,scsi-id=0,lun=0,\
+device_id=drive-scsi4-0-0-0,drive=drive-scsi4-0-0-0,id=scsi4-0-0-0 \
 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7 \
 -sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,\
 resourcecontrol=deny \

tests/qemuxml2argvdata/disk-cache.x86_64-latest.args

@@ -35,8 +35,8 @@ cache=unsafe \
 write-cache=on \
 -drive file=/dev/HostVG/QEMUGuest1,format=qcow2,if=none,id=drive-scsi0-0-0,\
 cache=none \
--device scsi-hd,bus=scsi0.0,scsi-id=0,drive=drive-scsi0-0-0,id=scsi0-0-0,\
-write-cache=on \
+-device scsi-hd,bus=scsi0.0,scsi-id=0,device_id=drive-scsi0-0-0,\
+drive=drive-scsi0-0-0,id=scsi0-0-0,write-cache=on \
 -drive file=/dev/HostVG/QEMUGuest1,format=qcow2,if=none,id=drive-virtio-disk0,\
 cache=writethrough \
 -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x3,drive=drive-virtio-disk0,\

tests/qemuxml2argvdata/disk-scsi-device-auto.x86_64-latest.args

@@ -28,7 +28,8 @@ file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
 -drive file=/dev/HostVG/QEMUGuest1,format=raw,if=none,id=drive-ide0-0-0 \
 -device ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 \
 -drive file=/tmp/scsidisk.img,format=raw,if=none,id=drive-scsi0-0-0 \
--device scsi-hd,bus=scsi0.0,scsi-id=0,drive=drive-scsi0-0-0,id=scsi0-0-0 \
+-device scsi-hd,bus=scsi0.0,scsi-id=0,device_id=drive-scsi0-0-0,\
+drive=drive-scsi0-0-0,id=scsi0-0-0 \
 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3 \
 -sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,\
 resourcecontrol=deny \

tests/qemuxml2argvdata/disk-scsi.x86_64-latest.args

@@ -31,16 +31,18 @@ file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
 -drive file=/dev/HostVG/QEMUGuest1,format=raw,if=none,id=drive-ide0-0-0 \
 -device ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 \
 -drive file=/tmp/scsidisk.img,format=raw,if=none,id=drive-scsi0-0-0 \
--device scsi-hd,bus=scsi0.0,scsi-id=0,drive=drive-scsi0-0-0,id=scsi0-0-0 \
+-device scsi-hd,bus=scsi0.0,scsi-id=0,device_id=drive-scsi0-0-0,\
+drive=drive-scsi0-0-0,id=scsi0-0-0 \
 -drive file=/tmp/scsidisk2.img,format=raw,if=none,id=drive-scsi1-0-0-0 \
--device scsi-hd,bus=scsi1.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi1-0-0-0,\
-id=scsi1-0-0-0,serial=abcdefghijklmn \
+-device scsi-hd,bus=scsi1.0,channel=0,scsi-id=0,lun=0,device_id=abcdefghijklmn,\
+drive=drive-scsi1-0-0-0,id=scsi1-0-0-0,serial=abcdefghijklmn \
 -drive file=/tmp/scsidisk3.img,format=raw,if=none,id=drive-scsi2-0-0-0 \
--device scsi-hd,bus=scsi2.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi2-0-0-0,\
-id=scsi2-0-0-0,wwn=0x5000c50015ea71ac \
+-device scsi-hd,bus=scsi2.0,channel=0,scsi-id=0,lun=0,\
+device_id=drive-scsi2-0-0-0,drive=drive-scsi2-0-0-0,id=scsi2-0-0-0,\
+wwn=0x5000c50015ea71ac \
 -drive file=/tmp/scsidisk4.img,format=raw,if=none,id=drive-scsi3-0-0-0 \
--device scsi-hd,bus=scsi3.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi3-0-0-0,\
-id=scsi3-0-0-0 \
+-device scsi-hd,bus=scsi3.0,channel=0,scsi-id=0,lun=0,\
+device_id=drive-scsi3-0-0-0,drive=drive-scsi3-0-0-0,id=scsi3-0-0-0 \
 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 \
 -sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,\
 resourcecontrol=deny \

tests/qemuxml2argvdata/disk-shared.x86_64-latest.args

@@ -33,8 +33,9 @@ bootindex=1,write-cache=on,serial=XYZXYZXYZYXXYZYZYXYZY \
 readonly=on \
 -device ide-cd,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 \
 -drive file=/dev/scsi,format=raw,if=none,id=drive-scsi0-0-0-0,cache=none \
--device scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=0,share-rw=on,\
-drive=drive-scsi0-0-0-0,id=scsi0-0-0-0,write-cache=on \
+-device scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=0,\
+device_id=drive-scsi0-0-0-0,share-rw=on,drive=drive-scsi0-0-0-0,id=scsi0-0-0-0,\
+write-cache=on \
 -drive file=/dev/virtio,format=raw,if=none,id=drive-virtio-disk0,cache=none \
 -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x3,share-rw=on,\
 drive=drive-virtio-disk0,id=virtio-disk0,write-cache=on \

tests/qemuxml2argvdata/iothreads-virtio-scsi-pci.x86_64-latest.args

@@ -35,8 +35,8 @@ id=drive-virtio-disk1 \
 drive=drive-virtio-disk1,id=virtio-disk1 \
 -drive file=/var/lib/libvirt/images/iothrtest2.img,format=raw,if=none,\
 id=drive-scsi0-0-0-3 \
--device scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=3,drive=drive-scsi0-0-0-3,\
-id=scsi0-0-0-3 \
+-device scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=3,\
+device_id=drive-scsi0-0-0-3,drive=drive-scsi0-0-0-3,id=scsi0-0-0-3 \
 -sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,\
 resourcecontrol=deny \
 -msg timestamp=on