qemu: Generate command line of NVMe disks

Now, that we have everything prepared, we can generate command
line for NVMe disks.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>

src/qemu/qemu_block.c

@@ -977,6 +977,25 @@ qemuBlockStorageSourceGetVvfatProps(virStorageSourcePtr src,
 }
 
 
+static virJSONValuePtr
+qemuBlockStorageSourceGetNVMeProps(virStorageSourcePtr src)
+{
+    const virStorageSourceNVMeDef *nvme = src->nvme;
+    g_autofree char *pciAddr = NULL;
+    virJSONValuePtr ret = NULL;
+
+    if (!(pciAddr = virPCIDeviceAddressAsString(&nvme->pciAddr)))
+        return NULL;
+
+    ignore_value(virJSONValueObjectCreate(&ret,
+                                          "s:driver", "nvme",
+                                          "s:device", pciAddr,
+                                          "U:namespace", nvme->namespace,
+                                          NULL));
+    return ret;
+}
+
+
 static int
 qemuBlockStorageSourceGetBlockdevGetCacheProps(virStorageSourcePtr src,
                                                virJSONValuePtr props)
@@ -1059,8 +1078,12 @@ qemuBlockStorageSourceGetBackendProps(virStorageSourcePtr src,
             return NULL;
         break;
 
-    case VIR_STORAGE_TYPE_VOLUME:
     case VIR_STORAGE_TYPE_NVME:
+        if (!(fileprops = qemuBlockStorageSourceGetNVMeProps(src)))
+            return NULL;
+        break;
+
+    case VIR_STORAGE_TYPE_VOLUME:
     case VIR_STORAGE_TYPE_NONE:
     case VIR_STORAGE_TYPE_LAST:
         return NULL;

src/qemu/qemu_command.c

@@ -1525,6 +1525,9 @@ qemuDiskSourceNeedsProps(virStorageSourcePtr src,
         src->haveTLS == VIR_TRISTATE_BOOL_YES)
         return true;
 
+    if (actualType == VIR_STORAGE_TYPE_NVME)
+        return true;
+
     return false;
 }
 

src/qemu/qemu_process.c

@@ -5309,6 +5309,13 @@ qemuProcessStartValidateDisks(virDomainObjPtr vm,
                            _("PowerPC pseries machines do not support floppy device"));
             return -1;
         }
+
+        if (src->type == VIR_STORAGE_TYPE_NVME &&
+            !virQEMUCapsGet(qemuCaps, QEMU_CAPS_DRIVE_NVME)) {
+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                           _("NVMe disks are not supported with this QEMU binary"));
+            return -1;
+        }
     }
 
     return 0;

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

@@ -0,0 +1,63 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/tmp/lib/domain--1-QEMUGuest1 \
+USER=test \
+LOGNAME=test \
+XDG_DATA_HOME=/tmp/lib/domain--1-QEMUGuest1/.local/share \
+XDG_CACHE_HOME=/tmp/lib/domain--1-QEMUGuest1/.cache \
+XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
+QEMU_AUDIO_DRV=none \
+/usr/bin/qemu-system-i386 \
+-name guest=QEMUGuest1,debug-threads=on \
+-S \
+-object secret,id=masterKey0,format=raw,\
+file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-m 214 \
+-overcommit mem-lock=off \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
+-display none \
+-no-user-config \
+-nodefaults \
+-chardev socket,id=charmonitor,fd=1729,server,nowait \
+-mon chardev=charmonitor,id=monitor,mode=control \
+-rtc base=utc \
+-no-shutdown \
+-no-acpi \
+-boot strict=on \
+-device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 \
+-device virtio-scsi-pci,id=scsi0,bus=pci.0,addr=0x3 \
+-blockdev '{"driver":"nvme","device":"0000:01:00.0","namespace":1,\
+"node-name":"libvirt-4-storage","auto-read-only":true,"discard":"unmap"}' \
+-blockdev '{"node-name":"libvirt-4-format","read-only":false,"driver":"raw",\
+"file":"libvirt-4-storage"}' \
+-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x4,drive=libvirt-4-format,\
+id=virtio-disk0,bootindex=1 \
+-blockdev '{"driver":"nvme","device":"0000:01:00.0","namespace":2,\
+"node-name":"libvirt-3-storage","auto-read-only":true,"discard":"unmap"}' \
+-blockdev '{"node-name":"libvirt-3-format","read-only":false,"driver":"raw",\
+"file":"libvirt-3-storage"}' \
+-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=libvirt-3-format,\
+id=virtio-disk1 \
+-blockdev '{"driver":"nvme","device":"0000:02:00.0","namespace":1,\
+"node-name":"libvirt-2-storage","auto-read-only":true,"discard":"unmap"}' \
+-blockdev '{"node-name":"libvirt-2-format","read-only":false,"driver":"raw",\
+"file":"libvirt-2-storage"}' \
+-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x6,drive=libvirt-2-format,\
+id=virtio-disk2 \
+-object secret,id=libvirt-1-format-luks-secret0,\
+data=9eao5F8qtkGt+seB1HYivWIxbtwUu6MQtg1zpj/oDtUsPr1q8wBYM91uEHCn6j/1,\
+keyid=masterKey0,iv=AAECAwQFBgcICQoLDA0ODw==,format=base64 \
+-blockdev '{"driver":"nvme","device":"0001:02:00.0","namespace":2,\
+"node-name":"libvirt-1-storage","cache":{"direct":true,"no-flush":false},\
+"auto-read-only":true,"discard":"unmap"}' \
+-blockdev '{"node-name":"libvirt-1-format","read-only":false,\
+"cache":{"direct":true,"no-flush":false},"driver":"qcow2",\
+"encrypt":{"format":"luks","key-secret":"libvirt-1-format-luks-secret0"},\
+"file":"libvirt-1-storage"}' \
+-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x7,drive=libvirt-1-format,\
+id=virtio-disk3,write-cache=on \
+-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,\
+resourcecontrol=deny \
+-msg timestamp=on

tests/qemuxml2argvtest.c

@@ -1081,6 +1081,7 @@ mymain(void)
     driver.config->vxhsTLS = 0;
     VIR_FREE(driver.config->vxhsTLSx509certdir);
     DO_TEST("disk-no-boot", NONE);
+    DO_TEST_CAPS_LATEST("disk-nvme");
     DO_TEST_PARSE_ERROR("disk-device-lun-type-invalid",
                         QEMU_CAPS_VIRTIO_SCSI);
     DO_TEST_CAPS_LATEST_PARSE_ERROR("disk-attaching-partition-nosupport");