[libvirt] [PATCHv2 28/62] qemu: Add field to store QDEV path of a disk in private data
When using -blockdev you need to use the qdev path to refer to the disk
fronends. Add means for storing the path and getting it after restart.
Signed-off-by: Peter Krempa <pkrempa(a)redhat.com>
---
src/qemu/qemu_domain.c | 27 +++++++++++++++++++++++++++
src/qemu/qemu_domain.h | 2 ++
tests/qemustatusxml2xmldata/modern-in.xml | 3 +++
3 files changed, 32 insertions(+)
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 032ad80baa..3058ceca79 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -1065,6 +1065,7 @@ qemuDomainDiskPrivateDispose(void *obj)
VIR_FREE(priv->blockJobError);
virStorageSourceFree(priv->migrSource);
+ VIR_FREE(priv->backendQomName);
}
static virClassPtr qemuDomainStorageSourcePrivateClass;
@@ -2123,6 +2124,30 @@ qemuStorageSourcePrivateDataFormat(virStorageSourcePtr src,
}
+static int
+qemuDomainDiskPrivateParse(xmlXPathContextPtr ctxt,
+ virDomainDiskDefPtr disk)
+{
+ qemuDomainDiskPrivatePtr priv = QEMU_DOMAIN_DISK_PRIVATE(disk);
+
+ priv->backendQomName = virXPathString("string(./qom/@backend)", ctxt);
+
+ return 0;
+}
+
+
+static int
+qemuDomainDiskPrivateFormat(virDomainDiskDefPtr disk,
+ virBufferPtr buf)
+{
+ qemuDomainDiskPrivatePtr priv = QEMU_DOMAIN_DISK_PRIVATE(disk);
+
+ virBufferEscapeString(buf, "<qom backend='%s'/>\n",
priv->backendQomName);
+
+ return 0;
+}
+
+
static void
qemuDomainObjPrivateXMLFormatVcpus(virBufferPtr buf,
virDomainDefPtr def)
@@ -2973,6 +2998,8 @@ virDomainXMLPrivateDataCallbacks virQEMUDriverPrivateDataCallbacks =
{
.alloc = qemuDomainObjPrivateAlloc,
.free = qemuDomainObjPrivateFree,
.diskNew = qemuDomainDiskPrivateNew,
+ .diskParse = qemuDomainDiskPrivateParse,
+ .diskFormat = qemuDomainDiskPrivateFormat,
.vcpuNew = qemuDomainVcpuPrivateNew,
.chrSourceNew = qemuDomainChrSourcePrivateNew,
.vsockNew = qemuDomainVsockPrivateNew,
diff --git a/src/qemu/qemu_domain.h b/src/qemu/qemu_domain.h
index 5dcbdfbbe1..7d0b304727 100644
--- a/src/qemu/qemu_domain.h
+++ b/src/qemu/qemu_domain.h
@@ -396,6 +396,8 @@ struct _qemuDomainDiskPrivate {
/* information about the device */
bool tray; /* device has tray */
bool removable; /* device media can be removed/changed */
+
+ char *backendQomName; /* QOM path to the eligible block backend */
};
# define QEMU_DOMAIN_STORAGE_SOURCE_PRIVATE(src) \
diff --git a/tests/qemustatusxml2xmldata/modern-in.xml
b/tests/qemustatusxml2xmldata/modern-in.xml
index 4fb5f326c2..21d4faca66 100644
--- a/tests/qemustatusxml2xmldata/modern-in.xml
+++ b/tests/qemustatusxml2xmldata/modern-in.xml
@@ -331,6 +331,9 @@
<target dev='vdb' bus='virtio'/>
<alias name='virtio-disk1'/>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x0b' function='0x0'/>
+ <privateData>
+ <qom backend='virtio-disk1/virtio-backend'/>
+ </privateData>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
--
2.16.2