6:27 a.m.
v2:
- patch 1/7 from last time was pushed
- XML changes:
- top level element renamed to "qemu:override" to accomodate
possible extension in the future
- wrapped 'qemu:props' meant to override the frontend under a
'qemu:frontend' element
- code changes:
- renamed few bits (dropped 'Device') from code that can theoretically be
reused
- split out some functions for enhanced extensibility in the future
Peter Krempa (6):
docs: drvqemu: Document overriding of device properties
qemu: domain: Add XML namespace code for overriding device config
conf: Introduce VIR_DOMAIN_TAINT_CUSTOM_DEVICE and use it in qemu
qemuBuildDeviceCommandlineFromJSON: Pass 'virDomainDef' into the
function
qemu: command: Override device definition according to the namespace
config
NEWS: Mention the qemu device property override feature
NEWS.rst | 7 +
docs/drvqemu.rst | 57 +++++
src/conf/domain_conf.c | 2 +
src/conf/domain_conf.h | 1 +
src/conf/schemas/domaincommon.rng | 42 ++++
src/qemu/qemu_command.c | 133 +++++++----
src/qemu/qemu_domain.c | 221 ++++++++++++++++++
src/qemu/qemu_domain.h | 33 +++
.../qemu-ns.x86_64-4.0.0.args | 2 +-
.../qemu-ns.x86_64-latest.args | 2 +-
tests/qemuxml2argvdata/qemu-ns.xml | 14 ++
.../qemu-ns.x86_64-latest.xml | 14 ++
12 files changed, 478 insertions(+), 50 deletions(-)
--
2.35.1
6:27 a.m.
New subject: [PATCH v2 1/6] docs: drvqemu: Document overriding of device properties
Upcoming patches will add possibility to override configuration of a
device with custom properties as a more versatile replacement to using
QEMU's '-set' parameter, which doesn't work when we use JSON to
instantiate devices.
Describe the XML used for the override as well as expectations of
upstream support in case something breaks.
Signed-off-by: Peter Krempa <pkrempa(a)redhat.com>
---
docs/drvqemu.rst | 57 ++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 57 insertions(+)
diff --git a/docs/drvqemu.rst b/docs/drvqemu.rst
index 9d7dd2656b..afc499ad50 100644
--- a/docs/drvqemu.rst
+++ b/docs/drvqemu.rst
@@ -580,6 +580,63 @@ reconfigure libvirtd.
*DO NOT* use in production.
+Overriding properties of QEMU devices
+-------------------------------------
+
+For development or testing the ``<qemu:override>`` tag allows to override
+specific properties of devices instantiated by libvirt.
+
+The ``<qemu:device>`` sub-element groups overrides for a device identified via
+the ``alias`` attribute. The alias corresponds to the ``<alias name=''>``
+property of a device. It's strongly recommended to use user-specified aliases
+for devices with overriden properties.
+
+Sub element ``<qemu:frontend>`` encapsulates all overrides of properties for the
+device frontend and overrides what libvirt formats via ``-device``.
+:since:`Since 8.2.0`.
+
+The individual properties are overriden by a ``<qemu:property>`` element. The
+``name`` specifies the name of the property to override. In case when libvirt
+doesn't configure the property a property with the name is added to the
+commandline. The ``type`` attribute specifies a type of the argument used. The
+type must correspond with the type that is expected by QEMU. Supported values
+for the type attribute are: ``string``, ``number``, ``bool`` (allowed values for
+``bool`` are ``true`` and ``false``) and ``remove``. The ``remove`` type is
+special and instructs libvirt to remove the property without replacement.
+
+The overrides are applied only to initial device configuration passed to QEMU
+via the commandline. Later hotplug operations will not apply any modifications.
+
+Configuring override for a device alias which is not used or attempting to
+remove a device property which is not formatted by libvirt will cause failure
+to startup the VM.
+
+*Note:* The libvirt project doesn't guarantee any form of compatibility and
+stability of devices with overriden properties. The domain is tainted when
+such configuration is used.
+
+Example:
+
+::
+
+ <domain type='kvm'
xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
+ <name>testvm</name>
+
+ [...]
+
+ <qemu:override>
+ <qemu:device alias='ua-devalias'>
+ <qemu:frontend>
+ <qemu:property name='propname1' type='string'
value='test'/>
+ <qemu:property name='propname2' type='unsigned'
value='123'/>
+ <qemu:property name='propname2' type='signed'
value='-123'/>
+ <qemu:property name='propname3' type='bool'
value='false'/>
+ <qemu:property name='propname4' type='remove'/>
+ </qemu:frontend>
+ </qemu:device>
+ </qemu:override>
+ </domain>
+
Example domain XML config
-------------------------
--
2.35.1
6:27 a.m.
New subject: [PATCH v2 2/6] qemu: domain: Add XML namespace code for overriding device config
Implement the XML parser and formatter for overriding of device
properties such as:
<qemu:override>
<qemu:device alias='ua-disk'>
<qemu:frontend>
<qemu:property name='prop1' type='string'
value='propval1'/>
<qemu:property name='prop2' type='signed'
value='-321'/>
<qemu:property name='prop3' type='unsigned'
value='123'/>
<qemu:property name='prop4' type='bool'
value='true'/>
<qemu:property name='prop5' type='bool'
value='false'/>
<qemu:property name='prop6' type='bool'
value='false'/>
<qemu:property name='prop6' type='remove'/>
</qemu:frontend>
</qemu:device>
</qemu:override>
Signed-off-by: Peter Krempa <pkrempa(a)redhat.com>
---
src/conf/schemas/domaincommon.rng | 42 ++++
src/qemu/qemu_domain.c | 218 ++++++++++++++++++
src/qemu/qemu_domain.h | 33 +++
.../qemu-ns.x86_64-4.0.0.args | 2 +-
.../qemu-ns.x86_64-latest.args | 2 +-
tests/qemuxml2argvdata/qemu-ns.xml | 14 ++
.../qemu-ns.x86_64-latest.xml | 14 ++
7 files changed, 323 insertions(+), 2 deletions(-)
diff --git a/src/conf/schemas/domaincommon.rng b/src/conf/schemas/domaincommon.rng
index 9c1b64a644..8ca6bee81f 100644
--- a/src/conf/schemas/domaincommon.rng
+++ b/src/conf/schemas/domaincommon.rng
@@ -80,6 +80,9 @@
<optional>
<ref name="qemudeprecation"/>
</optional>
+ <optional>
+ <ref name="qemuoverride"/>
+ </optional>
<optional>
<ref name="lxcsharens"/>
</optional>
@@ -7553,6 +7556,45 @@
</element>
</define>
+ <define name="qemuoverrideproperty">
+ <element name="property"
ns="http://libvirt.org/schemas/domain/qemu/1.0">
+ <attribute name="name"/>
+ <attribute name="type">
+ <choice>
+ <value>string</value>
+ <value>signed</value>
+ <value>unsigned</value>
+ <value>bool</value>
+ <value>remove</value>
+ </choice>
+ </attribute>
+ <optional>
+ <attribute name="value"/>
+ </optional>
+ </element>
+ </define>
+
+ <define name="qemuoverride">
+ <element name="override"
ns="http://libvirt.org/schemas/domain/qemu/1.0">
+ <interleave>
+ <zeroOrMore>
+ <element name="device">
+ <attribute name="alias"/>
+ <interleave>
+ <optional>
+ <element name="frontend">
+ <zeroOrMore>
+ <ref name="qemuoverrideproperty"/>
+ </zeroOrMore>
+ </element>
+ </optional>
+ </interleave>
+ </element>
+ </zeroOrMore>
+ </interleave>
+ </element>
+ </define>
+
<!--
Optional hypervisor extensions in their own namespace:
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 3bf864bc5d..636e58061e 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -3181,6 +3181,23 @@ qemuDomainXmlNsDefFree(qemuDomainXmlNsDef *def)
g_free(def->deprecationBehavior);
+ for (i = 0; i < def->ndeviceOverride; i++) {
+ size_t j;
+ g_free(def->deviceOverride[i].alias);
+
+ for (j = 0; j < def->deviceOverride[i].nfrontend; j++) {
+ qemuDomainXmlNsOverrideProperty *prop = def->deviceOverride[i].frontend +
j;
+
+ g_free(prop->name);
+ g_free(prop->value);
+ virJSONValueFree(prop->json);
+ }
+
+ g_free(def->deviceOverride[i].frontend);
+ }
+
+ g_free(def->deviceOverride);
+
g_free(def);
}
@@ -3319,6 +3336,159 @@ qemuDomainDefNamespaceParseCaps(qemuDomainXmlNsDef *nsdef,
return 0;
}
+VIR_ENUM_IMPL(qemuDomainXmlNsOverride,
+ QEMU_DOMAIN_XML_NS_OVERRIDE_LAST,
+ "",
+ "string",
+ "signed",
+ "unsigned",
+ "bool",
+ "remove",
+ );
+
+
+static int
+qemuDomainDefNamespaceParseOverrideProperties(qemuDomainXmlNsOverrideProperty *props,
+ xmlNodePtr *propnodes,
+ size_t npropnodes)
+{
+ size_t i;
+
+ for (i = 0; i < npropnodes; i++) {
+ qemuDomainXmlNsOverrideProperty *prop = props + i;
+ unsigned long long ull;
+ long long ll;
+ bool b;
+
+ if (!(prop->name = virXMLPropString(propnodes[i], "name"))) {
+ virReportError(VIR_ERR_XML_ERROR, "%s",
+ _("missing 'name' attribute for
qemu:property"));
+ return -1;
+ }
+
+ if (STREQ(prop->name, "id")) {
+ virReportError(VIR_ERR_XML_ERROR, "%s",
+ _("property with name 'id' can't be
overriden"));
+ return -1;
+ }
+
+ if (virXMLPropEnum(propnodes[i], "type",
+ qemuDomainXmlNsOverrideTypeFromString,
+ VIR_XML_PROP_REQUIRED | VIR_XML_PROP_NONZERO,
+ &prop->type) < 0)
+ return -1;
+
+ if (!(prop->value = virXMLPropString(propnodes[i], "value"))) {
+ if (prop->type != QEMU_DOMAIN_XML_NS_OVERRIDE_REMOVE) {
+ virReportError(VIR_ERR_XML_ERROR, "%s",
+ _("missing 'value' attribute for
'qemu:property'"));
+ return -1;
+ }
+ }
+
+ switch (prop->type) {
+ case QEMU_DOMAIN_XML_NS_OVERRIDE_STRING:
+ prop->json = virJSONValueNewString(g_strdup(prop->value));
+ break;
+
+ case QEMU_DOMAIN_XML_NS_OVERRIDE_SIGNED:
+ if (virStrToLong_ll(prop->value, NULL, 10, &ll) < 0) {
+ virReportError(VIR_ERR_XML_ERROR,
+ _("invalid value '%s' of 'value'
attribute of 'qemu:property'"),
+ prop->value);
+ return -1;
+ }
+ prop->json = virJSONValueNewNumberLong(ll);
+ break;
+
+ case QEMU_DOMAIN_XML_NS_OVERRIDE_UNSIGNED:
+ if (virStrToLong_ullp(prop->value, NULL, 10, &ull) < 0) {
+ virReportError(VIR_ERR_XML_ERROR,
+ _("invalid value '%s' of 'value'
attribute of 'qemu:property'"),
+ prop->value);
+ return -1;
+ }
+ prop->json = virJSONValueNewNumberUlong(ull);
+ break;
+
+ case QEMU_DOMAIN_XML_NS_OVERRIDE_BOOL:
+ if (STRNEQ(prop->value, "true") &&
STRNEQ(prop->value, "false")) {
+ virReportError(VIR_ERR_XML_ERROR,
+ _("invalid value '%s' of 'value'
attribute of 'qemu:property'"),
+ prop->value);
+ return -1;
+ }
+
+ b = STREQ(prop->value, "true");
+ prop->json = virJSONValueNewBoolean(b);
+ break;
+
+ case QEMU_DOMAIN_XML_NS_OVERRIDE_REMOVE:
+ if (prop->value) {
+ virReportError(VIR_ERR_XML_ERROR, "%s",
+ _("setting 'value' attribute of
'qemu:property' doesn't make sense with 'remove' type"));
+ return -1;
+ }
+ break;
+
+ case QEMU_DOMAIN_XML_NS_OVERRIDE_NONE:
+ case QEMU_DOMAIN_XML_NS_OVERRIDE_LAST:
+ virReportEnumRangeError(qemuDomainXmlNsOverrideType, prop->type);
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+
+static int
+qemuDomainDefNamespaceParseDeviceOverride(qemuDomainXmlNsDef *nsdef,
+ xmlXPathContextPtr ctxt)
+{
+ g_autofree xmlNodePtr *devicenodes = NULL;
+ ssize_t ndevicenodes;
+ size_t i;
+
+ if ((ndevicenodes = virXPathNodeSet("./qemu:override/qemu:device", ctxt,
&devicenodes)) < 0)
+ return -1;
+
+ if (ndevicenodes == 0)
+ return 0;
+
+ nsdef->deviceOverride = g_new0(qemuDomainXmlNsDeviceOverride, ndevicenodes);
+ nsdef->ndeviceOverride = ndevicenodes;
+
+ for (i = 0; i < ndevicenodes; i++) {
+ qemuDomainXmlNsDeviceOverride *n = nsdef->deviceOverride + i;
+ g_autofree xmlNodePtr *propnodes = NULL;
+ ssize_t npropnodes;
+ VIR_XPATH_NODE_AUTORESTORE(ctxt);
+
+ ctxt->node = devicenodes[i];
+
+ if (!(n->alias = virXMLPropString(devicenodes[i], "alias"))) {
+ virReportError(VIR_ERR_XML_ERROR, "%s",
+ _("missing 'alias' attribute for
qemu:device"));
+ return -1;
+ }
+
+ if ((npropnodes = virXPathNodeSet("./qemu:frontend/qemu:property",
ctxt, &propnodes)) < 0)
+ return -1;
+
+ if (npropnodes == 0)
+ continue;
+
+ n->frontend = g_new0(qemuDomainXmlNsOverrideProperty, npropnodes);
+ n->nfrontend = npropnodes;
+
+ if (qemuDomainDefNamespaceParseOverrideProperties(n->frontend, propnodes,
npropnodes) < 0)
+ return -1;
+ }
+
+ return 0;
+}
+
static int
qemuDomainDefNamespaceParse(xmlXPathContextPtr ctxt,
@@ -3331,6 +3501,7 @@ qemuDomainDefNamespaceParse(xmlXPathContextPtr ctxt,
if (qemuDomainDefNamespaceParseCommandlineArgs(nsdata, ctxt) < 0 ||
qemuDomainDefNamespaceParseCommandlineEnv(nsdata, ctxt) < 0 ||
+ qemuDomainDefNamespaceParseDeviceOverride(nsdata, ctxt) < 0 ||
qemuDomainDefNamespaceParseCaps(nsdata, ctxt) < 0)
goto cleanup;
@@ -3386,6 +3557,52 @@ qemuDomainDefNamespaceFormatXMLCaps(virBuffer *buf,
}
+static void
+qemuDomainDefNamespaceFormatXMLOverrideProperties(virBuffer *buf,
+ qemuDomainXmlNsOverrideProperty
*props,
+ size_t nprops)
+{
+ size_t i;
+
+ for (i = 0; i < nprops; i++) {
+ g_auto(virBuffer) propAttrBuf = VIR_BUFFER_INITIALIZER;
+ qemuDomainXmlNsOverrideProperty *prop = props + i;
+
+ virBufferEscapeString(&propAttrBuf, " name='%s'",
prop->name);
+ virBufferAsprintf(&propAttrBuf, " type='%s'",
+ qemuDomainXmlNsOverrideTypeToString(prop->type));
+ virBufferEscapeString(&propAttrBuf, " value='%s'",
prop->value);
+
+ virXMLFormatElement(buf, "qemu:property", &propAttrBuf, NULL);
+ }
+}
+
+
+static void
+qemuDomainDefNamespaceFormatXMLOverride(virBuffer *buf,
+ qemuDomainXmlNsDef *xmlns)
+{
+ g_auto(virBuffer) childBuf = VIR_BUFFER_INIT_CHILD(buf);
+ size_t i;
+
+ for (i = 0; i < xmlns->ndeviceOverride; i++) {
+ qemuDomainXmlNsDeviceOverride *device = xmlns->deviceOverride + i;
+ g_auto(virBuffer) deviceAttrBuf = VIR_BUFFER_INITIALIZER;
+ g_auto(virBuffer) deviceChildBuf = VIR_BUFFER_INIT_CHILD(&childBuf);
+ g_auto(virBuffer) frontendChildBuf = VIR_BUFFER_INIT_CHILD(&deviceChildBuf);
+
+ virBufferEscapeString(&deviceAttrBuf, " alias='%s'",
device->alias);
+
+ qemuDomainDefNamespaceFormatXMLOverrideProperties(&frontendChildBuf,
device->frontend, device->nfrontend);
+ virXMLFormatElement(&deviceChildBuf, "qemu:frontend", NULL,
&frontendChildBuf);
+
+ virXMLFormatElement(&childBuf, "qemu:device", &deviceAttrBuf,
&deviceChildBuf);
+ }
+
+ virXMLFormatElement(buf, "qemu:override", NULL, &childBuf);
+}
+
+
static int
qemuDomainDefNamespaceFormatXML(virBuffer *buf,
void *nsdata)
@@ -3394,6 +3611,7 @@ qemuDomainDefNamespaceFormatXML(virBuffer *buf,
qemuDomainDefNamespaceFormatXMLCommandline(buf, cmd);
qemuDomainDefNamespaceFormatXMLCaps(buf, cmd);
+ qemuDomainDefNamespaceFormatXMLOverride(buf, cmd);
virBufferEscapeString(buf, "<qemu:deprecation
behavior='%s'/>\n",
cmd->deprecationBehavior);
diff --git a/src/qemu/qemu_domain.h b/src/qemu/qemu_domain.h
index edafb585b3..85adb6a5ba 100644
--- a/src/qemu/qemu_domain.h
+++ b/src/qemu/qemu_domain.h
@@ -443,6 +443,36 @@ struct _qemuDomainXmlNsEnvTuple {
char *value;
};
+
+typedef enum {
+ QEMU_DOMAIN_XML_NS_OVERRIDE_NONE,
+ QEMU_DOMAIN_XML_NS_OVERRIDE_STRING,
+ QEMU_DOMAIN_XML_NS_OVERRIDE_SIGNED,
+ QEMU_DOMAIN_XML_NS_OVERRIDE_UNSIGNED,
+ QEMU_DOMAIN_XML_NS_OVERRIDE_BOOL,
+ QEMU_DOMAIN_XML_NS_OVERRIDE_REMOVE,
+
+ QEMU_DOMAIN_XML_NS_OVERRIDE_LAST
+} qemuDomainXmlNsOverrideType;
+VIR_ENUM_DECL(qemuDomainXmlNsOverride);
+
+typedef struct _qemuDomainXmlNsOverrideProperty qemuDomainXmlNsOverrideProperty;
+struct _qemuDomainXmlNsOverrideProperty {
+ char *name;
+ qemuDomainXmlNsOverrideType type;
+ char *value;
+ virJSONValue *json;
+};
+
+typedef struct _qemuDomainXmlNsDeviceOverride qemuDomainXmlNsDeviceOverride;
+struct _qemuDomainXmlNsDeviceOverride {
+ char *alias;
+
+ size_t nfrontend;
+ qemuDomainXmlNsOverrideProperty *frontend;
+};
+
+
typedef struct _qemuDomainXmlNsDef qemuDomainXmlNsDef;
struct _qemuDomainXmlNsDef {
char **args;
@@ -458,6 +488,9 @@ struct _qemuDomainXmlNsDef {
* starting the VM to avoid any form of errors in the parser or when
* changing qemu versions. The knob is mainly for development/CI purposes */
char *deprecationBehavior;
+
+ size_t ndeviceOverride;
+ qemuDomainXmlNsDeviceOverride *deviceOverride;
};
diff --git a/tests/qemuxml2argvdata/qemu-ns.x86_64-4.0.0.args
b/tests/qemuxml2argvdata/qemu-ns.x86_64-4.0.0.args
index 5105f410ce..236f984a90 100644
--- a/tests/qemuxml2argvdata/qemu-ns.x86_64-4.0.0.args
+++ b/tests/qemuxml2argvdata/qemu-ns.x86_64-4.0.0.args
@@ -31,7 +31,7 @@ BAR='' \
-device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 \
-blockdev
'{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest1","node-name":"libvirt-1-storage","auto-read-only":true,"discard":"unmap"}'
\
-blockdev
'{"node-name":"libvirt-1-format","read-only":false,"driver":"raw","file":"libvirt-1-storage"}'
\
--device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ide0-0-0,bootindex=1 \
+-device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ua-disk,bootindex=1 \
-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x2 \
-unknown parameter \
-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
diff --git a/tests/qemuxml2argvdata/qemu-ns.x86_64-latest.args
b/tests/qemuxml2argvdata/qemu-ns.x86_64-latest.args
index 05ccade7e4..c0bf45000f 100644
--- a/tests/qemuxml2argvdata/qemu-ns.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/qemu-ns.x86_64-latest.args
@@ -33,7 +33,7 @@ BAR='' \
-device
'{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}'
\
-blockdev
'{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest1","node-name":"libvirt-1-storage","auto-read-only":true,"discard":"unmap"}'
\
-blockdev
'{"node-name":"libvirt-1-format","read-only":false,"driver":"raw","file":"libvirt-1-storage"}'
\
--device
'{"driver":"ide-hd","bus":"ide.0","unit":0,"drive":"libvirt-1-format","id":"ide0-0-0","bootindex":1}'
\
+-device
'{"driver":"ide-hd","bus":"ide.0","unit":0,"drive":"libvirt-1-format","id":"ua-disk","bootindex":1}'
\
-audiodev
'{"id":"audio1","driver":"none"}' \
-device
'{"driver":"virtio-balloon-pci","id":"balloon0","bus":"pci.0","addr":"0x2"}'
\
-unknown parameter \
diff --git a/tests/qemuxml2argvdata/qemu-ns.xml b/tests/qemuxml2argvdata/qemu-ns.xml
index 9d2f5502e9..36bf582dec 100644
--- a/tests/qemuxml2argvdata/qemu-ns.xml
+++ b/tests/qemuxml2argvdata/qemu-ns.xml
@@ -17,6 +17,7 @@
<disk type='block' device='disk'>
<source dev='/dev/HostVG/QEMUGuest1'/>
<target dev='hda' bus='ide'/>
+ <alias name='ua-disk'/>
<address type='drive' controller='0' bus='0'
target='0' unit='0'/>
</disk>
<controller type='ide' index='0'/>
@@ -32,5 +33,18 @@
<qemu:add capability="blockdev"/>
<qemu:del capability="name"/>
</qemu:capabilities>
+ <qemu:override>
+ <qemu:device alias='ua-disk'>
+ <qemu:frontend>
+ <qemu:property name='prop1' type='string'
value='propval1'/>
+ <qemu:property name='prop2' type='signed'
value='-321'/>
+ <qemu:property name='prop3' type='unsigned'
value='123'/>
+ <qemu:property name='prop4' type='bool'
value='true'/>
+ <qemu:property name='prop5' type='bool'
value='false'/>
+ <qemu:property name='prop6' type='bool'
value='false'/>
+ <qemu:property name='prop6' type='remove'/>
+ </qemu:frontend>
+ </qemu:device>
+ </qemu:override>
<qemu:deprecation behavior='crash'/>
</domain>
diff --git a/tests/qemuxml2xmloutdata/qemu-ns.x86_64-latest.xml
b/tests/qemuxml2xmloutdata/qemu-ns.x86_64-latest.xml
index 674525d033..a8998ae582 100644
--- a/tests/qemuxml2xmloutdata/qemu-ns.x86_64-latest.xml
+++ b/tests/qemuxml2xmloutdata/qemu-ns.x86_64-latest.xml
@@ -21,6 +21,7 @@
<driver name='qemu' type='raw'/>
<source dev='/dev/HostVG/QEMUGuest1'/>
<target dev='hda' bus='ide'/>
+ <alias name='ua-disk'/>
<address type='drive' controller='0' bus='0'
target='0' unit='0'/>
</disk>
<controller type='ide' index='0'>
@@ -48,5 +49,18 @@
<qemu:add capability='blockdev'/>
<qemu:del capability='name'/>
</qemu:capabilities>
+ <qemu:override>
+ <qemu:device alias='ua-disk'>
+ <qemu:frontend>
+ <qemu:property name='prop1' type='string'
value='propval1'/>
+ <qemu:property name='prop2' type='signed'
value='-321'/>
+ <qemu:property name='prop3' type='unsigned'
value='123'/>
+ <qemu:property name='prop4' type='bool'
value='true'/>
+ <qemu:property name='prop5' type='bool'
value='false'/>
+ <qemu:property name='prop6' type='bool'
value='false'/>
+ <qemu:property name='prop6' type='remove'/>
+ </qemu:frontend>
+ </qemu:device>
+ </qemu:override>
<qemu:deprecation behavior='crash'/>
</domain>
--
2.35.1
6:27 a.m.
New subject: [PATCH v2 3/6] conf: Introduce VIR_DOMAIN_TAINT_CUSTOM_DEVICE and use it in qemu
Taint the domain object when the user requests custom device properties.
Signed-off-by: Peter Krempa <pkrempa(a)redhat.com>
---
src/conf/domain_conf.c | 2 ++
src/conf/domain_conf.h | 1 +
src/qemu/qemu_domain.c | 3 +++
3 files changed, 6 insertions(+)
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 153954a0b0..261fec888e 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -88,6 +88,7 @@ VIR_ENUM_IMPL(virDomainTaint,
"custom-ga-command",
"custom-hypervisor-feature",
"deprecated-config",
+ "custom-device",
);
VIR_ENUM_IMPL(virDomainTaintMessage,
@@ -105,6 +106,7 @@ VIR_ENUM_IMPL(virDomainTaintMessage,
N_("custom guest agent control commands issued"),
N_("hypervisor feature autodetection override"),
N_("use of deprecated configuration settings"),
+ N_("custom device configuration"),
);
VIR_ENUM_IMPL(virDomainVirt,
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index b69abfa270..b50923d499 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -3010,6 +3010,7 @@ typedef enum {
VIR_DOMAIN_TAINT_CUSTOM_GA_COMMAND, /* Custom guest agent command */
VIR_DOMAIN_TAINT_CUSTOM_HYPERVISOR_FEATURE, /* custom hypervisor feature control */
VIR_DOMAIN_TAINT_DEPRECATED_CONFIG, /* Configuration that is marked deprecated */
+ VIR_DOMAIN_TAINT_CUSTOM_DEVICE, /* hypervisor device config customized */
VIR_DOMAIN_TAINT_LAST
} virDomainTaintFlags;
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 636e58061e..200c05c0bb 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -6712,6 +6712,9 @@ void qemuDomainObjCheckTaint(virQEMUDriver *driver,
qemuDomainObjTaint(driver, obj, VIR_DOMAIN_TAINT_CUSTOM_ARGV, logCtxt);
if (qemuxmlns->capsadd || qemuxmlns->capsdel)
custom_hypervisor_feat = true;
+
+ if (qemuxmlns->ndeviceOverride > 0)
+ qemuDomainObjTaint(driver, obj, VIR_DOMAIN_TAINT_CUSTOM_DEVICE, logCtxt);
}
if (custom_hypervisor_feat ||
--
2.35.1
6:27 a.m.
New subject: [PATCH v2 4/6] qemuBuildDeviceCommandlineFromJSON: Pass 'virDomainDef' into the function
The definition object will be later used to access the qemu namespace
definition used to override device properties.
Signed-off-by: Peter Krempa <pkrempa(a)redhat.com>
---
src/qemu/qemu_command.c | 101 +++++++++++++++++++++-------------------
1 file changed, 53 insertions(+), 48 deletions(-)
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index c836799888..8af6179b5c 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -235,6 +235,7 @@ qemuBuildNetdevCommandlineFromJSON(virCommand *cmd,
static int
qemuBuildDeviceCommandlineFromJSON(virCommand *cmd,
virJSONValue *props,
+ const virDomainDef *def G_GNUC_UNUSED,
virQEMUCaps *qemuCaps)
{
g_autofree char *arg = NULL;
@@ -2327,6 +2328,7 @@ qemuBuildZPCIDevProps(virDomainDeviceInfo *dev)
static int
qemuCommandAddExtDevice(virCommand *cmd,
virDomainDeviceInfo *dev,
+ const virDomainDef *def,
virQEMUCaps *qemuCaps)
{
if (dev->type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI ||
@@ -2340,7 +2342,7 @@ qemuCommandAddExtDevice(virCommand *cmd,
if (!(devprops = qemuBuildZPCIDevProps(dev)))
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, devprops, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, devprops, def, qemuCaps) < 0)
return -1;
}
@@ -2383,6 +2385,7 @@ qemuBuildFloppyCommandLineControllerOptionsExplicit(virCommand
*cmd,
unsigned int bootindexB,
const char *backendA,
const char *backendB,
+ const virDomainDef *def,
virQEMUCaps *qemuCaps)
{
g_autoptr(virJSONValue) props = NULL;
@@ -2396,7 +2399,7 @@ qemuBuildFloppyCommandLineControllerOptionsExplicit(virCommand
*cmd,
NULL) < 0)
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, props, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, props, def, qemuCaps) < 0)
return -1;
return 0;
@@ -2447,6 +2450,7 @@ qemuBuildFloppyCommandLineControllerOptions(virCommand *cmd,
bootindexB,
backendA,
backendB,
+ def,
qemuCaps) < 0)
return -1;
} else {
@@ -2596,13 +2600,13 @@ qemuBuildDiskCommandLine(virCommand *cmd,
!virQEMUCapsGet(qemuCaps, QEMU_CAPS_BLOCKDEV))
return 0;
- if (qemuCommandAddExtDevice(cmd, &disk->info, qemuCaps) < 0)
+ if (qemuCommandAddExtDevice(cmd, &disk->info, def, qemuCaps) < 0)
return -1;
if (!(devprops = qemuBuildDiskDeviceProps(def, disk, qemuCaps)))
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, devprops, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, devprops, def, qemuCaps) < 0)
return -1;
return 0;
@@ -2690,13 +2694,13 @@ qemuBuildVHostUserFsCommandLine(virCommand *cmd,
if (qemuBuildChardevCommand(cmd, chrsrc, chardev_alias, priv->qemuCaps) < 0)
return -1;
- if (qemuCommandAddExtDevice(cmd, &fs->info, priv->qemuCaps) < 0)
+ if (qemuCommandAddExtDevice(cmd, &fs->info, def, priv->qemuCaps) < 0)
return -1;
if (!(devprops = qemuBuildVHostUserFsDevProps(fs, def, chardev_alias, priv)))
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, devprops, priv->qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, devprops, def, priv->qemuCaps) <
0)
return -1;
return 0;
@@ -2773,7 +2777,7 @@ qemuBuildFSDevCmd(virCommand *cmd,
if (qemuBuildDeviceAddressProps(devprops, def, &fs->info) < 0)
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, devprops, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, devprops, def, qemuCaps) < 0)
return -1;
return 0;
@@ -2793,7 +2797,7 @@ qemuBuildFSDevCommandLine(virCommand *cmd,
return -1;
virCommandAddArg(cmd, fsdevstr);
- if (qemuCommandAddExtDevice(cmd, &fs->info, qemuCaps) < 0)
+ if (qemuCommandAddExtDevice(cmd, &fs->info, def, qemuCaps) < 0)
return -1;
if (qemuBuildFSDevCmd(cmd, def, fs, qemuCaps) < 0)
@@ -3421,10 +3425,10 @@ qemuBuildControllersByTypeCommandLine(virCommand *cmd,
if (!props)
continue;
- if (qemuCommandAddExtDevice(cmd, &cont->info, qemuCaps) < 0)
+ if (qemuCommandAddExtDevice(cmd, &cont->info, def, qemuCaps) < 0)
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, props, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, props, def, qemuCaps) < 0)
return -1;
}
@@ -4382,13 +4386,13 @@ qemuBuildWatchdogCommandLine(virCommand *cmd,
if (!def->watchdog)
return 0;
- if (qemuCommandAddExtDevice(cmd, &def->watchdog->info, qemuCaps) < 0)
+ if (qemuCommandAddExtDevice(cmd, &def->watchdog->info, def, qemuCaps) <
0)
return -1;
if (!(props = qemuBuildWatchdogDevProps(def, watchdog)))
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, props, qemuCaps))
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, props, def, qemuCaps))
return -1;
/* qemu doesn't have a 'dump' action; we tell qemu to 'pause',
then
@@ -4434,10 +4438,10 @@ qemuBuildMemballoonCommandLine(virCommand *cmd,
if (qemuBuildDeviceAddressProps(props, def, &def->memballoon->info) <
0)
return -1;
- if (qemuCommandAddExtDevice(cmd, &def->memballoon->info, qemuCaps) < 0)
+ if (qemuCommandAddExtDevice(cmd, &def->memballoon->info, def, qemuCaps)
< 0)
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, props, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, props, def, qemuCaps) < 0)
return -1;
return 0;
@@ -4583,7 +4587,7 @@ qemuBuildInputCommandLine(virCommand *cmd,
for (i = 0; i < def->ninputs; i++) {
virDomainInputDef *input = def->inputs[i];
- if (qemuCommandAddExtDevice(cmd, &input->info, qemuCaps) < 0)
+ if (qemuCommandAddExtDevice(cmd, &input->info, def, qemuCaps) < 0)
return -1;
if (input->type == VIR_DOMAIN_INPUT_TYPE_EVDEV) {
@@ -4616,7 +4620,7 @@ qemuBuildInputCommandLine(virCommand *cmd,
}
if (props &&
- qemuBuildDeviceCommandlineFromJSON(cmd, props, qemuCaps) < 0)
+ qemuBuildDeviceCommandlineFromJSON(cmd, props, def, qemuCaps) < 0)
return -1;
}
}
@@ -4687,7 +4691,7 @@ qemuBuildSoundDevCmd(virCommand *cmd,
if (qemuBuildDeviceAddressProps(props, def, &sound->info) < 0)
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, props, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, props, def, qemuCaps) < 0)
return -1;
return 0;
@@ -4720,7 +4724,7 @@ qemuBuildSoundCodecCmd(virCommand *cmd,
NULL) < 0)
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, props, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, props, def, qemuCaps) < 0)
return -1;
return 0;
@@ -4743,7 +4747,7 @@ qemuBuildSoundCommandLine(virCommand *cmd,
if (sound->model == VIR_DOMAIN_SOUND_MODEL_PCSPK) {
virCommandAddArgList(cmd, "-soundhw", "pcspk", NULL);
} else {
- if (qemuCommandAddExtDevice(cmd, &sound->info, qemuCaps) < 0)
+ if (qemuCommandAddExtDevice(cmd, &sound->info, def, qemuCaps) < 0)
return -1;
if (qemuBuildSoundDevCmd(cmd, def, sound, qemuCaps) < 0)
@@ -4867,7 +4871,7 @@ qemuBuildDeviceVideoCmd(virCommand *cmd,
if (qemuBuildDeviceAddressProps(props, def, &video->info) < 0)
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, props, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, props, def, qemuCaps) < 0)
return -1;
return 0;
@@ -4905,7 +4909,7 @@ qemuBuildVideoCommandLine(virCommand *cmd,
return -1;
}
- if (qemuCommandAddExtDevice(cmd, &def->videos[i]->info,
priv->qemuCaps) < 0)
+ if (qemuCommandAddExtDevice(cmd, &def->videos[i]->info, def,
priv->qemuCaps) < 0)
return -1;
if (qemuBuildDeviceVideoCmd(cmd, def, video, priv->qemuCaps) < 0)
@@ -5035,7 +5039,7 @@ qemuBuildHubDevCmd(virCommand *cmd,
if (qemuBuildDeviceAddressProps(props, def, &dev->info) < 0)
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, props, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, props, def, qemuCaps) < 0)
return -1;
return 0;
@@ -5360,7 +5364,7 @@ qemuBuildHostdevSCSICommandLine(virCommand *cmd,
if (!(devprops = qemuBuildSCSIHostdevDevProps(def, hostdev, backendAlias)))
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, devprops, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, devprops, def, qemuCaps) < 0)
return -1;
return 0;
@@ -5391,7 +5395,7 @@ qemuBuildHostdevCommandLine(virCommand *cmd,
if (!(devprops = qemuBuildUSBHostdevDevProps(def, hostdev, qemuCaps)))
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, devprops, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, devprops, def, qemuCaps) < 0)
return -1;
break;
@@ -5401,13 +5405,13 @@ qemuBuildHostdevCommandLine(virCommand *cmd,
if (hostdev->info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_UNASSIGNED)
continue;
- if (qemuCommandAddExtDevice(cmd, hostdev->info, qemuCaps) < 0)
+ if (qemuCommandAddExtDevice(cmd, hostdev->info, def, qemuCaps) < 0)
return -1;
if (!(devprops = qemuBuildPCIHostdevDevProps(def, hostdev)))
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, devprops, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, devprops, def, qemuCaps) < 0)
return -1;
break;
@@ -5436,7 +5440,7 @@ qemuBuildHostdevCommandLine(virCommand *cmd,
vhostfdName)))
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, devprops, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, devprops, def, qemuCaps) <
0)
return -1;
}
@@ -5459,7 +5463,7 @@ qemuBuildHostdevCommandLine(virCommand *cmd,
if (!(devprops = qemuBuildHostdevMediatedDevProps(def, hostdev)))
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, devprops, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, devprops, def, qemuCaps) < 0)
return -1;
break;
@@ -5732,13 +5736,13 @@ qemuBuildRNGCommandLine(virCommand *cmd,
return -1;
/* add the device */
- if (qemuCommandAddExtDevice(cmd, &rng->info, qemuCaps) < 0)
+ if (qemuCommandAddExtDevice(cmd, &rng->info, def, qemuCaps) < 0)
return -1;
if (!(devprops = qemuBuildRNGDevProps(def, rng, qemuCaps)))
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, devprops, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, devprops, def, qemuCaps) < 0)
return -1;
}
@@ -6078,7 +6082,7 @@ qemuBuildVMGenIDCommandLine(virCommand *cmd,
NULL) < 0)
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, props, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, props, def, qemuCaps) < 0)
return -1;
return 0;
@@ -6404,7 +6408,7 @@ qemuBuildIOMMUCommandLine(virCommand *cmd,
NULL) < 0)
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, props, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, props, def, qemuCaps) < 0)
return -1;
return 0;
@@ -7730,7 +7734,7 @@ qemuBuildMemoryDeviceCommandLine(virCommand *cmd,
if (!(props = qemuBuildMemoryDeviceProps(cfg, priv, def, def->mems[i])))
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, props, priv->qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, props, def, priv->qemuCaps) <
0)
return -1;
}
@@ -8884,15 +8888,15 @@ qemuBuildInterfaceCommandLine(virQEMUDriver *driver,
* New way: -netdev type=tap,id=netdev1 -device e1000,id=netdev1
*/
if (qemuDomainSupportsNicdev(def, net)) {
- if (qemuCommandAddExtDevice(cmd, &net->info, qemuCaps) < 0)
+ if (qemuCommandAddExtDevice(cmd, &net->info, def, qemuCaps) < 0)
goto cleanup;
if (!(nicprops = qemuBuildNicDevProps(def, net, net->driver.virtio.queues,
qemuCaps)))
goto cleanup;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, nicprops, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, nicprops, def, qemuCaps) < 0)
goto cleanup;
} else if (!requireNicdev) {
- if (qemuCommandAddExtDevice(cmd, &net->info, qemuCaps) < 0)
+ if (qemuCommandAddExtDevice(cmd, &net->info, def, qemuCaps) < 0)
goto cleanup;
if (!(nic = qemuBuildLegacyNicStr(net)))
@@ -9055,7 +9059,7 @@ qemuBuildSmartcardCommandLine(virCommand *cmd,
NULL) < 0)
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, props, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, props, def, qemuCaps) < 0)
return -1;
return 0;
@@ -9225,10 +9229,10 @@ qemuBuildShmemCommandLine(virCommand *cmd,
if (!devProps)
return -1;
- if (qemuCommandAddExtDevice(cmd, &shmem->info, qemuCaps) < 0)
+ if (qemuCommandAddExtDevice(cmd, &shmem->info, def, qemuCaps) < 0)
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, devProps, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, devProps, def, qemuCaps) < 0)
return -1;
if (shmem->server.enabled) {
@@ -9285,7 +9289,7 @@ qemuBuildChrDeviceCommandLine(virCommand *cmd,
if (!(props = qemuBuildChrDeviceProps(def, chr, qemuCaps)))
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, props, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, props, def, qemuCaps) < 0)
return -1;
return 0;
@@ -9569,7 +9573,7 @@ qemuBuildRedirdevCommandLine(virCommand *cmd,
if (!(devprops = qemuBuildRedirdevDevProps(def, redirdev)))
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, devprops, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, devprops, def, qemuCaps) < 0)
return -1;
}
@@ -9671,7 +9675,7 @@ qemuBuildTPMDevCmd(virCommand *cmd,
if (qemuBuildDeviceAddressProps(props, def, &tpm->info) < 0)
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, props, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, props, def, qemuCaps) < 0)
return -1;
return 0;
@@ -9792,6 +9796,7 @@ qemuBuildTPMCommandLine(virCommand *cmd,
static int
qemuBuildTPMProxyCommandLine(virCommand *cmd,
virDomainTPMDef *tpm,
+ const virDomainDef *def,
virQEMUCaps *qemuCaps)
{
g_autoptr(virJSONValue) props = NULL;
@@ -9803,7 +9808,7 @@ qemuBuildTPMProxyCommandLine(virCommand *cmd,
NULL) < 0)
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, props, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, props, def, qemuCaps) < 0)
return -1;
return 0;
@@ -9819,7 +9824,7 @@ qemuBuildTPMsCommandLine(virCommand *cmd,
for (i = 0; i < def->ntpms; i++) {
if (def->tpms[i]->model == VIR_DOMAIN_TPM_MODEL_SPAPR_PROXY) {
- if (qemuBuildTPMProxyCommandLine(cmd, def->tpms[i], priv->qemuCaps)
< 0)
+ if (qemuBuildTPMProxyCommandLine(cmd, def->tpms[i], def,
priv->qemuCaps) < 0)
return -1;
} else if (qemuBuildTPMCommandLine(cmd, def, def->tpms[i], priv) < 0) {
return -1;
@@ -9921,7 +9926,7 @@ qemuBuildVMCoreInfoCommandLine(virCommand *cmd,
NULL) < 0)
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, props, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, props, def, qemuCaps) < 0)
return -1;
return 0;
@@ -9954,7 +9959,7 @@ qemuBuildPanicCommandLine(virCommand *cmd,
return -1;
}
- if (qemuBuildDeviceCommandlineFromJSON(cmd, props, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, props, def, qemuCaps) < 0)
return -1;
break;
@@ -10283,10 +10288,10 @@ qemuBuildVsockCommandLine(virCommand *cmd,
virCommandPassFD(cmd, priv->vhostfd, VIR_COMMAND_PASS_FD_CLOSE_PARENT);
priv->vhostfd = -1;
- if (qemuCommandAddExtDevice(cmd, &vsock->info, qemuCaps) < 0)
+ if (qemuCommandAddExtDevice(cmd, &vsock->info, def, qemuCaps) < 0)
return -1;
- if (qemuBuildDeviceCommandlineFromJSON(cmd, devprops, qemuCaps) < 0)
+ if (qemuBuildDeviceCommandlineFromJSON(cmd, devprops, def, qemuCaps) < 0)
return -1;
return 0;
--
2.35.1
6:27 a.m.
New subject: [PATCH v2 5/6] qemu: command: Override device definition according to the namespace config
Apply the user-requested changes to the device definition as requested
by the <qemu:deviceOverride> element from the custom qemu XML namespace.
Closes: https://gitlab.com/libvirt/libvirt/-/issues/287
Signed-off-by: Peter Krempa <pkrempa(a)redhat.com>
---
src/qemu/qemu_command.c | 34 ++++++++++++++++++-
.../qemu-ns.x86_64-4.0.0.args | 2 +-
.../qemu-ns.x86_64-latest.args | 2 +-
3 files changed, 35 insertions(+), 3 deletions(-)
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 8af6179b5c..fd5fe410d1 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -232,14 +232,46 @@ qemuBuildNetdevCommandlineFromJSON(virCommand *cmd,
}
+static void
+qemuBuildDeviceCommandlineHandleOverrides(virJSONValue *props,
+ qemuDomainXmlNsDef *nsdef)
+{
+ const char *alias = virJSONValueObjectGetString(props, "id");
+ size_t i;
+
+ for (i = 0; i < nsdef->ndeviceOverride; i++) {
+ qemuDomainXmlNsDeviceOverride *dev = nsdef->deviceOverride + i;
+ size_t j;
+
+ if (STRNEQ(alias, dev->alias))
+ continue;
+
+ for (j = 0; j < dev->nfrontend; j++) {
+ qemuDomainXmlNsOverrideProperty *prop = dev->frontend + j;
+
+ virJSONValueObjectRemoveKey(props, prop->name, NULL);
+ if (prop->json) {
+ g_autoptr(virJSONValue) copy = virJSONValueCopy(prop->json);
+
+ virJSONValueObjectAppend(props, prop->name, ©);
+ }
+ }
+ }
+}
+
+
static int
qemuBuildDeviceCommandlineFromJSON(virCommand *cmd,
virJSONValue *props,
- const virDomainDef *def G_GNUC_UNUSED,
+ const virDomainDef *def,
virQEMUCaps *qemuCaps)
{
+ qemuDomainXmlNsDef *nsdef = def->namespaceData;
g_autofree char *arg = NULL;
+ if (nsdef && nsdef->ndeviceOverride > 0)
+ qemuBuildDeviceCommandlineHandleOverrides(props, nsdef);
+
if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_JSON)) {
if (!(arg = virJSONValueToString(props, false)))
return -1;
diff --git a/tests/qemuxml2argvdata/qemu-ns.x86_64-4.0.0.args
b/tests/qemuxml2argvdata/qemu-ns.x86_64-4.0.0.args
index 236f984a90..284f32d6a1 100644
--- a/tests/qemuxml2argvdata/qemu-ns.x86_64-4.0.0.args
+++ b/tests/qemuxml2argvdata/qemu-ns.x86_64-4.0.0.args
@@ -31,7 +31,7 @@ BAR='' \
-device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 \
-blockdev
'{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest1","node-name":"libvirt-1-storage","auto-read-only":true,"discard":"unmap"}'
\
-blockdev
'{"node-name":"libvirt-1-format","read-only":false,"driver":"raw","file":"libvirt-1-storage"}'
\
--device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ua-disk,bootindex=1 \
+-device
ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ua-disk,bootindex=1,prop1=propval1,prop2=-321,prop3=123,prop4=on,prop5=off
\
-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x2 \
-unknown parameter \
-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
diff --git a/tests/qemuxml2argvdata/qemu-ns.x86_64-latest.args
b/tests/qemuxml2argvdata/qemu-ns.x86_64-latest.args
index c0bf45000f..c1949264f8 100644
--- a/tests/qemuxml2argvdata/qemu-ns.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/qemu-ns.x86_64-latest.args
@@ -33,7 +33,7 @@ BAR='' \
-device
'{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}'
\
-blockdev
'{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest1","node-name":"libvirt-1-storage","auto-read-only":true,"discard":"unmap"}'
\
-blockdev
'{"node-name":"libvirt-1-format","read-only":false,"driver":"raw","file":"libvirt-1-storage"}'
\
--device
'{"driver":"ide-hd","bus":"ide.0","unit":0,"drive":"libvirt-1-format","id":"ua-disk","bootindex":1}'
\
+-device
'{"driver":"ide-hd","bus":"ide.0","unit":0,"drive":"libvirt-1-format","id":"ua-disk","bootindex":1,"prop1":"propval1","prop2":-321,"prop3":123,"prop4":true,"prop5":false}'
\
-audiodev
'{"id":"audio1","driver":"none"}' \
-device
'{"driver":"virtio-balloon-pci","id":"balloon0","bus":"pci.0","addr":"0x2"}'
\
-unknown parameter \
--
2.35.1
6:27 a.m.
New subject: [PATCH v2 6/6] NEWS: Mention the qemu device property override feature
Signed-off-by: Peter Krempa <pkrempa(a)redhat.com>
---
NEWS.rst | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/NEWS.rst b/NEWS.rst
index b9b9807625..754687ac4d 100644
--- a/NEWS.rst
+++ b/NEWS.rst
@@ -25,6 +25,13 @@ v8.2.0 (unreleased)
migration allowing migration to proceed even when the user expects certificate
name not to match.
+ * qemu: Allow overrides of device properties via the qemu namespace
+
+ Users wishing to override or modify properties of devices configured by
+ libvirt can use the ``<qemu:deviceOverride>`` QEMU namespace element to
+ specify the overrides instead of relying on the argv passthrough of the
+ ``-set`` qemu commandline option which no longer works with new qemu.
+
* **Bug fixes**
* Both build and tests should now pass on Alpine Linux or any other
--
2.35.1
8:52 a.m.
On Tue, Mar 22, 2022 at 12:27:19 +0100, Peter Krempa wrote:
v2:
- patch 1/7 from last time was pushed
- XML changes:
- top level element renamed to "qemu:override" to accomodate
possible extension in the future
- wrapped 'qemu:props' meant to override the frontend under a
'qemu:frontend' element
- code changes:
- renamed few bits (dropped 'Device') from code that can theoretically be
reused
- split out some functions for enhanced extensibility in the future
Peter Krempa (6):
docs: drvqemu: Document overriding of device properties
qemu: domain: Add XML namespace code for overriding device config
conf: Introduce VIR_DOMAIN_TAINT_CUSTOM_DEVICE and use it in qemu
qemuBuildDeviceCommandlineFromJSON: Pass 'virDomainDef' into the
function
qemu: command: Override device definition according to the namespace
config
NEWS: Mention the qemu device property override feature
A bit of an early ping ... it would be great to have this for the
upcoming release.
5:44 a.m.
On 3/22/22 12:27, Peter Krempa wrote:
v2:
- patch 1/7 from last time was pushed
- XML changes:
- top level element renamed to "qemu:override" to accomodate
possible extension in the future
- wrapped 'qemu:props' meant to override the frontend under a
'qemu:frontend' element
- code changes:
- renamed few bits (dropped 'Device') from code that can theoretically be
reused
- split out some functions for enhanced extensibility in the future
Peter Krempa (6):
docs: drvqemu: Document overriding of device properties
qemu: domain: Add XML namespace code for overriding device config
conf: Introduce VIR_DOMAIN_TAINT_CUSTOM_DEVICE and use it in qemu
qemuBuildDeviceCommandlineFromJSON: Pass 'virDomainDef' into the
function
qemu: command: Override device definition according to the namespace
config
NEWS: Mention the qemu device property override feature
NEWS.rst | 7 +
docs/drvqemu.rst | 57 +++++
src/conf/domain_conf.c | 2 +
src/conf/domain_conf.h | 1 +
src/conf/schemas/domaincommon.rng | 42 ++++
src/qemu/qemu_command.c | 133 +++++++----
src/qemu/qemu_domain.c | 221 ++++++++++++++++++
src/qemu/qemu_domain.h | 33 +++
.../qemu-ns.x86_64-4.0.0.args | 2 +-
.../qemu-ns.x86_64-latest.args | 2 +-
tests/qemuxml2argvdata/qemu-ns.xml | 14 ++
.../qemu-ns.x86_64-latest.xml | 14 ++
12 files changed, 478 insertions(+), 50 deletions(-)
Reviewed-by: Michal Privoznik <mprivozn(a)redhat.com>
Michal
970
days inactive
976
days old
8 comments
2 participants
participants (2)
-
Michal Prívozník -
Peter Krempa