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3372f8fb5b
This patch reworks the Hyper-V driver structs and the code generator
to provide seamless support for both Hyper-V 2008 and 2012 or newer.
This does not implement any new libvirt APIs, it just adapts existing
2008-only driver to also handle 2012 and newer by sharing as much
driver code as possible (currently it's all of it :-)). This is needed
to set the foundation before we can move forward with implementing the
rest of the driver APIs.
With the 2012 release, Microsoft introduced "v2" version of Msvm_* WMI
classes. Those are largely the same as "v1" (used in 2008) but have some
new properties as well as need different wsman request URIs. To
accomodate those differences, most of work went into the code generator
so that it's "aware" of possibility of multiple versions of the same WMI
class and produce C code accordingly.
To accomplish this the following changes were made:
* the abstract hypervObject struct's data member was changed to a union
that has "common", "v1" and "v2" members. Those are structs that
represent WMI classes that we get back from wsman response. The
"common" struct has members that are present in both "v1" and "v2"
which the driver API callbacks can use to read the data from in
version-independent manner (if version-specific member needs to be
accessed the driver can check priv->wmiVersion and read from "v1" or
"v2" as needed). Those structs are guaranteed to be memory aligned
by the code generator (see the align_property_members implementation
that takes care of that)
* the generator produces *_WmiInfo for each WMI class "family" that
holds an array of hypervWmiClassInfoPtr each providing information
as to which request URI to use for each "version" of given WMI class
as well as XmlSerializerInfo struct needed to unserilize WS-MAN
responsed into the data structs. The driver uses those to make proper
WS-MAN request depending on which version it's connected to.
* the generator no longer produces "helper" functions such as
hypervGetMsvmComputerSystemList as those were originally just simple
wrappers around hypervEnumAndPull, instead those were hand-written
now (to keep driver changes minimal). The reason is that we'll have
more code coming implementing missing libvirt APIs and surely code
patterns will emerge that would warrant more useful "utility" functions
like that.
* a hypervInitConnection was added to the driver which "detects"
Hyper-V version by testing simple wsman request using v2 then falling
back to v1, obviously if both fail, the we're erroring out.
To express how the above translates in code:
void
hypervImplementSomeLibvirtApi(virConnectPtr conn, ...)
{
hypervPrivate *priv = conn->privateData;
virBuffer query = VIR_BUFFER_INITIALIZER;
hypervWqlQuery wqlQuery = HYPERV_WQL_QUERY_INITIALIZER;
Msvm_ComputerSystem *list = NULL; /* typed hypervObject instance */
/* the WmiInfo struct has the data needed for wsman request and
* response handling for both v1 and v2 */
wqlQuery.info = Msvm_ComputerSystem_WmiInfo;
wqlQuery.query = &query;
virBufferAddLit(&query, "select * from Msvm_ComputerSystem");
if (hypervEnumAndPull(priv, &wqlQuery, (hypervObject **) &list) < 0) {
goto cleanup;
}
if (list == NULL) {
/* none found */
goto cleanup;
}
/* works with v1 and v2 */
char *vmName = list->data.common->Name;
/* access property that is in v2 only */
if (priv->wmiVersion == HYPERV_WMI_VERSION_V2)
char *foo = list->data.v2->V2Property;
else
char *foo = list->data.v1->V1Property;
cleanup:
hypervFreeObject(priv, (hypervObject *)list);
}
125 lines
4.4 KiB
C
125 lines
4.4 KiB
C
/*
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* hyperv_wmi_classes.h: WMI classes for managing Microsoft Hyper-V hosts
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*
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* Copyright (C) 2011 Matthias Bolte <matthias.bolte@googlemail.com>
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* Copyright (C) 2009 Michael Sievers <msievers83@googlemail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef __HYPERV_WMI_CLASSES_H__
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# define __HYPERV_WMI_CLASSES_H__
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# include "openwsman.h"
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# include "hyperv_wmi_classes.generated.typedef"
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# define ROOT_CIMV2 \
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"http://schemas.microsoft.com/wbem/wsman/1/wmi/root/cimv2/*"
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# define ROOT_VIRTUALIZATION \
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"http://schemas.microsoft.com/wbem/wsman/1/wmi/root/virtualization/*"
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# define ROOT_VIRTUALIZATION_V2 \
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"http://schemas.microsoft.com/wbem/wsman/1/wmi/root/virtualization/v2/*"
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Msvm_ComputerSystem
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*/
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# define MSVM_COMPUTERSYSTEM_WQL_VIRTUAL \
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"Description = \"Microsoft Virtual Machine\" "
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# define MSVM_COMPUTERSYSTEM_WQL_PHYSICAL \
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"Description = \"Microsoft Hosting Computer System\" "
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# define MSVM_COMPUTERSYSTEM_WQL_ACTIVE \
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"(EnabledState != 0 and EnabledState != 3 and EnabledState != 32769) "
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# define MSVM_COMPUTERSYSTEM_WQL_INACTIVE \
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"(EnabledState = 0 or EnabledState = 3 or EnabledState = 32769) "
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enum _Msvm_ComputerSystem_EnabledState {
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MSVM_COMPUTERSYSTEM_ENABLEDSTATE_UNKNOWN = 0, /* inactive */
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MSVM_COMPUTERSYSTEM_ENABLEDSTATE_ENABLED = 2, /* active */
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MSVM_COMPUTERSYSTEM_ENABLEDSTATE_DISABLED = 3, /* inactive */
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MSVM_COMPUTERSYSTEM_ENABLEDSTATE_PAUSED = 32768, /* active */
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MSVM_COMPUTERSYSTEM_ENABLEDSTATE_SUSPENDED = 32769, /* inactive */
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MSVM_COMPUTERSYSTEM_ENABLEDSTATE_STARTING = 32770, /* active */
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MSVM_COMPUTERSYSTEM_ENABLEDSTATE_SNAPSHOTTING = 32771, /* active */
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MSVM_COMPUTERSYSTEM_ENABLEDSTATE_SAVING = 32773, /* active */
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MSVM_COMPUTERSYSTEM_ENABLEDSTATE_STOPPING = 32774, /* active */
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MSVM_COMPUTERSYSTEM_ENABLEDSTATE_PAUSING = 32776, /* active */
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MSVM_COMPUTERSYSTEM_ENABLEDSTATE_RESUMING = 32777 /* active */
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};
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enum _Msvm_ComputerSystem_RequestedState {
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MSVM_COMPUTERSYSTEM_REQUESTEDSTATE_ENABLED = 2,
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MSVM_COMPUTERSYSTEM_REQUESTEDSTATE_DISABLED = 3,
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MSVM_COMPUTERSYSTEM_REQUESTEDSTATE_REBOOT = 10,
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MSVM_COMPUTERSYSTEM_REQUESTEDSTATE_PAUSED = 32768,
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MSVM_COMPUTERSYSTEM_REQUESTEDSTATE_SUSPENDED = 32769,
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};
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Msvm_ConcreteJob
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*/
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enum _Msvm_ConcreteJob_JobState {
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MSVM_CONCRETEJOB_JOBSTATE_NEW = 2,
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MSVM_CONCRETEJOB_JOBSTATE_STARTING = 3,
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MSVM_CONCRETEJOB_JOBSTATE_RUNNING = 4,
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MSVM_CONCRETEJOB_JOBSTATE_SUSPENDED = 5,
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MSVM_CONCRETEJOB_JOBSTATE_SHUTTING_DOWN = 6,
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MSVM_CONCRETEJOB_JOBSTATE_COMPLETED = 7,
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MSVM_CONCRETEJOB_JOBSTATE_TERMINATED = 8,
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MSVM_CONCRETEJOB_JOBSTATE_KILLED = 9,
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MSVM_CONCRETEJOB_JOBSTATE_EXCEPTION = 10,
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MSVM_CONCRETEJOB_JOBSTATE_SERVICE = 11,
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};
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typedef struct _hypervWmiClassInfo hypervWmiClassInfo;
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typedef hypervWmiClassInfo *hypervWmiClassInfoPtr;
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struct _hypervWmiClassInfo {
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/* The WMI class name */
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const char *name;
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/* The version of the WMI class as in "v1" or "v2" */
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const char *version;
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/* The URI for wsman enumerate request */
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const char *rootUri;
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/* The namespace URI for XML serialization */
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const char *resourceUri;
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/* The wsman serializer info - one of the *_TypeInfo structs */
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XmlSerializerInfo *serializerInfo;
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};
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typedef struct _hypervWmiClassInfoList hypervWmiClassInfoList;
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typedef hypervWmiClassInfoList *hypervWmiClassInfoListPtr;
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struct _hypervWmiClassInfoList {
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size_t count;
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hypervWmiClassInfoPtr *objs;
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};
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# include "hyperv_wmi_classes.generated.h"
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#endif /* __HYPERV_WMI_CLASSES_H__ */
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