Module libvirt from libvirt
Provides the interfaces of the libvirt library to handle virtualized domains
Table of Contents
#define LIBVIR_VERSION_NUMBER
#define VIR_COPY_CPUMAP
#define VIR_CPU_MAPLEN
#define VIR_CPU_USABLE
#define VIR_DOMAIN_SCHED_FIELD_LENGTH
#define VIR_GET_CPUMAP
#define VIR_NODEINFO_MAXCPUS
#define VIR_UNUSE_CPU
#define VIR_USE_CPU
#define VIR_UUID_BUFLEN
#define VIR_UUID_STRING_BUFLEN
typedef struct _virConnect virConnect
typedef struct _virConnectAuth virConnectAuth
typedef virConnectAuth * virConnectAuthPtr
typedef struct _virConnectCredential virConnectCredential
typedef virConnectCredential * virConnectCredentialPtr
typedef enum virConnectCredentialType
typedef enum virConnectFlags
typedef virConnect * virConnectPtr
typedef struct _virDomain virDomain
typedef virDomainBlockStatsStruct * virDomainBlockStatsPtr
typedef struct _virDomainBlockStats virDomainBlockStatsStruct
typedef enum virDomainCreateFlags
typedef enum virDomainEventDefinedDetailType
typedef enum virDomainEventResumedDetailType
typedef enum virDomainEventStartedDetailType
typedef enum virDomainEventStoppedDetailType
typedef enum virDomainEventSuspendedDetailType
typedef enum virDomainEventType
typedef enum virDomainEventUndefinedDetailType
typedef struct _virDomainInfo virDomainInfo
typedef virDomainInfo * virDomainInfoPtr
typedef virDomainInterfaceStatsStruct * virDomainInterfaceStatsPtr
typedef struct _virDomainInterfaceStats virDomainInterfaceStatsStruct
typedef enum virDomainMemoryFlags
typedef enum virDomainMigrateFlags
typedef virDomain * virDomainPtr
typedef enum virDomainState
typedef enum virDomainXMLFlags
typedef enum virEventHandleType
typedef struct _virNetwork virNetwork
typedef virNetwork * virNetworkPtr
typedef struct _virNodeDevice virNodeDevice
typedef virNodeDevice * virNodeDevicePtr
typedef struct _virNodeInfo virNodeInfo
typedef virNodeInfo * virNodeInfoPtr
typedef struct _virSchedParameter virSchedParameter
typedef virSchedParameter * virSchedParameterPtr
typedef enum virSchedParameterType
typedef struct _virStoragePool virStoragePool
typedef enum virStoragePoolBuildFlags
typedef enum virStoragePoolDeleteFlags
typedef struct _virStoragePoolInfo virStoragePoolInfo
typedef virStoragePoolInfo * virStoragePoolInfoPtr
typedef virStoragePool * virStoragePoolPtr
typedef enum virStoragePoolState
typedef struct _virStorageVol virStorageVol
typedef enum virStorageVolDeleteFlags
typedef struct _virStorageVolInfo virStorageVolInfo
typedef virStorageVolInfo * virStorageVolInfoPtr
typedef virStorageVol * virStorageVolPtr
typedef enum virStorageVolType
typedef struct _virVcpuInfo virVcpuInfo
typedef virVcpuInfo * virVcpuInfoPtr
typedef enum virVcpuState
typedef virConnectAuthCallbackPtr
int virConnectAuthCallbackPtr (virConnectCredentialPtr cred,
unsigned int ncred,
void * cbdata)
int virConnectClose (virConnectPtr conn)
typedef virConnectDomainEventCallback
int virConnectDomainEventCallback (virConnectPtr conn,
virDomainPtr dom,
int event,
int detail,
void * opaque)
int virConnectDomainEventDeregister (virConnectPtr conn,
virConnectDomainEventCallback cb)
int virConnectDomainEventRegister (virConnectPtr conn,
virConnectDomainEventCallback cb,
void * opaque,
virFreeCallback freecb)
char * virConnectFindStoragePoolSources (virConnectPtr conn,
const char * type,
const char * srcSpec,
unsigned int flags)
char * virConnectGetCapabilities (virConnectPtr conn)
char * virConnectGetHostname (virConnectPtr conn)
int virConnectGetMaxVcpus (virConnectPtr conn,
const char * type)
const char * virConnectGetType (virConnectPtr conn)
char * virConnectGetURI (virConnectPtr conn)
int virConnectGetVersion (virConnectPtr conn,
unsigned long * hvVer)
int virConnectListDefinedDomains (virConnectPtr conn,
char ** const names,
int maxnames)
int virConnectListDefinedNetworks (virConnectPtr conn,
char ** const names,
int maxnames)
int virConnectListDefinedStoragePools (virConnectPtr conn,
char ** const names,
int maxnames)
int virConnectListDomains (virConnectPtr conn,
int * ids,
int maxids)
int virConnectListNetworks (virConnectPtr conn,
char ** const names,
int maxnames)
int virConnectListStoragePools (virConnectPtr conn,
char ** const names,
int maxnames)
int virConnectNumOfDefinedDomains (virConnectPtr conn)
int virConnectNumOfDefinedNetworks (virConnectPtr conn)
int virConnectNumOfDefinedStoragePools (virConnectPtr conn)
int virConnectNumOfDomains (virConnectPtr conn)
int virConnectNumOfNetworks (virConnectPtr conn)
int virConnectNumOfStoragePools (virConnectPtr conn)
virConnectPtr virConnectOpen (const char * name)
virConnectPtr virConnectOpenAuth (const char * name,
virConnectAuthPtr auth,
int flags)
virConnectPtr virConnectOpenReadOnly (const char * name)
int virConnectRef (virConnectPtr conn)
int virDomainAttachDevice (virDomainPtr domain,
const char * xml)
int virDomainBlockPeek (virDomainPtr dom,
const char * path,
unsigned long long offset,
size_t size,
void * buffer,
unsigned int flags)
int virDomainBlockStats (virDomainPtr dom,
const char * path,
virDomainBlockStatsPtr stats,
size_t size)
int virDomainCoreDump (virDomainPtr domain,
const char * to,
int flags)
int virDomainCreate (virDomainPtr domain)
virDomainPtr virDomainCreateLinux (virConnectPtr conn,
const char * xmlDesc,
unsigned int flags)
virDomainPtr virDomainCreateXML (virConnectPtr conn,
const char * xmlDesc,
unsigned int flags)
virDomainPtr virDomainDefineXML (virConnectPtr conn,
const char * xml)
int virDomainDestroy (virDomainPtr domain)
int virDomainDetachDevice (virDomainPtr domain,
const char * xml)
int virDomainFree (virDomainPtr domain)
int virDomainGetAutostart (virDomainPtr domain,
int * autostart)
virConnectPtr virDomainGetConnect (virDomainPtr dom)
unsigned int virDomainGetID (virDomainPtr domain)
int virDomainGetInfo (virDomainPtr domain,
virDomainInfoPtr info)
unsigned long virDomainGetMaxMemory (virDomainPtr domain)
int virDomainGetMaxVcpus (virDomainPtr domain)
const char * virDomainGetName (virDomainPtr domain)
char * virDomainGetOSType (virDomainPtr domain)
int virDomainGetSchedulerParameters (virDomainPtr domain,
virSchedParameterPtr params,
int * nparams)
char * virDomainGetSchedulerType (virDomainPtr domain,
int * nparams)
int virDomainGetUUID (virDomainPtr domain,
unsigned char * uuid)
int virDomainGetUUIDString (virDomainPtr domain,
char * buf)
int virDomainGetVcpus (virDomainPtr domain,
virVcpuInfoPtr info,
int maxinfo,
unsigned char * cpumaps,
int maplen)
char * virDomainGetXMLDesc (virDomainPtr domain,
int flags)
int virDomainInterfaceStats (virDomainPtr dom,
const char * path,
virDomainInterfaceStatsPtr stats,
size_t size)
virDomainPtr virDomainLookupByID (virConnectPtr conn,
int id)
virDomainPtr virDomainLookupByName (virConnectPtr conn,
const char * name)
virDomainPtr virDomainLookupByUUID (virConnectPtr conn,
const unsigned char * uuid)
virDomainPtr virDomainLookupByUUIDString (virConnectPtr conn,
const char * uuidstr)
int virDomainMemoryPeek (virDomainPtr dom,
unsigned long long start,
size_t size,
void * buffer,
unsigned int flags)
virDomainPtr virDomainMigrate (virDomainPtr domain,
virConnectPtr dconn,
unsigned long flags,
const char * dname,
const char * uri,
unsigned long bandwidth)
int virDomainPinVcpu (virDomainPtr domain,
unsigned int vcpu,
unsigned char * cpumap,
int maplen)
int virDomainReboot (virDomainPtr domain,
unsigned int flags)
int virDomainRef (virDomainPtr domain)
int virDomainRestore (virConnectPtr conn,
const char * from)
int virDomainResume (virDomainPtr domain)
int virDomainSave (virDomainPtr domain,
const char * to)
int virDomainSetAutostart (virDomainPtr domain,
int autostart)
int virDomainSetMaxMemory (virDomainPtr domain,
unsigned long memory)
int virDomainSetMemory (virDomainPtr domain,
unsigned long memory)
int virDomainSetSchedulerParameters (virDomainPtr domain,
virSchedParameterPtr params,
int nparams)
int virDomainSetVcpus (virDomainPtr domain,
unsigned int nvcpus)
int virDomainShutdown (virDomainPtr domain)
int virDomainSuspend (virDomainPtr domain)
int virDomainUndefine (virDomainPtr domain)
typedef virEventAddHandleFunc
int virEventAddHandleFunc (int fd,
int event,
virEventHandleCallback cb,
void * opaque,
virFreeCallback ff)
typedef virEventAddTimeoutFunc
int virEventAddTimeoutFunc (int timeout,
virEventTimeoutCallback cb,
void * opaque,
virFreeCallback ff)
typedef virEventHandleCallback
void virEventHandleCallback (int watch,
int fd,
int events,
void * opaque)
void virEventRegisterImpl (virEventAddHandleFunc addHandle,
virEventUpdateHandleFunc updateHandle,
virEventRemoveHandleFunc removeHandle,
virEventAddTimeoutFunc addTimeout,
virEventUpdateTimeoutFunc updateTimeout,
virEventRemoveTimeoutFunc removeTimeout)
typedef virEventRemoveHandleFunc
int virEventRemoveHandleFunc (int watch)
typedef virEventRemoveTimeoutFunc
int virEventRemoveTimeoutFunc (int timer)
typedef virEventTimeoutCallback
void virEventTimeoutCallback (int timer,
void * opaque)
typedef virEventUpdateHandleFunc
void virEventUpdateHandleFunc (int watch,
int event)
typedef virEventUpdateTimeoutFunc
void virEventUpdateTimeoutFunc (int timer,
int timeout)
typedef virFreeCallback
void virFreeCallback (void * opaque)
int virGetVersion (unsigned long * libVer,
const char * type,
unsigned long * typeVer)
int virInitialize (void)
int virNetworkCreate (virNetworkPtr network)
virNetworkPtr virNetworkCreateXML (virConnectPtr conn,
const char * xmlDesc)
virNetworkPtr virNetworkDefineXML (virConnectPtr conn,
const char * xml)
int virNetworkDestroy (virNetworkPtr network)
int virNetworkFree (virNetworkPtr network)
int virNetworkGetAutostart (virNetworkPtr network,
int * autostart)
char * virNetworkGetBridgeName (virNetworkPtr network)
virConnectPtr virNetworkGetConnect (virNetworkPtr net)
const char * virNetworkGetName (virNetworkPtr network)
int virNetworkGetUUID (virNetworkPtr network,
unsigned char * uuid)
int virNetworkGetUUIDString (virNetworkPtr network,
char * buf)
char * virNetworkGetXMLDesc (virNetworkPtr network,
int flags)
virNetworkPtr virNetworkLookupByName (virConnectPtr conn,
const char * name)
virNetworkPtr virNetworkLookupByUUID (virConnectPtr conn,
const unsigned char * uuid)
virNetworkPtr virNetworkLookupByUUIDString (virConnectPtr conn,
const char * uuidstr)
int virNetworkRef (virNetworkPtr network)
int virNetworkSetAutostart (virNetworkPtr network,
int autostart)
int virNetworkUndefine (virNetworkPtr network)
int virNodeDeviceFree (virNodeDevicePtr dev)
const char * virNodeDeviceGetName (virNodeDevicePtr dev)
const char * virNodeDeviceGetParent (virNodeDevicePtr dev)
char * virNodeDeviceGetXMLDesc (virNodeDevicePtr dev,
unsigned int flags)
int virNodeDeviceListCaps (virNodeDevicePtr dev,
char ** const names,
int maxnames)
virNodeDevicePtr virNodeDeviceLookupByName (virConnectPtr conn,
const char * name)
int virNodeDeviceNumOfCaps (virNodeDevicePtr dev)
int virNodeDeviceRef (virNodeDevicePtr dev)
int virNodeGetCellsFreeMemory (virConnectPtr conn,
unsigned long long * freeMems,
int startCell,
int maxCells)
unsigned long long virNodeGetFreeMemory (virConnectPtr conn)
int virNodeGetInfo (virConnectPtr conn,
virNodeInfoPtr info)
int virNodeListDevices (virConnectPtr conn,
const char * cap,
char ** const names,
int maxnames,
unsigned int flags)
int virNodeNumOfDevices (virConnectPtr conn,
const char * cap,
unsigned int flags)
int virStoragePoolBuild (virStoragePoolPtr pool,
unsigned int flags)
int virStoragePoolCreate (virStoragePoolPtr pool,
unsigned int flags)
virStoragePoolPtr virStoragePoolCreateXML (virConnectPtr conn,
const char * xmlDesc,
unsigned int flags)
virStoragePoolPtr virStoragePoolDefineXML (virConnectPtr conn,
const char * xml,
unsigned int flags)
int virStoragePoolDelete (virStoragePoolPtr pool,
unsigned int flags)
int virStoragePoolDestroy (virStoragePoolPtr pool)
int virStoragePoolFree (virStoragePoolPtr pool)
int virStoragePoolGetAutostart (virStoragePoolPtr pool,
int * autostart)
virConnectPtr virStoragePoolGetConnect (virStoragePoolPtr pool)
int virStoragePoolGetInfo (virStoragePoolPtr pool,
virStoragePoolInfoPtr info)
const char * virStoragePoolGetName (virStoragePoolPtr pool)
int virStoragePoolGetUUID (virStoragePoolPtr pool,
unsigned char * uuid)
int virStoragePoolGetUUIDString (virStoragePoolPtr pool,
char * buf)
char * virStoragePoolGetXMLDesc (virStoragePoolPtr pool,
unsigned int flags)
int virStoragePoolListVolumes (virStoragePoolPtr pool,
char ** const names,
int maxnames)
virStoragePoolPtr virStoragePoolLookupByName (virConnectPtr conn,
const char * name)
virStoragePoolPtr virStoragePoolLookupByUUID (virConnectPtr conn,
const unsigned char * uuid)
virStoragePoolPtr virStoragePoolLookupByUUIDString (virConnectPtr conn,
const char * uuidstr)
virStoragePoolPtr virStoragePoolLookupByVolume (virStorageVolPtr vol)
int virStoragePoolNumOfVolumes (virStoragePoolPtr pool)
int virStoragePoolRef (virStoragePoolPtr pool)
int virStoragePoolRefresh (virStoragePoolPtr pool,
unsigned int flags)
int virStoragePoolSetAutostart (virStoragePoolPtr pool,
int autostart)
int virStoragePoolUndefine (virStoragePoolPtr pool)
virStorageVolPtr virStorageVolCreateXML (virStoragePoolPtr pool,
const char * xmldesc,
unsigned int flags)
int virStorageVolDelete (virStorageVolPtr vol,
unsigned int flags)
int virStorageVolFree (virStorageVolPtr vol)
virConnectPtr virStorageVolGetConnect (virStorageVolPtr vol)
int virStorageVolGetInfo (virStorageVolPtr vol,
virStorageVolInfoPtr info)
const char * virStorageVolGetKey (virStorageVolPtr vol)
const char * virStorageVolGetName (virStorageVolPtr vol)
char * virStorageVolGetPath (virStorageVolPtr vol)
char * virStorageVolGetXMLDesc (virStorageVolPtr vol,
unsigned int flags)
virStorageVolPtr virStorageVolLookupByKey (virConnectPtr conn,
const char * key)
virStorageVolPtr virStorageVolLookupByName (virStoragePoolPtr pool,
const char * name)
virStorageVolPtr virStorageVolLookupByPath (virConnectPtr conn,
const char * path)
int virStorageVolRef (virStorageVolPtr vol)
Description
#define LIBVIR_VERSION_NUMBER
Macro providing the version of the library as version * 1,000,000 + minor * 1000 + micro
#define VIR_COPY_CPUMAP
This macro is to be used in conjunction with virDomainGetVcpus() and virDomainPinVcpu() APIs. VIR_COPY_CPUMAP macro extract the cpumap of the specified vcpu from cpumaps array and copy it into cpumap to be used later by virDomainPinVcpu() API.
#define VIR_CPU_MAPLEN
This macro is to be used in conjunction with virDomainPinVcpu() API. It returns the length (in bytes) required to store the complete CPU map between a single virtual & all physical CPUs of a domain.
#define VIR_CPU_USABLE
This macro is to be used in conjunction with virDomainGetVcpus() API. VIR_CPU_USABLE macro returns a non zero value (true) if the cpu is usable by the vcpu, and 0 otherwise.
#define VIR_DOMAIN_SCHED_FIELD_LENGTH
Macro providing the field length of virSchedParameter
#define VIR_GET_CPUMAP
This macro is to be used in conjunction with virDomainGetVcpus() and virDomainPinVcpu() APIs. VIR_GET_CPUMAP macro returns a pointer to the cpumap of the specified vcpu from cpumaps array.
#define VIR_NODEINFO_MAXCPUS
This macro is to calculate the total number of CPUs supported but not necessary active in the host.
#define VIR_UNUSE_CPU
This macro is to be used in conjunction with virDomainPinVcpu() API. USE_CPU macro reset the bit (CPU not usable) of the related cpu in cpumap.
#define VIR_USE_CPU
This macro is to be used in conjunction with virDomainPinVcpu() API. USE_CPU macro set the bit (CPU usable) of the related cpu in cpumap.
#define VIR_UUID_BUFLEN
This macro provides the length of the buffer required for virDomainGetUUID()
#define VIR_UUID_STRING_BUFLEN
This macro provides the length of the buffer required for virDomainGetUUIDString()
struct virConnect{
| The content of this structure is not made public by the API |
}
struct virConnectCredential{
| int | type | : One of virConnectCredentialType constants |
| const char * | prompt | : Prompt to show to user |
| const char * | challenge | : Additional challenge to show |
| const char * | defresult | : Optional default result |
| char * | result | : Result to be filled with user response (or defresult) |
| unsigned int | resultlen | : Length of the result |
}
enum virConnectCredentialType {
}
struct virDomain{
| The content of this structure is not made public by the API |
}
struct virDomainBlockStatsStruct{
| long long | rd_req | : number of read requests |
| long long | rd_bytes | : number of read bytes |
| long long | wr_req | : number of write requests |
| long long | wr_bytes | : number of written bytes |
| long long | errs | : In Xen this returns the mysterious 'oo_req'. |
}
enum virDomainCreateFlags {
}
enum virDomainEventDefinedDetailType {
}
enum virDomainEventResumedDetailType {
}
enum virDomainEventStartedDetailType {
}
enum virDomainEventStoppedDetailType {
}
enum virDomainEventSuspendedDetailType {
}
enum virDomainEventType {
}
enum virDomainEventUndefinedDetailType {
}
struct virDomainInfo{
| unsigned char | state | : the running state, one of virDomainState |
| unsigned long | maxMem | : the maximum memory in KBytes allowed |
| unsigned long | memory | : the memory in KBytes used by the domain |
| unsigned short | nrVirtCpu | : the number of virtual CPUs for the domain |
| unsigned long long | cpuTime | : the CPU time used in nanoseconds |
}
struct virDomainInterfaceStatsStruct{
| long long | rx_bytes |
| long long | rx_packets |
| long long | rx_errs |
| long long | rx_drop |
| long long | tx_bytes |
| long long | tx_packets |
| long long | tx_errs |
| long long | tx_drop |
}
enum virDomainMemoryFlags {
}
enum virDomainMigrateFlags {
}
enum virDomainXMLFlags {
}
enum virEventHandleType {
}
struct virNetwork{
| The content of this structure is not made public by the API |
}
struct virNodeDevice{
| The content of this structure is not made public by the API |
}
struct virNodeInfo{
| charmodel[32] | model | : string indicating the CPU model |
| unsigned long | memory | : memory size in kilobytes |
| unsigned int | cpus | : the number of active CPUs |
| unsigned int | mhz | : expected CPU frequency |
| unsigned int | nodes | : the number of NUMA cell, 1 for uniform mem access |
| unsigned int | sockets | : number of CPU socket per node |
| unsigned int | cores | : number of core per socket |
| unsigned int | threads | : number of threads per core |
}
struct virSchedParameter{
| charfield[VIR_DOMAIN_SCHED_FIELD_LENGTH] | field | : parameter name |
| int | type | : parameter type |
}
enum virSchedParameterType {
}
struct virStoragePool{
| The content of this structure is not made public by the API |
}
enum virStoragePoolBuildFlags {
}
enum virStoragePoolDeleteFlags {
}
struct virStoragePoolInfo{
| int | state | : virStoragePoolState flags |
| unsigned long long | capacity | : Logical size bytes |
| unsigned long long | allocation | : Current allocation bytes |
| unsigned long long | available | : Remaining free space bytes |
}
enum virStoragePoolState {
}
struct virStorageVol{
| The content of this structure is not made public by the API |
}
enum virStorageVolDeleteFlags {
}
struct virStorageVolInfo{
| int | type | : virStorageVolType flags |
| unsigned long long | capacity | : Logical size bytes |
| unsigned long long | allocation | : Current allocation bytes |
}
enum virStorageVolType {
}
struct virVcpuInfo{
| unsigned int | number | : virtual CPU number |
| int | state | : value from virVcpuState |
| unsigned long long | cpuTime | : CPU time used, in nanoseconds |
| int | cpu | : real CPU number, or -1 if offline |
}
typedef int (*virConnectAuthCallbackPtr) (virConnectCredentialPtr cred,
unsigned int ncred,
void * cbdata)
| cred: | |
| ncred: | |
| cbdata: | |
| Returns: | |
int virConnectClose (virConnectPtr conn)
This function closes the connection to the Hypervisor. This should not be called if further interaction with the Hypervisor are needed especially if there is running domain which need further monitoring by the application.
| conn: | pointer to the hypervisor connection |
| Returns: | 0 in case of success or -1 in case of error. |
typedef int (*virConnectDomainEventCallback) (virConnectPtr conn,
virDomainPtr dom,
int event,
int detail,
void * opaque)
A callback function to be registered, and called when a domain event occurs
| conn: | virConnect connection |
| dom: | The domain on which the event occured |
| event: | The specfic virDomainEventType which occured |
| detail: | event specific detail information |
| opaque: | opaque user data |
| Returns: | |
int virConnectDomainEventDeregister (virConnectPtr conn,
virConnectDomainEventCallback cb)
Removes a Domain Event Callback. De-registering for a domain callback will disable delivery of this event type
| conn: | pointer to the connection |
| cb: | callback to the function handling domain events |
| Returns: | 0 on success, -1 on failure |
int virConnectDomainEventRegister (virConnectPtr conn,
virConnectDomainEventCallback cb,
void * opaque,
virFreeCallback freecb)
Adds a Domain Event Callback. Registering for a domain callback will enable delivery of the events The virDomainPtr object handle passed into the callback upon delivery of an event is only valid for the duration of execution of the callback. If the callback wishes to keep the domain object after the callback
| conn: | pointer to the connection |
| cb: | callback to the function handling domain events |
| opaque: | opaque data to pass on to the callback |
| freecb: | optional function to deallocate opaque when not used anymore |
| Returns: | it shall take a reference to it, by calling virDomainRef. The reference can be released once the object is no longer required by calling virDomainFree. Returns 0 on success, -1 on failure |
char * virConnectFindStoragePoolSources (virConnectPtr conn,
const char * type,
const char * srcSpec,
unsigned int flags)
Talks to a storage backend and attempts to auto-discover the set of available storage pool sources. e.g. For iSCSI this would be a set of iSCSI targets. For NFS this would be a list of exported paths. The srcSpec (optional for some storage pool types, e.g. local ones) is an instance of the storage pool's source element specifying where to look for the pools. srcSpec is not required for some types (e.g., those querying local storage resources only)
| conn: | pointer to hypervisor connection |
| type: | type of storage pool sources to discover |
| srcSpec: | XML document specifying discovery source |
| flags: | flags for discovery (unused, pass 0) |
| Returns: | an xml document consisting of a SourceList element containing a source document appropriate to the given pool type for each discovered source. |
char * virConnectGetCapabilities (virConnectPtr conn)
Provides capabilities of the hypervisor / driver.
| conn: | pointer to the hypervisor connection |
| Returns: | NULL in case of error, or an XML string defining the capabilities. The client must free the returned string after use. |
char * virConnectGetHostname (virConnectPtr conn)
This returns the system hostname on which the hypervisor is running (the result of the gethostname(2) system call). If we are connected to a remote system, then this returns the hostname of the remote system.
| conn: | pointer to a hypervisor connection |
| Returns: | the hostname which must be freed by the caller, or NULL if there was an error. |
int virConnectGetMaxVcpus (virConnectPtr conn,
const char * type)
Provides the maximum number of virtual CPUs supported for a guest VM of a specific type. The 'type' parameter here corresponds to the 'type' attribute in the <domain> element of the XML.
| conn: | pointer to the hypervisor connection |
| type: | value of the 'type' attribute in the <domain> element |
| Returns: | the maximum of virtual CPU or -1 in case of error. |
const char * virConnectGetType (virConnectPtr conn)
Get the name of the Hypervisor software used.
| conn: | pointer to the hypervisor connection |
| Returns: | NULL in case of error, a static zero terminated string otherwise. See also: http://www.redhat.com/archives/libvir-list/2007-February/msg00096.html |
char * virConnectGetURI (virConnectPtr conn)
This returns the URI (name) of the hypervisor connection. Normally this is the same as or similar to the string passed to the virConnectOpen/virConnectOpenReadOnly call, but the driver may make the URI canonical. If name == NULL was passed to virConnectOpen, then the driver will return a non-NULL URI which can be used to connect to the same hypervisor later.
| conn: | pointer to a hypervisor connection |
| Returns: | the URI string which must be freed by the caller, or NULL if there was an error. |
int virConnectGetVersion (virConnectPtr conn,
unsigned long * hvVer)
Get the version level of the Hypervisor running. This may work only with hypervisor call, i.e. with privileged access to the hypervisor, not with a Read-Only connection.
| conn: | pointer to the hypervisor connection |
| hvVer: | return value for the version of the running hypervisor (OUT) |
| Returns: | -1 in case of error, 0 otherwise. if the version can't be extracted by lack of capacities returns 0 and @hvVer is 0, otherwise @hvVer value is major * 1,000,000 + minor * 1,000 + release |
int virConnectListDefinedDomains (virConnectPtr conn,
char ** const names,
int maxnames)
list the defined but inactive domains, stores the pointers to the names in @names
| conn: | pointer to the hypervisor connection |
| names: | pointer to an array to store the names |
| maxnames: | size of the array |
| Returns: | the number of names provided in the array or -1 in case of error |
int virConnectListDefinedNetworks (virConnectPtr conn,
char ** const names,
int maxnames)
list the inactive networks, stores the pointers to the names in @names
| conn: | pointer to the hypervisor connection |
| names: | pointer to an array to store the names |
| maxnames: | size of the array |
| Returns: | the number of names provided in the array or -1 in case of error |
int virConnectListDefinedStoragePools (virConnectPtr conn,
char ** const names,
int maxnames)
Provides the list of names of inactive storage pools upto maxnames. If there are more than maxnames, the remaining names will be silently ignored.
| conn: | pointer to hypervisor connection |
| names: | array of char * to fill with pool names (allocated by caller) |
| maxnames: | size of the names array |
| Returns: | 0 on success, -1 on error |
int virConnectListDomains (virConnectPtr conn,
int * ids,
int maxids)
Collect the list of active domains, and store their ID in @maxids
| conn: | pointer to the hypervisor connection |
| ids: | array to collect the list of IDs of active domains |
| maxids: | size of @ids |
| Returns: | the number of domain found or -1 in case of error |
int virConnectListNetworks (virConnectPtr conn,
char ** const names,
int maxnames)
Collect the list of active networks, and store their names in @names
| conn: | pointer to the hypervisor connection |
| names: | array to collect the list of names of active networks |
| maxnames: | size of @names |
| Returns: | the number of networks found or -1 in case of error |
int virConnectListStoragePools (virConnectPtr conn,
char ** const names,
int maxnames)
Provides the list of names of active storage pools upto maxnames. If there are more than maxnames, the remaining names will be silently ignored.
| conn: | pointer to hypervisor connection |
| names: | array of char * to fill with pool names (allocated by caller) |
| maxnames: | size of the names array |
| Returns: | 0 on success, -1 on error |
int virConnectNumOfDefinedDomains (virConnectPtr conn)
Provides the number of defined but inactive domains.
| conn: | pointer to the hypervisor connection |
| Returns: | the number of domain found or -1 in case of error |
int virConnectNumOfDefinedNetworks (virConnectPtr conn)
Provides the number of inactive networks.
| conn: | pointer to the hypervisor connection |
| Returns: | the number of networks found or -1 in case of error |
int virConnectNumOfDefinedStoragePools (virConnectPtr conn)
Provides the number of inactive storage pools
| conn: | pointer to hypervisor connection |
| Returns: | the number of pools found, or -1 on error |
int virConnectNumOfDomains (virConnectPtr conn)
Provides the number of active domains.
| conn: | pointer to the hypervisor connection |
| Returns: | the number of domain found or -1 in case of error |
int virConnectNumOfNetworks (virConnectPtr conn)
Provides the number of active networks.
| conn: | pointer to the hypervisor connection |
| Returns: | the number of network found or -1 in case of error |
int virConnectNumOfStoragePools (virConnectPtr conn)
Provides the number of active storage pools
| conn: | pointer to hypervisor connection |
| Returns: | the number of pools found, or -1 on error |
virConnectPtr virConnectOpen (const char * name)
This function should be called first to get a connection to the Hypervisor and xen store
| name: | URI of the hypervisor |
| Returns: | a pointer to the hypervisor connection or NULL in case of error URIs are documented at http://libvirt.org/uri.html |
virConnectPtr virConnectOpenAuth (const char * name,
virConnectAuthPtr auth,
int flags)
This function should be called first to get a connection to the Hypervisor. If necessary, authentication will be performed fetching credentials via the callback
| name: | URI of the hypervisor |
| auth: | Authenticate callback parameters |
| flags: | Open flags |
| Returns: | a pointer to the hypervisor connection or NULL in case of error URIs are documented at http://libvirt.org/uri.html |
virConnectPtr virConnectOpenReadOnly (const char * name)
This function should be called first to get a restricted connection to the library functionalities. The set of APIs usable are then restricted on the available methods to control the domains.
| name: | URI of the hypervisor |
| Returns: | a pointer to the hypervisor connection or NULL in case of error URIs are documented at http://libvirt.org/uri.html |
int virConnectRef (virConnectPtr conn)
Increment the reference count on the connection. For each additional call to this method, there shall be a corresponding call to virConnectClose to release the reference count, once the caller no longer needs the reference to this object. This method is typically useful for applications where multiple threads are using a connection, and it is required that the connection remain open until all threads have finished using it. ie, each new thread using a connection would increment the reference count.
| conn: | the connection to hold a reference on |
| Returns: | |
int virDomainAttachDevice (virDomainPtr domain,
const char * xml)
Create a virtual device attachment to backend.
| domain: | pointer to domain object |
| xml: | pointer to XML description of one device |
| Returns: | 0 in case of success, -1 in case of failure. |
int virDomainBlockPeek (virDomainPtr dom,
const char * path,
unsigned long long offset,
size_t size,
void * buffer,
unsigned int flags)
This function allows you to read the contents of a domain's disk device. Typical uses for this are to determine if the domain has written a Master Boot Record (indicating that the domain has completed installation), or to try to work out the state of the domain's filesystems. (Note that in the local case you might try to open the block device or file directly, but that won't work in the remote case, nor if you don't have sufficient permission. Hence the need for this call). 'path' must be a device or file corresponding to the domain. In other words it must be the precise string returned in a <disk><source dev='...'/></disk> from virDomainGetXMLDesc. 'offset' and 'size' represent an area which must lie entirely within the device or file. 'size' may be 0 to test if the call would succeed. 'buffer' is the return buffer and must be at least 'size' bytes. NB. The remote driver imposes a 64K byte limit on 'size'. For your program to be able to work reliably over a remote connection you should split large requests to <= 65536 bytes.
| dom: | pointer to the domain object |
| path: | path to the block device |
| offset: | offset within block device |
| size: | size to read |
| buffer: | return buffer (must be at least size bytes) |
| flags: | unused, always pass 0 |
| Returns: | 0 in case of success or -1 in case of failure. really 64 bits |
int virDomainBlockStats (virDomainPtr dom,
const char * path,
virDomainBlockStatsPtr stats,
size_t size)
This function returns block device (disk) stats for block devices attached to the domain. The path parameter is the name of the block device. Get this by calling virDomainGetXMLDesc and finding the <target dev='...'> attribute within //domain/devices/disk. (For example, "xvda"). Domains may have more than one block device. To get stats for each you should make multiple calls to this function. Individual fields within the stats structure may be returned as -1, which indicates that the hypervisor does not support that particular statistic.
| dom: | pointer to the domain object |
| path: | path to the block device |
| stats: | block device stats (returned) |
| size: | size of stats structure |
| Returns: | 0 in case of success or -1 in case of failure. |
int virDomainCoreDump (virDomainPtr domain,
const char * to,
int flags)
This method will dump the core of a domain on a given file for analysis. Note that for remote Xen Daemon the file path will be interpreted in the remote host.
| domain: | a domain object |
| to: | path for the core file |
| flags: | extra flags, currently unused |
| Returns: | 0 in case of success and -1 in case of failure. |
int virDomainCreate (virDomainPtr domain)
launch a defined domain. If the call succeed the domain moves from the defined to the running domains pools.
| domain: | pointer to a defined domain |
| Returns: | 0 in case of success, -1 in case of error |
virDomainPtr virDomainCreateLinux (virConnectPtr conn,
const char * xmlDesc,
unsigned int flags)
Deprecated after 0.4.6. Renamed to virDomainCreateXML() providing identical functionality. This existing name will left indefinitely for API compatability.
| conn: | pointer to the hypervisor connection |
| xmlDesc: | string containing an XML description of the domain |
| flags: | callers should always pass 0 |
| Returns: | a new domain object or NULL in case of failure |
virDomainPtr virDomainCreateXML (virConnectPtr conn,
const char * xmlDesc,
unsigned int flags)
Launch a new guest domain, based on an XML description similar to the one returned by virDomainGetXMLDesc() This function may requires privileged access to the hypervisor. The domain is not persistent, so its definition will disappear when it is destroyed, or if the host is restarted (see virDomainDefineXML() to define persistent domains).
| conn: | pointer to the hypervisor connection |
| xmlDesc: | string containing an XML description of the domain |
| flags: | callers should always pass 0 |
| Returns: | a new domain object or NULL in case of failure |
virDomainPtr virDomainDefineXML (virConnectPtr conn,
const char * xml)
Define a domain, but does not start it. This definition is persistent, until explicitly undefined with virDomainUndefine().
| conn: | pointer to the hypervisor connection |
| xml: | the XML description for the domain, preferably in UTF-8 |
| Returns: | NULL in case of error, a pointer to the domain otherwise |
int virDomainDestroy (virDomainPtr domain)
Destroy the domain object. The running instance is shutdown if not down already and all resources used by it are given back to the hypervisor. This does not free the associated virDomainPtr object. This function may require privileged access
| domain: | a domain object |
| Returns: | 0 in case of success and -1 in case of failure. |
int virDomainDetachDevice (virDomainPtr domain,
const char * xml)
Destroy a virtual device attachment to backend.
| domain: | pointer to domain object |
| xml: | pointer to XML description of one device |
| Returns: | 0 in case of success, -1 in case of failure. |
int virDomainFree (virDomainPtr domain)
Free the domain object. The running instance is kept alive. The data structure is freed and should not be used thereafter.
| domain: | a domain object |
| Returns: | 0 in case of success and -1 in case of failure. |
int virDomainGetAutostart (virDomainPtr domain,
int * autostart)
Provides a boolean value indicating whether the domain configured to be automatically started when the host machine boots.
| domain: | a domain object |
| autostart: | the value returned |
| Returns: | -1 in case of error, 0 in case of success |
virConnectPtr virDomainGetConnect (virDomainPtr dom)
Provides the connection pointer associated with a domain. The reference counter on the connection is not increased by this call. WARNING: When writing libvirt bindings in other languages, do not use this function. Instead, store the connection and the domain object together.
| dom: | pointer to a domain |
| Returns: | the virConnectPtr or NULL in case of failure. |
unsigned int virDomainGetID (virDomainPtr domain)
Get the hypervisor ID number for the domain
| domain: | a domain object |
| Returns: | the domain ID number or (unsigned int) -1 in case of error |
int virDomainGetInfo (virDomainPtr domain,
virDomainInfoPtr info)
Extract information about a domain. Note that if the connection used to get the domain is limited only a partial set of the information can be extracted.
| domain: | a domain object |
| info: | pointer to a virDomainInfo structure allocated by the user |
| Returns: | 0 in case of success and -1 in case of failure. |
unsigned long virDomainGetMaxMemory (virDomainPtr domain)
Retrieve the maximum amount of physical memory allocated to a domain. If domain is NULL, then this get the amount of memory reserved to Domain0 i.e. the domain where the application runs.
| domain: | a domain object or NULL |
| Returns: | the memory size in kilobytes or 0 in case of error. |
int virDomainGetMaxVcpus (virDomainPtr domain)
Provides the maximum number of virtual CPUs supported for the guest VM. If the guest is inactive, this is basically the same as virConnectGetMaxVcpus. If the guest is running this will reflect the maximum number of virtual CPUs the guest was booted with.
| domain: | pointer to domain object |
| Returns: | the maximum of virtual CPU or -1 in case of error. |
const char * virDomainGetName (virDomainPtr domain)
Get the public name for that domain
| domain: | a domain object |
| Returns: | a pointer to the name or NULL, the string need not be deallocated its lifetime will be the same as the domain object. |
char * virDomainGetOSType (virDomainPtr domain)
Get the type of domain operation system.
| domain: | a domain object |
| Returns: | the new string or NULL in case of error, the string must be freed by the caller. |
int virDomainGetSchedulerParameters (virDomainPtr domain,
virSchedParameterPtr params,
int * nparams)
Get the scheduler parameters, the @params array will be filled with the values.
| domain: | pointer to domain object |
| params: | pointer to scheduler parameter object (return value) |
| nparams: | pointer to number of scheduler parameter (this value should be same than the returned value nparams of virDomainGetSchedulerType) |
| Returns: | -1 in case of error, 0 in case of success. |
char * virDomainGetSchedulerType (virDomainPtr domain,
int * nparams)
Get the scheduler type.
| domain: | pointer to domain object |
| nparams: | number of scheduler parameters(return value) |
| Returns: | NULL in case of error. The caller must free the returned string. |
int virDomainGetUUID (virDomainPtr domain,
unsigned char * uuid)
Get the UUID for a domain
| domain: | a domain object |
| uuid: | pointer to a VIR_UUID_BUFLEN bytes array |
| Returns: | -1 in case of error, 0 in case of success |
int virDomainGetUUIDString (virDomainPtr domain,
char * buf)
Get the UUID for a domain as string. For more information about UUID see RFC4122.
| domain: | a domain object |
| buf: | pointer to a VIR_UUID_STRING_BUFLEN bytes array |
| Returns: | -1 in case of error, 0 in case of success |
int virDomainGetVcpus (virDomainPtr domain,
virVcpuInfoPtr info,
int maxinfo,
unsigned char * cpumaps,
int maplen)
Extract information about virtual CPUs of domain, store it in info array and also in cpumaps if this pointer isn't NULL.
| domain: | pointer to domain object, or NULL for Domain0 |
| info: | pointer to an array of virVcpuInfo structures (OUT) |
| maxinfo: | number of structures in info array |
| cpumaps: | pointer to an bit map of real CPUs for all vcpus of this domain (in 8-bit bytes) (OUT) If cpumaps is NULL, then no cpumap information is returned by the API. It's assumed there is <maxinfo> cpumap in cpumaps array. The memory allocated to cpumaps must be (maxinfo * maplen) bytes (ie: calloc(maxinfo, maplen)). One cpumap inside cpumaps has the format described in virDomainPinVcpu() API. |
| maplen: | number of bytes in one cpumap, from 1 up to size of CPU map in underlying virtualization system (Xen...). |
| Returns: | the number of info filled in case of success, -1 in case of failure. |
char * virDomainGetXMLDesc (virDomainPtr domain,
int flags)
Provide an XML description of the domain. The description may be reused later to relaunch the domain with virDomainCreateXML().
| domain: | a domain object |
| flags: | an OR'ed set of virDomainXMLFlags |
| Returns: | a 0 terminated UTF-8 encoded XML instance, or NULL in case of error. the caller must free() the returned value. |
int virDomainInterfaceStats (virDomainPtr dom,
const char * path,
virDomainInterfaceStatsPtr stats,
size_t size)
This function returns network interface stats for interfaces attached to the domain. The path parameter is the name of the network interface. Domains may have more than network interface. To get stats for each you should make multiple calls to this function. Individual fields within the stats structure may be returned as -1, which indicates that the hypervisor does not support that particular statistic.
| dom: | pointer to the domain object |
| path: | path to the interface |
| stats: | network interface stats (returned) |
| size: | size of stats structure |
| Returns: | 0 in case of success or -1 in case of failure. |
virDomainPtr virDomainLookupByID (virConnectPtr conn,
int id)
Try to find a domain based on the hypervisor ID number Note that this won't work for inactive domains which have an ID of -1, in that case a lookup based on the Name or UUId need to be done instead.
| conn: | pointer to the hypervisor connection |
| id: | the domain ID number |
| Returns: | a new domain object or NULL in case of failure. If the domain cannot be found, then VIR_ERR_NO_DOMAIN error is raised. |
virDomainPtr virDomainLookupByName (virConnectPtr conn,
const char * name)
Try to lookup a domain on the given hypervisor based on its name.
| conn: | pointer to the hypervisor connection |
| name: | name for the domain |
| Returns: | a new domain object or NULL in case of failure. If the domain cannot be found, then VIR_ERR_NO_DOMAIN error is raised. |
virDomainPtr virDomainLookupByUUID (virConnectPtr conn,
const unsigned char * uuid)
Try to lookup a domain on the given hypervisor based on its UUID.
| conn: | pointer to the hypervisor connection |
| uuid: | the raw UUID for the domain |
| Returns: | a new domain object or NULL in case of failure. If the domain cannot be found, then VIR_ERR_NO_DOMAIN error is raised. |
virDomainPtr virDomainLookupByUUIDString (virConnectPtr conn,
const char * uuidstr)
Try to lookup a domain on the given hypervisor based on its UUID.
| conn: | pointer to the hypervisor connection |
| uuidstr: | the string UUID for the domain |
| Returns: | a new domain object or NULL in case of failure. If the domain cannot be found, then VIR_ERR_NO_DOMAIN error is raised. |
int virDomainMemoryPeek (virDomainPtr dom,
unsigned long long start,
size_t size,
void * buffer,
unsigned int flags)
This function allows you to read the contents of a domain's memory. The memory which is read is controlled by the 'start', 'size' and 'flags' parameters. If 'flags' is VIR_MEMORY_VIRTUAL then the 'start' and 'size' parameters are interpreted as virtual memory addresses for whichever task happens to be running on the domain at the moment. Although this sounds haphazard it is in fact what you want in order to read Linux kernel state, because it ensures that pointers in the kernel image can be interpreted coherently. 'buffer' is the return buffer and must be at least 'size' bytes. 'size' may be 0 to test if the call would succeed. NB. The remote driver imposes a 64K byte limit on 'size'. For your program to be able to work reliably over a remote connection you should split large requests to <= 65536 bytes.
| dom: | pointer to the domain object |
| start: | start of memory to peek |
| size: | size of memory to peek |
| buffer: | return buffer (must be at least size bytes) |
| flags: | flags, see below |
| Returns: | 0 in case of success or -1 in case of failure. really 64 bits |
virDomainPtr virDomainMigrate (virDomainPtr domain,
virConnectPtr dconn,
unsigned long flags,
const char * dname,
const char * uri,
unsigned long bandwidth)
Migrate the domain object from its current host to the destination host given by dconn (a connection to the destination host). Flags may be one of more of the following: VIR_MIGRATE_LIVE Attempt a live migration. If a hypervisor supports renaming domains during migration, then you may set the dname parameter to the new name (otherwise it keeps the same name). If this is not supported by the hypervisor, dname must be NULL or else you will get an error. Since typically the two hypervisors connect directly to each other in order to perform the migration, you may need to specify a path from the source to the destination. This is the purpose of the uri parameter. If uri is NULL, then libvirt will try to find the best method. Uri may specify the hostname or IP address of the destination host as seen from the source. Or uri may be a URI giving transport, hostname, user, port, etc. in the usual form. Refer to driver documentation for the particular URIs supported. The maximum bandwidth (in Mbps) that will be used to do migration can be specified with the bandwidth parameter. If set to 0, libvirt will choose a suitable default. Some hypervisors do not support this feature and will return an error if bandwidth is not 0. To see which features are supported by the current hypervisor, see virConnectGetCapabilities, /capabilities/host/migration_features. There are many limitations on migration imposed by the underlying technology - for example it may not be possible to migrate between different processors even with the same architecture, or between different types of hypervisor.
| domain: | a domain object |
| dconn: | destination host (a connection object) |
| flags: | flags |
| dname: | (optional) rename domain to this at destination |
| uri: | (optional) dest hostname/URI as seen from the source host |
| bandwidth: | (optional) specify migration bandwidth limit in Mbps |
| Returns: | the new domain object if the migration was successful, or NULL in case of error. Note that the new domain object exists in the scope of the destination connection (dconn). |
int virDomainPinVcpu (virDomainPtr domain,
unsigned int vcpu,
unsigned char * cpumap,
int maplen)
Dynamically change the real CPUs which can be allocated to a virtual CPU. This function requires privileged access to the hypervisor.
| domain: | pointer to domain object, or NULL for Domain0 |
| vcpu: | virtual CPU number |
| cpumap: | pointer to a bit map of real CPUs (in 8-bit bytes) (IN) Each bit set to 1 means that corresponding CPU is usable. Bytes are stored in little-endian order: CPU0-7, 8-15... In each byte, lowest CPU number is least significant bit. |
| maplen: | number of bytes in cpumap, from 1 up to size of CPU map in underlying virtualization system (Xen...). If maplen < size, missing bytes are set to zero. If maplen > size, failure code is returned. |
| Returns: | 0 in case of success, -1 in case of failure. |
int virDomainReboot (virDomainPtr domain,
unsigned int flags)
Reboot a domain, the domain object is still usable there after but the domain OS is being stopped for a restart. Note that the guest OS may ignore the request.
| domain: | a domain object |
| flags: | extra flags for the reboot operation, not used yet |
| Returns: | 0 in case of success and -1 in case of failure. |
int virDomainRef (virDomainPtr domain)
Increment the reference count on the domain. For each additional call to this method, there shall be a corresponding call to virDomainFree to release the reference count, once the caller no longer needs the reference to this object. This method is typically useful for applications where multiple threads are using a connection, and it is required that the connection remain open until all threads have finished using it. ie, each new thread using a domain would increment the reference count.
int virDomainRestore (virConnectPtr conn,
const char * from)
This method will restore a domain saved to disk by virDomainSave().
| conn: | pointer to the hypervisor connection |
| from: | path to the |
| Returns: | 0 in case of success and -1 in case of failure. |
int virDomainResume (virDomainPtr domain)
Resume an suspended domain, the process is restarted from the state where it was frozen by calling virSuspendDomain(). This function may requires privileged access
| domain: | a domain object |
| Returns: | 0 in case of success and -1 in case of failure. |
int virDomainSave (virDomainPtr domain,
const char * to)
This method will suspend a domain and save its memory contents to a file on disk. After the call, if successful, the domain is not listed as running anymore (this may be a problem). Use virDomainRestore() to restore a domain after saving.
| domain: | a domain object |
| to: | path for the output file |
| Returns: | 0 in case of success and -1 in case of failure. |
int virDomainSetAutostart (virDomainPtr domain,
int autostart)
Configure the domain to be automatically started when the host machine boots.
| domain: | a domain object |
| autostart: | whether the domain should be automatically started 0 or 1 |
| Returns: | -1 in case of error, 0 in case of success |
int virDomainSetMaxMemory (virDomainPtr domain,
unsigned long memory)
Dynamically change the maximum amount of physical memory allocated to a domain. If domain is NULL, then this change the amount of memory reserved to Domain0 i.e. the domain where the application runs. This function requires privileged access to the hypervisor.
| domain: | a domain object or NULL |
| memory: | the memory size in kilobytes |
| Returns: | 0 in case of success and -1 in case of failure. |
int virDomainSetMemory (virDomainPtr domain,
unsigned long memory)
Dynamically change the target amount of physical memory allocated to a domain. If domain is NULL, then this change the amount of memory reserved to Domain0 i.e. the domain where the application runs. This function may requires privileged access to the hypervisor.
| domain: | a domain object or NULL |
| memory: | the memory size in kilobytes |
| Returns: | 0 in case of success and -1 in case of failure. |
int virDomainSetSchedulerParameters (virDomainPtr domain,
virSchedParameterPtr params,
int nparams)
Change the scheduler parameters
| domain: | pointer to domain object |
| params: | pointer to scheduler parameter objects |
| nparams: | number of scheduler parameter (this value should be same or less than the returned value nparams of virDomainGetSchedulerType) |
| Returns: | -1 in case of error, 0 in case of success. |
int virDomainSetVcpus (virDomainPtr domain,
unsigned int nvcpus)
Dynamically change the number of virtual CPUs used by the domain. Note that this call may fail if the underlying virtualization hypervisor does not support it or if growing the number is arbitrary limited. This function requires privileged access to the hypervisor.
| domain: | pointer to domain object, or NULL for Domain0 |
| nvcpus: | the new number of virtual CPUs for this domain |
| Returns: | 0 in case of success, -1 in case of failure. |
int virDomainShutdown (virDomainPtr domain)
Shutdown a domain, the domain object is still usable there after but the domain OS is being stopped. Note that the guest OS may ignore the request. TODO: should we add an option for reboot, knowing it may not be doable in the general case ?
| domain: | a domain object |
| Returns: | 0 in case of success and -1 in case of failure. |
int virDomainSuspend (virDomainPtr domain)
Suspends an active domain, the process is frozen without further access to CPU resources and I/O but the memory used by the domain at the hypervisor level will stay allocated. Use virDomainResume() to reactivate the domain. This function may requires privileged access.
| domain: | a domain object |
| Returns: | 0 in case of success and -1 in case of failure. |
int virDomainUndefine (virDomainPtr domain)
Undefine a domain but does not stop it if it is running
| domain: | pointer to a defined domain |
| Returns: | 0 in case of success, -1 in case of error |
typedef int (*virEventAddHandleFunc ) (int fd,
int event,
virEventHandleCallback cb,
void * opaque,
virFreeCallback ff)
Part of the EventImpl, this callback Adds a file handle callback to listen for specific events. The same file handle can be registered multiple times provided the requested event sets are non-overlapping If the opaque user data requires free'ing when the handle is unregistered, then a 2nd callback can be supplied for this purpose.
| fd: | file descriptor to listen on |
| event: | bitset of events on which to fire the callback |
| cb: | the callback to be called when an event occurrs |
| opaque: | user data to pass to the callback |
| ff: | the callback invoked to free opaque data blob |
| Returns: | a handle watch number to be used for updating and unregistering for events |
typedef int (*virEventAddTimeoutFunc ) (int timeout,
virEventTimeoutCallback cb,
void * opaque,
virFreeCallback ff)
Part of the EventImpl, this user-defined callback handles adding an event timeout. If the opaque user data requires free'ing when the handle is unregistered, then a 2nd callback can be supplied for this purpose.
| timeout: | The timeout to monitor |
| cb: | the callback to call when timeout has expired |
| opaque: | user data to pass to the callback |
| ff: | the callback invoked to free opaque data blob |
| Returns: | a timer value |
typedef void (*virEventHandleCallback ) (int watch,
int fd,
int events,
void * opaque)
Callback for receiving file handle events. The callback will be invoked once for each event which is pending.
| watch: | watch on which the event occurred |
| fd: | file handle on which the event occurred |
| events: | bitset of events from virEventHandleType constants |
| opaque: | user data registered with handle |
void virEventRegisterImpl (virEventAddHandleFunc addHandle,
virEventUpdateHandleFunc updateHandle,
virEventRemoveHandleFunc removeHandle,
virEventAddTimeoutFunc addTimeout,
virEventUpdateTimeoutFunc updateTimeout,
virEventRemoveTimeoutFunc removeTimeout)
| addHandle: | |
| updateHandle: | |
| removeHandle: | |
| addTimeout: | |
| updateTimeout: | |
| removeTimeout: | |
typedef int (*virEventRemoveHandleFunc) (int watch)
Part of the EventImpl, this user-provided callback is notified when an fd is no longer being listened on. If a virEventHandleFreeFunc was supplied when the handle was registered, it will be invoked some time during, or after this function call, when it is safe to release the user data.
| watch: | file descriptor watch to stop listening on |
| Returns: | |
typedef int (*virEventRemoveTimeoutFunc) (int timer)
Part of the EventImpl, this user-defined callback removes a timer If a virEventTimeoutFreeFunc was supplied when the handle was registered, it will be invoked some time during, or after this function call, when it is safe to release the user data.
| timer: | the timer to remove |
| Returns: | 0 on success, -1 on failure |
typedef void (*virEventTimeoutCallback ) (int timer,
void * opaque)
callback for receiving timer events
| timer: | timer id emitting the event |
| opaque: | user data registered with handle |
typedef void (*virEventUpdateHandleFunc) (int watch,
int event)
Part of the EventImpl, this user-provided callback is notified when events to listen on change
| watch: | file descriptor watch to modify |
| event: | new events to listen on |
typedef void (*virEventUpdateTimeoutFunc) (int timer,
int timeout)
Part of the EventImpl, this user-defined callback updates an event timeout.
| timer: | the timer to modify |
| timeout: | the new timeout value |
typedef void (*virFreeCallback ) (void * opaque)
int virGetVersion (unsigned long * libVer,
const char * type,
unsigned long * typeVer)
Provides two information back, @libVer is the version of the library while @typeVer will be the version of the hypervisor type @type against which the library was compiled. If @type is NULL, "Xen" is assumed, if @type is unknown or not available, an error code will be returned and @typeVer will be 0.
| libVer: | return value for the library version (OUT) |
| type: | the type of connection/driver looked at |
| typeVer: | return value for the version of the hypervisor (OUT) |
| Returns: | -1 in case of failure, 0 otherwise, and values for @libVer and @typeVer have the format major * 1,000,000 + minor * 1,000 + release. |
int virInitialize (void)
Initialize the library. It's better to call this routine at startup in multithreaded applications to avoid potential race when initializing the library.
| Returns: | 0 in case of success, -1 in case of error |
int virNetworkCreate (virNetworkPtr network)
Create and start a defined network. If the call succeed the network moves from the defined to the running networks pools.
| network: | pointer to a defined network |
| Returns: | 0 in case of success, -1 in case of error |
virNetworkPtr virNetworkCreateXML (virConnectPtr conn,
const char * xmlDesc)
Create and start a new virtual network, based on an XML description similar to the one returned by virNetworkGetXMLDesc()
| conn: | pointer to the hypervisor connection |
| xmlDesc: | an XML description of the network |
| Returns: | a new network object or NULL in case of failure |
virNetworkPtr virNetworkDefineXML (virConnectPtr conn,
const char * xml)
Define a network, but does not create it
| conn: | pointer to the hypervisor connection |
| xml: | the XML description for the network, preferably in UTF-8 |
| Returns: | NULL in case of error, a pointer to the network otherwise |
int virNetworkDestroy (virNetworkPtr network)
Destroy the network object. The running instance is shutdown if not down already and all resources used by it are given back to the hypervisor. This does not free the associated virNetworkPtr object. This function may require privileged access
| network: | a network object |
| Returns: | 0 in case of success and -1 in case of failure. |
int virNetworkFree (virNetworkPtr network)
Free the network object. The running instance is kept alive. The data structure is freed and should not be used thereafter.
| network: | a network object |
| Returns: | 0 in case of success and -1 in case of failure. |
int virNetworkGetAutostart (virNetworkPtr network,
int * autostart)
Provides a boolean value indicating whether the network configured to be automatically started when the host machine boots.
| network: | a network object |
| autostart: | the value returned |
| Returns: | -1 in case of error, 0 in case of success |
char * virNetworkGetBridgeName (virNetworkPtr network)
Provides a bridge interface name to which a domain may connect a network interface in order to join the network.
| network: | a network object |
| Returns: | a 0 terminated interface name, or NULL in case of error. the caller must free() the returned value. |
virConnectPtr virNetworkGetConnect (virNetworkPtr net)
Provides the connection pointer associated with a network. The reference counter on the connection is not increased by this call. WARNING: When writing libvirt bindings in other languages, do not use this function. Instead, store the connection and the network object together.
| net: | pointer to a network |
| Returns: | the virConnectPtr or NULL in case of failure. |
const char * virNetworkGetName (virNetworkPtr network)
Get the public name for that network
| network: | a network object |
| Returns: | a pointer to the name or NULL, the string need not be deallocated its lifetime will be the same as the network object. |
int virNetworkGetUUID (virNetworkPtr network,
unsigned char * uuid)
Get the UUID for a network
| network: | a network object |
| uuid: | pointer to a VIR_UUID_BUFLEN bytes array |
| Returns: | -1 in case of error, 0 in case of success |
int virNetworkGetUUIDString (virNetworkPtr network,
char * buf)
Get the UUID for a network as string. For more information about UUID see RFC4122.
| network: | a network object |
| buf: | pointer to a VIR_UUID_STRING_BUFLEN bytes array |
| Returns: | -1 in case of error, 0 in case of success |
char * virNetworkGetXMLDesc (virNetworkPtr network,
int flags)
Provide an XML description of the network. The description may be reused later to relaunch the network with virNetworkCreateXML().
| network: | a network object |
| flags: | and OR'ed set of extraction flags, not used yet |
| Returns: | a 0 terminated UTF-8 encoded XML instance, or NULL in case of error. the caller must free() the returned value. |
virNetworkPtr virNetworkLookupByName (virConnectPtr conn,
const char * name)
Try to lookup a network on the given hypervisor based on its name.
| conn: | pointer to the hypervisor connection |
| name: | name for the network |
| Returns: | a new network object or NULL in case of failure. If the network cannot be found, then VIR_ERR_NO_NETWORK error is raised. |
virNetworkPtr virNetworkLookupByUUID (virConnectPtr conn,
const unsigned char * uuid)
Try to lookup a network on the given hypervisor based on its UUID.
| conn: | pointer to the hypervisor connection |
| uuid: | the raw UUID for the network |
| Returns: | a new network object or NULL in case of failure. If the network cannot be found, then VIR_ERR_NO_NETWORK error is raised. |
virNetworkPtr virNetworkLookupByUUIDString (virConnectPtr conn,
const char * uuidstr)
Try to lookup a network on the given hypervisor based on its UUID.
| conn: | pointer to the hypervisor connection |
| uuidstr: | the string UUID for the network |
| Returns: | a new network object or NULL in case of failure. If the network cannot be found, then VIR_ERR_NO_NETWORK error is raised. |
int virNetworkRef (virNetworkPtr network)
Increment the reference count on the network. For each additional call to this method, there shall be a corresponding call to virNetworkFree to release the reference count, once the caller no longer needs the reference to this object. This method is typically useful for applications where multiple threads are using a connection, and it is required that the connection remain open until all threads have finished using it. ie, each new thread using a network would increment the reference count.
int virNetworkSetAutostart (virNetworkPtr network,
int autostart)
Configure the network to be automatically started when the host machine boots.
| network: | a network object |
| autostart: | whether the network should be automatically started 0 or 1 |
| Returns: | -1 in case of error, 0 in case of success |
int virNetworkUndefine (virNetworkPtr network)
Undefine a network but does not stop it if it is running
| network: | pointer to a defined network |
| Returns: | 0 in case of success, -1 in case of error |
int virNodeDeviceFree (virNodeDevicePtr dev)
Drops a reference to the node device, freeing it if this was the last reference.
| dev: | pointer to the node device |
| Returns: | the 0 for success, -1 for error. |
const char * virNodeDeviceGetName (virNodeDevicePtr dev)
Just return the device name
| dev: | the device |
| Returns: | the device name or NULL in case of error |
const char * virNodeDeviceGetParent (virNodeDevicePtr dev)
Accessor for the parent of the device
| dev: | the device |
| Returns: | the name of the device's parent, or NULL if the device has no parent. |
char * virNodeDeviceGetXMLDesc (virNodeDevicePtr dev,
unsigned int flags)
Fetch an XML document describing all aspects of the device.
| dev: | pointer to the node device |
| flags: | flags for XML generation (unused, pass 0) |
| Returns: | the XML document, or NULL on error |
int virNodeDeviceListCaps (virNodeDevicePtr dev,
char ** const names,
int maxnames)
Lists the names of the capabilities supported by the device.
| dev: | the device |
| names: | array to collect the list of capability names |
| maxnames: | size of @names |
| Returns: | the number of capability names listed in @names. |
virNodeDevicePtr virNodeDeviceLookupByName (virConnectPtr conn,
const char * name)
Lookup a node device by its name.
| conn: | pointer to the hypervisor connection |
| name: | unique device name |
| Returns: | a virNodeDevicePtr if found, NULL otherwise. |
int virNodeDeviceNumOfCaps (virNodeDevicePtr dev)
Accessor for the number of capabilities supported by the device.
| dev: | the device |
| Returns: | the number of capabilities supported by the device. |
int virNodeDeviceRef (virNodeDevicePtr dev)
Increment the reference count on the dev. For each additional call to this method, there shall be a corresponding call to virNodeDeviceFree to release the reference count, once the caller no longer needs the reference to this object. This method is typically useful for applications where multiple threads are using a connection, and it is required that the connection remain open until all threads have finished using it. ie, each new thread using a dev would increment the reference count.
int virNodeGetCellsFreeMemory (virConnectPtr conn,
unsigned long long * freeMems,
int startCell,
int maxCells)
This call returns the amount of free memory in one or more NUMA cells. The @freeMems array must be allocated by the caller and will be filled with the amount of free memory in kilobytes for each cell requested, starting with startCell (in freeMems[0]), up to either (startCell + maxCells), or the number of additional cells in the node, whichever is smaller.
| conn: | pointer to the hypervisor connection |
| freeMems: | pointer to the array of unsigned long long |
| startCell: | index of first cell to return freeMems info on. |
| maxCells: | Maximum number of cells for which freeMems information can be returned. |
| Returns: | the number of entries filled in freeMems, or -1 in case of error. |
unsigned long long virNodeGetFreeMemory (virConnectPtr conn)
provides the free memory available on the Node
| conn: | pointer to the hypervisor connection |
| Returns: | the available free memory in kilobytes or 0 in case of error |
int virNodeGetInfo (virConnectPtr conn,
virNodeInfoPtr info)
Extract hardware information about the node.
| conn: | pointer to the hypervisor connection |
| info: | pointer to a virNodeInfo structure allocated by the user |
| Returns: | 0 in case of success and -1 in case of failure. |
int virNodeListDevices (virConnectPtr conn,
const char * cap,
char ** const names,
int maxnames,
unsigned int flags)
Collect the list of node devices, and store their names in @names If the optional 'cap' argument is non-NULL, then the count will be restricted to devices with the specified capability
| conn: | pointer to the hypervisor connection |
| cap: | capability name |
| names: | array to collect the list of node device names |
| maxnames: | size of @names |
| flags: | flags (unused, pass 0) |
| Returns: | the number of node devices found or -1 in case of error |
int virNodeNumOfDevices (virConnectPtr conn,
const char * cap,
unsigned int flags)
Provides the number of node devices. If the optional 'cap' argument is non-NULL, then the count will be restricted to devices with the specified capability
| conn: | pointer to the hypervisor connection |
| cap: | capability name |
| flags: | flags (unused, pass 0) |
| Returns: | the number of node devices or -1 in case of error |
int virStoragePoolBuild (virStoragePoolPtr pool,
unsigned int flags)
Build the underlying storage pool
| pool: | pointer to storage pool |
| flags: | future flags, use 0 for now |
| Returns: | 0 on success, or -1 upon failure |
int virStoragePoolCreate (virStoragePoolPtr pool,
unsigned int flags)
Starts an inactive storage pool
| pool: | pointer to storage pool |
| flags: | future flags, use 0 for now |
| Returns: | 0 on success, or -1 if it could not be started |
virStoragePoolPtr virStoragePoolCreateXML (virConnectPtr conn,
const char * xmlDesc,
unsigned int flags)
Create a new storage based on its XML description. The pool is not persistent, so its definition will disappear when it is destroyed, or if the host is restarted
| conn: | pointer to hypervisor connection |
| xmlDesc: | XML description for new pool |
| flags: | future flags, use 0 for now |
| Returns: | a virStoragePoolPtr object, or NULL if creation failed |
virStoragePoolPtr virStoragePoolDefineXML (virConnectPtr conn,
const char * xml,
unsigned int flags)
Define a new inactive storage pool based on its XML description. The pool is persistent, until explicitly undefined.
| conn: | pointer to hypervisor connection |
| xml: | XML description for new pool |
| flags: | future flags, use 0 for now |
| Returns: | a virStoragePoolPtr object, or NULL if creation failed |
int virStoragePoolDelete (virStoragePoolPtr pool,
unsigned int flags)
Delete the underlying pool resources. This is a non-recoverable operation. The virStoragePoolPtr object itself is not free'd.
| pool: | pointer to storage pool |
| flags: | flags for obliteration process |
| Returns: | 0 on success, or -1 if it could not be obliterate |
int virStoragePoolDestroy (virStoragePoolPtr pool)
Destroy an active storage pool. This will deactivate the pool on the host, but keep any persistent config associated with it. If it has a persistent config it can later be restarted with virStoragePoolCreate(). This does not free the associated virStoragePoolPtr object.
| pool: | pointer to storage pool |
| Returns: | 0 on success, or -1 if it could not be destroyed |
int virStoragePoolFree (virStoragePoolPtr pool)
Free a storage pool object, releasing all memory associated with it. Does not change the state of the pool on the host.
| pool: | pointer to storage pool |
| Returns: | 0 on success, or -1 if it could not be free'd. |
int virStoragePoolGetAutostart (virStoragePoolPtr pool,
int * autostart)
Fetches the value of the autostart flag, which determines whether the pool is automatically started at boot time
| pool: | pointer to storage pool |
| autostart: | location in which to store autostart flag |
| Returns: | 0 on success, -1 on failure |
virConnectPtr virStoragePoolGetConnect (virStoragePoolPtr pool)
Provides the connection pointer associated with a storage pool. The reference counter on the connection is not increased by this call. WARNING: When writing libvirt bindings in other languages, do not use this function. Instead, store the connection and the pool object together.
| pool: | pointer to a pool |
| Returns: | the virConnectPtr or NULL in case of failure. |
int virStoragePoolGetInfo (virStoragePoolPtr pool,
virStoragePoolInfoPtr info)
Get volatile information about the storage pool such as free space / usage summary
| pool: | pointer to storage pool |
| info: | pointer at which to store info |
| Returns: | 0 on success, or -1 on failure. |
const char * virStoragePoolGetName (virStoragePoolPtr pool)
Fetch the locally unique name of the storage pool
| pool: | pointer to storage pool |
| Returns: | the name of the pool, or NULL on error |
int virStoragePoolGetUUID (virStoragePoolPtr pool,
unsigned char * uuid)
Fetch the globally unique ID of the storage pool
| pool: | pointer to storage pool |
| uuid: | buffer of VIR_UUID_BUFLEN bytes in size |
| Returns: | 0 on success, or -1 on error; |
int virStoragePoolGetUUIDString (virStoragePoolPtr pool,
char * buf)
Fetch the globally unique ID of the storage pool as a string
| pool: | pointer to storage pool |
| buf: | buffer of VIR_UUID_STRING_BUFLEN bytes in size |
| Returns: | 0 on success, or -1 on error; |
char * virStoragePoolGetXMLDesc (virStoragePoolPtr pool,
unsigned int flags)
Fetch an XML document describing all aspects of the storage pool. This is suitable for later feeding back into the virStoragePoolCreateXML method.
| pool: | pointer to storage pool |
| flags: | flags for XML format options (set of virDomainXMLFlags) |
| Returns: | a XML document, or NULL on error |
int virStoragePoolListVolumes (virStoragePoolPtr pool,
char ** const names,
int maxnames)
Fetch list of storage volume names, limiting to at most maxnames.
| pool: | pointer to storage pool |
| names: | array in which to storage volume names |
| maxnames: | size of names array |
| Returns: | the number of names fetched, or -1 on error |
virStoragePoolPtr virStoragePoolLookupByName (virConnectPtr conn,
const char * name)
Fetch a storage pool based on its unique name
| conn: | pointer to hypervisor connection |
| name: | name of pool to fetch |
| Returns: | a virStoragePoolPtr object, or NULL if no matching pool is found |
virStoragePoolPtr virStoragePoolLookupByUUID (virConnectPtr conn,
const unsigned char * uuid)
Fetch a storage pool based on its globally unique id
| conn: | pointer to hypervisor connection |
| uuid: | globally unique id of pool to fetch |
| Returns: | a virStoragePoolPtr object, or NULL if no matching pool is found |
virStoragePoolPtr virStoragePoolLookupByUUIDString (virConnectPtr conn,
const char * uuidstr)
Fetch a storage pool based on its globally unique id
| conn: | pointer to hypervisor connection |
| uuidstr: | globally unique id of pool to fetch |
| Returns: | a virStoragePoolPtr object, or NULL if no matching pool is found |
virStoragePoolPtr virStoragePoolLookupByVolume (virStorageVolPtr vol)
Fetch a storage pool which contains a particular volume
| vol: | pointer to storage volume |
| Returns: | a virStoragePoolPtr object, or NULL if no matching pool is found |
int virStoragePoolNumOfVolumes (virStoragePoolPtr pool)
Fetch the number of storage volumes within a pool
| pool: | pointer to storage pool |
| Returns: | the number of storage pools, or -1 on failure |
int virStoragePoolRef (virStoragePoolPtr pool)
Increment the reference count on the pool. For each additional call to this method, there shall be a corresponding call to virStoragePoolFree to release the reference count, once the caller no longer needs the reference to this object. This method is typically useful for applications where multiple threads are using a connection, and it is required that the connection remain open until all threads have finished using it. ie, each new thread using a pool would increment the reference count.
int virStoragePoolRefresh (virStoragePoolPtr pool,
unsigned int flags)
Request that the pool refresh its list of volumes. This may involve communicating with a remote server, and/or initializing new devices at the OS layer
| pool: | pointer to storage pool |
| flags: | flags to control refresh behaviour (currently unused, use 0) |
| Returns: | 0 if the volume list was refreshed, -1 on failure |
int virStoragePoolSetAutostart (virStoragePoolPtr pool,
int autostart)
Sets the autostart flag
| pool: | pointer to storage pool |
| autostart: | new flag setting |
| Returns: | 0 on success, -1 on failure |
int virStoragePoolUndefine (virStoragePoolPtr pool)
Undefine an inactive storage pool
| pool: | pointer to storage pool |
| Returns: | a virStoragePoolPtr object, or NULL if creation failed |
virStorageVolPtr virStorageVolCreateXML (virStoragePoolPtr pool,
const char * xmldesc,
unsigned int flags)
Create a storage volume within a pool based on an XML description. Not all pools support creation of volumes
| pool: | pointer to storage pool |
| xmldesc: | description of volume to create |
| flags: | flags for creation (unused, pass 0) |
| Returns: | the storage volume, or NULL on error |
int virStorageVolDelete (virStorageVolPtr vol,
unsigned int flags)
Delete the storage volume from the pool
| vol: | pointer to storage volume |
| flags: | future flags, use 0 for now |
| Returns: | 0 on success, or -1 on error |
int virStorageVolFree (virStorageVolPtr vol)
Release the storage volume handle. The underlying storage volume continues to exist.
| vol: | pointer to storage volume |
| Returns: | 0 on success, or -1 on error |
virConnectPtr virStorageVolGetConnect (virStorageVolPtr vol)
Provides the connection pointer associated with a storage volume. The reference counter on the connection is not increased by this call. WARNING: When writing libvirt bindings in other languages, do not use this function. Instead, store the connection and the volume object together.
| vol: | pointer to a pool |
| Returns: | the virConnectPtr or NULL in case of failure. |
int virStorageVolGetInfo (virStorageVolPtr vol,
virStorageVolInfoPtr info)
Fetches volatile information about the storage volume such as its current allocation
| vol: | pointer to storage volume |
| info: | pointer at which to store info |
| Returns: | 0 on success, or -1 on failure |
const char * virStorageVolGetKey (virStorageVolPtr vol)
Fetch the storage volume key. This is globally unique, so the same volume will have the same key no matter what host it is accessed from
| vol: | pointer to storage volume |
| Returns: | the volume key, or NULL on error |
const char * virStorageVolGetName (virStorageVolPtr vol)
Fetch the storage volume name. This is unique within the scope of a pool
| vol: | pointer to storage volume |
| Returns: | the volume name, or NULL on error |
char * virStorageVolGetPath (virStorageVolPtr vol)
Fetch the storage volume path. Depending on the pool configuration this is either persistent across hosts, or dynamically assigned at pool startup. Consult pool documentation for information on getting the persistent naming
| vol: | pointer to storage volume |
| Returns: | the storage volume path, or NULL on error |
char * virStorageVolGetXMLDesc (virStorageVolPtr vol,
unsigned int flags)
Fetch an XML document describing all aspects of the storage volume
| vol: | pointer to storage volume |
| flags: | flags for XML generation (unused, pass 0) |
| Returns: | the XML document, or NULL on error |
virStorageVolPtr virStorageVolLookupByKey (virConnectPtr conn,
const char * key)
Fetch a pointer to a storage volume based on its globally unique key
| conn: | pointer to hypervisor connection |
| key: | globally unique key |
| Returns: | a storage volume, or NULL if not found / error |
virStorageVolPtr virStorageVolLookupByName (virStoragePoolPtr pool,
const char * name)
Fetch a pointer to a storage volume based on its name within a pool
| pool: | pointer to storage pool |
| name: | name of storage volume |
| Returns: | a storage volume, or NULL if not found / error |
virStorageVolPtr virStorageVolLookupByPath (virConnectPtr conn,
const char * path)
Fetch a pointer to a storage volume based on its locally (host) unique path
| conn: | pointer to hypervisor connection |
| path: | locally unique path |
| Returns: | a storage volume, or NULL if not found / error |
int virStorageVolRef (virStorageVolPtr vol)
Increment the reference count on the vol. For each additional call to this method, there shall be a corresponding call to virStorageVolFree to release the reference count, once the caller no longer needs the reference to this object. This method is typically useful for applications where multiple threads are using a connection, and it is required that the connection remain open until all threads have finished using it. ie, each new thread using a vol would increment the reference count.
