Module libvirt from libvirt

Provides the interfaces of the libvirt library to handle virtualized domains

Table of Contents

Macros

#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_SECURITY_DOI_BUFLEN
#define VIR_SECURITY_LABEL_BUFLEN
#define VIR_SECURITY_MODEL_BUFLEN
#define VIR_UNUSE_CPU
#define VIR_USE_CPU
#define VIR_UUID_BUFLEN
#define VIR_UUID_STRING_BUFLEN

Types

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 _virSecurityLabel virSecurityLabel
typedef virSecurityLabel * virSecurityLabelPtr
typedef struct _virSecurityModel virSecurityModel
typedef virSecurityModel * virSecurityModelPtr
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

Functions

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 virDomainGetSecurityLabel (virDomainPtr domain,
virSecurityLabelPtr seclabel) 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) virNodeDevicePtr virNodeDeviceCreateXML (virConnectPtr conn,
const char * xmlDesc,
unsigned int flags) int virNodeDeviceDestroy (virNodeDevicePtr dev) int virNodeDeviceDettach (virNodeDevicePtr dev) 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 virNodeDeviceReAttach (virNodeDevicePtr dev) int virNodeDeviceRef (virNodeDevicePtr dev) int virNodeDeviceReset (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 virNodeGetSecurityModel (virConnectPtr conn,
virSecurityModelPtr secmodel) 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

Macros

LIBVIR_VERSION_NUMBER

#define LIBVIR_VERSION_NUMBER

Macro providing the version of the library as version * 1,000,000 + minor * 1000 + micro

VIR_COPY_CPUMAP

#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.

VIR_CPU_MAPLEN

#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.

VIR_CPU_USABLE

#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.

VIR_DOMAIN_SCHED_FIELD_LENGTH

#define VIR_DOMAIN_SCHED_FIELD_LENGTH

Macro providing the field length of virSchedParameter

VIR_GET_CPUMAP

#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.

VIR_NODEINFO_MAXCPUS

#define VIR_NODEINFO_MAXCPUS

This macro is to calculate the total number of CPUs supported but not necessary active in the host.

VIR_SECURITY_DOI_BUFLEN

#define VIR_SECURITY_DOI_BUFLEN

Macro providing the maximum length of the virSecurityModel doi string.

VIR_SECURITY_LABEL_BUFLEN

#define VIR_SECURITY_LABEL_BUFLEN

Macro providing the maximum length of the virSecurityLabel label string. Note that this value is based on that used by Labeled NFS.

VIR_SECURITY_MODEL_BUFLEN

#define VIR_SECURITY_MODEL_BUFLEN

Macro providing the maximum length of the virSecurityModel model string.

VIR_UNUSE_CPU

#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.

VIR_USE_CPU

#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.

VIR_UUID_BUFLEN

#define VIR_UUID_BUFLEN

This macro provides the length of the buffer required for virDomainGetUUID()

VIR_UUID_STRING_BUFLEN

#define VIR_UUID_STRING_BUFLEN

This macro provides the length of the buffer required for virDomainGetUUIDString()

Types

virConnect

struct virConnect{
The content of this structure is not made public by the API
}

virConnectAuth

struct virConnectAuth{
int *credtype : List of supported virConnectCredentialType values
unsigned intncredtype
virConnectAuthCallbackPtrcb : Callback used to collect credentials
void *cbdata
}

virConnectCredential

struct virConnectCredential{
inttype : 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 intresultlen : Length of the result
}

virConnectCredentialType

enum virConnectCredentialType {
VIR_CRED_USERNAME = 1 : Identity to act as
VIR_CRED_AUTHNAME = 2 : Identify to authorize as
VIR_CRED_LANGUAGE = 3 : RFC 1766 languages, comma separated
VIR_CRED_CNONCE = 4 : client supplies a nonce
VIR_CRED_PASSPHRASE = 5 : Passphrase secret
VIR_CRED_ECHOPROMPT = 6 : Challenge response
VIR_CRED_NOECHOPROMPT = 7 : Challenge response
VIR_CRED_REALM = 8 : Authentication realm
VIR_CRED_EXTERNAL = 9 : Externally managed credential More may be added - expect the unexpected
}

virConnectFlags

enum virConnectFlags {
VIR_CONNECT_RO = 1 : A readonly connection
}

virDomain

struct virDomain{
The content of this structure is not made public by the API
}

virDomainBlockStatsStruct

struct virDomainBlockStatsStruct{
long longrd_req : number of read requests
long longrd_bytes : number of read bytes
long longwr_req : number of write requests
long longwr_bytes : number of written bytes
long longerrs : In Xen this returns the mysterious 'oo_req'.
}

virDomainCreateFlags

enum virDomainCreateFlags {
VIR_DOMAIN_NONE = 0
}

virDomainEventDefinedDetailType

enum virDomainEventDefinedDetailType {
VIR_DOMAIN_EVENT_DEFINED_ADDED = 0 : Newly created config file
VIR_DOMAIN_EVENT_DEFINED_UPDATED = 1 : Changed config file
}

virDomainEventResumedDetailType

enum virDomainEventResumedDetailType {
VIR_DOMAIN_EVENT_RESUMED_UNPAUSED = 0 : Normal resume due to admin unpause
VIR_DOMAIN_EVENT_RESUMED_MIGRATED = 1 : Resumed for completion of migration
}

virDomainEventStartedDetailType

enum virDomainEventStartedDetailType {
VIR_DOMAIN_EVENT_STARTED_BOOTED = 0 : Normal startup from boot
VIR_DOMAIN_EVENT_STARTED_MIGRATED = 1 : Incoming migration from another host
VIR_DOMAIN_EVENT_STARTED_RESTORED = 2 : Restored from a state file
}

virDomainEventStoppedDetailType

enum virDomainEventStoppedDetailType {
VIR_DOMAIN_EVENT_STOPPED_SHUTDOWN = 0 : Normal shutdown
VIR_DOMAIN_EVENT_STOPPED_DESTROYED = 1 : Forced poweroff from host
VIR_DOMAIN_EVENT_STOPPED_CRASHED = 2 : Guest crashed
VIR_DOMAIN_EVENT_STOPPED_MIGRATED = 3 : Migrated off to another host
VIR_DOMAIN_EVENT_STOPPED_SAVED = 4 : Saved to a state file
VIR_DOMAIN_EVENT_STOPPED_FAILED = 5 : Host emulator/mgmt failed
}

virDomainEventSuspendedDetailType

enum virDomainEventSuspendedDetailType {
VIR_DOMAIN_EVENT_SUSPENDED_PAUSED = 0 : Normal suspend due to admin pause
VIR_DOMAIN_EVENT_SUSPENDED_MIGRATED = 1 : Suspended for offline migration
}

virDomainEventType

virDomainEventUndefinedDetailType

enum virDomainEventUndefinedDetailType {
VIR_DOMAIN_EVENT_UNDEFINED_REMOVED = 0 : Deleted the config file
}

virDomainInfo

struct virDomainInfo{
unsigned charstate : the running state, one of virDomainState
unsigned longmaxMem : the maximum memory in KBytes allowed
unsigned longmemory : the memory in KBytes used by the domain
unsigned shortnrVirtCpu : the number of virtual CPUs for the domain
unsigned long longcpuTime : the CPU time used in nanoseconds
}

virDomainInterfaceStatsStruct

struct virDomainInterfaceStatsStruct{
long longrx_bytes
long longrx_packets
long longrx_errs
long longrx_drop
long longtx_bytes
long longtx_packets
long longtx_errs
long longtx_drop
}

virDomainMemoryFlags

enum virDomainMemoryFlags {
VIR_MEMORY_VIRTUAL = 1 : addresses are virtual addresses
}

virDomainMigrateFlags

enum virDomainMigrateFlags {
VIR_MIGRATE_LIVE = 1 : live migration
}

virDomainState

enum virDomainState {
VIR_DOMAIN_NOSTATE = 0 : no state
VIR_DOMAIN_RUNNING = 1 : the domain is running
VIR_DOMAIN_BLOCKED = 2 : the domain is blocked on resource
VIR_DOMAIN_PAUSED = 3 : the domain is paused by user
VIR_DOMAIN_SHUTDOWN = 4 : the domain is being shut down
VIR_DOMAIN_SHUTOFF = 5 : the domain is shut off
VIR_DOMAIN_CRASHED = 6 : the domain is crashed
}

virDomainXMLFlags

enum virDomainXMLFlags {
VIR_DOMAIN_XML_SECURE = 1 : dump security sensitive information too
VIR_DOMAIN_XML_INACTIVE = 2 : dump inactive domain information
}

virEventHandleType

virNetwork

struct virNetwork{
The content of this structure is not made public by the API
}

virNodeDevice

struct virNodeDevice{
The content of this structure is not made public by the API
}

virNodeInfo

struct virNodeInfo{
charmodel[32]model : string indicating the CPU model
unsigned longmemory : memory size in kilobytes
unsigned intcpus : the number of active CPUs
unsigned intmhz : expected CPU frequency
unsigned intnodes : the number of NUMA cell, 1 for uniform mem access
unsigned intsockets : number of CPU socket per node
unsigned intcores : number of core per socket
unsigned intthreads : number of threads per core
}

virSchedParameter

struct virSchedParameter{
charfield[VIR_DOMAIN_SCHED_FIELD_LENGTH]field : parameter name
inttype : parameter type
}

virSchedParameterType

enum virSchedParameterType {
VIR_DOMAIN_SCHED_FIELD_INT = 1 : integer case
VIR_DOMAIN_SCHED_FIELD_UINT = 2 : unsigned integer case
VIR_DOMAIN_SCHED_FIELD_LLONG = 3 : long long case
VIR_DOMAIN_SCHED_FIELD_ULLONG = 4 : unsigned long long case
VIR_DOMAIN_SCHED_FIELD_DOUBLE = 5 : double case
VIR_DOMAIN_SCHED_FIELD_BOOLEAN = 6 : boolean(character) case
}

virSecurityLabel

struct virSecurityLabel{
The content of this structure is not made public by the API
}

virSecurityModel

struct virSecurityModel{
The content of this structure is not made public by the API
}

virStoragePool

struct virStoragePool{
The content of this structure is not made public by the API
}

virStoragePoolBuildFlags

enum virStoragePoolBuildFlags {
VIR_STORAGE_POOL_BUILD_NEW = 0 : Regular build from scratch
VIR_STORAGE_POOL_BUILD_REPAIR = 1 : Repair / reinitialize
VIR_STORAGE_POOL_BUILD_RESIZE = 2 : Extend existing pool
}

virStoragePoolDeleteFlags

enum virStoragePoolDeleteFlags {
VIR_STORAGE_POOL_DELETE_NORMAL = 0 : Delete metadata only (fast)
VIR_STORAGE_POOL_DELETE_ZEROED = 1 : Clear all data to zeros (slow)
}

virStoragePoolInfo

struct virStoragePoolInfo{
intstate : virStoragePoolState flags
unsigned long longcapacity : Logical size bytes
unsigned long longallocation : Current allocation bytes
unsigned long longavailable : Remaining free space bytes
}

virStoragePoolState

enum virStoragePoolState {
VIR_STORAGE_POOL_INACTIVE = 0 : Not running
VIR_STORAGE_POOL_BUILDING = 1 : Initializing pool, not available
VIR_STORAGE_POOL_RUNNING = 2 : Running normally
VIR_STORAGE_POOL_DEGRADED = 3 : Running degraded
}

virStorageVol

struct virStorageVol{
The content of this structure is not made public by the API
}

virStorageVolDeleteFlags

enum virStorageVolDeleteFlags {
VIR_STORAGE_VOL_DELETE_NORMAL = 0 : Delete metadata only (fast)
VIR_STORAGE_VOL_DELETE_ZEROED = 1 : Clear all data to zeros (slow)
}

virStorageVolInfo

struct virStorageVolInfo{
inttype : virStorageVolType flags
unsigned long longcapacity : Logical size bytes
unsigned long longallocation : Current allocation bytes
}

virStorageVolType

enum virStorageVolType {
VIR_STORAGE_VOL_FILE = 0 : Regular file based volumes
VIR_STORAGE_VOL_BLOCK = 1 : Block based volumes
}

virVcpuInfo

struct virVcpuInfo{
unsigned intnumber : virtual CPU number
intstate : value from virVcpuState
unsigned long longcpuTime : CPU time used, in nanoseconds
intcpu : real CPU number, or -1 if offline
}

virVcpuState

enum virVcpuState {
VIR_VCPU_OFFLINE = 0 : the virtual CPU is offline
VIR_VCPU_RUNNING = 1 : the virtual CPU is running
VIR_VCPU_BLOCKED = 2 : the virtual CPU is blocked on resource
}

Functions

virConnectAuthCallbackPtr

typedef int	(*virConnectAuthCallbackPtr)	(virConnectCredentialPtr cred, 
unsigned int ncred,
void * cbdata)

cred:
ncred:
cbdata:
Returns:

virConnectClose

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.

virConnectDomainEventCallback

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:

virConnectDomainEventDeregister

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

virConnectDomainEventRegister

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

virConnectFindStoragePoolSources

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.

virConnectGetCapabilities

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.

virConnectGetHostname

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.

virConnectGetMaxVcpus

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.

virConnectGetType

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

virConnectGetURI

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.

virConnectGetVersion

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

virConnectListDefinedDomains

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

virConnectListDefinedNetworks

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

virConnectListDefinedStoragePools

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

virConnectListDomains

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

virConnectListNetworks

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

virConnectListStoragePools

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

virConnectNumOfDefinedDomains

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

virConnectNumOfDefinedNetworks

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

virConnectNumOfDefinedStoragePools

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

virConnectNumOfDomains

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

virConnectNumOfNetworks

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

virConnectNumOfStoragePools

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

virConnectOpen

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

virConnectOpenAuth

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

virConnectOpenReadOnly

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

virConnectRef

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:0 in case of success, -1 in case of failure

virDomainAttachDevice

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.

virDomainBlockPeek

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

virDomainBlockStats

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.

virDomainCoreDump

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.

virDomainCreate

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

virDomainCreateLinux

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

virDomainCreateXML

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

virDomainDefineXML

virDomainPtr	virDomainDefineXML	(virConnectPtr conn, 
const char * xml)

Define a domain, but does not start it. This definition is persistent, until explicitly undefined with virDomainUndefine(). A previous definition for this domain would be overriden if it already exists.

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

virDomainDestroy

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.

virDomainDetachDevice

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.

virDomainFree

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.

virDomainGetAutostart

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

virDomainGetConnect

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.

virDomainGetID

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

virDomainGetInfo

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.

virDomainGetMaxMemory

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.

virDomainGetMaxVcpus

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.

virDomainGetName

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.

virDomainGetOSType

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.

virDomainGetSchedulerParameters

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.

virDomainGetSchedulerType

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.

virDomainGetSecurityLabel

int	virDomainGetSecurityLabel	(virDomainPtr domain, 
virSecurityLabelPtr seclabel)

Extract security label of an active domain.

domain:a domain object
seclabel:pointer to a virSecurityLabel structure
Returns:0 in case of success, -1 in case of failure, and -2 if the operation is not supported (caller decides if that's an error).

virDomainGetUUID

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

virDomainGetUUIDString

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

virDomainGetVcpus

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.

virDomainGetXMLDesc

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.

virDomainInterfaceStats

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.

virDomainLookupByID

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.

virDomainLookupByName

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.

virDomainLookupByUUID

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.

virDomainLookupByUUIDString

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.

virDomainMemoryPeek

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

virDomainMigrate

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).

virDomainPinVcpu

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.

virDomainReboot

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.

virDomainRef

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.

domain:the domain to hold a reference on
Returns:0 in case of success and -1 in case of failure.

virDomainRestore

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.

virDomainResume

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.

virDomainSave

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.

virDomainSetAutostart

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

virDomainSetMaxMemory

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.

virDomainSetMemory

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.

virDomainSetSchedulerParameters

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.

virDomainSetVcpus

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.

virDomainShutdown

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.

virDomainSuspend

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.

virDomainUndefine

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

virEventAddHandleFunc

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

virEventAddTimeoutFunc

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

virEventHandleCallback

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

virEventRegisterImpl

void	virEventRegisterImpl		(virEventAddHandleFunc addHandle, 
virEventUpdateHandleFunc updateHandle,
virEventRemoveHandleFunc removeHandle,
virEventAddTimeoutFunc addTimeout,
virEventUpdateTimeoutFunc updateTimeout,
virEventRemoveTimeoutFunc removeTimeout)

addHandle:
updateHandle:
removeHandle:
addTimeout:
updateTimeout:
removeTimeout:

virEventRemoveHandleFunc

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:

virEventRemoveTimeoutFunc

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

virEventTimeoutCallback

typedef void	(*virEventTimeoutCallback	)	(int timer, 
void * opaque)

callback for receiving timer events

timer:timer id emitting the event
opaque:user data registered with handle

virEventUpdateHandleFunc

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

virEventUpdateTimeoutFunc

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

virFreeCallback

typedef void	(*virFreeCallback		)	(void * opaque)

opaque:

virGetVersion

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.

virInitialize

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

virNetworkCreate

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

virNetworkCreateXML

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

virNetworkDefineXML

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

virNetworkDestroy

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.

virNetworkFree

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.

virNetworkGetAutostart

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

virNetworkGetBridgeName

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.

virNetworkGetConnect

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.

virNetworkGetName

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.

virNetworkGetUUID

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

virNetworkGetUUIDString

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

virNetworkGetXMLDesc

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.

virNetworkLookupByName

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.

virNetworkLookupByUUID

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.

virNetworkLookupByUUIDString

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.

virNetworkRef

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.

network:the network to hold a reference on
Returns:0 in case of success, -1 in case of failure.

virNetworkSetAutostart

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

virNetworkUndefine

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

virNodeDeviceCreateXML

virNodeDevicePtr	virNodeDeviceCreateXML	(virConnectPtr conn, 
const char * xmlDesc,
unsigned int flags)

Create a new device on the VM host machine, for example, virtual HBAs created using vport_create.

conn:pointer to the hypervisor connection
xmlDesc:string containing an XML description of the device to be created
flags:callers should always pass 0
Returns:a node device object if successful, NULL in case of failure

virNodeDeviceDestroy

int	virNodeDeviceDestroy		(virNodeDevicePtr dev)

Destroy the device object. The virtual device is removed from the host operating system. This function may require privileged access

dev:a device object
Returns:0 in case of success and -1 in case of failure.

virNodeDeviceDettach

int	virNodeDeviceDettach		(virNodeDevicePtr dev)

Dettach the node device from the node itself so that it may be assigned to a guest domain. Depending on the hypervisor, this may involve operations such as unbinding any device drivers from the device, binding the device to a dummy device driver and resetting the device. If the device is currently in use by the node, this method may fail. Once the device is not assigned to any guest, it may be re-attached to the node using the virNodeDeviceReattach() method.

dev:pointer to the node device
Returns:0 in case of success, -1 in case of failure.

virNodeDeviceFree

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.

virNodeDeviceGetName

const char *	virNodeDeviceGetName	(virNodeDevicePtr dev)

Just return the device name

dev:the device
Returns:the device name or NULL in case of error

virNodeDeviceGetParent

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.

virNodeDeviceGetXMLDesc

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

virNodeDeviceListCaps

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.

virNodeDeviceLookupByName

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.

virNodeDeviceNumOfCaps

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.

virNodeDeviceReAttach

int	virNodeDeviceReAttach		(virNodeDevicePtr dev)

Re-attach a previously dettached node device to the node so that it may be used by the node again. Depending on the hypervisor, this may involve operations such as resetting the device, unbinding it from a dummy device driver and binding it to its appropriate driver. If the device is currently in use by a guest, this method may fail.

dev:pointer to the node device
Returns:0 in case of success, -1 in case of failure.

virNodeDeviceRef

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.

dev:the dev to hold a reference on
Returns:0 in case of success, -1 in case of failure.

virNodeDeviceReset

int	virNodeDeviceReset		(virNodeDevicePtr dev)

Reset a previously dettached node device to the node before or after assigning it to a guest. The exact reset semantics depends on the hypervisor and device type but, for example, KVM will attempt to reset PCI devices with a Function Level Reset, Secondary Bus Reset or a Power Management D-State reset. If the reset will affect other devices which are currently in use, this function may fail.

dev:pointer to the node device
Returns:0 in case of success, -1 in case of failure.

virNodeGetCellsFreeMemory

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.

virNodeGetFreeMemory

unsigned long long	virNodeGetFreeMemory	(virConnectPtr conn)

provides the free memory available on the Node Note: most libvirt APIs provide memory sizes in kilobytes, but in this function the returned value is in bytes. Divide by 1024 as necessary.

conn:pointer to the hypervisor connection
Returns:the available free memory in bytes or 0 in case of error

virNodeGetInfo

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.

virNodeGetSecurityModel

int	virNodeGetSecurityModel		(virConnectPtr conn, 
virSecurityModelPtr secmodel)

Extract the security model of a hypervisor.

conn:a connection object
secmodel:pointer to a virSecurityModel structure
Returns:0 in case of success, -1 in case of failure, and -2 if the operation is not supported (caller decides if that's an error).

virNodeListDevices

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

virNodeNumOfDevices

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

virStoragePoolBuild

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

virStoragePoolCreate

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

virStoragePoolCreateXML

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

virStoragePoolDefineXML

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

virStoragePoolDelete

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

virStoragePoolDestroy

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

virStoragePoolFree

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.

virStoragePoolGetAutostart

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

virStoragePoolGetConnect

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.

virStoragePoolGetInfo

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.

virStoragePoolGetName

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

virStoragePoolGetUUID

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;

virStoragePoolGetUUIDString

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;

virStoragePoolGetXMLDesc

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

virStoragePoolListVolumes

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

virStoragePoolLookupByName

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

virStoragePoolLookupByUUID

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

virStoragePoolLookupByUUIDString

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

virStoragePoolLookupByVolume

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

virStoragePoolNumOfVolumes

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

virStoragePoolRef

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.

pool:the pool to hold a reference on
Returns:0 in case of success, -1 in case of failure.

virStoragePoolRefresh

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

virStoragePoolSetAutostart

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

virStoragePoolUndefine

int	virStoragePoolUndefine		(virStoragePoolPtr pool)

Undefine an inactive storage pool

pool:pointer to storage pool
Returns:a virStoragePoolPtr object, or NULL if creation failed

virStorageVolCreateXML

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

virStorageVolDelete

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

virStorageVolFree

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

virStorageVolGetConnect

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.

virStorageVolGetInfo

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

virStorageVolGetKey

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

virStorageVolGetName

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

virStorageVolGetPath

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

virStorageVolGetXMLDesc

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

virStorageVolLookupByKey

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

virStorageVolLookupByName

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

virStorageVolLookupByPath

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

virStorageVolRef

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.

vol:the vol to hold a reference on
Returns:0 in case of success, -1 in case of failure.