Macro LIBVIR_VERSION_NUMBER

#define LIBVIR_VERSION_NUMBER;

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

Macro VIR_COPY_CPUMAP

#define VIR_COPY_CPUMAP(cpumaps, maplen, vcpu, 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.

Macro VIR_CPU_MAPLEN

#define VIR_CPU_MAPLEN(cpu);

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.

Macro VIR_CPU_USABLE

#define VIR_CPU_USABLE(cpumaps, maplen, vcpu, cpu);

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.

Macro VIR_DOMAIN_SCHED_FIELD_LENGTH

#define VIR_DOMAIN_SCHED_FIELD_LENGTH;

Macro providing the field length of virSchedParameter

Macro VIR_GET_CPUMAP

#define VIR_GET_CPUMAP(cpumaps, maplen, vcpu);

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.

Macro VIR_NODEINFO_MAXCPUS

#define VIR_NODEINFO_MAXCPUS(nodeinfo);

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

Macro VIR_UNUSE_CPU

#define VIR_UNUSE_CPU(cpumap, 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.

Macro VIR_USE_CPU

#define VIR_USE_CPU(cpumap, 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.

Macro VIR_UUID_BUFLEN

#define VIR_UUID_BUFLEN;

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

Macro VIR_UUID_STRING_BUFLEN

#define VIR_UUID_STRING_BUFLEN;

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

Structure virConnect

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

Structure virConnectAuth

struct _virConnectAuth {
    int *	credtype	: List of supported virConnectCredentialType values
    unsigned int	ncredtype
    virConnectAuthCallbackPtr	cb	: Callback used to collect credentials
    void *	cbdata
} virConnectAuth;

Typedef virConnectAuthPtr

virConnectAuth * virConnectAuthPtr;

Structure virConnectCredential

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
} virConnectCredential;

Typedef virConnectCredentialPtr

virConnectCredential * virConnectCredentialPtr;

Enum 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 */
};

Enum virConnectFlags

enum virConnectFlags {
    VIR_CONNECT_RO = 1 /*  A readonly connection */
};

Typedef virConnectPtr

virConnect * virConnectPtr;

a virConnectPtr is pointer to a virConnect private structure, this is the type used to reference a connection to the Xen Hypervisor in the API.

Structure virDomain

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

Typedef virDomainBlockStatsPtr

virDomainBlockStatsStruct * virDomainBlockStatsPtr;

A pointer to a virDomainBlockStats structure

Structure virDomainBlockStatsStruct

struct _virDomainBlockStats {
    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'.
} virDomainBlockStatsStruct;

Enum virDomainCreateFlags

enum virDomainCreateFlags {
    VIR_DOMAIN_NONE = 0
};

Structure virDomainInfo

struct _virDomainInfo {
    unsigned char	state	: the running state, one of virDomainFlags
    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
} virDomainInfo;

Typedef virDomainInfoPtr

virDomainInfo * virDomainInfoPtr;

a virDomainInfoPtr is a pointer to a virDomainInfo structure.

Typedef virDomainInterfaceStatsPtr

virDomainInterfaceStatsStruct * virDomainInterfaceStatsPtr;

A pointer to a virDomainInterfaceStats structure

Structure virDomainInterfaceStatsStruct

struct _virDomainInterfaceStats {
    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
} virDomainInterfaceStatsStruct;

Enum virDomainMigrateFlags

enum virDomainMigrateFlags {
    VIR_MIGRATE_LIVE = 1 /*  live migration */
};

Typedef virDomainPtr

virDomain * virDomainPtr;

a virDomainPtr is pointer to a virDomain private structure, this is the type used to reference a Xen domain in the API.

Enum 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 */
};

Enum virDomainXMLFlags

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

Structure virNetwork

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

Typedef virNetworkPtr

virNetwork * virNetworkPtr;

a virNetworkPtr is pointer to a virNetwork private structure, this is the type used to reference a virtual network in the API.

Structure virNodeInfo

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
} virNodeInfo;

Typedef virNodeInfoPtr

virNodeInfo * virNodeInfoPtr;

a virNodeInfoPtr is a pointer to a virNodeInfo structure.

Structure virSchedParameter

struct _virSchedParameter {
    charfield[VIR_DOMAIN_SCHED_FIELD_LENGTH]	field	: parameter name
    int	type	: parameter type
} virSchedParameter;

Typedef virSchedParameterPtr

virSchedParameter * virSchedParameterPtr;

a virSchedParameterPtr is a pointer to a virSchedParameter structure.

Enum 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 */
};

Structure virStoragePool

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

Enum 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 */
};

Enum 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) */
};

Structure virStoragePoolInfo

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
} virStoragePoolInfo;

Typedef virStoragePoolInfoPtr

virStoragePoolInfo * virStoragePoolInfoPtr;

Typedef virStoragePoolPtr

virStoragePool * virStoragePoolPtr;

a virStoragePoolPtr is pointer to a virStoragePool private structure, this is the type used to reference a storage pool in the API.

Enum 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 */
};

Structure virStorageVol

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

Enum 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) */
};

Structure virStorageVolInfo

struct _virStorageVolInfo {
    int	type	: virStorageVolType flags
    unsigned long long	capacity	: Logical size bytes
    unsigned long long	allocation	: Current allocation bytes
} virStorageVolInfo;

Typedef virStorageVolInfoPtr

virStorageVolInfo * virStorageVolInfoPtr;

Typedef virStorageVolPtr

virStorageVol * virStorageVolPtr;

a virStorageVolPtr is pointer to a virStorageVol private structure, this is the type used to reference a storage volume in the API.

Enum virStorageVolType

enum virStorageVolType {
    VIR_STORAGE_VOL_FILE = 0 /* Regular file based volumes */
    VIR_STORAGE_VOL_BLOCK = 1 /*  Block based volumes */
};

Structure virVcpuInfo

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
} virVcpuInfo;

Typedef virVcpuInfoPtr

virVcpuInfo * virVcpuInfoPtr;

Enum 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 */
};

Function type virConnectAuthCallbackPtr

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

Variable virConnectAuthPtrDefault

virConnectAuthPtr virConnectAuthPtrDefault;

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.

virConnectGetCapabilities ()

char *	virConnectGetCapabilities	(virConnectPtr conn)

Provides capabilities of the hypervisor / driver.

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.

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.

virConnectGetType ()

const char *	virConnectGetType	(virConnectPtr conn)

Get the name of the Hypervisor software used.

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.

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.

virConnectListDefinedDomains ()

int	virConnectListDefinedDomains	(virConnectPtr conn, 
					 char ** const names, 
					 int maxnames)

list the defined but inactive domains, stores the pointers to the names in @names

virConnectListDefinedNetworks ()

int	virConnectListDefinedNetworks	(virConnectPtr conn, 
					 char ** const names, 
					 int maxnames)

list the inactive networks, stores the pointers to the names in @names

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.

virConnectListDomains ()

int	virConnectListDomains		(virConnectPtr conn, 
					 int * ids, 
					 int maxids)

Collect the list of active domains, and store their ID in @maxids

virConnectListNetworks ()

int	virConnectListNetworks		(virConnectPtr conn, 
					 char ** const names, 
					 int maxnames)

Collect the list of active networks, and store their names in @names

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.

virConnectNumOfDefinedDomains ()

int	virConnectNumOfDefinedDomains	(virConnectPtr conn)

Provides the number of defined but inactive domains.

virConnectNumOfDefinedNetworks ()

int	virConnectNumOfDefinedNetworks	(virConnectPtr conn)

Provides the number of inactive networks.

virConnectNumOfDefinedStoragePools ()

int	virConnectNumOfDefinedStoragePools	(virConnectPtr conn)

Provides the number of inactive storage pools

virConnectNumOfDomains ()

int	virConnectNumOfDomains		(virConnectPtr conn)

Provides the number of active domains.

virConnectNumOfNetworks ()

int	virConnectNumOfNetworks		(virConnectPtr conn)

Provides the number of active networks.

virConnectNumOfStoragePools ()

int	virConnectNumOfStoragePools	(virConnectPtr conn)

Provides the number of active storage pools

virConnectOpen ()

virConnectPtr	virConnectOpen		(const char * name)

This function should be called first to get a connection to the Hypervisor and xen store

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

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.

virDomainAttachDevice ()

int	virDomainAttachDevice		(virDomainPtr domain, 
					 const char * xml)

Create a virtual device attachment to backend.

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.

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.

virDomainCreate ()

int	virDomainCreate			(virDomainPtr domain)

launch a defined domain. If the call succeed the domain moves from the defined to the running domains pools.

virDomainCreateLinux ()

virDomainPtr	virDomainCreateLinux	(virConnectPtr conn, 
					 const char * xmlDesc, 
					 unsigned int flags)

Launch a new Linux guest domain, based on an XML description similar to the one returned by virDomainGetXMLDesc() This function may requires privileged access to the hypervisor.

virDomainDefineXML ()

virDomainPtr	virDomainDefineXML	(virConnectPtr conn, 
					 const char * xml)

define a domain, but does not start it

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. The data structure is freed and should not be used thereafter if the call does not return an error. This function may requires privileged access

virDomainDetachDevice ()

int	virDomainDetachDevice		(virDomainPtr domain, 
					 const char * xml)

Destroy a virtual device attachment to backend.

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.

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.

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.

virDomainGetID ()

unsigned int	virDomainGetID		(virDomainPtr domain)

Get the hypervisor ID number for the domain

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.

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.

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.

virDomainGetName ()

const char *	virDomainGetName	(virDomainPtr domain)

Get the public name for that domain

virDomainGetOSType ()

char *	virDomainGetOSType		(virDomainPtr domain)

Get the type of domain operation system.

virDomainGetSchedulerParameters ()

int	virDomainGetSchedulerParameters	(virDomainPtr domain, 
					 virSchedParameterPtr params, 
					 int * nparams)

Get the scheduler parameters, the @params array will be filled with the values.

virDomainGetSchedulerType ()

char *	virDomainGetSchedulerType	(virDomainPtr domain, 
					 int * nparams)

Get the scheduler type.

virDomainGetUUID ()

int	virDomainGetUUID		(virDomainPtr domain, 
					 unsigned char * uuid)

Get the UUID for a domain

virDomainGetUUIDString ()

int	virDomainGetUUIDString		(virDomainPtr domain, 
					 char * buf)

Get the UUID for a domain as string. For more information about UUID see RFC4122.

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.

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 virDomainCreateLinux().

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.

virDomainLookupByID ()

virDomainPtr	virDomainLookupByID	(virConnectPtr conn, 
					 int id)

Try to find a domain based on the hypervisor ID number

virDomainLookupByName ()

virDomainPtr	virDomainLookupByName	(virConnectPtr conn, 
					 const char * name)

Try to lookup a domain on the given hypervisor based on its name.

virDomainLookupByUUID ()

virDomainPtr	virDomainLookupByUUID	(virConnectPtr conn, 
					 const unsigned char * uuid)

Try to lookup a domain on the given hypervisor based on its UUID.

virDomainLookupByUUIDString ()

virDomainPtr	virDomainLookupByUUIDString	(virConnectPtr conn, 
						 const char * uuidstr)

Try to lookup a domain on the given hypervisor based on its UUID.

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.

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.

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.

virDomainRestore ()

int	virDomainRestore		(virConnectPtr conn, 
					 const char * from)

This method will restore a domain saved to disk by virDomainSave().

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

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.

virDomainSetAutostart ()

int	virDomainSetAutostart		(virDomainPtr domain, 
					 int autostart)

Configure the domain to be automatically started when the host machine boots.

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.

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.

virDomainSetSchedulerParameters ()

int	virDomainSetSchedulerParameters	(virDomainPtr domain, 
					 virSchedParameterPtr params, 
					 int nparams)

Change the scheduler parameters

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.

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 ?

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.

virDomainUndefine ()

int	virDomainUndefine		(virDomainPtr domain)

undefine a domain but does not stop it if it is running

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.

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.

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.

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()

virNetworkDefineXML ()

virNetworkPtr	virNetworkDefineXML	(virConnectPtr conn, 
					 const char * xml)

Define a network, but does not create it

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. The data structure is freed and should not be used thereafter if the call does not return an error. This function may requires privileged access

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.

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.

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.

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.

virNetworkGetName ()

const char *	virNetworkGetName	(virNetworkPtr network)

Get the public name for that network

virNetworkGetUUID ()

int	virNetworkGetUUID		(virNetworkPtr network, 
					 unsigned char * uuid)

Get the UUID for a network

virNetworkGetUUIDString ()

int	virNetworkGetUUIDString		(virNetworkPtr network, 
					 char * buf)

Get the UUID for a network as string. For more information about UUID see RFC4122.

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().

virNetworkLookupByName ()

virNetworkPtr	virNetworkLookupByName	(virConnectPtr conn, 
					 const char * name)

Try to lookup a network on the given hypervisor based on its name.

virNetworkLookupByUUID ()

virNetworkPtr	virNetworkLookupByUUID	(virConnectPtr conn, 
					 const unsigned char * uuid)

Try to lookup a network on the given hypervisor based on its UUID.

virNetworkLookupByUUIDString ()

virNetworkPtr	virNetworkLookupByUUIDString	(virConnectPtr conn, 
						 const char * uuidstr)

Try to lookup a network on the given hypervisor based on its UUID.

virNetworkSetAutostart ()

int	virNetworkSetAutostart		(virNetworkPtr network, 
					 int autostart)

Configure the network to be automatically started when the host machine boots.

virNetworkUndefine ()

int	virNetworkUndefine		(virNetworkPtr network)

Undefine a network but does not stop it if it is running

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.

virNodeGetFreeMemory ()

unsigned long long	virNodeGetFreeMemory	(virConnectPtr conn)

provides the free memory available on the Node

virNodeGetInfo ()

int	virNodeGetInfo			(virConnectPtr conn, 
					 virNodeInfoPtr info)

Extract hardware information about the node.

virStoragePoolBuild ()

int	virStoragePoolBuild		(virStoragePoolPtr pool, 
					 unsigned int flags)

Build the underlying storage pool

virStoragePoolCreate ()

int	virStoragePoolCreate		(virStoragePoolPtr pool, 
					 unsigned int flags)

Starts an inactive storage pool

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

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.

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.

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.

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.

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

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.

virStoragePoolGetInfo ()

int	virStoragePoolGetInfo		(virStoragePoolPtr pool, 
					 virStoragePoolInfoPtr info)

Get volatile information about the storage pool such as free space / usage summary

virStoragePoolGetName ()

const char *	virStoragePoolGetName	(virStoragePoolPtr pool)

Fetch the locally unique name of the storage pool

virStoragePoolGetUUID ()

int	virStoragePoolGetUUID		(virStoragePoolPtr pool, 
					 unsigned char * uuid)

Fetch the globally unique ID of the storage pool

virStoragePoolGetUUIDString ()

int	virStoragePoolGetUUIDString	(virStoragePoolPtr pool, 
					 char * buf)

Fetch the globally unique ID of the storage pool as a string

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.

virStoragePoolListVolumes ()

int	virStoragePoolListVolumes	(virStoragePoolPtr pool, 
					 char ** const names, 
					 int maxnames)

Fetch list of storage volume names, limiting to at most maxnames.

virStoragePoolLookupByName ()

virStoragePoolPtr	virStoragePoolLookupByName	(virConnectPtr conn, 
							 const char * name)

Fetch a storage pool based on its unique name

virStoragePoolLookupByUUID ()

virStoragePoolPtr	virStoragePoolLookupByUUID	(virConnectPtr conn, 
							 const unsigned char * uuid)

Fetch a storage pool based on its globally unique id

virStoragePoolLookupByUUIDString ()

virStoragePoolPtr	virStoragePoolLookupByUUIDString	(virConnectPtr conn, 
							 const char * uuidstr)

Fetch a storage pool based on its globally unique id

virStoragePoolLookupByVolume ()

virStoragePoolPtr	virStoragePoolLookupByVolume	(virStorageVolPtr vol)

Fetch a storage pool which contains a particular volume

virStoragePoolNumOfVolumes ()

int	virStoragePoolNumOfVolumes	(virStoragePoolPtr pool)

Fetch the number of storage volumes within a pool

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

virStoragePoolSetAutostart ()

int	virStoragePoolSetAutostart	(virStoragePoolPtr pool, 
					 int autostart)

Sets the autostart flag

virStoragePoolUndefine ()

int	virStoragePoolUndefine		(virStoragePoolPtr pool)

Undefine an inactive storage pool

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

virStorageVolDelete ()

int	virStorageVolDelete		(virStorageVolPtr vol, 
					 unsigned int flags)

Delete the storage volume from the pool

virStorageVolFree ()

int	virStorageVolFree		(virStorageVolPtr vol)

Release the storage volume handle. The underlying storage volume contains to exist

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.

virStorageVolGetInfo ()

int	virStorageVolGetInfo		(virStorageVolPtr vol, 
					 virStorageVolInfoPtr info)

Fetches volatile information about the storage volume such as its current allocation

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

virStorageVolGetName ()

const char *	virStorageVolGetName	(virStorageVolPtr vol)

Fetch the storage volume name. This is unique within the scope of a pool

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

virStorageVolGetXMLDesc ()

char *	virStorageVolGetXMLDesc		(virStorageVolPtr vol, 
					 unsigned int flags)

Fetch an XML document describing all aspects of the storage volume

virStorageVolLookupByKey ()

virStorageVolPtr	virStorageVolLookupByKey	(virConnectPtr conn, 
							 const char * key)

Fetch a pointer to a storage volume based on its globally unique key

virStorageVolLookupByName ()

virStorageVolPtr	virStorageVolLookupByName	(virStoragePoolPtr pool, 
							 const char * name)

Fetch a pointer to a storage volume based on its name within a pool

virStorageVolLookupByPath ()

virStorageVolPtr	virStorageVolLookupByPath	(virConnectPtr conn, 
							 const char * path)

Fetch a pointer to a storage volume based on its locally (host) unique path